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/sched.h>
48 #include <linux/net.h>
49 #include <linux/in6.h>
50 #include <linux/netdevice.h>
51 #include <linux/if_addr.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
59 #include <linux/sysctl.h>
61 #include <linux/capability.h>
62 #include <linux/delay.h>
63 #include <linux/notifier.h>
64 #include <linux/string.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <linux/if_tunnel.h>
78 #include <linux/rtnetlink.h>
80 #ifdef CONFIG_IPV6_PRIVACY
81 #include <linux/random.h>
84 #include <asm/uaccess.h>
86 #include <linux/proc_fs.h>
87 #include <linux/seq_file.h>
89 /* Set to 3 to get tracing... */
93 #define ADBG(x) printk x
98 #define INFINITY_LIFE_TIME 0xFFFFFFFF
99 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
103 static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
106 #ifdef CONFIG_IPV6_PRIVACY
107 static int __ipv6_regen_rndid(struct inet6_dev *idev);
108 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
109 static void ipv6_regen_rndid(unsigned long data);
111 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
114 static int ipv6_count_addresses(struct inet6_dev *idev);
117 * Configured unicast address hash table
119 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
120 static DEFINE_RWLOCK(addrconf_hash_lock);
122 static void addrconf_verify(unsigned long);
124 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
125 static DEFINE_SPINLOCK(addrconf_verify_lock);
127 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
128 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
130 static int addrconf_ifdown(struct net_device *dev, int how);
132 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
133 static void addrconf_dad_timer(unsigned long data);
134 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
135 static void addrconf_dad_run(struct inet6_dev *idev);
136 static void addrconf_rs_timer(unsigned long data);
137 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
138 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
141 struct prefix_info *pinfo);
142 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
144 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
146 struct ipv6_devconf ipv6_devconf __read_mostly = {
148 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
149 .mtu6 = IPV6_MIN_MTU,
151 .accept_redirects = 1,
153 .force_mld_version = 0,
155 .rtr_solicits = MAX_RTR_SOLICITATIONS,
156 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
157 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
158 #ifdef CONFIG_IPV6_PRIVACY
160 .temp_valid_lft = TEMP_VALID_LIFETIME,
161 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
162 .regen_max_retry = REGEN_MAX_RETRY,
163 .max_desync_factor = MAX_DESYNC_FACTOR,
165 .max_addresses = IPV6_MAX_ADDRESSES,
166 .accept_ra_defrtr = 1,
167 .accept_ra_pinfo = 1,
168 #ifdef CONFIG_IPV6_ROUTER_PREF
169 .accept_ra_rtr_pref = 1,
170 .rtr_probe_interval = 60 * HZ,
171 #ifdef CONFIG_IPV6_ROUTE_INFO
172 .accept_ra_rt_info_max_plen = 0,
176 .accept_source_route = 0, /* we do not accept RH0 by default. */
179 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
181 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
182 .mtu6 = IPV6_MIN_MTU,
184 .accept_redirects = 1,
187 .rtr_solicits = MAX_RTR_SOLICITATIONS,
188 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
189 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
190 #ifdef CONFIG_IPV6_PRIVACY
192 .temp_valid_lft = TEMP_VALID_LIFETIME,
193 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
194 .regen_max_retry = REGEN_MAX_RETRY,
195 .max_desync_factor = MAX_DESYNC_FACTOR,
197 .max_addresses = IPV6_MAX_ADDRESSES,
198 .accept_ra_defrtr = 1,
199 .accept_ra_pinfo = 1,
200 #ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref = 1,
202 .rtr_probe_interval = 60 * HZ,
203 #ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen = 0,
208 .accept_source_route = 0, /* we do not accept RH0 by default. */
211 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
213 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
215 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
217 #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
219 static inline unsigned ipv6_addr_scope2type(unsigned scope)
222 case IPV6_ADDR_SCOPE_NODELOCAL:
223 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
225 case IPV6_ADDR_SCOPE_LINKLOCAL:
226 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
227 IPV6_ADDR_LINKLOCAL);
228 case IPV6_ADDR_SCOPE_SITELOCAL:
229 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
230 IPV6_ADDR_SITELOCAL);
232 return IPV6_ADDR_SCOPE_TYPE(scope);
235 int __ipv6_addr_type(const struct in6_addr *addr)
239 st = addr->s6_addr32[0];
241 /* Consider all addresses with the first three bits different of
242 000 and 111 as unicasts.
244 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
245 (st & htonl(0xE0000000)) != htonl(0xE0000000))
246 return (IPV6_ADDR_UNICAST |
247 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
249 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
251 /* addr-select 3.1 */
252 return (IPV6_ADDR_MULTICAST |
253 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
256 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
257 return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
258 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
259 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
260 return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
261 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
263 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
264 if (addr->s6_addr32[2] == 0) {
265 if (addr->s6_addr32[3] == 0)
266 return IPV6_ADDR_ANY;
268 if (addr->s6_addr32[3] == htonl(0x00000001))
269 return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
270 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
272 return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
273 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
276 if (addr->s6_addr32[2] == htonl(0x0000ffff))
277 return (IPV6_ADDR_MAPPED |
278 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
281 return (IPV6_ADDR_RESERVED |
282 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
285 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
287 if (del_timer(&ifp->timer))
291 enum addrconf_timer_t
298 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
299 enum addrconf_timer_t what,
302 if (!del_timer(&ifp->timer))
307 ifp->timer.function = addrconf_dad_timer;
310 ifp->timer.function = addrconf_rs_timer;
314 ifp->timer.expires = jiffies + when;
315 add_timer(&ifp->timer);
318 /* Nobody refers to this device, we may destroy it. */
320 static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
322 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
326 void in6_dev_finish_destroy(struct inet6_dev *idev)
328 struct net_device *dev = idev->dev;
329 BUG_TRAP(idev->addr_list==NULL);
330 BUG_TRAP(idev->mc_list==NULL);
331 #ifdef NET_REFCNT_DEBUG
332 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
336 printk("Freeing alive inet6 device %p\n", idev);
339 snmp6_free_dev(idev);
340 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
343 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
345 struct inet6_dev *ndev;
346 struct in6_addr maddr;
350 if (dev->mtu < IPV6_MIN_MTU)
353 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
358 rwlock_init(&ndev->lock);
360 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
361 ndev->cnf.mtu6 = dev->mtu;
362 ndev->cnf.sysctl = NULL;
363 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
364 if (ndev->nd_parms == NULL) {
368 /* We refer to the device */
371 if (snmp6_alloc_dev(ndev) < 0) {
373 "%s(): cannot allocate memory for statistics; dev=%s.\n",
374 __FUNCTION__, dev->name));
375 neigh_parms_release(&nd_tbl, ndev->nd_parms);
377 in6_dev_finish_destroy(ndev);
381 if (snmp6_register_dev(ndev) < 0) {
383 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
384 __FUNCTION__, dev->name));
385 neigh_parms_release(&nd_tbl, ndev->nd_parms);
387 in6_dev_finish_destroy(ndev);
391 /* One reference from device. We must do this before
392 * we invoke __ipv6_regen_rndid().
396 #ifdef CONFIG_IPV6_PRIVACY
397 init_timer(&ndev->regen_timer);
398 ndev->regen_timer.function = ipv6_regen_rndid;
399 ndev->regen_timer.data = (unsigned long) ndev;
400 if ((dev->flags&IFF_LOOPBACK) ||
401 dev->type == ARPHRD_TUNNEL ||
402 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
403 dev->type == ARPHRD_SIT ||
405 dev->type == ARPHRD_NONE) {
407 "%s: Disabled Privacy Extensions\n",
409 ndev->cnf.use_tempaddr = -1;
412 ipv6_regen_rndid((unsigned long) ndev);
416 if (netif_carrier_ok(dev))
417 ndev->if_flags |= IF_READY;
420 ipv6_mc_init_dev(ndev);
421 ndev->tstamp = jiffies;
423 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
424 NET_IPV6_NEIGH, "ipv6",
425 &ndisc_ifinfo_sysctl_change,
427 addrconf_sysctl_register(ndev, &ndev->cnf);
429 /* protected by rtnl_lock */
430 rcu_assign_pointer(dev->ip6_ptr, ndev);
432 /* Join all-node multicast group */
433 ipv6_addr_all_nodes(&maddr);
434 ipv6_dev_mc_inc(dev, &maddr);
439 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
441 struct inet6_dev *idev;
445 if ((idev = __in6_dev_get(dev)) == NULL) {
446 if ((idev = ipv6_add_dev(dev)) == NULL)
450 if (dev->flags&IFF_UP)
456 static void dev_forward_change(struct inet6_dev *idev)
458 struct net_device *dev;
459 struct inet6_ifaddr *ifa;
460 struct in6_addr addr;
465 if (dev && (dev->flags & IFF_MULTICAST)) {
466 ipv6_addr_all_routers(&addr);
468 if (idev->cnf.forwarding)
469 ipv6_dev_mc_inc(dev, &addr);
471 ipv6_dev_mc_dec(dev, &addr);
473 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
474 if (ifa->flags&IFA_F_TENTATIVE)
476 if (idev->cnf.forwarding)
477 addrconf_join_anycast(ifa);
479 addrconf_leave_anycast(ifa);
484 static void addrconf_forward_change(void)
486 struct net_device *dev;
487 struct inet6_dev *idev;
489 read_lock(&dev_base_lock);
490 for (dev=dev_base; dev; dev=dev->next) {
492 idev = __in6_dev_get(dev);
494 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
495 idev->cnf.forwarding = ipv6_devconf.forwarding;
497 dev_forward_change(idev);
501 read_unlock(&dev_base_lock);
505 /* Nobody refers to this ifaddr, destroy it */
507 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
509 BUG_TRAP(ifp->if_next==NULL);
510 BUG_TRAP(ifp->lst_next==NULL);
511 #ifdef NET_REFCNT_DEBUG
512 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
515 in6_dev_put(ifp->idev);
517 if (del_timer(&ifp->timer))
518 printk("Timer is still running, when freeing ifa=%p\n", ifp);
521 printk("Freeing alive inet6 address %p\n", ifp);
524 dst_release(&ifp->rt->u.dst);
530 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
532 struct inet6_ifaddr *ifa, **ifap;
533 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
536 * Each device address list is sorted in order of scope -
537 * global before linklocal.
539 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
540 ifap = &ifa->if_next) {
541 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
545 ifp->if_next = *ifap;
549 /* On success it returns ifp with increased reference count */
551 static struct inet6_ifaddr *
552 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
553 int scope, u32 flags)
555 struct inet6_ifaddr *ifa = NULL;
562 err = -ENODEV; /*XXX*/
566 write_lock(&addrconf_hash_lock);
568 /* Ignore adding duplicate addresses on an interface */
569 if (ipv6_chk_same_addr(addr, idev->dev)) {
570 ADBG(("ipv6_add_addr: already assigned\n"));
575 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
578 ADBG(("ipv6_add_addr: malloc failed\n"));
583 rt = addrconf_dst_alloc(idev, addr, 0);
589 ipv6_addr_copy(&ifa->addr, addr);
591 spin_lock_init(&ifa->lock);
592 init_timer(&ifa->timer);
593 ifa->timer.data = (unsigned long) ifa;
595 ifa->prefix_len = pfxlen;
596 ifa->flags = flags | IFA_F_TENTATIVE;
597 ifa->cstamp = ifa->tstamp = jiffies;
606 /* Add to big hash table */
607 hash = ipv6_addr_hash(addr);
609 ifa->lst_next = inet6_addr_lst[hash];
610 inet6_addr_lst[hash] = ifa;
612 write_unlock(&addrconf_hash_lock);
614 write_lock(&idev->lock);
615 /* Add to inet6_dev unicast addr list. */
616 ipv6_link_dev_addr(idev, ifa);
618 #ifdef CONFIG_IPV6_PRIVACY
619 if (ifa->flags&IFA_F_TEMPORARY) {
620 ifa->tmp_next = idev->tempaddr_list;
621 idev->tempaddr_list = ifa;
627 write_unlock(&idev->lock);
629 rcu_read_unlock_bh();
631 if (likely(err == 0))
632 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
640 write_unlock(&addrconf_hash_lock);
644 /* This function wants to get referenced ifp and releases it before return */
646 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
648 struct inet6_ifaddr *ifa, **ifap;
649 struct inet6_dev *idev = ifp->idev;
651 int deleted = 0, onlink = 0;
652 unsigned long expires = jiffies;
654 hash = ipv6_addr_hash(&ifp->addr);
658 write_lock_bh(&addrconf_hash_lock);
659 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
660 ifap = &ifa->lst_next) {
662 *ifap = ifa->lst_next;
664 ifa->lst_next = NULL;
668 write_unlock_bh(&addrconf_hash_lock);
670 write_lock_bh(&idev->lock);
671 #ifdef CONFIG_IPV6_PRIVACY
672 if (ifp->flags&IFA_F_TEMPORARY) {
673 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
674 ifap = &ifa->tmp_next) {
676 *ifap = ifa->tmp_next;
678 in6_ifa_put(ifp->ifpub);
682 ifa->tmp_next = NULL;
689 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
691 *ifap = ifa->if_next;
694 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
698 } else if (ifp->flags & IFA_F_PERMANENT) {
699 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
701 if (ifa->flags & IFA_F_PERMANENT) {
706 unsigned long lifetime;
711 spin_lock(&ifa->lock);
712 lifetime = min_t(unsigned long,
713 ifa->valid_lft, 0x7fffffffUL/HZ);
714 if (time_before(expires,
715 ifa->tstamp + lifetime * HZ))
716 expires = ifa->tstamp + lifetime * HZ;
717 spin_unlock(&ifa->lock);
721 ifap = &ifa->if_next;
723 write_unlock_bh(&idev->lock);
725 ipv6_ifa_notify(RTM_DELADDR, ifp);
727 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
729 addrconf_del_timer(ifp);
732 * Purge or update corresponding prefix
734 * 1) we don't purge prefix here if address was not permanent.
735 * prefix is managed by its own lifetime.
736 * 2) if there're no addresses, delete prefix.
737 * 3) if there're still other permanent address(es),
738 * corresponding prefix is still permanent.
739 * 4) otherwise, update prefix lifetime to the
740 * longest valid lifetime among the corresponding
741 * addresses on the device.
742 * Note: subsequent RA will update lifetime.
746 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
747 struct in6_addr prefix;
750 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
751 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
753 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
757 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
758 rt->rt6i_expires = expires;
759 rt->rt6i_flags |= RTF_EXPIRES;
762 dst_release(&rt->u.dst);
768 #ifdef CONFIG_IPV6_PRIVACY
769 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
771 struct inet6_dev *idev = ifp->idev;
772 struct in6_addr addr, *tmpaddr;
773 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
778 write_lock(&idev->lock);
780 spin_lock_bh(&ift->lock);
781 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
782 spin_unlock_bh(&ift->lock);
789 if (idev->cnf.use_tempaddr <= 0) {
790 write_unlock(&idev->lock);
792 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
797 spin_lock_bh(&ifp->lock);
798 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
799 idev->cnf.use_tempaddr = -1; /*XXX*/
800 spin_unlock_bh(&ifp->lock);
801 write_unlock(&idev->lock);
803 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
809 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
810 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
811 spin_unlock_bh(&ifp->lock);
812 write_unlock(&idev->lock);
814 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
820 memcpy(&addr.s6_addr[8], idev->rndid, 8);
821 tmp_valid_lft = min_t(__u32,
823 idev->cnf.temp_valid_lft);
824 tmp_prefered_lft = min_t(__u32,
826 idev->cnf.temp_prefered_lft - desync_factor / HZ);
827 tmp_plen = ifp->prefix_len;
828 max_addresses = idev->cnf.max_addresses;
829 tmp_cstamp = ifp->cstamp;
830 tmp_tstamp = ifp->tstamp;
831 spin_unlock_bh(&ifp->lock);
833 write_unlock(&idev->lock);
834 ift = !max_addresses ||
835 ipv6_count_addresses(idev) < max_addresses ?
836 ipv6_add_addr(idev, &addr, tmp_plen,
837 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
838 if (!ift || IS_ERR(ift)) {
842 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
844 write_lock(&idev->lock);
848 spin_lock_bh(&ift->lock);
850 ift->valid_lft = tmp_valid_lft;
851 ift->prefered_lft = tmp_prefered_lft;
852 ift->cstamp = tmp_cstamp;
853 ift->tstamp = tmp_tstamp;
854 spin_unlock_bh(&ift->lock);
856 addrconf_dad_start(ift, 0);
865 * Choose an appropriate source address (RFC3484)
867 struct ipv6_saddr_score {
875 #define IPV6_SADDR_SCORE_LOCAL 0x0001
876 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
877 #define IPV6_SADDR_SCORE_HOA 0x0008
878 #define IPV6_SADDR_SCORE_OIF 0x0010
879 #define IPV6_SADDR_SCORE_LABEL 0x0020
880 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
882 static int inline ipv6_saddr_preferred(int type)
884 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
885 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
890 /* static matching label */
891 static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
894 * prefix (longest match) label
895 * -----------------------------
904 if (type & IPV6_ADDR_LOOPBACK)
906 else if (type & IPV6_ADDR_COMPATv4)
908 else if (type & IPV6_ADDR_MAPPED)
910 else if (addr->s6_addr32[0] == htonl(0x20010000))
912 else if (addr->s6_addr16[0] == htons(0x2002))
914 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
919 int ipv6_dev_get_saddr(struct net_device *daddr_dev,
920 struct in6_addr *daddr, struct in6_addr *saddr, struct nx_info *nxi)
922 struct ipv6_saddr_score hiscore;
923 struct inet6_ifaddr *ifa_result = NULL;
924 int daddr_type = __ipv6_addr_type(daddr);
925 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
926 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
927 struct net_device *dev;
929 memset(&hiscore, 0, sizeof(hiscore));
931 read_lock(&dev_base_lock);
934 for (dev = dev_base; dev; dev=dev->next) {
935 struct inet6_dev *idev;
936 struct inet6_ifaddr *ifa;
938 /* Rule 0: Candidate Source Address (section 4)
939 * - multicast and link-local destination address,
940 * the set of candidate source address MUST only
941 * include addresses assigned to interfaces
942 * belonging to the same link as the outgoing
944 * (- For site-local destination addresses, the
945 * set of candidate source addresses MUST only
946 * include addresses assigned to interfaces
947 * belonging to the same site as the outgoing
950 if ((daddr_type & IPV6_ADDR_MULTICAST ||
951 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
952 daddr_dev && dev != daddr_dev)
955 idev = __in6_dev_get(dev);
959 read_lock_bh(&idev->lock);
960 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
961 struct ipv6_saddr_score score;
963 score.addr_type = __ipv6_addr_type(&ifa->addr);
965 /* Linux-VServer: only take into account addresses
966 available in guest context! */
967 if (!addr6_in_nx_info(nxi, &ifa->addr))
971 * - Tentative Address (RFC2462 section 5.4)
972 * - A tentative address is not considered
973 * "assigned to an interface" in the traditional
975 * - Candidate Source Address (section 4)
976 * - In any case, anycast addresses, multicast
977 * addresses, and the unspecified address MUST
978 * NOT be included in a candidate set.
980 if (ifa->flags & IFA_F_TENTATIVE)
982 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
983 score.addr_type & IPV6_ADDR_MULTICAST)) {
984 LIMIT_NETDEBUG(KERN_DEBUG
985 "ADDRCONF: unspecified / multicast address"
986 "assigned as unicast address on %s",
996 if (ifa_result == NULL) {
997 /* record it if the first available entry */
1001 /* Rule 1: Prefer same address */
1002 if (hiscore.rule < 1) {
1003 if (ipv6_addr_equal(&ifa_result->addr, daddr))
1004 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
1007 if (ipv6_addr_equal(&ifa->addr, daddr)) {
1008 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
1009 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
1014 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
1018 /* Rule 2: Prefer appropriate scope */
1019 if (hiscore.rule < 2) {
1020 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1023 score.scope = __ipv6_addr_src_scope(score.addr_type);
1024 if (hiscore.scope < score.scope) {
1025 if (hiscore.scope < daddr_scope) {
1030 } else if (score.scope < hiscore.scope) {
1031 if (score.scope < daddr_scope)
1032 break; /* addresses sorted by scope */
1039 /* Rule 3: Avoid deprecated address */
1040 if (hiscore.rule < 3) {
1041 if (ipv6_saddr_preferred(hiscore.addr_type) ||
1042 !(ifa_result->flags & IFA_F_DEPRECATED))
1043 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1046 if (ipv6_saddr_preferred(score.addr_type) ||
1047 !(ifa->flags & IFA_F_DEPRECATED)) {
1048 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1049 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1054 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1058 /* Rule 4: Prefer home address */
1059 #ifdef CONFIG_IPV6_MIP6
1060 if (hiscore.rule < 4) {
1061 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1062 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1065 if (ifa->flags & IFA_F_HOMEADDRESS) {
1066 score.attrs |= IPV6_SADDR_SCORE_HOA;
1067 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1072 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1076 if (hiscore.rule < 4)
1080 /* Rule 5: Prefer outgoing interface */
1081 if (hiscore.rule < 5) {
1082 if (daddr_dev == NULL ||
1083 daddr_dev == ifa_result->idev->dev)
1084 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1087 if (daddr_dev == NULL ||
1088 daddr_dev == ifa->idev->dev) {
1089 score.attrs |= IPV6_SADDR_SCORE_OIF;
1090 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1095 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1099 /* Rule 6: Prefer matching label */
1100 if (hiscore.rule < 6) {
1101 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1102 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1105 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1106 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1107 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1112 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1116 #ifdef CONFIG_IPV6_PRIVACY
1117 /* Rule 7: Prefer public address
1118 * Note: prefer temprary address if use_tempaddr >= 2
1120 if (hiscore.rule < 7) {
1121 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1122 (ifa_result->idev->cnf.use_tempaddr >= 2))
1123 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1126 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1127 (ifa->idev->cnf.use_tempaddr >= 2)) {
1128 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1129 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1134 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1138 if (hiscore.rule < 7)
1141 /* Rule 8: Use longest matching prefix */
1142 if (hiscore.rule < 8) {
1143 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1146 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1147 if (score.matchlen > hiscore.matchlen) {
1152 else if (score.matchlen < hiscore.matchlen)
1156 /* Final Rule: choose first available one */
1160 in6_ifa_put(ifa_result);
1165 read_unlock_bh(&idev->lock);
1168 read_unlock(&dev_base_lock);
1171 return -EADDRNOTAVAIL;
1173 ipv6_addr_copy(saddr, &ifa_result->addr);
1174 in6_ifa_put(ifa_result);
1179 int ipv6_get_saddr(struct dst_entry *dst,
1180 struct in6_addr *daddr, struct in6_addr *saddr, struct nx_info *nxi)
1182 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr, nxi);
1186 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1188 struct inet6_dev *idev;
1189 int err = -EADDRNOTAVAIL;
1192 if ((idev = __in6_dev_get(dev)) != NULL) {
1193 struct inet6_ifaddr *ifp;
1195 read_lock_bh(&idev->lock);
1196 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1197 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1198 ipv6_addr_copy(addr, &ifp->addr);
1203 read_unlock_bh(&idev->lock);
1209 static int ipv6_count_addresses(struct inet6_dev *idev)
1212 struct inet6_ifaddr *ifp;
1214 read_lock_bh(&idev->lock);
1215 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1217 read_unlock_bh(&idev->lock);
1221 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1223 struct inet6_ifaddr * ifp;
1224 u8 hash = ipv6_addr_hash(addr);
1226 read_lock_bh(&addrconf_hash_lock);
1227 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1228 if (ipv6_addr_equal(&ifp->addr, addr) &&
1229 !(ifp->flags&IFA_F_TENTATIVE)) {
1230 if (dev == NULL || ifp->idev->dev == dev ||
1231 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1235 read_unlock_bh(&addrconf_hash_lock);
1240 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1242 struct inet6_ifaddr * ifp;
1243 u8 hash = ipv6_addr_hash(addr);
1245 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1246 if (ipv6_addr_equal(&ifp->addr, addr)) {
1247 if (dev == NULL || ifp->idev->dev == dev)
1254 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1256 struct inet6_ifaddr * ifp;
1257 u8 hash = ipv6_addr_hash(addr);
1259 read_lock_bh(&addrconf_hash_lock);
1260 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1261 if (ipv6_addr_equal(&ifp->addr, addr)) {
1262 if (dev == NULL || ifp->idev->dev == dev ||
1263 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1269 read_unlock_bh(&addrconf_hash_lock);
1274 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1276 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1277 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1278 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1279 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1280 int sk_ipv6only = ipv6_only_sock(sk);
1281 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1282 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1283 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1285 if (sk->sk_nid != sk2->sk_nid) {
1286 // either socket is in host context and bound to everything
1287 if (sk->sk_nx_info == NULL && addr_type == IPV6_ADDR_ANY && !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1289 if (sk2->sk_nx_info == NULL && addr_type2 == IPV6_ADDR_ANY && !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1291 // If both addresses are equal
1292 if (sk2_rcv_saddr6 && ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1294 // If one socket bound to everything and the addr bound by other socket is in first context
1295 if (addr_type2 == IPV6_ADDR_ANY && !(addr_type == IPV6_ADDR_ANY || addr_type == IPV6_ADDR_MAPPED) &&
1296 addr6_in_nx_info(sk2->sk_nx_info, sk_rcv_saddr6))
1298 if (addr_type == IPV6_ADDR_ANY && !(addr_type2 == IPV6_ADDR_ANY || addr_type2 == IPV6_ADDR_MAPPED) &&
1299 sk2_rcv_saddr6 && addr6_in_nx_info(sk->sk_nx_info, sk2_rcv_saddr6))
1301 // both sockets are in guests and bound to everything with addr-overlap between guests
1302 if (sk->sk_nx_info && sk2->sk_nx_info && addr_type == IPV6_ADDR_ANY && addr_type2 == IPV6_ADDR_ANY &&
1303 nx_addr6_conflict(sk->sk_nx_info, sk2->sk_nx_info))
1305 // TODO: handle the IPv4 addresses mapped in IPv6 completely...
1307 if (!sk2_rcv_saddr && !sk_ipv6only)
1310 if (addr_type2 == IPV6_ADDR_ANY &&
1311 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1314 if (addr_type == IPV6_ADDR_ANY &&
1315 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1318 if (sk2_rcv_saddr6 &&
1319 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1322 if (addr_type == IPV6_ADDR_MAPPED &&
1324 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1330 /* Gets referenced address, destroys ifaddr */
1332 static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1334 if (ifp->flags&IFA_F_PERMANENT) {
1335 spin_lock_bh(&ifp->lock);
1336 addrconf_del_timer(ifp);
1337 ifp->flags |= IFA_F_TENTATIVE;
1338 spin_unlock_bh(&ifp->lock);
1340 #ifdef CONFIG_IPV6_PRIVACY
1341 } else if (ifp->flags&IFA_F_TEMPORARY) {
1342 struct inet6_ifaddr *ifpub;
1343 spin_lock_bh(&ifp->lock);
1346 in6_ifa_hold(ifpub);
1347 spin_unlock_bh(&ifp->lock);
1348 ipv6_create_tempaddr(ifpub, ifp);
1351 spin_unlock_bh(&ifp->lock);
1359 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1361 if (net_ratelimit())
1362 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1363 addrconf_dad_stop(ifp);
1366 /* Join to solicited addr multicast group. */
1368 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1370 struct in6_addr maddr;
1372 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1375 addrconf_addr_solict_mult(addr, &maddr);
1376 ipv6_dev_mc_inc(dev, &maddr);
1379 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1381 struct in6_addr maddr;
1383 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1386 addrconf_addr_solict_mult(addr, &maddr);
1387 __ipv6_dev_mc_dec(idev, &maddr);
1390 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1392 struct in6_addr addr;
1393 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1394 if (ipv6_addr_any(&addr))
1396 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1399 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1401 struct in6_addr addr;
1402 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1403 if (ipv6_addr_any(&addr))
1405 __ipv6_dev_ac_dec(ifp->idev, &addr);
1408 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1410 if (dev->addr_len != ETH_ALEN)
1412 memcpy(eui, dev->dev_addr, 3);
1413 memcpy(eui + 5, dev->dev_addr + 3, 3);
1416 * The zSeries OSA network cards can be shared among various
1417 * OS instances, but the OSA cards have only one MAC address.
1418 * This leads to duplicate address conflicts in conjunction
1419 * with IPv6 if more than one instance uses the same card.
1421 * The driver for these cards can deliver a unique 16-bit
1422 * identifier for each instance sharing the same card. It is
1423 * placed instead of 0xFFFE in the interface identifier. The
1424 * "u" bit of the interface identifier is not inverted in this
1425 * case. Hence the resulting interface identifier has local
1426 * scope according to RFC2373.
1429 eui[3] = (dev->dev_id >> 8) & 0xFF;
1430 eui[4] = dev->dev_id & 0xFF;
1439 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1441 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1442 if (dev->addr_len != ARCNET_ALEN)
1445 eui[7] = *(u8*)dev->dev_addr;
1449 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1451 if (dev->addr_len != INFINIBAND_ALEN)
1453 memcpy(eui, dev->dev_addr + 12, 8);
1458 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1460 switch (dev->type) {
1463 case ARPHRD_IEEE802_TR:
1464 return addrconf_ifid_eui48(eui, dev);
1466 return addrconf_ifid_arcnet(eui, dev);
1467 case ARPHRD_INFINIBAND:
1468 return addrconf_ifid_infiniband(eui, dev);
1473 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1476 struct inet6_ifaddr *ifp;
1478 read_lock_bh(&idev->lock);
1479 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1480 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1481 memcpy(eui, ifp->addr.s6_addr+8, 8);
1486 read_unlock_bh(&idev->lock);
1490 #ifdef CONFIG_IPV6_PRIVACY
1491 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1492 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1495 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1496 idev->rndid[0] &= ~0x02;
1499 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1500 * check if generated address is not inappropriate
1502 * - Reserved subnet anycast (RFC 2526)
1503 * 11111101 11....11 1xxxxxxx
1504 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1505 * 00-00-5E-FE-xx-xx-xx-xx
1507 * - XXX: already assigned to an address on the device
1509 if (idev->rndid[0] == 0xfd &&
1510 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1511 (idev->rndid[7]&0x80))
1513 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1514 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1516 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1523 static void ipv6_regen_rndid(unsigned long data)
1525 struct inet6_dev *idev = (struct inet6_dev *) data;
1526 unsigned long expires;
1529 write_lock_bh(&idev->lock);
1534 if (__ipv6_regen_rndid(idev) < 0)
1538 idev->cnf.temp_prefered_lft * HZ -
1539 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1540 if (time_before(expires, jiffies)) {
1542 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1547 if (!mod_timer(&idev->regen_timer, expires))
1551 write_unlock_bh(&idev->lock);
1552 rcu_read_unlock_bh();
1556 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1559 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1560 ret = __ipv6_regen_rndid(idev);
1570 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1571 unsigned long expires, u32 flags)
1573 struct fib6_config cfg = {
1574 .fc_table = RT6_TABLE_PREFIX,
1575 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1576 .fc_ifindex = dev->ifindex,
1577 .fc_expires = expires,
1579 .fc_flags = RTF_UP | flags,
1582 ipv6_addr_copy(&cfg.fc_dst, pfx);
1584 /* Prevent useless cloning on PtP SIT.
1585 This thing is done here expecting that the whole
1586 class of non-broadcast devices need not cloning.
1588 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1589 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1590 cfg.fc_flags |= RTF_NONEXTHOP;
1593 ip6_route_add(&cfg);
1596 /* Create "default" multicast route to the interface */
1598 static void addrconf_add_mroute(struct net_device *dev)
1600 struct fib6_config cfg = {
1601 .fc_table = RT6_TABLE_LOCAL,
1602 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1603 .fc_ifindex = dev->ifindex,
1608 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1610 ip6_route_add(&cfg);
1613 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1614 static void sit_route_add(struct net_device *dev)
1616 struct fib6_config cfg = {
1617 .fc_table = RT6_TABLE_MAIN,
1618 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1619 .fc_ifindex = dev->ifindex,
1621 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1624 /* prefix length - 96 bits "::d.d.d.d" */
1625 ip6_route_add(&cfg);
1629 static void addrconf_add_lroute(struct net_device *dev)
1631 struct in6_addr addr;
1633 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1634 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1637 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1639 struct inet6_dev *idev;
1643 if ((idev = ipv6_find_idev(dev)) == NULL)
1646 /* Add default multicast route */
1647 addrconf_add_mroute(dev);
1649 /* Add link local route */
1650 addrconf_add_lroute(dev);
1654 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1656 struct prefix_info *pinfo;
1660 unsigned long rt_expires;
1661 struct inet6_dev *in6_dev;
1663 pinfo = (struct prefix_info *) opt;
1665 if (len < sizeof(struct prefix_info)) {
1666 ADBG(("addrconf: prefix option too short\n"));
1671 * Validation checks ([ADDRCONF], page 19)
1674 addr_type = ipv6_addr_type(&pinfo->prefix);
1676 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1679 valid_lft = ntohl(pinfo->valid);
1680 prefered_lft = ntohl(pinfo->prefered);
1682 if (prefered_lft > valid_lft) {
1683 if (net_ratelimit())
1684 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1688 in6_dev = in6_dev_get(dev);
1690 if (in6_dev == NULL) {
1691 if (net_ratelimit())
1692 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1697 * Two things going on here:
1698 * 1) Add routes for on-link prefixes
1699 * 2) Configure prefixes with the auto flag set
1702 /* Avoid arithmetic overflow. Really, we could
1703 save rt_expires in seconds, likely valid_lft,
1704 but it would require division in fib gc, that it
1707 if (valid_lft >= 0x7FFFFFFF/HZ)
1708 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1710 rt_expires = valid_lft * HZ;
1713 * We convert this (in jiffies) to clock_t later.
1714 * Avoid arithmetic overflow there as well.
1715 * Overflow can happen only if HZ < USER_HZ.
1717 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1718 rt_expires = 0x7FFFFFFF / USER_HZ;
1720 if (pinfo->onlink) {
1721 struct rt6_info *rt;
1722 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1724 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1725 if (rt->rt6i_flags&RTF_EXPIRES) {
1726 if (valid_lft == 0) {
1730 rt->rt6i_expires = jiffies + rt_expires;
1733 } else if (valid_lft) {
1734 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1735 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1738 dst_release(&rt->u.dst);
1741 /* Try to figure out our local address for this prefix */
1743 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1744 struct inet6_ifaddr * ifp;
1745 struct in6_addr addr;
1746 int create = 0, update_lft = 0;
1748 if (pinfo->prefix_len == 64) {
1749 memcpy(&addr, &pinfo->prefix, 8);
1750 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1751 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1752 in6_dev_put(in6_dev);
1757 if (net_ratelimit())
1758 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1760 in6_dev_put(in6_dev);
1765 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1767 if (ifp == NULL && valid_lft) {
1768 int max_addresses = in6_dev->cnf.max_addresses;
1770 /* Do not allow to create too much of autoconfigured
1771 * addresses; this would be too easy way to crash kernel.
1773 if (!max_addresses ||
1774 ipv6_count_addresses(in6_dev) < max_addresses)
1775 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1776 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1778 if (!ifp || IS_ERR(ifp)) {
1779 in6_dev_put(in6_dev);
1783 update_lft = create = 1;
1784 ifp->cstamp = jiffies;
1785 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1791 #ifdef CONFIG_IPV6_PRIVACY
1792 struct inet6_ifaddr *ift;
1796 /* update lifetime (RFC2462 5.5.3 e) */
1797 spin_lock(&ifp->lock);
1799 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1800 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1803 if (!update_lft && stored_lft) {
1804 if (valid_lft > MIN_VALID_LIFETIME ||
1805 valid_lft > stored_lft)
1807 else if (stored_lft <= MIN_VALID_LIFETIME) {
1808 /* valid_lft <= stored_lft is always true */
1812 valid_lft = MIN_VALID_LIFETIME;
1813 if (valid_lft < prefered_lft)
1814 prefered_lft = valid_lft;
1820 ifp->valid_lft = valid_lft;
1821 ifp->prefered_lft = prefered_lft;
1824 ifp->flags &= ~IFA_F_DEPRECATED;
1825 spin_unlock(&ifp->lock);
1827 if (!(flags&IFA_F_TENTATIVE))
1828 ipv6_ifa_notify(0, ifp);
1830 spin_unlock(&ifp->lock);
1832 #ifdef CONFIG_IPV6_PRIVACY
1833 read_lock_bh(&in6_dev->lock);
1834 /* update all temporary addresses in the list */
1835 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1837 * When adjusting the lifetimes of an existing
1838 * temporary address, only lower the lifetimes.
1839 * Implementations must not increase the
1840 * lifetimes of an existing temporary address
1841 * when processing a Prefix Information Option.
1843 spin_lock(&ift->lock);
1845 if (ift->valid_lft > valid_lft &&
1846 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1847 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1848 if (ift->prefered_lft > prefered_lft &&
1849 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1850 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1851 spin_unlock(&ift->lock);
1852 if (!(flags&IFA_F_TENTATIVE))
1853 ipv6_ifa_notify(0, ift);
1856 if (create && in6_dev->cnf.use_tempaddr > 0) {
1858 * When a new public address is created as described in [ADDRCONF],
1859 * also create a new temporary address.
1861 read_unlock_bh(&in6_dev->lock);
1862 ipv6_create_tempaddr(ifp, NULL);
1864 read_unlock_bh(&in6_dev->lock);
1871 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1872 in6_dev_put(in6_dev);
1876 * Set destination address.
1877 * Special case for SIT interfaces where we create a new "virtual"
1880 int addrconf_set_dstaddr(void __user *arg)
1882 struct in6_ifreq ireq;
1883 struct net_device *dev;
1889 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1892 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1898 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1899 if (dev->type == ARPHRD_SIT) {
1902 struct ip_tunnel_parm p;
1904 err = -EADDRNOTAVAIL;
1905 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1908 memset(&p, 0, sizeof(p));
1909 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1913 p.iph.protocol = IPPROTO_IPV6;
1915 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1917 oldfs = get_fs(); set_fs(KERNEL_DS);
1918 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1923 if ((dev = __dev_get_by_name(p.name)) == NULL)
1925 err = dev_open(dev);
1936 * Manual configuration of address on an interface
1938 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1939 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1941 struct inet6_ifaddr *ifp;
1942 struct inet6_dev *idev;
1943 struct net_device *dev;
1948 /* check the lifetime */
1949 if (!valid_lft || prefered_lft > valid_lft)
1952 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1955 if ((idev = addrconf_add_dev(dev)) == NULL)
1958 scope = ipv6_addr_scope(pfx);
1960 if (valid_lft == INFINITY_LIFE_TIME)
1961 ifa_flags |= IFA_F_PERMANENT;
1962 else if (valid_lft >= 0x7FFFFFFF/HZ)
1963 valid_lft = 0x7FFFFFFF/HZ;
1965 if (prefered_lft == 0)
1966 ifa_flags |= IFA_F_DEPRECATED;
1967 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1968 (prefered_lft != INFINITY_LIFE_TIME))
1969 prefered_lft = 0x7FFFFFFF/HZ;
1971 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1974 spin_lock_bh(&ifp->lock);
1975 ifp->valid_lft = valid_lft;
1976 ifp->prefered_lft = prefered_lft;
1977 ifp->tstamp = jiffies;
1978 spin_unlock_bh(&ifp->lock);
1980 addrconf_dad_start(ifp, 0);
1986 return PTR_ERR(ifp);
1989 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1991 struct inet6_ifaddr *ifp;
1992 struct inet6_dev *idev;
1993 struct net_device *dev;
1995 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1998 if ((idev = __in6_dev_get(dev)) == NULL)
2001 read_lock_bh(&idev->lock);
2002 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2003 if (ifp->prefix_len == plen &&
2004 ipv6_addr_equal(pfx, &ifp->addr)) {
2006 read_unlock_bh(&idev->lock);
2010 /* If the last address is deleted administratively,
2011 disable IPv6 on this interface.
2013 if (idev->addr_list == NULL)
2014 addrconf_ifdown(idev->dev, 1);
2018 read_unlock_bh(&idev->lock);
2019 return -EADDRNOTAVAIL;
2023 int addrconf_add_ifaddr(void __user *arg)
2025 struct in6_ifreq ireq;
2028 if (!capable(CAP_NET_ADMIN))
2031 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2035 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
2036 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2041 int addrconf_del_ifaddr(void __user *arg)
2043 struct in6_ifreq ireq;
2046 if (!capable(CAP_NET_ADMIN))
2049 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2053 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2058 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2059 static void sit_add_v4_addrs(struct inet6_dev *idev)
2061 struct inet6_ifaddr * ifp;
2062 struct in6_addr addr;
2063 struct net_device *dev;
2068 memset(&addr, 0, sizeof(struct in6_addr));
2069 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2071 if (idev->dev->flags&IFF_POINTOPOINT) {
2072 addr.s6_addr32[0] = htonl(0xfe800000);
2075 scope = IPV6_ADDR_COMPATv4;
2078 if (addr.s6_addr32[3]) {
2079 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2081 spin_lock_bh(&ifp->lock);
2082 ifp->flags &= ~IFA_F_TENTATIVE;
2083 spin_unlock_bh(&ifp->lock);
2084 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2090 for (dev = dev_base; dev != NULL; dev = dev->next) {
2091 struct in_device * in_dev = __in_dev_get_rtnl(dev);
2092 if (in_dev && (dev->flags & IFF_UP)) {
2093 struct in_ifaddr * ifa;
2097 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2100 addr.s6_addr32[3] = ifa->ifa_local;
2102 if (ifa->ifa_scope == RT_SCOPE_LINK)
2104 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2105 if (idev->dev->flags&IFF_POINTOPOINT)
2109 if (idev->dev->flags&IFF_POINTOPOINT)
2114 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2117 spin_lock_bh(&ifp->lock);
2118 ifp->flags &= ~IFA_F_TENTATIVE;
2119 spin_unlock_bh(&ifp->lock);
2120 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2129 static void init_loopback(struct net_device *dev)
2131 struct inet6_dev *idev;
2132 struct inet6_ifaddr * ifp;
2138 if ((idev = ipv6_find_idev(dev)) == NULL) {
2139 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2143 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2145 spin_lock_bh(&ifp->lock);
2146 ifp->flags &= ~IFA_F_TENTATIVE;
2147 spin_unlock_bh(&ifp->lock);
2148 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2153 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2155 struct inet6_ifaddr * ifp;
2157 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2159 addrconf_dad_start(ifp, 0);
2164 static void addrconf_dev_config(struct net_device *dev)
2166 struct in6_addr addr;
2167 struct inet6_dev * idev;
2171 if ((dev->type != ARPHRD_ETHER) &&
2172 (dev->type != ARPHRD_FDDI) &&
2173 (dev->type != ARPHRD_IEEE802_TR) &&
2174 (dev->type != ARPHRD_ARCNET) &&
2175 (dev->type != ARPHRD_INFINIBAND)) {
2176 /* Alas, we support only Ethernet autoconfiguration. */
2180 idev = addrconf_add_dev(dev);
2184 memset(&addr, 0, sizeof(struct in6_addr));
2185 addr.s6_addr32[0] = htonl(0xFE800000);
2187 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2188 addrconf_add_linklocal(idev, &addr);
2191 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2192 static void addrconf_sit_config(struct net_device *dev)
2194 struct inet6_dev *idev;
2199 * Configure the tunnel with one of our IPv4
2200 * addresses... we should configure all of
2201 * our v4 addrs in the tunnel
2204 if ((idev = ipv6_find_idev(dev)) == NULL) {
2205 printk(KERN_DEBUG "init sit: add_dev failed\n");
2209 sit_add_v4_addrs(idev);
2211 if (dev->flags&IFF_POINTOPOINT) {
2212 addrconf_add_mroute(dev);
2213 addrconf_add_lroute(dev);
2220 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2222 struct in6_addr lladdr;
2224 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2225 addrconf_add_linklocal(idev, &lladdr);
2231 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2233 struct net_device *link_dev;
2235 /* first try to inherit the link-local address from the link device */
2236 if (idev->dev->iflink &&
2237 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2238 if (!ipv6_inherit_linklocal(idev, link_dev))
2241 /* then try to inherit it from any device */
2242 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2243 if (!ipv6_inherit_linklocal(idev, link_dev))
2246 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2250 * Autoconfigure tunnel with a link-local address so routing protocols,
2251 * DHCPv6, MLD etc. can be run over the virtual link
2254 static void addrconf_ip6_tnl_config(struct net_device *dev)
2256 struct inet6_dev *idev;
2260 if ((idev = addrconf_add_dev(dev)) == NULL) {
2261 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2264 ip6_tnl_add_linklocal(idev);
2267 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2270 struct net_device *dev = (struct net_device *) data;
2271 struct inet6_dev *idev = __in6_dev_get(dev);
2272 int run_pending = 0;
2277 if (event == NETDEV_UP) {
2278 if (!netif_carrier_ok(dev)) {
2279 /* device is not ready yet. */
2281 "ADDRCONF(NETDEV_UP): %s: "
2282 "link is not ready\n",
2288 idev->if_flags |= IF_READY;
2290 if (!netif_carrier_ok(dev)) {
2291 /* device is still not ready. */
2296 if (idev->if_flags & IF_READY) {
2297 /* device is already configured. */
2300 idev->if_flags |= IF_READY;
2304 "ADDRCONF(NETDEV_CHANGE): %s: "
2305 "link becomes ready\n",
2312 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2314 addrconf_sit_config(dev);
2317 case ARPHRD_TUNNEL6:
2318 addrconf_ip6_tnl_config(dev);
2320 case ARPHRD_LOOPBACK:
2325 addrconf_dev_config(dev);
2330 addrconf_dad_run(idev);
2332 /* If the MTU changed during the interface down, when the
2333 interface up, the changed MTU must be reflected in the
2334 idev as well as routers.
2336 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2337 rt6_mtu_change(dev, dev->mtu);
2338 idev->cnf.mtu6 = dev->mtu;
2340 idev->tstamp = jiffies;
2341 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2342 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2343 stop IPv6 on this interface.
2345 if (dev->mtu < IPV6_MIN_MTU)
2346 addrconf_ifdown(dev, event != NETDEV_DOWN);
2350 case NETDEV_CHANGEMTU:
2351 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2352 rt6_mtu_change(dev, dev->mtu);
2353 idev->cnf.mtu6 = dev->mtu;
2357 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2360 case NETDEV_UNREGISTER:
2362 * Remove all addresses from this interface.
2364 addrconf_ifdown(dev, event != NETDEV_DOWN);
2367 case NETDEV_CHANGENAME:
2368 #ifdef CONFIG_SYSCTL
2370 addrconf_sysctl_unregister(&idev->cnf);
2371 neigh_sysctl_unregister(idev->nd_parms);
2372 neigh_sysctl_register(dev, idev->nd_parms,
2373 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2374 &ndisc_ifinfo_sysctl_change,
2376 addrconf_sysctl_register(idev, &idev->cnf);
2386 * addrconf module should be notified of a device going up
2388 static struct notifier_block ipv6_dev_notf = {
2389 .notifier_call = addrconf_notify,
2393 static int addrconf_ifdown(struct net_device *dev, int how)
2395 struct inet6_dev *idev;
2396 struct inet6_ifaddr *ifa, **bifa;
2401 if (dev == &loopback_dev && how == 1)
2405 neigh_ifdown(&nd_tbl, dev);
2407 idev = __in6_dev_get(dev);
2411 /* Step 1: remove reference to ipv6 device from parent device.
2417 /* protected by rtnl_lock */
2418 rcu_assign_pointer(dev->ip6_ptr, NULL);
2420 /* Step 1.5: remove snmp6 entry */
2421 snmp6_unregister_dev(idev);
2425 /* Step 2: clear hash table */
2426 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2427 bifa = &inet6_addr_lst[i];
2429 write_lock_bh(&addrconf_hash_lock);
2430 while ((ifa = *bifa) != NULL) {
2431 if (ifa->idev == idev) {
2432 *bifa = ifa->lst_next;
2433 ifa->lst_next = NULL;
2434 addrconf_del_timer(ifa);
2438 bifa = &ifa->lst_next;
2440 write_unlock_bh(&addrconf_hash_lock);
2443 write_lock_bh(&idev->lock);
2445 /* Step 3: clear flags for stateless addrconf */
2447 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2449 /* Step 4: clear address list */
2450 #ifdef CONFIG_IPV6_PRIVACY
2451 if (how == 1 && del_timer(&idev->regen_timer))
2454 /* clear tempaddr list */
2455 while ((ifa = idev->tempaddr_list) != NULL) {
2456 idev->tempaddr_list = ifa->tmp_next;
2457 ifa->tmp_next = NULL;
2459 write_unlock_bh(&idev->lock);
2460 spin_lock_bh(&ifa->lock);
2463 in6_ifa_put(ifa->ifpub);
2466 spin_unlock_bh(&ifa->lock);
2468 write_lock_bh(&idev->lock);
2471 while ((ifa = idev->addr_list) != NULL) {
2472 idev->addr_list = ifa->if_next;
2473 ifa->if_next = NULL;
2475 addrconf_del_timer(ifa);
2476 write_unlock_bh(&idev->lock);
2478 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2481 write_lock_bh(&idev->lock);
2483 write_unlock_bh(&idev->lock);
2485 /* Step 5: Discard multicast list */
2488 ipv6_mc_destroy_dev(idev);
2492 /* Step 5: netlink notification of this interface */
2493 idev->tstamp = jiffies;
2494 inet6_ifinfo_notify(RTM_DELLINK, idev);
2496 /* Shot the device (if unregistered) */
2499 #ifdef CONFIG_SYSCTL
2500 addrconf_sysctl_unregister(&idev->cnf);
2501 neigh_sysctl_unregister(idev->nd_parms);
2503 neigh_parms_release(&nd_tbl, idev->nd_parms);
2504 neigh_ifdown(&nd_tbl, dev);
2510 static void addrconf_rs_timer(unsigned long data)
2512 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2514 if (ifp->idev->cnf.forwarding)
2517 if (ifp->idev->if_flags & IF_RA_RCVD) {
2519 * Announcement received after solicitation
2525 spin_lock(&ifp->lock);
2526 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2527 struct in6_addr all_routers;
2529 /* The wait after the last probe can be shorter */
2530 addrconf_mod_timer(ifp, AC_RS,
2531 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2532 ifp->idev->cnf.rtr_solicit_delay :
2533 ifp->idev->cnf.rtr_solicit_interval);
2534 spin_unlock(&ifp->lock);
2536 ipv6_addr_all_routers(&all_routers);
2538 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2540 spin_unlock(&ifp->lock);
2542 * Note: we do not support deprecated "all on-link"
2543 * assumption any longer.
2545 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2546 ifp->idev->dev->name);
2554 * Duplicate Address Detection
2556 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2558 unsigned long rand_num;
2559 struct inet6_dev *idev = ifp->idev;
2561 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2562 ifp->probes = idev->cnf.dad_transmits;
2563 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2566 static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
2568 struct inet6_dev *idev = ifp->idev;
2569 struct net_device *dev = idev->dev;
2571 addrconf_join_solict(dev, &ifp->addr);
2573 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2574 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2577 net_srandom(ifp->addr.s6_addr32[3]);
2579 read_lock_bh(&idev->lock);
2582 spin_lock_bh(&ifp->lock);
2584 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2586 !(dev->flags&IFF_MULTICAST) ||
2587 !(ifp->flags&IFA_F_TENTATIVE) ||
2588 ifp->flags & IFA_F_NODAD) {
2589 ifp->flags &= ~IFA_F_TENTATIVE;
2590 spin_unlock_bh(&ifp->lock);
2591 read_unlock_bh(&idev->lock);
2593 addrconf_dad_completed(ifp);
2597 if (!(idev->if_flags & IF_READY)) {
2598 spin_unlock_bh(&ifp->lock);
2599 read_unlock_bh(&idev->lock);
2601 * If the defice is not ready:
2602 * - keep it tentative if it is a permanent address.
2603 * - otherwise, kill it.
2606 addrconf_dad_stop(ifp);
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;
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 (dev->flags & IFF_MULTICAST) &&
2673 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2674 struct in6_addr all_routers;
2676 ipv6_addr_all_routers(&all_routers);
2679 * If a host as already performed a random delay
2680 * [...] as part of DAD [...] there is no need
2681 * to delay again before sending the first RS
2683 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2685 spin_lock_bh(&ifp->lock);
2687 ifp->idev->if_flags |= IF_RS_SENT;
2688 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2689 spin_unlock_bh(&ifp->lock);
2693 static void addrconf_dad_run(struct inet6_dev *idev) {
2694 struct inet6_ifaddr *ifp;
2696 read_lock_bh(&idev->lock);
2697 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2698 spin_lock_bh(&ifp->lock);
2699 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2700 spin_unlock_bh(&ifp->lock);
2703 spin_unlock_bh(&ifp->lock);
2704 addrconf_dad_kick(ifp);
2706 read_unlock_bh(&idev->lock);
2709 #ifdef CONFIG_PROC_FS
2710 struct if6_iter_state {
2714 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2716 struct inet6_ifaddr *ifa = NULL;
2717 struct if6_iter_state *state = seq->private;
2719 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2720 ifa = inet6_addr_lst[state->bucket];
2727 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2729 struct if6_iter_state *state = seq->private;
2731 ifa = ifa->lst_next;
2733 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2734 ifa = inet6_addr_lst[state->bucket];
2740 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2742 struct inet6_ifaddr *ifa = if6_get_first(seq);
2745 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2747 return pos ? NULL : ifa;
2750 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2752 read_lock_bh(&addrconf_hash_lock);
2753 return if6_get_idx(seq, *pos);
2756 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2758 struct inet6_ifaddr *ifa;
2760 ifa = if6_get_next(seq, v);
2765 static void if6_seq_stop(struct seq_file *seq, void *v)
2767 read_unlock_bh(&addrconf_hash_lock);
2770 static int if6_seq_show(struct seq_file *seq, void *v)
2772 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2774 /* Only addresses visible to vserver context */
2775 if (nx_check(0, VS_ADMIN|VS_WATCH) ||
2776 addr6_in_nx_info(current_nx_info(), &ifp->addr))
2778 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
2780 ifp->idev->dev->ifindex,
2784 ifp->idev->dev->name);
2788 static struct seq_operations if6_seq_ops = {
2789 .start = if6_seq_start,
2790 .next = if6_seq_next,
2791 .show = if6_seq_show,
2792 .stop = if6_seq_stop,
2795 static int if6_seq_open(struct inode *inode, struct file *file)
2797 struct seq_file *seq;
2799 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2804 rc = seq_open(file, &if6_seq_ops);
2808 seq = file->private_data;
2817 static struct file_operations if6_fops = {
2818 .owner = THIS_MODULE,
2819 .open = if6_seq_open,
2821 .llseek = seq_lseek,
2822 .release = seq_release_private,
2825 int __init if6_proc_init(void)
2827 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2832 void if6_proc_exit(void)
2834 proc_net_remove("if_inet6");
2836 #endif /* CONFIG_PROC_FS */
2838 #ifdef CONFIG_IPV6_MIP6
2839 /* Check if address is a home address configured on any interface. */
2840 int ipv6_chk_home_addr(struct in6_addr *addr)
2843 struct inet6_ifaddr * ifp;
2844 u8 hash = ipv6_addr_hash(addr);
2845 read_lock_bh(&addrconf_hash_lock);
2846 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2847 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2848 (ifp->flags & IFA_F_HOMEADDRESS)) {
2853 read_unlock_bh(&addrconf_hash_lock);
2859 * Periodic address status verification
2862 static void addrconf_verify(unsigned long foo)
2864 struct inet6_ifaddr *ifp;
2865 unsigned long now, next;
2868 spin_lock_bh(&addrconf_verify_lock);
2870 next = now + ADDR_CHECK_FREQUENCY;
2872 del_timer(&addr_chk_timer);
2874 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2877 read_lock(&addrconf_hash_lock);
2878 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2880 #ifdef CONFIG_IPV6_PRIVACY
2881 unsigned long regen_advance;
2884 if (ifp->flags & IFA_F_PERMANENT)
2887 spin_lock(&ifp->lock);
2888 age = (now - ifp->tstamp) / HZ;
2890 #ifdef CONFIG_IPV6_PRIVACY
2891 regen_advance = ifp->idev->cnf.regen_max_retry *
2892 ifp->idev->cnf.dad_transmits *
2893 ifp->idev->nd_parms->retrans_time / HZ;
2896 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2897 age >= ifp->valid_lft) {
2898 spin_unlock(&ifp->lock);
2900 read_unlock(&addrconf_hash_lock);
2903 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2904 spin_unlock(&ifp->lock);
2906 } else if (age >= ifp->prefered_lft) {
2907 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2910 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2912 ifp->flags |= IFA_F_DEPRECATED;
2915 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2916 next = ifp->tstamp + ifp->valid_lft * HZ;
2918 spin_unlock(&ifp->lock);
2922 read_unlock(&addrconf_hash_lock);
2924 ipv6_ifa_notify(0, ifp);
2928 #ifdef CONFIG_IPV6_PRIVACY
2929 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2930 !(ifp->flags&IFA_F_TENTATIVE)) {
2931 if (age >= ifp->prefered_lft - regen_advance) {
2932 struct inet6_ifaddr *ifpub = ifp->ifpub;
2933 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2934 next = ifp->tstamp + ifp->prefered_lft * HZ;
2935 if (!ifp->regen_count && ifpub) {
2938 in6_ifa_hold(ifpub);
2939 spin_unlock(&ifp->lock);
2940 read_unlock(&addrconf_hash_lock);
2941 spin_lock(&ifpub->lock);
2942 ifpub->regen_count = 0;
2943 spin_unlock(&ifpub->lock);
2944 ipv6_create_tempaddr(ifpub, ifp);
2949 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2950 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2951 spin_unlock(&ifp->lock);
2954 /* ifp->prefered_lft <= ifp->valid_lft */
2955 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2956 next = ifp->tstamp + ifp->prefered_lft * HZ;
2957 spin_unlock(&ifp->lock);
2960 read_unlock(&addrconf_hash_lock);
2963 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2964 add_timer(&addr_chk_timer);
2965 spin_unlock_bh(&addrconf_verify_lock);
2968 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2970 struct in6_addr *pfx = NULL;
2973 pfx = nla_data(addr);
2976 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2979 pfx = nla_data(local);
2985 static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2986 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2987 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2988 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2992 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2994 struct ifaddrmsg *ifm;
2995 struct nlattr *tb[IFA_MAX+1];
2996 struct in6_addr *pfx;
2999 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3003 ifm = nlmsg_data(nlh);
3004 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3008 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3011 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3012 u32 prefered_lft, u32 valid_lft)
3014 if (!valid_lft || (prefered_lft > valid_lft))
3017 if (valid_lft == INFINITY_LIFE_TIME)
3018 ifa_flags |= IFA_F_PERMANENT;
3019 else if (valid_lft >= 0x7FFFFFFF/HZ)
3020 valid_lft = 0x7FFFFFFF/HZ;
3022 if (prefered_lft == 0)
3023 ifa_flags |= IFA_F_DEPRECATED;
3024 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3025 (prefered_lft != INFINITY_LIFE_TIME))
3026 prefered_lft = 0x7FFFFFFF/HZ;
3028 spin_lock_bh(&ifp->lock);
3029 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3030 ifp->tstamp = jiffies;
3031 ifp->valid_lft = valid_lft;
3032 ifp->prefered_lft = prefered_lft;
3034 spin_unlock_bh(&ifp->lock);
3035 if (!(ifp->flags&IFA_F_TENTATIVE))
3036 ipv6_ifa_notify(0, ifp);
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 return nlmsg_cancel(skb, nlh);
3181 return nlmsg_end(skb, nlh);
3184 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3185 u32 pid, u32 seq, int event, u16 flags)
3187 struct nlmsghdr *nlh;
3188 u8 scope = RT_SCOPE_UNIVERSE;
3189 int ifindex = ifmca->idev->dev->ifindex;
3191 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3192 scope = RT_SCOPE_SITE;
3194 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3198 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3199 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3200 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3201 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
3202 return nlmsg_cancel(skb, nlh);
3204 return nlmsg_end(skb, nlh);
3207 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3208 u32 pid, u32 seq, int event, unsigned int flags)
3210 struct nlmsghdr *nlh;
3211 u8 scope = RT_SCOPE_UNIVERSE;
3212 int ifindex = ifaca->aca_idev->dev->ifindex;
3214 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3215 scope = RT_SCOPE_SITE;
3217 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3221 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3222 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3223 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3224 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
3225 return nlmsg_cancel(skb, nlh);
3227 return nlmsg_end(skb, nlh);
3237 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3238 enum addr_type_t type)
3241 int s_idx, s_ip_idx;
3243 struct net_device *dev;
3244 struct inet6_dev *idev = NULL;
3245 struct inet6_ifaddr *ifa;
3246 struct ifmcaddr6 *ifmca;
3247 struct ifacaddr6 *ifaca;
3249 /* no ipv6 inside a vserver if no addr set */
3250 if (skb->sk && skb->sk->sk_nx_info && skb->sk->sk_nx_info->nbipv6 == 0)
3253 s_idx = cb->args[0];
3254 s_ip_idx = ip_idx = cb->args[1];
3255 read_lock(&dev_base_lock);
3257 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3263 if ((idev = in6_dev_get(dev)) == NULL)
3265 read_lock_bh(&idev->lock);
3268 /* unicast address incl. temp addr */
3269 for (ifa = idev->addr_list; ifa;
3270 ifa = ifa->if_next, ip_idx++) {
3271 if (ip_idx < s_ip_idx)
3273 if (skb->sk && skb->sk->sk_nx_info && !addr6_in_nx_info(skb->sk->sk_nx_info, &ifa->addr))
3274 continue; /* Skip addresses not in nx */
3275 if ((err = inet6_fill_ifaddr(skb, ifa,
3276 NETLINK_CB(cb->skb).pid,
3277 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3282 case MULTICAST_ADDR:
3283 /* multicast address */
3284 for (ifmca = idev->mc_list; ifmca;
3285 ifmca = ifmca->next, ip_idx++) {
3286 if (ip_idx < s_ip_idx)
3288 if (skb->sk && skb->sk->sk_nx_info && !addr6_in_nx_info(skb->sk->sk_nx_info, &ifmca->mca_addr))
3289 continue; /* Skip addresses not in nx */
3290 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3291 NETLINK_CB(cb->skb).pid,
3292 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3298 /* anycast address */
3299 for (ifaca = idev->ac_list; ifaca;
3300 ifaca = ifaca->aca_next, ip_idx++) {
3301 if (ip_idx < s_ip_idx)
3303 if (skb->sk && skb->sk->sk_nx_info && !addr6_in_nx_info(skb->sk->sk_nx_info, &ifaca->aca_addr))
3304 continue; /* Skip addresses not in nx */
3305 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3306 NETLINK_CB(cb->skb).pid,
3307 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3315 read_unlock_bh(&idev->lock);
3320 read_unlock_bh(&idev->lock);
3323 read_unlock(&dev_base_lock);
3325 cb->args[1] = ip_idx;
3329 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3331 enum addr_type_t type = UNICAST_ADDR;
3332 return inet6_dump_addr(skb, cb, type);
3335 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3337 enum addr_type_t type = MULTICAST_ADDR;
3338 return inet6_dump_addr(skb, cb, type);
3342 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3344 enum addr_type_t type = ANYCAST_ADDR;
3345 return inet6_dump_addr(skb, cb, type);
3348 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3351 struct ifaddrmsg *ifm;
3352 struct nlattr *tb[IFA_MAX+1];
3353 struct in6_addr *addr = NULL;
3354 struct net_device *dev = NULL;
3355 struct inet6_ifaddr *ifa;
3356 struct sk_buff *skb;
3359 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3363 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3369 ifm = nlmsg_data(nlh);
3371 dev = __dev_get_by_index(ifm->ifa_index);
3373 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3374 err = -EADDRNOTAVAIL;
3378 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
3383 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3384 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3385 /* failure implies BUG in inet6_ifaddr_msgsize() */
3388 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
3395 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3397 struct sk_buff *skb;
3400 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
3404 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3405 /* failure implies BUG in inet6_ifaddr_msgsize() */
3408 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3411 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3414 static void inline 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;
3452 static inline size_t inet6_if_nlmsg_size(void)
3454 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3455 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3456 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3457 + nla_total_size(4) /* IFLA_MTU */
3458 + nla_total_size(4) /* IFLA_LINK */
3459 + nla_total_size( /* IFLA_PROTINFO */
3460 nla_total_size(4) /* IFLA_INET6_FLAGS */
3461 + nla_total_size(sizeof(struct ifla_cacheinfo))
3462 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3466 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3467 u32 pid, u32 seq, int event, unsigned int flags)
3469 struct net_device *dev = idev->dev;
3470 struct nlattr *conf;
3471 struct ifinfomsg *hdr;
3472 struct nlmsghdr *nlh;
3474 struct ifla_cacheinfo ci;
3476 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3480 hdr = nlmsg_data(nlh);
3481 hdr->ifi_family = AF_INET6;
3483 hdr->ifi_type = dev->type;
3484 hdr->ifi_index = dev->ifindex;
3485 hdr->ifi_flags = dev_get_flags(dev);
3486 hdr->ifi_change = 0;
3488 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
3491 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3493 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
3494 if (dev->ifindex != dev->iflink)
3495 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
3497 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3498 if (protoinfo == NULL)
3499 goto nla_put_failure;
3501 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
3503 ci.max_reasm_len = IPV6_MAXPLEN;
3504 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3505 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3506 ci.reachable_time = idev->nd_parms->reachable_time;
3507 ci.retrans_time = idev->nd_parms->retrans_time;
3508 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3510 conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3512 goto nla_put_failure;
3513 ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf));
3515 /* XXX - Statistics/MC not implemented */
3517 nla_nest_end(skb, protoinfo);
3518 return nlmsg_end(skb, nlh);
3521 return nlmsg_cancel(skb, nlh);
3524 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3527 int s_idx = cb->args[0];
3528 struct net_device *dev;
3529 struct inet6_dev *idev;
3531 /* no ipv6 inside a vserver if no addr set */
3532 if (skb->sk && skb->sk->sk_nx_info && skb->sk->sk_nx_info->nbipv6 == 0)
3535 read_lock(&dev_base_lock);
3536 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3539 if (skb->sk && skb->sk->sk_nx_info && !ipv6_dev_in_nx_info6(dev, skb->sk->sk_nx_info))
3541 if ((idev = in6_dev_get(dev)) == NULL)
3543 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
3544 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
3549 read_unlock(&dev_base_lock);
3555 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3557 struct sk_buff *skb;
3560 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
3564 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3565 /* failure implies BUG in inet6_if_nlmsg_size() */
3568 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3571 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
3574 static inline size_t inet6_prefix_nlmsg_size(void)
3576 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3577 + nla_total_size(sizeof(struct in6_addr))
3578 + nla_total_size(sizeof(struct prefix_cacheinfo));
3581 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
3582 struct prefix_info *pinfo, u32 pid, u32 seq,
3583 int event, unsigned int flags)
3585 struct prefixmsg *pmsg;
3586 struct nlmsghdr *nlh;
3587 struct prefix_cacheinfo ci;
3589 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3593 pmsg = nlmsg_data(nlh);
3594 pmsg->prefix_family = AF_INET6;
3595 pmsg->prefix_pad1 = 0;
3596 pmsg->prefix_pad2 = 0;
3597 pmsg->prefix_ifindex = idev->dev->ifindex;
3598 pmsg->prefix_len = pinfo->prefix_len;
3599 pmsg->prefix_type = pinfo->type;
3600 pmsg->prefix_pad3 = 0;
3601 pmsg->prefix_flags = 0;
3603 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3604 if (pinfo->autoconf)
3605 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3607 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3609 ci.preferred_time = ntohl(pinfo->prefered);
3610 ci.valid_time = ntohl(pinfo->valid);
3611 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3613 return nlmsg_end(skb, nlh);
3616 return nlmsg_cancel(skb, nlh);
3619 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3620 struct prefix_info *pinfo)
3622 struct sk_buff *skb;
3625 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
3629 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3630 /* failure implies BUG in inet6_prefix_nlmsg_size() */
3633 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3636 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
3639 static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
3640 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3641 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3642 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3643 [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr,
3644 .dumpit = inet6_dump_ifaddr, },
3645 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3646 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3647 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3648 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3649 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3650 .dumpit = inet6_dump_fib, },
3651 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3652 [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, },
3656 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3658 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3662 ip6_ins_rt(ifp->rt);
3663 if (ifp->idev->cnf.forwarding)
3664 addrconf_join_anycast(ifp);
3667 if (ifp->idev->cnf.forwarding)
3668 addrconf_leave_anycast(ifp);
3669 addrconf_leave_solict(ifp->idev, &ifp->addr);
3670 dst_hold(&ifp->rt->u.dst);
3671 if (ip6_del_rt(ifp->rt))
3672 dst_free(&ifp->rt->u.dst);
3677 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3680 if (likely(ifp->idev->dead == 0))
3681 __ipv6_ifa_notify(event, ifp);
3682 rcu_read_unlock_bh();
3685 #ifdef CONFIG_SYSCTL
3688 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3689 void __user *buffer, size_t *lenp, loff_t *ppos)
3691 int *valp = ctl->data;
3695 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3697 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3698 if (valp != &ipv6_devconf.forwarding) {
3699 if ((!*valp) ^ (!val)) {
3700 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3703 dev_forward_change(idev);
3706 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3707 addrconf_forward_change();
3710 rt6_purge_dflt_routers();
3716 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3717 int __user *name, int nlen,
3718 void __user *oldval,
3719 size_t __user *oldlenp,
3720 void __user *newval, size_t newlen)
3722 int *valp = table->data;
3725 if (!newval || !newlen)
3727 if (newlen != sizeof(int))
3729 if (get_user(new, (int __user *)newval))
3733 if (oldval && oldlenp) {
3735 if (get_user(len, oldlenp))
3738 if (len > table->maxlen)
3739 len = table->maxlen;
3740 if (copy_to_user(oldval, valp, len))
3742 if (put_user(len, oldlenp))
3747 if (valp != &ipv6_devconf_dflt.forwarding) {
3748 if (valp != &ipv6_devconf.forwarding) {
3749 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3751 if (unlikely(idev == NULL))
3753 changed = (!*valp) ^ (!new);
3756 dev_forward_change(idev);
3759 addrconf_forward_change();
3763 rt6_purge_dflt_routers();
3770 static struct addrconf_sysctl_table
3772 struct ctl_table_header *sysctl_header;
3773 ctl_table addrconf_vars[__NET_IPV6_MAX];
3774 ctl_table addrconf_dev[2];
3775 ctl_table addrconf_conf_dir[2];
3776 ctl_table addrconf_proto_dir[2];
3777 ctl_table addrconf_root_dir[2];
3778 } addrconf_sysctl __read_mostly = {
3779 .sysctl_header = NULL,
3782 .ctl_name = NET_IPV6_FORWARDING,
3783 .procname = "forwarding",
3784 .data = &ipv6_devconf.forwarding,
3785 .maxlen = sizeof(int),
3787 .proc_handler = &addrconf_sysctl_forward,
3788 .strategy = &addrconf_sysctl_forward_strategy,
3791 .ctl_name = NET_IPV6_HOP_LIMIT,
3792 .procname = "hop_limit",
3793 .data = &ipv6_devconf.hop_limit,
3794 .maxlen = sizeof(int),
3796 .proc_handler = proc_dointvec,
3799 .ctl_name = NET_IPV6_MTU,
3801 .data = &ipv6_devconf.mtu6,
3802 .maxlen = sizeof(int),
3804 .proc_handler = &proc_dointvec,
3807 .ctl_name = NET_IPV6_ACCEPT_RA,
3808 .procname = "accept_ra",
3809 .data = &ipv6_devconf.accept_ra,
3810 .maxlen = sizeof(int),
3812 .proc_handler = &proc_dointvec,
3815 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3816 .procname = "accept_redirects",
3817 .data = &ipv6_devconf.accept_redirects,
3818 .maxlen = sizeof(int),
3820 .proc_handler = &proc_dointvec,
3823 .ctl_name = NET_IPV6_AUTOCONF,
3824 .procname = "autoconf",
3825 .data = &ipv6_devconf.autoconf,
3826 .maxlen = sizeof(int),
3828 .proc_handler = &proc_dointvec,
3831 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3832 .procname = "dad_transmits",
3833 .data = &ipv6_devconf.dad_transmits,
3834 .maxlen = sizeof(int),
3836 .proc_handler = &proc_dointvec,
3839 .ctl_name = NET_IPV6_RTR_SOLICITS,
3840 .procname = "router_solicitations",
3841 .data = &ipv6_devconf.rtr_solicits,
3842 .maxlen = sizeof(int),
3844 .proc_handler = &proc_dointvec,
3847 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3848 .procname = "router_solicitation_interval",
3849 .data = &ipv6_devconf.rtr_solicit_interval,
3850 .maxlen = sizeof(int),
3852 .proc_handler = &proc_dointvec_jiffies,
3853 .strategy = &sysctl_jiffies,
3856 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3857 .procname = "router_solicitation_delay",
3858 .data = &ipv6_devconf.rtr_solicit_delay,
3859 .maxlen = sizeof(int),
3861 .proc_handler = &proc_dointvec_jiffies,
3862 .strategy = &sysctl_jiffies,
3865 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3866 .procname = "force_mld_version",
3867 .data = &ipv6_devconf.force_mld_version,
3868 .maxlen = sizeof(int),
3870 .proc_handler = &proc_dointvec,
3872 #ifdef CONFIG_IPV6_PRIVACY
3874 .ctl_name = NET_IPV6_USE_TEMPADDR,
3875 .procname = "use_tempaddr",
3876 .data = &ipv6_devconf.use_tempaddr,
3877 .maxlen = sizeof(int),
3879 .proc_handler = &proc_dointvec,
3882 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3883 .procname = "temp_valid_lft",
3884 .data = &ipv6_devconf.temp_valid_lft,
3885 .maxlen = sizeof(int),
3887 .proc_handler = &proc_dointvec,
3890 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3891 .procname = "temp_prefered_lft",
3892 .data = &ipv6_devconf.temp_prefered_lft,
3893 .maxlen = sizeof(int),
3895 .proc_handler = &proc_dointvec,
3898 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3899 .procname = "regen_max_retry",
3900 .data = &ipv6_devconf.regen_max_retry,
3901 .maxlen = sizeof(int),
3903 .proc_handler = &proc_dointvec,
3906 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3907 .procname = "max_desync_factor",
3908 .data = &ipv6_devconf.max_desync_factor,
3909 .maxlen = sizeof(int),
3911 .proc_handler = &proc_dointvec,
3915 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3916 .procname = "max_addresses",
3917 .data = &ipv6_devconf.max_addresses,
3918 .maxlen = sizeof(int),
3920 .proc_handler = &proc_dointvec,
3923 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3924 .procname = "accept_ra_defrtr",
3925 .data = &ipv6_devconf.accept_ra_defrtr,
3926 .maxlen = sizeof(int),
3928 .proc_handler = &proc_dointvec,
3931 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3932 .procname = "accept_ra_pinfo",
3933 .data = &ipv6_devconf.accept_ra_pinfo,
3934 .maxlen = sizeof(int),
3936 .proc_handler = &proc_dointvec,
3938 #ifdef CONFIG_IPV6_ROUTER_PREF
3940 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3941 .procname = "accept_ra_rtr_pref",
3942 .data = &ipv6_devconf.accept_ra_rtr_pref,
3943 .maxlen = sizeof(int),
3945 .proc_handler = &proc_dointvec,
3948 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3949 .procname = "router_probe_interval",
3950 .data = &ipv6_devconf.rtr_probe_interval,
3951 .maxlen = sizeof(int),
3953 .proc_handler = &proc_dointvec_jiffies,
3954 .strategy = &sysctl_jiffies,
3956 #ifdef CONFIG_IPV6_ROUTE_INFO
3958 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3959 .procname = "accept_ra_rt_info_max_plen",
3960 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3961 .maxlen = sizeof(int),
3963 .proc_handler = &proc_dointvec,
3968 .ctl_name = NET_IPV6_PROXY_NDP,
3969 .procname = "proxy_ndp",
3970 .data = &ipv6_devconf.proxy_ndp,
3971 .maxlen = sizeof(int),
3973 .proc_handler = &proc_dointvec,
3976 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
3977 .procname = "accept_source_route",
3978 .data = &ipv6_devconf.accept_source_route,
3979 .maxlen = sizeof(int),
3981 .proc_handler = &proc_dointvec,
3984 .ctl_name = 0, /* sentinel */
3989 .ctl_name = NET_PROTO_CONF_ALL,
3992 .child = addrconf_sysctl.addrconf_vars,
3995 .ctl_name = 0, /* sentinel */
3998 .addrconf_conf_dir = {
4000 .ctl_name = NET_IPV6_CONF,
4003 .child = addrconf_sysctl.addrconf_dev,
4006 .ctl_name = 0, /* sentinel */
4009 .addrconf_proto_dir = {
4011 .ctl_name = NET_IPV6,
4014 .child = addrconf_sysctl.addrconf_conf_dir,
4017 .ctl_name = 0, /* sentinel */
4020 .addrconf_root_dir = {
4022 .ctl_name = CTL_NET,
4025 .child = addrconf_sysctl.addrconf_proto_dir,
4028 .ctl_name = 0, /* sentinel */
4033 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
4036 struct net_device *dev = idev ? idev->dev : NULL;
4037 struct addrconf_sysctl_table *t;
4038 char *dev_name = NULL;
4040 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4043 for (i=0; t->addrconf_vars[i].data; i++) {
4044 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
4045 t->addrconf_vars[i].de = NULL;
4046 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4049 dev_name = dev->name;
4050 t->addrconf_dev[0].ctl_name = dev->ifindex;
4052 dev_name = "default";
4053 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
4057 * Make a copy of dev_name, because '.procname' is regarded as const
4058 * by sysctl and we wouldn't want anyone to change it under our feet
4059 * (see SIOCSIFNAME).
4061 dev_name = kstrdup(dev_name, GFP_KERNEL);
4065 t->addrconf_dev[0].procname = dev_name;
4067 t->addrconf_dev[0].child = t->addrconf_vars;
4068 t->addrconf_dev[0].de = NULL;
4069 t->addrconf_conf_dir[0].child = t->addrconf_dev;
4070 t->addrconf_conf_dir[0].de = NULL;
4071 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
4072 t->addrconf_proto_dir[0].de = NULL;
4073 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
4074 t->addrconf_root_dir[0].de = NULL;
4076 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
4077 if (t->sysctl_header == NULL)
4092 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
4095 struct addrconf_sysctl_table *t = p->sysctl;
4097 unregister_sysctl_table(t->sysctl_header);
4098 kfree(t->addrconf_dev[0].procname);
4110 int register_inet6addr_notifier(struct notifier_block *nb)
4112 return atomic_notifier_chain_register(&inet6addr_chain, nb);
4115 int unregister_inet6addr_notifier(struct notifier_block *nb)
4117 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
4121 * Init / cleanup code
4124 int __init addrconf_init(void)
4128 /* The addrconf netdev notifier requires that loopback_dev
4129 * has it's ipv6 private information allocated and setup
4130 * before it can bring up and give link-local addresses
4131 * to other devices which are up.
4133 * Unfortunately, loopback_dev is not necessarily the first
4134 * entry in the global dev_base list of net devices. In fact,
4135 * it is likely to be the very last entry on that list.
4136 * So this causes the notifier registry below to try and
4137 * give link-local addresses to all devices besides loopback_dev
4138 * first, then loopback_dev, which cases all the non-loopback_dev
4139 * devices to fail to get a link-local address.
4141 * So, as a temporary fix, allocate the ipv6 structure for
4142 * loopback_dev first by hand.
4143 * Longer term, all of the dependencies ipv6 has upon the loopback
4144 * device and it being up should be removed.
4147 if (!ipv6_add_dev(&loopback_dev))
4153 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4155 register_netdevice_notifier(&ipv6_dev_notf);
4158 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
4159 #ifdef CONFIG_SYSCTL
4160 addrconf_sysctl.sysctl_header =
4161 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
4162 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4168 void __exit addrconf_cleanup(void)
4170 struct net_device *dev;
4171 struct inet6_dev *idev;
4172 struct inet6_ifaddr *ifa;
4175 unregister_netdevice_notifier(&ipv6_dev_notf);
4177 rtnetlink_links[PF_INET6] = NULL;
4178 #ifdef CONFIG_SYSCTL
4179 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4180 addrconf_sysctl_unregister(&ipv6_devconf);
4189 for (dev=dev_base; dev; dev=dev->next) {
4190 if ((idev = __in6_dev_get(dev)) == NULL)
4192 addrconf_ifdown(dev, 1);
4194 addrconf_ifdown(&loopback_dev, 2);
4200 write_lock_bh(&addrconf_hash_lock);
4201 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4202 for (ifa=inet6_addr_lst[i]; ifa; ) {
4203 struct inet6_ifaddr *bifa;
4206 ifa = ifa->lst_next;
4207 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4208 /* Do not free it; something is wrong.
4209 Now we can investigate it with debugger.
4213 write_unlock_bh(&addrconf_hash_lock);
4215 del_timer(&addr_chk_timer);
4219 #ifdef CONFIG_PROC_FS
4220 proc_net_remove("if_inet6");