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>
60 #include <linux/string.h>
66 #include <net/protocol.h>
67 #include <net/ndisc.h>
68 #include <net/ip6_route.h>
69 #include <net/addrconf.h>
72 #include <linux/if_tunnel.h>
73 #include <linux/rtnetlink.h>
75 #ifdef CONFIG_IPV6_PRIVACY
76 #include <linux/random.h>
77 #include <linux/crypto.h>
78 #include <asm/scatterlist.h>
81 #include <asm/uaccess.h>
83 #include <linux/proc_fs.h>
84 #include <linux/seq_file.h>
86 /* Set to 3 to get tracing... */
90 #define ADBG(x) printk x
95 #define INFINITY_LIFE_TIME 0xFFFFFFFF
96 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
99 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
100 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
103 #ifdef CONFIG_IPV6_PRIVACY
104 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
105 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
106 static void ipv6_regen_rndid(unsigned long data
);
108 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
109 static struct crypto_tfm
*md5_tfm
;
110 static DEFINE_SPINLOCK(md5_tfm_lock
);
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 /* Protects inet6 devices */
122 DEFINE_RWLOCK(addrconf_lock
);
124 static void addrconf_verify(unsigned long);
126 static struct timer_list addr_chk_timer
=
127 TIMER_INITIALIZER(addrconf_verify
, 0, 0);
128 static DEFINE_SPINLOCK(addrconf_verify_lock
);
130 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
131 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
133 static int addrconf_ifdown(struct net_device
*dev
, int how
);
135 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
136 static void addrconf_dad_timer(unsigned long data
);
137 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
138 static void addrconf_rs_timer(unsigned long data
);
139 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
140 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
142 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
143 struct prefix_info
*pinfo
);
144 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
146 static struct notifier_block
*inet6addr_chain
;
148 struct ipv6_devconf ipv6_devconf
= {
150 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
151 .mtu6
= IPV6_MIN_MTU
,
153 .accept_redirects
= 1,
155 .force_mld_version
= 0,
157 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
158 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
159 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
160 #ifdef CONFIG_IPV6_PRIVACY
162 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
163 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
164 .regen_max_retry
= REGEN_MAX_RETRY
,
165 .max_desync_factor
= MAX_DESYNC_FACTOR
,
167 .max_addresses
= IPV6_MAX_ADDRESSES
,
170 static struct ipv6_devconf ipv6_devconf_dflt
= {
172 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
173 .mtu6
= IPV6_MIN_MTU
,
175 .accept_redirects
= 1,
178 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
179 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
180 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
181 #ifdef CONFIG_IPV6_PRIVACY
183 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
184 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
185 .regen_max_retry
= REGEN_MAX_RETRY
,
186 .max_desync_factor
= MAX_DESYNC_FACTOR
,
188 .max_addresses
= IPV6_MAX_ADDRESSES
,
191 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
193 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
195 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
197 int ipv6_addr_type(const struct in6_addr
*addr
)
202 st
= addr
->s6_addr32
[0];
204 if ((st
& htonl(0xFF000000)) == htonl(0xFF000000)) {
205 type
= IPV6_ADDR_MULTICAST
;
207 switch((st
& htonl(0x00FF0000))) {
208 case __constant_htonl(0x00010000):
209 type
|= IPV6_ADDR_LOOPBACK
;
212 case __constant_htonl(0x00020000):
213 type
|= IPV6_ADDR_LINKLOCAL
;
216 case __constant_htonl(0x00050000):
217 type
|= IPV6_ADDR_SITELOCAL
;
223 type
= IPV6_ADDR_UNICAST
;
225 /* Consider all addresses with the first three bits different of
226 000 and 111 as finished.
228 if ((st
& htonl(0xE0000000)) != htonl(0x00000000) &&
229 (st
& htonl(0xE0000000)) != htonl(0xE0000000))
232 if ((st
& htonl(0xFFC00000)) == htonl(0xFE800000))
233 return (IPV6_ADDR_LINKLOCAL
| type
);
235 if ((st
& htonl(0xFFC00000)) == htonl(0xFEC00000))
236 return (IPV6_ADDR_SITELOCAL
| type
);
238 if ((addr
->s6_addr32
[0] | addr
->s6_addr32
[1]) == 0) {
239 if (addr
->s6_addr32
[2] == 0) {
240 if (addr
->s6_addr32
[3] == 0)
241 return IPV6_ADDR_ANY
;
243 if (addr
->s6_addr32
[3] == htonl(0x00000001))
244 return (IPV6_ADDR_LOOPBACK
| type
);
246 return (IPV6_ADDR_COMPATv4
| type
);
249 if (addr
->s6_addr32
[2] == htonl(0x0000ffff))
250 return IPV6_ADDR_MAPPED
;
253 st
&= htonl(0xFF000000);
255 return IPV6_ADDR_RESERVED
;
256 st
&= htonl(0xFE000000);
257 if (st
== htonl(0x02000000))
258 return IPV6_ADDR_RESERVED
; /* for NSAP */
259 if (st
== htonl(0x04000000))
260 return IPV6_ADDR_RESERVED
; /* for IPX */
264 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
266 if (del_timer(&ifp
->timer
))
270 enum addrconf_timer_t
277 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
278 enum addrconf_timer_t what
,
281 if (!del_timer(&ifp
->timer
))
286 ifp
->timer
.function
= addrconf_dad_timer
;
289 ifp
->timer
.function
= addrconf_rs_timer
;
293 ifp
->timer
.expires
= jiffies
+ when
;
294 add_timer(&ifp
->timer
);
297 /* Nobody refers to this device, we may destroy it. */
299 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
301 struct net_device
*dev
= idev
->dev
;
302 BUG_TRAP(idev
->addr_list
==NULL
);
303 BUG_TRAP(idev
->mc_list
==NULL
);
304 #ifdef NET_REFCNT_DEBUG
305 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
309 printk("Freeing alive inet6 device %p\n", idev
);
312 snmp6_free_dev(idev
);
316 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
318 struct inet6_dev
*ndev
;
322 if (dev
->mtu
< IPV6_MIN_MTU
)
325 ndev
= kmalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
328 memset(ndev
, 0, sizeof(struct inet6_dev
));
330 rwlock_init(&ndev
->lock
);
332 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
333 ndev
->cnf
.mtu6
= dev
->mtu
;
334 ndev
->cnf
.sysctl
= NULL
;
335 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
336 if (ndev
->nd_parms
== NULL
) {
340 /* We refer to the device */
343 if (snmp6_alloc_dev(ndev
) < 0) {
345 "%s(): cannot allocate memory for statistics; dev=%s.\n",
346 __FUNCTION__
, dev
->name
));
347 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
349 in6_dev_finish_destroy(ndev
);
353 if (snmp6_register_dev(ndev
) < 0) {
355 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
356 __FUNCTION__
, dev
->name
));
357 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
359 in6_dev_finish_destroy(ndev
);
363 /* One reference from device. We must do this before
364 * we invoke __ipv6_regen_rndid().
368 #ifdef CONFIG_IPV6_PRIVACY
369 get_random_bytes(ndev
->rndid
, sizeof(ndev
->rndid
));
370 get_random_bytes(ndev
->entropy
, sizeof(ndev
->entropy
));
371 init_timer(&ndev
->regen_timer
);
372 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
373 ndev
->regen_timer
.data
= (unsigned long) ndev
;
374 if ((dev
->flags
&IFF_LOOPBACK
) ||
375 dev
->type
== ARPHRD_TUNNEL
||
376 dev
->type
== ARPHRD_NONE
||
377 dev
->type
== ARPHRD_SIT
) {
379 "Disabled Privacy Extensions on device %p(%s)\n",
381 ndev
->cnf
.use_tempaddr
= -1;
384 ipv6_regen_rndid((unsigned long) ndev
);
388 write_lock_bh(&addrconf_lock
);
390 write_unlock_bh(&addrconf_lock
);
392 ipv6_mc_init_dev(ndev
);
393 ndev
->tstamp
= jiffies
;
395 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
396 NET_IPV6_NEIGH
, "ipv6",
397 &ndisc_ifinfo_sysctl_change
,
399 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
405 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
407 struct inet6_dev
*idev
;
411 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
412 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
415 if (dev
->flags
&IFF_UP
)
421 static void dev_forward_change(struct inet6_dev
*idev
)
423 struct net_device
*dev
;
424 struct inet6_ifaddr
*ifa
;
425 struct in6_addr addr
;
430 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
431 ipv6_addr_all_routers(&addr
);
433 if (idev
->cnf
.forwarding
)
434 ipv6_dev_mc_inc(dev
, &addr
);
436 ipv6_dev_mc_dec(dev
, &addr
);
438 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
439 if (idev
->cnf
.forwarding
)
440 addrconf_join_anycast(ifa
);
442 addrconf_leave_anycast(ifa
);
447 static void addrconf_forward_change(void)
449 struct net_device
*dev
;
450 struct inet6_dev
*idev
;
452 read_lock(&dev_base_lock
);
453 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
454 read_lock(&addrconf_lock
);
455 idev
= __in6_dev_get(dev
);
457 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
458 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
460 dev_forward_change(idev
);
462 read_unlock(&addrconf_lock
);
464 read_unlock(&dev_base_lock
);
468 /* Nobody refers to this ifaddr, destroy it */
470 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
472 BUG_TRAP(ifp
->if_next
==NULL
);
473 BUG_TRAP(ifp
->lst_next
==NULL
);
474 #ifdef NET_REFCNT_DEBUG
475 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
478 in6_dev_put(ifp
->idev
);
480 if (del_timer(&ifp
->timer
))
481 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
484 printk("Freeing alive inet6 address %p\n", ifp
);
487 dst_release(&ifp
->rt
->u
.dst
);
492 /* On success it returns ifp with increased reference count */
494 static struct inet6_ifaddr
*
495 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
496 int scope
, u32 flags
)
498 struct inet6_ifaddr
*ifa
= NULL
;
503 read_lock_bh(&addrconf_lock
);
505 err
= -ENODEV
; /*XXX*/
509 write_lock(&addrconf_hash_lock
);
511 /* Ignore adding duplicate addresses on an interface */
512 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
513 ADBG(("ipv6_add_addr: already assigned\n"));
518 ifa
= kmalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
521 ADBG(("ipv6_add_addr: malloc failed\n"));
526 rt
= addrconf_dst_alloc(idev
, addr
, 0);
532 memset(ifa
, 0, sizeof(struct inet6_ifaddr
));
533 ipv6_addr_copy(&ifa
->addr
, addr
);
535 spin_lock_init(&ifa
->lock
);
536 init_timer(&ifa
->timer
);
537 ifa
->timer
.data
= (unsigned long) ifa
;
539 ifa
->prefix_len
= pfxlen
;
540 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
541 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
548 /* Add to big hash table */
549 hash
= ipv6_addr_hash(addr
);
551 ifa
->lst_next
= inet6_addr_lst
[hash
];
552 inet6_addr_lst
[hash
] = ifa
;
554 write_unlock(&addrconf_hash_lock
);
556 write_lock(&idev
->lock
);
557 /* Add to inet6_dev unicast addr list. */
558 ifa
->if_next
= idev
->addr_list
;
559 idev
->addr_list
= ifa
;
561 #ifdef CONFIG_IPV6_PRIVACY
562 if (ifa
->flags
&IFA_F_TEMPORARY
) {
563 ifa
->tmp_next
= idev
->tempaddr_list
;
564 idev
->tempaddr_list
= ifa
;
572 write_unlock(&idev
->lock
);
574 read_unlock_bh(&addrconf_lock
);
576 if (likely(err
== 0))
577 notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
585 write_unlock(&addrconf_hash_lock
);
589 /* This function wants to get referenced ifp and releases it before return */
591 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
593 struct inet6_ifaddr
*ifa
, **ifap
;
594 struct inet6_dev
*idev
= ifp
->idev
;
596 int deleted
= 0, onlink
= 0;
597 unsigned long expires
= jiffies
;
599 hash
= ipv6_addr_hash(&ifp
->addr
);
603 write_lock_bh(&addrconf_hash_lock
);
604 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
605 ifap
= &ifa
->lst_next
) {
607 *ifap
= ifa
->lst_next
;
609 ifa
->lst_next
= NULL
;
613 write_unlock_bh(&addrconf_hash_lock
);
615 write_lock_bh(&idev
->lock
);
616 #ifdef CONFIG_IPV6_PRIVACY
617 if (ifp
->flags
&IFA_F_TEMPORARY
) {
618 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
619 ifap
= &ifa
->tmp_next
) {
621 *ifap
= ifa
->tmp_next
;
623 in6_ifa_put(ifp
->ifpub
);
627 ifa
->tmp_next
= NULL
;
634 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;
635 ifap
= &ifa
->if_next
) {
637 *ifap
= ifa
->if_next
;
640 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
643 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
644 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
646 if (ifa
->flags
& IFA_F_PERMANENT
) {
651 unsigned long lifetime
;
656 spin_lock(&ifa
->lock
);
657 lifetime
= min_t(unsigned long,
658 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
659 if (time_before(expires
,
660 ifa
->tstamp
+ lifetime
* HZ
))
661 expires
= ifa
->tstamp
+ lifetime
* HZ
;
662 spin_unlock(&ifa
->lock
);
667 write_unlock_bh(&idev
->lock
);
669 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
671 notifier_call_chain(&inet6addr_chain
,NETDEV_DOWN
,ifp
);
673 addrconf_del_timer(ifp
);
676 * Purge or update corresponding prefix
678 * 1) we don't purge prefix here if address was not permanent.
679 * prefix is managed by its own lifetime.
680 * 2) if there're no addresses, delete prefix.
681 * 3) if there're still other permanent address(es),
682 * corresponding prefix is still permanent.
683 * 4) otherwise, update prefix lifetime to the
684 * longest valid lifetime among the corresponding
685 * addresses on the device.
686 * Note: subsequent RA will update lifetime.
690 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
691 struct in6_addr prefix
;
694 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
695 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
697 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
699 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
701 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
702 rt
->rt6i_expires
= expires
;
703 rt
->rt6i_flags
|= RTF_EXPIRES
;
706 dst_release(&rt
->u
.dst
);
712 #ifdef CONFIG_IPV6_PRIVACY
713 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
715 struct inet6_dev
*idev
= ifp
->idev
;
716 struct in6_addr addr
, *tmpaddr
;
717 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
722 write_lock(&idev
->lock
);
724 spin_lock_bh(&ift
->lock
);
725 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
726 spin_unlock_bh(&ift
->lock
);
733 if (idev
->cnf
.use_tempaddr
<= 0) {
734 write_unlock(&idev
->lock
);
736 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
741 spin_lock_bh(&ifp
->lock
);
742 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
743 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
744 spin_unlock_bh(&ifp
->lock
);
745 write_unlock(&idev
->lock
);
747 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
753 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
754 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
755 spin_unlock_bh(&ifp
->lock
);
756 write_unlock(&idev
->lock
);
758 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
764 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
765 tmp_valid_lft
= min_t(__u32
,
767 idev
->cnf
.temp_valid_lft
);
768 tmp_prefered_lft
= min_t(__u32
,
770 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
771 tmp_plen
= ifp
->prefix_len
;
772 max_addresses
= idev
->cnf
.max_addresses
;
773 tmp_cstamp
= ifp
->cstamp
;
774 tmp_tstamp
= ifp
->tstamp
;
775 spin_unlock_bh(&ifp
->lock
);
777 write_unlock(&idev
->lock
);
778 ift
= !max_addresses
||
779 ipv6_count_addresses(idev
) < max_addresses
?
780 ipv6_add_addr(idev
, &addr
, tmp_plen
,
781 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
782 if (!ift
|| IS_ERR(ift
)) {
786 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
788 write_lock(&idev
->lock
);
792 spin_lock_bh(&ift
->lock
);
794 ift
->valid_lft
= tmp_valid_lft
;
795 ift
->prefered_lft
= tmp_prefered_lft
;
796 ift
->cstamp
= tmp_cstamp
;
797 ift
->tstamp
= tmp_tstamp
;
798 spin_unlock_bh(&ift
->lock
);
800 addrconf_dad_start(ift
, 0);
809 * Choose an appropriate source address
811 * i) get an address with an appropriate scope
812 * ii) see if there is a specific route for the destination and use
813 * an address of the attached interface
814 * iii) don't use deprecated addresses
816 static int inline ipv6_saddr_pref(const struct inet6_ifaddr
*ifp
, u8 invpref
)
819 pref
= ifp
->flags
&IFA_F_DEPRECATED
? 0 : 2;
820 #ifdef CONFIG_IPV6_PRIVACY
821 pref
|= (ifp
->flags
^invpref
)&IFA_F_TEMPORARY
? 0 : 1;
826 #ifdef CONFIG_IPV6_PRIVACY
827 #define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3)
829 #define IPV6_GET_SADDR_MAXSCORE(score) (score)
832 int ipv6_dev_get_saddr(struct net_device
*dev
,
833 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
835 struct inet6_ifaddr
*ifp
= NULL
;
836 struct inet6_ifaddr
*match
= NULL
;
837 struct inet6_dev
*idev
;
840 int hiscore
= -1, score
;
842 scope
= ipv6_addr_scope(daddr
);
846 * search dev and walk through dev addresses
850 if (dev
->flags
& IFF_LOOPBACK
)
853 read_lock(&addrconf_lock
);
854 idev
= __in6_dev_get(dev
);
856 read_lock_bh(&idev
->lock
);
857 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
858 if (ifp
->scope
== scope
) {
859 if (ifp
->flags
&IFA_F_TENTATIVE
)
861 #ifdef CONFIG_IPV6_PRIVACY
862 score
= ipv6_saddr_pref(ifp
, idev
->cnf
.use_tempaddr
> 1 ? IFA_F_TEMPORARY
: 0);
864 score
= ipv6_saddr_pref(ifp
, 0);
866 if (score
<= hiscore
)
875 if (IPV6_GET_SADDR_MAXSCORE(score
)) {
876 read_unlock_bh(&idev
->lock
);
877 read_unlock(&addrconf_lock
);
882 read_unlock_bh(&idev
->lock
);
884 read_unlock(&addrconf_lock
);
887 if (scope
== IFA_LINK
)
891 * dev == NULL or search failed for specified dev
894 read_lock(&dev_base_lock
);
895 read_lock(&addrconf_lock
);
896 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
897 idev
= __in6_dev_get(dev
);
899 read_lock_bh(&idev
->lock
);
900 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
901 if (ifp
->scope
== scope
) {
902 if (ifp
->flags
&IFA_F_TENTATIVE
)
904 #ifdef CONFIG_IPV6_PRIVACY
905 score
= ipv6_saddr_pref(ifp
, idev
->cnf
.use_tempaddr
> 1 ? IFA_F_TEMPORARY
: 0);
907 score
= ipv6_saddr_pref(ifp
, 0);
909 if (score
<= hiscore
)
918 if (IPV6_GET_SADDR_MAXSCORE(score
)) {
919 read_unlock_bh(&idev
->lock
);
920 goto out_unlock_base
;
924 read_unlock_bh(&idev
->lock
);
929 read_unlock(&addrconf_lock
);
930 read_unlock(&dev_base_lock
);
933 err
= -EADDRNOTAVAIL
;
935 ipv6_addr_copy(saddr
, &match
->addr
);
944 int ipv6_get_saddr(struct dst_entry
*dst
,
945 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
947 return ipv6_dev_get_saddr(dst
? ((struct rt6_info
*)dst
)->rt6i_idev
->dev
: NULL
, daddr
, saddr
);
951 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
953 struct inet6_dev
*idev
;
954 int err
= -EADDRNOTAVAIL
;
956 read_lock(&addrconf_lock
);
957 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
958 struct inet6_ifaddr
*ifp
;
960 read_lock_bh(&idev
->lock
);
961 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
962 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
963 ipv6_addr_copy(addr
, &ifp
->addr
);
968 read_unlock_bh(&idev
->lock
);
970 read_unlock(&addrconf_lock
);
974 static int ipv6_count_addresses(struct inet6_dev
*idev
)
977 struct inet6_ifaddr
*ifp
;
979 read_lock_bh(&idev
->lock
);
980 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
982 read_unlock_bh(&idev
->lock
);
986 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
988 struct inet6_ifaddr
* ifp
;
989 u8 hash
= ipv6_addr_hash(addr
);
991 read_lock_bh(&addrconf_hash_lock
);
992 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
993 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
994 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
995 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
996 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1000 read_unlock_bh(&addrconf_hash_lock
);
1005 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1007 struct inet6_ifaddr
* ifp
;
1008 u8 hash
= ipv6_addr_hash(addr
);
1010 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1011 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1012 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1019 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1021 struct inet6_ifaddr
* ifp
;
1022 u8 hash
= ipv6_addr_hash(addr
);
1024 read_lock_bh(&addrconf_hash_lock
);
1025 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1026 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1027 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1028 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1034 read_unlock_bh(&addrconf_hash_lock
);
1039 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1041 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1042 const struct in6_addr
*sk2_rcv_saddr6
= tcp_v6_rcv_saddr(sk2
);
1043 u32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1044 u32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1045 int sk_ipv6only
= ipv6_only_sock(sk
);
1046 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1047 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1048 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1050 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1053 if (addr_type2
== IPV6_ADDR_ANY
&&
1054 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1057 if (addr_type
== IPV6_ADDR_ANY
&&
1058 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1061 if (sk2_rcv_saddr6
&&
1062 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1065 if (addr_type
== IPV6_ADDR_MAPPED
&&
1067 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1073 /* Gets referenced address, destroys ifaddr */
1075 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1077 if (net_ratelimit())
1078 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1079 if (ifp
->flags
&IFA_F_PERMANENT
) {
1080 spin_lock_bh(&ifp
->lock
);
1081 addrconf_del_timer(ifp
);
1082 ifp
->flags
|= IFA_F_TENTATIVE
;
1083 spin_unlock_bh(&ifp
->lock
);
1085 #ifdef CONFIG_IPV6_PRIVACY
1086 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1087 struct inet6_ifaddr
*ifpub
;
1088 spin_lock_bh(&ifp
->lock
);
1091 in6_ifa_hold(ifpub
);
1092 spin_unlock_bh(&ifp
->lock
);
1093 ipv6_create_tempaddr(ifpub
, ifp
);
1096 spin_unlock_bh(&ifp
->lock
);
1105 /* Join to solicited addr multicast group. */
1107 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1109 struct in6_addr maddr
;
1111 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1114 addrconf_addr_solict_mult(addr
, &maddr
);
1115 ipv6_dev_mc_inc(dev
, &maddr
);
1118 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1120 struct in6_addr maddr
;
1122 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1125 addrconf_addr_solict_mult(addr
, &maddr
);
1126 __ipv6_dev_mc_dec(idev
, &maddr
);
1129 void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1131 struct in6_addr addr
;
1132 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1133 if (ipv6_addr_any(&addr
))
1135 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1138 void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1140 struct in6_addr addr
;
1141 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1142 if (ipv6_addr_any(&addr
))
1144 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1147 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1149 switch (dev
->type
) {
1152 case ARPHRD_IEEE802_TR
:
1153 if (dev
->addr_len
!= ETH_ALEN
)
1155 memcpy(eui
, dev
->dev_addr
, 3);
1156 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1159 * The zSeries OSA network cards can be shared among various
1160 * OS instances, but the OSA cards have only one MAC address.
1161 * This leads to duplicate address conflicts in conjunction
1162 * with IPv6 if more than one instance uses the same card.
1164 * The driver for these cards can deliver a unique 16-bit
1165 * identifier for each instance sharing the same card. It is
1166 * placed instead of 0xFFFE in the interface identifier. The
1167 * "u" bit of the interface identifier is not inverted in this
1168 * case. Hence the resulting interface identifier has local
1169 * scope according to RFC2373.
1172 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1173 eui
[4] = dev
->dev_id
& 0xFF;
1181 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1182 if (dev
->addr_len
!= ARCNET_ALEN
)
1185 eui
[7] = *(u8
*)dev
->dev_addr
;
1187 case ARPHRD_INFINIBAND
:
1188 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1190 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1197 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1200 struct inet6_ifaddr
*ifp
;
1202 read_lock_bh(&idev
->lock
);
1203 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1204 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1205 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1210 read_unlock_bh(&idev
->lock
);
1214 #ifdef CONFIG_IPV6_PRIVACY
1215 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1216 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1218 struct net_device
*dev
;
1219 struct scatterlist sg
[2];
1221 sg
[0].page
= virt_to_page(idev
->entropy
);
1222 sg
[0].offset
= offset_in_page(idev
->entropy
);
1224 sg
[1].page
= virt_to_page(idev
->work_eui64
);
1225 sg
[1].offset
= offset_in_page(idev
->work_eui64
);
1230 if (ipv6_generate_eui64(idev
->work_eui64
, dev
)) {
1232 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1234 get_random_bytes(idev
->work_eui64
, sizeof(idev
->work_eui64
));
1237 spin_lock(&md5_tfm_lock
);
1238 if (unlikely(md5_tfm
== NULL
)) {
1239 spin_unlock(&md5_tfm_lock
);
1242 crypto_digest_init(md5_tfm
);
1243 crypto_digest_update(md5_tfm
, sg
, 2);
1244 crypto_digest_final(md5_tfm
, idev
->work_digest
);
1245 spin_unlock(&md5_tfm_lock
);
1247 memcpy(idev
->rndid
, &idev
->work_digest
[0], 8);
1248 idev
->rndid
[0] &= ~0x02;
1249 memcpy(idev
->entropy
, &idev
->work_digest
[8], 8);
1252 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1253 * check if generated address is not inappropriate
1255 * - Reserved subnet anycast (RFC 2526)
1256 * 11111101 11....11 1xxxxxxx
1257 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1258 * 00-00-5E-FE-xx-xx-xx-xx
1260 * - XXX: already assigned to an address on the device
1262 if (idev
->rndid
[0] == 0xfd &&
1263 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1264 (idev
->rndid
[7]&0x80))
1266 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1267 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1269 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1276 static void ipv6_regen_rndid(unsigned long data
)
1278 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1279 unsigned long expires
;
1281 read_lock_bh(&addrconf_lock
);
1282 write_lock_bh(&idev
->lock
);
1287 if (__ipv6_regen_rndid(idev
) < 0)
1291 idev
->cnf
.temp_prefered_lft
* HZ
-
1292 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1293 if (time_before(expires
, jiffies
)) {
1295 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1300 if (!mod_timer(&idev
->regen_timer
, expires
))
1304 write_unlock_bh(&idev
->lock
);
1305 read_unlock_bh(&addrconf_lock
);
1309 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1312 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1313 ret
= __ipv6_regen_rndid(idev
);
1323 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1324 unsigned long expires
, u32 flags
)
1326 struct in6_rtmsg rtmsg
;
1328 memset(&rtmsg
, 0, sizeof(rtmsg
));
1329 ipv6_addr_copy(&rtmsg
.rtmsg_dst
, pfx
);
1330 rtmsg
.rtmsg_dst_len
= plen
;
1331 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1332 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1333 rtmsg
.rtmsg_info
= expires
;
1334 rtmsg
.rtmsg_flags
= RTF_UP
|flags
;
1335 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1337 /* Prevent useless cloning on PtP SIT.
1338 This thing is done here expecting that the whole
1339 class of non-broadcast devices need not cloning.
1341 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
&IFF_POINTOPOINT
))
1342 rtmsg
.rtmsg_flags
|= RTF_NONEXTHOP
;
1344 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1347 /* Create "default" multicast route to the interface */
1349 static void addrconf_add_mroute(struct net_device
*dev
)
1351 struct in6_rtmsg rtmsg
;
1353 memset(&rtmsg
, 0, sizeof(rtmsg
));
1354 ipv6_addr_set(&rtmsg
.rtmsg_dst
,
1355 htonl(0xFF000000), 0, 0, 0);
1356 rtmsg
.rtmsg_dst_len
= 8;
1357 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1358 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1359 rtmsg
.rtmsg_flags
= RTF_UP
;
1360 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1361 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1364 static void sit_route_add(struct net_device
*dev
)
1366 struct in6_rtmsg rtmsg
;
1368 memset(&rtmsg
, 0, sizeof(rtmsg
));
1370 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1371 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1373 /* prefix length - 96 bits "::d.d.d.d" */
1374 rtmsg
.rtmsg_dst_len
= 96;
1375 rtmsg
.rtmsg_flags
= RTF_UP
|RTF_NONEXTHOP
;
1376 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1378 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1381 static void addrconf_add_lroute(struct net_device
*dev
)
1383 struct in6_addr addr
;
1385 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1386 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1389 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1391 struct inet6_dev
*idev
;
1395 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1398 /* Add default multicast route */
1399 addrconf_add_mroute(dev
);
1401 /* Add link local route */
1402 addrconf_add_lroute(dev
);
1406 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1408 struct prefix_info
*pinfo
;
1412 unsigned long rt_expires
;
1413 struct inet6_dev
*in6_dev
;
1415 pinfo
= (struct prefix_info
*) opt
;
1417 if (len
< sizeof(struct prefix_info
)) {
1418 ADBG(("addrconf: prefix option too short\n"));
1423 * Validation checks ([ADDRCONF], page 19)
1426 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1428 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1431 valid_lft
= ntohl(pinfo
->valid
);
1432 prefered_lft
= ntohl(pinfo
->prefered
);
1434 if (prefered_lft
> valid_lft
) {
1435 if (net_ratelimit())
1436 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1440 in6_dev
= in6_dev_get(dev
);
1442 if (in6_dev
== NULL
) {
1443 if (net_ratelimit())
1444 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1449 * Two things going on here:
1450 * 1) Add routes for on-link prefixes
1451 * 2) Configure prefixes with the auto flag set
1454 /* Avoid arithmetic overflow. Really, we could
1455 save rt_expires in seconds, likely valid_lft,
1456 but it would require division in fib gc, that it
1459 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1462 rt_expires
= jiffies
+ valid_lft
* HZ
;
1464 if (pinfo
->onlink
) {
1465 struct rt6_info
*rt
;
1466 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1468 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1469 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1470 if (valid_lft
== 0) {
1471 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
1474 rt
->rt6i_expires
= rt_expires
;
1477 } else if (valid_lft
) {
1478 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1479 dev
, rt_expires
, RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1482 dst_release(&rt
->u
.dst
);
1485 /* Try to figure out our local address for this prefix */
1487 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1488 struct inet6_ifaddr
* ifp
;
1489 struct in6_addr addr
;
1490 int create
= 0, update_lft
= 0;
1492 if (pinfo
->prefix_len
== 64) {
1493 memcpy(&addr
, &pinfo
->prefix
, 8);
1494 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1495 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1496 in6_dev_put(in6_dev
);
1501 if (net_ratelimit())
1502 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1504 in6_dev_put(in6_dev
);
1509 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1511 if (ifp
== NULL
&& valid_lft
) {
1512 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1514 /* Do not allow to create too much of autoconfigured
1515 * addresses; this would be too easy way to crash kernel.
1517 if (!max_addresses
||
1518 ipv6_count_addresses(in6_dev
) < max_addresses
)
1519 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1520 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1522 if (!ifp
|| IS_ERR(ifp
)) {
1523 in6_dev_put(in6_dev
);
1527 update_lft
= create
= 1;
1528 ifp
->cstamp
= jiffies
;
1529 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1535 #ifdef CONFIG_IPV6_PRIVACY
1536 struct inet6_ifaddr
*ift
;
1540 /* update lifetime (RFC2462 5.5.3 e) */
1541 spin_lock(&ifp
->lock
);
1543 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1544 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1547 if (!update_lft
&& stored_lft
) {
1548 if (valid_lft
> MIN_VALID_LIFETIME
||
1549 valid_lft
> stored_lft
)
1551 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1552 /* valid_lft <= stored_lft is always true */
1556 valid_lft
= MIN_VALID_LIFETIME
;
1557 if (valid_lft
< prefered_lft
)
1558 prefered_lft
= valid_lft
;
1564 ifp
->valid_lft
= valid_lft
;
1565 ifp
->prefered_lft
= prefered_lft
;
1568 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1569 spin_unlock(&ifp
->lock
);
1571 if (!(flags
&IFA_F_TENTATIVE
))
1572 ipv6_ifa_notify(0, ifp
);
1574 spin_unlock(&ifp
->lock
);
1576 #ifdef CONFIG_IPV6_PRIVACY
1577 read_lock_bh(&in6_dev
->lock
);
1578 /* update all temporary addresses in the list */
1579 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1581 * When adjusting the lifetimes of an existing
1582 * temporary address, only lower the lifetimes.
1583 * Implementations must not increase the
1584 * lifetimes of an existing temporary address
1585 * when processing a Prefix Information Option.
1587 spin_lock(&ift
->lock
);
1589 if (ift
->valid_lft
> valid_lft
&&
1590 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1591 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1592 if (ift
->prefered_lft
> prefered_lft
&&
1593 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1594 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1595 spin_unlock(&ift
->lock
);
1596 if (!(flags
&IFA_F_TENTATIVE
))
1597 ipv6_ifa_notify(0, ift
);
1600 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1602 * When a new public address is created as described in [ADDRCONF],
1603 * also create a new temporary address.
1605 read_unlock_bh(&in6_dev
->lock
);
1606 ipv6_create_tempaddr(ifp
, NULL
);
1608 read_unlock_bh(&in6_dev
->lock
);
1615 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1616 in6_dev_put(in6_dev
);
1620 * Set destination address.
1621 * Special case for SIT interfaces where we create a new "virtual"
1624 int addrconf_set_dstaddr(void __user
*arg
)
1626 struct in6_ifreq ireq
;
1627 struct net_device
*dev
;
1633 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1636 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1642 if (dev
->type
== ARPHRD_SIT
) {
1645 struct ip_tunnel_parm p
;
1647 err
= -EADDRNOTAVAIL
;
1648 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1651 memset(&p
, 0, sizeof(p
));
1652 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1656 p
.iph
.protocol
= IPPROTO_IPV6
;
1658 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1660 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1661 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1666 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1668 err
= dev_open(dev
);
1678 * Manual configuration of address on an interface
1680 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
)
1682 struct inet6_ifaddr
*ifp
;
1683 struct inet6_dev
*idev
;
1684 struct net_device
*dev
;
1689 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1692 if (!(dev
->flags
&IFF_UP
))
1695 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1698 scope
= ipv6_addr_scope(pfx
);
1700 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, IFA_F_PERMANENT
);
1702 addrconf_dad_start(ifp
, 0);
1707 return PTR_ERR(ifp
);
1710 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1712 struct inet6_ifaddr
*ifp
;
1713 struct inet6_dev
*idev
;
1714 struct net_device
*dev
;
1716 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1719 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1722 read_lock_bh(&idev
->lock
);
1723 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1724 if (ifp
->prefix_len
== plen
&&
1725 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1727 read_unlock_bh(&idev
->lock
);
1731 /* If the last address is deleted administratively,
1732 disable IPv6 on this interface.
1734 if (idev
->addr_list
== NULL
)
1735 addrconf_ifdown(idev
->dev
, 1);
1739 read_unlock_bh(&idev
->lock
);
1740 return -EADDRNOTAVAIL
;
1744 int addrconf_add_ifaddr(void __user
*arg
)
1746 struct in6_ifreq ireq
;
1749 if (!capable(CAP_NET_ADMIN
))
1752 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1756 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1761 int addrconf_del_ifaddr(void __user
*arg
)
1763 struct in6_ifreq ireq
;
1766 if (!capable(CAP_NET_ADMIN
))
1769 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1773 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1778 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1780 struct inet6_ifaddr
* ifp
;
1781 struct in6_addr addr
;
1782 struct net_device
*dev
;
1787 memset(&addr
, 0, sizeof(struct in6_addr
));
1788 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1790 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1791 addr
.s6_addr32
[0] = htonl(0xfe800000);
1794 scope
= IPV6_ADDR_COMPATv4
;
1797 if (addr
.s6_addr32
[3]) {
1798 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1800 spin_lock_bh(&ifp
->lock
);
1801 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1802 spin_unlock_bh(&ifp
->lock
);
1803 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1809 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1810 struct in_device
* in_dev
= __in_dev_get(dev
);
1811 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1812 struct in_ifaddr
* ifa
;
1816 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
1819 addr
.s6_addr32
[3] = ifa
->ifa_local
;
1821 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
1823 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
1824 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1828 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1833 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
1836 spin_lock_bh(&ifp
->lock
);
1837 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1838 spin_unlock_bh(&ifp
->lock
);
1839 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1847 static void init_loopback(struct net_device
*dev
)
1849 struct inet6_dev
*idev
;
1850 struct inet6_ifaddr
* ifp
;
1856 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
1857 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
1861 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
1863 spin_lock_bh(&ifp
->lock
);
1864 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1865 spin_unlock_bh(&ifp
->lock
);
1866 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1871 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1873 struct inet6_ifaddr
* ifp
;
1875 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
1877 addrconf_dad_start(ifp
, 0);
1882 static void addrconf_dev_config(struct net_device
*dev
)
1884 struct in6_addr addr
;
1885 struct inet6_dev
* idev
;
1889 if ((dev
->type
!= ARPHRD_ETHER
) &&
1890 (dev
->type
!= ARPHRD_FDDI
) &&
1891 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
1892 (dev
->type
!= ARPHRD_ARCNET
) &&
1893 (dev
->type
!= ARPHRD_INFINIBAND
)) {
1894 /* Alas, we support only Ethernet autoconfiguration. */
1898 idev
= addrconf_add_dev(dev
);
1902 memset(&addr
, 0, sizeof(struct in6_addr
));
1903 addr
.s6_addr32
[0] = htonl(0xFE800000);
1905 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
1906 addrconf_add_linklocal(idev
, &addr
);
1909 static void addrconf_sit_config(struct net_device
*dev
)
1911 struct inet6_dev
*idev
;
1916 * Configure the tunnel with one of our IPv4
1917 * addresses... we should configure all of
1918 * our v4 addrs in the tunnel
1921 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
1922 printk(KERN_DEBUG
"init sit: add_dev failed\n");
1926 sit_add_v4_addrs(idev
);
1928 if (dev
->flags
&IFF_POINTOPOINT
) {
1929 addrconf_add_mroute(dev
);
1930 addrconf_add_lroute(dev
);
1936 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
1938 struct in6_addr lladdr
;
1940 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
1941 addrconf_add_linklocal(idev
, &lladdr
);
1947 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
1949 struct net_device
*link_dev
;
1951 /* first try to inherit the link-local address from the link device */
1952 if (idev
->dev
->iflink
&&
1953 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
1954 if (!ipv6_inherit_linklocal(idev
, link_dev
))
1957 /* then try to inherit it from any device */
1958 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
1959 if (!ipv6_inherit_linklocal(idev
, link_dev
))
1962 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
1966 * Autoconfigure tunnel with a link-local address so routing protocols,
1967 * DHCPv6, MLD etc. can be run over the virtual link
1970 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
1972 struct inet6_dev
*idev
;
1976 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
1977 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
1980 ip6_tnl_add_linklocal(idev
);
1981 addrconf_add_mroute(dev
);
1984 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
1987 struct net_device
*dev
= (struct net_device
*) data
;
1988 struct inet6_dev
*idev
= __in6_dev_get(dev
);
1994 addrconf_sit_config(dev
);
1996 case ARPHRD_TUNNEL6
:
1997 addrconf_ip6_tnl_config(dev
);
1999 case ARPHRD_LOOPBACK
:
2004 addrconf_dev_config(dev
);
2008 /* If the MTU changed during the interface down, when the
2009 interface up, the changed MTU must be reflected in the
2010 idev as well as routers.
2012 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2013 rt6_mtu_change(dev
, dev
->mtu
);
2014 idev
->cnf
.mtu6
= dev
->mtu
;
2016 idev
->tstamp
= jiffies
;
2017 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2018 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2019 stop IPv6 on this interface.
2021 if (dev
->mtu
< IPV6_MIN_MTU
)
2022 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2026 case NETDEV_CHANGEMTU
:
2027 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2028 rt6_mtu_change(dev
, dev
->mtu
);
2029 idev
->cnf
.mtu6
= dev
->mtu
;
2033 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2036 case NETDEV_UNREGISTER
:
2038 * Remove all addresses from this interface.
2040 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2044 case NETDEV_CHANGENAME
:
2045 #ifdef CONFIG_SYSCTL
2047 addrconf_sysctl_unregister(&idev
->cnf
);
2048 neigh_sysctl_unregister(idev
->nd_parms
);
2049 neigh_sysctl_register(dev
, idev
->nd_parms
,
2050 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2051 &ndisc_ifinfo_sysctl_change
,
2053 addrconf_sysctl_register(idev
, &idev
->cnf
);
2063 * addrconf module should be notified of a device going up
2065 static struct notifier_block ipv6_dev_notf
= {
2066 .notifier_call
= addrconf_notify
,
2070 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2072 struct inet6_dev
*idev
;
2073 struct inet6_ifaddr
*ifa
, **bifa
;
2078 if (dev
== &loopback_dev
&& how
== 1)
2082 neigh_ifdown(&nd_tbl
, dev
);
2084 idev
= __in6_dev_get(dev
);
2088 /* Step 1: remove reference to ipv6 device from parent device.
2092 write_lock_bh(&addrconf_lock
);
2093 dev
->ip6_ptr
= NULL
;
2095 write_unlock_bh(&addrconf_lock
);
2097 /* Step 1.5: remove snmp6 entry */
2098 snmp6_unregister_dev(idev
);
2102 /* Step 2: clear hash table */
2103 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2104 bifa
= &inet6_addr_lst
[i
];
2106 write_lock_bh(&addrconf_hash_lock
);
2107 while ((ifa
= *bifa
) != NULL
) {
2108 if (ifa
->idev
== idev
) {
2109 *bifa
= ifa
->lst_next
;
2110 ifa
->lst_next
= NULL
;
2111 addrconf_del_timer(ifa
);
2115 bifa
= &ifa
->lst_next
;
2117 write_unlock_bh(&addrconf_hash_lock
);
2120 write_lock_bh(&idev
->lock
);
2122 /* Step 3: clear flags for stateless addrconf */
2124 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
);
2126 /* Step 4: clear address list */
2127 #ifdef CONFIG_IPV6_PRIVACY
2128 if (how
== 1 && del_timer(&idev
->regen_timer
))
2131 /* clear tempaddr list */
2132 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2133 idev
->tempaddr_list
= ifa
->tmp_next
;
2134 ifa
->tmp_next
= NULL
;
2136 write_unlock_bh(&idev
->lock
);
2137 spin_lock_bh(&ifa
->lock
);
2140 in6_ifa_put(ifa
->ifpub
);
2143 spin_unlock_bh(&ifa
->lock
);
2145 write_lock_bh(&idev
->lock
);
2148 while ((ifa
= idev
->addr_list
) != NULL
) {
2149 idev
->addr_list
= ifa
->if_next
;
2150 ifa
->if_next
= NULL
;
2152 addrconf_del_timer(ifa
);
2153 write_unlock_bh(&idev
->lock
);
2155 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2158 write_lock_bh(&idev
->lock
);
2160 write_unlock_bh(&idev
->lock
);
2162 /* Step 5: Discard multicast list */
2165 ipv6_mc_destroy_dev(idev
);
2169 /* Step 5: netlink notification of this interface */
2170 idev
->tstamp
= jiffies
;
2171 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2173 /* Shot the device (if unregistered) */
2176 #ifdef CONFIG_SYSCTL
2177 addrconf_sysctl_unregister(&idev
->cnf
);
2178 neigh_sysctl_unregister(idev
->nd_parms
);
2180 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2181 neigh_ifdown(&nd_tbl
, dev
);
2187 static void addrconf_rs_timer(unsigned long data
)
2189 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2191 if (ifp
->idev
->cnf
.forwarding
)
2194 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2196 * Announcement received after solicitation
2202 spin_lock(&ifp
->lock
);
2203 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2204 struct in6_addr all_routers
;
2206 /* The wait after the last probe can be shorter */
2207 addrconf_mod_timer(ifp
, AC_RS
,
2208 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2209 ifp
->idev
->cnf
.rtr_solicit_delay
:
2210 ifp
->idev
->cnf
.rtr_solicit_interval
);
2211 spin_unlock(&ifp
->lock
);
2213 ipv6_addr_all_routers(&all_routers
);
2215 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2217 spin_unlock(&ifp
->lock
);
2219 * Note: we do not support deprecated "all on-link"
2220 * assumption any longer.
2222 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2223 ifp
->idev
->dev
->name
);
2231 * Duplicate Address Detection
2233 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2235 struct inet6_dev
*idev
= ifp
->idev
;
2236 struct net_device
*dev
= idev
->dev
;
2237 unsigned long rand_num
;
2239 addrconf_join_solict(dev
, &ifp
->addr
);
2241 if (ifp
->prefix_len
!= 128 && (ifp
->flags
&IFA_F_PERMANENT
))
2242 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
, 0,
2245 net_srandom(ifp
->addr
.s6_addr32
[3]);
2246 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2248 read_lock_bh(&idev
->lock
);
2251 spin_lock_bh(&ifp
->lock
);
2253 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2254 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2255 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2256 spin_unlock_bh(&ifp
->lock
);
2257 read_unlock_bh(&idev
->lock
);
2259 addrconf_dad_completed(ifp
);
2263 ifp
->probes
= idev
->cnf
.dad_transmits
;
2264 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2266 spin_unlock_bh(&ifp
->lock
);
2268 read_unlock_bh(&idev
->lock
);
2271 static void addrconf_dad_timer(unsigned long data
)
2273 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2274 struct inet6_dev
*idev
= ifp
->idev
;
2275 struct in6_addr unspec
;
2276 struct in6_addr mcaddr
;
2278 read_lock_bh(&idev
->lock
);
2280 read_unlock_bh(&idev
->lock
);
2283 spin_lock_bh(&ifp
->lock
);
2284 if (ifp
->probes
== 0) {
2286 * DAD was successful
2289 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2290 spin_unlock_bh(&ifp
->lock
);
2291 read_unlock_bh(&idev
->lock
);
2293 addrconf_dad_completed(ifp
);
2299 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2300 spin_unlock_bh(&ifp
->lock
);
2301 read_unlock_bh(&idev
->lock
);
2303 /* send a neighbour solicitation for our addr */
2304 memset(&unspec
, 0, sizeof(unspec
));
2305 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2306 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2311 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2313 struct net_device
* dev
= ifp
->idev
->dev
;
2316 * Configure the address for reception. Now it is valid.
2319 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2321 /* If added prefix is link local and forwarding is off,
2322 start sending router solicitations.
2325 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2326 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2327 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2328 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2329 struct in6_addr all_routers
;
2331 ipv6_addr_all_routers(&all_routers
);
2334 * If a host as already performed a random delay
2335 * [...] as part of DAD [...] there is no need
2336 * to delay again before sending the first RS
2338 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2340 spin_lock_bh(&ifp
->lock
);
2342 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2343 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2344 spin_unlock_bh(&ifp
->lock
);
2348 #ifdef CONFIG_PROC_FS
2349 struct if6_iter_state
{
2353 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2355 struct inet6_ifaddr
*ifa
= NULL
;
2356 struct if6_iter_state
*state
= seq
->private;
2358 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2359 ifa
= inet6_addr_lst
[state
->bucket
];
2366 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2368 struct if6_iter_state
*state
= seq
->private;
2370 ifa
= ifa
->lst_next
;
2372 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2373 ifa
= inet6_addr_lst
[state
->bucket
];
2379 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2381 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2384 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2386 return pos
? NULL
: ifa
;
2389 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2391 read_lock_bh(&addrconf_hash_lock
);
2392 return if6_get_idx(seq
, *pos
);
2395 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2397 struct inet6_ifaddr
*ifa
;
2399 ifa
= if6_get_next(seq
, v
);
2404 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2406 read_unlock_bh(&addrconf_hash_lock
);
2409 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2411 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2413 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2415 ifp
->idev
->dev
->ifindex
,
2419 ifp
->idev
->dev
->name
);
2423 static struct seq_operations if6_seq_ops
= {
2424 .start
= if6_seq_start
,
2425 .next
= if6_seq_next
,
2426 .show
= if6_seq_show
,
2427 .stop
= if6_seq_stop
,
2430 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2432 struct seq_file
*seq
;
2434 struct if6_iter_state
*s
= kmalloc(sizeof(*s
), GFP_KERNEL
);
2438 memset(s
, 0, sizeof(*s
));
2440 rc
= seq_open(file
, &if6_seq_ops
);
2444 seq
= file
->private_data
;
2453 static struct file_operations if6_fops
= {
2454 .owner
= THIS_MODULE
,
2455 .open
= if6_seq_open
,
2457 .llseek
= seq_lseek
,
2458 .release
= seq_release_private
,
2461 int __init
if6_proc_init(void)
2463 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2468 void if6_proc_exit(void)
2470 proc_net_remove("if_inet6");
2472 #endif /* CONFIG_PROC_FS */
2475 * Periodic address status verification
2478 static void addrconf_verify(unsigned long foo
)
2480 struct inet6_ifaddr
*ifp
;
2481 unsigned long now
, next
;
2484 spin_lock_bh(&addrconf_verify_lock
);
2486 next
= now
+ ADDR_CHECK_FREQUENCY
;
2488 del_timer(&addr_chk_timer
);
2490 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2493 write_lock(&addrconf_hash_lock
);
2494 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2496 #ifdef CONFIG_IPV6_PRIVACY
2497 unsigned long regen_advance
;
2500 if (ifp
->flags
& IFA_F_PERMANENT
)
2503 spin_lock(&ifp
->lock
);
2504 age
= (now
- ifp
->tstamp
) / HZ
;
2506 #ifdef CONFIG_IPV6_PRIVACY
2507 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2508 ifp
->idev
->cnf
.dad_transmits
*
2509 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2512 if (age
>= ifp
->valid_lft
) {
2513 spin_unlock(&ifp
->lock
);
2515 write_unlock(&addrconf_hash_lock
);
2518 } else if (age
>= ifp
->prefered_lft
) {
2519 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2522 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2524 ifp
->flags
|= IFA_F_DEPRECATED
;
2527 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2528 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2530 spin_unlock(&ifp
->lock
);
2534 write_unlock(&addrconf_hash_lock
);
2536 ipv6_ifa_notify(0, ifp
);
2540 #ifdef CONFIG_IPV6_PRIVACY
2541 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2542 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2543 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2544 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2545 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2546 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2547 if (!ifp
->regen_count
&& ifpub
) {
2550 in6_ifa_hold(ifpub
);
2551 spin_unlock(&ifp
->lock
);
2552 write_unlock(&addrconf_hash_lock
);
2553 ipv6_create_tempaddr(ifpub
, ifp
);
2558 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2559 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2560 spin_unlock(&ifp
->lock
);
2563 /* ifp->prefered_lft <= ifp->valid_lft */
2564 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2565 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2566 spin_unlock(&ifp
->lock
);
2569 write_unlock(&addrconf_hash_lock
);
2572 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2573 add_timer(&addr_chk_timer
);
2574 spin_unlock_bh(&addrconf_verify_lock
);
2578 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2580 struct rtattr
**rta
= arg
;
2581 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2582 struct in6_addr
*pfx
;
2585 if (rta
[IFA_ADDRESS
-1]) {
2586 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2588 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2590 if (rta
[IFA_LOCAL
-1]) {
2591 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2593 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2598 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2602 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2604 struct rtattr
**rta
= arg
;
2605 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2606 struct in6_addr
*pfx
;
2609 if (rta
[IFA_ADDRESS
-1]) {
2610 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2612 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2614 if (rta
[IFA_LOCAL
-1]) {
2615 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2617 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2622 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2625 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
2626 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2628 struct ifaddrmsg
*ifm
;
2629 struct nlmsghdr
*nlh
;
2630 struct ifa_cacheinfo ci
;
2631 unsigned char *b
= skb
->tail
;
2633 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
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
, u16 flags
)
2677 struct ifaddrmsg
*ifm
;
2678 struct nlmsghdr
*nlh
;
2679 struct ifa_cacheinfo ci
;
2680 unsigned char *b
= skb
->tail
;
2682 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2683 ifm
= NLMSG_DATA(nlh
);
2684 ifm
->ifa_family
= AF_INET6
;
2685 ifm
->ifa_prefixlen
= 128;
2686 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2687 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2688 if (ipv6_addr_scope(&ifmca
->mca_addr
)&IFA_SITE
)
2689 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2690 ifm
->ifa_index
= ifmca
->idev
->dev
->ifindex
;
2691 RTA_PUT(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
);
2692 ci
.cstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) / HZ
2693 * 100 + TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) % HZ
2695 ci
.tstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) / HZ
2696 * 100 + TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) % HZ
2698 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2699 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2700 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2701 nlh
->nlmsg_len
= skb
->tail
- b
;
2706 skb_trim(skb
, b
- skb
->data
);
2710 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
2711 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2713 struct ifaddrmsg
*ifm
;
2714 struct nlmsghdr
*nlh
;
2715 struct ifa_cacheinfo ci
;
2716 unsigned char *b
= skb
->tail
;
2718 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2719 ifm
= NLMSG_DATA(nlh
);
2720 ifm
->ifa_family
= AF_INET6
;
2721 ifm
->ifa_prefixlen
= 128;
2722 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2723 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2724 if (ipv6_addr_scope(&ifaca
->aca_addr
)&IFA_SITE
)
2725 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2726 ifm
->ifa_index
= ifaca
->aca_idev
->dev
->ifindex
;
2727 RTA_PUT(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
);
2728 ci
.cstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) / HZ
2729 * 100 + TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) % HZ
2731 ci
.tstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) / HZ
2732 * 100 + TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) % HZ
2734 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2735 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2736 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2737 nlh
->nlmsg_len
= skb
->tail
- b
;
2742 skb_trim(skb
, b
- skb
->data
);
2753 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
2754 enum addr_type_t type
)
2757 int s_idx
, s_ip_idx
;
2759 struct net_device
*dev
;
2760 struct inet6_dev
*idev
= NULL
;
2761 struct inet6_ifaddr
*ifa
;
2762 struct ifmcaddr6
*ifmca
;
2763 struct ifacaddr6
*ifaca
;
2765 s_idx
= cb
->args
[0];
2766 s_ip_idx
= ip_idx
= cb
->args
[1];
2767 read_lock(&dev_base_lock
);
2769 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
2775 if ((idev
= in6_dev_get(dev
)) == NULL
)
2777 read_lock_bh(&idev
->lock
);
2780 /* unicast address incl. temp addr */
2781 for (ifa
= idev
->addr_list
; ifa
;
2782 ifa
= ifa
->if_next
, ip_idx
++) {
2783 if (ip_idx
< s_ip_idx
)
2785 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
2786 NETLINK_CB(cb
->skb
).pid
,
2787 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
2792 case MULTICAST_ADDR
:
2793 /* multicast address */
2794 for (ifmca
= idev
->mc_list
; ifmca
;
2795 ifmca
= ifmca
->next
, ip_idx
++) {
2796 if (ip_idx
< s_ip_idx
)
2798 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
2799 NETLINK_CB(cb
->skb
).pid
,
2800 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
2806 /* anycast address */
2807 for (ifaca
= idev
->ac_list
; ifaca
;
2808 ifaca
= ifaca
->aca_next
, ip_idx
++) {
2809 if (ip_idx
< s_ip_idx
)
2811 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
2812 NETLINK_CB(cb
->skb
).pid
,
2813 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
2821 read_unlock_bh(&idev
->lock
);
2826 read_unlock_bh(&idev
->lock
);
2829 read_unlock(&dev_base_lock
);
2831 cb
->args
[1] = ip_idx
;
2835 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2837 enum addr_type_t type
= UNICAST_ADDR
;
2838 return inet6_dump_addr(skb
, cb
, type
);
2841 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2843 enum addr_type_t type
= MULTICAST_ADDR
;
2844 return inet6_dump_addr(skb
, cb
, type
);
2848 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2850 enum addr_type_t type
= ANYCAST_ADDR
;
2851 return inet6_dump_addr(skb
, cb
, type
);
2854 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
2856 struct sk_buff
*skb
;
2857 int size
= NLMSG_SPACE(sizeof(struct ifaddrmsg
)+128);
2859 skb
= alloc_skb(size
, GFP_ATOMIC
);
2861 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFADDR
, ENOBUFS
);
2864 if (inet6_fill_ifaddr(skb
, ifa
, current
->pid
, 0, event
, 0) < 0) {
2866 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFADDR
, EINVAL
);
2869 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_IFADDR
;
2870 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_IFADDR
, GFP_ATOMIC
);
2873 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
2874 __s32
*array
, int bytes
)
2876 memset(array
, 0, bytes
);
2877 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
2878 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
2879 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
2880 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
2881 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
2882 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
2883 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
2884 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
2885 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
2886 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
2887 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
2888 #ifdef CONFIG_IPV6_PRIVACY
2889 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
2890 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
2891 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
2892 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
2893 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
2895 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
2898 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
2899 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2901 struct net_device
*dev
= idev
->dev
;
2902 __s32
*array
= NULL
;
2903 struct ifinfomsg
*r
;
2904 struct nlmsghdr
*nlh
;
2905 unsigned char *b
= skb
->tail
;
2906 struct rtattr
*subattr
;
2907 __u32 mtu
= dev
->mtu
;
2908 struct ifla_cacheinfo ci
;
2910 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*r
), flags
);
2911 r
= NLMSG_DATA(nlh
);
2912 r
->ifi_family
= AF_INET6
;
2914 r
->ifi_type
= dev
->type
;
2915 r
->ifi_index
= dev
->ifindex
;
2916 r
->ifi_flags
= dev_get_flags(dev
);
2919 RTA_PUT(skb
, IFLA_IFNAME
, strlen(dev
->name
)+1, dev
->name
);
2922 RTA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
2924 RTA_PUT(skb
, IFLA_MTU
, sizeof(mtu
), &mtu
);
2925 if (dev
->ifindex
!= dev
->iflink
)
2926 RTA_PUT(skb
, IFLA_LINK
, sizeof(int), &dev
->iflink
);
2928 subattr
= (struct rtattr
*)skb
->tail
;
2930 RTA_PUT(skb
, IFLA_PROTINFO
, 0, NULL
);
2932 /* return the device flags */
2933 RTA_PUT(skb
, IFLA_INET6_FLAGS
, sizeof(__u32
), &idev
->if_flags
);
2935 /* return interface cacheinfo */
2936 ci
.max_reasm_len
= IPV6_MAXPLEN
;
2937 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2938 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2939 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
2940 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
2941 RTA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
2943 /* return the device sysctl params */
2944 if ((array
= kmalloc(DEVCONF_MAX
* sizeof(*array
), GFP_ATOMIC
)) == NULL
)
2945 goto rtattr_failure
;
2946 ipv6_store_devconf(&idev
->cnf
, array
, DEVCONF_MAX
* sizeof(*array
));
2947 RTA_PUT(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(*array
), array
);
2949 /* XXX - Statistics/MC not implemented */
2950 subattr
->rta_len
= skb
->tail
- (u8
*)subattr
;
2952 nlh
->nlmsg_len
= skb
->tail
- b
;
2960 skb_trim(skb
, b
- skb
->data
);
2964 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2967 int s_idx
= cb
->args
[0];
2968 struct net_device
*dev
;
2969 struct inet6_dev
*idev
;
2971 read_lock(&dev_base_lock
);
2972 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
2975 if ((idev
= in6_dev_get(dev
)) == NULL
)
2977 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
2978 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
2983 read_unlock(&dev_base_lock
);
2989 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
2991 struct sk_buff
*skb
;
2993 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
)+128);
2995 skb
= alloc_skb(size
, GFP_ATOMIC
);
2997 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFINFO
, ENOBUFS
);
3000 if (inet6_fill_ifinfo(skb
, idev
, current
->pid
, 0, event
, 0) < 0) {
3002 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_IFINFO
, EINVAL
);
3005 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_IFINFO
;
3006 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_IFINFO
, GFP_ATOMIC
);
3009 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3010 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3011 int event
, unsigned int flags
)
3013 struct prefixmsg
*pmsg
;
3014 struct nlmsghdr
*nlh
;
3015 unsigned char *b
= skb
->tail
;
3016 struct prefix_cacheinfo ci
;
3018 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3019 pmsg
= NLMSG_DATA(nlh
);
3020 pmsg
->prefix_family
= AF_INET6
;
3021 pmsg
->prefix_pad1
= 0;
3022 pmsg
->prefix_pad2
= 0;
3023 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3024 pmsg
->prefix_len
= pinfo
->prefix_len
;
3025 pmsg
->prefix_type
= pinfo
->type
;
3026 pmsg
->prefix_pad3
= 0;
3028 pmsg
->prefix_flags
= 0;
3030 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3031 if (pinfo
->autoconf
)
3032 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3034 RTA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3036 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3037 ci
.valid_time
= ntohl(pinfo
->valid
);
3038 RTA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3040 nlh
->nlmsg_len
= skb
->tail
- b
;
3045 skb_trim(skb
, b
- skb
->data
);
3049 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3050 struct prefix_info
*pinfo
)
3052 struct sk_buff
*skb
;
3053 int size
= NLMSG_SPACE(sizeof(struct prefixmsg
)+128);
3055 skb
= alloc_skb(size
, GFP_ATOMIC
);
3057 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_PREFIX
, ENOBUFS
);
3060 if (inet6_fill_prefix(skb
, idev
, pinfo
, current
->pid
, 0, event
, 0) < 0) {
3062 netlink_set_err(rtnl
, 0, RTMGRP_IPV6_PREFIX
, EINVAL
);
3065 NETLINK_CB(skb
).dst_groups
= RTMGRP_IPV6_PREFIX
;
3066 netlink_broadcast(rtnl
, skb
, 0, RTMGRP_IPV6_PREFIX
, GFP_ATOMIC
);
3069 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3070 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3071 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3072 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3073 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= inet6_dump_ifaddr
, },
3074 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3075 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3076 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3077 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3078 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3079 .dumpit
= inet6_dump_fib
, },
3082 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3084 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3088 dst_hold(&ifp
->rt
->u
.dst
);
3089 if (ip6_ins_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3090 dst_release(&ifp
->rt
->u
.dst
);
3091 if (ifp
->idev
->cnf
.forwarding
)
3092 addrconf_join_anycast(ifp
);
3095 if (ifp
->idev
->cnf
.forwarding
)
3096 addrconf_leave_anycast(ifp
);
3097 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3098 dst_hold(&ifp
->rt
->u
.dst
);
3099 if (ip6_del_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3100 dst_free(&ifp
->rt
->u
.dst
);
3102 dst_release(&ifp
->rt
->u
.dst
);
3107 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3109 read_lock_bh(&addrconf_lock
);
3110 if (likely(ifp
->idev
->dead
== 0))
3111 __ipv6_ifa_notify(event
, ifp
);
3112 read_unlock_bh(&addrconf_lock
);
3115 #ifdef CONFIG_SYSCTL
3118 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3119 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3121 int *valp
= ctl
->data
;
3125 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3127 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3128 if (valp
!= &ipv6_devconf
.forwarding
) {
3129 if ((!*valp
) ^ (!val
)) {
3130 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3133 dev_forward_change(idev
);
3136 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3137 addrconf_forward_change();
3140 rt6_purge_dflt_routers();
3146 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3147 int __user
*name
, int nlen
,
3148 void __user
*oldval
,
3149 size_t __user
*oldlenp
,
3150 void __user
*newval
, size_t newlen
,
3153 int *valp
= table
->data
;
3156 if (!newval
|| !newlen
)
3158 if (newlen
!= sizeof(int))
3160 if (get_user(new, (int __user
*)newval
))
3164 if (oldval
&& oldlenp
) {
3166 if (get_user(len
, oldlenp
))
3169 if (len
> table
->maxlen
)
3170 len
= table
->maxlen
;
3171 if (copy_to_user(oldval
, valp
, len
))
3173 if (put_user(len
, oldlenp
))
3178 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3179 if (valp
!= &ipv6_devconf
.forwarding
) {
3180 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3182 if (unlikely(idev
== NULL
))
3184 changed
= (!*valp
) ^ (!new);
3187 dev_forward_change(idev
);
3190 addrconf_forward_change();
3194 rt6_purge_dflt_routers();
3201 static struct addrconf_sysctl_table
3203 struct ctl_table_header
*sysctl_header
;
3204 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3205 ctl_table addrconf_dev
[2];
3206 ctl_table addrconf_conf_dir
[2];
3207 ctl_table addrconf_proto_dir
[2];
3208 ctl_table addrconf_root_dir
[2];
3209 } addrconf_sysctl
= {
3210 .sysctl_header
= NULL
,
3213 .ctl_name
= NET_IPV6_FORWARDING
,
3214 .procname
= "forwarding",
3215 .data
= &ipv6_devconf
.forwarding
,
3216 .maxlen
= sizeof(int),
3218 .proc_handler
= &addrconf_sysctl_forward
,
3219 .strategy
= &addrconf_sysctl_forward_strategy
,
3222 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3223 .procname
= "hop_limit",
3224 .data
= &ipv6_devconf
.hop_limit
,
3225 .maxlen
= sizeof(int),
3227 .proc_handler
= proc_dointvec
,
3230 .ctl_name
= NET_IPV6_MTU
,
3232 .data
= &ipv6_devconf
.mtu6
,
3233 .maxlen
= sizeof(int),
3235 .proc_handler
= &proc_dointvec
,
3238 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3239 .procname
= "accept_ra",
3240 .data
= &ipv6_devconf
.accept_ra
,
3241 .maxlen
= sizeof(int),
3243 .proc_handler
= &proc_dointvec
,
3246 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3247 .procname
= "accept_redirects",
3248 .data
= &ipv6_devconf
.accept_redirects
,
3249 .maxlen
= sizeof(int),
3251 .proc_handler
= &proc_dointvec
,
3254 .ctl_name
= NET_IPV6_AUTOCONF
,
3255 .procname
= "autoconf",
3256 .data
= &ipv6_devconf
.autoconf
,
3257 .maxlen
= sizeof(int),
3259 .proc_handler
= &proc_dointvec
,
3262 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3263 .procname
= "dad_transmits",
3264 .data
= &ipv6_devconf
.dad_transmits
,
3265 .maxlen
= sizeof(int),
3267 .proc_handler
= &proc_dointvec
,
3270 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3271 .procname
= "router_solicitations",
3272 .data
= &ipv6_devconf
.rtr_solicits
,
3273 .maxlen
= sizeof(int),
3275 .proc_handler
= &proc_dointvec
,
3278 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3279 .procname
= "router_solicitation_interval",
3280 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3281 .maxlen
= sizeof(int),
3283 .proc_handler
= &proc_dointvec_jiffies
,
3284 .strategy
= &sysctl_jiffies
,
3287 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3288 .procname
= "router_solicitation_delay",
3289 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3290 .maxlen
= sizeof(int),
3292 .proc_handler
= &proc_dointvec_jiffies
,
3293 .strategy
= &sysctl_jiffies
,
3296 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3297 .procname
= "force_mld_version",
3298 .data
= &ipv6_devconf
.force_mld_version
,
3299 .maxlen
= sizeof(int),
3301 .proc_handler
= &proc_dointvec
,
3303 #ifdef CONFIG_IPV6_PRIVACY
3305 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3306 .procname
= "use_tempaddr",
3307 .data
= &ipv6_devconf
.use_tempaddr
,
3308 .maxlen
= sizeof(int),
3310 .proc_handler
= &proc_dointvec
,
3313 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3314 .procname
= "temp_valid_lft",
3315 .data
= &ipv6_devconf
.temp_valid_lft
,
3316 .maxlen
= sizeof(int),
3318 .proc_handler
= &proc_dointvec
,
3321 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3322 .procname
= "temp_prefered_lft",
3323 .data
= &ipv6_devconf
.temp_prefered_lft
,
3324 .maxlen
= sizeof(int),
3326 .proc_handler
= &proc_dointvec
,
3329 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3330 .procname
= "regen_max_retry",
3331 .data
= &ipv6_devconf
.regen_max_retry
,
3332 .maxlen
= sizeof(int),
3334 .proc_handler
= &proc_dointvec
,
3337 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3338 .procname
= "max_desync_factor",
3339 .data
= &ipv6_devconf
.max_desync_factor
,
3340 .maxlen
= sizeof(int),
3342 .proc_handler
= &proc_dointvec
,
3346 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3347 .procname
= "max_addresses",
3348 .data
= &ipv6_devconf
.max_addresses
,
3349 .maxlen
= sizeof(int),
3351 .proc_handler
= &proc_dointvec
,
3354 .ctl_name
= 0, /* sentinel */
3359 .ctl_name
= NET_PROTO_CONF_ALL
,
3362 .child
= addrconf_sysctl
.addrconf_vars
,
3365 .ctl_name
= 0, /* sentinel */
3368 .addrconf_conf_dir
= {
3370 .ctl_name
= NET_IPV6_CONF
,
3373 .child
= addrconf_sysctl
.addrconf_dev
,
3376 .ctl_name
= 0, /* sentinel */
3379 .addrconf_proto_dir
= {
3381 .ctl_name
= NET_IPV6
,
3384 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3387 .ctl_name
= 0, /* sentinel */
3390 .addrconf_root_dir
= {
3392 .ctl_name
= CTL_NET
,
3395 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3398 .ctl_name
= 0, /* sentinel */
3403 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3406 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3407 struct addrconf_sysctl_table
*t
;
3408 char *dev_name
= NULL
;
3410 t
= kmalloc(sizeof(*t
), GFP_KERNEL
);
3413 memcpy(t
, &addrconf_sysctl
, sizeof(*t
));
3414 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3415 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3416 t
->addrconf_vars
[i
].de
= NULL
;
3417 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3420 dev_name
= dev
->name
;
3421 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3423 dev_name
= "default";
3424 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3428 * Make a copy of dev_name, because '.procname' is regarded as const
3429 * by sysctl and we wouldn't want anyone to change it under our feet
3430 * (see SIOCSIFNAME).
3432 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3436 t
->addrconf_dev
[0].procname
= dev_name
;
3438 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3439 t
->addrconf_dev
[0].de
= NULL
;
3440 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3441 t
->addrconf_conf_dir
[0].de
= NULL
;
3442 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3443 t
->addrconf_proto_dir
[0].de
= NULL
;
3444 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3445 t
->addrconf_root_dir
[0].de
= NULL
;
3447 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
, 0);
3448 if (t
->sysctl_header
== NULL
)
3463 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3466 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3468 unregister_sysctl_table(t
->sysctl_header
);
3469 kfree(t
->addrconf_dev
[0].procname
);
3481 int register_inet6addr_notifier(struct notifier_block
*nb
)
3483 return notifier_chain_register(&inet6addr_chain
, nb
);
3486 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
3488 return notifier_chain_unregister(&inet6addr_chain
,nb
);
3492 * Init / cleanup code
3495 int __init
addrconf_init(void)
3499 /* The addrconf netdev notifier requires that loopback_dev
3500 * has it's ipv6 private information allocated and setup
3501 * before it can bring up and give link-local addresses
3502 * to other devices which are up.
3504 * Unfortunately, loopback_dev is not necessarily the first
3505 * entry in the global dev_base list of net devices. In fact,
3506 * it is likely to be the very last entry on that list.
3507 * So this causes the notifier registry below to try and
3508 * give link-local addresses to all devices besides loopback_dev
3509 * first, then loopback_dev, which cases all the non-loopback_dev
3510 * devices to fail to get a link-local address.
3512 * So, as a temporary fix, allocate the ipv6 structure for
3513 * loopback_dev first by hand.
3514 * Longer term, all of the dependencies ipv6 has upon the loopback
3515 * device and it being up should be removed.
3518 if (!ipv6_add_dev(&loopback_dev
))
3524 register_netdevice_notifier(&ipv6_dev_notf
);
3526 #ifdef CONFIG_IPV6_PRIVACY
3527 md5_tfm
= crypto_alloc_tfm("md5", 0);
3528 if (unlikely(md5_tfm
== NULL
))
3530 "failed to load transform for md5\n");
3534 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
3535 #ifdef CONFIG_SYSCTL
3536 addrconf_sysctl
.sysctl_header
=
3537 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
, 0);
3538 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
3544 void __exit
addrconf_cleanup(void)
3546 struct net_device
*dev
;
3547 struct inet6_dev
*idev
;
3548 struct inet6_ifaddr
*ifa
;
3551 unregister_netdevice_notifier(&ipv6_dev_notf
);
3553 rtnetlink_links
[PF_INET6
] = NULL
;
3554 #ifdef CONFIG_SYSCTL
3555 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
3556 addrconf_sysctl_unregister(&ipv6_devconf
);
3565 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
3566 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3568 addrconf_ifdown(dev
, 1);
3570 addrconf_ifdown(&loopback_dev
, 2);
3576 write_lock_bh(&addrconf_hash_lock
);
3577 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3578 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
3579 struct inet6_ifaddr
*bifa
;
3582 ifa
= ifa
->lst_next
;
3583 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
3584 /* Do not free it; something is wrong.
3585 Now we can investigate it with debugger.
3589 write_unlock_bh(&addrconf_hash_lock
);
3591 del_timer(&addr_chk_timer
);
3595 #ifdef CONFIG_IPV6_PRIVACY
3596 if (likely(md5_tfm
!= NULL
)) {
3597 crypto_free_tfm(md5_tfm
);
3602 #ifdef CONFIG_PROC_FS
3603 proc_net_remove("if_inet6");