2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
25 * yoshfuji@USAGI : Fixed interval between DAD
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
41 #include <linux/errno.h>
42 #include <linux/types.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/net.h>
46 #include <linux/in6.h>
47 #include <linux/netdevice.h>
48 #include <linux/if_addr.h>
49 #include <linux/if_arp.h>
50 #include <linux/if_arcnet.h>
51 #include <linux/if_infiniband.h>
52 #include <linux/route.h>
53 #include <linux/inetdevice.h>
54 #include <linux/init.h>
56 #include <linux/sysctl.h>
58 #include <linux/capability.h>
59 #include <linux/delay.h>
60 #include <linux/notifier.h>
61 #include <linux/string.h>
63 #include <net/net_namespace.h>
68 #include <net/protocol.h>
69 #include <net/ndisc.h>
70 #include <net/ip6_route.h>
71 #include <net/addrconf.h>
74 #include <net/netlink.h>
75 #include <net/pkt_sched.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
83 #include <asm/uaccess.h>
84 #include <asm/unaligned.h>
86 #include <linux/proc_fs.h>
87 #include <linux/seq_file.h>
89 /* Set to 3 to get tracing... */
93 #define ADBG(x) printk x
98 #define INFINITY_LIFE_TIME 0xFFFFFFFF
99 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102 static void addrconf_sysctl_register(struct inet6_dev *idev);
103 static void addrconf_sysctl_unregister(struct inet6_dev *idev);
105 static inline void addrconf_sysctl_register(struct inet6_dev *idev)
109 static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
114 #ifdef CONFIG_IPV6_PRIVACY
115 static int __ipv6_regen_rndid(struct inet6_dev *idev);
116 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
117 static void ipv6_regen_rndid(unsigned long data);
119 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
122 static int ipv6_count_addresses(struct inet6_dev *idev);
125 * Configured unicast address hash table
127 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
128 static DEFINE_RWLOCK(addrconf_hash_lock);
130 static void addrconf_verify(unsigned long);
132 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
133 static DEFINE_SPINLOCK(addrconf_verify_lock);
135 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
136 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
138 static int addrconf_ifdown(struct net_device *dev, int how);
140 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
141 static void addrconf_dad_timer(unsigned long data);
142 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
143 static void addrconf_dad_run(struct inet6_dev *idev);
144 static void addrconf_rs_timer(unsigned long data);
145 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
146 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
149 struct prefix_info *pinfo);
150 static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
151 struct net_device *dev);
153 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
155 struct ipv6_devconf ipv6_devconf __read_mostly = {
157 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
158 .mtu6 = IPV6_MIN_MTU,
160 .accept_redirects = 1,
162 .force_mld_version = 0,
164 .rtr_solicits = MAX_RTR_SOLICITATIONS,
165 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
166 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
167 #ifdef CONFIG_IPV6_PRIVACY
169 .temp_valid_lft = TEMP_VALID_LIFETIME,
170 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
171 .regen_max_retry = REGEN_MAX_RETRY,
172 .max_desync_factor = MAX_DESYNC_FACTOR,
174 .max_addresses = IPV6_MAX_ADDRESSES,
175 .accept_ra_defrtr = 1,
176 .accept_ra_pinfo = 1,
177 #ifdef CONFIG_IPV6_ROUTER_PREF
178 .accept_ra_rtr_pref = 1,
179 .rtr_probe_interval = 60 * HZ,
180 #ifdef CONFIG_IPV6_ROUTE_INFO
181 .accept_ra_rt_info_max_plen = 0,
185 .accept_source_route = 0, /* we do not accept RH0 by default. */
188 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
190 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
191 .mtu6 = IPV6_MIN_MTU,
193 .accept_redirects = 1,
196 .rtr_solicits = MAX_RTR_SOLICITATIONS,
197 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
198 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
199 #ifdef CONFIG_IPV6_PRIVACY
201 .temp_valid_lft = TEMP_VALID_LIFETIME,
202 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
203 .regen_max_retry = REGEN_MAX_RETRY,
204 .max_desync_factor = MAX_DESYNC_FACTOR,
206 .max_addresses = IPV6_MAX_ADDRESSES,
207 .accept_ra_defrtr = 1,
208 .accept_ra_pinfo = 1,
209 #ifdef CONFIG_IPV6_ROUTER_PREF
210 .accept_ra_rtr_pref = 1,
211 .rtr_probe_interval = 60 * HZ,
212 #ifdef CONFIG_IPV6_ROUTE_INFO
213 .accept_ra_rt_info_max_plen = 0,
217 .accept_source_route = 0, /* we do not accept RH0 by default. */
220 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
221 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
222 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
223 const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
224 const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
226 /* Check if a valid qdisc is available */
227 static inline int addrconf_qdisc_ok(struct net_device *dev)
229 return (dev->qdisc != &noop_qdisc);
232 /* Check if a route is valid prefix route */
233 static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
235 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
238 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
240 if (del_timer(&ifp->timer))
244 enum addrconf_timer_t
251 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
252 enum addrconf_timer_t what,
255 if (!del_timer(&ifp->timer))
260 ifp->timer.function = addrconf_dad_timer;
263 ifp->timer.function = addrconf_rs_timer;
267 ifp->timer.expires = jiffies + when;
268 add_timer(&ifp->timer);
271 static int snmp6_alloc_dev(struct inet6_dev *idev)
273 if (snmp_mib_init((void **)idev->stats.ipv6,
274 sizeof(struct ipstats_mib)) < 0)
276 if (snmp_mib_init((void **)idev->stats.icmpv6,
277 sizeof(struct icmpv6_mib)) < 0)
279 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
280 sizeof(struct icmpv6msg_mib)) < 0)
286 snmp_mib_free((void **)idev->stats.icmpv6);
288 snmp_mib_free((void **)idev->stats.ipv6);
293 static void snmp6_free_dev(struct inet6_dev *idev)
295 snmp_mib_free((void **)idev->stats.icmpv6msg);
296 snmp_mib_free((void **)idev->stats.icmpv6);
297 snmp_mib_free((void **)idev->stats.ipv6);
300 /* Nobody refers to this device, we may destroy it. */
302 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
304 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
308 void in6_dev_finish_destroy(struct inet6_dev *idev)
310 struct net_device *dev = idev->dev;
311 BUG_TRAP(idev->addr_list==NULL);
312 BUG_TRAP(idev->mc_list==NULL);
313 #ifdef NET_REFCNT_DEBUG
314 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
318 printk("Freeing alive inet6 device %p\n", idev);
321 snmp6_free_dev(idev);
322 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
325 EXPORT_SYMBOL(in6_dev_finish_destroy);
327 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
329 struct inet6_dev *ndev;
333 if (dev->mtu < IPV6_MIN_MTU)
336 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
341 rwlock_init(&ndev->lock);
343 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
344 ndev->cnf.mtu6 = dev->mtu;
345 ndev->cnf.sysctl = NULL;
346 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
347 if (ndev->nd_parms == NULL) {
351 if (ndev->cnf.forwarding)
352 dev_disable_lro(dev);
353 /* We refer to the device */
356 if (snmp6_alloc_dev(ndev) < 0) {
358 "%s(): cannot allocate memory for statistics; dev=%s.\n",
359 __func__, dev->name));
360 neigh_parms_release(&nd_tbl, ndev->nd_parms);
362 in6_dev_finish_destroy(ndev);
366 if (snmp6_register_dev(ndev) < 0) {
368 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
369 __func__, dev->name));
370 neigh_parms_release(&nd_tbl, ndev->nd_parms);
372 in6_dev_finish_destroy(ndev);
376 /* One reference from device. We must do this before
377 * we invoke __ipv6_regen_rndid().
381 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
382 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
384 "%s: Disabled Multicast RS\n",
386 ndev->cnf.rtr_solicits = 0;
390 #ifdef CONFIG_IPV6_PRIVACY
391 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
392 if ((dev->flags&IFF_LOOPBACK) ||
393 dev->type == ARPHRD_TUNNEL ||
394 dev->type == ARPHRD_TUNNEL6 ||
395 dev->type == ARPHRD_SIT ||
396 dev->type == ARPHRD_NONE) {
398 "%s: Disabled Privacy Extensions\n",
400 ndev->cnf.use_tempaddr = -1;
403 ipv6_regen_rndid((unsigned long) ndev);
407 if (netif_running(dev) && addrconf_qdisc_ok(dev))
408 ndev->if_flags |= IF_READY;
410 ipv6_mc_init_dev(ndev);
411 ndev->tstamp = jiffies;
412 addrconf_sysctl_register(ndev);
413 /* protected by rtnl_lock */
414 rcu_assign_pointer(dev->ip6_ptr, ndev);
416 /* Join all-node multicast group */
417 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
422 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
424 struct inet6_dev *idev;
428 if ((idev = __in6_dev_get(dev)) == NULL) {
429 if ((idev = ipv6_add_dev(dev)) == NULL)
433 if (dev->flags&IFF_UP)
439 static void dev_forward_change(struct inet6_dev *idev)
441 struct net_device *dev;
442 struct inet6_ifaddr *ifa;
447 if (idev->cnf.forwarding)
448 dev_disable_lro(dev);
449 if (dev && (dev->flags & IFF_MULTICAST)) {
450 if (idev->cnf.forwarding)
451 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
453 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
455 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
456 if (ifa->flags&IFA_F_TENTATIVE)
458 if (idev->cnf.forwarding)
459 addrconf_join_anycast(ifa);
461 addrconf_leave_anycast(ifa);
466 static void addrconf_forward_change(struct net *net, __s32 newf)
468 struct net_device *dev;
469 struct inet6_dev *idev;
471 read_lock(&dev_base_lock);
472 for_each_netdev(net, dev) {
474 idev = __in6_dev_get(dev);
476 int changed = (!idev->cnf.forwarding) ^ (!newf);
477 idev->cnf.forwarding = newf;
479 dev_forward_change(idev);
483 read_unlock(&dev_base_lock);
486 static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
490 net = (struct net *)table->extra2;
491 if (p == &net->ipv6.devconf_dflt->forwarding)
495 if (p == &net->ipv6.devconf_all->forwarding) {
496 __s32 newf = net->ipv6.devconf_all->forwarding;
497 net->ipv6.devconf_dflt->forwarding = newf;
498 addrconf_forward_change(net, newf);
499 } else if ((!*p) ^ (!old))
500 dev_forward_change((struct inet6_dev *)table->extra1);
504 rt6_purge_dflt_routers(net);
508 /* Nobody refers to this ifaddr, destroy it */
510 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
512 BUG_TRAP(ifp->if_next==NULL);
513 BUG_TRAP(ifp->lst_next==NULL);
514 #ifdef NET_REFCNT_DEBUG
515 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
518 in6_dev_put(ifp->idev);
520 if (del_timer(&ifp->timer))
521 printk("Timer is still running, when freeing ifa=%p\n", ifp);
524 printk("Freeing alive inet6 address %p\n", ifp);
527 dst_release(&ifp->rt->u.dst);
533 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
535 struct inet6_ifaddr *ifa, **ifap;
536 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
539 * Each device address list is sorted in order of scope -
540 * global before linklocal.
542 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
543 ifap = &ifa->if_next) {
544 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
548 ifp->if_next = *ifap;
553 * Hash function taken from net_alias.c
555 static u8 ipv6_addr_hash(const struct in6_addr *addr)
560 * We perform the hash function over the last 64 bits of the address
561 * This will include the IEEE address token on links that support it.
564 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
565 word ^= (word >> 16);
568 return ((word ^ (word >> 4)) & 0x0f);
571 /* On success it returns ifp with increased reference count */
573 static struct inet6_ifaddr *
574 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
575 int scope, u32 flags)
577 struct inet6_ifaddr *ifa = NULL;
581 int addr_type = ipv6_addr_type(addr);
583 if (addr_type == IPV6_ADDR_ANY ||
584 addr_type & IPV6_ADDR_MULTICAST ||
585 (!(idev->dev->flags & IFF_LOOPBACK) &&
586 addr_type & IPV6_ADDR_LOOPBACK))
587 return ERR_PTR(-EADDRNOTAVAIL);
591 err = -ENODEV; /*XXX*/
595 write_lock(&addrconf_hash_lock);
597 /* Ignore adding duplicate addresses on an interface */
598 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
599 ADBG(("ipv6_add_addr: already assigned\n"));
604 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
607 ADBG(("ipv6_add_addr: malloc failed\n"));
612 rt = addrconf_dst_alloc(idev, addr, 0);
618 ipv6_addr_copy(&ifa->addr, addr);
620 spin_lock_init(&ifa->lock);
621 init_timer(&ifa->timer);
622 ifa->timer.data = (unsigned long) ifa;
624 ifa->prefix_len = pfxlen;
625 ifa->flags = flags | IFA_F_TENTATIVE;
626 ifa->cstamp = ifa->tstamp = jiffies;
631 * part one of RFC 4429, section 3.3
632 * We should not configure an address as
633 * optimistic if we do not yet know the link
634 * layer address of our nexhop router
637 if (rt->rt6i_nexthop == NULL)
638 ifa->flags &= ~IFA_F_OPTIMISTIC;
645 /* Add to big hash table */
646 hash = ipv6_addr_hash(addr);
648 ifa->lst_next = inet6_addr_lst[hash];
649 inet6_addr_lst[hash] = ifa;
651 write_unlock(&addrconf_hash_lock);
653 write_lock(&idev->lock);
654 /* Add to inet6_dev unicast addr list. */
655 ipv6_link_dev_addr(idev, ifa);
657 #ifdef CONFIG_IPV6_PRIVACY
658 if (ifa->flags&IFA_F_TEMPORARY) {
659 ifa->tmp_next = idev->tempaddr_list;
660 idev->tempaddr_list = ifa;
666 write_unlock(&idev->lock);
668 rcu_read_unlock_bh();
670 if (likely(err == 0))
671 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
679 write_unlock(&addrconf_hash_lock);
683 /* This function wants to get referenced ifp and releases it before return */
685 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
687 struct inet6_ifaddr *ifa, **ifap;
688 struct inet6_dev *idev = ifp->idev;
690 int deleted = 0, onlink = 0;
691 unsigned long expires = jiffies;
693 hash = ipv6_addr_hash(&ifp->addr);
697 write_lock_bh(&addrconf_hash_lock);
698 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
699 ifap = &ifa->lst_next) {
701 *ifap = ifa->lst_next;
703 ifa->lst_next = NULL;
707 write_unlock_bh(&addrconf_hash_lock);
709 write_lock_bh(&idev->lock);
710 #ifdef CONFIG_IPV6_PRIVACY
711 if (ifp->flags&IFA_F_TEMPORARY) {
712 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
713 ifap = &ifa->tmp_next) {
715 *ifap = ifa->tmp_next;
717 in6_ifa_put(ifp->ifpub);
721 ifa->tmp_next = NULL;
728 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
730 *ifap = ifa->if_next;
733 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
737 } else if (ifp->flags & IFA_F_PERMANENT) {
738 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
740 if (ifa->flags & IFA_F_PERMANENT) {
745 unsigned long lifetime;
750 spin_lock(&ifa->lock);
752 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
754 * Note: Because this address is
755 * not permanent, lifetime <
756 * LONG_MAX / HZ here.
758 if (time_before(expires,
759 ifa->tstamp + lifetime * HZ))
760 expires = ifa->tstamp + lifetime * HZ;
761 spin_unlock(&ifa->lock);
765 ifap = &ifa->if_next;
767 write_unlock_bh(&idev->lock);
769 ipv6_ifa_notify(RTM_DELADDR, ifp);
771 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
773 addrconf_del_timer(ifp);
776 * Purge or update corresponding prefix
778 * 1) we don't purge prefix here if address was not permanent.
779 * prefix is managed by its own lifetime.
780 * 2) if there're no addresses, delete prefix.
781 * 3) if there're still other permanent address(es),
782 * corresponding prefix is still permanent.
783 * 4) otherwise, update prefix lifetime to the
784 * longest valid lifetime among the corresponding
785 * addresses on the device.
786 * Note: subsequent RA will update lifetime.
790 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
791 struct in6_addr prefix;
793 struct net *net = dev_net(ifp->idev->dev);
794 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
795 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
797 if (rt && addrconf_is_prefix_route(rt)) {
801 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
802 rt->rt6i_expires = expires;
803 rt->rt6i_flags |= RTF_EXPIRES;
806 dst_release(&rt->u.dst);
812 #ifdef CONFIG_IPV6_PRIVACY
813 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
815 struct inet6_dev *idev = ifp->idev;
816 struct in6_addr addr, *tmpaddr;
817 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
818 unsigned long regen_advance;
824 write_lock(&idev->lock);
826 spin_lock_bh(&ift->lock);
827 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
828 spin_unlock_bh(&ift->lock);
835 if (idev->cnf.use_tempaddr <= 0) {
836 write_unlock(&idev->lock);
838 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
843 spin_lock_bh(&ifp->lock);
844 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
845 idev->cnf.use_tempaddr = -1; /*XXX*/
846 spin_unlock_bh(&ifp->lock);
847 write_unlock(&idev->lock);
849 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
855 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
856 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
857 spin_unlock_bh(&ifp->lock);
858 write_unlock(&idev->lock);
860 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
866 memcpy(&addr.s6_addr[8], idev->rndid, 8);
867 tmp_valid_lft = min_t(__u32,
869 idev->cnf.temp_valid_lft);
870 tmp_prefered_lft = min_t(__u32,
872 idev->cnf.temp_prefered_lft - desync_factor / HZ);
873 tmp_plen = ifp->prefix_len;
874 max_addresses = idev->cnf.max_addresses;
875 tmp_cstamp = ifp->cstamp;
876 tmp_tstamp = ifp->tstamp;
877 spin_unlock_bh(&ifp->lock);
879 regen_advance = idev->cnf.regen_max_retry *
880 idev->cnf.dad_transmits *
881 idev->nd_parms->retrans_time / HZ;
882 write_unlock(&idev->lock);
884 /* A temporary address is created only if this calculated Preferred
885 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
886 * an implementation must not create a temporary address with a zero
887 * Preferred Lifetime.
889 if (tmp_prefered_lft <= regen_advance) {
896 addr_flags = IFA_F_TEMPORARY;
897 /* set in addrconf_prefix_rcv() */
898 if (ifp->flags & IFA_F_OPTIMISTIC)
899 addr_flags |= IFA_F_OPTIMISTIC;
901 ift = !max_addresses ||
902 ipv6_count_addresses(idev) < max_addresses ?
903 ipv6_add_addr(idev, &addr, tmp_plen,
904 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
906 if (!ift || IS_ERR(ift)) {
910 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
912 write_lock(&idev->lock);
916 spin_lock_bh(&ift->lock);
918 ift->valid_lft = tmp_valid_lft;
919 ift->prefered_lft = tmp_prefered_lft;
920 ift->cstamp = tmp_cstamp;
921 ift->tstamp = tmp_tstamp;
922 spin_unlock_bh(&ift->lock);
924 addrconf_dad_start(ift, 0);
933 * Choose an appropriate source address (RFC3484)
936 IPV6_SADDR_RULE_INIT = 0,
937 IPV6_SADDR_RULE_LOCAL,
938 IPV6_SADDR_RULE_SCOPE,
939 IPV6_SADDR_RULE_PREFERRED,
940 #ifdef CONFIG_IPV6_MIP6
944 IPV6_SADDR_RULE_LABEL,
945 #ifdef CONFIG_IPV6_PRIVACY
946 IPV6_SADDR_RULE_PRIVACY,
948 IPV6_SADDR_RULE_ORCHID,
949 IPV6_SADDR_RULE_PREFIX,
953 struct ipv6_saddr_score {
956 struct inet6_ifaddr *ifa;
957 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
962 struct ipv6_saddr_dst {
963 const struct in6_addr *addr;
970 static inline int ipv6_saddr_preferred(int type)
972 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
973 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
978 static int ipv6_get_saddr_eval(struct net *net,
979 struct ipv6_saddr_score *score,
980 struct ipv6_saddr_dst *dst,
985 if (i <= score->rule) {
987 case IPV6_SADDR_RULE_SCOPE:
988 ret = score->scopedist;
990 case IPV6_SADDR_RULE_PREFIX:
991 ret = score->matchlen;
994 ret = !!test_bit(i, score->scorebits);
1000 case IPV6_SADDR_RULE_INIT:
1001 /* Rule 0: remember if hiscore is not ready yet */
1004 case IPV6_SADDR_RULE_LOCAL:
1005 /* Rule 1: Prefer same address */
1006 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1008 case IPV6_SADDR_RULE_SCOPE:
1009 /* Rule 2: Prefer appropriate scope
1014 * ---+--+-+---> scope
1016 * | d is scope of the destination.
1018 * | \ <- smaller scope is better if
1019 * B-15 | \ if scope is enough for destinaion.
1020 * | ret = B - scope (-1 <= scope >= d <= 15).
1022 * |/ <- greater is better
1023 * -C / if scope is not enough for destination.
1024 * /| ret = scope - C (-1 <= d < scope <= 15).
1026 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1027 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1028 * Assume B = 0 and we get C > 29.
1030 ret = __ipv6_addr_src_scope(score->addr_type);
1031 if (ret >= dst->scope)
1034 ret -= 128; /* 30 is enough */
1035 score->scopedist = ret;
1037 case IPV6_SADDR_RULE_PREFERRED:
1038 /* Rule 3: Avoid deprecated and optimistic addresses */
1039 ret = ipv6_saddr_preferred(score->addr_type) ||
1040 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1042 #ifdef CONFIG_IPV6_MIP6
1043 case IPV6_SADDR_RULE_HOA:
1045 /* Rule 4: Prefer home address */
1046 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1047 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1051 case IPV6_SADDR_RULE_OIF:
1052 /* Rule 5: Prefer outgoing interface */
1053 ret = (!dst->ifindex ||
1054 dst->ifindex == score->ifa->idev->dev->ifindex);
1056 case IPV6_SADDR_RULE_LABEL:
1057 /* Rule 6: Prefer matching label */
1058 ret = ipv6_addr_label(net,
1059 &score->ifa->addr, score->addr_type,
1060 score->ifa->idev->dev->ifindex) == dst->label;
1062 #ifdef CONFIG_IPV6_PRIVACY
1063 case IPV6_SADDR_RULE_PRIVACY:
1065 /* Rule 7: Prefer public address
1066 * Note: prefer temprary address if use_tempaddr >= 2
1068 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1069 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1070 score->ifa->idev->cnf.use_tempaddr >= 2;
1071 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1075 case IPV6_SADDR_RULE_ORCHID:
1076 /* Rule 8-: Prefer ORCHID vs ORCHID or
1077 * non-ORCHID vs non-ORCHID
1079 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1080 ipv6_addr_orchid(dst->addr));
1082 case IPV6_SADDR_RULE_PREFIX:
1083 /* Rule 8: Use longest matching prefix */
1084 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1092 __set_bit(i, score->scorebits);
1098 int ipv6_dev_get_saddr(struct net_device *dst_dev,
1099 const struct in6_addr *daddr, unsigned int prefs,
1100 struct in6_addr *saddr)
1102 struct ipv6_saddr_score scores[2],
1103 *score = &scores[0], *hiscore = &scores[1];
1104 struct net *net = dev_net(dst_dev);
1105 struct ipv6_saddr_dst dst;
1106 struct net_device *dev;
1109 dst_type = __ipv6_addr_type(daddr);
1111 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1112 dst.scope = __ipv6_addr_src_scope(dst_type);
1113 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
1117 hiscore->ifa = NULL;
1119 read_lock(&dev_base_lock);
1122 for_each_netdev(net, dev) {
1123 struct inet6_dev *idev;
1125 /* Candidate Source Address (section 4)
1126 * - multicast and link-local destination address,
1127 * the set of candidate source address MUST only
1128 * include addresses assigned to interfaces
1129 * belonging to the same link as the outgoing
1131 * (- For site-local destination addresses, the
1132 * set of candidate source addresses MUST only
1133 * include addresses assigned to interfaces
1134 * belonging to the same site as the outgoing
1137 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1138 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1139 dst.ifindex && dev->ifindex != dst.ifindex)
1142 idev = __in6_dev_get(dev);
1146 read_lock_bh(&idev->lock);
1147 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1151 * - Tentative Address (RFC2462 section 5.4)
1152 * - A tentative address is not considered
1153 * "assigned to an interface" in the traditional
1154 * sense, unless it is also flagged as optimistic.
1155 * - Candidate Source Address (section 4)
1156 * - In any case, anycast addresses, multicast
1157 * addresses, and the unspecified address MUST
1158 * NOT be included in a candidate set.
1160 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1161 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1164 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1166 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1167 score->addr_type & IPV6_ADDR_MULTICAST)) {
1168 LIMIT_NETDEBUG(KERN_DEBUG
1169 "ADDRCONF: unspecified / multicast address "
1170 "assigned as unicast address on %s",
1176 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1178 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1179 int minihiscore, miniscore;
1181 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1182 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
1184 if (minihiscore > miniscore) {
1185 if (i == IPV6_SADDR_RULE_SCOPE &&
1186 score->scopedist > 0) {
1189 * each remaining entry
1190 * has too small (not enough)
1191 * scope, because ifa entries
1192 * are sorted by their scope
1198 } else if (minihiscore < miniscore) {
1199 struct ipv6_saddr_score *tmp;
1202 in6_ifa_put(hiscore->ifa);
1204 in6_ifa_hold(score->ifa);
1210 /* restore our iterator */
1211 score->ifa = hiscore->ifa;
1218 read_unlock_bh(&idev->lock);
1221 read_unlock(&dev_base_lock);
1224 return -EADDRNOTAVAIL;
1226 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1227 in6_ifa_put(hiscore->ifa);
1231 EXPORT_SYMBOL(ipv6_dev_get_saddr);
1233 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1234 unsigned char banned_flags)
1236 struct inet6_dev *idev;
1237 int err = -EADDRNOTAVAIL;
1240 if ((idev = __in6_dev_get(dev)) != NULL) {
1241 struct inet6_ifaddr *ifp;
1243 read_lock_bh(&idev->lock);
1244 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1245 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1246 ipv6_addr_copy(addr, &ifp->addr);
1251 read_unlock_bh(&idev->lock);
1257 static int ipv6_count_addresses(struct inet6_dev *idev)
1260 struct inet6_ifaddr *ifp;
1262 read_lock_bh(&idev->lock);
1263 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1265 read_unlock_bh(&idev->lock);
1269 int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1270 struct net_device *dev, int strict)
1272 struct inet6_ifaddr * ifp;
1273 u8 hash = ipv6_addr_hash(addr);
1275 read_lock_bh(&addrconf_hash_lock);
1276 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1277 if (!net_eq(dev_net(ifp->idev->dev), net))
1279 if (ipv6_addr_equal(&ifp->addr, addr) &&
1280 !(ifp->flags&IFA_F_TENTATIVE)) {
1281 if (dev == NULL || ifp->idev->dev == dev ||
1282 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1286 read_unlock_bh(&addrconf_hash_lock);
1289 EXPORT_SYMBOL(ipv6_chk_addr);
1292 int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1293 struct net_device *dev)
1295 struct inet6_ifaddr * ifp;
1296 u8 hash = ipv6_addr_hash(addr);
1298 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1299 if (!net_eq(dev_net(ifp->idev->dev), net))
1301 if (ipv6_addr_equal(&ifp->addr, addr)) {
1302 if (dev == NULL || ifp->idev->dev == dev)
1309 int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1311 struct inet6_dev *idev;
1312 struct inet6_ifaddr *ifa;
1317 idev = __in6_dev_get(dev);
1319 read_lock_bh(&idev->lock);
1320 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1321 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1326 read_unlock_bh(&idev->lock);
1332 EXPORT_SYMBOL(ipv6_chk_prefix);
1334 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1335 struct net_device *dev, int strict)
1337 struct inet6_ifaddr * ifp;
1338 u8 hash = ipv6_addr_hash(addr);
1340 read_lock_bh(&addrconf_hash_lock);
1341 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1342 if (!net_eq(dev_net(ifp->idev->dev), net))
1344 if (ipv6_addr_equal(&ifp->addr, addr)) {
1345 if (dev == NULL || ifp->idev->dev == dev ||
1346 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1352 read_unlock_bh(&addrconf_hash_lock);
1357 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1359 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1360 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1361 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1362 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1363 int sk_ipv6only = ipv6_only_sock(sk);
1364 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1365 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1366 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1368 if (!sk2_rcv_saddr && !sk_ipv6only)
1371 if (addr_type2 == IPV6_ADDR_ANY &&
1372 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1375 if (addr_type == IPV6_ADDR_ANY &&
1376 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1379 if (sk2_rcv_saddr6 &&
1380 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1383 if (addr_type == IPV6_ADDR_MAPPED &&
1385 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1391 /* Gets referenced address, destroys ifaddr */
1393 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1395 if (ifp->flags&IFA_F_PERMANENT) {
1396 spin_lock_bh(&ifp->lock);
1397 addrconf_del_timer(ifp);
1398 ifp->flags |= IFA_F_TENTATIVE;
1399 spin_unlock_bh(&ifp->lock);
1401 #ifdef CONFIG_IPV6_PRIVACY
1402 } else if (ifp->flags&IFA_F_TEMPORARY) {
1403 struct inet6_ifaddr *ifpub;
1404 spin_lock_bh(&ifp->lock);
1407 in6_ifa_hold(ifpub);
1408 spin_unlock_bh(&ifp->lock);
1409 ipv6_create_tempaddr(ifpub, ifp);
1412 spin_unlock_bh(&ifp->lock);
1420 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1422 if (net_ratelimit())
1423 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1424 addrconf_dad_stop(ifp);
1427 /* Join to solicited addr multicast group. */
1429 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1431 struct in6_addr maddr;
1433 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1436 addrconf_addr_solict_mult(addr, &maddr);
1437 ipv6_dev_mc_inc(dev, &maddr);
1440 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1442 struct in6_addr maddr;
1444 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1447 addrconf_addr_solict_mult(addr, &maddr);
1448 __ipv6_dev_mc_dec(idev, &maddr);
1451 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1453 struct in6_addr addr;
1454 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1455 if (ipv6_addr_any(&addr))
1457 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1460 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1462 struct in6_addr addr;
1463 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1464 if (ipv6_addr_any(&addr))
1466 __ipv6_dev_ac_dec(ifp->idev, &addr);
1469 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1471 if (dev->addr_len != ETH_ALEN)
1473 memcpy(eui, dev->dev_addr, 3);
1474 memcpy(eui + 5, dev->dev_addr + 3, 3);
1477 * The zSeries OSA network cards can be shared among various
1478 * OS instances, but the OSA cards have only one MAC address.
1479 * This leads to duplicate address conflicts in conjunction
1480 * with IPv6 if more than one instance uses the same card.
1482 * The driver for these cards can deliver a unique 16-bit
1483 * identifier for each instance sharing the same card. It is
1484 * placed instead of 0xFFFE in the interface identifier. The
1485 * "u" bit of the interface identifier is not inverted in this
1486 * case. Hence the resulting interface identifier has local
1487 * scope according to RFC2373.
1490 eui[3] = (dev->dev_id >> 8) & 0xFF;
1491 eui[4] = dev->dev_id & 0xFF;
1500 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1502 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1503 if (dev->addr_len != ARCNET_ALEN)
1506 eui[7] = *(u8*)dev->dev_addr;
1510 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1512 if (dev->addr_len != INFINIBAND_ALEN)
1514 memcpy(eui, dev->dev_addr + 12, 8);
1519 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1521 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1522 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1523 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1524 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1525 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1526 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1530 memcpy(eui + 4, &addr, 4);
1533 EXPORT_SYMBOL(__ipv6_isatap_ifid);
1535 static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1537 if (dev->priv_flags & IFF_ISATAP)
1538 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1542 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1544 switch (dev->type) {
1547 case ARPHRD_IEEE802_TR:
1548 return addrconf_ifid_eui48(eui, dev);
1550 return addrconf_ifid_arcnet(eui, dev);
1551 case ARPHRD_INFINIBAND:
1552 return addrconf_ifid_infiniband(eui, dev);
1554 return addrconf_ifid_sit(eui, dev);
1559 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1562 struct inet6_ifaddr *ifp;
1564 read_lock_bh(&idev->lock);
1565 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1566 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1567 memcpy(eui, ifp->addr.s6_addr+8, 8);
1572 read_unlock_bh(&idev->lock);
1576 #ifdef CONFIG_IPV6_PRIVACY
1577 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1578 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1581 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1582 idev->rndid[0] &= ~0x02;
1585 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1586 * check if generated address is not inappropriate
1588 * - Reserved subnet anycast (RFC 2526)
1589 * 11111101 11....11 1xxxxxxx
1590 * - ISATAP (RFC4214) 6.1
1591 * 00-00-5E-FE-xx-xx-xx-xx
1593 * - XXX: already assigned to an address on the device
1595 if (idev->rndid[0] == 0xfd &&
1596 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1597 (idev->rndid[7]&0x80))
1599 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1600 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1602 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1609 static void ipv6_regen_rndid(unsigned long data)
1611 struct inet6_dev *idev = (struct inet6_dev *) data;
1612 unsigned long expires;
1615 write_lock_bh(&idev->lock);
1620 if (__ipv6_regen_rndid(idev) < 0)
1624 idev->cnf.temp_prefered_lft * HZ -
1625 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1626 if (time_before(expires, jiffies)) {
1628 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1633 if (!mod_timer(&idev->regen_timer, expires))
1637 write_unlock_bh(&idev->lock);
1638 rcu_read_unlock_bh();
1642 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1645 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1646 ret = __ipv6_regen_rndid(idev);
1656 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1657 unsigned long expires, u32 flags)
1659 struct fib6_config cfg = {
1660 .fc_table = RT6_TABLE_PREFIX,
1661 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1662 .fc_ifindex = dev->ifindex,
1663 .fc_expires = expires,
1665 .fc_flags = RTF_UP | flags,
1666 .fc_nlinfo.nl_net = dev_net(dev),
1669 ipv6_addr_copy(&cfg.fc_dst, pfx);
1671 /* Prevent useless cloning on PtP SIT.
1672 This thing is done here expecting that the whole
1673 class of non-broadcast devices need not cloning.
1675 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1676 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1677 cfg.fc_flags |= RTF_NONEXTHOP;
1680 ip6_route_add(&cfg);
1683 /* Create "default" multicast route to the interface */
1685 static void addrconf_add_mroute(struct net_device *dev)
1687 struct fib6_config cfg = {
1688 .fc_table = RT6_TABLE_LOCAL,
1689 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1690 .fc_ifindex = dev->ifindex,
1693 .fc_nlinfo.nl_net = dev_net(dev),
1696 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1698 ip6_route_add(&cfg);
1701 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1702 static void sit_route_add(struct net_device *dev)
1704 struct fib6_config cfg = {
1705 .fc_table = RT6_TABLE_MAIN,
1706 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1707 .fc_ifindex = dev->ifindex,
1709 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1710 .fc_nlinfo.nl_net = dev_net(dev),
1713 /* prefix length - 96 bits "::d.d.d.d" */
1714 ip6_route_add(&cfg);
1718 static void addrconf_add_lroute(struct net_device *dev)
1720 struct in6_addr addr;
1722 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1723 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1726 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1728 struct inet6_dev *idev;
1732 if ((idev = ipv6_find_idev(dev)) == NULL)
1735 /* Add default multicast route */
1736 addrconf_add_mroute(dev);
1738 /* Add link local route */
1739 addrconf_add_lroute(dev);
1743 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1745 struct prefix_info *pinfo;
1749 struct inet6_dev *in6_dev;
1751 pinfo = (struct prefix_info *) opt;
1753 if (len < sizeof(struct prefix_info)) {
1754 ADBG(("addrconf: prefix option too short\n"));
1759 * Validation checks ([ADDRCONF], page 19)
1762 addr_type = ipv6_addr_type(&pinfo->prefix);
1764 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1767 valid_lft = ntohl(pinfo->valid);
1768 prefered_lft = ntohl(pinfo->prefered);
1770 if (prefered_lft > valid_lft) {
1771 if (net_ratelimit())
1772 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1776 in6_dev = in6_dev_get(dev);
1778 if (in6_dev == NULL) {
1779 if (net_ratelimit())
1780 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1785 * Two things going on here:
1786 * 1) Add routes for on-link prefixes
1787 * 2) Configure prefixes with the auto flag set
1790 if (pinfo->onlink) {
1791 struct rt6_info *rt;
1792 unsigned long rt_expires;
1794 /* Avoid arithmetic overflow. Really, we could
1795 * save rt_expires in seconds, likely valid_lft,
1796 * but it would require division in fib gc, that it
1800 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1802 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
1804 if (addrconf_finite_timeout(rt_expires))
1807 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
1810 if (rt && addrconf_is_prefix_route(rt)) {
1811 /* Autoconf prefix route */
1812 if (valid_lft == 0) {
1815 } else if (addrconf_finite_timeout(rt_expires)) {
1817 rt->rt6i_expires = jiffies + rt_expires;
1818 rt->rt6i_flags |= RTF_EXPIRES;
1820 rt->rt6i_flags &= ~RTF_EXPIRES;
1821 rt->rt6i_expires = 0;
1823 } else if (valid_lft) {
1824 clock_t expires = 0;
1825 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1826 if (addrconf_finite_timeout(rt_expires)) {
1828 flags |= RTF_EXPIRES;
1829 expires = jiffies_to_clock_t(rt_expires);
1831 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1832 dev, expires, flags);
1835 dst_release(&rt->u.dst);
1838 /* Try to figure out our local address for this prefix */
1840 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1841 struct inet6_ifaddr * ifp;
1842 struct in6_addr addr;
1843 int create = 0, update_lft = 0;
1845 if (pinfo->prefix_len == 64) {
1846 memcpy(&addr, &pinfo->prefix, 8);
1847 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1848 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1849 in6_dev_put(in6_dev);
1854 if (net_ratelimit())
1855 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1857 in6_dev_put(in6_dev);
1862 ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1);
1864 if (ifp == NULL && valid_lft) {
1865 int max_addresses = in6_dev->cnf.max_addresses;
1868 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1869 if (in6_dev->cnf.optimistic_dad &&
1870 !ipv6_devconf.forwarding)
1871 addr_flags = IFA_F_OPTIMISTIC;
1874 /* Do not allow to create too much of autoconfigured
1875 * addresses; this would be too easy way to crash kernel.
1877 if (!max_addresses ||
1878 ipv6_count_addresses(in6_dev) < max_addresses)
1879 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1880 addr_type&IPV6_ADDR_SCOPE_MASK,
1883 if (!ifp || IS_ERR(ifp)) {
1884 in6_dev_put(in6_dev);
1888 update_lft = create = 1;
1889 ifp->cstamp = jiffies;
1890 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1896 #ifdef CONFIG_IPV6_PRIVACY
1897 struct inet6_ifaddr *ift;
1901 /* update lifetime (RFC2462 5.5.3 e) */
1902 spin_lock(&ifp->lock);
1904 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1905 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1908 if (!update_lft && stored_lft) {
1909 if (valid_lft > MIN_VALID_LIFETIME ||
1910 valid_lft > stored_lft)
1912 else if (stored_lft <= MIN_VALID_LIFETIME) {
1913 /* valid_lft <= stored_lft is always true */
1917 valid_lft = MIN_VALID_LIFETIME;
1918 if (valid_lft < prefered_lft)
1919 prefered_lft = valid_lft;
1925 ifp->valid_lft = valid_lft;
1926 ifp->prefered_lft = prefered_lft;
1929 ifp->flags &= ~IFA_F_DEPRECATED;
1930 spin_unlock(&ifp->lock);
1932 if (!(flags&IFA_F_TENTATIVE))
1933 ipv6_ifa_notify(0, ifp);
1935 spin_unlock(&ifp->lock);
1937 #ifdef CONFIG_IPV6_PRIVACY
1938 read_lock_bh(&in6_dev->lock);
1939 /* update all temporary addresses in the list */
1940 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1942 * When adjusting the lifetimes of an existing
1943 * temporary address, only lower the lifetimes.
1944 * Implementations must not increase the
1945 * lifetimes of an existing temporary address
1946 * when processing a Prefix Information Option.
1948 if (ifp != ift->ifpub)
1951 spin_lock(&ift->lock);
1953 if (ift->valid_lft > valid_lft &&
1954 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1955 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1956 if (ift->prefered_lft > prefered_lft &&
1957 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1958 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1959 spin_unlock(&ift->lock);
1960 if (!(flags&IFA_F_TENTATIVE))
1961 ipv6_ifa_notify(0, ift);
1964 if (create && in6_dev->cnf.use_tempaddr > 0) {
1966 * When a new public address is created as described in [ADDRCONF],
1967 * also create a new temporary address.
1969 read_unlock_bh(&in6_dev->lock);
1970 ipv6_create_tempaddr(ifp, NULL);
1972 read_unlock_bh(&in6_dev->lock);
1979 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1980 in6_dev_put(in6_dev);
1984 * Set destination address.
1985 * Special case for SIT interfaces where we create a new "virtual"
1988 int addrconf_set_dstaddr(struct net *net, void __user *arg)
1990 struct in6_ifreq ireq;
1991 struct net_device *dev;
1997 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2000 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
2006 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2007 if (dev->type == ARPHRD_SIT) {
2010 struct ip_tunnel_parm p;
2012 err = -EADDRNOTAVAIL;
2013 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2016 memset(&p, 0, sizeof(p));
2017 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2021 p.iph.protocol = IPPROTO_IPV6;
2023 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
2025 oldfs = get_fs(); set_fs(KERNEL_DS);
2026 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2031 dev = __dev_get_by_name(net, p.name);
2034 err = dev_open(dev);
2045 * Manual configuration of address on an interface
2047 static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
2048 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
2051 struct inet6_ifaddr *ifp;
2052 struct inet6_dev *idev;
2053 struct net_device *dev;
2057 unsigned long timeout;
2064 /* check the lifetime */
2065 if (!valid_lft || prefered_lft > valid_lft)
2068 dev = __dev_get_by_index(net, ifindex);
2072 if ((idev = addrconf_add_dev(dev)) == NULL)
2075 scope = ipv6_addr_scope(pfx);
2077 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2078 if (addrconf_finite_timeout(timeout)) {
2079 expires = jiffies_to_clock_t(timeout * HZ);
2080 valid_lft = timeout;
2081 flags = RTF_EXPIRES;
2085 ifa_flags |= IFA_F_PERMANENT;
2088 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2089 if (addrconf_finite_timeout(timeout)) {
2091 ifa_flags |= IFA_F_DEPRECATED;
2092 prefered_lft = timeout;
2095 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2098 spin_lock_bh(&ifp->lock);
2099 ifp->valid_lft = valid_lft;
2100 ifp->prefered_lft = prefered_lft;
2101 ifp->tstamp = jiffies;
2102 spin_unlock_bh(&ifp->lock);
2104 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2107 * Note that section 3.1 of RFC 4429 indicates
2108 * that the Optimistic flag should not be set for
2109 * manually configured addresses
2111 addrconf_dad_start(ifp, 0);
2117 return PTR_ERR(ifp);
2120 static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
2123 struct inet6_ifaddr *ifp;
2124 struct inet6_dev *idev;
2125 struct net_device *dev;
2130 dev = __dev_get_by_index(net, ifindex);
2134 if ((idev = __in6_dev_get(dev)) == NULL)
2137 read_lock_bh(&idev->lock);
2138 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2139 if (ifp->prefix_len == plen &&
2140 ipv6_addr_equal(pfx, &ifp->addr)) {
2142 read_unlock_bh(&idev->lock);
2146 /* If the last address is deleted administratively,
2147 disable IPv6 on this interface.
2149 if (idev->addr_list == NULL)
2150 addrconf_ifdown(idev->dev, 1);
2154 read_unlock_bh(&idev->lock);
2155 return -EADDRNOTAVAIL;
2159 int addrconf_add_ifaddr(struct net *net, void __user *arg)
2161 struct in6_ifreq ireq;
2164 if (!capable(CAP_NET_ADMIN))
2167 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2171 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2172 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2173 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2178 int addrconf_del_ifaddr(struct net *net, void __user *arg)
2180 struct in6_ifreq ireq;
2183 if (!capable(CAP_NET_ADMIN))
2186 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2190 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2191 ireq.ifr6_prefixlen);
2196 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2197 static void sit_add_v4_addrs(struct inet6_dev *idev)
2199 struct inet6_ifaddr * ifp;
2200 struct in6_addr addr;
2201 struct net_device *dev;
2202 struct net *net = dev_net(idev->dev);
2207 memset(&addr, 0, sizeof(struct in6_addr));
2208 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2210 if (idev->dev->flags&IFF_POINTOPOINT) {
2211 addr.s6_addr32[0] = htonl(0xfe800000);
2214 scope = IPV6_ADDR_COMPATv4;
2217 if (addr.s6_addr32[3]) {
2218 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2220 spin_lock_bh(&ifp->lock);
2221 ifp->flags &= ~IFA_F_TENTATIVE;
2222 spin_unlock_bh(&ifp->lock);
2223 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2229 for_each_netdev(net, dev) {
2230 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2231 if (in_dev && (dev->flags & IFF_UP)) {
2232 struct in_ifaddr * ifa;
2236 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2239 addr.s6_addr32[3] = ifa->ifa_local;
2241 if (ifa->ifa_scope == RT_SCOPE_LINK)
2243 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2244 if (idev->dev->flags&IFF_POINTOPOINT)
2248 if (idev->dev->flags&IFF_POINTOPOINT)
2253 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2256 spin_lock_bh(&ifp->lock);
2257 ifp->flags &= ~IFA_F_TENTATIVE;
2258 spin_unlock_bh(&ifp->lock);
2259 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2268 static void init_loopback(struct net_device *dev)
2270 struct inet6_dev *idev;
2271 struct inet6_ifaddr * ifp;
2277 if ((idev = ipv6_find_idev(dev)) == NULL) {
2278 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2282 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2284 spin_lock_bh(&ifp->lock);
2285 ifp->flags &= ~IFA_F_TENTATIVE;
2286 spin_unlock_bh(&ifp->lock);
2287 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2292 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2294 struct inet6_ifaddr * ifp;
2295 u32 addr_flags = IFA_F_PERMANENT;
2297 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2298 if (idev->cnf.optimistic_dad &&
2299 !ipv6_devconf.forwarding)
2300 addr_flags |= IFA_F_OPTIMISTIC;
2304 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2306 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2307 addrconf_dad_start(ifp, 0);
2312 static void addrconf_dev_config(struct net_device *dev)
2314 struct in6_addr addr;
2315 struct inet6_dev * idev;
2319 if ((dev->type != ARPHRD_ETHER) &&
2320 (dev->type != ARPHRD_FDDI) &&
2321 (dev->type != ARPHRD_IEEE802_TR) &&
2322 (dev->type != ARPHRD_ARCNET) &&
2323 (dev->type != ARPHRD_INFINIBAND)) {
2324 /* Alas, we support only Ethernet autoconfiguration. */
2328 idev = addrconf_add_dev(dev);
2332 memset(&addr, 0, sizeof(struct in6_addr));
2333 addr.s6_addr32[0] = htonl(0xFE800000);
2335 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2336 addrconf_add_linklocal(idev, &addr);
2339 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2340 static void addrconf_sit_config(struct net_device *dev)
2342 struct inet6_dev *idev;
2347 * Configure the tunnel with one of our IPv4
2348 * addresses... we should configure all of
2349 * our v4 addrs in the tunnel
2352 if ((idev = ipv6_find_idev(dev)) == NULL) {
2353 printk(KERN_DEBUG "init sit: add_dev failed\n");
2357 if (dev->priv_flags & IFF_ISATAP) {
2358 struct in6_addr addr;
2360 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2361 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2362 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2363 addrconf_add_linklocal(idev, &addr);
2367 sit_add_v4_addrs(idev);
2369 if (dev->flags&IFF_POINTOPOINT) {
2370 addrconf_add_mroute(dev);
2371 addrconf_add_lroute(dev);
2378 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2380 struct in6_addr lladdr;
2382 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2383 addrconf_add_linklocal(idev, &lladdr);
2389 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2391 struct net_device *link_dev;
2392 struct net *net = dev_net(idev->dev);
2394 /* first try to inherit the link-local address from the link device */
2395 if (idev->dev->iflink &&
2396 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
2397 if (!ipv6_inherit_linklocal(idev, link_dev))
2400 /* then try to inherit it from any device */
2401 for_each_netdev(net, link_dev) {
2402 if (!ipv6_inherit_linklocal(idev, link_dev))
2405 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2409 * Autoconfigure tunnel with a link-local address so routing protocols,
2410 * DHCPv6, MLD etc. can be run over the virtual link
2413 static void addrconf_ip6_tnl_config(struct net_device *dev)
2415 struct inet6_dev *idev;
2419 if ((idev = addrconf_add_dev(dev)) == NULL) {
2420 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2423 ip6_tnl_add_linklocal(idev);
2426 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2429 struct net_device *dev = (struct net_device *) data;
2430 struct inet6_dev *idev = __in6_dev_get(dev);
2431 int run_pending = 0;
2435 case NETDEV_REGISTER:
2436 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2437 idev = ipv6_add_dev(dev);
2439 return notifier_from_errno(-ENOMEM);
2444 if (dev->flags & IFF_SLAVE)
2447 if (event == NETDEV_UP) {
2448 if (!addrconf_qdisc_ok(dev)) {
2449 /* device is not ready yet. */
2451 "ADDRCONF(NETDEV_UP): %s: "
2452 "link is not ready\n",
2457 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2458 idev = ipv6_add_dev(dev);
2461 idev->if_flags |= IF_READY;
2463 if (!addrconf_qdisc_ok(dev)) {
2464 /* device is still not ready. */
2469 if (idev->if_flags & IF_READY) {
2470 /* device is already configured. */
2473 idev->if_flags |= IF_READY;
2477 "ADDRCONF(NETDEV_CHANGE): %s: "
2478 "link becomes ready\n",
2485 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2487 addrconf_sit_config(dev);
2490 case ARPHRD_TUNNEL6:
2491 addrconf_ip6_tnl_config(dev);
2493 case ARPHRD_LOOPBACK:
2498 addrconf_dev_config(dev);
2503 addrconf_dad_run(idev);
2505 /* If the MTU changed during the interface down, when the
2506 interface up, the changed MTU must be reflected in the
2507 idev as well as routers.
2509 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2510 rt6_mtu_change(dev, dev->mtu);
2511 idev->cnf.mtu6 = dev->mtu;
2513 idev->tstamp = jiffies;
2514 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2515 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2516 stop IPv6 on this interface.
2518 if (dev->mtu < IPV6_MIN_MTU)
2519 addrconf_ifdown(dev, event != NETDEV_DOWN);
2523 case NETDEV_CHANGEMTU:
2524 if (idev && dev->mtu >= IPV6_MIN_MTU) {
2525 rt6_mtu_change(dev, dev->mtu);
2526 idev->cnf.mtu6 = dev->mtu;
2530 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2531 idev = ipv6_add_dev(dev);
2536 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2539 case NETDEV_UNREGISTER:
2541 * Remove all addresses from this interface.
2543 addrconf_ifdown(dev, event != NETDEV_DOWN);
2546 case NETDEV_CHANGENAME:
2548 snmp6_unregister_dev(idev);
2549 addrconf_sysctl_unregister(idev);
2550 addrconf_sysctl_register(idev);
2551 err = snmp6_register_dev(idev);
2553 return notifier_from_errno(err);
2562 * addrconf module should be notified of a device going up
2564 static struct notifier_block ipv6_dev_notf = {
2565 .notifier_call = addrconf_notify,
2569 static int addrconf_ifdown(struct net_device *dev, int how)
2571 struct inet6_dev *idev;
2572 struct inet6_ifaddr *ifa, **bifa;
2573 struct net *net = dev_net(dev);
2578 if ((dev->flags & IFF_LOOPBACK) && how == 1)
2581 rt6_ifdown(net, dev);
2582 neigh_ifdown(&nd_tbl, dev);
2584 idev = __in6_dev_get(dev);
2588 /* Step 1: remove reference to ipv6 device from parent device.
2594 /* protected by rtnl_lock */
2595 rcu_assign_pointer(dev->ip6_ptr, NULL);
2597 /* Step 1.5: remove snmp6 entry */
2598 snmp6_unregister_dev(idev);
2602 /* Step 2: clear hash table */
2603 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2604 bifa = &inet6_addr_lst[i];
2606 write_lock_bh(&addrconf_hash_lock);
2607 while ((ifa = *bifa) != NULL) {
2608 if (ifa->idev == idev) {
2609 *bifa = ifa->lst_next;
2610 ifa->lst_next = NULL;
2611 addrconf_del_timer(ifa);
2615 bifa = &ifa->lst_next;
2617 write_unlock_bh(&addrconf_hash_lock);
2620 write_lock_bh(&idev->lock);
2622 /* Step 3: clear flags for stateless addrconf */
2624 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2626 /* Step 4: clear address list */
2627 #ifdef CONFIG_IPV6_PRIVACY
2628 if (how && del_timer(&idev->regen_timer))
2631 /* clear tempaddr list */
2632 while ((ifa = idev->tempaddr_list) != NULL) {
2633 idev->tempaddr_list = ifa->tmp_next;
2634 ifa->tmp_next = NULL;
2636 write_unlock_bh(&idev->lock);
2637 spin_lock_bh(&ifa->lock);
2640 in6_ifa_put(ifa->ifpub);
2643 spin_unlock_bh(&ifa->lock);
2645 write_lock_bh(&idev->lock);
2648 while ((ifa = idev->addr_list) != NULL) {
2649 idev->addr_list = ifa->if_next;
2650 ifa->if_next = NULL;
2652 addrconf_del_timer(ifa);
2653 write_unlock_bh(&idev->lock);
2655 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2656 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2659 write_lock_bh(&idev->lock);
2661 write_unlock_bh(&idev->lock);
2663 /* Step 5: Discard multicast list */
2666 ipv6_mc_destroy_dev(idev);
2670 idev->tstamp = jiffies;
2672 /* Shot the device (if unregistered) */
2675 addrconf_sysctl_unregister(idev);
2676 neigh_parms_release(&nd_tbl, idev->nd_parms);
2677 neigh_ifdown(&nd_tbl, dev);
2683 static void addrconf_rs_timer(unsigned long data)
2685 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2687 if (ifp->idev->cnf.forwarding)
2690 if (ifp->idev->if_flags & IF_RA_RCVD) {
2692 * Announcement received after solicitation
2698 spin_lock(&ifp->lock);
2699 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2700 /* The wait after the last probe can be shorter */
2701 addrconf_mod_timer(ifp, AC_RS,
2702 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2703 ifp->idev->cnf.rtr_solicit_delay :
2704 ifp->idev->cnf.rtr_solicit_interval);
2705 spin_unlock(&ifp->lock);
2707 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2709 spin_unlock(&ifp->lock);
2711 * Note: we do not support deprecated "all on-link"
2712 * assumption any longer.
2714 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2715 ifp->idev->dev->name);
2723 * Duplicate Address Detection
2725 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2727 unsigned long rand_num;
2728 struct inet6_dev *idev = ifp->idev;
2730 if (ifp->flags & IFA_F_OPTIMISTIC)
2733 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2735 ifp->probes = idev->cnf.dad_transmits;
2736 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2739 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2741 struct inet6_dev *idev = ifp->idev;
2742 struct net_device *dev = idev->dev;
2744 addrconf_join_solict(dev, &ifp->addr);
2746 net_srandom(ifp->addr.s6_addr32[3]);
2748 read_lock_bh(&idev->lock);
2751 spin_lock_bh(&ifp->lock);
2753 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2754 !(ifp->flags&IFA_F_TENTATIVE) ||
2755 ifp->flags & IFA_F_NODAD) {
2756 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2757 spin_unlock_bh(&ifp->lock);
2758 read_unlock_bh(&idev->lock);
2760 addrconf_dad_completed(ifp);
2764 if (!(idev->if_flags & IF_READY)) {
2765 spin_unlock_bh(&ifp->lock);
2766 read_unlock_bh(&idev->lock);
2768 * If the defice is not ready:
2769 * - keep it tentative if it is a permanent address.
2770 * - otherwise, kill it.
2773 addrconf_dad_stop(ifp);
2778 * Optimistic nodes can start receiving
2781 if(ifp->flags & IFA_F_OPTIMISTIC)
2782 ip6_ins_rt(ifp->rt);
2784 addrconf_dad_kick(ifp);
2785 spin_unlock_bh(&ifp->lock);
2787 read_unlock_bh(&idev->lock);
2790 static void addrconf_dad_timer(unsigned long data)
2792 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2793 struct inet6_dev *idev = ifp->idev;
2794 struct in6_addr mcaddr;
2796 read_lock_bh(&idev->lock);
2798 read_unlock_bh(&idev->lock);
2801 spin_lock_bh(&ifp->lock);
2802 if (ifp->probes == 0) {
2804 * DAD was successful
2807 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2808 spin_unlock_bh(&ifp->lock);
2809 read_unlock_bh(&idev->lock);
2811 addrconf_dad_completed(ifp);
2817 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2818 spin_unlock_bh(&ifp->lock);
2819 read_unlock_bh(&idev->lock);
2821 /* send a neighbour solicitation for our addr */
2822 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2823 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
2828 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2830 struct net_device * dev = ifp->idev->dev;
2833 * Configure the address for reception. Now it is valid.
2836 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2838 /* If added prefix is link local and forwarding is off,
2839 start sending router solicitations.
2842 if (ifp->idev->cnf.forwarding == 0 &&
2843 ifp->idev->cnf.rtr_solicits > 0 &&
2844 (dev->flags&IFF_LOOPBACK) == 0 &&
2845 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2847 * If a host as already performed a random delay
2848 * [...] as part of DAD [...] there is no need
2849 * to delay again before sending the first RS
2851 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2853 spin_lock_bh(&ifp->lock);
2855 ifp->idev->if_flags |= IF_RS_SENT;
2856 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2857 spin_unlock_bh(&ifp->lock);
2861 static void addrconf_dad_run(struct inet6_dev *idev) {
2862 struct inet6_ifaddr *ifp;
2864 read_lock_bh(&idev->lock);
2865 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2866 spin_lock_bh(&ifp->lock);
2867 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2868 spin_unlock_bh(&ifp->lock);
2871 spin_unlock_bh(&ifp->lock);
2872 addrconf_dad_kick(ifp);
2874 read_unlock_bh(&idev->lock);
2877 #ifdef CONFIG_PROC_FS
2878 struct if6_iter_state {
2879 struct seq_net_private p;
2883 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2885 struct inet6_ifaddr *ifa = NULL;
2886 struct if6_iter_state *state = seq->private;
2887 struct net *net = seq_file_net(seq);
2889 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2890 ifa = inet6_addr_lst[state->bucket];
2892 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
2893 ifa = ifa->lst_next;
2900 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2902 struct if6_iter_state *state = seq->private;
2903 struct net *net = seq_file_net(seq);
2905 ifa = ifa->lst_next;
2908 if (!net_eq(dev_net(ifa->idev->dev), net)) {
2909 ifa = ifa->lst_next;
2914 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2915 ifa = inet6_addr_lst[state->bucket];
2922 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2924 struct inet6_ifaddr *ifa = if6_get_first(seq);
2927 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2929 return pos ? NULL : ifa;
2932 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2933 __acquires(addrconf_hash_lock)
2935 read_lock_bh(&addrconf_hash_lock);
2936 return if6_get_idx(seq, *pos);
2939 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2941 struct inet6_ifaddr *ifa;
2943 ifa = if6_get_next(seq, v);
2948 static void if6_seq_stop(struct seq_file *seq, void *v)
2949 __releases(addrconf_hash_lock)
2951 read_unlock_bh(&addrconf_hash_lock);
2954 static int if6_seq_show(struct seq_file *seq, void *v)
2956 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2958 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2960 ifp->idev->dev->ifindex,
2964 ifp->idev->dev->name);
2968 static const struct seq_operations if6_seq_ops = {
2969 .start = if6_seq_start,
2970 .next = if6_seq_next,
2971 .show = if6_seq_show,
2972 .stop = if6_seq_stop,
2975 static int if6_seq_open(struct inode *inode, struct file *file)
2977 return seq_open_net(inode, file, &if6_seq_ops,
2978 sizeof(struct if6_iter_state));
2981 static const struct file_operations if6_fops = {
2982 .owner = THIS_MODULE,
2983 .open = if6_seq_open,
2985 .llseek = seq_lseek,
2986 .release = seq_release_net,
2989 static int if6_proc_net_init(struct net *net)
2991 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
2996 static void if6_proc_net_exit(struct net *net)
2998 proc_net_remove(net, "if_inet6");
3001 static struct pernet_operations if6_proc_net_ops = {
3002 .init = if6_proc_net_init,
3003 .exit = if6_proc_net_exit,
3006 int __init if6_proc_init(void)
3008 return register_pernet_subsys(&if6_proc_net_ops);
3011 void if6_proc_exit(void)
3013 unregister_pernet_subsys(&if6_proc_net_ops);
3015 #endif /* CONFIG_PROC_FS */
3017 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3018 /* Check if address is a home address configured on any interface. */
3019 int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3022 struct inet6_ifaddr * ifp;
3023 u8 hash = ipv6_addr_hash(addr);
3024 read_lock_bh(&addrconf_hash_lock);
3025 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
3026 if (!net_eq(dev_net(ifp->idev->dev), net))
3028 if (ipv6_addr_equal(&ifp->addr, addr) &&
3029 (ifp->flags & IFA_F_HOMEADDRESS)) {
3034 read_unlock_bh(&addrconf_hash_lock);
3040 * Periodic address status verification
3043 static void addrconf_verify(unsigned long foo)
3045 struct inet6_ifaddr *ifp;
3046 unsigned long now, next;
3049 spin_lock_bh(&addrconf_verify_lock);
3051 next = now + ADDR_CHECK_FREQUENCY;
3053 del_timer(&addr_chk_timer);
3055 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3058 read_lock(&addrconf_hash_lock);
3059 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3061 #ifdef CONFIG_IPV6_PRIVACY
3062 unsigned long regen_advance;
3065 if (ifp->flags & IFA_F_PERMANENT)
3068 spin_lock(&ifp->lock);
3069 age = (now - ifp->tstamp) / HZ;
3071 #ifdef CONFIG_IPV6_PRIVACY
3072 regen_advance = ifp->idev->cnf.regen_max_retry *
3073 ifp->idev->cnf.dad_transmits *
3074 ifp->idev->nd_parms->retrans_time / HZ;
3077 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3078 age >= ifp->valid_lft) {
3079 spin_unlock(&ifp->lock);
3081 read_unlock(&addrconf_hash_lock);
3084 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3085 spin_unlock(&ifp->lock);
3087 } else if (age >= ifp->prefered_lft) {
3088 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3091 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3093 ifp->flags |= IFA_F_DEPRECATED;
3096 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3097 next = ifp->tstamp + ifp->valid_lft * HZ;
3099 spin_unlock(&ifp->lock);
3103 read_unlock(&addrconf_hash_lock);
3105 ipv6_ifa_notify(0, ifp);
3109 #ifdef CONFIG_IPV6_PRIVACY
3110 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3111 !(ifp->flags&IFA_F_TENTATIVE)) {
3112 if (age >= ifp->prefered_lft - regen_advance) {
3113 struct inet6_ifaddr *ifpub = ifp->ifpub;
3114 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3115 next = ifp->tstamp + ifp->prefered_lft * HZ;
3116 if (!ifp->regen_count && ifpub) {
3119 in6_ifa_hold(ifpub);
3120 spin_unlock(&ifp->lock);
3121 read_unlock(&addrconf_hash_lock);
3122 spin_lock(&ifpub->lock);
3123 ifpub->regen_count = 0;
3124 spin_unlock(&ifpub->lock);
3125 ipv6_create_tempaddr(ifpub, ifp);
3130 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3131 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3132 spin_unlock(&ifp->lock);
3135 /* ifp->prefered_lft <= ifp->valid_lft */
3136 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3137 next = ifp->tstamp + ifp->prefered_lft * HZ;
3138 spin_unlock(&ifp->lock);
3141 read_unlock(&addrconf_hash_lock);
3144 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3145 add_timer(&addr_chk_timer);
3146 spin_unlock_bh(&addrconf_verify_lock);
3149 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3151 struct in6_addr *pfx = NULL;
3154 pfx = nla_data(addr);
3157 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3160 pfx = nla_data(local);
3166 static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3167 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3168 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3169 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3173 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3175 struct net *net = sock_net(skb->sk);
3176 struct ifaddrmsg *ifm;
3177 struct nlattr *tb[IFA_MAX+1];
3178 struct in6_addr *pfx;
3181 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3185 ifm = nlmsg_data(nlh);
3186 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3190 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3193 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3194 u32 prefered_lft, u32 valid_lft)
3198 unsigned long timeout;
3200 if (!valid_lft || (prefered_lft > valid_lft))
3203 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3204 if (addrconf_finite_timeout(timeout)) {
3205 expires = jiffies_to_clock_t(timeout * HZ);
3206 valid_lft = timeout;
3207 flags = RTF_EXPIRES;
3211 ifa_flags |= IFA_F_PERMANENT;
3214 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3215 if (addrconf_finite_timeout(timeout)) {
3217 ifa_flags |= IFA_F_DEPRECATED;
3218 prefered_lft = timeout;
3221 spin_lock_bh(&ifp->lock);
3222 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3223 ifp->tstamp = jiffies;
3224 ifp->valid_lft = valid_lft;
3225 ifp->prefered_lft = prefered_lft;
3227 spin_unlock_bh(&ifp->lock);
3228 if (!(ifp->flags&IFA_F_TENTATIVE))
3229 ipv6_ifa_notify(0, ifp);
3231 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3239 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3241 struct net *net = sock_net(skb->sk);
3242 struct ifaddrmsg *ifm;
3243 struct nlattr *tb[IFA_MAX+1];
3244 struct in6_addr *pfx;
3245 struct inet6_ifaddr *ifa;
3246 struct net_device *dev;
3247 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3251 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3255 ifm = nlmsg_data(nlh);
3256 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3260 if (tb[IFA_CACHEINFO]) {
3261 struct ifa_cacheinfo *ci;
3263 ci = nla_data(tb[IFA_CACHEINFO]);
3264 valid_lft = ci->ifa_valid;
3265 preferred_lft = ci->ifa_prefered;
3267 preferred_lft = INFINITY_LIFE_TIME;
3268 valid_lft = INFINITY_LIFE_TIME;
3271 dev = __dev_get_by_index(net, ifm->ifa_index);
3275 /* We ignore other flags so far. */
3276 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3278 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
3281 * It would be best to check for !NLM_F_CREATE here but
3282 * userspace alreay relies on not having to provide this.
3284 return inet6_addr_add(net, ifm->ifa_index, pfx,
3285 ifm->ifa_prefixlen, ifa_flags,
3286 preferred_lft, valid_lft);
3289 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3290 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3293 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3300 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3301 u8 scope, int ifindex)
3303 struct ifaddrmsg *ifm;
3305 ifm = nlmsg_data(nlh);
3306 ifm->ifa_family = AF_INET6;
3307 ifm->ifa_prefixlen = prefixlen;
3308 ifm->ifa_flags = flags;
3309 ifm->ifa_scope = scope;
3310 ifm->ifa_index = ifindex;
3313 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3314 unsigned long tstamp, u32 preferred, u32 valid)
3316 struct ifa_cacheinfo ci;
3318 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3319 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3320 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3321 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3322 ci.ifa_prefered = preferred;
3323 ci.ifa_valid = valid;
3325 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3328 static inline int rt_scope(int ifa_scope)
3330 if (ifa_scope & IFA_HOST)
3331 return RT_SCOPE_HOST;
3332 else if (ifa_scope & IFA_LINK)
3333 return RT_SCOPE_LINK;
3334 else if (ifa_scope & IFA_SITE)
3335 return RT_SCOPE_SITE;
3337 return RT_SCOPE_UNIVERSE;
3340 static inline int inet6_ifaddr_msgsize(void)
3342 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3343 + nla_total_size(16) /* IFA_ADDRESS */
3344 + nla_total_size(sizeof(struct ifa_cacheinfo));
3347 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3348 u32 pid, u32 seq, int event, unsigned int flags)
3350 struct nlmsghdr *nlh;
3351 u32 preferred, valid;
3353 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3357 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3358 ifa->idev->dev->ifindex);
3360 if (!(ifa->flags&IFA_F_PERMANENT)) {
3361 preferred = ifa->prefered_lft;
3362 valid = ifa->valid_lft;
3363 if (preferred != INFINITY_LIFE_TIME) {
3364 long tval = (jiffies - ifa->tstamp)/HZ;
3366 if (valid != INFINITY_LIFE_TIME)
3370 preferred = INFINITY_LIFE_TIME;
3371 valid = INFINITY_LIFE_TIME;
3374 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3375 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3376 nlmsg_cancel(skb, nlh);
3380 return nlmsg_end(skb, nlh);
3383 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3384 u32 pid, u32 seq, int event, u16 flags)
3386 struct nlmsghdr *nlh;
3387 u8 scope = RT_SCOPE_UNIVERSE;
3388 int ifindex = ifmca->idev->dev->ifindex;
3390 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3391 scope = RT_SCOPE_SITE;
3393 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3397 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3398 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3399 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3400 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3401 nlmsg_cancel(skb, nlh);
3405 return nlmsg_end(skb, nlh);
3408 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3409 u32 pid, u32 seq, int event, unsigned int flags)
3411 struct nlmsghdr *nlh;
3412 u8 scope = RT_SCOPE_UNIVERSE;
3413 int ifindex = ifaca->aca_idev->dev->ifindex;
3415 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3416 scope = RT_SCOPE_SITE;
3418 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3422 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3423 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3424 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3425 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3426 nlmsg_cancel(skb, nlh);
3430 return nlmsg_end(skb, nlh);
3440 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3441 enum addr_type_t type)
3444 int s_idx, s_ip_idx;
3446 struct net_device *dev;
3447 struct inet6_dev *idev = NULL;
3448 struct inet6_ifaddr *ifa;
3449 struct ifmcaddr6 *ifmca;
3450 struct ifacaddr6 *ifaca;
3451 struct net *net = sock_net(skb->sk);
3453 s_idx = cb->args[0];
3454 s_ip_idx = ip_idx = cb->args[1];
3457 for_each_netdev(net, dev) {
3463 if ((idev = in6_dev_get(dev)) == NULL)
3465 read_lock_bh(&idev->lock);
3468 /* unicast address incl. temp addr */
3469 for (ifa = idev->addr_list; ifa;
3470 ifa = ifa->if_next, ip_idx++) {
3471 if (ip_idx < s_ip_idx)
3473 err = inet6_fill_ifaddr(skb, ifa,
3474 NETLINK_CB(cb->skb).pid,
3480 case MULTICAST_ADDR:
3481 /* multicast address */
3482 for (ifmca = idev->mc_list; ifmca;
3483 ifmca = ifmca->next, ip_idx++) {
3484 if (ip_idx < s_ip_idx)
3486 err = inet6_fill_ifmcaddr(skb, ifmca,
3487 NETLINK_CB(cb->skb).pid,
3494 /* anycast address */
3495 for (ifaca = idev->ac_list; ifaca;
3496 ifaca = ifaca->aca_next, ip_idx++) {
3497 if (ip_idx < s_ip_idx)
3499 err = inet6_fill_ifacaddr(skb, ifaca,
3500 NETLINK_CB(cb->skb).pid,
3509 read_unlock_bh(&idev->lock);
3518 cb->args[1] = ip_idx;
3522 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3524 enum addr_type_t type = UNICAST_ADDR;
3526 return inet6_dump_addr(skb, cb, type);
3529 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3531 enum addr_type_t type = MULTICAST_ADDR;
3533 return inet6_dump_addr(skb, cb, type);
3537 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3539 enum addr_type_t type = ANYCAST_ADDR;
3541 return inet6_dump_addr(skb, cb, type);
3544 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3547 struct net *net = sock_net(in_skb->sk);
3548 struct ifaddrmsg *ifm;
3549 struct nlattr *tb[IFA_MAX+1];
3550 struct in6_addr *addr = NULL;
3551 struct net_device *dev = NULL;
3552 struct inet6_ifaddr *ifa;
3553 struct sk_buff *skb;
3556 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3560 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3566 ifm = nlmsg_data(nlh);
3568 dev = __dev_get_by_index(net, ifm->ifa_index);
3570 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
3571 err = -EADDRNOTAVAIL;
3575 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3580 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3581 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3583 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3584 WARN_ON(err == -EMSGSIZE);
3588 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
3595 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3597 struct sk_buff *skb;
3598 struct net *net = dev_net(ifa->idev->dev);
3601 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3605 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3607 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3608 WARN_ON(err == -EMSGSIZE);
3612 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3615 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3618 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3619 __s32 *array, int bytes)
3621 BUG_ON(bytes < (DEVCONF_MAX * 4));
3623 memset(array, 0, bytes);
3624 array[DEVCONF_FORWARDING] = cnf->forwarding;
3625 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3626 array[DEVCONF_MTU6] = cnf->mtu6;
3627 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3628 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3629 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3630 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3631 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3632 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3633 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3634 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3635 #ifdef CONFIG_IPV6_PRIVACY
3636 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3637 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3638 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3639 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3640 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3642 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3643 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3644 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3645 #ifdef CONFIG_IPV6_ROUTER_PREF
3646 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3647 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3648 #ifdef CONFIG_IPV6_ROUTE_INFO
3649 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3652 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3653 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3654 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3655 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3657 #ifdef CONFIG_IPV6_MROUTE
3658 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3662 static inline size_t inet6_if_nlmsg_size(void)
3664 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3665 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3666 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3667 + nla_total_size(4) /* IFLA_MTU */
3668 + nla_total_size(4) /* IFLA_LINK */
3669 + nla_total_size( /* IFLA_PROTINFO */
3670 nla_total_size(4) /* IFLA_INET6_FLAGS */
3671 + nla_total_size(sizeof(struct ifla_cacheinfo))
3672 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3673 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3674 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3678 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3682 int pad = bytes - sizeof(u64) * items;
3685 /* Use put_unaligned() because stats may not be aligned for u64. */
3686 put_unaligned(items, &stats[0]);
3687 for (i = 1; i < items; i++)
3688 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3690 memset(&stats[items], 0, pad);
3693 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3697 case IFLA_INET6_STATS:
3698 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3700 case IFLA_INET6_ICMP6STATS:
3701 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3706 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3707 u32 pid, u32 seq, int event, unsigned int flags)
3709 struct net_device *dev = idev->dev;
3711 struct ifinfomsg *hdr;
3712 struct nlmsghdr *nlh;
3714 struct ifla_cacheinfo ci;
3716 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3720 hdr = nlmsg_data(nlh);
3721 hdr->ifi_family = AF_INET6;
3723 hdr->ifi_type = dev->type;
3724 hdr->ifi_index = dev->ifindex;
3725 hdr->ifi_flags = dev_get_flags(dev);
3726 hdr->ifi_change = 0;
3728 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3731 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3733 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3734 if (dev->ifindex != dev->iflink)
3735 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3737 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3738 if (protoinfo == NULL)
3739 goto nla_put_failure;
3741 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3743 ci.max_reasm_len = IPV6_MAXPLEN;
3744 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3745 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3746 ci.reachable_time = idev->nd_parms->reachable_time;
3747 ci.retrans_time = idev->nd_parms->retrans_time;
3748 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3750 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3752 goto nla_put_failure;
3753 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3755 /* XXX - MC not implemented */
3757 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3759 goto nla_put_failure;
3760 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3762 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3764 goto nla_put_failure;
3765 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3767 nla_nest_end(skb, protoinfo);
3768 return nlmsg_end(skb, nlh);
3771 nlmsg_cancel(skb, nlh);
3775 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3777 struct net *net = sock_net(skb->sk);
3779 int s_idx = cb->args[0];
3780 struct net_device *dev;
3781 struct inet6_dev *idev;
3783 read_lock(&dev_base_lock);
3785 for_each_netdev(net, dev) {
3788 if ((idev = in6_dev_get(dev)) == NULL)
3790 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3791 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3798 read_unlock(&dev_base_lock);
3804 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3806 struct sk_buff *skb;
3807 struct net *net = dev_net(idev->dev);
3810 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3814 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3816 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3817 WARN_ON(err == -EMSGSIZE);
3821 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3824 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3827 static inline size_t inet6_prefix_nlmsg_size(void)
3829 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3830 + nla_total_size(sizeof(struct in6_addr))
3831 + nla_total_size(sizeof(struct prefix_cacheinfo));
3834 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3835 struct prefix_info *pinfo, u32 pid, u32 seq,
3836 int event, unsigned int flags)
3838 struct prefixmsg *pmsg;
3839 struct nlmsghdr *nlh;
3840 struct prefix_cacheinfo ci;
3842 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3846 pmsg = nlmsg_data(nlh);
3847 pmsg->prefix_family = AF_INET6;
3848 pmsg->prefix_pad1 = 0;
3849 pmsg->prefix_pad2 = 0;
3850 pmsg->prefix_ifindex = idev->dev->ifindex;
3851 pmsg->prefix_len = pinfo->prefix_len;
3852 pmsg->prefix_type = pinfo->type;
3853 pmsg->prefix_pad3 = 0;
3854 pmsg->prefix_flags = 0;
3856 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3857 if (pinfo->autoconf)
3858 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3860 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3862 ci.preferred_time = ntohl(pinfo->prefered);
3863 ci.valid_time = ntohl(pinfo->valid);
3864 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3866 return nlmsg_end(skb, nlh);
3869 nlmsg_cancel(skb, nlh);
3873 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3874 struct prefix_info *pinfo)
3876 struct sk_buff *skb;
3877 struct net *net = dev_net(idev->dev);
3880 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3884 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3886 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3887 WARN_ON(err == -EMSGSIZE);
3891 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3894 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
3897 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3899 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3904 * If the address was optimistic
3905 * we inserted the route at the start of
3906 * our DAD process, so we don't need
3909 if (!(ifp->rt->rt6i_node))
3910 ip6_ins_rt(ifp->rt);
3911 if (ifp->idev->cnf.forwarding)
3912 addrconf_join_anycast(ifp);
3915 if (ifp->idev->cnf.forwarding)
3916 addrconf_leave_anycast(ifp);
3917 addrconf_leave_solict(ifp->idev, &ifp->addr);
3918 dst_hold(&ifp->rt->u.dst);
3919 if (ip6_del_rt(ifp->rt))
3920 dst_free(&ifp->rt->u.dst);
3925 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3928 if (likely(ifp->idev->dead == 0))
3929 __ipv6_ifa_notify(event, ifp);
3930 rcu_read_unlock_bh();
3933 #ifdef CONFIG_SYSCTL
3936 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3937 void __user *buffer, size_t *lenp, loff_t *ppos)
3939 int *valp = ctl->data;
3943 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3946 addrconf_fixup_forwarding(ctl, valp, val);
3950 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3951 int __user *name, int nlen,
3952 void __user *oldval,
3953 size_t __user *oldlenp,
3954 void __user *newval, size_t newlen)
3956 int *valp = table->data;
3960 if (!newval || !newlen)
3962 if (newlen != sizeof(int))
3964 if (get_user(new, (int __user *)newval))
3968 if (oldval && oldlenp) {
3970 if (get_user(len, oldlenp))
3973 if (len > table->maxlen)
3974 len = table->maxlen;
3975 if (copy_to_user(oldval, valp, len))
3977 if (put_user(len, oldlenp))
3983 addrconf_fixup_forwarding(table, valp, val);
3987 static struct addrconf_sysctl_table
3989 struct ctl_table_header *sysctl_header;
3990 ctl_table addrconf_vars[DEVCONF_MAX+1];
3992 } addrconf_sysctl __read_mostly = {
3993 .sysctl_header = NULL,
3996 .ctl_name = NET_IPV6_FORWARDING,
3997 .procname = "forwarding",
3998 .data = &ipv6_devconf.forwarding,
3999 .maxlen = sizeof(int),
4001 .proc_handler = &addrconf_sysctl_forward,
4002 .strategy = &addrconf_sysctl_forward_strategy,
4005 .ctl_name = NET_IPV6_HOP_LIMIT,
4006 .procname = "hop_limit",
4007 .data = &ipv6_devconf.hop_limit,
4008 .maxlen = sizeof(int),
4010 .proc_handler = proc_dointvec,
4013 .ctl_name = NET_IPV6_MTU,
4015 .data = &ipv6_devconf.mtu6,
4016 .maxlen = sizeof(int),
4018 .proc_handler = &proc_dointvec,
4021 .ctl_name = NET_IPV6_ACCEPT_RA,
4022 .procname = "accept_ra",
4023 .data = &ipv6_devconf.accept_ra,
4024 .maxlen = sizeof(int),
4026 .proc_handler = &proc_dointvec,
4029 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4030 .procname = "accept_redirects",
4031 .data = &ipv6_devconf.accept_redirects,
4032 .maxlen = sizeof(int),
4034 .proc_handler = &proc_dointvec,
4037 .ctl_name = NET_IPV6_AUTOCONF,
4038 .procname = "autoconf",
4039 .data = &ipv6_devconf.autoconf,
4040 .maxlen = sizeof(int),
4042 .proc_handler = &proc_dointvec,
4045 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4046 .procname = "dad_transmits",
4047 .data = &ipv6_devconf.dad_transmits,
4048 .maxlen = sizeof(int),
4050 .proc_handler = &proc_dointvec,
4053 .ctl_name = NET_IPV6_RTR_SOLICITS,
4054 .procname = "router_solicitations",
4055 .data = &ipv6_devconf.rtr_solicits,
4056 .maxlen = sizeof(int),
4058 .proc_handler = &proc_dointvec,
4061 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4062 .procname = "router_solicitation_interval",
4063 .data = &ipv6_devconf.rtr_solicit_interval,
4064 .maxlen = sizeof(int),
4066 .proc_handler = &proc_dointvec_jiffies,
4067 .strategy = &sysctl_jiffies,
4070 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4071 .procname = "router_solicitation_delay",
4072 .data = &ipv6_devconf.rtr_solicit_delay,
4073 .maxlen = sizeof(int),
4075 .proc_handler = &proc_dointvec_jiffies,
4076 .strategy = &sysctl_jiffies,
4079 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4080 .procname = "force_mld_version",
4081 .data = &ipv6_devconf.force_mld_version,
4082 .maxlen = sizeof(int),
4084 .proc_handler = &proc_dointvec,
4086 #ifdef CONFIG_IPV6_PRIVACY
4088 .ctl_name = NET_IPV6_USE_TEMPADDR,
4089 .procname = "use_tempaddr",
4090 .data = &ipv6_devconf.use_tempaddr,
4091 .maxlen = sizeof(int),
4093 .proc_handler = &proc_dointvec,
4096 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4097 .procname = "temp_valid_lft",
4098 .data = &ipv6_devconf.temp_valid_lft,
4099 .maxlen = sizeof(int),
4101 .proc_handler = &proc_dointvec,
4104 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4105 .procname = "temp_prefered_lft",
4106 .data = &ipv6_devconf.temp_prefered_lft,
4107 .maxlen = sizeof(int),
4109 .proc_handler = &proc_dointvec,
4112 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4113 .procname = "regen_max_retry",
4114 .data = &ipv6_devconf.regen_max_retry,
4115 .maxlen = sizeof(int),
4117 .proc_handler = &proc_dointvec,
4120 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4121 .procname = "max_desync_factor",
4122 .data = &ipv6_devconf.max_desync_factor,
4123 .maxlen = sizeof(int),
4125 .proc_handler = &proc_dointvec,
4129 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4130 .procname = "max_addresses",
4131 .data = &ipv6_devconf.max_addresses,
4132 .maxlen = sizeof(int),
4134 .proc_handler = &proc_dointvec,
4137 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4138 .procname = "accept_ra_defrtr",
4139 .data = &ipv6_devconf.accept_ra_defrtr,
4140 .maxlen = sizeof(int),
4142 .proc_handler = &proc_dointvec,
4145 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4146 .procname = "accept_ra_pinfo",
4147 .data = &ipv6_devconf.accept_ra_pinfo,
4148 .maxlen = sizeof(int),
4150 .proc_handler = &proc_dointvec,
4152 #ifdef CONFIG_IPV6_ROUTER_PREF
4154 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4155 .procname = "accept_ra_rtr_pref",
4156 .data = &ipv6_devconf.accept_ra_rtr_pref,
4157 .maxlen = sizeof(int),
4159 .proc_handler = &proc_dointvec,
4162 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4163 .procname = "router_probe_interval",
4164 .data = &ipv6_devconf.rtr_probe_interval,
4165 .maxlen = sizeof(int),
4167 .proc_handler = &proc_dointvec_jiffies,
4168 .strategy = &sysctl_jiffies,
4170 #ifdef CONFIG_IPV6_ROUTE_INFO
4172 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4173 .procname = "accept_ra_rt_info_max_plen",
4174 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4175 .maxlen = sizeof(int),
4177 .proc_handler = &proc_dointvec,
4182 .ctl_name = NET_IPV6_PROXY_NDP,
4183 .procname = "proxy_ndp",
4184 .data = &ipv6_devconf.proxy_ndp,
4185 .maxlen = sizeof(int),
4187 .proc_handler = &proc_dointvec,
4190 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4191 .procname = "accept_source_route",
4192 .data = &ipv6_devconf.accept_source_route,
4193 .maxlen = sizeof(int),
4195 .proc_handler = &proc_dointvec,
4197 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4199 .ctl_name = CTL_UNNUMBERED,
4200 .procname = "optimistic_dad",
4201 .data = &ipv6_devconf.optimistic_dad,
4202 .maxlen = sizeof(int),
4204 .proc_handler = &proc_dointvec,
4208 #ifdef CONFIG_IPV6_MROUTE
4210 .ctl_name = CTL_UNNUMBERED,
4211 .procname = "mc_forwarding",
4212 .data = &ipv6_devconf.mc_forwarding,
4213 .maxlen = sizeof(int),
4215 .proc_handler = &proc_dointvec,
4219 .ctl_name = 0, /* sentinel */
4224 static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4225 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
4228 struct addrconf_sysctl_table *t;
4230 #define ADDRCONF_CTL_PATH_DEV 3
4232 struct ctl_path addrconf_ctl_path[] = {
4233 { .procname = "net", .ctl_name = CTL_NET, },
4234 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4235 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4236 { /* to be set */ },
4241 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4245 for (i=0; t->addrconf_vars[i].data; i++) {
4246 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4247 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4248 t->addrconf_vars[i].extra2 = net;
4252 * Make a copy of dev_name, because '.procname' is regarded as const
4253 * by sysctl and we wouldn't want anyone to change it under our feet
4254 * (see SIOCSIFNAME).
4256 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4260 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4261 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
4263 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
4265 if (t->sysctl_header == NULL)
4279 static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4281 struct addrconf_sysctl_table *t;
4283 if (p->sysctl == NULL)
4288 unregister_sysctl_table(t->sysctl_header);
4293 static void addrconf_sysctl_register(struct inet6_dev *idev)
4295 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4296 NET_IPV6_NEIGH, "ipv6",
4297 &ndisc_ifinfo_sysctl_change,
4298 ndisc_ifinfo_sysctl_strategy);
4299 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4300 idev->dev->ifindex, idev, &idev->cnf);
4303 static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4305 __addrconf_sysctl_unregister(&idev->cnf);
4306 neigh_sysctl_unregister(idev->nd_parms);
4312 static int addrconf_init_net(struct net *net)
4315 struct ipv6_devconf *all, *dflt;
4318 all = &ipv6_devconf;
4319 dflt = &ipv6_devconf_dflt;
4321 if (net != &init_net) {
4322 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4326 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4328 goto err_alloc_dflt;
4331 net->ipv6.devconf_all = all;
4332 net->ipv6.devconf_dflt = dflt;
4334 #ifdef CONFIG_SYSCTL
4335 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4340 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4347 #ifdef CONFIG_SYSCTL
4349 __addrconf_sysctl_unregister(all);
4359 static void addrconf_exit_net(struct net *net)
4361 #ifdef CONFIG_SYSCTL
4362 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4363 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4365 if (net != &init_net) {
4366 kfree(net->ipv6.devconf_dflt);
4367 kfree(net->ipv6.devconf_all);
4371 static struct pernet_operations addrconf_ops = {
4372 .init = addrconf_init_net,
4373 .exit = addrconf_exit_net,
4380 int register_inet6addr_notifier(struct notifier_block *nb)
4382 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4385 EXPORT_SYMBOL(register_inet6addr_notifier);
4387 int unregister_inet6addr_notifier(struct notifier_block *nb)
4389 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4392 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4394 static void addrconf_net_exit(struct net *net)
4396 struct net_device *dev;
4399 /* clean dev list */
4400 for_each_netdev(net, dev) {
4401 if (__in6_dev_get(dev) == NULL)
4403 addrconf_ifdown(dev, 1);
4405 addrconf_ifdown(net->loopback_dev, 2);
4409 static struct pernet_operations addrconf_net_ops = {
4410 .exit = addrconf_net_exit,
4414 * Init / cleanup code
4417 int __init addrconf_init(void)
4421 if ((err = ipv6_addr_label_init()) < 0) {
4422 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4427 register_pernet_subsys(&addrconf_ops);
4429 /* The addrconf netdev notifier requires that loopback_dev
4430 * has it's ipv6 private information allocated and setup
4431 * before it can bring up and give link-local addresses
4432 * to other devices which are up.
4434 * Unfortunately, loopback_dev is not necessarily the first
4435 * entry in the global dev_base list of net devices. In fact,
4436 * it is likely to be the very last entry on that list.
4437 * So this causes the notifier registry below to try and
4438 * give link-local addresses to all devices besides loopback_dev
4439 * first, then loopback_dev, which cases all the non-loopback_dev
4440 * devices to fail to get a link-local address.
4442 * So, as a temporary fix, allocate the ipv6 structure for
4443 * loopback_dev first by hand.
4444 * Longer term, all of the dependencies ipv6 has upon the loopback
4445 * device and it being up should be removed.
4448 if (!ipv6_add_dev(init_net.loopback_dev))
4454 err = register_pernet_device(&addrconf_net_ops);
4458 register_netdevice_notifier(&ipv6_dev_notf);
4462 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4466 /* Only the first call to __rtnl_register can fail */
4467 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4468 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4469 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4470 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4471 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4473 ipv6_addr_label_rtnl_register();
4477 unregister_netdevice_notifier(&ipv6_dev_notf);
4479 unregister_pernet_subsys(&addrconf_ops);
4484 void addrconf_cleanup(void)
4486 struct inet6_ifaddr *ifa;
4489 unregister_netdevice_notifier(&ipv6_dev_notf);
4490 unregister_pernet_device(&addrconf_net_ops);
4492 unregister_pernet_subsys(&addrconf_ops);
4499 write_lock_bh(&addrconf_hash_lock);
4500 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4501 for (ifa=inet6_addr_lst[i]; ifa; ) {
4502 struct inet6_ifaddr *bifa;
4505 ifa = ifa->lst_next;
4506 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4507 /* Do not free it; something is wrong.
4508 Now we can investigate it with debugger.
4512 write_unlock_bh(&addrconf_hash_lock);
4514 del_timer(&addr_chk_timer);
4517 unregister_pernet_subsys(&addrconf_net_ops);