2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <linux/if_tunnel.h>
78 #include <linux/rtnetlink.h>
80 #ifdef CONFIG_IPV6_PRIVACY
81 #include <linux/random.h>
84 #include <asm/uaccess.h>
85 #include <asm/unaligned.h>
87 #include <linux/proc_fs.h>
88 #include <linux/seq_file.h>
90 /* Set to 3 to get tracing... */
94 #define ADBG(x) printk x
99 #define INFINITY_LIFE_TIME 0xFFFFFFFF
100 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
103 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
104 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
107 #ifdef CONFIG_IPV6_PRIVACY
108 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
109 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
110 static void ipv6_regen_rndid(unsigned long data
);
112 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
115 static int ipv6_count_addresses(struct inet6_dev
*idev
);
118 * Configured unicast address hash table
120 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
121 static DEFINE_RWLOCK(addrconf_hash_lock
);
123 static void addrconf_verify(unsigned long);
125 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
126 static DEFINE_SPINLOCK(addrconf_verify_lock
);
128 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
129 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
131 static int addrconf_ifdown(struct net_device
*dev
, int how
);
133 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
134 static void addrconf_dad_timer(unsigned long data
);
135 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
136 static void addrconf_dad_run(struct inet6_dev
*idev
);
137 static void addrconf_rs_timer(unsigned long data
);
138 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
141 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
142 struct prefix_info
*pinfo
);
143 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
145 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
147 struct ipv6_devconf ipv6_devconf __read_mostly
= {
149 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
150 .mtu6
= IPV6_MIN_MTU
,
152 .accept_redirects
= 1,
154 .force_mld_version
= 0,
156 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
157 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
158 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
159 #ifdef CONFIG_IPV6_PRIVACY
161 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
162 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
163 .regen_max_retry
= REGEN_MAX_RETRY
,
164 .max_desync_factor
= MAX_DESYNC_FACTOR
,
166 .max_addresses
= IPV6_MAX_ADDRESSES
,
167 .accept_ra_defrtr
= 1,
168 .accept_ra_pinfo
= 1,
169 #ifdef CONFIG_IPV6_ROUTER_PREF
170 .accept_ra_rtr_pref
= 1,
171 .rtr_probe_interval
= 60 * HZ
,
172 #ifdef CONFIG_IPV6_ROUTE_INFO
173 .accept_ra_rt_info_max_plen
= 0,
177 .accept_source_route
= 0, /* we do not accept RH0 by default. */
180 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
182 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
183 .mtu6
= IPV6_MIN_MTU
,
185 .accept_redirects
= 1,
188 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
189 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
190 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
191 #ifdef CONFIG_IPV6_PRIVACY
193 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
194 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
195 .regen_max_retry
= REGEN_MAX_RETRY
,
196 .max_desync_factor
= MAX_DESYNC_FACTOR
,
198 .max_addresses
= IPV6_MAX_ADDRESSES
,
199 .accept_ra_defrtr
= 1,
200 .accept_ra_pinfo
= 1,
201 #ifdef CONFIG_IPV6_ROUTER_PREF
202 .accept_ra_rtr_pref
= 1,
203 .rtr_probe_interval
= 60 * HZ
,
204 #ifdef CONFIG_IPV6_ROUTE_INFO
205 .accept_ra_rt_info_max_plen
= 0,
209 .accept_source_route
= 0, /* we do not accept RH0 by default. */
212 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
213 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 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
253 if (!idev
|| !idev
->dev
)
256 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
257 sizeof(struct ipstats_mib
),
258 __alignof__(struct ipstats_mib
)) < 0)
260 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
261 sizeof(struct icmpv6_mib
),
262 __alignof__(struct icmpv6_mib
)) < 0)
264 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
265 sizeof(struct icmpv6msg_mib
),
266 __alignof__(struct icmpv6msg_mib
)) < 0)
272 snmp_mib_free((void **)idev
->stats
.icmpv6
);
274 snmp_mib_free((void **)idev
->stats
.ipv6
);
279 static int snmp6_free_dev(struct inet6_dev
*idev
)
281 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
282 snmp_mib_free((void **)idev
->stats
.icmpv6
);
283 snmp_mib_free((void **)idev
->stats
.ipv6
);
287 /* Nobody refers to this device, we may destroy it. */
289 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
291 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
295 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
297 struct net_device
*dev
= idev
->dev
;
298 BUG_TRAP(idev
->addr_list
==NULL
);
299 BUG_TRAP(idev
->mc_list
==NULL
);
300 #ifdef NET_REFCNT_DEBUG
301 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
305 printk("Freeing alive inet6 device %p\n", idev
);
308 snmp6_free_dev(idev
);
309 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
312 EXPORT_SYMBOL(in6_dev_finish_destroy
);
314 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
316 struct inet6_dev
*ndev
;
317 struct in6_addr maddr
;
321 if (dev
->mtu
< IPV6_MIN_MTU
)
324 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
329 rwlock_init(&ndev
->lock
);
331 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
332 ndev
->cnf
.mtu6
= dev
->mtu
;
333 ndev
->cnf
.sysctl
= NULL
;
334 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
335 if (ndev
->nd_parms
== NULL
) {
339 /* We refer to the device */
342 if (snmp6_alloc_dev(ndev
) < 0) {
344 "%s(): cannot allocate memory for statistics; dev=%s.\n",
345 __FUNCTION__
, dev
->name
));
346 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
348 in6_dev_finish_destroy(ndev
);
352 if (snmp6_register_dev(ndev
) < 0) {
354 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
355 __FUNCTION__
, dev
->name
));
356 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
358 in6_dev_finish_destroy(ndev
);
362 /* One reference from device. We must do this before
363 * we invoke __ipv6_regen_rndid().
367 #ifdef CONFIG_IPV6_PRIVACY
368 init_timer(&ndev
->regen_timer
);
369 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
370 ndev
->regen_timer
.data
= (unsigned long) ndev
;
371 if ((dev
->flags
&IFF_LOOPBACK
) ||
372 dev
->type
== ARPHRD_TUNNEL
||
373 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
374 dev
->type
== ARPHRD_SIT
||
376 dev
->type
== ARPHRD_NONE
) {
378 "%s: Disabled Privacy Extensions\n",
380 ndev
->cnf
.use_tempaddr
= -1;
383 ipv6_regen_rndid((unsigned long) ndev
);
387 if (netif_running(dev
) && netif_carrier_ok(dev
))
388 ndev
->if_flags
|= IF_READY
;
390 ipv6_mc_init_dev(ndev
);
391 ndev
->tstamp
= jiffies
;
393 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
394 NET_IPV6_NEIGH
, "ipv6",
395 &ndisc_ifinfo_sysctl_change
,
397 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
399 /* protected by rtnl_lock */
400 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
402 /* Join all-node multicast group */
403 ipv6_addr_all_nodes(&maddr
);
404 ipv6_dev_mc_inc(dev
, &maddr
);
409 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
411 struct inet6_dev
*idev
;
415 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
416 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
420 if (dev
->flags
&IFF_UP
)
426 static void dev_forward_change(struct inet6_dev
*idev
)
428 struct net_device
*dev
;
429 struct inet6_ifaddr
*ifa
;
430 struct in6_addr addr
;
435 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
436 ipv6_addr_all_routers(&addr
);
438 if (idev
->cnf
.forwarding
)
439 ipv6_dev_mc_inc(dev
, &addr
);
441 ipv6_dev_mc_dec(dev
, &addr
);
443 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
444 if (ifa
->flags
&IFA_F_TENTATIVE
)
446 if (idev
->cnf
.forwarding
)
447 addrconf_join_anycast(ifa
);
449 addrconf_leave_anycast(ifa
);
454 static void addrconf_forward_change(void)
456 struct net_device
*dev
;
457 struct inet6_dev
*idev
;
459 read_lock(&dev_base_lock
);
460 for_each_netdev(&init_net
, dev
) {
462 idev
= __in6_dev_get(dev
);
464 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
465 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
467 dev_forward_change(idev
);
471 read_unlock(&dev_base_lock
);
475 /* Nobody refers to this ifaddr, destroy it */
477 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
479 BUG_TRAP(ifp
->if_next
==NULL
);
480 BUG_TRAP(ifp
->lst_next
==NULL
);
481 #ifdef NET_REFCNT_DEBUG
482 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
485 in6_dev_put(ifp
->idev
);
487 if (del_timer(&ifp
->timer
))
488 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
491 printk("Freeing alive inet6 address %p\n", ifp
);
494 dst_release(&ifp
->rt
->u
.dst
);
500 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
502 struct inet6_ifaddr
*ifa
, **ifap
;
503 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
506 * Each device address list is sorted in order of scope -
507 * global before linklocal.
509 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
510 ifap
= &ifa
->if_next
) {
511 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
515 ifp
->if_next
= *ifap
;
519 /* On success it returns ifp with increased reference count */
521 static struct inet6_ifaddr
*
522 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
523 int scope
, u32 flags
)
525 struct inet6_ifaddr
*ifa
= NULL
;
532 err
= -ENODEV
; /*XXX*/
536 write_lock(&addrconf_hash_lock
);
538 /* Ignore adding duplicate addresses on an interface */
539 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
540 ADBG(("ipv6_add_addr: already assigned\n"));
545 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
548 ADBG(("ipv6_add_addr: malloc failed\n"));
553 rt
= addrconf_dst_alloc(idev
, addr
, 0);
559 ipv6_addr_copy(&ifa
->addr
, addr
);
561 spin_lock_init(&ifa
->lock
);
562 init_timer(&ifa
->timer
);
563 ifa
->timer
.data
= (unsigned long) ifa
;
565 ifa
->prefix_len
= pfxlen
;
566 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
567 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
572 * part one of RFC 4429, section 3.3
573 * We should not configure an address as
574 * optimistic if we do not yet know the link
575 * layer address of our nexhop router
578 if (rt
->rt6i_nexthop
== NULL
)
579 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
586 /* Add to big hash table */
587 hash
= ipv6_addr_hash(addr
);
589 ifa
->lst_next
= inet6_addr_lst
[hash
];
590 inet6_addr_lst
[hash
] = ifa
;
592 write_unlock(&addrconf_hash_lock
);
594 write_lock(&idev
->lock
);
595 /* Add to inet6_dev unicast addr list. */
596 ipv6_link_dev_addr(idev
, ifa
);
598 #ifdef CONFIG_IPV6_PRIVACY
599 if (ifa
->flags
&IFA_F_TEMPORARY
) {
600 ifa
->tmp_next
= idev
->tempaddr_list
;
601 idev
->tempaddr_list
= ifa
;
607 write_unlock(&idev
->lock
);
609 rcu_read_unlock_bh();
611 if (likely(err
== 0))
612 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
620 write_unlock(&addrconf_hash_lock
);
624 /* This function wants to get referenced ifp and releases it before return */
626 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
628 struct inet6_ifaddr
*ifa
, **ifap
;
629 struct inet6_dev
*idev
= ifp
->idev
;
631 int deleted
= 0, onlink
= 0;
632 unsigned long expires
= jiffies
;
634 hash
= ipv6_addr_hash(&ifp
->addr
);
638 write_lock_bh(&addrconf_hash_lock
);
639 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
640 ifap
= &ifa
->lst_next
) {
642 *ifap
= ifa
->lst_next
;
644 ifa
->lst_next
= NULL
;
648 write_unlock_bh(&addrconf_hash_lock
);
650 write_lock_bh(&idev
->lock
);
651 #ifdef CONFIG_IPV6_PRIVACY
652 if (ifp
->flags
&IFA_F_TEMPORARY
) {
653 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
654 ifap
= &ifa
->tmp_next
) {
656 *ifap
= ifa
->tmp_next
;
658 in6_ifa_put(ifp
->ifpub
);
662 ifa
->tmp_next
= NULL
;
669 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
671 *ifap
= ifa
->if_next
;
674 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
678 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
679 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
681 if (ifa
->flags
& IFA_F_PERMANENT
) {
686 unsigned long lifetime
;
691 spin_lock(&ifa
->lock
);
692 lifetime
= min_t(unsigned long,
693 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
694 if (time_before(expires
,
695 ifa
->tstamp
+ lifetime
* HZ
))
696 expires
= ifa
->tstamp
+ lifetime
* HZ
;
697 spin_unlock(&ifa
->lock
);
701 ifap
= &ifa
->if_next
;
703 write_unlock_bh(&idev
->lock
);
705 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
707 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
709 addrconf_del_timer(ifp
);
712 * Purge or update corresponding prefix
714 * 1) we don't purge prefix here if address was not permanent.
715 * prefix is managed by its own lifetime.
716 * 2) if there're no addresses, delete prefix.
717 * 3) if there're still other permanent address(es),
718 * corresponding prefix is still permanent.
719 * 4) otherwise, update prefix lifetime to the
720 * longest valid lifetime among the corresponding
721 * addresses on the device.
722 * Note: subsequent RA will update lifetime.
726 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
727 struct in6_addr prefix
;
730 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
731 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
733 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
737 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
738 rt
->rt6i_expires
= expires
;
739 rt
->rt6i_flags
|= RTF_EXPIRES
;
742 dst_release(&rt
->u
.dst
);
748 #ifdef CONFIG_IPV6_PRIVACY
749 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
751 struct inet6_dev
*idev
= ifp
->idev
;
752 struct in6_addr addr
, *tmpaddr
;
753 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
759 write_lock(&idev
->lock
);
761 spin_lock_bh(&ift
->lock
);
762 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
763 spin_unlock_bh(&ift
->lock
);
770 if (idev
->cnf
.use_tempaddr
<= 0) {
771 write_unlock(&idev
->lock
);
773 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
778 spin_lock_bh(&ifp
->lock
);
779 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
780 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
781 spin_unlock_bh(&ifp
->lock
);
782 write_unlock(&idev
->lock
);
784 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
790 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
791 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
792 spin_unlock_bh(&ifp
->lock
);
793 write_unlock(&idev
->lock
);
795 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
801 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
802 tmp_valid_lft
= min_t(__u32
,
804 idev
->cnf
.temp_valid_lft
);
805 tmp_prefered_lft
= min_t(__u32
,
807 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
808 tmp_plen
= ifp
->prefix_len
;
809 max_addresses
= idev
->cnf
.max_addresses
;
810 tmp_cstamp
= ifp
->cstamp
;
811 tmp_tstamp
= ifp
->tstamp
;
812 spin_unlock_bh(&ifp
->lock
);
814 write_unlock(&idev
->lock
);
816 addr_flags
= IFA_F_TEMPORARY
;
817 /* set in addrconf_prefix_rcv() */
818 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
819 addr_flags
|= IFA_F_OPTIMISTIC
;
821 ift
= !max_addresses
||
822 ipv6_count_addresses(idev
) < max_addresses
?
823 ipv6_add_addr(idev
, &addr
, tmp_plen
,
824 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
826 if (!ift
|| IS_ERR(ift
)) {
830 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
832 write_lock(&idev
->lock
);
836 spin_lock_bh(&ift
->lock
);
838 ift
->valid_lft
= tmp_valid_lft
;
839 ift
->prefered_lft
= tmp_prefered_lft
;
840 ift
->cstamp
= tmp_cstamp
;
841 ift
->tstamp
= tmp_tstamp
;
842 spin_unlock_bh(&ift
->lock
);
844 addrconf_dad_start(ift
, 0);
853 * Choose an appropriate source address (RFC3484)
855 struct ipv6_saddr_score
{
863 #define IPV6_SADDR_SCORE_LOCAL 0x0001
864 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
865 #define IPV6_SADDR_SCORE_HOA 0x0008
866 #define IPV6_SADDR_SCORE_OIF 0x0010
867 #define IPV6_SADDR_SCORE_LABEL 0x0020
868 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
870 static inline int ipv6_saddr_preferred(int type
)
872 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
873 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
878 /* static matching label */
879 static inline int ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
882 * prefix (longest match) label
883 * -----------------------------
892 if (type
& IPV6_ADDR_LOOPBACK
)
894 else if (type
& IPV6_ADDR_COMPATv4
)
896 else if (type
& IPV6_ADDR_MAPPED
)
898 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
900 else if (addr
->s6_addr16
[0] == htons(0x2002))
902 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
907 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
908 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
910 struct ipv6_saddr_score hiscore
;
911 struct inet6_ifaddr
*ifa_result
= NULL
;
912 int daddr_type
= __ipv6_addr_type(daddr
);
913 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
914 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
915 struct net_device
*dev
;
917 memset(&hiscore
, 0, sizeof(hiscore
));
919 read_lock(&dev_base_lock
);
922 for_each_netdev(&init_net
, dev
) {
923 struct inet6_dev
*idev
;
924 struct inet6_ifaddr
*ifa
;
926 /* Rule 0: Candidate Source Address (section 4)
927 * - multicast and link-local destination address,
928 * the set of candidate source address MUST only
929 * include addresses assigned to interfaces
930 * belonging to the same link as the outgoing
932 * (- For site-local destination addresses, the
933 * set of candidate source addresses MUST only
934 * include addresses assigned to interfaces
935 * belonging to the same site as the outgoing
938 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
939 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
940 daddr_dev
&& dev
!= daddr_dev
)
943 idev
= __in6_dev_get(dev
);
947 read_lock_bh(&idev
->lock
);
948 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
949 struct ipv6_saddr_score score
;
951 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
954 * - Tentative Address (RFC2462 section 5.4)
955 * - A tentative address is not considered
956 * "assigned to an interface" in the traditional
957 * sense, unless it is also flagged as optimistic.
958 * - Candidate Source Address (section 4)
959 * - In any case, anycast addresses, multicast
960 * addresses, and the unspecified address MUST
961 * NOT be included in a candidate set.
963 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
964 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
966 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
967 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
968 LIMIT_NETDEBUG(KERN_DEBUG
969 "ADDRCONF: unspecified / multicast address"
970 "assigned as unicast address on %s",
980 if (ifa_result
== NULL
) {
981 /* record it if the first available entry */
985 /* Rule 1: Prefer same address */
986 if (hiscore
.rule
< 1) {
987 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
988 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
991 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
992 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
993 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
998 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
1002 /* Rule 2: Prefer appropriate scope */
1003 if (hiscore
.rule
< 2) {
1004 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
1007 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
1008 if (hiscore
.scope
< score
.scope
) {
1009 if (hiscore
.scope
< daddr_scope
) {
1014 } else if (score
.scope
< hiscore
.scope
) {
1015 if (score
.scope
< daddr_scope
)
1016 break; /* addresses sorted by scope */
1023 /* Rule 3: Avoid deprecated and optimistic addresses */
1024 if (hiscore
.rule
< 3) {
1025 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1026 (((ifa_result
->flags
&
1027 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1028 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1031 if (ipv6_saddr_preferred(score
.addr_type
) ||
1033 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1034 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1035 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1040 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1044 /* Rule 4: Prefer home address */
1045 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1046 if (hiscore
.rule
< 4) {
1047 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1048 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1051 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1052 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1053 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1058 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1062 if (hiscore
.rule
< 4)
1066 /* Rule 5: Prefer outgoing interface */
1067 if (hiscore
.rule
< 5) {
1068 if (daddr_dev
== NULL
||
1069 daddr_dev
== ifa_result
->idev
->dev
)
1070 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1073 if (daddr_dev
== NULL
||
1074 daddr_dev
== ifa
->idev
->dev
) {
1075 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1076 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1081 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1085 /* Rule 6: Prefer matching label */
1086 if (hiscore
.rule
< 6) {
1087 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1088 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1091 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1092 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1093 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1098 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1102 #ifdef CONFIG_IPV6_PRIVACY
1103 /* Rule 7: Prefer public address
1104 * Note: prefer temprary address if use_tempaddr >= 2
1106 if (hiscore
.rule
< 7) {
1107 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1108 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1109 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1112 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1113 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1114 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1115 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1120 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1124 if (hiscore
.rule
< 7)
1127 /* Rule 8: Use longest matching prefix */
1128 if (hiscore
.rule
< 8) {
1129 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1132 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1133 if (score
.matchlen
> hiscore
.matchlen
) {
1138 else if (score
.matchlen
< hiscore
.matchlen
)
1142 /* Final Rule: choose first available one */
1146 in6_ifa_put(ifa_result
);
1151 read_unlock_bh(&idev
->lock
);
1154 read_unlock(&dev_base_lock
);
1157 return -EADDRNOTAVAIL
;
1159 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1160 in6_ifa_put(ifa_result
);
1165 int ipv6_get_saddr(struct dst_entry
*dst
,
1166 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1168 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1171 EXPORT_SYMBOL(ipv6_get_saddr
);
1173 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1174 unsigned char banned_flags
)
1176 struct inet6_dev
*idev
;
1177 int err
= -EADDRNOTAVAIL
;
1180 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1181 struct inet6_ifaddr
*ifp
;
1183 read_lock_bh(&idev
->lock
);
1184 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1185 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1186 ipv6_addr_copy(addr
, &ifp
->addr
);
1191 read_unlock_bh(&idev
->lock
);
1197 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1200 struct inet6_ifaddr
*ifp
;
1202 read_lock_bh(&idev
->lock
);
1203 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1205 read_unlock_bh(&idev
->lock
);
1209 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1211 struct inet6_ifaddr
* ifp
;
1212 u8 hash
= ipv6_addr_hash(addr
);
1214 read_lock_bh(&addrconf_hash_lock
);
1215 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1216 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1217 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1218 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1219 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1223 read_unlock_bh(&addrconf_hash_lock
);
1227 EXPORT_SYMBOL(ipv6_chk_addr
);
1230 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1232 struct inet6_ifaddr
* ifp
;
1233 u8 hash
= ipv6_addr_hash(addr
);
1235 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1236 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1237 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1244 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1246 struct inet6_ifaddr
* ifp
;
1247 u8 hash
= ipv6_addr_hash(addr
);
1249 read_lock_bh(&addrconf_hash_lock
);
1250 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1251 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1252 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1253 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1259 read_unlock_bh(&addrconf_hash_lock
);
1264 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1266 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1267 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1268 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1269 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1270 int sk_ipv6only
= ipv6_only_sock(sk
);
1271 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1272 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1273 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1275 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1278 if (addr_type2
== IPV6_ADDR_ANY
&&
1279 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1282 if (addr_type
== IPV6_ADDR_ANY
&&
1283 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1286 if (sk2_rcv_saddr6
&&
1287 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1290 if (addr_type
== IPV6_ADDR_MAPPED
&&
1292 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1298 /* Gets referenced address, destroys ifaddr */
1300 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1302 if (ifp
->flags
&IFA_F_PERMANENT
) {
1303 spin_lock_bh(&ifp
->lock
);
1304 addrconf_del_timer(ifp
);
1305 ifp
->flags
|= IFA_F_TENTATIVE
;
1306 spin_unlock_bh(&ifp
->lock
);
1308 #ifdef CONFIG_IPV6_PRIVACY
1309 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1310 struct inet6_ifaddr
*ifpub
;
1311 spin_lock_bh(&ifp
->lock
);
1314 in6_ifa_hold(ifpub
);
1315 spin_unlock_bh(&ifp
->lock
);
1316 ipv6_create_tempaddr(ifpub
, ifp
);
1319 spin_unlock_bh(&ifp
->lock
);
1327 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1329 if (net_ratelimit())
1330 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1331 addrconf_dad_stop(ifp
);
1334 /* Join to solicited addr multicast group. */
1336 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1338 struct in6_addr maddr
;
1340 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1343 addrconf_addr_solict_mult(addr
, &maddr
);
1344 ipv6_dev_mc_inc(dev
, &maddr
);
1347 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1349 struct in6_addr maddr
;
1351 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1354 addrconf_addr_solict_mult(addr
, &maddr
);
1355 __ipv6_dev_mc_dec(idev
, &maddr
);
1358 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1360 struct in6_addr addr
;
1361 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1362 if (ipv6_addr_any(&addr
))
1364 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1367 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1369 struct in6_addr addr
;
1370 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1371 if (ipv6_addr_any(&addr
))
1373 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1376 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1378 if (dev
->addr_len
!= ETH_ALEN
)
1380 memcpy(eui
, dev
->dev_addr
, 3);
1381 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1384 * The zSeries OSA network cards can be shared among various
1385 * OS instances, but the OSA cards have only one MAC address.
1386 * This leads to duplicate address conflicts in conjunction
1387 * with IPv6 if more than one instance uses the same card.
1389 * The driver for these cards can deliver a unique 16-bit
1390 * identifier for each instance sharing the same card. It is
1391 * placed instead of 0xFFFE in the interface identifier. The
1392 * "u" bit of the interface identifier is not inverted in this
1393 * case. Hence the resulting interface identifier has local
1394 * scope according to RFC2373.
1397 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1398 eui
[4] = dev
->dev_id
& 0xFF;
1407 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1409 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1410 if (dev
->addr_len
!= ARCNET_ALEN
)
1413 eui
[7] = *(u8
*)dev
->dev_addr
;
1417 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1419 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1421 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1426 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1428 switch (dev
->type
) {
1431 case ARPHRD_IEEE802_TR
:
1432 return addrconf_ifid_eui48(eui
, dev
);
1434 return addrconf_ifid_arcnet(eui
, dev
);
1435 case ARPHRD_INFINIBAND
:
1436 return addrconf_ifid_infiniband(eui
, dev
);
1441 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1444 struct inet6_ifaddr
*ifp
;
1446 read_lock_bh(&idev
->lock
);
1447 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1448 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1449 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1454 read_unlock_bh(&idev
->lock
);
1458 #ifdef CONFIG_IPV6_PRIVACY
1459 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1460 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1463 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1464 idev
->rndid
[0] &= ~0x02;
1467 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1468 * check if generated address is not inappropriate
1470 * - Reserved subnet anycast (RFC 2526)
1471 * 11111101 11....11 1xxxxxxx
1472 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1473 * 00-00-5E-FE-xx-xx-xx-xx
1475 * - XXX: already assigned to an address on the device
1477 if (idev
->rndid
[0] == 0xfd &&
1478 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1479 (idev
->rndid
[7]&0x80))
1481 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1482 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1484 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1491 static void ipv6_regen_rndid(unsigned long data
)
1493 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1494 unsigned long expires
;
1497 write_lock_bh(&idev
->lock
);
1502 if (__ipv6_regen_rndid(idev
) < 0)
1506 idev
->cnf
.temp_prefered_lft
* HZ
-
1507 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1508 if (time_before(expires
, jiffies
)) {
1510 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1515 if (!mod_timer(&idev
->regen_timer
, expires
))
1519 write_unlock_bh(&idev
->lock
);
1520 rcu_read_unlock_bh();
1524 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1527 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1528 ret
= __ipv6_regen_rndid(idev
);
1538 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1539 unsigned long expires
, u32 flags
)
1541 struct fib6_config cfg
= {
1542 .fc_table
= RT6_TABLE_PREFIX
,
1543 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1544 .fc_ifindex
= dev
->ifindex
,
1545 .fc_expires
= expires
,
1547 .fc_flags
= RTF_UP
| flags
,
1550 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1552 /* Prevent useless cloning on PtP SIT.
1553 This thing is done here expecting that the whole
1554 class of non-broadcast devices need not cloning.
1556 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1557 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1558 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1561 ip6_route_add(&cfg
);
1564 /* Create "default" multicast route to the interface */
1566 static void addrconf_add_mroute(struct net_device
*dev
)
1568 struct fib6_config cfg
= {
1569 .fc_table
= RT6_TABLE_LOCAL
,
1570 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1571 .fc_ifindex
= dev
->ifindex
,
1576 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1578 ip6_route_add(&cfg
);
1581 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1582 static void sit_route_add(struct net_device
*dev
)
1584 struct fib6_config cfg
= {
1585 .fc_table
= RT6_TABLE_MAIN
,
1586 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1587 .fc_ifindex
= dev
->ifindex
,
1589 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1592 /* prefix length - 96 bits "::d.d.d.d" */
1593 ip6_route_add(&cfg
);
1597 static void addrconf_add_lroute(struct net_device
*dev
)
1599 struct in6_addr addr
;
1601 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1602 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1605 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1607 struct inet6_dev
*idev
;
1611 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1614 /* Add default multicast route */
1615 addrconf_add_mroute(dev
);
1617 /* Add link local route */
1618 addrconf_add_lroute(dev
);
1622 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1624 struct prefix_info
*pinfo
;
1628 unsigned long rt_expires
;
1629 struct inet6_dev
*in6_dev
;
1631 pinfo
= (struct prefix_info
*) opt
;
1633 if (len
< sizeof(struct prefix_info
)) {
1634 ADBG(("addrconf: prefix option too short\n"));
1639 * Validation checks ([ADDRCONF], page 19)
1642 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1644 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1647 valid_lft
= ntohl(pinfo
->valid
);
1648 prefered_lft
= ntohl(pinfo
->prefered
);
1650 if (prefered_lft
> valid_lft
) {
1651 if (net_ratelimit())
1652 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1656 in6_dev
= in6_dev_get(dev
);
1658 if (in6_dev
== NULL
) {
1659 if (net_ratelimit())
1660 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1665 * Two things going on here:
1666 * 1) Add routes for on-link prefixes
1667 * 2) Configure prefixes with the auto flag set
1670 /* Avoid arithmetic overflow. Really, we could
1671 save rt_expires in seconds, likely valid_lft,
1672 but it would require division in fib gc, that it
1675 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1676 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1678 rt_expires
= valid_lft
* HZ
;
1681 * We convert this (in jiffies) to clock_t later.
1682 * Avoid arithmetic overflow there as well.
1683 * Overflow can happen only if HZ < USER_HZ.
1685 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1686 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1688 if (pinfo
->onlink
) {
1689 struct rt6_info
*rt
;
1690 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1692 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1693 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1694 if (valid_lft
== 0) {
1698 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1701 } else if (valid_lft
) {
1702 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1703 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1706 dst_release(&rt
->u
.dst
);
1709 /* Try to figure out our local address for this prefix */
1711 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1712 struct inet6_ifaddr
* ifp
;
1713 struct in6_addr addr
;
1714 int create
= 0, update_lft
= 0;
1716 if (pinfo
->prefix_len
== 64) {
1717 memcpy(&addr
, &pinfo
->prefix
, 8);
1718 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1719 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1720 in6_dev_put(in6_dev
);
1725 if (net_ratelimit())
1726 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1728 in6_dev_put(in6_dev
);
1733 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1735 if (ifp
== NULL
&& valid_lft
) {
1736 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1739 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1740 if (in6_dev
->cnf
.optimistic_dad
&&
1741 !ipv6_devconf
.forwarding
)
1742 addr_flags
= IFA_F_OPTIMISTIC
;
1745 /* Do not allow to create too much of autoconfigured
1746 * addresses; this would be too easy way to crash kernel.
1748 if (!max_addresses
||
1749 ipv6_count_addresses(in6_dev
) < max_addresses
)
1750 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1751 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1754 if (!ifp
|| IS_ERR(ifp
)) {
1755 in6_dev_put(in6_dev
);
1759 update_lft
= create
= 1;
1760 ifp
->cstamp
= jiffies
;
1761 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1767 #ifdef CONFIG_IPV6_PRIVACY
1768 struct inet6_ifaddr
*ift
;
1772 /* update lifetime (RFC2462 5.5.3 e) */
1773 spin_lock(&ifp
->lock
);
1775 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1776 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1779 if (!update_lft
&& stored_lft
) {
1780 if (valid_lft
> MIN_VALID_LIFETIME
||
1781 valid_lft
> stored_lft
)
1783 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1784 /* valid_lft <= stored_lft is always true */
1788 valid_lft
= MIN_VALID_LIFETIME
;
1789 if (valid_lft
< prefered_lft
)
1790 prefered_lft
= valid_lft
;
1796 ifp
->valid_lft
= valid_lft
;
1797 ifp
->prefered_lft
= prefered_lft
;
1800 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1801 spin_unlock(&ifp
->lock
);
1803 if (!(flags
&IFA_F_TENTATIVE
))
1804 ipv6_ifa_notify(0, ifp
);
1806 spin_unlock(&ifp
->lock
);
1808 #ifdef CONFIG_IPV6_PRIVACY
1809 read_lock_bh(&in6_dev
->lock
);
1810 /* update all temporary addresses in the list */
1811 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1813 * When adjusting the lifetimes of an existing
1814 * temporary address, only lower the lifetimes.
1815 * Implementations must not increase the
1816 * lifetimes of an existing temporary address
1817 * when processing a Prefix Information Option.
1819 spin_lock(&ift
->lock
);
1821 if (ift
->valid_lft
> valid_lft
&&
1822 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1823 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1824 if (ift
->prefered_lft
> prefered_lft
&&
1825 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1826 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1827 spin_unlock(&ift
->lock
);
1828 if (!(flags
&IFA_F_TENTATIVE
))
1829 ipv6_ifa_notify(0, ift
);
1832 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1834 * When a new public address is created as described in [ADDRCONF],
1835 * also create a new temporary address.
1837 read_unlock_bh(&in6_dev
->lock
);
1838 ipv6_create_tempaddr(ifp
, NULL
);
1840 read_unlock_bh(&in6_dev
->lock
);
1847 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1848 in6_dev_put(in6_dev
);
1852 * Set destination address.
1853 * Special case for SIT interfaces where we create a new "virtual"
1856 int addrconf_set_dstaddr(void __user
*arg
)
1858 struct in6_ifreq ireq
;
1859 struct net_device
*dev
;
1865 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1868 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1874 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1875 if (dev
->type
== ARPHRD_SIT
) {
1878 struct ip_tunnel_parm p
;
1880 err
= -EADDRNOTAVAIL
;
1881 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1884 memset(&p
, 0, sizeof(p
));
1885 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1889 p
.iph
.protocol
= IPPROTO_IPV6
;
1891 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1893 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1894 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1899 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1901 err
= dev_open(dev
);
1912 * Manual configuration of address on an interface
1914 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1915 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1917 struct inet6_ifaddr
*ifp
;
1918 struct inet6_dev
*idev
;
1919 struct net_device
*dev
;
1921 u32 flags
= RTF_EXPIRES
;
1925 /* check the lifetime */
1926 if (!valid_lft
|| prefered_lft
> valid_lft
)
1929 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1932 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1935 scope
= ipv6_addr_scope(pfx
);
1937 if (valid_lft
== INFINITY_LIFE_TIME
) {
1938 ifa_flags
|= IFA_F_PERMANENT
;
1940 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1941 valid_lft
= 0x7FFFFFFF/HZ
;
1943 if (prefered_lft
== 0)
1944 ifa_flags
|= IFA_F_DEPRECATED
;
1945 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1946 (prefered_lft
!= INFINITY_LIFE_TIME
))
1947 prefered_lft
= 0x7FFFFFFF/HZ
;
1949 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1952 spin_lock_bh(&ifp
->lock
);
1953 ifp
->valid_lft
= valid_lft
;
1954 ifp
->prefered_lft
= prefered_lft
;
1955 ifp
->tstamp
= jiffies
;
1956 spin_unlock_bh(&ifp
->lock
);
1958 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1959 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1961 * Note that section 3.1 of RFC 4429 indicates
1962 * that the Optimistic flag should not be set for
1963 * manually configured addresses
1965 addrconf_dad_start(ifp
, 0);
1971 return PTR_ERR(ifp
);
1974 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1976 struct inet6_ifaddr
*ifp
;
1977 struct inet6_dev
*idev
;
1978 struct net_device
*dev
;
1980 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1983 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1986 read_lock_bh(&idev
->lock
);
1987 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1988 if (ifp
->prefix_len
== plen
&&
1989 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1991 read_unlock_bh(&idev
->lock
);
1995 /* If the last address is deleted administratively,
1996 disable IPv6 on this interface.
1998 if (idev
->addr_list
== NULL
)
1999 addrconf_ifdown(idev
->dev
, 1);
2003 read_unlock_bh(&idev
->lock
);
2004 return -EADDRNOTAVAIL
;
2008 int addrconf_add_ifaddr(void __user
*arg
)
2010 struct in6_ifreq ireq
;
2013 if (!capable(CAP_NET_ADMIN
))
2016 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2020 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
2021 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2026 int addrconf_del_ifaddr(void __user
*arg
)
2028 struct in6_ifreq ireq
;
2031 if (!capable(CAP_NET_ADMIN
))
2034 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2038 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2043 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2044 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2046 struct inet6_ifaddr
* ifp
;
2047 struct in6_addr addr
;
2048 struct net_device
*dev
;
2053 memset(&addr
, 0, sizeof(struct in6_addr
));
2054 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2056 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2057 addr
.s6_addr32
[0] = htonl(0xfe800000);
2060 scope
= IPV6_ADDR_COMPATv4
;
2063 if (addr
.s6_addr32
[3]) {
2064 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2066 spin_lock_bh(&ifp
->lock
);
2067 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2068 spin_unlock_bh(&ifp
->lock
);
2069 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2075 for_each_netdev(&init_net
, dev
) {
2076 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2077 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2078 struct in_ifaddr
* ifa
;
2082 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2085 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2087 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2089 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2090 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2094 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2099 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2102 spin_lock_bh(&ifp
->lock
);
2103 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2104 spin_unlock_bh(&ifp
->lock
);
2105 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2114 static void init_loopback(struct net_device
*dev
)
2116 struct inet6_dev
*idev
;
2117 struct inet6_ifaddr
* ifp
;
2123 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2124 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2128 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2130 spin_lock_bh(&ifp
->lock
);
2131 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2132 spin_unlock_bh(&ifp
->lock
);
2133 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2138 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2140 struct inet6_ifaddr
* ifp
;
2141 u32 addr_flags
= IFA_F_PERMANENT
;
2143 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2144 if (idev
->cnf
.optimistic_dad
&&
2145 !ipv6_devconf
.forwarding
)
2146 addr_flags
|= IFA_F_OPTIMISTIC
;
2150 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2152 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2153 addrconf_dad_start(ifp
, 0);
2158 static void addrconf_dev_config(struct net_device
*dev
)
2160 struct in6_addr addr
;
2161 struct inet6_dev
* idev
;
2165 if ((dev
->type
!= ARPHRD_ETHER
) &&
2166 (dev
->type
!= ARPHRD_FDDI
) &&
2167 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2168 (dev
->type
!= ARPHRD_ARCNET
) &&
2169 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2170 /* Alas, we support only Ethernet autoconfiguration. */
2174 idev
= addrconf_add_dev(dev
);
2178 memset(&addr
, 0, sizeof(struct in6_addr
));
2179 addr
.s6_addr32
[0] = htonl(0xFE800000);
2181 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2182 addrconf_add_linklocal(idev
, &addr
);
2185 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2186 static void addrconf_sit_config(struct net_device
*dev
)
2188 struct inet6_dev
*idev
;
2193 * Configure the tunnel with one of our IPv4
2194 * addresses... we should configure all of
2195 * our v4 addrs in the tunnel
2198 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2199 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2203 sit_add_v4_addrs(idev
);
2205 if (dev
->flags
&IFF_POINTOPOINT
) {
2206 addrconf_add_mroute(dev
);
2207 addrconf_add_lroute(dev
);
2214 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2216 struct in6_addr lladdr
;
2218 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2219 addrconf_add_linklocal(idev
, &lladdr
);
2225 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2227 struct net_device
*link_dev
;
2229 /* first try to inherit the link-local address from the link device */
2230 if (idev
->dev
->iflink
&&
2231 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2232 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2235 /* then try to inherit it from any device */
2236 for_each_netdev(&init_net
, link_dev
) {
2237 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2240 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2244 * Autoconfigure tunnel with a link-local address so routing protocols,
2245 * DHCPv6, MLD etc. can be run over the virtual link
2248 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2250 struct inet6_dev
*idev
;
2254 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2255 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2258 ip6_tnl_add_linklocal(idev
);
2261 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2264 struct net_device
*dev
= (struct net_device
*) data
;
2265 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2266 int run_pending
= 0;
2269 if (dev
->nd_net
!= &init_net
)
2273 case NETDEV_REGISTER
:
2274 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2275 idev
= ipv6_add_dev(dev
);
2277 return notifier_from_errno(-ENOMEM
);
2282 if (dev
->flags
& IFF_SLAVE
)
2285 if (event
== NETDEV_UP
) {
2286 if (!netif_carrier_ok(dev
)) {
2287 /* device is not ready yet. */
2289 "ADDRCONF(NETDEV_UP): %s: "
2290 "link is not ready\n",
2296 idev
->if_flags
|= IF_READY
;
2298 if (!netif_carrier_ok(dev
)) {
2299 /* device is still not ready. */
2304 if (idev
->if_flags
& IF_READY
) {
2305 /* device is already configured. */
2308 idev
->if_flags
|= IF_READY
;
2312 "ADDRCONF(NETDEV_CHANGE): %s: "
2313 "link becomes ready\n",
2320 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2322 addrconf_sit_config(dev
);
2325 case ARPHRD_TUNNEL6
:
2326 addrconf_ip6_tnl_config(dev
);
2328 case ARPHRD_LOOPBACK
:
2333 addrconf_dev_config(dev
);
2338 addrconf_dad_run(idev
);
2340 /* If the MTU changed during the interface down, when the
2341 interface up, the changed MTU must be reflected in the
2342 idev as well as routers.
2344 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2345 rt6_mtu_change(dev
, dev
->mtu
);
2346 idev
->cnf
.mtu6
= dev
->mtu
;
2348 idev
->tstamp
= jiffies
;
2349 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2350 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2351 stop IPv6 on this interface.
2353 if (dev
->mtu
< IPV6_MIN_MTU
)
2354 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2358 case NETDEV_CHANGEMTU
:
2359 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2360 rt6_mtu_change(dev
, dev
->mtu
);
2361 idev
->cnf
.mtu6
= dev
->mtu
;
2365 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2368 case NETDEV_UNREGISTER
:
2370 * Remove all addresses from this interface.
2372 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2375 case NETDEV_CHANGENAME
:
2377 snmp6_unregister_dev(idev
);
2378 #ifdef CONFIG_SYSCTL
2379 addrconf_sysctl_unregister(&idev
->cnf
);
2380 neigh_sysctl_unregister(idev
->nd_parms
);
2381 neigh_sysctl_register(dev
, idev
->nd_parms
,
2382 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2383 &ndisc_ifinfo_sysctl_change
,
2385 addrconf_sysctl_register(idev
, &idev
->cnf
);
2387 err
= snmp6_register_dev(idev
);
2389 return notifier_from_errno(err
);
2398 * addrconf module should be notified of a device going up
2400 static struct notifier_block ipv6_dev_notf
= {
2401 .notifier_call
= addrconf_notify
,
2405 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2407 struct inet6_dev
*idev
;
2408 struct inet6_ifaddr
*ifa
, **bifa
;
2413 if (dev
== loopback_dev
&& how
== 1)
2417 neigh_ifdown(&nd_tbl
, dev
);
2419 idev
= __in6_dev_get(dev
);
2423 /* Step 1: remove reference to ipv6 device from parent device.
2429 /* protected by rtnl_lock */
2430 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2432 /* Step 1.5: remove snmp6 entry */
2433 snmp6_unregister_dev(idev
);
2437 /* Step 2: clear hash table */
2438 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2439 bifa
= &inet6_addr_lst
[i
];
2441 write_lock_bh(&addrconf_hash_lock
);
2442 while ((ifa
= *bifa
) != NULL
) {
2443 if (ifa
->idev
== idev
) {
2444 *bifa
= ifa
->lst_next
;
2445 ifa
->lst_next
= NULL
;
2446 addrconf_del_timer(ifa
);
2450 bifa
= &ifa
->lst_next
;
2452 write_unlock_bh(&addrconf_hash_lock
);
2455 write_lock_bh(&idev
->lock
);
2457 /* Step 3: clear flags for stateless addrconf */
2459 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2461 /* Step 4: clear address list */
2462 #ifdef CONFIG_IPV6_PRIVACY
2463 if (how
== 1 && del_timer(&idev
->regen_timer
))
2466 /* clear tempaddr list */
2467 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2468 idev
->tempaddr_list
= ifa
->tmp_next
;
2469 ifa
->tmp_next
= NULL
;
2471 write_unlock_bh(&idev
->lock
);
2472 spin_lock_bh(&ifa
->lock
);
2475 in6_ifa_put(ifa
->ifpub
);
2478 spin_unlock_bh(&ifa
->lock
);
2480 write_lock_bh(&idev
->lock
);
2483 while ((ifa
= idev
->addr_list
) != NULL
) {
2484 idev
->addr_list
= ifa
->if_next
;
2485 ifa
->if_next
= NULL
;
2487 addrconf_del_timer(ifa
);
2488 write_unlock_bh(&idev
->lock
);
2490 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2491 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2494 write_lock_bh(&idev
->lock
);
2496 write_unlock_bh(&idev
->lock
);
2498 /* Step 5: Discard multicast list */
2501 ipv6_mc_destroy_dev(idev
);
2505 idev
->tstamp
= jiffies
;
2507 /* Shot the device (if unregistered) */
2510 #ifdef CONFIG_SYSCTL
2511 addrconf_sysctl_unregister(&idev
->cnf
);
2512 neigh_sysctl_unregister(idev
->nd_parms
);
2514 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2515 neigh_ifdown(&nd_tbl
, dev
);
2521 static void addrconf_rs_timer(unsigned long data
)
2523 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2525 if (ifp
->idev
->cnf
.forwarding
)
2528 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2530 * Announcement received after solicitation
2536 spin_lock(&ifp
->lock
);
2537 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2538 struct in6_addr all_routers
;
2540 /* The wait after the last probe can be shorter */
2541 addrconf_mod_timer(ifp
, AC_RS
,
2542 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2543 ifp
->idev
->cnf
.rtr_solicit_delay
:
2544 ifp
->idev
->cnf
.rtr_solicit_interval
);
2545 spin_unlock(&ifp
->lock
);
2547 ipv6_addr_all_routers(&all_routers
);
2549 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2551 spin_unlock(&ifp
->lock
);
2553 * Note: we do not support deprecated "all on-link"
2554 * assumption any longer.
2556 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2557 ifp
->idev
->dev
->name
);
2565 * Duplicate Address Detection
2567 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2569 unsigned long rand_num
;
2570 struct inet6_dev
*idev
= ifp
->idev
;
2572 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2575 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2577 ifp
->probes
= idev
->cnf
.dad_transmits
;
2578 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2581 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2583 struct inet6_dev
*idev
= ifp
->idev
;
2584 struct net_device
*dev
= idev
->dev
;
2586 addrconf_join_solict(dev
, &ifp
->addr
);
2588 net_srandom(ifp
->addr
.s6_addr32
[3]);
2590 read_lock_bh(&idev
->lock
);
2593 spin_lock_bh(&ifp
->lock
);
2595 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2596 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2597 ifp
->flags
& IFA_F_NODAD
) {
2598 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2599 spin_unlock_bh(&ifp
->lock
);
2600 read_unlock_bh(&idev
->lock
);
2602 addrconf_dad_completed(ifp
);
2606 if (!(idev
->if_flags
& IF_READY
)) {
2607 spin_unlock_bh(&ifp
->lock
);
2608 read_unlock_bh(&idev
->lock
);
2610 * If the defice is not ready:
2611 * - keep it tentative if it is a permanent address.
2612 * - otherwise, kill it.
2615 addrconf_dad_stop(ifp
);
2620 * Optimistic nodes can start receiving
2623 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2624 ip6_ins_rt(ifp
->rt
);
2626 addrconf_dad_kick(ifp
);
2627 spin_unlock_bh(&ifp
->lock
);
2629 read_unlock_bh(&idev
->lock
);
2632 static void addrconf_dad_timer(unsigned long data
)
2634 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2635 struct inet6_dev
*idev
= ifp
->idev
;
2636 struct in6_addr unspec
;
2637 struct in6_addr mcaddr
;
2639 read_lock_bh(&idev
->lock
);
2641 read_unlock_bh(&idev
->lock
);
2644 spin_lock_bh(&ifp
->lock
);
2645 if (ifp
->probes
== 0) {
2647 * DAD was successful
2650 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2651 spin_unlock_bh(&ifp
->lock
);
2652 read_unlock_bh(&idev
->lock
);
2654 addrconf_dad_completed(ifp
);
2660 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2661 spin_unlock_bh(&ifp
->lock
);
2662 read_unlock_bh(&idev
->lock
);
2664 /* send a neighbour solicitation for our addr */
2665 memset(&unspec
, 0, sizeof(unspec
));
2666 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2667 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2672 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2674 struct net_device
* dev
= ifp
->idev
->dev
;
2677 * Configure the address for reception. Now it is valid.
2680 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2682 /* If added prefix is link local and forwarding is off,
2683 start sending router solicitations.
2686 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2687 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2688 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2689 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2690 struct in6_addr all_routers
;
2692 ipv6_addr_all_routers(&all_routers
);
2695 * If a host as already performed a random delay
2696 * [...] as part of DAD [...] there is no need
2697 * to delay again before sending the first RS
2699 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2701 spin_lock_bh(&ifp
->lock
);
2703 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2704 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2705 spin_unlock_bh(&ifp
->lock
);
2709 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2710 struct inet6_ifaddr
*ifp
;
2712 read_lock_bh(&idev
->lock
);
2713 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2714 spin_lock_bh(&ifp
->lock
);
2715 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2716 spin_unlock_bh(&ifp
->lock
);
2719 spin_unlock_bh(&ifp
->lock
);
2720 addrconf_dad_kick(ifp
);
2722 read_unlock_bh(&idev
->lock
);
2725 #ifdef CONFIG_PROC_FS
2726 struct if6_iter_state
{
2730 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2732 struct inet6_ifaddr
*ifa
= NULL
;
2733 struct if6_iter_state
*state
= seq
->private;
2735 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2736 ifa
= inet6_addr_lst
[state
->bucket
];
2743 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2745 struct if6_iter_state
*state
= seq
->private;
2747 ifa
= ifa
->lst_next
;
2749 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2750 ifa
= inet6_addr_lst
[state
->bucket
];
2756 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2758 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2761 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2763 return pos
? NULL
: ifa
;
2766 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2768 read_lock_bh(&addrconf_hash_lock
);
2769 return if6_get_idx(seq
, *pos
);
2772 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2774 struct inet6_ifaddr
*ifa
;
2776 ifa
= if6_get_next(seq
, v
);
2781 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2783 read_unlock_bh(&addrconf_hash_lock
);
2786 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2788 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2790 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2792 ifp
->idev
->dev
->ifindex
,
2796 ifp
->idev
->dev
->name
);
2800 static const struct seq_operations if6_seq_ops
= {
2801 .start
= if6_seq_start
,
2802 .next
= if6_seq_next
,
2803 .show
= if6_seq_show
,
2804 .stop
= if6_seq_stop
,
2807 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2809 struct seq_file
*seq
;
2811 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2816 rc
= seq_open(file
, &if6_seq_ops
);
2820 seq
= file
->private_data
;
2829 static const struct file_operations if6_fops
= {
2830 .owner
= THIS_MODULE
,
2831 .open
= if6_seq_open
,
2833 .llseek
= seq_lseek
,
2834 .release
= seq_release_private
,
2837 int __init
if6_proc_init(void)
2839 if (!proc_net_fops_create(&init_net
, "if_inet6", S_IRUGO
, &if6_fops
))
2844 void if6_proc_exit(void)
2846 proc_net_remove(&init_net
, "if_inet6");
2848 #endif /* CONFIG_PROC_FS */
2850 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2851 /* Check if address is a home address configured on any interface. */
2852 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2855 struct inet6_ifaddr
* ifp
;
2856 u8 hash
= ipv6_addr_hash(addr
);
2857 read_lock_bh(&addrconf_hash_lock
);
2858 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2859 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2860 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2865 read_unlock_bh(&addrconf_hash_lock
);
2871 * Periodic address status verification
2874 static void addrconf_verify(unsigned long foo
)
2876 struct inet6_ifaddr
*ifp
;
2877 unsigned long now
, next
;
2880 spin_lock_bh(&addrconf_verify_lock
);
2882 next
= now
+ ADDR_CHECK_FREQUENCY
;
2884 del_timer(&addr_chk_timer
);
2886 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2889 read_lock(&addrconf_hash_lock
);
2890 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2892 #ifdef CONFIG_IPV6_PRIVACY
2893 unsigned long regen_advance
;
2896 if (ifp
->flags
& IFA_F_PERMANENT
)
2899 spin_lock(&ifp
->lock
);
2900 age
= (now
- ifp
->tstamp
) / HZ
;
2902 #ifdef CONFIG_IPV6_PRIVACY
2903 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2904 ifp
->idev
->cnf
.dad_transmits
*
2905 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2908 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2909 age
>= ifp
->valid_lft
) {
2910 spin_unlock(&ifp
->lock
);
2912 read_unlock(&addrconf_hash_lock
);
2915 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2916 spin_unlock(&ifp
->lock
);
2918 } else if (age
>= ifp
->prefered_lft
) {
2919 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2922 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2924 ifp
->flags
|= IFA_F_DEPRECATED
;
2927 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2928 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2930 spin_unlock(&ifp
->lock
);
2934 read_unlock(&addrconf_hash_lock
);
2936 ipv6_ifa_notify(0, ifp
);
2940 #ifdef CONFIG_IPV6_PRIVACY
2941 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2942 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2943 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2944 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2945 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2946 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2947 if (!ifp
->regen_count
&& ifpub
) {
2950 in6_ifa_hold(ifpub
);
2951 spin_unlock(&ifp
->lock
);
2952 read_unlock(&addrconf_hash_lock
);
2953 spin_lock(&ifpub
->lock
);
2954 ifpub
->regen_count
= 0;
2955 spin_unlock(&ifpub
->lock
);
2956 ipv6_create_tempaddr(ifpub
, ifp
);
2961 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2962 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2963 spin_unlock(&ifp
->lock
);
2966 /* ifp->prefered_lft <= ifp->valid_lft */
2967 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2968 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2969 spin_unlock(&ifp
->lock
);
2972 read_unlock(&addrconf_hash_lock
);
2975 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2976 add_timer(&addr_chk_timer
);
2977 spin_unlock_bh(&addrconf_verify_lock
);
2980 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2982 struct in6_addr
*pfx
= NULL
;
2985 pfx
= nla_data(addr
);
2988 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2991 pfx
= nla_data(local
);
2997 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
2998 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2999 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3000 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3004 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3006 struct ifaddrmsg
*ifm
;
3007 struct nlattr
*tb
[IFA_MAX
+1];
3008 struct in6_addr
*pfx
;
3011 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3015 ifm
= nlmsg_data(nlh
);
3016 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3020 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3023 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3024 u32 prefered_lft
, u32 valid_lft
)
3026 u32 flags
= RTF_EXPIRES
;
3028 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3031 if (valid_lft
== INFINITY_LIFE_TIME
) {
3032 ifa_flags
|= IFA_F_PERMANENT
;
3034 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3035 valid_lft
= 0x7FFFFFFF/HZ
;
3037 if (prefered_lft
== 0)
3038 ifa_flags
|= IFA_F_DEPRECATED
;
3039 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3040 (prefered_lft
!= INFINITY_LIFE_TIME
))
3041 prefered_lft
= 0x7FFFFFFF/HZ
;
3043 spin_lock_bh(&ifp
->lock
);
3044 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3045 ifp
->tstamp
= jiffies
;
3046 ifp
->valid_lft
= valid_lft
;
3047 ifp
->prefered_lft
= prefered_lft
;
3049 spin_unlock_bh(&ifp
->lock
);
3050 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3051 ipv6_ifa_notify(0, ifp
);
3053 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3054 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3061 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3063 struct ifaddrmsg
*ifm
;
3064 struct nlattr
*tb
[IFA_MAX
+1];
3065 struct in6_addr
*pfx
;
3066 struct inet6_ifaddr
*ifa
;
3067 struct net_device
*dev
;
3068 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3072 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3076 ifm
= nlmsg_data(nlh
);
3077 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3081 if (tb
[IFA_CACHEINFO
]) {
3082 struct ifa_cacheinfo
*ci
;
3084 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3085 valid_lft
= ci
->ifa_valid
;
3086 preferred_lft
= ci
->ifa_prefered
;
3088 preferred_lft
= INFINITY_LIFE_TIME
;
3089 valid_lft
= INFINITY_LIFE_TIME
;
3092 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3096 /* We ignore other flags so far. */
3097 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3099 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3102 * It would be best to check for !NLM_F_CREATE here but
3103 * userspace alreay relies on not having to provide this.
3105 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3106 ifa_flags
, preferred_lft
, valid_lft
);
3109 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3110 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3113 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3120 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3121 u8 scope
, int ifindex
)
3123 struct ifaddrmsg
*ifm
;
3125 ifm
= nlmsg_data(nlh
);
3126 ifm
->ifa_family
= AF_INET6
;
3127 ifm
->ifa_prefixlen
= prefixlen
;
3128 ifm
->ifa_flags
= flags
;
3129 ifm
->ifa_scope
= scope
;
3130 ifm
->ifa_index
= ifindex
;
3133 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3134 unsigned long tstamp
, u32 preferred
, u32 valid
)
3136 struct ifa_cacheinfo ci
;
3138 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3139 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3140 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3141 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3142 ci
.ifa_prefered
= preferred
;
3143 ci
.ifa_valid
= valid
;
3145 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3148 static inline int rt_scope(int ifa_scope
)
3150 if (ifa_scope
& IFA_HOST
)
3151 return RT_SCOPE_HOST
;
3152 else if (ifa_scope
& IFA_LINK
)
3153 return RT_SCOPE_LINK
;
3154 else if (ifa_scope
& IFA_SITE
)
3155 return RT_SCOPE_SITE
;
3157 return RT_SCOPE_UNIVERSE
;
3160 static inline int inet6_ifaddr_msgsize(void)
3162 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3163 + nla_total_size(16) /* IFA_ADDRESS */
3164 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3167 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3168 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3170 struct nlmsghdr
*nlh
;
3171 u32 preferred
, valid
;
3173 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3177 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3178 ifa
->idev
->dev
->ifindex
);
3180 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3181 preferred
= ifa
->prefered_lft
;
3182 valid
= ifa
->valid_lft
;
3183 if (preferred
!= INFINITY_LIFE_TIME
) {
3184 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3186 if (valid
!= INFINITY_LIFE_TIME
)
3190 preferred
= INFINITY_LIFE_TIME
;
3191 valid
= INFINITY_LIFE_TIME
;
3194 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3195 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3196 nlmsg_cancel(skb
, nlh
);
3200 return nlmsg_end(skb
, nlh
);
3203 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3204 u32 pid
, u32 seq
, int event
, u16 flags
)
3206 struct nlmsghdr
*nlh
;
3207 u8 scope
= RT_SCOPE_UNIVERSE
;
3208 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3210 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3211 scope
= RT_SCOPE_SITE
;
3213 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3217 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3218 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3219 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3220 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3221 nlmsg_cancel(skb
, nlh
);
3225 return nlmsg_end(skb
, nlh
);
3228 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3229 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3231 struct nlmsghdr
*nlh
;
3232 u8 scope
= RT_SCOPE_UNIVERSE
;
3233 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3235 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3236 scope
= RT_SCOPE_SITE
;
3238 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3242 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3243 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3244 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3245 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3246 nlmsg_cancel(skb
, nlh
);
3250 return nlmsg_end(skb
, nlh
);
3260 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3261 enum addr_type_t type
)
3264 int s_idx
, s_ip_idx
;
3266 struct net_device
*dev
;
3267 struct inet6_dev
*idev
= NULL
;
3268 struct inet6_ifaddr
*ifa
;
3269 struct ifmcaddr6
*ifmca
;
3270 struct ifacaddr6
*ifaca
;
3272 s_idx
= cb
->args
[0];
3273 s_ip_idx
= ip_idx
= cb
->args
[1];
3276 for_each_netdev(&init_net
, dev
) {
3282 if ((idev
= in6_dev_get(dev
)) == NULL
)
3284 read_lock_bh(&idev
->lock
);
3287 /* unicast address incl. temp addr */
3288 for (ifa
= idev
->addr_list
; ifa
;
3289 ifa
= ifa
->if_next
, ip_idx
++) {
3290 if (ip_idx
< s_ip_idx
)
3292 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3293 NETLINK_CB(cb
->skb
).pid
,
3294 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3299 case MULTICAST_ADDR
:
3300 /* multicast address */
3301 for (ifmca
= idev
->mc_list
; ifmca
;
3302 ifmca
= ifmca
->next
, ip_idx
++) {
3303 if (ip_idx
< s_ip_idx
)
3305 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3306 NETLINK_CB(cb
->skb
).pid
,
3307 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3313 /* anycast address */
3314 for (ifaca
= idev
->ac_list
; ifaca
;
3315 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3316 if (ip_idx
< s_ip_idx
)
3318 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3319 NETLINK_CB(cb
->skb
).pid
,
3320 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3328 read_unlock_bh(&idev
->lock
);
3335 read_unlock_bh(&idev
->lock
);
3339 cb
->args
[1] = ip_idx
;
3343 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3345 enum addr_type_t type
= UNICAST_ADDR
;
3346 return inet6_dump_addr(skb
, cb
, type
);
3349 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3351 enum addr_type_t type
= MULTICAST_ADDR
;
3352 return inet6_dump_addr(skb
, cb
, type
);
3356 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3358 enum addr_type_t type
= ANYCAST_ADDR
;
3359 return inet6_dump_addr(skb
, cb
, type
);
3362 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3365 struct ifaddrmsg
*ifm
;
3366 struct nlattr
*tb
[IFA_MAX
+1];
3367 struct in6_addr
*addr
= NULL
;
3368 struct net_device
*dev
= NULL
;
3369 struct inet6_ifaddr
*ifa
;
3370 struct sk_buff
*skb
;
3373 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3377 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3383 ifm
= nlmsg_data(nlh
);
3385 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3387 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3388 err
= -EADDRNOTAVAIL
;
3392 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3397 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3398 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3400 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3401 WARN_ON(err
== -EMSGSIZE
);
3405 err
= rtnl_unicast(skb
, NETLINK_CB(in_skb
).pid
);
3412 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3414 struct sk_buff
*skb
;
3417 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3421 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3423 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3424 WARN_ON(err
== -EMSGSIZE
);
3428 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3431 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3434 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3435 __s32
*array
, int bytes
)
3437 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3439 memset(array
, 0, bytes
);
3440 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3441 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3442 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3443 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3444 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3445 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3446 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3447 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3448 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3449 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3450 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3451 #ifdef CONFIG_IPV6_PRIVACY
3452 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3453 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3454 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3455 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3456 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3458 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3459 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3460 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3461 #ifdef CONFIG_IPV6_ROUTER_PREF
3462 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3463 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3464 #ifdef CONFIG_IPV6_ROUTE_INFO
3465 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3468 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3469 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3470 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3471 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3475 static inline size_t inet6_if_nlmsg_size(void)
3477 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3478 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3479 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3480 + nla_total_size(4) /* IFLA_MTU */
3481 + nla_total_size(4) /* IFLA_LINK */
3482 + nla_total_size( /* IFLA_PROTINFO */
3483 nla_total_size(4) /* IFLA_INET6_FLAGS */
3484 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3485 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3486 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3487 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3491 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3495 int pad
= bytes
- sizeof(u64
) * items
;
3498 /* Use put_unaligned() because stats may not be aligned for u64. */
3499 put_unaligned(items
, &stats
[0]);
3500 for (i
= 1; i
< items
; i
++)
3501 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3503 memset(&stats
[items
], 0, pad
);
3506 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3510 case IFLA_INET6_STATS
:
3511 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3513 case IFLA_INET6_ICMP6STATS
:
3514 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3519 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3520 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3522 struct net_device
*dev
= idev
->dev
;
3524 struct ifinfomsg
*hdr
;
3525 struct nlmsghdr
*nlh
;
3527 struct ifla_cacheinfo ci
;
3529 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3533 hdr
= nlmsg_data(nlh
);
3534 hdr
->ifi_family
= AF_INET6
;
3536 hdr
->ifi_type
= dev
->type
;
3537 hdr
->ifi_index
= dev
->ifindex
;
3538 hdr
->ifi_flags
= dev_get_flags(dev
);
3539 hdr
->ifi_change
= 0;
3541 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3544 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3546 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3547 if (dev
->ifindex
!= dev
->iflink
)
3548 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3550 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3551 if (protoinfo
== NULL
)
3552 goto nla_put_failure
;
3554 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3556 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3557 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3558 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3559 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3560 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3561 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3563 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3565 goto nla_put_failure
;
3566 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3568 /* XXX - MC not implemented */
3570 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3572 goto nla_put_failure
;
3573 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3575 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3577 goto nla_put_failure
;
3578 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3580 nla_nest_end(skb
, protoinfo
);
3581 return nlmsg_end(skb
, nlh
);
3584 nlmsg_cancel(skb
, nlh
);
3588 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3591 int s_idx
= cb
->args
[0];
3592 struct net_device
*dev
;
3593 struct inet6_dev
*idev
;
3595 read_lock(&dev_base_lock
);
3597 for_each_netdev(&init_net
, dev
) {
3600 if ((idev
= in6_dev_get(dev
)) == NULL
)
3602 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3603 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3610 read_unlock(&dev_base_lock
);
3616 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3618 struct sk_buff
*skb
;
3621 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3625 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3627 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3628 WARN_ON(err
== -EMSGSIZE
);
3632 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3635 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3638 static inline size_t inet6_prefix_nlmsg_size(void)
3640 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3641 + nla_total_size(sizeof(struct in6_addr
))
3642 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3645 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3646 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3647 int event
, unsigned int flags
)
3649 struct prefixmsg
*pmsg
;
3650 struct nlmsghdr
*nlh
;
3651 struct prefix_cacheinfo ci
;
3653 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3657 pmsg
= nlmsg_data(nlh
);
3658 pmsg
->prefix_family
= AF_INET6
;
3659 pmsg
->prefix_pad1
= 0;
3660 pmsg
->prefix_pad2
= 0;
3661 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3662 pmsg
->prefix_len
= pinfo
->prefix_len
;
3663 pmsg
->prefix_type
= pinfo
->type
;
3664 pmsg
->prefix_pad3
= 0;
3665 pmsg
->prefix_flags
= 0;
3667 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3668 if (pinfo
->autoconf
)
3669 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3671 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3673 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3674 ci
.valid_time
= ntohl(pinfo
->valid
);
3675 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3677 return nlmsg_end(skb
, nlh
);
3680 nlmsg_cancel(skb
, nlh
);
3684 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3685 struct prefix_info
*pinfo
)
3687 struct sk_buff
*skb
;
3690 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3694 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3696 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3697 WARN_ON(err
== -EMSGSIZE
);
3701 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3704 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX
, err
);
3707 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3709 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3714 * If the address was optimistic
3715 * we inserted the route at the start of
3716 * our DAD process, so we don't need
3719 if (!(ifp
->rt
->rt6i_node
))
3720 ip6_ins_rt(ifp
->rt
);
3721 if (ifp
->idev
->cnf
.forwarding
)
3722 addrconf_join_anycast(ifp
);
3725 if (ifp
->idev
->cnf
.forwarding
)
3726 addrconf_leave_anycast(ifp
);
3727 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3728 dst_hold(&ifp
->rt
->u
.dst
);
3729 if (ip6_del_rt(ifp
->rt
))
3730 dst_free(&ifp
->rt
->u
.dst
);
3735 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3738 if (likely(ifp
->idev
->dead
== 0))
3739 __ipv6_ifa_notify(event
, ifp
);
3740 rcu_read_unlock_bh();
3743 #ifdef CONFIG_SYSCTL
3746 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3747 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3749 int *valp
= ctl
->data
;
3753 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3755 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3756 if (valp
!= &ipv6_devconf
.forwarding
) {
3757 if ((!*valp
) ^ (!val
)) {
3758 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3761 dev_forward_change(idev
);
3764 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3765 addrconf_forward_change();
3768 rt6_purge_dflt_routers();
3774 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3775 int __user
*name
, int nlen
,
3776 void __user
*oldval
,
3777 size_t __user
*oldlenp
,
3778 void __user
*newval
, size_t newlen
)
3780 int *valp
= table
->data
;
3783 if (!newval
|| !newlen
)
3785 if (newlen
!= sizeof(int))
3787 if (get_user(new, (int __user
*)newval
))
3791 if (oldval
&& oldlenp
) {
3793 if (get_user(len
, oldlenp
))
3796 if (len
> table
->maxlen
)
3797 len
= table
->maxlen
;
3798 if (copy_to_user(oldval
, valp
, len
))
3800 if (put_user(len
, oldlenp
))
3805 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3806 if (valp
!= &ipv6_devconf
.forwarding
) {
3807 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3809 if (unlikely(idev
== NULL
))
3811 changed
= (!*valp
) ^ (!new);
3814 dev_forward_change(idev
);
3817 addrconf_forward_change();
3821 rt6_purge_dflt_routers();
3828 static struct addrconf_sysctl_table
3830 struct ctl_table_header
*sysctl_header
;
3831 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3832 ctl_table addrconf_dev
[2];
3833 ctl_table addrconf_conf_dir
[2];
3834 ctl_table addrconf_proto_dir
[2];
3835 ctl_table addrconf_root_dir
[2];
3836 } addrconf_sysctl __read_mostly
= {
3837 .sysctl_header
= NULL
,
3840 .ctl_name
= NET_IPV6_FORWARDING
,
3841 .procname
= "forwarding",
3842 .data
= &ipv6_devconf
.forwarding
,
3843 .maxlen
= sizeof(int),
3845 .proc_handler
= &addrconf_sysctl_forward
,
3846 .strategy
= &addrconf_sysctl_forward_strategy
,
3849 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3850 .procname
= "hop_limit",
3851 .data
= &ipv6_devconf
.hop_limit
,
3852 .maxlen
= sizeof(int),
3854 .proc_handler
= proc_dointvec
,
3857 .ctl_name
= NET_IPV6_MTU
,
3859 .data
= &ipv6_devconf
.mtu6
,
3860 .maxlen
= sizeof(int),
3862 .proc_handler
= &proc_dointvec
,
3865 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3866 .procname
= "accept_ra",
3867 .data
= &ipv6_devconf
.accept_ra
,
3868 .maxlen
= sizeof(int),
3870 .proc_handler
= &proc_dointvec
,
3873 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3874 .procname
= "accept_redirects",
3875 .data
= &ipv6_devconf
.accept_redirects
,
3876 .maxlen
= sizeof(int),
3878 .proc_handler
= &proc_dointvec
,
3881 .ctl_name
= NET_IPV6_AUTOCONF
,
3882 .procname
= "autoconf",
3883 .data
= &ipv6_devconf
.autoconf
,
3884 .maxlen
= sizeof(int),
3886 .proc_handler
= &proc_dointvec
,
3889 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3890 .procname
= "dad_transmits",
3891 .data
= &ipv6_devconf
.dad_transmits
,
3892 .maxlen
= sizeof(int),
3894 .proc_handler
= &proc_dointvec
,
3897 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3898 .procname
= "router_solicitations",
3899 .data
= &ipv6_devconf
.rtr_solicits
,
3900 .maxlen
= sizeof(int),
3902 .proc_handler
= &proc_dointvec
,
3905 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3906 .procname
= "router_solicitation_interval",
3907 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3908 .maxlen
= sizeof(int),
3910 .proc_handler
= &proc_dointvec_jiffies
,
3911 .strategy
= &sysctl_jiffies
,
3914 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3915 .procname
= "router_solicitation_delay",
3916 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3917 .maxlen
= sizeof(int),
3919 .proc_handler
= &proc_dointvec_jiffies
,
3920 .strategy
= &sysctl_jiffies
,
3923 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3924 .procname
= "force_mld_version",
3925 .data
= &ipv6_devconf
.force_mld_version
,
3926 .maxlen
= sizeof(int),
3928 .proc_handler
= &proc_dointvec
,
3930 #ifdef CONFIG_IPV6_PRIVACY
3932 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3933 .procname
= "use_tempaddr",
3934 .data
= &ipv6_devconf
.use_tempaddr
,
3935 .maxlen
= sizeof(int),
3937 .proc_handler
= &proc_dointvec
,
3940 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3941 .procname
= "temp_valid_lft",
3942 .data
= &ipv6_devconf
.temp_valid_lft
,
3943 .maxlen
= sizeof(int),
3945 .proc_handler
= &proc_dointvec
,
3948 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3949 .procname
= "temp_prefered_lft",
3950 .data
= &ipv6_devconf
.temp_prefered_lft
,
3951 .maxlen
= sizeof(int),
3953 .proc_handler
= &proc_dointvec
,
3956 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3957 .procname
= "regen_max_retry",
3958 .data
= &ipv6_devconf
.regen_max_retry
,
3959 .maxlen
= sizeof(int),
3961 .proc_handler
= &proc_dointvec
,
3964 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3965 .procname
= "max_desync_factor",
3966 .data
= &ipv6_devconf
.max_desync_factor
,
3967 .maxlen
= sizeof(int),
3969 .proc_handler
= &proc_dointvec
,
3973 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3974 .procname
= "max_addresses",
3975 .data
= &ipv6_devconf
.max_addresses
,
3976 .maxlen
= sizeof(int),
3978 .proc_handler
= &proc_dointvec
,
3981 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3982 .procname
= "accept_ra_defrtr",
3983 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3984 .maxlen
= sizeof(int),
3986 .proc_handler
= &proc_dointvec
,
3989 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3990 .procname
= "accept_ra_pinfo",
3991 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3992 .maxlen
= sizeof(int),
3994 .proc_handler
= &proc_dointvec
,
3996 #ifdef CONFIG_IPV6_ROUTER_PREF
3998 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3999 .procname
= "accept_ra_rtr_pref",
4000 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4001 .maxlen
= sizeof(int),
4003 .proc_handler
= &proc_dointvec
,
4006 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4007 .procname
= "router_probe_interval",
4008 .data
= &ipv6_devconf
.rtr_probe_interval
,
4009 .maxlen
= sizeof(int),
4011 .proc_handler
= &proc_dointvec_jiffies
,
4012 .strategy
= &sysctl_jiffies
,
4014 #ifdef CONFIG_IPV6_ROUTE_INFO
4016 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4017 .procname
= "accept_ra_rt_info_max_plen",
4018 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4019 .maxlen
= sizeof(int),
4021 .proc_handler
= &proc_dointvec
,
4026 .ctl_name
= NET_IPV6_PROXY_NDP
,
4027 .procname
= "proxy_ndp",
4028 .data
= &ipv6_devconf
.proxy_ndp
,
4029 .maxlen
= sizeof(int),
4031 .proc_handler
= &proc_dointvec
,
4034 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4035 .procname
= "accept_source_route",
4036 .data
= &ipv6_devconf
.accept_source_route
,
4037 .maxlen
= sizeof(int),
4039 .proc_handler
= &proc_dointvec
,
4041 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4043 .ctl_name
= CTL_UNNUMBERED
,
4044 .procname
= "optimistic_dad",
4045 .data
= &ipv6_devconf
.optimistic_dad
,
4046 .maxlen
= sizeof(int),
4048 .proc_handler
= &proc_dointvec
,
4053 .ctl_name
= 0, /* sentinel */
4058 .ctl_name
= NET_PROTO_CONF_ALL
,
4061 .child
= addrconf_sysctl
.addrconf_vars
,
4064 .ctl_name
= 0, /* sentinel */
4067 .addrconf_conf_dir
= {
4069 .ctl_name
= NET_IPV6_CONF
,
4072 .child
= addrconf_sysctl
.addrconf_dev
,
4075 .ctl_name
= 0, /* sentinel */
4078 .addrconf_proto_dir
= {
4080 .ctl_name
= NET_IPV6
,
4083 .child
= addrconf_sysctl
.addrconf_conf_dir
,
4086 .ctl_name
= 0, /* sentinel */
4089 .addrconf_root_dir
= {
4091 .ctl_name
= CTL_NET
,
4094 .child
= addrconf_sysctl
.addrconf_proto_dir
,
4097 .ctl_name
= 0, /* sentinel */
4102 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4105 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
4106 struct addrconf_sysctl_table
*t
;
4107 char *dev_name
= NULL
;
4109 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4112 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4113 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4114 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4117 dev_name
= dev
->name
;
4118 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
4120 dev_name
= "default";
4121 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
4125 * Make a copy of dev_name, because '.procname' is regarded as const
4126 * by sysctl and we wouldn't want anyone to change it under our feet
4127 * (see SIOCSIFNAME).
4129 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4133 t
->addrconf_dev
[0].procname
= dev_name
;
4135 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
4136 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
4137 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
4138 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
4140 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
4141 if (t
->sysctl_header
== NULL
)
4156 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4159 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4161 unregister_sysctl_table(t
->sysctl_header
);
4162 kfree(t
->addrconf_dev
[0].procname
);
4174 int register_inet6addr_notifier(struct notifier_block
*nb
)
4176 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4179 EXPORT_SYMBOL(register_inet6addr_notifier
);
4181 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4183 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4186 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4189 * Init / cleanup code
4192 int __init
addrconf_init(void)
4196 /* The addrconf netdev notifier requires that loopback_dev
4197 * has it's ipv6 private information allocated and setup
4198 * before it can bring up and give link-local addresses
4199 * to other devices which are up.
4201 * Unfortunately, loopback_dev is not necessarily the first
4202 * entry in the global dev_base list of net devices. In fact,
4203 * it is likely to be the very last entry on that list.
4204 * So this causes the notifier registry below to try and
4205 * give link-local addresses to all devices besides loopback_dev
4206 * first, then loopback_dev, which cases all the non-loopback_dev
4207 * devices to fail to get a link-local address.
4209 * So, as a temporary fix, allocate the ipv6 structure for
4210 * loopback_dev first by hand.
4211 * Longer term, all of the dependencies ipv6 has upon the loopback
4212 * device and it being up should be removed.
4215 if (!ipv6_add_dev(loopback_dev
))
4221 ip6_null_entry
.u
.dst
.dev
= loopback_dev
;
4222 ip6_null_entry
.rt6i_idev
= in6_dev_get(loopback_dev
);
4223 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4224 ip6_prohibit_entry
.u
.dst
.dev
= loopback_dev
;
4225 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(loopback_dev
);
4226 ip6_blk_hole_entry
.u
.dst
.dev
= loopback_dev
;
4227 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(loopback_dev
);
4230 register_netdevice_notifier(&ipv6_dev_notf
);
4234 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4238 /* Only the first call to __rtnl_register can fail */
4239 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4240 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4241 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4242 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4243 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4245 #ifdef CONFIG_SYSCTL
4246 addrconf_sysctl
.sysctl_header
=
4247 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4248 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4253 unregister_netdevice_notifier(&ipv6_dev_notf
);
4258 void __exit
addrconf_cleanup(void)
4260 struct net_device
*dev
;
4261 struct inet6_ifaddr
*ifa
;
4264 unregister_netdevice_notifier(&ipv6_dev_notf
);
4266 #ifdef CONFIG_SYSCTL
4267 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4268 addrconf_sysctl_unregister(&ipv6_devconf
);
4277 for_each_netdev(&init_net
, dev
) {
4278 if (__in6_dev_get(dev
) == NULL
)
4280 addrconf_ifdown(dev
, 1);
4282 addrconf_ifdown(loopback_dev
, 2);
4288 write_lock_bh(&addrconf_hash_lock
);
4289 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4290 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4291 struct inet6_ifaddr
*bifa
;
4294 ifa
= ifa
->lst_next
;
4295 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4296 /* Do not free it; something is wrong.
4297 Now we can investigate it with debugger.
4301 write_unlock_bh(&addrconf_hash_lock
);
4303 del_timer(&addr_chk_timer
);
4307 #ifdef CONFIG_PROC_FS
4308 proc_net_remove(&init_net
, "if_inet6");