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[IPV6] ADDRCONF: Ensure disabling multicast RS even if privacy extensions are disabled.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17/*
18 * Changes:
19 *
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
23 * unload.
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
26 * packets.
27 * yoshfuji@USAGI : Fixed interval between DAD
28 * packets.
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
32 * support.
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
37 * seq_file.
b1cacb68
YH		 38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
40 * status etc.
1da177e4
LT		 41 */
42
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
1da177e4
LT		 47#include <linux/net.h>
48#include <linux/in6.h>
49#include <linux/netdevice.h>
1823730f 50#include <linux/if_addr.h>
1da177e4
LT		 51#include <linux/if_arp.h>
52#include <linux/if_arcnet.h>
53#include <linux/if_infiniband.h>
54#include <linux/route.h>
55#include <linux/inetdevice.h>
56#include <linux/init.h>
57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
5d620266 76#include <net/netlink.h>
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 373
b077d7ab
YH		 374#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
375 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
376 printk(KERN_INFO
377 "%s: Disabled Multicast RS\n",
378 dev->name);
379 ndev->cnf.rtr_solicits = 0;
380 }
381#endif
382
1da177e4 383#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 384 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 385 if ((dev->flags&IFF_LOOPBACK) ||
386 dev->type == ARPHRD_TUNNEL ||
0be669bb
JR		 387#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
388 dev->type == ARPHRD_SIT ||
389#endif
390 dev->type == ARPHRD_NONE) {
322f74a4
IO		 391 printk(KERN_INFO
392 "%s: Disabled Privacy Extensions\n",
393 dev->name);
394 ndev->cnf.use_tempaddr = -1;
395 } else {
396 in6_dev_hold(ndev);
397 ipv6_regen_rndid((unsigned long) ndev);
398 }
1da177e4
LT		 399#endif
400
f24e3d65 401 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 402 ndev->if_flags |= IF_READY;
403
322f74a4
IO		 404 ipv6_mc_init_dev(ndev);
405 ndev->tstamp = jiffies;
f52295a9 406 addrconf_sysctl_register(ndev);
30c4cf57
DS		 407 /* protected by rtnl_lock */
408 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 409
410 /* Join all-node multicast group */
411 ipv6_addr_all_nodes(&maddr);
412 ipv6_dev_mc_inc(dev, &maddr);
413
1da177e4
LT		 414 return ndev;
415}
416
417static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
418{
419 struct inet6_dev *idev;
420
421 ASSERT_RTNL();
422
423 if ((idev = __in6_dev_get(dev)) == NULL) {
424 if ((idev = ipv6_add_dev(dev)) == NULL)
425 return NULL;
426 }
c5e33bdd 427
1da177e4
LT		 428 if (dev->flags&IFF_UP)
429 ipv6_mc_up(idev);
430 return idev;
431}
432
433#ifdef CONFIG_SYSCTL
434static void dev_forward_change(struct inet6_dev *idev)
435{
436 struct net_device *dev;
437 struct inet6_ifaddr *ifa;
438 struct in6_addr addr;
439
440 if (!idev)
441 return;
442 dev = idev->dev;
443 if (dev && (dev->flags & IFF_MULTICAST)) {
444 ipv6_addr_all_routers(&addr);
1ab1457c 445
1da177e4
LT		 446 if (idev->cnf.forwarding)
447 ipv6_dev_mc_inc(dev, &addr);
448 else
449 ipv6_dev_mc_dec(dev, &addr);
450 }
451 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 452 if (ifa->flags&IFA_F_TENTATIVE)
453 continue;
1da177e4
LT		 454 if (idev->cnf.forwarding)
455 addrconf_join_anycast(ifa);
456 else
457 addrconf_leave_anycast(ifa);
458 }
459}
460
461
e186932b 462static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 463{
464 struct net_device *dev;
465 struct inet6_dev *idev;
466
467 read_lock(&dev_base_lock);
bff16c2f 468 for_each_netdev(net, dev) {
8814c4b5 469 rcu_read_lock();
1da177e4
LT		 470 idev = __in6_dev_get(dev);
471 if (idev) {
e186932b
PE		 472 int changed = (!idev->cnf.forwarding) ^ (!newf);
473 idev->cnf.forwarding = newf;
1da177e4
LT		 474 if (changed)
475 dev_forward_change(idev);
476 }
8814c4b5 477 rcu_read_unlock();
1da177e4
LT		 478 }
479 read_unlock(&dev_base_lock);
480}
c8fecf22
PE		 481
482static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
483{
bff16c2f
PE		 484 struct net *net;
485
486 net = (struct net *)table->extra2;
441fc2a2 487 if (p == &net->ipv6.devconf_dflt->forwarding)
c8fecf22
PE		 488 return;
489
e186932b
PE		 490 if (p == &net->ipv6.devconf_all->forwarding) {
491 __s32 newf = net->ipv6.devconf_all->forwarding;
492 net->ipv6.devconf_dflt->forwarding = newf;
493 addrconf_forward_change(net, newf);
c8fecf22
PE		 494 } else if ((!*p) ^ (!old))
495 dev_forward_change((struct inet6_dev *)table->extra1);
496
497 if (*p)
498 rt6_purge_dflt_routers();
499}
1da177e4
LT		 500#endif
501
502/* Nobody refers to this ifaddr, destroy it */
503
504void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
505{
506 BUG_TRAP(ifp->if_next==NULL);
507 BUG_TRAP(ifp->lst_next==NULL);
508#ifdef NET_REFCNT_DEBUG
509 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
510#endif
511
512 in6_dev_put(ifp->idev);
513
514 if (del_timer(&ifp->timer))
515 printk("Timer is still running, when freeing ifa=%p\n", ifp);
516
517 if (!ifp->dead) {
518 printk("Freeing alive inet6 address %p\n", ifp);
519 return;
520 }
521 dst_release(&ifp->rt->u.dst);
522
523 kfree(ifp);
524}
525
e55ffac6
BH		 526static void
527ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
528{
529 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 530 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 531
532 /*
533 * Each device address list is sorted in order of scope -
534 * global before linklocal.
535 */
536 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
537 ifap = &ifa->if_next) {
8a6ce0c0 538 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 539 break;
540 }
541
542 ifp->if_next = *ifap;
543 *ifap = ifp;
544}
545
1da177e4
LT		 546/* On success it returns ifp with increased reference count */
547
548static struct inet6_ifaddr *
549ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 550 int scope, u32 flags)
1da177e4
LT		 551{
552 struct inet6_ifaddr *ifa = NULL;
553 struct rt6_info *rt;
554 int hash;
555 int err = 0;
556
8814c4b5 557 rcu_read_lock_bh();
1da177e4
LT		 558 if (idev->dead) {
559 err = -ENODEV; /*XXX*/
560 goto out2;
561 }
562
563 write_lock(&addrconf_hash_lock);
564
565 /* Ignore adding duplicate addresses on an interface */
06bfe655 566 if (ipv6_chk_same_addr(&init_net, addr, idev->dev)) {
1da177e4
LT		 567 ADBG(("ipv6_add_addr: already assigned\n"));
568 err = -EEXIST;
569 goto out;
570 }
571
322f74a4 572 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 573
574 if (ifa == NULL) {
575 ADBG(("ipv6_add_addr: malloc failed\n"));
576 err = -ENOBUFS;
577 goto out;
578 }
579
580 rt = addrconf_dst_alloc(idev, addr, 0);
581 if (IS_ERR(rt)) {
582 err = PTR_ERR(rt);
583 goto out;
584 }
585
1da177e4
LT		 586 ipv6_addr_copy(&ifa->addr, addr);
587
588 spin_lock_init(&ifa->lock);
589 init_timer(&ifa->timer);
590 ifa->timer.data = (unsigned long) ifa;
591 ifa->scope = scope;
592 ifa->prefix_len = pfxlen;
593 ifa->flags = flags | IFA_F_TENTATIVE;
594 ifa->cstamp = ifa->tstamp = jiffies;
595
57f5f544
KF		 596 ifa->rt = rt;
597
95c385b4
NH		 598 /*
599 * part one of RFC 4429, section 3.3
600 * We should not configure an address as
601 * optimistic if we do not yet know the link
602 * layer address of our nexhop router
603 */
604
605 if (rt->rt6i_nexthop == NULL)
606 ifa->flags &= ~IFA_F_OPTIMISTIC;
607
1da177e4
LT		 608 ifa->idev = idev;
609 in6_dev_hold(idev);
610 /* For caller */
611 in6_ifa_hold(ifa);
612
613 /* Add to big hash table */
614 hash = ipv6_addr_hash(addr);
615
616 ifa->lst_next = inet6_addr_lst[hash];
617 inet6_addr_lst[hash] = ifa;
618 in6_ifa_hold(ifa);
619 write_unlock(&addrconf_hash_lock);
620
621 write_lock(&idev->lock);
622 /* Add to inet6_dev unicast addr list. */
e55ffac6 623 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 624
625#ifdef CONFIG_IPV6_PRIVACY
626 if (ifa->flags&IFA_F_TEMPORARY) {
627 ifa->tmp_next = idev->tempaddr_list;
628 idev->tempaddr_list = ifa;
629 in6_ifa_hold(ifa);
630 }
631#endif
632
1da177e4
LT		 633 in6_ifa_hold(ifa);
634 write_unlock(&idev->lock);
635out2:
8814c4b5 636 rcu_read_unlock_bh();
1da177e4 637
fd92833a 638 if (likely(err == 0))
e041c683 639 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 640 else {
641 kfree(ifa);
642 ifa = ERR_PTR(err);
643 }
644
645 return ifa;
646out:
647 write_unlock(&addrconf_hash_lock);
648 goto out2;
649}
650
651/* This function wants to get referenced ifp and releases it before return */
652
653static void ipv6_del_addr(struct inet6_ifaddr *ifp)
654{
655 struct inet6_ifaddr *ifa, **ifap;
656 struct inet6_dev *idev = ifp->idev;
657 int hash;
658 int deleted = 0, onlink = 0;
659 unsigned long expires = jiffies;
660
661 hash = ipv6_addr_hash(&ifp->addr);
662
663 ifp->dead = 1;
664
665 write_lock_bh(&addrconf_hash_lock);
666 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
667 ifap = &ifa->lst_next) {
668 if (ifa == ifp) {
669 *ifap = ifa->lst_next;
670 __in6_ifa_put(ifp);
671 ifa->lst_next = NULL;
672 break;
673 }
674 }
675 write_unlock_bh(&addrconf_hash_lock);
676
677 write_lock_bh(&idev->lock);
678#ifdef CONFIG_IPV6_PRIVACY
679 if (ifp->flags&IFA_F_TEMPORARY) {
680 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
681 ifap = &ifa->tmp_next) {
682 if (ifa == ifp) {
683 *ifap = ifa->tmp_next;
684 if (ifp->ifpub) {
685 in6_ifa_put(ifp->ifpub);
686 ifp->ifpub = NULL;
687 }
688 __in6_ifa_put(ifp);
689 ifa->tmp_next = NULL;
690 break;
691 }
692 }
693 }
694#endif
695
1d142804 696 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 697 if (ifa == ifp) {
698 *ifap = ifa->if_next;
699 __in6_ifa_put(ifp);
700 ifa->if_next = NULL;
701 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
702 break;
703 deleted = 1;
1d142804 704 continue;
1da177e4
LT		 705 } else if (ifp->flags & IFA_F_PERMANENT) {
706 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
707 ifp->prefix_len)) {
708 if (ifa->flags & IFA_F_PERMANENT) {
709 onlink = 1;
710 if (deleted)
711 break;
712 } else {
713 unsigned long lifetime;
714
715 if (!onlink)
716 onlink = -1;
717
718 spin_lock(&ifa->lock);
719 lifetime = min_t(unsigned long,
720 ifa->valid_lft, 0x7fffffffUL/HZ);
721 if (time_before(expires,
722 ifa->tstamp + lifetime * HZ))
723 expires = ifa->tstamp + lifetime * HZ;
724 spin_unlock(&ifa->lock);
725 }
726 }
727 }
1d142804 728 ifap = &ifa->if_next;
1da177e4
LT		 729 }
730 write_unlock_bh(&idev->lock);
731
732 ipv6_ifa_notify(RTM_DELADDR, ifp);
733
e041c683 734 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 735
736 addrconf_del_timer(ifp);
737
738 /*
739 * Purge or update corresponding prefix
740 *
741 * 1) we don't purge prefix here if address was not permanent.
742 * prefix is managed by its own lifetime.
743 * 2) if there're no addresses, delete prefix.
744 * 3) if there're still other permanent address(es),
745 * corresponding prefix is still permanent.
746 * 4) otherwise, update prefix lifetime to the
747 * longest valid lifetime among the corresponding
748 * addresses on the device.
749 * Note: subsequent RA will update lifetime.
750 *
751 * --yoshfuji
752 */
753 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
754 struct in6_addr prefix;
755 struct rt6_info *rt;
756
757 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
758 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
759
760 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
761 if (onlink == 0) {
e0a1ad73 762 ip6_del_rt(rt);
1da177e4
LT		 763 rt = NULL;
764 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
765 rt->rt6i_expires = expires;
766 rt->rt6i_flags |= RTF_EXPIRES;
767 }
768 }
769 dst_release(&rt->u.dst);
770 }
771
772 in6_ifa_put(ifp);
773}
774
775#ifdef CONFIG_IPV6_PRIVACY
776static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
777{
778 struct inet6_dev *idev = ifp->idev;
779 struct in6_addr addr, *tmpaddr;
780 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 781 unsigned long regen_advance;
1da177e4
LT		 782 int tmp_plen;
783 int ret = 0;
784 int max_addresses;
95c385b4 785 u32 addr_flags;
1da177e4
LT		 786
787 write_lock(&idev->lock);
788 if (ift) {
789 spin_lock_bh(&ift->lock);
790 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
791 spin_unlock_bh(&ift->lock);
792 tmpaddr = &addr;
793 } else {
794 tmpaddr = NULL;
795 }
796retry:
797 in6_dev_hold(idev);
798 if (idev->cnf.use_tempaddr <= 0) {
799 write_unlock(&idev->lock);
800 printk(KERN_INFO
801 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
802 in6_dev_put(idev);
803 ret = -1;
804 goto out;
805 }
806 spin_lock_bh(&ifp->lock);
807 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
808 idev->cnf.use_tempaddr = -1; /*XXX*/
809 spin_unlock_bh(&ifp->lock);
810 write_unlock(&idev->lock);
811 printk(KERN_WARNING
812 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
813 in6_dev_put(idev);
814 ret = -1;
815 goto out;
816 }
817 in6_ifa_hold(ifp);
818 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
819 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
820 spin_unlock_bh(&ifp->lock);
821 write_unlock(&idev->lock);
822 printk(KERN_WARNING
823 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
824 in6_ifa_put(ifp);
825 in6_dev_put(idev);
826 ret = -1;
827 goto out;
828 }
829 memcpy(&addr.s6_addr[8], idev->rndid, 8);
830 tmp_valid_lft = min_t(__u32,
831 ifp->valid_lft,
832 idev->cnf.temp_valid_lft);
1ab1457c
YH		 833 tmp_prefered_lft = min_t(__u32,
834 ifp->prefered_lft,
1da177e4
LT		 835 idev->cnf.temp_prefered_lft - desync_factor / HZ);
836 tmp_plen = ifp->prefix_len;
837 max_addresses = idev->cnf.max_addresses;
838 tmp_cstamp = ifp->cstamp;
839 tmp_tstamp = ifp->tstamp;
840 spin_unlock_bh(&ifp->lock);
841
eac55bf9
BB		 842 regen_advance = idev->cnf.regen_max_retry *
843 idev->cnf.dad_transmits *
844 idev->nd_parms->retrans_time / HZ;
1da177e4 845 write_unlock(&idev->lock);
95c385b4 846
eac55bf9
BB		 847 /* A temporary address is created only if this calculated Preferred
848 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
849 * an implementation must not create a temporary address with a zero
850 * Preferred Lifetime.
851 */
852 if (tmp_prefered_lft <= regen_advance) {
853 in6_ifa_put(ifp);
854 in6_dev_put(idev);
855 ret = -1;
856 goto out;
857 }
858
95c385b4
NH		 859 addr_flags = IFA_F_TEMPORARY;
860 /* set in addrconf_prefix_rcv() */
861 if (ifp->flags & IFA_F_OPTIMISTIC)
862 addr_flags |= IFA_F_OPTIMISTIC;
863
1da177e4 864 ift = !max_addresses ||
1ab1457c 865 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 866 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 867 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
868 addr_flags) : NULL;
1da177e4
LT		 869 if (!ift || IS_ERR(ift)) {
870 in6_ifa_put(ifp);
871 in6_dev_put(idev);
872 printk(KERN_INFO
873 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
874 tmpaddr = &addr;
875 write_lock(&idev->lock);
876 goto retry;
877 }
878
879 spin_lock_bh(&ift->lock);
880 ift->ifpub = ifp;
881 ift->valid_lft = tmp_valid_lft;
882 ift->prefered_lft = tmp_prefered_lft;
883 ift->cstamp = tmp_cstamp;
884 ift->tstamp = tmp_tstamp;
885 spin_unlock_bh(&ift->lock);
886
887 addrconf_dad_start(ift, 0);
888 in6_ifa_put(ift);
889 in6_dev_put(idev);
890out:
891 return ret;
892}
893#endif
894
895/*
072047e4 896 * Choose an appropriate source address (RFC3484)
1da177e4 897 */
072047e4
YH		 898struct ipv6_saddr_score {
899 int addr_type;
900 unsigned int attrs;
901 int matchlen;
0d27b427 902 int scope;
072047e4
YH		 903 unsigned int rule;
904};
905
906#define IPV6_SADDR_SCORE_LOCAL 0x0001
907#define IPV6_SADDR_SCORE_PREFERRED 0x0004
908#define IPV6_SADDR_SCORE_HOA 0x0008
909#define IPV6_SADDR_SCORE_OIF 0x0010
910#define IPV6_SADDR_SCORE_LABEL 0x0020
911#define IPV6_SADDR_SCORE_PRIVACY 0x0040
912
b6f99a21 913static inline int ipv6_saddr_preferred(int type)
1da177e4 914{
072047e4
YH		 915 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
916 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
917 return 1;
918 return 0;
1da177e4
LT		 919}
920
072047e4 921int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 922 struct in6_addr *daddr, struct in6_addr *saddr)
923{
072047e4
YH		 924 struct ipv6_saddr_score hiscore;
925 struct inet6_ifaddr *ifa_result = NULL;
926 int daddr_type = __ipv6_addr_type(daddr);
927 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
303065a8
YH		 928 int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0;
929 u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex);
072047e4 930 struct net_device *dev;
1da177e4 931
072047e4 932 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 933
072047e4 934 read_lock(&dev_base_lock);
8814c4b5 935 rcu_read_lock();
1da177e4 936
881d966b 937 for_each_netdev(&init_net, dev) {
072047e4
YH		 938 struct inet6_dev *idev;
939 struct inet6_ifaddr *ifa;
940
941 /* Rule 0: Candidate Source Address (section 4)
942 * - multicast and link-local destination address,
943 * the set of candidate source address MUST only
944 * include addresses assigned to interfaces
945 * belonging to the same link as the outgoing
946 * interface.
947 * (- For site-local destination addresses, the
948 * set of candidate source addresses MUST only
949 * include addresses assigned to interfaces
950 * belonging to the same site as the outgoing
951 * interface.)
952 */
953 if ((daddr_type & IPV6_ADDR_MULTICAST ||
954 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
955 daddr_dev && dev != daddr_dev)
956 continue;
1da177e4 957
1da177e4 958 idev = __in6_dev_get(dev);
072047e4
YH		 959 if (!idev)
960 continue;
961
962 read_lock_bh(&idev->lock);
963 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
964 struct ipv6_saddr_score score;
965
966 score.addr_type = __ipv6_addr_type(&ifa->addr);
967
6b3ae80a
YH		 968 /* Rule 0:
969 * - Tentative Address (RFC2462 section 5.4)
970 * - A tentative address is not considered
971 * "assigned to an interface" in the traditional
95c385b4 972 * sense, unless it is also flagged as optimistic.
6b3ae80a 973 * - Candidate Source Address (section 4)
072047e4
YH		 974 * - In any case, anycast addresses, multicast
975 * addresses, and the unspecified address MUST
976 * NOT be included in a candidate set.
977 */
95c385b4
NH		 978 if ((ifa->flags & IFA_F_TENTATIVE) &&
979 (!(ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 980 continue;
072047e4
YH		 981 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
982 score.addr_type & IPV6_ADDR_MULTICAST)) {
983 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 984 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 985 "assigned as unicast address on %s",
986 dev->name);
987 continue;
988 }
989
990 score.attrs = 0;
991 score.matchlen = 0;
992 score.scope = 0;
993 score.rule = 0;
994
995 if (ifa_result == NULL) {
996 /* record it if the first available entry */
997 goto record_it;
998 }
999
1000 /* Rule 1: Prefer same address */
1001 if (hiscore.rule < 1) {
1002 if (ipv6_addr_equal(&ifa_result->addr, daddr))
1003 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
1004 hiscore.rule++;
1005 }
1006 if (ipv6_addr_equal(&ifa->addr, daddr)) {
1007 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
1008 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
1009 score.rule = 1;
1010 goto record_it;
1da177e4 1011 }
072047e4
YH		 1012 } else {
1013 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
1014 continue;
1da177e4 1015 }
1da177e4 1016
072047e4
YH		 1017 /* Rule 2: Prefer appropriate scope */
1018 if (hiscore.rule < 2) {
1019 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1020 hiscore.rule++;
1021 }
1022 score.scope = __ipv6_addr_src_scope(score.addr_type);
1023 if (hiscore.scope < score.scope) {
1024 if (hiscore.scope < daddr_scope) {
1025 score.rule = 2;
1026 goto record_it;
1027 } else
1028 continue;
1029 } else if (score.scope < hiscore.scope) {
1030 if (score.scope < daddr_scope)
e55ffac6 1031 break; /* addresses sorted by scope */
072047e4
YH		 1032 else {
1033 score.rule = 2;
1034 goto record_it;
1035 }
1036 }
1da177e4 1037
95c385b4 1038 /* Rule 3: Avoid deprecated and optimistic addresses */
072047e4
YH		 1039 if (hiscore.rule < 3) {
1040 if (ipv6_saddr_preferred(hiscore.addr_type) ||
95c385b4
NH		 1041 (((ifa_result->flags &
1042 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
072047e4
YH		 1043 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1044 hiscore.rule++;
1045 }
1046 if (ipv6_saddr_preferred(score.addr_type) ||
6ae5f983 1047 (((ifa->flags &
95c385b4 1048 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
072047e4
YH		 1049 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1050 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1051 score.rule = 3;
1052 goto record_it;
1053 }
1054 } else {
1055 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1056 continue;
1057 }
1da177e4 1058
3b9f9a1c 1059 /* Rule 4: Prefer home address */
59fbb3a6 1060#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 1061 if (hiscore.rule < 4) {
1062 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1063 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1064 hiscore.rule++;
1065 }
1066 if (ifa->flags & IFA_F_HOMEADDRESS) {
1067 score.attrs |= IPV6_SADDR_SCORE_HOA;
1068 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1069 score.rule = 4;
1070 goto record_it;
1071 }
1072 } else {
1073 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1074 continue;
1075 }
1076#else
220bbd74
YH		 1077 if (hiscore.rule < 4)
1078 hiscore.rule++;
3b9f9a1c 1079#endif
072047e4
YH		 1080
1081 /* Rule 5: Prefer outgoing interface */
1082 if (hiscore.rule < 5) {
1083 if (daddr_dev == NULL ||
1084 daddr_dev == ifa_result->idev->dev)
1085 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1086 hiscore.rule++;
1087 }
1088 if (daddr_dev == NULL ||
1089 daddr_dev == ifa->idev->dev) {
1090 score.attrs |= IPV6_SADDR_SCORE_OIF;
1091 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1092 score.rule = 5;
1093 goto record_it;
1094 }
1095 } else {
1096 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1097 continue;
1098 }
1099
1100 /* Rule 6: Prefer matching label */
1101 if (hiscore.rule < 6) {
c1ee656c 1102 if (ipv6_addr_label(&ifa_result->addr,
303065a8
YH		 1103 hiscore.addr_type,
1104 ifa_result->idev->dev->ifindex) == daddr_label)
072047e4
YH		 1105 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1106 hiscore.rule++;
1107 }
c1ee656c 1108 if (ipv6_addr_label(&ifa->addr,
303065a8
YH		 1109 score.addr_type,
1110 ifa->idev->dev->ifindex) == daddr_label) {
072047e4
YH		 1111 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1112 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1113 score.rule = 6;
1114 goto record_it;
1da177e4 1115 }
072047e4
YH		 1116 } else {
1117 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1118 continue;
1119 }
1120
44fd0261 1121#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1122 /* Rule 7: Prefer public address
1123 * Note: prefer temprary address if use_tempaddr >= 2
1124 */
1125 if (hiscore.rule < 7) {
1126 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1127 (ifa_result->idev->cnf.use_tempaddr >= 2))
1128 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1129 hiscore.rule++;
1130 }
1131 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1132 (ifa->idev->cnf.use_tempaddr >= 2)) {
1133 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1134 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1135 score.rule = 7;
1136 goto record_it;
1137 }
1138 } else {
1139 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1140 continue;
1141 }
5e2707fa
YH		 1142#else
1143 if (hiscore.rule < 7)
1144 hiscore.rule++;
44fd0261 1145#endif
072047e4 1146 /* Rule 8: Use longest matching prefix */
12da2a43 1147 if (hiscore.rule < 8) {
072047e4 1148 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1149 hiscore.rule++;
1150 }
072047e4
YH		 1151 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1152 if (score.matchlen > hiscore.matchlen) {
1153 score.rule = 8;
1154 goto record_it;
1da177e4 1155 }
072047e4
YH		 1156#if 0
1157 else if (score.matchlen < hiscore.matchlen)
1158 continue;
1159#endif
1160
1161 /* Final Rule: choose first available one */
1162 continue;
1163record_it:
1164 if (ifa_result)
1165 in6_ifa_put(ifa_result);
1166 in6_ifa_hold(ifa);
1167 ifa_result = ifa;
1168 hiscore = score;
1da177e4 1169 }
072047e4 1170 read_unlock_bh(&idev->lock);
1da177e4 1171 }
8814c4b5 1172 rcu_read_unlock();
1da177e4
LT		 1173 read_unlock(&dev_base_lock);
1174
072047e4
YH		 1175 if (!ifa_result)
1176 return -EADDRNOTAVAIL;
1ab1457c 1177
072047e4
YH		 1178 ipv6_addr_copy(saddr, &ifa_result->addr);
1179 in6_ifa_put(ifa_result);
1180 return 0;
1da177e4
LT		 1181}
1182
1183
1184int ipv6_get_saddr(struct dst_entry *dst,
1185 struct in6_addr *daddr, struct in6_addr *saddr)
1186{
7a3025b1 1187 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1da177e4
LT		 1188}
1189
7159039a 1190EXPORT_SYMBOL(ipv6_get_saddr);
1da177e4 1191
95c385b4
NH		 1192int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1193 unsigned char banned_flags)
1da177e4
LT		 1194{
1195 struct inet6_dev *idev;
1196 int err = -EADDRNOTAVAIL;
1197
8814c4b5 1198 rcu_read_lock();
1da177e4
LT		 1199 if ((idev = __in6_dev_get(dev)) != NULL) {
1200 struct inet6_ifaddr *ifp;
1201
1202 read_lock_bh(&idev->lock);
1203 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1204 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1205 ipv6_addr_copy(addr, &ifp->addr);
1206 err = 0;
1207 break;
1208 }
1209 }
1210 read_unlock_bh(&idev->lock);
1211 }
8814c4b5 1212 rcu_read_unlock();
1da177e4
LT		 1213 return err;
1214}
1215
1216static int ipv6_count_addresses(struct inet6_dev *idev)
1217{
1218 int cnt = 0;
1219 struct inet6_ifaddr *ifp;
1220
1221 read_lock_bh(&idev->lock);
1222 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1223 cnt++;
1224 read_unlock_bh(&idev->lock);
1225 return cnt;
1226}
1227
bfeade08
DL		 1228int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1229 struct net_device *dev, int strict)
1da177e4
LT		 1230{
1231 struct inet6_ifaddr * ifp;
1232 u8 hash = ipv6_addr_hash(addr);
1233
1234 read_lock_bh(&addrconf_hash_lock);
1235 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
bfeade08
DL		 1236 if (ifp->idev->dev->nd_net != net)
1237 continue;
1da177e4
LT		 1238 if (ipv6_addr_equal(&ifp->addr, addr) &&
1239 !(ifp->flags&IFA_F_TENTATIVE)) {
1240 if (dev == NULL || ifp->idev->dev == dev ||
1241 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1242 break;
1243 }
1244 }
1245 read_unlock_bh(&addrconf_hash_lock);
1246 return ifp != NULL;
1247}
7159039a
YH		 1248EXPORT_SYMBOL(ipv6_chk_addr);
1249
1da177e4 1250static
06bfe655
DL		 1251int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1252 struct net_device *dev)
1da177e4
LT		 1253{
1254 struct inet6_ifaddr * ifp;
1255 u8 hash = ipv6_addr_hash(addr);
1256
1257 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
06bfe655
DL		 1258 if (ifp->idev->dev->nd_net != net)
1259 continue;
1da177e4
LT		 1260 if (ipv6_addr_equal(&ifp->addr, addr)) {
1261 if (dev == NULL || ifp->idev->dev == dev)
1262 break;
1263 }
1264 }
1265 return ifp != NULL;
1266}
1267
1cab3da6
DL		 1268struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr,
1269 struct net_device *dev, int strict)
1da177e4
LT		 1270{
1271 struct inet6_ifaddr * ifp;
1272 u8 hash = ipv6_addr_hash(addr);
1273
1274 read_lock_bh(&addrconf_hash_lock);
1275 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1cab3da6
DL		 1276 if (ifp->idev->dev->nd_net != net)
1277 continue;
1da177e4
LT		 1278 if (ipv6_addr_equal(&ifp->addr, addr)) {
1279 if (dev == NULL || ifp->idev->dev == dev ||
1280 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1281 in6_ifa_hold(ifp);
1282 break;
1283 }
1284 }
1285 }
1286 read_unlock_bh(&addrconf_hash_lock);
1287
1288 return ifp;
1289}
1290
1291int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1292{
1293 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1294 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1295 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1296 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1297 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1298 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1299 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1300 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1301
1302 if (!sk2_rcv_saddr && !sk_ipv6only)
1303 return 1;
1304
1305 if (addr_type2 == IPV6_ADDR_ANY &&
1306 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1307 return 1;
1308
1309 if (addr_type == IPV6_ADDR_ANY &&
1310 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1311 return 1;
1312
1313 if (sk2_rcv_saddr6 &&
1314 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1315 return 1;
1316
1317 if (addr_type == IPV6_ADDR_MAPPED &&
1318 !sk2_ipv6only &&
1319 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1320 return 1;
1321
1322 return 0;
1323}
1324
1325/* Gets referenced address, destroys ifaddr */
1326
9f5336e2 1327static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1328{
1da177e4
LT		 1329 if (ifp->flags&IFA_F_PERMANENT) {
1330 spin_lock_bh(&ifp->lock);
1331 addrconf_del_timer(ifp);
1332 ifp->flags |= IFA_F_TENTATIVE;
1333 spin_unlock_bh(&ifp->lock);
1334 in6_ifa_put(ifp);
1335#ifdef CONFIG_IPV6_PRIVACY
1336 } else if (ifp->flags&IFA_F_TEMPORARY) {
1337 struct inet6_ifaddr *ifpub;
1338 spin_lock_bh(&ifp->lock);
1339 ifpub = ifp->ifpub;
1340 if (ifpub) {
1341 in6_ifa_hold(ifpub);
1342 spin_unlock_bh(&ifp->lock);
1343 ipv6_create_tempaddr(ifpub, ifp);
1344 in6_ifa_put(ifpub);
1345 } else {
1346 spin_unlock_bh(&ifp->lock);
1347 }
1348 ipv6_del_addr(ifp);
1349#endif
1350 } else
1351 ipv6_del_addr(ifp);
1352}
1353
3c21edbd
YH		 1354void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1355{
1356 if (net_ratelimit())
1357 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1358 addrconf_dad_stop(ifp);
1359}
1da177e4
LT		 1360
1361/* Join to solicited addr multicast group. */
1362
1363void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1364{
1365 struct in6_addr maddr;
1366
1367 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1368 return;
1369
1370 addrconf_addr_solict_mult(addr, &maddr);
1371 ipv6_dev_mc_inc(dev, &maddr);
1372}
1373
1374void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1375{
1376 struct in6_addr maddr;
1377
1378 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1379 return;
1380
1381 addrconf_addr_solict_mult(addr, &maddr);
1382 __ipv6_dev_mc_dec(idev, &maddr);
1383}
1384
20380731 1385static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1386{
1387 struct in6_addr addr;
1388 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1389 if (ipv6_addr_any(&addr))
1390 return;
1391 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1392}
1393
20380731 1394static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1395{
1396 struct in6_addr addr;
1397 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1398 if (ipv6_addr_any(&addr))
1399 return;
1400 __ipv6_dev_ac_dec(ifp->idev, &addr);
1401}
1402
073a8e0e
YH		 1403static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1404{
1405 if (dev->addr_len != ETH_ALEN)
1406 return -1;
1407 memcpy(eui, dev->dev_addr, 3);
1408 memcpy(eui + 5, dev->dev_addr + 3, 3);
1409
1410 /*
1411 * The zSeries OSA network cards can be shared among various
1412 * OS instances, but the OSA cards have only one MAC address.
1413 * This leads to duplicate address conflicts in conjunction
1414 * with IPv6 if more than one instance uses the same card.
1415 *
1416 * The driver for these cards can deliver a unique 16-bit
1417 * identifier for each instance sharing the same card. It is
1418 * placed instead of 0xFFFE in the interface identifier. The
1419 * "u" bit of the interface identifier is not inverted in this
1420 * case. Hence the resulting interface identifier has local
1421 * scope according to RFC2373.
1422 */
1423 if (dev->dev_id) {
1424 eui[3] = (dev->dev_id >> 8) & 0xFF;
1425 eui[4] = dev->dev_id & 0xFF;
1426 } else {
1427 eui[3] = 0xFF;
1428 eui[4] = 0xFE;
1429 eui[0] ^= 2;
1430 }
1431 return 0;
1432}
1433
1434static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1435{
1436 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1437 if (dev->addr_len != ARCNET_ALEN)
1438 return -1;
1439 memset(eui, 0, 7);
1440 eui[7] = *(u8*)dev->dev_addr;
1441 return 0;
1442}
1443
1444static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1445{
1446 if (dev->addr_len != INFINIBAND_ALEN)
1447 return -1;
1448 memcpy(eui, dev->dev_addr + 12, 8);
1449 eui[0] |= 2;
1450 return 0;
1451}
1452
1da177e4
LT		 1453static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1454{
1455 switch (dev->type) {
1456 case ARPHRD_ETHER:
1457 case ARPHRD_FDDI:
1458 case ARPHRD_IEEE802_TR:
073a8e0e 1459 return addrconf_ifid_eui48(eui, dev);
1da177e4 1460 case ARPHRD_ARCNET:
073a8e0e 1461 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1462 case ARPHRD_INFINIBAND:
073a8e0e 1463 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0
FT		 1464 case ARPHRD_SIT:
1465 if (dev->priv_flags & IFF_ISATAP)
1466 return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr);
1da177e4
LT		 1467 }
1468 return -1;
1469}
1470
1471static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1472{
1473 int err = -1;
1474 struct inet6_ifaddr *ifp;
1475
1476 read_lock_bh(&idev->lock);
1477 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1478 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1479 memcpy(eui, ifp->addr.s6_addr+8, 8);
1480 err = 0;
1481 break;
1482 }
1483 }
1484 read_unlock_bh(&idev->lock);
1485 return err;
1486}
1487
1488#ifdef CONFIG_IPV6_PRIVACY
1489/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1490static int __ipv6_regen_rndid(struct inet6_dev *idev)
1491{
1da177e4 1492regen:
955189ef 1493 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1494 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1495
1496 /*
1497 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1498 * check if generated address is not inappropriate
1499 *
1500 * - Reserved subnet anycast (RFC 2526)
1501 * 11111101 11....11 1xxxxxxx
c7dc89c0 1502 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1503 * 00-00-5E-FE-xx-xx-xx-xx
1504 * - value 0
1505 * - XXX: already assigned to an address on the device
1506 */
1ab1457c 1507 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1508 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1509 (idev->rndid[7]&0x80))
1510 goto regen;
1511 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1512 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1513 goto regen;
1514 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1515 goto regen;
1516 }
1517
1518 return 0;
1519}
1520
1521static void ipv6_regen_rndid(unsigned long data)
1522{
1523 struct inet6_dev *idev = (struct inet6_dev *) data;
1524 unsigned long expires;
1525
8814c4b5 1526 rcu_read_lock_bh();
1da177e4
LT		 1527 write_lock_bh(&idev->lock);
1528
1529 if (idev->dead)
1530 goto out;
1531
1532 if (__ipv6_regen_rndid(idev) < 0)
1533 goto out;
1ab1457c 1534
1da177e4 1535 expires = jiffies +
1ab1457c 1536 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1537 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1538 if (time_before(expires, jiffies)) {
1539 printk(KERN_WARNING
1540 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1541 idev->dev->name);
1542 goto out;
1543 }
1544
1545 if (!mod_timer(&idev->regen_timer, expires))
1546 in6_dev_hold(idev);
1547
1548out:
1549 write_unlock_bh(&idev->lock);
8814c4b5 1550 rcu_read_unlock_bh();
1da177e4
LT		 1551 in6_dev_put(idev);
1552}
1553
1554static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1555 int ret = 0;
1556
1557 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1558 ret = __ipv6_regen_rndid(idev);
1559 return ret;
1560}
1561#endif
1562
1563/*
1564 * Add prefix route.
1565 */
1566
1567static void
1568addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1569 unsigned long expires, u32 flags)
1da177e4 1570{
86872cb5
TG		 1571 struct fib6_config cfg = {
1572 .fc_table = RT6_TABLE_PREFIX,
1573 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1574 .fc_ifindex = dev->ifindex,
1575 .fc_expires = expires,
1576 .fc_dst_len = plen,
1577 .fc_flags = RTF_UP | flags,
f1243c2d 1578 .fc_nlinfo.nl_net = &init_net,
86872cb5 1579 };
1da177e4 1580
86872cb5 1581 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1582
1583 /* Prevent useless cloning on PtP SIT.
1584 This thing is done here expecting that the whole
1585 class of non-broadcast devices need not cloning.
1586 */
0be669bb 1587#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1588 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1589 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1590#endif
1da177e4 1591
86872cb5 1592 ip6_route_add(&cfg);
1da177e4
LT		 1593}
1594
1595/* Create "default" multicast route to the interface */
1596
1597static void addrconf_add_mroute(struct net_device *dev)
1598{
86872cb5
TG		 1599 struct fib6_config cfg = {
1600 .fc_table = RT6_TABLE_LOCAL,
1601 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1602 .fc_ifindex = dev->ifindex,
1603 .fc_dst_len = 8,
1604 .fc_flags = RTF_UP,
f1243c2d 1605 .fc_nlinfo.nl_net = &init_net,
86872cb5
TG		 1606 };
1607
1608 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1609
1610 ip6_route_add(&cfg);
1da177e4
LT		 1611}
1612
0be669bb 1613#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1614static void sit_route_add(struct net_device *dev)
1615{
86872cb5
TG		 1616 struct fib6_config cfg = {
1617 .fc_table = RT6_TABLE_MAIN,
1618 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1619 .fc_ifindex = dev->ifindex,
1620 .fc_dst_len = 96,
1621 .fc_flags = RTF_UP | RTF_NONEXTHOP,
f1243c2d 1622 .fc_nlinfo.nl_net = &init_net,
86872cb5 1623 };
1da177e4
LT		 1624
1625 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1626 ip6_route_add(&cfg);
1da177e4 1627}
0be669bb 1628#endif
1da177e4
LT		 1629
1630static void addrconf_add_lroute(struct net_device *dev)
1631{
1632 struct in6_addr addr;
1633
1634 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1635 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1636}
1637
1638static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1639{
1640 struct inet6_dev *idev;
1641
1642 ASSERT_RTNL();
1643
1644 if ((idev = ipv6_find_idev(dev)) == NULL)
1645 return NULL;
1646
1647 /* Add default multicast route */
1648 addrconf_add_mroute(dev);
1649
1650 /* Add link local route */
1651 addrconf_add_lroute(dev);
1652 return idev;
1653}
1654
1655void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1656{
1657 struct prefix_info *pinfo;
1658 __u32 valid_lft;
1659 __u32 prefered_lft;
1660 int addr_type;
1661 unsigned long rt_expires;
1662 struct inet6_dev *in6_dev;
1663
1664 pinfo = (struct prefix_info *) opt;
1ab1457c 1665
1da177e4
LT		 1666 if (len < sizeof(struct prefix_info)) {
1667 ADBG(("addrconf: prefix option too short\n"));
1668 return;
1669 }
1ab1457c 1670
1da177e4
LT		 1671 /*
1672 * Validation checks ([ADDRCONF], page 19)
1673 */
1674
1675 addr_type = ipv6_addr_type(&pinfo->prefix);
1676
1677 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1678 return;
1679
1680 valid_lft = ntohl(pinfo->valid);
1681 prefered_lft = ntohl(pinfo->prefered);
1682
1683 if (prefered_lft > valid_lft) {
1684 if (net_ratelimit())
1685 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1686 return;
1687 }
1688
1689 in6_dev = in6_dev_get(dev);
1690
1691 if (in6_dev == NULL) {
1692 if (net_ratelimit())
1693 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1694 return;
1695 }
1696
1697 /*
1698 * Two things going on here:
1699 * 1) Add routes for on-link prefixes
1700 * 2) Configure prefixes with the auto flag set
1701 */
1702
1703 /* Avoid arithmetic overflow. Really, we could
1704 save rt_expires in seconds, likely valid_lft,
1705 but it would require division in fib gc, that it
1706 not good.
1707 */
1708 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1709 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1710 else
3dd4bc68
YH		 1711 rt_expires = valid_lft * HZ;
1712
1713 /*
1714 * We convert this (in jiffies) to clock_t later.
1715 * Avoid arithmetic overflow there as well.
1716 * Overflow can happen only if HZ < USER_HZ.
1717 */
1718 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1719 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1720
1721 if (pinfo->onlink) {
1722 struct rt6_info *rt;
1723 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1724
1725 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1726 if (rt->rt6i_flags&RTF_EXPIRES) {
1727 if (valid_lft == 0) {
e0a1ad73 1728 ip6_del_rt(rt);
1da177e4
LT		 1729 rt = NULL;
1730 } else {
3dd4bc68 1731 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1732 }
1733 }
1734 } else if (valid_lft) {
1735 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1736 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1737 }
1738 if (rt)
1739 dst_release(&rt->u.dst);
1740 }
1741
1742 /* Try to figure out our local address for this prefix */
1743
1744 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1745 struct inet6_ifaddr * ifp;
1746 struct in6_addr addr;
1747 int create = 0, update_lft = 0;
1748
1749 if (pinfo->prefix_len == 64) {
1750 memcpy(&addr, &pinfo->prefix, 8);
1751 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1752 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1753 in6_dev_put(in6_dev);
1754 return;
1755 }
1756 goto ok;
1757 }
1758 if (net_ratelimit())
1759 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1760 pinfo->prefix_len);
1761 in6_dev_put(in6_dev);
1762 return;
1763
1764ok:
1765
1cab3da6 1766 ifp = ipv6_get_ifaddr(&init_net, &addr, dev, 1);
1da177e4
LT		 1767
1768 if (ifp == NULL && valid_lft) {
1769 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1770 u32 addr_flags = 0;
1771
1772#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1773 if (in6_dev->cnf.optimistic_dad &&
1774 !ipv6_devconf.forwarding)
1775 addr_flags = IFA_F_OPTIMISTIC;
1776#endif
1da177e4
LT		 1777
1778 /* Do not allow to create too much of autoconfigured
1779 * addresses; this would be too easy way to crash kernel.
1780 */
1781 if (!max_addresses ||
1782 ipv6_count_addresses(in6_dev) < max_addresses)
1783 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1784 addr_type&IPV6_ADDR_SCOPE_MASK,
1785 addr_flags);
1da177e4
LT		 1786
1787 if (!ifp || IS_ERR(ifp)) {
1788 in6_dev_put(in6_dev);
1789 return;
1790 }
1791
1792 update_lft = create = 1;
1793 ifp->cstamp = jiffies;
1794 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1795 }
1796
1797 if (ifp) {
1798 int flags;
1799 unsigned long now;
1800#ifdef CONFIG_IPV6_PRIVACY
1801 struct inet6_ifaddr *ift;
1802#endif
1803 u32 stored_lft;
1804
1805 /* update lifetime (RFC2462 5.5.3 e) */
1806 spin_lock(&ifp->lock);
1807 now = jiffies;
1808 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1809 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1810 else
1811 stored_lft = 0;
1812 if (!update_lft && stored_lft) {
1813 if (valid_lft > MIN_VALID_LIFETIME ||
1814 valid_lft > stored_lft)
1815 update_lft = 1;
1816 else if (stored_lft <= MIN_VALID_LIFETIME) {
1817 /* valid_lft <= stored_lft is always true */
1818 /* XXX: IPsec */
1819 update_lft = 0;
1820 } else {
1821 valid_lft = MIN_VALID_LIFETIME;
1822 if (valid_lft < prefered_lft)
1823 prefered_lft = valid_lft;
1824 update_lft = 1;
1825 }
1826 }
1827
1828 if (update_lft) {
1829 ifp->valid_lft = valid_lft;
1830 ifp->prefered_lft = prefered_lft;
1831 ifp->tstamp = now;
1832 flags = ifp->flags;
1833 ifp->flags &= ~IFA_F_DEPRECATED;
1834 spin_unlock(&ifp->lock);
1835
1836 if (!(flags&IFA_F_TENTATIVE))
1837 ipv6_ifa_notify(0, ifp);
1838 } else
1839 spin_unlock(&ifp->lock);
1840
1841#ifdef CONFIG_IPV6_PRIVACY
1842 read_lock_bh(&in6_dev->lock);
1843 /* update all temporary addresses in the list */
1844 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1845 /*
1846 * When adjusting the lifetimes of an existing
1847 * temporary address, only lower the lifetimes.
1848 * Implementations must not increase the
1849 * lifetimes of an existing temporary address
1850 * when processing a Prefix Information Option.
1851 */
c6fbfac2
BB		 1852 if (ifp != ift->ifpub)
1853 continue;
1854
1da177e4
LT		 1855 spin_lock(&ift->lock);
1856 flags = ift->flags;
1857 if (ift->valid_lft > valid_lft &&
1858 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1859 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1860 if (ift->prefered_lft > prefered_lft &&
1861 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1862 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1863 spin_unlock(&ift->lock);
1864 if (!(flags&IFA_F_TENTATIVE))
1865 ipv6_ifa_notify(0, ift);
1866 }
1867
1868 if (create && in6_dev->cnf.use_tempaddr > 0) {
1869 /*
1870 * When a new public address is created as described in [ADDRCONF],
1871 * also create a new temporary address.
1872 */
1ab1457c 1873 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1874 ipv6_create_tempaddr(ifp, NULL);
1875 } else {
1876 read_unlock_bh(&in6_dev->lock);
1877 }
1878#endif
1879 in6_ifa_put(ifp);
1880 addrconf_verify(0);
1881 }
1882 }
1883 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1884 in6_dev_put(in6_dev);
1885}
1886
1887/*
1888 * Set destination address.
1889 * Special case for SIT interfaces where we create a new "virtual"
1890 * device.
1891 */
1892int addrconf_set_dstaddr(void __user *arg)
1893{
1894 struct in6_ifreq ireq;
1895 struct net_device *dev;
1896 int err = -EINVAL;
1897
1898 rtnl_lock();
1899
1900 err = -EFAULT;
1901 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1902 goto err_exit;
1903
881d966b 1904 dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex);
1da177e4
LT		 1905
1906 err = -ENODEV;
1907 if (dev == NULL)
1908 goto err_exit;
1909
0be669bb 1910#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1911 if (dev->type == ARPHRD_SIT) {
1912 struct ifreq ifr;
1913 mm_segment_t oldfs;
1914 struct ip_tunnel_parm p;
1915
1916 err = -EADDRNOTAVAIL;
1917 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1918 goto err_exit;
1919
1920 memset(&p, 0, sizeof(p));
1921 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1922 p.iph.saddr = 0;
1923 p.iph.version = 4;
1924 p.iph.ihl = 5;
1925 p.iph.protocol = IPPROTO_IPV6;
1926 p.iph.ttl = 64;
d20b3109 1927 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4
LT		 1928
1929 oldfs = get_fs(); set_fs(KERNEL_DS);
1930 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1931 set_fs(oldfs);
1932
1933 if (err == 0) {
1934 err = -ENOBUFS;
881d966b 1935 if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL)
1da177e4
LT		 1936 goto err_exit;
1937 err = dev_open(dev);
1938 }
1939 }
0be669bb 1940#endif
1da177e4
LT		 1941
1942err_exit:
1943 rtnl_unlock();
1944 return err;
1945}
1946
1947/*
1948 * Manual configuration of address on an interface
1949 */
0778769d 1950static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
55ebaef1 1951 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1da177e4
LT		 1952{
1953 struct inet6_ifaddr *ifp;
1954 struct inet6_dev *idev;
1955 struct net_device *dev;
1956 int scope;
46d48046 1957 u32 flags = RTF_EXPIRES;
1da177e4
LT		 1958
1959 ASSERT_RTNL();
1ab1457c 1960
0778769d
NT		 1961 /* check the lifetime */
1962 if (!valid_lft || prefered_lft > valid_lft)
1963 return -EINVAL;
1964
881d966b 1965 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4 1966 return -ENODEV;
1ab1457c 1967
1da177e4
LT		 1968 if ((idev = addrconf_add_dev(dev)) == NULL)
1969 return -ENOBUFS;
1970
1971 scope = ipv6_addr_scope(pfx);
1972
46d48046 1973 if (valid_lft == INFINITY_LIFE_TIME) {
0778769d 1974 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 1975 flags = 0;
1976 } else if (valid_lft >= 0x7FFFFFFF/HZ)
0778769d
NT		 1977 valid_lft = 0x7FFFFFFF/HZ;
1978
1979 if (prefered_lft == 0)
1980 ifa_flags |= IFA_F_DEPRECATED;
1981 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1982 (prefered_lft != INFINITY_LIFE_TIME))
1983 prefered_lft = 0x7FFFFFFF/HZ;
1984
1985 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1986
1da177e4 1987 if (!IS_ERR(ifp)) {
06aebfb7 1988 spin_lock_bh(&ifp->lock);
0778769d
NT		 1989 ifp->valid_lft = valid_lft;
1990 ifp->prefered_lft = prefered_lft;
1991 ifp->tstamp = jiffies;
06aebfb7 1992 spin_unlock_bh(&ifp->lock);
0778769d 1993
46d48046
YH		 1994 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1995 jiffies_to_clock_t(valid_lft * HZ), flags);
95c385b4
NH		 1996 /*
1997 * Note that section 3.1 of RFC 4429 indicates
1998 * that the Optimistic flag should not be set for
1999 * manually configured addresses
2000 */
1da177e4
LT		 2001 addrconf_dad_start(ifp, 0);
2002 in6_ifa_put(ifp);
0778769d 2003 addrconf_verify(0);
1da177e4
LT		 2004 return 0;
2005 }
2006
2007 return PTR_ERR(ifp);
2008}
2009
2010static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
2011{
2012 struct inet6_ifaddr *ifp;
2013 struct inet6_dev *idev;
2014 struct net_device *dev;
1ab1457c 2015
881d966b 2016 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4
LT		 2017 return -ENODEV;
2018
2019 if ((idev = __in6_dev_get(dev)) == NULL)
2020 return -ENXIO;
2021
2022 read_lock_bh(&idev->lock);
2023 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2024 if (ifp->prefix_len == plen &&
2025 ipv6_addr_equal(pfx, &ifp->addr)) {
2026 in6_ifa_hold(ifp);
2027 read_unlock_bh(&idev->lock);
1ab1457c 2028
1da177e4
LT		 2029 ipv6_del_addr(ifp);
2030
2031 /* If the last address is deleted administratively,
2032 disable IPv6 on this interface.
2033 */
2034 if (idev->addr_list == NULL)
2035 addrconf_ifdown(idev->dev, 1);
2036 return 0;
2037 }
2038 }
2039 read_unlock_bh(&idev->lock);
2040 return -EADDRNOTAVAIL;
2041}
2042
2043
2044int addrconf_add_ifaddr(void __user *arg)
2045{
2046 struct in6_ifreq ireq;
2047 int err;
1ab1457c 2048
1da177e4
LT		 2049 if (!capable(CAP_NET_ADMIN))
2050 return -EPERM;
1ab1457c 2051
1da177e4
LT		 2052 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2053 return -EFAULT;
2054
2055 rtnl_lock();
0778769d 2056 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
55ebaef1 2057 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2058 rtnl_unlock();
2059 return err;
2060}
2061
2062int addrconf_del_ifaddr(void __user *arg)
2063{
2064 struct in6_ifreq ireq;
2065 int err;
1ab1457c 2066
1da177e4
LT		 2067 if (!capable(CAP_NET_ADMIN))
2068 return -EPERM;
2069
2070 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2071 return -EFAULT;
2072
2073 rtnl_lock();
2074 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2075 rtnl_unlock();
2076 return err;
2077}
2078
0be669bb 2079#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2080static void sit_add_v4_addrs(struct inet6_dev *idev)
2081{
2082 struct inet6_ifaddr * ifp;
2083 struct in6_addr addr;
2084 struct net_device *dev;
2085 int scope;
2086
2087 ASSERT_RTNL();
2088
2089 memset(&addr, 0, sizeof(struct in6_addr));
2090 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2091
2092 if (idev->dev->flags&IFF_POINTOPOINT) {
2093 addr.s6_addr32[0] = htonl(0xfe800000);
2094 scope = IFA_LINK;
2095 } else {
2096 scope = IPV6_ADDR_COMPATv4;
2097 }
2098
2099 if (addr.s6_addr32[3]) {
2100 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2101 if (!IS_ERR(ifp)) {
2102 spin_lock_bh(&ifp->lock);
2103 ifp->flags &= ~IFA_F_TENTATIVE;
2104 spin_unlock_bh(&ifp->lock);
2105 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2106 in6_ifa_put(ifp);
2107 }
2108 return;
2109 }
2110
881d966b 2111 for_each_netdev(&init_net, dev) {
e5ed6399 2112 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2113 if (in_dev && (dev->flags & IFF_UP)) {
2114 struct in_ifaddr * ifa;
2115
2116 int flag = scope;
2117
2118 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2119 int plen;
2120
2121 addr.s6_addr32[3] = ifa->ifa_local;
2122
2123 if (ifa->ifa_scope == RT_SCOPE_LINK)
2124 continue;
2125 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2126 if (idev->dev->flags&IFF_POINTOPOINT)
2127 continue;
2128 flag |= IFA_HOST;
2129 }
2130 if (idev->dev->flags&IFF_POINTOPOINT)
2131 plen = 64;
2132 else
2133 plen = 96;
2134
2135 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2136 IFA_F_PERMANENT);
2137 if (!IS_ERR(ifp)) {
2138 spin_lock_bh(&ifp->lock);
2139 ifp->flags &= ~IFA_F_TENTATIVE;
2140 spin_unlock_bh(&ifp->lock);
2141 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2142 in6_ifa_put(ifp);
2143 }
2144 }
2145 }
1ab1457c 2146 }
1da177e4 2147}
0be669bb 2148#endif
1da177e4
LT		 2149
2150static void init_loopback(struct net_device *dev)
2151{
2152 struct inet6_dev *idev;
2153 struct inet6_ifaddr * ifp;
2154
2155 /* ::1 */
2156
2157 ASSERT_RTNL();
2158
2159 if ((idev = ipv6_find_idev(dev)) == NULL) {
2160 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2161 return;
2162 }
2163
2164 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2165 if (!IS_ERR(ifp)) {
2166 spin_lock_bh(&ifp->lock);
2167 ifp->flags &= ~IFA_F_TENTATIVE;
2168 spin_unlock_bh(&ifp->lock);
2169 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2170 in6_ifa_put(ifp);
2171 }
2172}
2173
2174static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2175{
2176 struct inet6_ifaddr * ifp;
95c385b4
NH		 2177 u32 addr_flags = IFA_F_PERMANENT;
2178
2179#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2180 if (idev->cnf.optimistic_dad &&
2181 !ipv6_devconf.forwarding)
2182 addr_flags |= IFA_F_OPTIMISTIC;
2183#endif
1da177e4 2184
95c385b4
NH		 2185
2186 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2187 if (!IS_ERR(ifp)) {
46d48046 2188 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2189 addrconf_dad_start(ifp, 0);
2190 in6_ifa_put(ifp);
2191 }
2192}
2193
2194static void addrconf_dev_config(struct net_device *dev)
2195{
2196 struct in6_addr addr;
2197 struct inet6_dev * idev;
2198
2199 ASSERT_RTNL();
2200
74235a25
HX		 2201 if ((dev->type != ARPHRD_ETHER) &&
2202 (dev->type != ARPHRD_FDDI) &&
2203 (dev->type != ARPHRD_IEEE802_TR) &&
2204 (dev->type != ARPHRD_ARCNET) &&
2205 (dev->type != ARPHRD_INFINIBAND)) {
2206 /* Alas, we support only Ethernet autoconfiguration. */
2207 return;
2208 }
2209
1da177e4
LT		 2210 idev = addrconf_add_dev(dev);
2211 if (idev == NULL)
2212 return;
2213
2214 memset(&addr, 0, sizeof(struct in6_addr));
2215 addr.s6_addr32[0] = htonl(0xFE800000);
2216
2217 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2218 addrconf_add_linklocal(idev, &addr);
2219}
2220
0be669bb 2221#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2222static void addrconf_sit_config(struct net_device *dev)
2223{
2224 struct inet6_dev *idev;
2225
2226 ASSERT_RTNL();
2227
1ab1457c
YH		 2228 /*
2229 * Configure the tunnel with one of our IPv4
2230 * addresses... we should configure all of
1da177e4
LT		 2231 * our v4 addrs in the tunnel
2232 */
2233
2234 if ((idev = ipv6_find_idev(dev)) == NULL) {
2235 printk(KERN_DEBUG "init sit: add_dev failed\n");
2236 return;
2237 }
2238
c7dc89c0
FT		 2239 if (dev->priv_flags & IFF_ISATAP) {
2240 struct in6_addr addr;
2241
2242 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2243 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2244 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2245 addrconf_add_linklocal(idev, &addr);
2246 return;
2247 }
2248
1da177e4
LT		 2249 sit_add_v4_addrs(idev);
2250
2251 if (dev->flags&IFF_POINTOPOINT) {
2252 addrconf_add_mroute(dev);
2253 addrconf_add_lroute(dev);
2254 } else
2255 sit_route_add(dev);
2256}
0be669bb 2257#endif
1da177e4
LT		 2258
2259static inline int
2260ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2261{
2262 struct in6_addr lladdr;
2263
95c385b4 2264 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2265 addrconf_add_linklocal(idev, &lladdr);
2266 return 0;
2267 }
2268 return -1;
2269}
2270
2271static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2272{
2273 struct net_device *link_dev;
2274
2275 /* first try to inherit the link-local address from the link device */
2276 if (idev->dev->iflink &&
881d966b 2277 (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) {
1da177e4
LT		 2278 if (!ipv6_inherit_linklocal(idev, link_dev))
2279 return;
2280 }
2281 /* then try to inherit it from any device */
881d966b 2282 for_each_netdev(&init_net, link_dev) {
1da177e4
LT		 2283 if (!ipv6_inherit_linklocal(idev, link_dev))
2284 return;
2285 }
2286 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2287}
2288
2289/*
2290 * Autoconfigure tunnel with a link-local address so routing protocols,
2291 * DHCPv6, MLD etc. can be run over the virtual link
2292 */
2293
2294static void addrconf_ip6_tnl_config(struct net_device *dev)
2295{
2296 struct inet6_dev *idev;
2297
2298 ASSERT_RTNL();
2299
2300 if ((idev = addrconf_add_dev(dev)) == NULL) {
2301 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2302 return;
2303 }
2304 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2305}
2306
1ab1457c 2307static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2308 void * data)
2309{
2310 struct net_device *dev = (struct net_device *) data;
74235a25 2311 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2312 int run_pending = 0;
b217d616 2313 int err;
1da177e4 2314
e9dc8653
EB		 2315 if (dev->nd_net != &init_net)
2316 return NOTIFY_DONE;
2317
1da177e4 2318 switch(event) {
45ba9dd2 2319 case NETDEV_REGISTER:
74235a25 2320 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2321 idev = ipv6_add_dev(dev);
2322 if (!idev)
b217d616 2323 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2324 }
2325 break;
1da177e4 2326 case NETDEV_UP:
3c21edbd 2327 case NETDEV_CHANGE:
c2edacf8
JV		 2328 if (dev->flags & IFF_SLAVE)
2329 break;
2330
3c21edbd 2331 if (event == NETDEV_UP) {
f24e3d65 2332 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2333 /* device is not ready yet. */
2334 printk(KERN_INFO
2335 "ADDRCONF(NETDEV_UP): %s: "
2336 "link is not ready\n",
2337 dev->name);
2338 break;
2339 }
99081049 2340
d31c7b8f
EP		 2341 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2342 idev = ipv6_add_dev(dev);
2343
99081049
KS		 2344 if (idev)
2345 idev->if_flags |= IF_READY;
3c21edbd 2346 } else {
f24e3d65 2347 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2348 /* device is still not ready. */
2349 break;
2350 }
2351
2352 if (idev) {
2353 if (idev->if_flags & IF_READY) {
2354 /* device is already configured. */
2355 break;
2356 }
2357 idev->if_flags |= IF_READY;
2358 }
2359
2360 printk(KERN_INFO
2361 "ADDRCONF(NETDEV_CHANGE): %s: "
2362 "link becomes ready\n",
2363 dev->name);
2364
c5e33bdd 2365 run_pending = 1;
3c21edbd
YH		 2366 }
2367
1da177e4 2368 switch(dev->type) {
0be669bb 2369#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2370 case ARPHRD_SIT:
2371 addrconf_sit_config(dev);
2372 break;
0be669bb 2373#endif
1da177e4
LT		 2374 case ARPHRD_TUNNEL6:
2375 addrconf_ip6_tnl_config(dev);
2376 break;
2377 case ARPHRD_LOOPBACK:
2378 init_loopback(dev);
2379 break;
2380
2381 default:
2382 addrconf_dev_config(dev);
2383 break;
3ff50b79 2384 }
1da177e4 2385 if (idev) {
c5e33bdd
YH		 2386 if (run_pending)
2387 addrconf_dad_run(idev);
2388
1da177e4
LT		 2389 /* If the MTU changed during the interface down, when the
2390 interface up, the changed MTU must be reflected in the
2391 idev as well as routers.
2392 */
2393 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2394 rt6_mtu_change(dev, dev->mtu);
2395 idev->cnf.mtu6 = dev->mtu;
2396 }
2397 idev->tstamp = jiffies;
2398 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2399 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2400 stop IPv6 on this interface.
2401 */
2402 if (dev->mtu < IPV6_MIN_MTU)
2403 addrconf_ifdown(dev, event != NETDEV_DOWN);
2404 }
2405 break;
2406
2407 case NETDEV_CHANGEMTU:
d31c7b8f 2408 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2409 rt6_mtu_change(dev, dev->mtu);
2410 idev->cnf.mtu6 = dev->mtu;
2411 break;
2412 }
2413
d31c7b8f
EP		 2414 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2415 idev = ipv6_add_dev(dev);
2416 if (idev)
2417 break;
2418 }
2419
1da177e4
LT		 2420 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2421
2422 case NETDEV_DOWN:
2423 case NETDEV_UNREGISTER:
2424 /*
2425 * Remove all addresses from this interface.
2426 */
2427 addrconf_ifdown(dev, event != NETDEV_DOWN);
2428 break;
3c21edbd 2429
1da177e4 2430 case NETDEV_CHANGENAME:
1da177e4 2431 if (idev) {
5632c515 2432 snmp6_unregister_dev(idev);
408c4768 2433 addrconf_sysctl_unregister(idev);
f52295a9 2434 addrconf_sysctl_register(idev);
b217d616
HX		 2435 err = snmp6_register_dev(idev);
2436 if (err)
2437 return notifier_from_errno(err);
5632c515 2438 }
1da177e4 2439 break;
3ff50b79 2440 }
1da177e4
LT		 2441
2442 return NOTIFY_OK;
2443}
2444
2445/*
2446 * addrconf module should be notified of a device going up
2447 */
2448static struct notifier_block ipv6_dev_notf = {
2449 .notifier_call = addrconf_notify,
2450 .priority = 0
2451};
2452
2453static int addrconf_ifdown(struct net_device *dev, int how)
2454{
2455 struct inet6_dev *idev;
2456 struct inet6_ifaddr *ifa, **bifa;
2457 int i;
2458
2459 ASSERT_RTNL();
2460
eb867579 2461 if ((dev->flags & IFF_LOOPBACK) && how == 1)
1da177e4
LT		 2462 how = 0;
2463
2464 rt6_ifdown(dev);
2465 neigh_ifdown(&nd_tbl, dev);
2466
2467 idev = __in6_dev_get(dev);
2468 if (idev == NULL)
2469 return -ENODEV;
2470
2471 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2472 Do not dev_put!
1da177e4 2473 */
439e2385 2474 if (how) {
1da177e4 2475 idev->dead = 1;
8814c4b5
YH		 2476
2477 /* protected by rtnl_lock */
2478 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2479
2480 /* Step 1.5: remove snmp6 entry */
2481 snmp6_unregister_dev(idev);
2482
2483 }
2484
2485 /* Step 2: clear hash table */
2486 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2487 bifa = &inet6_addr_lst[i];
2488
2489 write_lock_bh(&addrconf_hash_lock);
2490 while ((ifa = *bifa) != NULL) {
2491 if (ifa->idev == idev) {
2492 *bifa = ifa->lst_next;
2493 ifa->lst_next = NULL;
2494 addrconf_del_timer(ifa);
2495 in6_ifa_put(ifa);
2496 continue;
2497 }
2498 bifa = &ifa->lst_next;
2499 }
2500 write_unlock_bh(&addrconf_hash_lock);
2501 }
2502
2503 write_lock_bh(&idev->lock);
2504
2505 /* Step 3: clear flags for stateless addrconf */
439e2385 2506 if (!how)
3c21edbd 2507 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2508
2509 /* Step 4: clear address list */
2510#ifdef CONFIG_IPV6_PRIVACY
439e2385 2511 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2512 in6_dev_put(idev);
2513
2514 /* clear tempaddr list */
2515 while ((ifa = idev->tempaddr_list) != NULL) {
2516 idev->tempaddr_list = ifa->tmp_next;
2517 ifa->tmp_next = NULL;
2518 ifa->dead = 1;
2519 write_unlock_bh(&idev->lock);
2520 spin_lock_bh(&ifa->lock);
2521
2522 if (ifa->ifpub) {
2523 in6_ifa_put(ifa->ifpub);
2524 ifa->ifpub = NULL;
2525 }
2526 spin_unlock_bh(&ifa->lock);
2527 in6_ifa_put(ifa);
2528 write_lock_bh(&idev->lock);
2529 }
2530#endif
2531 while ((ifa = idev->addr_list) != NULL) {
2532 idev->addr_list = ifa->if_next;
2533 ifa->if_next = NULL;
2534 ifa->dead = 1;
2535 addrconf_del_timer(ifa);
2536 write_unlock_bh(&idev->lock);
2537
2538 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2539 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2540 in6_ifa_put(ifa);
2541
2542 write_lock_bh(&idev->lock);
2543 }
2544 write_unlock_bh(&idev->lock);
2545
2546 /* Step 5: Discard multicast list */
2547
439e2385 2548 if (how)
1da177e4
LT		 2549 ipv6_mc_destroy_dev(idev);
2550 else
2551 ipv6_mc_down(idev);
2552
1da177e4 2553 idev->tstamp = jiffies;
1ab1457c 2554
1da177e4
LT		 2555 /* Shot the device (if unregistered) */
2556
439e2385 2557 if (how) {
408c4768 2558 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2559 neigh_parms_release(&nd_tbl, idev->nd_parms);
2560 neigh_ifdown(&nd_tbl, dev);
2561 in6_dev_put(idev);
2562 }
2563 return 0;
2564}
2565
2566static void addrconf_rs_timer(unsigned long data)
2567{
2568 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2569
2570 if (ifp->idev->cnf.forwarding)
2571 goto out;
2572
2573 if (ifp->idev->if_flags & IF_RA_RCVD) {
2574 /*
2575 * Announcement received after solicitation
2576 * was sent
2577 */
2578 goto out;
2579 }
2580
2581 spin_lock(&ifp->lock);
2582 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2583 struct in6_addr all_routers;
2584
2585 /* The wait after the last probe can be shorter */
2586 addrconf_mod_timer(ifp, AC_RS,
2587 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2588 ifp->idev->cnf.rtr_solicit_delay :
2589 ifp->idev->cnf.rtr_solicit_interval);
2590 spin_unlock(&ifp->lock);
2591
2592 ipv6_addr_all_routers(&all_routers);
2593
2594 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2595 } else {
2596 spin_unlock(&ifp->lock);
2597 /*
2598 * Note: we do not support deprecated "all on-link"
2599 * assumption any longer.
2600 */
2601 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2602 ifp->idev->dev->name);
2603 }
2604
2605out:
2606 in6_ifa_put(ifp);
2607}
2608
2609/*
2610 * Duplicate Address Detection
2611 */
3c21edbd
YH		 2612static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2613{
2614 unsigned long rand_num;
2615 struct inet6_dev *idev = ifp->idev;
2616
95c385b4
NH		 2617 if (ifp->flags & IFA_F_OPTIMISTIC)
2618 rand_num = 0;
2619 else
2620 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2621
3c21edbd
YH		 2622 ifp->probes = idev->cnf.dad_transmits;
2623 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2624}
2625
e431b8c0 2626static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2627{
2628 struct inet6_dev *idev = ifp->idev;
2629 struct net_device *dev = idev->dev;
1da177e4
LT		 2630
2631 addrconf_join_solict(dev, &ifp->addr);
2632
1da177e4 2633 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2634
2635 read_lock_bh(&idev->lock);
2636 if (ifp->dead)
2637 goto out;
2638 spin_lock_bh(&ifp->lock);
2639
2640 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
55ebaef1
NT		 2641 !(ifp->flags&IFA_F_TENTATIVE) ||
2642 ifp->flags & IFA_F_NODAD) {
95c385b4 2643 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2644 spin_unlock_bh(&ifp->lock);
2645 read_unlock_bh(&idev->lock);
2646
2647 addrconf_dad_completed(ifp);
2648 return;
2649 }
2650
6732bade 2651 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2652 spin_unlock_bh(&ifp->lock);
6732bade 2653 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2654 /*
2655 * If the defice is not ready:
2656 * - keep it tentative if it is a permanent address.
2657 * - otherwise, kill it.
2658 */
2659 in6_ifa_hold(ifp);
2660 addrconf_dad_stop(ifp);
6732bade 2661 return;
3c21edbd 2662 }
95c385b4
NH		 2663
2664 /*
2665 * Optimistic nodes can start receiving
2666 * Frames right away
2667 */
2668 if(ifp->flags & IFA_F_OPTIMISTIC)
2669 ip6_ins_rt(ifp->rt);
2670
6732bade
YH		 2671 addrconf_dad_kick(ifp);
2672 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2673out:
2674 read_unlock_bh(&idev->lock);
2675}
2676
2677static void addrconf_dad_timer(unsigned long data)
2678{
2679 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2680 struct inet6_dev *idev = ifp->idev;
2681 struct in6_addr unspec;
2682 struct in6_addr mcaddr;
2683
2684 read_lock_bh(&idev->lock);
2685 if (idev->dead) {
2686 read_unlock_bh(&idev->lock);
2687 goto out;
2688 }
2689 spin_lock_bh(&ifp->lock);
2690 if (ifp->probes == 0) {
2691 /*
2692 * DAD was successful
2693 */
2694
95c385b4 2695 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2696 spin_unlock_bh(&ifp->lock);
2697 read_unlock_bh(&idev->lock);
2698
2699 addrconf_dad_completed(ifp);
2700
2701 goto out;
2702 }
2703
2704 ifp->probes--;
2705 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2706 spin_unlock_bh(&ifp->lock);
2707 read_unlock_bh(&idev->lock);
2708
2709 /* send a neighbour solicitation for our addr */
2710 memset(&unspec, 0, sizeof(unspec));
2711 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2712 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2713out:
2714 in6_ifa_put(ifp);
2715}
2716
2717static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2718{
2719 struct net_device * dev = ifp->idev->dev;
2720
2721 /*
2722 * Configure the address for reception. Now it is valid.
2723 */
2724
2725 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2726
2727 /* If added prefix is link local and forwarding is off,
2728 start sending router solicitations.
2729 */
2730
2731 if (ifp->idev->cnf.forwarding == 0 &&
2732 ifp->idev->cnf.rtr_solicits > 0 &&
2733 (dev->flags&IFF_LOOPBACK) == 0 &&
2734 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2735 struct in6_addr all_routers;
2736
2737 ipv6_addr_all_routers(&all_routers);
2738
2739 /*
2740 * If a host as already performed a random delay
2741 * [...] as part of DAD [...] there is no need
2742 * to delay again before sending the first RS
2743 */
2744 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2745
2746 spin_lock_bh(&ifp->lock);
2747 ifp->probes = 1;
2748 ifp->idev->if_flags |= IF_RS_SENT;
2749 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2750 spin_unlock_bh(&ifp->lock);
2751 }
2752}
2753
c5e33bdd
YH		 2754static void addrconf_dad_run(struct inet6_dev *idev) {
2755 struct inet6_ifaddr *ifp;
2756
2757 read_lock_bh(&idev->lock);
2758 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2759 spin_lock_bh(&ifp->lock);
2760 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2761 spin_unlock_bh(&ifp->lock);
2762 continue;
2763 }
2764 spin_unlock_bh(&ifp->lock);
2765 addrconf_dad_kick(ifp);
2766 }
2767 read_unlock_bh(&idev->lock);
2768}
2769
1da177e4
LT		 2770#ifdef CONFIG_PROC_FS
2771struct if6_iter_state {
3c40090a 2772 struct seq_net_private p;
1da177e4
LT		 2773 int bucket;
2774};
2775
2776static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2777{
2778 struct inet6_ifaddr *ifa = NULL;
2779 struct if6_iter_state *state = seq->private;
3c40090a 2780 struct net *net = state->p.net;
1da177e4
LT		 2781
2782 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2783 ifa = inet6_addr_lst[state->bucket];
3c40090a
DL		 2784
2785 while (ifa && ifa->idev->dev->nd_net != net)
2786 ifa = ifa->lst_next;
1da177e4
LT		 2787 if (ifa)
2788 break;
2789 }
2790 return ifa;
2791}
2792
2793static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2794{
2795 struct if6_iter_state *state = seq->private;
3c40090a 2796 struct net *net = state->p.net;
1da177e4
LT		 2797
2798 ifa = ifa->lst_next;
2799try_again:
3c40090a
DL		 2800 if (ifa) {
2801 if (ifa->idev->dev->nd_net != net) {
2802 ifa = ifa->lst_next;
2803 goto try_again;
2804 }
2805 }
2806
1da177e4
LT		 2807 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2808 ifa = inet6_addr_lst[state->bucket];
2809 goto try_again;
2810 }
3c40090a 2811
1da177e4
LT		 2812 return ifa;
2813}
2814
2815static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2816{
2817 struct inet6_ifaddr *ifa = if6_get_first(seq);
2818
2819 if (ifa)
2820 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2821 --pos;
2822 return pos ? NULL : ifa;
2823}
2824
2825static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 2826 __acquires(addrconf_hash_lock)
1da177e4
LT		 2827{
2828 read_lock_bh(&addrconf_hash_lock);
2829 return if6_get_idx(seq, *pos);
2830}
2831
2832static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2833{
2834 struct inet6_ifaddr *ifa;
2835
2836 ifa = if6_get_next(seq, v);
2837 ++*pos;
2838 return ifa;
2839}
2840
2841static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 2842 __releases(addrconf_hash_lock)
1da177e4
LT		 2843{
2844 read_unlock_bh(&addrconf_hash_lock);
2845}
2846
2847static int if6_seq_show(struct seq_file *seq, void *v)
2848{
2849 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2850 seq_printf(seq,
9343e79a 2851 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2852 NIP6(ifp->addr),
2853 ifp->idev->dev->ifindex,
2854 ifp->prefix_len,
2855 ifp->scope,
2856 ifp->flags,
2857 ifp->idev->dev->name);
2858 return 0;
2859}
2860
56b3d975 2861static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2862 .start = if6_seq_start,
2863 .next = if6_seq_next,
2864 .show = if6_seq_show,
2865 .stop = if6_seq_stop,
2866};
2867
2868static int if6_seq_open(struct inode *inode, struct file *file)
2869{
3c40090a
DL		 2870 return seq_open_net(inode, file, &if6_seq_ops,
2871 sizeof(struct if6_iter_state));
1da177e4
LT		 2872}
2873
9a32144e 2874static const struct file_operations if6_fops = {
1da177e4
LT		 2875 .owner = THIS_MODULE,
2876 .open = if6_seq_open,
2877 .read = seq_read,
2878 .llseek = seq_lseek,
3c40090a 2879 .release = seq_release_net,
1da177e4
LT		 2880};
2881
3c40090a 2882static int if6_proc_net_init(struct net *net)
1da177e4 2883{
3c40090a 2884 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2885 return -ENOMEM;
2886 return 0;
2887}
2888
3c40090a
DL		 2889static void if6_proc_net_exit(struct net *net)
2890{
2891 proc_net_remove(net, "if_inet6");
2892}
2893
2894static struct pernet_operations if6_proc_net_ops = {
2895 .init = if6_proc_net_init,
2896 .exit = if6_proc_net_exit,
2897};
2898
2899int __init if6_proc_init(void)
2900{
2901 return register_pernet_subsys(&if6_proc_net_ops);
2902}
2903
1da177e4
LT		 2904void if6_proc_exit(void)
2905{
3c40090a 2906 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 2907}
2908#endif /* CONFIG_PROC_FS */
2909
59fbb3a6 2910#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 2911/* Check if address is a home address configured on any interface. */
389f6612 2912int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 2913{
2914 int ret = 0;
2915 struct inet6_ifaddr * ifp;
2916 u8 hash = ipv6_addr_hash(addr);
2917 read_lock_bh(&addrconf_hash_lock);
2918 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
389f6612
DL		 2919 if (ifp->idev->dev->nd_net != net)
2920 continue;
3b9f9a1c
NT		 2921 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2922 (ifp->flags & IFA_F_HOMEADDRESS)) {
2923 ret = 1;
2924 break;
2925 }
2926 }
2927 read_unlock_bh(&addrconf_hash_lock);
2928 return ret;
2929}
2930#endif
2931
1da177e4
LT		 2932/*
2933 * Periodic address status verification
2934 */
2935
2936static void addrconf_verify(unsigned long foo)
2937{
2938 struct inet6_ifaddr *ifp;
2939 unsigned long now, next;
2940 int i;
2941
2942 spin_lock_bh(&addrconf_verify_lock);
2943 now = jiffies;
2944 next = now + ADDR_CHECK_FREQUENCY;
2945
2946 del_timer(&addr_chk_timer);
2947
2948 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2949
2950restart:
5d5780df 2951 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2952 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2953 unsigned long age;
2954#ifdef CONFIG_IPV6_PRIVACY
2955 unsigned long regen_advance;
2956#endif
2957
2958 if (ifp->flags & IFA_F_PERMANENT)
2959 continue;
2960
2961 spin_lock(&ifp->lock);
2962 age = (now - ifp->tstamp) / HZ;
2963
2964#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 2965 regen_advance = ifp->idev->cnf.regen_max_retry *
2966 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 2967 ifp->idev->nd_parms->retrans_time / HZ;
2968#endif
2969
8f27ebb9
YH		 2970 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2971 age >= ifp->valid_lft) {
1da177e4
LT		 2972 spin_unlock(&ifp->lock);
2973 in6_ifa_hold(ifp);
5d5780df 2974 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2975 ipv6_del_addr(ifp);
2976 goto restart;
8f27ebb9
YH		 2977 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2978 spin_unlock(&ifp->lock);
2979 continue;
1da177e4
LT		 2980 } else if (age >= ifp->prefered_lft) {
2981 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2982 int deprecate = 0;
2983
2984 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2985 deprecate = 1;
2986 ifp->flags |= IFA_F_DEPRECATED;
2987 }
2988
2989 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2990 next = ifp->tstamp + ifp->valid_lft * HZ;
2991
2992 spin_unlock(&ifp->lock);
2993
2994 if (deprecate) {
2995 in6_ifa_hold(ifp);
5d5780df 2996 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2997
2998 ipv6_ifa_notify(0, ifp);
2999 in6_ifa_put(ifp);
3000 goto restart;
3001 }
3002#ifdef CONFIG_IPV6_PRIVACY
3003 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3004 !(ifp->flags&IFA_F_TENTATIVE)) {
3005 if (age >= ifp->prefered_lft - regen_advance) {
3006 struct inet6_ifaddr *ifpub = ifp->ifpub;
3007 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3008 next = ifp->tstamp + ifp->prefered_lft * HZ;
3009 if (!ifp->regen_count && ifpub) {
3010 ifp->regen_count++;
3011 in6_ifa_hold(ifp);
3012 in6_ifa_hold(ifpub);
3013 spin_unlock(&ifp->lock);
5d5780df 3014 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3015 spin_lock(&ifpub->lock);
3016 ifpub->regen_count = 0;
3017 spin_unlock(&ifpub->lock);
1da177e4
LT		 3018 ipv6_create_tempaddr(ifpub, ifp);
3019 in6_ifa_put(ifpub);
3020 in6_ifa_put(ifp);
3021 goto restart;
3022 }
3023 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3024 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3025 spin_unlock(&ifp->lock);
3026#endif
3027 } else {
3028 /* ifp->prefered_lft <= ifp->valid_lft */
3029 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3030 next = ifp->tstamp + ifp->prefered_lft * HZ;
3031 spin_unlock(&ifp->lock);
3032 }
3033 }
5d5780df 3034 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3035 }
3036
3037 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3038 add_timer(&addr_chk_timer);
3039 spin_unlock_bh(&addrconf_verify_lock);
3040}
3041
461d8837
TG		 3042static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3043{
3044 struct in6_addr *pfx = NULL;
3045
3046 if (addr)
3047 pfx = nla_data(addr);
3048
3049 if (local) {
3050 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3051 pfx = NULL;
3052 else
3053 pfx = nla_data(local);
3054 }
3055
3056 return pfx;
3057}
3058
ef7c79ed 3059static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3060 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3061 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3062 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3063};
3064
1da177e4
LT		 3065static int
3066inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3067{
b854272b 3068 struct net *net = skb->sk->sk_net;
b933f716
TG		 3069 struct ifaddrmsg *ifm;
3070 struct nlattr *tb[IFA_MAX+1];
1da177e4 3071 struct in6_addr *pfx;
b933f716 3072 int err;
1da177e4 3073
b854272b
DL		 3074 if (net != &init_net)
3075 return -EINVAL;
3076
b933f716
TG		 3077 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3078 if (err < 0)
3079 return err;
3080
3081 ifm = nlmsg_data(nlh);
3082 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3083 if (pfx == NULL)
3084 return -EINVAL;
3085
3086 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3087}
3088
55ebaef1
NT		 3089static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3090 u32 prefered_lft, u32 valid_lft)
081bba5b 3091{
46d48046
YH		 3092 u32 flags = RTF_EXPIRES;
3093
081bba5b
NT		 3094 if (!valid_lft || (prefered_lft > valid_lft))
3095 return -EINVAL;
3096
46d48046 3097 if (valid_lft == INFINITY_LIFE_TIME) {
55ebaef1 3098 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 3099 flags = 0;
3100 } else if (valid_lft >= 0x7FFFFFFF/HZ)
081bba5b
NT		 3101 valid_lft = 0x7FFFFFFF/HZ;
3102
3103 if (prefered_lft == 0)
55ebaef1 3104 ifa_flags |= IFA_F_DEPRECATED;
081bba5b
NT		 3105 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3106 (prefered_lft != INFINITY_LIFE_TIME))
3107 prefered_lft = 0x7FFFFFFF/HZ;
3108
3109 spin_lock_bh(&ifp->lock);
3b9f9a1c 3110 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3111 ifp->tstamp = jiffies;
3112 ifp->valid_lft = valid_lft;
3113 ifp->prefered_lft = prefered_lft;
3114
3115 spin_unlock_bh(&ifp->lock);
3116 if (!(ifp->flags&IFA_F_TENTATIVE))
3117 ipv6_ifa_notify(0, ifp);
081bba5b 3118
46d48046
YH		 3119 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3120 jiffies_to_clock_t(valid_lft * HZ), flags);
081bba5b
NT		 3121 addrconf_verify(0);
3122
3123 return 0;
3124}
3125
1da177e4
LT		 3126static int
3127inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3128{
b854272b 3129 struct net *net = skb->sk->sk_net;
461d8837
TG		 3130 struct ifaddrmsg *ifm;
3131 struct nlattr *tb[IFA_MAX+1];
1da177e4 3132 struct in6_addr *pfx;
7198f8ce
TG		 3133 struct inet6_ifaddr *ifa;
3134 struct net_device *dev;
55ebaef1
NT		 3135 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3136 u8 ifa_flags;
461d8837 3137 int err;
1da177e4 3138
b854272b
DL		 3139 if (net != &init_net)
3140 return -EINVAL;
3141
461d8837
TG		 3142 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3143 if (err < 0)
3144 return err;
3145
3146 ifm = nlmsg_data(nlh);
3147 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3148 if (pfx == NULL)
3149 return -EINVAL;
3150
461d8837 3151 if (tb[IFA_CACHEINFO]) {
0778769d 3152 struct ifa_cacheinfo *ci;
461d8837
TG		 3153
3154 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3155 valid_lft = ci->ifa_valid;
461d8837
TG		 3156 preferred_lft = ci->ifa_prefered;
3157 } else {
3158 preferred_lft = INFINITY_LIFE_TIME;
3159 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3160 }
3161
881d966b 3162 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
7198f8ce
TG		 3163 if (dev == NULL)
3164 return -ENODEV;
3165
55ebaef1 3166 /* We ignore other flags so far. */
3b9f9a1c 3167 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3168
1cab3da6 3169 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3170 if (ifa == NULL) {
3171 /*
3172 * It would be best to check for !NLM_F_CREATE here but
3173 * userspace alreay relies on not having to provide this.
3174 */
3175 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
55ebaef1 3176 ifa_flags, preferred_lft, valid_lft);
081bba5b
NT		 3177 }
3178
7198f8ce
TG		 3179 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3180 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3181 err = -EEXIST;
3182 else
55ebaef1 3183 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3184
3185 in6_ifa_put(ifa);
3186
3187 return err;
1da177e4
LT		 3188}
3189
101bb229
TG		 3190static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3191 u8 scope, int ifindex)
3192{
3193 struct ifaddrmsg *ifm;
3194
3195 ifm = nlmsg_data(nlh);
3196 ifm->ifa_family = AF_INET6;
3197 ifm->ifa_prefixlen = prefixlen;
3198 ifm->ifa_flags = flags;
3199 ifm->ifa_scope = scope;
3200 ifm->ifa_index = ifindex;
3201}
3202
85486af0
TG		 3203static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3204 unsigned long tstamp, u32 preferred, u32 valid)
3205{
3206 struct ifa_cacheinfo ci;
3207
3208 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3209 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3210 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3211 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3212 ci.ifa_prefered = preferred;
3213 ci.ifa_valid = valid;
3214
3215 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3216}
3217
101bb229
TG		 3218static inline int rt_scope(int ifa_scope)
3219{
3220 if (ifa_scope & IFA_HOST)
3221 return RT_SCOPE_HOST;
3222 else if (ifa_scope & IFA_LINK)
3223 return RT_SCOPE_LINK;
3224 else if (ifa_scope & IFA_SITE)
3225 return RT_SCOPE_SITE;
3226 else
3227 return RT_SCOPE_UNIVERSE;
3228}
3229
0ab6803b
TG		 3230static inline int inet6_ifaddr_msgsize(void)
3231{
339bf98f
TG		 3232 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3233 + nla_total_size(16) /* IFA_ADDRESS */
3234 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3235}
c5396a31 3236
1da177e4 3237static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3238 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3239{
1da177e4 3240 struct nlmsghdr *nlh;
85486af0 3241 u32 preferred, valid;
1da177e4 3242
0ab6803b
TG		 3243 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3244 if (nlh == NULL)
26932566 3245 return -EMSGSIZE;
0ab6803b 3246
101bb229
TG		 3247 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3248 ifa->idev->dev->ifindex);
3249
1da177e4 3250 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3251 preferred = ifa->prefered_lft;
3252 valid = ifa->valid_lft;
3253 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3254 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3255 preferred -= tval;
3256 if (valid != INFINITY_LIFE_TIME)
3257 valid -= tval;
1da177e4
LT		 3258 }
3259 } else {
85486af0
TG		 3260 preferred = INFINITY_LIFE_TIME;
3261 valid = INFINITY_LIFE_TIME;
3262 }
3263
0ab6803b 3264 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3265 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3266 nlmsg_cancel(skb, nlh);
3267 return -EMSGSIZE;
3268 }
1da177e4 3269
0ab6803b 3270 return nlmsg_end(skb, nlh);
1da177e4
LT		 3271}
3272
3273static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3274 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3275{
1da177e4 3276 struct nlmsghdr *nlh;
101bb229
TG		 3277 u8 scope = RT_SCOPE_UNIVERSE;
3278 int ifindex = ifmca->idev->dev->ifindex;
3279
3280 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3281 scope = RT_SCOPE_SITE;
1da177e4 3282
0ab6803b
TG		 3283 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3284 if (nlh == NULL)
26932566 3285 return -EMSGSIZE;
85486af0 3286
0ab6803b
TG		 3287 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3288 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3289 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3290 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3291 nlmsg_cancel(skb, nlh);
3292 return -EMSGSIZE;
3293 }
85486af0 3294
0ab6803b 3295 return nlmsg_end(skb, nlh);
1da177e4
LT		 3296}
3297
3298static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3299 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3300{
1da177e4 3301 struct nlmsghdr *nlh;
101bb229
TG		 3302 u8 scope = RT_SCOPE_UNIVERSE;
3303 int ifindex = ifaca->aca_idev->dev->ifindex;
3304
3305 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3306 scope = RT_SCOPE_SITE;
1da177e4 3307
0ab6803b
TG		 3308 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3309 if (nlh == NULL)
26932566 3310 return -EMSGSIZE;
85486af0 3311
0ab6803b
TG		 3312 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3313 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3314 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3315 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3316 nlmsg_cancel(skb, nlh);
3317 return -EMSGSIZE;
3318 }
1da177e4 3319
0ab6803b 3320 return nlmsg_end(skb, nlh);
1da177e4
LT		 3321}
3322
3323enum addr_type_t
3324{
3325 UNICAST_ADDR,
3326 MULTICAST_ADDR,
3327 ANYCAST_ADDR,
3328};
3329
3330static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3331 enum addr_type_t type)
3332{
3333 int idx, ip_idx;
3334 int s_idx, s_ip_idx;
3335 int err = 1;
3336 struct net_device *dev;
3337 struct inet6_dev *idev = NULL;
3338 struct inet6_ifaddr *ifa;
3339 struct ifmcaddr6 *ifmca;
3340 struct ifacaddr6 *ifaca;
3341
3342 s_idx = cb->args[0];
3343 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3344
7562f876 3345 idx = 0;
881d966b 3346 for_each_netdev(&init_net, dev) {
1da177e4 3347 if (idx < s_idx)
7562f876 3348 goto cont;
1da177e4
LT		 3349 if (idx > s_idx)
3350 s_ip_idx = 0;
3351 ip_idx = 0;
3352 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3353 goto cont;
1da177e4
LT		 3354 read_lock_bh(&idev->lock);
3355 switch (type) {
3356 case UNICAST_ADDR:
ae9cda5d 3357 /* unicast address incl. temp addr */
1da177e4
LT		 3358 for (ifa = idev->addr_list; ifa;
3359 ifa = ifa->if_next, ip_idx++) {
3360 if (ip_idx < s_ip_idx)
3361 continue;
5d5619b4
YH		 3362 err = inet6_fill_ifaddr(skb, ifa,
3363 NETLINK_CB(cb->skb).pid,
3364 cb->nlh->nlmsg_seq,
3365 RTM_NEWADDR,
3366 NLM_F_MULTI);
1da177e4 3367 }
1da177e4
LT		 3368 break;
3369 case MULTICAST_ADDR:
3370 /* multicast address */
1ab1457c 3371 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3372 ifmca = ifmca->next, ip_idx++) {
3373 if (ip_idx < s_ip_idx)
3374 continue;
5d5619b4
YH		 3375 err = inet6_fill_ifmcaddr(skb, ifmca,
3376 NETLINK_CB(cb->skb).pid,
3377 cb->nlh->nlmsg_seq,
3378 RTM_GETMULTICAST,
3379 NLM_F_MULTI);
1da177e4
LT		 3380 }
3381 break;
3382 case ANYCAST_ADDR:
3383 /* anycast address */
3384 for (ifaca = idev->ac_list; ifaca;
3385 ifaca = ifaca->aca_next, ip_idx++) {
3386 if (ip_idx < s_ip_idx)
3387 continue;
5d5619b4
YH		 3388 err = inet6_fill_ifacaddr(skb, ifaca,
3389 NETLINK_CB(cb->skb).pid,
3390 cb->nlh->nlmsg_seq,
3391 RTM_GETANYCAST,
3392 NLM_F_MULTI);
1da177e4
LT		 3393 }
3394 break;
3395 default:
3396 break;
3397 }
3398 read_unlock_bh(&idev->lock);
3399 in6_dev_put(idev);
5d5619b4
YH		 3400
3401 if (err <= 0)
3402 break;
7562f876
PE		 3403cont:
3404 idx++;
1da177e4 3405 }
1da177e4
LT		 3406 cb->args[0] = idx;
3407 cb->args[1] = ip_idx;
3408 return skb->len;
3409}
3410
3411static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3412{
b854272b 3413 struct net *net = skb->sk->sk_net;
1da177e4 3414 enum addr_type_t type = UNICAST_ADDR;
b854272b
DL		 3415
3416 if (net != &init_net)
3417 return 0;
3418
1da177e4
LT		 3419 return inet6_dump_addr(skb, cb, type);
3420}
3421
3422static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3423{
b854272b 3424 struct net *net = skb->sk->sk_net;
1da177e4 3425 enum addr_type_t type = MULTICAST_ADDR;
b854272b
DL		 3426
3427 if (net != &init_net)
3428 return 0;
3429
1da177e4
LT		 3430 return inet6_dump_addr(skb, cb, type);
3431}
3432
3433
3434static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3435{
b854272b 3436 struct net *net = skb->sk->sk_net;
1da177e4 3437 enum addr_type_t type = ANYCAST_ADDR;
b854272b
DL		 3438
3439 if (net != &init_net)
3440 return 0;
3441
1da177e4
LT		 3442 return inet6_dump_addr(skb, cb, type);
3443}
3444
1b29fc2c
TG		 3445static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3446 void *arg)
6c223828 3447{
b854272b 3448 struct net *net = in_skb->sk->sk_net;
1b29fc2c
TG		 3449 struct ifaddrmsg *ifm;
3450 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3451 struct in6_addr *addr = NULL;
3452 struct net_device *dev = NULL;
3453 struct inet6_ifaddr *ifa;
3454 struct sk_buff *skb;
6c223828
NT		 3455 int err;
3456
b854272b
DL		 3457 if (net != &init_net)
3458 return -EINVAL;
3459
1b29fc2c
TG		 3460 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3461 if (err < 0)
3462 goto errout;
3463
3464 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3465 if (addr == NULL) {
3466 err = -EINVAL;
3467 goto errout;
6c223828 3468 }
6c223828 3469
1b29fc2c 3470 ifm = nlmsg_data(nlh);
6c223828 3471 if (ifm->ifa_index)
881d966b 3472 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
6c223828 3473
1cab3da6 3474 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3475 err = -EADDRNOTAVAIL;
3476 goto errout;
3477 }
6c223828 3478
0ab6803b 3479 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3480 err = -ENOBUFS;
1b29fc2c 3481 goto errout_ifa;
6c223828
NT		 3482 }
3483
6c223828
NT		 3484 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3485 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3486 if (err < 0) {
3487 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3488 WARN_ON(err == -EMSGSIZE);
3489 kfree_skb(skb);
3490 goto errout_ifa;
3491 }
97c53cac 3492 err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid);
1b29fc2c 3493errout_ifa:
6c223828 3494 in6_ifa_put(ifa);
1b29fc2c 3495errout:
6c223828 3496 return err;
6c223828
NT		 3497}
3498
1da177e4
LT		 3499static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3500{
3501 struct sk_buff *skb;
5d620266 3502 int err = -ENOBUFS;
1da177e4 3503
0ab6803b 3504 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3505 if (skb == NULL)
3506 goto errout;
3507
3508 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3509 if (err < 0) {
3510 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3511 WARN_ON(err == -EMSGSIZE);
3512 kfree_skb(skb);
3513 goto errout;
3514 }
97c53cac 3515 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
5d620266
TG		 3516errout:
3517 if (err < 0)
97c53cac 3518 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3519}
3520
b6f99a21 3521static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3522 __s32 *array, int bytes)
3523{
04561c1f
TG		 3524 BUG_ON(bytes < (DEVCONF_MAX * 4));
3525
1da177e4
LT		 3526 memset(array, 0, bytes);
3527 array[DEVCONF_FORWARDING] = cnf->forwarding;
3528 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3529 array[DEVCONF_MTU6] = cnf->mtu6;
3530 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3531 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3532 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3533 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3534 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3535 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3536 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3537 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3538#ifdef CONFIG_IPV6_PRIVACY
3539 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3540 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3541 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3542 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3543 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3544#endif
3545 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3546 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3547 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3548#ifdef CONFIG_IPV6_ROUTER_PREF
3549 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3550 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3551#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3552 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3553#endif
930d6ff2 3554#endif
fbea49e1 3555 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3556 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3557#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3558 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3559#endif
1da177e4
LT		 3560}
3561
339bf98f
TG		 3562static inline size_t inet6_if_nlmsg_size(void)
3563{
3564 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3565 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3566 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3567 + nla_total_size(4) /* IFLA_MTU */
3568 + nla_total_size(4) /* IFLA_LINK */
3569 + nla_total_size( /* IFLA_PROTINFO */
3570 nla_total_size(4) /* IFLA_INET6_FLAGS */
3571 + nla_total_size(sizeof(struct ifla_cacheinfo))
3572 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3573 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3574 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3575 );
3576}
c5396a31 3577
7f7d9a6b
HX		 3578static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3579 int bytes)
3580{
3581 int i;
3582 int pad = bytes - sizeof(u64) * items;
3583 BUG_ON(pad < 0);
3584
3585 /* Use put_unaligned() because stats may not be aligned for u64. */
3586 put_unaligned(items, &stats[0]);
3587 for (i = 1; i < items; i++)
3588 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3589
3590 memset(&stats[items], 0, pad);
3591}
3592
3593static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3594 int bytes)
3595{
3596 switch(attrtype) {
3597 case IFLA_INET6_STATS:
3598 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3599 break;
3600 case IFLA_INET6_ICMP6STATS:
3601 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3602 break;
3603 }
3604}
3605
1ab1457c 3606static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3607 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3608{
04561c1f 3609 struct net_device *dev = idev->dev;
bf99f1bd 3610 struct nlattr *nla;
04561c1f
TG		 3611 struct ifinfomsg *hdr;
3612 struct nlmsghdr *nlh;
3613 void *protoinfo;
3614 struct ifla_cacheinfo ci;
3615
3616 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3617 if (nlh == NULL)
26932566 3618 return -EMSGSIZE;
04561c1f
TG		 3619
3620 hdr = nlmsg_data(nlh);
3621 hdr->ifi_family = AF_INET6;
3622 hdr->__ifi_pad = 0;
3623 hdr->ifi_type = dev->type;
3624 hdr->ifi_index = dev->ifindex;
3625 hdr->ifi_flags = dev_get_flags(dev);
3626 hdr->ifi_change = 0;
3627
3628 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3629
3630 if (dev->addr_len)
04561c1f 3631 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3632
04561c1f 3633 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3634 if (dev->ifindex != dev->iflink)
04561c1f 3635 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3636
04561c1f
TG		 3637 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3638 if (protoinfo == NULL)
3639 goto nla_put_failure;
1da177e4 3640
04561c1f 3641 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3642
1da177e4
LT		 3643 ci.max_reasm_len = IPV6_MAXPLEN;
3644 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3645 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3646 ci.reachable_time = idev->nd_parms->reachable_time;
3647 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3648 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3649
bf99f1bd
YH		 3650 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3651 if (nla == NULL)
04561c1f 3652 goto nla_put_failure;
bf99f1bd 3653 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3654
bf99f1bd
YH		 3655 /* XXX - MC not implemented */
3656
3657 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3658 if (nla == NULL)
3659 goto nla_put_failure;
3660 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3661
3662 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3663 if (nla == NULL)
3664 goto nla_put_failure;
3665 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3666
04561c1f
TG		 3667 nla_nest_end(skb, protoinfo);
3668 return nlmsg_end(skb, nlh);
1da177e4 3669
04561c1f 3670nla_put_failure:
26932566
PM		 3671 nlmsg_cancel(skb, nlh);
3672 return -EMSGSIZE;
1da177e4
LT		 3673}
3674
3675static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3676{
b854272b 3677 struct net *net = skb->sk->sk_net;
1da177e4
LT		 3678 int idx, err;
3679 int s_idx = cb->args[0];
3680 struct net_device *dev;
3681 struct inet6_dev *idev;
3682
b854272b
DL		 3683 if (net != &init_net)
3684 return 0;
3685
1da177e4 3686 read_lock(&dev_base_lock);
7562f876 3687 idx = 0;
881d966b 3688 for_each_netdev(&init_net, dev) {
1da177e4 3689 if (idx < s_idx)
7562f876 3690 goto cont;
1da177e4 3691 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3692 goto cont;
1ab1457c 3693 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3694 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3695 in6_dev_put(idev);
3696 if (err <= 0)
3697 break;
7562f876
PE		 3698cont:
3699 idx++;
1da177e4
LT		 3700 }
3701 read_unlock(&dev_base_lock);
3702 cb->args[0] = idx;
3703
3704 return skb->len;
3705}
3706
3707void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3708{
3709 struct sk_buff *skb;
8d7a76c9 3710 int err = -ENOBUFS;
1ab1457c 3711
339bf98f 3712 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3713 if (skb == NULL)
3714 goto errout;
3715
3716 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3717 if (err < 0) {
3718 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3719 WARN_ON(err == -EMSGSIZE);
3720 kfree_skb(skb);
3721 goto errout;
3722 }
97c53cac 3723 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
8d7a76c9
TG		 3724errout:
3725 if (err < 0)
97c53cac 3726 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3727}
3728
339bf98f
TG		 3729static inline size_t inet6_prefix_nlmsg_size(void)
3730{
3731 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3732 + nla_total_size(sizeof(struct in6_addr))
3733 + nla_total_size(sizeof(struct prefix_cacheinfo));
3734}
c5396a31 3735
1da177e4 3736static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3737 struct prefix_info *pinfo, u32 pid, u32 seq,
3738 int event, unsigned int flags)
1da177e4 3739{
6051e2f4
TG		 3740 struct prefixmsg *pmsg;
3741 struct nlmsghdr *nlh;
1da177e4
LT		 3742 struct prefix_cacheinfo ci;
3743
6051e2f4
TG		 3744 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3745 if (nlh == NULL)
26932566 3746 return -EMSGSIZE;
6051e2f4
TG		 3747
3748 pmsg = nlmsg_data(nlh);
1da177e4 3749 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3750 pmsg->prefix_pad1 = 0;
3751 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3752 pmsg->prefix_ifindex = idev->dev->ifindex;
3753 pmsg->prefix_len = pinfo->prefix_len;
3754 pmsg->prefix_type = pinfo->type;
8a47077a 3755 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3756 pmsg->prefix_flags = 0;
3757 if (pinfo->onlink)
3758 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3759 if (pinfo->autoconf)
3760 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3761
6051e2f4 3762 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3763
3764 ci.preferred_time = ntohl(pinfo->prefered);
3765 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3766 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3767
6051e2f4 3768 return nlmsg_end(skb, nlh);
1da177e4 3769
6051e2f4 3770nla_put_failure:
26932566
PM		 3771 nlmsg_cancel(skb, nlh);
3772 return -EMSGSIZE;
1da177e4
LT		 3773}
3774
1ab1457c 3775static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3776 struct prefix_info *pinfo)
3777{
3778 struct sk_buff *skb;
8c384bfa 3779 int err = -ENOBUFS;
1da177e4 3780
339bf98f 3781 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3782 if (skb == NULL)
3783 goto errout;
3784
3785 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3786 if (err < 0) {
3787 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3788 WARN_ON(err == -EMSGSIZE);
3789 kfree_skb(skb);
3790 goto errout;
3791 }
97c53cac 3792 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
8c384bfa
TG		 3793errout:
3794 if (err < 0)
97c53cac 3795 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3796}
3797
1da177e4
LT		 3798static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3799{
3800 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3801
3802 switch (event) {
3803 case RTM_NEWADDR:
95c385b4
NH		 3804 /*
3805 * If the address was optimistic
3806 * we inserted the route at the start of
3807 * our DAD process, so we don't need
3808 * to do it again
3809 */
3810 if (!(ifp->rt->rt6i_node))
3811 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3812 if (ifp->idev->cnf.forwarding)
3813 addrconf_join_anycast(ifp);
3814 break;
3815 case RTM_DELADDR:
3816 if (ifp->idev->cnf.forwarding)
3817 addrconf_leave_anycast(ifp);
3818 addrconf_leave_solict(ifp->idev, &ifp->addr);
3819 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3820 if (ip6_del_rt(ifp->rt))
1da177e4 3821 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3822 break;
3823 }
3824}
3825
3826static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3827{
8814c4b5 3828 rcu_read_lock_bh();
1da177e4
LT		 3829 if (likely(ifp->idev->dead == 0))
3830 __ipv6_ifa_notify(event, ifp);
8814c4b5 3831 rcu_read_unlock_bh();
1da177e4
LT		 3832}
3833
3834#ifdef CONFIG_SYSCTL
3835
3836static
3837int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3838 void __user *buffer, size_t *lenp, loff_t *ppos)
3839{
3840 int *valp = ctl->data;
3841 int val = *valp;
3842 int ret;
3843
3844 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3845
c8fecf22
PE		 3846 if (write)
3847 addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3848 return ret;
1da177e4
LT		 3849}
3850
1ab1457c 3851static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3852 int __user *name, int nlen,
3853 void __user *oldval,
3854 size_t __user *oldlenp,
1f29bcd7 3855 void __user *newval, size_t newlen)
1da177e4
LT		 3856{
3857 int *valp = table->data;
c8fecf22 3858 int val = *valp;
1da177e4
LT		 3859 int new;
3860
3861 if (!newval || !newlen)
3862 return 0;
3863 if (newlen != sizeof(int))
3864 return -EINVAL;
3865 if (get_user(new, (int __user *)newval))
3866 return -EFAULT;
3867 if (new == *valp)
3868 return 0;
3869 if (oldval && oldlenp) {
3870 size_t len;
3871 if (get_user(len, oldlenp))
3872 return -EFAULT;
3873 if (len) {
3874 if (len > table->maxlen)
3875 len = table->maxlen;
3876 if (copy_to_user(oldval, valp, len))
3877 return -EFAULT;
3878 if (put_user(len, oldlenp))
3879 return -EFAULT;
3880 }
3881 }
3882
c8fecf22
PE		 3883 *valp = new;
3884 addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 3885 return 1;
3886}
3887
3888static struct addrconf_sysctl_table
3889{
3890 struct ctl_table_header *sysctl_header;
3891 ctl_table addrconf_vars[__NET_IPV6_MAX];
1dab6222 3892 char *dev_name;
ab32ea5d 3893} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3894 .sysctl_header = NULL,
3895 .addrconf_vars = {
1ab1457c 3896 {
1da177e4
LT		 3897 .ctl_name = NET_IPV6_FORWARDING,
3898 .procname = "forwarding",
1ab1457c 3899 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 3900 .maxlen = sizeof(int),
3901 .mode = 0644,
1ab1457c 3902 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 3903 .strategy = &addrconf_sysctl_forward_strategy,
3904 },
3905 {
3906 .ctl_name = NET_IPV6_HOP_LIMIT,
3907 .procname = "hop_limit",
1ab1457c 3908 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 3909 .maxlen = sizeof(int),
3910 .mode = 0644,
3911 .proc_handler = proc_dointvec,
3912 },
3913 {
3914 .ctl_name = NET_IPV6_MTU,
3915 .procname = "mtu",
3916 .data = &ipv6_devconf.mtu6,
1ab1457c 3917 .maxlen = sizeof(int),
1da177e4 3918 .mode = 0644,
1ab1457c 3919 .proc_handler = &proc_dointvec,
1da177e4
LT		 3920 },
3921 {
3922 .ctl_name = NET_IPV6_ACCEPT_RA,
3923 .procname = "accept_ra",
1ab1457c 3924 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 3925 .maxlen = sizeof(int),
3926 .mode = 0644,
1ab1457c 3927 .proc_handler = &proc_dointvec,
1da177e4
LT		 3928 },
3929 {
3930 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3931 .procname = "accept_redirects",
1ab1457c 3932 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 3933 .maxlen = sizeof(int),
3934 .mode = 0644,
1ab1457c 3935 .proc_handler = &proc_dointvec,
1da177e4
LT		 3936 },
3937 {
3938 .ctl_name = NET_IPV6_AUTOCONF,
3939 .procname = "autoconf",
1ab1457c 3940 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 3941 .maxlen = sizeof(int),
3942 .mode = 0644,
1ab1457c 3943 .proc_handler = &proc_dointvec,
1da177e4
LT		 3944 },
3945 {
3946 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3947 .procname = "dad_transmits",
1ab1457c 3948 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 3949 .maxlen = sizeof(int),
3950 .mode = 0644,
1ab1457c 3951 .proc_handler = &proc_dointvec,
1da177e4
LT		 3952 },
3953 {
3954 .ctl_name = NET_IPV6_RTR_SOLICITS,
3955 .procname = "router_solicitations",
1ab1457c 3956 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 3957 .maxlen = sizeof(int),
3958 .mode = 0644,
1ab1457c 3959 .proc_handler = &proc_dointvec,
1da177e4
LT		 3960 },
3961 {
3962 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3963 .procname = "router_solicitation_interval",
1ab1457c 3964 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 3965 .maxlen = sizeof(int),
3966 .mode = 0644,
1ab1457c 3967 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3968 .strategy = &sysctl_jiffies,
3969 },
3970 {
3971 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3972 .procname = "router_solicitation_delay",
1ab1457c 3973 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 3974 .maxlen = sizeof(int),
3975 .mode = 0644,
1ab1457c 3976 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3977 .strategy = &sysctl_jiffies,
3978 },
3979 {
3980 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3981 .procname = "force_mld_version",
1ab1457c 3982 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 3983 .maxlen = sizeof(int),
3984 .mode = 0644,
1ab1457c 3985 .proc_handler = &proc_dointvec,
1da177e4
LT		 3986 },
3987#ifdef CONFIG_IPV6_PRIVACY
3988 {
3989 .ctl_name = NET_IPV6_USE_TEMPADDR,
3990 .procname = "use_tempaddr",
1ab1457c 3991 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 3992 .maxlen = sizeof(int),
3993 .mode = 0644,
1ab1457c 3994 .proc_handler = &proc_dointvec,
1da177e4
LT		 3995 },
3996 {
3997 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3998 .procname = "temp_valid_lft",
1ab1457c 3999 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4000 .maxlen = sizeof(int),
4001 .mode = 0644,
1ab1457c 4002 .proc_handler = &proc_dointvec,
1da177e4
LT		 4003 },
4004 {
4005 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4006 .procname = "temp_prefered_lft",
1ab1457c 4007 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4008 .maxlen = sizeof(int),
4009 .mode = 0644,
1ab1457c 4010 .proc_handler = &proc_dointvec,
1da177e4
LT		 4011 },
4012 {
4013 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4014 .procname = "regen_max_retry",
1ab1457c 4015 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4016 .maxlen = sizeof(int),
4017 .mode = 0644,
1ab1457c 4018 .proc_handler = &proc_dointvec,
1da177e4
LT		 4019 },
4020 {
4021 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4022 .procname = "max_desync_factor",
1ab1457c 4023 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4024 .maxlen = sizeof(int),
4025 .mode = 0644,
1ab1457c 4026 .proc_handler = &proc_dointvec,
1da177e4
LT		 4027 },
4028#endif
4029 {
4030 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4031 .procname = "max_addresses",
4032 .data = &ipv6_devconf.max_addresses,
4033 .maxlen = sizeof(int),
4034 .mode = 0644,
4035 .proc_handler = &proc_dointvec,
4036 },
65f5c7c1
YH		 4037 {
4038 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4039 .procname = "accept_ra_defrtr",
1ab1457c 4040 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4041 .maxlen = sizeof(int),
4042 .mode = 0644,
1ab1457c 4043 .proc_handler = &proc_dointvec,
65f5c7c1 4044 },
c4fd30eb
YH		 4045 {
4046 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4047 .procname = "accept_ra_pinfo",
1ab1457c 4048 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4049 .maxlen = sizeof(int),
4050 .mode = 0644,
1ab1457c 4051 .proc_handler = &proc_dointvec,
c4fd30eb 4052 },
930d6ff2
YH		 4053#ifdef CONFIG_IPV6_ROUTER_PREF
4054 {
4055 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4056 .procname = "accept_ra_rtr_pref",
4057 .data = &ipv6_devconf.accept_ra_rtr_pref,
4058 .maxlen = sizeof(int),
4059 .mode = 0644,
4060 .proc_handler = &proc_dointvec,
4061 },
52e16356
YH		 4062 {
4063 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4064 .procname = "router_probe_interval",
4065 .data = &ipv6_devconf.rtr_probe_interval,
4066 .maxlen = sizeof(int),
4067 .mode = 0644,
4068 .proc_handler = &proc_dointvec_jiffies,
4069 .strategy = &sysctl_jiffies,
4070 },
fa03ef38 4071#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4072 {
4073 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4074 .procname = "accept_ra_rt_info_max_plen",
4075 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4076 .maxlen = sizeof(int),
4077 .mode = 0644,
4078 .proc_handler = &proc_dointvec,
4079 },
4080#endif
930d6ff2 4081#endif
fbea49e1
YH		 4082 {
4083 .ctl_name = NET_IPV6_PROXY_NDP,
4084 .procname = "proxy_ndp",
4085 .data = &ipv6_devconf.proxy_ndp,
4086 .maxlen = sizeof(int),
4087 .mode = 0644,
4088 .proc_handler = &proc_dointvec,
4089 },
0bcbc926
YH		 4090 {
4091 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4092 .procname = "accept_source_route",
4093 .data = &ipv6_devconf.accept_source_route,
4094 .maxlen = sizeof(int),
4095 .mode = 0644,
4096 .proc_handler = &proc_dointvec,
4097 },
95c385b4
NH		 4098#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4099 {
4100 .ctl_name = CTL_UNNUMBERED,
4101 .procname = "optimistic_dad",
4102 .data = &ipv6_devconf.optimistic_dad,
4103 .maxlen = sizeof(int),
4104 .mode = 0644,
4105 .proc_handler = &proc_dointvec,
4106
4107 },
4108#endif
1da177e4
LT		 4109 {
4110 .ctl_name = 0, /* sentinel */
4111 }
4112 },
1da177e4
LT		 4113};
4114
bff16c2f
PE		 4115static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4116 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4117{
4118 int i;
1da177e4 4119 struct addrconf_sysctl_table *t;
1da177e4 4120
1dab6222
PE		 4121#define ADDRCONF_CTL_PATH_DEV 3
4122
4123 struct ctl_path addrconf_ctl_path[] = {
4124 { .procname = "net", .ctl_name = CTL_NET, },
4125 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4126 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4127 { /* to be set */ },
4128 { },
4129 };
4130
4131
af879cc7 4132 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4133 if (t == NULL)
f68635e6
PE		 4134 goto out;
4135
1da177e4
LT		 4136 for (i=0; t->addrconf_vars[i].data; i++) {
4137 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4138 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4139 t->addrconf_vars[i].extra2 = net;
1da177e4 4140 }
1da177e4 4141
1ab1457c
YH		 4142 /*
4143 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4144 * by sysctl and we wouldn't want anyone to change it under our feet
4145 * (see SIOCSIFNAME).
1ab1457c 4146 */
1dab6222
PE		 4147 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4148 if (!t->dev_name)
f68635e6 4149 goto free;
1da177e4 4150
1dab6222
PE		 4151 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4152 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4153
bff16c2f 4154 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4155 t->addrconf_vars);
1da177e4
LT		 4156 if (t->sysctl_header == NULL)
4157 goto free_procname;
f68635e6
PE		 4158
4159 p->sysctl = t;
95897312 4160 return 0;
1da177e4 4161
f68635e6 4162free_procname:
1dab6222 4163 kfree(t->dev_name);
f68635e6 4164free:
1da177e4 4165 kfree(t);
f68635e6 4166out:
95897312 4167 return -ENOBUFS;
1da177e4
LT		 4168}
4169
408c4768
PE		 4170static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4171{
4172 struct addrconf_sysctl_table *t;
4173
4174 if (p->sysctl == NULL)
4175 return;
4176
4177 t = p->sysctl;
4178 p->sysctl = NULL;
4179 unregister_sysctl_table(t->sysctl_header);
4180 kfree(t->dev_name);
4181 kfree(t);
4182}
4183
f52295a9
PE		 4184static void addrconf_sysctl_register(struct inet6_dev *idev)
4185{
408c4768
PE		 4186 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4187 NET_IPV6_NEIGH, "ipv6",
4188 &ndisc_ifinfo_sysctl_change,
4189 NULL);
bff16c2f
PE		 4190 __addrconf_sysctl_register(idev->dev->nd_net, idev->dev->name,
4191 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4192}
4193
408c4768 4194static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4195{
408c4768
PE		 4196 __addrconf_sysctl_unregister(&idev->cnf);
4197 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4198}
4199
4200
4201#endif
4202
e0da5a48
PE		 4203static int addrconf_init_net(struct net *net)
4204{
4205 int err;
4206 struct ipv6_devconf *all, *dflt;
4207
4208 err = -ENOMEM;
4209 all = &ipv6_devconf;
4210 dflt = &ipv6_devconf_dflt;
4211
4212 if (net != &init_net) {
4213 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4214 if (all == NULL)
4215 goto err_alloc_all;
4216
4217 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4218 if (dflt == NULL)
4219 goto err_alloc_dflt;
4220 }
4221
4222 net->ipv6.devconf_all = all;
4223 net->ipv6.devconf_dflt = dflt;
4224
4225#ifdef CONFIG_SYSCTL
4226 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4227 NULL, all);
4228 if (err < 0)
4229 goto err_reg_all;
4230
4231 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4232 NULL, dflt);
4233 if (err < 0)
4234 goto err_reg_dflt;
4235#endif
4236 return 0;
4237
4238#ifdef CONFIG_SYSCTL
4239err_reg_dflt:
4240 __addrconf_sysctl_unregister(all);
4241err_reg_all:
4242 kfree(dflt);
4243#endif
4244err_alloc_dflt:
4245 kfree(all);
4246err_alloc_all:
4247 return err;
4248}
4249
4250static void addrconf_exit_net(struct net *net)
4251{
4252#ifdef CONFIG_SYSCTL
4253 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4254 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4255#endif
4256 if (net != &init_net) {
4257 kfree(net->ipv6.devconf_dflt);
4258 kfree(net->ipv6.devconf_all);
4259 }
4260}
4261
4262static struct pernet_operations addrconf_ops = {
4263 .init = addrconf_init_net,
4264 .exit = addrconf_exit_net,
4265};
4266
1da177e4
LT		 4267/*
4268 * Device notifier
4269 */
4270
4271int register_inet6addr_notifier(struct notifier_block *nb)
4272{
1ab1457c 4273 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4274}
4275
7159039a
YH		 4276EXPORT_SYMBOL(register_inet6addr_notifier);
4277
1da177e4
LT		 4278int unregister_inet6addr_notifier(struct notifier_block *nb)
4279{
1ab1457c 4280 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4281}
4282
7159039a
YH		 4283EXPORT_SYMBOL(unregister_inet6addr_notifier);
4284
1da177e4
LT		 4285/*
4286 * Init / cleanup code
4287 */
4288
4289int __init addrconf_init(void)
4290{
2a8cc6c8
YH		 4291 int err;
4292
4293 if ((err = ipv6_addr_label_init()) < 0) {
4294 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4295 err);
4296 return err;
4297 }
1da177e4 4298
e0da5a48
PE		 4299 register_pernet_subsys(&addrconf_ops);
4300
1da177e4
LT		 4301 /* The addrconf netdev notifier requires that loopback_dev
4302 * has it's ipv6 private information allocated and setup
4303 * before it can bring up and give link-local addresses
4304 * to other devices which are up.
4305 *
4306 * Unfortunately, loopback_dev is not necessarily the first
4307 * entry in the global dev_base list of net devices. In fact,
4308 * it is likely to be the very last entry on that list.
4309 * So this causes the notifier registry below to try and
4310 * give link-local addresses to all devices besides loopback_dev
4311 * first, then loopback_dev, which cases all the non-loopback_dev
4312 * devices to fail to get a link-local address.
4313 *
4314 * So, as a temporary fix, allocate the ipv6 structure for
4315 * loopback_dev first by hand.
4316 * Longer term, all of the dependencies ipv6 has upon the loopback
4317 * device and it being up should be removed.
4318 */
4319 rtnl_lock();
2774c7ab 4320 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4321 err = -ENOMEM;
4322 rtnl_unlock();
4323 if (err)
e0da5a48 4324 goto errlo;
1da177e4 4325
2774c7ab
EB		 4326 ip6_null_entry.u.dst.dev = init_net.loopback_dev;
4327 ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4328#ifdef CONFIG_IPV6_MULTIPLE_TABLES
2774c7ab
EB		 4329 ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
4330 ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
4331 ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
4332 ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4333#endif
c62dba90 4334
1da177e4
LT		 4335 register_netdevice_notifier(&ipv6_dev_notf);
4336
1da177e4 4337 addrconf_verify(0);
c127ea2c
TG		 4338
4339 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4340 if (err < 0)
4341 goto errout;
4342
4343 /* Only the first call to __rtnl_register can fail */
4344 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4345 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4346 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4347 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4348 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4349
2a8cc6c8
YH		 4350 ipv6_addr_label_rtnl_register();
4351
1da177e4 4352 return 0;
c127ea2c
TG		 4353errout:
4354 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4355errlo:
4356 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4357
4358 return err;
1da177e4
LT		 4359}
4360
09f7709f 4361void addrconf_cleanup(void)
1da177e4 4362{
1ab1457c 4363 struct net_device *dev;
1ab1457c 4364 struct inet6_ifaddr *ifa;
1da177e4
LT		 4365 int i;
4366
4367 unregister_netdevice_notifier(&ipv6_dev_notf);
4368
e0da5a48 4369 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4370
4371 rtnl_lock();
4372
4373 /*
4374 * clean dev list.
4375 */
4376
881d966b 4377 for_each_netdev(&init_net, dev) {
dffe4f04 4378 if (__in6_dev_get(dev) == NULL)
1da177e4
LT		 4379 continue;
4380 addrconf_ifdown(dev, 1);
4381 }
2774c7ab 4382 addrconf_ifdown(init_net.loopback_dev, 2);
1da177e4
LT		 4383
4384 /*
4385 * Check hash table.
4386 */
4387
4388 write_lock_bh(&addrconf_hash_lock);
4389 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4390 for (ifa=inet6_addr_lst[i]; ifa; ) {
4391 struct inet6_ifaddr *bifa;
4392
4393 bifa = ifa;
4394 ifa = ifa->lst_next;
4395 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4396 /* Do not free it; something is wrong.
4397 Now we can investigate it with debugger.
4398 */
4399 }
4400 }
4401 write_unlock_bh(&addrconf_hash_lock);
4402
4403 del_timer(&addr_chk_timer);
4404
4405 rtnl_unlock();
1da177e4 4406}
kernel source for telekom puls (alcatel/mediatek)