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tcp: missing check ACK flag of received segment in FIN-WAIT-2 state
[net-next-2.6.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 *
1da177e4
LT		 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * Changes:
17 *
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
21 * unload.
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
24 * packets.
25 * yoshfuji@USAGI : Fixed interval between DAD
26 * packets.
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
30 * support.
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
35 * seq_file.
b1cacb68
YH		 36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
38 * status etc.
1da177e4
LT		 39 */
40
1da177e4
LT		 41#include <linux/errno.h>
42#include <linux/types.h>
a0bffffc 43#include <linux/kernel.h>
1da177e4
LT		 44#include <linux/socket.h>
45#include <linux/sockios.h>
1da177e4
LT		 46#include <linux/net.h>
47#include <linux/in6.h>
48#include <linux/netdevice.h>
1823730f 49#include <linux/if_addr.h>
1da177e4
LT		 50#include <linux/if_arp.h>
51#include <linux/if_arcnet.h>
52#include <linux/if_infiniband.h>
53#include <linux/route.h>
54#include <linux/inetdevice.h>
55#include <linux/init.h>
56#ifdef CONFIG_SYSCTL
57#include <linux/sysctl.h>
58#endif
4fc268d2 59#include <linux/capability.h>
1da177e4
LT		 60#include <linux/delay.h>
61#include <linux/notifier.h>
543537bd 62#include <linux/string.h>
1da177e4 63
457c4cbc 64#include <net/net_namespace.h>
1da177e4
LT		 65#include <net/sock.h>
66#include <net/snmp.h>
67
68#include <net/ipv6.h>
69#include <net/protocol.h>
70#include <net/ndisc.h>
71#include <net/ip6_route.h>
72#include <net/addrconf.h>
73#include <net/tcp.h>
74#include <net/ip.h>
5d620266 75#include <net/netlink.h>
f24e3d65 76#include <net/pkt_sched.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
f52295a9 103static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 104static void addrconf_sysctl_unregister(struct inet6_dev *idev);
105#else
106static inline void addrconf_sysctl_register(struct inet6_dev *idev)
107{
108}
109
110static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
111{
112}
1da177e4
LT		 113#endif
114
115#ifdef CONFIG_IPV6_PRIVACY
116static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 117static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 118static void ipv6_regen_rndid(unsigned long data);
119
120static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 121#endif
122
1b34be74 123static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 124static int ipv6_count_addresses(struct inet6_dev *idev);
125
126/*
127 * Configured unicast address hash table
128 */
129static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130static DEFINE_RWLOCK(addrconf_hash_lock);
131
1da177e4
LT		 132static void addrconf_verify(unsigned long);
133
8d06afab 134static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 135static DEFINE_SPINLOCK(addrconf_verify_lock);
136
137static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139
140static int addrconf_ifdown(struct net_device *dev, int how);
141
e431b8c0 142static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 143static void addrconf_dad_timer(unsigned long data);
144static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 145static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 146static void addrconf_rs_timer(unsigned long data);
147static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
149
1ab1457c 150static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 151 struct prefix_info *pinfo);
06bfe655
DL		 152static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
153 struct net_device *dev);
1da177e4 154
e041c683 155static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 156
888c848e 157static struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 158 .forwarding = 0,
159 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
160 .mtu6 = IPV6_MIN_MTU,
161 .accept_ra = 1,
162 .accept_redirects = 1,
163 .autoconf = 1,
164 .force_mld_version = 0,
165 .dad_transmits = 1,
166 .rtr_solicits = MAX_RTR_SOLICITATIONS,
167 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
168 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
169#ifdef CONFIG_IPV6_PRIVACY
170 .use_tempaddr = 0,
171 .temp_valid_lft = TEMP_VALID_LIFETIME,
172 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
173 .regen_max_retry = REGEN_MAX_RETRY,
174 .max_desync_factor = MAX_DESYNC_FACTOR,
175#endif
176 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 177 .accept_ra_defrtr = 1,
c4fd30eb 178 .accept_ra_pinfo = 1,
930d6ff2
YH		 179#ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref = 1,
52e16356 181 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 182#ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen = 0,
184#endif
930d6ff2 185#endif
fbea49e1 186 .proxy_ndp = 0,
0bcbc926 187 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 188 .disable_ipv6 = 0,
1b34be74 189 .accept_dad = 1,
1da177e4
LT		 190};
191
ab32ea5d 192static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 193 .forwarding = 0,
194 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
195 .mtu6 = IPV6_MIN_MTU,
196 .accept_ra = 1,
197 .accept_redirects = 1,
198 .autoconf = 1,
199 .dad_transmits = 1,
200 .rtr_solicits = MAX_RTR_SOLICITATIONS,
201 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
202 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
203#ifdef CONFIG_IPV6_PRIVACY
204 .use_tempaddr = 0,
205 .temp_valid_lft = TEMP_VALID_LIFETIME,
206 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
207 .regen_max_retry = REGEN_MAX_RETRY,
208 .max_desync_factor = MAX_DESYNC_FACTOR,
209#endif
210 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 211 .accept_ra_defrtr = 1,
c4fd30eb 212 .accept_ra_pinfo = 1,
930d6ff2
YH		 213#ifdef CONFIG_IPV6_ROUTER_PREF
214 .accept_ra_rtr_pref = 1,
52e16356 215 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 216#ifdef CONFIG_IPV6_ROUTE_INFO
217 .accept_ra_rt_info_max_plen = 0,
218#endif
930d6ff2 219#endif
fbea49e1 220 .proxy_ndp = 0,
0bcbc926 221 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 222 .disable_ipv6 = 0,
1b34be74 223 .accept_dad = 1,
1da177e4
LT		 224};
225
226/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 227const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 228const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 229const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
230const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 231
f24e3d65 232/* Check if a valid qdisc is available */
05297949 233static inline bool addrconf_qdisc_ok(const struct net_device *dev)
f24e3d65 234{
05297949 235 return !qdisc_tx_is_noop(dev);
f24e3d65
MC		 236}
237
2b5ead46
YH		 238/* Check if a route is valid prefix route */
239static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
240{
241 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
242}
243
1da177e4
LT		 244static void addrconf_del_timer(struct inet6_ifaddr *ifp)
245{
246 if (del_timer(&ifp->timer))
247 __in6_ifa_put(ifp);
248}
249
250enum addrconf_timer_t
251{
252 AC_NONE,
253 AC_DAD,
254 AC_RS,
255};
256
257static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
258 enum addrconf_timer_t what,
259 unsigned long when)
260{
261 if (!del_timer(&ifp->timer))
262 in6_ifa_hold(ifp);
263
264 switch (what) {
265 case AC_DAD:
266 ifp->timer.function = addrconf_dad_timer;
267 break;
268 case AC_RS:
269 ifp->timer.function = addrconf_rs_timer;
270 break;
271 default:;
272 }
273 ifp->timer.expires = jiffies + when;
274 add_timer(&ifp->timer);
275}
276
7f7d9a6b
HX		 277static int snmp6_alloc_dev(struct inet6_dev *idev)
278{
7f7d9a6b 279 if (snmp_mib_init((void **)idev->stats.ipv6,
c69bce20 280 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b
HX		 281 goto err_ip;
282 if (snmp_mib_init((void **)idev->stats.icmpv6,
c69bce20 283 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 284 goto err_icmp;
14878f75 285 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
c69bce20 286 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 287 goto err_icmpmsg;
7f7d9a6b
HX		 288
289 return 0;
290
14878f75
DS		 291err_icmpmsg:
292 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 293err_icmp:
294 snmp_mib_free((void **)idev->stats.ipv6);
295err_ip:
aaf70ec7 296 return -ENOMEM;
7f7d9a6b
HX		 297}
298
16910b98 299static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 300{
14878f75 301 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 302 snmp_mib_free((void **)idev->stats.icmpv6);
303 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 304}
305
1da177e4
LT		 306/* Nobody refers to this device, we may destroy it. */
307
8814c4b5
YH		 308static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
309{
310 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
311 kfree(idev);
312}
313
1da177e4
LT		 314void in6_dev_finish_destroy(struct inet6_dev *idev)
315{
316 struct net_device *dev = idev->dev;
547b792c
IJ		 317
318 WARN_ON(idev->addr_list != NULL);
319 WARN_ON(idev->mc_list != NULL);
320
1da177e4
LT		 321#ifdef NET_REFCNT_DEBUG
322 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
323#endif
324 dev_put(dev);
325 if (!idev->dead) {
326 printk("Freeing alive inet6 device %p\n", idev);
327 return;
328 }
329 snmp6_free_dev(idev);
8814c4b5 330 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 331}
332
7159039a
YH		 333EXPORT_SYMBOL(in6_dev_finish_destroy);
334
1da177e4
LT		 335static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
336{
337 struct inet6_dev *ndev;
338
339 ASSERT_RTNL();
340
341 if (dev->mtu < IPV6_MIN_MTU)
342 return NULL;
343
1ab1457c 344 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 345
1ab1457c
YH		 346 if (ndev == NULL)
347 return NULL;
322f74a4
IO		 348
349 rwlock_init(&ndev->lock);
350 ndev->dev = dev;
c346dca1 351 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 352 ndev->cnf.mtu6 = dev->mtu;
353 ndev->cnf.sysctl = NULL;
354 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
355 if (ndev->nd_parms == NULL) {
356 kfree(ndev);
357 return NULL;
358 }
0187bdfb
BH		 359 if (ndev->cnf.forwarding)
360 dev_disable_lro(dev);
322f74a4
IO		 361 /* We refer to the device */
362 dev_hold(dev);
1da177e4 363
322f74a4
IO		 364 if (snmp6_alloc_dev(ndev) < 0) {
365 ADBG((KERN_WARNING
366 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 367 __func__, dev->name));
322f74a4
IO		 368 neigh_parms_release(&nd_tbl, ndev->nd_parms);
369 ndev->dead = 1;
370 in6_dev_finish_destroy(ndev);
371 return NULL;
372 }
1da177e4 373
322f74a4
IO		 374 if (snmp6_register_dev(ndev) < 0) {
375 ADBG((KERN_WARNING
376 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 377 __func__, dev->name));
322f74a4
IO		 378 neigh_parms_release(&nd_tbl, ndev->nd_parms);
379 ndev->dead = 1;
380 in6_dev_finish_destroy(ndev);
381 return NULL;
382 }
383
384 /* One reference from device. We must do this before
385 * we invoke __ipv6_regen_rndid().
386 */
387 in6_dev_hold(ndev);
1da177e4 388
1b34be74
YH		 389 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
390 ndev->cnf.accept_dad = -1;
391
b077d7ab
YH		 392#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
393 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
394 printk(KERN_INFO
395 "%s: Disabled Multicast RS\n",
396 dev->name);
397 ndev->cnf.rtr_solicits = 0;
398 }
399#endif
400
1da177e4 401#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 402 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 403 if ((dev->flags&IFF_LOOPBACK) ||
404 dev->type == ARPHRD_TUNNEL ||
9625ed72 405 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 406 dev->type == ARPHRD_SIT ||
0be669bb 407 dev->type == ARPHRD_NONE) {
322f74a4
IO		 408 printk(KERN_INFO
409 "%s: Disabled Privacy Extensions\n",
410 dev->name);
411 ndev->cnf.use_tempaddr = -1;
412 } else {
413 in6_dev_hold(ndev);
414 ipv6_regen_rndid((unsigned long) ndev);
415 }
1da177e4
LT		 416#endif
417
f24e3d65 418 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 419 ndev->if_flags |= IF_READY;
420
322f74a4
IO		 421 ipv6_mc_init_dev(ndev);
422 ndev->tstamp = jiffies;
f52295a9 423 addrconf_sysctl_register(ndev);
30c4cf57
DS		 424 /* protected by rtnl_lock */
425 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 426
427 /* Join all-node multicast group */
f3ee4010 428 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 429
1da177e4
LT		 430 return ndev;
431}
432
cee89473 433static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 434{
435 struct inet6_dev *idev;
436
437 ASSERT_RTNL();
438
439 if ((idev = __in6_dev_get(dev)) == NULL) {
440 if ((idev = ipv6_add_dev(dev)) == NULL)
441 return NULL;
442 }
c5e33bdd 443
1da177e4
LT		 444 if (dev->flags&IFF_UP)
445 ipv6_mc_up(idev);
446 return idev;
447}
448
449#ifdef CONFIG_SYSCTL
450static void dev_forward_change(struct inet6_dev *idev)
451{
452 struct net_device *dev;
453 struct inet6_ifaddr *ifa;
1da177e4
LT		 454
455 if (!idev)
456 return;
457 dev = idev->dev;
0187bdfb
BH		 458 if (idev->cnf.forwarding)
459 dev_disable_lro(dev);
1da177e4 460 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 461 if (idev->cnf.forwarding)
f3ee4010 462 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 463 else
f3ee4010 464 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4
LT		 465 }
466 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 467 if (ifa->flags&IFA_F_TENTATIVE)
468 continue;
1da177e4
LT		 469 if (idev->cnf.forwarding)
470 addrconf_join_anycast(ifa);
471 else
472 addrconf_leave_anycast(ifa);
473 }
474}
475
476
e186932b 477static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 478{
479 struct net_device *dev;
480 struct inet6_dev *idev;
481
482 read_lock(&dev_base_lock);
bff16c2f 483 for_each_netdev(net, dev) {
8814c4b5 484 rcu_read_lock();
1da177e4
LT		 485 idev = __in6_dev_get(dev);
486 if (idev) {
e186932b
PE		 487 int changed = (!idev->cnf.forwarding) ^ (!newf);
488 idev->cnf.forwarding = newf;
1da177e4
LT		 489 if (changed)
490 dev_forward_change(idev);
491 }
8814c4b5 492 rcu_read_unlock();
1da177e4
LT		 493 }
494 read_unlock(&dev_base_lock);
495}
c8fecf22 496
b325fddb 497static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
c8fecf22 498{
bff16c2f
PE		 499 struct net *net;
500
501 net = (struct net *)table->extra2;
441fc2a2 502 if (p == &net->ipv6.devconf_dflt->forwarding)
b325fddb
SH		 503 return 0;
504
505 if (!rtnl_trylock())
5007392d 506 return restart_syscall();
c8fecf22 507
e186932b
PE		 508 if (p == &net->ipv6.devconf_all->forwarding) {
509 __s32 newf = net->ipv6.devconf_all->forwarding;
510 net->ipv6.devconf_dflt->forwarding = newf;
511 addrconf_forward_change(net, newf);
c8fecf22
PE		 512 } else if ((!*p) ^ (!old))
513 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 514 rtnl_unlock();
c8fecf22
PE		 515
516 if (*p)
7b4da532 517 rt6_purge_dflt_routers(net);
b325fddb 518 return 1;
c8fecf22 519}
1da177e4
LT		 520#endif
521
522/* Nobody refers to this ifaddr, destroy it */
523
524void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
525{
547b792c
IJ		 526 WARN_ON(ifp->if_next != NULL);
527 WARN_ON(ifp->lst_next != NULL);
528
1da177e4
LT		 529#ifdef NET_REFCNT_DEBUG
530 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
531#endif
532
533 in6_dev_put(ifp->idev);
534
535 if (del_timer(&ifp->timer))
536 printk("Timer is still running, when freeing ifa=%p\n", ifp);
537
538 if (!ifp->dead) {
539 printk("Freeing alive inet6 address %p\n", ifp);
540 return;
541 }
542 dst_release(&ifp->rt->u.dst);
543
544 kfree(ifp);
545}
546
e55ffac6
BH		 547static void
548ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
549{
550 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 551 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 552
553 /*
554 * Each device address list is sorted in order of scope -
555 * global before linklocal.
556 */
557 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
558 ifap = &ifa->if_next) {
8a6ce0c0 559 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 560 break;
561 }
562
563 ifp->if_next = *ifap;
564 *ifap = ifp;
565}
566
3eb84f49
YH		 567/*
568 * Hash function taken from net_alias.c
569 */
570static u8 ipv6_addr_hash(const struct in6_addr *addr)
571{
572 __u32 word;
573
574 /*
575 * We perform the hash function over the last 64 bits of the address
576 * This will include the IEEE address token on links that support it.
577 */
578
579 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
580 word ^= (word >> 16);
581 word ^= (word >> 8);
582
583 return ((word ^ (word >> 4)) & 0x0f);
584}
585
1da177e4
LT		 586/* On success it returns ifp with increased reference count */
587
588static struct inet6_ifaddr *
589ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 590 int scope, u32 flags)
1da177e4
LT		 591{
592 struct inet6_ifaddr *ifa = NULL;
593 struct rt6_info *rt;
594 int hash;
595 int err = 0;
d68b8270
YH		 596 int addr_type = ipv6_addr_type(addr);
597
598 if (addr_type == IPV6_ADDR_ANY ||
599 addr_type & IPV6_ADDR_MULTICAST ||
600 (!(idev->dev->flags & IFF_LOOPBACK) &&
601 addr_type & IPV6_ADDR_LOOPBACK))
602 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 603
8814c4b5 604 rcu_read_lock_bh();
1da177e4
LT		 605 if (idev->dead) {
606 err = -ENODEV; /*XXX*/
607 goto out2;
608 }
609
56d417b1 610 if (idev->cnf.disable_ipv6) {
9bdd8d40
BH		 611 err = -EACCES;
612 goto out2;
613 }
614
1da177e4
LT		 615 write_lock(&addrconf_hash_lock);
616
617 /* Ignore adding duplicate addresses on an interface */
c346dca1 618 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 619 ADBG(("ipv6_add_addr: already assigned\n"));
620 err = -EEXIST;
621 goto out;
622 }
623
322f74a4 624 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 625
626 if (ifa == NULL) {
627 ADBG(("ipv6_add_addr: malloc failed\n"));
628 err = -ENOBUFS;
629 goto out;
630 }
631
632 rt = addrconf_dst_alloc(idev, addr, 0);
633 if (IS_ERR(rt)) {
634 err = PTR_ERR(rt);
635 goto out;
636 }
637
1da177e4
LT		 638 ipv6_addr_copy(&ifa->addr, addr);
639
640 spin_lock_init(&ifa->lock);
641 init_timer(&ifa->timer);
642 ifa->timer.data = (unsigned long) ifa;
643 ifa->scope = scope;
644 ifa->prefix_len = pfxlen;
645 ifa->flags = flags | IFA_F_TENTATIVE;
646 ifa->cstamp = ifa->tstamp = jiffies;
647
57f5f544
KF		 648 ifa->rt = rt;
649
95c385b4
NH		 650 /*
651 * part one of RFC 4429, section 3.3
652 * We should not configure an address as
653 * optimistic if we do not yet know the link
654 * layer address of our nexhop router
655 */
656
657 if (rt->rt6i_nexthop == NULL)
658 ifa->flags &= ~IFA_F_OPTIMISTIC;
659
1da177e4
LT		 660 ifa->idev = idev;
661 in6_dev_hold(idev);
662 /* For caller */
663 in6_ifa_hold(ifa);
664
665 /* Add to big hash table */
666 hash = ipv6_addr_hash(addr);
667
668 ifa->lst_next = inet6_addr_lst[hash];
669 inet6_addr_lst[hash] = ifa;
670 in6_ifa_hold(ifa);
671 write_unlock(&addrconf_hash_lock);
672
673 write_lock(&idev->lock);
674 /* Add to inet6_dev unicast addr list. */
e55ffac6 675 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 676
677#ifdef CONFIG_IPV6_PRIVACY
678 if (ifa->flags&IFA_F_TEMPORARY) {
679 ifa->tmp_next = idev->tempaddr_list;
680 idev->tempaddr_list = ifa;
681 in6_ifa_hold(ifa);
682 }
683#endif
684
1da177e4
LT		 685 in6_ifa_hold(ifa);
686 write_unlock(&idev->lock);
687out2:
8814c4b5 688 rcu_read_unlock_bh();
1da177e4 689
fd92833a 690 if (likely(err == 0))
e041c683 691 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 692 else {
693 kfree(ifa);
694 ifa = ERR_PTR(err);
695 }
696
697 return ifa;
698out:
699 write_unlock(&addrconf_hash_lock);
700 goto out2;
701}
702
703/* This function wants to get referenced ifp and releases it before return */
704
705static void ipv6_del_addr(struct inet6_ifaddr *ifp)
706{
707 struct inet6_ifaddr *ifa, **ifap;
708 struct inet6_dev *idev = ifp->idev;
709 int hash;
710 int deleted = 0, onlink = 0;
711 unsigned long expires = jiffies;
712
713 hash = ipv6_addr_hash(&ifp->addr);
714
715 ifp->dead = 1;
716
717 write_lock_bh(&addrconf_hash_lock);
718 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
719 ifap = &ifa->lst_next) {
720 if (ifa == ifp) {
721 *ifap = ifa->lst_next;
722 __in6_ifa_put(ifp);
723 ifa->lst_next = NULL;
724 break;
725 }
726 }
727 write_unlock_bh(&addrconf_hash_lock);
728
729 write_lock_bh(&idev->lock);
730#ifdef CONFIG_IPV6_PRIVACY
731 if (ifp->flags&IFA_F_TEMPORARY) {
732 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
733 ifap = &ifa->tmp_next) {
734 if (ifa == ifp) {
735 *ifap = ifa->tmp_next;
736 if (ifp->ifpub) {
737 in6_ifa_put(ifp->ifpub);
738 ifp->ifpub = NULL;
739 }
740 __in6_ifa_put(ifp);
741 ifa->tmp_next = NULL;
742 break;
743 }
744 }
745 }
746#endif
747
1d142804 748 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 749 if (ifa == ifp) {
750 *ifap = ifa->if_next;
751 __in6_ifa_put(ifp);
752 ifa->if_next = NULL;
753 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
754 break;
755 deleted = 1;
1d142804 756 continue;
1da177e4
LT		 757 } else if (ifp->flags & IFA_F_PERMANENT) {
758 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
759 ifp->prefix_len)) {
760 if (ifa->flags & IFA_F_PERMANENT) {
761 onlink = 1;
762 if (deleted)
763 break;
764 } else {
765 unsigned long lifetime;
766
767 if (!onlink)
768 onlink = -1;
769
770 spin_lock(&ifa->lock);
4bed72e4
YH		 771
772 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
773 /*
774 * Note: Because this address is
775 * not permanent, lifetime <
776 * LONG_MAX / HZ here.
777 */
1da177e4
LT		 778 if (time_before(expires,
779 ifa->tstamp + lifetime * HZ))
780 expires = ifa->tstamp + lifetime * HZ;
781 spin_unlock(&ifa->lock);
782 }
783 }
784 }
1d142804 785 ifap = &ifa->if_next;
1da177e4
LT		 786 }
787 write_unlock_bh(&idev->lock);
788
b2238566
AV		 789 addrconf_del_timer(ifp);
790
1da177e4
LT		 791 ipv6_ifa_notify(RTM_DELADDR, ifp);
792
e041c683 793 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 794
1da177e4
LT		 795 /*
796 * Purge or update corresponding prefix
797 *
798 * 1) we don't purge prefix here if address was not permanent.
799 * prefix is managed by its own lifetime.
800 * 2) if there're no addresses, delete prefix.
801 * 3) if there're still other permanent address(es),
802 * corresponding prefix is still permanent.
803 * 4) otherwise, update prefix lifetime to the
804 * longest valid lifetime among the corresponding
805 * addresses on the device.
806 * Note: subsequent RA will update lifetime.
807 *
808 * --yoshfuji
809 */
810 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
811 struct in6_addr prefix;
812 struct rt6_info *rt;
c346dca1 813 struct net *net = dev_net(ifp->idev->dev);
1da177e4 814 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 815 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 816
2b5ead46 817 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 818 if (onlink == 0) {
e0a1ad73 819 ip6_del_rt(rt);
1da177e4
LT		 820 rt = NULL;
821 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
822 rt->rt6i_expires = expires;
823 rt->rt6i_flags |= RTF_EXPIRES;
824 }
825 }
826 dst_release(&rt->u.dst);
827 }
828
829 in6_ifa_put(ifp);
830}
831
832#ifdef CONFIG_IPV6_PRIVACY
833static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
834{
835 struct inet6_dev *idev = ifp->idev;
836 struct in6_addr addr, *tmpaddr;
837 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 838 unsigned long regen_advance;
1da177e4
LT		 839 int tmp_plen;
840 int ret = 0;
841 int max_addresses;
95c385b4 842 u32 addr_flags;
1da177e4
LT		 843
844 write_lock(&idev->lock);
845 if (ift) {
846 spin_lock_bh(&ift->lock);
847 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
848 spin_unlock_bh(&ift->lock);
849 tmpaddr = &addr;
850 } else {
851 tmpaddr = NULL;
852 }
853retry:
854 in6_dev_hold(idev);
855 if (idev->cnf.use_tempaddr <= 0) {
856 write_unlock(&idev->lock);
857 printk(KERN_INFO
858 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
859 in6_dev_put(idev);
860 ret = -1;
861 goto out;
862 }
863 spin_lock_bh(&ifp->lock);
864 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
865 idev->cnf.use_tempaddr = -1; /*XXX*/
866 spin_unlock_bh(&ifp->lock);
867 write_unlock(&idev->lock);
868 printk(KERN_WARNING
869 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
870 in6_dev_put(idev);
871 ret = -1;
872 goto out;
873 }
874 in6_ifa_hold(ifp);
875 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
876 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
877 spin_unlock_bh(&ifp->lock);
878 write_unlock(&idev->lock);
879 printk(KERN_WARNING
880 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
881 in6_ifa_put(ifp);
882 in6_dev_put(idev);
883 ret = -1;
884 goto out;
885 }
886 memcpy(&addr.s6_addr[8], idev->rndid, 8);
887 tmp_valid_lft = min_t(__u32,
888 ifp->valid_lft,
889 idev->cnf.temp_valid_lft);
1ab1457c
YH		 890 tmp_prefered_lft = min_t(__u32,
891 ifp->prefered_lft,
1da177e4
LT		 892 idev->cnf.temp_prefered_lft - desync_factor / HZ);
893 tmp_plen = ifp->prefix_len;
894 max_addresses = idev->cnf.max_addresses;
895 tmp_cstamp = ifp->cstamp;
896 tmp_tstamp = ifp->tstamp;
897 spin_unlock_bh(&ifp->lock);
898
eac55bf9
BB		 899 regen_advance = idev->cnf.regen_max_retry *
900 idev->cnf.dad_transmits *
901 idev->nd_parms->retrans_time / HZ;
1da177e4 902 write_unlock(&idev->lock);
95c385b4 903
eac55bf9
BB		 904 /* A temporary address is created only if this calculated Preferred
905 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
906 * an implementation must not create a temporary address with a zero
907 * Preferred Lifetime.
908 */
909 if (tmp_prefered_lft <= regen_advance) {
910 in6_ifa_put(ifp);
911 in6_dev_put(idev);
912 ret = -1;
913 goto out;
914 }
915
95c385b4
NH		 916 addr_flags = IFA_F_TEMPORARY;
917 /* set in addrconf_prefix_rcv() */
918 if (ifp->flags & IFA_F_OPTIMISTIC)
919 addr_flags |= IFA_F_OPTIMISTIC;
920
1da177e4 921 ift = !max_addresses ||
1ab1457c 922 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 923 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 924 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
925 addr_flags) : NULL;
1da177e4
LT		 926 if (!ift || IS_ERR(ift)) {
927 in6_ifa_put(ifp);
928 in6_dev_put(idev);
929 printk(KERN_INFO
930 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
931 tmpaddr = &addr;
932 write_lock(&idev->lock);
933 goto retry;
934 }
935
936 spin_lock_bh(&ift->lock);
937 ift->ifpub = ifp;
938 ift->valid_lft = tmp_valid_lft;
939 ift->prefered_lft = tmp_prefered_lft;
940 ift->cstamp = tmp_cstamp;
941 ift->tstamp = tmp_tstamp;
942 spin_unlock_bh(&ift->lock);
943
944 addrconf_dad_start(ift, 0);
945 in6_ifa_put(ift);
946 in6_dev_put(idev);
947out:
948 return ret;
949}
950#endif
951
952/*
072047e4 953 * Choose an appropriate source address (RFC3484)
1da177e4 954 */
a9b05723
YH		 955enum {
956 IPV6_SADDR_RULE_INIT = 0,
957 IPV6_SADDR_RULE_LOCAL,
958 IPV6_SADDR_RULE_SCOPE,
959 IPV6_SADDR_RULE_PREFERRED,
960#ifdef CONFIG_IPV6_MIP6
961 IPV6_SADDR_RULE_HOA,
962#endif
963 IPV6_SADDR_RULE_OIF,
964 IPV6_SADDR_RULE_LABEL,
965#ifdef CONFIG_IPV6_PRIVACY
966 IPV6_SADDR_RULE_PRIVACY,
967#endif
968 IPV6_SADDR_RULE_ORCHID,
969 IPV6_SADDR_RULE_PREFIX,
970 IPV6_SADDR_RULE_MAX
971};
972
072047e4 973struct ipv6_saddr_score {
a9b05723
YH		 974 int rule;
975 int addr_type;
976 struct inet6_ifaddr *ifa;
977 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
978 int scopedist;
979 int matchlen;
072047e4
YH		 980};
981
a9b05723 982struct ipv6_saddr_dst {
9acd9f3a 983 const struct in6_addr *addr;
a9b05723
YH		 984 int ifindex;
985 int scope;
986 int label;
7cbca67c 987 unsigned int prefs;
a9b05723 988};
072047e4 989
b6f99a21 990static inline int ipv6_saddr_preferred(int type)
1da177e4 991{
072047e4
YH		 992 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
993 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
994 return 1;
995 return 0;
1da177e4
LT		 996}
997
3de23255
BT		 998static int ipv6_get_saddr_eval(struct net *net,
999 struct ipv6_saddr_score *score,
a9b05723
YH		 1000 struct ipv6_saddr_dst *dst,
1001 int i)
1002{
1003 int ret;
1004
1005 if (i <= score->rule) {
1006 switch (i) {
1007 case IPV6_SADDR_RULE_SCOPE:
1008 ret = score->scopedist;
1009 break;
1010 case IPV6_SADDR_RULE_PREFIX:
1011 ret = score->matchlen;
1012 break;
1013 default:
1014 ret = !!test_bit(i, score->scorebits);
1015 }
1016 goto out;
1017 }
1018
1019 switch (i) {
1020 case IPV6_SADDR_RULE_INIT:
1021 /* Rule 0: remember if hiscore is not ready yet */
1022 ret = !!score->ifa;
1023 break;
1024 case IPV6_SADDR_RULE_LOCAL:
1025 /* Rule 1: Prefer same address */
1026 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1027 break;
1028 case IPV6_SADDR_RULE_SCOPE:
1029 /* Rule 2: Prefer appropriate scope
1030 *
1031 * ret
1032 * ^
1033 * -1 | d 15
1034 * ---+--+-+---> scope
1035 * |
1036 * | d is scope of the destination.
1037 * B-d | \
1038 * | \ <- smaller scope is better if
1039 * B-15 | \ if scope is enough for destinaion.
1040 * | ret = B - scope (-1 <= scope >= d <= 15).
1041 * d-C-1 | /
1042 * |/ <- greater is better
1043 * -C / if scope is not enough for destination.
1044 * /| ret = scope - C (-1 <= d < scope <= 15).
1045 *
1046 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1047 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1048 * Assume B = 0 and we get C > 29.
1049 */
1050 ret = __ipv6_addr_src_scope(score->addr_type);
1051 if (ret >= dst->scope)
1052 ret = -ret;
1053 else
1054 ret -= 128; /* 30 is enough */
1055 score->scopedist = ret;
1056 break;
1057 case IPV6_SADDR_RULE_PREFERRED:
1058 /* Rule 3: Avoid deprecated and optimistic addresses */
1059 ret = ipv6_saddr_preferred(score->addr_type) ||
1060 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1061 break;
1062#ifdef CONFIG_IPV6_MIP6
1063 case IPV6_SADDR_RULE_HOA:
7cbca67c 1064 {
a9b05723 1065 /* Rule 4: Prefer home address */
7cbca67c
YH		 1066 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1067 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1068 break;
7cbca67c 1069 }
a9b05723
YH		 1070#endif
1071 case IPV6_SADDR_RULE_OIF:
1072 /* Rule 5: Prefer outgoing interface */
1073 ret = (!dst->ifindex ||
1074 dst->ifindex == score->ifa->idev->dev->ifindex);
1075 break;
1076 case IPV6_SADDR_RULE_LABEL:
1077 /* Rule 6: Prefer matching label */
3de23255
BT		 1078 ret = ipv6_addr_label(net,
1079 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1080 score->ifa->idev->dev->ifindex) == dst->label;
1081 break;
1082#ifdef CONFIG_IPV6_PRIVACY
1083 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1084 {
a9b05723
YH		 1085 /* Rule 7: Prefer public address
1086 * Note: prefer temprary address if use_tempaddr >= 2
1087 */
7cbca67c
YH		 1088 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1089 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1090 score->ifa->idev->cnf.use_tempaddr >= 2;
1091 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1092 break;
7cbca67c 1093 }
a9b05723
YH		 1094#endif
1095 case IPV6_SADDR_RULE_ORCHID:
1096 /* Rule 8-: Prefer ORCHID vs ORCHID or
1097 * non-ORCHID vs non-ORCHID
1098 */
1099 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1100 ipv6_addr_orchid(dst->addr));
1101 break;
1102 case IPV6_SADDR_RULE_PREFIX:
1103 /* Rule 8: Use longest matching prefix */
1104 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1105 dst->addr);
1106 break;
1107 default:
1108 ret = 0;
1109 }
1110
1111 if (ret)
1112 __set_bit(i, score->scorebits);
1113 score->rule = i;
1114out:
1115 return ret;
1116}
1117
191cd582 1118int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
9acd9f3a 1119 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1120 struct in6_addr *saddr)
1da177e4 1121{
a9b05723
YH		 1122 struct ipv6_saddr_score scores[2],
1123 *score = &scores[0], *hiscore = &scores[1];
a9b05723 1124 struct ipv6_saddr_dst dst;
072047e4 1125 struct net_device *dev;
a9b05723 1126 int dst_type;
1da177e4 1127
a9b05723
YH		 1128 dst_type = __ipv6_addr_type(daddr);
1129 dst.addr = daddr;
1130 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1131 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1132 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1133 dst.prefs = prefs;
a9b05723
YH		 1134
1135 hiscore->rule = -1;
1136 hiscore->ifa = NULL;
1da177e4 1137
072047e4 1138 read_lock(&dev_base_lock);
8814c4b5 1139 rcu_read_lock();
1da177e4 1140
6fda7350 1141 for_each_netdev(net, dev) {
072047e4 1142 struct inet6_dev *idev;
072047e4 1143
a9b05723 1144 /* Candidate Source Address (section 4)
072047e4
YH		 1145 * - multicast and link-local destination address,
1146 * the set of candidate source address MUST only
1147 * include addresses assigned to interfaces
1148 * belonging to the same link as the outgoing
1149 * interface.
1150 * (- For site-local destination addresses, the
1151 * set of candidate source addresses MUST only
1152 * include addresses assigned to interfaces
1153 * belonging to the same site as the outgoing
1154 * interface.)
1155 */
a9b05723
YH		 1156 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1157 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1158 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1159 continue;
1da177e4 1160
1da177e4 1161 idev = __in6_dev_get(dev);
072047e4
YH		 1162 if (!idev)
1163 continue;
1164
1165 read_lock_bh(&idev->lock);
a9b05723
YH		 1166 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1167 int i;
072047e4 1168
a9b05723 1169 /*
6b3ae80a
YH		 1170 * - Tentative Address (RFC2462 section 5.4)
1171 * - A tentative address is not considered
1172 * "assigned to an interface" in the traditional
95c385b4 1173 * sense, unless it is also flagged as optimistic.
6b3ae80a 1174 * - Candidate Source Address (section 4)
072047e4
YH		 1175 * - In any case, anycast addresses, multicast
1176 * addresses, and the unspecified address MUST
1177 * NOT be included in a candidate set.
1178 */
a9b05723
YH		 1179 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1180 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1181 continue;
a9b05723
YH		 1182
1183 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1184
1185 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1186 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1187 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1188 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1189 "assigned as unicast address on %s",
1190 dev->name);
1191 continue;
1192 }
1193
a9b05723
YH		 1194 score->rule = -1;
1195 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1196
1197 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1198 int minihiscore, miniscore;
1199
3de23255
BT		 1200 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1201 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1202
1203 if (minihiscore > miniscore) {
1204 if (i == IPV6_SADDR_RULE_SCOPE &&
1205 score->scopedist > 0) {
1206 /*
1207 * special case:
1208 * each remaining entry
1209 * has too small (not enough)
1210 * scope, because ifa entries
1211 * are sorted by their scope
1212 * values.
1213 */
1214 goto try_nextdev;
1215 }
1216 break;
1217 } else if (minihiscore < miniscore) {
a9b05723
YH		 1218 if (hiscore->ifa)
1219 in6_ifa_put(hiscore->ifa);
1220
1221 in6_ifa_hold(score->ifa);
1222
a0bffffc 1223 swap(hiscore, score);
a9b05723
YH		 1224
1225 /* restore our iterator */
1226 score->ifa = hiscore->ifa;
1227
1228 break;
1da177e4 1229 }
072047e4 1230 }
1da177e4 1231 }
a9b05723 1232try_nextdev:
072047e4 1233 read_unlock_bh(&idev->lock);
1da177e4 1234 }
8814c4b5 1235 rcu_read_unlock();
1da177e4
LT		 1236 read_unlock(&dev_base_lock);
1237
a9b05723 1238 if (!hiscore->ifa)
072047e4 1239 return -EADDRNOTAVAIL;
1ab1457c 1240
a9b05723
YH		 1241 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1242 in6_ifa_put(hiscore->ifa);
072047e4 1243 return 0;
1da177e4
LT		 1244}
1245
5e5f3f0f 1246EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1247
95c385b4
NH		 1248int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1249 unsigned char banned_flags)
1da177e4
LT		 1250{
1251 struct inet6_dev *idev;
1252 int err = -EADDRNOTAVAIL;
1253
8814c4b5 1254 rcu_read_lock();
1da177e4
LT		 1255 if ((idev = __in6_dev_get(dev)) != NULL) {
1256 struct inet6_ifaddr *ifp;
1257
1258 read_lock_bh(&idev->lock);
1259 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1260 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1261 ipv6_addr_copy(addr, &ifp->addr);
1262 err = 0;
1263 break;
1264 }
1265 }
1266 read_unlock_bh(&idev->lock);
1267 }
8814c4b5 1268 rcu_read_unlock();
1da177e4
LT		 1269 return err;
1270}
1271
1272static int ipv6_count_addresses(struct inet6_dev *idev)
1273{
1274 int cnt = 0;
1275 struct inet6_ifaddr *ifp;
1276
1277 read_lock_bh(&idev->lock);
1278 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1279 cnt++;
1280 read_unlock_bh(&idev->lock);
1281 return cnt;
1282}
1283
bfeade08
DL		 1284int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1285 struct net_device *dev, int strict)
1da177e4
LT		 1286{
1287 struct inet6_ifaddr * ifp;
1288 u8 hash = ipv6_addr_hash(addr);
1289
1290 read_lock_bh(&addrconf_hash_lock);
1291 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1292 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1293 continue;
1da177e4
LT		 1294 if (ipv6_addr_equal(&ifp->addr, addr) &&
1295 !(ifp->flags&IFA_F_TENTATIVE)) {
1296 if (dev == NULL || ifp->idev->dev == dev ||
1297 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1298 break;
1299 }
1300 }
1301 read_unlock_bh(&addrconf_hash_lock);
1302 return ifp != NULL;
1303}
7159039a
YH		 1304EXPORT_SYMBOL(ipv6_chk_addr);
1305
1da177e4 1306static
06bfe655
DL		 1307int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1308 struct net_device *dev)
1da177e4
LT		 1309{
1310 struct inet6_ifaddr * ifp;
1311 u8 hash = ipv6_addr_hash(addr);
1312
1313 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1314 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1315 continue;
1da177e4
LT		 1316 if (ipv6_addr_equal(&ifp->addr, addr)) {
1317 if (dev == NULL || ifp->idev->dev == dev)
1318 break;
1319 }
1320 }
1321 return ifp != NULL;
1322}
1323
52eeeb84
YH		 1324int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1325{
1326 struct inet6_dev *idev;
1327 struct inet6_ifaddr *ifa;
1328 int onlink;
1329
1330 onlink = 0;
1331 rcu_read_lock();
1332 idev = __in6_dev_get(dev);
1333 if (idev) {
1334 read_lock_bh(&idev->lock);
1335 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1336 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1337 ifa->prefix_len);
1338 if (onlink)
1339 break;
1340 }
1341 read_unlock_bh(&idev->lock);
1342 }
1343 rcu_read_unlock();
1344 return onlink;
1345}
1346
1347EXPORT_SYMBOL(ipv6_chk_prefix);
1348
9acd9f3a 1349struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1350 struct net_device *dev, int strict)
1da177e4
LT		 1351{
1352 struct inet6_ifaddr * ifp;
1353 u8 hash = ipv6_addr_hash(addr);
1354
1355 read_lock_bh(&addrconf_hash_lock);
1356 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1357 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1358 continue;
1da177e4
LT		 1359 if (ipv6_addr_equal(&ifp->addr, addr)) {
1360 if (dev == NULL || ifp->idev->dev == dev ||
1361 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1362 in6_ifa_hold(ifp);
1363 break;
1364 }
1365 }
1366 }
1367 read_unlock_bh(&addrconf_hash_lock);
1368
1369 return ifp;
1370}
1371
1da177e4
LT		 1372/* Gets referenced address, destroys ifaddr */
1373
9f5336e2 1374static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1375{
1da177e4
LT		 1376 if (ifp->flags&IFA_F_PERMANENT) {
1377 spin_lock_bh(&ifp->lock);
1378 addrconf_del_timer(ifp);
1379 ifp->flags |= IFA_F_TENTATIVE;
1380 spin_unlock_bh(&ifp->lock);
1381 in6_ifa_put(ifp);
1382#ifdef CONFIG_IPV6_PRIVACY
1383 } else if (ifp->flags&IFA_F_TEMPORARY) {
1384 struct inet6_ifaddr *ifpub;
1385 spin_lock_bh(&ifp->lock);
1386 ifpub = ifp->ifpub;
1387 if (ifpub) {
1388 in6_ifa_hold(ifpub);
1389 spin_unlock_bh(&ifp->lock);
1390 ipv6_create_tempaddr(ifpub, ifp);
1391 in6_ifa_put(ifpub);
1392 } else {
1393 spin_unlock_bh(&ifp->lock);
1394 }
1395 ipv6_del_addr(ifp);
1396#endif
1397 } else
1398 ipv6_del_addr(ifp);
1399}
1400
3c21edbd
YH		 1401void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1402{
1b34be74 1403 struct inet6_dev *idev = ifp->idev;
9bdd8d40
BH		 1404
1405 if (net_ratelimit())
1406 printk(KERN_INFO "%s: IPv6 duplicate address detected!\n",
1407 ifp->idev->dev->name);
1408
1b34be74
YH		 1409 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1410 struct in6_addr addr;
1411
1412 addr.s6_addr32[0] = htonl(0xfe800000);
1413 addr.s6_addr32[1] = 0;
1414
1415 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1416 ipv6_addr_equal(&ifp->addr, &addr)) {
1417 /* DAD failed for link-local based on MAC address */
1418 idev->cnf.disable_ipv6 = 1;
9bdd8d40
BH		 1419
1420 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1421 ifp->idev->dev->name);
1b34be74
YH		 1422 }
1423 }
1424
3c21edbd
YH		 1425 addrconf_dad_stop(ifp);
1426}
1da177e4
LT		 1427
1428/* Join to solicited addr multicast group. */
1429
1430void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1431{
1432 struct in6_addr maddr;
1433
1434 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1435 return;
1436
1437 addrconf_addr_solict_mult(addr, &maddr);
1438 ipv6_dev_mc_inc(dev, &maddr);
1439}
1440
1441void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1442{
1443 struct in6_addr maddr;
1444
1445 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1446 return;
1447
1448 addrconf_addr_solict_mult(addr, &maddr);
1449 __ipv6_dev_mc_dec(idev, &maddr);
1450}
1451
20380731 1452static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1453{
1454 struct in6_addr addr;
1455 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1456 if (ipv6_addr_any(&addr))
1457 return;
1458 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1459}
1460
20380731 1461static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1462{
1463 struct in6_addr addr;
1464 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1465 if (ipv6_addr_any(&addr))
1466 return;
1467 __ipv6_dev_ac_dec(ifp->idev, &addr);
1468}
1469
073a8e0e
YH		 1470static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1471{
1472 if (dev->addr_len != ETH_ALEN)
1473 return -1;
1474 memcpy(eui, dev->dev_addr, 3);
1475 memcpy(eui + 5, dev->dev_addr + 3, 3);
1476
1477 /*
1478 * The zSeries OSA network cards can be shared among various
1479 * OS instances, but the OSA cards have only one MAC address.
1480 * This leads to duplicate address conflicts in conjunction
1481 * with IPv6 if more than one instance uses the same card.
1482 *
1483 * The driver for these cards can deliver a unique 16-bit
1484 * identifier for each instance sharing the same card. It is
1485 * placed instead of 0xFFFE in the interface identifier. The
1486 * "u" bit of the interface identifier is not inverted in this
1487 * case. Hence the resulting interface identifier has local
1488 * scope according to RFC2373.
1489 */
1490 if (dev->dev_id) {
1491 eui[3] = (dev->dev_id >> 8) & 0xFF;
1492 eui[4] = dev->dev_id & 0xFF;
1493 } else {
1494 eui[3] = 0xFF;
1495 eui[4] = 0xFE;
1496 eui[0] ^= 2;
1497 }
1498 return 0;
1499}
1500
1501static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1502{
1503 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1504 if (dev->addr_len != ARCNET_ALEN)
1505 return -1;
1506 memset(eui, 0, 7);
1507 eui[7] = *(u8*)dev->dev_addr;
1508 return 0;
1509}
1510
1511static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1512{
1513 if (dev->addr_len != INFINIBAND_ALEN)
1514 return -1;
1515 memcpy(eui, dev->dev_addr + 12, 8);
1516 eui[0] |= 2;
1517 return 0;
1518}
1519
dfd982ba
YH		 1520int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1521{
9af28511
SH		 1522 if (addr == 0)
1523 return -1;
dfd982ba
YH		 1524 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1525 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1526 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1527 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1528 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1529 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1530 eui[1] = 0;
1531 eui[2] = 0x5E;
1532 eui[3] = 0xFE;
1533 memcpy(eui + 4, &addr, 4);
1534 return 0;
1535}
1536EXPORT_SYMBOL(__ipv6_isatap_ifid);
1537
1538static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1539{
1540 if (dev->priv_flags & IFF_ISATAP)
1541 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1542 return -1;
1543}
1544
1da177e4
LT		 1545static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1546{
1547 switch (dev->type) {
1548 case ARPHRD_ETHER:
1549 case ARPHRD_FDDI:
1550 case ARPHRD_IEEE802_TR:
073a8e0e 1551 return addrconf_ifid_eui48(eui, dev);
1da177e4 1552 case ARPHRD_ARCNET:
073a8e0e 1553 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1554 case ARPHRD_INFINIBAND:
073a8e0e 1555 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1556 case ARPHRD_SIT:
dfd982ba 1557 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1558 }
1559 return -1;
1560}
1561
1562static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1563{
1564 int err = -1;
1565 struct inet6_ifaddr *ifp;
1566
1567 read_lock_bh(&idev->lock);
1568 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1569 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1570 memcpy(eui, ifp->addr.s6_addr+8, 8);
1571 err = 0;
1572 break;
1573 }
1574 }
1575 read_unlock_bh(&idev->lock);
1576 return err;
1577}
1578
1579#ifdef CONFIG_IPV6_PRIVACY
1580/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1581static int __ipv6_regen_rndid(struct inet6_dev *idev)
1582{
1da177e4 1583regen:
955189ef 1584 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1585 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1586
1587 /*
1588 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1589 * check if generated address is not inappropriate
1590 *
1591 * - Reserved subnet anycast (RFC 2526)
1592 * 11111101 11....11 1xxxxxxx
c7dc89c0 1593 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1594 * 00-00-5E-FE-xx-xx-xx-xx
1595 * - value 0
1596 * - XXX: already assigned to an address on the device
1597 */
1ab1457c 1598 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1599 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1600 (idev->rndid[7]&0x80))
1601 goto regen;
1602 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1603 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1604 goto regen;
1605 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1606 goto regen;
1607 }
1608
1609 return 0;
1610}
1611
1612static void ipv6_regen_rndid(unsigned long data)
1613{
1614 struct inet6_dev *idev = (struct inet6_dev *) data;
1615 unsigned long expires;
1616
8814c4b5 1617 rcu_read_lock_bh();
1da177e4
LT		 1618 write_lock_bh(&idev->lock);
1619
1620 if (idev->dead)
1621 goto out;
1622
1623 if (__ipv6_regen_rndid(idev) < 0)
1624 goto out;
1ab1457c 1625
1da177e4 1626 expires = jiffies +
1ab1457c 1627 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1628 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1629 if (time_before(expires, jiffies)) {
1630 printk(KERN_WARNING
1631 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1632 idev->dev->name);
1633 goto out;
1634 }
1635
1636 if (!mod_timer(&idev->regen_timer, expires))
1637 in6_dev_hold(idev);
1638
1639out:
1640 write_unlock_bh(&idev->lock);
8814c4b5 1641 rcu_read_unlock_bh();
1da177e4
LT		 1642 in6_dev_put(idev);
1643}
1644
1645static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1646 int ret = 0;
1647
1648 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1649 ret = __ipv6_regen_rndid(idev);
1650 return ret;
1651}
1652#endif
1653
1654/*
1655 * Add prefix route.
1656 */
1657
1658static void
1659addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1660 unsigned long expires, u32 flags)
1da177e4 1661{
86872cb5
TG		 1662 struct fib6_config cfg = {
1663 .fc_table = RT6_TABLE_PREFIX,
1664 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1665 .fc_ifindex = dev->ifindex,
1666 .fc_expires = expires,
1667 .fc_dst_len = plen,
1668 .fc_flags = RTF_UP | flags,
c346dca1 1669 .fc_nlinfo.nl_net = dev_net(dev),
f410a1fb 1670 .fc_protocol = RTPROT_KERNEL,
86872cb5 1671 };
1da177e4 1672
86872cb5 1673 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1674
1675 /* Prevent useless cloning on PtP SIT.
1676 This thing is done here expecting that the whole
1677 class of non-broadcast devices need not cloning.
1678 */
0be669bb 1679#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1680 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1681 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1682#endif
1da177e4 1683
86872cb5 1684 ip6_route_add(&cfg);
1da177e4
LT		 1685}
1686
1687/* Create "default" multicast route to the interface */
1688
1689static void addrconf_add_mroute(struct net_device *dev)
1690{
86872cb5
TG		 1691 struct fib6_config cfg = {
1692 .fc_table = RT6_TABLE_LOCAL,
1693 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1694 .fc_ifindex = dev->ifindex,
1695 .fc_dst_len = 8,
1696 .fc_flags = RTF_UP,
c346dca1 1697 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1698 };
1699
1700 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1701
1702 ip6_route_add(&cfg);
1da177e4
LT		 1703}
1704
0be669bb 1705#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1706static void sit_route_add(struct net_device *dev)
1707{
86872cb5
TG		 1708 struct fib6_config cfg = {
1709 .fc_table = RT6_TABLE_MAIN,
1710 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1711 .fc_ifindex = dev->ifindex,
1712 .fc_dst_len = 96,
1713 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1714 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1715 };
1da177e4
LT		 1716
1717 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1718 ip6_route_add(&cfg);
1da177e4 1719}
0be669bb 1720#endif
1da177e4
LT		 1721
1722static void addrconf_add_lroute(struct net_device *dev)
1723{
1724 struct in6_addr addr;
1725
1726 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1727 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1728}
1729
1730static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1731{
1732 struct inet6_dev *idev;
1733
1734 ASSERT_RTNL();
1735
1736 if ((idev = ipv6_find_idev(dev)) == NULL)
1737 return NULL;
1738
1739 /* Add default multicast route */
1740 addrconf_add_mroute(dev);
1741
1742 /* Add link local route */
1743 addrconf_add_lroute(dev);
1744 return idev;
1745}
1746
1747void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1748{
1749 struct prefix_info *pinfo;
1750 __u32 valid_lft;
1751 __u32 prefered_lft;
1752 int addr_type;
1da177e4 1753 struct inet6_dev *in6_dev;
56d417b1 1754 struct net *net = dev_net(dev);
1da177e4
LT		 1755
1756 pinfo = (struct prefix_info *) opt;
1ab1457c 1757
1da177e4
LT		 1758 if (len < sizeof(struct prefix_info)) {
1759 ADBG(("addrconf: prefix option too short\n"));
1760 return;
1761 }
1ab1457c 1762
1da177e4
LT		 1763 /*
1764 * Validation checks ([ADDRCONF], page 19)
1765 */
1766
1767 addr_type = ipv6_addr_type(&pinfo->prefix);
1768
1769 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1770 return;
1771
1772 valid_lft = ntohl(pinfo->valid);
1773 prefered_lft = ntohl(pinfo->prefered);
1774
1775 if (prefered_lft > valid_lft) {
1776 if (net_ratelimit())
1777 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1778 return;
1779 }
1780
1781 in6_dev = in6_dev_get(dev);
1782
1783 if (in6_dev == NULL) {
1784 if (net_ratelimit())
1785 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1786 return;
1787 }
1788
1789 /*
1790 * Two things going on here:
1791 * 1) Add routes for on-link prefixes
1792 * 2) Configure prefixes with the auto flag set
1793 */
1794
4bed72e4
YH		 1795 if (pinfo->onlink) {
1796 struct rt6_info *rt;
1797 unsigned long rt_expires;
1798
6f704992
YH		 1799 /* Avoid arithmetic overflow. Really, we could
1800 * save rt_expires in seconds, likely valid_lft,
1801 * but it would require division in fib gc, that it
1802 * not good.
1803 */
4bed72e4
YH		 1804 if (HZ > USER_HZ)
1805 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1806 else
1807 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1808
4bed72e4
YH		 1809 if (addrconf_finite_timeout(rt_expires))
1810 rt_expires *= HZ;
1da177e4 1811
56d417b1 1812 rt = rt6_lookup(net, &pinfo->prefix, NULL,
6fda7350 1813 dev->ifindex, 1);
1da177e4 1814
2b5ead46 1815 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1816 /* Autoconf prefix route */
1817 if (valid_lft == 0) {
1818 ip6_del_rt(rt);
1819 rt = NULL;
4bed72e4 1820 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1821 /* not infinity */
1822 rt->rt6i_expires = jiffies + rt_expires;
1823 rt->rt6i_flags |= RTF_EXPIRES;
1824 } else {
1825 rt->rt6i_flags &= ~RTF_EXPIRES;
1826 rt->rt6i_expires = 0;
1da177e4
LT		 1827 }
1828 } else if (valid_lft) {
6f704992 1829 clock_t expires = 0;
4bed72e4
YH		 1830 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1831 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1832 /* not infinity */
1833 flags |= RTF_EXPIRES;
1834 expires = jiffies_to_clock_t(rt_expires);
1835 }
1da177e4 1836 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1837 dev, expires, flags);
1da177e4
LT		 1838 }
1839 if (rt)
1840 dst_release(&rt->u.dst);
1841 }
1842
1843 /* Try to figure out our local address for this prefix */
1844
1845 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1846 struct inet6_ifaddr * ifp;
1847 struct in6_addr addr;
1848 int create = 0, update_lft = 0;
1849
1850 if (pinfo->prefix_len == 64) {
1851 memcpy(&addr, &pinfo->prefix, 8);
1852 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1853 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1854 in6_dev_put(in6_dev);
1855 return;
1856 }
1857 goto ok;
1858 }
1859 if (net_ratelimit())
1860 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1861 pinfo->prefix_len);
1862 in6_dev_put(in6_dev);
1863 return;
1864
1865ok:
1866
53b7997f 1867 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1868
1869 if (ifp == NULL && valid_lft) {
1870 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1871 u32 addr_flags = 0;
1872
1873#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1874 if (in6_dev->cnf.optimistic_dad &&
53b7997f 1875 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 1876 addr_flags = IFA_F_OPTIMISTIC;
1877#endif
1da177e4
LT		 1878
1879 /* Do not allow to create too much of autoconfigured
1880 * addresses; this would be too easy way to crash kernel.
1881 */
1882 if (!max_addresses ||
1883 ipv6_count_addresses(in6_dev) < max_addresses)
1884 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1885 addr_type&IPV6_ADDR_SCOPE_MASK,
1886 addr_flags);
1da177e4
LT		 1887
1888 if (!ifp || IS_ERR(ifp)) {
1889 in6_dev_put(in6_dev);
1890 return;
1891 }
1892
1893 update_lft = create = 1;
1894 ifp->cstamp = jiffies;
1895 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1896 }
1897
1898 if (ifp) {
1899 int flags;
1900 unsigned long now;
1901#ifdef CONFIG_IPV6_PRIVACY
1902 struct inet6_ifaddr *ift;
1903#endif
1904 u32 stored_lft;
1905
1906 /* update lifetime (RFC2462 5.5.3 e) */
1907 spin_lock(&ifp->lock);
1908 now = jiffies;
1909 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1910 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1911 else
1912 stored_lft = 0;
1913 if (!update_lft && stored_lft) {
1914 if (valid_lft > MIN_VALID_LIFETIME ||
1915 valid_lft > stored_lft)
1916 update_lft = 1;
1917 else if (stored_lft <= MIN_VALID_LIFETIME) {
1918 /* valid_lft <= stored_lft is always true */
1919 /* XXX: IPsec */
1920 update_lft = 0;
1921 } else {
1922 valid_lft = MIN_VALID_LIFETIME;
1923 if (valid_lft < prefered_lft)
1924 prefered_lft = valid_lft;
1925 update_lft = 1;
1926 }
1927 }
1928
1929 if (update_lft) {
1930 ifp->valid_lft = valid_lft;
1931 ifp->prefered_lft = prefered_lft;
1932 ifp->tstamp = now;
1933 flags = ifp->flags;
1934 ifp->flags &= ~IFA_F_DEPRECATED;
1935 spin_unlock(&ifp->lock);
1936
1937 if (!(flags&IFA_F_TENTATIVE))
1938 ipv6_ifa_notify(0, ifp);
1939 } else
1940 spin_unlock(&ifp->lock);
1941
1942#ifdef CONFIG_IPV6_PRIVACY
1943 read_lock_bh(&in6_dev->lock);
1944 /* update all temporary addresses in the list */
1945 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1946 /*
1947 * When adjusting the lifetimes of an existing
1948 * temporary address, only lower the lifetimes.
1949 * Implementations must not increase the
1950 * lifetimes of an existing temporary address
1951 * when processing a Prefix Information Option.
1952 */
c6fbfac2
BB		 1953 if (ifp != ift->ifpub)
1954 continue;
1955
1da177e4
LT		 1956 spin_lock(&ift->lock);
1957 flags = ift->flags;
1958 if (ift->valid_lft > valid_lft &&
1959 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1960 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1961 if (ift->prefered_lft > prefered_lft &&
1962 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1963 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1964 spin_unlock(&ift->lock);
1965 if (!(flags&IFA_F_TENTATIVE))
1966 ipv6_ifa_notify(0, ift);
1967 }
1968
1969 if (create && in6_dev->cnf.use_tempaddr > 0) {
1970 /*
1971 * When a new public address is created as described in [ADDRCONF],
1972 * also create a new temporary address.
1973 */
1ab1457c 1974 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1975 ipv6_create_tempaddr(ifp, NULL);
1976 } else {
1977 read_unlock_bh(&in6_dev->lock);
1978 }
1979#endif
1980 in6_ifa_put(ifp);
1981 addrconf_verify(0);
1982 }
1983 }
1984 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1985 in6_dev_put(in6_dev);
1986}
1987
1988/*
1989 * Set destination address.
1990 * Special case for SIT interfaces where we create a new "virtual"
1991 * device.
1992 */
af284937 1993int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 1994{
1995 struct in6_ifreq ireq;
1996 struct net_device *dev;
1997 int err = -EINVAL;
1998
1999 rtnl_lock();
2000
2001 err = -EFAULT;
2002 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2003 goto err_exit;
2004
af284937 2005 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2006
2007 err = -ENODEV;
2008 if (dev == NULL)
2009 goto err_exit;
2010
0be669bb 2011#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4 2012 if (dev->type == ARPHRD_SIT) {
5bc3eb7e 2013 const struct net_device_ops *ops = dev->netdev_ops;
1da177e4 2014 struct ifreq ifr;
1da177e4
LT		 2015 struct ip_tunnel_parm p;
2016
2017 err = -EADDRNOTAVAIL;
2018 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2019 goto err_exit;
2020
2021 memset(&p, 0, sizeof(p));
2022 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2023 p.iph.saddr = 0;
2024 p.iph.version = 4;
2025 p.iph.ihl = 5;
2026 p.iph.protocol = IPPROTO_IPV6;
2027 p.iph.ttl = 64;
d20b3109 2028 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4 2029
5bc3eb7e
SH		 2030 if (ops->ndo_do_ioctl) {
2031 mm_segment_t oldfs = get_fs();
2032
2033 set_fs(KERNEL_DS);
2034 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2035 set_fs(oldfs);
2036 } else
2037 err = -EOPNOTSUPP;
1da177e4
LT		 2038
2039 if (err == 0) {
2040 err = -ENOBUFS;
af284937
DL		 2041 dev = __dev_get_by_name(net, p.name);
2042 if (!dev)
1da177e4
LT		 2043 goto err_exit;
2044 err = dev_open(dev);
2045 }
2046 }
0be669bb 2047#endif
1da177e4
LT		 2048
2049err_exit:
2050 rtnl_unlock();
2051 return err;
2052}
2053
2054/*
2055 * Manual configuration of address on an interface
2056 */
af284937 2057static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2058 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2059 __u32 valid_lft)
1da177e4
LT		 2060{
2061 struct inet6_ifaddr *ifp;
2062 struct inet6_dev *idev;
2063 struct net_device *dev;
2064 int scope;
6f704992
YH		 2065 u32 flags;
2066 clock_t expires;
4bed72e4 2067 unsigned long timeout;
1da177e4
LT		 2068
2069 ASSERT_RTNL();
1ab1457c 2070
24ef0da7
TG		 2071 if (plen > 128)
2072 return -EINVAL;
2073
0778769d
NT		 2074 /* check the lifetime */
2075 if (!valid_lft || prefered_lft > valid_lft)
2076 return -EINVAL;
2077
af284937
DL		 2078 dev = __dev_get_by_index(net, ifindex);
2079 if (!dev)
1da177e4 2080 return -ENODEV;
1ab1457c 2081
1da177e4
LT		 2082 if ((idev = addrconf_add_dev(dev)) == NULL)
2083 return -ENOBUFS;
2084
2085 scope = ipv6_addr_scope(pfx);
2086
4bed72e4
YH		 2087 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2088 if (addrconf_finite_timeout(timeout)) {
2089 expires = jiffies_to_clock_t(timeout * HZ);
2090 valid_lft = timeout;
6f704992 2091 flags = RTF_EXPIRES;
4bed72e4
YH		 2092 } else {
2093 expires = 0;
2094 flags = 0;
2095 ifa_flags |= IFA_F_PERMANENT;
6f704992 2096 }
0778769d 2097
4bed72e4
YH		 2098 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2099 if (addrconf_finite_timeout(timeout)) {
2100 if (timeout == 0)
2101 ifa_flags |= IFA_F_DEPRECATED;
2102 prefered_lft = timeout;
2103 }
0778769d
NT		 2104
2105 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2106
1da177e4 2107 if (!IS_ERR(ifp)) {
06aebfb7 2108 spin_lock_bh(&ifp->lock);
0778769d
NT		 2109 ifp->valid_lft = valid_lft;
2110 ifp->prefered_lft = prefered_lft;
2111 ifp->tstamp = jiffies;
06aebfb7 2112 spin_unlock_bh(&ifp->lock);
0778769d 2113
46d48046 2114 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2115 expires, flags);
95c385b4
NH		 2116 /*
2117 * Note that section 3.1 of RFC 4429 indicates
2118 * that the Optimistic flag should not be set for
2119 * manually configured addresses
2120 */
1da177e4
LT		 2121 addrconf_dad_start(ifp, 0);
2122 in6_ifa_put(ifp);
0778769d 2123 addrconf_verify(0);
1da177e4
LT		 2124 return 0;
2125 }
2126
2127 return PTR_ERR(ifp);
2128}
2129
af284937 2130static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2131 unsigned int plen)
1da177e4
LT		 2132{
2133 struct inet6_ifaddr *ifp;
2134 struct inet6_dev *idev;
2135 struct net_device *dev;
1ab1457c 2136
24ef0da7
TG		 2137 if (plen > 128)
2138 return -EINVAL;
2139
af284937
DL		 2140 dev = __dev_get_by_index(net, ifindex);
2141 if (!dev)
1da177e4
LT		 2142 return -ENODEV;
2143
2144 if ((idev = __in6_dev_get(dev)) == NULL)
2145 return -ENXIO;
2146
2147 read_lock_bh(&idev->lock);
2148 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2149 if (ifp->prefix_len == plen &&
2150 ipv6_addr_equal(pfx, &ifp->addr)) {
2151 in6_ifa_hold(ifp);
2152 read_unlock_bh(&idev->lock);
1ab1457c 2153
1da177e4
LT		 2154 ipv6_del_addr(ifp);
2155
2156 /* If the last address is deleted administratively,
2157 disable IPv6 on this interface.
2158 */
2159 if (idev->addr_list == NULL)
2160 addrconf_ifdown(idev->dev, 1);
2161 return 0;
2162 }
2163 }
2164 read_unlock_bh(&idev->lock);
2165 return -EADDRNOTAVAIL;
2166}
2167
2168
af284937 2169int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2170{
2171 struct in6_ifreq ireq;
2172 int err;
1ab1457c 2173
1da177e4
LT		 2174 if (!capable(CAP_NET_ADMIN))
2175 return -EPERM;
1ab1457c 2176
1da177e4
LT		 2177 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2178 return -EFAULT;
2179
2180 rtnl_lock();
af284937
DL		 2181 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2182 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2183 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2184 rtnl_unlock();
2185 return err;
2186}
2187
af284937 2188int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2189{
2190 struct in6_ifreq ireq;
2191 int err;
1ab1457c 2192
1da177e4
LT		 2193 if (!capable(CAP_NET_ADMIN))
2194 return -EPERM;
2195
2196 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2197 return -EFAULT;
2198
2199 rtnl_lock();
af284937
DL		 2200 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2201 ireq.ifr6_prefixlen);
1da177e4
LT		 2202 rtnl_unlock();
2203 return err;
2204}
2205
b5f348e5
IJ		 2206static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2207 int plen, int scope)
2208{
2209 struct inet6_ifaddr *ifp;
2210
2211 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2212 if (!IS_ERR(ifp)) {
2213 spin_lock_bh(&ifp->lock);
2214 ifp->flags &= ~IFA_F_TENTATIVE;
2215 spin_unlock_bh(&ifp->lock);
2216 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2217 in6_ifa_put(ifp);
2218 }
2219}
2220
0be669bb 2221#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2222static void sit_add_v4_addrs(struct inet6_dev *idev)
2223{
1da177e4
LT		 2224 struct in6_addr addr;
2225 struct net_device *dev;
c346dca1 2226 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2227 int scope;
2228
2229 ASSERT_RTNL();
2230
2231 memset(&addr, 0, sizeof(struct in6_addr));
2232 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2233
2234 if (idev->dev->flags&IFF_POINTOPOINT) {
2235 addr.s6_addr32[0] = htonl(0xfe800000);
2236 scope = IFA_LINK;
2237 } else {
2238 scope = IPV6_ADDR_COMPATv4;
2239 }
2240
2241 if (addr.s6_addr32[3]) {
b5f348e5 2242 add_addr(idev, &addr, 128, scope);
1da177e4
LT		 2243 return;
2244 }
2245
6fda7350 2246 for_each_netdev(net, dev) {
e5ed6399 2247 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2248 if (in_dev && (dev->flags & IFF_UP)) {
2249 struct in_ifaddr * ifa;
2250
2251 int flag = scope;
2252
2253 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2254 int plen;
2255
2256 addr.s6_addr32[3] = ifa->ifa_local;
2257
2258 if (ifa->ifa_scope == RT_SCOPE_LINK)
2259 continue;
2260 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2261 if (idev->dev->flags&IFF_POINTOPOINT)
2262 continue;
2263 flag |= IFA_HOST;
2264 }
2265 if (idev->dev->flags&IFF_POINTOPOINT)
2266 plen = 64;
2267 else
2268 plen = 96;
2269
b5f348e5 2270 add_addr(idev, &addr, plen, flag);
1da177e4
LT		 2271 }
2272 }
1ab1457c 2273 }
1da177e4 2274}
0be669bb 2275#endif
1da177e4
LT		 2276
2277static void init_loopback(struct net_device *dev)
2278{
2279 struct inet6_dev *idev;
1da177e4
LT		 2280
2281 /* ::1 */
2282
2283 ASSERT_RTNL();
2284
2285 if ((idev = ipv6_find_idev(dev)) == NULL) {
2286 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2287 return;
2288 }
2289
b5f348e5 2290 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
1da177e4
LT		 2291}
2292
2293static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2294{
2295 struct inet6_ifaddr * ifp;
95c385b4
NH		 2296 u32 addr_flags = IFA_F_PERMANENT;
2297
2298#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2299 if (idev->cnf.optimistic_dad &&
702beb87 2300 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
95c385b4
NH		 2301 addr_flags |= IFA_F_OPTIMISTIC;
2302#endif
1da177e4 2303
95c385b4
NH		 2304
2305 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2306 if (!IS_ERR(ifp)) {
46d48046 2307 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2308 addrconf_dad_start(ifp, 0);
2309 in6_ifa_put(ifp);
2310 }
2311}
2312
2313static void addrconf_dev_config(struct net_device *dev)
2314{
2315 struct in6_addr addr;
2316 struct inet6_dev * idev;
2317
2318 ASSERT_RTNL();
2319
74235a25
HX		 2320 if ((dev->type != ARPHRD_ETHER) &&
2321 (dev->type != ARPHRD_FDDI) &&
2322 (dev->type != ARPHRD_IEEE802_TR) &&
2323 (dev->type != ARPHRD_ARCNET) &&
2324 (dev->type != ARPHRD_INFINIBAND)) {
2325 /* Alas, we support only Ethernet autoconfiguration. */
2326 return;
2327 }
2328
1da177e4
LT		 2329 idev = addrconf_add_dev(dev);
2330 if (idev == NULL)
2331 return;
2332
2333 memset(&addr, 0, sizeof(struct in6_addr));
2334 addr.s6_addr32[0] = htonl(0xFE800000);
2335
2336 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2337 addrconf_add_linklocal(idev, &addr);
2338}
2339
0be669bb 2340#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2341static void addrconf_sit_config(struct net_device *dev)
2342{
2343 struct inet6_dev *idev;
2344
2345 ASSERT_RTNL();
2346
1ab1457c
YH		 2347 /*
2348 * Configure the tunnel with one of our IPv4
2349 * addresses... we should configure all of
1da177e4
LT		 2350 * our v4 addrs in the tunnel
2351 */
2352
2353 if ((idev = ipv6_find_idev(dev)) == NULL) {
2354 printk(KERN_DEBUG "init sit: add_dev failed\n");
2355 return;
2356 }
2357
c7dc89c0
FT		 2358 if (dev->priv_flags & IFF_ISATAP) {
2359 struct in6_addr addr;
2360
2361 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2362 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2363 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2364 addrconf_add_linklocal(idev, &addr);
2365 return;
2366 }
2367
1da177e4
LT		 2368 sit_add_v4_addrs(idev);
2369
2370 if (dev->flags&IFF_POINTOPOINT) {
2371 addrconf_add_mroute(dev);
2372 addrconf_add_lroute(dev);
2373 } else
2374 sit_route_add(dev);
2375}
0be669bb 2376#endif
1da177e4
LT		 2377
2378static inline int
2379ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2380{
2381 struct in6_addr lladdr;
2382
95c385b4 2383 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2384 addrconf_add_linklocal(idev, &lladdr);
2385 return 0;
2386 }
2387 return -1;
2388}
2389
2390static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2391{
2392 struct net_device *link_dev;
c346dca1 2393 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2394
2395 /* first try to inherit the link-local address from the link device */
2396 if (idev->dev->iflink &&
6fda7350 2397 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2398 if (!ipv6_inherit_linklocal(idev, link_dev))
2399 return;
2400 }
2401 /* then try to inherit it from any device */
6fda7350 2402 for_each_netdev(net, link_dev) {
1da177e4
LT		 2403 if (!ipv6_inherit_linklocal(idev, link_dev))
2404 return;
2405 }
2406 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2407}
2408
2409/*
2410 * Autoconfigure tunnel with a link-local address so routing protocols,
2411 * DHCPv6, MLD etc. can be run over the virtual link
2412 */
2413
2414static void addrconf_ip6_tnl_config(struct net_device *dev)
2415{
2416 struct inet6_dev *idev;
2417
2418 ASSERT_RTNL();
2419
2420 if ((idev = addrconf_add_dev(dev)) == NULL) {
2421 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2422 return;
2423 }
2424 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2425}
2426
1ab1457c 2427static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2428 void * data)
2429{
2430 struct net_device *dev = (struct net_device *) data;
74235a25 2431 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2432 int run_pending = 0;
b217d616 2433 int err;
1da177e4
LT		 2434
2435 switch(event) {
45ba9dd2 2436 case NETDEV_REGISTER:
74235a25 2437 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2438 idev = ipv6_add_dev(dev);
2439 if (!idev)
b217d616 2440 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2441 }
2442 break;
1da177e4 2443 case NETDEV_UP:
3c21edbd 2444 case NETDEV_CHANGE:
c2edacf8
JV		 2445 if (dev->flags & IFF_SLAVE)
2446 break;
2447
3c21edbd 2448 if (event == NETDEV_UP) {
f24e3d65 2449 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2450 /* device is not ready yet. */
2451 printk(KERN_INFO
2452 "ADDRCONF(NETDEV_UP): %s: "
2453 "link is not ready\n",
2454 dev->name);
2455 break;
2456 }
99081049 2457
d31c7b8f
EP		 2458 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2459 idev = ipv6_add_dev(dev);
2460
e3ec6cfc 2461 if (idev) {
99081049 2462 idev->if_flags |= IF_READY;
e3ec6cfc
BT		 2463 run_pending = 1;
2464 }
3c21edbd 2465 } else {
f24e3d65 2466 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2467 /* device is still not ready. */
2468 break;
2469 }
2470
2471 if (idev) {
2472 if (idev->if_flags & IF_READY) {
2473 /* device is already configured. */
2474 break;
2475 }
2476 idev->if_flags |= IF_READY;
2477 }
2478
2479 printk(KERN_INFO
2480 "ADDRCONF(NETDEV_CHANGE): %s: "
2481 "link becomes ready\n",
2482 dev->name);
2483
c5e33bdd 2484 run_pending = 1;
3c21edbd
YH		 2485 }
2486
1da177e4 2487 switch(dev->type) {
0be669bb 2488#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2489 case ARPHRD_SIT:
2490 addrconf_sit_config(dev);
2491 break;
0be669bb 2492#endif
1da177e4
LT		 2493 case ARPHRD_TUNNEL6:
2494 addrconf_ip6_tnl_config(dev);
2495 break;
2496 case ARPHRD_LOOPBACK:
2497 init_loopback(dev);
2498 break;
2499
2500 default:
2501 addrconf_dev_config(dev);
2502 break;
3ff50b79 2503 }
1da177e4 2504 if (idev) {
c5e33bdd
YH		 2505 if (run_pending)
2506 addrconf_dad_run(idev);
2507
1da177e4
LT		 2508 /* If the MTU changed during the interface down, when the
2509 interface up, the changed MTU must be reflected in the
2510 idev as well as routers.
2511 */
2512 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2513 rt6_mtu_change(dev, dev->mtu);
2514 idev->cnf.mtu6 = dev->mtu;
2515 }
2516 idev->tstamp = jiffies;
2517 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2518 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2519 stop IPv6 on this interface.
2520 */
2521 if (dev->mtu < IPV6_MIN_MTU)
2522 addrconf_ifdown(dev, event != NETDEV_DOWN);
2523 }
2524 break;
2525
2526 case NETDEV_CHANGEMTU:
d31c7b8f 2527 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2528 rt6_mtu_change(dev, dev->mtu);
2529 idev->cnf.mtu6 = dev->mtu;
2530 break;
2531 }
2532
d31c7b8f
EP		 2533 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2534 idev = ipv6_add_dev(dev);
2535 if (idev)
2536 break;
2537 }
2538
1da177e4
LT		 2539 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2540
2541 case NETDEV_DOWN:
2542 case NETDEV_UNREGISTER:
2543 /*
2544 * Remove all addresses from this interface.
2545 */
2546 addrconf_ifdown(dev, event != NETDEV_DOWN);
2547 break;
3c21edbd 2548
1da177e4 2549 case NETDEV_CHANGENAME:
1da177e4 2550 if (idev) {
5632c515 2551 snmp6_unregister_dev(idev);
408c4768 2552 addrconf_sysctl_unregister(idev);
f52295a9 2553 addrconf_sysctl_register(idev);
b217d616
HX		 2554 err = snmp6_register_dev(idev);
2555 if (err)
2556 return notifier_from_errno(err);
5632c515 2557 }
1da177e4 2558 break;
3ff50b79 2559 }
1da177e4
LT		 2560
2561 return NOTIFY_OK;
2562}
2563
2564/*
2565 * addrconf module should be notified of a device going up
2566 */
2567static struct notifier_block ipv6_dev_notf = {
2568 .notifier_call = addrconf_notify,
2569 .priority = 0
2570};
2571
2572static int addrconf_ifdown(struct net_device *dev, int how)
2573{
2574 struct inet6_dev *idev;
2575 struct inet6_ifaddr *ifa, **bifa;
c346dca1 2576 struct net *net = dev_net(dev);
1da177e4
LT		 2577 int i;
2578
2579 ASSERT_RTNL();
2580
f3db4851 2581 rt6_ifdown(net, dev);
1da177e4
LT		 2582 neigh_ifdown(&nd_tbl, dev);
2583
2584 idev = __in6_dev_get(dev);
2585 if (idev == NULL)
2586 return -ENODEV;
2587
2588 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2589 Do not dev_put!
1da177e4 2590 */
439e2385 2591 if (how) {
1da177e4 2592 idev->dead = 1;
8814c4b5
YH		 2593
2594 /* protected by rtnl_lock */
2595 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2596
2597 /* Step 1.5: remove snmp6 entry */
2598 snmp6_unregister_dev(idev);
2599
2600 }
2601
2602 /* Step 2: clear hash table */
2603 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2604 bifa = &inet6_addr_lst[i];
2605
2606 write_lock_bh(&addrconf_hash_lock);
2607 while ((ifa = *bifa) != NULL) {
2608 if (ifa->idev == idev) {
2609 *bifa = ifa->lst_next;
2610 ifa->lst_next = NULL;
2611 addrconf_del_timer(ifa);
2612 in6_ifa_put(ifa);
2613 continue;
2614 }
2615 bifa = &ifa->lst_next;
2616 }
2617 write_unlock_bh(&addrconf_hash_lock);
2618 }
2619
2620 write_lock_bh(&idev->lock);
2621
2622 /* Step 3: clear flags for stateless addrconf */
439e2385 2623 if (!how)
3c21edbd 2624 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2625
2626 /* Step 4: clear address list */
2627#ifdef CONFIG_IPV6_PRIVACY
439e2385 2628 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2629 in6_dev_put(idev);
2630
2631 /* clear tempaddr list */
2632 while ((ifa = idev->tempaddr_list) != NULL) {
2633 idev->tempaddr_list = ifa->tmp_next;
2634 ifa->tmp_next = NULL;
2635 ifa->dead = 1;
2636 write_unlock_bh(&idev->lock);
2637 spin_lock_bh(&ifa->lock);
2638
2639 if (ifa->ifpub) {
2640 in6_ifa_put(ifa->ifpub);
2641 ifa->ifpub = NULL;
2642 }
2643 spin_unlock_bh(&ifa->lock);
2644 in6_ifa_put(ifa);
2645 write_lock_bh(&idev->lock);
2646 }
2647#endif
2648 while ((ifa = idev->addr_list) != NULL) {
2649 idev->addr_list = ifa->if_next;
2650 ifa->if_next = NULL;
2651 ifa->dead = 1;
2652 addrconf_del_timer(ifa);
2653 write_unlock_bh(&idev->lock);
2654
2655 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2656 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2657 in6_ifa_put(ifa);
2658
2659 write_lock_bh(&idev->lock);
2660 }
2661 write_unlock_bh(&idev->lock);
2662
2663 /* Step 5: Discard multicast list */
2664
439e2385 2665 if (how)
1da177e4
LT		 2666 ipv6_mc_destroy_dev(idev);
2667 else
2668 ipv6_mc_down(idev);
2669
1da177e4 2670 idev->tstamp = jiffies;
1ab1457c 2671
1da177e4
LT		 2672 /* Shot the device (if unregistered) */
2673
439e2385 2674 if (how) {
408c4768 2675 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2676 neigh_parms_release(&nd_tbl, idev->nd_parms);
2677 neigh_ifdown(&nd_tbl, dev);
2678 in6_dev_put(idev);
2679 }
2680 return 0;
2681}
2682
2683static void addrconf_rs_timer(unsigned long data)
2684{
2685 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2686
2687 if (ifp->idev->cnf.forwarding)
2688 goto out;
2689
2690 if (ifp->idev->if_flags & IF_RA_RCVD) {
2691 /*
2692 * Announcement received after solicitation
2693 * was sent
2694 */
2695 goto out;
2696 }
2697
2698 spin_lock(&ifp->lock);
2699 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
1da177e4
LT		 2700 /* The wait after the last probe can be shorter */
2701 addrconf_mod_timer(ifp, AC_RS,
2702 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2703 ifp->idev->cnf.rtr_solicit_delay :
2704 ifp->idev->cnf.rtr_solicit_interval);
2705 spin_unlock(&ifp->lock);
2706
f3ee4010 2707 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2708 } else {
2709 spin_unlock(&ifp->lock);
2710 /*
2711 * Note: we do not support deprecated "all on-link"
2712 * assumption any longer.
2713 */
2714 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2715 ifp->idev->dev->name);
2716 }
2717
2718out:
2719 in6_ifa_put(ifp);
2720}
2721
2722/*
2723 * Duplicate Address Detection
2724 */
3c21edbd
YH		 2725static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2726{
2727 unsigned long rand_num;
2728 struct inet6_dev *idev = ifp->idev;
2729
95c385b4
NH		 2730 if (ifp->flags & IFA_F_OPTIMISTIC)
2731 rand_num = 0;
2732 else
2733 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2734
3c21edbd
YH		 2735 ifp->probes = idev->cnf.dad_transmits;
2736 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2737}
2738
e431b8c0 2739static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2740{
2741 struct inet6_dev *idev = ifp->idev;
2742 struct net_device *dev = idev->dev;
1da177e4
LT		 2743
2744 addrconf_join_solict(dev, &ifp->addr);
2745
1da177e4 2746 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2747
2748 read_lock_bh(&idev->lock);
2749 if (ifp->dead)
2750 goto out;
2751 spin_lock_bh(&ifp->lock);
2752
2753 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2754 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2755 !(ifp->flags&IFA_F_TENTATIVE) ||
2756 ifp->flags & IFA_F_NODAD) {
95c385b4 2757 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2758 spin_unlock_bh(&ifp->lock);
2759 read_unlock_bh(&idev->lock);
2760
2761 addrconf_dad_completed(ifp);
2762 return;
2763 }
2764
6732bade 2765 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2766 spin_unlock_bh(&ifp->lock);
6732bade 2767 read_unlock_bh(&idev->lock);
3c21edbd 2768 /*
590a9887 2769 * If the device is not ready:
3c21edbd
YH		 2770 * - keep it tentative if it is a permanent address.
2771 * - otherwise, kill it.
2772 */
2773 in6_ifa_hold(ifp);
2774 addrconf_dad_stop(ifp);
6732bade 2775 return;
3c21edbd 2776 }
95c385b4
NH		 2777
2778 /*
2779 * Optimistic nodes can start receiving
2780 * Frames right away
2781 */
2782 if(ifp->flags & IFA_F_OPTIMISTIC)
2783 ip6_ins_rt(ifp->rt);
2784
6732bade
YH		 2785 addrconf_dad_kick(ifp);
2786 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2787out:
2788 read_unlock_bh(&idev->lock);
2789}
2790
2791static void addrconf_dad_timer(unsigned long data)
2792{
2793 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2794 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2795 struct in6_addr mcaddr;
2796
2797 read_lock_bh(&idev->lock);
2798 if (idev->dead) {
2799 read_unlock_bh(&idev->lock);
2800 goto out;
2801 }
2802 spin_lock_bh(&ifp->lock);
2803 if (ifp->probes == 0) {
2804 /*
2805 * DAD was successful
2806 */
2807
95c385b4 2808 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2809 spin_unlock_bh(&ifp->lock);
2810 read_unlock_bh(&idev->lock);
2811
2812 addrconf_dad_completed(ifp);
2813
2814 goto out;
2815 }
2816
2817 ifp->probes--;
2818 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2819 spin_unlock_bh(&ifp->lock);
2820 read_unlock_bh(&idev->lock);
2821
2822 /* send a neighbour solicitation for our addr */
1da177e4 2823 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2824 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2825out:
2826 in6_ifa_put(ifp);
2827}
2828
2829static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2830{
2831 struct net_device * dev = ifp->idev->dev;
2832
2833 /*
2834 * Configure the address for reception. Now it is valid.
2835 */
2836
2837 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2838
2839 /* If added prefix is link local and forwarding is off,
2840 start sending router solicitations.
2841 */
2842
2843 if (ifp->idev->cnf.forwarding == 0 &&
2844 ifp->idev->cnf.rtr_solicits > 0 &&
2845 (dev->flags&IFF_LOOPBACK) == 0 &&
2846 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2847 /*
2848 * If a host as already performed a random delay
2849 * [...] as part of DAD [...] there is no need
2850 * to delay again before sending the first RS
2851 */
f3ee4010 2852 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2853
2854 spin_lock_bh(&ifp->lock);
2855 ifp->probes = 1;
2856 ifp->idev->if_flags |= IF_RS_SENT;
2857 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2858 spin_unlock_bh(&ifp->lock);
2859 }
2860}
2861
c5e33bdd
YH		 2862static void addrconf_dad_run(struct inet6_dev *idev) {
2863 struct inet6_ifaddr *ifp;
2864
2865 read_lock_bh(&idev->lock);
2866 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2867 spin_lock_bh(&ifp->lock);
2868 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2869 spin_unlock_bh(&ifp->lock);
2870 continue;
2871 }
2872 spin_unlock_bh(&ifp->lock);
2873 addrconf_dad_kick(ifp);
2874 }
2875 read_unlock_bh(&idev->lock);
2876}
2877
1da177e4
LT		 2878#ifdef CONFIG_PROC_FS
2879struct if6_iter_state {
3c40090a 2880 struct seq_net_private p;
1da177e4
LT		 2881 int bucket;
2882};
2883
2884static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2885{
2886 struct inet6_ifaddr *ifa = NULL;
2887 struct if6_iter_state *state = seq->private;
1218854a 2888 struct net *net = seq_file_net(seq);
1da177e4
LT		 2889
2890 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2891 ifa = inet6_addr_lst[state->bucket];
3c40090a 2892
878628fb 2893 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
3c40090a 2894 ifa = ifa->lst_next;
1da177e4
LT		 2895 if (ifa)
2896 break;
2897 }
2898 return ifa;
2899}
2900
2901static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2902{
2903 struct if6_iter_state *state = seq->private;
1218854a 2904 struct net *net = seq_file_net(seq);
1da177e4
LT		 2905
2906 ifa = ifa->lst_next;
2907try_again:
3c40090a 2908 if (ifa) {
878628fb 2909 if (!net_eq(dev_net(ifa->idev->dev), net)) {
3c40090a
DL		 2910 ifa = ifa->lst_next;
2911 goto try_again;
2912 }
2913 }
2914
1da177e4
LT		 2915 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2916 ifa = inet6_addr_lst[state->bucket];
2917 goto try_again;
2918 }
3c40090a 2919
1da177e4
LT		 2920 return ifa;
2921}
2922
2923static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2924{
2925 struct inet6_ifaddr *ifa = if6_get_first(seq);
2926
2927 if (ifa)
2928 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2929 --pos;
2930 return pos ? NULL : ifa;
2931}
2932
2933static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 2934 __acquires(addrconf_hash_lock)
1da177e4
LT		 2935{
2936 read_lock_bh(&addrconf_hash_lock);
2937 return if6_get_idx(seq, *pos);
2938}
2939
2940static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2941{
2942 struct inet6_ifaddr *ifa;
2943
2944 ifa = if6_get_next(seq, v);
2945 ++*pos;
2946 return ifa;
2947}
2948
2949static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 2950 __releases(addrconf_hash_lock)
1da177e4
LT		 2951{
2952 read_unlock_bh(&addrconf_hash_lock);
2953}
2954
2955static int if6_seq_show(struct seq_file *seq, void *v)
2956{
2957 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
4b7a4274 2958 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
b071195d 2959 &ifp->addr,
1da177e4
LT		 2960 ifp->idev->dev->ifindex,
2961 ifp->prefix_len,
2962 ifp->scope,
2963 ifp->flags,
2964 ifp->idev->dev->name);
2965 return 0;
2966}
2967
56b3d975 2968static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2969 .start = if6_seq_start,
2970 .next = if6_seq_next,
2971 .show = if6_seq_show,
2972 .stop = if6_seq_stop,
2973};
2974
2975static int if6_seq_open(struct inode *inode, struct file *file)
2976{
3c40090a
DL		 2977 return seq_open_net(inode, file, &if6_seq_ops,
2978 sizeof(struct if6_iter_state));
1da177e4
LT		 2979}
2980
9a32144e 2981static const struct file_operations if6_fops = {
1da177e4
LT		 2982 .owner = THIS_MODULE,
2983 .open = if6_seq_open,
2984 .read = seq_read,
2985 .llseek = seq_lseek,
3c40090a 2986 .release = seq_release_net,
1da177e4
LT		 2987};
2988
3c40090a 2989static int if6_proc_net_init(struct net *net)
1da177e4 2990{
3c40090a 2991 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2992 return -ENOMEM;
2993 return 0;
2994}
2995
3c40090a
DL		 2996static void if6_proc_net_exit(struct net *net)
2997{
2998 proc_net_remove(net, "if_inet6");
2999}
3000
3001static struct pernet_operations if6_proc_net_ops = {
3002 .init = if6_proc_net_init,
3003 .exit = if6_proc_net_exit,
3004};
3005
3006int __init if6_proc_init(void)
3007{
3008 return register_pernet_subsys(&if6_proc_net_ops);
3009}
3010
1da177e4
LT		 3011void if6_proc_exit(void)
3012{
3c40090a 3013 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3014}
3015#endif /* CONFIG_PROC_FS */
3016
59fbb3a6 3017#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3018/* Check if address is a home address configured on any interface. */
389f6612 3019int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3020{
3021 int ret = 0;
3022 struct inet6_ifaddr * ifp;
3023 u8 hash = ipv6_addr_hash(addr);
3024 read_lock_bh(&addrconf_hash_lock);
3025 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
878628fb 3026 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3027 continue;
caad295f 3028 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3029 (ifp->flags & IFA_F_HOMEADDRESS)) {
3030 ret = 1;
3031 break;
3032 }
3033 }
3034 read_unlock_bh(&addrconf_hash_lock);
3035 return ret;
3036}
3037#endif
3038
1da177e4
LT		 3039/*
3040 * Periodic address status verification
3041 */
3042
3043static void addrconf_verify(unsigned long foo)
3044{
3045 struct inet6_ifaddr *ifp;
3046 unsigned long now, next;
3047 int i;
3048
3049 spin_lock_bh(&addrconf_verify_lock);
3050 now = jiffies;
3051 next = now + ADDR_CHECK_FREQUENCY;
3052
3053 del_timer(&addr_chk_timer);
3054
3055 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3056
3057restart:
5d5780df 3058 read_lock(&addrconf_hash_lock);
1da177e4
LT		 3059 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3060 unsigned long age;
3061#ifdef CONFIG_IPV6_PRIVACY
3062 unsigned long regen_advance;
3063#endif
3064
3065 if (ifp->flags & IFA_F_PERMANENT)
3066 continue;
3067
3068 spin_lock(&ifp->lock);
3069 age = (now - ifp->tstamp) / HZ;
3070
3071#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 3072 regen_advance = ifp->idev->cnf.regen_max_retry *
3073 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 3074 ifp->idev->nd_parms->retrans_time / HZ;
3075#endif
3076
8f27ebb9
YH		 3077 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3078 age >= ifp->valid_lft) {
1da177e4
LT		 3079 spin_unlock(&ifp->lock);
3080 in6_ifa_hold(ifp);
5d5780df 3081 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3082 ipv6_del_addr(ifp);
3083 goto restart;
8f27ebb9
YH		 3084 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3085 spin_unlock(&ifp->lock);
3086 continue;
1da177e4
LT		 3087 } else if (age >= ifp->prefered_lft) {
3088 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3089 int deprecate = 0;
3090
3091 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3092 deprecate = 1;
3093 ifp->flags |= IFA_F_DEPRECATED;
3094 }
3095
3096 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3097 next = ifp->tstamp + ifp->valid_lft * HZ;
3098
3099 spin_unlock(&ifp->lock);
3100
3101 if (deprecate) {
3102 in6_ifa_hold(ifp);
5d5780df 3103 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3104
3105 ipv6_ifa_notify(0, ifp);
3106 in6_ifa_put(ifp);
3107 goto restart;
3108 }
3109#ifdef CONFIG_IPV6_PRIVACY
3110 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3111 !(ifp->flags&IFA_F_TENTATIVE)) {
3112 if (age >= ifp->prefered_lft - regen_advance) {
3113 struct inet6_ifaddr *ifpub = ifp->ifpub;
3114 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3115 next = ifp->tstamp + ifp->prefered_lft * HZ;
3116 if (!ifp->regen_count && ifpub) {
3117 ifp->regen_count++;
3118 in6_ifa_hold(ifp);
3119 in6_ifa_hold(ifpub);
3120 spin_unlock(&ifp->lock);
5d5780df 3121 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3122 spin_lock(&ifpub->lock);
3123 ifpub->regen_count = 0;
3124 spin_unlock(&ifpub->lock);
1da177e4
LT		 3125 ipv6_create_tempaddr(ifpub, ifp);
3126 in6_ifa_put(ifpub);
3127 in6_ifa_put(ifp);
3128 goto restart;
3129 }
3130 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3131 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3132 spin_unlock(&ifp->lock);
3133#endif
3134 } else {
3135 /* ifp->prefered_lft <= ifp->valid_lft */
3136 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3137 next = ifp->tstamp + ifp->prefered_lft * HZ;
3138 spin_unlock(&ifp->lock);
3139 }
3140 }
5d5780df 3141 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3142 }
3143
3144 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3145 add_timer(&addr_chk_timer);
3146 spin_unlock_bh(&addrconf_verify_lock);
3147}
3148
461d8837
TG		 3149static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3150{
3151 struct in6_addr *pfx = NULL;
3152
3153 if (addr)
3154 pfx = nla_data(addr);
3155
3156 if (local) {
3157 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3158 pfx = NULL;
3159 else
3160 pfx = nla_data(local);
3161 }
3162
3163 return pfx;
3164}
3165
ef7c79ed 3166static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3167 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3168 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3169 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3170};
3171
1da177e4
LT		 3172static int
3173inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3174{
3b1e0a65 3175 struct net *net = sock_net(skb->sk);
b933f716
TG		 3176 struct ifaddrmsg *ifm;
3177 struct nlattr *tb[IFA_MAX+1];
1da177e4 3178 struct in6_addr *pfx;
b933f716 3179 int err;
1da177e4 3180
b933f716
TG		 3181 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3182 if (err < 0)
3183 return err;
3184
3185 ifm = nlmsg_data(nlh);
3186 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3187 if (pfx == NULL)
3188 return -EINVAL;
3189
af284937 3190 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3191}
3192
55ebaef1
NT		 3193static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3194 u32 prefered_lft, u32 valid_lft)
081bba5b 3195{
6f704992
YH		 3196 u32 flags;
3197 clock_t expires;
4bed72e4 3198 unsigned long timeout;
46d48046 3199
081bba5b
NT		 3200 if (!valid_lft || (prefered_lft > valid_lft))
3201 return -EINVAL;
3202
4bed72e4
YH		 3203 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3204 if (addrconf_finite_timeout(timeout)) {
3205 expires = jiffies_to_clock_t(timeout * HZ);
3206 valid_lft = timeout;
6f704992 3207 flags = RTF_EXPIRES;
4bed72e4
YH		 3208 } else {
3209 expires = 0;
3210 flags = 0;
3211 ifa_flags |= IFA_F_PERMANENT;
6f704992 3212 }
081bba5b 3213
4bed72e4
YH		 3214 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3215 if (addrconf_finite_timeout(timeout)) {
3216 if (timeout == 0)
3217 ifa_flags |= IFA_F_DEPRECATED;
3218 prefered_lft = timeout;
3219 }
081bba5b
NT		 3220
3221 spin_lock_bh(&ifp->lock);
3b9f9a1c 3222 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3223 ifp->tstamp = jiffies;
3224 ifp->valid_lft = valid_lft;
3225 ifp->prefered_lft = prefered_lft;
3226
3227 spin_unlock_bh(&ifp->lock);
3228 if (!(ifp->flags&IFA_F_TENTATIVE))
3229 ipv6_ifa_notify(0, ifp);
081bba5b 3230
46d48046 3231 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3232 expires, flags);
081bba5b
NT		 3233 addrconf_verify(0);
3234
3235 return 0;
3236}
3237
1da177e4
LT		 3238static int
3239inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3240{
3b1e0a65 3241 struct net *net = sock_net(skb->sk);
461d8837
TG		 3242 struct ifaddrmsg *ifm;
3243 struct nlattr *tb[IFA_MAX+1];
1da177e4 3244 struct in6_addr *pfx;
7198f8ce
TG		 3245 struct inet6_ifaddr *ifa;
3246 struct net_device *dev;
55ebaef1
NT		 3247 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3248 u8 ifa_flags;
461d8837 3249 int err;
1da177e4 3250
461d8837
TG		 3251 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3252 if (err < 0)
3253 return err;
3254
3255 ifm = nlmsg_data(nlh);
3256 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3257 if (pfx == NULL)
3258 return -EINVAL;
3259
461d8837 3260 if (tb[IFA_CACHEINFO]) {
0778769d 3261 struct ifa_cacheinfo *ci;
461d8837
TG		 3262
3263 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3264 valid_lft = ci->ifa_valid;
461d8837
TG		 3265 preferred_lft = ci->ifa_prefered;
3266 } else {
3267 preferred_lft = INFINITY_LIFE_TIME;
3268 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3269 }
3270
af284937 3271 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3272 if (dev == NULL)
3273 return -ENODEV;
3274
55ebaef1 3275 /* We ignore other flags so far. */
3b9f9a1c 3276 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3277
1cab3da6 3278 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3279 if (ifa == NULL) {
3280 /*
3281 * It would be best to check for !NLM_F_CREATE here but
3282 * userspace alreay relies on not having to provide this.
3283 */
af284937
DL		 3284 return inet6_addr_add(net, ifm->ifa_index, pfx,
3285 ifm->ifa_prefixlen, ifa_flags,
3286 preferred_lft, valid_lft);
081bba5b
NT		 3287 }
3288
7198f8ce
TG		 3289 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3290 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3291 err = -EEXIST;
3292 else
55ebaef1 3293 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3294
3295 in6_ifa_put(ifa);
3296
3297 return err;
1da177e4
LT		 3298}
3299
101bb229
TG		 3300static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3301 u8 scope, int ifindex)
3302{
3303 struct ifaddrmsg *ifm;
3304
3305 ifm = nlmsg_data(nlh);
3306 ifm->ifa_family = AF_INET6;
3307 ifm->ifa_prefixlen = prefixlen;
3308 ifm->ifa_flags = flags;
3309 ifm->ifa_scope = scope;
3310 ifm->ifa_index = ifindex;
3311}
3312
85486af0
TG		 3313static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3314 unsigned long tstamp, u32 preferred, u32 valid)
3315{
3316 struct ifa_cacheinfo ci;
3317
3318 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3319 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3320 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3321 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3322 ci.ifa_prefered = preferred;
3323 ci.ifa_valid = valid;
3324
3325 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3326}
3327
101bb229
TG		 3328static inline int rt_scope(int ifa_scope)
3329{
3330 if (ifa_scope & IFA_HOST)
3331 return RT_SCOPE_HOST;
3332 else if (ifa_scope & IFA_LINK)
3333 return RT_SCOPE_LINK;
3334 else if (ifa_scope & IFA_SITE)
3335 return RT_SCOPE_SITE;
3336 else
3337 return RT_SCOPE_UNIVERSE;
3338}
3339
0ab6803b
TG		 3340static inline int inet6_ifaddr_msgsize(void)
3341{
339bf98f
TG		 3342 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3343 + nla_total_size(16) /* IFA_ADDRESS */
3344 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3345}
c5396a31 3346
1da177e4 3347static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3348 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3349{
1da177e4 3350 struct nlmsghdr *nlh;
85486af0 3351 u32 preferred, valid;
1da177e4 3352
0ab6803b
TG		 3353 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3354 if (nlh == NULL)
26932566 3355 return -EMSGSIZE;
0ab6803b 3356
101bb229
TG		 3357 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3358 ifa->idev->dev->ifindex);
3359
1da177e4 3360 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3361 preferred = ifa->prefered_lft;
3362 valid = ifa->valid_lft;
3363 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3364 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3365 preferred -= tval;
3366 if (valid != INFINITY_LIFE_TIME)
3367 valid -= tval;
1da177e4
LT		 3368 }
3369 } else {
85486af0
TG		 3370 preferred = INFINITY_LIFE_TIME;
3371 valid = INFINITY_LIFE_TIME;
3372 }
3373
0ab6803b 3374 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3375 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3376 nlmsg_cancel(skb, nlh);
3377 return -EMSGSIZE;
3378 }
1da177e4 3379
0ab6803b 3380 return nlmsg_end(skb, nlh);
1da177e4
LT		 3381}
3382
3383static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3384 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3385{
1da177e4 3386 struct nlmsghdr *nlh;
101bb229
TG		 3387 u8 scope = RT_SCOPE_UNIVERSE;
3388 int ifindex = ifmca->idev->dev->ifindex;
3389
3390 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3391 scope = RT_SCOPE_SITE;
1da177e4 3392
0ab6803b
TG		 3393 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3394 if (nlh == NULL)
26932566 3395 return -EMSGSIZE;
85486af0 3396
0ab6803b
TG		 3397 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3398 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3399 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3400 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3401 nlmsg_cancel(skb, nlh);
3402 return -EMSGSIZE;
3403 }
85486af0 3404
0ab6803b 3405 return nlmsg_end(skb, nlh);
1da177e4
LT		 3406}
3407
3408static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3409 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3410{
1da177e4 3411 struct nlmsghdr *nlh;
101bb229
TG		 3412 u8 scope = RT_SCOPE_UNIVERSE;
3413 int ifindex = ifaca->aca_idev->dev->ifindex;
3414
3415 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3416 scope = RT_SCOPE_SITE;
1da177e4 3417
0ab6803b
TG		 3418 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3419 if (nlh == NULL)
26932566 3420 return -EMSGSIZE;
85486af0 3421
0ab6803b
TG		 3422 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3423 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3424 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3425 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3426 nlmsg_cancel(skb, nlh);
3427 return -EMSGSIZE;
3428 }
1da177e4 3429
0ab6803b 3430 return nlmsg_end(skb, nlh);
1da177e4
LT		 3431}
3432
3433enum addr_type_t
3434{
3435 UNICAST_ADDR,
3436 MULTICAST_ADDR,
3437 ANYCAST_ADDR,
3438};
3439
3440static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3441 enum addr_type_t type)
3442{
3443 int idx, ip_idx;
3444 int s_idx, s_ip_idx;
3445 int err = 1;
3446 struct net_device *dev;
3447 struct inet6_dev *idev = NULL;
3448 struct inet6_ifaddr *ifa;
3449 struct ifmcaddr6 *ifmca;
3450 struct ifacaddr6 *ifaca;
3b1e0a65 3451 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3452
3453 s_idx = cb->args[0];
3454 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3455
7562f876 3456 idx = 0;
6fda7350 3457 for_each_netdev(net, dev) {
1da177e4 3458 if (idx < s_idx)
7562f876 3459 goto cont;
1da177e4
LT		 3460 if (idx > s_idx)
3461 s_ip_idx = 0;
3462 ip_idx = 0;
3463 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3464 goto cont;
1da177e4
LT		 3465 read_lock_bh(&idev->lock);
3466 switch (type) {
3467 case UNICAST_ADDR:
ae9cda5d 3468 /* unicast address incl. temp addr */
1da177e4
LT		 3469 for (ifa = idev->addr_list; ifa;
3470 ifa = ifa->if_next, ip_idx++) {
3471 if (ip_idx < s_ip_idx)
3472 continue;
5d5619b4
YH		 3473 err = inet6_fill_ifaddr(skb, ifa,
3474 NETLINK_CB(cb->skb).pid,
3475 cb->nlh->nlmsg_seq,
3476 RTM_NEWADDR,
3477 NLM_F_MULTI);
1da177e4 3478 }
1da177e4
LT		 3479 break;
3480 case MULTICAST_ADDR:
3481 /* multicast address */
1ab1457c 3482 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3483 ifmca = ifmca->next, ip_idx++) {
3484 if (ip_idx < s_ip_idx)
3485 continue;
5d5619b4
YH		 3486 err = inet6_fill_ifmcaddr(skb, ifmca,
3487 NETLINK_CB(cb->skb).pid,
3488 cb->nlh->nlmsg_seq,
3489 RTM_GETMULTICAST,
3490 NLM_F_MULTI);
1da177e4
LT		 3491 }
3492 break;
3493 case ANYCAST_ADDR:
3494 /* anycast address */
3495 for (ifaca = idev->ac_list; ifaca;
3496 ifaca = ifaca->aca_next, ip_idx++) {
3497 if (ip_idx < s_ip_idx)
3498 continue;
5d5619b4
YH		 3499 err = inet6_fill_ifacaddr(skb, ifaca,
3500 NETLINK_CB(cb->skb).pid,
3501 cb->nlh->nlmsg_seq,
3502 RTM_GETANYCAST,
3503 NLM_F_MULTI);
1da177e4
LT		 3504 }
3505 break;
3506 default:
3507 break;
3508 }
3509 read_unlock_bh(&idev->lock);
3510 in6_dev_put(idev);
5d5619b4
YH		 3511
3512 if (err <= 0)
3513 break;
7562f876
PE		 3514cont:
3515 idx++;
1da177e4 3516 }
1da177e4
LT		 3517 cb->args[0] = idx;
3518 cb->args[1] = ip_idx;
3519 return skb->len;
3520}
3521
3522static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3523{
3524 enum addr_type_t type = UNICAST_ADDR;
b854272b 3525
1da177e4
LT		 3526 return inet6_dump_addr(skb, cb, type);
3527}
3528
3529static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3530{
3531 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3532
1da177e4
LT		 3533 return inet6_dump_addr(skb, cb, type);
3534}
3535
3536
3537static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3538{
3539 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3540
1da177e4
LT		 3541 return inet6_dump_addr(skb, cb, type);
3542}
3543
1b29fc2c
TG		 3544static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3545 void *arg)
6c223828 3546{
3b1e0a65 3547 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3548 struct ifaddrmsg *ifm;
3549 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3550 struct in6_addr *addr = NULL;
3551 struct net_device *dev = NULL;
3552 struct inet6_ifaddr *ifa;
3553 struct sk_buff *skb;
6c223828
NT		 3554 int err;
3555
1b29fc2c
TG		 3556 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3557 if (err < 0)
3558 goto errout;
3559
3560 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3561 if (addr == NULL) {
3562 err = -EINVAL;
3563 goto errout;
6c223828 3564 }
6c223828 3565
1b29fc2c 3566 ifm = nlmsg_data(nlh);
6c223828 3567 if (ifm->ifa_index)
6fda7350 3568 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3569
1cab3da6 3570 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3571 err = -EADDRNOTAVAIL;
3572 goto errout;
3573 }
6c223828 3574
0ab6803b 3575 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3576 err = -ENOBUFS;
1b29fc2c 3577 goto errout_ifa;
6c223828
NT		 3578 }
3579
6c223828
NT		 3580 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3581 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3582 if (err < 0) {
3583 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3584 WARN_ON(err == -EMSGSIZE);
3585 kfree_skb(skb);
3586 goto errout_ifa;
3587 }
6fda7350 3588 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3589errout_ifa:
6c223828 3590 in6_ifa_put(ifa);
1b29fc2c 3591errout:
6c223828 3592 return err;
6c223828
NT		 3593}
3594
1da177e4
LT		 3595static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3596{
3597 struct sk_buff *skb;
c346dca1 3598 struct net *net = dev_net(ifa->idev->dev);
5d620266 3599 int err = -ENOBUFS;
1da177e4 3600
0ab6803b 3601 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3602 if (skb == NULL)
3603 goto errout;
3604
3605 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3606 if (err < 0) {
3607 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3608 WARN_ON(err == -EMSGSIZE);
3609 kfree_skb(skb);
3610 goto errout;
3611 }
1ce85fe4
PNA		 3612 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3613 return;
5d620266
TG		 3614errout:
3615 if (err < 0)
6fda7350 3616 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3617}
3618
b6f99a21 3619static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3620 __s32 *array, int bytes)
3621{
04561c1f
TG		 3622 BUG_ON(bytes < (DEVCONF_MAX * 4));
3623
1da177e4
LT		 3624 memset(array, 0, bytes);
3625 array[DEVCONF_FORWARDING] = cnf->forwarding;
3626 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3627 array[DEVCONF_MTU6] = cnf->mtu6;
3628 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3629 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3630 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3631 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3632 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3633 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3634 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3635 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3636#ifdef CONFIG_IPV6_PRIVACY
3637 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3638 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3639 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3640 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3641 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3642#endif
3643 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3644 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3645 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3646#ifdef CONFIG_IPV6_ROUTER_PREF
3647 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3648 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3649#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3650 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3651#endif
930d6ff2 3652#endif
fbea49e1 3653 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3654 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3655#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3656 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3657#endif
7bc570c8
YH		 3658#ifdef CONFIG_IPV6_MROUTE
3659 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3660#endif
778d80be 3661 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3662 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
1da177e4
LT		 3663}
3664
339bf98f
TG		 3665static inline size_t inet6_if_nlmsg_size(void)
3666{
3667 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3668 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3669 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3670 + nla_total_size(4) /* IFLA_MTU */
3671 + nla_total_size(4) /* IFLA_LINK */
3672 + nla_total_size( /* IFLA_PROTINFO */
3673 nla_total_size(4) /* IFLA_INET6_FLAGS */
3674 + nla_total_size(sizeof(struct ifla_cacheinfo))
3675 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3676 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3677 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3678 );
3679}
c5396a31 3680
7f7d9a6b
HX		 3681static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3682 int bytes)
3683{
3684 int i;
3685 int pad = bytes - sizeof(u64) * items;
3686 BUG_ON(pad < 0);
3687
3688 /* Use put_unaligned() because stats may not be aligned for u64. */
3689 put_unaligned(items, &stats[0]);
3690 for (i = 1; i < items; i++)
3691 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3692
3693 memset(&stats[items], 0, pad);
3694}
3695
3696static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3697 int bytes)
3698{
3699 switch(attrtype) {
3700 case IFLA_INET6_STATS:
3701 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3702 break;
3703 case IFLA_INET6_ICMP6STATS:
3704 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3705 break;
3706 }
3707}
3708
1ab1457c 3709static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3710 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3711{
04561c1f 3712 struct net_device *dev = idev->dev;
bf99f1bd 3713 struct nlattr *nla;
04561c1f
TG		 3714 struct ifinfomsg *hdr;
3715 struct nlmsghdr *nlh;
3716 void *protoinfo;
3717 struct ifla_cacheinfo ci;
3718
3719 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3720 if (nlh == NULL)
26932566 3721 return -EMSGSIZE;
04561c1f
TG		 3722
3723 hdr = nlmsg_data(nlh);
3724 hdr->ifi_family = AF_INET6;
3725 hdr->__ifi_pad = 0;
3726 hdr->ifi_type = dev->type;
3727 hdr->ifi_index = dev->ifindex;
3728 hdr->ifi_flags = dev_get_flags(dev);
3729 hdr->ifi_change = 0;
3730
3731 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3732
3733 if (dev->addr_len)
04561c1f 3734 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3735
04561c1f 3736 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3737 if (dev->ifindex != dev->iflink)
04561c1f 3738 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3739
04561c1f
TG		 3740 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3741 if (protoinfo == NULL)
3742 goto nla_put_failure;
1da177e4 3743
04561c1f 3744 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3745
1da177e4
LT		 3746 ci.max_reasm_len = IPV6_MAXPLEN;
3747 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3748 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3749 ci.reachable_time = idev->nd_parms->reachable_time;
3750 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3751 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3752
bf99f1bd
YH		 3753 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3754 if (nla == NULL)
04561c1f 3755 goto nla_put_failure;
bf99f1bd 3756 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3757
bf99f1bd
YH		 3758 /* XXX - MC not implemented */
3759
3760 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3761 if (nla == NULL)
3762 goto nla_put_failure;
3763 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3764
3765 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3766 if (nla == NULL)
3767 goto nla_put_failure;
3768 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3769
04561c1f
TG		 3770 nla_nest_end(skb, protoinfo);
3771 return nlmsg_end(skb, nlh);
1da177e4 3772
04561c1f 3773nla_put_failure:
26932566
PM		 3774 nlmsg_cancel(skb, nlh);
3775 return -EMSGSIZE;
1da177e4
LT		 3776}
3777
3778static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3779{
3b1e0a65 3780 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3781 int idx, err;
3782 int s_idx = cb->args[0];
3783 struct net_device *dev;
3784 struct inet6_dev *idev;
3785
3786 read_lock(&dev_base_lock);
7562f876 3787 idx = 0;
6fda7350 3788 for_each_netdev(net, dev) {
1da177e4 3789 if (idx < s_idx)
7562f876 3790 goto cont;
1da177e4 3791 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3792 goto cont;
1ab1457c 3793 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3794 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3795 in6_dev_put(idev);
3796 if (err <= 0)
3797 break;
7562f876
PE		 3798cont:
3799 idx++;
1da177e4
LT		 3800 }
3801 read_unlock(&dev_base_lock);
3802 cb->args[0] = idx;
3803
3804 return skb->len;
3805}
3806
3807void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3808{
3809 struct sk_buff *skb;
c346dca1 3810 struct net *net = dev_net(idev->dev);
8d7a76c9 3811 int err = -ENOBUFS;
1ab1457c 3812
339bf98f 3813 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3814 if (skb == NULL)
3815 goto errout;
3816
3817 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3818 if (err < 0) {
3819 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3820 WARN_ON(err == -EMSGSIZE);
3821 kfree_skb(skb);
3822 goto errout;
3823 }
1ce85fe4
PNA		 3824 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3825 return;
8d7a76c9
TG		 3826errout:
3827 if (err < 0)
6fda7350 3828 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3829}
3830
339bf98f
TG		 3831static inline size_t inet6_prefix_nlmsg_size(void)
3832{
3833 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3834 + nla_total_size(sizeof(struct in6_addr))
3835 + nla_total_size(sizeof(struct prefix_cacheinfo));
3836}
c5396a31 3837
1da177e4 3838static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3839 struct prefix_info *pinfo, u32 pid, u32 seq,
3840 int event, unsigned int flags)
1da177e4 3841{
6051e2f4
TG		 3842 struct prefixmsg *pmsg;
3843 struct nlmsghdr *nlh;
1da177e4
LT		 3844 struct prefix_cacheinfo ci;
3845
6051e2f4
TG		 3846 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3847 if (nlh == NULL)
26932566 3848 return -EMSGSIZE;
6051e2f4
TG		 3849
3850 pmsg = nlmsg_data(nlh);
1da177e4 3851 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3852 pmsg->prefix_pad1 = 0;
3853 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3854 pmsg->prefix_ifindex = idev->dev->ifindex;
3855 pmsg->prefix_len = pinfo->prefix_len;
3856 pmsg->prefix_type = pinfo->type;
8a47077a 3857 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3858 pmsg->prefix_flags = 0;
3859 if (pinfo->onlink)
3860 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3861 if (pinfo->autoconf)
3862 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3863
6051e2f4 3864 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3865
3866 ci.preferred_time = ntohl(pinfo->prefered);
3867 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3868 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3869
6051e2f4 3870 return nlmsg_end(skb, nlh);
1da177e4 3871
6051e2f4 3872nla_put_failure:
26932566
PM		 3873 nlmsg_cancel(skb, nlh);
3874 return -EMSGSIZE;
1da177e4
LT		 3875}
3876
1ab1457c 3877static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3878 struct prefix_info *pinfo)
3879{
3880 struct sk_buff *skb;
c346dca1 3881 struct net *net = dev_net(idev->dev);
8c384bfa 3882 int err = -ENOBUFS;
1da177e4 3883
339bf98f 3884 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3885 if (skb == NULL)
3886 goto errout;
3887
3888 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3889 if (err < 0) {
3890 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3891 WARN_ON(err == -EMSGSIZE);
3892 kfree_skb(skb);
3893 goto errout;
3894 }
1ce85fe4
PNA		 3895 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3896 return;
8c384bfa
TG		 3897errout:
3898 if (err < 0)
6fda7350 3899 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3900}
3901
1da177e4
LT		 3902static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3903{
3904 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3905
3906 switch (event) {
3907 case RTM_NEWADDR:
95c385b4
NH		 3908 /*
3909 * If the address was optimistic
3910 * we inserted the route at the start of
3911 * our DAD process, so we don't need
3912 * to do it again
3913 */
3914 if (!(ifp->rt->rt6i_node))
3915 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3916 if (ifp->idev->cnf.forwarding)
3917 addrconf_join_anycast(ifp);
3918 break;
3919 case RTM_DELADDR:
3920 if (ifp->idev->cnf.forwarding)
3921 addrconf_leave_anycast(ifp);
3922 addrconf_leave_solict(ifp->idev, &ifp->addr);
3923 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3924 if (ip6_del_rt(ifp->rt))
1da177e4 3925 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3926 break;
3927 }
3928}
3929
3930static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3931{
8814c4b5 3932 rcu_read_lock_bh();
1da177e4
LT		 3933 if (likely(ifp->idev->dead == 0))
3934 __ipv6_ifa_notify(event, ifp);
8814c4b5 3935 rcu_read_unlock_bh();
1da177e4
LT		 3936}
3937
3938#ifdef CONFIG_SYSCTL
3939
3940static
3941int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3942 void __user *buffer, size_t *lenp, loff_t *ppos)
3943{
3944 int *valp = ctl->data;
3945 int val = *valp;
3946 int ret;
3947
3948 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3949
c8fecf22 3950 if (write)
b325fddb 3951 ret = addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3952 return ret;
1da177e4
LT		 3953}
3954
1ab1457c 3955static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3956 void __user *oldval,
3957 size_t __user *oldlenp,
1f29bcd7 3958 void __user *newval, size_t newlen)
1da177e4
LT		 3959{
3960 int *valp = table->data;
c8fecf22 3961 int val = *valp;
1da177e4
LT		 3962 int new;
3963
3964 if (!newval || !newlen)
3965 return 0;
3966 if (newlen != sizeof(int))
3967 return -EINVAL;
3968 if (get_user(new, (int __user *)newval))
3969 return -EFAULT;
3970 if (new == *valp)
3971 return 0;
3972 if (oldval && oldlenp) {
3973 size_t len;
3974 if (get_user(len, oldlenp))
3975 return -EFAULT;
3976 if (len) {
3977 if (len > table->maxlen)
3978 len = table->maxlen;
3979 if (copy_to_user(oldval, valp, len))
3980 return -EFAULT;
3981 if (put_user(len, oldlenp))
3982 return -EFAULT;
3983 }
3984 }
3985
c8fecf22 3986 *valp = new;
b325fddb 3987 return addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 3988}
3989
56d417b1
BH		 3990static void dev_disable_change(struct inet6_dev *idev)
3991{
3992 if (!idev || !idev->dev)
3993 return;
3994
3995 if (idev->cnf.disable_ipv6)
3996 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
3997 else
3998 addrconf_notify(NULL, NETDEV_UP, idev->dev);
3999}
4000
4001static void addrconf_disable_change(struct net *net, __s32 newf)
4002{
4003 struct net_device *dev;
4004 struct inet6_dev *idev;
4005
4006 read_lock(&dev_base_lock);
4007 for_each_netdev(net, dev) {
4008 rcu_read_lock();
4009 idev = __in6_dev_get(dev);
4010 if (idev) {
4011 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4012 idev->cnf.disable_ipv6 = newf;
4013 if (changed)
4014 dev_disable_change(idev);
4015 }
4016 rcu_read_unlock();
4017 }
4018 read_unlock(&dev_base_lock);
4019}
4020
4021static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
4022{
4023 struct net *net;
4024
4025 net = (struct net *)table->extra2;
4026
4027 if (p == &net->ipv6.devconf_dflt->disable_ipv6)
4028 return 0;
4029
4030 if (!rtnl_trylock())
4031 return restart_syscall();
4032
4033 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4034 __s32 newf = net->ipv6.devconf_all->disable_ipv6;
4035 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4036 addrconf_disable_change(net, newf);
4037 } else if ((!*p) ^ (!old))
4038 dev_disable_change((struct inet6_dev *)table->extra1);
4039
4040 rtnl_unlock();
4041 return 0;
4042}
4043
4044static
4045int addrconf_sysctl_disable(ctl_table *ctl, int write, struct file * filp,
4046 void __user *buffer, size_t *lenp, loff_t *ppos)
4047{
4048 int *valp = ctl->data;
4049 int val = *valp;
4050 int ret;
4051
4052 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
4053
4054 if (write)
4055 ret = addrconf_disable_ipv6(ctl, valp, val);
4056 return ret;
4057}
4058
1da177e4
LT		 4059static struct addrconf_sysctl_table
4060{
4061 struct ctl_table_header *sysctl_header;
f6a07b29 4062 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4063 char *dev_name;
ab32ea5d 4064} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4065 .sysctl_header = NULL,
4066 .addrconf_vars = {
1ab1457c 4067 {
1da177e4
LT		 4068 .ctl_name = NET_IPV6_FORWARDING,
4069 .procname = "forwarding",
1ab1457c 4070 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 4071 .maxlen = sizeof(int),
4072 .mode = 0644,
6d9f239a
AD		 4073 .proc_handler = addrconf_sysctl_forward,
4074 .strategy = addrconf_sysctl_forward_strategy,
1da177e4
LT		 4075 },
4076 {
4077 .ctl_name = NET_IPV6_HOP_LIMIT,
4078 .procname = "hop_limit",
1ab1457c 4079 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 4080 .maxlen = sizeof(int),
4081 .mode = 0644,
4082 .proc_handler = proc_dointvec,
4083 },
4084 {
4085 .ctl_name = NET_IPV6_MTU,
4086 .procname = "mtu",
4087 .data = &ipv6_devconf.mtu6,
1ab1457c 4088 .maxlen = sizeof(int),
1da177e4 4089 .mode = 0644,
6d9f239a 4090 .proc_handler = proc_dointvec,
1da177e4
LT		 4091 },
4092 {
4093 .ctl_name = NET_IPV6_ACCEPT_RA,
4094 .procname = "accept_ra",
1ab1457c 4095 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 4096 .maxlen = sizeof(int),
4097 .mode = 0644,
6d9f239a 4098 .proc_handler = proc_dointvec,
1da177e4
LT		 4099 },
4100 {
4101 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4102 .procname = "accept_redirects",
1ab1457c 4103 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 4104 .maxlen = sizeof(int),
4105 .mode = 0644,
6d9f239a 4106 .proc_handler = proc_dointvec,
1da177e4
LT		 4107 },
4108 {
4109 .ctl_name = NET_IPV6_AUTOCONF,
4110 .procname = "autoconf",
1ab1457c 4111 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 4112 .maxlen = sizeof(int),
4113 .mode = 0644,
6d9f239a 4114 .proc_handler = proc_dointvec,
1da177e4
LT		 4115 },
4116 {
4117 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4118 .procname = "dad_transmits",
1ab1457c 4119 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 4120 .maxlen = sizeof(int),
4121 .mode = 0644,
6d9f239a 4122 .proc_handler = proc_dointvec,
1da177e4
LT		 4123 },
4124 {
4125 .ctl_name = NET_IPV6_RTR_SOLICITS,
4126 .procname = "router_solicitations",
1ab1457c 4127 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 4128 .maxlen = sizeof(int),
4129 .mode = 0644,
6d9f239a 4130 .proc_handler = proc_dointvec,
1da177e4
LT		 4131 },
4132 {
4133 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4134 .procname = "router_solicitation_interval",
1ab1457c 4135 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 4136 .maxlen = sizeof(int),
4137 .mode = 0644,
6d9f239a
AD		 4138 .proc_handler = proc_dointvec_jiffies,
4139 .strategy = sysctl_jiffies,
1da177e4
LT		 4140 },
4141 {
4142 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4143 .procname = "router_solicitation_delay",
1ab1457c 4144 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 4145 .maxlen = sizeof(int),
4146 .mode = 0644,
6d9f239a
AD		 4147 .proc_handler = proc_dointvec_jiffies,
4148 .strategy = sysctl_jiffies,
1da177e4
LT		 4149 },
4150 {
4151 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4152 .procname = "force_mld_version",
1ab1457c 4153 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 4154 .maxlen = sizeof(int),
4155 .mode = 0644,
6d9f239a 4156 .proc_handler = proc_dointvec,
1da177e4
LT		 4157 },
4158#ifdef CONFIG_IPV6_PRIVACY
4159 {
4160 .ctl_name = NET_IPV6_USE_TEMPADDR,
4161 .procname = "use_tempaddr",
1ab1457c 4162 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 4163 .maxlen = sizeof(int),
4164 .mode = 0644,
6d9f239a 4165 .proc_handler = proc_dointvec,
1da177e4
LT		 4166 },
4167 {
4168 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4169 .procname = "temp_valid_lft",
1ab1457c 4170 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4171 .maxlen = sizeof(int),
4172 .mode = 0644,
6d9f239a 4173 .proc_handler = proc_dointvec,
1da177e4
LT		 4174 },
4175 {
4176 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4177 .procname = "temp_prefered_lft",
1ab1457c 4178 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4179 .maxlen = sizeof(int),
4180 .mode = 0644,
6d9f239a 4181 .proc_handler = proc_dointvec,
1da177e4
LT		 4182 },
4183 {
4184 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4185 .procname = "regen_max_retry",
1ab1457c 4186 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4187 .maxlen = sizeof(int),
4188 .mode = 0644,
6d9f239a 4189 .proc_handler = proc_dointvec,
1da177e4
LT		 4190 },
4191 {
4192 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4193 .procname = "max_desync_factor",
1ab1457c 4194 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4195 .maxlen = sizeof(int),
4196 .mode = 0644,
6d9f239a 4197 .proc_handler = proc_dointvec,
1da177e4
LT		 4198 },
4199#endif
4200 {
4201 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4202 .procname = "max_addresses",
4203 .data = &ipv6_devconf.max_addresses,
4204 .maxlen = sizeof(int),
4205 .mode = 0644,
6d9f239a 4206 .proc_handler = proc_dointvec,
1da177e4 4207 },
65f5c7c1
YH		 4208 {
4209 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4210 .procname = "accept_ra_defrtr",
1ab1457c 4211 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4212 .maxlen = sizeof(int),
4213 .mode = 0644,
6d9f239a 4214 .proc_handler = proc_dointvec,
65f5c7c1 4215 },
c4fd30eb
YH		 4216 {
4217 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4218 .procname = "accept_ra_pinfo",
1ab1457c 4219 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4220 .maxlen = sizeof(int),
4221 .mode = 0644,
6d9f239a 4222 .proc_handler = proc_dointvec,
c4fd30eb 4223 },
930d6ff2
YH		 4224#ifdef CONFIG_IPV6_ROUTER_PREF
4225 {
4226 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4227 .procname = "accept_ra_rtr_pref",
4228 .data = &ipv6_devconf.accept_ra_rtr_pref,
4229 .maxlen = sizeof(int),
4230 .mode = 0644,
6d9f239a 4231 .proc_handler = proc_dointvec,
930d6ff2 4232 },
52e16356
YH		 4233 {
4234 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4235 .procname = "router_probe_interval",
4236 .data = &ipv6_devconf.rtr_probe_interval,
4237 .maxlen = sizeof(int),
4238 .mode = 0644,
6d9f239a
AD		 4239 .proc_handler = proc_dointvec_jiffies,
4240 .strategy = sysctl_jiffies,
52e16356 4241 },
fa03ef38 4242#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4243 {
4244 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4245 .procname = "accept_ra_rt_info_max_plen",
4246 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4247 .maxlen = sizeof(int),
4248 .mode = 0644,
6d9f239a 4249 .proc_handler = proc_dointvec,
09c884d4
YH		 4250 },
4251#endif
930d6ff2 4252#endif
fbea49e1
YH		 4253 {
4254 .ctl_name = NET_IPV6_PROXY_NDP,
4255 .procname = "proxy_ndp",
4256 .data = &ipv6_devconf.proxy_ndp,
4257 .maxlen = sizeof(int),
4258 .mode = 0644,
6d9f239a 4259 .proc_handler = proc_dointvec,
fbea49e1 4260 },
0bcbc926
YH		 4261 {
4262 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4263 .procname = "accept_source_route",
4264 .data = &ipv6_devconf.accept_source_route,
4265 .maxlen = sizeof(int),
4266 .mode = 0644,
6d9f239a 4267 .proc_handler = proc_dointvec,
0bcbc926 4268 },
95c385b4
NH		 4269#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4270 {
4271 .ctl_name = CTL_UNNUMBERED,
4272 .procname = "optimistic_dad",
4273 .data = &ipv6_devconf.optimistic_dad,
4274 .maxlen = sizeof(int),
4275 .mode = 0644,
6d9f239a 4276 .proc_handler = proc_dointvec,
95c385b4
NH		 4277
4278 },
7bc570c8
YH		 4279#endif
4280#ifdef CONFIG_IPV6_MROUTE
4281 {
4282 .ctl_name = CTL_UNNUMBERED,
4283 .procname = "mc_forwarding",
4284 .data = &ipv6_devconf.mc_forwarding,
4285 .maxlen = sizeof(int),
a4e6db07 4286 .mode = 0444,
6d9f239a 4287 .proc_handler = proc_dointvec,
7bc570c8 4288 },
95c385b4 4289#endif
778d80be
YH		 4290 {
4291 .ctl_name = CTL_UNNUMBERED,
4292 .procname = "disable_ipv6",
4293 .data = &ipv6_devconf.disable_ipv6,
4294 .maxlen = sizeof(int),
4295 .mode = 0644,
56d417b1
BH		 4296 .proc_handler = addrconf_sysctl_disable,
4297 .strategy = sysctl_intvec,
778d80be 4298 },
1b34be74
YH		 4299 {
4300 .ctl_name = CTL_UNNUMBERED,
4301 .procname = "accept_dad",
4302 .data = &ipv6_devconf.accept_dad,
4303 .maxlen = sizeof(int),
4304 .mode = 0644,
6d9f239a 4305 .proc_handler = proc_dointvec,
1b34be74 4306 },
1da177e4
LT		 4307 {
4308 .ctl_name = 0, /* sentinel */
4309 }
4310 },
1da177e4
LT		 4311};
4312
bff16c2f
PE		 4313static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4314 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4315{
4316 int i;
1da177e4 4317 struct addrconf_sysctl_table *t;
1da177e4 4318
1dab6222
PE		 4319#define ADDRCONF_CTL_PATH_DEV 3
4320
4321 struct ctl_path addrconf_ctl_path[] = {
4322 { .procname = "net", .ctl_name = CTL_NET, },
4323 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4324 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4325 { /* to be set */ },
4326 { },
4327 };
4328
4329
af879cc7 4330 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4331 if (t == NULL)
f68635e6
PE		 4332 goto out;
4333
1da177e4
LT		 4334 for (i=0; t->addrconf_vars[i].data; i++) {
4335 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4336 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4337 t->addrconf_vars[i].extra2 = net;
1da177e4 4338 }
1da177e4 4339
1ab1457c
YH		 4340 /*
4341 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4342 * by sysctl and we wouldn't want anyone to change it under our feet
4343 * (see SIOCSIFNAME).
1ab1457c 4344 */
1dab6222
PE		 4345 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4346 if (!t->dev_name)
f68635e6 4347 goto free;
1da177e4 4348
1dab6222
PE		 4349 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4350 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4351
bff16c2f 4352 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4353 t->addrconf_vars);
1da177e4
LT		 4354 if (t->sysctl_header == NULL)
4355 goto free_procname;
f68635e6
PE		 4356
4357 p->sysctl = t;
95897312 4358 return 0;
1da177e4 4359
f68635e6 4360free_procname:
1dab6222 4361 kfree(t->dev_name);
f68635e6 4362free:
1da177e4 4363 kfree(t);
f68635e6 4364out:
95897312 4365 return -ENOBUFS;
1da177e4
LT		 4366}
4367
408c4768
PE		 4368static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4369{
4370 struct addrconf_sysctl_table *t;
4371
4372 if (p->sysctl == NULL)
4373 return;
4374
4375 t = p->sysctl;
4376 p->sysctl = NULL;
4377 unregister_sysctl_table(t->sysctl_header);
4378 kfree(t->dev_name);
4379 kfree(t);
4380}
4381
f52295a9
PE		 4382static void addrconf_sysctl_register(struct inet6_dev *idev)
4383{
408c4768
PE		 4384 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4385 NET_IPV6_NEIGH, "ipv6",
4386 &ndisc_ifinfo_sysctl_change,
0686caa3 4387 ndisc_ifinfo_sysctl_strategy);
c346dca1 4388 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
bff16c2f 4389 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4390}
4391
408c4768 4392static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4393{
408c4768
PE		 4394 __addrconf_sysctl_unregister(&idev->cnf);
4395 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4396}
4397
4398
4399#endif
4400
e0da5a48
PE		 4401static int addrconf_init_net(struct net *net)
4402{
4403 int err;
4404 struct ipv6_devconf *all, *dflt;
4405
4406 err = -ENOMEM;
4407 all = &ipv6_devconf;
4408 dflt = &ipv6_devconf_dflt;
4409
4410 if (net != &init_net) {
4411 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4412 if (all == NULL)
4413 goto err_alloc_all;
4414
4415 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4416 if (dflt == NULL)
4417 goto err_alloc_dflt;
56d417b1
BH		 4418 } else {
4419 /* these will be inherited by all namespaces */
4420 dflt->autoconf = ipv6_defaults.autoconf;
4421 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
e0da5a48
PE		 4422 }
4423
4424 net->ipv6.devconf_all = all;
4425 net->ipv6.devconf_dflt = dflt;
4426
4427#ifdef CONFIG_SYSCTL
4428 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4429 NULL, all);
4430 if (err < 0)
4431 goto err_reg_all;
4432
4433 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4434 NULL, dflt);
4435 if (err < 0)
4436 goto err_reg_dflt;
4437#endif
4438 return 0;
4439
4440#ifdef CONFIG_SYSCTL
4441err_reg_dflt:
4442 __addrconf_sysctl_unregister(all);
4443err_reg_all:
4444 kfree(dflt);
4445#endif
4446err_alloc_dflt:
4447 kfree(all);
4448err_alloc_all:
4449 return err;
4450}
4451
4452static void addrconf_exit_net(struct net *net)
4453{
4454#ifdef CONFIG_SYSCTL
4455 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4456 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4457#endif
4458 if (net != &init_net) {
4459 kfree(net->ipv6.devconf_dflt);
4460 kfree(net->ipv6.devconf_all);
4461 }
4462}
4463
4464static struct pernet_operations addrconf_ops = {
4465 .init = addrconf_init_net,
4466 .exit = addrconf_exit_net,
4467};
4468
1da177e4
LT		 4469/*
4470 * Device notifier
4471 */
4472
4473int register_inet6addr_notifier(struct notifier_block *nb)
4474{
1ab1457c 4475 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4476}
4477
7159039a
YH		 4478EXPORT_SYMBOL(register_inet6addr_notifier);
4479
1da177e4
LT		 4480int unregister_inet6addr_notifier(struct notifier_block *nb)
4481{
1ab1457c 4482 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4483}
4484
7159039a
YH		 4485EXPORT_SYMBOL(unregister_inet6addr_notifier);
4486
1da177e4
LT		 4487/*
4488 * Init / cleanup code
4489 */
4490
4491int __init addrconf_init(void)
4492{
2a8cc6c8
YH		 4493 int err;
4494
4495 if ((err = ipv6_addr_label_init()) < 0) {
4496 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4497 err);
4498 return err;
4499 }
1da177e4 4500
e0da5a48
PE		 4501 register_pernet_subsys(&addrconf_ops);
4502
1da177e4
LT		 4503 /* The addrconf netdev notifier requires that loopback_dev
4504 * has it's ipv6 private information allocated and setup
4505 * before it can bring up and give link-local addresses
4506 * to other devices which are up.
4507 *
4508 * Unfortunately, loopback_dev is not necessarily the first
4509 * entry in the global dev_base list of net devices. In fact,
4510 * it is likely to be the very last entry on that list.
4511 * So this causes the notifier registry below to try and
4512 * give link-local addresses to all devices besides loopback_dev
4513 * first, then loopback_dev, which cases all the non-loopback_dev
4514 * devices to fail to get a link-local address.
4515 *
4516 * So, as a temporary fix, allocate the ipv6 structure for
4517 * loopback_dev first by hand.
4518 * Longer term, all of the dependencies ipv6 has upon the loopback
4519 * device and it being up should be removed.
4520 */
4521 rtnl_lock();
2774c7ab 4522 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4523 err = -ENOMEM;
4524 rtnl_unlock();
4525 if (err)
e0da5a48 4526 goto errlo;
1da177e4
LT		 4527
4528 register_netdevice_notifier(&ipv6_dev_notf);
4529
1da177e4 4530 addrconf_verify(0);
c127ea2c
TG		 4531
4532 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4533 if (err < 0)
4534 goto errout;
4535
4536 /* Only the first call to __rtnl_register can fail */
4537 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4538 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4539 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4540 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4541 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4542
2a8cc6c8
YH		 4543 ipv6_addr_label_rtnl_register();
4544
1da177e4 4545 return 0;
c127ea2c
TG		 4546errout:
4547 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4548errlo:
4549 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4550
4551 return err;
1da177e4
LT		 4552}
4553
09f7709f 4554void addrconf_cleanup(void)
1da177e4 4555{
1ab1457c 4556 struct inet6_ifaddr *ifa;
176c39af 4557 struct net_device *dev;
1da177e4
LT		 4558 int i;
4559
4560 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48 4561 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4562
4563 rtnl_lock();
4564
176c39af
DL		 4565 /* clean dev list */
4566 for_each_netdev(&init_net, dev) {
4567 if (__in6_dev_get(dev) == NULL)
4568 continue;
4569 addrconf_ifdown(dev, 1);
4570 }
4571 addrconf_ifdown(init_net.loopback_dev, 2);
4572
1da177e4
LT		 4573 /*
4574 * Check hash table.
4575 */
1da177e4
LT		 4576 write_lock_bh(&addrconf_hash_lock);
4577 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4578 for (ifa=inet6_addr_lst[i]; ifa; ) {
4579 struct inet6_ifaddr *bifa;
4580
4581 bifa = ifa;
4582 ifa = ifa->lst_next;
4583 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4584 /* Do not free it; something is wrong.
4585 Now we can investigate it with debugger.
4586 */
4587 }
4588 }
4589 write_unlock_bh(&addrconf_hash_lock);
4590
4591 del_timer(&addr_chk_timer);
1da177e4 4592 rtnl_unlock();
1da177e4 4593}
Clone of davem's net-next-2.6 tree