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
40 #include <linux/config.h>
41 #include <linux/errno.h>
42 #include <linux/types.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/sched.h>
46 #include <linux/net.h>
47 #include <linux/in6.h>
48 #include <linux/netdevice.h>
49 #include <linux/if_arp.h>
50 #include <linux/if_arcnet.h>
51 #include <linux/if_infiniband.h>
52 #include <linux/route.h>
53 #include <linux/inetdevice.h>
54 #include <linux/init.h>
56 #include <linux/sysctl.h>
58 #include <linux/delay.h>
59 #include <linux/notifier.h>
65 #include <net/protocol.h>
66 #include <net/ndisc.h>
67 #include <net/ip6_route.h>
68 #include <net/addrconf.h>
71 #include <linux/if_tunnel.h>
72 #include <linux/rtnetlink.h>
74 #ifdef CONFIG_IPV6_PRIVACY
75 #include <linux/random.h>
76 #include <linux/crypto.h>
77 #include <asm/scatterlist.h>
80 #include <asm/uaccess.h>
82 #include <linux/proc_fs.h>
83 #include <linux/seq_file.h>
85 /* Set to 3 to get tracing... */
89 #define ADBG(x) printk x
94 #define INFINITY_LIFE_TIME 0xFFFFFFFF
95 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
98 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
99 static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
102 #ifdef CONFIG_IPV6_PRIVACY
103 static int __ipv6_regen_rndid(struct inet6_dev *idev);
104 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
105 static void ipv6_regen_rndid(unsigned long data);
107 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
108 static struct crypto_tfm *md5_tfm;
109 static DEFINE_SPINLOCK(md5_tfm_lock);
112 static int ipv6_count_addresses(struct inet6_dev *idev);
115 * Configured unicast address hash table
117 static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
118 static DEFINE_RWLOCK(addrconf_hash_lock);
120 /* Protects inet6 devices */
121 DEFINE_RWLOCK(addrconf_lock);
123 static void addrconf_verify(unsigned long);
125 static struct timer_list addr_chk_timer =
126 TIMER_INITIALIZER(addrconf_verify, 0, 0);
127 static DEFINE_SPINLOCK(addrconf_verify_lock);
129 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
130 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
132 static int addrconf_ifdown(struct net_device *dev, int how);
134 static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
135 static void addrconf_dad_timer(unsigned long data);
136 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
137 static void addrconf_rs_timer(unsigned long data);
138 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
139 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
141 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
142 struct prefix_info *pinfo);
143 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
145 static struct notifier_block *inet6addr_chain;
147 struct ipv6_devconf ipv6_devconf = {
149 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
150 .mtu6 = IPV6_MIN_MTU,
152 .accept_redirects = 1,
154 .force_mld_version = 0,
156 .rtr_solicits = MAX_RTR_SOLICITATIONS,
157 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
158 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
159 #ifdef CONFIG_IPV6_PRIVACY
161 .temp_valid_lft = TEMP_VALID_LIFETIME,
162 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
163 .regen_max_retry = REGEN_MAX_RETRY,
164 .max_desync_factor = MAX_DESYNC_FACTOR,
166 .max_addresses = IPV6_MAX_ADDRESSES,
169 static struct ipv6_devconf ipv6_devconf_dflt = {
171 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
172 .mtu6 = IPV6_MIN_MTU,
174 .accept_redirects = 1,
177 .rtr_solicits = MAX_RTR_SOLICITATIONS,
178 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
179 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
180 #ifdef CONFIG_IPV6_PRIVACY
182 .temp_valid_lft = TEMP_VALID_LIFETIME,
183 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
184 .regen_max_retry = REGEN_MAX_RETRY,
185 .max_desync_factor = MAX_DESYNC_FACTOR,
187 .max_addresses = IPV6_MAX_ADDRESSES,
190 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
192 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
194 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
196 int ipv6_addr_type(const struct in6_addr *addr)
201 st = addr->s6_addr32[0];
203 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
204 type = IPV6_ADDR_MULTICAST;
206 switch((st & htonl(0x00FF0000))) {
207 case __constant_htonl(0x00010000):
208 type |= IPV6_ADDR_LOOPBACK;
211 case __constant_htonl(0x00020000):
212 type |= IPV6_ADDR_LINKLOCAL;
215 case __constant_htonl(0x00050000):
216 type |= IPV6_ADDR_SITELOCAL;
222 type = IPV6_ADDR_UNICAST;
224 /* Consider all addresses with the first three bits different of
225 000 and 111 as finished.
227 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
228 (st & htonl(0xE0000000)) != htonl(0xE0000000))
231 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
232 return (IPV6_ADDR_LINKLOCAL | type);
234 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
235 return (IPV6_ADDR_SITELOCAL | type);
237 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
238 if (addr->s6_addr32[2] == 0) {
239 if (addr->s6_addr32[3] == 0)
240 return IPV6_ADDR_ANY;
242 if (addr->s6_addr32[3] == htonl(0x00000001))
243 return (IPV6_ADDR_LOOPBACK | type);
245 return (IPV6_ADDR_COMPATv4 | type);
248 if (addr->s6_addr32[2] == htonl(0x0000ffff))
249 return IPV6_ADDR_MAPPED;
252 st &= htonl(0xFF000000);
254 return IPV6_ADDR_RESERVED;
255 st &= htonl(0xFE000000);
256 if (st == htonl(0x02000000))
257 return IPV6_ADDR_RESERVED; /* for NSAP */
258 if (st == htonl(0x04000000))
259 return IPV6_ADDR_RESERVED; /* for IPX */
263 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
265 if (del_timer(&ifp->timer))
269 enum addrconf_timer_t
276 static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
277 enum addrconf_timer_t what,
280 if (!del_timer(&ifp->timer))
285 ifp->timer.function = addrconf_dad_timer;
288 ifp->timer.function = addrconf_rs_timer;
292 ifp->timer.expires = jiffies + when;
293 add_timer(&ifp->timer);
296 /* Nobody refers to this device, we may destroy it. */
298 void in6_dev_finish_destroy(struct inet6_dev *idev)
300 struct net_device *dev = idev->dev;
301 BUG_TRAP(idev->addr_list==NULL);
302 BUG_TRAP(idev->mc_list==NULL);
303 #ifdef NET_REFCNT_DEBUG
304 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
308 printk("Freeing alive inet6 device %p\n", idev);
311 snmp6_free_dev(idev);
315 static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
317 struct inet6_dev *ndev;
321 if (dev->mtu < IPV6_MIN_MTU)
324 ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
327 memset(ndev, 0, sizeof(struct inet6_dev));
329 rwlock_init(&ndev->lock);
331 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
332 ndev->cnf.mtu6 = dev->mtu;
333 ndev->cnf.sysctl = NULL;
334 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
335 if (ndev->nd_parms == NULL) {
339 /* We refer to the device */
342 if (snmp6_alloc_dev(ndev) < 0) {
344 "%s(): cannot allocate memory for statistics; dev=%s.\n",
345 __FUNCTION__, dev->name));
346 neigh_parms_release(&nd_tbl, ndev->nd_parms);
348 in6_dev_finish_destroy(ndev);
352 if (snmp6_register_dev(ndev) < 0) {
354 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
355 __FUNCTION__, dev->name));
356 neigh_parms_release(&nd_tbl, ndev->nd_parms);
358 in6_dev_finish_destroy(ndev);
362 /* One reference from device. We must do this before
363 * we invoke __ipv6_regen_rndid().
367 #ifdef CONFIG_IPV6_PRIVACY
368 get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
369 get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
370 init_timer(&ndev->regen_timer);
371 ndev->regen_timer.function = ipv6_regen_rndid;
372 ndev->regen_timer.data = (unsigned long) ndev;
373 if ((dev->flags&IFF_LOOPBACK) ||
374 dev->type == ARPHRD_TUNNEL ||
375 dev->type == ARPHRD_SIT) {
377 "Disabled Privacy Extensions on device %p(%s)\n",
379 ndev->cnf.use_tempaddr = -1;
382 ipv6_regen_rndid((unsigned long) ndev);
386 write_lock_bh(&addrconf_lock);
388 write_unlock_bh(&addrconf_lock);
390 ipv6_mc_init_dev(ndev);
391 ndev->tstamp = jiffies;
393 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
394 NET_IPV6_NEIGH, "ipv6", &ndisc_ifinfo_sysctl_change);
395 addrconf_sysctl_register(ndev, &ndev->cnf);
401 static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
403 struct inet6_dev *idev;
407 if ((idev = __in6_dev_get(dev)) == NULL) {
408 if ((idev = ipv6_add_dev(dev)) == NULL)
411 if (dev->flags&IFF_UP)
417 static void dev_forward_change(struct inet6_dev *idev)
419 struct net_device *dev;
420 struct inet6_ifaddr *ifa;
421 struct in6_addr addr;
426 if (dev && (dev->flags & IFF_MULTICAST)) {
427 ipv6_addr_all_routers(&addr);
429 if (idev->cnf.forwarding)
430 ipv6_dev_mc_inc(dev, &addr);
432 ipv6_dev_mc_dec(dev, &addr);
434 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
435 if (idev->cnf.forwarding)
436 addrconf_join_anycast(ifa);
438 addrconf_leave_anycast(ifa);
443 static void addrconf_forward_change(void)
445 struct net_device *dev;
446 struct inet6_dev *idev;
448 read_lock(&dev_base_lock);
449 for (dev=dev_base; dev; dev=dev->next) {
450 read_lock(&addrconf_lock);
451 idev = __in6_dev_get(dev);
453 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
454 idev->cnf.forwarding = ipv6_devconf.forwarding;
456 dev_forward_change(idev);
458 read_unlock(&addrconf_lock);
460 read_unlock(&dev_base_lock);
464 /* Nobody refers to this ifaddr, destroy it */
466 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
468 BUG_TRAP(ifp->if_next==NULL);
469 BUG_TRAP(ifp->lst_next==NULL);
470 #ifdef NET_REFCNT_DEBUG
471 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
474 in6_dev_put(ifp->idev);
476 if (del_timer(&ifp->timer))
477 printk("Timer is still running, when freeing ifa=%p\n", ifp);
480 printk("Freeing alive inet6 address %p\n", ifp);
483 dst_release(&ifp->rt->u.dst);
488 /* On success it returns ifp with increased reference count */
490 static struct inet6_ifaddr *
491 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
492 int scope, unsigned flags)
494 struct inet6_ifaddr *ifa = NULL;
499 read_lock_bh(&addrconf_lock);
501 err = -ENODEV; /*XXX*/
505 write_lock(&addrconf_hash_lock);
507 /* Ignore adding duplicate addresses on an interface */
508 if (ipv6_chk_same_addr(addr, idev->dev)) {
509 ADBG(("ipv6_add_addr: already assigned\n"));
514 ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
517 ADBG(("ipv6_add_addr: malloc failed\n"));
522 rt = addrconf_dst_alloc(idev, addr, 0);
528 memset(ifa, 0, sizeof(struct inet6_ifaddr));
529 ipv6_addr_copy(&ifa->addr, addr);
531 spin_lock_init(&ifa->lock);
532 init_timer(&ifa->timer);
533 ifa->timer.data = (unsigned long) ifa;
535 ifa->prefix_len = pfxlen;
536 ifa->flags = flags | IFA_F_TENTATIVE;
537 ifa->cstamp = ifa->tstamp = jiffies;
544 /* Add to big hash table */
545 hash = ipv6_addr_hash(addr);
547 ifa->lst_next = inet6_addr_lst[hash];
548 inet6_addr_lst[hash] = ifa;
550 write_unlock(&addrconf_hash_lock);
552 write_lock(&idev->lock);
553 /* Add to inet6_dev unicast addr list. */
554 ifa->if_next = idev->addr_list;
555 idev->addr_list = ifa;
557 #ifdef CONFIG_IPV6_PRIVACY
558 if (ifa->flags&IFA_F_TEMPORARY) {
559 ifa->tmp_next = idev->tempaddr_list;
560 idev->tempaddr_list = ifa;
568 write_unlock(&idev->lock);
570 read_unlock_bh(&addrconf_lock);
572 if (unlikely(err == 0))
573 notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
581 write_unlock(&addrconf_hash_lock);
585 /* This function wants to get referenced ifp and releases it before return */
587 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
589 struct inet6_ifaddr *ifa, **ifap;
590 struct inet6_dev *idev = ifp->idev;
593 hash = ipv6_addr_hash(&ifp->addr);
597 write_lock_bh(&addrconf_hash_lock);
598 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
599 ifap = &ifa->lst_next) {
601 *ifap = ifa->lst_next;
603 ifa->lst_next = NULL;
607 write_unlock_bh(&addrconf_hash_lock);
609 write_lock_bh(&idev->lock);
610 #ifdef CONFIG_IPV6_PRIVACY
611 if (ifp->flags&IFA_F_TEMPORARY) {
612 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
613 ifap = &ifa->tmp_next) {
615 *ifap = ifa->tmp_next;
617 in6_ifa_put(ifp->ifpub);
621 ifa->tmp_next = NULL;
628 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
629 ifap = &ifa->if_next) {
631 *ifap = ifa->if_next;
637 write_unlock_bh(&idev->lock);
639 ipv6_ifa_notify(RTM_DELADDR, ifp);
641 notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
643 addrconf_del_timer(ifp);
648 #ifdef CONFIG_IPV6_PRIVACY
649 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
651 struct inet6_dev *idev = ifp->idev;
652 struct in6_addr addr, *tmpaddr;
653 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
658 write_lock(&idev->lock);
660 spin_lock_bh(&ift->lock);
661 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
662 spin_unlock_bh(&ift->lock);
669 if (idev->cnf.use_tempaddr <= 0) {
670 write_unlock(&idev->lock);
672 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
677 spin_lock_bh(&ifp->lock);
678 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
679 idev->cnf.use_tempaddr = -1; /*XXX*/
680 spin_unlock_bh(&ifp->lock);
681 write_unlock(&idev->lock);
683 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
689 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
690 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
691 spin_unlock_bh(&ifp->lock);
692 write_unlock(&idev->lock);
694 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
700 memcpy(&addr.s6_addr[8], idev->rndid, 8);
701 tmp_valid_lft = min_t(__u32,
703 idev->cnf.temp_valid_lft);
704 tmp_prefered_lft = min_t(__u32,
706 idev->cnf.temp_prefered_lft - desync_factor / HZ);
707 tmp_plen = ifp->prefix_len;
708 max_addresses = idev->cnf.max_addresses;
709 tmp_cstamp = ifp->cstamp;
710 tmp_tstamp = ifp->tstamp;
711 spin_unlock_bh(&ifp->lock);
713 write_unlock(&idev->lock);
714 ift = !max_addresses ||
715 ipv6_count_addresses(idev) < max_addresses ?
716 ipv6_add_addr(idev, &addr, tmp_plen,
717 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
718 if (!ift || IS_ERR(ift)) {
722 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
724 write_lock(&idev->lock);
728 spin_lock_bh(&ift->lock);
730 ift->valid_lft = tmp_valid_lft;
731 ift->prefered_lft = tmp_prefered_lft;
732 ift->cstamp = tmp_cstamp;
733 ift->tstamp = tmp_tstamp;
734 spin_unlock_bh(&ift->lock);
736 addrconf_dad_start(ift, 0);
745 * Choose an appropriate source address
747 * i) get an address with an appropriate scope
748 * ii) see if there is a specific route for the destination and use
749 * an address of the attached interface
750 * iii) don't use deprecated addresses
752 static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref)
755 pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2;
756 #ifdef CONFIG_IPV6_PRIVACY
757 pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1;
762 #ifdef CONFIG_IPV6_PRIVACY
763 #define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3)
765 #define IPV6_GET_SADDR_MAXSCORE(score) (score)
768 int ipv6_dev_get_saddr(struct net_device *dev,
769 struct in6_addr *daddr, struct in6_addr *saddr)
771 struct inet6_ifaddr *ifp = NULL;
772 struct inet6_ifaddr *match = NULL;
773 struct inet6_dev *idev;
776 int hiscore = -1, score;
778 scope = ipv6_addr_scope(daddr);
782 * search dev and walk through dev addresses
786 if (dev->flags & IFF_LOOPBACK)
789 read_lock(&addrconf_lock);
790 idev = __in6_dev_get(dev);
792 read_lock_bh(&idev->lock);
793 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
794 if (ifp->scope == scope) {
795 if (ifp->flags&IFA_F_TENTATIVE)
797 #ifdef CONFIG_IPV6_PRIVACY
798 score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
800 score = ipv6_saddr_pref(ifp, 0);
802 if (score <= hiscore)
811 if (IPV6_GET_SADDR_MAXSCORE(score)) {
812 read_unlock_bh(&idev->lock);
813 read_unlock(&addrconf_lock);
818 read_unlock_bh(&idev->lock);
820 read_unlock(&addrconf_lock);
823 if (scope == IFA_LINK)
827 * dev == NULL or search failed for specified dev
830 read_lock(&dev_base_lock);
831 read_lock(&addrconf_lock);
832 for (dev = dev_base; dev; dev=dev->next) {
833 idev = __in6_dev_get(dev);
835 read_lock_bh(&idev->lock);
836 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
837 if (ifp->scope == scope) {
838 if (ifp->flags&IFA_F_TENTATIVE)
840 #ifdef CONFIG_IPV6_PRIVACY
841 score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
843 score = ipv6_saddr_pref(ifp, 0);
845 if (score <= hiscore)
854 if (IPV6_GET_SADDR_MAXSCORE(score)) {
855 read_unlock_bh(&idev->lock);
856 goto out_unlock_base;
860 read_unlock_bh(&idev->lock);
865 read_unlock(&addrconf_lock);
866 read_unlock(&dev_base_lock);
869 err = -EADDRNOTAVAIL;
871 ipv6_addr_copy(saddr, &match->addr);
880 int ipv6_get_saddr(struct dst_entry *dst,
881 struct in6_addr *daddr, struct in6_addr *saddr)
883 return ipv6_dev_get_saddr(dst ? dst->dev : NULL, daddr, saddr);
887 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
889 struct inet6_dev *idev;
890 int err = -EADDRNOTAVAIL;
892 read_lock(&addrconf_lock);
893 if ((idev = __in6_dev_get(dev)) != NULL) {
894 struct inet6_ifaddr *ifp;
896 read_lock_bh(&idev->lock);
897 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
898 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
899 ipv6_addr_copy(addr, &ifp->addr);
904 read_unlock_bh(&idev->lock);
906 read_unlock(&addrconf_lock);
910 static int ipv6_count_addresses(struct inet6_dev *idev)
913 struct inet6_ifaddr *ifp;
915 read_lock_bh(&idev->lock);
916 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
918 read_unlock_bh(&idev->lock);
922 int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
924 struct inet6_ifaddr * ifp;
925 u8 hash = ipv6_addr_hash(addr);
927 read_lock_bh(&addrconf_hash_lock);
928 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
929 if (ipv6_addr_equal(&ifp->addr, addr) &&
930 !(ifp->flags&IFA_F_TENTATIVE)) {
931 if (dev == NULL || ifp->idev->dev == dev ||
932 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
936 read_unlock_bh(&addrconf_hash_lock);
941 int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
943 struct inet6_ifaddr * ifp;
944 u8 hash = ipv6_addr_hash(addr);
946 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
947 if (ipv6_addr_equal(&ifp->addr, addr)) {
948 if (dev == NULL || ifp->idev->dev == dev)
955 struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
957 struct inet6_ifaddr * ifp;
958 u8 hash = ipv6_addr_hash(addr);
960 read_lock_bh(&addrconf_hash_lock);
961 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
962 if (ipv6_addr_equal(&ifp->addr, addr)) {
963 if (dev == NULL || ifp->idev->dev == dev ||
964 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
970 read_unlock_bh(&addrconf_hash_lock);
975 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
977 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
978 const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
979 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
980 u32 sk2_rcv_saddr = tcp_v4_rcv_saddr(sk2);
981 int sk_ipv6only = ipv6_only_sock(sk);
982 int sk2_ipv6only = tcp_v6_ipv6only(sk2);
983 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
984 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
986 if (!sk2_rcv_saddr && !sk_ipv6only)
989 if (addr_type2 == IPV6_ADDR_ANY &&
990 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
993 if (addr_type == IPV6_ADDR_ANY &&
994 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
997 if (sk2_rcv_saddr6 &&
998 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1001 if (addr_type == IPV6_ADDR_MAPPED &&
1003 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1009 /* Gets referenced address, destroys ifaddr */
1011 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1013 if (net_ratelimit())
1014 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1015 if (ifp->flags&IFA_F_PERMANENT) {
1016 spin_lock_bh(&ifp->lock);
1017 addrconf_del_timer(ifp);
1018 ifp->flags |= IFA_F_TENTATIVE;
1019 spin_unlock_bh(&ifp->lock);
1021 #ifdef CONFIG_IPV6_PRIVACY
1022 } else if (ifp->flags&IFA_F_TEMPORARY) {
1023 struct inet6_ifaddr *ifpub;
1024 spin_lock_bh(&ifp->lock);
1027 in6_ifa_hold(ifpub);
1028 spin_unlock_bh(&ifp->lock);
1029 ipv6_create_tempaddr(ifpub, ifp);
1032 spin_unlock_bh(&ifp->lock);
1041 /* Join to solicited addr multicast group. */
1043 void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1045 struct in6_addr maddr;
1047 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1050 addrconf_addr_solict_mult(addr, &maddr);
1051 ipv6_dev_mc_inc(dev, &maddr);
1054 void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1056 struct in6_addr maddr;
1058 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1061 addrconf_addr_solict_mult(addr, &maddr);
1062 __ipv6_dev_mc_dec(idev, &maddr);
1065 void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1067 struct in6_addr addr;
1068 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1069 if (ipv6_addr_any(&addr))
1071 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1074 void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1076 struct in6_addr addr;
1077 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1078 if (ipv6_addr_any(&addr))
1080 __ipv6_dev_ac_dec(ifp->idev, &addr);
1083 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1085 switch (dev->type) {
1088 case ARPHRD_IEEE802_TR:
1089 if (dev->addr_len != ETH_ALEN)
1091 memcpy(eui, dev->dev_addr, 3);
1092 memcpy(eui + 5, dev->dev_addr + 3, 3);
1095 * The zSeries OSA network cards can be shared among various
1096 * OS instances, but the OSA cards have only one MAC address.
1097 * This leads to duplicate address conflicts in conjunction
1098 * with IPv6 if more than one instance uses the same card.
1100 * The driver for these cards can deliver a unique 16-bit
1101 * identifier for each instance sharing the same card. It is
1102 * placed instead of 0xFFFE in the interface identifier. The
1103 * "u" bit of the interface identifier is not inverted in this
1104 * case. Hence the resulting interface identifier has local
1105 * scope according to RFC2373.
1108 eui[3] = (dev->dev_id >> 8) & 0xFF;
1109 eui[4] = dev->dev_id & 0xFF;
1117 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1118 if (dev->addr_len != ARCNET_ALEN)
1121 eui[7] = *(u8*)dev->dev_addr;
1123 case ARPHRD_INFINIBAND:
1124 if (dev->addr_len != INFINIBAND_ALEN)
1126 memcpy(eui, dev->dev_addr + 12, 8);
1133 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1136 struct inet6_ifaddr *ifp;
1138 read_lock_bh(&idev->lock);
1139 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1140 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1141 memcpy(eui, ifp->addr.s6_addr+8, 8);
1146 read_unlock_bh(&idev->lock);
1150 #ifdef CONFIG_IPV6_PRIVACY
1151 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1152 static int __ipv6_regen_rndid(struct inet6_dev *idev)
1154 struct net_device *dev;
1155 struct scatterlist sg[2];
1157 sg[0].page = virt_to_page(idev->entropy);
1158 sg[0].offset = offset_in_page(idev->entropy);
1160 sg[1].page = virt_to_page(idev->work_eui64);
1161 sg[1].offset = offset_in_page(idev->work_eui64);
1166 if (ipv6_generate_eui64(idev->work_eui64, dev)) {
1168 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1170 get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
1173 spin_lock(&md5_tfm_lock);
1174 if (unlikely(md5_tfm == NULL)) {
1175 spin_unlock(&md5_tfm_lock);
1178 crypto_digest_init(md5_tfm);
1179 crypto_digest_update(md5_tfm, sg, 2);
1180 crypto_digest_final(md5_tfm, idev->work_digest);
1181 spin_unlock(&md5_tfm_lock);
1183 memcpy(idev->rndid, &idev->work_digest[0], 8);
1184 idev->rndid[0] &= ~0x02;
1185 memcpy(idev->entropy, &idev->work_digest[8], 8);
1188 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1189 * check if generated address is not inappropriate
1191 * - Reserved subnet anycast (RFC 2526)
1192 * 11111101 11....11 1xxxxxxx
1193 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1194 * 00-00-5E-FE-xx-xx-xx-xx
1196 * - XXX: already assigned to an address on the device
1198 if (idev->rndid[0] == 0xfd &&
1199 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1200 (idev->rndid[7]&0x80))
1202 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1203 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1205 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1212 static void ipv6_regen_rndid(unsigned long data)
1214 struct inet6_dev *idev = (struct inet6_dev *) data;
1215 unsigned long expires;
1217 read_lock_bh(&addrconf_lock);
1218 write_lock_bh(&idev->lock);
1223 if (__ipv6_regen_rndid(idev) < 0)
1227 idev->cnf.temp_prefered_lft * HZ -
1228 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1229 if (time_before(expires, jiffies)) {
1231 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1236 if (!mod_timer(&idev->regen_timer, expires))
1240 write_unlock_bh(&idev->lock);
1241 read_unlock_bh(&addrconf_lock);
1245 static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1248 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1249 ret = __ipv6_regen_rndid(idev);
1259 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1260 unsigned long expires, unsigned flags)
1262 struct in6_rtmsg rtmsg;
1264 memset(&rtmsg, 0, sizeof(rtmsg));
1265 ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
1266 rtmsg.rtmsg_dst_len = plen;
1267 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1268 rtmsg.rtmsg_ifindex = dev->ifindex;
1269 rtmsg.rtmsg_info = expires;
1270 rtmsg.rtmsg_flags = RTF_UP|flags;
1271 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1273 /* Prevent useless cloning on PtP SIT.
1274 This thing is done here expecting that the whole
1275 class of non-broadcast devices need not cloning.
1277 if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
1278 rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
1280 ip6_route_add(&rtmsg, NULL, NULL);
1283 /* Create "default" multicast route to the interface */
1285 static void addrconf_add_mroute(struct net_device *dev)
1287 struct in6_rtmsg rtmsg;
1289 memset(&rtmsg, 0, sizeof(rtmsg));
1290 ipv6_addr_set(&rtmsg.rtmsg_dst,
1291 htonl(0xFF000000), 0, 0, 0);
1292 rtmsg.rtmsg_dst_len = 8;
1293 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1294 rtmsg.rtmsg_ifindex = dev->ifindex;
1295 rtmsg.rtmsg_flags = RTF_UP;
1296 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1297 ip6_route_add(&rtmsg, NULL, NULL);
1300 static void sit_route_add(struct net_device *dev)
1302 struct in6_rtmsg rtmsg;
1304 memset(&rtmsg, 0, sizeof(rtmsg));
1306 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1307 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1309 /* prefix length - 96 bits "::d.d.d.d" */
1310 rtmsg.rtmsg_dst_len = 96;
1311 rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
1312 rtmsg.rtmsg_ifindex = dev->ifindex;
1314 ip6_route_add(&rtmsg, NULL, NULL);
1317 static void addrconf_add_lroute(struct net_device *dev)
1319 struct in6_addr addr;
1321 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1322 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1325 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1327 struct inet6_dev *idev;
1331 if ((idev = ipv6_find_idev(dev)) == NULL)
1334 /* Add default multicast route */
1335 addrconf_add_mroute(dev);
1337 /* Add link local route */
1338 addrconf_add_lroute(dev);
1342 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1344 struct prefix_info *pinfo;
1348 unsigned long rt_expires;
1349 struct inet6_dev *in6_dev;
1351 pinfo = (struct prefix_info *) opt;
1353 if (len < sizeof(struct prefix_info)) {
1354 ADBG(("addrconf: prefix option too short\n"));
1359 * Validation checks ([ADDRCONF], page 19)
1362 addr_type = ipv6_addr_type(&pinfo->prefix);
1364 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1367 valid_lft = ntohl(pinfo->valid);
1368 prefered_lft = ntohl(pinfo->prefered);
1370 if (prefered_lft > valid_lft) {
1371 if (net_ratelimit())
1372 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1376 in6_dev = in6_dev_get(dev);
1378 if (in6_dev == NULL) {
1379 if (net_ratelimit())
1380 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1385 * Two things going on here:
1386 * 1) Add routes for on-link prefixes
1387 * 2) Configure prefixes with the auto flag set
1390 /* Avoid arithmetic overflow. Really, we could
1391 save rt_expires in seconds, likely valid_lft,
1392 but it would require division in fib gc, that it
1395 if (valid_lft >= 0x7FFFFFFF/HZ)
1398 rt_expires = jiffies + valid_lft * HZ;
1400 if (pinfo->onlink) {
1401 struct rt6_info *rt;
1402 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1404 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1405 if (rt->rt6i_flags&RTF_EXPIRES) {
1406 if (valid_lft == 0) {
1407 ip6_del_rt(rt, NULL, NULL);
1410 rt->rt6i_expires = rt_expires;
1413 } else if (valid_lft) {
1414 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1415 dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1418 dst_release(&rt->u.dst);
1421 /* Try to figure out our local address for this prefix */
1423 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1424 struct inet6_ifaddr * ifp;
1425 struct in6_addr addr;
1426 int create = 0, update_lft = 0;
1428 if (pinfo->prefix_len == 64) {
1429 memcpy(&addr, &pinfo->prefix, 8);
1430 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1431 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1432 in6_dev_put(in6_dev);
1437 if (net_ratelimit())
1438 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1440 in6_dev_put(in6_dev);
1445 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1447 if (ifp == NULL && valid_lft) {
1448 int max_addresses = in6_dev->cnf.max_addresses;
1450 /* Do not allow to create too much of autoconfigured
1451 * addresses; this would be too easy way to crash kernel.
1453 if (!max_addresses ||
1454 ipv6_count_addresses(in6_dev) < max_addresses)
1455 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1456 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1458 if (!ifp || IS_ERR(ifp)) {
1459 in6_dev_put(in6_dev);
1463 update_lft = create = 1;
1464 ifp->cstamp = jiffies;
1465 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1471 #ifdef CONFIG_IPV6_PRIVACY
1472 struct inet6_ifaddr *ift;
1476 /* update lifetime (RFC2462 5.5.3 e) */
1477 spin_lock(&ifp->lock);
1479 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1480 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1483 if (!update_lft && stored_lft) {
1484 if (valid_lft > MIN_VALID_LIFETIME ||
1485 valid_lft > stored_lft)
1487 else if (stored_lft <= MIN_VALID_LIFETIME) {
1488 /* valid_lft <= stored_lft is always true */
1492 valid_lft = MIN_VALID_LIFETIME;
1493 if (valid_lft < prefered_lft)
1494 prefered_lft = valid_lft;
1500 ifp->valid_lft = valid_lft;
1501 ifp->prefered_lft = prefered_lft;
1504 ifp->flags &= ~IFA_F_DEPRECATED;
1505 spin_unlock(&ifp->lock);
1507 if (!(flags&IFA_F_TENTATIVE))
1508 ipv6_ifa_notify(0, ifp);
1510 spin_unlock(&ifp->lock);
1512 #ifdef CONFIG_IPV6_PRIVACY
1513 read_lock_bh(&in6_dev->lock);
1514 /* update all temporary addresses in the list */
1515 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1517 * When adjusting the lifetimes of an existing
1518 * temporary address, only lower the lifetimes.
1519 * Implementations must not increase the
1520 * lifetimes of an existing temporary address
1521 * when processing a Prefix Information Option.
1523 spin_lock(&ift->lock);
1525 if (ift->valid_lft > valid_lft &&
1526 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1527 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1528 if (ift->prefered_lft > prefered_lft &&
1529 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1530 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1531 spin_unlock(&ift->lock);
1532 if (!(flags&IFA_F_TENTATIVE))
1533 ipv6_ifa_notify(0, ift);
1536 if (create && in6_dev->cnf.use_tempaddr > 0) {
1538 * When a new public address is created as described in [ADDRCONF],
1539 * also create a new temporary address.
1541 read_unlock_bh(&in6_dev->lock);
1542 ipv6_create_tempaddr(ifp, NULL);
1544 read_unlock_bh(&in6_dev->lock);
1551 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1552 in6_dev_put(in6_dev);
1556 * Set destination address.
1557 * Special case for SIT interfaces where we create a new "virtual"
1560 int addrconf_set_dstaddr(void __user *arg)
1562 struct in6_ifreq ireq;
1563 struct net_device *dev;
1569 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1572 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1578 if (dev->type == ARPHRD_SIT) {
1581 struct ip_tunnel_parm p;
1583 err = -EADDRNOTAVAIL;
1584 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1587 memset(&p, 0, sizeof(p));
1588 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1592 p.iph.protocol = IPPROTO_IPV6;
1594 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1596 oldfs = get_fs(); set_fs(KERNEL_DS);
1597 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1602 if ((dev = __dev_get_by_name(p.name)) == NULL)
1604 err = dev_open(dev);
1614 * Manual configuration of address on an interface
1616 static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
1618 struct inet6_ifaddr *ifp;
1619 struct inet6_dev *idev;
1620 struct net_device *dev;
1625 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1628 if (!(dev->flags&IFF_UP))
1631 if ((idev = addrconf_add_dev(dev)) == NULL)
1634 scope = ipv6_addr_scope(pfx);
1636 ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
1638 addrconf_dad_start(ifp, 0);
1643 return PTR_ERR(ifp);
1646 static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1648 struct inet6_ifaddr *ifp;
1649 struct inet6_dev *idev;
1650 struct net_device *dev;
1652 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1655 if ((idev = __in6_dev_get(dev)) == NULL)
1658 read_lock_bh(&idev->lock);
1659 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1660 if (ifp->prefix_len == plen &&
1661 ipv6_addr_equal(pfx, &ifp->addr)) {
1663 read_unlock_bh(&idev->lock);
1667 /* If the last address is deleted administratively,
1668 disable IPv6 on this interface.
1670 if (idev->addr_list == NULL)
1671 addrconf_ifdown(idev->dev, 1);
1675 read_unlock_bh(&idev->lock);
1676 return -EADDRNOTAVAIL;
1680 int addrconf_add_ifaddr(void __user *arg)
1682 struct in6_ifreq ireq;
1685 if (!capable(CAP_NET_ADMIN))
1688 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1692 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1697 int addrconf_del_ifaddr(void __user *arg)
1699 struct in6_ifreq ireq;
1702 if (!capable(CAP_NET_ADMIN))
1705 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1709 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1714 static void sit_add_v4_addrs(struct inet6_dev *idev)
1716 struct inet6_ifaddr * ifp;
1717 struct in6_addr addr;
1718 struct net_device *dev;
1723 memset(&addr, 0, sizeof(struct in6_addr));
1724 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1726 if (idev->dev->flags&IFF_POINTOPOINT) {
1727 addr.s6_addr32[0] = htonl(0xfe800000);
1730 scope = IPV6_ADDR_COMPATv4;
1733 if (addr.s6_addr32[3]) {
1734 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1736 spin_lock_bh(&ifp->lock);
1737 ifp->flags &= ~IFA_F_TENTATIVE;
1738 spin_unlock_bh(&ifp->lock);
1739 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1745 for (dev = dev_base; dev != NULL; dev = dev->next) {
1746 struct in_device * in_dev = __in_dev_get(dev);
1747 if (in_dev && (dev->flags & IFF_UP)) {
1748 struct in_ifaddr * ifa;
1752 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
1755 addr.s6_addr32[3] = ifa->ifa_local;
1757 if (ifa->ifa_scope == RT_SCOPE_LINK)
1759 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
1760 if (idev->dev->flags&IFF_POINTOPOINT)
1764 if (idev->dev->flags&IFF_POINTOPOINT)
1769 ifp = ipv6_add_addr(idev, &addr, plen, flag,
1772 spin_lock_bh(&ifp->lock);
1773 ifp->flags &= ~IFA_F_TENTATIVE;
1774 spin_unlock_bh(&ifp->lock);
1775 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1783 static void init_loopback(struct net_device *dev)
1785 struct inet6_dev *idev;
1786 struct inet6_ifaddr * ifp;
1792 if ((idev = ipv6_find_idev(dev)) == NULL) {
1793 printk(KERN_DEBUG "init loopback: add_dev failed\n");
1797 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
1799 spin_lock_bh(&ifp->lock);
1800 ifp->flags &= ~IFA_F_TENTATIVE;
1801 spin_unlock_bh(&ifp->lock);
1802 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1807 static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
1809 struct inet6_ifaddr * ifp;
1811 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
1813 addrconf_dad_start(ifp, 0);
1818 static void addrconf_dev_config(struct net_device *dev)
1820 struct in6_addr addr;
1821 struct inet6_dev * idev;
1825 if ((dev->type != ARPHRD_ETHER) &&
1826 (dev->type != ARPHRD_FDDI) &&
1827 (dev->type != ARPHRD_IEEE802_TR) &&
1828 (dev->type != ARPHRD_ARCNET) &&
1829 (dev->type != ARPHRD_INFINIBAND)) {
1830 /* Alas, we support only Ethernet autoconfiguration. */
1834 idev = addrconf_add_dev(dev);
1838 memset(&addr, 0, sizeof(struct in6_addr));
1839 addr.s6_addr32[0] = htonl(0xFE800000);
1841 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
1842 addrconf_add_linklocal(idev, &addr);
1845 static void addrconf_sit_config(struct net_device *dev)
1847 struct inet6_dev *idev;
1852 * Configure the tunnel with one of our IPv4
1853 * addresses... we should configure all of
1854 * our v4 addrs in the tunnel
1857 if ((idev = ipv6_find_idev(dev)) == NULL) {
1858 printk(KERN_DEBUG "init sit: add_dev failed\n");
1862 sit_add_v4_addrs(idev);
1864 if (dev->flags&IFF_POINTOPOINT) {
1865 addrconf_add_mroute(dev);
1866 addrconf_add_lroute(dev);
1872 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
1874 struct in6_addr lladdr;
1876 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
1877 addrconf_add_linklocal(idev, &lladdr);
1883 static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
1885 struct net_device *link_dev;
1887 /* first try to inherit the link-local address from the link device */
1888 if (idev->dev->iflink &&
1889 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
1890 if (!ipv6_inherit_linklocal(idev, link_dev))
1893 /* then try to inherit it from any device */
1894 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
1895 if (!ipv6_inherit_linklocal(idev, link_dev))
1898 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
1902 * Autoconfigure tunnel with a link-local address so routing protocols,
1903 * DHCPv6, MLD etc. can be run over the virtual link
1906 static void addrconf_ip6_tnl_config(struct net_device *dev)
1908 struct inet6_dev *idev;
1912 if ((idev = addrconf_add_dev(dev)) == NULL) {
1913 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
1916 ip6_tnl_add_linklocal(idev);
1917 addrconf_add_mroute(dev);
1920 static int addrconf_notify(struct notifier_block *this, unsigned long event,
1923 struct net_device *dev = (struct net_device *) data;
1924 struct inet6_dev *idev = __in6_dev_get(dev);
1930 addrconf_sit_config(dev);
1932 case ARPHRD_TUNNEL6:
1933 addrconf_ip6_tnl_config(dev);
1935 case ARPHRD_LOOPBACK:
1940 addrconf_dev_config(dev);
1944 /* If the MTU changed during the interface down, when the
1945 interface up, the changed MTU must be reflected in the
1946 idev as well as routers.
1948 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
1949 rt6_mtu_change(dev, dev->mtu);
1950 idev->cnf.mtu6 = dev->mtu;
1952 idev->tstamp = jiffies;
1953 inet6_ifinfo_notify(RTM_NEWLINK, idev);
1954 /* If the changed mtu during down is lower than IPV6_MIN_MTU
1955 stop IPv6 on this interface.
1957 if (dev->mtu < IPV6_MIN_MTU)
1958 addrconf_ifdown(dev, event != NETDEV_DOWN);
1962 case NETDEV_CHANGEMTU:
1963 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
1964 rt6_mtu_change(dev, dev->mtu);
1965 idev->cnf.mtu6 = dev->mtu;
1969 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
1972 case NETDEV_UNREGISTER:
1974 * Remove all addresses from this interface.
1976 addrconf_ifdown(dev, event != NETDEV_DOWN);
1980 case NETDEV_CHANGENAME:
1981 #ifdef CONFIG_SYSCTL
1983 addrconf_sysctl_unregister(&idev->cnf);
1984 neigh_sysctl_unregister(idev->nd_parms);
1985 neigh_sysctl_register(dev, idev->nd_parms, NET_IPV6, NET_IPV6_NEIGH, "ipv6", &ndisc_ifinfo_sysctl_change);
1986 addrconf_sysctl_register(idev, &idev->cnf);
1996 * addrconf module should be notified of a device going up
1998 static struct notifier_block ipv6_dev_notf = {
1999 .notifier_call = addrconf_notify,
2003 static int addrconf_ifdown(struct net_device *dev, int how)
2005 struct inet6_dev *idev;
2006 struct inet6_ifaddr *ifa, **bifa;
2012 neigh_ifdown(&nd_tbl, dev);
2014 idev = __in6_dev_get(dev);
2018 /* Step 1: remove reference to ipv6 device from parent device.
2022 write_lock_bh(&addrconf_lock);
2023 dev->ip6_ptr = NULL;
2025 write_unlock_bh(&addrconf_lock);
2027 /* Step 1.5: remove snmp6 entry */
2028 snmp6_unregister_dev(idev);
2032 /* Step 2: clear hash table */
2033 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2034 bifa = &inet6_addr_lst[i];
2036 write_lock_bh(&addrconf_hash_lock);
2037 while ((ifa = *bifa) != NULL) {
2038 if (ifa->idev == idev) {
2039 *bifa = ifa->lst_next;
2040 ifa->lst_next = NULL;
2041 addrconf_del_timer(ifa);
2045 bifa = &ifa->lst_next;
2047 write_unlock_bh(&addrconf_hash_lock);
2050 write_lock_bh(&idev->lock);
2052 /* Step 3: clear flags for stateless addrconf */
2054 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
2056 /* Step 4: clear address list */
2057 #ifdef CONFIG_IPV6_PRIVACY
2058 if (how == 1 && del_timer(&idev->regen_timer))
2061 /* clear tempaddr list */
2062 while ((ifa = idev->tempaddr_list) != NULL) {
2063 idev->tempaddr_list = ifa->tmp_next;
2064 ifa->tmp_next = NULL;
2066 write_unlock_bh(&idev->lock);
2067 spin_lock_bh(&ifa->lock);
2070 in6_ifa_put(ifa->ifpub);
2073 spin_unlock_bh(&ifa->lock);
2075 write_lock_bh(&idev->lock);
2078 while ((ifa = idev->addr_list) != NULL) {
2079 idev->addr_list = ifa->if_next;
2080 ifa->if_next = NULL;
2082 addrconf_del_timer(ifa);
2083 write_unlock_bh(&idev->lock);
2085 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2088 write_lock_bh(&idev->lock);
2090 write_unlock_bh(&idev->lock);
2092 /* Step 5: Discard multicast list */
2095 ipv6_mc_destroy_dev(idev);
2099 /* Step 5: netlink notification of this interface */
2100 idev->tstamp = jiffies;
2101 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2103 /* Shot the device (if unregistered) */
2106 #ifdef CONFIG_SYSCTL
2107 addrconf_sysctl_unregister(&idev->cnf);
2108 neigh_sysctl_unregister(idev->nd_parms);
2110 neigh_parms_release(&nd_tbl, idev->nd_parms);
2111 neigh_ifdown(&nd_tbl, dev);
2117 static void addrconf_rs_timer(unsigned long data)
2119 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2121 if (ifp->idev->cnf.forwarding)
2124 if (ifp->idev->if_flags & IF_RA_RCVD) {
2126 * Announcement received after solicitation
2132 spin_lock(&ifp->lock);
2133 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2134 struct in6_addr all_routers;
2136 /* The wait after the last probe can be shorter */
2137 addrconf_mod_timer(ifp, AC_RS,
2138 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2139 ifp->idev->cnf.rtr_solicit_delay :
2140 ifp->idev->cnf.rtr_solicit_interval);
2141 spin_unlock(&ifp->lock);
2143 ipv6_addr_all_routers(&all_routers);
2145 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2147 spin_unlock(&ifp->lock);
2149 * Note: we do not support deprecated "all on-link"
2150 * assumption any longer.
2152 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2153 ifp->idev->dev->name);
2161 * Duplicate Address Detection
2163 static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
2165 struct inet6_dev *idev = ifp->idev;
2166 struct net_device *dev = idev->dev;
2167 unsigned long rand_num;
2169 addrconf_join_solict(dev, &ifp->addr);
2171 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2172 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2175 net_srandom(ifp->addr.s6_addr32[3]);
2176 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2178 read_lock_bh(&idev->lock);
2181 spin_lock_bh(&ifp->lock);
2183 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2184 !(ifp->flags&IFA_F_TENTATIVE)) {
2185 ifp->flags &= ~IFA_F_TENTATIVE;
2186 spin_unlock_bh(&ifp->lock);
2187 read_unlock_bh(&idev->lock);
2189 addrconf_dad_completed(ifp);
2193 ifp->probes = idev->cnf.dad_transmits;
2194 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2196 spin_unlock_bh(&ifp->lock);
2198 read_unlock_bh(&idev->lock);
2201 static void addrconf_dad_timer(unsigned long data)
2203 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2204 struct inet6_dev *idev = ifp->idev;
2205 struct in6_addr unspec;
2206 struct in6_addr mcaddr;
2208 read_lock_bh(&idev->lock);
2210 read_unlock_bh(&idev->lock);
2213 spin_lock_bh(&ifp->lock);
2214 if (ifp->probes == 0) {
2216 * DAD was successful
2219 ifp->flags &= ~IFA_F_TENTATIVE;
2220 spin_unlock_bh(&ifp->lock);
2221 read_unlock_bh(&idev->lock);
2223 addrconf_dad_completed(ifp);
2229 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2230 spin_unlock_bh(&ifp->lock);
2231 read_unlock_bh(&idev->lock);
2233 /* send a neighbour solicitation for our addr */
2234 memset(&unspec, 0, sizeof(unspec));
2235 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2236 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2241 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2243 struct net_device * dev = ifp->idev->dev;
2246 * Configure the address for reception. Now it is valid.
2249 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2251 /* If added prefix is link local and forwarding is off,
2252 start sending router solicitations.
2255 if (ifp->idev->cnf.forwarding == 0 &&
2256 ifp->idev->cnf.rtr_solicits > 0 &&
2257 (dev->flags&IFF_LOOPBACK) == 0 &&
2258 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2259 struct in6_addr all_routers;
2261 ipv6_addr_all_routers(&all_routers);
2264 * If a host as already performed a random delay
2265 * [...] as part of DAD [...] there is no need
2266 * to delay again before sending the first RS
2268 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2270 spin_lock_bh(&ifp->lock);
2272 ifp->idev->if_flags |= IF_RS_SENT;
2273 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2274 spin_unlock_bh(&ifp->lock);
2278 #ifdef CONFIG_PROC_FS
2279 struct if6_iter_state {
2283 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2285 struct inet6_ifaddr *ifa = NULL;
2286 struct if6_iter_state *state = seq->private;
2288 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2289 ifa = inet6_addr_lst[state->bucket];
2296 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2298 struct if6_iter_state *state = seq->private;
2300 ifa = ifa->lst_next;
2302 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2303 ifa = inet6_addr_lst[state->bucket];
2309 static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2311 struct inet6_ifaddr *ifa = if6_get_first(seq);
2314 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2316 return pos ? NULL : ifa;
2319 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2321 read_lock_bh(&addrconf_hash_lock);
2322 return if6_get_idx(seq, *pos);
2325 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2327 struct inet6_ifaddr *ifa;
2329 ifa = if6_get_next(seq, v);
2334 static void if6_seq_stop(struct seq_file *seq, void *v)
2336 read_unlock_bh(&addrconf_hash_lock);
2339 static int if6_seq_show(struct seq_file *seq, void *v)
2341 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2343 /* no ipv6 inside a vserver for now */
2344 if (vx_check(0, VX_ADMIN|VX_WATCH))
2346 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2348 ifp->idev->dev->ifindex,
2352 ifp->idev->dev->name);
2356 static struct seq_operations if6_seq_ops = {
2357 .start = if6_seq_start,
2358 .next = if6_seq_next,
2359 .show = if6_seq_show,
2360 .stop = if6_seq_stop,
2363 static int if6_seq_open(struct inode *inode, struct file *file)
2365 struct seq_file *seq;
2367 struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2371 memset(s, 0, sizeof(*s));
2373 rc = seq_open(file, &if6_seq_ops);
2377 seq = file->private_data;
2386 static struct file_operations if6_fops = {
2387 .owner = THIS_MODULE,
2388 .open = if6_seq_open,
2390 .llseek = seq_lseek,
2391 .release = seq_release_private,
2394 int __init if6_proc_init(void)
2396 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2401 void if6_proc_exit(void)
2403 proc_net_remove("if_inet6");
2405 #endif /* CONFIG_PROC_FS */
2408 * Periodic address status verification
2411 static void addrconf_verify(unsigned long foo)
2413 struct inet6_ifaddr *ifp;
2414 unsigned long now, next;
2417 spin_lock_bh(&addrconf_verify_lock);
2419 next = now + ADDR_CHECK_FREQUENCY;
2421 del_timer(&addr_chk_timer);
2423 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2426 write_lock(&addrconf_hash_lock);
2427 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2429 #ifdef CONFIG_IPV6_PRIVACY
2430 unsigned long regen_advance;
2433 if (ifp->flags & IFA_F_PERMANENT)
2436 spin_lock(&ifp->lock);
2437 age = (now - ifp->tstamp) / HZ;
2439 #ifdef CONFIG_IPV6_PRIVACY
2440 regen_advance = ifp->idev->cnf.regen_max_retry *
2441 ifp->idev->cnf.dad_transmits *
2442 ifp->idev->nd_parms->retrans_time / HZ;
2445 if (age >= ifp->valid_lft) {
2446 spin_unlock(&ifp->lock);
2448 write_unlock(&addrconf_hash_lock);
2451 } else if (age >= ifp->prefered_lft) {
2452 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2455 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2457 ifp->flags |= IFA_F_DEPRECATED;
2460 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2461 next = ifp->tstamp + ifp->valid_lft * HZ;
2463 spin_unlock(&ifp->lock);
2467 write_unlock(&addrconf_hash_lock);
2469 ipv6_ifa_notify(0, ifp);
2473 #ifdef CONFIG_IPV6_PRIVACY
2474 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2475 !(ifp->flags&IFA_F_TENTATIVE)) {
2476 if (age >= ifp->prefered_lft - regen_advance) {
2477 struct inet6_ifaddr *ifpub = ifp->ifpub;
2478 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2479 next = ifp->tstamp + ifp->prefered_lft * HZ;
2480 if (!ifp->regen_count && ifpub) {
2483 in6_ifa_hold(ifpub);
2484 spin_unlock(&ifp->lock);
2485 write_unlock(&addrconf_hash_lock);
2486 ipv6_create_tempaddr(ifpub, ifp);
2491 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2492 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2493 spin_unlock(&ifp->lock);
2496 /* ifp->prefered_lft <= ifp->valid_lft */
2497 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2498 next = ifp->tstamp + ifp->prefered_lft * HZ;
2499 spin_unlock(&ifp->lock);
2502 write_unlock(&addrconf_hash_lock);
2505 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2506 add_timer(&addr_chk_timer);
2507 spin_unlock_bh(&addrconf_verify_lock);
2511 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2513 struct rtattr **rta = arg;
2514 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2515 struct in6_addr *pfx;
2518 if (rta[IFA_ADDRESS-1]) {
2519 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2521 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2523 if (rta[IFA_LOCAL-1]) {
2524 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2526 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2531 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2535 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2537 struct rtattr **rta = arg;
2538 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2539 struct in6_addr *pfx;
2542 if (rta[IFA_ADDRESS-1]) {
2543 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2545 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2547 if (rta[IFA_LOCAL-1]) {
2548 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2550 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2555 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2558 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
2559 u32 pid, u32 seq, int event)
2561 struct ifaddrmsg *ifm;
2562 struct nlmsghdr *nlh;
2563 struct ifa_cacheinfo ci;
2564 unsigned char *b = skb->tail;
2566 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
2567 if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
2568 ifm = NLMSG_DATA(nlh);
2569 ifm->ifa_family = AF_INET6;
2570 ifm->ifa_prefixlen = ifa->prefix_len;
2571 ifm->ifa_flags = ifa->flags;
2572 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2573 if (ifa->scope&IFA_HOST)
2574 ifm->ifa_scope = RT_SCOPE_HOST;
2575 else if (ifa->scope&IFA_LINK)
2576 ifm->ifa_scope = RT_SCOPE_LINK;
2577 else if (ifa->scope&IFA_SITE)
2578 ifm->ifa_scope = RT_SCOPE_SITE;
2579 ifm->ifa_index = ifa->idev->dev->ifindex;
2580 RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
2581 if (!(ifa->flags&IFA_F_PERMANENT)) {
2582 ci.ifa_prefered = ifa->prefered_lft;
2583 ci.ifa_valid = ifa->valid_lft;
2584 if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
2585 long tval = (jiffies - ifa->tstamp)/HZ;
2586 ci.ifa_prefered -= tval;
2587 if (ci.ifa_valid != INFINITY_LIFE_TIME)
2588 ci.ifa_valid -= tval;
2591 ci.ifa_prefered = INFINITY_LIFE_TIME;
2592 ci.ifa_valid = INFINITY_LIFE_TIME;
2594 ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
2595 + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2596 ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
2597 + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2598 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2599 nlh->nlmsg_len = skb->tail - b;
2604 skb_trim(skb, b - skb->data);
2608 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
2609 u32 pid, u32 seq, int event)
2611 struct ifaddrmsg *ifm;
2612 struct nlmsghdr *nlh;
2613 struct ifa_cacheinfo ci;
2614 unsigned char *b = skb->tail;
2616 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
2617 if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
2618 ifm = NLMSG_DATA(nlh);
2619 ifm->ifa_family = AF_INET6;
2620 ifm->ifa_prefixlen = 128;
2621 ifm->ifa_flags = IFA_F_PERMANENT;
2622 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2623 if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
2624 ifm->ifa_scope = RT_SCOPE_SITE;
2625 ifm->ifa_index = ifmca->idev->dev->ifindex;
2626 RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
2627 ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
2628 * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
2630 ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
2631 * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
2633 ci.ifa_prefered = INFINITY_LIFE_TIME;
2634 ci.ifa_valid = INFINITY_LIFE_TIME;
2635 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2636 nlh->nlmsg_len = skb->tail - b;
2641 skb_trim(skb, b - skb->data);
2645 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
2646 u32 pid, u32 seq, int event)
2648 struct ifaddrmsg *ifm;
2649 struct nlmsghdr *nlh;
2650 struct ifa_cacheinfo ci;
2651 unsigned char *b = skb->tail;
2653 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
2654 if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
2655 ifm = NLMSG_DATA(nlh);
2656 ifm->ifa_family = AF_INET6;
2657 ifm->ifa_prefixlen = 128;
2658 ifm->ifa_flags = IFA_F_PERMANENT;
2659 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2660 if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
2661 ifm->ifa_scope = RT_SCOPE_SITE;
2662 ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
2663 RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
2664 ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
2665 * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
2667 ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
2668 * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
2670 ci.ifa_prefered = INFINITY_LIFE_TIME;
2671 ci.ifa_valid = INFINITY_LIFE_TIME;
2672 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2673 nlh->nlmsg_len = skb->tail - b;
2678 skb_trim(skb, b - skb->data);
2689 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
2690 enum addr_type_t type)
2693 int s_idx, s_ip_idx;
2695 struct net_device *dev;
2696 struct inet6_dev *idev = NULL;
2697 struct inet6_ifaddr *ifa;
2698 struct ifmcaddr6 *ifmca;
2699 struct ifacaddr6 *ifaca;
2701 /* no ipv6 inside a vserver for now */
2702 if (skb->sk && skb->sk->sk_vx_info)
2705 s_idx = cb->args[0];
2706 s_ip_idx = ip_idx = cb->args[1];
2707 read_lock(&dev_base_lock);
2709 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
2715 if ((idev = in6_dev_get(dev)) == NULL)
2717 read_lock_bh(&idev->lock);
2720 /* unicast address */
2721 for (ifa = idev->addr_list; ifa;
2722 ifa = ifa->if_next, ip_idx++) {
2723 if (ip_idx < s_ip_idx)
2725 if ((err = inet6_fill_ifaddr(skb, ifa,
2726 NETLINK_CB(cb->skb).pid,
2727 cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0)
2731 #ifdef CONFIG_IPV6_PRIVACY
2732 for (ifa = idev->tempaddr_list; ifa;
2733 ifa = ifa->tmp_next, ip_idx++) {
2734 if (ip_idx < s_ip_idx)
2736 if ((err = inet6_fill_ifaddr(skb, ifa,
2737 NETLINK_CB(cb->skb).pid,
2738 cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0)
2743 case MULTICAST_ADDR:
2744 /* multicast address */
2745 for (ifmca = idev->mc_list; ifmca;
2746 ifmca = ifmca->next, ip_idx++) {
2747 if (ip_idx < s_ip_idx)
2749 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
2750 NETLINK_CB(cb->skb).pid,
2751 cb->nlh->nlmsg_seq, RTM_GETMULTICAST)) <= 0)
2756 /* anycast address */
2757 for (ifaca = idev->ac_list; ifaca;
2758 ifaca = ifaca->aca_next, ip_idx++) {
2759 if (ip_idx < s_ip_idx)
2761 if ((err = inet6_fill_ifacaddr(skb, ifaca,
2762 NETLINK_CB(cb->skb).pid,
2763 cb->nlh->nlmsg_seq, RTM_GETANYCAST)) <= 0)
2770 read_unlock_bh(&idev->lock);
2775 read_unlock_bh(&idev->lock);
2778 read_unlock(&dev_base_lock);
2780 cb->args[1] = ip_idx;
2784 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
2786 enum addr_type_t type = UNICAST_ADDR;
2787 return inet6_dump_addr(skb, cb, type);
2790 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
2792 enum addr_type_t type = MULTICAST_ADDR;
2793 return inet6_dump_addr(skb, cb, type);
2797 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
2799 enum addr_type_t type = ANYCAST_ADDR;
2800 return inet6_dump_addr(skb, cb, type);
2803 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
2805 struct sk_buff *skb;
2806 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
2808 skb = alloc_skb(size, GFP_ATOMIC);
2810 netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS);
2813 if (inet6_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
2815 netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL);
2818 NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR;
2819 netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC);
2822 static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
2823 __s32 *array, int bytes)
2825 memset(array, 0, bytes);
2826 array[DEVCONF_FORWARDING] = cnf->forwarding;
2827 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
2828 array[DEVCONF_MTU6] = cnf->mtu6;
2829 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
2830 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
2831 array[DEVCONF_AUTOCONF] = cnf->autoconf;
2832 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
2833 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
2834 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
2835 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
2836 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
2837 #ifdef CONFIG_IPV6_PRIVACY
2838 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
2839 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
2840 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
2841 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
2842 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
2844 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
2847 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
2848 u32 pid, u32 seq, int event)
2850 struct net_device *dev = idev->dev;
2851 __s32 *array = NULL;
2852 struct ifinfomsg *r;
2853 struct nlmsghdr *nlh;
2854 unsigned char *b = skb->tail;
2855 struct rtattr *subattr;
2856 __u32 mtu = dev->mtu;
2857 struct ifla_cacheinfo ci;
2859 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*r));
2860 if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
2861 r = NLMSG_DATA(nlh);
2862 r->ifi_family = AF_INET6;
2863 r->ifi_type = dev->type;
2864 r->ifi_index = dev->ifindex;
2865 r->ifi_flags = dev->flags;
2867 if (!netif_running(dev) || !netif_carrier_ok(dev))
2868 r->ifi_flags &= ~IFF_RUNNING;
2870 r->ifi_flags |= IFF_RUNNING;
2872 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
2875 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
2877 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
2878 if (dev->ifindex != dev->iflink)
2879 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
2881 subattr = (struct rtattr*)skb->tail;
2883 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
2885 /* return the device flags */
2886 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
2888 /* return interface cacheinfo */
2889 ci.max_reasm_len = IPV6_MAXPLEN;
2890 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
2891 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2892 ci.reachable_time = idev->nd_parms->reachable_time;
2893 ci.retrans_time = idev->nd_parms->retrans_time;
2894 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
2896 /* return the device sysctl params */
2897 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
2898 goto rtattr_failure;
2899 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
2900 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
2902 /* XXX - Statistics/MC not implemented */
2903 subattr->rta_len = skb->tail - (u8*)subattr;
2905 nlh->nlmsg_len = skb->tail - b;
2913 skb_trim(skb, b - skb->data);
2917 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2920 int s_idx = cb->args[0];
2921 struct net_device *dev;
2922 struct inet6_dev *idev;
2924 /* no ipv6 inside a vserver for now */
2925 if (skb->sk && skb->sk->sk_vx_info)
2928 read_lock(&dev_base_lock);
2929 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
2932 if ((idev = in6_dev_get(dev)) == NULL)
2934 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
2935 cb->nlh->nlmsg_seq, RTM_NEWLINK);
2940 read_unlock(&dev_base_lock);
2946 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
2948 struct sk_buff *skb;
2950 int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
2952 skb = alloc_skb(size, GFP_ATOMIC);
2954 netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, ENOBUFS);
2957 if (inet6_fill_ifinfo(skb, idev, 0, 0, event) < 0) {
2959 netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, EINVAL);
2962 NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFINFO;
2963 netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFINFO, GFP_ATOMIC);
2966 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
2967 struct prefix_info *pinfo, u32 pid, u32 seq, int event)
2969 struct prefixmsg *pmsg;
2970 struct nlmsghdr *nlh;
2971 unsigned char *b = skb->tail;
2972 struct prefix_cacheinfo ci;
2974 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*pmsg));
2977 nlh->nlmsg_flags |= NLM_F_MULTI;
2979 pmsg = NLMSG_DATA(nlh);
2980 pmsg->prefix_family = AF_INET6;
2981 pmsg->prefix_ifindex = idev->dev->ifindex;
2982 pmsg->prefix_len = pinfo->prefix_len;
2983 pmsg->prefix_type = pinfo->type;
2985 pmsg->prefix_flags = 0;
2987 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
2988 if (pinfo->autoconf)
2989 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
2991 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
2993 ci.preferred_time = ntohl(pinfo->prefered);
2994 ci.valid_time = ntohl(pinfo->valid);
2995 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
2997 nlh->nlmsg_len = skb->tail - b;
3002 skb_trim(skb, b - skb->data);
3006 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3007 struct prefix_info *pinfo)
3009 struct sk_buff *skb;
3010 int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
3012 skb = alloc_skb(size, GFP_ATOMIC);
3014 netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, ENOBUFS);
3017 if (inet6_fill_prefix(skb, idev, pinfo, 0, 0, event) < 0) {
3019 netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, EINVAL);
3022 NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_PREFIX;
3023 netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_PREFIX, GFP_ATOMIC);
3026 static struct rtnetlink_link inet6_rtnetlink_table[RTM_MAX - RTM_BASE + 1] = {
3027 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3028 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3029 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3030 [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
3031 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3032 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3033 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3034 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3035 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3036 .dumpit = inet6_dump_fib, },
3039 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3041 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3045 dst_hold(&ifp->rt->u.dst);
3046 if (ip6_ins_rt(ifp->rt, NULL, NULL))
3047 dst_release(&ifp->rt->u.dst);
3048 if (ifp->idev->cnf.forwarding)
3049 addrconf_join_anycast(ifp);
3052 if (ifp->idev->cnf.forwarding)
3053 addrconf_leave_anycast(ifp);
3054 addrconf_leave_solict(ifp->idev, &ifp->addr);
3055 dst_hold(&ifp->rt->u.dst);
3056 if (ip6_del_rt(ifp->rt, NULL, NULL))
3057 dst_free(&ifp->rt->u.dst);
3059 dst_release(&ifp->rt->u.dst);
3064 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3066 read_lock_bh(&addrconf_lock);
3067 if (likely(ifp->idev->dead == 0))
3068 __ipv6_ifa_notify(event, ifp);
3069 read_unlock_bh(&addrconf_lock);
3072 #ifdef CONFIG_SYSCTL
3075 int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3076 void __user *buffer, size_t *lenp, loff_t *ppos)
3078 int *valp = ctl->data;
3082 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3084 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3085 if (valp != &ipv6_devconf.forwarding) {
3086 if ((!*valp) ^ (!val)) {
3087 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3090 dev_forward_change(idev);
3093 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3094 addrconf_forward_change();
3097 rt6_purge_dflt_routers();
3103 static int addrconf_sysctl_forward_strategy(ctl_table *table,
3104 int __user *name, int nlen,
3105 void __user *oldval,
3106 size_t __user *oldlenp,
3107 void __user *newval, size_t newlen,
3110 int *valp = table->data;
3113 if (!newval || !newlen)
3115 if (newlen != sizeof(int))
3117 if (get_user(new, (int __user *)newval))
3121 if (oldval && oldlenp) {
3123 if (get_user(len, oldlenp))
3126 if (len > table->maxlen)
3127 len = table->maxlen;
3128 if (copy_to_user(oldval, valp, len))
3130 if (put_user(len, oldlenp))
3135 if (valp != &ipv6_devconf_dflt.forwarding) {
3136 if (valp != &ipv6_devconf.forwarding) {
3137 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3139 if (unlikely(idev == NULL))
3141 changed = (!*valp) ^ (!new);
3144 dev_forward_change(idev);
3147 addrconf_forward_change();
3151 rt6_purge_dflt_routers();
3158 static struct addrconf_sysctl_table
3160 struct ctl_table_header *sysctl_header;
3161 ctl_table addrconf_vars[18];
3162 ctl_table addrconf_dev[2];
3163 ctl_table addrconf_conf_dir[2];
3164 ctl_table addrconf_proto_dir[2];
3165 ctl_table addrconf_root_dir[2];
3166 } addrconf_sysctl = {
3167 .sysctl_header = NULL,
3170 .ctl_name = NET_IPV6_FORWARDING,
3171 .procname = "forwarding",
3172 .data = &ipv6_devconf.forwarding,
3173 .maxlen = sizeof(int),
3175 .proc_handler = &addrconf_sysctl_forward,
3176 .strategy = &addrconf_sysctl_forward_strategy,
3179 .ctl_name = NET_IPV6_HOP_LIMIT,
3180 .procname = "hop_limit",
3181 .data = &ipv6_devconf.hop_limit,
3182 .maxlen = sizeof(int),
3184 .proc_handler = proc_dointvec,
3187 .ctl_name = NET_IPV6_MTU,
3189 .data = &ipv6_devconf.mtu6,
3190 .maxlen = sizeof(int),
3192 .proc_handler = &proc_dointvec,
3195 .ctl_name = NET_IPV6_ACCEPT_RA,
3196 .procname = "accept_ra",
3197 .data = &ipv6_devconf.accept_ra,
3198 .maxlen = sizeof(int),
3200 .proc_handler = &proc_dointvec,
3203 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3204 .procname = "accept_redirects",
3205 .data = &ipv6_devconf.accept_redirects,
3206 .maxlen = sizeof(int),
3208 .proc_handler = &proc_dointvec,
3211 .ctl_name = NET_IPV6_AUTOCONF,
3212 .procname = "autoconf",
3213 .data = &ipv6_devconf.autoconf,
3214 .maxlen = sizeof(int),
3216 .proc_handler = &proc_dointvec,
3219 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3220 .procname = "dad_transmits",
3221 .data = &ipv6_devconf.dad_transmits,
3222 .maxlen = sizeof(int),
3224 .proc_handler = &proc_dointvec,
3227 .ctl_name = NET_IPV6_RTR_SOLICITS,
3228 .procname = "router_solicitations",
3229 .data = &ipv6_devconf.rtr_solicits,
3230 .maxlen = sizeof(int),
3232 .proc_handler = &proc_dointvec,
3235 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3236 .procname = "router_solicitation_interval",
3237 .data = &ipv6_devconf.rtr_solicit_interval,
3238 .maxlen = sizeof(int),
3240 .proc_handler = &proc_dointvec_jiffies,
3241 .strategy = &sysctl_jiffies,
3244 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3245 .procname = "router_solicitation_delay",
3246 .data = &ipv6_devconf.rtr_solicit_delay,
3247 .maxlen = sizeof(int),
3249 .proc_handler = &proc_dointvec_jiffies,
3250 .strategy = &sysctl_jiffies,
3253 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3254 .procname = "force_mld_version",
3255 .data = &ipv6_devconf.force_mld_version,
3256 .maxlen = sizeof(int),
3258 .proc_handler = &proc_dointvec,
3260 #ifdef CONFIG_IPV6_PRIVACY
3262 .ctl_name = NET_IPV6_USE_TEMPADDR,
3263 .procname = "use_tempaddr",
3264 .data = &ipv6_devconf.use_tempaddr,
3265 .maxlen = sizeof(int),
3267 .proc_handler = &proc_dointvec,
3270 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3271 .procname = "temp_valid_lft",
3272 .data = &ipv6_devconf.temp_valid_lft,
3273 .maxlen = sizeof(int),
3275 .proc_handler = &proc_dointvec,
3278 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3279 .procname = "temp_prefered_lft",
3280 .data = &ipv6_devconf.temp_prefered_lft,
3281 .maxlen = sizeof(int),
3283 .proc_handler = &proc_dointvec,
3286 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3287 .procname = "regen_max_retry",
3288 .data = &ipv6_devconf.regen_max_retry,
3289 .maxlen = sizeof(int),
3291 .proc_handler = &proc_dointvec,
3294 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3295 .procname = "max_desync_factor",
3296 .data = &ipv6_devconf.max_desync_factor,
3297 .maxlen = sizeof(int),
3299 .proc_handler = &proc_dointvec,
3303 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3304 .procname = "max_addresses",
3305 .data = &ipv6_devconf.max_addresses,
3306 .maxlen = sizeof(int),
3308 .proc_handler = &proc_dointvec,
3311 .ctl_name = 0, /* sentinel */
3316 .ctl_name = NET_PROTO_CONF_ALL,
3319 .child = addrconf_sysctl.addrconf_vars,
3322 .ctl_name = 0, /* sentinel */
3325 .addrconf_conf_dir = {
3327 .ctl_name = NET_IPV6_CONF,
3330 .child = addrconf_sysctl.addrconf_dev,
3333 .ctl_name = 0, /* sentinel */
3336 .addrconf_proto_dir = {
3338 .ctl_name = NET_IPV6,
3341 .child = addrconf_sysctl.addrconf_conf_dir,
3344 .ctl_name = 0, /* sentinel */
3347 .addrconf_root_dir = {
3349 .ctl_name = CTL_NET,
3352 .child = addrconf_sysctl.addrconf_proto_dir,
3355 .ctl_name = 0, /* sentinel */
3360 static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3363 struct net_device *dev = idev ? idev->dev : NULL;
3364 struct addrconf_sysctl_table *t;
3365 char *dev_name = NULL;
3367 t = kmalloc(sizeof(*t), GFP_KERNEL);
3370 memcpy(t, &addrconf_sysctl, sizeof(*t));
3371 for (i=0; t->addrconf_vars[i].data; i++) {
3372 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3373 t->addrconf_vars[i].de = NULL;
3374 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3377 dev_name = dev->name;
3378 t->addrconf_dev[0].ctl_name = dev->ifindex;
3380 dev_name = "default";
3381 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3385 * Make a copy of dev_name, because '.procname' is regarded as const
3386 * by sysctl and we wouldn't want anyone to change it under our feet
3387 * (see SIOCSIFNAME).
3389 dev_name = net_sysctl_strdup(dev_name);
3393 t->addrconf_dev[0].procname = dev_name;
3395 t->addrconf_dev[0].child = t->addrconf_vars;
3396 t->addrconf_dev[0].de = NULL;
3397 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3398 t->addrconf_conf_dir[0].de = NULL;
3399 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3400 t->addrconf_proto_dir[0].de = NULL;
3401 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3402 t->addrconf_root_dir[0].de = NULL;
3404 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3405 if (t->sysctl_header == NULL)
3420 static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3423 struct addrconf_sysctl_table *t = p->sysctl;
3425 unregister_sysctl_table(t->sysctl_header);
3426 kfree(t->addrconf_dev[0].procname);
3438 int register_inet6addr_notifier(struct notifier_block *nb)
3440 return notifier_chain_register(&inet6addr_chain, nb);
3443 int unregister_inet6addr_notifier(struct notifier_block *nb)
3445 return notifier_chain_unregister(&inet6addr_chain,nb);
3449 * Init / cleanup code
3452 void __init addrconf_init(void)
3454 /* The addrconf netdev notifier requires that loopback_dev
3455 * has it's ipv6 private information allocated and setup
3456 * before it can bring up and give link-local addresses
3457 * to other devices which are up.
3459 * Unfortunately, loopback_dev is not necessarily the first
3460 * entry in the global dev_base list of net devices. In fact,
3461 * it is likely to be the very last entry on that list.
3462 * So this causes the notifier registry below to try and
3463 * give link-local addresses to all devices besides loopback_dev
3464 * first, then loopback_dev, which cases all the non-loopback_dev
3465 * devices to fail to get a link-local address.
3467 * So, as a temporary fix, register loopback_dev first by hand.
3468 * Longer term, all of the dependencies ipv6 has upon the loopback
3469 * device and it being up should be removed.
3472 addrconf_notify(&ipv6_dev_notf, NETDEV_REGISTER, &loopback_dev);
3473 if (loopback_dev.flags & IFF_UP)
3474 addrconf_notify(&ipv6_dev_notf, NETDEV_UP, &loopback_dev);
3477 register_netdevice_notifier(&ipv6_dev_notf);
3479 #ifdef CONFIG_IPV6_PRIVACY
3480 md5_tfm = crypto_alloc_tfm("md5", 0);
3481 if (unlikely(md5_tfm == NULL))
3483 "failed to load transform for md5\n");
3487 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3488 #ifdef CONFIG_SYSCTL
3489 addrconf_sysctl.sysctl_header =
3490 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
3491 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
3495 void __exit addrconf_cleanup(void)
3497 struct net_device *dev;
3498 struct inet6_dev *idev;
3499 struct inet6_ifaddr *ifa;
3502 unregister_netdevice_notifier(&ipv6_dev_notf);
3504 rtnetlink_links[PF_INET6] = NULL;
3505 #ifdef CONFIG_SYSCTL
3506 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
3507 addrconf_sysctl_unregister(&ipv6_devconf);
3516 for (dev=dev_base; dev; dev=dev->next) {
3517 if ((idev = __in6_dev_get(dev)) == NULL)
3519 addrconf_ifdown(dev, 1);
3526 write_lock_bh(&addrconf_hash_lock);
3527 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3528 for (ifa=inet6_addr_lst[i]; ifa; ) {
3529 struct inet6_ifaddr *bifa;
3532 ifa = ifa->lst_next;
3533 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
3534 /* Do not free it; something is wrong.
3535 Now we can investigate it with debugger.
3539 write_unlock_bh(&addrconf_hash_lock);
3541 del_timer(&addr_chk_timer);
3545 #ifdef CONFIG_IPV6_PRIVACY
3546 if (likely(md5_tfm != NULL)) {
3547 crypto_free_tfm(md5_tfm);
3552 #ifdef CONFIG_PROC_FS
3553 proc_net_remove("if_inet6");