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>
83 #include <asm/uaccess.h>
85 #include <linux/proc_fs.h>
86 #include <linux/seq_file.h>
88 /* Set to 3 to get tracing... */
92 #define ADBG(x) printk x
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
98 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
102 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
105 #ifdef CONFIG_IPV6_PRIVACY
106 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
107 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
108 static void ipv6_regen_rndid(unsigned long data
);
110 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
113 static int ipv6_count_addresses(struct inet6_dev
*idev
);
116 * Configured unicast address hash table
118 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
119 static DEFINE_RWLOCK(addrconf_hash_lock
);
121 /* Protects inet6 devices */
122 DEFINE_RWLOCK(addrconf_lock
);
124 static void addrconf_verify(unsigned long);
126 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
127 static DEFINE_SPINLOCK(addrconf_verify_lock
);
129 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
130 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
132 static int addrconf_ifdown(struct net_device
*dev
, int how
);
134 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
135 static void addrconf_dad_timer(unsigned long data
);
136 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
137 static void addrconf_dad_run(struct inet6_dev
*idev
);
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 #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
199 static inline unsigned ipv6_addr_scope2type(unsigned scope
)
202 case IPV6_ADDR_SCOPE_NODELOCAL
:
203 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL
) |
205 case IPV6_ADDR_SCOPE_LINKLOCAL
:
206 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
) |
207 IPV6_ADDR_LINKLOCAL
);
208 case IPV6_ADDR_SCOPE_SITELOCAL
:
209 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
) |
210 IPV6_ADDR_SITELOCAL
);
212 return IPV6_ADDR_SCOPE_TYPE(scope
);
215 int __ipv6_addr_type(const struct in6_addr
*addr
)
219 st
= addr
->s6_addr32
[0];
221 /* Consider all addresses with the first three bits different of
222 000 and 111 as unicasts.
224 if ((st
& htonl(0xE0000000)) != htonl(0x00000000) &&
225 (st
& htonl(0xE0000000)) != htonl(0xE0000000))
226 return (IPV6_ADDR_UNICAST
|
227 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
));
229 if ((st
& htonl(0xFF000000)) == htonl(0xFF000000)) {
231 /* addr-select 3.1 */
232 return (IPV6_ADDR_MULTICAST
|
233 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr
)));
236 if ((st
& htonl(0xFFC00000)) == htonl(0xFE800000))
237 return (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_UNICAST
|
238 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.1 */
239 if ((st
& htonl(0xFFC00000)) == htonl(0xFEC00000))
240 return (IPV6_ADDR_SITELOCAL
| IPV6_ADDR_UNICAST
|
241 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
)); /* addr-select 3.1 */
243 if ((addr
->s6_addr32
[0] | addr
->s6_addr32
[1]) == 0) {
244 if (addr
->s6_addr32
[2] == 0) {
245 if (addr
->s6_addr32
[3] == 0)
246 return IPV6_ADDR_ANY
;
248 if (addr
->s6_addr32
[3] == htonl(0x00000001))
249 return (IPV6_ADDR_LOOPBACK
| IPV6_ADDR_UNICAST
|
250 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.4 */
252 return (IPV6_ADDR_COMPATv4
| IPV6_ADDR_UNICAST
|
253 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
256 if (addr
->s6_addr32
[2] == htonl(0x0000ffff))
257 return (IPV6_ADDR_MAPPED
|
258 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
261 return (IPV6_ADDR_RESERVED
|
262 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.4 */
265 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
267 if (del_timer(&ifp
->timer
))
271 enum addrconf_timer_t
278 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
279 enum addrconf_timer_t what
,
282 if (!del_timer(&ifp
->timer
))
287 ifp
->timer
.function
= addrconf_dad_timer
;
290 ifp
->timer
.function
= addrconf_rs_timer
;
294 ifp
->timer
.expires
= jiffies
+ when
;
295 add_timer(&ifp
->timer
);
298 /* Nobody refers to this device, we may destroy it. */
300 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
302 struct net_device
*dev
= idev
->dev
;
303 BUG_TRAP(idev
->addr_list
==NULL
);
304 BUG_TRAP(idev
->mc_list
==NULL
);
305 #ifdef NET_REFCNT_DEBUG
306 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
310 printk("Freeing alive inet6 device %p\n", idev
);
313 snmp6_free_dev(idev
);
317 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
319 struct inet6_dev
*ndev
;
323 if (dev
->mtu
< IPV6_MIN_MTU
)
326 ndev
= kmalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
329 memset(ndev
, 0, sizeof(struct inet6_dev
));
331 rwlock_init(&ndev
->lock
);
333 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
334 ndev
->cnf
.mtu6
= dev
->mtu
;
335 ndev
->cnf
.sysctl
= NULL
;
336 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
337 if (ndev
->nd_parms
== NULL
) {
341 /* We refer to the device */
344 if (snmp6_alloc_dev(ndev
) < 0) {
346 "%s(): cannot allocate memory for statistics; dev=%s.\n",
347 __FUNCTION__
, dev
->name
));
348 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
350 in6_dev_finish_destroy(ndev
);
354 if (snmp6_register_dev(ndev
) < 0) {
356 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
357 __FUNCTION__
, dev
->name
));
358 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
360 in6_dev_finish_destroy(ndev
);
364 /* One reference from device. We must do this before
365 * we invoke __ipv6_regen_rndid().
369 #ifdef CONFIG_IPV6_PRIVACY
370 init_timer(&ndev
->regen_timer
);
371 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
372 ndev
->regen_timer
.data
= (unsigned long) ndev
;
373 if ((dev
->flags
&IFF_LOOPBACK
) ||
374 dev
->type
== ARPHRD_TUNNEL
||
375 dev
->type
== ARPHRD_NONE
||
376 dev
->type
== ARPHRD_SIT
) {
378 "%s: Disabled Privacy Extensions\n",
380 ndev
->cnf
.use_tempaddr
= -1;
383 ipv6_regen_rndid((unsigned long) ndev
);
387 if (netif_carrier_ok(dev
))
388 ndev
->if_flags
|= IF_READY
;
390 write_lock_bh(&addrconf_lock
);
392 write_unlock_bh(&addrconf_lock
);
394 ipv6_mc_init_dev(ndev
);
395 ndev
->tstamp
= jiffies
;
397 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
398 NET_IPV6_NEIGH
, "ipv6",
399 &ndisc_ifinfo_sysctl_change
,
401 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
407 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
409 struct inet6_dev
*idev
;
413 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
414 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
418 if (dev
->flags
&IFF_UP
)
424 static void dev_forward_change(struct inet6_dev
*idev
)
426 struct net_device
*dev
;
427 struct inet6_ifaddr
*ifa
;
428 struct in6_addr addr
;
433 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
434 ipv6_addr_all_routers(&addr
);
436 if (idev
->cnf
.forwarding
)
437 ipv6_dev_mc_inc(dev
, &addr
);
439 ipv6_dev_mc_dec(dev
, &addr
);
441 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
442 if (idev
->cnf
.forwarding
)
443 addrconf_join_anycast(ifa
);
445 addrconf_leave_anycast(ifa
);
450 static void addrconf_forward_change(void)
452 struct net_device
*dev
;
453 struct inet6_dev
*idev
;
455 read_lock(&dev_base_lock
);
456 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
457 read_lock(&addrconf_lock
);
458 idev
= __in6_dev_get(dev
);
460 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
461 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
463 dev_forward_change(idev
);
465 read_unlock(&addrconf_lock
);
467 read_unlock(&dev_base_lock
);
471 /* Nobody refers to this ifaddr, destroy it */
473 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
475 BUG_TRAP(ifp
->if_next
==NULL
);
476 BUG_TRAP(ifp
->lst_next
==NULL
);
477 #ifdef NET_REFCNT_DEBUG
478 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
481 in6_dev_put(ifp
->idev
);
483 if (del_timer(&ifp
->timer
))
484 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
487 printk("Freeing alive inet6 address %p\n", ifp
);
490 dst_release(&ifp
->rt
->u
.dst
);
495 /* On success it returns ifp with increased reference count */
497 static struct inet6_ifaddr
*
498 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
499 int scope
, u32 flags
)
501 struct inet6_ifaddr
*ifa
= NULL
;
506 read_lock_bh(&addrconf_lock
);
508 err
= -ENODEV
; /*XXX*/
512 write_lock(&addrconf_hash_lock
);
514 /* Ignore adding duplicate addresses on an interface */
515 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
516 ADBG(("ipv6_add_addr: already assigned\n"));
521 ifa
= kmalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
524 ADBG(("ipv6_add_addr: malloc failed\n"));
529 rt
= addrconf_dst_alloc(idev
, addr
, 0);
535 memset(ifa
, 0, sizeof(struct inet6_ifaddr
));
536 ipv6_addr_copy(&ifa
->addr
, addr
);
538 spin_lock_init(&ifa
->lock
);
539 init_timer(&ifa
->timer
);
540 ifa
->timer
.data
= (unsigned long) ifa
;
542 ifa
->prefix_len
= pfxlen
;
543 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
544 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
551 /* Add to big hash table */
552 hash
= ipv6_addr_hash(addr
);
554 ifa
->lst_next
= inet6_addr_lst
[hash
];
555 inet6_addr_lst
[hash
] = ifa
;
557 write_unlock(&addrconf_hash_lock
);
559 write_lock(&idev
->lock
);
560 /* Add to inet6_dev unicast addr list. */
561 ifa
->if_next
= idev
->addr_list
;
562 idev
->addr_list
= ifa
;
564 #ifdef CONFIG_IPV6_PRIVACY
565 if (ifa
->flags
&IFA_F_TEMPORARY
) {
566 ifa
->tmp_next
= idev
->tempaddr_list
;
567 idev
->tempaddr_list
= ifa
;
575 write_unlock(&idev
->lock
);
577 read_unlock_bh(&addrconf_lock
);
579 if (likely(err
== 0))
580 notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
588 write_unlock(&addrconf_hash_lock
);
592 /* This function wants to get referenced ifp and releases it before return */
594 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
596 struct inet6_ifaddr
*ifa
, **ifap
;
597 struct inet6_dev
*idev
= ifp
->idev
;
599 int deleted
= 0, onlink
= 0;
600 unsigned long expires
= jiffies
;
602 hash
= ipv6_addr_hash(&ifp
->addr
);
606 write_lock_bh(&addrconf_hash_lock
);
607 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
608 ifap
= &ifa
->lst_next
) {
610 *ifap
= ifa
->lst_next
;
612 ifa
->lst_next
= NULL
;
616 write_unlock_bh(&addrconf_hash_lock
);
618 write_lock_bh(&idev
->lock
);
619 #ifdef CONFIG_IPV6_PRIVACY
620 if (ifp
->flags
&IFA_F_TEMPORARY
) {
621 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
622 ifap
= &ifa
->tmp_next
) {
624 *ifap
= ifa
->tmp_next
;
626 in6_ifa_put(ifp
->ifpub
);
630 ifa
->tmp_next
= NULL
;
637 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
639 *ifap
= ifa
->if_next
;
642 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
646 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
647 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
649 if (ifa
->flags
& IFA_F_PERMANENT
) {
654 unsigned long lifetime
;
659 spin_lock(&ifa
->lock
);
660 lifetime
= min_t(unsigned long,
661 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
662 if (time_before(expires
,
663 ifa
->tstamp
+ lifetime
* HZ
))
664 expires
= ifa
->tstamp
+ lifetime
* HZ
;
665 spin_unlock(&ifa
->lock
);
669 ifap
= &ifa
->if_next
;
671 write_unlock_bh(&idev
->lock
);
673 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
675 notifier_call_chain(&inet6addr_chain
,NETDEV_DOWN
,ifp
);
677 addrconf_del_timer(ifp
);
680 * Purge or update corresponding prefix
682 * 1) we don't purge prefix here if address was not permanent.
683 * prefix is managed by its own lifetime.
684 * 2) if there're no addresses, delete prefix.
685 * 3) if there're still other permanent address(es),
686 * corresponding prefix is still permanent.
687 * 4) otherwise, update prefix lifetime to the
688 * longest valid lifetime among the corresponding
689 * addresses on the device.
690 * Note: subsequent RA will update lifetime.
694 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
695 struct in6_addr prefix
;
698 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
699 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
701 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
703 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
705 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
706 rt
->rt6i_expires
= expires
;
707 rt
->rt6i_flags
|= RTF_EXPIRES
;
710 dst_release(&rt
->u
.dst
);
716 #ifdef CONFIG_IPV6_PRIVACY
717 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
719 struct inet6_dev
*idev
= ifp
->idev
;
720 struct in6_addr addr
, *tmpaddr
;
721 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
726 write_lock(&idev
->lock
);
728 spin_lock_bh(&ift
->lock
);
729 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
730 spin_unlock_bh(&ift
->lock
);
737 if (idev
->cnf
.use_tempaddr
<= 0) {
738 write_unlock(&idev
->lock
);
740 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
745 spin_lock_bh(&ifp
->lock
);
746 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
747 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
748 spin_unlock_bh(&ifp
->lock
);
749 write_unlock(&idev
->lock
);
751 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
757 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
758 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
759 spin_unlock_bh(&ifp
->lock
);
760 write_unlock(&idev
->lock
);
762 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
768 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
769 tmp_valid_lft
= min_t(__u32
,
771 idev
->cnf
.temp_valid_lft
);
772 tmp_prefered_lft
= min_t(__u32
,
774 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
775 tmp_plen
= ifp
->prefix_len
;
776 max_addresses
= idev
->cnf
.max_addresses
;
777 tmp_cstamp
= ifp
->cstamp
;
778 tmp_tstamp
= ifp
->tstamp
;
779 spin_unlock_bh(&ifp
->lock
);
781 write_unlock(&idev
->lock
);
782 ift
= !max_addresses
||
783 ipv6_count_addresses(idev
) < max_addresses
?
784 ipv6_add_addr(idev
, &addr
, tmp_plen
,
785 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
786 if (!ift
|| IS_ERR(ift
)) {
790 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
792 write_lock(&idev
->lock
);
796 spin_lock_bh(&ift
->lock
);
798 ift
->valid_lft
= tmp_valid_lft
;
799 ift
->prefered_lft
= tmp_prefered_lft
;
800 ift
->cstamp
= tmp_cstamp
;
801 ift
->tstamp
= tmp_tstamp
;
802 spin_unlock_bh(&ift
->lock
);
804 addrconf_dad_start(ift
, 0);
813 * Choose an appropriate source address (RFC3484)
815 struct ipv6_saddr_score
{
823 #define IPV6_SADDR_SCORE_LOCAL 0x0001
824 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
825 #define IPV6_SADDR_SCORE_HOA 0x0008
826 #define IPV6_SADDR_SCORE_OIF 0x0010
827 #define IPV6_SADDR_SCORE_LABEL 0x0020
828 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
830 static int inline ipv6_saddr_preferred(int type
)
832 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
833 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
838 /* static matching label */
839 static int inline ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
842 * prefix (longest match) label
843 * -----------------------------
850 if (type
& IPV6_ADDR_LOOPBACK
)
852 else if (type
& IPV6_ADDR_COMPATv4
)
854 else if (type
& IPV6_ADDR_MAPPED
)
856 else if (addr
->s6_addr16
[0] == htons(0x2002))
861 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
862 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
864 struct ipv6_saddr_score hiscore
;
865 struct inet6_ifaddr
*ifa_result
= NULL
;
866 int daddr_type
= __ipv6_addr_type(daddr
);
867 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
868 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
869 struct net_device
*dev
;
871 memset(&hiscore
, 0, sizeof(hiscore
));
873 read_lock(&dev_base_lock
);
874 read_lock(&addrconf_lock
);
876 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
877 struct inet6_dev
*idev
;
878 struct inet6_ifaddr
*ifa
;
880 /* Rule 0: Candidate Source Address (section 4)
881 * - multicast and link-local destination address,
882 * the set of candidate source address MUST only
883 * include addresses assigned to interfaces
884 * belonging to the same link as the outgoing
886 * (- For site-local destination addresses, the
887 * set of candidate source addresses MUST only
888 * include addresses assigned to interfaces
889 * belonging to the same site as the outgoing
892 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
893 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
894 daddr_dev
&& dev
!= daddr_dev
)
897 idev
= __in6_dev_get(dev
);
901 read_lock_bh(&idev
->lock
);
902 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
903 struct ipv6_saddr_score score
;
905 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
908 * - Tentative Address (RFC2462 section 5.4)
909 * - A tentative address is not considered
910 * "assigned to an interface" in the traditional
912 * - Candidate Source Address (section 4)
913 * - In any case, anycast addresses, multicast
914 * addresses, and the unspecified address MUST
915 * NOT be included in a candidate set.
917 if (ifa
->flags
& IFA_F_TENTATIVE
)
919 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
920 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
921 LIMIT_NETDEBUG(KERN_DEBUG
922 "ADDRCONF: unspecified / multicast address"
923 "assigned as unicast address on %s",
933 if (ifa_result
== NULL
) {
934 /* record it if the first available entry */
938 /* Rule 1: Prefer same address */
939 if (hiscore
.rule
< 1) {
940 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
941 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
944 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
945 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
946 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
951 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
955 /* Rule 2: Prefer appropriate scope */
956 if (hiscore
.rule
< 2) {
957 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
960 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
961 if (hiscore
.scope
< score
.scope
) {
962 if (hiscore
.scope
< daddr_scope
) {
967 } else if (score
.scope
< hiscore
.scope
) {
968 if (score
.scope
< daddr_scope
)
976 /* Rule 3: Avoid deprecated address */
977 if (hiscore
.rule
< 3) {
978 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
979 !(ifa_result
->flags
& IFA_F_DEPRECATED
))
980 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
983 if (ipv6_saddr_preferred(score
.addr_type
) ||
984 !(ifa
->flags
& IFA_F_DEPRECATED
)) {
985 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
986 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
991 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
995 /* Rule 4: Prefer home address -- not implemented yet */
996 if (hiscore
.rule
< 4)
999 /* Rule 5: Prefer outgoing interface */
1000 if (hiscore
.rule
< 5) {
1001 if (daddr_dev
== NULL
||
1002 daddr_dev
== ifa_result
->idev
->dev
)
1003 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1006 if (daddr_dev
== NULL
||
1007 daddr_dev
== ifa
->idev
->dev
) {
1008 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1009 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1014 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1018 /* Rule 6: Prefer matching label */
1019 if (hiscore
.rule
< 6) {
1020 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1021 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1024 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1025 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1026 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1031 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1035 #ifdef CONFIG_IPV6_PRIVACY
1036 /* Rule 7: Prefer public address
1037 * Note: prefer temprary address if use_tempaddr >= 2
1039 if (hiscore
.rule
< 7) {
1040 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1041 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1042 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1045 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1046 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1047 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1048 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1053 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1057 /* Rule 8: Use longest matching prefix */
1058 if (hiscore
.rule
< 8) {
1059 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1062 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1063 if (score
.matchlen
> hiscore
.matchlen
) {
1068 else if (score
.matchlen
< hiscore
.matchlen
)
1072 /* Final Rule: choose first available one */
1076 in6_ifa_put(ifa_result
);
1081 read_unlock_bh(&idev
->lock
);
1083 read_unlock(&addrconf_lock
);
1084 read_unlock(&dev_base_lock
);
1087 return -EADDRNOTAVAIL
;
1089 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1090 in6_ifa_put(ifa_result
);
1095 int ipv6_get_saddr(struct dst_entry
*dst
,
1096 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1098 return ipv6_dev_get_saddr(dst
? ((struct rt6_info
*)dst
)->rt6i_idev
->dev
: NULL
, daddr
, saddr
);
1102 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
1104 struct inet6_dev
*idev
;
1105 int err
= -EADDRNOTAVAIL
;
1107 read_lock(&addrconf_lock
);
1108 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1109 struct inet6_ifaddr
*ifp
;
1111 read_lock_bh(&idev
->lock
);
1112 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1113 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1114 ipv6_addr_copy(addr
, &ifp
->addr
);
1119 read_unlock_bh(&idev
->lock
);
1121 read_unlock(&addrconf_lock
);
1125 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1128 struct inet6_ifaddr
*ifp
;
1130 read_lock_bh(&idev
->lock
);
1131 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1133 read_unlock_bh(&idev
->lock
);
1137 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1139 struct inet6_ifaddr
* ifp
;
1140 u8 hash
= ipv6_addr_hash(addr
);
1142 read_lock_bh(&addrconf_hash_lock
);
1143 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1144 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1145 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1146 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1147 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1151 read_unlock_bh(&addrconf_hash_lock
);
1156 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1158 struct inet6_ifaddr
* ifp
;
1159 u8 hash
= ipv6_addr_hash(addr
);
1161 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1162 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1163 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1170 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1172 struct inet6_ifaddr
* ifp
;
1173 u8 hash
= ipv6_addr_hash(addr
);
1175 read_lock_bh(&addrconf_hash_lock
);
1176 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1177 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1178 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1179 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1185 read_unlock_bh(&addrconf_hash_lock
);
1190 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1192 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1193 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1194 u32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1195 u32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1196 int sk_ipv6only
= ipv6_only_sock(sk
);
1197 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1198 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1199 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1201 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1204 if (addr_type2
== IPV6_ADDR_ANY
&&
1205 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1208 if (addr_type
== IPV6_ADDR_ANY
&&
1209 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1212 if (sk2_rcv_saddr6
&&
1213 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1216 if (addr_type
== IPV6_ADDR_MAPPED
&&
1218 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1224 /* Gets referenced address, destroys ifaddr */
1226 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1228 if (ifp
->flags
&IFA_F_PERMANENT
) {
1229 spin_lock_bh(&ifp
->lock
);
1230 addrconf_del_timer(ifp
);
1231 ifp
->flags
|= IFA_F_TENTATIVE
;
1232 spin_unlock_bh(&ifp
->lock
);
1234 #ifdef CONFIG_IPV6_PRIVACY
1235 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1236 struct inet6_ifaddr
*ifpub
;
1237 spin_lock_bh(&ifp
->lock
);
1240 in6_ifa_hold(ifpub
);
1241 spin_unlock_bh(&ifp
->lock
);
1242 ipv6_create_tempaddr(ifpub
, ifp
);
1245 spin_unlock_bh(&ifp
->lock
);
1253 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1255 if (net_ratelimit())
1256 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1257 addrconf_dad_stop(ifp
);
1260 /* Join to solicited addr multicast group. */
1262 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1264 struct in6_addr maddr
;
1266 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1269 addrconf_addr_solict_mult(addr
, &maddr
);
1270 ipv6_dev_mc_inc(dev
, &maddr
);
1273 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1275 struct in6_addr maddr
;
1277 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1280 addrconf_addr_solict_mult(addr
, &maddr
);
1281 __ipv6_dev_mc_dec(idev
, &maddr
);
1284 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1286 struct in6_addr addr
;
1287 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1288 if (ipv6_addr_any(&addr
))
1290 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1293 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1295 struct in6_addr addr
;
1296 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1297 if (ipv6_addr_any(&addr
))
1299 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1302 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1304 if (dev
->addr_len
!= ETH_ALEN
)
1306 memcpy(eui
, dev
->dev_addr
, 3);
1307 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1310 * The zSeries OSA network cards can be shared among various
1311 * OS instances, but the OSA cards have only one MAC address.
1312 * This leads to duplicate address conflicts in conjunction
1313 * with IPv6 if more than one instance uses the same card.
1315 * The driver for these cards can deliver a unique 16-bit
1316 * identifier for each instance sharing the same card. It is
1317 * placed instead of 0xFFFE in the interface identifier. The
1318 * "u" bit of the interface identifier is not inverted in this
1319 * case. Hence the resulting interface identifier has local
1320 * scope according to RFC2373.
1323 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1324 eui
[4] = dev
->dev_id
& 0xFF;
1333 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1335 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1336 if (dev
->addr_len
!= ARCNET_ALEN
)
1339 eui
[7] = *(u8
*)dev
->dev_addr
;
1343 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1345 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1347 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1352 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1354 switch (dev
->type
) {
1357 case ARPHRD_IEEE802_TR
:
1358 return addrconf_ifid_eui48(eui
, dev
);
1360 return addrconf_ifid_arcnet(eui
, dev
);
1361 case ARPHRD_INFINIBAND
:
1362 return addrconf_ifid_infiniband(eui
, dev
);
1367 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1370 struct inet6_ifaddr
*ifp
;
1372 read_lock_bh(&idev
->lock
);
1373 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1374 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1375 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1380 read_unlock_bh(&idev
->lock
);
1384 #ifdef CONFIG_IPV6_PRIVACY
1385 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1386 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1389 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1390 idev
->rndid
[0] &= ~0x02;
1393 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1394 * check if generated address is not inappropriate
1396 * - Reserved subnet anycast (RFC 2526)
1397 * 11111101 11....11 1xxxxxxx
1398 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1399 * 00-00-5E-FE-xx-xx-xx-xx
1401 * - XXX: already assigned to an address on the device
1403 if (idev
->rndid
[0] == 0xfd &&
1404 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1405 (idev
->rndid
[7]&0x80))
1407 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1408 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1410 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1417 static void ipv6_regen_rndid(unsigned long data
)
1419 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1420 unsigned long expires
;
1422 read_lock_bh(&addrconf_lock
);
1423 write_lock_bh(&idev
->lock
);
1428 if (__ipv6_regen_rndid(idev
) < 0)
1432 idev
->cnf
.temp_prefered_lft
* HZ
-
1433 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1434 if (time_before(expires
, jiffies
)) {
1436 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1441 if (!mod_timer(&idev
->regen_timer
, expires
))
1445 write_unlock_bh(&idev
->lock
);
1446 read_unlock_bh(&addrconf_lock
);
1450 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1453 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1454 ret
= __ipv6_regen_rndid(idev
);
1464 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1465 unsigned long expires
, u32 flags
)
1467 struct in6_rtmsg rtmsg
;
1469 memset(&rtmsg
, 0, sizeof(rtmsg
));
1470 ipv6_addr_copy(&rtmsg
.rtmsg_dst
, pfx
);
1471 rtmsg
.rtmsg_dst_len
= plen
;
1472 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1473 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1474 rtmsg
.rtmsg_info
= expires
;
1475 rtmsg
.rtmsg_flags
= RTF_UP
|flags
;
1476 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1478 /* Prevent useless cloning on PtP SIT.
1479 This thing is done here expecting that the whole
1480 class of non-broadcast devices need not cloning.
1482 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
&IFF_POINTOPOINT
))
1483 rtmsg
.rtmsg_flags
|= RTF_NONEXTHOP
;
1485 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1488 /* Create "default" multicast route to the interface */
1490 static void addrconf_add_mroute(struct net_device
*dev
)
1492 struct in6_rtmsg rtmsg
;
1494 memset(&rtmsg
, 0, sizeof(rtmsg
));
1495 ipv6_addr_set(&rtmsg
.rtmsg_dst
,
1496 htonl(0xFF000000), 0, 0, 0);
1497 rtmsg
.rtmsg_dst_len
= 8;
1498 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1499 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1500 rtmsg
.rtmsg_flags
= RTF_UP
;
1501 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1502 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1505 static void sit_route_add(struct net_device
*dev
)
1507 struct in6_rtmsg rtmsg
;
1509 memset(&rtmsg
, 0, sizeof(rtmsg
));
1511 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1512 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1514 /* prefix length - 96 bits "::d.d.d.d" */
1515 rtmsg
.rtmsg_dst_len
= 96;
1516 rtmsg
.rtmsg_flags
= RTF_UP
|RTF_NONEXTHOP
;
1517 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1519 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1522 static void addrconf_add_lroute(struct net_device
*dev
)
1524 struct in6_addr addr
;
1526 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1527 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1530 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1532 struct inet6_dev
*idev
;
1536 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1539 /* Add default multicast route */
1540 addrconf_add_mroute(dev
);
1542 /* Add link local route */
1543 addrconf_add_lroute(dev
);
1547 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1549 struct prefix_info
*pinfo
;
1553 unsigned long rt_expires
;
1554 struct inet6_dev
*in6_dev
;
1556 pinfo
= (struct prefix_info
*) opt
;
1558 if (len
< sizeof(struct prefix_info
)) {
1559 ADBG(("addrconf: prefix option too short\n"));
1564 * Validation checks ([ADDRCONF], page 19)
1567 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1569 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1572 valid_lft
= ntohl(pinfo
->valid
);
1573 prefered_lft
= ntohl(pinfo
->prefered
);
1575 if (prefered_lft
> valid_lft
) {
1576 if (net_ratelimit())
1577 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1581 in6_dev
= in6_dev_get(dev
);
1583 if (in6_dev
== NULL
) {
1584 if (net_ratelimit())
1585 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1590 * Two things going on here:
1591 * 1) Add routes for on-link prefixes
1592 * 2) Configure prefixes with the auto flag set
1595 /* Avoid arithmetic overflow. Really, we could
1596 save rt_expires in seconds, likely valid_lft,
1597 but it would require division in fib gc, that it
1600 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1601 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1603 rt_expires
= valid_lft
* HZ
;
1606 * We convert this (in jiffies) to clock_t later.
1607 * Avoid arithmetic overflow there as well.
1608 * Overflow can happen only if HZ < USER_HZ.
1610 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1611 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1613 if (pinfo
->onlink
) {
1614 struct rt6_info
*rt
;
1615 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1617 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1618 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1619 if (valid_lft
== 0) {
1620 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
1623 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1626 } else if (valid_lft
) {
1627 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1628 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1631 dst_release(&rt
->u
.dst
);
1634 /* Try to figure out our local address for this prefix */
1636 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1637 struct inet6_ifaddr
* ifp
;
1638 struct in6_addr addr
;
1639 int create
= 0, update_lft
= 0;
1641 if (pinfo
->prefix_len
== 64) {
1642 memcpy(&addr
, &pinfo
->prefix
, 8);
1643 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1644 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1645 in6_dev_put(in6_dev
);
1650 if (net_ratelimit())
1651 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1653 in6_dev_put(in6_dev
);
1658 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1660 if (ifp
== NULL
&& valid_lft
) {
1661 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1663 /* Do not allow to create too much of autoconfigured
1664 * addresses; this would be too easy way to crash kernel.
1666 if (!max_addresses
||
1667 ipv6_count_addresses(in6_dev
) < max_addresses
)
1668 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1669 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1671 if (!ifp
|| IS_ERR(ifp
)) {
1672 in6_dev_put(in6_dev
);
1676 update_lft
= create
= 1;
1677 ifp
->cstamp
= jiffies
;
1678 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1684 #ifdef CONFIG_IPV6_PRIVACY
1685 struct inet6_ifaddr
*ift
;
1689 /* update lifetime (RFC2462 5.5.3 e) */
1690 spin_lock(&ifp
->lock
);
1692 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1693 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1696 if (!update_lft
&& stored_lft
) {
1697 if (valid_lft
> MIN_VALID_LIFETIME
||
1698 valid_lft
> stored_lft
)
1700 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1701 /* valid_lft <= stored_lft is always true */
1705 valid_lft
= MIN_VALID_LIFETIME
;
1706 if (valid_lft
< prefered_lft
)
1707 prefered_lft
= valid_lft
;
1713 ifp
->valid_lft
= valid_lft
;
1714 ifp
->prefered_lft
= prefered_lft
;
1717 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1718 spin_unlock(&ifp
->lock
);
1720 if (!(flags
&IFA_F_TENTATIVE
))
1721 ipv6_ifa_notify(0, ifp
);
1723 spin_unlock(&ifp
->lock
);
1725 #ifdef CONFIG_IPV6_PRIVACY
1726 read_lock_bh(&in6_dev
->lock
);
1727 /* update all temporary addresses in the list */
1728 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1730 * When adjusting the lifetimes of an existing
1731 * temporary address, only lower the lifetimes.
1732 * Implementations must not increase the
1733 * lifetimes of an existing temporary address
1734 * when processing a Prefix Information Option.
1736 spin_lock(&ift
->lock
);
1738 if (ift
->valid_lft
> valid_lft
&&
1739 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1740 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1741 if (ift
->prefered_lft
> prefered_lft
&&
1742 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1743 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1744 spin_unlock(&ift
->lock
);
1745 if (!(flags
&IFA_F_TENTATIVE
))
1746 ipv6_ifa_notify(0, ift
);
1749 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1751 * When a new public address is created as described in [ADDRCONF],
1752 * also create a new temporary address.
1754 read_unlock_bh(&in6_dev
->lock
);
1755 ipv6_create_tempaddr(ifp
, NULL
);
1757 read_unlock_bh(&in6_dev
->lock
);
1764 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1765 in6_dev_put(in6_dev
);
1769 * Set destination address.
1770 * Special case for SIT interfaces where we create a new "virtual"
1773 int addrconf_set_dstaddr(void __user
*arg
)
1775 struct in6_ifreq ireq
;
1776 struct net_device
*dev
;
1782 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1785 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1791 if (dev
->type
== ARPHRD_SIT
) {
1794 struct ip_tunnel_parm p
;
1796 err
= -EADDRNOTAVAIL
;
1797 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1800 memset(&p
, 0, sizeof(p
));
1801 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1805 p
.iph
.protocol
= IPPROTO_IPV6
;
1807 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1809 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1810 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1815 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1817 err
= dev_open(dev
);
1827 * Manual configuration of address on an interface
1829 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
)
1831 struct inet6_ifaddr
*ifp
;
1832 struct inet6_dev
*idev
;
1833 struct net_device
*dev
;
1838 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1841 if (!(dev
->flags
&IFF_UP
))
1844 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1847 scope
= ipv6_addr_scope(pfx
);
1849 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, IFA_F_PERMANENT
);
1851 addrconf_dad_start(ifp
, 0);
1856 return PTR_ERR(ifp
);
1859 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1861 struct inet6_ifaddr
*ifp
;
1862 struct inet6_dev
*idev
;
1863 struct net_device
*dev
;
1865 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1868 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1871 read_lock_bh(&idev
->lock
);
1872 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1873 if (ifp
->prefix_len
== plen
&&
1874 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1876 read_unlock_bh(&idev
->lock
);
1880 /* If the last address is deleted administratively,
1881 disable IPv6 on this interface.
1883 if (idev
->addr_list
== NULL
)
1884 addrconf_ifdown(idev
->dev
, 1);
1888 read_unlock_bh(&idev
->lock
);
1889 return -EADDRNOTAVAIL
;
1893 int addrconf_add_ifaddr(void __user
*arg
)
1895 struct in6_ifreq ireq
;
1898 if (!capable(CAP_NET_ADMIN
))
1901 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1905 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1910 int addrconf_del_ifaddr(void __user
*arg
)
1912 struct in6_ifreq ireq
;
1915 if (!capable(CAP_NET_ADMIN
))
1918 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1922 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1927 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1929 struct inet6_ifaddr
* ifp
;
1930 struct in6_addr addr
;
1931 struct net_device
*dev
;
1936 memset(&addr
, 0, sizeof(struct in6_addr
));
1937 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1939 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1940 addr
.s6_addr32
[0] = htonl(0xfe800000);
1943 scope
= IPV6_ADDR_COMPATv4
;
1946 if (addr
.s6_addr32
[3]) {
1947 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1949 spin_lock_bh(&ifp
->lock
);
1950 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1951 spin_unlock_bh(&ifp
->lock
);
1952 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1958 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1959 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
1960 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1961 struct in_ifaddr
* ifa
;
1965 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
1968 addr
.s6_addr32
[3] = ifa
->ifa_local
;
1970 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
1972 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
1973 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1977 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
1982 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
1985 spin_lock_bh(&ifp
->lock
);
1986 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1987 spin_unlock_bh(&ifp
->lock
);
1988 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1996 static void init_loopback(struct net_device
*dev
)
1998 struct inet6_dev
*idev
;
1999 struct inet6_ifaddr
* ifp
;
2005 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2006 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2010 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2012 spin_lock_bh(&ifp
->lock
);
2013 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2014 spin_unlock_bh(&ifp
->lock
);
2015 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2020 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2022 struct inet6_ifaddr
* ifp
;
2024 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
2026 addrconf_dad_start(ifp
, 0);
2031 static void addrconf_dev_config(struct net_device
*dev
)
2033 struct in6_addr addr
;
2034 struct inet6_dev
* idev
;
2038 if ((dev
->type
!= ARPHRD_ETHER
) &&
2039 (dev
->type
!= ARPHRD_FDDI
) &&
2040 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2041 (dev
->type
!= ARPHRD_ARCNET
) &&
2042 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2043 /* Alas, we support only Ethernet autoconfiguration. */
2047 idev
= addrconf_add_dev(dev
);
2051 memset(&addr
, 0, sizeof(struct in6_addr
));
2052 addr
.s6_addr32
[0] = htonl(0xFE800000);
2054 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2055 addrconf_add_linklocal(idev
, &addr
);
2058 static void addrconf_sit_config(struct net_device
*dev
)
2060 struct inet6_dev
*idev
;
2065 * Configure the tunnel with one of our IPv4
2066 * addresses... we should configure all of
2067 * our v4 addrs in the tunnel
2070 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2071 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2075 sit_add_v4_addrs(idev
);
2077 if (dev
->flags
&IFF_POINTOPOINT
) {
2078 addrconf_add_mroute(dev
);
2079 addrconf_add_lroute(dev
);
2085 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2087 struct in6_addr lladdr
;
2089 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
2090 addrconf_add_linklocal(idev
, &lladdr
);
2096 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2098 struct net_device
*link_dev
;
2100 /* first try to inherit the link-local address from the link device */
2101 if (idev
->dev
->iflink
&&
2102 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2103 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2106 /* then try to inherit it from any device */
2107 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2108 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2111 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2115 * Autoconfigure tunnel with a link-local address so routing protocols,
2116 * DHCPv6, MLD etc. can be run over the virtual link
2119 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2121 struct inet6_dev
*idev
;
2125 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2126 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2129 ip6_tnl_add_linklocal(idev
);
2132 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2135 struct net_device
*dev
= (struct net_device
*) data
;
2136 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2137 int run_pending
= 0;
2142 if (event
== NETDEV_UP
) {
2143 if (!netif_carrier_ok(dev
)) {
2144 /* device is not ready yet. */
2146 "ADDRCONF(NETDEV_UP): %s: "
2147 "link is not ready\n",
2153 idev
->if_flags
|= IF_READY
;
2155 if (!netif_carrier_ok(dev
)) {
2156 /* device is still not ready. */
2161 if (idev
->if_flags
& IF_READY
) {
2162 /* device is already configured. */
2165 idev
->if_flags
|= IF_READY
;
2169 "ADDRCONF(NETDEV_CHANGE): %s: "
2170 "link becomes ready\n",
2178 addrconf_sit_config(dev
);
2180 case ARPHRD_TUNNEL6
:
2181 addrconf_ip6_tnl_config(dev
);
2183 case ARPHRD_LOOPBACK
:
2188 addrconf_dev_config(dev
);
2193 addrconf_dad_run(idev
);
2195 /* If the MTU changed during the interface down, when the
2196 interface up, the changed MTU must be reflected in the
2197 idev as well as routers.
2199 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2200 rt6_mtu_change(dev
, dev
->mtu
);
2201 idev
->cnf
.mtu6
= dev
->mtu
;
2203 idev
->tstamp
= jiffies
;
2204 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2205 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2206 stop IPv6 on this interface.
2208 if (dev
->mtu
< IPV6_MIN_MTU
)
2209 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2213 case NETDEV_CHANGEMTU
:
2214 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2215 rt6_mtu_change(dev
, dev
->mtu
);
2216 idev
->cnf
.mtu6
= dev
->mtu
;
2220 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2223 case NETDEV_UNREGISTER
:
2225 * Remove all addresses from this interface.
2227 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2230 case NETDEV_CHANGENAME
:
2231 #ifdef CONFIG_SYSCTL
2233 addrconf_sysctl_unregister(&idev
->cnf
);
2234 neigh_sysctl_unregister(idev
->nd_parms
);
2235 neigh_sysctl_register(dev
, idev
->nd_parms
,
2236 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2237 &ndisc_ifinfo_sysctl_change
,
2239 addrconf_sysctl_register(idev
, &idev
->cnf
);
2249 * addrconf module should be notified of a device going up
2251 static struct notifier_block ipv6_dev_notf
= {
2252 .notifier_call
= addrconf_notify
,
2256 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2258 struct inet6_dev
*idev
;
2259 struct inet6_ifaddr
*ifa
, **bifa
;
2264 if (dev
== &loopback_dev
&& how
== 1)
2268 neigh_ifdown(&nd_tbl
, dev
);
2270 idev
= __in6_dev_get(dev
);
2274 /* Step 1: remove reference to ipv6 device from parent device.
2278 write_lock_bh(&addrconf_lock
);
2279 dev
->ip6_ptr
= NULL
;
2281 write_unlock_bh(&addrconf_lock
);
2283 /* Step 1.5: remove snmp6 entry */
2284 snmp6_unregister_dev(idev
);
2288 /* Step 2: clear hash table */
2289 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2290 bifa
= &inet6_addr_lst
[i
];
2292 write_lock_bh(&addrconf_hash_lock
);
2293 while ((ifa
= *bifa
) != NULL
) {
2294 if (ifa
->idev
== idev
) {
2295 *bifa
= ifa
->lst_next
;
2296 ifa
->lst_next
= NULL
;
2297 addrconf_del_timer(ifa
);
2301 bifa
= &ifa
->lst_next
;
2303 write_unlock_bh(&addrconf_hash_lock
);
2306 write_lock_bh(&idev
->lock
);
2308 /* Step 3: clear flags for stateless addrconf */
2310 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2312 /* Step 4: clear address list */
2313 #ifdef CONFIG_IPV6_PRIVACY
2314 if (how
== 1 && del_timer(&idev
->regen_timer
))
2317 /* clear tempaddr list */
2318 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2319 idev
->tempaddr_list
= ifa
->tmp_next
;
2320 ifa
->tmp_next
= NULL
;
2322 write_unlock_bh(&idev
->lock
);
2323 spin_lock_bh(&ifa
->lock
);
2326 in6_ifa_put(ifa
->ifpub
);
2329 spin_unlock_bh(&ifa
->lock
);
2331 write_lock_bh(&idev
->lock
);
2334 while ((ifa
= idev
->addr_list
) != NULL
) {
2335 idev
->addr_list
= ifa
->if_next
;
2336 ifa
->if_next
= NULL
;
2338 addrconf_del_timer(ifa
);
2339 write_unlock_bh(&idev
->lock
);
2341 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2344 write_lock_bh(&idev
->lock
);
2346 write_unlock_bh(&idev
->lock
);
2348 /* Step 5: Discard multicast list */
2351 ipv6_mc_destroy_dev(idev
);
2355 /* Step 5: netlink notification of this interface */
2356 idev
->tstamp
= jiffies
;
2357 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2359 /* Shot the device (if unregistered) */
2362 #ifdef CONFIG_SYSCTL
2363 addrconf_sysctl_unregister(&idev
->cnf
);
2364 neigh_sysctl_unregister(idev
->nd_parms
);
2366 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2367 neigh_ifdown(&nd_tbl
, dev
);
2373 static void addrconf_rs_timer(unsigned long data
)
2375 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2377 if (ifp
->idev
->cnf
.forwarding
)
2380 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2382 * Announcement received after solicitation
2388 spin_lock(&ifp
->lock
);
2389 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2390 struct in6_addr all_routers
;
2392 /* The wait after the last probe can be shorter */
2393 addrconf_mod_timer(ifp
, AC_RS
,
2394 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2395 ifp
->idev
->cnf
.rtr_solicit_delay
:
2396 ifp
->idev
->cnf
.rtr_solicit_interval
);
2397 spin_unlock(&ifp
->lock
);
2399 ipv6_addr_all_routers(&all_routers
);
2401 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2403 spin_unlock(&ifp
->lock
);
2405 * Note: we do not support deprecated "all on-link"
2406 * assumption any longer.
2408 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2409 ifp
->idev
->dev
->name
);
2417 * Duplicate Address Detection
2419 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2421 unsigned long rand_num
;
2422 struct inet6_dev
*idev
= ifp
->idev
;
2424 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2425 ifp
->probes
= idev
->cnf
.dad_transmits
;
2426 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2429 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2431 struct inet6_dev
*idev
= ifp
->idev
;
2432 struct net_device
*dev
= idev
->dev
;
2434 addrconf_join_solict(dev
, &ifp
->addr
);
2436 if (ifp
->prefix_len
!= 128 && (ifp
->flags
&IFA_F_PERMANENT
))
2437 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
, 0,
2440 net_srandom(ifp
->addr
.s6_addr32
[3]);
2442 read_lock_bh(&idev
->lock
);
2445 spin_lock_bh(&ifp
->lock
);
2447 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2448 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2449 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2450 spin_unlock_bh(&ifp
->lock
);
2451 read_unlock_bh(&idev
->lock
);
2453 addrconf_dad_completed(ifp
);
2457 if (!(idev
->if_flags
& IF_READY
)) {
2458 spin_unlock_bh(&ifp
->lock
);
2459 read_unlock_bh(&idev
->lock
);
2461 * If the defice is not ready:
2462 * - keep it tentative if it is a permanent address.
2463 * - otherwise, kill it.
2466 addrconf_dad_stop(ifp
);
2469 addrconf_dad_kick(ifp
);
2470 spin_unlock_bh(&ifp
->lock
);
2472 read_unlock_bh(&idev
->lock
);
2475 static void addrconf_dad_timer(unsigned long data
)
2477 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2478 struct inet6_dev
*idev
= ifp
->idev
;
2479 struct in6_addr unspec
;
2480 struct in6_addr mcaddr
;
2482 read_lock_bh(&idev
->lock
);
2484 read_unlock_bh(&idev
->lock
);
2487 spin_lock_bh(&ifp
->lock
);
2488 if (ifp
->probes
== 0) {
2490 * DAD was successful
2493 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2494 spin_unlock_bh(&ifp
->lock
);
2495 read_unlock_bh(&idev
->lock
);
2497 addrconf_dad_completed(ifp
);
2503 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2504 spin_unlock_bh(&ifp
->lock
);
2505 read_unlock_bh(&idev
->lock
);
2507 /* send a neighbour solicitation for our addr */
2508 memset(&unspec
, 0, sizeof(unspec
));
2509 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2510 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2515 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2517 struct net_device
* dev
= ifp
->idev
->dev
;
2520 * Configure the address for reception. Now it is valid.
2523 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2525 /* If added prefix is link local and forwarding is off,
2526 start sending router solicitations.
2529 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2530 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2531 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2532 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2533 struct in6_addr all_routers
;
2535 ipv6_addr_all_routers(&all_routers
);
2538 * If a host as already performed a random delay
2539 * [...] as part of DAD [...] there is no need
2540 * to delay again before sending the first RS
2542 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2544 spin_lock_bh(&ifp
->lock
);
2546 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2547 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2548 spin_unlock_bh(&ifp
->lock
);
2552 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2553 struct inet6_ifaddr
*ifp
;
2555 read_lock_bh(&idev
->lock
);
2556 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2557 spin_lock_bh(&ifp
->lock
);
2558 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2559 spin_unlock_bh(&ifp
->lock
);
2562 spin_unlock_bh(&ifp
->lock
);
2563 addrconf_dad_kick(ifp
);
2565 read_unlock_bh(&idev
->lock
);
2568 #ifdef CONFIG_PROC_FS
2569 struct if6_iter_state
{
2573 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2575 struct inet6_ifaddr
*ifa
= NULL
;
2576 struct if6_iter_state
*state
= seq
->private;
2578 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2579 ifa
= inet6_addr_lst
[state
->bucket
];
2586 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2588 struct if6_iter_state
*state
= seq
->private;
2590 ifa
= ifa
->lst_next
;
2592 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2593 ifa
= inet6_addr_lst
[state
->bucket
];
2599 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2601 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2604 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2606 return pos
? NULL
: ifa
;
2609 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2611 read_lock_bh(&addrconf_hash_lock
);
2612 return if6_get_idx(seq
, *pos
);
2615 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2617 struct inet6_ifaddr
*ifa
;
2619 ifa
= if6_get_next(seq
, v
);
2624 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2626 read_unlock_bh(&addrconf_hash_lock
);
2629 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2631 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2633 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2635 ifp
->idev
->dev
->ifindex
,
2639 ifp
->idev
->dev
->name
);
2643 static struct seq_operations if6_seq_ops
= {
2644 .start
= if6_seq_start
,
2645 .next
= if6_seq_next
,
2646 .show
= if6_seq_show
,
2647 .stop
= if6_seq_stop
,
2650 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2652 struct seq_file
*seq
;
2654 struct if6_iter_state
*s
= kmalloc(sizeof(*s
), GFP_KERNEL
);
2658 memset(s
, 0, sizeof(*s
));
2660 rc
= seq_open(file
, &if6_seq_ops
);
2664 seq
= file
->private_data
;
2673 static struct file_operations if6_fops
= {
2674 .owner
= THIS_MODULE
,
2675 .open
= if6_seq_open
,
2677 .llseek
= seq_lseek
,
2678 .release
= seq_release_private
,
2681 int __init
if6_proc_init(void)
2683 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2688 void if6_proc_exit(void)
2690 proc_net_remove("if_inet6");
2692 #endif /* CONFIG_PROC_FS */
2695 * Periodic address status verification
2698 static void addrconf_verify(unsigned long foo
)
2700 struct inet6_ifaddr
*ifp
;
2701 unsigned long now
, next
;
2704 spin_lock_bh(&addrconf_verify_lock
);
2706 next
= now
+ ADDR_CHECK_FREQUENCY
;
2708 del_timer(&addr_chk_timer
);
2710 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2713 read_lock(&addrconf_hash_lock
);
2714 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2716 #ifdef CONFIG_IPV6_PRIVACY
2717 unsigned long regen_advance
;
2720 if (ifp
->flags
& IFA_F_PERMANENT
)
2723 spin_lock(&ifp
->lock
);
2724 age
= (now
- ifp
->tstamp
) / HZ
;
2726 #ifdef CONFIG_IPV6_PRIVACY
2727 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2728 ifp
->idev
->cnf
.dad_transmits
*
2729 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2732 if (age
>= ifp
->valid_lft
) {
2733 spin_unlock(&ifp
->lock
);
2735 read_unlock(&addrconf_hash_lock
);
2738 } else if (age
>= ifp
->prefered_lft
) {
2739 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2742 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2744 ifp
->flags
|= IFA_F_DEPRECATED
;
2747 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2748 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2750 spin_unlock(&ifp
->lock
);
2754 read_unlock(&addrconf_hash_lock
);
2756 ipv6_ifa_notify(0, ifp
);
2760 #ifdef CONFIG_IPV6_PRIVACY
2761 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2762 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2763 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2764 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2765 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2766 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2767 if (!ifp
->regen_count
&& ifpub
) {
2770 in6_ifa_hold(ifpub
);
2771 spin_unlock(&ifp
->lock
);
2772 read_unlock(&addrconf_hash_lock
);
2773 spin_lock(&ifpub
->lock
);
2774 ifpub
->regen_count
= 0;
2775 spin_unlock(&ifpub
->lock
);
2776 ipv6_create_tempaddr(ifpub
, ifp
);
2781 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2782 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2783 spin_unlock(&ifp
->lock
);
2786 /* ifp->prefered_lft <= ifp->valid_lft */
2787 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2788 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2789 spin_unlock(&ifp
->lock
);
2792 read_unlock(&addrconf_hash_lock
);
2795 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2796 add_timer(&addr_chk_timer
);
2797 spin_unlock_bh(&addrconf_verify_lock
);
2801 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2803 struct rtattr
**rta
= arg
;
2804 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2805 struct in6_addr
*pfx
;
2808 if (rta
[IFA_ADDRESS
-1]) {
2809 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2811 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2813 if (rta
[IFA_LOCAL
-1]) {
2814 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2816 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2821 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2825 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2827 struct rtattr
**rta
= arg
;
2828 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2829 struct in6_addr
*pfx
;
2832 if (rta
[IFA_ADDRESS
-1]) {
2833 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2835 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2837 if (rta
[IFA_LOCAL
-1]) {
2838 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2840 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2845 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2848 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
2849 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2851 struct ifaddrmsg
*ifm
;
2852 struct nlmsghdr
*nlh
;
2853 struct ifa_cacheinfo ci
;
2854 unsigned char *b
= skb
->tail
;
2856 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2857 ifm
= NLMSG_DATA(nlh
);
2858 ifm
->ifa_family
= AF_INET6
;
2859 ifm
->ifa_prefixlen
= ifa
->prefix_len
;
2860 ifm
->ifa_flags
= ifa
->flags
;
2861 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2862 if (ifa
->scope
&IFA_HOST
)
2863 ifm
->ifa_scope
= RT_SCOPE_HOST
;
2864 else if (ifa
->scope
&IFA_LINK
)
2865 ifm
->ifa_scope
= RT_SCOPE_LINK
;
2866 else if (ifa
->scope
&IFA_SITE
)
2867 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2868 ifm
->ifa_index
= ifa
->idev
->dev
->ifindex
;
2869 RTA_PUT(skb
, IFA_ADDRESS
, 16, &ifa
->addr
);
2870 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
2871 ci
.ifa_prefered
= ifa
->prefered_lft
;
2872 ci
.ifa_valid
= ifa
->valid_lft
;
2873 if (ci
.ifa_prefered
!= INFINITY_LIFE_TIME
) {
2874 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
2875 ci
.ifa_prefered
-= tval
;
2876 if (ci
.ifa_valid
!= INFINITY_LIFE_TIME
)
2877 ci
.ifa_valid
-= tval
;
2880 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2881 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2883 ci
.cstamp
= (__u32
)(TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) / HZ
* 100
2884 + TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2885 ci
.tstamp
= (__u32
)(TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2886 + TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2887 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2888 nlh
->nlmsg_len
= skb
->tail
- b
;
2893 skb_trim(skb
, b
- skb
->data
);
2897 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
2898 u32 pid
, u32 seq
, int event
, u16 flags
)
2900 struct ifaddrmsg
*ifm
;
2901 struct nlmsghdr
*nlh
;
2902 struct ifa_cacheinfo ci
;
2903 unsigned char *b
= skb
->tail
;
2905 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2906 ifm
= NLMSG_DATA(nlh
);
2907 ifm
->ifa_family
= AF_INET6
;
2908 ifm
->ifa_prefixlen
= 128;
2909 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2910 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2911 if (ipv6_addr_scope(&ifmca
->mca_addr
)&IFA_SITE
)
2912 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2913 ifm
->ifa_index
= ifmca
->idev
->dev
->ifindex
;
2914 RTA_PUT(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
);
2915 ci
.cstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) / HZ
2916 * 100 + TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) % HZ
2918 ci
.tstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) / HZ
2919 * 100 + TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) % HZ
2921 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2922 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2923 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2924 nlh
->nlmsg_len
= skb
->tail
- b
;
2929 skb_trim(skb
, b
- skb
->data
);
2933 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
2934 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2936 struct ifaddrmsg
*ifm
;
2937 struct nlmsghdr
*nlh
;
2938 struct ifa_cacheinfo ci
;
2939 unsigned char *b
= skb
->tail
;
2941 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2942 ifm
= NLMSG_DATA(nlh
);
2943 ifm
->ifa_family
= AF_INET6
;
2944 ifm
->ifa_prefixlen
= 128;
2945 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2946 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2947 if (ipv6_addr_scope(&ifaca
->aca_addr
)&IFA_SITE
)
2948 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2949 ifm
->ifa_index
= ifaca
->aca_idev
->dev
->ifindex
;
2950 RTA_PUT(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
);
2951 ci
.cstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) / HZ
2952 * 100 + TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) % HZ
2954 ci
.tstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) / HZ
2955 * 100 + TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) % HZ
2957 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2958 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2959 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2960 nlh
->nlmsg_len
= skb
->tail
- b
;
2965 skb_trim(skb
, b
- skb
->data
);
2976 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
2977 enum addr_type_t type
)
2980 int s_idx
, s_ip_idx
;
2982 struct net_device
*dev
;
2983 struct inet6_dev
*idev
= NULL
;
2984 struct inet6_ifaddr
*ifa
;
2985 struct ifmcaddr6
*ifmca
;
2986 struct ifacaddr6
*ifaca
;
2988 s_idx
= cb
->args
[0];
2989 s_ip_idx
= ip_idx
= cb
->args
[1];
2990 read_lock(&dev_base_lock
);
2992 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
2998 if ((idev
= in6_dev_get(dev
)) == NULL
)
3000 read_lock_bh(&idev
->lock
);
3003 /* unicast address incl. temp addr */
3004 for (ifa
= idev
->addr_list
; ifa
;
3005 ifa
= ifa
->if_next
, ip_idx
++) {
3006 if (ip_idx
< s_ip_idx
)
3008 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3009 NETLINK_CB(cb
->skb
).pid
,
3010 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3015 case MULTICAST_ADDR
:
3016 /* multicast address */
3017 for (ifmca
= idev
->mc_list
; ifmca
;
3018 ifmca
= ifmca
->next
, ip_idx
++) {
3019 if (ip_idx
< s_ip_idx
)
3021 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3022 NETLINK_CB(cb
->skb
).pid
,
3023 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3029 /* anycast address */
3030 for (ifaca
= idev
->ac_list
; ifaca
;
3031 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3032 if (ip_idx
< s_ip_idx
)
3034 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3035 NETLINK_CB(cb
->skb
).pid
,
3036 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3044 read_unlock_bh(&idev
->lock
);
3049 read_unlock_bh(&idev
->lock
);
3052 read_unlock(&dev_base_lock
);
3054 cb
->args
[1] = ip_idx
;
3058 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3060 enum addr_type_t type
= UNICAST_ADDR
;
3061 return inet6_dump_addr(skb
, cb
, type
);
3064 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3066 enum addr_type_t type
= MULTICAST_ADDR
;
3067 return inet6_dump_addr(skb
, cb
, type
);
3071 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3073 enum addr_type_t type
= ANYCAST_ADDR
;
3074 return inet6_dump_addr(skb
, cb
, type
);
3077 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3079 struct sk_buff
*skb
;
3080 int size
= NLMSG_SPACE(sizeof(struct ifaddrmsg
)+128);
3082 skb
= alloc_skb(size
, GFP_ATOMIC
);
3084 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, ENOBUFS
);
3087 if (inet6_fill_ifaddr(skb
, ifa
, current
->pid
, 0, event
, 0) < 0) {
3089 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, EINVAL
);
3092 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFADDR
;
3093 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFADDR
, GFP_ATOMIC
);
3096 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3097 __s32
*array
, int bytes
)
3099 memset(array
, 0, bytes
);
3100 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3101 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3102 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3103 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3104 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3105 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3106 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3107 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3108 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3109 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3110 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3111 #ifdef CONFIG_IPV6_PRIVACY
3112 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3113 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3114 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3115 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3116 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3118 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3121 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3122 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3124 struct net_device
*dev
= idev
->dev
;
3125 __s32
*array
= NULL
;
3126 struct ifinfomsg
*r
;
3127 struct nlmsghdr
*nlh
;
3128 unsigned char *b
= skb
->tail
;
3129 struct rtattr
*subattr
;
3130 __u32 mtu
= dev
->mtu
;
3131 struct ifla_cacheinfo ci
;
3133 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*r
), flags
);
3134 r
= NLMSG_DATA(nlh
);
3135 r
->ifi_family
= AF_INET6
;
3137 r
->ifi_type
= dev
->type
;
3138 r
->ifi_index
= dev
->ifindex
;
3139 r
->ifi_flags
= dev_get_flags(dev
);
3142 RTA_PUT(skb
, IFLA_IFNAME
, strlen(dev
->name
)+1, dev
->name
);
3145 RTA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3147 RTA_PUT(skb
, IFLA_MTU
, sizeof(mtu
), &mtu
);
3148 if (dev
->ifindex
!= dev
->iflink
)
3149 RTA_PUT(skb
, IFLA_LINK
, sizeof(int), &dev
->iflink
);
3151 subattr
= (struct rtattr
*)skb
->tail
;
3153 RTA_PUT(skb
, IFLA_PROTINFO
, 0, NULL
);
3155 /* return the device flags */
3156 RTA_PUT(skb
, IFLA_INET6_FLAGS
, sizeof(__u32
), &idev
->if_flags
);
3158 /* return interface cacheinfo */
3159 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3160 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3161 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3162 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3163 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3164 RTA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3166 /* return the device sysctl params */
3167 if ((array
= kmalloc(DEVCONF_MAX
* sizeof(*array
), GFP_ATOMIC
)) == NULL
)
3168 goto rtattr_failure
;
3169 ipv6_store_devconf(&idev
->cnf
, array
, DEVCONF_MAX
* sizeof(*array
));
3170 RTA_PUT(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(*array
), array
);
3172 /* XXX - Statistics/MC not implemented */
3173 subattr
->rta_len
= skb
->tail
- (u8
*)subattr
;
3175 nlh
->nlmsg_len
= skb
->tail
- b
;
3182 skb_trim(skb
, b
- skb
->data
);
3186 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3189 int s_idx
= cb
->args
[0];
3190 struct net_device
*dev
;
3191 struct inet6_dev
*idev
;
3193 read_lock(&dev_base_lock
);
3194 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3197 if ((idev
= in6_dev_get(dev
)) == NULL
)
3199 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3200 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3205 read_unlock(&dev_base_lock
);
3211 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3213 struct sk_buff
*skb
;
3215 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
)+128);
3217 skb
= alloc_skb(size
, GFP_ATOMIC
);
3219 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, ENOBUFS
);
3222 if (inet6_fill_ifinfo(skb
, idev
, current
->pid
, 0, event
, 0) < 0) {
3224 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, EINVAL
);
3227 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFINFO
;
3228 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFINFO
, GFP_ATOMIC
);
3231 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3232 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3233 int event
, unsigned int flags
)
3235 struct prefixmsg
*pmsg
;
3236 struct nlmsghdr
*nlh
;
3237 unsigned char *b
= skb
->tail
;
3238 struct prefix_cacheinfo ci
;
3240 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3241 pmsg
= NLMSG_DATA(nlh
);
3242 pmsg
->prefix_family
= AF_INET6
;
3243 pmsg
->prefix_pad1
= 0;
3244 pmsg
->prefix_pad2
= 0;
3245 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3246 pmsg
->prefix_len
= pinfo
->prefix_len
;
3247 pmsg
->prefix_type
= pinfo
->type
;
3248 pmsg
->prefix_pad3
= 0;
3250 pmsg
->prefix_flags
= 0;
3252 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3253 if (pinfo
->autoconf
)
3254 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3256 RTA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3258 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3259 ci
.valid_time
= ntohl(pinfo
->valid
);
3260 RTA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3262 nlh
->nlmsg_len
= skb
->tail
- b
;
3267 skb_trim(skb
, b
- skb
->data
);
3271 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3272 struct prefix_info
*pinfo
)
3274 struct sk_buff
*skb
;
3275 int size
= NLMSG_SPACE(sizeof(struct prefixmsg
)+128);
3277 skb
= alloc_skb(size
, GFP_ATOMIC
);
3279 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, ENOBUFS
);
3282 if (inet6_fill_prefix(skb
, idev
, pinfo
, current
->pid
, 0, event
, 0) < 0) {
3284 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, EINVAL
);
3287 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_PREFIX
;
3288 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_PREFIX
, GFP_ATOMIC
);
3291 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3292 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3293 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3294 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3295 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= inet6_dump_ifaddr
, },
3296 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3297 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3298 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3299 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3300 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3301 .dumpit
= inet6_dump_fib
, },
3304 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3306 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3310 ip6_ins_rt(ifp
->rt
, NULL
, NULL
, NULL
);
3311 if (ifp
->idev
->cnf
.forwarding
)
3312 addrconf_join_anycast(ifp
);
3315 if (ifp
->idev
->cnf
.forwarding
)
3316 addrconf_leave_anycast(ifp
);
3317 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3318 dst_hold(&ifp
->rt
->u
.dst
);
3319 if (ip6_del_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3320 dst_free(&ifp
->rt
->u
.dst
);
3325 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3327 read_lock_bh(&addrconf_lock
);
3328 if (likely(ifp
->idev
->dead
== 0))
3329 __ipv6_ifa_notify(event
, ifp
);
3330 read_unlock_bh(&addrconf_lock
);
3333 #ifdef CONFIG_SYSCTL
3336 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3337 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3339 int *valp
= ctl
->data
;
3343 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3345 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3346 if (valp
!= &ipv6_devconf
.forwarding
) {
3347 if ((!*valp
) ^ (!val
)) {
3348 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3351 dev_forward_change(idev
);
3354 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3355 addrconf_forward_change();
3358 rt6_purge_dflt_routers();
3364 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3365 int __user
*name
, int nlen
,
3366 void __user
*oldval
,
3367 size_t __user
*oldlenp
,
3368 void __user
*newval
, size_t newlen
,
3371 int *valp
= table
->data
;
3374 if (!newval
|| !newlen
)
3376 if (newlen
!= sizeof(int))
3378 if (get_user(new, (int __user
*)newval
))
3382 if (oldval
&& oldlenp
) {
3384 if (get_user(len
, oldlenp
))
3387 if (len
> table
->maxlen
)
3388 len
= table
->maxlen
;
3389 if (copy_to_user(oldval
, valp
, len
))
3391 if (put_user(len
, oldlenp
))
3396 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3397 if (valp
!= &ipv6_devconf
.forwarding
) {
3398 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3400 if (unlikely(idev
== NULL
))
3402 changed
= (!*valp
) ^ (!new);
3405 dev_forward_change(idev
);
3408 addrconf_forward_change();
3412 rt6_purge_dflt_routers();
3419 static struct addrconf_sysctl_table
3421 struct ctl_table_header
*sysctl_header
;
3422 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3423 ctl_table addrconf_dev
[2];
3424 ctl_table addrconf_conf_dir
[2];
3425 ctl_table addrconf_proto_dir
[2];
3426 ctl_table addrconf_root_dir
[2];
3427 } addrconf_sysctl
= {
3428 .sysctl_header
= NULL
,
3431 .ctl_name
= NET_IPV6_FORWARDING
,
3432 .procname
= "forwarding",
3433 .data
= &ipv6_devconf
.forwarding
,
3434 .maxlen
= sizeof(int),
3436 .proc_handler
= &addrconf_sysctl_forward
,
3437 .strategy
= &addrconf_sysctl_forward_strategy
,
3440 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3441 .procname
= "hop_limit",
3442 .data
= &ipv6_devconf
.hop_limit
,
3443 .maxlen
= sizeof(int),
3445 .proc_handler
= proc_dointvec
,
3448 .ctl_name
= NET_IPV6_MTU
,
3450 .data
= &ipv6_devconf
.mtu6
,
3451 .maxlen
= sizeof(int),
3453 .proc_handler
= &proc_dointvec
,
3456 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3457 .procname
= "accept_ra",
3458 .data
= &ipv6_devconf
.accept_ra
,
3459 .maxlen
= sizeof(int),
3461 .proc_handler
= &proc_dointvec
,
3464 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3465 .procname
= "accept_redirects",
3466 .data
= &ipv6_devconf
.accept_redirects
,
3467 .maxlen
= sizeof(int),
3469 .proc_handler
= &proc_dointvec
,
3472 .ctl_name
= NET_IPV6_AUTOCONF
,
3473 .procname
= "autoconf",
3474 .data
= &ipv6_devconf
.autoconf
,
3475 .maxlen
= sizeof(int),
3477 .proc_handler
= &proc_dointvec
,
3480 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3481 .procname
= "dad_transmits",
3482 .data
= &ipv6_devconf
.dad_transmits
,
3483 .maxlen
= sizeof(int),
3485 .proc_handler
= &proc_dointvec
,
3488 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3489 .procname
= "router_solicitations",
3490 .data
= &ipv6_devconf
.rtr_solicits
,
3491 .maxlen
= sizeof(int),
3493 .proc_handler
= &proc_dointvec
,
3496 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3497 .procname
= "router_solicitation_interval",
3498 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3499 .maxlen
= sizeof(int),
3501 .proc_handler
= &proc_dointvec_jiffies
,
3502 .strategy
= &sysctl_jiffies
,
3505 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3506 .procname
= "router_solicitation_delay",
3507 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3508 .maxlen
= sizeof(int),
3510 .proc_handler
= &proc_dointvec_jiffies
,
3511 .strategy
= &sysctl_jiffies
,
3514 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3515 .procname
= "force_mld_version",
3516 .data
= &ipv6_devconf
.force_mld_version
,
3517 .maxlen
= sizeof(int),
3519 .proc_handler
= &proc_dointvec
,
3521 #ifdef CONFIG_IPV6_PRIVACY
3523 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3524 .procname
= "use_tempaddr",
3525 .data
= &ipv6_devconf
.use_tempaddr
,
3526 .maxlen
= sizeof(int),
3528 .proc_handler
= &proc_dointvec
,
3531 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3532 .procname
= "temp_valid_lft",
3533 .data
= &ipv6_devconf
.temp_valid_lft
,
3534 .maxlen
= sizeof(int),
3536 .proc_handler
= &proc_dointvec
,
3539 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3540 .procname
= "temp_prefered_lft",
3541 .data
= &ipv6_devconf
.temp_prefered_lft
,
3542 .maxlen
= sizeof(int),
3544 .proc_handler
= &proc_dointvec
,
3547 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3548 .procname
= "regen_max_retry",
3549 .data
= &ipv6_devconf
.regen_max_retry
,
3550 .maxlen
= sizeof(int),
3552 .proc_handler
= &proc_dointvec
,
3555 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3556 .procname
= "max_desync_factor",
3557 .data
= &ipv6_devconf
.max_desync_factor
,
3558 .maxlen
= sizeof(int),
3560 .proc_handler
= &proc_dointvec
,
3564 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3565 .procname
= "max_addresses",
3566 .data
= &ipv6_devconf
.max_addresses
,
3567 .maxlen
= sizeof(int),
3569 .proc_handler
= &proc_dointvec
,
3572 .ctl_name
= 0, /* sentinel */
3577 .ctl_name
= NET_PROTO_CONF_ALL
,
3580 .child
= addrconf_sysctl
.addrconf_vars
,
3583 .ctl_name
= 0, /* sentinel */
3586 .addrconf_conf_dir
= {
3588 .ctl_name
= NET_IPV6_CONF
,
3591 .child
= addrconf_sysctl
.addrconf_dev
,
3594 .ctl_name
= 0, /* sentinel */
3597 .addrconf_proto_dir
= {
3599 .ctl_name
= NET_IPV6
,
3602 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3605 .ctl_name
= 0, /* sentinel */
3608 .addrconf_root_dir
= {
3610 .ctl_name
= CTL_NET
,
3613 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3616 .ctl_name
= 0, /* sentinel */
3621 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3624 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3625 struct addrconf_sysctl_table
*t
;
3626 char *dev_name
= NULL
;
3628 t
= kmalloc(sizeof(*t
), GFP_KERNEL
);
3631 memcpy(t
, &addrconf_sysctl
, sizeof(*t
));
3632 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3633 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3634 t
->addrconf_vars
[i
].de
= NULL
;
3635 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3638 dev_name
= dev
->name
;
3639 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3641 dev_name
= "default";
3642 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3646 * Make a copy of dev_name, because '.procname' is regarded as const
3647 * by sysctl and we wouldn't want anyone to change it under our feet
3648 * (see SIOCSIFNAME).
3650 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3654 t
->addrconf_dev
[0].procname
= dev_name
;
3656 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3657 t
->addrconf_dev
[0].de
= NULL
;
3658 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3659 t
->addrconf_conf_dir
[0].de
= NULL
;
3660 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3661 t
->addrconf_proto_dir
[0].de
= NULL
;
3662 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3663 t
->addrconf_root_dir
[0].de
= NULL
;
3665 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
, 0);
3666 if (t
->sysctl_header
== NULL
)
3681 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3684 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3686 unregister_sysctl_table(t
->sysctl_header
);
3687 kfree(t
->addrconf_dev
[0].procname
);
3699 int register_inet6addr_notifier(struct notifier_block
*nb
)
3701 return notifier_chain_register(&inet6addr_chain
, nb
);
3704 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
3706 return notifier_chain_unregister(&inet6addr_chain
,nb
);
3710 * Init / cleanup code
3713 int __init
addrconf_init(void)
3717 /* The addrconf netdev notifier requires that loopback_dev
3718 * has it's ipv6 private information allocated and setup
3719 * before it can bring up and give link-local addresses
3720 * to other devices which are up.
3722 * Unfortunately, loopback_dev is not necessarily the first
3723 * entry in the global dev_base list of net devices. In fact,
3724 * it is likely to be the very last entry on that list.
3725 * So this causes the notifier registry below to try and
3726 * give link-local addresses to all devices besides loopback_dev
3727 * first, then loopback_dev, which cases all the non-loopback_dev
3728 * devices to fail to get a link-local address.
3730 * So, as a temporary fix, allocate the ipv6 structure for
3731 * loopback_dev first by hand.
3732 * Longer term, all of the dependencies ipv6 has upon the loopback
3733 * device and it being up should be removed.
3736 if (!ipv6_add_dev(&loopback_dev
))
3742 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
3744 register_netdevice_notifier(&ipv6_dev_notf
);
3747 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
3748 #ifdef CONFIG_SYSCTL
3749 addrconf_sysctl
.sysctl_header
=
3750 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
, 0);
3751 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
3757 void __exit
addrconf_cleanup(void)
3759 struct net_device
*dev
;
3760 struct inet6_dev
*idev
;
3761 struct inet6_ifaddr
*ifa
;
3764 unregister_netdevice_notifier(&ipv6_dev_notf
);
3766 rtnetlink_links
[PF_INET6
] = NULL
;
3767 #ifdef CONFIG_SYSCTL
3768 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
3769 addrconf_sysctl_unregister(&ipv6_devconf
);
3778 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
3779 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3781 addrconf_ifdown(dev
, 1);
3783 addrconf_ifdown(&loopback_dev
, 2);
3789 write_lock_bh(&addrconf_hash_lock
);
3790 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3791 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
3792 struct inet6_ifaddr
*bifa
;
3795 ifa
= ifa
->lst_next
;
3796 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
3797 /* Do not free it; something is wrong.
3798 Now we can investigate it with debugger.
3802 write_unlock_bh(&addrconf_hash_lock
);
3804 del_timer(&addr_chk_timer
);
3808 #ifdef CONFIG_PROC_FS
3809 proc_net_remove("if_inet6");