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/kernel.h>
44 #include <linux/socket.h>
45 #include <linux/sockios.h>
46 #include <linux/net.h>
47 #include <linux/in6.h>
48 #include <linux/netdevice.h>
49 #include <linux/if_addr.h>
50 #include <linux/if_arp.h>
51 #include <linux/if_arcnet.h>
52 #include <linux/if_infiniband.h>
53 #include <linux/route.h>
54 #include <linux/inetdevice.h>
55 #include <linux/init.h>
57 #include <linux/sysctl.h>
59 #include <linux/capability.h>
60 #include <linux/delay.h>
61 #include <linux/notifier.h>
62 #include <linux/string.h>
64 #include <net/net_namespace.h>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <net/netlink.h>
76 #include <net/pkt_sched.h>
77 #include <linux/if_tunnel.h>
78 #include <linux/rtnetlink.h>
80 #ifdef CONFIG_IPV6_PRIVACY
81 #include <linux/random.h>
84 #include <asm/uaccess.h>
85 #include <asm/unaligned.h>
87 #include <linux/proc_fs.h>
88 #include <linux/seq_file.h>
90 /* Set to 3 to get tracing... */
94 #define ADBG(x) printk x
99 #define INFINITY_LIFE_TIME 0xFFFFFFFF
100 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
103 static void addrconf_sysctl_register(struct inet6_dev *idev);
104 static void addrconf_sysctl_unregister(struct inet6_dev *idev);
106 static inline void addrconf_sysctl_register(struct inet6_dev *idev)
110 static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
115 #ifdef CONFIG_IPV6_PRIVACY
116 static int __ipv6_regen_rndid(struct inet6_dev *idev);
117 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
118 static void ipv6_regen_rndid(unsigned long data);
120 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
123 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
124 static int ipv6_count_addresses(struct inet6_dev *idev);
127 * Configured unicast address hash table
129 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130 static DEFINE_RWLOCK(addrconf_hash_lock);
132 static void addrconf_verify(unsigned long);
134 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
135 static DEFINE_SPINLOCK(addrconf_verify_lock);
137 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
140 static int addrconf_ifdown(struct net_device *dev, int how);
142 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
143 static void addrconf_dad_timer(unsigned long data);
144 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
145 static void addrconf_dad_run(struct inet6_dev *idev);
146 static void addrconf_rs_timer(unsigned long data);
147 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
150 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
151 struct prefix_info *pinfo);
152 static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
153 struct net_device *dev);
155 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
157 static struct ipv6_devconf ipv6_devconf __read_mostly = {
159 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
160 .mtu6 = IPV6_MIN_MTU,
162 .accept_redirects = 1,
164 .force_mld_version = 0,
166 .rtr_solicits = MAX_RTR_SOLICITATIONS,
167 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
168 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
169 #ifdef CONFIG_IPV6_PRIVACY
171 .temp_valid_lft = TEMP_VALID_LIFETIME,
172 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
173 .regen_max_retry = REGEN_MAX_RETRY,
174 .max_desync_factor = MAX_DESYNC_FACTOR,
176 .max_addresses = IPV6_MAX_ADDRESSES,
177 .accept_ra_defrtr = 1,
178 .accept_ra_pinfo = 1,
179 #ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref = 1,
181 .rtr_probe_interval = 60 * HZ,
182 #ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen = 0,
187 .accept_source_route = 0, /* we do not accept RH0 by default. */
192 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
194 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
195 .mtu6 = IPV6_MIN_MTU,
197 .accept_redirects = 1,
200 .rtr_solicits = MAX_RTR_SOLICITATIONS,
201 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
202 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
203 #ifdef CONFIG_IPV6_PRIVACY
205 .temp_valid_lft = TEMP_VALID_LIFETIME,
206 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
207 .regen_max_retry = REGEN_MAX_RETRY,
208 .max_desync_factor = MAX_DESYNC_FACTOR,
210 .max_addresses = IPV6_MAX_ADDRESSES,
211 .accept_ra_defrtr = 1,
212 .accept_ra_pinfo = 1,
213 #ifdef CONFIG_IPV6_ROUTER_PREF
214 .accept_ra_rtr_pref = 1,
215 .rtr_probe_interval = 60 * HZ,
216 #ifdef CONFIG_IPV6_ROUTE_INFO
217 .accept_ra_rt_info_max_plen = 0,
221 .accept_source_route = 0, /* we do not accept RH0 by default. */
226 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
227 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
228 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
229 const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
230 const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
232 /* Check if a valid qdisc is available */
233 static inline bool addrconf_qdisc_ok(const struct net_device *dev)
235 return !qdisc_tx_is_noop(dev);
238 /* Check if a route is valid prefix route */
239 static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
241 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
244 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
246 if (del_timer(&ifp->timer))
250 enum addrconf_timer_t
257 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
258 enum addrconf_timer_t what,
261 if (!del_timer(&ifp->timer))
266 ifp->timer.function = addrconf_dad_timer;
269 ifp->timer.function = addrconf_rs_timer;
273 ifp->timer.expires = jiffies + when;
274 add_timer(&ifp->timer);
277 static int snmp6_alloc_dev(struct inet6_dev *idev)
279 if (snmp_mib_init((void **)idev->stats.ipv6,
280 sizeof(struct ipstats_mib)) < 0)
282 if (snmp_mib_init((void **)idev->stats.icmpv6,
283 sizeof(struct icmpv6_mib)) < 0)
285 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
286 sizeof(struct icmpv6msg_mib)) < 0)
292 snmp_mib_free((void **)idev->stats.icmpv6);
294 snmp_mib_free((void **)idev->stats.ipv6);
299 static void snmp6_free_dev(struct inet6_dev *idev)
301 snmp_mib_free((void **)idev->stats.icmpv6msg);
302 snmp_mib_free((void **)idev->stats.icmpv6);
303 snmp_mib_free((void **)idev->stats.ipv6);
306 /* Nobody refers to this device, we may destroy it. */
308 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
310 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
314 void in6_dev_finish_destroy(struct inet6_dev *idev)
316 struct net_device *dev = idev->dev;
318 WARN_ON(idev->addr_list != NULL);
319 WARN_ON(idev->mc_list != NULL);
321 #ifdef NET_REFCNT_DEBUG
322 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
326 printk("Freeing alive inet6 device %p\n", idev);
329 snmp6_free_dev(idev);
330 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
333 EXPORT_SYMBOL(in6_dev_finish_destroy);
335 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
337 struct inet6_dev *ndev;
341 if (dev->mtu < IPV6_MIN_MTU)
344 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
349 rwlock_init(&ndev->lock);
351 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
352 ndev->cnf.mtu6 = dev->mtu;
353 ndev->cnf.sysctl = NULL;
354 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
355 if (ndev->nd_parms == NULL) {
359 if (ndev->cnf.forwarding)
360 dev_disable_lro(dev);
361 /* We refer to the device */
364 if (snmp6_alloc_dev(ndev) < 0) {
366 "%s(): cannot allocate memory for statistics; dev=%s.\n",
367 __func__, dev->name));
368 neigh_parms_release(&nd_tbl, ndev->nd_parms);
370 in6_dev_finish_destroy(ndev);
374 if (snmp6_register_dev(ndev) < 0) {
376 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
377 __func__, dev->name));
378 neigh_parms_release(&nd_tbl, ndev->nd_parms);
380 in6_dev_finish_destroy(ndev);
384 /* One reference from device. We must do this before
385 * we invoke __ipv6_regen_rndid().
389 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
390 ndev->cnf.accept_dad = -1;
392 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
393 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
395 "%s: Disabled Multicast RS\n",
397 ndev->cnf.rtr_solicits = 0;
401 #ifdef CONFIG_IPV6_PRIVACY
402 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
403 if ((dev->flags&IFF_LOOPBACK) ||
404 dev->type == ARPHRD_TUNNEL ||
405 dev->type == ARPHRD_TUNNEL6 ||
406 dev->type == ARPHRD_SIT ||
407 dev->type == ARPHRD_NONE) {
409 "%s: Disabled Privacy Extensions\n",
411 ndev->cnf.use_tempaddr = -1;
414 ipv6_regen_rndid((unsigned long) ndev);
418 if (netif_running(dev) && addrconf_qdisc_ok(dev))
419 ndev->if_flags |= IF_READY;
421 ipv6_mc_init_dev(ndev);
422 ndev->tstamp = jiffies;
423 addrconf_sysctl_register(ndev);
424 /* protected by rtnl_lock */
425 rcu_assign_pointer(dev->ip6_ptr, ndev);
427 /* Join all-node multicast group */
428 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
433 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
435 struct inet6_dev *idev;
439 if ((idev = __in6_dev_get(dev)) == NULL) {
440 if ((idev = ipv6_add_dev(dev)) == NULL)
444 if (dev->flags&IFF_UP)
450 static void dev_forward_change(struct inet6_dev *idev)
452 struct net_device *dev;
453 struct inet6_ifaddr *ifa;
458 if (idev->cnf.forwarding)
459 dev_disable_lro(dev);
460 if (dev && (dev->flags & IFF_MULTICAST)) {
461 if (idev->cnf.forwarding)
462 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
464 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
466 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
467 if (ifa->flags&IFA_F_TENTATIVE)
469 if (idev->cnf.forwarding)
470 addrconf_join_anycast(ifa);
472 addrconf_leave_anycast(ifa);
477 static void addrconf_forward_change(struct net *net, __s32 newf)
479 struct net_device *dev;
480 struct inet6_dev *idev;
482 read_lock(&dev_base_lock);
483 for_each_netdev(net, dev) {
485 idev = __in6_dev_get(dev);
487 int changed = (!idev->cnf.forwarding) ^ (!newf);
488 idev->cnf.forwarding = newf;
490 dev_forward_change(idev);
494 read_unlock(&dev_base_lock);
497 static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
501 net = (struct net *)table->extra2;
502 if (p == &net->ipv6.devconf_dflt->forwarding)
508 if (p == &net->ipv6.devconf_all->forwarding) {
509 __s32 newf = net->ipv6.devconf_all->forwarding;
510 net->ipv6.devconf_dflt->forwarding = newf;
511 addrconf_forward_change(net, newf);
512 } else if ((!*p) ^ (!old))
513 dev_forward_change((struct inet6_dev *)table->extra1);
517 rt6_purge_dflt_routers(net);
522 /* Nobody refers to this ifaddr, destroy it */
524 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
526 WARN_ON(ifp->if_next != NULL);
527 WARN_ON(ifp->lst_next != NULL);
529 #ifdef NET_REFCNT_DEBUG
530 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
533 in6_dev_put(ifp->idev);
535 if (del_timer(&ifp->timer))
536 printk("Timer is still running, when freeing ifa=%p\n", ifp);
539 printk("Freeing alive inet6 address %p\n", ifp);
542 dst_release(&ifp->rt->u.dst);
548 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
550 struct inet6_ifaddr *ifa, **ifap;
551 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
554 * Each device address list is sorted in order of scope -
555 * global before linklocal.
557 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
558 ifap = &ifa->if_next) {
559 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
563 ifp->if_next = *ifap;
568 * Hash function taken from net_alias.c
570 static u8 ipv6_addr_hash(const struct in6_addr *addr)
575 * We perform the hash function over the last 64 bits of the address
576 * This will include the IEEE address token on links that support it.
579 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
580 word ^= (word >> 16);
583 return ((word ^ (word >> 4)) & 0x0f);
586 /* On success it returns ifp with increased reference count */
588 static struct inet6_ifaddr *
589 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
590 int scope, u32 flags)
592 struct inet6_ifaddr *ifa = NULL;
594 struct net *net = dev_net(idev->dev);
597 int addr_type = ipv6_addr_type(addr);
599 if (addr_type == IPV6_ADDR_ANY ||
600 addr_type & IPV6_ADDR_MULTICAST ||
601 (!(idev->dev->flags & IFF_LOOPBACK) &&
602 addr_type & IPV6_ADDR_LOOPBACK))
603 return ERR_PTR(-EADDRNOTAVAIL);
607 err = -ENODEV; /*XXX*/
611 if (idev->cnf.disable_ipv6 || net->ipv6.devconf_all->disable_ipv6) {
616 write_lock(&addrconf_hash_lock);
618 /* Ignore adding duplicate addresses on an interface */
619 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
620 ADBG(("ipv6_add_addr: already assigned\n"));
625 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
628 ADBG(("ipv6_add_addr: malloc failed\n"));
633 rt = addrconf_dst_alloc(idev, addr, 0);
639 ipv6_addr_copy(&ifa->addr, addr);
641 spin_lock_init(&ifa->lock);
642 init_timer(&ifa->timer);
643 ifa->timer.data = (unsigned long) ifa;
645 ifa->prefix_len = pfxlen;
646 ifa->flags = flags | IFA_F_TENTATIVE;
647 ifa->cstamp = ifa->tstamp = jiffies;
652 * part one of RFC 4429, section 3.3
653 * We should not configure an address as
654 * optimistic if we do not yet know the link
655 * layer address of our nexhop router
658 if (rt->rt6i_nexthop == NULL)
659 ifa->flags &= ~IFA_F_OPTIMISTIC;
666 /* Add to big hash table */
667 hash = ipv6_addr_hash(addr);
669 ifa->lst_next = inet6_addr_lst[hash];
670 inet6_addr_lst[hash] = ifa;
672 write_unlock(&addrconf_hash_lock);
674 write_lock(&idev->lock);
675 /* Add to inet6_dev unicast addr list. */
676 ipv6_link_dev_addr(idev, ifa);
678 #ifdef CONFIG_IPV6_PRIVACY
679 if (ifa->flags&IFA_F_TEMPORARY) {
680 ifa->tmp_next = idev->tempaddr_list;
681 idev->tempaddr_list = ifa;
687 write_unlock(&idev->lock);
689 rcu_read_unlock_bh();
691 if (likely(err == 0))
692 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
700 write_unlock(&addrconf_hash_lock);
704 /* This function wants to get referenced ifp and releases it before return */
706 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
708 struct inet6_ifaddr *ifa, **ifap;
709 struct inet6_dev *idev = ifp->idev;
711 int deleted = 0, onlink = 0;
712 unsigned long expires = jiffies;
714 hash = ipv6_addr_hash(&ifp->addr);
718 write_lock_bh(&addrconf_hash_lock);
719 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
720 ifap = &ifa->lst_next) {
722 *ifap = ifa->lst_next;
724 ifa->lst_next = NULL;
728 write_unlock_bh(&addrconf_hash_lock);
730 write_lock_bh(&idev->lock);
731 #ifdef CONFIG_IPV6_PRIVACY
732 if (ifp->flags&IFA_F_TEMPORARY) {
733 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
734 ifap = &ifa->tmp_next) {
736 *ifap = ifa->tmp_next;
738 in6_ifa_put(ifp->ifpub);
742 ifa->tmp_next = NULL;
749 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
751 *ifap = ifa->if_next;
754 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
758 } else if (ifp->flags & IFA_F_PERMANENT) {
759 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
761 if (ifa->flags & IFA_F_PERMANENT) {
766 unsigned long lifetime;
771 spin_lock(&ifa->lock);
773 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
775 * Note: Because this address is
776 * not permanent, lifetime <
777 * LONG_MAX / HZ here.
779 if (time_before(expires,
780 ifa->tstamp + lifetime * HZ))
781 expires = ifa->tstamp + lifetime * HZ;
782 spin_unlock(&ifa->lock);
786 ifap = &ifa->if_next;
788 write_unlock_bh(&idev->lock);
790 addrconf_del_timer(ifp);
792 ipv6_ifa_notify(RTM_DELADDR, ifp);
794 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
797 * Purge or update corresponding prefix
799 * 1) we don't purge prefix here if address was not permanent.
800 * prefix is managed by its own lifetime.
801 * 2) if there're no addresses, delete prefix.
802 * 3) if there're still other permanent address(es),
803 * corresponding prefix is still permanent.
804 * 4) otherwise, update prefix lifetime to the
805 * longest valid lifetime among the corresponding
806 * addresses on the device.
807 * Note: subsequent RA will update lifetime.
811 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
812 struct in6_addr prefix;
814 struct net *net = dev_net(ifp->idev->dev);
815 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
816 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
818 if (rt && addrconf_is_prefix_route(rt)) {
822 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
823 rt->rt6i_expires = expires;
824 rt->rt6i_flags |= RTF_EXPIRES;
827 dst_release(&rt->u.dst);
833 #ifdef CONFIG_IPV6_PRIVACY
834 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
836 struct inet6_dev *idev = ifp->idev;
837 struct in6_addr addr, *tmpaddr;
838 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
839 unsigned long regen_advance;
845 write_lock(&idev->lock);
847 spin_lock_bh(&ift->lock);
848 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
849 spin_unlock_bh(&ift->lock);
856 if (idev->cnf.use_tempaddr <= 0) {
857 write_unlock(&idev->lock);
859 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
864 spin_lock_bh(&ifp->lock);
865 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
866 idev->cnf.use_tempaddr = -1; /*XXX*/
867 spin_unlock_bh(&ifp->lock);
868 write_unlock(&idev->lock);
870 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
876 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
877 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
878 spin_unlock_bh(&ifp->lock);
879 write_unlock(&idev->lock);
881 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
887 memcpy(&addr.s6_addr[8], idev->rndid, 8);
888 tmp_valid_lft = min_t(__u32,
890 idev->cnf.temp_valid_lft);
891 tmp_prefered_lft = min_t(__u32,
893 idev->cnf.temp_prefered_lft - desync_factor / HZ);
894 tmp_plen = ifp->prefix_len;
895 max_addresses = idev->cnf.max_addresses;
896 tmp_cstamp = ifp->cstamp;
897 tmp_tstamp = ifp->tstamp;
898 spin_unlock_bh(&ifp->lock);
900 regen_advance = idev->cnf.regen_max_retry *
901 idev->cnf.dad_transmits *
902 idev->nd_parms->retrans_time / HZ;
903 write_unlock(&idev->lock);
905 /* A temporary address is created only if this calculated Preferred
906 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
907 * an implementation must not create a temporary address with a zero
908 * Preferred Lifetime.
910 if (tmp_prefered_lft <= regen_advance) {
917 addr_flags = IFA_F_TEMPORARY;
918 /* set in addrconf_prefix_rcv() */
919 if (ifp->flags & IFA_F_OPTIMISTIC)
920 addr_flags |= IFA_F_OPTIMISTIC;
922 ift = !max_addresses ||
923 ipv6_count_addresses(idev) < max_addresses ?
924 ipv6_add_addr(idev, &addr, tmp_plen,
925 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
927 if (!ift || IS_ERR(ift)) {
931 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
933 write_lock(&idev->lock);
937 spin_lock_bh(&ift->lock);
939 ift->valid_lft = tmp_valid_lft;
940 ift->prefered_lft = tmp_prefered_lft;
941 ift->cstamp = tmp_cstamp;
942 ift->tstamp = tmp_tstamp;
943 spin_unlock_bh(&ift->lock);
945 addrconf_dad_start(ift, 0);
954 * Choose an appropriate source address (RFC3484)
957 IPV6_SADDR_RULE_INIT = 0,
958 IPV6_SADDR_RULE_LOCAL,
959 IPV6_SADDR_RULE_SCOPE,
960 IPV6_SADDR_RULE_PREFERRED,
961 #ifdef CONFIG_IPV6_MIP6
965 IPV6_SADDR_RULE_LABEL,
966 #ifdef CONFIG_IPV6_PRIVACY
967 IPV6_SADDR_RULE_PRIVACY,
969 IPV6_SADDR_RULE_ORCHID,
970 IPV6_SADDR_RULE_PREFIX,
974 struct ipv6_saddr_score {
977 struct inet6_ifaddr *ifa;
978 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
983 struct ipv6_saddr_dst {
984 const struct in6_addr *addr;
991 static inline int ipv6_saddr_preferred(int type)
993 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
994 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
999 static int ipv6_get_saddr_eval(struct net *net,
1000 struct ipv6_saddr_score *score,
1001 struct ipv6_saddr_dst *dst,
1006 if (i <= score->rule) {
1008 case IPV6_SADDR_RULE_SCOPE:
1009 ret = score->scopedist;
1011 case IPV6_SADDR_RULE_PREFIX:
1012 ret = score->matchlen;
1015 ret = !!test_bit(i, score->scorebits);
1021 case IPV6_SADDR_RULE_INIT:
1022 /* Rule 0: remember if hiscore is not ready yet */
1025 case IPV6_SADDR_RULE_LOCAL:
1026 /* Rule 1: Prefer same address */
1027 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1029 case IPV6_SADDR_RULE_SCOPE:
1030 /* Rule 2: Prefer appropriate scope
1035 * ---+--+-+---> scope
1037 * | d is scope of the destination.
1039 * | \ <- smaller scope is better if
1040 * B-15 | \ if scope is enough for destinaion.
1041 * | ret = B - scope (-1 <= scope >= d <= 15).
1043 * |/ <- greater is better
1044 * -C / if scope is not enough for destination.
1045 * /| ret = scope - C (-1 <= d < scope <= 15).
1047 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1048 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1049 * Assume B = 0 and we get C > 29.
1051 ret = __ipv6_addr_src_scope(score->addr_type);
1052 if (ret >= dst->scope)
1055 ret -= 128; /* 30 is enough */
1056 score->scopedist = ret;
1058 case IPV6_SADDR_RULE_PREFERRED:
1059 /* Rule 3: Avoid deprecated and optimistic addresses */
1060 ret = ipv6_saddr_preferred(score->addr_type) ||
1061 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1063 #ifdef CONFIG_IPV6_MIP6
1064 case IPV6_SADDR_RULE_HOA:
1066 /* Rule 4: Prefer home address */
1067 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1068 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1072 case IPV6_SADDR_RULE_OIF:
1073 /* Rule 5: Prefer outgoing interface */
1074 ret = (!dst->ifindex ||
1075 dst->ifindex == score->ifa->idev->dev->ifindex);
1077 case IPV6_SADDR_RULE_LABEL:
1078 /* Rule 6: Prefer matching label */
1079 ret = ipv6_addr_label(net,
1080 &score->ifa->addr, score->addr_type,
1081 score->ifa->idev->dev->ifindex) == dst->label;
1083 #ifdef CONFIG_IPV6_PRIVACY
1084 case IPV6_SADDR_RULE_PRIVACY:
1086 /* Rule 7: Prefer public address
1087 * Note: prefer temprary address if use_tempaddr >= 2
1089 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1090 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1091 score->ifa->idev->cnf.use_tempaddr >= 2;
1092 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1096 case IPV6_SADDR_RULE_ORCHID:
1097 /* Rule 8-: Prefer ORCHID vs ORCHID or
1098 * non-ORCHID vs non-ORCHID
1100 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1101 ipv6_addr_orchid(dst->addr));
1103 case IPV6_SADDR_RULE_PREFIX:
1104 /* Rule 8: Use longest matching prefix */
1105 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1113 __set_bit(i, score->scorebits);
1119 int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
1120 const struct in6_addr *daddr, unsigned int prefs,
1121 struct in6_addr *saddr)
1123 struct ipv6_saddr_score scores[2],
1124 *score = &scores[0], *hiscore = &scores[1];
1125 struct ipv6_saddr_dst dst;
1126 struct net_device *dev;
1129 dst_type = __ipv6_addr_type(daddr);
1131 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1132 dst.scope = __ipv6_addr_src_scope(dst_type);
1133 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
1137 hiscore->ifa = NULL;
1139 read_lock(&dev_base_lock);
1142 for_each_netdev(net, dev) {
1143 struct inet6_dev *idev;
1145 /* Candidate Source Address (section 4)
1146 * - multicast and link-local destination address,
1147 * the set of candidate source address MUST only
1148 * include addresses assigned to interfaces
1149 * belonging to the same link as the outgoing
1151 * (- For site-local destination addresses, the
1152 * set of candidate source addresses MUST only
1153 * include addresses assigned to interfaces
1154 * belonging to the same site as the outgoing
1157 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1158 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1159 dst.ifindex && dev->ifindex != dst.ifindex)
1162 idev = __in6_dev_get(dev);
1166 read_lock_bh(&idev->lock);
1167 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1171 * - Tentative Address (RFC2462 section 5.4)
1172 * - A tentative address is not considered
1173 * "assigned to an interface" in the traditional
1174 * sense, unless it is also flagged as optimistic.
1175 * - Candidate Source Address (section 4)
1176 * - In any case, anycast addresses, multicast
1177 * addresses, and the unspecified address MUST
1178 * NOT be included in a candidate set.
1180 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1181 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1184 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1186 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1187 score->addr_type & IPV6_ADDR_MULTICAST)) {
1188 LIMIT_NETDEBUG(KERN_DEBUG
1189 "ADDRCONF: unspecified / multicast address "
1190 "assigned as unicast address on %s",
1196 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1198 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1199 int minihiscore, miniscore;
1201 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1202 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
1204 if (minihiscore > miniscore) {
1205 if (i == IPV6_SADDR_RULE_SCOPE &&
1206 score->scopedist > 0) {
1209 * each remaining entry
1210 * has too small (not enough)
1211 * scope, because ifa entries
1212 * are sorted by their scope
1218 } else if (minihiscore < miniscore) {
1220 in6_ifa_put(hiscore->ifa);
1222 in6_ifa_hold(score->ifa);
1224 swap(hiscore, score);
1226 /* restore our iterator */
1227 score->ifa = hiscore->ifa;
1234 read_unlock_bh(&idev->lock);
1237 read_unlock(&dev_base_lock);
1240 return -EADDRNOTAVAIL;
1242 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1243 in6_ifa_put(hiscore->ifa);
1247 EXPORT_SYMBOL(ipv6_dev_get_saddr);
1249 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1250 unsigned char banned_flags)
1252 struct inet6_dev *idev;
1253 int err = -EADDRNOTAVAIL;
1256 if ((idev = __in6_dev_get(dev)) != NULL) {
1257 struct inet6_ifaddr *ifp;
1259 read_lock_bh(&idev->lock);
1260 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1261 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1262 ipv6_addr_copy(addr, &ifp->addr);
1267 read_unlock_bh(&idev->lock);
1273 static int ipv6_count_addresses(struct inet6_dev *idev)
1276 struct inet6_ifaddr *ifp;
1278 read_lock_bh(&idev->lock);
1279 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1281 read_unlock_bh(&idev->lock);
1285 int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1286 struct net_device *dev, int strict)
1288 struct inet6_ifaddr * ifp;
1289 u8 hash = ipv6_addr_hash(addr);
1291 read_lock_bh(&addrconf_hash_lock);
1292 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1293 if (!net_eq(dev_net(ifp->idev->dev), net))
1295 if (ipv6_addr_equal(&ifp->addr, addr) &&
1296 !(ifp->flags&IFA_F_TENTATIVE)) {
1297 if (dev == NULL || ifp->idev->dev == dev ||
1298 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1302 read_unlock_bh(&addrconf_hash_lock);
1305 EXPORT_SYMBOL(ipv6_chk_addr);
1308 int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1309 struct net_device *dev)
1311 struct inet6_ifaddr * ifp;
1312 u8 hash = ipv6_addr_hash(addr);
1314 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1315 if (!net_eq(dev_net(ifp->idev->dev), net))
1317 if (ipv6_addr_equal(&ifp->addr, addr)) {
1318 if (dev == NULL || ifp->idev->dev == dev)
1325 int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1327 struct inet6_dev *idev;
1328 struct inet6_ifaddr *ifa;
1333 idev = __in6_dev_get(dev);
1335 read_lock_bh(&idev->lock);
1336 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1337 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1342 read_unlock_bh(&idev->lock);
1348 EXPORT_SYMBOL(ipv6_chk_prefix);
1350 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1351 struct net_device *dev, int strict)
1353 struct inet6_ifaddr * ifp;
1354 u8 hash = ipv6_addr_hash(addr);
1356 read_lock_bh(&addrconf_hash_lock);
1357 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1358 if (!net_eq(dev_net(ifp->idev->dev), net))
1360 if (ipv6_addr_equal(&ifp->addr, addr)) {
1361 if (dev == NULL || ifp->idev->dev == dev ||
1362 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1368 read_unlock_bh(&addrconf_hash_lock);
1373 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1375 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1376 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1377 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1378 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1379 int sk_ipv6only = ipv6_only_sock(sk);
1380 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1381 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1382 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1384 if (!sk2_rcv_saddr && !sk_ipv6only)
1387 if (addr_type2 == IPV6_ADDR_ANY &&
1388 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1391 if (addr_type == IPV6_ADDR_ANY &&
1392 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1395 if (sk2_rcv_saddr6 &&
1396 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1399 if (addr_type == IPV6_ADDR_MAPPED &&
1401 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1407 /* Gets referenced address, destroys ifaddr */
1409 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1411 if (ifp->flags&IFA_F_PERMANENT) {
1412 spin_lock_bh(&ifp->lock);
1413 addrconf_del_timer(ifp);
1414 ifp->flags |= IFA_F_TENTATIVE;
1415 spin_unlock_bh(&ifp->lock);
1417 #ifdef CONFIG_IPV6_PRIVACY
1418 } else if (ifp->flags&IFA_F_TEMPORARY) {
1419 struct inet6_ifaddr *ifpub;
1420 spin_lock_bh(&ifp->lock);
1423 in6_ifa_hold(ifpub);
1424 spin_unlock_bh(&ifp->lock);
1425 ipv6_create_tempaddr(ifpub, ifp);
1428 spin_unlock_bh(&ifp->lock);
1436 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1438 struct inet6_dev *idev = ifp->idev;
1440 if (net_ratelimit())
1441 printk(KERN_INFO "%s: IPv6 duplicate address detected!\n",
1442 ifp->idev->dev->name);
1444 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1445 struct in6_addr addr;
1447 addr.s6_addr32[0] = htonl(0xfe800000);
1448 addr.s6_addr32[1] = 0;
1450 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1451 ipv6_addr_equal(&ifp->addr, &addr)) {
1452 /* DAD failed for link-local based on MAC address */
1453 idev->cnf.disable_ipv6 = 1;
1455 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1456 ifp->idev->dev->name);
1460 addrconf_dad_stop(ifp);
1463 /* Join to solicited addr multicast group. */
1465 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1467 struct in6_addr maddr;
1469 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1472 addrconf_addr_solict_mult(addr, &maddr);
1473 ipv6_dev_mc_inc(dev, &maddr);
1476 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1478 struct in6_addr maddr;
1480 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1483 addrconf_addr_solict_mult(addr, &maddr);
1484 __ipv6_dev_mc_dec(idev, &maddr);
1487 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1489 struct in6_addr addr;
1490 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1491 if (ipv6_addr_any(&addr))
1493 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1496 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1498 struct in6_addr addr;
1499 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1500 if (ipv6_addr_any(&addr))
1502 __ipv6_dev_ac_dec(ifp->idev, &addr);
1505 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1507 if (dev->addr_len != ETH_ALEN)
1509 memcpy(eui, dev->dev_addr, 3);
1510 memcpy(eui + 5, dev->dev_addr + 3, 3);
1513 * The zSeries OSA network cards can be shared among various
1514 * OS instances, but the OSA cards have only one MAC address.
1515 * This leads to duplicate address conflicts in conjunction
1516 * with IPv6 if more than one instance uses the same card.
1518 * The driver for these cards can deliver a unique 16-bit
1519 * identifier for each instance sharing the same card. It is
1520 * placed instead of 0xFFFE in the interface identifier. The
1521 * "u" bit of the interface identifier is not inverted in this
1522 * case. Hence the resulting interface identifier has local
1523 * scope according to RFC2373.
1526 eui[3] = (dev->dev_id >> 8) & 0xFF;
1527 eui[4] = dev->dev_id & 0xFF;
1536 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1538 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1539 if (dev->addr_len != ARCNET_ALEN)
1542 eui[7] = *(u8*)dev->dev_addr;
1546 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1548 if (dev->addr_len != INFINIBAND_ALEN)
1550 memcpy(eui, dev->dev_addr + 12, 8);
1555 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1557 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1558 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1559 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1560 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1561 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1562 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1566 memcpy(eui + 4, &addr, 4);
1569 EXPORT_SYMBOL(__ipv6_isatap_ifid);
1571 static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1573 if (dev->priv_flags & IFF_ISATAP)
1574 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1578 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1580 switch (dev->type) {
1583 case ARPHRD_IEEE802_TR:
1584 return addrconf_ifid_eui48(eui, dev);
1586 return addrconf_ifid_arcnet(eui, dev);
1587 case ARPHRD_INFINIBAND:
1588 return addrconf_ifid_infiniband(eui, dev);
1590 return addrconf_ifid_sit(eui, dev);
1595 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1598 struct inet6_ifaddr *ifp;
1600 read_lock_bh(&idev->lock);
1601 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1602 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1603 memcpy(eui, ifp->addr.s6_addr+8, 8);
1608 read_unlock_bh(&idev->lock);
1612 #ifdef CONFIG_IPV6_PRIVACY
1613 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1614 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1617 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1618 idev->rndid[0] &= ~0x02;
1621 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1622 * check if generated address is not inappropriate
1624 * - Reserved subnet anycast (RFC 2526)
1625 * 11111101 11....11 1xxxxxxx
1626 * - ISATAP (RFC4214) 6.1
1627 * 00-00-5E-FE-xx-xx-xx-xx
1629 * - XXX: already assigned to an address on the device
1631 if (idev->rndid[0] == 0xfd &&
1632 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1633 (idev->rndid[7]&0x80))
1635 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1636 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1638 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1645 static void ipv6_regen_rndid(unsigned long data)
1647 struct inet6_dev *idev = (struct inet6_dev *) data;
1648 unsigned long expires;
1651 write_lock_bh(&idev->lock);
1656 if (__ipv6_regen_rndid(idev) < 0)
1660 idev->cnf.temp_prefered_lft * HZ -
1661 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1662 if (time_before(expires, jiffies)) {
1664 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1669 if (!mod_timer(&idev->regen_timer, expires))
1673 write_unlock_bh(&idev->lock);
1674 rcu_read_unlock_bh();
1678 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1681 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1682 ret = __ipv6_regen_rndid(idev);
1692 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1693 unsigned long expires, u32 flags)
1695 struct fib6_config cfg = {
1696 .fc_table = RT6_TABLE_PREFIX,
1697 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1698 .fc_ifindex = dev->ifindex,
1699 .fc_expires = expires,
1701 .fc_flags = RTF_UP | flags,
1702 .fc_nlinfo.nl_net = dev_net(dev),
1703 .fc_protocol = RTPROT_KERNEL,
1706 ipv6_addr_copy(&cfg.fc_dst, pfx);
1708 /* Prevent useless cloning on PtP SIT.
1709 This thing is done here expecting that the whole
1710 class of non-broadcast devices need not cloning.
1712 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1713 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1714 cfg.fc_flags |= RTF_NONEXTHOP;
1717 ip6_route_add(&cfg);
1720 /* Create "default" multicast route to the interface */
1722 static void addrconf_add_mroute(struct net_device *dev)
1724 struct fib6_config cfg = {
1725 .fc_table = RT6_TABLE_LOCAL,
1726 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1727 .fc_ifindex = dev->ifindex,
1730 .fc_nlinfo.nl_net = dev_net(dev),
1733 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1735 ip6_route_add(&cfg);
1738 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1739 static void sit_route_add(struct net_device *dev)
1741 struct fib6_config cfg = {
1742 .fc_table = RT6_TABLE_MAIN,
1743 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1744 .fc_ifindex = dev->ifindex,
1746 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1747 .fc_nlinfo.nl_net = dev_net(dev),
1750 /* prefix length - 96 bits "::d.d.d.d" */
1751 ip6_route_add(&cfg);
1755 static void addrconf_add_lroute(struct net_device *dev)
1757 struct in6_addr addr;
1759 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1760 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1763 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1765 struct inet6_dev *idev;
1769 if ((idev = ipv6_find_idev(dev)) == NULL)
1772 /* Add default multicast route */
1773 addrconf_add_mroute(dev);
1775 /* Add link local route */
1776 addrconf_add_lroute(dev);
1780 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1782 struct prefix_info *pinfo;
1786 struct inet6_dev *in6_dev;
1788 pinfo = (struct prefix_info *) opt;
1790 if (len < sizeof(struct prefix_info)) {
1791 ADBG(("addrconf: prefix option too short\n"));
1796 * Validation checks ([ADDRCONF], page 19)
1799 addr_type = ipv6_addr_type(&pinfo->prefix);
1801 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1804 valid_lft = ntohl(pinfo->valid);
1805 prefered_lft = ntohl(pinfo->prefered);
1807 if (prefered_lft > valid_lft) {
1808 if (net_ratelimit())
1809 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1813 in6_dev = in6_dev_get(dev);
1815 if (in6_dev == NULL) {
1816 if (net_ratelimit())
1817 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1822 * Two things going on here:
1823 * 1) Add routes for on-link prefixes
1824 * 2) Configure prefixes with the auto flag set
1827 if (pinfo->onlink) {
1828 struct rt6_info *rt;
1829 unsigned long rt_expires;
1831 /* Avoid arithmetic overflow. Really, we could
1832 * save rt_expires in seconds, likely valid_lft,
1833 * but it would require division in fib gc, that it
1837 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1839 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
1841 if (addrconf_finite_timeout(rt_expires))
1844 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
1847 if (rt && addrconf_is_prefix_route(rt)) {
1848 /* Autoconf prefix route */
1849 if (valid_lft == 0) {
1852 } else if (addrconf_finite_timeout(rt_expires)) {
1854 rt->rt6i_expires = jiffies + rt_expires;
1855 rt->rt6i_flags |= RTF_EXPIRES;
1857 rt->rt6i_flags &= ~RTF_EXPIRES;
1858 rt->rt6i_expires = 0;
1860 } else if (valid_lft) {
1861 clock_t expires = 0;
1862 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1863 if (addrconf_finite_timeout(rt_expires)) {
1865 flags |= RTF_EXPIRES;
1866 expires = jiffies_to_clock_t(rt_expires);
1868 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1869 dev, expires, flags);
1872 dst_release(&rt->u.dst);
1875 /* Try to figure out our local address for this prefix */
1877 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1878 struct inet6_ifaddr * ifp;
1879 struct in6_addr addr;
1880 int create = 0, update_lft = 0;
1881 struct net *net = dev_net(dev);
1883 if (pinfo->prefix_len == 64) {
1884 memcpy(&addr, &pinfo->prefix, 8);
1885 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1886 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1887 in6_dev_put(in6_dev);
1892 if (net_ratelimit())
1893 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1895 in6_dev_put(in6_dev);
1900 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1902 if (ifp == NULL && valid_lft) {
1903 int max_addresses = in6_dev->cnf.max_addresses;
1906 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1907 if (in6_dev->cnf.optimistic_dad &&
1908 !net->ipv6.devconf_all->forwarding)
1909 addr_flags = IFA_F_OPTIMISTIC;
1912 /* Do not allow to create too much of autoconfigured
1913 * addresses; this would be too easy way to crash kernel.
1915 if (!max_addresses ||
1916 ipv6_count_addresses(in6_dev) < max_addresses)
1917 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1918 addr_type&IPV6_ADDR_SCOPE_MASK,
1921 if (!ifp || IS_ERR(ifp)) {
1922 in6_dev_put(in6_dev);
1926 update_lft = create = 1;
1927 ifp->cstamp = jiffies;
1928 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1934 #ifdef CONFIG_IPV6_PRIVACY
1935 struct inet6_ifaddr *ift;
1939 /* update lifetime (RFC2462 5.5.3 e) */
1940 spin_lock(&ifp->lock);
1942 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1943 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1946 if (!update_lft && stored_lft) {
1947 if (valid_lft > MIN_VALID_LIFETIME ||
1948 valid_lft > stored_lft)
1950 else if (stored_lft <= MIN_VALID_LIFETIME) {
1951 /* valid_lft <= stored_lft is always true */
1955 valid_lft = MIN_VALID_LIFETIME;
1956 if (valid_lft < prefered_lft)
1957 prefered_lft = valid_lft;
1963 ifp->valid_lft = valid_lft;
1964 ifp->prefered_lft = prefered_lft;
1967 ifp->flags &= ~IFA_F_DEPRECATED;
1968 spin_unlock(&ifp->lock);
1970 if (!(flags&IFA_F_TENTATIVE))
1971 ipv6_ifa_notify(0, ifp);
1973 spin_unlock(&ifp->lock);
1975 #ifdef CONFIG_IPV6_PRIVACY
1976 read_lock_bh(&in6_dev->lock);
1977 /* update all temporary addresses in the list */
1978 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1980 * When adjusting the lifetimes of an existing
1981 * temporary address, only lower the lifetimes.
1982 * Implementations must not increase the
1983 * lifetimes of an existing temporary address
1984 * when processing a Prefix Information Option.
1986 if (ifp != ift->ifpub)
1989 spin_lock(&ift->lock);
1991 if (ift->valid_lft > valid_lft &&
1992 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1993 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1994 if (ift->prefered_lft > prefered_lft &&
1995 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1996 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1997 spin_unlock(&ift->lock);
1998 if (!(flags&IFA_F_TENTATIVE))
1999 ipv6_ifa_notify(0, ift);
2002 if (create && in6_dev->cnf.use_tempaddr > 0) {
2004 * When a new public address is created as described in [ADDRCONF],
2005 * also create a new temporary address.
2007 read_unlock_bh(&in6_dev->lock);
2008 ipv6_create_tempaddr(ifp, NULL);
2010 read_unlock_bh(&in6_dev->lock);
2017 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2018 in6_dev_put(in6_dev);
2022 * Set destination address.
2023 * Special case for SIT interfaces where we create a new "virtual"
2026 int addrconf_set_dstaddr(struct net *net, void __user *arg)
2028 struct in6_ifreq ireq;
2029 struct net_device *dev;
2035 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2038 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
2044 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2045 if (dev->type == ARPHRD_SIT) {
2046 const struct net_device_ops *ops = dev->netdev_ops;
2048 struct ip_tunnel_parm p;
2050 err = -EADDRNOTAVAIL;
2051 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2054 memset(&p, 0, sizeof(p));
2055 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2059 p.iph.protocol = IPPROTO_IPV6;
2061 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
2063 if (ops->ndo_do_ioctl) {
2064 mm_segment_t oldfs = get_fs();
2067 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2074 dev = __dev_get_by_name(net, p.name);
2077 err = dev_open(dev);
2088 * Manual configuration of address on an interface
2090 static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
2091 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
2094 struct inet6_ifaddr *ifp;
2095 struct inet6_dev *idev;
2096 struct net_device *dev;
2100 unsigned long timeout;
2107 /* check the lifetime */
2108 if (!valid_lft || prefered_lft > valid_lft)
2111 dev = __dev_get_by_index(net, ifindex);
2115 if ((idev = addrconf_add_dev(dev)) == NULL)
2118 scope = ipv6_addr_scope(pfx);
2120 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2121 if (addrconf_finite_timeout(timeout)) {
2122 expires = jiffies_to_clock_t(timeout * HZ);
2123 valid_lft = timeout;
2124 flags = RTF_EXPIRES;
2128 ifa_flags |= IFA_F_PERMANENT;
2131 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2132 if (addrconf_finite_timeout(timeout)) {
2134 ifa_flags |= IFA_F_DEPRECATED;
2135 prefered_lft = timeout;
2138 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2141 spin_lock_bh(&ifp->lock);
2142 ifp->valid_lft = valid_lft;
2143 ifp->prefered_lft = prefered_lft;
2144 ifp->tstamp = jiffies;
2145 spin_unlock_bh(&ifp->lock);
2147 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2150 * Note that section 3.1 of RFC 4429 indicates
2151 * that the Optimistic flag should not be set for
2152 * manually configured addresses
2154 addrconf_dad_start(ifp, 0);
2160 return PTR_ERR(ifp);
2163 static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
2166 struct inet6_ifaddr *ifp;
2167 struct inet6_dev *idev;
2168 struct net_device *dev;
2173 dev = __dev_get_by_index(net, ifindex);
2177 if ((idev = __in6_dev_get(dev)) == NULL)
2180 read_lock_bh(&idev->lock);
2181 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2182 if (ifp->prefix_len == plen &&
2183 ipv6_addr_equal(pfx, &ifp->addr)) {
2185 read_unlock_bh(&idev->lock);
2189 /* If the last address is deleted administratively,
2190 disable IPv6 on this interface.
2192 if (idev->addr_list == NULL)
2193 addrconf_ifdown(idev->dev, 1);
2197 read_unlock_bh(&idev->lock);
2198 return -EADDRNOTAVAIL;
2202 int addrconf_add_ifaddr(struct net *net, void __user *arg)
2204 struct in6_ifreq ireq;
2207 if (!capable(CAP_NET_ADMIN))
2210 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2214 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2215 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2216 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2221 int addrconf_del_ifaddr(struct net *net, void __user *arg)
2223 struct in6_ifreq ireq;
2226 if (!capable(CAP_NET_ADMIN))
2229 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2233 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2234 ireq.ifr6_prefixlen);
2239 static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2240 int plen, int scope)
2242 struct inet6_ifaddr *ifp;
2244 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2246 spin_lock_bh(&ifp->lock);
2247 ifp->flags &= ~IFA_F_TENTATIVE;
2248 spin_unlock_bh(&ifp->lock);
2249 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2254 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2255 static void sit_add_v4_addrs(struct inet6_dev *idev)
2257 struct in6_addr addr;
2258 struct net_device *dev;
2259 struct net *net = dev_net(idev->dev);
2264 memset(&addr, 0, sizeof(struct in6_addr));
2265 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2267 if (idev->dev->flags&IFF_POINTOPOINT) {
2268 addr.s6_addr32[0] = htonl(0xfe800000);
2271 scope = IPV6_ADDR_COMPATv4;
2274 if (addr.s6_addr32[3]) {
2275 add_addr(idev, &addr, 128, scope);
2279 for_each_netdev(net, dev) {
2280 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2281 if (in_dev && (dev->flags & IFF_UP)) {
2282 struct in_ifaddr * ifa;
2286 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2289 addr.s6_addr32[3] = ifa->ifa_local;
2291 if (ifa->ifa_scope == RT_SCOPE_LINK)
2293 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2294 if (idev->dev->flags&IFF_POINTOPOINT)
2298 if (idev->dev->flags&IFF_POINTOPOINT)
2303 add_addr(idev, &addr, plen, flag);
2310 static void init_loopback(struct net_device *dev)
2312 struct inet6_dev *idev;
2318 if ((idev = ipv6_find_idev(dev)) == NULL) {
2319 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2323 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
2326 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2328 struct inet6_ifaddr * ifp;
2329 u32 addr_flags = IFA_F_PERMANENT;
2331 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2332 if (idev->cnf.optimistic_dad &&
2333 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
2334 addr_flags |= IFA_F_OPTIMISTIC;
2338 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2340 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2341 addrconf_dad_start(ifp, 0);
2346 static void addrconf_dev_config(struct net_device *dev)
2348 struct in6_addr addr;
2349 struct inet6_dev * idev;
2353 if ((dev->type != ARPHRD_ETHER) &&
2354 (dev->type != ARPHRD_FDDI) &&
2355 (dev->type != ARPHRD_IEEE802_TR) &&
2356 (dev->type != ARPHRD_ARCNET) &&
2357 (dev->type != ARPHRD_INFINIBAND)) {
2358 /* Alas, we support only Ethernet autoconfiguration. */
2362 idev = addrconf_add_dev(dev);
2366 memset(&addr, 0, sizeof(struct in6_addr));
2367 addr.s6_addr32[0] = htonl(0xFE800000);
2369 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2370 addrconf_add_linklocal(idev, &addr);
2373 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2374 static void addrconf_sit_config(struct net_device *dev)
2376 struct inet6_dev *idev;
2381 * Configure the tunnel with one of our IPv4
2382 * addresses... we should configure all of
2383 * our v4 addrs in the tunnel
2386 if ((idev = ipv6_find_idev(dev)) == NULL) {
2387 printk(KERN_DEBUG "init sit: add_dev failed\n");
2391 if (dev->priv_flags & IFF_ISATAP) {
2392 struct in6_addr addr;
2394 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2395 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2396 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2397 addrconf_add_linklocal(idev, &addr);
2401 sit_add_v4_addrs(idev);
2403 if (dev->flags&IFF_POINTOPOINT) {
2404 addrconf_add_mroute(dev);
2405 addrconf_add_lroute(dev);
2412 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2414 struct in6_addr lladdr;
2416 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2417 addrconf_add_linklocal(idev, &lladdr);
2423 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2425 struct net_device *link_dev;
2426 struct net *net = dev_net(idev->dev);
2428 /* first try to inherit the link-local address from the link device */
2429 if (idev->dev->iflink &&
2430 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
2431 if (!ipv6_inherit_linklocal(idev, link_dev))
2434 /* then try to inherit it from any device */
2435 for_each_netdev(net, link_dev) {
2436 if (!ipv6_inherit_linklocal(idev, link_dev))
2439 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2443 * Autoconfigure tunnel with a link-local address so routing protocols,
2444 * DHCPv6, MLD etc. can be run over the virtual link
2447 static void addrconf_ip6_tnl_config(struct net_device *dev)
2449 struct inet6_dev *idev;
2453 if ((idev = addrconf_add_dev(dev)) == NULL) {
2454 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2457 ip6_tnl_add_linklocal(idev);
2460 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2463 struct net_device *dev = (struct net_device *) data;
2464 struct inet6_dev *idev = __in6_dev_get(dev);
2465 int run_pending = 0;
2469 case NETDEV_REGISTER:
2470 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2471 idev = ipv6_add_dev(dev);
2473 return notifier_from_errno(-ENOMEM);
2478 if (dev->flags & IFF_SLAVE)
2481 if (event == NETDEV_UP) {
2482 if (!addrconf_qdisc_ok(dev)) {
2483 /* device is not ready yet. */
2485 "ADDRCONF(NETDEV_UP): %s: "
2486 "link is not ready\n",
2491 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2492 idev = ipv6_add_dev(dev);
2495 idev->if_flags |= IF_READY;
2499 if (!addrconf_qdisc_ok(dev)) {
2500 /* device is still not ready. */
2505 if (idev->if_flags & IF_READY) {
2506 /* device is already configured. */
2509 idev->if_flags |= IF_READY;
2513 "ADDRCONF(NETDEV_CHANGE): %s: "
2514 "link becomes ready\n",
2521 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2523 addrconf_sit_config(dev);
2526 case ARPHRD_TUNNEL6:
2527 addrconf_ip6_tnl_config(dev);
2529 case ARPHRD_LOOPBACK:
2534 addrconf_dev_config(dev);
2539 addrconf_dad_run(idev);
2541 /* If the MTU changed during the interface down, when the
2542 interface up, the changed MTU must be reflected in the
2543 idev as well as routers.
2545 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2546 rt6_mtu_change(dev, dev->mtu);
2547 idev->cnf.mtu6 = dev->mtu;
2549 idev->tstamp = jiffies;
2550 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2551 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2552 stop IPv6 on this interface.
2554 if (dev->mtu < IPV6_MIN_MTU)
2555 addrconf_ifdown(dev, event != NETDEV_DOWN);
2559 case NETDEV_CHANGEMTU:
2560 if (idev && dev->mtu >= IPV6_MIN_MTU) {
2561 rt6_mtu_change(dev, dev->mtu);
2562 idev->cnf.mtu6 = dev->mtu;
2566 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2567 idev = ipv6_add_dev(dev);
2572 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2575 case NETDEV_UNREGISTER:
2577 * Remove all addresses from this interface.
2579 addrconf_ifdown(dev, event != NETDEV_DOWN);
2582 case NETDEV_CHANGENAME:
2584 snmp6_unregister_dev(idev);
2585 addrconf_sysctl_unregister(idev);
2586 addrconf_sysctl_register(idev);
2587 err = snmp6_register_dev(idev);
2589 return notifier_from_errno(err);
2598 * addrconf module should be notified of a device going up
2600 static struct notifier_block ipv6_dev_notf = {
2601 .notifier_call = addrconf_notify,
2605 static int addrconf_ifdown(struct net_device *dev, int how)
2607 struct inet6_dev *idev;
2608 struct inet6_ifaddr *ifa, **bifa;
2609 struct net *net = dev_net(dev);
2614 rt6_ifdown(net, dev);
2615 neigh_ifdown(&nd_tbl, dev);
2617 idev = __in6_dev_get(dev);
2621 /* Step 1: remove reference to ipv6 device from parent device.
2627 /* protected by rtnl_lock */
2628 rcu_assign_pointer(dev->ip6_ptr, NULL);
2630 /* Step 1.5: remove snmp6 entry */
2631 snmp6_unregister_dev(idev);
2635 /* Step 2: clear hash table */
2636 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2637 bifa = &inet6_addr_lst[i];
2639 write_lock_bh(&addrconf_hash_lock);
2640 while ((ifa = *bifa) != NULL) {
2641 if (ifa->idev == idev) {
2642 *bifa = ifa->lst_next;
2643 ifa->lst_next = NULL;
2644 addrconf_del_timer(ifa);
2648 bifa = &ifa->lst_next;
2650 write_unlock_bh(&addrconf_hash_lock);
2653 write_lock_bh(&idev->lock);
2655 /* Step 3: clear flags for stateless addrconf */
2657 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2659 /* Step 4: clear address list */
2660 #ifdef CONFIG_IPV6_PRIVACY
2661 if (how && del_timer(&idev->regen_timer))
2664 /* clear tempaddr list */
2665 while ((ifa = idev->tempaddr_list) != NULL) {
2666 idev->tempaddr_list = ifa->tmp_next;
2667 ifa->tmp_next = NULL;
2669 write_unlock_bh(&idev->lock);
2670 spin_lock_bh(&ifa->lock);
2673 in6_ifa_put(ifa->ifpub);
2676 spin_unlock_bh(&ifa->lock);
2678 write_lock_bh(&idev->lock);
2681 while ((ifa = idev->addr_list) != NULL) {
2682 idev->addr_list = ifa->if_next;
2683 ifa->if_next = NULL;
2685 addrconf_del_timer(ifa);
2686 write_unlock_bh(&idev->lock);
2688 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2689 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2692 write_lock_bh(&idev->lock);
2694 write_unlock_bh(&idev->lock);
2696 /* Step 5: Discard multicast list */
2699 ipv6_mc_destroy_dev(idev);
2703 idev->tstamp = jiffies;
2705 /* Shot the device (if unregistered) */
2708 addrconf_sysctl_unregister(idev);
2709 neigh_parms_release(&nd_tbl, idev->nd_parms);
2710 neigh_ifdown(&nd_tbl, dev);
2716 static void addrconf_rs_timer(unsigned long data)
2718 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2720 if (ifp->idev->cnf.forwarding)
2723 if (ifp->idev->if_flags & IF_RA_RCVD) {
2725 * Announcement received after solicitation
2731 spin_lock(&ifp->lock);
2732 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2733 /* The wait after the last probe can be shorter */
2734 addrconf_mod_timer(ifp, AC_RS,
2735 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2736 ifp->idev->cnf.rtr_solicit_delay :
2737 ifp->idev->cnf.rtr_solicit_interval);
2738 spin_unlock(&ifp->lock);
2740 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2742 spin_unlock(&ifp->lock);
2744 * Note: we do not support deprecated "all on-link"
2745 * assumption any longer.
2747 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2748 ifp->idev->dev->name);
2756 * Duplicate Address Detection
2758 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2760 unsigned long rand_num;
2761 struct inet6_dev *idev = ifp->idev;
2763 if (ifp->flags & IFA_F_OPTIMISTIC)
2766 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2768 ifp->probes = idev->cnf.dad_transmits;
2769 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2772 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2774 struct inet6_dev *idev = ifp->idev;
2775 struct net_device *dev = idev->dev;
2777 addrconf_join_solict(dev, &ifp->addr);
2779 net_srandom(ifp->addr.s6_addr32[3]);
2781 read_lock_bh(&idev->lock);
2784 spin_lock_bh(&ifp->lock);
2786 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2787 idev->cnf.accept_dad < 1 ||
2788 !(ifp->flags&IFA_F_TENTATIVE) ||
2789 ifp->flags & IFA_F_NODAD) {
2790 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2791 spin_unlock_bh(&ifp->lock);
2792 read_unlock_bh(&idev->lock);
2794 addrconf_dad_completed(ifp);
2798 if (!(idev->if_flags & IF_READY)) {
2799 spin_unlock_bh(&ifp->lock);
2800 read_unlock_bh(&idev->lock);
2802 * If the defice is not ready:
2803 * - keep it tentative if it is a permanent address.
2804 * - otherwise, kill it.
2807 addrconf_dad_stop(ifp);
2812 * Optimistic nodes can start receiving
2815 if(ifp->flags & IFA_F_OPTIMISTIC)
2816 ip6_ins_rt(ifp->rt);
2818 addrconf_dad_kick(ifp);
2819 spin_unlock_bh(&ifp->lock);
2821 read_unlock_bh(&idev->lock);
2824 static void addrconf_dad_timer(unsigned long data)
2826 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2827 struct inet6_dev *idev = ifp->idev;
2828 struct in6_addr mcaddr;
2830 read_lock_bh(&idev->lock);
2832 read_unlock_bh(&idev->lock);
2835 spin_lock_bh(&ifp->lock);
2836 if (ifp->probes == 0) {
2838 * DAD was successful
2841 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2842 spin_unlock_bh(&ifp->lock);
2843 read_unlock_bh(&idev->lock);
2845 addrconf_dad_completed(ifp);
2851 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2852 spin_unlock_bh(&ifp->lock);
2853 read_unlock_bh(&idev->lock);
2855 /* send a neighbour solicitation for our addr */
2856 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2857 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
2862 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2864 struct net_device * dev = ifp->idev->dev;
2867 * Configure the address for reception. Now it is valid.
2870 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2872 /* If added prefix is link local and forwarding is off,
2873 start sending router solicitations.
2876 if (ifp->idev->cnf.forwarding == 0 &&
2877 ifp->idev->cnf.rtr_solicits > 0 &&
2878 (dev->flags&IFF_LOOPBACK) == 0 &&
2879 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2881 * If a host as already performed a random delay
2882 * [...] as part of DAD [...] there is no need
2883 * to delay again before sending the first RS
2885 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2887 spin_lock_bh(&ifp->lock);
2889 ifp->idev->if_flags |= IF_RS_SENT;
2890 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2891 spin_unlock_bh(&ifp->lock);
2895 static void addrconf_dad_run(struct inet6_dev *idev) {
2896 struct inet6_ifaddr *ifp;
2898 read_lock_bh(&idev->lock);
2899 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2900 spin_lock_bh(&ifp->lock);
2901 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2902 spin_unlock_bh(&ifp->lock);
2905 spin_unlock_bh(&ifp->lock);
2906 addrconf_dad_kick(ifp);
2908 read_unlock_bh(&idev->lock);
2911 #ifdef CONFIG_PROC_FS
2912 struct if6_iter_state {
2913 struct seq_net_private p;
2917 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2919 struct inet6_ifaddr *ifa = NULL;
2920 struct if6_iter_state *state = seq->private;
2921 struct net *net = seq_file_net(seq);
2923 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2924 ifa = inet6_addr_lst[state->bucket];
2926 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
2927 ifa = ifa->lst_next;
2934 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2936 struct if6_iter_state *state = seq->private;
2937 struct net *net = seq_file_net(seq);
2939 ifa = ifa->lst_next;
2942 if (!net_eq(dev_net(ifa->idev->dev), net)) {
2943 ifa = ifa->lst_next;
2948 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2949 ifa = inet6_addr_lst[state->bucket];
2956 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2958 struct inet6_ifaddr *ifa = if6_get_first(seq);
2961 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2963 return pos ? NULL : ifa;
2966 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2967 __acquires(addrconf_hash_lock)
2969 read_lock_bh(&addrconf_hash_lock);
2970 return if6_get_idx(seq, *pos);
2973 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2975 struct inet6_ifaddr *ifa;
2977 ifa = if6_get_next(seq, v);
2982 static void if6_seq_stop(struct seq_file *seq, void *v)
2983 __releases(addrconf_hash_lock)
2985 read_unlock_bh(&addrconf_hash_lock);
2988 static int if6_seq_show(struct seq_file *seq, void *v)
2990 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2991 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
2993 ifp->idev->dev->ifindex,
2997 ifp->idev->dev->name);
3001 static const struct seq_operations if6_seq_ops = {
3002 .start = if6_seq_start,
3003 .next = if6_seq_next,
3004 .show = if6_seq_show,
3005 .stop = if6_seq_stop,
3008 static int if6_seq_open(struct inode *inode, struct file *file)
3010 return seq_open_net(inode, file, &if6_seq_ops,
3011 sizeof(struct if6_iter_state));
3014 static const struct file_operations if6_fops = {
3015 .owner = THIS_MODULE,
3016 .open = if6_seq_open,
3018 .llseek = seq_lseek,
3019 .release = seq_release_net,
3022 static int if6_proc_net_init(struct net *net)
3024 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
3029 static void if6_proc_net_exit(struct net *net)
3031 proc_net_remove(net, "if_inet6");
3034 static struct pernet_operations if6_proc_net_ops = {
3035 .init = if6_proc_net_init,
3036 .exit = if6_proc_net_exit,
3039 int __init if6_proc_init(void)
3041 return register_pernet_subsys(&if6_proc_net_ops);
3044 void if6_proc_exit(void)
3046 unregister_pernet_subsys(&if6_proc_net_ops);
3048 #endif /* CONFIG_PROC_FS */
3050 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3051 /* Check if address is a home address configured on any interface. */
3052 int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3055 struct inet6_ifaddr * ifp;
3056 u8 hash = ipv6_addr_hash(addr);
3057 read_lock_bh(&addrconf_hash_lock);
3058 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
3059 if (!net_eq(dev_net(ifp->idev->dev), net))
3061 if (ipv6_addr_equal(&ifp->addr, addr) &&
3062 (ifp->flags & IFA_F_HOMEADDRESS)) {
3067 read_unlock_bh(&addrconf_hash_lock);
3073 * Periodic address status verification
3076 static void addrconf_verify(unsigned long foo)
3078 struct inet6_ifaddr *ifp;
3079 unsigned long now, next;
3082 spin_lock_bh(&addrconf_verify_lock);
3084 next = now + ADDR_CHECK_FREQUENCY;
3086 del_timer(&addr_chk_timer);
3088 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3091 read_lock(&addrconf_hash_lock);
3092 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3094 #ifdef CONFIG_IPV6_PRIVACY
3095 unsigned long regen_advance;
3098 if (ifp->flags & IFA_F_PERMANENT)
3101 spin_lock(&ifp->lock);
3102 age = (now - ifp->tstamp) / HZ;
3104 #ifdef CONFIG_IPV6_PRIVACY
3105 regen_advance = ifp->idev->cnf.regen_max_retry *
3106 ifp->idev->cnf.dad_transmits *
3107 ifp->idev->nd_parms->retrans_time / HZ;
3110 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3111 age >= ifp->valid_lft) {
3112 spin_unlock(&ifp->lock);
3114 read_unlock(&addrconf_hash_lock);
3117 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3118 spin_unlock(&ifp->lock);
3120 } else if (age >= ifp->prefered_lft) {
3121 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3124 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3126 ifp->flags |= IFA_F_DEPRECATED;
3129 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3130 next = ifp->tstamp + ifp->valid_lft * HZ;
3132 spin_unlock(&ifp->lock);
3136 read_unlock(&addrconf_hash_lock);
3138 ipv6_ifa_notify(0, ifp);
3142 #ifdef CONFIG_IPV6_PRIVACY
3143 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3144 !(ifp->flags&IFA_F_TENTATIVE)) {
3145 if (age >= ifp->prefered_lft - regen_advance) {
3146 struct inet6_ifaddr *ifpub = ifp->ifpub;
3147 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3148 next = ifp->tstamp + ifp->prefered_lft * HZ;
3149 if (!ifp->regen_count && ifpub) {
3152 in6_ifa_hold(ifpub);
3153 spin_unlock(&ifp->lock);
3154 read_unlock(&addrconf_hash_lock);
3155 spin_lock(&ifpub->lock);
3156 ifpub->regen_count = 0;
3157 spin_unlock(&ifpub->lock);
3158 ipv6_create_tempaddr(ifpub, ifp);
3163 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3164 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3165 spin_unlock(&ifp->lock);
3168 /* ifp->prefered_lft <= ifp->valid_lft */
3169 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3170 next = ifp->tstamp + ifp->prefered_lft * HZ;
3171 spin_unlock(&ifp->lock);
3174 read_unlock(&addrconf_hash_lock);
3177 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3178 add_timer(&addr_chk_timer);
3179 spin_unlock_bh(&addrconf_verify_lock);
3182 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3184 struct in6_addr *pfx = NULL;
3187 pfx = nla_data(addr);
3190 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3193 pfx = nla_data(local);
3199 static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3200 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3201 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3202 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3206 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3208 struct net *net = sock_net(skb->sk);
3209 struct ifaddrmsg *ifm;
3210 struct nlattr *tb[IFA_MAX+1];
3211 struct in6_addr *pfx;
3214 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3218 ifm = nlmsg_data(nlh);
3219 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3223 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3226 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3227 u32 prefered_lft, u32 valid_lft)
3231 unsigned long timeout;
3233 if (!valid_lft || (prefered_lft > valid_lft))
3236 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3237 if (addrconf_finite_timeout(timeout)) {
3238 expires = jiffies_to_clock_t(timeout * HZ);
3239 valid_lft = timeout;
3240 flags = RTF_EXPIRES;
3244 ifa_flags |= IFA_F_PERMANENT;
3247 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3248 if (addrconf_finite_timeout(timeout)) {
3250 ifa_flags |= IFA_F_DEPRECATED;
3251 prefered_lft = timeout;
3254 spin_lock_bh(&ifp->lock);
3255 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3256 ifp->tstamp = jiffies;
3257 ifp->valid_lft = valid_lft;
3258 ifp->prefered_lft = prefered_lft;
3260 spin_unlock_bh(&ifp->lock);
3261 if (!(ifp->flags&IFA_F_TENTATIVE))
3262 ipv6_ifa_notify(0, ifp);
3264 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3272 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3274 struct net *net = sock_net(skb->sk);
3275 struct ifaddrmsg *ifm;
3276 struct nlattr *tb[IFA_MAX+1];
3277 struct in6_addr *pfx;
3278 struct inet6_ifaddr *ifa;
3279 struct net_device *dev;
3280 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3284 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3288 ifm = nlmsg_data(nlh);
3289 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3293 if (tb[IFA_CACHEINFO]) {
3294 struct ifa_cacheinfo *ci;
3296 ci = nla_data(tb[IFA_CACHEINFO]);
3297 valid_lft = ci->ifa_valid;
3298 preferred_lft = ci->ifa_prefered;
3300 preferred_lft = INFINITY_LIFE_TIME;
3301 valid_lft = INFINITY_LIFE_TIME;
3304 dev = __dev_get_by_index(net, ifm->ifa_index);
3308 /* We ignore other flags so far. */
3309 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3311 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
3314 * It would be best to check for !NLM_F_CREATE here but
3315 * userspace alreay relies on not having to provide this.
3317 return inet6_addr_add(net, ifm->ifa_index, pfx,
3318 ifm->ifa_prefixlen, ifa_flags,
3319 preferred_lft, valid_lft);
3322 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3323 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3326 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3333 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3334 u8 scope, int ifindex)
3336 struct ifaddrmsg *ifm;
3338 ifm = nlmsg_data(nlh);
3339 ifm->ifa_family = AF_INET6;
3340 ifm->ifa_prefixlen = prefixlen;
3341 ifm->ifa_flags = flags;
3342 ifm->ifa_scope = scope;
3343 ifm->ifa_index = ifindex;
3346 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3347 unsigned long tstamp, u32 preferred, u32 valid)
3349 struct ifa_cacheinfo ci;
3351 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3352 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3353 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3354 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3355 ci.ifa_prefered = preferred;
3356 ci.ifa_valid = valid;
3358 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3361 static inline int rt_scope(int ifa_scope)
3363 if (ifa_scope & IFA_HOST)
3364 return RT_SCOPE_HOST;
3365 else if (ifa_scope & IFA_LINK)
3366 return RT_SCOPE_LINK;
3367 else if (ifa_scope & IFA_SITE)
3368 return RT_SCOPE_SITE;
3370 return RT_SCOPE_UNIVERSE;
3373 static inline int inet6_ifaddr_msgsize(void)
3375 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3376 + nla_total_size(16) /* IFA_ADDRESS */
3377 + nla_total_size(sizeof(struct ifa_cacheinfo));
3380 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3381 u32 pid, u32 seq, int event, unsigned int flags)
3383 struct nlmsghdr *nlh;
3384 u32 preferred, valid;
3386 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3390 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3391 ifa->idev->dev->ifindex);
3393 if (!(ifa->flags&IFA_F_PERMANENT)) {
3394 preferred = ifa->prefered_lft;
3395 valid = ifa->valid_lft;
3396 if (preferred != INFINITY_LIFE_TIME) {
3397 long tval = (jiffies - ifa->tstamp)/HZ;
3399 if (valid != INFINITY_LIFE_TIME)
3403 preferred = INFINITY_LIFE_TIME;
3404 valid = INFINITY_LIFE_TIME;
3407 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3408 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3409 nlmsg_cancel(skb, nlh);
3413 return nlmsg_end(skb, nlh);
3416 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3417 u32 pid, u32 seq, int event, u16 flags)
3419 struct nlmsghdr *nlh;
3420 u8 scope = RT_SCOPE_UNIVERSE;
3421 int ifindex = ifmca->idev->dev->ifindex;
3423 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3424 scope = RT_SCOPE_SITE;
3426 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3430 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3431 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3432 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3433 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3434 nlmsg_cancel(skb, nlh);
3438 return nlmsg_end(skb, nlh);
3441 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3442 u32 pid, u32 seq, int event, unsigned int flags)
3444 struct nlmsghdr *nlh;
3445 u8 scope = RT_SCOPE_UNIVERSE;
3446 int ifindex = ifaca->aca_idev->dev->ifindex;
3448 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3449 scope = RT_SCOPE_SITE;
3451 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3455 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3456 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3457 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3458 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3459 nlmsg_cancel(skb, nlh);
3463 return nlmsg_end(skb, nlh);
3473 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3474 enum addr_type_t type)
3477 int s_idx, s_ip_idx;
3479 struct net_device *dev;
3480 struct inet6_dev *idev = NULL;
3481 struct inet6_ifaddr *ifa;
3482 struct ifmcaddr6 *ifmca;
3483 struct ifacaddr6 *ifaca;
3484 struct net *net = sock_net(skb->sk);
3486 s_idx = cb->args[0];
3487 s_ip_idx = ip_idx = cb->args[1];
3490 for_each_netdev(net, dev) {
3496 if ((idev = in6_dev_get(dev)) == NULL)
3498 read_lock_bh(&idev->lock);
3501 /* unicast address incl. temp addr */
3502 for (ifa = idev->addr_list; ifa;
3503 ifa = ifa->if_next, ip_idx++) {
3504 if (ip_idx < s_ip_idx)
3506 err = inet6_fill_ifaddr(skb, ifa,
3507 NETLINK_CB(cb->skb).pid,
3513 case MULTICAST_ADDR:
3514 /* multicast address */
3515 for (ifmca = idev->mc_list; ifmca;
3516 ifmca = ifmca->next, ip_idx++) {
3517 if (ip_idx < s_ip_idx)
3519 err = inet6_fill_ifmcaddr(skb, ifmca,
3520 NETLINK_CB(cb->skb).pid,
3527 /* anycast address */
3528 for (ifaca = idev->ac_list; ifaca;
3529 ifaca = ifaca->aca_next, ip_idx++) {
3530 if (ip_idx < s_ip_idx)
3532 err = inet6_fill_ifacaddr(skb, ifaca,
3533 NETLINK_CB(cb->skb).pid,
3542 read_unlock_bh(&idev->lock);
3551 cb->args[1] = ip_idx;
3555 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3557 enum addr_type_t type = UNICAST_ADDR;
3559 return inet6_dump_addr(skb, cb, type);
3562 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3564 enum addr_type_t type = MULTICAST_ADDR;
3566 return inet6_dump_addr(skb, cb, type);
3570 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3572 enum addr_type_t type = ANYCAST_ADDR;
3574 return inet6_dump_addr(skb, cb, type);
3577 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3580 struct net *net = sock_net(in_skb->sk);
3581 struct ifaddrmsg *ifm;
3582 struct nlattr *tb[IFA_MAX+1];
3583 struct in6_addr *addr = NULL;
3584 struct net_device *dev = NULL;
3585 struct inet6_ifaddr *ifa;
3586 struct sk_buff *skb;
3589 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3593 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3599 ifm = nlmsg_data(nlh);
3601 dev = __dev_get_by_index(net, ifm->ifa_index);
3603 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
3604 err = -EADDRNOTAVAIL;
3608 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3613 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3614 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3616 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3617 WARN_ON(err == -EMSGSIZE);
3621 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
3628 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3630 struct sk_buff *skb;
3631 struct net *net = dev_net(ifa->idev->dev);
3634 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3638 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3640 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3641 WARN_ON(err == -EMSGSIZE);
3645 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3649 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3652 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3653 __s32 *array, int bytes)
3655 BUG_ON(bytes < (DEVCONF_MAX * 4));
3657 memset(array, 0, bytes);
3658 array[DEVCONF_FORWARDING] = cnf->forwarding;
3659 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3660 array[DEVCONF_MTU6] = cnf->mtu6;
3661 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3662 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3663 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3664 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3665 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3666 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3667 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3668 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3669 #ifdef CONFIG_IPV6_PRIVACY
3670 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3671 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3672 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3673 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3674 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3676 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3677 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3678 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3679 #ifdef CONFIG_IPV6_ROUTER_PREF
3680 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3681 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3682 #ifdef CONFIG_IPV6_ROUTE_INFO
3683 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3686 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3687 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3688 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3689 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3691 #ifdef CONFIG_IPV6_MROUTE
3692 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3694 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
3695 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
3698 static inline size_t inet6_if_nlmsg_size(void)
3700 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3701 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3702 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3703 + nla_total_size(4) /* IFLA_MTU */
3704 + nla_total_size(4) /* IFLA_LINK */
3705 + nla_total_size( /* IFLA_PROTINFO */
3706 nla_total_size(4) /* IFLA_INET6_FLAGS */
3707 + nla_total_size(sizeof(struct ifla_cacheinfo))
3708 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3709 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3710 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3714 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3718 int pad = bytes - sizeof(u64) * items;
3721 /* Use put_unaligned() because stats may not be aligned for u64. */
3722 put_unaligned(items, &stats[0]);
3723 for (i = 1; i < items; i++)
3724 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3726 memset(&stats[items], 0, pad);
3729 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3733 case IFLA_INET6_STATS:
3734 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3736 case IFLA_INET6_ICMP6STATS:
3737 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3742 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3743 u32 pid, u32 seq, int event, unsigned int flags)
3745 struct net_device *dev = idev->dev;
3747 struct ifinfomsg *hdr;
3748 struct nlmsghdr *nlh;
3750 struct ifla_cacheinfo ci;
3752 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3756 hdr = nlmsg_data(nlh);
3757 hdr->ifi_family = AF_INET6;
3759 hdr->ifi_type = dev->type;
3760 hdr->ifi_index = dev->ifindex;
3761 hdr->ifi_flags = dev_get_flags(dev);
3762 hdr->ifi_change = 0;
3764 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3767 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3769 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3770 if (dev->ifindex != dev->iflink)
3771 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3773 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3774 if (protoinfo == NULL)
3775 goto nla_put_failure;
3777 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3779 ci.max_reasm_len = IPV6_MAXPLEN;
3780 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3781 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3782 ci.reachable_time = idev->nd_parms->reachable_time;
3783 ci.retrans_time = idev->nd_parms->retrans_time;
3784 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3786 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3788 goto nla_put_failure;
3789 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3791 /* XXX - MC not implemented */
3793 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3795 goto nla_put_failure;
3796 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3798 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3800 goto nla_put_failure;
3801 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3803 nla_nest_end(skb, protoinfo);
3804 return nlmsg_end(skb, nlh);
3807 nlmsg_cancel(skb, nlh);
3811 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3813 struct net *net = sock_net(skb->sk);
3815 int s_idx = cb->args[0];
3816 struct net_device *dev;
3817 struct inet6_dev *idev;
3819 read_lock(&dev_base_lock);
3821 for_each_netdev(net, dev) {
3824 if ((idev = in6_dev_get(dev)) == NULL)
3826 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3827 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3834 read_unlock(&dev_base_lock);
3840 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3842 struct sk_buff *skb;
3843 struct net *net = dev_net(idev->dev);
3846 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3850 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3852 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3853 WARN_ON(err == -EMSGSIZE);
3857 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3861 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3864 static inline size_t inet6_prefix_nlmsg_size(void)
3866 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3867 + nla_total_size(sizeof(struct in6_addr))
3868 + nla_total_size(sizeof(struct prefix_cacheinfo));
3871 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3872 struct prefix_info *pinfo, u32 pid, u32 seq,
3873 int event, unsigned int flags)
3875 struct prefixmsg *pmsg;
3876 struct nlmsghdr *nlh;
3877 struct prefix_cacheinfo ci;
3879 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3883 pmsg = nlmsg_data(nlh);
3884 pmsg->prefix_family = AF_INET6;
3885 pmsg->prefix_pad1 = 0;
3886 pmsg->prefix_pad2 = 0;
3887 pmsg->prefix_ifindex = idev->dev->ifindex;
3888 pmsg->prefix_len = pinfo->prefix_len;
3889 pmsg->prefix_type = pinfo->type;
3890 pmsg->prefix_pad3 = 0;
3891 pmsg->prefix_flags = 0;
3893 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3894 if (pinfo->autoconf)
3895 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3897 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3899 ci.preferred_time = ntohl(pinfo->prefered);
3900 ci.valid_time = ntohl(pinfo->valid);
3901 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3903 return nlmsg_end(skb, nlh);
3906 nlmsg_cancel(skb, nlh);
3910 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3911 struct prefix_info *pinfo)
3913 struct sk_buff *skb;
3914 struct net *net = dev_net(idev->dev);
3917 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3921 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3923 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3924 WARN_ON(err == -EMSGSIZE);
3928 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3932 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
3935 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3937 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3942 * If the address was optimistic
3943 * we inserted the route at the start of
3944 * our DAD process, so we don't need
3947 if (!(ifp->rt->rt6i_node))
3948 ip6_ins_rt(ifp->rt);
3949 if (ifp->idev->cnf.forwarding)
3950 addrconf_join_anycast(ifp);
3953 if (ifp->idev->cnf.forwarding)
3954 addrconf_leave_anycast(ifp);
3955 addrconf_leave_solict(ifp->idev, &ifp->addr);
3956 dst_hold(&ifp->rt->u.dst);
3957 if (ip6_del_rt(ifp->rt))
3958 dst_free(&ifp->rt->u.dst);
3963 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3966 if (likely(ifp->idev->dead == 0))
3967 __ipv6_ifa_notify(event, ifp);
3968 rcu_read_unlock_bh();
3971 #ifdef CONFIG_SYSCTL
3974 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3975 void __user *buffer, size_t *lenp, loff_t *ppos)
3977 int *valp = ctl->data;
3981 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3984 ret = addrconf_fixup_forwarding(ctl, valp, val);
3988 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3989 void __user *oldval,
3990 size_t __user *oldlenp,
3991 void __user *newval, size_t newlen)
3993 int *valp = table->data;
3997 if (!newval || !newlen)
3999 if (newlen != sizeof(int))
4001 if (get_user(new, (int __user *)newval))
4005 if (oldval && oldlenp) {
4007 if (get_user(len, oldlenp))
4010 if (len > table->maxlen)
4011 len = table->maxlen;
4012 if (copy_to_user(oldval, valp, len))
4014 if (put_user(len, oldlenp))
4020 return addrconf_fixup_forwarding(table, valp, val);
4023 static struct addrconf_sysctl_table
4025 struct ctl_table_header *sysctl_header;
4026 ctl_table addrconf_vars[DEVCONF_MAX+1];
4028 } addrconf_sysctl __read_mostly = {
4029 .sysctl_header = NULL,
4032 .ctl_name = NET_IPV6_FORWARDING,
4033 .procname = "forwarding",
4034 .data = &ipv6_devconf.forwarding,
4035 .maxlen = sizeof(int),
4037 .proc_handler = addrconf_sysctl_forward,
4038 .strategy = addrconf_sysctl_forward_strategy,
4041 .ctl_name = NET_IPV6_HOP_LIMIT,
4042 .procname = "hop_limit",
4043 .data = &ipv6_devconf.hop_limit,
4044 .maxlen = sizeof(int),
4046 .proc_handler = proc_dointvec,
4049 .ctl_name = NET_IPV6_MTU,
4051 .data = &ipv6_devconf.mtu6,
4052 .maxlen = sizeof(int),
4054 .proc_handler = proc_dointvec,
4057 .ctl_name = NET_IPV6_ACCEPT_RA,
4058 .procname = "accept_ra",
4059 .data = &ipv6_devconf.accept_ra,
4060 .maxlen = sizeof(int),
4062 .proc_handler = proc_dointvec,
4065 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4066 .procname = "accept_redirects",
4067 .data = &ipv6_devconf.accept_redirects,
4068 .maxlen = sizeof(int),
4070 .proc_handler = proc_dointvec,
4073 .ctl_name = NET_IPV6_AUTOCONF,
4074 .procname = "autoconf",
4075 .data = &ipv6_devconf.autoconf,
4076 .maxlen = sizeof(int),
4078 .proc_handler = proc_dointvec,
4081 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4082 .procname = "dad_transmits",
4083 .data = &ipv6_devconf.dad_transmits,
4084 .maxlen = sizeof(int),
4086 .proc_handler = proc_dointvec,
4089 .ctl_name = NET_IPV6_RTR_SOLICITS,
4090 .procname = "router_solicitations",
4091 .data = &ipv6_devconf.rtr_solicits,
4092 .maxlen = sizeof(int),
4094 .proc_handler = proc_dointvec,
4097 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4098 .procname = "router_solicitation_interval",
4099 .data = &ipv6_devconf.rtr_solicit_interval,
4100 .maxlen = sizeof(int),
4102 .proc_handler = proc_dointvec_jiffies,
4103 .strategy = sysctl_jiffies,
4106 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4107 .procname = "router_solicitation_delay",
4108 .data = &ipv6_devconf.rtr_solicit_delay,
4109 .maxlen = sizeof(int),
4111 .proc_handler = proc_dointvec_jiffies,
4112 .strategy = sysctl_jiffies,
4115 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4116 .procname = "force_mld_version",
4117 .data = &ipv6_devconf.force_mld_version,
4118 .maxlen = sizeof(int),
4120 .proc_handler = proc_dointvec,
4122 #ifdef CONFIG_IPV6_PRIVACY
4124 .ctl_name = NET_IPV6_USE_TEMPADDR,
4125 .procname = "use_tempaddr",
4126 .data = &ipv6_devconf.use_tempaddr,
4127 .maxlen = sizeof(int),
4129 .proc_handler = proc_dointvec,
4132 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4133 .procname = "temp_valid_lft",
4134 .data = &ipv6_devconf.temp_valid_lft,
4135 .maxlen = sizeof(int),
4137 .proc_handler = proc_dointvec,
4140 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4141 .procname = "temp_prefered_lft",
4142 .data = &ipv6_devconf.temp_prefered_lft,
4143 .maxlen = sizeof(int),
4145 .proc_handler = proc_dointvec,
4148 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4149 .procname = "regen_max_retry",
4150 .data = &ipv6_devconf.regen_max_retry,
4151 .maxlen = sizeof(int),
4153 .proc_handler = proc_dointvec,
4156 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4157 .procname = "max_desync_factor",
4158 .data = &ipv6_devconf.max_desync_factor,
4159 .maxlen = sizeof(int),
4161 .proc_handler = proc_dointvec,
4165 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4166 .procname = "max_addresses",
4167 .data = &ipv6_devconf.max_addresses,
4168 .maxlen = sizeof(int),
4170 .proc_handler = proc_dointvec,
4173 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4174 .procname = "accept_ra_defrtr",
4175 .data = &ipv6_devconf.accept_ra_defrtr,
4176 .maxlen = sizeof(int),
4178 .proc_handler = proc_dointvec,
4181 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4182 .procname = "accept_ra_pinfo",
4183 .data = &ipv6_devconf.accept_ra_pinfo,
4184 .maxlen = sizeof(int),
4186 .proc_handler = proc_dointvec,
4188 #ifdef CONFIG_IPV6_ROUTER_PREF
4190 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4191 .procname = "accept_ra_rtr_pref",
4192 .data = &ipv6_devconf.accept_ra_rtr_pref,
4193 .maxlen = sizeof(int),
4195 .proc_handler = proc_dointvec,
4198 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4199 .procname = "router_probe_interval",
4200 .data = &ipv6_devconf.rtr_probe_interval,
4201 .maxlen = sizeof(int),
4203 .proc_handler = proc_dointvec_jiffies,
4204 .strategy = sysctl_jiffies,
4206 #ifdef CONFIG_IPV6_ROUTE_INFO
4208 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4209 .procname = "accept_ra_rt_info_max_plen",
4210 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4211 .maxlen = sizeof(int),
4213 .proc_handler = proc_dointvec,
4218 .ctl_name = NET_IPV6_PROXY_NDP,
4219 .procname = "proxy_ndp",
4220 .data = &ipv6_devconf.proxy_ndp,
4221 .maxlen = sizeof(int),
4223 .proc_handler = proc_dointvec,
4226 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4227 .procname = "accept_source_route",
4228 .data = &ipv6_devconf.accept_source_route,
4229 .maxlen = sizeof(int),
4231 .proc_handler = proc_dointvec,
4233 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4235 .ctl_name = CTL_UNNUMBERED,
4236 .procname = "optimistic_dad",
4237 .data = &ipv6_devconf.optimistic_dad,
4238 .maxlen = sizeof(int),
4240 .proc_handler = proc_dointvec,
4244 #ifdef CONFIG_IPV6_MROUTE
4246 .ctl_name = CTL_UNNUMBERED,
4247 .procname = "mc_forwarding",
4248 .data = &ipv6_devconf.mc_forwarding,
4249 .maxlen = sizeof(int),
4251 .proc_handler = proc_dointvec,
4255 .ctl_name = CTL_UNNUMBERED,
4256 .procname = "disable_ipv6",
4257 .data = &ipv6_devconf.disable_ipv6,
4258 .maxlen = sizeof(int),
4260 .proc_handler = proc_dointvec,
4263 .ctl_name = CTL_UNNUMBERED,
4264 .procname = "accept_dad",
4265 .data = &ipv6_devconf.accept_dad,
4266 .maxlen = sizeof(int),
4268 .proc_handler = proc_dointvec,
4271 .ctl_name = 0, /* sentinel */
4276 static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4277 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
4280 struct addrconf_sysctl_table *t;
4282 #define ADDRCONF_CTL_PATH_DEV 3
4284 struct ctl_path addrconf_ctl_path[] = {
4285 { .procname = "net", .ctl_name = CTL_NET, },
4286 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4287 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4288 { /* to be set */ },
4293 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4297 for (i=0; t->addrconf_vars[i].data; i++) {
4298 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4299 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4300 t->addrconf_vars[i].extra2 = net;
4304 * Make a copy of dev_name, because '.procname' is regarded as const
4305 * by sysctl and we wouldn't want anyone to change it under our feet
4306 * (see SIOCSIFNAME).
4308 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4312 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4313 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
4315 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
4317 if (t->sysctl_header == NULL)
4331 static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4333 struct addrconf_sysctl_table *t;
4335 if (p->sysctl == NULL)
4340 unregister_sysctl_table(t->sysctl_header);
4345 static void addrconf_sysctl_register(struct inet6_dev *idev)
4347 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4348 NET_IPV6_NEIGH, "ipv6",
4349 &ndisc_ifinfo_sysctl_change,
4350 ndisc_ifinfo_sysctl_strategy);
4351 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4352 idev->dev->ifindex, idev, &idev->cnf);
4355 static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4357 __addrconf_sysctl_unregister(&idev->cnf);
4358 neigh_sysctl_unregister(idev->nd_parms);
4364 static int addrconf_init_net(struct net *net)
4367 struct ipv6_devconf *all, *dflt;
4370 all = &ipv6_devconf;
4371 dflt = &ipv6_devconf_dflt;
4373 if (net != &init_net) {
4374 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4378 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4380 goto err_alloc_dflt;
4383 net->ipv6.devconf_all = all;
4384 net->ipv6.devconf_dflt = dflt;
4386 #ifdef CONFIG_SYSCTL
4387 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4392 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4399 #ifdef CONFIG_SYSCTL
4401 __addrconf_sysctl_unregister(all);
4411 static void addrconf_exit_net(struct net *net)
4413 #ifdef CONFIG_SYSCTL
4414 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4415 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4417 if (net != &init_net) {
4418 kfree(net->ipv6.devconf_dflt);
4419 kfree(net->ipv6.devconf_all);
4423 static struct pernet_operations addrconf_ops = {
4424 .init = addrconf_init_net,
4425 .exit = addrconf_exit_net,
4432 int register_inet6addr_notifier(struct notifier_block *nb)
4434 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4437 EXPORT_SYMBOL(register_inet6addr_notifier);
4439 int unregister_inet6addr_notifier(struct notifier_block *nb)
4441 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4444 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4447 * Init / cleanup code
4450 int __init addrconf_init(void)
4454 if ((err = ipv6_addr_label_init()) < 0) {
4455 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4460 register_pernet_subsys(&addrconf_ops);
4462 /* The addrconf netdev notifier requires that loopback_dev
4463 * has it's ipv6 private information allocated and setup
4464 * before it can bring up and give link-local addresses
4465 * to other devices which are up.
4467 * Unfortunately, loopback_dev is not necessarily the first
4468 * entry in the global dev_base list of net devices. In fact,
4469 * it is likely to be the very last entry on that list.
4470 * So this causes the notifier registry below to try and
4471 * give link-local addresses to all devices besides loopback_dev
4472 * first, then loopback_dev, which cases all the non-loopback_dev
4473 * devices to fail to get a link-local address.
4475 * So, as a temporary fix, allocate the ipv6 structure for
4476 * loopback_dev first by hand.
4477 * Longer term, all of the dependencies ipv6 has upon the loopback
4478 * device and it being up should be removed.
4481 if (!ipv6_add_dev(init_net.loopback_dev))
4487 register_netdevice_notifier(&ipv6_dev_notf);
4491 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4495 /* Only the first call to __rtnl_register can fail */
4496 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4497 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4498 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4499 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4500 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4502 ipv6_addr_label_rtnl_register();
4506 unregister_netdevice_notifier(&ipv6_dev_notf);
4508 unregister_pernet_subsys(&addrconf_ops);
4513 void addrconf_cleanup(void)
4515 struct inet6_ifaddr *ifa;
4516 struct net_device *dev;
4519 unregister_netdevice_notifier(&ipv6_dev_notf);
4520 unregister_pernet_subsys(&addrconf_ops);
4524 /* clean dev list */
4525 for_each_netdev(&init_net, dev) {
4526 if (__in6_dev_get(dev) == NULL)
4528 addrconf_ifdown(dev, 1);
4530 addrconf_ifdown(init_net.loopback_dev, 2);
4535 write_lock_bh(&addrconf_hash_lock);
4536 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4537 for (ifa=inet6_addr_lst[i]; ifa; ) {
4538 struct inet6_ifaddr *bifa;
4541 ifa = ifa->lst_next;
4542 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4543 /* Do not free it; something is wrong.
4544 Now we can investigate it with debugger.
4548 write_unlock_bh(&addrconf_hash_lock);
4550 del_timer(&addr_chk_timer);