2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <net/pkt_sched.h>
78 #include <linux/if_tunnel.h>
79 #include <linux/rtnetlink.h>
81 #ifdef CONFIG_IPV6_PRIVACY
82 #include <linux/random.h>
85 #include <asm/uaccess.h>
86 #include <asm/unaligned.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
91 /* Set to 3 to get tracing... */
95 #define ADBG(x) printk x
100 #define INFINITY_LIFE_TIME 0xFFFFFFFF
101 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
104 static void addrconf_sysctl_register(struct inet6_dev *idev);
105 static void addrconf_sysctl_unregister(struct inet6_dev *idev);
107 static inline void addrconf_sysctl_register(struct inet6_dev *idev)
111 static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
116 #ifdef CONFIG_IPV6_PRIVACY
117 static int __ipv6_regen_rndid(struct inet6_dev *idev);
118 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
119 static void ipv6_regen_rndid(unsigned long data);
121 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
124 static int ipv6_count_addresses(struct inet6_dev *idev);
127 * Configured unicast address hash table
129 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130 static DEFINE_RWLOCK(addrconf_hash_lock);
132 static void addrconf_verify(unsigned long);
134 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
135 static DEFINE_SPINLOCK(addrconf_verify_lock);
137 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
140 static int addrconf_ifdown(struct net_device *dev, int how);
142 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
143 static void addrconf_dad_timer(unsigned long data);
144 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
145 static void addrconf_dad_run(struct inet6_dev *idev);
146 static void addrconf_rs_timer(unsigned long data);
147 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
150 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
151 struct prefix_info *pinfo);
152 static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
153 struct net_device *dev);
155 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
157 struct ipv6_devconf ipv6_devconf __read_mostly = {
159 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
160 .mtu6 = IPV6_MIN_MTU,
162 .accept_redirects = 1,
164 .force_mld_version = 0,
166 .rtr_solicits = MAX_RTR_SOLICITATIONS,
167 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
168 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
169 #ifdef CONFIG_IPV6_PRIVACY
171 .temp_valid_lft = TEMP_VALID_LIFETIME,
172 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
173 .regen_max_retry = REGEN_MAX_RETRY,
174 .max_desync_factor = MAX_DESYNC_FACTOR,
176 .max_addresses = IPV6_MAX_ADDRESSES,
177 .accept_ra_defrtr = 1,
178 .accept_ra_pinfo = 1,
179 #ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref = 1,
181 .rtr_probe_interval = 60 * HZ,
182 #ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen = 0,
187 .accept_source_route = 0, /* we do not accept RH0 by default. */
190 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
192 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
193 .mtu6 = IPV6_MIN_MTU,
195 .accept_redirects = 1,
198 .rtr_solicits = MAX_RTR_SOLICITATIONS,
199 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
200 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
201 #ifdef CONFIG_IPV6_PRIVACY
203 .temp_valid_lft = TEMP_VALID_LIFETIME,
204 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
205 .regen_max_retry = REGEN_MAX_RETRY,
206 .max_desync_factor = MAX_DESYNC_FACTOR,
208 .max_addresses = IPV6_MAX_ADDRESSES,
209 .accept_ra_defrtr = 1,
210 .accept_ra_pinfo = 1,
211 #ifdef CONFIG_IPV6_ROUTER_PREF
212 .accept_ra_rtr_pref = 1,
213 .rtr_probe_interval = 60 * HZ,
214 #ifdef CONFIG_IPV6_ROUTE_INFO
215 .accept_ra_rt_info_max_plen = 0,
219 .accept_source_route = 0, /* we do not accept RH0 by default. */
222 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
223 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
224 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
225 const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
226 const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
228 /* Check if a valid qdisc is available */
229 static inline int addrconf_qdisc_ok(struct net_device *dev)
231 return (dev->qdisc != &noop_qdisc);
234 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
236 if (del_timer(&ifp->timer))
240 enum addrconf_timer_t
247 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
248 enum addrconf_timer_t what,
251 if (!del_timer(&ifp->timer))
256 ifp->timer.function = addrconf_dad_timer;
259 ifp->timer.function = addrconf_rs_timer;
263 ifp->timer.expires = jiffies + when;
264 add_timer(&ifp->timer);
267 static int snmp6_alloc_dev(struct inet6_dev *idev)
269 if (snmp_mib_init((void **)idev->stats.ipv6,
270 sizeof(struct ipstats_mib)) < 0)
272 if (snmp_mib_init((void **)idev->stats.icmpv6,
273 sizeof(struct icmpv6_mib)) < 0)
275 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
276 sizeof(struct icmpv6msg_mib)) < 0)
282 snmp_mib_free((void **)idev->stats.icmpv6);
284 snmp_mib_free((void **)idev->stats.ipv6);
289 static void snmp6_free_dev(struct inet6_dev *idev)
291 snmp_mib_free((void **)idev->stats.icmpv6msg);
292 snmp_mib_free((void **)idev->stats.icmpv6);
293 snmp_mib_free((void **)idev->stats.ipv6);
296 /* Nobody refers to this device, we may destroy it. */
298 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
300 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
304 void in6_dev_finish_destroy(struct inet6_dev *idev)
306 struct net_device *dev = idev->dev;
307 BUG_TRAP(idev->addr_list==NULL);
308 BUG_TRAP(idev->mc_list==NULL);
309 #ifdef NET_REFCNT_DEBUG
310 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
314 printk("Freeing alive inet6 device %p\n", idev);
317 snmp6_free_dev(idev);
318 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
321 EXPORT_SYMBOL(in6_dev_finish_destroy);
323 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
325 struct inet6_dev *ndev;
329 if (dev->mtu < IPV6_MIN_MTU)
332 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
337 rwlock_init(&ndev->lock);
339 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
340 ndev->cnf.mtu6 = dev->mtu;
341 ndev->cnf.sysctl = NULL;
342 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
343 if (ndev->nd_parms == NULL) {
347 /* We refer to the device */
350 if (snmp6_alloc_dev(ndev) < 0) {
352 "%s(): cannot allocate memory for statistics; dev=%s.\n",
353 __func__, dev->name));
354 neigh_parms_release(&nd_tbl, ndev->nd_parms);
356 in6_dev_finish_destroy(ndev);
360 if (snmp6_register_dev(ndev) < 0) {
362 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
363 __func__, dev->name));
364 neigh_parms_release(&nd_tbl, ndev->nd_parms);
366 in6_dev_finish_destroy(ndev);
370 /* One reference from device. We must do this before
371 * we invoke __ipv6_regen_rndid().
375 #ifdef CONFIG_IPV6_PRIVACY
376 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
377 if ((dev->flags&IFF_LOOPBACK) ||
378 dev->type == ARPHRD_TUNNEL ||
379 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
380 dev->type == ARPHRD_SIT ||
382 dev->type == ARPHRD_NONE) {
384 "%s: Disabled Privacy Extensions\n",
386 ndev->cnf.use_tempaddr = -1;
388 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
390 "%s: Disabled Multicast RS\n",
392 ndev->cnf.rtr_solicits = 0;
396 ipv6_regen_rndid((unsigned long) ndev);
400 if (netif_running(dev) && addrconf_qdisc_ok(dev))
401 ndev->if_flags |= IF_READY;
403 ipv6_mc_init_dev(ndev);
404 ndev->tstamp = jiffies;
405 addrconf_sysctl_register(ndev);
406 /* protected by rtnl_lock */
407 rcu_assign_pointer(dev->ip6_ptr, ndev);
409 /* Join all-node multicast group */
410 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
415 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
417 struct inet6_dev *idev;
421 if ((idev = __in6_dev_get(dev)) == NULL) {
422 if ((idev = ipv6_add_dev(dev)) == NULL)
426 if (dev->flags&IFF_UP)
432 static void dev_forward_change(struct inet6_dev *idev)
434 struct net_device *dev;
435 struct inet6_ifaddr *ifa;
440 if (dev && (dev->flags & IFF_MULTICAST)) {
441 if (idev->cnf.forwarding)
442 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
444 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
446 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
447 if (ifa->flags&IFA_F_TENTATIVE)
449 if (idev->cnf.forwarding)
450 addrconf_join_anycast(ifa);
452 addrconf_leave_anycast(ifa);
457 static void addrconf_forward_change(struct net *net, __s32 newf)
459 struct net_device *dev;
460 struct inet6_dev *idev;
462 read_lock(&dev_base_lock);
463 for_each_netdev(net, dev) {
465 idev = __in6_dev_get(dev);
467 int changed = (!idev->cnf.forwarding) ^ (!newf);
468 idev->cnf.forwarding = newf;
470 dev_forward_change(idev);
474 read_unlock(&dev_base_lock);
477 static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
481 net = (struct net *)table->extra2;
482 if (p == &net->ipv6.devconf_dflt->forwarding)
485 if (p == &net->ipv6.devconf_all->forwarding) {
486 __s32 newf = net->ipv6.devconf_all->forwarding;
487 net->ipv6.devconf_dflt->forwarding = newf;
488 addrconf_forward_change(net, newf);
489 } else if ((!*p) ^ (!old))
490 dev_forward_change((struct inet6_dev *)table->extra1);
493 rt6_purge_dflt_routers(net);
497 /* Nobody refers to this ifaddr, destroy it */
499 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
501 BUG_TRAP(ifp->if_next==NULL);
502 BUG_TRAP(ifp->lst_next==NULL);
503 #ifdef NET_REFCNT_DEBUG
504 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
507 in6_dev_put(ifp->idev);
509 if (del_timer(&ifp->timer))
510 printk("Timer is still running, when freeing ifa=%p\n", ifp);
513 printk("Freeing alive inet6 address %p\n", ifp);
516 dst_release(&ifp->rt->u.dst);
522 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
524 struct inet6_ifaddr *ifa, **ifap;
525 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
528 * Each device address list is sorted in order of scope -
529 * global before linklocal.
531 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
532 ifap = &ifa->if_next) {
533 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
537 ifp->if_next = *ifap;
542 * Hash function taken from net_alias.c
544 static u8 ipv6_addr_hash(const struct in6_addr *addr)
549 * We perform the hash function over the last 64 bits of the address
550 * This will include the IEEE address token on links that support it.
553 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
554 word ^= (word >> 16);
557 return ((word ^ (word >> 4)) & 0x0f);
560 /* On success it returns ifp with increased reference count */
562 static struct inet6_ifaddr *
563 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
564 int scope, u32 flags)
566 struct inet6_ifaddr *ifa = NULL;
573 err = -ENODEV; /*XXX*/
577 write_lock(&addrconf_hash_lock);
579 /* Ignore adding duplicate addresses on an interface */
580 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
581 ADBG(("ipv6_add_addr: already assigned\n"));
586 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
589 ADBG(("ipv6_add_addr: malloc failed\n"));
594 rt = addrconf_dst_alloc(idev, addr, 0);
600 ipv6_addr_copy(&ifa->addr, addr);
602 spin_lock_init(&ifa->lock);
603 init_timer(&ifa->timer);
604 ifa->timer.data = (unsigned long) ifa;
606 ifa->prefix_len = pfxlen;
607 ifa->flags = flags | IFA_F_TENTATIVE;
608 ifa->cstamp = ifa->tstamp = jiffies;
613 * part one of RFC 4429, section 3.3
614 * We should not configure an address as
615 * optimistic if we do not yet know the link
616 * layer address of our nexhop router
619 if (rt->rt6i_nexthop == NULL)
620 ifa->flags &= ~IFA_F_OPTIMISTIC;
627 /* Add to big hash table */
628 hash = ipv6_addr_hash(addr);
630 ifa->lst_next = inet6_addr_lst[hash];
631 inet6_addr_lst[hash] = ifa;
633 write_unlock(&addrconf_hash_lock);
635 write_lock(&idev->lock);
636 /* Add to inet6_dev unicast addr list. */
637 ipv6_link_dev_addr(idev, ifa);
639 #ifdef CONFIG_IPV6_PRIVACY
640 if (ifa->flags&IFA_F_TEMPORARY) {
641 ifa->tmp_next = idev->tempaddr_list;
642 idev->tempaddr_list = ifa;
648 write_unlock(&idev->lock);
650 rcu_read_unlock_bh();
652 if (likely(err == 0))
653 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
661 write_unlock(&addrconf_hash_lock);
665 /* This function wants to get referenced ifp and releases it before return */
667 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
669 struct inet6_ifaddr *ifa, **ifap;
670 struct inet6_dev *idev = ifp->idev;
672 int deleted = 0, onlink = 0;
673 unsigned long expires = jiffies;
675 hash = ipv6_addr_hash(&ifp->addr);
679 write_lock_bh(&addrconf_hash_lock);
680 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
681 ifap = &ifa->lst_next) {
683 *ifap = ifa->lst_next;
685 ifa->lst_next = NULL;
689 write_unlock_bh(&addrconf_hash_lock);
691 write_lock_bh(&idev->lock);
692 #ifdef CONFIG_IPV6_PRIVACY
693 if (ifp->flags&IFA_F_TEMPORARY) {
694 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
695 ifap = &ifa->tmp_next) {
697 *ifap = ifa->tmp_next;
699 in6_ifa_put(ifp->ifpub);
703 ifa->tmp_next = NULL;
710 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
712 *ifap = ifa->if_next;
715 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
719 } else if (ifp->flags & IFA_F_PERMANENT) {
720 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
722 if (ifa->flags & IFA_F_PERMANENT) {
727 unsigned long lifetime;
732 spin_lock(&ifa->lock);
733 lifetime = min_t(unsigned long,
734 ifa->valid_lft, 0x7fffffffUL/HZ);
735 if (time_before(expires,
736 ifa->tstamp + lifetime * HZ))
737 expires = ifa->tstamp + lifetime * HZ;
738 spin_unlock(&ifa->lock);
742 ifap = &ifa->if_next;
744 write_unlock_bh(&idev->lock);
746 ipv6_ifa_notify(RTM_DELADDR, ifp);
748 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
750 addrconf_del_timer(ifp);
753 * Purge or update corresponding prefix
755 * 1) we don't purge prefix here if address was not permanent.
756 * prefix is managed by its own lifetime.
757 * 2) if there're no addresses, delete prefix.
758 * 3) if there're still other permanent address(es),
759 * corresponding prefix is still permanent.
760 * 4) otherwise, update prefix lifetime to the
761 * longest valid lifetime among the corresponding
762 * addresses on the device.
763 * Note: subsequent RA will update lifetime.
767 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
768 struct in6_addr prefix;
770 struct net *net = dev_net(ifp->idev->dev);
771 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
772 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
774 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
778 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
779 rt->rt6i_expires = expires;
780 rt->rt6i_flags |= RTF_EXPIRES;
783 dst_release(&rt->u.dst);
789 #ifdef CONFIG_IPV6_PRIVACY
790 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
792 struct inet6_dev *idev = ifp->idev;
793 struct in6_addr addr, *tmpaddr;
794 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
795 unsigned long regen_advance;
801 write_lock(&idev->lock);
803 spin_lock_bh(&ift->lock);
804 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
805 spin_unlock_bh(&ift->lock);
812 if (idev->cnf.use_tempaddr <= 0) {
813 write_unlock(&idev->lock);
815 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
820 spin_lock_bh(&ifp->lock);
821 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
822 idev->cnf.use_tempaddr = -1; /*XXX*/
823 spin_unlock_bh(&ifp->lock);
824 write_unlock(&idev->lock);
826 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
832 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
833 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
834 spin_unlock_bh(&ifp->lock);
835 write_unlock(&idev->lock);
837 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
843 memcpy(&addr.s6_addr[8], idev->rndid, 8);
844 tmp_valid_lft = min_t(__u32,
846 idev->cnf.temp_valid_lft);
847 tmp_prefered_lft = min_t(__u32,
849 idev->cnf.temp_prefered_lft - desync_factor / HZ);
850 tmp_plen = ifp->prefix_len;
851 max_addresses = idev->cnf.max_addresses;
852 tmp_cstamp = ifp->cstamp;
853 tmp_tstamp = ifp->tstamp;
854 spin_unlock_bh(&ifp->lock);
856 regen_advance = idev->cnf.regen_max_retry *
857 idev->cnf.dad_transmits *
858 idev->nd_parms->retrans_time / HZ;
859 write_unlock(&idev->lock);
861 /* A temporary address is created only if this calculated Preferred
862 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
863 * an implementation must not create a temporary address with a zero
864 * Preferred Lifetime.
866 if (tmp_prefered_lft <= regen_advance) {
873 addr_flags = IFA_F_TEMPORARY;
874 /* set in addrconf_prefix_rcv() */
875 if (ifp->flags & IFA_F_OPTIMISTIC)
876 addr_flags |= IFA_F_OPTIMISTIC;
878 ift = !max_addresses ||
879 ipv6_count_addresses(idev) < max_addresses ?
880 ipv6_add_addr(idev, &addr, tmp_plen,
881 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
883 if (!ift || IS_ERR(ift)) {
887 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
889 write_lock(&idev->lock);
893 spin_lock_bh(&ift->lock);
895 ift->valid_lft = tmp_valid_lft;
896 ift->prefered_lft = tmp_prefered_lft;
897 ift->cstamp = tmp_cstamp;
898 ift->tstamp = tmp_tstamp;
899 spin_unlock_bh(&ift->lock);
901 addrconf_dad_start(ift, 0);
910 * Choose an appropriate source address (RFC3484)
913 IPV6_SADDR_RULE_INIT = 0,
914 IPV6_SADDR_RULE_LOCAL,
915 IPV6_SADDR_RULE_SCOPE,
916 IPV6_SADDR_RULE_PREFERRED,
917 #ifdef CONFIG_IPV6_MIP6
921 IPV6_SADDR_RULE_LABEL,
922 #ifdef CONFIG_IPV6_PRIVACY
923 IPV6_SADDR_RULE_PRIVACY,
925 IPV6_SADDR_RULE_ORCHID,
926 IPV6_SADDR_RULE_PREFIX,
930 struct ipv6_saddr_score {
933 struct inet6_ifaddr *ifa;
934 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
939 struct ipv6_saddr_dst {
940 const struct in6_addr *addr;
947 static inline int ipv6_saddr_preferred(int type)
949 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
950 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
955 static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
956 struct ipv6_saddr_dst *dst,
961 if (i <= score->rule) {
963 case IPV6_SADDR_RULE_SCOPE:
964 ret = score->scopedist;
966 case IPV6_SADDR_RULE_PREFIX:
967 ret = score->matchlen;
970 ret = !!test_bit(i, score->scorebits);
976 case IPV6_SADDR_RULE_INIT:
977 /* Rule 0: remember if hiscore is not ready yet */
980 case IPV6_SADDR_RULE_LOCAL:
981 /* Rule 1: Prefer same address */
982 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
984 case IPV6_SADDR_RULE_SCOPE:
985 /* Rule 2: Prefer appropriate scope
990 * ---+--+-+---> scope
992 * | d is scope of the destination.
994 * | \ <- smaller scope is better if
995 * B-15 | \ if scope is enough for destinaion.
996 * | ret = B - scope (-1 <= scope >= d <= 15).
998 * |/ <- greater is better
999 * -C / if scope is not enough for destination.
1000 * /| ret = scope - C (-1 <= d < scope <= 15).
1002 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1003 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1004 * Assume B = 0 and we get C > 29.
1006 ret = __ipv6_addr_src_scope(score->addr_type);
1007 if (ret >= dst->scope)
1010 ret -= 128; /* 30 is enough */
1011 score->scopedist = ret;
1013 case IPV6_SADDR_RULE_PREFERRED:
1014 /* Rule 3: Avoid deprecated and optimistic addresses */
1015 ret = ipv6_saddr_preferred(score->addr_type) ||
1016 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1018 #ifdef CONFIG_IPV6_MIP6
1019 case IPV6_SADDR_RULE_HOA:
1021 /* Rule 4: Prefer home address */
1022 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1023 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1027 case IPV6_SADDR_RULE_OIF:
1028 /* Rule 5: Prefer outgoing interface */
1029 ret = (!dst->ifindex ||
1030 dst->ifindex == score->ifa->idev->dev->ifindex);
1032 case IPV6_SADDR_RULE_LABEL:
1033 /* Rule 6: Prefer matching label */
1034 ret = ipv6_addr_label(&score->ifa->addr, score->addr_type,
1035 score->ifa->idev->dev->ifindex) == dst->label;
1037 #ifdef CONFIG_IPV6_PRIVACY
1038 case IPV6_SADDR_RULE_PRIVACY:
1040 /* Rule 7: Prefer public address
1041 * Note: prefer temprary address if use_tempaddr >= 2
1043 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1044 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1045 score->ifa->idev->cnf.use_tempaddr >= 2;
1046 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1050 case IPV6_SADDR_RULE_ORCHID:
1051 /* Rule 8-: Prefer ORCHID vs ORCHID or
1052 * non-ORCHID vs non-ORCHID
1054 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1055 ipv6_addr_orchid(dst->addr));
1057 case IPV6_SADDR_RULE_PREFIX:
1058 /* Rule 8: Use longest matching prefix */
1059 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1067 __set_bit(i, score->scorebits);
1073 int ipv6_dev_get_saddr(struct net_device *dst_dev,
1074 const struct in6_addr *daddr, unsigned int prefs,
1075 struct in6_addr *saddr)
1077 struct ipv6_saddr_score scores[2],
1078 *score = &scores[0], *hiscore = &scores[1];
1079 struct net *net = dev_net(dst_dev);
1080 struct ipv6_saddr_dst dst;
1081 struct net_device *dev;
1084 dst_type = __ipv6_addr_type(daddr);
1086 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1087 dst.scope = __ipv6_addr_src_scope(dst_type);
1088 dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex);
1092 hiscore->ifa = NULL;
1094 read_lock(&dev_base_lock);
1097 for_each_netdev(net, dev) {
1098 struct inet6_dev *idev;
1100 /* Candidate Source Address (section 4)
1101 * - multicast and link-local destination address,
1102 * the set of candidate source address MUST only
1103 * include addresses assigned to interfaces
1104 * belonging to the same link as the outgoing
1106 * (- For site-local destination addresses, the
1107 * set of candidate source addresses MUST only
1108 * include addresses assigned to interfaces
1109 * belonging to the same site as the outgoing
1112 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1113 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1114 dst.ifindex && dev->ifindex != dst.ifindex)
1117 idev = __in6_dev_get(dev);
1121 read_lock_bh(&idev->lock);
1122 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1126 * - Tentative Address (RFC2462 section 5.4)
1127 * - A tentative address is not considered
1128 * "assigned to an interface" in the traditional
1129 * sense, unless it is also flagged as optimistic.
1130 * - Candidate Source Address (section 4)
1131 * - In any case, anycast addresses, multicast
1132 * addresses, and the unspecified address MUST
1133 * NOT be included in a candidate set.
1135 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1136 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1139 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1141 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1142 score->addr_type & IPV6_ADDR_MULTICAST)) {
1143 LIMIT_NETDEBUG(KERN_DEBUG
1144 "ADDRCONF: unspecified / multicast address "
1145 "assigned as unicast address on %s",
1151 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1153 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1154 int minihiscore, miniscore;
1156 minihiscore = ipv6_get_saddr_eval(hiscore, &dst, i);
1157 miniscore = ipv6_get_saddr_eval(score, &dst, i);
1159 if (minihiscore > miniscore) {
1160 if (i == IPV6_SADDR_RULE_SCOPE &&
1161 score->scopedist > 0) {
1164 * each remaining entry
1165 * has too small (not enough)
1166 * scope, because ifa entries
1167 * are sorted by their scope
1173 } else if (minihiscore < miniscore) {
1174 struct ipv6_saddr_score *tmp;
1177 in6_ifa_put(hiscore->ifa);
1179 in6_ifa_hold(score->ifa);
1185 /* restore our iterator */
1186 score->ifa = hiscore->ifa;
1193 read_unlock_bh(&idev->lock);
1196 read_unlock(&dev_base_lock);
1199 return -EADDRNOTAVAIL;
1201 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1202 in6_ifa_put(hiscore->ifa);
1206 EXPORT_SYMBOL(ipv6_dev_get_saddr);
1208 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1209 unsigned char banned_flags)
1211 struct inet6_dev *idev;
1212 int err = -EADDRNOTAVAIL;
1215 if ((idev = __in6_dev_get(dev)) != NULL) {
1216 struct inet6_ifaddr *ifp;
1218 read_lock_bh(&idev->lock);
1219 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1220 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1221 ipv6_addr_copy(addr, &ifp->addr);
1226 read_unlock_bh(&idev->lock);
1232 static int ipv6_count_addresses(struct inet6_dev *idev)
1235 struct inet6_ifaddr *ifp;
1237 read_lock_bh(&idev->lock);
1238 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1240 read_unlock_bh(&idev->lock);
1244 int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1245 struct net_device *dev, int strict)
1247 struct inet6_ifaddr * ifp;
1248 u8 hash = ipv6_addr_hash(addr);
1250 read_lock_bh(&addrconf_hash_lock);
1251 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1252 if (!net_eq(dev_net(ifp->idev->dev), net))
1254 if (ipv6_addr_equal(&ifp->addr, addr) &&
1255 !(ifp->flags&IFA_F_TENTATIVE)) {
1256 if (dev == NULL || ifp->idev->dev == dev ||
1257 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1261 read_unlock_bh(&addrconf_hash_lock);
1264 EXPORT_SYMBOL(ipv6_chk_addr);
1267 int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1268 struct net_device *dev)
1270 struct inet6_ifaddr * ifp;
1271 u8 hash = ipv6_addr_hash(addr);
1273 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1274 if (!net_eq(dev_net(ifp->idev->dev), net))
1276 if (ipv6_addr_equal(&ifp->addr, addr)) {
1277 if (dev == NULL || ifp->idev->dev == dev)
1284 int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1286 struct inet6_dev *idev;
1287 struct inet6_ifaddr *ifa;
1292 idev = __in6_dev_get(dev);
1294 read_lock_bh(&idev->lock);
1295 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1296 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1301 read_unlock_bh(&idev->lock);
1307 EXPORT_SYMBOL(ipv6_chk_prefix);
1309 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1310 struct net_device *dev, int strict)
1312 struct inet6_ifaddr * ifp;
1313 u8 hash = ipv6_addr_hash(addr);
1315 read_lock_bh(&addrconf_hash_lock);
1316 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1317 if (!net_eq(dev_net(ifp->idev->dev), net))
1319 if (ipv6_addr_equal(&ifp->addr, addr)) {
1320 if (dev == NULL || ifp->idev->dev == dev ||
1321 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1327 read_unlock_bh(&addrconf_hash_lock);
1332 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1334 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1335 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1336 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1337 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1338 int sk_ipv6only = ipv6_only_sock(sk);
1339 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1340 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1341 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1343 if (!sk2_rcv_saddr && !sk_ipv6only)
1346 if (addr_type2 == IPV6_ADDR_ANY &&
1347 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1350 if (addr_type == IPV6_ADDR_ANY &&
1351 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1354 if (sk2_rcv_saddr6 &&
1355 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1358 if (addr_type == IPV6_ADDR_MAPPED &&
1360 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1366 /* Gets referenced address, destroys ifaddr */
1368 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1370 if (ifp->flags&IFA_F_PERMANENT) {
1371 spin_lock_bh(&ifp->lock);
1372 addrconf_del_timer(ifp);
1373 ifp->flags |= IFA_F_TENTATIVE;
1374 spin_unlock_bh(&ifp->lock);
1376 #ifdef CONFIG_IPV6_PRIVACY
1377 } else if (ifp->flags&IFA_F_TEMPORARY) {
1378 struct inet6_ifaddr *ifpub;
1379 spin_lock_bh(&ifp->lock);
1382 in6_ifa_hold(ifpub);
1383 spin_unlock_bh(&ifp->lock);
1384 ipv6_create_tempaddr(ifpub, ifp);
1387 spin_unlock_bh(&ifp->lock);
1395 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1397 if (net_ratelimit())
1398 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1399 addrconf_dad_stop(ifp);
1402 /* Join to solicited addr multicast group. */
1404 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1406 struct in6_addr maddr;
1408 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1411 addrconf_addr_solict_mult(addr, &maddr);
1412 ipv6_dev_mc_inc(dev, &maddr);
1415 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1417 struct in6_addr maddr;
1419 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1422 addrconf_addr_solict_mult(addr, &maddr);
1423 __ipv6_dev_mc_dec(idev, &maddr);
1426 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1428 struct in6_addr addr;
1429 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1430 if (ipv6_addr_any(&addr))
1432 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1435 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1437 struct in6_addr addr;
1438 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1439 if (ipv6_addr_any(&addr))
1441 __ipv6_dev_ac_dec(ifp->idev, &addr);
1444 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1446 if (dev->addr_len != ETH_ALEN)
1448 memcpy(eui, dev->dev_addr, 3);
1449 memcpy(eui + 5, dev->dev_addr + 3, 3);
1452 * The zSeries OSA network cards can be shared among various
1453 * OS instances, but the OSA cards have only one MAC address.
1454 * This leads to duplicate address conflicts in conjunction
1455 * with IPv6 if more than one instance uses the same card.
1457 * The driver for these cards can deliver a unique 16-bit
1458 * identifier for each instance sharing the same card. It is
1459 * placed instead of 0xFFFE in the interface identifier. The
1460 * "u" bit of the interface identifier is not inverted in this
1461 * case. Hence the resulting interface identifier has local
1462 * scope according to RFC2373.
1465 eui[3] = (dev->dev_id >> 8) & 0xFF;
1466 eui[4] = dev->dev_id & 0xFF;
1475 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1477 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1478 if (dev->addr_len != ARCNET_ALEN)
1481 eui[7] = *(u8*)dev->dev_addr;
1485 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1487 if (dev->addr_len != INFINIBAND_ALEN)
1489 memcpy(eui, dev->dev_addr + 12, 8);
1494 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1496 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1497 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1498 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1499 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1500 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1501 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1505 memcpy(eui + 4, &addr, 4);
1508 EXPORT_SYMBOL(__ipv6_isatap_ifid);
1510 static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1512 if (dev->priv_flags & IFF_ISATAP)
1513 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1517 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1519 switch (dev->type) {
1522 case ARPHRD_IEEE802_TR:
1523 return addrconf_ifid_eui48(eui, dev);
1525 return addrconf_ifid_arcnet(eui, dev);
1526 case ARPHRD_INFINIBAND:
1527 return addrconf_ifid_infiniband(eui, dev);
1529 return addrconf_ifid_sit(eui, dev);
1534 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1537 struct inet6_ifaddr *ifp;
1539 read_lock_bh(&idev->lock);
1540 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1541 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1542 memcpy(eui, ifp->addr.s6_addr+8, 8);
1547 read_unlock_bh(&idev->lock);
1551 #ifdef CONFIG_IPV6_PRIVACY
1552 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1553 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1556 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1557 idev->rndid[0] &= ~0x02;
1560 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1561 * check if generated address is not inappropriate
1563 * - Reserved subnet anycast (RFC 2526)
1564 * 11111101 11....11 1xxxxxxx
1565 * - ISATAP (RFC4214) 6.1
1566 * 00-00-5E-FE-xx-xx-xx-xx
1568 * - XXX: already assigned to an address on the device
1570 if (idev->rndid[0] == 0xfd &&
1571 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1572 (idev->rndid[7]&0x80))
1574 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1575 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1577 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1584 static void ipv6_regen_rndid(unsigned long data)
1586 struct inet6_dev *idev = (struct inet6_dev *) data;
1587 unsigned long expires;
1590 write_lock_bh(&idev->lock);
1595 if (__ipv6_regen_rndid(idev) < 0)
1599 idev->cnf.temp_prefered_lft * HZ -
1600 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1601 if (time_before(expires, jiffies)) {
1603 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1608 if (!mod_timer(&idev->regen_timer, expires))
1612 write_unlock_bh(&idev->lock);
1613 rcu_read_unlock_bh();
1617 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1620 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1621 ret = __ipv6_regen_rndid(idev);
1631 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1632 unsigned long expires, u32 flags)
1634 struct fib6_config cfg = {
1635 .fc_table = RT6_TABLE_PREFIX,
1636 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1637 .fc_ifindex = dev->ifindex,
1638 .fc_expires = expires,
1640 .fc_flags = RTF_UP | flags,
1641 .fc_nlinfo.nl_net = dev_net(dev),
1644 ipv6_addr_copy(&cfg.fc_dst, pfx);
1646 /* Prevent useless cloning on PtP SIT.
1647 This thing is done here expecting that the whole
1648 class of non-broadcast devices need not cloning.
1650 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1651 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1652 cfg.fc_flags |= RTF_NONEXTHOP;
1655 ip6_route_add(&cfg);
1658 /* Create "default" multicast route to the interface */
1660 static void addrconf_add_mroute(struct net_device *dev)
1662 struct fib6_config cfg = {
1663 .fc_table = RT6_TABLE_LOCAL,
1664 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1665 .fc_ifindex = dev->ifindex,
1668 .fc_nlinfo.nl_net = dev_net(dev),
1671 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1673 ip6_route_add(&cfg);
1676 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1677 static void sit_route_add(struct net_device *dev)
1679 struct fib6_config cfg = {
1680 .fc_table = RT6_TABLE_MAIN,
1681 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1682 .fc_ifindex = dev->ifindex,
1684 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1685 .fc_nlinfo.nl_net = dev_net(dev),
1688 /* prefix length - 96 bits "::d.d.d.d" */
1689 ip6_route_add(&cfg);
1693 static void addrconf_add_lroute(struct net_device *dev)
1695 struct in6_addr addr;
1697 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1698 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1701 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1703 struct inet6_dev *idev;
1707 if ((idev = ipv6_find_idev(dev)) == NULL)
1710 /* Add default multicast route */
1711 addrconf_add_mroute(dev);
1713 /* Add link local route */
1714 addrconf_add_lroute(dev);
1718 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1720 struct prefix_info *pinfo;
1724 unsigned long rt_expires;
1725 struct inet6_dev *in6_dev;
1727 pinfo = (struct prefix_info *) opt;
1729 if (len < sizeof(struct prefix_info)) {
1730 ADBG(("addrconf: prefix option too short\n"));
1735 * Validation checks ([ADDRCONF], page 19)
1738 addr_type = ipv6_addr_type(&pinfo->prefix);
1740 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1743 valid_lft = ntohl(pinfo->valid);
1744 prefered_lft = ntohl(pinfo->prefered);
1746 if (prefered_lft > valid_lft) {
1747 if (net_ratelimit())
1748 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1752 in6_dev = in6_dev_get(dev);
1754 if (in6_dev == NULL) {
1755 if (net_ratelimit())
1756 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1761 * Two things going on here:
1762 * 1) Add routes for on-link prefixes
1763 * 2) Configure prefixes with the auto flag set
1766 /* Avoid arithmetic overflow. Really, we could
1767 save rt_expires in seconds, likely valid_lft,
1768 but it would require division in fib gc, that it
1771 if (valid_lft >= 0x7FFFFFFF/HZ)
1772 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1774 rt_expires = valid_lft * HZ;
1777 * We convert this (in jiffies) to clock_t later.
1778 * Avoid arithmetic overflow there as well.
1779 * Overflow can happen only if HZ < USER_HZ.
1781 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1782 rt_expires = 0x7FFFFFFF / USER_HZ;
1784 if (pinfo->onlink) {
1785 struct rt6_info *rt;
1786 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
1789 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1790 if (rt->rt6i_flags&RTF_EXPIRES) {
1791 if (valid_lft == 0) {
1795 rt->rt6i_expires = jiffies + rt_expires;
1798 } else if (valid_lft) {
1799 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1800 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1803 dst_release(&rt->u.dst);
1806 /* Try to figure out our local address for this prefix */
1808 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1809 struct inet6_ifaddr * ifp;
1810 struct in6_addr addr;
1811 int create = 0, update_lft = 0;
1813 if (pinfo->prefix_len == 64) {
1814 memcpy(&addr, &pinfo->prefix, 8);
1815 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1816 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1817 in6_dev_put(in6_dev);
1822 if (net_ratelimit())
1823 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1825 in6_dev_put(in6_dev);
1830 ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1);
1832 if (ifp == NULL && valid_lft) {
1833 int max_addresses = in6_dev->cnf.max_addresses;
1836 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1837 if (in6_dev->cnf.optimistic_dad &&
1838 !ipv6_devconf.forwarding)
1839 addr_flags = IFA_F_OPTIMISTIC;
1842 /* Do not allow to create too much of autoconfigured
1843 * addresses; this would be too easy way to crash kernel.
1845 if (!max_addresses ||
1846 ipv6_count_addresses(in6_dev) < max_addresses)
1847 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1848 addr_type&IPV6_ADDR_SCOPE_MASK,
1851 if (!ifp || IS_ERR(ifp)) {
1852 in6_dev_put(in6_dev);
1856 update_lft = create = 1;
1857 ifp->cstamp = jiffies;
1858 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1864 #ifdef CONFIG_IPV6_PRIVACY
1865 struct inet6_ifaddr *ift;
1869 /* update lifetime (RFC2462 5.5.3 e) */
1870 spin_lock(&ifp->lock);
1872 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1873 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1876 if (!update_lft && stored_lft) {
1877 if (valid_lft > MIN_VALID_LIFETIME ||
1878 valid_lft > stored_lft)
1880 else if (stored_lft <= MIN_VALID_LIFETIME) {
1881 /* valid_lft <= stored_lft is always true */
1885 valid_lft = MIN_VALID_LIFETIME;
1886 if (valid_lft < prefered_lft)
1887 prefered_lft = valid_lft;
1893 ifp->valid_lft = valid_lft;
1894 ifp->prefered_lft = prefered_lft;
1897 ifp->flags &= ~IFA_F_DEPRECATED;
1898 spin_unlock(&ifp->lock);
1900 if (!(flags&IFA_F_TENTATIVE))
1901 ipv6_ifa_notify(0, ifp);
1903 spin_unlock(&ifp->lock);
1905 #ifdef CONFIG_IPV6_PRIVACY
1906 read_lock_bh(&in6_dev->lock);
1907 /* update all temporary addresses in the list */
1908 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1910 * When adjusting the lifetimes of an existing
1911 * temporary address, only lower the lifetimes.
1912 * Implementations must not increase the
1913 * lifetimes of an existing temporary address
1914 * when processing a Prefix Information Option.
1916 if (ifp != ift->ifpub)
1919 spin_lock(&ift->lock);
1921 if (ift->valid_lft > valid_lft &&
1922 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1923 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1924 if (ift->prefered_lft > prefered_lft &&
1925 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1926 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1927 spin_unlock(&ift->lock);
1928 if (!(flags&IFA_F_TENTATIVE))
1929 ipv6_ifa_notify(0, ift);
1932 if (create && in6_dev->cnf.use_tempaddr > 0) {
1934 * When a new public address is created as described in [ADDRCONF],
1935 * also create a new temporary address.
1937 read_unlock_bh(&in6_dev->lock);
1938 ipv6_create_tempaddr(ifp, NULL);
1940 read_unlock_bh(&in6_dev->lock);
1947 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1948 in6_dev_put(in6_dev);
1952 * Set destination address.
1953 * Special case for SIT interfaces where we create a new "virtual"
1956 int addrconf_set_dstaddr(struct net *net, void __user *arg)
1958 struct in6_ifreq ireq;
1959 struct net_device *dev;
1965 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1968 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1974 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1975 if (dev->type == ARPHRD_SIT) {
1978 struct ip_tunnel_parm p;
1980 err = -EADDRNOTAVAIL;
1981 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1984 memset(&p, 0, sizeof(p));
1985 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1989 p.iph.protocol = IPPROTO_IPV6;
1991 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1993 oldfs = get_fs(); set_fs(KERNEL_DS);
1994 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1999 dev = __dev_get_by_name(net, p.name);
2002 err = dev_open(dev);
2013 * Manual configuration of address on an interface
2015 static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
2016 int plen, __u8 ifa_flags, __u32 prefered_lft,
2019 struct inet6_ifaddr *ifp;
2020 struct inet6_dev *idev;
2021 struct net_device *dev;
2023 u32 flags = RTF_EXPIRES;
2027 /* check the lifetime */
2028 if (!valid_lft || prefered_lft > valid_lft)
2031 dev = __dev_get_by_index(net, ifindex);
2035 if ((idev = addrconf_add_dev(dev)) == NULL)
2038 scope = ipv6_addr_scope(pfx);
2040 if (valid_lft == INFINITY_LIFE_TIME) {
2041 ifa_flags |= IFA_F_PERMANENT;
2043 } else if (valid_lft >= 0x7FFFFFFF/HZ)
2044 valid_lft = 0x7FFFFFFF/HZ;
2046 if (prefered_lft == 0)
2047 ifa_flags |= IFA_F_DEPRECATED;
2048 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
2049 (prefered_lft != INFINITY_LIFE_TIME))
2050 prefered_lft = 0x7FFFFFFF/HZ;
2052 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2055 spin_lock_bh(&ifp->lock);
2056 ifp->valid_lft = valid_lft;
2057 ifp->prefered_lft = prefered_lft;
2058 ifp->tstamp = jiffies;
2059 spin_unlock_bh(&ifp->lock);
2061 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2062 jiffies_to_clock_t(valid_lft * HZ), flags);
2064 * Note that section 3.1 of RFC 4429 indicates
2065 * that the Optimistic flag should not be set for
2066 * manually configured addresses
2068 addrconf_dad_start(ifp, 0);
2074 return PTR_ERR(ifp);
2077 static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
2080 struct inet6_ifaddr *ifp;
2081 struct inet6_dev *idev;
2082 struct net_device *dev;
2084 dev = __dev_get_by_index(net, ifindex);
2088 if ((idev = __in6_dev_get(dev)) == NULL)
2091 read_lock_bh(&idev->lock);
2092 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2093 if (ifp->prefix_len == plen &&
2094 ipv6_addr_equal(pfx, &ifp->addr)) {
2096 read_unlock_bh(&idev->lock);
2100 /* If the last address is deleted administratively,
2101 disable IPv6 on this interface.
2103 if (idev->addr_list == NULL)
2104 addrconf_ifdown(idev->dev, 1);
2108 read_unlock_bh(&idev->lock);
2109 return -EADDRNOTAVAIL;
2113 int addrconf_add_ifaddr(struct net *net, void __user *arg)
2115 struct in6_ifreq ireq;
2118 if (!capable(CAP_NET_ADMIN))
2121 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2125 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2126 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2127 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2132 int addrconf_del_ifaddr(struct net *net, void __user *arg)
2134 struct in6_ifreq ireq;
2137 if (!capable(CAP_NET_ADMIN))
2140 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2144 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2145 ireq.ifr6_prefixlen);
2150 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2151 static void sit_add_v4_addrs(struct inet6_dev *idev)
2153 struct inet6_ifaddr * ifp;
2154 struct in6_addr addr;
2155 struct net_device *dev;
2156 struct net *net = dev_net(idev->dev);
2161 memset(&addr, 0, sizeof(struct in6_addr));
2162 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2164 if (idev->dev->flags&IFF_POINTOPOINT) {
2165 addr.s6_addr32[0] = htonl(0xfe800000);
2168 scope = IPV6_ADDR_COMPATv4;
2171 if (addr.s6_addr32[3]) {
2172 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2174 spin_lock_bh(&ifp->lock);
2175 ifp->flags &= ~IFA_F_TENTATIVE;
2176 spin_unlock_bh(&ifp->lock);
2177 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2183 for_each_netdev(net, dev) {
2184 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2185 if (in_dev && (dev->flags & IFF_UP)) {
2186 struct in_ifaddr * ifa;
2190 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2193 addr.s6_addr32[3] = ifa->ifa_local;
2195 if (ifa->ifa_scope == RT_SCOPE_LINK)
2197 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2198 if (idev->dev->flags&IFF_POINTOPOINT)
2202 if (idev->dev->flags&IFF_POINTOPOINT)
2207 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2210 spin_lock_bh(&ifp->lock);
2211 ifp->flags &= ~IFA_F_TENTATIVE;
2212 spin_unlock_bh(&ifp->lock);
2213 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2222 static void init_loopback(struct net_device *dev)
2224 struct inet6_dev *idev;
2225 struct inet6_ifaddr * ifp;
2231 if ((idev = ipv6_find_idev(dev)) == NULL) {
2232 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2236 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2238 spin_lock_bh(&ifp->lock);
2239 ifp->flags &= ~IFA_F_TENTATIVE;
2240 spin_unlock_bh(&ifp->lock);
2241 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2246 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2248 struct inet6_ifaddr * ifp;
2249 u32 addr_flags = IFA_F_PERMANENT;
2251 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2252 if (idev->cnf.optimistic_dad &&
2253 !ipv6_devconf.forwarding)
2254 addr_flags |= IFA_F_OPTIMISTIC;
2258 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2260 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2261 addrconf_dad_start(ifp, 0);
2266 static void addrconf_dev_config(struct net_device *dev)
2268 struct in6_addr addr;
2269 struct inet6_dev * idev;
2273 if ((dev->type != ARPHRD_ETHER) &&
2274 (dev->type != ARPHRD_FDDI) &&
2275 (dev->type != ARPHRD_IEEE802_TR) &&
2276 (dev->type != ARPHRD_ARCNET) &&
2277 (dev->type != ARPHRD_INFINIBAND)) {
2278 /* Alas, we support only Ethernet autoconfiguration. */
2282 idev = addrconf_add_dev(dev);
2286 memset(&addr, 0, sizeof(struct in6_addr));
2287 addr.s6_addr32[0] = htonl(0xFE800000);
2289 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2290 addrconf_add_linklocal(idev, &addr);
2293 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2294 static void addrconf_sit_config(struct net_device *dev)
2296 struct inet6_dev *idev;
2301 * Configure the tunnel with one of our IPv4
2302 * addresses... we should configure all of
2303 * our v4 addrs in the tunnel
2306 if ((idev = ipv6_find_idev(dev)) == NULL) {
2307 printk(KERN_DEBUG "init sit: add_dev failed\n");
2311 if (dev->priv_flags & IFF_ISATAP) {
2312 struct in6_addr addr;
2314 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2315 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2316 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2317 addrconf_add_linklocal(idev, &addr);
2321 sit_add_v4_addrs(idev);
2323 if (dev->flags&IFF_POINTOPOINT) {
2324 addrconf_add_mroute(dev);
2325 addrconf_add_lroute(dev);
2332 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2334 struct in6_addr lladdr;
2336 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2337 addrconf_add_linklocal(idev, &lladdr);
2343 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2345 struct net_device *link_dev;
2346 struct net *net = dev_net(idev->dev);
2348 /* first try to inherit the link-local address from the link device */
2349 if (idev->dev->iflink &&
2350 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
2351 if (!ipv6_inherit_linklocal(idev, link_dev))
2354 /* then try to inherit it from any device */
2355 for_each_netdev(net, link_dev) {
2356 if (!ipv6_inherit_linklocal(idev, link_dev))
2359 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2363 * Autoconfigure tunnel with a link-local address so routing protocols,
2364 * DHCPv6, MLD etc. can be run over the virtual link
2367 static void addrconf_ip6_tnl_config(struct net_device *dev)
2369 struct inet6_dev *idev;
2373 if ((idev = addrconf_add_dev(dev)) == NULL) {
2374 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2377 ip6_tnl_add_linklocal(idev);
2380 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2383 struct net_device *dev = (struct net_device *) data;
2384 struct inet6_dev *idev = __in6_dev_get(dev);
2385 int run_pending = 0;
2389 case NETDEV_REGISTER:
2390 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2391 idev = ipv6_add_dev(dev);
2393 return notifier_from_errno(-ENOMEM);
2398 if (dev->flags & IFF_SLAVE)
2401 if (event == NETDEV_UP) {
2402 if (!addrconf_qdisc_ok(dev)) {
2403 /* device is not ready yet. */
2405 "ADDRCONF(NETDEV_UP): %s: "
2406 "link is not ready\n",
2411 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2412 idev = ipv6_add_dev(dev);
2415 idev->if_flags |= IF_READY;
2417 if (!addrconf_qdisc_ok(dev)) {
2418 /* device is still not ready. */
2423 if (idev->if_flags & IF_READY) {
2424 /* device is already configured. */
2427 idev->if_flags |= IF_READY;
2431 "ADDRCONF(NETDEV_CHANGE): %s: "
2432 "link becomes ready\n",
2439 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2441 addrconf_sit_config(dev);
2444 case ARPHRD_TUNNEL6:
2445 addrconf_ip6_tnl_config(dev);
2447 case ARPHRD_LOOPBACK:
2452 addrconf_dev_config(dev);
2457 addrconf_dad_run(idev);
2459 /* If the MTU changed during the interface down, when the
2460 interface up, the changed MTU must be reflected in the
2461 idev as well as routers.
2463 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2464 rt6_mtu_change(dev, dev->mtu);
2465 idev->cnf.mtu6 = dev->mtu;
2467 idev->tstamp = jiffies;
2468 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2469 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2470 stop IPv6 on this interface.
2472 if (dev->mtu < IPV6_MIN_MTU)
2473 addrconf_ifdown(dev, event != NETDEV_DOWN);
2477 case NETDEV_CHANGEMTU:
2478 if (idev && dev->mtu >= IPV6_MIN_MTU) {
2479 rt6_mtu_change(dev, dev->mtu);
2480 idev->cnf.mtu6 = dev->mtu;
2484 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2485 idev = ipv6_add_dev(dev);
2490 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2493 case NETDEV_UNREGISTER:
2495 * Remove all addresses from this interface.
2497 addrconf_ifdown(dev, event != NETDEV_DOWN);
2500 case NETDEV_CHANGENAME:
2502 snmp6_unregister_dev(idev);
2503 addrconf_sysctl_unregister(idev);
2504 addrconf_sysctl_register(idev);
2505 err = snmp6_register_dev(idev);
2507 return notifier_from_errno(err);
2516 * addrconf module should be notified of a device going up
2518 static struct notifier_block ipv6_dev_notf = {
2519 .notifier_call = addrconf_notify,
2523 static int addrconf_ifdown(struct net_device *dev, int how)
2525 struct inet6_dev *idev;
2526 struct inet6_ifaddr *ifa, **bifa;
2527 struct net *net = dev_net(dev);
2532 if (dev == init_net.loopback_dev && how == 1)
2535 rt6_ifdown(net, dev);
2536 neigh_ifdown(&nd_tbl, dev);
2538 idev = __in6_dev_get(dev);
2542 /* Step 1: remove reference to ipv6 device from parent device.
2548 /* protected by rtnl_lock */
2549 rcu_assign_pointer(dev->ip6_ptr, NULL);
2551 /* Step 1.5: remove snmp6 entry */
2552 snmp6_unregister_dev(idev);
2556 /* Step 2: clear hash table */
2557 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2558 bifa = &inet6_addr_lst[i];
2560 write_lock_bh(&addrconf_hash_lock);
2561 while ((ifa = *bifa) != NULL) {
2562 if (ifa->idev == idev) {
2563 *bifa = ifa->lst_next;
2564 ifa->lst_next = NULL;
2565 addrconf_del_timer(ifa);
2569 bifa = &ifa->lst_next;
2571 write_unlock_bh(&addrconf_hash_lock);
2574 write_lock_bh(&idev->lock);
2576 /* Step 3: clear flags for stateless addrconf */
2578 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2580 /* Step 4: clear address list */
2581 #ifdef CONFIG_IPV6_PRIVACY
2582 if (how == 1 && del_timer(&idev->regen_timer))
2585 /* clear tempaddr list */
2586 while ((ifa = idev->tempaddr_list) != NULL) {
2587 idev->tempaddr_list = ifa->tmp_next;
2588 ifa->tmp_next = NULL;
2590 write_unlock_bh(&idev->lock);
2591 spin_lock_bh(&ifa->lock);
2594 in6_ifa_put(ifa->ifpub);
2597 spin_unlock_bh(&ifa->lock);
2599 write_lock_bh(&idev->lock);
2602 while ((ifa = idev->addr_list) != NULL) {
2603 idev->addr_list = ifa->if_next;
2604 ifa->if_next = NULL;
2606 addrconf_del_timer(ifa);
2607 write_unlock_bh(&idev->lock);
2609 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2610 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2613 write_lock_bh(&idev->lock);
2615 write_unlock_bh(&idev->lock);
2617 /* Step 5: Discard multicast list */
2620 ipv6_mc_destroy_dev(idev);
2624 idev->tstamp = jiffies;
2626 /* Shot the device (if unregistered) */
2629 addrconf_sysctl_unregister(idev);
2630 neigh_parms_release(&nd_tbl, idev->nd_parms);
2631 neigh_ifdown(&nd_tbl, dev);
2637 static void addrconf_rs_timer(unsigned long data)
2639 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2641 if (ifp->idev->cnf.forwarding)
2644 if (ifp->idev->if_flags & IF_RA_RCVD) {
2646 * Announcement received after solicitation
2652 spin_lock(&ifp->lock);
2653 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2654 /* The wait after the last probe can be shorter */
2655 addrconf_mod_timer(ifp, AC_RS,
2656 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2657 ifp->idev->cnf.rtr_solicit_delay :
2658 ifp->idev->cnf.rtr_solicit_interval);
2659 spin_unlock(&ifp->lock);
2661 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2663 spin_unlock(&ifp->lock);
2665 * Note: we do not support deprecated "all on-link"
2666 * assumption any longer.
2668 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2669 ifp->idev->dev->name);
2677 * Duplicate Address Detection
2679 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2681 unsigned long rand_num;
2682 struct inet6_dev *idev = ifp->idev;
2684 if (ifp->flags & IFA_F_OPTIMISTIC)
2687 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2689 ifp->probes = idev->cnf.dad_transmits;
2690 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2693 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2695 struct inet6_dev *idev = ifp->idev;
2696 struct net_device *dev = idev->dev;
2698 addrconf_join_solict(dev, &ifp->addr);
2700 net_srandom(ifp->addr.s6_addr32[3]);
2702 read_lock_bh(&idev->lock);
2705 spin_lock_bh(&ifp->lock);
2707 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2708 !(ifp->flags&IFA_F_TENTATIVE) ||
2709 ifp->flags & IFA_F_NODAD) {
2710 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2711 spin_unlock_bh(&ifp->lock);
2712 read_unlock_bh(&idev->lock);
2714 addrconf_dad_completed(ifp);
2718 if (!(idev->if_flags & IF_READY)) {
2719 spin_unlock_bh(&ifp->lock);
2720 read_unlock_bh(&idev->lock);
2722 * If the defice is not ready:
2723 * - keep it tentative if it is a permanent address.
2724 * - otherwise, kill it.
2727 addrconf_dad_stop(ifp);
2732 * Optimistic nodes can start receiving
2735 if(ifp->flags & IFA_F_OPTIMISTIC)
2736 ip6_ins_rt(ifp->rt);
2738 addrconf_dad_kick(ifp);
2739 spin_unlock_bh(&ifp->lock);
2741 read_unlock_bh(&idev->lock);
2744 static void addrconf_dad_timer(unsigned long data)
2746 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2747 struct inet6_dev *idev = ifp->idev;
2748 struct in6_addr mcaddr;
2750 read_lock_bh(&idev->lock);
2752 read_unlock_bh(&idev->lock);
2755 spin_lock_bh(&ifp->lock);
2756 if (ifp->probes == 0) {
2758 * DAD was successful
2761 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2762 spin_unlock_bh(&ifp->lock);
2763 read_unlock_bh(&idev->lock);
2765 addrconf_dad_completed(ifp);
2771 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2772 spin_unlock_bh(&ifp->lock);
2773 read_unlock_bh(&idev->lock);
2775 /* send a neighbour solicitation for our addr */
2776 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2777 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
2782 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2784 struct net_device * dev = ifp->idev->dev;
2787 * Configure the address for reception. Now it is valid.
2790 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2792 /* If added prefix is link local and forwarding is off,
2793 start sending router solicitations.
2796 if (ifp->idev->cnf.forwarding == 0 &&
2797 ifp->idev->cnf.rtr_solicits > 0 &&
2798 (dev->flags&IFF_LOOPBACK) == 0 &&
2799 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2801 * If a host as already performed a random delay
2802 * [...] as part of DAD [...] there is no need
2803 * to delay again before sending the first RS
2805 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2807 spin_lock_bh(&ifp->lock);
2809 ifp->idev->if_flags |= IF_RS_SENT;
2810 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2811 spin_unlock_bh(&ifp->lock);
2815 static void addrconf_dad_run(struct inet6_dev *idev) {
2816 struct inet6_ifaddr *ifp;
2818 read_lock_bh(&idev->lock);
2819 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2820 spin_lock_bh(&ifp->lock);
2821 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2822 spin_unlock_bh(&ifp->lock);
2825 spin_unlock_bh(&ifp->lock);
2826 addrconf_dad_kick(ifp);
2828 read_unlock_bh(&idev->lock);
2831 #ifdef CONFIG_PROC_FS
2832 struct if6_iter_state {
2833 struct seq_net_private p;
2837 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2839 struct inet6_ifaddr *ifa = NULL;
2840 struct if6_iter_state *state = seq->private;
2841 struct net *net = seq_file_net(seq);
2843 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2844 ifa = inet6_addr_lst[state->bucket];
2846 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
2847 ifa = ifa->lst_next;
2854 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2856 struct if6_iter_state *state = seq->private;
2857 struct net *net = seq_file_net(seq);
2859 ifa = ifa->lst_next;
2862 if (!net_eq(dev_net(ifa->idev->dev), net)) {
2863 ifa = ifa->lst_next;
2868 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2869 ifa = inet6_addr_lst[state->bucket];
2876 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2878 struct inet6_ifaddr *ifa = if6_get_first(seq);
2881 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2883 return pos ? NULL : ifa;
2886 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2887 __acquires(addrconf_hash_lock)
2889 read_lock_bh(&addrconf_hash_lock);
2890 return if6_get_idx(seq, *pos);
2893 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2895 struct inet6_ifaddr *ifa;
2897 ifa = if6_get_next(seq, v);
2902 static void if6_seq_stop(struct seq_file *seq, void *v)
2903 __releases(addrconf_hash_lock)
2905 read_unlock_bh(&addrconf_hash_lock);
2908 static int if6_seq_show(struct seq_file *seq, void *v)
2910 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2912 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2914 ifp->idev->dev->ifindex,
2918 ifp->idev->dev->name);
2922 static const struct seq_operations if6_seq_ops = {
2923 .start = if6_seq_start,
2924 .next = if6_seq_next,
2925 .show = if6_seq_show,
2926 .stop = if6_seq_stop,
2929 static int if6_seq_open(struct inode *inode, struct file *file)
2931 return seq_open_net(inode, file, &if6_seq_ops,
2932 sizeof(struct if6_iter_state));
2935 static const struct file_operations if6_fops = {
2936 .owner = THIS_MODULE,
2937 .open = if6_seq_open,
2939 .llseek = seq_lseek,
2940 .release = seq_release_net,
2943 static int if6_proc_net_init(struct net *net)
2945 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
2950 static void if6_proc_net_exit(struct net *net)
2952 proc_net_remove(net, "if_inet6");
2955 static struct pernet_operations if6_proc_net_ops = {
2956 .init = if6_proc_net_init,
2957 .exit = if6_proc_net_exit,
2960 int __init if6_proc_init(void)
2962 return register_pernet_subsys(&if6_proc_net_ops);
2965 void if6_proc_exit(void)
2967 unregister_pernet_subsys(&if6_proc_net_ops);
2969 #endif /* CONFIG_PROC_FS */
2971 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2972 /* Check if address is a home address configured on any interface. */
2973 int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
2976 struct inet6_ifaddr * ifp;
2977 u8 hash = ipv6_addr_hash(addr);
2978 read_lock_bh(&addrconf_hash_lock);
2979 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2980 if (!net_eq(dev_net(ifp->idev->dev), net))
2982 if (ipv6_addr_equal(&ifp->addr, addr) &&
2983 (ifp->flags & IFA_F_HOMEADDRESS)) {
2988 read_unlock_bh(&addrconf_hash_lock);
2994 * Periodic address status verification
2997 static void addrconf_verify(unsigned long foo)
2999 struct inet6_ifaddr *ifp;
3000 unsigned long now, next;
3003 spin_lock_bh(&addrconf_verify_lock);
3005 next = now + ADDR_CHECK_FREQUENCY;
3007 del_timer(&addr_chk_timer);
3009 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3012 read_lock(&addrconf_hash_lock);
3013 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3015 #ifdef CONFIG_IPV6_PRIVACY
3016 unsigned long regen_advance;
3019 if (ifp->flags & IFA_F_PERMANENT)
3022 spin_lock(&ifp->lock);
3023 age = (now - ifp->tstamp) / HZ;
3025 #ifdef CONFIG_IPV6_PRIVACY
3026 regen_advance = ifp->idev->cnf.regen_max_retry *
3027 ifp->idev->cnf.dad_transmits *
3028 ifp->idev->nd_parms->retrans_time / HZ;
3031 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3032 age >= ifp->valid_lft) {
3033 spin_unlock(&ifp->lock);
3035 read_unlock(&addrconf_hash_lock);
3038 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3039 spin_unlock(&ifp->lock);
3041 } else if (age >= ifp->prefered_lft) {
3042 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3045 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3047 ifp->flags |= IFA_F_DEPRECATED;
3050 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3051 next = ifp->tstamp + ifp->valid_lft * HZ;
3053 spin_unlock(&ifp->lock);
3057 read_unlock(&addrconf_hash_lock);
3059 ipv6_ifa_notify(0, ifp);
3063 #ifdef CONFIG_IPV6_PRIVACY
3064 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3065 !(ifp->flags&IFA_F_TENTATIVE)) {
3066 if (age >= ifp->prefered_lft - regen_advance) {
3067 struct inet6_ifaddr *ifpub = ifp->ifpub;
3068 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3069 next = ifp->tstamp + ifp->prefered_lft * HZ;
3070 if (!ifp->regen_count && ifpub) {
3073 in6_ifa_hold(ifpub);
3074 spin_unlock(&ifp->lock);
3075 read_unlock(&addrconf_hash_lock);
3076 spin_lock(&ifpub->lock);
3077 ifpub->regen_count = 0;
3078 spin_unlock(&ifpub->lock);
3079 ipv6_create_tempaddr(ifpub, ifp);
3084 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3085 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3086 spin_unlock(&ifp->lock);
3089 /* ifp->prefered_lft <= ifp->valid_lft */
3090 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3091 next = ifp->tstamp + ifp->prefered_lft * HZ;
3092 spin_unlock(&ifp->lock);
3095 read_unlock(&addrconf_hash_lock);
3098 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3099 add_timer(&addr_chk_timer);
3100 spin_unlock_bh(&addrconf_verify_lock);
3103 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3105 struct in6_addr *pfx = NULL;
3108 pfx = nla_data(addr);
3111 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3114 pfx = nla_data(local);
3120 static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3121 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3122 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3123 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3127 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3129 struct net *net = sock_net(skb->sk);
3130 struct ifaddrmsg *ifm;
3131 struct nlattr *tb[IFA_MAX+1];
3132 struct in6_addr *pfx;
3135 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3139 ifm = nlmsg_data(nlh);
3140 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3144 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3147 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3148 u32 prefered_lft, u32 valid_lft)
3150 u32 flags = RTF_EXPIRES;
3152 if (!valid_lft || (prefered_lft > valid_lft))
3155 if (valid_lft == INFINITY_LIFE_TIME) {
3156 ifa_flags |= IFA_F_PERMANENT;
3158 } else if (valid_lft >= 0x7FFFFFFF/HZ)
3159 valid_lft = 0x7FFFFFFF/HZ;
3161 if (prefered_lft == 0)
3162 ifa_flags |= IFA_F_DEPRECATED;
3163 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3164 (prefered_lft != INFINITY_LIFE_TIME))
3165 prefered_lft = 0x7FFFFFFF/HZ;
3167 spin_lock_bh(&ifp->lock);
3168 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3169 ifp->tstamp = jiffies;
3170 ifp->valid_lft = valid_lft;
3171 ifp->prefered_lft = prefered_lft;
3173 spin_unlock_bh(&ifp->lock);
3174 if (!(ifp->flags&IFA_F_TENTATIVE))
3175 ipv6_ifa_notify(0, ifp);
3177 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3178 jiffies_to_clock_t(valid_lft * HZ), flags);
3185 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3187 struct net *net = sock_net(skb->sk);
3188 struct ifaddrmsg *ifm;
3189 struct nlattr *tb[IFA_MAX+1];
3190 struct in6_addr *pfx;
3191 struct inet6_ifaddr *ifa;
3192 struct net_device *dev;
3193 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3197 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3201 ifm = nlmsg_data(nlh);
3202 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3206 if (tb[IFA_CACHEINFO]) {
3207 struct ifa_cacheinfo *ci;
3209 ci = nla_data(tb[IFA_CACHEINFO]);
3210 valid_lft = ci->ifa_valid;
3211 preferred_lft = ci->ifa_prefered;
3213 preferred_lft = INFINITY_LIFE_TIME;
3214 valid_lft = INFINITY_LIFE_TIME;
3217 dev = __dev_get_by_index(net, ifm->ifa_index);
3221 /* We ignore other flags so far. */
3222 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3224 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
3227 * It would be best to check for !NLM_F_CREATE here but
3228 * userspace alreay relies on not having to provide this.
3230 return inet6_addr_add(net, ifm->ifa_index, pfx,
3231 ifm->ifa_prefixlen, ifa_flags,
3232 preferred_lft, valid_lft);
3235 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3236 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3239 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3246 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3247 u8 scope, int ifindex)
3249 struct ifaddrmsg *ifm;
3251 ifm = nlmsg_data(nlh);
3252 ifm->ifa_family = AF_INET6;
3253 ifm->ifa_prefixlen = prefixlen;
3254 ifm->ifa_flags = flags;
3255 ifm->ifa_scope = scope;
3256 ifm->ifa_index = ifindex;
3259 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3260 unsigned long tstamp, u32 preferred, u32 valid)
3262 struct ifa_cacheinfo ci;
3264 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3265 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3266 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3267 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3268 ci.ifa_prefered = preferred;
3269 ci.ifa_valid = valid;
3271 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3274 static inline int rt_scope(int ifa_scope)
3276 if (ifa_scope & IFA_HOST)
3277 return RT_SCOPE_HOST;
3278 else if (ifa_scope & IFA_LINK)
3279 return RT_SCOPE_LINK;
3280 else if (ifa_scope & IFA_SITE)
3281 return RT_SCOPE_SITE;
3283 return RT_SCOPE_UNIVERSE;
3286 static inline int inet6_ifaddr_msgsize(void)
3288 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3289 + nla_total_size(16) /* IFA_ADDRESS */
3290 + nla_total_size(sizeof(struct ifa_cacheinfo));
3293 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3294 u32 pid, u32 seq, int event, unsigned int flags)
3296 struct nlmsghdr *nlh;
3297 u32 preferred, valid;
3299 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3303 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3304 ifa->idev->dev->ifindex);
3306 if (!(ifa->flags&IFA_F_PERMANENT)) {
3307 preferred = ifa->prefered_lft;
3308 valid = ifa->valid_lft;
3309 if (preferred != INFINITY_LIFE_TIME) {
3310 long tval = (jiffies - ifa->tstamp)/HZ;
3312 if (valid != INFINITY_LIFE_TIME)
3316 preferred = INFINITY_LIFE_TIME;
3317 valid = INFINITY_LIFE_TIME;
3320 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3321 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3322 nlmsg_cancel(skb, nlh);
3326 return nlmsg_end(skb, nlh);
3329 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3330 u32 pid, u32 seq, int event, u16 flags)
3332 struct nlmsghdr *nlh;
3333 u8 scope = RT_SCOPE_UNIVERSE;
3334 int ifindex = ifmca->idev->dev->ifindex;
3336 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3337 scope = RT_SCOPE_SITE;
3339 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3343 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3344 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3345 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3346 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3347 nlmsg_cancel(skb, nlh);
3351 return nlmsg_end(skb, nlh);
3354 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3355 u32 pid, u32 seq, int event, unsigned int flags)
3357 struct nlmsghdr *nlh;
3358 u8 scope = RT_SCOPE_UNIVERSE;
3359 int ifindex = ifaca->aca_idev->dev->ifindex;
3361 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3362 scope = RT_SCOPE_SITE;
3364 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3368 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3369 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3370 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3371 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3372 nlmsg_cancel(skb, nlh);
3376 return nlmsg_end(skb, nlh);
3386 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3387 enum addr_type_t type)
3390 int s_idx, s_ip_idx;
3392 struct net_device *dev;
3393 struct inet6_dev *idev = NULL;
3394 struct inet6_ifaddr *ifa;
3395 struct ifmcaddr6 *ifmca;
3396 struct ifacaddr6 *ifaca;
3397 struct net *net = sock_net(skb->sk);
3399 s_idx = cb->args[0];
3400 s_ip_idx = ip_idx = cb->args[1];
3403 for_each_netdev(net, dev) {
3409 if ((idev = in6_dev_get(dev)) == NULL)
3411 read_lock_bh(&idev->lock);
3414 /* unicast address incl. temp addr */
3415 for (ifa = idev->addr_list; ifa;
3416 ifa = ifa->if_next, ip_idx++) {
3417 if (ip_idx < s_ip_idx)
3419 err = inet6_fill_ifaddr(skb, ifa,
3420 NETLINK_CB(cb->skb).pid,
3426 case MULTICAST_ADDR:
3427 /* multicast address */
3428 for (ifmca = idev->mc_list; ifmca;
3429 ifmca = ifmca->next, ip_idx++) {
3430 if (ip_idx < s_ip_idx)
3432 err = inet6_fill_ifmcaddr(skb, ifmca,
3433 NETLINK_CB(cb->skb).pid,
3440 /* anycast address */
3441 for (ifaca = idev->ac_list; ifaca;
3442 ifaca = ifaca->aca_next, ip_idx++) {
3443 if (ip_idx < s_ip_idx)
3445 err = inet6_fill_ifacaddr(skb, ifaca,
3446 NETLINK_CB(cb->skb).pid,
3455 read_unlock_bh(&idev->lock);
3464 cb->args[1] = ip_idx;
3468 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3470 enum addr_type_t type = UNICAST_ADDR;
3472 return inet6_dump_addr(skb, cb, type);
3475 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3477 enum addr_type_t type = MULTICAST_ADDR;
3479 return inet6_dump_addr(skb, cb, type);
3483 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3485 enum addr_type_t type = ANYCAST_ADDR;
3487 return inet6_dump_addr(skb, cb, type);
3490 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3493 struct net *net = sock_net(in_skb->sk);
3494 struct ifaddrmsg *ifm;
3495 struct nlattr *tb[IFA_MAX+1];
3496 struct in6_addr *addr = NULL;
3497 struct net_device *dev = NULL;
3498 struct inet6_ifaddr *ifa;
3499 struct sk_buff *skb;
3502 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3506 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3512 ifm = nlmsg_data(nlh);
3514 dev = __dev_get_by_index(net, ifm->ifa_index);
3516 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
3517 err = -EADDRNOTAVAIL;
3521 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3526 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3527 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3529 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3530 WARN_ON(err == -EMSGSIZE);
3534 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
3541 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3543 struct sk_buff *skb;
3544 struct net *net = dev_net(ifa->idev->dev);
3547 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3551 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3553 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3554 WARN_ON(err == -EMSGSIZE);
3558 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3561 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3564 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3565 __s32 *array, int bytes)
3567 BUG_ON(bytes < (DEVCONF_MAX * 4));
3569 memset(array, 0, bytes);
3570 array[DEVCONF_FORWARDING] = cnf->forwarding;
3571 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3572 array[DEVCONF_MTU6] = cnf->mtu6;
3573 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3574 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3575 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3576 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3577 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3578 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3579 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3580 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3581 #ifdef CONFIG_IPV6_PRIVACY
3582 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3583 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3584 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3585 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3586 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3588 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3589 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3590 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3591 #ifdef CONFIG_IPV6_ROUTER_PREF
3592 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3593 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3594 #ifdef CONFIG_IPV6_ROUTE_INFO
3595 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3598 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3599 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3600 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3601 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3603 #ifdef CONFIG_IPV6_MROUTE
3604 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3608 static inline size_t inet6_if_nlmsg_size(void)
3610 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3611 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3612 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3613 + nla_total_size(4) /* IFLA_MTU */
3614 + nla_total_size(4) /* IFLA_LINK */
3615 + nla_total_size( /* IFLA_PROTINFO */
3616 nla_total_size(4) /* IFLA_INET6_FLAGS */
3617 + nla_total_size(sizeof(struct ifla_cacheinfo))
3618 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3619 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3620 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3624 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3628 int pad = bytes - sizeof(u64) * items;
3631 /* Use put_unaligned() because stats may not be aligned for u64. */
3632 put_unaligned(items, &stats[0]);
3633 for (i = 1; i < items; i++)
3634 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3636 memset(&stats[items], 0, pad);
3639 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3643 case IFLA_INET6_STATS:
3644 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3646 case IFLA_INET6_ICMP6STATS:
3647 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3652 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3653 u32 pid, u32 seq, int event, unsigned int flags)
3655 struct net_device *dev = idev->dev;
3657 struct ifinfomsg *hdr;
3658 struct nlmsghdr *nlh;
3660 struct ifla_cacheinfo ci;
3662 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3666 hdr = nlmsg_data(nlh);
3667 hdr->ifi_family = AF_INET6;
3669 hdr->ifi_type = dev->type;
3670 hdr->ifi_index = dev->ifindex;
3671 hdr->ifi_flags = dev_get_flags(dev);
3672 hdr->ifi_change = 0;
3674 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3677 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3679 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3680 if (dev->ifindex != dev->iflink)
3681 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3683 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3684 if (protoinfo == NULL)
3685 goto nla_put_failure;
3687 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3689 ci.max_reasm_len = IPV6_MAXPLEN;
3690 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3691 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3692 ci.reachable_time = idev->nd_parms->reachable_time;
3693 ci.retrans_time = idev->nd_parms->retrans_time;
3694 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3696 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3698 goto nla_put_failure;
3699 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3701 /* XXX - MC not implemented */
3703 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3705 goto nla_put_failure;
3706 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3708 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3710 goto nla_put_failure;
3711 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3713 nla_nest_end(skb, protoinfo);
3714 return nlmsg_end(skb, nlh);
3717 nlmsg_cancel(skb, nlh);
3721 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3723 struct net *net = sock_net(skb->sk);
3725 int s_idx = cb->args[0];
3726 struct net_device *dev;
3727 struct inet6_dev *idev;
3729 read_lock(&dev_base_lock);
3731 for_each_netdev(net, dev) {
3734 if ((idev = in6_dev_get(dev)) == NULL)
3736 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3737 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3744 read_unlock(&dev_base_lock);
3750 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3752 struct sk_buff *skb;
3753 struct net *net = dev_net(idev->dev);
3756 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3760 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3762 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3763 WARN_ON(err == -EMSGSIZE);
3767 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3770 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
3773 static inline size_t inet6_prefix_nlmsg_size(void)
3775 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3776 + nla_total_size(sizeof(struct in6_addr))
3777 + nla_total_size(sizeof(struct prefix_cacheinfo));
3780 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3781 struct prefix_info *pinfo, u32 pid, u32 seq,
3782 int event, unsigned int flags)
3784 struct prefixmsg *pmsg;
3785 struct nlmsghdr *nlh;
3786 struct prefix_cacheinfo ci;
3788 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3792 pmsg = nlmsg_data(nlh);
3793 pmsg->prefix_family = AF_INET6;
3794 pmsg->prefix_pad1 = 0;
3795 pmsg->prefix_pad2 = 0;
3796 pmsg->prefix_ifindex = idev->dev->ifindex;
3797 pmsg->prefix_len = pinfo->prefix_len;
3798 pmsg->prefix_type = pinfo->type;
3799 pmsg->prefix_pad3 = 0;
3800 pmsg->prefix_flags = 0;
3802 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3803 if (pinfo->autoconf)
3804 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3806 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3808 ci.preferred_time = ntohl(pinfo->prefered);
3809 ci.valid_time = ntohl(pinfo->valid);
3810 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3812 return nlmsg_end(skb, nlh);
3815 nlmsg_cancel(skb, nlh);
3819 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3820 struct prefix_info *pinfo)
3822 struct sk_buff *skb;
3823 struct net *net = dev_net(idev->dev);
3826 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3830 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3832 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3833 WARN_ON(err == -EMSGSIZE);
3837 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3840 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
3843 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3845 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3850 * If the address was optimistic
3851 * we inserted the route at the start of
3852 * our DAD process, so we don't need
3855 if (!(ifp->rt->rt6i_node))
3856 ip6_ins_rt(ifp->rt);
3857 if (ifp->idev->cnf.forwarding)
3858 addrconf_join_anycast(ifp);
3861 if (ifp->idev->cnf.forwarding)
3862 addrconf_leave_anycast(ifp);
3863 addrconf_leave_solict(ifp->idev, &ifp->addr);
3864 dst_hold(&ifp->rt->u.dst);
3865 if (ip6_del_rt(ifp->rt))
3866 dst_free(&ifp->rt->u.dst);
3871 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3874 if (likely(ifp->idev->dead == 0))
3875 __ipv6_ifa_notify(event, ifp);
3876 rcu_read_unlock_bh();
3879 #ifdef CONFIG_SYSCTL
3882 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3883 void __user *buffer, size_t *lenp, loff_t *ppos)
3885 int *valp = ctl->data;
3889 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3892 addrconf_fixup_forwarding(ctl, valp, val);
3896 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3897 int __user *name, int nlen,
3898 void __user *oldval,
3899 size_t __user *oldlenp,
3900 void __user *newval, size_t newlen)
3902 int *valp = table->data;
3906 if (!newval || !newlen)
3908 if (newlen != sizeof(int))
3910 if (get_user(new, (int __user *)newval))
3914 if (oldval && oldlenp) {
3916 if (get_user(len, oldlenp))
3919 if (len > table->maxlen)
3920 len = table->maxlen;
3921 if (copy_to_user(oldval, valp, len))
3923 if (put_user(len, oldlenp))
3929 addrconf_fixup_forwarding(table, valp, val);
3933 static struct addrconf_sysctl_table
3935 struct ctl_table_header *sysctl_header;
3936 ctl_table addrconf_vars[DEVCONF_MAX+1];
3938 } addrconf_sysctl __read_mostly = {
3939 .sysctl_header = NULL,
3942 .ctl_name = NET_IPV6_FORWARDING,
3943 .procname = "forwarding",
3944 .data = &ipv6_devconf.forwarding,
3945 .maxlen = sizeof(int),
3947 .proc_handler = &addrconf_sysctl_forward,
3948 .strategy = &addrconf_sysctl_forward_strategy,
3951 .ctl_name = NET_IPV6_HOP_LIMIT,
3952 .procname = "hop_limit",
3953 .data = &ipv6_devconf.hop_limit,
3954 .maxlen = sizeof(int),
3956 .proc_handler = proc_dointvec,
3959 .ctl_name = NET_IPV6_MTU,
3961 .data = &ipv6_devconf.mtu6,
3962 .maxlen = sizeof(int),
3964 .proc_handler = &proc_dointvec,
3967 .ctl_name = NET_IPV6_ACCEPT_RA,
3968 .procname = "accept_ra",
3969 .data = &ipv6_devconf.accept_ra,
3970 .maxlen = sizeof(int),
3972 .proc_handler = &proc_dointvec,
3975 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3976 .procname = "accept_redirects",
3977 .data = &ipv6_devconf.accept_redirects,
3978 .maxlen = sizeof(int),
3980 .proc_handler = &proc_dointvec,
3983 .ctl_name = NET_IPV6_AUTOCONF,
3984 .procname = "autoconf",
3985 .data = &ipv6_devconf.autoconf,
3986 .maxlen = sizeof(int),
3988 .proc_handler = &proc_dointvec,
3991 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3992 .procname = "dad_transmits",
3993 .data = &ipv6_devconf.dad_transmits,
3994 .maxlen = sizeof(int),
3996 .proc_handler = &proc_dointvec,
3999 .ctl_name = NET_IPV6_RTR_SOLICITS,
4000 .procname = "router_solicitations",
4001 .data = &ipv6_devconf.rtr_solicits,
4002 .maxlen = sizeof(int),
4004 .proc_handler = &proc_dointvec,
4007 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4008 .procname = "router_solicitation_interval",
4009 .data = &ipv6_devconf.rtr_solicit_interval,
4010 .maxlen = sizeof(int),
4012 .proc_handler = &proc_dointvec_jiffies,
4013 .strategy = &sysctl_jiffies,
4016 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4017 .procname = "router_solicitation_delay",
4018 .data = &ipv6_devconf.rtr_solicit_delay,
4019 .maxlen = sizeof(int),
4021 .proc_handler = &proc_dointvec_jiffies,
4022 .strategy = &sysctl_jiffies,
4025 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4026 .procname = "force_mld_version",
4027 .data = &ipv6_devconf.force_mld_version,
4028 .maxlen = sizeof(int),
4030 .proc_handler = &proc_dointvec,
4032 #ifdef CONFIG_IPV6_PRIVACY
4034 .ctl_name = NET_IPV6_USE_TEMPADDR,
4035 .procname = "use_tempaddr",
4036 .data = &ipv6_devconf.use_tempaddr,
4037 .maxlen = sizeof(int),
4039 .proc_handler = &proc_dointvec,
4042 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4043 .procname = "temp_valid_lft",
4044 .data = &ipv6_devconf.temp_valid_lft,
4045 .maxlen = sizeof(int),
4047 .proc_handler = &proc_dointvec,
4050 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4051 .procname = "temp_prefered_lft",
4052 .data = &ipv6_devconf.temp_prefered_lft,
4053 .maxlen = sizeof(int),
4055 .proc_handler = &proc_dointvec,
4058 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4059 .procname = "regen_max_retry",
4060 .data = &ipv6_devconf.regen_max_retry,
4061 .maxlen = sizeof(int),
4063 .proc_handler = &proc_dointvec,
4066 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4067 .procname = "max_desync_factor",
4068 .data = &ipv6_devconf.max_desync_factor,
4069 .maxlen = sizeof(int),
4071 .proc_handler = &proc_dointvec,
4075 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4076 .procname = "max_addresses",
4077 .data = &ipv6_devconf.max_addresses,
4078 .maxlen = sizeof(int),
4080 .proc_handler = &proc_dointvec,
4083 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4084 .procname = "accept_ra_defrtr",
4085 .data = &ipv6_devconf.accept_ra_defrtr,
4086 .maxlen = sizeof(int),
4088 .proc_handler = &proc_dointvec,
4091 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4092 .procname = "accept_ra_pinfo",
4093 .data = &ipv6_devconf.accept_ra_pinfo,
4094 .maxlen = sizeof(int),
4096 .proc_handler = &proc_dointvec,
4098 #ifdef CONFIG_IPV6_ROUTER_PREF
4100 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4101 .procname = "accept_ra_rtr_pref",
4102 .data = &ipv6_devconf.accept_ra_rtr_pref,
4103 .maxlen = sizeof(int),
4105 .proc_handler = &proc_dointvec,
4108 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4109 .procname = "router_probe_interval",
4110 .data = &ipv6_devconf.rtr_probe_interval,
4111 .maxlen = sizeof(int),
4113 .proc_handler = &proc_dointvec_jiffies,
4114 .strategy = &sysctl_jiffies,
4116 #ifdef CONFIG_IPV6_ROUTE_INFO
4118 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4119 .procname = "accept_ra_rt_info_max_plen",
4120 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4121 .maxlen = sizeof(int),
4123 .proc_handler = &proc_dointvec,
4128 .ctl_name = NET_IPV6_PROXY_NDP,
4129 .procname = "proxy_ndp",
4130 .data = &ipv6_devconf.proxy_ndp,
4131 .maxlen = sizeof(int),
4133 .proc_handler = &proc_dointvec,
4136 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4137 .procname = "accept_source_route",
4138 .data = &ipv6_devconf.accept_source_route,
4139 .maxlen = sizeof(int),
4141 .proc_handler = &proc_dointvec,
4143 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4145 .ctl_name = CTL_UNNUMBERED,
4146 .procname = "optimistic_dad",
4147 .data = &ipv6_devconf.optimistic_dad,
4148 .maxlen = sizeof(int),
4150 .proc_handler = &proc_dointvec,
4154 #ifdef CONFIG_IPV6_MROUTE
4156 .ctl_name = CTL_UNNUMBERED,
4157 .procname = "mc_forwarding",
4158 .data = &ipv6_devconf.mc_forwarding,
4159 .maxlen = sizeof(int),
4161 .proc_handler = &proc_dointvec,
4165 .ctl_name = 0, /* sentinel */
4170 static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4171 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
4174 struct addrconf_sysctl_table *t;
4176 #define ADDRCONF_CTL_PATH_DEV 3
4178 struct ctl_path addrconf_ctl_path[] = {
4179 { .procname = "net", .ctl_name = CTL_NET, },
4180 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4181 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4182 { /* to be set */ },
4187 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4191 for (i=0; t->addrconf_vars[i].data; i++) {
4192 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4193 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4194 t->addrconf_vars[i].extra2 = net;
4198 * Make a copy of dev_name, because '.procname' is regarded as const
4199 * by sysctl and we wouldn't want anyone to change it under our feet
4200 * (see SIOCSIFNAME).
4202 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4206 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4207 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
4209 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
4211 if (t->sysctl_header == NULL)
4225 static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4227 struct addrconf_sysctl_table *t;
4229 if (p->sysctl == NULL)
4234 unregister_sysctl_table(t->sysctl_header);
4239 static void addrconf_sysctl_register(struct inet6_dev *idev)
4241 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4242 NET_IPV6_NEIGH, "ipv6",
4243 &ndisc_ifinfo_sysctl_change,
4245 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4246 idev->dev->ifindex, idev, &idev->cnf);
4249 static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4251 __addrconf_sysctl_unregister(&idev->cnf);
4252 neigh_sysctl_unregister(idev->nd_parms);
4258 static int addrconf_init_net(struct net *net)
4261 struct ipv6_devconf *all, *dflt;
4264 all = &ipv6_devconf;
4265 dflt = &ipv6_devconf_dflt;
4267 if (net != &init_net) {
4268 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4272 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4274 goto err_alloc_dflt;
4277 net->ipv6.devconf_all = all;
4278 net->ipv6.devconf_dflt = dflt;
4280 #ifdef CONFIG_SYSCTL
4281 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4286 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4293 #ifdef CONFIG_SYSCTL
4295 __addrconf_sysctl_unregister(all);
4305 static void addrconf_exit_net(struct net *net)
4307 #ifdef CONFIG_SYSCTL
4308 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4309 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4311 if (net != &init_net) {
4312 kfree(net->ipv6.devconf_dflt);
4313 kfree(net->ipv6.devconf_all);
4317 static struct pernet_operations addrconf_ops = {
4318 .init = addrconf_init_net,
4319 .exit = addrconf_exit_net,
4326 int register_inet6addr_notifier(struct notifier_block *nb)
4328 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4331 EXPORT_SYMBOL(register_inet6addr_notifier);
4333 int unregister_inet6addr_notifier(struct notifier_block *nb)
4335 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4338 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4341 static int addrconf_net_init(struct net *net)
4346 static void addrconf_net_exit(struct net *net)
4348 struct net_device *dev;
4351 /* clean dev list */
4352 for_each_netdev(net, dev) {
4353 if (__in6_dev_get(dev) == NULL)
4355 addrconf_ifdown(dev, 1);
4357 addrconf_ifdown(net->loopback_dev, 2);
4361 static struct pernet_operations addrconf_net_ops = {
4362 .init = addrconf_net_init,
4363 .exit = addrconf_net_exit,
4367 * Init / cleanup code
4370 int __init addrconf_init(void)
4374 if ((err = ipv6_addr_label_init()) < 0) {
4375 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4380 register_pernet_subsys(&addrconf_ops);
4382 /* The addrconf netdev notifier requires that loopback_dev
4383 * has it's ipv6 private information allocated and setup
4384 * before it can bring up and give link-local addresses
4385 * to other devices which are up.
4387 * Unfortunately, loopback_dev is not necessarily the first
4388 * entry in the global dev_base list of net devices. In fact,
4389 * it is likely to be the very last entry on that list.
4390 * So this causes the notifier registry below to try and
4391 * give link-local addresses to all devices besides loopback_dev
4392 * first, then loopback_dev, which cases all the non-loopback_dev
4393 * devices to fail to get a link-local address.
4395 * So, as a temporary fix, allocate the ipv6 structure for
4396 * loopback_dev first by hand.
4397 * Longer term, all of the dependencies ipv6 has upon the loopback
4398 * device and it being up should be removed.
4401 if (!ipv6_add_dev(init_net.loopback_dev))
4407 err = register_pernet_device(&addrconf_net_ops);
4411 register_netdevice_notifier(&ipv6_dev_notf);
4415 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4419 /* Only the first call to __rtnl_register can fail */
4420 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4421 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4422 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4423 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4424 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4426 ipv6_addr_label_rtnl_register();
4430 unregister_netdevice_notifier(&ipv6_dev_notf);
4432 unregister_pernet_subsys(&addrconf_ops);
4437 void addrconf_cleanup(void)
4439 struct inet6_ifaddr *ifa;
4442 unregister_netdevice_notifier(&ipv6_dev_notf);
4443 unregister_pernet_device(&addrconf_net_ops);
4445 unregister_pernet_subsys(&addrconf_ops);
4452 write_lock_bh(&addrconf_hash_lock);
4453 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4454 for (ifa=inet6_addr_lst[i]; ifa; ) {
4455 struct inet6_ifaddr *bifa;
4458 ifa = ifa->lst_next;
4459 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4460 /* Do not free it; something is wrong.
4461 Now we can investigate it with debugger.
4465 write_unlock_bh(&addrconf_hash_lock);
4467 del_timer(&addr_chk_timer);
4470 unregister_pernet_subsys(&addrconf_net_ops);