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;
1848 /* check the lifetime */
1849 if (!valid_lft || prefered_lft > valid_lft)
1852 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1855 if ((idev = addrconf_add_dev(dev)) == NULL)
1858 scope = ipv6_addr_scope(pfx);
1860 if (valid_lft == INFINITY_LIFE_TIME)
1861 ifa_flags |= IFA_F_PERMANENT;
1862 else if (valid_lft >= 0x7FFFFFFF/HZ)
1863 valid_lft = 0x7FFFFFFF/HZ;
1865 if (prefered_lft == 0)
1866 ifa_flags |= IFA_F_DEPRECATED;
1867 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1868 (prefered_lft != INFINITY_LIFE_TIME))
1869 prefered_lft = 0x7FFFFFFF/HZ;
1871 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1874 spin_lock_bh(&ifp->lock);
1875 ifp->valid_lft = valid_lft;
1876 ifp->prefered_lft = prefered_lft;
1877 ifp->tstamp = jiffies;
1878 spin_unlock_bh(&ifp->lock);
1880 addrconf_dad_start(ifp, 0);
1886 return PTR_ERR(ifp);
1889 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1891 struct inet6_ifaddr *ifp;
1892 struct inet6_dev *idev;
1893 struct net_device *dev;
1895 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1898 if ((idev = __in6_dev_get(dev)) == NULL)
1901 read_lock_bh(&idev->lock);
1902 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1903 if (ifp->prefix_len == plen &&
1904 ipv6_addr_equal(pfx, &ifp->addr)) {
1906 read_unlock_bh(&idev->lock);
1910 /* If the last address is deleted administratively,
1911 disable IPv6 on this interface.
1913 if (idev->addr_list == NULL)
1914 addrconf_ifdown(idev->dev, 1);
1918 read_unlock_bh(&idev->lock);
1919 return -EADDRNOTAVAIL;
1923 int addrconf_add_ifaddr(void __user *arg)
1925 struct in6_ifreq ireq;
1928 if (!capable(CAP_NET_ADMIN))
1931 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1935 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
1936 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1941 int addrconf_del_ifaddr(void __user *arg)
1943 struct in6_ifreq ireq;
1946 if (!capable(CAP_NET_ADMIN))
1949 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1953 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1958 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1959 static void sit_add_v4_addrs(struct inet6_dev *idev)
1961 struct inet6_ifaddr * ifp;
1962 struct in6_addr addr;
1963 struct net_device *dev;
1968 memset(&addr, 0, sizeof(struct in6_addr));
1969 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1971 if (idev->dev->flags&IFF_POINTOPOINT) {
1972 addr.s6_addr32[0] = htonl(0xfe800000);
1975 scope = IPV6_ADDR_COMPATv4;
1978 if (addr.s6_addr32[3]) {
1979 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1981 spin_lock_bh(&ifp->lock);
1982 ifp->flags &= ~IFA_F_TENTATIVE;
1983 spin_unlock_bh(&ifp->lock);
1984 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1990 for (dev = dev_base; dev != NULL; dev = dev->next) {
1991 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1992 if (in_dev && (dev->flags & IFF_UP)) {
1993 struct in_ifaddr * ifa;
1997 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2000 addr.s6_addr32[3] = ifa->ifa_local;
2002 if (ifa->ifa_scope == RT_SCOPE_LINK)
2004 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2005 if (idev->dev->flags&IFF_POINTOPOINT)
2009 if (idev->dev->flags&IFF_POINTOPOINT)
2014 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2017 spin_lock_bh(&ifp->lock);
2018 ifp->flags &= ~IFA_F_TENTATIVE;
2019 spin_unlock_bh(&ifp->lock);
2020 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2029 static void init_loopback(struct net_device *dev)
2031 struct inet6_dev *idev;
2032 struct inet6_ifaddr * ifp;
2038 if ((idev = ipv6_find_idev(dev)) == NULL) {
2039 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2043 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2045 spin_lock_bh(&ifp->lock);
2046 ifp->flags &= ~IFA_F_TENTATIVE;
2047 spin_unlock_bh(&ifp->lock);
2048 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2053 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2055 struct inet6_ifaddr * ifp;
2057 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2059 addrconf_dad_start(ifp, 0);
2064 static void addrconf_dev_config(struct net_device *dev)
2066 struct in6_addr addr;
2067 struct inet6_dev * idev;
2071 if ((dev->type != ARPHRD_ETHER) &&
2072 (dev->type != ARPHRD_FDDI) &&
2073 (dev->type != ARPHRD_IEEE802_TR) &&
2074 (dev->type != ARPHRD_ARCNET) &&
2075 (dev->type != ARPHRD_INFINIBAND)) {
2076 /* Alas, we support only Ethernet autoconfiguration. */
2080 idev = addrconf_add_dev(dev);
2084 memset(&addr, 0, sizeof(struct in6_addr));
2085 addr.s6_addr32[0] = htonl(0xFE800000);
2087 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2088 addrconf_add_linklocal(idev, &addr);
2091 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2092 static void addrconf_sit_config(struct net_device *dev)
2094 struct inet6_dev *idev;
2099 * Configure the tunnel with one of our IPv4
2100 * addresses... we should configure all of
2101 * our v4 addrs in the tunnel
2104 if ((idev = ipv6_find_idev(dev)) == NULL) {
2105 printk(KERN_DEBUG "init sit: add_dev failed\n");
2109 sit_add_v4_addrs(idev);
2111 if (dev->flags&IFF_POINTOPOINT) {
2112 addrconf_add_mroute(dev);
2113 addrconf_add_lroute(dev);
2120 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2122 struct in6_addr lladdr;
2124 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2125 addrconf_add_linklocal(idev, &lladdr);
2131 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2133 struct net_device *link_dev;
2135 /* first try to inherit the link-local address from the link device */
2136 if (idev->dev->iflink &&
2137 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2138 if (!ipv6_inherit_linklocal(idev, link_dev))
2141 /* then try to inherit it from any device */
2142 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2143 if (!ipv6_inherit_linklocal(idev, link_dev))
2146 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2150 * Autoconfigure tunnel with a link-local address so routing protocols,
2151 * DHCPv6, MLD etc. can be run over the virtual link
2154 static void addrconf_ip6_tnl_config(struct net_device *dev)
2156 struct inet6_dev *idev;
2160 if ((idev = addrconf_add_dev(dev)) == NULL) {
2161 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2164 ip6_tnl_add_linklocal(idev);
2167 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2170 struct net_device *dev = (struct net_device *) data;
2171 struct inet6_dev *idev = __in6_dev_get(dev);
2172 int run_pending = 0;
2177 if (event == NETDEV_UP) {
2178 if (!netif_carrier_ok(dev)) {
2179 /* device is not ready yet. */
2181 "ADDRCONF(NETDEV_UP): %s: "
2182 "link is not ready\n",
2188 idev->if_flags |= IF_READY;
2190 if (!netif_carrier_ok(dev)) {
2191 /* device is still not ready. */
2196 if (idev->if_flags & IF_READY) {
2197 /* device is already configured. */
2200 idev->if_flags |= IF_READY;
2204 "ADDRCONF(NETDEV_CHANGE): %s: "
2205 "link becomes ready\n",
2212 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2214 addrconf_sit_config(dev);
2217 case ARPHRD_TUNNEL6:
2218 addrconf_ip6_tnl_config(dev);
2220 case ARPHRD_LOOPBACK:
2225 addrconf_dev_config(dev);
2230 addrconf_dad_run(idev);
2232 /* If the MTU changed during the interface down, when the
2233 interface up, the changed MTU must be reflected in the
2234 idev as well as routers.
2236 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2237 rt6_mtu_change(dev, dev->mtu);
2238 idev->cnf.mtu6 = dev->mtu;
2240 idev->tstamp = jiffies;
2241 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2242 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2243 stop IPv6 on this interface.
2245 if (dev->mtu < IPV6_MIN_MTU)
2246 addrconf_ifdown(dev, event != NETDEV_DOWN);
2250 case NETDEV_CHANGEMTU:
2251 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2252 rt6_mtu_change(dev, dev->mtu);
2253 idev->cnf.mtu6 = dev->mtu;
2257 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2260 case NETDEV_UNREGISTER:
2262 * Remove all addresses from this interface.
2264 addrconf_ifdown(dev, event != NETDEV_DOWN);
2267 case NETDEV_CHANGENAME:
2268 #ifdef CONFIG_SYSCTL
2270 addrconf_sysctl_unregister(&idev->cnf);
2271 neigh_sysctl_unregister(idev->nd_parms);
2272 neigh_sysctl_register(dev, idev->nd_parms,
2273 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2274 &ndisc_ifinfo_sysctl_change,
2276 addrconf_sysctl_register(idev, &idev->cnf);
2286 * addrconf module should be notified of a device going up
2288 static struct notifier_block ipv6_dev_notf = {
2289 .notifier_call = addrconf_notify,
2293 static int addrconf_ifdown(struct net_device *dev, int how)
2295 struct inet6_dev *idev;
2296 struct inet6_ifaddr *ifa, **bifa;
2301 if (dev == &loopback_dev && how == 1)
2305 neigh_ifdown(&nd_tbl, dev);
2307 idev = __in6_dev_get(dev);
2311 /* Step 1: remove reference to ipv6 device from parent device.
2317 /* protected by rtnl_lock */
2318 rcu_assign_pointer(dev->ip6_ptr, NULL);
2320 /* Step 1.5: remove snmp6 entry */
2321 snmp6_unregister_dev(idev);
2325 /* Step 2: clear hash table */
2326 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2327 bifa = &inet6_addr_lst[i];
2329 write_lock_bh(&addrconf_hash_lock);
2330 while ((ifa = *bifa) != NULL) {
2331 if (ifa->idev == idev) {
2332 *bifa = ifa->lst_next;
2333 ifa->lst_next = NULL;
2334 addrconf_del_timer(ifa);
2338 bifa = &ifa->lst_next;
2340 write_unlock_bh(&addrconf_hash_lock);
2343 write_lock_bh(&idev->lock);
2345 /* Step 3: clear flags for stateless addrconf */
2347 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2349 /* Step 4: clear address list */
2350 #ifdef CONFIG_IPV6_PRIVACY
2351 if (how == 1 && del_timer(&idev->regen_timer))
2354 /* clear tempaddr list */
2355 while ((ifa = idev->tempaddr_list) != NULL) {
2356 idev->tempaddr_list = ifa->tmp_next;
2357 ifa->tmp_next = NULL;
2359 write_unlock_bh(&idev->lock);
2360 spin_lock_bh(&ifa->lock);
2363 in6_ifa_put(ifa->ifpub);
2366 spin_unlock_bh(&ifa->lock);
2368 write_lock_bh(&idev->lock);
2371 while ((ifa = idev->addr_list) != NULL) {
2372 idev->addr_list = ifa->if_next;
2373 ifa->if_next = NULL;
2375 addrconf_del_timer(ifa);
2376 write_unlock_bh(&idev->lock);
2378 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2381 write_lock_bh(&idev->lock);
2383 write_unlock_bh(&idev->lock);
2385 /* Step 5: Discard multicast list */
2388 ipv6_mc_destroy_dev(idev);
2392 /* Step 5: netlink notification of this interface */
2393 idev->tstamp = jiffies;
2394 inet6_ifinfo_notify(RTM_DELLINK, idev);
2396 /* Shot the device (if unregistered) */
2399 #ifdef CONFIG_SYSCTL
2400 addrconf_sysctl_unregister(&idev->cnf);
2401 neigh_sysctl_unregister(idev->nd_parms);
2403 neigh_parms_release(&nd_tbl, idev->nd_parms);
2404 neigh_ifdown(&nd_tbl, dev);
2410 static void addrconf_rs_timer(unsigned long data)
2412 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2414 if (ifp->idev->cnf.forwarding)
2417 if (ifp->idev->if_flags & IF_RA_RCVD) {
2419 * Announcement received after solicitation
2425 spin_lock(&ifp->lock);
2426 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2427 struct in6_addr all_routers;
2429 /* The wait after the last probe can be shorter */
2430 addrconf_mod_timer(ifp, AC_RS,
2431 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2432 ifp->idev->cnf.rtr_solicit_delay :
2433 ifp->idev->cnf.rtr_solicit_interval);
2434 spin_unlock(&ifp->lock);
2436 ipv6_addr_all_routers(&all_routers);
2438 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2440 spin_unlock(&ifp->lock);
2442 * Note: we do not support deprecated "all on-link"
2443 * assumption any longer.
2445 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2446 ifp->idev->dev->name);
2454 * Duplicate Address Detection
2456 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2458 unsigned long rand_num;
2459 struct inet6_dev *idev = ifp->idev;
2461 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2462 ifp->probes = idev->cnf.dad_transmits;
2463 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2466 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2468 struct inet6_dev *idev = ifp->idev;
2469 struct net_device *dev = idev->dev;
2471 addrconf_join_solict(dev, &ifp->addr);
2473 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2474 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2477 net_srandom(ifp->addr.s6_addr32[3]);
2479 read_lock_bh(&idev->lock);
2482 spin_lock_bh(&ifp->lock);
2484 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2485 !(ifp->flags&IFA_F_TENTATIVE) ||
2486 ifp->flags & IFA_F_NODAD) {
2487 ifp->flags &= ~IFA_F_TENTATIVE;
2488 spin_unlock_bh(&ifp->lock);
2489 read_unlock_bh(&idev->lock);
2491 addrconf_dad_completed(ifp);
2495 if (!(idev->if_flags & IF_READY)) {
2496 spin_unlock_bh(&ifp->lock);
2497 read_unlock_bh(&idev->lock);
2499 * If the defice is not ready:
2500 * - keep it tentative if it is a permanent address.
2501 * - otherwise, kill it.
2504 addrconf_dad_stop(ifp);
2507 addrconf_dad_kick(ifp);
2508 spin_unlock_bh(&ifp->lock);
2510 read_unlock_bh(&idev->lock);
2513 static void addrconf_dad_timer(unsigned long data)
2515 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2516 struct inet6_dev *idev = ifp->idev;
2517 struct in6_addr unspec;
2518 struct in6_addr mcaddr;
2520 read_lock_bh(&idev->lock);
2522 read_unlock_bh(&idev->lock);
2525 spin_lock_bh(&ifp->lock);
2526 if (ifp->probes == 0) {
2528 * DAD was successful
2531 ifp->flags &= ~IFA_F_TENTATIVE;
2532 spin_unlock_bh(&ifp->lock);
2533 read_unlock_bh(&idev->lock);
2535 addrconf_dad_completed(ifp);
2541 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2542 spin_unlock_bh(&ifp->lock);
2543 read_unlock_bh(&idev->lock);
2545 /* send a neighbour solicitation for our addr */
2546 memset(&unspec, 0, sizeof(unspec));
2547 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2548 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2553 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2555 struct net_device * dev = ifp->idev->dev;
2558 * Configure the address for reception. Now it is valid.
2561 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2563 /* If added prefix is link local and forwarding is off,
2564 start sending router solicitations.
2567 if (ifp->idev->cnf.forwarding == 0 &&
2568 ifp->idev->cnf.rtr_solicits > 0 &&
2569 (dev->flags&IFF_LOOPBACK) == 0 &&
2570 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2571 struct in6_addr all_routers;
2573 ipv6_addr_all_routers(&all_routers);
2576 * If a host as already performed a random delay
2577 * [...] as part of DAD [...] there is no need
2578 * to delay again before sending the first RS
2580 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2582 spin_lock_bh(&ifp->lock);
2584 ifp->idev->if_flags |= IF_RS_SENT;
2585 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2586 spin_unlock_bh(&ifp->lock);
2590 static void addrconf_dad_run(struct inet6_dev *idev) {
2591 struct inet6_ifaddr *ifp;
2593 read_lock_bh(&idev->lock);
2594 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2595 spin_lock_bh(&ifp->lock);
2596 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2597 spin_unlock_bh(&ifp->lock);
2600 spin_unlock_bh(&ifp->lock);
2601 addrconf_dad_kick(ifp);
2603 read_unlock_bh(&idev->lock);
2606 #ifdef CONFIG_PROC_FS
2607 struct if6_iter_state {
2611 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2613 struct inet6_ifaddr *ifa = NULL;
2614 struct if6_iter_state *state = seq->private;
2616 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2617 ifa = inet6_addr_lst[state->bucket];
2624 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2626 struct if6_iter_state *state = seq->private;
2628 ifa = ifa->lst_next;
2630 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2631 ifa = inet6_addr_lst[state->bucket];
2637 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2639 struct inet6_ifaddr *ifa = if6_get_first(seq);
2642 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2644 return pos ? NULL : ifa;
2647 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2649 read_lock_bh(&addrconf_hash_lock);
2650 return if6_get_idx(seq, *pos);
2653 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2655 struct inet6_ifaddr *ifa;
2657 ifa = if6_get_next(seq, v);
2662 static void if6_seq_stop(struct seq_file *seq, void *v)
2664 read_unlock_bh(&addrconf_hash_lock);
2667 static int if6_seq_show(struct seq_file *seq, void *v)
2669 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2671 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2673 ifp->idev->dev->ifindex,
2677 ifp->idev->dev->name);
2681 static struct seq_operations if6_seq_ops = {
2682 .start = if6_seq_start,
2683 .next = if6_seq_next,
2684 .show = if6_seq_show,
2685 .stop = if6_seq_stop,
2688 static int if6_seq_open(struct inode *inode, struct file *file)
2690 struct seq_file *seq;
2692 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2697 rc = seq_open(file, &if6_seq_ops);
2701 seq = file->private_data;
2710 static const struct file_operations if6_fops = {
2711 .owner = THIS_MODULE,
2712 .open = if6_seq_open,
2714 .llseek = seq_lseek,
2715 .release = seq_release_private,
2718 int __init if6_proc_init(void)
2720 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2725 void if6_proc_exit(void)
2727 proc_net_remove("if_inet6");
2729 #endif /* CONFIG_PROC_FS */
2731 #ifdef CONFIG_IPV6_MIP6
2732 /* Check if address is a home address configured on any interface. */
2733 int ipv6_chk_home_addr(struct in6_addr *addr)
2736 struct inet6_ifaddr * ifp;
2737 u8 hash = ipv6_addr_hash(addr);
2738 read_lock_bh(&addrconf_hash_lock);
2739 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2740 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2741 (ifp->flags & IFA_F_HOMEADDRESS)) {
2746 read_unlock_bh(&addrconf_hash_lock);
2752 * Periodic address status verification
2755 static void addrconf_verify(unsigned long foo)
2757 struct inet6_ifaddr *ifp;
2758 unsigned long now, next;
2761 spin_lock_bh(&addrconf_verify_lock);
2763 next = now + ADDR_CHECK_FREQUENCY;
2765 del_timer(&addr_chk_timer);
2767 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2770 read_lock(&addrconf_hash_lock);
2771 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2773 #ifdef CONFIG_IPV6_PRIVACY
2774 unsigned long regen_advance;
2777 if (ifp->flags & IFA_F_PERMANENT)
2780 spin_lock(&ifp->lock);
2781 age = (now - ifp->tstamp) / HZ;
2783 #ifdef CONFIG_IPV6_PRIVACY
2784 regen_advance = ifp->idev->cnf.regen_max_retry *
2785 ifp->idev->cnf.dad_transmits *
2786 ifp->idev->nd_parms->retrans_time / HZ;
2789 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2790 age >= ifp->valid_lft) {
2791 spin_unlock(&ifp->lock);
2793 read_unlock(&addrconf_hash_lock);
2796 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2797 spin_unlock(&ifp->lock);
2799 } else if (age >= ifp->prefered_lft) {
2800 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2803 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2805 ifp->flags |= IFA_F_DEPRECATED;
2808 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2809 next = ifp->tstamp + ifp->valid_lft * HZ;
2811 spin_unlock(&ifp->lock);
2815 read_unlock(&addrconf_hash_lock);
2817 ipv6_ifa_notify(0, ifp);
2821 #ifdef CONFIG_IPV6_PRIVACY
2822 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2823 !(ifp->flags&IFA_F_TENTATIVE)) {
2824 if (age >= ifp->prefered_lft - regen_advance) {
2825 struct inet6_ifaddr *ifpub = ifp->ifpub;
2826 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2827 next = ifp->tstamp + ifp->prefered_lft * HZ;
2828 if (!ifp->regen_count && ifpub) {
2831 in6_ifa_hold(ifpub);
2832 spin_unlock(&ifp->lock);
2833 read_unlock(&addrconf_hash_lock);
2834 spin_lock(&ifpub->lock);
2835 ifpub->regen_count = 0;
2836 spin_unlock(&ifpub->lock);
2837 ipv6_create_tempaddr(ifpub, ifp);
2842 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2843 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2844 spin_unlock(&ifp->lock);
2847 /* ifp->prefered_lft <= ifp->valid_lft */
2848 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2849 next = ifp->tstamp + ifp->prefered_lft * HZ;
2850 spin_unlock(&ifp->lock);
2853 read_unlock(&addrconf_hash_lock);
2856 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2857 add_timer(&addr_chk_timer);
2858 spin_unlock_bh(&addrconf_verify_lock);
2861 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2863 struct in6_addr *pfx = NULL;
2866 pfx = nla_data(addr);
2869 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2872 pfx = nla_data(local);
2878 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2879 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2880 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2881 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2885 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2887 struct ifaddrmsg *ifm;
2888 struct nlattr *tb[IFA_MAX+1];
2889 struct in6_addr *pfx;
2892 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2896 ifm = nlmsg_data(nlh);
2897 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2901 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2904 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
2905 u32 prefered_lft, u32 valid_lft)
2907 if (!valid_lft || (prefered_lft > valid_lft))
2910 if (valid_lft == INFINITY_LIFE_TIME)
2911 ifa_flags |= IFA_F_PERMANENT;
2912 else if (valid_lft >= 0x7FFFFFFF/HZ)
2913 valid_lft = 0x7FFFFFFF/HZ;
2915 if (prefered_lft == 0)
2916 ifa_flags |= IFA_F_DEPRECATED;
2917 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
2918 (prefered_lft != INFINITY_LIFE_TIME))
2919 prefered_lft = 0x7FFFFFFF/HZ;
2921 spin_lock_bh(&ifp->lock);
2922 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
2923 ifp->tstamp = jiffies;
2924 ifp->valid_lft = valid_lft;
2925 ifp->prefered_lft = prefered_lft;
2927 spin_unlock_bh(&ifp->lock);
2928 if (!(ifp->flags&IFA_F_TENTATIVE))
2929 ipv6_ifa_notify(0, ifp);
2937 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2939 struct ifaddrmsg *ifm;
2940 struct nlattr *tb[IFA_MAX+1];
2941 struct in6_addr *pfx;
2942 struct inet6_ifaddr *ifa;
2943 struct net_device *dev;
2944 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
2948 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2952 ifm = nlmsg_data(nlh);
2953 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2957 if (tb[IFA_CACHEINFO]) {
2958 struct ifa_cacheinfo *ci;
2960 ci = nla_data(tb[IFA_CACHEINFO]);
2961 valid_lft = ci->ifa_valid;
2962 preferred_lft = ci->ifa_prefered;
2964 preferred_lft = INFINITY_LIFE_TIME;
2965 valid_lft = INFINITY_LIFE_TIME;
2968 dev = __dev_get_by_index(ifm->ifa_index);
2972 /* We ignore other flags so far. */
2973 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
2975 ifa = ipv6_get_ifaddr(pfx, dev, 1);
2978 * It would be best to check for !NLM_F_CREATE here but
2979 * userspace alreay relies on not having to provide this.
2981 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
2982 ifa_flags, preferred_lft, valid_lft);
2985 if (nlh->nlmsg_flags & NLM_F_EXCL ||
2986 !(nlh->nlmsg_flags & NLM_F_REPLACE))
2989 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
2996 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
2997 u8 scope, int ifindex)
2999 struct ifaddrmsg *ifm;
3001 ifm = nlmsg_data(nlh);
3002 ifm->ifa_family = AF_INET6;
3003 ifm->ifa_prefixlen = prefixlen;
3004 ifm->ifa_flags = flags;
3005 ifm->ifa_scope = scope;
3006 ifm->ifa_index = ifindex;
3009 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3010 unsigned long tstamp, u32 preferred, u32 valid)
3012 struct ifa_cacheinfo ci;
3014 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3015 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3016 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3017 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3018 ci.ifa_prefered = preferred;
3019 ci.ifa_valid = valid;
3021 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3024 static inline int rt_scope(int ifa_scope)
3026 if (ifa_scope & IFA_HOST)
3027 return RT_SCOPE_HOST;
3028 else if (ifa_scope & IFA_LINK)
3029 return RT_SCOPE_LINK;
3030 else if (ifa_scope & IFA_SITE)
3031 return RT_SCOPE_SITE;
3033 return RT_SCOPE_UNIVERSE;
3036 static inline int inet6_ifaddr_msgsize(void)
3038 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3039 + nla_total_size(16) /* IFA_ADDRESS */
3040 + nla_total_size(sizeof(struct ifa_cacheinfo));
3043 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3044 u32 pid, u32 seq, int event, unsigned int flags)
3046 struct nlmsghdr *nlh;
3047 u32 preferred, valid;
3049 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3053 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3054 ifa->idev->dev->ifindex);
3056 if (!(ifa->flags&IFA_F_PERMANENT)) {
3057 preferred = ifa->prefered_lft;
3058 valid = ifa->valid_lft;
3059 if (preferred != INFINITY_LIFE_TIME) {
3060 long tval = (jiffies - ifa->tstamp)/HZ;
3062 if (valid != INFINITY_LIFE_TIME)
3066 preferred = INFINITY_LIFE_TIME;
3067 valid = INFINITY_LIFE_TIME;
3070 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3071 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3072 nlmsg_cancel(skb, nlh);
3076 return nlmsg_end(skb, nlh);
3079 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3080 u32 pid, u32 seq, int event, u16 flags)
3082 struct nlmsghdr *nlh;
3083 u8 scope = RT_SCOPE_UNIVERSE;
3084 int ifindex = ifmca->idev->dev->ifindex;
3086 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3087 scope = RT_SCOPE_SITE;
3089 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3093 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3094 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3095 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3096 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3097 nlmsg_cancel(skb, nlh);
3101 return nlmsg_end(skb, nlh);
3104 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3105 u32 pid, u32 seq, int event, unsigned int flags)
3107 struct nlmsghdr *nlh;
3108 u8 scope = RT_SCOPE_UNIVERSE;
3109 int ifindex = ifaca->aca_idev->dev->ifindex;
3111 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3112 scope = RT_SCOPE_SITE;
3114 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3118 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3119 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3120 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3121 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3122 nlmsg_cancel(skb, nlh);
3126 return nlmsg_end(skb, nlh);
3136 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3137 enum addr_type_t type)
3140 int s_idx, s_ip_idx;
3142 struct net_device *dev;
3143 struct inet6_dev *idev = NULL;
3144 struct inet6_ifaddr *ifa;
3145 struct ifmcaddr6 *ifmca;
3146 struct ifacaddr6 *ifaca;
3148 s_idx = cb->args[0];
3149 s_ip_idx = ip_idx = cb->args[1];
3150 read_lock(&dev_base_lock);
3152 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3158 if ((idev = in6_dev_get(dev)) == NULL)
3160 read_lock_bh(&idev->lock);
3163 /* unicast address incl. temp addr */
3164 for (ifa = idev->addr_list; ifa;
3165 ifa = ifa->if_next, ip_idx++) {
3166 if (ip_idx < s_ip_idx)
3168 if ((err = inet6_fill_ifaddr(skb, ifa,
3169 NETLINK_CB(cb->skb).pid,
3170 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3175 case MULTICAST_ADDR:
3176 /* multicast address */
3177 for (ifmca = idev->mc_list; ifmca;
3178 ifmca = ifmca->next, ip_idx++) {
3179 if (ip_idx < s_ip_idx)
3181 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3182 NETLINK_CB(cb->skb).pid,
3183 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3189 /* anycast address */
3190 for (ifaca = idev->ac_list; ifaca;
3191 ifaca = ifaca->aca_next, ip_idx++) {
3192 if (ip_idx < s_ip_idx)
3194 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3195 NETLINK_CB(cb->skb).pid,
3196 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3204 read_unlock_bh(&idev->lock);
3209 read_unlock_bh(&idev->lock);
3212 read_unlock(&dev_base_lock);
3214 cb->args[1] = ip_idx;
3218 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3220 enum addr_type_t type = UNICAST_ADDR;
3221 return inet6_dump_addr(skb, cb, type);
3224 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3226 enum addr_type_t type = MULTICAST_ADDR;
3227 return inet6_dump_addr(skb, cb, type);
3231 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3233 enum addr_type_t type = ANYCAST_ADDR;
3234 return inet6_dump_addr(skb, cb, type);
3237 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3240 struct ifaddrmsg *ifm;
3241 struct nlattr *tb[IFA_MAX+1];
3242 struct in6_addr *addr = NULL;
3243 struct net_device *dev = NULL;
3244 struct inet6_ifaddr *ifa;
3245 struct sk_buff *skb;
3248 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3252 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3258 ifm = nlmsg_data(nlh);
3260 dev = __dev_get_by_index(ifm->ifa_index);
3262 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3263 err = -EADDRNOTAVAIL;
3267 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3272 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3273 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3275 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3276 WARN_ON(err == -EMSGSIZE);
3280 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3287 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3289 struct sk_buff *skb;
3292 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3296 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3298 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3299 WARN_ON(err == -EMSGSIZE);
3303 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3306 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3309 static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3310 __s32 *array, int bytes)
3312 BUG_ON(bytes < (DEVCONF_MAX * 4));
3314 memset(array, 0, bytes);
3315 array[DEVCONF_FORWARDING] = cnf->forwarding;
3316 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3317 array[DEVCONF_MTU6] = cnf->mtu6;
3318 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3319 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3320 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3321 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3322 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3323 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3324 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3325 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3326 #ifdef CONFIG_IPV6_PRIVACY
3327 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3328 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3329 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3330 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3331 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3333 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3334 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3335 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3336 #ifdef CONFIG_IPV6_ROUTER_PREF
3337 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3338 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3339 #ifdef CONFIG_IPV6_ROUTE_INFO
3340 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3343 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3346 static inline size_t inet6_if_nlmsg_size(void)
3348 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3349 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3350 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3351 + nla_total_size(4) /* IFLA_MTU */
3352 + nla_total_size(4) /* IFLA_LINK */
3353 + nla_total_size( /* IFLA_PROTINFO */
3354 nla_total_size(4) /* IFLA_INET6_FLAGS */
3355 + nla_total_size(sizeof(struct ifla_cacheinfo))
3356 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3360 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3361 u32 pid, u32 seq, int event, unsigned int flags)
3363 struct net_device *dev = idev->dev;
3364 struct nlattr *conf;
3365 struct ifinfomsg *hdr;
3366 struct nlmsghdr *nlh;
3368 struct ifla_cacheinfo ci;
3370 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3374 hdr = nlmsg_data(nlh);
3375 hdr->ifi_family = AF_INET6;
3377 hdr->ifi_type = dev->type;
3378 hdr->ifi_index = dev->ifindex;
3379 hdr->ifi_flags = dev_get_flags(dev);
3380 hdr->ifi_change = 0;
3382 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3385 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3387 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3388 if (dev->ifindex != dev->iflink)
3389 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3391 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3392 if (protoinfo == NULL)
3393 goto nla_put_failure;
3395 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3397 ci.max_reasm_len = IPV6_MAXPLEN;
3398 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3399 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3400 ci.reachable_time = idev->nd_parms->reachable_time;
3401 ci.retrans_time = idev->nd_parms->retrans_time;
3402 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3404 conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3406 goto nla_put_failure;
3407 ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf));
3409 /* XXX - Statistics/MC not implemented */
3411 nla_nest_end(skb, protoinfo);
3412 return nlmsg_end(skb, nlh);
3415 nlmsg_cancel(skb, nlh);
3419 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3422 int s_idx = cb->args[0];
3423 struct net_device *dev;
3424 struct inet6_dev *idev;
3426 read_lock(&dev_base_lock);
3427 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3430 if ((idev = in6_dev_get(dev)) == NULL)
3432 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3433 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3438 read_unlock(&dev_base_lock);
3444 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3446 struct sk_buff *skb;
3449 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3453 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3455 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3456 WARN_ON(err == -EMSGSIZE);
3460 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3463 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3466 static inline size_t inet6_prefix_nlmsg_size(void)
3468 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3469 + nla_total_size(sizeof(struct in6_addr))
3470 + nla_total_size(sizeof(struct prefix_cacheinfo));
3473 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3474 struct prefix_info *pinfo, u32 pid, u32 seq,
3475 int event, unsigned int flags)
3477 struct prefixmsg *pmsg;
3478 struct nlmsghdr *nlh;
3479 struct prefix_cacheinfo ci;
3481 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3485 pmsg = nlmsg_data(nlh);
3486 pmsg->prefix_family = AF_INET6;
3487 pmsg->prefix_pad1 = 0;
3488 pmsg->prefix_pad2 = 0;
3489 pmsg->prefix_ifindex = idev->dev->ifindex;
3490 pmsg->prefix_len = pinfo->prefix_len;
3491 pmsg->prefix_type = pinfo->type;
3492 pmsg->prefix_pad3 = 0;
3493 pmsg->prefix_flags = 0;
3495 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3496 if (pinfo->autoconf)
3497 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3499 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3501 ci.preferred_time = ntohl(pinfo->prefered);
3502 ci.valid_time = ntohl(pinfo->valid);
3503 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3505 return nlmsg_end(skb, nlh);
3508 nlmsg_cancel(skb, nlh);
3512 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3513 struct prefix_info *pinfo)
3515 struct sk_buff *skb;
3518 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3522 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3524 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3525 WARN_ON(err == -EMSGSIZE);
3529 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3532 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3535 static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
3536 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3537 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3538 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3539 [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr,
3540 .dumpit = inet6_dump_ifaddr, },
3541 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3542 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3543 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3544 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3545 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3546 .dumpit = inet6_dump_fib, },
3547 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3548 [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, },
3552 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3554 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3558 ip6_ins_rt(ifp->rt);
3559 if (ifp->idev->cnf.forwarding)
3560 addrconf_join_anycast(ifp);
3563 if (ifp->idev->cnf.forwarding)
3564 addrconf_leave_anycast(ifp);
3565 addrconf_leave_solict(ifp->idev, &ifp->addr);
3566 dst_hold(&ifp->rt->u.dst);
3567 if (ip6_del_rt(ifp->rt))
3568 dst_free(&ifp->rt->u.dst);
3573 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3576 if (likely(ifp->idev->dead == 0))
3577 __ipv6_ifa_notify(event, ifp);
3578 rcu_read_unlock_bh();
3581 #ifdef CONFIG_SYSCTL
3584 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3585 void __user *buffer, size_t *lenp, loff_t *ppos)
3587 int *valp = ctl->data;
3591 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3593 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3594 if (valp != &ipv6_devconf.forwarding) {
3595 if ((!*valp) ^ (!val)) {
3596 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3599 dev_forward_change(idev);
3602 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3603 addrconf_forward_change();
3606 rt6_purge_dflt_routers();
3612 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3613 int __user *name, int nlen,
3614 void __user *oldval,
3615 size_t __user *oldlenp,
3616 void __user *newval, size_t newlen)
3618 int *valp = table->data;
3621 if (!newval || !newlen)
3623 if (newlen != sizeof(int))
3625 if (get_user(new, (int __user *)newval))
3629 if (oldval && oldlenp) {
3631 if (get_user(len, oldlenp))
3634 if (len > table->maxlen)
3635 len = table->maxlen;
3636 if (copy_to_user(oldval, valp, len))
3638 if (put_user(len, oldlenp))
3643 if (valp != &ipv6_devconf_dflt.forwarding) {
3644 if (valp != &ipv6_devconf.forwarding) {
3645 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3647 if (unlikely(idev == NULL))
3649 changed = (!*valp) ^ (!new);
3652 dev_forward_change(idev);
3655 addrconf_forward_change();
3659 rt6_purge_dflt_routers();
3666 static struct addrconf_sysctl_table
3668 struct ctl_table_header *sysctl_header;
3669 ctl_table addrconf_vars[__NET_IPV6_MAX];
3670 ctl_table addrconf_dev[2];
3671 ctl_table addrconf_conf_dir[2];
3672 ctl_table addrconf_proto_dir[2];
3673 ctl_table addrconf_root_dir[2];
3674 } addrconf_sysctl __read_mostly = {
3675 .sysctl_header = NULL,
3678 .ctl_name = NET_IPV6_FORWARDING,
3679 .procname = "forwarding",
3680 .data = &ipv6_devconf.forwarding,
3681 .maxlen = sizeof(int),
3683 .proc_handler = &addrconf_sysctl_forward,
3684 .strategy = &addrconf_sysctl_forward_strategy,
3687 .ctl_name = NET_IPV6_HOP_LIMIT,
3688 .procname = "hop_limit",
3689 .data = &ipv6_devconf.hop_limit,
3690 .maxlen = sizeof(int),
3692 .proc_handler = proc_dointvec,
3695 .ctl_name = NET_IPV6_MTU,
3697 .data = &ipv6_devconf.mtu6,
3698 .maxlen = sizeof(int),
3700 .proc_handler = &proc_dointvec,
3703 .ctl_name = NET_IPV6_ACCEPT_RA,
3704 .procname = "accept_ra",
3705 .data = &ipv6_devconf.accept_ra,
3706 .maxlen = sizeof(int),
3708 .proc_handler = &proc_dointvec,
3711 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3712 .procname = "accept_redirects",
3713 .data = &ipv6_devconf.accept_redirects,
3714 .maxlen = sizeof(int),
3716 .proc_handler = &proc_dointvec,
3719 .ctl_name = NET_IPV6_AUTOCONF,
3720 .procname = "autoconf",
3721 .data = &ipv6_devconf.autoconf,
3722 .maxlen = sizeof(int),
3724 .proc_handler = &proc_dointvec,
3727 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3728 .procname = "dad_transmits",
3729 .data = &ipv6_devconf.dad_transmits,
3730 .maxlen = sizeof(int),
3732 .proc_handler = &proc_dointvec,
3735 .ctl_name = NET_IPV6_RTR_SOLICITS,
3736 .procname = "router_solicitations",
3737 .data = &ipv6_devconf.rtr_solicits,
3738 .maxlen = sizeof(int),
3740 .proc_handler = &proc_dointvec,
3743 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3744 .procname = "router_solicitation_interval",
3745 .data = &ipv6_devconf.rtr_solicit_interval,
3746 .maxlen = sizeof(int),
3748 .proc_handler = &proc_dointvec_jiffies,
3749 .strategy = &sysctl_jiffies,
3752 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3753 .procname = "router_solicitation_delay",
3754 .data = &ipv6_devconf.rtr_solicit_delay,
3755 .maxlen = sizeof(int),
3757 .proc_handler = &proc_dointvec_jiffies,
3758 .strategy = &sysctl_jiffies,
3761 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3762 .procname = "force_mld_version",
3763 .data = &ipv6_devconf.force_mld_version,
3764 .maxlen = sizeof(int),
3766 .proc_handler = &proc_dointvec,
3768 #ifdef CONFIG_IPV6_PRIVACY
3770 .ctl_name = NET_IPV6_USE_TEMPADDR,
3771 .procname = "use_tempaddr",
3772 .data = &ipv6_devconf.use_tempaddr,
3773 .maxlen = sizeof(int),
3775 .proc_handler = &proc_dointvec,
3778 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3779 .procname = "temp_valid_lft",
3780 .data = &ipv6_devconf.temp_valid_lft,
3781 .maxlen = sizeof(int),
3783 .proc_handler = &proc_dointvec,
3786 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3787 .procname = "temp_prefered_lft",
3788 .data = &ipv6_devconf.temp_prefered_lft,
3789 .maxlen = sizeof(int),
3791 .proc_handler = &proc_dointvec,
3794 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3795 .procname = "regen_max_retry",
3796 .data = &ipv6_devconf.regen_max_retry,
3797 .maxlen = sizeof(int),
3799 .proc_handler = &proc_dointvec,
3802 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3803 .procname = "max_desync_factor",
3804 .data = &ipv6_devconf.max_desync_factor,
3805 .maxlen = sizeof(int),
3807 .proc_handler = &proc_dointvec,
3811 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3812 .procname = "max_addresses",
3813 .data = &ipv6_devconf.max_addresses,
3814 .maxlen = sizeof(int),
3816 .proc_handler = &proc_dointvec,
3819 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3820 .procname = "accept_ra_defrtr",
3821 .data = &ipv6_devconf.accept_ra_defrtr,
3822 .maxlen = sizeof(int),
3824 .proc_handler = &proc_dointvec,
3827 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3828 .procname = "accept_ra_pinfo",
3829 .data = &ipv6_devconf.accept_ra_pinfo,
3830 .maxlen = sizeof(int),
3832 .proc_handler = &proc_dointvec,
3834 #ifdef CONFIG_IPV6_ROUTER_PREF
3836 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3837 .procname = "accept_ra_rtr_pref",
3838 .data = &ipv6_devconf.accept_ra_rtr_pref,
3839 .maxlen = sizeof(int),
3841 .proc_handler = &proc_dointvec,
3844 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3845 .procname = "router_probe_interval",
3846 .data = &ipv6_devconf.rtr_probe_interval,
3847 .maxlen = sizeof(int),
3849 .proc_handler = &proc_dointvec_jiffies,
3850 .strategy = &sysctl_jiffies,
3852 #ifdef CONFIG_IPV6_ROUTE_INFO
3854 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3855 .procname = "accept_ra_rt_info_max_plen",
3856 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3857 .maxlen = sizeof(int),
3859 .proc_handler = &proc_dointvec,
3864 .ctl_name = NET_IPV6_PROXY_NDP,
3865 .procname = "proxy_ndp",
3866 .data = &ipv6_devconf.proxy_ndp,
3867 .maxlen = sizeof(int),
3869 .proc_handler = &proc_dointvec,
3872 .ctl_name = 0, /* sentinel */
3877 .ctl_name = NET_PROTO_CONF_ALL,
3880 .child = addrconf_sysctl.addrconf_vars,
3883 .ctl_name = 0, /* sentinel */
3886 .addrconf_conf_dir = {
3888 .ctl_name = NET_IPV6_CONF,
3891 .child = addrconf_sysctl.addrconf_dev,
3894 .ctl_name = 0, /* sentinel */
3897 .addrconf_proto_dir = {
3899 .ctl_name = NET_IPV6,
3902 .child = addrconf_sysctl.addrconf_conf_dir,
3905 .ctl_name = 0, /* sentinel */
3908 .addrconf_root_dir = {
3910 .ctl_name = CTL_NET,
3913 .child = addrconf_sysctl.addrconf_proto_dir,
3916 .ctl_name = 0, /* sentinel */
3921 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3924 struct net_device *dev = idev ? idev->dev : NULL;
3925 struct addrconf_sysctl_table *t;
3926 char *dev_name = NULL;
3928 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
3931 for (i=0; t->addrconf_vars[i].data; i++) {
3932 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3933 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3936 dev_name = dev->name;
3937 t->addrconf_dev[0].ctl_name = dev->ifindex;
3939 dev_name = "default";
3940 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3944 * Make a copy of dev_name, because '.procname' is regarded as const
3945 * by sysctl and we wouldn't want anyone to change it under our feet
3946 * (see SIOCSIFNAME).
3948 dev_name = kstrdup(dev_name, GFP_KERNEL);
3952 t->addrconf_dev[0].procname = dev_name;
3954 t->addrconf_dev[0].child = t->addrconf_vars;
3955 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3956 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3957 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3959 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
3960 if (t->sysctl_header == NULL)
3975 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3978 struct addrconf_sysctl_table *t = p->sysctl;
3980 unregister_sysctl_table(t->sysctl_header);
3981 kfree(t->addrconf_dev[0].procname);
3993 int register_inet6addr_notifier(struct notifier_block *nb)
3995 return atomic_notifier_chain_register(&inet6addr_chain, nb);
3998 int unregister_inet6addr_notifier(struct notifier_block *nb)
4000 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4004 * Init / cleanup code
4007 int __init addrconf_init(void)
4011 /* The addrconf netdev notifier requires that loopback_dev
4012 * has it's ipv6 private information allocated and setup
4013 * before it can bring up and give link-local addresses
4014 * to other devices which are up.
4016 * Unfortunately, loopback_dev is not necessarily the first
4017 * entry in the global dev_base list of net devices. In fact,
4018 * it is likely to be the very last entry on that list.
4019 * So this causes the notifier registry below to try and
4020 * give link-local addresses to all devices besides loopback_dev
4021 * first, then loopback_dev, which cases all the non-loopback_dev
4022 * devices to fail to get a link-local address.
4024 * So, as a temporary fix, allocate the ipv6 structure for
4025 * loopback_dev first by hand.
4026 * Longer term, all of the dependencies ipv6 has upon the loopback
4027 * device and it being up should be removed.
4030 if (!ipv6_add_dev(&loopback_dev))
4036 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4038 register_netdevice_notifier(&ipv6_dev_notf);
4041 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
4042 #ifdef CONFIG_SYSCTL
4043 addrconf_sysctl.sysctl_header =
4044 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
4045 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4051 void __exit addrconf_cleanup(void)
4053 struct net_device *dev;
4054 struct inet6_dev *idev;
4055 struct inet6_ifaddr *ifa;
4058 unregister_netdevice_notifier(&ipv6_dev_notf);
4060 rtnetlink_links[PF_INET6] = NULL;
4061 #ifdef CONFIG_SYSCTL
4062 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4063 addrconf_sysctl_unregister(&ipv6_devconf);
4072 for (dev=dev_base; dev; dev=dev->next) {
4073 if ((idev = __in6_dev_get(dev)) == NULL)
4075 addrconf_ifdown(dev, 1);
4077 addrconf_ifdown(&loopback_dev, 2);
4083 write_lock_bh(&addrconf_hash_lock);
4084 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4085 for (ifa=inet6_addr_lst[i]; ifa; ) {
4086 struct inet6_ifaddr *bifa;
4089 ifa = ifa->lst_next;
4090 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4091 /* Do not free it; something is wrong.
4092 Now we can investigate it with debugger.
4096 write_unlock_bh(&addrconf_hash_lock);
4098 del_timer(&addr_chk_timer);
4102 #ifdef CONFIG_PROC_FS
4103 proc_net_remove("if_inet6");