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>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <net/netlink.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
83 #include <asm/uaccess.h>
85 #include <linux/proc_fs.h>
86 #include <linux/seq_file.h>
88 /* Set to 3 to get tracing... */
92 #define ADBG(x) printk x
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
98 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
102 static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
105 #ifdef CONFIG_IPV6_PRIVACY
106 static int __ipv6_regen_rndid(struct inet6_dev *idev);
107 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
108 static void ipv6_regen_rndid(unsigned long data);
110 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
113 static int ipv6_count_addresses(struct inet6_dev *idev);
116 * Configured unicast address hash table
118 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
119 static DEFINE_RWLOCK(addrconf_hash_lock);
121 static void addrconf_verify(unsigned long);
123 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
124 static DEFINE_SPINLOCK(addrconf_verify_lock);
126 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
127 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
129 static int addrconf_ifdown(struct net_device *dev, int how);
131 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
132 static void addrconf_dad_timer(unsigned long data);
133 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
134 static void addrconf_dad_run(struct inet6_dev *idev);
135 static void addrconf_rs_timer(unsigned long data);
136 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
137 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
139 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
140 struct prefix_info *pinfo);
141 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
143 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
145 struct ipv6_devconf ipv6_devconf __read_mostly = {
147 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
148 .mtu6 = IPV6_MIN_MTU,
150 .accept_redirects = 1,
152 .force_mld_version = 0,
154 .rtr_solicits = MAX_RTR_SOLICITATIONS,
155 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
156 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
157 #ifdef CONFIG_IPV6_PRIVACY
159 .temp_valid_lft = TEMP_VALID_LIFETIME,
160 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
161 .regen_max_retry = REGEN_MAX_RETRY,
162 .max_desync_factor = MAX_DESYNC_FACTOR,
164 .max_addresses = IPV6_MAX_ADDRESSES,
165 .accept_ra_defrtr = 1,
166 .accept_ra_pinfo = 1,
167 #ifdef CONFIG_IPV6_ROUTER_PREF
168 .accept_ra_rtr_pref = 1,
169 .rtr_probe_interval = 60 * HZ,
170 #ifdef CONFIG_IPV6_ROUTE_INFO
171 .accept_ra_rt_info_max_plen = 0,
177 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
179 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
180 .mtu6 = IPV6_MIN_MTU,
182 .accept_redirects = 1,
185 .rtr_solicits = MAX_RTR_SOLICITATIONS,
186 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
187 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
188 #ifdef CONFIG_IPV6_PRIVACY
190 .temp_valid_lft = TEMP_VALID_LIFETIME,
191 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
192 .regen_max_retry = REGEN_MAX_RETRY,
193 .max_desync_factor = MAX_DESYNC_FACTOR,
195 .max_addresses = IPV6_MAX_ADDRESSES,
196 .accept_ra_defrtr = 1,
197 .accept_ra_pinfo = 1,
198 #ifdef CONFIG_IPV6_ROUTER_PREF
199 .accept_ra_rtr_pref = 1,
200 .rtr_probe_interval = 60 * HZ,
201 #ifdef CONFIG_IPV6_ROUTE_INFO
202 .accept_ra_rt_info_max_plen = 0,
208 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
210 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
212 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
214 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
216 if (del_timer(&ifp->timer))
220 enum addrconf_timer_t
227 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
228 enum addrconf_timer_t what,
231 if (!del_timer(&ifp->timer))
236 ifp->timer.function = addrconf_dad_timer;
239 ifp->timer.function = addrconf_rs_timer;
243 ifp->timer.expires = jiffies + when;
244 add_timer(&ifp->timer);
247 /* Nobody refers to this device, we may destroy it. */
249 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
251 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
255 void in6_dev_finish_destroy(struct inet6_dev *idev)
257 struct net_device *dev = idev->dev;
258 BUG_TRAP(idev->addr_list==NULL);
259 BUG_TRAP(idev->mc_list==NULL);
260 #ifdef NET_REFCNT_DEBUG
261 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
265 printk("Freeing alive inet6 device %p\n", idev);
268 snmp6_free_dev(idev);
269 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
272 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
274 struct inet6_dev *ndev;
275 struct in6_addr maddr;
279 if (dev->mtu < IPV6_MIN_MTU)
282 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
287 rwlock_init(&ndev->lock);
289 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
290 ndev->cnf.mtu6 = dev->mtu;
291 ndev->cnf.sysctl = NULL;
292 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
293 if (ndev->nd_parms == NULL) {
297 /* We refer to the device */
300 if (snmp6_alloc_dev(ndev) < 0) {
302 "%s(): cannot allocate memory for statistics; dev=%s.\n",
303 __FUNCTION__, dev->name));
304 neigh_parms_release(&nd_tbl, ndev->nd_parms);
306 in6_dev_finish_destroy(ndev);
310 if (snmp6_register_dev(ndev) < 0) {
312 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
313 __FUNCTION__, dev->name));
314 neigh_parms_release(&nd_tbl, ndev->nd_parms);
316 in6_dev_finish_destroy(ndev);
320 /* One reference from device. We must do this before
321 * we invoke __ipv6_regen_rndid().
325 #ifdef CONFIG_IPV6_PRIVACY
326 init_timer(&ndev->regen_timer);
327 ndev->regen_timer.function = ipv6_regen_rndid;
328 ndev->regen_timer.data = (unsigned long) ndev;
329 if ((dev->flags&IFF_LOOPBACK) ||
330 dev->type == ARPHRD_TUNNEL ||
331 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
332 dev->type == ARPHRD_SIT ||
334 dev->type == ARPHRD_NONE) {
336 "%s: Disabled Privacy Extensions\n",
338 ndev->cnf.use_tempaddr = -1;
341 ipv6_regen_rndid((unsigned long) ndev);
345 if (netif_carrier_ok(dev))
346 ndev->if_flags |= IF_READY;
349 ipv6_mc_init_dev(ndev);
350 ndev->tstamp = jiffies;
352 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
353 NET_IPV6_NEIGH, "ipv6",
354 &ndisc_ifinfo_sysctl_change,
356 addrconf_sysctl_register(ndev, &ndev->cnf);
358 /* protected by rtnl_lock */
359 rcu_assign_pointer(dev->ip6_ptr, ndev);
361 /* Join all-node multicast group */
362 ipv6_addr_all_nodes(&maddr);
363 ipv6_dev_mc_inc(dev, &maddr);
368 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
370 struct inet6_dev *idev;
374 if ((idev = __in6_dev_get(dev)) == NULL) {
375 if ((idev = ipv6_add_dev(dev)) == NULL)
379 if (dev->flags&IFF_UP)
385 static void dev_forward_change(struct inet6_dev *idev)
387 struct net_device *dev;
388 struct inet6_ifaddr *ifa;
389 struct in6_addr addr;
394 if (dev && (dev->flags & IFF_MULTICAST)) {
395 ipv6_addr_all_routers(&addr);
397 if (idev->cnf.forwarding)
398 ipv6_dev_mc_inc(dev, &addr);
400 ipv6_dev_mc_dec(dev, &addr);
402 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
403 if (idev->cnf.forwarding)
404 addrconf_join_anycast(ifa);
406 addrconf_leave_anycast(ifa);
411 static void addrconf_forward_change(void)
413 struct net_device *dev;
414 struct inet6_dev *idev;
416 read_lock(&dev_base_lock);
417 for (dev=dev_base; dev; dev=dev->next) {
419 idev = __in6_dev_get(dev);
421 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
422 idev->cnf.forwarding = ipv6_devconf.forwarding;
424 dev_forward_change(idev);
428 read_unlock(&dev_base_lock);
432 /* Nobody refers to this ifaddr, destroy it */
434 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
436 BUG_TRAP(ifp->if_next==NULL);
437 BUG_TRAP(ifp->lst_next==NULL);
438 #ifdef NET_REFCNT_DEBUG
439 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
442 in6_dev_put(ifp->idev);
444 if (del_timer(&ifp->timer))
445 printk("Timer is still running, when freeing ifa=%p\n", ifp);
448 printk("Freeing alive inet6 address %p\n", ifp);
451 dst_release(&ifp->rt->u.dst);
457 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
459 struct inet6_ifaddr *ifa, **ifap;
460 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
463 * Each device address list is sorted in order of scope -
464 * global before linklocal.
466 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
467 ifap = &ifa->if_next) {
468 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
472 ifp->if_next = *ifap;
476 /* On success it returns ifp with increased reference count */
478 static struct inet6_ifaddr *
479 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
480 int scope, u32 flags)
482 struct inet6_ifaddr *ifa = NULL;
489 err = -ENODEV; /*XXX*/
493 write_lock(&addrconf_hash_lock);
495 /* Ignore adding duplicate addresses on an interface */
496 if (ipv6_chk_same_addr(addr, idev->dev)) {
497 ADBG(("ipv6_add_addr: already assigned\n"));
502 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
505 ADBG(("ipv6_add_addr: malloc failed\n"));
510 rt = addrconf_dst_alloc(idev, addr, 0);
516 ipv6_addr_copy(&ifa->addr, addr);
518 spin_lock_init(&ifa->lock);
519 init_timer(&ifa->timer);
520 ifa->timer.data = (unsigned long) ifa;
522 ifa->prefix_len = pfxlen;
523 ifa->flags = flags | IFA_F_TENTATIVE;
524 ifa->cstamp = ifa->tstamp = jiffies;
533 /* Add to big hash table */
534 hash = ipv6_addr_hash(addr);
536 ifa->lst_next = inet6_addr_lst[hash];
537 inet6_addr_lst[hash] = ifa;
539 write_unlock(&addrconf_hash_lock);
541 write_lock(&idev->lock);
542 /* Add to inet6_dev unicast addr list. */
543 ipv6_link_dev_addr(idev, ifa);
545 #ifdef CONFIG_IPV6_PRIVACY
546 if (ifa->flags&IFA_F_TEMPORARY) {
547 ifa->tmp_next = idev->tempaddr_list;
548 idev->tempaddr_list = ifa;
554 write_unlock(&idev->lock);
556 rcu_read_unlock_bh();
558 if (likely(err == 0))
559 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
567 write_unlock(&addrconf_hash_lock);
571 /* This function wants to get referenced ifp and releases it before return */
573 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
575 struct inet6_ifaddr *ifa, **ifap;
576 struct inet6_dev *idev = ifp->idev;
578 int deleted = 0, onlink = 0;
579 unsigned long expires = jiffies;
581 hash = ipv6_addr_hash(&ifp->addr);
585 write_lock_bh(&addrconf_hash_lock);
586 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
587 ifap = &ifa->lst_next) {
589 *ifap = ifa->lst_next;
591 ifa->lst_next = NULL;
595 write_unlock_bh(&addrconf_hash_lock);
597 write_lock_bh(&idev->lock);
598 #ifdef CONFIG_IPV6_PRIVACY
599 if (ifp->flags&IFA_F_TEMPORARY) {
600 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
601 ifap = &ifa->tmp_next) {
603 *ifap = ifa->tmp_next;
605 in6_ifa_put(ifp->ifpub);
609 ifa->tmp_next = NULL;
616 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
618 *ifap = ifa->if_next;
621 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
625 } else if (ifp->flags & IFA_F_PERMANENT) {
626 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
628 if (ifa->flags & IFA_F_PERMANENT) {
633 unsigned long lifetime;
638 spin_lock(&ifa->lock);
639 lifetime = min_t(unsigned long,
640 ifa->valid_lft, 0x7fffffffUL/HZ);
641 if (time_before(expires,
642 ifa->tstamp + lifetime * HZ))
643 expires = ifa->tstamp + lifetime * HZ;
644 spin_unlock(&ifa->lock);
648 ifap = &ifa->if_next;
650 write_unlock_bh(&idev->lock);
652 ipv6_ifa_notify(RTM_DELADDR, ifp);
654 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
656 addrconf_del_timer(ifp);
659 * Purge or update corresponding prefix
661 * 1) we don't purge prefix here if address was not permanent.
662 * prefix is managed by its own lifetime.
663 * 2) if there're no addresses, delete prefix.
664 * 3) if there're still other permanent address(es),
665 * corresponding prefix is still permanent.
666 * 4) otherwise, update prefix lifetime to the
667 * longest valid lifetime among the corresponding
668 * addresses on the device.
669 * Note: subsequent RA will update lifetime.
673 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
674 struct in6_addr prefix;
677 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
678 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
680 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
684 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
685 rt->rt6i_expires = expires;
686 rt->rt6i_flags |= RTF_EXPIRES;
689 dst_release(&rt->u.dst);
695 #ifdef CONFIG_IPV6_PRIVACY
696 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
698 struct inet6_dev *idev = ifp->idev;
699 struct in6_addr addr, *tmpaddr;
700 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
705 write_lock(&idev->lock);
707 spin_lock_bh(&ift->lock);
708 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
709 spin_unlock_bh(&ift->lock);
716 if (idev->cnf.use_tempaddr <= 0) {
717 write_unlock(&idev->lock);
719 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
724 spin_lock_bh(&ifp->lock);
725 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
726 idev->cnf.use_tempaddr = -1; /*XXX*/
727 spin_unlock_bh(&ifp->lock);
728 write_unlock(&idev->lock);
730 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
736 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
737 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
738 spin_unlock_bh(&ifp->lock);
739 write_unlock(&idev->lock);
741 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
747 memcpy(&addr.s6_addr[8], idev->rndid, 8);
748 tmp_valid_lft = min_t(__u32,
750 idev->cnf.temp_valid_lft);
751 tmp_prefered_lft = min_t(__u32,
753 idev->cnf.temp_prefered_lft - desync_factor / HZ);
754 tmp_plen = ifp->prefix_len;
755 max_addresses = idev->cnf.max_addresses;
756 tmp_cstamp = ifp->cstamp;
757 tmp_tstamp = ifp->tstamp;
758 spin_unlock_bh(&ifp->lock);
760 write_unlock(&idev->lock);
761 ift = !max_addresses ||
762 ipv6_count_addresses(idev) < max_addresses ?
763 ipv6_add_addr(idev, &addr, tmp_plen,
764 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
765 if (!ift || IS_ERR(ift)) {
769 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
771 write_lock(&idev->lock);
775 spin_lock_bh(&ift->lock);
777 ift->valid_lft = tmp_valid_lft;
778 ift->prefered_lft = tmp_prefered_lft;
779 ift->cstamp = tmp_cstamp;
780 ift->tstamp = tmp_tstamp;
781 spin_unlock_bh(&ift->lock);
783 addrconf_dad_start(ift, 0);
792 * Choose an appropriate source address (RFC3484)
794 struct ipv6_saddr_score {
802 #define IPV6_SADDR_SCORE_LOCAL 0x0001
803 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
804 #define IPV6_SADDR_SCORE_HOA 0x0008
805 #define IPV6_SADDR_SCORE_OIF 0x0010
806 #define IPV6_SADDR_SCORE_LABEL 0x0020
807 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
809 static int inline ipv6_saddr_preferred(int type)
811 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
812 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
817 /* static matching label */
818 static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
821 * prefix (longest match) label
822 * -----------------------------
831 if (type & IPV6_ADDR_LOOPBACK)
833 else if (type & IPV6_ADDR_COMPATv4)
835 else if (type & IPV6_ADDR_MAPPED)
837 else if (addr->s6_addr32[0] == htonl(0x20010000))
839 else if (addr->s6_addr16[0] == htons(0x2002))
841 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
846 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
847 struct in6_addr *daddr, struct in6_addr *saddr)
849 struct ipv6_saddr_score hiscore;
850 struct inet6_ifaddr *ifa_result = NULL;
851 int daddr_type = __ipv6_addr_type(daddr);
852 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
853 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
854 struct net_device *dev;
856 memset(&hiscore, 0, sizeof(hiscore));
858 read_lock(&dev_base_lock);
861 for (dev = dev_base; dev; dev=dev->next) {
862 struct inet6_dev *idev;
863 struct inet6_ifaddr *ifa;
865 /* Rule 0: Candidate Source Address (section 4)
866 * - multicast and link-local destination address,
867 * the set of candidate source address MUST only
868 * include addresses assigned to interfaces
869 * belonging to the same link as the outgoing
871 * (- For site-local destination addresses, the
872 * set of candidate source addresses MUST only
873 * include addresses assigned to interfaces
874 * belonging to the same site as the outgoing
877 if ((daddr_type & IPV6_ADDR_MULTICAST ||
878 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
879 daddr_dev && dev != daddr_dev)
882 idev = __in6_dev_get(dev);
886 read_lock_bh(&idev->lock);
887 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
888 struct ipv6_saddr_score score;
890 score.addr_type = __ipv6_addr_type(&ifa->addr);
893 * - Tentative Address (RFC2462 section 5.4)
894 * - A tentative address is not considered
895 * "assigned to an interface" in the traditional
897 * - Candidate Source Address (section 4)
898 * - In any case, anycast addresses, multicast
899 * addresses, and the unspecified address MUST
900 * NOT be included in a candidate set.
902 if (ifa->flags & IFA_F_TENTATIVE)
904 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
905 score.addr_type & IPV6_ADDR_MULTICAST)) {
906 LIMIT_NETDEBUG(KERN_DEBUG
907 "ADDRCONF: unspecified / multicast address"
908 "assigned as unicast address on %s",
918 if (ifa_result == NULL) {
919 /* record it if the first available entry */
923 /* Rule 1: Prefer same address */
924 if (hiscore.rule < 1) {
925 if (ipv6_addr_equal(&ifa_result->addr, daddr))
926 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
929 if (ipv6_addr_equal(&ifa->addr, daddr)) {
930 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
931 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
936 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
940 /* Rule 2: Prefer appropriate scope */
941 if (hiscore.rule < 2) {
942 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
945 score.scope = __ipv6_addr_src_scope(score.addr_type);
946 if (hiscore.scope < score.scope) {
947 if (hiscore.scope < daddr_scope) {
952 } else if (score.scope < hiscore.scope) {
953 if (score.scope < daddr_scope)
954 break; /* addresses sorted by scope */
961 /* Rule 3: Avoid deprecated address */
962 if (hiscore.rule < 3) {
963 if (ipv6_saddr_preferred(hiscore.addr_type) ||
964 !(ifa_result->flags & IFA_F_DEPRECATED))
965 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
968 if (ipv6_saddr_preferred(score.addr_type) ||
969 !(ifa->flags & IFA_F_DEPRECATED)) {
970 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
971 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
976 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
980 /* Rule 4: Prefer home address */
981 #ifdef CONFIG_IPV6_MIP6
982 if (hiscore.rule < 4) {
983 if (ifa_result->flags & IFA_F_HOMEADDRESS)
984 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
987 if (ifa->flags & IFA_F_HOMEADDRESS) {
988 score.attrs |= IPV6_SADDR_SCORE_HOA;
989 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
994 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
998 if (hiscore.rule < 4)
1002 /* Rule 5: Prefer outgoing interface */
1003 if (hiscore.rule < 5) {
1004 if (daddr_dev == NULL ||
1005 daddr_dev == ifa_result->idev->dev)
1006 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1009 if (daddr_dev == NULL ||
1010 daddr_dev == ifa->idev->dev) {
1011 score.attrs |= IPV6_SADDR_SCORE_OIF;
1012 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1017 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1021 /* Rule 6: Prefer matching label */
1022 if (hiscore.rule < 6) {
1023 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1024 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1027 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1028 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1029 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1034 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1038 #ifdef CONFIG_IPV6_PRIVACY
1039 /* Rule 7: Prefer public address
1040 * Note: prefer temprary address if use_tempaddr >= 2
1042 if (hiscore.rule < 7) {
1043 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1044 (ifa_result->idev->cnf.use_tempaddr >= 2))
1045 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1048 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1049 (ifa->idev->cnf.use_tempaddr >= 2)) {
1050 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1051 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1056 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1060 if (hiscore.rule < 7)
1063 /* Rule 8: Use longest matching prefix */
1064 if (hiscore.rule < 8) {
1065 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1068 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1069 if (score.matchlen > hiscore.matchlen) {
1074 else if (score.matchlen < hiscore.matchlen)
1078 /* Final Rule: choose first available one */
1082 in6_ifa_put(ifa_result);
1087 read_unlock_bh(&idev->lock);
1090 read_unlock(&dev_base_lock);
1093 return -EADDRNOTAVAIL;
1095 ipv6_addr_copy(saddr, &ifa_result->addr);
1096 in6_ifa_put(ifa_result);
1101 int ipv6_get_saddr(struct dst_entry *dst,
1102 struct in6_addr *daddr, struct in6_addr *saddr)
1104 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1108 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1110 struct inet6_dev *idev;
1111 int err = -EADDRNOTAVAIL;
1114 if ((idev = __in6_dev_get(dev)) != NULL) {
1115 struct inet6_ifaddr *ifp;
1117 read_lock_bh(&idev->lock);
1118 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1119 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1120 ipv6_addr_copy(addr, &ifp->addr);
1125 read_unlock_bh(&idev->lock);
1131 static int ipv6_count_addresses(struct inet6_dev *idev)
1134 struct inet6_ifaddr *ifp;
1136 read_lock_bh(&idev->lock);
1137 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1139 read_unlock_bh(&idev->lock);
1143 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1145 struct inet6_ifaddr * ifp;
1146 u8 hash = ipv6_addr_hash(addr);
1148 read_lock_bh(&addrconf_hash_lock);
1149 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1150 if (ipv6_addr_equal(&ifp->addr, addr) &&
1151 !(ifp->flags&IFA_F_TENTATIVE)) {
1152 if (dev == NULL || ifp->idev->dev == dev ||
1153 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1157 read_unlock_bh(&addrconf_hash_lock);
1162 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1164 struct inet6_ifaddr * ifp;
1165 u8 hash = ipv6_addr_hash(addr);
1167 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1168 if (ipv6_addr_equal(&ifp->addr, addr)) {
1169 if (dev == NULL || ifp->idev->dev == dev)
1176 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1178 struct inet6_ifaddr * ifp;
1179 u8 hash = ipv6_addr_hash(addr);
1181 read_lock_bh(&addrconf_hash_lock);
1182 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1183 if (ipv6_addr_equal(&ifp->addr, addr)) {
1184 if (dev == NULL || ifp->idev->dev == dev ||
1185 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1191 read_unlock_bh(&addrconf_hash_lock);
1196 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1198 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1199 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1200 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1201 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1202 int sk_ipv6only = ipv6_only_sock(sk);
1203 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1204 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1205 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1207 if (!sk2_rcv_saddr && !sk_ipv6only)
1210 if (addr_type2 == IPV6_ADDR_ANY &&
1211 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1214 if (addr_type == IPV6_ADDR_ANY &&
1215 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1218 if (sk2_rcv_saddr6 &&
1219 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1222 if (addr_type == IPV6_ADDR_MAPPED &&
1224 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1230 /* Gets referenced address, destroys ifaddr */
1232 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1234 if (ifp->flags&IFA_F_PERMANENT) {
1235 spin_lock_bh(&ifp->lock);
1236 addrconf_del_timer(ifp);
1237 ifp->flags |= IFA_F_TENTATIVE;
1238 spin_unlock_bh(&ifp->lock);
1240 #ifdef CONFIG_IPV6_PRIVACY
1241 } else if (ifp->flags&IFA_F_TEMPORARY) {
1242 struct inet6_ifaddr *ifpub;
1243 spin_lock_bh(&ifp->lock);
1246 in6_ifa_hold(ifpub);
1247 spin_unlock_bh(&ifp->lock);
1248 ipv6_create_tempaddr(ifpub, ifp);
1251 spin_unlock_bh(&ifp->lock);
1259 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1261 if (net_ratelimit())
1262 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1263 addrconf_dad_stop(ifp);
1266 /* Join to solicited addr multicast group. */
1268 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1270 struct in6_addr maddr;
1272 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1275 addrconf_addr_solict_mult(addr, &maddr);
1276 ipv6_dev_mc_inc(dev, &maddr);
1279 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1281 struct in6_addr maddr;
1283 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1286 addrconf_addr_solict_mult(addr, &maddr);
1287 __ipv6_dev_mc_dec(idev, &maddr);
1290 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1292 struct in6_addr addr;
1293 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1294 if (ipv6_addr_any(&addr))
1296 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1299 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1301 struct in6_addr addr;
1302 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1303 if (ipv6_addr_any(&addr))
1305 __ipv6_dev_ac_dec(ifp->idev, &addr);
1308 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1310 if (dev->addr_len != ETH_ALEN)
1312 memcpy(eui, dev->dev_addr, 3);
1313 memcpy(eui + 5, dev->dev_addr + 3, 3);
1316 * The zSeries OSA network cards can be shared among various
1317 * OS instances, but the OSA cards have only one MAC address.
1318 * This leads to duplicate address conflicts in conjunction
1319 * with IPv6 if more than one instance uses the same card.
1321 * The driver for these cards can deliver a unique 16-bit
1322 * identifier for each instance sharing the same card. It is
1323 * placed instead of 0xFFFE in the interface identifier. The
1324 * "u" bit of the interface identifier is not inverted in this
1325 * case. Hence the resulting interface identifier has local
1326 * scope according to RFC2373.
1329 eui[3] = (dev->dev_id >> 8) & 0xFF;
1330 eui[4] = dev->dev_id & 0xFF;
1339 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1341 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1342 if (dev->addr_len != ARCNET_ALEN)
1345 eui[7] = *(u8*)dev->dev_addr;
1349 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1351 if (dev->addr_len != INFINIBAND_ALEN)
1353 memcpy(eui, dev->dev_addr + 12, 8);
1358 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1360 switch (dev->type) {
1363 case ARPHRD_IEEE802_TR:
1364 return addrconf_ifid_eui48(eui, dev);
1366 return addrconf_ifid_arcnet(eui, dev);
1367 case ARPHRD_INFINIBAND:
1368 return addrconf_ifid_infiniband(eui, dev);
1373 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1376 struct inet6_ifaddr *ifp;
1378 read_lock_bh(&idev->lock);
1379 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1380 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1381 memcpy(eui, ifp->addr.s6_addr+8, 8);
1386 read_unlock_bh(&idev->lock);
1390 #ifdef CONFIG_IPV6_PRIVACY
1391 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1392 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1395 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1396 idev->rndid[0] &= ~0x02;
1399 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1400 * check if generated address is not inappropriate
1402 * - Reserved subnet anycast (RFC 2526)
1403 * 11111101 11....11 1xxxxxxx
1404 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1405 * 00-00-5E-FE-xx-xx-xx-xx
1407 * - XXX: already assigned to an address on the device
1409 if (idev->rndid[0] == 0xfd &&
1410 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1411 (idev->rndid[7]&0x80))
1413 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1414 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1416 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1423 static void ipv6_regen_rndid(unsigned long data)
1425 struct inet6_dev *idev = (struct inet6_dev *) data;
1426 unsigned long expires;
1429 write_lock_bh(&idev->lock);
1434 if (__ipv6_regen_rndid(idev) < 0)
1438 idev->cnf.temp_prefered_lft * HZ -
1439 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1440 if (time_before(expires, jiffies)) {
1442 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1447 if (!mod_timer(&idev->regen_timer, expires))
1451 write_unlock_bh(&idev->lock);
1452 rcu_read_unlock_bh();
1456 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1459 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1460 ret = __ipv6_regen_rndid(idev);
1470 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1471 unsigned long expires, u32 flags)
1473 struct fib6_config cfg = {
1474 .fc_table = RT6_TABLE_PREFIX,
1475 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1476 .fc_ifindex = dev->ifindex,
1477 .fc_expires = expires,
1479 .fc_flags = RTF_UP | flags,
1482 ipv6_addr_copy(&cfg.fc_dst, pfx);
1484 /* Prevent useless cloning on PtP SIT.
1485 This thing is done here expecting that the whole
1486 class of non-broadcast devices need not cloning.
1488 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1489 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1490 cfg.fc_flags |= RTF_NONEXTHOP;
1493 ip6_route_add(&cfg);
1496 /* Create "default" multicast route to the interface */
1498 static void addrconf_add_mroute(struct net_device *dev)
1500 struct fib6_config cfg = {
1501 .fc_table = RT6_TABLE_LOCAL,
1502 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1503 .fc_ifindex = dev->ifindex,
1508 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1510 ip6_route_add(&cfg);
1513 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1514 static void sit_route_add(struct net_device *dev)
1516 struct fib6_config cfg = {
1517 .fc_table = RT6_TABLE_MAIN,
1518 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1519 .fc_ifindex = dev->ifindex,
1521 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1524 /* prefix length - 96 bits "::d.d.d.d" */
1525 ip6_route_add(&cfg);
1529 static void addrconf_add_lroute(struct net_device *dev)
1531 struct in6_addr addr;
1533 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1534 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1537 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1539 struct inet6_dev *idev;
1543 if ((idev = ipv6_find_idev(dev)) == NULL)
1546 /* Add default multicast route */
1547 addrconf_add_mroute(dev);
1549 /* Add link local route */
1550 addrconf_add_lroute(dev);
1554 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1556 struct prefix_info *pinfo;
1560 unsigned long rt_expires;
1561 struct inet6_dev *in6_dev;
1563 pinfo = (struct prefix_info *) opt;
1565 if (len < sizeof(struct prefix_info)) {
1566 ADBG(("addrconf: prefix option too short\n"));
1571 * Validation checks ([ADDRCONF], page 19)
1574 addr_type = ipv6_addr_type(&pinfo->prefix);
1576 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1579 valid_lft = ntohl(pinfo->valid);
1580 prefered_lft = ntohl(pinfo->prefered);
1582 if (prefered_lft > valid_lft) {
1583 if (net_ratelimit())
1584 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1588 in6_dev = in6_dev_get(dev);
1590 if (in6_dev == NULL) {
1591 if (net_ratelimit())
1592 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1597 * Two things going on here:
1598 * 1) Add routes for on-link prefixes
1599 * 2) Configure prefixes with the auto flag set
1602 /* Avoid arithmetic overflow. Really, we could
1603 save rt_expires in seconds, likely valid_lft,
1604 but it would require division in fib gc, that it
1607 if (valid_lft >= 0x7FFFFFFF/HZ)
1608 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1610 rt_expires = valid_lft * HZ;
1613 * We convert this (in jiffies) to clock_t later.
1614 * Avoid arithmetic overflow there as well.
1615 * Overflow can happen only if HZ < USER_HZ.
1617 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1618 rt_expires = 0x7FFFFFFF / USER_HZ;
1620 if (pinfo->onlink) {
1621 struct rt6_info *rt;
1622 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1624 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1625 if (rt->rt6i_flags&RTF_EXPIRES) {
1626 if (valid_lft == 0) {
1630 rt->rt6i_expires = jiffies + rt_expires;
1633 } else if (valid_lft) {
1634 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1635 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1638 dst_release(&rt->u.dst);
1641 /* Try to figure out our local address for this prefix */
1643 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1644 struct inet6_ifaddr * ifp;
1645 struct in6_addr addr;
1646 int create = 0, update_lft = 0;
1648 if (pinfo->prefix_len == 64) {
1649 memcpy(&addr, &pinfo->prefix, 8);
1650 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1651 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1652 in6_dev_put(in6_dev);
1657 if (net_ratelimit())
1658 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1660 in6_dev_put(in6_dev);
1665 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1667 if (ifp == NULL && valid_lft) {
1668 int max_addresses = in6_dev->cnf.max_addresses;
1670 /* Do not allow to create too much of autoconfigured
1671 * addresses; this would be too easy way to crash kernel.
1673 if (!max_addresses ||
1674 ipv6_count_addresses(in6_dev) < max_addresses)
1675 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1676 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1678 if (!ifp || IS_ERR(ifp)) {
1679 in6_dev_put(in6_dev);
1683 update_lft = create = 1;
1684 ifp->cstamp = jiffies;
1685 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1691 #ifdef CONFIG_IPV6_PRIVACY
1692 struct inet6_ifaddr *ift;
1696 /* update lifetime (RFC2462 5.5.3 e) */
1697 spin_lock(&ifp->lock);
1699 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1700 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1703 if (!update_lft && stored_lft) {
1704 if (valid_lft > MIN_VALID_LIFETIME ||
1705 valid_lft > stored_lft)
1707 else if (stored_lft <= MIN_VALID_LIFETIME) {
1708 /* valid_lft <= stored_lft is always true */
1712 valid_lft = MIN_VALID_LIFETIME;
1713 if (valid_lft < prefered_lft)
1714 prefered_lft = valid_lft;
1720 ifp->valid_lft = valid_lft;
1721 ifp->prefered_lft = prefered_lft;
1724 ifp->flags &= ~IFA_F_DEPRECATED;
1725 spin_unlock(&ifp->lock);
1727 if (!(flags&IFA_F_TENTATIVE))
1728 ipv6_ifa_notify(0, ifp);
1730 spin_unlock(&ifp->lock);
1732 #ifdef CONFIG_IPV6_PRIVACY
1733 read_lock_bh(&in6_dev->lock);
1734 /* update all temporary addresses in the list */
1735 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1737 * When adjusting the lifetimes of an existing
1738 * temporary address, only lower the lifetimes.
1739 * Implementations must not increase the
1740 * lifetimes of an existing temporary address
1741 * when processing a Prefix Information Option.
1743 spin_lock(&ift->lock);
1745 if (ift->valid_lft > valid_lft &&
1746 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1747 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1748 if (ift->prefered_lft > prefered_lft &&
1749 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1750 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1751 spin_unlock(&ift->lock);
1752 if (!(flags&IFA_F_TENTATIVE))
1753 ipv6_ifa_notify(0, ift);
1756 if (create && in6_dev->cnf.use_tempaddr > 0) {
1758 * When a new public address is created as described in [ADDRCONF],
1759 * also create a new temporary address.
1761 read_unlock_bh(&in6_dev->lock);
1762 ipv6_create_tempaddr(ifp, NULL);
1764 read_unlock_bh(&in6_dev->lock);
1771 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1772 in6_dev_put(in6_dev);
1776 * Set destination address.
1777 * Special case for SIT interfaces where we create a new "virtual"
1780 int addrconf_set_dstaddr(void __user *arg)
1782 struct in6_ifreq ireq;
1783 struct net_device *dev;
1789 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1792 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1798 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1799 if (dev->type == ARPHRD_SIT) {
1802 struct ip_tunnel_parm p;
1804 err = -EADDRNOTAVAIL;
1805 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1808 memset(&p, 0, sizeof(p));
1809 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1813 p.iph.protocol = IPPROTO_IPV6;
1815 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1817 oldfs = get_fs(); set_fs(KERNEL_DS);
1818 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1823 if ((dev = __dev_get_by_name(p.name)) == NULL)
1825 err = dev_open(dev);
1836 * Manual configuration of address on an interface
1838 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1839 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1841 struct inet6_ifaddr *ifp;
1842 struct inet6_dev *idev;
1843 struct net_device *dev;
1845 u32 flags = RTF_EXPIRES;
1849 /* check the lifetime */
1850 if (!valid_lft || prefered_lft > valid_lft)
1853 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1856 if ((idev = addrconf_add_dev(dev)) == NULL)
1859 scope = ipv6_addr_scope(pfx);
1861 if (valid_lft == INFINITY_LIFE_TIME) {
1862 ifa_flags |= IFA_F_PERMANENT;
1864 } else if (valid_lft >= 0x7FFFFFFF/HZ)
1865 valid_lft = 0x7FFFFFFF/HZ;
1867 if (prefered_lft == 0)
1868 ifa_flags |= IFA_F_DEPRECATED;
1869 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1870 (prefered_lft != INFINITY_LIFE_TIME))
1871 prefered_lft = 0x7FFFFFFF/HZ;
1873 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1876 spin_lock_bh(&ifp->lock);
1877 ifp->valid_lft = valid_lft;
1878 ifp->prefered_lft = prefered_lft;
1879 ifp->tstamp = jiffies;
1880 spin_unlock_bh(&ifp->lock);
1882 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1883 jiffies_to_clock_t(valid_lft * HZ), flags);
1884 addrconf_dad_start(ifp, 0);
1890 return PTR_ERR(ifp);
1893 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1895 struct inet6_ifaddr *ifp;
1896 struct inet6_dev *idev;
1897 struct net_device *dev;
1899 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1902 if ((idev = __in6_dev_get(dev)) == NULL)
1905 read_lock_bh(&idev->lock);
1906 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1907 if (ifp->prefix_len == plen &&
1908 ipv6_addr_equal(pfx, &ifp->addr)) {
1910 read_unlock_bh(&idev->lock);
1914 /* If the last address is deleted administratively,
1915 disable IPv6 on this interface.
1917 if (idev->addr_list == NULL)
1918 addrconf_ifdown(idev->dev, 1);
1922 read_unlock_bh(&idev->lock);
1923 return -EADDRNOTAVAIL;
1927 int addrconf_add_ifaddr(void __user *arg)
1929 struct in6_ifreq ireq;
1932 if (!capable(CAP_NET_ADMIN))
1935 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1939 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
1940 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1945 int addrconf_del_ifaddr(void __user *arg)
1947 struct in6_ifreq ireq;
1950 if (!capable(CAP_NET_ADMIN))
1953 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1957 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1962 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1963 static void sit_add_v4_addrs(struct inet6_dev *idev)
1965 struct inet6_ifaddr * ifp;
1966 struct in6_addr addr;
1967 struct net_device *dev;
1972 memset(&addr, 0, sizeof(struct in6_addr));
1973 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1975 if (idev->dev->flags&IFF_POINTOPOINT) {
1976 addr.s6_addr32[0] = htonl(0xfe800000);
1979 scope = IPV6_ADDR_COMPATv4;
1982 if (addr.s6_addr32[3]) {
1983 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1985 spin_lock_bh(&ifp->lock);
1986 ifp->flags &= ~IFA_F_TENTATIVE;
1987 spin_unlock_bh(&ifp->lock);
1988 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1994 for (dev = dev_base; dev != NULL; dev = dev->next) {
1995 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1996 if (in_dev && (dev->flags & IFF_UP)) {
1997 struct in_ifaddr * ifa;
2001 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2004 addr.s6_addr32[3] = ifa->ifa_local;
2006 if (ifa->ifa_scope == RT_SCOPE_LINK)
2008 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2009 if (idev->dev->flags&IFF_POINTOPOINT)
2013 if (idev->dev->flags&IFF_POINTOPOINT)
2018 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2021 spin_lock_bh(&ifp->lock);
2022 ifp->flags &= ~IFA_F_TENTATIVE;
2023 spin_unlock_bh(&ifp->lock);
2024 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2033 static void init_loopback(struct net_device *dev)
2035 struct inet6_dev *idev;
2036 struct inet6_ifaddr * ifp;
2042 if ((idev = ipv6_find_idev(dev)) == NULL) {
2043 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2047 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2049 spin_lock_bh(&ifp->lock);
2050 ifp->flags &= ~IFA_F_TENTATIVE;
2051 spin_unlock_bh(&ifp->lock);
2052 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2057 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2059 struct inet6_ifaddr * ifp;
2061 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2063 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2064 addrconf_dad_start(ifp, 0);
2069 static void addrconf_dev_config(struct net_device *dev)
2071 struct in6_addr addr;
2072 struct inet6_dev * idev;
2076 if ((dev->type != ARPHRD_ETHER) &&
2077 (dev->type != ARPHRD_FDDI) &&
2078 (dev->type != ARPHRD_IEEE802_TR) &&
2079 (dev->type != ARPHRD_ARCNET) &&
2080 (dev->type != ARPHRD_INFINIBAND)) {
2081 /* Alas, we support only Ethernet autoconfiguration. */
2085 idev = addrconf_add_dev(dev);
2089 memset(&addr, 0, sizeof(struct in6_addr));
2090 addr.s6_addr32[0] = htonl(0xFE800000);
2092 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2093 addrconf_add_linklocal(idev, &addr);
2096 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2097 static void addrconf_sit_config(struct net_device *dev)
2099 struct inet6_dev *idev;
2104 * Configure the tunnel with one of our IPv4
2105 * addresses... we should configure all of
2106 * our v4 addrs in the tunnel
2109 if ((idev = ipv6_find_idev(dev)) == NULL) {
2110 printk(KERN_DEBUG "init sit: add_dev failed\n");
2114 sit_add_v4_addrs(idev);
2116 if (dev->flags&IFF_POINTOPOINT) {
2117 addrconf_add_mroute(dev);
2118 addrconf_add_lroute(dev);
2125 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2127 struct in6_addr lladdr;
2129 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2130 addrconf_add_linklocal(idev, &lladdr);
2136 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2138 struct net_device *link_dev;
2140 /* first try to inherit the link-local address from the link device */
2141 if (idev->dev->iflink &&
2142 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2143 if (!ipv6_inherit_linklocal(idev, link_dev))
2146 /* then try to inherit it from any device */
2147 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2148 if (!ipv6_inherit_linklocal(idev, link_dev))
2151 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2155 * Autoconfigure tunnel with a link-local address so routing protocols,
2156 * DHCPv6, MLD etc. can be run over the virtual link
2159 static void addrconf_ip6_tnl_config(struct net_device *dev)
2161 struct inet6_dev *idev;
2165 if ((idev = addrconf_add_dev(dev)) == NULL) {
2166 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2169 ip6_tnl_add_linklocal(idev);
2172 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2175 struct net_device *dev = (struct net_device *) data;
2176 struct inet6_dev *idev = __in6_dev_get(dev);
2177 int run_pending = 0;
2180 case NETDEV_REGISTER:
2182 idev = ipv6_add_dev(dev);
2184 printk(KERN_WARNING "IPv6: add_dev failed for %s\n",
2190 if (event == NETDEV_UP) {
2191 if (!netif_carrier_ok(dev)) {
2192 /* device is not ready yet. */
2194 "ADDRCONF(NETDEV_UP): %s: "
2195 "link is not ready\n",
2201 idev->if_flags |= IF_READY;
2203 if (!netif_carrier_ok(dev)) {
2204 /* device is still not ready. */
2209 if (idev->if_flags & IF_READY) {
2210 /* device is already configured. */
2213 idev->if_flags |= IF_READY;
2217 "ADDRCONF(NETDEV_CHANGE): %s: "
2218 "link becomes ready\n",
2225 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2227 addrconf_sit_config(dev);
2230 case ARPHRD_TUNNEL6:
2231 addrconf_ip6_tnl_config(dev);
2233 case ARPHRD_LOOPBACK:
2238 addrconf_dev_config(dev);
2243 addrconf_dad_run(idev);
2245 /* If the MTU changed during the interface down, when the
2246 interface up, the changed MTU must be reflected in the
2247 idev as well as routers.
2249 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2250 rt6_mtu_change(dev, dev->mtu);
2251 idev->cnf.mtu6 = dev->mtu;
2253 idev->tstamp = jiffies;
2254 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2255 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2256 stop IPv6 on this interface.
2258 if (dev->mtu < IPV6_MIN_MTU)
2259 addrconf_ifdown(dev, event != NETDEV_DOWN);
2263 case NETDEV_CHANGEMTU:
2264 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2265 rt6_mtu_change(dev, dev->mtu);
2266 idev->cnf.mtu6 = dev->mtu;
2270 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2273 case NETDEV_UNREGISTER:
2275 * Remove all addresses from this interface.
2277 addrconf_ifdown(dev, event != NETDEV_DOWN);
2280 case NETDEV_CHANGENAME:
2281 #ifdef CONFIG_SYSCTL
2283 addrconf_sysctl_unregister(&idev->cnf);
2284 neigh_sysctl_unregister(idev->nd_parms);
2285 neigh_sysctl_register(dev, idev->nd_parms,
2286 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2287 &ndisc_ifinfo_sysctl_change,
2289 addrconf_sysctl_register(idev, &idev->cnf);
2299 * addrconf module should be notified of a device going up
2301 static struct notifier_block ipv6_dev_notf = {
2302 .notifier_call = addrconf_notify,
2306 static int addrconf_ifdown(struct net_device *dev, int how)
2308 struct inet6_dev *idev;
2309 struct inet6_ifaddr *ifa, **bifa;
2314 if (dev == &loopback_dev && how == 1)
2318 neigh_ifdown(&nd_tbl, dev);
2320 idev = __in6_dev_get(dev);
2324 /* Step 1: remove reference to ipv6 device from parent device.
2330 /* protected by rtnl_lock */
2331 rcu_assign_pointer(dev->ip6_ptr, NULL);
2333 /* Step 1.5: remove snmp6 entry */
2334 snmp6_unregister_dev(idev);
2338 /* Step 2: clear hash table */
2339 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2340 bifa = &inet6_addr_lst[i];
2342 write_lock_bh(&addrconf_hash_lock);
2343 while ((ifa = *bifa) != NULL) {
2344 if (ifa->idev == idev) {
2345 *bifa = ifa->lst_next;
2346 ifa->lst_next = NULL;
2347 addrconf_del_timer(ifa);
2351 bifa = &ifa->lst_next;
2353 write_unlock_bh(&addrconf_hash_lock);
2356 write_lock_bh(&idev->lock);
2358 /* Step 3: clear flags for stateless addrconf */
2360 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2362 /* Step 4: clear address list */
2363 #ifdef CONFIG_IPV6_PRIVACY
2364 if (how == 1 && del_timer(&idev->regen_timer))
2367 /* clear tempaddr list */
2368 while ((ifa = idev->tempaddr_list) != NULL) {
2369 idev->tempaddr_list = ifa->tmp_next;
2370 ifa->tmp_next = NULL;
2372 write_unlock_bh(&idev->lock);
2373 spin_lock_bh(&ifa->lock);
2376 in6_ifa_put(ifa->ifpub);
2379 spin_unlock_bh(&ifa->lock);
2381 write_lock_bh(&idev->lock);
2384 while ((ifa = idev->addr_list) != NULL) {
2385 idev->addr_list = ifa->if_next;
2386 ifa->if_next = NULL;
2388 addrconf_del_timer(ifa);
2389 write_unlock_bh(&idev->lock);
2391 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2394 write_lock_bh(&idev->lock);
2396 write_unlock_bh(&idev->lock);
2398 /* Step 5: Discard multicast list */
2401 ipv6_mc_destroy_dev(idev);
2405 /* Step 5: netlink notification of this interface */
2406 idev->tstamp = jiffies;
2407 inet6_ifinfo_notify(RTM_DELLINK, idev);
2409 /* Shot the device (if unregistered) */
2412 #ifdef CONFIG_SYSCTL
2413 addrconf_sysctl_unregister(&idev->cnf);
2414 neigh_sysctl_unregister(idev->nd_parms);
2416 neigh_parms_release(&nd_tbl, idev->nd_parms);
2417 neigh_ifdown(&nd_tbl, dev);
2423 static void addrconf_rs_timer(unsigned long data)
2425 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2427 if (ifp->idev->cnf.forwarding)
2430 if (ifp->idev->if_flags & IF_RA_RCVD) {
2432 * Announcement received after solicitation
2438 spin_lock(&ifp->lock);
2439 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2440 struct in6_addr all_routers;
2442 /* The wait after the last probe can be shorter */
2443 addrconf_mod_timer(ifp, AC_RS,
2444 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2445 ifp->idev->cnf.rtr_solicit_delay :
2446 ifp->idev->cnf.rtr_solicit_interval);
2447 spin_unlock(&ifp->lock);
2449 ipv6_addr_all_routers(&all_routers);
2451 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2453 spin_unlock(&ifp->lock);
2455 * Note: we do not support deprecated "all on-link"
2456 * assumption any longer.
2458 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2459 ifp->idev->dev->name);
2467 * Duplicate Address Detection
2469 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2471 unsigned long rand_num;
2472 struct inet6_dev *idev = ifp->idev;
2474 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2475 ifp->probes = idev->cnf.dad_transmits;
2476 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2479 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2481 struct inet6_dev *idev = ifp->idev;
2482 struct net_device *dev = idev->dev;
2484 addrconf_join_solict(dev, &ifp->addr);
2486 net_srandom(ifp->addr.s6_addr32[3]);
2488 read_lock_bh(&idev->lock);
2491 spin_lock_bh(&ifp->lock);
2493 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2494 !(ifp->flags&IFA_F_TENTATIVE) ||
2495 ifp->flags & IFA_F_NODAD) {
2496 ifp->flags &= ~IFA_F_TENTATIVE;
2497 spin_unlock_bh(&ifp->lock);
2498 read_unlock_bh(&idev->lock);
2500 addrconf_dad_completed(ifp);
2504 if (!(idev->if_flags & IF_READY)) {
2505 spin_unlock_bh(&ifp->lock);
2506 read_unlock_bh(&idev->lock);
2508 * If the defice is not ready:
2509 * - keep it tentative if it is a permanent address.
2510 * - otherwise, kill it.
2513 addrconf_dad_stop(ifp);
2516 addrconf_dad_kick(ifp);
2517 spin_unlock_bh(&ifp->lock);
2519 read_unlock_bh(&idev->lock);
2522 static void addrconf_dad_timer(unsigned long data)
2524 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2525 struct inet6_dev *idev = ifp->idev;
2526 struct in6_addr unspec;
2527 struct in6_addr mcaddr;
2529 read_lock_bh(&idev->lock);
2531 read_unlock_bh(&idev->lock);
2534 spin_lock_bh(&ifp->lock);
2535 if (ifp->probes == 0) {
2537 * DAD was successful
2540 ifp->flags &= ~IFA_F_TENTATIVE;
2541 spin_unlock_bh(&ifp->lock);
2542 read_unlock_bh(&idev->lock);
2544 addrconf_dad_completed(ifp);
2550 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2551 spin_unlock_bh(&ifp->lock);
2552 read_unlock_bh(&idev->lock);
2554 /* send a neighbour solicitation for our addr */
2555 memset(&unspec, 0, sizeof(unspec));
2556 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2557 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2562 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2564 struct net_device * dev = ifp->idev->dev;
2567 * Configure the address for reception. Now it is valid.
2570 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2572 /* If added prefix is link local and forwarding is off,
2573 start sending router solicitations.
2576 if (ifp->idev->cnf.forwarding == 0 &&
2577 ifp->idev->cnf.rtr_solicits > 0 &&
2578 (dev->flags&IFF_LOOPBACK) == 0 &&
2579 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2580 struct in6_addr all_routers;
2582 ipv6_addr_all_routers(&all_routers);
2585 * If a host as already performed a random delay
2586 * [...] as part of DAD [...] there is no need
2587 * to delay again before sending the first RS
2589 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2591 spin_lock_bh(&ifp->lock);
2593 ifp->idev->if_flags |= IF_RS_SENT;
2594 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2595 spin_unlock_bh(&ifp->lock);
2599 static void addrconf_dad_run(struct inet6_dev *idev) {
2600 struct inet6_ifaddr *ifp;
2602 read_lock_bh(&idev->lock);
2603 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2604 spin_lock_bh(&ifp->lock);
2605 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2606 spin_unlock_bh(&ifp->lock);
2609 spin_unlock_bh(&ifp->lock);
2610 addrconf_dad_kick(ifp);
2612 read_unlock_bh(&idev->lock);
2615 #ifdef CONFIG_PROC_FS
2616 struct if6_iter_state {
2620 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2622 struct inet6_ifaddr *ifa = NULL;
2623 struct if6_iter_state *state = seq->private;
2625 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2626 ifa = inet6_addr_lst[state->bucket];
2633 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2635 struct if6_iter_state *state = seq->private;
2637 ifa = ifa->lst_next;
2639 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2640 ifa = inet6_addr_lst[state->bucket];
2646 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2648 struct inet6_ifaddr *ifa = if6_get_first(seq);
2651 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2653 return pos ? NULL : ifa;
2656 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2658 read_lock_bh(&addrconf_hash_lock);
2659 return if6_get_idx(seq, *pos);
2662 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2664 struct inet6_ifaddr *ifa;
2666 ifa = if6_get_next(seq, v);
2671 static void if6_seq_stop(struct seq_file *seq, void *v)
2673 read_unlock_bh(&addrconf_hash_lock);
2676 static int if6_seq_show(struct seq_file *seq, void *v)
2678 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2680 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2682 ifp->idev->dev->ifindex,
2686 ifp->idev->dev->name);
2690 static struct seq_operations if6_seq_ops = {
2691 .start = if6_seq_start,
2692 .next = if6_seq_next,
2693 .show = if6_seq_show,
2694 .stop = if6_seq_stop,
2697 static int if6_seq_open(struct inode *inode, struct file *file)
2699 struct seq_file *seq;
2701 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2706 rc = seq_open(file, &if6_seq_ops);
2710 seq = file->private_data;
2719 static const struct file_operations if6_fops = {
2720 .owner = THIS_MODULE,
2721 .open = if6_seq_open,
2723 .llseek = seq_lseek,
2724 .release = seq_release_private,
2727 int __init if6_proc_init(void)
2729 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2734 void if6_proc_exit(void)
2736 proc_net_remove("if_inet6");
2738 #endif /* CONFIG_PROC_FS */
2740 #ifdef CONFIG_IPV6_MIP6
2741 /* Check if address is a home address configured on any interface. */
2742 int ipv6_chk_home_addr(struct in6_addr *addr)
2745 struct inet6_ifaddr * ifp;
2746 u8 hash = ipv6_addr_hash(addr);
2747 read_lock_bh(&addrconf_hash_lock);
2748 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2749 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2750 (ifp->flags & IFA_F_HOMEADDRESS)) {
2755 read_unlock_bh(&addrconf_hash_lock);
2761 * Periodic address status verification
2764 static void addrconf_verify(unsigned long foo)
2766 struct inet6_ifaddr *ifp;
2767 unsigned long now, next;
2770 spin_lock_bh(&addrconf_verify_lock);
2772 next = now + ADDR_CHECK_FREQUENCY;
2774 del_timer(&addr_chk_timer);
2776 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2779 read_lock(&addrconf_hash_lock);
2780 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2782 #ifdef CONFIG_IPV6_PRIVACY
2783 unsigned long regen_advance;
2786 if (ifp->flags & IFA_F_PERMANENT)
2789 spin_lock(&ifp->lock);
2790 age = (now - ifp->tstamp) / HZ;
2792 #ifdef CONFIG_IPV6_PRIVACY
2793 regen_advance = ifp->idev->cnf.regen_max_retry *
2794 ifp->idev->cnf.dad_transmits *
2795 ifp->idev->nd_parms->retrans_time / HZ;
2798 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2799 age >= ifp->valid_lft) {
2800 spin_unlock(&ifp->lock);
2802 read_unlock(&addrconf_hash_lock);
2805 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2806 spin_unlock(&ifp->lock);
2808 } else if (age >= ifp->prefered_lft) {
2809 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2812 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2814 ifp->flags |= IFA_F_DEPRECATED;
2817 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2818 next = ifp->tstamp + ifp->valid_lft * HZ;
2820 spin_unlock(&ifp->lock);
2824 read_unlock(&addrconf_hash_lock);
2826 ipv6_ifa_notify(0, ifp);
2830 #ifdef CONFIG_IPV6_PRIVACY
2831 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2832 !(ifp->flags&IFA_F_TENTATIVE)) {
2833 if (age >= ifp->prefered_lft - regen_advance) {
2834 struct inet6_ifaddr *ifpub = ifp->ifpub;
2835 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2836 next = ifp->tstamp + ifp->prefered_lft * HZ;
2837 if (!ifp->regen_count && ifpub) {
2840 in6_ifa_hold(ifpub);
2841 spin_unlock(&ifp->lock);
2842 read_unlock(&addrconf_hash_lock);
2843 spin_lock(&ifpub->lock);
2844 ifpub->regen_count = 0;
2845 spin_unlock(&ifpub->lock);
2846 ipv6_create_tempaddr(ifpub, ifp);
2851 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2852 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2853 spin_unlock(&ifp->lock);
2856 /* ifp->prefered_lft <= ifp->valid_lft */
2857 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2858 next = ifp->tstamp + ifp->prefered_lft * HZ;
2859 spin_unlock(&ifp->lock);
2862 read_unlock(&addrconf_hash_lock);
2865 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2866 add_timer(&addr_chk_timer);
2867 spin_unlock_bh(&addrconf_verify_lock);
2870 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2872 struct in6_addr *pfx = NULL;
2875 pfx = nla_data(addr);
2878 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2881 pfx = nla_data(local);
2887 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2888 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2889 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2890 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2894 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2896 struct ifaddrmsg *ifm;
2897 struct nlattr *tb[IFA_MAX+1];
2898 struct in6_addr *pfx;
2901 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2905 ifm = nlmsg_data(nlh);
2906 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2910 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2913 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
2914 u32 prefered_lft, u32 valid_lft)
2916 u32 flags = RTF_EXPIRES;
2918 if (!valid_lft || (prefered_lft > valid_lft))
2921 if (valid_lft == INFINITY_LIFE_TIME) {
2922 ifa_flags |= IFA_F_PERMANENT;
2924 } else if (valid_lft >= 0x7FFFFFFF/HZ)
2925 valid_lft = 0x7FFFFFFF/HZ;
2927 if (prefered_lft == 0)
2928 ifa_flags |= IFA_F_DEPRECATED;
2929 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
2930 (prefered_lft != INFINITY_LIFE_TIME))
2931 prefered_lft = 0x7FFFFFFF/HZ;
2933 spin_lock_bh(&ifp->lock);
2934 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
2935 ifp->tstamp = jiffies;
2936 ifp->valid_lft = valid_lft;
2937 ifp->prefered_lft = prefered_lft;
2939 spin_unlock_bh(&ifp->lock);
2940 if (!(ifp->flags&IFA_F_TENTATIVE))
2941 ipv6_ifa_notify(0, ifp);
2943 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
2944 jiffies_to_clock_t(valid_lft * HZ), flags);
2951 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2953 struct ifaddrmsg *ifm;
2954 struct nlattr *tb[IFA_MAX+1];
2955 struct in6_addr *pfx;
2956 struct inet6_ifaddr *ifa;
2957 struct net_device *dev;
2958 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
2962 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2966 ifm = nlmsg_data(nlh);
2967 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2971 if (tb[IFA_CACHEINFO]) {
2972 struct ifa_cacheinfo *ci;
2974 ci = nla_data(tb[IFA_CACHEINFO]);
2975 valid_lft = ci->ifa_valid;
2976 preferred_lft = ci->ifa_prefered;
2978 preferred_lft = INFINITY_LIFE_TIME;
2979 valid_lft = INFINITY_LIFE_TIME;
2982 dev = __dev_get_by_index(ifm->ifa_index);
2986 /* We ignore other flags so far. */
2987 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
2989 ifa = ipv6_get_ifaddr(pfx, dev, 1);
2992 * It would be best to check for !NLM_F_CREATE here but
2993 * userspace alreay relies on not having to provide this.
2995 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
2996 ifa_flags, preferred_lft, valid_lft);
2999 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3000 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3003 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3010 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3011 u8 scope, int ifindex)
3013 struct ifaddrmsg *ifm;
3015 ifm = nlmsg_data(nlh);
3016 ifm->ifa_family = AF_INET6;
3017 ifm->ifa_prefixlen = prefixlen;
3018 ifm->ifa_flags = flags;
3019 ifm->ifa_scope = scope;
3020 ifm->ifa_index = ifindex;
3023 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3024 unsigned long tstamp, u32 preferred, u32 valid)
3026 struct ifa_cacheinfo ci;
3028 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3029 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3030 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3031 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3032 ci.ifa_prefered = preferred;
3033 ci.ifa_valid = valid;
3035 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3038 static inline int rt_scope(int ifa_scope)
3040 if (ifa_scope & IFA_HOST)
3041 return RT_SCOPE_HOST;
3042 else if (ifa_scope & IFA_LINK)
3043 return RT_SCOPE_LINK;
3044 else if (ifa_scope & IFA_SITE)
3045 return RT_SCOPE_SITE;
3047 return RT_SCOPE_UNIVERSE;
3050 static inline int inet6_ifaddr_msgsize(void)
3052 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3053 + nla_total_size(16) /* IFA_ADDRESS */
3054 + nla_total_size(sizeof(struct ifa_cacheinfo));
3057 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3058 u32 pid, u32 seq, int event, unsigned int flags)
3060 struct nlmsghdr *nlh;
3061 u32 preferred, valid;
3063 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3067 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3068 ifa->idev->dev->ifindex);
3070 if (!(ifa->flags&IFA_F_PERMANENT)) {
3071 preferred = ifa->prefered_lft;
3072 valid = ifa->valid_lft;
3073 if (preferred != INFINITY_LIFE_TIME) {
3074 long tval = (jiffies - ifa->tstamp)/HZ;
3076 if (valid != INFINITY_LIFE_TIME)
3080 preferred = INFINITY_LIFE_TIME;
3081 valid = INFINITY_LIFE_TIME;
3084 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3085 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3086 nlmsg_cancel(skb, nlh);
3090 return nlmsg_end(skb, nlh);
3093 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3094 u32 pid, u32 seq, int event, u16 flags)
3096 struct nlmsghdr *nlh;
3097 u8 scope = RT_SCOPE_UNIVERSE;
3098 int ifindex = ifmca->idev->dev->ifindex;
3100 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3101 scope = RT_SCOPE_SITE;
3103 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3107 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3108 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3109 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3110 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3111 nlmsg_cancel(skb, nlh);
3115 return nlmsg_end(skb, nlh);
3118 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3119 u32 pid, u32 seq, int event, unsigned int flags)
3121 struct nlmsghdr *nlh;
3122 u8 scope = RT_SCOPE_UNIVERSE;
3123 int ifindex = ifaca->aca_idev->dev->ifindex;
3125 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3126 scope = RT_SCOPE_SITE;
3128 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3132 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3133 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3134 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3135 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3136 nlmsg_cancel(skb, nlh);
3140 return nlmsg_end(skb, nlh);
3150 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3151 enum addr_type_t type)
3154 int s_idx, s_ip_idx;
3156 struct net_device *dev;
3157 struct inet6_dev *idev = NULL;
3158 struct inet6_ifaddr *ifa;
3159 struct ifmcaddr6 *ifmca;
3160 struct ifacaddr6 *ifaca;
3162 s_idx = cb->args[0];
3163 s_ip_idx = ip_idx = cb->args[1];
3164 read_lock(&dev_base_lock);
3166 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3172 if ((idev = in6_dev_get(dev)) == NULL)
3174 read_lock_bh(&idev->lock);
3177 /* unicast address incl. temp addr */
3178 for (ifa = idev->addr_list; ifa;
3179 ifa = ifa->if_next, ip_idx++) {
3180 if (ip_idx < s_ip_idx)
3182 if ((err = inet6_fill_ifaddr(skb, ifa,
3183 NETLINK_CB(cb->skb).pid,
3184 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3189 case MULTICAST_ADDR:
3190 /* multicast address */
3191 for (ifmca = idev->mc_list; ifmca;
3192 ifmca = ifmca->next, ip_idx++) {
3193 if (ip_idx < s_ip_idx)
3195 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3196 NETLINK_CB(cb->skb).pid,
3197 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3203 /* anycast address */
3204 for (ifaca = idev->ac_list; ifaca;
3205 ifaca = ifaca->aca_next, ip_idx++) {
3206 if (ip_idx < s_ip_idx)
3208 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3209 NETLINK_CB(cb->skb).pid,
3210 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3218 read_unlock_bh(&idev->lock);
3223 read_unlock_bh(&idev->lock);
3226 read_unlock(&dev_base_lock);
3228 cb->args[1] = ip_idx;
3232 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3234 enum addr_type_t type = UNICAST_ADDR;
3235 return inet6_dump_addr(skb, cb, type);
3238 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3240 enum addr_type_t type = MULTICAST_ADDR;
3241 return inet6_dump_addr(skb, cb, type);
3245 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3247 enum addr_type_t type = ANYCAST_ADDR;
3248 return inet6_dump_addr(skb, cb, type);
3251 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3254 struct ifaddrmsg *ifm;
3255 struct nlattr *tb[IFA_MAX+1];
3256 struct in6_addr *addr = NULL;
3257 struct net_device *dev = NULL;
3258 struct inet6_ifaddr *ifa;
3259 struct sk_buff *skb;
3262 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3266 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3272 ifm = nlmsg_data(nlh);
3274 dev = __dev_get_by_index(ifm->ifa_index);
3276 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3277 err = -EADDRNOTAVAIL;
3281 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3286 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3287 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3289 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3290 WARN_ON(err == -EMSGSIZE);
3294 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3301 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3303 struct sk_buff *skb;
3306 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3310 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3312 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3313 WARN_ON(err == -EMSGSIZE);
3317 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3320 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3323 static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3324 __s32 *array, int bytes)
3326 BUG_ON(bytes < (DEVCONF_MAX * 4));
3328 memset(array, 0, bytes);
3329 array[DEVCONF_FORWARDING] = cnf->forwarding;
3330 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3331 array[DEVCONF_MTU6] = cnf->mtu6;
3332 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3333 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3334 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3335 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3336 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3337 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3338 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3339 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3340 #ifdef CONFIG_IPV6_PRIVACY
3341 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3342 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3343 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3344 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3345 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3347 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3348 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3349 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3350 #ifdef CONFIG_IPV6_ROUTER_PREF
3351 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3352 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3353 #ifdef CONFIG_IPV6_ROUTE_INFO
3354 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3357 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3360 static inline size_t inet6_if_nlmsg_size(void)
3362 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3363 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3364 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3365 + nla_total_size(4) /* IFLA_MTU */
3366 + nla_total_size(4) /* IFLA_LINK */
3367 + nla_total_size( /* IFLA_PROTINFO */
3368 nla_total_size(4) /* IFLA_INET6_FLAGS */
3369 + nla_total_size(sizeof(struct ifla_cacheinfo))
3370 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3374 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3375 u32 pid, u32 seq, int event, unsigned int flags)
3377 struct net_device *dev = idev->dev;
3378 struct nlattr *conf;
3379 struct ifinfomsg *hdr;
3380 struct nlmsghdr *nlh;
3382 struct ifla_cacheinfo ci;
3384 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3388 hdr = nlmsg_data(nlh);
3389 hdr->ifi_family = AF_INET6;
3391 hdr->ifi_type = dev->type;
3392 hdr->ifi_index = dev->ifindex;
3393 hdr->ifi_flags = dev_get_flags(dev);
3394 hdr->ifi_change = 0;
3396 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3399 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3401 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3402 if (dev->ifindex != dev->iflink)
3403 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3405 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3406 if (protoinfo == NULL)
3407 goto nla_put_failure;
3409 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3411 ci.max_reasm_len = IPV6_MAXPLEN;
3412 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3413 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3414 ci.reachable_time = idev->nd_parms->reachable_time;
3415 ci.retrans_time = idev->nd_parms->retrans_time;
3416 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3418 conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3420 goto nla_put_failure;
3421 ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf));
3423 /* XXX - Statistics/MC not implemented */
3425 nla_nest_end(skb, protoinfo);
3426 return nlmsg_end(skb, nlh);
3429 nlmsg_cancel(skb, nlh);
3433 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3436 int s_idx = cb->args[0];
3437 struct net_device *dev;
3438 struct inet6_dev *idev;
3440 read_lock(&dev_base_lock);
3441 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3444 if ((idev = in6_dev_get(dev)) == NULL)
3446 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3447 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3452 read_unlock(&dev_base_lock);
3458 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3460 struct sk_buff *skb;
3463 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3467 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3469 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3470 WARN_ON(err == -EMSGSIZE);
3474 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3477 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3480 static inline size_t inet6_prefix_nlmsg_size(void)
3482 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3483 + nla_total_size(sizeof(struct in6_addr))
3484 + nla_total_size(sizeof(struct prefix_cacheinfo));
3487 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3488 struct prefix_info *pinfo, u32 pid, u32 seq,
3489 int event, unsigned int flags)
3491 struct prefixmsg *pmsg;
3492 struct nlmsghdr *nlh;
3493 struct prefix_cacheinfo ci;
3495 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3499 pmsg = nlmsg_data(nlh);
3500 pmsg->prefix_family = AF_INET6;
3501 pmsg->prefix_pad1 = 0;
3502 pmsg->prefix_pad2 = 0;
3503 pmsg->prefix_ifindex = idev->dev->ifindex;
3504 pmsg->prefix_len = pinfo->prefix_len;
3505 pmsg->prefix_type = pinfo->type;
3506 pmsg->prefix_pad3 = 0;
3507 pmsg->prefix_flags = 0;
3509 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3510 if (pinfo->autoconf)
3511 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3513 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3515 ci.preferred_time = ntohl(pinfo->prefered);
3516 ci.valid_time = ntohl(pinfo->valid);
3517 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3519 return nlmsg_end(skb, nlh);
3522 nlmsg_cancel(skb, nlh);
3526 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3527 struct prefix_info *pinfo)
3529 struct sk_buff *skb;
3532 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3536 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3538 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3539 WARN_ON(err == -EMSGSIZE);
3543 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3546 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3549 static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
3550 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3551 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3552 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3553 [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr,
3554 .dumpit = inet6_dump_ifaddr, },
3555 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3556 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3557 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3558 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3559 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3560 .dumpit = inet6_dump_fib, },
3561 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3562 [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, },
3566 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3568 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3572 ip6_ins_rt(ifp->rt);
3573 if (ifp->idev->cnf.forwarding)
3574 addrconf_join_anycast(ifp);
3577 if (ifp->idev->cnf.forwarding)
3578 addrconf_leave_anycast(ifp);
3579 addrconf_leave_solict(ifp->idev, &ifp->addr);
3580 dst_hold(&ifp->rt->u.dst);
3581 if (ip6_del_rt(ifp->rt))
3582 dst_free(&ifp->rt->u.dst);
3587 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3590 if (likely(ifp->idev->dead == 0))
3591 __ipv6_ifa_notify(event, ifp);
3592 rcu_read_unlock_bh();
3595 #ifdef CONFIG_SYSCTL
3598 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3599 void __user *buffer, size_t *lenp, loff_t *ppos)
3601 int *valp = ctl->data;
3605 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3607 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3608 if (valp != &ipv6_devconf.forwarding) {
3609 if ((!*valp) ^ (!val)) {
3610 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3613 dev_forward_change(idev);
3616 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3617 addrconf_forward_change();
3620 rt6_purge_dflt_routers();
3626 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3627 int __user *name, int nlen,
3628 void __user *oldval,
3629 size_t __user *oldlenp,
3630 void __user *newval, size_t newlen)
3632 int *valp = table->data;
3635 if (!newval || !newlen)
3637 if (newlen != sizeof(int))
3639 if (get_user(new, (int __user *)newval))
3643 if (oldval && oldlenp) {
3645 if (get_user(len, oldlenp))
3648 if (len > table->maxlen)
3649 len = table->maxlen;
3650 if (copy_to_user(oldval, valp, len))
3652 if (put_user(len, oldlenp))
3657 if (valp != &ipv6_devconf_dflt.forwarding) {
3658 if (valp != &ipv6_devconf.forwarding) {
3659 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3661 if (unlikely(idev == NULL))
3663 changed = (!*valp) ^ (!new);
3666 dev_forward_change(idev);
3669 addrconf_forward_change();
3673 rt6_purge_dflt_routers();
3680 static struct addrconf_sysctl_table
3682 struct ctl_table_header *sysctl_header;
3683 ctl_table addrconf_vars[__NET_IPV6_MAX];
3684 ctl_table addrconf_dev[2];
3685 ctl_table addrconf_conf_dir[2];
3686 ctl_table addrconf_proto_dir[2];
3687 ctl_table addrconf_root_dir[2];
3688 } addrconf_sysctl __read_mostly = {
3689 .sysctl_header = NULL,
3692 .ctl_name = NET_IPV6_FORWARDING,
3693 .procname = "forwarding",
3694 .data = &ipv6_devconf.forwarding,
3695 .maxlen = sizeof(int),
3697 .proc_handler = &addrconf_sysctl_forward,
3698 .strategy = &addrconf_sysctl_forward_strategy,
3701 .ctl_name = NET_IPV6_HOP_LIMIT,
3702 .procname = "hop_limit",
3703 .data = &ipv6_devconf.hop_limit,
3704 .maxlen = sizeof(int),
3706 .proc_handler = proc_dointvec,
3709 .ctl_name = NET_IPV6_MTU,
3711 .data = &ipv6_devconf.mtu6,
3712 .maxlen = sizeof(int),
3714 .proc_handler = &proc_dointvec,
3717 .ctl_name = NET_IPV6_ACCEPT_RA,
3718 .procname = "accept_ra",
3719 .data = &ipv6_devconf.accept_ra,
3720 .maxlen = sizeof(int),
3722 .proc_handler = &proc_dointvec,
3725 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3726 .procname = "accept_redirects",
3727 .data = &ipv6_devconf.accept_redirects,
3728 .maxlen = sizeof(int),
3730 .proc_handler = &proc_dointvec,
3733 .ctl_name = NET_IPV6_AUTOCONF,
3734 .procname = "autoconf",
3735 .data = &ipv6_devconf.autoconf,
3736 .maxlen = sizeof(int),
3738 .proc_handler = &proc_dointvec,
3741 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3742 .procname = "dad_transmits",
3743 .data = &ipv6_devconf.dad_transmits,
3744 .maxlen = sizeof(int),
3746 .proc_handler = &proc_dointvec,
3749 .ctl_name = NET_IPV6_RTR_SOLICITS,
3750 .procname = "router_solicitations",
3751 .data = &ipv6_devconf.rtr_solicits,
3752 .maxlen = sizeof(int),
3754 .proc_handler = &proc_dointvec,
3757 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3758 .procname = "router_solicitation_interval",
3759 .data = &ipv6_devconf.rtr_solicit_interval,
3760 .maxlen = sizeof(int),
3762 .proc_handler = &proc_dointvec_jiffies,
3763 .strategy = &sysctl_jiffies,
3766 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3767 .procname = "router_solicitation_delay",
3768 .data = &ipv6_devconf.rtr_solicit_delay,
3769 .maxlen = sizeof(int),
3771 .proc_handler = &proc_dointvec_jiffies,
3772 .strategy = &sysctl_jiffies,
3775 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3776 .procname = "force_mld_version",
3777 .data = &ipv6_devconf.force_mld_version,
3778 .maxlen = sizeof(int),
3780 .proc_handler = &proc_dointvec,
3782 #ifdef CONFIG_IPV6_PRIVACY
3784 .ctl_name = NET_IPV6_USE_TEMPADDR,
3785 .procname = "use_tempaddr",
3786 .data = &ipv6_devconf.use_tempaddr,
3787 .maxlen = sizeof(int),
3789 .proc_handler = &proc_dointvec,
3792 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3793 .procname = "temp_valid_lft",
3794 .data = &ipv6_devconf.temp_valid_lft,
3795 .maxlen = sizeof(int),
3797 .proc_handler = &proc_dointvec,
3800 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3801 .procname = "temp_prefered_lft",
3802 .data = &ipv6_devconf.temp_prefered_lft,
3803 .maxlen = sizeof(int),
3805 .proc_handler = &proc_dointvec,
3808 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3809 .procname = "regen_max_retry",
3810 .data = &ipv6_devconf.regen_max_retry,
3811 .maxlen = sizeof(int),
3813 .proc_handler = &proc_dointvec,
3816 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3817 .procname = "max_desync_factor",
3818 .data = &ipv6_devconf.max_desync_factor,
3819 .maxlen = sizeof(int),
3821 .proc_handler = &proc_dointvec,
3825 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3826 .procname = "max_addresses",
3827 .data = &ipv6_devconf.max_addresses,
3828 .maxlen = sizeof(int),
3830 .proc_handler = &proc_dointvec,
3833 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3834 .procname = "accept_ra_defrtr",
3835 .data = &ipv6_devconf.accept_ra_defrtr,
3836 .maxlen = sizeof(int),
3838 .proc_handler = &proc_dointvec,
3841 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3842 .procname = "accept_ra_pinfo",
3843 .data = &ipv6_devconf.accept_ra_pinfo,
3844 .maxlen = sizeof(int),
3846 .proc_handler = &proc_dointvec,
3848 #ifdef CONFIG_IPV6_ROUTER_PREF
3850 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3851 .procname = "accept_ra_rtr_pref",
3852 .data = &ipv6_devconf.accept_ra_rtr_pref,
3853 .maxlen = sizeof(int),
3855 .proc_handler = &proc_dointvec,
3858 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3859 .procname = "router_probe_interval",
3860 .data = &ipv6_devconf.rtr_probe_interval,
3861 .maxlen = sizeof(int),
3863 .proc_handler = &proc_dointvec_jiffies,
3864 .strategy = &sysctl_jiffies,
3866 #ifdef CONFIG_IPV6_ROUTE_INFO
3868 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3869 .procname = "accept_ra_rt_info_max_plen",
3870 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3871 .maxlen = sizeof(int),
3873 .proc_handler = &proc_dointvec,
3878 .ctl_name = NET_IPV6_PROXY_NDP,
3879 .procname = "proxy_ndp",
3880 .data = &ipv6_devconf.proxy_ndp,
3881 .maxlen = sizeof(int),
3883 .proc_handler = &proc_dointvec,
3886 .ctl_name = 0, /* sentinel */
3891 .ctl_name = NET_PROTO_CONF_ALL,
3894 .child = addrconf_sysctl.addrconf_vars,
3897 .ctl_name = 0, /* sentinel */
3900 .addrconf_conf_dir = {
3902 .ctl_name = NET_IPV6_CONF,
3905 .child = addrconf_sysctl.addrconf_dev,
3908 .ctl_name = 0, /* sentinel */
3911 .addrconf_proto_dir = {
3913 .ctl_name = NET_IPV6,
3916 .child = addrconf_sysctl.addrconf_conf_dir,
3919 .ctl_name = 0, /* sentinel */
3922 .addrconf_root_dir = {
3924 .ctl_name = CTL_NET,
3927 .child = addrconf_sysctl.addrconf_proto_dir,
3930 .ctl_name = 0, /* sentinel */
3935 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3938 struct net_device *dev = idev ? idev->dev : NULL;
3939 struct addrconf_sysctl_table *t;
3940 char *dev_name = NULL;
3942 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
3945 for (i=0; t->addrconf_vars[i].data; i++) {
3946 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3947 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3950 dev_name = dev->name;
3951 t->addrconf_dev[0].ctl_name = dev->ifindex;
3953 dev_name = "default";
3954 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3958 * Make a copy of dev_name, because '.procname' is regarded as const
3959 * by sysctl and we wouldn't want anyone to change it under our feet
3960 * (see SIOCSIFNAME).
3962 dev_name = kstrdup(dev_name, GFP_KERNEL);
3966 t->addrconf_dev[0].procname = dev_name;
3968 t->addrconf_dev[0].child = t->addrconf_vars;
3969 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3970 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3971 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3973 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
3974 if (t->sysctl_header == NULL)
3989 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3992 struct addrconf_sysctl_table *t = p->sysctl;
3994 unregister_sysctl_table(t->sysctl_header);
3995 kfree(t->addrconf_dev[0].procname);
4007 int register_inet6addr_notifier(struct notifier_block *nb)
4009 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4012 int unregister_inet6addr_notifier(struct notifier_block *nb)
4014 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4018 * Init / cleanup code
4021 int __init addrconf_init(void)
4025 /* The addrconf netdev notifier requires that loopback_dev
4026 * has it's ipv6 private information allocated and setup
4027 * before it can bring up and give link-local addresses
4028 * to other devices which are up.
4030 * Unfortunately, loopback_dev is not necessarily the first
4031 * entry in the global dev_base list of net devices. In fact,
4032 * it is likely to be the very last entry on that list.
4033 * So this causes the notifier registry below to try and
4034 * give link-local addresses to all devices besides loopback_dev
4035 * first, then loopback_dev, which cases all the non-loopback_dev
4036 * devices to fail to get a link-local address.
4038 * So, as a temporary fix, allocate the ipv6 structure for
4039 * loopback_dev first by hand.
4040 * Longer term, all of the dependencies ipv6 has upon the loopback
4041 * device and it being up should be removed.
4044 if (!ipv6_add_dev(&loopback_dev))
4050 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4052 register_netdevice_notifier(&ipv6_dev_notf);
4055 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
4056 #ifdef CONFIG_SYSCTL
4057 addrconf_sysctl.sysctl_header =
4058 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
4059 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4065 void __exit addrconf_cleanup(void)
4067 struct net_device *dev;
4068 struct inet6_dev *idev;
4069 struct inet6_ifaddr *ifa;
4072 unregister_netdevice_notifier(&ipv6_dev_notf);
4074 rtnetlink_links[PF_INET6] = NULL;
4075 #ifdef CONFIG_SYSCTL
4076 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4077 addrconf_sysctl_unregister(&ipv6_devconf);
4086 for (dev=dev_base; dev; dev=dev->next) {
4087 if ((idev = __in6_dev_get(dev)) == NULL)
4089 addrconf_ifdown(dev, 1);
4091 addrconf_ifdown(&loopback_dev, 2);
4097 write_lock_bh(&addrconf_hash_lock);
4098 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4099 for (ifa=inet6_addr_lst[i]; ifa; ) {
4100 struct inet6_ifaddr *bifa;
4103 ifa = ifa->lst_next;
4104 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4105 /* Do not free it; something is wrong.
4106 Now we can investigate it with debugger.
4110 write_unlock_bh(&addrconf_hash_lock);
4112 del_timer(&addr_chk_timer);
4116 #ifdef CONFIG_PROC_FS
4117 proc_net_remove("if_inet6");