2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <linux/if_tunnel.h>
78 #include <linux/rtnetlink.h>
80 #ifdef CONFIG_IPV6_PRIVACY
81 #include <linux/random.h>
84 #include <asm/uaccess.h>
85 #include <asm/unaligned.h>
87 #include <linux/proc_fs.h>
88 #include <linux/seq_file.h>
90 /* Set to 3 to get tracing... */
94 #define ADBG(x) printk x
99 #define INFINITY_LIFE_TIME 0xFFFFFFFF
100 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
103 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
104 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
107 #ifdef CONFIG_IPV6_PRIVACY
108 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
109 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
110 static void ipv6_regen_rndid(unsigned long data
);
112 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
115 static int ipv6_count_addresses(struct inet6_dev
*idev
);
118 * Configured unicast address hash table
120 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
121 static DEFINE_RWLOCK(addrconf_hash_lock
);
123 static void addrconf_verify(unsigned long);
125 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
126 static DEFINE_SPINLOCK(addrconf_verify_lock
);
128 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
129 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
131 static int addrconf_ifdown(struct net_device
*dev
, int how
);
133 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
134 static void addrconf_dad_timer(unsigned long data
);
135 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
136 static void addrconf_dad_run(struct inet6_dev
*idev
);
137 static void addrconf_rs_timer(unsigned long data
);
138 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
141 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
142 struct prefix_info
*pinfo
);
143 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
145 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
147 struct ipv6_devconf ipv6_devconf __read_mostly
= {
149 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
150 .mtu6
= IPV6_MIN_MTU
,
152 .accept_redirects
= 1,
154 .force_mld_version
= 0,
156 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
157 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
158 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
159 #ifdef CONFIG_IPV6_PRIVACY
161 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
162 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
163 .regen_max_retry
= REGEN_MAX_RETRY
,
164 .max_desync_factor
= MAX_DESYNC_FACTOR
,
166 .max_addresses
= IPV6_MAX_ADDRESSES
,
167 .accept_ra_defrtr
= 1,
168 .accept_ra_pinfo
= 1,
169 #ifdef CONFIG_IPV6_ROUTER_PREF
170 .accept_ra_rtr_pref
= 1,
171 .rtr_probe_interval
= 60 * HZ
,
172 #ifdef CONFIG_IPV6_ROUTE_INFO
173 .accept_ra_rt_info_max_plen
= 0,
177 .accept_source_route
= 0, /* we do not accept RH0 by default. */
180 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
182 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
183 .mtu6
= IPV6_MIN_MTU
,
185 .accept_redirects
= 1,
188 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
189 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
190 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
191 #ifdef CONFIG_IPV6_PRIVACY
193 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
194 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
195 .regen_max_retry
= REGEN_MAX_RETRY
,
196 .max_desync_factor
= MAX_DESYNC_FACTOR
,
198 .max_addresses
= IPV6_MAX_ADDRESSES
,
199 .accept_ra_defrtr
= 1,
200 .accept_ra_pinfo
= 1,
201 #ifdef CONFIG_IPV6_ROUTER_PREF
202 .accept_ra_rtr_pref
= 1,
203 .rtr_probe_interval
= 60 * HZ
,
204 #ifdef CONFIG_IPV6_ROUTE_INFO
205 .accept_ra_rt_info_max_plen
= 0,
209 .accept_source_route
= 0, /* we do not accept RH0 by default. */
212 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
213 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
214 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
216 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
218 if (del_timer(&ifp
->timer
))
222 enum addrconf_timer_t
229 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
230 enum addrconf_timer_t what
,
233 if (!del_timer(&ifp
->timer
))
238 ifp
->timer
.function
= addrconf_dad_timer
;
241 ifp
->timer
.function
= addrconf_rs_timer
;
245 ifp
->timer
.expires
= jiffies
+ when
;
246 add_timer(&ifp
->timer
);
249 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
253 if (!idev
|| !idev
->dev
)
256 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
257 sizeof(struct ipstats_mib
),
258 __alignof__(struct ipstats_mib
)) < 0)
260 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
261 sizeof(struct icmpv6_mib
),
262 __alignof__(struct icmpv6_mib
)) < 0)
268 snmp_mib_free((void **)idev
->stats
.ipv6
);
273 static int snmp6_free_dev(struct inet6_dev
*idev
)
275 snmp_mib_free((void **)idev
->stats
.icmpv6
);
276 snmp_mib_free((void **)idev
->stats
.ipv6
);
280 /* Nobody refers to this device, we may destroy it. */
282 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
284 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
288 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
290 struct net_device
*dev
= idev
->dev
;
291 BUG_TRAP(idev
->addr_list
==NULL
);
292 BUG_TRAP(idev
->mc_list
==NULL
);
293 #ifdef NET_REFCNT_DEBUG
294 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
298 printk("Freeing alive inet6 device %p\n", idev
);
301 snmp6_free_dev(idev
);
302 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
305 EXPORT_SYMBOL(in6_dev_finish_destroy
);
307 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
309 struct inet6_dev
*ndev
;
310 struct in6_addr maddr
;
314 if (dev
->mtu
< IPV6_MIN_MTU
)
317 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
322 rwlock_init(&ndev
->lock
);
324 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
325 ndev
->cnf
.mtu6
= dev
->mtu
;
326 ndev
->cnf
.sysctl
= NULL
;
327 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
328 if (ndev
->nd_parms
== NULL
) {
332 /* We refer to the device */
335 if (snmp6_alloc_dev(ndev
) < 0) {
337 "%s(): cannot allocate memory for statistics; dev=%s.\n",
338 __FUNCTION__
, dev
->name
));
339 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
341 in6_dev_finish_destroy(ndev
);
345 if (snmp6_register_dev(ndev
) < 0) {
347 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
348 __FUNCTION__
, dev
->name
));
349 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
351 in6_dev_finish_destroy(ndev
);
355 /* One reference from device. We must do this before
356 * we invoke __ipv6_regen_rndid().
360 #ifdef CONFIG_IPV6_PRIVACY
361 init_timer(&ndev
->regen_timer
);
362 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
363 ndev
->regen_timer
.data
= (unsigned long) ndev
;
364 if ((dev
->flags
&IFF_LOOPBACK
) ||
365 dev
->type
== ARPHRD_TUNNEL
||
366 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
367 dev
->type
== ARPHRD_SIT
||
369 dev
->type
== ARPHRD_NONE
) {
371 "%s: Disabled Privacy Extensions\n",
373 ndev
->cnf
.use_tempaddr
= -1;
376 ipv6_regen_rndid((unsigned long) ndev
);
380 if (netif_running(dev
) && netif_carrier_ok(dev
))
381 ndev
->if_flags
|= IF_READY
;
383 ipv6_mc_init_dev(ndev
);
384 ndev
->tstamp
= jiffies
;
386 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
387 NET_IPV6_NEIGH
, "ipv6",
388 &ndisc_ifinfo_sysctl_change
,
390 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
392 /* protected by rtnl_lock */
393 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
395 /* Join all-node multicast group */
396 ipv6_addr_all_nodes(&maddr
);
397 ipv6_dev_mc_inc(dev
, &maddr
);
402 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
404 struct inet6_dev
*idev
;
408 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
409 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
413 if (dev
->flags
&IFF_UP
)
419 static void dev_forward_change(struct inet6_dev
*idev
)
421 struct net_device
*dev
;
422 struct inet6_ifaddr
*ifa
;
423 struct in6_addr addr
;
428 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
429 ipv6_addr_all_routers(&addr
);
431 if (idev
->cnf
.forwarding
)
432 ipv6_dev_mc_inc(dev
, &addr
);
434 ipv6_dev_mc_dec(dev
, &addr
);
436 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
437 if (ifa
->flags
&IFA_F_TENTATIVE
)
439 if (idev
->cnf
.forwarding
)
440 addrconf_join_anycast(ifa
);
442 addrconf_leave_anycast(ifa
);
447 static void addrconf_forward_change(void)
449 struct net_device
*dev
;
450 struct inet6_dev
*idev
;
452 read_lock(&dev_base_lock
);
453 for_each_netdev(&init_net
, dev
) {
455 idev
= __in6_dev_get(dev
);
457 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
458 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
460 dev_forward_change(idev
);
464 read_unlock(&dev_base_lock
);
468 /* Nobody refers to this ifaddr, destroy it */
470 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
472 BUG_TRAP(ifp
->if_next
==NULL
);
473 BUG_TRAP(ifp
->lst_next
==NULL
);
474 #ifdef NET_REFCNT_DEBUG
475 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
478 in6_dev_put(ifp
->idev
);
480 if (del_timer(&ifp
->timer
))
481 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
484 printk("Freeing alive inet6 address %p\n", ifp
);
487 dst_release(&ifp
->rt
->u
.dst
);
493 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
495 struct inet6_ifaddr
*ifa
, **ifap
;
496 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
499 * Each device address list is sorted in order of scope -
500 * global before linklocal.
502 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
503 ifap
= &ifa
->if_next
) {
504 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
508 ifp
->if_next
= *ifap
;
512 /* On success it returns ifp with increased reference count */
514 static struct inet6_ifaddr
*
515 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
516 int scope
, u32 flags
)
518 struct inet6_ifaddr
*ifa
= NULL
;
525 err
= -ENODEV
; /*XXX*/
529 write_lock(&addrconf_hash_lock
);
531 /* Ignore adding duplicate addresses on an interface */
532 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
533 ADBG(("ipv6_add_addr: already assigned\n"));
538 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
541 ADBG(("ipv6_add_addr: malloc failed\n"));
546 rt
= addrconf_dst_alloc(idev
, addr
, 0);
552 ipv6_addr_copy(&ifa
->addr
, addr
);
554 spin_lock_init(&ifa
->lock
);
555 init_timer(&ifa
->timer
);
556 ifa
->timer
.data
= (unsigned long) ifa
;
558 ifa
->prefix_len
= pfxlen
;
559 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
560 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
565 * part one of RFC 4429, section 3.3
566 * We should not configure an address as
567 * optimistic if we do not yet know the link
568 * layer address of our nexhop router
571 if (rt
->rt6i_nexthop
== NULL
)
572 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
579 /* Add to big hash table */
580 hash
= ipv6_addr_hash(addr
);
582 ifa
->lst_next
= inet6_addr_lst
[hash
];
583 inet6_addr_lst
[hash
] = ifa
;
585 write_unlock(&addrconf_hash_lock
);
587 write_lock(&idev
->lock
);
588 /* Add to inet6_dev unicast addr list. */
589 ipv6_link_dev_addr(idev
, ifa
);
591 #ifdef CONFIG_IPV6_PRIVACY
592 if (ifa
->flags
&IFA_F_TEMPORARY
) {
593 ifa
->tmp_next
= idev
->tempaddr_list
;
594 idev
->tempaddr_list
= ifa
;
600 write_unlock(&idev
->lock
);
602 rcu_read_unlock_bh();
604 if (likely(err
== 0))
605 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
613 write_unlock(&addrconf_hash_lock
);
617 /* This function wants to get referenced ifp and releases it before return */
619 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
621 struct inet6_ifaddr
*ifa
, **ifap
;
622 struct inet6_dev
*idev
= ifp
->idev
;
624 int deleted
= 0, onlink
= 0;
625 unsigned long expires
= jiffies
;
627 hash
= ipv6_addr_hash(&ifp
->addr
);
631 write_lock_bh(&addrconf_hash_lock
);
632 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
633 ifap
= &ifa
->lst_next
) {
635 *ifap
= ifa
->lst_next
;
637 ifa
->lst_next
= NULL
;
641 write_unlock_bh(&addrconf_hash_lock
);
643 write_lock_bh(&idev
->lock
);
644 #ifdef CONFIG_IPV6_PRIVACY
645 if (ifp
->flags
&IFA_F_TEMPORARY
) {
646 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
647 ifap
= &ifa
->tmp_next
) {
649 *ifap
= ifa
->tmp_next
;
651 in6_ifa_put(ifp
->ifpub
);
655 ifa
->tmp_next
= NULL
;
662 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
664 *ifap
= ifa
->if_next
;
667 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
671 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
672 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
674 if (ifa
->flags
& IFA_F_PERMANENT
) {
679 unsigned long lifetime
;
684 spin_lock(&ifa
->lock
);
685 lifetime
= min_t(unsigned long,
686 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
687 if (time_before(expires
,
688 ifa
->tstamp
+ lifetime
* HZ
))
689 expires
= ifa
->tstamp
+ lifetime
* HZ
;
690 spin_unlock(&ifa
->lock
);
694 ifap
= &ifa
->if_next
;
696 write_unlock_bh(&idev
->lock
);
698 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
700 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
702 addrconf_del_timer(ifp
);
705 * Purge or update corresponding prefix
707 * 1) we don't purge prefix here if address was not permanent.
708 * prefix is managed by its own lifetime.
709 * 2) if there're no addresses, delete prefix.
710 * 3) if there're still other permanent address(es),
711 * corresponding prefix is still permanent.
712 * 4) otherwise, update prefix lifetime to the
713 * longest valid lifetime among the corresponding
714 * addresses on the device.
715 * Note: subsequent RA will update lifetime.
719 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
720 struct in6_addr prefix
;
723 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
724 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
726 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
730 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
731 rt
->rt6i_expires
= expires
;
732 rt
->rt6i_flags
|= RTF_EXPIRES
;
735 dst_release(&rt
->u
.dst
);
741 #ifdef CONFIG_IPV6_PRIVACY
742 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
744 struct inet6_dev
*idev
= ifp
->idev
;
745 struct in6_addr addr
, *tmpaddr
;
746 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
752 write_lock(&idev
->lock
);
754 spin_lock_bh(&ift
->lock
);
755 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
756 spin_unlock_bh(&ift
->lock
);
763 if (idev
->cnf
.use_tempaddr
<= 0) {
764 write_unlock(&idev
->lock
);
766 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
771 spin_lock_bh(&ifp
->lock
);
772 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
773 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
774 spin_unlock_bh(&ifp
->lock
);
775 write_unlock(&idev
->lock
);
777 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
783 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
784 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
785 spin_unlock_bh(&ifp
->lock
);
786 write_unlock(&idev
->lock
);
788 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
794 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
795 tmp_valid_lft
= min_t(__u32
,
797 idev
->cnf
.temp_valid_lft
);
798 tmp_prefered_lft
= min_t(__u32
,
800 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
801 tmp_plen
= ifp
->prefix_len
;
802 max_addresses
= idev
->cnf
.max_addresses
;
803 tmp_cstamp
= ifp
->cstamp
;
804 tmp_tstamp
= ifp
->tstamp
;
805 spin_unlock_bh(&ifp
->lock
);
807 write_unlock(&idev
->lock
);
809 addr_flags
= IFA_F_TEMPORARY
;
810 /* set in addrconf_prefix_rcv() */
811 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
812 addr_flags
|= IFA_F_OPTIMISTIC
;
814 ift
= !max_addresses
||
815 ipv6_count_addresses(idev
) < max_addresses
?
816 ipv6_add_addr(idev
, &addr
, tmp_plen
,
817 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
819 if (!ift
|| IS_ERR(ift
)) {
823 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
825 write_lock(&idev
->lock
);
829 spin_lock_bh(&ift
->lock
);
831 ift
->valid_lft
= tmp_valid_lft
;
832 ift
->prefered_lft
= tmp_prefered_lft
;
833 ift
->cstamp
= tmp_cstamp
;
834 ift
->tstamp
= tmp_tstamp
;
835 spin_unlock_bh(&ift
->lock
);
837 addrconf_dad_start(ift
, 0);
846 * Choose an appropriate source address (RFC3484)
848 struct ipv6_saddr_score
{
856 #define IPV6_SADDR_SCORE_LOCAL 0x0001
857 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
858 #define IPV6_SADDR_SCORE_HOA 0x0008
859 #define IPV6_SADDR_SCORE_OIF 0x0010
860 #define IPV6_SADDR_SCORE_LABEL 0x0020
861 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
863 static inline int ipv6_saddr_preferred(int type
)
865 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
866 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
871 /* static matching label */
872 static inline int ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
875 * prefix (longest match) label
876 * -----------------------------
885 if (type
& IPV6_ADDR_LOOPBACK
)
887 else if (type
& IPV6_ADDR_COMPATv4
)
889 else if (type
& IPV6_ADDR_MAPPED
)
891 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
893 else if (addr
->s6_addr16
[0] == htons(0x2002))
895 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
900 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
901 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
903 struct ipv6_saddr_score hiscore
;
904 struct inet6_ifaddr
*ifa_result
= NULL
;
905 int daddr_type
= __ipv6_addr_type(daddr
);
906 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
907 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
908 struct net_device
*dev
;
910 memset(&hiscore
, 0, sizeof(hiscore
));
912 read_lock(&dev_base_lock
);
915 for_each_netdev(&init_net
, dev
) {
916 struct inet6_dev
*idev
;
917 struct inet6_ifaddr
*ifa
;
919 /* Rule 0: Candidate Source Address (section 4)
920 * - multicast and link-local destination address,
921 * the set of candidate source address MUST only
922 * include addresses assigned to interfaces
923 * belonging to the same link as the outgoing
925 * (- For site-local destination addresses, the
926 * set of candidate source addresses MUST only
927 * include addresses assigned to interfaces
928 * belonging to the same site as the outgoing
931 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
932 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
933 daddr_dev
&& dev
!= daddr_dev
)
936 idev
= __in6_dev_get(dev
);
940 read_lock_bh(&idev
->lock
);
941 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
942 struct ipv6_saddr_score score
;
944 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
947 * - Tentative Address (RFC2462 section 5.4)
948 * - A tentative address is not considered
949 * "assigned to an interface" in the traditional
950 * sense, unless it is also flagged as optimistic.
951 * - Candidate Source Address (section 4)
952 * - In any case, anycast addresses, multicast
953 * addresses, and the unspecified address MUST
954 * NOT be included in a candidate set.
956 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
957 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
959 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
960 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
961 LIMIT_NETDEBUG(KERN_DEBUG
962 "ADDRCONF: unspecified / multicast address"
963 "assigned as unicast address on %s",
973 if (ifa_result
== NULL
) {
974 /* record it if the first available entry */
978 /* Rule 1: Prefer same address */
979 if (hiscore
.rule
< 1) {
980 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
981 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
984 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
985 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
986 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
991 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
995 /* Rule 2: Prefer appropriate scope */
996 if (hiscore
.rule
< 2) {
997 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
1000 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
1001 if (hiscore
.scope
< score
.scope
) {
1002 if (hiscore
.scope
< daddr_scope
) {
1007 } else if (score
.scope
< hiscore
.scope
) {
1008 if (score
.scope
< daddr_scope
)
1009 break; /* addresses sorted by scope */
1016 /* Rule 3: Avoid deprecated and optimistic addresses */
1017 if (hiscore
.rule
< 3) {
1018 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1019 (((ifa_result
->flags
&
1020 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1021 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1024 if (ipv6_saddr_preferred(score
.addr_type
) ||
1026 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1027 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1028 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1033 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1037 /* Rule 4: Prefer home address */
1038 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1039 if (hiscore
.rule
< 4) {
1040 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1041 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1044 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1045 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1046 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1051 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1055 if (hiscore
.rule
< 4)
1059 /* Rule 5: Prefer outgoing interface */
1060 if (hiscore
.rule
< 5) {
1061 if (daddr_dev
== NULL
||
1062 daddr_dev
== ifa_result
->idev
->dev
)
1063 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1066 if (daddr_dev
== NULL
||
1067 daddr_dev
== ifa
->idev
->dev
) {
1068 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1069 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1074 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1078 /* Rule 6: Prefer matching label */
1079 if (hiscore
.rule
< 6) {
1080 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1081 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1084 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1085 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1086 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1091 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1095 #ifdef CONFIG_IPV6_PRIVACY
1096 /* Rule 7: Prefer public address
1097 * Note: prefer temprary address if use_tempaddr >= 2
1099 if (hiscore
.rule
< 7) {
1100 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1101 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1102 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1105 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1106 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1107 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1108 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1113 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1117 if (hiscore
.rule
< 7)
1120 /* Rule 8: Use longest matching prefix */
1121 if (hiscore
.rule
< 8) {
1122 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1125 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1126 if (score
.matchlen
> hiscore
.matchlen
) {
1131 else if (score
.matchlen
< hiscore
.matchlen
)
1135 /* Final Rule: choose first available one */
1139 in6_ifa_put(ifa_result
);
1144 read_unlock_bh(&idev
->lock
);
1147 read_unlock(&dev_base_lock
);
1150 return -EADDRNOTAVAIL
;
1152 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1153 in6_ifa_put(ifa_result
);
1158 int ipv6_get_saddr(struct dst_entry
*dst
,
1159 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1161 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1164 EXPORT_SYMBOL(ipv6_get_saddr
);
1166 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1167 unsigned char banned_flags
)
1169 struct inet6_dev
*idev
;
1170 int err
= -EADDRNOTAVAIL
;
1173 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1174 struct inet6_ifaddr
*ifp
;
1176 read_lock_bh(&idev
->lock
);
1177 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1178 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1179 ipv6_addr_copy(addr
, &ifp
->addr
);
1184 read_unlock_bh(&idev
->lock
);
1190 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1193 struct inet6_ifaddr
*ifp
;
1195 read_lock_bh(&idev
->lock
);
1196 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1198 read_unlock_bh(&idev
->lock
);
1202 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1204 struct inet6_ifaddr
* ifp
;
1205 u8 hash
= ipv6_addr_hash(addr
);
1207 read_lock_bh(&addrconf_hash_lock
);
1208 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1209 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1210 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1211 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1212 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1216 read_unlock_bh(&addrconf_hash_lock
);
1220 EXPORT_SYMBOL(ipv6_chk_addr
);
1223 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1225 struct inet6_ifaddr
* ifp
;
1226 u8 hash
= ipv6_addr_hash(addr
);
1228 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1229 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1230 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1237 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1239 struct inet6_ifaddr
* ifp
;
1240 u8 hash
= ipv6_addr_hash(addr
);
1242 read_lock_bh(&addrconf_hash_lock
);
1243 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1244 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1245 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1246 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1252 read_unlock_bh(&addrconf_hash_lock
);
1257 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1259 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1260 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1261 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1262 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1263 int sk_ipv6only
= ipv6_only_sock(sk
);
1264 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1265 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1266 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1268 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1271 if (addr_type2
== IPV6_ADDR_ANY
&&
1272 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1275 if (addr_type
== IPV6_ADDR_ANY
&&
1276 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1279 if (sk2_rcv_saddr6
&&
1280 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1283 if (addr_type
== IPV6_ADDR_MAPPED
&&
1285 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1291 /* Gets referenced address, destroys ifaddr */
1293 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1295 if (ifp
->flags
&IFA_F_PERMANENT
) {
1296 spin_lock_bh(&ifp
->lock
);
1297 addrconf_del_timer(ifp
);
1298 ifp
->flags
|= IFA_F_TENTATIVE
;
1299 spin_unlock_bh(&ifp
->lock
);
1301 #ifdef CONFIG_IPV6_PRIVACY
1302 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1303 struct inet6_ifaddr
*ifpub
;
1304 spin_lock_bh(&ifp
->lock
);
1307 in6_ifa_hold(ifpub
);
1308 spin_unlock_bh(&ifp
->lock
);
1309 ipv6_create_tempaddr(ifpub
, ifp
);
1312 spin_unlock_bh(&ifp
->lock
);
1320 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1322 if (net_ratelimit())
1323 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1324 addrconf_dad_stop(ifp
);
1327 /* Join to solicited addr multicast group. */
1329 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1331 struct in6_addr maddr
;
1333 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1336 addrconf_addr_solict_mult(addr
, &maddr
);
1337 ipv6_dev_mc_inc(dev
, &maddr
);
1340 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1342 struct in6_addr maddr
;
1344 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1347 addrconf_addr_solict_mult(addr
, &maddr
);
1348 __ipv6_dev_mc_dec(idev
, &maddr
);
1351 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1353 struct in6_addr addr
;
1354 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1355 if (ipv6_addr_any(&addr
))
1357 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1360 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1362 struct in6_addr addr
;
1363 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1364 if (ipv6_addr_any(&addr
))
1366 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1369 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1371 if (dev
->addr_len
!= ETH_ALEN
)
1373 memcpy(eui
, dev
->dev_addr
, 3);
1374 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1377 * The zSeries OSA network cards can be shared among various
1378 * OS instances, but the OSA cards have only one MAC address.
1379 * This leads to duplicate address conflicts in conjunction
1380 * with IPv6 if more than one instance uses the same card.
1382 * The driver for these cards can deliver a unique 16-bit
1383 * identifier for each instance sharing the same card. It is
1384 * placed instead of 0xFFFE in the interface identifier. The
1385 * "u" bit of the interface identifier is not inverted in this
1386 * case. Hence the resulting interface identifier has local
1387 * scope according to RFC2373.
1390 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1391 eui
[4] = dev
->dev_id
& 0xFF;
1400 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1402 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1403 if (dev
->addr_len
!= ARCNET_ALEN
)
1406 eui
[7] = *(u8
*)dev
->dev_addr
;
1410 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1412 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1414 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1419 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1421 switch (dev
->type
) {
1424 case ARPHRD_IEEE802_TR
:
1425 return addrconf_ifid_eui48(eui
, dev
);
1427 return addrconf_ifid_arcnet(eui
, dev
);
1428 case ARPHRD_INFINIBAND
:
1429 return addrconf_ifid_infiniband(eui
, dev
);
1434 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1437 struct inet6_ifaddr
*ifp
;
1439 read_lock_bh(&idev
->lock
);
1440 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1441 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1442 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1447 read_unlock_bh(&idev
->lock
);
1451 #ifdef CONFIG_IPV6_PRIVACY
1452 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1453 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1456 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1457 idev
->rndid
[0] &= ~0x02;
1460 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1461 * check if generated address is not inappropriate
1463 * - Reserved subnet anycast (RFC 2526)
1464 * 11111101 11....11 1xxxxxxx
1465 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1466 * 00-00-5E-FE-xx-xx-xx-xx
1468 * - XXX: already assigned to an address on the device
1470 if (idev
->rndid
[0] == 0xfd &&
1471 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1472 (idev
->rndid
[7]&0x80))
1474 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1475 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1477 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1484 static void ipv6_regen_rndid(unsigned long data
)
1486 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1487 unsigned long expires
;
1490 write_lock_bh(&idev
->lock
);
1495 if (__ipv6_regen_rndid(idev
) < 0)
1499 idev
->cnf
.temp_prefered_lft
* HZ
-
1500 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1501 if (time_before(expires
, jiffies
)) {
1503 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1508 if (!mod_timer(&idev
->regen_timer
, expires
))
1512 write_unlock_bh(&idev
->lock
);
1513 rcu_read_unlock_bh();
1517 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1520 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1521 ret
= __ipv6_regen_rndid(idev
);
1531 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1532 unsigned long expires
, u32 flags
)
1534 struct fib6_config cfg
= {
1535 .fc_table
= RT6_TABLE_PREFIX
,
1536 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1537 .fc_ifindex
= dev
->ifindex
,
1538 .fc_expires
= expires
,
1540 .fc_flags
= RTF_UP
| flags
,
1543 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1545 /* Prevent useless cloning on PtP SIT.
1546 This thing is done here expecting that the whole
1547 class of non-broadcast devices need not cloning.
1549 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1550 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1551 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1554 ip6_route_add(&cfg
);
1557 /* Create "default" multicast route to the interface */
1559 static void addrconf_add_mroute(struct net_device
*dev
)
1561 struct fib6_config cfg
= {
1562 .fc_table
= RT6_TABLE_LOCAL
,
1563 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1564 .fc_ifindex
= dev
->ifindex
,
1569 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1571 ip6_route_add(&cfg
);
1574 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1575 static void sit_route_add(struct net_device
*dev
)
1577 struct fib6_config cfg
= {
1578 .fc_table
= RT6_TABLE_MAIN
,
1579 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1580 .fc_ifindex
= dev
->ifindex
,
1582 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1585 /* prefix length - 96 bits "::d.d.d.d" */
1586 ip6_route_add(&cfg
);
1590 static void addrconf_add_lroute(struct net_device
*dev
)
1592 struct in6_addr addr
;
1594 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1595 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1598 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1600 struct inet6_dev
*idev
;
1604 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1607 /* Add default multicast route */
1608 addrconf_add_mroute(dev
);
1610 /* Add link local route */
1611 addrconf_add_lroute(dev
);
1615 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1617 struct prefix_info
*pinfo
;
1621 unsigned long rt_expires
;
1622 struct inet6_dev
*in6_dev
;
1624 pinfo
= (struct prefix_info
*) opt
;
1626 if (len
< sizeof(struct prefix_info
)) {
1627 ADBG(("addrconf: prefix option too short\n"));
1632 * Validation checks ([ADDRCONF], page 19)
1635 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1637 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1640 valid_lft
= ntohl(pinfo
->valid
);
1641 prefered_lft
= ntohl(pinfo
->prefered
);
1643 if (prefered_lft
> valid_lft
) {
1644 if (net_ratelimit())
1645 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1649 in6_dev
= in6_dev_get(dev
);
1651 if (in6_dev
== NULL
) {
1652 if (net_ratelimit())
1653 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1658 * Two things going on here:
1659 * 1) Add routes for on-link prefixes
1660 * 2) Configure prefixes with the auto flag set
1663 /* Avoid arithmetic overflow. Really, we could
1664 save rt_expires in seconds, likely valid_lft,
1665 but it would require division in fib gc, that it
1668 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1669 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1671 rt_expires
= valid_lft
* HZ
;
1674 * We convert this (in jiffies) to clock_t later.
1675 * Avoid arithmetic overflow there as well.
1676 * Overflow can happen only if HZ < USER_HZ.
1678 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1679 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1681 if (pinfo
->onlink
) {
1682 struct rt6_info
*rt
;
1683 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1685 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1686 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1687 if (valid_lft
== 0) {
1691 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1694 } else if (valid_lft
) {
1695 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1696 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1699 dst_release(&rt
->u
.dst
);
1702 /* Try to figure out our local address for this prefix */
1704 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1705 struct inet6_ifaddr
* ifp
;
1706 struct in6_addr addr
;
1707 int create
= 0, update_lft
= 0;
1709 if (pinfo
->prefix_len
== 64) {
1710 memcpy(&addr
, &pinfo
->prefix
, 8);
1711 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1712 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1713 in6_dev_put(in6_dev
);
1718 if (net_ratelimit())
1719 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1721 in6_dev_put(in6_dev
);
1726 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1728 if (ifp
== NULL
&& valid_lft
) {
1729 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1732 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1733 if (in6_dev
->cnf
.optimistic_dad
&&
1734 !ipv6_devconf
.forwarding
)
1735 addr_flags
= IFA_F_OPTIMISTIC
;
1738 /* Do not allow to create too much of autoconfigured
1739 * addresses; this would be too easy way to crash kernel.
1741 if (!max_addresses
||
1742 ipv6_count_addresses(in6_dev
) < max_addresses
)
1743 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1744 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1747 if (!ifp
|| IS_ERR(ifp
)) {
1748 in6_dev_put(in6_dev
);
1752 update_lft
= create
= 1;
1753 ifp
->cstamp
= jiffies
;
1754 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1760 #ifdef CONFIG_IPV6_PRIVACY
1761 struct inet6_ifaddr
*ift
;
1765 /* update lifetime (RFC2462 5.5.3 e) */
1766 spin_lock(&ifp
->lock
);
1768 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1769 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1772 if (!update_lft
&& stored_lft
) {
1773 if (valid_lft
> MIN_VALID_LIFETIME
||
1774 valid_lft
> stored_lft
)
1776 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1777 /* valid_lft <= stored_lft is always true */
1781 valid_lft
= MIN_VALID_LIFETIME
;
1782 if (valid_lft
< prefered_lft
)
1783 prefered_lft
= valid_lft
;
1789 ifp
->valid_lft
= valid_lft
;
1790 ifp
->prefered_lft
= prefered_lft
;
1793 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1794 spin_unlock(&ifp
->lock
);
1796 if (!(flags
&IFA_F_TENTATIVE
))
1797 ipv6_ifa_notify(0, ifp
);
1799 spin_unlock(&ifp
->lock
);
1801 #ifdef CONFIG_IPV6_PRIVACY
1802 read_lock_bh(&in6_dev
->lock
);
1803 /* update all temporary addresses in the list */
1804 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1806 * When adjusting the lifetimes of an existing
1807 * temporary address, only lower the lifetimes.
1808 * Implementations must not increase the
1809 * lifetimes of an existing temporary address
1810 * when processing a Prefix Information Option.
1812 spin_lock(&ift
->lock
);
1814 if (ift
->valid_lft
> valid_lft
&&
1815 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1816 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1817 if (ift
->prefered_lft
> prefered_lft
&&
1818 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1819 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1820 spin_unlock(&ift
->lock
);
1821 if (!(flags
&IFA_F_TENTATIVE
))
1822 ipv6_ifa_notify(0, ift
);
1825 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1827 * When a new public address is created as described in [ADDRCONF],
1828 * also create a new temporary address.
1830 read_unlock_bh(&in6_dev
->lock
);
1831 ipv6_create_tempaddr(ifp
, NULL
);
1833 read_unlock_bh(&in6_dev
->lock
);
1840 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1841 in6_dev_put(in6_dev
);
1845 * Set destination address.
1846 * Special case for SIT interfaces where we create a new "virtual"
1849 int addrconf_set_dstaddr(void __user
*arg
)
1851 struct in6_ifreq ireq
;
1852 struct net_device
*dev
;
1858 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1861 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1867 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1868 if (dev
->type
== ARPHRD_SIT
) {
1871 struct ip_tunnel_parm p
;
1873 err
= -EADDRNOTAVAIL
;
1874 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1877 memset(&p
, 0, sizeof(p
));
1878 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1882 p
.iph
.protocol
= IPPROTO_IPV6
;
1884 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1886 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1887 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1892 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1894 err
= dev_open(dev
);
1905 * Manual configuration of address on an interface
1907 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1908 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1910 struct inet6_ifaddr
*ifp
;
1911 struct inet6_dev
*idev
;
1912 struct net_device
*dev
;
1914 u32 flags
= RTF_EXPIRES
;
1918 /* check the lifetime */
1919 if (!valid_lft
|| prefered_lft
> valid_lft
)
1922 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1925 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1928 scope
= ipv6_addr_scope(pfx
);
1930 if (valid_lft
== INFINITY_LIFE_TIME
) {
1931 ifa_flags
|= IFA_F_PERMANENT
;
1933 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1934 valid_lft
= 0x7FFFFFFF/HZ
;
1936 if (prefered_lft
== 0)
1937 ifa_flags
|= IFA_F_DEPRECATED
;
1938 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1939 (prefered_lft
!= INFINITY_LIFE_TIME
))
1940 prefered_lft
= 0x7FFFFFFF/HZ
;
1942 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1945 spin_lock_bh(&ifp
->lock
);
1946 ifp
->valid_lft
= valid_lft
;
1947 ifp
->prefered_lft
= prefered_lft
;
1948 ifp
->tstamp
= jiffies
;
1949 spin_unlock_bh(&ifp
->lock
);
1951 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1952 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1954 * Note that section 3.1 of RFC 4429 indicates
1955 * that the Optimistic flag should not be set for
1956 * manually configured addresses
1958 addrconf_dad_start(ifp
, 0);
1964 return PTR_ERR(ifp
);
1967 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1969 struct inet6_ifaddr
*ifp
;
1970 struct inet6_dev
*idev
;
1971 struct net_device
*dev
;
1973 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1976 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1979 read_lock_bh(&idev
->lock
);
1980 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1981 if (ifp
->prefix_len
== plen
&&
1982 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1984 read_unlock_bh(&idev
->lock
);
1988 /* If the last address is deleted administratively,
1989 disable IPv6 on this interface.
1991 if (idev
->addr_list
== NULL
)
1992 addrconf_ifdown(idev
->dev
, 1);
1996 read_unlock_bh(&idev
->lock
);
1997 return -EADDRNOTAVAIL
;
2001 int addrconf_add_ifaddr(void __user
*arg
)
2003 struct in6_ifreq ireq
;
2006 if (!capable(CAP_NET_ADMIN
))
2009 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2013 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
2014 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2019 int addrconf_del_ifaddr(void __user
*arg
)
2021 struct in6_ifreq ireq
;
2024 if (!capable(CAP_NET_ADMIN
))
2027 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2031 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2036 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2037 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2039 struct inet6_ifaddr
* ifp
;
2040 struct in6_addr addr
;
2041 struct net_device
*dev
;
2046 memset(&addr
, 0, sizeof(struct in6_addr
));
2047 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2049 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2050 addr
.s6_addr32
[0] = htonl(0xfe800000);
2053 scope
= IPV6_ADDR_COMPATv4
;
2056 if (addr
.s6_addr32
[3]) {
2057 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2059 spin_lock_bh(&ifp
->lock
);
2060 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2061 spin_unlock_bh(&ifp
->lock
);
2062 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2068 for_each_netdev(&init_net
, dev
) {
2069 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2070 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2071 struct in_ifaddr
* ifa
;
2075 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2078 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2080 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2082 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2083 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2087 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2092 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2095 spin_lock_bh(&ifp
->lock
);
2096 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2097 spin_unlock_bh(&ifp
->lock
);
2098 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2107 static void init_loopback(struct net_device
*dev
)
2109 struct inet6_dev
*idev
;
2110 struct inet6_ifaddr
* ifp
;
2116 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2117 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2121 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2123 spin_lock_bh(&ifp
->lock
);
2124 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2125 spin_unlock_bh(&ifp
->lock
);
2126 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2131 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2133 struct inet6_ifaddr
* ifp
;
2134 u32 addr_flags
= IFA_F_PERMANENT
;
2136 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2137 if (idev
->cnf
.optimistic_dad
&&
2138 !ipv6_devconf
.forwarding
)
2139 addr_flags
|= IFA_F_OPTIMISTIC
;
2143 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2145 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2146 addrconf_dad_start(ifp
, 0);
2151 static void addrconf_dev_config(struct net_device
*dev
)
2153 struct in6_addr addr
;
2154 struct inet6_dev
* idev
;
2158 if ((dev
->type
!= ARPHRD_ETHER
) &&
2159 (dev
->type
!= ARPHRD_FDDI
) &&
2160 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2161 (dev
->type
!= ARPHRD_ARCNET
) &&
2162 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2163 /* Alas, we support only Ethernet autoconfiguration. */
2167 idev
= addrconf_add_dev(dev
);
2171 memset(&addr
, 0, sizeof(struct in6_addr
));
2172 addr
.s6_addr32
[0] = htonl(0xFE800000);
2174 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2175 addrconf_add_linklocal(idev
, &addr
);
2178 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2179 static void addrconf_sit_config(struct net_device
*dev
)
2181 struct inet6_dev
*idev
;
2186 * Configure the tunnel with one of our IPv4
2187 * addresses... we should configure all of
2188 * our v4 addrs in the tunnel
2191 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2192 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2196 sit_add_v4_addrs(idev
);
2198 if (dev
->flags
&IFF_POINTOPOINT
) {
2199 addrconf_add_mroute(dev
);
2200 addrconf_add_lroute(dev
);
2207 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2209 struct in6_addr lladdr
;
2211 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2212 addrconf_add_linklocal(idev
, &lladdr
);
2218 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2220 struct net_device
*link_dev
;
2222 /* first try to inherit the link-local address from the link device */
2223 if (idev
->dev
->iflink
&&
2224 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2225 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2228 /* then try to inherit it from any device */
2229 for_each_netdev(&init_net
, link_dev
) {
2230 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2233 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2237 * Autoconfigure tunnel with a link-local address so routing protocols,
2238 * DHCPv6, MLD etc. can be run over the virtual link
2241 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2243 struct inet6_dev
*idev
;
2247 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2248 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2251 ip6_tnl_add_linklocal(idev
);
2254 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2257 struct net_device
*dev
= (struct net_device
*) data
;
2258 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2259 int run_pending
= 0;
2262 if (dev
->nd_net
!= &init_net
)
2266 case NETDEV_REGISTER
:
2267 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2268 idev
= ipv6_add_dev(dev
);
2270 return notifier_from_errno(-ENOMEM
);
2275 if (dev
->flags
& IFF_SLAVE
)
2278 if (event
== NETDEV_UP
) {
2279 if (!netif_carrier_ok(dev
)) {
2280 /* device is not ready yet. */
2282 "ADDRCONF(NETDEV_UP): %s: "
2283 "link is not ready\n",
2289 idev
->if_flags
|= IF_READY
;
2291 if (!netif_carrier_ok(dev
)) {
2292 /* device is still not ready. */
2297 if (idev
->if_flags
& IF_READY
) {
2298 /* device is already configured. */
2301 idev
->if_flags
|= IF_READY
;
2305 "ADDRCONF(NETDEV_CHANGE): %s: "
2306 "link becomes ready\n",
2313 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2315 addrconf_sit_config(dev
);
2318 case ARPHRD_TUNNEL6
:
2319 addrconf_ip6_tnl_config(dev
);
2321 case ARPHRD_LOOPBACK
:
2326 addrconf_dev_config(dev
);
2331 addrconf_dad_run(idev
);
2333 /* If the MTU changed during the interface down, when the
2334 interface up, the changed MTU must be reflected in the
2335 idev as well as routers.
2337 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2338 rt6_mtu_change(dev
, dev
->mtu
);
2339 idev
->cnf
.mtu6
= dev
->mtu
;
2341 idev
->tstamp
= jiffies
;
2342 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2343 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2344 stop IPv6 on this interface.
2346 if (dev
->mtu
< IPV6_MIN_MTU
)
2347 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2351 case NETDEV_CHANGEMTU
:
2352 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2353 rt6_mtu_change(dev
, dev
->mtu
);
2354 idev
->cnf
.mtu6
= dev
->mtu
;
2358 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2361 case NETDEV_UNREGISTER
:
2363 * Remove all addresses from this interface.
2365 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2368 case NETDEV_CHANGENAME
:
2370 snmp6_unregister_dev(idev
);
2371 #ifdef CONFIG_SYSCTL
2372 addrconf_sysctl_unregister(&idev
->cnf
);
2373 neigh_sysctl_unregister(idev
->nd_parms
);
2374 neigh_sysctl_register(dev
, idev
->nd_parms
,
2375 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2376 &ndisc_ifinfo_sysctl_change
,
2378 addrconf_sysctl_register(idev
, &idev
->cnf
);
2380 err
= snmp6_register_dev(idev
);
2382 return notifier_from_errno(err
);
2391 * addrconf module should be notified of a device going up
2393 static struct notifier_block ipv6_dev_notf
= {
2394 .notifier_call
= addrconf_notify
,
2398 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2400 struct inet6_dev
*idev
;
2401 struct inet6_ifaddr
*ifa
, **bifa
;
2406 if (dev
== &loopback_dev
&& how
== 1)
2410 neigh_ifdown(&nd_tbl
, dev
);
2412 idev
= __in6_dev_get(dev
);
2416 /* Step 1: remove reference to ipv6 device from parent device.
2422 /* protected by rtnl_lock */
2423 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2425 /* Step 1.5: remove snmp6 entry */
2426 snmp6_unregister_dev(idev
);
2430 /* Step 2: clear hash table */
2431 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2432 bifa
= &inet6_addr_lst
[i
];
2434 write_lock_bh(&addrconf_hash_lock
);
2435 while ((ifa
= *bifa
) != NULL
) {
2436 if (ifa
->idev
== idev
) {
2437 *bifa
= ifa
->lst_next
;
2438 ifa
->lst_next
= NULL
;
2439 addrconf_del_timer(ifa
);
2443 bifa
= &ifa
->lst_next
;
2445 write_unlock_bh(&addrconf_hash_lock
);
2448 write_lock_bh(&idev
->lock
);
2450 /* Step 3: clear flags for stateless addrconf */
2452 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2454 /* Step 4: clear address list */
2455 #ifdef CONFIG_IPV6_PRIVACY
2456 if (how
== 1 && del_timer(&idev
->regen_timer
))
2459 /* clear tempaddr list */
2460 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2461 idev
->tempaddr_list
= ifa
->tmp_next
;
2462 ifa
->tmp_next
= NULL
;
2464 write_unlock_bh(&idev
->lock
);
2465 spin_lock_bh(&ifa
->lock
);
2468 in6_ifa_put(ifa
->ifpub
);
2471 spin_unlock_bh(&ifa
->lock
);
2473 write_lock_bh(&idev
->lock
);
2476 while ((ifa
= idev
->addr_list
) != NULL
) {
2477 idev
->addr_list
= ifa
->if_next
;
2478 ifa
->if_next
= NULL
;
2480 addrconf_del_timer(ifa
);
2481 write_unlock_bh(&idev
->lock
);
2483 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2484 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2487 write_lock_bh(&idev
->lock
);
2489 write_unlock_bh(&idev
->lock
);
2491 /* Step 5: Discard multicast list */
2494 ipv6_mc_destroy_dev(idev
);
2498 /* Step 5: netlink notification of this interface */
2499 idev
->tstamp
= jiffies
;
2500 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2502 /* Shot the device (if unregistered) */
2505 #ifdef CONFIG_SYSCTL
2506 addrconf_sysctl_unregister(&idev
->cnf
);
2507 neigh_sysctl_unregister(idev
->nd_parms
);
2509 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2510 neigh_ifdown(&nd_tbl
, dev
);
2516 static void addrconf_rs_timer(unsigned long data
)
2518 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2520 if (ifp
->idev
->cnf
.forwarding
)
2523 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2525 * Announcement received after solicitation
2531 spin_lock(&ifp
->lock
);
2532 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2533 struct in6_addr all_routers
;
2535 /* The wait after the last probe can be shorter */
2536 addrconf_mod_timer(ifp
, AC_RS
,
2537 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2538 ifp
->idev
->cnf
.rtr_solicit_delay
:
2539 ifp
->idev
->cnf
.rtr_solicit_interval
);
2540 spin_unlock(&ifp
->lock
);
2542 ipv6_addr_all_routers(&all_routers
);
2544 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2546 spin_unlock(&ifp
->lock
);
2548 * Note: we do not support deprecated "all on-link"
2549 * assumption any longer.
2551 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2552 ifp
->idev
->dev
->name
);
2560 * Duplicate Address Detection
2562 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2564 unsigned long rand_num
;
2565 struct inet6_dev
*idev
= ifp
->idev
;
2567 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2570 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2572 ifp
->probes
= idev
->cnf
.dad_transmits
;
2573 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2576 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2578 struct inet6_dev
*idev
= ifp
->idev
;
2579 struct net_device
*dev
= idev
->dev
;
2581 addrconf_join_solict(dev
, &ifp
->addr
);
2583 net_srandom(ifp
->addr
.s6_addr32
[3]);
2585 read_lock_bh(&idev
->lock
);
2588 spin_lock_bh(&ifp
->lock
);
2590 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2591 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2592 ifp
->flags
& IFA_F_NODAD
) {
2593 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2594 spin_unlock_bh(&ifp
->lock
);
2595 read_unlock_bh(&idev
->lock
);
2597 addrconf_dad_completed(ifp
);
2601 if (!(idev
->if_flags
& IF_READY
)) {
2602 spin_unlock_bh(&ifp
->lock
);
2603 read_unlock_bh(&idev
->lock
);
2605 * If the defice is not ready:
2606 * - keep it tentative if it is a permanent address.
2607 * - otherwise, kill it.
2610 addrconf_dad_stop(ifp
);
2615 * Optimistic nodes can start receiving
2618 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2619 ip6_ins_rt(ifp
->rt
);
2621 addrconf_dad_kick(ifp
);
2622 spin_unlock_bh(&ifp
->lock
);
2624 read_unlock_bh(&idev
->lock
);
2627 static void addrconf_dad_timer(unsigned long data
)
2629 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2630 struct inet6_dev
*idev
= ifp
->idev
;
2631 struct in6_addr unspec
;
2632 struct in6_addr mcaddr
;
2634 read_lock_bh(&idev
->lock
);
2636 read_unlock_bh(&idev
->lock
);
2639 spin_lock_bh(&ifp
->lock
);
2640 if (ifp
->probes
== 0) {
2642 * DAD was successful
2645 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2646 spin_unlock_bh(&ifp
->lock
);
2647 read_unlock_bh(&idev
->lock
);
2649 addrconf_dad_completed(ifp
);
2655 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2656 spin_unlock_bh(&ifp
->lock
);
2657 read_unlock_bh(&idev
->lock
);
2659 /* send a neighbour solicitation for our addr */
2660 memset(&unspec
, 0, sizeof(unspec
));
2661 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2662 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2667 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2669 struct net_device
* dev
= ifp
->idev
->dev
;
2672 * Configure the address for reception. Now it is valid.
2675 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2677 /* If added prefix is link local and forwarding is off,
2678 start sending router solicitations.
2681 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2682 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2683 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2684 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2685 struct in6_addr all_routers
;
2687 ipv6_addr_all_routers(&all_routers
);
2690 * If a host as already performed a random delay
2691 * [...] as part of DAD [...] there is no need
2692 * to delay again before sending the first RS
2694 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2696 spin_lock_bh(&ifp
->lock
);
2698 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2699 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2700 spin_unlock_bh(&ifp
->lock
);
2704 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2705 struct inet6_ifaddr
*ifp
;
2707 read_lock_bh(&idev
->lock
);
2708 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2709 spin_lock_bh(&ifp
->lock
);
2710 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2711 spin_unlock_bh(&ifp
->lock
);
2714 spin_unlock_bh(&ifp
->lock
);
2715 addrconf_dad_kick(ifp
);
2717 read_unlock_bh(&idev
->lock
);
2720 #ifdef CONFIG_PROC_FS
2721 struct if6_iter_state
{
2725 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2727 struct inet6_ifaddr
*ifa
= NULL
;
2728 struct if6_iter_state
*state
= seq
->private;
2730 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2731 ifa
= inet6_addr_lst
[state
->bucket
];
2738 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2740 struct if6_iter_state
*state
= seq
->private;
2742 ifa
= ifa
->lst_next
;
2744 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2745 ifa
= inet6_addr_lst
[state
->bucket
];
2751 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2753 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2756 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2758 return pos
? NULL
: ifa
;
2761 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2763 read_lock_bh(&addrconf_hash_lock
);
2764 return if6_get_idx(seq
, *pos
);
2767 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2769 struct inet6_ifaddr
*ifa
;
2771 ifa
= if6_get_next(seq
, v
);
2776 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2778 read_unlock_bh(&addrconf_hash_lock
);
2781 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2783 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2785 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2787 ifp
->idev
->dev
->ifindex
,
2791 ifp
->idev
->dev
->name
);
2795 static const struct seq_operations if6_seq_ops
= {
2796 .start
= if6_seq_start
,
2797 .next
= if6_seq_next
,
2798 .show
= if6_seq_show
,
2799 .stop
= if6_seq_stop
,
2802 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2804 struct seq_file
*seq
;
2806 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2811 rc
= seq_open(file
, &if6_seq_ops
);
2815 seq
= file
->private_data
;
2824 static const struct file_operations if6_fops
= {
2825 .owner
= THIS_MODULE
,
2826 .open
= if6_seq_open
,
2828 .llseek
= seq_lseek
,
2829 .release
= seq_release_private
,
2832 int __init
if6_proc_init(void)
2834 if (!proc_net_fops_create(&init_net
, "if_inet6", S_IRUGO
, &if6_fops
))
2839 void if6_proc_exit(void)
2841 proc_net_remove(&init_net
, "if_inet6");
2843 #endif /* CONFIG_PROC_FS */
2845 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2846 /* Check if address is a home address configured on any interface. */
2847 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2850 struct inet6_ifaddr
* ifp
;
2851 u8 hash
= ipv6_addr_hash(addr
);
2852 read_lock_bh(&addrconf_hash_lock
);
2853 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2854 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2855 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2860 read_unlock_bh(&addrconf_hash_lock
);
2866 * Periodic address status verification
2869 static void addrconf_verify(unsigned long foo
)
2871 struct inet6_ifaddr
*ifp
;
2872 unsigned long now
, next
;
2875 spin_lock_bh(&addrconf_verify_lock
);
2877 next
= now
+ ADDR_CHECK_FREQUENCY
;
2879 del_timer(&addr_chk_timer
);
2881 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2884 read_lock(&addrconf_hash_lock
);
2885 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2887 #ifdef CONFIG_IPV6_PRIVACY
2888 unsigned long regen_advance
;
2891 if (ifp
->flags
& IFA_F_PERMANENT
)
2894 spin_lock(&ifp
->lock
);
2895 age
= (now
- ifp
->tstamp
) / HZ
;
2897 #ifdef CONFIG_IPV6_PRIVACY
2898 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2899 ifp
->idev
->cnf
.dad_transmits
*
2900 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2903 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2904 age
>= ifp
->valid_lft
) {
2905 spin_unlock(&ifp
->lock
);
2907 read_unlock(&addrconf_hash_lock
);
2910 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2911 spin_unlock(&ifp
->lock
);
2913 } else if (age
>= ifp
->prefered_lft
) {
2914 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2917 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2919 ifp
->flags
|= IFA_F_DEPRECATED
;
2922 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2923 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2925 spin_unlock(&ifp
->lock
);
2929 read_unlock(&addrconf_hash_lock
);
2931 ipv6_ifa_notify(0, ifp
);
2935 #ifdef CONFIG_IPV6_PRIVACY
2936 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2937 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2938 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2939 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2940 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2941 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2942 if (!ifp
->regen_count
&& ifpub
) {
2945 in6_ifa_hold(ifpub
);
2946 spin_unlock(&ifp
->lock
);
2947 read_unlock(&addrconf_hash_lock
);
2948 spin_lock(&ifpub
->lock
);
2949 ifpub
->regen_count
= 0;
2950 spin_unlock(&ifpub
->lock
);
2951 ipv6_create_tempaddr(ifpub
, ifp
);
2956 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2957 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2958 spin_unlock(&ifp
->lock
);
2961 /* ifp->prefered_lft <= ifp->valid_lft */
2962 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2963 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2964 spin_unlock(&ifp
->lock
);
2967 read_unlock(&addrconf_hash_lock
);
2970 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2971 add_timer(&addr_chk_timer
);
2972 spin_unlock_bh(&addrconf_verify_lock
);
2975 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2977 struct in6_addr
*pfx
= NULL
;
2980 pfx
= nla_data(addr
);
2983 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2986 pfx
= nla_data(local
);
2992 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
2993 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2994 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2995 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2999 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3001 struct ifaddrmsg
*ifm
;
3002 struct nlattr
*tb
[IFA_MAX
+1];
3003 struct in6_addr
*pfx
;
3006 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3010 ifm
= nlmsg_data(nlh
);
3011 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3015 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3018 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3019 u32 prefered_lft
, u32 valid_lft
)
3021 u32 flags
= RTF_EXPIRES
;
3023 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3026 if (valid_lft
== INFINITY_LIFE_TIME
) {
3027 ifa_flags
|= IFA_F_PERMANENT
;
3029 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3030 valid_lft
= 0x7FFFFFFF/HZ
;
3032 if (prefered_lft
== 0)
3033 ifa_flags
|= IFA_F_DEPRECATED
;
3034 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3035 (prefered_lft
!= INFINITY_LIFE_TIME
))
3036 prefered_lft
= 0x7FFFFFFF/HZ
;
3038 spin_lock_bh(&ifp
->lock
);
3039 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3040 ifp
->tstamp
= jiffies
;
3041 ifp
->valid_lft
= valid_lft
;
3042 ifp
->prefered_lft
= prefered_lft
;
3044 spin_unlock_bh(&ifp
->lock
);
3045 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3046 ipv6_ifa_notify(0, ifp
);
3048 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3049 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3056 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3058 struct ifaddrmsg
*ifm
;
3059 struct nlattr
*tb
[IFA_MAX
+1];
3060 struct in6_addr
*pfx
;
3061 struct inet6_ifaddr
*ifa
;
3062 struct net_device
*dev
;
3063 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3067 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3071 ifm
= nlmsg_data(nlh
);
3072 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3076 if (tb
[IFA_CACHEINFO
]) {
3077 struct ifa_cacheinfo
*ci
;
3079 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3080 valid_lft
= ci
->ifa_valid
;
3081 preferred_lft
= ci
->ifa_prefered
;
3083 preferred_lft
= INFINITY_LIFE_TIME
;
3084 valid_lft
= INFINITY_LIFE_TIME
;
3087 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3091 /* We ignore other flags so far. */
3092 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3094 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3097 * It would be best to check for !NLM_F_CREATE here but
3098 * userspace alreay relies on not having to provide this.
3100 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3101 ifa_flags
, preferred_lft
, valid_lft
);
3104 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3105 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3108 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3115 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3116 u8 scope
, int ifindex
)
3118 struct ifaddrmsg
*ifm
;
3120 ifm
= nlmsg_data(nlh
);
3121 ifm
->ifa_family
= AF_INET6
;
3122 ifm
->ifa_prefixlen
= prefixlen
;
3123 ifm
->ifa_flags
= flags
;
3124 ifm
->ifa_scope
= scope
;
3125 ifm
->ifa_index
= ifindex
;
3128 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3129 unsigned long tstamp
, u32 preferred
, u32 valid
)
3131 struct ifa_cacheinfo ci
;
3133 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3134 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3135 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3136 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3137 ci
.ifa_prefered
= preferred
;
3138 ci
.ifa_valid
= valid
;
3140 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3143 static inline int rt_scope(int ifa_scope
)
3145 if (ifa_scope
& IFA_HOST
)
3146 return RT_SCOPE_HOST
;
3147 else if (ifa_scope
& IFA_LINK
)
3148 return RT_SCOPE_LINK
;
3149 else if (ifa_scope
& IFA_SITE
)
3150 return RT_SCOPE_SITE
;
3152 return RT_SCOPE_UNIVERSE
;
3155 static inline int inet6_ifaddr_msgsize(void)
3157 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3158 + nla_total_size(16) /* IFA_ADDRESS */
3159 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3162 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3163 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3165 struct nlmsghdr
*nlh
;
3166 u32 preferred
, valid
;
3168 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3172 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3173 ifa
->idev
->dev
->ifindex
);
3175 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3176 preferred
= ifa
->prefered_lft
;
3177 valid
= ifa
->valid_lft
;
3178 if (preferred
!= INFINITY_LIFE_TIME
) {
3179 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3181 if (valid
!= INFINITY_LIFE_TIME
)
3185 preferred
= INFINITY_LIFE_TIME
;
3186 valid
= INFINITY_LIFE_TIME
;
3189 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3190 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3191 nlmsg_cancel(skb
, nlh
);
3195 return nlmsg_end(skb
, nlh
);
3198 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3199 u32 pid
, u32 seq
, int event
, u16 flags
)
3201 struct nlmsghdr
*nlh
;
3202 u8 scope
= RT_SCOPE_UNIVERSE
;
3203 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3205 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3206 scope
= RT_SCOPE_SITE
;
3208 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3212 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3213 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3214 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3215 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3216 nlmsg_cancel(skb
, nlh
);
3220 return nlmsg_end(skb
, nlh
);
3223 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3224 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3226 struct nlmsghdr
*nlh
;
3227 u8 scope
= RT_SCOPE_UNIVERSE
;
3228 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3230 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3231 scope
= RT_SCOPE_SITE
;
3233 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3237 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3238 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3239 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3240 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3241 nlmsg_cancel(skb
, nlh
);
3245 return nlmsg_end(skb
, nlh
);
3255 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3256 enum addr_type_t type
)
3259 int s_idx
, s_ip_idx
;
3261 struct net_device
*dev
;
3262 struct inet6_dev
*idev
= NULL
;
3263 struct inet6_ifaddr
*ifa
;
3264 struct ifmcaddr6
*ifmca
;
3265 struct ifacaddr6
*ifaca
;
3267 s_idx
= cb
->args
[0];
3268 s_ip_idx
= ip_idx
= cb
->args
[1];
3271 for_each_netdev(&init_net
, dev
) {
3277 if ((idev
= in6_dev_get(dev
)) == NULL
)
3279 read_lock_bh(&idev
->lock
);
3282 /* unicast address incl. temp addr */
3283 for (ifa
= idev
->addr_list
; ifa
;
3284 ifa
= ifa
->if_next
, ip_idx
++) {
3285 if (ip_idx
< s_ip_idx
)
3287 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3288 NETLINK_CB(cb
->skb
).pid
,
3289 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3294 case MULTICAST_ADDR
:
3295 /* multicast address */
3296 for (ifmca
= idev
->mc_list
; ifmca
;
3297 ifmca
= ifmca
->next
, ip_idx
++) {
3298 if (ip_idx
< s_ip_idx
)
3300 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3301 NETLINK_CB(cb
->skb
).pid
,
3302 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3308 /* anycast address */
3309 for (ifaca
= idev
->ac_list
; ifaca
;
3310 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3311 if (ip_idx
< s_ip_idx
)
3313 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3314 NETLINK_CB(cb
->skb
).pid
,
3315 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3323 read_unlock_bh(&idev
->lock
);
3330 read_unlock_bh(&idev
->lock
);
3334 cb
->args
[1] = ip_idx
;
3338 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3340 enum addr_type_t type
= UNICAST_ADDR
;
3341 return inet6_dump_addr(skb
, cb
, type
);
3344 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3346 enum addr_type_t type
= MULTICAST_ADDR
;
3347 return inet6_dump_addr(skb
, cb
, type
);
3351 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3353 enum addr_type_t type
= ANYCAST_ADDR
;
3354 return inet6_dump_addr(skb
, cb
, type
);
3357 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3360 struct ifaddrmsg
*ifm
;
3361 struct nlattr
*tb
[IFA_MAX
+1];
3362 struct in6_addr
*addr
= NULL
;
3363 struct net_device
*dev
= NULL
;
3364 struct inet6_ifaddr
*ifa
;
3365 struct sk_buff
*skb
;
3368 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3372 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3378 ifm
= nlmsg_data(nlh
);
3380 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3382 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3383 err
= -EADDRNOTAVAIL
;
3387 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3392 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3393 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3395 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3396 WARN_ON(err
== -EMSGSIZE
);
3400 err
= rtnl_unicast(skb
, NETLINK_CB(in_skb
).pid
);
3407 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3409 struct sk_buff
*skb
;
3412 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3416 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3418 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3419 WARN_ON(err
== -EMSGSIZE
);
3423 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3426 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3429 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3430 __s32
*array
, int bytes
)
3432 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3434 memset(array
, 0, bytes
);
3435 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3436 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3437 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3438 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3439 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3440 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3441 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3442 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3443 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3444 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3445 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3446 #ifdef CONFIG_IPV6_PRIVACY
3447 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3448 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3449 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3450 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3451 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3453 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3454 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3455 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3456 #ifdef CONFIG_IPV6_ROUTER_PREF
3457 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3458 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3459 #ifdef CONFIG_IPV6_ROUTE_INFO
3460 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3463 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3464 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3465 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3466 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3470 static inline size_t inet6_if_nlmsg_size(void)
3472 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3473 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3474 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3475 + nla_total_size(4) /* IFLA_MTU */
3476 + nla_total_size(4) /* IFLA_LINK */
3477 + nla_total_size( /* IFLA_PROTINFO */
3478 nla_total_size(4) /* IFLA_INET6_FLAGS */
3479 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3480 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3481 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3482 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3486 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3490 int pad
= bytes
- sizeof(u64
) * items
;
3493 /* Use put_unaligned() because stats may not be aligned for u64. */
3494 put_unaligned(items
, &stats
[0]);
3495 for (i
= 1; i
< items
; i
++)
3496 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3498 memset(&stats
[items
], 0, pad
);
3501 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3505 case IFLA_INET6_STATS
:
3506 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3508 case IFLA_INET6_ICMP6STATS
:
3509 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3514 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3515 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3517 struct net_device
*dev
= idev
->dev
;
3519 struct ifinfomsg
*hdr
;
3520 struct nlmsghdr
*nlh
;
3522 struct ifla_cacheinfo ci
;
3524 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3528 hdr
= nlmsg_data(nlh
);
3529 hdr
->ifi_family
= AF_INET6
;
3531 hdr
->ifi_type
= dev
->type
;
3532 hdr
->ifi_index
= dev
->ifindex
;
3533 hdr
->ifi_flags
= dev_get_flags(dev
);
3534 hdr
->ifi_change
= 0;
3536 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3539 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3541 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3542 if (dev
->ifindex
!= dev
->iflink
)
3543 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3545 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3546 if (protoinfo
== NULL
)
3547 goto nla_put_failure
;
3549 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3551 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3552 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3553 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3554 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3555 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3556 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3558 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3560 goto nla_put_failure
;
3561 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3563 /* XXX - MC not implemented */
3565 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3567 goto nla_put_failure
;
3568 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3570 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3572 goto nla_put_failure
;
3573 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3575 nla_nest_end(skb
, protoinfo
);
3576 return nlmsg_end(skb
, nlh
);
3579 nlmsg_cancel(skb
, nlh
);
3583 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3586 int s_idx
= cb
->args
[0];
3587 struct net_device
*dev
;
3588 struct inet6_dev
*idev
;
3590 read_lock(&dev_base_lock
);
3592 for_each_netdev(&init_net
, dev
) {
3595 if ((idev
= in6_dev_get(dev
)) == NULL
)
3597 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3598 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3605 read_unlock(&dev_base_lock
);
3611 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3613 struct sk_buff
*skb
;
3616 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3620 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3622 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3623 WARN_ON(err
== -EMSGSIZE
);
3627 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3630 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3633 static inline size_t inet6_prefix_nlmsg_size(void)
3635 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3636 + nla_total_size(sizeof(struct in6_addr
))
3637 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3640 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3641 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3642 int event
, unsigned int flags
)
3644 struct prefixmsg
*pmsg
;
3645 struct nlmsghdr
*nlh
;
3646 struct prefix_cacheinfo ci
;
3648 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3652 pmsg
= nlmsg_data(nlh
);
3653 pmsg
->prefix_family
= AF_INET6
;
3654 pmsg
->prefix_pad1
= 0;
3655 pmsg
->prefix_pad2
= 0;
3656 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3657 pmsg
->prefix_len
= pinfo
->prefix_len
;
3658 pmsg
->prefix_type
= pinfo
->type
;
3659 pmsg
->prefix_pad3
= 0;
3660 pmsg
->prefix_flags
= 0;
3662 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3663 if (pinfo
->autoconf
)
3664 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3666 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3668 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3669 ci
.valid_time
= ntohl(pinfo
->valid
);
3670 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3672 return nlmsg_end(skb
, nlh
);
3675 nlmsg_cancel(skb
, nlh
);
3679 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3680 struct prefix_info
*pinfo
)
3682 struct sk_buff
*skb
;
3685 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3689 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3691 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3692 WARN_ON(err
== -EMSGSIZE
);
3696 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3699 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX
, err
);
3702 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3704 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3709 * If the address was optimistic
3710 * we inserted the route at the start of
3711 * our DAD process, so we don't need
3714 if (!(ifp
->rt
->rt6i_node
))
3715 ip6_ins_rt(ifp
->rt
);
3716 if (ifp
->idev
->cnf
.forwarding
)
3717 addrconf_join_anycast(ifp
);
3720 if (ifp
->idev
->cnf
.forwarding
)
3721 addrconf_leave_anycast(ifp
);
3722 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3723 dst_hold(&ifp
->rt
->u
.dst
);
3724 if (ip6_del_rt(ifp
->rt
))
3725 dst_free(&ifp
->rt
->u
.dst
);
3730 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3733 if (likely(ifp
->idev
->dead
== 0))
3734 __ipv6_ifa_notify(event
, ifp
);
3735 rcu_read_unlock_bh();
3738 #ifdef CONFIG_SYSCTL
3741 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3742 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3744 int *valp
= ctl
->data
;
3748 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3750 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3751 if (valp
!= &ipv6_devconf
.forwarding
) {
3752 if ((!*valp
) ^ (!val
)) {
3753 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3756 dev_forward_change(idev
);
3759 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3760 addrconf_forward_change();
3763 rt6_purge_dflt_routers();
3769 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3770 int __user
*name
, int nlen
,
3771 void __user
*oldval
,
3772 size_t __user
*oldlenp
,
3773 void __user
*newval
, size_t newlen
)
3775 int *valp
= table
->data
;
3778 if (!newval
|| !newlen
)
3780 if (newlen
!= sizeof(int))
3782 if (get_user(new, (int __user
*)newval
))
3786 if (oldval
&& oldlenp
) {
3788 if (get_user(len
, oldlenp
))
3791 if (len
> table
->maxlen
)
3792 len
= table
->maxlen
;
3793 if (copy_to_user(oldval
, valp
, len
))
3795 if (put_user(len
, oldlenp
))
3800 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3801 if (valp
!= &ipv6_devconf
.forwarding
) {
3802 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3804 if (unlikely(idev
== NULL
))
3806 changed
= (!*valp
) ^ (!new);
3809 dev_forward_change(idev
);
3812 addrconf_forward_change();
3816 rt6_purge_dflt_routers();
3823 static struct addrconf_sysctl_table
3825 struct ctl_table_header
*sysctl_header
;
3826 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3827 ctl_table addrconf_dev
[2];
3828 ctl_table addrconf_conf_dir
[2];
3829 ctl_table addrconf_proto_dir
[2];
3830 ctl_table addrconf_root_dir
[2];
3831 } addrconf_sysctl __read_mostly
= {
3832 .sysctl_header
= NULL
,
3835 .ctl_name
= NET_IPV6_FORWARDING
,
3836 .procname
= "forwarding",
3837 .data
= &ipv6_devconf
.forwarding
,
3838 .maxlen
= sizeof(int),
3840 .proc_handler
= &addrconf_sysctl_forward
,
3841 .strategy
= &addrconf_sysctl_forward_strategy
,
3844 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3845 .procname
= "hop_limit",
3846 .data
= &ipv6_devconf
.hop_limit
,
3847 .maxlen
= sizeof(int),
3849 .proc_handler
= proc_dointvec
,
3852 .ctl_name
= NET_IPV6_MTU
,
3854 .data
= &ipv6_devconf
.mtu6
,
3855 .maxlen
= sizeof(int),
3857 .proc_handler
= &proc_dointvec
,
3860 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3861 .procname
= "accept_ra",
3862 .data
= &ipv6_devconf
.accept_ra
,
3863 .maxlen
= sizeof(int),
3865 .proc_handler
= &proc_dointvec
,
3868 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3869 .procname
= "accept_redirects",
3870 .data
= &ipv6_devconf
.accept_redirects
,
3871 .maxlen
= sizeof(int),
3873 .proc_handler
= &proc_dointvec
,
3876 .ctl_name
= NET_IPV6_AUTOCONF
,
3877 .procname
= "autoconf",
3878 .data
= &ipv6_devconf
.autoconf
,
3879 .maxlen
= sizeof(int),
3881 .proc_handler
= &proc_dointvec
,
3884 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3885 .procname
= "dad_transmits",
3886 .data
= &ipv6_devconf
.dad_transmits
,
3887 .maxlen
= sizeof(int),
3889 .proc_handler
= &proc_dointvec
,
3892 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3893 .procname
= "router_solicitations",
3894 .data
= &ipv6_devconf
.rtr_solicits
,
3895 .maxlen
= sizeof(int),
3897 .proc_handler
= &proc_dointvec
,
3900 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3901 .procname
= "router_solicitation_interval",
3902 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3903 .maxlen
= sizeof(int),
3905 .proc_handler
= &proc_dointvec_jiffies
,
3906 .strategy
= &sysctl_jiffies
,
3909 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3910 .procname
= "router_solicitation_delay",
3911 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3912 .maxlen
= sizeof(int),
3914 .proc_handler
= &proc_dointvec_jiffies
,
3915 .strategy
= &sysctl_jiffies
,
3918 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3919 .procname
= "force_mld_version",
3920 .data
= &ipv6_devconf
.force_mld_version
,
3921 .maxlen
= sizeof(int),
3923 .proc_handler
= &proc_dointvec
,
3925 #ifdef CONFIG_IPV6_PRIVACY
3927 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3928 .procname
= "use_tempaddr",
3929 .data
= &ipv6_devconf
.use_tempaddr
,
3930 .maxlen
= sizeof(int),
3932 .proc_handler
= &proc_dointvec
,
3935 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3936 .procname
= "temp_valid_lft",
3937 .data
= &ipv6_devconf
.temp_valid_lft
,
3938 .maxlen
= sizeof(int),
3940 .proc_handler
= &proc_dointvec
,
3943 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3944 .procname
= "temp_prefered_lft",
3945 .data
= &ipv6_devconf
.temp_prefered_lft
,
3946 .maxlen
= sizeof(int),
3948 .proc_handler
= &proc_dointvec
,
3951 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3952 .procname
= "regen_max_retry",
3953 .data
= &ipv6_devconf
.regen_max_retry
,
3954 .maxlen
= sizeof(int),
3956 .proc_handler
= &proc_dointvec
,
3959 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3960 .procname
= "max_desync_factor",
3961 .data
= &ipv6_devconf
.max_desync_factor
,
3962 .maxlen
= sizeof(int),
3964 .proc_handler
= &proc_dointvec
,
3968 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3969 .procname
= "max_addresses",
3970 .data
= &ipv6_devconf
.max_addresses
,
3971 .maxlen
= sizeof(int),
3973 .proc_handler
= &proc_dointvec
,
3976 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3977 .procname
= "accept_ra_defrtr",
3978 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3979 .maxlen
= sizeof(int),
3981 .proc_handler
= &proc_dointvec
,
3984 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3985 .procname
= "accept_ra_pinfo",
3986 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3987 .maxlen
= sizeof(int),
3989 .proc_handler
= &proc_dointvec
,
3991 #ifdef CONFIG_IPV6_ROUTER_PREF
3993 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3994 .procname
= "accept_ra_rtr_pref",
3995 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3996 .maxlen
= sizeof(int),
3998 .proc_handler
= &proc_dointvec
,
4001 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4002 .procname
= "router_probe_interval",
4003 .data
= &ipv6_devconf
.rtr_probe_interval
,
4004 .maxlen
= sizeof(int),
4006 .proc_handler
= &proc_dointvec_jiffies
,
4007 .strategy
= &sysctl_jiffies
,
4009 #ifdef CONFIG_IPV6_ROUTE_INFO
4011 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4012 .procname
= "accept_ra_rt_info_max_plen",
4013 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4014 .maxlen
= sizeof(int),
4016 .proc_handler
= &proc_dointvec
,
4021 .ctl_name
= NET_IPV6_PROXY_NDP
,
4022 .procname
= "proxy_ndp",
4023 .data
= &ipv6_devconf
.proxy_ndp
,
4024 .maxlen
= sizeof(int),
4026 .proc_handler
= &proc_dointvec
,
4029 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4030 .procname
= "accept_source_route",
4031 .data
= &ipv6_devconf
.accept_source_route
,
4032 .maxlen
= sizeof(int),
4034 .proc_handler
= &proc_dointvec
,
4036 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4038 .ctl_name
= CTL_UNNUMBERED
,
4039 .procname
= "optimistic_dad",
4040 .data
= &ipv6_devconf
.optimistic_dad
,
4041 .maxlen
= sizeof(int),
4043 .proc_handler
= &proc_dointvec
,
4048 .ctl_name
= 0, /* sentinel */
4053 .ctl_name
= NET_PROTO_CONF_ALL
,
4056 .child
= addrconf_sysctl
.addrconf_vars
,
4059 .ctl_name
= 0, /* sentinel */
4062 .addrconf_conf_dir
= {
4064 .ctl_name
= NET_IPV6_CONF
,
4067 .child
= addrconf_sysctl
.addrconf_dev
,
4070 .ctl_name
= 0, /* sentinel */
4073 .addrconf_proto_dir
= {
4075 .ctl_name
= NET_IPV6
,
4078 .child
= addrconf_sysctl
.addrconf_conf_dir
,
4081 .ctl_name
= 0, /* sentinel */
4084 .addrconf_root_dir
= {
4086 .ctl_name
= CTL_NET
,
4089 .child
= addrconf_sysctl
.addrconf_proto_dir
,
4092 .ctl_name
= 0, /* sentinel */
4097 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4100 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
4101 struct addrconf_sysctl_table
*t
;
4102 char *dev_name
= NULL
;
4104 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4107 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4108 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4109 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4112 dev_name
= dev
->name
;
4113 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
4115 dev_name
= "default";
4116 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
4120 * Make a copy of dev_name, because '.procname' is regarded as const
4121 * by sysctl and we wouldn't want anyone to change it under our feet
4122 * (see SIOCSIFNAME).
4124 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4128 t
->addrconf_dev
[0].procname
= dev_name
;
4130 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
4131 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
4132 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
4133 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
4135 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
4136 if (t
->sysctl_header
== NULL
)
4151 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4154 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4156 unregister_sysctl_table(t
->sysctl_header
);
4157 kfree(t
->addrconf_dev
[0].procname
);
4169 int register_inet6addr_notifier(struct notifier_block
*nb
)
4171 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4174 EXPORT_SYMBOL(register_inet6addr_notifier
);
4176 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4178 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4181 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4184 * Init / cleanup code
4187 int __init
addrconf_init(void)
4191 /* The addrconf netdev notifier requires that loopback_dev
4192 * has it's ipv6 private information allocated and setup
4193 * before it can bring up and give link-local addresses
4194 * to other devices which are up.
4196 * Unfortunately, loopback_dev is not necessarily the first
4197 * entry in the global dev_base list of net devices. In fact,
4198 * it is likely to be the very last entry on that list.
4199 * So this causes the notifier registry below to try and
4200 * give link-local addresses to all devices besides loopback_dev
4201 * first, then loopback_dev, which cases all the non-loopback_dev
4202 * devices to fail to get a link-local address.
4204 * So, as a temporary fix, allocate the ipv6 structure for
4205 * loopback_dev first by hand.
4206 * Longer term, all of the dependencies ipv6 has upon the loopback
4207 * device and it being up should be removed.
4210 if (!ipv6_add_dev(&loopback_dev
))
4216 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4217 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4218 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4219 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4222 register_netdevice_notifier(&ipv6_dev_notf
);
4226 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4230 /* Only the first call to __rtnl_register can fail */
4231 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4232 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4233 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4234 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4235 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4237 #ifdef CONFIG_SYSCTL
4238 addrconf_sysctl
.sysctl_header
=
4239 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4240 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4245 unregister_netdevice_notifier(&ipv6_dev_notf
);
4250 void __exit
addrconf_cleanup(void)
4252 struct net_device
*dev
;
4253 struct inet6_ifaddr
*ifa
;
4256 unregister_netdevice_notifier(&ipv6_dev_notf
);
4258 #ifdef CONFIG_SYSCTL
4259 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4260 addrconf_sysctl_unregister(&ipv6_devconf
);
4269 for_each_netdev(&init_net
, dev
) {
4270 if (__in6_dev_get(dev
) == NULL
)
4272 addrconf_ifdown(dev
, 1);
4274 addrconf_ifdown(&loopback_dev
, 2);
4280 write_lock_bh(&addrconf_hash_lock
);
4281 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4282 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4283 struct inet6_ifaddr
*bifa
;
4286 ifa
= ifa
->lst_next
;
4287 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4288 /* Do not free it; something is wrong.
4289 Now we can investigate it with debugger.
4293 write_unlock_bh(&addrconf_hash_lock
);
4295 del_timer(&addr_chk_timer
);
4299 #ifdef CONFIG_PROC_FS
4300 proc_net_remove(&init_net
, "if_inet6");