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 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
25 * yoshfuji@USAGI : Fixed interval between DAD
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
41 #include <linux/errno.h>
42 #include <linux/types.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/net.h>
46 #include <linux/in6.h>
47 #include <linux/netdevice.h>
48 #include <linux/if_addr.h>
49 #include <linux/if_arp.h>
50 #include <linux/if_arcnet.h>
51 #include <linux/if_infiniband.h>
52 #include <linux/route.h>
53 #include <linux/inetdevice.h>
54 #include <linux/init.h>
56 #include <linux/sysctl.h>
58 #include <linux/capability.h>
59 #include <linux/delay.h>
60 #include <linux/notifier.h>
61 #include <linux/string.h>
63 #include <net/net_namespace.h>
68 #include <net/protocol.h>
69 #include <net/ndisc.h>
70 #include <net/ip6_route.h>
71 #include <net/addrconf.h>
74 #include <net/netlink.h>
75 #include <net/pkt_sched.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>
84 #include <asm/unaligned.h>
86 #include <linux/proc_fs.h>
87 #include <linux/seq_file.h>
89 /* Set to 3 to get tracing... */
93 #define ADBG(x) printk x
98 #define INFINITY_LIFE_TIME 0xFFFFFFFF
99 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102 static void addrconf_sysctl_register(struct inet6_dev *idev);
103 static void addrconf_sysctl_unregister(struct inet6_dev *idev);
105 static inline void addrconf_sysctl_register(struct inet6_dev *idev)
109 static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
114 #ifdef CONFIG_IPV6_PRIVACY
115 static int __ipv6_regen_rndid(struct inet6_dev *idev);
116 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
117 static void ipv6_regen_rndid(unsigned long data);
119 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
122 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
123 static int ipv6_count_addresses(struct inet6_dev *idev);
126 * Configured unicast address hash table
128 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
129 static DEFINE_RWLOCK(addrconf_hash_lock);
131 static void addrconf_verify(unsigned long);
133 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
134 static DEFINE_SPINLOCK(addrconf_verify_lock);
136 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
137 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139 static int addrconf_ifdown(struct net_device *dev, int how);
141 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
142 static void addrconf_dad_timer(unsigned long data);
143 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
144 static void addrconf_dad_run(struct inet6_dev *idev);
145 static void addrconf_rs_timer(unsigned long data);
146 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
147 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
149 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
150 struct prefix_info *pinfo);
151 static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
152 struct net_device *dev);
154 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
156 static struct ipv6_devconf ipv6_devconf __read_mostly = {
158 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
159 .mtu6 = IPV6_MIN_MTU,
161 .accept_redirects = 1,
163 .force_mld_version = 0,
165 .rtr_solicits = MAX_RTR_SOLICITATIONS,
166 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
167 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
168 #ifdef CONFIG_IPV6_PRIVACY
170 .temp_valid_lft = TEMP_VALID_LIFETIME,
171 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
172 .regen_max_retry = REGEN_MAX_RETRY,
173 .max_desync_factor = MAX_DESYNC_FACTOR,
175 .max_addresses = IPV6_MAX_ADDRESSES,
176 .accept_ra_defrtr = 1,
177 .accept_ra_pinfo = 1,
178 #ifdef CONFIG_IPV6_ROUTER_PREF
179 .accept_ra_rtr_pref = 1,
180 .rtr_probe_interval = 60 * HZ,
181 #ifdef CONFIG_IPV6_ROUTE_INFO
182 .accept_ra_rt_info_max_plen = 0,
186 .accept_source_route = 0, /* we do not accept RH0 by default. */
191 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
193 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
194 .mtu6 = IPV6_MIN_MTU,
196 .accept_redirects = 1,
199 .rtr_solicits = MAX_RTR_SOLICITATIONS,
200 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
201 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
202 #ifdef CONFIG_IPV6_PRIVACY
204 .temp_valid_lft = TEMP_VALID_LIFETIME,
205 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
206 .regen_max_retry = REGEN_MAX_RETRY,
207 .max_desync_factor = MAX_DESYNC_FACTOR,
209 .max_addresses = IPV6_MAX_ADDRESSES,
210 .accept_ra_defrtr = 1,
211 .accept_ra_pinfo = 1,
212 #ifdef CONFIG_IPV6_ROUTER_PREF
213 .accept_ra_rtr_pref = 1,
214 .rtr_probe_interval = 60 * HZ,
215 #ifdef CONFIG_IPV6_ROUTE_INFO
216 .accept_ra_rt_info_max_plen = 0,
220 .accept_source_route = 0, /* we do not accept RH0 by default. */
225 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
226 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
227 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
228 const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
229 const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
231 /* Check if a valid qdisc is available */
232 static inline bool addrconf_qdisc_ok(const struct net_device *dev)
234 return !qdisc_tx_is_noop(dev);
237 /* Check if a route is valid prefix route */
238 static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
240 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
243 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
245 if (del_timer(&ifp->timer))
249 enum addrconf_timer_t
256 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
257 enum addrconf_timer_t what,
260 if (!del_timer(&ifp->timer))
265 ifp->timer.function = addrconf_dad_timer;
268 ifp->timer.function = addrconf_rs_timer;
272 ifp->timer.expires = jiffies + when;
273 add_timer(&ifp->timer);
276 static int snmp6_alloc_dev(struct inet6_dev *idev)
278 if (snmp_mib_init((void **)idev->stats.ipv6,
279 sizeof(struct ipstats_mib)) < 0)
281 if (snmp_mib_init((void **)idev->stats.icmpv6,
282 sizeof(struct icmpv6_mib)) < 0)
284 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
285 sizeof(struct icmpv6msg_mib)) < 0)
291 snmp_mib_free((void **)idev->stats.icmpv6);
293 snmp_mib_free((void **)idev->stats.ipv6);
298 static void snmp6_free_dev(struct inet6_dev *idev)
300 snmp_mib_free((void **)idev->stats.icmpv6msg);
301 snmp_mib_free((void **)idev->stats.icmpv6);
302 snmp_mib_free((void **)idev->stats.ipv6);
305 /* Nobody refers to this device, we may destroy it. */
307 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
309 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
313 void in6_dev_finish_destroy(struct inet6_dev *idev)
315 struct net_device *dev = idev->dev;
317 WARN_ON(idev->addr_list != NULL);
318 WARN_ON(idev->mc_list != NULL);
320 #ifdef NET_REFCNT_DEBUG
321 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
325 printk("Freeing alive inet6 device %p\n", idev);
328 snmp6_free_dev(idev);
329 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
332 EXPORT_SYMBOL(in6_dev_finish_destroy);
334 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
336 struct inet6_dev *ndev;
340 if (dev->mtu < IPV6_MIN_MTU)
343 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
348 rwlock_init(&ndev->lock);
350 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
351 ndev->cnf.mtu6 = dev->mtu;
352 ndev->cnf.sysctl = NULL;
353 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
354 if (ndev->nd_parms == NULL) {
358 if (ndev->cnf.forwarding)
359 dev_disable_lro(dev);
360 /* We refer to the device */
363 if (snmp6_alloc_dev(ndev) < 0) {
365 "%s(): cannot allocate memory for statistics; dev=%s.\n",
366 __func__, dev->name));
367 neigh_parms_release(&nd_tbl, ndev->nd_parms);
369 in6_dev_finish_destroy(ndev);
373 if (snmp6_register_dev(ndev) < 0) {
375 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
376 __func__, dev->name));
377 neigh_parms_release(&nd_tbl, ndev->nd_parms);
379 in6_dev_finish_destroy(ndev);
383 /* One reference from device. We must do this before
384 * we invoke __ipv6_regen_rndid().
388 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
389 ndev->cnf.accept_dad = -1;
391 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
392 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
394 "%s: Disabled Multicast RS\n",
396 ndev->cnf.rtr_solicits = 0;
400 #ifdef CONFIG_IPV6_PRIVACY
401 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
402 if ((dev->flags&IFF_LOOPBACK) ||
403 dev->type == ARPHRD_TUNNEL ||
404 dev->type == ARPHRD_TUNNEL6 ||
405 dev->type == ARPHRD_SIT ||
406 dev->type == ARPHRD_NONE) {
408 "%s: Disabled Privacy Extensions\n",
410 ndev->cnf.use_tempaddr = -1;
413 ipv6_regen_rndid((unsigned long) ndev);
417 if (netif_running(dev) && addrconf_qdisc_ok(dev))
418 ndev->if_flags |= IF_READY;
420 ipv6_mc_init_dev(ndev);
421 ndev->tstamp = jiffies;
422 addrconf_sysctl_register(ndev);
423 /* protected by rtnl_lock */
424 rcu_assign_pointer(dev->ip6_ptr, ndev);
426 /* Join all-node multicast group */
427 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
432 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
434 struct inet6_dev *idev;
438 if ((idev = __in6_dev_get(dev)) == NULL) {
439 if ((idev = ipv6_add_dev(dev)) == NULL)
443 if (dev->flags&IFF_UP)
449 static void dev_forward_change(struct inet6_dev *idev)
451 struct net_device *dev;
452 struct inet6_ifaddr *ifa;
457 if (idev->cnf.forwarding)
458 dev_disable_lro(dev);
459 if (dev && (dev->flags & IFF_MULTICAST)) {
460 if (idev->cnf.forwarding)
461 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
463 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
465 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
466 if (ifa->flags&IFA_F_TENTATIVE)
468 if (idev->cnf.forwarding)
469 addrconf_join_anycast(ifa);
471 addrconf_leave_anycast(ifa);
476 static void addrconf_forward_change(struct net *net, __s32 newf)
478 struct net_device *dev;
479 struct inet6_dev *idev;
481 read_lock(&dev_base_lock);
482 for_each_netdev(net, dev) {
484 idev = __in6_dev_get(dev);
486 int changed = (!idev->cnf.forwarding) ^ (!newf);
487 idev->cnf.forwarding = newf;
489 dev_forward_change(idev);
493 read_unlock(&dev_base_lock);
496 static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
500 net = (struct net *)table->extra2;
501 if (p == &net->ipv6.devconf_dflt->forwarding)
507 if (p == &net->ipv6.devconf_all->forwarding) {
508 __s32 newf = net->ipv6.devconf_all->forwarding;
509 net->ipv6.devconf_dflt->forwarding = newf;
510 addrconf_forward_change(net, newf);
511 } else if ((!*p) ^ (!old))
512 dev_forward_change((struct inet6_dev *)table->extra1);
516 rt6_purge_dflt_routers(net);
521 /* Nobody refers to this ifaddr, destroy it */
523 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
525 WARN_ON(ifp->if_next != NULL);
526 WARN_ON(ifp->lst_next != NULL);
528 #ifdef NET_REFCNT_DEBUG
529 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
532 in6_dev_put(ifp->idev);
534 if (del_timer(&ifp->timer))
535 printk("Timer is still running, when freeing ifa=%p\n", ifp);
538 printk("Freeing alive inet6 address %p\n", ifp);
541 dst_release(&ifp->rt->u.dst);
547 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
549 struct inet6_ifaddr *ifa, **ifap;
550 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
553 * Each device address list is sorted in order of scope -
554 * global before linklocal.
556 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
557 ifap = &ifa->if_next) {
558 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
562 ifp->if_next = *ifap;
567 * Hash function taken from net_alias.c
569 static u8 ipv6_addr_hash(const struct in6_addr *addr)
574 * We perform the hash function over the last 64 bits of the address
575 * This will include the IEEE address token on links that support it.
578 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
579 word ^= (word >> 16);
582 return ((word ^ (word >> 4)) & 0x0f);
585 /* On success it returns ifp with increased reference count */
587 static struct inet6_ifaddr *
588 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
589 int scope, u32 flags)
591 struct inet6_ifaddr *ifa = NULL;
593 struct net *net = dev_net(idev->dev);
596 int addr_type = ipv6_addr_type(addr);
598 if (addr_type == IPV6_ADDR_ANY ||
599 addr_type & IPV6_ADDR_MULTICAST ||
600 (!(idev->dev->flags & IFF_LOOPBACK) &&
601 addr_type & IPV6_ADDR_LOOPBACK))
602 return ERR_PTR(-EADDRNOTAVAIL);
606 err = -ENODEV; /*XXX*/
610 if (idev->cnf.disable_ipv6 || net->ipv6.devconf_all->disable_ipv6) {
615 write_lock(&addrconf_hash_lock);
617 /* Ignore adding duplicate addresses on an interface */
618 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
619 ADBG(("ipv6_add_addr: already assigned\n"));
624 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
627 ADBG(("ipv6_add_addr: malloc failed\n"));
632 rt = addrconf_dst_alloc(idev, addr, 0);
638 ipv6_addr_copy(&ifa->addr, addr);
640 spin_lock_init(&ifa->lock);
641 init_timer(&ifa->timer);
642 ifa->timer.data = (unsigned long) ifa;
644 ifa->prefix_len = pfxlen;
645 ifa->flags = flags | IFA_F_TENTATIVE;
646 ifa->cstamp = ifa->tstamp = jiffies;
651 * part one of RFC 4429, section 3.3
652 * We should not configure an address as
653 * optimistic if we do not yet know the link
654 * layer address of our nexhop router
657 if (rt->rt6i_nexthop == NULL)
658 ifa->flags &= ~IFA_F_OPTIMISTIC;
665 /* Add to big hash table */
666 hash = ipv6_addr_hash(addr);
668 ifa->lst_next = inet6_addr_lst[hash];
669 inet6_addr_lst[hash] = ifa;
671 write_unlock(&addrconf_hash_lock);
673 write_lock(&idev->lock);
674 /* Add to inet6_dev unicast addr list. */
675 ipv6_link_dev_addr(idev, ifa);
677 #ifdef CONFIG_IPV6_PRIVACY
678 if (ifa->flags&IFA_F_TEMPORARY) {
679 ifa->tmp_next = idev->tempaddr_list;
680 idev->tempaddr_list = ifa;
686 write_unlock(&idev->lock);
688 rcu_read_unlock_bh();
690 if (likely(err == 0))
691 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
699 write_unlock(&addrconf_hash_lock);
703 /* This function wants to get referenced ifp and releases it before return */
705 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
707 struct inet6_ifaddr *ifa, **ifap;
708 struct inet6_dev *idev = ifp->idev;
710 int deleted = 0, onlink = 0;
711 unsigned long expires = jiffies;
713 hash = ipv6_addr_hash(&ifp->addr);
717 write_lock_bh(&addrconf_hash_lock);
718 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
719 ifap = &ifa->lst_next) {
721 *ifap = ifa->lst_next;
723 ifa->lst_next = NULL;
727 write_unlock_bh(&addrconf_hash_lock);
729 write_lock_bh(&idev->lock);
730 #ifdef CONFIG_IPV6_PRIVACY
731 if (ifp->flags&IFA_F_TEMPORARY) {
732 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
733 ifap = &ifa->tmp_next) {
735 *ifap = ifa->tmp_next;
737 in6_ifa_put(ifp->ifpub);
741 ifa->tmp_next = NULL;
748 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
750 *ifap = ifa->if_next;
753 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
757 } else if (ifp->flags & IFA_F_PERMANENT) {
758 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
760 if (ifa->flags & IFA_F_PERMANENT) {
765 unsigned long lifetime;
770 spin_lock(&ifa->lock);
772 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
774 * Note: Because this address is
775 * not permanent, lifetime <
776 * LONG_MAX / HZ here.
778 if (time_before(expires,
779 ifa->tstamp + lifetime * HZ))
780 expires = ifa->tstamp + lifetime * HZ;
781 spin_unlock(&ifa->lock);
785 ifap = &ifa->if_next;
787 write_unlock_bh(&idev->lock);
789 addrconf_del_timer(ifp);
791 ipv6_ifa_notify(RTM_DELADDR, ifp);
793 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
796 * Purge or update corresponding prefix
798 * 1) we don't purge prefix here if address was not permanent.
799 * prefix is managed by its own lifetime.
800 * 2) if there're no addresses, delete prefix.
801 * 3) if there're still other permanent address(es),
802 * corresponding prefix is still permanent.
803 * 4) otherwise, update prefix lifetime to the
804 * longest valid lifetime among the corresponding
805 * addresses on the device.
806 * Note: subsequent RA will update lifetime.
810 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
811 struct in6_addr prefix;
813 struct net *net = dev_net(ifp->idev->dev);
814 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
815 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
817 if (rt && addrconf_is_prefix_route(rt)) {
821 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
822 rt->rt6i_expires = expires;
823 rt->rt6i_flags |= RTF_EXPIRES;
826 dst_release(&rt->u.dst);
832 #ifdef CONFIG_IPV6_PRIVACY
833 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
835 struct inet6_dev *idev = ifp->idev;
836 struct in6_addr addr, *tmpaddr;
837 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
838 unsigned long regen_advance;
844 write_lock(&idev->lock);
846 spin_lock_bh(&ift->lock);
847 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
848 spin_unlock_bh(&ift->lock);
855 if (idev->cnf.use_tempaddr <= 0) {
856 write_unlock(&idev->lock);
858 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
863 spin_lock_bh(&ifp->lock);
864 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
865 idev->cnf.use_tempaddr = -1; /*XXX*/
866 spin_unlock_bh(&ifp->lock);
867 write_unlock(&idev->lock);
869 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
875 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
876 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
877 spin_unlock_bh(&ifp->lock);
878 write_unlock(&idev->lock);
880 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
886 memcpy(&addr.s6_addr[8], idev->rndid, 8);
887 tmp_valid_lft = min_t(__u32,
889 idev->cnf.temp_valid_lft);
890 tmp_prefered_lft = min_t(__u32,
892 idev->cnf.temp_prefered_lft - desync_factor / HZ);
893 tmp_plen = ifp->prefix_len;
894 max_addresses = idev->cnf.max_addresses;
895 tmp_cstamp = ifp->cstamp;
896 tmp_tstamp = ifp->tstamp;
897 spin_unlock_bh(&ifp->lock);
899 regen_advance = idev->cnf.regen_max_retry *
900 idev->cnf.dad_transmits *
901 idev->nd_parms->retrans_time / HZ;
902 write_unlock(&idev->lock);
904 /* A temporary address is created only if this calculated Preferred
905 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
906 * an implementation must not create a temporary address with a zero
907 * Preferred Lifetime.
909 if (tmp_prefered_lft <= regen_advance) {
916 addr_flags = IFA_F_TEMPORARY;
917 /* set in addrconf_prefix_rcv() */
918 if (ifp->flags & IFA_F_OPTIMISTIC)
919 addr_flags |= IFA_F_OPTIMISTIC;
921 ift = !max_addresses ||
922 ipv6_count_addresses(idev) < max_addresses ?
923 ipv6_add_addr(idev, &addr, tmp_plen,
924 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
926 if (!ift || IS_ERR(ift)) {
930 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
932 write_lock(&idev->lock);
936 spin_lock_bh(&ift->lock);
938 ift->valid_lft = tmp_valid_lft;
939 ift->prefered_lft = tmp_prefered_lft;
940 ift->cstamp = tmp_cstamp;
941 ift->tstamp = tmp_tstamp;
942 spin_unlock_bh(&ift->lock);
944 addrconf_dad_start(ift, 0);
953 * Choose an appropriate source address (RFC3484)
956 IPV6_SADDR_RULE_INIT = 0,
957 IPV6_SADDR_RULE_LOCAL,
958 IPV6_SADDR_RULE_SCOPE,
959 IPV6_SADDR_RULE_PREFERRED,
960 #ifdef CONFIG_IPV6_MIP6
964 IPV6_SADDR_RULE_LABEL,
965 #ifdef CONFIG_IPV6_PRIVACY
966 IPV6_SADDR_RULE_PRIVACY,
968 IPV6_SADDR_RULE_ORCHID,
969 IPV6_SADDR_RULE_PREFIX,
973 struct ipv6_saddr_score {
976 struct inet6_ifaddr *ifa;
977 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
982 struct ipv6_saddr_dst {
983 const struct in6_addr *addr;
990 static inline int ipv6_saddr_preferred(int type)
992 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
993 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
998 static int ipv6_get_saddr_eval(struct net *net,
999 struct ipv6_saddr_score *score,
1000 struct ipv6_saddr_dst *dst,
1005 if (i <= score->rule) {
1007 case IPV6_SADDR_RULE_SCOPE:
1008 ret = score->scopedist;
1010 case IPV6_SADDR_RULE_PREFIX:
1011 ret = score->matchlen;
1014 ret = !!test_bit(i, score->scorebits);
1020 case IPV6_SADDR_RULE_INIT:
1021 /* Rule 0: remember if hiscore is not ready yet */
1024 case IPV6_SADDR_RULE_LOCAL:
1025 /* Rule 1: Prefer same address */
1026 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1028 case IPV6_SADDR_RULE_SCOPE:
1029 /* Rule 2: Prefer appropriate scope
1034 * ---+--+-+---> scope
1036 * | d is scope of the destination.
1038 * | \ <- smaller scope is better if
1039 * B-15 | \ if scope is enough for destinaion.
1040 * | ret = B - scope (-1 <= scope >= d <= 15).
1042 * |/ <- greater is better
1043 * -C / if scope is not enough for destination.
1044 * /| ret = scope - C (-1 <= d < scope <= 15).
1046 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1047 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1048 * Assume B = 0 and we get C > 29.
1050 ret = __ipv6_addr_src_scope(score->addr_type);
1051 if (ret >= dst->scope)
1054 ret -= 128; /* 30 is enough */
1055 score->scopedist = ret;
1057 case IPV6_SADDR_RULE_PREFERRED:
1058 /* Rule 3: Avoid deprecated and optimistic addresses */
1059 ret = ipv6_saddr_preferred(score->addr_type) ||
1060 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1062 #ifdef CONFIG_IPV6_MIP6
1063 case IPV6_SADDR_RULE_HOA:
1065 /* Rule 4: Prefer home address */
1066 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1067 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1071 case IPV6_SADDR_RULE_OIF:
1072 /* Rule 5: Prefer outgoing interface */
1073 ret = (!dst->ifindex ||
1074 dst->ifindex == score->ifa->idev->dev->ifindex);
1076 case IPV6_SADDR_RULE_LABEL:
1077 /* Rule 6: Prefer matching label */
1078 ret = ipv6_addr_label(net,
1079 &score->ifa->addr, score->addr_type,
1080 score->ifa->idev->dev->ifindex) == dst->label;
1082 #ifdef CONFIG_IPV6_PRIVACY
1083 case IPV6_SADDR_RULE_PRIVACY:
1085 /* Rule 7: Prefer public address
1086 * Note: prefer temprary address if use_tempaddr >= 2
1088 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1089 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1090 score->ifa->idev->cnf.use_tempaddr >= 2;
1091 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1095 case IPV6_SADDR_RULE_ORCHID:
1096 /* Rule 8-: Prefer ORCHID vs ORCHID or
1097 * non-ORCHID vs non-ORCHID
1099 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1100 ipv6_addr_orchid(dst->addr));
1102 case IPV6_SADDR_RULE_PREFIX:
1103 /* Rule 8: Use longest matching prefix */
1104 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1112 __set_bit(i, score->scorebits);
1118 int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
1119 const struct in6_addr *daddr, unsigned int prefs,
1120 struct in6_addr *saddr)
1122 struct ipv6_saddr_score scores[2],
1123 *score = &scores[0], *hiscore = &scores[1];
1124 struct ipv6_saddr_dst dst;
1125 struct net_device *dev;
1128 dst_type = __ipv6_addr_type(daddr);
1130 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1131 dst.scope = __ipv6_addr_src_scope(dst_type);
1132 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
1136 hiscore->ifa = NULL;
1138 read_lock(&dev_base_lock);
1141 for_each_netdev(net, dev) {
1142 struct inet6_dev *idev;
1144 /* Candidate Source Address (section 4)
1145 * - multicast and link-local destination address,
1146 * the set of candidate source address MUST only
1147 * include addresses assigned to interfaces
1148 * belonging to the same link as the outgoing
1150 * (- For site-local destination addresses, the
1151 * set of candidate source addresses MUST only
1152 * include addresses assigned to interfaces
1153 * belonging to the same site as the outgoing
1156 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1157 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1158 dst.ifindex && dev->ifindex != dst.ifindex)
1161 idev = __in6_dev_get(dev);
1165 read_lock_bh(&idev->lock);
1166 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1170 * - Tentative Address (RFC2462 section 5.4)
1171 * - A tentative address is not considered
1172 * "assigned to an interface" in the traditional
1173 * sense, unless it is also flagged as optimistic.
1174 * - Candidate Source Address (section 4)
1175 * - In any case, anycast addresses, multicast
1176 * addresses, and the unspecified address MUST
1177 * NOT be included in a candidate set.
1179 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1180 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1183 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1185 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1186 score->addr_type & IPV6_ADDR_MULTICAST)) {
1187 LIMIT_NETDEBUG(KERN_DEBUG
1188 "ADDRCONF: unspecified / multicast address "
1189 "assigned as unicast address on %s",
1195 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1197 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1198 int minihiscore, miniscore;
1200 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1201 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
1203 if (minihiscore > miniscore) {
1204 if (i == IPV6_SADDR_RULE_SCOPE &&
1205 score->scopedist > 0) {
1208 * each remaining entry
1209 * has too small (not enough)
1210 * scope, because ifa entries
1211 * are sorted by their scope
1217 } else if (minihiscore < miniscore) {
1218 struct ipv6_saddr_score *tmp;
1221 in6_ifa_put(hiscore->ifa);
1223 in6_ifa_hold(score->ifa);
1229 /* restore our iterator */
1230 score->ifa = hiscore->ifa;
1237 read_unlock_bh(&idev->lock);
1240 read_unlock(&dev_base_lock);
1243 return -EADDRNOTAVAIL;
1245 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1246 in6_ifa_put(hiscore->ifa);
1250 EXPORT_SYMBOL(ipv6_dev_get_saddr);
1252 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1253 unsigned char banned_flags)
1255 struct inet6_dev *idev;
1256 int err = -EADDRNOTAVAIL;
1259 if ((idev = __in6_dev_get(dev)) != NULL) {
1260 struct inet6_ifaddr *ifp;
1262 read_lock_bh(&idev->lock);
1263 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1264 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1265 ipv6_addr_copy(addr, &ifp->addr);
1270 read_unlock_bh(&idev->lock);
1276 static int ipv6_count_addresses(struct inet6_dev *idev)
1279 struct inet6_ifaddr *ifp;
1281 read_lock_bh(&idev->lock);
1282 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1284 read_unlock_bh(&idev->lock);
1288 int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1289 struct net_device *dev, int strict)
1291 struct inet6_ifaddr * ifp;
1292 u8 hash = ipv6_addr_hash(addr);
1294 read_lock_bh(&addrconf_hash_lock);
1295 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1296 if (!net_eq(dev_net(ifp->idev->dev), net))
1298 if (ipv6_addr_equal(&ifp->addr, addr) &&
1299 !(ifp->flags&IFA_F_TENTATIVE)) {
1300 if (dev == NULL || ifp->idev->dev == dev ||
1301 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1305 read_unlock_bh(&addrconf_hash_lock);
1308 EXPORT_SYMBOL(ipv6_chk_addr);
1311 int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1312 struct net_device *dev)
1314 struct inet6_ifaddr * ifp;
1315 u8 hash = ipv6_addr_hash(addr);
1317 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1318 if (!net_eq(dev_net(ifp->idev->dev), net))
1320 if (ipv6_addr_equal(&ifp->addr, addr)) {
1321 if (dev == NULL || ifp->idev->dev == dev)
1328 int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1330 struct inet6_dev *idev;
1331 struct inet6_ifaddr *ifa;
1336 idev = __in6_dev_get(dev);
1338 read_lock_bh(&idev->lock);
1339 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1340 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1345 read_unlock_bh(&idev->lock);
1351 EXPORT_SYMBOL(ipv6_chk_prefix);
1353 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1354 struct net_device *dev, int strict)
1356 struct inet6_ifaddr * ifp;
1357 u8 hash = ipv6_addr_hash(addr);
1359 read_lock_bh(&addrconf_hash_lock);
1360 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1361 if (!net_eq(dev_net(ifp->idev->dev), net))
1363 if (ipv6_addr_equal(&ifp->addr, addr)) {
1364 if (dev == NULL || ifp->idev->dev == dev ||
1365 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1371 read_unlock_bh(&addrconf_hash_lock);
1376 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1378 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1379 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1380 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1381 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1382 int sk_ipv6only = ipv6_only_sock(sk);
1383 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1384 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1385 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1387 if (!sk2_rcv_saddr && !sk_ipv6only)
1390 if (addr_type2 == IPV6_ADDR_ANY &&
1391 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1394 if (addr_type == IPV6_ADDR_ANY &&
1395 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1398 if (sk2_rcv_saddr6 &&
1399 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1402 if (addr_type == IPV6_ADDR_MAPPED &&
1404 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1410 /* Gets referenced address, destroys ifaddr */
1412 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1414 if (ifp->flags&IFA_F_PERMANENT) {
1415 spin_lock_bh(&ifp->lock);
1416 addrconf_del_timer(ifp);
1417 ifp->flags |= IFA_F_TENTATIVE;
1418 spin_unlock_bh(&ifp->lock);
1420 #ifdef CONFIG_IPV6_PRIVACY
1421 } else if (ifp->flags&IFA_F_TEMPORARY) {
1422 struct inet6_ifaddr *ifpub;
1423 spin_lock_bh(&ifp->lock);
1426 in6_ifa_hold(ifpub);
1427 spin_unlock_bh(&ifp->lock);
1428 ipv6_create_tempaddr(ifpub, ifp);
1431 spin_unlock_bh(&ifp->lock);
1439 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1441 struct inet6_dev *idev = ifp->idev;
1443 if (net_ratelimit())
1444 printk(KERN_INFO "%s: IPv6 duplicate address detected!\n",
1445 ifp->idev->dev->name);
1447 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1448 struct in6_addr addr;
1450 addr.s6_addr32[0] = htonl(0xfe800000);
1451 addr.s6_addr32[1] = 0;
1453 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1454 ipv6_addr_equal(&ifp->addr, &addr)) {
1455 /* DAD failed for link-local based on MAC address */
1456 idev->cnf.disable_ipv6 = 1;
1458 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1459 ifp->idev->dev->name);
1463 addrconf_dad_stop(ifp);
1466 /* Join to solicited addr multicast group. */
1468 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1470 struct in6_addr maddr;
1472 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1475 addrconf_addr_solict_mult(addr, &maddr);
1476 ipv6_dev_mc_inc(dev, &maddr);
1479 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1481 struct in6_addr maddr;
1483 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1486 addrconf_addr_solict_mult(addr, &maddr);
1487 __ipv6_dev_mc_dec(idev, &maddr);
1490 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1492 struct in6_addr addr;
1493 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1494 if (ipv6_addr_any(&addr))
1496 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1499 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1501 struct in6_addr addr;
1502 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1503 if (ipv6_addr_any(&addr))
1505 __ipv6_dev_ac_dec(ifp->idev, &addr);
1508 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1510 if (dev->addr_len != ETH_ALEN)
1512 memcpy(eui, dev->dev_addr, 3);
1513 memcpy(eui + 5, dev->dev_addr + 3, 3);
1516 * The zSeries OSA network cards can be shared among various
1517 * OS instances, but the OSA cards have only one MAC address.
1518 * This leads to duplicate address conflicts in conjunction
1519 * with IPv6 if more than one instance uses the same card.
1521 * The driver for these cards can deliver a unique 16-bit
1522 * identifier for each instance sharing the same card. It is
1523 * placed instead of 0xFFFE in the interface identifier. The
1524 * "u" bit of the interface identifier is not inverted in this
1525 * case. Hence the resulting interface identifier has local
1526 * scope according to RFC2373.
1529 eui[3] = (dev->dev_id >> 8) & 0xFF;
1530 eui[4] = dev->dev_id & 0xFF;
1539 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1541 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1542 if (dev->addr_len != ARCNET_ALEN)
1545 eui[7] = *(u8*)dev->dev_addr;
1549 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1551 if (dev->addr_len != INFINIBAND_ALEN)
1553 memcpy(eui, dev->dev_addr + 12, 8);
1558 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1560 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1561 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1562 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1563 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1564 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1565 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1569 memcpy(eui + 4, &addr, 4);
1572 EXPORT_SYMBOL(__ipv6_isatap_ifid);
1574 static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1576 if (dev->priv_flags & IFF_ISATAP)
1577 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1581 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1583 switch (dev->type) {
1586 case ARPHRD_IEEE802_TR:
1587 return addrconf_ifid_eui48(eui, dev);
1589 return addrconf_ifid_arcnet(eui, dev);
1590 case ARPHRD_INFINIBAND:
1591 return addrconf_ifid_infiniband(eui, dev);
1593 return addrconf_ifid_sit(eui, dev);
1598 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1601 struct inet6_ifaddr *ifp;
1603 read_lock_bh(&idev->lock);
1604 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1605 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1606 memcpy(eui, ifp->addr.s6_addr+8, 8);
1611 read_unlock_bh(&idev->lock);
1615 #ifdef CONFIG_IPV6_PRIVACY
1616 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1617 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1620 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1621 idev->rndid[0] &= ~0x02;
1624 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1625 * check if generated address is not inappropriate
1627 * - Reserved subnet anycast (RFC 2526)
1628 * 11111101 11....11 1xxxxxxx
1629 * - ISATAP (RFC4214) 6.1
1630 * 00-00-5E-FE-xx-xx-xx-xx
1632 * - XXX: already assigned to an address on the device
1634 if (idev->rndid[0] == 0xfd &&
1635 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1636 (idev->rndid[7]&0x80))
1638 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1639 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1641 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1648 static void ipv6_regen_rndid(unsigned long data)
1650 struct inet6_dev *idev = (struct inet6_dev *) data;
1651 unsigned long expires;
1654 write_lock_bh(&idev->lock);
1659 if (__ipv6_regen_rndid(idev) < 0)
1663 idev->cnf.temp_prefered_lft * HZ -
1664 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1665 if (time_before(expires, jiffies)) {
1667 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1672 if (!mod_timer(&idev->regen_timer, expires))
1676 write_unlock_bh(&idev->lock);
1677 rcu_read_unlock_bh();
1681 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1684 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1685 ret = __ipv6_regen_rndid(idev);
1695 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1696 unsigned long expires, u32 flags)
1698 struct fib6_config cfg = {
1699 .fc_table = RT6_TABLE_PREFIX,
1700 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1701 .fc_ifindex = dev->ifindex,
1702 .fc_expires = expires,
1704 .fc_flags = RTF_UP | flags,
1705 .fc_nlinfo.nl_net = dev_net(dev),
1706 .fc_protocol = RTPROT_KERNEL,
1709 ipv6_addr_copy(&cfg.fc_dst, pfx);
1711 /* Prevent useless cloning on PtP SIT.
1712 This thing is done here expecting that the whole
1713 class of non-broadcast devices need not cloning.
1715 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1716 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1717 cfg.fc_flags |= RTF_NONEXTHOP;
1720 ip6_route_add(&cfg);
1723 /* Create "default" multicast route to the interface */
1725 static void addrconf_add_mroute(struct net_device *dev)
1727 struct fib6_config cfg = {
1728 .fc_table = RT6_TABLE_LOCAL,
1729 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1730 .fc_ifindex = dev->ifindex,
1733 .fc_nlinfo.nl_net = dev_net(dev),
1736 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1738 ip6_route_add(&cfg);
1741 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1742 static void sit_route_add(struct net_device *dev)
1744 struct fib6_config cfg = {
1745 .fc_table = RT6_TABLE_MAIN,
1746 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1747 .fc_ifindex = dev->ifindex,
1749 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1750 .fc_nlinfo.nl_net = dev_net(dev),
1753 /* prefix length - 96 bits "::d.d.d.d" */
1754 ip6_route_add(&cfg);
1758 static void addrconf_add_lroute(struct net_device *dev)
1760 struct in6_addr addr;
1762 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1763 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1766 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1768 struct inet6_dev *idev;
1772 if ((idev = ipv6_find_idev(dev)) == NULL)
1775 /* Add default multicast route */
1776 addrconf_add_mroute(dev);
1778 /* Add link local route */
1779 addrconf_add_lroute(dev);
1783 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1785 struct prefix_info *pinfo;
1789 struct inet6_dev *in6_dev;
1791 pinfo = (struct prefix_info *) opt;
1793 if (len < sizeof(struct prefix_info)) {
1794 ADBG(("addrconf: prefix option too short\n"));
1799 * Validation checks ([ADDRCONF], page 19)
1802 addr_type = ipv6_addr_type(&pinfo->prefix);
1804 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1807 valid_lft = ntohl(pinfo->valid);
1808 prefered_lft = ntohl(pinfo->prefered);
1810 if (prefered_lft > valid_lft) {
1811 if (net_ratelimit())
1812 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1816 in6_dev = in6_dev_get(dev);
1818 if (in6_dev == NULL) {
1819 if (net_ratelimit())
1820 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1825 * Two things going on here:
1826 * 1) Add routes for on-link prefixes
1827 * 2) Configure prefixes with the auto flag set
1830 if (pinfo->onlink) {
1831 struct rt6_info *rt;
1832 unsigned long rt_expires;
1834 /* Avoid arithmetic overflow. Really, we could
1835 * save rt_expires in seconds, likely valid_lft,
1836 * but it would require division in fib gc, that it
1840 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1842 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
1844 if (addrconf_finite_timeout(rt_expires))
1847 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
1850 if (rt && addrconf_is_prefix_route(rt)) {
1851 /* Autoconf prefix route */
1852 if (valid_lft == 0) {
1855 } else if (addrconf_finite_timeout(rt_expires)) {
1857 rt->rt6i_expires = jiffies + rt_expires;
1858 rt->rt6i_flags |= RTF_EXPIRES;
1860 rt->rt6i_flags &= ~RTF_EXPIRES;
1861 rt->rt6i_expires = 0;
1863 } else if (valid_lft) {
1864 clock_t expires = 0;
1865 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1866 if (addrconf_finite_timeout(rt_expires)) {
1868 flags |= RTF_EXPIRES;
1869 expires = jiffies_to_clock_t(rt_expires);
1871 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1872 dev, expires, flags);
1875 dst_release(&rt->u.dst);
1878 /* Try to figure out our local address for this prefix */
1880 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1881 struct inet6_ifaddr * ifp;
1882 struct in6_addr addr;
1883 int create = 0, update_lft = 0;
1884 struct net *net = dev_net(dev);
1886 if (pinfo->prefix_len == 64) {
1887 memcpy(&addr, &pinfo->prefix, 8);
1888 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1889 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1890 in6_dev_put(in6_dev);
1895 if (net_ratelimit())
1896 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1898 in6_dev_put(in6_dev);
1903 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1905 if (ifp == NULL && valid_lft) {
1906 int max_addresses = in6_dev->cnf.max_addresses;
1909 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1910 if (in6_dev->cnf.optimistic_dad &&
1911 !net->ipv6.devconf_all->forwarding)
1912 addr_flags = IFA_F_OPTIMISTIC;
1915 /* Do not allow to create too much of autoconfigured
1916 * addresses; this would be too easy way to crash kernel.
1918 if (!max_addresses ||
1919 ipv6_count_addresses(in6_dev) < max_addresses)
1920 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1921 addr_type&IPV6_ADDR_SCOPE_MASK,
1924 if (!ifp || IS_ERR(ifp)) {
1925 in6_dev_put(in6_dev);
1929 update_lft = create = 1;
1930 ifp->cstamp = jiffies;
1931 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1937 #ifdef CONFIG_IPV6_PRIVACY
1938 struct inet6_ifaddr *ift;
1942 /* update lifetime (RFC2462 5.5.3 e) */
1943 spin_lock(&ifp->lock);
1945 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1946 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1949 if (!update_lft && stored_lft) {
1950 if (valid_lft > MIN_VALID_LIFETIME ||
1951 valid_lft > stored_lft)
1953 else if (stored_lft <= MIN_VALID_LIFETIME) {
1954 /* valid_lft <= stored_lft is always true */
1958 valid_lft = MIN_VALID_LIFETIME;
1959 if (valid_lft < prefered_lft)
1960 prefered_lft = valid_lft;
1966 ifp->valid_lft = valid_lft;
1967 ifp->prefered_lft = prefered_lft;
1970 ifp->flags &= ~IFA_F_DEPRECATED;
1971 spin_unlock(&ifp->lock);
1973 if (!(flags&IFA_F_TENTATIVE))
1974 ipv6_ifa_notify(0, ifp);
1976 spin_unlock(&ifp->lock);
1978 #ifdef CONFIG_IPV6_PRIVACY
1979 read_lock_bh(&in6_dev->lock);
1980 /* update all temporary addresses in the list */
1981 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1983 * When adjusting the lifetimes of an existing
1984 * temporary address, only lower the lifetimes.
1985 * Implementations must not increase the
1986 * lifetimes of an existing temporary address
1987 * when processing a Prefix Information Option.
1989 if (ifp != ift->ifpub)
1992 spin_lock(&ift->lock);
1994 if (ift->valid_lft > valid_lft &&
1995 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1996 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1997 if (ift->prefered_lft > prefered_lft &&
1998 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1999 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
2000 spin_unlock(&ift->lock);
2001 if (!(flags&IFA_F_TENTATIVE))
2002 ipv6_ifa_notify(0, ift);
2005 if (create && in6_dev->cnf.use_tempaddr > 0) {
2007 * When a new public address is created as described in [ADDRCONF],
2008 * also create a new temporary address.
2010 read_unlock_bh(&in6_dev->lock);
2011 ipv6_create_tempaddr(ifp, NULL);
2013 read_unlock_bh(&in6_dev->lock);
2020 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2021 in6_dev_put(in6_dev);
2025 * Set destination address.
2026 * Special case for SIT interfaces where we create a new "virtual"
2029 int addrconf_set_dstaddr(struct net *net, void __user *arg)
2031 struct in6_ifreq ireq;
2032 struct net_device *dev;
2038 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2041 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
2047 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2048 if (dev->type == ARPHRD_SIT) {
2049 const struct net_device_ops *ops = dev->netdev_ops;
2051 struct ip_tunnel_parm p;
2053 err = -EADDRNOTAVAIL;
2054 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2057 memset(&p, 0, sizeof(p));
2058 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2062 p.iph.protocol = IPPROTO_IPV6;
2064 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
2066 if (ops->ndo_do_ioctl) {
2067 mm_segment_t oldfs = get_fs();
2070 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2077 dev = __dev_get_by_name(net, p.name);
2080 err = dev_open(dev);
2091 * Manual configuration of address on an interface
2093 static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
2094 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
2097 struct inet6_ifaddr *ifp;
2098 struct inet6_dev *idev;
2099 struct net_device *dev;
2103 unsigned long timeout;
2110 /* check the lifetime */
2111 if (!valid_lft || prefered_lft > valid_lft)
2114 dev = __dev_get_by_index(net, ifindex);
2118 if ((idev = addrconf_add_dev(dev)) == NULL)
2121 scope = ipv6_addr_scope(pfx);
2123 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2124 if (addrconf_finite_timeout(timeout)) {
2125 expires = jiffies_to_clock_t(timeout * HZ);
2126 valid_lft = timeout;
2127 flags = RTF_EXPIRES;
2131 ifa_flags |= IFA_F_PERMANENT;
2134 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2135 if (addrconf_finite_timeout(timeout)) {
2137 ifa_flags |= IFA_F_DEPRECATED;
2138 prefered_lft = timeout;
2141 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2144 spin_lock_bh(&ifp->lock);
2145 ifp->valid_lft = valid_lft;
2146 ifp->prefered_lft = prefered_lft;
2147 ifp->tstamp = jiffies;
2148 spin_unlock_bh(&ifp->lock);
2150 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2153 * Note that section 3.1 of RFC 4429 indicates
2154 * that the Optimistic flag should not be set for
2155 * manually configured addresses
2157 addrconf_dad_start(ifp, 0);
2163 return PTR_ERR(ifp);
2166 static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
2169 struct inet6_ifaddr *ifp;
2170 struct inet6_dev *idev;
2171 struct net_device *dev;
2176 dev = __dev_get_by_index(net, ifindex);
2180 if ((idev = __in6_dev_get(dev)) == NULL)
2183 read_lock_bh(&idev->lock);
2184 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2185 if (ifp->prefix_len == plen &&
2186 ipv6_addr_equal(pfx, &ifp->addr)) {
2188 read_unlock_bh(&idev->lock);
2192 /* If the last address is deleted administratively,
2193 disable IPv6 on this interface.
2195 if (idev->addr_list == NULL)
2196 addrconf_ifdown(idev->dev, 1);
2200 read_unlock_bh(&idev->lock);
2201 return -EADDRNOTAVAIL;
2205 int addrconf_add_ifaddr(struct net *net, void __user *arg)
2207 struct in6_ifreq ireq;
2210 if (!capable(CAP_NET_ADMIN))
2213 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2217 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2218 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2219 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2224 int addrconf_del_ifaddr(struct net *net, void __user *arg)
2226 struct in6_ifreq ireq;
2229 if (!capable(CAP_NET_ADMIN))
2232 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2236 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2237 ireq.ifr6_prefixlen);
2242 static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2243 int plen, int scope)
2245 struct inet6_ifaddr *ifp;
2247 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2249 spin_lock_bh(&ifp->lock);
2250 ifp->flags &= ~IFA_F_TENTATIVE;
2251 spin_unlock_bh(&ifp->lock);
2252 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2257 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2258 static void sit_add_v4_addrs(struct inet6_dev *idev)
2260 struct in6_addr addr;
2261 struct net_device *dev;
2262 struct net *net = dev_net(idev->dev);
2267 memset(&addr, 0, sizeof(struct in6_addr));
2268 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2270 if (idev->dev->flags&IFF_POINTOPOINT) {
2271 addr.s6_addr32[0] = htonl(0xfe800000);
2274 scope = IPV6_ADDR_COMPATv4;
2277 if (addr.s6_addr32[3]) {
2278 add_addr(idev, &addr, 128, scope);
2282 for_each_netdev(net, dev) {
2283 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2284 if (in_dev && (dev->flags & IFF_UP)) {
2285 struct in_ifaddr * ifa;
2289 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2292 addr.s6_addr32[3] = ifa->ifa_local;
2294 if (ifa->ifa_scope == RT_SCOPE_LINK)
2296 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2297 if (idev->dev->flags&IFF_POINTOPOINT)
2301 if (idev->dev->flags&IFF_POINTOPOINT)
2306 add_addr(idev, &addr, plen, flag);
2313 static void init_loopback(struct net_device *dev)
2315 struct inet6_dev *idev;
2321 if ((idev = ipv6_find_idev(dev)) == NULL) {
2322 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2326 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
2329 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2331 struct inet6_ifaddr * ifp;
2332 u32 addr_flags = IFA_F_PERMANENT;
2334 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2335 if (idev->cnf.optimistic_dad &&
2336 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
2337 addr_flags |= IFA_F_OPTIMISTIC;
2341 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2343 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2344 addrconf_dad_start(ifp, 0);
2349 static void addrconf_dev_config(struct net_device *dev)
2351 struct in6_addr addr;
2352 struct inet6_dev * idev;
2356 if ((dev->type != ARPHRD_ETHER) &&
2357 (dev->type != ARPHRD_FDDI) &&
2358 (dev->type != ARPHRD_IEEE802_TR) &&
2359 (dev->type != ARPHRD_ARCNET) &&
2360 (dev->type != ARPHRD_INFINIBAND)) {
2361 /* Alas, we support only Ethernet autoconfiguration. */
2365 idev = addrconf_add_dev(dev);
2369 memset(&addr, 0, sizeof(struct in6_addr));
2370 addr.s6_addr32[0] = htonl(0xFE800000);
2372 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2373 addrconf_add_linklocal(idev, &addr);
2376 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2377 static void addrconf_sit_config(struct net_device *dev)
2379 struct inet6_dev *idev;
2384 * Configure the tunnel with one of our IPv4
2385 * addresses... we should configure all of
2386 * our v4 addrs in the tunnel
2389 if ((idev = ipv6_find_idev(dev)) == NULL) {
2390 printk(KERN_DEBUG "init sit: add_dev failed\n");
2394 if (dev->priv_flags & IFF_ISATAP) {
2395 struct in6_addr addr;
2397 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2398 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2399 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2400 addrconf_add_linklocal(idev, &addr);
2404 sit_add_v4_addrs(idev);
2406 if (dev->flags&IFF_POINTOPOINT) {
2407 addrconf_add_mroute(dev);
2408 addrconf_add_lroute(dev);
2415 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2417 struct in6_addr lladdr;
2419 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2420 addrconf_add_linklocal(idev, &lladdr);
2426 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2428 struct net_device *link_dev;
2429 struct net *net = dev_net(idev->dev);
2431 /* first try to inherit the link-local address from the link device */
2432 if (idev->dev->iflink &&
2433 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
2434 if (!ipv6_inherit_linklocal(idev, link_dev))
2437 /* then try to inherit it from any device */
2438 for_each_netdev(net, link_dev) {
2439 if (!ipv6_inherit_linklocal(idev, link_dev))
2442 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2446 * Autoconfigure tunnel with a link-local address so routing protocols,
2447 * DHCPv6, MLD etc. can be run over the virtual link
2450 static void addrconf_ip6_tnl_config(struct net_device *dev)
2452 struct inet6_dev *idev;
2456 if ((idev = addrconf_add_dev(dev)) == NULL) {
2457 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2460 ip6_tnl_add_linklocal(idev);
2463 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2466 struct net_device *dev = (struct net_device *) data;
2467 struct inet6_dev *idev = __in6_dev_get(dev);
2468 int run_pending = 0;
2472 case NETDEV_REGISTER:
2473 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2474 idev = ipv6_add_dev(dev);
2476 return notifier_from_errno(-ENOMEM);
2481 if (dev->flags & IFF_SLAVE)
2484 if (event == NETDEV_UP) {
2485 if (!addrconf_qdisc_ok(dev)) {
2486 /* device is not ready yet. */
2488 "ADDRCONF(NETDEV_UP): %s: "
2489 "link is not ready\n",
2494 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2495 idev = ipv6_add_dev(dev);
2498 idev->if_flags |= IF_READY;
2502 if (!addrconf_qdisc_ok(dev)) {
2503 /* device is still not ready. */
2508 if (idev->if_flags & IF_READY) {
2509 /* device is already configured. */
2512 idev->if_flags |= IF_READY;
2516 "ADDRCONF(NETDEV_CHANGE): %s: "
2517 "link becomes ready\n",
2524 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2526 addrconf_sit_config(dev);
2529 case ARPHRD_TUNNEL6:
2530 addrconf_ip6_tnl_config(dev);
2532 case ARPHRD_LOOPBACK:
2537 addrconf_dev_config(dev);
2542 addrconf_dad_run(idev);
2544 /* If the MTU changed during the interface down, when the
2545 interface up, the changed MTU must be reflected in the
2546 idev as well as routers.
2548 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2549 rt6_mtu_change(dev, dev->mtu);
2550 idev->cnf.mtu6 = dev->mtu;
2552 idev->tstamp = jiffies;
2553 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2554 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2555 stop IPv6 on this interface.
2557 if (dev->mtu < IPV6_MIN_MTU)
2558 addrconf_ifdown(dev, event != NETDEV_DOWN);
2562 case NETDEV_CHANGEMTU:
2563 if (idev && dev->mtu >= IPV6_MIN_MTU) {
2564 rt6_mtu_change(dev, dev->mtu);
2565 idev->cnf.mtu6 = dev->mtu;
2569 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2570 idev = ipv6_add_dev(dev);
2575 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2578 case NETDEV_UNREGISTER:
2580 * Remove all addresses from this interface.
2582 addrconf_ifdown(dev, event != NETDEV_DOWN);
2585 case NETDEV_CHANGENAME:
2587 snmp6_unregister_dev(idev);
2588 addrconf_sysctl_unregister(idev);
2589 addrconf_sysctl_register(idev);
2590 err = snmp6_register_dev(idev);
2592 return notifier_from_errno(err);
2601 * addrconf module should be notified of a device going up
2603 static struct notifier_block ipv6_dev_notf = {
2604 .notifier_call = addrconf_notify,
2608 static int addrconf_ifdown(struct net_device *dev, int how)
2610 struct inet6_dev *idev;
2611 struct inet6_ifaddr *ifa, **bifa;
2612 struct net *net = dev_net(dev);
2617 rt6_ifdown(net, dev);
2618 neigh_ifdown(&nd_tbl, dev);
2620 idev = __in6_dev_get(dev);
2624 /* Step 1: remove reference to ipv6 device from parent device.
2630 /* protected by rtnl_lock */
2631 rcu_assign_pointer(dev->ip6_ptr, NULL);
2633 /* Step 1.5: remove snmp6 entry */
2634 snmp6_unregister_dev(idev);
2638 /* Step 2: clear hash table */
2639 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2640 bifa = &inet6_addr_lst[i];
2642 write_lock_bh(&addrconf_hash_lock);
2643 while ((ifa = *bifa) != NULL) {
2644 if (ifa->idev == idev) {
2645 *bifa = ifa->lst_next;
2646 ifa->lst_next = NULL;
2647 addrconf_del_timer(ifa);
2651 bifa = &ifa->lst_next;
2653 write_unlock_bh(&addrconf_hash_lock);
2656 write_lock_bh(&idev->lock);
2658 /* Step 3: clear flags for stateless addrconf */
2660 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2662 /* Step 4: clear address list */
2663 #ifdef CONFIG_IPV6_PRIVACY
2664 if (how && del_timer(&idev->regen_timer))
2667 /* clear tempaddr list */
2668 while ((ifa = idev->tempaddr_list) != NULL) {
2669 idev->tempaddr_list = ifa->tmp_next;
2670 ifa->tmp_next = NULL;
2672 write_unlock_bh(&idev->lock);
2673 spin_lock_bh(&ifa->lock);
2676 in6_ifa_put(ifa->ifpub);
2679 spin_unlock_bh(&ifa->lock);
2681 write_lock_bh(&idev->lock);
2684 while ((ifa = idev->addr_list) != NULL) {
2685 idev->addr_list = ifa->if_next;
2686 ifa->if_next = NULL;
2688 addrconf_del_timer(ifa);
2689 write_unlock_bh(&idev->lock);
2691 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2692 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2695 write_lock_bh(&idev->lock);
2697 write_unlock_bh(&idev->lock);
2699 /* Step 5: Discard multicast list */
2702 ipv6_mc_destroy_dev(idev);
2706 idev->tstamp = jiffies;
2708 /* Shot the device (if unregistered) */
2711 addrconf_sysctl_unregister(idev);
2712 neigh_parms_release(&nd_tbl, idev->nd_parms);
2713 neigh_ifdown(&nd_tbl, dev);
2719 static void addrconf_rs_timer(unsigned long data)
2721 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2723 if (ifp->idev->cnf.forwarding)
2726 if (ifp->idev->if_flags & IF_RA_RCVD) {
2728 * Announcement received after solicitation
2734 spin_lock(&ifp->lock);
2735 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2736 /* The wait after the last probe can be shorter */
2737 addrconf_mod_timer(ifp, AC_RS,
2738 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2739 ifp->idev->cnf.rtr_solicit_delay :
2740 ifp->idev->cnf.rtr_solicit_interval);
2741 spin_unlock(&ifp->lock);
2743 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2745 spin_unlock(&ifp->lock);
2747 * Note: we do not support deprecated "all on-link"
2748 * assumption any longer.
2750 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2751 ifp->idev->dev->name);
2759 * Duplicate Address Detection
2761 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2763 unsigned long rand_num;
2764 struct inet6_dev *idev = ifp->idev;
2766 if (ifp->flags & IFA_F_OPTIMISTIC)
2769 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2771 ifp->probes = idev->cnf.dad_transmits;
2772 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2775 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2777 struct inet6_dev *idev = ifp->idev;
2778 struct net_device *dev = idev->dev;
2780 addrconf_join_solict(dev, &ifp->addr);
2782 net_srandom(ifp->addr.s6_addr32[3]);
2784 read_lock_bh(&idev->lock);
2787 spin_lock_bh(&ifp->lock);
2789 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2790 idev->cnf.accept_dad < 1 ||
2791 !(ifp->flags&IFA_F_TENTATIVE) ||
2792 ifp->flags & IFA_F_NODAD) {
2793 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2794 spin_unlock_bh(&ifp->lock);
2795 read_unlock_bh(&idev->lock);
2797 addrconf_dad_completed(ifp);
2801 if (!(idev->if_flags & IF_READY)) {
2802 spin_unlock_bh(&ifp->lock);
2803 read_unlock_bh(&idev->lock);
2805 * If the defice is not ready:
2806 * - keep it tentative if it is a permanent address.
2807 * - otherwise, kill it.
2810 addrconf_dad_stop(ifp);
2815 * Optimistic nodes can start receiving
2818 if(ifp->flags & IFA_F_OPTIMISTIC)
2819 ip6_ins_rt(ifp->rt);
2821 addrconf_dad_kick(ifp);
2822 spin_unlock_bh(&ifp->lock);
2824 read_unlock_bh(&idev->lock);
2827 static void addrconf_dad_timer(unsigned long data)
2829 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2830 struct inet6_dev *idev = ifp->idev;
2831 struct in6_addr mcaddr;
2833 read_lock_bh(&idev->lock);
2835 read_unlock_bh(&idev->lock);
2838 spin_lock_bh(&ifp->lock);
2839 if (ifp->probes == 0) {
2841 * DAD was successful
2844 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2845 spin_unlock_bh(&ifp->lock);
2846 read_unlock_bh(&idev->lock);
2848 addrconf_dad_completed(ifp);
2854 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2855 spin_unlock_bh(&ifp->lock);
2856 read_unlock_bh(&idev->lock);
2858 /* send a neighbour solicitation for our addr */
2859 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2860 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
2865 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2867 struct net_device * dev = ifp->idev->dev;
2870 * Configure the address for reception. Now it is valid.
2873 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2875 /* If added prefix is link local and forwarding is off,
2876 start sending router solicitations.
2879 if (ifp->idev->cnf.forwarding == 0 &&
2880 ifp->idev->cnf.rtr_solicits > 0 &&
2881 (dev->flags&IFF_LOOPBACK) == 0 &&
2882 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2884 * If a host as already performed a random delay
2885 * [...] as part of DAD [...] there is no need
2886 * to delay again before sending the first RS
2888 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2890 spin_lock_bh(&ifp->lock);
2892 ifp->idev->if_flags |= IF_RS_SENT;
2893 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2894 spin_unlock_bh(&ifp->lock);
2898 static void addrconf_dad_run(struct inet6_dev *idev) {
2899 struct inet6_ifaddr *ifp;
2901 read_lock_bh(&idev->lock);
2902 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2903 spin_lock_bh(&ifp->lock);
2904 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2905 spin_unlock_bh(&ifp->lock);
2908 spin_unlock_bh(&ifp->lock);
2909 addrconf_dad_kick(ifp);
2911 read_unlock_bh(&idev->lock);
2914 #ifdef CONFIG_PROC_FS
2915 struct if6_iter_state {
2916 struct seq_net_private p;
2920 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2922 struct inet6_ifaddr *ifa = NULL;
2923 struct if6_iter_state *state = seq->private;
2924 struct net *net = seq_file_net(seq);
2926 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2927 ifa = inet6_addr_lst[state->bucket];
2929 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
2930 ifa = ifa->lst_next;
2937 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2939 struct if6_iter_state *state = seq->private;
2940 struct net *net = seq_file_net(seq);
2942 ifa = ifa->lst_next;
2945 if (!net_eq(dev_net(ifa->idev->dev), net)) {
2946 ifa = ifa->lst_next;
2951 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2952 ifa = inet6_addr_lst[state->bucket];
2959 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2961 struct inet6_ifaddr *ifa = if6_get_first(seq);
2964 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2966 return pos ? NULL : ifa;
2969 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2970 __acquires(addrconf_hash_lock)
2972 read_lock_bh(&addrconf_hash_lock);
2973 return if6_get_idx(seq, *pos);
2976 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2978 struct inet6_ifaddr *ifa;
2980 ifa = if6_get_next(seq, v);
2985 static void if6_seq_stop(struct seq_file *seq, void *v)
2986 __releases(addrconf_hash_lock)
2988 read_unlock_bh(&addrconf_hash_lock);
2991 static int if6_seq_show(struct seq_file *seq, void *v)
2993 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2994 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
2996 ifp->idev->dev->ifindex,
3000 ifp->idev->dev->name);
3004 static const struct seq_operations if6_seq_ops = {
3005 .start = if6_seq_start,
3006 .next = if6_seq_next,
3007 .show = if6_seq_show,
3008 .stop = if6_seq_stop,
3011 static int if6_seq_open(struct inode *inode, struct file *file)
3013 return seq_open_net(inode, file, &if6_seq_ops,
3014 sizeof(struct if6_iter_state));
3017 static const struct file_operations if6_fops = {
3018 .owner = THIS_MODULE,
3019 .open = if6_seq_open,
3021 .llseek = seq_lseek,
3022 .release = seq_release_net,
3025 static int if6_proc_net_init(struct net *net)
3027 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
3032 static void if6_proc_net_exit(struct net *net)
3034 proc_net_remove(net, "if_inet6");
3037 static struct pernet_operations if6_proc_net_ops = {
3038 .init = if6_proc_net_init,
3039 .exit = if6_proc_net_exit,
3042 int __init if6_proc_init(void)
3044 return register_pernet_subsys(&if6_proc_net_ops);
3047 void if6_proc_exit(void)
3049 unregister_pernet_subsys(&if6_proc_net_ops);
3051 #endif /* CONFIG_PROC_FS */
3053 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3054 /* Check if address is a home address configured on any interface. */
3055 int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3058 struct inet6_ifaddr * ifp;
3059 u8 hash = ipv6_addr_hash(addr);
3060 read_lock_bh(&addrconf_hash_lock);
3061 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
3062 if (!net_eq(dev_net(ifp->idev->dev), net))
3064 if (ipv6_addr_equal(&ifp->addr, addr) &&
3065 (ifp->flags & IFA_F_HOMEADDRESS)) {
3070 read_unlock_bh(&addrconf_hash_lock);
3076 * Periodic address status verification
3079 static void addrconf_verify(unsigned long foo)
3081 struct inet6_ifaddr *ifp;
3082 unsigned long now, next;
3085 spin_lock_bh(&addrconf_verify_lock);
3087 next = now + ADDR_CHECK_FREQUENCY;
3089 del_timer(&addr_chk_timer);
3091 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3094 read_lock(&addrconf_hash_lock);
3095 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3097 #ifdef CONFIG_IPV6_PRIVACY
3098 unsigned long regen_advance;
3101 if (ifp->flags & IFA_F_PERMANENT)
3104 spin_lock(&ifp->lock);
3105 age = (now - ifp->tstamp) / HZ;
3107 #ifdef CONFIG_IPV6_PRIVACY
3108 regen_advance = ifp->idev->cnf.regen_max_retry *
3109 ifp->idev->cnf.dad_transmits *
3110 ifp->idev->nd_parms->retrans_time / HZ;
3113 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3114 age >= ifp->valid_lft) {
3115 spin_unlock(&ifp->lock);
3117 read_unlock(&addrconf_hash_lock);
3120 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3121 spin_unlock(&ifp->lock);
3123 } else if (age >= ifp->prefered_lft) {
3124 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3127 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3129 ifp->flags |= IFA_F_DEPRECATED;
3132 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3133 next = ifp->tstamp + ifp->valid_lft * HZ;
3135 spin_unlock(&ifp->lock);
3139 read_unlock(&addrconf_hash_lock);
3141 ipv6_ifa_notify(0, ifp);
3145 #ifdef CONFIG_IPV6_PRIVACY
3146 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3147 !(ifp->flags&IFA_F_TENTATIVE)) {
3148 if (age >= ifp->prefered_lft - regen_advance) {
3149 struct inet6_ifaddr *ifpub = ifp->ifpub;
3150 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3151 next = ifp->tstamp + ifp->prefered_lft * HZ;
3152 if (!ifp->regen_count && ifpub) {
3155 in6_ifa_hold(ifpub);
3156 spin_unlock(&ifp->lock);
3157 read_unlock(&addrconf_hash_lock);
3158 spin_lock(&ifpub->lock);
3159 ifpub->regen_count = 0;
3160 spin_unlock(&ifpub->lock);
3161 ipv6_create_tempaddr(ifpub, ifp);
3166 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3167 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3168 spin_unlock(&ifp->lock);
3171 /* ifp->prefered_lft <= ifp->valid_lft */
3172 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3173 next = ifp->tstamp + ifp->prefered_lft * HZ;
3174 spin_unlock(&ifp->lock);
3177 read_unlock(&addrconf_hash_lock);
3180 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3181 add_timer(&addr_chk_timer);
3182 spin_unlock_bh(&addrconf_verify_lock);
3185 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3187 struct in6_addr *pfx = NULL;
3190 pfx = nla_data(addr);
3193 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3196 pfx = nla_data(local);
3202 static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3203 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3204 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3205 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3209 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3211 struct net *net = sock_net(skb->sk);
3212 struct ifaddrmsg *ifm;
3213 struct nlattr *tb[IFA_MAX+1];
3214 struct in6_addr *pfx;
3217 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3221 ifm = nlmsg_data(nlh);
3222 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3226 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3229 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3230 u32 prefered_lft, u32 valid_lft)
3234 unsigned long timeout;
3236 if (!valid_lft || (prefered_lft > valid_lft))
3239 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3240 if (addrconf_finite_timeout(timeout)) {
3241 expires = jiffies_to_clock_t(timeout * HZ);
3242 valid_lft = timeout;
3243 flags = RTF_EXPIRES;
3247 ifa_flags |= IFA_F_PERMANENT;
3250 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3251 if (addrconf_finite_timeout(timeout)) {
3253 ifa_flags |= IFA_F_DEPRECATED;
3254 prefered_lft = timeout;
3257 spin_lock_bh(&ifp->lock);
3258 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3259 ifp->tstamp = jiffies;
3260 ifp->valid_lft = valid_lft;
3261 ifp->prefered_lft = prefered_lft;
3263 spin_unlock_bh(&ifp->lock);
3264 if (!(ifp->flags&IFA_F_TENTATIVE))
3265 ipv6_ifa_notify(0, ifp);
3267 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3275 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3277 struct net *net = sock_net(skb->sk);
3278 struct ifaddrmsg *ifm;
3279 struct nlattr *tb[IFA_MAX+1];
3280 struct in6_addr *pfx;
3281 struct inet6_ifaddr *ifa;
3282 struct net_device *dev;
3283 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3287 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3291 ifm = nlmsg_data(nlh);
3292 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3296 if (tb[IFA_CACHEINFO]) {
3297 struct ifa_cacheinfo *ci;
3299 ci = nla_data(tb[IFA_CACHEINFO]);
3300 valid_lft = ci->ifa_valid;
3301 preferred_lft = ci->ifa_prefered;
3303 preferred_lft = INFINITY_LIFE_TIME;
3304 valid_lft = INFINITY_LIFE_TIME;
3307 dev = __dev_get_by_index(net, ifm->ifa_index);
3311 /* We ignore other flags so far. */
3312 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3314 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
3317 * It would be best to check for !NLM_F_CREATE here but
3318 * userspace alreay relies on not having to provide this.
3320 return inet6_addr_add(net, ifm->ifa_index, pfx,
3321 ifm->ifa_prefixlen, ifa_flags,
3322 preferred_lft, valid_lft);
3325 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3326 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3329 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3336 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3337 u8 scope, int ifindex)
3339 struct ifaddrmsg *ifm;
3341 ifm = nlmsg_data(nlh);
3342 ifm->ifa_family = AF_INET6;
3343 ifm->ifa_prefixlen = prefixlen;
3344 ifm->ifa_flags = flags;
3345 ifm->ifa_scope = scope;
3346 ifm->ifa_index = ifindex;
3349 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3350 unsigned long tstamp, u32 preferred, u32 valid)
3352 struct ifa_cacheinfo ci;
3354 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3355 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3356 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3357 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3358 ci.ifa_prefered = preferred;
3359 ci.ifa_valid = valid;
3361 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3364 static inline int rt_scope(int ifa_scope)
3366 if (ifa_scope & IFA_HOST)
3367 return RT_SCOPE_HOST;
3368 else if (ifa_scope & IFA_LINK)
3369 return RT_SCOPE_LINK;
3370 else if (ifa_scope & IFA_SITE)
3371 return RT_SCOPE_SITE;
3373 return RT_SCOPE_UNIVERSE;
3376 static inline int inet6_ifaddr_msgsize(void)
3378 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3379 + nla_total_size(16) /* IFA_ADDRESS */
3380 + nla_total_size(sizeof(struct ifa_cacheinfo));
3383 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3384 u32 pid, u32 seq, int event, unsigned int flags)
3386 struct nlmsghdr *nlh;
3387 u32 preferred, valid;
3389 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3393 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3394 ifa->idev->dev->ifindex);
3396 if (!(ifa->flags&IFA_F_PERMANENT)) {
3397 preferred = ifa->prefered_lft;
3398 valid = ifa->valid_lft;
3399 if (preferred != INFINITY_LIFE_TIME) {
3400 long tval = (jiffies - ifa->tstamp)/HZ;
3402 if (valid != INFINITY_LIFE_TIME)
3406 preferred = INFINITY_LIFE_TIME;
3407 valid = INFINITY_LIFE_TIME;
3410 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3411 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3412 nlmsg_cancel(skb, nlh);
3416 return nlmsg_end(skb, nlh);
3419 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3420 u32 pid, u32 seq, int event, u16 flags)
3422 struct nlmsghdr *nlh;
3423 u8 scope = RT_SCOPE_UNIVERSE;
3424 int ifindex = ifmca->idev->dev->ifindex;
3426 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3427 scope = RT_SCOPE_SITE;
3429 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3433 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3434 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3435 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3436 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3437 nlmsg_cancel(skb, nlh);
3441 return nlmsg_end(skb, nlh);
3444 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3445 u32 pid, u32 seq, int event, unsigned int flags)
3447 struct nlmsghdr *nlh;
3448 u8 scope = RT_SCOPE_UNIVERSE;
3449 int ifindex = ifaca->aca_idev->dev->ifindex;
3451 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3452 scope = RT_SCOPE_SITE;
3454 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3458 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3459 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3460 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3461 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3462 nlmsg_cancel(skb, nlh);
3466 return nlmsg_end(skb, nlh);
3476 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3477 enum addr_type_t type)
3480 int s_idx, s_ip_idx;
3482 struct net_device *dev;
3483 struct inet6_dev *idev = NULL;
3484 struct inet6_ifaddr *ifa;
3485 struct ifmcaddr6 *ifmca;
3486 struct ifacaddr6 *ifaca;
3487 struct net *net = sock_net(skb->sk);
3489 s_idx = cb->args[0];
3490 s_ip_idx = ip_idx = cb->args[1];
3493 for_each_netdev(net, dev) {
3499 if ((idev = in6_dev_get(dev)) == NULL)
3501 read_lock_bh(&idev->lock);
3504 /* unicast address incl. temp addr */
3505 for (ifa = idev->addr_list; ifa;
3506 ifa = ifa->if_next, ip_idx++) {
3507 if (ip_idx < s_ip_idx)
3509 err = inet6_fill_ifaddr(skb, ifa,
3510 NETLINK_CB(cb->skb).pid,
3516 case MULTICAST_ADDR:
3517 /* multicast address */
3518 for (ifmca = idev->mc_list; ifmca;
3519 ifmca = ifmca->next, ip_idx++) {
3520 if (ip_idx < s_ip_idx)
3522 err = inet6_fill_ifmcaddr(skb, ifmca,
3523 NETLINK_CB(cb->skb).pid,
3530 /* anycast address */
3531 for (ifaca = idev->ac_list; ifaca;
3532 ifaca = ifaca->aca_next, ip_idx++) {
3533 if (ip_idx < s_ip_idx)
3535 err = inet6_fill_ifacaddr(skb, ifaca,
3536 NETLINK_CB(cb->skb).pid,
3545 read_unlock_bh(&idev->lock);
3554 cb->args[1] = ip_idx;
3558 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3560 enum addr_type_t type = UNICAST_ADDR;
3562 return inet6_dump_addr(skb, cb, type);
3565 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3567 enum addr_type_t type = MULTICAST_ADDR;
3569 return inet6_dump_addr(skb, cb, type);
3573 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3575 enum addr_type_t type = ANYCAST_ADDR;
3577 return inet6_dump_addr(skb, cb, type);
3580 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3583 struct net *net = sock_net(in_skb->sk);
3584 struct ifaddrmsg *ifm;
3585 struct nlattr *tb[IFA_MAX+1];
3586 struct in6_addr *addr = NULL;
3587 struct net_device *dev = NULL;
3588 struct inet6_ifaddr *ifa;
3589 struct sk_buff *skb;
3592 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3596 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3602 ifm = nlmsg_data(nlh);
3604 dev = __dev_get_by_index(net, ifm->ifa_index);
3606 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
3607 err = -EADDRNOTAVAIL;
3611 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3616 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3617 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3619 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3620 WARN_ON(err == -EMSGSIZE);
3624 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
3631 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3633 struct sk_buff *skb;
3634 struct net *net = dev_net(ifa->idev->dev);
3637 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3641 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3643 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3644 WARN_ON(err == -EMSGSIZE);
3648 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3652 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3655 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3656 __s32 *array, int bytes)
3658 BUG_ON(bytes < (DEVCONF_MAX * 4));
3660 memset(array, 0, bytes);
3661 array[DEVCONF_FORWARDING] = cnf->forwarding;
3662 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3663 array[DEVCONF_MTU6] = cnf->mtu6;
3664 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3665 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3666 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3667 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3668 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3669 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3670 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3671 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3672 #ifdef CONFIG_IPV6_PRIVACY
3673 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3674 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3675 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3676 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3677 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3679 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3680 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3681 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3682 #ifdef CONFIG_IPV6_ROUTER_PREF
3683 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3684 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3685 #ifdef CONFIG_IPV6_ROUTE_INFO
3686 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3689 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3690 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3691 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3692 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3694 #ifdef CONFIG_IPV6_MROUTE
3695 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3697 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
3698 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
3701 static inline size_t inet6_if_nlmsg_size(void)
3703 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3704 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3705 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3706 + nla_total_size(4) /* IFLA_MTU */
3707 + nla_total_size(4) /* IFLA_LINK */
3708 + nla_total_size( /* IFLA_PROTINFO */
3709 nla_total_size(4) /* IFLA_INET6_FLAGS */
3710 + nla_total_size(sizeof(struct ifla_cacheinfo))
3711 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3712 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3713 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3717 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3721 int pad = bytes - sizeof(u64) * items;
3724 /* Use put_unaligned() because stats may not be aligned for u64. */
3725 put_unaligned(items, &stats[0]);
3726 for (i = 1; i < items; i++)
3727 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3729 memset(&stats[items], 0, pad);
3732 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3736 case IFLA_INET6_STATS:
3737 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3739 case IFLA_INET6_ICMP6STATS:
3740 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3745 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3746 u32 pid, u32 seq, int event, unsigned int flags)
3748 struct net_device *dev = idev->dev;
3750 struct ifinfomsg *hdr;
3751 struct nlmsghdr *nlh;
3753 struct ifla_cacheinfo ci;
3755 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3759 hdr = nlmsg_data(nlh);
3760 hdr->ifi_family = AF_INET6;
3762 hdr->ifi_type = dev->type;
3763 hdr->ifi_index = dev->ifindex;
3764 hdr->ifi_flags = dev_get_flags(dev);
3765 hdr->ifi_change = 0;
3767 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3770 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3772 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3773 if (dev->ifindex != dev->iflink)
3774 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3776 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3777 if (protoinfo == NULL)
3778 goto nla_put_failure;
3780 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3782 ci.max_reasm_len = IPV6_MAXPLEN;
3783 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3784 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3785 ci.reachable_time = idev->nd_parms->reachable_time;
3786 ci.retrans_time = idev->nd_parms->retrans_time;
3787 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3789 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3791 goto nla_put_failure;
3792 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3794 /* XXX - MC not implemented */
3796 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3798 goto nla_put_failure;
3799 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3801 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3803 goto nla_put_failure;
3804 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3806 nla_nest_end(skb, protoinfo);
3807 return nlmsg_end(skb, nlh);
3810 nlmsg_cancel(skb, nlh);
3814 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3816 struct net *net = sock_net(skb->sk);
3818 int s_idx = cb->args[0];
3819 struct net_device *dev;
3820 struct inet6_dev *idev;
3822 read_lock(&dev_base_lock);
3824 for_each_netdev(net, dev) {
3827 if ((idev = in6_dev_get(dev)) == NULL)
3829 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3830 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3837 read_unlock(&dev_base_lock);
3843 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3845 struct sk_buff *skb;
3846 struct net *net = dev_net(idev->dev);
3849 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3853 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3855 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3856 WARN_ON(err == -EMSGSIZE);
3860 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3864 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3867 static inline size_t inet6_prefix_nlmsg_size(void)
3869 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3870 + nla_total_size(sizeof(struct in6_addr))
3871 + nla_total_size(sizeof(struct prefix_cacheinfo));
3874 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3875 struct prefix_info *pinfo, u32 pid, u32 seq,
3876 int event, unsigned int flags)
3878 struct prefixmsg *pmsg;
3879 struct nlmsghdr *nlh;
3880 struct prefix_cacheinfo ci;
3882 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3886 pmsg = nlmsg_data(nlh);
3887 pmsg->prefix_family = AF_INET6;
3888 pmsg->prefix_pad1 = 0;
3889 pmsg->prefix_pad2 = 0;
3890 pmsg->prefix_ifindex = idev->dev->ifindex;
3891 pmsg->prefix_len = pinfo->prefix_len;
3892 pmsg->prefix_type = pinfo->type;
3893 pmsg->prefix_pad3 = 0;
3894 pmsg->prefix_flags = 0;
3896 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3897 if (pinfo->autoconf)
3898 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3900 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3902 ci.preferred_time = ntohl(pinfo->prefered);
3903 ci.valid_time = ntohl(pinfo->valid);
3904 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3906 return nlmsg_end(skb, nlh);
3909 nlmsg_cancel(skb, nlh);
3913 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3914 struct prefix_info *pinfo)
3916 struct sk_buff *skb;
3917 struct net *net = dev_net(idev->dev);
3920 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3924 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3926 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3927 WARN_ON(err == -EMSGSIZE);
3931 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3935 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
3938 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3940 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3945 * If the address was optimistic
3946 * we inserted the route at the start of
3947 * our DAD process, so we don't need
3950 if (!(ifp->rt->rt6i_node))
3951 ip6_ins_rt(ifp->rt);
3952 if (ifp->idev->cnf.forwarding)
3953 addrconf_join_anycast(ifp);
3956 if (ifp->idev->cnf.forwarding)
3957 addrconf_leave_anycast(ifp);
3958 addrconf_leave_solict(ifp->idev, &ifp->addr);
3959 dst_hold(&ifp->rt->u.dst);
3960 if (ip6_del_rt(ifp->rt))
3961 dst_free(&ifp->rt->u.dst);
3966 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3969 if (likely(ifp->idev->dead == 0))
3970 __ipv6_ifa_notify(event, ifp);
3971 rcu_read_unlock_bh();
3974 #ifdef CONFIG_SYSCTL
3977 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3978 void __user *buffer, size_t *lenp, loff_t *ppos)
3980 int *valp = ctl->data;
3984 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3987 ret = addrconf_fixup_forwarding(ctl, valp, val);
3991 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3992 void __user *oldval,
3993 size_t __user *oldlenp,
3994 void __user *newval, size_t newlen)
3996 int *valp = table->data;
4000 if (!newval || !newlen)
4002 if (newlen != sizeof(int))
4004 if (get_user(new, (int __user *)newval))
4008 if (oldval && oldlenp) {
4010 if (get_user(len, oldlenp))
4013 if (len > table->maxlen)
4014 len = table->maxlen;
4015 if (copy_to_user(oldval, valp, len))
4017 if (put_user(len, oldlenp))
4023 return addrconf_fixup_forwarding(table, valp, val);
4026 static struct addrconf_sysctl_table
4028 struct ctl_table_header *sysctl_header;
4029 ctl_table addrconf_vars[DEVCONF_MAX+1];
4031 } addrconf_sysctl __read_mostly = {
4032 .sysctl_header = NULL,
4035 .ctl_name = NET_IPV6_FORWARDING,
4036 .procname = "forwarding",
4037 .data = &ipv6_devconf.forwarding,
4038 .maxlen = sizeof(int),
4040 .proc_handler = addrconf_sysctl_forward,
4041 .strategy = addrconf_sysctl_forward_strategy,
4044 .ctl_name = NET_IPV6_HOP_LIMIT,
4045 .procname = "hop_limit",
4046 .data = &ipv6_devconf.hop_limit,
4047 .maxlen = sizeof(int),
4049 .proc_handler = proc_dointvec,
4052 .ctl_name = NET_IPV6_MTU,
4054 .data = &ipv6_devconf.mtu6,
4055 .maxlen = sizeof(int),
4057 .proc_handler = proc_dointvec,
4060 .ctl_name = NET_IPV6_ACCEPT_RA,
4061 .procname = "accept_ra",
4062 .data = &ipv6_devconf.accept_ra,
4063 .maxlen = sizeof(int),
4065 .proc_handler = proc_dointvec,
4068 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4069 .procname = "accept_redirects",
4070 .data = &ipv6_devconf.accept_redirects,
4071 .maxlen = sizeof(int),
4073 .proc_handler = proc_dointvec,
4076 .ctl_name = NET_IPV6_AUTOCONF,
4077 .procname = "autoconf",
4078 .data = &ipv6_devconf.autoconf,
4079 .maxlen = sizeof(int),
4081 .proc_handler = proc_dointvec,
4084 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4085 .procname = "dad_transmits",
4086 .data = &ipv6_devconf.dad_transmits,
4087 .maxlen = sizeof(int),
4089 .proc_handler = proc_dointvec,
4092 .ctl_name = NET_IPV6_RTR_SOLICITS,
4093 .procname = "router_solicitations",
4094 .data = &ipv6_devconf.rtr_solicits,
4095 .maxlen = sizeof(int),
4097 .proc_handler = proc_dointvec,
4100 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4101 .procname = "router_solicitation_interval",
4102 .data = &ipv6_devconf.rtr_solicit_interval,
4103 .maxlen = sizeof(int),
4105 .proc_handler = proc_dointvec_jiffies,
4106 .strategy = sysctl_jiffies,
4109 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4110 .procname = "router_solicitation_delay",
4111 .data = &ipv6_devconf.rtr_solicit_delay,
4112 .maxlen = sizeof(int),
4114 .proc_handler = proc_dointvec_jiffies,
4115 .strategy = sysctl_jiffies,
4118 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4119 .procname = "force_mld_version",
4120 .data = &ipv6_devconf.force_mld_version,
4121 .maxlen = sizeof(int),
4123 .proc_handler = proc_dointvec,
4125 #ifdef CONFIG_IPV6_PRIVACY
4127 .ctl_name = NET_IPV6_USE_TEMPADDR,
4128 .procname = "use_tempaddr",
4129 .data = &ipv6_devconf.use_tempaddr,
4130 .maxlen = sizeof(int),
4132 .proc_handler = proc_dointvec,
4135 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4136 .procname = "temp_valid_lft",
4137 .data = &ipv6_devconf.temp_valid_lft,
4138 .maxlen = sizeof(int),
4140 .proc_handler = proc_dointvec,
4143 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4144 .procname = "temp_prefered_lft",
4145 .data = &ipv6_devconf.temp_prefered_lft,
4146 .maxlen = sizeof(int),
4148 .proc_handler = proc_dointvec,
4151 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4152 .procname = "regen_max_retry",
4153 .data = &ipv6_devconf.regen_max_retry,
4154 .maxlen = sizeof(int),
4156 .proc_handler = proc_dointvec,
4159 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4160 .procname = "max_desync_factor",
4161 .data = &ipv6_devconf.max_desync_factor,
4162 .maxlen = sizeof(int),
4164 .proc_handler = proc_dointvec,
4168 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4169 .procname = "max_addresses",
4170 .data = &ipv6_devconf.max_addresses,
4171 .maxlen = sizeof(int),
4173 .proc_handler = proc_dointvec,
4176 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4177 .procname = "accept_ra_defrtr",
4178 .data = &ipv6_devconf.accept_ra_defrtr,
4179 .maxlen = sizeof(int),
4181 .proc_handler = proc_dointvec,
4184 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4185 .procname = "accept_ra_pinfo",
4186 .data = &ipv6_devconf.accept_ra_pinfo,
4187 .maxlen = sizeof(int),
4189 .proc_handler = proc_dointvec,
4191 #ifdef CONFIG_IPV6_ROUTER_PREF
4193 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4194 .procname = "accept_ra_rtr_pref",
4195 .data = &ipv6_devconf.accept_ra_rtr_pref,
4196 .maxlen = sizeof(int),
4198 .proc_handler = proc_dointvec,
4201 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4202 .procname = "router_probe_interval",
4203 .data = &ipv6_devconf.rtr_probe_interval,
4204 .maxlen = sizeof(int),
4206 .proc_handler = proc_dointvec_jiffies,
4207 .strategy = sysctl_jiffies,
4209 #ifdef CONFIG_IPV6_ROUTE_INFO
4211 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4212 .procname = "accept_ra_rt_info_max_plen",
4213 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4214 .maxlen = sizeof(int),
4216 .proc_handler = proc_dointvec,
4221 .ctl_name = NET_IPV6_PROXY_NDP,
4222 .procname = "proxy_ndp",
4223 .data = &ipv6_devconf.proxy_ndp,
4224 .maxlen = sizeof(int),
4226 .proc_handler = proc_dointvec,
4229 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4230 .procname = "accept_source_route",
4231 .data = &ipv6_devconf.accept_source_route,
4232 .maxlen = sizeof(int),
4234 .proc_handler = proc_dointvec,
4236 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4238 .ctl_name = CTL_UNNUMBERED,
4239 .procname = "optimistic_dad",
4240 .data = &ipv6_devconf.optimistic_dad,
4241 .maxlen = sizeof(int),
4243 .proc_handler = proc_dointvec,
4247 #ifdef CONFIG_IPV6_MROUTE
4249 .ctl_name = CTL_UNNUMBERED,
4250 .procname = "mc_forwarding",
4251 .data = &ipv6_devconf.mc_forwarding,
4252 .maxlen = sizeof(int),
4254 .proc_handler = proc_dointvec,
4258 .ctl_name = CTL_UNNUMBERED,
4259 .procname = "disable_ipv6",
4260 .data = &ipv6_devconf.disable_ipv6,
4261 .maxlen = sizeof(int),
4263 .proc_handler = proc_dointvec,
4266 .ctl_name = CTL_UNNUMBERED,
4267 .procname = "accept_dad",
4268 .data = &ipv6_devconf.accept_dad,
4269 .maxlen = sizeof(int),
4271 .proc_handler = proc_dointvec,
4274 .ctl_name = 0, /* sentinel */
4279 static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4280 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
4283 struct addrconf_sysctl_table *t;
4285 #define ADDRCONF_CTL_PATH_DEV 3
4287 struct ctl_path addrconf_ctl_path[] = {
4288 { .procname = "net", .ctl_name = CTL_NET, },
4289 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4290 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4291 { /* to be set */ },
4296 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4300 for (i=0; t->addrconf_vars[i].data; i++) {
4301 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4302 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4303 t->addrconf_vars[i].extra2 = net;
4307 * Make a copy of dev_name, because '.procname' is regarded as const
4308 * by sysctl and we wouldn't want anyone to change it under our feet
4309 * (see SIOCSIFNAME).
4311 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4315 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4316 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
4318 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
4320 if (t->sysctl_header == NULL)
4334 static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4336 struct addrconf_sysctl_table *t;
4338 if (p->sysctl == NULL)
4343 unregister_sysctl_table(t->sysctl_header);
4348 static void addrconf_sysctl_register(struct inet6_dev *idev)
4350 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4351 NET_IPV6_NEIGH, "ipv6",
4352 &ndisc_ifinfo_sysctl_change,
4353 ndisc_ifinfo_sysctl_strategy);
4354 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4355 idev->dev->ifindex, idev, &idev->cnf);
4358 static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4360 __addrconf_sysctl_unregister(&idev->cnf);
4361 neigh_sysctl_unregister(idev->nd_parms);
4367 static int addrconf_init_net(struct net *net)
4370 struct ipv6_devconf *all, *dflt;
4373 all = &ipv6_devconf;
4374 dflt = &ipv6_devconf_dflt;
4376 if (net != &init_net) {
4377 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4381 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4383 goto err_alloc_dflt;
4386 net->ipv6.devconf_all = all;
4387 net->ipv6.devconf_dflt = dflt;
4389 #ifdef CONFIG_SYSCTL
4390 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4395 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4402 #ifdef CONFIG_SYSCTL
4404 __addrconf_sysctl_unregister(all);
4414 static void addrconf_exit_net(struct net *net)
4416 #ifdef CONFIG_SYSCTL
4417 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4418 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4420 if (net != &init_net) {
4421 kfree(net->ipv6.devconf_dflt);
4422 kfree(net->ipv6.devconf_all);
4426 static struct pernet_operations addrconf_ops = {
4427 .init = addrconf_init_net,
4428 .exit = addrconf_exit_net,
4435 int register_inet6addr_notifier(struct notifier_block *nb)
4437 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4440 EXPORT_SYMBOL(register_inet6addr_notifier);
4442 int unregister_inet6addr_notifier(struct notifier_block *nb)
4444 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4447 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4450 * Init / cleanup code
4453 int __init addrconf_init(void)
4457 if ((err = ipv6_addr_label_init()) < 0) {
4458 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4463 register_pernet_subsys(&addrconf_ops);
4465 /* The addrconf netdev notifier requires that loopback_dev
4466 * has it's ipv6 private information allocated and setup
4467 * before it can bring up and give link-local addresses
4468 * to other devices which are up.
4470 * Unfortunately, loopback_dev is not necessarily the first
4471 * entry in the global dev_base list of net devices. In fact,
4472 * it is likely to be the very last entry on that list.
4473 * So this causes the notifier registry below to try and
4474 * give link-local addresses to all devices besides loopback_dev
4475 * first, then loopback_dev, which cases all the non-loopback_dev
4476 * devices to fail to get a link-local address.
4478 * So, as a temporary fix, allocate the ipv6 structure for
4479 * loopback_dev first by hand.
4480 * Longer term, all of the dependencies ipv6 has upon the loopback
4481 * device and it being up should be removed.
4484 if (!ipv6_add_dev(init_net.loopback_dev))
4490 register_netdevice_notifier(&ipv6_dev_notf);
4494 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4498 /* Only the first call to __rtnl_register can fail */
4499 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4500 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4501 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4502 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4503 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4505 ipv6_addr_label_rtnl_register();
4509 unregister_netdevice_notifier(&ipv6_dev_notf);
4511 unregister_pernet_subsys(&addrconf_ops);
4516 void addrconf_cleanup(void)
4518 struct inet6_ifaddr *ifa;
4519 struct net_device *dev;
4522 unregister_netdevice_notifier(&ipv6_dev_notf);
4523 unregister_pernet_subsys(&addrconf_ops);
4527 /* clean dev list */
4528 for_each_netdev(&init_net, dev) {
4529 if (__in6_dev_get(dev) == NULL)
4531 addrconf_ifdown(dev, 1);
4533 addrconf_ifdown(init_net.loopback_dev, 2);
4538 write_lock_bh(&addrconf_hash_lock);
4539 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4540 for (ifa=inet6_addr_lst[i]; ifa; ) {
4541 struct inet6_ifaddr *bifa;
4544 ifa = ifa->lst_next;
4545 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4546 /* Do not free it; something is wrong.
4547 Now we can investigate it with debugger.
4551 write_unlock_bh(&addrconf_hash_lock);
4553 del_timer(&addr_chk_timer);