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
40 #include <linux/config.h>
41 #include <linux/errno.h>
42 #include <linux/types.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/sched.h>
46 #include <linux/net.h>
47 #include <linux/in6.h>
48 #include <linux/netdevice.h>
49 #include <linux/if_arp.h>
50 #include <linux/if_arcnet.h>
51 #include <linux/if_infiniband.h>
52 #include <linux/route.h>
53 #include <linux/inetdevice.h>
54 #include <linux/init.h>
56 #include <linux/sysctl.h>
58 #include <linux/delay.h>
59 #include <linux/notifier.h>
65 #include <net/protocol.h>
66 #include <net/ndisc.h>
67 #include <net/ip6_route.h>
68 #include <net/addrconf.h>
71 #include <linux/if_tunnel.h>
72 #include <linux/rtnetlink.h>
74 #ifdef CONFIG_IPV6_PRIVACY
75 #include <linux/random.h>
76 #include <linux/crypto.h>
77 #include <asm/scatterlist.h>
80 #include <asm/uaccess.h>
82 #include <linux/proc_fs.h>
83 #include <linux/seq_file.h>
85 /* Set to 3 to get tracing... */
89 #define ADBG(x) printk x
94 #define INFINITY_LIFE_TIME 0xFFFFFFFF
95 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
98 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
99 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
102 #ifdef CONFIG_IPV6_PRIVACY
103 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
104 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
105 static void ipv6_regen_rndid(unsigned long data
);
107 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
108 static struct crypto_tfm
*md5_tfm
;
109 static DEFINE_SPINLOCK(md5_tfm_lock
);
112 static int ipv6_count_addresses(struct inet6_dev
*idev
);
115 * Configured unicast address hash table
117 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
118 static DEFINE_RWLOCK(addrconf_hash_lock
);
120 /* Protects inet6 devices */
121 DEFINE_RWLOCK(addrconf_lock
);
123 static void addrconf_verify(unsigned long);
125 static struct timer_list addr_chk_timer
=
126 TIMER_INITIALIZER(addrconf_verify
, 0, 0);
127 static DEFINE_SPINLOCK(addrconf_verify_lock
);
129 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
130 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
132 static int addrconf_ifdown(struct net_device
*dev
, int how
);
134 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, int flags
);
135 static void addrconf_dad_timer(unsigned long data
);
136 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
137 static void addrconf_rs_timer(unsigned long data
);
138 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
141 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
142 struct prefix_info
*pinfo
);
143 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
145 static struct notifier_block
*inet6addr_chain
;
147 struct ipv6_devconf ipv6_devconf
= {
149 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
150 .mtu6
= IPV6_MIN_MTU
,
152 .accept_redirects
= 1,
154 .force_mld_version
= 0,
156 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
157 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
158 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
159 #ifdef CONFIG_IPV6_PRIVACY
161 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
162 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
163 .regen_max_retry
= REGEN_MAX_RETRY
,
164 .max_desync_factor
= MAX_DESYNC_FACTOR
,
166 .max_addresses
= IPV6_MAX_ADDRESSES
,
169 static struct ipv6_devconf ipv6_devconf_dflt
= {
171 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
172 .mtu6
= IPV6_MIN_MTU
,
174 .accept_redirects
= 1,
177 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
178 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
179 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
180 #ifdef CONFIG_IPV6_PRIVACY
182 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
183 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
184 .regen_max_retry
= REGEN_MAX_RETRY
,
185 .max_desync_factor
= MAX_DESYNC_FACTOR
,
187 .max_addresses
= IPV6_MAX_ADDRESSES
,
190 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
192 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
194 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
196 int ipv6_addr_type(const struct in6_addr
*addr
)
201 st
= addr
->s6_addr32
[0];
203 if ((st
& htonl(0xFF000000)) == htonl(0xFF000000)) {
204 type
= IPV6_ADDR_MULTICAST
;
206 switch((st
& htonl(0x00FF0000))) {
207 case __constant_htonl(0x00010000):
208 type
|= IPV6_ADDR_LOOPBACK
;
211 case __constant_htonl(0x00020000):
212 type
|= IPV6_ADDR_LINKLOCAL
;
215 case __constant_htonl(0x00050000):
216 type
|= IPV6_ADDR_SITELOCAL
;
222 type
= IPV6_ADDR_UNICAST
;
224 /* Consider all addresses with the first three bits different of
225 000 and 111 as finished.
227 if ((st
& htonl(0xE0000000)) != htonl(0x00000000) &&
228 (st
& htonl(0xE0000000)) != htonl(0xE0000000))
231 if ((st
& htonl(0xFFC00000)) == htonl(0xFE800000))
232 return (IPV6_ADDR_LINKLOCAL
| type
);
234 if ((st
& htonl(0xFFC00000)) == htonl(0xFEC00000))
235 return (IPV6_ADDR_SITELOCAL
| type
);
237 if ((addr
->s6_addr32
[0] | addr
->s6_addr32
[1]) == 0) {
238 if (addr
->s6_addr32
[2] == 0) {
239 if (addr
->s6_addr32
[3] == 0)
240 return IPV6_ADDR_ANY
;
242 if (addr
->s6_addr32
[3] == htonl(0x00000001))
243 return (IPV6_ADDR_LOOPBACK
| type
);
245 return (IPV6_ADDR_COMPATv4
| type
);
248 if (addr
->s6_addr32
[2] == htonl(0x0000ffff))
249 return IPV6_ADDR_MAPPED
;
252 st
&= htonl(0xFF000000);
254 return IPV6_ADDR_RESERVED
;
255 st
&= htonl(0xFE000000);
256 if (st
== htonl(0x02000000))
257 return IPV6_ADDR_RESERVED
; /* for NSAP */
258 if (st
== htonl(0x04000000))
259 return IPV6_ADDR_RESERVED
; /* for IPX */
263 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
265 if (del_timer(&ifp
->timer
))
269 enum addrconf_timer_t
276 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
277 enum addrconf_timer_t what
,
280 if (!del_timer(&ifp
->timer
))
285 ifp
->timer
.function
= addrconf_dad_timer
;
288 ifp
->timer
.function
= addrconf_rs_timer
;
292 ifp
->timer
.expires
= jiffies
+ when
;
293 add_timer(&ifp
->timer
);
296 /* Nobody refers to this device, we may destroy it. */
298 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
300 struct net_device
*dev
= idev
->dev
;
301 BUG_TRAP(idev
->addr_list
==NULL
);
302 BUG_TRAP(idev
->mc_list
==NULL
);
303 #ifdef NET_REFCNT_DEBUG
304 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
308 printk("Freeing alive inet6 device %p\n", idev
);
311 snmp6_free_dev(idev
);
315 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
317 struct inet6_dev
*ndev
;
321 if (dev
->mtu
< IPV6_MIN_MTU
)
324 ndev
= kmalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
327 memset(ndev
, 0, sizeof(struct inet6_dev
));
329 rwlock_init(&ndev
->lock
);
331 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
332 ndev
->cnf
.mtu6
= dev
->mtu
;
333 ndev
->cnf
.sysctl
= NULL
;
334 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
335 if (ndev
->nd_parms
== NULL
) {
339 /* We refer to the device */
342 if (snmp6_alloc_dev(ndev
) < 0) {
344 "%s(): cannot allocate memory for statistics; dev=%s.\n",
345 __FUNCTION__
, dev
->name
));
346 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
348 in6_dev_finish_destroy(ndev
);
352 if (snmp6_register_dev(ndev
) < 0) {
354 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
355 __FUNCTION__
, dev
->name
));
356 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
358 in6_dev_finish_destroy(ndev
);
362 /* One reference from device. We must do this before
363 * we invoke __ipv6_regen_rndid().
367 #ifdef CONFIG_IPV6_PRIVACY
368 get_random_bytes(ndev
->rndid
, sizeof(ndev
->rndid
));
369 get_random_bytes(ndev
->entropy
, sizeof(ndev
->entropy
));
370 init_timer(&ndev
->regen_timer
);
371 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
372 ndev
->regen_timer
.data
= (unsigned long) ndev
;
373 if ((dev
->flags
&IFF_LOOPBACK
) ||
374 dev
->type
== ARPHRD_TUNNEL
||
375 dev
->type
== ARPHRD_NONE
||
376 dev
->type
== ARPHRD_SIT
) {
378 "Disabled Privacy Extensions on device %p(%s)\n",
380 ndev
->cnf
.use_tempaddr
= -1;
383 ipv6_regen_rndid((unsigned long) ndev
);
387 write_lock_bh(&addrconf_lock
);
389 write_unlock_bh(&addrconf_lock
);
391 ipv6_mc_init_dev(ndev
);
392 ndev
->tstamp
= jiffies
;
394 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
395 NET_IPV6_NEIGH
, "ipv6",
396 &ndisc_ifinfo_sysctl_change
,
398 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
404 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
406 struct inet6_dev
*idev
;
410 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
411 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
414 if (dev
->flags
&IFF_UP
)
420 static void dev_forward_change(struct inet6_dev
*idev
)
422 struct net_device
*dev
;
423 struct inet6_ifaddr
*ifa
;
424 struct in6_addr addr
;
429 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
430 ipv6_addr_all_routers(&addr
);
432 if (idev
->cnf
.forwarding
)
433 ipv6_dev_mc_inc(dev
, &addr
);
435 ipv6_dev_mc_dec(dev
, &addr
);
437 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
438 if (idev
->cnf
.forwarding
)
439 addrconf_join_anycast(ifa
);
441 addrconf_leave_anycast(ifa
);
446 static void addrconf_forward_change(void)
448 struct net_device
*dev
;
449 struct inet6_dev
*idev
;
451 read_lock(&dev_base_lock
);
452 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
453 read_lock(&addrconf_lock
);
454 idev
= __in6_dev_get(dev
);
456 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
457 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
459 dev_forward_change(idev
);
461 read_unlock(&addrconf_lock
);
463 read_unlock(&dev_base_lock
);
467 /* Nobody refers to this ifaddr, destroy it */
469 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
471 BUG_TRAP(ifp
->if_next
==NULL
);
472 BUG_TRAP(ifp
->lst_next
==NULL
);
473 #ifdef NET_REFCNT_DEBUG
474 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
477 in6_dev_put(ifp
->idev
);
479 if (del_timer(&ifp
->timer
))
480 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
483 printk("Freeing alive inet6 address %p\n", ifp
);
486 dst_release(&ifp
->rt
->u
.dst
);
491 /* On success it returns ifp with increased reference count */
493 static struct inet6_ifaddr
*
494 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
495 int scope
, unsigned flags
)
497 struct inet6_ifaddr
*ifa
= NULL
;
502 read_lock_bh(&addrconf_lock
);
504 err
= -ENODEV
; /*XXX*/
508 write_lock(&addrconf_hash_lock
);
510 /* Ignore adding duplicate addresses on an interface */
511 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
512 ADBG(("ipv6_add_addr: already assigned\n"));
517 ifa
= kmalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
520 ADBG(("ipv6_add_addr: malloc failed\n"));
525 rt
= addrconf_dst_alloc(idev
, addr
, 0);
531 memset(ifa
, 0, sizeof(struct inet6_ifaddr
));
532 ipv6_addr_copy(&ifa
->addr
, addr
);
534 spin_lock_init(&ifa
->lock
);
535 init_timer(&ifa
->timer
);
536 ifa
->timer
.data
= (unsigned long) ifa
;
538 ifa
->prefix_len
= pfxlen
;
539 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
540 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
547 /* Add to big hash table */
548 hash
= ipv6_addr_hash(addr
);
550 ifa
->lst_next
= inet6_addr_lst
[hash
];
551 inet6_addr_lst
[hash
] = ifa
;
553 write_unlock(&addrconf_hash_lock
);
555 write_lock(&idev
->lock
);
556 /* Add to inet6_dev unicast addr list. */
557 ifa
->if_next
= idev
->addr_list
;
558 idev
->addr_list
= ifa
;
560 #ifdef CONFIG_IPV6_PRIVACY
561 if (ifa
->flags
&IFA_F_TEMPORARY
) {
562 ifa
->tmp_next
= idev
->tempaddr_list
;
563 idev
->tempaddr_list
= ifa
;
571 write_unlock(&idev
->lock
);
573 read_unlock_bh(&addrconf_lock
);
575 if (likely(err
== 0))
576 notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
584 write_unlock(&addrconf_hash_lock
);
588 /* This function wants to get referenced ifp and releases it before return */
590 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
592 struct inet6_ifaddr
*ifa
, **ifap
;
593 struct inet6_dev
*idev
= ifp
->idev
;
595 int deleted
= 0, onlink
= 0;
596 unsigned long expires
= jiffies
;
598 hash
= ipv6_addr_hash(&ifp
->addr
);
602 write_lock_bh(&addrconf_hash_lock
);
603 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
604 ifap
= &ifa
->lst_next
) {
606 *ifap
= ifa
->lst_next
;
608 ifa
->lst_next
= NULL
;
612 write_unlock_bh(&addrconf_hash_lock
);
614 write_lock_bh(&idev
->lock
);
615 #ifdef CONFIG_IPV6_PRIVACY
616 if (ifp
->flags
&IFA_F_TEMPORARY
) {
617 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
618 ifap
= &ifa
->tmp_next
) {
620 *ifap
= ifa
->tmp_next
;
622 in6_ifa_put(ifp
->ifpub
);
626 ifa
->tmp_next
= NULL
;
633 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;
634 ifap
= &ifa
->if_next
) {
636 *ifap
= ifa
->if_next
;
639 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
642 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
643 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
645 if (ifa
->flags
& IFA_F_PERMANENT
) {
650 unsigned long lifetime
;
655 spin_lock(&ifa
->lock
);
656 lifetime
= min_t(unsigned long,
657 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
658 if (time_before(expires
,
659 ifa
->tstamp
+ lifetime
* HZ
))
660 expires
= ifa
->tstamp
+ lifetime
* HZ
;
661 spin_unlock(&ifa
->lock
);
666 write_unlock_bh(&idev
->lock
);
668 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
670 notifier_call_chain(&inet6addr_chain
,NETDEV_DOWN
,ifp
);
672 addrconf_del_timer(ifp
);
675 * Purge or update corresponding prefix
677 * 1) we don't purge prefix here if address was not permanent.
678 * prefix is managed by its own lifetime.
679 * 2) if there're no addresses, delete prefix.
680 * 3) if there're still other permanent address(es),
681 * corresponding prefix is still permanent.
682 * 4) otherwise, update prefix lifetime to the
683 * longest valid lifetime among the corresponding
684 * addresses on the device.
685 * Note: subsequent RA will update lifetime.
689 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
690 struct in6_addr prefix
;
693 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
694 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
696 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
698 ip6_del_rt(rt
, NULL
, NULL
);
700 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
701 rt
->rt6i_expires
= expires
;
702 rt
->rt6i_flags
|= RTF_EXPIRES
;
705 dst_release(&rt
->u
.dst
);
711 #ifdef CONFIG_IPV6_PRIVACY
712 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
714 struct inet6_dev
*idev
= ifp
->idev
;
715 struct in6_addr addr
, *tmpaddr
;
716 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
721 write_lock(&idev
->lock
);
723 spin_lock_bh(&ift
->lock
);
724 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
725 spin_unlock_bh(&ift
->lock
);
732 if (idev
->cnf
.use_tempaddr
<= 0) {
733 write_unlock(&idev
->lock
);
735 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
740 spin_lock_bh(&ifp
->lock
);
741 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
742 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
743 spin_unlock_bh(&ifp
->lock
);
744 write_unlock(&idev
->lock
);
746 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
752 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
753 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
754 spin_unlock_bh(&ifp
->lock
);
755 write_unlock(&idev
->lock
);
757 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
763 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
764 tmp_valid_lft
= min_t(__u32
,
766 idev
->cnf
.temp_valid_lft
);
767 tmp_prefered_lft
= min_t(__u32
,
769 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
770 tmp_plen
= ifp
->prefix_len
;
771 max_addresses
= idev
->cnf
.max_addresses
;
772 tmp_cstamp
= ifp
->cstamp
;
773 tmp_tstamp
= ifp
->tstamp
;
774 spin_unlock_bh(&ifp
->lock
);
776 write_unlock(&idev
->lock
);
777 ift
= !max_addresses
||
778 ipv6_count_addresses(idev
) < max_addresses
?
779 ipv6_add_addr(idev
, &addr
, tmp_plen
,
780 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
781 if (!ift
|| IS_ERR(ift
)) {
785 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
787 write_lock(&idev
->lock
);
791 spin_lock_bh(&ift
->lock
);
793 ift
->valid_lft
= tmp_valid_lft
;
794 ift
->prefered_lft
= tmp_prefered_lft
;
795 ift
->cstamp
= tmp_cstamp
;
796 ift
->tstamp
= tmp_tstamp
;
797 spin_unlock_bh(&ift
->lock
);
799 addrconf_dad_start(ift
, 0);
808 * Choose an appropriate source address
810 * i) get an address with an appropriate scope
811 * ii) see if there is a specific route for the destination and use
812 * an address of the attached interface
813 * iii) don't use deprecated addresses
815 static int inline ipv6_saddr_pref(const struct inet6_ifaddr
*ifp
, u8 invpref
)
818 pref
= ifp
->flags
&IFA_F_DEPRECATED
? 0 : 2;
819 #ifdef CONFIG_IPV6_PRIVACY
820 pref
|= (ifp
->flags
^invpref
)&IFA_F_TEMPORARY
? 0 : 1;
825 #ifdef CONFIG_IPV6_PRIVACY
826 #define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3)
828 #define IPV6_GET_SADDR_MAXSCORE(score) (score)
831 int ipv6_dev_get_saddr(struct net_device
*dev
,
832 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
834 struct inet6_ifaddr
*ifp
= NULL
;
835 struct inet6_ifaddr
*match
= NULL
;
836 struct inet6_dev
*idev
;
839 int hiscore
= -1, score
;
841 scope
= ipv6_addr_scope(daddr
);
845 * search dev and walk through dev addresses
849 if (dev
->flags
& IFF_LOOPBACK
)
852 read_lock(&addrconf_lock
);
853 idev
= __in6_dev_get(dev
);
855 read_lock_bh(&idev
->lock
);
856 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
857 if (ifp
->scope
== scope
) {
858 if (ifp
->flags
&IFA_F_TENTATIVE
)
860 #ifdef CONFIG_IPV6_PRIVACY
861 score
= ipv6_saddr_pref(ifp
, idev
->cnf
.use_tempaddr
> 1 ? IFA_F_TEMPORARY
: 0);
863 score
= ipv6_saddr_pref(ifp
, 0);
865 if (score
<= hiscore
)
874 if (IPV6_GET_SADDR_MAXSCORE(score
)) {
875 read_unlock_bh(&idev
->lock
);
876 read_unlock(&addrconf_lock
);
881 read_unlock_bh(&idev
->lock
);
883 read_unlock(&addrconf_lock
);
886 if (scope
== IFA_LINK
)
890 * dev == NULL or search failed for specified dev
893 read_lock(&dev_base_lock
);
894 read_lock(&addrconf_lock
);
895 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
896 idev
= __in6_dev_get(dev
);
898 read_lock_bh(&idev
->lock
);
899 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
900 if (ifp
->scope
== scope
) {
901 if (ifp
->flags
&IFA_F_TENTATIVE
)
903 #ifdef CONFIG_IPV6_PRIVACY
904 score
= ipv6_saddr_pref(ifp
, idev
->cnf
.use_tempaddr
> 1 ? IFA_F_TEMPORARY
: 0);
906 score
= ipv6_saddr_pref(ifp
, 0);
908 if (score
<= hiscore
)
917 if (IPV6_GET_SADDR_MAXSCORE(score
)) {
918 read_unlock_bh(&idev
->lock
);
919 goto out_unlock_base
;
923 read_unlock_bh(&idev
->lock
);
928 read_unlock(&addrconf_lock
);
929 read_unlock(&dev_base_lock
);
932 err
= -EADDRNOTAVAIL
;
934 ipv6_addr_copy(saddr
, &match
->addr
);
943 int ipv6_get_saddr(struct dst_entry
*dst
,
944 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
946 return ipv6_dev_get_saddr(dst
? ((struct rt6_info
*)dst
)->rt6i_idev
->dev
: NULL
, daddr
, saddr
);
950 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
952 struct inet6_dev
*idev
;
953 int err
= -EADDRNOTAVAIL
;
955 read_lock(&addrconf_lock
);
956 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
957 struct inet6_ifaddr
*ifp
;
959 read_lock_bh(&idev
->lock
);
960 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
961 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
962 ipv6_addr_copy(addr
, &ifp
->addr
);
967 read_unlock_bh(&idev
->lock
);
969 read_unlock(&addrconf_lock
);
973 static int ipv6_count_addresses(struct inet6_dev
*idev
)
976 struct inet6_ifaddr
*ifp
;
978 read_lock_bh(&idev
->lock
);
979 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
981 read_unlock_bh(&idev
->lock
);
985 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
987 struct inet6_ifaddr
* ifp
;
988 u8 hash
= ipv6_addr_hash(addr
);
990 read_lock_bh(&addrconf_hash_lock
);
991 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
992 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
993 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
994 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
995 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
999 read_unlock_bh(&addrconf_hash_lock
);
1004 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1006 struct inet6_ifaddr
* ifp
;
1007 u8 hash
= ipv6_addr_hash(addr
);
1009 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1010 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1011 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1018 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1020 struct inet6_ifaddr
* ifp
;
1021 u8 hash
= ipv6_addr_hash(addr
);
1023 read_lock_bh(&addrconf_hash_lock
);
1024 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1025 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1026 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1027 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1033 read_unlock_bh(&addrconf_hash_lock
);
1038 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1040 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1041 const struct in6_addr
*sk2_rcv_saddr6
= tcp_v6_rcv_saddr(sk2
);
1042 u32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1043 u32 sk2_rcv_saddr
= tcp_v4_rcv_saddr(sk2
);
1044 int sk_ipv6only
= ipv6_only_sock(sk
);
1045 int sk2_ipv6only
= tcp_v6_ipv6only(sk2
);
1046 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1047 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1049 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1052 if (addr_type2
== IPV6_ADDR_ANY
&&
1053 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1056 if (addr_type
== IPV6_ADDR_ANY
&&
1057 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1060 if (sk2_rcv_saddr6
&&
1061 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1064 if (addr_type
== IPV6_ADDR_MAPPED
&&
1066 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1072 /* Gets referenced address, destroys ifaddr */
1074 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1076 if (net_ratelimit())
1077 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1078 if (ifp
->flags
&IFA_F_PERMANENT
) {
1079 spin_lock_bh(&ifp
->lock
);
1080 addrconf_del_timer(ifp
);
1081 ifp
->flags
|= IFA_F_TENTATIVE
;
1082 spin_unlock_bh(&ifp
->lock
);
1084 #ifdef CONFIG_IPV6_PRIVACY
1085 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1086 struct inet6_ifaddr
*ifpub
;
1087 spin_lock_bh(&ifp
->lock
);
1090 in6_ifa_hold(ifpub
);
1091 spin_unlock_bh(&ifp
->lock
);
1092 ipv6_create_tempaddr(ifpub
, ifp
);
1095 spin_unlock_bh(&ifp
->lock
);
1104 /* Join to solicited addr multicast group. */
1106 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1108 struct in6_addr maddr
;
1110 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1113 addrconf_addr_solict_mult(addr
, &maddr
);
1114 ipv6_dev_mc_inc(dev
, &maddr
);
1117 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1119 struct in6_addr maddr
;
1121 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1124 addrconf_addr_solict_mult(addr
, &maddr
);
1125 __ipv6_dev_mc_dec(idev
, &maddr
);
1128 void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1130 struct in6_addr addr
;
1131 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1132 if (ipv6_addr_any(&addr
))
1134 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1137 void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1139 struct in6_addr addr
;
1140 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1141 if (ipv6_addr_any(&addr
))
1143 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1146 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1148 switch (dev
->type
) {
1151 case ARPHRD_IEEE802_TR
:
1152 if (dev
->addr_len
!= ETH_ALEN
)
1154 memcpy(eui
, dev
->dev_addr
, 3);
1155 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1158 * The zSeries OSA network cards can be shared among various
1159 * OS instances, but the OSA cards have only one MAC address.
1160 * This leads to duplicate address conflicts in conjunction
1161 * with IPv6 if more than one instance uses the same card.
1163 * The driver for these cards can deliver a unique 16-bit
1164 * identifier for each instance sharing the same card. It is
1165 * placed instead of 0xFFFE in the interface identifier. The
1166 * "u" bit of the interface identifier is not inverted in this
1167 * case. Hence the resulting interface identifier has local
1168 * scope according to RFC2373.
1171 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1172 eui
[4] = dev
->dev_id
& 0xFF;
1180 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1181 if (dev
->addr_len
!= ARCNET_ALEN
)
1184 eui
[7] = *(u8
*)dev
->dev_addr
;
1186 case ARPHRD_INFINIBAND
:
1187 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1189 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1196 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1199 struct inet6_ifaddr
*ifp
;
1201 read_lock_bh(&idev
->lock
);
1202 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1203 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1204 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1209 read_unlock_bh(&idev
->lock
);
1213 #ifdef CONFIG_IPV6_PRIVACY
1214 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1215 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1217 struct net_device
*dev
;
1218 struct scatterlist sg
[2];
1220 sg
[0].page
= virt_to_page(idev
->entropy
);
1221 sg
[0].offset
= offset_in_page(idev
->entropy
);
1223 sg
[1].page
= virt_to_page(idev
->work_eui64
);
1224 sg
[1].offset
= offset_in_page(idev
->work_eui64
);
1229 if (ipv6_generate_eui64(idev
->work_eui64
, dev
)) {
1231 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1233 get_random_bytes(idev
->work_eui64
, sizeof(idev
->work_eui64
));
1236 spin_lock(&md5_tfm_lock
);
1237 if (unlikely(md5_tfm
== NULL
)) {
1238 spin_unlock(&md5_tfm_lock
);
1241 crypto_digest_init(md5_tfm
);
1242 crypto_digest_update(md5_tfm
, sg
, 2);
1243 crypto_digest_final(md5_tfm
, idev
->work_digest
);
1244 spin_unlock(&md5_tfm_lock
);
1246 memcpy(idev
->rndid
, &idev
->work_digest
[0], 8);
1247 idev
->rndid
[0] &= ~0x02;
1248 memcpy(idev
->entropy
, &idev
->work_digest
[8], 8);
1251 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1252 * check if generated address is not inappropriate
1254 * - Reserved subnet anycast (RFC 2526)
1255 * 11111101 11....11 1xxxxxxx
1256 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1257 * 00-00-5E-FE-xx-xx-xx-xx
1259 * - XXX: already assigned to an address on the device
1261 if (idev
->rndid
[0] == 0xfd &&
1262 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1263 (idev
->rndid
[7]&0x80))
1265 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1266 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1268 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1275 static void ipv6_regen_rndid(unsigned long data
)
1277 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1278 unsigned long expires
;
1280 read_lock_bh(&addrconf_lock
);
1281 write_lock_bh(&idev
->lock
);
1286 if (__ipv6_regen_rndid(idev
) < 0)
1290 idev
->cnf
.temp_prefered_lft
* HZ
-
1291 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1292 if (time_before(expires
, jiffies
)) {
1294 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1299 if (!mod_timer(&idev
->regen_timer
, expires
))
1303 write_unlock_bh(&idev
->lock
);
1304 read_unlock_bh(&addrconf_lock
);
1308 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1311 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1312 ret
= __ipv6_regen_rndid(idev
);
1322 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1323 unsigned long expires
, unsigned flags
)
1325 struct in6_rtmsg rtmsg
;
1327 memset(&rtmsg
, 0, sizeof(rtmsg
));
1328 ipv6_addr_copy(&rtmsg
.rtmsg_dst
, pfx
);
1329 rtmsg
.rtmsg_dst_len
= plen
;
1330 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1331 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1332 rtmsg
.rtmsg_info
= expires
;
1333 rtmsg
.rtmsg_flags
= RTF_UP
|flags
;
1334 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1336 /* Prevent useless cloning on PtP SIT.
1337 This thing is done here expecting that the whole
1338 class of non-broadcast devices need not cloning.
1340 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
&IFF_POINTOPOINT
))
1341 rtmsg
.rtmsg_flags
|= RTF_NONEXTHOP
;
1343 ip6_route_add(&rtmsg
, NULL
, NULL
);
1346 /* Create "default" multicast route to the interface */
1348 static void addrconf_add_mroute(struct net_device
*dev
)
1350 struct in6_rtmsg rtmsg
;
1352 memset(&rtmsg
, 0, sizeof(rtmsg
));
1353 ipv6_addr_set(&rtmsg
.rtmsg_dst
,
1354 htonl(0xFF000000), 0, 0, 0);
1355 rtmsg
.rtmsg_dst_len
= 8;
1356 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1357 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1358 rtmsg
.rtmsg_flags
= RTF_UP
;
1359 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1360 ip6_route_add(&rtmsg
, NULL
, NULL
);
1363 static void sit_route_add(struct net_device
*dev
)
1365 struct in6_rtmsg rtmsg
;
1367 memset(&rtmsg
, 0, sizeof(rtmsg
));
1369 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1370 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1372 /* prefix length - 96 bits "::d.d.d.d" */
1373 rtmsg
.rtmsg_dst_len
= 96;
1374 rtmsg
.rtmsg_flags
= RTF_UP
|RTF_NONEXTHOP
;
1375 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1377 ip6_route_add(&rtmsg
, NULL
, NULL
);
1380 static void addrconf_add_lroute(struct net_device
*dev
)
1382 struct in6_addr addr
;
1384 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1385 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1388 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1390 struct inet6_dev
*idev
;
1394 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1397 /* Add default multicast route */
1398 addrconf_add_mroute(dev
);
1400 /* Add link local route */
1401 addrconf_add_lroute(dev
);
1405 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1407 struct prefix_info
*pinfo
;
1411 unsigned long rt_expires
;
1412 struct inet6_dev
*in6_dev
;
1414 pinfo
= (struct prefix_info
*) opt
;
1416 if (len
< sizeof(struct prefix_info
)) {
1417 ADBG(("addrconf: prefix option too short\n"));
1422 * Validation checks ([ADDRCONF], page 19)
1425 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1427 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1430 valid_lft
= ntohl(pinfo
->valid
);
1431 prefered_lft
= ntohl(pinfo
->prefered
);
1433 if (prefered_lft
> valid_lft
) {
1434 if (net_ratelimit())
1435 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1439 in6_dev
= in6_dev_get(dev
);
1441 if (in6_dev
== NULL
) {
1442 if (net_ratelimit())
1443 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1448 * Two things going on here:
1449 * 1) Add routes for on-link prefixes
1450 * 2) Configure prefixes with the auto flag set
1453 /* Avoid arithmetic overflow. Really, we could
1454 save rt_expires in seconds, likely valid_lft,
1455 but it would require division in fib gc, that it
1458 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1461 rt_expires
= jiffies
+ valid_lft
* HZ
;
1463 if (pinfo
->onlink
) {
1464 struct rt6_info
*rt
;
1465 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1467 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1468 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1469 if (valid_lft
== 0) {
1470 ip6_del_rt(rt
, NULL
, NULL
);
1473 rt
->rt6i_expires
= rt_expires
;
1476 } else if (valid_lft
) {
1477 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1478 dev
, rt_expires
, RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1481 dst_release(&rt
->u
.dst
);
1484 /* Try to figure out our local address for this prefix */
1486 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1487 struct inet6_ifaddr
* ifp
;
1488 struct in6_addr addr
;
1489 int create
= 0, update_lft
= 0;
1491 if (pinfo
->prefix_len
== 64) {
1492 memcpy(&addr
, &pinfo
->prefix
, 8);
1493 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1494 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1495 in6_dev_put(in6_dev
);
1500 if (net_ratelimit())
1501 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1503 in6_dev_put(in6_dev
);
1508 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1510 if (ifp
== NULL
&& valid_lft
) {
1511 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1513 /* Do not allow to create too much of autoconfigured
1514 * addresses; this would be too easy way to crash kernel.
1516 if (!max_addresses
||
1517 ipv6_count_addresses(in6_dev
) < max_addresses
)
1518 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1519 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1521 if (!ifp
|| IS_ERR(ifp
)) {
1522 in6_dev_put(in6_dev
);
1526 update_lft
= create
= 1;
1527 ifp
->cstamp
= jiffies
;
1528 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1534 #ifdef CONFIG_IPV6_PRIVACY
1535 struct inet6_ifaddr
*ift
;
1539 /* update lifetime (RFC2462 5.5.3 e) */
1540 spin_lock(&ifp
->lock
);
1542 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1543 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1546 if (!update_lft
&& stored_lft
) {
1547 if (valid_lft
> MIN_VALID_LIFETIME
||
1548 valid_lft
> stored_lft
)
1550 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1551 /* valid_lft <= stored_lft is always true */
1555 valid_lft
= MIN_VALID_LIFETIME
;
1556 if (valid_lft
< prefered_lft
)
1557 prefered_lft
= valid_lft
;
1563 ifp
->valid_lft
= valid_lft
;
1564 ifp
->prefered_lft
= prefered_lft
;
1567 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1568 spin_unlock(&ifp
->lock
);
1570 if (!(flags
&IFA_F_TENTATIVE
))
1571 ipv6_ifa_notify(0, ifp
);
1573 spin_unlock(&ifp
->lock
);
1575 #ifdef CONFIG_IPV6_PRIVACY
1576 read_lock_bh(&in6_dev
->lock
);
1577 /* update all temporary addresses in the list */
1578 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1580 * When adjusting the lifetimes of an existing
1581 * temporary address, only lower the lifetimes.
1582 * Implementations must not increase the
1583 * lifetimes of an existing temporary address
1584 * when processing a Prefix Information Option.
1586 spin_lock(&ift
->lock
);
1588 if (ift
->valid_lft
> valid_lft
&&
1589 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1590 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1591 if (ift
->prefered_lft
> prefered_lft
&&
1592 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1593 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1594 spin_unlock(&ift
->lock
);
1595 if (!(flags
&IFA_F_TENTATIVE
))
1596 ipv6_ifa_notify(0, ift
);
1599 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1601 * When a new public address is created as described in [ADDRCONF],
1602 * also create a new temporary address.
1604 read_unlock_bh(&in6_dev
->lock
);
1605 ipv6_create_tempaddr(ifp
, NULL
);
1607 read_unlock_bh(&in6_dev
->lock
);
1614 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1615 in6_dev_put(in6_dev
);
1619 * Set destination address.
1620 * Special case for SIT interfaces where we create a new "virtual"
1623 int addrconf_set_dstaddr(void __user
*arg
)
1625 struct in6_ifreq ireq
;
1626 struct net_device
*dev
;
1632 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1635 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1641 if (dev
->type
== ARPHRD_SIT
) {
1644 struct ip_tunnel_parm p
;
1646 err
= -EADDRNOTAVAIL
;
1647 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1650 memset(&p
, 0, sizeof(p
));
1651 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1655 p
.iph
.protocol
= IPPROTO_IPV6
;
1657 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1659 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1660 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1665 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1667 err
= dev_open(dev
);
1677 * Manual configuration of address on an interface
1679 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
)
1681 struct inet6_ifaddr
*ifp
;
1682 struct inet6_dev
*idev
;
1683 struct net_device
*dev
;
1688 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1691 if (!(dev
->flags
&IFF_UP
))
1694 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1697 scope
= ipv6_addr_scope(pfx
);
1699 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, IFA_F_PERMANENT
);
1701 addrconf_dad_start(ifp
, 0);
1706 return PTR_ERR(ifp
);
1709 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1711 struct inet6_ifaddr
*ifp
;
1712 struct inet6_dev
*idev
;
1713 struct net_device
*dev
;
1715 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1718 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1721 read_lock_bh(&idev
->lock
);
1722 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1723 if (ifp
->prefix_len
== plen
&&
1724 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1726 read_unlock_bh(&idev
->lock
);
1730 /* If the last address is deleted administratively,
1731 disable IPv6 on this interface.
1733 if (idev
->addr_list
== NULL
)
1734 addrconf_ifdown(idev
->dev
, 1);
1738 read_unlock_bh(&idev
->lock
);
1739 return -EADDRNOTAVAIL
;
1743 int addrconf_add_ifaddr(void __user
*arg
)
1745 struct in6_ifreq ireq
;
1748 if (!capable(CAP_NET_ADMIN
))
1751 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1755 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1760 int addrconf_del_ifaddr(void __user
*arg
)
1762 struct in6_ifreq ireq
;
1765 if (!capable(CAP_NET_ADMIN
))
1768 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1772 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1777 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1779 struct inet6_ifaddr
* ifp
;
1780 struct in6_addr addr
;
1781 struct net_device
*dev
;
1786 memset(&addr
, 0, sizeof(struct in6_addr
));
1787 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1789 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1790 addr
.s6_addr32
[0] = htonl(0xfe800000);
1793 scope
= IPV6_ADDR_COMPATv4
;
1796 if (addr
.s6_addr32
[3]) {
1797 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1799 spin_lock_bh(&ifp
->lock
);
1800 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1801 spin_unlock_bh(&ifp
->lock
);
1802 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1808 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1809 struct in_device
* in_dev
= __in_dev_get(dev
);
1810 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1811 struct in_ifaddr
* ifa
;
1815 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
1818 addr
.s6_addr32
[3] = ifa
->ifa_local
;
1820 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
1822 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
1823 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1827 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1832 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
1835 spin_lock_bh(&ifp
->lock
);
1836 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1837 spin_unlock_bh(&ifp
->lock
);
1838 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1846 static void init_loopback(struct net_device
*dev
)
1848 struct inet6_dev
*idev
;
1849 struct inet6_ifaddr
* ifp
;
1855 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
1856 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
1860 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
1862 spin_lock_bh(&ifp
->lock
);
1863 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1864 spin_unlock_bh(&ifp
->lock
);
1865 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1870 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1872 struct inet6_ifaddr
* ifp
;
1874 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
1876 addrconf_dad_start(ifp
, 0);
1881 static void addrconf_dev_config(struct net_device
*dev
)
1883 struct in6_addr addr
;
1884 struct inet6_dev
* idev
;
1888 if ((dev
->type
!= ARPHRD_ETHER
) &&
1889 (dev
->type
!= ARPHRD_FDDI
) &&
1890 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
1891 (dev
->type
!= ARPHRD_ARCNET
) &&
1892 (dev
->type
!= ARPHRD_INFINIBAND
)) {
1893 /* Alas, we support only Ethernet autoconfiguration. */
1897 idev
= addrconf_add_dev(dev
);
1901 memset(&addr
, 0, sizeof(struct in6_addr
));
1902 addr
.s6_addr32
[0] = htonl(0xFE800000);
1904 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
1905 addrconf_add_linklocal(idev
, &addr
);
1908 static void addrconf_sit_config(struct net_device
*dev
)
1910 struct inet6_dev
*idev
;
1915 * Configure the tunnel with one of our IPv4
1916 * addresses... we should configure all of
1917 * our v4 addrs in the tunnel
1920 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
1921 printk(KERN_DEBUG
"init sit: add_dev failed\n");
1925 sit_add_v4_addrs(idev
);
1927 if (dev
->flags
&IFF_POINTOPOINT
) {
1928 addrconf_add_mroute(dev
);
1929 addrconf_add_lroute(dev
);
1935 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
1937 struct in6_addr lladdr
;
1939 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
1940 addrconf_add_linklocal(idev
, &lladdr
);
1946 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
1948 struct net_device
*link_dev
;
1950 /* first try to inherit the link-local address from the link device */
1951 if (idev
->dev
->iflink
&&
1952 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
1953 if (!ipv6_inherit_linklocal(idev
, link_dev
))
1956 /* then try to inherit it from any device */
1957 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
1958 if (!ipv6_inherit_linklocal(idev
, link_dev
))
1961 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
1965 * Autoconfigure tunnel with a link-local address so routing protocols,
1966 * DHCPv6, MLD etc. can be run over the virtual link
1969 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
1971 struct inet6_dev
*idev
;
1975 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
1976 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
1979 ip6_tnl_add_linklocal(idev
);
1980 addrconf_add_mroute(dev
);
1983 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
1986 struct net_device
*dev
= (struct net_device
*) data
;
1987 struct inet6_dev
*idev
= __in6_dev_get(dev
);
1993 addrconf_sit_config(dev
);
1995 case ARPHRD_TUNNEL6
:
1996 addrconf_ip6_tnl_config(dev
);
1998 case ARPHRD_LOOPBACK
:
2003 addrconf_dev_config(dev
);
2007 /* If the MTU changed during the interface down, when the
2008 interface up, the changed MTU must be reflected in the
2009 idev as well as routers.
2011 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2012 rt6_mtu_change(dev
, dev
->mtu
);
2013 idev
->cnf
.mtu6
= dev
->mtu
;
2015 idev
->tstamp
= jiffies
;
2016 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2017 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2018 stop IPv6 on this interface.
2020 if (dev
->mtu
< IPV6_MIN_MTU
)
2021 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2025 case NETDEV_CHANGEMTU
:
2026 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2027 rt6_mtu_change(dev
, dev
->mtu
);
2028 idev
->cnf
.mtu6
= dev
->mtu
;
2032 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2035 case NETDEV_UNREGISTER
:
2037 * Remove all addresses from this interface.
2039 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2043 case NETDEV_CHANGENAME
:
2044 #ifdef CONFIG_SYSCTL
2046 addrconf_sysctl_unregister(&idev
->cnf
);
2047 neigh_sysctl_unregister(idev
->nd_parms
);
2048 neigh_sysctl_register(dev
, idev
->nd_parms
,
2049 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2050 &ndisc_ifinfo_sysctl_change
,
2052 addrconf_sysctl_register(idev
, &idev
->cnf
);
2062 * addrconf module should be notified of a device going up
2064 static struct notifier_block ipv6_dev_notf
= {
2065 .notifier_call
= addrconf_notify
,
2069 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2071 struct inet6_dev
*idev
;
2072 struct inet6_ifaddr
*ifa
, **bifa
;
2077 if (dev
== &loopback_dev
&& how
== 1)
2081 neigh_ifdown(&nd_tbl
, dev
);
2083 idev
= __in6_dev_get(dev
);
2087 /* Step 1: remove reference to ipv6 device from parent device.
2091 write_lock_bh(&addrconf_lock
);
2092 dev
->ip6_ptr
= NULL
;
2094 write_unlock_bh(&addrconf_lock
);
2096 /* Step 1.5: remove snmp6 entry */
2097 snmp6_unregister_dev(idev
);
2101 /* Step 2: clear hash table */
2102 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2103 bifa
= &inet6_addr_lst
[i
];
2105 write_lock_bh(&addrconf_hash_lock
);
2106 while ((ifa
= *bifa
) != NULL
) {
2107 if (ifa
->idev
== idev
) {
2108 *bifa
= ifa
->lst_next
;
2109 ifa
->lst_next
= NULL
;
2110 addrconf_del_timer(ifa
);
2114 bifa
= &ifa
->lst_next
;
2116 write_unlock_bh(&addrconf_hash_lock
);
2119 write_lock_bh(&idev
->lock
);
2121 /* Step 3: clear flags for stateless addrconf */
2123 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
);
2125 /* Step 4: clear address list */
2126 #ifdef CONFIG_IPV6_PRIVACY
2127 if (how
== 1 && del_timer(&idev
->regen_timer
))
2130 /* clear tempaddr list */
2131 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2132 idev
->tempaddr_list
= ifa
->tmp_next
;
2133 ifa
->tmp_next
= NULL
;
2135 write_unlock_bh(&idev
->lock
);
2136 spin_lock_bh(&ifa
->lock
);
2139 in6_ifa_put(ifa
->ifpub
);
2142 spin_unlock_bh(&ifa
->lock
);
2144 write_lock_bh(&idev
->lock
);
2147 while ((ifa
= idev
->addr_list
) != NULL
) {
2148 idev
->addr_list
= ifa
->if_next
;
2149 ifa
->if_next
= NULL
;
2151 addrconf_del_timer(ifa
);
2152 write_unlock_bh(&idev
->lock
);
2154 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2157 write_lock_bh(&idev
->lock
);
2159 write_unlock_bh(&idev
->lock
);
2161 /* Step 5: Discard multicast list */
2164 ipv6_mc_destroy_dev(idev
);
2168 /* Step 5: netlink notification of this interface */
2169 idev
->tstamp
= jiffies
;
2170 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2172 /* Shot the device (if unregistered) */
2175 #ifdef CONFIG_SYSCTL
2176 addrconf_sysctl_unregister(&idev
->cnf
);
2177 neigh_sysctl_unregister(idev
->nd_parms
);
2179 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2180 neigh_ifdown(&nd_tbl
, dev
);
2186 static void addrconf_rs_timer(unsigned long data
)
2188 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2190 if (ifp
->idev
->cnf
.forwarding
)
2193 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2195 * Announcement received after solicitation
2201 spin_lock(&ifp
->lock
);
2202 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2203 struct in6_addr all_routers
;
2205 /* The wait after the last probe can be shorter */
2206 addrconf_mod_timer(ifp
, AC_RS
,
2207 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2208 ifp
->idev
->cnf
.rtr_solicit_delay
:
2209 ifp
->idev
->cnf
.rtr_solicit_interval
);
2210 spin_unlock(&ifp
->lock
);
2212 ipv6_addr_all_routers(&all_routers
);
2214 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2216 spin_unlock(&ifp
->lock
);
2218 * Note: we do not support deprecated "all on-link"
2219 * assumption any longer.
2221 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2222 ifp
->idev
->dev
->name
);
2230 * Duplicate Address Detection
2232 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, int flags
)
2234 struct inet6_dev
*idev
= ifp
->idev
;
2235 struct net_device
*dev
= idev
->dev
;
2236 unsigned long rand_num
;
2238 addrconf_join_solict(dev
, &ifp
->addr
);
2240 if (ifp
->prefix_len
!= 128 && (ifp
->flags
&IFA_F_PERMANENT
))
2241 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
, 0,
2244 net_srandom(ifp
->addr
.s6_addr32
[3]);
2245 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2247 read_lock_bh(&idev
->lock
);
2250 spin_lock_bh(&ifp
->lock
);
2252 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2253 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2254 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2255 spin_unlock_bh(&ifp
->lock
);
2256 read_unlock_bh(&idev
->lock
);
2258 addrconf_dad_completed(ifp
);
2262 ifp
->probes
= idev
->cnf
.dad_transmits
;
2263 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2265 spin_unlock_bh(&ifp
->lock
);
2267 read_unlock_bh(&idev
->lock
);
2270 static void addrconf_dad_timer(unsigned long data
)
2272 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2273 struct inet6_dev
*idev
= ifp
->idev
;
2274 struct in6_addr unspec
;
2275 struct in6_addr mcaddr
;
2277 read_lock_bh(&idev
->lock
);
2279 read_unlock_bh(&idev
->lock
);
2282 spin_lock_bh(&ifp
->lock
);
2283 if (ifp
->probes
== 0) {
2285 * DAD was successful
2288 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2289 spin_unlock_bh(&ifp
->lock
);
2290 read_unlock_bh(&idev
->lock
);
2292 addrconf_dad_completed(ifp
);
2298 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2299 spin_unlock_bh(&ifp
->lock
);
2300 read_unlock_bh(&idev
->lock
);
2302 /* send a neighbour solicitation for our addr */
2303 memset(&unspec
, 0, sizeof(unspec
));
2304 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2305 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2310 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2312 struct net_device
* dev
= ifp
->idev
->dev
;
2315 * Configure the address for reception. Now it is valid.
2318 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2320 /* If added prefix is link local and forwarding is off,
2321 start sending router solicitations.
2324 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2325 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2326 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2327 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2328 struct in6_addr all_routers
;
2330 ipv6_addr_all_routers(&all_routers
);
2333 * If a host as already performed a random delay
2334 * [...] as part of DAD [...] there is no need
2335 * to delay again before sending the first RS
2337 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2339 spin_lock_bh(&ifp
->lock
);
2341 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2342 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2343 spin_unlock_bh(&ifp
->lock
);
2347 #ifdef CONFIG_PROC_FS
2348 struct if6_iter_state
{
2352 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2354 struct inet6_ifaddr
*ifa
= NULL
;
2355 struct if6_iter_state
*state
= seq
->private;
2357 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2358 ifa
= inet6_addr_lst
[state
->bucket
];
2365 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2367 struct if6_iter_state
*state
= seq
->private;
2369 ifa
= ifa
->lst_next
;
2371 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2372 ifa
= inet6_addr_lst
[state
->bucket
];
2378 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2380 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2383 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2385 return pos
? NULL
: ifa
;
2388 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2390 read_lock_bh(&addrconf_hash_lock
);
2391 return if6_get_idx(seq
, *pos
);
2394 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2396 struct inet6_ifaddr
*ifa
;
2398 ifa
= if6_get_next(seq
, v
);
2403 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2405 read_unlock_bh(&addrconf_hash_lock
);
2408 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2410 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2412 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2414 ifp
->idev
->dev
->ifindex
,
2418 ifp
->idev
->dev
->name
);
2422 static struct seq_operations if6_seq_ops
= {
2423 .start
= if6_seq_start
,
2424 .next
= if6_seq_next
,
2425 .show
= if6_seq_show
,
2426 .stop
= if6_seq_stop
,
2429 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2431 struct seq_file
*seq
;
2433 struct if6_iter_state
*s
= kmalloc(sizeof(*s
), GFP_KERNEL
);
2437 memset(s
, 0, sizeof(*s
));
2439 rc
= seq_open(file
, &if6_seq_ops
);
2443 seq
= file
->private_data
;
2452 static struct file_operations if6_fops
= {
2453 .owner
= THIS_MODULE
,
2454 .open
= if6_seq_open
,
2456 .llseek
= seq_lseek
,
2457 .release
= seq_release_private
,
2460 int __init
if6_proc_init(void)
2462 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2467 void if6_proc_exit(void)
2469 proc_net_remove("if_inet6");
2471 #endif /* CONFIG_PROC_FS */
2474 * Periodic address status verification
2477 static void addrconf_verify(unsigned long foo
)
2479 struct inet6_ifaddr
*ifp
;
2480 unsigned long now
, next
;
2483 spin_lock_bh(&addrconf_verify_lock
);
2485 next
= now
+ ADDR_CHECK_FREQUENCY
;
2487 del_timer(&addr_chk_timer
);
2489 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2492 write_lock(&addrconf_hash_lock
);
2493 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2495 #ifdef CONFIG_IPV6_PRIVACY
2496 unsigned long regen_advance
;
2499 if (ifp
->flags
& IFA_F_PERMANENT
)
2502 spin_lock(&ifp
->lock
);
2503 age
= (now
- ifp
->tstamp
) / HZ
;
2505 #ifdef CONFIG_IPV6_PRIVACY
2506 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2507 ifp
->idev
->cnf
.dad_transmits
*
2508 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2511 if (age
>= ifp
->valid_lft
) {
2512 spin_unlock(&ifp
->lock
);
2514 write_unlock(&addrconf_hash_lock
);
2517 } else if (age
>= ifp
->prefered_lft
) {
2518 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2521 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2523 ifp
->flags
|= IFA_F_DEPRECATED
;
2526 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2527 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2529 spin_unlock(&ifp
->lock
);
2533 write_unlock(&addrconf_hash_lock
);
2535 ipv6_ifa_notify(0, ifp
);
2539 #ifdef CONFIG_IPV6_PRIVACY
2540 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2541 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2542 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2543 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2544 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2545 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2546 if (!ifp
->regen_count
&& ifpub
) {
2549 in6_ifa_hold(ifpub
);
2550 spin_unlock(&ifp
->lock
);
2551 write_unlock(&addrconf_hash_lock
);
2552 ipv6_create_tempaddr(ifpub
, ifp
);
2557 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2558 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2559 spin_unlock(&ifp
->lock
);
2562 /* ifp->prefered_lft <= ifp->valid_lft */
2563 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2564 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2565 spin_unlock(&ifp
->lock
);
2568 write_unlock(&addrconf_hash_lock
);
2571 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2572 add_timer(&addr_chk_timer
);
2573 spin_unlock_bh(&addrconf_verify_lock
);
2577 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2579 struct rtattr
**rta
= arg
;
2580 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2581 struct in6_addr
*pfx
;
2584 if (rta
[IFA_ADDRESS
-1]) {
2585 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2587 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2589 if (rta
[IFA_LOCAL
-1]) {
2590 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2592 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2597 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2601 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2603 struct rtattr
**rta
= arg
;
2604 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2605 struct in6_addr
*pfx
;
2608 if (rta
[IFA_ADDRESS
-1]) {
2609 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2611 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2613 if (rta
[IFA_LOCAL
-1]) {
2614 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2616 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2621 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2624 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
2625 u32 pid
, u32 seq
, int event
)
2627 struct ifaddrmsg
*ifm
;
2628 struct nlmsghdr
*nlh
;
2629 struct ifa_cacheinfo ci
;
2630 unsigned char *b
= skb
->tail
;
2632 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(*ifm
));
2633 if (pid
) nlh
->nlmsg_flags
|= NLM_F_MULTI
;
2634 ifm
= NLMSG_DATA(nlh
);
2635 ifm
->ifa_family
= AF_INET6
;
2636 ifm
->ifa_prefixlen
= ifa
->prefix_len
;
2637 ifm
->ifa_flags
= ifa
->flags
;
2638 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2639 if (ifa
->scope
&IFA_HOST
)
2640 ifm
->ifa_scope
= RT_SCOPE_HOST
;
2641 else if (ifa
->scope
&IFA_LINK
)
2642 ifm
->ifa_scope
= RT_SCOPE_LINK
;
2643 else if (ifa
->scope
&IFA_SITE
)
2644 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2645 ifm
->ifa_index
= ifa
->idev
->dev
->ifindex
;
2646 RTA_PUT(skb
, IFA_ADDRESS
, 16, &ifa
->addr
);
2647 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
2648 ci
.ifa_prefered
= ifa
->prefered_lft
;
2649 ci
.ifa_valid
= ifa
->valid_lft
;
2650 if (ci
.ifa_prefered
!= INFINITY_LIFE_TIME
) {
2651 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
2652 ci
.ifa_prefered
-= tval
;
2653 if (ci
.ifa_valid
!= INFINITY_LIFE_TIME
)
2654 ci
.ifa_valid
-= tval
;
2657 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2658 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2660 ci
.cstamp
= (__u32
)(TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) / HZ
* 100
2661 + TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2662 ci
.tstamp
= (__u32
)(TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2663 + TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2664 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2665 nlh
->nlmsg_len
= skb
->tail
- b
;
2670 skb_trim(skb
, b
- skb
->data
);
2674 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
2675 u32 pid
, u32 seq
, int event
)
2677 struct ifaddrmsg
*ifm
;
2678 struct nlmsghdr
*nlh
;
2679 struct ifa_cacheinfo ci
;
2680 unsigned char *b
= skb
->tail
;
2682 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(*ifm
));
2683 if (pid
) nlh
->nlmsg_flags
|= NLM_F_MULTI
;
2684 ifm
= NLMSG_DATA(nlh
);
2685 ifm
->ifa_family
= AF_INET6
;
2686 ifm
->ifa_prefixlen
= 128;
2687 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2688 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2689 if (ipv6_addr_scope(&ifmca
->mca_addr
)&IFA_SITE
)
2690 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2691 ifm
->ifa_index
= ifmca
->idev
->dev
->ifindex
;
2692 RTA_PUT(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
);
2693 ci
.cstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) / HZ
2694 * 100 + TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) % HZ
2696 ci
.tstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) / HZ
2697 * 100 + TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) % HZ
2699 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2700 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2701 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2702 nlh
->nlmsg_len
= skb
->tail
- b
;
2707 skb_trim(skb
, b
- skb
->data
);
2711 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
2712 u32 pid
, u32 seq
, int event
)
2714 struct ifaddrmsg
*ifm
;
2715 struct nlmsghdr
*nlh
;
2716 struct ifa_cacheinfo ci
;
2717 unsigned char *b
= skb
->tail
;
2719 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(*ifm
));
2720 if (pid
) nlh
->nlmsg_flags
|= NLM_F_MULTI
;
2721 ifm
= NLMSG_DATA(nlh
);
2722 ifm
->ifa_family
= AF_INET6
;
2723 ifm
->ifa_prefixlen
= 128;
2724 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2725 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2726 if (ipv6_addr_scope(&ifaca
->aca_addr
)&IFA_SITE
)
2727 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2728 ifm
->ifa_index
= ifaca
->aca_idev
->dev
->ifindex
;
2729 RTA_PUT(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
);
2730 ci
.cstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) / HZ
2731 * 100 + TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) % HZ
2733 ci
.tstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) / HZ
2734 * 100 + TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) % HZ
2736 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2737 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2738 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2739 nlh
->nlmsg_len
= skb
->tail
- b
;
2744 skb_trim(skb
, b
- skb
->data
);
2755 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
2756 enum addr_type_t type
)
2759 int s_idx
, s_ip_idx
;
2761 struct net_device
*dev
;
2762 struct inet6_dev
*idev
= NULL
;
2763 struct inet6_ifaddr
*ifa
;
2764 struct ifmcaddr6
*ifmca
;
2765 struct ifacaddr6
*ifaca
;
2767 s_idx
= cb
->args
[0];
2768 s_ip_idx
= ip_idx
= cb
->args
[1];
2769 read_lock(&dev_base_lock
);
2771 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
2777 if ((idev
= in6_dev_get(dev
)) == NULL
)
2779 read_lock_bh(&idev
->lock
);
2782 /* unicast address */
2783 for (ifa
= idev
->addr_list
; ifa
;
2784 ifa
= ifa
->if_next
, ip_idx
++) {
2785 if (ip_idx
< s_ip_idx
)
2787 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
2788 NETLINK_CB(cb
->skb
).pid
,
2789 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
)) <= 0)
2793 #ifdef CONFIG_IPV6_PRIVACY
2794 for (ifa
= idev
->tempaddr_list
; ifa
;
2795 ifa
= ifa
->tmp_next
, ip_idx
++) {
2796 if (ip_idx
< s_ip_idx
)
2798 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
2799 NETLINK_CB(cb
->skb
).pid
,
2800 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
)) <= 0)
2805 case MULTICAST_ADDR
:
2806 /* multicast address */
2807 for (ifmca
= idev
->mc_list
; ifmca
;
2808 ifmca
= ifmca
->next
, ip_idx
++) {
2809 if (ip_idx
< s_ip_idx
)
2811 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
2812 NETLINK_CB(cb
->skb
).pid
,
2813 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
)) <= 0)
2818 /* anycast address */
2819 for (ifaca
= idev
->ac_list
; ifaca
;
2820 ifaca
= ifaca
->aca_next
, ip_idx
++) {
2821 if (ip_idx
< s_ip_idx
)
2823 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
2824 NETLINK_CB(cb
->skb
).pid
,
2825 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
)) <= 0)
2832 read_unlock_bh(&idev
->lock
);
2837 read_unlock_bh(&idev
->lock
);
2840 read_unlock(&dev_base_lock
);
2842 cb
->args
[1] = ip_idx
;
2846 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2848 enum addr_type_t type
= UNICAST_ADDR
;
2849 return inet6_dump_addr(skb
, cb
, type
);
2852 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2854 enum addr_type_t type
= MULTICAST_ADDR
;
2855 return inet6_dump_addr(skb
, cb
, type
);
2859 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2861 enum addr_type_t type
= ANYCAST_ADDR
;
2862 return inet6_dump_addr(skb
, cb
, type
);
2865 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
2867 struct sk_buff
*skb
;
2868 int size
= NLMSG_SPACE(sizeof(struct ifaddrmsg
)+128);
2870 skb
= alloc_skb(size
, GFP_ATOMIC
);
2872 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFADDR
, ENOBUFS
);
2875 if (inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
) < 0) {
2877 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFADDR
, EINVAL
);
2880 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_IFADDR
;
2881 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_IFADDR
, GFP_ATOMIC
);
2884 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
2885 __s32
*array
, int bytes
)
2887 memset(array
, 0, bytes
);
2888 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
2889 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
2890 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
2891 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
2892 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
2893 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
2894 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
2895 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
2896 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
2897 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
2898 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
2899 #ifdef CONFIG_IPV6_PRIVACY
2900 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
2901 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
2902 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
2903 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
2904 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
2906 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
2909 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
2910 u32 pid
, u32 seq
, int event
)
2912 struct net_device
*dev
= idev
->dev
;
2913 __s32
*array
= NULL
;
2914 struct ifinfomsg
*r
;
2915 struct nlmsghdr
*nlh
;
2916 unsigned char *b
= skb
->tail
;
2917 struct rtattr
*subattr
;
2918 __u32 mtu
= dev
->mtu
;
2919 struct ifla_cacheinfo ci
;
2921 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(*r
));
2922 if (pid
) nlh
->nlmsg_flags
|= NLM_F_MULTI
;
2923 r
= NLMSG_DATA(nlh
);
2924 r
->ifi_family
= AF_INET6
;
2925 r
->ifi_type
= dev
->type
;
2926 r
->ifi_index
= dev
->ifindex
;
2927 r
->ifi_flags
= dev_get_flags(dev
);
2930 RTA_PUT(skb
, IFLA_IFNAME
, strlen(dev
->name
)+1, dev
->name
);
2933 RTA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
2935 RTA_PUT(skb
, IFLA_MTU
, sizeof(mtu
), &mtu
);
2936 if (dev
->ifindex
!= dev
->iflink
)
2937 RTA_PUT(skb
, IFLA_LINK
, sizeof(int), &dev
->iflink
);
2939 subattr
= (struct rtattr
*)skb
->tail
;
2941 RTA_PUT(skb
, IFLA_PROTINFO
, 0, NULL
);
2943 /* return the device flags */
2944 RTA_PUT(skb
, IFLA_INET6_FLAGS
, sizeof(__u32
), &idev
->if_flags
);
2946 /* return interface cacheinfo */
2947 ci
.max_reasm_len
= IPV6_MAXPLEN
;
2948 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2949 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2950 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
2951 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
2952 RTA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
2954 /* return the device sysctl params */
2955 if ((array
= kmalloc(DEVCONF_MAX
* sizeof(*array
), GFP_ATOMIC
)) == NULL
)
2956 goto rtattr_failure
;
2957 ipv6_store_devconf(&idev
->cnf
, array
, DEVCONF_MAX
* sizeof(*array
));
2958 RTA_PUT(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(*array
), array
);
2960 /* XXX - Statistics/MC not implemented */
2961 subattr
->rta_len
= skb
->tail
- (u8
*)subattr
;
2963 nlh
->nlmsg_len
= skb
->tail
- b
;
2971 skb_trim(skb
, b
- skb
->data
);
2975 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2978 int s_idx
= cb
->args
[0];
2979 struct net_device
*dev
;
2980 struct inet6_dev
*idev
;
2982 read_lock(&dev_base_lock
);
2983 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
2986 if ((idev
= in6_dev_get(dev
)) == NULL
)
2988 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
2989 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
);
2994 read_unlock(&dev_base_lock
);
3000 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3002 struct sk_buff
*skb
;
3004 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
)+128);
3006 skb
= alloc_skb(size
, GFP_ATOMIC
);
3008 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFINFO
, ENOBUFS
);
3011 if (inet6_fill_ifinfo(skb
, idev
, 0, 0, event
) < 0) {
3013 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFINFO
, EINVAL
);
3016 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_IFINFO
;
3017 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_IFINFO
, GFP_ATOMIC
);
3020 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3021 struct prefix_info
*pinfo
, u32 pid
, u32 seq
, int event
)
3023 struct prefixmsg
*pmsg
;
3024 struct nlmsghdr
*nlh
;
3025 unsigned char *b
= skb
->tail
;
3026 struct prefix_cacheinfo ci
;
3028 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(*pmsg
));
3031 nlh
->nlmsg_flags
|= NLM_F_MULTI
;
3033 pmsg
= NLMSG_DATA(nlh
);
3034 pmsg
->prefix_family
= AF_INET6
;
3035 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3036 pmsg
->prefix_len
= pinfo
->prefix_len
;
3037 pmsg
->prefix_type
= pinfo
->type
;
3039 pmsg
->prefix_flags
= 0;
3041 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3042 if (pinfo
->autoconf
)
3043 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3045 RTA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3047 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3048 ci
.valid_time
= ntohl(pinfo
->valid
);
3049 RTA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3051 nlh
->nlmsg_len
= skb
->tail
- b
;
3056 skb_trim(skb
, b
- skb
->data
);
3060 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3061 struct prefix_info
*pinfo
)
3063 struct sk_buff
*skb
;
3064 int size
= NLMSG_SPACE(sizeof(struct prefixmsg
)+128);
3066 skb
= alloc_skb(size
, GFP_ATOMIC
);
3068 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_PREFIX
, ENOBUFS
);
3071 if (inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
) < 0) {
3073 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_PREFIX
, EINVAL
);
3076 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_PREFIX
;
3077 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_PREFIX
, GFP_ATOMIC
);
3080 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3081 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3082 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3083 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3084 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= inet6_dump_ifaddr
, },
3085 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3086 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3087 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3088 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3089 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3090 .dumpit
= inet6_dump_fib
, },
3093 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3095 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3099 dst_hold(&ifp
->rt
->u
.dst
);
3100 if (ip6_ins_rt(ifp
->rt
, NULL
, NULL
))
3101 dst_release(&ifp
->rt
->u
.dst
);
3102 if (ifp
->idev
->cnf
.forwarding
)
3103 addrconf_join_anycast(ifp
);
3106 if (ifp
->idev
->cnf
.forwarding
)
3107 addrconf_leave_anycast(ifp
);
3108 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3109 dst_hold(&ifp
->rt
->u
.dst
);
3110 if (ip6_del_rt(ifp
->rt
, NULL
, NULL
))
3111 dst_free(&ifp
->rt
->u
.dst
);
3113 dst_release(&ifp
->rt
->u
.dst
);
3118 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3120 read_lock_bh(&addrconf_lock
);
3121 if (likely(ifp
->idev
->dead
== 0))
3122 __ipv6_ifa_notify(event
, ifp
);
3123 read_unlock_bh(&addrconf_lock
);
3126 #ifdef CONFIG_SYSCTL
3129 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3130 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3132 int *valp
= ctl
->data
;
3136 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3138 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3139 if (valp
!= &ipv6_devconf
.forwarding
) {
3140 if ((!*valp
) ^ (!val
)) {
3141 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3144 dev_forward_change(idev
);
3147 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3148 addrconf_forward_change();
3151 rt6_purge_dflt_routers();
3157 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3158 int __user
*name
, int nlen
,
3159 void __user
*oldval
,
3160 size_t __user
*oldlenp
,
3161 void __user
*newval
, size_t newlen
,
3164 int *valp
= table
->data
;
3167 if (!newval
|| !newlen
)
3169 if (newlen
!= sizeof(int))
3171 if (get_user(new, (int __user
*)newval
))
3175 if (oldval
&& oldlenp
) {
3177 if (get_user(len
, oldlenp
))
3180 if (len
> table
->maxlen
)
3181 len
= table
->maxlen
;
3182 if (copy_to_user(oldval
, valp
, len
))
3184 if (put_user(len
, oldlenp
))
3189 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3190 if (valp
!= &ipv6_devconf
.forwarding
) {
3191 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3193 if (unlikely(idev
== NULL
))
3195 changed
= (!*valp
) ^ (!new);
3198 dev_forward_change(idev
);
3201 addrconf_forward_change();
3205 rt6_purge_dflt_routers();
3212 static struct addrconf_sysctl_table
3214 struct ctl_table_header
*sysctl_header
;
3215 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3216 ctl_table addrconf_dev
[2];
3217 ctl_table addrconf_conf_dir
[2];
3218 ctl_table addrconf_proto_dir
[2];
3219 ctl_table addrconf_root_dir
[2];
3220 } addrconf_sysctl
= {
3221 .sysctl_header
= NULL
,
3224 .ctl_name
= NET_IPV6_FORWARDING
,
3225 .procname
= "forwarding",
3226 .data
= &ipv6_devconf
.forwarding
,
3227 .maxlen
= sizeof(int),
3229 .proc_handler
= &addrconf_sysctl_forward
,
3230 .strategy
= &addrconf_sysctl_forward_strategy
,
3233 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3234 .procname
= "hop_limit",
3235 .data
= &ipv6_devconf
.hop_limit
,
3236 .maxlen
= sizeof(int),
3238 .proc_handler
= proc_dointvec
,
3241 .ctl_name
= NET_IPV6_MTU
,
3243 .data
= &ipv6_devconf
.mtu6
,
3244 .maxlen
= sizeof(int),
3246 .proc_handler
= &proc_dointvec
,
3249 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3250 .procname
= "accept_ra",
3251 .data
= &ipv6_devconf
.accept_ra
,
3252 .maxlen
= sizeof(int),
3254 .proc_handler
= &proc_dointvec
,
3257 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3258 .procname
= "accept_redirects",
3259 .data
= &ipv6_devconf
.accept_redirects
,
3260 .maxlen
= sizeof(int),
3262 .proc_handler
= &proc_dointvec
,
3265 .ctl_name
= NET_IPV6_AUTOCONF
,
3266 .procname
= "autoconf",
3267 .data
= &ipv6_devconf
.autoconf
,
3268 .maxlen
= sizeof(int),
3270 .proc_handler
= &proc_dointvec
,
3273 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3274 .procname
= "dad_transmits",
3275 .data
= &ipv6_devconf
.dad_transmits
,
3276 .maxlen
= sizeof(int),
3278 .proc_handler
= &proc_dointvec
,
3281 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3282 .procname
= "router_solicitations",
3283 .data
= &ipv6_devconf
.rtr_solicits
,
3284 .maxlen
= sizeof(int),
3286 .proc_handler
= &proc_dointvec
,
3289 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3290 .procname
= "router_solicitation_interval",
3291 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3292 .maxlen
= sizeof(int),
3294 .proc_handler
= &proc_dointvec_jiffies
,
3295 .strategy
= &sysctl_jiffies
,
3298 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3299 .procname
= "router_solicitation_delay",
3300 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3301 .maxlen
= sizeof(int),
3303 .proc_handler
= &proc_dointvec_jiffies
,
3304 .strategy
= &sysctl_jiffies
,
3307 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3308 .procname
= "force_mld_version",
3309 .data
= &ipv6_devconf
.force_mld_version
,
3310 .maxlen
= sizeof(int),
3312 .proc_handler
= &proc_dointvec
,
3314 #ifdef CONFIG_IPV6_PRIVACY
3316 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3317 .procname
= "use_tempaddr",
3318 .data
= &ipv6_devconf
.use_tempaddr
,
3319 .maxlen
= sizeof(int),
3321 .proc_handler
= &proc_dointvec
,
3324 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3325 .procname
= "temp_valid_lft",
3326 .data
= &ipv6_devconf
.temp_valid_lft
,
3327 .maxlen
= sizeof(int),
3329 .proc_handler
= &proc_dointvec
,
3332 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3333 .procname
= "temp_prefered_lft",
3334 .data
= &ipv6_devconf
.temp_prefered_lft
,
3335 .maxlen
= sizeof(int),
3337 .proc_handler
= &proc_dointvec
,
3340 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3341 .procname
= "regen_max_retry",
3342 .data
= &ipv6_devconf
.regen_max_retry
,
3343 .maxlen
= sizeof(int),
3345 .proc_handler
= &proc_dointvec
,
3348 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3349 .procname
= "max_desync_factor",
3350 .data
= &ipv6_devconf
.max_desync_factor
,
3351 .maxlen
= sizeof(int),
3353 .proc_handler
= &proc_dointvec
,
3357 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3358 .procname
= "max_addresses",
3359 .data
= &ipv6_devconf
.max_addresses
,
3360 .maxlen
= sizeof(int),
3362 .proc_handler
= &proc_dointvec
,
3365 .ctl_name
= 0, /* sentinel */
3370 .ctl_name
= NET_PROTO_CONF_ALL
,
3373 .child
= addrconf_sysctl
.addrconf_vars
,
3376 .ctl_name
= 0, /* sentinel */
3379 .addrconf_conf_dir
= {
3381 .ctl_name
= NET_IPV6_CONF
,
3384 .child
= addrconf_sysctl
.addrconf_dev
,
3387 .ctl_name
= 0, /* sentinel */
3390 .addrconf_proto_dir
= {
3392 .ctl_name
= NET_IPV6
,
3395 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3398 .ctl_name
= 0, /* sentinel */
3401 .addrconf_root_dir
= {
3403 .ctl_name
= CTL_NET
,
3406 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3409 .ctl_name
= 0, /* sentinel */
3414 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3417 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3418 struct addrconf_sysctl_table
*t
;
3419 char *dev_name
= NULL
;
3421 t
= kmalloc(sizeof(*t
), GFP_KERNEL
);
3424 memcpy(t
, &addrconf_sysctl
, sizeof(*t
));
3425 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3426 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3427 t
->addrconf_vars
[i
].de
= NULL
;
3428 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3431 dev_name
= dev
->name
;
3432 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3434 dev_name
= "default";
3435 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3439 * Make a copy of dev_name, because '.procname' is regarded as const
3440 * by sysctl and we wouldn't want anyone to change it under our feet
3441 * (see SIOCSIFNAME).
3443 dev_name
= net_sysctl_strdup(dev_name
);
3447 t
->addrconf_dev
[0].procname
= dev_name
;
3449 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3450 t
->addrconf_dev
[0].de
= NULL
;
3451 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3452 t
->addrconf_conf_dir
[0].de
= NULL
;
3453 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3454 t
->addrconf_proto_dir
[0].de
= NULL
;
3455 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3456 t
->addrconf_root_dir
[0].de
= NULL
;
3458 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
, 0);
3459 if (t
->sysctl_header
== NULL
)
3474 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3477 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3479 unregister_sysctl_table(t
->sysctl_header
);
3480 kfree(t
->addrconf_dev
[0].procname
);
3492 int register_inet6addr_notifier(struct notifier_block
*nb
)
3494 return notifier_chain_register(&inet6addr_chain
, nb
);
3497 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
3499 return notifier_chain_unregister(&inet6addr_chain
,nb
);
3503 * Init / cleanup code
3506 int __init
addrconf_init(void)
3510 /* The addrconf netdev notifier requires that loopback_dev
3511 * has it's ipv6 private information allocated and setup
3512 * before it can bring up and give link-local addresses
3513 * to other devices which are up.
3515 * Unfortunately, loopback_dev is not necessarily the first
3516 * entry in the global dev_base list of net devices. In fact,
3517 * it is likely to be the very last entry on that list.
3518 * So this causes the notifier registry below to try and
3519 * give link-local addresses to all devices besides loopback_dev
3520 * first, then loopback_dev, which cases all the non-loopback_dev
3521 * devices to fail to get a link-local address.
3523 * So, as a temporary fix, allocate the ipv6 structure for
3524 * loopback_dev first by hand.
3525 * Longer term, all of the dependencies ipv6 has upon the loopback
3526 * device and it being up should be removed.
3529 if (!ipv6_add_dev(&loopback_dev
))
3535 register_netdevice_notifier(&ipv6_dev_notf
);
3537 #ifdef CONFIG_IPV6_PRIVACY
3538 md5_tfm
= crypto_alloc_tfm("md5", 0);
3539 if (unlikely(md5_tfm
== NULL
))
3541 "failed to load transform for md5\n");
3545 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
3546 #ifdef CONFIG_SYSCTL
3547 addrconf_sysctl
.sysctl_header
=
3548 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
, 0);
3549 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
3555 void __exit
addrconf_cleanup(void)
3557 struct net_device
*dev
;
3558 struct inet6_dev
*idev
;
3559 struct inet6_ifaddr
*ifa
;
3562 unregister_netdevice_notifier(&ipv6_dev_notf
);
3564 rtnetlink_links
[PF_INET6
] = NULL
;
3565 #ifdef CONFIG_SYSCTL
3566 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
3567 addrconf_sysctl_unregister(&ipv6_devconf
);
3576 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
3577 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3579 addrconf_ifdown(dev
, 1);
3581 addrconf_ifdown(&loopback_dev
, 2);
3587 write_lock_bh(&addrconf_hash_lock
);
3588 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3589 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
3590 struct inet6_ifaddr
*bifa
;
3593 ifa
= ifa
->lst_next
;
3594 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
3595 /* Do not free it; something is wrong.
3596 Now we can investigate it with debugger.
3600 write_unlock_bh(&addrconf_hash_lock
);
3602 del_timer(&addr_chk_timer
);
3606 #ifdef CONFIG_IPV6_PRIVACY
3607 if (likely(md5_tfm
!= NULL
)) {
3608 crypto_free_tfm(md5_tfm
);
3613 #ifdef CONFIG_PROC_FS
3614 proc_net_remove("if_inet6");