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/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.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>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <net/pkt_sched.h>
78 #include <linux/if_tunnel.h>
79 #include <linux/rtnetlink.h>
81 #ifdef CONFIG_IPV6_PRIVACY
82 #include <linux/random.h>
85 #include <asm/uaccess.h>
86 #include <asm/unaligned.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
91 /* Set to 3 to get tracing... */
95 #define ADBG(x) printk x
100 #define INFINITY_LIFE_TIME 0xFFFFFFFF
101 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
104 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
105 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
108 #ifdef CONFIG_IPV6_PRIVACY
109 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
110 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
111 static void ipv6_regen_rndid(unsigned long data
);
113 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
116 static int ipv6_count_addresses(struct inet6_dev
*idev
);
119 * Configured unicast address hash table
121 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
122 static DEFINE_RWLOCK(addrconf_hash_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 ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
148 struct ipv6_devconf ipv6_devconf __read_mostly
= {
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
,
168 .accept_ra_defrtr
= 1,
169 .accept_ra_pinfo
= 1,
170 #ifdef CONFIG_IPV6_ROUTER_PREF
171 .accept_ra_rtr_pref
= 1,
172 .rtr_probe_interval
= 60 * HZ
,
173 #ifdef CONFIG_IPV6_ROUTE_INFO
174 .accept_ra_rt_info_max_plen
= 0,
178 .accept_source_route
= 0, /* we do not accept RH0 by default. */
181 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
183 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
184 .mtu6
= IPV6_MIN_MTU
,
186 .accept_redirects
= 1,
189 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
190 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
191 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
192 #ifdef CONFIG_IPV6_PRIVACY
194 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
195 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
196 .regen_max_retry
= REGEN_MAX_RETRY
,
197 .max_desync_factor
= MAX_DESYNC_FACTOR
,
199 .max_addresses
= IPV6_MAX_ADDRESSES
,
200 .accept_ra_defrtr
= 1,
201 .accept_ra_pinfo
= 1,
202 #ifdef CONFIG_IPV6_ROUTER_PREF
203 .accept_ra_rtr_pref
= 1,
204 .rtr_probe_interval
= 60 * HZ
,
205 #ifdef CONFIG_IPV6_ROUTE_INFO
206 .accept_ra_rt_info_max_plen
= 0,
210 .accept_source_route
= 0, /* we do not accept RH0 by default. */
213 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
214 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
215 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
217 /* Check if a valid qdisc is available */
218 static inline int addrconf_qdisc_ok(struct net_device
*dev
)
220 return (dev
->qdisc
!= &noop_qdisc
);
223 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
225 if (del_timer(&ifp
->timer
))
229 enum addrconf_timer_t
236 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
237 enum addrconf_timer_t what
,
240 if (!del_timer(&ifp
->timer
))
245 ifp
->timer
.function
= addrconf_dad_timer
;
248 ifp
->timer
.function
= addrconf_rs_timer
;
252 ifp
->timer
.expires
= jiffies
+ when
;
253 add_timer(&ifp
->timer
);
256 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
258 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
259 sizeof(struct ipstats_mib
),
260 __alignof__(struct ipstats_mib
)) < 0)
262 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
263 sizeof(struct icmpv6_mib
),
264 __alignof__(struct icmpv6_mib
)) < 0)
266 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
267 sizeof(struct icmpv6msg_mib
),
268 __alignof__(struct icmpv6msg_mib
)) < 0)
274 snmp_mib_free((void **)idev
->stats
.icmpv6
);
276 snmp_mib_free((void **)idev
->stats
.ipv6
);
281 static void snmp6_free_dev(struct inet6_dev
*idev
)
283 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
284 snmp_mib_free((void **)idev
->stats
.icmpv6
);
285 snmp_mib_free((void **)idev
->stats
.ipv6
);
288 /* Nobody refers to this device, we may destroy it. */
290 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
292 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
296 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
298 struct net_device
*dev
= idev
->dev
;
299 BUG_TRAP(idev
->addr_list
==NULL
);
300 BUG_TRAP(idev
->mc_list
==NULL
);
301 #ifdef NET_REFCNT_DEBUG
302 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
306 printk("Freeing alive inet6 device %p\n", idev
);
309 snmp6_free_dev(idev
);
310 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
313 EXPORT_SYMBOL(in6_dev_finish_destroy
);
315 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
317 struct inet6_dev
*ndev
;
318 struct in6_addr maddr
;
322 if (dev
->mtu
< IPV6_MIN_MTU
)
325 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
330 rwlock_init(&ndev
->lock
);
332 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
333 ndev
->cnf
.mtu6
= dev
->mtu
;
334 ndev
->cnf
.sysctl
= NULL
;
335 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
336 if (ndev
->nd_parms
== NULL
) {
340 /* We refer to the device */
343 if (snmp6_alloc_dev(ndev
) < 0) {
345 "%s(): cannot allocate memory for statistics; dev=%s.\n",
346 __FUNCTION__
, dev
->name
));
347 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
349 in6_dev_finish_destroy(ndev
);
353 if (snmp6_register_dev(ndev
) < 0) {
355 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
356 __FUNCTION__
, dev
->name
));
357 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
359 in6_dev_finish_destroy(ndev
);
363 /* One reference from device. We must do this before
364 * we invoke __ipv6_regen_rndid().
368 #ifdef CONFIG_IPV6_PRIVACY
369 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
370 if ((dev
->flags
&IFF_LOOPBACK
) ||
371 dev
->type
== ARPHRD_TUNNEL
||
372 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
373 dev
->type
== ARPHRD_SIT
||
375 dev
->type
== ARPHRD_NONE
) {
377 "%s: Disabled Privacy Extensions\n",
379 ndev
->cnf
.use_tempaddr
= -1;
382 ipv6_regen_rndid((unsigned long) ndev
);
386 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
387 ndev
->if_flags
|= IF_READY
;
389 ipv6_mc_init_dev(ndev
);
390 ndev
->tstamp
= jiffies
;
392 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
393 NET_IPV6_NEIGH
, "ipv6",
394 &ndisc_ifinfo_sysctl_change
,
396 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
398 /* protected by rtnl_lock */
399 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
401 /* Join all-node multicast group */
402 ipv6_addr_all_nodes(&maddr
);
403 ipv6_dev_mc_inc(dev
, &maddr
);
408 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
410 struct inet6_dev
*idev
;
414 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
415 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
419 if (dev
->flags
&IFF_UP
)
425 static void dev_forward_change(struct inet6_dev
*idev
)
427 struct net_device
*dev
;
428 struct inet6_ifaddr
*ifa
;
429 struct in6_addr addr
;
434 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
435 ipv6_addr_all_routers(&addr
);
437 if (idev
->cnf
.forwarding
)
438 ipv6_dev_mc_inc(dev
, &addr
);
440 ipv6_dev_mc_dec(dev
, &addr
);
442 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
443 if (ifa
->flags
&IFA_F_TENTATIVE
)
445 if (idev
->cnf
.forwarding
)
446 addrconf_join_anycast(ifa
);
448 addrconf_leave_anycast(ifa
);
453 static void addrconf_forward_change(void)
455 struct net_device
*dev
;
456 struct inet6_dev
*idev
;
458 read_lock(&dev_base_lock
);
459 for_each_netdev(&init_net
, dev
) {
461 idev
= __in6_dev_get(dev
);
463 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
464 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
466 dev_forward_change(idev
);
470 read_unlock(&dev_base_lock
);
474 /* Nobody refers to this ifaddr, destroy it */
476 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
478 BUG_TRAP(ifp
->if_next
==NULL
);
479 BUG_TRAP(ifp
->lst_next
==NULL
);
480 #ifdef NET_REFCNT_DEBUG
481 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
484 in6_dev_put(ifp
->idev
);
486 if (del_timer(&ifp
->timer
))
487 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
490 printk("Freeing alive inet6 address %p\n", ifp
);
493 dst_release(&ifp
->rt
->u
.dst
);
499 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
501 struct inet6_ifaddr
*ifa
, **ifap
;
502 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
505 * Each device address list is sorted in order of scope -
506 * global before linklocal.
508 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
509 ifap
= &ifa
->if_next
) {
510 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
514 ifp
->if_next
= *ifap
;
518 /* On success it returns ifp with increased reference count */
520 static struct inet6_ifaddr
*
521 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
522 int scope
, u32 flags
)
524 struct inet6_ifaddr
*ifa
= NULL
;
531 err
= -ENODEV
; /*XXX*/
535 write_lock(&addrconf_hash_lock
);
537 /* Ignore adding duplicate addresses on an interface */
538 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
539 ADBG(("ipv6_add_addr: already assigned\n"));
544 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
547 ADBG(("ipv6_add_addr: malloc failed\n"));
552 rt
= addrconf_dst_alloc(idev
, addr
, 0);
558 ipv6_addr_copy(&ifa
->addr
, addr
);
560 spin_lock_init(&ifa
->lock
);
561 init_timer(&ifa
->timer
);
562 ifa
->timer
.data
= (unsigned long) ifa
;
564 ifa
->prefix_len
= pfxlen
;
565 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
566 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
571 * part one of RFC 4429, section 3.3
572 * We should not configure an address as
573 * optimistic if we do not yet know the link
574 * layer address of our nexhop router
577 if (rt
->rt6i_nexthop
== NULL
)
578 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
585 /* Add to big hash table */
586 hash
= ipv6_addr_hash(addr
);
588 ifa
->lst_next
= inet6_addr_lst
[hash
];
589 inet6_addr_lst
[hash
] = ifa
;
591 write_unlock(&addrconf_hash_lock
);
593 write_lock(&idev
->lock
);
594 /* Add to inet6_dev unicast addr list. */
595 ipv6_link_dev_addr(idev
, ifa
);
597 #ifdef CONFIG_IPV6_PRIVACY
598 if (ifa
->flags
&IFA_F_TEMPORARY
) {
599 ifa
->tmp_next
= idev
->tempaddr_list
;
600 idev
->tempaddr_list
= ifa
;
606 write_unlock(&idev
->lock
);
608 rcu_read_unlock_bh();
610 if (likely(err
== 0))
611 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
619 write_unlock(&addrconf_hash_lock
);
623 /* This function wants to get referenced ifp and releases it before return */
625 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
627 struct inet6_ifaddr
*ifa
, **ifap
;
628 struct inet6_dev
*idev
= ifp
->idev
;
630 int deleted
= 0, onlink
= 0;
631 unsigned long expires
= jiffies
;
633 hash
= ipv6_addr_hash(&ifp
->addr
);
637 write_lock_bh(&addrconf_hash_lock
);
638 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
639 ifap
= &ifa
->lst_next
) {
641 *ifap
= ifa
->lst_next
;
643 ifa
->lst_next
= NULL
;
647 write_unlock_bh(&addrconf_hash_lock
);
649 write_lock_bh(&idev
->lock
);
650 #ifdef CONFIG_IPV6_PRIVACY
651 if (ifp
->flags
&IFA_F_TEMPORARY
) {
652 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
653 ifap
= &ifa
->tmp_next
) {
655 *ifap
= ifa
->tmp_next
;
657 in6_ifa_put(ifp
->ifpub
);
661 ifa
->tmp_next
= NULL
;
668 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
670 *ifap
= ifa
->if_next
;
673 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
677 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
678 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
680 if (ifa
->flags
& IFA_F_PERMANENT
) {
685 unsigned long lifetime
;
690 spin_lock(&ifa
->lock
);
691 lifetime
= min_t(unsigned long,
692 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
693 if (time_before(expires
,
694 ifa
->tstamp
+ lifetime
* HZ
))
695 expires
= ifa
->tstamp
+ lifetime
* HZ
;
696 spin_unlock(&ifa
->lock
);
700 ifap
= &ifa
->if_next
;
702 write_unlock_bh(&idev
->lock
);
704 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
706 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
708 addrconf_del_timer(ifp
);
711 * Purge or update corresponding prefix
713 * 1) we don't purge prefix here if address was not permanent.
714 * prefix is managed by its own lifetime.
715 * 2) if there're no addresses, delete prefix.
716 * 3) if there're still other permanent address(es),
717 * corresponding prefix is still permanent.
718 * 4) otherwise, update prefix lifetime to the
719 * longest valid lifetime among the corresponding
720 * addresses on the device.
721 * Note: subsequent RA will update lifetime.
725 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
726 struct in6_addr prefix
;
729 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
730 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
732 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
736 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
737 rt
->rt6i_expires
= expires
;
738 rt
->rt6i_flags
|= RTF_EXPIRES
;
741 dst_release(&rt
->u
.dst
);
747 #ifdef CONFIG_IPV6_PRIVACY
748 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
750 struct inet6_dev
*idev
= ifp
->idev
;
751 struct in6_addr addr
, *tmpaddr
;
752 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
758 write_lock(&idev
->lock
);
760 spin_lock_bh(&ift
->lock
);
761 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
762 spin_unlock_bh(&ift
->lock
);
769 if (idev
->cnf
.use_tempaddr
<= 0) {
770 write_unlock(&idev
->lock
);
772 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
777 spin_lock_bh(&ifp
->lock
);
778 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
779 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
780 spin_unlock_bh(&ifp
->lock
);
781 write_unlock(&idev
->lock
);
783 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
789 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
790 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
791 spin_unlock_bh(&ifp
->lock
);
792 write_unlock(&idev
->lock
);
794 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
800 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
801 tmp_valid_lft
= min_t(__u32
,
803 idev
->cnf
.temp_valid_lft
);
804 tmp_prefered_lft
= min_t(__u32
,
806 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
807 tmp_plen
= ifp
->prefix_len
;
808 max_addresses
= idev
->cnf
.max_addresses
;
809 tmp_cstamp
= ifp
->cstamp
;
810 tmp_tstamp
= ifp
->tstamp
;
811 spin_unlock_bh(&ifp
->lock
);
813 write_unlock(&idev
->lock
);
815 addr_flags
= IFA_F_TEMPORARY
;
816 /* set in addrconf_prefix_rcv() */
817 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
818 addr_flags
|= IFA_F_OPTIMISTIC
;
820 ift
= !max_addresses
||
821 ipv6_count_addresses(idev
) < max_addresses
?
822 ipv6_add_addr(idev
, &addr
, tmp_plen
,
823 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
825 if (!ift
|| IS_ERR(ift
)) {
829 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
831 write_lock(&idev
->lock
);
835 spin_lock_bh(&ift
->lock
);
837 ift
->valid_lft
= tmp_valid_lft
;
838 ift
->prefered_lft
= tmp_prefered_lft
;
839 ift
->cstamp
= tmp_cstamp
;
840 ift
->tstamp
= tmp_tstamp
;
841 spin_unlock_bh(&ift
->lock
);
843 addrconf_dad_start(ift
, 0);
852 * Choose an appropriate source address (RFC3484)
854 struct ipv6_saddr_score
{
862 #define IPV6_SADDR_SCORE_LOCAL 0x0001
863 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
864 #define IPV6_SADDR_SCORE_HOA 0x0008
865 #define IPV6_SADDR_SCORE_OIF 0x0010
866 #define IPV6_SADDR_SCORE_LABEL 0x0020
867 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
869 static inline int ipv6_saddr_preferred(int type
)
871 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
872 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
877 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
878 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
880 struct ipv6_saddr_score hiscore
;
881 struct inet6_ifaddr
*ifa_result
= NULL
;
882 int daddr_type
= __ipv6_addr_type(daddr
);
883 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
884 int daddr_ifindex
= daddr_dev
? daddr_dev
->ifindex
: 0;
885 u32 daddr_label
= ipv6_addr_label(daddr
, daddr_type
, daddr_ifindex
);
886 struct net_device
*dev
;
888 memset(&hiscore
, 0, sizeof(hiscore
));
890 read_lock(&dev_base_lock
);
893 for_each_netdev(&init_net
, dev
) {
894 struct inet6_dev
*idev
;
895 struct inet6_ifaddr
*ifa
;
897 /* Rule 0: Candidate Source Address (section 4)
898 * - multicast and link-local destination address,
899 * the set of candidate source address MUST only
900 * include addresses assigned to interfaces
901 * belonging to the same link as the outgoing
903 * (- For site-local destination addresses, the
904 * set of candidate source addresses MUST only
905 * include addresses assigned to interfaces
906 * belonging to the same site as the outgoing
909 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
910 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
911 daddr_dev
&& dev
!= daddr_dev
)
914 idev
= __in6_dev_get(dev
);
918 read_lock_bh(&idev
->lock
);
919 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
920 struct ipv6_saddr_score score
;
922 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
925 * - Tentative Address (RFC2462 section 5.4)
926 * - A tentative address is not considered
927 * "assigned to an interface" in the traditional
928 * sense, unless it is also flagged as optimistic.
929 * - Candidate Source Address (section 4)
930 * - In any case, anycast addresses, multicast
931 * addresses, and the unspecified address MUST
932 * NOT be included in a candidate set.
934 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
935 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
937 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
938 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
939 LIMIT_NETDEBUG(KERN_DEBUG
940 "ADDRCONF: unspecified / multicast address "
941 "assigned as unicast address on %s",
951 if (ifa_result
== NULL
) {
952 /* record it if the first available entry */
956 /* Rule 1: Prefer same address */
957 if (hiscore
.rule
< 1) {
958 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
959 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
962 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
963 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
964 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
969 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
973 /* Rule 2: Prefer appropriate scope */
974 if (hiscore
.rule
< 2) {
975 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
978 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
979 if (hiscore
.scope
< score
.scope
) {
980 if (hiscore
.scope
< daddr_scope
) {
985 } else if (score
.scope
< hiscore
.scope
) {
986 if (score
.scope
< daddr_scope
)
987 break; /* addresses sorted by scope */
994 /* Rule 3: Avoid deprecated and optimistic addresses */
995 if (hiscore
.rule
< 3) {
996 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
997 (((ifa_result
->flags
&
998 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
999 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1002 if (ipv6_saddr_preferred(score
.addr_type
) ||
1004 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1005 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1006 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1011 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1015 /* Rule 4: Prefer home address */
1016 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1017 if (hiscore
.rule
< 4) {
1018 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1019 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1022 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1023 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1024 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1029 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1033 if (hiscore
.rule
< 4)
1037 /* Rule 5: Prefer outgoing interface */
1038 if (hiscore
.rule
< 5) {
1039 if (daddr_dev
== NULL
||
1040 daddr_dev
== ifa_result
->idev
->dev
)
1041 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1044 if (daddr_dev
== NULL
||
1045 daddr_dev
== ifa
->idev
->dev
) {
1046 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1047 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1052 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1056 /* Rule 6: Prefer matching label */
1057 if (hiscore
.rule
< 6) {
1058 if (ipv6_addr_label(&ifa_result
->addr
,
1060 ifa_result
->idev
->dev
->ifindex
) == daddr_label
)
1061 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1064 if (ipv6_addr_label(&ifa
->addr
,
1066 ifa
->idev
->dev
->ifindex
) == daddr_label
) {
1067 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1068 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1073 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1077 #ifdef CONFIG_IPV6_PRIVACY
1078 /* Rule 7: Prefer public address
1079 * Note: prefer temprary address if use_tempaddr >= 2
1081 if (hiscore
.rule
< 7) {
1082 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1083 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1084 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1087 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1088 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1089 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1090 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1095 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1099 if (hiscore
.rule
< 7)
1102 /* Rule 8: Use longest matching prefix */
1103 if (hiscore
.rule
< 8) {
1104 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1107 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1108 if (score
.matchlen
> hiscore
.matchlen
) {
1113 else if (score
.matchlen
< hiscore
.matchlen
)
1117 /* Final Rule: choose first available one */
1121 in6_ifa_put(ifa_result
);
1126 read_unlock_bh(&idev
->lock
);
1129 read_unlock(&dev_base_lock
);
1132 return -EADDRNOTAVAIL
;
1134 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1135 in6_ifa_put(ifa_result
);
1140 int ipv6_get_saddr(struct dst_entry
*dst
,
1141 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1143 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1146 EXPORT_SYMBOL(ipv6_get_saddr
);
1148 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1149 unsigned char banned_flags
)
1151 struct inet6_dev
*idev
;
1152 int err
= -EADDRNOTAVAIL
;
1155 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1156 struct inet6_ifaddr
*ifp
;
1158 read_lock_bh(&idev
->lock
);
1159 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1160 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1161 ipv6_addr_copy(addr
, &ifp
->addr
);
1166 read_unlock_bh(&idev
->lock
);
1172 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1175 struct inet6_ifaddr
*ifp
;
1177 read_lock_bh(&idev
->lock
);
1178 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1180 read_unlock_bh(&idev
->lock
);
1184 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1186 struct inet6_ifaddr
* ifp
;
1187 u8 hash
= ipv6_addr_hash(addr
);
1189 read_lock_bh(&addrconf_hash_lock
);
1190 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1191 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1192 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1193 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1194 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1198 read_unlock_bh(&addrconf_hash_lock
);
1202 EXPORT_SYMBOL(ipv6_chk_addr
);
1205 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1207 struct inet6_ifaddr
* ifp
;
1208 u8 hash
= ipv6_addr_hash(addr
);
1210 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1211 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1212 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1219 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1221 struct inet6_ifaddr
* ifp
;
1222 u8 hash
= ipv6_addr_hash(addr
);
1224 read_lock_bh(&addrconf_hash_lock
);
1225 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1226 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1227 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1228 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1234 read_unlock_bh(&addrconf_hash_lock
);
1239 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1241 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1242 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1243 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1244 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1245 int sk_ipv6only
= ipv6_only_sock(sk
);
1246 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1247 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1248 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1250 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1253 if (addr_type2
== IPV6_ADDR_ANY
&&
1254 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1257 if (addr_type
== IPV6_ADDR_ANY
&&
1258 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1261 if (sk2_rcv_saddr6
&&
1262 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1265 if (addr_type
== IPV6_ADDR_MAPPED
&&
1267 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1273 /* Gets referenced address, destroys ifaddr */
1275 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1277 if (ifp
->flags
&IFA_F_PERMANENT
) {
1278 spin_lock_bh(&ifp
->lock
);
1279 addrconf_del_timer(ifp
);
1280 ifp
->flags
|= IFA_F_TENTATIVE
;
1281 spin_unlock_bh(&ifp
->lock
);
1283 #ifdef CONFIG_IPV6_PRIVACY
1284 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1285 struct inet6_ifaddr
*ifpub
;
1286 spin_lock_bh(&ifp
->lock
);
1289 in6_ifa_hold(ifpub
);
1290 spin_unlock_bh(&ifp
->lock
);
1291 ipv6_create_tempaddr(ifpub
, ifp
);
1294 spin_unlock_bh(&ifp
->lock
);
1302 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1304 if (net_ratelimit())
1305 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1306 addrconf_dad_stop(ifp
);
1309 /* Join to solicited addr multicast group. */
1311 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1313 struct in6_addr maddr
;
1315 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1318 addrconf_addr_solict_mult(addr
, &maddr
);
1319 ipv6_dev_mc_inc(dev
, &maddr
);
1322 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1324 struct in6_addr maddr
;
1326 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1329 addrconf_addr_solict_mult(addr
, &maddr
);
1330 __ipv6_dev_mc_dec(idev
, &maddr
);
1333 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1335 struct in6_addr addr
;
1336 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1337 if (ipv6_addr_any(&addr
))
1339 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1342 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1344 struct in6_addr addr
;
1345 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1346 if (ipv6_addr_any(&addr
))
1348 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1351 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1353 if (dev
->addr_len
!= ETH_ALEN
)
1355 memcpy(eui
, dev
->dev_addr
, 3);
1356 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1359 * The zSeries OSA network cards can be shared among various
1360 * OS instances, but the OSA cards have only one MAC address.
1361 * This leads to duplicate address conflicts in conjunction
1362 * with IPv6 if more than one instance uses the same card.
1364 * The driver for these cards can deliver a unique 16-bit
1365 * identifier for each instance sharing the same card. It is
1366 * placed instead of 0xFFFE in the interface identifier. The
1367 * "u" bit of the interface identifier is not inverted in this
1368 * case. Hence the resulting interface identifier has local
1369 * scope according to RFC2373.
1372 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1373 eui
[4] = dev
->dev_id
& 0xFF;
1382 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1384 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1385 if (dev
->addr_len
!= ARCNET_ALEN
)
1388 eui
[7] = *(u8
*)dev
->dev_addr
;
1392 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1394 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1396 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1401 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1403 switch (dev
->type
) {
1406 case ARPHRD_IEEE802_TR
:
1407 return addrconf_ifid_eui48(eui
, dev
);
1409 return addrconf_ifid_arcnet(eui
, dev
);
1410 case ARPHRD_INFINIBAND
:
1411 return addrconf_ifid_infiniband(eui
, dev
);
1416 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1419 struct inet6_ifaddr
*ifp
;
1421 read_lock_bh(&idev
->lock
);
1422 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1423 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1424 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1429 read_unlock_bh(&idev
->lock
);
1433 #ifdef CONFIG_IPV6_PRIVACY
1434 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1435 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1438 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1439 idev
->rndid
[0] &= ~0x02;
1442 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1443 * check if generated address is not inappropriate
1445 * - Reserved subnet anycast (RFC 2526)
1446 * 11111101 11....11 1xxxxxxx
1447 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1448 * 00-00-5E-FE-xx-xx-xx-xx
1450 * - XXX: already assigned to an address on the device
1452 if (idev
->rndid
[0] == 0xfd &&
1453 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1454 (idev
->rndid
[7]&0x80))
1456 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1457 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1459 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1466 static void ipv6_regen_rndid(unsigned long data
)
1468 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1469 unsigned long expires
;
1472 write_lock_bh(&idev
->lock
);
1477 if (__ipv6_regen_rndid(idev
) < 0)
1481 idev
->cnf
.temp_prefered_lft
* HZ
-
1482 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1483 if (time_before(expires
, jiffies
)) {
1485 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1490 if (!mod_timer(&idev
->regen_timer
, expires
))
1494 write_unlock_bh(&idev
->lock
);
1495 rcu_read_unlock_bh();
1499 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1502 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1503 ret
= __ipv6_regen_rndid(idev
);
1513 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1514 unsigned long expires
, u32 flags
)
1516 struct fib6_config cfg
= {
1517 .fc_table
= RT6_TABLE_PREFIX
,
1518 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1519 .fc_ifindex
= dev
->ifindex
,
1520 .fc_expires
= expires
,
1522 .fc_flags
= RTF_UP
| flags
,
1525 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1527 /* Prevent useless cloning on PtP SIT.
1528 This thing is done here expecting that the whole
1529 class of non-broadcast devices need not cloning.
1531 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1532 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1533 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1536 ip6_route_add(&cfg
);
1539 /* Create "default" multicast route to the interface */
1541 static void addrconf_add_mroute(struct net_device
*dev
)
1543 struct fib6_config cfg
= {
1544 .fc_table
= RT6_TABLE_LOCAL
,
1545 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1546 .fc_ifindex
= dev
->ifindex
,
1551 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1553 ip6_route_add(&cfg
);
1556 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1557 static void sit_route_add(struct net_device
*dev
)
1559 struct fib6_config cfg
= {
1560 .fc_table
= RT6_TABLE_MAIN
,
1561 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1562 .fc_ifindex
= dev
->ifindex
,
1564 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1567 /* prefix length - 96 bits "::d.d.d.d" */
1568 ip6_route_add(&cfg
);
1572 static void addrconf_add_lroute(struct net_device
*dev
)
1574 struct in6_addr addr
;
1576 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1577 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1580 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1582 struct inet6_dev
*idev
;
1586 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1589 /* Add default multicast route */
1590 addrconf_add_mroute(dev
);
1592 /* Add link local route */
1593 addrconf_add_lroute(dev
);
1597 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1599 struct prefix_info
*pinfo
;
1603 unsigned long rt_expires
;
1604 struct inet6_dev
*in6_dev
;
1606 pinfo
= (struct prefix_info
*) opt
;
1608 if (len
< sizeof(struct prefix_info
)) {
1609 ADBG(("addrconf: prefix option too short\n"));
1614 * Validation checks ([ADDRCONF], page 19)
1617 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1619 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1622 valid_lft
= ntohl(pinfo
->valid
);
1623 prefered_lft
= ntohl(pinfo
->prefered
);
1625 if (prefered_lft
> valid_lft
) {
1626 if (net_ratelimit())
1627 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1631 in6_dev
= in6_dev_get(dev
);
1633 if (in6_dev
== NULL
) {
1634 if (net_ratelimit())
1635 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1640 * Two things going on here:
1641 * 1) Add routes for on-link prefixes
1642 * 2) Configure prefixes with the auto flag set
1645 /* Avoid arithmetic overflow. Really, we could
1646 save rt_expires in seconds, likely valid_lft,
1647 but it would require division in fib gc, that it
1650 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1651 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1653 rt_expires
= valid_lft
* HZ
;
1656 * We convert this (in jiffies) to clock_t later.
1657 * Avoid arithmetic overflow there as well.
1658 * Overflow can happen only if HZ < USER_HZ.
1660 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1661 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1663 if (pinfo
->onlink
) {
1664 struct rt6_info
*rt
;
1665 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1667 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1668 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1669 if (valid_lft
== 0) {
1673 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1676 } else if (valid_lft
) {
1677 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1678 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1681 dst_release(&rt
->u
.dst
);
1684 /* Try to figure out our local address for this prefix */
1686 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1687 struct inet6_ifaddr
* ifp
;
1688 struct in6_addr addr
;
1689 int create
= 0, update_lft
= 0;
1691 if (pinfo
->prefix_len
== 64) {
1692 memcpy(&addr
, &pinfo
->prefix
, 8);
1693 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1694 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1695 in6_dev_put(in6_dev
);
1700 if (net_ratelimit())
1701 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1703 in6_dev_put(in6_dev
);
1708 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1710 if (ifp
== NULL
&& valid_lft
) {
1711 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1714 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1715 if (in6_dev
->cnf
.optimistic_dad
&&
1716 !ipv6_devconf
.forwarding
)
1717 addr_flags
= IFA_F_OPTIMISTIC
;
1720 /* Do not allow to create too much of autoconfigured
1721 * addresses; this would be too easy way to crash kernel.
1723 if (!max_addresses
||
1724 ipv6_count_addresses(in6_dev
) < max_addresses
)
1725 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1726 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1729 if (!ifp
|| IS_ERR(ifp
)) {
1730 in6_dev_put(in6_dev
);
1734 update_lft
= create
= 1;
1735 ifp
->cstamp
= jiffies
;
1736 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1742 #ifdef CONFIG_IPV6_PRIVACY
1743 struct inet6_ifaddr
*ift
;
1747 /* update lifetime (RFC2462 5.5.3 e) */
1748 spin_lock(&ifp
->lock
);
1750 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1751 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1754 if (!update_lft
&& stored_lft
) {
1755 if (valid_lft
> MIN_VALID_LIFETIME
||
1756 valid_lft
> stored_lft
)
1758 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1759 /* valid_lft <= stored_lft is always true */
1763 valid_lft
= MIN_VALID_LIFETIME
;
1764 if (valid_lft
< prefered_lft
)
1765 prefered_lft
= valid_lft
;
1771 ifp
->valid_lft
= valid_lft
;
1772 ifp
->prefered_lft
= prefered_lft
;
1775 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1776 spin_unlock(&ifp
->lock
);
1778 if (!(flags
&IFA_F_TENTATIVE
))
1779 ipv6_ifa_notify(0, ifp
);
1781 spin_unlock(&ifp
->lock
);
1783 #ifdef CONFIG_IPV6_PRIVACY
1784 read_lock_bh(&in6_dev
->lock
);
1785 /* update all temporary addresses in the list */
1786 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1788 * When adjusting the lifetimes of an existing
1789 * temporary address, only lower the lifetimes.
1790 * Implementations must not increase the
1791 * lifetimes of an existing temporary address
1792 * when processing a Prefix Information Option.
1794 spin_lock(&ift
->lock
);
1796 if (ift
->valid_lft
> valid_lft
&&
1797 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1798 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1799 if (ift
->prefered_lft
> prefered_lft
&&
1800 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1801 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1802 spin_unlock(&ift
->lock
);
1803 if (!(flags
&IFA_F_TENTATIVE
))
1804 ipv6_ifa_notify(0, ift
);
1807 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1809 * When a new public address is created as described in [ADDRCONF],
1810 * also create a new temporary address.
1812 read_unlock_bh(&in6_dev
->lock
);
1813 ipv6_create_tempaddr(ifp
, NULL
);
1815 read_unlock_bh(&in6_dev
->lock
);
1822 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1823 in6_dev_put(in6_dev
);
1827 * Set destination address.
1828 * Special case for SIT interfaces where we create a new "virtual"
1831 int addrconf_set_dstaddr(void __user
*arg
)
1833 struct in6_ifreq ireq
;
1834 struct net_device
*dev
;
1840 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1843 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1849 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1850 if (dev
->type
== ARPHRD_SIT
) {
1853 struct ip_tunnel_parm p
;
1855 err
= -EADDRNOTAVAIL
;
1856 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1859 memset(&p
, 0, sizeof(p
));
1860 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1864 p
.iph
.protocol
= IPPROTO_IPV6
;
1866 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1868 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1869 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1874 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1876 err
= dev_open(dev
);
1887 * Manual configuration of address on an interface
1889 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1890 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1892 struct inet6_ifaddr
*ifp
;
1893 struct inet6_dev
*idev
;
1894 struct net_device
*dev
;
1896 u32 flags
= RTF_EXPIRES
;
1900 /* check the lifetime */
1901 if (!valid_lft
|| prefered_lft
> valid_lft
)
1904 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1907 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1910 scope
= ipv6_addr_scope(pfx
);
1912 if (valid_lft
== INFINITY_LIFE_TIME
) {
1913 ifa_flags
|= IFA_F_PERMANENT
;
1915 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1916 valid_lft
= 0x7FFFFFFF/HZ
;
1918 if (prefered_lft
== 0)
1919 ifa_flags
|= IFA_F_DEPRECATED
;
1920 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1921 (prefered_lft
!= INFINITY_LIFE_TIME
))
1922 prefered_lft
= 0x7FFFFFFF/HZ
;
1924 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1927 spin_lock_bh(&ifp
->lock
);
1928 ifp
->valid_lft
= valid_lft
;
1929 ifp
->prefered_lft
= prefered_lft
;
1930 ifp
->tstamp
= jiffies
;
1931 spin_unlock_bh(&ifp
->lock
);
1933 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1934 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1936 * Note that section 3.1 of RFC 4429 indicates
1937 * that the Optimistic flag should not be set for
1938 * manually configured addresses
1940 addrconf_dad_start(ifp
, 0);
1946 return PTR_ERR(ifp
);
1949 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1951 struct inet6_ifaddr
*ifp
;
1952 struct inet6_dev
*idev
;
1953 struct net_device
*dev
;
1955 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1958 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1961 read_lock_bh(&idev
->lock
);
1962 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1963 if (ifp
->prefix_len
== plen
&&
1964 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1966 read_unlock_bh(&idev
->lock
);
1970 /* If the last address is deleted administratively,
1971 disable IPv6 on this interface.
1973 if (idev
->addr_list
== NULL
)
1974 addrconf_ifdown(idev
->dev
, 1);
1978 read_unlock_bh(&idev
->lock
);
1979 return -EADDRNOTAVAIL
;
1983 int addrconf_add_ifaddr(void __user
*arg
)
1985 struct in6_ifreq ireq
;
1988 if (!capable(CAP_NET_ADMIN
))
1991 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1995 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
1996 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2001 int addrconf_del_ifaddr(void __user
*arg
)
2003 struct in6_ifreq ireq
;
2006 if (!capable(CAP_NET_ADMIN
))
2009 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2013 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2018 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2019 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2021 struct inet6_ifaddr
* ifp
;
2022 struct in6_addr addr
;
2023 struct net_device
*dev
;
2028 memset(&addr
, 0, sizeof(struct in6_addr
));
2029 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2031 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2032 addr
.s6_addr32
[0] = htonl(0xfe800000);
2035 scope
= IPV6_ADDR_COMPATv4
;
2038 if (addr
.s6_addr32
[3]) {
2039 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2041 spin_lock_bh(&ifp
->lock
);
2042 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2043 spin_unlock_bh(&ifp
->lock
);
2044 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2050 for_each_netdev(&init_net
, dev
) {
2051 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2052 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2053 struct in_ifaddr
* ifa
;
2057 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2060 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2062 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2064 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2065 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2069 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2074 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2077 spin_lock_bh(&ifp
->lock
);
2078 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2079 spin_unlock_bh(&ifp
->lock
);
2080 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2089 static void init_loopback(struct net_device
*dev
)
2091 struct inet6_dev
*idev
;
2092 struct inet6_ifaddr
* ifp
;
2098 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2099 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2103 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2105 spin_lock_bh(&ifp
->lock
);
2106 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2107 spin_unlock_bh(&ifp
->lock
);
2108 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2113 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2115 struct inet6_ifaddr
* ifp
;
2116 u32 addr_flags
= IFA_F_PERMANENT
;
2118 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2119 if (idev
->cnf
.optimistic_dad
&&
2120 !ipv6_devconf
.forwarding
)
2121 addr_flags
|= IFA_F_OPTIMISTIC
;
2125 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2127 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2128 addrconf_dad_start(ifp
, 0);
2133 static void addrconf_dev_config(struct net_device
*dev
)
2135 struct in6_addr addr
;
2136 struct inet6_dev
* idev
;
2140 if ((dev
->type
!= ARPHRD_ETHER
) &&
2141 (dev
->type
!= ARPHRD_FDDI
) &&
2142 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2143 (dev
->type
!= ARPHRD_ARCNET
) &&
2144 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2145 /* Alas, we support only Ethernet autoconfiguration. */
2149 idev
= addrconf_add_dev(dev
);
2153 memset(&addr
, 0, sizeof(struct in6_addr
));
2154 addr
.s6_addr32
[0] = htonl(0xFE800000);
2156 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2157 addrconf_add_linklocal(idev
, &addr
);
2160 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2161 static void addrconf_sit_config(struct net_device
*dev
)
2163 struct inet6_dev
*idev
;
2168 * Configure the tunnel with one of our IPv4
2169 * addresses... we should configure all of
2170 * our v4 addrs in the tunnel
2173 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2174 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2178 sit_add_v4_addrs(idev
);
2180 if (dev
->flags
&IFF_POINTOPOINT
) {
2181 addrconf_add_mroute(dev
);
2182 addrconf_add_lroute(dev
);
2189 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2191 struct in6_addr lladdr
;
2193 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2194 addrconf_add_linklocal(idev
, &lladdr
);
2200 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2202 struct net_device
*link_dev
;
2204 /* first try to inherit the link-local address from the link device */
2205 if (idev
->dev
->iflink
&&
2206 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2207 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2210 /* then try to inherit it from any device */
2211 for_each_netdev(&init_net
, link_dev
) {
2212 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2215 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2219 * Autoconfigure tunnel with a link-local address so routing protocols,
2220 * DHCPv6, MLD etc. can be run over the virtual link
2223 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2225 struct inet6_dev
*idev
;
2229 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2230 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2233 ip6_tnl_add_linklocal(idev
);
2236 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2239 struct net_device
*dev
= (struct net_device
*) data
;
2240 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2241 int run_pending
= 0;
2244 if (dev
->nd_net
!= &init_net
)
2248 case NETDEV_REGISTER
:
2249 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2250 idev
= ipv6_add_dev(dev
);
2252 return notifier_from_errno(-ENOMEM
);
2257 if (dev
->flags
& IFF_SLAVE
)
2260 if (event
== NETDEV_UP
) {
2261 if (!addrconf_qdisc_ok(dev
)) {
2262 /* device is not ready yet. */
2264 "ADDRCONF(NETDEV_UP): %s: "
2265 "link is not ready\n",
2270 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2271 idev
= ipv6_add_dev(dev
);
2274 idev
->if_flags
|= IF_READY
;
2276 if (!addrconf_qdisc_ok(dev
)) {
2277 /* device is still not ready. */
2282 if (idev
->if_flags
& IF_READY
) {
2283 /* device is already configured. */
2286 idev
->if_flags
|= IF_READY
;
2290 "ADDRCONF(NETDEV_CHANGE): %s: "
2291 "link becomes ready\n",
2298 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2300 addrconf_sit_config(dev
);
2303 case ARPHRD_TUNNEL6
:
2304 addrconf_ip6_tnl_config(dev
);
2306 case ARPHRD_LOOPBACK
:
2311 addrconf_dev_config(dev
);
2316 addrconf_dad_run(idev
);
2318 /* If the MTU changed during the interface down, when the
2319 interface up, the changed MTU must be reflected in the
2320 idev as well as routers.
2322 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2323 rt6_mtu_change(dev
, dev
->mtu
);
2324 idev
->cnf
.mtu6
= dev
->mtu
;
2326 idev
->tstamp
= jiffies
;
2327 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2328 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2329 stop IPv6 on this interface.
2331 if (dev
->mtu
< IPV6_MIN_MTU
)
2332 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2336 case NETDEV_CHANGEMTU
:
2337 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2338 rt6_mtu_change(dev
, dev
->mtu
);
2339 idev
->cnf
.mtu6
= dev
->mtu
;
2343 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2344 idev
= ipv6_add_dev(dev
);
2349 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2352 case NETDEV_UNREGISTER
:
2354 * Remove all addresses from this interface.
2356 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2359 case NETDEV_CHANGENAME
:
2361 snmp6_unregister_dev(idev
);
2362 #ifdef CONFIG_SYSCTL
2363 addrconf_sysctl_unregister(&idev
->cnf
);
2364 neigh_sysctl_unregister(idev
->nd_parms
);
2365 neigh_sysctl_register(dev
, idev
->nd_parms
,
2366 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2367 &ndisc_ifinfo_sysctl_change
,
2369 addrconf_sysctl_register(idev
, &idev
->cnf
);
2371 err
= snmp6_register_dev(idev
);
2373 return notifier_from_errno(err
);
2382 * addrconf module should be notified of a device going up
2384 static struct notifier_block ipv6_dev_notf
= {
2385 .notifier_call
= addrconf_notify
,
2389 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2391 struct inet6_dev
*idev
;
2392 struct inet6_ifaddr
*ifa
, **bifa
;
2397 if (dev
== init_net
.loopback_dev
&& how
== 1)
2401 neigh_ifdown(&nd_tbl
, dev
);
2403 idev
= __in6_dev_get(dev
);
2407 /* Step 1: remove reference to ipv6 device from parent device.
2413 /* protected by rtnl_lock */
2414 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2416 /* Step 1.5: remove snmp6 entry */
2417 snmp6_unregister_dev(idev
);
2421 /* Step 2: clear hash table */
2422 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2423 bifa
= &inet6_addr_lst
[i
];
2425 write_lock_bh(&addrconf_hash_lock
);
2426 while ((ifa
= *bifa
) != NULL
) {
2427 if (ifa
->idev
== idev
) {
2428 *bifa
= ifa
->lst_next
;
2429 ifa
->lst_next
= NULL
;
2430 addrconf_del_timer(ifa
);
2434 bifa
= &ifa
->lst_next
;
2436 write_unlock_bh(&addrconf_hash_lock
);
2439 write_lock_bh(&idev
->lock
);
2441 /* Step 3: clear flags for stateless addrconf */
2443 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2445 /* Step 4: clear address list */
2446 #ifdef CONFIG_IPV6_PRIVACY
2447 if (how
== 1 && del_timer(&idev
->regen_timer
))
2450 /* clear tempaddr list */
2451 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2452 idev
->tempaddr_list
= ifa
->tmp_next
;
2453 ifa
->tmp_next
= NULL
;
2455 write_unlock_bh(&idev
->lock
);
2456 spin_lock_bh(&ifa
->lock
);
2459 in6_ifa_put(ifa
->ifpub
);
2462 spin_unlock_bh(&ifa
->lock
);
2464 write_lock_bh(&idev
->lock
);
2467 while ((ifa
= idev
->addr_list
) != NULL
) {
2468 idev
->addr_list
= ifa
->if_next
;
2469 ifa
->if_next
= NULL
;
2471 addrconf_del_timer(ifa
);
2472 write_unlock_bh(&idev
->lock
);
2474 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2475 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2478 write_lock_bh(&idev
->lock
);
2480 write_unlock_bh(&idev
->lock
);
2482 /* Step 5: Discard multicast list */
2485 ipv6_mc_destroy_dev(idev
);
2489 idev
->tstamp
= jiffies
;
2491 /* Shot the device (if unregistered) */
2494 #ifdef CONFIG_SYSCTL
2495 addrconf_sysctl_unregister(&idev
->cnf
);
2496 neigh_sysctl_unregister(idev
->nd_parms
);
2498 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2499 neigh_ifdown(&nd_tbl
, dev
);
2505 static void addrconf_rs_timer(unsigned long data
)
2507 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2509 if (ifp
->idev
->cnf
.forwarding
)
2512 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2514 * Announcement received after solicitation
2520 spin_lock(&ifp
->lock
);
2521 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2522 struct in6_addr all_routers
;
2524 /* The wait after the last probe can be shorter */
2525 addrconf_mod_timer(ifp
, AC_RS
,
2526 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2527 ifp
->idev
->cnf
.rtr_solicit_delay
:
2528 ifp
->idev
->cnf
.rtr_solicit_interval
);
2529 spin_unlock(&ifp
->lock
);
2531 ipv6_addr_all_routers(&all_routers
);
2533 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2535 spin_unlock(&ifp
->lock
);
2537 * Note: we do not support deprecated "all on-link"
2538 * assumption any longer.
2540 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2541 ifp
->idev
->dev
->name
);
2549 * Duplicate Address Detection
2551 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2553 unsigned long rand_num
;
2554 struct inet6_dev
*idev
= ifp
->idev
;
2556 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2559 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2561 ifp
->probes
= idev
->cnf
.dad_transmits
;
2562 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2565 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2567 struct inet6_dev
*idev
= ifp
->idev
;
2568 struct net_device
*dev
= idev
->dev
;
2570 addrconf_join_solict(dev
, &ifp
->addr
);
2572 net_srandom(ifp
->addr
.s6_addr32
[3]);
2574 read_lock_bh(&idev
->lock
);
2577 spin_lock_bh(&ifp
->lock
);
2579 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2580 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2581 ifp
->flags
& IFA_F_NODAD
) {
2582 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2583 spin_unlock_bh(&ifp
->lock
);
2584 read_unlock_bh(&idev
->lock
);
2586 addrconf_dad_completed(ifp
);
2590 if (!(idev
->if_flags
& IF_READY
)) {
2591 spin_unlock_bh(&ifp
->lock
);
2592 read_unlock_bh(&idev
->lock
);
2594 * If the defice is not ready:
2595 * - keep it tentative if it is a permanent address.
2596 * - otherwise, kill it.
2599 addrconf_dad_stop(ifp
);
2604 * Optimistic nodes can start receiving
2607 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2608 ip6_ins_rt(ifp
->rt
);
2610 addrconf_dad_kick(ifp
);
2611 spin_unlock_bh(&ifp
->lock
);
2613 read_unlock_bh(&idev
->lock
);
2616 static void addrconf_dad_timer(unsigned long data
)
2618 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2619 struct inet6_dev
*idev
= ifp
->idev
;
2620 struct in6_addr unspec
;
2621 struct in6_addr mcaddr
;
2623 read_lock_bh(&idev
->lock
);
2625 read_unlock_bh(&idev
->lock
);
2628 spin_lock_bh(&ifp
->lock
);
2629 if (ifp
->probes
== 0) {
2631 * DAD was successful
2634 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2635 spin_unlock_bh(&ifp
->lock
);
2636 read_unlock_bh(&idev
->lock
);
2638 addrconf_dad_completed(ifp
);
2644 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2645 spin_unlock_bh(&ifp
->lock
);
2646 read_unlock_bh(&idev
->lock
);
2648 /* send a neighbour solicitation for our addr */
2649 memset(&unspec
, 0, sizeof(unspec
));
2650 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2651 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2656 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2658 struct net_device
* dev
= ifp
->idev
->dev
;
2661 * Configure the address for reception. Now it is valid.
2664 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2666 /* If added prefix is link local and forwarding is off,
2667 start sending router solicitations.
2670 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2671 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2672 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2673 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2674 struct in6_addr all_routers
;
2676 ipv6_addr_all_routers(&all_routers
);
2679 * If a host as already performed a random delay
2680 * [...] as part of DAD [...] there is no need
2681 * to delay again before sending the first RS
2683 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2685 spin_lock_bh(&ifp
->lock
);
2687 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2688 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2689 spin_unlock_bh(&ifp
->lock
);
2693 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2694 struct inet6_ifaddr
*ifp
;
2696 read_lock_bh(&idev
->lock
);
2697 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2698 spin_lock_bh(&ifp
->lock
);
2699 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2700 spin_unlock_bh(&ifp
->lock
);
2703 spin_unlock_bh(&ifp
->lock
);
2704 addrconf_dad_kick(ifp
);
2706 read_unlock_bh(&idev
->lock
);
2709 #ifdef CONFIG_PROC_FS
2710 struct if6_iter_state
{
2714 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2716 struct inet6_ifaddr
*ifa
= NULL
;
2717 struct if6_iter_state
*state
= seq
->private;
2719 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2720 ifa
= inet6_addr_lst
[state
->bucket
];
2727 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2729 struct if6_iter_state
*state
= seq
->private;
2731 ifa
= ifa
->lst_next
;
2733 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2734 ifa
= inet6_addr_lst
[state
->bucket
];
2740 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2742 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2745 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2747 return pos
? NULL
: ifa
;
2750 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2752 read_lock_bh(&addrconf_hash_lock
);
2753 return if6_get_idx(seq
, *pos
);
2756 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2758 struct inet6_ifaddr
*ifa
;
2760 ifa
= if6_get_next(seq
, v
);
2765 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2767 read_unlock_bh(&addrconf_hash_lock
);
2770 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2772 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2774 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2776 ifp
->idev
->dev
->ifindex
,
2780 ifp
->idev
->dev
->name
);
2784 static const struct seq_operations if6_seq_ops
= {
2785 .start
= if6_seq_start
,
2786 .next
= if6_seq_next
,
2787 .show
= if6_seq_show
,
2788 .stop
= if6_seq_stop
,
2791 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2793 return seq_open_private(file
, &if6_seq_ops
,
2794 sizeof(struct if6_iter_state
));
2797 static const struct file_operations if6_fops
= {
2798 .owner
= THIS_MODULE
,
2799 .open
= if6_seq_open
,
2801 .llseek
= seq_lseek
,
2802 .release
= seq_release_private
,
2805 int __init
if6_proc_init(void)
2807 if (!proc_net_fops_create(&init_net
, "if_inet6", S_IRUGO
, &if6_fops
))
2812 void if6_proc_exit(void)
2814 proc_net_remove(&init_net
, "if_inet6");
2816 #endif /* CONFIG_PROC_FS */
2818 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2819 /* Check if address is a home address configured on any interface. */
2820 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2823 struct inet6_ifaddr
* ifp
;
2824 u8 hash
= ipv6_addr_hash(addr
);
2825 read_lock_bh(&addrconf_hash_lock
);
2826 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2827 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2828 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2833 read_unlock_bh(&addrconf_hash_lock
);
2839 * Periodic address status verification
2842 static void addrconf_verify(unsigned long foo
)
2844 struct inet6_ifaddr
*ifp
;
2845 unsigned long now
, next
;
2848 spin_lock_bh(&addrconf_verify_lock
);
2850 next
= now
+ ADDR_CHECK_FREQUENCY
;
2852 del_timer(&addr_chk_timer
);
2854 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2857 read_lock(&addrconf_hash_lock
);
2858 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2860 #ifdef CONFIG_IPV6_PRIVACY
2861 unsigned long regen_advance
;
2864 if (ifp
->flags
& IFA_F_PERMANENT
)
2867 spin_lock(&ifp
->lock
);
2868 age
= (now
- ifp
->tstamp
) / HZ
;
2870 #ifdef CONFIG_IPV6_PRIVACY
2871 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2872 ifp
->idev
->cnf
.dad_transmits
*
2873 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2876 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2877 age
>= ifp
->valid_lft
) {
2878 spin_unlock(&ifp
->lock
);
2880 read_unlock(&addrconf_hash_lock
);
2883 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2884 spin_unlock(&ifp
->lock
);
2886 } else if (age
>= ifp
->prefered_lft
) {
2887 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2890 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2892 ifp
->flags
|= IFA_F_DEPRECATED
;
2895 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2896 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2898 spin_unlock(&ifp
->lock
);
2902 read_unlock(&addrconf_hash_lock
);
2904 ipv6_ifa_notify(0, ifp
);
2908 #ifdef CONFIG_IPV6_PRIVACY
2909 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2910 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2911 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2912 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2913 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2914 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2915 if (!ifp
->regen_count
&& ifpub
) {
2918 in6_ifa_hold(ifpub
);
2919 spin_unlock(&ifp
->lock
);
2920 read_unlock(&addrconf_hash_lock
);
2921 spin_lock(&ifpub
->lock
);
2922 ifpub
->regen_count
= 0;
2923 spin_unlock(&ifpub
->lock
);
2924 ipv6_create_tempaddr(ifpub
, ifp
);
2929 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2930 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2931 spin_unlock(&ifp
->lock
);
2934 /* ifp->prefered_lft <= ifp->valid_lft */
2935 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2936 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2937 spin_unlock(&ifp
->lock
);
2940 read_unlock(&addrconf_hash_lock
);
2943 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2944 add_timer(&addr_chk_timer
);
2945 spin_unlock_bh(&addrconf_verify_lock
);
2948 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2950 struct in6_addr
*pfx
= NULL
;
2953 pfx
= nla_data(addr
);
2956 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2959 pfx
= nla_data(local
);
2965 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
2966 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2967 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2968 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2972 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2974 struct net
*net
= skb
->sk
->sk_net
;
2975 struct ifaddrmsg
*ifm
;
2976 struct nlattr
*tb
[IFA_MAX
+1];
2977 struct in6_addr
*pfx
;
2980 if (net
!= &init_net
)
2983 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2987 ifm
= nlmsg_data(nlh
);
2988 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2992 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2995 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
2996 u32 prefered_lft
, u32 valid_lft
)
2998 u32 flags
= RTF_EXPIRES
;
3000 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3003 if (valid_lft
== INFINITY_LIFE_TIME
) {
3004 ifa_flags
|= IFA_F_PERMANENT
;
3006 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3007 valid_lft
= 0x7FFFFFFF/HZ
;
3009 if (prefered_lft
== 0)
3010 ifa_flags
|= IFA_F_DEPRECATED
;
3011 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3012 (prefered_lft
!= INFINITY_LIFE_TIME
))
3013 prefered_lft
= 0x7FFFFFFF/HZ
;
3015 spin_lock_bh(&ifp
->lock
);
3016 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3017 ifp
->tstamp
= jiffies
;
3018 ifp
->valid_lft
= valid_lft
;
3019 ifp
->prefered_lft
= prefered_lft
;
3021 spin_unlock_bh(&ifp
->lock
);
3022 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3023 ipv6_ifa_notify(0, ifp
);
3025 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3026 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3033 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3035 struct net
*net
= skb
->sk
->sk_net
;
3036 struct ifaddrmsg
*ifm
;
3037 struct nlattr
*tb
[IFA_MAX
+1];
3038 struct in6_addr
*pfx
;
3039 struct inet6_ifaddr
*ifa
;
3040 struct net_device
*dev
;
3041 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3045 if (net
!= &init_net
)
3048 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3052 ifm
= nlmsg_data(nlh
);
3053 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3057 if (tb
[IFA_CACHEINFO
]) {
3058 struct ifa_cacheinfo
*ci
;
3060 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3061 valid_lft
= ci
->ifa_valid
;
3062 preferred_lft
= ci
->ifa_prefered
;
3064 preferred_lft
= INFINITY_LIFE_TIME
;
3065 valid_lft
= INFINITY_LIFE_TIME
;
3068 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3072 /* We ignore other flags so far. */
3073 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3075 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3078 * It would be best to check for !NLM_F_CREATE here but
3079 * userspace alreay relies on not having to provide this.
3081 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3082 ifa_flags
, preferred_lft
, valid_lft
);
3085 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3086 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3089 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3096 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3097 u8 scope
, int ifindex
)
3099 struct ifaddrmsg
*ifm
;
3101 ifm
= nlmsg_data(nlh
);
3102 ifm
->ifa_family
= AF_INET6
;
3103 ifm
->ifa_prefixlen
= prefixlen
;
3104 ifm
->ifa_flags
= flags
;
3105 ifm
->ifa_scope
= scope
;
3106 ifm
->ifa_index
= ifindex
;
3109 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3110 unsigned long tstamp
, u32 preferred
, u32 valid
)
3112 struct ifa_cacheinfo ci
;
3114 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3115 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3116 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3117 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3118 ci
.ifa_prefered
= preferred
;
3119 ci
.ifa_valid
= valid
;
3121 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3124 static inline int rt_scope(int ifa_scope
)
3126 if (ifa_scope
& IFA_HOST
)
3127 return RT_SCOPE_HOST
;
3128 else if (ifa_scope
& IFA_LINK
)
3129 return RT_SCOPE_LINK
;
3130 else if (ifa_scope
& IFA_SITE
)
3131 return RT_SCOPE_SITE
;
3133 return RT_SCOPE_UNIVERSE
;
3136 static inline int inet6_ifaddr_msgsize(void)
3138 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3139 + nla_total_size(16) /* IFA_ADDRESS */
3140 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3143 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3144 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3146 struct nlmsghdr
*nlh
;
3147 u32 preferred
, valid
;
3149 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3153 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3154 ifa
->idev
->dev
->ifindex
);
3156 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3157 preferred
= ifa
->prefered_lft
;
3158 valid
= ifa
->valid_lft
;
3159 if (preferred
!= INFINITY_LIFE_TIME
) {
3160 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3162 if (valid
!= INFINITY_LIFE_TIME
)
3166 preferred
= INFINITY_LIFE_TIME
;
3167 valid
= INFINITY_LIFE_TIME
;
3170 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3171 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3172 nlmsg_cancel(skb
, nlh
);
3176 return nlmsg_end(skb
, nlh
);
3179 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3180 u32 pid
, u32 seq
, int event
, u16 flags
)
3182 struct nlmsghdr
*nlh
;
3183 u8 scope
= RT_SCOPE_UNIVERSE
;
3184 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3186 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3187 scope
= RT_SCOPE_SITE
;
3189 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3193 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3194 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3195 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3196 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3197 nlmsg_cancel(skb
, nlh
);
3201 return nlmsg_end(skb
, nlh
);
3204 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3205 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3207 struct nlmsghdr
*nlh
;
3208 u8 scope
= RT_SCOPE_UNIVERSE
;
3209 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3211 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3212 scope
= RT_SCOPE_SITE
;
3214 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3218 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3219 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3220 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3221 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3222 nlmsg_cancel(skb
, nlh
);
3226 return nlmsg_end(skb
, nlh
);
3236 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3237 enum addr_type_t type
)
3240 int s_idx
, s_ip_idx
;
3242 struct net_device
*dev
;
3243 struct inet6_dev
*idev
= NULL
;
3244 struct inet6_ifaddr
*ifa
;
3245 struct ifmcaddr6
*ifmca
;
3246 struct ifacaddr6
*ifaca
;
3248 s_idx
= cb
->args
[0];
3249 s_ip_idx
= ip_idx
= cb
->args
[1];
3252 for_each_netdev(&init_net
, dev
) {
3258 if ((idev
= in6_dev_get(dev
)) == NULL
)
3260 read_lock_bh(&idev
->lock
);
3263 /* unicast address incl. temp addr */
3264 for (ifa
= idev
->addr_list
; ifa
;
3265 ifa
= ifa
->if_next
, ip_idx
++) {
3266 if (ip_idx
< s_ip_idx
)
3268 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3269 NETLINK_CB(cb
->skb
).pid
,
3270 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3275 case MULTICAST_ADDR
:
3276 /* multicast address */
3277 for (ifmca
= idev
->mc_list
; ifmca
;
3278 ifmca
= ifmca
->next
, ip_idx
++) {
3279 if (ip_idx
< s_ip_idx
)
3281 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3282 NETLINK_CB(cb
->skb
).pid
,
3283 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3289 /* anycast address */
3290 for (ifaca
= idev
->ac_list
; ifaca
;
3291 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3292 if (ip_idx
< s_ip_idx
)
3294 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3295 NETLINK_CB(cb
->skb
).pid
,
3296 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3304 read_unlock_bh(&idev
->lock
);
3311 read_unlock_bh(&idev
->lock
);
3315 cb
->args
[1] = ip_idx
;
3319 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3321 struct net
*net
= skb
->sk
->sk_net
;
3322 enum addr_type_t type
= UNICAST_ADDR
;
3324 if (net
!= &init_net
)
3327 return inet6_dump_addr(skb
, cb
, type
);
3330 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3332 struct net
*net
= skb
->sk
->sk_net
;
3333 enum addr_type_t type
= MULTICAST_ADDR
;
3335 if (net
!= &init_net
)
3338 return inet6_dump_addr(skb
, cb
, type
);
3342 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3344 struct net
*net
= skb
->sk
->sk_net
;
3345 enum addr_type_t type
= ANYCAST_ADDR
;
3347 if (net
!= &init_net
)
3350 return inet6_dump_addr(skb
, cb
, type
);
3353 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3356 struct net
*net
= in_skb
->sk
->sk_net
;
3357 struct ifaddrmsg
*ifm
;
3358 struct nlattr
*tb
[IFA_MAX
+1];
3359 struct in6_addr
*addr
= NULL
;
3360 struct net_device
*dev
= NULL
;
3361 struct inet6_ifaddr
*ifa
;
3362 struct sk_buff
*skb
;
3365 if (net
!= &init_net
)
3368 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3372 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3378 ifm
= nlmsg_data(nlh
);
3380 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3382 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3383 err
= -EADDRNOTAVAIL
;
3387 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3392 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3393 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3395 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3396 WARN_ON(err
== -EMSGSIZE
);
3400 err
= rtnl_unicast(skb
, &init_net
, NETLINK_CB(in_skb
).pid
);
3407 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3409 struct sk_buff
*skb
;
3412 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3416 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3418 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3419 WARN_ON(err
== -EMSGSIZE
);
3423 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3426 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3429 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3430 __s32
*array
, int bytes
)
3432 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3434 memset(array
, 0, bytes
);
3435 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3436 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3437 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3438 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3439 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3440 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3441 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3442 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3443 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3444 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3445 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3446 #ifdef CONFIG_IPV6_PRIVACY
3447 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3448 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3449 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3450 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3451 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3453 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3454 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3455 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3456 #ifdef CONFIG_IPV6_ROUTER_PREF
3457 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3458 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3459 #ifdef CONFIG_IPV6_ROUTE_INFO
3460 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3463 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3464 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3465 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3466 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3470 static inline size_t inet6_if_nlmsg_size(void)
3472 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3473 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3474 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3475 + nla_total_size(4) /* IFLA_MTU */
3476 + nla_total_size(4) /* IFLA_LINK */
3477 + nla_total_size( /* IFLA_PROTINFO */
3478 nla_total_size(4) /* IFLA_INET6_FLAGS */
3479 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3480 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3481 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3482 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3486 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3490 int pad
= bytes
- sizeof(u64
) * items
;
3493 /* Use put_unaligned() because stats may not be aligned for u64. */
3494 put_unaligned(items
, &stats
[0]);
3495 for (i
= 1; i
< items
; i
++)
3496 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3498 memset(&stats
[items
], 0, pad
);
3501 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3505 case IFLA_INET6_STATS
:
3506 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3508 case IFLA_INET6_ICMP6STATS
:
3509 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3514 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3515 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3517 struct net_device
*dev
= idev
->dev
;
3519 struct ifinfomsg
*hdr
;
3520 struct nlmsghdr
*nlh
;
3522 struct ifla_cacheinfo ci
;
3524 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3528 hdr
= nlmsg_data(nlh
);
3529 hdr
->ifi_family
= AF_INET6
;
3531 hdr
->ifi_type
= dev
->type
;
3532 hdr
->ifi_index
= dev
->ifindex
;
3533 hdr
->ifi_flags
= dev_get_flags(dev
);
3534 hdr
->ifi_change
= 0;
3536 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3539 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3541 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3542 if (dev
->ifindex
!= dev
->iflink
)
3543 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3545 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3546 if (protoinfo
== NULL
)
3547 goto nla_put_failure
;
3549 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3551 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3552 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3553 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3554 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3555 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3556 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3558 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3560 goto nla_put_failure
;
3561 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3563 /* XXX - MC not implemented */
3565 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3567 goto nla_put_failure
;
3568 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3570 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3572 goto nla_put_failure
;
3573 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3575 nla_nest_end(skb
, protoinfo
);
3576 return nlmsg_end(skb
, nlh
);
3579 nlmsg_cancel(skb
, nlh
);
3583 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3585 struct net
*net
= skb
->sk
->sk_net
;
3587 int s_idx
= cb
->args
[0];
3588 struct net_device
*dev
;
3589 struct inet6_dev
*idev
;
3591 if (net
!= &init_net
)
3594 read_lock(&dev_base_lock
);
3596 for_each_netdev(&init_net
, dev
) {
3599 if ((idev
= in6_dev_get(dev
)) == NULL
)
3601 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3602 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3609 read_unlock(&dev_base_lock
);
3615 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3617 struct sk_buff
*skb
;
3620 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3624 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3626 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3627 WARN_ON(err
== -EMSGSIZE
);
3631 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3634 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3637 static inline size_t inet6_prefix_nlmsg_size(void)
3639 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3640 + nla_total_size(sizeof(struct in6_addr
))
3641 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3644 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3645 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3646 int event
, unsigned int flags
)
3648 struct prefixmsg
*pmsg
;
3649 struct nlmsghdr
*nlh
;
3650 struct prefix_cacheinfo ci
;
3652 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3656 pmsg
= nlmsg_data(nlh
);
3657 pmsg
->prefix_family
= AF_INET6
;
3658 pmsg
->prefix_pad1
= 0;
3659 pmsg
->prefix_pad2
= 0;
3660 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3661 pmsg
->prefix_len
= pinfo
->prefix_len
;
3662 pmsg
->prefix_type
= pinfo
->type
;
3663 pmsg
->prefix_pad3
= 0;
3664 pmsg
->prefix_flags
= 0;
3666 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3667 if (pinfo
->autoconf
)
3668 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3670 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3672 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3673 ci
.valid_time
= ntohl(pinfo
->valid
);
3674 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3676 return nlmsg_end(skb
, nlh
);
3679 nlmsg_cancel(skb
, nlh
);
3683 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3684 struct prefix_info
*pinfo
)
3686 struct sk_buff
*skb
;
3689 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3693 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3695 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3696 WARN_ON(err
== -EMSGSIZE
);
3700 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3703 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_PREFIX
, err
);
3706 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3708 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3713 * If the address was optimistic
3714 * we inserted the route at the start of
3715 * our DAD process, so we don't need
3718 if (!(ifp
->rt
->rt6i_node
))
3719 ip6_ins_rt(ifp
->rt
);
3720 if (ifp
->idev
->cnf
.forwarding
)
3721 addrconf_join_anycast(ifp
);
3724 if (ifp
->idev
->cnf
.forwarding
)
3725 addrconf_leave_anycast(ifp
);
3726 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3727 dst_hold(&ifp
->rt
->u
.dst
);
3728 if (ip6_del_rt(ifp
->rt
))
3729 dst_free(&ifp
->rt
->u
.dst
);
3734 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3737 if (likely(ifp
->idev
->dead
== 0))
3738 __ipv6_ifa_notify(event
, ifp
);
3739 rcu_read_unlock_bh();
3742 #ifdef CONFIG_SYSCTL
3745 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3746 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3748 int *valp
= ctl
->data
;
3752 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3754 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3755 if (valp
!= &ipv6_devconf
.forwarding
) {
3756 if ((!*valp
) ^ (!val
)) {
3757 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3760 dev_forward_change(idev
);
3763 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3764 addrconf_forward_change();
3767 rt6_purge_dflt_routers();
3773 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3774 int __user
*name
, int nlen
,
3775 void __user
*oldval
,
3776 size_t __user
*oldlenp
,
3777 void __user
*newval
, size_t newlen
)
3779 int *valp
= table
->data
;
3782 if (!newval
|| !newlen
)
3784 if (newlen
!= sizeof(int))
3786 if (get_user(new, (int __user
*)newval
))
3790 if (oldval
&& oldlenp
) {
3792 if (get_user(len
, oldlenp
))
3795 if (len
> table
->maxlen
)
3796 len
= table
->maxlen
;
3797 if (copy_to_user(oldval
, valp
, len
))
3799 if (put_user(len
, oldlenp
))
3804 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3805 if (valp
!= &ipv6_devconf
.forwarding
) {
3806 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3808 if (unlikely(idev
== NULL
))
3810 changed
= (!*valp
) ^ (!new);
3813 dev_forward_change(idev
);
3816 addrconf_forward_change();
3820 rt6_purge_dflt_routers();
3827 static struct addrconf_sysctl_table
3829 struct ctl_table_header
*sysctl_header
;
3830 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3831 ctl_table addrconf_dev
[2];
3832 ctl_table addrconf_conf_dir
[2];
3833 ctl_table addrconf_proto_dir
[2];
3834 ctl_table addrconf_root_dir
[2];
3835 } addrconf_sysctl __read_mostly
= {
3836 .sysctl_header
= NULL
,
3839 .ctl_name
= NET_IPV6_FORWARDING
,
3840 .procname
= "forwarding",
3841 .data
= &ipv6_devconf
.forwarding
,
3842 .maxlen
= sizeof(int),
3844 .proc_handler
= &addrconf_sysctl_forward
,
3845 .strategy
= &addrconf_sysctl_forward_strategy
,
3848 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3849 .procname
= "hop_limit",
3850 .data
= &ipv6_devconf
.hop_limit
,
3851 .maxlen
= sizeof(int),
3853 .proc_handler
= proc_dointvec
,
3856 .ctl_name
= NET_IPV6_MTU
,
3858 .data
= &ipv6_devconf
.mtu6
,
3859 .maxlen
= sizeof(int),
3861 .proc_handler
= &proc_dointvec
,
3864 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3865 .procname
= "accept_ra",
3866 .data
= &ipv6_devconf
.accept_ra
,
3867 .maxlen
= sizeof(int),
3869 .proc_handler
= &proc_dointvec
,
3872 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3873 .procname
= "accept_redirects",
3874 .data
= &ipv6_devconf
.accept_redirects
,
3875 .maxlen
= sizeof(int),
3877 .proc_handler
= &proc_dointvec
,
3880 .ctl_name
= NET_IPV6_AUTOCONF
,
3881 .procname
= "autoconf",
3882 .data
= &ipv6_devconf
.autoconf
,
3883 .maxlen
= sizeof(int),
3885 .proc_handler
= &proc_dointvec
,
3888 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3889 .procname
= "dad_transmits",
3890 .data
= &ipv6_devconf
.dad_transmits
,
3891 .maxlen
= sizeof(int),
3893 .proc_handler
= &proc_dointvec
,
3896 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3897 .procname
= "router_solicitations",
3898 .data
= &ipv6_devconf
.rtr_solicits
,
3899 .maxlen
= sizeof(int),
3901 .proc_handler
= &proc_dointvec
,
3904 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3905 .procname
= "router_solicitation_interval",
3906 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3907 .maxlen
= sizeof(int),
3909 .proc_handler
= &proc_dointvec_jiffies
,
3910 .strategy
= &sysctl_jiffies
,
3913 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3914 .procname
= "router_solicitation_delay",
3915 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3916 .maxlen
= sizeof(int),
3918 .proc_handler
= &proc_dointvec_jiffies
,
3919 .strategy
= &sysctl_jiffies
,
3922 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3923 .procname
= "force_mld_version",
3924 .data
= &ipv6_devconf
.force_mld_version
,
3925 .maxlen
= sizeof(int),
3927 .proc_handler
= &proc_dointvec
,
3929 #ifdef CONFIG_IPV6_PRIVACY
3931 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3932 .procname
= "use_tempaddr",
3933 .data
= &ipv6_devconf
.use_tempaddr
,
3934 .maxlen
= sizeof(int),
3936 .proc_handler
= &proc_dointvec
,
3939 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3940 .procname
= "temp_valid_lft",
3941 .data
= &ipv6_devconf
.temp_valid_lft
,
3942 .maxlen
= sizeof(int),
3944 .proc_handler
= &proc_dointvec
,
3947 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3948 .procname
= "temp_prefered_lft",
3949 .data
= &ipv6_devconf
.temp_prefered_lft
,
3950 .maxlen
= sizeof(int),
3952 .proc_handler
= &proc_dointvec
,
3955 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3956 .procname
= "regen_max_retry",
3957 .data
= &ipv6_devconf
.regen_max_retry
,
3958 .maxlen
= sizeof(int),
3960 .proc_handler
= &proc_dointvec
,
3963 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3964 .procname
= "max_desync_factor",
3965 .data
= &ipv6_devconf
.max_desync_factor
,
3966 .maxlen
= sizeof(int),
3968 .proc_handler
= &proc_dointvec
,
3972 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3973 .procname
= "max_addresses",
3974 .data
= &ipv6_devconf
.max_addresses
,
3975 .maxlen
= sizeof(int),
3977 .proc_handler
= &proc_dointvec
,
3980 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3981 .procname
= "accept_ra_defrtr",
3982 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3983 .maxlen
= sizeof(int),
3985 .proc_handler
= &proc_dointvec
,
3988 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3989 .procname
= "accept_ra_pinfo",
3990 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3991 .maxlen
= sizeof(int),
3993 .proc_handler
= &proc_dointvec
,
3995 #ifdef CONFIG_IPV6_ROUTER_PREF
3997 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3998 .procname
= "accept_ra_rtr_pref",
3999 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4000 .maxlen
= sizeof(int),
4002 .proc_handler
= &proc_dointvec
,
4005 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4006 .procname
= "router_probe_interval",
4007 .data
= &ipv6_devconf
.rtr_probe_interval
,
4008 .maxlen
= sizeof(int),
4010 .proc_handler
= &proc_dointvec_jiffies
,
4011 .strategy
= &sysctl_jiffies
,
4013 #ifdef CONFIG_IPV6_ROUTE_INFO
4015 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4016 .procname
= "accept_ra_rt_info_max_plen",
4017 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4018 .maxlen
= sizeof(int),
4020 .proc_handler
= &proc_dointvec
,
4025 .ctl_name
= NET_IPV6_PROXY_NDP
,
4026 .procname
= "proxy_ndp",
4027 .data
= &ipv6_devconf
.proxy_ndp
,
4028 .maxlen
= sizeof(int),
4030 .proc_handler
= &proc_dointvec
,
4033 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4034 .procname
= "accept_source_route",
4035 .data
= &ipv6_devconf
.accept_source_route
,
4036 .maxlen
= sizeof(int),
4038 .proc_handler
= &proc_dointvec
,
4040 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4042 .ctl_name
= CTL_UNNUMBERED
,
4043 .procname
= "optimistic_dad",
4044 .data
= &ipv6_devconf
.optimistic_dad
,
4045 .maxlen
= sizeof(int),
4047 .proc_handler
= &proc_dointvec
,
4052 .ctl_name
= 0, /* sentinel */
4057 .ctl_name
= NET_PROTO_CONF_ALL
,
4060 .child
= addrconf_sysctl
.addrconf_vars
,
4063 .ctl_name
= 0, /* sentinel */
4066 .addrconf_conf_dir
= {
4068 .ctl_name
= NET_IPV6_CONF
,
4071 .child
= addrconf_sysctl
.addrconf_dev
,
4074 .ctl_name
= 0, /* sentinel */
4077 .addrconf_proto_dir
= {
4079 .ctl_name
= NET_IPV6
,
4082 .child
= addrconf_sysctl
.addrconf_conf_dir
,
4085 .ctl_name
= 0, /* sentinel */
4088 .addrconf_root_dir
= {
4090 .ctl_name
= CTL_NET
,
4093 .child
= addrconf_sysctl
.addrconf_proto_dir
,
4096 .ctl_name
= 0, /* sentinel */
4101 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4104 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
4105 struct addrconf_sysctl_table
*t
;
4106 char *dev_name
= NULL
;
4108 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4111 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4112 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4113 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4116 dev_name
= dev
->name
;
4117 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
4119 dev_name
= "default";
4120 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
4124 * Make a copy of dev_name, because '.procname' is regarded as const
4125 * by sysctl and we wouldn't want anyone to change it under our feet
4126 * (see SIOCSIFNAME).
4128 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4132 t
->addrconf_dev
[0].procname
= dev_name
;
4134 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
4135 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
4136 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
4137 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
4139 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
4140 if (t
->sysctl_header
== NULL
)
4155 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4158 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4160 unregister_sysctl_table(t
->sysctl_header
);
4161 kfree(t
->addrconf_dev
[0].procname
);
4173 int register_inet6addr_notifier(struct notifier_block
*nb
)
4175 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4178 EXPORT_SYMBOL(register_inet6addr_notifier
);
4180 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4182 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4185 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4188 * Init / cleanup code
4191 int __init
addrconf_init(void)
4195 if ((err
= ipv6_addr_label_init()) < 0) {
4196 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4201 /* The addrconf netdev notifier requires that loopback_dev
4202 * has it's ipv6 private information allocated and setup
4203 * before it can bring up and give link-local addresses
4204 * to other devices which are up.
4206 * Unfortunately, loopback_dev is not necessarily the first
4207 * entry in the global dev_base list of net devices. In fact,
4208 * it is likely to be the very last entry on that list.
4209 * So this causes the notifier registry below to try and
4210 * give link-local addresses to all devices besides loopback_dev
4211 * first, then loopback_dev, which cases all the non-loopback_dev
4212 * devices to fail to get a link-local address.
4214 * So, as a temporary fix, allocate the ipv6 structure for
4215 * loopback_dev first by hand.
4216 * Longer term, all of the dependencies ipv6 has upon the loopback
4217 * device and it being up should be removed.
4220 if (!ipv6_add_dev(init_net
.loopback_dev
))
4226 ip6_null_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4227 ip6_null_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4228 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4229 ip6_prohibit_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4230 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4231 ip6_blk_hole_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4232 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4235 register_netdevice_notifier(&ipv6_dev_notf
);
4239 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4243 /* Only the first call to __rtnl_register can fail */
4244 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4245 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4246 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4247 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4248 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4250 ipv6_addr_label_rtnl_register();
4252 #ifdef CONFIG_SYSCTL
4253 addrconf_sysctl
.sysctl_header
=
4254 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4255 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4260 unregister_netdevice_notifier(&ipv6_dev_notf
);
4265 void __exit
addrconf_cleanup(void)
4267 struct net_device
*dev
;
4268 struct inet6_ifaddr
*ifa
;
4271 unregister_netdevice_notifier(&ipv6_dev_notf
);
4273 #ifdef CONFIG_SYSCTL
4274 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4275 addrconf_sysctl_unregister(&ipv6_devconf
);
4284 for_each_netdev(&init_net
, dev
) {
4285 if (__in6_dev_get(dev
) == NULL
)
4287 addrconf_ifdown(dev
, 1);
4289 addrconf_ifdown(init_net
.loopback_dev
, 2);
4295 write_lock_bh(&addrconf_hash_lock
);
4296 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4297 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4298 struct inet6_ifaddr
*bifa
;
4301 ifa
= ifa
->lst_next
;
4302 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4303 /* Do not free it; something is wrong.
4304 Now we can investigate it with debugger.
4308 write_unlock_bh(&addrconf_hash_lock
);
4310 del_timer(&addr_chk_timer
);