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 (ifa->flags&IFA_F_TENTATIVE)
405 if (idev->cnf.forwarding)
406 addrconf_join_anycast(ifa);
408 addrconf_leave_anycast(ifa);
413 static void addrconf_forward_change(void)
415 struct net_device *dev;
416 struct inet6_dev *idev;
418 read_lock(&dev_base_lock);
419 for (dev=dev_base; dev; dev=dev->next) {
421 idev = __in6_dev_get(dev);
423 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
424 idev->cnf.forwarding = ipv6_devconf.forwarding;
426 dev_forward_change(idev);
430 read_unlock(&dev_base_lock);
434 /* Nobody refers to this ifaddr, destroy it */
436 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
438 BUG_TRAP(ifp->if_next==NULL);
439 BUG_TRAP(ifp->lst_next==NULL);
440 #ifdef NET_REFCNT_DEBUG
441 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
444 in6_dev_put(ifp->idev);
446 if (del_timer(&ifp->timer))
447 printk("Timer is still running, when freeing ifa=%p\n", ifp);
450 printk("Freeing alive inet6 address %p\n", ifp);
453 dst_release(&ifp->rt->u.dst);
459 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
461 struct inet6_ifaddr *ifa, **ifap;
462 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
465 * Each device address list is sorted in order of scope -
466 * global before linklocal.
468 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
469 ifap = &ifa->if_next) {
470 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
474 ifp->if_next = *ifap;
478 /* On success it returns ifp with increased reference count */
480 static struct inet6_ifaddr *
481 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
482 int scope, u32 flags)
484 struct inet6_ifaddr *ifa = NULL;
491 err = -ENODEV; /*XXX*/
495 write_lock(&addrconf_hash_lock);
497 /* Ignore adding duplicate addresses on an interface */
498 if (ipv6_chk_same_addr(addr, idev->dev)) {
499 ADBG(("ipv6_add_addr: already assigned\n"));
504 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
507 ADBG(("ipv6_add_addr: malloc failed\n"));
512 rt = addrconf_dst_alloc(idev, addr, 0);
518 ipv6_addr_copy(&ifa->addr, addr);
520 spin_lock_init(&ifa->lock);
521 init_timer(&ifa->timer);
522 ifa->timer.data = (unsigned long) ifa;
524 ifa->prefix_len = pfxlen;
525 ifa->flags = flags | IFA_F_TENTATIVE;
526 ifa->cstamp = ifa->tstamp = jiffies;
535 /* Add to big hash table */
536 hash = ipv6_addr_hash(addr);
538 ifa->lst_next = inet6_addr_lst[hash];
539 inet6_addr_lst[hash] = ifa;
541 write_unlock(&addrconf_hash_lock);
543 write_lock(&idev->lock);
544 /* Add to inet6_dev unicast addr list. */
545 ipv6_link_dev_addr(idev, ifa);
547 #ifdef CONFIG_IPV6_PRIVACY
548 if (ifa->flags&IFA_F_TEMPORARY) {
549 ifa->tmp_next = idev->tempaddr_list;
550 idev->tempaddr_list = ifa;
556 write_unlock(&idev->lock);
558 rcu_read_unlock_bh();
560 if (likely(err == 0))
561 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
569 write_unlock(&addrconf_hash_lock);
573 /* This function wants to get referenced ifp and releases it before return */
575 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
577 struct inet6_ifaddr *ifa, **ifap;
578 struct inet6_dev *idev = ifp->idev;
580 int deleted = 0, onlink = 0;
581 unsigned long expires = jiffies;
583 hash = ipv6_addr_hash(&ifp->addr);
587 write_lock_bh(&addrconf_hash_lock);
588 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
589 ifap = &ifa->lst_next) {
591 *ifap = ifa->lst_next;
593 ifa->lst_next = NULL;
597 write_unlock_bh(&addrconf_hash_lock);
599 write_lock_bh(&idev->lock);
600 #ifdef CONFIG_IPV6_PRIVACY
601 if (ifp->flags&IFA_F_TEMPORARY) {
602 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
603 ifap = &ifa->tmp_next) {
605 *ifap = ifa->tmp_next;
607 in6_ifa_put(ifp->ifpub);
611 ifa->tmp_next = NULL;
618 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
620 *ifap = ifa->if_next;
623 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
627 } else if (ifp->flags & IFA_F_PERMANENT) {
628 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
630 if (ifa->flags & IFA_F_PERMANENT) {
635 unsigned long lifetime;
640 spin_lock(&ifa->lock);
641 lifetime = min_t(unsigned long,
642 ifa->valid_lft, 0x7fffffffUL/HZ);
643 if (time_before(expires,
644 ifa->tstamp + lifetime * HZ))
645 expires = ifa->tstamp + lifetime * HZ;
646 spin_unlock(&ifa->lock);
650 ifap = &ifa->if_next;
652 write_unlock_bh(&idev->lock);
654 ipv6_ifa_notify(RTM_DELADDR, ifp);
656 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
658 addrconf_del_timer(ifp);
661 * Purge or update corresponding prefix
663 * 1) we don't purge prefix here if address was not permanent.
664 * prefix is managed by its own lifetime.
665 * 2) if there're no addresses, delete prefix.
666 * 3) if there're still other permanent address(es),
667 * corresponding prefix is still permanent.
668 * 4) otherwise, update prefix lifetime to the
669 * longest valid lifetime among the corresponding
670 * addresses on the device.
671 * Note: subsequent RA will update lifetime.
675 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
676 struct in6_addr prefix;
679 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
680 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
682 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
686 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
687 rt->rt6i_expires = expires;
688 rt->rt6i_flags |= RTF_EXPIRES;
691 dst_release(&rt->u.dst);
697 #ifdef CONFIG_IPV6_PRIVACY
698 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
700 struct inet6_dev *idev = ifp->idev;
701 struct in6_addr addr, *tmpaddr;
702 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
707 write_lock(&idev->lock);
709 spin_lock_bh(&ift->lock);
710 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
711 spin_unlock_bh(&ift->lock);
718 if (idev->cnf.use_tempaddr <= 0) {
719 write_unlock(&idev->lock);
721 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
726 spin_lock_bh(&ifp->lock);
727 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
728 idev->cnf.use_tempaddr = -1; /*XXX*/
729 spin_unlock_bh(&ifp->lock);
730 write_unlock(&idev->lock);
732 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
738 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
739 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
740 spin_unlock_bh(&ifp->lock);
741 write_unlock(&idev->lock);
743 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
749 memcpy(&addr.s6_addr[8], idev->rndid, 8);
750 tmp_valid_lft = min_t(__u32,
752 idev->cnf.temp_valid_lft);
753 tmp_prefered_lft = min_t(__u32,
755 idev->cnf.temp_prefered_lft - desync_factor / HZ);
756 tmp_plen = ifp->prefix_len;
757 max_addresses = idev->cnf.max_addresses;
758 tmp_cstamp = ifp->cstamp;
759 tmp_tstamp = ifp->tstamp;
760 spin_unlock_bh(&ifp->lock);
762 write_unlock(&idev->lock);
763 ift = !max_addresses ||
764 ipv6_count_addresses(idev) < max_addresses ?
765 ipv6_add_addr(idev, &addr, tmp_plen,
766 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
767 if (!ift || IS_ERR(ift)) {
771 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
773 write_lock(&idev->lock);
777 spin_lock_bh(&ift->lock);
779 ift->valid_lft = tmp_valid_lft;
780 ift->prefered_lft = tmp_prefered_lft;
781 ift->cstamp = tmp_cstamp;
782 ift->tstamp = tmp_tstamp;
783 spin_unlock_bh(&ift->lock);
785 addrconf_dad_start(ift, 0);
794 * Choose an appropriate source address (RFC3484)
796 struct ipv6_saddr_score {
804 #define IPV6_SADDR_SCORE_LOCAL 0x0001
805 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
806 #define IPV6_SADDR_SCORE_HOA 0x0008
807 #define IPV6_SADDR_SCORE_OIF 0x0010
808 #define IPV6_SADDR_SCORE_LABEL 0x0020
809 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
811 static int inline ipv6_saddr_preferred(int type)
813 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
814 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
819 /* static matching label */
820 static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
823 * prefix (longest match) label
824 * -----------------------------
833 if (type & IPV6_ADDR_LOOPBACK)
835 else if (type & IPV6_ADDR_COMPATv4)
837 else if (type & IPV6_ADDR_MAPPED)
839 else if (addr->s6_addr32[0] == htonl(0x20010000))
841 else if (addr->s6_addr16[0] == htons(0x2002))
843 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
848 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
849 struct in6_addr *daddr, struct in6_addr *saddr)
851 struct ipv6_saddr_score hiscore;
852 struct inet6_ifaddr *ifa_result = NULL;
853 int daddr_type = __ipv6_addr_type(daddr);
854 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
855 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
856 struct net_device *dev;
858 memset(&hiscore, 0, sizeof(hiscore));
860 read_lock(&dev_base_lock);
863 for (dev = dev_base; dev; dev=dev->next) {
864 struct inet6_dev *idev;
865 struct inet6_ifaddr *ifa;
867 /* Rule 0: Candidate Source Address (section 4)
868 * - multicast and link-local destination address,
869 * the set of candidate source address MUST only
870 * include addresses assigned to interfaces
871 * belonging to the same link as the outgoing
873 * (- For site-local destination addresses, the
874 * set of candidate source addresses MUST only
875 * include addresses assigned to interfaces
876 * belonging to the same site as the outgoing
879 if ((daddr_type & IPV6_ADDR_MULTICAST ||
880 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
881 daddr_dev && dev != daddr_dev)
884 idev = __in6_dev_get(dev);
888 read_lock_bh(&idev->lock);
889 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
890 struct ipv6_saddr_score score;
892 score.addr_type = __ipv6_addr_type(&ifa->addr);
895 * - Tentative Address (RFC2462 section 5.4)
896 * - A tentative address is not considered
897 * "assigned to an interface" in the traditional
899 * - Candidate Source Address (section 4)
900 * - In any case, anycast addresses, multicast
901 * addresses, and the unspecified address MUST
902 * NOT be included in a candidate set.
904 if (ifa->flags & IFA_F_TENTATIVE)
906 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
907 score.addr_type & IPV6_ADDR_MULTICAST)) {
908 LIMIT_NETDEBUG(KERN_DEBUG
909 "ADDRCONF: unspecified / multicast address"
910 "assigned as unicast address on %s",
920 if (ifa_result == NULL) {
921 /* record it if the first available entry */
925 /* Rule 1: Prefer same address */
926 if (hiscore.rule < 1) {
927 if (ipv6_addr_equal(&ifa_result->addr, daddr))
928 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
931 if (ipv6_addr_equal(&ifa->addr, daddr)) {
932 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
933 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
938 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
942 /* Rule 2: Prefer appropriate scope */
943 if (hiscore.rule < 2) {
944 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
947 score.scope = __ipv6_addr_src_scope(score.addr_type);
948 if (hiscore.scope < score.scope) {
949 if (hiscore.scope < daddr_scope) {
954 } else if (score.scope < hiscore.scope) {
955 if (score.scope < daddr_scope)
956 break; /* addresses sorted by scope */
963 /* Rule 3: Avoid deprecated address */
964 if (hiscore.rule < 3) {
965 if (ipv6_saddr_preferred(hiscore.addr_type) ||
966 !(ifa_result->flags & IFA_F_DEPRECATED))
967 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
970 if (ipv6_saddr_preferred(score.addr_type) ||
971 !(ifa->flags & IFA_F_DEPRECATED)) {
972 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
973 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
978 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
982 /* Rule 4: Prefer home address */
983 #ifdef CONFIG_IPV6_MIP6
984 if (hiscore.rule < 4) {
985 if (ifa_result->flags & IFA_F_HOMEADDRESS)
986 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
989 if (ifa->flags & IFA_F_HOMEADDRESS) {
990 score.attrs |= IPV6_SADDR_SCORE_HOA;
991 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
996 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1000 if (hiscore.rule < 4)
1004 /* Rule 5: Prefer outgoing interface */
1005 if (hiscore.rule < 5) {
1006 if (daddr_dev == NULL ||
1007 daddr_dev == ifa_result->idev->dev)
1008 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1011 if (daddr_dev == NULL ||
1012 daddr_dev == ifa->idev->dev) {
1013 score.attrs |= IPV6_SADDR_SCORE_OIF;
1014 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1019 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1023 /* Rule 6: Prefer matching label */
1024 if (hiscore.rule < 6) {
1025 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1026 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1029 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1030 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1031 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1036 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1040 #ifdef CONFIG_IPV6_PRIVACY
1041 /* Rule 7: Prefer public address
1042 * Note: prefer temprary address if use_tempaddr >= 2
1044 if (hiscore.rule < 7) {
1045 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1046 (ifa_result->idev->cnf.use_tempaddr >= 2))
1047 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1050 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1051 (ifa->idev->cnf.use_tempaddr >= 2)) {
1052 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1053 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1058 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1062 if (hiscore.rule < 7)
1065 /* Rule 8: Use longest matching prefix */
1066 if (hiscore.rule < 8) {
1067 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1070 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1071 if (score.matchlen > hiscore.matchlen) {
1076 else if (score.matchlen < hiscore.matchlen)
1080 /* Final Rule: choose first available one */
1084 in6_ifa_put(ifa_result);
1089 read_unlock_bh(&idev->lock);
1092 read_unlock(&dev_base_lock);
1095 return -EADDRNOTAVAIL;
1097 ipv6_addr_copy(saddr, &ifa_result->addr);
1098 in6_ifa_put(ifa_result);
1103 int ipv6_get_saddr(struct dst_entry *dst,
1104 struct in6_addr *daddr, struct in6_addr *saddr)
1106 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1110 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1112 struct inet6_dev *idev;
1113 int err = -EADDRNOTAVAIL;
1116 if ((idev = __in6_dev_get(dev)) != NULL) {
1117 struct inet6_ifaddr *ifp;
1119 read_lock_bh(&idev->lock);
1120 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1121 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1122 ipv6_addr_copy(addr, &ifp->addr);
1127 read_unlock_bh(&idev->lock);
1133 static int ipv6_count_addresses(struct inet6_dev *idev)
1136 struct inet6_ifaddr *ifp;
1138 read_lock_bh(&idev->lock);
1139 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1141 read_unlock_bh(&idev->lock);
1145 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1147 struct inet6_ifaddr * ifp;
1148 u8 hash = ipv6_addr_hash(addr);
1150 read_lock_bh(&addrconf_hash_lock);
1151 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1152 if (ipv6_addr_equal(&ifp->addr, addr) &&
1153 !(ifp->flags&IFA_F_TENTATIVE)) {
1154 if (dev == NULL || ifp->idev->dev == dev ||
1155 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1159 read_unlock_bh(&addrconf_hash_lock);
1164 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1166 struct inet6_ifaddr * ifp;
1167 u8 hash = ipv6_addr_hash(addr);
1169 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1170 if (ipv6_addr_equal(&ifp->addr, addr)) {
1171 if (dev == NULL || ifp->idev->dev == dev)
1178 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1180 struct inet6_ifaddr * ifp;
1181 u8 hash = ipv6_addr_hash(addr);
1183 read_lock_bh(&addrconf_hash_lock);
1184 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1185 if (ipv6_addr_equal(&ifp->addr, addr)) {
1186 if (dev == NULL || ifp->idev->dev == dev ||
1187 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1193 read_unlock_bh(&addrconf_hash_lock);
1198 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1200 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1201 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1202 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1203 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1204 int sk_ipv6only = ipv6_only_sock(sk);
1205 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1206 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1207 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1209 if (!sk2_rcv_saddr && !sk_ipv6only)
1212 if (addr_type2 == IPV6_ADDR_ANY &&
1213 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1216 if (addr_type == IPV6_ADDR_ANY &&
1217 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1220 if (sk2_rcv_saddr6 &&
1221 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1224 if (addr_type == IPV6_ADDR_MAPPED &&
1226 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1232 /* Gets referenced address, destroys ifaddr */
1234 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1236 if (ifp->flags&IFA_F_PERMANENT) {
1237 spin_lock_bh(&ifp->lock);
1238 addrconf_del_timer(ifp);
1239 ifp->flags |= IFA_F_TENTATIVE;
1240 spin_unlock_bh(&ifp->lock);
1242 #ifdef CONFIG_IPV6_PRIVACY
1243 } else if (ifp->flags&IFA_F_TEMPORARY) {
1244 struct inet6_ifaddr *ifpub;
1245 spin_lock_bh(&ifp->lock);
1248 in6_ifa_hold(ifpub);
1249 spin_unlock_bh(&ifp->lock);
1250 ipv6_create_tempaddr(ifpub, ifp);
1253 spin_unlock_bh(&ifp->lock);
1261 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1263 if (net_ratelimit())
1264 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1265 addrconf_dad_stop(ifp);
1268 /* Join to solicited addr multicast group. */
1270 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1272 struct in6_addr maddr;
1274 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1277 addrconf_addr_solict_mult(addr, &maddr);
1278 ipv6_dev_mc_inc(dev, &maddr);
1281 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1283 struct in6_addr maddr;
1285 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1288 addrconf_addr_solict_mult(addr, &maddr);
1289 __ipv6_dev_mc_dec(idev, &maddr);
1292 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1294 struct in6_addr addr;
1295 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1296 if (ipv6_addr_any(&addr))
1298 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1301 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1303 struct in6_addr addr;
1304 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1305 if (ipv6_addr_any(&addr))
1307 __ipv6_dev_ac_dec(ifp->idev, &addr);
1310 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1312 if (dev->addr_len != ETH_ALEN)
1314 memcpy(eui, dev->dev_addr, 3);
1315 memcpy(eui + 5, dev->dev_addr + 3, 3);
1318 * The zSeries OSA network cards can be shared among various
1319 * OS instances, but the OSA cards have only one MAC address.
1320 * This leads to duplicate address conflicts in conjunction
1321 * with IPv6 if more than one instance uses the same card.
1323 * The driver for these cards can deliver a unique 16-bit
1324 * identifier for each instance sharing the same card. It is
1325 * placed instead of 0xFFFE in the interface identifier. The
1326 * "u" bit of the interface identifier is not inverted in this
1327 * case. Hence the resulting interface identifier has local
1328 * scope according to RFC2373.
1331 eui[3] = (dev->dev_id >> 8) & 0xFF;
1332 eui[4] = dev->dev_id & 0xFF;
1341 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1343 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1344 if (dev->addr_len != ARCNET_ALEN)
1347 eui[7] = *(u8*)dev->dev_addr;
1351 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1353 if (dev->addr_len != INFINIBAND_ALEN)
1355 memcpy(eui, dev->dev_addr + 12, 8);
1360 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1362 switch (dev->type) {
1365 case ARPHRD_IEEE802_TR:
1366 return addrconf_ifid_eui48(eui, dev);
1368 return addrconf_ifid_arcnet(eui, dev);
1369 case ARPHRD_INFINIBAND:
1370 return addrconf_ifid_infiniband(eui, dev);
1375 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1378 struct inet6_ifaddr *ifp;
1380 read_lock_bh(&idev->lock);
1381 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1382 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1383 memcpy(eui, ifp->addr.s6_addr+8, 8);
1388 read_unlock_bh(&idev->lock);
1392 #ifdef CONFIG_IPV6_PRIVACY
1393 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1394 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1397 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1398 idev->rndid[0] &= ~0x02;
1401 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1402 * check if generated address is not inappropriate
1404 * - Reserved subnet anycast (RFC 2526)
1405 * 11111101 11....11 1xxxxxxx
1406 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1407 * 00-00-5E-FE-xx-xx-xx-xx
1409 * - XXX: already assigned to an address on the device
1411 if (idev->rndid[0] == 0xfd &&
1412 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1413 (idev->rndid[7]&0x80))
1415 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1416 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1418 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1425 static void ipv6_regen_rndid(unsigned long data)
1427 struct inet6_dev *idev = (struct inet6_dev *) data;
1428 unsigned long expires;
1431 write_lock_bh(&idev->lock);
1436 if (__ipv6_regen_rndid(idev) < 0)
1440 idev->cnf.temp_prefered_lft * HZ -
1441 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1442 if (time_before(expires, jiffies)) {
1444 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1449 if (!mod_timer(&idev->regen_timer, expires))
1453 write_unlock_bh(&idev->lock);
1454 rcu_read_unlock_bh();
1458 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1461 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1462 ret = __ipv6_regen_rndid(idev);
1472 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1473 unsigned long expires, u32 flags)
1475 struct fib6_config cfg = {
1476 .fc_table = RT6_TABLE_PREFIX,
1477 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1478 .fc_ifindex = dev->ifindex,
1479 .fc_expires = expires,
1481 .fc_flags = RTF_UP | flags,
1484 ipv6_addr_copy(&cfg.fc_dst, pfx);
1486 /* Prevent useless cloning on PtP SIT.
1487 This thing is done here expecting that the whole
1488 class of non-broadcast devices need not cloning.
1490 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1491 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1492 cfg.fc_flags |= RTF_NONEXTHOP;
1495 ip6_route_add(&cfg);
1498 /* Create "default" multicast route to the interface */
1500 static void addrconf_add_mroute(struct net_device *dev)
1502 struct fib6_config cfg = {
1503 .fc_table = RT6_TABLE_LOCAL,
1504 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1505 .fc_ifindex = dev->ifindex,
1510 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1512 ip6_route_add(&cfg);
1515 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1516 static void sit_route_add(struct net_device *dev)
1518 struct fib6_config cfg = {
1519 .fc_table = RT6_TABLE_MAIN,
1520 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1521 .fc_ifindex = dev->ifindex,
1523 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1526 /* prefix length - 96 bits "::d.d.d.d" */
1527 ip6_route_add(&cfg);
1531 static void addrconf_add_lroute(struct net_device *dev)
1533 struct in6_addr addr;
1535 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1536 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1539 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1541 struct inet6_dev *idev;
1545 if ((idev = ipv6_find_idev(dev)) == NULL)
1548 /* Add default multicast route */
1549 addrconf_add_mroute(dev);
1551 /* Add link local route */
1552 addrconf_add_lroute(dev);
1556 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1558 struct prefix_info *pinfo;
1562 unsigned long rt_expires;
1563 struct inet6_dev *in6_dev;
1565 pinfo = (struct prefix_info *) opt;
1567 if (len < sizeof(struct prefix_info)) {
1568 ADBG(("addrconf: prefix option too short\n"));
1573 * Validation checks ([ADDRCONF], page 19)
1576 addr_type = ipv6_addr_type(&pinfo->prefix);
1578 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1581 valid_lft = ntohl(pinfo->valid);
1582 prefered_lft = ntohl(pinfo->prefered);
1584 if (prefered_lft > valid_lft) {
1585 if (net_ratelimit())
1586 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1590 in6_dev = in6_dev_get(dev);
1592 if (in6_dev == NULL) {
1593 if (net_ratelimit())
1594 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1599 * Two things going on here:
1600 * 1) Add routes for on-link prefixes
1601 * 2) Configure prefixes with the auto flag set
1604 /* Avoid arithmetic overflow. Really, we could
1605 save rt_expires in seconds, likely valid_lft,
1606 but it would require division in fib gc, that it
1609 if (valid_lft >= 0x7FFFFFFF/HZ)
1610 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1612 rt_expires = valid_lft * HZ;
1615 * We convert this (in jiffies) to clock_t later.
1616 * Avoid arithmetic overflow there as well.
1617 * Overflow can happen only if HZ < USER_HZ.
1619 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1620 rt_expires = 0x7FFFFFFF / USER_HZ;
1622 if (pinfo->onlink) {
1623 struct rt6_info *rt;
1624 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1626 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1627 if (rt->rt6i_flags&RTF_EXPIRES) {
1628 if (valid_lft == 0) {
1632 rt->rt6i_expires = jiffies + rt_expires;
1635 } else if (valid_lft) {
1636 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1637 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1640 dst_release(&rt->u.dst);
1643 /* Try to figure out our local address for this prefix */
1645 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1646 struct inet6_ifaddr * ifp;
1647 struct in6_addr addr;
1648 int create = 0, update_lft = 0;
1650 if (pinfo->prefix_len == 64) {
1651 memcpy(&addr, &pinfo->prefix, 8);
1652 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1653 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1654 in6_dev_put(in6_dev);
1659 if (net_ratelimit())
1660 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1662 in6_dev_put(in6_dev);
1667 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1669 if (ifp == NULL && valid_lft) {
1670 int max_addresses = in6_dev->cnf.max_addresses;
1672 /* Do not allow to create too much of autoconfigured
1673 * addresses; this would be too easy way to crash kernel.
1675 if (!max_addresses ||
1676 ipv6_count_addresses(in6_dev) < max_addresses)
1677 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1678 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1680 if (!ifp || IS_ERR(ifp)) {
1681 in6_dev_put(in6_dev);
1685 update_lft = create = 1;
1686 ifp->cstamp = jiffies;
1687 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1693 #ifdef CONFIG_IPV6_PRIVACY
1694 struct inet6_ifaddr *ift;
1698 /* update lifetime (RFC2462 5.5.3 e) */
1699 spin_lock(&ifp->lock);
1701 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1702 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1705 if (!update_lft && stored_lft) {
1706 if (valid_lft > MIN_VALID_LIFETIME ||
1707 valid_lft > stored_lft)
1709 else if (stored_lft <= MIN_VALID_LIFETIME) {
1710 /* valid_lft <= stored_lft is always true */
1714 valid_lft = MIN_VALID_LIFETIME;
1715 if (valid_lft < prefered_lft)
1716 prefered_lft = valid_lft;
1722 ifp->valid_lft = valid_lft;
1723 ifp->prefered_lft = prefered_lft;
1726 ifp->flags &= ~IFA_F_DEPRECATED;
1727 spin_unlock(&ifp->lock);
1729 if (!(flags&IFA_F_TENTATIVE))
1730 ipv6_ifa_notify(0, ifp);
1732 spin_unlock(&ifp->lock);
1734 #ifdef CONFIG_IPV6_PRIVACY
1735 read_lock_bh(&in6_dev->lock);
1736 /* update all temporary addresses in the list */
1737 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1739 * When adjusting the lifetimes of an existing
1740 * temporary address, only lower the lifetimes.
1741 * Implementations must not increase the
1742 * lifetimes of an existing temporary address
1743 * when processing a Prefix Information Option.
1745 spin_lock(&ift->lock);
1747 if (ift->valid_lft > valid_lft &&
1748 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1749 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1750 if (ift->prefered_lft > prefered_lft &&
1751 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1752 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1753 spin_unlock(&ift->lock);
1754 if (!(flags&IFA_F_TENTATIVE))
1755 ipv6_ifa_notify(0, ift);
1758 if (create && in6_dev->cnf.use_tempaddr > 0) {
1760 * When a new public address is created as described in [ADDRCONF],
1761 * also create a new temporary address.
1763 read_unlock_bh(&in6_dev->lock);
1764 ipv6_create_tempaddr(ifp, NULL);
1766 read_unlock_bh(&in6_dev->lock);
1773 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1774 in6_dev_put(in6_dev);
1778 * Set destination address.
1779 * Special case for SIT interfaces where we create a new "virtual"
1782 int addrconf_set_dstaddr(void __user *arg)
1784 struct in6_ifreq ireq;
1785 struct net_device *dev;
1791 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1794 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1800 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1801 if (dev->type == ARPHRD_SIT) {
1804 struct ip_tunnel_parm p;
1806 err = -EADDRNOTAVAIL;
1807 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1810 memset(&p, 0, sizeof(p));
1811 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1815 p.iph.protocol = IPPROTO_IPV6;
1817 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1819 oldfs = get_fs(); set_fs(KERNEL_DS);
1820 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1825 if ((dev = __dev_get_by_name(p.name)) == NULL)
1827 err = dev_open(dev);
1838 * Manual configuration of address on an interface
1840 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1841 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1843 struct inet6_ifaddr *ifp;
1844 struct inet6_dev *idev;
1845 struct net_device *dev;
1847 u32 flags = RTF_EXPIRES;
1851 /* check the lifetime */
1852 if (!valid_lft || prefered_lft > valid_lft)
1855 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1858 if ((idev = addrconf_add_dev(dev)) == NULL)
1861 scope = ipv6_addr_scope(pfx);
1863 if (valid_lft == INFINITY_LIFE_TIME) {
1864 ifa_flags |= IFA_F_PERMANENT;
1866 } else if (valid_lft >= 0x7FFFFFFF/HZ)
1867 valid_lft = 0x7FFFFFFF/HZ;
1869 if (prefered_lft == 0)
1870 ifa_flags |= IFA_F_DEPRECATED;
1871 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1872 (prefered_lft != INFINITY_LIFE_TIME))
1873 prefered_lft = 0x7FFFFFFF/HZ;
1875 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1878 spin_lock_bh(&ifp->lock);
1879 ifp->valid_lft = valid_lft;
1880 ifp->prefered_lft = prefered_lft;
1881 ifp->tstamp = jiffies;
1882 spin_unlock_bh(&ifp->lock);
1884 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1885 jiffies_to_clock_t(valid_lft * HZ), flags);
1886 addrconf_dad_start(ifp, 0);
1892 return PTR_ERR(ifp);
1895 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1897 struct inet6_ifaddr *ifp;
1898 struct inet6_dev *idev;
1899 struct net_device *dev;
1901 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1904 if ((idev = __in6_dev_get(dev)) == NULL)
1907 read_lock_bh(&idev->lock);
1908 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1909 if (ifp->prefix_len == plen &&
1910 ipv6_addr_equal(pfx, &ifp->addr)) {
1912 read_unlock_bh(&idev->lock);
1916 /* If the last address is deleted administratively,
1917 disable IPv6 on this interface.
1919 if (idev->addr_list == NULL)
1920 addrconf_ifdown(idev->dev, 1);
1924 read_unlock_bh(&idev->lock);
1925 return -EADDRNOTAVAIL;
1929 int addrconf_add_ifaddr(void __user *arg)
1931 struct in6_ifreq ireq;
1934 if (!capable(CAP_NET_ADMIN))
1937 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1941 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
1942 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1947 int addrconf_del_ifaddr(void __user *arg)
1949 struct in6_ifreq ireq;
1952 if (!capable(CAP_NET_ADMIN))
1955 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1959 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1964 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1965 static void sit_add_v4_addrs(struct inet6_dev *idev)
1967 struct inet6_ifaddr * ifp;
1968 struct in6_addr addr;
1969 struct net_device *dev;
1974 memset(&addr, 0, sizeof(struct in6_addr));
1975 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1977 if (idev->dev->flags&IFF_POINTOPOINT) {
1978 addr.s6_addr32[0] = htonl(0xfe800000);
1981 scope = IPV6_ADDR_COMPATv4;
1984 if (addr.s6_addr32[3]) {
1985 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1987 spin_lock_bh(&ifp->lock);
1988 ifp->flags &= ~IFA_F_TENTATIVE;
1989 spin_unlock_bh(&ifp->lock);
1990 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1996 for (dev = dev_base; dev != NULL; dev = dev->next) {
1997 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1998 if (in_dev && (dev->flags & IFF_UP)) {
1999 struct in_ifaddr * ifa;
2003 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2006 addr.s6_addr32[3] = ifa->ifa_local;
2008 if (ifa->ifa_scope == RT_SCOPE_LINK)
2010 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2011 if (idev->dev->flags&IFF_POINTOPOINT)
2015 if (idev->dev->flags&IFF_POINTOPOINT)
2020 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2023 spin_lock_bh(&ifp->lock);
2024 ifp->flags &= ~IFA_F_TENTATIVE;
2025 spin_unlock_bh(&ifp->lock);
2026 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2035 static void init_loopback(struct net_device *dev)
2037 struct inet6_dev *idev;
2038 struct inet6_ifaddr * ifp;
2044 if ((idev = ipv6_find_idev(dev)) == NULL) {
2045 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2049 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2051 spin_lock_bh(&ifp->lock);
2052 ifp->flags &= ~IFA_F_TENTATIVE;
2053 spin_unlock_bh(&ifp->lock);
2054 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2059 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2061 struct inet6_ifaddr * ifp;
2063 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2065 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2066 addrconf_dad_start(ifp, 0);
2071 static void addrconf_dev_config(struct net_device *dev)
2073 struct in6_addr addr;
2074 struct inet6_dev * idev;
2078 if ((dev->type != ARPHRD_ETHER) &&
2079 (dev->type != ARPHRD_FDDI) &&
2080 (dev->type != ARPHRD_IEEE802_TR) &&
2081 (dev->type != ARPHRD_ARCNET) &&
2082 (dev->type != ARPHRD_INFINIBAND)) {
2083 /* Alas, we support only Ethernet autoconfiguration. */
2087 idev = addrconf_add_dev(dev);
2091 memset(&addr, 0, sizeof(struct in6_addr));
2092 addr.s6_addr32[0] = htonl(0xFE800000);
2094 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2095 addrconf_add_linklocal(idev, &addr);
2098 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2099 static void addrconf_sit_config(struct net_device *dev)
2101 struct inet6_dev *idev;
2106 * Configure the tunnel with one of our IPv4
2107 * addresses... we should configure all of
2108 * our v4 addrs in the tunnel
2111 if ((idev = ipv6_find_idev(dev)) == NULL) {
2112 printk(KERN_DEBUG "init sit: add_dev failed\n");
2116 sit_add_v4_addrs(idev);
2118 if (dev->flags&IFF_POINTOPOINT) {
2119 addrconf_add_mroute(dev);
2120 addrconf_add_lroute(dev);
2127 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2129 struct in6_addr lladdr;
2131 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2132 addrconf_add_linklocal(idev, &lladdr);
2138 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2140 struct net_device *link_dev;
2142 /* first try to inherit the link-local address from the link device */
2143 if (idev->dev->iflink &&
2144 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2145 if (!ipv6_inherit_linklocal(idev, link_dev))
2148 /* then try to inherit it from any device */
2149 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2150 if (!ipv6_inherit_linklocal(idev, link_dev))
2153 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2157 * Autoconfigure tunnel with a link-local address so routing protocols,
2158 * DHCPv6, MLD etc. can be run over the virtual link
2161 static void addrconf_ip6_tnl_config(struct net_device *dev)
2163 struct inet6_dev *idev;
2167 if ((idev = addrconf_add_dev(dev)) == NULL) {
2168 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2171 ip6_tnl_add_linklocal(idev);
2174 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2177 struct net_device *dev = (struct net_device *) data;
2178 struct inet6_dev *idev = __in6_dev_get(dev);
2179 int run_pending = 0;
2182 case NETDEV_REGISTER:
2184 idev = ipv6_add_dev(dev);
2186 printk(KERN_WARNING "IPv6: add_dev failed for %s\n",
2192 if (event == NETDEV_UP) {
2193 if (!netif_carrier_ok(dev)) {
2194 /* device is not ready yet. */
2196 "ADDRCONF(NETDEV_UP): %s: "
2197 "link is not ready\n",
2203 idev->if_flags |= IF_READY;
2205 if (!netif_carrier_ok(dev)) {
2206 /* device is still not ready. */
2211 if (idev->if_flags & IF_READY) {
2212 /* device is already configured. */
2215 idev->if_flags |= IF_READY;
2219 "ADDRCONF(NETDEV_CHANGE): %s: "
2220 "link becomes ready\n",
2227 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2229 addrconf_sit_config(dev);
2232 case ARPHRD_TUNNEL6:
2233 addrconf_ip6_tnl_config(dev);
2235 case ARPHRD_LOOPBACK:
2240 addrconf_dev_config(dev);
2245 addrconf_dad_run(idev);
2247 /* If the MTU changed during the interface down, when the
2248 interface up, the changed MTU must be reflected in the
2249 idev as well as routers.
2251 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2252 rt6_mtu_change(dev, dev->mtu);
2253 idev->cnf.mtu6 = dev->mtu;
2255 idev->tstamp = jiffies;
2256 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2257 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2258 stop IPv6 on this interface.
2260 if (dev->mtu < IPV6_MIN_MTU)
2261 addrconf_ifdown(dev, event != NETDEV_DOWN);
2265 case NETDEV_CHANGEMTU:
2266 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2267 rt6_mtu_change(dev, dev->mtu);
2268 idev->cnf.mtu6 = dev->mtu;
2272 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2275 case NETDEV_UNREGISTER:
2277 * Remove all addresses from this interface.
2279 addrconf_ifdown(dev, event != NETDEV_DOWN);
2282 case NETDEV_CHANGENAME:
2283 #ifdef CONFIG_SYSCTL
2285 addrconf_sysctl_unregister(&idev->cnf);
2286 neigh_sysctl_unregister(idev->nd_parms);
2287 neigh_sysctl_register(dev, idev->nd_parms,
2288 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2289 &ndisc_ifinfo_sysctl_change,
2291 addrconf_sysctl_register(idev, &idev->cnf);
2301 * addrconf module should be notified of a device going up
2303 static struct notifier_block ipv6_dev_notf = {
2304 .notifier_call = addrconf_notify,
2308 static int addrconf_ifdown(struct net_device *dev, int how)
2310 struct inet6_dev *idev;
2311 struct inet6_ifaddr *ifa, **bifa;
2316 if (dev == &loopback_dev && how == 1)
2320 neigh_ifdown(&nd_tbl, dev);
2322 idev = __in6_dev_get(dev);
2326 /* Step 1: remove reference to ipv6 device from parent device.
2332 /* protected by rtnl_lock */
2333 rcu_assign_pointer(dev->ip6_ptr, NULL);
2335 /* Step 1.5: remove snmp6 entry */
2336 snmp6_unregister_dev(idev);
2340 /* Step 2: clear hash table */
2341 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2342 bifa = &inet6_addr_lst[i];
2344 write_lock_bh(&addrconf_hash_lock);
2345 while ((ifa = *bifa) != NULL) {
2346 if (ifa->idev == idev) {
2347 *bifa = ifa->lst_next;
2348 ifa->lst_next = NULL;
2349 addrconf_del_timer(ifa);
2353 bifa = &ifa->lst_next;
2355 write_unlock_bh(&addrconf_hash_lock);
2358 write_lock_bh(&idev->lock);
2360 /* Step 3: clear flags for stateless addrconf */
2362 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2364 /* Step 4: clear address list */
2365 #ifdef CONFIG_IPV6_PRIVACY
2366 if (how == 1 && del_timer(&idev->regen_timer))
2369 /* clear tempaddr list */
2370 while ((ifa = idev->tempaddr_list) != NULL) {
2371 idev->tempaddr_list = ifa->tmp_next;
2372 ifa->tmp_next = NULL;
2374 write_unlock_bh(&idev->lock);
2375 spin_lock_bh(&ifa->lock);
2378 in6_ifa_put(ifa->ifpub);
2381 spin_unlock_bh(&ifa->lock);
2383 write_lock_bh(&idev->lock);
2386 while ((ifa = idev->addr_list) != NULL) {
2387 idev->addr_list = ifa->if_next;
2388 ifa->if_next = NULL;
2390 addrconf_del_timer(ifa);
2391 write_unlock_bh(&idev->lock);
2393 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2396 write_lock_bh(&idev->lock);
2398 write_unlock_bh(&idev->lock);
2400 /* Step 5: Discard multicast list */
2403 ipv6_mc_destroy_dev(idev);
2407 /* Step 5: netlink notification of this interface */
2408 idev->tstamp = jiffies;
2409 inet6_ifinfo_notify(RTM_DELLINK, idev);
2411 /* Shot the device (if unregistered) */
2414 #ifdef CONFIG_SYSCTL
2415 addrconf_sysctl_unregister(&idev->cnf);
2416 neigh_sysctl_unregister(idev->nd_parms);
2418 neigh_parms_release(&nd_tbl, idev->nd_parms);
2419 neigh_ifdown(&nd_tbl, dev);
2425 static void addrconf_rs_timer(unsigned long data)
2427 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2429 if (ifp->idev->cnf.forwarding)
2432 if (ifp->idev->if_flags & IF_RA_RCVD) {
2434 * Announcement received after solicitation
2440 spin_lock(&ifp->lock);
2441 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2442 struct in6_addr all_routers;
2444 /* The wait after the last probe can be shorter */
2445 addrconf_mod_timer(ifp, AC_RS,
2446 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2447 ifp->idev->cnf.rtr_solicit_delay :
2448 ifp->idev->cnf.rtr_solicit_interval);
2449 spin_unlock(&ifp->lock);
2451 ipv6_addr_all_routers(&all_routers);
2453 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2455 spin_unlock(&ifp->lock);
2457 * Note: we do not support deprecated "all on-link"
2458 * assumption any longer.
2460 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2461 ifp->idev->dev->name);
2469 * Duplicate Address Detection
2471 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2473 unsigned long rand_num;
2474 struct inet6_dev *idev = ifp->idev;
2476 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2477 ifp->probes = idev->cnf.dad_transmits;
2478 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2481 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2483 struct inet6_dev *idev = ifp->idev;
2484 struct net_device *dev = idev->dev;
2486 addrconf_join_solict(dev, &ifp->addr);
2488 net_srandom(ifp->addr.s6_addr32[3]);
2490 read_lock_bh(&idev->lock);
2493 spin_lock_bh(&ifp->lock);
2495 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2496 !(ifp->flags&IFA_F_TENTATIVE) ||
2497 ifp->flags & IFA_F_NODAD) {
2498 ifp->flags &= ~IFA_F_TENTATIVE;
2499 spin_unlock_bh(&ifp->lock);
2500 read_unlock_bh(&idev->lock);
2502 addrconf_dad_completed(ifp);
2506 if (!(idev->if_flags & IF_READY)) {
2507 spin_unlock_bh(&ifp->lock);
2508 read_unlock_bh(&idev->lock);
2510 * If the defice is not ready:
2511 * - keep it tentative if it is a permanent address.
2512 * - otherwise, kill it.
2515 addrconf_dad_stop(ifp);
2518 addrconf_dad_kick(ifp);
2519 spin_unlock_bh(&ifp->lock);
2521 read_unlock_bh(&idev->lock);
2524 static void addrconf_dad_timer(unsigned long data)
2526 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2527 struct inet6_dev *idev = ifp->idev;
2528 struct in6_addr unspec;
2529 struct in6_addr mcaddr;
2531 read_lock_bh(&idev->lock);
2533 read_unlock_bh(&idev->lock);
2536 spin_lock_bh(&ifp->lock);
2537 if (ifp->probes == 0) {
2539 * DAD was successful
2542 ifp->flags &= ~IFA_F_TENTATIVE;
2543 spin_unlock_bh(&ifp->lock);
2544 read_unlock_bh(&idev->lock);
2546 addrconf_dad_completed(ifp);
2552 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2553 spin_unlock_bh(&ifp->lock);
2554 read_unlock_bh(&idev->lock);
2556 /* send a neighbour solicitation for our addr */
2557 memset(&unspec, 0, sizeof(unspec));
2558 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2559 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2564 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2566 struct net_device * dev = ifp->idev->dev;
2569 * Configure the address for reception. Now it is valid.
2572 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2574 /* If added prefix is link local and forwarding is off,
2575 start sending router solicitations.
2578 if (ifp->idev->cnf.forwarding == 0 &&
2579 ifp->idev->cnf.rtr_solicits > 0 &&
2580 (dev->flags&IFF_LOOPBACK) == 0 &&
2581 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2582 struct in6_addr all_routers;
2584 ipv6_addr_all_routers(&all_routers);
2587 * If a host as already performed a random delay
2588 * [...] as part of DAD [...] there is no need
2589 * to delay again before sending the first RS
2591 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2593 spin_lock_bh(&ifp->lock);
2595 ifp->idev->if_flags |= IF_RS_SENT;
2596 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2597 spin_unlock_bh(&ifp->lock);
2601 static void addrconf_dad_run(struct inet6_dev *idev) {
2602 struct inet6_ifaddr *ifp;
2604 read_lock_bh(&idev->lock);
2605 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2606 spin_lock_bh(&ifp->lock);
2607 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2608 spin_unlock_bh(&ifp->lock);
2611 spin_unlock_bh(&ifp->lock);
2612 addrconf_dad_kick(ifp);
2614 read_unlock_bh(&idev->lock);
2617 #ifdef CONFIG_PROC_FS
2618 struct if6_iter_state {
2622 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2624 struct inet6_ifaddr *ifa = NULL;
2625 struct if6_iter_state *state = seq->private;
2627 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2628 ifa = inet6_addr_lst[state->bucket];
2635 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2637 struct if6_iter_state *state = seq->private;
2639 ifa = ifa->lst_next;
2641 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2642 ifa = inet6_addr_lst[state->bucket];
2648 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2650 struct inet6_ifaddr *ifa = if6_get_first(seq);
2653 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2655 return pos ? NULL : ifa;
2658 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2660 read_lock_bh(&addrconf_hash_lock);
2661 return if6_get_idx(seq, *pos);
2664 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2666 struct inet6_ifaddr *ifa;
2668 ifa = if6_get_next(seq, v);
2673 static void if6_seq_stop(struct seq_file *seq, void *v)
2675 read_unlock_bh(&addrconf_hash_lock);
2678 static int if6_seq_show(struct seq_file *seq, void *v)
2680 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2682 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2684 ifp->idev->dev->ifindex,
2688 ifp->idev->dev->name);
2692 static struct seq_operations if6_seq_ops = {
2693 .start = if6_seq_start,
2694 .next = if6_seq_next,
2695 .show = if6_seq_show,
2696 .stop = if6_seq_stop,
2699 static int if6_seq_open(struct inode *inode, struct file *file)
2701 struct seq_file *seq;
2703 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2708 rc = seq_open(file, &if6_seq_ops);
2712 seq = file->private_data;
2721 static const struct file_operations if6_fops = {
2722 .owner = THIS_MODULE,
2723 .open = if6_seq_open,
2725 .llseek = seq_lseek,
2726 .release = seq_release_private,
2729 int __init if6_proc_init(void)
2731 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2736 void if6_proc_exit(void)
2738 proc_net_remove("if_inet6");
2740 #endif /* CONFIG_PROC_FS */
2742 #ifdef CONFIG_IPV6_MIP6
2743 /* Check if address is a home address configured on any interface. */
2744 int ipv6_chk_home_addr(struct in6_addr *addr)
2747 struct inet6_ifaddr * ifp;
2748 u8 hash = ipv6_addr_hash(addr);
2749 read_lock_bh(&addrconf_hash_lock);
2750 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2751 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2752 (ifp->flags & IFA_F_HOMEADDRESS)) {
2757 read_unlock_bh(&addrconf_hash_lock);
2763 * Periodic address status verification
2766 static void addrconf_verify(unsigned long foo)
2768 struct inet6_ifaddr *ifp;
2769 unsigned long now, next;
2772 spin_lock_bh(&addrconf_verify_lock);
2774 next = now + ADDR_CHECK_FREQUENCY;
2776 del_timer(&addr_chk_timer);
2778 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2781 read_lock(&addrconf_hash_lock);
2782 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2784 #ifdef CONFIG_IPV6_PRIVACY
2785 unsigned long regen_advance;
2788 if (ifp->flags & IFA_F_PERMANENT)
2791 spin_lock(&ifp->lock);
2792 age = (now - ifp->tstamp) / HZ;
2794 #ifdef CONFIG_IPV6_PRIVACY
2795 regen_advance = ifp->idev->cnf.regen_max_retry *
2796 ifp->idev->cnf.dad_transmits *
2797 ifp->idev->nd_parms->retrans_time / HZ;
2800 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2801 age >= ifp->valid_lft) {
2802 spin_unlock(&ifp->lock);
2804 read_unlock(&addrconf_hash_lock);
2807 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2808 spin_unlock(&ifp->lock);
2810 } else if (age >= ifp->prefered_lft) {
2811 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2814 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2816 ifp->flags |= IFA_F_DEPRECATED;
2819 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2820 next = ifp->tstamp + ifp->valid_lft * HZ;
2822 spin_unlock(&ifp->lock);
2826 read_unlock(&addrconf_hash_lock);
2828 ipv6_ifa_notify(0, ifp);
2832 #ifdef CONFIG_IPV6_PRIVACY
2833 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2834 !(ifp->flags&IFA_F_TENTATIVE)) {
2835 if (age >= ifp->prefered_lft - regen_advance) {
2836 struct inet6_ifaddr *ifpub = ifp->ifpub;
2837 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2838 next = ifp->tstamp + ifp->prefered_lft * HZ;
2839 if (!ifp->regen_count && ifpub) {
2842 in6_ifa_hold(ifpub);
2843 spin_unlock(&ifp->lock);
2844 read_unlock(&addrconf_hash_lock);
2845 spin_lock(&ifpub->lock);
2846 ifpub->regen_count = 0;
2847 spin_unlock(&ifpub->lock);
2848 ipv6_create_tempaddr(ifpub, ifp);
2853 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2854 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2855 spin_unlock(&ifp->lock);
2858 /* ifp->prefered_lft <= ifp->valid_lft */
2859 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2860 next = ifp->tstamp + ifp->prefered_lft * HZ;
2861 spin_unlock(&ifp->lock);
2864 read_unlock(&addrconf_hash_lock);
2867 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2868 add_timer(&addr_chk_timer);
2869 spin_unlock_bh(&addrconf_verify_lock);
2872 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2874 struct in6_addr *pfx = NULL;
2877 pfx = nla_data(addr);
2880 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2883 pfx = nla_data(local);
2889 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2890 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2891 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2892 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2896 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2898 struct ifaddrmsg *ifm;
2899 struct nlattr *tb[IFA_MAX+1];
2900 struct in6_addr *pfx;
2903 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2907 ifm = nlmsg_data(nlh);
2908 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2912 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2915 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
2916 u32 prefered_lft, u32 valid_lft)
2918 u32 flags = RTF_EXPIRES;
2920 if (!valid_lft || (prefered_lft > valid_lft))
2923 if (valid_lft == INFINITY_LIFE_TIME) {
2924 ifa_flags |= IFA_F_PERMANENT;
2926 } else if (valid_lft >= 0x7FFFFFFF/HZ)
2927 valid_lft = 0x7FFFFFFF/HZ;
2929 if (prefered_lft == 0)
2930 ifa_flags |= IFA_F_DEPRECATED;
2931 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
2932 (prefered_lft != INFINITY_LIFE_TIME))
2933 prefered_lft = 0x7FFFFFFF/HZ;
2935 spin_lock_bh(&ifp->lock);
2936 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
2937 ifp->tstamp = jiffies;
2938 ifp->valid_lft = valid_lft;
2939 ifp->prefered_lft = prefered_lft;
2941 spin_unlock_bh(&ifp->lock);
2942 if (!(ifp->flags&IFA_F_TENTATIVE))
2943 ipv6_ifa_notify(0, ifp);
2945 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
2946 jiffies_to_clock_t(valid_lft * HZ), flags);
2953 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2955 struct ifaddrmsg *ifm;
2956 struct nlattr *tb[IFA_MAX+1];
2957 struct in6_addr *pfx;
2958 struct inet6_ifaddr *ifa;
2959 struct net_device *dev;
2960 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
2964 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2968 ifm = nlmsg_data(nlh);
2969 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
2973 if (tb[IFA_CACHEINFO]) {
2974 struct ifa_cacheinfo *ci;
2976 ci = nla_data(tb[IFA_CACHEINFO]);
2977 valid_lft = ci->ifa_valid;
2978 preferred_lft = ci->ifa_prefered;
2980 preferred_lft = INFINITY_LIFE_TIME;
2981 valid_lft = INFINITY_LIFE_TIME;
2984 dev = __dev_get_by_index(ifm->ifa_index);
2988 /* We ignore other flags so far. */
2989 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
2991 ifa = ipv6_get_ifaddr(pfx, dev, 1);
2994 * It would be best to check for !NLM_F_CREATE here but
2995 * userspace alreay relies on not having to provide this.
2997 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
2998 ifa_flags, preferred_lft, valid_lft);
3001 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3002 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3005 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3012 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3013 u8 scope, int ifindex)
3015 struct ifaddrmsg *ifm;
3017 ifm = nlmsg_data(nlh);
3018 ifm->ifa_family = AF_INET6;
3019 ifm->ifa_prefixlen = prefixlen;
3020 ifm->ifa_flags = flags;
3021 ifm->ifa_scope = scope;
3022 ifm->ifa_index = ifindex;
3025 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3026 unsigned long tstamp, u32 preferred, u32 valid)
3028 struct ifa_cacheinfo ci;
3030 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3031 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3032 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3033 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3034 ci.ifa_prefered = preferred;
3035 ci.ifa_valid = valid;
3037 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3040 static inline int rt_scope(int ifa_scope)
3042 if (ifa_scope & IFA_HOST)
3043 return RT_SCOPE_HOST;
3044 else if (ifa_scope & IFA_LINK)
3045 return RT_SCOPE_LINK;
3046 else if (ifa_scope & IFA_SITE)
3047 return RT_SCOPE_SITE;
3049 return RT_SCOPE_UNIVERSE;
3052 static inline int inet6_ifaddr_msgsize(void)
3054 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3055 + nla_total_size(16) /* IFA_ADDRESS */
3056 + nla_total_size(sizeof(struct ifa_cacheinfo));
3059 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3060 u32 pid, u32 seq, int event, unsigned int flags)
3062 struct nlmsghdr *nlh;
3063 u32 preferred, valid;
3065 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3069 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3070 ifa->idev->dev->ifindex);
3072 if (!(ifa->flags&IFA_F_PERMANENT)) {
3073 preferred = ifa->prefered_lft;
3074 valid = ifa->valid_lft;
3075 if (preferred != INFINITY_LIFE_TIME) {
3076 long tval = (jiffies - ifa->tstamp)/HZ;
3078 if (valid != INFINITY_LIFE_TIME)
3082 preferred = INFINITY_LIFE_TIME;
3083 valid = INFINITY_LIFE_TIME;
3086 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3087 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3088 nlmsg_cancel(skb, nlh);
3092 return nlmsg_end(skb, nlh);
3095 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3096 u32 pid, u32 seq, int event, u16 flags)
3098 struct nlmsghdr *nlh;
3099 u8 scope = RT_SCOPE_UNIVERSE;
3100 int ifindex = ifmca->idev->dev->ifindex;
3102 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3103 scope = RT_SCOPE_SITE;
3105 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3109 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3110 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3111 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3112 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3113 nlmsg_cancel(skb, nlh);
3117 return nlmsg_end(skb, nlh);
3120 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3121 u32 pid, u32 seq, int event, unsigned int flags)
3123 struct nlmsghdr *nlh;
3124 u8 scope = RT_SCOPE_UNIVERSE;
3125 int ifindex = ifaca->aca_idev->dev->ifindex;
3127 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3128 scope = RT_SCOPE_SITE;
3130 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3134 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3135 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3136 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3137 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3138 nlmsg_cancel(skb, nlh);
3142 return nlmsg_end(skb, nlh);
3152 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3153 enum addr_type_t type)
3156 int s_idx, s_ip_idx;
3158 struct net_device *dev;
3159 struct inet6_dev *idev = NULL;
3160 struct inet6_ifaddr *ifa;
3161 struct ifmcaddr6 *ifmca;
3162 struct ifacaddr6 *ifaca;
3164 s_idx = cb->args[0];
3165 s_ip_idx = ip_idx = cb->args[1];
3166 read_lock(&dev_base_lock);
3168 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3174 if ((idev = in6_dev_get(dev)) == NULL)
3176 read_lock_bh(&idev->lock);
3179 /* unicast address incl. temp addr */
3180 for (ifa = idev->addr_list; ifa;
3181 ifa = ifa->if_next, ip_idx++) {
3182 if (ip_idx < s_ip_idx)
3184 if ((err = inet6_fill_ifaddr(skb, ifa,
3185 NETLINK_CB(cb->skb).pid,
3186 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3191 case MULTICAST_ADDR:
3192 /* multicast address */
3193 for (ifmca = idev->mc_list; ifmca;
3194 ifmca = ifmca->next, ip_idx++) {
3195 if (ip_idx < s_ip_idx)
3197 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3198 NETLINK_CB(cb->skb).pid,
3199 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3205 /* anycast address */
3206 for (ifaca = idev->ac_list; ifaca;
3207 ifaca = ifaca->aca_next, ip_idx++) {
3208 if (ip_idx < s_ip_idx)
3210 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3211 NETLINK_CB(cb->skb).pid,
3212 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3220 read_unlock_bh(&idev->lock);
3225 read_unlock_bh(&idev->lock);
3228 read_unlock(&dev_base_lock);
3230 cb->args[1] = ip_idx;
3234 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3236 enum addr_type_t type = UNICAST_ADDR;
3237 return inet6_dump_addr(skb, cb, type);
3240 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3242 enum addr_type_t type = MULTICAST_ADDR;
3243 return inet6_dump_addr(skb, cb, type);
3247 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3249 enum addr_type_t type = ANYCAST_ADDR;
3250 return inet6_dump_addr(skb, cb, type);
3253 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3256 struct ifaddrmsg *ifm;
3257 struct nlattr *tb[IFA_MAX+1];
3258 struct in6_addr *addr = NULL;
3259 struct net_device *dev = NULL;
3260 struct inet6_ifaddr *ifa;
3261 struct sk_buff *skb;
3264 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3268 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3274 ifm = nlmsg_data(nlh);
3276 dev = __dev_get_by_index(ifm->ifa_index);
3278 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3279 err = -EADDRNOTAVAIL;
3283 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3288 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3289 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3291 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3292 WARN_ON(err == -EMSGSIZE);
3296 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3303 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3305 struct sk_buff *skb;
3308 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3312 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3314 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3315 WARN_ON(err == -EMSGSIZE);
3319 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3322 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3325 static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3326 __s32 *array, int bytes)
3328 BUG_ON(bytes < (DEVCONF_MAX * 4));
3330 memset(array, 0, bytes);
3331 array[DEVCONF_FORWARDING] = cnf->forwarding;
3332 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3333 array[DEVCONF_MTU6] = cnf->mtu6;
3334 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3335 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3336 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3337 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3338 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3339 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3340 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3341 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3342 #ifdef CONFIG_IPV6_PRIVACY
3343 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3344 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3345 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3346 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3347 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3349 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3350 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3351 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3352 #ifdef CONFIG_IPV6_ROUTER_PREF
3353 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3354 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3355 #ifdef CONFIG_IPV6_ROUTE_INFO
3356 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3359 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3362 static inline size_t inet6_if_nlmsg_size(void)
3364 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3365 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3366 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3367 + nla_total_size(4) /* IFLA_MTU */
3368 + nla_total_size(4) /* IFLA_LINK */
3369 + nla_total_size( /* IFLA_PROTINFO */
3370 nla_total_size(4) /* IFLA_INET6_FLAGS */
3371 + nla_total_size(sizeof(struct ifla_cacheinfo))
3372 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3376 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3377 u32 pid, u32 seq, int event, unsigned int flags)
3379 struct net_device *dev = idev->dev;
3380 struct nlattr *conf;
3381 struct ifinfomsg *hdr;
3382 struct nlmsghdr *nlh;
3384 struct ifla_cacheinfo ci;
3386 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3390 hdr = nlmsg_data(nlh);
3391 hdr->ifi_family = AF_INET6;
3393 hdr->ifi_type = dev->type;
3394 hdr->ifi_index = dev->ifindex;
3395 hdr->ifi_flags = dev_get_flags(dev);
3396 hdr->ifi_change = 0;
3398 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3401 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3403 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3404 if (dev->ifindex != dev->iflink)
3405 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3407 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3408 if (protoinfo == NULL)
3409 goto nla_put_failure;
3411 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3413 ci.max_reasm_len = IPV6_MAXPLEN;
3414 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3415 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3416 ci.reachable_time = idev->nd_parms->reachable_time;
3417 ci.retrans_time = idev->nd_parms->retrans_time;
3418 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3420 conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3422 goto nla_put_failure;
3423 ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf));
3425 /* XXX - Statistics/MC not implemented */
3427 nla_nest_end(skb, protoinfo);
3428 return nlmsg_end(skb, nlh);
3431 nlmsg_cancel(skb, nlh);
3435 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3438 int s_idx = cb->args[0];
3439 struct net_device *dev;
3440 struct inet6_dev *idev;
3442 read_lock(&dev_base_lock);
3443 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3446 if ((idev = in6_dev_get(dev)) == NULL)
3448 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3449 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3454 read_unlock(&dev_base_lock);
3460 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3462 struct sk_buff *skb;
3465 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3469 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3471 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3472 WARN_ON(err == -EMSGSIZE);
3476 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3479 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3482 static inline size_t inet6_prefix_nlmsg_size(void)
3484 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3485 + nla_total_size(sizeof(struct in6_addr))
3486 + nla_total_size(sizeof(struct prefix_cacheinfo));
3489 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3490 struct prefix_info *pinfo, u32 pid, u32 seq,
3491 int event, unsigned int flags)
3493 struct prefixmsg *pmsg;
3494 struct nlmsghdr *nlh;
3495 struct prefix_cacheinfo ci;
3497 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3501 pmsg = nlmsg_data(nlh);
3502 pmsg->prefix_family = AF_INET6;
3503 pmsg->prefix_pad1 = 0;
3504 pmsg->prefix_pad2 = 0;
3505 pmsg->prefix_ifindex = idev->dev->ifindex;
3506 pmsg->prefix_len = pinfo->prefix_len;
3507 pmsg->prefix_type = pinfo->type;
3508 pmsg->prefix_pad3 = 0;
3509 pmsg->prefix_flags = 0;
3511 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3512 if (pinfo->autoconf)
3513 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3515 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3517 ci.preferred_time = ntohl(pinfo->prefered);
3518 ci.valid_time = ntohl(pinfo->valid);
3519 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3521 return nlmsg_end(skb, nlh);
3524 nlmsg_cancel(skb, nlh);
3528 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3529 struct prefix_info *pinfo)
3531 struct sk_buff *skb;
3534 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3538 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3540 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3541 WARN_ON(err == -EMSGSIZE);
3545 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3548 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3551 static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
3552 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3553 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3554 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3555 [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr,
3556 .dumpit = inet6_dump_ifaddr, },
3557 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3558 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3559 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3560 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3561 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3562 .dumpit = inet6_dump_fib, },
3563 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3564 [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, },
3568 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3570 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3574 ip6_ins_rt(ifp->rt);
3575 if (ifp->idev->cnf.forwarding)
3576 addrconf_join_anycast(ifp);
3579 if (ifp->idev->cnf.forwarding)
3580 addrconf_leave_anycast(ifp);
3581 addrconf_leave_solict(ifp->idev, &ifp->addr);
3582 dst_hold(&ifp->rt->u.dst);
3583 if (ip6_del_rt(ifp->rt))
3584 dst_free(&ifp->rt->u.dst);
3589 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3592 if (likely(ifp->idev->dead == 0))
3593 __ipv6_ifa_notify(event, ifp);
3594 rcu_read_unlock_bh();
3597 #ifdef CONFIG_SYSCTL
3600 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3601 void __user *buffer, size_t *lenp, loff_t *ppos)
3603 int *valp = ctl->data;
3607 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3609 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3610 if (valp != &ipv6_devconf.forwarding) {
3611 if ((!*valp) ^ (!val)) {
3612 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3615 dev_forward_change(idev);
3618 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3619 addrconf_forward_change();
3622 rt6_purge_dflt_routers();
3628 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3629 int __user *name, int nlen,
3630 void __user *oldval,
3631 size_t __user *oldlenp,
3632 void __user *newval, size_t newlen)
3634 int *valp = table->data;
3637 if (!newval || !newlen)
3639 if (newlen != sizeof(int))
3641 if (get_user(new, (int __user *)newval))
3645 if (oldval && oldlenp) {
3647 if (get_user(len, oldlenp))
3650 if (len > table->maxlen)
3651 len = table->maxlen;
3652 if (copy_to_user(oldval, valp, len))
3654 if (put_user(len, oldlenp))
3659 if (valp != &ipv6_devconf_dflt.forwarding) {
3660 if (valp != &ipv6_devconf.forwarding) {
3661 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3663 if (unlikely(idev == NULL))
3665 changed = (!*valp) ^ (!new);
3668 dev_forward_change(idev);
3671 addrconf_forward_change();
3675 rt6_purge_dflt_routers();
3682 static struct addrconf_sysctl_table
3684 struct ctl_table_header *sysctl_header;
3685 ctl_table addrconf_vars[__NET_IPV6_MAX];
3686 ctl_table addrconf_dev[2];
3687 ctl_table addrconf_conf_dir[2];
3688 ctl_table addrconf_proto_dir[2];
3689 ctl_table addrconf_root_dir[2];
3690 } addrconf_sysctl __read_mostly = {
3691 .sysctl_header = NULL,
3694 .ctl_name = NET_IPV6_FORWARDING,
3695 .procname = "forwarding",
3696 .data = &ipv6_devconf.forwarding,
3697 .maxlen = sizeof(int),
3699 .proc_handler = &addrconf_sysctl_forward,
3700 .strategy = &addrconf_sysctl_forward_strategy,
3703 .ctl_name = NET_IPV6_HOP_LIMIT,
3704 .procname = "hop_limit",
3705 .data = &ipv6_devconf.hop_limit,
3706 .maxlen = sizeof(int),
3708 .proc_handler = proc_dointvec,
3711 .ctl_name = NET_IPV6_MTU,
3713 .data = &ipv6_devconf.mtu6,
3714 .maxlen = sizeof(int),
3716 .proc_handler = &proc_dointvec,
3719 .ctl_name = NET_IPV6_ACCEPT_RA,
3720 .procname = "accept_ra",
3721 .data = &ipv6_devconf.accept_ra,
3722 .maxlen = sizeof(int),
3724 .proc_handler = &proc_dointvec,
3727 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3728 .procname = "accept_redirects",
3729 .data = &ipv6_devconf.accept_redirects,
3730 .maxlen = sizeof(int),
3732 .proc_handler = &proc_dointvec,
3735 .ctl_name = NET_IPV6_AUTOCONF,
3736 .procname = "autoconf",
3737 .data = &ipv6_devconf.autoconf,
3738 .maxlen = sizeof(int),
3740 .proc_handler = &proc_dointvec,
3743 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3744 .procname = "dad_transmits",
3745 .data = &ipv6_devconf.dad_transmits,
3746 .maxlen = sizeof(int),
3748 .proc_handler = &proc_dointvec,
3751 .ctl_name = NET_IPV6_RTR_SOLICITS,
3752 .procname = "router_solicitations",
3753 .data = &ipv6_devconf.rtr_solicits,
3754 .maxlen = sizeof(int),
3756 .proc_handler = &proc_dointvec,
3759 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3760 .procname = "router_solicitation_interval",
3761 .data = &ipv6_devconf.rtr_solicit_interval,
3762 .maxlen = sizeof(int),
3764 .proc_handler = &proc_dointvec_jiffies,
3765 .strategy = &sysctl_jiffies,
3768 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3769 .procname = "router_solicitation_delay",
3770 .data = &ipv6_devconf.rtr_solicit_delay,
3771 .maxlen = sizeof(int),
3773 .proc_handler = &proc_dointvec_jiffies,
3774 .strategy = &sysctl_jiffies,
3777 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3778 .procname = "force_mld_version",
3779 .data = &ipv6_devconf.force_mld_version,
3780 .maxlen = sizeof(int),
3782 .proc_handler = &proc_dointvec,
3784 #ifdef CONFIG_IPV6_PRIVACY
3786 .ctl_name = NET_IPV6_USE_TEMPADDR,
3787 .procname = "use_tempaddr",
3788 .data = &ipv6_devconf.use_tempaddr,
3789 .maxlen = sizeof(int),
3791 .proc_handler = &proc_dointvec,
3794 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3795 .procname = "temp_valid_lft",
3796 .data = &ipv6_devconf.temp_valid_lft,
3797 .maxlen = sizeof(int),
3799 .proc_handler = &proc_dointvec,
3802 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3803 .procname = "temp_prefered_lft",
3804 .data = &ipv6_devconf.temp_prefered_lft,
3805 .maxlen = sizeof(int),
3807 .proc_handler = &proc_dointvec,
3810 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3811 .procname = "regen_max_retry",
3812 .data = &ipv6_devconf.regen_max_retry,
3813 .maxlen = sizeof(int),
3815 .proc_handler = &proc_dointvec,
3818 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3819 .procname = "max_desync_factor",
3820 .data = &ipv6_devconf.max_desync_factor,
3821 .maxlen = sizeof(int),
3823 .proc_handler = &proc_dointvec,
3827 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3828 .procname = "max_addresses",
3829 .data = &ipv6_devconf.max_addresses,
3830 .maxlen = sizeof(int),
3832 .proc_handler = &proc_dointvec,
3835 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3836 .procname = "accept_ra_defrtr",
3837 .data = &ipv6_devconf.accept_ra_defrtr,
3838 .maxlen = sizeof(int),
3840 .proc_handler = &proc_dointvec,
3843 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3844 .procname = "accept_ra_pinfo",
3845 .data = &ipv6_devconf.accept_ra_pinfo,
3846 .maxlen = sizeof(int),
3848 .proc_handler = &proc_dointvec,
3850 #ifdef CONFIG_IPV6_ROUTER_PREF
3852 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3853 .procname = "accept_ra_rtr_pref",
3854 .data = &ipv6_devconf.accept_ra_rtr_pref,
3855 .maxlen = sizeof(int),
3857 .proc_handler = &proc_dointvec,
3860 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3861 .procname = "router_probe_interval",
3862 .data = &ipv6_devconf.rtr_probe_interval,
3863 .maxlen = sizeof(int),
3865 .proc_handler = &proc_dointvec_jiffies,
3866 .strategy = &sysctl_jiffies,
3868 #ifdef CONFIG_IPV6_ROUTE_INFO
3870 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3871 .procname = "accept_ra_rt_info_max_plen",
3872 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3873 .maxlen = sizeof(int),
3875 .proc_handler = &proc_dointvec,
3880 .ctl_name = NET_IPV6_PROXY_NDP,
3881 .procname = "proxy_ndp",
3882 .data = &ipv6_devconf.proxy_ndp,
3883 .maxlen = sizeof(int),
3885 .proc_handler = &proc_dointvec,
3888 .ctl_name = 0, /* sentinel */
3893 .ctl_name = NET_PROTO_CONF_ALL,
3896 .child = addrconf_sysctl.addrconf_vars,
3899 .ctl_name = 0, /* sentinel */
3902 .addrconf_conf_dir = {
3904 .ctl_name = NET_IPV6_CONF,
3907 .child = addrconf_sysctl.addrconf_dev,
3910 .ctl_name = 0, /* sentinel */
3913 .addrconf_proto_dir = {
3915 .ctl_name = NET_IPV6,
3918 .child = addrconf_sysctl.addrconf_conf_dir,
3921 .ctl_name = 0, /* sentinel */
3924 .addrconf_root_dir = {
3926 .ctl_name = CTL_NET,
3929 .child = addrconf_sysctl.addrconf_proto_dir,
3932 .ctl_name = 0, /* sentinel */
3937 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3940 struct net_device *dev = idev ? idev->dev : NULL;
3941 struct addrconf_sysctl_table *t;
3942 char *dev_name = NULL;
3944 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
3947 for (i=0; t->addrconf_vars[i].data; i++) {
3948 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3949 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3952 dev_name = dev->name;
3953 t->addrconf_dev[0].ctl_name = dev->ifindex;
3955 dev_name = "default";
3956 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3960 * Make a copy of dev_name, because '.procname' is regarded as const
3961 * by sysctl and we wouldn't want anyone to change it under our feet
3962 * (see SIOCSIFNAME).
3964 dev_name = kstrdup(dev_name, GFP_KERNEL);
3968 t->addrconf_dev[0].procname = dev_name;
3970 t->addrconf_dev[0].child = t->addrconf_vars;
3971 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3972 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3973 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3975 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
3976 if (t->sysctl_header == NULL)
3991 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3994 struct addrconf_sysctl_table *t = p->sysctl;
3996 unregister_sysctl_table(t->sysctl_header);
3997 kfree(t->addrconf_dev[0].procname);
4009 int register_inet6addr_notifier(struct notifier_block *nb)
4011 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4014 int unregister_inet6addr_notifier(struct notifier_block *nb)
4016 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4020 * Init / cleanup code
4023 int __init addrconf_init(void)
4027 /* The addrconf netdev notifier requires that loopback_dev
4028 * has it's ipv6 private information allocated and setup
4029 * before it can bring up and give link-local addresses
4030 * to other devices which are up.
4032 * Unfortunately, loopback_dev is not necessarily the first
4033 * entry in the global dev_base list of net devices. In fact,
4034 * it is likely to be the very last entry on that list.
4035 * So this causes the notifier registry below to try and
4036 * give link-local addresses to all devices besides loopback_dev
4037 * first, then loopback_dev, which cases all the non-loopback_dev
4038 * devices to fail to get a link-local address.
4040 * So, as a temporary fix, allocate the ipv6 structure for
4041 * loopback_dev first by hand.
4042 * Longer term, all of the dependencies ipv6 has upon the loopback
4043 * device and it being up should be removed.
4046 if (!ipv6_add_dev(&loopback_dev))
4052 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4054 register_netdevice_notifier(&ipv6_dev_notf);
4057 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
4058 #ifdef CONFIG_SYSCTL
4059 addrconf_sysctl.sysctl_header =
4060 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
4061 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4067 void __exit addrconf_cleanup(void)
4069 struct net_device *dev;
4070 struct inet6_dev *idev;
4071 struct inet6_ifaddr *ifa;
4074 unregister_netdevice_notifier(&ipv6_dev_notf);
4076 rtnetlink_links[PF_INET6] = NULL;
4077 #ifdef CONFIG_SYSCTL
4078 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4079 addrconf_sysctl_unregister(&ipv6_devconf);
4088 for (dev=dev_base; dev; dev=dev->next) {
4089 if ((idev = __in6_dev_get(dev)) == NULL)
4091 addrconf_ifdown(dev, 1);
4093 addrconf_ifdown(&loopback_dev, 2);
4099 write_lock_bh(&addrconf_hash_lock);
4100 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4101 for (ifa=inet6_addr_lst[i]; ifa; ) {
4102 struct inet6_ifaddr *bifa;
4105 ifa = ifa->lst_next;
4106 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4107 /* Do not free it; something is wrong.
4108 Now we can investigate it with debugger.
4112 write_unlock_bh(&addrconf_hash_lock);
4114 del_timer(&addr_chk_timer);
4118 #ifdef CONFIG_PROC_FS
4119 proc_net_remove("if_inet6");