2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <net/netlink.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
83 #include <asm/uaccess.h>
85 #include <linux/proc_fs.h>
86 #include <linux/seq_file.h>
88 /* Set to 3 to get tracing... */
92 #define ADBG(x) printk x
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
98 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
102 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
105 #ifdef CONFIG_IPV6_PRIVACY
106 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
107 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
108 static void ipv6_regen_rndid(unsigned long data
);
110 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
113 static int ipv6_count_addresses(struct inet6_dev
*idev
);
116 * Configured unicast address hash table
118 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
119 static DEFINE_RWLOCK(addrconf_hash_lock
);
121 static void addrconf_verify(unsigned long);
123 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
124 static DEFINE_SPINLOCK(addrconf_verify_lock
);
126 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
127 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
129 static int addrconf_ifdown(struct net_device
*dev
, int how
);
131 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
132 static void addrconf_dad_timer(unsigned long data
);
133 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
134 static void addrconf_dad_run(struct inet6_dev
*idev
);
135 static void addrconf_rs_timer(unsigned long data
);
136 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
137 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
140 struct prefix_info
*pinfo
);
141 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
143 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
145 struct ipv6_devconf ipv6_devconf __read_mostly
= {
147 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
148 .mtu6
= IPV6_MIN_MTU
,
150 .accept_redirects
= 1,
152 .force_mld_version
= 0,
154 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
155 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
156 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
157 #ifdef CONFIG_IPV6_PRIVACY
159 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
160 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
161 .regen_max_retry
= REGEN_MAX_RETRY
,
162 .max_desync_factor
= MAX_DESYNC_FACTOR
,
164 .max_addresses
= IPV6_MAX_ADDRESSES
,
165 .accept_ra_defrtr
= 1,
166 .accept_ra_pinfo
= 1,
167 #ifdef CONFIG_IPV6_ROUTER_PREF
168 .accept_ra_rtr_pref
= 1,
169 .rtr_probe_interval
= 60 * HZ
,
170 #ifdef CONFIG_IPV6_ROUTE_INFO
171 .accept_ra_rt_info_max_plen
= 0,
177 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
179 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
180 .mtu6
= IPV6_MIN_MTU
,
182 .accept_redirects
= 1,
185 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
186 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
187 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
188 #ifdef CONFIG_IPV6_PRIVACY
190 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
191 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
192 .regen_max_retry
= REGEN_MAX_RETRY
,
193 .max_desync_factor
= MAX_DESYNC_FACTOR
,
195 .max_addresses
= IPV6_MAX_ADDRESSES
,
196 .accept_ra_defrtr
= 1,
197 .accept_ra_pinfo
= 1,
198 #ifdef CONFIG_IPV6_ROUTER_PREF
199 .accept_ra_rtr_pref
= 1,
200 .rtr_probe_interval
= 60 * HZ
,
201 #ifdef CONFIG_IPV6_ROUTE_INFO
202 .accept_ra_rt_info_max_plen
= 0,
208 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
210 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
212 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
214 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
216 if (del_timer(&ifp
->timer
))
220 enum addrconf_timer_t
227 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
228 enum addrconf_timer_t what
,
231 if (!del_timer(&ifp
->timer
))
236 ifp
->timer
.function
= addrconf_dad_timer
;
239 ifp
->timer
.function
= addrconf_rs_timer
;
243 ifp
->timer
.expires
= jiffies
+ when
;
244 add_timer(&ifp
->timer
);
247 /* Nobody refers to this device, we may destroy it. */
249 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
251 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
255 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
257 struct net_device
*dev
= idev
->dev
;
258 BUG_TRAP(idev
->addr_list
==NULL
);
259 BUG_TRAP(idev
->mc_list
==NULL
);
260 #ifdef NET_REFCNT_DEBUG
261 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
265 printk("Freeing alive inet6 device %p\n", idev
);
268 snmp6_free_dev(idev
);
269 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
272 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
274 struct inet6_dev
*ndev
;
275 struct in6_addr maddr
;
279 if (dev
->mtu
< IPV6_MIN_MTU
)
282 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
287 rwlock_init(&ndev
->lock
);
289 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
290 ndev
->cnf
.mtu6
= dev
->mtu
;
291 ndev
->cnf
.sysctl
= NULL
;
292 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
293 if (ndev
->nd_parms
== NULL
) {
297 /* We refer to the device */
300 if (snmp6_alloc_dev(ndev
) < 0) {
302 "%s(): cannot allocate memory for statistics; dev=%s.\n",
303 __FUNCTION__
, dev
->name
));
304 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
306 in6_dev_finish_destroy(ndev
);
310 if (snmp6_register_dev(ndev
) < 0) {
312 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
313 __FUNCTION__
, dev
->name
));
314 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
316 in6_dev_finish_destroy(ndev
);
320 /* One reference from device. We must do this before
321 * we invoke __ipv6_regen_rndid().
325 #ifdef CONFIG_IPV6_PRIVACY
326 init_timer(&ndev
->regen_timer
);
327 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
328 ndev
->regen_timer
.data
= (unsigned long) ndev
;
329 if ((dev
->flags
&IFF_LOOPBACK
) ||
330 dev
->type
== ARPHRD_TUNNEL
||
331 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
332 dev
->type
== ARPHRD_SIT
||
334 dev
->type
== ARPHRD_NONE
) {
336 "%s: Disabled Privacy Extensions\n",
338 ndev
->cnf
.use_tempaddr
= -1;
341 ipv6_regen_rndid((unsigned long) ndev
);
345 if (netif_carrier_ok(dev
))
346 ndev
->if_flags
|= IF_READY
;
349 ipv6_mc_init_dev(ndev
);
350 ndev
->tstamp
= jiffies
;
352 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
353 NET_IPV6_NEIGH
, "ipv6",
354 &ndisc_ifinfo_sysctl_change
,
356 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
358 /* protected by rtnl_lock */
359 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
361 /* Join all-node multicast group */
362 ipv6_addr_all_nodes(&maddr
);
363 ipv6_dev_mc_inc(dev
, &maddr
);
368 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
370 struct inet6_dev
*idev
;
374 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
375 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
379 if (dev
->flags
&IFF_UP
)
385 static void dev_forward_change(struct inet6_dev
*idev
)
387 struct net_device
*dev
;
388 struct inet6_ifaddr
*ifa
;
389 struct in6_addr addr
;
394 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
395 ipv6_addr_all_routers(&addr
);
397 if (idev
->cnf
.forwarding
)
398 ipv6_dev_mc_inc(dev
, &addr
);
400 ipv6_dev_mc_dec(dev
, &addr
);
402 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
403 if (idev
->cnf
.forwarding
)
404 addrconf_join_anycast(ifa
);
406 addrconf_leave_anycast(ifa
);
411 static void addrconf_forward_change(void)
413 struct net_device
*dev
;
414 struct inet6_dev
*idev
;
416 read_lock(&dev_base_lock
);
417 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
419 idev
= __in6_dev_get(dev
);
421 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
422 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
424 dev_forward_change(idev
);
428 read_unlock(&dev_base_lock
);
432 /* Nobody refers to this ifaddr, destroy it */
434 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
436 BUG_TRAP(ifp
->if_next
==NULL
);
437 BUG_TRAP(ifp
->lst_next
==NULL
);
438 #ifdef NET_REFCNT_DEBUG
439 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
442 in6_dev_put(ifp
->idev
);
444 if (del_timer(&ifp
->timer
))
445 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
448 printk("Freeing alive inet6 address %p\n", ifp
);
451 dst_release(&ifp
->rt
->u
.dst
);
457 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
459 struct inet6_ifaddr
*ifa
, **ifap
;
460 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
463 * Each device address list is sorted in order of scope -
464 * global before linklocal.
466 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
467 ifap
= &ifa
->if_next
) {
468 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
472 ifp
->if_next
= *ifap
;
476 /* On success it returns ifp with increased reference count */
478 static struct inet6_ifaddr
*
479 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
480 int scope
, u32 flags
)
482 struct inet6_ifaddr
*ifa
= NULL
;
489 err
= -ENODEV
; /*XXX*/
493 write_lock(&addrconf_hash_lock
);
495 /* Ignore adding duplicate addresses on an interface */
496 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
497 ADBG(("ipv6_add_addr: already assigned\n"));
502 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
505 ADBG(("ipv6_add_addr: malloc failed\n"));
510 rt
= addrconf_dst_alloc(idev
, addr
, 0);
516 ipv6_addr_copy(&ifa
->addr
, addr
);
518 spin_lock_init(&ifa
->lock
);
519 init_timer(&ifa
->timer
);
520 ifa
->timer
.data
= (unsigned long) ifa
;
522 ifa
->prefix_len
= pfxlen
;
523 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
524 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
533 /* Add to big hash table */
534 hash
= ipv6_addr_hash(addr
);
536 ifa
->lst_next
= inet6_addr_lst
[hash
];
537 inet6_addr_lst
[hash
] = ifa
;
539 write_unlock(&addrconf_hash_lock
);
541 write_lock(&idev
->lock
);
542 /* Add to inet6_dev unicast addr list. */
543 ipv6_link_dev_addr(idev
, ifa
);
545 #ifdef CONFIG_IPV6_PRIVACY
546 if (ifa
->flags
&IFA_F_TEMPORARY
) {
547 ifa
->tmp_next
= idev
->tempaddr_list
;
548 idev
->tempaddr_list
= ifa
;
554 write_unlock(&idev
->lock
);
556 rcu_read_unlock_bh();
558 if (likely(err
== 0))
559 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
567 write_unlock(&addrconf_hash_lock
);
571 /* This function wants to get referenced ifp and releases it before return */
573 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
575 struct inet6_ifaddr
*ifa
, **ifap
;
576 struct inet6_dev
*idev
= ifp
->idev
;
578 int deleted
= 0, onlink
= 0;
579 unsigned long expires
= jiffies
;
581 hash
= ipv6_addr_hash(&ifp
->addr
);
585 write_lock_bh(&addrconf_hash_lock
);
586 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
587 ifap
= &ifa
->lst_next
) {
589 *ifap
= ifa
->lst_next
;
591 ifa
->lst_next
= NULL
;
595 write_unlock_bh(&addrconf_hash_lock
);
597 write_lock_bh(&idev
->lock
);
598 #ifdef CONFIG_IPV6_PRIVACY
599 if (ifp
->flags
&IFA_F_TEMPORARY
) {
600 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
601 ifap
= &ifa
->tmp_next
) {
603 *ifap
= ifa
->tmp_next
;
605 in6_ifa_put(ifp
->ifpub
);
609 ifa
->tmp_next
= NULL
;
616 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
618 *ifap
= ifa
->if_next
;
621 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
625 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
626 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
628 if (ifa
->flags
& IFA_F_PERMANENT
) {
633 unsigned long lifetime
;
638 spin_lock(&ifa
->lock
);
639 lifetime
= min_t(unsigned long,
640 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
641 if (time_before(expires
,
642 ifa
->tstamp
+ lifetime
* HZ
))
643 expires
= ifa
->tstamp
+ lifetime
* HZ
;
644 spin_unlock(&ifa
->lock
);
648 ifap
= &ifa
->if_next
;
650 write_unlock_bh(&idev
->lock
);
652 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
654 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
656 addrconf_del_timer(ifp
);
659 * Purge or update corresponding prefix
661 * 1) we don't purge prefix here if address was not permanent.
662 * prefix is managed by its own lifetime.
663 * 2) if there're no addresses, delete prefix.
664 * 3) if there're still other permanent address(es),
665 * corresponding prefix is still permanent.
666 * 4) otherwise, update prefix lifetime to the
667 * longest valid lifetime among the corresponding
668 * addresses on the device.
669 * Note: subsequent RA will update lifetime.
673 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
674 struct in6_addr prefix
;
677 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
678 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
680 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
684 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
685 rt
->rt6i_expires
= expires
;
686 rt
->rt6i_flags
|= RTF_EXPIRES
;
689 dst_release(&rt
->u
.dst
);
695 #ifdef CONFIG_IPV6_PRIVACY
696 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
698 struct inet6_dev
*idev
= ifp
->idev
;
699 struct in6_addr addr
, *tmpaddr
;
700 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
705 write_lock(&idev
->lock
);
707 spin_lock_bh(&ift
->lock
);
708 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
709 spin_unlock_bh(&ift
->lock
);
716 if (idev
->cnf
.use_tempaddr
<= 0) {
717 write_unlock(&idev
->lock
);
719 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
724 spin_lock_bh(&ifp
->lock
);
725 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
726 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
727 spin_unlock_bh(&ifp
->lock
);
728 write_unlock(&idev
->lock
);
730 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
736 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
737 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
738 spin_unlock_bh(&ifp
->lock
);
739 write_unlock(&idev
->lock
);
741 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
747 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
748 tmp_valid_lft
= min_t(__u32
,
750 idev
->cnf
.temp_valid_lft
);
751 tmp_prefered_lft
= min_t(__u32
,
753 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
754 tmp_plen
= ifp
->prefix_len
;
755 max_addresses
= idev
->cnf
.max_addresses
;
756 tmp_cstamp
= ifp
->cstamp
;
757 tmp_tstamp
= ifp
->tstamp
;
758 spin_unlock_bh(&ifp
->lock
);
760 write_unlock(&idev
->lock
);
761 ift
= !max_addresses
||
762 ipv6_count_addresses(idev
) < max_addresses
?
763 ipv6_add_addr(idev
, &addr
, tmp_plen
,
764 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
765 if (!ift
|| IS_ERR(ift
)) {
769 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
771 write_lock(&idev
->lock
);
775 spin_lock_bh(&ift
->lock
);
777 ift
->valid_lft
= tmp_valid_lft
;
778 ift
->prefered_lft
= tmp_prefered_lft
;
779 ift
->cstamp
= tmp_cstamp
;
780 ift
->tstamp
= tmp_tstamp
;
781 spin_unlock_bh(&ift
->lock
);
783 addrconf_dad_start(ift
, 0);
792 * Choose an appropriate source address (RFC3484)
794 struct ipv6_saddr_score
{
802 #define IPV6_SADDR_SCORE_LOCAL 0x0001
803 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
804 #define IPV6_SADDR_SCORE_HOA 0x0008
805 #define IPV6_SADDR_SCORE_OIF 0x0010
806 #define IPV6_SADDR_SCORE_LABEL 0x0020
807 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
809 static int inline ipv6_saddr_preferred(int type
)
811 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
812 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
817 /* static matching label */
818 static int inline ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
821 * prefix (longest match) label
822 * -----------------------------
831 if (type
& IPV6_ADDR_LOOPBACK
)
833 else if (type
& IPV6_ADDR_COMPATv4
)
835 else if (type
& IPV6_ADDR_MAPPED
)
837 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
839 else if (addr
->s6_addr16
[0] == htons(0x2002))
841 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
846 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
847 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
849 struct ipv6_saddr_score hiscore
;
850 struct inet6_ifaddr
*ifa_result
= NULL
;
851 int daddr_type
= __ipv6_addr_type(daddr
);
852 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
853 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
854 struct net_device
*dev
;
856 memset(&hiscore
, 0, sizeof(hiscore
));
858 read_lock(&dev_base_lock
);
861 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
862 struct inet6_dev
*idev
;
863 struct inet6_ifaddr
*ifa
;
865 /* Rule 0: Candidate Source Address (section 4)
866 * - multicast and link-local destination address,
867 * the set of candidate source address MUST only
868 * include addresses assigned to interfaces
869 * belonging to the same link as the outgoing
871 * (- For site-local destination addresses, the
872 * set of candidate source addresses MUST only
873 * include addresses assigned to interfaces
874 * belonging to the same site as the outgoing
877 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
878 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
879 daddr_dev
&& dev
!= daddr_dev
)
882 idev
= __in6_dev_get(dev
);
886 read_lock_bh(&idev
->lock
);
887 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
888 struct ipv6_saddr_score score
;
890 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
893 * - Tentative Address (RFC2462 section 5.4)
894 * - A tentative address is not considered
895 * "assigned to an interface" in the traditional
897 * - Candidate Source Address (section 4)
898 * - In any case, anycast addresses, multicast
899 * addresses, and the unspecified address MUST
900 * NOT be included in a candidate set.
902 if (ifa
->flags
& IFA_F_TENTATIVE
)
904 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
905 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
906 LIMIT_NETDEBUG(KERN_DEBUG
907 "ADDRCONF: unspecified / multicast address"
908 "assigned as unicast address on %s",
918 if (ifa_result
== NULL
) {
919 /* record it if the first available entry */
923 /* Rule 1: Prefer same address */
924 if (hiscore
.rule
< 1) {
925 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
926 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
929 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
930 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
931 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
936 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
940 /* Rule 2: Prefer appropriate scope */
941 if (hiscore
.rule
< 2) {
942 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
945 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
946 if (hiscore
.scope
< score
.scope
) {
947 if (hiscore
.scope
< daddr_scope
) {
952 } else if (score
.scope
< hiscore
.scope
) {
953 if (score
.scope
< daddr_scope
)
954 break; /* addresses sorted by scope */
961 /* Rule 3: Avoid deprecated address */
962 if (hiscore
.rule
< 3) {
963 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
964 !(ifa_result
->flags
& IFA_F_DEPRECATED
))
965 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
968 if (ipv6_saddr_preferred(score
.addr_type
) ||
969 !(ifa
->flags
& IFA_F_DEPRECATED
)) {
970 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
971 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
976 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
980 /* Rule 4: Prefer home address */
981 #ifdef CONFIG_IPV6_MIP6
982 if (hiscore
.rule
< 4) {
983 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
984 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
987 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
988 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
989 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
994 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
998 if (hiscore
.rule
< 4)
1002 /* Rule 5: Prefer outgoing interface */
1003 if (hiscore
.rule
< 5) {
1004 if (daddr_dev
== NULL
||
1005 daddr_dev
== ifa_result
->idev
->dev
)
1006 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1009 if (daddr_dev
== NULL
||
1010 daddr_dev
== ifa
->idev
->dev
) {
1011 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1012 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1017 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1021 /* Rule 6: Prefer matching label */
1022 if (hiscore
.rule
< 6) {
1023 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1024 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1027 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1028 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1029 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1034 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1038 #ifdef CONFIG_IPV6_PRIVACY
1039 /* Rule 7: Prefer public address
1040 * Note: prefer temprary address if use_tempaddr >= 2
1042 if (hiscore
.rule
< 7) {
1043 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1044 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1045 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1048 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1049 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1050 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1051 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1056 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1060 if (hiscore
.rule
< 7)
1063 /* Rule 8: Use longest matching prefix */
1064 if (hiscore
.rule
< 8) {
1065 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1068 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1069 if (score
.matchlen
> hiscore
.matchlen
) {
1074 else if (score
.matchlen
< hiscore
.matchlen
)
1078 /* Final Rule: choose first available one */
1082 in6_ifa_put(ifa_result
);
1087 read_unlock_bh(&idev
->lock
);
1090 read_unlock(&dev_base_lock
);
1093 return -EADDRNOTAVAIL
;
1095 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1096 in6_ifa_put(ifa_result
);
1101 int ipv6_get_saddr(struct dst_entry
*dst
,
1102 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1104 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1108 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
1110 struct inet6_dev
*idev
;
1111 int err
= -EADDRNOTAVAIL
;
1114 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1115 struct inet6_ifaddr
*ifp
;
1117 read_lock_bh(&idev
->lock
);
1118 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1119 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1120 ipv6_addr_copy(addr
, &ifp
->addr
);
1125 read_unlock_bh(&idev
->lock
);
1131 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1134 struct inet6_ifaddr
*ifp
;
1136 read_lock_bh(&idev
->lock
);
1137 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1139 read_unlock_bh(&idev
->lock
);
1143 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1145 struct inet6_ifaddr
* ifp
;
1146 u8 hash
= ipv6_addr_hash(addr
);
1148 read_lock_bh(&addrconf_hash_lock
);
1149 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1150 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1151 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1152 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1153 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1157 read_unlock_bh(&addrconf_hash_lock
);
1162 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1164 struct inet6_ifaddr
* ifp
;
1165 u8 hash
= ipv6_addr_hash(addr
);
1167 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1168 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1169 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1176 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1178 struct inet6_ifaddr
* ifp
;
1179 u8 hash
= ipv6_addr_hash(addr
);
1181 read_lock_bh(&addrconf_hash_lock
);
1182 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1183 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1184 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1185 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1191 read_unlock_bh(&addrconf_hash_lock
);
1196 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1198 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1199 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1200 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1201 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1202 int sk_ipv6only
= ipv6_only_sock(sk
);
1203 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1204 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1205 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1207 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1210 if (addr_type2
== IPV6_ADDR_ANY
&&
1211 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1214 if (addr_type
== IPV6_ADDR_ANY
&&
1215 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1218 if (sk2_rcv_saddr6
&&
1219 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1222 if (addr_type
== IPV6_ADDR_MAPPED
&&
1224 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1230 /* Gets referenced address, destroys ifaddr */
1232 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1234 if (ifp
->flags
&IFA_F_PERMANENT
) {
1235 spin_lock_bh(&ifp
->lock
);
1236 addrconf_del_timer(ifp
);
1237 ifp
->flags
|= IFA_F_TENTATIVE
;
1238 spin_unlock_bh(&ifp
->lock
);
1240 #ifdef CONFIG_IPV6_PRIVACY
1241 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1242 struct inet6_ifaddr
*ifpub
;
1243 spin_lock_bh(&ifp
->lock
);
1246 in6_ifa_hold(ifpub
);
1247 spin_unlock_bh(&ifp
->lock
);
1248 ipv6_create_tempaddr(ifpub
, ifp
);
1251 spin_unlock_bh(&ifp
->lock
);
1259 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1261 if (net_ratelimit())
1262 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1263 addrconf_dad_stop(ifp
);
1266 /* Join to solicited addr multicast group. */
1268 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1270 struct in6_addr maddr
;
1272 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1275 addrconf_addr_solict_mult(addr
, &maddr
);
1276 ipv6_dev_mc_inc(dev
, &maddr
);
1279 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1281 struct in6_addr maddr
;
1283 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1286 addrconf_addr_solict_mult(addr
, &maddr
);
1287 __ipv6_dev_mc_dec(idev
, &maddr
);
1290 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1292 struct in6_addr addr
;
1293 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1294 if (ipv6_addr_any(&addr
))
1296 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1299 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1301 struct in6_addr addr
;
1302 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1303 if (ipv6_addr_any(&addr
))
1305 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1308 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1310 if (dev
->addr_len
!= ETH_ALEN
)
1312 memcpy(eui
, dev
->dev_addr
, 3);
1313 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1316 * The zSeries OSA network cards can be shared among various
1317 * OS instances, but the OSA cards have only one MAC address.
1318 * This leads to duplicate address conflicts in conjunction
1319 * with IPv6 if more than one instance uses the same card.
1321 * The driver for these cards can deliver a unique 16-bit
1322 * identifier for each instance sharing the same card. It is
1323 * placed instead of 0xFFFE in the interface identifier. The
1324 * "u" bit of the interface identifier is not inverted in this
1325 * case. Hence the resulting interface identifier has local
1326 * scope according to RFC2373.
1329 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1330 eui
[4] = dev
->dev_id
& 0xFF;
1339 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1341 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1342 if (dev
->addr_len
!= ARCNET_ALEN
)
1345 eui
[7] = *(u8
*)dev
->dev_addr
;
1349 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1351 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1353 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1358 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1360 switch (dev
->type
) {
1363 case ARPHRD_IEEE802_TR
:
1364 return addrconf_ifid_eui48(eui
, dev
);
1366 return addrconf_ifid_arcnet(eui
, dev
);
1367 case ARPHRD_INFINIBAND
:
1368 return addrconf_ifid_infiniband(eui
, dev
);
1373 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1376 struct inet6_ifaddr
*ifp
;
1378 read_lock_bh(&idev
->lock
);
1379 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1380 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1381 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1386 read_unlock_bh(&idev
->lock
);
1390 #ifdef CONFIG_IPV6_PRIVACY
1391 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1392 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1395 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1396 idev
->rndid
[0] &= ~0x02;
1399 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1400 * check if generated address is not inappropriate
1402 * - Reserved subnet anycast (RFC 2526)
1403 * 11111101 11....11 1xxxxxxx
1404 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1405 * 00-00-5E-FE-xx-xx-xx-xx
1407 * - XXX: already assigned to an address on the device
1409 if (idev
->rndid
[0] == 0xfd &&
1410 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1411 (idev
->rndid
[7]&0x80))
1413 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1414 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1416 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1423 static void ipv6_regen_rndid(unsigned long data
)
1425 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1426 unsigned long expires
;
1429 write_lock_bh(&idev
->lock
);
1434 if (__ipv6_regen_rndid(idev
) < 0)
1438 idev
->cnf
.temp_prefered_lft
* HZ
-
1439 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1440 if (time_before(expires
, jiffies
)) {
1442 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1447 if (!mod_timer(&idev
->regen_timer
, expires
))
1451 write_unlock_bh(&idev
->lock
);
1452 rcu_read_unlock_bh();
1456 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1459 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1460 ret
= __ipv6_regen_rndid(idev
);
1470 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1471 unsigned long expires
, u32 flags
)
1473 struct fib6_config cfg
= {
1474 .fc_table
= RT6_TABLE_PREFIX
,
1475 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1476 .fc_ifindex
= dev
->ifindex
,
1477 .fc_expires
= expires
,
1479 .fc_flags
= RTF_UP
| flags
,
1482 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1484 /* Prevent useless cloning on PtP SIT.
1485 This thing is done here expecting that the whole
1486 class of non-broadcast devices need not cloning.
1488 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1489 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1490 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1493 ip6_route_add(&cfg
);
1496 /* Create "default" multicast route to the interface */
1498 static void addrconf_add_mroute(struct net_device
*dev
)
1500 struct fib6_config cfg
= {
1501 .fc_table
= RT6_TABLE_LOCAL
,
1502 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1503 .fc_ifindex
= dev
->ifindex
,
1508 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1510 ip6_route_add(&cfg
);
1513 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1514 static void sit_route_add(struct net_device
*dev
)
1516 struct fib6_config cfg
= {
1517 .fc_table
= RT6_TABLE_MAIN
,
1518 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1519 .fc_ifindex
= dev
->ifindex
,
1521 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1524 /* prefix length - 96 bits "::d.d.d.d" */
1525 ip6_route_add(&cfg
);
1529 static void addrconf_add_lroute(struct net_device
*dev
)
1531 struct in6_addr addr
;
1533 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1534 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1537 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1539 struct inet6_dev
*idev
;
1543 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1546 /* Add default multicast route */
1547 addrconf_add_mroute(dev
);
1549 /* Add link local route */
1550 addrconf_add_lroute(dev
);
1554 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1556 struct prefix_info
*pinfo
;
1560 unsigned long rt_expires
;
1561 struct inet6_dev
*in6_dev
;
1563 pinfo
= (struct prefix_info
*) opt
;
1565 if (len
< sizeof(struct prefix_info
)) {
1566 ADBG(("addrconf: prefix option too short\n"));
1571 * Validation checks ([ADDRCONF], page 19)
1574 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1576 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1579 valid_lft
= ntohl(pinfo
->valid
);
1580 prefered_lft
= ntohl(pinfo
->prefered
);
1582 if (prefered_lft
> valid_lft
) {
1583 if (net_ratelimit())
1584 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1588 in6_dev
= in6_dev_get(dev
);
1590 if (in6_dev
== NULL
) {
1591 if (net_ratelimit())
1592 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1597 * Two things going on here:
1598 * 1) Add routes for on-link prefixes
1599 * 2) Configure prefixes with the auto flag set
1602 /* Avoid arithmetic overflow. Really, we could
1603 save rt_expires in seconds, likely valid_lft,
1604 but it would require division in fib gc, that it
1607 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1608 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1610 rt_expires
= valid_lft
* HZ
;
1613 * We convert this (in jiffies) to clock_t later.
1614 * Avoid arithmetic overflow there as well.
1615 * Overflow can happen only if HZ < USER_HZ.
1617 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1618 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1620 if (pinfo
->onlink
) {
1621 struct rt6_info
*rt
;
1622 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1624 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1625 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1626 if (valid_lft
== 0) {
1630 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1633 } else if (valid_lft
) {
1634 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1635 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1638 dst_release(&rt
->u
.dst
);
1641 /* Try to figure out our local address for this prefix */
1643 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1644 struct inet6_ifaddr
* ifp
;
1645 struct in6_addr addr
;
1646 int create
= 0, update_lft
= 0;
1648 if (pinfo
->prefix_len
== 64) {
1649 memcpy(&addr
, &pinfo
->prefix
, 8);
1650 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1651 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1652 in6_dev_put(in6_dev
);
1657 if (net_ratelimit())
1658 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1660 in6_dev_put(in6_dev
);
1665 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1667 if (ifp
== NULL
&& valid_lft
) {
1668 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1670 /* Do not allow to create too much of autoconfigured
1671 * addresses; this would be too easy way to crash kernel.
1673 if (!max_addresses
||
1674 ipv6_count_addresses(in6_dev
) < max_addresses
)
1675 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1676 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1678 if (!ifp
|| IS_ERR(ifp
)) {
1679 in6_dev_put(in6_dev
);
1683 update_lft
= create
= 1;
1684 ifp
->cstamp
= jiffies
;
1685 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1691 #ifdef CONFIG_IPV6_PRIVACY
1692 struct inet6_ifaddr
*ift
;
1696 /* update lifetime (RFC2462 5.5.3 e) */
1697 spin_lock(&ifp
->lock
);
1699 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1700 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1703 if (!update_lft
&& stored_lft
) {
1704 if (valid_lft
> MIN_VALID_LIFETIME
||
1705 valid_lft
> stored_lft
)
1707 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1708 /* valid_lft <= stored_lft is always true */
1712 valid_lft
= MIN_VALID_LIFETIME
;
1713 if (valid_lft
< prefered_lft
)
1714 prefered_lft
= valid_lft
;
1720 ifp
->valid_lft
= valid_lft
;
1721 ifp
->prefered_lft
= prefered_lft
;
1724 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1725 spin_unlock(&ifp
->lock
);
1727 if (!(flags
&IFA_F_TENTATIVE
))
1728 ipv6_ifa_notify(0, ifp
);
1730 spin_unlock(&ifp
->lock
);
1732 #ifdef CONFIG_IPV6_PRIVACY
1733 read_lock_bh(&in6_dev
->lock
);
1734 /* update all temporary addresses in the list */
1735 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1737 * When adjusting the lifetimes of an existing
1738 * temporary address, only lower the lifetimes.
1739 * Implementations must not increase the
1740 * lifetimes of an existing temporary address
1741 * when processing a Prefix Information Option.
1743 spin_lock(&ift
->lock
);
1745 if (ift
->valid_lft
> valid_lft
&&
1746 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1747 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1748 if (ift
->prefered_lft
> prefered_lft
&&
1749 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1750 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1751 spin_unlock(&ift
->lock
);
1752 if (!(flags
&IFA_F_TENTATIVE
))
1753 ipv6_ifa_notify(0, ift
);
1756 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1758 * When a new public address is created as described in [ADDRCONF],
1759 * also create a new temporary address.
1761 read_unlock_bh(&in6_dev
->lock
);
1762 ipv6_create_tempaddr(ifp
, NULL
);
1764 read_unlock_bh(&in6_dev
->lock
);
1771 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1772 in6_dev_put(in6_dev
);
1776 * Set destination address.
1777 * Special case for SIT interfaces where we create a new "virtual"
1780 int addrconf_set_dstaddr(void __user
*arg
)
1782 struct in6_ifreq ireq
;
1783 struct net_device
*dev
;
1789 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1792 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1798 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1799 if (dev
->type
== ARPHRD_SIT
) {
1802 struct ip_tunnel_parm p
;
1804 err
= -EADDRNOTAVAIL
;
1805 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1808 memset(&p
, 0, sizeof(p
));
1809 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1813 p
.iph
.protocol
= IPPROTO_IPV6
;
1815 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1817 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1818 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1823 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1825 err
= dev_open(dev
);
1836 * Manual configuration of address on an interface
1838 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1839 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1841 struct inet6_ifaddr
*ifp
;
1842 struct inet6_dev
*idev
;
1843 struct net_device
*dev
;
1845 u32 flags
= RTF_EXPIRES
;
1849 /* check the lifetime */
1850 if (!valid_lft
|| prefered_lft
> valid_lft
)
1853 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1856 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1859 scope
= ipv6_addr_scope(pfx
);
1861 if (valid_lft
== INFINITY_LIFE_TIME
) {
1862 ifa_flags
|= IFA_F_PERMANENT
;
1864 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1865 valid_lft
= 0x7FFFFFFF/HZ
;
1867 if (prefered_lft
== 0)
1868 ifa_flags
|= IFA_F_DEPRECATED
;
1869 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1870 (prefered_lft
!= INFINITY_LIFE_TIME
))
1871 prefered_lft
= 0x7FFFFFFF/HZ
;
1873 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1876 spin_lock_bh(&ifp
->lock
);
1877 ifp
->valid_lft
= valid_lft
;
1878 ifp
->prefered_lft
= prefered_lft
;
1879 ifp
->tstamp
= jiffies
;
1880 spin_unlock_bh(&ifp
->lock
);
1882 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1883 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1884 addrconf_dad_start(ifp
, 0);
1890 return PTR_ERR(ifp
);
1893 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1895 struct inet6_ifaddr
*ifp
;
1896 struct inet6_dev
*idev
;
1897 struct net_device
*dev
;
1899 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1902 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1905 read_lock_bh(&idev
->lock
);
1906 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1907 if (ifp
->prefix_len
== plen
&&
1908 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1910 read_unlock_bh(&idev
->lock
);
1914 /* If the last address is deleted administratively,
1915 disable IPv6 on this interface.
1917 if (idev
->addr_list
== NULL
)
1918 addrconf_ifdown(idev
->dev
, 1);
1922 read_unlock_bh(&idev
->lock
);
1923 return -EADDRNOTAVAIL
;
1927 int addrconf_add_ifaddr(void __user
*arg
)
1929 struct in6_ifreq ireq
;
1932 if (!capable(CAP_NET_ADMIN
))
1935 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1939 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
1940 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
1945 int addrconf_del_ifaddr(void __user
*arg
)
1947 struct in6_ifreq ireq
;
1950 if (!capable(CAP_NET_ADMIN
))
1953 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1957 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1962 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1963 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1965 struct inet6_ifaddr
* ifp
;
1966 struct in6_addr addr
;
1967 struct net_device
*dev
;
1972 memset(&addr
, 0, sizeof(struct in6_addr
));
1973 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1975 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1976 addr
.s6_addr32
[0] = htonl(0xfe800000);
1979 scope
= IPV6_ADDR_COMPATv4
;
1982 if (addr
.s6_addr32
[3]) {
1983 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1985 spin_lock_bh(&ifp
->lock
);
1986 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1987 spin_unlock_bh(&ifp
->lock
);
1988 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1994 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1995 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
1996 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1997 struct in_ifaddr
* ifa
;
2001 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2004 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2006 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2008 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2009 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2013 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2018 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2021 spin_lock_bh(&ifp
->lock
);
2022 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2023 spin_unlock_bh(&ifp
->lock
);
2024 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2033 static void init_loopback(struct net_device
*dev
)
2035 struct inet6_dev
*idev
;
2036 struct inet6_ifaddr
* ifp
;
2042 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2043 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2047 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2049 spin_lock_bh(&ifp
->lock
);
2050 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2051 spin_unlock_bh(&ifp
->lock
);
2052 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2057 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2059 struct inet6_ifaddr
* ifp
;
2061 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
2063 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2064 addrconf_dad_start(ifp
, 0);
2069 static void addrconf_dev_config(struct net_device
*dev
)
2071 struct in6_addr addr
;
2072 struct inet6_dev
* idev
;
2076 if ((dev
->type
!= ARPHRD_ETHER
) &&
2077 (dev
->type
!= ARPHRD_FDDI
) &&
2078 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2079 (dev
->type
!= ARPHRD_ARCNET
) &&
2080 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2081 /* Alas, we support only Ethernet autoconfiguration. */
2085 idev
= addrconf_add_dev(dev
);
2089 memset(&addr
, 0, sizeof(struct in6_addr
));
2090 addr
.s6_addr32
[0] = htonl(0xFE800000);
2092 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2093 addrconf_add_linklocal(idev
, &addr
);
2096 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2097 static void addrconf_sit_config(struct net_device
*dev
)
2099 struct inet6_dev
*idev
;
2104 * Configure the tunnel with one of our IPv4
2105 * addresses... we should configure all of
2106 * our v4 addrs in the tunnel
2109 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2110 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2114 sit_add_v4_addrs(idev
);
2116 if (dev
->flags
&IFF_POINTOPOINT
) {
2117 addrconf_add_mroute(dev
);
2118 addrconf_add_lroute(dev
);
2125 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2127 struct in6_addr lladdr
;
2129 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
2130 addrconf_add_linklocal(idev
, &lladdr
);
2136 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2138 struct net_device
*link_dev
;
2140 /* first try to inherit the link-local address from the link device */
2141 if (idev
->dev
->iflink
&&
2142 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2143 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2146 /* then try to inherit it from any device */
2147 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2148 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2151 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2155 * Autoconfigure tunnel with a link-local address so routing protocols,
2156 * DHCPv6, MLD etc. can be run over the virtual link
2159 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2161 struct inet6_dev
*idev
;
2165 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2166 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2169 ip6_tnl_add_linklocal(idev
);
2172 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2175 struct net_device
*dev
= (struct net_device
*) data
;
2176 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2177 int run_pending
= 0;
2180 case NETDEV_REGISTER
:
2182 idev
= ipv6_add_dev(dev
);
2184 printk(KERN_WARNING
"IPv6: add_dev failed for %s\n",
2190 if (event
== NETDEV_UP
) {
2191 if (!netif_carrier_ok(dev
)) {
2192 /* device is not ready yet. */
2194 "ADDRCONF(NETDEV_UP): %s: "
2195 "link is not ready\n",
2201 idev
->if_flags
|= IF_READY
;
2203 if (!netif_carrier_ok(dev
)) {
2204 /* device is still not ready. */
2209 if (idev
->if_flags
& IF_READY
) {
2210 /* device is already configured. */
2213 idev
->if_flags
|= IF_READY
;
2217 "ADDRCONF(NETDEV_CHANGE): %s: "
2218 "link becomes ready\n",
2225 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2227 addrconf_sit_config(dev
);
2230 case ARPHRD_TUNNEL6
:
2231 addrconf_ip6_tnl_config(dev
);
2233 case ARPHRD_LOOPBACK
:
2238 addrconf_dev_config(dev
);
2243 addrconf_dad_run(idev
);
2245 /* If the MTU changed during the interface down, when the
2246 interface up, the changed MTU must be reflected in the
2247 idev as well as routers.
2249 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2250 rt6_mtu_change(dev
, dev
->mtu
);
2251 idev
->cnf
.mtu6
= dev
->mtu
;
2253 idev
->tstamp
= jiffies
;
2254 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2255 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2256 stop IPv6 on this interface.
2258 if (dev
->mtu
< IPV6_MIN_MTU
)
2259 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2263 case NETDEV_CHANGEMTU
:
2264 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2265 rt6_mtu_change(dev
, dev
->mtu
);
2266 idev
->cnf
.mtu6
= dev
->mtu
;
2270 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2273 case NETDEV_UNREGISTER
:
2275 * Remove all addresses from this interface.
2277 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2280 case NETDEV_CHANGENAME
:
2281 #ifdef CONFIG_SYSCTL
2283 addrconf_sysctl_unregister(&idev
->cnf
);
2284 neigh_sysctl_unregister(idev
->nd_parms
);
2285 neigh_sysctl_register(dev
, idev
->nd_parms
,
2286 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2287 &ndisc_ifinfo_sysctl_change
,
2289 addrconf_sysctl_register(idev
, &idev
->cnf
);
2299 * addrconf module should be notified of a device going up
2301 static struct notifier_block ipv6_dev_notf
= {
2302 .notifier_call
= addrconf_notify
,
2306 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2308 struct inet6_dev
*idev
;
2309 struct inet6_ifaddr
*ifa
, **bifa
;
2314 if (dev
== &loopback_dev
&& how
== 1)
2318 neigh_ifdown(&nd_tbl
, dev
);
2320 idev
= __in6_dev_get(dev
);
2324 /* Step 1: remove reference to ipv6 device from parent device.
2330 /* protected by rtnl_lock */
2331 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2333 /* Step 1.5: remove snmp6 entry */
2334 snmp6_unregister_dev(idev
);
2338 /* Step 2: clear hash table */
2339 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2340 bifa
= &inet6_addr_lst
[i
];
2342 write_lock_bh(&addrconf_hash_lock
);
2343 while ((ifa
= *bifa
) != NULL
) {
2344 if (ifa
->idev
== idev
) {
2345 *bifa
= ifa
->lst_next
;
2346 ifa
->lst_next
= NULL
;
2347 addrconf_del_timer(ifa
);
2351 bifa
= &ifa
->lst_next
;
2353 write_unlock_bh(&addrconf_hash_lock
);
2356 write_lock_bh(&idev
->lock
);
2358 /* Step 3: clear flags for stateless addrconf */
2360 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2362 /* Step 4: clear address list */
2363 #ifdef CONFIG_IPV6_PRIVACY
2364 if (how
== 1 && del_timer(&idev
->regen_timer
))
2367 /* clear tempaddr list */
2368 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2369 idev
->tempaddr_list
= ifa
->tmp_next
;
2370 ifa
->tmp_next
= NULL
;
2372 write_unlock_bh(&idev
->lock
);
2373 spin_lock_bh(&ifa
->lock
);
2376 in6_ifa_put(ifa
->ifpub
);
2379 spin_unlock_bh(&ifa
->lock
);
2381 write_lock_bh(&idev
->lock
);
2384 while ((ifa
= idev
->addr_list
) != NULL
) {
2385 idev
->addr_list
= ifa
->if_next
;
2386 ifa
->if_next
= NULL
;
2388 addrconf_del_timer(ifa
);
2389 write_unlock_bh(&idev
->lock
);
2391 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2394 write_lock_bh(&idev
->lock
);
2396 write_unlock_bh(&idev
->lock
);
2398 /* Step 5: Discard multicast list */
2401 ipv6_mc_destroy_dev(idev
);
2405 /* Step 5: netlink notification of this interface */
2406 idev
->tstamp
= jiffies
;
2407 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2409 /* Shot the device (if unregistered) */
2412 #ifdef CONFIG_SYSCTL
2413 addrconf_sysctl_unregister(&idev
->cnf
);
2414 neigh_sysctl_unregister(idev
->nd_parms
);
2416 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2417 neigh_ifdown(&nd_tbl
, dev
);
2423 static void addrconf_rs_timer(unsigned long data
)
2425 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2427 if (ifp
->idev
->cnf
.forwarding
)
2430 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2432 * Announcement received after solicitation
2438 spin_lock(&ifp
->lock
);
2439 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2440 struct in6_addr all_routers
;
2442 /* The wait after the last probe can be shorter */
2443 addrconf_mod_timer(ifp
, AC_RS
,
2444 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2445 ifp
->idev
->cnf
.rtr_solicit_delay
:
2446 ifp
->idev
->cnf
.rtr_solicit_interval
);
2447 spin_unlock(&ifp
->lock
);
2449 ipv6_addr_all_routers(&all_routers
);
2451 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2453 spin_unlock(&ifp
->lock
);
2455 * Note: we do not support deprecated "all on-link"
2456 * assumption any longer.
2458 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2459 ifp
->idev
->dev
->name
);
2467 * Duplicate Address Detection
2469 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2471 unsigned long rand_num
;
2472 struct inet6_dev
*idev
= ifp
->idev
;
2474 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2475 ifp
->probes
= idev
->cnf
.dad_transmits
;
2476 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2479 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2481 struct inet6_dev
*idev
= ifp
->idev
;
2482 struct net_device
*dev
= idev
->dev
;
2484 addrconf_join_solict(dev
, &ifp
->addr
);
2486 net_srandom(ifp
->addr
.s6_addr32
[3]);
2488 read_lock_bh(&idev
->lock
);
2491 spin_lock_bh(&ifp
->lock
);
2493 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2494 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2495 ifp
->flags
& IFA_F_NODAD
) {
2496 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2497 spin_unlock_bh(&ifp
->lock
);
2498 read_unlock_bh(&idev
->lock
);
2500 addrconf_dad_completed(ifp
);
2504 if (!(idev
->if_flags
& IF_READY
)) {
2505 spin_unlock_bh(&ifp
->lock
);
2506 read_unlock_bh(&idev
->lock
);
2508 * If the defice is not ready:
2509 * - keep it tentative if it is a permanent address.
2510 * - otherwise, kill it.
2513 addrconf_dad_stop(ifp
);
2516 addrconf_dad_kick(ifp
);
2517 spin_unlock_bh(&ifp
->lock
);
2519 read_unlock_bh(&idev
->lock
);
2522 static void addrconf_dad_timer(unsigned long data
)
2524 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2525 struct inet6_dev
*idev
= ifp
->idev
;
2526 struct in6_addr unspec
;
2527 struct in6_addr mcaddr
;
2529 read_lock_bh(&idev
->lock
);
2531 read_unlock_bh(&idev
->lock
);
2534 spin_lock_bh(&ifp
->lock
);
2535 if (ifp
->probes
== 0) {
2537 * DAD was successful
2540 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2541 spin_unlock_bh(&ifp
->lock
);
2542 read_unlock_bh(&idev
->lock
);
2544 addrconf_dad_completed(ifp
);
2550 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2551 spin_unlock_bh(&ifp
->lock
);
2552 read_unlock_bh(&idev
->lock
);
2554 /* send a neighbour solicitation for our addr */
2555 memset(&unspec
, 0, sizeof(unspec
));
2556 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2557 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2562 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2564 struct net_device
* dev
= ifp
->idev
->dev
;
2567 * Configure the address for reception. Now it is valid.
2570 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2572 /* If added prefix is link local and forwarding is off,
2573 start sending router solicitations.
2576 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2577 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2578 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2579 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2580 struct in6_addr all_routers
;
2582 ipv6_addr_all_routers(&all_routers
);
2585 * If a host as already performed a random delay
2586 * [...] as part of DAD [...] there is no need
2587 * to delay again before sending the first RS
2589 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2591 spin_lock_bh(&ifp
->lock
);
2593 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2594 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2595 spin_unlock_bh(&ifp
->lock
);
2599 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2600 struct inet6_ifaddr
*ifp
;
2602 read_lock_bh(&idev
->lock
);
2603 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2604 spin_lock_bh(&ifp
->lock
);
2605 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2606 spin_unlock_bh(&ifp
->lock
);
2609 spin_unlock_bh(&ifp
->lock
);
2610 addrconf_dad_kick(ifp
);
2612 read_unlock_bh(&idev
->lock
);
2615 #ifdef CONFIG_PROC_FS
2616 struct if6_iter_state
{
2620 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2622 struct inet6_ifaddr
*ifa
= NULL
;
2623 struct if6_iter_state
*state
= seq
->private;
2625 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2626 ifa
= inet6_addr_lst
[state
->bucket
];
2633 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2635 struct if6_iter_state
*state
= seq
->private;
2637 ifa
= ifa
->lst_next
;
2639 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2640 ifa
= inet6_addr_lst
[state
->bucket
];
2646 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2648 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2651 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2653 return pos
? NULL
: ifa
;
2656 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2658 read_lock_bh(&addrconf_hash_lock
);
2659 return if6_get_idx(seq
, *pos
);
2662 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2664 struct inet6_ifaddr
*ifa
;
2666 ifa
= if6_get_next(seq
, v
);
2671 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2673 read_unlock_bh(&addrconf_hash_lock
);
2676 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2678 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2680 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2682 ifp
->idev
->dev
->ifindex
,
2686 ifp
->idev
->dev
->name
);
2690 static struct seq_operations if6_seq_ops
= {
2691 .start
= if6_seq_start
,
2692 .next
= if6_seq_next
,
2693 .show
= if6_seq_show
,
2694 .stop
= if6_seq_stop
,
2697 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2699 struct seq_file
*seq
;
2701 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2706 rc
= seq_open(file
, &if6_seq_ops
);
2710 seq
= file
->private_data
;
2719 static const struct file_operations if6_fops
= {
2720 .owner
= THIS_MODULE
,
2721 .open
= if6_seq_open
,
2723 .llseek
= seq_lseek
,
2724 .release
= seq_release_private
,
2727 int __init
if6_proc_init(void)
2729 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2734 void if6_proc_exit(void)
2736 proc_net_remove("if_inet6");
2738 #endif /* CONFIG_PROC_FS */
2740 #ifdef CONFIG_IPV6_MIP6
2741 /* Check if address is a home address configured on any interface. */
2742 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2745 struct inet6_ifaddr
* ifp
;
2746 u8 hash
= ipv6_addr_hash(addr
);
2747 read_lock_bh(&addrconf_hash_lock
);
2748 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2749 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2750 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2755 read_unlock_bh(&addrconf_hash_lock
);
2761 * Periodic address status verification
2764 static void addrconf_verify(unsigned long foo
)
2766 struct inet6_ifaddr
*ifp
;
2767 unsigned long now
, next
;
2770 spin_lock_bh(&addrconf_verify_lock
);
2772 next
= now
+ ADDR_CHECK_FREQUENCY
;
2774 del_timer(&addr_chk_timer
);
2776 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2779 read_lock(&addrconf_hash_lock
);
2780 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2782 #ifdef CONFIG_IPV6_PRIVACY
2783 unsigned long regen_advance
;
2786 if (ifp
->flags
& IFA_F_PERMANENT
)
2789 spin_lock(&ifp
->lock
);
2790 age
= (now
- ifp
->tstamp
) / HZ
;
2792 #ifdef CONFIG_IPV6_PRIVACY
2793 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2794 ifp
->idev
->cnf
.dad_transmits
*
2795 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2798 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2799 age
>= ifp
->valid_lft
) {
2800 spin_unlock(&ifp
->lock
);
2802 read_unlock(&addrconf_hash_lock
);
2805 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2806 spin_unlock(&ifp
->lock
);
2808 } else if (age
>= ifp
->prefered_lft
) {
2809 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2812 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2814 ifp
->flags
|= IFA_F_DEPRECATED
;
2817 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2818 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2820 spin_unlock(&ifp
->lock
);
2824 read_unlock(&addrconf_hash_lock
);
2826 ipv6_ifa_notify(0, ifp
);
2830 #ifdef CONFIG_IPV6_PRIVACY
2831 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2832 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2833 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2834 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2835 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2836 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2837 if (!ifp
->regen_count
&& ifpub
) {
2840 in6_ifa_hold(ifpub
);
2841 spin_unlock(&ifp
->lock
);
2842 read_unlock(&addrconf_hash_lock
);
2843 spin_lock(&ifpub
->lock
);
2844 ifpub
->regen_count
= 0;
2845 spin_unlock(&ifpub
->lock
);
2846 ipv6_create_tempaddr(ifpub
, ifp
);
2851 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2852 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2853 spin_unlock(&ifp
->lock
);
2856 /* ifp->prefered_lft <= ifp->valid_lft */
2857 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2858 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2859 spin_unlock(&ifp
->lock
);
2862 read_unlock(&addrconf_hash_lock
);
2865 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2866 add_timer(&addr_chk_timer
);
2867 spin_unlock_bh(&addrconf_verify_lock
);
2870 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2872 struct in6_addr
*pfx
= NULL
;
2875 pfx
= nla_data(addr
);
2878 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2881 pfx
= nla_data(local
);
2887 static struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] __read_mostly
= {
2888 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2889 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2890 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2894 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2896 struct ifaddrmsg
*ifm
;
2897 struct nlattr
*tb
[IFA_MAX
+1];
2898 struct in6_addr
*pfx
;
2901 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2905 ifm
= nlmsg_data(nlh
);
2906 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2910 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2913 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
2914 u32 prefered_lft
, u32 valid_lft
)
2916 u32 flags
= RTF_EXPIRES
;
2918 if (!valid_lft
|| (prefered_lft
> valid_lft
))
2921 if (valid_lft
== INFINITY_LIFE_TIME
) {
2922 ifa_flags
|= IFA_F_PERMANENT
;
2924 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
2925 valid_lft
= 0x7FFFFFFF/HZ
;
2927 if (prefered_lft
== 0)
2928 ifa_flags
|= IFA_F_DEPRECATED
;
2929 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
2930 (prefered_lft
!= INFINITY_LIFE_TIME
))
2931 prefered_lft
= 0x7FFFFFFF/HZ
;
2933 spin_lock_bh(&ifp
->lock
);
2934 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
2935 ifp
->tstamp
= jiffies
;
2936 ifp
->valid_lft
= valid_lft
;
2937 ifp
->prefered_lft
= prefered_lft
;
2939 spin_unlock_bh(&ifp
->lock
);
2940 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
2941 ipv6_ifa_notify(0, ifp
);
2943 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
2944 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
2951 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2953 struct ifaddrmsg
*ifm
;
2954 struct nlattr
*tb
[IFA_MAX
+1];
2955 struct in6_addr
*pfx
;
2956 struct inet6_ifaddr
*ifa
;
2957 struct net_device
*dev
;
2958 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
2962 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2966 ifm
= nlmsg_data(nlh
);
2967 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2971 if (tb
[IFA_CACHEINFO
]) {
2972 struct ifa_cacheinfo
*ci
;
2974 ci
= nla_data(tb
[IFA_CACHEINFO
]);
2975 valid_lft
= ci
->ifa_valid
;
2976 preferred_lft
= ci
->ifa_prefered
;
2978 preferred_lft
= INFINITY_LIFE_TIME
;
2979 valid_lft
= INFINITY_LIFE_TIME
;
2982 dev
= __dev_get_by_index(ifm
->ifa_index
);
2986 /* We ignore other flags so far. */
2987 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
2989 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
2992 * It would be best to check for !NLM_F_CREATE here but
2993 * userspace alreay relies on not having to provide this.
2995 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
2996 ifa_flags
, preferred_lft
, valid_lft
);
2999 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3000 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3003 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3010 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3011 u8 scope
, int ifindex
)
3013 struct ifaddrmsg
*ifm
;
3015 ifm
= nlmsg_data(nlh
);
3016 ifm
->ifa_family
= AF_INET6
;
3017 ifm
->ifa_prefixlen
= prefixlen
;
3018 ifm
->ifa_flags
= flags
;
3019 ifm
->ifa_scope
= scope
;
3020 ifm
->ifa_index
= ifindex
;
3023 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3024 unsigned long tstamp
, u32 preferred
, u32 valid
)
3026 struct ifa_cacheinfo ci
;
3028 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3029 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3030 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3031 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3032 ci
.ifa_prefered
= preferred
;
3033 ci
.ifa_valid
= valid
;
3035 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3038 static inline int rt_scope(int ifa_scope
)
3040 if (ifa_scope
& IFA_HOST
)
3041 return RT_SCOPE_HOST
;
3042 else if (ifa_scope
& IFA_LINK
)
3043 return RT_SCOPE_LINK
;
3044 else if (ifa_scope
& IFA_SITE
)
3045 return RT_SCOPE_SITE
;
3047 return RT_SCOPE_UNIVERSE
;
3050 static inline int inet6_ifaddr_msgsize(void)
3052 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3053 + nla_total_size(16) /* IFA_ADDRESS */
3054 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3057 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3058 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3060 struct nlmsghdr
*nlh
;
3061 u32 preferred
, valid
;
3063 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3067 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3068 ifa
->idev
->dev
->ifindex
);
3070 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3071 preferred
= ifa
->prefered_lft
;
3072 valid
= ifa
->valid_lft
;
3073 if (preferred
!= INFINITY_LIFE_TIME
) {
3074 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3076 if (valid
!= INFINITY_LIFE_TIME
)
3080 preferred
= INFINITY_LIFE_TIME
;
3081 valid
= INFINITY_LIFE_TIME
;
3084 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3085 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3086 nlmsg_cancel(skb
, nlh
);
3090 return nlmsg_end(skb
, nlh
);
3093 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3094 u32 pid
, u32 seq
, int event
, u16 flags
)
3096 struct nlmsghdr
*nlh
;
3097 u8 scope
= RT_SCOPE_UNIVERSE
;
3098 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3100 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3101 scope
= RT_SCOPE_SITE
;
3103 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3107 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3108 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3109 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3110 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3111 nlmsg_cancel(skb
, nlh
);
3115 return nlmsg_end(skb
, nlh
);
3118 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3119 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3121 struct nlmsghdr
*nlh
;
3122 u8 scope
= RT_SCOPE_UNIVERSE
;
3123 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3125 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3126 scope
= RT_SCOPE_SITE
;
3128 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3132 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3133 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3134 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3135 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3136 nlmsg_cancel(skb
, nlh
);
3140 return nlmsg_end(skb
, nlh
);
3150 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3151 enum addr_type_t type
)
3154 int s_idx
, s_ip_idx
;
3156 struct net_device
*dev
;
3157 struct inet6_dev
*idev
= NULL
;
3158 struct inet6_ifaddr
*ifa
;
3159 struct ifmcaddr6
*ifmca
;
3160 struct ifacaddr6
*ifaca
;
3162 s_idx
= cb
->args
[0];
3163 s_ip_idx
= ip_idx
= cb
->args
[1];
3164 read_lock(&dev_base_lock
);
3166 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
3172 if ((idev
= in6_dev_get(dev
)) == NULL
)
3174 read_lock_bh(&idev
->lock
);
3177 /* unicast address incl. temp addr */
3178 for (ifa
= idev
->addr_list
; ifa
;
3179 ifa
= ifa
->if_next
, ip_idx
++) {
3180 if (ip_idx
< s_ip_idx
)
3182 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3183 NETLINK_CB(cb
->skb
).pid
,
3184 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3189 case MULTICAST_ADDR
:
3190 /* multicast address */
3191 for (ifmca
= idev
->mc_list
; ifmca
;
3192 ifmca
= ifmca
->next
, ip_idx
++) {
3193 if (ip_idx
< s_ip_idx
)
3195 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3196 NETLINK_CB(cb
->skb
).pid
,
3197 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3203 /* anycast address */
3204 for (ifaca
= idev
->ac_list
; ifaca
;
3205 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3206 if (ip_idx
< s_ip_idx
)
3208 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3209 NETLINK_CB(cb
->skb
).pid
,
3210 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3218 read_unlock_bh(&idev
->lock
);
3223 read_unlock_bh(&idev
->lock
);
3226 read_unlock(&dev_base_lock
);
3228 cb
->args
[1] = ip_idx
;
3232 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3234 enum addr_type_t type
= UNICAST_ADDR
;
3235 return inet6_dump_addr(skb
, cb
, type
);
3238 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3240 enum addr_type_t type
= MULTICAST_ADDR
;
3241 return inet6_dump_addr(skb
, cb
, type
);
3245 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3247 enum addr_type_t type
= ANYCAST_ADDR
;
3248 return inet6_dump_addr(skb
, cb
, type
);
3251 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3254 struct ifaddrmsg
*ifm
;
3255 struct nlattr
*tb
[IFA_MAX
+1];
3256 struct in6_addr
*addr
= NULL
;
3257 struct net_device
*dev
= NULL
;
3258 struct inet6_ifaddr
*ifa
;
3259 struct sk_buff
*skb
;
3262 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3266 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3272 ifm
= nlmsg_data(nlh
);
3274 dev
= __dev_get_by_index(ifm
->ifa_index
);
3276 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3277 err
= -EADDRNOTAVAIL
;
3281 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3286 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3287 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3289 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3290 WARN_ON(err
== -EMSGSIZE
);
3294 err
= rtnl_unicast(skb
, NETLINK_CB(in_skb
).pid
);
3301 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3303 struct sk_buff
*skb
;
3306 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3310 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3312 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3313 WARN_ON(err
== -EMSGSIZE
);
3317 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3320 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3323 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3324 __s32
*array
, int bytes
)
3326 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3328 memset(array
, 0, bytes
);
3329 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3330 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3331 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3332 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3333 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3334 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3335 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3336 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3337 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3338 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3339 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3340 #ifdef CONFIG_IPV6_PRIVACY
3341 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3342 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3343 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3344 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3345 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3347 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3348 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3349 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3350 #ifdef CONFIG_IPV6_ROUTER_PREF
3351 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3352 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3353 #ifdef CONFIG_IPV6_ROUTE_INFO
3354 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3357 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3360 static inline size_t inet6_if_nlmsg_size(void)
3362 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3363 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3364 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3365 + nla_total_size(4) /* IFLA_MTU */
3366 + nla_total_size(4) /* IFLA_LINK */
3367 + nla_total_size( /* IFLA_PROTINFO */
3368 nla_total_size(4) /* IFLA_INET6_FLAGS */
3369 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3370 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3374 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3375 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3377 struct net_device
*dev
= idev
->dev
;
3378 struct nlattr
*conf
;
3379 struct ifinfomsg
*hdr
;
3380 struct nlmsghdr
*nlh
;
3382 struct ifla_cacheinfo ci
;
3384 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3388 hdr
= nlmsg_data(nlh
);
3389 hdr
->ifi_family
= AF_INET6
;
3391 hdr
->ifi_type
= dev
->type
;
3392 hdr
->ifi_index
= dev
->ifindex
;
3393 hdr
->ifi_flags
= dev_get_flags(dev
);
3394 hdr
->ifi_change
= 0;
3396 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3399 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3401 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3402 if (dev
->ifindex
!= dev
->iflink
)
3403 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3405 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3406 if (protoinfo
== NULL
)
3407 goto nla_put_failure
;
3409 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3411 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3412 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3413 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3414 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3415 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3416 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3418 conf
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3420 goto nla_put_failure
;
3421 ipv6_store_devconf(&idev
->cnf
, nla_data(conf
), nla_len(conf
));
3423 /* XXX - Statistics/MC not implemented */
3425 nla_nest_end(skb
, protoinfo
);
3426 return nlmsg_end(skb
, nlh
);
3429 nlmsg_cancel(skb
, nlh
);
3433 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3436 int s_idx
= cb
->args
[0];
3437 struct net_device
*dev
;
3438 struct inet6_dev
*idev
;
3440 read_lock(&dev_base_lock
);
3441 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3444 if ((idev
= in6_dev_get(dev
)) == NULL
)
3446 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3447 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3452 read_unlock(&dev_base_lock
);
3458 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3460 struct sk_buff
*skb
;
3463 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3467 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3469 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3470 WARN_ON(err
== -EMSGSIZE
);
3474 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3477 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3480 static inline size_t inet6_prefix_nlmsg_size(void)
3482 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3483 + nla_total_size(sizeof(struct in6_addr
))
3484 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3487 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3488 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3489 int event
, unsigned int flags
)
3491 struct prefixmsg
*pmsg
;
3492 struct nlmsghdr
*nlh
;
3493 struct prefix_cacheinfo ci
;
3495 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3499 pmsg
= nlmsg_data(nlh
);
3500 pmsg
->prefix_family
= AF_INET6
;
3501 pmsg
->prefix_pad1
= 0;
3502 pmsg
->prefix_pad2
= 0;
3503 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3504 pmsg
->prefix_len
= pinfo
->prefix_len
;
3505 pmsg
->prefix_type
= pinfo
->type
;
3506 pmsg
->prefix_pad3
= 0;
3507 pmsg
->prefix_flags
= 0;
3509 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3510 if (pinfo
->autoconf
)
3511 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3513 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3515 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3516 ci
.valid_time
= ntohl(pinfo
->valid
);
3517 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3519 return nlmsg_end(skb
, nlh
);
3522 nlmsg_cancel(skb
, nlh
);
3526 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3527 struct prefix_info
*pinfo
)
3529 struct sk_buff
*skb
;
3532 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3536 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3538 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3539 WARN_ON(err
== -EMSGSIZE
);
3543 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3546 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX
, err
);
3549 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3550 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3551 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3552 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3553 [RTM_GETADDR
- RTM_BASE
] = { .doit
= inet6_rtm_getaddr
,
3554 .dumpit
= inet6_dump_ifaddr
, },
3555 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3556 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3557 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3558 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3559 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3560 .dumpit
= inet6_dump_fib
, },
3561 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3562 [RTM_GETRULE
- RTM_BASE
] = { .dumpit
= fib6_rules_dump
, },
3566 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3568 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3572 ip6_ins_rt(ifp
->rt
);
3573 if (ifp
->idev
->cnf
.forwarding
)
3574 addrconf_join_anycast(ifp
);
3577 if (ifp
->idev
->cnf
.forwarding
)
3578 addrconf_leave_anycast(ifp
);
3579 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3580 dst_hold(&ifp
->rt
->u
.dst
);
3581 if (ip6_del_rt(ifp
->rt
))
3582 dst_free(&ifp
->rt
->u
.dst
);
3587 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3590 if (likely(ifp
->idev
->dead
== 0))
3591 __ipv6_ifa_notify(event
, ifp
);
3592 rcu_read_unlock_bh();
3595 #ifdef CONFIG_SYSCTL
3598 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3599 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3601 int *valp
= ctl
->data
;
3605 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3607 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3608 if (valp
!= &ipv6_devconf
.forwarding
) {
3609 if ((!*valp
) ^ (!val
)) {
3610 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3613 dev_forward_change(idev
);
3616 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3617 addrconf_forward_change();
3620 rt6_purge_dflt_routers();
3626 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3627 int __user
*name
, int nlen
,
3628 void __user
*oldval
,
3629 size_t __user
*oldlenp
,
3630 void __user
*newval
, size_t newlen
)
3632 int *valp
= table
->data
;
3635 if (!newval
|| !newlen
)
3637 if (newlen
!= sizeof(int))
3639 if (get_user(new, (int __user
*)newval
))
3643 if (oldval
&& oldlenp
) {
3645 if (get_user(len
, oldlenp
))
3648 if (len
> table
->maxlen
)
3649 len
= table
->maxlen
;
3650 if (copy_to_user(oldval
, valp
, len
))
3652 if (put_user(len
, oldlenp
))
3657 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3658 if (valp
!= &ipv6_devconf
.forwarding
) {
3659 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3661 if (unlikely(idev
== NULL
))
3663 changed
= (!*valp
) ^ (!new);
3666 dev_forward_change(idev
);
3669 addrconf_forward_change();
3673 rt6_purge_dflt_routers();
3680 static struct addrconf_sysctl_table
3682 struct ctl_table_header
*sysctl_header
;
3683 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3684 ctl_table addrconf_dev
[2];
3685 ctl_table addrconf_conf_dir
[2];
3686 ctl_table addrconf_proto_dir
[2];
3687 ctl_table addrconf_root_dir
[2];
3688 } addrconf_sysctl __read_mostly
= {
3689 .sysctl_header
= NULL
,
3692 .ctl_name
= NET_IPV6_FORWARDING
,
3693 .procname
= "forwarding",
3694 .data
= &ipv6_devconf
.forwarding
,
3695 .maxlen
= sizeof(int),
3697 .proc_handler
= &addrconf_sysctl_forward
,
3698 .strategy
= &addrconf_sysctl_forward_strategy
,
3701 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3702 .procname
= "hop_limit",
3703 .data
= &ipv6_devconf
.hop_limit
,
3704 .maxlen
= sizeof(int),
3706 .proc_handler
= proc_dointvec
,
3709 .ctl_name
= NET_IPV6_MTU
,
3711 .data
= &ipv6_devconf
.mtu6
,
3712 .maxlen
= sizeof(int),
3714 .proc_handler
= &proc_dointvec
,
3717 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3718 .procname
= "accept_ra",
3719 .data
= &ipv6_devconf
.accept_ra
,
3720 .maxlen
= sizeof(int),
3722 .proc_handler
= &proc_dointvec
,
3725 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3726 .procname
= "accept_redirects",
3727 .data
= &ipv6_devconf
.accept_redirects
,
3728 .maxlen
= sizeof(int),
3730 .proc_handler
= &proc_dointvec
,
3733 .ctl_name
= NET_IPV6_AUTOCONF
,
3734 .procname
= "autoconf",
3735 .data
= &ipv6_devconf
.autoconf
,
3736 .maxlen
= sizeof(int),
3738 .proc_handler
= &proc_dointvec
,
3741 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3742 .procname
= "dad_transmits",
3743 .data
= &ipv6_devconf
.dad_transmits
,
3744 .maxlen
= sizeof(int),
3746 .proc_handler
= &proc_dointvec
,
3749 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3750 .procname
= "router_solicitations",
3751 .data
= &ipv6_devconf
.rtr_solicits
,
3752 .maxlen
= sizeof(int),
3754 .proc_handler
= &proc_dointvec
,
3757 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3758 .procname
= "router_solicitation_interval",
3759 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3760 .maxlen
= sizeof(int),
3762 .proc_handler
= &proc_dointvec_jiffies
,
3763 .strategy
= &sysctl_jiffies
,
3766 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3767 .procname
= "router_solicitation_delay",
3768 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3769 .maxlen
= sizeof(int),
3771 .proc_handler
= &proc_dointvec_jiffies
,
3772 .strategy
= &sysctl_jiffies
,
3775 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3776 .procname
= "force_mld_version",
3777 .data
= &ipv6_devconf
.force_mld_version
,
3778 .maxlen
= sizeof(int),
3780 .proc_handler
= &proc_dointvec
,
3782 #ifdef CONFIG_IPV6_PRIVACY
3784 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3785 .procname
= "use_tempaddr",
3786 .data
= &ipv6_devconf
.use_tempaddr
,
3787 .maxlen
= sizeof(int),
3789 .proc_handler
= &proc_dointvec
,
3792 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3793 .procname
= "temp_valid_lft",
3794 .data
= &ipv6_devconf
.temp_valid_lft
,
3795 .maxlen
= sizeof(int),
3797 .proc_handler
= &proc_dointvec
,
3800 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3801 .procname
= "temp_prefered_lft",
3802 .data
= &ipv6_devconf
.temp_prefered_lft
,
3803 .maxlen
= sizeof(int),
3805 .proc_handler
= &proc_dointvec
,
3808 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3809 .procname
= "regen_max_retry",
3810 .data
= &ipv6_devconf
.regen_max_retry
,
3811 .maxlen
= sizeof(int),
3813 .proc_handler
= &proc_dointvec
,
3816 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3817 .procname
= "max_desync_factor",
3818 .data
= &ipv6_devconf
.max_desync_factor
,
3819 .maxlen
= sizeof(int),
3821 .proc_handler
= &proc_dointvec
,
3825 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3826 .procname
= "max_addresses",
3827 .data
= &ipv6_devconf
.max_addresses
,
3828 .maxlen
= sizeof(int),
3830 .proc_handler
= &proc_dointvec
,
3833 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3834 .procname
= "accept_ra_defrtr",
3835 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3836 .maxlen
= sizeof(int),
3838 .proc_handler
= &proc_dointvec
,
3841 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3842 .procname
= "accept_ra_pinfo",
3843 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3844 .maxlen
= sizeof(int),
3846 .proc_handler
= &proc_dointvec
,
3848 #ifdef CONFIG_IPV6_ROUTER_PREF
3850 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3851 .procname
= "accept_ra_rtr_pref",
3852 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3853 .maxlen
= sizeof(int),
3855 .proc_handler
= &proc_dointvec
,
3858 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
3859 .procname
= "router_probe_interval",
3860 .data
= &ipv6_devconf
.rtr_probe_interval
,
3861 .maxlen
= sizeof(int),
3863 .proc_handler
= &proc_dointvec_jiffies
,
3864 .strategy
= &sysctl_jiffies
,
3866 #ifdef CONFIG_IPV6_ROUTE_INFO
3868 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
3869 .procname
= "accept_ra_rt_info_max_plen",
3870 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
3871 .maxlen
= sizeof(int),
3873 .proc_handler
= &proc_dointvec
,
3878 .ctl_name
= NET_IPV6_PROXY_NDP
,
3879 .procname
= "proxy_ndp",
3880 .data
= &ipv6_devconf
.proxy_ndp
,
3881 .maxlen
= sizeof(int),
3883 .proc_handler
= &proc_dointvec
,
3886 .ctl_name
= 0, /* sentinel */
3891 .ctl_name
= NET_PROTO_CONF_ALL
,
3894 .child
= addrconf_sysctl
.addrconf_vars
,
3897 .ctl_name
= 0, /* sentinel */
3900 .addrconf_conf_dir
= {
3902 .ctl_name
= NET_IPV6_CONF
,
3905 .child
= addrconf_sysctl
.addrconf_dev
,
3908 .ctl_name
= 0, /* sentinel */
3911 .addrconf_proto_dir
= {
3913 .ctl_name
= NET_IPV6
,
3916 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3919 .ctl_name
= 0, /* sentinel */
3922 .addrconf_root_dir
= {
3924 .ctl_name
= CTL_NET
,
3927 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3930 .ctl_name
= 0, /* sentinel */
3935 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3938 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3939 struct addrconf_sysctl_table
*t
;
3940 char *dev_name
= NULL
;
3942 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
3945 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3946 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3947 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3950 dev_name
= dev
->name
;
3951 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3953 dev_name
= "default";
3954 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3958 * Make a copy of dev_name, because '.procname' is regarded as const
3959 * by sysctl and we wouldn't want anyone to change it under our feet
3960 * (see SIOCSIFNAME).
3962 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3966 t
->addrconf_dev
[0].procname
= dev_name
;
3968 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3969 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3970 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3971 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3973 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
3974 if (t
->sysctl_header
== NULL
)
3989 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3992 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3994 unregister_sysctl_table(t
->sysctl_header
);
3995 kfree(t
->addrconf_dev
[0].procname
);
4007 int register_inet6addr_notifier(struct notifier_block
*nb
)
4009 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4012 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4014 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4018 * Init / cleanup code
4021 int __init
addrconf_init(void)
4025 /* The addrconf netdev notifier requires that loopback_dev
4026 * has it's ipv6 private information allocated and setup
4027 * before it can bring up and give link-local addresses
4028 * to other devices which are up.
4030 * Unfortunately, loopback_dev is not necessarily the first
4031 * entry in the global dev_base list of net devices. In fact,
4032 * it is likely to be the very last entry on that list.
4033 * So this causes the notifier registry below to try and
4034 * give link-local addresses to all devices besides loopback_dev
4035 * first, then loopback_dev, which cases all the non-loopback_dev
4036 * devices to fail to get a link-local address.
4038 * So, as a temporary fix, allocate the ipv6 structure for
4039 * loopback_dev first by hand.
4040 * Longer term, all of the dependencies ipv6 has upon the loopback
4041 * device and it being up should be removed.
4044 if (!ipv6_add_dev(&loopback_dev
))
4050 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4052 register_netdevice_notifier(&ipv6_dev_notf
);
4055 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
4056 #ifdef CONFIG_SYSCTL
4057 addrconf_sysctl
.sysctl_header
=
4058 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4059 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4065 void __exit
addrconf_cleanup(void)
4067 struct net_device
*dev
;
4068 struct inet6_dev
*idev
;
4069 struct inet6_ifaddr
*ifa
;
4072 unregister_netdevice_notifier(&ipv6_dev_notf
);
4074 rtnetlink_links
[PF_INET6
] = NULL
;
4075 #ifdef CONFIG_SYSCTL
4076 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4077 addrconf_sysctl_unregister(&ipv6_devconf
);
4086 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
4087 if ((idev
= __in6_dev_get(dev
)) == NULL
)
4089 addrconf_ifdown(dev
, 1);
4091 addrconf_ifdown(&loopback_dev
, 2);
4097 write_lock_bh(&addrconf_hash_lock
);
4098 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4099 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4100 struct inet6_ifaddr
*bifa
;
4103 ifa
= ifa
->lst_next
;
4104 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4105 /* Do not free it; something is wrong.
4106 Now we can investigate it with debugger.
4110 write_unlock_bh(&addrconf_hash_lock
);
4112 del_timer(&addr_chk_timer
);
4116 #ifdef CONFIG_PROC_FS
4117 proc_net_remove("if_inet6");