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>
84 #include <asm/unaligned.h>
86 #include <linux/proc_fs.h>
87 #include <linux/seq_file.h>
89 /* Set to 3 to get tracing... */
93 #define ADBG(x) printk x
98 #define INFINITY_LIFE_TIME 0xFFFFFFFF
99 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
103 static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
106 #ifdef CONFIG_IPV6_PRIVACY
107 static int __ipv6_regen_rndid(struct inet6_dev *idev);
108 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
109 static void ipv6_regen_rndid(unsigned long data);
111 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
114 static int ipv6_count_addresses(struct inet6_dev *idev);
117 * Configured unicast address hash table
119 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
120 static DEFINE_RWLOCK(addrconf_hash_lock);
122 static void addrconf_verify(unsigned long);
124 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
125 static DEFINE_SPINLOCK(addrconf_verify_lock);
127 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
128 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
130 static int addrconf_ifdown(struct net_device *dev, int how);
132 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
133 static void addrconf_dad_timer(unsigned long data);
134 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
135 static void addrconf_dad_run(struct inet6_dev *idev);
136 static void addrconf_rs_timer(unsigned long data);
137 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
138 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
141 struct prefix_info *pinfo);
142 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
144 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
146 struct ipv6_devconf ipv6_devconf __read_mostly = {
148 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
149 .mtu6 = IPV6_MIN_MTU,
151 .accept_redirects = 1,
153 .force_mld_version = 0,
155 .rtr_solicits = MAX_RTR_SOLICITATIONS,
156 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
157 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
158 #ifdef CONFIG_IPV6_PRIVACY
160 .temp_valid_lft = TEMP_VALID_LIFETIME,
161 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
162 .regen_max_retry = REGEN_MAX_RETRY,
163 .max_desync_factor = MAX_DESYNC_FACTOR,
165 .max_addresses = IPV6_MAX_ADDRESSES,
166 .accept_ra_defrtr = 1,
167 .accept_ra_pinfo = 1,
168 #ifdef CONFIG_IPV6_ROUTER_PREF
169 .accept_ra_rtr_pref = 1,
170 .rtr_probe_interval = 60 * HZ,
171 #ifdef CONFIG_IPV6_ROUTE_INFO
172 .accept_ra_rt_info_max_plen = 0,
176 .accept_source_route = 0, /* we do not accept RH0 by default. */
179 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
181 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
182 .mtu6 = IPV6_MIN_MTU,
184 .accept_redirects = 1,
187 .rtr_solicits = MAX_RTR_SOLICITATIONS,
188 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
189 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
190 #ifdef CONFIG_IPV6_PRIVACY
192 .temp_valid_lft = TEMP_VALID_LIFETIME,
193 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
194 .regen_max_retry = REGEN_MAX_RETRY,
195 .max_desync_factor = MAX_DESYNC_FACTOR,
197 .max_addresses = IPV6_MAX_ADDRESSES,
198 .accept_ra_defrtr = 1,
199 .accept_ra_pinfo = 1,
200 #ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref = 1,
202 .rtr_probe_interval = 60 * HZ,
203 #ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen = 0,
208 .accept_source_route = 0, /* we do not accept RH0 by default. */
211 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
213 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
215 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
217 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
219 if (del_timer(&ifp->timer))
223 enum addrconf_timer_t
230 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
231 enum addrconf_timer_t what,
234 if (!del_timer(&ifp->timer))
239 ifp->timer.function = addrconf_dad_timer;
242 ifp->timer.function = addrconf_rs_timer;
246 ifp->timer.expires = jiffies + when;
247 add_timer(&ifp->timer);
250 static int snmp6_alloc_dev(struct inet6_dev *idev)
254 if (!idev || !idev->dev)
257 if (snmp_mib_init((void **)idev->stats.ipv6,
258 sizeof(struct ipstats_mib),
259 __alignof__(struct ipstats_mib)) < 0)
261 if (snmp_mib_init((void **)idev->stats.icmpv6,
262 sizeof(struct icmpv6_mib),
263 __alignof__(struct icmpv6_mib)) < 0)
269 snmp_mib_free((void **)idev->stats.ipv6);
274 static int snmp6_free_dev(struct inet6_dev *idev)
276 snmp_mib_free((void **)idev->stats.icmpv6);
277 snmp_mib_free((void **)idev->stats.ipv6);
281 /* Nobody refers to this device, we may destroy it. */
283 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
285 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
289 void in6_dev_finish_destroy(struct inet6_dev *idev)
291 struct net_device *dev = idev->dev;
292 BUG_TRAP(idev->addr_list==NULL);
293 BUG_TRAP(idev->mc_list==NULL);
294 #ifdef NET_REFCNT_DEBUG
295 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
299 printk("Freeing alive inet6 device %p\n", idev);
302 snmp6_free_dev(idev);
303 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
306 EXPORT_SYMBOL(in6_dev_finish_destroy);
308 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
310 struct inet6_dev *ndev;
311 struct in6_addr maddr;
315 if (dev->mtu < IPV6_MIN_MTU)
318 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
323 rwlock_init(&ndev->lock);
325 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
326 ndev->cnf.mtu6 = dev->mtu;
327 ndev->cnf.sysctl = NULL;
328 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
329 if (ndev->nd_parms == NULL) {
333 /* We refer to the device */
336 if (snmp6_alloc_dev(ndev) < 0) {
338 "%s(): cannot allocate memory for statistics; dev=%s.\n",
339 __FUNCTION__, dev->name));
340 neigh_parms_release(&nd_tbl, ndev->nd_parms);
342 in6_dev_finish_destroy(ndev);
346 if (snmp6_register_dev(ndev) < 0) {
348 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
349 __FUNCTION__, dev->name));
350 neigh_parms_release(&nd_tbl, ndev->nd_parms);
352 in6_dev_finish_destroy(ndev);
356 /* One reference from device. We must do this before
357 * we invoke __ipv6_regen_rndid().
361 #ifdef CONFIG_IPV6_PRIVACY
362 init_timer(&ndev->regen_timer);
363 ndev->regen_timer.function = ipv6_regen_rndid;
364 ndev->regen_timer.data = (unsigned long) ndev;
365 if ((dev->flags&IFF_LOOPBACK) ||
366 dev->type == ARPHRD_TUNNEL ||
367 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
368 dev->type == ARPHRD_SIT ||
370 dev->type == ARPHRD_NONE) {
372 "%s: Disabled Privacy Extensions\n",
374 ndev->cnf.use_tempaddr = -1;
377 ipv6_regen_rndid((unsigned long) ndev);
381 if (netif_running(dev) && netif_carrier_ok(dev))
382 ndev->if_flags |= IF_READY;
384 ipv6_mc_init_dev(ndev);
385 ndev->tstamp = jiffies;
387 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
388 NET_IPV6_NEIGH, "ipv6",
389 &ndisc_ifinfo_sysctl_change,
391 addrconf_sysctl_register(ndev, &ndev->cnf);
393 /* protected by rtnl_lock */
394 rcu_assign_pointer(dev->ip6_ptr, ndev);
396 /* Join all-node multicast group */
397 ipv6_addr_all_nodes(&maddr);
398 ipv6_dev_mc_inc(dev, &maddr);
403 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
405 struct inet6_dev *idev;
409 if ((idev = __in6_dev_get(dev)) == NULL) {
410 if ((idev = ipv6_add_dev(dev)) == NULL)
414 if (dev->flags&IFF_UP)
420 static void dev_forward_change(struct inet6_dev *idev)
422 struct net_device *dev;
423 struct inet6_ifaddr *ifa;
424 struct in6_addr addr;
429 if (dev && (dev->flags & IFF_MULTICAST)) {
430 ipv6_addr_all_routers(&addr);
432 if (idev->cnf.forwarding)
433 ipv6_dev_mc_inc(dev, &addr);
435 ipv6_dev_mc_dec(dev, &addr);
437 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
438 if (ifa->flags&IFA_F_TENTATIVE)
440 if (idev->cnf.forwarding)
441 addrconf_join_anycast(ifa);
443 addrconf_leave_anycast(ifa);
448 static void addrconf_forward_change(void)
450 struct net_device *dev;
451 struct inet6_dev *idev;
453 read_lock(&dev_base_lock);
454 for (dev=dev_base; dev; dev=dev->next) {
456 idev = __in6_dev_get(dev);
458 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
459 idev->cnf.forwarding = ipv6_devconf.forwarding;
461 dev_forward_change(idev);
465 read_unlock(&dev_base_lock);
469 /* Nobody refers to this ifaddr, destroy it */
471 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
473 BUG_TRAP(ifp->if_next==NULL);
474 BUG_TRAP(ifp->lst_next==NULL);
475 #ifdef NET_REFCNT_DEBUG
476 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
479 in6_dev_put(ifp->idev);
481 if (del_timer(&ifp->timer))
482 printk("Timer is still running, when freeing ifa=%p\n", ifp);
485 printk("Freeing alive inet6 address %p\n", ifp);
488 dst_release(&ifp->rt->u.dst);
494 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
496 struct inet6_ifaddr *ifa, **ifap;
497 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
500 * Each device address list is sorted in order of scope -
501 * global before linklocal.
503 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
504 ifap = &ifa->if_next) {
505 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
509 ifp->if_next = *ifap;
513 /* On success it returns ifp with increased reference count */
515 static struct inet6_ifaddr *
516 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
517 int scope, u32 flags)
519 struct inet6_ifaddr *ifa = NULL;
526 err = -ENODEV; /*XXX*/
530 write_lock(&addrconf_hash_lock);
532 /* Ignore adding duplicate addresses on an interface */
533 if (ipv6_chk_same_addr(addr, idev->dev)) {
534 ADBG(("ipv6_add_addr: already assigned\n"));
539 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
542 ADBG(("ipv6_add_addr: malloc failed\n"));
547 rt = addrconf_dst_alloc(idev, addr, 0);
553 ipv6_addr_copy(&ifa->addr, addr);
555 spin_lock_init(&ifa->lock);
556 init_timer(&ifa->timer);
557 ifa->timer.data = (unsigned long) ifa;
559 ifa->prefix_len = pfxlen;
560 ifa->flags = flags | IFA_F_TENTATIVE;
561 ifa->cstamp = ifa->tstamp = jiffies;
566 * part one of RFC 4429, section 3.3
567 * We should not configure an address as
568 * optimistic if we do not yet know the link
569 * layer address of our nexhop router
572 if (rt->rt6i_nexthop == NULL)
573 ifa->flags &= ~IFA_F_OPTIMISTIC;
580 /* Add to big hash table */
581 hash = ipv6_addr_hash(addr);
583 ifa->lst_next = inet6_addr_lst[hash];
584 inet6_addr_lst[hash] = ifa;
586 write_unlock(&addrconf_hash_lock);
588 write_lock(&idev->lock);
589 /* Add to inet6_dev unicast addr list. */
590 ipv6_link_dev_addr(idev, ifa);
592 #ifdef CONFIG_IPV6_PRIVACY
593 if (ifa->flags&IFA_F_TEMPORARY) {
594 ifa->tmp_next = idev->tempaddr_list;
595 idev->tempaddr_list = ifa;
601 write_unlock(&idev->lock);
603 rcu_read_unlock_bh();
605 if (likely(err == 0))
606 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
614 write_unlock(&addrconf_hash_lock);
618 /* This function wants to get referenced ifp and releases it before return */
620 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
622 struct inet6_ifaddr *ifa, **ifap;
623 struct inet6_dev *idev = ifp->idev;
625 int deleted = 0, onlink = 0;
626 unsigned long expires = jiffies;
628 hash = ipv6_addr_hash(&ifp->addr);
632 write_lock_bh(&addrconf_hash_lock);
633 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
634 ifap = &ifa->lst_next) {
636 *ifap = ifa->lst_next;
638 ifa->lst_next = NULL;
642 write_unlock_bh(&addrconf_hash_lock);
644 write_lock_bh(&idev->lock);
645 #ifdef CONFIG_IPV6_PRIVACY
646 if (ifp->flags&IFA_F_TEMPORARY) {
647 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
648 ifap = &ifa->tmp_next) {
650 *ifap = ifa->tmp_next;
652 in6_ifa_put(ifp->ifpub);
656 ifa->tmp_next = NULL;
663 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
665 *ifap = ifa->if_next;
668 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
672 } else if (ifp->flags & IFA_F_PERMANENT) {
673 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
675 if (ifa->flags & IFA_F_PERMANENT) {
680 unsigned long lifetime;
685 spin_lock(&ifa->lock);
686 lifetime = min_t(unsigned long,
687 ifa->valid_lft, 0x7fffffffUL/HZ);
688 if (time_before(expires,
689 ifa->tstamp + lifetime * HZ))
690 expires = ifa->tstamp + lifetime * HZ;
691 spin_unlock(&ifa->lock);
695 ifap = &ifa->if_next;
697 write_unlock_bh(&idev->lock);
699 ipv6_ifa_notify(RTM_DELADDR, ifp);
701 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
703 addrconf_del_timer(ifp);
706 * Purge or update corresponding prefix
708 * 1) we don't purge prefix here if address was not permanent.
709 * prefix is managed by its own lifetime.
710 * 2) if there're no addresses, delete prefix.
711 * 3) if there're still other permanent address(es),
712 * corresponding prefix is still permanent.
713 * 4) otherwise, update prefix lifetime to the
714 * longest valid lifetime among the corresponding
715 * addresses on the device.
716 * Note: subsequent RA will update lifetime.
720 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
721 struct in6_addr prefix;
724 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
725 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
727 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
731 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
732 rt->rt6i_expires = expires;
733 rt->rt6i_flags |= RTF_EXPIRES;
736 dst_release(&rt->u.dst);
742 #ifdef CONFIG_IPV6_PRIVACY
743 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
745 struct inet6_dev *idev = ifp->idev;
746 struct in6_addr addr, *tmpaddr;
747 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
753 write_lock(&idev->lock);
755 spin_lock_bh(&ift->lock);
756 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
757 spin_unlock_bh(&ift->lock);
764 if (idev->cnf.use_tempaddr <= 0) {
765 write_unlock(&idev->lock);
767 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
772 spin_lock_bh(&ifp->lock);
773 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
774 idev->cnf.use_tempaddr = -1; /*XXX*/
775 spin_unlock_bh(&ifp->lock);
776 write_unlock(&idev->lock);
778 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
784 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
785 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
786 spin_unlock_bh(&ifp->lock);
787 write_unlock(&idev->lock);
789 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
795 memcpy(&addr.s6_addr[8], idev->rndid, 8);
796 tmp_valid_lft = min_t(__u32,
798 idev->cnf.temp_valid_lft);
799 tmp_prefered_lft = min_t(__u32,
801 idev->cnf.temp_prefered_lft - desync_factor / HZ);
802 tmp_plen = ifp->prefix_len;
803 max_addresses = idev->cnf.max_addresses;
804 tmp_cstamp = ifp->cstamp;
805 tmp_tstamp = ifp->tstamp;
806 spin_unlock_bh(&ifp->lock);
808 write_unlock(&idev->lock);
810 addr_flags = IFA_F_TEMPORARY;
811 /* set in addrconf_prefix_rcv() */
812 if (ifp->flags & IFA_F_OPTIMISTIC)
813 addr_flags |= IFA_F_OPTIMISTIC;
815 ift = !max_addresses ||
816 ipv6_count_addresses(idev) < max_addresses ?
817 ipv6_add_addr(idev, &addr, tmp_plen,
818 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
820 if (!ift || IS_ERR(ift)) {
824 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
826 write_lock(&idev->lock);
830 spin_lock_bh(&ift->lock);
832 ift->valid_lft = tmp_valid_lft;
833 ift->prefered_lft = tmp_prefered_lft;
834 ift->cstamp = tmp_cstamp;
835 ift->tstamp = tmp_tstamp;
836 spin_unlock_bh(&ift->lock);
838 addrconf_dad_start(ift, 0);
847 * Choose an appropriate source address (RFC3484)
849 struct ipv6_saddr_score {
857 #define IPV6_SADDR_SCORE_LOCAL 0x0001
858 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
859 #define IPV6_SADDR_SCORE_HOA 0x0008
860 #define IPV6_SADDR_SCORE_OIF 0x0010
861 #define IPV6_SADDR_SCORE_LABEL 0x0020
862 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
864 static inline int ipv6_saddr_preferred(int type)
866 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
867 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
872 /* static matching label */
873 static inline int ipv6_saddr_label(const struct in6_addr *addr, int type)
876 * prefix (longest match) label
877 * -----------------------------
886 if (type & IPV6_ADDR_LOOPBACK)
888 else if (type & IPV6_ADDR_COMPATv4)
890 else if (type & IPV6_ADDR_MAPPED)
892 else if (addr->s6_addr32[0] == htonl(0x20010000))
894 else if (addr->s6_addr16[0] == htons(0x2002))
896 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
901 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
902 struct in6_addr *daddr, struct in6_addr *saddr)
904 struct ipv6_saddr_score hiscore;
905 struct inet6_ifaddr *ifa_result = NULL;
906 int daddr_type = __ipv6_addr_type(daddr);
907 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
908 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
909 struct net_device *dev;
911 memset(&hiscore, 0, sizeof(hiscore));
913 read_lock(&dev_base_lock);
916 for (dev = dev_base; dev; dev=dev->next) {
917 struct inet6_dev *idev;
918 struct inet6_ifaddr *ifa;
920 /* Rule 0: Candidate Source Address (section 4)
921 * - multicast and link-local destination address,
922 * the set of candidate source address MUST only
923 * include addresses assigned to interfaces
924 * belonging to the same link as the outgoing
926 * (- For site-local destination addresses, the
927 * set of candidate source addresses MUST only
928 * include addresses assigned to interfaces
929 * belonging to the same site as the outgoing
932 if ((daddr_type & IPV6_ADDR_MULTICAST ||
933 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
934 daddr_dev && dev != daddr_dev)
937 idev = __in6_dev_get(dev);
941 read_lock_bh(&idev->lock);
942 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
943 struct ipv6_saddr_score score;
945 score.addr_type = __ipv6_addr_type(&ifa->addr);
948 * - Tentative Address (RFC2462 section 5.4)
949 * - A tentative address is not considered
950 * "assigned to an interface" in the traditional
951 * sense, unless it is also flagged as optimistic.
952 * - Candidate Source Address (section 4)
953 * - In any case, anycast addresses, multicast
954 * addresses, and the unspecified address MUST
955 * NOT be included in a candidate set.
957 if ((ifa->flags & IFA_F_TENTATIVE) &&
958 (!(ifa->flags & IFA_F_OPTIMISTIC)))
960 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
961 score.addr_type & IPV6_ADDR_MULTICAST)) {
962 LIMIT_NETDEBUG(KERN_DEBUG
963 "ADDRCONF: unspecified / multicast address"
964 "assigned as unicast address on %s",
974 if (ifa_result == NULL) {
975 /* record it if the first available entry */
979 /* Rule 1: Prefer same address */
980 if (hiscore.rule < 1) {
981 if (ipv6_addr_equal(&ifa_result->addr, daddr))
982 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
985 if (ipv6_addr_equal(&ifa->addr, daddr)) {
986 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
987 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
992 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
996 /* Rule 2: Prefer appropriate scope */
997 if (hiscore.rule < 2) {
998 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1001 score.scope = __ipv6_addr_src_scope(score.addr_type);
1002 if (hiscore.scope < score.scope) {
1003 if (hiscore.scope < daddr_scope) {
1008 } else if (score.scope < hiscore.scope) {
1009 if (score.scope < daddr_scope)
1010 break; /* addresses sorted by scope */
1017 /* Rule 3: Avoid deprecated and optimistic addresses */
1018 if (hiscore.rule < 3) {
1019 if (ipv6_saddr_preferred(hiscore.addr_type) ||
1020 (((ifa_result->flags &
1021 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
1022 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1025 if (ipv6_saddr_preferred(score.addr_type) ||
1026 (((ifa_result->flags &
1027 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
1028 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1029 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1034 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1038 /* Rule 4: Prefer home address */
1039 #ifdef CONFIG_IPV6_MIP6
1040 if (hiscore.rule < 4) {
1041 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1042 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1045 if (ifa->flags & IFA_F_HOMEADDRESS) {
1046 score.attrs |= IPV6_SADDR_SCORE_HOA;
1047 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1052 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1056 if (hiscore.rule < 4)
1060 /* Rule 5: Prefer outgoing interface */
1061 if (hiscore.rule < 5) {
1062 if (daddr_dev == NULL ||
1063 daddr_dev == ifa_result->idev->dev)
1064 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1067 if (daddr_dev == NULL ||
1068 daddr_dev == ifa->idev->dev) {
1069 score.attrs |= IPV6_SADDR_SCORE_OIF;
1070 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1075 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1079 /* Rule 6: Prefer matching label */
1080 if (hiscore.rule < 6) {
1081 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1082 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1085 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1086 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1087 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1092 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1096 #ifdef CONFIG_IPV6_PRIVACY
1097 /* Rule 7: Prefer public address
1098 * Note: prefer temprary address if use_tempaddr >= 2
1100 if (hiscore.rule < 7) {
1101 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1102 (ifa_result->idev->cnf.use_tempaddr >= 2))
1103 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1106 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1107 (ifa->idev->cnf.use_tempaddr >= 2)) {
1108 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1109 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1114 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1118 if (hiscore.rule < 7)
1121 /* Rule 8: Use longest matching prefix */
1122 if (hiscore.rule < 8) {
1123 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1126 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1127 if (score.matchlen > hiscore.matchlen) {
1132 else if (score.matchlen < hiscore.matchlen)
1136 /* Final Rule: choose first available one */
1140 in6_ifa_put(ifa_result);
1145 read_unlock_bh(&idev->lock);
1148 read_unlock(&dev_base_lock);
1151 return -EADDRNOTAVAIL;
1153 ipv6_addr_copy(saddr, &ifa_result->addr);
1154 in6_ifa_put(ifa_result);
1159 int ipv6_get_saddr(struct dst_entry *dst,
1160 struct in6_addr *daddr, struct in6_addr *saddr)
1162 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1165 EXPORT_SYMBOL(ipv6_get_saddr);
1167 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1168 unsigned char banned_flags)
1170 struct inet6_dev *idev;
1171 int err = -EADDRNOTAVAIL;
1174 if ((idev = __in6_dev_get(dev)) != NULL) {
1175 struct inet6_ifaddr *ifp;
1177 read_lock_bh(&idev->lock);
1178 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1179 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1180 ipv6_addr_copy(addr, &ifp->addr);
1185 read_unlock_bh(&idev->lock);
1191 static int ipv6_count_addresses(struct inet6_dev *idev)
1194 struct inet6_ifaddr *ifp;
1196 read_lock_bh(&idev->lock);
1197 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1199 read_unlock_bh(&idev->lock);
1203 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1205 struct inet6_ifaddr * ifp;
1206 u8 hash = ipv6_addr_hash(addr);
1208 read_lock_bh(&addrconf_hash_lock);
1209 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1210 if (ipv6_addr_equal(&ifp->addr, addr) &&
1211 !(ifp->flags&IFA_F_TENTATIVE)) {
1212 if (dev == NULL || ifp->idev->dev == dev ||
1213 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1217 read_unlock_bh(&addrconf_hash_lock);
1221 EXPORT_SYMBOL(ipv6_chk_addr);
1224 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1226 struct inet6_ifaddr * ifp;
1227 u8 hash = ipv6_addr_hash(addr);
1229 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1230 if (ipv6_addr_equal(&ifp->addr, addr)) {
1231 if (dev == NULL || ifp->idev->dev == dev)
1238 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1240 struct inet6_ifaddr * ifp;
1241 u8 hash = ipv6_addr_hash(addr);
1243 read_lock_bh(&addrconf_hash_lock);
1244 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1245 if (ipv6_addr_equal(&ifp->addr, addr)) {
1246 if (dev == NULL || ifp->idev->dev == dev ||
1247 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1253 read_unlock_bh(&addrconf_hash_lock);
1258 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1260 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1261 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1262 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1263 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1264 int sk_ipv6only = ipv6_only_sock(sk);
1265 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1266 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1267 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1269 if (!sk2_rcv_saddr && !sk_ipv6only)
1272 if (addr_type2 == IPV6_ADDR_ANY &&
1273 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1276 if (addr_type == IPV6_ADDR_ANY &&
1277 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1280 if (sk2_rcv_saddr6 &&
1281 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1284 if (addr_type == IPV6_ADDR_MAPPED &&
1286 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1292 /* Gets referenced address, destroys ifaddr */
1294 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1296 if (ifp->flags&IFA_F_PERMANENT) {
1297 spin_lock_bh(&ifp->lock);
1298 addrconf_del_timer(ifp);
1299 ifp->flags |= IFA_F_TENTATIVE;
1300 spin_unlock_bh(&ifp->lock);
1302 #ifdef CONFIG_IPV6_PRIVACY
1303 } else if (ifp->flags&IFA_F_TEMPORARY) {
1304 struct inet6_ifaddr *ifpub;
1305 spin_lock_bh(&ifp->lock);
1308 in6_ifa_hold(ifpub);
1309 spin_unlock_bh(&ifp->lock);
1310 ipv6_create_tempaddr(ifpub, ifp);
1313 spin_unlock_bh(&ifp->lock);
1321 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1323 if (net_ratelimit())
1324 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1325 addrconf_dad_stop(ifp);
1328 /* Join to solicited addr multicast group. */
1330 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1332 struct in6_addr maddr;
1334 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1337 addrconf_addr_solict_mult(addr, &maddr);
1338 ipv6_dev_mc_inc(dev, &maddr);
1341 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1343 struct in6_addr maddr;
1345 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1348 addrconf_addr_solict_mult(addr, &maddr);
1349 __ipv6_dev_mc_dec(idev, &maddr);
1352 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1354 struct in6_addr addr;
1355 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1356 if (ipv6_addr_any(&addr))
1358 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1361 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1363 struct in6_addr addr;
1364 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1365 if (ipv6_addr_any(&addr))
1367 __ipv6_dev_ac_dec(ifp->idev, &addr);
1370 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1372 if (dev->addr_len != ETH_ALEN)
1374 memcpy(eui, dev->dev_addr, 3);
1375 memcpy(eui + 5, dev->dev_addr + 3, 3);
1378 * The zSeries OSA network cards can be shared among various
1379 * OS instances, but the OSA cards have only one MAC address.
1380 * This leads to duplicate address conflicts in conjunction
1381 * with IPv6 if more than one instance uses the same card.
1383 * The driver for these cards can deliver a unique 16-bit
1384 * identifier for each instance sharing the same card. It is
1385 * placed instead of 0xFFFE in the interface identifier. The
1386 * "u" bit of the interface identifier is not inverted in this
1387 * case. Hence the resulting interface identifier has local
1388 * scope according to RFC2373.
1391 eui[3] = (dev->dev_id >> 8) & 0xFF;
1392 eui[4] = dev->dev_id & 0xFF;
1401 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1403 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1404 if (dev->addr_len != ARCNET_ALEN)
1407 eui[7] = *(u8*)dev->dev_addr;
1411 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1413 if (dev->addr_len != INFINIBAND_ALEN)
1415 memcpy(eui, dev->dev_addr + 12, 8);
1420 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1422 switch (dev->type) {
1425 case ARPHRD_IEEE802_TR:
1426 return addrconf_ifid_eui48(eui, dev);
1428 return addrconf_ifid_arcnet(eui, dev);
1429 case ARPHRD_INFINIBAND:
1430 return addrconf_ifid_infiniband(eui, dev);
1435 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1438 struct inet6_ifaddr *ifp;
1440 read_lock_bh(&idev->lock);
1441 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1442 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1443 memcpy(eui, ifp->addr.s6_addr+8, 8);
1448 read_unlock_bh(&idev->lock);
1452 #ifdef CONFIG_IPV6_PRIVACY
1453 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1454 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1457 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1458 idev->rndid[0] &= ~0x02;
1461 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1462 * check if generated address is not inappropriate
1464 * - Reserved subnet anycast (RFC 2526)
1465 * 11111101 11....11 1xxxxxxx
1466 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1467 * 00-00-5E-FE-xx-xx-xx-xx
1469 * - XXX: already assigned to an address on the device
1471 if (idev->rndid[0] == 0xfd &&
1472 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1473 (idev->rndid[7]&0x80))
1475 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1476 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1478 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1485 static void ipv6_regen_rndid(unsigned long data)
1487 struct inet6_dev *idev = (struct inet6_dev *) data;
1488 unsigned long expires;
1491 write_lock_bh(&idev->lock);
1496 if (__ipv6_regen_rndid(idev) < 0)
1500 idev->cnf.temp_prefered_lft * HZ -
1501 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1502 if (time_before(expires, jiffies)) {
1504 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1509 if (!mod_timer(&idev->regen_timer, expires))
1513 write_unlock_bh(&idev->lock);
1514 rcu_read_unlock_bh();
1518 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1521 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1522 ret = __ipv6_regen_rndid(idev);
1532 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1533 unsigned long expires, u32 flags)
1535 struct fib6_config cfg = {
1536 .fc_table = RT6_TABLE_PREFIX,
1537 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1538 .fc_ifindex = dev->ifindex,
1539 .fc_expires = expires,
1541 .fc_flags = RTF_UP | flags,
1544 ipv6_addr_copy(&cfg.fc_dst, pfx);
1546 /* Prevent useless cloning on PtP SIT.
1547 This thing is done here expecting that the whole
1548 class of non-broadcast devices need not cloning.
1550 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1551 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1552 cfg.fc_flags |= RTF_NONEXTHOP;
1555 ip6_route_add(&cfg);
1558 /* Create "default" multicast route to the interface */
1560 static void addrconf_add_mroute(struct net_device *dev)
1562 struct fib6_config cfg = {
1563 .fc_table = RT6_TABLE_LOCAL,
1564 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1565 .fc_ifindex = dev->ifindex,
1570 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1572 ip6_route_add(&cfg);
1575 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1576 static void sit_route_add(struct net_device *dev)
1578 struct fib6_config cfg = {
1579 .fc_table = RT6_TABLE_MAIN,
1580 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1581 .fc_ifindex = dev->ifindex,
1583 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1586 /* prefix length - 96 bits "::d.d.d.d" */
1587 ip6_route_add(&cfg);
1591 static void addrconf_add_lroute(struct net_device *dev)
1593 struct in6_addr addr;
1595 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1596 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1599 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1601 struct inet6_dev *idev;
1605 if ((idev = ipv6_find_idev(dev)) == NULL)
1608 /* Add default multicast route */
1609 addrconf_add_mroute(dev);
1611 /* Add link local route */
1612 addrconf_add_lroute(dev);
1616 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1618 struct prefix_info *pinfo;
1622 unsigned long rt_expires;
1623 struct inet6_dev *in6_dev;
1625 pinfo = (struct prefix_info *) opt;
1627 if (len < sizeof(struct prefix_info)) {
1628 ADBG(("addrconf: prefix option too short\n"));
1633 * Validation checks ([ADDRCONF], page 19)
1636 addr_type = ipv6_addr_type(&pinfo->prefix);
1638 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1641 valid_lft = ntohl(pinfo->valid);
1642 prefered_lft = ntohl(pinfo->prefered);
1644 if (prefered_lft > valid_lft) {
1645 if (net_ratelimit())
1646 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1650 in6_dev = in6_dev_get(dev);
1652 if (in6_dev == NULL) {
1653 if (net_ratelimit())
1654 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1659 * Two things going on here:
1660 * 1) Add routes for on-link prefixes
1661 * 2) Configure prefixes with the auto flag set
1664 /* Avoid arithmetic overflow. Really, we could
1665 save rt_expires in seconds, likely valid_lft,
1666 but it would require division in fib gc, that it
1669 if (valid_lft >= 0x7FFFFFFF/HZ)
1670 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1672 rt_expires = valid_lft * HZ;
1675 * We convert this (in jiffies) to clock_t later.
1676 * Avoid arithmetic overflow there as well.
1677 * Overflow can happen only if HZ < USER_HZ.
1679 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1680 rt_expires = 0x7FFFFFFF / USER_HZ;
1682 if (pinfo->onlink) {
1683 struct rt6_info *rt;
1684 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1686 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1687 if (rt->rt6i_flags&RTF_EXPIRES) {
1688 if (valid_lft == 0) {
1692 rt->rt6i_expires = jiffies + rt_expires;
1695 } else if (valid_lft) {
1696 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1697 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1700 dst_release(&rt->u.dst);
1703 /* Try to figure out our local address for this prefix */
1705 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1706 struct inet6_ifaddr * ifp;
1707 struct in6_addr addr;
1708 int create = 0, update_lft = 0;
1710 if (pinfo->prefix_len == 64) {
1711 memcpy(&addr, &pinfo->prefix, 8);
1712 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1713 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1714 in6_dev_put(in6_dev);
1719 if (net_ratelimit())
1720 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1722 in6_dev_put(in6_dev);
1727 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1729 if (ifp == NULL && valid_lft) {
1730 int max_addresses = in6_dev->cnf.max_addresses;
1733 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1734 if (in6_dev->cnf.optimistic_dad &&
1735 !ipv6_devconf.forwarding)
1736 addr_flags = IFA_F_OPTIMISTIC;
1739 /* Do not allow to create too much of autoconfigured
1740 * addresses; this would be too easy way to crash kernel.
1742 if (!max_addresses ||
1743 ipv6_count_addresses(in6_dev) < max_addresses)
1744 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1745 addr_type&IPV6_ADDR_SCOPE_MASK,
1748 if (!ifp || IS_ERR(ifp)) {
1749 in6_dev_put(in6_dev);
1753 update_lft = create = 1;
1754 ifp->cstamp = jiffies;
1755 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1761 #ifdef CONFIG_IPV6_PRIVACY
1762 struct inet6_ifaddr *ift;
1766 /* update lifetime (RFC2462 5.5.3 e) */
1767 spin_lock(&ifp->lock);
1769 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1770 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1773 if (!update_lft && stored_lft) {
1774 if (valid_lft > MIN_VALID_LIFETIME ||
1775 valid_lft > stored_lft)
1777 else if (stored_lft <= MIN_VALID_LIFETIME) {
1778 /* valid_lft <= stored_lft is always true */
1782 valid_lft = MIN_VALID_LIFETIME;
1783 if (valid_lft < prefered_lft)
1784 prefered_lft = valid_lft;
1790 ifp->valid_lft = valid_lft;
1791 ifp->prefered_lft = prefered_lft;
1794 ifp->flags &= ~IFA_F_DEPRECATED;
1795 spin_unlock(&ifp->lock);
1797 if (!(flags&IFA_F_TENTATIVE))
1798 ipv6_ifa_notify(0, ifp);
1800 spin_unlock(&ifp->lock);
1802 #ifdef CONFIG_IPV6_PRIVACY
1803 read_lock_bh(&in6_dev->lock);
1804 /* update all temporary addresses in the list */
1805 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1807 * When adjusting the lifetimes of an existing
1808 * temporary address, only lower the lifetimes.
1809 * Implementations must not increase the
1810 * lifetimes of an existing temporary address
1811 * when processing a Prefix Information Option.
1813 spin_lock(&ift->lock);
1815 if (ift->valid_lft > valid_lft &&
1816 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1817 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1818 if (ift->prefered_lft > prefered_lft &&
1819 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1820 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1821 spin_unlock(&ift->lock);
1822 if (!(flags&IFA_F_TENTATIVE))
1823 ipv6_ifa_notify(0, ift);
1826 if (create && in6_dev->cnf.use_tempaddr > 0) {
1828 * When a new public address is created as described in [ADDRCONF],
1829 * also create a new temporary address.
1831 read_unlock_bh(&in6_dev->lock);
1832 ipv6_create_tempaddr(ifp, NULL);
1834 read_unlock_bh(&in6_dev->lock);
1841 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1842 in6_dev_put(in6_dev);
1846 * Set destination address.
1847 * Special case for SIT interfaces where we create a new "virtual"
1850 int addrconf_set_dstaddr(void __user *arg)
1852 struct in6_ifreq ireq;
1853 struct net_device *dev;
1859 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1862 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1868 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1869 if (dev->type == ARPHRD_SIT) {
1872 struct ip_tunnel_parm p;
1874 err = -EADDRNOTAVAIL;
1875 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1878 memset(&p, 0, sizeof(p));
1879 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1883 p.iph.protocol = IPPROTO_IPV6;
1885 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1887 oldfs = get_fs(); set_fs(KERNEL_DS);
1888 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1893 if ((dev = __dev_get_by_name(p.name)) == NULL)
1895 err = dev_open(dev);
1906 * Manual configuration of address on an interface
1908 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1909 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1911 struct inet6_ifaddr *ifp;
1912 struct inet6_dev *idev;
1913 struct net_device *dev;
1915 u32 flags = RTF_EXPIRES;
1919 /* check the lifetime */
1920 if (!valid_lft || prefered_lft > valid_lft)
1923 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1926 if ((idev = addrconf_add_dev(dev)) == NULL)
1929 scope = ipv6_addr_scope(pfx);
1931 if (valid_lft == INFINITY_LIFE_TIME) {
1932 ifa_flags |= IFA_F_PERMANENT;
1934 } else if (valid_lft >= 0x7FFFFFFF/HZ)
1935 valid_lft = 0x7FFFFFFF/HZ;
1937 if (prefered_lft == 0)
1938 ifa_flags |= IFA_F_DEPRECATED;
1939 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1940 (prefered_lft != INFINITY_LIFE_TIME))
1941 prefered_lft = 0x7FFFFFFF/HZ;
1943 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1946 spin_lock_bh(&ifp->lock);
1947 ifp->valid_lft = valid_lft;
1948 ifp->prefered_lft = prefered_lft;
1949 ifp->tstamp = jiffies;
1950 spin_unlock_bh(&ifp->lock);
1952 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1953 jiffies_to_clock_t(valid_lft * HZ), flags);
1955 * Note that section 3.1 of RFC 4429 indicates
1956 * that the Optimistic flag should not be set for
1957 * manually configured addresses
1959 addrconf_dad_start(ifp, 0);
1965 return PTR_ERR(ifp);
1968 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1970 struct inet6_ifaddr *ifp;
1971 struct inet6_dev *idev;
1972 struct net_device *dev;
1974 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1977 if ((idev = __in6_dev_get(dev)) == NULL)
1980 read_lock_bh(&idev->lock);
1981 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1982 if (ifp->prefix_len == plen &&
1983 ipv6_addr_equal(pfx, &ifp->addr)) {
1985 read_unlock_bh(&idev->lock);
1989 /* If the last address is deleted administratively,
1990 disable IPv6 on this interface.
1992 if (idev->addr_list == NULL)
1993 addrconf_ifdown(idev->dev, 1);
1997 read_unlock_bh(&idev->lock);
1998 return -EADDRNOTAVAIL;
2002 int addrconf_add_ifaddr(void __user *arg)
2004 struct in6_ifreq ireq;
2007 if (!capable(CAP_NET_ADMIN))
2010 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2014 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
2015 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2020 int addrconf_del_ifaddr(void __user *arg)
2022 struct in6_ifreq ireq;
2025 if (!capable(CAP_NET_ADMIN))
2028 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2032 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2037 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2038 static void sit_add_v4_addrs(struct inet6_dev *idev)
2040 struct inet6_ifaddr * ifp;
2041 struct in6_addr addr;
2042 struct net_device *dev;
2047 memset(&addr, 0, sizeof(struct in6_addr));
2048 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2050 if (idev->dev->flags&IFF_POINTOPOINT) {
2051 addr.s6_addr32[0] = htonl(0xfe800000);
2054 scope = IPV6_ADDR_COMPATv4;
2057 if (addr.s6_addr32[3]) {
2058 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2060 spin_lock_bh(&ifp->lock);
2061 ifp->flags &= ~IFA_F_TENTATIVE;
2062 spin_unlock_bh(&ifp->lock);
2063 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2069 for (dev = dev_base; dev != NULL; dev = dev->next) {
2070 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2071 if (in_dev && (dev->flags & IFF_UP)) {
2072 struct in_ifaddr * ifa;
2076 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2079 addr.s6_addr32[3] = ifa->ifa_local;
2081 if (ifa->ifa_scope == RT_SCOPE_LINK)
2083 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2084 if (idev->dev->flags&IFF_POINTOPOINT)
2088 if (idev->dev->flags&IFF_POINTOPOINT)
2093 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2096 spin_lock_bh(&ifp->lock);
2097 ifp->flags &= ~IFA_F_TENTATIVE;
2098 spin_unlock_bh(&ifp->lock);
2099 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2108 static void init_loopback(struct net_device *dev)
2110 struct inet6_dev *idev;
2111 struct inet6_ifaddr * ifp;
2117 if ((idev = ipv6_find_idev(dev)) == NULL) {
2118 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2122 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2124 spin_lock_bh(&ifp->lock);
2125 ifp->flags &= ~IFA_F_TENTATIVE;
2126 spin_unlock_bh(&ifp->lock);
2127 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2132 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2134 struct inet6_ifaddr * ifp;
2135 u32 addr_flags = IFA_F_PERMANENT;
2137 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2138 if (idev->cnf.optimistic_dad &&
2139 !ipv6_devconf.forwarding)
2140 addr_flags |= IFA_F_OPTIMISTIC;
2144 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2146 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2147 addrconf_dad_start(ifp, 0);
2152 static void addrconf_dev_config(struct net_device *dev)
2154 struct in6_addr addr;
2155 struct inet6_dev * idev;
2159 if ((dev->type != ARPHRD_ETHER) &&
2160 (dev->type != ARPHRD_FDDI) &&
2161 (dev->type != ARPHRD_IEEE802_TR) &&
2162 (dev->type != ARPHRD_ARCNET) &&
2163 (dev->type != ARPHRD_INFINIBAND)) {
2164 /* Alas, we support only Ethernet autoconfiguration. */
2168 idev = addrconf_add_dev(dev);
2172 memset(&addr, 0, sizeof(struct in6_addr));
2173 addr.s6_addr32[0] = htonl(0xFE800000);
2175 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2176 addrconf_add_linklocal(idev, &addr);
2179 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2180 static void addrconf_sit_config(struct net_device *dev)
2182 struct inet6_dev *idev;
2187 * Configure the tunnel with one of our IPv4
2188 * addresses... we should configure all of
2189 * our v4 addrs in the tunnel
2192 if ((idev = ipv6_find_idev(dev)) == NULL) {
2193 printk(KERN_DEBUG "init sit: add_dev failed\n");
2197 sit_add_v4_addrs(idev);
2199 if (dev->flags&IFF_POINTOPOINT) {
2200 addrconf_add_mroute(dev);
2201 addrconf_add_lroute(dev);
2208 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2210 struct in6_addr lladdr;
2212 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2213 addrconf_add_linklocal(idev, &lladdr);
2219 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2221 struct net_device *link_dev;
2223 /* first try to inherit the link-local address from the link device */
2224 if (idev->dev->iflink &&
2225 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2226 if (!ipv6_inherit_linklocal(idev, link_dev))
2229 /* then try to inherit it from any device */
2230 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2231 if (!ipv6_inherit_linklocal(idev, link_dev))
2234 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2238 * Autoconfigure tunnel with a link-local address so routing protocols,
2239 * DHCPv6, MLD etc. can be run over the virtual link
2242 static void addrconf_ip6_tnl_config(struct net_device *dev)
2244 struct inet6_dev *idev;
2248 if ((idev = addrconf_add_dev(dev)) == NULL) {
2249 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2252 ip6_tnl_add_linklocal(idev);
2255 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2258 struct net_device *dev = (struct net_device *) data;
2259 struct inet6_dev *idev = __in6_dev_get(dev);
2260 int run_pending = 0;
2263 case NETDEV_REGISTER:
2265 idev = ipv6_add_dev(dev);
2267 printk(KERN_WARNING "IPv6: add_dev failed for %s\n",
2273 if (event == NETDEV_UP) {
2274 if (!netif_carrier_ok(dev)) {
2275 /* device is not ready yet. */
2277 "ADDRCONF(NETDEV_UP): %s: "
2278 "link is not ready\n",
2284 idev->if_flags |= IF_READY;
2286 if (!netif_carrier_ok(dev)) {
2287 /* device is still not ready. */
2292 if (idev->if_flags & IF_READY) {
2293 /* device is already configured. */
2296 idev->if_flags |= IF_READY;
2300 "ADDRCONF(NETDEV_CHANGE): %s: "
2301 "link becomes ready\n",
2308 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2310 addrconf_sit_config(dev);
2313 case ARPHRD_TUNNEL6:
2314 addrconf_ip6_tnl_config(dev);
2316 case ARPHRD_LOOPBACK:
2321 addrconf_dev_config(dev);
2326 addrconf_dad_run(idev);
2328 /* If the MTU changed during the interface down, when the
2329 interface up, the changed MTU must be reflected in the
2330 idev as well as routers.
2332 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2333 rt6_mtu_change(dev, dev->mtu);
2334 idev->cnf.mtu6 = dev->mtu;
2336 idev->tstamp = jiffies;
2337 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2338 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2339 stop IPv6 on this interface.
2341 if (dev->mtu < IPV6_MIN_MTU)
2342 addrconf_ifdown(dev, event != NETDEV_DOWN);
2346 case NETDEV_CHANGEMTU:
2347 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2348 rt6_mtu_change(dev, dev->mtu);
2349 idev->cnf.mtu6 = dev->mtu;
2353 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2356 case NETDEV_UNREGISTER:
2358 * Remove all addresses from this interface.
2360 addrconf_ifdown(dev, event != NETDEV_DOWN);
2363 case NETDEV_CHANGENAME:
2364 #ifdef CONFIG_SYSCTL
2366 addrconf_sysctl_unregister(&idev->cnf);
2367 neigh_sysctl_unregister(idev->nd_parms);
2368 neigh_sysctl_register(dev, idev->nd_parms,
2369 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2370 &ndisc_ifinfo_sysctl_change,
2372 addrconf_sysctl_register(idev, &idev->cnf);
2382 * addrconf module should be notified of a device going up
2384 static struct notifier_block ipv6_dev_notf = {
2385 .notifier_call = addrconf_notify,
2389 static int addrconf_ifdown(struct net_device *dev, int how)
2391 struct inet6_dev *idev;
2392 struct inet6_ifaddr *ifa, **bifa;
2397 if (dev == &loopback_dev && how == 1)
2401 neigh_ifdown(&nd_tbl, dev);
2403 idev = __in6_dev_get(dev);
2407 /* Step 1: remove reference to ipv6 device from parent device.
2413 /* protected by rtnl_lock */
2414 rcu_assign_pointer(dev->ip6_ptr, NULL);
2416 /* Step 1.5: remove snmp6 entry */
2417 snmp6_unregister_dev(idev);
2421 /* Step 2: clear hash table */
2422 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2423 bifa = &inet6_addr_lst[i];
2425 write_lock_bh(&addrconf_hash_lock);
2426 while ((ifa = *bifa) != NULL) {
2427 if (ifa->idev == idev) {
2428 *bifa = ifa->lst_next;
2429 ifa->lst_next = NULL;
2430 addrconf_del_timer(ifa);
2434 bifa = &ifa->lst_next;
2436 write_unlock_bh(&addrconf_hash_lock);
2439 write_lock_bh(&idev->lock);
2441 /* Step 3: clear flags for stateless addrconf */
2443 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2445 /* Step 4: clear address list */
2446 #ifdef CONFIG_IPV6_PRIVACY
2447 if (how == 1 && del_timer(&idev->regen_timer))
2450 /* clear tempaddr list */
2451 while ((ifa = idev->tempaddr_list) != NULL) {
2452 idev->tempaddr_list = ifa->tmp_next;
2453 ifa->tmp_next = NULL;
2455 write_unlock_bh(&idev->lock);
2456 spin_lock_bh(&ifa->lock);
2459 in6_ifa_put(ifa->ifpub);
2462 spin_unlock_bh(&ifa->lock);
2464 write_lock_bh(&idev->lock);
2467 while ((ifa = idev->addr_list) != NULL) {
2468 idev->addr_list = ifa->if_next;
2469 ifa->if_next = NULL;
2471 addrconf_del_timer(ifa);
2472 write_unlock_bh(&idev->lock);
2474 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2477 write_lock_bh(&idev->lock);
2479 write_unlock_bh(&idev->lock);
2481 /* Step 5: Discard multicast list */
2484 ipv6_mc_destroy_dev(idev);
2488 /* Step 5: netlink notification of this interface */
2489 idev->tstamp = jiffies;
2490 inet6_ifinfo_notify(RTM_DELLINK, idev);
2492 /* Shot the device (if unregistered) */
2495 #ifdef CONFIG_SYSCTL
2496 addrconf_sysctl_unregister(&idev->cnf);
2497 neigh_sysctl_unregister(idev->nd_parms);
2499 neigh_parms_release(&nd_tbl, idev->nd_parms);
2500 neigh_ifdown(&nd_tbl, dev);
2506 static void addrconf_rs_timer(unsigned long data)
2508 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2510 if (ifp->idev->cnf.forwarding)
2513 if (ifp->idev->if_flags & IF_RA_RCVD) {
2515 * Announcement received after solicitation
2521 spin_lock(&ifp->lock);
2522 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2523 struct in6_addr all_routers;
2525 /* The wait after the last probe can be shorter */
2526 addrconf_mod_timer(ifp, AC_RS,
2527 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2528 ifp->idev->cnf.rtr_solicit_delay :
2529 ifp->idev->cnf.rtr_solicit_interval);
2530 spin_unlock(&ifp->lock);
2532 ipv6_addr_all_routers(&all_routers);
2534 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2536 spin_unlock(&ifp->lock);
2538 * Note: we do not support deprecated "all on-link"
2539 * assumption any longer.
2541 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2542 ifp->idev->dev->name);
2550 * Duplicate Address Detection
2552 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2554 unsigned long rand_num;
2555 struct inet6_dev *idev = ifp->idev;
2557 if (ifp->flags & IFA_F_OPTIMISTIC)
2560 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2562 ifp->probes = idev->cnf.dad_transmits;
2563 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2566 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2568 struct inet6_dev *idev = ifp->idev;
2569 struct net_device *dev = idev->dev;
2571 addrconf_join_solict(dev, &ifp->addr);
2573 net_srandom(ifp->addr.s6_addr32[3]);
2575 read_lock_bh(&idev->lock);
2578 spin_lock_bh(&ifp->lock);
2580 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2581 !(ifp->flags&IFA_F_TENTATIVE) ||
2582 ifp->flags & IFA_F_NODAD) {
2583 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2584 spin_unlock_bh(&ifp->lock);
2585 read_unlock_bh(&idev->lock);
2587 addrconf_dad_completed(ifp);
2591 if (!(idev->if_flags & IF_READY)) {
2592 spin_unlock_bh(&ifp->lock);
2593 read_unlock_bh(&idev->lock);
2595 * If the defice is not ready:
2596 * - keep it tentative if it is a permanent address.
2597 * - otherwise, kill it.
2600 addrconf_dad_stop(ifp);
2605 * Optimistic nodes can start receiving
2608 if(ifp->flags & IFA_F_OPTIMISTIC)
2609 ip6_ins_rt(ifp->rt);
2611 addrconf_dad_kick(ifp);
2612 spin_unlock_bh(&ifp->lock);
2614 read_unlock_bh(&idev->lock);
2617 static void addrconf_dad_timer(unsigned long data)
2619 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2620 struct inet6_dev *idev = ifp->idev;
2621 struct in6_addr unspec;
2622 struct in6_addr mcaddr;
2624 read_lock_bh(&idev->lock);
2626 read_unlock_bh(&idev->lock);
2629 spin_lock_bh(&ifp->lock);
2630 if (ifp->probes == 0) {
2632 * DAD was successful
2635 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2636 spin_unlock_bh(&ifp->lock);
2637 read_unlock_bh(&idev->lock);
2639 addrconf_dad_completed(ifp);
2645 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2646 spin_unlock_bh(&ifp->lock);
2647 read_unlock_bh(&idev->lock);
2649 /* send a neighbour solicitation for our addr */
2650 memset(&unspec, 0, sizeof(unspec));
2651 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2652 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2657 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2659 struct net_device * dev = ifp->idev->dev;
2662 * Configure the address for reception. Now it is valid.
2665 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2667 /* If added prefix is link local and forwarding is off,
2668 start sending router solicitations.
2671 if (ifp->idev->cnf.forwarding == 0 &&
2672 ifp->idev->cnf.rtr_solicits > 0 &&
2673 (dev->flags&IFF_LOOPBACK) == 0 &&
2674 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2675 struct in6_addr all_routers;
2677 ipv6_addr_all_routers(&all_routers);
2680 * If a host as already performed a random delay
2681 * [...] as part of DAD [...] there is no need
2682 * to delay again before sending the first RS
2684 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2686 spin_lock_bh(&ifp->lock);
2688 ifp->idev->if_flags |= IF_RS_SENT;
2689 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2690 spin_unlock_bh(&ifp->lock);
2694 static void addrconf_dad_run(struct inet6_dev *idev) {
2695 struct inet6_ifaddr *ifp;
2697 read_lock_bh(&idev->lock);
2698 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2699 spin_lock_bh(&ifp->lock);
2700 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2701 spin_unlock_bh(&ifp->lock);
2704 spin_unlock_bh(&ifp->lock);
2705 addrconf_dad_kick(ifp);
2707 read_unlock_bh(&idev->lock);
2710 #ifdef CONFIG_PROC_FS
2711 struct if6_iter_state {
2715 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2717 struct inet6_ifaddr *ifa = NULL;
2718 struct if6_iter_state *state = seq->private;
2720 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2721 ifa = inet6_addr_lst[state->bucket];
2728 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2730 struct if6_iter_state *state = seq->private;
2732 ifa = ifa->lst_next;
2734 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2735 ifa = inet6_addr_lst[state->bucket];
2741 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2743 struct inet6_ifaddr *ifa = if6_get_first(seq);
2746 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2748 return pos ? NULL : ifa;
2751 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2753 read_lock_bh(&addrconf_hash_lock);
2754 return if6_get_idx(seq, *pos);
2757 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2759 struct inet6_ifaddr *ifa;
2761 ifa = if6_get_next(seq, v);
2766 static void if6_seq_stop(struct seq_file *seq, void *v)
2768 read_unlock_bh(&addrconf_hash_lock);
2771 static int if6_seq_show(struct seq_file *seq, void *v)
2773 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2775 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2777 ifp->idev->dev->ifindex,
2781 ifp->idev->dev->name);
2785 static struct seq_operations if6_seq_ops = {
2786 .start = if6_seq_start,
2787 .next = if6_seq_next,
2788 .show = if6_seq_show,
2789 .stop = if6_seq_stop,
2792 static int if6_seq_open(struct inode *inode, struct file *file)
2794 struct seq_file *seq;
2796 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2801 rc = seq_open(file, &if6_seq_ops);
2805 seq = file->private_data;
2814 static const struct file_operations if6_fops = {
2815 .owner = THIS_MODULE,
2816 .open = if6_seq_open,
2818 .llseek = seq_lseek,
2819 .release = seq_release_private,
2822 int __init if6_proc_init(void)
2824 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2829 void if6_proc_exit(void)
2831 proc_net_remove("if_inet6");
2833 #endif /* CONFIG_PROC_FS */
2835 #ifdef CONFIG_IPV6_MIP6
2836 /* Check if address is a home address configured on any interface. */
2837 int ipv6_chk_home_addr(struct in6_addr *addr)
2840 struct inet6_ifaddr * ifp;
2841 u8 hash = ipv6_addr_hash(addr);
2842 read_lock_bh(&addrconf_hash_lock);
2843 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2844 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2845 (ifp->flags & IFA_F_HOMEADDRESS)) {
2850 read_unlock_bh(&addrconf_hash_lock);
2856 * Periodic address status verification
2859 static void addrconf_verify(unsigned long foo)
2861 struct inet6_ifaddr *ifp;
2862 unsigned long now, next;
2865 spin_lock_bh(&addrconf_verify_lock);
2867 next = now + ADDR_CHECK_FREQUENCY;
2869 del_timer(&addr_chk_timer);
2871 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2874 read_lock(&addrconf_hash_lock);
2875 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2877 #ifdef CONFIG_IPV6_PRIVACY
2878 unsigned long regen_advance;
2881 if (ifp->flags & IFA_F_PERMANENT)
2884 spin_lock(&ifp->lock);
2885 age = (now - ifp->tstamp) / HZ;
2887 #ifdef CONFIG_IPV6_PRIVACY
2888 regen_advance = ifp->idev->cnf.regen_max_retry *
2889 ifp->idev->cnf.dad_transmits *
2890 ifp->idev->nd_parms->retrans_time / HZ;
2893 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2894 age >= ifp->valid_lft) {
2895 spin_unlock(&ifp->lock);
2897 read_unlock(&addrconf_hash_lock);
2900 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2901 spin_unlock(&ifp->lock);
2903 } else if (age >= ifp->prefered_lft) {
2904 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2907 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2909 ifp->flags |= IFA_F_DEPRECATED;
2912 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2913 next = ifp->tstamp + ifp->valid_lft * HZ;
2915 spin_unlock(&ifp->lock);
2919 read_unlock(&addrconf_hash_lock);
2921 ipv6_ifa_notify(0, ifp);
2925 #ifdef CONFIG_IPV6_PRIVACY
2926 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2927 !(ifp->flags&IFA_F_TENTATIVE)) {
2928 if (age >= ifp->prefered_lft - regen_advance) {
2929 struct inet6_ifaddr *ifpub = ifp->ifpub;
2930 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2931 next = ifp->tstamp + ifp->prefered_lft * HZ;
2932 if (!ifp->regen_count && ifpub) {
2935 in6_ifa_hold(ifpub);
2936 spin_unlock(&ifp->lock);
2937 read_unlock(&addrconf_hash_lock);
2938 spin_lock(&ifpub->lock);
2939 ifpub->regen_count = 0;
2940 spin_unlock(&ifpub->lock);
2941 ipv6_create_tempaddr(ifpub, ifp);
2946 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2947 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2948 spin_unlock(&ifp->lock);
2951 /* ifp->prefered_lft <= ifp->valid_lft */
2952 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2953 next = ifp->tstamp + ifp->prefered_lft * HZ;
2954 spin_unlock(&ifp->lock);
2957 read_unlock(&addrconf_hash_lock);
2960 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2961 add_timer(&addr_chk_timer);
2962 spin_unlock_bh(&addrconf_verify_lock);
2965 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2967 struct in6_addr *pfx = NULL;
2970 pfx = nla_data(addr);
2973 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2976 pfx = nla_data(local);
2982 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2983 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2984 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2985 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2989 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2991 struct ifaddrmsg *ifm;
2992 struct nlattr *tb[IFA_MAX+1];
2993 struct in6_addr *pfx;
2996 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3000 ifm = nlmsg_data(nlh);
3001 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3005 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3008 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3009 u32 prefered_lft, u32 valid_lft)
3011 u32 flags = RTF_EXPIRES;
3013 if (!valid_lft || (prefered_lft > valid_lft))
3016 if (valid_lft == INFINITY_LIFE_TIME) {
3017 ifa_flags |= IFA_F_PERMANENT;
3019 } else if (valid_lft >= 0x7FFFFFFF/HZ)
3020 valid_lft = 0x7FFFFFFF/HZ;
3022 if (prefered_lft == 0)
3023 ifa_flags |= IFA_F_DEPRECATED;
3024 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3025 (prefered_lft != INFINITY_LIFE_TIME))
3026 prefered_lft = 0x7FFFFFFF/HZ;
3028 spin_lock_bh(&ifp->lock);
3029 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3030 ifp->tstamp = jiffies;
3031 ifp->valid_lft = valid_lft;
3032 ifp->prefered_lft = prefered_lft;
3034 spin_unlock_bh(&ifp->lock);
3035 if (!(ifp->flags&IFA_F_TENTATIVE))
3036 ipv6_ifa_notify(0, ifp);
3038 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3039 jiffies_to_clock_t(valid_lft * HZ), flags);
3046 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3048 struct ifaddrmsg *ifm;
3049 struct nlattr *tb[IFA_MAX+1];
3050 struct in6_addr *pfx;
3051 struct inet6_ifaddr *ifa;
3052 struct net_device *dev;
3053 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3057 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3061 ifm = nlmsg_data(nlh);
3062 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3066 if (tb[IFA_CACHEINFO]) {
3067 struct ifa_cacheinfo *ci;
3069 ci = nla_data(tb[IFA_CACHEINFO]);
3070 valid_lft = ci->ifa_valid;
3071 preferred_lft = ci->ifa_prefered;
3073 preferred_lft = INFINITY_LIFE_TIME;
3074 valid_lft = INFINITY_LIFE_TIME;
3077 dev = __dev_get_by_index(ifm->ifa_index);
3081 /* We ignore other flags so far. */
3082 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3084 ifa = ipv6_get_ifaddr(pfx, dev, 1);
3087 * It would be best to check for !NLM_F_CREATE here but
3088 * userspace alreay relies on not having to provide this.
3090 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
3091 ifa_flags, preferred_lft, valid_lft);
3094 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3095 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3098 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3105 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3106 u8 scope, int ifindex)
3108 struct ifaddrmsg *ifm;
3110 ifm = nlmsg_data(nlh);
3111 ifm->ifa_family = AF_INET6;
3112 ifm->ifa_prefixlen = prefixlen;
3113 ifm->ifa_flags = flags;
3114 ifm->ifa_scope = scope;
3115 ifm->ifa_index = ifindex;
3118 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3119 unsigned long tstamp, u32 preferred, u32 valid)
3121 struct ifa_cacheinfo ci;
3123 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3124 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3125 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3126 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3127 ci.ifa_prefered = preferred;
3128 ci.ifa_valid = valid;
3130 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3133 static inline int rt_scope(int ifa_scope)
3135 if (ifa_scope & IFA_HOST)
3136 return RT_SCOPE_HOST;
3137 else if (ifa_scope & IFA_LINK)
3138 return RT_SCOPE_LINK;
3139 else if (ifa_scope & IFA_SITE)
3140 return RT_SCOPE_SITE;
3142 return RT_SCOPE_UNIVERSE;
3145 static inline int inet6_ifaddr_msgsize(void)
3147 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3148 + nla_total_size(16) /* IFA_ADDRESS */
3149 + nla_total_size(sizeof(struct ifa_cacheinfo));
3152 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3153 u32 pid, u32 seq, int event, unsigned int flags)
3155 struct nlmsghdr *nlh;
3156 u32 preferred, valid;
3158 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3162 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3163 ifa->idev->dev->ifindex);
3165 if (!(ifa->flags&IFA_F_PERMANENT)) {
3166 preferred = ifa->prefered_lft;
3167 valid = ifa->valid_lft;
3168 if (preferred != INFINITY_LIFE_TIME) {
3169 long tval = (jiffies - ifa->tstamp)/HZ;
3171 if (valid != INFINITY_LIFE_TIME)
3175 preferred = INFINITY_LIFE_TIME;
3176 valid = INFINITY_LIFE_TIME;
3179 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3180 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3181 nlmsg_cancel(skb, nlh);
3185 return nlmsg_end(skb, nlh);
3188 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3189 u32 pid, u32 seq, int event, u16 flags)
3191 struct nlmsghdr *nlh;
3192 u8 scope = RT_SCOPE_UNIVERSE;
3193 int ifindex = ifmca->idev->dev->ifindex;
3195 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3196 scope = RT_SCOPE_SITE;
3198 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3202 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3203 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3204 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3205 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3206 nlmsg_cancel(skb, nlh);
3210 return nlmsg_end(skb, nlh);
3213 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3214 u32 pid, u32 seq, int event, unsigned int flags)
3216 struct nlmsghdr *nlh;
3217 u8 scope = RT_SCOPE_UNIVERSE;
3218 int ifindex = ifaca->aca_idev->dev->ifindex;
3220 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3221 scope = RT_SCOPE_SITE;
3223 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3227 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3228 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3229 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3230 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3231 nlmsg_cancel(skb, nlh);
3235 return nlmsg_end(skb, nlh);
3245 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3246 enum addr_type_t type)
3249 int s_idx, s_ip_idx;
3251 struct net_device *dev;
3252 struct inet6_dev *idev = NULL;
3253 struct inet6_ifaddr *ifa;
3254 struct ifmcaddr6 *ifmca;
3255 struct ifacaddr6 *ifaca;
3257 s_idx = cb->args[0];
3258 s_ip_idx = ip_idx = cb->args[1];
3260 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3266 if ((idev = in6_dev_get(dev)) == NULL)
3268 read_lock_bh(&idev->lock);
3271 /* unicast address incl. temp addr */
3272 for (ifa = idev->addr_list; ifa;
3273 ifa = ifa->if_next, ip_idx++) {
3274 if (ip_idx < s_ip_idx)
3276 if ((err = inet6_fill_ifaddr(skb, ifa,
3277 NETLINK_CB(cb->skb).pid,
3278 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3283 case MULTICAST_ADDR:
3284 /* multicast address */
3285 for (ifmca = idev->mc_list; ifmca;
3286 ifmca = ifmca->next, ip_idx++) {
3287 if (ip_idx < s_ip_idx)
3289 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3290 NETLINK_CB(cb->skb).pid,
3291 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3297 /* anycast address */
3298 for (ifaca = idev->ac_list; ifaca;
3299 ifaca = ifaca->aca_next, ip_idx++) {
3300 if (ip_idx < s_ip_idx)
3302 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3303 NETLINK_CB(cb->skb).pid,
3304 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3312 read_unlock_bh(&idev->lock);
3317 read_unlock_bh(&idev->lock);
3321 cb->args[1] = ip_idx;
3325 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3327 enum addr_type_t type = UNICAST_ADDR;
3328 return inet6_dump_addr(skb, cb, type);
3331 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3333 enum addr_type_t type = MULTICAST_ADDR;
3334 return inet6_dump_addr(skb, cb, type);
3338 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3340 enum addr_type_t type = ANYCAST_ADDR;
3341 return inet6_dump_addr(skb, cb, type);
3344 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3347 struct ifaddrmsg *ifm;
3348 struct nlattr *tb[IFA_MAX+1];
3349 struct in6_addr *addr = NULL;
3350 struct net_device *dev = NULL;
3351 struct inet6_ifaddr *ifa;
3352 struct sk_buff *skb;
3355 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3359 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3365 ifm = nlmsg_data(nlh);
3367 dev = __dev_get_by_index(ifm->ifa_index);
3369 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3370 err = -EADDRNOTAVAIL;
3374 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3379 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3380 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3382 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3383 WARN_ON(err == -EMSGSIZE);
3387 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3394 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3396 struct sk_buff *skb;
3399 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3403 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3405 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3406 WARN_ON(err == -EMSGSIZE);
3410 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3413 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3416 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3417 __s32 *array, int bytes)
3419 BUG_ON(bytes < (DEVCONF_MAX * 4));
3421 memset(array, 0, bytes);
3422 array[DEVCONF_FORWARDING] = cnf->forwarding;
3423 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3424 array[DEVCONF_MTU6] = cnf->mtu6;
3425 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3426 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3427 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3428 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3429 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3430 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3431 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3432 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3433 #ifdef CONFIG_IPV6_PRIVACY
3434 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3435 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3436 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3437 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3438 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3440 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3441 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3442 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3443 #ifdef CONFIG_IPV6_ROUTER_PREF
3444 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3445 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3446 #ifdef CONFIG_IPV6_ROUTE_INFO
3447 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3450 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3451 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3452 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3453 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3457 static inline size_t inet6_if_nlmsg_size(void)
3459 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3460 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3461 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3462 + nla_total_size(4) /* IFLA_MTU */
3463 + nla_total_size(4) /* IFLA_LINK */
3464 + nla_total_size( /* IFLA_PROTINFO */
3465 nla_total_size(4) /* IFLA_INET6_FLAGS */
3466 + nla_total_size(sizeof(struct ifla_cacheinfo))
3467 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3468 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3469 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3473 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3477 int pad = bytes - sizeof(u64) * items;
3480 /* Use put_unaligned() because stats may not be aligned for u64. */
3481 put_unaligned(items, &stats[0]);
3482 for (i = 1; i < items; i++)
3483 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3485 memset(&stats[items], 0, pad);
3488 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3492 case IFLA_INET6_STATS:
3493 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3495 case IFLA_INET6_ICMP6STATS:
3496 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3501 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3502 u32 pid, u32 seq, int event, unsigned int flags)
3504 struct net_device *dev = idev->dev;
3506 struct ifinfomsg *hdr;
3507 struct nlmsghdr *nlh;
3509 struct ifla_cacheinfo ci;
3511 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3515 hdr = nlmsg_data(nlh);
3516 hdr->ifi_family = AF_INET6;
3518 hdr->ifi_type = dev->type;
3519 hdr->ifi_index = dev->ifindex;
3520 hdr->ifi_flags = dev_get_flags(dev);
3521 hdr->ifi_change = 0;
3523 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3526 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3528 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3529 if (dev->ifindex != dev->iflink)
3530 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3532 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3533 if (protoinfo == NULL)
3534 goto nla_put_failure;
3536 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3538 ci.max_reasm_len = IPV6_MAXPLEN;
3539 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3540 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3541 ci.reachable_time = idev->nd_parms->reachable_time;
3542 ci.retrans_time = idev->nd_parms->retrans_time;
3543 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3545 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3547 goto nla_put_failure;
3548 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3550 /* XXX - MC not implemented */
3552 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3554 goto nla_put_failure;
3555 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3557 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3559 goto nla_put_failure;
3560 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3562 nla_nest_end(skb, protoinfo);
3563 return nlmsg_end(skb, nlh);
3566 nlmsg_cancel(skb, nlh);
3570 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3573 int s_idx = cb->args[0];
3574 struct net_device *dev;
3575 struct inet6_dev *idev;
3577 read_lock(&dev_base_lock);
3578 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3581 if ((idev = in6_dev_get(dev)) == NULL)
3583 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3584 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3589 read_unlock(&dev_base_lock);
3595 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3597 struct sk_buff *skb;
3600 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3604 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3606 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3607 WARN_ON(err == -EMSGSIZE);
3611 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3614 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3617 static inline size_t inet6_prefix_nlmsg_size(void)
3619 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3620 + nla_total_size(sizeof(struct in6_addr))
3621 + nla_total_size(sizeof(struct prefix_cacheinfo));
3624 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3625 struct prefix_info *pinfo, u32 pid, u32 seq,
3626 int event, unsigned int flags)
3628 struct prefixmsg *pmsg;
3629 struct nlmsghdr *nlh;
3630 struct prefix_cacheinfo ci;
3632 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3636 pmsg = nlmsg_data(nlh);
3637 pmsg->prefix_family = AF_INET6;
3638 pmsg->prefix_pad1 = 0;
3639 pmsg->prefix_pad2 = 0;
3640 pmsg->prefix_ifindex = idev->dev->ifindex;
3641 pmsg->prefix_len = pinfo->prefix_len;
3642 pmsg->prefix_type = pinfo->type;
3643 pmsg->prefix_pad3 = 0;
3644 pmsg->prefix_flags = 0;
3646 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3647 if (pinfo->autoconf)
3648 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3650 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3652 ci.preferred_time = ntohl(pinfo->prefered);
3653 ci.valid_time = ntohl(pinfo->valid);
3654 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3656 return nlmsg_end(skb, nlh);
3659 nlmsg_cancel(skb, nlh);
3663 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3664 struct prefix_info *pinfo)
3666 struct sk_buff *skb;
3669 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3673 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3675 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3676 WARN_ON(err == -EMSGSIZE);
3680 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3683 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3686 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3688 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3693 * If the address was optimistic
3694 * we inserted the route at the start of
3695 * our DAD process, so we don't need
3698 if (!(ifp->rt->rt6i_node))
3699 ip6_ins_rt(ifp->rt);
3700 if (ifp->idev->cnf.forwarding)
3701 addrconf_join_anycast(ifp);
3704 if (ifp->idev->cnf.forwarding)
3705 addrconf_leave_anycast(ifp);
3706 addrconf_leave_solict(ifp->idev, &ifp->addr);
3707 dst_hold(&ifp->rt->u.dst);
3708 if (ip6_del_rt(ifp->rt))
3709 dst_free(&ifp->rt->u.dst);
3714 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3717 if (likely(ifp->idev->dead == 0))
3718 __ipv6_ifa_notify(event, ifp);
3719 rcu_read_unlock_bh();
3722 #ifdef CONFIG_SYSCTL
3725 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3726 void __user *buffer, size_t *lenp, loff_t *ppos)
3728 int *valp = ctl->data;
3732 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3734 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3735 if (valp != &ipv6_devconf.forwarding) {
3736 if ((!*valp) ^ (!val)) {
3737 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3740 dev_forward_change(idev);
3743 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3744 addrconf_forward_change();
3747 rt6_purge_dflt_routers();
3753 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3754 int __user *name, int nlen,
3755 void __user *oldval,
3756 size_t __user *oldlenp,
3757 void __user *newval, size_t newlen)
3759 int *valp = table->data;
3762 if (!newval || !newlen)
3764 if (newlen != sizeof(int))
3766 if (get_user(new, (int __user *)newval))
3770 if (oldval && oldlenp) {
3772 if (get_user(len, oldlenp))
3775 if (len > table->maxlen)
3776 len = table->maxlen;
3777 if (copy_to_user(oldval, valp, len))
3779 if (put_user(len, oldlenp))
3784 if (valp != &ipv6_devconf_dflt.forwarding) {
3785 if (valp != &ipv6_devconf.forwarding) {
3786 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3788 if (unlikely(idev == NULL))
3790 changed = (!*valp) ^ (!new);
3793 dev_forward_change(idev);
3796 addrconf_forward_change();
3800 rt6_purge_dflt_routers();
3807 static struct addrconf_sysctl_table
3809 struct ctl_table_header *sysctl_header;
3810 ctl_table addrconf_vars[__NET_IPV6_MAX];
3811 ctl_table addrconf_dev[2];
3812 ctl_table addrconf_conf_dir[2];
3813 ctl_table addrconf_proto_dir[2];
3814 ctl_table addrconf_root_dir[2];
3815 } addrconf_sysctl __read_mostly = {
3816 .sysctl_header = NULL,
3819 .ctl_name = NET_IPV6_FORWARDING,
3820 .procname = "forwarding",
3821 .data = &ipv6_devconf.forwarding,
3822 .maxlen = sizeof(int),
3824 .proc_handler = &addrconf_sysctl_forward,
3825 .strategy = &addrconf_sysctl_forward_strategy,
3828 .ctl_name = NET_IPV6_HOP_LIMIT,
3829 .procname = "hop_limit",
3830 .data = &ipv6_devconf.hop_limit,
3831 .maxlen = sizeof(int),
3833 .proc_handler = proc_dointvec,
3836 .ctl_name = NET_IPV6_MTU,
3838 .data = &ipv6_devconf.mtu6,
3839 .maxlen = sizeof(int),
3841 .proc_handler = &proc_dointvec,
3844 .ctl_name = NET_IPV6_ACCEPT_RA,
3845 .procname = "accept_ra",
3846 .data = &ipv6_devconf.accept_ra,
3847 .maxlen = sizeof(int),
3849 .proc_handler = &proc_dointvec,
3852 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3853 .procname = "accept_redirects",
3854 .data = &ipv6_devconf.accept_redirects,
3855 .maxlen = sizeof(int),
3857 .proc_handler = &proc_dointvec,
3860 .ctl_name = NET_IPV6_AUTOCONF,
3861 .procname = "autoconf",
3862 .data = &ipv6_devconf.autoconf,
3863 .maxlen = sizeof(int),
3865 .proc_handler = &proc_dointvec,
3868 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3869 .procname = "dad_transmits",
3870 .data = &ipv6_devconf.dad_transmits,
3871 .maxlen = sizeof(int),
3873 .proc_handler = &proc_dointvec,
3876 .ctl_name = NET_IPV6_RTR_SOLICITS,
3877 .procname = "router_solicitations",
3878 .data = &ipv6_devconf.rtr_solicits,
3879 .maxlen = sizeof(int),
3881 .proc_handler = &proc_dointvec,
3884 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3885 .procname = "router_solicitation_interval",
3886 .data = &ipv6_devconf.rtr_solicit_interval,
3887 .maxlen = sizeof(int),
3889 .proc_handler = &proc_dointvec_jiffies,
3890 .strategy = &sysctl_jiffies,
3893 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3894 .procname = "router_solicitation_delay",
3895 .data = &ipv6_devconf.rtr_solicit_delay,
3896 .maxlen = sizeof(int),
3898 .proc_handler = &proc_dointvec_jiffies,
3899 .strategy = &sysctl_jiffies,
3902 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3903 .procname = "force_mld_version",
3904 .data = &ipv6_devconf.force_mld_version,
3905 .maxlen = sizeof(int),
3907 .proc_handler = &proc_dointvec,
3909 #ifdef CONFIG_IPV6_PRIVACY
3911 .ctl_name = NET_IPV6_USE_TEMPADDR,
3912 .procname = "use_tempaddr",
3913 .data = &ipv6_devconf.use_tempaddr,
3914 .maxlen = sizeof(int),
3916 .proc_handler = &proc_dointvec,
3919 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3920 .procname = "temp_valid_lft",
3921 .data = &ipv6_devconf.temp_valid_lft,
3922 .maxlen = sizeof(int),
3924 .proc_handler = &proc_dointvec,
3927 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3928 .procname = "temp_prefered_lft",
3929 .data = &ipv6_devconf.temp_prefered_lft,
3930 .maxlen = sizeof(int),
3932 .proc_handler = &proc_dointvec,
3935 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3936 .procname = "regen_max_retry",
3937 .data = &ipv6_devconf.regen_max_retry,
3938 .maxlen = sizeof(int),
3940 .proc_handler = &proc_dointvec,
3943 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3944 .procname = "max_desync_factor",
3945 .data = &ipv6_devconf.max_desync_factor,
3946 .maxlen = sizeof(int),
3948 .proc_handler = &proc_dointvec,
3952 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3953 .procname = "max_addresses",
3954 .data = &ipv6_devconf.max_addresses,
3955 .maxlen = sizeof(int),
3957 .proc_handler = &proc_dointvec,
3960 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3961 .procname = "accept_ra_defrtr",
3962 .data = &ipv6_devconf.accept_ra_defrtr,
3963 .maxlen = sizeof(int),
3965 .proc_handler = &proc_dointvec,
3968 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3969 .procname = "accept_ra_pinfo",
3970 .data = &ipv6_devconf.accept_ra_pinfo,
3971 .maxlen = sizeof(int),
3973 .proc_handler = &proc_dointvec,
3975 #ifdef CONFIG_IPV6_ROUTER_PREF
3977 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3978 .procname = "accept_ra_rtr_pref",
3979 .data = &ipv6_devconf.accept_ra_rtr_pref,
3980 .maxlen = sizeof(int),
3982 .proc_handler = &proc_dointvec,
3985 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3986 .procname = "router_probe_interval",
3987 .data = &ipv6_devconf.rtr_probe_interval,
3988 .maxlen = sizeof(int),
3990 .proc_handler = &proc_dointvec_jiffies,
3991 .strategy = &sysctl_jiffies,
3993 #ifdef CONFIG_IPV6_ROUTE_INFO
3995 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3996 .procname = "accept_ra_rt_info_max_plen",
3997 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3998 .maxlen = sizeof(int),
4000 .proc_handler = &proc_dointvec,
4005 .ctl_name = NET_IPV6_PROXY_NDP,
4006 .procname = "proxy_ndp",
4007 .data = &ipv6_devconf.proxy_ndp,
4008 .maxlen = sizeof(int),
4010 .proc_handler = &proc_dointvec,
4013 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4014 .procname = "accept_source_route",
4015 .data = &ipv6_devconf.accept_source_route,
4016 .maxlen = sizeof(int),
4018 .proc_handler = &proc_dointvec,
4020 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4022 .ctl_name = CTL_UNNUMBERED,
4023 .procname = "optimistic_dad",
4024 .data = &ipv6_devconf.optimistic_dad,
4025 .maxlen = sizeof(int),
4027 .proc_handler = &proc_dointvec,
4032 .ctl_name = 0, /* sentinel */
4037 .ctl_name = NET_PROTO_CONF_ALL,
4040 .child = addrconf_sysctl.addrconf_vars,
4043 .ctl_name = 0, /* sentinel */
4046 .addrconf_conf_dir = {
4048 .ctl_name = NET_IPV6_CONF,
4051 .child = addrconf_sysctl.addrconf_dev,
4054 .ctl_name = 0, /* sentinel */
4057 .addrconf_proto_dir = {
4059 .ctl_name = NET_IPV6,
4062 .child = addrconf_sysctl.addrconf_conf_dir,
4065 .ctl_name = 0, /* sentinel */
4068 .addrconf_root_dir = {
4070 .ctl_name = CTL_NET,
4073 .child = addrconf_sysctl.addrconf_proto_dir,
4076 .ctl_name = 0, /* sentinel */
4081 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
4084 struct net_device *dev = idev ? idev->dev : NULL;
4085 struct addrconf_sysctl_table *t;
4086 char *dev_name = NULL;
4088 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4091 for (i=0; t->addrconf_vars[i].data; i++) {
4092 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4093 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4096 dev_name = dev->name;
4097 t->addrconf_dev[0].ctl_name = dev->ifindex;
4099 dev_name = "default";
4100 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
4104 * Make a copy of dev_name, because '.procname' is regarded as const
4105 * by sysctl and we wouldn't want anyone to change it under our feet
4106 * (see SIOCSIFNAME).
4108 dev_name = kstrdup(dev_name, GFP_KERNEL);
4112 t->addrconf_dev[0].procname = dev_name;
4114 t->addrconf_dev[0].child = t->addrconf_vars;
4115 t->addrconf_conf_dir[0].child = t->addrconf_dev;
4116 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
4117 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
4119 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
4120 if (t->sysctl_header == NULL)
4135 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
4138 struct addrconf_sysctl_table *t = p->sysctl;
4140 unregister_sysctl_table(t->sysctl_header);
4141 kfree(t->addrconf_dev[0].procname);
4153 int register_inet6addr_notifier(struct notifier_block *nb)
4155 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4158 EXPORT_SYMBOL(register_inet6addr_notifier);
4160 int unregister_inet6addr_notifier(struct notifier_block *nb)
4162 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4165 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4168 * Init / cleanup code
4171 int __init addrconf_init(void)
4175 /* The addrconf netdev notifier requires that loopback_dev
4176 * has it's ipv6 private information allocated and setup
4177 * before it can bring up and give link-local addresses
4178 * to other devices which are up.
4180 * Unfortunately, loopback_dev is not necessarily the first
4181 * entry in the global dev_base list of net devices. In fact,
4182 * it is likely to be the very last entry on that list.
4183 * So this causes the notifier registry below to try and
4184 * give link-local addresses to all devices besides loopback_dev
4185 * first, then loopback_dev, which cases all the non-loopback_dev
4186 * devices to fail to get a link-local address.
4188 * So, as a temporary fix, allocate the ipv6 structure for
4189 * loopback_dev first by hand.
4190 * Longer term, all of the dependencies ipv6 has upon the loopback
4191 * device and it being up should be removed.
4194 if (!ipv6_add_dev(&loopback_dev))
4200 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4202 register_netdevice_notifier(&ipv6_dev_notf);
4206 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4210 /* Only the first call to __rtnl_register can fail */
4211 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4212 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4213 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4214 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4215 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4217 #ifdef CONFIG_SYSCTL
4218 addrconf_sysctl.sysctl_header =
4219 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
4220 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4225 unregister_netdevice_notifier(&ipv6_dev_notf);
4230 void __exit addrconf_cleanup(void)
4232 struct net_device *dev;
4233 struct inet6_dev *idev;
4234 struct inet6_ifaddr *ifa;
4237 unregister_netdevice_notifier(&ipv6_dev_notf);
4239 #ifdef CONFIG_SYSCTL
4240 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4241 addrconf_sysctl_unregister(&ipv6_devconf);
4250 for (dev=dev_base; dev; dev=dev->next) {
4251 if ((idev = __in6_dev_get(dev)) == NULL)
4253 addrconf_ifdown(dev, 1);
4255 addrconf_ifdown(&loopback_dev, 2);
4261 write_lock_bh(&addrconf_hash_lock);
4262 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4263 for (ifa=inet6_addr_lst[i]; ifa; ) {
4264 struct inet6_ifaddr *bifa;
4267 ifa = ifa->lst_next;
4268 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4269 /* Do not free it; something is wrong.
4270 Now we can investigate it with debugger.
4274 write_unlock_bh(&addrconf_hash_lock);
4276 del_timer(&addr_chk_timer);
4280 #ifdef CONFIG_PROC_FS
4281 proc_net_remove("if_inet6");