2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/config.h>
44 #include <linux/errno.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/sched.h>
49 #include <linux/net.h>
50 #include <linux/in6.h>
51 #include <linux/netdevice.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
59 #include <linux/sysctl.h>
61 #include <linux/capability.h>
62 #include <linux/delay.h>
63 #include <linux/notifier.h>
64 #include <linux/string.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
81 #include <linux/crypto.h>
82 #include <linux/scatterlist.h>
85 #include <asm/uaccess.h>
87 #include <linux/proc_fs.h>
88 #include <linux/seq_file.h>
90 /* Set to 3 to get tracing... */
94 #define ADBG(x) printk x
99 #define INFINITY_LIFE_TIME 0xFFFFFFFF
100 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
103 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
104 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
107 #ifdef CONFIG_IPV6_PRIVACY
108 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
109 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
110 static void ipv6_regen_rndid(unsigned long data
);
112 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
113 static struct crypto_tfm
*md5_tfm
;
114 static DEFINE_SPINLOCK(md5_tfm_lock
);
117 static int ipv6_count_addresses(struct inet6_dev
*idev
);
120 * Configured unicast address hash table
122 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
123 static DEFINE_RWLOCK(addrconf_hash_lock
);
125 /* Protects inet6 devices */
126 DEFINE_RWLOCK(addrconf_lock
);
128 static void addrconf_verify(unsigned long);
130 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
131 static DEFINE_SPINLOCK(addrconf_verify_lock
);
133 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
134 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
136 static int addrconf_ifdown(struct net_device
*dev
, int how
);
138 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
139 static void addrconf_dad_timer(unsigned long data
);
140 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
141 static void addrconf_dad_run(struct inet6_dev
*idev
);
142 static void addrconf_rs_timer(unsigned long data
);
143 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
144 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
146 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
147 struct prefix_info
*pinfo
);
148 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
150 static struct notifier_block
*inet6addr_chain
;
152 struct ipv6_devconf ipv6_devconf
= {
154 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
155 .mtu6
= IPV6_MIN_MTU
,
157 .accept_redirects
= 1,
159 .force_mld_version
= 0,
161 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
162 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
163 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
164 #ifdef CONFIG_IPV6_PRIVACY
166 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
167 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
168 .regen_max_retry
= REGEN_MAX_RETRY
,
169 .max_desync_factor
= MAX_DESYNC_FACTOR
,
171 .max_addresses
= IPV6_MAX_ADDRESSES
,
174 static struct ipv6_devconf ipv6_devconf_dflt
= {
176 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
177 .mtu6
= IPV6_MIN_MTU
,
179 .accept_redirects
= 1,
182 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
183 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
184 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
185 #ifdef CONFIG_IPV6_PRIVACY
187 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
188 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
189 .regen_max_retry
= REGEN_MAX_RETRY
,
190 .max_desync_factor
= MAX_DESYNC_FACTOR
,
192 .max_addresses
= IPV6_MAX_ADDRESSES
,
195 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
197 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
199 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
201 #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
203 static inline unsigned ipv6_addr_scope2type(unsigned scope
)
206 case IPV6_ADDR_SCOPE_NODELOCAL
:
207 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL
) |
209 case IPV6_ADDR_SCOPE_LINKLOCAL
:
210 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
) |
211 IPV6_ADDR_LINKLOCAL
);
212 case IPV6_ADDR_SCOPE_SITELOCAL
:
213 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
) |
214 IPV6_ADDR_SITELOCAL
);
216 return IPV6_ADDR_SCOPE_TYPE(scope
);
219 int __ipv6_addr_type(const struct in6_addr
*addr
)
223 st
= addr
->s6_addr32
[0];
225 /* Consider all addresses with the first three bits different of
226 000 and 111 as unicasts.
228 if ((st
& htonl(0xE0000000)) != htonl(0x00000000) &&
229 (st
& htonl(0xE0000000)) != htonl(0xE0000000))
230 return (IPV6_ADDR_UNICAST
|
231 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
));
233 if ((st
& htonl(0xFF000000)) == htonl(0xFF000000)) {
235 /* addr-select 3.1 */
236 return (IPV6_ADDR_MULTICAST
|
237 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr
)));
240 if ((st
& htonl(0xFFC00000)) == htonl(0xFE800000))
241 return (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_UNICAST
|
242 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.1 */
243 if ((st
& htonl(0xFFC00000)) == htonl(0xFEC00000))
244 return (IPV6_ADDR_SITELOCAL
| IPV6_ADDR_UNICAST
|
245 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
)); /* addr-select 3.1 */
247 if ((addr
->s6_addr32
[0] | addr
->s6_addr32
[1]) == 0) {
248 if (addr
->s6_addr32
[2] == 0) {
249 if (addr
->s6_addr32
[3] == 0)
250 return IPV6_ADDR_ANY
;
252 if (addr
->s6_addr32
[3] == htonl(0x00000001))
253 return (IPV6_ADDR_LOOPBACK
| IPV6_ADDR_UNICAST
|
254 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.4 */
256 return (IPV6_ADDR_COMPATv4
| IPV6_ADDR_UNICAST
|
257 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
260 if (addr
->s6_addr32
[2] == htonl(0x0000ffff))
261 return (IPV6_ADDR_MAPPED
|
262 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
265 return (IPV6_ADDR_RESERVED
|
266 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.4 */
269 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
271 if (del_timer(&ifp
->timer
))
275 enum addrconf_timer_t
282 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
283 enum addrconf_timer_t what
,
286 if (!del_timer(&ifp
->timer
))
291 ifp
->timer
.function
= addrconf_dad_timer
;
294 ifp
->timer
.function
= addrconf_rs_timer
;
298 ifp
->timer
.expires
= jiffies
+ when
;
299 add_timer(&ifp
->timer
);
302 /* Nobody refers to this device, we may destroy it. */
304 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
306 struct net_device
*dev
= idev
->dev
;
307 BUG_TRAP(idev
->addr_list
==NULL
);
308 BUG_TRAP(idev
->mc_list
==NULL
);
309 #ifdef NET_REFCNT_DEBUG
310 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
314 printk("Freeing alive inet6 device %p\n", idev
);
317 snmp6_free_dev(idev
);
321 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
323 struct inet6_dev
*ndev
;
327 if (dev
->mtu
< IPV6_MIN_MTU
)
330 ndev
= kmalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
333 memset(ndev
, 0, sizeof(struct inet6_dev
));
335 rwlock_init(&ndev
->lock
);
337 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
338 ndev
->cnf
.mtu6
= dev
->mtu
;
339 ndev
->cnf
.sysctl
= NULL
;
340 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
341 if (ndev
->nd_parms
== NULL
) {
345 /* We refer to the device */
348 if (snmp6_alloc_dev(ndev
) < 0) {
350 "%s(): cannot allocate memory for statistics; dev=%s.\n",
351 __FUNCTION__
, dev
->name
));
352 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
354 in6_dev_finish_destroy(ndev
);
358 if (snmp6_register_dev(ndev
) < 0) {
360 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
361 __FUNCTION__
, dev
->name
));
362 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
364 in6_dev_finish_destroy(ndev
);
368 /* One reference from device. We must do this before
369 * we invoke __ipv6_regen_rndid().
373 #ifdef CONFIG_IPV6_PRIVACY
374 get_random_bytes(ndev
->rndid
, sizeof(ndev
->rndid
));
375 get_random_bytes(ndev
->entropy
, sizeof(ndev
->entropy
));
376 init_timer(&ndev
->regen_timer
);
377 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
378 ndev
->regen_timer
.data
= (unsigned long) ndev
;
379 if ((dev
->flags
&IFF_LOOPBACK
) ||
380 dev
->type
== ARPHRD_TUNNEL
||
381 dev
->type
== ARPHRD_NONE
||
382 dev
->type
== ARPHRD_SIT
) {
384 "%s: Disabled Privacy Extensions\n",
386 ndev
->cnf
.use_tempaddr
= -1;
389 ipv6_regen_rndid((unsigned long) ndev
);
393 if (netif_carrier_ok(dev
))
394 ndev
->if_flags
|= IF_READY
;
396 write_lock_bh(&addrconf_lock
);
398 write_unlock_bh(&addrconf_lock
);
400 ipv6_mc_init_dev(ndev
);
401 ndev
->tstamp
= jiffies
;
403 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
404 NET_IPV6_NEIGH
, "ipv6",
405 &ndisc_ifinfo_sysctl_change
,
407 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
413 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
415 struct inet6_dev
*idev
;
419 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
420 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
424 if (dev
->flags
&IFF_UP
)
430 static void dev_forward_change(struct inet6_dev
*idev
)
432 struct net_device
*dev
;
433 struct inet6_ifaddr
*ifa
;
434 struct in6_addr addr
;
439 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
440 ipv6_addr_all_routers(&addr
);
442 if (idev
->cnf
.forwarding
)
443 ipv6_dev_mc_inc(dev
, &addr
);
445 ipv6_dev_mc_dec(dev
, &addr
);
447 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
448 if (idev
->cnf
.forwarding
)
449 addrconf_join_anycast(ifa
);
451 addrconf_leave_anycast(ifa
);
456 static void addrconf_forward_change(void)
458 struct net_device
*dev
;
459 struct inet6_dev
*idev
;
461 read_lock(&dev_base_lock
);
462 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
463 read_lock(&addrconf_lock
);
464 idev
= __in6_dev_get(dev
);
466 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
467 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
469 dev_forward_change(idev
);
471 read_unlock(&addrconf_lock
);
473 read_unlock(&dev_base_lock
);
477 /* Nobody refers to this ifaddr, destroy it */
479 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
481 BUG_TRAP(ifp
->if_next
==NULL
);
482 BUG_TRAP(ifp
->lst_next
==NULL
);
483 #ifdef NET_REFCNT_DEBUG
484 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
487 in6_dev_put(ifp
->idev
);
489 if (del_timer(&ifp
->timer
))
490 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
493 printk("Freeing alive inet6 address %p\n", ifp
);
496 dst_release(&ifp
->rt
->u
.dst
);
501 /* On success it returns ifp with increased reference count */
503 static struct inet6_ifaddr
*
504 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
505 int scope
, u32 flags
)
507 struct inet6_ifaddr
*ifa
= NULL
;
512 read_lock_bh(&addrconf_lock
);
514 err
= -ENODEV
; /*XXX*/
518 write_lock(&addrconf_hash_lock
);
520 /* Ignore adding duplicate addresses on an interface */
521 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
522 ADBG(("ipv6_add_addr: already assigned\n"));
527 ifa
= kmalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
530 ADBG(("ipv6_add_addr: malloc failed\n"));
535 rt
= addrconf_dst_alloc(idev
, addr
, 0);
541 memset(ifa
, 0, sizeof(struct inet6_ifaddr
));
542 ipv6_addr_copy(&ifa
->addr
, addr
);
544 spin_lock_init(&ifa
->lock
);
545 init_timer(&ifa
->timer
);
546 ifa
->timer
.data
= (unsigned long) ifa
;
548 ifa
->prefix_len
= pfxlen
;
549 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
550 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
557 /* Add to big hash table */
558 hash
= ipv6_addr_hash(addr
);
560 ifa
->lst_next
= inet6_addr_lst
[hash
];
561 inet6_addr_lst
[hash
] = ifa
;
563 write_unlock(&addrconf_hash_lock
);
565 write_lock(&idev
->lock
);
566 /* Add to inet6_dev unicast addr list. */
567 ifa
->if_next
= idev
->addr_list
;
568 idev
->addr_list
= ifa
;
570 #ifdef CONFIG_IPV6_PRIVACY
571 if (ifa
->flags
&IFA_F_TEMPORARY
) {
572 ifa
->tmp_next
= idev
->tempaddr_list
;
573 idev
->tempaddr_list
= ifa
;
581 write_unlock(&idev
->lock
);
583 read_unlock_bh(&addrconf_lock
);
585 if (likely(err
== 0))
586 notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
594 write_unlock(&addrconf_hash_lock
);
598 /* This function wants to get referenced ifp and releases it before return */
600 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
602 struct inet6_ifaddr
*ifa
, **ifap
;
603 struct inet6_dev
*idev
= ifp
->idev
;
605 int deleted
= 0, onlink
= 0;
606 unsigned long expires
= jiffies
;
608 hash
= ipv6_addr_hash(&ifp
->addr
);
612 write_lock_bh(&addrconf_hash_lock
);
613 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
614 ifap
= &ifa
->lst_next
) {
616 *ifap
= ifa
->lst_next
;
618 ifa
->lst_next
= NULL
;
622 write_unlock_bh(&addrconf_hash_lock
);
624 write_lock_bh(&idev
->lock
);
625 #ifdef CONFIG_IPV6_PRIVACY
626 if (ifp
->flags
&IFA_F_TEMPORARY
) {
627 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
628 ifap
= &ifa
->tmp_next
) {
630 *ifap
= ifa
->tmp_next
;
632 in6_ifa_put(ifp
->ifpub
);
636 ifa
->tmp_next
= NULL
;
643 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
645 *ifap
= ifa
->if_next
;
648 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
652 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
653 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
655 if (ifa
->flags
& IFA_F_PERMANENT
) {
660 unsigned long lifetime
;
665 spin_lock(&ifa
->lock
);
666 lifetime
= min_t(unsigned long,
667 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
668 if (time_before(expires
,
669 ifa
->tstamp
+ lifetime
* HZ
))
670 expires
= ifa
->tstamp
+ lifetime
* HZ
;
671 spin_unlock(&ifa
->lock
);
675 ifap
= &ifa
->if_next
;
677 write_unlock_bh(&idev
->lock
);
679 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
681 notifier_call_chain(&inet6addr_chain
,NETDEV_DOWN
,ifp
);
683 addrconf_del_timer(ifp
);
686 * Purge or update corresponding prefix
688 * 1) we don't purge prefix here if address was not permanent.
689 * prefix is managed by its own lifetime.
690 * 2) if there're no addresses, delete prefix.
691 * 3) if there're still other permanent address(es),
692 * corresponding prefix is still permanent.
693 * 4) otherwise, update prefix lifetime to the
694 * longest valid lifetime among the corresponding
695 * addresses on the device.
696 * Note: subsequent RA will update lifetime.
700 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
701 struct in6_addr prefix
;
704 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
705 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
707 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
709 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
711 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
712 rt
->rt6i_expires
= expires
;
713 rt
->rt6i_flags
|= RTF_EXPIRES
;
716 dst_release(&rt
->u
.dst
);
722 #ifdef CONFIG_IPV6_PRIVACY
723 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
725 struct inet6_dev
*idev
= ifp
->idev
;
726 struct in6_addr addr
, *tmpaddr
;
727 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
732 write_lock(&idev
->lock
);
734 spin_lock_bh(&ift
->lock
);
735 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
736 spin_unlock_bh(&ift
->lock
);
743 if (idev
->cnf
.use_tempaddr
<= 0) {
744 write_unlock(&idev
->lock
);
746 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
751 spin_lock_bh(&ifp
->lock
);
752 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
753 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
754 spin_unlock_bh(&ifp
->lock
);
755 write_unlock(&idev
->lock
);
757 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
763 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
764 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
765 spin_unlock_bh(&ifp
->lock
);
766 write_unlock(&idev
->lock
);
768 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
774 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
775 tmp_valid_lft
= min_t(__u32
,
777 idev
->cnf
.temp_valid_lft
);
778 tmp_prefered_lft
= min_t(__u32
,
780 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
781 tmp_plen
= ifp
->prefix_len
;
782 max_addresses
= idev
->cnf
.max_addresses
;
783 tmp_cstamp
= ifp
->cstamp
;
784 tmp_tstamp
= ifp
->tstamp
;
785 spin_unlock_bh(&ifp
->lock
);
787 write_unlock(&idev
->lock
);
788 ift
= !max_addresses
||
789 ipv6_count_addresses(idev
) < max_addresses
?
790 ipv6_add_addr(idev
, &addr
, tmp_plen
,
791 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
792 if (!ift
|| IS_ERR(ift
)) {
796 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
798 write_lock(&idev
->lock
);
802 spin_lock_bh(&ift
->lock
);
804 ift
->valid_lft
= tmp_valid_lft
;
805 ift
->prefered_lft
= tmp_prefered_lft
;
806 ift
->cstamp
= tmp_cstamp
;
807 ift
->tstamp
= tmp_tstamp
;
808 spin_unlock_bh(&ift
->lock
);
810 addrconf_dad_start(ift
, 0);
819 * Choose an appropriate source address (RFC3484)
821 struct ipv6_saddr_score
{
829 #define IPV6_SADDR_SCORE_LOCAL 0x0001
830 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
831 #define IPV6_SADDR_SCORE_HOA 0x0008
832 #define IPV6_SADDR_SCORE_OIF 0x0010
833 #define IPV6_SADDR_SCORE_LABEL 0x0020
834 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
836 static int inline ipv6_saddr_preferred(int type
)
838 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
839 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
844 /* static matching label */
845 static int inline ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
848 * prefix (longest match) label
849 * -----------------------------
856 if (type
& IPV6_ADDR_LOOPBACK
)
858 else if (type
& IPV6_ADDR_COMPATv4
)
860 else if (type
& IPV6_ADDR_MAPPED
)
862 else if (addr
->s6_addr16
[0] == htons(0x2002))
867 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
868 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
870 struct ipv6_saddr_score hiscore
;
871 struct inet6_ifaddr
*ifa_result
= NULL
;
872 int daddr_type
= __ipv6_addr_type(daddr
);
873 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
874 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
875 struct net_device
*dev
;
877 memset(&hiscore
, 0, sizeof(hiscore
));
879 read_lock(&dev_base_lock
);
880 read_lock(&addrconf_lock
);
882 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
883 struct inet6_dev
*idev
;
884 struct inet6_ifaddr
*ifa
;
886 /* Rule 0: Candidate Source Address (section 4)
887 * - multicast and link-local destination address,
888 * the set of candidate source address MUST only
889 * include addresses assigned to interfaces
890 * belonging to the same link as the outgoing
892 * (- For site-local destination addresses, the
893 * set of candidate source addresses MUST only
894 * include addresses assigned to interfaces
895 * belonging to the same site as the outgoing
898 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
899 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
900 daddr_dev
&& dev
!= daddr_dev
)
903 idev
= __in6_dev_get(dev
);
907 read_lock_bh(&idev
->lock
);
908 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
909 struct ipv6_saddr_score score
;
911 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
914 * - Tentative Address (RFC2462 section 5.4)
915 * - A tentative address is not considered
916 * "assigned to an interface" in the traditional
918 * - Candidate Source Address (section 4)
919 * - In any case, anycast addresses, multicast
920 * addresses, and the unspecified address MUST
921 * NOT be included in a candidate set.
923 if (ifa
->flags
& IFA_F_TENTATIVE
)
925 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
926 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
927 LIMIT_NETDEBUG(KERN_DEBUG
928 "ADDRCONF: unspecified / multicast address"
929 "assigned as unicast address on %s",
939 if (ifa_result
== NULL
) {
940 /* record it if the first available entry */
944 /* Rule 1: Prefer same address */
945 if (hiscore
.rule
< 1) {
946 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
947 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
950 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
951 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
952 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
957 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
961 /* Rule 2: Prefer appropriate scope */
962 if (hiscore
.rule
< 2) {
963 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
966 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
967 if (hiscore
.scope
< score
.scope
) {
968 if (hiscore
.scope
< daddr_scope
) {
973 } else if (score
.scope
< hiscore
.scope
) {
974 if (score
.scope
< daddr_scope
)
982 /* Rule 3: Avoid deprecated address */
983 if (hiscore
.rule
< 3) {
984 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
985 !(ifa_result
->flags
& IFA_F_DEPRECATED
))
986 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
989 if (ipv6_saddr_preferred(score
.addr_type
) ||
990 !(ifa
->flags
& IFA_F_DEPRECATED
)) {
991 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
992 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
997 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1001 /* Rule 4: Prefer home address -- not implemented yet */
1002 if (hiscore
.rule
< 4)
1005 /* Rule 5: Prefer outgoing interface */
1006 if (hiscore
.rule
< 5) {
1007 if (daddr_dev
== NULL
||
1008 daddr_dev
== ifa_result
->idev
->dev
)
1009 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1012 if (daddr_dev
== NULL
||
1013 daddr_dev
== ifa
->idev
->dev
) {
1014 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1015 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1020 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1024 /* Rule 6: Prefer matching label */
1025 if (hiscore
.rule
< 6) {
1026 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1027 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1030 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1031 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1032 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1037 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1041 #ifdef CONFIG_IPV6_PRIVACY
1042 /* Rule 7: Prefer public address
1043 * Note: prefer temprary address if use_tempaddr >= 2
1045 if (hiscore
.rule
< 7) {
1046 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1047 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1048 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1051 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1052 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1053 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1054 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1059 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1063 /* Rule 8: Use longest matching prefix */
1064 if (hiscore
.rule
< 8) {
1065 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1068 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1069 if (score
.matchlen
> hiscore
.matchlen
) {
1074 else if (score
.matchlen
< hiscore
.matchlen
)
1078 /* Final Rule: choose first available one */
1082 in6_ifa_put(ifa_result
);
1087 read_unlock_bh(&idev
->lock
);
1089 read_unlock(&addrconf_lock
);
1090 read_unlock(&dev_base_lock
);
1093 return -EADDRNOTAVAIL
;
1095 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1096 in6_ifa_put(ifa_result
);
1101 int ipv6_get_saddr(struct dst_entry
*dst
,
1102 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1104 return ipv6_dev_get_saddr(dst
? ((struct rt6_info
*)dst
)->rt6i_idev
->dev
: NULL
, daddr
, saddr
);
1108 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
1110 struct inet6_dev
*idev
;
1111 int err
= -EADDRNOTAVAIL
;
1113 read_lock(&addrconf_lock
);
1114 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1115 struct inet6_ifaddr
*ifp
;
1117 read_lock_bh(&idev
->lock
);
1118 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1119 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1120 ipv6_addr_copy(addr
, &ifp
->addr
);
1125 read_unlock_bh(&idev
->lock
);
1127 read_unlock(&addrconf_lock
);
1131 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1134 struct inet6_ifaddr
*ifp
;
1136 read_lock_bh(&idev
->lock
);
1137 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1139 read_unlock_bh(&idev
->lock
);
1143 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1145 struct inet6_ifaddr
* ifp
;
1146 u8 hash
= ipv6_addr_hash(addr
);
1148 read_lock_bh(&addrconf_hash_lock
);
1149 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1150 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1151 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1152 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1153 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1157 read_unlock_bh(&addrconf_hash_lock
);
1162 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1164 struct inet6_ifaddr
* ifp
;
1165 u8 hash
= ipv6_addr_hash(addr
);
1167 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1168 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1169 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1176 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1178 struct inet6_ifaddr
* ifp
;
1179 u8 hash
= ipv6_addr_hash(addr
);
1181 read_lock_bh(&addrconf_hash_lock
);
1182 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1183 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1184 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1185 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1191 read_unlock_bh(&addrconf_hash_lock
);
1196 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1198 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1199 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1200 u32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1201 u32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1202 int sk_ipv6only
= ipv6_only_sock(sk
);
1203 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1204 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1205 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1207 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1210 if (addr_type2
== IPV6_ADDR_ANY
&&
1211 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1214 if (addr_type
== IPV6_ADDR_ANY
&&
1215 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1218 if (sk2_rcv_saddr6
&&
1219 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1222 if (addr_type
== IPV6_ADDR_MAPPED
&&
1224 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1230 /* Gets referenced address, destroys ifaddr */
1232 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1234 if (ifp
->flags
&IFA_F_PERMANENT
) {
1235 spin_lock_bh(&ifp
->lock
);
1236 addrconf_del_timer(ifp
);
1237 ifp
->flags
|= IFA_F_TENTATIVE
;
1238 spin_unlock_bh(&ifp
->lock
);
1240 #ifdef CONFIG_IPV6_PRIVACY
1241 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1242 struct inet6_ifaddr
*ifpub
;
1243 spin_lock_bh(&ifp
->lock
);
1246 in6_ifa_hold(ifpub
);
1247 spin_unlock_bh(&ifp
->lock
);
1248 ipv6_create_tempaddr(ifpub
, ifp
);
1251 spin_unlock_bh(&ifp
->lock
);
1259 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1261 if (net_ratelimit())
1262 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1263 addrconf_dad_stop(ifp
);
1266 /* Join to solicited addr multicast group. */
1268 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1270 struct in6_addr maddr
;
1272 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1275 addrconf_addr_solict_mult(addr
, &maddr
);
1276 ipv6_dev_mc_inc(dev
, &maddr
);
1279 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1281 struct in6_addr maddr
;
1283 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1286 addrconf_addr_solict_mult(addr
, &maddr
);
1287 __ipv6_dev_mc_dec(idev
, &maddr
);
1290 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1292 struct in6_addr addr
;
1293 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1294 if (ipv6_addr_any(&addr
))
1296 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1299 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1301 struct in6_addr addr
;
1302 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1303 if (ipv6_addr_any(&addr
))
1305 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1308 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1310 switch (dev
->type
) {
1313 case ARPHRD_IEEE802_TR
:
1314 if (dev
->addr_len
!= ETH_ALEN
)
1316 memcpy(eui
, dev
->dev_addr
, 3);
1317 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1320 * The zSeries OSA network cards can be shared among various
1321 * OS instances, but the OSA cards have only one MAC address.
1322 * This leads to duplicate address conflicts in conjunction
1323 * with IPv6 if more than one instance uses the same card.
1325 * The driver for these cards can deliver a unique 16-bit
1326 * identifier for each instance sharing the same card. It is
1327 * placed instead of 0xFFFE in the interface identifier. The
1328 * "u" bit of the interface identifier is not inverted in this
1329 * case. Hence the resulting interface identifier has local
1330 * scope according to RFC2373.
1333 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1334 eui
[4] = dev
->dev_id
& 0xFF;
1342 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1343 if (dev
->addr_len
!= ARCNET_ALEN
)
1346 eui
[7] = *(u8
*)dev
->dev_addr
;
1348 case ARPHRD_INFINIBAND
:
1349 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1351 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1358 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1361 struct inet6_ifaddr
*ifp
;
1363 read_lock_bh(&idev
->lock
);
1364 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1365 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1366 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1371 read_unlock_bh(&idev
->lock
);
1375 #ifdef CONFIG_IPV6_PRIVACY
1376 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1377 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1379 struct net_device
*dev
;
1380 struct scatterlist sg
[2];
1382 sg_set_buf(&sg
[0], idev
->entropy
, 8);
1383 sg_set_buf(&sg
[1], idev
->work_eui64
, 8);
1387 if (ipv6_generate_eui64(idev
->work_eui64
, dev
)) {
1389 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1391 get_random_bytes(idev
->work_eui64
, sizeof(idev
->work_eui64
));
1394 spin_lock(&md5_tfm_lock
);
1395 if (unlikely(md5_tfm
== NULL
)) {
1396 spin_unlock(&md5_tfm_lock
);
1399 crypto_digest_init(md5_tfm
);
1400 crypto_digest_update(md5_tfm
, sg
, 2);
1401 crypto_digest_final(md5_tfm
, idev
->work_digest
);
1402 spin_unlock(&md5_tfm_lock
);
1404 memcpy(idev
->rndid
, &idev
->work_digest
[0], 8);
1405 idev
->rndid
[0] &= ~0x02;
1406 memcpy(idev
->entropy
, &idev
->work_digest
[8], 8);
1409 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1410 * check if generated address is not inappropriate
1412 * - Reserved subnet anycast (RFC 2526)
1413 * 11111101 11....11 1xxxxxxx
1414 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1415 * 00-00-5E-FE-xx-xx-xx-xx
1417 * - XXX: already assigned to an address on the device
1419 if (idev
->rndid
[0] == 0xfd &&
1420 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1421 (idev
->rndid
[7]&0x80))
1423 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1424 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1426 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1433 static void ipv6_regen_rndid(unsigned long data
)
1435 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1436 unsigned long expires
;
1438 read_lock_bh(&addrconf_lock
);
1439 write_lock_bh(&idev
->lock
);
1444 if (__ipv6_regen_rndid(idev
) < 0)
1448 idev
->cnf
.temp_prefered_lft
* HZ
-
1449 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1450 if (time_before(expires
, jiffies
)) {
1452 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1457 if (!mod_timer(&idev
->regen_timer
, expires
))
1461 write_unlock_bh(&idev
->lock
);
1462 read_unlock_bh(&addrconf_lock
);
1466 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1469 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1470 ret
= __ipv6_regen_rndid(idev
);
1480 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1481 unsigned long expires
, u32 flags
)
1483 struct in6_rtmsg rtmsg
;
1485 memset(&rtmsg
, 0, sizeof(rtmsg
));
1486 ipv6_addr_copy(&rtmsg
.rtmsg_dst
, pfx
);
1487 rtmsg
.rtmsg_dst_len
= plen
;
1488 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1489 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1490 rtmsg
.rtmsg_info
= expires
;
1491 rtmsg
.rtmsg_flags
= RTF_UP
|flags
;
1492 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1494 /* Prevent useless cloning on PtP SIT.
1495 This thing is done here expecting that the whole
1496 class of non-broadcast devices need not cloning.
1498 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
&IFF_POINTOPOINT
))
1499 rtmsg
.rtmsg_flags
|= RTF_NONEXTHOP
;
1501 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1504 /* Create "default" multicast route to the interface */
1506 static void addrconf_add_mroute(struct net_device
*dev
)
1508 struct in6_rtmsg rtmsg
;
1510 memset(&rtmsg
, 0, sizeof(rtmsg
));
1511 ipv6_addr_set(&rtmsg
.rtmsg_dst
,
1512 htonl(0xFF000000), 0, 0, 0);
1513 rtmsg
.rtmsg_dst_len
= 8;
1514 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1515 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1516 rtmsg
.rtmsg_flags
= RTF_UP
;
1517 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1518 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1521 static void sit_route_add(struct net_device
*dev
)
1523 struct in6_rtmsg rtmsg
;
1525 memset(&rtmsg
, 0, sizeof(rtmsg
));
1527 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1528 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1530 /* prefix length - 96 bits "::d.d.d.d" */
1531 rtmsg
.rtmsg_dst_len
= 96;
1532 rtmsg
.rtmsg_flags
= RTF_UP
|RTF_NONEXTHOP
;
1533 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1535 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1538 static void addrconf_add_lroute(struct net_device
*dev
)
1540 struct in6_addr addr
;
1542 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1543 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1546 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1548 struct inet6_dev
*idev
;
1552 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1555 /* Add default multicast route */
1556 addrconf_add_mroute(dev
);
1558 /* Add link local route */
1559 addrconf_add_lroute(dev
);
1563 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1565 struct prefix_info
*pinfo
;
1569 unsigned long rt_expires
;
1570 struct inet6_dev
*in6_dev
;
1572 pinfo
= (struct prefix_info
*) opt
;
1574 if (len
< sizeof(struct prefix_info
)) {
1575 ADBG(("addrconf: prefix option too short\n"));
1580 * Validation checks ([ADDRCONF], page 19)
1583 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1585 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1588 valid_lft
= ntohl(pinfo
->valid
);
1589 prefered_lft
= ntohl(pinfo
->prefered
);
1591 if (prefered_lft
> valid_lft
) {
1592 if (net_ratelimit())
1593 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1597 in6_dev
= in6_dev_get(dev
);
1599 if (in6_dev
== NULL
) {
1600 if (net_ratelimit())
1601 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1606 * Two things going on here:
1607 * 1) Add routes for on-link prefixes
1608 * 2) Configure prefixes with the auto flag set
1611 /* Avoid arithmetic overflow. Really, we could
1612 save rt_expires in seconds, likely valid_lft,
1613 but it would require division in fib gc, that it
1616 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1617 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1619 rt_expires
= valid_lft
* HZ
;
1622 * We convert this (in jiffies) to clock_t later.
1623 * Avoid arithmetic overflow there as well.
1624 * Overflow can happen only if HZ < USER_HZ.
1626 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1627 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1629 if (pinfo
->onlink
) {
1630 struct rt6_info
*rt
;
1631 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1633 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1634 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1635 if (valid_lft
== 0) {
1636 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
1639 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1642 } else if (valid_lft
) {
1643 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1644 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1647 dst_release(&rt
->u
.dst
);
1650 /* Try to figure out our local address for this prefix */
1652 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1653 struct inet6_ifaddr
* ifp
;
1654 struct in6_addr addr
;
1655 int create
= 0, update_lft
= 0;
1657 if (pinfo
->prefix_len
== 64) {
1658 memcpy(&addr
, &pinfo
->prefix
, 8);
1659 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1660 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1661 in6_dev_put(in6_dev
);
1666 if (net_ratelimit())
1667 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1669 in6_dev_put(in6_dev
);
1674 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1676 if (ifp
== NULL
&& valid_lft
) {
1677 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1679 /* Do not allow to create too much of autoconfigured
1680 * addresses; this would be too easy way to crash kernel.
1682 if (!max_addresses
||
1683 ipv6_count_addresses(in6_dev
) < max_addresses
)
1684 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1685 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1687 if (!ifp
|| IS_ERR(ifp
)) {
1688 in6_dev_put(in6_dev
);
1692 update_lft
= create
= 1;
1693 ifp
->cstamp
= jiffies
;
1694 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1700 #ifdef CONFIG_IPV6_PRIVACY
1701 struct inet6_ifaddr
*ift
;
1705 /* update lifetime (RFC2462 5.5.3 e) */
1706 spin_lock(&ifp
->lock
);
1708 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1709 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1712 if (!update_lft
&& stored_lft
) {
1713 if (valid_lft
> MIN_VALID_LIFETIME
||
1714 valid_lft
> stored_lft
)
1716 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1717 /* valid_lft <= stored_lft is always true */
1721 valid_lft
= MIN_VALID_LIFETIME
;
1722 if (valid_lft
< prefered_lft
)
1723 prefered_lft
= valid_lft
;
1729 ifp
->valid_lft
= valid_lft
;
1730 ifp
->prefered_lft
= prefered_lft
;
1733 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1734 spin_unlock(&ifp
->lock
);
1736 if (!(flags
&IFA_F_TENTATIVE
))
1737 ipv6_ifa_notify(0, ifp
);
1739 spin_unlock(&ifp
->lock
);
1741 #ifdef CONFIG_IPV6_PRIVACY
1742 read_lock_bh(&in6_dev
->lock
);
1743 /* update all temporary addresses in the list */
1744 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1746 * When adjusting the lifetimes of an existing
1747 * temporary address, only lower the lifetimes.
1748 * Implementations must not increase the
1749 * lifetimes of an existing temporary address
1750 * when processing a Prefix Information Option.
1752 spin_lock(&ift
->lock
);
1754 if (ift
->valid_lft
> valid_lft
&&
1755 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1756 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1757 if (ift
->prefered_lft
> prefered_lft
&&
1758 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1759 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1760 spin_unlock(&ift
->lock
);
1761 if (!(flags
&IFA_F_TENTATIVE
))
1762 ipv6_ifa_notify(0, ift
);
1765 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1767 * When a new public address is created as described in [ADDRCONF],
1768 * also create a new temporary address.
1770 read_unlock_bh(&in6_dev
->lock
);
1771 ipv6_create_tempaddr(ifp
, NULL
);
1773 read_unlock_bh(&in6_dev
->lock
);
1780 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1781 in6_dev_put(in6_dev
);
1785 * Set destination address.
1786 * Special case for SIT interfaces where we create a new "virtual"
1789 int addrconf_set_dstaddr(void __user
*arg
)
1791 struct in6_ifreq ireq
;
1792 struct net_device
*dev
;
1798 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1801 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1807 if (dev
->type
== ARPHRD_SIT
) {
1810 struct ip_tunnel_parm p
;
1812 err
= -EADDRNOTAVAIL
;
1813 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1816 memset(&p
, 0, sizeof(p
));
1817 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1821 p
.iph
.protocol
= IPPROTO_IPV6
;
1823 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1825 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1826 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1831 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1833 err
= dev_open(dev
);
1843 * Manual configuration of address on an interface
1845 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
)
1847 struct inet6_ifaddr
*ifp
;
1848 struct inet6_dev
*idev
;
1849 struct net_device
*dev
;
1854 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1857 if (!(dev
->flags
&IFF_UP
))
1860 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1863 scope
= ipv6_addr_scope(pfx
);
1865 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, IFA_F_PERMANENT
);
1867 addrconf_dad_start(ifp
, 0);
1872 return PTR_ERR(ifp
);
1875 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1877 struct inet6_ifaddr
*ifp
;
1878 struct inet6_dev
*idev
;
1879 struct net_device
*dev
;
1881 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1884 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1887 read_lock_bh(&idev
->lock
);
1888 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1889 if (ifp
->prefix_len
== plen
&&
1890 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1892 read_unlock_bh(&idev
->lock
);
1896 /* If the last address is deleted administratively,
1897 disable IPv6 on this interface.
1899 if (idev
->addr_list
== NULL
)
1900 addrconf_ifdown(idev
->dev
, 1);
1904 read_unlock_bh(&idev
->lock
);
1905 return -EADDRNOTAVAIL
;
1909 int addrconf_add_ifaddr(void __user
*arg
)
1911 struct in6_ifreq ireq
;
1914 if (!capable(CAP_NET_ADMIN
))
1917 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1921 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1926 int addrconf_del_ifaddr(void __user
*arg
)
1928 struct in6_ifreq ireq
;
1931 if (!capable(CAP_NET_ADMIN
))
1934 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1938 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1943 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1945 struct inet6_ifaddr
* ifp
;
1946 struct in6_addr addr
;
1947 struct net_device
*dev
;
1952 memset(&addr
, 0, sizeof(struct in6_addr
));
1953 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1955 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1956 addr
.s6_addr32
[0] = htonl(0xfe800000);
1959 scope
= IPV6_ADDR_COMPATv4
;
1962 if (addr
.s6_addr32
[3]) {
1963 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1965 spin_lock_bh(&ifp
->lock
);
1966 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1967 spin_unlock_bh(&ifp
->lock
);
1968 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1974 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1975 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
1976 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1977 struct in_ifaddr
* ifa
;
1981 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
1984 addr
.s6_addr32
[3] = ifa
->ifa_local
;
1986 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
1988 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
1989 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1993 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1998 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2001 spin_lock_bh(&ifp
->lock
);
2002 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2003 spin_unlock_bh(&ifp
->lock
);
2004 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2012 static void init_loopback(struct net_device
*dev
)
2014 struct inet6_dev
*idev
;
2015 struct inet6_ifaddr
* ifp
;
2021 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2022 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2026 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2028 spin_lock_bh(&ifp
->lock
);
2029 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2030 spin_unlock_bh(&ifp
->lock
);
2031 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2036 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2038 struct inet6_ifaddr
* ifp
;
2040 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
2042 addrconf_dad_start(ifp
, 0);
2047 static void addrconf_dev_config(struct net_device
*dev
)
2049 struct in6_addr addr
;
2050 struct inet6_dev
* idev
;
2054 if ((dev
->type
!= ARPHRD_ETHER
) &&
2055 (dev
->type
!= ARPHRD_FDDI
) &&
2056 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2057 (dev
->type
!= ARPHRD_ARCNET
) &&
2058 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2059 /* Alas, we support only Ethernet autoconfiguration. */
2063 idev
= addrconf_add_dev(dev
);
2067 memset(&addr
, 0, sizeof(struct in6_addr
));
2068 addr
.s6_addr32
[0] = htonl(0xFE800000);
2070 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2071 addrconf_add_linklocal(idev
, &addr
);
2074 static void addrconf_sit_config(struct net_device
*dev
)
2076 struct inet6_dev
*idev
;
2081 * Configure the tunnel with one of our IPv4
2082 * addresses... we should configure all of
2083 * our v4 addrs in the tunnel
2086 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2087 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2091 sit_add_v4_addrs(idev
);
2093 if (dev
->flags
&IFF_POINTOPOINT
) {
2094 addrconf_add_mroute(dev
);
2095 addrconf_add_lroute(dev
);
2101 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2103 struct in6_addr lladdr
;
2105 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
2106 addrconf_add_linklocal(idev
, &lladdr
);
2112 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2114 struct net_device
*link_dev
;
2116 /* first try to inherit the link-local address from the link device */
2117 if (idev
->dev
->iflink
&&
2118 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2119 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2122 /* then try to inherit it from any device */
2123 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2124 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2127 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2131 * Autoconfigure tunnel with a link-local address so routing protocols,
2132 * DHCPv6, MLD etc. can be run over the virtual link
2135 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2137 struct inet6_dev
*idev
;
2141 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2142 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2145 ip6_tnl_add_linklocal(idev
);
2146 addrconf_add_mroute(dev
);
2149 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2152 struct net_device
*dev
= (struct net_device
*) data
;
2153 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2154 int run_pending
= 0;
2159 if (event
== NETDEV_UP
) {
2160 if (!netif_carrier_ok(dev
)) {
2161 /* device is not ready yet. */
2163 "ADDRCONF(NETDEV_UP): %s: "
2164 "link is not ready\n",
2169 if (!netif_carrier_ok(dev
)) {
2170 /* device is still not ready. */
2175 if (idev
->if_flags
& IF_READY
) {
2176 /* device is already configured. */
2179 idev
->if_flags
|= IF_READY
;
2183 "ADDRCONF(NETDEV_CHANGE): %s: "
2184 "link becomes ready\n",
2192 addrconf_sit_config(dev
);
2194 case ARPHRD_TUNNEL6
:
2195 addrconf_ip6_tnl_config(dev
);
2197 case ARPHRD_LOOPBACK
:
2202 addrconf_dev_config(dev
);
2207 addrconf_dad_run(idev
);
2209 /* If the MTU changed during the interface down, when the
2210 interface up, the changed MTU must be reflected in the
2211 idev as well as routers.
2213 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2214 rt6_mtu_change(dev
, dev
->mtu
);
2215 idev
->cnf
.mtu6
= dev
->mtu
;
2217 idev
->tstamp
= jiffies
;
2218 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2219 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2220 stop IPv6 on this interface.
2222 if (dev
->mtu
< IPV6_MIN_MTU
)
2223 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2227 case NETDEV_CHANGEMTU
:
2228 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2229 rt6_mtu_change(dev
, dev
->mtu
);
2230 idev
->cnf
.mtu6
= dev
->mtu
;
2234 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2237 case NETDEV_UNREGISTER
:
2239 * Remove all addresses from this interface.
2241 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2244 case NETDEV_CHANGENAME
:
2245 #ifdef CONFIG_SYSCTL
2247 addrconf_sysctl_unregister(&idev
->cnf
);
2248 neigh_sysctl_unregister(idev
->nd_parms
);
2249 neigh_sysctl_register(dev
, idev
->nd_parms
,
2250 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2251 &ndisc_ifinfo_sysctl_change
,
2253 addrconf_sysctl_register(idev
, &idev
->cnf
);
2263 * addrconf module should be notified of a device going up
2265 static struct notifier_block ipv6_dev_notf
= {
2266 .notifier_call
= addrconf_notify
,
2270 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2272 struct inet6_dev
*idev
;
2273 struct inet6_ifaddr
*ifa
, **bifa
;
2278 if (dev
== &loopback_dev
&& how
== 1)
2282 neigh_ifdown(&nd_tbl
, dev
);
2284 idev
= __in6_dev_get(dev
);
2288 /* Step 1: remove reference to ipv6 device from parent device.
2292 write_lock_bh(&addrconf_lock
);
2293 dev
->ip6_ptr
= NULL
;
2295 write_unlock_bh(&addrconf_lock
);
2297 /* Step 1.5: remove snmp6 entry */
2298 snmp6_unregister_dev(idev
);
2302 /* Step 2: clear hash table */
2303 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2304 bifa
= &inet6_addr_lst
[i
];
2306 write_lock_bh(&addrconf_hash_lock
);
2307 while ((ifa
= *bifa
) != NULL
) {
2308 if (ifa
->idev
== idev
) {
2309 *bifa
= ifa
->lst_next
;
2310 ifa
->lst_next
= NULL
;
2311 addrconf_del_timer(ifa
);
2315 bifa
= &ifa
->lst_next
;
2317 write_unlock_bh(&addrconf_hash_lock
);
2320 write_lock_bh(&idev
->lock
);
2322 /* Step 3: clear flags for stateless addrconf */
2324 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2326 /* Step 4: clear address list */
2327 #ifdef CONFIG_IPV6_PRIVACY
2328 if (how
== 1 && del_timer(&idev
->regen_timer
))
2331 /* clear tempaddr list */
2332 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2333 idev
->tempaddr_list
= ifa
->tmp_next
;
2334 ifa
->tmp_next
= NULL
;
2336 write_unlock_bh(&idev
->lock
);
2337 spin_lock_bh(&ifa
->lock
);
2340 in6_ifa_put(ifa
->ifpub
);
2343 spin_unlock_bh(&ifa
->lock
);
2345 write_lock_bh(&idev
->lock
);
2348 while ((ifa
= idev
->addr_list
) != NULL
) {
2349 idev
->addr_list
= ifa
->if_next
;
2350 ifa
->if_next
= NULL
;
2352 addrconf_del_timer(ifa
);
2353 write_unlock_bh(&idev
->lock
);
2355 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2358 write_lock_bh(&idev
->lock
);
2360 write_unlock_bh(&idev
->lock
);
2362 /* Step 5: Discard multicast list */
2365 ipv6_mc_destroy_dev(idev
);
2369 /* Step 5: netlink notification of this interface */
2370 idev
->tstamp
= jiffies
;
2371 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2373 /* Shot the device (if unregistered) */
2376 #ifdef CONFIG_SYSCTL
2377 addrconf_sysctl_unregister(&idev
->cnf
);
2378 neigh_sysctl_unregister(idev
->nd_parms
);
2380 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2381 neigh_ifdown(&nd_tbl
, dev
);
2387 static void addrconf_rs_timer(unsigned long data
)
2389 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2391 if (ifp
->idev
->cnf
.forwarding
)
2394 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2396 * Announcement received after solicitation
2402 spin_lock(&ifp
->lock
);
2403 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2404 struct in6_addr all_routers
;
2406 /* The wait after the last probe can be shorter */
2407 addrconf_mod_timer(ifp
, AC_RS
,
2408 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2409 ifp
->idev
->cnf
.rtr_solicit_delay
:
2410 ifp
->idev
->cnf
.rtr_solicit_interval
);
2411 spin_unlock(&ifp
->lock
);
2413 ipv6_addr_all_routers(&all_routers
);
2415 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2417 spin_unlock(&ifp
->lock
);
2419 * Note: we do not support deprecated "all on-link"
2420 * assumption any longer.
2422 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2423 ifp
->idev
->dev
->name
);
2431 * Duplicate Address Detection
2433 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2435 unsigned long rand_num
;
2436 struct inet6_dev
*idev
= ifp
->idev
;
2438 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2439 ifp
->probes
= idev
->cnf
.dad_transmits
;
2440 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2443 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2445 struct inet6_dev
*idev
= ifp
->idev
;
2446 struct net_device
*dev
= idev
->dev
;
2448 addrconf_join_solict(dev
, &ifp
->addr
);
2450 if (ifp
->prefix_len
!= 128 && (ifp
->flags
&IFA_F_PERMANENT
))
2451 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
, 0,
2454 net_srandom(ifp
->addr
.s6_addr32
[3]);
2456 read_lock_bh(&idev
->lock
);
2459 spin_lock_bh(&ifp
->lock
);
2461 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2462 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2463 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2464 spin_unlock_bh(&ifp
->lock
);
2465 read_unlock_bh(&idev
->lock
);
2467 addrconf_dad_completed(ifp
);
2471 if (!(idev
->if_flags
& IF_READY
)) {
2472 spin_unlock_bh(&ifp
->lock
);
2473 read_unlock_bh(&idev
->lock
);
2475 * If the defice is not ready:
2476 * - keep it tentative if it is a permanent address.
2477 * - otherwise, kill it.
2480 addrconf_dad_stop(ifp
);
2483 addrconf_dad_kick(ifp
);
2484 spin_unlock_bh(&ifp
->lock
);
2486 read_unlock_bh(&idev
->lock
);
2489 static void addrconf_dad_timer(unsigned long data
)
2491 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2492 struct inet6_dev
*idev
= ifp
->idev
;
2493 struct in6_addr unspec
;
2494 struct in6_addr mcaddr
;
2496 read_lock_bh(&idev
->lock
);
2498 read_unlock_bh(&idev
->lock
);
2501 spin_lock_bh(&ifp
->lock
);
2502 if (ifp
->probes
== 0) {
2504 * DAD was successful
2507 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2508 spin_unlock_bh(&ifp
->lock
);
2509 read_unlock_bh(&idev
->lock
);
2511 addrconf_dad_completed(ifp
);
2517 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2518 spin_unlock_bh(&ifp
->lock
);
2519 read_unlock_bh(&idev
->lock
);
2521 /* send a neighbour solicitation for our addr */
2522 memset(&unspec
, 0, sizeof(unspec
));
2523 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2524 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2529 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2531 struct net_device
* dev
= ifp
->idev
->dev
;
2534 * Configure the address for reception. Now it is valid.
2537 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2539 /* If added prefix is link local and forwarding is off,
2540 start sending router solicitations.
2543 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2544 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2545 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2546 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2547 struct in6_addr all_routers
;
2549 ipv6_addr_all_routers(&all_routers
);
2552 * If a host as already performed a random delay
2553 * [...] as part of DAD [...] there is no need
2554 * to delay again before sending the first RS
2556 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2558 spin_lock_bh(&ifp
->lock
);
2560 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2561 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2562 spin_unlock_bh(&ifp
->lock
);
2566 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2567 struct inet6_ifaddr
*ifp
;
2569 read_lock_bh(&idev
->lock
);
2570 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2571 spin_lock_bh(&ifp
->lock
);
2572 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2573 spin_unlock_bh(&ifp
->lock
);
2576 spin_unlock_bh(&ifp
->lock
);
2577 addrconf_dad_kick(ifp
);
2579 read_unlock_bh(&idev
->lock
);
2582 #ifdef CONFIG_PROC_FS
2583 struct if6_iter_state
{
2587 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2589 struct inet6_ifaddr
*ifa
= NULL
;
2590 struct if6_iter_state
*state
= seq
->private;
2592 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2593 ifa
= inet6_addr_lst
[state
->bucket
];
2600 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2602 struct if6_iter_state
*state
= seq
->private;
2604 ifa
= ifa
->lst_next
;
2606 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2607 ifa
= inet6_addr_lst
[state
->bucket
];
2613 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2615 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2618 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2620 return pos
? NULL
: ifa
;
2623 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2625 read_lock_bh(&addrconf_hash_lock
);
2626 return if6_get_idx(seq
, *pos
);
2629 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2631 struct inet6_ifaddr
*ifa
;
2633 ifa
= if6_get_next(seq
, v
);
2638 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2640 read_unlock_bh(&addrconf_hash_lock
);
2643 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2645 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2647 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2649 ifp
->idev
->dev
->ifindex
,
2653 ifp
->idev
->dev
->name
);
2657 static struct seq_operations if6_seq_ops
= {
2658 .start
= if6_seq_start
,
2659 .next
= if6_seq_next
,
2660 .show
= if6_seq_show
,
2661 .stop
= if6_seq_stop
,
2664 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2666 struct seq_file
*seq
;
2668 struct if6_iter_state
*s
= kmalloc(sizeof(*s
), GFP_KERNEL
);
2672 memset(s
, 0, sizeof(*s
));
2674 rc
= seq_open(file
, &if6_seq_ops
);
2678 seq
= file
->private_data
;
2687 static struct file_operations if6_fops
= {
2688 .owner
= THIS_MODULE
,
2689 .open
= if6_seq_open
,
2691 .llseek
= seq_lseek
,
2692 .release
= seq_release_private
,
2695 int __init
if6_proc_init(void)
2697 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2702 void if6_proc_exit(void)
2704 proc_net_remove("if_inet6");
2706 #endif /* CONFIG_PROC_FS */
2709 * Periodic address status verification
2712 static void addrconf_verify(unsigned long foo
)
2714 struct inet6_ifaddr
*ifp
;
2715 unsigned long now
, next
;
2718 spin_lock_bh(&addrconf_verify_lock
);
2720 next
= now
+ ADDR_CHECK_FREQUENCY
;
2722 del_timer(&addr_chk_timer
);
2724 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2727 read_lock(&addrconf_hash_lock
);
2728 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2730 #ifdef CONFIG_IPV6_PRIVACY
2731 unsigned long regen_advance
;
2734 if (ifp
->flags
& IFA_F_PERMANENT
)
2737 spin_lock(&ifp
->lock
);
2738 age
= (now
- ifp
->tstamp
) / HZ
;
2740 #ifdef CONFIG_IPV6_PRIVACY
2741 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2742 ifp
->idev
->cnf
.dad_transmits
*
2743 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2746 if (age
>= ifp
->valid_lft
) {
2747 spin_unlock(&ifp
->lock
);
2749 read_unlock(&addrconf_hash_lock
);
2752 } else if (age
>= ifp
->prefered_lft
) {
2753 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2756 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2758 ifp
->flags
|= IFA_F_DEPRECATED
;
2761 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2762 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2764 spin_unlock(&ifp
->lock
);
2768 read_unlock(&addrconf_hash_lock
);
2770 ipv6_ifa_notify(0, ifp
);
2774 #ifdef CONFIG_IPV6_PRIVACY
2775 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2776 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2777 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2778 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2779 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2780 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2781 if (!ifp
->regen_count
&& ifpub
) {
2784 in6_ifa_hold(ifpub
);
2785 spin_unlock(&ifp
->lock
);
2786 read_unlock(&addrconf_hash_lock
);
2787 spin_lock(&ifpub
->lock
);
2788 ifpub
->regen_count
= 0;
2789 spin_unlock(&ifpub
->lock
);
2790 ipv6_create_tempaddr(ifpub
, ifp
);
2795 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2796 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2797 spin_unlock(&ifp
->lock
);
2800 /* ifp->prefered_lft <= ifp->valid_lft */
2801 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2802 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2803 spin_unlock(&ifp
->lock
);
2806 read_unlock(&addrconf_hash_lock
);
2809 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2810 add_timer(&addr_chk_timer
);
2811 spin_unlock_bh(&addrconf_verify_lock
);
2815 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2817 struct rtattr
**rta
= arg
;
2818 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2819 struct in6_addr
*pfx
;
2822 if (rta
[IFA_ADDRESS
-1]) {
2823 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2825 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2827 if (rta
[IFA_LOCAL
-1]) {
2828 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2830 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2835 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2839 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2841 struct rtattr
**rta
= arg
;
2842 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2843 struct in6_addr
*pfx
;
2846 if (rta
[IFA_ADDRESS
-1]) {
2847 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2849 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2851 if (rta
[IFA_LOCAL
-1]) {
2852 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2854 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2859 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2862 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
2863 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2865 struct ifaddrmsg
*ifm
;
2866 struct nlmsghdr
*nlh
;
2867 struct ifa_cacheinfo ci
;
2868 unsigned char *b
= skb
->tail
;
2870 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2871 ifm
= NLMSG_DATA(nlh
);
2872 ifm
->ifa_family
= AF_INET6
;
2873 ifm
->ifa_prefixlen
= ifa
->prefix_len
;
2874 ifm
->ifa_flags
= ifa
->flags
;
2875 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2876 if (ifa
->scope
&IFA_HOST
)
2877 ifm
->ifa_scope
= RT_SCOPE_HOST
;
2878 else if (ifa
->scope
&IFA_LINK
)
2879 ifm
->ifa_scope
= RT_SCOPE_LINK
;
2880 else if (ifa
->scope
&IFA_SITE
)
2881 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2882 ifm
->ifa_index
= ifa
->idev
->dev
->ifindex
;
2883 RTA_PUT(skb
, IFA_ADDRESS
, 16, &ifa
->addr
);
2884 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
2885 ci
.ifa_prefered
= ifa
->prefered_lft
;
2886 ci
.ifa_valid
= ifa
->valid_lft
;
2887 if (ci
.ifa_prefered
!= INFINITY_LIFE_TIME
) {
2888 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
2889 ci
.ifa_prefered
-= tval
;
2890 if (ci
.ifa_valid
!= INFINITY_LIFE_TIME
)
2891 ci
.ifa_valid
-= tval
;
2894 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2895 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2897 ci
.cstamp
= (__u32
)(TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) / HZ
* 100
2898 + TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2899 ci
.tstamp
= (__u32
)(TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2900 + TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2901 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2902 nlh
->nlmsg_len
= skb
->tail
- b
;
2907 skb_trim(skb
, b
- skb
->data
);
2911 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
2912 u32 pid
, u32 seq
, int event
, u16 flags
)
2914 struct ifaddrmsg
*ifm
;
2915 struct nlmsghdr
*nlh
;
2916 struct ifa_cacheinfo ci
;
2917 unsigned char *b
= skb
->tail
;
2919 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2920 ifm
= NLMSG_DATA(nlh
);
2921 ifm
->ifa_family
= AF_INET6
;
2922 ifm
->ifa_prefixlen
= 128;
2923 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2924 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2925 if (ipv6_addr_scope(&ifmca
->mca_addr
)&IFA_SITE
)
2926 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2927 ifm
->ifa_index
= ifmca
->idev
->dev
->ifindex
;
2928 RTA_PUT(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
);
2929 ci
.cstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) / HZ
2930 * 100 + TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) % HZ
2932 ci
.tstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) / HZ
2933 * 100 + TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) % HZ
2935 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2936 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2937 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2938 nlh
->nlmsg_len
= skb
->tail
- b
;
2943 skb_trim(skb
, b
- skb
->data
);
2947 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
2948 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2950 struct ifaddrmsg
*ifm
;
2951 struct nlmsghdr
*nlh
;
2952 struct ifa_cacheinfo ci
;
2953 unsigned char *b
= skb
->tail
;
2955 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2956 ifm
= NLMSG_DATA(nlh
);
2957 ifm
->ifa_family
= AF_INET6
;
2958 ifm
->ifa_prefixlen
= 128;
2959 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2960 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2961 if (ipv6_addr_scope(&ifaca
->aca_addr
)&IFA_SITE
)
2962 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2963 ifm
->ifa_index
= ifaca
->aca_idev
->dev
->ifindex
;
2964 RTA_PUT(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
);
2965 ci
.cstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) / HZ
2966 * 100 + TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) % HZ
2968 ci
.tstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) / HZ
2969 * 100 + TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) % HZ
2971 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2972 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2973 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2974 nlh
->nlmsg_len
= skb
->tail
- b
;
2979 skb_trim(skb
, b
- skb
->data
);
2990 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
2991 enum addr_type_t type
)
2994 int s_idx
, s_ip_idx
;
2996 struct net_device
*dev
;
2997 struct inet6_dev
*idev
= NULL
;
2998 struct inet6_ifaddr
*ifa
;
2999 struct ifmcaddr6
*ifmca
;
3000 struct ifacaddr6
*ifaca
;
3002 s_idx
= cb
->args
[0];
3003 s_ip_idx
= ip_idx
= cb
->args
[1];
3004 read_lock(&dev_base_lock
);
3006 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
3012 if ((idev
= in6_dev_get(dev
)) == NULL
)
3014 read_lock_bh(&idev
->lock
);
3017 /* unicast address incl. temp addr */
3018 for (ifa
= idev
->addr_list
; ifa
;
3019 ifa
= ifa
->if_next
, ip_idx
++) {
3020 if (ip_idx
< s_ip_idx
)
3022 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3023 NETLINK_CB(cb
->skb
).pid
,
3024 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3029 case MULTICAST_ADDR
:
3030 /* multicast address */
3031 for (ifmca
= idev
->mc_list
; ifmca
;
3032 ifmca
= ifmca
->next
, ip_idx
++) {
3033 if (ip_idx
< s_ip_idx
)
3035 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3036 NETLINK_CB(cb
->skb
).pid
,
3037 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3043 /* anycast address */
3044 for (ifaca
= idev
->ac_list
; ifaca
;
3045 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3046 if (ip_idx
< s_ip_idx
)
3048 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3049 NETLINK_CB(cb
->skb
).pid
,
3050 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3058 read_unlock_bh(&idev
->lock
);
3063 read_unlock_bh(&idev
->lock
);
3066 read_unlock(&dev_base_lock
);
3068 cb
->args
[1] = ip_idx
;
3072 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3074 enum addr_type_t type
= UNICAST_ADDR
;
3075 return inet6_dump_addr(skb
, cb
, type
);
3078 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3080 enum addr_type_t type
= MULTICAST_ADDR
;
3081 return inet6_dump_addr(skb
, cb
, type
);
3085 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3087 enum addr_type_t type
= ANYCAST_ADDR
;
3088 return inet6_dump_addr(skb
, cb
, type
);
3091 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3093 struct sk_buff
*skb
;
3094 int size
= NLMSG_SPACE(sizeof(struct ifaddrmsg
)+128);
3096 skb
= alloc_skb(size
, GFP_ATOMIC
);
3098 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, ENOBUFS
);
3101 if (inet6_fill_ifaddr(skb
, ifa
, current
->pid
, 0, event
, 0) < 0) {
3103 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, EINVAL
);
3106 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFADDR
;
3107 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFADDR
, GFP_ATOMIC
);
3110 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3111 __s32
*array
, int bytes
)
3113 memset(array
, 0, bytes
);
3114 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3115 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3116 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3117 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3118 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3119 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3120 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3121 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3122 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3123 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3124 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3125 #ifdef CONFIG_IPV6_PRIVACY
3126 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3127 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3128 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3129 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3130 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3132 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3135 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3136 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3138 struct net_device
*dev
= idev
->dev
;
3139 __s32
*array
= NULL
;
3140 struct ifinfomsg
*r
;
3141 struct nlmsghdr
*nlh
;
3142 unsigned char *b
= skb
->tail
;
3143 struct rtattr
*subattr
;
3144 __u32 mtu
= dev
->mtu
;
3145 struct ifla_cacheinfo ci
;
3147 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*r
), flags
);
3148 r
= NLMSG_DATA(nlh
);
3149 r
->ifi_family
= AF_INET6
;
3151 r
->ifi_type
= dev
->type
;
3152 r
->ifi_index
= dev
->ifindex
;
3153 r
->ifi_flags
= dev_get_flags(dev
);
3156 RTA_PUT(skb
, IFLA_IFNAME
, strlen(dev
->name
)+1, dev
->name
);
3159 RTA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3161 RTA_PUT(skb
, IFLA_MTU
, sizeof(mtu
), &mtu
);
3162 if (dev
->ifindex
!= dev
->iflink
)
3163 RTA_PUT(skb
, IFLA_LINK
, sizeof(int), &dev
->iflink
);
3165 subattr
= (struct rtattr
*)skb
->tail
;
3167 RTA_PUT(skb
, IFLA_PROTINFO
, 0, NULL
);
3169 /* return the device flags */
3170 RTA_PUT(skb
, IFLA_INET6_FLAGS
, sizeof(__u32
), &idev
->if_flags
);
3172 /* return interface cacheinfo */
3173 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3174 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3175 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3176 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3177 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3178 RTA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3180 /* return the device sysctl params */
3181 if ((array
= kmalloc(DEVCONF_MAX
* sizeof(*array
), GFP_ATOMIC
)) == NULL
)
3182 goto rtattr_failure
;
3183 ipv6_store_devconf(&idev
->cnf
, array
, DEVCONF_MAX
* sizeof(*array
));
3184 RTA_PUT(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(*array
), array
);
3186 /* XXX - Statistics/MC not implemented */
3187 subattr
->rta_len
= skb
->tail
- (u8
*)subattr
;
3189 nlh
->nlmsg_len
= skb
->tail
- b
;
3196 skb_trim(skb
, b
- skb
->data
);
3200 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3203 int s_idx
= cb
->args
[0];
3204 struct net_device
*dev
;
3205 struct inet6_dev
*idev
;
3207 read_lock(&dev_base_lock
);
3208 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3211 if ((idev
= in6_dev_get(dev
)) == NULL
)
3213 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3214 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3219 read_unlock(&dev_base_lock
);
3225 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3227 struct sk_buff
*skb
;
3229 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
)+128);
3231 skb
= alloc_skb(size
, GFP_ATOMIC
);
3233 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, ENOBUFS
);
3236 if (inet6_fill_ifinfo(skb
, idev
, current
->pid
, 0, event
, 0) < 0) {
3238 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, EINVAL
);
3241 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFINFO
;
3242 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFINFO
, GFP_ATOMIC
);
3245 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3246 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3247 int event
, unsigned int flags
)
3249 struct prefixmsg
*pmsg
;
3250 struct nlmsghdr
*nlh
;
3251 unsigned char *b
= skb
->tail
;
3252 struct prefix_cacheinfo ci
;
3254 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3255 pmsg
= NLMSG_DATA(nlh
);
3256 pmsg
->prefix_family
= AF_INET6
;
3257 pmsg
->prefix_pad1
= 0;
3258 pmsg
->prefix_pad2
= 0;
3259 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3260 pmsg
->prefix_len
= pinfo
->prefix_len
;
3261 pmsg
->prefix_type
= pinfo
->type
;
3262 pmsg
->prefix_pad3
= 0;
3264 pmsg
->prefix_flags
= 0;
3266 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3267 if (pinfo
->autoconf
)
3268 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3270 RTA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3272 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3273 ci
.valid_time
= ntohl(pinfo
->valid
);
3274 RTA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3276 nlh
->nlmsg_len
= skb
->tail
- b
;
3281 skb_trim(skb
, b
- skb
->data
);
3285 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3286 struct prefix_info
*pinfo
)
3288 struct sk_buff
*skb
;
3289 int size
= NLMSG_SPACE(sizeof(struct prefixmsg
)+128);
3291 skb
= alloc_skb(size
, GFP_ATOMIC
);
3293 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, ENOBUFS
);
3296 if (inet6_fill_prefix(skb
, idev
, pinfo
, current
->pid
, 0, event
, 0) < 0) {
3298 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, EINVAL
);
3301 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_PREFIX
;
3302 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_PREFIX
, GFP_ATOMIC
);
3305 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3306 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3307 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3308 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3309 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= inet6_dump_ifaddr
, },
3310 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3311 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3312 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3313 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3314 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3315 .dumpit
= inet6_dump_fib
, },
3318 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3320 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3324 dst_hold(&ifp
->rt
->u
.dst
);
3325 if (ip6_ins_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3326 dst_release(&ifp
->rt
->u
.dst
);
3327 if (ifp
->idev
->cnf
.forwarding
)
3328 addrconf_join_anycast(ifp
);
3331 if (ifp
->idev
->cnf
.forwarding
)
3332 addrconf_leave_anycast(ifp
);
3333 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3334 dst_hold(&ifp
->rt
->u
.dst
);
3335 if (ip6_del_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3336 dst_free(&ifp
->rt
->u
.dst
);
3338 dst_release(&ifp
->rt
->u
.dst
);
3343 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3345 read_lock_bh(&addrconf_lock
);
3346 if (likely(ifp
->idev
->dead
== 0))
3347 __ipv6_ifa_notify(event
, ifp
);
3348 read_unlock_bh(&addrconf_lock
);
3351 #ifdef CONFIG_SYSCTL
3354 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3355 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3357 int *valp
= ctl
->data
;
3361 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3363 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3364 if (valp
!= &ipv6_devconf
.forwarding
) {
3365 if ((!*valp
) ^ (!val
)) {
3366 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3369 dev_forward_change(idev
);
3372 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3373 addrconf_forward_change();
3376 rt6_purge_dflt_routers();
3382 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3383 int __user
*name
, int nlen
,
3384 void __user
*oldval
,
3385 size_t __user
*oldlenp
,
3386 void __user
*newval
, size_t newlen
,
3389 int *valp
= table
->data
;
3392 if (!newval
|| !newlen
)
3394 if (newlen
!= sizeof(int))
3396 if (get_user(new, (int __user
*)newval
))
3400 if (oldval
&& oldlenp
) {
3402 if (get_user(len
, oldlenp
))
3405 if (len
> table
->maxlen
)
3406 len
= table
->maxlen
;
3407 if (copy_to_user(oldval
, valp
, len
))
3409 if (put_user(len
, oldlenp
))
3414 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3415 if (valp
!= &ipv6_devconf
.forwarding
) {
3416 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3418 if (unlikely(idev
== NULL
))
3420 changed
= (!*valp
) ^ (!new);
3423 dev_forward_change(idev
);
3426 addrconf_forward_change();
3430 rt6_purge_dflt_routers();
3437 static struct addrconf_sysctl_table
3439 struct ctl_table_header
*sysctl_header
;
3440 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3441 ctl_table addrconf_dev
[2];
3442 ctl_table addrconf_conf_dir
[2];
3443 ctl_table addrconf_proto_dir
[2];
3444 ctl_table addrconf_root_dir
[2];
3445 } addrconf_sysctl
= {
3446 .sysctl_header
= NULL
,
3449 .ctl_name
= NET_IPV6_FORWARDING
,
3450 .procname
= "forwarding",
3451 .data
= &ipv6_devconf
.forwarding
,
3452 .maxlen
= sizeof(int),
3454 .proc_handler
= &addrconf_sysctl_forward
,
3455 .strategy
= &addrconf_sysctl_forward_strategy
,
3458 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3459 .procname
= "hop_limit",
3460 .data
= &ipv6_devconf
.hop_limit
,
3461 .maxlen
= sizeof(int),
3463 .proc_handler
= proc_dointvec
,
3466 .ctl_name
= NET_IPV6_MTU
,
3468 .data
= &ipv6_devconf
.mtu6
,
3469 .maxlen
= sizeof(int),
3471 .proc_handler
= &proc_dointvec
,
3474 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3475 .procname
= "accept_ra",
3476 .data
= &ipv6_devconf
.accept_ra
,
3477 .maxlen
= sizeof(int),
3479 .proc_handler
= &proc_dointvec
,
3482 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3483 .procname
= "accept_redirects",
3484 .data
= &ipv6_devconf
.accept_redirects
,
3485 .maxlen
= sizeof(int),
3487 .proc_handler
= &proc_dointvec
,
3490 .ctl_name
= NET_IPV6_AUTOCONF
,
3491 .procname
= "autoconf",
3492 .data
= &ipv6_devconf
.autoconf
,
3493 .maxlen
= sizeof(int),
3495 .proc_handler
= &proc_dointvec
,
3498 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3499 .procname
= "dad_transmits",
3500 .data
= &ipv6_devconf
.dad_transmits
,
3501 .maxlen
= sizeof(int),
3503 .proc_handler
= &proc_dointvec
,
3506 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3507 .procname
= "router_solicitations",
3508 .data
= &ipv6_devconf
.rtr_solicits
,
3509 .maxlen
= sizeof(int),
3511 .proc_handler
= &proc_dointvec
,
3514 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3515 .procname
= "router_solicitation_interval",
3516 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3517 .maxlen
= sizeof(int),
3519 .proc_handler
= &proc_dointvec_jiffies
,
3520 .strategy
= &sysctl_jiffies
,
3523 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3524 .procname
= "router_solicitation_delay",
3525 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3526 .maxlen
= sizeof(int),
3528 .proc_handler
= &proc_dointvec_jiffies
,
3529 .strategy
= &sysctl_jiffies
,
3532 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3533 .procname
= "force_mld_version",
3534 .data
= &ipv6_devconf
.force_mld_version
,
3535 .maxlen
= sizeof(int),
3537 .proc_handler
= &proc_dointvec
,
3539 #ifdef CONFIG_IPV6_PRIVACY
3541 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3542 .procname
= "use_tempaddr",
3543 .data
= &ipv6_devconf
.use_tempaddr
,
3544 .maxlen
= sizeof(int),
3546 .proc_handler
= &proc_dointvec
,
3549 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3550 .procname
= "temp_valid_lft",
3551 .data
= &ipv6_devconf
.temp_valid_lft
,
3552 .maxlen
= sizeof(int),
3554 .proc_handler
= &proc_dointvec
,
3557 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3558 .procname
= "temp_prefered_lft",
3559 .data
= &ipv6_devconf
.temp_prefered_lft
,
3560 .maxlen
= sizeof(int),
3562 .proc_handler
= &proc_dointvec
,
3565 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3566 .procname
= "regen_max_retry",
3567 .data
= &ipv6_devconf
.regen_max_retry
,
3568 .maxlen
= sizeof(int),
3570 .proc_handler
= &proc_dointvec
,
3573 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3574 .procname
= "max_desync_factor",
3575 .data
= &ipv6_devconf
.max_desync_factor
,
3576 .maxlen
= sizeof(int),
3578 .proc_handler
= &proc_dointvec
,
3582 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3583 .procname
= "max_addresses",
3584 .data
= &ipv6_devconf
.max_addresses
,
3585 .maxlen
= sizeof(int),
3587 .proc_handler
= &proc_dointvec
,
3590 .ctl_name
= 0, /* sentinel */
3595 .ctl_name
= NET_PROTO_CONF_ALL
,
3598 .child
= addrconf_sysctl
.addrconf_vars
,
3601 .ctl_name
= 0, /* sentinel */
3604 .addrconf_conf_dir
= {
3606 .ctl_name
= NET_IPV6_CONF
,
3609 .child
= addrconf_sysctl
.addrconf_dev
,
3612 .ctl_name
= 0, /* sentinel */
3615 .addrconf_proto_dir
= {
3617 .ctl_name
= NET_IPV6
,
3620 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3623 .ctl_name
= 0, /* sentinel */
3626 .addrconf_root_dir
= {
3628 .ctl_name
= CTL_NET
,
3631 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3634 .ctl_name
= 0, /* sentinel */
3639 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3642 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3643 struct addrconf_sysctl_table
*t
;
3644 char *dev_name
= NULL
;
3646 t
= kmalloc(sizeof(*t
), GFP_KERNEL
);
3649 memcpy(t
, &addrconf_sysctl
, sizeof(*t
));
3650 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3651 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3652 t
->addrconf_vars
[i
].de
= NULL
;
3653 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3656 dev_name
= dev
->name
;
3657 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3659 dev_name
= "default";
3660 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3664 * Make a copy of dev_name, because '.procname' is regarded as const
3665 * by sysctl and we wouldn't want anyone to change it under our feet
3666 * (see SIOCSIFNAME).
3668 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3672 t
->addrconf_dev
[0].procname
= dev_name
;
3674 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3675 t
->addrconf_dev
[0].de
= NULL
;
3676 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3677 t
->addrconf_conf_dir
[0].de
= NULL
;
3678 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3679 t
->addrconf_proto_dir
[0].de
= NULL
;
3680 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3681 t
->addrconf_root_dir
[0].de
= NULL
;
3683 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
, 0);
3684 if (t
->sysctl_header
== NULL
)
3699 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3702 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3704 unregister_sysctl_table(t
->sysctl_header
);
3705 kfree(t
->addrconf_dev
[0].procname
);
3717 int register_inet6addr_notifier(struct notifier_block
*nb
)
3719 return notifier_chain_register(&inet6addr_chain
, nb
);
3722 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
3724 return notifier_chain_unregister(&inet6addr_chain
,nb
);
3728 * Init / cleanup code
3731 int __init
addrconf_init(void)
3735 /* The addrconf netdev notifier requires that loopback_dev
3736 * has it's ipv6 private information allocated and setup
3737 * before it can bring up and give link-local addresses
3738 * to other devices which are up.
3740 * Unfortunately, loopback_dev is not necessarily the first
3741 * entry in the global dev_base list of net devices. In fact,
3742 * it is likely to be the very last entry on that list.
3743 * So this causes the notifier registry below to try and
3744 * give link-local addresses to all devices besides loopback_dev
3745 * first, then loopback_dev, which cases all the non-loopback_dev
3746 * devices to fail to get a link-local address.
3748 * So, as a temporary fix, allocate the ipv6 structure for
3749 * loopback_dev first by hand.
3750 * Longer term, all of the dependencies ipv6 has upon the loopback
3751 * device and it being up should be removed.
3754 if (!ipv6_add_dev(&loopback_dev
))
3760 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
3762 register_netdevice_notifier(&ipv6_dev_notf
);
3764 #ifdef CONFIG_IPV6_PRIVACY
3765 md5_tfm
= crypto_alloc_tfm("md5", 0);
3766 if (unlikely(md5_tfm
== NULL
))
3768 "failed to load transform for md5\n");
3772 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
3773 #ifdef CONFIG_SYSCTL
3774 addrconf_sysctl
.sysctl_header
=
3775 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
, 0);
3776 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
3782 void __exit
addrconf_cleanup(void)
3784 struct net_device
*dev
;
3785 struct inet6_dev
*idev
;
3786 struct inet6_ifaddr
*ifa
;
3789 unregister_netdevice_notifier(&ipv6_dev_notf
);
3791 rtnetlink_links
[PF_INET6
] = NULL
;
3792 #ifdef CONFIG_SYSCTL
3793 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
3794 addrconf_sysctl_unregister(&ipv6_devconf
);
3803 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
3804 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3806 addrconf_ifdown(dev
, 1);
3808 addrconf_ifdown(&loopback_dev
, 2);
3814 write_lock_bh(&addrconf_hash_lock
);
3815 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3816 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
3817 struct inet6_ifaddr
*bifa
;
3820 ifa
= ifa
->lst_next
;
3821 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
3822 /* Do not free it; something is wrong.
3823 Now we can investigate it with debugger.
3827 write_unlock_bh(&addrconf_hash_lock
);
3829 del_timer(&addr_chk_timer
);
3833 #ifdef CONFIG_IPV6_PRIVACY
3834 crypto_free_tfm(md5_tfm
);
3838 #ifdef CONFIG_PROC_FS
3839 proc_net_remove("if_inet6");