]> bbs.cooldavid.org Git - net-next-2.6.git/blame - net/ipv6/addrconf.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[NETNS][IPV6]: inet6_addr - ipv6_chk_same_addr namespace aware
[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 *
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17/*
18 * Changes:
19 *
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
23 * unload.
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
26 * packets.
27 * yoshfuji@USAGI : Fixed interval between DAD
28 * packets.
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
32 * support.
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
37 * seq_file.
b1cacb68
YH		 38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
40 * status etc.
1da177e4
LT		 41 */
42
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
1da177e4
LT		 47#include <linux/net.h>
48#include <linux/in6.h>
49#include <linux/netdevice.h>
1823730f 50#include <linux/if_addr.h>
1da177e4
LT		 51#include <linux/if_arp.h>
52#include <linux/if_arcnet.h>
53#include <linux/if_infiniband.h>
54#include <linux/route.h>
55#include <linux/inetdevice.h>
56#include <linux/init.h>
57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
5d620266 76#include <net/netlink.h>
f24e3d65 77#include <net/pkt_sched.h>
1da177e4
LT		 78#include <linux/if_tunnel.h>
79#include <linux/rtnetlink.h>
80
81#ifdef CONFIG_IPV6_PRIVACY
82#include <linux/random.h>
1da177e4
LT		 83#endif
84
85#include <asm/uaccess.h>
7f7d9a6b 86#include <asm/unaligned.h>
1da177e4
LT		 87
88#include <linux/proc_fs.h>
89#include <linux/seq_file.h>
90
91/* Set to 3 to get tracing... */
92#define ACONF_DEBUG 2
93
94#if ACONF_DEBUG >= 3
95#define ADBG(x) printk x
96#else
97#define ADBG(x)
98#endif
99
100#define INFINITY_LIFE_TIME 0xFFFFFFFF
101#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102
103#ifdef CONFIG_SYSCTL
f52295a9 104static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 105static void addrconf_sysctl_unregister(struct inet6_dev *idev);
106#else
107static inline void addrconf_sysctl_register(struct inet6_dev *idev)
108{
109}
110
111static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
112{
113}
1da177e4
LT		 114#endif
115
116#ifdef CONFIG_IPV6_PRIVACY
117static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 118static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 119static void ipv6_regen_rndid(unsigned long data);
120
121static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 122#endif
123
124static int ipv6_count_addresses(struct inet6_dev *idev);
125
126/*
127 * Configured unicast address hash table
128 */
129static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130static DEFINE_RWLOCK(addrconf_hash_lock);
131
1da177e4
LT		 132static void addrconf_verify(unsigned long);
133
8d06afab 134static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 135static DEFINE_SPINLOCK(addrconf_verify_lock);
136
137static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139
140static int addrconf_ifdown(struct net_device *dev, int how);
141
e431b8c0 142static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 143static void addrconf_dad_timer(unsigned long data);
144static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 145static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 146static void addrconf_rs_timer(unsigned long data);
147static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
149
1ab1457c 150static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 151 struct prefix_info *pinfo);
06bfe655
DL		 152static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
153 struct net_device *dev);
1da177e4 154
e041c683 155static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 156
ab32ea5d 157struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 158 .forwarding = 0,
159 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
160 .mtu6 = IPV6_MIN_MTU,
161 .accept_ra = 1,
162 .accept_redirects = 1,
163 .autoconf = 1,
164 .force_mld_version = 0,
165 .dad_transmits = 1,
166 .rtr_solicits = MAX_RTR_SOLICITATIONS,
167 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
168 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
169#ifdef CONFIG_IPV6_PRIVACY
170 .use_tempaddr = 0,
171 .temp_valid_lft = TEMP_VALID_LIFETIME,
172 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
173 .regen_max_retry = REGEN_MAX_RETRY,
174 .max_desync_factor = MAX_DESYNC_FACTOR,
175#endif
176 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 177 .accept_ra_defrtr = 1,
c4fd30eb 178 .accept_ra_pinfo = 1,
930d6ff2
YH		 179#ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref = 1,
52e16356 181 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 182#ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen = 0,
184#endif
930d6ff2 185#endif
fbea49e1 186 .proxy_ndp = 0,
0bcbc926 187 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 188};
189
ab32ea5d 190static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 191 .forwarding = 0,
192 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
193 .mtu6 = IPV6_MIN_MTU,
194 .accept_ra = 1,
195 .accept_redirects = 1,
196 .autoconf = 1,
197 .dad_transmits = 1,
198 .rtr_solicits = MAX_RTR_SOLICITATIONS,
199 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
200 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
201#ifdef CONFIG_IPV6_PRIVACY
202 .use_tempaddr = 0,
203 .temp_valid_lft = TEMP_VALID_LIFETIME,
204 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
205 .regen_max_retry = REGEN_MAX_RETRY,
206 .max_desync_factor = MAX_DESYNC_FACTOR,
207#endif
208 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 209 .accept_ra_defrtr = 1,
c4fd30eb 210 .accept_ra_pinfo = 1,
930d6ff2
YH		 211#ifdef CONFIG_IPV6_ROUTER_PREF
212 .accept_ra_rtr_pref = 1,
52e16356 213 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 214#ifdef CONFIG_IPV6_ROUTE_INFO
215 .accept_ra_rt_info_max_plen = 0,
216#endif
930d6ff2 217#endif
fbea49e1 218 .proxy_ndp = 0,
0bcbc926 219 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 220};
221
222/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 223const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4
LT		 224const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
225
f24e3d65
MC		 226/* Check if a valid qdisc is available */
227static inline int addrconf_qdisc_ok(struct net_device *dev)
228{
229 return (dev->qdisc != &noop_qdisc);
230}
231
1da177e4
LT		 232static void addrconf_del_timer(struct inet6_ifaddr *ifp)
233{
234 if (del_timer(&ifp->timer))
235 __in6_ifa_put(ifp);
236}
237
238enum addrconf_timer_t
239{
240 AC_NONE,
241 AC_DAD,
242 AC_RS,
243};
244
245static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
246 enum addrconf_timer_t what,
247 unsigned long when)
248{
249 if (!del_timer(&ifp->timer))
250 in6_ifa_hold(ifp);
251
252 switch (what) {
253 case AC_DAD:
254 ifp->timer.function = addrconf_dad_timer;
255 break;
256 case AC_RS:
257 ifp->timer.function = addrconf_rs_timer;
258 break;
259 default:;
260 }
261 ifp->timer.expires = jiffies + when;
262 add_timer(&ifp->timer);
263}
264
7f7d9a6b
HX		 265static int snmp6_alloc_dev(struct inet6_dev *idev)
266{
7f7d9a6b 267 if (snmp_mib_init((void **)idev->stats.ipv6,
c69bce20 268 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b
HX		 269 goto err_ip;
270 if (snmp_mib_init((void **)idev->stats.icmpv6,
c69bce20 271 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 272 goto err_icmp;
14878f75 273 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
c69bce20 274 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 275 goto err_icmpmsg;
7f7d9a6b
HX		 276
277 return 0;
278
14878f75
DS		 279err_icmpmsg:
280 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 281err_icmp:
282 snmp_mib_free((void **)idev->stats.ipv6);
283err_ip:
aaf70ec7 284 return -ENOMEM;
7f7d9a6b
HX		 285}
286
16910b98 287static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 288{
14878f75 289 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 290 snmp_mib_free((void **)idev->stats.icmpv6);
291 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 292}
293
1da177e4
LT		 294/* Nobody refers to this device, we may destroy it. */
295
8814c4b5
YH		 296static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
297{
298 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
299 kfree(idev);
300}
301
1da177e4
LT		 302void in6_dev_finish_destroy(struct inet6_dev *idev)
303{
304 struct net_device *dev = idev->dev;
305 BUG_TRAP(idev->addr_list==NULL);
306 BUG_TRAP(idev->mc_list==NULL);
307#ifdef NET_REFCNT_DEBUG
308 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
309#endif
310 dev_put(dev);
311 if (!idev->dead) {
312 printk("Freeing alive inet6 device %p\n", idev);
313 return;
314 }
315 snmp6_free_dev(idev);
8814c4b5 316 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 317}
318
7159039a
YH		 319EXPORT_SYMBOL(in6_dev_finish_destroy);
320
1da177e4
LT		 321static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
322{
323 struct inet6_dev *ndev;
d88ae4cc 324 struct in6_addr maddr;
1da177e4
LT		 325
326 ASSERT_RTNL();
327
328 if (dev->mtu < IPV6_MIN_MTU)
329 return NULL;
330
1ab1457c 331 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 332
1ab1457c
YH		 333 if (ndev == NULL)
334 return NULL;
322f74a4
IO		 335
336 rwlock_init(&ndev->lock);
337 ndev->dev = dev;
441fc2a2 338 memcpy(&ndev->cnf, dev->nd_net->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 339 ndev->cnf.mtu6 = dev->mtu;
340 ndev->cnf.sysctl = NULL;
341 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
342 if (ndev->nd_parms == NULL) {
343 kfree(ndev);
344 return NULL;
345 }
346 /* We refer to the device */
347 dev_hold(dev);
1da177e4 348
322f74a4
IO		 349 if (snmp6_alloc_dev(ndev) < 0) {
350 ADBG((KERN_WARNING
351 "%s(): cannot allocate memory for statistics; dev=%s.\n",
352 __FUNCTION__, dev->name));
353 neigh_parms_release(&nd_tbl, ndev->nd_parms);
354 ndev->dead = 1;
355 in6_dev_finish_destroy(ndev);
356 return NULL;
357 }
1da177e4 358
322f74a4
IO		 359 if (snmp6_register_dev(ndev) < 0) {
360 ADBG((KERN_WARNING
361 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
362 __FUNCTION__, dev->name));
363 neigh_parms_release(&nd_tbl, ndev->nd_parms);
364 ndev->dead = 1;
365 in6_dev_finish_destroy(ndev);
366 return NULL;
367 }
368
369 /* One reference from device. We must do this before
370 * we invoke __ipv6_regen_rndid().
371 */
372 in6_dev_hold(ndev);
1da177e4
LT		 373
374#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 375 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 376 if ((dev->flags&IFF_LOOPBACK) ||
377 dev->type == ARPHRD_TUNNEL ||
0be669bb
JR		 378#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
379 dev->type == ARPHRD_SIT ||
380#endif
381 dev->type == ARPHRD_NONE) {
322f74a4
IO		 382 printk(KERN_INFO
383 "%s: Disabled Privacy Extensions\n",
384 dev->name);
385 ndev->cnf.use_tempaddr = -1;
c7dc89c0
FT		 386
387 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
388 printk(KERN_INFO
389 "%s: Disabled Multicast RS\n",
390 dev->name);
391 ndev->cnf.rtr_solicits = 0;
392 }
322f74a4
IO		 393 } else {
394 in6_dev_hold(ndev);
395 ipv6_regen_rndid((unsigned long) ndev);
396 }
1da177e4
LT		 397#endif
398
f24e3d65 399 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 400 ndev->if_flags |= IF_READY;
401
322f74a4
IO		 402 ipv6_mc_init_dev(ndev);
403 ndev->tstamp = jiffies;
f52295a9 404 addrconf_sysctl_register(ndev);
30c4cf57
DS		 405 /* protected by rtnl_lock */
406 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 407
408 /* Join all-node multicast group */
409 ipv6_addr_all_nodes(&maddr);
410 ipv6_dev_mc_inc(dev, &maddr);
411
1da177e4
LT		 412 return ndev;
413}
414
415static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
416{
417 struct inet6_dev *idev;
418
419 ASSERT_RTNL();
420
421 if ((idev = __in6_dev_get(dev)) == NULL) {
422 if ((idev = ipv6_add_dev(dev)) == NULL)
423 return NULL;
424 }
c5e33bdd 425
1da177e4
LT		 426 if (dev->flags&IFF_UP)
427 ipv6_mc_up(idev);
428 return idev;
429}
430
431#ifdef CONFIG_SYSCTL
432static void dev_forward_change(struct inet6_dev *idev)
433{
434 struct net_device *dev;
435 struct inet6_ifaddr *ifa;
436 struct in6_addr addr;
437
438 if (!idev)
439 return;
440 dev = idev->dev;
441 if (dev && (dev->flags & IFF_MULTICAST)) {
442 ipv6_addr_all_routers(&addr);
1ab1457c 443
1da177e4
LT		 444 if (idev->cnf.forwarding)
445 ipv6_dev_mc_inc(dev, &addr);
446 else
447 ipv6_dev_mc_dec(dev, &addr);
448 }
449 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 450 if (ifa->flags&IFA_F_TENTATIVE)
451 continue;
1da177e4
LT		 452 if (idev->cnf.forwarding)
453 addrconf_join_anycast(ifa);
454 else
455 addrconf_leave_anycast(ifa);
456 }
457}
458
459
e186932b 460static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 461{
462 struct net_device *dev;
463 struct inet6_dev *idev;
464
465 read_lock(&dev_base_lock);
bff16c2f 466 for_each_netdev(net, dev) {
8814c4b5 467 rcu_read_lock();
1da177e4
LT		 468 idev = __in6_dev_get(dev);
469 if (idev) {
e186932b
PE		 470 int changed = (!idev->cnf.forwarding) ^ (!newf);
471 idev->cnf.forwarding = newf;
1da177e4
LT		 472 if (changed)
473 dev_forward_change(idev);
474 }
8814c4b5 475 rcu_read_unlock();
1da177e4
LT		 476 }
477 read_unlock(&dev_base_lock);
478}
c8fecf22
PE		 479
480static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
481{
bff16c2f
PE		 482 struct net *net;
483
484 net = (struct net *)table->extra2;
441fc2a2 485 if (p == &net->ipv6.devconf_dflt->forwarding)
c8fecf22
PE		 486 return;
487
e186932b
PE		 488 if (p == &net->ipv6.devconf_all->forwarding) {
489 __s32 newf = net->ipv6.devconf_all->forwarding;
490 net->ipv6.devconf_dflt->forwarding = newf;
491 addrconf_forward_change(net, newf);
c8fecf22
PE		 492 } else if ((!*p) ^ (!old))
493 dev_forward_change((struct inet6_dev *)table->extra1);
494
495 if (*p)
496 rt6_purge_dflt_routers();
497}
1da177e4
LT		 498#endif
499
500/* Nobody refers to this ifaddr, destroy it */
501
502void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
503{
504 BUG_TRAP(ifp->if_next==NULL);
505 BUG_TRAP(ifp->lst_next==NULL);
506#ifdef NET_REFCNT_DEBUG
507 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
508#endif
509
510 in6_dev_put(ifp->idev);
511
512 if (del_timer(&ifp->timer))
513 printk("Timer is still running, when freeing ifa=%p\n", ifp);
514
515 if (!ifp->dead) {
516 printk("Freeing alive inet6 address %p\n", ifp);
517 return;
518 }
519 dst_release(&ifp->rt->u.dst);
520
521 kfree(ifp);
522}
523
e55ffac6
BH		 524static void
525ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
526{
527 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 528 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 529
530 /*
531 * Each device address list is sorted in order of scope -
532 * global before linklocal.
533 */
534 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
535 ifap = &ifa->if_next) {
8a6ce0c0 536 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 537 break;
538 }
539
540 ifp->if_next = *ifap;
541 *ifap = ifp;
542}
543
1da177e4
LT		 544/* On success it returns ifp with increased reference count */
545
546static struct inet6_ifaddr *
547ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 548 int scope, u32 flags)
1da177e4
LT		 549{
550 struct inet6_ifaddr *ifa = NULL;
551 struct rt6_info *rt;
552 int hash;
553 int err = 0;
554
8814c4b5 555 rcu_read_lock_bh();
1da177e4
LT		 556 if (idev->dead) {
557 err = -ENODEV; /*XXX*/
558 goto out2;
559 }
560
561 write_lock(&addrconf_hash_lock);
562
563 /* Ignore adding duplicate addresses on an interface */
06bfe655 564 if (ipv6_chk_same_addr(&init_net, addr, idev->dev)) {
1da177e4
LT		 565 ADBG(("ipv6_add_addr: already assigned\n"));
566 err = -EEXIST;
567 goto out;
568 }
569
322f74a4 570 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 571
572 if (ifa == NULL) {
573 ADBG(("ipv6_add_addr: malloc failed\n"));
574 err = -ENOBUFS;
575 goto out;
576 }
577
578 rt = addrconf_dst_alloc(idev, addr, 0);
579 if (IS_ERR(rt)) {
580 err = PTR_ERR(rt);
581 goto out;
582 }
583
1da177e4
LT		 584 ipv6_addr_copy(&ifa->addr, addr);
585
586 spin_lock_init(&ifa->lock);
587 init_timer(&ifa->timer);
588 ifa->timer.data = (unsigned long) ifa;
589 ifa->scope = scope;
590 ifa->prefix_len = pfxlen;
591 ifa->flags = flags | IFA_F_TENTATIVE;
592 ifa->cstamp = ifa->tstamp = jiffies;
593
57f5f544
KF		 594 ifa->rt = rt;
595
95c385b4
NH		 596 /*
597 * part one of RFC 4429, section 3.3
598 * We should not configure an address as
599 * optimistic if we do not yet know the link
600 * layer address of our nexhop router
601 */
602
603 if (rt->rt6i_nexthop == NULL)
604 ifa->flags &= ~IFA_F_OPTIMISTIC;
605
1da177e4
LT		 606 ifa->idev = idev;
607 in6_dev_hold(idev);
608 /* For caller */
609 in6_ifa_hold(ifa);
610
611 /* Add to big hash table */
612 hash = ipv6_addr_hash(addr);
613
614 ifa->lst_next = inet6_addr_lst[hash];
615 inet6_addr_lst[hash] = ifa;
616 in6_ifa_hold(ifa);
617 write_unlock(&addrconf_hash_lock);
618
619 write_lock(&idev->lock);
620 /* Add to inet6_dev unicast addr list. */
e55ffac6 621 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 622
623#ifdef CONFIG_IPV6_PRIVACY
624 if (ifa->flags&IFA_F_TEMPORARY) {
625 ifa->tmp_next = idev->tempaddr_list;
626 idev->tempaddr_list = ifa;
627 in6_ifa_hold(ifa);
628 }
629#endif
630
1da177e4
LT		 631 in6_ifa_hold(ifa);
632 write_unlock(&idev->lock);
633out2:
8814c4b5 634 rcu_read_unlock_bh();
1da177e4 635
fd92833a 636 if (likely(err == 0))
e041c683 637 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 638 else {
639 kfree(ifa);
640 ifa = ERR_PTR(err);
641 }
642
643 return ifa;
644out:
645 write_unlock(&addrconf_hash_lock);
646 goto out2;
647}
648
649/* This function wants to get referenced ifp and releases it before return */
650
651static void ipv6_del_addr(struct inet6_ifaddr *ifp)
652{
653 struct inet6_ifaddr *ifa, **ifap;
654 struct inet6_dev *idev = ifp->idev;
655 int hash;
656 int deleted = 0, onlink = 0;
657 unsigned long expires = jiffies;
658
659 hash = ipv6_addr_hash(&ifp->addr);
660
661 ifp->dead = 1;
662
663 write_lock_bh(&addrconf_hash_lock);
664 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
665 ifap = &ifa->lst_next) {
666 if (ifa == ifp) {
667 *ifap = ifa->lst_next;
668 __in6_ifa_put(ifp);
669 ifa->lst_next = NULL;
670 break;
671 }
672 }
673 write_unlock_bh(&addrconf_hash_lock);
674
675 write_lock_bh(&idev->lock);
676#ifdef CONFIG_IPV6_PRIVACY
677 if (ifp->flags&IFA_F_TEMPORARY) {
678 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
679 ifap = &ifa->tmp_next) {
680 if (ifa == ifp) {
681 *ifap = ifa->tmp_next;
682 if (ifp->ifpub) {
683 in6_ifa_put(ifp->ifpub);
684 ifp->ifpub = NULL;
685 }
686 __in6_ifa_put(ifp);
687 ifa->tmp_next = NULL;
688 break;
689 }
690 }
691 }
692#endif
693
1d142804 694 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 695 if (ifa == ifp) {
696 *ifap = ifa->if_next;
697 __in6_ifa_put(ifp);
698 ifa->if_next = NULL;
699 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
700 break;
701 deleted = 1;
1d142804 702 continue;
1da177e4
LT		 703 } else if (ifp->flags & IFA_F_PERMANENT) {
704 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
705 ifp->prefix_len)) {
706 if (ifa->flags & IFA_F_PERMANENT) {
707 onlink = 1;
708 if (deleted)
709 break;
710 } else {
711 unsigned long lifetime;
712
713 if (!onlink)
714 onlink = -1;
715
716 spin_lock(&ifa->lock);
717 lifetime = min_t(unsigned long,
718 ifa->valid_lft, 0x7fffffffUL/HZ);
719 if (time_before(expires,
720 ifa->tstamp + lifetime * HZ))
721 expires = ifa->tstamp + lifetime * HZ;
722 spin_unlock(&ifa->lock);
723 }
724 }
725 }
1d142804 726 ifap = &ifa->if_next;
1da177e4
LT		 727 }
728 write_unlock_bh(&idev->lock);
729
730 ipv6_ifa_notify(RTM_DELADDR, ifp);
731
e041c683 732 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 733
734 addrconf_del_timer(ifp);
735
736 /*
737 * Purge or update corresponding prefix
738 *
739 * 1) we don't purge prefix here if address was not permanent.
740 * prefix is managed by its own lifetime.
741 * 2) if there're no addresses, delete prefix.
742 * 3) if there're still other permanent address(es),
743 * corresponding prefix is still permanent.
744 * 4) otherwise, update prefix lifetime to the
745 * longest valid lifetime among the corresponding
746 * addresses on the device.
747 * Note: subsequent RA will update lifetime.
748 *
749 * --yoshfuji
750 */
751 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
752 struct in6_addr prefix;
753 struct rt6_info *rt;
754
755 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
756 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
757
758 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
759 if (onlink == 0) {
e0a1ad73 760 ip6_del_rt(rt);
1da177e4
LT		 761 rt = NULL;
762 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
763 rt->rt6i_expires = expires;
764 rt->rt6i_flags |= RTF_EXPIRES;
765 }
766 }
767 dst_release(&rt->u.dst);
768 }
769
770 in6_ifa_put(ifp);
771}
772
773#ifdef CONFIG_IPV6_PRIVACY
774static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
775{
776 struct inet6_dev *idev = ifp->idev;
777 struct in6_addr addr, *tmpaddr;
778 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
779 int tmp_plen;
780 int ret = 0;
781 int max_addresses;
95c385b4 782 u32 addr_flags;
1da177e4
LT		 783
784 write_lock(&idev->lock);
785 if (ift) {
786 spin_lock_bh(&ift->lock);
787 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
788 spin_unlock_bh(&ift->lock);
789 tmpaddr = &addr;
790 } else {
791 tmpaddr = NULL;
792 }
793retry:
794 in6_dev_hold(idev);
795 if (idev->cnf.use_tempaddr <= 0) {
796 write_unlock(&idev->lock);
797 printk(KERN_INFO
798 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
799 in6_dev_put(idev);
800 ret = -1;
801 goto out;
802 }
803 spin_lock_bh(&ifp->lock);
804 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
805 idev->cnf.use_tempaddr = -1; /*XXX*/
806 spin_unlock_bh(&ifp->lock);
807 write_unlock(&idev->lock);
808 printk(KERN_WARNING
809 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
810 in6_dev_put(idev);
811 ret = -1;
812 goto out;
813 }
814 in6_ifa_hold(ifp);
815 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
816 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
817 spin_unlock_bh(&ifp->lock);
818 write_unlock(&idev->lock);
819 printk(KERN_WARNING
820 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
821 in6_ifa_put(ifp);
822 in6_dev_put(idev);
823 ret = -1;
824 goto out;
825 }
826 memcpy(&addr.s6_addr[8], idev->rndid, 8);
827 tmp_valid_lft = min_t(__u32,
828 ifp->valid_lft,
829 idev->cnf.temp_valid_lft);
1ab1457c
YH		 830 tmp_prefered_lft = min_t(__u32,
831 ifp->prefered_lft,
1da177e4
LT		 832 idev->cnf.temp_prefered_lft - desync_factor / HZ);
833 tmp_plen = ifp->prefix_len;
834 max_addresses = idev->cnf.max_addresses;
835 tmp_cstamp = ifp->cstamp;
836 tmp_tstamp = ifp->tstamp;
837 spin_unlock_bh(&ifp->lock);
838
839 write_unlock(&idev->lock);
95c385b4
NH		 840
841 addr_flags = IFA_F_TEMPORARY;
842 /* set in addrconf_prefix_rcv() */
843 if (ifp->flags & IFA_F_OPTIMISTIC)
844 addr_flags |= IFA_F_OPTIMISTIC;
845
1da177e4 846 ift = !max_addresses ||
1ab1457c 847 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 848 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 849 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
850 addr_flags) : NULL;
1da177e4
LT		 851 if (!ift || IS_ERR(ift)) {
852 in6_ifa_put(ifp);
853 in6_dev_put(idev);
854 printk(KERN_INFO
855 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
856 tmpaddr = &addr;
857 write_lock(&idev->lock);
858 goto retry;
859 }
860
861 spin_lock_bh(&ift->lock);
862 ift->ifpub = ifp;
863 ift->valid_lft = tmp_valid_lft;
864 ift->prefered_lft = tmp_prefered_lft;
865 ift->cstamp = tmp_cstamp;
866 ift->tstamp = tmp_tstamp;
867 spin_unlock_bh(&ift->lock);
868
869 addrconf_dad_start(ift, 0);
870 in6_ifa_put(ift);
871 in6_dev_put(idev);
872out:
873 return ret;
874}
875#endif
876
877/*
072047e4 878 * Choose an appropriate source address (RFC3484)
1da177e4 879 */
072047e4
YH		 880struct ipv6_saddr_score {
881 int addr_type;
882 unsigned int attrs;
883 int matchlen;
0d27b427 884 int scope;
072047e4
YH		 885 unsigned int rule;
886};
887
888#define IPV6_SADDR_SCORE_LOCAL 0x0001
889#define IPV6_SADDR_SCORE_PREFERRED 0x0004
890#define IPV6_SADDR_SCORE_HOA 0x0008
891#define IPV6_SADDR_SCORE_OIF 0x0010
892#define IPV6_SADDR_SCORE_LABEL 0x0020
893#define IPV6_SADDR_SCORE_PRIVACY 0x0040
894
b6f99a21 895static inline int ipv6_saddr_preferred(int type)
1da177e4 896{
072047e4
YH		 897 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
898 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
899 return 1;
900 return 0;
1da177e4
LT		 901}
902
072047e4 903int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 904 struct in6_addr *daddr, struct in6_addr *saddr)
905{
072047e4
YH		 906 struct ipv6_saddr_score hiscore;
907 struct inet6_ifaddr *ifa_result = NULL;
908 int daddr_type = __ipv6_addr_type(daddr);
909 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
303065a8
YH		 910 int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0;
911 u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex);
072047e4 912 struct net_device *dev;
1da177e4 913
072047e4 914 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 915
072047e4 916 read_lock(&dev_base_lock);
8814c4b5 917 rcu_read_lock();
1da177e4 918
881d966b 919 for_each_netdev(&init_net, dev) {
072047e4
YH		 920 struct inet6_dev *idev;
921 struct inet6_ifaddr *ifa;
922
923 /* Rule 0: Candidate Source Address (section 4)
924 * - multicast and link-local destination address,
925 * the set of candidate source address MUST only
926 * include addresses assigned to interfaces
927 * belonging to the same link as the outgoing
928 * interface.
929 * (- For site-local destination addresses, the
930 * set of candidate source addresses MUST only
931 * include addresses assigned to interfaces
932 * belonging to the same site as the outgoing
933 * interface.)
934 */
935 if ((daddr_type & IPV6_ADDR_MULTICAST ||
936 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
937 daddr_dev && dev != daddr_dev)
938 continue;
1da177e4 939
1da177e4 940 idev = __in6_dev_get(dev);
072047e4
YH		 941 if (!idev)
942 continue;
943
944 read_lock_bh(&idev->lock);
945 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
946 struct ipv6_saddr_score score;
947
948 score.addr_type = __ipv6_addr_type(&ifa->addr);
949
6b3ae80a
YH		 950 /* Rule 0:
951 * - Tentative Address (RFC2462 section 5.4)
952 * - A tentative address is not considered
953 * "assigned to an interface" in the traditional
95c385b4 954 * sense, unless it is also flagged as optimistic.
6b3ae80a 955 * - Candidate Source Address (section 4)
072047e4
YH		 956 * - In any case, anycast addresses, multicast
957 * addresses, and the unspecified address MUST
958 * NOT be included in a candidate set.
959 */
95c385b4
NH		 960 if ((ifa->flags & IFA_F_TENTATIVE) &&
961 (!(ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 962 continue;
072047e4
YH		 963 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
964 score.addr_type & IPV6_ADDR_MULTICAST)) {
965 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 966 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 967 "assigned as unicast address on %s",
968 dev->name);
969 continue;
970 }
971
972 score.attrs = 0;
973 score.matchlen = 0;
974 score.scope = 0;
975 score.rule = 0;
976
977 if (ifa_result == NULL) {
978 /* record it if the first available entry */
979 goto record_it;
980 }
981
982 /* Rule 1: Prefer same address */
983 if (hiscore.rule < 1) {
984 if (ipv6_addr_equal(&ifa_result->addr, daddr))
985 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
986 hiscore.rule++;
987 }
988 if (ipv6_addr_equal(&ifa->addr, daddr)) {
989 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
990 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
991 score.rule = 1;
992 goto record_it;
1da177e4 993 }
072047e4
YH		 994 } else {
995 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
996 continue;
1da177e4 997 }
1da177e4 998
072047e4
YH		 999 /* Rule 2: Prefer appropriate scope */
1000 if (hiscore.rule < 2) {
1001 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1002 hiscore.rule++;
1003 }
1004 score.scope = __ipv6_addr_src_scope(score.addr_type);
1005 if (hiscore.scope < score.scope) {
1006 if (hiscore.scope < daddr_scope) {
1007 score.rule = 2;
1008 goto record_it;
1009 } else
1010 continue;
1011 } else if (score.scope < hiscore.scope) {
1012 if (score.scope < daddr_scope)
e55ffac6 1013 break; /* addresses sorted by scope */
072047e4
YH		 1014 else {
1015 score.rule = 2;
1016 goto record_it;
1017 }
1018 }
1da177e4 1019
95c385b4 1020 /* Rule 3: Avoid deprecated and optimistic addresses */
072047e4
YH		 1021 if (hiscore.rule < 3) {
1022 if (ipv6_saddr_preferred(hiscore.addr_type) ||
95c385b4
NH		 1023 (((ifa_result->flags &
1024 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
072047e4
YH		 1025 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1026 hiscore.rule++;
1027 }
1028 if (ipv6_saddr_preferred(score.addr_type) ||
6ae5f983 1029 (((ifa->flags &
95c385b4 1030 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
072047e4
YH		 1031 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1032 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1033 score.rule = 3;
1034 goto record_it;
1035 }
1036 } else {
1037 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1038 continue;
1039 }
1da177e4 1040
3b9f9a1c 1041 /* Rule 4: Prefer home address */
59fbb3a6 1042#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 1043 if (hiscore.rule < 4) {
1044 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1045 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1046 hiscore.rule++;
1047 }
1048 if (ifa->flags & IFA_F_HOMEADDRESS) {
1049 score.attrs |= IPV6_SADDR_SCORE_HOA;
1050 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1051 score.rule = 4;
1052 goto record_it;
1053 }
1054 } else {
1055 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1056 continue;
1057 }
1058#else
220bbd74
YH		 1059 if (hiscore.rule < 4)
1060 hiscore.rule++;
3b9f9a1c 1061#endif
072047e4
YH		 1062
1063 /* Rule 5: Prefer outgoing interface */
1064 if (hiscore.rule < 5) {
1065 if (daddr_dev == NULL ||
1066 daddr_dev == ifa_result->idev->dev)
1067 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1068 hiscore.rule++;
1069 }
1070 if (daddr_dev == NULL ||
1071 daddr_dev == ifa->idev->dev) {
1072 score.attrs |= IPV6_SADDR_SCORE_OIF;
1073 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1074 score.rule = 5;
1075 goto record_it;
1076 }
1077 } else {
1078 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1079 continue;
1080 }
1081
1082 /* Rule 6: Prefer matching label */
1083 if (hiscore.rule < 6) {
c1ee656c 1084 if (ipv6_addr_label(&ifa_result->addr,
303065a8
YH		 1085 hiscore.addr_type,
1086 ifa_result->idev->dev->ifindex) == daddr_label)
072047e4
YH		 1087 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1088 hiscore.rule++;
1089 }
c1ee656c 1090 if (ipv6_addr_label(&ifa->addr,
303065a8
YH		 1091 score.addr_type,
1092 ifa->idev->dev->ifindex) == daddr_label) {
072047e4
YH		 1093 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1094 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1095 score.rule = 6;
1096 goto record_it;
1da177e4 1097 }
072047e4
YH		 1098 } else {
1099 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1100 continue;
1101 }
1102
44fd0261 1103#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1104 /* Rule 7: Prefer public address
1105 * Note: prefer temprary address if use_tempaddr >= 2
1106 */
1107 if (hiscore.rule < 7) {
1108 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1109 (ifa_result->idev->cnf.use_tempaddr >= 2))
1110 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1111 hiscore.rule++;
1112 }
1113 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1114 (ifa->idev->cnf.use_tempaddr >= 2)) {
1115 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1116 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1117 score.rule = 7;
1118 goto record_it;
1119 }
1120 } else {
1121 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1122 continue;
1123 }
5e2707fa
YH		 1124#else
1125 if (hiscore.rule < 7)
1126 hiscore.rule++;
44fd0261 1127#endif
072047e4 1128 /* Rule 8: Use longest matching prefix */
12da2a43 1129 if (hiscore.rule < 8) {
072047e4 1130 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1131 hiscore.rule++;
1132 }
072047e4
YH		 1133 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1134 if (score.matchlen > hiscore.matchlen) {
1135 score.rule = 8;
1136 goto record_it;
1da177e4 1137 }
072047e4
YH		 1138#if 0
1139 else if (score.matchlen < hiscore.matchlen)
1140 continue;
1141#endif
1142
1143 /* Final Rule: choose first available one */
1144 continue;
1145record_it:
1146 if (ifa_result)
1147 in6_ifa_put(ifa_result);
1148 in6_ifa_hold(ifa);
1149 ifa_result = ifa;
1150 hiscore = score;
1da177e4 1151 }
072047e4 1152 read_unlock_bh(&idev->lock);
1da177e4 1153 }
8814c4b5 1154 rcu_read_unlock();
1da177e4
LT		 1155 read_unlock(&dev_base_lock);
1156
072047e4
YH		 1157 if (!ifa_result)
1158 return -EADDRNOTAVAIL;
1ab1457c 1159
072047e4
YH		 1160 ipv6_addr_copy(saddr, &ifa_result->addr);
1161 in6_ifa_put(ifa_result);
1162 return 0;
1da177e4
LT		 1163}
1164
1165
1166int ipv6_get_saddr(struct dst_entry *dst,
1167 struct in6_addr *daddr, struct in6_addr *saddr)
1168{
7a3025b1 1169 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1da177e4
LT		 1170}
1171
7159039a 1172EXPORT_SYMBOL(ipv6_get_saddr);
1da177e4 1173
95c385b4
NH		 1174int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1175 unsigned char banned_flags)
1da177e4
LT		 1176{
1177 struct inet6_dev *idev;
1178 int err = -EADDRNOTAVAIL;
1179
8814c4b5 1180 rcu_read_lock();
1da177e4
LT		 1181 if ((idev = __in6_dev_get(dev)) != NULL) {
1182 struct inet6_ifaddr *ifp;
1183
1184 read_lock_bh(&idev->lock);
1185 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1186 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1187 ipv6_addr_copy(addr, &ifp->addr);
1188 err = 0;
1189 break;
1190 }
1191 }
1192 read_unlock_bh(&idev->lock);
1193 }
8814c4b5 1194 rcu_read_unlock();
1da177e4
LT		 1195 return err;
1196}
1197
1198static int ipv6_count_addresses(struct inet6_dev *idev)
1199{
1200 int cnt = 0;
1201 struct inet6_ifaddr *ifp;
1202
1203 read_lock_bh(&idev->lock);
1204 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1205 cnt++;
1206 read_unlock_bh(&idev->lock);
1207 return cnt;
1208}
1209
bfeade08
DL		 1210int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1211 struct net_device *dev, int strict)
1da177e4
LT		 1212{
1213 struct inet6_ifaddr * ifp;
1214 u8 hash = ipv6_addr_hash(addr);
1215
1216 read_lock_bh(&addrconf_hash_lock);
1217 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
bfeade08
DL		 1218 if (ifp->idev->dev->nd_net != net)
1219 continue;
1da177e4
LT		 1220 if (ipv6_addr_equal(&ifp->addr, addr) &&
1221 !(ifp->flags&IFA_F_TENTATIVE)) {
1222 if (dev == NULL || ifp->idev->dev == dev ||
1223 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1224 break;
1225 }
1226 }
1227 read_unlock_bh(&addrconf_hash_lock);
1228 return ifp != NULL;
1229}
7159039a
YH		 1230EXPORT_SYMBOL(ipv6_chk_addr);
1231
1da177e4 1232static
06bfe655
DL		 1233int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1234 struct net_device *dev)
1da177e4
LT		 1235{
1236 struct inet6_ifaddr * ifp;
1237 u8 hash = ipv6_addr_hash(addr);
1238
1239 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
06bfe655
DL		 1240 if (ifp->idev->dev->nd_net != net)
1241 continue;
1da177e4
LT		 1242 if (ipv6_addr_equal(&ifp->addr, addr)) {
1243 if (dev == NULL || ifp->idev->dev == dev)
1244 break;
1245 }
1246 }
1247 return ifp != NULL;
1248}
1249
1250struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1251{
1252 struct inet6_ifaddr * ifp;
1253 u8 hash = ipv6_addr_hash(addr);
1254
1255 read_lock_bh(&addrconf_hash_lock);
1256 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1257 if (ipv6_addr_equal(&ifp->addr, addr)) {
1258 if (dev == NULL || ifp->idev->dev == dev ||
1259 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1260 in6_ifa_hold(ifp);
1261 break;
1262 }
1263 }
1264 }
1265 read_unlock_bh(&addrconf_hash_lock);
1266
1267 return ifp;
1268}
1269
1270int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1271{
1272 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1273 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1274 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1275 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1276 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1277 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1278 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1279 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1280
1281 if (!sk2_rcv_saddr && !sk_ipv6only)
1282 return 1;
1283
1284 if (addr_type2 == IPV6_ADDR_ANY &&
1285 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1286 return 1;
1287
1288 if (addr_type == IPV6_ADDR_ANY &&
1289 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1290 return 1;
1291
1292 if (sk2_rcv_saddr6 &&
1293 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1294 return 1;
1295
1296 if (addr_type == IPV6_ADDR_MAPPED &&
1297 !sk2_ipv6only &&
1298 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1299 return 1;
1300
1301 return 0;
1302}
1303
1304/* Gets referenced address, destroys ifaddr */
1305
9f5336e2 1306static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1307{
1da177e4
LT		 1308 if (ifp->flags&IFA_F_PERMANENT) {
1309 spin_lock_bh(&ifp->lock);
1310 addrconf_del_timer(ifp);
1311 ifp->flags |= IFA_F_TENTATIVE;
1312 spin_unlock_bh(&ifp->lock);
1313 in6_ifa_put(ifp);
1314#ifdef CONFIG_IPV6_PRIVACY
1315 } else if (ifp->flags&IFA_F_TEMPORARY) {
1316 struct inet6_ifaddr *ifpub;
1317 spin_lock_bh(&ifp->lock);
1318 ifpub = ifp->ifpub;
1319 if (ifpub) {
1320 in6_ifa_hold(ifpub);
1321 spin_unlock_bh(&ifp->lock);
1322 ipv6_create_tempaddr(ifpub, ifp);
1323 in6_ifa_put(ifpub);
1324 } else {
1325 spin_unlock_bh(&ifp->lock);
1326 }
1327 ipv6_del_addr(ifp);
1328#endif
1329 } else
1330 ipv6_del_addr(ifp);
1331}
1332
3c21edbd
YH		 1333void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1334{
1335 if (net_ratelimit())
1336 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1337 addrconf_dad_stop(ifp);
1338}
1da177e4
LT		 1339
1340/* Join to solicited addr multicast group. */
1341
1342void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1343{
1344 struct in6_addr maddr;
1345
1346 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1347 return;
1348
1349 addrconf_addr_solict_mult(addr, &maddr);
1350 ipv6_dev_mc_inc(dev, &maddr);
1351}
1352
1353void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1354{
1355 struct in6_addr maddr;
1356
1357 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1358 return;
1359
1360 addrconf_addr_solict_mult(addr, &maddr);
1361 __ipv6_dev_mc_dec(idev, &maddr);
1362}
1363
20380731 1364static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1365{
1366 struct in6_addr addr;
1367 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1368 if (ipv6_addr_any(&addr))
1369 return;
1370 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1371}
1372
20380731 1373static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1374{
1375 struct in6_addr addr;
1376 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1377 if (ipv6_addr_any(&addr))
1378 return;
1379 __ipv6_dev_ac_dec(ifp->idev, &addr);
1380}
1381
073a8e0e
YH		 1382static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1383{
1384 if (dev->addr_len != ETH_ALEN)
1385 return -1;
1386 memcpy(eui, dev->dev_addr, 3);
1387 memcpy(eui + 5, dev->dev_addr + 3, 3);
1388
1389 /*
1390 * The zSeries OSA network cards can be shared among various
1391 * OS instances, but the OSA cards have only one MAC address.
1392 * This leads to duplicate address conflicts in conjunction
1393 * with IPv6 if more than one instance uses the same card.
1394 *
1395 * The driver for these cards can deliver a unique 16-bit
1396 * identifier for each instance sharing the same card. It is
1397 * placed instead of 0xFFFE in the interface identifier. The
1398 * "u" bit of the interface identifier is not inverted in this
1399 * case. Hence the resulting interface identifier has local
1400 * scope according to RFC2373.
1401 */
1402 if (dev->dev_id) {
1403 eui[3] = (dev->dev_id >> 8) & 0xFF;
1404 eui[4] = dev->dev_id & 0xFF;
1405 } else {
1406 eui[3] = 0xFF;
1407 eui[4] = 0xFE;
1408 eui[0] ^= 2;
1409 }
1410 return 0;
1411}
1412
1413static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1414{
1415 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1416 if (dev->addr_len != ARCNET_ALEN)
1417 return -1;
1418 memset(eui, 0, 7);
1419 eui[7] = *(u8*)dev->dev_addr;
1420 return 0;
1421}
1422
1423static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1424{
1425 if (dev->addr_len != INFINIBAND_ALEN)
1426 return -1;
1427 memcpy(eui, dev->dev_addr + 12, 8);
1428 eui[0] |= 2;
1429 return 0;
1430}
1431
1da177e4
LT		 1432static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1433{
1434 switch (dev->type) {
1435 case ARPHRD_ETHER:
1436 case ARPHRD_FDDI:
1437 case ARPHRD_IEEE802_TR:
073a8e0e 1438 return addrconf_ifid_eui48(eui, dev);
1da177e4 1439 case ARPHRD_ARCNET:
073a8e0e 1440 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1441 case ARPHRD_INFINIBAND:
073a8e0e 1442 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0
FT		 1443 case ARPHRD_SIT:
1444 if (dev->priv_flags & IFF_ISATAP)
1445 return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr);
1da177e4
LT		 1446 }
1447 return -1;
1448}
1449
1450static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1451{
1452 int err = -1;
1453 struct inet6_ifaddr *ifp;
1454
1455 read_lock_bh(&idev->lock);
1456 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1457 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1458 memcpy(eui, ifp->addr.s6_addr+8, 8);
1459 err = 0;
1460 break;
1461 }
1462 }
1463 read_unlock_bh(&idev->lock);
1464 return err;
1465}
1466
1467#ifdef CONFIG_IPV6_PRIVACY
1468/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1469static int __ipv6_regen_rndid(struct inet6_dev *idev)
1470{
1da177e4 1471regen:
955189ef 1472 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1473 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1474
1475 /*
1476 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1477 * check if generated address is not inappropriate
1478 *
1479 * - Reserved subnet anycast (RFC 2526)
1480 * 11111101 11....11 1xxxxxxx
c7dc89c0 1481 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1482 * 00-00-5E-FE-xx-xx-xx-xx
1483 * - value 0
1484 * - XXX: already assigned to an address on the device
1485 */
1ab1457c 1486 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1487 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1488 (idev->rndid[7]&0x80))
1489 goto regen;
1490 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1491 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1492 goto regen;
1493 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1494 goto regen;
1495 }
1496
1497 return 0;
1498}
1499
1500static void ipv6_regen_rndid(unsigned long data)
1501{
1502 struct inet6_dev *idev = (struct inet6_dev *) data;
1503 unsigned long expires;
1504
8814c4b5 1505 rcu_read_lock_bh();
1da177e4
LT		 1506 write_lock_bh(&idev->lock);
1507
1508 if (idev->dead)
1509 goto out;
1510
1511 if (__ipv6_regen_rndid(idev) < 0)
1512 goto out;
1ab1457c 1513
1da177e4 1514 expires = jiffies +
1ab1457c 1515 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1516 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1517 if (time_before(expires, jiffies)) {
1518 printk(KERN_WARNING
1519 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1520 idev->dev->name);
1521 goto out;
1522 }
1523
1524 if (!mod_timer(&idev->regen_timer, expires))
1525 in6_dev_hold(idev);
1526
1527out:
1528 write_unlock_bh(&idev->lock);
8814c4b5 1529 rcu_read_unlock_bh();
1da177e4
LT		 1530 in6_dev_put(idev);
1531}
1532
1533static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1534 int ret = 0;
1535
1536 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1537 ret = __ipv6_regen_rndid(idev);
1538 return ret;
1539}
1540#endif
1541
1542/*
1543 * Add prefix route.
1544 */
1545
1546static void
1547addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1548 unsigned long expires, u32 flags)
1da177e4 1549{
86872cb5
TG		 1550 struct fib6_config cfg = {
1551 .fc_table = RT6_TABLE_PREFIX,
1552 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1553 .fc_ifindex = dev->ifindex,
1554 .fc_expires = expires,
1555 .fc_dst_len = plen,
1556 .fc_flags = RTF_UP | flags,
1557 };
1da177e4 1558
86872cb5 1559 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1560
1561 /* Prevent useless cloning on PtP SIT.
1562 This thing is done here expecting that the whole
1563 class of non-broadcast devices need not cloning.
1564 */
0be669bb 1565#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1566 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1567 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1568#endif
1da177e4 1569
86872cb5 1570 ip6_route_add(&cfg);
1da177e4
LT		 1571}
1572
1573/* Create "default" multicast route to the interface */
1574
1575static void addrconf_add_mroute(struct net_device *dev)
1576{
86872cb5
TG		 1577 struct fib6_config cfg = {
1578 .fc_table = RT6_TABLE_LOCAL,
1579 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1580 .fc_ifindex = dev->ifindex,
1581 .fc_dst_len = 8,
1582 .fc_flags = RTF_UP,
1583 };
1584
1585 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1586
1587 ip6_route_add(&cfg);
1da177e4
LT		 1588}
1589
0be669bb 1590#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1591static void sit_route_add(struct net_device *dev)
1592{
86872cb5
TG		 1593 struct fib6_config cfg = {
1594 .fc_table = RT6_TABLE_MAIN,
1595 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1596 .fc_ifindex = dev->ifindex,
1597 .fc_dst_len = 96,
1598 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1599 };
1da177e4
LT		 1600
1601 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1602 ip6_route_add(&cfg);
1da177e4 1603}
0be669bb 1604#endif
1da177e4
LT		 1605
1606static void addrconf_add_lroute(struct net_device *dev)
1607{
1608 struct in6_addr addr;
1609
1610 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1611 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1612}
1613
1614static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1615{
1616 struct inet6_dev *idev;
1617
1618 ASSERT_RTNL();
1619
1620 if ((idev = ipv6_find_idev(dev)) == NULL)
1621 return NULL;
1622
1623 /* Add default multicast route */
1624 addrconf_add_mroute(dev);
1625
1626 /* Add link local route */
1627 addrconf_add_lroute(dev);
1628 return idev;
1629}
1630
1631void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1632{
1633 struct prefix_info *pinfo;
1634 __u32 valid_lft;
1635 __u32 prefered_lft;
1636 int addr_type;
1637 unsigned long rt_expires;
1638 struct inet6_dev *in6_dev;
1639
1640 pinfo = (struct prefix_info *) opt;
1ab1457c 1641
1da177e4
LT		 1642 if (len < sizeof(struct prefix_info)) {
1643 ADBG(("addrconf: prefix option too short\n"));
1644 return;
1645 }
1ab1457c 1646
1da177e4
LT		 1647 /*
1648 * Validation checks ([ADDRCONF], page 19)
1649 */
1650
1651 addr_type = ipv6_addr_type(&pinfo->prefix);
1652
1653 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1654 return;
1655
1656 valid_lft = ntohl(pinfo->valid);
1657 prefered_lft = ntohl(pinfo->prefered);
1658
1659 if (prefered_lft > valid_lft) {
1660 if (net_ratelimit())
1661 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1662 return;
1663 }
1664
1665 in6_dev = in6_dev_get(dev);
1666
1667 if (in6_dev == NULL) {
1668 if (net_ratelimit())
1669 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1670 return;
1671 }
1672
1673 /*
1674 * Two things going on here:
1675 * 1) Add routes for on-link prefixes
1676 * 2) Configure prefixes with the auto flag set
1677 */
1678
1679 /* Avoid arithmetic overflow. Really, we could
1680 save rt_expires in seconds, likely valid_lft,
1681 but it would require division in fib gc, that it
1682 not good.
1683 */
1684 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1685 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1686 else
3dd4bc68
YH		 1687 rt_expires = valid_lft * HZ;
1688
1689 /*
1690 * We convert this (in jiffies) to clock_t later.
1691 * Avoid arithmetic overflow there as well.
1692 * Overflow can happen only if HZ < USER_HZ.
1693 */
1694 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1695 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1696
1697 if (pinfo->onlink) {
1698 struct rt6_info *rt;
1699 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1700
1701 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1702 if (rt->rt6i_flags&RTF_EXPIRES) {
1703 if (valid_lft == 0) {
e0a1ad73 1704 ip6_del_rt(rt);
1da177e4
LT		 1705 rt = NULL;
1706 } else {
3dd4bc68 1707 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1708 }
1709 }
1710 } else if (valid_lft) {
1711 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1712 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1713 }
1714 if (rt)
1715 dst_release(&rt->u.dst);
1716 }
1717
1718 /* Try to figure out our local address for this prefix */
1719
1720 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1721 struct inet6_ifaddr * ifp;
1722 struct in6_addr addr;
1723 int create = 0, update_lft = 0;
1724
1725 if (pinfo->prefix_len == 64) {
1726 memcpy(&addr, &pinfo->prefix, 8);
1727 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1728 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1729 in6_dev_put(in6_dev);
1730 return;
1731 }
1732 goto ok;
1733 }
1734 if (net_ratelimit())
1735 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1736 pinfo->prefix_len);
1737 in6_dev_put(in6_dev);
1738 return;
1739
1740ok:
1741
1742 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1743
1744 if (ifp == NULL && valid_lft) {
1745 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1746 u32 addr_flags = 0;
1747
1748#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1749 if (in6_dev->cnf.optimistic_dad &&
1750 !ipv6_devconf.forwarding)
1751 addr_flags = IFA_F_OPTIMISTIC;
1752#endif
1da177e4
LT		 1753
1754 /* Do not allow to create too much of autoconfigured
1755 * addresses; this would be too easy way to crash kernel.
1756 */
1757 if (!max_addresses ||
1758 ipv6_count_addresses(in6_dev) < max_addresses)
1759 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1760 addr_type&IPV6_ADDR_SCOPE_MASK,
1761 addr_flags);
1da177e4
LT		 1762
1763 if (!ifp || IS_ERR(ifp)) {
1764 in6_dev_put(in6_dev);
1765 return;
1766 }
1767
1768 update_lft = create = 1;
1769 ifp->cstamp = jiffies;
1770 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1771 }
1772
1773 if (ifp) {
1774 int flags;
1775 unsigned long now;
1776#ifdef CONFIG_IPV6_PRIVACY
1777 struct inet6_ifaddr *ift;
1778#endif
1779 u32 stored_lft;
1780
1781 /* update lifetime (RFC2462 5.5.3 e) */
1782 spin_lock(&ifp->lock);
1783 now = jiffies;
1784 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1785 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1786 else
1787 stored_lft = 0;
1788 if (!update_lft && stored_lft) {
1789 if (valid_lft > MIN_VALID_LIFETIME ||
1790 valid_lft > stored_lft)
1791 update_lft = 1;
1792 else if (stored_lft <= MIN_VALID_LIFETIME) {
1793 /* valid_lft <= stored_lft is always true */
1794 /* XXX: IPsec */
1795 update_lft = 0;
1796 } else {
1797 valid_lft = MIN_VALID_LIFETIME;
1798 if (valid_lft < prefered_lft)
1799 prefered_lft = valid_lft;
1800 update_lft = 1;
1801 }
1802 }
1803
1804 if (update_lft) {
1805 ifp->valid_lft = valid_lft;
1806 ifp->prefered_lft = prefered_lft;
1807 ifp->tstamp = now;
1808 flags = ifp->flags;
1809 ifp->flags &= ~IFA_F_DEPRECATED;
1810 spin_unlock(&ifp->lock);
1811
1812 if (!(flags&IFA_F_TENTATIVE))
1813 ipv6_ifa_notify(0, ifp);
1814 } else
1815 spin_unlock(&ifp->lock);
1816
1817#ifdef CONFIG_IPV6_PRIVACY
1818 read_lock_bh(&in6_dev->lock);
1819 /* update all temporary addresses in the list */
1820 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1821 /*
1822 * When adjusting the lifetimes of an existing
1823 * temporary address, only lower the lifetimes.
1824 * Implementations must not increase the
1825 * lifetimes of an existing temporary address
1826 * when processing a Prefix Information Option.
1827 */
1828 spin_lock(&ift->lock);
1829 flags = ift->flags;
1830 if (ift->valid_lft > valid_lft &&
1831 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1832 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1833 if (ift->prefered_lft > prefered_lft &&
1834 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1835 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1836 spin_unlock(&ift->lock);
1837 if (!(flags&IFA_F_TENTATIVE))
1838 ipv6_ifa_notify(0, ift);
1839 }
1840
1841 if (create && in6_dev->cnf.use_tempaddr > 0) {
1842 /*
1843 * When a new public address is created as described in [ADDRCONF],
1844 * also create a new temporary address.
1845 */
1ab1457c 1846 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1847 ipv6_create_tempaddr(ifp, NULL);
1848 } else {
1849 read_unlock_bh(&in6_dev->lock);
1850 }
1851#endif
1852 in6_ifa_put(ifp);
1853 addrconf_verify(0);
1854 }
1855 }
1856 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1857 in6_dev_put(in6_dev);
1858}
1859
1860/*
1861 * Set destination address.
1862 * Special case for SIT interfaces where we create a new "virtual"
1863 * device.
1864 */
1865int addrconf_set_dstaddr(void __user *arg)
1866{
1867 struct in6_ifreq ireq;
1868 struct net_device *dev;
1869 int err = -EINVAL;
1870
1871 rtnl_lock();
1872
1873 err = -EFAULT;
1874 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1875 goto err_exit;
1876
881d966b 1877 dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex);
1da177e4
LT		 1878
1879 err = -ENODEV;
1880 if (dev == NULL)
1881 goto err_exit;
1882
0be669bb 1883#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1884 if (dev->type == ARPHRD_SIT) {
1885 struct ifreq ifr;
1886 mm_segment_t oldfs;
1887 struct ip_tunnel_parm p;
1888
1889 err = -EADDRNOTAVAIL;
1890 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1891 goto err_exit;
1892
1893 memset(&p, 0, sizeof(p));
1894 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1895 p.iph.saddr = 0;
1896 p.iph.version = 4;
1897 p.iph.ihl = 5;
1898 p.iph.protocol = IPPROTO_IPV6;
1899 p.iph.ttl = 64;
1900 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1901
1902 oldfs = get_fs(); set_fs(KERNEL_DS);
1903 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1904 set_fs(oldfs);
1905
1906 if (err == 0) {
1907 err = -ENOBUFS;
881d966b 1908 if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL)
1da177e4
LT		 1909 goto err_exit;
1910 err = dev_open(dev);
1911 }
1912 }
0be669bb 1913#endif
1da177e4
LT		 1914
1915err_exit:
1916 rtnl_unlock();
1917 return err;
1918}
1919
1920/*
1921 * Manual configuration of address on an interface
1922 */
0778769d 1923static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
55ebaef1 1924 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1da177e4
LT		 1925{
1926 struct inet6_ifaddr *ifp;
1927 struct inet6_dev *idev;
1928 struct net_device *dev;
1929 int scope;
46d48046 1930 u32 flags = RTF_EXPIRES;
1da177e4
LT		 1931
1932 ASSERT_RTNL();
1ab1457c 1933
0778769d
NT		 1934 /* check the lifetime */
1935 if (!valid_lft || prefered_lft > valid_lft)
1936 return -EINVAL;
1937
881d966b 1938 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4 1939 return -ENODEV;
1ab1457c 1940
1da177e4
LT		 1941 if ((idev = addrconf_add_dev(dev)) == NULL)
1942 return -ENOBUFS;
1943
1944 scope = ipv6_addr_scope(pfx);
1945
46d48046 1946 if (valid_lft == INFINITY_LIFE_TIME) {
0778769d 1947 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 1948 flags = 0;
1949 } else if (valid_lft >= 0x7FFFFFFF/HZ)
0778769d
NT		 1950 valid_lft = 0x7FFFFFFF/HZ;
1951
1952 if (prefered_lft == 0)
1953 ifa_flags |= IFA_F_DEPRECATED;
1954 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1955 (prefered_lft != INFINITY_LIFE_TIME))
1956 prefered_lft = 0x7FFFFFFF/HZ;
1957
1958 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1959
1da177e4 1960 if (!IS_ERR(ifp)) {
06aebfb7 1961 spin_lock_bh(&ifp->lock);
0778769d
NT		 1962 ifp->valid_lft = valid_lft;
1963 ifp->prefered_lft = prefered_lft;
1964 ifp->tstamp = jiffies;
06aebfb7 1965 spin_unlock_bh(&ifp->lock);
0778769d 1966
46d48046
YH		 1967 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1968 jiffies_to_clock_t(valid_lft * HZ), flags);
95c385b4
NH		 1969 /*
1970 * Note that section 3.1 of RFC 4429 indicates
1971 * that the Optimistic flag should not be set for
1972 * manually configured addresses
1973 */
1da177e4
LT		 1974 addrconf_dad_start(ifp, 0);
1975 in6_ifa_put(ifp);
0778769d 1976 addrconf_verify(0);
1da177e4
LT		 1977 return 0;
1978 }
1979
1980 return PTR_ERR(ifp);
1981}
1982
1983static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1984{
1985 struct inet6_ifaddr *ifp;
1986 struct inet6_dev *idev;
1987 struct net_device *dev;
1ab1457c 1988
881d966b 1989 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4
LT		 1990 return -ENODEV;
1991
1992 if ((idev = __in6_dev_get(dev)) == NULL)
1993 return -ENXIO;
1994
1995 read_lock_bh(&idev->lock);
1996 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1997 if (ifp->prefix_len == plen &&
1998 ipv6_addr_equal(pfx, &ifp->addr)) {
1999 in6_ifa_hold(ifp);
2000 read_unlock_bh(&idev->lock);
1ab1457c 2001
1da177e4
LT		 2002 ipv6_del_addr(ifp);
2003
2004 /* If the last address is deleted administratively,
2005 disable IPv6 on this interface.
2006 */
2007 if (idev->addr_list == NULL)
2008 addrconf_ifdown(idev->dev, 1);
2009 return 0;
2010 }
2011 }
2012 read_unlock_bh(&idev->lock);
2013 return -EADDRNOTAVAIL;
2014}
2015
2016
2017int addrconf_add_ifaddr(void __user *arg)
2018{
2019 struct in6_ifreq ireq;
2020 int err;
1ab1457c 2021
1da177e4
LT		 2022 if (!capable(CAP_NET_ADMIN))
2023 return -EPERM;
1ab1457c 2024
1da177e4
LT		 2025 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2026 return -EFAULT;
2027
2028 rtnl_lock();
0778769d 2029 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
55ebaef1 2030 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2031 rtnl_unlock();
2032 return err;
2033}
2034
2035int addrconf_del_ifaddr(void __user *arg)
2036{
2037 struct in6_ifreq ireq;
2038 int err;
1ab1457c 2039
1da177e4
LT		 2040 if (!capable(CAP_NET_ADMIN))
2041 return -EPERM;
2042
2043 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2044 return -EFAULT;
2045
2046 rtnl_lock();
2047 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2048 rtnl_unlock();
2049 return err;
2050}
2051
0be669bb 2052#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2053static void sit_add_v4_addrs(struct inet6_dev *idev)
2054{
2055 struct inet6_ifaddr * ifp;
2056 struct in6_addr addr;
2057 struct net_device *dev;
2058 int scope;
2059
2060 ASSERT_RTNL();
2061
2062 memset(&addr, 0, sizeof(struct in6_addr));
2063 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2064
2065 if (idev->dev->flags&IFF_POINTOPOINT) {
2066 addr.s6_addr32[0] = htonl(0xfe800000);
2067 scope = IFA_LINK;
2068 } else {
2069 scope = IPV6_ADDR_COMPATv4;
2070 }
2071
2072 if (addr.s6_addr32[3]) {
2073 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2074 if (!IS_ERR(ifp)) {
2075 spin_lock_bh(&ifp->lock);
2076 ifp->flags &= ~IFA_F_TENTATIVE;
2077 spin_unlock_bh(&ifp->lock);
2078 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2079 in6_ifa_put(ifp);
2080 }
2081 return;
2082 }
2083
881d966b 2084 for_each_netdev(&init_net, dev) {
e5ed6399 2085 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2086 if (in_dev && (dev->flags & IFF_UP)) {
2087 struct in_ifaddr * ifa;
2088
2089 int flag = scope;
2090
2091 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2092 int plen;
2093
2094 addr.s6_addr32[3] = ifa->ifa_local;
2095
2096 if (ifa->ifa_scope == RT_SCOPE_LINK)
2097 continue;
2098 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2099 if (idev->dev->flags&IFF_POINTOPOINT)
2100 continue;
2101 flag |= IFA_HOST;
2102 }
2103 if (idev->dev->flags&IFF_POINTOPOINT)
2104 plen = 64;
2105 else
2106 plen = 96;
2107
2108 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2109 IFA_F_PERMANENT);
2110 if (!IS_ERR(ifp)) {
2111 spin_lock_bh(&ifp->lock);
2112 ifp->flags &= ~IFA_F_TENTATIVE;
2113 spin_unlock_bh(&ifp->lock);
2114 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2115 in6_ifa_put(ifp);
2116 }
2117 }
2118 }
1ab1457c 2119 }
1da177e4 2120}
0be669bb 2121#endif
1da177e4
LT		 2122
2123static void init_loopback(struct net_device *dev)
2124{
2125 struct inet6_dev *idev;
2126 struct inet6_ifaddr * ifp;
2127
2128 /* ::1 */
2129
2130 ASSERT_RTNL();
2131
2132 if ((idev = ipv6_find_idev(dev)) == NULL) {
2133 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2134 return;
2135 }
2136
2137 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2138 if (!IS_ERR(ifp)) {
2139 spin_lock_bh(&ifp->lock);
2140 ifp->flags &= ~IFA_F_TENTATIVE;
2141 spin_unlock_bh(&ifp->lock);
2142 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2143 in6_ifa_put(ifp);
2144 }
2145}
2146
2147static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2148{
2149 struct inet6_ifaddr * ifp;
95c385b4
NH		 2150 u32 addr_flags = IFA_F_PERMANENT;
2151
2152#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2153 if (idev->cnf.optimistic_dad &&
2154 !ipv6_devconf.forwarding)
2155 addr_flags |= IFA_F_OPTIMISTIC;
2156#endif
1da177e4 2157
95c385b4
NH		 2158
2159 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2160 if (!IS_ERR(ifp)) {
46d48046 2161 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2162 addrconf_dad_start(ifp, 0);
2163 in6_ifa_put(ifp);
2164 }
2165}
2166
2167static void addrconf_dev_config(struct net_device *dev)
2168{
2169 struct in6_addr addr;
2170 struct inet6_dev * idev;
2171
2172 ASSERT_RTNL();
2173
74235a25
HX		 2174 if ((dev->type != ARPHRD_ETHER) &&
2175 (dev->type != ARPHRD_FDDI) &&
2176 (dev->type != ARPHRD_IEEE802_TR) &&
2177 (dev->type != ARPHRD_ARCNET) &&
2178 (dev->type != ARPHRD_INFINIBAND)) {
2179 /* Alas, we support only Ethernet autoconfiguration. */
2180 return;
2181 }
2182
1da177e4
LT		 2183 idev = addrconf_add_dev(dev);
2184 if (idev == NULL)
2185 return;
2186
2187 memset(&addr, 0, sizeof(struct in6_addr));
2188 addr.s6_addr32[0] = htonl(0xFE800000);
2189
2190 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2191 addrconf_add_linklocal(idev, &addr);
2192}
2193
0be669bb 2194#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2195static void addrconf_sit_config(struct net_device *dev)
2196{
2197 struct inet6_dev *idev;
2198
2199 ASSERT_RTNL();
2200
1ab1457c
YH		 2201 /*
2202 * Configure the tunnel with one of our IPv4
2203 * addresses... we should configure all of
1da177e4
LT		 2204 * our v4 addrs in the tunnel
2205 */
2206
2207 if ((idev = ipv6_find_idev(dev)) == NULL) {
2208 printk(KERN_DEBUG "init sit: add_dev failed\n");
2209 return;
2210 }
2211
c7dc89c0
FT		 2212 if (dev->priv_flags & IFF_ISATAP) {
2213 struct in6_addr addr;
2214
2215 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2216 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2217 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2218 addrconf_add_linklocal(idev, &addr);
2219 return;
2220 }
2221
1da177e4
LT		 2222 sit_add_v4_addrs(idev);
2223
2224 if (dev->flags&IFF_POINTOPOINT) {
2225 addrconf_add_mroute(dev);
2226 addrconf_add_lroute(dev);
2227 } else
2228 sit_route_add(dev);
2229}
0be669bb 2230#endif
1da177e4
LT		 2231
2232static inline int
2233ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2234{
2235 struct in6_addr lladdr;
2236
95c385b4 2237 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2238 addrconf_add_linklocal(idev, &lladdr);
2239 return 0;
2240 }
2241 return -1;
2242}
2243
2244static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2245{
2246 struct net_device *link_dev;
2247
2248 /* first try to inherit the link-local address from the link device */
2249 if (idev->dev->iflink &&
881d966b 2250 (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) {
1da177e4
LT		 2251 if (!ipv6_inherit_linklocal(idev, link_dev))
2252 return;
2253 }
2254 /* then try to inherit it from any device */
881d966b 2255 for_each_netdev(&init_net, link_dev) {
1da177e4
LT		 2256 if (!ipv6_inherit_linklocal(idev, link_dev))
2257 return;
2258 }
2259 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2260}
2261
2262/*
2263 * Autoconfigure tunnel with a link-local address so routing protocols,
2264 * DHCPv6, MLD etc. can be run over the virtual link
2265 */
2266
2267static void addrconf_ip6_tnl_config(struct net_device *dev)
2268{
2269 struct inet6_dev *idev;
2270
2271 ASSERT_RTNL();
2272
2273 if ((idev = addrconf_add_dev(dev)) == NULL) {
2274 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2275 return;
2276 }
2277 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2278}
2279
1ab1457c 2280static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2281 void * data)
2282{
2283 struct net_device *dev = (struct net_device *) data;
74235a25 2284 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2285 int run_pending = 0;
b217d616 2286 int err;
1da177e4 2287
e9dc8653
EB		 2288 if (dev->nd_net != &init_net)
2289 return NOTIFY_DONE;
2290
1da177e4 2291 switch(event) {
45ba9dd2 2292 case NETDEV_REGISTER:
74235a25 2293 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2294 idev = ipv6_add_dev(dev);
2295 if (!idev)
b217d616 2296 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2297 }
2298 break;
1da177e4 2299 case NETDEV_UP:
3c21edbd 2300 case NETDEV_CHANGE:
c2edacf8
JV		 2301 if (dev->flags & IFF_SLAVE)
2302 break;
2303
3c21edbd 2304 if (event == NETDEV_UP) {
f24e3d65 2305 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2306 /* device is not ready yet. */
2307 printk(KERN_INFO
2308 "ADDRCONF(NETDEV_UP): %s: "
2309 "link is not ready\n",
2310 dev->name);
2311 break;
2312 }
99081049 2313
d31c7b8f
EP		 2314 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2315 idev = ipv6_add_dev(dev);
2316
99081049
KS		 2317 if (idev)
2318 idev->if_flags |= IF_READY;
3c21edbd 2319 } else {
f24e3d65 2320 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2321 /* device is still not ready. */
2322 break;
2323 }
2324
2325 if (idev) {
2326 if (idev->if_flags & IF_READY) {
2327 /* device is already configured. */
2328 break;
2329 }
2330 idev->if_flags |= IF_READY;
2331 }
2332
2333 printk(KERN_INFO
2334 "ADDRCONF(NETDEV_CHANGE): %s: "
2335 "link becomes ready\n",
2336 dev->name);
2337
c5e33bdd 2338 run_pending = 1;
3c21edbd
YH		 2339 }
2340
1da177e4 2341 switch(dev->type) {
0be669bb 2342#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2343 case ARPHRD_SIT:
2344 addrconf_sit_config(dev);
2345 break;
0be669bb 2346#endif
1da177e4
LT		 2347 case ARPHRD_TUNNEL6:
2348 addrconf_ip6_tnl_config(dev);
2349 break;
2350 case ARPHRD_LOOPBACK:
2351 init_loopback(dev);
2352 break;
2353
2354 default:
2355 addrconf_dev_config(dev);
2356 break;
3ff50b79 2357 }
1da177e4 2358 if (idev) {
c5e33bdd
YH		 2359 if (run_pending)
2360 addrconf_dad_run(idev);
2361
1da177e4
LT		 2362 /* If the MTU changed during the interface down, when the
2363 interface up, the changed MTU must be reflected in the
2364 idev as well as routers.
2365 */
2366 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2367 rt6_mtu_change(dev, dev->mtu);
2368 idev->cnf.mtu6 = dev->mtu;
2369 }
2370 idev->tstamp = jiffies;
2371 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2372 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2373 stop IPv6 on this interface.
2374 */
2375 if (dev->mtu < IPV6_MIN_MTU)
2376 addrconf_ifdown(dev, event != NETDEV_DOWN);
2377 }
2378 break;
2379
2380 case NETDEV_CHANGEMTU:
d31c7b8f 2381 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2382 rt6_mtu_change(dev, dev->mtu);
2383 idev->cnf.mtu6 = dev->mtu;
2384 break;
2385 }
2386
d31c7b8f
EP		 2387 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2388 idev = ipv6_add_dev(dev);
2389 if (idev)
2390 break;
2391 }
2392
1da177e4
LT		 2393 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2394
2395 case NETDEV_DOWN:
2396 case NETDEV_UNREGISTER:
2397 /*
2398 * Remove all addresses from this interface.
2399 */
2400 addrconf_ifdown(dev, event != NETDEV_DOWN);
2401 break;
3c21edbd 2402
1da177e4 2403 case NETDEV_CHANGENAME:
1da177e4 2404 if (idev) {
5632c515 2405 snmp6_unregister_dev(idev);
408c4768 2406 addrconf_sysctl_unregister(idev);
f52295a9 2407 addrconf_sysctl_register(idev);
b217d616
HX		 2408 err = snmp6_register_dev(idev);
2409 if (err)
2410 return notifier_from_errno(err);
5632c515 2411 }
1da177e4 2412 break;
3ff50b79 2413 }
1da177e4
LT		 2414
2415 return NOTIFY_OK;
2416}
2417
2418/*
2419 * addrconf module should be notified of a device going up
2420 */
2421static struct notifier_block ipv6_dev_notf = {
2422 .notifier_call = addrconf_notify,
2423 .priority = 0
2424};
2425
2426static int addrconf_ifdown(struct net_device *dev, int how)
2427{
2428 struct inet6_dev *idev;
2429 struct inet6_ifaddr *ifa, **bifa;
2430 int i;
2431
2432 ASSERT_RTNL();
2433
2774c7ab 2434 if (dev == init_net.loopback_dev && how == 1)
1da177e4
LT		 2435 how = 0;
2436
2437 rt6_ifdown(dev);
2438 neigh_ifdown(&nd_tbl, dev);
2439
2440 idev = __in6_dev_get(dev);
2441 if (idev == NULL)
2442 return -ENODEV;
2443
2444 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2445 Do not dev_put!
1da177e4
LT		 2446 */
2447 if (how == 1) {
1da177e4 2448 idev->dead = 1;
8814c4b5
YH		 2449
2450 /* protected by rtnl_lock */
2451 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2452
2453 /* Step 1.5: remove snmp6 entry */
2454 snmp6_unregister_dev(idev);
2455
2456 }
2457
2458 /* Step 2: clear hash table */
2459 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2460 bifa = &inet6_addr_lst[i];
2461
2462 write_lock_bh(&addrconf_hash_lock);
2463 while ((ifa = *bifa) != NULL) {
2464 if (ifa->idev == idev) {
2465 *bifa = ifa->lst_next;
2466 ifa->lst_next = NULL;
2467 addrconf_del_timer(ifa);
2468 in6_ifa_put(ifa);
2469 continue;
2470 }
2471 bifa = &ifa->lst_next;
2472 }
2473 write_unlock_bh(&addrconf_hash_lock);
2474 }
2475
2476 write_lock_bh(&idev->lock);
2477
2478 /* Step 3: clear flags for stateless addrconf */
2479 if (how != 1)
3c21edbd 2480 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2481
2482 /* Step 4: clear address list */
2483#ifdef CONFIG_IPV6_PRIVACY
2484 if (how == 1 && del_timer(&idev->regen_timer))
2485 in6_dev_put(idev);
2486
2487 /* clear tempaddr list */
2488 while ((ifa = idev->tempaddr_list) != NULL) {
2489 idev->tempaddr_list = ifa->tmp_next;
2490 ifa->tmp_next = NULL;
2491 ifa->dead = 1;
2492 write_unlock_bh(&idev->lock);
2493 spin_lock_bh(&ifa->lock);
2494
2495 if (ifa->ifpub) {
2496 in6_ifa_put(ifa->ifpub);
2497 ifa->ifpub = NULL;
2498 }
2499 spin_unlock_bh(&ifa->lock);
2500 in6_ifa_put(ifa);
2501 write_lock_bh(&idev->lock);
2502 }
2503#endif
2504 while ((ifa = idev->addr_list) != NULL) {
2505 idev->addr_list = ifa->if_next;
2506 ifa->if_next = NULL;
2507 ifa->dead = 1;
2508 addrconf_del_timer(ifa);
2509 write_unlock_bh(&idev->lock);
2510
2511 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2512 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2513 in6_ifa_put(ifa);
2514
2515 write_lock_bh(&idev->lock);
2516 }
2517 write_unlock_bh(&idev->lock);
2518
2519 /* Step 5: Discard multicast list */
2520
2521 if (how == 1)
2522 ipv6_mc_destroy_dev(idev);
2523 else
2524 ipv6_mc_down(idev);
2525
1da177e4 2526 idev->tstamp = jiffies;
1ab1457c 2527
1da177e4
LT		 2528 /* Shot the device (if unregistered) */
2529
2530 if (how == 1) {
408c4768 2531 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2532 neigh_parms_release(&nd_tbl, idev->nd_parms);
2533 neigh_ifdown(&nd_tbl, dev);
2534 in6_dev_put(idev);
2535 }
2536 return 0;
2537}
2538
2539static void addrconf_rs_timer(unsigned long data)
2540{
2541 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2542
2543 if (ifp->idev->cnf.forwarding)
2544 goto out;
2545
2546 if (ifp->idev->if_flags & IF_RA_RCVD) {
2547 /*
2548 * Announcement received after solicitation
2549 * was sent
2550 */
2551 goto out;
2552 }
2553
2554 spin_lock(&ifp->lock);
2555 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2556 struct in6_addr all_routers;
2557
2558 /* The wait after the last probe can be shorter */
2559 addrconf_mod_timer(ifp, AC_RS,
2560 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2561 ifp->idev->cnf.rtr_solicit_delay :
2562 ifp->idev->cnf.rtr_solicit_interval);
2563 spin_unlock(&ifp->lock);
2564
2565 ipv6_addr_all_routers(&all_routers);
2566
2567 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2568 } else {
2569 spin_unlock(&ifp->lock);
2570 /*
2571 * Note: we do not support deprecated "all on-link"
2572 * assumption any longer.
2573 */
2574 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2575 ifp->idev->dev->name);
2576 }
2577
2578out:
2579 in6_ifa_put(ifp);
2580}
2581
2582/*
2583 * Duplicate Address Detection
2584 */
3c21edbd
YH		 2585static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2586{
2587 unsigned long rand_num;
2588 struct inet6_dev *idev = ifp->idev;
2589
95c385b4
NH		 2590 if (ifp->flags & IFA_F_OPTIMISTIC)
2591 rand_num = 0;
2592 else
2593 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2594
3c21edbd
YH		 2595 ifp->probes = idev->cnf.dad_transmits;
2596 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2597}
2598
e431b8c0 2599static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2600{
2601 struct inet6_dev *idev = ifp->idev;
2602 struct net_device *dev = idev->dev;
1da177e4
LT		 2603
2604 addrconf_join_solict(dev, &ifp->addr);
2605
1da177e4 2606 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2607
2608 read_lock_bh(&idev->lock);
2609 if (ifp->dead)
2610 goto out;
2611 spin_lock_bh(&ifp->lock);
2612
2613 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
55ebaef1
NT		 2614 !(ifp->flags&IFA_F_TENTATIVE) ||
2615 ifp->flags & IFA_F_NODAD) {
95c385b4 2616 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2617 spin_unlock_bh(&ifp->lock);
2618 read_unlock_bh(&idev->lock);
2619
2620 addrconf_dad_completed(ifp);
2621 return;
2622 }
2623
6732bade 2624 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2625 spin_unlock_bh(&ifp->lock);
6732bade 2626 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2627 /*
2628 * If the defice is not ready:
2629 * - keep it tentative if it is a permanent address.
2630 * - otherwise, kill it.
2631 */
2632 in6_ifa_hold(ifp);
2633 addrconf_dad_stop(ifp);
6732bade 2634 return;
3c21edbd 2635 }
95c385b4
NH		 2636
2637 /*
2638 * Optimistic nodes can start receiving
2639 * Frames right away
2640 */
2641 if(ifp->flags & IFA_F_OPTIMISTIC)
2642 ip6_ins_rt(ifp->rt);
2643
6732bade
YH		 2644 addrconf_dad_kick(ifp);
2645 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2646out:
2647 read_unlock_bh(&idev->lock);
2648}
2649
2650static void addrconf_dad_timer(unsigned long data)
2651{
2652 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2653 struct inet6_dev *idev = ifp->idev;
2654 struct in6_addr unspec;
2655 struct in6_addr mcaddr;
2656
2657 read_lock_bh(&idev->lock);
2658 if (idev->dead) {
2659 read_unlock_bh(&idev->lock);
2660 goto out;
2661 }
2662 spin_lock_bh(&ifp->lock);
2663 if (ifp->probes == 0) {
2664 /*
2665 * DAD was successful
2666 */
2667
95c385b4 2668 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2669 spin_unlock_bh(&ifp->lock);
2670 read_unlock_bh(&idev->lock);
2671
2672 addrconf_dad_completed(ifp);
2673
2674 goto out;
2675 }
2676
2677 ifp->probes--;
2678 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2679 spin_unlock_bh(&ifp->lock);
2680 read_unlock_bh(&idev->lock);
2681
2682 /* send a neighbour solicitation for our addr */
2683 memset(&unspec, 0, sizeof(unspec));
2684 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2685 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2686out:
2687 in6_ifa_put(ifp);
2688}
2689
2690static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2691{
2692 struct net_device * dev = ifp->idev->dev;
2693
2694 /*
2695 * Configure the address for reception. Now it is valid.
2696 */
2697
2698 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2699
2700 /* If added prefix is link local and forwarding is off,
2701 start sending router solicitations.
2702 */
2703
2704 if (ifp->idev->cnf.forwarding == 0 &&
2705 ifp->idev->cnf.rtr_solicits > 0 &&
2706 (dev->flags&IFF_LOOPBACK) == 0 &&
2707 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2708 struct in6_addr all_routers;
2709
2710 ipv6_addr_all_routers(&all_routers);
2711
2712 /*
2713 * If a host as already performed a random delay
2714 * [...] as part of DAD [...] there is no need
2715 * to delay again before sending the first RS
2716 */
2717 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2718
2719 spin_lock_bh(&ifp->lock);
2720 ifp->probes = 1;
2721 ifp->idev->if_flags |= IF_RS_SENT;
2722 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2723 spin_unlock_bh(&ifp->lock);
2724 }
2725}
2726
c5e33bdd
YH		 2727static void addrconf_dad_run(struct inet6_dev *idev) {
2728 struct inet6_ifaddr *ifp;
2729
2730 read_lock_bh(&idev->lock);
2731 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2732 spin_lock_bh(&ifp->lock);
2733 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2734 spin_unlock_bh(&ifp->lock);
2735 continue;
2736 }
2737 spin_unlock_bh(&ifp->lock);
2738 addrconf_dad_kick(ifp);
2739 }
2740 read_unlock_bh(&idev->lock);
2741}
2742
1da177e4
LT		 2743#ifdef CONFIG_PROC_FS
2744struct if6_iter_state {
3c40090a 2745 struct seq_net_private p;
1da177e4
LT		 2746 int bucket;
2747};
2748
2749static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2750{
2751 struct inet6_ifaddr *ifa = NULL;
2752 struct if6_iter_state *state = seq->private;
3c40090a 2753 struct net *net = state->p.net;
1da177e4
LT		 2754
2755 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2756 ifa = inet6_addr_lst[state->bucket];
3c40090a
DL		 2757
2758 while (ifa && ifa->idev->dev->nd_net != net)
2759 ifa = ifa->lst_next;
1da177e4
LT		 2760 if (ifa)
2761 break;
2762 }
2763 return ifa;
2764}
2765
2766static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2767{
2768 struct if6_iter_state *state = seq->private;
3c40090a 2769 struct net *net = state->p.net;
1da177e4
LT		 2770
2771 ifa = ifa->lst_next;
2772try_again:
3c40090a
DL		 2773 if (ifa) {
2774 if (ifa->idev->dev->nd_net != net) {
2775 ifa = ifa->lst_next;
2776 goto try_again;
2777 }
2778 }
2779
1da177e4
LT		 2780 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2781 ifa = inet6_addr_lst[state->bucket];
2782 goto try_again;
2783 }
3c40090a 2784
1da177e4
LT		 2785 return ifa;
2786}
2787
2788static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2789{
2790 struct inet6_ifaddr *ifa = if6_get_first(seq);
2791
2792 if (ifa)
2793 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2794 --pos;
2795 return pos ? NULL : ifa;
2796}
2797
2798static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2799{
2800 read_lock_bh(&addrconf_hash_lock);
2801 return if6_get_idx(seq, *pos);
2802}
2803
2804static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2805{
2806 struct inet6_ifaddr *ifa;
2807
2808 ifa = if6_get_next(seq, v);
2809 ++*pos;
2810 return ifa;
2811}
2812
2813static void if6_seq_stop(struct seq_file *seq, void *v)
2814{
2815 read_unlock_bh(&addrconf_hash_lock);
2816}
2817
2818static int if6_seq_show(struct seq_file *seq, void *v)
2819{
2820 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2821 seq_printf(seq,
9343e79a 2822 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2823 NIP6(ifp->addr),
2824 ifp->idev->dev->ifindex,
2825 ifp->prefix_len,
2826 ifp->scope,
2827 ifp->flags,
2828 ifp->idev->dev->name);
2829 return 0;
2830}
2831
56b3d975 2832static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2833 .start = if6_seq_start,
2834 .next = if6_seq_next,
2835 .show = if6_seq_show,
2836 .stop = if6_seq_stop,
2837};
2838
2839static int if6_seq_open(struct inode *inode, struct file *file)
2840{
3c40090a
DL		 2841 return seq_open_net(inode, file, &if6_seq_ops,
2842 sizeof(struct if6_iter_state));
1da177e4
LT		 2843}
2844
9a32144e 2845static const struct file_operations if6_fops = {
1da177e4
LT		 2846 .owner = THIS_MODULE,
2847 .open = if6_seq_open,
2848 .read = seq_read,
2849 .llseek = seq_lseek,
3c40090a 2850 .release = seq_release_net,
1da177e4
LT		 2851};
2852
3c40090a 2853static int if6_proc_net_init(struct net *net)
1da177e4 2854{
3c40090a 2855 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2856 return -ENOMEM;
2857 return 0;
2858}
2859
3c40090a
DL		 2860static void if6_proc_net_exit(struct net *net)
2861{
2862 proc_net_remove(net, "if_inet6");
2863}
2864
2865static struct pernet_operations if6_proc_net_ops = {
2866 .init = if6_proc_net_init,
2867 .exit = if6_proc_net_exit,
2868};
2869
2870int __init if6_proc_init(void)
2871{
2872 return register_pernet_subsys(&if6_proc_net_ops);
2873}
2874
1da177e4
LT		 2875void if6_proc_exit(void)
2876{
3c40090a 2877 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 2878}
2879#endif /* CONFIG_PROC_FS */
2880
59fbb3a6 2881#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 2882/* Check if address is a home address configured on any interface. */
2883int ipv6_chk_home_addr(struct in6_addr *addr)
2884{
2885 int ret = 0;
2886 struct inet6_ifaddr * ifp;
2887 u8 hash = ipv6_addr_hash(addr);
2888 read_lock_bh(&addrconf_hash_lock);
2889 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2890 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2891 (ifp->flags & IFA_F_HOMEADDRESS)) {
2892 ret = 1;
2893 break;
2894 }
2895 }
2896 read_unlock_bh(&addrconf_hash_lock);
2897 return ret;
2898}
2899#endif
2900
1da177e4
LT		 2901/*
2902 * Periodic address status verification
2903 */
2904
2905static void addrconf_verify(unsigned long foo)
2906{
2907 struct inet6_ifaddr *ifp;
2908 unsigned long now, next;
2909 int i;
2910
2911 spin_lock_bh(&addrconf_verify_lock);
2912 now = jiffies;
2913 next = now + ADDR_CHECK_FREQUENCY;
2914
2915 del_timer(&addr_chk_timer);
2916
2917 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2918
2919restart:
5d5780df 2920 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2921 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2922 unsigned long age;
2923#ifdef CONFIG_IPV6_PRIVACY
2924 unsigned long regen_advance;
2925#endif
2926
2927 if (ifp->flags & IFA_F_PERMANENT)
2928 continue;
2929
2930 spin_lock(&ifp->lock);
2931 age = (now - ifp->tstamp) / HZ;
2932
2933#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 2934 regen_advance = ifp->idev->cnf.regen_max_retry *
2935 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 2936 ifp->idev->nd_parms->retrans_time / HZ;
2937#endif
2938
8f27ebb9
YH		 2939 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2940 age >= ifp->valid_lft) {
1da177e4
LT		 2941 spin_unlock(&ifp->lock);
2942 in6_ifa_hold(ifp);
5d5780df 2943 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2944 ipv6_del_addr(ifp);
2945 goto restart;
8f27ebb9
YH		 2946 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2947 spin_unlock(&ifp->lock);
2948 continue;
1da177e4
LT		 2949 } else if (age >= ifp->prefered_lft) {
2950 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2951 int deprecate = 0;
2952
2953 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2954 deprecate = 1;
2955 ifp->flags |= IFA_F_DEPRECATED;
2956 }
2957
2958 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2959 next = ifp->tstamp + ifp->valid_lft * HZ;
2960
2961 spin_unlock(&ifp->lock);
2962
2963 if (deprecate) {
2964 in6_ifa_hold(ifp);
5d5780df 2965 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2966
2967 ipv6_ifa_notify(0, ifp);
2968 in6_ifa_put(ifp);
2969 goto restart;
2970 }
2971#ifdef CONFIG_IPV6_PRIVACY
2972 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2973 !(ifp->flags&IFA_F_TENTATIVE)) {
2974 if (age >= ifp->prefered_lft - regen_advance) {
2975 struct inet6_ifaddr *ifpub = ifp->ifpub;
2976 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2977 next = ifp->tstamp + ifp->prefered_lft * HZ;
2978 if (!ifp->regen_count && ifpub) {
2979 ifp->regen_count++;
2980 in6_ifa_hold(ifp);
2981 in6_ifa_hold(ifpub);
2982 spin_unlock(&ifp->lock);
5d5780df 2983 read_unlock(&addrconf_hash_lock);
291d809b
HY		 2984 spin_lock(&ifpub->lock);
2985 ifpub->regen_count = 0;
2986 spin_unlock(&ifpub->lock);
1da177e4
LT		 2987 ipv6_create_tempaddr(ifpub, ifp);
2988 in6_ifa_put(ifpub);
2989 in6_ifa_put(ifp);
2990 goto restart;
2991 }
2992 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2993 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2994 spin_unlock(&ifp->lock);
2995#endif
2996 } else {
2997 /* ifp->prefered_lft <= ifp->valid_lft */
2998 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2999 next = ifp->tstamp + ifp->prefered_lft * HZ;
3000 spin_unlock(&ifp->lock);
3001 }
3002 }
5d5780df 3003 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3004 }
3005
3006 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3007 add_timer(&addr_chk_timer);
3008 spin_unlock_bh(&addrconf_verify_lock);
3009}
3010
461d8837
TG		 3011static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3012{
3013 struct in6_addr *pfx = NULL;
3014
3015 if (addr)
3016 pfx = nla_data(addr);
3017
3018 if (local) {
3019 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3020 pfx = NULL;
3021 else
3022 pfx = nla_data(local);
3023 }
3024
3025 return pfx;
3026}
3027
ef7c79ed 3028static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3029 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3030 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3031 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3032};
3033
1da177e4
LT		 3034static int
3035inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3036{
b854272b 3037 struct net *net = skb->sk->sk_net;
b933f716
TG		 3038 struct ifaddrmsg *ifm;
3039 struct nlattr *tb[IFA_MAX+1];
1da177e4 3040 struct in6_addr *pfx;
b933f716 3041 int err;
1da177e4 3042
b854272b
DL		 3043 if (net != &init_net)
3044 return -EINVAL;
3045
b933f716
TG		 3046 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3047 if (err < 0)
3048 return err;
3049
3050 ifm = nlmsg_data(nlh);
3051 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3052 if (pfx == NULL)
3053 return -EINVAL;
3054
3055 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3056}
3057
55ebaef1
NT		 3058static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3059 u32 prefered_lft, u32 valid_lft)
081bba5b 3060{
46d48046
YH		 3061 u32 flags = RTF_EXPIRES;
3062
081bba5b
NT		 3063 if (!valid_lft || (prefered_lft > valid_lft))
3064 return -EINVAL;
3065
46d48046 3066 if (valid_lft == INFINITY_LIFE_TIME) {
55ebaef1 3067 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 3068 flags = 0;
3069 } else if (valid_lft >= 0x7FFFFFFF/HZ)
081bba5b
NT		 3070 valid_lft = 0x7FFFFFFF/HZ;
3071
3072 if (prefered_lft == 0)
55ebaef1 3073 ifa_flags |= IFA_F_DEPRECATED;
081bba5b
NT		 3074 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3075 (prefered_lft != INFINITY_LIFE_TIME))
3076 prefered_lft = 0x7FFFFFFF/HZ;
3077
3078 spin_lock_bh(&ifp->lock);
3b9f9a1c 3079 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3080 ifp->tstamp = jiffies;
3081 ifp->valid_lft = valid_lft;
3082 ifp->prefered_lft = prefered_lft;
3083
3084 spin_unlock_bh(&ifp->lock);
3085 if (!(ifp->flags&IFA_F_TENTATIVE))
3086 ipv6_ifa_notify(0, ifp);
081bba5b 3087
46d48046
YH		 3088 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3089 jiffies_to_clock_t(valid_lft * HZ), flags);
081bba5b
NT		 3090 addrconf_verify(0);
3091
3092 return 0;
3093}
3094
1da177e4
LT		 3095static int
3096inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3097{
b854272b 3098 struct net *net = skb->sk->sk_net;
461d8837
TG		 3099 struct ifaddrmsg *ifm;
3100 struct nlattr *tb[IFA_MAX+1];
1da177e4 3101 struct in6_addr *pfx;
7198f8ce
TG		 3102 struct inet6_ifaddr *ifa;
3103 struct net_device *dev;
55ebaef1
NT		 3104 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3105 u8 ifa_flags;
461d8837 3106 int err;
1da177e4 3107
b854272b
DL		 3108 if (net != &init_net)
3109 return -EINVAL;
3110
461d8837
TG		 3111 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3112 if (err < 0)
3113 return err;
3114
3115 ifm = nlmsg_data(nlh);
3116 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3117 if (pfx == NULL)
3118 return -EINVAL;
3119
461d8837 3120 if (tb[IFA_CACHEINFO]) {
0778769d 3121 struct ifa_cacheinfo *ci;
461d8837
TG		 3122
3123 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3124 valid_lft = ci->ifa_valid;
461d8837
TG		 3125 preferred_lft = ci->ifa_prefered;
3126 } else {
3127 preferred_lft = INFINITY_LIFE_TIME;
3128 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3129 }
3130
881d966b 3131 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
7198f8ce
TG		 3132 if (dev == NULL)
3133 return -ENODEV;
3134
55ebaef1 3135 /* We ignore other flags so far. */
3b9f9a1c 3136 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3137
7198f8ce
TG		 3138 ifa = ipv6_get_ifaddr(pfx, dev, 1);
3139 if (ifa == NULL) {
3140 /*
3141 * It would be best to check for !NLM_F_CREATE here but
3142 * userspace alreay relies on not having to provide this.
3143 */
3144 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
55ebaef1 3145 ifa_flags, preferred_lft, valid_lft);
081bba5b
NT		 3146 }
3147
7198f8ce
TG		 3148 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3149 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3150 err = -EEXIST;
3151 else
55ebaef1 3152 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3153
3154 in6_ifa_put(ifa);
3155
3156 return err;
1da177e4
LT		 3157}
3158
101bb229
TG		 3159static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3160 u8 scope, int ifindex)
3161{
3162 struct ifaddrmsg *ifm;
3163
3164 ifm = nlmsg_data(nlh);
3165 ifm->ifa_family = AF_INET6;
3166 ifm->ifa_prefixlen = prefixlen;
3167 ifm->ifa_flags = flags;
3168 ifm->ifa_scope = scope;
3169 ifm->ifa_index = ifindex;
3170}
3171
85486af0
TG		 3172static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3173 unsigned long tstamp, u32 preferred, u32 valid)
3174{
3175 struct ifa_cacheinfo ci;
3176
3177 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3178 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3179 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3180 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3181 ci.ifa_prefered = preferred;
3182 ci.ifa_valid = valid;
3183
3184 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3185}
3186
101bb229
TG		 3187static inline int rt_scope(int ifa_scope)
3188{
3189 if (ifa_scope & IFA_HOST)
3190 return RT_SCOPE_HOST;
3191 else if (ifa_scope & IFA_LINK)
3192 return RT_SCOPE_LINK;
3193 else if (ifa_scope & IFA_SITE)
3194 return RT_SCOPE_SITE;
3195 else
3196 return RT_SCOPE_UNIVERSE;
3197}
3198
0ab6803b
TG		 3199static inline int inet6_ifaddr_msgsize(void)
3200{
339bf98f
TG		 3201 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3202 + nla_total_size(16) /* IFA_ADDRESS */
3203 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3204}
c5396a31 3205
1da177e4 3206static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3207 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3208{
1da177e4 3209 struct nlmsghdr *nlh;
85486af0 3210 u32 preferred, valid;
1da177e4 3211
0ab6803b
TG		 3212 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3213 if (nlh == NULL)
26932566 3214 return -EMSGSIZE;
0ab6803b 3215
101bb229
TG		 3216 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3217 ifa->idev->dev->ifindex);
3218
1da177e4 3219 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3220 preferred = ifa->prefered_lft;
3221 valid = ifa->valid_lft;
3222 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3223 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3224 preferred -= tval;
3225 if (valid != INFINITY_LIFE_TIME)
3226 valid -= tval;
1da177e4
LT		 3227 }
3228 } else {
85486af0
TG		 3229 preferred = INFINITY_LIFE_TIME;
3230 valid = INFINITY_LIFE_TIME;
3231 }
3232
0ab6803b 3233 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3234 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3235 nlmsg_cancel(skb, nlh);
3236 return -EMSGSIZE;
3237 }
1da177e4 3238
0ab6803b 3239 return nlmsg_end(skb, nlh);
1da177e4
LT		 3240}
3241
3242static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3243 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3244{
1da177e4 3245 struct nlmsghdr *nlh;
101bb229
TG		 3246 u8 scope = RT_SCOPE_UNIVERSE;
3247 int ifindex = ifmca->idev->dev->ifindex;
3248
3249 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3250 scope = RT_SCOPE_SITE;
1da177e4 3251
0ab6803b
TG		 3252 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3253 if (nlh == NULL)
26932566 3254 return -EMSGSIZE;
85486af0 3255
0ab6803b
TG		 3256 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3257 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3258 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3259 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3260 nlmsg_cancel(skb, nlh);
3261 return -EMSGSIZE;
3262 }
85486af0 3263
0ab6803b 3264 return nlmsg_end(skb, nlh);
1da177e4
LT		 3265}
3266
3267static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3268 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3269{
1da177e4 3270 struct nlmsghdr *nlh;
101bb229
TG		 3271 u8 scope = RT_SCOPE_UNIVERSE;
3272 int ifindex = ifaca->aca_idev->dev->ifindex;
3273
3274 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3275 scope = RT_SCOPE_SITE;
1da177e4 3276
0ab6803b
TG		 3277 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3278 if (nlh == NULL)
26932566 3279 return -EMSGSIZE;
85486af0 3280
0ab6803b
TG		 3281 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3282 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3283 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3284 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3285 nlmsg_cancel(skb, nlh);
3286 return -EMSGSIZE;
3287 }
1da177e4 3288
0ab6803b 3289 return nlmsg_end(skb, nlh);
1da177e4
LT		 3290}
3291
3292enum addr_type_t
3293{
3294 UNICAST_ADDR,
3295 MULTICAST_ADDR,
3296 ANYCAST_ADDR,
3297};
3298
3299static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3300 enum addr_type_t type)
3301{
3302 int idx, ip_idx;
3303 int s_idx, s_ip_idx;
3304 int err = 1;
3305 struct net_device *dev;
3306 struct inet6_dev *idev = NULL;
3307 struct inet6_ifaddr *ifa;
3308 struct ifmcaddr6 *ifmca;
3309 struct ifacaddr6 *ifaca;
3310
3311 s_idx = cb->args[0];
3312 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3313
7562f876 3314 idx = 0;
881d966b 3315 for_each_netdev(&init_net, dev) {
1da177e4 3316 if (idx < s_idx)
7562f876 3317 goto cont;
1da177e4
LT		 3318 if (idx > s_idx)
3319 s_ip_idx = 0;
3320 ip_idx = 0;
3321 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3322 goto cont;
1da177e4
LT		 3323 read_lock_bh(&idev->lock);
3324 switch (type) {
3325 case UNICAST_ADDR:
ae9cda5d 3326 /* unicast address incl. temp addr */
1da177e4
LT		 3327 for (ifa = idev->addr_list; ifa;
3328 ifa = ifa->if_next, ip_idx++) {
3329 if (ip_idx < s_ip_idx)
3330 continue;
1ab1457c
YH		 3331 if ((err = inet6_fill_ifaddr(skb, ifa,
3332 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3333 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3334 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3335 goto done;
3336 }
1da177e4
LT		 3337 break;
3338 case MULTICAST_ADDR:
3339 /* multicast address */
1ab1457c 3340 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3341 ifmca = ifmca->next, ip_idx++) {
3342 if (ip_idx < s_ip_idx)
3343 continue;
1ab1457c
YH		 3344 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3345 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3346 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3347 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3348 goto done;
3349 }
3350 break;
3351 case ANYCAST_ADDR:
3352 /* anycast address */
3353 for (ifaca = idev->ac_list; ifaca;
3354 ifaca = ifaca->aca_next, ip_idx++) {
3355 if (ip_idx < s_ip_idx)
3356 continue;
1ab1457c
YH		 3357 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3358 NETLINK_CB(cb->skb).pid,
b6544c0b 3359 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
1ab1457c 3360 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3361 goto done;
3362 }
3363 break;
3364 default:
3365 break;
3366 }
3367 read_unlock_bh(&idev->lock);
3368 in6_dev_put(idev);
7562f876
PE		 3369cont:
3370 idx++;
1da177e4
LT		 3371 }
3372done:
3373 if (err <= 0) {
3374 read_unlock_bh(&idev->lock);
3375 in6_dev_put(idev);
3376 }
1da177e4
LT		 3377 cb->args[0] = idx;
3378 cb->args[1] = ip_idx;
3379 return skb->len;
3380}
3381
3382static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3383{
b854272b 3384 struct net *net = skb->sk->sk_net;
1da177e4 3385 enum addr_type_t type = UNICAST_ADDR;
b854272b
DL		 3386
3387 if (net != &init_net)
3388 return 0;
3389
1da177e4
LT		 3390 return inet6_dump_addr(skb, cb, type);
3391}
3392
3393static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3394{
b854272b 3395 struct net *net = skb->sk->sk_net;
1da177e4 3396 enum addr_type_t type = MULTICAST_ADDR;
b854272b
DL		 3397
3398 if (net != &init_net)
3399 return 0;
3400
1da177e4
LT		 3401 return inet6_dump_addr(skb, cb, type);
3402}
3403
3404
3405static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3406{
b854272b 3407 struct net *net = skb->sk->sk_net;
1da177e4 3408 enum addr_type_t type = ANYCAST_ADDR;
b854272b
DL		 3409
3410 if (net != &init_net)
3411 return 0;
3412
1da177e4
LT		 3413 return inet6_dump_addr(skb, cb, type);
3414}
3415
1b29fc2c
TG		 3416static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3417 void *arg)
6c223828 3418{
b854272b 3419 struct net *net = in_skb->sk->sk_net;
1b29fc2c
TG		 3420 struct ifaddrmsg *ifm;
3421 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3422 struct in6_addr *addr = NULL;
3423 struct net_device *dev = NULL;
3424 struct inet6_ifaddr *ifa;
3425 struct sk_buff *skb;
6c223828
NT		 3426 int err;
3427
b854272b
DL		 3428 if (net != &init_net)
3429 return -EINVAL;
3430
1b29fc2c
TG		 3431 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3432 if (err < 0)
3433 goto errout;
3434
3435 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3436 if (addr == NULL) {
3437 err = -EINVAL;
3438 goto errout;
6c223828 3439 }
6c223828 3440
1b29fc2c 3441 ifm = nlmsg_data(nlh);
6c223828 3442 if (ifm->ifa_index)
881d966b 3443 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
6c223828 3444
1b29fc2c
TG		 3445 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3446 err = -EADDRNOTAVAIL;
3447 goto errout;
3448 }
6c223828 3449
0ab6803b 3450 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3451 err = -ENOBUFS;
1b29fc2c 3452 goto errout_ifa;
6c223828
NT		 3453 }
3454
6c223828
NT		 3455 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3456 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3457 if (err < 0) {
3458 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3459 WARN_ON(err == -EMSGSIZE);
3460 kfree_skb(skb);
3461 goto errout_ifa;
3462 }
97c53cac 3463 err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid);
1b29fc2c 3464errout_ifa:
6c223828 3465 in6_ifa_put(ifa);
1b29fc2c 3466errout:
6c223828 3467 return err;
6c223828
NT		 3468}
3469
1da177e4
LT		 3470static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3471{
3472 struct sk_buff *skb;
5d620266 3473 int err = -ENOBUFS;
1da177e4 3474
0ab6803b 3475 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3476 if (skb == NULL)
3477 goto errout;
3478
3479 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3480 if (err < 0) {
3481 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3482 WARN_ON(err == -EMSGSIZE);
3483 kfree_skb(skb);
3484 goto errout;
3485 }
97c53cac 3486 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
5d620266
TG		 3487errout:
3488 if (err < 0)
97c53cac 3489 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3490}
3491
b6f99a21 3492static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3493 __s32 *array, int bytes)
3494{
04561c1f
TG		 3495 BUG_ON(bytes < (DEVCONF_MAX * 4));
3496
1da177e4
LT		 3497 memset(array, 0, bytes);
3498 array[DEVCONF_FORWARDING] = cnf->forwarding;
3499 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3500 array[DEVCONF_MTU6] = cnf->mtu6;
3501 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3502 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3503 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3504 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3505 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3506 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3507 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3508 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3509#ifdef CONFIG_IPV6_PRIVACY
3510 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3511 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3512 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3513 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3514 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3515#endif
3516 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3517 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3518 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3519#ifdef CONFIG_IPV6_ROUTER_PREF
3520 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3521 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3522#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3523 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3524#endif
930d6ff2 3525#endif
fbea49e1 3526 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3527 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3528#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3529 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3530#endif
1da177e4
LT		 3531}
3532
339bf98f
TG		 3533static inline size_t inet6_if_nlmsg_size(void)
3534{
3535 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3536 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3537 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3538 + nla_total_size(4) /* IFLA_MTU */
3539 + nla_total_size(4) /* IFLA_LINK */
3540 + nla_total_size( /* IFLA_PROTINFO */
3541 nla_total_size(4) /* IFLA_INET6_FLAGS */
3542 + nla_total_size(sizeof(struct ifla_cacheinfo))
3543 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3544 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3545 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3546 );
3547}
c5396a31 3548
7f7d9a6b
HX		 3549static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3550 int bytes)
3551{
3552 int i;
3553 int pad = bytes - sizeof(u64) * items;
3554 BUG_ON(pad < 0);
3555
3556 /* Use put_unaligned() because stats may not be aligned for u64. */
3557 put_unaligned(items, &stats[0]);
3558 for (i = 1; i < items; i++)
3559 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3560
3561 memset(&stats[items], 0, pad);
3562}
3563
3564static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3565 int bytes)
3566{
3567 switch(attrtype) {
3568 case IFLA_INET6_STATS:
3569 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3570 break;
3571 case IFLA_INET6_ICMP6STATS:
3572 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3573 break;
3574 }
3575}
3576
1ab1457c 3577static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3578 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3579{
04561c1f 3580 struct net_device *dev = idev->dev;
bf99f1bd 3581 struct nlattr *nla;
04561c1f
TG		 3582 struct ifinfomsg *hdr;
3583 struct nlmsghdr *nlh;
3584 void *protoinfo;
3585 struct ifla_cacheinfo ci;
3586
3587 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3588 if (nlh == NULL)
26932566 3589 return -EMSGSIZE;
04561c1f
TG		 3590
3591 hdr = nlmsg_data(nlh);
3592 hdr->ifi_family = AF_INET6;
3593 hdr->__ifi_pad = 0;
3594 hdr->ifi_type = dev->type;
3595 hdr->ifi_index = dev->ifindex;
3596 hdr->ifi_flags = dev_get_flags(dev);
3597 hdr->ifi_change = 0;
3598
3599 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3600
3601 if (dev->addr_len)
04561c1f 3602 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3603
04561c1f 3604 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3605 if (dev->ifindex != dev->iflink)
04561c1f 3606 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3607
04561c1f
TG		 3608 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3609 if (protoinfo == NULL)
3610 goto nla_put_failure;
1da177e4 3611
04561c1f 3612 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3613
1da177e4
LT		 3614 ci.max_reasm_len = IPV6_MAXPLEN;
3615 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3616 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3617 ci.reachable_time = idev->nd_parms->reachable_time;
3618 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3619 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3620
bf99f1bd
YH		 3621 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3622 if (nla == NULL)
04561c1f 3623 goto nla_put_failure;
bf99f1bd 3624 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3625
bf99f1bd
YH		 3626 /* XXX - MC not implemented */
3627
3628 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3629 if (nla == NULL)
3630 goto nla_put_failure;
3631 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3632
3633 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3634 if (nla == NULL)
3635 goto nla_put_failure;
3636 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3637
04561c1f
TG		 3638 nla_nest_end(skb, protoinfo);
3639 return nlmsg_end(skb, nlh);
1da177e4 3640
04561c1f 3641nla_put_failure:
26932566
PM		 3642 nlmsg_cancel(skb, nlh);
3643 return -EMSGSIZE;
1da177e4
LT		 3644}
3645
3646static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3647{
b854272b 3648 struct net *net = skb->sk->sk_net;
1da177e4
LT		 3649 int idx, err;
3650 int s_idx = cb->args[0];
3651 struct net_device *dev;
3652 struct inet6_dev *idev;
3653
b854272b
DL		 3654 if (net != &init_net)
3655 return 0;
3656
1da177e4 3657 read_lock(&dev_base_lock);
7562f876 3658 idx = 0;
881d966b 3659 for_each_netdev(&init_net, dev) {
1da177e4 3660 if (idx < s_idx)
7562f876 3661 goto cont;
1da177e4 3662 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3663 goto cont;
1ab1457c 3664 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3665 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3666 in6_dev_put(idev);
3667 if (err <= 0)
3668 break;
7562f876
PE		 3669cont:
3670 idx++;
1da177e4
LT		 3671 }
3672 read_unlock(&dev_base_lock);
3673 cb->args[0] = idx;
3674
3675 return skb->len;
3676}
3677
3678void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3679{
3680 struct sk_buff *skb;
8d7a76c9 3681 int err = -ENOBUFS;
1ab1457c 3682
339bf98f 3683 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3684 if (skb == NULL)
3685 goto errout;
3686
3687 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3688 if (err < 0) {
3689 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3690 WARN_ON(err == -EMSGSIZE);
3691 kfree_skb(skb);
3692 goto errout;
3693 }
97c53cac 3694 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
8d7a76c9
TG		 3695errout:
3696 if (err < 0)
97c53cac 3697 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3698}
3699
339bf98f
TG		 3700static inline size_t inet6_prefix_nlmsg_size(void)
3701{
3702 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3703 + nla_total_size(sizeof(struct in6_addr))
3704 + nla_total_size(sizeof(struct prefix_cacheinfo));
3705}
c5396a31 3706
1da177e4 3707static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3708 struct prefix_info *pinfo, u32 pid, u32 seq,
3709 int event, unsigned int flags)
1da177e4 3710{
6051e2f4
TG		 3711 struct prefixmsg *pmsg;
3712 struct nlmsghdr *nlh;
1da177e4
LT		 3713 struct prefix_cacheinfo ci;
3714
6051e2f4
TG		 3715 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3716 if (nlh == NULL)
26932566 3717 return -EMSGSIZE;
6051e2f4
TG		 3718
3719 pmsg = nlmsg_data(nlh);
1da177e4 3720 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3721 pmsg->prefix_pad1 = 0;
3722 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3723 pmsg->prefix_ifindex = idev->dev->ifindex;
3724 pmsg->prefix_len = pinfo->prefix_len;
3725 pmsg->prefix_type = pinfo->type;
8a47077a 3726 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3727 pmsg->prefix_flags = 0;
3728 if (pinfo->onlink)
3729 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3730 if (pinfo->autoconf)
3731 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3732
6051e2f4 3733 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3734
3735 ci.preferred_time = ntohl(pinfo->prefered);
3736 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3737 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3738
6051e2f4 3739 return nlmsg_end(skb, nlh);
1da177e4 3740
6051e2f4 3741nla_put_failure:
26932566
PM		 3742 nlmsg_cancel(skb, nlh);
3743 return -EMSGSIZE;
1da177e4
LT		 3744}
3745
1ab1457c 3746static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3747 struct prefix_info *pinfo)
3748{
3749 struct sk_buff *skb;
8c384bfa 3750 int err = -ENOBUFS;
1da177e4 3751
339bf98f 3752 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3753 if (skb == NULL)
3754 goto errout;
3755
3756 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3757 if (err < 0) {
3758 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3759 WARN_ON(err == -EMSGSIZE);
3760 kfree_skb(skb);
3761 goto errout;
3762 }
97c53cac 3763 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
8c384bfa
TG		 3764errout:
3765 if (err < 0)
97c53cac 3766 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3767}
3768
1da177e4
LT		 3769static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3770{
3771 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3772
3773 switch (event) {
3774 case RTM_NEWADDR:
95c385b4
NH		 3775 /*
3776 * If the address was optimistic
3777 * we inserted the route at the start of
3778 * our DAD process, so we don't need
3779 * to do it again
3780 */
3781 if (!(ifp->rt->rt6i_node))
3782 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3783 if (ifp->idev->cnf.forwarding)
3784 addrconf_join_anycast(ifp);
3785 break;
3786 case RTM_DELADDR:
3787 if (ifp->idev->cnf.forwarding)
3788 addrconf_leave_anycast(ifp);
3789 addrconf_leave_solict(ifp->idev, &ifp->addr);
3790 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3791 if (ip6_del_rt(ifp->rt))
1da177e4 3792 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3793 break;
3794 }
3795}
3796
3797static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3798{
8814c4b5 3799 rcu_read_lock_bh();
1da177e4
LT		 3800 if (likely(ifp->idev->dead == 0))
3801 __ipv6_ifa_notify(event, ifp);
8814c4b5 3802 rcu_read_unlock_bh();
1da177e4
LT		 3803}
3804
3805#ifdef CONFIG_SYSCTL
3806
3807static
3808int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3809 void __user *buffer, size_t *lenp, loff_t *ppos)
3810{
3811 int *valp = ctl->data;
3812 int val = *valp;
3813 int ret;
3814
3815 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3816
c8fecf22
PE		 3817 if (write)
3818 addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3819 return ret;
1da177e4
LT		 3820}
3821
1ab1457c 3822static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3823 int __user *name, int nlen,
3824 void __user *oldval,
3825 size_t __user *oldlenp,
1f29bcd7 3826 void __user *newval, size_t newlen)
1da177e4
LT		 3827{
3828 int *valp = table->data;
c8fecf22 3829 int val = *valp;
1da177e4
LT		 3830 int new;
3831
3832 if (!newval || !newlen)
3833 return 0;
3834 if (newlen != sizeof(int))
3835 return -EINVAL;
3836 if (get_user(new, (int __user *)newval))
3837 return -EFAULT;
3838 if (new == *valp)
3839 return 0;
3840 if (oldval && oldlenp) {
3841 size_t len;
3842 if (get_user(len, oldlenp))
3843 return -EFAULT;
3844 if (len) {
3845 if (len > table->maxlen)
3846 len = table->maxlen;
3847 if (copy_to_user(oldval, valp, len))
3848 return -EFAULT;
3849 if (put_user(len, oldlenp))
3850 return -EFAULT;
3851 }
3852 }
3853
c8fecf22
PE		 3854 *valp = new;
3855 addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 3856 return 1;
3857}
3858
3859static struct addrconf_sysctl_table
3860{
3861 struct ctl_table_header *sysctl_header;
3862 ctl_table addrconf_vars[__NET_IPV6_MAX];
1dab6222 3863 char *dev_name;
ab32ea5d 3864} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3865 .sysctl_header = NULL,
3866 .addrconf_vars = {
1ab1457c 3867 {
1da177e4
LT		 3868 .ctl_name = NET_IPV6_FORWARDING,
3869 .procname = "forwarding",
1ab1457c 3870 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 3871 .maxlen = sizeof(int),
3872 .mode = 0644,
1ab1457c 3873 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 3874 .strategy = &addrconf_sysctl_forward_strategy,
3875 },
3876 {
3877 .ctl_name = NET_IPV6_HOP_LIMIT,
3878 .procname = "hop_limit",
1ab1457c 3879 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 3880 .maxlen = sizeof(int),
3881 .mode = 0644,
3882 .proc_handler = proc_dointvec,
3883 },
3884 {
3885 .ctl_name = NET_IPV6_MTU,
3886 .procname = "mtu",
3887 .data = &ipv6_devconf.mtu6,
1ab1457c 3888 .maxlen = sizeof(int),
1da177e4 3889 .mode = 0644,
1ab1457c 3890 .proc_handler = &proc_dointvec,
1da177e4
LT		 3891 },
3892 {
3893 .ctl_name = NET_IPV6_ACCEPT_RA,
3894 .procname = "accept_ra",
1ab1457c 3895 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 3896 .maxlen = sizeof(int),
3897 .mode = 0644,
1ab1457c 3898 .proc_handler = &proc_dointvec,
1da177e4
LT		 3899 },
3900 {
3901 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3902 .procname = "accept_redirects",
1ab1457c 3903 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 3904 .maxlen = sizeof(int),
3905 .mode = 0644,
1ab1457c 3906 .proc_handler = &proc_dointvec,
1da177e4
LT		 3907 },
3908 {
3909 .ctl_name = NET_IPV6_AUTOCONF,
3910 .procname = "autoconf",
1ab1457c 3911 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 3912 .maxlen = sizeof(int),
3913 .mode = 0644,
1ab1457c 3914 .proc_handler = &proc_dointvec,
1da177e4
LT		 3915 },
3916 {
3917 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3918 .procname = "dad_transmits",
1ab1457c 3919 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 3920 .maxlen = sizeof(int),
3921 .mode = 0644,
1ab1457c 3922 .proc_handler = &proc_dointvec,
1da177e4
LT		 3923 },
3924 {
3925 .ctl_name = NET_IPV6_RTR_SOLICITS,
3926 .procname = "router_solicitations",
1ab1457c 3927 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 3928 .maxlen = sizeof(int),
3929 .mode = 0644,
1ab1457c 3930 .proc_handler = &proc_dointvec,
1da177e4
LT		 3931 },
3932 {
3933 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3934 .procname = "router_solicitation_interval",
1ab1457c 3935 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 3936 .maxlen = sizeof(int),
3937 .mode = 0644,
1ab1457c 3938 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3939 .strategy = &sysctl_jiffies,
3940 },
3941 {
3942 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3943 .procname = "router_solicitation_delay",
1ab1457c 3944 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 3945 .maxlen = sizeof(int),
3946 .mode = 0644,
1ab1457c 3947 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3948 .strategy = &sysctl_jiffies,
3949 },
3950 {
3951 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3952 .procname = "force_mld_version",
1ab1457c 3953 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 3954 .maxlen = sizeof(int),
3955 .mode = 0644,
1ab1457c 3956 .proc_handler = &proc_dointvec,
1da177e4
LT		 3957 },
3958#ifdef CONFIG_IPV6_PRIVACY
3959 {
3960 .ctl_name = NET_IPV6_USE_TEMPADDR,
3961 .procname = "use_tempaddr",
1ab1457c 3962 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 3963 .maxlen = sizeof(int),
3964 .mode = 0644,
1ab1457c 3965 .proc_handler = &proc_dointvec,
1da177e4
LT		 3966 },
3967 {
3968 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3969 .procname = "temp_valid_lft",
1ab1457c 3970 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 3971 .maxlen = sizeof(int),
3972 .mode = 0644,
1ab1457c 3973 .proc_handler = &proc_dointvec,
1da177e4
LT		 3974 },
3975 {
3976 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3977 .procname = "temp_prefered_lft",
1ab1457c 3978 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 3979 .maxlen = sizeof(int),
3980 .mode = 0644,
1ab1457c 3981 .proc_handler = &proc_dointvec,
1da177e4
LT		 3982 },
3983 {
3984 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3985 .procname = "regen_max_retry",
1ab1457c 3986 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 3987 .maxlen = sizeof(int),
3988 .mode = 0644,
1ab1457c 3989 .proc_handler = &proc_dointvec,
1da177e4
LT		 3990 },
3991 {
3992 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3993 .procname = "max_desync_factor",
1ab1457c 3994 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 3995 .maxlen = sizeof(int),
3996 .mode = 0644,
1ab1457c 3997 .proc_handler = &proc_dointvec,
1da177e4
LT		 3998 },
3999#endif
4000 {
4001 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4002 .procname = "max_addresses",
4003 .data = &ipv6_devconf.max_addresses,
4004 .maxlen = sizeof(int),
4005 .mode = 0644,
4006 .proc_handler = &proc_dointvec,
4007 },
65f5c7c1
YH		 4008 {
4009 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4010 .procname = "accept_ra_defrtr",
1ab1457c 4011 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4012 .maxlen = sizeof(int),
4013 .mode = 0644,
1ab1457c 4014 .proc_handler = &proc_dointvec,
65f5c7c1 4015 },
c4fd30eb
YH		 4016 {
4017 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4018 .procname = "accept_ra_pinfo",
1ab1457c 4019 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4020 .maxlen = sizeof(int),
4021 .mode = 0644,
1ab1457c 4022 .proc_handler = &proc_dointvec,
c4fd30eb 4023 },
930d6ff2
YH		 4024#ifdef CONFIG_IPV6_ROUTER_PREF
4025 {
4026 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4027 .procname = "accept_ra_rtr_pref",
4028 .data = &ipv6_devconf.accept_ra_rtr_pref,
4029 .maxlen = sizeof(int),
4030 .mode = 0644,
4031 .proc_handler = &proc_dointvec,
4032 },
52e16356
YH		 4033 {
4034 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4035 .procname = "router_probe_interval",
4036 .data = &ipv6_devconf.rtr_probe_interval,
4037 .maxlen = sizeof(int),
4038 .mode = 0644,
4039 .proc_handler = &proc_dointvec_jiffies,
4040 .strategy = &sysctl_jiffies,
4041 },
fa03ef38 4042#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4043 {
4044 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4045 .procname = "accept_ra_rt_info_max_plen",
4046 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4047 .maxlen = sizeof(int),
4048 .mode = 0644,
4049 .proc_handler = &proc_dointvec,
4050 },
4051#endif
930d6ff2 4052#endif
fbea49e1
YH		 4053 {
4054 .ctl_name = NET_IPV6_PROXY_NDP,
4055 .procname = "proxy_ndp",
4056 .data = &ipv6_devconf.proxy_ndp,
4057 .maxlen = sizeof(int),
4058 .mode = 0644,
4059 .proc_handler = &proc_dointvec,
4060 },
0bcbc926
YH		 4061 {
4062 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4063 .procname = "accept_source_route",
4064 .data = &ipv6_devconf.accept_source_route,
4065 .maxlen = sizeof(int),
4066 .mode = 0644,
4067 .proc_handler = &proc_dointvec,
4068 },
95c385b4
NH		 4069#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4070 {
4071 .ctl_name = CTL_UNNUMBERED,
4072 .procname = "optimistic_dad",
4073 .data = &ipv6_devconf.optimistic_dad,
4074 .maxlen = sizeof(int),
4075 .mode = 0644,
4076 .proc_handler = &proc_dointvec,
4077
4078 },
4079#endif
1da177e4
LT		 4080 {
4081 .ctl_name = 0, /* sentinel */
4082 }
4083 },
1da177e4
LT		 4084};
4085
bff16c2f
PE		 4086static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4087 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4088{
4089 int i;
1da177e4 4090 struct addrconf_sysctl_table *t;
1da177e4 4091
1dab6222
PE		 4092#define ADDRCONF_CTL_PATH_DEV 3
4093
4094 struct ctl_path addrconf_ctl_path[] = {
4095 { .procname = "net", .ctl_name = CTL_NET, },
4096 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4097 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4098 { /* to be set */ },
4099 { },
4100 };
4101
4102
af879cc7 4103 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4104 if (t == NULL)
f68635e6
PE		 4105 goto out;
4106
1da177e4
LT		 4107 for (i=0; t->addrconf_vars[i].data; i++) {
4108 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4109 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4110 t->addrconf_vars[i].extra2 = net;
1da177e4 4111 }
1da177e4 4112
1ab1457c
YH		 4113 /*
4114 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4115 * by sysctl and we wouldn't want anyone to change it under our feet
4116 * (see SIOCSIFNAME).
1ab1457c 4117 */
1dab6222
PE		 4118 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4119 if (!t->dev_name)
f68635e6 4120 goto free;
1da177e4 4121
1dab6222
PE		 4122 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4123 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4124
bff16c2f 4125 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4126 t->addrconf_vars);
1da177e4
LT		 4127 if (t->sysctl_header == NULL)
4128 goto free_procname;
f68635e6
PE		 4129
4130 p->sysctl = t;
95897312 4131 return 0;
1da177e4 4132
f68635e6 4133free_procname:
1dab6222 4134 kfree(t->dev_name);
f68635e6 4135free:
1da177e4 4136 kfree(t);
f68635e6 4137out:
95897312 4138 return -ENOBUFS;
1da177e4
LT		 4139}
4140
408c4768
PE		 4141static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4142{
4143 struct addrconf_sysctl_table *t;
4144
4145 if (p->sysctl == NULL)
4146 return;
4147
4148 t = p->sysctl;
4149 p->sysctl = NULL;
4150 unregister_sysctl_table(t->sysctl_header);
4151 kfree(t->dev_name);
4152 kfree(t);
4153}
4154
f52295a9
PE		 4155static void addrconf_sysctl_register(struct inet6_dev *idev)
4156{
408c4768
PE		 4157 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4158 NET_IPV6_NEIGH, "ipv6",
4159 &ndisc_ifinfo_sysctl_change,
4160 NULL);
bff16c2f
PE		 4161 __addrconf_sysctl_register(idev->dev->nd_net, idev->dev->name,
4162 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4163}
4164
408c4768 4165static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4166{
408c4768
PE		 4167 __addrconf_sysctl_unregister(&idev->cnf);
4168 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4169}
4170
4171
4172#endif
4173
e0da5a48
PE		 4174static int addrconf_init_net(struct net *net)
4175{
4176 int err;
4177 struct ipv6_devconf *all, *dflt;
4178
4179 err = -ENOMEM;
4180 all = &ipv6_devconf;
4181 dflt = &ipv6_devconf_dflt;
4182
4183 if (net != &init_net) {
4184 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4185 if (all == NULL)
4186 goto err_alloc_all;
4187
4188 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4189 if (dflt == NULL)
4190 goto err_alloc_dflt;
4191 }
4192
4193 net->ipv6.devconf_all = all;
4194 net->ipv6.devconf_dflt = dflt;
4195
4196#ifdef CONFIG_SYSCTL
4197 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4198 NULL, all);
4199 if (err < 0)
4200 goto err_reg_all;
4201
4202 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4203 NULL, dflt);
4204 if (err < 0)
4205 goto err_reg_dflt;
4206#endif
4207 return 0;
4208
4209#ifdef CONFIG_SYSCTL
4210err_reg_dflt:
4211 __addrconf_sysctl_unregister(all);
4212err_reg_all:
4213 kfree(dflt);
4214#endif
4215err_alloc_dflt:
4216 kfree(all);
4217err_alloc_all:
4218 return err;
4219}
4220
4221static void addrconf_exit_net(struct net *net)
4222{
4223#ifdef CONFIG_SYSCTL
4224 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4225 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4226#endif
4227 if (net != &init_net) {
4228 kfree(net->ipv6.devconf_dflt);
4229 kfree(net->ipv6.devconf_all);
4230 }
4231}
4232
4233static struct pernet_operations addrconf_ops = {
4234 .init = addrconf_init_net,
4235 .exit = addrconf_exit_net,
4236};
4237
1da177e4
LT		 4238/*
4239 * Device notifier
4240 */
4241
4242int register_inet6addr_notifier(struct notifier_block *nb)
4243{
1ab1457c 4244 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4245}
4246
7159039a
YH		 4247EXPORT_SYMBOL(register_inet6addr_notifier);
4248
1da177e4
LT		 4249int unregister_inet6addr_notifier(struct notifier_block *nb)
4250{
1ab1457c 4251 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4252}
4253
7159039a
YH		 4254EXPORT_SYMBOL(unregister_inet6addr_notifier);
4255
1da177e4
LT		 4256/*
4257 * Init / cleanup code
4258 */
4259
4260int __init addrconf_init(void)
4261{
2a8cc6c8
YH		 4262 int err;
4263
4264 if ((err = ipv6_addr_label_init()) < 0) {
4265 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4266 err);
4267 return err;
4268 }
1da177e4 4269
e0da5a48
PE		 4270 register_pernet_subsys(&addrconf_ops);
4271
1da177e4
LT		 4272 /* The addrconf netdev notifier requires that loopback_dev
4273 * has it's ipv6 private information allocated and setup
4274 * before it can bring up and give link-local addresses
4275 * to other devices which are up.
4276 *
4277 * Unfortunately, loopback_dev is not necessarily the first
4278 * entry in the global dev_base list of net devices. In fact,
4279 * it is likely to be the very last entry on that list.
4280 * So this causes the notifier registry below to try and
4281 * give link-local addresses to all devices besides loopback_dev
4282 * first, then loopback_dev, which cases all the non-loopback_dev
4283 * devices to fail to get a link-local address.
4284 *
4285 * So, as a temporary fix, allocate the ipv6 structure for
4286 * loopback_dev first by hand.
4287 * Longer term, all of the dependencies ipv6 has upon the loopback
4288 * device and it being up should be removed.
4289 */
4290 rtnl_lock();
2774c7ab 4291 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4292 err = -ENOMEM;
4293 rtnl_unlock();
4294 if (err)
e0da5a48 4295 goto errlo;
1da177e4 4296
2774c7ab
EB		 4297 ip6_null_entry.u.dst.dev = init_net.loopback_dev;
4298 ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4299#ifdef CONFIG_IPV6_MULTIPLE_TABLES
2774c7ab
EB		 4300 ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
4301 ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
4302 ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
4303 ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4304#endif
c62dba90 4305
1da177e4
LT		 4306 register_netdevice_notifier(&ipv6_dev_notf);
4307
1da177e4 4308 addrconf_verify(0);
c127ea2c
TG		 4309
4310 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4311 if (err < 0)
4312 goto errout;
4313
4314 /* Only the first call to __rtnl_register can fail */
4315 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4316 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4317 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4318 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4319 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4320
2a8cc6c8
YH		 4321 ipv6_addr_label_rtnl_register();
4322
1da177e4 4323 return 0;
c127ea2c
TG		 4324errout:
4325 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4326errlo:
4327 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4328
4329 return err;
1da177e4
LT		 4330}
4331
09f7709f 4332void addrconf_cleanup(void)
1da177e4 4333{
1ab1457c 4334 struct net_device *dev;
1ab1457c 4335 struct inet6_ifaddr *ifa;
1da177e4
LT		 4336 int i;
4337
4338 unregister_netdevice_notifier(&ipv6_dev_notf);
4339
e0da5a48 4340 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4341
4342 rtnl_lock();
4343
4344 /*
4345 * clean dev list.
4346 */
4347
881d966b 4348 for_each_netdev(&init_net, dev) {
dffe4f04 4349 if (__in6_dev_get(dev) == NULL)
1da177e4
LT		 4350 continue;
4351 addrconf_ifdown(dev, 1);
4352 }
2774c7ab 4353 addrconf_ifdown(init_net.loopback_dev, 2);
1da177e4
LT		 4354
4355 /*
4356 * Check hash table.
4357 */
4358
4359 write_lock_bh(&addrconf_hash_lock);
4360 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4361 for (ifa=inet6_addr_lst[i]; ifa; ) {
4362 struct inet6_ifaddr *bifa;
4363
4364 bifa = ifa;
4365 ifa = ifa->lst_next;
4366 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4367 /* Do not free it; something is wrong.
4368 Now we can investigate it with debugger.
4369 */
4370 }
4371 }
4372 write_unlock_bh(&addrconf_hash_lock);
4373
4374 del_timer(&addr_chk_timer);
4375
4376 rtnl_unlock();
1da177e4 4377}
Clone of davem's net-next-2.6 tree