2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/sched.h>
48 #include <linux/net.h>
49 #include <linux/in6.h>
50 #include <linux/netdevice.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <linux/if_tunnel.h>
76 #include <linux/rtnetlink.h>
78 #ifdef CONFIG_IPV6_PRIVACY
79 #include <linux/random.h>
82 #include <asm/uaccess.h>
84 #include <linux/proc_fs.h>
85 #include <linux/seq_file.h>
87 /* Set to 3 to get tracing... */
91 #define ADBG(x) printk x
96 #define INFINITY_LIFE_TIME 0xFFFFFFFF
97 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
100 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
101 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
104 #ifdef CONFIG_IPV6_PRIVACY
105 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
106 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
107 static void ipv6_regen_rndid(unsigned long data
);
109 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
112 static int ipv6_count_addresses(struct inet6_dev
*idev
);
115 * Configured unicast address hash table
117 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
118 static DEFINE_RWLOCK(addrconf_hash_lock
);
120 /* Protects inet6 devices */
121 DEFINE_RWLOCK(addrconf_lock
);
123 static void addrconf_verify(unsigned long);
125 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
126 static DEFINE_SPINLOCK(addrconf_verify_lock
);
128 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
129 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
131 static int addrconf_ifdown(struct net_device
*dev
, int how
);
133 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
134 static void addrconf_dad_timer(unsigned long data
);
135 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
136 static void addrconf_dad_run(struct inet6_dev
*idev
);
137 static void addrconf_rs_timer(unsigned long data
);
138 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
141 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
142 struct prefix_info
*pinfo
);
143 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
145 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
147 struct ipv6_devconf ipv6_devconf
= {
149 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
150 .mtu6
= IPV6_MIN_MTU
,
152 .accept_redirects
= 1,
154 .force_mld_version
= 0,
156 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
157 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
158 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
159 #ifdef CONFIG_IPV6_PRIVACY
161 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
162 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
163 .regen_max_retry
= REGEN_MAX_RETRY
,
164 .max_desync_factor
= MAX_DESYNC_FACTOR
,
166 .max_addresses
= IPV6_MAX_ADDRESSES
,
167 .accept_ra_defrtr
= 1,
168 .accept_ra_pinfo
= 1,
169 #ifdef CONFIG_IPV6_ROUTER_PREF
170 .accept_ra_rtr_pref
= 1,
171 .rtr_probe_interval
= 60 * HZ
,
172 #ifdef CONFIG_IPV6_ROUTE_INFO
173 .accept_ra_rt_info_max_plen
= 0,
178 static struct ipv6_devconf ipv6_devconf_dflt
= {
180 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
181 .mtu6
= IPV6_MIN_MTU
,
183 .accept_redirects
= 1,
186 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
187 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
188 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
189 #ifdef CONFIG_IPV6_PRIVACY
191 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
192 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
193 .regen_max_retry
= REGEN_MAX_RETRY
,
194 .max_desync_factor
= MAX_DESYNC_FACTOR
,
196 .max_addresses
= IPV6_MAX_ADDRESSES
,
197 .accept_ra_defrtr
= 1,
198 .accept_ra_pinfo
= 1,
199 #ifdef CONFIG_IPV6_ROUTER_PREF
200 .accept_ra_rtr_pref
= 1,
201 .rtr_probe_interval
= 60 * HZ
,
202 #ifdef CONFIG_IPV6_ROUTE_INFO
203 .accept_ra_rt_info_max_plen
= 0,
208 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
210 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
212 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
214 #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
216 static inline unsigned ipv6_addr_scope2type(unsigned scope
)
219 case IPV6_ADDR_SCOPE_NODELOCAL
:
220 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL
) |
222 case IPV6_ADDR_SCOPE_LINKLOCAL
:
223 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
) |
224 IPV6_ADDR_LINKLOCAL
);
225 case IPV6_ADDR_SCOPE_SITELOCAL
:
226 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
) |
227 IPV6_ADDR_SITELOCAL
);
229 return IPV6_ADDR_SCOPE_TYPE(scope
);
232 int __ipv6_addr_type(const struct in6_addr
*addr
)
236 st
= addr
->s6_addr32
[0];
238 /* Consider all addresses with the first three bits different of
239 000 and 111 as unicasts.
241 if ((st
& htonl(0xE0000000)) != htonl(0x00000000) &&
242 (st
& htonl(0xE0000000)) != htonl(0xE0000000))
243 return (IPV6_ADDR_UNICAST
|
244 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
));
246 if ((st
& htonl(0xFF000000)) == htonl(0xFF000000)) {
248 /* addr-select 3.1 */
249 return (IPV6_ADDR_MULTICAST
|
250 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr
)));
253 if ((st
& htonl(0xFFC00000)) == htonl(0xFE800000))
254 return (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_UNICAST
|
255 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.1 */
256 if ((st
& htonl(0xFFC00000)) == htonl(0xFEC00000))
257 return (IPV6_ADDR_SITELOCAL
| IPV6_ADDR_UNICAST
|
258 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL
)); /* addr-select 3.1 */
260 if ((addr
->s6_addr32
[0] | addr
->s6_addr32
[1]) == 0) {
261 if (addr
->s6_addr32
[2] == 0) {
262 if (addr
->s6_addr32
[3] == 0)
263 return IPV6_ADDR_ANY
;
265 if (addr
->s6_addr32
[3] == htonl(0x00000001))
266 return (IPV6_ADDR_LOOPBACK
| IPV6_ADDR_UNICAST
|
267 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL
)); /* addr-select 3.4 */
269 return (IPV6_ADDR_COMPATv4
| IPV6_ADDR_UNICAST
|
270 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
273 if (addr
->s6_addr32
[2] == htonl(0x0000ffff))
274 return (IPV6_ADDR_MAPPED
|
275 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.3 */
278 return (IPV6_ADDR_RESERVED
|
279 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL
)); /* addr-select 3.4 */
282 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
284 if (del_timer(&ifp
->timer
))
288 enum addrconf_timer_t
295 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
296 enum addrconf_timer_t what
,
299 if (!del_timer(&ifp
->timer
))
304 ifp
->timer
.function
= addrconf_dad_timer
;
307 ifp
->timer
.function
= addrconf_rs_timer
;
311 ifp
->timer
.expires
= jiffies
+ when
;
312 add_timer(&ifp
->timer
);
315 /* Nobody refers to this device, we may destroy it. */
317 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
319 struct net_device
*dev
= idev
->dev
;
320 BUG_TRAP(idev
->addr_list
==NULL
);
321 BUG_TRAP(idev
->mc_list
==NULL
);
322 #ifdef NET_REFCNT_DEBUG
323 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
327 printk("Freeing alive inet6 device %p\n", idev
);
330 snmp6_free_dev(idev
);
334 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
336 struct inet6_dev
*ndev
;
340 if (dev
->mtu
< IPV6_MIN_MTU
)
343 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
348 rwlock_init(&ndev
->lock
);
350 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
351 ndev
->cnf
.mtu6
= dev
->mtu
;
352 ndev
->cnf
.sysctl
= NULL
;
353 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
354 if (ndev
->nd_parms
== NULL
) {
358 /* We refer to the device */
361 if (snmp6_alloc_dev(ndev
) < 0) {
363 "%s(): cannot allocate memory for statistics; dev=%s.\n",
364 __FUNCTION__
, dev
->name
));
365 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
367 in6_dev_finish_destroy(ndev
);
371 if (snmp6_register_dev(ndev
) < 0) {
373 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
374 __FUNCTION__
, dev
->name
));
375 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
377 in6_dev_finish_destroy(ndev
);
381 /* One reference from device. We must do this before
382 * we invoke __ipv6_regen_rndid().
386 #ifdef CONFIG_IPV6_PRIVACY
387 init_timer(&ndev
->regen_timer
);
388 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
389 ndev
->regen_timer
.data
= (unsigned long) ndev
;
390 if ((dev
->flags
&IFF_LOOPBACK
) ||
391 dev
->type
== ARPHRD_TUNNEL
||
392 dev
->type
== ARPHRD_NONE
||
393 dev
->type
== ARPHRD_SIT
) {
395 "%s: Disabled Privacy Extensions\n",
397 ndev
->cnf
.use_tempaddr
= -1;
400 ipv6_regen_rndid((unsigned long) ndev
);
404 if (netif_carrier_ok(dev
))
405 ndev
->if_flags
|= IF_READY
;
407 write_lock_bh(&addrconf_lock
);
409 write_unlock_bh(&addrconf_lock
);
411 ipv6_mc_init_dev(ndev
);
412 ndev
->tstamp
= jiffies
;
414 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
415 NET_IPV6_NEIGH
, "ipv6",
416 &ndisc_ifinfo_sysctl_change
,
418 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
423 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
425 struct inet6_dev
*idev
;
429 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
430 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
434 if (dev
->flags
&IFF_UP
)
440 static void dev_forward_change(struct inet6_dev
*idev
)
442 struct net_device
*dev
;
443 struct inet6_ifaddr
*ifa
;
444 struct in6_addr addr
;
449 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
450 ipv6_addr_all_routers(&addr
);
452 if (idev
->cnf
.forwarding
)
453 ipv6_dev_mc_inc(dev
, &addr
);
455 ipv6_dev_mc_dec(dev
, &addr
);
457 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
458 if (idev
->cnf
.forwarding
)
459 addrconf_join_anycast(ifa
);
461 addrconf_leave_anycast(ifa
);
466 static void addrconf_forward_change(void)
468 struct net_device
*dev
;
469 struct inet6_dev
*idev
;
471 read_lock(&dev_base_lock
);
472 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
473 read_lock(&addrconf_lock
);
474 idev
= __in6_dev_get(dev
);
476 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
477 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
479 dev_forward_change(idev
);
481 read_unlock(&addrconf_lock
);
483 read_unlock(&dev_base_lock
);
487 /* Nobody refers to this ifaddr, destroy it */
489 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
491 BUG_TRAP(ifp
->if_next
==NULL
);
492 BUG_TRAP(ifp
->lst_next
==NULL
);
493 #ifdef NET_REFCNT_DEBUG
494 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
497 in6_dev_put(ifp
->idev
);
499 if (del_timer(&ifp
->timer
))
500 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
503 printk("Freeing alive inet6 address %p\n", ifp
);
506 dst_release(&ifp
->rt
->u
.dst
);
511 /* On success it returns ifp with increased reference count */
513 static struct inet6_ifaddr
*
514 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
515 int scope
, u32 flags
)
517 struct inet6_ifaddr
*ifa
= NULL
;
522 read_lock_bh(&addrconf_lock
);
524 err
= -ENODEV
; /*XXX*/
528 write_lock(&addrconf_hash_lock
);
530 /* Ignore adding duplicate addresses on an interface */
531 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
532 ADBG(("ipv6_add_addr: already assigned\n"));
537 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
540 ADBG(("ipv6_add_addr: malloc failed\n"));
545 rt
= addrconf_dst_alloc(idev
, addr
, 0);
551 ipv6_addr_copy(&ifa
->addr
, addr
);
553 spin_lock_init(&ifa
->lock
);
554 init_timer(&ifa
->timer
);
555 ifa
->timer
.data
= (unsigned long) ifa
;
557 ifa
->prefix_len
= pfxlen
;
558 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
559 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
566 /* Add to big hash table */
567 hash
= ipv6_addr_hash(addr
);
569 ifa
->lst_next
= inet6_addr_lst
[hash
];
570 inet6_addr_lst
[hash
] = ifa
;
572 write_unlock(&addrconf_hash_lock
);
574 write_lock(&idev
->lock
);
575 /* Add to inet6_dev unicast addr list. */
576 ifa
->if_next
= idev
->addr_list
;
577 idev
->addr_list
= ifa
;
579 #ifdef CONFIG_IPV6_PRIVACY
580 if (ifa
->flags
&IFA_F_TEMPORARY
) {
581 ifa
->tmp_next
= idev
->tempaddr_list
;
582 idev
->tempaddr_list
= ifa
;
590 write_unlock(&idev
->lock
);
592 read_unlock_bh(&addrconf_lock
);
594 if (likely(err
== 0))
595 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
603 write_unlock(&addrconf_hash_lock
);
607 /* This function wants to get referenced ifp and releases it before return */
609 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
611 struct inet6_ifaddr
*ifa
, **ifap
;
612 struct inet6_dev
*idev
= ifp
->idev
;
614 int deleted
= 0, onlink
= 0;
615 unsigned long expires
= jiffies
;
617 hash
= ipv6_addr_hash(&ifp
->addr
);
621 write_lock_bh(&addrconf_hash_lock
);
622 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
623 ifap
= &ifa
->lst_next
) {
625 *ifap
= ifa
->lst_next
;
627 ifa
->lst_next
= NULL
;
631 write_unlock_bh(&addrconf_hash_lock
);
633 write_lock_bh(&idev
->lock
);
634 #ifdef CONFIG_IPV6_PRIVACY
635 if (ifp
->flags
&IFA_F_TEMPORARY
) {
636 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
637 ifap
= &ifa
->tmp_next
) {
639 *ifap
= ifa
->tmp_next
;
641 in6_ifa_put(ifp
->ifpub
);
645 ifa
->tmp_next
= NULL
;
652 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
654 *ifap
= ifa
->if_next
;
657 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
661 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
662 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
664 if (ifa
->flags
& IFA_F_PERMANENT
) {
669 unsigned long lifetime
;
674 spin_lock(&ifa
->lock
);
675 lifetime
= min_t(unsigned long,
676 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
677 if (time_before(expires
,
678 ifa
->tstamp
+ lifetime
* HZ
))
679 expires
= ifa
->tstamp
+ lifetime
* HZ
;
680 spin_unlock(&ifa
->lock
);
684 ifap
= &ifa
->if_next
;
686 write_unlock_bh(&idev
->lock
);
688 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
690 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
692 addrconf_del_timer(ifp
);
695 * Purge or update corresponding prefix
697 * 1) we don't purge prefix here if address was not permanent.
698 * prefix is managed by its own lifetime.
699 * 2) if there're no addresses, delete prefix.
700 * 3) if there're still other permanent address(es),
701 * corresponding prefix is still permanent.
702 * 4) otherwise, update prefix lifetime to the
703 * longest valid lifetime among the corresponding
704 * addresses on the device.
705 * Note: subsequent RA will update lifetime.
709 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
710 struct in6_addr prefix
;
713 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
714 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
716 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
718 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
720 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
721 rt
->rt6i_expires
= expires
;
722 rt
->rt6i_flags
|= RTF_EXPIRES
;
725 dst_release(&rt
->u
.dst
);
731 #ifdef CONFIG_IPV6_PRIVACY
732 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
734 struct inet6_dev
*idev
= ifp
->idev
;
735 struct in6_addr addr
, *tmpaddr
;
736 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
741 write_lock(&idev
->lock
);
743 spin_lock_bh(&ift
->lock
);
744 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
745 spin_unlock_bh(&ift
->lock
);
752 if (idev
->cnf
.use_tempaddr
<= 0) {
753 write_unlock(&idev
->lock
);
755 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
760 spin_lock_bh(&ifp
->lock
);
761 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
762 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
763 spin_unlock_bh(&ifp
->lock
);
764 write_unlock(&idev
->lock
);
766 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
772 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
773 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
774 spin_unlock_bh(&ifp
->lock
);
775 write_unlock(&idev
->lock
);
777 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
783 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
784 tmp_valid_lft
= min_t(__u32
,
786 idev
->cnf
.temp_valid_lft
);
787 tmp_prefered_lft
= min_t(__u32
,
789 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
790 tmp_plen
= ifp
->prefix_len
;
791 max_addresses
= idev
->cnf
.max_addresses
;
792 tmp_cstamp
= ifp
->cstamp
;
793 tmp_tstamp
= ifp
->tstamp
;
794 spin_unlock_bh(&ifp
->lock
);
796 write_unlock(&idev
->lock
);
797 ift
= !max_addresses
||
798 ipv6_count_addresses(idev
) < max_addresses
?
799 ipv6_add_addr(idev
, &addr
, tmp_plen
,
800 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
801 if (!ift
|| IS_ERR(ift
)) {
805 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
807 write_lock(&idev
->lock
);
811 spin_lock_bh(&ift
->lock
);
813 ift
->valid_lft
= tmp_valid_lft
;
814 ift
->prefered_lft
= tmp_prefered_lft
;
815 ift
->cstamp
= tmp_cstamp
;
816 ift
->tstamp
= tmp_tstamp
;
817 spin_unlock_bh(&ift
->lock
);
819 addrconf_dad_start(ift
, 0);
828 * Choose an appropriate source address (RFC3484)
830 struct ipv6_saddr_score
{
838 #define IPV6_SADDR_SCORE_LOCAL 0x0001
839 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
840 #define IPV6_SADDR_SCORE_HOA 0x0008
841 #define IPV6_SADDR_SCORE_OIF 0x0010
842 #define IPV6_SADDR_SCORE_LABEL 0x0020
843 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
845 static int inline ipv6_saddr_preferred(int type
)
847 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
848 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
853 /* static matching label */
854 static int inline ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
857 * prefix (longest match) label
858 * -----------------------------
867 if (type
& IPV6_ADDR_LOOPBACK
)
869 else if (type
& IPV6_ADDR_COMPATv4
)
871 else if (type
& IPV6_ADDR_MAPPED
)
873 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
875 else if (addr
->s6_addr16
[0] == htons(0x2002))
877 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
882 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
883 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
885 struct ipv6_saddr_score hiscore
;
886 struct inet6_ifaddr
*ifa_result
= NULL
;
887 int daddr_type
= __ipv6_addr_type(daddr
);
888 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
889 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
890 struct net_device
*dev
;
892 memset(&hiscore
, 0, sizeof(hiscore
));
894 read_lock(&dev_base_lock
);
895 read_lock(&addrconf_lock
);
897 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
898 struct inet6_dev
*idev
;
899 struct inet6_ifaddr
*ifa
;
901 /* Rule 0: Candidate Source Address (section 4)
902 * - multicast and link-local destination address,
903 * the set of candidate source address MUST only
904 * include addresses assigned to interfaces
905 * belonging to the same link as the outgoing
907 * (- For site-local destination addresses, the
908 * set of candidate source addresses MUST only
909 * include addresses assigned to interfaces
910 * belonging to the same site as the outgoing
913 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
914 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
915 daddr_dev
&& dev
!= daddr_dev
)
918 idev
= __in6_dev_get(dev
);
922 read_lock_bh(&idev
->lock
);
923 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
924 struct ipv6_saddr_score score
;
926 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
929 * - Tentative Address (RFC2462 section 5.4)
930 * - A tentative address is not considered
931 * "assigned to an interface" in the traditional
933 * - Candidate Source Address (section 4)
934 * - In any case, anycast addresses, multicast
935 * addresses, and the unspecified address MUST
936 * NOT be included in a candidate set.
938 if (ifa
->flags
& IFA_F_TENTATIVE
)
940 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
941 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
942 LIMIT_NETDEBUG(KERN_DEBUG
943 "ADDRCONF: unspecified / multicast address"
944 "assigned as unicast address on %s",
954 if (ifa_result
== NULL
) {
955 /* record it if the first available entry */
959 /* Rule 1: Prefer same address */
960 if (hiscore
.rule
< 1) {
961 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
962 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
965 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
966 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
967 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
972 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
976 /* Rule 2: Prefer appropriate scope */
977 if (hiscore
.rule
< 2) {
978 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
981 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
982 if (hiscore
.scope
< score
.scope
) {
983 if (hiscore
.scope
< daddr_scope
) {
988 } else if (score
.scope
< hiscore
.scope
) {
989 if (score
.scope
< daddr_scope
)
997 /* Rule 3: Avoid deprecated address */
998 if (hiscore
.rule
< 3) {
999 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1000 !(ifa_result
->flags
& IFA_F_DEPRECATED
))
1001 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1004 if (ipv6_saddr_preferred(score
.addr_type
) ||
1005 !(ifa
->flags
& IFA_F_DEPRECATED
)) {
1006 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1007 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1012 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1016 /* Rule 4: Prefer home address -- not implemented yet */
1017 if (hiscore
.rule
< 4)
1020 /* Rule 5: Prefer outgoing interface */
1021 if (hiscore
.rule
< 5) {
1022 if (daddr_dev
== NULL
||
1023 daddr_dev
== ifa_result
->idev
->dev
)
1024 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1027 if (daddr_dev
== NULL
||
1028 daddr_dev
== ifa
->idev
->dev
) {
1029 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1030 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1035 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1039 /* Rule 6: Prefer matching label */
1040 if (hiscore
.rule
< 6) {
1041 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1042 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1045 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1046 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1047 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1052 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1056 #ifdef CONFIG_IPV6_PRIVACY
1057 /* Rule 7: Prefer public address
1058 * Note: prefer temprary address if use_tempaddr >= 2
1060 if (hiscore
.rule
< 7) {
1061 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1062 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1063 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1066 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1067 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1068 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1069 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1074 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1078 if (hiscore
.rule
< 7)
1081 /* Rule 8: Use longest matching prefix */
1082 if (hiscore
.rule
< 8) {
1083 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1086 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1087 if (score
.matchlen
> hiscore
.matchlen
) {
1092 else if (score
.matchlen
< hiscore
.matchlen
)
1096 /* Final Rule: choose first available one */
1100 in6_ifa_put(ifa_result
);
1105 read_unlock_bh(&idev
->lock
);
1107 read_unlock(&addrconf_lock
);
1108 read_unlock(&dev_base_lock
);
1111 return -EADDRNOTAVAIL
;
1113 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1114 in6_ifa_put(ifa_result
);
1119 int ipv6_get_saddr(struct dst_entry
*dst
,
1120 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1122 return ipv6_dev_get_saddr(dst
? ((struct rt6_info
*)dst
)->rt6i_idev
->dev
: NULL
, daddr
, saddr
);
1126 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
1128 struct inet6_dev
*idev
;
1129 int err
= -EADDRNOTAVAIL
;
1131 read_lock(&addrconf_lock
);
1132 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1133 struct inet6_ifaddr
*ifp
;
1135 read_lock_bh(&idev
->lock
);
1136 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1137 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1138 ipv6_addr_copy(addr
, &ifp
->addr
);
1143 read_unlock_bh(&idev
->lock
);
1145 read_unlock(&addrconf_lock
);
1149 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1152 struct inet6_ifaddr
*ifp
;
1154 read_lock_bh(&idev
->lock
);
1155 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1157 read_unlock_bh(&idev
->lock
);
1161 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1163 struct inet6_ifaddr
* ifp
;
1164 u8 hash
= ipv6_addr_hash(addr
);
1166 read_lock_bh(&addrconf_hash_lock
);
1167 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1168 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1169 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1170 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1171 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1175 read_unlock_bh(&addrconf_hash_lock
);
1180 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1182 struct inet6_ifaddr
* ifp
;
1183 u8 hash
= ipv6_addr_hash(addr
);
1185 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1186 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1187 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1194 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1196 struct inet6_ifaddr
* ifp
;
1197 u8 hash
= ipv6_addr_hash(addr
);
1199 read_lock_bh(&addrconf_hash_lock
);
1200 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1201 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1202 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1203 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1209 read_unlock_bh(&addrconf_hash_lock
);
1214 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1216 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1217 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1218 u32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1219 u32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1220 int sk_ipv6only
= ipv6_only_sock(sk
);
1221 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1222 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1223 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1225 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1228 if (addr_type2
== IPV6_ADDR_ANY
&&
1229 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1232 if (addr_type
== IPV6_ADDR_ANY
&&
1233 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1236 if (sk2_rcv_saddr6
&&
1237 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1240 if (addr_type
== IPV6_ADDR_MAPPED
&&
1242 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1248 /* Gets referenced address, destroys ifaddr */
1250 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1252 if (ifp
->flags
&IFA_F_PERMANENT
) {
1253 spin_lock_bh(&ifp
->lock
);
1254 addrconf_del_timer(ifp
);
1255 ifp
->flags
|= IFA_F_TENTATIVE
;
1256 spin_unlock_bh(&ifp
->lock
);
1258 #ifdef CONFIG_IPV6_PRIVACY
1259 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1260 struct inet6_ifaddr
*ifpub
;
1261 spin_lock_bh(&ifp
->lock
);
1264 in6_ifa_hold(ifpub
);
1265 spin_unlock_bh(&ifp
->lock
);
1266 ipv6_create_tempaddr(ifpub
, ifp
);
1269 spin_unlock_bh(&ifp
->lock
);
1277 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1279 if (net_ratelimit())
1280 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1281 addrconf_dad_stop(ifp
);
1284 /* Join to solicited addr multicast group. */
1286 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1288 struct in6_addr maddr
;
1290 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1293 addrconf_addr_solict_mult(addr
, &maddr
);
1294 ipv6_dev_mc_inc(dev
, &maddr
);
1297 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1299 struct in6_addr maddr
;
1301 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1304 addrconf_addr_solict_mult(addr
, &maddr
);
1305 __ipv6_dev_mc_dec(idev
, &maddr
);
1308 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1310 struct in6_addr addr
;
1311 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1312 if (ipv6_addr_any(&addr
))
1314 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1317 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1319 struct in6_addr addr
;
1320 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1321 if (ipv6_addr_any(&addr
))
1323 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1326 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1328 if (dev
->addr_len
!= ETH_ALEN
)
1330 memcpy(eui
, dev
->dev_addr
, 3);
1331 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1334 * The zSeries OSA network cards can be shared among various
1335 * OS instances, but the OSA cards have only one MAC address.
1336 * This leads to duplicate address conflicts in conjunction
1337 * with IPv6 if more than one instance uses the same card.
1339 * The driver for these cards can deliver a unique 16-bit
1340 * identifier for each instance sharing the same card. It is
1341 * placed instead of 0xFFFE in the interface identifier. The
1342 * "u" bit of the interface identifier is not inverted in this
1343 * case. Hence the resulting interface identifier has local
1344 * scope according to RFC2373.
1347 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1348 eui
[4] = dev
->dev_id
& 0xFF;
1357 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1359 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1360 if (dev
->addr_len
!= ARCNET_ALEN
)
1363 eui
[7] = *(u8
*)dev
->dev_addr
;
1367 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1369 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1371 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1376 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1378 switch (dev
->type
) {
1381 case ARPHRD_IEEE802_TR
:
1382 return addrconf_ifid_eui48(eui
, dev
);
1384 return addrconf_ifid_arcnet(eui
, dev
);
1385 case ARPHRD_INFINIBAND
:
1386 return addrconf_ifid_infiniband(eui
, dev
);
1391 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1394 struct inet6_ifaddr
*ifp
;
1396 read_lock_bh(&idev
->lock
);
1397 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1398 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1399 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1404 read_unlock_bh(&idev
->lock
);
1408 #ifdef CONFIG_IPV6_PRIVACY
1409 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1410 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1413 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1414 idev
->rndid
[0] &= ~0x02;
1417 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1418 * check if generated address is not inappropriate
1420 * - Reserved subnet anycast (RFC 2526)
1421 * 11111101 11....11 1xxxxxxx
1422 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1423 * 00-00-5E-FE-xx-xx-xx-xx
1425 * - XXX: already assigned to an address on the device
1427 if (idev
->rndid
[0] == 0xfd &&
1428 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1429 (idev
->rndid
[7]&0x80))
1431 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1432 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1434 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1441 static void ipv6_regen_rndid(unsigned long data
)
1443 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1444 unsigned long expires
;
1446 read_lock_bh(&addrconf_lock
);
1447 write_lock_bh(&idev
->lock
);
1452 if (__ipv6_regen_rndid(idev
) < 0)
1456 idev
->cnf
.temp_prefered_lft
* HZ
-
1457 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1458 if (time_before(expires
, jiffies
)) {
1460 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1465 if (!mod_timer(&idev
->regen_timer
, expires
))
1469 write_unlock_bh(&idev
->lock
);
1470 read_unlock_bh(&addrconf_lock
);
1474 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1477 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1478 ret
= __ipv6_regen_rndid(idev
);
1488 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1489 unsigned long expires
, u32 flags
)
1491 struct in6_rtmsg rtmsg
;
1493 memset(&rtmsg
, 0, sizeof(rtmsg
));
1494 ipv6_addr_copy(&rtmsg
.rtmsg_dst
, pfx
);
1495 rtmsg
.rtmsg_dst_len
= plen
;
1496 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1497 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1498 rtmsg
.rtmsg_info
= expires
;
1499 rtmsg
.rtmsg_flags
= RTF_UP
|flags
;
1500 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1502 /* Prevent useless cloning on PtP SIT.
1503 This thing is done here expecting that the whole
1504 class of non-broadcast devices need not cloning.
1506 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
&IFF_POINTOPOINT
))
1507 rtmsg
.rtmsg_flags
|= RTF_NONEXTHOP
;
1509 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1512 /* Create "default" multicast route to the interface */
1514 static void addrconf_add_mroute(struct net_device
*dev
)
1516 struct in6_rtmsg rtmsg
;
1518 memset(&rtmsg
, 0, sizeof(rtmsg
));
1519 ipv6_addr_set(&rtmsg
.rtmsg_dst
,
1520 htonl(0xFF000000), 0, 0, 0);
1521 rtmsg
.rtmsg_dst_len
= 8;
1522 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1523 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1524 rtmsg
.rtmsg_flags
= RTF_UP
;
1525 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1526 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1529 static void sit_route_add(struct net_device
*dev
)
1531 struct in6_rtmsg rtmsg
;
1533 memset(&rtmsg
, 0, sizeof(rtmsg
));
1535 rtmsg
.rtmsg_type
= RTMSG_NEWROUTE
;
1536 rtmsg
.rtmsg_metric
= IP6_RT_PRIO_ADDRCONF
;
1538 /* prefix length - 96 bits "::d.d.d.d" */
1539 rtmsg
.rtmsg_dst_len
= 96;
1540 rtmsg
.rtmsg_flags
= RTF_UP
|RTF_NONEXTHOP
;
1541 rtmsg
.rtmsg_ifindex
= dev
->ifindex
;
1543 ip6_route_add(&rtmsg
, NULL
, NULL
, NULL
);
1546 static void addrconf_add_lroute(struct net_device
*dev
)
1548 struct in6_addr addr
;
1550 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1551 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1554 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1556 struct inet6_dev
*idev
;
1560 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1563 /* Add default multicast route */
1564 addrconf_add_mroute(dev
);
1566 /* Add link local route */
1567 addrconf_add_lroute(dev
);
1571 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1573 struct prefix_info
*pinfo
;
1577 unsigned long rt_expires
;
1578 struct inet6_dev
*in6_dev
;
1580 pinfo
= (struct prefix_info
*) opt
;
1582 if (len
< sizeof(struct prefix_info
)) {
1583 ADBG(("addrconf: prefix option too short\n"));
1588 * Validation checks ([ADDRCONF], page 19)
1591 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1593 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1596 valid_lft
= ntohl(pinfo
->valid
);
1597 prefered_lft
= ntohl(pinfo
->prefered
);
1599 if (prefered_lft
> valid_lft
) {
1600 if (net_ratelimit())
1601 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1605 in6_dev
= in6_dev_get(dev
);
1607 if (in6_dev
== NULL
) {
1608 if (net_ratelimit())
1609 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1614 * Two things going on here:
1615 * 1) Add routes for on-link prefixes
1616 * 2) Configure prefixes with the auto flag set
1619 /* Avoid arithmetic overflow. Really, we could
1620 save rt_expires in seconds, likely valid_lft,
1621 but it would require division in fib gc, that it
1624 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1625 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1627 rt_expires
= valid_lft
* HZ
;
1630 * We convert this (in jiffies) to clock_t later.
1631 * Avoid arithmetic overflow there as well.
1632 * Overflow can happen only if HZ < USER_HZ.
1634 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1635 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1637 if (pinfo
->onlink
) {
1638 struct rt6_info
*rt
;
1639 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1641 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1642 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1643 if (valid_lft
== 0) {
1644 ip6_del_rt(rt
, NULL
, NULL
, NULL
);
1647 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1650 } else if (valid_lft
) {
1651 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1652 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1655 dst_release(&rt
->u
.dst
);
1658 /* Try to figure out our local address for this prefix */
1660 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1661 struct inet6_ifaddr
* ifp
;
1662 struct in6_addr addr
;
1663 int create
= 0, update_lft
= 0;
1665 if (pinfo
->prefix_len
== 64) {
1666 memcpy(&addr
, &pinfo
->prefix
, 8);
1667 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1668 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1669 in6_dev_put(in6_dev
);
1674 if (net_ratelimit())
1675 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1677 in6_dev_put(in6_dev
);
1682 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1684 if (ifp
== NULL
&& valid_lft
) {
1685 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1687 /* Do not allow to create too much of autoconfigured
1688 * addresses; this would be too easy way to crash kernel.
1690 if (!max_addresses
||
1691 ipv6_count_addresses(in6_dev
) < max_addresses
)
1692 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1693 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1695 if (!ifp
|| IS_ERR(ifp
)) {
1696 in6_dev_put(in6_dev
);
1700 update_lft
= create
= 1;
1701 ifp
->cstamp
= jiffies
;
1702 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1708 #ifdef CONFIG_IPV6_PRIVACY
1709 struct inet6_ifaddr
*ift
;
1713 /* update lifetime (RFC2462 5.5.3 e) */
1714 spin_lock(&ifp
->lock
);
1716 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1717 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1720 if (!update_lft
&& stored_lft
) {
1721 if (valid_lft
> MIN_VALID_LIFETIME
||
1722 valid_lft
> stored_lft
)
1724 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1725 /* valid_lft <= stored_lft is always true */
1729 valid_lft
= MIN_VALID_LIFETIME
;
1730 if (valid_lft
< prefered_lft
)
1731 prefered_lft
= valid_lft
;
1737 ifp
->valid_lft
= valid_lft
;
1738 ifp
->prefered_lft
= prefered_lft
;
1741 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1742 spin_unlock(&ifp
->lock
);
1744 if (!(flags
&IFA_F_TENTATIVE
))
1745 ipv6_ifa_notify(0, ifp
);
1747 spin_unlock(&ifp
->lock
);
1749 #ifdef CONFIG_IPV6_PRIVACY
1750 read_lock_bh(&in6_dev
->lock
);
1751 /* update all temporary addresses in the list */
1752 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1754 * When adjusting the lifetimes of an existing
1755 * temporary address, only lower the lifetimes.
1756 * Implementations must not increase the
1757 * lifetimes of an existing temporary address
1758 * when processing a Prefix Information Option.
1760 spin_lock(&ift
->lock
);
1762 if (ift
->valid_lft
> valid_lft
&&
1763 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1764 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1765 if (ift
->prefered_lft
> prefered_lft
&&
1766 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1767 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1768 spin_unlock(&ift
->lock
);
1769 if (!(flags
&IFA_F_TENTATIVE
))
1770 ipv6_ifa_notify(0, ift
);
1773 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1775 * When a new public address is created as described in [ADDRCONF],
1776 * also create a new temporary address.
1778 read_unlock_bh(&in6_dev
->lock
);
1779 ipv6_create_tempaddr(ifp
, NULL
);
1781 read_unlock_bh(&in6_dev
->lock
);
1788 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1789 in6_dev_put(in6_dev
);
1793 * Set destination address.
1794 * Special case for SIT interfaces where we create a new "virtual"
1797 int addrconf_set_dstaddr(void __user
*arg
)
1799 struct in6_ifreq ireq
;
1800 struct net_device
*dev
;
1806 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1809 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1815 if (dev
->type
== ARPHRD_SIT
) {
1818 struct ip_tunnel_parm p
;
1820 err
= -EADDRNOTAVAIL
;
1821 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1824 memset(&p
, 0, sizeof(p
));
1825 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1829 p
.iph
.protocol
= IPPROTO_IPV6
;
1831 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1833 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1834 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1839 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1841 err
= dev_open(dev
);
1851 * Manual configuration of address on an interface
1853 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
)
1855 struct inet6_ifaddr
*ifp
;
1856 struct inet6_dev
*idev
;
1857 struct net_device
*dev
;
1862 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1865 if (!(dev
->flags
&IFF_UP
))
1868 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1871 scope
= ipv6_addr_scope(pfx
);
1873 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, IFA_F_PERMANENT
);
1875 addrconf_dad_start(ifp
, 0);
1880 return PTR_ERR(ifp
);
1883 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1885 struct inet6_ifaddr
*ifp
;
1886 struct inet6_dev
*idev
;
1887 struct net_device
*dev
;
1889 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1892 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1895 read_lock_bh(&idev
->lock
);
1896 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1897 if (ifp
->prefix_len
== plen
&&
1898 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1900 read_unlock_bh(&idev
->lock
);
1904 /* If the last address is deleted administratively,
1905 disable IPv6 on this interface.
1907 if (idev
->addr_list
== NULL
)
1908 addrconf_ifdown(idev
->dev
, 1);
1912 read_unlock_bh(&idev
->lock
);
1913 return -EADDRNOTAVAIL
;
1917 int addrconf_add_ifaddr(void __user
*arg
)
1919 struct in6_ifreq ireq
;
1922 if (!capable(CAP_NET_ADMIN
))
1925 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1929 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1934 int addrconf_del_ifaddr(void __user
*arg
)
1936 struct in6_ifreq ireq
;
1939 if (!capable(CAP_NET_ADMIN
))
1942 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1946 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1951 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1953 struct inet6_ifaddr
* ifp
;
1954 struct in6_addr addr
;
1955 struct net_device
*dev
;
1960 memset(&addr
, 0, sizeof(struct in6_addr
));
1961 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1963 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1964 addr
.s6_addr32
[0] = htonl(0xfe800000);
1967 scope
= IPV6_ADDR_COMPATv4
;
1970 if (addr
.s6_addr32
[3]) {
1971 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1973 spin_lock_bh(&ifp
->lock
);
1974 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1975 spin_unlock_bh(&ifp
->lock
);
1976 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
1982 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
1983 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
1984 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
1985 struct in_ifaddr
* ifa
;
1989 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
1992 addr
.s6_addr32
[3] = ifa
->ifa_local
;
1994 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
1996 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
1997 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2001 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2006 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2009 spin_lock_bh(&ifp
->lock
);
2010 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2011 spin_unlock_bh(&ifp
->lock
);
2012 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2020 static void init_loopback(struct net_device
*dev
)
2022 struct inet6_dev
*idev
;
2023 struct inet6_ifaddr
* ifp
;
2029 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2030 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2034 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2036 spin_lock_bh(&ifp
->lock
);
2037 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2038 spin_unlock_bh(&ifp
->lock
);
2039 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2044 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2046 struct inet6_ifaddr
* ifp
;
2048 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
2050 addrconf_dad_start(ifp
, 0);
2055 static void addrconf_dev_config(struct net_device
*dev
)
2057 struct in6_addr addr
;
2058 struct inet6_dev
* idev
;
2062 if ((dev
->type
!= ARPHRD_ETHER
) &&
2063 (dev
->type
!= ARPHRD_FDDI
) &&
2064 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2065 (dev
->type
!= ARPHRD_ARCNET
) &&
2066 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2067 /* Alas, we support only Ethernet autoconfiguration. */
2071 idev
= addrconf_add_dev(dev
);
2075 memset(&addr
, 0, sizeof(struct in6_addr
));
2076 addr
.s6_addr32
[0] = htonl(0xFE800000);
2078 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2079 addrconf_add_linklocal(idev
, &addr
);
2082 static void addrconf_sit_config(struct net_device
*dev
)
2084 struct inet6_dev
*idev
;
2089 * Configure the tunnel with one of our IPv4
2090 * addresses... we should configure all of
2091 * our v4 addrs in the tunnel
2094 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2095 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2099 sit_add_v4_addrs(idev
);
2101 if (dev
->flags
&IFF_POINTOPOINT
) {
2102 addrconf_add_mroute(dev
);
2103 addrconf_add_lroute(dev
);
2109 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2111 struct in6_addr lladdr
;
2113 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
2114 addrconf_add_linklocal(idev
, &lladdr
);
2120 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2122 struct net_device
*link_dev
;
2124 /* first try to inherit the link-local address from the link device */
2125 if (idev
->dev
->iflink
&&
2126 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2127 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2130 /* then try to inherit it from any device */
2131 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2132 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2135 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2139 * Autoconfigure tunnel with a link-local address so routing protocols,
2140 * DHCPv6, MLD etc. can be run over the virtual link
2143 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2145 struct inet6_dev
*idev
;
2149 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2150 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2153 ip6_tnl_add_linklocal(idev
);
2156 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2159 struct net_device
*dev
= (struct net_device
*) data
;
2160 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2161 int run_pending
= 0;
2166 if (event
== NETDEV_UP
) {
2167 if (!netif_carrier_ok(dev
)) {
2168 /* device is not ready yet. */
2170 "ADDRCONF(NETDEV_UP): %s: "
2171 "link is not ready\n",
2177 idev
->if_flags
|= IF_READY
;
2179 if (!netif_carrier_ok(dev
)) {
2180 /* device is still not ready. */
2185 if (idev
->if_flags
& IF_READY
) {
2186 /* device is already configured. */
2189 idev
->if_flags
|= IF_READY
;
2193 "ADDRCONF(NETDEV_CHANGE): %s: "
2194 "link becomes ready\n",
2202 addrconf_sit_config(dev
);
2204 case ARPHRD_TUNNEL6
:
2205 addrconf_ip6_tnl_config(dev
);
2207 case ARPHRD_LOOPBACK
:
2212 addrconf_dev_config(dev
);
2217 addrconf_dad_run(idev
);
2219 /* If the MTU changed during the interface down, when the
2220 interface up, the changed MTU must be reflected in the
2221 idev as well as routers.
2223 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2224 rt6_mtu_change(dev
, dev
->mtu
);
2225 idev
->cnf
.mtu6
= dev
->mtu
;
2227 idev
->tstamp
= jiffies
;
2228 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2229 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2230 stop IPv6 on this interface.
2232 if (dev
->mtu
< IPV6_MIN_MTU
)
2233 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2237 case NETDEV_CHANGEMTU
:
2238 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2239 rt6_mtu_change(dev
, dev
->mtu
);
2240 idev
->cnf
.mtu6
= dev
->mtu
;
2244 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2247 case NETDEV_UNREGISTER
:
2249 * Remove all addresses from this interface.
2251 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2254 case NETDEV_CHANGENAME
:
2255 #ifdef CONFIG_SYSCTL
2257 addrconf_sysctl_unregister(&idev
->cnf
);
2258 neigh_sysctl_unregister(idev
->nd_parms
);
2259 neigh_sysctl_register(dev
, idev
->nd_parms
,
2260 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2261 &ndisc_ifinfo_sysctl_change
,
2263 addrconf_sysctl_register(idev
, &idev
->cnf
);
2273 * addrconf module should be notified of a device going up
2275 static struct notifier_block ipv6_dev_notf
= {
2276 .notifier_call
= addrconf_notify
,
2280 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2282 struct inet6_dev
*idev
;
2283 struct inet6_ifaddr
*ifa
, **bifa
;
2288 if (dev
== &loopback_dev
&& how
== 1)
2292 neigh_ifdown(&nd_tbl
, dev
);
2294 idev
= __in6_dev_get(dev
);
2298 /* Step 1: remove reference to ipv6 device from parent device.
2302 write_lock_bh(&addrconf_lock
);
2303 dev
->ip6_ptr
= NULL
;
2305 write_unlock_bh(&addrconf_lock
);
2307 /* Step 1.5: remove snmp6 entry */
2308 snmp6_unregister_dev(idev
);
2312 /* Step 2: clear hash table */
2313 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2314 bifa
= &inet6_addr_lst
[i
];
2316 write_lock_bh(&addrconf_hash_lock
);
2317 while ((ifa
= *bifa
) != NULL
) {
2318 if (ifa
->idev
== idev
) {
2319 *bifa
= ifa
->lst_next
;
2320 ifa
->lst_next
= NULL
;
2321 addrconf_del_timer(ifa
);
2325 bifa
= &ifa
->lst_next
;
2327 write_unlock_bh(&addrconf_hash_lock
);
2330 write_lock_bh(&idev
->lock
);
2332 /* Step 3: clear flags for stateless addrconf */
2334 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2336 /* Step 4: clear address list */
2337 #ifdef CONFIG_IPV6_PRIVACY
2338 if (how
== 1 && del_timer(&idev
->regen_timer
))
2341 /* clear tempaddr list */
2342 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2343 idev
->tempaddr_list
= ifa
->tmp_next
;
2344 ifa
->tmp_next
= NULL
;
2346 write_unlock_bh(&idev
->lock
);
2347 spin_lock_bh(&ifa
->lock
);
2350 in6_ifa_put(ifa
->ifpub
);
2353 spin_unlock_bh(&ifa
->lock
);
2355 write_lock_bh(&idev
->lock
);
2358 while ((ifa
= idev
->addr_list
) != NULL
) {
2359 idev
->addr_list
= ifa
->if_next
;
2360 ifa
->if_next
= NULL
;
2362 addrconf_del_timer(ifa
);
2363 write_unlock_bh(&idev
->lock
);
2365 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2368 write_lock_bh(&idev
->lock
);
2370 write_unlock_bh(&idev
->lock
);
2372 /* Step 5: Discard multicast list */
2375 ipv6_mc_destroy_dev(idev
);
2379 /* Step 5: netlink notification of this interface */
2380 idev
->tstamp
= jiffies
;
2381 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2383 /* Shot the device (if unregistered) */
2386 #ifdef CONFIG_SYSCTL
2387 addrconf_sysctl_unregister(&idev
->cnf
);
2388 neigh_sysctl_unregister(idev
->nd_parms
);
2390 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2391 neigh_ifdown(&nd_tbl
, dev
);
2397 static void addrconf_rs_timer(unsigned long data
)
2399 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2401 if (ifp
->idev
->cnf
.forwarding
)
2404 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2406 * Announcement received after solicitation
2412 spin_lock(&ifp
->lock
);
2413 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2414 struct in6_addr all_routers
;
2416 /* The wait after the last probe can be shorter */
2417 addrconf_mod_timer(ifp
, AC_RS
,
2418 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2419 ifp
->idev
->cnf
.rtr_solicit_delay
:
2420 ifp
->idev
->cnf
.rtr_solicit_interval
);
2421 spin_unlock(&ifp
->lock
);
2423 ipv6_addr_all_routers(&all_routers
);
2425 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2427 spin_unlock(&ifp
->lock
);
2429 * Note: we do not support deprecated "all on-link"
2430 * assumption any longer.
2432 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2433 ifp
->idev
->dev
->name
);
2441 * Duplicate Address Detection
2443 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2445 unsigned long rand_num
;
2446 struct inet6_dev
*idev
= ifp
->idev
;
2448 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2449 ifp
->probes
= idev
->cnf
.dad_transmits
;
2450 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2453 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2455 struct inet6_dev
*idev
= ifp
->idev
;
2456 struct net_device
*dev
= idev
->dev
;
2458 addrconf_join_solict(dev
, &ifp
->addr
);
2460 if (ifp
->prefix_len
!= 128 && (ifp
->flags
&IFA_F_PERMANENT
))
2461 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
, 0,
2464 net_srandom(ifp
->addr
.s6_addr32
[3]);
2466 read_lock_bh(&idev
->lock
);
2469 spin_lock_bh(&ifp
->lock
);
2471 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2472 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2473 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2474 spin_unlock_bh(&ifp
->lock
);
2475 read_unlock_bh(&idev
->lock
);
2477 addrconf_dad_completed(ifp
);
2481 if (!(idev
->if_flags
& IF_READY
)) {
2482 spin_unlock_bh(&ifp
->lock
);
2483 read_unlock_bh(&idev
->lock
);
2485 * If the defice is not ready:
2486 * - keep it tentative if it is a permanent address.
2487 * - otherwise, kill it.
2490 addrconf_dad_stop(ifp
);
2493 addrconf_dad_kick(ifp
);
2494 spin_unlock_bh(&ifp
->lock
);
2496 read_unlock_bh(&idev
->lock
);
2499 static void addrconf_dad_timer(unsigned long data
)
2501 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2502 struct inet6_dev
*idev
= ifp
->idev
;
2503 struct in6_addr unspec
;
2504 struct in6_addr mcaddr
;
2506 read_lock_bh(&idev
->lock
);
2508 read_unlock_bh(&idev
->lock
);
2511 spin_lock_bh(&ifp
->lock
);
2512 if (ifp
->probes
== 0) {
2514 * DAD was successful
2517 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2518 spin_unlock_bh(&ifp
->lock
);
2519 read_unlock_bh(&idev
->lock
);
2521 addrconf_dad_completed(ifp
);
2527 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2528 spin_unlock_bh(&ifp
->lock
);
2529 read_unlock_bh(&idev
->lock
);
2531 /* send a neighbour solicitation for our addr */
2532 memset(&unspec
, 0, sizeof(unspec
));
2533 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2534 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2539 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2541 struct net_device
* dev
= ifp
->idev
->dev
;
2544 * Configure the address for reception. Now it is valid.
2547 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2549 /* If added prefix is link local and forwarding is off,
2550 start sending router solicitations.
2553 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2554 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2555 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2556 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2557 struct in6_addr all_routers
;
2559 ipv6_addr_all_routers(&all_routers
);
2562 * If a host as already performed a random delay
2563 * [...] as part of DAD [...] there is no need
2564 * to delay again before sending the first RS
2566 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2568 spin_lock_bh(&ifp
->lock
);
2570 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2571 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2572 spin_unlock_bh(&ifp
->lock
);
2576 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2577 struct inet6_ifaddr
*ifp
;
2579 read_lock_bh(&idev
->lock
);
2580 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2581 spin_lock_bh(&ifp
->lock
);
2582 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2583 spin_unlock_bh(&ifp
->lock
);
2586 spin_unlock_bh(&ifp
->lock
);
2587 addrconf_dad_kick(ifp
);
2589 read_unlock_bh(&idev
->lock
);
2592 #ifdef CONFIG_PROC_FS
2593 struct if6_iter_state
{
2597 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2599 struct inet6_ifaddr
*ifa
= NULL
;
2600 struct if6_iter_state
*state
= seq
->private;
2602 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2603 ifa
= inet6_addr_lst
[state
->bucket
];
2610 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2612 struct if6_iter_state
*state
= seq
->private;
2614 ifa
= ifa
->lst_next
;
2616 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2617 ifa
= inet6_addr_lst
[state
->bucket
];
2623 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2625 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2628 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2630 return pos
? NULL
: ifa
;
2633 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2635 read_lock_bh(&addrconf_hash_lock
);
2636 return if6_get_idx(seq
, *pos
);
2639 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2641 struct inet6_ifaddr
*ifa
;
2643 ifa
= if6_get_next(seq
, v
);
2648 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2650 read_unlock_bh(&addrconf_hash_lock
);
2653 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2655 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2657 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2659 ifp
->idev
->dev
->ifindex
,
2663 ifp
->idev
->dev
->name
);
2667 static struct seq_operations if6_seq_ops
= {
2668 .start
= if6_seq_start
,
2669 .next
= if6_seq_next
,
2670 .show
= if6_seq_show
,
2671 .stop
= if6_seq_stop
,
2674 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2676 struct seq_file
*seq
;
2678 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2683 rc
= seq_open(file
, &if6_seq_ops
);
2687 seq
= file
->private_data
;
2696 static struct file_operations if6_fops
= {
2697 .owner
= THIS_MODULE
,
2698 .open
= if6_seq_open
,
2700 .llseek
= seq_lseek
,
2701 .release
= seq_release_private
,
2704 int __init
if6_proc_init(void)
2706 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2711 void if6_proc_exit(void)
2713 proc_net_remove("if_inet6");
2715 #endif /* CONFIG_PROC_FS */
2718 * Periodic address status verification
2721 static void addrconf_verify(unsigned long foo
)
2723 struct inet6_ifaddr
*ifp
;
2724 unsigned long now
, next
;
2727 spin_lock_bh(&addrconf_verify_lock
);
2729 next
= now
+ ADDR_CHECK_FREQUENCY
;
2731 del_timer(&addr_chk_timer
);
2733 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2736 read_lock(&addrconf_hash_lock
);
2737 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2739 #ifdef CONFIG_IPV6_PRIVACY
2740 unsigned long regen_advance
;
2743 if (ifp
->flags
& IFA_F_PERMANENT
)
2746 spin_lock(&ifp
->lock
);
2747 age
= (now
- ifp
->tstamp
) / HZ
;
2749 #ifdef CONFIG_IPV6_PRIVACY
2750 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2751 ifp
->idev
->cnf
.dad_transmits
*
2752 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2755 if (age
>= ifp
->valid_lft
) {
2756 spin_unlock(&ifp
->lock
);
2758 read_unlock(&addrconf_hash_lock
);
2761 } else if (age
>= ifp
->prefered_lft
) {
2762 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2765 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2767 ifp
->flags
|= IFA_F_DEPRECATED
;
2770 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2771 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2773 spin_unlock(&ifp
->lock
);
2777 read_unlock(&addrconf_hash_lock
);
2779 ipv6_ifa_notify(0, ifp
);
2783 #ifdef CONFIG_IPV6_PRIVACY
2784 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2785 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2786 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2787 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2788 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2789 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2790 if (!ifp
->regen_count
&& ifpub
) {
2793 in6_ifa_hold(ifpub
);
2794 spin_unlock(&ifp
->lock
);
2795 read_unlock(&addrconf_hash_lock
);
2796 spin_lock(&ifpub
->lock
);
2797 ifpub
->regen_count
= 0;
2798 spin_unlock(&ifpub
->lock
);
2799 ipv6_create_tempaddr(ifpub
, ifp
);
2804 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2805 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2806 spin_unlock(&ifp
->lock
);
2809 /* ifp->prefered_lft <= ifp->valid_lft */
2810 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2811 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2812 spin_unlock(&ifp
->lock
);
2815 read_unlock(&addrconf_hash_lock
);
2818 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2819 add_timer(&addr_chk_timer
);
2820 spin_unlock_bh(&addrconf_verify_lock
);
2824 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2826 struct rtattr
**rta
= arg
;
2827 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2828 struct in6_addr
*pfx
;
2831 if (rta
[IFA_ADDRESS
-1]) {
2832 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2834 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2836 if (rta
[IFA_LOCAL
-1]) {
2837 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2839 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2844 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2848 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2850 struct rtattr
**rta
= arg
;
2851 struct ifaddrmsg
*ifm
= NLMSG_DATA(nlh
);
2852 struct in6_addr
*pfx
;
2855 if (rta
[IFA_ADDRESS
-1]) {
2856 if (RTA_PAYLOAD(rta
[IFA_ADDRESS
-1]) < sizeof(*pfx
))
2858 pfx
= RTA_DATA(rta
[IFA_ADDRESS
-1]);
2860 if (rta
[IFA_LOCAL
-1]) {
2861 if (pfx
&& memcmp(pfx
, RTA_DATA(rta
[IFA_LOCAL
-1]), sizeof(*pfx
)))
2863 pfx
= RTA_DATA(rta
[IFA_LOCAL
-1]);
2868 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2871 /* Maximum length of ifa_cacheinfo attributes */
2872 #define INET6_IFADDR_RTA_SPACE \
2873 RTA_SPACE(16) /* IFA_ADDRESS */ + \
2874 RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */
2876 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
2877 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2879 struct ifaddrmsg
*ifm
;
2880 struct nlmsghdr
*nlh
;
2881 struct ifa_cacheinfo ci
;
2882 unsigned char *b
= skb
->tail
;
2884 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2885 ifm
= NLMSG_DATA(nlh
);
2886 ifm
->ifa_family
= AF_INET6
;
2887 ifm
->ifa_prefixlen
= ifa
->prefix_len
;
2888 ifm
->ifa_flags
= ifa
->flags
;
2889 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2890 if (ifa
->scope
&IFA_HOST
)
2891 ifm
->ifa_scope
= RT_SCOPE_HOST
;
2892 else if (ifa
->scope
&IFA_LINK
)
2893 ifm
->ifa_scope
= RT_SCOPE_LINK
;
2894 else if (ifa
->scope
&IFA_SITE
)
2895 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2896 ifm
->ifa_index
= ifa
->idev
->dev
->ifindex
;
2897 RTA_PUT(skb
, IFA_ADDRESS
, 16, &ifa
->addr
);
2898 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
2899 ci
.ifa_prefered
= ifa
->prefered_lft
;
2900 ci
.ifa_valid
= ifa
->valid_lft
;
2901 if (ci
.ifa_prefered
!= INFINITY_LIFE_TIME
) {
2902 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
2903 ci
.ifa_prefered
-= tval
;
2904 if (ci
.ifa_valid
!= INFINITY_LIFE_TIME
)
2905 ci
.ifa_valid
-= tval
;
2908 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2909 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2911 ci
.cstamp
= (__u32
)(TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) / HZ
* 100
2912 + TIME_DELTA(ifa
->cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2913 ci
.tstamp
= (__u32
)(TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
2914 + TIME_DELTA(ifa
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
2915 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2916 nlh
->nlmsg_len
= skb
->tail
- b
;
2921 skb_trim(skb
, b
- skb
->data
);
2925 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
2926 u32 pid
, u32 seq
, int event
, u16 flags
)
2928 struct ifaddrmsg
*ifm
;
2929 struct nlmsghdr
*nlh
;
2930 struct ifa_cacheinfo ci
;
2931 unsigned char *b
= skb
->tail
;
2933 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2934 ifm
= NLMSG_DATA(nlh
);
2935 ifm
->ifa_family
= AF_INET6
;
2936 ifm
->ifa_prefixlen
= 128;
2937 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2938 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2939 if (ipv6_addr_scope(&ifmca
->mca_addr
)&IFA_SITE
)
2940 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2941 ifm
->ifa_index
= ifmca
->idev
->dev
->ifindex
;
2942 RTA_PUT(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
);
2943 ci
.cstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) / HZ
2944 * 100 + TIME_DELTA(ifmca
->mca_cstamp
, INITIAL_JIFFIES
) % HZ
2946 ci
.tstamp
= (__u32
)(TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) / HZ
2947 * 100 + TIME_DELTA(ifmca
->mca_tstamp
, INITIAL_JIFFIES
) % HZ
2949 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2950 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2951 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2952 nlh
->nlmsg_len
= skb
->tail
- b
;
2957 skb_trim(skb
, b
- skb
->data
);
2961 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
2962 u32 pid
, u32 seq
, int event
, unsigned int flags
)
2964 struct ifaddrmsg
*ifm
;
2965 struct nlmsghdr
*nlh
;
2966 struct ifa_cacheinfo ci
;
2967 unsigned char *b
= skb
->tail
;
2969 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*ifm
), flags
);
2970 ifm
= NLMSG_DATA(nlh
);
2971 ifm
->ifa_family
= AF_INET6
;
2972 ifm
->ifa_prefixlen
= 128;
2973 ifm
->ifa_flags
= IFA_F_PERMANENT
;
2974 ifm
->ifa_scope
= RT_SCOPE_UNIVERSE
;
2975 if (ipv6_addr_scope(&ifaca
->aca_addr
)&IFA_SITE
)
2976 ifm
->ifa_scope
= RT_SCOPE_SITE
;
2977 ifm
->ifa_index
= ifaca
->aca_idev
->dev
->ifindex
;
2978 RTA_PUT(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
);
2979 ci
.cstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) / HZ
2980 * 100 + TIME_DELTA(ifaca
->aca_cstamp
, INITIAL_JIFFIES
) % HZ
2982 ci
.tstamp
= (__u32
)(TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) / HZ
2983 * 100 + TIME_DELTA(ifaca
->aca_tstamp
, INITIAL_JIFFIES
) % HZ
2985 ci
.ifa_prefered
= INFINITY_LIFE_TIME
;
2986 ci
.ifa_valid
= INFINITY_LIFE_TIME
;
2987 RTA_PUT(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
2988 nlh
->nlmsg_len
= skb
->tail
- b
;
2993 skb_trim(skb
, b
- skb
->data
);
3004 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3005 enum addr_type_t type
)
3008 int s_idx
, s_ip_idx
;
3010 struct net_device
*dev
;
3011 struct inet6_dev
*idev
= NULL
;
3012 struct inet6_ifaddr
*ifa
;
3013 struct ifmcaddr6
*ifmca
;
3014 struct ifacaddr6
*ifaca
;
3016 s_idx
= cb
->args
[0];
3017 s_ip_idx
= ip_idx
= cb
->args
[1];
3018 read_lock(&dev_base_lock
);
3020 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
3026 if ((idev
= in6_dev_get(dev
)) == NULL
)
3028 read_lock_bh(&idev
->lock
);
3031 /* unicast address incl. temp addr */
3032 for (ifa
= idev
->addr_list
; ifa
;
3033 ifa
= ifa
->if_next
, ip_idx
++) {
3034 if (ip_idx
< s_ip_idx
)
3036 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3037 NETLINK_CB(cb
->skb
).pid
,
3038 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3043 case MULTICAST_ADDR
:
3044 /* multicast address */
3045 for (ifmca
= idev
->mc_list
; ifmca
;
3046 ifmca
= ifmca
->next
, ip_idx
++) {
3047 if (ip_idx
< s_ip_idx
)
3049 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3050 NETLINK_CB(cb
->skb
).pid
,
3051 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3057 /* anycast address */
3058 for (ifaca
= idev
->ac_list
; ifaca
;
3059 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3060 if (ip_idx
< s_ip_idx
)
3062 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3063 NETLINK_CB(cb
->skb
).pid
,
3064 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3072 read_unlock_bh(&idev
->lock
);
3077 read_unlock_bh(&idev
->lock
);
3080 read_unlock(&dev_base_lock
);
3082 cb
->args
[1] = ip_idx
;
3086 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3088 enum addr_type_t type
= UNICAST_ADDR
;
3089 return inet6_dump_addr(skb
, cb
, type
);
3092 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3094 enum addr_type_t type
= MULTICAST_ADDR
;
3095 return inet6_dump_addr(skb
, cb
, type
);
3099 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3101 enum addr_type_t type
= ANYCAST_ADDR
;
3102 return inet6_dump_addr(skb
, cb
, type
);
3105 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3107 struct sk_buff
*skb
;
3108 int size
= NLMSG_SPACE(sizeof(struct ifaddrmsg
) + INET6_IFADDR_RTA_SPACE
);
3110 skb
= alloc_skb(size
, GFP_ATOMIC
);
3112 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, ENOBUFS
);
3115 if (inet6_fill_ifaddr(skb
, ifa
, current
->pid
, 0, event
, 0) < 0) {
3117 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFADDR
, EINVAL
);
3120 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFADDR
;
3121 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFADDR
, GFP_ATOMIC
);
3124 static void inline ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3125 __s32
*array
, int bytes
)
3127 memset(array
, 0, bytes
);
3128 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3129 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3130 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3131 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3132 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3133 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3134 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3135 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3136 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3137 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3138 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3139 #ifdef CONFIG_IPV6_PRIVACY
3140 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3141 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3142 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3143 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3144 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3146 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3147 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3148 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3149 #ifdef CONFIG_IPV6_ROUTER_PREF
3150 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3151 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3152 #ifdef CONFIV_IPV6_ROUTE_INFO
3153 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3158 /* Maximum length of ifinfomsg attributes */
3159 #define INET6_IFINFO_RTA_SPACE \
3160 RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \
3161 RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \
3162 RTA_SPACE(sizeof(u32)) /* MTU */ + \
3163 RTA_SPACE(sizeof(int)) /* LINK */ + \
3164 RTA_SPACE(0) /* PROTINFO */ + \
3165 RTA_SPACE(sizeof(u32)) /* FLAGS */ + \
3166 RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \
3167 RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */
3169 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3170 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3172 struct net_device
*dev
= idev
->dev
;
3173 __s32
*array
= NULL
;
3174 struct ifinfomsg
*r
;
3175 struct nlmsghdr
*nlh
;
3176 unsigned char *b
= skb
->tail
;
3177 struct rtattr
*subattr
;
3178 __u32 mtu
= dev
->mtu
;
3179 struct ifla_cacheinfo ci
;
3181 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*r
), flags
);
3182 r
= NLMSG_DATA(nlh
);
3183 r
->ifi_family
= AF_INET6
;
3185 r
->ifi_type
= dev
->type
;
3186 r
->ifi_index
= dev
->ifindex
;
3187 r
->ifi_flags
= dev_get_flags(dev
);
3190 RTA_PUT(skb
, IFLA_IFNAME
, strlen(dev
->name
)+1, dev
->name
);
3193 RTA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3195 RTA_PUT(skb
, IFLA_MTU
, sizeof(mtu
), &mtu
);
3196 if (dev
->ifindex
!= dev
->iflink
)
3197 RTA_PUT(skb
, IFLA_LINK
, sizeof(int), &dev
->iflink
);
3199 subattr
= (struct rtattr
*)skb
->tail
;
3201 RTA_PUT(skb
, IFLA_PROTINFO
, 0, NULL
);
3203 /* return the device flags */
3204 RTA_PUT(skb
, IFLA_INET6_FLAGS
, sizeof(__u32
), &idev
->if_flags
);
3206 /* return interface cacheinfo */
3207 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3208 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3209 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3210 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3211 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3212 RTA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3214 /* return the device sysctl params */
3215 if ((array
= kmalloc(DEVCONF_MAX
* sizeof(*array
), GFP_ATOMIC
)) == NULL
)
3216 goto rtattr_failure
;
3217 ipv6_store_devconf(&idev
->cnf
, array
, DEVCONF_MAX
* sizeof(*array
));
3218 RTA_PUT(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(*array
), array
);
3220 /* XXX - Statistics/MC not implemented */
3221 subattr
->rta_len
= skb
->tail
- (u8
*)subattr
;
3223 nlh
->nlmsg_len
= skb
->tail
- b
;
3230 skb_trim(skb
, b
- skb
->data
);
3234 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3237 int s_idx
= cb
->args
[0];
3238 struct net_device
*dev
;
3239 struct inet6_dev
*idev
;
3241 read_lock(&dev_base_lock
);
3242 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3245 if ((idev
= in6_dev_get(dev
)) == NULL
)
3247 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3248 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3253 read_unlock(&dev_base_lock
);
3259 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3261 struct sk_buff
*skb
;
3262 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
) + INET6_IFINFO_RTA_SPACE
);
3264 skb
= alloc_skb(size
, GFP_ATOMIC
);
3266 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, ENOBUFS
);
3269 if (inet6_fill_ifinfo(skb
, idev
, current
->pid
, 0, event
, 0) < 0) {
3271 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_IFINFO
, EINVAL
);
3274 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_IFINFO
;
3275 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_IFINFO
, GFP_ATOMIC
);
3278 /* Maximum length of prefix_cacheinfo attributes */
3279 #define INET6_PREFIX_RTA_SPACE \
3280 RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \
3281 RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */
3283 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3284 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3285 int event
, unsigned int flags
)
3287 struct prefixmsg
*pmsg
;
3288 struct nlmsghdr
*nlh
;
3289 unsigned char *b
= skb
->tail
;
3290 struct prefix_cacheinfo ci
;
3292 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3293 pmsg
= NLMSG_DATA(nlh
);
3294 pmsg
->prefix_family
= AF_INET6
;
3295 pmsg
->prefix_pad1
= 0;
3296 pmsg
->prefix_pad2
= 0;
3297 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3298 pmsg
->prefix_len
= pinfo
->prefix_len
;
3299 pmsg
->prefix_type
= pinfo
->type
;
3300 pmsg
->prefix_pad3
= 0;
3302 pmsg
->prefix_flags
= 0;
3304 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3305 if (pinfo
->autoconf
)
3306 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3308 RTA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3310 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3311 ci
.valid_time
= ntohl(pinfo
->valid
);
3312 RTA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3314 nlh
->nlmsg_len
= skb
->tail
- b
;
3319 skb_trim(skb
, b
- skb
->data
);
3323 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3324 struct prefix_info
*pinfo
)
3326 struct sk_buff
*skb
;
3327 int size
= NLMSG_SPACE(sizeof(struct prefixmsg
) + INET6_PREFIX_RTA_SPACE
);
3329 skb
= alloc_skb(size
, GFP_ATOMIC
);
3331 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, ENOBUFS
);
3334 if (inet6_fill_prefix(skb
, idev
, pinfo
, current
->pid
, 0, event
, 0) < 0) {
3336 netlink_set_err(rtnl
, 0, RTNLGRP_IPV6_PREFIX
, EINVAL
);
3339 NETLINK_CB(skb
).dst_group
= RTNLGRP_IPV6_PREFIX
;
3340 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_IPV6_PREFIX
, GFP_ATOMIC
);
3343 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3344 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3345 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3346 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3347 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= inet6_dump_ifaddr
, },
3348 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3349 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3350 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3351 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3352 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3353 .dumpit
= inet6_dump_fib
, },
3356 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3358 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3362 ip6_ins_rt(ifp
->rt
, NULL
, NULL
, NULL
);
3363 if (ifp
->idev
->cnf
.forwarding
)
3364 addrconf_join_anycast(ifp
);
3367 if (ifp
->idev
->cnf
.forwarding
)
3368 addrconf_leave_anycast(ifp
);
3369 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3370 dst_hold(&ifp
->rt
->u
.dst
);
3371 if (ip6_del_rt(ifp
->rt
, NULL
, NULL
, NULL
))
3372 dst_free(&ifp
->rt
->u
.dst
);
3377 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3379 read_lock_bh(&addrconf_lock
);
3380 if (likely(ifp
->idev
->dead
== 0))
3381 __ipv6_ifa_notify(event
, ifp
);
3382 read_unlock_bh(&addrconf_lock
);
3385 #ifdef CONFIG_SYSCTL
3388 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3389 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3391 int *valp
= ctl
->data
;
3395 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3397 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3398 if (valp
!= &ipv6_devconf
.forwarding
) {
3399 if ((!*valp
) ^ (!val
)) {
3400 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3403 dev_forward_change(idev
);
3406 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3407 addrconf_forward_change();
3410 rt6_purge_dflt_routers();
3416 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3417 int __user
*name
, int nlen
,
3418 void __user
*oldval
,
3419 size_t __user
*oldlenp
,
3420 void __user
*newval
, size_t newlen
,
3423 int *valp
= table
->data
;
3426 if (!newval
|| !newlen
)
3428 if (newlen
!= sizeof(int))
3430 if (get_user(new, (int __user
*)newval
))
3434 if (oldval
&& oldlenp
) {
3436 if (get_user(len
, oldlenp
))
3439 if (len
> table
->maxlen
)
3440 len
= table
->maxlen
;
3441 if (copy_to_user(oldval
, valp
, len
))
3443 if (put_user(len
, oldlenp
))
3448 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3449 if (valp
!= &ipv6_devconf
.forwarding
) {
3450 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3452 if (unlikely(idev
== NULL
))
3454 changed
= (!*valp
) ^ (!new);
3457 dev_forward_change(idev
);
3460 addrconf_forward_change();
3464 rt6_purge_dflt_routers();
3471 static struct addrconf_sysctl_table
3473 struct ctl_table_header
*sysctl_header
;
3474 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3475 ctl_table addrconf_dev
[2];
3476 ctl_table addrconf_conf_dir
[2];
3477 ctl_table addrconf_proto_dir
[2];
3478 ctl_table addrconf_root_dir
[2];
3479 } addrconf_sysctl
= {
3480 .sysctl_header
= NULL
,
3483 .ctl_name
= NET_IPV6_FORWARDING
,
3484 .procname
= "forwarding",
3485 .data
= &ipv6_devconf
.forwarding
,
3486 .maxlen
= sizeof(int),
3488 .proc_handler
= &addrconf_sysctl_forward
,
3489 .strategy
= &addrconf_sysctl_forward_strategy
,
3492 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3493 .procname
= "hop_limit",
3494 .data
= &ipv6_devconf
.hop_limit
,
3495 .maxlen
= sizeof(int),
3497 .proc_handler
= proc_dointvec
,
3500 .ctl_name
= NET_IPV6_MTU
,
3502 .data
= &ipv6_devconf
.mtu6
,
3503 .maxlen
= sizeof(int),
3505 .proc_handler
= &proc_dointvec
,
3508 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3509 .procname
= "accept_ra",
3510 .data
= &ipv6_devconf
.accept_ra
,
3511 .maxlen
= sizeof(int),
3513 .proc_handler
= &proc_dointvec
,
3516 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3517 .procname
= "accept_redirects",
3518 .data
= &ipv6_devconf
.accept_redirects
,
3519 .maxlen
= sizeof(int),
3521 .proc_handler
= &proc_dointvec
,
3524 .ctl_name
= NET_IPV6_AUTOCONF
,
3525 .procname
= "autoconf",
3526 .data
= &ipv6_devconf
.autoconf
,
3527 .maxlen
= sizeof(int),
3529 .proc_handler
= &proc_dointvec
,
3532 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3533 .procname
= "dad_transmits",
3534 .data
= &ipv6_devconf
.dad_transmits
,
3535 .maxlen
= sizeof(int),
3537 .proc_handler
= &proc_dointvec
,
3540 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3541 .procname
= "router_solicitations",
3542 .data
= &ipv6_devconf
.rtr_solicits
,
3543 .maxlen
= sizeof(int),
3545 .proc_handler
= &proc_dointvec
,
3548 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3549 .procname
= "router_solicitation_interval",
3550 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3551 .maxlen
= sizeof(int),
3553 .proc_handler
= &proc_dointvec_jiffies
,
3554 .strategy
= &sysctl_jiffies
,
3557 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3558 .procname
= "router_solicitation_delay",
3559 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3560 .maxlen
= sizeof(int),
3562 .proc_handler
= &proc_dointvec_jiffies
,
3563 .strategy
= &sysctl_jiffies
,
3566 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3567 .procname
= "force_mld_version",
3568 .data
= &ipv6_devconf
.force_mld_version
,
3569 .maxlen
= sizeof(int),
3571 .proc_handler
= &proc_dointvec
,
3573 #ifdef CONFIG_IPV6_PRIVACY
3575 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3576 .procname
= "use_tempaddr",
3577 .data
= &ipv6_devconf
.use_tempaddr
,
3578 .maxlen
= sizeof(int),
3580 .proc_handler
= &proc_dointvec
,
3583 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3584 .procname
= "temp_valid_lft",
3585 .data
= &ipv6_devconf
.temp_valid_lft
,
3586 .maxlen
= sizeof(int),
3588 .proc_handler
= &proc_dointvec
,
3591 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3592 .procname
= "temp_prefered_lft",
3593 .data
= &ipv6_devconf
.temp_prefered_lft
,
3594 .maxlen
= sizeof(int),
3596 .proc_handler
= &proc_dointvec
,
3599 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3600 .procname
= "regen_max_retry",
3601 .data
= &ipv6_devconf
.regen_max_retry
,
3602 .maxlen
= sizeof(int),
3604 .proc_handler
= &proc_dointvec
,
3607 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3608 .procname
= "max_desync_factor",
3609 .data
= &ipv6_devconf
.max_desync_factor
,
3610 .maxlen
= sizeof(int),
3612 .proc_handler
= &proc_dointvec
,
3616 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3617 .procname
= "max_addresses",
3618 .data
= &ipv6_devconf
.max_addresses
,
3619 .maxlen
= sizeof(int),
3621 .proc_handler
= &proc_dointvec
,
3624 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3625 .procname
= "accept_ra_defrtr",
3626 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3627 .maxlen
= sizeof(int),
3629 .proc_handler
= &proc_dointvec
,
3632 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3633 .procname
= "accept_ra_pinfo",
3634 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3635 .maxlen
= sizeof(int),
3637 .proc_handler
= &proc_dointvec
,
3639 #ifdef CONFIG_IPV6_ROUTER_PREF
3641 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3642 .procname
= "accept_ra_rtr_pref",
3643 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3644 .maxlen
= sizeof(int),
3646 .proc_handler
= &proc_dointvec
,
3649 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
3650 .procname
= "router_probe_interval",
3651 .data
= &ipv6_devconf
.rtr_probe_interval
,
3652 .maxlen
= sizeof(int),
3654 .proc_handler
= &proc_dointvec_jiffies
,
3655 .strategy
= &sysctl_jiffies
,
3657 #ifdef CONFIV_IPV6_ROUTE_INFO
3659 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
3660 .procname
= "accept_ra_rt_info_max_plen",
3661 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
3662 .maxlen
= sizeof(int),
3664 .proc_handler
= &proc_dointvec
,
3669 .ctl_name
= 0, /* sentinel */
3674 .ctl_name
= NET_PROTO_CONF_ALL
,
3677 .child
= addrconf_sysctl
.addrconf_vars
,
3680 .ctl_name
= 0, /* sentinel */
3683 .addrconf_conf_dir
= {
3685 .ctl_name
= NET_IPV6_CONF
,
3688 .child
= addrconf_sysctl
.addrconf_dev
,
3691 .ctl_name
= 0, /* sentinel */
3694 .addrconf_proto_dir
= {
3696 .ctl_name
= NET_IPV6
,
3699 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3702 .ctl_name
= 0, /* sentinel */
3705 .addrconf_root_dir
= {
3707 .ctl_name
= CTL_NET
,
3710 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3713 .ctl_name
= 0, /* sentinel */
3718 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3721 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3722 struct addrconf_sysctl_table
*t
;
3723 char *dev_name
= NULL
;
3725 t
= kmalloc(sizeof(*t
), GFP_KERNEL
);
3728 memcpy(t
, &addrconf_sysctl
, sizeof(*t
));
3729 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3730 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3731 t
->addrconf_vars
[i
].de
= NULL
;
3732 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3735 dev_name
= dev
->name
;
3736 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3738 dev_name
= "default";
3739 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3743 * Make a copy of dev_name, because '.procname' is regarded as const
3744 * by sysctl and we wouldn't want anyone to change it under our feet
3745 * (see SIOCSIFNAME).
3747 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3751 t
->addrconf_dev
[0].procname
= dev_name
;
3753 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3754 t
->addrconf_dev
[0].de
= NULL
;
3755 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3756 t
->addrconf_conf_dir
[0].de
= NULL
;
3757 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3758 t
->addrconf_proto_dir
[0].de
= NULL
;
3759 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3760 t
->addrconf_root_dir
[0].de
= NULL
;
3762 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
, 0);
3763 if (t
->sysctl_header
== NULL
)
3778 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
3781 struct addrconf_sysctl_table
*t
= p
->sysctl
;
3783 unregister_sysctl_table(t
->sysctl_header
);
3784 kfree(t
->addrconf_dev
[0].procname
);
3796 int register_inet6addr_notifier(struct notifier_block
*nb
)
3798 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
3801 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
3803 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
3807 * Init / cleanup code
3810 int __init
addrconf_init(void)
3814 /* The addrconf netdev notifier requires that loopback_dev
3815 * has it's ipv6 private information allocated and setup
3816 * before it can bring up and give link-local addresses
3817 * to other devices which are up.
3819 * Unfortunately, loopback_dev is not necessarily the first
3820 * entry in the global dev_base list of net devices. In fact,
3821 * it is likely to be the very last entry on that list.
3822 * So this causes the notifier registry below to try and
3823 * give link-local addresses to all devices besides loopback_dev
3824 * first, then loopback_dev, which cases all the non-loopback_dev
3825 * devices to fail to get a link-local address.
3827 * So, as a temporary fix, allocate the ipv6 structure for
3828 * loopback_dev first by hand.
3829 * Longer term, all of the dependencies ipv6 has upon the loopback
3830 * device and it being up should be removed.
3833 if (!ipv6_add_dev(&loopback_dev
))
3839 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
3841 register_netdevice_notifier(&ipv6_dev_notf
);
3844 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
3845 #ifdef CONFIG_SYSCTL
3846 addrconf_sysctl
.sysctl_header
=
3847 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
, 0);
3848 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
3854 void __exit
addrconf_cleanup(void)
3856 struct net_device
*dev
;
3857 struct inet6_dev
*idev
;
3858 struct inet6_ifaddr
*ifa
;
3861 unregister_netdevice_notifier(&ipv6_dev_notf
);
3863 rtnetlink_links
[PF_INET6
] = NULL
;
3864 #ifdef CONFIG_SYSCTL
3865 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
3866 addrconf_sysctl_unregister(&ipv6_devconf
);
3875 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
3876 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3878 addrconf_ifdown(dev
, 1);
3880 addrconf_ifdown(&loopback_dev
, 2);
3886 write_lock_bh(&addrconf_hash_lock
);
3887 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3888 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
3889 struct inet6_ifaddr
*bifa
;
3892 ifa
= ifa
->lst_next
;
3893 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
3894 /* Do not free it; something is wrong.
3895 Now we can investigate it with debugger.
3899 write_unlock_bh(&addrconf_hash_lock
);
3901 del_timer(&addr_chk_timer
);
3905 #ifdef CONFIG_PROC_FS
3906 proc_net_remove("if_inet6");