2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/config.h>
44 #include <linux/errno.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/sched.h>
49 #include <linux/net.h>
50 #include <linux/in6.h>
51 #include <linux/netdevice.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
59 #include <linux/sysctl.h>
61 #include <linux/capability.h>
62 #include <linux/delay.h>
63 #include <linux/notifier.h>
64 #include <linux/string.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
83 #include <asm/uaccess.h>
85 #include <linux/proc_fs.h>
86 #include <linux/seq_file.h>
88 /* Set to 3 to get tracing... */
92 #define ADBG(x) printk x
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
98 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
102 static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
105 #ifdef CONFIG_IPV6_PRIVACY
106 static int __ipv6_regen_rndid(struct inet6_dev *idev);
107 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
108 static void ipv6_regen_rndid(unsigned long data);
110 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
113 static int ipv6_count_addresses(struct inet6_dev *idev);
116 * Configured unicast address hash table
118 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
119 static DEFINE_RWLOCK(addrconf_hash_lock);
121 /* Protects inet6 devices */
122 DEFINE_RWLOCK(addrconf_lock);
124 static void addrconf_verify(unsigned long);
126 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
127 static DEFINE_SPINLOCK(addrconf_verify_lock);
129 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
130 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
132 static int addrconf_ifdown(struct net_device *dev, int how);
134 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
135 static void addrconf_dad_timer(unsigned long data);
136 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
137 static void addrconf_dad_run(struct inet6_dev *idev);
138 static void addrconf_rs_timer(unsigned long data);
139 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
142 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
143 struct prefix_info *pinfo);
144 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
146 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
148 struct ipv6_devconf ipv6_devconf = {
150 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
151 .mtu6 = IPV6_MIN_MTU,
153 .accept_redirects = 1,
155 .force_mld_version = 0,
157 .rtr_solicits = MAX_RTR_SOLICITATIONS,
158 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
159 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
160 #ifdef CONFIG_IPV6_PRIVACY
162 .temp_valid_lft = TEMP_VALID_LIFETIME,
163 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
164 .regen_max_retry = REGEN_MAX_RETRY,
165 .max_desync_factor = MAX_DESYNC_FACTOR,
167 .max_addresses = IPV6_MAX_ADDRESSES,
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,
179 static struct ipv6_devconf ipv6_devconf_dflt = {
181 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
182 .mtu6 = IPV6_MIN_MTU,
184 .accept_redirects = 1,
187 .rtr_solicits = MAX_RTR_SOLICITATIONS,
188 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
189 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
190 #ifdef CONFIG_IPV6_PRIVACY
192 .temp_valid_lft = TEMP_VALID_LIFETIME,
193 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
194 .regen_max_retry = REGEN_MAX_RETRY,
195 .max_desync_factor = MAX_DESYNC_FACTOR,
197 .max_addresses = IPV6_MAX_ADDRESSES,
198 .accept_ra_defrtr = 1,
199 .accept_ra_pinfo = 1,
200 #ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref = 1,
202 .rtr_probe_interval = 60 * HZ,
203 #ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen = 0,
209 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
211 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
213 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
215 #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
217 static inline unsigned ipv6_addr_scope2type(unsigned scope)
220 case IPV6_ADDR_SCOPE_NODELOCAL:
221 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
223 case IPV6_ADDR_SCOPE_LINKLOCAL:
224 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
225 IPV6_ADDR_LINKLOCAL);
226 case IPV6_ADDR_SCOPE_SITELOCAL:
227 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
228 IPV6_ADDR_SITELOCAL);
230 return IPV6_ADDR_SCOPE_TYPE(scope);
233 int __ipv6_addr_type(const struct in6_addr *addr)
237 st = addr->s6_addr32[0];
239 /* Consider all addresses with the first three bits different of
240 000 and 111 as unicasts.
242 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
243 (st & htonl(0xE0000000)) != htonl(0xE0000000))
244 return (IPV6_ADDR_UNICAST |
245 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
247 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
249 /* addr-select 3.1 */
250 return (IPV6_ADDR_MULTICAST |
251 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
254 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
255 return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
256 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
257 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
258 return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
259 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
261 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
262 if (addr->s6_addr32[2] == 0) {
263 if (addr->s6_addr32[3] == 0)
264 return IPV6_ADDR_ANY;
266 if (addr->s6_addr32[3] == htonl(0x00000001))
267 return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
268 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
270 return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
271 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
274 if (addr->s6_addr32[2] == htonl(0x0000ffff))
275 return (IPV6_ADDR_MAPPED |
276 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
279 return (IPV6_ADDR_RESERVED |
280 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
283 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
285 if (del_timer(&ifp->timer))
289 enum addrconf_timer_t
296 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
297 enum addrconf_timer_t what,
300 if (!del_timer(&ifp->timer))
305 ifp->timer.function = addrconf_dad_timer;
308 ifp->timer.function = addrconf_rs_timer;
312 ifp->timer.expires = jiffies + when;
313 add_timer(&ifp->timer);
316 /* Nobody refers to this device, we may destroy it. */
318 void in6_dev_finish_destroy(struct inet6_dev *idev)
320 struct net_device *dev = idev->dev;
321 BUG_TRAP(idev->addr_list==NULL);
322 BUG_TRAP(idev->mc_list==NULL);
323 #ifdef NET_REFCNT_DEBUG
324 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
328 printk("Freeing alive inet6 device %p\n", idev);
331 snmp6_free_dev(idev);
335 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
337 struct inet6_dev *ndev;
341 if (dev->mtu < IPV6_MIN_MTU)
344 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
349 rwlock_init(&ndev->lock);
351 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
352 ndev->cnf.mtu6 = dev->mtu;
353 ndev->cnf.sysctl = NULL;
354 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
355 if (ndev->nd_parms == NULL) {
359 /* We refer to the device */
362 if (snmp6_alloc_dev(ndev) < 0) {
364 "%s(): cannot allocate memory for statistics; dev=%s.\n",
365 __FUNCTION__, dev->name));
366 neigh_parms_release(&nd_tbl, ndev->nd_parms);
368 in6_dev_finish_destroy(ndev);
372 if (snmp6_register_dev(ndev) < 0) {
374 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
375 __FUNCTION__, dev->name));
376 neigh_parms_release(&nd_tbl, ndev->nd_parms);
378 in6_dev_finish_destroy(ndev);
382 /* One reference from device. We must do this before
383 * we invoke __ipv6_regen_rndid().
387 #ifdef CONFIG_IPV6_PRIVACY
388 init_timer(&ndev->regen_timer);
389 ndev->regen_timer.function = ipv6_regen_rndid;
390 ndev->regen_timer.data = (unsigned long) ndev;
391 if ((dev->flags&IFF_LOOPBACK) ||
392 dev->type == ARPHRD_TUNNEL ||
393 dev->type == ARPHRD_NONE ||
394 dev->type == ARPHRD_SIT) {
396 "%s: Disabled Privacy Extensions\n",
398 ndev->cnf.use_tempaddr = -1;
401 ipv6_regen_rndid((unsigned long) ndev);
405 if (netif_carrier_ok(dev))
406 ndev->if_flags |= IF_READY;
408 write_lock_bh(&addrconf_lock);
410 write_unlock_bh(&addrconf_lock);
412 ipv6_mc_init_dev(ndev);
413 ndev->tstamp = jiffies;
415 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
416 NET_IPV6_NEIGH, "ipv6",
417 &ndisc_ifinfo_sysctl_change,
419 addrconf_sysctl_register(ndev, &ndev->cnf);
424 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
426 struct inet6_dev *idev;
430 if ((idev = __in6_dev_get(dev)) == NULL) {
431 if ((idev = ipv6_add_dev(dev)) == NULL)
435 if (dev->flags&IFF_UP)
441 static void dev_forward_change(struct inet6_dev *idev)
443 struct net_device *dev;
444 struct inet6_ifaddr *ifa;
445 struct in6_addr addr;
450 if (dev && (dev->flags & IFF_MULTICAST)) {
451 ipv6_addr_all_routers(&addr);
453 if (idev->cnf.forwarding)
454 ipv6_dev_mc_inc(dev, &addr);
456 ipv6_dev_mc_dec(dev, &addr);
458 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
459 if (idev->cnf.forwarding)
460 addrconf_join_anycast(ifa);
462 addrconf_leave_anycast(ifa);
467 static void addrconf_forward_change(void)
469 struct net_device *dev;
470 struct inet6_dev *idev;
472 read_lock(&dev_base_lock);
473 for (dev=dev_base; dev; dev=dev->next) {
474 read_lock(&addrconf_lock);
475 idev = __in6_dev_get(dev);
477 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
478 idev->cnf.forwarding = ipv6_devconf.forwarding;
480 dev_forward_change(idev);
482 read_unlock(&addrconf_lock);
484 read_unlock(&dev_base_lock);
488 /* Nobody refers to this ifaddr, destroy it */
490 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
492 BUG_TRAP(ifp->if_next==NULL);
493 BUG_TRAP(ifp->lst_next==NULL);
494 #ifdef NET_REFCNT_DEBUG
495 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
498 in6_dev_put(ifp->idev);
500 if (del_timer(&ifp->timer))
501 printk("Timer is still running, when freeing ifa=%p\n", ifp);
504 printk("Freeing alive inet6 address %p\n", ifp);
507 dst_release(&ifp->rt->u.dst);
512 /* On success it returns ifp with increased reference count */
514 static struct inet6_ifaddr *
515 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
516 int scope, u32 flags)
518 struct inet6_ifaddr *ifa = NULL;
523 read_lock_bh(&addrconf_lock);
525 err = -ENODEV; /*XXX*/
529 write_lock(&addrconf_hash_lock);
531 /* Ignore adding duplicate addresses on an interface */
532 if (ipv6_chk_same_addr(addr, idev->dev)) {
533 ADBG(("ipv6_add_addr: already assigned\n"));
538 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
541 ADBG(("ipv6_add_addr: malloc failed\n"));
546 rt = addrconf_dst_alloc(idev, addr, 0);
552 ipv6_addr_copy(&ifa->addr, addr);
554 spin_lock_init(&ifa->lock);
555 init_timer(&ifa->timer);
556 ifa->timer.data = (unsigned long) ifa;
558 ifa->prefix_len = pfxlen;
559 ifa->flags = flags | IFA_F_TENTATIVE;
560 ifa->cstamp = ifa->tstamp = jiffies;
567 /* Add to big hash table */
568 hash = ipv6_addr_hash(addr);
570 ifa->lst_next = inet6_addr_lst[hash];
571 inet6_addr_lst[hash] = ifa;
573 write_unlock(&addrconf_hash_lock);
575 write_lock(&idev->lock);
576 /* Add to inet6_dev unicast addr list. */
577 ifa->if_next = idev->addr_list;
578 idev->addr_list = ifa;
580 #ifdef CONFIG_IPV6_PRIVACY
581 if (ifa->flags&IFA_F_TEMPORARY) {
582 ifa->tmp_next = idev->tempaddr_list;
583 idev->tempaddr_list = ifa;
591 write_unlock(&idev->lock);
593 read_unlock_bh(&addrconf_lock);
595 if (likely(err == 0))
596 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
604 write_unlock(&addrconf_hash_lock);
608 /* This function wants to get referenced ifp and releases it before return */
610 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
612 struct inet6_ifaddr *ifa, **ifap;
613 struct inet6_dev *idev = ifp->idev;
615 int deleted = 0, onlink = 0;
616 unsigned long expires = jiffies;
618 hash = ipv6_addr_hash(&ifp->addr);
622 write_lock_bh(&addrconf_hash_lock);
623 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
624 ifap = &ifa->lst_next) {
626 *ifap = ifa->lst_next;
628 ifa->lst_next = NULL;
632 write_unlock_bh(&addrconf_hash_lock);
634 write_lock_bh(&idev->lock);
635 #ifdef CONFIG_IPV6_PRIVACY
636 if (ifp->flags&IFA_F_TEMPORARY) {
637 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
638 ifap = &ifa->tmp_next) {
640 *ifap = ifa->tmp_next;
642 in6_ifa_put(ifp->ifpub);
646 ifa->tmp_next = NULL;
653 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
655 *ifap = ifa->if_next;
658 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
662 } else if (ifp->flags & IFA_F_PERMANENT) {
663 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
665 if (ifa->flags & IFA_F_PERMANENT) {
670 unsigned long lifetime;
675 spin_lock(&ifa->lock);
676 lifetime = min_t(unsigned long,
677 ifa->valid_lft, 0x7fffffffUL/HZ);
678 if (time_before(expires,
679 ifa->tstamp + lifetime * HZ))
680 expires = ifa->tstamp + lifetime * HZ;
681 spin_unlock(&ifa->lock);
685 ifap = &ifa->if_next;
687 write_unlock_bh(&idev->lock);
689 ipv6_ifa_notify(RTM_DELADDR, ifp);
691 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
693 addrconf_del_timer(ifp);
696 * Purge or update corresponding prefix
698 * 1) we don't purge prefix here if address was not permanent.
699 * prefix is managed by its own lifetime.
700 * 2) if there're no addresses, delete prefix.
701 * 3) if there're still other permanent address(es),
702 * corresponding prefix is still permanent.
703 * 4) otherwise, update prefix lifetime to the
704 * longest valid lifetime among the corresponding
705 * addresses on the device.
706 * Note: subsequent RA will update lifetime.
710 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
711 struct in6_addr prefix;
714 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
715 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
717 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
719 ip6_del_rt(rt, NULL, NULL, NULL);
721 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
722 rt->rt6i_expires = expires;
723 rt->rt6i_flags |= RTF_EXPIRES;
726 dst_release(&rt->u.dst);
732 #ifdef CONFIG_IPV6_PRIVACY
733 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
735 struct inet6_dev *idev = ifp->idev;
736 struct in6_addr addr, *tmpaddr;
737 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
742 write_lock(&idev->lock);
744 spin_lock_bh(&ift->lock);
745 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
746 spin_unlock_bh(&ift->lock);
753 if (idev->cnf.use_tempaddr <= 0) {
754 write_unlock(&idev->lock);
756 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
761 spin_lock_bh(&ifp->lock);
762 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
763 idev->cnf.use_tempaddr = -1; /*XXX*/
764 spin_unlock_bh(&ifp->lock);
765 write_unlock(&idev->lock);
767 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
773 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
774 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
775 spin_unlock_bh(&ifp->lock);
776 write_unlock(&idev->lock);
778 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
784 memcpy(&addr.s6_addr[8], idev->rndid, 8);
785 tmp_valid_lft = min_t(__u32,
787 idev->cnf.temp_valid_lft);
788 tmp_prefered_lft = min_t(__u32,
790 idev->cnf.temp_prefered_lft - desync_factor / HZ);
791 tmp_plen = ifp->prefix_len;
792 max_addresses = idev->cnf.max_addresses;
793 tmp_cstamp = ifp->cstamp;
794 tmp_tstamp = ifp->tstamp;
795 spin_unlock_bh(&ifp->lock);
797 write_unlock(&idev->lock);
798 ift = !max_addresses ||
799 ipv6_count_addresses(idev) < max_addresses ?
800 ipv6_add_addr(idev, &addr, tmp_plen,
801 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
802 if (!ift || IS_ERR(ift)) {
806 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
808 write_lock(&idev->lock);
812 spin_lock_bh(&ift->lock);
814 ift->valid_lft = tmp_valid_lft;
815 ift->prefered_lft = tmp_prefered_lft;
816 ift->cstamp = tmp_cstamp;
817 ift->tstamp = tmp_tstamp;
818 spin_unlock_bh(&ift->lock);
820 addrconf_dad_start(ift, 0);
829 * Choose an appropriate source address (RFC3484)
831 struct ipv6_saddr_score {
839 #define IPV6_SADDR_SCORE_LOCAL 0x0001
840 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
841 #define IPV6_SADDR_SCORE_HOA 0x0008
842 #define IPV6_SADDR_SCORE_OIF 0x0010
843 #define IPV6_SADDR_SCORE_LABEL 0x0020
844 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
846 static int inline ipv6_saddr_preferred(int type)
848 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
849 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
854 /* static matching label */
855 static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
858 * prefix (longest match) label
859 * -----------------------------
868 if (type & IPV6_ADDR_LOOPBACK)
870 else if (type & IPV6_ADDR_COMPATv4)
872 else if (type & IPV6_ADDR_MAPPED)
874 else if (addr->s6_addr32[0] == htonl(0x20010000))
876 else if (addr->s6_addr16[0] == htons(0x2002))
878 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
883 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
884 struct in6_addr *daddr, struct in6_addr *saddr)
886 struct ipv6_saddr_score hiscore;
887 struct inet6_ifaddr *ifa_result = NULL;
888 int daddr_type = __ipv6_addr_type(daddr);
889 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
890 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
891 struct net_device *dev;
893 memset(&hiscore, 0, sizeof(hiscore));
895 read_lock(&dev_base_lock);
896 read_lock(&addrconf_lock);
898 for (dev = dev_base; dev; dev=dev->next) {
899 struct inet6_dev *idev;
900 struct inet6_ifaddr *ifa;
902 /* Rule 0: Candidate Source Address (section 4)
903 * - multicast and link-local destination address,
904 * the set of candidate source address MUST only
905 * include addresses assigned to interfaces
906 * belonging to the same link as the outgoing
908 * (- For site-local destination addresses, the
909 * set of candidate source addresses MUST only
910 * include addresses assigned to interfaces
911 * belonging to the same site as the outgoing
914 if ((daddr_type & IPV6_ADDR_MULTICAST ||
915 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
916 daddr_dev && dev != daddr_dev)
919 idev = __in6_dev_get(dev);
923 read_lock_bh(&idev->lock);
924 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
925 struct ipv6_saddr_score score;
927 score.addr_type = __ipv6_addr_type(&ifa->addr);
930 * - Tentative Address (RFC2462 section 5.4)
931 * - A tentative address is not considered
932 * "assigned to an interface" in the traditional
934 * - Candidate Source Address (section 4)
935 * - In any case, anycast addresses, multicast
936 * addresses, and the unspecified address MUST
937 * NOT be included in a candidate set.
939 if (ifa->flags & IFA_F_TENTATIVE)
941 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
942 score.addr_type & IPV6_ADDR_MULTICAST)) {
943 LIMIT_NETDEBUG(KERN_DEBUG
944 "ADDRCONF: unspecified / multicast address"
945 "assigned as unicast address on %s",
955 if (ifa_result == NULL) {
956 /* record it if the first available entry */
960 /* Rule 1: Prefer same address */
961 if (hiscore.rule < 1) {
962 if (ipv6_addr_equal(&ifa_result->addr, daddr))
963 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
966 if (ipv6_addr_equal(&ifa->addr, daddr)) {
967 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
968 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
973 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
977 /* Rule 2: Prefer appropriate scope */
978 if (hiscore.rule < 2) {
979 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
982 score.scope = __ipv6_addr_src_scope(score.addr_type);
983 if (hiscore.scope < score.scope) {
984 if (hiscore.scope < daddr_scope) {
989 } else if (score.scope < hiscore.scope) {
990 if (score.scope < daddr_scope)
998 /* Rule 3: Avoid deprecated address */
999 if (hiscore.rule < 3) {
1000 if (ipv6_saddr_preferred(hiscore.addr_type) ||
1001 !(ifa_result->flags & IFA_F_DEPRECATED))
1002 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1005 if (ipv6_saddr_preferred(score.addr_type) ||
1006 !(ifa->flags & IFA_F_DEPRECATED)) {
1007 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1008 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1013 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1017 /* Rule 4: Prefer home address -- not implemented yet */
1018 if (hiscore.rule < 4)
1021 /* Rule 5: Prefer outgoing interface */
1022 if (hiscore.rule < 5) {
1023 if (daddr_dev == NULL ||
1024 daddr_dev == ifa_result->idev->dev)
1025 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1028 if (daddr_dev == NULL ||
1029 daddr_dev == ifa->idev->dev) {
1030 score.attrs |= IPV6_SADDR_SCORE_OIF;
1031 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1036 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1040 /* Rule 6: Prefer matching label */
1041 if (hiscore.rule < 6) {
1042 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1043 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1046 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1047 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1048 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1053 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1057 #ifdef CONFIG_IPV6_PRIVACY
1058 /* Rule 7: Prefer public address
1059 * Note: prefer temprary address if use_tempaddr >= 2
1061 if (hiscore.rule < 7) {
1062 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1063 (ifa_result->idev->cnf.use_tempaddr >= 2))
1064 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1067 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1068 (ifa->idev->cnf.use_tempaddr >= 2)) {
1069 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1070 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1075 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1079 /* Rule 8: Use longest matching prefix */
1080 if (hiscore.rule < 8) {
1081 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1084 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1085 if (score.matchlen > hiscore.matchlen) {
1090 else if (score.matchlen < hiscore.matchlen)
1094 /* Final Rule: choose first available one */
1098 in6_ifa_put(ifa_result);
1103 read_unlock_bh(&idev->lock);
1105 read_unlock(&addrconf_lock);
1106 read_unlock(&dev_base_lock);
1109 return -EADDRNOTAVAIL;
1111 ipv6_addr_copy(saddr, &ifa_result->addr);
1112 in6_ifa_put(ifa_result);
1117 int ipv6_get_saddr(struct dst_entry *dst,
1118 struct in6_addr *daddr, struct in6_addr *saddr)
1120 return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
1124 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1126 struct inet6_dev *idev;
1127 int err = -EADDRNOTAVAIL;
1129 read_lock(&addrconf_lock);
1130 if ((idev = __in6_dev_get(dev)) != NULL) {
1131 struct inet6_ifaddr *ifp;
1133 read_lock_bh(&idev->lock);
1134 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1135 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1136 ipv6_addr_copy(addr, &ifp->addr);
1141 read_unlock_bh(&idev->lock);
1143 read_unlock(&addrconf_lock);
1147 static int ipv6_count_addresses(struct inet6_dev *idev)
1150 struct inet6_ifaddr *ifp;
1152 read_lock_bh(&idev->lock);
1153 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1155 read_unlock_bh(&idev->lock);
1159 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1161 struct inet6_ifaddr * ifp;
1162 u8 hash = ipv6_addr_hash(addr);
1164 read_lock_bh(&addrconf_hash_lock);
1165 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1166 if (ipv6_addr_equal(&ifp->addr, addr) &&
1167 !(ifp->flags&IFA_F_TENTATIVE)) {
1168 if (dev == NULL || ifp->idev->dev == dev ||
1169 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1173 read_unlock_bh(&addrconf_hash_lock);
1178 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1180 struct inet6_ifaddr * ifp;
1181 u8 hash = ipv6_addr_hash(addr);
1183 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1184 if (ipv6_addr_equal(&ifp->addr, addr)) {
1185 if (dev == NULL || ifp->idev->dev == dev)
1192 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1194 struct inet6_ifaddr * ifp;
1195 u8 hash = ipv6_addr_hash(addr);
1197 read_lock_bh(&addrconf_hash_lock);
1198 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1199 if (ipv6_addr_equal(&ifp->addr, addr)) {
1200 if (dev == NULL || ifp->idev->dev == dev ||
1201 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1207 read_unlock_bh(&addrconf_hash_lock);
1212 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1214 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1215 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1216 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1217 u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1218 int sk_ipv6only = ipv6_only_sock(sk);
1219 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1220 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1221 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1223 if (!sk2_rcv_saddr && !sk_ipv6only)
1226 if (addr_type2 == IPV6_ADDR_ANY &&
1227 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1230 if (addr_type == IPV6_ADDR_ANY &&
1231 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1234 if (sk2_rcv_saddr6 &&
1235 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1238 if (addr_type == IPV6_ADDR_MAPPED &&
1240 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1246 /* Gets referenced address, destroys ifaddr */
1248 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1250 if (ifp->flags&IFA_F_PERMANENT) {
1251 spin_lock_bh(&ifp->lock);
1252 addrconf_del_timer(ifp);
1253 ifp->flags |= IFA_F_TENTATIVE;
1254 spin_unlock_bh(&ifp->lock);
1256 #ifdef CONFIG_IPV6_PRIVACY
1257 } else if (ifp->flags&IFA_F_TEMPORARY) {
1258 struct inet6_ifaddr *ifpub;
1259 spin_lock_bh(&ifp->lock);
1262 in6_ifa_hold(ifpub);
1263 spin_unlock_bh(&ifp->lock);
1264 ipv6_create_tempaddr(ifpub, ifp);
1267 spin_unlock_bh(&ifp->lock);
1275 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1277 if (net_ratelimit())
1278 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1279 addrconf_dad_stop(ifp);
1282 /* Join to solicited addr multicast group. */
1284 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1286 struct in6_addr maddr;
1288 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1291 addrconf_addr_solict_mult(addr, &maddr);
1292 ipv6_dev_mc_inc(dev, &maddr);
1295 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1297 struct in6_addr maddr;
1299 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1302 addrconf_addr_solict_mult(addr, &maddr);
1303 __ipv6_dev_mc_dec(idev, &maddr);
1306 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1308 struct in6_addr addr;
1309 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1310 if (ipv6_addr_any(&addr))
1312 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1315 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1317 struct in6_addr addr;
1318 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1319 if (ipv6_addr_any(&addr))
1321 __ipv6_dev_ac_dec(ifp->idev, &addr);
1324 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1326 if (dev->addr_len != ETH_ALEN)
1328 memcpy(eui, dev->dev_addr, 3);
1329 memcpy(eui + 5, dev->dev_addr + 3, 3);
1332 * The zSeries OSA network cards can be shared among various
1333 * OS instances, but the OSA cards have only one MAC address.
1334 * This leads to duplicate address conflicts in conjunction
1335 * with IPv6 if more than one instance uses the same card.
1337 * The driver for these cards can deliver a unique 16-bit
1338 * identifier for each instance sharing the same card. It is
1339 * placed instead of 0xFFFE in the interface identifier. The
1340 * "u" bit of the interface identifier is not inverted in this
1341 * case. Hence the resulting interface identifier has local
1342 * scope according to RFC2373.
1345 eui[3] = (dev->dev_id >> 8) & 0xFF;
1346 eui[4] = dev->dev_id & 0xFF;
1355 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1357 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1358 if (dev->addr_len != ARCNET_ALEN)
1361 eui[7] = *(u8*)dev->dev_addr;
1365 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1367 if (dev->addr_len != INFINIBAND_ALEN)
1369 memcpy(eui, dev->dev_addr + 12, 8);
1374 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1376 switch (dev->type) {
1379 case ARPHRD_IEEE802_TR:
1380 return addrconf_ifid_eui48(eui, dev);
1382 return addrconf_ifid_arcnet(eui, dev);
1383 case ARPHRD_INFINIBAND:
1384 return addrconf_ifid_infiniband(eui, dev);
1389 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1392 struct inet6_ifaddr *ifp;
1394 read_lock_bh(&idev->lock);
1395 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1396 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1397 memcpy(eui, ifp->addr.s6_addr+8, 8);
1402 read_unlock_bh(&idev->lock);
1406 #ifdef CONFIG_IPV6_PRIVACY
1407 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1408 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1411 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1412 idev->rndid[0] &= ~0x02;
1415 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1416 * check if generated address is not inappropriate
1418 * - Reserved subnet anycast (RFC 2526)
1419 * 11111101 11....11 1xxxxxxx
1420 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1421 * 00-00-5E-FE-xx-xx-xx-xx
1423 * - XXX: already assigned to an address on the device
1425 if (idev->rndid[0] == 0xfd &&
1426 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1427 (idev->rndid[7]&0x80))
1429 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1430 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1432 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1439 static void ipv6_regen_rndid(unsigned long data)
1441 struct inet6_dev *idev = (struct inet6_dev *) data;
1442 unsigned long expires;
1444 read_lock_bh(&addrconf_lock);
1445 write_lock_bh(&idev->lock);
1450 if (__ipv6_regen_rndid(idev) < 0)
1454 idev->cnf.temp_prefered_lft * HZ -
1455 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1456 if (time_before(expires, jiffies)) {
1458 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1463 if (!mod_timer(&idev->regen_timer, expires))
1467 write_unlock_bh(&idev->lock);
1468 read_unlock_bh(&addrconf_lock);
1472 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1475 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1476 ret = __ipv6_regen_rndid(idev);
1486 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1487 unsigned long expires, u32 flags)
1489 struct in6_rtmsg rtmsg;
1491 memset(&rtmsg, 0, sizeof(rtmsg));
1492 ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
1493 rtmsg.rtmsg_dst_len = plen;
1494 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1495 rtmsg.rtmsg_ifindex = dev->ifindex;
1496 rtmsg.rtmsg_info = expires;
1497 rtmsg.rtmsg_flags = RTF_UP|flags;
1498 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1500 /* Prevent useless cloning on PtP SIT.
1501 This thing is done here expecting that the whole
1502 class of non-broadcast devices need not cloning.
1504 if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
1505 rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
1507 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1510 /* Create "default" multicast route to the interface */
1512 static void addrconf_add_mroute(struct net_device *dev)
1514 struct in6_rtmsg rtmsg;
1516 memset(&rtmsg, 0, sizeof(rtmsg));
1517 ipv6_addr_set(&rtmsg.rtmsg_dst,
1518 htonl(0xFF000000), 0, 0, 0);
1519 rtmsg.rtmsg_dst_len = 8;
1520 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1521 rtmsg.rtmsg_ifindex = dev->ifindex;
1522 rtmsg.rtmsg_flags = RTF_UP;
1523 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1524 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1527 static void sit_route_add(struct net_device *dev)
1529 struct in6_rtmsg rtmsg;
1531 memset(&rtmsg, 0, sizeof(rtmsg));
1533 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1534 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1536 /* prefix length - 96 bits "::d.d.d.d" */
1537 rtmsg.rtmsg_dst_len = 96;
1538 rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
1539 rtmsg.rtmsg_ifindex = dev->ifindex;
1541 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1544 static void addrconf_add_lroute(struct net_device *dev)
1546 struct in6_addr addr;
1548 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1549 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1552 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1554 struct inet6_dev *idev;
1558 if ((idev = ipv6_find_idev(dev)) == NULL)
1561 /* Add default multicast route */
1562 addrconf_add_mroute(dev);
1564 /* Add link local route */
1565 addrconf_add_lroute(dev);
1569 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1571 struct prefix_info *pinfo;
1575 unsigned long rt_expires;
1576 struct inet6_dev *in6_dev;
1578 pinfo = (struct prefix_info *) opt;
1580 if (len < sizeof(struct prefix_info)) {
1581 ADBG(("addrconf: prefix option too short\n"));
1586 * Validation checks ([ADDRCONF], page 19)
1589 addr_type = ipv6_addr_type(&pinfo->prefix);
1591 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1594 valid_lft = ntohl(pinfo->valid);
1595 prefered_lft = ntohl(pinfo->prefered);
1597 if (prefered_lft > valid_lft) {
1598 if (net_ratelimit())
1599 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1603 in6_dev = in6_dev_get(dev);
1605 if (in6_dev == NULL) {
1606 if (net_ratelimit())
1607 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1612 * Two things going on here:
1613 * 1) Add routes for on-link prefixes
1614 * 2) Configure prefixes with the auto flag set
1617 /* Avoid arithmetic overflow. Really, we could
1618 save rt_expires in seconds, likely valid_lft,
1619 but it would require division in fib gc, that it
1622 if (valid_lft >= 0x7FFFFFFF/HZ)
1623 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1625 rt_expires = valid_lft * HZ;
1628 * We convert this (in jiffies) to clock_t later.
1629 * Avoid arithmetic overflow there as well.
1630 * Overflow can happen only if HZ < USER_HZ.
1632 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1633 rt_expires = 0x7FFFFFFF / USER_HZ;
1635 if (pinfo->onlink) {
1636 struct rt6_info *rt;
1637 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1639 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1640 if (rt->rt6i_flags&RTF_EXPIRES) {
1641 if (valid_lft == 0) {
1642 ip6_del_rt(rt, NULL, NULL, NULL);
1645 rt->rt6i_expires = jiffies + rt_expires;
1648 } else if (valid_lft) {
1649 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1650 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1653 dst_release(&rt->u.dst);
1656 /* Try to figure out our local address for this prefix */
1658 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1659 struct inet6_ifaddr * ifp;
1660 struct in6_addr addr;
1661 int create = 0, update_lft = 0;
1663 if (pinfo->prefix_len == 64) {
1664 memcpy(&addr, &pinfo->prefix, 8);
1665 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1666 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1667 in6_dev_put(in6_dev);
1672 if (net_ratelimit())
1673 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1675 in6_dev_put(in6_dev);
1680 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1682 if (ifp == NULL && valid_lft) {
1683 int max_addresses = in6_dev->cnf.max_addresses;
1685 /* Do not allow to create too much of autoconfigured
1686 * addresses; this would be too easy way to crash kernel.
1688 if (!max_addresses ||
1689 ipv6_count_addresses(in6_dev) < max_addresses)
1690 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1691 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1693 if (!ifp || IS_ERR(ifp)) {
1694 in6_dev_put(in6_dev);
1698 update_lft = create = 1;
1699 ifp->cstamp = jiffies;
1700 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1706 #ifdef CONFIG_IPV6_PRIVACY
1707 struct inet6_ifaddr *ift;
1711 /* update lifetime (RFC2462 5.5.3 e) */
1712 spin_lock(&ifp->lock);
1714 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1715 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1718 if (!update_lft && stored_lft) {
1719 if (valid_lft > MIN_VALID_LIFETIME ||
1720 valid_lft > stored_lft)
1722 else if (stored_lft <= MIN_VALID_LIFETIME) {
1723 /* valid_lft <= stored_lft is always true */
1727 valid_lft = MIN_VALID_LIFETIME;
1728 if (valid_lft < prefered_lft)
1729 prefered_lft = valid_lft;
1735 ifp->valid_lft = valid_lft;
1736 ifp->prefered_lft = prefered_lft;
1739 ifp->flags &= ~IFA_F_DEPRECATED;
1740 spin_unlock(&ifp->lock);
1742 if (!(flags&IFA_F_TENTATIVE))
1743 ipv6_ifa_notify(0, ifp);
1745 spin_unlock(&ifp->lock);
1747 #ifdef CONFIG_IPV6_PRIVACY
1748 read_lock_bh(&in6_dev->lock);
1749 /* update all temporary addresses in the list */
1750 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1752 * When adjusting the lifetimes of an existing
1753 * temporary address, only lower the lifetimes.
1754 * Implementations must not increase the
1755 * lifetimes of an existing temporary address
1756 * when processing a Prefix Information Option.
1758 spin_lock(&ift->lock);
1760 if (ift->valid_lft > valid_lft &&
1761 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1762 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1763 if (ift->prefered_lft > prefered_lft &&
1764 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1765 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1766 spin_unlock(&ift->lock);
1767 if (!(flags&IFA_F_TENTATIVE))
1768 ipv6_ifa_notify(0, ift);
1771 if (create && in6_dev->cnf.use_tempaddr > 0) {
1773 * When a new public address is created as described in [ADDRCONF],
1774 * also create a new temporary address.
1776 read_unlock_bh(&in6_dev->lock);
1777 ipv6_create_tempaddr(ifp, NULL);
1779 read_unlock_bh(&in6_dev->lock);
1786 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1787 in6_dev_put(in6_dev);
1791 * Set destination address.
1792 * Special case for SIT interfaces where we create a new "virtual"
1795 int addrconf_set_dstaddr(void __user *arg)
1797 struct in6_ifreq ireq;
1798 struct net_device *dev;
1804 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1807 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1813 if (dev->type == ARPHRD_SIT) {
1816 struct ip_tunnel_parm p;
1818 err = -EADDRNOTAVAIL;
1819 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1822 memset(&p, 0, sizeof(p));
1823 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1827 p.iph.protocol = IPPROTO_IPV6;
1829 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1831 oldfs = get_fs(); set_fs(KERNEL_DS);
1832 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1837 if ((dev = __dev_get_by_name(p.name)) == NULL)
1839 err = dev_open(dev);
1849 * Manual configuration of address on an interface
1851 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
1853 struct inet6_ifaddr *ifp;
1854 struct inet6_dev *idev;
1855 struct net_device *dev;
1860 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1863 if (!(dev->flags&IFF_UP))
1866 if ((idev = addrconf_add_dev(dev)) == NULL)
1869 scope = ipv6_addr_scope(pfx);
1871 ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
1873 addrconf_dad_start(ifp, 0);
1878 return PTR_ERR(ifp);
1881 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1883 struct inet6_ifaddr *ifp;
1884 struct inet6_dev *idev;
1885 struct net_device *dev;
1887 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1890 if ((idev = __in6_dev_get(dev)) == NULL)
1893 read_lock_bh(&idev->lock);
1894 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1895 if (ifp->prefix_len == plen &&
1896 ipv6_addr_equal(pfx, &ifp->addr)) {
1898 read_unlock_bh(&idev->lock);
1902 /* If the last address is deleted administratively,
1903 disable IPv6 on this interface.
1905 if (idev->addr_list == NULL)
1906 addrconf_ifdown(idev->dev, 1);
1910 read_unlock_bh(&idev->lock);
1911 return -EADDRNOTAVAIL;
1915 int addrconf_add_ifaddr(void __user *arg)
1917 struct in6_ifreq ireq;
1920 if (!capable(CAP_NET_ADMIN))
1923 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1927 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1932 int addrconf_del_ifaddr(void __user *arg)
1934 struct in6_ifreq ireq;
1937 if (!capable(CAP_NET_ADMIN))
1940 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1944 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1949 static void sit_add_v4_addrs(struct inet6_dev *idev)
1951 struct inet6_ifaddr * ifp;
1952 struct in6_addr addr;
1953 struct net_device *dev;
1958 memset(&addr, 0, sizeof(struct in6_addr));
1959 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1961 if (idev->dev->flags&IFF_POINTOPOINT) {
1962 addr.s6_addr32[0] = htonl(0xfe800000);
1965 scope = IPV6_ADDR_COMPATv4;
1968 if (addr.s6_addr32[3]) {
1969 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1971 spin_lock_bh(&ifp->lock);
1972 ifp->flags &= ~IFA_F_TENTATIVE;
1973 spin_unlock_bh(&ifp->lock);
1974 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1980 for (dev = dev_base; dev != NULL; dev = dev->next) {
1981 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1982 if (in_dev && (dev->flags & IFF_UP)) {
1983 struct in_ifaddr * ifa;
1987 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
1990 addr.s6_addr32[3] = ifa->ifa_local;
1992 if (ifa->ifa_scope == RT_SCOPE_LINK)
1994 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
1995 if (idev->dev->flags&IFF_POINTOPOINT)
1999 if (idev->dev->flags&IFF_POINTOPOINT)
2004 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2007 spin_lock_bh(&ifp->lock);
2008 ifp->flags &= ~IFA_F_TENTATIVE;
2009 spin_unlock_bh(&ifp->lock);
2010 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2018 static void init_loopback(struct net_device *dev)
2020 struct inet6_dev *idev;
2021 struct inet6_ifaddr * ifp;
2027 if ((idev = ipv6_find_idev(dev)) == NULL) {
2028 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2032 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2034 spin_lock_bh(&ifp->lock);
2035 ifp->flags &= ~IFA_F_TENTATIVE;
2036 spin_unlock_bh(&ifp->lock);
2037 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2042 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2044 struct inet6_ifaddr * ifp;
2046 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2048 addrconf_dad_start(ifp, 0);
2053 static void addrconf_dev_config(struct net_device *dev)
2055 struct in6_addr addr;
2056 struct inet6_dev * idev;
2060 if ((dev->type != ARPHRD_ETHER) &&
2061 (dev->type != ARPHRD_FDDI) &&
2062 (dev->type != ARPHRD_IEEE802_TR) &&
2063 (dev->type != ARPHRD_ARCNET) &&
2064 (dev->type != ARPHRD_INFINIBAND)) {
2065 /* Alas, we support only Ethernet autoconfiguration. */
2069 idev = addrconf_add_dev(dev);
2073 memset(&addr, 0, sizeof(struct in6_addr));
2074 addr.s6_addr32[0] = htonl(0xFE800000);
2076 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2077 addrconf_add_linklocal(idev, &addr);
2080 static void addrconf_sit_config(struct net_device *dev)
2082 struct inet6_dev *idev;
2087 * Configure the tunnel with one of our IPv4
2088 * addresses... we should configure all of
2089 * our v4 addrs in the tunnel
2092 if ((idev = ipv6_find_idev(dev)) == NULL) {
2093 printk(KERN_DEBUG "init sit: add_dev failed\n");
2097 sit_add_v4_addrs(idev);
2099 if (dev->flags&IFF_POINTOPOINT) {
2100 addrconf_add_mroute(dev);
2101 addrconf_add_lroute(dev);
2107 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2109 struct in6_addr lladdr;
2111 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2112 addrconf_add_linklocal(idev, &lladdr);
2118 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2120 struct net_device *link_dev;
2122 /* first try to inherit the link-local address from the link device */
2123 if (idev->dev->iflink &&
2124 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2125 if (!ipv6_inherit_linklocal(idev, link_dev))
2128 /* then try to inherit it from any device */
2129 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2130 if (!ipv6_inherit_linklocal(idev, link_dev))
2133 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2137 * Autoconfigure tunnel with a link-local address so routing protocols,
2138 * DHCPv6, MLD etc. can be run over the virtual link
2141 static void addrconf_ip6_tnl_config(struct net_device *dev)
2143 struct inet6_dev *idev;
2147 if ((idev = addrconf_add_dev(dev)) == NULL) {
2148 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2151 ip6_tnl_add_linklocal(idev);
2154 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2157 struct net_device *dev = (struct net_device *) data;
2158 struct inet6_dev *idev = __in6_dev_get(dev);
2159 int run_pending = 0;
2164 if (event == NETDEV_UP) {
2165 if (!netif_carrier_ok(dev)) {
2166 /* device is not ready yet. */
2168 "ADDRCONF(NETDEV_UP): %s: "
2169 "link is not ready\n",
2175 idev->if_flags |= IF_READY;
2177 if (!netif_carrier_ok(dev)) {
2178 /* device is still not ready. */
2183 if (idev->if_flags & IF_READY) {
2184 /* device is already configured. */
2187 idev->if_flags |= IF_READY;
2191 "ADDRCONF(NETDEV_CHANGE): %s: "
2192 "link becomes ready\n",
2200 addrconf_sit_config(dev);
2202 case ARPHRD_TUNNEL6:
2203 addrconf_ip6_tnl_config(dev);
2205 case ARPHRD_LOOPBACK:
2210 addrconf_dev_config(dev);
2215 addrconf_dad_run(idev);
2217 /* If the MTU changed during the interface down, when the
2218 interface up, the changed MTU must be reflected in the
2219 idev as well as routers.
2221 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2222 rt6_mtu_change(dev, dev->mtu);
2223 idev->cnf.mtu6 = dev->mtu;
2225 idev->tstamp = jiffies;
2226 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2227 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2228 stop IPv6 on this interface.
2230 if (dev->mtu < IPV6_MIN_MTU)
2231 addrconf_ifdown(dev, event != NETDEV_DOWN);
2235 case NETDEV_CHANGEMTU:
2236 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2237 rt6_mtu_change(dev, dev->mtu);
2238 idev->cnf.mtu6 = dev->mtu;
2242 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2245 case NETDEV_UNREGISTER:
2247 * Remove all addresses from this interface.
2249 addrconf_ifdown(dev, event != NETDEV_DOWN);
2252 case NETDEV_CHANGENAME:
2253 #ifdef CONFIG_SYSCTL
2255 addrconf_sysctl_unregister(&idev->cnf);
2256 neigh_sysctl_unregister(idev->nd_parms);
2257 neigh_sysctl_register(dev, idev->nd_parms,
2258 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2259 &ndisc_ifinfo_sysctl_change,
2261 addrconf_sysctl_register(idev, &idev->cnf);
2271 * addrconf module should be notified of a device going up
2273 static struct notifier_block ipv6_dev_notf = {
2274 .notifier_call = addrconf_notify,
2278 static int addrconf_ifdown(struct net_device *dev, int how)
2280 struct inet6_dev *idev;
2281 struct inet6_ifaddr *ifa, **bifa;
2286 if (dev == &loopback_dev && how == 1)
2290 neigh_ifdown(&nd_tbl, dev);
2292 idev = __in6_dev_get(dev);
2296 /* Step 1: remove reference to ipv6 device from parent device.
2300 write_lock_bh(&addrconf_lock);
2301 dev->ip6_ptr = NULL;
2303 write_unlock_bh(&addrconf_lock);
2305 /* Step 1.5: remove snmp6 entry */
2306 snmp6_unregister_dev(idev);
2310 /* Step 2: clear hash table */
2311 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2312 bifa = &inet6_addr_lst[i];
2314 write_lock_bh(&addrconf_hash_lock);
2315 while ((ifa = *bifa) != NULL) {
2316 if (ifa->idev == idev) {
2317 *bifa = ifa->lst_next;
2318 ifa->lst_next = NULL;
2319 addrconf_del_timer(ifa);
2323 bifa = &ifa->lst_next;
2325 write_unlock_bh(&addrconf_hash_lock);
2328 write_lock_bh(&idev->lock);
2330 /* Step 3: clear flags for stateless addrconf */
2332 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2334 /* Step 4: clear address list */
2335 #ifdef CONFIG_IPV6_PRIVACY
2336 if (how == 1 && del_timer(&idev->regen_timer))
2339 /* clear tempaddr list */
2340 while ((ifa = idev->tempaddr_list) != NULL) {
2341 idev->tempaddr_list = ifa->tmp_next;
2342 ifa->tmp_next = NULL;
2344 write_unlock_bh(&idev->lock);
2345 spin_lock_bh(&ifa->lock);
2348 in6_ifa_put(ifa->ifpub);
2351 spin_unlock_bh(&ifa->lock);
2353 write_lock_bh(&idev->lock);
2356 while ((ifa = idev->addr_list) != NULL) {
2357 idev->addr_list = ifa->if_next;
2358 ifa->if_next = NULL;
2360 addrconf_del_timer(ifa);
2361 write_unlock_bh(&idev->lock);
2363 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2366 write_lock_bh(&idev->lock);
2368 write_unlock_bh(&idev->lock);
2370 /* Step 5: Discard multicast list */
2373 ipv6_mc_destroy_dev(idev);
2377 /* Step 5: netlink notification of this interface */
2378 idev->tstamp = jiffies;
2379 inet6_ifinfo_notify(RTM_DELLINK, idev);
2381 /* Shot the device (if unregistered) */
2384 #ifdef CONFIG_SYSCTL
2385 addrconf_sysctl_unregister(&idev->cnf);
2386 neigh_sysctl_unregister(idev->nd_parms);
2388 neigh_parms_release(&nd_tbl, idev->nd_parms);
2389 neigh_ifdown(&nd_tbl, dev);
2395 static void addrconf_rs_timer(unsigned long data)
2397 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2399 if (ifp->idev->cnf.forwarding)
2402 if (ifp->idev->if_flags & IF_RA_RCVD) {
2404 * Announcement received after solicitation
2410 spin_lock(&ifp->lock);
2411 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2412 struct in6_addr all_routers;
2414 /* The wait after the last probe can be shorter */
2415 addrconf_mod_timer(ifp, AC_RS,
2416 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2417 ifp->idev->cnf.rtr_solicit_delay :
2418 ifp->idev->cnf.rtr_solicit_interval);
2419 spin_unlock(&ifp->lock);
2421 ipv6_addr_all_routers(&all_routers);
2423 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2425 spin_unlock(&ifp->lock);
2427 * Note: we do not support deprecated "all on-link"
2428 * assumption any longer.
2430 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2431 ifp->idev->dev->name);
2439 * Duplicate Address Detection
2441 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2443 unsigned long rand_num;
2444 struct inet6_dev *idev = ifp->idev;
2446 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2447 ifp->probes = idev->cnf.dad_transmits;
2448 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2451 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2453 struct inet6_dev *idev = ifp->idev;
2454 struct net_device *dev = idev->dev;
2456 addrconf_join_solict(dev, &ifp->addr);
2458 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2459 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2462 net_srandom(ifp->addr.s6_addr32[3]);
2464 read_lock_bh(&idev->lock);
2467 spin_lock_bh(&ifp->lock);
2469 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2470 !(ifp->flags&IFA_F_TENTATIVE)) {
2471 ifp->flags &= ~IFA_F_TENTATIVE;
2472 spin_unlock_bh(&ifp->lock);
2473 read_unlock_bh(&idev->lock);
2475 addrconf_dad_completed(ifp);
2479 if (!(idev->if_flags & IF_READY)) {
2480 spin_unlock_bh(&ifp->lock);
2481 read_unlock_bh(&idev->lock);
2483 * If the defice is not ready:
2484 * - keep it tentative if it is a permanent address.
2485 * - otherwise, kill it.
2488 addrconf_dad_stop(ifp);
2491 addrconf_dad_kick(ifp);
2492 spin_unlock_bh(&ifp->lock);
2494 read_unlock_bh(&idev->lock);
2497 static void addrconf_dad_timer(unsigned long data)
2499 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2500 struct inet6_dev *idev = ifp->idev;
2501 struct in6_addr unspec;
2502 struct in6_addr mcaddr;
2504 read_lock_bh(&idev->lock);
2506 read_unlock_bh(&idev->lock);
2509 spin_lock_bh(&ifp->lock);
2510 if (ifp->probes == 0) {
2512 * DAD was successful
2515 ifp->flags &= ~IFA_F_TENTATIVE;
2516 spin_unlock_bh(&ifp->lock);
2517 read_unlock_bh(&idev->lock);
2519 addrconf_dad_completed(ifp);
2525 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2526 spin_unlock_bh(&ifp->lock);
2527 read_unlock_bh(&idev->lock);
2529 /* send a neighbour solicitation for our addr */
2530 memset(&unspec, 0, sizeof(unspec));
2531 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2532 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2537 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2539 struct net_device * dev = ifp->idev->dev;
2542 * Configure the address for reception. Now it is valid.
2545 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2547 /* If added prefix is link local and forwarding is off,
2548 start sending router solicitations.
2551 if (ifp->idev->cnf.forwarding == 0 &&
2552 ifp->idev->cnf.rtr_solicits > 0 &&
2553 (dev->flags&IFF_LOOPBACK) == 0 &&
2554 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2555 struct in6_addr all_routers;
2557 ipv6_addr_all_routers(&all_routers);
2560 * If a host as already performed a random delay
2561 * [...] as part of DAD [...] there is no need
2562 * to delay again before sending the first RS
2564 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2566 spin_lock_bh(&ifp->lock);
2568 ifp->idev->if_flags |= IF_RS_SENT;
2569 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2570 spin_unlock_bh(&ifp->lock);
2574 static void addrconf_dad_run(struct inet6_dev *idev) {
2575 struct inet6_ifaddr *ifp;
2577 read_lock_bh(&idev->lock);
2578 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2579 spin_lock_bh(&ifp->lock);
2580 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2581 spin_unlock_bh(&ifp->lock);
2584 spin_unlock_bh(&ifp->lock);
2585 addrconf_dad_kick(ifp);
2587 read_unlock_bh(&idev->lock);
2590 #ifdef CONFIG_PROC_FS
2591 struct if6_iter_state {
2595 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2597 struct inet6_ifaddr *ifa = NULL;
2598 struct if6_iter_state *state = seq->private;
2600 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2601 ifa = inet6_addr_lst[state->bucket];
2608 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2610 struct if6_iter_state *state = seq->private;
2612 ifa = ifa->lst_next;
2614 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2615 ifa = inet6_addr_lst[state->bucket];
2621 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2623 struct inet6_ifaddr *ifa = if6_get_first(seq);
2626 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2628 return pos ? NULL : ifa;
2631 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2633 read_lock_bh(&addrconf_hash_lock);
2634 return if6_get_idx(seq, *pos);
2637 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2639 struct inet6_ifaddr *ifa;
2641 ifa = if6_get_next(seq, v);
2646 static void if6_seq_stop(struct seq_file *seq, void *v)
2648 read_unlock_bh(&addrconf_hash_lock);
2651 static int if6_seq_show(struct seq_file *seq, void *v)
2653 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2655 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2657 ifp->idev->dev->ifindex,
2661 ifp->idev->dev->name);
2665 static struct seq_operations if6_seq_ops = {
2666 .start = if6_seq_start,
2667 .next = if6_seq_next,
2668 .show = if6_seq_show,
2669 .stop = if6_seq_stop,
2672 static int if6_seq_open(struct inode *inode, struct file *file)
2674 struct seq_file *seq;
2676 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2681 rc = seq_open(file, &if6_seq_ops);
2685 seq = file->private_data;
2694 static struct file_operations if6_fops = {
2695 .owner = THIS_MODULE,
2696 .open = if6_seq_open,
2698 .llseek = seq_lseek,
2699 .release = seq_release_private,
2702 int __init if6_proc_init(void)
2704 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2709 void if6_proc_exit(void)
2711 proc_net_remove("if_inet6");
2713 #endif /* CONFIG_PROC_FS */
2716 * Periodic address status verification
2719 static void addrconf_verify(unsigned long foo)
2721 struct inet6_ifaddr *ifp;
2722 unsigned long now, next;
2725 spin_lock_bh(&addrconf_verify_lock);
2727 next = now + ADDR_CHECK_FREQUENCY;
2729 del_timer(&addr_chk_timer);
2731 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2734 read_lock(&addrconf_hash_lock);
2735 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2737 #ifdef CONFIG_IPV6_PRIVACY
2738 unsigned long regen_advance;
2741 if (ifp->flags & IFA_F_PERMANENT)
2744 spin_lock(&ifp->lock);
2745 age = (now - ifp->tstamp) / HZ;
2747 #ifdef CONFIG_IPV6_PRIVACY
2748 regen_advance = ifp->idev->cnf.regen_max_retry *
2749 ifp->idev->cnf.dad_transmits *
2750 ifp->idev->nd_parms->retrans_time / HZ;
2753 if (age >= ifp->valid_lft) {
2754 spin_unlock(&ifp->lock);
2756 read_unlock(&addrconf_hash_lock);
2759 } else if (age >= ifp->prefered_lft) {
2760 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2763 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2765 ifp->flags |= IFA_F_DEPRECATED;
2768 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2769 next = ifp->tstamp + ifp->valid_lft * HZ;
2771 spin_unlock(&ifp->lock);
2775 read_unlock(&addrconf_hash_lock);
2777 ipv6_ifa_notify(0, ifp);
2781 #ifdef CONFIG_IPV6_PRIVACY
2782 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2783 !(ifp->flags&IFA_F_TENTATIVE)) {
2784 if (age >= ifp->prefered_lft - regen_advance) {
2785 struct inet6_ifaddr *ifpub = ifp->ifpub;
2786 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2787 next = ifp->tstamp + ifp->prefered_lft * HZ;
2788 if (!ifp->regen_count && ifpub) {
2791 in6_ifa_hold(ifpub);
2792 spin_unlock(&ifp->lock);
2793 read_unlock(&addrconf_hash_lock);
2794 spin_lock(&ifpub->lock);
2795 ifpub->regen_count = 0;
2796 spin_unlock(&ifpub->lock);
2797 ipv6_create_tempaddr(ifpub, ifp);
2802 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2803 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2804 spin_unlock(&ifp->lock);
2807 /* ifp->prefered_lft <= ifp->valid_lft */
2808 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2809 next = ifp->tstamp + ifp->prefered_lft * HZ;
2810 spin_unlock(&ifp->lock);
2813 read_unlock(&addrconf_hash_lock);
2816 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2817 add_timer(&addr_chk_timer);
2818 spin_unlock_bh(&addrconf_verify_lock);
2822 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2824 struct rtattr **rta = arg;
2825 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2826 struct in6_addr *pfx;
2829 if (rta[IFA_ADDRESS-1]) {
2830 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2832 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2834 if (rta[IFA_LOCAL-1]) {
2835 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2837 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2842 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2846 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2848 struct rtattr **rta = arg;
2849 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2850 struct in6_addr *pfx;
2853 if (rta[IFA_ADDRESS-1]) {
2854 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2856 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2858 if (rta[IFA_LOCAL-1]) {
2859 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2861 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2866 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2869 /* Maximum length of ifa_cacheinfo attributes */
2870 #define INET6_IFADDR_RTA_SPACE \
2871 RTA_SPACE(16) /* IFA_ADDRESS */ + \
2872 RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */
2874 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
2875 u32 pid, u32 seq, int event, unsigned int flags)
2877 struct ifaddrmsg *ifm;
2878 struct nlmsghdr *nlh;
2879 struct ifa_cacheinfo ci;
2880 unsigned char *b = skb->tail;
2882 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
2883 ifm = NLMSG_DATA(nlh);
2884 ifm->ifa_family = AF_INET6;
2885 ifm->ifa_prefixlen = ifa->prefix_len;
2886 ifm->ifa_flags = ifa->flags;
2887 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2888 if (ifa->scope&IFA_HOST)
2889 ifm->ifa_scope = RT_SCOPE_HOST;
2890 else if (ifa->scope&IFA_LINK)
2891 ifm->ifa_scope = RT_SCOPE_LINK;
2892 else if (ifa->scope&IFA_SITE)
2893 ifm->ifa_scope = RT_SCOPE_SITE;
2894 ifm->ifa_index = ifa->idev->dev->ifindex;
2895 RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
2896 if (!(ifa->flags&IFA_F_PERMANENT)) {
2897 ci.ifa_prefered = ifa->prefered_lft;
2898 ci.ifa_valid = ifa->valid_lft;
2899 if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
2900 long tval = (jiffies - ifa->tstamp)/HZ;
2901 ci.ifa_prefered -= tval;
2902 if (ci.ifa_valid != INFINITY_LIFE_TIME)
2903 ci.ifa_valid -= tval;
2906 ci.ifa_prefered = INFINITY_LIFE_TIME;
2907 ci.ifa_valid = INFINITY_LIFE_TIME;
2909 ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
2910 + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2911 ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
2912 + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2913 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2914 nlh->nlmsg_len = skb->tail - b;
2919 skb_trim(skb, b - skb->data);
2923 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
2924 u32 pid, u32 seq, int event, u16 flags)
2926 struct ifaddrmsg *ifm;
2927 struct nlmsghdr *nlh;
2928 struct ifa_cacheinfo ci;
2929 unsigned char *b = skb->tail;
2931 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
2932 ifm = NLMSG_DATA(nlh);
2933 ifm->ifa_family = AF_INET6;
2934 ifm->ifa_prefixlen = 128;
2935 ifm->ifa_flags = IFA_F_PERMANENT;
2936 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2937 if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
2938 ifm->ifa_scope = RT_SCOPE_SITE;
2939 ifm->ifa_index = ifmca->idev->dev->ifindex;
2940 RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
2941 ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
2942 * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
2944 ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
2945 * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
2947 ci.ifa_prefered = INFINITY_LIFE_TIME;
2948 ci.ifa_valid = INFINITY_LIFE_TIME;
2949 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2950 nlh->nlmsg_len = skb->tail - b;
2955 skb_trim(skb, b - skb->data);
2959 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
2960 u32 pid, u32 seq, int event, unsigned int flags)
2962 struct ifaddrmsg *ifm;
2963 struct nlmsghdr *nlh;
2964 struct ifa_cacheinfo ci;
2965 unsigned char *b = skb->tail;
2967 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
2968 ifm = NLMSG_DATA(nlh);
2969 ifm->ifa_family = AF_INET6;
2970 ifm->ifa_prefixlen = 128;
2971 ifm->ifa_flags = IFA_F_PERMANENT;
2972 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2973 if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
2974 ifm->ifa_scope = RT_SCOPE_SITE;
2975 ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
2976 RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
2977 ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
2978 * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
2980 ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
2981 * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
2983 ci.ifa_prefered = INFINITY_LIFE_TIME;
2984 ci.ifa_valid = INFINITY_LIFE_TIME;
2985 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2986 nlh->nlmsg_len = skb->tail - b;
2991 skb_trim(skb, b - skb->data);
3002 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3003 enum addr_type_t type)
3006 int s_idx, s_ip_idx;
3008 struct net_device *dev;
3009 struct inet6_dev *idev = NULL;
3010 struct inet6_ifaddr *ifa;
3011 struct ifmcaddr6 *ifmca;
3012 struct ifacaddr6 *ifaca;
3014 s_idx = cb->args[0];
3015 s_ip_idx = ip_idx = cb->args[1];
3016 read_lock(&dev_base_lock);
3018 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3024 if ((idev = in6_dev_get(dev)) == NULL)
3026 read_lock_bh(&idev->lock);
3029 /* unicast address incl. temp addr */
3030 for (ifa = idev->addr_list; ifa;
3031 ifa = ifa->if_next, ip_idx++) {
3032 if (ip_idx < s_ip_idx)
3034 if ((err = inet6_fill_ifaddr(skb, ifa,
3035 NETLINK_CB(cb->skb).pid,
3036 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3041 case MULTICAST_ADDR:
3042 /* multicast address */
3043 for (ifmca = idev->mc_list; ifmca;
3044 ifmca = ifmca->next, ip_idx++) {
3045 if (ip_idx < s_ip_idx)
3047 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3048 NETLINK_CB(cb->skb).pid,
3049 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3055 /* anycast address */
3056 for (ifaca = idev->ac_list; ifaca;
3057 ifaca = ifaca->aca_next, ip_idx++) {
3058 if (ip_idx < s_ip_idx)
3060 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3061 NETLINK_CB(cb->skb).pid,
3062 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3070 read_unlock_bh(&idev->lock);
3075 read_unlock_bh(&idev->lock);
3078 read_unlock(&dev_base_lock);
3080 cb->args[1] = ip_idx;
3084 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3086 enum addr_type_t type = UNICAST_ADDR;
3087 return inet6_dump_addr(skb, cb, type);
3090 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3092 enum addr_type_t type = MULTICAST_ADDR;
3093 return inet6_dump_addr(skb, cb, type);
3097 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3099 enum addr_type_t type = ANYCAST_ADDR;
3100 return inet6_dump_addr(skb, cb, type);
3103 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3105 struct sk_buff *skb;
3106 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE);
3108 skb = alloc_skb(size, GFP_ATOMIC);
3110 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
3113 if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
3115 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
3118 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
3119 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
3122 static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3123 __s32 *array, int bytes)
3125 memset(array, 0, bytes);
3126 array[DEVCONF_FORWARDING] = cnf->forwarding;
3127 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3128 array[DEVCONF_MTU6] = cnf->mtu6;
3129 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3130 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3131 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3132 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3133 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3134 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3135 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3136 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3137 #ifdef CONFIG_IPV6_PRIVACY
3138 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3139 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3140 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3141 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3142 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3144 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3145 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3146 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3147 #ifdef CONFIG_IPV6_ROUTER_PREF
3148 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3149 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3150 #ifdef CONFIV_IPV6_ROUTE_INFO
3151 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3156 /* Maximum length of ifinfomsg attributes */
3157 #define INET6_IFINFO_RTA_SPACE \
3158 RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \
3159 RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \
3160 RTA_SPACE(sizeof(u32)) /* MTU */ + \
3161 RTA_SPACE(sizeof(int)) /* LINK */ + \
3162 RTA_SPACE(0) /* PROTINFO */ + \
3163 RTA_SPACE(sizeof(u32)) /* FLAGS */ + \
3164 RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \
3165 RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */
3167 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3168 u32 pid, u32 seq, int event, unsigned int flags)
3170 struct net_device *dev = idev->dev;
3171 __s32 *array = NULL;
3172 struct ifinfomsg *r;
3173 struct nlmsghdr *nlh;
3174 unsigned char *b = skb->tail;
3175 struct rtattr *subattr;
3176 __u32 mtu = dev->mtu;
3177 struct ifla_cacheinfo ci;
3179 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
3180 r = NLMSG_DATA(nlh);
3181 r->ifi_family = AF_INET6;
3183 r->ifi_type = dev->type;
3184 r->ifi_index = dev->ifindex;
3185 r->ifi_flags = dev_get_flags(dev);
3188 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
3191 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3193 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
3194 if (dev->ifindex != dev->iflink)
3195 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
3197 subattr = (struct rtattr*)skb->tail;
3199 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
3201 /* return the device flags */
3202 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
3204 /* return interface cacheinfo */
3205 ci.max_reasm_len = IPV6_MAXPLEN;
3206 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3207 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3208 ci.reachable_time = idev->nd_parms->reachable_time;
3209 ci.retrans_time = idev->nd_parms->retrans_time;
3210 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3212 /* return the device sysctl params */
3213 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
3214 goto rtattr_failure;
3215 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
3216 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
3218 /* XXX - Statistics/MC not implemented */
3219 subattr->rta_len = skb->tail - (u8*)subattr;
3221 nlh->nlmsg_len = skb->tail - b;
3228 skb_trim(skb, b - skb->data);
3232 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3235 int s_idx = cb->args[0];
3236 struct net_device *dev;
3237 struct inet6_dev *idev;
3239 read_lock(&dev_base_lock);
3240 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3243 if ((idev = in6_dev_get(dev)) == NULL)
3245 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3246 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3251 read_unlock(&dev_base_lock);
3257 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3259 struct sk_buff *skb;
3260 int size = NLMSG_SPACE(sizeof(struct ifinfomsg) + INET6_IFINFO_RTA_SPACE);
3262 skb = alloc_skb(size, GFP_ATOMIC);
3264 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
3267 if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
3269 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
3272 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
3273 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
3276 /* Maximum length of prefix_cacheinfo attributes */
3277 #define INET6_PREFIX_RTA_SPACE \
3278 RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \
3279 RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */
3281 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3282 struct prefix_info *pinfo, u32 pid, u32 seq,
3283 int event, unsigned int flags)
3285 struct prefixmsg *pmsg;
3286 struct nlmsghdr *nlh;
3287 unsigned char *b = skb->tail;
3288 struct prefix_cacheinfo ci;
3290 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
3291 pmsg = NLMSG_DATA(nlh);
3292 pmsg->prefix_family = AF_INET6;
3293 pmsg->prefix_pad1 = 0;
3294 pmsg->prefix_pad2 = 0;
3295 pmsg->prefix_ifindex = idev->dev->ifindex;
3296 pmsg->prefix_len = pinfo->prefix_len;
3297 pmsg->prefix_type = pinfo->type;
3298 pmsg->prefix_pad3 = 0;
3300 pmsg->prefix_flags = 0;
3302 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3303 if (pinfo->autoconf)
3304 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3306 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3308 ci.preferred_time = ntohl(pinfo->prefered);
3309 ci.valid_time = ntohl(pinfo->valid);
3310 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3312 nlh->nlmsg_len = skb->tail - b;
3317 skb_trim(skb, b - skb->data);
3321 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3322 struct prefix_info *pinfo)
3324 struct sk_buff *skb;
3325 int size = NLMSG_SPACE(sizeof(struct prefixmsg) + INET6_PREFIX_RTA_SPACE);
3327 skb = alloc_skb(size, GFP_ATOMIC);
3329 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
3332 if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
3334 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
3337 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
3338 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
3341 static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
3342 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3343 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3344 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3345 [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
3346 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3347 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3348 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3349 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3350 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3351 .dumpit = inet6_dump_fib, },
3354 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3356 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3360 ip6_ins_rt(ifp->rt, NULL, NULL, NULL);
3361 if (ifp->idev->cnf.forwarding)
3362 addrconf_join_anycast(ifp);
3365 if (ifp->idev->cnf.forwarding)
3366 addrconf_leave_anycast(ifp);
3367 addrconf_leave_solict(ifp->idev, &ifp->addr);
3368 dst_hold(&ifp->rt->u.dst);
3369 if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
3370 dst_free(&ifp->rt->u.dst);
3375 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3377 read_lock_bh(&addrconf_lock);
3378 if (likely(ifp->idev->dead == 0))
3379 __ipv6_ifa_notify(event, ifp);
3380 read_unlock_bh(&addrconf_lock);
3383 #ifdef CONFIG_SYSCTL
3386 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3387 void __user *buffer, size_t *lenp, loff_t *ppos)
3389 int *valp = ctl->data;
3393 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3395 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3396 if (valp != &ipv6_devconf.forwarding) {
3397 if ((!*valp) ^ (!val)) {
3398 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3401 dev_forward_change(idev);
3404 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3405 addrconf_forward_change();
3408 rt6_purge_dflt_routers();
3414 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3415 int __user *name, int nlen,
3416 void __user *oldval,
3417 size_t __user *oldlenp,
3418 void __user *newval, size_t newlen,
3421 int *valp = table->data;
3424 if (!newval || !newlen)
3426 if (newlen != sizeof(int))
3428 if (get_user(new, (int __user *)newval))
3432 if (oldval && oldlenp) {
3434 if (get_user(len, oldlenp))
3437 if (len > table->maxlen)
3438 len = table->maxlen;
3439 if (copy_to_user(oldval, valp, len))
3441 if (put_user(len, oldlenp))
3446 if (valp != &ipv6_devconf_dflt.forwarding) {
3447 if (valp != &ipv6_devconf.forwarding) {
3448 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3450 if (unlikely(idev == NULL))
3452 changed = (!*valp) ^ (!new);
3455 dev_forward_change(idev);
3458 addrconf_forward_change();
3462 rt6_purge_dflt_routers();
3469 static struct addrconf_sysctl_table
3471 struct ctl_table_header *sysctl_header;
3472 ctl_table addrconf_vars[__NET_IPV6_MAX];
3473 ctl_table addrconf_dev[2];
3474 ctl_table addrconf_conf_dir[2];
3475 ctl_table addrconf_proto_dir[2];
3476 ctl_table addrconf_root_dir[2];
3477 } addrconf_sysctl = {
3478 .sysctl_header = NULL,
3481 .ctl_name = NET_IPV6_FORWARDING,
3482 .procname = "forwarding",
3483 .data = &ipv6_devconf.forwarding,
3484 .maxlen = sizeof(int),
3486 .proc_handler = &addrconf_sysctl_forward,
3487 .strategy = &addrconf_sysctl_forward_strategy,
3490 .ctl_name = NET_IPV6_HOP_LIMIT,
3491 .procname = "hop_limit",
3492 .data = &ipv6_devconf.hop_limit,
3493 .maxlen = sizeof(int),
3495 .proc_handler = proc_dointvec,
3498 .ctl_name = NET_IPV6_MTU,
3500 .data = &ipv6_devconf.mtu6,
3501 .maxlen = sizeof(int),
3503 .proc_handler = &proc_dointvec,
3506 .ctl_name = NET_IPV6_ACCEPT_RA,
3507 .procname = "accept_ra",
3508 .data = &ipv6_devconf.accept_ra,
3509 .maxlen = sizeof(int),
3511 .proc_handler = &proc_dointvec,
3514 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3515 .procname = "accept_redirects",
3516 .data = &ipv6_devconf.accept_redirects,
3517 .maxlen = sizeof(int),
3519 .proc_handler = &proc_dointvec,
3522 .ctl_name = NET_IPV6_AUTOCONF,
3523 .procname = "autoconf",
3524 .data = &ipv6_devconf.autoconf,
3525 .maxlen = sizeof(int),
3527 .proc_handler = &proc_dointvec,
3530 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3531 .procname = "dad_transmits",
3532 .data = &ipv6_devconf.dad_transmits,
3533 .maxlen = sizeof(int),
3535 .proc_handler = &proc_dointvec,
3538 .ctl_name = NET_IPV6_RTR_SOLICITS,
3539 .procname = "router_solicitations",
3540 .data = &ipv6_devconf.rtr_solicits,
3541 .maxlen = sizeof(int),
3543 .proc_handler = &proc_dointvec,
3546 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3547 .procname = "router_solicitation_interval",
3548 .data = &ipv6_devconf.rtr_solicit_interval,
3549 .maxlen = sizeof(int),
3551 .proc_handler = &proc_dointvec_jiffies,
3552 .strategy = &sysctl_jiffies,
3555 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3556 .procname = "router_solicitation_delay",
3557 .data = &ipv6_devconf.rtr_solicit_delay,
3558 .maxlen = sizeof(int),
3560 .proc_handler = &proc_dointvec_jiffies,
3561 .strategy = &sysctl_jiffies,
3564 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3565 .procname = "force_mld_version",
3566 .data = &ipv6_devconf.force_mld_version,
3567 .maxlen = sizeof(int),
3569 .proc_handler = &proc_dointvec,
3571 #ifdef CONFIG_IPV6_PRIVACY
3573 .ctl_name = NET_IPV6_USE_TEMPADDR,
3574 .procname = "use_tempaddr",
3575 .data = &ipv6_devconf.use_tempaddr,
3576 .maxlen = sizeof(int),
3578 .proc_handler = &proc_dointvec,
3581 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3582 .procname = "temp_valid_lft",
3583 .data = &ipv6_devconf.temp_valid_lft,
3584 .maxlen = sizeof(int),
3586 .proc_handler = &proc_dointvec,
3589 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3590 .procname = "temp_prefered_lft",
3591 .data = &ipv6_devconf.temp_prefered_lft,
3592 .maxlen = sizeof(int),
3594 .proc_handler = &proc_dointvec,
3597 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3598 .procname = "regen_max_retry",
3599 .data = &ipv6_devconf.regen_max_retry,
3600 .maxlen = sizeof(int),
3602 .proc_handler = &proc_dointvec,
3605 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3606 .procname = "max_desync_factor",
3607 .data = &ipv6_devconf.max_desync_factor,
3608 .maxlen = sizeof(int),
3610 .proc_handler = &proc_dointvec,
3614 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3615 .procname = "max_addresses",
3616 .data = &ipv6_devconf.max_addresses,
3617 .maxlen = sizeof(int),
3619 .proc_handler = &proc_dointvec,
3622 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3623 .procname = "accept_ra_defrtr",
3624 .data = &ipv6_devconf.accept_ra_defrtr,
3625 .maxlen = sizeof(int),
3627 .proc_handler = &proc_dointvec,
3630 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3631 .procname = "accept_ra_pinfo",
3632 .data = &ipv6_devconf.accept_ra_pinfo,
3633 .maxlen = sizeof(int),
3635 .proc_handler = &proc_dointvec,
3637 #ifdef CONFIG_IPV6_ROUTER_PREF
3639 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3640 .procname = "accept_ra_rtr_pref",
3641 .data = &ipv6_devconf.accept_ra_rtr_pref,
3642 .maxlen = sizeof(int),
3644 .proc_handler = &proc_dointvec,
3647 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3648 .procname = "router_probe_interval",
3649 .data = &ipv6_devconf.rtr_probe_interval,
3650 .maxlen = sizeof(int),
3652 .proc_handler = &proc_dointvec_jiffies,
3653 .strategy = &sysctl_jiffies,
3655 #ifdef CONFIV_IPV6_ROUTE_INFO
3657 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3658 .procname = "accept_ra_rt_info_max_plen",
3659 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3660 .maxlen = sizeof(int),
3662 .proc_handler = &proc_dointvec,
3667 .ctl_name = 0, /* sentinel */
3672 .ctl_name = NET_PROTO_CONF_ALL,
3675 .child = addrconf_sysctl.addrconf_vars,
3678 .ctl_name = 0, /* sentinel */
3681 .addrconf_conf_dir = {
3683 .ctl_name = NET_IPV6_CONF,
3686 .child = addrconf_sysctl.addrconf_dev,
3689 .ctl_name = 0, /* sentinel */
3692 .addrconf_proto_dir = {
3694 .ctl_name = NET_IPV6,
3697 .child = addrconf_sysctl.addrconf_conf_dir,
3700 .ctl_name = 0, /* sentinel */
3703 .addrconf_root_dir = {
3705 .ctl_name = CTL_NET,
3708 .child = addrconf_sysctl.addrconf_proto_dir,
3711 .ctl_name = 0, /* sentinel */
3716 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3719 struct net_device *dev = idev ? idev->dev : NULL;
3720 struct addrconf_sysctl_table *t;
3721 char *dev_name = NULL;
3723 t = kmalloc(sizeof(*t), GFP_KERNEL);
3726 memcpy(t, &addrconf_sysctl, sizeof(*t));
3727 for (i=0; t->addrconf_vars[i].data; i++) {
3728 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3729 t->addrconf_vars[i].de = NULL;
3730 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3733 dev_name = dev->name;
3734 t->addrconf_dev[0].ctl_name = dev->ifindex;
3736 dev_name = "default";
3737 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3741 * Make a copy of dev_name, because '.procname' is regarded as const
3742 * by sysctl and we wouldn't want anyone to change it under our feet
3743 * (see SIOCSIFNAME).
3745 dev_name = kstrdup(dev_name, GFP_KERNEL);
3749 t->addrconf_dev[0].procname = dev_name;
3751 t->addrconf_dev[0].child = t->addrconf_vars;
3752 t->addrconf_dev[0].de = NULL;
3753 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3754 t->addrconf_conf_dir[0].de = NULL;
3755 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3756 t->addrconf_proto_dir[0].de = NULL;
3757 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3758 t->addrconf_root_dir[0].de = NULL;
3760 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3761 if (t->sysctl_header == NULL)
3776 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3779 struct addrconf_sysctl_table *t = p->sysctl;
3781 unregister_sysctl_table(t->sysctl_header);
3782 kfree(t->addrconf_dev[0].procname);
3794 int register_inet6addr_notifier(struct notifier_block *nb)
3796 return atomic_notifier_chain_register(&inet6addr_chain, nb);
3799 int unregister_inet6addr_notifier(struct notifier_block *nb)
3801 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
3805 * Init / cleanup code
3808 int __init addrconf_init(void)
3812 /* The addrconf netdev notifier requires that loopback_dev
3813 * has it's ipv6 private information allocated and setup
3814 * before it can bring up and give link-local addresses
3815 * to other devices which are up.
3817 * Unfortunately, loopback_dev is not necessarily the first
3818 * entry in the global dev_base list of net devices. In fact,
3819 * it is likely to be the very last entry on that list.
3820 * So this causes the notifier registry below to try and
3821 * give link-local addresses to all devices besides loopback_dev
3822 * first, then loopback_dev, which cases all the non-loopback_dev
3823 * devices to fail to get a link-local address.
3825 * So, as a temporary fix, allocate the ipv6 structure for
3826 * loopback_dev first by hand.
3827 * Longer term, all of the dependencies ipv6 has upon the loopback
3828 * device and it being up should be removed.
3831 if (!ipv6_add_dev(&loopback_dev))
3837 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
3839 register_netdevice_notifier(&ipv6_dev_notf);
3842 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3843 #ifdef CONFIG_SYSCTL
3844 addrconf_sysctl.sysctl_header =
3845 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
3846 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
3852 void __exit addrconf_cleanup(void)
3854 struct net_device *dev;
3855 struct inet6_dev *idev;
3856 struct inet6_ifaddr *ifa;
3859 unregister_netdevice_notifier(&ipv6_dev_notf);
3861 rtnetlink_links[PF_INET6] = NULL;
3862 #ifdef CONFIG_SYSCTL
3863 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
3864 addrconf_sysctl_unregister(&ipv6_devconf);
3873 for (dev=dev_base; dev; dev=dev->next) {
3874 if ((idev = __in6_dev_get(dev)) == NULL)
3876 addrconf_ifdown(dev, 1);
3878 addrconf_ifdown(&loopback_dev, 2);
3884 write_lock_bh(&addrconf_hash_lock);
3885 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3886 for (ifa=inet6_addr_lst[i]; ifa; ) {
3887 struct inet6_ifaddr *bifa;
3890 ifa = ifa->lst_next;
3891 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
3892 /* Do not free it; something is wrong.
3893 Now we can investigate it with debugger.
3897 write_unlock_bh(&addrconf_hash_lock);
3899 del_timer(&addr_chk_timer);
3903 #ifdef CONFIG_PROC_FS
3904 proc_net_remove("if_inet6");