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 ipv6_devconf
*p
);
108 #ifdef CONFIG_IPV6_PRIVACY
109 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
110 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
111 static void ipv6_regen_rndid(unsigned long data
);
113 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
116 static int ipv6_count_addresses(struct inet6_dev
*idev
);
119 * Configured unicast address hash table
121 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
122 static DEFINE_RWLOCK(addrconf_hash_lock
);
124 static void addrconf_verify(unsigned long);
126 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
127 static DEFINE_SPINLOCK(addrconf_verify_lock
);
129 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
130 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
132 static int addrconf_ifdown(struct net_device
*dev
, int how
);
134 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
135 static void addrconf_dad_timer(unsigned long data
);
136 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
137 static void addrconf_dad_run(struct inet6_dev
*idev
);
138 static void addrconf_rs_timer(unsigned long data
);
139 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
140 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
142 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
143 struct prefix_info
*pinfo
);
144 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
146 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
148 struct ipv6_devconf ipv6_devconf __read_mostly
= {
150 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
151 .mtu6
= IPV6_MIN_MTU
,
153 .accept_redirects
= 1,
155 .force_mld_version
= 0,
157 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
158 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
159 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
160 #ifdef CONFIG_IPV6_PRIVACY
162 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
163 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
164 .regen_max_retry
= REGEN_MAX_RETRY
,
165 .max_desync_factor
= MAX_DESYNC_FACTOR
,
167 .max_addresses
= IPV6_MAX_ADDRESSES
,
168 .accept_ra_defrtr
= 1,
169 .accept_ra_pinfo
= 1,
170 #ifdef CONFIG_IPV6_ROUTER_PREF
171 .accept_ra_rtr_pref
= 1,
172 .rtr_probe_interval
= 60 * HZ
,
173 #ifdef CONFIG_IPV6_ROUTE_INFO
174 .accept_ra_rt_info_max_plen
= 0,
178 .accept_source_route
= 0, /* we do not accept RH0 by default. */
181 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
183 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
184 .mtu6
= IPV6_MIN_MTU
,
186 .accept_redirects
= 1,
189 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
190 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
191 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
192 #ifdef CONFIG_IPV6_PRIVACY
194 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
195 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
196 .regen_max_retry
= REGEN_MAX_RETRY
,
197 .max_desync_factor
= MAX_DESYNC_FACTOR
,
199 .max_addresses
= IPV6_MAX_ADDRESSES
,
200 .accept_ra_defrtr
= 1,
201 .accept_ra_pinfo
= 1,
202 #ifdef CONFIG_IPV6_ROUTER_PREF
203 .accept_ra_rtr_pref
= 1,
204 .rtr_probe_interval
= 60 * HZ
,
205 #ifdef CONFIG_IPV6_ROUTE_INFO
206 .accept_ra_rt_info_max_plen
= 0,
210 .accept_source_route
= 0, /* we do not accept RH0 by default. */
213 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
214 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
215 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
217 /* Check if a valid qdisc is available */
218 static inline int addrconf_qdisc_ok(struct net_device
*dev
)
220 return (dev
->qdisc
!= &noop_qdisc
);
223 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
225 if (del_timer(&ifp
->timer
))
229 enum addrconf_timer_t
236 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
237 enum addrconf_timer_t what
,
240 if (!del_timer(&ifp
->timer
))
245 ifp
->timer
.function
= addrconf_dad_timer
;
248 ifp
->timer
.function
= addrconf_rs_timer
;
252 ifp
->timer
.expires
= jiffies
+ when
;
253 add_timer(&ifp
->timer
);
256 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
258 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
259 sizeof(struct ipstats_mib
)) < 0)
261 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
262 sizeof(struct icmpv6_mib
)) < 0)
264 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
265 sizeof(struct icmpv6msg_mib
)) < 0)
271 snmp_mib_free((void **)idev
->stats
.icmpv6
);
273 snmp_mib_free((void **)idev
->stats
.ipv6
);
278 static void snmp6_free_dev(struct inet6_dev
*idev
)
280 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
281 snmp_mib_free((void **)idev
->stats
.icmpv6
);
282 snmp_mib_free((void **)idev
->stats
.ipv6
);
285 /* Nobody refers to this device, we may destroy it. */
287 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
289 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
293 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
295 struct net_device
*dev
= idev
->dev
;
296 BUG_TRAP(idev
->addr_list
==NULL
);
297 BUG_TRAP(idev
->mc_list
==NULL
);
298 #ifdef NET_REFCNT_DEBUG
299 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
303 printk("Freeing alive inet6 device %p\n", idev
);
306 snmp6_free_dev(idev
);
307 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
310 EXPORT_SYMBOL(in6_dev_finish_destroy
);
312 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
314 struct inet6_dev
*ndev
;
315 struct in6_addr maddr
;
319 if (dev
->mtu
< IPV6_MIN_MTU
)
322 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
327 rwlock_init(&ndev
->lock
);
329 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
330 ndev
->cnf
.mtu6
= dev
->mtu
;
331 ndev
->cnf
.sysctl
= NULL
;
332 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
333 if (ndev
->nd_parms
== NULL
) {
337 /* We refer to the device */
340 if (snmp6_alloc_dev(ndev
) < 0) {
342 "%s(): cannot allocate memory for statistics; dev=%s.\n",
343 __FUNCTION__
, dev
->name
));
344 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
346 in6_dev_finish_destroy(ndev
);
350 if (snmp6_register_dev(ndev
) < 0) {
352 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
353 __FUNCTION__
, dev
->name
));
354 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
356 in6_dev_finish_destroy(ndev
);
360 /* One reference from device. We must do this before
361 * we invoke __ipv6_regen_rndid().
365 #ifdef CONFIG_IPV6_PRIVACY
366 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
367 if ((dev
->flags
&IFF_LOOPBACK
) ||
368 dev
->type
== ARPHRD_TUNNEL
||
369 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
370 dev
->type
== ARPHRD_SIT
||
372 dev
->type
== ARPHRD_NONE
) {
374 "%s: Disabled Privacy Extensions\n",
376 ndev
->cnf
.use_tempaddr
= -1;
378 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
380 "%s: Disabled Multicast RS\n",
382 ndev
->cnf
.rtr_solicits
= 0;
386 ipv6_regen_rndid((unsigned long) ndev
);
390 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
391 ndev
->if_flags
|= IF_READY
;
393 ipv6_mc_init_dev(ndev
);
394 ndev
->tstamp
= jiffies
;
396 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
397 NET_IPV6_NEIGH
, "ipv6",
398 &ndisc_ifinfo_sysctl_change
,
400 addrconf_sysctl_register(ndev
);
402 /* protected by rtnl_lock */
403 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
405 /* Join all-node multicast group */
406 ipv6_addr_all_nodes(&maddr
);
407 ipv6_dev_mc_inc(dev
, &maddr
);
412 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
414 struct inet6_dev
*idev
;
418 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
419 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
423 if (dev
->flags
&IFF_UP
)
429 static void dev_forward_change(struct inet6_dev
*idev
)
431 struct net_device
*dev
;
432 struct inet6_ifaddr
*ifa
;
433 struct in6_addr addr
;
438 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
439 ipv6_addr_all_routers(&addr
);
441 if (idev
->cnf
.forwarding
)
442 ipv6_dev_mc_inc(dev
, &addr
);
444 ipv6_dev_mc_dec(dev
, &addr
);
446 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
447 if (ifa
->flags
&IFA_F_TENTATIVE
)
449 if (idev
->cnf
.forwarding
)
450 addrconf_join_anycast(ifa
);
452 addrconf_leave_anycast(ifa
);
457 static void addrconf_forward_change(void)
459 struct net_device
*dev
;
460 struct inet6_dev
*idev
;
462 read_lock(&dev_base_lock
);
463 for_each_netdev(&init_net
, dev
) {
465 idev
= __in6_dev_get(dev
);
467 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
468 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
470 dev_forward_change(idev
);
474 read_unlock(&dev_base_lock
);
477 static void addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
479 if (p
== &ipv6_devconf_dflt
.forwarding
)
482 if (p
== &ipv6_devconf
.forwarding
) {
483 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
484 addrconf_forward_change();
485 } else if ((!*p
) ^ (!old
))
486 dev_forward_change((struct inet6_dev
*)table
->extra1
);
489 rt6_purge_dflt_routers();
493 /* Nobody refers to this ifaddr, destroy it */
495 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
497 BUG_TRAP(ifp
->if_next
==NULL
);
498 BUG_TRAP(ifp
->lst_next
==NULL
);
499 #ifdef NET_REFCNT_DEBUG
500 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
503 in6_dev_put(ifp
->idev
);
505 if (del_timer(&ifp
->timer
))
506 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
509 printk("Freeing alive inet6 address %p\n", ifp
);
512 dst_release(&ifp
->rt
->u
.dst
);
518 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
520 struct inet6_ifaddr
*ifa
, **ifap
;
521 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
524 * Each device address list is sorted in order of scope -
525 * global before linklocal.
527 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
528 ifap
= &ifa
->if_next
) {
529 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
533 ifp
->if_next
= *ifap
;
537 /* On success it returns ifp with increased reference count */
539 static struct inet6_ifaddr
*
540 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
541 int scope
, u32 flags
)
543 struct inet6_ifaddr
*ifa
= NULL
;
550 err
= -ENODEV
; /*XXX*/
554 write_lock(&addrconf_hash_lock
);
556 /* Ignore adding duplicate addresses on an interface */
557 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
558 ADBG(("ipv6_add_addr: already assigned\n"));
563 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
566 ADBG(("ipv6_add_addr: malloc failed\n"));
571 rt
= addrconf_dst_alloc(idev
, addr
, 0);
577 ipv6_addr_copy(&ifa
->addr
, addr
);
579 spin_lock_init(&ifa
->lock
);
580 init_timer(&ifa
->timer
);
581 ifa
->timer
.data
= (unsigned long) ifa
;
583 ifa
->prefix_len
= pfxlen
;
584 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
585 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
590 * part one of RFC 4429, section 3.3
591 * We should not configure an address as
592 * optimistic if we do not yet know the link
593 * layer address of our nexhop router
596 if (rt
->rt6i_nexthop
== NULL
)
597 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
604 /* Add to big hash table */
605 hash
= ipv6_addr_hash(addr
);
607 ifa
->lst_next
= inet6_addr_lst
[hash
];
608 inet6_addr_lst
[hash
] = ifa
;
610 write_unlock(&addrconf_hash_lock
);
612 write_lock(&idev
->lock
);
613 /* Add to inet6_dev unicast addr list. */
614 ipv6_link_dev_addr(idev
, ifa
);
616 #ifdef CONFIG_IPV6_PRIVACY
617 if (ifa
->flags
&IFA_F_TEMPORARY
) {
618 ifa
->tmp_next
= idev
->tempaddr_list
;
619 idev
->tempaddr_list
= ifa
;
625 write_unlock(&idev
->lock
);
627 rcu_read_unlock_bh();
629 if (likely(err
== 0))
630 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
638 write_unlock(&addrconf_hash_lock
);
642 /* This function wants to get referenced ifp and releases it before return */
644 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
646 struct inet6_ifaddr
*ifa
, **ifap
;
647 struct inet6_dev
*idev
= ifp
->idev
;
649 int deleted
= 0, onlink
= 0;
650 unsigned long expires
= jiffies
;
652 hash
= ipv6_addr_hash(&ifp
->addr
);
656 write_lock_bh(&addrconf_hash_lock
);
657 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
658 ifap
= &ifa
->lst_next
) {
660 *ifap
= ifa
->lst_next
;
662 ifa
->lst_next
= NULL
;
666 write_unlock_bh(&addrconf_hash_lock
);
668 write_lock_bh(&idev
->lock
);
669 #ifdef CONFIG_IPV6_PRIVACY
670 if (ifp
->flags
&IFA_F_TEMPORARY
) {
671 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
672 ifap
= &ifa
->tmp_next
) {
674 *ifap
= ifa
->tmp_next
;
676 in6_ifa_put(ifp
->ifpub
);
680 ifa
->tmp_next
= NULL
;
687 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
689 *ifap
= ifa
->if_next
;
692 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
696 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
697 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
699 if (ifa
->flags
& IFA_F_PERMANENT
) {
704 unsigned long lifetime
;
709 spin_lock(&ifa
->lock
);
710 lifetime
= min_t(unsigned long,
711 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
712 if (time_before(expires
,
713 ifa
->tstamp
+ lifetime
* HZ
))
714 expires
= ifa
->tstamp
+ lifetime
* HZ
;
715 spin_unlock(&ifa
->lock
);
719 ifap
= &ifa
->if_next
;
721 write_unlock_bh(&idev
->lock
);
723 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
725 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
727 addrconf_del_timer(ifp
);
730 * Purge or update corresponding prefix
732 * 1) we don't purge prefix here if address was not permanent.
733 * prefix is managed by its own lifetime.
734 * 2) if there're no addresses, delete prefix.
735 * 3) if there're still other permanent address(es),
736 * corresponding prefix is still permanent.
737 * 4) otherwise, update prefix lifetime to the
738 * longest valid lifetime among the corresponding
739 * addresses on the device.
740 * Note: subsequent RA will update lifetime.
744 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
745 struct in6_addr prefix
;
748 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
749 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
751 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
755 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
756 rt
->rt6i_expires
= expires
;
757 rt
->rt6i_flags
|= RTF_EXPIRES
;
760 dst_release(&rt
->u
.dst
);
766 #ifdef CONFIG_IPV6_PRIVACY
767 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
769 struct inet6_dev
*idev
= ifp
->idev
;
770 struct in6_addr addr
, *tmpaddr
;
771 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
777 write_lock(&idev
->lock
);
779 spin_lock_bh(&ift
->lock
);
780 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
781 spin_unlock_bh(&ift
->lock
);
788 if (idev
->cnf
.use_tempaddr
<= 0) {
789 write_unlock(&idev
->lock
);
791 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
796 spin_lock_bh(&ifp
->lock
);
797 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
798 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
799 spin_unlock_bh(&ifp
->lock
);
800 write_unlock(&idev
->lock
);
802 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
808 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
809 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
810 spin_unlock_bh(&ifp
->lock
);
811 write_unlock(&idev
->lock
);
813 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
819 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
820 tmp_valid_lft
= min_t(__u32
,
822 idev
->cnf
.temp_valid_lft
);
823 tmp_prefered_lft
= min_t(__u32
,
825 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
826 tmp_plen
= ifp
->prefix_len
;
827 max_addresses
= idev
->cnf
.max_addresses
;
828 tmp_cstamp
= ifp
->cstamp
;
829 tmp_tstamp
= ifp
->tstamp
;
830 spin_unlock_bh(&ifp
->lock
);
832 write_unlock(&idev
->lock
);
834 addr_flags
= IFA_F_TEMPORARY
;
835 /* set in addrconf_prefix_rcv() */
836 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
837 addr_flags
|= IFA_F_OPTIMISTIC
;
839 ift
= !max_addresses
||
840 ipv6_count_addresses(idev
) < max_addresses
?
841 ipv6_add_addr(idev
, &addr
, tmp_plen
,
842 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
844 if (!ift
|| IS_ERR(ift
)) {
848 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
850 write_lock(&idev
->lock
);
854 spin_lock_bh(&ift
->lock
);
856 ift
->valid_lft
= tmp_valid_lft
;
857 ift
->prefered_lft
= tmp_prefered_lft
;
858 ift
->cstamp
= tmp_cstamp
;
859 ift
->tstamp
= tmp_tstamp
;
860 spin_unlock_bh(&ift
->lock
);
862 addrconf_dad_start(ift
, 0);
871 * Choose an appropriate source address (RFC3484)
873 struct ipv6_saddr_score
{
881 #define IPV6_SADDR_SCORE_LOCAL 0x0001
882 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
883 #define IPV6_SADDR_SCORE_HOA 0x0008
884 #define IPV6_SADDR_SCORE_OIF 0x0010
885 #define IPV6_SADDR_SCORE_LABEL 0x0020
886 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
888 static inline int ipv6_saddr_preferred(int type
)
890 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
891 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
896 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
897 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
899 struct ipv6_saddr_score hiscore
;
900 struct inet6_ifaddr
*ifa_result
= NULL
;
901 int daddr_type
= __ipv6_addr_type(daddr
);
902 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
903 int daddr_ifindex
= daddr_dev
? daddr_dev
->ifindex
: 0;
904 u32 daddr_label
= ipv6_addr_label(daddr
, daddr_type
, daddr_ifindex
);
905 struct net_device
*dev
;
907 memset(&hiscore
, 0, sizeof(hiscore
));
909 read_lock(&dev_base_lock
);
912 for_each_netdev(&init_net
, dev
) {
913 struct inet6_dev
*idev
;
914 struct inet6_ifaddr
*ifa
;
916 /* Rule 0: Candidate Source Address (section 4)
917 * - multicast and link-local destination address,
918 * the set of candidate source address MUST only
919 * include addresses assigned to interfaces
920 * belonging to the same link as the outgoing
922 * (- For site-local destination addresses, the
923 * set of candidate source addresses MUST only
924 * include addresses assigned to interfaces
925 * belonging to the same site as the outgoing
928 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
929 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
930 daddr_dev
&& dev
!= daddr_dev
)
933 idev
= __in6_dev_get(dev
);
937 read_lock_bh(&idev
->lock
);
938 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
939 struct ipv6_saddr_score score
;
941 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
944 * - Tentative Address (RFC2462 section 5.4)
945 * - A tentative address is not considered
946 * "assigned to an interface" in the traditional
947 * sense, unless it is also flagged as optimistic.
948 * - Candidate Source Address (section 4)
949 * - In any case, anycast addresses, multicast
950 * addresses, and the unspecified address MUST
951 * NOT be included in a candidate set.
953 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
954 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
956 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
957 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
958 LIMIT_NETDEBUG(KERN_DEBUG
959 "ADDRCONF: unspecified / multicast address "
960 "assigned as unicast address on %s",
970 if (ifa_result
== NULL
) {
971 /* record it if the first available entry */
975 /* Rule 1: Prefer same address */
976 if (hiscore
.rule
< 1) {
977 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
978 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
981 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
982 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
983 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
988 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
992 /* Rule 2: Prefer appropriate scope */
993 if (hiscore
.rule
< 2) {
994 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
997 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
998 if (hiscore
.scope
< score
.scope
) {
999 if (hiscore
.scope
< daddr_scope
) {
1004 } else if (score
.scope
< hiscore
.scope
) {
1005 if (score
.scope
< daddr_scope
)
1006 break; /* addresses sorted by scope */
1013 /* Rule 3: Avoid deprecated and optimistic addresses */
1014 if (hiscore
.rule
< 3) {
1015 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1016 (((ifa_result
->flags
&
1017 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1018 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1021 if (ipv6_saddr_preferred(score
.addr_type
) ||
1023 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1024 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1025 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1030 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1034 /* Rule 4: Prefer home address */
1035 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1036 if (hiscore
.rule
< 4) {
1037 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1038 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1041 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1042 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1043 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1048 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1052 if (hiscore
.rule
< 4)
1056 /* Rule 5: Prefer outgoing interface */
1057 if (hiscore
.rule
< 5) {
1058 if (daddr_dev
== NULL
||
1059 daddr_dev
== ifa_result
->idev
->dev
)
1060 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1063 if (daddr_dev
== NULL
||
1064 daddr_dev
== ifa
->idev
->dev
) {
1065 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1066 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1071 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1075 /* Rule 6: Prefer matching label */
1076 if (hiscore
.rule
< 6) {
1077 if (ipv6_addr_label(&ifa_result
->addr
,
1079 ifa_result
->idev
->dev
->ifindex
) == daddr_label
)
1080 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1083 if (ipv6_addr_label(&ifa
->addr
,
1085 ifa
->idev
->dev
->ifindex
) == daddr_label
) {
1086 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1087 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1092 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1096 #ifdef CONFIG_IPV6_PRIVACY
1097 /* Rule 7: Prefer public address
1098 * Note: prefer temprary address if use_tempaddr >= 2
1100 if (hiscore
.rule
< 7) {
1101 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1102 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1103 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1106 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1107 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1108 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1109 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1114 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1118 if (hiscore
.rule
< 7)
1121 /* Rule 8: Use longest matching prefix */
1122 if (hiscore
.rule
< 8) {
1123 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1126 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1127 if (score
.matchlen
> hiscore
.matchlen
) {
1132 else if (score
.matchlen
< hiscore
.matchlen
)
1136 /* Final Rule: choose first available one */
1140 in6_ifa_put(ifa_result
);
1145 read_unlock_bh(&idev
->lock
);
1148 read_unlock(&dev_base_lock
);
1151 return -EADDRNOTAVAIL
;
1153 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1154 in6_ifa_put(ifa_result
);
1159 int ipv6_get_saddr(struct dst_entry
*dst
,
1160 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1162 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1165 EXPORT_SYMBOL(ipv6_get_saddr
);
1167 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1168 unsigned char banned_flags
)
1170 struct inet6_dev
*idev
;
1171 int err
= -EADDRNOTAVAIL
;
1174 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1175 struct inet6_ifaddr
*ifp
;
1177 read_lock_bh(&idev
->lock
);
1178 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1179 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1180 ipv6_addr_copy(addr
, &ifp
->addr
);
1185 read_unlock_bh(&idev
->lock
);
1191 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1194 struct inet6_ifaddr
*ifp
;
1196 read_lock_bh(&idev
->lock
);
1197 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1199 read_unlock_bh(&idev
->lock
);
1203 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1205 struct inet6_ifaddr
* ifp
;
1206 u8 hash
= ipv6_addr_hash(addr
);
1208 read_lock_bh(&addrconf_hash_lock
);
1209 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1210 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1211 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1212 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1213 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1217 read_unlock_bh(&addrconf_hash_lock
);
1221 EXPORT_SYMBOL(ipv6_chk_addr
);
1224 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1226 struct inet6_ifaddr
* ifp
;
1227 u8 hash
= ipv6_addr_hash(addr
);
1229 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1230 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1231 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1238 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1240 struct inet6_ifaddr
* ifp
;
1241 u8 hash
= ipv6_addr_hash(addr
);
1243 read_lock_bh(&addrconf_hash_lock
);
1244 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1245 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1246 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1247 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1253 read_unlock_bh(&addrconf_hash_lock
);
1258 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1260 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1261 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1262 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1263 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1264 int sk_ipv6only
= ipv6_only_sock(sk
);
1265 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1266 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1267 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1269 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1272 if (addr_type2
== IPV6_ADDR_ANY
&&
1273 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1276 if (addr_type
== IPV6_ADDR_ANY
&&
1277 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1280 if (sk2_rcv_saddr6
&&
1281 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1284 if (addr_type
== IPV6_ADDR_MAPPED
&&
1286 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1292 /* Gets referenced address, destroys ifaddr */
1294 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1296 if (ifp
->flags
&IFA_F_PERMANENT
) {
1297 spin_lock_bh(&ifp
->lock
);
1298 addrconf_del_timer(ifp
);
1299 ifp
->flags
|= IFA_F_TENTATIVE
;
1300 spin_unlock_bh(&ifp
->lock
);
1302 #ifdef CONFIG_IPV6_PRIVACY
1303 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1304 struct inet6_ifaddr
*ifpub
;
1305 spin_lock_bh(&ifp
->lock
);
1308 in6_ifa_hold(ifpub
);
1309 spin_unlock_bh(&ifp
->lock
);
1310 ipv6_create_tempaddr(ifpub
, ifp
);
1313 spin_unlock_bh(&ifp
->lock
);
1321 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1323 if (net_ratelimit())
1324 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1325 addrconf_dad_stop(ifp
);
1328 /* Join to solicited addr multicast group. */
1330 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1332 struct in6_addr maddr
;
1334 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1337 addrconf_addr_solict_mult(addr
, &maddr
);
1338 ipv6_dev_mc_inc(dev
, &maddr
);
1341 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1343 struct in6_addr maddr
;
1345 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1348 addrconf_addr_solict_mult(addr
, &maddr
);
1349 __ipv6_dev_mc_dec(idev
, &maddr
);
1352 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1354 struct in6_addr addr
;
1355 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1356 if (ipv6_addr_any(&addr
))
1358 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1361 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1363 struct in6_addr addr
;
1364 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1365 if (ipv6_addr_any(&addr
))
1367 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1370 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1372 if (dev
->addr_len
!= ETH_ALEN
)
1374 memcpy(eui
, dev
->dev_addr
, 3);
1375 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1378 * The zSeries OSA network cards can be shared among various
1379 * OS instances, but the OSA cards have only one MAC address.
1380 * This leads to duplicate address conflicts in conjunction
1381 * with IPv6 if more than one instance uses the same card.
1383 * The driver for these cards can deliver a unique 16-bit
1384 * identifier for each instance sharing the same card. It is
1385 * placed instead of 0xFFFE in the interface identifier. The
1386 * "u" bit of the interface identifier is not inverted in this
1387 * case. Hence the resulting interface identifier has local
1388 * scope according to RFC2373.
1391 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1392 eui
[4] = dev
->dev_id
& 0xFF;
1401 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1403 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1404 if (dev
->addr_len
!= ARCNET_ALEN
)
1407 eui
[7] = *(u8
*)dev
->dev_addr
;
1411 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1413 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1415 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1420 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1422 switch (dev
->type
) {
1425 case ARPHRD_IEEE802_TR
:
1426 return addrconf_ifid_eui48(eui
, dev
);
1428 return addrconf_ifid_arcnet(eui
, dev
);
1429 case ARPHRD_INFINIBAND
:
1430 return addrconf_ifid_infiniband(eui
, dev
);
1432 if (dev
->priv_flags
& IFF_ISATAP
)
1433 return ipv6_isatap_eui64(eui
, *(__be32
*)dev
->dev_addr
);
1438 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1441 struct inet6_ifaddr
*ifp
;
1443 read_lock_bh(&idev
->lock
);
1444 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1445 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1446 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1451 read_unlock_bh(&idev
->lock
);
1455 #ifdef CONFIG_IPV6_PRIVACY
1456 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1457 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1460 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1461 idev
->rndid
[0] &= ~0x02;
1464 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1465 * check if generated address is not inappropriate
1467 * - Reserved subnet anycast (RFC 2526)
1468 * 11111101 11....11 1xxxxxxx
1469 * - ISATAP (RFC4214) 6.1
1470 * 00-00-5E-FE-xx-xx-xx-xx
1472 * - XXX: already assigned to an address on the device
1474 if (idev
->rndid
[0] == 0xfd &&
1475 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1476 (idev
->rndid
[7]&0x80))
1478 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1479 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1481 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1488 static void ipv6_regen_rndid(unsigned long data
)
1490 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1491 unsigned long expires
;
1494 write_lock_bh(&idev
->lock
);
1499 if (__ipv6_regen_rndid(idev
) < 0)
1503 idev
->cnf
.temp_prefered_lft
* HZ
-
1504 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1505 if (time_before(expires
, jiffies
)) {
1507 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1512 if (!mod_timer(&idev
->regen_timer
, expires
))
1516 write_unlock_bh(&idev
->lock
);
1517 rcu_read_unlock_bh();
1521 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1524 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1525 ret
= __ipv6_regen_rndid(idev
);
1535 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1536 unsigned long expires
, u32 flags
)
1538 struct fib6_config cfg
= {
1539 .fc_table
= RT6_TABLE_PREFIX
,
1540 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1541 .fc_ifindex
= dev
->ifindex
,
1542 .fc_expires
= expires
,
1544 .fc_flags
= RTF_UP
| flags
,
1547 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1549 /* Prevent useless cloning on PtP SIT.
1550 This thing is done here expecting that the whole
1551 class of non-broadcast devices need not cloning.
1553 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1554 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1555 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1558 ip6_route_add(&cfg
);
1561 /* Create "default" multicast route to the interface */
1563 static void addrconf_add_mroute(struct net_device
*dev
)
1565 struct fib6_config cfg
= {
1566 .fc_table
= RT6_TABLE_LOCAL
,
1567 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1568 .fc_ifindex
= dev
->ifindex
,
1573 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1575 ip6_route_add(&cfg
);
1578 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1579 static void sit_route_add(struct net_device
*dev
)
1581 struct fib6_config cfg
= {
1582 .fc_table
= RT6_TABLE_MAIN
,
1583 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1584 .fc_ifindex
= dev
->ifindex
,
1586 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1589 /* prefix length - 96 bits "::d.d.d.d" */
1590 ip6_route_add(&cfg
);
1594 static void addrconf_add_lroute(struct net_device
*dev
)
1596 struct in6_addr addr
;
1598 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1599 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1602 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1604 struct inet6_dev
*idev
;
1608 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1611 /* Add default multicast route */
1612 addrconf_add_mroute(dev
);
1614 /* Add link local route */
1615 addrconf_add_lroute(dev
);
1619 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1621 struct prefix_info
*pinfo
;
1625 unsigned long rt_expires
;
1626 struct inet6_dev
*in6_dev
;
1628 pinfo
= (struct prefix_info
*) opt
;
1630 if (len
< sizeof(struct prefix_info
)) {
1631 ADBG(("addrconf: prefix option too short\n"));
1636 * Validation checks ([ADDRCONF], page 19)
1639 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1641 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1644 valid_lft
= ntohl(pinfo
->valid
);
1645 prefered_lft
= ntohl(pinfo
->prefered
);
1647 if (prefered_lft
> valid_lft
) {
1648 if (net_ratelimit())
1649 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1653 in6_dev
= in6_dev_get(dev
);
1655 if (in6_dev
== NULL
) {
1656 if (net_ratelimit())
1657 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1662 * Two things going on here:
1663 * 1) Add routes for on-link prefixes
1664 * 2) Configure prefixes with the auto flag set
1667 /* Avoid arithmetic overflow. Really, we could
1668 save rt_expires in seconds, likely valid_lft,
1669 but it would require division in fib gc, that it
1672 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1673 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1675 rt_expires
= valid_lft
* HZ
;
1678 * We convert this (in jiffies) to clock_t later.
1679 * Avoid arithmetic overflow there as well.
1680 * Overflow can happen only if HZ < USER_HZ.
1682 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1683 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1685 if (pinfo
->onlink
) {
1686 struct rt6_info
*rt
;
1687 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1689 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1690 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1691 if (valid_lft
== 0) {
1695 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1698 } else if (valid_lft
) {
1699 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1700 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1703 dst_release(&rt
->u
.dst
);
1706 /* Try to figure out our local address for this prefix */
1708 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1709 struct inet6_ifaddr
* ifp
;
1710 struct in6_addr addr
;
1711 int create
= 0, update_lft
= 0;
1713 if (pinfo
->prefix_len
== 64) {
1714 memcpy(&addr
, &pinfo
->prefix
, 8);
1715 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1716 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1717 in6_dev_put(in6_dev
);
1722 if (net_ratelimit())
1723 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1725 in6_dev_put(in6_dev
);
1730 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1732 if (ifp
== NULL
&& valid_lft
) {
1733 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1736 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1737 if (in6_dev
->cnf
.optimistic_dad
&&
1738 !ipv6_devconf
.forwarding
)
1739 addr_flags
= IFA_F_OPTIMISTIC
;
1742 /* Do not allow to create too much of autoconfigured
1743 * addresses; this would be too easy way to crash kernel.
1745 if (!max_addresses
||
1746 ipv6_count_addresses(in6_dev
) < max_addresses
)
1747 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1748 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1751 if (!ifp
|| IS_ERR(ifp
)) {
1752 in6_dev_put(in6_dev
);
1756 update_lft
= create
= 1;
1757 ifp
->cstamp
= jiffies
;
1758 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1764 #ifdef CONFIG_IPV6_PRIVACY
1765 struct inet6_ifaddr
*ift
;
1769 /* update lifetime (RFC2462 5.5.3 e) */
1770 spin_lock(&ifp
->lock
);
1772 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1773 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1776 if (!update_lft
&& stored_lft
) {
1777 if (valid_lft
> MIN_VALID_LIFETIME
||
1778 valid_lft
> stored_lft
)
1780 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1781 /* valid_lft <= stored_lft is always true */
1785 valid_lft
= MIN_VALID_LIFETIME
;
1786 if (valid_lft
< prefered_lft
)
1787 prefered_lft
= valid_lft
;
1793 ifp
->valid_lft
= valid_lft
;
1794 ifp
->prefered_lft
= prefered_lft
;
1797 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1798 spin_unlock(&ifp
->lock
);
1800 if (!(flags
&IFA_F_TENTATIVE
))
1801 ipv6_ifa_notify(0, ifp
);
1803 spin_unlock(&ifp
->lock
);
1805 #ifdef CONFIG_IPV6_PRIVACY
1806 read_lock_bh(&in6_dev
->lock
);
1807 /* update all temporary addresses in the list */
1808 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1810 * When adjusting the lifetimes of an existing
1811 * temporary address, only lower the lifetimes.
1812 * Implementations must not increase the
1813 * lifetimes of an existing temporary address
1814 * when processing a Prefix Information Option.
1816 spin_lock(&ift
->lock
);
1818 if (ift
->valid_lft
> valid_lft
&&
1819 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1820 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1821 if (ift
->prefered_lft
> prefered_lft
&&
1822 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1823 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1824 spin_unlock(&ift
->lock
);
1825 if (!(flags
&IFA_F_TENTATIVE
))
1826 ipv6_ifa_notify(0, ift
);
1829 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1831 * When a new public address is created as described in [ADDRCONF],
1832 * also create a new temporary address.
1834 read_unlock_bh(&in6_dev
->lock
);
1835 ipv6_create_tempaddr(ifp
, NULL
);
1837 read_unlock_bh(&in6_dev
->lock
);
1844 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1845 in6_dev_put(in6_dev
);
1849 * Set destination address.
1850 * Special case for SIT interfaces where we create a new "virtual"
1853 int addrconf_set_dstaddr(void __user
*arg
)
1855 struct in6_ifreq ireq
;
1856 struct net_device
*dev
;
1862 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1865 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1871 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1872 if (dev
->type
== ARPHRD_SIT
) {
1875 struct ip_tunnel_parm p
;
1877 err
= -EADDRNOTAVAIL
;
1878 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1881 memset(&p
, 0, sizeof(p
));
1882 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1886 p
.iph
.protocol
= IPPROTO_IPV6
;
1888 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1890 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1891 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1896 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1898 err
= dev_open(dev
);
1909 * Manual configuration of address on an interface
1911 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1912 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1914 struct inet6_ifaddr
*ifp
;
1915 struct inet6_dev
*idev
;
1916 struct net_device
*dev
;
1918 u32 flags
= RTF_EXPIRES
;
1922 /* check the lifetime */
1923 if (!valid_lft
|| prefered_lft
> valid_lft
)
1926 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1929 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1932 scope
= ipv6_addr_scope(pfx
);
1934 if (valid_lft
== INFINITY_LIFE_TIME
) {
1935 ifa_flags
|= IFA_F_PERMANENT
;
1937 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1938 valid_lft
= 0x7FFFFFFF/HZ
;
1940 if (prefered_lft
== 0)
1941 ifa_flags
|= IFA_F_DEPRECATED
;
1942 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1943 (prefered_lft
!= INFINITY_LIFE_TIME
))
1944 prefered_lft
= 0x7FFFFFFF/HZ
;
1946 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1949 spin_lock_bh(&ifp
->lock
);
1950 ifp
->valid_lft
= valid_lft
;
1951 ifp
->prefered_lft
= prefered_lft
;
1952 ifp
->tstamp
= jiffies
;
1953 spin_unlock_bh(&ifp
->lock
);
1955 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1956 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1958 * Note that section 3.1 of RFC 4429 indicates
1959 * that the Optimistic flag should not be set for
1960 * manually configured addresses
1962 addrconf_dad_start(ifp
, 0);
1968 return PTR_ERR(ifp
);
1971 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1973 struct inet6_ifaddr
*ifp
;
1974 struct inet6_dev
*idev
;
1975 struct net_device
*dev
;
1977 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1980 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1983 read_lock_bh(&idev
->lock
);
1984 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1985 if (ifp
->prefix_len
== plen
&&
1986 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1988 read_unlock_bh(&idev
->lock
);
1992 /* If the last address is deleted administratively,
1993 disable IPv6 on this interface.
1995 if (idev
->addr_list
== NULL
)
1996 addrconf_ifdown(idev
->dev
, 1);
2000 read_unlock_bh(&idev
->lock
);
2001 return -EADDRNOTAVAIL
;
2005 int addrconf_add_ifaddr(void __user
*arg
)
2007 struct in6_ifreq ireq
;
2010 if (!capable(CAP_NET_ADMIN
))
2013 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2017 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
2018 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2023 int addrconf_del_ifaddr(void __user
*arg
)
2025 struct in6_ifreq ireq
;
2028 if (!capable(CAP_NET_ADMIN
))
2031 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2035 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2040 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2041 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2043 struct inet6_ifaddr
* ifp
;
2044 struct in6_addr addr
;
2045 struct net_device
*dev
;
2050 memset(&addr
, 0, sizeof(struct in6_addr
));
2051 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2053 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2054 addr
.s6_addr32
[0] = htonl(0xfe800000);
2057 scope
= IPV6_ADDR_COMPATv4
;
2060 if (addr
.s6_addr32
[3]) {
2061 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2063 spin_lock_bh(&ifp
->lock
);
2064 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2065 spin_unlock_bh(&ifp
->lock
);
2066 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2072 for_each_netdev(&init_net
, dev
) {
2073 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2074 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2075 struct in_ifaddr
* ifa
;
2079 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2082 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2084 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2086 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2087 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2091 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2096 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2099 spin_lock_bh(&ifp
->lock
);
2100 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2101 spin_unlock_bh(&ifp
->lock
);
2102 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2111 static void init_loopback(struct net_device
*dev
)
2113 struct inet6_dev
*idev
;
2114 struct inet6_ifaddr
* ifp
;
2120 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2121 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2125 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2127 spin_lock_bh(&ifp
->lock
);
2128 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2129 spin_unlock_bh(&ifp
->lock
);
2130 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2135 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2137 struct inet6_ifaddr
* ifp
;
2138 u32 addr_flags
= IFA_F_PERMANENT
;
2140 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2141 if (idev
->cnf
.optimistic_dad
&&
2142 !ipv6_devconf
.forwarding
)
2143 addr_flags
|= IFA_F_OPTIMISTIC
;
2147 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2149 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2150 addrconf_dad_start(ifp
, 0);
2155 static void addrconf_dev_config(struct net_device
*dev
)
2157 struct in6_addr addr
;
2158 struct inet6_dev
* idev
;
2162 if ((dev
->type
!= ARPHRD_ETHER
) &&
2163 (dev
->type
!= ARPHRD_FDDI
) &&
2164 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2165 (dev
->type
!= ARPHRD_ARCNET
) &&
2166 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2167 /* Alas, we support only Ethernet autoconfiguration. */
2171 idev
= addrconf_add_dev(dev
);
2175 memset(&addr
, 0, sizeof(struct in6_addr
));
2176 addr
.s6_addr32
[0] = htonl(0xFE800000);
2178 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2179 addrconf_add_linklocal(idev
, &addr
);
2182 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2183 static void addrconf_sit_config(struct net_device
*dev
)
2185 struct inet6_dev
*idev
;
2190 * Configure the tunnel with one of our IPv4
2191 * addresses... we should configure all of
2192 * our v4 addrs in the tunnel
2195 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2196 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2200 if (dev
->priv_flags
& IFF_ISATAP
) {
2201 struct in6_addr addr
;
2203 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2204 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2205 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2206 addrconf_add_linklocal(idev
, &addr
);
2210 sit_add_v4_addrs(idev
);
2212 if (dev
->flags
&IFF_POINTOPOINT
) {
2213 addrconf_add_mroute(dev
);
2214 addrconf_add_lroute(dev
);
2221 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2223 struct in6_addr lladdr
;
2225 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2226 addrconf_add_linklocal(idev
, &lladdr
);
2232 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2234 struct net_device
*link_dev
;
2236 /* first try to inherit the link-local address from the link device */
2237 if (idev
->dev
->iflink
&&
2238 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2239 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2242 /* then try to inherit it from any device */
2243 for_each_netdev(&init_net
, link_dev
) {
2244 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2247 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2251 * Autoconfigure tunnel with a link-local address so routing protocols,
2252 * DHCPv6, MLD etc. can be run over the virtual link
2255 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2257 struct inet6_dev
*idev
;
2261 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2262 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2265 ip6_tnl_add_linklocal(idev
);
2268 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2271 struct net_device
*dev
= (struct net_device
*) data
;
2272 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2273 int run_pending
= 0;
2276 if (dev
->nd_net
!= &init_net
)
2280 case NETDEV_REGISTER
:
2281 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2282 idev
= ipv6_add_dev(dev
);
2284 return notifier_from_errno(-ENOMEM
);
2289 if (dev
->flags
& IFF_SLAVE
)
2292 if (event
== NETDEV_UP
) {
2293 if (!addrconf_qdisc_ok(dev
)) {
2294 /* device is not ready yet. */
2296 "ADDRCONF(NETDEV_UP): %s: "
2297 "link is not ready\n",
2302 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2303 idev
= ipv6_add_dev(dev
);
2306 idev
->if_flags
|= IF_READY
;
2308 if (!addrconf_qdisc_ok(dev
)) {
2309 /* device is still not ready. */
2314 if (idev
->if_flags
& IF_READY
) {
2315 /* device is already configured. */
2318 idev
->if_flags
|= IF_READY
;
2322 "ADDRCONF(NETDEV_CHANGE): %s: "
2323 "link becomes ready\n",
2330 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2332 addrconf_sit_config(dev
);
2335 case ARPHRD_TUNNEL6
:
2336 addrconf_ip6_tnl_config(dev
);
2338 case ARPHRD_LOOPBACK
:
2343 addrconf_dev_config(dev
);
2348 addrconf_dad_run(idev
);
2350 /* If the MTU changed during the interface down, when the
2351 interface up, the changed MTU must be reflected in the
2352 idev as well as routers.
2354 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2355 rt6_mtu_change(dev
, dev
->mtu
);
2356 idev
->cnf
.mtu6
= dev
->mtu
;
2358 idev
->tstamp
= jiffies
;
2359 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2360 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2361 stop IPv6 on this interface.
2363 if (dev
->mtu
< IPV6_MIN_MTU
)
2364 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2368 case NETDEV_CHANGEMTU
:
2369 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2370 rt6_mtu_change(dev
, dev
->mtu
);
2371 idev
->cnf
.mtu6
= dev
->mtu
;
2375 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2376 idev
= ipv6_add_dev(dev
);
2381 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2384 case NETDEV_UNREGISTER
:
2386 * Remove all addresses from this interface.
2388 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2391 case NETDEV_CHANGENAME
:
2393 snmp6_unregister_dev(idev
);
2394 #ifdef CONFIG_SYSCTL
2395 addrconf_sysctl_unregister(&idev
->cnf
);
2396 neigh_sysctl_unregister(idev
->nd_parms
);
2397 neigh_sysctl_register(dev
, idev
->nd_parms
,
2398 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2399 &ndisc_ifinfo_sysctl_change
,
2401 addrconf_sysctl_register(idev
);
2403 err
= snmp6_register_dev(idev
);
2405 return notifier_from_errno(err
);
2414 * addrconf module should be notified of a device going up
2416 static struct notifier_block ipv6_dev_notf
= {
2417 .notifier_call
= addrconf_notify
,
2421 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2423 struct inet6_dev
*idev
;
2424 struct inet6_ifaddr
*ifa
, **bifa
;
2429 if (dev
== init_net
.loopback_dev
&& how
== 1)
2433 neigh_ifdown(&nd_tbl
, dev
);
2435 idev
= __in6_dev_get(dev
);
2439 /* Step 1: remove reference to ipv6 device from parent device.
2445 /* protected by rtnl_lock */
2446 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2448 /* Step 1.5: remove snmp6 entry */
2449 snmp6_unregister_dev(idev
);
2453 /* Step 2: clear hash table */
2454 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2455 bifa
= &inet6_addr_lst
[i
];
2457 write_lock_bh(&addrconf_hash_lock
);
2458 while ((ifa
= *bifa
) != NULL
) {
2459 if (ifa
->idev
== idev
) {
2460 *bifa
= ifa
->lst_next
;
2461 ifa
->lst_next
= NULL
;
2462 addrconf_del_timer(ifa
);
2466 bifa
= &ifa
->lst_next
;
2468 write_unlock_bh(&addrconf_hash_lock
);
2471 write_lock_bh(&idev
->lock
);
2473 /* Step 3: clear flags for stateless addrconf */
2475 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2477 /* Step 4: clear address list */
2478 #ifdef CONFIG_IPV6_PRIVACY
2479 if (how
== 1 && del_timer(&idev
->regen_timer
))
2482 /* clear tempaddr list */
2483 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2484 idev
->tempaddr_list
= ifa
->tmp_next
;
2485 ifa
->tmp_next
= NULL
;
2487 write_unlock_bh(&idev
->lock
);
2488 spin_lock_bh(&ifa
->lock
);
2491 in6_ifa_put(ifa
->ifpub
);
2494 spin_unlock_bh(&ifa
->lock
);
2496 write_lock_bh(&idev
->lock
);
2499 while ((ifa
= idev
->addr_list
) != NULL
) {
2500 idev
->addr_list
= ifa
->if_next
;
2501 ifa
->if_next
= NULL
;
2503 addrconf_del_timer(ifa
);
2504 write_unlock_bh(&idev
->lock
);
2506 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2507 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2510 write_lock_bh(&idev
->lock
);
2512 write_unlock_bh(&idev
->lock
);
2514 /* Step 5: Discard multicast list */
2517 ipv6_mc_destroy_dev(idev
);
2521 idev
->tstamp
= jiffies
;
2523 /* Shot the device (if unregistered) */
2526 #ifdef CONFIG_SYSCTL
2527 addrconf_sysctl_unregister(&idev
->cnf
);
2528 neigh_sysctl_unregister(idev
->nd_parms
);
2530 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2531 neigh_ifdown(&nd_tbl
, dev
);
2537 static void addrconf_rs_timer(unsigned long data
)
2539 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2541 if (ifp
->idev
->cnf
.forwarding
)
2544 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2546 * Announcement received after solicitation
2552 spin_lock(&ifp
->lock
);
2553 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2554 struct in6_addr all_routers
;
2556 /* The wait after the last probe can be shorter */
2557 addrconf_mod_timer(ifp
, AC_RS
,
2558 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2559 ifp
->idev
->cnf
.rtr_solicit_delay
:
2560 ifp
->idev
->cnf
.rtr_solicit_interval
);
2561 spin_unlock(&ifp
->lock
);
2563 ipv6_addr_all_routers(&all_routers
);
2565 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2567 spin_unlock(&ifp
->lock
);
2569 * Note: we do not support deprecated "all on-link"
2570 * assumption any longer.
2572 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2573 ifp
->idev
->dev
->name
);
2581 * Duplicate Address Detection
2583 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2585 unsigned long rand_num
;
2586 struct inet6_dev
*idev
= ifp
->idev
;
2588 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2591 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2593 ifp
->probes
= idev
->cnf
.dad_transmits
;
2594 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2597 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2599 struct inet6_dev
*idev
= ifp
->idev
;
2600 struct net_device
*dev
= idev
->dev
;
2602 addrconf_join_solict(dev
, &ifp
->addr
);
2604 net_srandom(ifp
->addr
.s6_addr32
[3]);
2606 read_lock_bh(&idev
->lock
);
2609 spin_lock_bh(&ifp
->lock
);
2611 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2612 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2613 ifp
->flags
& IFA_F_NODAD
) {
2614 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2615 spin_unlock_bh(&ifp
->lock
);
2616 read_unlock_bh(&idev
->lock
);
2618 addrconf_dad_completed(ifp
);
2622 if (!(idev
->if_flags
& IF_READY
)) {
2623 spin_unlock_bh(&ifp
->lock
);
2624 read_unlock_bh(&idev
->lock
);
2626 * If the defice is not ready:
2627 * - keep it tentative if it is a permanent address.
2628 * - otherwise, kill it.
2631 addrconf_dad_stop(ifp
);
2636 * Optimistic nodes can start receiving
2639 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2640 ip6_ins_rt(ifp
->rt
);
2642 addrconf_dad_kick(ifp
);
2643 spin_unlock_bh(&ifp
->lock
);
2645 read_unlock_bh(&idev
->lock
);
2648 static void addrconf_dad_timer(unsigned long data
)
2650 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2651 struct inet6_dev
*idev
= ifp
->idev
;
2652 struct in6_addr unspec
;
2653 struct in6_addr mcaddr
;
2655 read_lock_bh(&idev
->lock
);
2657 read_unlock_bh(&idev
->lock
);
2660 spin_lock_bh(&ifp
->lock
);
2661 if (ifp
->probes
== 0) {
2663 * DAD was successful
2666 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2667 spin_unlock_bh(&ifp
->lock
);
2668 read_unlock_bh(&idev
->lock
);
2670 addrconf_dad_completed(ifp
);
2676 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2677 spin_unlock_bh(&ifp
->lock
);
2678 read_unlock_bh(&idev
->lock
);
2680 /* send a neighbour solicitation for our addr */
2681 memset(&unspec
, 0, sizeof(unspec
));
2682 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2683 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2688 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2690 struct net_device
* dev
= ifp
->idev
->dev
;
2693 * Configure the address for reception. Now it is valid.
2696 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2698 /* If added prefix is link local and forwarding is off,
2699 start sending router solicitations.
2702 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2703 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2704 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2705 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2706 struct in6_addr all_routers
;
2708 ipv6_addr_all_routers(&all_routers
);
2711 * If a host as already performed a random delay
2712 * [...] as part of DAD [...] there is no need
2713 * to delay again before sending the first RS
2715 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2717 spin_lock_bh(&ifp
->lock
);
2719 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2720 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2721 spin_unlock_bh(&ifp
->lock
);
2725 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2726 struct inet6_ifaddr
*ifp
;
2728 read_lock_bh(&idev
->lock
);
2729 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2730 spin_lock_bh(&ifp
->lock
);
2731 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2732 spin_unlock_bh(&ifp
->lock
);
2735 spin_unlock_bh(&ifp
->lock
);
2736 addrconf_dad_kick(ifp
);
2738 read_unlock_bh(&idev
->lock
);
2741 #ifdef CONFIG_PROC_FS
2742 struct if6_iter_state
{
2746 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2748 struct inet6_ifaddr
*ifa
= NULL
;
2749 struct if6_iter_state
*state
= seq
->private;
2751 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2752 ifa
= inet6_addr_lst
[state
->bucket
];
2759 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2761 struct if6_iter_state
*state
= seq
->private;
2763 ifa
= ifa
->lst_next
;
2765 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2766 ifa
= inet6_addr_lst
[state
->bucket
];
2772 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2774 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2777 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2779 return pos
? NULL
: ifa
;
2782 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2784 read_lock_bh(&addrconf_hash_lock
);
2785 return if6_get_idx(seq
, *pos
);
2788 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2790 struct inet6_ifaddr
*ifa
;
2792 ifa
= if6_get_next(seq
, v
);
2797 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2799 read_unlock_bh(&addrconf_hash_lock
);
2802 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2804 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2806 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2808 ifp
->idev
->dev
->ifindex
,
2812 ifp
->idev
->dev
->name
);
2816 static const struct seq_operations if6_seq_ops
= {
2817 .start
= if6_seq_start
,
2818 .next
= if6_seq_next
,
2819 .show
= if6_seq_show
,
2820 .stop
= if6_seq_stop
,
2823 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2825 return seq_open_private(file
, &if6_seq_ops
,
2826 sizeof(struct if6_iter_state
));
2829 static const struct file_operations if6_fops
= {
2830 .owner
= THIS_MODULE
,
2831 .open
= if6_seq_open
,
2833 .llseek
= seq_lseek
,
2834 .release
= seq_release_private
,
2837 int __init
if6_proc_init(void)
2839 if (!proc_net_fops_create(&init_net
, "if_inet6", S_IRUGO
, &if6_fops
))
2844 void if6_proc_exit(void)
2846 proc_net_remove(&init_net
, "if_inet6");
2848 #endif /* CONFIG_PROC_FS */
2850 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2851 /* Check if address is a home address configured on any interface. */
2852 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2855 struct inet6_ifaddr
* ifp
;
2856 u8 hash
= ipv6_addr_hash(addr
);
2857 read_lock_bh(&addrconf_hash_lock
);
2858 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2859 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2860 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2865 read_unlock_bh(&addrconf_hash_lock
);
2871 * Periodic address status verification
2874 static void addrconf_verify(unsigned long foo
)
2876 struct inet6_ifaddr
*ifp
;
2877 unsigned long now
, next
;
2880 spin_lock_bh(&addrconf_verify_lock
);
2882 next
= now
+ ADDR_CHECK_FREQUENCY
;
2884 del_timer(&addr_chk_timer
);
2886 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2889 read_lock(&addrconf_hash_lock
);
2890 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2892 #ifdef CONFIG_IPV6_PRIVACY
2893 unsigned long regen_advance
;
2896 if (ifp
->flags
& IFA_F_PERMANENT
)
2899 spin_lock(&ifp
->lock
);
2900 age
= (now
- ifp
->tstamp
) / HZ
;
2902 #ifdef CONFIG_IPV6_PRIVACY
2903 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2904 ifp
->idev
->cnf
.dad_transmits
*
2905 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2908 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2909 age
>= ifp
->valid_lft
) {
2910 spin_unlock(&ifp
->lock
);
2912 read_unlock(&addrconf_hash_lock
);
2915 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2916 spin_unlock(&ifp
->lock
);
2918 } else if (age
>= ifp
->prefered_lft
) {
2919 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2922 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2924 ifp
->flags
|= IFA_F_DEPRECATED
;
2927 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2928 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2930 spin_unlock(&ifp
->lock
);
2934 read_unlock(&addrconf_hash_lock
);
2936 ipv6_ifa_notify(0, ifp
);
2940 #ifdef CONFIG_IPV6_PRIVACY
2941 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2942 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2943 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2944 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2945 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2946 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2947 if (!ifp
->regen_count
&& ifpub
) {
2950 in6_ifa_hold(ifpub
);
2951 spin_unlock(&ifp
->lock
);
2952 read_unlock(&addrconf_hash_lock
);
2953 spin_lock(&ifpub
->lock
);
2954 ifpub
->regen_count
= 0;
2955 spin_unlock(&ifpub
->lock
);
2956 ipv6_create_tempaddr(ifpub
, ifp
);
2961 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2962 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2963 spin_unlock(&ifp
->lock
);
2966 /* ifp->prefered_lft <= ifp->valid_lft */
2967 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2968 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2969 spin_unlock(&ifp
->lock
);
2972 read_unlock(&addrconf_hash_lock
);
2975 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2976 add_timer(&addr_chk_timer
);
2977 spin_unlock_bh(&addrconf_verify_lock
);
2980 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2982 struct in6_addr
*pfx
= NULL
;
2985 pfx
= nla_data(addr
);
2988 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2991 pfx
= nla_data(local
);
2997 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
2998 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2999 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3000 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3004 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3006 struct net
*net
= skb
->sk
->sk_net
;
3007 struct ifaddrmsg
*ifm
;
3008 struct nlattr
*tb
[IFA_MAX
+1];
3009 struct in6_addr
*pfx
;
3012 if (net
!= &init_net
)
3015 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3019 ifm
= nlmsg_data(nlh
);
3020 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3024 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3027 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3028 u32 prefered_lft
, u32 valid_lft
)
3030 u32 flags
= RTF_EXPIRES
;
3032 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3035 if (valid_lft
== INFINITY_LIFE_TIME
) {
3036 ifa_flags
|= IFA_F_PERMANENT
;
3038 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3039 valid_lft
= 0x7FFFFFFF/HZ
;
3041 if (prefered_lft
== 0)
3042 ifa_flags
|= IFA_F_DEPRECATED
;
3043 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3044 (prefered_lft
!= INFINITY_LIFE_TIME
))
3045 prefered_lft
= 0x7FFFFFFF/HZ
;
3047 spin_lock_bh(&ifp
->lock
);
3048 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3049 ifp
->tstamp
= jiffies
;
3050 ifp
->valid_lft
= valid_lft
;
3051 ifp
->prefered_lft
= prefered_lft
;
3053 spin_unlock_bh(&ifp
->lock
);
3054 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3055 ipv6_ifa_notify(0, ifp
);
3057 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3058 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3065 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3067 struct net
*net
= skb
->sk
->sk_net
;
3068 struct ifaddrmsg
*ifm
;
3069 struct nlattr
*tb
[IFA_MAX
+1];
3070 struct in6_addr
*pfx
;
3071 struct inet6_ifaddr
*ifa
;
3072 struct net_device
*dev
;
3073 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3077 if (net
!= &init_net
)
3080 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3084 ifm
= nlmsg_data(nlh
);
3085 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3089 if (tb
[IFA_CACHEINFO
]) {
3090 struct ifa_cacheinfo
*ci
;
3092 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3093 valid_lft
= ci
->ifa_valid
;
3094 preferred_lft
= ci
->ifa_prefered
;
3096 preferred_lft
= INFINITY_LIFE_TIME
;
3097 valid_lft
= INFINITY_LIFE_TIME
;
3100 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3104 /* We ignore other flags so far. */
3105 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3107 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3110 * It would be best to check for !NLM_F_CREATE here but
3111 * userspace alreay relies on not having to provide this.
3113 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3114 ifa_flags
, preferred_lft
, valid_lft
);
3117 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3118 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3121 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3128 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3129 u8 scope
, int ifindex
)
3131 struct ifaddrmsg
*ifm
;
3133 ifm
= nlmsg_data(nlh
);
3134 ifm
->ifa_family
= AF_INET6
;
3135 ifm
->ifa_prefixlen
= prefixlen
;
3136 ifm
->ifa_flags
= flags
;
3137 ifm
->ifa_scope
= scope
;
3138 ifm
->ifa_index
= ifindex
;
3141 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3142 unsigned long tstamp
, u32 preferred
, u32 valid
)
3144 struct ifa_cacheinfo ci
;
3146 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3147 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3148 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3149 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3150 ci
.ifa_prefered
= preferred
;
3151 ci
.ifa_valid
= valid
;
3153 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3156 static inline int rt_scope(int ifa_scope
)
3158 if (ifa_scope
& IFA_HOST
)
3159 return RT_SCOPE_HOST
;
3160 else if (ifa_scope
& IFA_LINK
)
3161 return RT_SCOPE_LINK
;
3162 else if (ifa_scope
& IFA_SITE
)
3163 return RT_SCOPE_SITE
;
3165 return RT_SCOPE_UNIVERSE
;
3168 static inline int inet6_ifaddr_msgsize(void)
3170 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3171 + nla_total_size(16) /* IFA_ADDRESS */
3172 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3175 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3176 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3178 struct nlmsghdr
*nlh
;
3179 u32 preferred
, valid
;
3181 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3185 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3186 ifa
->idev
->dev
->ifindex
);
3188 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3189 preferred
= ifa
->prefered_lft
;
3190 valid
= ifa
->valid_lft
;
3191 if (preferred
!= INFINITY_LIFE_TIME
) {
3192 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3194 if (valid
!= INFINITY_LIFE_TIME
)
3198 preferred
= INFINITY_LIFE_TIME
;
3199 valid
= INFINITY_LIFE_TIME
;
3202 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3203 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3204 nlmsg_cancel(skb
, nlh
);
3208 return nlmsg_end(skb
, nlh
);
3211 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3212 u32 pid
, u32 seq
, int event
, u16 flags
)
3214 struct nlmsghdr
*nlh
;
3215 u8 scope
= RT_SCOPE_UNIVERSE
;
3216 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3218 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3219 scope
= RT_SCOPE_SITE
;
3221 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3225 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3226 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3227 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3228 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3229 nlmsg_cancel(skb
, nlh
);
3233 return nlmsg_end(skb
, nlh
);
3236 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3237 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3239 struct nlmsghdr
*nlh
;
3240 u8 scope
= RT_SCOPE_UNIVERSE
;
3241 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3243 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3244 scope
= RT_SCOPE_SITE
;
3246 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3250 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3251 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3252 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3253 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3254 nlmsg_cancel(skb
, nlh
);
3258 return nlmsg_end(skb
, nlh
);
3268 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3269 enum addr_type_t type
)
3272 int s_idx
, s_ip_idx
;
3274 struct net_device
*dev
;
3275 struct inet6_dev
*idev
= NULL
;
3276 struct inet6_ifaddr
*ifa
;
3277 struct ifmcaddr6
*ifmca
;
3278 struct ifacaddr6
*ifaca
;
3280 s_idx
= cb
->args
[0];
3281 s_ip_idx
= ip_idx
= cb
->args
[1];
3284 for_each_netdev(&init_net
, dev
) {
3290 if ((idev
= in6_dev_get(dev
)) == NULL
)
3292 read_lock_bh(&idev
->lock
);
3295 /* unicast address incl. temp addr */
3296 for (ifa
= idev
->addr_list
; ifa
;
3297 ifa
= ifa
->if_next
, ip_idx
++) {
3298 if (ip_idx
< s_ip_idx
)
3300 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3301 NETLINK_CB(cb
->skb
).pid
,
3302 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3307 case MULTICAST_ADDR
:
3308 /* multicast address */
3309 for (ifmca
= idev
->mc_list
; ifmca
;
3310 ifmca
= ifmca
->next
, ip_idx
++) {
3311 if (ip_idx
< s_ip_idx
)
3313 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3314 NETLINK_CB(cb
->skb
).pid
,
3315 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3321 /* anycast address */
3322 for (ifaca
= idev
->ac_list
; ifaca
;
3323 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3324 if (ip_idx
< s_ip_idx
)
3326 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3327 NETLINK_CB(cb
->skb
).pid
,
3328 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3336 read_unlock_bh(&idev
->lock
);
3343 read_unlock_bh(&idev
->lock
);
3347 cb
->args
[1] = ip_idx
;
3351 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3353 struct net
*net
= skb
->sk
->sk_net
;
3354 enum addr_type_t type
= UNICAST_ADDR
;
3356 if (net
!= &init_net
)
3359 return inet6_dump_addr(skb
, cb
, type
);
3362 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3364 struct net
*net
= skb
->sk
->sk_net
;
3365 enum addr_type_t type
= MULTICAST_ADDR
;
3367 if (net
!= &init_net
)
3370 return inet6_dump_addr(skb
, cb
, type
);
3374 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3376 struct net
*net
= skb
->sk
->sk_net
;
3377 enum addr_type_t type
= ANYCAST_ADDR
;
3379 if (net
!= &init_net
)
3382 return inet6_dump_addr(skb
, cb
, type
);
3385 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3388 struct net
*net
= in_skb
->sk
->sk_net
;
3389 struct ifaddrmsg
*ifm
;
3390 struct nlattr
*tb
[IFA_MAX
+1];
3391 struct in6_addr
*addr
= NULL
;
3392 struct net_device
*dev
= NULL
;
3393 struct inet6_ifaddr
*ifa
;
3394 struct sk_buff
*skb
;
3397 if (net
!= &init_net
)
3400 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3404 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3410 ifm
= nlmsg_data(nlh
);
3412 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3414 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3415 err
= -EADDRNOTAVAIL
;
3419 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3424 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3425 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3427 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3428 WARN_ON(err
== -EMSGSIZE
);
3432 err
= rtnl_unicast(skb
, &init_net
, NETLINK_CB(in_skb
).pid
);
3439 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3441 struct sk_buff
*skb
;
3444 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3448 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3450 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3451 WARN_ON(err
== -EMSGSIZE
);
3455 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3458 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3461 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3462 __s32
*array
, int bytes
)
3464 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3466 memset(array
, 0, bytes
);
3467 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3468 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3469 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3470 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3471 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3472 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3473 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3474 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3475 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3476 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3477 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3478 #ifdef CONFIG_IPV6_PRIVACY
3479 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3480 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3481 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3482 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3483 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3485 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3486 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3487 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3488 #ifdef CONFIG_IPV6_ROUTER_PREF
3489 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3490 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3491 #ifdef CONFIG_IPV6_ROUTE_INFO
3492 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3495 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3496 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3497 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3498 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3502 static inline size_t inet6_if_nlmsg_size(void)
3504 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3505 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3506 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3507 + nla_total_size(4) /* IFLA_MTU */
3508 + nla_total_size(4) /* IFLA_LINK */
3509 + nla_total_size( /* IFLA_PROTINFO */
3510 nla_total_size(4) /* IFLA_INET6_FLAGS */
3511 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3512 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3513 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3514 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3518 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3522 int pad
= bytes
- sizeof(u64
) * items
;
3525 /* Use put_unaligned() because stats may not be aligned for u64. */
3526 put_unaligned(items
, &stats
[0]);
3527 for (i
= 1; i
< items
; i
++)
3528 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3530 memset(&stats
[items
], 0, pad
);
3533 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3537 case IFLA_INET6_STATS
:
3538 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3540 case IFLA_INET6_ICMP6STATS
:
3541 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3546 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3547 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3549 struct net_device
*dev
= idev
->dev
;
3551 struct ifinfomsg
*hdr
;
3552 struct nlmsghdr
*nlh
;
3554 struct ifla_cacheinfo ci
;
3556 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3560 hdr
= nlmsg_data(nlh
);
3561 hdr
->ifi_family
= AF_INET6
;
3563 hdr
->ifi_type
= dev
->type
;
3564 hdr
->ifi_index
= dev
->ifindex
;
3565 hdr
->ifi_flags
= dev_get_flags(dev
);
3566 hdr
->ifi_change
= 0;
3568 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3571 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3573 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3574 if (dev
->ifindex
!= dev
->iflink
)
3575 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3577 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3578 if (protoinfo
== NULL
)
3579 goto nla_put_failure
;
3581 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3583 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3584 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3585 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3586 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3587 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3588 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3590 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3592 goto nla_put_failure
;
3593 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3595 /* XXX - MC not implemented */
3597 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3599 goto nla_put_failure
;
3600 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3602 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3604 goto nla_put_failure
;
3605 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3607 nla_nest_end(skb
, protoinfo
);
3608 return nlmsg_end(skb
, nlh
);
3611 nlmsg_cancel(skb
, nlh
);
3615 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3617 struct net
*net
= skb
->sk
->sk_net
;
3619 int s_idx
= cb
->args
[0];
3620 struct net_device
*dev
;
3621 struct inet6_dev
*idev
;
3623 if (net
!= &init_net
)
3626 read_lock(&dev_base_lock
);
3628 for_each_netdev(&init_net
, dev
) {
3631 if ((idev
= in6_dev_get(dev
)) == NULL
)
3633 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3634 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3641 read_unlock(&dev_base_lock
);
3647 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3649 struct sk_buff
*skb
;
3652 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3656 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3658 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3659 WARN_ON(err
== -EMSGSIZE
);
3663 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3666 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3669 static inline size_t inet6_prefix_nlmsg_size(void)
3671 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3672 + nla_total_size(sizeof(struct in6_addr
))
3673 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3676 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3677 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3678 int event
, unsigned int flags
)
3680 struct prefixmsg
*pmsg
;
3681 struct nlmsghdr
*nlh
;
3682 struct prefix_cacheinfo ci
;
3684 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3688 pmsg
= nlmsg_data(nlh
);
3689 pmsg
->prefix_family
= AF_INET6
;
3690 pmsg
->prefix_pad1
= 0;
3691 pmsg
->prefix_pad2
= 0;
3692 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3693 pmsg
->prefix_len
= pinfo
->prefix_len
;
3694 pmsg
->prefix_type
= pinfo
->type
;
3695 pmsg
->prefix_pad3
= 0;
3696 pmsg
->prefix_flags
= 0;
3698 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3699 if (pinfo
->autoconf
)
3700 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3702 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3704 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3705 ci
.valid_time
= ntohl(pinfo
->valid
);
3706 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3708 return nlmsg_end(skb
, nlh
);
3711 nlmsg_cancel(skb
, nlh
);
3715 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3716 struct prefix_info
*pinfo
)
3718 struct sk_buff
*skb
;
3721 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3725 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3727 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3728 WARN_ON(err
== -EMSGSIZE
);
3732 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3735 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_PREFIX
, err
);
3738 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3740 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3745 * If the address was optimistic
3746 * we inserted the route at the start of
3747 * our DAD process, so we don't need
3750 if (!(ifp
->rt
->rt6i_node
))
3751 ip6_ins_rt(ifp
->rt
);
3752 if (ifp
->idev
->cnf
.forwarding
)
3753 addrconf_join_anycast(ifp
);
3756 if (ifp
->idev
->cnf
.forwarding
)
3757 addrconf_leave_anycast(ifp
);
3758 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3759 dst_hold(&ifp
->rt
->u
.dst
);
3760 if (ip6_del_rt(ifp
->rt
))
3761 dst_free(&ifp
->rt
->u
.dst
);
3766 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3769 if (likely(ifp
->idev
->dead
== 0))
3770 __ipv6_ifa_notify(event
, ifp
);
3771 rcu_read_unlock_bh();
3774 #ifdef CONFIG_SYSCTL
3777 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3778 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3780 int *valp
= ctl
->data
;
3784 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3787 addrconf_fixup_forwarding(ctl
, valp
, val
);
3791 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3792 int __user
*name
, int nlen
,
3793 void __user
*oldval
,
3794 size_t __user
*oldlenp
,
3795 void __user
*newval
, size_t newlen
)
3797 int *valp
= table
->data
;
3801 if (!newval
|| !newlen
)
3803 if (newlen
!= sizeof(int))
3805 if (get_user(new, (int __user
*)newval
))
3809 if (oldval
&& oldlenp
) {
3811 if (get_user(len
, oldlenp
))
3814 if (len
> table
->maxlen
)
3815 len
= table
->maxlen
;
3816 if (copy_to_user(oldval
, valp
, len
))
3818 if (put_user(len
, oldlenp
))
3824 addrconf_fixup_forwarding(table
, valp
, val
);
3828 static struct addrconf_sysctl_table
3830 struct ctl_table_header
*sysctl_header
;
3831 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3833 } addrconf_sysctl __read_mostly
= {
3834 .sysctl_header
= NULL
,
3837 .ctl_name
= NET_IPV6_FORWARDING
,
3838 .procname
= "forwarding",
3839 .data
= &ipv6_devconf
.forwarding
,
3840 .maxlen
= sizeof(int),
3842 .proc_handler
= &addrconf_sysctl_forward
,
3843 .strategy
= &addrconf_sysctl_forward_strategy
,
3846 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3847 .procname
= "hop_limit",
3848 .data
= &ipv6_devconf
.hop_limit
,
3849 .maxlen
= sizeof(int),
3851 .proc_handler
= proc_dointvec
,
3854 .ctl_name
= NET_IPV6_MTU
,
3856 .data
= &ipv6_devconf
.mtu6
,
3857 .maxlen
= sizeof(int),
3859 .proc_handler
= &proc_dointvec
,
3862 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3863 .procname
= "accept_ra",
3864 .data
= &ipv6_devconf
.accept_ra
,
3865 .maxlen
= sizeof(int),
3867 .proc_handler
= &proc_dointvec
,
3870 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3871 .procname
= "accept_redirects",
3872 .data
= &ipv6_devconf
.accept_redirects
,
3873 .maxlen
= sizeof(int),
3875 .proc_handler
= &proc_dointvec
,
3878 .ctl_name
= NET_IPV6_AUTOCONF
,
3879 .procname
= "autoconf",
3880 .data
= &ipv6_devconf
.autoconf
,
3881 .maxlen
= sizeof(int),
3883 .proc_handler
= &proc_dointvec
,
3886 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3887 .procname
= "dad_transmits",
3888 .data
= &ipv6_devconf
.dad_transmits
,
3889 .maxlen
= sizeof(int),
3891 .proc_handler
= &proc_dointvec
,
3894 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3895 .procname
= "router_solicitations",
3896 .data
= &ipv6_devconf
.rtr_solicits
,
3897 .maxlen
= sizeof(int),
3899 .proc_handler
= &proc_dointvec
,
3902 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3903 .procname
= "router_solicitation_interval",
3904 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3905 .maxlen
= sizeof(int),
3907 .proc_handler
= &proc_dointvec_jiffies
,
3908 .strategy
= &sysctl_jiffies
,
3911 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3912 .procname
= "router_solicitation_delay",
3913 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3914 .maxlen
= sizeof(int),
3916 .proc_handler
= &proc_dointvec_jiffies
,
3917 .strategy
= &sysctl_jiffies
,
3920 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3921 .procname
= "force_mld_version",
3922 .data
= &ipv6_devconf
.force_mld_version
,
3923 .maxlen
= sizeof(int),
3925 .proc_handler
= &proc_dointvec
,
3927 #ifdef CONFIG_IPV6_PRIVACY
3929 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3930 .procname
= "use_tempaddr",
3931 .data
= &ipv6_devconf
.use_tempaddr
,
3932 .maxlen
= sizeof(int),
3934 .proc_handler
= &proc_dointvec
,
3937 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3938 .procname
= "temp_valid_lft",
3939 .data
= &ipv6_devconf
.temp_valid_lft
,
3940 .maxlen
= sizeof(int),
3942 .proc_handler
= &proc_dointvec
,
3945 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3946 .procname
= "temp_prefered_lft",
3947 .data
= &ipv6_devconf
.temp_prefered_lft
,
3948 .maxlen
= sizeof(int),
3950 .proc_handler
= &proc_dointvec
,
3953 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3954 .procname
= "regen_max_retry",
3955 .data
= &ipv6_devconf
.regen_max_retry
,
3956 .maxlen
= sizeof(int),
3958 .proc_handler
= &proc_dointvec
,
3961 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3962 .procname
= "max_desync_factor",
3963 .data
= &ipv6_devconf
.max_desync_factor
,
3964 .maxlen
= sizeof(int),
3966 .proc_handler
= &proc_dointvec
,
3970 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3971 .procname
= "max_addresses",
3972 .data
= &ipv6_devconf
.max_addresses
,
3973 .maxlen
= sizeof(int),
3975 .proc_handler
= &proc_dointvec
,
3978 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3979 .procname
= "accept_ra_defrtr",
3980 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3981 .maxlen
= sizeof(int),
3983 .proc_handler
= &proc_dointvec
,
3986 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3987 .procname
= "accept_ra_pinfo",
3988 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3989 .maxlen
= sizeof(int),
3991 .proc_handler
= &proc_dointvec
,
3993 #ifdef CONFIG_IPV6_ROUTER_PREF
3995 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3996 .procname
= "accept_ra_rtr_pref",
3997 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3998 .maxlen
= sizeof(int),
4000 .proc_handler
= &proc_dointvec
,
4003 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4004 .procname
= "router_probe_interval",
4005 .data
= &ipv6_devconf
.rtr_probe_interval
,
4006 .maxlen
= sizeof(int),
4008 .proc_handler
= &proc_dointvec_jiffies
,
4009 .strategy
= &sysctl_jiffies
,
4011 #ifdef CONFIG_IPV6_ROUTE_INFO
4013 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4014 .procname
= "accept_ra_rt_info_max_plen",
4015 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4016 .maxlen
= sizeof(int),
4018 .proc_handler
= &proc_dointvec
,
4023 .ctl_name
= NET_IPV6_PROXY_NDP
,
4024 .procname
= "proxy_ndp",
4025 .data
= &ipv6_devconf
.proxy_ndp
,
4026 .maxlen
= sizeof(int),
4028 .proc_handler
= &proc_dointvec
,
4031 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4032 .procname
= "accept_source_route",
4033 .data
= &ipv6_devconf
.accept_source_route
,
4034 .maxlen
= sizeof(int),
4036 .proc_handler
= &proc_dointvec
,
4038 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4040 .ctl_name
= CTL_UNNUMBERED
,
4041 .procname
= "optimistic_dad",
4042 .data
= &ipv6_devconf
.optimistic_dad
,
4043 .maxlen
= sizeof(int),
4045 .proc_handler
= &proc_dointvec
,
4050 .ctl_name
= 0, /* sentinel */
4055 static void __addrconf_sysctl_register(char *dev_name
, int ctl_name
,
4056 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4059 struct addrconf_sysctl_table
*t
;
4061 #define ADDRCONF_CTL_PATH_DEV 3
4063 struct ctl_path addrconf_ctl_path
[] = {
4064 { .procname
= "net", .ctl_name
= CTL_NET
, },
4065 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
4066 { .procname
= "conf", .ctl_name
= NET_IPV6_CONF
, },
4067 { /* to be set */ },
4072 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4076 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4077 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4078 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4082 * Make a copy of dev_name, because '.procname' is regarded as const
4083 * by sysctl and we wouldn't want anyone to change it under our feet
4084 * (see SIOCSIFNAME).
4086 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4090 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4091 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].ctl_name
= ctl_name
;
4093 t
->sysctl_header
= register_sysctl_paths(addrconf_ctl_path
,
4095 if (t
->sysctl_header
== NULL
)
4109 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4111 __addrconf_sysctl_register(idev
->dev
->name
, idev
->dev
->ifindex
,
4115 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4118 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4120 unregister_sysctl_table(t
->sysctl_header
);
4133 int register_inet6addr_notifier(struct notifier_block
*nb
)
4135 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4138 EXPORT_SYMBOL(register_inet6addr_notifier
);
4140 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4142 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4145 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4148 * Init / cleanup code
4151 int __init
addrconf_init(void)
4155 if ((err
= ipv6_addr_label_init()) < 0) {
4156 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4161 /* The addrconf netdev notifier requires that loopback_dev
4162 * has it's ipv6 private information allocated and setup
4163 * before it can bring up and give link-local addresses
4164 * to other devices which are up.
4166 * Unfortunately, loopback_dev is not necessarily the first
4167 * entry in the global dev_base list of net devices. In fact,
4168 * it is likely to be the very last entry on that list.
4169 * So this causes the notifier registry below to try and
4170 * give link-local addresses to all devices besides loopback_dev
4171 * first, then loopback_dev, which cases all the non-loopback_dev
4172 * devices to fail to get a link-local address.
4174 * So, as a temporary fix, allocate the ipv6 structure for
4175 * loopback_dev first by hand.
4176 * Longer term, all of the dependencies ipv6 has upon the loopback
4177 * device and it being up should be removed.
4180 if (!ipv6_add_dev(init_net
.loopback_dev
))
4186 ip6_null_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4187 ip6_null_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4188 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4189 ip6_prohibit_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4190 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4191 ip6_blk_hole_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4192 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4195 register_netdevice_notifier(&ipv6_dev_notf
);
4199 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4203 /* Only the first call to __rtnl_register can fail */
4204 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4205 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4206 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4207 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4208 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4210 ipv6_addr_label_rtnl_register();
4212 #ifdef CONFIG_SYSCTL
4213 __addrconf_sysctl_register("all", NET_PROTO_CONF_ALL
,
4214 NULL
, &ipv6_devconf
);
4215 __addrconf_sysctl_register("default", NET_PROTO_CONF_DEFAULT
,
4216 NULL
, &ipv6_devconf_dflt
);
4221 unregister_netdevice_notifier(&ipv6_dev_notf
);
4226 void addrconf_cleanup(void)
4228 struct net_device
*dev
;
4229 struct inet6_ifaddr
*ifa
;
4232 unregister_netdevice_notifier(&ipv6_dev_notf
);
4234 #ifdef CONFIG_SYSCTL
4235 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4236 addrconf_sysctl_unregister(&ipv6_devconf
);
4245 for_each_netdev(&init_net
, dev
) {
4246 if (__in6_dev_get(dev
) == NULL
)
4248 addrconf_ifdown(dev
, 1);
4250 addrconf_ifdown(init_net
.loopback_dev
, 2);
4256 write_lock_bh(&addrconf_hash_lock
);
4257 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4258 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4259 struct inet6_ifaddr
*bifa
;
4262 ifa
= ifa
->lst_next
;
4263 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4264 /* Do not free it; something is wrong.
4265 Now we can investigate it with debugger.
4269 write_unlock_bh(&addrconf_hash_lock
);
4271 del_timer(&addr_chk_timer
);