2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <net/pkt_sched.h>
78 #include <linux/if_tunnel.h>
79 #include <linux/rtnetlink.h>
81 #ifdef CONFIG_IPV6_PRIVACY
82 #include <linux/random.h>
85 #include <asm/uaccess.h>
86 #include <asm/unaligned.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
91 /* Set to 3 to get tracing... */
95 #define ADBG(x) printk x
100 #define INFINITY_LIFE_TIME 0xFFFFFFFF
101 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
104 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
105 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
107 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
111 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
116 #ifdef CONFIG_IPV6_PRIVACY
117 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
118 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
119 static void ipv6_regen_rndid(unsigned long data
);
121 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
124 static int ipv6_count_addresses(struct inet6_dev
*idev
);
127 * Configured unicast address hash table
129 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
130 static DEFINE_RWLOCK(addrconf_hash_lock
);
132 static void addrconf_verify(unsigned long);
134 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
135 static DEFINE_SPINLOCK(addrconf_verify_lock
);
137 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
138 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
140 static int addrconf_ifdown(struct net_device
*dev
, int how
);
142 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
143 static void addrconf_dad_timer(unsigned long data
);
144 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
145 static void addrconf_dad_run(struct inet6_dev
*idev
);
146 static void addrconf_rs_timer(unsigned long data
);
147 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
148 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
150 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
151 struct prefix_info
*pinfo
);
152 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
154 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
156 struct ipv6_devconf ipv6_devconf __read_mostly
= {
158 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
159 .mtu6
= IPV6_MIN_MTU
,
161 .accept_redirects
= 1,
163 .force_mld_version
= 0,
165 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
166 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
167 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
168 #ifdef CONFIG_IPV6_PRIVACY
170 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
171 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
172 .regen_max_retry
= REGEN_MAX_RETRY
,
173 .max_desync_factor
= MAX_DESYNC_FACTOR
,
175 .max_addresses
= IPV6_MAX_ADDRESSES
,
176 .accept_ra_defrtr
= 1,
177 .accept_ra_pinfo
= 1,
178 #ifdef CONFIG_IPV6_ROUTER_PREF
179 .accept_ra_rtr_pref
= 1,
180 .rtr_probe_interval
= 60 * HZ
,
181 #ifdef CONFIG_IPV6_ROUTE_INFO
182 .accept_ra_rt_info_max_plen
= 0,
186 .accept_source_route
= 0, /* we do not accept RH0 by default. */
189 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
191 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
192 .mtu6
= IPV6_MIN_MTU
,
194 .accept_redirects
= 1,
197 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
198 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
199 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
200 #ifdef CONFIG_IPV6_PRIVACY
202 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
203 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
204 .regen_max_retry
= REGEN_MAX_RETRY
,
205 .max_desync_factor
= MAX_DESYNC_FACTOR
,
207 .max_addresses
= IPV6_MAX_ADDRESSES
,
208 .accept_ra_defrtr
= 1,
209 .accept_ra_pinfo
= 1,
210 #ifdef CONFIG_IPV6_ROUTER_PREF
211 .accept_ra_rtr_pref
= 1,
212 .rtr_probe_interval
= 60 * HZ
,
213 #ifdef CONFIG_IPV6_ROUTE_INFO
214 .accept_ra_rt_info_max_plen
= 0,
218 .accept_source_route
= 0, /* we do not accept RH0 by default. */
221 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
222 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
223 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
225 /* Check if a valid qdisc is available */
226 static inline int addrconf_qdisc_ok(struct net_device
*dev
)
228 return (dev
->qdisc
!= &noop_qdisc
);
231 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
233 if (del_timer(&ifp
->timer
))
237 enum addrconf_timer_t
244 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
245 enum addrconf_timer_t what
,
248 if (!del_timer(&ifp
->timer
))
253 ifp
->timer
.function
= addrconf_dad_timer
;
256 ifp
->timer
.function
= addrconf_rs_timer
;
260 ifp
->timer
.expires
= jiffies
+ when
;
261 add_timer(&ifp
->timer
);
264 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
266 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
267 sizeof(struct ipstats_mib
)) < 0)
269 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
270 sizeof(struct icmpv6_mib
)) < 0)
272 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
273 sizeof(struct icmpv6msg_mib
)) < 0)
279 snmp_mib_free((void **)idev
->stats
.icmpv6
);
281 snmp_mib_free((void **)idev
->stats
.ipv6
);
286 static void snmp6_free_dev(struct inet6_dev
*idev
)
288 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
289 snmp_mib_free((void **)idev
->stats
.icmpv6
);
290 snmp_mib_free((void **)idev
->stats
.ipv6
);
293 /* Nobody refers to this device, we may destroy it. */
295 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
297 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
301 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
303 struct net_device
*dev
= idev
->dev
;
304 BUG_TRAP(idev
->addr_list
==NULL
);
305 BUG_TRAP(idev
->mc_list
==NULL
);
306 #ifdef NET_REFCNT_DEBUG
307 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
311 printk("Freeing alive inet6 device %p\n", idev
);
314 snmp6_free_dev(idev
);
315 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
318 EXPORT_SYMBOL(in6_dev_finish_destroy
);
320 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
322 struct inet6_dev
*ndev
;
323 struct in6_addr maddr
;
327 if (dev
->mtu
< IPV6_MIN_MTU
)
330 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
335 rwlock_init(&ndev
->lock
);
337 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
338 ndev
->cnf
.mtu6
= dev
->mtu
;
339 ndev
->cnf
.sysctl
= NULL
;
340 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
341 if (ndev
->nd_parms
== NULL
) {
345 /* We refer to the device */
348 if (snmp6_alloc_dev(ndev
) < 0) {
350 "%s(): cannot allocate memory for statistics; dev=%s.\n",
351 __FUNCTION__
, dev
->name
));
352 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
354 in6_dev_finish_destroy(ndev
);
358 if (snmp6_register_dev(ndev
) < 0) {
360 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
361 __FUNCTION__
, dev
->name
));
362 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
364 in6_dev_finish_destroy(ndev
);
368 /* One reference from device. We must do this before
369 * we invoke __ipv6_regen_rndid().
373 #ifdef CONFIG_IPV6_PRIVACY
374 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
375 if ((dev
->flags
&IFF_LOOPBACK
) ||
376 dev
->type
== ARPHRD_TUNNEL
||
377 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
378 dev
->type
== ARPHRD_SIT
||
380 dev
->type
== ARPHRD_NONE
) {
382 "%s: Disabled Privacy Extensions\n",
384 ndev
->cnf
.use_tempaddr
= -1;
386 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
388 "%s: Disabled Multicast RS\n",
390 ndev
->cnf
.rtr_solicits
= 0;
394 ipv6_regen_rndid((unsigned long) ndev
);
398 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
399 ndev
->if_flags
|= IF_READY
;
401 ipv6_mc_init_dev(ndev
);
402 ndev
->tstamp
= jiffies
;
403 addrconf_sysctl_register(ndev
);
404 /* protected by rtnl_lock */
405 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
407 /* Join all-node multicast group */
408 ipv6_addr_all_nodes(&maddr
);
409 ipv6_dev_mc_inc(dev
, &maddr
);
414 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
416 struct inet6_dev
*idev
;
420 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
421 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
425 if (dev
->flags
&IFF_UP
)
431 static void dev_forward_change(struct inet6_dev
*idev
)
433 struct net_device
*dev
;
434 struct inet6_ifaddr
*ifa
;
435 struct in6_addr addr
;
440 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
441 ipv6_addr_all_routers(&addr
);
443 if (idev
->cnf
.forwarding
)
444 ipv6_dev_mc_inc(dev
, &addr
);
446 ipv6_dev_mc_dec(dev
, &addr
);
448 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
449 if (ifa
->flags
&IFA_F_TENTATIVE
)
451 if (idev
->cnf
.forwarding
)
452 addrconf_join_anycast(ifa
);
454 addrconf_leave_anycast(ifa
);
459 static void addrconf_forward_change(void)
461 struct net_device
*dev
;
462 struct inet6_dev
*idev
;
464 read_lock(&dev_base_lock
);
465 for_each_netdev(&init_net
, dev
) {
467 idev
= __in6_dev_get(dev
);
469 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
470 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
472 dev_forward_change(idev
);
476 read_unlock(&dev_base_lock
);
479 static void addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
481 if (p
== &ipv6_devconf_dflt
.forwarding
)
484 if (p
== &ipv6_devconf
.forwarding
) {
485 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
486 addrconf_forward_change();
487 } else if ((!*p
) ^ (!old
))
488 dev_forward_change((struct inet6_dev
*)table
->extra1
);
491 rt6_purge_dflt_routers();
495 /* Nobody refers to this ifaddr, destroy it */
497 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
499 BUG_TRAP(ifp
->if_next
==NULL
);
500 BUG_TRAP(ifp
->lst_next
==NULL
);
501 #ifdef NET_REFCNT_DEBUG
502 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
505 in6_dev_put(ifp
->idev
);
507 if (del_timer(&ifp
->timer
))
508 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
511 printk("Freeing alive inet6 address %p\n", ifp
);
514 dst_release(&ifp
->rt
->u
.dst
);
520 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
522 struct inet6_ifaddr
*ifa
, **ifap
;
523 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
526 * Each device address list is sorted in order of scope -
527 * global before linklocal.
529 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
530 ifap
= &ifa
->if_next
) {
531 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
535 ifp
->if_next
= *ifap
;
539 /* On success it returns ifp with increased reference count */
541 static struct inet6_ifaddr
*
542 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
543 int scope
, u32 flags
)
545 struct inet6_ifaddr
*ifa
= NULL
;
552 err
= -ENODEV
; /*XXX*/
556 write_lock(&addrconf_hash_lock
);
558 /* Ignore adding duplicate addresses on an interface */
559 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
560 ADBG(("ipv6_add_addr: already assigned\n"));
565 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
568 ADBG(("ipv6_add_addr: malloc failed\n"));
573 rt
= addrconf_dst_alloc(idev
, addr
, 0);
579 ipv6_addr_copy(&ifa
->addr
, addr
);
581 spin_lock_init(&ifa
->lock
);
582 init_timer(&ifa
->timer
);
583 ifa
->timer
.data
= (unsigned long) ifa
;
585 ifa
->prefix_len
= pfxlen
;
586 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
587 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
592 * part one of RFC 4429, section 3.3
593 * We should not configure an address as
594 * optimistic if we do not yet know the link
595 * layer address of our nexhop router
598 if (rt
->rt6i_nexthop
== NULL
)
599 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
606 /* Add to big hash table */
607 hash
= ipv6_addr_hash(addr
);
609 ifa
->lst_next
= inet6_addr_lst
[hash
];
610 inet6_addr_lst
[hash
] = ifa
;
612 write_unlock(&addrconf_hash_lock
);
614 write_lock(&idev
->lock
);
615 /* Add to inet6_dev unicast addr list. */
616 ipv6_link_dev_addr(idev
, ifa
);
618 #ifdef CONFIG_IPV6_PRIVACY
619 if (ifa
->flags
&IFA_F_TEMPORARY
) {
620 ifa
->tmp_next
= idev
->tempaddr_list
;
621 idev
->tempaddr_list
= ifa
;
627 write_unlock(&idev
->lock
);
629 rcu_read_unlock_bh();
631 if (likely(err
== 0))
632 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
640 write_unlock(&addrconf_hash_lock
);
644 /* This function wants to get referenced ifp and releases it before return */
646 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
648 struct inet6_ifaddr
*ifa
, **ifap
;
649 struct inet6_dev
*idev
= ifp
->idev
;
651 int deleted
= 0, onlink
= 0;
652 unsigned long expires
= jiffies
;
654 hash
= ipv6_addr_hash(&ifp
->addr
);
658 write_lock_bh(&addrconf_hash_lock
);
659 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
660 ifap
= &ifa
->lst_next
) {
662 *ifap
= ifa
->lst_next
;
664 ifa
->lst_next
= NULL
;
668 write_unlock_bh(&addrconf_hash_lock
);
670 write_lock_bh(&idev
->lock
);
671 #ifdef CONFIG_IPV6_PRIVACY
672 if (ifp
->flags
&IFA_F_TEMPORARY
) {
673 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
674 ifap
= &ifa
->tmp_next
) {
676 *ifap
= ifa
->tmp_next
;
678 in6_ifa_put(ifp
->ifpub
);
682 ifa
->tmp_next
= NULL
;
689 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
691 *ifap
= ifa
->if_next
;
694 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
698 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
699 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
701 if (ifa
->flags
& IFA_F_PERMANENT
) {
706 unsigned long lifetime
;
711 spin_lock(&ifa
->lock
);
712 lifetime
= min_t(unsigned long,
713 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
714 if (time_before(expires
,
715 ifa
->tstamp
+ lifetime
* HZ
))
716 expires
= ifa
->tstamp
+ lifetime
* HZ
;
717 spin_unlock(&ifa
->lock
);
721 ifap
= &ifa
->if_next
;
723 write_unlock_bh(&idev
->lock
);
725 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
727 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
729 addrconf_del_timer(ifp
);
732 * Purge or update corresponding prefix
734 * 1) we don't purge prefix here if address was not permanent.
735 * prefix is managed by its own lifetime.
736 * 2) if there're no addresses, delete prefix.
737 * 3) if there're still other permanent address(es),
738 * corresponding prefix is still permanent.
739 * 4) otherwise, update prefix lifetime to the
740 * longest valid lifetime among the corresponding
741 * addresses on the device.
742 * Note: subsequent RA will update lifetime.
746 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
747 struct in6_addr prefix
;
750 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
751 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
753 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
757 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
758 rt
->rt6i_expires
= expires
;
759 rt
->rt6i_flags
|= RTF_EXPIRES
;
762 dst_release(&rt
->u
.dst
);
768 #ifdef CONFIG_IPV6_PRIVACY
769 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
771 struct inet6_dev
*idev
= ifp
->idev
;
772 struct in6_addr addr
, *tmpaddr
;
773 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
779 write_lock(&idev
->lock
);
781 spin_lock_bh(&ift
->lock
);
782 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
783 spin_unlock_bh(&ift
->lock
);
790 if (idev
->cnf
.use_tempaddr
<= 0) {
791 write_unlock(&idev
->lock
);
793 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
798 spin_lock_bh(&ifp
->lock
);
799 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
800 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
801 spin_unlock_bh(&ifp
->lock
);
802 write_unlock(&idev
->lock
);
804 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
810 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
811 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
812 spin_unlock_bh(&ifp
->lock
);
813 write_unlock(&idev
->lock
);
815 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
821 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
822 tmp_valid_lft
= min_t(__u32
,
824 idev
->cnf
.temp_valid_lft
);
825 tmp_prefered_lft
= min_t(__u32
,
827 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
828 tmp_plen
= ifp
->prefix_len
;
829 max_addresses
= idev
->cnf
.max_addresses
;
830 tmp_cstamp
= ifp
->cstamp
;
831 tmp_tstamp
= ifp
->tstamp
;
832 spin_unlock_bh(&ifp
->lock
);
834 write_unlock(&idev
->lock
);
836 addr_flags
= IFA_F_TEMPORARY
;
837 /* set in addrconf_prefix_rcv() */
838 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
839 addr_flags
|= IFA_F_OPTIMISTIC
;
841 ift
= !max_addresses
||
842 ipv6_count_addresses(idev
) < max_addresses
?
843 ipv6_add_addr(idev
, &addr
, tmp_plen
,
844 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
846 if (!ift
|| IS_ERR(ift
)) {
850 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
852 write_lock(&idev
->lock
);
856 spin_lock_bh(&ift
->lock
);
858 ift
->valid_lft
= tmp_valid_lft
;
859 ift
->prefered_lft
= tmp_prefered_lft
;
860 ift
->cstamp
= tmp_cstamp
;
861 ift
->tstamp
= tmp_tstamp
;
862 spin_unlock_bh(&ift
->lock
);
864 addrconf_dad_start(ift
, 0);
873 * Choose an appropriate source address (RFC3484)
875 struct ipv6_saddr_score
{
883 #define IPV6_SADDR_SCORE_LOCAL 0x0001
884 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
885 #define IPV6_SADDR_SCORE_HOA 0x0008
886 #define IPV6_SADDR_SCORE_OIF 0x0010
887 #define IPV6_SADDR_SCORE_LABEL 0x0020
888 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
890 static inline int ipv6_saddr_preferred(int type
)
892 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
893 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
898 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
899 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
901 struct ipv6_saddr_score hiscore
;
902 struct inet6_ifaddr
*ifa_result
= NULL
;
903 int daddr_type
= __ipv6_addr_type(daddr
);
904 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
905 int daddr_ifindex
= daddr_dev
? daddr_dev
->ifindex
: 0;
906 u32 daddr_label
= ipv6_addr_label(daddr
, daddr_type
, daddr_ifindex
);
907 struct net_device
*dev
;
909 memset(&hiscore
, 0, sizeof(hiscore
));
911 read_lock(&dev_base_lock
);
914 for_each_netdev(&init_net
, dev
) {
915 struct inet6_dev
*idev
;
916 struct inet6_ifaddr
*ifa
;
918 /* Rule 0: Candidate Source Address (section 4)
919 * - multicast and link-local destination address,
920 * the set of candidate source address MUST only
921 * include addresses assigned to interfaces
922 * belonging to the same link as the outgoing
924 * (- For site-local destination addresses, the
925 * set of candidate source addresses MUST only
926 * include addresses assigned to interfaces
927 * belonging to the same site as the outgoing
930 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
931 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
932 daddr_dev
&& dev
!= daddr_dev
)
935 idev
= __in6_dev_get(dev
);
939 read_lock_bh(&idev
->lock
);
940 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
941 struct ipv6_saddr_score score
;
943 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
946 * - Tentative Address (RFC2462 section 5.4)
947 * - A tentative address is not considered
948 * "assigned to an interface" in the traditional
949 * sense, unless it is also flagged as optimistic.
950 * - Candidate Source Address (section 4)
951 * - In any case, anycast addresses, multicast
952 * addresses, and the unspecified address MUST
953 * NOT be included in a candidate set.
955 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
956 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
958 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
959 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
960 LIMIT_NETDEBUG(KERN_DEBUG
961 "ADDRCONF: unspecified / multicast address "
962 "assigned as unicast address on %s",
972 if (ifa_result
== NULL
) {
973 /* record it if the first available entry */
977 /* Rule 1: Prefer same address */
978 if (hiscore
.rule
< 1) {
979 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
980 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
983 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
984 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
985 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
990 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
994 /* Rule 2: Prefer appropriate scope */
995 if (hiscore
.rule
< 2) {
996 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
999 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
1000 if (hiscore
.scope
< score
.scope
) {
1001 if (hiscore
.scope
< daddr_scope
) {
1006 } else if (score
.scope
< hiscore
.scope
) {
1007 if (score
.scope
< daddr_scope
)
1008 break; /* addresses sorted by scope */
1015 /* Rule 3: Avoid deprecated and optimistic addresses */
1016 if (hiscore
.rule
< 3) {
1017 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1018 (((ifa_result
->flags
&
1019 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1020 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1023 if (ipv6_saddr_preferred(score
.addr_type
) ||
1025 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1026 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1027 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1032 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1036 /* Rule 4: Prefer home address */
1037 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1038 if (hiscore
.rule
< 4) {
1039 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1040 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1043 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1044 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1045 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1050 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1054 if (hiscore
.rule
< 4)
1058 /* Rule 5: Prefer outgoing interface */
1059 if (hiscore
.rule
< 5) {
1060 if (daddr_dev
== NULL
||
1061 daddr_dev
== ifa_result
->idev
->dev
)
1062 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1065 if (daddr_dev
== NULL
||
1066 daddr_dev
== ifa
->idev
->dev
) {
1067 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1068 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1073 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1077 /* Rule 6: Prefer matching label */
1078 if (hiscore
.rule
< 6) {
1079 if (ipv6_addr_label(&ifa_result
->addr
,
1081 ifa_result
->idev
->dev
->ifindex
) == daddr_label
)
1082 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1085 if (ipv6_addr_label(&ifa
->addr
,
1087 ifa
->idev
->dev
->ifindex
) == daddr_label
) {
1088 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1089 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1094 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1098 #ifdef CONFIG_IPV6_PRIVACY
1099 /* Rule 7: Prefer public address
1100 * Note: prefer temprary address if use_tempaddr >= 2
1102 if (hiscore
.rule
< 7) {
1103 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1104 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1105 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1108 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1109 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1110 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1111 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1116 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1120 if (hiscore
.rule
< 7)
1123 /* Rule 8: Use longest matching prefix */
1124 if (hiscore
.rule
< 8) {
1125 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1128 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1129 if (score
.matchlen
> hiscore
.matchlen
) {
1134 else if (score
.matchlen
< hiscore
.matchlen
)
1138 /* Final Rule: choose first available one */
1142 in6_ifa_put(ifa_result
);
1147 read_unlock_bh(&idev
->lock
);
1150 read_unlock(&dev_base_lock
);
1153 return -EADDRNOTAVAIL
;
1155 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1156 in6_ifa_put(ifa_result
);
1161 int ipv6_get_saddr(struct dst_entry
*dst
,
1162 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1164 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1167 EXPORT_SYMBOL(ipv6_get_saddr
);
1169 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1170 unsigned char banned_flags
)
1172 struct inet6_dev
*idev
;
1173 int err
= -EADDRNOTAVAIL
;
1176 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1177 struct inet6_ifaddr
*ifp
;
1179 read_lock_bh(&idev
->lock
);
1180 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1181 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1182 ipv6_addr_copy(addr
, &ifp
->addr
);
1187 read_unlock_bh(&idev
->lock
);
1193 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1196 struct inet6_ifaddr
*ifp
;
1198 read_lock_bh(&idev
->lock
);
1199 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1201 read_unlock_bh(&idev
->lock
);
1205 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1207 struct inet6_ifaddr
* ifp
;
1208 u8 hash
= ipv6_addr_hash(addr
);
1210 read_lock_bh(&addrconf_hash_lock
);
1211 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1212 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1213 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1214 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1215 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1219 read_unlock_bh(&addrconf_hash_lock
);
1223 EXPORT_SYMBOL(ipv6_chk_addr
);
1226 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1228 struct inet6_ifaddr
* ifp
;
1229 u8 hash
= ipv6_addr_hash(addr
);
1231 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1232 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1233 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1240 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1242 struct inet6_ifaddr
* ifp
;
1243 u8 hash
= ipv6_addr_hash(addr
);
1245 read_lock_bh(&addrconf_hash_lock
);
1246 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1247 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1248 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1249 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1255 read_unlock_bh(&addrconf_hash_lock
);
1260 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1262 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1263 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1264 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1265 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1266 int sk_ipv6only
= ipv6_only_sock(sk
);
1267 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1268 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1269 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1271 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1274 if (addr_type2
== IPV6_ADDR_ANY
&&
1275 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1278 if (addr_type
== IPV6_ADDR_ANY
&&
1279 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1282 if (sk2_rcv_saddr6
&&
1283 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1286 if (addr_type
== IPV6_ADDR_MAPPED
&&
1288 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1294 /* Gets referenced address, destroys ifaddr */
1296 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1298 if (ifp
->flags
&IFA_F_PERMANENT
) {
1299 spin_lock_bh(&ifp
->lock
);
1300 addrconf_del_timer(ifp
);
1301 ifp
->flags
|= IFA_F_TENTATIVE
;
1302 spin_unlock_bh(&ifp
->lock
);
1304 #ifdef CONFIG_IPV6_PRIVACY
1305 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1306 struct inet6_ifaddr
*ifpub
;
1307 spin_lock_bh(&ifp
->lock
);
1310 in6_ifa_hold(ifpub
);
1311 spin_unlock_bh(&ifp
->lock
);
1312 ipv6_create_tempaddr(ifpub
, ifp
);
1315 spin_unlock_bh(&ifp
->lock
);
1323 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1325 if (net_ratelimit())
1326 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1327 addrconf_dad_stop(ifp
);
1330 /* Join to solicited addr multicast group. */
1332 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1334 struct in6_addr maddr
;
1336 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1339 addrconf_addr_solict_mult(addr
, &maddr
);
1340 ipv6_dev_mc_inc(dev
, &maddr
);
1343 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1345 struct in6_addr maddr
;
1347 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1350 addrconf_addr_solict_mult(addr
, &maddr
);
1351 __ipv6_dev_mc_dec(idev
, &maddr
);
1354 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1356 struct in6_addr addr
;
1357 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1358 if (ipv6_addr_any(&addr
))
1360 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1363 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1365 struct in6_addr addr
;
1366 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1367 if (ipv6_addr_any(&addr
))
1369 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1372 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1374 if (dev
->addr_len
!= ETH_ALEN
)
1376 memcpy(eui
, dev
->dev_addr
, 3);
1377 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1380 * The zSeries OSA network cards can be shared among various
1381 * OS instances, but the OSA cards have only one MAC address.
1382 * This leads to duplicate address conflicts in conjunction
1383 * with IPv6 if more than one instance uses the same card.
1385 * The driver for these cards can deliver a unique 16-bit
1386 * identifier for each instance sharing the same card. It is
1387 * placed instead of 0xFFFE in the interface identifier. The
1388 * "u" bit of the interface identifier is not inverted in this
1389 * case. Hence the resulting interface identifier has local
1390 * scope according to RFC2373.
1393 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1394 eui
[4] = dev
->dev_id
& 0xFF;
1403 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1405 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1406 if (dev
->addr_len
!= ARCNET_ALEN
)
1409 eui
[7] = *(u8
*)dev
->dev_addr
;
1413 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1415 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1417 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1422 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1424 switch (dev
->type
) {
1427 case ARPHRD_IEEE802_TR
:
1428 return addrconf_ifid_eui48(eui
, dev
);
1430 return addrconf_ifid_arcnet(eui
, dev
);
1431 case ARPHRD_INFINIBAND
:
1432 return addrconf_ifid_infiniband(eui
, dev
);
1434 if (dev
->priv_flags
& IFF_ISATAP
)
1435 return ipv6_isatap_eui64(eui
, *(__be32
*)dev
->dev_addr
);
1440 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1443 struct inet6_ifaddr
*ifp
;
1445 read_lock_bh(&idev
->lock
);
1446 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1447 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1448 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1453 read_unlock_bh(&idev
->lock
);
1457 #ifdef CONFIG_IPV6_PRIVACY
1458 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1459 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1462 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1463 idev
->rndid
[0] &= ~0x02;
1466 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1467 * check if generated address is not inappropriate
1469 * - Reserved subnet anycast (RFC 2526)
1470 * 11111101 11....11 1xxxxxxx
1471 * - ISATAP (RFC4214) 6.1
1472 * 00-00-5E-FE-xx-xx-xx-xx
1474 * - XXX: already assigned to an address on the device
1476 if (idev
->rndid
[0] == 0xfd &&
1477 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1478 (idev
->rndid
[7]&0x80))
1480 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1481 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1483 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1490 static void ipv6_regen_rndid(unsigned long data
)
1492 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1493 unsigned long expires
;
1496 write_lock_bh(&idev
->lock
);
1501 if (__ipv6_regen_rndid(idev
) < 0)
1505 idev
->cnf
.temp_prefered_lft
* HZ
-
1506 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1507 if (time_before(expires
, jiffies
)) {
1509 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1514 if (!mod_timer(&idev
->regen_timer
, expires
))
1518 write_unlock_bh(&idev
->lock
);
1519 rcu_read_unlock_bh();
1523 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1526 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1527 ret
= __ipv6_regen_rndid(idev
);
1537 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1538 unsigned long expires
, u32 flags
)
1540 struct fib6_config cfg
= {
1541 .fc_table
= RT6_TABLE_PREFIX
,
1542 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1543 .fc_ifindex
= dev
->ifindex
,
1544 .fc_expires
= expires
,
1546 .fc_flags
= RTF_UP
| flags
,
1549 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1551 /* Prevent useless cloning on PtP SIT.
1552 This thing is done here expecting that the whole
1553 class of non-broadcast devices need not cloning.
1555 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1556 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1557 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1560 ip6_route_add(&cfg
);
1563 /* Create "default" multicast route to the interface */
1565 static void addrconf_add_mroute(struct net_device
*dev
)
1567 struct fib6_config cfg
= {
1568 .fc_table
= RT6_TABLE_LOCAL
,
1569 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1570 .fc_ifindex
= dev
->ifindex
,
1575 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1577 ip6_route_add(&cfg
);
1580 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1581 static void sit_route_add(struct net_device
*dev
)
1583 struct fib6_config cfg
= {
1584 .fc_table
= RT6_TABLE_MAIN
,
1585 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1586 .fc_ifindex
= dev
->ifindex
,
1588 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1591 /* prefix length - 96 bits "::d.d.d.d" */
1592 ip6_route_add(&cfg
);
1596 static void addrconf_add_lroute(struct net_device
*dev
)
1598 struct in6_addr addr
;
1600 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1601 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1604 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1606 struct inet6_dev
*idev
;
1610 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1613 /* Add default multicast route */
1614 addrconf_add_mroute(dev
);
1616 /* Add link local route */
1617 addrconf_add_lroute(dev
);
1621 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1623 struct prefix_info
*pinfo
;
1627 unsigned long rt_expires
;
1628 struct inet6_dev
*in6_dev
;
1630 pinfo
= (struct prefix_info
*) opt
;
1632 if (len
< sizeof(struct prefix_info
)) {
1633 ADBG(("addrconf: prefix option too short\n"));
1638 * Validation checks ([ADDRCONF], page 19)
1641 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1643 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1646 valid_lft
= ntohl(pinfo
->valid
);
1647 prefered_lft
= ntohl(pinfo
->prefered
);
1649 if (prefered_lft
> valid_lft
) {
1650 if (net_ratelimit())
1651 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1655 in6_dev
= in6_dev_get(dev
);
1657 if (in6_dev
== NULL
) {
1658 if (net_ratelimit())
1659 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1664 * Two things going on here:
1665 * 1) Add routes for on-link prefixes
1666 * 2) Configure prefixes with the auto flag set
1669 /* Avoid arithmetic overflow. Really, we could
1670 save rt_expires in seconds, likely valid_lft,
1671 but it would require division in fib gc, that it
1674 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1675 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1677 rt_expires
= valid_lft
* HZ
;
1680 * We convert this (in jiffies) to clock_t later.
1681 * Avoid arithmetic overflow there as well.
1682 * Overflow can happen only if HZ < USER_HZ.
1684 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1685 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1687 if (pinfo
->onlink
) {
1688 struct rt6_info
*rt
;
1689 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1691 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1692 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1693 if (valid_lft
== 0) {
1697 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1700 } else if (valid_lft
) {
1701 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1702 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1705 dst_release(&rt
->u
.dst
);
1708 /* Try to figure out our local address for this prefix */
1710 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1711 struct inet6_ifaddr
* ifp
;
1712 struct in6_addr addr
;
1713 int create
= 0, update_lft
= 0;
1715 if (pinfo
->prefix_len
== 64) {
1716 memcpy(&addr
, &pinfo
->prefix
, 8);
1717 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1718 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1719 in6_dev_put(in6_dev
);
1724 if (net_ratelimit())
1725 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1727 in6_dev_put(in6_dev
);
1732 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1734 if (ifp
== NULL
&& valid_lft
) {
1735 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1738 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1739 if (in6_dev
->cnf
.optimistic_dad
&&
1740 !ipv6_devconf
.forwarding
)
1741 addr_flags
= IFA_F_OPTIMISTIC
;
1744 /* Do not allow to create too much of autoconfigured
1745 * addresses; this would be too easy way to crash kernel.
1747 if (!max_addresses
||
1748 ipv6_count_addresses(in6_dev
) < max_addresses
)
1749 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1750 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1753 if (!ifp
|| IS_ERR(ifp
)) {
1754 in6_dev_put(in6_dev
);
1758 update_lft
= create
= 1;
1759 ifp
->cstamp
= jiffies
;
1760 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1766 #ifdef CONFIG_IPV6_PRIVACY
1767 struct inet6_ifaddr
*ift
;
1771 /* update lifetime (RFC2462 5.5.3 e) */
1772 spin_lock(&ifp
->lock
);
1774 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1775 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1778 if (!update_lft
&& stored_lft
) {
1779 if (valid_lft
> MIN_VALID_LIFETIME
||
1780 valid_lft
> stored_lft
)
1782 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1783 /* valid_lft <= stored_lft is always true */
1787 valid_lft
= MIN_VALID_LIFETIME
;
1788 if (valid_lft
< prefered_lft
)
1789 prefered_lft
= valid_lft
;
1795 ifp
->valid_lft
= valid_lft
;
1796 ifp
->prefered_lft
= prefered_lft
;
1799 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1800 spin_unlock(&ifp
->lock
);
1802 if (!(flags
&IFA_F_TENTATIVE
))
1803 ipv6_ifa_notify(0, ifp
);
1805 spin_unlock(&ifp
->lock
);
1807 #ifdef CONFIG_IPV6_PRIVACY
1808 read_lock_bh(&in6_dev
->lock
);
1809 /* update all temporary addresses in the list */
1810 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1812 * When adjusting the lifetimes of an existing
1813 * temporary address, only lower the lifetimes.
1814 * Implementations must not increase the
1815 * lifetimes of an existing temporary address
1816 * when processing a Prefix Information Option.
1818 spin_lock(&ift
->lock
);
1820 if (ift
->valid_lft
> valid_lft
&&
1821 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1822 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1823 if (ift
->prefered_lft
> prefered_lft
&&
1824 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1825 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1826 spin_unlock(&ift
->lock
);
1827 if (!(flags
&IFA_F_TENTATIVE
))
1828 ipv6_ifa_notify(0, ift
);
1831 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1833 * When a new public address is created as described in [ADDRCONF],
1834 * also create a new temporary address.
1836 read_unlock_bh(&in6_dev
->lock
);
1837 ipv6_create_tempaddr(ifp
, NULL
);
1839 read_unlock_bh(&in6_dev
->lock
);
1846 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1847 in6_dev_put(in6_dev
);
1851 * Set destination address.
1852 * Special case for SIT interfaces where we create a new "virtual"
1855 int addrconf_set_dstaddr(void __user
*arg
)
1857 struct in6_ifreq ireq
;
1858 struct net_device
*dev
;
1864 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1867 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1873 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1874 if (dev
->type
== ARPHRD_SIT
) {
1877 struct ip_tunnel_parm p
;
1879 err
= -EADDRNOTAVAIL
;
1880 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1883 memset(&p
, 0, sizeof(p
));
1884 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1888 p
.iph
.protocol
= IPPROTO_IPV6
;
1890 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1892 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1893 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1898 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1900 err
= dev_open(dev
);
1911 * Manual configuration of address on an interface
1913 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1914 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1916 struct inet6_ifaddr
*ifp
;
1917 struct inet6_dev
*idev
;
1918 struct net_device
*dev
;
1920 u32 flags
= RTF_EXPIRES
;
1924 /* check the lifetime */
1925 if (!valid_lft
|| prefered_lft
> valid_lft
)
1928 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1931 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1934 scope
= ipv6_addr_scope(pfx
);
1936 if (valid_lft
== INFINITY_LIFE_TIME
) {
1937 ifa_flags
|= IFA_F_PERMANENT
;
1939 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1940 valid_lft
= 0x7FFFFFFF/HZ
;
1942 if (prefered_lft
== 0)
1943 ifa_flags
|= IFA_F_DEPRECATED
;
1944 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1945 (prefered_lft
!= INFINITY_LIFE_TIME
))
1946 prefered_lft
= 0x7FFFFFFF/HZ
;
1948 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1951 spin_lock_bh(&ifp
->lock
);
1952 ifp
->valid_lft
= valid_lft
;
1953 ifp
->prefered_lft
= prefered_lft
;
1954 ifp
->tstamp
= jiffies
;
1955 spin_unlock_bh(&ifp
->lock
);
1957 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1958 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1960 * Note that section 3.1 of RFC 4429 indicates
1961 * that the Optimistic flag should not be set for
1962 * manually configured addresses
1964 addrconf_dad_start(ifp
, 0);
1970 return PTR_ERR(ifp
);
1973 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1975 struct inet6_ifaddr
*ifp
;
1976 struct inet6_dev
*idev
;
1977 struct net_device
*dev
;
1979 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1982 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1985 read_lock_bh(&idev
->lock
);
1986 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1987 if (ifp
->prefix_len
== plen
&&
1988 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1990 read_unlock_bh(&idev
->lock
);
1994 /* If the last address is deleted administratively,
1995 disable IPv6 on this interface.
1997 if (idev
->addr_list
== NULL
)
1998 addrconf_ifdown(idev
->dev
, 1);
2002 read_unlock_bh(&idev
->lock
);
2003 return -EADDRNOTAVAIL
;
2007 int addrconf_add_ifaddr(void __user
*arg
)
2009 struct in6_ifreq ireq
;
2012 if (!capable(CAP_NET_ADMIN
))
2015 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2019 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
2020 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2025 int addrconf_del_ifaddr(void __user
*arg
)
2027 struct in6_ifreq ireq
;
2030 if (!capable(CAP_NET_ADMIN
))
2033 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2037 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2042 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2043 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2045 struct inet6_ifaddr
* ifp
;
2046 struct in6_addr addr
;
2047 struct net_device
*dev
;
2052 memset(&addr
, 0, sizeof(struct in6_addr
));
2053 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2055 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2056 addr
.s6_addr32
[0] = htonl(0xfe800000);
2059 scope
= IPV6_ADDR_COMPATv4
;
2062 if (addr
.s6_addr32
[3]) {
2063 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2065 spin_lock_bh(&ifp
->lock
);
2066 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2067 spin_unlock_bh(&ifp
->lock
);
2068 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2074 for_each_netdev(&init_net
, dev
) {
2075 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2076 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2077 struct in_ifaddr
* ifa
;
2081 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2084 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2086 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2088 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2089 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2093 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2098 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2101 spin_lock_bh(&ifp
->lock
);
2102 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2103 spin_unlock_bh(&ifp
->lock
);
2104 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2113 static void init_loopback(struct net_device
*dev
)
2115 struct inet6_dev
*idev
;
2116 struct inet6_ifaddr
* ifp
;
2122 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2123 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2127 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2129 spin_lock_bh(&ifp
->lock
);
2130 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2131 spin_unlock_bh(&ifp
->lock
);
2132 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2137 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2139 struct inet6_ifaddr
* ifp
;
2140 u32 addr_flags
= IFA_F_PERMANENT
;
2142 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2143 if (idev
->cnf
.optimistic_dad
&&
2144 !ipv6_devconf
.forwarding
)
2145 addr_flags
|= IFA_F_OPTIMISTIC
;
2149 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2151 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2152 addrconf_dad_start(ifp
, 0);
2157 static void addrconf_dev_config(struct net_device
*dev
)
2159 struct in6_addr addr
;
2160 struct inet6_dev
* idev
;
2164 if ((dev
->type
!= ARPHRD_ETHER
) &&
2165 (dev
->type
!= ARPHRD_FDDI
) &&
2166 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2167 (dev
->type
!= ARPHRD_ARCNET
) &&
2168 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2169 /* Alas, we support only Ethernet autoconfiguration. */
2173 idev
= addrconf_add_dev(dev
);
2177 memset(&addr
, 0, sizeof(struct in6_addr
));
2178 addr
.s6_addr32
[0] = htonl(0xFE800000);
2180 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2181 addrconf_add_linklocal(idev
, &addr
);
2184 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2185 static void addrconf_sit_config(struct net_device
*dev
)
2187 struct inet6_dev
*idev
;
2192 * Configure the tunnel with one of our IPv4
2193 * addresses... we should configure all of
2194 * our v4 addrs in the tunnel
2197 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2198 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2202 if (dev
->priv_flags
& IFF_ISATAP
) {
2203 struct in6_addr addr
;
2205 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2206 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2207 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2208 addrconf_add_linklocal(idev
, &addr
);
2212 sit_add_v4_addrs(idev
);
2214 if (dev
->flags
&IFF_POINTOPOINT
) {
2215 addrconf_add_mroute(dev
);
2216 addrconf_add_lroute(dev
);
2223 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2225 struct in6_addr lladdr
;
2227 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2228 addrconf_add_linklocal(idev
, &lladdr
);
2234 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2236 struct net_device
*link_dev
;
2238 /* first try to inherit the link-local address from the link device */
2239 if (idev
->dev
->iflink
&&
2240 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2241 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2244 /* then try to inherit it from any device */
2245 for_each_netdev(&init_net
, link_dev
) {
2246 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2249 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2253 * Autoconfigure tunnel with a link-local address so routing protocols,
2254 * DHCPv6, MLD etc. can be run over the virtual link
2257 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2259 struct inet6_dev
*idev
;
2263 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2264 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2267 ip6_tnl_add_linklocal(idev
);
2270 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2273 struct net_device
*dev
= (struct net_device
*) data
;
2274 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2275 int run_pending
= 0;
2278 if (dev
->nd_net
!= &init_net
)
2282 case NETDEV_REGISTER
:
2283 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2284 idev
= ipv6_add_dev(dev
);
2286 return notifier_from_errno(-ENOMEM
);
2291 if (dev
->flags
& IFF_SLAVE
)
2294 if (event
== NETDEV_UP
) {
2295 if (!addrconf_qdisc_ok(dev
)) {
2296 /* device is not ready yet. */
2298 "ADDRCONF(NETDEV_UP): %s: "
2299 "link is not ready\n",
2304 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2305 idev
= ipv6_add_dev(dev
);
2308 idev
->if_flags
|= IF_READY
;
2310 if (!addrconf_qdisc_ok(dev
)) {
2311 /* device is still not ready. */
2316 if (idev
->if_flags
& IF_READY
) {
2317 /* device is already configured. */
2320 idev
->if_flags
|= IF_READY
;
2324 "ADDRCONF(NETDEV_CHANGE): %s: "
2325 "link becomes ready\n",
2332 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2334 addrconf_sit_config(dev
);
2337 case ARPHRD_TUNNEL6
:
2338 addrconf_ip6_tnl_config(dev
);
2340 case ARPHRD_LOOPBACK
:
2345 addrconf_dev_config(dev
);
2350 addrconf_dad_run(idev
);
2352 /* If the MTU changed during the interface down, when the
2353 interface up, the changed MTU must be reflected in the
2354 idev as well as routers.
2356 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2357 rt6_mtu_change(dev
, dev
->mtu
);
2358 idev
->cnf
.mtu6
= dev
->mtu
;
2360 idev
->tstamp
= jiffies
;
2361 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2362 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2363 stop IPv6 on this interface.
2365 if (dev
->mtu
< IPV6_MIN_MTU
)
2366 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2370 case NETDEV_CHANGEMTU
:
2371 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2372 rt6_mtu_change(dev
, dev
->mtu
);
2373 idev
->cnf
.mtu6
= dev
->mtu
;
2377 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2378 idev
= ipv6_add_dev(dev
);
2383 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2386 case NETDEV_UNREGISTER
:
2388 * Remove all addresses from this interface.
2390 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2393 case NETDEV_CHANGENAME
:
2395 snmp6_unregister_dev(idev
);
2396 addrconf_sysctl_unregister(idev
);
2397 addrconf_sysctl_register(idev
);
2398 err
= snmp6_register_dev(idev
);
2400 return notifier_from_errno(err
);
2409 * addrconf module should be notified of a device going up
2411 static struct notifier_block ipv6_dev_notf
= {
2412 .notifier_call
= addrconf_notify
,
2416 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2418 struct inet6_dev
*idev
;
2419 struct inet6_ifaddr
*ifa
, **bifa
;
2424 if (dev
== init_net
.loopback_dev
&& how
== 1)
2428 neigh_ifdown(&nd_tbl
, dev
);
2430 idev
= __in6_dev_get(dev
);
2434 /* Step 1: remove reference to ipv6 device from parent device.
2440 /* protected by rtnl_lock */
2441 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2443 /* Step 1.5: remove snmp6 entry */
2444 snmp6_unregister_dev(idev
);
2448 /* Step 2: clear hash table */
2449 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2450 bifa
= &inet6_addr_lst
[i
];
2452 write_lock_bh(&addrconf_hash_lock
);
2453 while ((ifa
= *bifa
) != NULL
) {
2454 if (ifa
->idev
== idev
) {
2455 *bifa
= ifa
->lst_next
;
2456 ifa
->lst_next
= NULL
;
2457 addrconf_del_timer(ifa
);
2461 bifa
= &ifa
->lst_next
;
2463 write_unlock_bh(&addrconf_hash_lock
);
2466 write_lock_bh(&idev
->lock
);
2468 /* Step 3: clear flags for stateless addrconf */
2470 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2472 /* Step 4: clear address list */
2473 #ifdef CONFIG_IPV6_PRIVACY
2474 if (how
== 1 && del_timer(&idev
->regen_timer
))
2477 /* clear tempaddr list */
2478 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2479 idev
->tempaddr_list
= ifa
->tmp_next
;
2480 ifa
->tmp_next
= NULL
;
2482 write_unlock_bh(&idev
->lock
);
2483 spin_lock_bh(&ifa
->lock
);
2486 in6_ifa_put(ifa
->ifpub
);
2489 spin_unlock_bh(&ifa
->lock
);
2491 write_lock_bh(&idev
->lock
);
2494 while ((ifa
= idev
->addr_list
) != NULL
) {
2495 idev
->addr_list
= ifa
->if_next
;
2496 ifa
->if_next
= NULL
;
2498 addrconf_del_timer(ifa
);
2499 write_unlock_bh(&idev
->lock
);
2501 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2502 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2505 write_lock_bh(&idev
->lock
);
2507 write_unlock_bh(&idev
->lock
);
2509 /* Step 5: Discard multicast list */
2512 ipv6_mc_destroy_dev(idev
);
2516 idev
->tstamp
= jiffies
;
2518 /* Shot the device (if unregistered) */
2521 addrconf_sysctl_unregister(idev
);
2522 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2523 neigh_ifdown(&nd_tbl
, dev
);
2529 static void addrconf_rs_timer(unsigned long data
)
2531 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2533 if (ifp
->idev
->cnf
.forwarding
)
2536 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2538 * Announcement received after solicitation
2544 spin_lock(&ifp
->lock
);
2545 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2546 struct in6_addr all_routers
;
2548 /* The wait after the last probe can be shorter */
2549 addrconf_mod_timer(ifp
, AC_RS
,
2550 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2551 ifp
->idev
->cnf
.rtr_solicit_delay
:
2552 ifp
->idev
->cnf
.rtr_solicit_interval
);
2553 spin_unlock(&ifp
->lock
);
2555 ipv6_addr_all_routers(&all_routers
);
2557 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2559 spin_unlock(&ifp
->lock
);
2561 * Note: we do not support deprecated "all on-link"
2562 * assumption any longer.
2564 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2565 ifp
->idev
->dev
->name
);
2573 * Duplicate Address Detection
2575 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2577 unsigned long rand_num
;
2578 struct inet6_dev
*idev
= ifp
->idev
;
2580 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2583 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2585 ifp
->probes
= idev
->cnf
.dad_transmits
;
2586 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2589 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2591 struct inet6_dev
*idev
= ifp
->idev
;
2592 struct net_device
*dev
= idev
->dev
;
2594 addrconf_join_solict(dev
, &ifp
->addr
);
2596 net_srandom(ifp
->addr
.s6_addr32
[3]);
2598 read_lock_bh(&idev
->lock
);
2601 spin_lock_bh(&ifp
->lock
);
2603 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2604 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2605 ifp
->flags
& IFA_F_NODAD
) {
2606 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2607 spin_unlock_bh(&ifp
->lock
);
2608 read_unlock_bh(&idev
->lock
);
2610 addrconf_dad_completed(ifp
);
2614 if (!(idev
->if_flags
& IF_READY
)) {
2615 spin_unlock_bh(&ifp
->lock
);
2616 read_unlock_bh(&idev
->lock
);
2618 * If the defice is not ready:
2619 * - keep it tentative if it is a permanent address.
2620 * - otherwise, kill it.
2623 addrconf_dad_stop(ifp
);
2628 * Optimistic nodes can start receiving
2631 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2632 ip6_ins_rt(ifp
->rt
);
2634 addrconf_dad_kick(ifp
);
2635 spin_unlock_bh(&ifp
->lock
);
2637 read_unlock_bh(&idev
->lock
);
2640 static void addrconf_dad_timer(unsigned long data
)
2642 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2643 struct inet6_dev
*idev
= ifp
->idev
;
2644 struct in6_addr unspec
;
2645 struct in6_addr mcaddr
;
2647 read_lock_bh(&idev
->lock
);
2649 read_unlock_bh(&idev
->lock
);
2652 spin_lock_bh(&ifp
->lock
);
2653 if (ifp
->probes
== 0) {
2655 * DAD was successful
2658 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2659 spin_unlock_bh(&ifp
->lock
);
2660 read_unlock_bh(&idev
->lock
);
2662 addrconf_dad_completed(ifp
);
2668 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2669 spin_unlock_bh(&ifp
->lock
);
2670 read_unlock_bh(&idev
->lock
);
2672 /* send a neighbour solicitation for our addr */
2673 memset(&unspec
, 0, sizeof(unspec
));
2674 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2675 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2680 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2682 struct net_device
* dev
= ifp
->idev
->dev
;
2685 * Configure the address for reception. Now it is valid.
2688 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2690 /* If added prefix is link local and forwarding is off,
2691 start sending router solicitations.
2694 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2695 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2696 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2697 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2698 struct in6_addr all_routers
;
2700 ipv6_addr_all_routers(&all_routers
);
2703 * If a host as already performed a random delay
2704 * [...] as part of DAD [...] there is no need
2705 * to delay again before sending the first RS
2707 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2709 spin_lock_bh(&ifp
->lock
);
2711 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2712 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2713 spin_unlock_bh(&ifp
->lock
);
2717 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2718 struct inet6_ifaddr
*ifp
;
2720 read_lock_bh(&idev
->lock
);
2721 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2722 spin_lock_bh(&ifp
->lock
);
2723 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2724 spin_unlock_bh(&ifp
->lock
);
2727 spin_unlock_bh(&ifp
->lock
);
2728 addrconf_dad_kick(ifp
);
2730 read_unlock_bh(&idev
->lock
);
2733 #ifdef CONFIG_PROC_FS
2734 struct if6_iter_state
{
2738 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2740 struct inet6_ifaddr
*ifa
= NULL
;
2741 struct if6_iter_state
*state
= seq
->private;
2743 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2744 ifa
= inet6_addr_lst
[state
->bucket
];
2751 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2753 struct if6_iter_state
*state
= seq
->private;
2755 ifa
= ifa
->lst_next
;
2757 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2758 ifa
= inet6_addr_lst
[state
->bucket
];
2764 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2766 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2769 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2771 return pos
? NULL
: ifa
;
2774 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2776 read_lock_bh(&addrconf_hash_lock
);
2777 return if6_get_idx(seq
, *pos
);
2780 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2782 struct inet6_ifaddr
*ifa
;
2784 ifa
= if6_get_next(seq
, v
);
2789 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2791 read_unlock_bh(&addrconf_hash_lock
);
2794 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2796 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2798 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2800 ifp
->idev
->dev
->ifindex
,
2804 ifp
->idev
->dev
->name
);
2808 static const struct seq_operations if6_seq_ops
= {
2809 .start
= if6_seq_start
,
2810 .next
= if6_seq_next
,
2811 .show
= if6_seq_show
,
2812 .stop
= if6_seq_stop
,
2815 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2817 return seq_open_private(file
, &if6_seq_ops
,
2818 sizeof(struct if6_iter_state
));
2821 static const struct file_operations if6_fops
= {
2822 .owner
= THIS_MODULE
,
2823 .open
= if6_seq_open
,
2825 .llseek
= seq_lseek
,
2826 .release
= seq_release_private
,
2829 int __init
if6_proc_init(void)
2831 if (!proc_net_fops_create(&init_net
, "if_inet6", S_IRUGO
, &if6_fops
))
2836 void if6_proc_exit(void)
2838 proc_net_remove(&init_net
, "if_inet6");
2840 #endif /* CONFIG_PROC_FS */
2842 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2843 /* Check if address is a home address configured on any interface. */
2844 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2847 struct inet6_ifaddr
* ifp
;
2848 u8 hash
= ipv6_addr_hash(addr
);
2849 read_lock_bh(&addrconf_hash_lock
);
2850 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2851 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2852 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2857 read_unlock_bh(&addrconf_hash_lock
);
2863 * Periodic address status verification
2866 static void addrconf_verify(unsigned long foo
)
2868 struct inet6_ifaddr
*ifp
;
2869 unsigned long now
, next
;
2872 spin_lock_bh(&addrconf_verify_lock
);
2874 next
= now
+ ADDR_CHECK_FREQUENCY
;
2876 del_timer(&addr_chk_timer
);
2878 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2881 read_lock(&addrconf_hash_lock
);
2882 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2884 #ifdef CONFIG_IPV6_PRIVACY
2885 unsigned long regen_advance
;
2888 if (ifp
->flags
& IFA_F_PERMANENT
)
2891 spin_lock(&ifp
->lock
);
2892 age
= (now
- ifp
->tstamp
) / HZ
;
2894 #ifdef CONFIG_IPV6_PRIVACY
2895 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2896 ifp
->idev
->cnf
.dad_transmits
*
2897 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2900 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2901 age
>= ifp
->valid_lft
) {
2902 spin_unlock(&ifp
->lock
);
2904 read_unlock(&addrconf_hash_lock
);
2907 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2908 spin_unlock(&ifp
->lock
);
2910 } else if (age
>= ifp
->prefered_lft
) {
2911 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2914 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2916 ifp
->flags
|= IFA_F_DEPRECATED
;
2919 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2920 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2922 spin_unlock(&ifp
->lock
);
2926 read_unlock(&addrconf_hash_lock
);
2928 ipv6_ifa_notify(0, ifp
);
2932 #ifdef CONFIG_IPV6_PRIVACY
2933 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2934 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2935 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2936 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2937 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2938 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2939 if (!ifp
->regen_count
&& ifpub
) {
2942 in6_ifa_hold(ifpub
);
2943 spin_unlock(&ifp
->lock
);
2944 read_unlock(&addrconf_hash_lock
);
2945 spin_lock(&ifpub
->lock
);
2946 ifpub
->regen_count
= 0;
2947 spin_unlock(&ifpub
->lock
);
2948 ipv6_create_tempaddr(ifpub
, ifp
);
2953 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2954 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2955 spin_unlock(&ifp
->lock
);
2958 /* ifp->prefered_lft <= ifp->valid_lft */
2959 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2960 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2961 spin_unlock(&ifp
->lock
);
2964 read_unlock(&addrconf_hash_lock
);
2967 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2968 add_timer(&addr_chk_timer
);
2969 spin_unlock_bh(&addrconf_verify_lock
);
2972 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2974 struct in6_addr
*pfx
= NULL
;
2977 pfx
= nla_data(addr
);
2980 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2983 pfx
= nla_data(local
);
2989 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
2990 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2991 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2992 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2996 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2998 struct net
*net
= skb
->sk
->sk_net
;
2999 struct ifaddrmsg
*ifm
;
3000 struct nlattr
*tb
[IFA_MAX
+1];
3001 struct in6_addr
*pfx
;
3004 if (net
!= &init_net
)
3007 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3011 ifm
= nlmsg_data(nlh
);
3012 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3016 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3019 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3020 u32 prefered_lft
, u32 valid_lft
)
3022 u32 flags
= RTF_EXPIRES
;
3024 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3027 if (valid_lft
== INFINITY_LIFE_TIME
) {
3028 ifa_flags
|= IFA_F_PERMANENT
;
3030 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3031 valid_lft
= 0x7FFFFFFF/HZ
;
3033 if (prefered_lft
== 0)
3034 ifa_flags
|= IFA_F_DEPRECATED
;
3035 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3036 (prefered_lft
!= INFINITY_LIFE_TIME
))
3037 prefered_lft
= 0x7FFFFFFF/HZ
;
3039 spin_lock_bh(&ifp
->lock
);
3040 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3041 ifp
->tstamp
= jiffies
;
3042 ifp
->valid_lft
= valid_lft
;
3043 ifp
->prefered_lft
= prefered_lft
;
3045 spin_unlock_bh(&ifp
->lock
);
3046 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3047 ipv6_ifa_notify(0, ifp
);
3049 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3050 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3057 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3059 struct net
*net
= skb
->sk
->sk_net
;
3060 struct ifaddrmsg
*ifm
;
3061 struct nlattr
*tb
[IFA_MAX
+1];
3062 struct in6_addr
*pfx
;
3063 struct inet6_ifaddr
*ifa
;
3064 struct net_device
*dev
;
3065 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3069 if (net
!= &init_net
)
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 struct net
*net
= skb
->sk
->sk_net
;
3346 enum addr_type_t type
= UNICAST_ADDR
;
3348 if (net
!= &init_net
)
3351 return inet6_dump_addr(skb
, cb
, type
);
3354 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3356 struct net
*net
= skb
->sk
->sk_net
;
3357 enum addr_type_t type
= MULTICAST_ADDR
;
3359 if (net
!= &init_net
)
3362 return inet6_dump_addr(skb
, cb
, type
);
3366 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3368 struct net
*net
= skb
->sk
->sk_net
;
3369 enum addr_type_t type
= ANYCAST_ADDR
;
3371 if (net
!= &init_net
)
3374 return inet6_dump_addr(skb
, cb
, type
);
3377 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3380 struct net
*net
= in_skb
->sk
->sk_net
;
3381 struct ifaddrmsg
*ifm
;
3382 struct nlattr
*tb
[IFA_MAX
+1];
3383 struct in6_addr
*addr
= NULL
;
3384 struct net_device
*dev
= NULL
;
3385 struct inet6_ifaddr
*ifa
;
3386 struct sk_buff
*skb
;
3389 if (net
!= &init_net
)
3392 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3396 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3402 ifm
= nlmsg_data(nlh
);
3404 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3406 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3407 err
= -EADDRNOTAVAIL
;
3411 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3416 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3417 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3419 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3420 WARN_ON(err
== -EMSGSIZE
);
3424 err
= rtnl_unicast(skb
, &init_net
, NETLINK_CB(in_skb
).pid
);
3431 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3433 struct sk_buff
*skb
;
3436 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3440 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3442 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3443 WARN_ON(err
== -EMSGSIZE
);
3447 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3450 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3453 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3454 __s32
*array
, int bytes
)
3456 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3458 memset(array
, 0, bytes
);
3459 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3460 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3461 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3462 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3463 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3464 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3465 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3466 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3467 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3468 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3469 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3470 #ifdef CONFIG_IPV6_PRIVACY
3471 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3472 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3473 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3474 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3475 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3477 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3478 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3479 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3480 #ifdef CONFIG_IPV6_ROUTER_PREF
3481 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3482 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3483 #ifdef CONFIG_IPV6_ROUTE_INFO
3484 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3487 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3488 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3489 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3490 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3494 static inline size_t inet6_if_nlmsg_size(void)
3496 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3497 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3498 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3499 + nla_total_size(4) /* IFLA_MTU */
3500 + nla_total_size(4) /* IFLA_LINK */
3501 + nla_total_size( /* IFLA_PROTINFO */
3502 nla_total_size(4) /* IFLA_INET6_FLAGS */
3503 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3504 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3505 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3506 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3510 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3514 int pad
= bytes
- sizeof(u64
) * items
;
3517 /* Use put_unaligned() because stats may not be aligned for u64. */
3518 put_unaligned(items
, &stats
[0]);
3519 for (i
= 1; i
< items
; i
++)
3520 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3522 memset(&stats
[items
], 0, pad
);
3525 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3529 case IFLA_INET6_STATS
:
3530 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3532 case IFLA_INET6_ICMP6STATS
:
3533 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3538 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3539 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3541 struct net_device
*dev
= idev
->dev
;
3543 struct ifinfomsg
*hdr
;
3544 struct nlmsghdr
*nlh
;
3546 struct ifla_cacheinfo ci
;
3548 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3552 hdr
= nlmsg_data(nlh
);
3553 hdr
->ifi_family
= AF_INET6
;
3555 hdr
->ifi_type
= dev
->type
;
3556 hdr
->ifi_index
= dev
->ifindex
;
3557 hdr
->ifi_flags
= dev_get_flags(dev
);
3558 hdr
->ifi_change
= 0;
3560 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3563 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3565 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3566 if (dev
->ifindex
!= dev
->iflink
)
3567 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3569 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3570 if (protoinfo
== NULL
)
3571 goto nla_put_failure
;
3573 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3575 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3576 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3577 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3578 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3579 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3580 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3582 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3584 goto nla_put_failure
;
3585 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3587 /* XXX - MC not implemented */
3589 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3591 goto nla_put_failure
;
3592 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3594 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3596 goto nla_put_failure
;
3597 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3599 nla_nest_end(skb
, protoinfo
);
3600 return nlmsg_end(skb
, nlh
);
3603 nlmsg_cancel(skb
, nlh
);
3607 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3609 struct net
*net
= skb
->sk
->sk_net
;
3611 int s_idx
= cb
->args
[0];
3612 struct net_device
*dev
;
3613 struct inet6_dev
*idev
;
3615 if (net
!= &init_net
)
3618 read_lock(&dev_base_lock
);
3620 for_each_netdev(&init_net
, dev
) {
3623 if ((idev
= in6_dev_get(dev
)) == NULL
)
3625 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3626 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3633 read_unlock(&dev_base_lock
);
3639 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3641 struct sk_buff
*skb
;
3644 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3648 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3650 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3651 WARN_ON(err
== -EMSGSIZE
);
3655 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3658 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3661 static inline size_t inet6_prefix_nlmsg_size(void)
3663 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3664 + nla_total_size(sizeof(struct in6_addr
))
3665 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3668 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3669 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3670 int event
, unsigned int flags
)
3672 struct prefixmsg
*pmsg
;
3673 struct nlmsghdr
*nlh
;
3674 struct prefix_cacheinfo ci
;
3676 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3680 pmsg
= nlmsg_data(nlh
);
3681 pmsg
->prefix_family
= AF_INET6
;
3682 pmsg
->prefix_pad1
= 0;
3683 pmsg
->prefix_pad2
= 0;
3684 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3685 pmsg
->prefix_len
= pinfo
->prefix_len
;
3686 pmsg
->prefix_type
= pinfo
->type
;
3687 pmsg
->prefix_pad3
= 0;
3688 pmsg
->prefix_flags
= 0;
3690 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3691 if (pinfo
->autoconf
)
3692 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3694 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3696 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3697 ci
.valid_time
= ntohl(pinfo
->valid
);
3698 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3700 return nlmsg_end(skb
, nlh
);
3703 nlmsg_cancel(skb
, nlh
);
3707 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3708 struct prefix_info
*pinfo
)
3710 struct sk_buff
*skb
;
3713 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3717 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3719 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3720 WARN_ON(err
== -EMSGSIZE
);
3724 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3727 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_PREFIX
, err
);
3730 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3732 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3737 * If the address was optimistic
3738 * we inserted the route at the start of
3739 * our DAD process, so we don't need
3742 if (!(ifp
->rt
->rt6i_node
))
3743 ip6_ins_rt(ifp
->rt
);
3744 if (ifp
->idev
->cnf
.forwarding
)
3745 addrconf_join_anycast(ifp
);
3748 if (ifp
->idev
->cnf
.forwarding
)
3749 addrconf_leave_anycast(ifp
);
3750 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3751 dst_hold(&ifp
->rt
->u
.dst
);
3752 if (ip6_del_rt(ifp
->rt
))
3753 dst_free(&ifp
->rt
->u
.dst
);
3758 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3761 if (likely(ifp
->idev
->dead
== 0))
3762 __ipv6_ifa_notify(event
, ifp
);
3763 rcu_read_unlock_bh();
3766 #ifdef CONFIG_SYSCTL
3769 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3770 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3772 int *valp
= ctl
->data
;
3776 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3779 addrconf_fixup_forwarding(ctl
, valp
, val
);
3783 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3784 int __user
*name
, int nlen
,
3785 void __user
*oldval
,
3786 size_t __user
*oldlenp
,
3787 void __user
*newval
, size_t newlen
)
3789 int *valp
= table
->data
;
3793 if (!newval
|| !newlen
)
3795 if (newlen
!= sizeof(int))
3797 if (get_user(new, (int __user
*)newval
))
3801 if (oldval
&& oldlenp
) {
3803 if (get_user(len
, oldlenp
))
3806 if (len
> table
->maxlen
)
3807 len
= table
->maxlen
;
3808 if (copy_to_user(oldval
, valp
, len
))
3810 if (put_user(len
, oldlenp
))
3816 addrconf_fixup_forwarding(table
, valp
, val
);
3820 static struct addrconf_sysctl_table
3822 struct ctl_table_header
*sysctl_header
;
3823 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3825 } addrconf_sysctl __read_mostly
= {
3826 .sysctl_header
= NULL
,
3829 .ctl_name
= NET_IPV6_FORWARDING
,
3830 .procname
= "forwarding",
3831 .data
= &ipv6_devconf
.forwarding
,
3832 .maxlen
= sizeof(int),
3834 .proc_handler
= &addrconf_sysctl_forward
,
3835 .strategy
= &addrconf_sysctl_forward_strategy
,
3838 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3839 .procname
= "hop_limit",
3840 .data
= &ipv6_devconf
.hop_limit
,
3841 .maxlen
= sizeof(int),
3843 .proc_handler
= proc_dointvec
,
3846 .ctl_name
= NET_IPV6_MTU
,
3848 .data
= &ipv6_devconf
.mtu6
,
3849 .maxlen
= sizeof(int),
3851 .proc_handler
= &proc_dointvec
,
3854 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3855 .procname
= "accept_ra",
3856 .data
= &ipv6_devconf
.accept_ra
,
3857 .maxlen
= sizeof(int),
3859 .proc_handler
= &proc_dointvec
,
3862 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3863 .procname
= "accept_redirects",
3864 .data
= &ipv6_devconf
.accept_redirects
,
3865 .maxlen
= sizeof(int),
3867 .proc_handler
= &proc_dointvec
,
3870 .ctl_name
= NET_IPV6_AUTOCONF
,
3871 .procname
= "autoconf",
3872 .data
= &ipv6_devconf
.autoconf
,
3873 .maxlen
= sizeof(int),
3875 .proc_handler
= &proc_dointvec
,
3878 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3879 .procname
= "dad_transmits",
3880 .data
= &ipv6_devconf
.dad_transmits
,
3881 .maxlen
= sizeof(int),
3883 .proc_handler
= &proc_dointvec
,
3886 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3887 .procname
= "router_solicitations",
3888 .data
= &ipv6_devconf
.rtr_solicits
,
3889 .maxlen
= sizeof(int),
3891 .proc_handler
= &proc_dointvec
,
3894 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3895 .procname
= "router_solicitation_interval",
3896 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3897 .maxlen
= sizeof(int),
3899 .proc_handler
= &proc_dointvec_jiffies
,
3900 .strategy
= &sysctl_jiffies
,
3903 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3904 .procname
= "router_solicitation_delay",
3905 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3906 .maxlen
= sizeof(int),
3908 .proc_handler
= &proc_dointvec_jiffies
,
3909 .strategy
= &sysctl_jiffies
,
3912 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3913 .procname
= "force_mld_version",
3914 .data
= &ipv6_devconf
.force_mld_version
,
3915 .maxlen
= sizeof(int),
3917 .proc_handler
= &proc_dointvec
,
3919 #ifdef CONFIG_IPV6_PRIVACY
3921 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3922 .procname
= "use_tempaddr",
3923 .data
= &ipv6_devconf
.use_tempaddr
,
3924 .maxlen
= sizeof(int),
3926 .proc_handler
= &proc_dointvec
,
3929 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3930 .procname
= "temp_valid_lft",
3931 .data
= &ipv6_devconf
.temp_valid_lft
,
3932 .maxlen
= sizeof(int),
3934 .proc_handler
= &proc_dointvec
,
3937 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3938 .procname
= "temp_prefered_lft",
3939 .data
= &ipv6_devconf
.temp_prefered_lft
,
3940 .maxlen
= sizeof(int),
3942 .proc_handler
= &proc_dointvec
,
3945 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3946 .procname
= "regen_max_retry",
3947 .data
= &ipv6_devconf
.regen_max_retry
,
3948 .maxlen
= sizeof(int),
3950 .proc_handler
= &proc_dointvec
,
3953 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3954 .procname
= "max_desync_factor",
3955 .data
= &ipv6_devconf
.max_desync_factor
,
3956 .maxlen
= sizeof(int),
3958 .proc_handler
= &proc_dointvec
,
3962 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3963 .procname
= "max_addresses",
3964 .data
= &ipv6_devconf
.max_addresses
,
3965 .maxlen
= sizeof(int),
3967 .proc_handler
= &proc_dointvec
,
3970 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3971 .procname
= "accept_ra_defrtr",
3972 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3973 .maxlen
= sizeof(int),
3975 .proc_handler
= &proc_dointvec
,
3978 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3979 .procname
= "accept_ra_pinfo",
3980 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3981 .maxlen
= sizeof(int),
3983 .proc_handler
= &proc_dointvec
,
3985 #ifdef CONFIG_IPV6_ROUTER_PREF
3987 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3988 .procname
= "accept_ra_rtr_pref",
3989 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3990 .maxlen
= sizeof(int),
3992 .proc_handler
= &proc_dointvec
,
3995 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
3996 .procname
= "router_probe_interval",
3997 .data
= &ipv6_devconf
.rtr_probe_interval
,
3998 .maxlen
= sizeof(int),
4000 .proc_handler
= &proc_dointvec_jiffies
,
4001 .strategy
= &sysctl_jiffies
,
4003 #ifdef CONFIG_IPV6_ROUTE_INFO
4005 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4006 .procname
= "accept_ra_rt_info_max_plen",
4007 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4008 .maxlen
= sizeof(int),
4010 .proc_handler
= &proc_dointvec
,
4015 .ctl_name
= NET_IPV6_PROXY_NDP
,
4016 .procname
= "proxy_ndp",
4017 .data
= &ipv6_devconf
.proxy_ndp
,
4018 .maxlen
= sizeof(int),
4020 .proc_handler
= &proc_dointvec
,
4023 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4024 .procname
= "accept_source_route",
4025 .data
= &ipv6_devconf
.accept_source_route
,
4026 .maxlen
= sizeof(int),
4028 .proc_handler
= &proc_dointvec
,
4030 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4032 .ctl_name
= CTL_UNNUMBERED
,
4033 .procname
= "optimistic_dad",
4034 .data
= &ipv6_devconf
.optimistic_dad
,
4035 .maxlen
= sizeof(int),
4037 .proc_handler
= &proc_dointvec
,
4042 .ctl_name
= 0, /* sentinel */
4047 static int __addrconf_sysctl_register(char *dev_name
, int ctl_name
,
4048 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4051 struct addrconf_sysctl_table
*t
;
4053 #define ADDRCONF_CTL_PATH_DEV 3
4055 struct ctl_path addrconf_ctl_path
[] = {
4056 { .procname
= "net", .ctl_name
= CTL_NET
, },
4057 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
4058 { .procname
= "conf", .ctl_name
= NET_IPV6_CONF
, },
4059 { /* to be set */ },
4064 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4068 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4069 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4070 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4074 * Make a copy of dev_name, because '.procname' is regarded as const
4075 * by sysctl and we wouldn't want anyone to change it under our feet
4076 * (see SIOCSIFNAME).
4078 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4082 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4083 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].ctl_name
= ctl_name
;
4085 t
->sysctl_header
= register_sysctl_paths(addrconf_ctl_path
,
4087 if (t
->sysctl_header
== NULL
)
4101 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4103 struct addrconf_sysctl_table
*t
;
4105 if (p
->sysctl
== NULL
)
4110 unregister_sysctl_table(t
->sysctl_header
);
4115 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4117 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, NET_IPV6
,
4118 NET_IPV6_NEIGH
, "ipv6",
4119 &ndisc_ifinfo_sysctl_change
,
4121 __addrconf_sysctl_register(idev
->dev
->name
, idev
->dev
->ifindex
,
4125 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4127 __addrconf_sysctl_unregister(&idev
->cnf
);
4128 neigh_sysctl_unregister(idev
->nd_parms
);
4138 int register_inet6addr_notifier(struct notifier_block
*nb
)
4140 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4143 EXPORT_SYMBOL(register_inet6addr_notifier
);
4145 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4147 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4150 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4153 * Init / cleanup code
4156 int __init
addrconf_init(void)
4160 if ((err
= ipv6_addr_label_init()) < 0) {
4161 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4166 /* The addrconf netdev notifier requires that loopback_dev
4167 * has it's ipv6 private information allocated and setup
4168 * before it can bring up and give link-local addresses
4169 * to other devices which are up.
4171 * Unfortunately, loopback_dev is not necessarily the first
4172 * entry in the global dev_base list of net devices. In fact,
4173 * it is likely to be the very last entry on that list.
4174 * So this causes the notifier registry below to try and
4175 * give link-local addresses to all devices besides loopback_dev
4176 * first, then loopback_dev, which cases all the non-loopback_dev
4177 * devices to fail to get a link-local address.
4179 * So, as a temporary fix, allocate the ipv6 structure for
4180 * loopback_dev first by hand.
4181 * Longer term, all of the dependencies ipv6 has upon the loopback
4182 * device and it being up should be removed.
4185 if (!ipv6_add_dev(init_net
.loopback_dev
))
4191 ip6_null_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4192 ip6_null_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4193 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4194 ip6_prohibit_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4195 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4196 ip6_blk_hole_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4197 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4200 register_netdevice_notifier(&ipv6_dev_notf
);
4204 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4208 /* Only the first call to __rtnl_register can fail */
4209 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4210 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4211 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4212 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4213 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4215 ipv6_addr_label_rtnl_register();
4217 #ifdef CONFIG_SYSCTL
4218 __addrconf_sysctl_register("all", NET_PROTO_CONF_ALL
,
4219 NULL
, &ipv6_devconf
);
4220 __addrconf_sysctl_register("default", NET_PROTO_CONF_DEFAULT
,
4221 NULL
, &ipv6_devconf_dflt
);
4226 unregister_netdevice_notifier(&ipv6_dev_notf
);
4231 void addrconf_cleanup(void)
4233 struct net_device
*dev
;
4234 struct inet6_ifaddr
*ifa
;
4237 unregister_netdevice_notifier(&ipv6_dev_notf
);
4239 #ifdef CONFIG_SYSCTL
4240 __addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4241 __addrconf_sysctl_unregister(&ipv6_devconf
);
4250 for_each_netdev(&init_net
, dev
) {
4251 if (__in6_dev_get(dev
) == NULL
)
4253 addrconf_ifdown(dev
, 1);
4255 addrconf_ifdown(init_net
.loopback_dev
, 2);
4261 write_lock_bh(&addrconf_hash_lock
);
4262 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4263 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4264 struct inet6_ifaddr
*bifa
;
4267 ifa
= ifa
->lst_next
;
4268 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4269 /* Do not free it; something is wrong.
4270 Now we can investigate it with debugger.
4274 write_unlock_bh(&addrconf_hash_lock
);
4276 del_timer(&addr_chk_timer
);