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[IPV4]: When possible test for IFF_LOOPBACK and not dev == loopback_dev
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
10 *
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.
15 */
16
17/*
18 * Changes:
19 *
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
23 * unload.
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
26 * packets.
27 * yoshfuji@USAGI : Fixed interval between DAD
28 * packets.
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
32 * support.
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
37 * seq_file.
b1cacb68
YH		 38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
40 * status etc.
1da177e4
LT		 41 */
42
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
1da177e4
LT		 47#include <linux/net.h>
48#include <linux/in6.h>
49#include <linux/netdevice.h>
1823730f 50#include <linux/if_addr.h>
1da177e4
LT		 51#include <linux/if_arp.h>
52#include <linux/if_arcnet.h>
53#include <linux/if_infiniband.h>
54#include <linux/route.h>
55#include <linux/inetdevice.h>
56#include <linux/init.h>
57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
5d620266 76#include <net/netlink.h>
1da177e4
LT		 77#include <linux/if_tunnel.h>
78#include <linux/rtnetlink.h>
79
80#ifdef CONFIG_IPV6_PRIVACY
81#include <linux/random.h>
1da177e4
LT		 82#endif
83
84#include <asm/uaccess.h>
7f7d9a6b 85#include <asm/unaligned.h>
1da177e4
LT		 86
87#include <linux/proc_fs.h>
88#include <linux/seq_file.h>
89
90/* Set to 3 to get tracing... */
91#define ACONF_DEBUG 2
92
93#if ACONF_DEBUG >= 3
94#define ADBG(x) printk x
95#else
96#define ADBG(x)
97#endif
98
99#define INFINITY_LIFE_TIME 0xFFFFFFFF
100#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101
102#ifdef CONFIG_SYSCTL
103static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
104static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
105#endif
106
107#ifdef CONFIG_IPV6_PRIVACY
108static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 109static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 110static void ipv6_regen_rndid(unsigned long data);
111
112static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 113#endif
114
115static int ipv6_count_addresses(struct inet6_dev *idev);
116
117/*
118 * Configured unicast address hash table
119 */
120static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
121static DEFINE_RWLOCK(addrconf_hash_lock);
122
1da177e4
LT		 123static void addrconf_verify(unsigned long);
124
8d06afab 125static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 126static DEFINE_SPINLOCK(addrconf_verify_lock);
127
128static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
129static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
130
131static int addrconf_ifdown(struct net_device *dev, int how);
132
e431b8c0 133static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 134static void addrconf_dad_timer(unsigned long data);
135static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 136static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 137static void addrconf_rs_timer(unsigned long data);
138static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
139static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140
1ab1457c 141static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 142 struct prefix_info *pinfo);
143static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
144
e041c683 145static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 146
ab32ea5d 147struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 148 .forwarding = 0,
149 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
150 .mtu6 = IPV6_MIN_MTU,
151 .accept_ra = 1,
152 .accept_redirects = 1,
153 .autoconf = 1,
154 .force_mld_version = 0,
155 .dad_transmits = 1,
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
160 .use_tempaddr = 0,
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,
165#endif
166 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 167 .accept_ra_defrtr = 1,
c4fd30eb 168 .accept_ra_pinfo = 1,
930d6ff2
YH		 169#ifdef CONFIG_IPV6_ROUTER_PREF
170 .accept_ra_rtr_pref = 1,
52e16356 171 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 172#ifdef CONFIG_IPV6_ROUTE_INFO
173 .accept_ra_rt_info_max_plen = 0,
174#endif
930d6ff2 175#endif
fbea49e1 176 .proxy_ndp = 0,
0bcbc926 177 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 178};
179
ab32ea5d 180static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 181 .forwarding = 0,
182 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
183 .mtu6 = IPV6_MIN_MTU,
184 .accept_ra = 1,
185 .accept_redirects = 1,
186 .autoconf = 1,
187 .dad_transmits = 1,
188 .rtr_solicits = MAX_RTR_SOLICITATIONS,
189 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
190 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
191#ifdef CONFIG_IPV6_PRIVACY
192 .use_tempaddr = 0,
193 .temp_valid_lft = TEMP_VALID_LIFETIME,
194 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
195 .regen_max_retry = REGEN_MAX_RETRY,
196 .max_desync_factor = MAX_DESYNC_FACTOR,
197#endif
198 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 199 .accept_ra_defrtr = 1,
c4fd30eb 200 .accept_ra_pinfo = 1,
930d6ff2
YH		 201#ifdef CONFIG_IPV6_ROUTER_PREF
202 .accept_ra_rtr_pref = 1,
52e16356 203 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 204#ifdef CONFIG_IPV6_ROUTE_INFO
205 .accept_ra_rt_info_max_plen = 0,
206#endif
930d6ff2 207#endif
fbea49e1 208 .proxy_ndp = 0,
0bcbc926 209 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 210};
211
212/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 213const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4
LT		 214const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
215
1da177e4
LT		 216static void addrconf_del_timer(struct inet6_ifaddr *ifp)
217{
218 if (del_timer(&ifp->timer))
219 __in6_ifa_put(ifp);
220}
221
222enum addrconf_timer_t
223{
224 AC_NONE,
225 AC_DAD,
226 AC_RS,
227};
228
229static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
230 enum addrconf_timer_t what,
231 unsigned long when)
232{
233 if (!del_timer(&ifp->timer))
234 in6_ifa_hold(ifp);
235
236 switch (what) {
237 case AC_DAD:
238 ifp->timer.function = addrconf_dad_timer;
239 break;
240 case AC_RS:
241 ifp->timer.function = addrconf_rs_timer;
242 break;
243 default:;
244 }
245 ifp->timer.expires = jiffies + when;
246 add_timer(&ifp->timer);
247}
248
7f7d9a6b
HX		 249static int snmp6_alloc_dev(struct inet6_dev *idev)
250{
251 int err = -ENOMEM;
252
253 if (!idev || !idev->dev)
254 return -EINVAL;
255
256 if (snmp_mib_init((void **)idev->stats.ipv6,
257 sizeof(struct ipstats_mib),
258 __alignof__(struct ipstats_mib)) < 0)
259 goto err_ip;
260 if (snmp_mib_init((void **)idev->stats.icmpv6,
261 sizeof(struct icmpv6_mib),
262 __alignof__(struct icmpv6_mib)) < 0)
263 goto err_icmp;
14878f75
DS		 264 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
265 sizeof(struct icmpv6msg_mib),
266 __alignof__(struct icmpv6msg_mib)) < 0)
267 goto err_icmpmsg;
7f7d9a6b
HX		 268
269 return 0;
270
14878f75
DS		 271err_icmpmsg:
272 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 273err_icmp:
274 snmp_mib_free((void **)idev->stats.ipv6);
275err_ip:
276 return err;
277}
278
279static int snmp6_free_dev(struct inet6_dev *idev)
280{
14878f75 281 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 282 snmp_mib_free((void **)idev->stats.icmpv6);
283 snmp_mib_free((void **)idev->stats.ipv6);
284 return 0;
285}
286
1da177e4
LT		 287/* Nobody refers to this device, we may destroy it. */
288
8814c4b5
YH		 289static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
290{
291 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
292 kfree(idev);
293}
294
1da177e4
LT		 295void in6_dev_finish_destroy(struct inet6_dev *idev)
296{
297 struct net_device *dev = idev->dev;
298 BUG_TRAP(idev->addr_list==NULL);
299 BUG_TRAP(idev->mc_list==NULL);
300#ifdef NET_REFCNT_DEBUG
301 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
302#endif
303 dev_put(dev);
304 if (!idev->dead) {
305 printk("Freeing alive inet6 device %p\n", idev);
306 return;
307 }
308 snmp6_free_dev(idev);
8814c4b5 309 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 310}
311
7159039a
YH		 312EXPORT_SYMBOL(in6_dev_finish_destroy);
313
1da177e4
LT		 314static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
315{
316 struct inet6_dev *ndev;
d88ae4cc 317 struct in6_addr maddr;
1da177e4
LT		 318
319 ASSERT_RTNL();
320
321 if (dev->mtu < IPV6_MIN_MTU)
322 return NULL;
323
1ab1457c 324 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 325
1ab1457c
YH		 326 if (ndev == NULL)
327 return NULL;
322f74a4
IO		 328
329 rwlock_init(&ndev->lock);
330 ndev->dev = dev;
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) {
336 kfree(ndev);
337 return NULL;
338 }
339 /* We refer to the device */
340 dev_hold(dev);
1da177e4 341
322f74a4
IO		 342 if (snmp6_alloc_dev(ndev) < 0) {
343 ADBG((KERN_WARNING
344 "%s(): cannot allocate memory for statistics; dev=%s.\n",
345 __FUNCTION__, dev->name));
346 neigh_parms_release(&nd_tbl, ndev->nd_parms);
347 ndev->dead = 1;
348 in6_dev_finish_destroy(ndev);
349 return NULL;
350 }
1da177e4 351
322f74a4
IO		 352 if (snmp6_register_dev(ndev) < 0) {
353 ADBG((KERN_WARNING
354 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
355 __FUNCTION__, dev->name));
356 neigh_parms_release(&nd_tbl, ndev->nd_parms);
357 ndev->dead = 1;
358 in6_dev_finish_destroy(ndev);
359 return NULL;
360 }
361
362 /* One reference from device. We must do this before
363 * we invoke __ipv6_regen_rndid().
364 */
365 in6_dev_hold(ndev);
1da177e4
LT		 366
367#ifdef CONFIG_IPV6_PRIVACY
322f74a4
IO		 368 init_timer(&ndev->regen_timer);
369 ndev->regen_timer.function = ipv6_regen_rndid;
370 ndev->regen_timer.data = (unsigned long) ndev;
371 if ((dev->flags&IFF_LOOPBACK) ||
372 dev->type == ARPHRD_TUNNEL ||
0be669bb
JR		 373#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
374 dev->type == ARPHRD_SIT ||
375#endif
376 dev->type == ARPHRD_NONE) {
322f74a4
IO		 377 printk(KERN_INFO
378 "%s: Disabled Privacy Extensions\n",
379 dev->name);
380 ndev->cnf.use_tempaddr = -1;
381 } else {
382 in6_dev_hold(ndev);
383 ipv6_regen_rndid((unsigned long) ndev);
384 }
1da177e4
LT		 385#endif
386
53aadcc9
HX		 387 if (netif_running(dev) && netif_carrier_ok(dev))
388 ndev->if_flags |= IF_READY;
389
322f74a4
IO		 390 ipv6_mc_init_dev(ndev);
391 ndev->tstamp = jiffies;
1da177e4 392#ifdef CONFIG_SYSCTL
322f74a4
IO		 393 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
394 NET_IPV6_NEIGH, "ipv6",
395 &ndisc_ifinfo_sysctl_change,
396 NULL);
397 addrconf_sysctl_register(ndev, &ndev->cnf);
1da177e4 398#endif
30c4cf57
DS		 399 /* protected by rtnl_lock */
400 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 401
402 /* Join all-node multicast group */
403 ipv6_addr_all_nodes(&maddr);
404 ipv6_dev_mc_inc(dev, &maddr);
405
1da177e4
LT		 406 return ndev;
407}
408
409static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
410{
411 struct inet6_dev *idev;
412
413 ASSERT_RTNL();
414
415 if ((idev = __in6_dev_get(dev)) == NULL) {
416 if ((idev = ipv6_add_dev(dev)) == NULL)
417 return NULL;
418 }
c5e33bdd 419
1da177e4
LT		 420 if (dev->flags&IFF_UP)
421 ipv6_mc_up(idev);
422 return idev;
423}
424
425#ifdef CONFIG_SYSCTL
426static void dev_forward_change(struct inet6_dev *idev)
427{
428 struct net_device *dev;
429 struct inet6_ifaddr *ifa;
430 struct in6_addr addr;
431
432 if (!idev)
433 return;
434 dev = idev->dev;
435 if (dev && (dev->flags & IFF_MULTICAST)) {
436 ipv6_addr_all_routers(&addr);
1ab1457c 437
1da177e4
LT		 438 if (idev->cnf.forwarding)
439 ipv6_dev_mc_inc(dev, &addr);
440 else
441 ipv6_dev_mc_dec(dev, &addr);
442 }
443 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 444 if (ifa->flags&IFA_F_TENTATIVE)
445 continue;
1da177e4
LT		 446 if (idev->cnf.forwarding)
447 addrconf_join_anycast(ifa);
448 else
449 addrconf_leave_anycast(ifa);
450 }
451}
452
453
454static void addrconf_forward_change(void)
455{
456 struct net_device *dev;
457 struct inet6_dev *idev;
458
459 read_lock(&dev_base_lock);
881d966b 460 for_each_netdev(&init_net, dev) {
8814c4b5 461 rcu_read_lock();
1da177e4
LT		 462 idev = __in6_dev_get(dev);
463 if (idev) {
464 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
465 idev->cnf.forwarding = ipv6_devconf.forwarding;
466 if (changed)
467 dev_forward_change(idev);
468 }
8814c4b5 469 rcu_read_unlock();
1da177e4
LT		 470 }
471 read_unlock(&dev_base_lock);
472}
473#endif
474
475/* Nobody refers to this ifaddr, destroy it */
476
477void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
478{
479 BUG_TRAP(ifp->if_next==NULL);
480 BUG_TRAP(ifp->lst_next==NULL);
481#ifdef NET_REFCNT_DEBUG
482 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
483#endif
484
485 in6_dev_put(ifp->idev);
486
487 if (del_timer(&ifp->timer))
488 printk("Timer is still running, when freeing ifa=%p\n", ifp);
489
490 if (!ifp->dead) {
491 printk("Freeing alive inet6 address %p\n", ifp);
492 return;
493 }
494 dst_release(&ifp->rt->u.dst);
495
496 kfree(ifp);
497}
498
e55ffac6
BH		 499static void
500ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
501{
502 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 503 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 504
505 /*
506 * Each device address list is sorted in order of scope -
507 * global before linklocal.
508 */
509 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
510 ifap = &ifa->if_next) {
8a6ce0c0 511 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 512 break;
513 }
514
515 ifp->if_next = *ifap;
516 *ifap = ifp;
517}
518
1da177e4
LT		 519/* On success it returns ifp with increased reference count */
520
521static struct inet6_ifaddr *
522ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 523 int scope, u32 flags)
1da177e4
LT		 524{
525 struct inet6_ifaddr *ifa = NULL;
526 struct rt6_info *rt;
527 int hash;
528 int err = 0;
529
8814c4b5 530 rcu_read_lock_bh();
1da177e4
LT		 531 if (idev->dead) {
532 err = -ENODEV; /*XXX*/
533 goto out2;
534 }
535
536 write_lock(&addrconf_hash_lock);
537
538 /* Ignore adding duplicate addresses on an interface */
539 if (ipv6_chk_same_addr(addr, idev->dev)) {
540 ADBG(("ipv6_add_addr: already assigned\n"));
541 err = -EEXIST;
542 goto out;
543 }
544
322f74a4 545 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 546
547 if (ifa == NULL) {
548 ADBG(("ipv6_add_addr: malloc failed\n"));
549 err = -ENOBUFS;
550 goto out;
551 }
552
553 rt = addrconf_dst_alloc(idev, addr, 0);
554 if (IS_ERR(rt)) {
555 err = PTR_ERR(rt);
556 goto out;
557 }
558
1da177e4
LT		 559 ipv6_addr_copy(&ifa->addr, addr);
560
561 spin_lock_init(&ifa->lock);
562 init_timer(&ifa->timer);
563 ifa->timer.data = (unsigned long) ifa;
564 ifa->scope = scope;
565 ifa->prefix_len = pfxlen;
566 ifa->flags = flags | IFA_F_TENTATIVE;
567 ifa->cstamp = ifa->tstamp = jiffies;
568
57f5f544
KF		 569 ifa->rt = rt;
570
95c385b4
NH		 571 /*
572 * part one of RFC 4429, section 3.3
573 * We should not configure an address as
574 * optimistic if we do not yet know the link
575 * layer address of our nexhop router
576 */
577
578 if (rt->rt6i_nexthop == NULL)
579 ifa->flags &= ~IFA_F_OPTIMISTIC;
580
1da177e4
LT		 581 ifa->idev = idev;
582 in6_dev_hold(idev);
583 /* For caller */
584 in6_ifa_hold(ifa);
585
586 /* Add to big hash table */
587 hash = ipv6_addr_hash(addr);
588
589 ifa->lst_next = inet6_addr_lst[hash];
590 inet6_addr_lst[hash] = ifa;
591 in6_ifa_hold(ifa);
592 write_unlock(&addrconf_hash_lock);
593
594 write_lock(&idev->lock);
595 /* Add to inet6_dev unicast addr list. */
e55ffac6 596 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 597
598#ifdef CONFIG_IPV6_PRIVACY
599 if (ifa->flags&IFA_F_TEMPORARY) {
600 ifa->tmp_next = idev->tempaddr_list;
601 idev->tempaddr_list = ifa;
602 in6_ifa_hold(ifa);
603 }
604#endif
605
1da177e4
LT		 606 in6_ifa_hold(ifa);
607 write_unlock(&idev->lock);
608out2:
8814c4b5 609 rcu_read_unlock_bh();
1da177e4 610
fd92833a 611 if (likely(err == 0))
e041c683 612 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 613 else {
614 kfree(ifa);
615 ifa = ERR_PTR(err);
616 }
617
618 return ifa;
619out:
620 write_unlock(&addrconf_hash_lock);
621 goto out2;
622}
623
624/* This function wants to get referenced ifp and releases it before return */
625
626static void ipv6_del_addr(struct inet6_ifaddr *ifp)
627{
628 struct inet6_ifaddr *ifa, **ifap;
629 struct inet6_dev *idev = ifp->idev;
630 int hash;
631 int deleted = 0, onlink = 0;
632 unsigned long expires = jiffies;
633
634 hash = ipv6_addr_hash(&ifp->addr);
635
636 ifp->dead = 1;
637
638 write_lock_bh(&addrconf_hash_lock);
639 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
640 ifap = &ifa->lst_next) {
641 if (ifa == ifp) {
642 *ifap = ifa->lst_next;
643 __in6_ifa_put(ifp);
644 ifa->lst_next = NULL;
645 break;
646 }
647 }
648 write_unlock_bh(&addrconf_hash_lock);
649
650 write_lock_bh(&idev->lock);
651#ifdef CONFIG_IPV6_PRIVACY
652 if (ifp->flags&IFA_F_TEMPORARY) {
653 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
654 ifap = &ifa->tmp_next) {
655 if (ifa == ifp) {
656 *ifap = ifa->tmp_next;
657 if (ifp->ifpub) {
658 in6_ifa_put(ifp->ifpub);
659 ifp->ifpub = NULL;
660 }
661 __in6_ifa_put(ifp);
662 ifa->tmp_next = NULL;
663 break;
664 }
665 }
666 }
667#endif
668
1d142804 669 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 670 if (ifa == ifp) {
671 *ifap = ifa->if_next;
672 __in6_ifa_put(ifp);
673 ifa->if_next = NULL;
674 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
675 break;
676 deleted = 1;
1d142804 677 continue;
1da177e4
LT		 678 } else if (ifp->flags & IFA_F_PERMANENT) {
679 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
680 ifp->prefix_len)) {
681 if (ifa->flags & IFA_F_PERMANENT) {
682 onlink = 1;
683 if (deleted)
684 break;
685 } else {
686 unsigned long lifetime;
687
688 if (!onlink)
689 onlink = -1;
690
691 spin_lock(&ifa->lock);
692 lifetime = min_t(unsigned long,
693 ifa->valid_lft, 0x7fffffffUL/HZ);
694 if (time_before(expires,
695 ifa->tstamp + lifetime * HZ))
696 expires = ifa->tstamp + lifetime * HZ;
697 spin_unlock(&ifa->lock);
698 }
699 }
700 }
1d142804 701 ifap = &ifa->if_next;
1da177e4
LT		 702 }
703 write_unlock_bh(&idev->lock);
704
705 ipv6_ifa_notify(RTM_DELADDR, ifp);
706
e041c683 707 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 708
709 addrconf_del_timer(ifp);
710
711 /*
712 * Purge or update corresponding prefix
713 *
714 * 1) we don't purge prefix here if address was not permanent.
715 * prefix is managed by its own lifetime.
716 * 2) if there're no addresses, delete prefix.
717 * 3) if there're still other permanent address(es),
718 * corresponding prefix is still permanent.
719 * 4) otherwise, update prefix lifetime to the
720 * longest valid lifetime among the corresponding
721 * addresses on the device.
722 * Note: subsequent RA will update lifetime.
723 *
724 * --yoshfuji
725 */
726 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
727 struct in6_addr prefix;
728 struct rt6_info *rt;
729
730 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
731 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
732
733 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
734 if (onlink == 0) {
e0a1ad73 735 ip6_del_rt(rt);
1da177e4
LT		 736 rt = NULL;
737 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
738 rt->rt6i_expires = expires;
739 rt->rt6i_flags |= RTF_EXPIRES;
740 }
741 }
742 dst_release(&rt->u.dst);
743 }
744
745 in6_ifa_put(ifp);
746}
747
748#ifdef CONFIG_IPV6_PRIVACY
749static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
750{
751 struct inet6_dev *idev = ifp->idev;
752 struct in6_addr addr, *tmpaddr;
753 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
754 int tmp_plen;
755 int ret = 0;
756 int max_addresses;
95c385b4 757 u32 addr_flags;
1da177e4
LT		 758
759 write_lock(&idev->lock);
760 if (ift) {
761 spin_lock_bh(&ift->lock);
762 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
763 spin_unlock_bh(&ift->lock);
764 tmpaddr = &addr;
765 } else {
766 tmpaddr = NULL;
767 }
768retry:
769 in6_dev_hold(idev);
770 if (idev->cnf.use_tempaddr <= 0) {
771 write_unlock(&idev->lock);
772 printk(KERN_INFO
773 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
774 in6_dev_put(idev);
775 ret = -1;
776 goto out;
777 }
778 spin_lock_bh(&ifp->lock);
779 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
780 idev->cnf.use_tempaddr = -1; /*XXX*/
781 spin_unlock_bh(&ifp->lock);
782 write_unlock(&idev->lock);
783 printk(KERN_WARNING
784 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
785 in6_dev_put(idev);
786 ret = -1;
787 goto out;
788 }
789 in6_ifa_hold(ifp);
790 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
791 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
792 spin_unlock_bh(&ifp->lock);
793 write_unlock(&idev->lock);
794 printk(KERN_WARNING
795 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
796 in6_ifa_put(ifp);
797 in6_dev_put(idev);
798 ret = -1;
799 goto out;
800 }
801 memcpy(&addr.s6_addr[8], idev->rndid, 8);
802 tmp_valid_lft = min_t(__u32,
803 ifp->valid_lft,
804 idev->cnf.temp_valid_lft);
1ab1457c
YH		 805 tmp_prefered_lft = min_t(__u32,
806 ifp->prefered_lft,
1da177e4
LT		 807 idev->cnf.temp_prefered_lft - desync_factor / HZ);
808 tmp_plen = ifp->prefix_len;
809 max_addresses = idev->cnf.max_addresses;
810 tmp_cstamp = ifp->cstamp;
811 tmp_tstamp = ifp->tstamp;
812 spin_unlock_bh(&ifp->lock);
813
814 write_unlock(&idev->lock);
95c385b4
NH		 815
816 addr_flags = IFA_F_TEMPORARY;
817 /* set in addrconf_prefix_rcv() */
818 if (ifp->flags & IFA_F_OPTIMISTIC)
819 addr_flags |= IFA_F_OPTIMISTIC;
820
1da177e4 821 ift = !max_addresses ||
1ab1457c 822 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 823 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 824 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
825 addr_flags) : NULL;
1da177e4
LT		 826 if (!ift || IS_ERR(ift)) {
827 in6_ifa_put(ifp);
828 in6_dev_put(idev);
829 printk(KERN_INFO
830 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
831 tmpaddr = &addr;
832 write_lock(&idev->lock);
833 goto retry;
834 }
835
836 spin_lock_bh(&ift->lock);
837 ift->ifpub = ifp;
838 ift->valid_lft = tmp_valid_lft;
839 ift->prefered_lft = tmp_prefered_lft;
840 ift->cstamp = tmp_cstamp;
841 ift->tstamp = tmp_tstamp;
842 spin_unlock_bh(&ift->lock);
843
844 addrconf_dad_start(ift, 0);
845 in6_ifa_put(ift);
846 in6_dev_put(idev);
847out:
848 return ret;
849}
850#endif
851
852/*
072047e4 853 * Choose an appropriate source address (RFC3484)
1da177e4 854 */
072047e4
YH		 855struct ipv6_saddr_score {
856 int addr_type;
857 unsigned int attrs;
858 int matchlen;
0d27b427 859 int scope;
072047e4
YH		 860 unsigned int rule;
861};
862
863#define IPV6_SADDR_SCORE_LOCAL 0x0001
864#define IPV6_SADDR_SCORE_PREFERRED 0x0004
865#define IPV6_SADDR_SCORE_HOA 0x0008
866#define IPV6_SADDR_SCORE_OIF 0x0010
867#define IPV6_SADDR_SCORE_LABEL 0x0020
868#define IPV6_SADDR_SCORE_PRIVACY 0x0040
869
b6f99a21 870static inline int ipv6_saddr_preferred(int type)
1da177e4 871{
072047e4
YH		 872 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
873 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
874 return 1;
875 return 0;
1da177e4
LT		 876}
877
072047e4 878/* static matching label */
b6f99a21 879static inline int ipv6_saddr_label(const struct in6_addr *addr, int type)
072047e4
YH		 880{
881 /*
882 * prefix (longest match) label
883 * -----------------------------
884 * ::1/128 0
885 * ::/0 1
886 * 2002::/16 2
887 * ::/96 3
888 * ::ffff:0:0/96 4
102128e3
ŁS		 889 * fc00::/7 5
890 * 2001::/32 6
072047e4
YH		 891 */
892 if (type & IPV6_ADDR_LOOPBACK)
893 return 0;
894 else if (type & IPV6_ADDR_COMPATv4)
895 return 3;
896 else if (type & IPV6_ADDR_MAPPED)
897 return 4;
102128e3
ŁS		 898 else if (addr->s6_addr32[0] == htonl(0x20010000))
899 return 6;
072047e4
YH		 900 else if (addr->s6_addr16[0] == htons(0x2002))
901 return 2;
102128e3
ŁS		 902 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
903 return 5;
072047e4
YH		 904 return 1;
905}
1da177e4 906
072047e4 907int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 908 struct in6_addr *daddr, struct in6_addr *saddr)
909{
072047e4
YH		 910 struct ipv6_saddr_score hiscore;
911 struct inet6_ifaddr *ifa_result = NULL;
912 int daddr_type = __ipv6_addr_type(daddr);
913 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
914 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
915 struct net_device *dev;
1da177e4 916
072047e4 917 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 918
072047e4 919 read_lock(&dev_base_lock);
8814c4b5 920 rcu_read_lock();
1da177e4 921
881d966b 922 for_each_netdev(&init_net, dev) {
072047e4
YH		 923 struct inet6_dev *idev;
924 struct inet6_ifaddr *ifa;
925
926 /* Rule 0: Candidate Source Address (section 4)
927 * - multicast and link-local destination address,
928 * the set of candidate source address MUST only
929 * include addresses assigned to interfaces
930 * belonging to the same link as the outgoing
931 * interface.
932 * (- For site-local destination addresses, the
933 * set of candidate source addresses MUST only
934 * include addresses assigned to interfaces
935 * belonging to the same site as the outgoing
936 * interface.)
937 */
938 if ((daddr_type & IPV6_ADDR_MULTICAST ||
939 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
940 daddr_dev && dev != daddr_dev)
941 continue;
1da177e4 942
1da177e4 943 idev = __in6_dev_get(dev);
072047e4
YH		 944 if (!idev)
945 continue;
946
947 read_lock_bh(&idev->lock);
948 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
949 struct ipv6_saddr_score score;
950
951 score.addr_type = __ipv6_addr_type(&ifa->addr);
952
6b3ae80a
YH		 953 /* Rule 0:
954 * - Tentative Address (RFC2462 section 5.4)
955 * - A tentative address is not considered
956 * "assigned to an interface" in the traditional
95c385b4 957 * sense, unless it is also flagged as optimistic.
6b3ae80a 958 * - Candidate Source Address (section 4)
072047e4
YH		 959 * - In any case, anycast addresses, multicast
960 * addresses, and the unspecified address MUST
961 * NOT be included in a candidate set.
962 */
95c385b4
NH		 963 if ((ifa->flags & IFA_F_TENTATIVE) &&
964 (!(ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 965 continue;
072047e4
YH		 966 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
967 score.addr_type & IPV6_ADDR_MULTICAST)) {
968 LIMIT_NETDEBUG(KERN_DEBUG
969 "ADDRCONF: unspecified / multicast address"
970 "assigned as unicast address on %s",
971 dev->name);
972 continue;
973 }
974
975 score.attrs = 0;
976 score.matchlen = 0;
977 score.scope = 0;
978 score.rule = 0;
979
980 if (ifa_result == NULL) {
981 /* record it if the first available entry */
982 goto record_it;
983 }
984
985 /* Rule 1: Prefer same address */
986 if (hiscore.rule < 1) {
987 if (ipv6_addr_equal(&ifa_result->addr, daddr))
988 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
989 hiscore.rule++;
990 }
991 if (ipv6_addr_equal(&ifa->addr, daddr)) {
992 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
993 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
994 score.rule = 1;
995 goto record_it;
1da177e4 996 }
072047e4
YH		 997 } else {
998 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
999 continue;
1da177e4 1000 }
1da177e4 1001
072047e4
YH		 1002 /* Rule 2: Prefer appropriate scope */
1003 if (hiscore.rule < 2) {
1004 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1005 hiscore.rule++;
1006 }
1007 score.scope = __ipv6_addr_src_scope(score.addr_type);
1008 if (hiscore.scope < score.scope) {
1009 if (hiscore.scope < daddr_scope) {
1010 score.rule = 2;
1011 goto record_it;
1012 } else
1013 continue;
1014 } else if (score.scope < hiscore.scope) {
1015 if (score.scope < daddr_scope)
e55ffac6 1016 break; /* addresses sorted by scope */
072047e4
YH		 1017 else {
1018 score.rule = 2;
1019 goto record_it;
1020 }
1021 }
1da177e4 1022
95c385b4 1023 /* Rule 3: Avoid deprecated and optimistic addresses */
072047e4
YH		 1024 if (hiscore.rule < 3) {
1025 if (ipv6_saddr_preferred(hiscore.addr_type) ||
95c385b4
NH		 1026 (((ifa_result->flags &
1027 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
072047e4
YH		 1028 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1029 hiscore.rule++;
1030 }
1031 if (ipv6_saddr_preferred(score.addr_type) ||
6ae5f983 1032 (((ifa->flags &
95c385b4 1033 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
072047e4
YH		 1034 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1035 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1036 score.rule = 3;
1037 goto record_it;
1038 }
1039 } else {
1040 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1041 continue;
1042 }
1da177e4 1043
3b9f9a1c 1044 /* Rule 4: Prefer home address */
59fbb3a6 1045#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 1046 if (hiscore.rule < 4) {
1047 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1048 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1049 hiscore.rule++;
1050 }
1051 if (ifa->flags & IFA_F_HOMEADDRESS) {
1052 score.attrs |= IPV6_SADDR_SCORE_HOA;
1053 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1054 score.rule = 4;
1055 goto record_it;
1056 }
1057 } else {
1058 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1059 continue;
1060 }
1061#else
220bbd74
YH		 1062 if (hiscore.rule < 4)
1063 hiscore.rule++;
3b9f9a1c 1064#endif
072047e4
YH		 1065
1066 /* Rule 5: Prefer outgoing interface */
1067 if (hiscore.rule < 5) {
1068 if (daddr_dev == NULL ||
1069 daddr_dev == ifa_result->idev->dev)
1070 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1071 hiscore.rule++;
1072 }
1073 if (daddr_dev == NULL ||
1074 daddr_dev == ifa->idev->dev) {
1075 score.attrs |= IPV6_SADDR_SCORE_OIF;
1076 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1077 score.rule = 5;
1078 goto record_it;
1079 }
1080 } else {
1081 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1082 continue;
1083 }
1084
1085 /* Rule 6: Prefer matching label */
1086 if (hiscore.rule < 6) {
1087 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1088 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1089 hiscore.rule++;
1090 }
1091 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1092 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1093 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1094 score.rule = 6;
1095 goto record_it;
1da177e4 1096 }
072047e4
YH		 1097 } else {
1098 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1099 continue;
1100 }
1101
44fd0261 1102#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1103 /* Rule 7: Prefer public address
1104 * Note: prefer temprary address if use_tempaddr >= 2
1105 */
1106 if (hiscore.rule < 7) {
1107 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1108 (ifa_result->idev->cnf.use_tempaddr >= 2))
1109 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1110 hiscore.rule++;
1111 }
1112 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1113 (ifa->idev->cnf.use_tempaddr >= 2)) {
1114 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1115 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1116 score.rule = 7;
1117 goto record_it;
1118 }
1119 } else {
1120 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1121 continue;
1122 }
5e2707fa
YH		 1123#else
1124 if (hiscore.rule < 7)
1125 hiscore.rule++;
44fd0261 1126#endif
072047e4 1127 /* Rule 8: Use longest matching prefix */
12da2a43 1128 if (hiscore.rule < 8) {
072047e4 1129 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1130 hiscore.rule++;
1131 }
072047e4
YH		 1132 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1133 if (score.matchlen > hiscore.matchlen) {
1134 score.rule = 8;
1135 goto record_it;
1da177e4 1136 }
072047e4
YH		 1137#if 0
1138 else if (score.matchlen < hiscore.matchlen)
1139 continue;
1140#endif
1141
1142 /* Final Rule: choose first available one */
1143 continue;
1144record_it:
1145 if (ifa_result)
1146 in6_ifa_put(ifa_result);
1147 in6_ifa_hold(ifa);
1148 ifa_result = ifa;
1149 hiscore = score;
1da177e4 1150 }
072047e4 1151 read_unlock_bh(&idev->lock);
1da177e4 1152 }
8814c4b5 1153 rcu_read_unlock();
1da177e4
LT		 1154 read_unlock(&dev_base_lock);
1155
072047e4
YH		 1156 if (!ifa_result)
1157 return -EADDRNOTAVAIL;
1ab1457c 1158
072047e4
YH		 1159 ipv6_addr_copy(saddr, &ifa_result->addr);
1160 in6_ifa_put(ifa_result);
1161 return 0;
1da177e4
LT		 1162}
1163
1164
1165int ipv6_get_saddr(struct dst_entry *dst,
1166 struct in6_addr *daddr, struct in6_addr *saddr)
1167{
7a3025b1 1168 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1da177e4
LT		 1169}
1170
7159039a 1171EXPORT_SYMBOL(ipv6_get_saddr);
1da177e4 1172
95c385b4
NH		 1173int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1174 unsigned char banned_flags)
1da177e4
LT		 1175{
1176 struct inet6_dev *idev;
1177 int err = -EADDRNOTAVAIL;
1178
8814c4b5 1179 rcu_read_lock();
1da177e4
LT		 1180 if ((idev = __in6_dev_get(dev)) != NULL) {
1181 struct inet6_ifaddr *ifp;
1182
1183 read_lock_bh(&idev->lock);
1184 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1185 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1186 ipv6_addr_copy(addr, &ifp->addr);
1187 err = 0;
1188 break;
1189 }
1190 }
1191 read_unlock_bh(&idev->lock);
1192 }
8814c4b5 1193 rcu_read_unlock();
1da177e4
LT		 1194 return err;
1195}
1196
1197static int ipv6_count_addresses(struct inet6_dev *idev)
1198{
1199 int cnt = 0;
1200 struct inet6_ifaddr *ifp;
1201
1202 read_lock_bh(&idev->lock);
1203 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1204 cnt++;
1205 read_unlock_bh(&idev->lock);
1206 return cnt;
1207}
1208
1209int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1210{
1211 struct inet6_ifaddr * ifp;
1212 u8 hash = ipv6_addr_hash(addr);
1213
1214 read_lock_bh(&addrconf_hash_lock);
1215 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1216 if (ipv6_addr_equal(&ifp->addr, addr) &&
1217 !(ifp->flags&IFA_F_TENTATIVE)) {
1218 if (dev == NULL || ifp->idev->dev == dev ||
1219 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1220 break;
1221 }
1222 }
1223 read_unlock_bh(&addrconf_hash_lock);
1224 return ifp != NULL;
1225}
1226
7159039a
YH		 1227EXPORT_SYMBOL(ipv6_chk_addr);
1228
1da177e4
LT		 1229static
1230int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1231{
1232 struct inet6_ifaddr * ifp;
1233 u8 hash = ipv6_addr_hash(addr);
1234
1235 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1236 if (ipv6_addr_equal(&ifp->addr, addr)) {
1237 if (dev == NULL || ifp->idev->dev == dev)
1238 break;
1239 }
1240 }
1241 return ifp != NULL;
1242}
1243
1244struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1245{
1246 struct inet6_ifaddr * ifp;
1247 u8 hash = ipv6_addr_hash(addr);
1248
1249 read_lock_bh(&addrconf_hash_lock);
1250 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1251 if (ipv6_addr_equal(&ifp->addr, addr)) {
1252 if (dev == NULL || ifp->idev->dev == dev ||
1253 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1254 in6_ifa_hold(ifp);
1255 break;
1256 }
1257 }
1258 }
1259 read_unlock_bh(&addrconf_hash_lock);
1260
1261 return ifp;
1262}
1263
1264int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1265{
1266 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1267 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1268 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1269 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1270 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1271 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1272 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1273 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1274
1275 if (!sk2_rcv_saddr && !sk_ipv6only)
1276 return 1;
1277
1278 if (addr_type2 == IPV6_ADDR_ANY &&
1279 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1280 return 1;
1281
1282 if (addr_type == IPV6_ADDR_ANY &&
1283 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1284 return 1;
1285
1286 if (sk2_rcv_saddr6 &&
1287 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1288 return 1;
1289
1290 if (addr_type == IPV6_ADDR_MAPPED &&
1291 !sk2_ipv6only &&
1292 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1293 return 1;
1294
1295 return 0;
1296}
1297
1298/* Gets referenced address, destroys ifaddr */
1299
9f5336e2 1300static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1301{
1da177e4
LT		 1302 if (ifp->flags&IFA_F_PERMANENT) {
1303 spin_lock_bh(&ifp->lock);
1304 addrconf_del_timer(ifp);
1305 ifp->flags |= IFA_F_TENTATIVE;
1306 spin_unlock_bh(&ifp->lock);
1307 in6_ifa_put(ifp);
1308#ifdef CONFIG_IPV6_PRIVACY
1309 } else if (ifp->flags&IFA_F_TEMPORARY) {
1310 struct inet6_ifaddr *ifpub;
1311 spin_lock_bh(&ifp->lock);
1312 ifpub = ifp->ifpub;
1313 if (ifpub) {
1314 in6_ifa_hold(ifpub);
1315 spin_unlock_bh(&ifp->lock);
1316 ipv6_create_tempaddr(ifpub, ifp);
1317 in6_ifa_put(ifpub);
1318 } else {
1319 spin_unlock_bh(&ifp->lock);
1320 }
1321 ipv6_del_addr(ifp);
1322#endif
1323 } else
1324 ipv6_del_addr(ifp);
1325}
1326
3c21edbd
YH		 1327void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1328{
1329 if (net_ratelimit())
1330 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1331 addrconf_dad_stop(ifp);
1332}
1da177e4
LT		 1333
1334/* Join to solicited addr multicast group. */
1335
1336void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1337{
1338 struct in6_addr maddr;
1339
1340 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1341 return;
1342
1343 addrconf_addr_solict_mult(addr, &maddr);
1344 ipv6_dev_mc_inc(dev, &maddr);
1345}
1346
1347void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1348{
1349 struct in6_addr maddr;
1350
1351 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1352 return;
1353
1354 addrconf_addr_solict_mult(addr, &maddr);
1355 __ipv6_dev_mc_dec(idev, &maddr);
1356}
1357
20380731 1358static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1359{
1360 struct in6_addr addr;
1361 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1362 if (ipv6_addr_any(&addr))
1363 return;
1364 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1365}
1366
20380731 1367static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1368{
1369 struct in6_addr addr;
1370 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1371 if (ipv6_addr_any(&addr))
1372 return;
1373 __ipv6_dev_ac_dec(ifp->idev, &addr);
1374}
1375
073a8e0e
YH		 1376static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1377{
1378 if (dev->addr_len != ETH_ALEN)
1379 return -1;
1380 memcpy(eui, dev->dev_addr, 3);
1381 memcpy(eui + 5, dev->dev_addr + 3, 3);
1382
1383 /*
1384 * The zSeries OSA network cards can be shared among various
1385 * OS instances, but the OSA cards have only one MAC address.
1386 * This leads to duplicate address conflicts in conjunction
1387 * with IPv6 if more than one instance uses the same card.
1388 *
1389 * The driver for these cards can deliver a unique 16-bit
1390 * identifier for each instance sharing the same card. It is
1391 * placed instead of 0xFFFE in the interface identifier. The
1392 * "u" bit of the interface identifier is not inverted in this
1393 * case. Hence the resulting interface identifier has local
1394 * scope according to RFC2373.
1395 */
1396 if (dev->dev_id) {
1397 eui[3] = (dev->dev_id >> 8) & 0xFF;
1398 eui[4] = dev->dev_id & 0xFF;
1399 } else {
1400 eui[3] = 0xFF;
1401 eui[4] = 0xFE;
1402 eui[0] ^= 2;
1403 }
1404 return 0;
1405}
1406
1407static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1408{
1409 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1410 if (dev->addr_len != ARCNET_ALEN)
1411 return -1;
1412 memset(eui, 0, 7);
1413 eui[7] = *(u8*)dev->dev_addr;
1414 return 0;
1415}
1416
1417static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1418{
1419 if (dev->addr_len != INFINIBAND_ALEN)
1420 return -1;
1421 memcpy(eui, dev->dev_addr + 12, 8);
1422 eui[0] |= 2;
1423 return 0;
1424}
1425
1da177e4
LT		 1426static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1427{
1428 switch (dev->type) {
1429 case ARPHRD_ETHER:
1430 case ARPHRD_FDDI:
1431 case ARPHRD_IEEE802_TR:
073a8e0e 1432 return addrconf_ifid_eui48(eui, dev);
1da177e4 1433 case ARPHRD_ARCNET:
073a8e0e 1434 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1435 case ARPHRD_INFINIBAND:
073a8e0e 1436 return addrconf_ifid_infiniband(eui, dev);
1da177e4
LT		 1437 }
1438 return -1;
1439}
1440
1441static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1442{
1443 int err = -1;
1444 struct inet6_ifaddr *ifp;
1445
1446 read_lock_bh(&idev->lock);
1447 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1448 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1449 memcpy(eui, ifp->addr.s6_addr+8, 8);
1450 err = 0;
1451 break;
1452 }
1453 }
1454 read_unlock_bh(&idev->lock);
1455 return err;
1456}
1457
1458#ifdef CONFIG_IPV6_PRIVACY
1459/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1460static int __ipv6_regen_rndid(struct inet6_dev *idev)
1461{
1da177e4 1462regen:
955189ef 1463 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1464 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1465
1466 /*
1467 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1468 * check if generated address is not inappropriate
1469 *
1470 * - Reserved subnet anycast (RFC 2526)
1471 * 11111101 11....11 1xxxxxxx
1472 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1473 * 00-00-5E-FE-xx-xx-xx-xx
1474 * - value 0
1475 * - XXX: already assigned to an address on the device
1476 */
1ab1457c 1477 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1478 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1479 (idev->rndid[7]&0x80))
1480 goto regen;
1481 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1482 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1483 goto regen;
1484 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1485 goto regen;
1486 }
1487
1488 return 0;
1489}
1490
1491static void ipv6_regen_rndid(unsigned long data)
1492{
1493 struct inet6_dev *idev = (struct inet6_dev *) data;
1494 unsigned long expires;
1495
8814c4b5 1496 rcu_read_lock_bh();
1da177e4
LT		 1497 write_lock_bh(&idev->lock);
1498
1499 if (idev->dead)
1500 goto out;
1501
1502 if (__ipv6_regen_rndid(idev) < 0)
1503 goto out;
1ab1457c 1504
1da177e4 1505 expires = jiffies +
1ab1457c 1506 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1507 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1508 if (time_before(expires, jiffies)) {
1509 printk(KERN_WARNING
1510 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1511 idev->dev->name);
1512 goto out;
1513 }
1514
1515 if (!mod_timer(&idev->regen_timer, expires))
1516 in6_dev_hold(idev);
1517
1518out:
1519 write_unlock_bh(&idev->lock);
8814c4b5 1520 rcu_read_unlock_bh();
1da177e4
LT		 1521 in6_dev_put(idev);
1522}
1523
1524static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1525 int ret = 0;
1526
1527 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1528 ret = __ipv6_regen_rndid(idev);
1529 return ret;
1530}
1531#endif
1532
1533/*
1534 * Add prefix route.
1535 */
1536
1537static void
1538addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1539 unsigned long expires, u32 flags)
1da177e4 1540{
86872cb5
TG		 1541 struct fib6_config cfg = {
1542 .fc_table = RT6_TABLE_PREFIX,
1543 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1544 .fc_ifindex = dev->ifindex,
1545 .fc_expires = expires,
1546 .fc_dst_len = plen,
1547 .fc_flags = RTF_UP | flags,
1548 };
1da177e4 1549
86872cb5 1550 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1551
1552 /* Prevent useless cloning on PtP SIT.
1553 This thing is done here expecting that the whole
1554 class of non-broadcast devices need not cloning.
1555 */
0be669bb 1556#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1557 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1558 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1559#endif
1da177e4 1560
86872cb5 1561 ip6_route_add(&cfg);
1da177e4
LT		 1562}
1563
1564/* Create "default" multicast route to the interface */
1565
1566static void addrconf_add_mroute(struct net_device *dev)
1567{
86872cb5
TG		 1568 struct fib6_config cfg = {
1569 .fc_table = RT6_TABLE_LOCAL,
1570 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1571 .fc_ifindex = dev->ifindex,
1572 .fc_dst_len = 8,
1573 .fc_flags = RTF_UP,
1574 };
1575
1576 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1577
1578 ip6_route_add(&cfg);
1da177e4
LT		 1579}
1580
0be669bb 1581#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1582static void sit_route_add(struct net_device *dev)
1583{
86872cb5
TG		 1584 struct fib6_config cfg = {
1585 .fc_table = RT6_TABLE_MAIN,
1586 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1587 .fc_ifindex = dev->ifindex,
1588 .fc_dst_len = 96,
1589 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1590 };
1da177e4
LT		 1591
1592 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1593 ip6_route_add(&cfg);
1da177e4 1594}
0be669bb 1595#endif
1da177e4
LT		 1596
1597static void addrconf_add_lroute(struct net_device *dev)
1598{
1599 struct in6_addr addr;
1600
1601 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1602 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1603}
1604
1605static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1606{
1607 struct inet6_dev *idev;
1608
1609 ASSERT_RTNL();
1610
1611 if ((idev = ipv6_find_idev(dev)) == NULL)
1612 return NULL;
1613
1614 /* Add default multicast route */
1615 addrconf_add_mroute(dev);
1616
1617 /* Add link local route */
1618 addrconf_add_lroute(dev);
1619 return idev;
1620}
1621
1622void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1623{
1624 struct prefix_info *pinfo;
1625 __u32 valid_lft;
1626 __u32 prefered_lft;
1627 int addr_type;
1628 unsigned long rt_expires;
1629 struct inet6_dev *in6_dev;
1630
1631 pinfo = (struct prefix_info *) opt;
1ab1457c 1632
1da177e4
LT		 1633 if (len < sizeof(struct prefix_info)) {
1634 ADBG(("addrconf: prefix option too short\n"));
1635 return;
1636 }
1ab1457c 1637
1da177e4
LT		 1638 /*
1639 * Validation checks ([ADDRCONF], page 19)
1640 */
1641
1642 addr_type = ipv6_addr_type(&pinfo->prefix);
1643
1644 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1645 return;
1646
1647 valid_lft = ntohl(pinfo->valid);
1648 prefered_lft = ntohl(pinfo->prefered);
1649
1650 if (prefered_lft > valid_lft) {
1651 if (net_ratelimit())
1652 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1653 return;
1654 }
1655
1656 in6_dev = in6_dev_get(dev);
1657
1658 if (in6_dev == NULL) {
1659 if (net_ratelimit())
1660 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1661 return;
1662 }
1663
1664 /*
1665 * Two things going on here:
1666 * 1) Add routes for on-link prefixes
1667 * 2) Configure prefixes with the auto flag set
1668 */
1669
1670 /* Avoid arithmetic overflow. Really, we could
1671 save rt_expires in seconds, likely valid_lft,
1672 but it would require division in fib gc, that it
1673 not good.
1674 */
1675 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1676 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1677 else
3dd4bc68
YH		 1678 rt_expires = valid_lft * HZ;
1679
1680 /*
1681 * We convert this (in jiffies) to clock_t later.
1682 * Avoid arithmetic overflow there as well.
1683 * Overflow can happen only if HZ < USER_HZ.
1684 */
1685 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1686 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1687
1688 if (pinfo->onlink) {
1689 struct rt6_info *rt;
1690 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1691
1692 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1693 if (rt->rt6i_flags&RTF_EXPIRES) {
1694 if (valid_lft == 0) {
e0a1ad73 1695 ip6_del_rt(rt);
1da177e4
LT		 1696 rt = NULL;
1697 } else {
3dd4bc68 1698 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1699 }
1700 }
1701 } else if (valid_lft) {
1702 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1703 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1704 }
1705 if (rt)
1706 dst_release(&rt->u.dst);
1707 }
1708
1709 /* Try to figure out our local address for this prefix */
1710
1711 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1712 struct inet6_ifaddr * ifp;
1713 struct in6_addr addr;
1714 int create = 0, update_lft = 0;
1715
1716 if (pinfo->prefix_len == 64) {
1717 memcpy(&addr, &pinfo->prefix, 8);
1718 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1719 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1720 in6_dev_put(in6_dev);
1721 return;
1722 }
1723 goto ok;
1724 }
1725 if (net_ratelimit())
1726 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1727 pinfo->prefix_len);
1728 in6_dev_put(in6_dev);
1729 return;
1730
1731ok:
1732
1733 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1734
1735 if (ifp == NULL && valid_lft) {
1736 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1737 u32 addr_flags = 0;
1738
1739#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1740 if (in6_dev->cnf.optimistic_dad &&
1741 !ipv6_devconf.forwarding)
1742 addr_flags = IFA_F_OPTIMISTIC;
1743#endif
1da177e4
LT		 1744
1745 /* Do not allow to create too much of autoconfigured
1746 * addresses; this would be too easy way to crash kernel.
1747 */
1748 if (!max_addresses ||
1749 ipv6_count_addresses(in6_dev) < max_addresses)
1750 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1751 addr_type&IPV6_ADDR_SCOPE_MASK,
1752 addr_flags);
1da177e4
LT		 1753
1754 if (!ifp || IS_ERR(ifp)) {
1755 in6_dev_put(in6_dev);
1756 return;
1757 }
1758
1759 update_lft = create = 1;
1760 ifp->cstamp = jiffies;
1761 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1762 }
1763
1764 if (ifp) {
1765 int flags;
1766 unsigned long now;
1767#ifdef CONFIG_IPV6_PRIVACY
1768 struct inet6_ifaddr *ift;
1769#endif
1770 u32 stored_lft;
1771
1772 /* update lifetime (RFC2462 5.5.3 e) */
1773 spin_lock(&ifp->lock);
1774 now = jiffies;
1775 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1776 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1777 else
1778 stored_lft = 0;
1779 if (!update_lft && stored_lft) {
1780 if (valid_lft > MIN_VALID_LIFETIME ||
1781 valid_lft > stored_lft)
1782 update_lft = 1;
1783 else if (stored_lft <= MIN_VALID_LIFETIME) {
1784 /* valid_lft <= stored_lft is always true */
1785 /* XXX: IPsec */
1786 update_lft = 0;
1787 } else {
1788 valid_lft = MIN_VALID_LIFETIME;
1789 if (valid_lft < prefered_lft)
1790 prefered_lft = valid_lft;
1791 update_lft = 1;
1792 }
1793 }
1794
1795 if (update_lft) {
1796 ifp->valid_lft = valid_lft;
1797 ifp->prefered_lft = prefered_lft;
1798 ifp->tstamp = now;
1799 flags = ifp->flags;
1800 ifp->flags &= ~IFA_F_DEPRECATED;
1801 spin_unlock(&ifp->lock);
1802
1803 if (!(flags&IFA_F_TENTATIVE))
1804 ipv6_ifa_notify(0, ifp);
1805 } else
1806 spin_unlock(&ifp->lock);
1807
1808#ifdef CONFIG_IPV6_PRIVACY
1809 read_lock_bh(&in6_dev->lock);
1810 /* update all temporary addresses in the list */
1811 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1812 /*
1813 * When adjusting the lifetimes of an existing
1814 * temporary address, only lower the lifetimes.
1815 * Implementations must not increase the
1816 * lifetimes of an existing temporary address
1817 * when processing a Prefix Information Option.
1818 */
1819 spin_lock(&ift->lock);
1820 flags = ift->flags;
1821 if (ift->valid_lft > valid_lft &&
1822 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1823 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1824 if (ift->prefered_lft > prefered_lft &&
1825 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1826 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1827 spin_unlock(&ift->lock);
1828 if (!(flags&IFA_F_TENTATIVE))
1829 ipv6_ifa_notify(0, ift);
1830 }
1831
1832 if (create && in6_dev->cnf.use_tempaddr > 0) {
1833 /*
1834 * When a new public address is created as described in [ADDRCONF],
1835 * also create a new temporary address.
1836 */
1ab1457c 1837 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1838 ipv6_create_tempaddr(ifp, NULL);
1839 } else {
1840 read_unlock_bh(&in6_dev->lock);
1841 }
1842#endif
1843 in6_ifa_put(ifp);
1844 addrconf_verify(0);
1845 }
1846 }
1847 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1848 in6_dev_put(in6_dev);
1849}
1850
1851/*
1852 * Set destination address.
1853 * Special case for SIT interfaces where we create a new "virtual"
1854 * device.
1855 */
1856int addrconf_set_dstaddr(void __user *arg)
1857{
1858 struct in6_ifreq ireq;
1859 struct net_device *dev;
1860 int err = -EINVAL;
1861
1862 rtnl_lock();
1863
1864 err = -EFAULT;
1865 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1866 goto err_exit;
1867
881d966b 1868 dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex);
1da177e4
LT		 1869
1870 err = -ENODEV;
1871 if (dev == NULL)
1872 goto err_exit;
1873
0be669bb 1874#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1875 if (dev->type == ARPHRD_SIT) {
1876 struct ifreq ifr;
1877 mm_segment_t oldfs;
1878 struct ip_tunnel_parm p;
1879
1880 err = -EADDRNOTAVAIL;
1881 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1882 goto err_exit;
1883
1884 memset(&p, 0, sizeof(p));
1885 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1886 p.iph.saddr = 0;
1887 p.iph.version = 4;
1888 p.iph.ihl = 5;
1889 p.iph.protocol = IPPROTO_IPV6;
1890 p.iph.ttl = 64;
1891 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1892
1893 oldfs = get_fs(); set_fs(KERNEL_DS);
1894 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1895 set_fs(oldfs);
1896
1897 if (err == 0) {
1898 err = -ENOBUFS;
881d966b 1899 if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL)
1da177e4
LT		 1900 goto err_exit;
1901 err = dev_open(dev);
1902 }
1903 }
0be669bb 1904#endif
1da177e4
LT		 1905
1906err_exit:
1907 rtnl_unlock();
1908 return err;
1909}
1910
1911/*
1912 * Manual configuration of address on an interface
1913 */
0778769d 1914static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
55ebaef1 1915 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1da177e4
LT		 1916{
1917 struct inet6_ifaddr *ifp;
1918 struct inet6_dev *idev;
1919 struct net_device *dev;
1920 int scope;
46d48046 1921 u32 flags = RTF_EXPIRES;
1da177e4
LT		 1922
1923 ASSERT_RTNL();
1ab1457c 1924
0778769d
NT		 1925 /* check the lifetime */
1926 if (!valid_lft || prefered_lft > valid_lft)
1927 return -EINVAL;
1928
881d966b 1929 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4 1930 return -ENODEV;
1ab1457c 1931
1da177e4
LT		 1932 if ((idev = addrconf_add_dev(dev)) == NULL)
1933 return -ENOBUFS;
1934
1935 scope = ipv6_addr_scope(pfx);
1936
46d48046 1937 if (valid_lft == INFINITY_LIFE_TIME) {
0778769d 1938 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 1939 flags = 0;
1940 } else if (valid_lft >= 0x7FFFFFFF/HZ)
0778769d
NT		 1941 valid_lft = 0x7FFFFFFF/HZ;
1942
1943 if (prefered_lft == 0)
1944 ifa_flags |= IFA_F_DEPRECATED;
1945 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1946 (prefered_lft != INFINITY_LIFE_TIME))
1947 prefered_lft = 0x7FFFFFFF/HZ;
1948
1949 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1950
1da177e4 1951 if (!IS_ERR(ifp)) {
06aebfb7 1952 spin_lock_bh(&ifp->lock);
0778769d
NT		 1953 ifp->valid_lft = valid_lft;
1954 ifp->prefered_lft = prefered_lft;
1955 ifp->tstamp = jiffies;
06aebfb7 1956 spin_unlock_bh(&ifp->lock);
0778769d 1957
46d48046
YH		 1958 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1959 jiffies_to_clock_t(valid_lft * HZ), flags);
95c385b4
NH		 1960 /*
1961 * Note that section 3.1 of RFC 4429 indicates
1962 * that the Optimistic flag should not be set for
1963 * manually configured addresses
1964 */
1da177e4
LT		 1965 addrconf_dad_start(ifp, 0);
1966 in6_ifa_put(ifp);
0778769d 1967 addrconf_verify(0);
1da177e4
LT		 1968 return 0;
1969 }
1970
1971 return PTR_ERR(ifp);
1972}
1973
1974static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1975{
1976 struct inet6_ifaddr *ifp;
1977 struct inet6_dev *idev;
1978 struct net_device *dev;
1ab1457c 1979
881d966b 1980 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4
LT		 1981 return -ENODEV;
1982
1983 if ((idev = __in6_dev_get(dev)) == NULL)
1984 return -ENXIO;
1985
1986 read_lock_bh(&idev->lock);
1987 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1988 if (ifp->prefix_len == plen &&
1989 ipv6_addr_equal(pfx, &ifp->addr)) {
1990 in6_ifa_hold(ifp);
1991 read_unlock_bh(&idev->lock);
1ab1457c 1992
1da177e4
LT		 1993 ipv6_del_addr(ifp);
1994
1995 /* If the last address is deleted administratively,
1996 disable IPv6 on this interface.
1997 */
1998 if (idev->addr_list == NULL)
1999 addrconf_ifdown(idev->dev, 1);
2000 return 0;
2001 }
2002 }
2003 read_unlock_bh(&idev->lock);
2004 return -EADDRNOTAVAIL;
2005}
2006
2007
2008int addrconf_add_ifaddr(void __user *arg)
2009{
2010 struct in6_ifreq ireq;
2011 int err;
1ab1457c 2012
1da177e4
LT		 2013 if (!capable(CAP_NET_ADMIN))
2014 return -EPERM;
1ab1457c 2015
1da177e4
LT		 2016 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2017 return -EFAULT;
2018
2019 rtnl_lock();
0778769d 2020 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
55ebaef1 2021 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2022 rtnl_unlock();
2023 return err;
2024}
2025
2026int addrconf_del_ifaddr(void __user *arg)
2027{
2028 struct in6_ifreq ireq;
2029 int err;
1ab1457c 2030
1da177e4
LT		 2031 if (!capable(CAP_NET_ADMIN))
2032 return -EPERM;
2033
2034 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2035 return -EFAULT;
2036
2037 rtnl_lock();
2038 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2039 rtnl_unlock();
2040 return err;
2041}
2042
0be669bb 2043#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2044static void sit_add_v4_addrs(struct inet6_dev *idev)
2045{
2046 struct inet6_ifaddr * ifp;
2047 struct in6_addr addr;
2048 struct net_device *dev;
2049 int scope;
2050
2051 ASSERT_RTNL();
2052
2053 memset(&addr, 0, sizeof(struct in6_addr));
2054 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2055
2056 if (idev->dev->flags&IFF_POINTOPOINT) {
2057 addr.s6_addr32[0] = htonl(0xfe800000);
2058 scope = IFA_LINK;
2059 } else {
2060 scope = IPV6_ADDR_COMPATv4;
2061 }
2062
2063 if (addr.s6_addr32[3]) {
2064 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2065 if (!IS_ERR(ifp)) {
2066 spin_lock_bh(&ifp->lock);
2067 ifp->flags &= ~IFA_F_TENTATIVE;
2068 spin_unlock_bh(&ifp->lock);
2069 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2070 in6_ifa_put(ifp);
2071 }
2072 return;
2073 }
2074
881d966b 2075 for_each_netdev(&init_net, dev) {
e5ed6399 2076 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2077 if (in_dev && (dev->flags & IFF_UP)) {
2078 struct in_ifaddr * ifa;
2079
2080 int flag = scope;
2081
2082 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2083 int plen;
2084
2085 addr.s6_addr32[3] = ifa->ifa_local;
2086
2087 if (ifa->ifa_scope == RT_SCOPE_LINK)
2088 continue;
2089 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2090 if (idev->dev->flags&IFF_POINTOPOINT)
2091 continue;
2092 flag |= IFA_HOST;
2093 }
2094 if (idev->dev->flags&IFF_POINTOPOINT)
2095 plen = 64;
2096 else
2097 plen = 96;
2098
2099 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2100 IFA_F_PERMANENT);
2101 if (!IS_ERR(ifp)) {
2102 spin_lock_bh(&ifp->lock);
2103 ifp->flags &= ~IFA_F_TENTATIVE;
2104 spin_unlock_bh(&ifp->lock);
2105 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2106 in6_ifa_put(ifp);
2107 }
2108 }
2109 }
1ab1457c 2110 }
1da177e4 2111}
0be669bb 2112#endif
1da177e4
LT		 2113
2114static void init_loopback(struct net_device *dev)
2115{
2116 struct inet6_dev *idev;
2117 struct inet6_ifaddr * ifp;
2118
2119 /* ::1 */
2120
2121 ASSERT_RTNL();
2122
2123 if ((idev = ipv6_find_idev(dev)) == NULL) {
2124 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2125 return;
2126 }
2127
2128 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2129 if (!IS_ERR(ifp)) {
2130 spin_lock_bh(&ifp->lock);
2131 ifp->flags &= ~IFA_F_TENTATIVE;
2132 spin_unlock_bh(&ifp->lock);
2133 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2134 in6_ifa_put(ifp);
2135 }
2136}
2137
2138static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2139{
2140 struct inet6_ifaddr * ifp;
95c385b4
NH		 2141 u32 addr_flags = IFA_F_PERMANENT;
2142
2143#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2144 if (idev->cnf.optimistic_dad &&
2145 !ipv6_devconf.forwarding)
2146 addr_flags |= IFA_F_OPTIMISTIC;
2147#endif
1da177e4 2148
95c385b4
NH		 2149
2150 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2151 if (!IS_ERR(ifp)) {
46d48046 2152 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2153 addrconf_dad_start(ifp, 0);
2154 in6_ifa_put(ifp);
2155 }
2156}
2157
2158static void addrconf_dev_config(struct net_device *dev)
2159{
2160 struct in6_addr addr;
2161 struct inet6_dev * idev;
2162
2163 ASSERT_RTNL();
2164
74235a25
HX		 2165 if ((dev->type != ARPHRD_ETHER) &&
2166 (dev->type != ARPHRD_FDDI) &&
2167 (dev->type != ARPHRD_IEEE802_TR) &&
2168 (dev->type != ARPHRD_ARCNET) &&
2169 (dev->type != ARPHRD_INFINIBAND)) {
2170 /* Alas, we support only Ethernet autoconfiguration. */
2171 return;
2172 }
2173
1da177e4
LT		 2174 idev = addrconf_add_dev(dev);
2175 if (idev == NULL)
2176 return;
2177
2178 memset(&addr, 0, sizeof(struct in6_addr));
2179 addr.s6_addr32[0] = htonl(0xFE800000);
2180
2181 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2182 addrconf_add_linklocal(idev, &addr);
2183}
2184
0be669bb 2185#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2186static void addrconf_sit_config(struct net_device *dev)
2187{
2188 struct inet6_dev *idev;
2189
2190 ASSERT_RTNL();
2191
1ab1457c
YH		 2192 /*
2193 * Configure the tunnel with one of our IPv4
2194 * addresses... we should configure all of
1da177e4
LT		 2195 * our v4 addrs in the tunnel
2196 */
2197
2198 if ((idev = ipv6_find_idev(dev)) == NULL) {
2199 printk(KERN_DEBUG "init sit: add_dev failed\n");
2200 return;
2201 }
2202
2203 sit_add_v4_addrs(idev);
2204
2205 if (dev->flags&IFF_POINTOPOINT) {
2206 addrconf_add_mroute(dev);
2207 addrconf_add_lroute(dev);
2208 } else
2209 sit_route_add(dev);
2210}
0be669bb 2211#endif
1da177e4
LT		 2212
2213static inline int
2214ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2215{
2216 struct in6_addr lladdr;
2217
95c385b4 2218 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2219 addrconf_add_linklocal(idev, &lladdr);
2220 return 0;
2221 }
2222 return -1;
2223}
2224
2225static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2226{
2227 struct net_device *link_dev;
2228
2229 /* first try to inherit the link-local address from the link device */
2230 if (idev->dev->iflink &&
881d966b 2231 (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) {
1da177e4
LT		 2232 if (!ipv6_inherit_linklocal(idev, link_dev))
2233 return;
2234 }
2235 /* then try to inherit it from any device */
881d966b 2236 for_each_netdev(&init_net, link_dev) {
1da177e4
LT		 2237 if (!ipv6_inherit_linklocal(idev, link_dev))
2238 return;
2239 }
2240 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2241}
2242
2243/*
2244 * Autoconfigure tunnel with a link-local address so routing protocols,
2245 * DHCPv6, MLD etc. can be run over the virtual link
2246 */
2247
2248static void addrconf_ip6_tnl_config(struct net_device *dev)
2249{
2250 struct inet6_dev *idev;
2251
2252 ASSERT_RTNL();
2253
2254 if ((idev = addrconf_add_dev(dev)) == NULL) {
2255 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2256 return;
2257 }
2258 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2259}
2260
1ab1457c 2261static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2262 void * data)
2263{
2264 struct net_device *dev = (struct net_device *) data;
74235a25 2265 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2266 int run_pending = 0;
b217d616 2267 int err;
1da177e4 2268
e9dc8653
EB		 2269 if (dev->nd_net != &init_net)
2270 return NOTIFY_DONE;
2271
1da177e4 2272 switch(event) {
45ba9dd2 2273 case NETDEV_REGISTER:
74235a25 2274 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2275 idev = ipv6_add_dev(dev);
2276 if (!idev)
b217d616 2277 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2278 }
2279 break;
1da177e4 2280 case NETDEV_UP:
3c21edbd 2281 case NETDEV_CHANGE:
c2edacf8
JV		 2282 if (dev->flags & IFF_SLAVE)
2283 break;
2284
3c21edbd
YH		 2285 if (event == NETDEV_UP) {
2286 if (!netif_carrier_ok(dev)) {
2287 /* device is not ready yet. */
2288 printk(KERN_INFO
2289 "ADDRCONF(NETDEV_UP): %s: "
2290 "link is not ready\n",
2291 dev->name);
2292 break;
2293 }
99081049
KS		 2294
2295 if (idev)
2296 idev->if_flags |= IF_READY;
3c21edbd
YH		 2297 } else {
2298 if (!netif_carrier_ok(dev)) {
2299 /* device is still not ready. */
2300 break;
2301 }
2302
2303 if (idev) {
2304 if (idev->if_flags & IF_READY) {
2305 /* device is already configured. */
2306 break;
2307 }
2308 idev->if_flags |= IF_READY;
2309 }
2310
2311 printk(KERN_INFO
2312 "ADDRCONF(NETDEV_CHANGE): %s: "
2313 "link becomes ready\n",
2314 dev->name);
2315
c5e33bdd 2316 run_pending = 1;
3c21edbd
YH		 2317 }
2318
1da177e4 2319 switch(dev->type) {
0be669bb 2320#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2321 case ARPHRD_SIT:
2322 addrconf_sit_config(dev);
2323 break;
0be669bb 2324#endif
1da177e4
LT		 2325 case ARPHRD_TUNNEL6:
2326 addrconf_ip6_tnl_config(dev);
2327 break;
2328 case ARPHRD_LOOPBACK:
2329 init_loopback(dev);
2330 break;
2331
2332 default:
2333 addrconf_dev_config(dev);
2334 break;
3ff50b79 2335 }
1da177e4 2336 if (idev) {
c5e33bdd
YH		 2337 if (run_pending)
2338 addrconf_dad_run(idev);
2339
1da177e4
LT		 2340 /* If the MTU changed during the interface down, when the
2341 interface up, the changed MTU must be reflected in the
2342 idev as well as routers.
2343 */
2344 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2345 rt6_mtu_change(dev, dev->mtu);
2346 idev->cnf.mtu6 = dev->mtu;
2347 }
2348 idev->tstamp = jiffies;
2349 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2350 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2351 stop IPv6 on this interface.
2352 */
2353 if (dev->mtu < IPV6_MIN_MTU)
2354 addrconf_ifdown(dev, event != NETDEV_DOWN);
2355 }
2356 break;
2357
2358 case NETDEV_CHANGEMTU:
2359 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2360 rt6_mtu_change(dev, dev->mtu);
2361 idev->cnf.mtu6 = dev->mtu;
2362 break;
2363 }
2364
2365 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2366
2367 case NETDEV_DOWN:
2368 case NETDEV_UNREGISTER:
2369 /*
2370 * Remove all addresses from this interface.
2371 */
2372 addrconf_ifdown(dev, event != NETDEV_DOWN);
2373 break;
3c21edbd 2374
1da177e4 2375 case NETDEV_CHANGENAME:
1da177e4 2376 if (idev) {
5632c515
SH		 2377 snmp6_unregister_dev(idev);
2378#ifdef CONFIG_SYSCTL
1da177e4
LT		 2379 addrconf_sysctl_unregister(&idev->cnf);
2380 neigh_sysctl_unregister(idev->nd_parms);
2381 neigh_sysctl_register(dev, idev->nd_parms,
2382 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2383 &ndisc_ifinfo_sysctl_change,
2384 NULL);
2385 addrconf_sysctl_register(idev, &idev->cnf);
1da177e4 2386#endif
b217d616
HX		 2387 err = snmp6_register_dev(idev);
2388 if (err)
2389 return notifier_from_errno(err);
5632c515 2390 }
1da177e4 2391 break;
3ff50b79 2392 }
1da177e4
LT		 2393
2394 return NOTIFY_OK;
2395}
2396
2397/*
2398 * addrconf module should be notified of a device going up
2399 */
2400static struct notifier_block ipv6_dev_notf = {
2401 .notifier_call = addrconf_notify,
2402 .priority = 0
2403};
2404
2405static int addrconf_ifdown(struct net_device *dev, int how)
2406{
2407 struct inet6_dev *idev;
2408 struct inet6_ifaddr *ifa, **bifa;
2409 int i;
2410
2411 ASSERT_RTNL();
2412
de3cb747 2413 if (dev == loopback_dev && how == 1)
1da177e4
LT		 2414 how = 0;
2415
2416 rt6_ifdown(dev);
2417 neigh_ifdown(&nd_tbl, dev);
2418
2419 idev = __in6_dev_get(dev);
2420 if (idev == NULL)
2421 return -ENODEV;
2422
2423 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2424 Do not dev_put!
1da177e4
LT		 2425 */
2426 if (how == 1) {
1da177e4 2427 idev->dead = 1;
8814c4b5
YH		 2428
2429 /* protected by rtnl_lock */
2430 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2431
2432 /* Step 1.5: remove snmp6 entry */
2433 snmp6_unregister_dev(idev);
2434
2435 }
2436
2437 /* Step 2: clear hash table */
2438 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2439 bifa = &inet6_addr_lst[i];
2440
2441 write_lock_bh(&addrconf_hash_lock);
2442 while ((ifa = *bifa) != NULL) {
2443 if (ifa->idev == idev) {
2444 *bifa = ifa->lst_next;
2445 ifa->lst_next = NULL;
2446 addrconf_del_timer(ifa);
2447 in6_ifa_put(ifa);
2448 continue;
2449 }
2450 bifa = &ifa->lst_next;
2451 }
2452 write_unlock_bh(&addrconf_hash_lock);
2453 }
2454
2455 write_lock_bh(&idev->lock);
2456
2457 /* Step 3: clear flags for stateless addrconf */
2458 if (how != 1)
3c21edbd 2459 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2460
2461 /* Step 4: clear address list */
2462#ifdef CONFIG_IPV6_PRIVACY
2463 if (how == 1 && del_timer(&idev->regen_timer))
2464 in6_dev_put(idev);
2465
2466 /* clear tempaddr list */
2467 while ((ifa = idev->tempaddr_list) != NULL) {
2468 idev->tempaddr_list = ifa->tmp_next;
2469 ifa->tmp_next = NULL;
2470 ifa->dead = 1;
2471 write_unlock_bh(&idev->lock);
2472 spin_lock_bh(&ifa->lock);
2473
2474 if (ifa->ifpub) {
2475 in6_ifa_put(ifa->ifpub);
2476 ifa->ifpub = NULL;
2477 }
2478 spin_unlock_bh(&ifa->lock);
2479 in6_ifa_put(ifa);
2480 write_lock_bh(&idev->lock);
2481 }
2482#endif
2483 while ((ifa = idev->addr_list) != NULL) {
2484 idev->addr_list = ifa->if_next;
2485 ifa->if_next = NULL;
2486 ifa->dead = 1;
2487 addrconf_del_timer(ifa);
2488 write_unlock_bh(&idev->lock);
2489
2490 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2491 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2492 in6_ifa_put(ifa);
2493
2494 write_lock_bh(&idev->lock);
2495 }
2496 write_unlock_bh(&idev->lock);
2497
2498 /* Step 5: Discard multicast list */
2499
2500 if (how == 1)
2501 ipv6_mc_destroy_dev(idev);
2502 else
2503 ipv6_mc_down(idev);
2504
1da177e4 2505 idev->tstamp = jiffies;
1ab1457c 2506
1da177e4
LT		 2507 /* Shot the device (if unregistered) */
2508
2509 if (how == 1) {
2510#ifdef CONFIG_SYSCTL
2511 addrconf_sysctl_unregister(&idev->cnf);
2512 neigh_sysctl_unregister(idev->nd_parms);
2513#endif
2514 neigh_parms_release(&nd_tbl, idev->nd_parms);
2515 neigh_ifdown(&nd_tbl, dev);
2516 in6_dev_put(idev);
2517 }
2518 return 0;
2519}
2520
2521static void addrconf_rs_timer(unsigned long data)
2522{
2523 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2524
2525 if (ifp->idev->cnf.forwarding)
2526 goto out;
2527
2528 if (ifp->idev->if_flags & IF_RA_RCVD) {
2529 /*
2530 * Announcement received after solicitation
2531 * was sent
2532 */
2533 goto out;
2534 }
2535
2536 spin_lock(&ifp->lock);
2537 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2538 struct in6_addr all_routers;
2539
2540 /* The wait after the last probe can be shorter */
2541 addrconf_mod_timer(ifp, AC_RS,
2542 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2543 ifp->idev->cnf.rtr_solicit_delay :
2544 ifp->idev->cnf.rtr_solicit_interval);
2545 spin_unlock(&ifp->lock);
2546
2547 ipv6_addr_all_routers(&all_routers);
2548
2549 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2550 } else {
2551 spin_unlock(&ifp->lock);
2552 /*
2553 * Note: we do not support deprecated "all on-link"
2554 * assumption any longer.
2555 */
2556 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2557 ifp->idev->dev->name);
2558 }
2559
2560out:
2561 in6_ifa_put(ifp);
2562}
2563
2564/*
2565 * Duplicate Address Detection
2566 */
3c21edbd
YH		 2567static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2568{
2569 unsigned long rand_num;
2570 struct inet6_dev *idev = ifp->idev;
2571
95c385b4
NH		 2572 if (ifp->flags & IFA_F_OPTIMISTIC)
2573 rand_num = 0;
2574 else
2575 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2576
3c21edbd
YH		 2577 ifp->probes = idev->cnf.dad_transmits;
2578 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2579}
2580
e431b8c0 2581static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2582{
2583 struct inet6_dev *idev = ifp->idev;
2584 struct net_device *dev = idev->dev;
1da177e4
LT		 2585
2586 addrconf_join_solict(dev, &ifp->addr);
2587
1da177e4 2588 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2589
2590 read_lock_bh(&idev->lock);
2591 if (ifp->dead)
2592 goto out;
2593 spin_lock_bh(&ifp->lock);
2594
2595 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
55ebaef1
NT		 2596 !(ifp->flags&IFA_F_TENTATIVE) ||
2597 ifp->flags & IFA_F_NODAD) {
95c385b4 2598 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2599 spin_unlock_bh(&ifp->lock);
2600 read_unlock_bh(&idev->lock);
2601
2602 addrconf_dad_completed(ifp);
2603 return;
2604 }
2605
6732bade 2606 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2607 spin_unlock_bh(&ifp->lock);
6732bade 2608 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2609 /*
2610 * If the defice is not ready:
2611 * - keep it tentative if it is a permanent address.
2612 * - otherwise, kill it.
2613 */
2614 in6_ifa_hold(ifp);
2615 addrconf_dad_stop(ifp);
6732bade 2616 return;
3c21edbd 2617 }
95c385b4
NH		 2618
2619 /*
2620 * Optimistic nodes can start receiving
2621 * Frames right away
2622 */
2623 if(ifp->flags & IFA_F_OPTIMISTIC)
2624 ip6_ins_rt(ifp->rt);
2625
6732bade
YH		 2626 addrconf_dad_kick(ifp);
2627 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2628out:
2629 read_unlock_bh(&idev->lock);
2630}
2631
2632static void addrconf_dad_timer(unsigned long data)
2633{
2634 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2635 struct inet6_dev *idev = ifp->idev;
2636 struct in6_addr unspec;
2637 struct in6_addr mcaddr;
2638
2639 read_lock_bh(&idev->lock);
2640 if (idev->dead) {
2641 read_unlock_bh(&idev->lock);
2642 goto out;
2643 }
2644 spin_lock_bh(&ifp->lock);
2645 if (ifp->probes == 0) {
2646 /*
2647 * DAD was successful
2648 */
2649
95c385b4 2650 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2651 spin_unlock_bh(&ifp->lock);
2652 read_unlock_bh(&idev->lock);
2653
2654 addrconf_dad_completed(ifp);
2655
2656 goto out;
2657 }
2658
2659 ifp->probes--;
2660 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2661 spin_unlock_bh(&ifp->lock);
2662 read_unlock_bh(&idev->lock);
2663
2664 /* send a neighbour solicitation for our addr */
2665 memset(&unspec, 0, sizeof(unspec));
2666 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2667 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2668out:
2669 in6_ifa_put(ifp);
2670}
2671
2672static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2673{
2674 struct net_device * dev = ifp->idev->dev;
2675
2676 /*
2677 * Configure the address for reception. Now it is valid.
2678 */
2679
2680 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2681
2682 /* If added prefix is link local and forwarding is off,
2683 start sending router solicitations.
2684 */
2685
2686 if (ifp->idev->cnf.forwarding == 0 &&
2687 ifp->idev->cnf.rtr_solicits > 0 &&
2688 (dev->flags&IFF_LOOPBACK) == 0 &&
2689 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2690 struct in6_addr all_routers;
2691
2692 ipv6_addr_all_routers(&all_routers);
2693
2694 /*
2695 * If a host as already performed a random delay
2696 * [...] as part of DAD [...] there is no need
2697 * to delay again before sending the first RS
2698 */
2699 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2700
2701 spin_lock_bh(&ifp->lock);
2702 ifp->probes = 1;
2703 ifp->idev->if_flags |= IF_RS_SENT;
2704 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2705 spin_unlock_bh(&ifp->lock);
2706 }
2707}
2708
c5e33bdd
YH		 2709static void addrconf_dad_run(struct inet6_dev *idev) {
2710 struct inet6_ifaddr *ifp;
2711
2712 read_lock_bh(&idev->lock);
2713 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2714 spin_lock_bh(&ifp->lock);
2715 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2716 spin_unlock_bh(&ifp->lock);
2717 continue;
2718 }
2719 spin_unlock_bh(&ifp->lock);
2720 addrconf_dad_kick(ifp);
2721 }
2722 read_unlock_bh(&idev->lock);
2723}
2724
1da177e4
LT		 2725#ifdef CONFIG_PROC_FS
2726struct if6_iter_state {
2727 int bucket;
2728};
2729
2730static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2731{
2732 struct inet6_ifaddr *ifa = NULL;
2733 struct if6_iter_state *state = seq->private;
2734
2735 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2736 ifa = inet6_addr_lst[state->bucket];
2737 if (ifa)
2738 break;
2739 }
2740 return ifa;
2741}
2742
2743static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2744{
2745 struct if6_iter_state *state = seq->private;
2746
2747 ifa = ifa->lst_next;
2748try_again:
2749 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2750 ifa = inet6_addr_lst[state->bucket];
2751 goto try_again;
2752 }
2753 return ifa;
2754}
2755
2756static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2757{
2758 struct inet6_ifaddr *ifa = if6_get_first(seq);
2759
2760 if (ifa)
2761 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2762 --pos;
2763 return pos ? NULL : ifa;
2764}
2765
2766static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2767{
2768 read_lock_bh(&addrconf_hash_lock);
2769 return if6_get_idx(seq, *pos);
2770}
2771
2772static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2773{
2774 struct inet6_ifaddr *ifa;
2775
2776 ifa = if6_get_next(seq, v);
2777 ++*pos;
2778 return ifa;
2779}
2780
2781static void if6_seq_stop(struct seq_file *seq, void *v)
2782{
2783 read_unlock_bh(&addrconf_hash_lock);
2784}
2785
2786static int if6_seq_show(struct seq_file *seq, void *v)
2787{
2788 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2789 seq_printf(seq,
9343e79a 2790 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2791 NIP6(ifp->addr),
2792 ifp->idev->dev->ifindex,
2793 ifp->prefix_len,
2794 ifp->scope,
2795 ifp->flags,
2796 ifp->idev->dev->name);
2797 return 0;
2798}
2799
56b3d975 2800static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2801 .start = if6_seq_start,
2802 .next = if6_seq_next,
2803 .show = if6_seq_show,
2804 .stop = if6_seq_stop,
2805};
2806
2807static int if6_seq_open(struct inode *inode, struct file *file)
2808{
2809 struct seq_file *seq;
2810 int rc = -ENOMEM;
322f74a4 2811 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
1da177e4
LT		 2812
2813 if (!s)
2814 goto out;
1da177e4
LT		 2815
2816 rc = seq_open(file, &if6_seq_ops);
2817 if (rc)
2818 goto out_kfree;
2819
2820 seq = file->private_data;
2821 seq->private = s;
2822out:
2823 return rc;
2824out_kfree:
2825 kfree(s);
2826 goto out;
2827}
2828
9a32144e 2829static const struct file_operations if6_fops = {
1da177e4
LT		 2830 .owner = THIS_MODULE,
2831 .open = if6_seq_open,
2832 .read = seq_read,
2833 .llseek = seq_lseek,
2834 .release = seq_release_private,
2835};
2836
2837int __init if6_proc_init(void)
2838{
457c4cbc 2839 if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2840 return -ENOMEM;
2841 return 0;
2842}
2843
2844void if6_proc_exit(void)
2845{
457c4cbc 2846 proc_net_remove(&init_net, "if_inet6");
1da177e4
LT		 2847}
2848#endif /* CONFIG_PROC_FS */
2849
59fbb3a6 2850#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 2851/* Check if address is a home address configured on any interface. */
2852int ipv6_chk_home_addr(struct in6_addr *addr)
2853{
2854 int ret = 0;
2855 struct inet6_ifaddr * ifp;
2856 u8 hash = ipv6_addr_hash(addr);
2857 read_lock_bh(&addrconf_hash_lock);
2858 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2859 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2860 (ifp->flags & IFA_F_HOMEADDRESS)) {
2861 ret = 1;
2862 break;
2863 }
2864 }
2865 read_unlock_bh(&addrconf_hash_lock);
2866 return ret;
2867}
2868#endif
2869
1da177e4
LT		 2870/*
2871 * Periodic address status verification
2872 */
2873
2874static void addrconf_verify(unsigned long foo)
2875{
2876 struct inet6_ifaddr *ifp;
2877 unsigned long now, next;
2878 int i;
2879
2880 spin_lock_bh(&addrconf_verify_lock);
2881 now = jiffies;
2882 next = now + ADDR_CHECK_FREQUENCY;
2883
2884 del_timer(&addr_chk_timer);
2885
2886 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2887
2888restart:
5d5780df 2889 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2890 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2891 unsigned long age;
2892#ifdef CONFIG_IPV6_PRIVACY
2893 unsigned long regen_advance;
2894#endif
2895
2896 if (ifp->flags & IFA_F_PERMANENT)
2897 continue;
2898
2899 spin_lock(&ifp->lock);
2900 age = (now - ifp->tstamp) / HZ;
2901
2902#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 2903 regen_advance = ifp->idev->cnf.regen_max_retry *
2904 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 2905 ifp->idev->nd_parms->retrans_time / HZ;
2906#endif
2907
8f27ebb9
YH		 2908 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2909 age >= ifp->valid_lft) {
1da177e4
LT		 2910 spin_unlock(&ifp->lock);
2911 in6_ifa_hold(ifp);
5d5780df 2912 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2913 ipv6_del_addr(ifp);
2914 goto restart;
8f27ebb9
YH		 2915 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2916 spin_unlock(&ifp->lock);
2917 continue;
1da177e4
LT		 2918 } else if (age >= ifp->prefered_lft) {
2919 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2920 int deprecate = 0;
2921
2922 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2923 deprecate = 1;
2924 ifp->flags |= IFA_F_DEPRECATED;
2925 }
2926
2927 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2928 next = ifp->tstamp + ifp->valid_lft * HZ;
2929
2930 spin_unlock(&ifp->lock);
2931
2932 if (deprecate) {
2933 in6_ifa_hold(ifp);
5d5780df 2934 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2935
2936 ipv6_ifa_notify(0, ifp);
2937 in6_ifa_put(ifp);
2938 goto restart;
2939 }
2940#ifdef CONFIG_IPV6_PRIVACY
2941 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2942 !(ifp->flags&IFA_F_TENTATIVE)) {
2943 if (age >= ifp->prefered_lft - regen_advance) {
2944 struct inet6_ifaddr *ifpub = ifp->ifpub;
2945 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2946 next = ifp->tstamp + ifp->prefered_lft * HZ;
2947 if (!ifp->regen_count && ifpub) {
2948 ifp->regen_count++;
2949 in6_ifa_hold(ifp);
2950 in6_ifa_hold(ifpub);
2951 spin_unlock(&ifp->lock);
5d5780df 2952 read_unlock(&addrconf_hash_lock);
291d809b
HY		 2953 spin_lock(&ifpub->lock);
2954 ifpub->regen_count = 0;
2955 spin_unlock(&ifpub->lock);
1da177e4
LT		 2956 ipv6_create_tempaddr(ifpub, ifp);
2957 in6_ifa_put(ifpub);
2958 in6_ifa_put(ifp);
2959 goto restart;
2960 }
2961 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2962 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2963 spin_unlock(&ifp->lock);
2964#endif
2965 } else {
2966 /* ifp->prefered_lft <= ifp->valid_lft */
2967 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2968 next = ifp->tstamp + ifp->prefered_lft * HZ;
2969 spin_unlock(&ifp->lock);
2970 }
2971 }
5d5780df 2972 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2973 }
2974
2975 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2976 add_timer(&addr_chk_timer);
2977 spin_unlock_bh(&addrconf_verify_lock);
2978}
2979
461d8837
TG		 2980static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2981{
2982 struct in6_addr *pfx = NULL;
2983
2984 if (addr)
2985 pfx = nla_data(addr);
2986
2987 if (local) {
2988 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2989 pfx = NULL;
2990 else
2991 pfx = nla_data(local);
2992 }
2993
2994 return pfx;
2995}
2996
ef7c79ed 2997static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 2998 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2999 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3000 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3001};
3002
1da177e4
LT		 3003static int
3004inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3005{
b933f716
TG		 3006 struct ifaddrmsg *ifm;
3007 struct nlattr *tb[IFA_MAX+1];
1da177e4 3008 struct in6_addr *pfx;
b933f716 3009 int err;
1da177e4 3010
b933f716
TG		 3011 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3012 if (err < 0)
3013 return err;
3014
3015 ifm = nlmsg_data(nlh);
3016 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3017 if (pfx == NULL)
3018 return -EINVAL;
3019
3020 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3021}
3022
55ebaef1
NT		 3023static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3024 u32 prefered_lft, u32 valid_lft)
081bba5b 3025{
46d48046
YH		 3026 u32 flags = RTF_EXPIRES;
3027
081bba5b
NT		 3028 if (!valid_lft || (prefered_lft > valid_lft))
3029 return -EINVAL;
3030
46d48046 3031 if (valid_lft == INFINITY_LIFE_TIME) {
55ebaef1 3032 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 3033 flags = 0;
3034 } else if (valid_lft >= 0x7FFFFFFF/HZ)
081bba5b
NT		 3035 valid_lft = 0x7FFFFFFF/HZ;
3036
3037 if (prefered_lft == 0)
55ebaef1 3038 ifa_flags |= IFA_F_DEPRECATED;
081bba5b
NT		 3039 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3040 (prefered_lft != INFINITY_LIFE_TIME))
3041 prefered_lft = 0x7FFFFFFF/HZ;
3042
3043 spin_lock_bh(&ifp->lock);
3b9f9a1c 3044 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3045 ifp->tstamp = jiffies;
3046 ifp->valid_lft = valid_lft;
3047 ifp->prefered_lft = prefered_lft;
3048
3049 spin_unlock_bh(&ifp->lock);
3050 if (!(ifp->flags&IFA_F_TENTATIVE))
3051 ipv6_ifa_notify(0, ifp);
081bba5b 3052
46d48046
YH		 3053 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3054 jiffies_to_clock_t(valid_lft * HZ), flags);
081bba5b
NT		 3055 addrconf_verify(0);
3056
3057 return 0;
3058}
3059
1da177e4
LT		 3060static int
3061inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3062{
461d8837
TG		 3063 struct ifaddrmsg *ifm;
3064 struct nlattr *tb[IFA_MAX+1];
1da177e4 3065 struct in6_addr *pfx;
7198f8ce
TG		 3066 struct inet6_ifaddr *ifa;
3067 struct net_device *dev;
55ebaef1
NT		 3068 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3069 u8 ifa_flags;
461d8837 3070 int err;
1da177e4 3071
461d8837
TG		 3072 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3073 if (err < 0)
3074 return err;
3075
3076 ifm = nlmsg_data(nlh);
3077 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3078 if (pfx == NULL)
3079 return -EINVAL;
3080
461d8837 3081 if (tb[IFA_CACHEINFO]) {
0778769d 3082 struct ifa_cacheinfo *ci;
461d8837
TG		 3083
3084 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3085 valid_lft = ci->ifa_valid;
461d8837
TG		 3086 preferred_lft = ci->ifa_prefered;
3087 } else {
3088 preferred_lft = INFINITY_LIFE_TIME;
3089 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3090 }
3091
881d966b 3092 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
7198f8ce
TG		 3093 if (dev == NULL)
3094 return -ENODEV;
3095
55ebaef1 3096 /* We ignore other flags so far. */
3b9f9a1c 3097 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3098
7198f8ce
TG		 3099 ifa = ipv6_get_ifaddr(pfx, dev, 1);
3100 if (ifa == NULL) {
3101 /*
3102 * It would be best to check for !NLM_F_CREATE here but
3103 * userspace alreay relies on not having to provide this.
3104 */
3105 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
55ebaef1 3106 ifa_flags, preferred_lft, valid_lft);
081bba5b
NT		 3107 }
3108
7198f8ce
TG		 3109 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3110 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3111 err = -EEXIST;
3112 else
55ebaef1 3113 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3114
3115 in6_ifa_put(ifa);
3116
3117 return err;
1da177e4
LT		 3118}
3119
101bb229
TG		 3120static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3121 u8 scope, int ifindex)
3122{
3123 struct ifaddrmsg *ifm;
3124
3125 ifm = nlmsg_data(nlh);
3126 ifm->ifa_family = AF_INET6;
3127 ifm->ifa_prefixlen = prefixlen;
3128 ifm->ifa_flags = flags;
3129 ifm->ifa_scope = scope;
3130 ifm->ifa_index = ifindex;
3131}
3132
85486af0
TG		 3133static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3134 unsigned long tstamp, u32 preferred, u32 valid)
3135{
3136 struct ifa_cacheinfo ci;
3137
3138 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3139 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3140 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3141 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3142 ci.ifa_prefered = preferred;
3143 ci.ifa_valid = valid;
3144
3145 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3146}
3147
101bb229
TG		 3148static inline int rt_scope(int ifa_scope)
3149{
3150 if (ifa_scope & IFA_HOST)
3151 return RT_SCOPE_HOST;
3152 else if (ifa_scope & IFA_LINK)
3153 return RT_SCOPE_LINK;
3154 else if (ifa_scope & IFA_SITE)
3155 return RT_SCOPE_SITE;
3156 else
3157 return RT_SCOPE_UNIVERSE;
3158}
3159
0ab6803b
TG		 3160static inline int inet6_ifaddr_msgsize(void)
3161{
339bf98f
TG		 3162 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3163 + nla_total_size(16) /* IFA_ADDRESS */
3164 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3165}
c5396a31 3166
1da177e4 3167static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3168 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3169{
1da177e4 3170 struct nlmsghdr *nlh;
85486af0 3171 u32 preferred, valid;
1da177e4 3172
0ab6803b
TG		 3173 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3174 if (nlh == NULL)
26932566 3175 return -EMSGSIZE;
0ab6803b 3176
101bb229
TG		 3177 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3178 ifa->idev->dev->ifindex);
3179
1da177e4 3180 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3181 preferred = ifa->prefered_lft;
3182 valid = ifa->valid_lft;
3183 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3184 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3185 preferred -= tval;
3186 if (valid != INFINITY_LIFE_TIME)
3187 valid -= tval;
1da177e4
LT		 3188 }
3189 } else {
85486af0
TG		 3190 preferred = INFINITY_LIFE_TIME;
3191 valid = INFINITY_LIFE_TIME;
3192 }
3193
0ab6803b 3194 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3195 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3196 nlmsg_cancel(skb, nlh);
3197 return -EMSGSIZE;
3198 }
1da177e4 3199
0ab6803b 3200 return nlmsg_end(skb, nlh);
1da177e4
LT		 3201}
3202
3203static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3204 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3205{
1da177e4 3206 struct nlmsghdr *nlh;
101bb229
TG		 3207 u8 scope = RT_SCOPE_UNIVERSE;
3208 int ifindex = ifmca->idev->dev->ifindex;
3209
3210 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3211 scope = RT_SCOPE_SITE;
1da177e4 3212
0ab6803b
TG		 3213 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3214 if (nlh == NULL)
26932566 3215 return -EMSGSIZE;
85486af0 3216
0ab6803b
TG		 3217 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3218 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3219 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3220 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3221 nlmsg_cancel(skb, nlh);
3222 return -EMSGSIZE;
3223 }
85486af0 3224
0ab6803b 3225 return nlmsg_end(skb, nlh);
1da177e4
LT		 3226}
3227
3228static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3229 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3230{
1da177e4 3231 struct nlmsghdr *nlh;
101bb229
TG		 3232 u8 scope = RT_SCOPE_UNIVERSE;
3233 int ifindex = ifaca->aca_idev->dev->ifindex;
3234
3235 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3236 scope = RT_SCOPE_SITE;
1da177e4 3237
0ab6803b
TG		 3238 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3239 if (nlh == NULL)
26932566 3240 return -EMSGSIZE;
85486af0 3241
0ab6803b
TG		 3242 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3243 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3244 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3245 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3246 nlmsg_cancel(skb, nlh);
3247 return -EMSGSIZE;
3248 }
1da177e4 3249
0ab6803b 3250 return nlmsg_end(skb, nlh);
1da177e4
LT		 3251}
3252
3253enum addr_type_t
3254{
3255 UNICAST_ADDR,
3256 MULTICAST_ADDR,
3257 ANYCAST_ADDR,
3258};
3259
3260static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3261 enum addr_type_t type)
3262{
3263 int idx, ip_idx;
3264 int s_idx, s_ip_idx;
3265 int err = 1;
3266 struct net_device *dev;
3267 struct inet6_dev *idev = NULL;
3268 struct inet6_ifaddr *ifa;
3269 struct ifmcaddr6 *ifmca;
3270 struct ifacaddr6 *ifaca;
3271
3272 s_idx = cb->args[0];
3273 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3274
7562f876 3275 idx = 0;
881d966b 3276 for_each_netdev(&init_net, dev) {
1da177e4 3277 if (idx < s_idx)
7562f876 3278 goto cont;
1da177e4
LT		 3279 if (idx > s_idx)
3280 s_ip_idx = 0;
3281 ip_idx = 0;
3282 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3283 goto cont;
1da177e4
LT		 3284 read_lock_bh(&idev->lock);
3285 switch (type) {
3286 case UNICAST_ADDR:
ae9cda5d 3287 /* unicast address incl. temp addr */
1da177e4
LT		 3288 for (ifa = idev->addr_list; ifa;
3289 ifa = ifa->if_next, ip_idx++) {
3290 if (ip_idx < s_ip_idx)
3291 continue;
1ab1457c
YH		 3292 if ((err = inet6_fill_ifaddr(skb, ifa,
3293 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3294 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3295 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3296 goto done;
3297 }
1da177e4
LT		 3298 break;
3299 case MULTICAST_ADDR:
3300 /* multicast address */
1ab1457c 3301 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3302 ifmca = ifmca->next, ip_idx++) {
3303 if (ip_idx < s_ip_idx)
3304 continue;
1ab1457c
YH		 3305 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3306 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3307 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3308 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3309 goto done;
3310 }
3311 break;
3312 case ANYCAST_ADDR:
3313 /* anycast address */
3314 for (ifaca = idev->ac_list; ifaca;
3315 ifaca = ifaca->aca_next, ip_idx++) {
3316 if (ip_idx < s_ip_idx)
3317 continue;
1ab1457c
YH		 3318 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3319 NETLINK_CB(cb->skb).pid,
b6544c0b 3320 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
1ab1457c 3321 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3322 goto done;
3323 }
3324 break;
3325 default:
3326 break;
3327 }
3328 read_unlock_bh(&idev->lock);
3329 in6_dev_put(idev);
7562f876
PE		 3330cont:
3331 idx++;
1da177e4
LT		 3332 }
3333done:
3334 if (err <= 0) {
3335 read_unlock_bh(&idev->lock);
3336 in6_dev_put(idev);
3337 }
1da177e4
LT		 3338 cb->args[0] = idx;
3339 cb->args[1] = ip_idx;
3340 return skb->len;
3341}
3342
3343static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3344{
3345 enum addr_type_t type = UNICAST_ADDR;
3346 return inet6_dump_addr(skb, cb, type);
3347}
3348
3349static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3350{
3351 enum addr_type_t type = MULTICAST_ADDR;
3352 return inet6_dump_addr(skb, cb, type);
3353}
3354
3355
3356static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3357{
3358 enum addr_type_t type = ANYCAST_ADDR;
3359 return inet6_dump_addr(skb, cb, type);
3360}
3361
1b29fc2c
TG		 3362static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3363 void *arg)
6c223828 3364{
1b29fc2c
TG		 3365 struct ifaddrmsg *ifm;
3366 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3367 struct in6_addr *addr = NULL;
3368 struct net_device *dev = NULL;
3369 struct inet6_ifaddr *ifa;
3370 struct sk_buff *skb;
6c223828
NT		 3371 int err;
3372
1b29fc2c
TG		 3373 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3374 if (err < 0)
3375 goto errout;
3376
3377 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3378 if (addr == NULL) {
3379 err = -EINVAL;
3380 goto errout;
6c223828 3381 }
6c223828 3382
1b29fc2c 3383 ifm = nlmsg_data(nlh);
6c223828 3384 if (ifm->ifa_index)
881d966b 3385 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
6c223828 3386
1b29fc2c
TG		 3387 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3388 err = -EADDRNOTAVAIL;
3389 goto errout;
3390 }
6c223828 3391
0ab6803b 3392 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3393 err = -ENOBUFS;
1b29fc2c 3394 goto errout_ifa;
6c223828
NT		 3395 }
3396
6c223828
NT		 3397 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3398 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3399 if (err < 0) {
3400 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3401 WARN_ON(err == -EMSGSIZE);
3402 kfree_skb(skb);
3403 goto errout_ifa;
3404 }
2942e900 3405 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
1b29fc2c 3406errout_ifa:
6c223828 3407 in6_ifa_put(ifa);
1b29fc2c 3408errout:
6c223828 3409 return err;
6c223828
NT		 3410}
3411
1da177e4
LT		 3412static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3413{
3414 struct sk_buff *skb;
5d620266 3415 int err = -ENOBUFS;
1da177e4 3416
0ab6803b 3417 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3418 if (skb == NULL)
3419 goto errout;
3420
3421 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3422 if (err < 0) {
3423 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3424 WARN_ON(err == -EMSGSIZE);
3425 kfree_skb(skb);
3426 goto errout;
3427 }
5d620266
TG		 3428 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3429errout:
3430 if (err < 0)
3431 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3432}
3433
b6f99a21 3434static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3435 __s32 *array, int bytes)
3436{
04561c1f
TG		 3437 BUG_ON(bytes < (DEVCONF_MAX * 4));
3438
1da177e4
LT		 3439 memset(array, 0, bytes);
3440 array[DEVCONF_FORWARDING] = cnf->forwarding;
3441 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3442 array[DEVCONF_MTU6] = cnf->mtu6;
3443 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3444 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3445 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3446 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3447 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3448 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3449 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3450 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3451#ifdef CONFIG_IPV6_PRIVACY
3452 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3453 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3454 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3455 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3456 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3457#endif
3458 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3459 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3460 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3461#ifdef CONFIG_IPV6_ROUTER_PREF
3462 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3463 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3464#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3465 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3466#endif
930d6ff2 3467#endif
fbea49e1 3468 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3469 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3470#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3471 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3472#endif
1da177e4
LT		 3473}
3474
339bf98f
TG		 3475static inline size_t inet6_if_nlmsg_size(void)
3476{
3477 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3478 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3479 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3480 + nla_total_size(4) /* IFLA_MTU */
3481 + nla_total_size(4) /* IFLA_LINK */
3482 + nla_total_size( /* IFLA_PROTINFO */
3483 nla_total_size(4) /* IFLA_INET6_FLAGS */
3484 + nla_total_size(sizeof(struct ifla_cacheinfo))
3485 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3486 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3487 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3488 );
3489}
c5396a31 3490
7f7d9a6b
HX		 3491static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3492 int bytes)
3493{
3494 int i;
3495 int pad = bytes - sizeof(u64) * items;
3496 BUG_ON(pad < 0);
3497
3498 /* Use put_unaligned() because stats may not be aligned for u64. */
3499 put_unaligned(items, &stats[0]);
3500 for (i = 1; i < items; i++)
3501 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3502
3503 memset(&stats[items], 0, pad);
3504}
3505
3506static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3507 int bytes)
3508{
3509 switch(attrtype) {
3510 case IFLA_INET6_STATS:
3511 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3512 break;
3513 case IFLA_INET6_ICMP6STATS:
3514 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3515 break;
3516 }
3517}
3518
1ab1457c 3519static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3520 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3521{
04561c1f 3522 struct net_device *dev = idev->dev;
bf99f1bd 3523 struct nlattr *nla;
04561c1f
TG		 3524 struct ifinfomsg *hdr;
3525 struct nlmsghdr *nlh;
3526 void *protoinfo;
3527 struct ifla_cacheinfo ci;
3528
3529 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3530 if (nlh == NULL)
26932566 3531 return -EMSGSIZE;
04561c1f
TG		 3532
3533 hdr = nlmsg_data(nlh);
3534 hdr->ifi_family = AF_INET6;
3535 hdr->__ifi_pad = 0;
3536 hdr->ifi_type = dev->type;
3537 hdr->ifi_index = dev->ifindex;
3538 hdr->ifi_flags = dev_get_flags(dev);
3539 hdr->ifi_change = 0;
3540
3541 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3542
3543 if (dev->addr_len)
04561c1f 3544 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3545
04561c1f 3546 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3547 if (dev->ifindex != dev->iflink)
04561c1f 3548 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3549
04561c1f
TG		 3550 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3551 if (protoinfo == NULL)
3552 goto nla_put_failure;
1da177e4 3553
04561c1f 3554 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3555
1da177e4
LT		 3556 ci.max_reasm_len = IPV6_MAXPLEN;
3557 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3558 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3559 ci.reachable_time = idev->nd_parms->reachable_time;
3560 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3561 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3562
bf99f1bd
YH		 3563 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3564 if (nla == NULL)
04561c1f 3565 goto nla_put_failure;
bf99f1bd 3566 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3567
bf99f1bd
YH		 3568 /* XXX - MC not implemented */
3569
3570 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3571 if (nla == NULL)
3572 goto nla_put_failure;
3573 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3574
3575 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3576 if (nla == NULL)
3577 goto nla_put_failure;
3578 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3579
04561c1f
TG		 3580 nla_nest_end(skb, protoinfo);
3581 return nlmsg_end(skb, nlh);
1da177e4 3582
04561c1f 3583nla_put_failure:
26932566
PM		 3584 nlmsg_cancel(skb, nlh);
3585 return -EMSGSIZE;
1da177e4
LT		 3586}
3587
3588static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3589{
3590 int idx, err;
3591 int s_idx = cb->args[0];
3592 struct net_device *dev;
3593 struct inet6_dev *idev;
3594
3595 read_lock(&dev_base_lock);
7562f876 3596 idx = 0;
881d966b 3597 for_each_netdev(&init_net, dev) {
1da177e4 3598 if (idx < s_idx)
7562f876 3599 goto cont;
1da177e4 3600 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3601 goto cont;
1ab1457c 3602 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3603 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3604 in6_dev_put(idev);
3605 if (err <= 0)
3606 break;
7562f876
PE		 3607cont:
3608 idx++;
1da177e4
LT		 3609 }
3610 read_unlock(&dev_base_lock);
3611 cb->args[0] = idx;
3612
3613 return skb->len;
3614}
3615
3616void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3617{
3618 struct sk_buff *skb;
8d7a76c9 3619 int err = -ENOBUFS;
1ab1457c 3620
339bf98f 3621 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3622 if (skb == NULL)
3623 goto errout;
3624
3625 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3626 if (err < 0) {
3627 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3628 WARN_ON(err == -EMSGSIZE);
3629 kfree_skb(skb);
3630 goto errout;
3631 }
8d7a76c9
TG		 3632 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3633errout:
3634 if (err < 0)
3635 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3636}
3637
339bf98f
TG		 3638static inline size_t inet6_prefix_nlmsg_size(void)
3639{
3640 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3641 + nla_total_size(sizeof(struct in6_addr))
3642 + nla_total_size(sizeof(struct prefix_cacheinfo));
3643}
c5396a31 3644
1da177e4 3645static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3646 struct prefix_info *pinfo, u32 pid, u32 seq,
3647 int event, unsigned int flags)
1da177e4 3648{
6051e2f4
TG		 3649 struct prefixmsg *pmsg;
3650 struct nlmsghdr *nlh;
1da177e4
LT		 3651 struct prefix_cacheinfo ci;
3652
6051e2f4
TG		 3653 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3654 if (nlh == NULL)
26932566 3655 return -EMSGSIZE;
6051e2f4
TG		 3656
3657 pmsg = nlmsg_data(nlh);
1da177e4 3658 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3659 pmsg->prefix_pad1 = 0;
3660 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3661 pmsg->prefix_ifindex = idev->dev->ifindex;
3662 pmsg->prefix_len = pinfo->prefix_len;
3663 pmsg->prefix_type = pinfo->type;
8a47077a 3664 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3665 pmsg->prefix_flags = 0;
3666 if (pinfo->onlink)
3667 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3668 if (pinfo->autoconf)
3669 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3670
6051e2f4 3671 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3672
3673 ci.preferred_time = ntohl(pinfo->prefered);
3674 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3675 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3676
6051e2f4 3677 return nlmsg_end(skb, nlh);
1da177e4 3678
6051e2f4 3679nla_put_failure:
26932566
PM		 3680 nlmsg_cancel(skb, nlh);
3681 return -EMSGSIZE;
1da177e4
LT		 3682}
3683
1ab1457c 3684static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3685 struct prefix_info *pinfo)
3686{
3687 struct sk_buff *skb;
8c384bfa 3688 int err = -ENOBUFS;
1da177e4 3689
339bf98f 3690 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3691 if (skb == NULL)
3692 goto errout;
3693
3694 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3695 if (err < 0) {
3696 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3697 WARN_ON(err == -EMSGSIZE);
3698 kfree_skb(skb);
3699 goto errout;
3700 }
8c384bfa
TG		 3701 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3702errout:
3703 if (err < 0)
3704 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3705}
3706
1da177e4
LT		 3707static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3708{
3709 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3710
3711 switch (event) {
3712 case RTM_NEWADDR:
95c385b4
NH		 3713 /*
3714 * If the address was optimistic
3715 * we inserted the route at the start of
3716 * our DAD process, so we don't need
3717 * to do it again
3718 */
3719 if (!(ifp->rt->rt6i_node))
3720 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3721 if (ifp->idev->cnf.forwarding)
3722 addrconf_join_anycast(ifp);
3723 break;
3724 case RTM_DELADDR:
3725 if (ifp->idev->cnf.forwarding)
3726 addrconf_leave_anycast(ifp);
3727 addrconf_leave_solict(ifp->idev, &ifp->addr);
3728 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3729 if (ip6_del_rt(ifp->rt))
1da177e4 3730 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3731 break;
3732 }
3733}
3734
3735static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3736{
8814c4b5 3737 rcu_read_lock_bh();
1da177e4
LT		 3738 if (likely(ifp->idev->dead == 0))
3739 __ipv6_ifa_notify(event, ifp);
8814c4b5 3740 rcu_read_unlock_bh();
1da177e4
LT		 3741}
3742
3743#ifdef CONFIG_SYSCTL
3744
3745static
3746int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3747 void __user *buffer, size_t *lenp, loff_t *ppos)
3748{
3749 int *valp = ctl->data;
3750 int val = *valp;
3751 int ret;
3752
3753 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3754
3755 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3756 if (valp != &ipv6_devconf.forwarding) {
3757 if ((!*valp) ^ (!val)) {
3758 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3759 if (idev == NULL)
3760 return ret;
3761 dev_forward_change(idev);
3762 }
3763 } else {
3764 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3765 addrconf_forward_change();
3766 }
3767 if (*valp)
3768 rt6_purge_dflt_routers();
3769 }
3770
1ab1457c 3771 return ret;
1da177e4
LT		 3772}
3773
1ab1457c 3774static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3775 int __user *name, int nlen,
3776 void __user *oldval,
3777 size_t __user *oldlenp,
1f29bcd7 3778 void __user *newval, size_t newlen)
1da177e4
LT		 3779{
3780 int *valp = table->data;
3781 int new;
3782
3783 if (!newval || !newlen)
3784 return 0;
3785 if (newlen != sizeof(int))
3786 return -EINVAL;
3787 if (get_user(new, (int __user *)newval))
3788 return -EFAULT;
3789 if (new == *valp)
3790 return 0;
3791 if (oldval && oldlenp) {
3792 size_t len;
3793 if (get_user(len, oldlenp))
3794 return -EFAULT;
3795 if (len) {
3796 if (len > table->maxlen)
3797 len = table->maxlen;
3798 if (copy_to_user(oldval, valp, len))
3799 return -EFAULT;
3800 if (put_user(len, oldlenp))
3801 return -EFAULT;
3802 }
3803 }
3804
3805 if (valp != &ipv6_devconf_dflt.forwarding) {
3806 if (valp != &ipv6_devconf.forwarding) {
3807 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3808 int changed;
3809 if (unlikely(idev == NULL))
3810 return -ENODEV;
3811 changed = (!*valp) ^ (!new);
3812 *valp = new;
3813 if (changed)
3814 dev_forward_change(idev);
3815 } else {
3816 *valp = new;
3817 addrconf_forward_change();
3818 }
3819
3820 if (*valp)
3821 rt6_purge_dflt_routers();
3822 } else
3823 *valp = new;
3824
3825 return 1;
3826}
3827
3828static struct addrconf_sysctl_table
3829{
3830 struct ctl_table_header *sysctl_header;
3831 ctl_table addrconf_vars[__NET_IPV6_MAX];
3832 ctl_table addrconf_dev[2];
3833 ctl_table addrconf_conf_dir[2];
3834 ctl_table addrconf_proto_dir[2];
3835 ctl_table addrconf_root_dir[2];
ab32ea5d 3836} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3837 .sysctl_header = NULL,
3838 .addrconf_vars = {
1ab1457c 3839 {
1da177e4
LT		 3840 .ctl_name = NET_IPV6_FORWARDING,
3841 .procname = "forwarding",
1ab1457c 3842 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 3843 .maxlen = sizeof(int),
3844 .mode = 0644,
1ab1457c 3845 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 3846 .strategy = &addrconf_sysctl_forward_strategy,
3847 },
3848 {
3849 .ctl_name = NET_IPV6_HOP_LIMIT,
3850 .procname = "hop_limit",
1ab1457c 3851 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 3852 .maxlen = sizeof(int),
3853 .mode = 0644,
3854 .proc_handler = proc_dointvec,
3855 },
3856 {
3857 .ctl_name = NET_IPV6_MTU,
3858 .procname = "mtu",
3859 .data = &ipv6_devconf.mtu6,
1ab1457c 3860 .maxlen = sizeof(int),
1da177e4 3861 .mode = 0644,
1ab1457c 3862 .proc_handler = &proc_dointvec,
1da177e4
LT		 3863 },
3864 {
3865 .ctl_name = NET_IPV6_ACCEPT_RA,
3866 .procname = "accept_ra",
1ab1457c 3867 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 3868 .maxlen = sizeof(int),
3869 .mode = 0644,
1ab1457c 3870 .proc_handler = &proc_dointvec,
1da177e4
LT		 3871 },
3872 {
3873 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3874 .procname = "accept_redirects",
1ab1457c 3875 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 3876 .maxlen = sizeof(int),
3877 .mode = 0644,
1ab1457c 3878 .proc_handler = &proc_dointvec,
1da177e4
LT		 3879 },
3880 {
3881 .ctl_name = NET_IPV6_AUTOCONF,
3882 .procname = "autoconf",
1ab1457c 3883 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 3884 .maxlen = sizeof(int),
3885 .mode = 0644,
1ab1457c 3886 .proc_handler = &proc_dointvec,
1da177e4
LT		 3887 },
3888 {
3889 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3890 .procname = "dad_transmits",
1ab1457c 3891 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 3892 .maxlen = sizeof(int),
3893 .mode = 0644,
1ab1457c 3894 .proc_handler = &proc_dointvec,
1da177e4
LT		 3895 },
3896 {
3897 .ctl_name = NET_IPV6_RTR_SOLICITS,
3898 .procname = "router_solicitations",
1ab1457c 3899 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 3900 .maxlen = sizeof(int),
3901 .mode = 0644,
1ab1457c 3902 .proc_handler = &proc_dointvec,
1da177e4
LT		 3903 },
3904 {
3905 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3906 .procname = "router_solicitation_interval",
1ab1457c 3907 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 3908 .maxlen = sizeof(int),
3909 .mode = 0644,
1ab1457c 3910 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3911 .strategy = &sysctl_jiffies,
3912 },
3913 {
3914 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3915 .procname = "router_solicitation_delay",
1ab1457c 3916 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 3917 .maxlen = sizeof(int),
3918 .mode = 0644,
1ab1457c 3919 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3920 .strategy = &sysctl_jiffies,
3921 },
3922 {
3923 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3924 .procname = "force_mld_version",
1ab1457c 3925 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 3926 .maxlen = sizeof(int),
3927 .mode = 0644,
1ab1457c 3928 .proc_handler = &proc_dointvec,
1da177e4
LT		 3929 },
3930#ifdef CONFIG_IPV6_PRIVACY
3931 {
3932 .ctl_name = NET_IPV6_USE_TEMPADDR,
3933 .procname = "use_tempaddr",
1ab1457c 3934 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 3935 .maxlen = sizeof(int),
3936 .mode = 0644,
1ab1457c 3937 .proc_handler = &proc_dointvec,
1da177e4
LT		 3938 },
3939 {
3940 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3941 .procname = "temp_valid_lft",
1ab1457c 3942 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 3943 .maxlen = sizeof(int),
3944 .mode = 0644,
1ab1457c 3945 .proc_handler = &proc_dointvec,
1da177e4
LT		 3946 },
3947 {
3948 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3949 .procname = "temp_prefered_lft",
1ab1457c 3950 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 3951 .maxlen = sizeof(int),
3952 .mode = 0644,
1ab1457c 3953 .proc_handler = &proc_dointvec,
1da177e4
LT		 3954 },
3955 {
3956 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3957 .procname = "regen_max_retry",
1ab1457c 3958 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 3959 .maxlen = sizeof(int),
3960 .mode = 0644,
1ab1457c 3961 .proc_handler = &proc_dointvec,
1da177e4
LT		 3962 },
3963 {
3964 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3965 .procname = "max_desync_factor",
1ab1457c 3966 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 3967 .maxlen = sizeof(int),
3968 .mode = 0644,
1ab1457c 3969 .proc_handler = &proc_dointvec,
1da177e4
LT		 3970 },
3971#endif
3972 {
3973 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3974 .procname = "max_addresses",
3975 .data = &ipv6_devconf.max_addresses,
3976 .maxlen = sizeof(int),
3977 .mode = 0644,
3978 .proc_handler = &proc_dointvec,
3979 },
65f5c7c1
YH		 3980 {
3981 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3982 .procname = "accept_ra_defrtr",
1ab1457c 3983 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 3984 .maxlen = sizeof(int),
3985 .mode = 0644,
1ab1457c 3986 .proc_handler = &proc_dointvec,
65f5c7c1 3987 },
c4fd30eb
YH		 3988 {
3989 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3990 .procname = "accept_ra_pinfo",
1ab1457c 3991 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 3992 .maxlen = sizeof(int),
3993 .mode = 0644,
1ab1457c 3994 .proc_handler = &proc_dointvec,
c4fd30eb 3995 },
930d6ff2
YH		 3996#ifdef CONFIG_IPV6_ROUTER_PREF
3997 {
3998 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3999 .procname = "accept_ra_rtr_pref",
4000 .data = &ipv6_devconf.accept_ra_rtr_pref,
4001 .maxlen = sizeof(int),
4002 .mode = 0644,
4003 .proc_handler = &proc_dointvec,
4004 },
52e16356
YH		 4005 {
4006 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4007 .procname = "router_probe_interval",
4008 .data = &ipv6_devconf.rtr_probe_interval,
4009 .maxlen = sizeof(int),
4010 .mode = 0644,
4011 .proc_handler = &proc_dointvec_jiffies,
4012 .strategy = &sysctl_jiffies,
4013 },
fa03ef38 4014#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4015 {
4016 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4017 .procname = "accept_ra_rt_info_max_plen",
4018 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4019 .maxlen = sizeof(int),
4020 .mode = 0644,
4021 .proc_handler = &proc_dointvec,
4022 },
4023#endif
930d6ff2 4024#endif
fbea49e1
YH		 4025 {
4026 .ctl_name = NET_IPV6_PROXY_NDP,
4027 .procname = "proxy_ndp",
4028 .data = &ipv6_devconf.proxy_ndp,
4029 .maxlen = sizeof(int),
4030 .mode = 0644,
4031 .proc_handler = &proc_dointvec,
4032 },
0bcbc926
YH		 4033 {
4034 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4035 .procname = "accept_source_route",
4036 .data = &ipv6_devconf.accept_source_route,
4037 .maxlen = sizeof(int),
4038 .mode = 0644,
4039 .proc_handler = &proc_dointvec,
4040 },
95c385b4
NH		 4041#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4042 {
4043 .ctl_name = CTL_UNNUMBERED,
4044 .procname = "optimistic_dad",
4045 .data = &ipv6_devconf.optimistic_dad,
4046 .maxlen = sizeof(int),
4047 .mode = 0644,
4048 .proc_handler = &proc_dointvec,
4049
4050 },
4051#endif
1da177e4
LT		 4052 {
4053 .ctl_name = 0, /* sentinel */
4054 }
4055 },
4056 .addrconf_dev = {
4057 {
4058 .ctl_name = NET_PROTO_CONF_ALL,
4059 .procname = "all",
4060 .mode = 0555,
4061 .child = addrconf_sysctl.addrconf_vars,
4062 },
4063 {
4064 .ctl_name = 0, /* sentinel */
4065 }
4066 },
4067 .addrconf_conf_dir = {
4068 {
4069 .ctl_name = NET_IPV6_CONF,
4070 .procname = "conf",
4071 .mode = 0555,
4072 .child = addrconf_sysctl.addrconf_dev,
4073 },
4074 {
4075 .ctl_name = 0, /* sentinel */
4076 }
4077 },
4078 .addrconf_proto_dir = {
4079 {
4080 .ctl_name = NET_IPV6,
4081 .procname = "ipv6",
4082 .mode = 0555,
4083 .child = addrconf_sysctl.addrconf_conf_dir,
4084 },
4085 {
4086 .ctl_name = 0, /* sentinel */
4087 }
4088 },
4089 .addrconf_root_dir = {
4090 {
4091 .ctl_name = CTL_NET,
4092 .procname = "net",
4093 .mode = 0555,
4094 .child = addrconf_sysctl.addrconf_proto_dir,
4095 },
4096 {
4097 .ctl_name = 0, /* sentinel */
4098 }
4099 },
4100};
4101
4102static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
4103{
4104 int i;
4105 struct net_device *dev = idev ? idev->dev : NULL;
4106 struct addrconf_sysctl_table *t;
4107 char *dev_name = NULL;
4108
af879cc7 4109 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4
LT		 4110 if (t == NULL)
4111 return;
1da177e4
LT		 4112 for (i=0; t->addrconf_vars[i].data; i++) {
4113 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4
LT		 4114 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4115 }
4116 if (dev) {
1ab1457c 4117 dev_name = dev->name;
1da177e4
LT		 4118 t->addrconf_dev[0].ctl_name = dev->ifindex;
4119 } else {
4120 dev_name = "default";
4121 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
4122 }
4123
1ab1457c
YH		 4124 /*
4125 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4126 * by sysctl and we wouldn't want anyone to change it under our feet
4127 * (see SIOCSIFNAME).
1ab1457c 4128 */
543537bd 4129 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 4130 if (!dev_name)
4131 goto free;
4132
4133 t->addrconf_dev[0].procname = dev_name;
4134
4135 t->addrconf_dev[0].child = t->addrconf_vars;
1da177e4 4136 t->addrconf_conf_dir[0].child = t->addrconf_dev;
1da177e4 4137 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
1da177e4 4138 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
1da177e4 4139
0b4d4147 4140 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
1da177e4
LT		 4141 if (t->sysctl_header == NULL)
4142 goto free_procname;
4143 else
4144 p->sysctl = t;
4145 return;
4146
4147 /* error path */
4148 free_procname:
4149 kfree(dev_name);
4150 free:
4151 kfree(t);
4152
4153 return;
4154}
4155
4156static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
4157{
4158 if (p->sysctl) {
4159 struct addrconf_sysctl_table *t = p->sysctl;
4160 p->sysctl = NULL;
4161 unregister_sysctl_table(t->sysctl_header);
4162 kfree(t->addrconf_dev[0].procname);
4163 kfree(t);
4164 }
4165}
4166
4167
4168#endif
4169
4170/*
4171 * Device notifier
4172 */
4173
4174int register_inet6addr_notifier(struct notifier_block *nb)
4175{
1ab1457c 4176 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4177}
4178
7159039a
YH		 4179EXPORT_SYMBOL(register_inet6addr_notifier);
4180
1da177e4
LT		 4181int unregister_inet6addr_notifier(struct notifier_block *nb)
4182{
1ab1457c 4183 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4184}
4185
7159039a
YH		 4186EXPORT_SYMBOL(unregister_inet6addr_notifier);
4187
1da177e4
LT		 4188/*
4189 * Init / cleanup code
4190 */
4191
4192int __init addrconf_init(void)
4193{
4194 int err = 0;
4195
4196 /* The addrconf netdev notifier requires that loopback_dev
4197 * has it's ipv6 private information allocated and setup
4198 * before it can bring up and give link-local addresses
4199 * to other devices which are up.
4200 *
4201 * Unfortunately, loopback_dev is not necessarily the first
4202 * entry in the global dev_base list of net devices. In fact,
4203 * it is likely to be the very last entry on that list.
4204 * So this causes the notifier registry below to try and
4205 * give link-local addresses to all devices besides loopback_dev
4206 * first, then loopback_dev, which cases all the non-loopback_dev
4207 * devices to fail to get a link-local address.
4208 *
4209 * So, as a temporary fix, allocate the ipv6 structure for
4210 * loopback_dev first by hand.
4211 * Longer term, all of the dependencies ipv6 has upon the loopback
4212 * device and it being up should be removed.
4213 */
4214 rtnl_lock();
de3cb747 4215 if (!ipv6_add_dev(loopback_dev))
1da177e4
LT		 4216 err = -ENOMEM;
4217 rtnl_unlock();
4218 if (err)
4219 return err;
4220
de3cb747
DL		 4221 ip6_null_entry.u.dst.dev = loopback_dev;
4222 ip6_null_entry.rt6i_idev = in6_dev_get(loopback_dev);
9a6bf6fe 4223#ifdef CONFIG_IPV6_MULTIPLE_TABLES
de3cb747
DL		 4224 ip6_prohibit_entry.u.dst.dev = loopback_dev;
4225 ip6_prohibit_entry.rt6i_idev = in6_dev_get(loopback_dev);
4226 ip6_blk_hole_entry.u.dst.dev = loopback_dev;
4227 ip6_blk_hole_entry.rt6i_idev = in6_dev_get(loopback_dev);
9a6bf6fe 4228#endif
c62dba90 4229
1da177e4
LT		 4230 register_netdevice_notifier(&ipv6_dev_notf);
4231
1da177e4 4232 addrconf_verify(0);
c127ea2c
TG		 4233
4234 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4235 if (err < 0)
4236 goto errout;
4237
4238 /* Only the first call to __rtnl_register can fail */
4239 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4240 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4241 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4242 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4243 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4244
1da177e4
LT		 4245#ifdef CONFIG_SYSCTL
4246 addrconf_sysctl.sysctl_header =
0b4d4147 4247 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
1da177e4
LT		 4248 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4249#endif
4250
4251 return 0;
c127ea2c
TG		 4252errout:
4253 unregister_netdevice_notifier(&ipv6_dev_notf);
4254
4255 return err;
1da177e4
LT		 4256}
4257
4258void __exit addrconf_cleanup(void)
4259{
1ab1457c 4260 struct net_device *dev;
1ab1457c 4261 struct inet6_ifaddr *ifa;
1da177e4
LT		 4262 int i;
4263
4264 unregister_netdevice_notifier(&ipv6_dev_notf);
4265
1da177e4
LT		 4266#ifdef CONFIG_SYSCTL
4267 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4268 addrconf_sysctl_unregister(&ipv6_devconf);
4269#endif
4270
4271 rtnl_lock();
4272
4273 /*
4274 * clean dev list.
4275 */
4276
881d966b 4277 for_each_netdev(&init_net, dev) {
dffe4f04 4278 if (__in6_dev_get(dev) == NULL)
1da177e4
LT		 4279 continue;
4280 addrconf_ifdown(dev, 1);
4281 }
de3cb747 4282 addrconf_ifdown(loopback_dev, 2);
1da177e4
LT		 4283
4284 /*
4285 * Check hash table.
4286 */
4287
4288 write_lock_bh(&addrconf_hash_lock);
4289 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4290 for (ifa=inet6_addr_lst[i]; ifa; ) {
4291 struct inet6_ifaddr *bifa;
4292
4293 bifa = ifa;
4294 ifa = ifa->lst_next;
4295 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4296 /* Do not free it; something is wrong.
4297 Now we can investigate it with debugger.
4298 */
4299 }
4300 }
4301 write_unlock_bh(&addrconf_hash_lock);
4302
4303 del_timer(&addr_chk_timer);
4304
4305 rtnl_unlock();
4306
1da177e4 4307#ifdef CONFIG_PROC_FS
457c4cbc 4308 proc_net_remove(&init_net, "if_inet6");
1da177e4
LT		 4309#endif
4310}
kernel source for telekom puls (alcatel/mediatek)