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 */
212 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
213 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
215 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
217 if (del_timer(&ifp->timer))
221 enum addrconf_timer_t
228 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
229 enum addrconf_timer_t what,
232 if (!del_timer(&ifp->timer))
237 ifp->timer.function = addrconf_dad_timer;
240 ifp->timer.function = addrconf_rs_timer;
244 ifp->timer.expires = jiffies + when;
245 add_timer(&ifp->timer);
248 static int snmp6_alloc_dev(struct inet6_dev *idev)
252 if (!idev || !idev->dev)
255 if (snmp_mib_init((void **)idev->stats.ipv6,
256 sizeof(struct ipstats_mib),
257 __alignof__(struct ipstats_mib)) < 0)
259 if (snmp_mib_init((void **)idev->stats.icmpv6,
260 sizeof(struct icmpv6_mib),
261 __alignof__(struct icmpv6_mib)) < 0)
267 snmp_mib_free((void **)idev->stats.ipv6);
272 static int snmp6_free_dev(struct inet6_dev *idev)
274 snmp_mib_free((void **)idev->stats.icmpv6);
275 snmp_mib_free((void **)idev->stats.ipv6);
279 /* Nobody refers to this device, we may destroy it. */
281 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
283 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
287 void in6_dev_finish_destroy(struct inet6_dev *idev)
289 struct net_device *dev = idev->dev;
290 BUG_TRAP(idev->addr_list==NULL);
291 BUG_TRAP(idev->mc_list==NULL);
292 #ifdef NET_REFCNT_DEBUG
293 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
297 printk("Freeing alive inet6 device %p\n", idev);
300 snmp6_free_dev(idev);
301 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
304 EXPORT_SYMBOL(in6_dev_finish_destroy);
306 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
308 struct inet6_dev *ndev;
309 struct in6_addr maddr;
313 if (dev->mtu < IPV6_MIN_MTU)
316 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
321 rwlock_init(&ndev->lock);
323 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
324 ndev->cnf.mtu6 = dev->mtu;
325 ndev->cnf.sysctl = NULL;
326 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
327 if (ndev->nd_parms == NULL) {
331 /* We refer to the device */
334 if (snmp6_alloc_dev(ndev) < 0) {
336 "%s(): cannot allocate memory for statistics; dev=%s.\n",
337 __FUNCTION__, dev->name));
338 neigh_parms_release(&nd_tbl, ndev->nd_parms);
340 in6_dev_finish_destroy(ndev);
344 if (snmp6_register_dev(ndev) < 0) {
346 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
347 __FUNCTION__, dev->name));
348 neigh_parms_release(&nd_tbl, ndev->nd_parms);
350 in6_dev_finish_destroy(ndev);
354 /* One reference from device. We must do this before
355 * we invoke __ipv6_regen_rndid().
359 #ifdef CONFIG_IPV6_PRIVACY
360 init_timer(&ndev->regen_timer);
361 ndev->regen_timer.function = ipv6_regen_rndid;
362 ndev->regen_timer.data = (unsigned long) ndev;
363 if ((dev->flags&IFF_LOOPBACK) ||
364 dev->type == ARPHRD_TUNNEL ||
365 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
366 dev->type == ARPHRD_SIT ||
368 dev->type == ARPHRD_NONE) {
370 "%s: Disabled Privacy Extensions\n",
372 ndev->cnf.use_tempaddr = -1;
375 ipv6_regen_rndid((unsigned long) ndev);
379 if (netif_running(dev) && netif_carrier_ok(dev))
380 ndev->if_flags |= IF_READY;
382 ipv6_mc_init_dev(ndev);
383 ndev->tstamp = jiffies;
385 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
386 NET_IPV6_NEIGH, "ipv6",
387 &ndisc_ifinfo_sysctl_change,
389 addrconf_sysctl_register(ndev, &ndev->cnf);
391 /* protected by rtnl_lock */
392 rcu_assign_pointer(dev->ip6_ptr, ndev);
394 /* Join all-node multicast group */
395 ipv6_addr_all_nodes(&maddr);
396 ipv6_dev_mc_inc(dev, &maddr);
401 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
403 struct inet6_dev *idev;
407 if ((idev = __in6_dev_get(dev)) == NULL) {
408 if ((idev = ipv6_add_dev(dev)) == NULL)
412 if (dev->flags&IFF_UP)
418 static void dev_forward_change(struct inet6_dev *idev)
420 struct net_device *dev;
421 struct inet6_ifaddr *ifa;
422 struct in6_addr addr;
427 if (dev && (dev->flags & IFF_MULTICAST)) {
428 ipv6_addr_all_routers(&addr);
430 if (idev->cnf.forwarding)
431 ipv6_dev_mc_inc(dev, &addr);
433 ipv6_dev_mc_dec(dev, &addr);
435 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
436 if (ifa->flags&IFA_F_TENTATIVE)
438 if (idev->cnf.forwarding)
439 addrconf_join_anycast(ifa);
441 addrconf_leave_anycast(ifa);
446 static void addrconf_forward_change(void)
448 struct net_device *dev;
449 struct inet6_dev *idev;
451 read_lock(&dev_base_lock);
452 for (dev=dev_base; dev; dev=dev->next) {
454 idev = __in6_dev_get(dev);
456 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
457 idev->cnf.forwarding = ipv6_devconf.forwarding;
459 dev_forward_change(idev);
463 read_unlock(&dev_base_lock);
467 /* Nobody refers to this ifaddr, destroy it */
469 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
471 BUG_TRAP(ifp->if_next==NULL);
472 BUG_TRAP(ifp->lst_next==NULL);
473 #ifdef NET_REFCNT_DEBUG
474 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
477 in6_dev_put(ifp->idev);
479 if (del_timer(&ifp->timer))
480 printk("Timer is still running, when freeing ifa=%p\n", ifp);
483 printk("Freeing alive inet6 address %p\n", ifp);
486 dst_release(&ifp->rt->u.dst);
492 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
494 struct inet6_ifaddr *ifa, **ifap;
495 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
498 * Each device address list is sorted in order of scope -
499 * global before linklocal.
501 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
502 ifap = &ifa->if_next) {
503 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
507 ifp->if_next = *ifap;
511 /* On success it returns ifp with increased reference count */
513 static struct inet6_ifaddr *
514 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
515 int scope, u32 flags)
517 struct inet6_ifaddr *ifa = NULL;
524 err = -ENODEV; /*XXX*/
528 write_lock(&addrconf_hash_lock);
530 /* Ignore adding duplicate addresses on an interface */
531 if (ipv6_chk_same_addr(addr, idev->dev)) {
532 ADBG(("ipv6_add_addr: already assigned\n"));
537 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
540 ADBG(("ipv6_add_addr: malloc failed\n"));
545 rt = addrconf_dst_alloc(idev, addr, 0);
551 ipv6_addr_copy(&ifa->addr, addr);
553 spin_lock_init(&ifa->lock);
554 init_timer(&ifa->timer);
555 ifa->timer.data = (unsigned long) ifa;
557 ifa->prefix_len = pfxlen;
558 ifa->flags = flags | IFA_F_TENTATIVE;
559 ifa->cstamp = ifa->tstamp = jiffies;
564 * part one of RFC 4429, section 3.3
565 * We should not configure an address as
566 * optimistic if we do not yet know the link
567 * layer address of our nexhop router
570 if (rt->rt6i_nexthop == NULL)
571 ifa->flags &= ~IFA_F_OPTIMISTIC;
578 /* Add to big hash table */
579 hash = ipv6_addr_hash(addr);
581 ifa->lst_next = inet6_addr_lst[hash];
582 inet6_addr_lst[hash] = ifa;
584 write_unlock(&addrconf_hash_lock);
586 write_lock(&idev->lock);
587 /* Add to inet6_dev unicast addr list. */
588 ipv6_link_dev_addr(idev, ifa);
590 #ifdef CONFIG_IPV6_PRIVACY
591 if (ifa->flags&IFA_F_TEMPORARY) {
592 ifa->tmp_next = idev->tempaddr_list;
593 idev->tempaddr_list = ifa;
599 write_unlock(&idev->lock);
601 rcu_read_unlock_bh();
603 if (likely(err == 0))
604 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
612 write_unlock(&addrconf_hash_lock);
616 /* This function wants to get referenced ifp and releases it before return */
618 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
620 struct inet6_ifaddr *ifa, **ifap;
621 struct inet6_dev *idev = ifp->idev;
623 int deleted = 0, onlink = 0;
624 unsigned long expires = jiffies;
626 hash = ipv6_addr_hash(&ifp->addr);
630 write_lock_bh(&addrconf_hash_lock);
631 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
632 ifap = &ifa->lst_next) {
634 *ifap = ifa->lst_next;
636 ifa->lst_next = NULL;
640 write_unlock_bh(&addrconf_hash_lock);
642 write_lock_bh(&idev->lock);
643 #ifdef CONFIG_IPV6_PRIVACY
644 if (ifp->flags&IFA_F_TEMPORARY) {
645 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
646 ifap = &ifa->tmp_next) {
648 *ifap = ifa->tmp_next;
650 in6_ifa_put(ifp->ifpub);
654 ifa->tmp_next = NULL;
661 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
663 *ifap = ifa->if_next;
666 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
670 } else if (ifp->flags & IFA_F_PERMANENT) {
671 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
673 if (ifa->flags & IFA_F_PERMANENT) {
678 unsigned long lifetime;
683 spin_lock(&ifa->lock);
684 lifetime = min_t(unsigned long,
685 ifa->valid_lft, 0x7fffffffUL/HZ);
686 if (time_before(expires,
687 ifa->tstamp + lifetime * HZ))
688 expires = ifa->tstamp + lifetime * HZ;
689 spin_unlock(&ifa->lock);
693 ifap = &ifa->if_next;
695 write_unlock_bh(&idev->lock);
697 ipv6_ifa_notify(RTM_DELADDR, ifp);
699 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
701 addrconf_del_timer(ifp);
704 * Purge or update corresponding prefix
706 * 1) we don't purge prefix here if address was not permanent.
707 * prefix is managed by its own lifetime.
708 * 2) if there're no addresses, delete prefix.
709 * 3) if there're still other permanent address(es),
710 * corresponding prefix is still permanent.
711 * 4) otherwise, update prefix lifetime to the
712 * longest valid lifetime among the corresponding
713 * addresses on the device.
714 * Note: subsequent RA will update lifetime.
718 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
719 struct in6_addr prefix;
722 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
723 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
725 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
729 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
730 rt->rt6i_expires = expires;
731 rt->rt6i_flags |= RTF_EXPIRES;
734 dst_release(&rt->u.dst);
740 #ifdef CONFIG_IPV6_PRIVACY
741 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
743 struct inet6_dev *idev = ifp->idev;
744 struct in6_addr addr, *tmpaddr;
745 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
751 write_lock(&idev->lock);
753 spin_lock_bh(&ift->lock);
754 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
755 spin_unlock_bh(&ift->lock);
762 if (idev->cnf.use_tempaddr <= 0) {
763 write_unlock(&idev->lock);
765 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
770 spin_lock_bh(&ifp->lock);
771 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
772 idev->cnf.use_tempaddr = -1; /*XXX*/
773 spin_unlock_bh(&ifp->lock);
774 write_unlock(&idev->lock);
776 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
782 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
783 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
784 spin_unlock_bh(&ifp->lock);
785 write_unlock(&idev->lock);
787 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
793 memcpy(&addr.s6_addr[8], idev->rndid, 8);
794 tmp_valid_lft = min_t(__u32,
796 idev->cnf.temp_valid_lft);
797 tmp_prefered_lft = min_t(__u32,
799 idev->cnf.temp_prefered_lft - desync_factor / HZ);
800 tmp_plen = ifp->prefix_len;
801 max_addresses = idev->cnf.max_addresses;
802 tmp_cstamp = ifp->cstamp;
803 tmp_tstamp = ifp->tstamp;
804 spin_unlock_bh(&ifp->lock);
806 write_unlock(&idev->lock);
808 addr_flags = IFA_F_TEMPORARY;
809 /* set in addrconf_prefix_rcv() */
810 if (ifp->flags & IFA_F_OPTIMISTIC)
811 addr_flags |= IFA_F_OPTIMISTIC;
813 ift = !max_addresses ||
814 ipv6_count_addresses(idev) < max_addresses ?
815 ipv6_add_addr(idev, &addr, tmp_plen,
816 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
818 if (!ift || IS_ERR(ift)) {
822 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
824 write_lock(&idev->lock);
828 spin_lock_bh(&ift->lock);
830 ift->valid_lft = tmp_valid_lft;
831 ift->prefered_lft = tmp_prefered_lft;
832 ift->cstamp = tmp_cstamp;
833 ift->tstamp = tmp_tstamp;
834 spin_unlock_bh(&ift->lock);
836 addrconf_dad_start(ift, 0);
845 * Choose an appropriate source address (RFC3484)
847 struct ipv6_saddr_score {
855 #define IPV6_SADDR_SCORE_LOCAL 0x0001
856 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
857 #define IPV6_SADDR_SCORE_HOA 0x0008
858 #define IPV6_SADDR_SCORE_OIF 0x0010
859 #define IPV6_SADDR_SCORE_LABEL 0x0020
860 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
862 static inline int ipv6_saddr_preferred(int type)
864 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
865 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
870 /* static matching label */
871 static inline int ipv6_saddr_label(const struct in6_addr *addr, int type)
874 * prefix (longest match) label
875 * -----------------------------
884 if (type & IPV6_ADDR_LOOPBACK)
886 else if (type & IPV6_ADDR_COMPATv4)
888 else if (type & IPV6_ADDR_MAPPED)
890 else if (addr->s6_addr32[0] == htonl(0x20010000))
892 else if (addr->s6_addr16[0] == htons(0x2002))
894 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
899 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
900 struct in6_addr *daddr, struct in6_addr *saddr)
902 struct ipv6_saddr_score hiscore;
903 struct inet6_ifaddr *ifa_result = NULL;
904 int daddr_type = __ipv6_addr_type(daddr);
905 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
906 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
907 struct net_device *dev;
909 memset(&hiscore, 0, sizeof(hiscore));
911 read_lock(&dev_base_lock);
914 for (dev = dev_base; dev; dev=dev->next) {
915 struct inet6_dev *idev;
916 struct inet6_ifaddr *ifa;
918 /* Rule 0: Candidate Source Address (section 4)
919 * - multicast and link-local destination address,
920 * the set of candidate source address MUST only
921 * include addresses assigned to interfaces
922 * belonging to the same link as the outgoing
924 * (- For site-local destination addresses, the
925 * set of candidate source addresses MUST only
926 * include addresses assigned to interfaces
927 * belonging to the same site as the outgoing
930 if ((daddr_type & IPV6_ADDR_MULTICAST ||
931 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
932 daddr_dev && dev != daddr_dev)
935 idev = __in6_dev_get(dev);
939 read_lock_bh(&idev->lock);
940 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
941 struct ipv6_saddr_score score;
943 score.addr_type = __ipv6_addr_type(&ifa->addr);
946 * - Tentative Address (RFC2462 section 5.4)
947 * - A tentative address is not considered
948 * "assigned to an interface" in the traditional
949 * sense, unless it is also flagged as optimistic.
950 * - Candidate Source Address (section 4)
951 * - In any case, anycast addresses, multicast
952 * addresses, and the unspecified address MUST
953 * NOT be included in a candidate set.
955 if ((ifa->flags & IFA_F_TENTATIVE) &&
956 (!(ifa->flags & IFA_F_OPTIMISTIC)))
958 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
959 score.addr_type & IPV6_ADDR_MULTICAST)) {
960 LIMIT_NETDEBUG(KERN_DEBUG
961 "ADDRCONF: unspecified / multicast address"
962 "assigned as unicast address on %s",
972 if (ifa_result == NULL) {
973 /* record it if the first available entry */
977 /* Rule 1: Prefer same address */
978 if (hiscore.rule < 1) {
979 if (ipv6_addr_equal(&ifa_result->addr, daddr))
980 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
983 if (ipv6_addr_equal(&ifa->addr, daddr)) {
984 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
985 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
990 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
994 /* Rule 2: Prefer appropriate scope */
995 if (hiscore.rule < 2) {
996 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
999 score.scope = __ipv6_addr_src_scope(score.addr_type);
1000 if (hiscore.scope < score.scope) {
1001 if (hiscore.scope < daddr_scope) {
1006 } else if (score.scope < hiscore.scope) {
1007 if (score.scope < daddr_scope)
1008 break; /* addresses sorted by scope */
1015 /* Rule 3: Avoid deprecated and optimistic addresses */
1016 if (hiscore.rule < 3) {
1017 if (ipv6_saddr_preferred(hiscore.addr_type) ||
1018 (((ifa_result->flags &
1019 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
1020 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1023 if (ipv6_saddr_preferred(score.addr_type) ||
1024 (((ifa_result->flags &
1025 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
1026 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1027 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1032 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1036 /* Rule 4: Prefer home address */
1037 #ifdef CONFIG_IPV6_MIP6
1038 if (hiscore.rule < 4) {
1039 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1040 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1043 if (ifa->flags & IFA_F_HOMEADDRESS) {
1044 score.attrs |= IPV6_SADDR_SCORE_HOA;
1045 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1050 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1054 if (hiscore.rule < 4)
1058 /* Rule 5: Prefer outgoing interface */
1059 if (hiscore.rule < 5) {
1060 if (daddr_dev == NULL ||
1061 daddr_dev == ifa_result->idev->dev)
1062 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1065 if (daddr_dev == NULL ||
1066 daddr_dev == ifa->idev->dev) {
1067 score.attrs |= IPV6_SADDR_SCORE_OIF;
1068 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1073 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1077 /* Rule 6: Prefer matching label */
1078 if (hiscore.rule < 6) {
1079 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1080 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1083 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1084 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1085 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1090 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1094 #ifdef CONFIG_IPV6_PRIVACY
1095 /* Rule 7: Prefer public address
1096 * Note: prefer temprary address if use_tempaddr >= 2
1098 if (hiscore.rule < 7) {
1099 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1100 (ifa_result->idev->cnf.use_tempaddr >= 2))
1101 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1104 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1105 (ifa->idev->cnf.use_tempaddr >= 2)) {
1106 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1107 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1112 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1116 if (hiscore.rule < 7)
1119 /* Rule 8: Use longest matching prefix */
1120 if (hiscore.rule < 8) {
1121 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1124 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1125 if (score.matchlen > hiscore.matchlen) {
1130 else if (score.matchlen < hiscore.matchlen)
1134 /* Final Rule: choose first available one */
1138 in6_ifa_put(ifa_result);
1143 read_unlock_bh(&idev->lock);
1146 read_unlock(&dev_base_lock);
1149 return -EADDRNOTAVAIL;
1151 ipv6_addr_copy(saddr, &ifa_result->addr);
1152 in6_ifa_put(ifa_result);
1157 int ipv6_get_saddr(struct dst_entry *dst,
1158 struct in6_addr *daddr, struct in6_addr *saddr)
1160 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1163 EXPORT_SYMBOL(ipv6_get_saddr);
1165 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1166 unsigned char banned_flags)
1168 struct inet6_dev *idev;
1169 int err = -EADDRNOTAVAIL;
1172 if ((idev = __in6_dev_get(dev)) != NULL) {
1173 struct inet6_ifaddr *ifp;
1175 read_lock_bh(&idev->lock);
1176 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1177 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1178 ipv6_addr_copy(addr, &ifp->addr);
1183 read_unlock_bh(&idev->lock);
1189 static int ipv6_count_addresses(struct inet6_dev *idev)
1192 struct inet6_ifaddr *ifp;
1194 read_lock_bh(&idev->lock);
1195 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1197 read_unlock_bh(&idev->lock);
1201 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1203 struct inet6_ifaddr * ifp;
1204 u8 hash = ipv6_addr_hash(addr);
1206 read_lock_bh(&addrconf_hash_lock);
1207 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1208 if (ipv6_addr_equal(&ifp->addr, addr) &&
1209 !(ifp->flags&IFA_F_TENTATIVE)) {
1210 if (dev == NULL || ifp->idev->dev == dev ||
1211 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1215 read_unlock_bh(&addrconf_hash_lock);
1219 EXPORT_SYMBOL(ipv6_chk_addr);
1222 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1224 struct inet6_ifaddr * ifp;
1225 u8 hash = ipv6_addr_hash(addr);
1227 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1228 if (ipv6_addr_equal(&ifp->addr, addr)) {
1229 if (dev == NULL || ifp->idev->dev == dev)
1236 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1238 struct inet6_ifaddr * ifp;
1239 u8 hash = ipv6_addr_hash(addr);
1241 read_lock_bh(&addrconf_hash_lock);
1242 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1243 if (ipv6_addr_equal(&ifp->addr, addr)) {
1244 if (dev == NULL || ifp->idev->dev == dev ||
1245 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1251 read_unlock_bh(&addrconf_hash_lock);
1256 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1258 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1259 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1260 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1261 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1262 int sk_ipv6only = ipv6_only_sock(sk);
1263 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1264 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1265 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1267 if (!sk2_rcv_saddr && !sk_ipv6only)
1270 if (addr_type2 == IPV6_ADDR_ANY &&
1271 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1274 if (addr_type == IPV6_ADDR_ANY &&
1275 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1278 if (sk2_rcv_saddr6 &&
1279 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1282 if (addr_type == IPV6_ADDR_MAPPED &&
1284 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1290 /* Gets referenced address, destroys ifaddr */
1292 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1294 if (ifp->flags&IFA_F_PERMANENT) {
1295 spin_lock_bh(&ifp->lock);
1296 addrconf_del_timer(ifp);
1297 ifp->flags |= IFA_F_TENTATIVE;
1298 spin_unlock_bh(&ifp->lock);
1300 #ifdef CONFIG_IPV6_PRIVACY
1301 } else if (ifp->flags&IFA_F_TEMPORARY) {
1302 struct inet6_ifaddr *ifpub;
1303 spin_lock_bh(&ifp->lock);
1306 in6_ifa_hold(ifpub);
1307 spin_unlock_bh(&ifp->lock);
1308 ipv6_create_tempaddr(ifpub, ifp);
1311 spin_unlock_bh(&ifp->lock);
1319 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1321 if (net_ratelimit())
1322 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1323 addrconf_dad_stop(ifp);
1326 /* Join to solicited addr multicast group. */
1328 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1330 struct in6_addr maddr;
1332 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1335 addrconf_addr_solict_mult(addr, &maddr);
1336 ipv6_dev_mc_inc(dev, &maddr);
1339 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1341 struct in6_addr maddr;
1343 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1346 addrconf_addr_solict_mult(addr, &maddr);
1347 __ipv6_dev_mc_dec(idev, &maddr);
1350 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1352 struct in6_addr addr;
1353 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1354 if (ipv6_addr_any(&addr))
1356 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1359 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1361 struct in6_addr addr;
1362 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1363 if (ipv6_addr_any(&addr))
1365 __ipv6_dev_ac_dec(ifp->idev, &addr);
1368 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1370 if (dev->addr_len != ETH_ALEN)
1372 memcpy(eui, dev->dev_addr, 3);
1373 memcpy(eui + 5, dev->dev_addr + 3, 3);
1376 * The zSeries OSA network cards can be shared among various
1377 * OS instances, but the OSA cards have only one MAC address.
1378 * This leads to duplicate address conflicts in conjunction
1379 * with IPv6 if more than one instance uses the same card.
1381 * The driver for these cards can deliver a unique 16-bit
1382 * identifier for each instance sharing the same card. It is
1383 * placed instead of 0xFFFE in the interface identifier. The
1384 * "u" bit of the interface identifier is not inverted in this
1385 * case. Hence the resulting interface identifier has local
1386 * scope according to RFC2373.
1389 eui[3] = (dev->dev_id >> 8) & 0xFF;
1390 eui[4] = dev->dev_id & 0xFF;
1399 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1401 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1402 if (dev->addr_len != ARCNET_ALEN)
1405 eui[7] = *(u8*)dev->dev_addr;
1409 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1411 if (dev->addr_len != INFINIBAND_ALEN)
1413 memcpy(eui, dev->dev_addr + 12, 8);
1418 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1420 switch (dev->type) {
1423 case ARPHRD_IEEE802_TR:
1424 return addrconf_ifid_eui48(eui, dev);
1426 return addrconf_ifid_arcnet(eui, dev);
1427 case ARPHRD_INFINIBAND:
1428 return addrconf_ifid_infiniband(eui, dev);
1433 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1436 struct inet6_ifaddr *ifp;
1438 read_lock_bh(&idev->lock);
1439 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1440 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1441 memcpy(eui, ifp->addr.s6_addr+8, 8);
1446 read_unlock_bh(&idev->lock);
1450 #ifdef CONFIG_IPV6_PRIVACY
1451 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1452 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1455 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1456 idev->rndid[0] &= ~0x02;
1459 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1460 * check if generated address is not inappropriate
1462 * - Reserved subnet anycast (RFC 2526)
1463 * 11111101 11....11 1xxxxxxx
1464 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1465 * 00-00-5E-FE-xx-xx-xx-xx
1467 * - XXX: already assigned to an address on the device
1469 if (idev->rndid[0] == 0xfd &&
1470 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1471 (idev->rndid[7]&0x80))
1473 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1474 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1476 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1483 static void ipv6_regen_rndid(unsigned long data)
1485 struct inet6_dev *idev = (struct inet6_dev *) data;
1486 unsigned long expires;
1489 write_lock_bh(&idev->lock);
1494 if (__ipv6_regen_rndid(idev) < 0)
1498 idev->cnf.temp_prefered_lft * HZ -
1499 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1500 if (time_before(expires, jiffies)) {
1502 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1507 if (!mod_timer(&idev->regen_timer, expires))
1511 write_unlock_bh(&idev->lock);
1512 rcu_read_unlock_bh();
1516 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1519 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1520 ret = __ipv6_regen_rndid(idev);
1530 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1531 unsigned long expires, u32 flags)
1533 struct fib6_config cfg = {
1534 .fc_table = RT6_TABLE_PREFIX,
1535 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1536 .fc_ifindex = dev->ifindex,
1537 .fc_expires = expires,
1539 .fc_flags = RTF_UP | flags,
1542 ipv6_addr_copy(&cfg.fc_dst, pfx);
1544 /* Prevent useless cloning on PtP SIT.
1545 This thing is done here expecting that the whole
1546 class of non-broadcast devices need not cloning.
1548 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1549 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1550 cfg.fc_flags |= RTF_NONEXTHOP;
1553 ip6_route_add(&cfg);
1556 /* Create "default" multicast route to the interface */
1558 static void addrconf_add_mroute(struct net_device *dev)
1560 struct fib6_config cfg = {
1561 .fc_table = RT6_TABLE_LOCAL,
1562 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1563 .fc_ifindex = dev->ifindex,
1568 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1570 ip6_route_add(&cfg);
1573 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1574 static void sit_route_add(struct net_device *dev)
1576 struct fib6_config cfg = {
1577 .fc_table = RT6_TABLE_MAIN,
1578 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1579 .fc_ifindex = dev->ifindex,
1581 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1584 /* prefix length - 96 bits "::d.d.d.d" */
1585 ip6_route_add(&cfg);
1589 static void addrconf_add_lroute(struct net_device *dev)
1591 struct in6_addr addr;
1593 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1594 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1597 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1599 struct inet6_dev *idev;
1603 if ((idev = ipv6_find_idev(dev)) == NULL)
1606 /* Add default multicast route */
1607 addrconf_add_mroute(dev);
1609 /* Add link local route */
1610 addrconf_add_lroute(dev);
1614 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1616 struct prefix_info *pinfo;
1620 unsigned long rt_expires;
1621 struct inet6_dev *in6_dev;
1623 pinfo = (struct prefix_info *) opt;
1625 if (len < sizeof(struct prefix_info)) {
1626 ADBG(("addrconf: prefix option too short\n"));
1631 * Validation checks ([ADDRCONF], page 19)
1634 addr_type = ipv6_addr_type(&pinfo->prefix);
1636 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1639 valid_lft = ntohl(pinfo->valid);
1640 prefered_lft = ntohl(pinfo->prefered);
1642 if (prefered_lft > valid_lft) {
1643 if (net_ratelimit())
1644 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1648 in6_dev = in6_dev_get(dev);
1650 if (in6_dev == NULL) {
1651 if (net_ratelimit())
1652 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1657 * Two things going on here:
1658 * 1) Add routes for on-link prefixes
1659 * 2) Configure prefixes with the auto flag set
1662 /* Avoid arithmetic overflow. Really, we could
1663 save rt_expires in seconds, likely valid_lft,
1664 but it would require division in fib gc, that it
1667 if (valid_lft >= 0x7FFFFFFF/HZ)
1668 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1670 rt_expires = valid_lft * HZ;
1673 * We convert this (in jiffies) to clock_t later.
1674 * Avoid arithmetic overflow there as well.
1675 * Overflow can happen only if HZ < USER_HZ.
1677 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1678 rt_expires = 0x7FFFFFFF / USER_HZ;
1680 if (pinfo->onlink) {
1681 struct rt6_info *rt;
1682 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1684 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1685 if (rt->rt6i_flags&RTF_EXPIRES) {
1686 if (valid_lft == 0) {
1690 rt->rt6i_expires = jiffies + rt_expires;
1693 } else if (valid_lft) {
1694 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1695 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1698 dst_release(&rt->u.dst);
1701 /* Try to figure out our local address for this prefix */
1703 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1704 struct inet6_ifaddr * ifp;
1705 struct in6_addr addr;
1706 int create = 0, update_lft = 0;
1708 if (pinfo->prefix_len == 64) {
1709 memcpy(&addr, &pinfo->prefix, 8);
1710 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1711 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1712 in6_dev_put(in6_dev);
1717 if (net_ratelimit())
1718 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1720 in6_dev_put(in6_dev);
1725 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1727 if (ifp == NULL && valid_lft) {
1728 int max_addresses = in6_dev->cnf.max_addresses;
1731 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1732 if (in6_dev->cnf.optimistic_dad &&
1733 !ipv6_devconf.forwarding)
1734 addr_flags = IFA_F_OPTIMISTIC;
1737 /* Do not allow to create too much of autoconfigured
1738 * addresses; this would be too easy way to crash kernel.
1740 if (!max_addresses ||
1741 ipv6_count_addresses(in6_dev) < max_addresses)
1742 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1743 addr_type&IPV6_ADDR_SCOPE_MASK,
1746 if (!ifp || IS_ERR(ifp)) {
1747 in6_dev_put(in6_dev);
1751 update_lft = create = 1;
1752 ifp->cstamp = jiffies;
1753 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1759 #ifdef CONFIG_IPV6_PRIVACY
1760 struct inet6_ifaddr *ift;
1764 /* update lifetime (RFC2462 5.5.3 e) */
1765 spin_lock(&ifp->lock);
1767 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1768 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1771 if (!update_lft && stored_lft) {
1772 if (valid_lft > MIN_VALID_LIFETIME ||
1773 valid_lft > stored_lft)
1775 else if (stored_lft <= MIN_VALID_LIFETIME) {
1776 /* valid_lft <= stored_lft is always true */
1780 valid_lft = MIN_VALID_LIFETIME;
1781 if (valid_lft < prefered_lft)
1782 prefered_lft = valid_lft;
1788 ifp->valid_lft = valid_lft;
1789 ifp->prefered_lft = prefered_lft;
1792 ifp->flags &= ~IFA_F_DEPRECATED;
1793 spin_unlock(&ifp->lock);
1795 if (!(flags&IFA_F_TENTATIVE))
1796 ipv6_ifa_notify(0, ifp);
1798 spin_unlock(&ifp->lock);
1800 #ifdef CONFIG_IPV6_PRIVACY
1801 read_lock_bh(&in6_dev->lock);
1802 /* update all temporary addresses in the list */
1803 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1805 * When adjusting the lifetimes of an existing
1806 * temporary address, only lower the lifetimes.
1807 * Implementations must not increase the
1808 * lifetimes of an existing temporary address
1809 * when processing a Prefix Information Option.
1811 spin_lock(&ift->lock);
1813 if (ift->valid_lft > valid_lft &&
1814 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1815 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1816 if (ift->prefered_lft > prefered_lft &&
1817 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1818 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1819 spin_unlock(&ift->lock);
1820 if (!(flags&IFA_F_TENTATIVE))
1821 ipv6_ifa_notify(0, ift);
1824 if (create && in6_dev->cnf.use_tempaddr > 0) {
1826 * When a new public address is created as described in [ADDRCONF],
1827 * also create a new temporary address.
1829 read_unlock_bh(&in6_dev->lock);
1830 ipv6_create_tempaddr(ifp, NULL);
1832 read_unlock_bh(&in6_dev->lock);
1839 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1840 in6_dev_put(in6_dev);
1844 * Set destination address.
1845 * Special case for SIT interfaces where we create a new "virtual"
1848 int addrconf_set_dstaddr(void __user *arg)
1850 struct in6_ifreq ireq;
1851 struct net_device *dev;
1857 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1860 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1866 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1867 if (dev->type == ARPHRD_SIT) {
1870 struct ip_tunnel_parm p;
1872 err = -EADDRNOTAVAIL;
1873 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1876 memset(&p, 0, sizeof(p));
1877 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1881 p.iph.protocol = IPPROTO_IPV6;
1883 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1885 oldfs = get_fs(); set_fs(KERNEL_DS);
1886 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1891 if ((dev = __dev_get_by_name(p.name)) == NULL)
1893 err = dev_open(dev);
1904 * Manual configuration of address on an interface
1906 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1907 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1909 struct inet6_ifaddr *ifp;
1910 struct inet6_dev *idev;
1911 struct net_device *dev;
1913 u32 flags = RTF_EXPIRES;
1917 /* check the lifetime */
1918 if (!valid_lft || prefered_lft > valid_lft)
1921 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1924 if ((idev = addrconf_add_dev(dev)) == NULL)
1927 scope = ipv6_addr_scope(pfx);
1929 if (valid_lft == INFINITY_LIFE_TIME) {
1930 ifa_flags |= IFA_F_PERMANENT;
1932 } else if (valid_lft >= 0x7FFFFFFF/HZ)
1933 valid_lft = 0x7FFFFFFF/HZ;
1935 if (prefered_lft == 0)
1936 ifa_flags |= IFA_F_DEPRECATED;
1937 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1938 (prefered_lft != INFINITY_LIFE_TIME))
1939 prefered_lft = 0x7FFFFFFF/HZ;
1941 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1944 spin_lock_bh(&ifp->lock);
1945 ifp->valid_lft = valid_lft;
1946 ifp->prefered_lft = prefered_lft;
1947 ifp->tstamp = jiffies;
1948 spin_unlock_bh(&ifp->lock);
1950 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1951 jiffies_to_clock_t(valid_lft * HZ), flags);
1953 * Note that section 3.1 of RFC 4429 indicates
1954 * that the Optimistic flag should not be set for
1955 * manually configured addresses
1957 addrconf_dad_start(ifp, 0);
1963 return PTR_ERR(ifp);
1966 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1968 struct inet6_ifaddr *ifp;
1969 struct inet6_dev *idev;
1970 struct net_device *dev;
1972 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1975 if ((idev = __in6_dev_get(dev)) == NULL)
1978 read_lock_bh(&idev->lock);
1979 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1980 if (ifp->prefix_len == plen &&
1981 ipv6_addr_equal(pfx, &ifp->addr)) {
1983 read_unlock_bh(&idev->lock);
1987 /* If the last address is deleted administratively,
1988 disable IPv6 on this interface.
1990 if (idev->addr_list == NULL)
1991 addrconf_ifdown(idev->dev, 1);
1995 read_unlock_bh(&idev->lock);
1996 return -EADDRNOTAVAIL;
2000 int addrconf_add_ifaddr(void __user *arg)
2002 struct in6_ifreq ireq;
2005 if (!capable(CAP_NET_ADMIN))
2008 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2012 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
2013 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2018 int addrconf_del_ifaddr(void __user *arg)
2020 struct in6_ifreq ireq;
2023 if (!capable(CAP_NET_ADMIN))
2026 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2030 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2035 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2036 static void sit_add_v4_addrs(struct inet6_dev *idev)
2038 struct inet6_ifaddr * ifp;
2039 struct in6_addr addr;
2040 struct net_device *dev;
2045 memset(&addr, 0, sizeof(struct in6_addr));
2046 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2048 if (idev->dev->flags&IFF_POINTOPOINT) {
2049 addr.s6_addr32[0] = htonl(0xfe800000);
2052 scope = IPV6_ADDR_COMPATv4;
2055 if (addr.s6_addr32[3]) {
2056 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2058 spin_lock_bh(&ifp->lock);
2059 ifp->flags &= ~IFA_F_TENTATIVE;
2060 spin_unlock_bh(&ifp->lock);
2061 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2067 for (dev = dev_base; dev != NULL; dev = dev->next) {
2068 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2069 if (in_dev && (dev->flags & IFF_UP)) {
2070 struct in_ifaddr * ifa;
2074 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2077 addr.s6_addr32[3] = ifa->ifa_local;
2079 if (ifa->ifa_scope == RT_SCOPE_LINK)
2081 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2082 if (idev->dev->flags&IFF_POINTOPOINT)
2086 if (idev->dev->flags&IFF_POINTOPOINT)
2091 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2094 spin_lock_bh(&ifp->lock);
2095 ifp->flags &= ~IFA_F_TENTATIVE;
2096 spin_unlock_bh(&ifp->lock);
2097 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2106 static void init_loopback(struct net_device *dev)
2108 struct inet6_dev *idev;
2109 struct inet6_ifaddr * ifp;
2115 if ((idev = ipv6_find_idev(dev)) == NULL) {
2116 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2120 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2122 spin_lock_bh(&ifp->lock);
2123 ifp->flags &= ~IFA_F_TENTATIVE;
2124 spin_unlock_bh(&ifp->lock);
2125 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2130 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2132 struct inet6_ifaddr * ifp;
2133 u32 addr_flags = IFA_F_PERMANENT;
2135 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2136 if (idev->cnf.optimistic_dad &&
2137 !ipv6_devconf.forwarding)
2138 addr_flags |= IFA_F_OPTIMISTIC;
2142 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
2144 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2145 addrconf_dad_start(ifp, 0);
2150 static void addrconf_dev_config(struct net_device *dev)
2152 struct in6_addr addr;
2153 struct inet6_dev * idev;
2157 if ((dev->type != ARPHRD_ETHER) &&
2158 (dev->type != ARPHRD_FDDI) &&
2159 (dev->type != ARPHRD_IEEE802_TR) &&
2160 (dev->type != ARPHRD_ARCNET) &&
2161 (dev->type != ARPHRD_INFINIBAND)) {
2162 /* Alas, we support only Ethernet autoconfiguration. */
2166 idev = addrconf_add_dev(dev);
2170 memset(&addr, 0, sizeof(struct in6_addr));
2171 addr.s6_addr32[0] = htonl(0xFE800000);
2173 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2174 addrconf_add_linklocal(idev, &addr);
2177 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2178 static void addrconf_sit_config(struct net_device *dev)
2180 struct inet6_dev *idev;
2185 * Configure the tunnel with one of our IPv4
2186 * addresses... we should configure all of
2187 * our v4 addrs in the tunnel
2190 if ((idev = ipv6_find_idev(dev)) == NULL) {
2191 printk(KERN_DEBUG "init sit: add_dev failed\n");
2195 sit_add_v4_addrs(idev);
2197 if (dev->flags&IFF_POINTOPOINT) {
2198 addrconf_add_mroute(dev);
2199 addrconf_add_lroute(dev);
2206 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2208 struct in6_addr lladdr;
2210 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2211 addrconf_add_linklocal(idev, &lladdr);
2217 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2219 struct net_device *link_dev;
2221 /* first try to inherit the link-local address from the link device */
2222 if (idev->dev->iflink &&
2223 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2224 if (!ipv6_inherit_linklocal(idev, link_dev))
2227 /* then try to inherit it from any device */
2228 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2229 if (!ipv6_inherit_linklocal(idev, link_dev))
2232 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2236 * Autoconfigure tunnel with a link-local address so routing protocols,
2237 * DHCPv6, MLD etc. can be run over the virtual link
2240 static void addrconf_ip6_tnl_config(struct net_device *dev)
2242 struct inet6_dev *idev;
2246 if ((idev = addrconf_add_dev(dev)) == NULL) {
2247 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2250 ip6_tnl_add_linklocal(idev);
2253 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2256 struct net_device *dev = (struct net_device *) data;
2257 struct inet6_dev *idev = __in6_dev_get(dev);
2258 int run_pending = 0;
2261 case NETDEV_REGISTER:
2263 idev = ipv6_add_dev(dev);
2265 printk(KERN_WARNING "IPv6: add_dev failed for %s\n",
2271 if (event == NETDEV_UP) {
2272 if (!netif_carrier_ok(dev)) {
2273 /* device is not ready yet. */
2275 "ADDRCONF(NETDEV_UP): %s: "
2276 "link is not ready\n",
2282 idev->if_flags |= IF_READY;
2284 if (!netif_carrier_ok(dev)) {
2285 /* device is still not ready. */
2290 if (idev->if_flags & IF_READY) {
2291 /* device is already configured. */
2294 idev->if_flags |= IF_READY;
2298 "ADDRCONF(NETDEV_CHANGE): %s: "
2299 "link becomes ready\n",
2306 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2308 addrconf_sit_config(dev);
2311 case ARPHRD_TUNNEL6:
2312 addrconf_ip6_tnl_config(dev);
2314 case ARPHRD_LOOPBACK:
2319 addrconf_dev_config(dev);
2324 addrconf_dad_run(idev);
2326 /* If the MTU changed during the interface down, when the
2327 interface up, the changed MTU must be reflected in the
2328 idev as well as routers.
2330 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2331 rt6_mtu_change(dev, dev->mtu);
2332 idev->cnf.mtu6 = dev->mtu;
2334 idev->tstamp = jiffies;
2335 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2336 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2337 stop IPv6 on this interface.
2339 if (dev->mtu < IPV6_MIN_MTU)
2340 addrconf_ifdown(dev, event != NETDEV_DOWN);
2344 case NETDEV_CHANGEMTU:
2345 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2346 rt6_mtu_change(dev, dev->mtu);
2347 idev->cnf.mtu6 = dev->mtu;
2351 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2354 case NETDEV_UNREGISTER:
2356 * Remove all addresses from this interface.
2358 addrconf_ifdown(dev, event != NETDEV_DOWN);
2361 case NETDEV_CHANGENAME:
2362 #ifdef CONFIG_SYSCTL
2364 addrconf_sysctl_unregister(&idev->cnf);
2365 neigh_sysctl_unregister(idev->nd_parms);
2366 neigh_sysctl_register(dev, idev->nd_parms,
2367 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2368 &ndisc_ifinfo_sysctl_change,
2370 addrconf_sysctl_register(idev, &idev->cnf);
2380 * addrconf module should be notified of a device going up
2382 static struct notifier_block ipv6_dev_notf = {
2383 .notifier_call = addrconf_notify,
2387 static int addrconf_ifdown(struct net_device *dev, int how)
2389 struct inet6_dev *idev;
2390 struct inet6_ifaddr *ifa, **bifa;
2395 if (dev == &loopback_dev && how == 1)
2399 neigh_ifdown(&nd_tbl, dev);
2401 idev = __in6_dev_get(dev);
2405 /* Step 1: remove reference to ipv6 device from parent device.
2411 /* protected by rtnl_lock */
2412 rcu_assign_pointer(dev->ip6_ptr, NULL);
2414 /* Step 1.5: remove snmp6 entry */
2415 snmp6_unregister_dev(idev);
2419 /* Step 2: clear hash table */
2420 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2421 bifa = &inet6_addr_lst[i];
2423 write_lock_bh(&addrconf_hash_lock);
2424 while ((ifa = *bifa) != NULL) {
2425 if (ifa->idev == idev) {
2426 *bifa = ifa->lst_next;
2427 ifa->lst_next = NULL;
2428 addrconf_del_timer(ifa);
2432 bifa = &ifa->lst_next;
2434 write_unlock_bh(&addrconf_hash_lock);
2437 write_lock_bh(&idev->lock);
2439 /* Step 3: clear flags for stateless addrconf */
2441 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2443 /* Step 4: clear address list */
2444 #ifdef CONFIG_IPV6_PRIVACY
2445 if (how == 1 && del_timer(&idev->regen_timer))
2448 /* clear tempaddr list */
2449 while ((ifa = idev->tempaddr_list) != NULL) {
2450 idev->tempaddr_list = ifa->tmp_next;
2451 ifa->tmp_next = NULL;
2453 write_unlock_bh(&idev->lock);
2454 spin_lock_bh(&ifa->lock);
2457 in6_ifa_put(ifa->ifpub);
2460 spin_unlock_bh(&ifa->lock);
2462 write_lock_bh(&idev->lock);
2465 while ((ifa = idev->addr_list) != NULL) {
2466 idev->addr_list = ifa->if_next;
2467 ifa->if_next = NULL;
2469 addrconf_del_timer(ifa);
2470 write_unlock_bh(&idev->lock);
2472 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2475 write_lock_bh(&idev->lock);
2477 write_unlock_bh(&idev->lock);
2479 /* Step 5: Discard multicast list */
2482 ipv6_mc_destroy_dev(idev);
2486 /* Step 5: netlink notification of this interface */
2487 idev->tstamp = jiffies;
2488 inet6_ifinfo_notify(RTM_DELLINK, idev);
2490 /* Shot the device (if unregistered) */
2493 #ifdef CONFIG_SYSCTL
2494 addrconf_sysctl_unregister(&idev->cnf);
2495 neigh_sysctl_unregister(idev->nd_parms);
2497 neigh_parms_release(&nd_tbl, idev->nd_parms);
2498 neigh_ifdown(&nd_tbl, dev);
2504 static void addrconf_rs_timer(unsigned long data)
2506 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2508 if (ifp->idev->cnf.forwarding)
2511 if (ifp->idev->if_flags & IF_RA_RCVD) {
2513 * Announcement received after solicitation
2519 spin_lock(&ifp->lock);
2520 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2521 struct in6_addr all_routers;
2523 /* The wait after the last probe can be shorter */
2524 addrconf_mod_timer(ifp, AC_RS,
2525 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2526 ifp->idev->cnf.rtr_solicit_delay :
2527 ifp->idev->cnf.rtr_solicit_interval);
2528 spin_unlock(&ifp->lock);
2530 ipv6_addr_all_routers(&all_routers);
2532 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2534 spin_unlock(&ifp->lock);
2536 * Note: we do not support deprecated "all on-link"
2537 * assumption any longer.
2539 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2540 ifp->idev->dev->name);
2548 * Duplicate Address Detection
2550 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2552 unsigned long rand_num;
2553 struct inet6_dev *idev = ifp->idev;
2555 if (ifp->flags & IFA_F_OPTIMISTIC)
2558 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2560 ifp->probes = idev->cnf.dad_transmits;
2561 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2564 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2566 struct inet6_dev *idev = ifp->idev;
2567 struct net_device *dev = idev->dev;
2569 addrconf_join_solict(dev, &ifp->addr);
2571 net_srandom(ifp->addr.s6_addr32[3]);
2573 read_lock_bh(&idev->lock);
2576 spin_lock_bh(&ifp->lock);
2578 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2579 !(ifp->flags&IFA_F_TENTATIVE) ||
2580 ifp->flags & IFA_F_NODAD) {
2581 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2582 spin_unlock_bh(&ifp->lock);
2583 read_unlock_bh(&idev->lock);
2585 addrconf_dad_completed(ifp);
2589 if (!(idev->if_flags & IF_READY)) {
2590 spin_unlock_bh(&ifp->lock);
2591 read_unlock_bh(&idev->lock);
2593 * If the defice is not ready:
2594 * - keep it tentative if it is a permanent address.
2595 * - otherwise, kill it.
2598 addrconf_dad_stop(ifp);
2603 * Optimistic nodes can start receiving
2606 if(ifp->flags & IFA_F_OPTIMISTIC)
2607 ip6_ins_rt(ifp->rt);
2609 addrconf_dad_kick(ifp);
2610 spin_unlock_bh(&ifp->lock);
2612 read_unlock_bh(&idev->lock);
2615 static void addrconf_dad_timer(unsigned long data)
2617 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2618 struct inet6_dev *idev = ifp->idev;
2619 struct in6_addr unspec;
2620 struct in6_addr mcaddr;
2622 read_lock_bh(&idev->lock);
2624 read_unlock_bh(&idev->lock);
2627 spin_lock_bh(&ifp->lock);
2628 if (ifp->probes == 0) {
2630 * DAD was successful
2633 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
2634 spin_unlock_bh(&ifp->lock);
2635 read_unlock_bh(&idev->lock);
2637 addrconf_dad_completed(ifp);
2643 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2644 spin_unlock_bh(&ifp->lock);
2645 read_unlock_bh(&idev->lock);
2647 /* send a neighbour solicitation for our addr */
2648 memset(&unspec, 0, sizeof(unspec));
2649 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2650 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2655 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2657 struct net_device * dev = ifp->idev->dev;
2660 * Configure the address for reception. Now it is valid.
2663 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2665 /* If added prefix is link local and forwarding is off,
2666 start sending router solicitations.
2669 if (ifp->idev->cnf.forwarding == 0 &&
2670 ifp->idev->cnf.rtr_solicits > 0 &&
2671 (dev->flags&IFF_LOOPBACK) == 0 &&
2672 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2673 struct in6_addr all_routers;
2675 ipv6_addr_all_routers(&all_routers);
2678 * If a host as already performed a random delay
2679 * [...] as part of DAD [...] there is no need
2680 * to delay again before sending the first RS
2682 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2684 spin_lock_bh(&ifp->lock);
2686 ifp->idev->if_flags |= IF_RS_SENT;
2687 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2688 spin_unlock_bh(&ifp->lock);
2692 static void addrconf_dad_run(struct inet6_dev *idev) {
2693 struct inet6_ifaddr *ifp;
2695 read_lock_bh(&idev->lock);
2696 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2697 spin_lock_bh(&ifp->lock);
2698 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2699 spin_unlock_bh(&ifp->lock);
2702 spin_unlock_bh(&ifp->lock);
2703 addrconf_dad_kick(ifp);
2705 read_unlock_bh(&idev->lock);
2708 #ifdef CONFIG_PROC_FS
2709 struct if6_iter_state {
2713 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2715 struct inet6_ifaddr *ifa = NULL;
2716 struct if6_iter_state *state = seq->private;
2718 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2719 ifa = inet6_addr_lst[state->bucket];
2726 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2728 struct if6_iter_state *state = seq->private;
2730 ifa = ifa->lst_next;
2732 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2733 ifa = inet6_addr_lst[state->bucket];
2739 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2741 struct inet6_ifaddr *ifa = if6_get_first(seq);
2744 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2746 return pos ? NULL : ifa;
2749 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2751 read_lock_bh(&addrconf_hash_lock);
2752 return if6_get_idx(seq, *pos);
2755 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2757 struct inet6_ifaddr *ifa;
2759 ifa = if6_get_next(seq, v);
2764 static void if6_seq_stop(struct seq_file *seq, void *v)
2766 read_unlock_bh(&addrconf_hash_lock);
2769 static int if6_seq_show(struct seq_file *seq, void *v)
2771 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2773 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2775 ifp->idev->dev->ifindex,
2779 ifp->idev->dev->name);
2783 static struct seq_operations if6_seq_ops = {
2784 .start = if6_seq_start,
2785 .next = if6_seq_next,
2786 .show = if6_seq_show,
2787 .stop = if6_seq_stop,
2790 static int if6_seq_open(struct inode *inode, struct file *file)
2792 struct seq_file *seq;
2794 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2799 rc = seq_open(file, &if6_seq_ops);
2803 seq = file->private_data;
2812 static const struct file_operations if6_fops = {
2813 .owner = THIS_MODULE,
2814 .open = if6_seq_open,
2816 .llseek = seq_lseek,
2817 .release = seq_release_private,
2820 int __init if6_proc_init(void)
2822 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2827 void if6_proc_exit(void)
2829 proc_net_remove("if_inet6");
2831 #endif /* CONFIG_PROC_FS */
2833 #ifdef CONFIG_IPV6_MIP6
2834 /* Check if address is a home address configured on any interface. */
2835 int ipv6_chk_home_addr(struct in6_addr *addr)
2838 struct inet6_ifaddr * ifp;
2839 u8 hash = ipv6_addr_hash(addr);
2840 read_lock_bh(&addrconf_hash_lock);
2841 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2842 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2843 (ifp->flags & IFA_F_HOMEADDRESS)) {
2848 read_unlock_bh(&addrconf_hash_lock);
2854 * Periodic address status verification
2857 static void addrconf_verify(unsigned long foo)
2859 struct inet6_ifaddr *ifp;
2860 unsigned long now, next;
2863 spin_lock_bh(&addrconf_verify_lock);
2865 next = now + ADDR_CHECK_FREQUENCY;
2867 del_timer(&addr_chk_timer);
2869 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2872 read_lock(&addrconf_hash_lock);
2873 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2875 #ifdef CONFIG_IPV6_PRIVACY
2876 unsigned long regen_advance;
2879 if (ifp->flags & IFA_F_PERMANENT)
2882 spin_lock(&ifp->lock);
2883 age = (now - ifp->tstamp) / HZ;
2885 #ifdef CONFIG_IPV6_PRIVACY
2886 regen_advance = ifp->idev->cnf.regen_max_retry *
2887 ifp->idev->cnf.dad_transmits *
2888 ifp->idev->nd_parms->retrans_time / HZ;
2891 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2892 age >= ifp->valid_lft) {
2893 spin_unlock(&ifp->lock);
2895 read_unlock(&addrconf_hash_lock);
2898 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2899 spin_unlock(&ifp->lock);
2901 } else if (age >= ifp->prefered_lft) {
2902 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2905 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2907 ifp->flags |= IFA_F_DEPRECATED;
2910 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2911 next = ifp->tstamp + ifp->valid_lft * HZ;
2913 spin_unlock(&ifp->lock);
2917 read_unlock(&addrconf_hash_lock);
2919 ipv6_ifa_notify(0, ifp);
2923 #ifdef CONFIG_IPV6_PRIVACY
2924 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2925 !(ifp->flags&IFA_F_TENTATIVE)) {
2926 if (age >= ifp->prefered_lft - regen_advance) {
2927 struct inet6_ifaddr *ifpub = ifp->ifpub;
2928 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2929 next = ifp->tstamp + ifp->prefered_lft * HZ;
2930 if (!ifp->regen_count && ifpub) {
2933 in6_ifa_hold(ifpub);
2934 spin_unlock(&ifp->lock);
2935 read_unlock(&addrconf_hash_lock);
2936 spin_lock(&ifpub->lock);
2937 ifpub->regen_count = 0;
2938 spin_unlock(&ifpub->lock);
2939 ipv6_create_tempaddr(ifpub, ifp);
2944 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2945 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2946 spin_unlock(&ifp->lock);
2949 /* ifp->prefered_lft <= ifp->valid_lft */
2950 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2951 next = ifp->tstamp + ifp->prefered_lft * HZ;
2952 spin_unlock(&ifp->lock);
2955 read_unlock(&addrconf_hash_lock);
2958 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2959 add_timer(&addr_chk_timer);
2960 spin_unlock_bh(&addrconf_verify_lock);
2963 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2965 struct in6_addr *pfx = NULL;
2968 pfx = nla_data(addr);
2971 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2974 pfx = nla_data(local);
2980 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2981 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2982 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2983 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2987 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2989 struct ifaddrmsg *ifm;
2990 struct nlattr *tb[IFA_MAX+1];
2991 struct in6_addr *pfx;
2994 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2998 ifm = nlmsg_data(nlh);
2999 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3003 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3006 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3007 u32 prefered_lft, u32 valid_lft)
3009 u32 flags = RTF_EXPIRES;
3011 if (!valid_lft || (prefered_lft > valid_lft))
3014 if (valid_lft == INFINITY_LIFE_TIME) {
3015 ifa_flags |= IFA_F_PERMANENT;
3017 } else if (valid_lft >= 0x7FFFFFFF/HZ)
3018 valid_lft = 0x7FFFFFFF/HZ;
3020 if (prefered_lft == 0)
3021 ifa_flags |= IFA_F_DEPRECATED;
3022 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3023 (prefered_lft != INFINITY_LIFE_TIME))
3024 prefered_lft = 0x7FFFFFFF/HZ;
3026 spin_lock_bh(&ifp->lock);
3027 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3028 ifp->tstamp = jiffies;
3029 ifp->valid_lft = valid_lft;
3030 ifp->prefered_lft = prefered_lft;
3032 spin_unlock_bh(&ifp->lock);
3033 if (!(ifp->flags&IFA_F_TENTATIVE))
3034 ipv6_ifa_notify(0, ifp);
3036 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3037 jiffies_to_clock_t(valid_lft * HZ), flags);
3044 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3046 struct ifaddrmsg *ifm;
3047 struct nlattr *tb[IFA_MAX+1];
3048 struct in6_addr *pfx;
3049 struct inet6_ifaddr *ifa;
3050 struct net_device *dev;
3051 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3055 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3059 ifm = nlmsg_data(nlh);
3060 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3064 if (tb[IFA_CACHEINFO]) {
3065 struct ifa_cacheinfo *ci;
3067 ci = nla_data(tb[IFA_CACHEINFO]);
3068 valid_lft = ci->ifa_valid;
3069 preferred_lft = ci->ifa_prefered;
3071 preferred_lft = INFINITY_LIFE_TIME;
3072 valid_lft = INFINITY_LIFE_TIME;
3075 dev = __dev_get_by_index(ifm->ifa_index);
3079 /* We ignore other flags so far. */
3080 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3082 ifa = ipv6_get_ifaddr(pfx, dev, 1);
3085 * It would be best to check for !NLM_F_CREATE here but
3086 * userspace alreay relies on not having to provide this.
3088 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
3089 ifa_flags, preferred_lft, valid_lft);
3092 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3093 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3096 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3103 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3104 u8 scope, int ifindex)
3106 struct ifaddrmsg *ifm;
3108 ifm = nlmsg_data(nlh);
3109 ifm->ifa_family = AF_INET6;
3110 ifm->ifa_prefixlen = prefixlen;
3111 ifm->ifa_flags = flags;
3112 ifm->ifa_scope = scope;
3113 ifm->ifa_index = ifindex;
3116 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3117 unsigned long tstamp, u32 preferred, u32 valid)
3119 struct ifa_cacheinfo ci;
3121 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3122 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3123 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3124 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3125 ci.ifa_prefered = preferred;
3126 ci.ifa_valid = valid;
3128 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3131 static inline int rt_scope(int ifa_scope)
3133 if (ifa_scope & IFA_HOST)
3134 return RT_SCOPE_HOST;
3135 else if (ifa_scope & IFA_LINK)
3136 return RT_SCOPE_LINK;
3137 else if (ifa_scope & IFA_SITE)
3138 return RT_SCOPE_SITE;
3140 return RT_SCOPE_UNIVERSE;
3143 static inline int inet6_ifaddr_msgsize(void)
3145 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3146 + nla_total_size(16) /* IFA_ADDRESS */
3147 + nla_total_size(sizeof(struct ifa_cacheinfo));
3150 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3151 u32 pid, u32 seq, int event, unsigned int flags)
3153 struct nlmsghdr *nlh;
3154 u32 preferred, valid;
3156 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3160 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3161 ifa->idev->dev->ifindex);
3163 if (!(ifa->flags&IFA_F_PERMANENT)) {
3164 preferred = ifa->prefered_lft;
3165 valid = ifa->valid_lft;
3166 if (preferred != INFINITY_LIFE_TIME) {
3167 long tval = (jiffies - ifa->tstamp)/HZ;
3169 if (valid != INFINITY_LIFE_TIME)
3173 preferred = INFINITY_LIFE_TIME;
3174 valid = INFINITY_LIFE_TIME;
3177 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3178 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3179 nlmsg_cancel(skb, nlh);
3183 return nlmsg_end(skb, nlh);
3186 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3187 u32 pid, u32 seq, int event, u16 flags)
3189 struct nlmsghdr *nlh;
3190 u8 scope = RT_SCOPE_UNIVERSE;
3191 int ifindex = ifmca->idev->dev->ifindex;
3193 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3194 scope = RT_SCOPE_SITE;
3196 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3200 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3201 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3202 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3203 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3204 nlmsg_cancel(skb, nlh);
3208 return nlmsg_end(skb, nlh);
3211 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3212 u32 pid, u32 seq, int event, unsigned int flags)
3214 struct nlmsghdr *nlh;
3215 u8 scope = RT_SCOPE_UNIVERSE;
3216 int ifindex = ifaca->aca_idev->dev->ifindex;
3218 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3219 scope = RT_SCOPE_SITE;
3221 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3225 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3226 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3227 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3228 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3229 nlmsg_cancel(skb, nlh);
3233 return nlmsg_end(skb, nlh);
3243 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3244 enum addr_type_t type)
3247 int s_idx, s_ip_idx;
3249 struct net_device *dev;
3250 struct inet6_dev *idev = NULL;
3251 struct inet6_ifaddr *ifa;
3252 struct ifmcaddr6 *ifmca;
3253 struct ifacaddr6 *ifaca;
3255 s_idx = cb->args[0];
3256 s_ip_idx = ip_idx = cb->args[1];
3258 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3264 if ((idev = in6_dev_get(dev)) == NULL)
3266 read_lock_bh(&idev->lock);
3269 /* unicast address incl. temp addr */
3270 for (ifa = idev->addr_list; ifa;
3271 ifa = ifa->if_next, ip_idx++) {
3272 if (ip_idx < s_ip_idx)
3274 if ((err = inet6_fill_ifaddr(skb, ifa,
3275 NETLINK_CB(cb->skb).pid,
3276 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3281 case MULTICAST_ADDR:
3282 /* multicast address */
3283 for (ifmca = idev->mc_list; ifmca;
3284 ifmca = ifmca->next, ip_idx++) {
3285 if (ip_idx < s_ip_idx)
3287 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3288 NETLINK_CB(cb->skb).pid,
3289 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3295 /* anycast address */
3296 for (ifaca = idev->ac_list; ifaca;
3297 ifaca = ifaca->aca_next, ip_idx++) {
3298 if (ip_idx < s_ip_idx)
3300 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3301 NETLINK_CB(cb->skb).pid,
3302 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3310 read_unlock_bh(&idev->lock);
3315 read_unlock_bh(&idev->lock);
3319 cb->args[1] = ip_idx;
3323 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3325 enum addr_type_t type = UNICAST_ADDR;
3326 return inet6_dump_addr(skb, cb, type);
3329 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3331 enum addr_type_t type = MULTICAST_ADDR;
3332 return inet6_dump_addr(skb, cb, type);
3336 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3338 enum addr_type_t type = ANYCAST_ADDR;
3339 return inet6_dump_addr(skb, cb, type);
3342 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3345 struct ifaddrmsg *ifm;
3346 struct nlattr *tb[IFA_MAX+1];
3347 struct in6_addr *addr = NULL;
3348 struct net_device *dev = NULL;
3349 struct inet6_ifaddr *ifa;
3350 struct sk_buff *skb;
3353 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3357 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3363 ifm = nlmsg_data(nlh);
3365 dev = __dev_get_by_index(ifm->ifa_index);
3367 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3368 err = -EADDRNOTAVAIL;
3372 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3377 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3378 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3380 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3381 WARN_ON(err == -EMSGSIZE);
3385 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3392 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3394 struct sk_buff *skb;
3397 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3401 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3403 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3404 WARN_ON(err == -EMSGSIZE);
3408 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3411 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3414 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
3415 __s32 *array, int bytes)
3417 BUG_ON(bytes < (DEVCONF_MAX * 4));
3419 memset(array, 0, bytes);
3420 array[DEVCONF_FORWARDING] = cnf->forwarding;
3421 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3422 array[DEVCONF_MTU6] = cnf->mtu6;
3423 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3424 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3425 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3426 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3427 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3428 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3429 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3430 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3431 #ifdef CONFIG_IPV6_PRIVACY
3432 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3433 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3434 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3435 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3436 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3438 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3439 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3440 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3441 #ifdef CONFIG_IPV6_ROUTER_PREF
3442 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3443 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3444 #ifdef CONFIG_IPV6_ROUTE_INFO
3445 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3448 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
3449 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
3450 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3451 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3455 static inline size_t inet6_if_nlmsg_size(void)
3457 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3458 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3459 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3460 + nla_total_size(4) /* IFLA_MTU */
3461 + nla_total_size(4) /* IFLA_LINK */
3462 + nla_total_size( /* IFLA_PROTINFO */
3463 nla_total_size(4) /* IFLA_INET6_FLAGS */
3464 + nla_total_size(sizeof(struct ifla_cacheinfo))
3465 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3466 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3467 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3471 static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3475 int pad = bytes - sizeof(u64) * items;
3478 /* Use put_unaligned() because stats may not be aligned for u64. */
3479 put_unaligned(items, &stats[0]);
3480 for (i = 1; i < items; i++)
3481 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3483 memset(&stats[items], 0, pad);
3486 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3490 case IFLA_INET6_STATS:
3491 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3493 case IFLA_INET6_ICMP6STATS:
3494 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3499 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3500 u32 pid, u32 seq, int event, unsigned int flags)
3502 struct net_device *dev = idev->dev;
3504 struct ifinfomsg *hdr;
3505 struct nlmsghdr *nlh;
3507 struct ifla_cacheinfo ci;
3509 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3513 hdr = nlmsg_data(nlh);
3514 hdr->ifi_family = AF_INET6;
3516 hdr->ifi_type = dev->type;
3517 hdr->ifi_index = dev->ifindex;
3518 hdr->ifi_flags = dev_get_flags(dev);
3519 hdr->ifi_change = 0;
3521 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3524 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3526 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3527 if (dev->ifindex != dev->iflink)
3528 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3530 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3531 if (protoinfo == NULL)
3532 goto nla_put_failure;
3534 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3536 ci.max_reasm_len = IPV6_MAXPLEN;
3537 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3538 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3539 ci.reachable_time = idev->nd_parms->reachable_time;
3540 ci.retrans_time = idev->nd_parms->retrans_time;
3541 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3543 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3545 goto nla_put_failure;
3546 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
3548 /* XXX - MC not implemented */
3550 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3552 goto nla_put_failure;
3553 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3555 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3557 goto nla_put_failure;
3558 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
3560 nla_nest_end(skb, protoinfo);
3561 return nlmsg_end(skb, nlh);
3564 nlmsg_cancel(skb, nlh);
3568 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3571 int s_idx = cb->args[0];
3572 struct net_device *dev;
3573 struct inet6_dev *idev;
3575 read_lock(&dev_base_lock);
3576 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3579 if ((idev = in6_dev_get(dev)) == NULL)
3581 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3582 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3587 read_unlock(&dev_base_lock);
3593 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3595 struct sk_buff *skb;
3598 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3602 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3604 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3605 WARN_ON(err == -EMSGSIZE);
3609 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3612 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3615 static inline size_t inet6_prefix_nlmsg_size(void)
3617 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3618 + nla_total_size(sizeof(struct in6_addr))
3619 + nla_total_size(sizeof(struct prefix_cacheinfo));
3622 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3623 struct prefix_info *pinfo, u32 pid, u32 seq,
3624 int event, unsigned int flags)
3626 struct prefixmsg *pmsg;
3627 struct nlmsghdr *nlh;
3628 struct prefix_cacheinfo ci;
3630 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3634 pmsg = nlmsg_data(nlh);
3635 pmsg->prefix_family = AF_INET6;
3636 pmsg->prefix_pad1 = 0;
3637 pmsg->prefix_pad2 = 0;
3638 pmsg->prefix_ifindex = idev->dev->ifindex;
3639 pmsg->prefix_len = pinfo->prefix_len;
3640 pmsg->prefix_type = pinfo->type;
3641 pmsg->prefix_pad3 = 0;
3642 pmsg->prefix_flags = 0;
3644 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3645 if (pinfo->autoconf)
3646 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3648 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3650 ci.preferred_time = ntohl(pinfo->prefered);
3651 ci.valid_time = ntohl(pinfo->valid);
3652 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3654 return nlmsg_end(skb, nlh);
3657 nlmsg_cancel(skb, nlh);
3661 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3662 struct prefix_info *pinfo)
3664 struct sk_buff *skb;
3667 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3671 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3673 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3674 WARN_ON(err == -EMSGSIZE);
3678 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3681 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3684 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3686 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3691 * If the address was optimistic
3692 * we inserted the route at the start of
3693 * our DAD process, so we don't need
3696 if (!(ifp->rt->rt6i_node))
3697 ip6_ins_rt(ifp->rt);
3698 if (ifp->idev->cnf.forwarding)
3699 addrconf_join_anycast(ifp);
3702 if (ifp->idev->cnf.forwarding)
3703 addrconf_leave_anycast(ifp);
3704 addrconf_leave_solict(ifp->idev, &ifp->addr);
3705 dst_hold(&ifp->rt->u.dst);
3706 if (ip6_del_rt(ifp->rt))
3707 dst_free(&ifp->rt->u.dst);
3712 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3715 if (likely(ifp->idev->dead == 0))
3716 __ipv6_ifa_notify(event, ifp);
3717 rcu_read_unlock_bh();
3720 #ifdef CONFIG_SYSCTL
3723 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3724 void __user *buffer, size_t *lenp, loff_t *ppos)
3726 int *valp = ctl->data;
3730 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3732 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3733 if (valp != &ipv6_devconf.forwarding) {
3734 if ((!*valp) ^ (!val)) {
3735 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3738 dev_forward_change(idev);
3741 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3742 addrconf_forward_change();
3745 rt6_purge_dflt_routers();
3751 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3752 int __user *name, int nlen,
3753 void __user *oldval,
3754 size_t __user *oldlenp,
3755 void __user *newval, size_t newlen)
3757 int *valp = table->data;
3760 if (!newval || !newlen)
3762 if (newlen != sizeof(int))
3764 if (get_user(new, (int __user *)newval))
3768 if (oldval && oldlenp) {
3770 if (get_user(len, oldlenp))
3773 if (len > table->maxlen)
3774 len = table->maxlen;
3775 if (copy_to_user(oldval, valp, len))
3777 if (put_user(len, oldlenp))
3782 if (valp != &ipv6_devconf_dflt.forwarding) {
3783 if (valp != &ipv6_devconf.forwarding) {
3784 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3786 if (unlikely(idev == NULL))
3788 changed = (!*valp) ^ (!new);
3791 dev_forward_change(idev);
3794 addrconf_forward_change();
3798 rt6_purge_dflt_routers();
3805 static struct addrconf_sysctl_table
3807 struct ctl_table_header *sysctl_header;
3808 ctl_table addrconf_vars[__NET_IPV6_MAX];
3809 ctl_table addrconf_dev[2];
3810 ctl_table addrconf_conf_dir[2];
3811 ctl_table addrconf_proto_dir[2];
3812 ctl_table addrconf_root_dir[2];
3813 } addrconf_sysctl __read_mostly = {
3814 .sysctl_header = NULL,
3817 .ctl_name = NET_IPV6_FORWARDING,
3818 .procname = "forwarding",
3819 .data = &ipv6_devconf.forwarding,
3820 .maxlen = sizeof(int),
3822 .proc_handler = &addrconf_sysctl_forward,
3823 .strategy = &addrconf_sysctl_forward_strategy,
3826 .ctl_name = NET_IPV6_HOP_LIMIT,
3827 .procname = "hop_limit",
3828 .data = &ipv6_devconf.hop_limit,
3829 .maxlen = sizeof(int),
3831 .proc_handler = proc_dointvec,
3834 .ctl_name = NET_IPV6_MTU,
3836 .data = &ipv6_devconf.mtu6,
3837 .maxlen = sizeof(int),
3839 .proc_handler = &proc_dointvec,
3842 .ctl_name = NET_IPV6_ACCEPT_RA,
3843 .procname = "accept_ra",
3844 .data = &ipv6_devconf.accept_ra,
3845 .maxlen = sizeof(int),
3847 .proc_handler = &proc_dointvec,
3850 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3851 .procname = "accept_redirects",
3852 .data = &ipv6_devconf.accept_redirects,
3853 .maxlen = sizeof(int),
3855 .proc_handler = &proc_dointvec,
3858 .ctl_name = NET_IPV6_AUTOCONF,
3859 .procname = "autoconf",
3860 .data = &ipv6_devconf.autoconf,
3861 .maxlen = sizeof(int),
3863 .proc_handler = &proc_dointvec,
3866 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3867 .procname = "dad_transmits",
3868 .data = &ipv6_devconf.dad_transmits,
3869 .maxlen = sizeof(int),
3871 .proc_handler = &proc_dointvec,
3874 .ctl_name = NET_IPV6_RTR_SOLICITS,
3875 .procname = "router_solicitations",
3876 .data = &ipv6_devconf.rtr_solicits,
3877 .maxlen = sizeof(int),
3879 .proc_handler = &proc_dointvec,
3882 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3883 .procname = "router_solicitation_interval",
3884 .data = &ipv6_devconf.rtr_solicit_interval,
3885 .maxlen = sizeof(int),
3887 .proc_handler = &proc_dointvec_jiffies,
3888 .strategy = &sysctl_jiffies,
3891 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3892 .procname = "router_solicitation_delay",
3893 .data = &ipv6_devconf.rtr_solicit_delay,
3894 .maxlen = sizeof(int),
3896 .proc_handler = &proc_dointvec_jiffies,
3897 .strategy = &sysctl_jiffies,
3900 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3901 .procname = "force_mld_version",
3902 .data = &ipv6_devconf.force_mld_version,
3903 .maxlen = sizeof(int),
3905 .proc_handler = &proc_dointvec,
3907 #ifdef CONFIG_IPV6_PRIVACY
3909 .ctl_name = NET_IPV6_USE_TEMPADDR,
3910 .procname = "use_tempaddr",
3911 .data = &ipv6_devconf.use_tempaddr,
3912 .maxlen = sizeof(int),
3914 .proc_handler = &proc_dointvec,
3917 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3918 .procname = "temp_valid_lft",
3919 .data = &ipv6_devconf.temp_valid_lft,
3920 .maxlen = sizeof(int),
3922 .proc_handler = &proc_dointvec,
3925 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3926 .procname = "temp_prefered_lft",
3927 .data = &ipv6_devconf.temp_prefered_lft,
3928 .maxlen = sizeof(int),
3930 .proc_handler = &proc_dointvec,
3933 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3934 .procname = "regen_max_retry",
3935 .data = &ipv6_devconf.regen_max_retry,
3936 .maxlen = sizeof(int),
3938 .proc_handler = &proc_dointvec,
3941 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3942 .procname = "max_desync_factor",
3943 .data = &ipv6_devconf.max_desync_factor,
3944 .maxlen = sizeof(int),
3946 .proc_handler = &proc_dointvec,
3950 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3951 .procname = "max_addresses",
3952 .data = &ipv6_devconf.max_addresses,
3953 .maxlen = sizeof(int),
3955 .proc_handler = &proc_dointvec,
3958 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3959 .procname = "accept_ra_defrtr",
3960 .data = &ipv6_devconf.accept_ra_defrtr,
3961 .maxlen = sizeof(int),
3963 .proc_handler = &proc_dointvec,
3966 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3967 .procname = "accept_ra_pinfo",
3968 .data = &ipv6_devconf.accept_ra_pinfo,
3969 .maxlen = sizeof(int),
3971 .proc_handler = &proc_dointvec,
3973 #ifdef CONFIG_IPV6_ROUTER_PREF
3975 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3976 .procname = "accept_ra_rtr_pref",
3977 .data = &ipv6_devconf.accept_ra_rtr_pref,
3978 .maxlen = sizeof(int),
3980 .proc_handler = &proc_dointvec,
3983 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3984 .procname = "router_probe_interval",
3985 .data = &ipv6_devconf.rtr_probe_interval,
3986 .maxlen = sizeof(int),
3988 .proc_handler = &proc_dointvec_jiffies,
3989 .strategy = &sysctl_jiffies,
3991 #ifdef CONFIG_IPV6_ROUTE_INFO
3993 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3994 .procname = "accept_ra_rt_info_max_plen",
3995 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3996 .maxlen = sizeof(int),
3998 .proc_handler = &proc_dointvec,
4003 .ctl_name = NET_IPV6_PROXY_NDP,
4004 .procname = "proxy_ndp",
4005 .data = &ipv6_devconf.proxy_ndp,
4006 .maxlen = sizeof(int),
4008 .proc_handler = &proc_dointvec,
4011 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4012 .procname = "accept_source_route",
4013 .data = &ipv6_devconf.accept_source_route,
4014 .maxlen = sizeof(int),
4016 .proc_handler = &proc_dointvec,
4018 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4020 .ctl_name = CTL_UNNUMBERED,
4021 .procname = "optimistic_dad",
4022 .data = &ipv6_devconf.optimistic_dad,
4023 .maxlen = sizeof(int),
4025 .proc_handler = &proc_dointvec,
4030 .ctl_name = 0, /* sentinel */
4035 .ctl_name = NET_PROTO_CONF_ALL,
4038 .child = addrconf_sysctl.addrconf_vars,
4041 .ctl_name = 0, /* sentinel */
4044 .addrconf_conf_dir = {
4046 .ctl_name = NET_IPV6_CONF,
4049 .child = addrconf_sysctl.addrconf_dev,
4052 .ctl_name = 0, /* sentinel */
4055 .addrconf_proto_dir = {
4057 .ctl_name = NET_IPV6,
4060 .child = addrconf_sysctl.addrconf_conf_dir,
4063 .ctl_name = 0, /* sentinel */
4066 .addrconf_root_dir = {
4068 .ctl_name = CTL_NET,
4071 .child = addrconf_sysctl.addrconf_proto_dir,
4074 .ctl_name = 0, /* sentinel */
4079 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
4082 struct net_device *dev = idev ? idev->dev : NULL;
4083 struct addrconf_sysctl_table *t;
4084 char *dev_name = NULL;
4086 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4089 for (i=0; t->addrconf_vars[i].data; i++) {
4090 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4091 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4094 dev_name = dev->name;
4095 t->addrconf_dev[0].ctl_name = dev->ifindex;
4097 dev_name = "default";
4098 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
4102 * Make a copy of dev_name, because '.procname' is regarded as const
4103 * by sysctl and we wouldn't want anyone to change it under our feet
4104 * (see SIOCSIFNAME).
4106 dev_name = kstrdup(dev_name, GFP_KERNEL);
4110 t->addrconf_dev[0].procname = dev_name;
4112 t->addrconf_dev[0].child = t->addrconf_vars;
4113 t->addrconf_conf_dir[0].child = t->addrconf_dev;
4114 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
4115 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
4117 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
4118 if (t->sysctl_header == NULL)
4133 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
4136 struct addrconf_sysctl_table *t = p->sysctl;
4138 unregister_sysctl_table(t->sysctl_header);
4139 kfree(t->addrconf_dev[0].procname);
4151 int register_inet6addr_notifier(struct notifier_block *nb)
4153 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4156 EXPORT_SYMBOL(register_inet6addr_notifier);
4158 int unregister_inet6addr_notifier(struct notifier_block *nb)
4160 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4163 EXPORT_SYMBOL(unregister_inet6addr_notifier);
4166 * Init / cleanup code
4169 int __init addrconf_init(void)
4173 /* The addrconf netdev notifier requires that loopback_dev
4174 * has it's ipv6 private information allocated and setup
4175 * before it can bring up and give link-local addresses
4176 * to other devices which are up.
4178 * Unfortunately, loopback_dev is not necessarily the first
4179 * entry in the global dev_base list of net devices. In fact,
4180 * it is likely to be the very last entry on that list.
4181 * So this causes the notifier registry below to try and
4182 * give link-local addresses to all devices besides loopback_dev
4183 * first, then loopback_dev, which cases all the non-loopback_dev
4184 * devices to fail to get a link-local address.
4186 * So, as a temporary fix, allocate the ipv6 structure for
4187 * loopback_dev first by hand.
4188 * Longer term, all of the dependencies ipv6 has upon the loopback
4189 * device and it being up should be removed.
4192 if (!ipv6_add_dev(&loopback_dev))
4198 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4200 register_netdevice_notifier(&ipv6_dev_notf);
4204 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4208 /* Only the first call to __rtnl_register can fail */
4209 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4210 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4211 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4212 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4213 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4215 #ifdef CONFIG_SYSCTL
4216 addrconf_sysctl.sysctl_header =
4217 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
4218 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4223 unregister_netdevice_notifier(&ipv6_dev_notf);
4228 void __exit addrconf_cleanup(void)
4230 struct net_device *dev;
4231 struct inet6_dev *idev;
4232 struct inet6_ifaddr *ifa;
4235 unregister_netdevice_notifier(&ipv6_dev_notf);
4237 #ifdef CONFIG_SYSCTL
4238 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4239 addrconf_sysctl_unregister(&ipv6_devconf);
4248 for (dev=dev_base; dev; dev=dev->next) {
4249 if ((idev = __in6_dev_get(dev)) == NULL)
4251 addrconf_ifdown(dev, 1);
4253 addrconf_ifdown(&loopback_dev, 2);
4259 write_lock_bh(&addrconf_hash_lock);
4260 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4261 for (ifa=inet6_addr_lst[i]; ifa; ) {
4262 struct inet6_ifaddr *bifa;
4265 ifa = ifa->lst_next;
4266 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4267 /* Do not free it; something is wrong.
4268 Now we can investigate it with debugger.
4272 write_unlock_bh(&addrconf_hash_lock);
4274 del_timer(&addr_chk_timer);
4278 #ifdef CONFIG_PROC_FS
4279 proc_net_remove("if_inet6");