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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[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>
43#include <linux/socket.h>
44#include <linux/sockios.h>
1da177e4
LT		 45#include <linux/net.h>
46#include <linux/in6.h>
47#include <linux/netdevice.h>
1823730f 48#include <linux/if_addr.h>
1da177e4
LT		 49#include <linux/if_arp.h>
50#include <linux/if_arcnet.h>
51#include <linux/if_infiniband.h>
52#include <linux/route.h>
53#include <linux/inetdevice.h>
54#include <linux/init.h>
55#ifdef CONFIG_SYSCTL
56#include <linux/sysctl.h>
57#endif
4fc268d2 58#include <linux/capability.h>
1da177e4
LT		 59#include <linux/delay.h>
60#include <linux/notifier.h>
543537bd 61#include <linux/string.h>
1da177e4 62
457c4cbc 63#include <net/net_namespace.h>
1da177e4
LT		 64#include <net/sock.h>
65#include <net/snmp.h>
66
67#include <net/ipv6.h>
68#include <net/protocol.h>
69#include <net/ndisc.h>
70#include <net/ip6_route.h>
71#include <net/addrconf.h>
72#include <net/tcp.h>
73#include <net/ip.h>
5d620266 74#include <net/netlink.h>
f24e3d65 75#include <net/pkt_sched.h>
1da177e4
LT		 76#include <linux/if_tunnel.h>
77#include <linux/rtnetlink.h>
78
79#ifdef CONFIG_IPV6_PRIVACY
80#include <linux/random.h>
1da177e4
LT		 81#endif
82
83#include <asm/uaccess.h>
7f7d9a6b 84#include <asm/unaligned.h>
1da177e4
LT		 85
86#include <linux/proc_fs.h>
87#include <linux/seq_file.h>
88
89/* Set to 3 to get tracing... */
90#define ACONF_DEBUG 2
91
92#if ACONF_DEBUG >= 3
93#define ADBG(x) printk x
94#else
95#define ADBG(x)
96#endif
97
98#define INFINITY_LIFE_TIME 0xFFFFFFFF
99#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
100
101#ifdef CONFIG_SYSCTL
f52295a9 102static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 103static void addrconf_sysctl_unregister(struct inet6_dev *idev);
104#else
105static inline void addrconf_sysctl_register(struct inet6_dev *idev)
106{
107}
108
109static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
110{
111}
1da177e4
LT		 112#endif
113
114#ifdef CONFIG_IPV6_PRIVACY
115static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 116static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 117static void ipv6_regen_rndid(unsigned long data);
118
119static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 120#endif
121
1b34be74 122static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 123static int ipv6_count_addresses(struct inet6_dev *idev);
124
125/*
126 * Configured unicast address hash table
127 */
128static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
129static DEFINE_RWLOCK(addrconf_hash_lock);
130
1da177e4
LT		 131static void addrconf_verify(unsigned long);
132
8d06afab 133static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 134static DEFINE_SPINLOCK(addrconf_verify_lock);
135
136static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
137static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
138
139static int addrconf_ifdown(struct net_device *dev, int how);
140
e431b8c0 141static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 142static void addrconf_dad_timer(unsigned long data);
143static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 144static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 145static void addrconf_rs_timer(unsigned long data);
146static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
147static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148
1ab1457c 149static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 150 struct prefix_info *pinfo);
06bfe655
DL		 151static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
152 struct net_device *dev);
1da177e4 153
e041c683 154static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 155
ab32ea5d 156struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 157 .forwarding = 0,
158 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
159 .mtu6 = IPV6_MIN_MTU,
160 .accept_ra = 1,
161 .accept_redirects = 1,
162 .autoconf = 1,
163 .force_mld_version = 0,
164 .dad_transmits = 1,
165 .rtr_solicits = MAX_RTR_SOLICITATIONS,
166 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
167 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
168#ifdef CONFIG_IPV6_PRIVACY
169 .use_tempaddr = 0,
170 .temp_valid_lft = TEMP_VALID_LIFETIME,
171 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
172 .regen_max_retry = REGEN_MAX_RETRY,
173 .max_desync_factor = MAX_DESYNC_FACTOR,
174#endif
175 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 176 .accept_ra_defrtr = 1,
c4fd30eb 177 .accept_ra_pinfo = 1,
930d6ff2
YH		 178#ifdef CONFIG_IPV6_ROUTER_PREF
179 .accept_ra_rtr_pref = 1,
52e16356 180 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 181#ifdef CONFIG_IPV6_ROUTE_INFO
182 .accept_ra_rt_info_max_plen = 0,
183#endif
930d6ff2 184#endif
fbea49e1 185 .proxy_ndp = 0,
0bcbc926 186 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 187 .disable_ipv6 = 0,
1b34be74 188 .accept_dad = 1,
1da177e4
LT		 189};
190
ab32ea5d 191static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 192 .forwarding = 0,
193 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
194 .mtu6 = IPV6_MIN_MTU,
195 .accept_ra = 1,
196 .accept_redirects = 1,
197 .autoconf = 1,
198 .dad_transmits = 1,
199 .rtr_solicits = MAX_RTR_SOLICITATIONS,
200 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
201 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
202#ifdef CONFIG_IPV6_PRIVACY
203 .use_tempaddr = 0,
204 .temp_valid_lft = TEMP_VALID_LIFETIME,
205 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
206 .regen_max_retry = REGEN_MAX_RETRY,
207 .max_desync_factor = MAX_DESYNC_FACTOR,
208#endif
209 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 210 .accept_ra_defrtr = 1,
c4fd30eb 211 .accept_ra_pinfo = 1,
930d6ff2
YH		 212#ifdef CONFIG_IPV6_ROUTER_PREF
213 .accept_ra_rtr_pref = 1,
52e16356 214 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 215#ifdef CONFIG_IPV6_ROUTE_INFO
216 .accept_ra_rt_info_max_plen = 0,
217#endif
930d6ff2 218#endif
fbea49e1 219 .proxy_ndp = 0,
0bcbc926 220 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 221 .disable_ipv6 = 0,
1b34be74 222 .accept_dad = 1,
1da177e4
LT		 223};
224
225/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 226const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 227const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 228const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
229const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 230
f24e3d65 231/* Check if a valid qdisc is available */
05297949 232static inline bool addrconf_qdisc_ok(const struct net_device *dev)
f24e3d65 233{
05297949 234 return !qdisc_tx_is_noop(dev);
f24e3d65
MC		 235}
236
2b5ead46
YH		 237/* Check if a route is valid prefix route */
238static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
239{
240 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
241}
242
1da177e4
LT		 243static void addrconf_del_timer(struct inet6_ifaddr *ifp)
244{
245 if (del_timer(&ifp->timer))
246 __in6_ifa_put(ifp);
247}
248
249enum addrconf_timer_t
250{
251 AC_NONE,
252 AC_DAD,
253 AC_RS,
254};
255
256static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
257 enum addrconf_timer_t what,
258 unsigned long when)
259{
260 if (!del_timer(&ifp->timer))
261 in6_ifa_hold(ifp);
262
263 switch (what) {
264 case AC_DAD:
265 ifp->timer.function = addrconf_dad_timer;
266 break;
267 case AC_RS:
268 ifp->timer.function = addrconf_rs_timer;
269 break;
270 default:;
271 }
272 ifp->timer.expires = jiffies + when;
273 add_timer(&ifp->timer);
274}
275
7f7d9a6b
HX		 276static int snmp6_alloc_dev(struct inet6_dev *idev)
277{
7f7d9a6b 278 if (snmp_mib_init((void **)idev->stats.ipv6,
c69bce20 279 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b
HX		 280 goto err_ip;
281 if (snmp_mib_init((void **)idev->stats.icmpv6,
c69bce20 282 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 283 goto err_icmp;
14878f75 284 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
c69bce20 285 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 286 goto err_icmpmsg;
7f7d9a6b
HX		 287
288 return 0;
289
14878f75
DS		 290err_icmpmsg:
291 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 292err_icmp:
293 snmp_mib_free((void **)idev->stats.ipv6);
294err_ip:
aaf70ec7 295 return -ENOMEM;
7f7d9a6b
HX		 296}
297
16910b98 298static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 299{
14878f75 300 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 301 snmp_mib_free((void **)idev->stats.icmpv6);
302 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 303}
304
1da177e4
LT		 305/* Nobody refers to this device, we may destroy it. */
306
8814c4b5
YH		 307static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
308{
309 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
310 kfree(idev);
311}
312
1da177e4
LT		 313void in6_dev_finish_destroy(struct inet6_dev *idev)
314{
315 struct net_device *dev = idev->dev;
316 BUG_TRAP(idev->addr_list==NULL);
317 BUG_TRAP(idev->mc_list==NULL);
318#ifdef NET_REFCNT_DEBUG
319 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
320#endif
321 dev_put(dev);
322 if (!idev->dead) {
323 printk("Freeing alive inet6 device %p\n", idev);
324 return;
325 }
326 snmp6_free_dev(idev);
8814c4b5 327 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 328}
329
7159039a
YH		 330EXPORT_SYMBOL(in6_dev_finish_destroy);
331
1da177e4
LT		 332static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
333{
334 struct inet6_dev *ndev;
335
336 ASSERT_RTNL();
337
338 if (dev->mtu < IPV6_MIN_MTU)
339 return NULL;
340
1ab1457c 341 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 342
1ab1457c
YH		 343 if (ndev == NULL)
344 return NULL;
322f74a4
IO		 345
346 rwlock_init(&ndev->lock);
347 ndev->dev = dev;
c346dca1 348 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 349 ndev->cnf.mtu6 = dev->mtu;
350 ndev->cnf.sysctl = NULL;
351 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
352 if (ndev->nd_parms == NULL) {
353 kfree(ndev);
354 return NULL;
355 }
0187bdfb
BH		 356 if (ndev->cnf.forwarding)
357 dev_disable_lro(dev);
322f74a4
IO		 358 /* We refer to the device */
359 dev_hold(dev);
1da177e4 360
322f74a4
IO		 361 if (snmp6_alloc_dev(ndev) < 0) {
362 ADBG((KERN_WARNING
363 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 364 __func__, dev->name));
322f74a4
IO		 365 neigh_parms_release(&nd_tbl, ndev->nd_parms);
366 ndev->dead = 1;
367 in6_dev_finish_destroy(ndev);
368 return NULL;
369 }
1da177e4 370
322f74a4
IO		 371 if (snmp6_register_dev(ndev) < 0) {
372 ADBG((KERN_WARNING
373 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 374 __func__, dev->name));
322f74a4
IO		 375 neigh_parms_release(&nd_tbl, ndev->nd_parms);
376 ndev->dead = 1;
377 in6_dev_finish_destroy(ndev);
378 return NULL;
379 }
380
381 /* One reference from device. We must do this before
382 * we invoke __ipv6_regen_rndid().
383 */
384 in6_dev_hold(ndev);
1da177e4 385
1b34be74
YH		 386 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
387 ndev->cnf.accept_dad = -1;
388
b077d7ab
YH		 389#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
390 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
391 printk(KERN_INFO
392 "%s: Disabled Multicast RS\n",
393 dev->name);
394 ndev->cnf.rtr_solicits = 0;
395 }
396#endif
397
1da177e4 398#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 399 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 400 if ((dev->flags&IFF_LOOPBACK) ||
401 dev->type == ARPHRD_TUNNEL ||
9625ed72 402 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 403 dev->type == ARPHRD_SIT ||
0be669bb 404 dev->type == ARPHRD_NONE) {
322f74a4
IO		 405 printk(KERN_INFO
406 "%s: Disabled Privacy Extensions\n",
407 dev->name);
408 ndev->cnf.use_tempaddr = -1;
409 } else {
410 in6_dev_hold(ndev);
411 ipv6_regen_rndid((unsigned long) ndev);
412 }
1da177e4
LT		 413#endif
414
f24e3d65 415 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 416 ndev->if_flags |= IF_READY;
417
322f74a4
IO		 418 ipv6_mc_init_dev(ndev);
419 ndev->tstamp = jiffies;
f52295a9 420 addrconf_sysctl_register(ndev);
30c4cf57
DS		 421 /* protected by rtnl_lock */
422 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 423
424 /* Join all-node multicast group */
f3ee4010 425 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 426
1da177e4
LT		 427 return ndev;
428}
429
cee89473 430static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 431{
432 struct inet6_dev *idev;
433
434 ASSERT_RTNL();
435
436 if ((idev = __in6_dev_get(dev)) == NULL) {
437 if ((idev = ipv6_add_dev(dev)) == NULL)
438 return NULL;
439 }
c5e33bdd 440
1da177e4
LT		 441 if (dev->flags&IFF_UP)
442 ipv6_mc_up(idev);
443 return idev;
444}
445
446#ifdef CONFIG_SYSCTL
447static void dev_forward_change(struct inet6_dev *idev)
448{
449 struct net_device *dev;
450 struct inet6_ifaddr *ifa;
1da177e4
LT		 451
452 if (!idev)
453 return;
454 dev = idev->dev;
0187bdfb
BH		 455 if (idev->cnf.forwarding)
456 dev_disable_lro(dev);
1da177e4 457 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 458 if (idev->cnf.forwarding)
f3ee4010 459 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 460 else
f3ee4010 461 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4
LT		 462 }
463 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 464 if (ifa->flags&IFA_F_TENTATIVE)
465 continue;
1da177e4
LT		 466 if (idev->cnf.forwarding)
467 addrconf_join_anycast(ifa);
468 else
469 addrconf_leave_anycast(ifa);
470 }
471}
472
473
e186932b 474static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 475{
476 struct net_device *dev;
477 struct inet6_dev *idev;
478
479 read_lock(&dev_base_lock);
bff16c2f 480 for_each_netdev(net, dev) {
8814c4b5 481 rcu_read_lock();
1da177e4
LT		 482 idev = __in6_dev_get(dev);
483 if (idev) {
e186932b
PE		 484 int changed = (!idev->cnf.forwarding) ^ (!newf);
485 idev->cnf.forwarding = newf;
1da177e4
LT		 486 if (changed)
487 dev_forward_change(idev);
488 }
8814c4b5 489 rcu_read_unlock();
1da177e4
LT		 490 }
491 read_unlock(&dev_base_lock);
492}
c8fecf22
PE		 493
494static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
495{
bff16c2f
PE		 496 struct net *net;
497
498 net = (struct net *)table->extra2;
441fc2a2 499 if (p == &net->ipv6.devconf_dflt->forwarding)
c8fecf22
PE		 500 return;
501
0187bdfb 502 rtnl_lock();
e186932b
PE		 503 if (p == &net->ipv6.devconf_all->forwarding) {
504 __s32 newf = net->ipv6.devconf_all->forwarding;
505 net->ipv6.devconf_dflt->forwarding = newf;
506 addrconf_forward_change(net, newf);
c8fecf22
PE		 507 } else if ((!*p) ^ (!old))
508 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 509 rtnl_unlock();
c8fecf22
PE		 510
511 if (*p)
7b4da532 512 rt6_purge_dflt_routers(net);
c8fecf22 513}
1da177e4
LT		 514#endif
515
516/* Nobody refers to this ifaddr, destroy it */
517
518void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
519{
520 BUG_TRAP(ifp->if_next==NULL);
521 BUG_TRAP(ifp->lst_next==NULL);
522#ifdef NET_REFCNT_DEBUG
523 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
524#endif
525
526 in6_dev_put(ifp->idev);
527
528 if (del_timer(&ifp->timer))
529 printk("Timer is still running, when freeing ifa=%p\n", ifp);
530
531 if (!ifp->dead) {
532 printk("Freeing alive inet6 address %p\n", ifp);
533 return;
534 }
535 dst_release(&ifp->rt->u.dst);
536
537 kfree(ifp);
538}
539
e55ffac6
BH		 540static void
541ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
542{
543 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 544 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 545
546 /*
547 * Each device address list is sorted in order of scope -
548 * global before linklocal.
549 */
550 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
551 ifap = &ifa->if_next) {
8a6ce0c0 552 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 553 break;
554 }
555
556 ifp->if_next = *ifap;
557 *ifap = ifp;
558}
559
3eb84f49
YH		 560/*
561 * Hash function taken from net_alias.c
562 */
563static u8 ipv6_addr_hash(const struct in6_addr *addr)
564{
565 __u32 word;
566
567 /*
568 * We perform the hash function over the last 64 bits of the address
569 * This will include the IEEE address token on links that support it.
570 */
571
572 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
573 word ^= (word >> 16);
574 word ^= (word >> 8);
575
576 return ((word ^ (word >> 4)) & 0x0f);
577}
578
1da177e4
LT		 579/* On success it returns ifp with increased reference count */
580
581static struct inet6_ifaddr *
582ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 583 int scope, u32 flags)
1da177e4
LT		 584{
585 struct inet6_ifaddr *ifa = NULL;
586 struct rt6_info *rt;
587 int hash;
588 int err = 0;
d68b8270
YH		 589 int addr_type = ipv6_addr_type(addr);
590
591 if (addr_type == IPV6_ADDR_ANY ||
592 addr_type & IPV6_ADDR_MULTICAST ||
593 (!(idev->dev->flags & IFF_LOOPBACK) &&
594 addr_type & IPV6_ADDR_LOOPBACK))
595 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 596
8814c4b5 597 rcu_read_lock_bh();
1da177e4
LT		 598 if (idev->dead) {
599 err = -ENODEV; /*XXX*/
600 goto out2;
601 }
602
603 write_lock(&addrconf_hash_lock);
604
605 /* Ignore adding duplicate addresses on an interface */
c346dca1 606 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 607 ADBG(("ipv6_add_addr: already assigned\n"));
608 err = -EEXIST;
609 goto out;
610 }
611
322f74a4 612 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 613
614 if (ifa == NULL) {
615 ADBG(("ipv6_add_addr: malloc failed\n"));
616 err = -ENOBUFS;
617 goto out;
618 }
619
620 rt = addrconf_dst_alloc(idev, addr, 0);
621 if (IS_ERR(rt)) {
622 err = PTR_ERR(rt);
623 goto out;
624 }
625
1da177e4
LT		 626 ipv6_addr_copy(&ifa->addr, addr);
627
628 spin_lock_init(&ifa->lock);
629 init_timer(&ifa->timer);
630 ifa->timer.data = (unsigned long) ifa;
631 ifa->scope = scope;
632 ifa->prefix_len = pfxlen;
633 ifa->flags = flags | IFA_F_TENTATIVE;
634 ifa->cstamp = ifa->tstamp = jiffies;
635
57f5f544
KF		 636 ifa->rt = rt;
637
95c385b4
NH		 638 /*
639 * part one of RFC 4429, section 3.3
640 * We should not configure an address as
641 * optimistic if we do not yet know the link
642 * layer address of our nexhop router
643 */
644
645 if (rt->rt6i_nexthop == NULL)
646 ifa->flags &= ~IFA_F_OPTIMISTIC;
647
1da177e4
LT		 648 ifa->idev = idev;
649 in6_dev_hold(idev);
650 /* For caller */
651 in6_ifa_hold(ifa);
652
653 /* Add to big hash table */
654 hash = ipv6_addr_hash(addr);
655
656 ifa->lst_next = inet6_addr_lst[hash];
657 inet6_addr_lst[hash] = ifa;
658 in6_ifa_hold(ifa);
659 write_unlock(&addrconf_hash_lock);
660
661 write_lock(&idev->lock);
662 /* Add to inet6_dev unicast addr list. */
e55ffac6 663 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 664
665#ifdef CONFIG_IPV6_PRIVACY
666 if (ifa->flags&IFA_F_TEMPORARY) {
667 ifa->tmp_next = idev->tempaddr_list;
668 idev->tempaddr_list = ifa;
669 in6_ifa_hold(ifa);
670 }
671#endif
672
1da177e4
LT		 673 in6_ifa_hold(ifa);
674 write_unlock(&idev->lock);
675out2:
8814c4b5 676 rcu_read_unlock_bh();
1da177e4 677
fd92833a 678 if (likely(err == 0))
e041c683 679 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 680 else {
681 kfree(ifa);
682 ifa = ERR_PTR(err);
683 }
684
685 return ifa;
686out:
687 write_unlock(&addrconf_hash_lock);
688 goto out2;
689}
690
691/* This function wants to get referenced ifp and releases it before return */
692
693static void ipv6_del_addr(struct inet6_ifaddr *ifp)
694{
695 struct inet6_ifaddr *ifa, **ifap;
696 struct inet6_dev *idev = ifp->idev;
697 int hash;
698 int deleted = 0, onlink = 0;
699 unsigned long expires = jiffies;
700
701 hash = ipv6_addr_hash(&ifp->addr);
702
703 ifp->dead = 1;
704
705 write_lock_bh(&addrconf_hash_lock);
706 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
707 ifap = &ifa->lst_next) {
708 if (ifa == ifp) {
709 *ifap = ifa->lst_next;
710 __in6_ifa_put(ifp);
711 ifa->lst_next = NULL;
712 break;
713 }
714 }
715 write_unlock_bh(&addrconf_hash_lock);
716
717 write_lock_bh(&idev->lock);
718#ifdef CONFIG_IPV6_PRIVACY
719 if (ifp->flags&IFA_F_TEMPORARY) {
720 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
721 ifap = &ifa->tmp_next) {
722 if (ifa == ifp) {
723 *ifap = ifa->tmp_next;
724 if (ifp->ifpub) {
725 in6_ifa_put(ifp->ifpub);
726 ifp->ifpub = NULL;
727 }
728 __in6_ifa_put(ifp);
729 ifa->tmp_next = NULL;
730 break;
731 }
732 }
733 }
734#endif
735
1d142804 736 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 737 if (ifa == ifp) {
738 *ifap = ifa->if_next;
739 __in6_ifa_put(ifp);
740 ifa->if_next = NULL;
741 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
742 break;
743 deleted = 1;
1d142804 744 continue;
1da177e4
LT		 745 } else if (ifp->flags & IFA_F_PERMANENT) {
746 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
747 ifp->prefix_len)) {
748 if (ifa->flags & IFA_F_PERMANENT) {
749 onlink = 1;
750 if (deleted)
751 break;
752 } else {
753 unsigned long lifetime;
754
755 if (!onlink)
756 onlink = -1;
757
758 spin_lock(&ifa->lock);
4bed72e4
YH		 759
760 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
761 /*
762 * Note: Because this address is
763 * not permanent, lifetime <
764 * LONG_MAX / HZ here.
765 */
1da177e4
LT		 766 if (time_before(expires,
767 ifa->tstamp + lifetime * HZ))
768 expires = ifa->tstamp + lifetime * HZ;
769 spin_unlock(&ifa->lock);
770 }
771 }
772 }
1d142804 773 ifap = &ifa->if_next;
1da177e4
LT		 774 }
775 write_unlock_bh(&idev->lock);
776
b2238566
AV		 777 addrconf_del_timer(ifp);
778
1da177e4
LT		 779 ipv6_ifa_notify(RTM_DELADDR, ifp);
780
e041c683 781 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 782
1da177e4
LT		 783 /*
784 * Purge or update corresponding prefix
785 *
786 * 1) we don't purge prefix here if address was not permanent.
787 * prefix is managed by its own lifetime.
788 * 2) if there're no addresses, delete prefix.
789 * 3) if there're still other permanent address(es),
790 * corresponding prefix is still permanent.
791 * 4) otherwise, update prefix lifetime to the
792 * longest valid lifetime among the corresponding
793 * addresses on the device.
794 * Note: subsequent RA will update lifetime.
795 *
796 * --yoshfuji
797 */
798 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
799 struct in6_addr prefix;
800 struct rt6_info *rt;
c346dca1 801 struct net *net = dev_net(ifp->idev->dev);
1da177e4 802 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 803 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 804
2b5ead46 805 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 806 if (onlink == 0) {
e0a1ad73 807 ip6_del_rt(rt);
1da177e4
LT		 808 rt = NULL;
809 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
810 rt->rt6i_expires = expires;
811 rt->rt6i_flags |= RTF_EXPIRES;
812 }
813 }
814 dst_release(&rt->u.dst);
815 }
816
817 in6_ifa_put(ifp);
818}
819
820#ifdef CONFIG_IPV6_PRIVACY
821static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
822{
823 struct inet6_dev *idev = ifp->idev;
824 struct in6_addr addr, *tmpaddr;
825 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 826 unsigned long regen_advance;
1da177e4
LT		 827 int tmp_plen;
828 int ret = 0;
829 int max_addresses;
95c385b4 830 u32 addr_flags;
1da177e4
LT		 831
832 write_lock(&idev->lock);
833 if (ift) {
834 spin_lock_bh(&ift->lock);
835 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
836 spin_unlock_bh(&ift->lock);
837 tmpaddr = &addr;
838 } else {
839 tmpaddr = NULL;
840 }
841retry:
842 in6_dev_hold(idev);
843 if (idev->cnf.use_tempaddr <= 0) {
844 write_unlock(&idev->lock);
845 printk(KERN_INFO
846 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
847 in6_dev_put(idev);
848 ret = -1;
849 goto out;
850 }
851 spin_lock_bh(&ifp->lock);
852 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
853 idev->cnf.use_tempaddr = -1; /*XXX*/
854 spin_unlock_bh(&ifp->lock);
855 write_unlock(&idev->lock);
856 printk(KERN_WARNING
857 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
858 in6_dev_put(idev);
859 ret = -1;
860 goto out;
861 }
862 in6_ifa_hold(ifp);
863 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
864 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
865 spin_unlock_bh(&ifp->lock);
866 write_unlock(&idev->lock);
867 printk(KERN_WARNING
868 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
869 in6_ifa_put(ifp);
870 in6_dev_put(idev);
871 ret = -1;
872 goto out;
873 }
874 memcpy(&addr.s6_addr[8], idev->rndid, 8);
875 tmp_valid_lft = min_t(__u32,
876 ifp->valid_lft,
877 idev->cnf.temp_valid_lft);
1ab1457c
YH		 878 tmp_prefered_lft = min_t(__u32,
879 ifp->prefered_lft,
1da177e4
LT		 880 idev->cnf.temp_prefered_lft - desync_factor / HZ);
881 tmp_plen = ifp->prefix_len;
882 max_addresses = idev->cnf.max_addresses;
883 tmp_cstamp = ifp->cstamp;
884 tmp_tstamp = ifp->tstamp;
885 spin_unlock_bh(&ifp->lock);
886
eac55bf9
BB		 887 regen_advance = idev->cnf.regen_max_retry *
888 idev->cnf.dad_transmits *
889 idev->nd_parms->retrans_time / HZ;
1da177e4 890 write_unlock(&idev->lock);
95c385b4 891
eac55bf9
BB		 892 /* A temporary address is created only if this calculated Preferred
893 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
894 * an implementation must not create a temporary address with a zero
895 * Preferred Lifetime.
896 */
897 if (tmp_prefered_lft <= regen_advance) {
898 in6_ifa_put(ifp);
899 in6_dev_put(idev);
900 ret = -1;
901 goto out;
902 }
903
95c385b4
NH		 904 addr_flags = IFA_F_TEMPORARY;
905 /* set in addrconf_prefix_rcv() */
906 if (ifp->flags & IFA_F_OPTIMISTIC)
907 addr_flags |= IFA_F_OPTIMISTIC;
908
1da177e4 909 ift = !max_addresses ||
1ab1457c 910 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 911 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 912 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
913 addr_flags) : NULL;
1da177e4
LT		 914 if (!ift || IS_ERR(ift)) {
915 in6_ifa_put(ifp);
916 in6_dev_put(idev);
917 printk(KERN_INFO
918 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
919 tmpaddr = &addr;
920 write_lock(&idev->lock);
921 goto retry;
922 }
923
924 spin_lock_bh(&ift->lock);
925 ift->ifpub = ifp;
926 ift->valid_lft = tmp_valid_lft;
927 ift->prefered_lft = tmp_prefered_lft;
928 ift->cstamp = tmp_cstamp;
929 ift->tstamp = tmp_tstamp;
930 spin_unlock_bh(&ift->lock);
931
932 addrconf_dad_start(ift, 0);
933 in6_ifa_put(ift);
934 in6_dev_put(idev);
935out:
936 return ret;
937}
938#endif
939
940/*
072047e4 941 * Choose an appropriate source address (RFC3484)
1da177e4 942 */
a9b05723
YH		 943enum {
944 IPV6_SADDR_RULE_INIT = 0,
945 IPV6_SADDR_RULE_LOCAL,
946 IPV6_SADDR_RULE_SCOPE,
947 IPV6_SADDR_RULE_PREFERRED,
948#ifdef CONFIG_IPV6_MIP6
949 IPV6_SADDR_RULE_HOA,
950#endif
951 IPV6_SADDR_RULE_OIF,
952 IPV6_SADDR_RULE_LABEL,
953#ifdef CONFIG_IPV6_PRIVACY
954 IPV6_SADDR_RULE_PRIVACY,
955#endif
956 IPV6_SADDR_RULE_ORCHID,
957 IPV6_SADDR_RULE_PREFIX,
958 IPV6_SADDR_RULE_MAX
959};
960
072047e4 961struct ipv6_saddr_score {
a9b05723
YH		 962 int rule;
963 int addr_type;
964 struct inet6_ifaddr *ifa;
965 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
966 int scopedist;
967 int matchlen;
072047e4
YH		 968};
969
a9b05723 970struct ipv6_saddr_dst {
9acd9f3a 971 const struct in6_addr *addr;
a9b05723
YH		 972 int ifindex;
973 int scope;
974 int label;
7cbca67c 975 unsigned int prefs;
a9b05723 976};
072047e4 977
b6f99a21 978static inline int ipv6_saddr_preferred(int type)
1da177e4 979{
072047e4
YH		 980 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
981 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
982 return 1;
983 return 0;
1da177e4
LT		 984}
985
3de23255
BT		 986static int ipv6_get_saddr_eval(struct net *net,
987 struct ipv6_saddr_score *score,
a9b05723
YH		 988 struct ipv6_saddr_dst *dst,
989 int i)
990{
991 int ret;
992
993 if (i <= score->rule) {
994 switch (i) {
995 case IPV6_SADDR_RULE_SCOPE:
996 ret = score->scopedist;
997 break;
998 case IPV6_SADDR_RULE_PREFIX:
999 ret = score->matchlen;
1000 break;
1001 default:
1002 ret = !!test_bit(i, score->scorebits);
1003 }
1004 goto out;
1005 }
1006
1007 switch (i) {
1008 case IPV6_SADDR_RULE_INIT:
1009 /* Rule 0: remember if hiscore is not ready yet */
1010 ret = !!score->ifa;
1011 break;
1012 case IPV6_SADDR_RULE_LOCAL:
1013 /* Rule 1: Prefer same address */
1014 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1015 break;
1016 case IPV6_SADDR_RULE_SCOPE:
1017 /* Rule 2: Prefer appropriate scope
1018 *
1019 * ret
1020 * ^
1021 * -1 | d 15
1022 * ---+--+-+---> scope
1023 * |
1024 * | d is scope of the destination.
1025 * B-d | \
1026 * | \ <- smaller scope is better if
1027 * B-15 | \ if scope is enough for destinaion.
1028 * | ret = B - scope (-1 <= scope >= d <= 15).
1029 * d-C-1 | /
1030 * |/ <- greater is better
1031 * -C / if scope is not enough for destination.
1032 * /| ret = scope - C (-1 <= d < scope <= 15).
1033 *
1034 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1035 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1036 * Assume B = 0 and we get C > 29.
1037 */
1038 ret = __ipv6_addr_src_scope(score->addr_type);
1039 if (ret >= dst->scope)
1040 ret = -ret;
1041 else
1042 ret -= 128; /* 30 is enough */
1043 score->scopedist = ret;
1044 break;
1045 case IPV6_SADDR_RULE_PREFERRED:
1046 /* Rule 3: Avoid deprecated and optimistic addresses */
1047 ret = ipv6_saddr_preferred(score->addr_type) ||
1048 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1049 break;
1050#ifdef CONFIG_IPV6_MIP6
1051 case IPV6_SADDR_RULE_HOA:
7cbca67c 1052 {
a9b05723 1053 /* Rule 4: Prefer home address */
7cbca67c
YH		 1054 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1055 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1056 break;
7cbca67c 1057 }
a9b05723
YH		 1058#endif
1059 case IPV6_SADDR_RULE_OIF:
1060 /* Rule 5: Prefer outgoing interface */
1061 ret = (!dst->ifindex ||
1062 dst->ifindex == score->ifa->idev->dev->ifindex);
1063 break;
1064 case IPV6_SADDR_RULE_LABEL:
1065 /* Rule 6: Prefer matching label */
3de23255
BT		 1066 ret = ipv6_addr_label(net,
1067 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1068 score->ifa->idev->dev->ifindex) == dst->label;
1069 break;
1070#ifdef CONFIG_IPV6_PRIVACY
1071 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1072 {
a9b05723
YH		 1073 /* Rule 7: Prefer public address
1074 * Note: prefer temprary address if use_tempaddr >= 2
1075 */
7cbca67c
YH		 1076 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1077 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1078 score->ifa->idev->cnf.use_tempaddr >= 2;
1079 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1080 break;
7cbca67c 1081 }
a9b05723
YH		 1082#endif
1083 case IPV6_SADDR_RULE_ORCHID:
1084 /* Rule 8-: Prefer ORCHID vs ORCHID or
1085 * non-ORCHID vs non-ORCHID
1086 */
1087 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1088 ipv6_addr_orchid(dst->addr));
1089 break;
1090 case IPV6_SADDR_RULE_PREFIX:
1091 /* Rule 8: Use longest matching prefix */
1092 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1093 dst->addr);
1094 break;
1095 default:
1096 ret = 0;
1097 }
1098
1099 if (ret)
1100 __set_bit(i, score->scorebits);
1101 score->rule = i;
1102out:
1103 return ret;
1104}
1105
1106int ipv6_dev_get_saddr(struct net_device *dst_dev,
9acd9f3a 1107 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1108 struct in6_addr *saddr)
1da177e4 1109{
a9b05723
YH		 1110 struct ipv6_saddr_score scores[2],
1111 *score = &scores[0], *hiscore = &scores[1];
c346dca1 1112 struct net *net = dev_net(dst_dev);
a9b05723 1113 struct ipv6_saddr_dst dst;
072047e4 1114 struct net_device *dev;
a9b05723 1115 int dst_type;
1da177e4 1116
a9b05723
YH		 1117 dst_type = __ipv6_addr_type(daddr);
1118 dst.addr = daddr;
1119 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1120 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1121 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1122 dst.prefs = prefs;
a9b05723
YH		 1123
1124 hiscore->rule = -1;
1125 hiscore->ifa = NULL;
1da177e4 1126
072047e4 1127 read_lock(&dev_base_lock);
8814c4b5 1128 rcu_read_lock();
1da177e4 1129
6fda7350 1130 for_each_netdev(net, dev) {
072047e4 1131 struct inet6_dev *idev;
072047e4 1132
a9b05723 1133 /* Candidate Source Address (section 4)
072047e4
YH		 1134 * - multicast and link-local destination address,
1135 * the set of candidate source address MUST only
1136 * include addresses assigned to interfaces
1137 * belonging to the same link as the outgoing
1138 * interface.
1139 * (- For site-local destination addresses, the
1140 * set of candidate source addresses MUST only
1141 * include addresses assigned to interfaces
1142 * belonging to the same site as the outgoing
1143 * interface.)
1144 */
a9b05723
YH		 1145 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1146 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1147 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1148 continue;
1da177e4 1149
1da177e4 1150 idev = __in6_dev_get(dev);
072047e4
YH		 1151 if (!idev)
1152 continue;
1153
1154 read_lock_bh(&idev->lock);
a9b05723
YH		 1155 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1156 int i;
072047e4 1157
a9b05723 1158 /*
6b3ae80a
YH		 1159 * - Tentative Address (RFC2462 section 5.4)
1160 * - A tentative address is not considered
1161 * "assigned to an interface" in the traditional
95c385b4 1162 * sense, unless it is also flagged as optimistic.
6b3ae80a 1163 * - Candidate Source Address (section 4)
072047e4
YH		 1164 * - In any case, anycast addresses, multicast
1165 * addresses, and the unspecified address MUST
1166 * NOT be included in a candidate set.
1167 */
a9b05723
YH		 1168 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1169 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1170 continue;
a9b05723
YH		 1171
1172 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1173
1174 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1175 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1176 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1177 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1178 "assigned as unicast address on %s",
1179 dev->name);
1180 continue;
1181 }
1182
a9b05723
YH		 1183 score->rule = -1;
1184 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1185
1186 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1187 int minihiscore, miniscore;
1188
3de23255
BT		 1189 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1190 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1191
1192 if (minihiscore > miniscore) {
1193 if (i == IPV6_SADDR_RULE_SCOPE &&
1194 score->scopedist > 0) {
1195 /*
1196 * special case:
1197 * each remaining entry
1198 * has too small (not enough)
1199 * scope, because ifa entries
1200 * are sorted by their scope
1201 * values.
1202 */
1203 goto try_nextdev;
1204 }
1205 break;
1206 } else if (minihiscore < miniscore) {
1207 struct ipv6_saddr_score *tmp;
1208
1209 if (hiscore->ifa)
1210 in6_ifa_put(hiscore->ifa);
1211
1212 in6_ifa_hold(score->ifa);
1213
1214 tmp = hiscore;
1215 hiscore = score;
1216 score = tmp;
1217
1218 /* restore our iterator */
1219 score->ifa = hiscore->ifa;
1220
1221 break;
1da177e4 1222 }
072047e4 1223 }
1da177e4 1224 }
a9b05723 1225try_nextdev:
072047e4 1226 read_unlock_bh(&idev->lock);
1da177e4 1227 }
8814c4b5 1228 rcu_read_unlock();
1da177e4
LT		 1229 read_unlock(&dev_base_lock);
1230
a9b05723 1231 if (!hiscore->ifa)
072047e4 1232 return -EADDRNOTAVAIL;
1ab1457c 1233
a9b05723
YH		 1234 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1235 in6_ifa_put(hiscore->ifa);
072047e4 1236 return 0;
1da177e4
LT		 1237}
1238
5e5f3f0f 1239EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1240
95c385b4
NH		 1241int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1242 unsigned char banned_flags)
1da177e4
LT		 1243{
1244 struct inet6_dev *idev;
1245 int err = -EADDRNOTAVAIL;
1246
8814c4b5 1247 rcu_read_lock();
1da177e4
LT		 1248 if ((idev = __in6_dev_get(dev)) != NULL) {
1249 struct inet6_ifaddr *ifp;
1250
1251 read_lock_bh(&idev->lock);
1252 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1253 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1254 ipv6_addr_copy(addr, &ifp->addr);
1255 err = 0;
1256 break;
1257 }
1258 }
1259 read_unlock_bh(&idev->lock);
1260 }
8814c4b5 1261 rcu_read_unlock();
1da177e4
LT		 1262 return err;
1263}
1264
1265static int ipv6_count_addresses(struct inet6_dev *idev)
1266{
1267 int cnt = 0;
1268 struct inet6_ifaddr *ifp;
1269
1270 read_lock_bh(&idev->lock);
1271 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1272 cnt++;
1273 read_unlock_bh(&idev->lock);
1274 return cnt;
1275}
1276
bfeade08
DL		 1277int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1278 struct net_device *dev, int strict)
1da177e4
LT		 1279{
1280 struct inet6_ifaddr * ifp;
1281 u8 hash = ipv6_addr_hash(addr);
1282
1283 read_lock_bh(&addrconf_hash_lock);
1284 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1285 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1286 continue;
1da177e4
LT		 1287 if (ipv6_addr_equal(&ifp->addr, addr) &&
1288 !(ifp->flags&IFA_F_TENTATIVE)) {
1289 if (dev == NULL || ifp->idev->dev == dev ||
1290 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1291 break;
1292 }
1293 }
1294 read_unlock_bh(&addrconf_hash_lock);
1295 return ifp != NULL;
1296}
7159039a
YH		 1297EXPORT_SYMBOL(ipv6_chk_addr);
1298
1da177e4 1299static
06bfe655
DL		 1300int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1301 struct net_device *dev)
1da177e4
LT		 1302{
1303 struct inet6_ifaddr * ifp;
1304 u8 hash = ipv6_addr_hash(addr);
1305
1306 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1307 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1308 continue;
1da177e4
LT		 1309 if (ipv6_addr_equal(&ifp->addr, addr)) {
1310 if (dev == NULL || ifp->idev->dev == dev)
1311 break;
1312 }
1313 }
1314 return ifp != NULL;
1315}
1316
52eeeb84
YH		 1317int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1318{
1319 struct inet6_dev *idev;
1320 struct inet6_ifaddr *ifa;
1321 int onlink;
1322
1323 onlink = 0;
1324 rcu_read_lock();
1325 idev = __in6_dev_get(dev);
1326 if (idev) {
1327 read_lock_bh(&idev->lock);
1328 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1329 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1330 ifa->prefix_len);
1331 if (onlink)
1332 break;
1333 }
1334 read_unlock_bh(&idev->lock);
1335 }
1336 rcu_read_unlock();
1337 return onlink;
1338}
1339
1340EXPORT_SYMBOL(ipv6_chk_prefix);
1341
9acd9f3a 1342struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1343 struct net_device *dev, int strict)
1da177e4
LT		 1344{
1345 struct inet6_ifaddr * ifp;
1346 u8 hash = ipv6_addr_hash(addr);
1347
1348 read_lock_bh(&addrconf_hash_lock);
1349 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1350 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1351 continue;
1da177e4
LT		 1352 if (ipv6_addr_equal(&ifp->addr, addr)) {
1353 if (dev == NULL || ifp->idev->dev == dev ||
1354 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1355 in6_ifa_hold(ifp);
1356 break;
1357 }
1358 }
1359 }
1360 read_unlock_bh(&addrconf_hash_lock);
1361
1362 return ifp;
1363}
1364
1365int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1366{
1367 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1368 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1369 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1370 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1371 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1372 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1373 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1374 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1375
1376 if (!sk2_rcv_saddr && !sk_ipv6only)
1377 return 1;
1378
1379 if (addr_type2 == IPV6_ADDR_ANY &&
1380 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1381 return 1;
1382
1383 if (addr_type == IPV6_ADDR_ANY &&
1384 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1385 return 1;
1386
1387 if (sk2_rcv_saddr6 &&
1388 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1389 return 1;
1390
1391 if (addr_type == IPV6_ADDR_MAPPED &&
1392 !sk2_ipv6only &&
1393 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1394 return 1;
1395
1396 return 0;
1397}
1398
1399/* Gets referenced address, destroys ifaddr */
1400
9f5336e2 1401static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1402{
1da177e4
LT		 1403 if (ifp->flags&IFA_F_PERMANENT) {
1404 spin_lock_bh(&ifp->lock);
1405 addrconf_del_timer(ifp);
1406 ifp->flags |= IFA_F_TENTATIVE;
1407 spin_unlock_bh(&ifp->lock);
1408 in6_ifa_put(ifp);
1409#ifdef CONFIG_IPV6_PRIVACY
1410 } else if (ifp->flags&IFA_F_TEMPORARY) {
1411 struct inet6_ifaddr *ifpub;
1412 spin_lock_bh(&ifp->lock);
1413 ifpub = ifp->ifpub;
1414 if (ifpub) {
1415 in6_ifa_hold(ifpub);
1416 spin_unlock_bh(&ifp->lock);
1417 ipv6_create_tempaddr(ifpub, ifp);
1418 in6_ifa_put(ifpub);
1419 } else {
1420 spin_unlock_bh(&ifp->lock);
1421 }
1422 ipv6_del_addr(ifp);
1423#endif
1424 } else
1425 ipv6_del_addr(ifp);
1426}
1427
3c21edbd
YH		 1428void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1429{
1b34be74
YH		 1430 struct inet6_dev *idev = ifp->idev;
1431 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1432 struct in6_addr addr;
1433
1434 addr.s6_addr32[0] = htonl(0xfe800000);
1435 addr.s6_addr32[1] = 0;
1436
1437 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1438 ipv6_addr_equal(&ifp->addr, &addr)) {
1439 /* DAD failed for link-local based on MAC address */
1440 idev->cnf.disable_ipv6 = 1;
1441 }
1442 }
1443
3c21edbd
YH		 1444 if (net_ratelimit())
1445 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1446 addrconf_dad_stop(ifp);
1447}
1da177e4
LT		 1448
1449/* Join to solicited addr multicast group. */
1450
1451void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1452{
1453 struct in6_addr maddr;
1454
1455 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1456 return;
1457
1458 addrconf_addr_solict_mult(addr, &maddr);
1459 ipv6_dev_mc_inc(dev, &maddr);
1460}
1461
1462void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1463{
1464 struct in6_addr maddr;
1465
1466 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1467 return;
1468
1469 addrconf_addr_solict_mult(addr, &maddr);
1470 __ipv6_dev_mc_dec(idev, &maddr);
1471}
1472
20380731 1473static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1474{
1475 struct in6_addr addr;
1476 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1477 if (ipv6_addr_any(&addr))
1478 return;
1479 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1480}
1481
20380731 1482static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1483{
1484 struct in6_addr addr;
1485 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1486 if (ipv6_addr_any(&addr))
1487 return;
1488 __ipv6_dev_ac_dec(ifp->idev, &addr);
1489}
1490
073a8e0e
YH		 1491static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1492{
1493 if (dev->addr_len != ETH_ALEN)
1494 return -1;
1495 memcpy(eui, dev->dev_addr, 3);
1496 memcpy(eui + 5, dev->dev_addr + 3, 3);
1497
1498 /*
1499 * The zSeries OSA network cards can be shared among various
1500 * OS instances, but the OSA cards have only one MAC address.
1501 * This leads to duplicate address conflicts in conjunction
1502 * with IPv6 if more than one instance uses the same card.
1503 *
1504 * The driver for these cards can deliver a unique 16-bit
1505 * identifier for each instance sharing the same card. It is
1506 * placed instead of 0xFFFE in the interface identifier. The
1507 * "u" bit of the interface identifier is not inverted in this
1508 * case. Hence the resulting interface identifier has local
1509 * scope according to RFC2373.
1510 */
1511 if (dev->dev_id) {
1512 eui[3] = (dev->dev_id >> 8) & 0xFF;
1513 eui[4] = dev->dev_id & 0xFF;
1514 } else {
1515 eui[3] = 0xFF;
1516 eui[4] = 0xFE;
1517 eui[0] ^= 2;
1518 }
1519 return 0;
1520}
1521
1522static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1523{
1524 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1525 if (dev->addr_len != ARCNET_ALEN)
1526 return -1;
1527 memset(eui, 0, 7);
1528 eui[7] = *(u8*)dev->dev_addr;
1529 return 0;
1530}
1531
1532static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1533{
1534 if (dev->addr_len != INFINIBAND_ALEN)
1535 return -1;
1536 memcpy(eui, dev->dev_addr + 12, 8);
1537 eui[0] |= 2;
1538 return 0;
1539}
1540
dfd982ba
YH		 1541int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1542{
1543 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1544 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1545 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1546 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1547 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1548 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1549 eui[1] = 0;
1550 eui[2] = 0x5E;
1551 eui[3] = 0xFE;
1552 memcpy(eui + 4, &addr, 4);
1553 return 0;
1554}
1555EXPORT_SYMBOL(__ipv6_isatap_ifid);
1556
1557static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1558{
1559 if (dev->priv_flags & IFF_ISATAP)
1560 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1561 return -1;
1562}
1563
1da177e4
LT		 1564static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1565{
1566 switch (dev->type) {
1567 case ARPHRD_ETHER:
1568 case ARPHRD_FDDI:
1569 case ARPHRD_IEEE802_TR:
073a8e0e 1570 return addrconf_ifid_eui48(eui, dev);
1da177e4 1571 case ARPHRD_ARCNET:
073a8e0e 1572 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1573 case ARPHRD_INFINIBAND:
073a8e0e 1574 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1575 case ARPHRD_SIT:
dfd982ba 1576 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1577 }
1578 return -1;
1579}
1580
1581static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1582{
1583 int err = -1;
1584 struct inet6_ifaddr *ifp;
1585
1586 read_lock_bh(&idev->lock);
1587 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1588 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1589 memcpy(eui, ifp->addr.s6_addr+8, 8);
1590 err = 0;
1591 break;
1592 }
1593 }
1594 read_unlock_bh(&idev->lock);
1595 return err;
1596}
1597
1598#ifdef CONFIG_IPV6_PRIVACY
1599/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1600static int __ipv6_regen_rndid(struct inet6_dev *idev)
1601{
1da177e4 1602regen:
955189ef 1603 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1604 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1605
1606 /*
1607 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1608 * check if generated address is not inappropriate
1609 *
1610 * - Reserved subnet anycast (RFC 2526)
1611 * 11111101 11....11 1xxxxxxx
c7dc89c0 1612 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1613 * 00-00-5E-FE-xx-xx-xx-xx
1614 * - value 0
1615 * - XXX: already assigned to an address on the device
1616 */
1ab1457c 1617 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1618 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1619 (idev->rndid[7]&0x80))
1620 goto regen;
1621 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1622 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1623 goto regen;
1624 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1625 goto regen;
1626 }
1627
1628 return 0;
1629}
1630
1631static void ipv6_regen_rndid(unsigned long data)
1632{
1633 struct inet6_dev *idev = (struct inet6_dev *) data;
1634 unsigned long expires;
1635
8814c4b5 1636 rcu_read_lock_bh();
1da177e4
LT		 1637 write_lock_bh(&idev->lock);
1638
1639 if (idev->dead)
1640 goto out;
1641
1642 if (__ipv6_regen_rndid(idev) < 0)
1643 goto out;
1ab1457c 1644
1da177e4 1645 expires = jiffies +
1ab1457c 1646 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1647 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1648 if (time_before(expires, jiffies)) {
1649 printk(KERN_WARNING
1650 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1651 idev->dev->name);
1652 goto out;
1653 }
1654
1655 if (!mod_timer(&idev->regen_timer, expires))
1656 in6_dev_hold(idev);
1657
1658out:
1659 write_unlock_bh(&idev->lock);
8814c4b5 1660 rcu_read_unlock_bh();
1da177e4
LT		 1661 in6_dev_put(idev);
1662}
1663
1664static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1665 int ret = 0;
1666
1667 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1668 ret = __ipv6_regen_rndid(idev);
1669 return ret;
1670}
1671#endif
1672
1673/*
1674 * Add prefix route.
1675 */
1676
1677static void
1678addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1679 unsigned long expires, u32 flags)
1da177e4 1680{
86872cb5
TG		 1681 struct fib6_config cfg = {
1682 .fc_table = RT6_TABLE_PREFIX,
1683 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1684 .fc_ifindex = dev->ifindex,
1685 .fc_expires = expires,
1686 .fc_dst_len = plen,
1687 .fc_flags = RTF_UP | flags,
c346dca1 1688 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1689 };
1da177e4 1690
86872cb5 1691 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1692
1693 /* Prevent useless cloning on PtP SIT.
1694 This thing is done here expecting that the whole
1695 class of non-broadcast devices need not cloning.
1696 */
0be669bb 1697#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1698 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1699 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1700#endif
1da177e4 1701
86872cb5 1702 ip6_route_add(&cfg);
1da177e4
LT		 1703}
1704
1705/* Create "default" multicast route to the interface */
1706
1707static void addrconf_add_mroute(struct net_device *dev)
1708{
86872cb5
TG		 1709 struct fib6_config cfg = {
1710 .fc_table = RT6_TABLE_LOCAL,
1711 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1712 .fc_ifindex = dev->ifindex,
1713 .fc_dst_len = 8,
1714 .fc_flags = RTF_UP,
c346dca1 1715 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1716 };
1717
1718 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1719
1720 ip6_route_add(&cfg);
1da177e4
LT		 1721}
1722
0be669bb 1723#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1724static void sit_route_add(struct net_device *dev)
1725{
86872cb5
TG		 1726 struct fib6_config cfg = {
1727 .fc_table = RT6_TABLE_MAIN,
1728 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1729 .fc_ifindex = dev->ifindex,
1730 .fc_dst_len = 96,
1731 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1732 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1733 };
1da177e4
LT		 1734
1735 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1736 ip6_route_add(&cfg);
1da177e4 1737}
0be669bb 1738#endif
1da177e4
LT		 1739
1740static void addrconf_add_lroute(struct net_device *dev)
1741{
1742 struct in6_addr addr;
1743
1744 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1745 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1746}
1747
1748static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1749{
1750 struct inet6_dev *idev;
1751
1752 ASSERT_RTNL();
1753
1754 if ((idev = ipv6_find_idev(dev)) == NULL)
1755 return NULL;
1756
1757 /* Add default multicast route */
1758 addrconf_add_mroute(dev);
1759
1760 /* Add link local route */
1761 addrconf_add_lroute(dev);
1762 return idev;
1763}
1764
1765void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1766{
1767 struct prefix_info *pinfo;
1768 __u32 valid_lft;
1769 __u32 prefered_lft;
1770 int addr_type;
1da177e4
LT		 1771 struct inet6_dev *in6_dev;
1772
1773 pinfo = (struct prefix_info *) opt;
1ab1457c 1774
1da177e4
LT		 1775 if (len < sizeof(struct prefix_info)) {
1776 ADBG(("addrconf: prefix option too short\n"));
1777 return;
1778 }
1ab1457c 1779
1da177e4
LT		 1780 /*
1781 * Validation checks ([ADDRCONF], page 19)
1782 */
1783
1784 addr_type = ipv6_addr_type(&pinfo->prefix);
1785
1786 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1787 return;
1788
1789 valid_lft = ntohl(pinfo->valid);
1790 prefered_lft = ntohl(pinfo->prefered);
1791
1792 if (prefered_lft > valid_lft) {
1793 if (net_ratelimit())
1794 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1795 return;
1796 }
1797
1798 in6_dev = in6_dev_get(dev);
1799
1800 if (in6_dev == NULL) {
1801 if (net_ratelimit())
1802 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1803 return;
1804 }
1805
1806 /*
1807 * Two things going on here:
1808 * 1) Add routes for on-link prefixes
1809 * 2) Configure prefixes with the auto flag set
1810 */
1811
4bed72e4
YH		 1812 if (pinfo->onlink) {
1813 struct rt6_info *rt;
1814 unsigned long rt_expires;
1815
6f704992
YH		 1816 /* Avoid arithmetic overflow. Really, we could
1817 * save rt_expires in seconds, likely valid_lft,
1818 * but it would require division in fib gc, that it
1819 * not good.
1820 */
4bed72e4
YH		 1821 if (HZ > USER_HZ)
1822 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1823 else
1824 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1825
4bed72e4
YH		 1826 if (addrconf_finite_timeout(rt_expires))
1827 rt_expires *= HZ;
1da177e4 1828
c346dca1 1829 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
6fda7350 1830 dev->ifindex, 1);
1da177e4 1831
2b5ead46 1832 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1833 /* Autoconf prefix route */
1834 if (valid_lft == 0) {
1835 ip6_del_rt(rt);
1836 rt = NULL;
4bed72e4 1837 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1838 /* not infinity */
1839 rt->rt6i_expires = jiffies + rt_expires;
1840 rt->rt6i_flags |= RTF_EXPIRES;
1841 } else {
1842 rt->rt6i_flags &= ~RTF_EXPIRES;
1843 rt->rt6i_expires = 0;
1da177e4
LT		 1844 }
1845 } else if (valid_lft) {
6f704992 1846 clock_t expires = 0;
4bed72e4
YH		 1847 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1848 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1849 /* not infinity */
1850 flags |= RTF_EXPIRES;
1851 expires = jiffies_to_clock_t(rt_expires);
1852 }
1da177e4 1853 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1854 dev, expires, flags);
1da177e4
LT		 1855 }
1856 if (rt)
1857 dst_release(&rt->u.dst);
1858 }
1859
1860 /* Try to figure out our local address for this prefix */
1861
1862 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1863 struct inet6_ifaddr * ifp;
1864 struct in6_addr addr;
1865 int create = 0, update_lft = 0;
53b7997f 1866 struct net *net = dev_net(dev);
1da177e4
LT		 1867
1868 if (pinfo->prefix_len == 64) {
1869 memcpy(&addr, &pinfo->prefix, 8);
1870 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1871 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1872 in6_dev_put(in6_dev);
1873 return;
1874 }
1875 goto ok;
1876 }
1877 if (net_ratelimit())
1878 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1879 pinfo->prefix_len);
1880 in6_dev_put(in6_dev);
1881 return;
1882
1883ok:
1884
53b7997f 1885 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1886
1887 if (ifp == NULL && valid_lft) {
1888 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1889 u32 addr_flags = 0;
1890
1891#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1892 if (in6_dev->cnf.optimistic_dad &&
53b7997f 1893 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 1894 addr_flags = IFA_F_OPTIMISTIC;
1895#endif
1da177e4
LT		 1896
1897 /* Do not allow to create too much of autoconfigured
1898 * addresses; this would be too easy way to crash kernel.
1899 */
1900 if (!max_addresses ||
1901 ipv6_count_addresses(in6_dev) < max_addresses)
1902 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1903 addr_type&IPV6_ADDR_SCOPE_MASK,
1904 addr_flags);
1da177e4
LT		 1905
1906 if (!ifp || IS_ERR(ifp)) {
1907 in6_dev_put(in6_dev);
1908 return;
1909 }
1910
1911 update_lft = create = 1;
1912 ifp->cstamp = jiffies;
1913 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1914 }
1915
1916 if (ifp) {
1917 int flags;
1918 unsigned long now;
1919#ifdef CONFIG_IPV6_PRIVACY
1920 struct inet6_ifaddr *ift;
1921#endif
1922 u32 stored_lft;
1923
1924 /* update lifetime (RFC2462 5.5.3 e) */
1925 spin_lock(&ifp->lock);
1926 now = jiffies;
1927 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1928 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1929 else
1930 stored_lft = 0;
1931 if (!update_lft && stored_lft) {
1932 if (valid_lft > MIN_VALID_LIFETIME ||
1933 valid_lft > stored_lft)
1934 update_lft = 1;
1935 else if (stored_lft <= MIN_VALID_LIFETIME) {
1936 /* valid_lft <= stored_lft is always true */
1937 /* XXX: IPsec */
1938 update_lft = 0;
1939 } else {
1940 valid_lft = MIN_VALID_LIFETIME;
1941 if (valid_lft < prefered_lft)
1942 prefered_lft = valid_lft;
1943 update_lft = 1;
1944 }
1945 }
1946
1947 if (update_lft) {
1948 ifp->valid_lft = valid_lft;
1949 ifp->prefered_lft = prefered_lft;
1950 ifp->tstamp = now;
1951 flags = ifp->flags;
1952 ifp->flags &= ~IFA_F_DEPRECATED;
1953 spin_unlock(&ifp->lock);
1954
1955 if (!(flags&IFA_F_TENTATIVE))
1956 ipv6_ifa_notify(0, ifp);
1957 } else
1958 spin_unlock(&ifp->lock);
1959
1960#ifdef CONFIG_IPV6_PRIVACY
1961 read_lock_bh(&in6_dev->lock);
1962 /* update all temporary addresses in the list */
1963 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1964 /*
1965 * When adjusting the lifetimes of an existing
1966 * temporary address, only lower the lifetimes.
1967 * Implementations must not increase the
1968 * lifetimes of an existing temporary address
1969 * when processing a Prefix Information Option.
1970 */
c6fbfac2
BB		 1971 if (ifp != ift->ifpub)
1972 continue;
1973
1da177e4
LT		 1974 spin_lock(&ift->lock);
1975 flags = ift->flags;
1976 if (ift->valid_lft > valid_lft &&
1977 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1978 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1979 if (ift->prefered_lft > prefered_lft &&
1980 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1981 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1982 spin_unlock(&ift->lock);
1983 if (!(flags&IFA_F_TENTATIVE))
1984 ipv6_ifa_notify(0, ift);
1985 }
1986
1987 if (create && in6_dev->cnf.use_tempaddr > 0) {
1988 /*
1989 * When a new public address is created as described in [ADDRCONF],
1990 * also create a new temporary address.
1991 */
1ab1457c 1992 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1993 ipv6_create_tempaddr(ifp, NULL);
1994 } else {
1995 read_unlock_bh(&in6_dev->lock);
1996 }
1997#endif
1998 in6_ifa_put(ifp);
1999 addrconf_verify(0);
2000 }
2001 }
2002 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2003 in6_dev_put(in6_dev);
2004}
2005
2006/*
2007 * Set destination address.
2008 * Special case for SIT interfaces where we create a new "virtual"
2009 * device.
2010 */
af284937 2011int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2012{
2013 struct in6_ifreq ireq;
2014 struct net_device *dev;
2015 int err = -EINVAL;
2016
2017 rtnl_lock();
2018
2019 err = -EFAULT;
2020 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2021 goto err_exit;
2022
af284937 2023 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2024
2025 err = -ENODEV;
2026 if (dev == NULL)
2027 goto err_exit;
2028
0be669bb 2029#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2030 if (dev->type == ARPHRD_SIT) {
2031 struct ifreq ifr;
2032 mm_segment_t oldfs;
2033 struct ip_tunnel_parm p;
2034
2035 err = -EADDRNOTAVAIL;
2036 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2037 goto err_exit;
2038
2039 memset(&p, 0, sizeof(p));
2040 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2041 p.iph.saddr = 0;
2042 p.iph.version = 4;
2043 p.iph.ihl = 5;
2044 p.iph.protocol = IPPROTO_IPV6;
2045 p.iph.ttl = 64;
d20b3109 2046 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4
LT		 2047
2048 oldfs = get_fs(); set_fs(KERNEL_DS);
2049 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2050 set_fs(oldfs);
2051
2052 if (err == 0) {
2053 err = -ENOBUFS;
af284937
DL		 2054 dev = __dev_get_by_name(net, p.name);
2055 if (!dev)
1da177e4
LT		 2056 goto err_exit;
2057 err = dev_open(dev);
2058 }
2059 }
0be669bb 2060#endif
1da177e4
LT		 2061
2062err_exit:
2063 rtnl_unlock();
2064 return err;
2065}
2066
2067/*
2068 * Manual configuration of address on an interface
2069 */
af284937 2070static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2071 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2072 __u32 valid_lft)
1da177e4
LT		 2073{
2074 struct inet6_ifaddr *ifp;
2075 struct inet6_dev *idev;
2076 struct net_device *dev;
2077 int scope;
6f704992
YH		 2078 u32 flags;
2079 clock_t expires;
4bed72e4 2080 unsigned long timeout;
1da177e4
LT		 2081
2082 ASSERT_RTNL();
1ab1457c 2083
24ef0da7
TG		 2084 if (plen > 128)
2085 return -EINVAL;
2086
0778769d
NT		 2087 /* check the lifetime */
2088 if (!valid_lft || prefered_lft > valid_lft)
2089 return -EINVAL;
2090
af284937
DL		 2091 dev = __dev_get_by_index(net, ifindex);
2092 if (!dev)
1da177e4 2093 return -ENODEV;
1ab1457c 2094
1da177e4
LT		 2095 if ((idev = addrconf_add_dev(dev)) == NULL)
2096 return -ENOBUFS;
2097
2098 scope = ipv6_addr_scope(pfx);
2099
4bed72e4
YH		 2100 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2101 if (addrconf_finite_timeout(timeout)) {
2102 expires = jiffies_to_clock_t(timeout * HZ);
2103 valid_lft = timeout;
6f704992 2104 flags = RTF_EXPIRES;
4bed72e4
YH		 2105 } else {
2106 expires = 0;
2107 flags = 0;
2108 ifa_flags |= IFA_F_PERMANENT;
6f704992 2109 }
0778769d 2110
4bed72e4
YH		 2111 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2112 if (addrconf_finite_timeout(timeout)) {
2113 if (timeout == 0)
2114 ifa_flags |= IFA_F_DEPRECATED;
2115 prefered_lft = timeout;
2116 }
0778769d
NT		 2117
2118 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2119
1da177e4 2120 if (!IS_ERR(ifp)) {
06aebfb7 2121 spin_lock_bh(&ifp->lock);
0778769d
NT		 2122 ifp->valid_lft = valid_lft;
2123 ifp->prefered_lft = prefered_lft;
2124 ifp->tstamp = jiffies;
06aebfb7 2125 spin_unlock_bh(&ifp->lock);
0778769d 2126
46d48046 2127 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2128 expires, flags);
95c385b4
NH		 2129 /*
2130 * Note that section 3.1 of RFC 4429 indicates
2131 * that the Optimistic flag should not be set for
2132 * manually configured addresses
2133 */
1da177e4
LT		 2134 addrconf_dad_start(ifp, 0);
2135 in6_ifa_put(ifp);
0778769d 2136 addrconf_verify(0);
1da177e4
LT		 2137 return 0;
2138 }
2139
2140 return PTR_ERR(ifp);
2141}
2142
af284937 2143static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2144 unsigned int plen)
1da177e4
LT		 2145{
2146 struct inet6_ifaddr *ifp;
2147 struct inet6_dev *idev;
2148 struct net_device *dev;
1ab1457c 2149
24ef0da7
TG		 2150 if (plen > 128)
2151 return -EINVAL;
2152
af284937
DL		 2153 dev = __dev_get_by_index(net, ifindex);
2154 if (!dev)
1da177e4
LT		 2155 return -ENODEV;
2156
2157 if ((idev = __in6_dev_get(dev)) == NULL)
2158 return -ENXIO;
2159
2160 read_lock_bh(&idev->lock);
2161 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2162 if (ifp->prefix_len == plen &&
2163 ipv6_addr_equal(pfx, &ifp->addr)) {
2164 in6_ifa_hold(ifp);
2165 read_unlock_bh(&idev->lock);
1ab1457c 2166
1da177e4
LT		 2167 ipv6_del_addr(ifp);
2168
2169 /* If the last address is deleted administratively,
2170 disable IPv6 on this interface.
2171 */
2172 if (idev->addr_list == NULL)
2173 addrconf_ifdown(idev->dev, 1);
2174 return 0;
2175 }
2176 }
2177 read_unlock_bh(&idev->lock);
2178 return -EADDRNOTAVAIL;
2179}
2180
2181
af284937 2182int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2183{
2184 struct in6_ifreq ireq;
2185 int err;
1ab1457c 2186
1da177e4
LT		 2187 if (!capable(CAP_NET_ADMIN))
2188 return -EPERM;
1ab1457c 2189
1da177e4
LT		 2190 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2191 return -EFAULT;
2192
2193 rtnl_lock();
af284937
DL		 2194 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2195 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2196 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2197 rtnl_unlock();
2198 return err;
2199}
2200
af284937 2201int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2202{
2203 struct in6_ifreq ireq;
2204 int err;
1ab1457c 2205
1da177e4
LT		 2206 if (!capable(CAP_NET_ADMIN))
2207 return -EPERM;
2208
2209 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2210 return -EFAULT;
2211
2212 rtnl_lock();
af284937
DL		 2213 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2214 ireq.ifr6_prefixlen);
1da177e4
LT		 2215 rtnl_unlock();
2216 return err;
2217}
2218
0be669bb 2219#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2220static void sit_add_v4_addrs(struct inet6_dev *idev)
2221{
2222 struct inet6_ifaddr * ifp;
2223 struct in6_addr addr;
2224 struct net_device *dev;
c346dca1 2225 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2226 int scope;
2227
2228 ASSERT_RTNL();
2229
2230 memset(&addr, 0, sizeof(struct in6_addr));
2231 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2232
2233 if (idev->dev->flags&IFF_POINTOPOINT) {
2234 addr.s6_addr32[0] = htonl(0xfe800000);
2235 scope = IFA_LINK;
2236 } else {
2237 scope = IPV6_ADDR_COMPATv4;
2238 }
2239
2240 if (addr.s6_addr32[3]) {
2241 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2242 if (!IS_ERR(ifp)) {
2243 spin_lock_bh(&ifp->lock);
2244 ifp->flags &= ~IFA_F_TENTATIVE;
2245 spin_unlock_bh(&ifp->lock);
2246 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2247 in6_ifa_put(ifp);
2248 }
2249 return;
2250 }
2251
6fda7350 2252 for_each_netdev(net, dev) {
e5ed6399 2253 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2254 if (in_dev && (dev->flags & IFF_UP)) {
2255 struct in_ifaddr * ifa;
2256
2257 int flag = scope;
2258
2259 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2260 int plen;
2261
2262 addr.s6_addr32[3] = ifa->ifa_local;
2263
2264 if (ifa->ifa_scope == RT_SCOPE_LINK)
2265 continue;
2266 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2267 if (idev->dev->flags&IFF_POINTOPOINT)
2268 continue;
2269 flag |= IFA_HOST;
2270 }
2271 if (idev->dev->flags&IFF_POINTOPOINT)
2272 plen = 64;
2273 else
2274 plen = 96;
2275
2276 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2277 IFA_F_PERMANENT);
2278 if (!IS_ERR(ifp)) {
2279 spin_lock_bh(&ifp->lock);
2280 ifp->flags &= ~IFA_F_TENTATIVE;
2281 spin_unlock_bh(&ifp->lock);
2282 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2283 in6_ifa_put(ifp);
2284 }
2285 }
2286 }
1ab1457c 2287 }
1da177e4 2288}
0be669bb 2289#endif
1da177e4
LT		 2290
2291static void init_loopback(struct net_device *dev)
2292{
2293 struct inet6_dev *idev;
2294 struct inet6_ifaddr * ifp;
2295
2296 /* ::1 */
2297
2298 ASSERT_RTNL();
2299
2300 if ((idev = ipv6_find_idev(dev)) == NULL) {
2301 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2302 return;
2303 }
2304
2305 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2306 if (!IS_ERR(ifp)) {
2307 spin_lock_bh(&ifp->lock);
2308 ifp->flags &= ~IFA_F_TENTATIVE;
2309 spin_unlock_bh(&ifp->lock);
2310 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2311 in6_ifa_put(ifp);
2312 }
2313}
2314
2315static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2316{
2317 struct inet6_ifaddr * ifp;
53b7997f 2318 struct net *net = dev_net(idev->dev);
95c385b4
NH		 2319 u32 addr_flags = IFA_F_PERMANENT;
2320
2321#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2322 if (idev->cnf.optimistic_dad &&
53b7997f 2323 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 2324 addr_flags |= IFA_F_OPTIMISTIC;
2325#endif
1da177e4 2326
95c385b4
NH		 2327
2328 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2329 if (!IS_ERR(ifp)) {
46d48046 2330 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2331 addrconf_dad_start(ifp, 0);
2332 in6_ifa_put(ifp);
2333 }
2334}
2335
2336static void addrconf_dev_config(struct net_device *dev)
2337{
2338 struct in6_addr addr;
2339 struct inet6_dev * idev;
2340
2341 ASSERT_RTNL();
2342
74235a25
HX		 2343 if ((dev->type != ARPHRD_ETHER) &&
2344 (dev->type != ARPHRD_FDDI) &&
2345 (dev->type != ARPHRD_IEEE802_TR) &&
2346 (dev->type != ARPHRD_ARCNET) &&
2347 (dev->type != ARPHRD_INFINIBAND)) {
2348 /* Alas, we support only Ethernet autoconfiguration. */
2349 return;
2350 }
2351
1da177e4
LT		 2352 idev = addrconf_add_dev(dev);
2353 if (idev == NULL)
2354 return;
2355
2356 memset(&addr, 0, sizeof(struct in6_addr));
2357 addr.s6_addr32[0] = htonl(0xFE800000);
2358
2359 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2360 addrconf_add_linklocal(idev, &addr);
2361}
2362
0be669bb 2363#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2364static void addrconf_sit_config(struct net_device *dev)
2365{
2366 struct inet6_dev *idev;
2367
2368 ASSERT_RTNL();
2369
1ab1457c
YH		 2370 /*
2371 * Configure the tunnel with one of our IPv4
2372 * addresses... we should configure all of
1da177e4
LT		 2373 * our v4 addrs in the tunnel
2374 */
2375
2376 if ((idev = ipv6_find_idev(dev)) == NULL) {
2377 printk(KERN_DEBUG "init sit: add_dev failed\n");
2378 return;
2379 }
2380
c7dc89c0
FT		 2381 if (dev->priv_flags & IFF_ISATAP) {
2382 struct in6_addr addr;
2383
2384 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2385 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2386 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2387 addrconf_add_linklocal(idev, &addr);
2388 return;
2389 }
2390
1da177e4
LT		 2391 sit_add_v4_addrs(idev);
2392
2393 if (dev->flags&IFF_POINTOPOINT) {
2394 addrconf_add_mroute(dev);
2395 addrconf_add_lroute(dev);
2396 } else
2397 sit_route_add(dev);
2398}
0be669bb 2399#endif
1da177e4
LT		 2400
2401static inline int
2402ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2403{
2404 struct in6_addr lladdr;
2405
95c385b4 2406 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2407 addrconf_add_linklocal(idev, &lladdr);
2408 return 0;
2409 }
2410 return -1;
2411}
2412
2413static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2414{
2415 struct net_device *link_dev;
c346dca1 2416 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2417
2418 /* first try to inherit the link-local address from the link device */
2419 if (idev->dev->iflink &&
6fda7350 2420 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2421 if (!ipv6_inherit_linklocal(idev, link_dev))
2422 return;
2423 }
2424 /* then try to inherit it from any device */
6fda7350 2425 for_each_netdev(net, link_dev) {
1da177e4
LT		 2426 if (!ipv6_inherit_linklocal(idev, link_dev))
2427 return;
2428 }
2429 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2430}
2431
2432/*
2433 * Autoconfigure tunnel with a link-local address so routing protocols,
2434 * DHCPv6, MLD etc. can be run over the virtual link
2435 */
2436
2437static void addrconf_ip6_tnl_config(struct net_device *dev)
2438{
2439 struct inet6_dev *idev;
2440
2441 ASSERT_RTNL();
2442
2443 if ((idev = addrconf_add_dev(dev)) == NULL) {
2444 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2445 return;
2446 }
2447 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2448}
2449
1ab1457c 2450static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2451 void * data)
2452{
2453 struct net_device *dev = (struct net_device *) data;
74235a25 2454 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2455 int run_pending = 0;
b217d616 2456 int err;
1da177e4
LT		 2457
2458 switch(event) {
45ba9dd2 2459 case NETDEV_REGISTER:
74235a25 2460 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2461 idev = ipv6_add_dev(dev);
2462 if (!idev)
b217d616 2463 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2464 }
2465 break;
1da177e4 2466 case NETDEV_UP:
3c21edbd 2467 case NETDEV_CHANGE:
c2edacf8
JV		 2468 if (dev->flags & IFF_SLAVE)
2469 break;
2470
3c21edbd 2471 if (event == NETDEV_UP) {
f24e3d65 2472 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2473 /* device is not ready yet. */
2474 printk(KERN_INFO
2475 "ADDRCONF(NETDEV_UP): %s: "
2476 "link is not ready\n",
2477 dev->name);
2478 break;
2479 }
99081049 2480
d31c7b8f
EP		 2481 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2482 idev = ipv6_add_dev(dev);
2483
99081049
KS		 2484 if (idev)
2485 idev->if_flags |= IF_READY;
3c21edbd 2486 } else {
f24e3d65 2487 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2488 /* device is still not ready. */
2489 break;
2490 }
2491
2492 if (idev) {
2493 if (idev->if_flags & IF_READY) {
2494 /* device is already configured. */
2495 break;
2496 }
2497 idev->if_flags |= IF_READY;
2498 }
2499
2500 printk(KERN_INFO
2501 "ADDRCONF(NETDEV_CHANGE): %s: "
2502 "link becomes ready\n",
2503 dev->name);
2504
c5e33bdd 2505 run_pending = 1;
3c21edbd
YH		 2506 }
2507
1da177e4 2508 switch(dev->type) {
0be669bb 2509#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2510 case ARPHRD_SIT:
2511 addrconf_sit_config(dev);
2512 break;
0be669bb 2513#endif
1da177e4
LT		 2514 case ARPHRD_TUNNEL6:
2515 addrconf_ip6_tnl_config(dev);
2516 break;
2517 case ARPHRD_LOOPBACK:
2518 init_loopback(dev);
2519 break;
2520
2521 default:
2522 addrconf_dev_config(dev);
2523 break;
3ff50b79 2524 }
1da177e4 2525 if (idev) {
c5e33bdd
YH		 2526 if (run_pending)
2527 addrconf_dad_run(idev);
2528
1da177e4
LT		 2529 /* If the MTU changed during the interface down, when the
2530 interface up, the changed MTU must be reflected in the
2531 idev as well as routers.
2532 */
2533 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2534 rt6_mtu_change(dev, dev->mtu);
2535 idev->cnf.mtu6 = dev->mtu;
2536 }
2537 idev->tstamp = jiffies;
2538 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2539 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2540 stop IPv6 on this interface.
2541 */
2542 if (dev->mtu < IPV6_MIN_MTU)
2543 addrconf_ifdown(dev, event != NETDEV_DOWN);
2544 }
2545 break;
2546
2547 case NETDEV_CHANGEMTU:
d31c7b8f 2548 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2549 rt6_mtu_change(dev, dev->mtu);
2550 idev->cnf.mtu6 = dev->mtu;
2551 break;
2552 }
2553
d31c7b8f
EP		 2554 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2555 idev = ipv6_add_dev(dev);
2556 if (idev)
2557 break;
2558 }
2559
1da177e4
LT		 2560 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2561
2562 case NETDEV_DOWN:
2563 case NETDEV_UNREGISTER:
2564 /*
2565 * Remove all addresses from this interface.
2566 */
2567 addrconf_ifdown(dev, event != NETDEV_DOWN);
2568 break;
3c21edbd 2569
1da177e4 2570 case NETDEV_CHANGENAME:
1da177e4 2571 if (idev) {
5632c515 2572 snmp6_unregister_dev(idev);
408c4768 2573 addrconf_sysctl_unregister(idev);
f52295a9 2574 addrconf_sysctl_register(idev);
b217d616
HX		 2575 err = snmp6_register_dev(idev);
2576 if (err)
2577 return notifier_from_errno(err);
5632c515 2578 }
1da177e4 2579 break;
3ff50b79 2580 }
1da177e4
LT		 2581
2582 return NOTIFY_OK;
2583}
2584
2585/*
2586 * addrconf module should be notified of a device going up
2587 */
2588static struct notifier_block ipv6_dev_notf = {
2589 .notifier_call = addrconf_notify,
2590 .priority = 0
2591};
2592
2593static int addrconf_ifdown(struct net_device *dev, int how)
2594{
2595 struct inet6_dev *idev;
2596 struct inet6_ifaddr *ifa, **bifa;
c346dca1 2597 struct net *net = dev_net(dev);
1da177e4
LT		 2598 int i;
2599
2600 ASSERT_RTNL();
2601
eb867579 2602 if ((dev->flags & IFF_LOOPBACK) && how == 1)
1da177e4
LT		 2603 how = 0;
2604
f3db4851 2605 rt6_ifdown(net, dev);
1da177e4
LT		 2606 neigh_ifdown(&nd_tbl, dev);
2607
2608 idev = __in6_dev_get(dev);
2609 if (idev == NULL)
2610 return -ENODEV;
2611
2612 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2613 Do not dev_put!
1da177e4 2614 */
439e2385 2615 if (how) {
1da177e4 2616 idev->dead = 1;
8814c4b5
YH		 2617
2618 /* protected by rtnl_lock */
2619 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2620
2621 /* Step 1.5: remove snmp6 entry */
2622 snmp6_unregister_dev(idev);
2623
2624 }
2625
2626 /* Step 2: clear hash table */
2627 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2628 bifa = &inet6_addr_lst[i];
2629
2630 write_lock_bh(&addrconf_hash_lock);
2631 while ((ifa = *bifa) != NULL) {
2632 if (ifa->idev == idev) {
2633 *bifa = ifa->lst_next;
2634 ifa->lst_next = NULL;
2635 addrconf_del_timer(ifa);
2636 in6_ifa_put(ifa);
2637 continue;
2638 }
2639 bifa = &ifa->lst_next;
2640 }
2641 write_unlock_bh(&addrconf_hash_lock);
2642 }
2643
2644 write_lock_bh(&idev->lock);
2645
2646 /* Step 3: clear flags for stateless addrconf */
439e2385 2647 if (!how)
3c21edbd 2648 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2649
2650 /* Step 4: clear address list */
2651#ifdef CONFIG_IPV6_PRIVACY
439e2385 2652 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2653 in6_dev_put(idev);
2654
2655 /* clear tempaddr list */
2656 while ((ifa = idev->tempaddr_list) != NULL) {
2657 idev->tempaddr_list = ifa->tmp_next;
2658 ifa->tmp_next = NULL;
2659 ifa->dead = 1;
2660 write_unlock_bh(&idev->lock);
2661 spin_lock_bh(&ifa->lock);
2662
2663 if (ifa->ifpub) {
2664 in6_ifa_put(ifa->ifpub);
2665 ifa->ifpub = NULL;
2666 }
2667 spin_unlock_bh(&ifa->lock);
2668 in6_ifa_put(ifa);
2669 write_lock_bh(&idev->lock);
2670 }
2671#endif
2672 while ((ifa = idev->addr_list) != NULL) {
2673 idev->addr_list = ifa->if_next;
2674 ifa->if_next = NULL;
2675 ifa->dead = 1;
2676 addrconf_del_timer(ifa);
2677 write_unlock_bh(&idev->lock);
2678
2679 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2680 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2681 in6_ifa_put(ifa);
2682
2683 write_lock_bh(&idev->lock);
2684 }
2685 write_unlock_bh(&idev->lock);
2686
2687 /* Step 5: Discard multicast list */
2688
439e2385 2689 if (how)
1da177e4
LT		 2690 ipv6_mc_destroy_dev(idev);
2691 else
2692 ipv6_mc_down(idev);
2693
1da177e4 2694 idev->tstamp = jiffies;
1ab1457c 2695
1da177e4
LT		 2696 /* Shot the device (if unregistered) */
2697
439e2385 2698 if (how) {
408c4768 2699 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2700 neigh_parms_release(&nd_tbl, idev->nd_parms);
2701 neigh_ifdown(&nd_tbl, dev);
2702 in6_dev_put(idev);
2703 }
2704 return 0;
2705}
2706
2707static void addrconf_rs_timer(unsigned long data)
2708{
2709 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2710
2711 if (ifp->idev->cnf.forwarding)
2712 goto out;
2713
2714 if (ifp->idev->if_flags & IF_RA_RCVD) {
2715 /*
2716 * Announcement received after solicitation
2717 * was sent
2718 */
2719 goto out;
2720 }
2721
2722 spin_lock(&ifp->lock);
2723 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
1da177e4
LT		 2724 /* The wait after the last probe can be shorter */
2725 addrconf_mod_timer(ifp, AC_RS,
2726 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2727 ifp->idev->cnf.rtr_solicit_delay :
2728 ifp->idev->cnf.rtr_solicit_interval);
2729 spin_unlock(&ifp->lock);
2730
f3ee4010 2731 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2732 } else {
2733 spin_unlock(&ifp->lock);
2734 /*
2735 * Note: we do not support deprecated "all on-link"
2736 * assumption any longer.
2737 */
2738 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2739 ifp->idev->dev->name);
2740 }
2741
2742out:
2743 in6_ifa_put(ifp);
2744}
2745
2746/*
2747 * Duplicate Address Detection
2748 */
3c21edbd
YH		 2749static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2750{
2751 unsigned long rand_num;
2752 struct inet6_dev *idev = ifp->idev;
2753
95c385b4
NH		 2754 if (ifp->flags & IFA_F_OPTIMISTIC)
2755 rand_num = 0;
2756 else
2757 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2758
3c21edbd
YH		 2759 ifp->probes = idev->cnf.dad_transmits;
2760 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2761}
2762
e431b8c0 2763static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2764{
2765 struct inet6_dev *idev = ifp->idev;
2766 struct net_device *dev = idev->dev;
1da177e4
LT		 2767
2768 addrconf_join_solict(dev, &ifp->addr);
2769
1da177e4 2770 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2771
2772 read_lock_bh(&idev->lock);
2773 if (ifp->dead)
2774 goto out;
2775 spin_lock_bh(&ifp->lock);
2776
2777 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2778 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2779 !(ifp->flags&IFA_F_TENTATIVE) ||
2780 ifp->flags & IFA_F_NODAD) {
95c385b4 2781 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2782 spin_unlock_bh(&ifp->lock);
2783 read_unlock_bh(&idev->lock);
2784
2785 addrconf_dad_completed(ifp);
2786 return;
2787 }
2788
6732bade 2789 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2790 spin_unlock_bh(&ifp->lock);
6732bade 2791 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2792 /*
2793 * If the defice is not ready:
2794 * - keep it tentative if it is a permanent address.
2795 * - otherwise, kill it.
2796 */
2797 in6_ifa_hold(ifp);
2798 addrconf_dad_stop(ifp);
6732bade 2799 return;
3c21edbd 2800 }
95c385b4
NH		 2801
2802 /*
2803 * Optimistic nodes can start receiving
2804 * Frames right away
2805 */
2806 if(ifp->flags & IFA_F_OPTIMISTIC)
2807 ip6_ins_rt(ifp->rt);
2808
6732bade
YH		 2809 addrconf_dad_kick(ifp);
2810 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2811out:
2812 read_unlock_bh(&idev->lock);
2813}
2814
2815static void addrconf_dad_timer(unsigned long data)
2816{
2817 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2818 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2819 struct in6_addr mcaddr;
2820
2821 read_lock_bh(&idev->lock);
2822 if (idev->dead) {
2823 read_unlock_bh(&idev->lock);
2824 goto out;
2825 }
1b34be74
YH		 2826 if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) {
2827 read_unlock_bh(&idev->lock);
2828 addrconf_dad_failure(ifp);
2829 return;
2830 }
1da177e4
LT		 2831 spin_lock_bh(&ifp->lock);
2832 if (ifp->probes == 0) {
2833 /*
2834 * DAD was successful
2835 */
2836
95c385b4 2837 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2838 spin_unlock_bh(&ifp->lock);
2839 read_unlock_bh(&idev->lock);
2840
2841 addrconf_dad_completed(ifp);
2842
2843 goto out;
2844 }
2845
2846 ifp->probes--;
2847 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2848 spin_unlock_bh(&ifp->lock);
2849 read_unlock_bh(&idev->lock);
2850
2851 /* send a neighbour solicitation for our addr */
1da177e4 2852 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2853 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2854out:
2855 in6_ifa_put(ifp);
2856}
2857
2858static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2859{
2860 struct net_device * dev = ifp->idev->dev;
2861
2862 /*
2863 * Configure the address for reception. Now it is valid.
2864 */
2865
2866 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2867
2868 /* If added prefix is link local and forwarding is off,
2869 start sending router solicitations.
2870 */
2871
2872 if (ifp->idev->cnf.forwarding == 0 &&
2873 ifp->idev->cnf.rtr_solicits > 0 &&
2874 (dev->flags&IFF_LOOPBACK) == 0 &&
2875 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2876 /*
2877 * If a host as already performed a random delay
2878 * [...] as part of DAD [...] there is no need
2879 * to delay again before sending the first RS
2880 */
f3ee4010 2881 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2882
2883 spin_lock_bh(&ifp->lock);
2884 ifp->probes = 1;
2885 ifp->idev->if_flags |= IF_RS_SENT;
2886 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2887 spin_unlock_bh(&ifp->lock);
2888 }
2889}
2890
c5e33bdd
YH		 2891static void addrconf_dad_run(struct inet6_dev *idev) {
2892 struct inet6_ifaddr *ifp;
2893
2894 read_lock_bh(&idev->lock);
2895 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2896 spin_lock_bh(&ifp->lock);
2897 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2898 spin_unlock_bh(&ifp->lock);
2899 continue;
2900 }
2901 spin_unlock_bh(&ifp->lock);
2902 addrconf_dad_kick(ifp);
2903 }
2904 read_unlock_bh(&idev->lock);
2905}
2906
1da177e4
LT		 2907#ifdef CONFIG_PROC_FS
2908struct if6_iter_state {
3c40090a 2909 struct seq_net_private p;
1da177e4
LT		 2910 int bucket;
2911};
2912
2913static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2914{
2915 struct inet6_ifaddr *ifa = NULL;
2916 struct if6_iter_state *state = seq->private;
1218854a 2917 struct net *net = seq_file_net(seq);
1da177e4
LT		 2918
2919 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2920 ifa = inet6_addr_lst[state->bucket];
3c40090a 2921
878628fb 2922 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
3c40090a 2923 ifa = ifa->lst_next;
1da177e4
LT		 2924 if (ifa)
2925 break;
2926 }
2927 return ifa;
2928}
2929
2930static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2931{
2932 struct if6_iter_state *state = seq->private;
1218854a 2933 struct net *net = seq_file_net(seq);
1da177e4
LT		 2934
2935 ifa = ifa->lst_next;
2936try_again:
3c40090a 2937 if (ifa) {
878628fb 2938 if (!net_eq(dev_net(ifa->idev->dev), net)) {
3c40090a
DL		 2939 ifa = ifa->lst_next;
2940 goto try_again;
2941 }
2942 }
2943
1da177e4
LT		 2944 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2945 ifa = inet6_addr_lst[state->bucket];
2946 goto try_again;
2947 }
3c40090a 2948
1da177e4
LT		 2949 return ifa;
2950}
2951
2952static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2953{
2954 struct inet6_ifaddr *ifa = if6_get_first(seq);
2955
2956 if (ifa)
2957 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2958 --pos;
2959 return pos ? NULL : ifa;
2960}
2961
2962static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 2963 __acquires(addrconf_hash_lock)
1da177e4
LT		 2964{
2965 read_lock_bh(&addrconf_hash_lock);
2966 return if6_get_idx(seq, *pos);
2967}
2968
2969static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2970{
2971 struct inet6_ifaddr *ifa;
2972
2973 ifa = if6_get_next(seq, v);
2974 ++*pos;
2975 return ifa;
2976}
2977
2978static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 2979 __releases(addrconf_hash_lock)
1da177e4
LT		 2980{
2981 read_unlock_bh(&addrconf_hash_lock);
2982}
2983
2984static int if6_seq_show(struct seq_file *seq, void *v)
2985{
2986 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2987 seq_printf(seq,
9343e79a 2988 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2989 NIP6(ifp->addr),
2990 ifp->idev->dev->ifindex,
2991 ifp->prefix_len,
2992 ifp->scope,
2993 ifp->flags,
2994 ifp->idev->dev->name);
2995 return 0;
2996}
2997
56b3d975 2998static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2999 .start = if6_seq_start,
3000 .next = if6_seq_next,
3001 .show = if6_seq_show,
3002 .stop = if6_seq_stop,
3003};
3004
3005static int if6_seq_open(struct inode *inode, struct file *file)
3006{
3c40090a
DL		 3007 return seq_open_net(inode, file, &if6_seq_ops,
3008 sizeof(struct if6_iter_state));
1da177e4
LT		 3009}
3010
9a32144e 3011static const struct file_operations if6_fops = {
1da177e4
LT		 3012 .owner = THIS_MODULE,
3013 .open = if6_seq_open,
3014 .read = seq_read,
3015 .llseek = seq_lseek,
3c40090a 3016 .release = seq_release_net,
1da177e4
LT		 3017};
3018
3c40090a 3019static int if6_proc_net_init(struct net *net)
1da177e4 3020{
3c40090a 3021 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3022 return -ENOMEM;
3023 return 0;
3024}
3025
3c40090a
DL		 3026static void if6_proc_net_exit(struct net *net)
3027{
3028 proc_net_remove(net, "if_inet6");
3029}
3030
3031static struct pernet_operations if6_proc_net_ops = {
3032 .init = if6_proc_net_init,
3033 .exit = if6_proc_net_exit,
3034};
3035
3036int __init if6_proc_init(void)
3037{
3038 return register_pernet_subsys(&if6_proc_net_ops);
3039}
3040
1da177e4
LT		 3041void if6_proc_exit(void)
3042{
3c40090a 3043 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3044}
3045#endif /* CONFIG_PROC_FS */
3046
59fbb3a6 3047#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3048/* Check if address is a home address configured on any interface. */
389f6612 3049int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3050{
3051 int ret = 0;
3052 struct inet6_ifaddr * ifp;
3053 u8 hash = ipv6_addr_hash(addr);
3054 read_lock_bh(&addrconf_hash_lock);
3055 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
878628fb 3056 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3057 continue;
caad295f 3058 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3059 (ifp->flags & IFA_F_HOMEADDRESS)) {
3060 ret = 1;
3061 break;
3062 }
3063 }
3064 read_unlock_bh(&addrconf_hash_lock);
3065 return ret;
3066}
3067#endif
3068
1da177e4
LT		 3069/*
3070 * Periodic address status verification
3071 */
3072
3073static void addrconf_verify(unsigned long foo)
3074{
3075 struct inet6_ifaddr *ifp;
3076 unsigned long now, next;
3077 int i;
3078
3079 spin_lock_bh(&addrconf_verify_lock);
3080 now = jiffies;
3081 next = now + ADDR_CHECK_FREQUENCY;
3082
3083 del_timer(&addr_chk_timer);
3084
3085 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3086
3087restart:
5d5780df 3088 read_lock(&addrconf_hash_lock);
1da177e4
LT		 3089 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3090 unsigned long age;
3091#ifdef CONFIG_IPV6_PRIVACY
3092 unsigned long regen_advance;
3093#endif
3094
3095 if (ifp->flags & IFA_F_PERMANENT)
3096 continue;
3097
3098 spin_lock(&ifp->lock);
3099 age = (now - ifp->tstamp) / HZ;
3100
3101#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 3102 regen_advance = ifp->idev->cnf.regen_max_retry *
3103 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 3104 ifp->idev->nd_parms->retrans_time / HZ;
3105#endif
3106
8f27ebb9
YH		 3107 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3108 age >= ifp->valid_lft) {
1da177e4
LT		 3109 spin_unlock(&ifp->lock);
3110 in6_ifa_hold(ifp);
5d5780df 3111 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3112 ipv6_del_addr(ifp);
3113 goto restart;
8f27ebb9
YH		 3114 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3115 spin_unlock(&ifp->lock);
3116 continue;
1da177e4
LT		 3117 } else if (age >= ifp->prefered_lft) {
3118 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3119 int deprecate = 0;
3120
3121 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3122 deprecate = 1;
3123 ifp->flags |= IFA_F_DEPRECATED;
3124 }
3125
3126 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3127 next = ifp->tstamp + ifp->valid_lft * HZ;
3128
3129 spin_unlock(&ifp->lock);
3130
3131 if (deprecate) {
3132 in6_ifa_hold(ifp);
5d5780df 3133 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3134
3135 ipv6_ifa_notify(0, ifp);
3136 in6_ifa_put(ifp);
3137 goto restart;
3138 }
3139#ifdef CONFIG_IPV6_PRIVACY
3140 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3141 !(ifp->flags&IFA_F_TENTATIVE)) {
3142 if (age >= ifp->prefered_lft - regen_advance) {
3143 struct inet6_ifaddr *ifpub = ifp->ifpub;
3144 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3145 next = ifp->tstamp + ifp->prefered_lft * HZ;
3146 if (!ifp->regen_count && ifpub) {
3147 ifp->regen_count++;
3148 in6_ifa_hold(ifp);
3149 in6_ifa_hold(ifpub);
3150 spin_unlock(&ifp->lock);
5d5780df 3151 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3152 spin_lock(&ifpub->lock);
3153 ifpub->regen_count = 0;
3154 spin_unlock(&ifpub->lock);
1da177e4
LT		 3155 ipv6_create_tempaddr(ifpub, ifp);
3156 in6_ifa_put(ifpub);
3157 in6_ifa_put(ifp);
3158 goto restart;
3159 }
3160 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3161 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3162 spin_unlock(&ifp->lock);
3163#endif
3164 } else {
3165 /* ifp->prefered_lft <= ifp->valid_lft */
3166 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3167 next = ifp->tstamp + ifp->prefered_lft * HZ;
3168 spin_unlock(&ifp->lock);
3169 }
3170 }
5d5780df 3171 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3172 }
3173
3174 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3175 add_timer(&addr_chk_timer);
3176 spin_unlock_bh(&addrconf_verify_lock);
3177}
3178
461d8837
TG		 3179static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3180{
3181 struct in6_addr *pfx = NULL;
3182
3183 if (addr)
3184 pfx = nla_data(addr);
3185
3186 if (local) {
3187 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3188 pfx = NULL;
3189 else
3190 pfx = nla_data(local);
3191 }
3192
3193 return pfx;
3194}
3195
ef7c79ed 3196static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3197 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3198 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3199 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3200};
3201
1da177e4
LT		 3202static int
3203inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3204{
3b1e0a65 3205 struct net *net = sock_net(skb->sk);
b933f716
TG		 3206 struct ifaddrmsg *ifm;
3207 struct nlattr *tb[IFA_MAX+1];
1da177e4 3208 struct in6_addr *pfx;
b933f716 3209 int err;
1da177e4 3210
b933f716
TG		 3211 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3212 if (err < 0)
3213 return err;
3214
3215 ifm = nlmsg_data(nlh);
3216 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3217 if (pfx == NULL)
3218 return -EINVAL;
3219
af284937 3220 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3221}
3222
55ebaef1
NT		 3223static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3224 u32 prefered_lft, u32 valid_lft)
081bba5b 3225{
6f704992
YH		 3226 u32 flags;
3227 clock_t expires;
4bed72e4 3228 unsigned long timeout;
46d48046 3229
081bba5b
NT		 3230 if (!valid_lft || (prefered_lft > valid_lft))
3231 return -EINVAL;
3232
4bed72e4
YH		 3233 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3234 if (addrconf_finite_timeout(timeout)) {
3235 expires = jiffies_to_clock_t(timeout * HZ);
3236 valid_lft = timeout;
6f704992 3237 flags = RTF_EXPIRES;
4bed72e4
YH		 3238 } else {
3239 expires = 0;
3240 flags = 0;
3241 ifa_flags |= IFA_F_PERMANENT;
6f704992 3242 }
081bba5b 3243
4bed72e4
YH		 3244 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3245 if (addrconf_finite_timeout(timeout)) {
3246 if (timeout == 0)
3247 ifa_flags |= IFA_F_DEPRECATED;
3248 prefered_lft = timeout;
3249 }
081bba5b
NT		 3250
3251 spin_lock_bh(&ifp->lock);
3b9f9a1c 3252 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3253 ifp->tstamp = jiffies;
3254 ifp->valid_lft = valid_lft;
3255 ifp->prefered_lft = prefered_lft;
3256
3257 spin_unlock_bh(&ifp->lock);
3258 if (!(ifp->flags&IFA_F_TENTATIVE))
3259 ipv6_ifa_notify(0, ifp);
081bba5b 3260
46d48046 3261 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3262 expires, flags);
081bba5b
NT		 3263 addrconf_verify(0);
3264
3265 return 0;
3266}
3267
1da177e4
LT		 3268static int
3269inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3270{
3b1e0a65 3271 struct net *net = sock_net(skb->sk);
461d8837
TG		 3272 struct ifaddrmsg *ifm;
3273 struct nlattr *tb[IFA_MAX+1];
1da177e4 3274 struct in6_addr *pfx;
7198f8ce
TG		 3275 struct inet6_ifaddr *ifa;
3276 struct net_device *dev;
55ebaef1
NT		 3277 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3278 u8 ifa_flags;
461d8837 3279 int err;
1da177e4 3280
461d8837
TG		 3281 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3282 if (err < 0)
3283 return err;
3284
3285 ifm = nlmsg_data(nlh);
3286 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3287 if (pfx == NULL)
3288 return -EINVAL;
3289
461d8837 3290 if (tb[IFA_CACHEINFO]) {
0778769d 3291 struct ifa_cacheinfo *ci;
461d8837
TG		 3292
3293 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3294 valid_lft = ci->ifa_valid;
461d8837
TG		 3295 preferred_lft = ci->ifa_prefered;
3296 } else {
3297 preferred_lft = INFINITY_LIFE_TIME;
3298 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3299 }
3300
af284937 3301 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3302 if (dev == NULL)
3303 return -ENODEV;
3304
55ebaef1 3305 /* We ignore other flags so far. */
3b9f9a1c 3306 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3307
1cab3da6 3308 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3309 if (ifa == NULL) {
3310 /*
3311 * It would be best to check for !NLM_F_CREATE here but
3312 * userspace alreay relies on not having to provide this.
3313 */
af284937
DL		 3314 return inet6_addr_add(net, ifm->ifa_index, pfx,
3315 ifm->ifa_prefixlen, ifa_flags,
3316 preferred_lft, valid_lft);
081bba5b
NT		 3317 }
3318
7198f8ce
TG		 3319 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3320 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3321 err = -EEXIST;
3322 else
55ebaef1 3323 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3324
3325 in6_ifa_put(ifa);
3326
3327 return err;
1da177e4
LT		 3328}
3329
101bb229
TG		 3330static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3331 u8 scope, int ifindex)
3332{
3333 struct ifaddrmsg *ifm;
3334
3335 ifm = nlmsg_data(nlh);
3336 ifm->ifa_family = AF_INET6;
3337 ifm->ifa_prefixlen = prefixlen;
3338 ifm->ifa_flags = flags;
3339 ifm->ifa_scope = scope;
3340 ifm->ifa_index = ifindex;
3341}
3342
85486af0
TG		 3343static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3344 unsigned long tstamp, u32 preferred, u32 valid)
3345{
3346 struct ifa_cacheinfo ci;
3347
3348 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3349 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3350 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3351 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3352 ci.ifa_prefered = preferred;
3353 ci.ifa_valid = valid;
3354
3355 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3356}
3357
101bb229
TG		 3358static inline int rt_scope(int ifa_scope)
3359{
3360 if (ifa_scope & IFA_HOST)
3361 return RT_SCOPE_HOST;
3362 else if (ifa_scope & IFA_LINK)
3363 return RT_SCOPE_LINK;
3364 else if (ifa_scope & IFA_SITE)
3365 return RT_SCOPE_SITE;
3366 else
3367 return RT_SCOPE_UNIVERSE;
3368}
3369
0ab6803b
TG		 3370static inline int inet6_ifaddr_msgsize(void)
3371{
339bf98f
TG		 3372 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3373 + nla_total_size(16) /* IFA_ADDRESS */
3374 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3375}
c5396a31 3376
1da177e4 3377static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3378 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3379{
1da177e4 3380 struct nlmsghdr *nlh;
85486af0 3381 u32 preferred, valid;
1da177e4 3382
0ab6803b
TG		 3383 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3384 if (nlh == NULL)
26932566 3385 return -EMSGSIZE;
0ab6803b 3386
101bb229
TG		 3387 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3388 ifa->idev->dev->ifindex);
3389
1da177e4 3390 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3391 preferred = ifa->prefered_lft;
3392 valid = ifa->valid_lft;
3393 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3394 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3395 preferred -= tval;
3396 if (valid != INFINITY_LIFE_TIME)
3397 valid -= tval;
1da177e4
LT		 3398 }
3399 } else {
85486af0
TG		 3400 preferred = INFINITY_LIFE_TIME;
3401 valid = INFINITY_LIFE_TIME;
3402 }
3403
0ab6803b 3404 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3405 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3406 nlmsg_cancel(skb, nlh);
3407 return -EMSGSIZE;
3408 }
1da177e4 3409
0ab6803b 3410 return nlmsg_end(skb, nlh);
1da177e4
LT		 3411}
3412
3413static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3414 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3415{
1da177e4 3416 struct nlmsghdr *nlh;
101bb229
TG		 3417 u8 scope = RT_SCOPE_UNIVERSE;
3418 int ifindex = ifmca->idev->dev->ifindex;
3419
3420 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3421 scope = RT_SCOPE_SITE;
1da177e4 3422
0ab6803b
TG		 3423 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3424 if (nlh == NULL)
26932566 3425 return -EMSGSIZE;
85486af0 3426
0ab6803b
TG		 3427 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3428 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3429 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3430 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3431 nlmsg_cancel(skb, nlh);
3432 return -EMSGSIZE;
3433 }
85486af0 3434
0ab6803b 3435 return nlmsg_end(skb, nlh);
1da177e4
LT		 3436}
3437
3438static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3439 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3440{
1da177e4 3441 struct nlmsghdr *nlh;
101bb229
TG		 3442 u8 scope = RT_SCOPE_UNIVERSE;
3443 int ifindex = ifaca->aca_idev->dev->ifindex;
3444
3445 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3446 scope = RT_SCOPE_SITE;
1da177e4 3447
0ab6803b
TG		 3448 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3449 if (nlh == NULL)
26932566 3450 return -EMSGSIZE;
85486af0 3451
0ab6803b
TG		 3452 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3453 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3454 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3455 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3456 nlmsg_cancel(skb, nlh);
3457 return -EMSGSIZE;
3458 }
1da177e4 3459
0ab6803b 3460 return nlmsg_end(skb, nlh);
1da177e4
LT		 3461}
3462
3463enum addr_type_t
3464{
3465 UNICAST_ADDR,
3466 MULTICAST_ADDR,
3467 ANYCAST_ADDR,
3468};
3469
3470static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3471 enum addr_type_t type)
3472{
3473 int idx, ip_idx;
3474 int s_idx, s_ip_idx;
3475 int err = 1;
3476 struct net_device *dev;
3477 struct inet6_dev *idev = NULL;
3478 struct inet6_ifaddr *ifa;
3479 struct ifmcaddr6 *ifmca;
3480 struct ifacaddr6 *ifaca;
3b1e0a65 3481 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3482
3483 s_idx = cb->args[0];
3484 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3485
7562f876 3486 idx = 0;
6fda7350 3487 for_each_netdev(net, dev) {
1da177e4 3488 if (idx < s_idx)
7562f876 3489 goto cont;
1da177e4
LT		 3490 if (idx > s_idx)
3491 s_ip_idx = 0;
3492 ip_idx = 0;
3493 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3494 goto cont;
1da177e4
LT		 3495 read_lock_bh(&idev->lock);
3496 switch (type) {
3497 case UNICAST_ADDR:
ae9cda5d 3498 /* unicast address incl. temp addr */
1da177e4
LT		 3499 for (ifa = idev->addr_list; ifa;
3500 ifa = ifa->if_next, ip_idx++) {
3501 if (ip_idx < s_ip_idx)
3502 continue;
5d5619b4
YH		 3503 err = inet6_fill_ifaddr(skb, ifa,
3504 NETLINK_CB(cb->skb).pid,
3505 cb->nlh->nlmsg_seq,
3506 RTM_NEWADDR,
3507 NLM_F_MULTI);
1da177e4 3508 }
1da177e4
LT		 3509 break;
3510 case MULTICAST_ADDR:
3511 /* multicast address */
1ab1457c 3512 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3513 ifmca = ifmca->next, ip_idx++) {
3514 if (ip_idx < s_ip_idx)
3515 continue;
5d5619b4
YH		 3516 err = inet6_fill_ifmcaddr(skb, ifmca,
3517 NETLINK_CB(cb->skb).pid,
3518 cb->nlh->nlmsg_seq,
3519 RTM_GETMULTICAST,
3520 NLM_F_MULTI);
1da177e4
LT		 3521 }
3522 break;
3523 case ANYCAST_ADDR:
3524 /* anycast address */
3525 for (ifaca = idev->ac_list; ifaca;
3526 ifaca = ifaca->aca_next, ip_idx++) {
3527 if (ip_idx < s_ip_idx)
3528 continue;
5d5619b4
YH		 3529 err = inet6_fill_ifacaddr(skb, ifaca,
3530 NETLINK_CB(cb->skb).pid,
3531 cb->nlh->nlmsg_seq,
3532 RTM_GETANYCAST,
3533 NLM_F_MULTI);
1da177e4
LT		 3534 }
3535 break;
3536 default:
3537 break;
3538 }
3539 read_unlock_bh(&idev->lock);
3540 in6_dev_put(idev);
5d5619b4
YH		 3541
3542 if (err <= 0)
3543 break;
7562f876
PE		 3544cont:
3545 idx++;
1da177e4 3546 }
1da177e4
LT		 3547 cb->args[0] = idx;
3548 cb->args[1] = ip_idx;
3549 return skb->len;
3550}
3551
3552static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3553{
3554 enum addr_type_t type = UNICAST_ADDR;
b854272b 3555
1da177e4
LT		 3556 return inet6_dump_addr(skb, cb, type);
3557}
3558
3559static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3560{
3561 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3562
1da177e4
LT		 3563 return inet6_dump_addr(skb, cb, type);
3564}
3565
3566
3567static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3568{
3569 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3570
1da177e4
LT		 3571 return inet6_dump_addr(skb, cb, type);
3572}
3573
1b29fc2c
TG		 3574static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3575 void *arg)
6c223828 3576{
3b1e0a65 3577 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3578 struct ifaddrmsg *ifm;
3579 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3580 struct in6_addr *addr = NULL;
3581 struct net_device *dev = NULL;
3582 struct inet6_ifaddr *ifa;
3583 struct sk_buff *skb;
6c223828
NT		 3584 int err;
3585
1b29fc2c
TG		 3586 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3587 if (err < 0)
3588 goto errout;
3589
3590 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3591 if (addr == NULL) {
3592 err = -EINVAL;
3593 goto errout;
6c223828 3594 }
6c223828 3595
1b29fc2c 3596 ifm = nlmsg_data(nlh);
6c223828 3597 if (ifm->ifa_index)
6fda7350 3598 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3599
1cab3da6 3600 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3601 err = -EADDRNOTAVAIL;
3602 goto errout;
3603 }
6c223828 3604
0ab6803b 3605 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3606 err = -ENOBUFS;
1b29fc2c 3607 goto errout_ifa;
6c223828
NT		 3608 }
3609
6c223828
NT		 3610 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3611 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3612 if (err < 0) {
3613 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3614 WARN_ON(err == -EMSGSIZE);
3615 kfree_skb(skb);
3616 goto errout_ifa;
3617 }
6fda7350 3618 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3619errout_ifa:
6c223828 3620 in6_ifa_put(ifa);
1b29fc2c 3621errout:
6c223828 3622 return err;
6c223828
NT		 3623}
3624
1da177e4
LT		 3625static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3626{
3627 struct sk_buff *skb;
c346dca1 3628 struct net *net = dev_net(ifa->idev->dev);
5d620266 3629 int err = -ENOBUFS;
1da177e4 3630
0ab6803b 3631 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3632 if (skb == NULL)
3633 goto errout;
3634
3635 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3636 if (err < 0) {
3637 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3638 WARN_ON(err == -EMSGSIZE);
3639 kfree_skb(skb);
3640 goto errout;
3641 }
6fda7350 3642 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
5d620266
TG		 3643errout:
3644 if (err < 0)
6fda7350 3645 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3646}
3647
b6f99a21 3648static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3649 __s32 *array, int bytes)
3650{
04561c1f
TG		 3651 BUG_ON(bytes < (DEVCONF_MAX * 4));
3652
1da177e4
LT		 3653 memset(array, 0, bytes);
3654 array[DEVCONF_FORWARDING] = cnf->forwarding;
3655 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3656 array[DEVCONF_MTU6] = cnf->mtu6;
3657 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3658 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3659 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3660 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3661 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3662 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3663 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3664 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3665#ifdef CONFIG_IPV6_PRIVACY
3666 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3667 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3668 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3669 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3670 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3671#endif
3672 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3673 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3674 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3675#ifdef CONFIG_IPV6_ROUTER_PREF
3676 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3677 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3678#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3679 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3680#endif
930d6ff2 3681#endif
fbea49e1 3682 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3683 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3684#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3685 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3686#endif
7bc570c8
YH		 3687#ifdef CONFIG_IPV6_MROUTE
3688 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3689#endif
778d80be 3690 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3691 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
1da177e4
LT		 3692}
3693
339bf98f
TG		 3694static inline size_t inet6_if_nlmsg_size(void)
3695{
3696 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3697 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3698 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3699 + nla_total_size(4) /* IFLA_MTU */
3700 + nla_total_size(4) /* IFLA_LINK */
3701 + nla_total_size( /* IFLA_PROTINFO */
3702 nla_total_size(4) /* IFLA_INET6_FLAGS */
3703 + nla_total_size(sizeof(struct ifla_cacheinfo))
3704 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3705 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3706 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3707 );
3708}
c5396a31 3709
7f7d9a6b
HX		 3710static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3711 int bytes)
3712{
3713 int i;
3714 int pad = bytes - sizeof(u64) * items;
3715 BUG_ON(pad < 0);
3716
3717 /* Use put_unaligned() because stats may not be aligned for u64. */
3718 put_unaligned(items, &stats[0]);
3719 for (i = 1; i < items; i++)
3720 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3721
3722 memset(&stats[items], 0, pad);
3723}
3724
3725static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3726 int bytes)
3727{
3728 switch(attrtype) {
3729 case IFLA_INET6_STATS:
3730 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3731 break;
3732 case IFLA_INET6_ICMP6STATS:
3733 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3734 break;
3735 }
3736}
3737
1ab1457c 3738static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3739 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3740{
04561c1f 3741 struct net_device *dev = idev->dev;
bf99f1bd 3742 struct nlattr *nla;
04561c1f
TG		 3743 struct ifinfomsg *hdr;
3744 struct nlmsghdr *nlh;
3745 void *protoinfo;
3746 struct ifla_cacheinfo ci;
3747
3748 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3749 if (nlh == NULL)
26932566 3750 return -EMSGSIZE;
04561c1f
TG		 3751
3752 hdr = nlmsg_data(nlh);
3753 hdr->ifi_family = AF_INET6;
3754 hdr->__ifi_pad = 0;
3755 hdr->ifi_type = dev->type;
3756 hdr->ifi_index = dev->ifindex;
3757 hdr->ifi_flags = dev_get_flags(dev);
3758 hdr->ifi_change = 0;
3759
3760 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3761
3762 if (dev->addr_len)
04561c1f 3763 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3764
04561c1f 3765 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3766 if (dev->ifindex != dev->iflink)
04561c1f 3767 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3768
04561c1f
TG		 3769 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3770 if (protoinfo == NULL)
3771 goto nla_put_failure;
1da177e4 3772
04561c1f 3773 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3774
1da177e4
LT		 3775 ci.max_reasm_len = IPV6_MAXPLEN;
3776 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3777 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3778 ci.reachable_time = idev->nd_parms->reachable_time;
3779 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3780 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3781
bf99f1bd
YH		 3782 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3783 if (nla == NULL)
04561c1f 3784 goto nla_put_failure;
bf99f1bd 3785 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3786
bf99f1bd
YH		 3787 /* XXX - MC not implemented */
3788
3789 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3790 if (nla == NULL)
3791 goto nla_put_failure;
3792 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3793
3794 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3795 if (nla == NULL)
3796 goto nla_put_failure;
3797 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3798
04561c1f
TG		 3799 nla_nest_end(skb, protoinfo);
3800 return nlmsg_end(skb, nlh);
1da177e4 3801
04561c1f 3802nla_put_failure:
26932566
PM		 3803 nlmsg_cancel(skb, nlh);
3804 return -EMSGSIZE;
1da177e4
LT		 3805}
3806
3807static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3808{
3b1e0a65 3809 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3810 int idx, err;
3811 int s_idx = cb->args[0];
3812 struct net_device *dev;
3813 struct inet6_dev *idev;
3814
3815 read_lock(&dev_base_lock);
7562f876 3816 idx = 0;
6fda7350 3817 for_each_netdev(net, dev) {
1da177e4 3818 if (idx < s_idx)
7562f876 3819 goto cont;
1da177e4 3820 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3821 goto cont;
1ab1457c 3822 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3823 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3824 in6_dev_put(idev);
3825 if (err <= 0)
3826 break;
7562f876
PE		 3827cont:
3828 idx++;
1da177e4
LT		 3829 }
3830 read_unlock(&dev_base_lock);
3831 cb->args[0] = idx;
3832
3833 return skb->len;
3834}
3835
3836void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3837{
3838 struct sk_buff *skb;
c346dca1 3839 struct net *net = dev_net(idev->dev);
8d7a76c9 3840 int err = -ENOBUFS;
1ab1457c 3841
339bf98f 3842 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3843 if (skb == NULL)
3844 goto errout;
3845
3846 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3847 if (err < 0) {
3848 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3849 WARN_ON(err == -EMSGSIZE);
3850 kfree_skb(skb);
3851 goto errout;
3852 }
6fda7350 3853 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
8d7a76c9
TG		 3854errout:
3855 if (err < 0)
6fda7350 3856 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3857}
3858
339bf98f
TG		 3859static inline size_t inet6_prefix_nlmsg_size(void)
3860{
3861 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3862 + nla_total_size(sizeof(struct in6_addr))
3863 + nla_total_size(sizeof(struct prefix_cacheinfo));
3864}
c5396a31 3865
1da177e4 3866static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3867 struct prefix_info *pinfo, u32 pid, u32 seq,
3868 int event, unsigned int flags)
1da177e4 3869{
6051e2f4
TG		 3870 struct prefixmsg *pmsg;
3871 struct nlmsghdr *nlh;
1da177e4
LT		 3872 struct prefix_cacheinfo ci;
3873
6051e2f4
TG		 3874 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3875 if (nlh == NULL)
26932566 3876 return -EMSGSIZE;
6051e2f4
TG		 3877
3878 pmsg = nlmsg_data(nlh);
1da177e4 3879 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3880 pmsg->prefix_pad1 = 0;
3881 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3882 pmsg->prefix_ifindex = idev->dev->ifindex;
3883 pmsg->prefix_len = pinfo->prefix_len;
3884 pmsg->prefix_type = pinfo->type;
8a47077a 3885 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3886 pmsg->prefix_flags = 0;
3887 if (pinfo->onlink)
3888 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3889 if (pinfo->autoconf)
3890 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3891
6051e2f4 3892 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3893
3894 ci.preferred_time = ntohl(pinfo->prefered);
3895 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3896 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3897
6051e2f4 3898 return nlmsg_end(skb, nlh);
1da177e4 3899
6051e2f4 3900nla_put_failure:
26932566
PM		 3901 nlmsg_cancel(skb, nlh);
3902 return -EMSGSIZE;
1da177e4
LT		 3903}
3904
1ab1457c 3905static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3906 struct prefix_info *pinfo)
3907{
3908 struct sk_buff *skb;
c346dca1 3909 struct net *net = dev_net(idev->dev);
8c384bfa 3910 int err = -ENOBUFS;
1da177e4 3911
339bf98f 3912 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3913 if (skb == NULL)
3914 goto errout;
3915
3916 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3917 if (err < 0) {
3918 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3919 WARN_ON(err == -EMSGSIZE);
3920 kfree_skb(skb);
3921 goto errout;
3922 }
6fda7350 3923 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
8c384bfa
TG		 3924errout:
3925 if (err < 0)
6fda7350 3926 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3927}
3928
1da177e4
LT		 3929static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3930{
3931 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3932
3933 switch (event) {
3934 case RTM_NEWADDR:
95c385b4
NH		 3935 /*
3936 * If the address was optimistic
3937 * we inserted the route at the start of
3938 * our DAD process, so we don't need
3939 * to do it again
3940 */
3941 if (!(ifp->rt->rt6i_node))
3942 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3943 if (ifp->idev->cnf.forwarding)
3944 addrconf_join_anycast(ifp);
3945 break;
3946 case RTM_DELADDR:
3947 if (ifp->idev->cnf.forwarding)
3948 addrconf_leave_anycast(ifp);
3949 addrconf_leave_solict(ifp->idev, &ifp->addr);
3950 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3951 if (ip6_del_rt(ifp->rt))
1da177e4 3952 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3953 break;
3954 }
3955}
3956
3957static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3958{
8814c4b5 3959 rcu_read_lock_bh();
1da177e4
LT		 3960 if (likely(ifp->idev->dead == 0))
3961 __ipv6_ifa_notify(event, ifp);
8814c4b5 3962 rcu_read_unlock_bh();
1da177e4
LT		 3963}
3964
3965#ifdef CONFIG_SYSCTL
3966
3967static
3968int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3969 void __user *buffer, size_t *lenp, loff_t *ppos)
3970{
3971 int *valp = ctl->data;
3972 int val = *valp;
3973 int ret;
3974
3975 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3976
c8fecf22
PE		 3977 if (write)
3978 addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3979 return ret;
1da177e4
LT		 3980}
3981
1ab1457c 3982static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3983 int __user *name, int nlen,
3984 void __user *oldval,
3985 size_t __user *oldlenp,
1f29bcd7 3986 void __user *newval, size_t newlen)
1da177e4
LT		 3987{
3988 int *valp = table->data;
c8fecf22 3989 int val = *valp;
1da177e4
LT		 3990 int new;
3991
3992 if (!newval || !newlen)
3993 return 0;
3994 if (newlen != sizeof(int))
3995 return -EINVAL;
3996 if (get_user(new, (int __user *)newval))
3997 return -EFAULT;
3998 if (new == *valp)
3999 return 0;
4000 if (oldval && oldlenp) {
4001 size_t len;
4002 if (get_user(len, oldlenp))
4003 return -EFAULT;
4004 if (len) {
4005 if (len > table->maxlen)
4006 len = table->maxlen;
4007 if (copy_to_user(oldval, valp, len))
4008 return -EFAULT;
4009 if (put_user(len, oldlenp))
4010 return -EFAULT;
4011 }
4012 }
4013
c8fecf22
PE		 4014 *valp = new;
4015 addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 4016 return 1;
4017}
4018
4019static struct addrconf_sysctl_table
4020{
4021 struct ctl_table_header *sysctl_header;
f6a07b29 4022 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4023 char *dev_name;
ab32ea5d 4024} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4025 .sysctl_header = NULL,
4026 .addrconf_vars = {
1ab1457c 4027 {
1da177e4
LT		 4028 .ctl_name = NET_IPV6_FORWARDING,
4029 .procname = "forwarding",
1ab1457c 4030 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 4031 .maxlen = sizeof(int),
4032 .mode = 0644,
1ab1457c 4033 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 4034 .strategy = &addrconf_sysctl_forward_strategy,
4035 },
4036 {
4037 .ctl_name = NET_IPV6_HOP_LIMIT,
4038 .procname = "hop_limit",
1ab1457c 4039 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 4040 .maxlen = sizeof(int),
4041 .mode = 0644,
4042 .proc_handler = proc_dointvec,
4043 },
4044 {
4045 .ctl_name = NET_IPV6_MTU,
4046 .procname = "mtu",
4047 .data = &ipv6_devconf.mtu6,
1ab1457c 4048 .maxlen = sizeof(int),
1da177e4 4049 .mode = 0644,
1ab1457c 4050 .proc_handler = &proc_dointvec,
1da177e4
LT		 4051 },
4052 {
4053 .ctl_name = NET_IPV6_ACCEPT_RA,
4054 .procname = "accept_ra",
1ab1457c 4055 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 4056 .maxlen = sizeof(int),
4057 .mode = 0644,
1ab1457c 4058 .proc_handler = &proc_dointvec,
1da177e4
LT		 4059 },
4060 {
4061 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4062 .procname = "accept_redirects",
1ab1457c 4063 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 4064 .maxlen = sizeof(int),
4065 .mode = 0644,
1ab1457c 4066 .proc_handler = &proc_dointvec,
1da177e4
LT		 4067 },
4068 {
4069 .ctl_name = NET_IPV6_AUTOCONF,
4070 .procname = "autoconf",
1ab1457c 4071 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 4072 .maxlen = sizeof(int),
4073 .mode = 0644,
1ab1457c 4074 .proc_handler = &proc_dointvec,
1da177e4
LT		 4075 },
4076 {
4077 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4078 .procname = "dad_transmits",
1ab1457c 4079 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 4080 .maxlen = sizeof(int),
4081 .mode = 0644,
1ab1457c 4082 .proc_handler = &proc_dointvec,
1da177e4
LT		 4083 },
4084 {
4085 .ctl_name = NET_IPV6_RTR_SOLICITS,
4086 .procname = "router_solicitations",
1ab1457c 4087 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 4088 .maxlen = sizeof(int),
4089 .mode = 0644,
1ab1457c 4090 .proc_handler = &proc_dointvec,
1da177e4
LT		 4091 },
4092 {
4093 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4094 .procname = "router_solicitation_interval",
1ab1457c 4095 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 4096 .maxlen = sizeof(int),
4097 .mode = 0644,
1ab1457c 4098 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 4099 .strategy = &sysctl_jiffies,
4100 },
4101 {
4102 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4103 .procname = "router_solicitation_delay",
1ab1457c 4104 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 4105 .maxlen = sizeof(int),
4106 .mode = 0644,
1ab1457c 4107 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 4108 .strategy = &sysctl_jiffies,
4109 },
4110 {
4111 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4112 .procname = "force_mld_version",
1ab1457c 4113 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 4114 .maxlen = sizeof(int),
4115 .mode = 0644,
1ab1457c 4116 .proc_handler = &proc_dointvec,
1da177e4
LT		 4117 },
4118#ifdef CONFIG_IPV6_PRIVACY
4119 {
4120 .ctl_name = NET_IPV6_USE_TEMPADDR,
4121 .procname = "use_tempaddr",
1ab1457c 4122 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 4123 .maxlen = sizeof(int),
4124 .mode = 0644,
1ab1457c 4125 .proc_handler = &proc_dointvec,
1da177e4
LT		 4126 },
4127 {
4128 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4129 .procname = "temp_valid_lft",
1ab1457c 4130 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4131 .maxlen = sizeof(int),
4132 .mode = 0644,
1ab1457c 4133 .proc_handler = &proc_dointvec,
1da177e4
LT		 4134 },
4135 {
4136 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4137 .procname = "temp_prefered_lft",
1ab1457c 4138 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4139 .maxlen = sizeof(int),
4140 .mode = 0644,
1ab1457c 4141 .proc_handler = &proc_dointvec,
1da177e4
LT		 4142 },
4143 {
4144 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4145 .procname = "regen_max_retry",
1ab1457c 4146 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4147 .maxlen = sizeof(int),
4148 .mode = 0644,
1ab1457c 4149 .proc_handler = &proc_dointvec,
1da177e4
LT		 4150 },
4151 {
4152 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4153 .procname = "max_desync_factor",
1ab1457c 4154 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4155 .maxlen = sizeof(int),
4156 .mode = 0644,
1ab1457c 4157 .proc_handler = &proc_dointvec,
1da177e4
LT		 4158 },
4159#endif
4160 {
4161 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4162 .procname = "max_addresses",
4163 .data = &ipv6_devconf.max_addresses,
4164 .maxlen = sizeof(int),
4165 .mode = 0644,
4166 .proc_handler = &proc_dointvec,
4167 },
65f5c7c1
YH		 4168 {
4169 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4170 .procname = "accept_ra_defrtr",
1ab1457c 4171 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4172 .maxlen = sizeof(int),
4173 .mode = 0644,
1ab1457c 4174 .proc_handler = &proc_dointvec,
65f5c7c1 4175 },
c4fd30eb
YH		 4176 {
4177 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4178 .procname = "accept_ra_pinfo",
1ab1457c 4179 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4180 .maxlen = sizeof(int),
4181 .mode = 0644,
1ab1457c 4182 .proc_handler = &proc_dointvec,
c4fd30eb 4183 },
930d6ff2
YH		 4184#ifdef CONFIG_IPV6_ROUTER_PREF
4185 {
4186 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4187 .procname = "accept_ra_rtr_pref",
4188 .data = &ipv6_devconf.accept_ra_rtr_pref,
4189 .maxlen = sizeof(int),
4190 .mode = 0644,
4191 .proc_handler = &proc_dointvec,
4192 },
52e16356
YH		 4193 {
4194 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4195 .procname = "router_probe_interval",
4196 .data = &ipv6_devconf.rtr_probe_interval,
4197 .maxlen = sizeof(int),
4198 .mode = 0644,
4199 .proc_handler = &proc_dointvec_jiffies,
4200 .strategy = &sysctl_jiffies,
4201 },
fa03ef38 4202#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4203 {
4204 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4205 .procname = "accept_ra_rt_info_max_plen",
4206 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4207 .maxlen = sizeof(int),
4208 .mode = 0644,
4209 .proc_handler = &proc_dointvec,
4210 },
4211#endif
930d6ff2 4212#endif
fbea49e1
YH		 4213 {
4214 .ctl_name = NET_IPV6_PROXY_NDP,
4215 .procname = "proxy_ndp",
4216 .data = &ipv6_devconf.proxy_ndp,
4217 .maxlen = sizeof(int),
4218 .mode = 0644,
4219 .proc_handler = &proc_dointvec,
4220 },
0bcbc926
YH		 4221 {
4222 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4223 .procname = "accept_source_route",
4224 .data = &ipv6_devconf.accept_source_route,
4225 .maxlen = sizeof(int),
4226 .mode = 0644,
4227 .proc_handler = &proc_dointvec,
4228 },
95c385b4
NH		 4229#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4230 {
4231 .ctl_name = CTL_UNNUMBERED,
4232 .procname = "optimistic_dad",
4233 .data = &ipv6_devconf.optimistic_dad,
4234 .maxlen = sizeof(int),
4235 .mode = 0644,
4236 .proc_handler = &proc_dointvec,
4237
4238 },
7bc570c8
YH		 4239#endif
4240#ifdef CONFIG_IPV6_MROUTE
4241 {
4242 .ctl_name = CTL_UNNUMBERED,
4243 .procname = "mc_forwarding",
4244 .data = &ipv6_devconf.mc_forwarding,
4245 .maxlen = sizeof(int),
4246 .mode = 0644,
4247 .proc_handler = &proc_dointvec,
4248 },
95c385b4 4249#endif
778d80be
YH		 4250 {
4251 .ctl_name = CTL_UNNUMBERED,
4252 .procname = "disable_ipv6",
4253 .data = &ipv6_devconf.disable_ipv6,
4254 .maxlen = sizeof(int),
4255 .mode = 0644,
4256 .proc_handler = &proc_dointvec,
4257 },
1b34be74
YH		 4258 {
4259 .ctl_name = CTL_UNNUMBERED,
4260 .procname = "accept_dad",
4261 .data = &ipv6_devconf.accept_dad,
4262 .maxlen = sizeof(int),
4263 .mode = 0644,
4264 .proc_handler = &proc_dointvec,
4265 },
1da177e4
LT		 4266 {
4267 .ctl_name = 0, /* sentinel */
4268 }
4269 },
1da177e4
LT		 4270};
4271
bff16c2f
PE		 4272static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4273 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4274{
4275 int i;
1da177e4 4276 struct addrconf_sysctl_table *t;
1da177e4 4277
1dab6222
PE		 4278#define ADDRCONF_CTL_PATH_DEV 3
4279
4280 struct ctl_path addrconf_ctl_path[] = {
4281 { .procname = "net", .ctl_name = CTL_NET, },
4282 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4283 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4284 { /* to be set */ },
4285 { },
4286 };
4287
4288
af879cc7 4289 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4290 if (t == NULL)
f68635e6
PE		 4291 goto out;
4292
1da177e4
LT		 4293 for (i=0; t->addrconf_vars[i].data; i++) {
4294 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4295 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4296 t->addrconf_vars[i].extra2 = net;
1da177e4 4297 }
1da177e4 4298
1ab1457c
YH		 4299 /*
4300 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4301 * by sysctl and we wouldn't want anyone to change it under our feet
4302 * (see SIOCSIFNAME).
1ab1457c 4303 */
1dab6222
PE		 4304 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4305 if (!t->dev_name)
f68635e6 4306 goto free;
1da177e4 4307
1dab6222
PE		 4308 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4309 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4310
bff16c2f 4311 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4312 t->addrconf_vars);
1da177e4
LT		 4313 if (t->sysctl_header == NULL)
4314 goto free_procname;
f68635e6
PE		 4315
4316 p->sysctl = t;
95897312 4317 return 0;
1da177e4 4318
f68635e6 4319free_procname:
1dab6222 4320 kfree(t->dev_name);
f68635e6 4321free:
1da177e4 4322 kfree(t);
f68635e6 4323out:
95897312 4324 return -ENOBUFS;
1da177e4
LT		 4325}
4326
408c4768
PE		 4327static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4328{
4329 struct addrconf_sysctl_table *t;
4330
4331 if (p->sysctl == NULL)
4332 return;
4333
4334 t = p->sysctl;
4335 p->sysctl = NULL;
4336 unregister_sysctl_table(t->sysctl_header);
4337 kfree(t->dev_name);
4338 kfree(t);
4339}
4340
f52295a9
PE		 4341static void addrconf_sysctl_register(struct inet6_dev *idev)
4342{
408c4768
PE		 4343 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4344 NET_IPV6_NEIGH, "ipv6",
4345 &ndisc_ifinfo_sysctl_change,
0686caa3 4346 ndisc_ifinfo_sysctl_strategy);
c346dca1 4347 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
bff16c2f 4348 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4349}
4350
408c4768 4351static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4352{
408c4768
PE		 4353 __addrconf_sysctl_unregister(&idev->cnf);
4354 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4355}
4356
4357
4358#endif
4359
e0da5a48
PE		 4360static int addrconf_init_net(struct net *net)
4361{
4362 int err;
4363 struct ipv6_devconf *all, *dflt;
4364
4365 err = -ENOMEM;
4366 all = &ipv6_devconf;
4367 dflt = &ipv6_devconf_dflt;
4368
4369 if (net != &init_net) {
4370 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4371 if (all == NULL)
4372 goto err_alloc_all;
4373
4374 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4375 if (dflt == NULL)
4376 goto err_alloc_dflt;
4377 }
4378
4379 net->ipv6.devconf_all = all;
4380 net->ipv6.devconf_dflt = dflt;
4381
4382#ifdef CONFIG_SYSCTL
4383 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4384 NULL, all);
4385 if (err < 0)
4386 goto err_reg_all;
4387
4388 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4389 NULL, dflt);
4390 if (err < 0)
4391 goto err_reg_dflt;
4392#endif
4393 return 0;
4394
4395#ifdef CONFIG_SYSCTL
4396err_reg_dflt:
4397 __addrconf_sysctl_unregister(all);
4398err_reg_all:
4399 kfree(dflt);
4400#endif
4401err_alloc_dflt:
4402 kfree(all);
4403err_alloc_all:
4404 return err;
4405}
4406
4407static void addrconf_exit_net(struct net *net)
4408{
4409#ifdef CONFIG_SYSCTL
4410 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4411 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4412#endif
4413 if (net != &init_net) {
4414 kfree(net->ipv6.devconf_dflt);
4415 kfree(net->ipv6.devconf_all);
4416 }
4417}
4418
4419static struct pernet_operations addrconf_ops = {
4420 .init = addrconf_init_net,
4421 .exit = addrconf_exit_net,
4422};
4423
1da177e4
LT		 4424/*
4425 * Device notifier
4426 */
4427
4428int register_inet6addr_notifier(struct notifier_block *nb)
4429{
1ab1457c 4430 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4431}
4432
7159039a
YH		 4433EXPORT_SYMBOL(register_inet6addr_notifier);
4434
1da177e4
LT		 4435int unregister_inet6addr_notifier(struct notifier_block *nb)
4436{
1ab1457c 4437 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4438}
4439
7159039a
YH		 4440EXPORT_SYMBOL(unregister_inet6addr_notifier);
4441
af284937
DL		 4442static void addrconf_net_exit(struct net *net)
4443{
6fda7350
BT		 4444 struct net_device *dev;
4445
6fda7350
BT		 4446 rtnl_lock();
4447 /* clean dev list */
4448 for_each_netdev(net, dev) {
4449 if (__in6_dev_get(dev) == NULL)
4450 continue;
4451 addrconf_ifdown(dev, 1);
4452 }
4453 addrconf_ifdown(net->loopback_dev, 2);
4454 rtnl_unlock();
af284937
DL		 4455}
4456
4457static struct pernet_operations addrconf_net_ops = {
af284937
DL		 4458 .exit = addrconf_net_exit,
4459};
4460
1da177e4
LT		 4461/*
4462 * Init / cleanup code
4463 */
4464
4465int __init addrconf_init(void)
4466{
2a8cc6c8
YH		 4467 int err;
4468
4469 if ((err = ipv6_addr_label_init()) < 0) {
4470 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4471 err);
4472 return err;
4473 }
1da177e4 4474
e0da5a48
PE		 4475 register_pernet_subsys(&addrconf_ops);
4476
1da177e4
LT		 4477 /* The addrconf netdev notifier requires that loopback_dev
4478 * has it's ipv6 private information allocated and setup
4479 * before it can bring up and give link-local addresses
4480 * to other devices which are up.
4481 *
4482 * Unfortunately, loopback_dev is not necessarily the first
4483 * entry in the global dev_base list of net devices. In fact,
4484 * it is likely to be the very last entry on that list.
4485 * So this causes the notifier registry below to try and
4486 * give link-local addresses to all devices besides loopback_dev
4487 * first, then loopback_dev, which cases all the non-loopback_dev
4488 * devices to fail to get a link-local address.
4489 *
4490 * So, as a temporary fix, allocate the ipv6 structure for
4491 * loopback_dev first by hand.
4492 * Longer term, all of the dependencies ipv6 has upon the loopback
4493 * device and it being up should be removed.
4494 */
4495 rtnl_lock();
2774c7ab 4496 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4497 err = -ENOMEM;
4498 rtnl_unlock();
4499 if (err)
e0da5a48 4500 goto errlo;
1da177e4 4501
af284937
DL		 4502 err = register_pernet_device(&addrconf_net_ops);
4503 if (err)
4504 return err;
4505
1da177e4
LT		 4506 register_netdevice_notifier(&ipv6_dev_notf);
4507
1da177e4 4508 addrconf_verify(0);
c127ea2c
TG		 4509
4510 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4511 if (err < 0)
4512 goto errout;
4513
4514 /* Only the first call to __rtnl_register can fail */
4515 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4516 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4517 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4518 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4519 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4520
2a8cc6c8
YH		 4521 ipv6_addr_label_rtnl_register();
4522
1da177e4 4523 return 0;
c127ea2c
TG		 4524errout:
4525 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4526errlo:
4527 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4528
4529 return err;
1da177e4
LT		 4530}
4531
09f7709f 4532void addrconf_cleanup(void)
1da177e4 4533{
1ab1457c 4534 struct inet6_ifaddr *ifa;
1da177e4
LT		 4535 int i;
4536
4537 unregister_netdevice_notifier(&ipv6_dev_notf);
af284937 4538 unregister_pernet_device(&addrconf_net_ops);
1da177e4 4539
e0da5a48 4540 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4541
4542 rtnl_lock();
4543
1da177e4
LT		 4544 /*
4545 * Check hash table.
4546 */
1da177e4
LT		 4547 write_lock_bh(&addrconf_hash_lock);
4548 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4549 for (ifa=inet6_addr_lst[i]; ifa; ) {
4550 struct inet6_ifaddr *bifa;
4551
4552 bifa = ifa;
4553 ifa = ifa->lst_next;
4554 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4555 /* Do not free it; something is wrong.
4556 Now we can investigate it with debugger.
4557 */
4558 }
4559 }
4560 write_unlock_bh(&addrconf_hash_lock);
4561
4562 del_timer(&addr_chk_timer);
1da177e4 4563 rtnl_unlock();
af284937
DL		 4564
4565 unregister_pernet_subsys(&addrconf_net_ops);
1da177e4 4566}
Clone of davem's net-next-2.6 tree