]> bbs.cooldavid.org Git - net-next-2.6.git/blame - net/ipv6/addrconf.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[MACVLAN]: Allow setting mac address while device is up
[net-next-2.6.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17/*
18 * Changes:
19 *
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
23 * unload.
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
26 * packets.
27 * yoshfuji@USAGI : Fixed interval between DAD
28 * packets.
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
32 * support.
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
37 * seq_file.
b1cacb68
YH		 38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
40 * status etc.
1da177e4
LT		 41 */
42
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
1da177e4
LT		 47#include <linux/net.h>
48#include <linux/in6.h>
49#include <linux/netdevice.h>
1823730f 50#include <linux/if_addr.h>
1da177e4
LT		 51#include <linux/if_arp.h>
52#include <linux/if_arcnet.h>
53#include <linux/if_infiniband.h>
54#include <linux/route.h>
55#include <linux/inetdevice.h>
56#include <linux/init.h>
57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
5d620266 76#include <net/netlink.h>
f24e3d65 77#include <net/pkt_sched.h>
1da177e4
LT		 78#include <linux/if_tunnel.h>
79#include <linux/rtnetlink.h>
80
81#ifdef CONFIG_IPV6_PRIVACY
82#include <linux/random.h>
1da177e4
LT		 83#endif
84
85#include <asm/uaccess.h>
7f7d9a6b 86#include <asm/unaligned.h>
1da177e4
LT		 87
88#include <linux/proc_fs.h>
89#include <linux/seq_file.h>
90
91/* Set to 3 to get tracing... */
92#define ACONF_DEBUG 2
93
94#if ACONF_DEBUG >= 3
95#define ADBG(x) printk x
96#else
97#define ADBG(x)
98#endif
99
100#define INFINITY_LIFE_TIME 0xFFFFFFFF
101#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102
103#ifdef CONFIG_SYSCTL
104static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
105static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
106#endif
107
108#ifdef CONFIG_IPV6_PRIVACY
109static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 110static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 111static void ipv6_regen_rndid(unsigned long data);
112
113static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 114#endif
115
116static int ipv6_count_addresses(struct inet6_dev *idev);
117
118/*
119 * Configured unicast address hash table
120 */
121static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
122static DEFINE_RWLOCK(addrconf_hash_lock);
123
1da177e4
LT		 124static void addrconf_verify(unsigned long);
125
8d06afab 126static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 127static DEFINE_SPINLOCK(addrconf_verify_lock);
128
129static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
130static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
131
132static int addrconf_ifdown(struct net_device *dev, int how);
133
e431b8c0 134static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 135static void addrconf_dad_timer(unsigned long data);
136static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 137static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 138static void addrconf_rs_timer(unsigned long data);
139static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
141
1ab1457c 142static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 143 struct prefix_info *pinfo);
144static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
145
e041c683 146static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 147
ab32ea5d 148struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 149 .forwarding = 0,
150 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
151 .mtu6 = IPV6_MIN_MTU,
152 .accept_ra = 1,
153 .accept_redirects = 1,
154 .autoconf = 1,
155 .force_mld_version = 0,
156 .dad_transmits = 1,
157 .rtr_solicits = MAX_RTR_SOLICITATIONS,
158 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
159 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
160#ifdef CONFIG_IPV6_PRIVACY
161 .use_tempaddr = 0,
162 .temp_valid_lft = TEMP_VALID_LIFETIME,
163 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
164 .regen_max_retry = REGEN_MAX_RETRY,
165 .max_desync_factor = MAX_DESYNC_FACTOR,
166#endif
167 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 168 .accept_ra_defrtr = 1,
c4fd30eb 169 .accept_ra_pinfo = 1,
930d6ff2
YH		 170#ifdef CONFIG_IPV6_ROUTER_PREF
171 .accept_ra_rtr_pref = 1,
52e16356 172 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 173#ifdef CONFIG_IPV6_ROUTE_INFO
174 .accept_ra_rt_info_max_plen = 0,
175#endif
930d6ff2 176#endif
fbea49e1 177 .proxy_ndp = 0,
0bcbc926 178 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 179};
180
ab32ea5d 181static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 182 .forwarding = 0,
183 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
184 .mtu6 = IPV6_MIN_MTU,
185 .accept_ra = 1,
186 .accept_redirects = 1,
187 .autoconf = 1,
188 .dad_transmits = 1,
189 .rtr_solicits = MAX_RTR_SOLICITATIONS,
190 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
191 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
192#ifdef CONFIG_IPV6_PRIVACY
193 .use_tempaddr = 0,
194 .temp_valid_lft = TEMP_VALID_LIFETIME,
195 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
196 .regen_max_retry = REGEN_MAX_RETRY,
197 .max_desync_factor = MAX_DESYNC_FACTOR,
198#endif
199 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 200 .accept_ra_defrtr = 1,
c4fd30eb 201 .accept_ra_pinfo = 1,
930d6ff2
YH		 202#ifdef CONFIG_IPV6_ROUTER_PREF
203 .accept_ra_rtr_pref = 1,
52e16356 204 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 205#ifdef CONFIG_IPV6_ROUTE_INFO
206 .accept_ra_rt_info_max_plen = 0,
207#endif
930d6ff2 208#endif
fbea49e1 209 .proxy_ndp = 0,
0bcbc926 210 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 211};
212
213/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 214const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4
LT		 215const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
216
f24e3d65
MC		 217/* Check if a valid qdisc is available */
218static inline int addrconf_qdisc_ok(struct net_device *dev)
219{
220 return (dev->qdisc != &noop_qdisc);
221}
222
1da177e4
LT		 223static void addrconf_del_timer(struct inet6_ifaddr *ifp)
224{
225 if (del_timer(&ifp->timer))
226 __in6_ifa_put(ifp);
227}
228
229enum addrconf_timer_t
230{
231 AC_NONE,
232 AC_DAD,
233 AC_RS,
234};
235
236static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
237 enum addrconf_timer_t what,
238 unsigned long when)
239{
240 if (!del_timer(&ifp->timer))
241 in6_ifa_hold(ifp);
242
243 switch (what) {
244 case AC_DAD:
245 ifp->timer.function = addrconf_dad_timer;
246 break;
247 case AC_RS:
248 ifp->timer.function = addrconf_rs_timer;
249 break;
250 default:;
251 }
252 ifp->timer.expires = jiffies + when;
253 add_timer(&ifp->timer);
254}
255
7f7d9a6b
HX		 256static int snmp6_alloc_dev(struct inet6_dev *idev)
257{
7f7d9a6b
HX		 258 if (snmp_mib_init((void **)idev->stats.ipv6,
259 sizeof(struct ipstats_mib),
260 __alignof__(struct ipstats_mib)) < 0)
261 goto err_ip;
262 if (snmp_mib_init((void **)idev->stats.icmpv6,
263 sizeof(struct icmpv6_mib),
264 __alignof__(struct icmpv6_mib)) < 0)
265 goto err_icmp;
14878f75
DS		 266 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
267 sizeof(struct icmpv6msg_mib),
268 __alignof__(struct icmpv6msg_mib)) < 0)
269 goto err_icmpmsg;
7f7d9a6b
HX		 270
271 return 0;
272
14878f75
DS		 273err_icmpmsg:
274 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 275err_icmp:
276 snmp_mib_free((void **)idev->stats.ipv6);
277err_ip:
aaf70ec7 278 return -ENOMEM;
7f7d9a6b
HX		 279}
280
16910b98 281static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 282{
14878f75 283 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 284 snmp_mib_free((void **)idev->stats.icmpv6);
285 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 286}
287
1da177e4
LT		 288/* Nobody refers to this device, we may destroy it. */
289
8814c4b5
YH		 290static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
291{
292 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
293 kfree(idev);
294}
295
1da177e4
LT		 296void in6_dev_finish_destroy(struct inet6_dev *idev)
297{
298 struct net_device *dev = idev->dev;
299 BUG_TRAP(idev->addr_list==NULL);
300 BUG_TRAP(idev->mc_list==NULL);
301#ifdef NET_REFCNT_DEBUG
302 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
303#endif
304 dev_put(dev);
305 if (!idev->dead) {
306 printk("Freeing alive inet6 device %p\n", idev);
307 return;
308 }
309 snmp6_free_dev(idev);
8814c4b5 310 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 311}
312
7159039a
YH		 313EXPORT_SYMBOL(in6_dev_finish_destroy);
314
1da177e4
LT		 315static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
316{
317 struct inet6_dev *ndev;
d88ae4cc 318 struct in6_addr maddr;
1da177e4
LT		 319
320 ASSERT_RTNL();
321
322 if (dev->mtu < IPV6_MIN_MTU)
323 return NULL;
324
1ab1457c 325 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 326
1ab1457c
YH		 327 if (ndev == NULL)
328 return NULL;
322f74a4
IO		 329
330 rwlock_init(&ndev->lock);
331 ndev->dev = dev;
332 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
333 ndev->cnf.mtu6 = dev->mtu;
334 ndev->cnf.sysctl = NULL;
335 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
336 if (ndev->nd_parms == NULL) {
337 kfree(ndev);
338 return NULL;
339 }
340 /* We refer to the device */
341 dev_hold(dev);
1da177e4 342
322f74a4
IO		 343 if (snmp6_alloc_dev(ndev) < 0) {
344 ADBG((KERN_WARNING
345 "%s(): cannot allocate memory for statistics; dev=%s.\n",
346 __FUNCTION__, dev->name));
347 neigh_parms_release(&nd_tbl, ndev->nd_parms);
348 ndev->dead = 1;
349 in6_dev_finish_destroy(ndev);
350 return NULL;
351 }
1da177e4 352
322f74a4
IO		 353 if (snmp6_register_dev(ndev) < 0) {
354 ADBG((KERN_WARNING
355 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
356 __FUNCTION__, dev->name));
357 neigh_parms_release(&nd_tbl, ndev->nd_parms);
358 ndev->dead = 1;
359 in6_dev_finish_destroy(ndev);
360 return NULL;
361 }
362
363 /* One reference from device. We must do this before
364 * we invoke __ipv6_regen_rndid().
365 */
366 in6_dev_hold(ndev);
1da177e4
LT		 367
368#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 369 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 370 if ((dev->flags&IFF_LOOPBACK) ||
371 dev->type == ARPHRD_TUNNEL ||
0be669bb
JR		 372#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
373 dev->type == ARPHRD_SIT ||
374#endif
375 dev->type == ARPHRD_NONE) {
322f74a4
IO		 376 printk(KERN_INFO
377 "%s: Disabled Privacy Extensions\n",
378 dev->name);
379 ndev->cnf.use_tempaddr = -1;
380 } else {
381 in6_dev_hold(ndev);
382 ipv6_regen_rndid((unsigned long) ndev);
383 }
1da177e4
LT		 384#endif
385
f24e3d65 386 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 387 ndev->if_flags |= IF_READY;
388
322f74a4
IO		 389 ipv6_mc_init_dev(ndev);
390 ndev->tstamp = jiffies;
1da177e4 391#ifdef CONFIG_SYSCTL
322f74a4
IO		 392 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
393 NET_IPV6_NEIGH, "ipv6",
394 &ndisc_ifinfo_sysctl_change,
395 NULL);
396 addrconf_sysctl_register(ndev, &ndev->cnf);
1da177e4 397#endif
30c4cf57
DS		 398 /* protected by rtnl_lock */
399 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 400
401 /* Join all-node multicast group */
402 ipv6_addr_all_nodes(&maddr);
403 ipv6_dev_mc_inc(dev, &maddr);
404
1da177e4
LT		 405 return ndev;
406}
407
408static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
409{
410 struct inet6_dev *idev;
411
412 ASSERT_RTNL();
413
414 if ((idev = __in6_dev_get(dev)) == NULL) {
415 if ((idev = ipv6_add_dev(dev)) == NULL)
416 return NULL;
417 }
c5e33bdd 418
1da177e4
LT		 419 if (dev->flags&IFF_UP)
420 ipv6_mc_up(idev);
421 return idev;
422}
423
424#ifdef CONFIG_SYSCTL
425static void dev_forward_change(struct inet6_dev *idev)
426{
427 struct net_device *dev;
428 struct inet6_ifaddr *ifa;
429 struct in6_addr addr;
430
431 if (!idev)
432 return;
433 dev = idev->dev;
434 if (dev && (dev->flags & IFF_MULTICAST)) {
435 ipv6_addr_all_routers(&addr);
1ab1457c 436
1da177e4
LT		 437 if (idev->cnf.forwarding)
438 ipv6_dev_mc_inc(dev, &addr);
439 else
440 ipv6_dev_mc_dec(dev, &addr);
441 }
442 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 443 if (ifa->flags&IFA_F_TENTATIVE)
444 continue;
1da177e4
LT		 445 if (idev->cnf.forwarding)
446 addrconf_join_anycast(ifa);
447 else
448 addrconf_leave_anycast(ifa);
449 }
450}
451
452
453static void addrconf_forward_change(void)
454{
455 struct net_device *dev;
456 struct inet6_dev *idev;
457
458 read_lock(&dev_base_lock);
881d966b 459 for_each_netdev(&init_net, dev) {
8814c4b5 460 rcu_read_lock();
1da177e4
LT		 461 idev = __in6_dev_get(dev);
462 if (idev) {
463 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
464 idev->cnf.forwarding = ipv6_devconf.forwarding;
465 if (changed)
466 dev_forward_change(idev);
467 }
8814c4b5 468 rcu_read_unlock();
1da177e4
LT		 469 }
470 read_unlock(&dev_base_lock);
471}
472#endif
473
474/* Nobody refers to this ifaddr, destroy it */
475
476void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
477{
478 BUG_TRAP(ifp->if_next==NULL);
479 BUG_TRAP(ifp->lst_next==NULL);
480#ifdef NET_REFCNT_DEBUG
481 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
482#endif
483
484 in6_dev_put(ifp->idev);
485
486 if (del_timer(&ifp->timer))
487 printk("Timer is still running, when freeing ifa=%p\n", ifp);
488
489 if (!ifp->dead) {
490 printk("Freeing alive inet6 address %p\n", ifp);
491 return;
492 }
493 dst_release(&ifp->rt->u.dst);
494
495 kfree(ifp);
496}
497
e55ffac6
BH		 498static void
499ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
500{
501 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 502 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 503
504 /*
505 * Each device address list is sorted in order of scope -
506 * global before linklocal.
507 */
508 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
509 ifap = &ifa->if_next) {
8a6ce0c0 510 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 511 break;
512 }
513
514 ifp->if_next = *ifap;
515 *ifap = ifp;
516}
517
1da177e4
LT		 518/* On success it returns ifp with increased reference count */
519
520static struct inet6_ifaddr *
521ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 522 int scope, u32 flags)
1da177e4
LT		 523{
524 struct inet6_ifaddr *ifa = NULL;
525 struct rt6_info *rt;
526 int hash;
527 int err = 0;
528
8814c4b5 529 rcu_read_lock_bh();
1da177e4
LT		 530 if (idev->dead) {
531 err = -ENODEV; /*XXX*/
532 goto out2;
533 }
534
535 write_lock(&addrconf_hash_lock);
536
537 /* Ignore adding duplicate addresses on an interface */
538 if (ipv6_chk_same_addr(addr, idev->dev)) {
539 ADBG(("ipv6_add_addr: already assigned\n"));
540 err = -EEXIST;
541 goto out;
542 }
543
322f74a4 544 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 545
546 if (ifa == NULL) {
547 ADBG(("ipv6_add_addr: malloc failed\n"));
548 err = -ENOBUFS;
549 goto out;
550 }
551
552 rt = addrconf_dst_alloc(idev, addr, 0);
553 if (IS_ERR(rt)) {
554 err = PTR_ERR(rt);
555 goto out;
556 }
557
1da177e4
LT		 558 ipv6_addr_copy(&ifa->addr, addr);
559
560 spin_lock_init(&ifa->lock);
561 init_timer(&ifa->timer);
562 ifa->timer.data = (unsigned long) ifa;
563 ifa->scope = scope;
564 ifa->prefix_len = pfxlen;
565 ifa->flags = flags | IFA_F_TENTATIVE;
566 ifa->cstamp = ifa->tstamp = jiffies;
567
57f5f544
KF		 568 ifa->rt = rt;
569
95c385b4
NH		 570 /*
571 * part one of RFC 4429, section 3.3
572 * We should not configure an address as
573 * optimistic if we do not yet know the link
574 * layer address of our nexhop router
575 */
576
577 if (rt->rt6i_nexthop == NULL)
578 ifa->flags &= ~IFA_F_OPTIMISTIC;
579
1da177e4
LT		 580 ifa->idev = idev;
581 in6_dev_hold(idev);
582 /* For caller */
583 in6_ifa_hold(ifa);
584
585 /* Add to big hash table */
586 hash = ipv6_addr_hash(addr);
587
588 ifa->lst_next = inet6_addr_lst[hash];
589 inet6_addr_lst[hash] = ifa;
590 in6_ifa_hold(ifa);
591 write_unlock(&addrconf_hash_lock);
592
593 write_lock(&idev->lock);
594 /* Add to inet6_dev unicast addr list. */
e55ffac6 595 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 596
597#ifdef CONFIG_IPV6_PRIVACY
598 if (ifa->flags&IFA_F_TEMPORARY) {
599 ifa->tmp_next = idev->tempaddr_list;
600 idev->tempaddr_list = ifa;
601 in6_ifa_hold(ifa);
602 }
603#endif
604
1da177e4
LT		 605 in6_ifa_hold(ifa);
606 write_unlock(&idev->lock);
607out2:
8814c4b5 608 rcu_read_unlock_bh();
1da177e4 609
fd92833a 610 if (likely(err == 0))
e041c683 611 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 612 else {
613 kfree(ifa);
614 ifa = ERR_PTR(err);
615 }
616
617 return ifa;
618out:
619 write_unlock(&addrconf_hash_lock);
620 goto out2;
621}
622
623/* This function wants to get referenced ifp and releases it before return */
624
625static void ipv6_del_addr(struct inet6_ifaddr *ifp)
626{
627 struct inet6_ifaddr *ifa, **ifap;
628 struct inet6_dev *idev = ifp->idev;
629 int hash;
630 int deleted = 0, onlink = 0;
631 unsigned long expires = jiffies;
632
633 hash = ipv6_addr_hash(&ifp->addr);
634
635 ifp->dead = 1;
636
637 write_lock_bh(&addrconf_hash_lock);
638 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
639 ifap = &ifa->lst_next) {
640 if (ifa == ifp) {
641 *ifap = ifa->lst_next;
642 __in6_ifa_put(ifp);
643 ifa->lst_next = NULL;
644 break;
645 }
646 }
647 write_unlock_bh(&addrconf_hash_lock);
648
649 write_lock_bh(&idev->lock);
650#ifdef CONFIG_IPV6_PRIVACY
651 if (ifp->flags&IFA_F_TEMPORARY) {
652 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
653 ifap = &ifa->tmp_next) {
654 if (ifa == ifp) {
655 *ifap = ifa->tmp_next;
656 if (ifp->ifpub) {
657 in6_ifa_put(ifp->ifpub);
658 ifp->ifpub = NULL;
659 }
660 __in6_ifa_put(ifp);
661 ifa->tmp_next = NULL;
662 break;
663 }
664 }
665 }
666#endif
667
1d142804 668 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 669 if (ifa == ifp) {
670 *ifap = ifa->if_next;
671 __in6_ifa_put(ifp);
672 ifa->if_next = NULL;
673 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
674 break;
675 deleted = 1;
1d142804 676 continue;
1da177e4
LT		 677 } else if (ifp->flags & IFA_F_PERMANENT) {
678 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
679 ifp->prefix_len)) {
680 if (ifa->flags & IFA_F_PERMANENT) {
681 onlink = 1;
682 if (deleted)
683 break;
684 } else {
685 unsigned long lifetime;
686
687 if (!onlink)
688 onlink = -1;
689
690 spin_lock(&ifa->lock);
691 lifetime = min_t(unsigned long,
692 ifa->valid_lft, 0x7fffffffUL/HZ);
693 if (time_before(expires,
694 ifa->tstamp + lifetime * HZ))
695 expires = ifa->tstamp + lifetime * HZ;
696 spin_unlock(&ifa->lock);
697 }
698 }
699 }
1d142804 700 ifap = &ifa->if_next;
1da177e4
LT		 701 }
702 write_unlock_bh(&idev->lock);
703
704 ipv6_ifa_notify(RTM_DELADDR, ifp);
705
e041c683 706 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 707
708 addrconf_del_timer(ifp);
709
710 /*
711 * Purge or update corresponding prefix
712 *
713 * 1) we don't purge prefix here if address was not permanent.
714 * prefix is managed by its own lifetime.
715 * 2) if there're no addresses, delete prefix.
716 * 3) if there're still other permanent address(es),
717 * corresponding prefix is still permanent.
718 * 4) otherwise, update prefix lifetime to the
719 * longest valid lifetime among the corresponding
720 * addresses on the device.
721 * Note: subsequent RA will update lifetime.
722 *
723 * --yoshfuji
724 */
725 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
726 struct in6_addr prefix;
727 struct rt6_info *rt;
728
729 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
730 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
731
732 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
733 if (onlink == 0) {
e0a1ad73 734 ip6_del_rt(rt);
1da177e4
LT		 735 rt = NULL;
736 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
737 rt->rt6i_expires = expires;
738 rt->rt6i_flags |= RTF_EXPIRES;
739 }
740 }
741 dst_release(&rt->u.dst);
742 }
743
744 in6_ifa_put(ifp);
745}
746
747#ifdef CONFIG_IPV6_PRIVACY
748static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
749{
750 struct inet6_dev *idev = ifp->idev;
751 struct in6_addr addr, *tmpaddr;
752 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
753 int tmp_plen;
754 int ret = 0;
755 int max_addresses;
95c385b4 756 u32 addr_flags;
1da177e4
LT		 757
758 write_lock(&idev->lock);
759 if (ift) {
760 spin_lock_bh(&ift->lock);
761 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
762 spin_unlock_bh(&ift->lock);
763 tmpaddr = &addr;
764 } else {
765 tmpaddr = NULL;
766 }
767retry:
768 in6_dev_hold(idev);
769 if (idev->cnf.use_tempaddr <= 0) {
770 write_unlock(&idev->lock);
771 printk(KERN_INFO
772 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
773 in6_dev_put(idev);
774 ret = -1;
775 goto out;
776 }
777 spin_lock_bh(&ifp->lock);
778 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
779 idev->cnf.use_tempaddr = -1; /*XXX*/
780 spin_unlock_bh(&ifp->lock);
781 write_unlock(&idev->lock);
782 printk(KERN_WARNING
783 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
784 in6_dev_put(idev);
785 ret = -1;
786 goto out;
787 }
788 in6_ifa_hold(ifp);
789 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
790 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
791 spin_unlock_bh(&ifp->lock);
792 write_unlock(&idev->lock);
793 printk(KERN_WARNING
794 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
795 in6_ifa_put(ifp);
796 in6_dev_put(idev);
797 ret = -1;
798 goto out;
799 }
800 memcpy(&addr.s6_addr[8], idev->rndid, 8);
801 tmp_valid_lft = min_t(__u32,
802 ifp->valid_lft,
803 idev->cnf.temp_valid_lft);
1ab1457c
YH		 804 tmp_prefered_lft = min_t(__u32,
805 ifp->prefered_lft,
1da177e4
LT		 806 idev->cnf.temp_prefered_lft - desync_factor / HZ);
807 tmp_plen = ifp->prefix_len;
808 max_addresses = idev->cnf.max_addresses;
809 tmp_cstamp = ifp->cstamp;
810 tmp_tstamp = ifp->tstamp;
811 spin_unlock_bh(&ifp->lock);
812
813 write_unlock(&idev->lock);
95c385b4
NH		 814
815 addr_flags = IFA_F_TEMPORARY;
816 /* set in addrconf_prefix_rcv() */
817 if (ifp->flags & IFA_F_OPTIMISTIC)
818 addr_flags |= IFA_F_OPTIMISTIC;
819
1da177e4 820 ift = !max_addresses ||
1ab1457c 821 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 822 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 823 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
824 addr_flags) : NULL;
1da177e4
LT		 825 if (!ift || IS_ERR(ift)) {
826 in6_ifa_put(ifp);
827 in6_dev_put(idev);
828 printk(KERN_INFO
829 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
830 tmpaddr = &addr;
831 write_lock(&idev->lock);
832 goto retry;
833 }
834
835 spin_lock_bh(&ift->lock);
836 ift->ifpub = ifp;
837 ift->valid_lft = tmp_valid_lft;
838 ift->prefered_lft = tmp_prefered_lft;
839 ift->cstamp = tmp_cstamp;
840 ift->tstamp = tmp_tstamp;
841 spin_unlock_bh(&ift->lock);
842
843 addrconf_dad_start(ift, 0);
844 in6_ifa_put(ift);
845 in6_dev_put(idev);
846out:
847 return ret;
848}
849#endif
850
851/*
072047e4 852 * Choose an appropriate source address (RFC3484)
1da177e4 853 */
072047e4
YH		 854struct ipv6_saddr_score {
855 int addr_type;
856 unsigned int attrs;
857 int matchlen;
0d27b427 858 int scope;
072047e4
YH		 859 unsigned int rule;
860};
861
862#define IPV6_SADDR_SCORE_LOCAL 0x0001
863#define IPV6_SADDR_SCORE_PREFERRED 0x0004
864#define IPV6_SADDR_SCORE_HOA 0x0008
865#define IPV6_SADDR_SCORE_OIF 0x0010
866#define IPV6_SADDR_SCORE_LABEL 0x0020
867#define IPV6_SADDR_SCORE_PRIVACY 0x0040
868
b6f99a21 869static inline int ipv6_saddr_preferred(int type)
1da177e4 870{
072047e4
YH		 871 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
872 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
873 return 1;
874 return 0;
1da177e4
LT		 875}
876
072047e4 877int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 878 struct in6_addr *daddr, struct in6_addr *saddr)
879{
072047e4
YH		 880 struct ipv6_saddr_score hiscore;
881 struct inet6_ifaddr *ifa_result = NULL;
882 int daddr_type = __ipv6_addr_type(daddr);
883 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
303065a8
YH		 884 int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0;
885 u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex);
072047e4 886 struct net_device *dev;
1da177e4 887
072047e4 888 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 889
072047e4 890 read_lock(&dev_base_lock);
8814c4b5 891 rcu_read_lock();
1da177e4 892
881d966b 893 for_each_netdev(&init_net, dev) {
072047e4
YH		 894 struct inet6_dev *idev;
895 struct inet6_ifaddr *ifa;
896
897 /* Rule 0: Candidate Source Address (section 4)
898 * - multicast and link-local destination address,
899 * the set of candidate source address MUST only
900 * include addresses assigned to interfaces
901 * belonging to the same link as the outgoing
902 * interface.
903 * (- For site-local destination addresses, the
904 * set of candidate source addresses MUST only
905 * include addresses assigned to interfaces
906 * belonging to the same site as the outgoing
907 * interface.)
908 */
909 if ((daddr_type & IPV6_ADDR_MULTICAST ||
910 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
911 daddr_dev && dev != daddr_dev)
912 continue;
1da177e4 913
1da177e4 914 idev = __in6_dev_get(dev);
072047e4
YH		 915 if (!idev)
916 continue;
917
918 read_lock_bh(&idev->lock);
919 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
920 struct ipv6_saddr_score score;
921
922 score.addr_type = __ipv6_addr_type(&ifa->addr);
923
6b3ae80a
YH		 924 /* Rule 0:
925 * - Tentative Address (RFC2462 section 5.4)
926 * - A tentative address is not considered
927 * "assigned to an interface" in the traditional
95c385b4 928 * sense, unless it is also flagged as optimistic.
6b3ae80a 929 * - Candidate Source Address (section 4)
072047e4
YH		 930 * - In any case, anycast addresses, multicast
931 * addresses, and the unspecified address MUST
932 * NOT be included in a candidate set.
933 */
95c385b4
NH		 934 if ((ifa->flags & IFA_F_TENTATIVE) &&
935 (!(ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 936 continue;
072047e4
YH		 937 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
938 score.addr_type & IPV6_ADDR_MULTICAST)) {
939 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 940 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 941 "assigned as unicast address on %s",
942 dev->name);
943 continue;
944 }
945
946 score.attrs = 0;
947 score.matchlen = 0;
948 score.scope = 0;
949 score.rule = 0;
950
951 if (ifa_result == NULL) {
952 /* record it if the first available entry */
953 goto record_it;
954 }
955
956 /* Rule 1: Prefer same address */
957 if (hiscore.rule < 1) {
958 if (ipv6_addr_equal(&ifa_result->addr, daddr))
959 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
960 hiscore.rule++;
961 }
962 if (ipv6_addr_equal(&ifa->addr, daddr)) {
963 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
964 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
965 score.rule = 1;
966 goto record_it;
1da177e4 967 }
072047e4
YH		 968 } else {
969 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
970 continue;
1da177e4 971 }
1da177e4 972
072047e4
YH		 973 /* Rule 2: Prefer appropriate scope */
974 if (hiscore.rule < 2) {
975 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
976 hiscore.rule++;
977 }
978 score.scope = __ipv6_addr_src_scope(score.addr_type);
979 if (hiscore.scope < score.scope) {
980 if (hiscore.scope < daddr_scope) {
981 score.rule = 2;
982 goto record_it;
983 } else
984 continue;
985 } else if (score.scope < hiscore.scope) {
986 if (score.scope < daddr_scope)
e55ffac6 987 break; /* addresses sorted by scope */
072047e4
YH		 988 else {
989 score.rule = 2;
990 goto record_it;
991 }
992 }
1da177e4 993
95c385b4 994 /* Rule 3: Avoid deprecated and optimistic addresses */
072047e4
YH		 995 if (hiscore.rule < 3) {
996 if (ipv6_saddr_preferred(hiscore.addr_type) ||
95c385b4
NH		 997 (((ifa_result->flags &
998 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
072047e4
YH		 999 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1000 hiscore.rule++;
1001 }
1002 if (ipv6_saddr_preferred(score.addr_type) ||
6ae5f983 1003 (((ifa->flags &
95c385b4 1004 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
072047e4
YH		 1005 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1006 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1007 score.rule = 3;
1008 goto record_it;
1009 }
1010 } else {
1011 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1012 continue;
1013 }
1da177e4 1014
3b9f9a1c 1015 /* Rule 4: Prefer home address */
59fbb3a6 1016#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 1017 if (hiscore.rule < 4) {
1018 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1019 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1020 hiscore.rule++;
1021 }
1022 if (ifa->flags & IFA_F_HOMEADDRESS) {
1023 score.attrs |= IPV6_SADDR_SCORE_HOA;
1024 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1025 score.rule = 4;
1026 goto record_it;
1027 }
1028 } else {
1029 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1030 continue;
1031 }
1032#else
220bbd74
YH		 1033 if (hiscore.rule < 4)
1034 hiscore.rule++;
3b9f9a1c 1035#endif
072047e4
YH		 1036
1037 /* Rule 5: Prefer outgoing interface */
1038 if (hiscore.rule < 5) {
1039 if (daddr_dev == NULL ||
1040 daddr_dev == ifa_result->idev->dev)
1041 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1042 hiscore.rule++;
1043 }
1044 if (daddr_dev == NULL ||
1045 daddr_dev == ifa->idev->dev) {
1046 score.attrs |= IPV6_SADDR_SCORE_OIF;
1047 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1048 score.rule = 5;
1049 goto record_it;
1050 }
1051 } else {
1052 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1053 continue;
1054 }
1055
1056 /* Rule 6: Prefer matching label */
1057 if (hiscore.rule < 6) {
c1ee656c 1058 if (ipv6_addr_label(&ifa_result->addr,
303065a8
YH		 1059 hiscore.addr_type,
1060 ifa_result->idev->dev->ifindex) == daddr_label)
072047e4
YH		 1061 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1062 hiscore.rule++;
1063 }
c1ee656c 1064 if (ipv6_addr_label(&ifa->addr,
303065a8
YH		 1065 score.addr_type,
1066 ifa->idev->dev->ifindex) == daddr_label) {
072047e4
YH		 1067 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1068 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1069 score.rule = 6;
1070 goto record_it;
1da177e4 1071 }
072047e4
YH		 1072 } else {
1073 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1074 continue;
1075 }
1076
44fd0261 1077#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1078 /* Rule 7: Prefer public address
1079 * Note: prefer temprary address if use_tempaddr >= 2
1080 */
1081 if (hiscore.rule < 7) {
1082 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1083 (ifa_result->idev->cnf.use_tempaddr >= 2))
1084 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1085 hiscore.rule++;
1086 }
1087 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1088 (ifa->idev->cnf.use_tempaddr >= 2)) {
1089 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1090 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1091 score.rule = 7;
1092 goto record_it;
1093 }
1094 } else {
1095 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1096 continue;
1097 }
5e2707fa
YH		 1098#else
1099 if (hiscore.rule < 7)
1100 hiscore.rule++;
44fd0261 1101#endif
072047e4 1102 /* Rule 8: Use longest matching prefix */
12da2a43 1103 if (hiscore.rule < 8) {
072047e4 1104 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1105 hiscore.rule++;
1106 }
072047e4
YH		 1107 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1108 if (score.matchlen > hiscore.matchlen) {
1109 score.rule = 8;
1110 goto record_it;
1da177e4 1111 }
072047e4
YH		 1112#if 0
1113 else if (score.matchlen < hiscore.matchlen)
1114 continue;
1115#endif
1116
1117 /* Final Rule: choose first available one */
1118 continue;
1119record_it:
1120 if (ifa_result)
1121 in6_ifa_put(ifa_result);
1122 in6_ifa_hold(ifa);
1123 ifa_result = ifa;
1124 hiscore = score;
1da177e4 1125 }
072047e4 1126 read_unlock_bh(&idev->lock);
1da177e4 1127 }
8814c4b5 1128 rcu_read_unlock();
1da177e4
LT		 1129 read_unlock(&dev_base_lock);
1130
072047e4
YH		 1131 if (!ifa_result)
1132 return -EADDRNOTAVAIL;
1ab1457c 1133
072047e4
YH		 1134 ipv6_addr_copy(saddr, &ifa_result->addr);
1135 in6_ifa_put(ifa_result);
1136 return 0;
1da177e4
LT		 1137}
1138
1139
1140int ipv6_get_saddr(struct dst_entry *dst,
1141 struct in6_addr *daddr, struct in6_addr *saddr)
1142{
7a3025b1 1143 return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
1da177e4
LT		 1144}
1145
7159039a 1146EXPORT_SYMBOL(ipv6_get_saddr);
1da177e4 1147
95c385b4
NH		 1148int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1149 unsigned char banned_flags)
1da177e4
LT		 1150{
1151 struct inet6_dev *idev;
1152 int err = -EADDRNOTAVAIL;
1153
8814c4b5 1154 rcu_read_lock();
1da177e4
LT		 1155 if ((idev = __in6_dev_get(dev)) != NULL) {
1156 struct inet6_ifaddr *ifp;
1157
1158 read_lock_bh(&idev->lock);
1159 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1160 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1161 ipv6_addr_copy(addr, &ifp->addr);
1162 err = 0;
1163 break;
1164 }
1165 }
1166 read_unlock_bh(&idev->lock);
1167 }
8814c4b5 1168 rcu_read_unlock();
1da177e4
LT		 1169 return err;
1170}
1171
1172static int ipv6_count_addresses(struct inet6_dev *idev)
1173{
1174 int cnt = 0;
1175 struct inet6_ifaddr *ifp;
1176
1177 read_lock_bh(&idev->lock);
1178 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1179 cnt++;
1180 read_unlock_bh(&idev->lock);
1181 return cnt;
1182}
1183
1184int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1185{
1186 struct inet6_ifaddr * ifp;
1187 u8 hash = ipv6_addr_hash(addr);
1188
1189 read_lock_bh(&addrconf_hash_lock);
1190 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1191 if (ipv6_addr_equal(&ifp->addr, addr) &&
1192 !(ifp->flags&IFA_F_TENTATIVE)) {
1193 if (dev == NULL || ifp->idev->dev == dev ||
1194 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1195 break;
1196 }
1197 }
1198 read_unlock_bh(&addrconf_hash_lock);
1199 return ifp != NULL;
1200}
1201
7159039a
YH		 1202EXPORT_SYMBOL(ipv6_chk_addr);
1203
1da177e4
LT		 1204static
1205int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1206{
1207 struct inet6_ifaddr * ifp;
1208 u8 hash = ipv6_addr_hash(addr);
1209
1210 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1211 if (ipv6_addr_equal(&ifp->addr, addr)) {
1212 if (dev == NULL || ifp->idev->dev == dev)
1213 break;
1214 }
1215 }
1216 return ifp != NULL;
1217}
1218
1219struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1220{
1221 struct inet6_ifaddr * ifp;
1222 u8 hash = ipv6_addr_hash(addr);
1223
1224 read_lock_bh(&addrconf_hash_lock);
1225 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1226 if (ipv6_addr_equal(&ifp->addr, addr)) {
1227 if (dev == NULL || ifp->idev->dev == dev ||
1228 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1229 in6_ifa_hold(ifp);
1230 break;
1231 }
1232 }
1233 }
1234 read_unlock_bh(&addrconf_hash_lock);
1235
1236 return ifp;
1237}
1238
1239int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1240{
1241 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1242 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1243 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1244 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1245 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1246 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1247 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1248 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1249
1250 if (!sk2_rcv_saddr && !sk_ipv6only)
1251 return 1;
1252
1253 if (addr_type2 == IPV6_ADDR_ANY &&
1254 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1255 return 1;
1256
1257 if (addr_type == IPV6_ADDR_ANY &&
1258 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1259 return 1;
1260
1261 if (sk2_rcv_saddr6 &&
1262 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1263 return 1;
1264
1265 if (addr_type == IPV6_ADDR_MAPPED &&
1266 !sk2_ipv6only &&
1267 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1268 return 1;
1269
1270 return 0;
1271}
1272
1273/* Gets referenced address, destroys ifaddr */
1274
9f5336e2 1275static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1276{
1da177e4
LT		 1277 if (ifp->flags&IFA_F_PERMANENT) {
1278 spin_lock_bh(&ifp->lock);
1279 addrconf_del_timer(ifp);
1280 ifp->flags |= IFA_F_TENTATIVE;
1281 spin_unlock_bh(&ifp->lock);
1282 in6_ifa_put(ifp);
1283#ifdef CONFIG_IPV6_PRIVACY
1284 } else if (ifp->flags&IFA_F_TEMPORARY) {
1285 struct inet6_ifaddr *ifpub;
1286 spin_lock_bh(&ifp->lock);
1287 ifpub = ifp->ifpub;
1288 if (ifpub) {
1289 in6_ifa_hold(ifpub);
1290 spin_unlock_bh(&ifp->lock);
1291 ipv6_create_tempaddr(ifpub, ifp);
1292 in6_ifa_put(ifpub);
1293 } else {
1294 spin_unlock_bh(&ifp->lock);
1295 }
1296 ipv6_del_addr(ifp);
1297#endif
1298 } else
1299 ipv6_del_addr(ifp);
1300}
1301
3c21edbd
YH		 1302void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1303{
1304 if (net_ratelimit())
1305 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1306 addrconf_dad_stop(ifp);
1307}
1da177e4
LT		 1308
1309/* Join to solicited addr multicast group. */
1310
1311void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1312{
1313 struct in6_addr maddr;
1314
1315 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1316 return;
1317
1318 addrconf_addr_solict_mult(addr, &maddr);
1319 ipv6_dev_mc_inc(dev, &maddr);
1320}
1321
1322void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1323{
1324 struct in6_addr maddr;
1325
1326 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1327 return;
1328
1329 addrconf_addr_solict_mult(addr, &maddr);
1330 __ipv6_dev_mc_dec(idev, &maddr);
1331}
1332
20380731 1333static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1334{
1335 struct in6_addr addr;
1336 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1337 if (ipv6_addr_any(&addr))
1338 return;
1339 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1340}
1341
20380731 1342static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1343{
1344 struct in6_addr addr;
1345 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1346 if (ipv6_addr_any(&addr))
1347 return;
1348 __ipv6_dev_ac_dec(ifp->idev, &addr);
1349}
1350
073a8e0e
YH		 1351static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1352{
1353 if (dev->addr_len != ETH_ALEN)
1354 return -1;
1355 memcpy(eui, dev->dev_addr, 3);
1356 memcpy(eui + 5, dev->dev_addr + 3, 3);
1357
1358 /*
1359 * The zSeries OSA network cards can be shared among various
1360 * OS instances, but the OSA cards have only one MAC address.
1361 * This leads to duplicate address conflicts in conjunction
1362 * with IPv6 if more than one instance uses the same card.
1363 *
1364 * The driver for these cards can deliver a unique 16-bit
1365 * identifier for each instance sharing the same card. It is
1366 * placed instead of 0xFFFE in the interface identifier. The
1367 * "u" bit of the interface identifier is not inverted in this
1368 * case. Hence the resulting interface identifier has local
1369 * scope according to RFC2373.
1370 */
1371 if (dev->dev_id) {
1372 eui[3] = (dev->dev_id >> 8) & 0xFF;
1373 eui[4] = dev->dev_id & 0xFF;
1374 } else {
1375 eui[3] = 0xFF;
1376 eui[4] = 0xFE;
1377 eui[0] ^= 2;
1378 }
1379 return 0;
1380}
1381
1382static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1383{
1384 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1385 if (dev->addr_len != ARCNET_ALEN)
1386 return -1;
1387 memset(eui, 0, 7);
1388 eui[7] = *(u8*)dev->dev_addr;
1389 return 0;
1390}
1391
1392static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1393{
1394 if (dev->addr_len != INFINIBAND_ALEN)
1395 return -1;
1396 memcpy(eui, dev->dev_addr + 12, 8);
1397 eui[0] |= 2;
1398 return 0;
1399}
1400
1da177e4
LT		 1401static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1402{
1403 switch (dev->type) {
1404 case ARPHRD_ETHER:
1405 case ARPHRD_FDDI:
1406 case ARPHRD_IEEE802_TR:
073a8e0e 1407 return addrconf_ifid_eui48(eui, dev);
1da177e4 1408 case ARPHRD_ARCNET:
073a8e0e 1409 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1410 case ARPHRD_INFINIBAND:
073a8e0e 1411 return addrconf_ifid_infiniband(eui, dev);
1da177e4
LT		 1412 }
1413 return -1;
1414}
1415
1416static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1417{
1418 int err = -1;
1419 struct inet6_ifaddr *ifp;
1420
1421 read_lock_bh(&idev->lock);
1422 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1423 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1424 memcpy(eui, ifp->addr.s6_addr+8, 8);
1425 err = 0;
1426 break;
1427 }
1428 }
1429 read_unlock_bh(&idev->lock);
1430 return err;
1431}
1432
1433#ifdef CONFIG_IPV6_PRIVACY
1434/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1435static int __ipv6_regen_rndid(struct inet6_dev *idev)
1436{
1da177e4 1437regen:
955189ef 1438 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1439 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1440
1441 /*
1442 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1443 * check if generated address is not inappropriate
1444 *
1445 * - Reserved subnet anycast (RFC 2526)
1446 * 11111101 11....11 1xxxxxxx
1447 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1448 * 00-00-5E-FE-xx-xx-xx-xx
1449 * - value 0
1450 * - XXX: already assigned to an address on the device
1451 */
1ab1457c 1452 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1453 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1454 (idev->rndid[7]&0x80))
1455 goto regen;
1456 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1457 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1458 goto regen;
1459 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1460 goto regen;
1461 }
1462
1463 return 0;
1464}
1465
1466static void ipv6_regen_rndid(unsigned long data)
1467{
1468 struct inet6_dev *idev = (struct inet6_dev *) data;
1469 unsigned long expires;
1470
8814c4b5 1471 rcu_read_lock_bh();
1da177e4
LT		 1472 write_lock_bh(&idev->lock);
1473
1474 if (idev->dead)
1475 goto out;
1476
1477 if (__ipv6_regen_rndid(idev) < 0)
1478 goto out;
1ab1457c 1479
1da177e4 1480 expires = jiffies +
1ab1457c 1481 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1482 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1483 if (time_before(expires, jiffies)) {
1484 printk(KERN_WARNING
1485 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1486 idev->dev->name);
1487 goto out;
1488 }
1489
1490 if (!mod_timer(&idev->regen_timer, expires))
1491 in6_dev_hold(idev);
1492
1493out:
1494 write_unlock_bh(&idev->lock);
8814c4b5 1495 rcu_read_unlock_bh();
1da177e4
LT		 1496 in6_dev_put(idev);
1497}
1498
1499static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1500 int ret = 0;
1501
1502 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1503 ret = __ipv6_regen_rndid(idev);
1504 return ret;
1505}
1506#endif
1507
1508/*
1509 * Add prefix route.
1510 */
1511
1512static void
1513addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1514 unsigned long expires, u32 flags)
1da177e4 1515{
86872cb5
TG		 1516 struct fib6_config cfg = {
1517 .fc_table = RT6_TABLE_PREFIX,
1518 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1519 .fc_ifindex = dev->ifindex,
1520 .fc_expires = expires,
1521 .fc_dst_len = plen,
1522 .fc_flags = RTF_UP | flags,
1523 };
1da177e4 1524
86872cb5 1525 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1526
1527 /* Prevent useless cloning on PtP SIT.
1528 This thing is done here expecting that the whole
1529 class of non-broadcast devices need not cloning.
1530 */
0be669bb 1531#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1532 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1533 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1534#endif
1da177e4 1535
86872cb5 1536 ip6_route_add(&cfg);
1da177e4
LT		 1537}
1538
1539/* Create "default" multicast route to the interface */
1540
1541static void addrconf_add_mroute(struct net_device *dev)
1542{
86872cb5
TG		 1543 struct fib6_config cfg = {
1544 .fc_table = RT6_TABLE_LOCAL,
1545 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1546 .fc_ifindex = dev->ifindex,
1547 .fc_dst_len = 8,
1548 .fc_flags = RTF_UP,
1549 };
1550
1551 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1552
1553 ip6_route_add(&cfg);
1da177e4
LT		 1554}
1555
0be669bb 1556#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1557static void sit_route_add(struct net_device *dev)
1558{
86872cb5
TG		 1559 struct fib6_config cfg = {
1560 .fc_table = RT6_TABLE_MAIN,
1561 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1562 .fc_ifindex = dev->ifindex,
1563 .fc_dst_len = 96,
1564 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1565 };
1da177e4
LT		 1566
1567 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1568 ip6_route_add(&cfg);
1da177e4 1569}
0be669bb 1570#endif
1da177e4
LT		 1571
1572static void addrconf_add_lroute(struct net_device *dev)
1573{
1574 struct in6_addr addr;
1575
1576 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1577 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1578}
1579
1580static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1581{
1582 struct inet6_dev *idev;
1583
1584 ASSERT_RTNL();
1585
1586 if ((idev = ipv6_find_idev(dev)) == NULL)
1587 return NULL;
1588
1589 /* Add default multicast route */
1590 addrconf_add_mroute(dev);
1591
1592 /* Add link local route */
1593 addrconf_add_lroute(dev);
1594 return idev;
1595}
1596
1597void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1598{
1599 struct prefix_info *pinfo;
1600 __u32 valid_lft;
1601 __u32 prefered_lft;
1602 int addr_type;
1603 unsigned long rt_expires;
1604 struct inet6_dev *in6_dev;
1605
1606 pinfo = (struct prefix_info *) opt;
1ab1457c 1607
1da177e4
LT		 1608 if (len < sizeof(struct prefix_info)) {
1609 ADBG(("addrconf: prefix option too short\n"));
1610 return;
1611 }
1ab1457c 1612
1da177e4
LT		 1613 /*
1614 * Validation checks ([ADDRCONF], page 19)
1615 */
1616
1617 addr_type = ipv6_addr_type(&pinfo->prefix);
1618
1619 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1620 return;
1621
1622 valid_lft = ntohl(pinfo->valid);
1623 prefered_lft = ntohl(pinfo->prefered);
1624
1625 if (prefered_lft > valid_lft) {
1626 if (net_ratelimit())
1627 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1628 return;
1629 }
1630
1631 in6_dev = in6_dev_get(dev);
1632
1633 if (in6_dev == NULL) {
1634 if (net_ratelimit())
1635 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1636 return;
1637 }
1638
1639 /*
1640 * Two things going on here:
1641 * 1) Add routes for on-link prefixes
1642 * 2) Configure prefixes with the auto flag set
1643 */
1644
1645 /* Avoid arithmetic overflow. Really, we could
1646 save rt_expires in seconds, likely valid_lft,
1647 but it would require division in fib gc, that it
1648 not good.
1649 */
1650 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1651 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1652 else
3dd4bc68
YH		 1653 rt_expires = valid_lft * HZ;
1654
1655 /*
1656 * We convert this (in jiffies) to clock_t later.
1657 * Avoid arithmetic overflow there as well.
1658 * Overflow can happen only if HZ < USER_HZ.
1659 */
1660 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1661 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1662
1663 if (pinfo->onlink) {
1664 struct rt6_info *rt;
1665 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1666
1667 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1668 if (rt->rt6i_flags&RTF_EXPIRES) {
1669 if (valid_lft == 0) {
e0a1ad73 1670 ip6_del_rt(rt);
1da177e4
LT		 1671 rt = NULL;
1672 } else {
3dd4bc68 1673 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1674 }
1675 }
1676 } else if (valid_lft) {
1677 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1678 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1679 }
1680 if (rt)
1681 dst_release(&rt->u.dst);
1682 }
1683
1684 /* Try to figure out our local address for this prefix */
1685
1686 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1687 struct inet6_ifaddr * ifp;
1688 struct in6_addr addr;
1689 int create = 0, update_lft = 0;
1690
1691 if (pinfo->prefix_len == 64) {
1692 memcpy(&addr, &pinfo->prefix, 8);
1693 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1694 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1695 in6_dev_put(in6_dev);
1696 return;
1697 }
1698 goto ok;
1699 }
1700 if (net_ratelimit())
1701 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1702 pinfo->prefix_len);
1703 in6_dev_put(in6_dev);
1704 return;
1705
1706ok:
1707
1708 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1709
1710 if (ifp == NULL && valid_lft) {
1711 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1712 u32 addr_flags = 0;
1713
1714#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1715 if (in6_dev->cnf.optimistic_dad &&
1716 !ipv6_devconf.forwarding)
1717 addr_flags = IFA_F_OPTIMISTIC;
1718#endif
1da177e4
LT		 1719
1720 /* Do not allow to create too much of autoconfigured
1721 * addresses; this would be too easy way to crash kernel.
1722 */
1723 if (!max_addresses ||
1724 ipv6_count_addresses(in6_dev) < max_addresses)
1725 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1726 addr_type&IPV6_ADDR_SCOPE_MASK,
1727 addr_flags);
1da177e4
LT		 1728
1729 if (!ifp || IS_ERR(ifp)) {
1730 in6_dev_put(in6_dev);
1731 return;
1732 }
1733
1734 update_lft = create = 1;
1735 ifp->cstamp = jiffies;
1736 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1737 }
1738
1739 if (ifp) {
1740 int flags;
1741 unsigned long now;
1742#ifdef CONFIG_IPV6_PRIVACY
1743 struct inet6_ifaddr *ift;
1744#endif
1745 u32 stored_lft;
1746
1747 /* update lifetime (RFC2462 5.5.3 e) */
1748 spin_lock(&ifp->lock);
1749 now = jiffies;
1750 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1751 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1752 else
1753 stored_lft = 0;
1754 if (!update_lft && stored_lft) {
1755 if (valid_lft > MIN_VALID_LIFETIME ||
1756 valid_lft > stored_lft)
1757 update_lft = 1;
1758 else if (stored_lft <= MIN_VALID_LIFETIME) {
1759 /* valid_lft <= stored_lft is always true */
1760 /* XXX: IPsec */
1761 update_lft = 0;
1762 } else {
1763 valid_lft = MIN_VALID_LIFETIME;
1764 if (valid_lft < prefered_lft)
1765 prefered_lft = valid_lft;
1766 update_lft = 1;
1767 }
1768 }
1769
1770 if (update_lft) {
1771 ifp->valid_lft = valid_lft;
1772 ifp->prefered_lft = prefered_lft;
1773 ifp->tstamp = now;
1774 flags = ifp->flags;
1775 ifp->flags &= ~IFA_F_DEPRECATED;
1776 spin_unlock(&ifp->lock);
1777
1778 if (!(flags&IFA_F_TENTATIVE))
1779 ipv6_ifa_notify(0, ifp);
1780 } else
1781 spin_unlock(&ifp->lock);
1782
1783#ifdef CONFIG_IPV6_PRIVACY
1784 read_lock_bh(&in6_dev->lock);
1785 /* update all temporary addresses in the list */
1786 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1787 /*
1788 * When adjusting the lifetimes of an existing
1789 * temporary address, only lower the lifetimes.
1790 * Implementations must not increase the
1791 * lifetimes of an existing temporary address
1792 * when processing a Prefix Information Option.
1793 */
1794 spin_lock(&ift->lock);
1795 flags = ift->flags;
1796 if (ift->valid_lft > valid_lft &&
1797 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1798 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1799 if (ift->prefered_lft > prefered_lft &&
1800 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1801 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1802 spin_unlock(&ift->lock);
1803 if (!(flags&IFA_F_TENTATIVE))
1804 ipv6_ifa_notify(0, ift);
1805 }
1806
1807 if (create && in6_dev->cnf.use_tempaddr > 0) {
1808 /*
1809 * When a new public address is created as described in [ADDRCONF],
1810 * also create a new temporary address.
1811 */
1ab1457c 1812 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1813 ipv6_create_tempaddr(ifp, NULL);
1814 } else {
1815 read_unlock_bh(&in6_dev->lock);
1816 }
1817#endif
1818 in6_ifa_put(ifp);
1819 addrconf_verify(0);
1820 }
1821 }
1822 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1823 in6_dev_put(in6_dev);
1824}
1825
1826/*
1827 * Set destination address.
1828 * Special case for SIT interfaces where we create a new "virtual"
1829 * device.
1830 */
1831int addrconf_set_dstaddr(void __user *arg)
1832{
1833 struct in6_ifreq ireq;
1834 struct net_device *dev;
1835 int err = -EINVAL;
1836
1837 rtnl_lock();
1838
1839 err = -EFAULT;
1840 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1841 goto err_exit;
1842
881d966b 1843 dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex);
1da177e4
LT		 1844
1845 err = -ENODEV;
1846 if (dev == NULL)
1847 goto err_exit;
1848
0be669bb 1849#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1850 if (dev->type == ARPHRD_SIT) {
1851 struct ifreq ifr;
1852 mm_segment_t oldfs;
1853 struct ip_tunnel_parm p;
1854
1855 err = -EADDRNOTAVAIL;
1856 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1857 goto err_exit;
1858
1859 memset(&p, 0, sizeof(p));
1860 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1861 p.iph.saddr = 0;
1862 p.iph.version = 4;
1863 p.iph.ihl = 5;
1864 p.iph.protocol = IPPROTO_IPV6;
1865 p.iph.ttl = 64;
1866 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1867
1868 oldfs = get_fs(); set_fs(KERNEL_DS);
1869 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1870 set_fs(oldfs);
1871
1872 if (err == 0) {
1873 err = -ENOBUFS;
881d966b 1874 if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL)
1da177e4
LT		 1875 goto err_exit;
1876 err = dev_open(dev);
1877 }
1878 }
0be669bb 1879#endif
1da177e4
LT		 1880
1881err_exit:
1882 rtnl_unlock();
1883 return err;
1884}
1885
1886/*
1887 * Manual configuration of address on an interface
1888 */
0778769d 1889static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
55ebaef1 1890 __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
1da177e4
LT		 1891{
1892 struct inet6_ifaddr *ifp;
1893 struct inet6_dev *idev;
1894 struct net_device *dev;
1895 int scope;
46d48046 1896 u32 flags = RTF_EXPIRES;
1da177e4
LT		 1897
1898 ASSERT_RTNL();
1ab1457c 1899
0778769d
NT		 1900 /* check the lifetime */
1901 if (!valid_lft || prefered_lft > valid_lft)
1902 return -EINVAL;
1903
881d966b 1904 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4 1905 return -ENODEV;
1ab1457c 1906
1da177e4
LT		 1907 if ((idev = addrconf_add_dev(dev)) == NULL)
1908 return -ENOBUFS;
1909
1910 scope = ipv6_addr_scope(pfx);
1911
46d48046 1912 if (valid_lft == INFINITY_LIFE_TIME) {
0778769d 1913 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 1914 flags = 0;
1915 } else if (valid_lft >= 0x7FFFFFFF/HZ)
0778769d
NT		 1916 valid_lft = 0x7FFFFFFF/HZ;
1917
1918 if (prefered_lft == 0)
1919 ifa_flags |= IFA_F_DEPRECATED;
1920 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1921 (prefered_lft != INFINITY_LIFE_TIME))
1922 prefered_lft = 0x7FFFFFFF/HZ;
1923
1924 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1925
1da177e4 1926 if (!IS_ERR(ifp)) {
06aebfb7 1927 spin_lock_bh(&ifp->lock);
0778769d
NT		 1928 ifp->valid_lft = valid_lft;
1929 ifp->prefered_lft = prefered_lft;
1930 ifp->tstamp = jiffies;
06aebfb7 1931 spin_unlock_bh(&ifp->lock);
0778769d 1932
46d48046
YH		 1933 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1934 jiffies_to_clock_t(valid_lft * HZ), flags);
95c385b4
NH		 1935 /*
1936 * Note that section 3.1 of RFC 4429 indicates
1937 * that the Optimistic flag should not be set for
1938 * manually configured addresses
1939 */
1da177e4
LT		 1940 addrconf_dad_start(ifp, 0);
1941 in6_ifa_put(ifp);
0778769d 1942 addrconf_verify(0);
1da177e4
LT		 1943 return 0;
1944 }
1945
1946 return PTR_ERR(ifp);
1947}
1948
1949static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1950{
1951 struct inet6_ifaddr *ifp;
1952 struct inet6_dev *idev;
1953 struct net_device *dev;
1ab1457c 1954
881d966b 1955 if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
1da177e4
LT		 1956 return -ENODEV;
1957
1958 if ((idev = __in6_dev_get(dev)) == NULL)
1959 return -ENXIO;
1960
1961 read_lock_bh(&idev->lock);
1962 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1963 if (ifp->prefix_len == plen &&
1964 ipv6_addr_equal(pfx, &ifp->addr)) {
1965 in6_ifa_hold(ifp);
1966 read_unlock_bh(&idev->lock);
1ab1457c 1967
1da177e4
LT		 1968 ipv6_del_addr(ifp);
1969
1970 /* If the last address is deleted administratively,
1971 disable IPv6 on this interface.
1972 */
1973 if (idev->addr_list == NULL)
1974 addrconf_ifdown(idev->dev, 1);
1975 return 0;
1976 }
1977 }
1978 read_unlock_bh(&idev->lock);
1979 return -EADDRNOTAVAIL;
1980}
1981
1982
1983int addrconf_add_ifaddr(void __user *arg)
1984{
1985 struct in6_ifreq ireq;
1986 int err;
1ab1457c 1987
1da177e4
LT		 1988 if (!capable(CAP_NET_ADMIN))
1989 return -EPERM;
1ab1457c 1990
1da177e4
LT		 1991 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1992 return -EFAULT;
1993
1994 rtnl_lock();
0778769d 1995 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
55ebaef1 1996 IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 1997 rtnl_unlock();
1998 return err;
1999}
2000
2001int addrconf_del_ifaddr(void __user *arg)
2002{
2003 struct in6_ifreq ireq;
2004 int err;
1ab1457c 2005
1da177e4
LT		 2006 if (!capable(CAP_NET_ADMIN))
2007 return -EPERM;
2008
2009 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2010 return -EFAULT;
2011
2012 rtnl_lock();
2013 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
2014 rtnl_unlock();
2015 return err;
2016}
2017
0be669bb 2018#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2019static void sit_add_v4_addrs(struct inet6_dev *idev)
2020{
2021 struct inet6_ifaddr * ifp;
2022 struct in6_addr addr;
2023 struct net_device *dev;
2024 int scope;
2025
2026 ASSERT_RTNL();
2027
2028 memset(&addr, 0, sizeof(struct in6_addr));
2029 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2030
2031 if (idev->dev->flags&IFF_POINTOPOINT) {
2032 addr.s6_addr32[0] = htonl(0xfe800000);
2033 scope = IFA_LINK;
2034 } else {
2035 scope = IPV6_ADDR_COMPATv4;
2036 }
2037
2038 if (addr.s6_addr32[3]) {
2039 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2040 if (!IS_ERR(ifp)) {
2041 spin_lock_bh(&ifp->lock);
2042 ifp->flags &= ~IFA_F_TENTATIVE;
2043 spin_unlock_bh(&ifp->lock);
2044 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2045 in6_ifa_put(ifp);
2046 }
2047 return;
2048 }
2049
881d966b 2050 for_each_netdev(&init_net, dev) {
e5ed6399 2051 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2052 if (in_dev && (dev->flags & IFF_UP)) {
2053 struct in_ifaddr * ifa;
2054
2055 int flag = scope;
2056
2057 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2058 int plen;
2059
2060 addr.s6_addr32[3] = ifa->ifa_local;
2061
2062 if (ifa->ifa_scope == RT_SCOPE_LINK)
2063 continue;
2064 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2065 if (idev->dev->flags&IFF_POINTOPOINT)
2066 continue;
2067 flag |= IFA_HOST;
2068 }
2069 if (idev->dev->flags&IFF_POINTOPOINT)
2070 plen = 64;
2071 else
2072 plen = 96;
2073
2074 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2075 IFA_F_PERMANENT);
2076 if (!IS_ERR(ifp)) {
2077 spin_lock_bh(&ifp->lock);
2078 ifp->flags &= ~IFA_F_TENTATIVE;
2079 spin_unlock_bh(&ifp->lock);
2080 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2081 in6_ifa_put(ifp);
2082 }
2083 }
2084 }
1ab1457c 2085 }
1da177e4 2086}
0be669bb 2087#endif
1da177e4
LT		 2088
2089static void init_loopback(struct net_device *dev)
2090{
2091 struct inet6_dev *idev;
2092 struct inet6_ifaddr * ifp;
2093
2094 /* ::1 */
2095
2096 ASSERT_RTNL();
2097
2098 if ((idev = ipv6_find_idev(dev)) == NULL) {
2099 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2100 return;
2101 }
2102
2103 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2104 if (!IS_ERR(ifp)) {
2105 spin_lock_bh(&ifp->lock);
2106 ifp->flags &= ~IFA_F_TENTATIVE;
2107 spin_unlock_bh(&ifp->lock);
2108 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2109 in6_ifa_put(ifp);
2110 }
2111}
2112
2113static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2114{
2115 struct inet6_ifaddr * ifp;
95c385b4
NH		 2116 u32 addr_flags = IFA_F_PERMANENT;
2117
2118#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2119 if (idev->cnf.optimistic_dad &&
2120 !ipv6_devconf.forwarding)
2121 addr_flags |= IFA_F_OPTIMISTIC;
2122#endif
1da177e4 2123
95c385b4
NH		 2124
2125 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2126 if (!IS_ERR(ifp)) {
46d48046 2127 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2128 addrconf_dad_start(ifp, 0);
2129 in6_ifa_put(ifp);
2130 }
2131}
2132
2133static void addrconf_dev_config(struct net_device *dev)
2134{
2135 struct in6_addr addr;
2136 struct inet6_dev * idev;
2137
2138 ASSERT_RTNL();
2139
74235a25
HX		 2140 if ((dev->type != ARPHRD_ETHER) &&
2141 (dev->type != ARPHRD_FDDI) &&
2142 (dev->type != ARPHRD_IEEE802_TR) &&
2143 (dev->type != ARPHRD_ARCNET) &&
2144 (dev->type != ARPHRD_INFINIBAND)) {
2145 /* Alas, we support only Ethernet autoconfiguration. */
2146 return;
2147 }
2148
1da177e4
LT		 2149 idev = addrconf_add_dev(dev);
2150 if (idev == NULL)
2151 return;
2152
2153 memset(&addr, 0, sizeof(struct in6_addr));
2154 addr.s6_addr32[0] = htonl(0xFE800000);
2155
2156 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2157 addrconf_add_linklocal(idev, &addr);
2158}
2159
0be669bb 2160#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2161static void addrconf_sit_config(struct net_device *dev)
2162{
2163 struct inet6_dev *idev;
2164
2165 ASSERT_RTNL();
2166
1ab1457c
YH		 2167 /*
2168 * Configure the tunnel with one of our IPv4
2169 * addresses... we should configure all of
1da177e4
LT		 2170 * our v4 addrs in the tunnel
2171 */
2172
2173 if ((idev = ipv6_find_idev(dev)) == NULL) {
2174 printk(KERN_DEBUG "init sit: add_dev failed\n");
2175 return;
2176 }
2177
2178 sit_add_v4_addrs(idev);
2179
2180 if (dev->flags&IFF_POINTOPOINT) {
2181 addrconf_add_mroute(dev);
2182 addrconf_add_lroute(dev);
2183 } else
2184 sit_route_add(dev);
2185}
0be669bb 2186#endif
1da177e4
LT		 2187
2188static inline int
2189ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2190{
2191 struct in6_addr lladdr;
2192
95c385b4 2193 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2194 addrconf_add_linklocal(idev, &lladdr);
2195 return 0;
2196 }
2197 return -1;
2198}
2199
2200static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2201{
2202 struct net_device *link_dev;
2203
2204 /* first try to inherit the link-local address from the link device */
2205 if (idev->dev->iflink &&
881d966b 2206 (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) {
1da177e4
LT		 2207 if (!ipv6_inherit_linklocal(idev, link_dev))
2208 return;
2209 }
2210 /* then try to inherit it from any device */
881d966b 2211 for_each_netdev(&init_net, link_dev) {
1da177e4
LT		 2212 if (!ipv6_inherit_linklocal(idev, link_dev))
2213 return;
2214 }
2215 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2216}
2217
2218/*
2219 * Autoconfigure tunnel with a link-local address so routing protocols,
2220 * DHCPv6, MLD etc. can be run over the virtual link
2221 */
2222
2223static void addrconf_ip6_tnl_config(struct net_device *dev)
2224{
2225 struct inet6_dev *idev;
2226
2227 ASSERT_RTNL();
2228
2229 if ((idev = addrconf_add_dev(dev)) == NULL) {
2230 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2231 return;
2232 }
2233 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2234}
2235
1ab1457c 2236static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2237 void * data)
2238{
2239 struct net_device *dev = (struct net_device *) data;
74235a25 2240 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2241 int run_pending = 0;
b217d616 2242 int err;
1da177e4 2243
e9dc8653
EB		 2244 if (dev->nd_net != &init_net)
2245 return NOTIFY_DONE;
2246
1da177e4 2247 switch(event) {
45ba9dd2 2248 case NETDEV_REGISTER:
74235a25 2249 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2250 idev = ipv6_add_dev(dev);
2251 if (!idev)
b217d616 2252 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2253 }
2254 break;
1da177e4 2255 case NETDEV_UP:
3c21edbd 2256 case NETDEV_CHANGE:
c2edacf8
JV		 2257 if (dev->flags & IFF_SLAVE)
2258 break;
2259
3c21edbd 2260 if (event == NETDEV_UP) {
f24e3d65 2261 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2262 /* device is not ready yet. */
2263 printk(KERN_INFO
2264 "ADDRCONF(NETDEV_UP): %s: "
2265 "link is not ready\n",
2266 dev->name);
2267 break;
2268 }
99081049 2269
d31c7b8f
EP		 2270 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2271 idev = ipv6_add_dev(dev);
2272
99081049
KS		 2273 if (idev)
2274 idev->if_flags |= IF_READY;
3c21edbd 2275 } else {
f24e3d65 2276 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2277 /* device is still not ready. */
2278 break;
2279 }
2280
2281 if (idev) {
2282 if (idev->if_flags & IF_READY) {
2283 /* device is already configured. */
2284 break;
2285 }
2286 idev->if_flags |= IF_READY;
2287 }
2288
2289 printk(KERN_INFO
2290 "ADDRCONF(NETDEV_CHANGE): %s: "
2291 "link becomes ready\n",
2292 dev->name);
2293
c5e33bdd 2294 run_pending = 1;
3c21edbd
YH		 2295 }
2296
1da177e4 2297 switch(dev->type) {
0be669bb 2298#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2299 case ARPHRD_SIT:
2300 addrconf_sit_config(dev);
2301 break;
0be669bb 2302#endif
1da177e4
LT		 2303 case ARPHRD_TUNNEL6:
2304 addrconf_ip6_tnl_config(dev);
2305 break;
2306 case ARPHRD_LOOPBACK:
2307 init_loopback(dev);
2308 break;
2309
2310 default:
2311 addrconf_dev_config(dev);
2312 break;
3ff50b79 2313 }
1da177e4 2314 if (idev) {
c5e33bdd
YH		 2315 if (run_pending)
2316 addrconf_dad_run(idev);
2317
1da177e4
LT		 2318 /* If the MTU changed during the interface down, when the
2319 interface up, the changed MTU must be reflected in the
2320 idev as well as routers.
2321 */
2322 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2323 rt6_mtu_change(dev, dev->mtu);
2324 idev->cnf.mtu6 = dev->mtu;
2325 }
2326 idev->tstamp = jiffies;
2327 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2328 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2329 stop IPv6 on this interface.
2330 */
2331 if (dev->mtu < IPV6_MIN_MTU)
2332 addrconf_ifdown(dev, event != NETDEV_DOWN);
2333 }
2334 break;
2335
2336 case NETDEV_CHANGEMTU:
d31c7b8f 2337 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2338 rt6_mtu_change(dev, dev->mtu);
2339 idev->cnf.mtu6 = dev->mtu;
2340 break;
2341 }
2342
d31c7b8f
EP		 2343 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2344 idev = ipv6_add_dev(dev);
2345 if (idev)
2346 break;
2347 }
2348
1da177e4
LT		 2349 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2350
2351 case NETDEV_DOWN:
2352 case NETDEV_UNREGISTER:
2353 /*
2354 * Remove all addresses from this interface.
2355 */
2356 addrconf_ifdown(dev, event != NETDEV_DOWN);
2357 break;
3c21edbd 2358
1da177e4 2359 case NETDEV_CHANGENAME:
1da177e4 2360 if (idev) {
5632c515
SH		 2361 snmp6_unregister_dev(idev);
2362#ifdef CONFIG_SYSCTL
1da177e4
LT		 2363 addrconf_sysctl_unregister(&idev->cnf);
2364 neigh_sysctl_unregister(idev->nd_parms);
2365 neigh_sysctl_register(dev, idev->nd_parms,
2366 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2367 &ndisc_ifinfo_sysctl_change,
2368 NULL);
2369 addrconf_sysctl_register(idev, &idev->cnf);
1da177e4 2370#endif
b217d616
HX		 2371 err = snmp6_register_dev(idev);
2372 if (err)
2373 return notifier_from_errno(err);
5632c515 2374 }
1da177e4 2375 break;
3ff50b79 2376 }
1da177e4
LT		 2377
2378 return NOTIFY_OK;
2379}
2380
2381/*
2382 * addrconf module should be notified of a device going up
2383 */
2384static struct notifier_block ipv6_dev_notf = {
2385 .notifier_call = addrconf_notify,
2386 .priority = 0
2387};
2388
2389static int addrconf_ifdown(struct net_device *dev, int how)
2390{
2391 struct inet6_dev *idev;
2392 struct inet6_ifaddr *ifa, **bifa;
2393 int i;
2394
2395 ASSERT_RTNL();
2396
2774c7ab 2397 if (dev == init_net.loopback_dev && how == 1)
1da177e4
LT		 2398 how = 0;
2399
2400 rt6_ifdown(dev);
2401 neigh_ifdown(&nd_tbl, dev);
2402
2403 idev = __in6_dev_get(dev);
2404 if (idev == NULL)
2405 return -ENODEV;
2406
2407 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2408 Do not dev_put!
1da177e4
LT		 2409 */
2410 if (how == 1) {
1da177e4 2411 idev->dead = 1;
8814c4b5
YH		 2412
2413 /* protected by rtnl_lock */
2414 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2415
2416 /* Step 1.5: remove snmp6 entry */
2417 snmp6_unregister_dev(idev);
2418
2419 }
2420
2421 /* Step 2: clear hash table */
2422 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2423 bifa = &inet6_addr_lst[i];
2424
2425 write_lock_bh(&addrconf_hash_lock);
2426 while ((ifa = *bifa) != NULL) {
2427 if (ifa->idev == idev) {
2428 *bifa = ifa->lst_next;
2429 ifa->lst_next = NULL;
2430 addrconf_del_timer(ifa);
2431 in6_ifa_put(ifa);
2432 continue;
2433 }
2434 bifa = &ifa->lst_next;
2435 }
2436 write_unlock_bh(&addrconf_hash_lock);
2437 }
2438
2439 write_lock_bh(&idev->lock);
2440
2441 /* Step 3: clear flags for stateless addrconf */
2442 if (how != 1)
3c21edbd 2443 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2444
2445 /* Step 4: clear address list */
2446#ifdef CONFIG_IPV6_PRIVACY
2447 if (how == 1 && del_timer(&idev->regen_timer))
2448 in6_dev_put(idev);
2449
2450 /* clear tempaddr list */
2451 while ((ifa = idev->tempaddr_list) != NULL) {
2452 idev->tempaddr_list = ifa->tmp_next;
2453 ifa->tmp_next = NULL;
2454 ifa->dead = 1;
2455 write_unlock_bh(&idev->lock);
2456 spin_lock_bh(&ifa->lock);
2457
2458 if (ifa->ifpub) {
2459 in6_ifa_put(ifa->ifpub);
2460 ifa->ifpub = NULL;
2461 }
2462 spin_unlock_bh(&ifa->lock);
2463 in6_ifa_put(ifa);
2464 write_lock_bh(&idev->lock);
2465 }
2466#endif
2467 while ((ifa = idev->addr_list) != NULL) {
2468 idev->addr_list = ifa->if_next;
2469 ifa->if_next = NULL;
2470 ifa->dead = 1;
2471 addrconf_del_timer(ifa);
2472 write_unlock_bh(&idev->lock);
2473
2474 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2475 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2476 in6_ifa_put(ifa);
2477
2478 write_lock_bh(&idev->lock);
2479 }
2480 write_unlock_bh(&idev->lock);
2481
2482 /* Step 5: Discard multicast list */
2483
2484 if (how == 1)
2485 ipv6_mc_destroy_dev(idev);
2486 else
2487 ipv6_mc_down(idev);
2488
1da177e4 2489 idev->tstamp = jiffies;
1ab1457c 2490
1da177e4
LT		 2491 /* Shot the device (if unregistered) */
2492
2493 if (how == 1) {
2494#ifdef CONFIG_SYSCTL
2495 addrconf_sysctl_unregister(&idev->cnf);
2496 neigh_sysctl_unregister(idev->nd_parms);
2497#endif
2498 neigh_parms_release(&nd_tbl, idev->nd_parms);
2499 neigh_ifdown(&nd_tbl, dev);
2500 in6_dev_put(idev);
2501 }
2502 return 0;
2503}
2504
2505static void addrconf_rs_timer(unsigned long data)
2506{
2507 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2508
2509 if (ifp->idev->cnf.forwarding)
2510 goto out;
2511
2512 if (ifp->idev->if_flags & IF_RA_RCVD) {
2513 /*
2514 * Announcement received after solicitation
2515 * was sent
2516 */
2517 goto out;
2518 }
2519
2520 spin_lock(&ifp->lock);
2521 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2522 struct in6_addr all_routers;
2523
2524 /* The wait after the last probe can be shorter */
2525 addrconf_mod_timer(ifp, AC_RS,
2526 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2527 ifp->idev->cnf.rtr_solicit_delay :
2528 ifp->idev->cnf.rtr_solicit_interval);
2529 spin_unlock(&ifp->lock);
2530
2531 ipv6_addr_all_routers(&all_routers);
2532
2533 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2534 } else {
2535 spin_unlock(&ifp->lock);
2536 /*
2537 * Note: we do not support deprecated "all on-link"
2538 * assumption any longer.
2539 */
2540 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2541 ifp->idev->dev->name);
2542 }
2543
2544out:
2545 in6_ifa_put(ifp);
2546}
2547
2548/*
2549 * Duplicate Address Detection
2550 */
3c21edbd
YH		 2551static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2552{
2553 unsigned long rand_num;
2554 struct inet6_dev *idev = ifp->idev;
2555
95c385b4
NH		 2556 if (ifp->flags & IFA_F_OPTIMISTIC)
2557 rand_num = 0;
2558 else
2559 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2560
3c21edbd
YH		 2561 ifp->probes = idev->cnf.dad_transmits;
2562 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2563}
2564
e431b8c0 2565static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2566{
2567 struct inet6_dev *idev = ifp->idev;
2568 struct net_device *dev = idev->dev;
1da177e4
LT		 2569
2570 addrconf_join_solict(dev, &ifp->addr);
2571
1da177e4 2572 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2573
2574 read_lock_bh(&idev->lock);
2575 if (ifp->dead)
2576 goto out;
2577 spin_lock_bh(&ifp->lock);
2578
2579 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
55ebaef1
NT		 2580 !(ifp->flags&IFA_F_TENTATIVE) ||
2581 ifp->flags & IFA_F_NODAD) {
95c385b4 2582 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2583 spin_unlock_bh(&ifp->lock);
2584 read_unlock_bh(&idev->lock);
2585
2586 addrconf_dad_completed(ifp);
2587 return;
2588 }
2589
6732bade 2590 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2591 spin_unlock_bh(&ifp->lock);
6732bade 2592 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2593 /*
2594 * If the defice is not ready:
2595 * - keep it tentative if it is a permanent address.
2596 * - otherwise, kill it.
2597 */
2598 in6_ifa_hold(ifp);
2599 addrconf_dad_stop(ifp);
6732bade 2600 return;
3c21edbd 2601 }
95c385b4
NH		 2602
2603 /*
2604 * Optimistic nodes can start receiving
2605 * Frames right away
2606 */
2607 if(ifp->flags & IFA_F_OPTIMISTIC)
2608 ip6_ins_rt(ifp->rt);
2609
6732bade
YH		 2610 addrconf_dad_kick(ifp);
2611 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2612out:
2613 read_unlock_bh(&idev->lock);
2614}
2615
2616static void addrconf_dad_timer(unsigned long data)
2617{
2618 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2619 struct inet6_dev *idev = ifp->idev;
2620 struct in6_addr unspec;
2621 struct in6_addr mcaddr;
2622
2623 read_lock_bh(&idev->lock);
2624 if (idev->dead) {
2625 read_unlock_bh(&idev->lock);
2626 goto out;
2627 }
2628 spin_lock_bh(&ifp->lock);
2629 if (ifp->probes == 0) {
2630 /*
2631 * DAD was successful
2632 */
2633
95c385b4 2634 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2635 spin_unlock_bh(&ifp->lock);
2636 read_unlock_bh(&idev->lock);
2637
2638 addrconf_dad_completed(ifp);
2639
2640 goto out;
2641 }
2642
2643 ifp->probes--;
2644 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2645 spin_unlock_bh(&ifp->lock);
2646 read_unlock_bh(&idev->lock);
2647
2648 /* send a neighbour solicitation for our addr */
2649 memset(&unspec, 0, sizeof(unspec));
2650 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2651 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2652out:
2653 in6_ifa_put(ifp);
2654}
2655
2656static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2657{
2658 struct net_device * dev = ifp->idev->dev;
2659
2660 /*
2661 * Configure the address for reception. Now it is valid.
2662 */
2663
2664 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2665
2666 /* If added prefix is link local and forwarding is off,
2667 start sending router solicitations.
2668 */
2669
2670 if (ifp->idev->cnf.forwarding == 0 &&
2671 ifp->idev->cnf.rtr_solicits > 0 &&
2672 (dev->flags&IFF_LOOPBACK) == 0 &&
2673 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2674 struct in6_addr all_routers;
2675
2676 ipv6_addr_all_routers(&all_routers);
2677
2678 /*
2679 * If a host as already performed a random delay
2680 * [...] as part of DAD [...] there is no need
2681 * to delay again before sending the first RS
2682 */
2683 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2684
2685 spin_lock_bh(&ifp->lock);
2686 ifp->probes = 1;
2687 ifp->idev->if_flags |= IF_RS_SENT;
2688 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2689 spin_unlock_bh(&ifp->lock);
2690 }
2691}
2692
c5e33bdd
YH		 2693static void addrconf_dad_run(struct inet6_dev *idev) {
2694 struct inet6_ifaddr *ifp;
2695
2696 read_lock_bh(&idev->lock);
2697 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2698 spin_lock_bh(&ifp->lock);
2699 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2700 spin_unlock_bh(&ifp->lock);
2701 continue;
2702 }
2703 spin_unlock_bh(&ifp->lock);
2704 addrconf_dad_kick(ifp);
2705 }
2706 read_unlock_bh(&idev->lock);
2707}
2708
1da177e4
LT		 2709#ifdef CONFIG_PROC_FS
2710struct if6_iter_state {
2711 int bucket;
2712};
2713
2714static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2715{
2716 struct inet6_ifaddr *ifa = NULL;
2717 struct if6_iter_state *state = seq->private;
2718
2719 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2720 ifa = inet6_addr_lst[state->bucket];
2721 if (ifa)
2722 break;
2723 }
2724 return ifa;
2725}
2726
2727static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2728{
2729 struct if6_iter_state *state = seq->private;
2730
2731 ifa = ifa->lst_next;
2732try_again:
2733 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2734 ifa = inet6_addr_lst[state->bucket];
2735 goto try_again;
2736 }
2737 return ifa;
2738}
2739
2740static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2741{
2742 struct inet6_ifaddr *ifa = if6_get_first(seq);
2743
2744 if (ifa)
2745 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2746 --pos;
2747 return pos ? NULL : ifa;
2748}
2749
2750static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2751{
2752 read_lock_bh(&addrconf_hash_lock);
2753 return if6_get_idx(seq, *pos);
2754}
2755
2756static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2757{
2758 struct inet6_ifaddr *ifa;
2759
2760 ifa = if6_get_next(seq, v);
2761 ++*pos;
2762 return ifa;
2763}
2764
2765static void if6_seq_stop(struct seq_file *seq, void *v)
2766{
2767 read_unlock_bh(&addrconf_hash_lock);
2768}
2769
2770static int if6_seq_show(struct seq_file *seq, void *v)
2771{
2772 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2773 seq_printf(seq,
9343e79a 2774 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2775 NIP6(ifp->addr),
2776 ifp->idev->dev->ifindex,
2777 ifp->prefix_len,
2778 ifp->scope,
2779 ifp->flags,
2780 ifp->idev->dev->name);
2781 return 0;
2782}
2783
56b3d975 2784static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2785 .start = if6_seq_start,
2786 .next = if6_seq_next,
2787 .show = if6_seq_show,
2788 .stop = if6_seq_stop,
2789};
2790
2791static int if6_seq_open(struct inode *inode, struct file *file)
2792{
cf7732e4
PE		 2793 return seq_open_private(file, &if6_seq_ops,
2794 sizeof(struct if6_iter_state));
1da177e4
LT		 2795}
2796
9a32144e 2797static const struct file_operations if6_fops = {
1da177e4
LT		 2798 .owner = THIS_MODULE,
2799 .open = if6_seq_open,
2800 .read = seq_read,
2801 .llseek = seq_lseek,
2802 .release = seq_release_private,
2803};
2804
2805int __init if6_proc_init(void)
2806{
457c4cbc 2807 if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2808 return -ENOMEM;
2809 return 0;
2810}
2811
2812void if6_proc_exit(void)
2813{
457c4cbc 2814 proc_net_remove(&init_net, "if_inet6");
1da177e4
LT		 2815}
2816#endif /* CONFIG_PROC_FS */
2817
59fbb3a6 2818#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 2819/* Check if address is a home address configured on any interface. */
2820int ipv6_chk_home_addr(struct in6_addr *addr)
2821{
2822 int ret = 0;
2823 struct inet6_ifaddr * ifp;
2824 u8 hash = ipv6_addr_hash(addr);
2825 read_lock_bh(&addrconf_hash_lock);
2826 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
2827 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2828 (ifp->flags & IFA_F_HOMEADDRESS)) {
2829 ret = 1;
2830 break;
2831 }
2832 }
2833 read_unlock_bh(&addrconf_hash_lock);
2834 return ret;
2835}
2836#endif
2837
1da177e4
LT		 2838/*
2839 * Periodic address status verification
2840 */
2841
2842static void addrconf_verify(unsigned long foo)
2843{
2844 struct inet6_ifaddr *ifp;
2845 unsigned long now, next;
2846 int i;
2847
2848 spin_lock_bh(&addrconf_verify_lock);
2849 now = jiffies;
2850 next = now + ADDR_CHECK_FREQUENCY;
2851
2852 del_timer(&addr_chk_timer);
2853
2854 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2855
2856restart:
5d5780df 2857 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2858 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2859 unsigned long age;
2860#ifdef CONFIG_IPV6_PRIVACY
2861 unsigned long regen_advance;
2862#endif
2863
2864 if (ifp->flags & IFA_F_PERMANENT)
2865 continue;
2866
2867 spin_lock(&ifp->lock);
2868 age = (now - ifp->tstamp) / HZ;
2869
2870#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 2871 regen_advance = ifp->idev->cnf.regen_max_retry *
2872 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 2873 ifp->idev->nd_parms->retrans_time / HZ;
2874#endif
2875
8f27ebb9
YH		 2876 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2877 age >= ifp->valid_lft) {
1da177e4
LT		 2878 spin_unlock(&ifp->lock);
2879 in6_ifa_hold(ifp);
5d5780df 2880 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2881 ipv6_del_addr(ifp);
2882 goto restart;
8f27ebb9
YH		 2883 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2884 spin_unlock(&ifp->lock);
2885 continue;
1da177e4
LT		 2886 } else if (age >= ifp->prefered_lft) {
2887 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2888 int deprecate = 0;
2889
2890 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2891 deprecate = 1;
2892 ifp->flags |= IFA_F_DEPRECATED;
2893 }
2894
2895 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2896 next = ifp->tstamp + ifp->valid_lft * HZ;
2897
2898 spin_unlock(&ifp->lock);
2899
2900 if (deprecate) {
2901 in6_ifa_hold(ifp);
5d5780df 2902 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2903
2904 ipv6_ifa_notify(0, ifp);
2905 in6_ifa_put(ifp);
2906 goto restart;
2907 }
2908#ifdef CONFIG_IPV6_PRIVACY
2909 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2910 !(ifp->flags&IFA_F_TENTATIVE)) {
2911 if (age >= ifp->prefered_lft - regen_advance) {
2912 struct inet6_ifaddr *ifpub = ifp->ifpub;
2913 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2914 next = ifp->tstamp + ifp->prefered_lft * HZ;
2915 if (!ifp->regen_count && ifpub) {
2916 ifp->regen_count++;
2917 in6_ifa_hold(ifp);
2918 in6_ifa_hold(ifpub);
2919 spin_unlock(&ifp->lock);
5d5780df 2920 read_unlock(&addrconf_hash_lock);
291d809b
HY		 2921 spin_lock(&ifpub->lock);
2922 ifpub->regen_count = 0;
2923 spin_unlock(&ifpub->lock);
1da177e4
LT		 2924 ipv6_create_tempaddr(ifpub, ifp);
2925 in6_ifa_put(ifpub);
2926 in6_ifa_put(ifp);
2927 goto restart;
2928 }
2929 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2930 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2931 spin_unlock(&ifp->lock);
2932#endif
2933 } else {
2934 /* ifp->prefered_lft <= ifp->valid_lft */
2935 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2936 next = ifp->tstamp + ifp->prefered_lft * HZ;
2937 spin_unlock(&ifp->lock);
2938 }
2939 }
5d5780df 2940 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2941 }
2942
2943 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2944 add_timer(&addr_chk_timer);
2945 spin_unlock_bh(&addrconf_verify_lock);
2946}
2947
461d8837
TG		 2948static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2949{
2950 struct in6_addr *pfx = NULL;
2951
2952 if (addr)
2953 pfx = nla_data(addr);
2954
2955 if (local) {
2956 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2957 pfx = NULL;
2958 else
2959 pfx = nla_data(local);
2960 }
2961
2962 return pfx;
2963}
2964
ef7c79ed 2965static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 2966 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2967 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2968 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2969};
2970
1da177e4
LT		 2971static int
2972inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2973{
b933f716
TG		 2974 struct ifaddrmsg *ifm;
2975 struct nlattr *tb[IFA_MAX+1];
1da177e4 2976 struct in6_addr *pfx;
b933f716 2977 int err;
1da177e4 2978
b933f716
TG		 2979 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2980 if (err < 0)
2981 return err;
2982
2983 ifm = nlmsg_data(nlh);
2984 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 2985 if (pfx == NULL)
2986 return -EINVAL;
2987
2988 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2989}
2990
55ebaef1
NT		 2991static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
2992 u32 prefered_lft, u32 valid_lft)
081bba5b 2993{
46d48046
YH		 2994 u32 flags = RTF_EXPIRES;
2995
081bba5b
NT		 2996 if (!valid_lft || (prefered_lft > valid_lft))
2997 return -EINVAL;
2998
46d48046 2999 if (valid_lft == INFINITY_LIFE_TIME) {
55ebaef1 3000 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 3001 flags = 0;
3002 } else if (valid_lft >= 0x7FFFFFFF/HZ)
081bba5b
NT		 3003 valid_lft = 0x7FFFFFFF/HZ;
3004
3005 if (prefered_lft == 0)
55ebaef1 3006 ifa_flags |= IFA_F_DEPRECATED;
081bba5b
NT		 3007 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3008 (prefered_lft != INFINITY_LIFE_TIME))
3009 prefered_lft = 0x7FFFFFFF/HZ;
3010
3011 spin_lock_bh(&ifp->lock);
3b9f9a1c 3012 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3013 ifp->tstamp = jiffies;
3014 ifp->valid_lft = valid_lft;
3015 ifp->prefered_lft = prefered_lft;
3016
3017 spin_unlock_bh(&ifp->lock);
3018 if (!(ifp->flags&IFA_F_TENTATIVE))
3019 ipv6_ifa_notify(0, ifp);
081bba5b 3020
46d48046
YH		 3021 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3022 jiffies_to_clock_t(valid_lft * HZ), flags);
081bba5b
NT		 3023 addrconf_verify(0);
3024
3025 return 0;
3026}
3027
1da177e4
LT		 3028static int
3029inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3030{
461d8837
TG		 3031 struct ifaddrmsg *ifm;
3032 struct nlattr *tb[IFA_MAX+1];
1da177e4 3033 struct in6_addr *pfx;
7198f8ce
TG		 3034 struct inet6_ifaddr *ifa;
3035 struct net_device *dev;
55ebaef1
NT		 3036 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3037 u8 ifa_flags;
461d8837 3038 int err;
1da177e4 3039
461d8837
TG		 3040 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3041 if (err < 0)
3042 return err;
3043
3044 ifm = nlmsg_data(nlh);
3045 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3046 if (pfx == NULL)
3047 return -EINVAL;
3048
461d8837 3049 if (tb[IFA_CACHEINFO]) {
0778769d 3050 struct ifa_cacheinfo *ci;
461d8837
TG		 3051
3052 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3053 valid_lft = ci->ifa_valid;
461d8837
TG		 3054 preferred_lft = ci->ifa_prefered;
3055 } else {
3056 preferred_lft = INFINITY_LIFE_TIME;
3057 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3058 }
3059
881d966b 3060 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
7198f8ce
TG		 3061 if (dev == NULL)
3062 return -ENODEV;
3063
55ebaef1 3064 /* We ignore other flags so far. */
3b9f9a1c 3065 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3066
7198f8ce
TG		 3067 ifa = ipv6_get_ifaddr(pfx, dev, 1);
3068 if (ifa == NULL) {
3069 /*
3070 * It would be best to check for !NLM_F_CREATE here but
3071 * userspace alreay relies on not having to provide this.
3072 */
3073 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
55ebaef1 3074 ifa_flags, preferred_lft, valid_lft);
081bba5b
NT		 3075 }
3076
7198f8ce
TG		 3077 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3078 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3079 err = -EEXIST;
3080 else
55ebaef1 3081 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3082
3083 in6_ifa_put(ifa);
3084
3085 return err;
1da177e4
LT		 3086}
3087
101bb229
TG		 3088static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3089 u8 scope, int ifindex)
3090{
3091 struct ifaddrmsg *ifm;
3092
3093 ifm = nlmsg_data(nlh);
3094 ifm->ifa_family = AF_INET6;
3095 ifm->ifa_prefixlen = prefixlen;
3096 ifm->ifa_flags = flags;
3097 ifm->ifa_scope = scope;
3098 ifm->ifa_index = ifindex;
3099}
3100
85486af0
TG		 3101static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3102 unsigned long tstamp, u32 preferred, u32 valid)
3103{
3104 struct ifa_cacheinfo ci;
3105
3106 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3107 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3108 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3109 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3110 ci.ifa_prefered = preferred;
3111 ci.ifa_valid = valid;
3112
3113 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3114}
3115
101bb229
TG		 3116static inline int rt_scope(int ifa_scope)
3117{
3118 if (ifa_scope & IFA_HOST)
3119 return RT_SCOPE_HOST;
3120 else if (ifa_scope & IFA_LINK)
3121 return RT_SCOPE_LINK;
3122 else if (ifa_scope & IFA_SITE)
3123 return RT_SCOPE_SITE;
3124 else
3125 return RT_SCOPE_UNIVERSE;
3126}
3127
0ab6803b
TG		 3128static inline int inet6_ifaddr_msgsize(void)
3129{
339bf98f
TG		 3130 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3131 + nla_total_size(16) /* IFA_ADDRESS */
3132 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3133}
c5396a31 3134
1da177e4 3135static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3136 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3137{
1da177e4 3138 struct nlmsghdr *nlh;
85486af0 3139 u32 preferred, valid;
1da177e4 3140
0ab6803b
TG		 3141 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3142 if (nlh == NULL)
26932566 3143 return -EMSGSIZE;
0ab6803b 3144
101bb229
TG		 3145 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3146 ifa->idev->dev->ifindex);
3147
1da177e4 3148 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3149 preferred = ifa->prefered_lft;
3150 valid = ifa->valid_lft;
3151 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3152 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3153 preferred -= tval;
3154 if (valid != INFINITY_LIFE_TIME)
3155 valid -= tval;
1da177e4
LT		 3156 }
3157 } else {
85486af0
TG		 3158 preferred = INFINITY_LIFE_TIME;
3159 valid = INFINITY_LIFE_TIME;
3160 }
3161
0ab6803b 3162 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3163 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3164 nlmsg_cancel(skb, nlh);
3165 return -EMSGSIZE;
3166 }
1da177e4 3167
0ab6803b 3168 return nlmsg_end(skb, nlh);
1da177e4
LT		 3169}
3170
3171static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3172 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3173{
1da177e4 3174 struct nlmsghdr *nlh;
101bb229
TG		 3175 u8 scope = RT_SCOPE_UNIVERSE;
3176 int ifindex = ifmca->idev->dev->ifindex;
3177
3178 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3179 scope = RT_SCOPE_SITE;
1da177e4 3180
0ab6803b
TG		 3181 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3182 if (nlh == NULL)
26932566 3183 return -EMSGSIZE;
85486af0 3184
0ab6803b
TG		 3185 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3186 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3187 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3188 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3189 nlmsg_cancel(skb, nlh);
3190 return -EMSGSIZE;
3191 }
85486af0 3192
0ab6803b 3193 return nlmsg_end(skb, nlh);
1da177e4
LT		 3194}
3195
3196static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3197 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3198{
1da177e4 3199 struct nlmsghdr *nlh;
101bb229
TG		 3200 u8 scope = RT_SCOPE_UNIVERSE;
3201 int ifindex = ifaca->aca_idev->dev->ifindex;
3202
3203 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3204 scope = RT_SCOPE_SITE;
1da177e4 3205
0ab6803b
TG		 3206 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3207 if (nlh == NULL)
26932566 3208 return -EMSGSIZE;
85486af0 3209
0ab6803b
TG		 3210 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3211 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3212 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3213 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3214 nlmsg_cancel(skb, nlh);
3215 return -EMSGSIZE;
3216 }
1da177e4 3217
0ab6803b 3218 return nlmsg_end(skb, nlh);
1da177e4
LT		 3219}
3220
3221enum addr_type_t
3222{
3223 UNICAST_ADDR,
3224 MULTICAST_ADDR,
3225 ANYCAST_ADDR,
3226};
3227
3228static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3229 enum addr_type_t type)
3230{
3231 int idx, ip_idx;
3232 int s_idx, s_ip_idx;
3233 int err = 1;
3234 struct net_device *dev;
3235 struct inet6_dev *idev = NULL;
3236 struct inet6_ifaddr *ifa;
3237 struct ifmcaddr6 *ifmca;
3238 struct ifacaddr6 *ifaca;
3239
3240 s_idx = cb->args[0];
3241 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3242
7562f876 3243 idx = 0;
881d966b 3244 for_each_netdev(&init_net, dev) {
1da177e4 3245 if (idx < s_idx)
7562f876 3246 goto cont;
1da177e4
LT		 3247 if (idx > s_idx)
3248 s_ip_idx = 0;
3249 ip_idx = 0;
3250 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3251 goto cont;
1da177e4
LT		 3252 read_lock_bh(&idev->lock);
3253 switch (type) {
3254 case UNICAST_ADDR:
ae9cda5d 3255 /* unicast address incl. temp addr */
1da177e4
LT		 3256 for (ifa = idev->addr_list; ifa;
3257 ifa = ifa->if_next, ip_idx++) {
3258 if (ip_idx < s_ip_idx)
3259 continue;
1ab1457c
YH		 3260 if ((err = inet6_fill_ifaddr(skb, ifa,
3261 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3262 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3263 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3264 goto done;
3265 }
1da177e4
LT		 3266 break;
3267 case MULTICAST_ADDR:
3268 /* multicast address */
1ab1457c 3269 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3270 ifmca = ifmca->next, ip_idx++) {
3271 if (ip_idx < s_ip_idx)
3272 continue;
1ab1457c
YH		 3273 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3274 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3275 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3276 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3277 goto done;
3278 }
3279 break;
3280 case ANYCAST_ADDR:
3281 /* anycast address */
3282 for (ifaca = idev->ac_list; ifaca;
3283 ifaca = ifaca->aca_next, ip_idx++) {
3284 if (ip_idx < s_ip_idx)
3285 continue;
1ab1457c
YH		 3286 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3287 NETLINK_CB(cb->skb).pid,
b6544c0b 3288 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
1ab1457c 3289 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3290 goto done;
3291 }
3292 break;
3293 default:
3294 break;
3295 }
3296 read_unlock_bh(&idev->lock);
3297 in6_dev_put(idev);
7562f876
PE		 3298cont:
3299 idx++;
1da177e4
LT		 3300 }
3301done:
3302 if (err <= 0) {
3303 read_unlock_bh(&idev->lock);
3304 in6_dev_put(idev);
3305 }
1da177e4
LT		 3306 cb->args[0] = idx;
3307 cb->args[1] = ip_idx;
3308 return skb->len;
3309}
3310
3311static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3312{
3313 enum addr_type_t type = UNICAST_ADDR;
3314 return inet6_dump_addr(skb, cb, type);
3315}
3316
3317static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3318{
3319 enum addr_type_t type = MULTICAST_ADDR;
3320 return inet6_dump_addr(skb, cb, type);
3321}
3322
3323
3324static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3325{
3326 enum addr_type_t type = ANYCAST_ADDR;
3327 return inet6_dump_addr(skb, cb, type);
3328}
3329
1b29fc2c
TG		 3330static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3331 void *arg)
6c223828 3332{
1b29fc2c
TG		 3333 struct ifaddrmsg *ifm;
3334 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3335 struct in6_addr *addr = NULL;
3336 struct net_device *dev = NULL;
3337 struct inet6_ifaddr *ifa;
3338 struct sk_buff *skb;
6c223828
NT		 3339 int err;
3340
1b29fc2c
TG		 3341 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3342 if (err < 0)
3343 goto errout;
3344
3345 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3346 if (addr == NULL) {
3347 err = -EINVAL;
3348 goto errout;
6c223828 3349 }
6c223828 3350
1b29fc2c 3351 ifm = nlmsg_data(nlh);
6c223828 3352 if (ifm->ifa_index)
881d966b 3353 dev = __dev_get_by_index(&init_net, ifm->ifa_index);
6c223828 3354
1b29fc2c
TG		 3355 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3356 err = -EADDRNOTAVAIL;
3357 goto errout;
3358 }
6c223828 3359
0ab6803b 3360 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3361 err = -ENOBUFS;
1b29fc2c 3362 goto errout_ifa;
6c223828
NT		 3363 }
3364
6c223828
NT		 3365 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3366 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3367 if (err < 0) {
3368 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3369 WARN_ON(err == -EMSGSIZE);
3370 kfree_skb(skb);
3371 goto errout_ifa;
3372 }
2942e900 3373 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
1b29fc2c 3374errout_ifa:
6c223828 3375 in6_ifa_put(ifa);
1b29fc2c 3376errout:
6c223828 3377 return err;
6c223828
NT		 3378}
3379
1da177e4
LT		 3380static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3381{
3382 struct sk_buff *skb;
5d620266 3383 int err = -ENOBUFS;
1da177e4 3384
0ab6803b 3385 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3386 if (skb == NULL)
3387 goto errout;
3388
3389 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3390 if (err < 0) {
3391 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3392 WARN_ON(err == -EMSGSIZE);
3393 kfree_skb(skb);
3394 goto errout;
3395 }
5d620266
TG		 3396 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3397errout:
3398 if (err < 0)
3399 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3400}
3401
b6f99a21 3402static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3403 __s32 *array, int bytes)
3404{
04561c1f
TG		 3405 BUG_ON(bytes < (DEVCONF_MAX * 4));
3406
1da177e4
LT		 3407 memset(array, 0, bytes);
3408 array[DEVCONF_FORWARDING] = cnf->forwarding;
3409 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3410 array[DEVCONF_MTU6] = cnf->mtu6;
3411 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3412 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3413 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3414 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3415 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3416 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3417 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3418 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3419#ifdef CONFIG_IPV6_PRIVACY
3420 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3421 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3422 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3423 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3424 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3425#endif
3426 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3427 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3428 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3429#ifdef CONFIG_IPV6_ROUTER_PREF
3430 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3431 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3432#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3433 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3434#endif
930d6ff2 3435#endif
fbea49e1 3436 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3437 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3438#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3439 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3440#endif
1da177e4
LT		 3441}
3442
339bf98f
TG		 3443static inline size_t inet6_if_nlmsg_size(void)
3444{
3445 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3446 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3447 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3448 + nla_total_size(4) /* IFLA_MTU */
3449 + nla_total_size(4) /* IFLA_LINK */
3450 + nla_total_size( /* IFLA_PROTINFO */
3451 nla_total_size(4) /* IFLA_INET6_FLAGS */
3452 + nla_total_size(sizeof(struct ifla_cacheinfo))
3453 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3454 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3455 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3456 );
3457}
c5396a31 3458
7f7d9a6b
HX		 3459static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3460 int bytes)
3461{
3462 int i;
3463 int pad = bytes - sizeof(u64) * items;
3464 BUG_ON(pad < 0);
3465
3466 /* Use put_unaligned() because stats may not be aligned for u64. */
3467 put_unaligned(items, &stats[0]);
3468 for (i = 1; i < items; i++)
3469 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3470
3471 memset(&stats[items], 0, pad);
3472}
3473
3474static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3475 int bytes)
3476{
3477 switch(attrtype) {
3478 case IFLA_INET6_STATS:
3479 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3480 break;
3481 case IFLA_INET6_ICMP6STATS:
3482 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3483 break;
3484 }
3485}
3486
1ab1457c 3487static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3488 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3489{
04561c1f 3490 struct net_device *dev = idev->dev;
bf99f1bd 3491 struct nlattr *nla;
04561c1f
TG		 3492 struct ifinfomsg *hdr;
3493 struct nlmsghdr *nlh;
3494 void *protoinfo;
3495 struct ifla_cacheinfo ci;
3496
3497 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3498 if (nlh == NULL)
26932566 3499 return -EMSGSIZE;
04561c1f
TG		 3500
3501 hdr = nlmsg_data(nlh);
3502 hdr->ifi_family = AF_INET6;
3503 hdr->__ifi_pad = 0;
3504 hdr->ifi_type = dev->type;
3505 hdr->ifi_index = dev->ifindex;
3506 hdr->ifi_flags = dev_get_flags(dev);
3507 hdr->ifi_change = 0;
3508
3509 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3510
3511 if (dev->addr_len)
04561c1f 3512 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3513
04561c1f 3514 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3515 if (dev->ifindex != dev->iflink)
04561c1f 3516 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3517
04561c1f
TG		 3518 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3519 if (protoinfo == NULL)
3520 goto nla_put_failure;
1da177e4 3521
04561c1f 3522 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3523
1da177e4
LT		 3524 ci.max_reasm_len = IPV6_MAXPLEN;
3525 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3526 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3527 ci.reachable_time = idev->nd_parms->reachable_time;
3528 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3529 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3530
bf99f1bd
YH		 3531 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3532 if (nla == NULL)
04561c1f 3533 goto nla_put_failure;
bf99f1bd 3534 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3535
bf99f1bd
YH		 3536 /* XXX - MC not implemented */
3537
3538 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3539 if (nla == NULL)
3540 goto nla_put_failure;
3541 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3542
3543 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3544 if (nla == NULL)
3545 goto nla_put_failure;
3546 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3547
04561c1f
TG		 3548 nla_nest_end(skb, protoinfo);
3549 return nlmsg_end(skb, nlh);
1da177e4 3550
04561c1f 3551nla_put_failure:
26932566
PM		 3552 nlmsg_cancel(skb, nlh);
3553 return -EMSGSIZE;
1da177e4
LT		 3554}
3555
3556static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3557{
3558 int idx, err;
3559 int s_idx = cb->args[0];
3560 struct net_device *dev;
3561 struct inet6_dev *idev;
3562
3563 read_lock(&dev_base_lock);
7562f876 3564 idx = 0;
881d966b 3565 for_each_netdev(&init_net, dev) {
1da177e4 3566 if (idx < s_idx)
7562f876 3567 goto cont;
1da177e4 3568 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3569 goto cont;
1ab1457c 3570 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3571 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3572 in6_dev_put(idev);
3573 if (err <= 0)
3574 break;
7562f876
PE		 3575cont:
3576 idx++;
1da177e4
LT		 3577 }
3578 read_unlock(&dev_base_lock);
3579 cb->args[0] = idx;
3580
3581 return skb->len;
3582}
3583
3584void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3585{
3586 struct sk_buff *skb;
8d7a76c9 3587 int err = -ENOBUFS;
1ab1457c 3588
339bf98f 3589 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3590 if (skb == NULL)
3591 goto errout;
3592
3593 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3594 if (err < 0) {
3595 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3596 WARN_ON(err == -EMSGSIZE);
3597 kfree_skb(skb);
3598 goto errout;
3599 }
8d7a76c9
TG		 3600 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3601errout:
3602 if (err < 0)
3603 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3604}
3605
339bf98f
TG		 3606static inline size_t inet6_prefix_nlmsg_size(void)
3607{
3608 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3609 + nla_total_size(sizeof(struct in6_addr))
3610 + nla_total_size(sizeof(struct prefix_cacheinfo));
3611}
c5396a31 3612
1da177e4 3613static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3614 struct prefix_info *pinfo, u32 pid, u32 seq,
3615 int event, unsigned int flags)
1da177e4 3616{
6051e2f4
TG		 3617 struct prefixmsg *pmsg;
3618 struct nlmsghdr *nlh;
1da177e4
LT		 3619 struct prefix_cacheinfo ci;
3620
6051e2f4
TG		 3621 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3622 if (nlh == NULL)
26932566 3623 return -EMSGSIZE;
6051e2f4
TG		 3624
3625 pmsg = nlmsg_data(nlh);
1da177e4 3626 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3627 pmsg->prefix_pad1 = 0;
3628 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3629 pmsg->prefix_ifindex = idev->dev->ifindex;
3630 pmsg->prefix_len = pinfo->prefix_len;
3631 pmsg->prefix_type = pinfo->type;
8a47077a 3632 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3633 pmsg->prefix_flags = 0;
3634 if (pinfo->onlink)
3635 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3636 if (pinfo->autoconf)
3637 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3638
6051e2f4 3639 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3640
3641 ci.preferred_time = ntohl(pinfo->prefered);
3642 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3643 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3644
6051e2f4 3645 return nlmsg_end(skb, nlh);
1da177e4 3646
6051e2f4 3647nla_put_failure:
26932566
PM		 3648 nlmsg_cancel(skb, nlh);
3649 return -EMSGSIZE;
1da177e4
LT		 3650}
3651
1ab1457c 3652static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3653 struct prefix_info *pinfo)
3654{
3655 struct sk_buff *skb;
8c384bfa 3656 int err = -ENOBUFS;
1da177e4 3657
339bf98f 3658 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3659 if (skb == NULL)
3660 goto errout;
3661
3662 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3663 if (err < 0) {
3664 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3665 WARN_ON(err == -EMSGSIZE);
3666 kfree_skb(skb);
3667 goto errout;
3668 }
8c384bfa
TG		 3669 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3670errout:
3671 if (err < 0)
3672 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3673}
3674
1da177e4
LT		 3675static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3676{
3677 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3678
3679 switch (event) {
3680 case RTM_NEWADDR:
95c385b4
NH		 3681 /*
3682 * If the address was optimistic
3683 * we inserted the route at the start of
3684 * our DAD process, so we don't need
3685 * to do it again
3686 */
3687 if (!(ifp->rt->rt6i_node))
3688 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3689 if (ifp->idev->cnf.forwarding)
3690 addrconf_join_anycast(ifp);
3691 break;
3692 case RTM_DELADDR:
3693 if (ifp->idev->cnf.forwarding)
3694 addrconf_leave_anycast(ifp);
3695 addrconf_leave_solict(ifp->idev, &ifp->addr);
3696 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3697 if (ip6_del_rt(ifp->rt))
1da177e4 3698 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3699 break;
3700 }
3701}
3702
3703static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3704{
8814c4b5 3705 rcu_read_lock_bh();
1da177e4
LT		 3706 if (likely(ifp->idev->dead == 0))
3707 __ipv6_ifa_notify(event, ifp);
8814c4b5 3708 rcu_read_unlock_bh();
1da177e4
LT		 3709}
3710
3711#ifdef CONFIG_SYSCTL
3712
3713static
3714int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3715 void __user *buffer, size_t *lenp, loff_t *ppos)
3716{
3717 int *valp = ctl->data;
3718 int val = *valp;
3719 int ret;
3720
3721 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3722
3723 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3724 if (valp != &ipv6_devconf.forwarding) {
3725 if ((!*valp) ^ (!val)) {
3726 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3727 if (idev == NULL)
3728 return ret;
3729 dev_forward_change(idev);
3730 }
3731 } else {
3732 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3733 addrconf_forward_change();
3734 }
3735 if (*valp)
3736 rt6_purge_dflt_routers();
3737 }
3738
1ab1457c 3739 return ret;
1da177e4
LT		 3740}
3741
1ab1457c 3742static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3743 int __user *name, int nlen,
3744 void __user *oldval,
3745 size_t __user *oldlenp,
1f29bcd7 3746 void __user *newval, size_t newlen)
1da177e4
LT		 3747{
3748 int *valp = table->data;
3749 int new;
3750
3751 if (!newval || !newlen)
3752 return 0;
3753 if (newlen != sizeof(int))
3754 return -EINVAL;
3755 if (get_user(new, (int __user *)newval))
3756 return -EFAULT;
3757 if (new == *valp)
3758 return 0;
3759 if (oldval && oldlenp) {
3760 size_t len;
3761 if (get_user(len, oldlenp))
3762 return -EFAULT;
3763 if (len) {
3764 if (len > table->maxlen)
3765 len = table->maxlen;
3766 if (copy_to_user(oldval, valp, len))
3767 return -EFAULT;
3768 if (put_user(len, oldlenp))
3769 return -EFAULT;
3770 }
3771 }
3772
3773 if (valp != &ipv6_devconf_dflt.forwarding) {
3774 if (valp != &ipv6_devconf.forwarding) {
3775 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3776 int changed;
3777 if (unlikely(idev == NULL))
3778 return -ENODEV;
3779 changed = (!*valp) ^ (!new);
3780 *valp = new;
3781 if (changed)
3782 dev_forward_change(idev);
3783 } else {
3784 *valp = new;
3785 addrconf_forward_change();
3786 }
3787
3788 if (*valp)
3789 rt6_purge_dflt_routers();
3790 } else
3791 *valp = new;
3792
3793 return 1;
3794}
3795
3796static struct addrconf_sysctl_table
3797{
3798 struct ctl_table_header *sysctl_header;
3799 ctl_table addrconf_vars[__NET_IPV6_MAX];
3800 ctl_table addrconf_dev[2];
3801 ctl_table addrconf_conf_dir[2];
3802 ctl_table addrconf_proto_dir[2];
3803 ctl_table addrconf_root_dir[2];
ab32ea5d 3804} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3805 .sysctl_header = NULL,
3806 .addrconf_vars = {
1ab1457c 3807 {
1da177e4
LT		 3808 .ctl_name = NET_IPV6_FORWARDING,
3809 .procname = "forwarding",
1ab1457c 3810 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 3811 .maxlen = sizeof(int),
3812 .mode = 0644,
1ab1457c 3813 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 3814 .strategy = &addrconf_sysctl_forward_strategy,
3815 },
3816 {
3817 .ctl_name = NET_IPV6_HOP_LIMIT,
3818 .procname = "hop_limit",
1ab1457c 3819 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 3820 .maxlen = sizeof(int),
3821 .mode = 0644,
3822 .proc_handler = proc_dointvec,
3823 },
3824 {
3825 .ctl_name = NET_IPV6_MTU,
3826 .procname = "mtu",
3827 .data = &ipv6_devconf.mtu6,
1ab1457c 3828 .maxlen = sizeof(int),
1da177e4 3829 .mode = 0644,
1ab1457c 3830 .proc_handler = &proc_dointvec,
1da177e4
LT		 3831 },
3832 {
3833 .ctl_name = NET_IPV6_ACCEPT_RA,
3834 .procname = "accept_ra",
1ab1457c 3835 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 3836 .maxlen = sizeof(int),
3837 .mode = 0644,
1ab1457c 3838 .proc_handler = &proc_dointvec,
1da177e4
LT		 3839 },
3840 {
3841 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3842 .procname = "accept_redirects",
1ab1457c 3843 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 3844 .maxlen = sizeof(int),
3845 .mode = 0644,
1ab1457c 3846 .proc_handler = &proc_dointvec,
1da177e4
LT		 3847 },
3848 {
3849 .ctl_name = NET_IPV6_AUTOCONF,
3850 .procname = "autoconf",
1ab1457c 3851 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 3852 .maxlen = sizeof(int),
3853 .mode = 0644,
1ab1457c 3854 .proc_handler = &proc_dointvec,
1da177e4
LT		 3855 },
3856 {
3857 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3858 .procname = "dad_transmits",
1ab1457c 3859 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 3860 .maxlen = sizeof(int),
3861 .mode = 0644,
1ab1457c 3862 .proc_handler = &proc_dointvec,
1da177e4
LT		 3863 },
3864 {
3865 .ctl_name = NET_IPV6_RTR_SOLICITS,
3866 .procname = "router_solicitations",
1ab1457c 3867 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 3868 .maxlen = sizeof(int),
3869 .mode = 0644,
1ab1457c 3870 .proc_handler = &proc_dointvec,
1da177e4
LT		 3871 },
3872 {
3873 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3874 .procname = "router_solicitation_interval",
1ab1457c 3875 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 3876 .maxlen = sizeof(int),
3877 .mode = 0644,
1ab1457c 3878 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3879 .strategy = &sysctl_jiffies,
3880 },
3881 {
3882 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3883 .procname = "router_solicitation_delay",
1ab1457c 3884 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 3885 .maxlen = sizeof(int),
3886 .mode = 0644,
1ab1457c 3887 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3888 .strategy = &sysctl_jiffies,
3889 },
3890 {
3891 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3892 .procname = "force_mld_version",
1ab1457c 3893 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 3894 .maxlen = sizeof(int),
3895 .mode = 0644,
1ab1457c 3896 .proc_handler = &proc_dointvec,
1da177e4
LT		 3897 },
3898#ifdef CONFIG_IPV6_PRIVACY
3899 {
3900 .ctl_name = NET_IPV6_USE_TEMPADDR,
3901 .procname = "use_tempaddr",
1ab1457c 3902 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 3903 .maxlen = sizeof(int),
3904 .mode = 0644,
1ab1457c 3905 .proc_handler = &proc_dointvec,
1da177e4
LT		 3906 },
3907 {
3908 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3909 .procname = "temp_valid_lft",
1ab1457c 3910 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 3911 .maxlen = sizeof(int),
3912 .mode = 0644,
1ab1457c 3913 .proc_handler = &proc_dointvec,
1da177e4
LT		 3914 },
3915 {
3916 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3917 .procname = "temp_prefered_lft",
1ab1457c 3918 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 3919 .maxlen = sizeof(int),
3920 .mode = 0644,
1ab1457c 3921 .proc_handler = &proc_dointvec,
1da177e4
LT		 3922 },
3923 {
3924 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3925 .procname = "regen_max_retry",
1ab1457c 3926 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 3927 .maxlen = sizeof(int),
3928 .mode = 0644,
1ab1457c 3929 .proc_handler = &proc_dointvec,
1da177e4
LT		 3930 },
3931 {
3932 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3933 .procname = "max_desync_factor",
1ab1457c 3934 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 3935 .maxlen = sizeof(int),
3936 .mode = 0644,
1ab1457c 3937 .proc_handler = &proc_dointvec,
1da177e4
LT		 3938 },
3939#endif
3940 {
3941 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3942 .procname = "max_addresses",
3943 .data = &ipv6_devconf.max_addresses,
3944 .maxlen = sizeof(int),
3945 .mode = 0644,
3946 .proc_handler = &proc_dointvec,
3947 },
65f5c7c1
YH		 3948 {
3949 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3950 .procname = "accept_ra_defrtr",
1ab1457c 3951 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 3952 .maxlen = sizeof(int),
3953 .mode = 0644,
1ab1457c 3954 .proc_handler = &proc_dointvec,
65f5c7c1 3955 },
c4fd30eb
YH		 3956 {
3957 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3958 .procname = "accept_ra_pinfo",
1ab1457c 3959 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 3960 .maxlen = sizeof(int),
3961 .mode = 0644,
1ab1457c 3962 .proc_handler = &proc_dointvec,
c4fd30eb 3963 },
930d6ff2
YH		 3964#ifdef CONFIG_IPV6_ROUTER_PREF
3965 {
3966 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3967 .procname = "accept_ra_rtr_pref",
3968 .data = &ipv6_devconf.accept_ra_rtr_pref,
3969 .maxlen = sizeof(int),
3970 .mode = 0644,
3971 .proc_handler = &proc_dointvec,
3972 },
52e16356
YH		 3973 {
3974 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3975 .procname = "router_probe_interval",
3976 .data = &ipv6_devconf.rtr_probe_interval,
3977 .maxlen = sizeof(int),
3978 .mode = 0644,
3979 .proc_handler = &proc_dointvec_jiffies,
3980 .strategy = &sysctl_jiffies,
3981 },
fa03ef38 3982#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3983 {
3984 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3985 .procname = "accept_ra_rt_info_max_plen",
3986 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3987 .maxlen = sizeof(int),
3988 .mode = 0644,
3989 .proc_handler = &proc_dointvec,
3990 },
3991#endif
930d6ff2 3992#endif
fbea49e1
YH		 3993 {
3994 .ctl_name = NET_IPV6_PROXY_NDP,
3995 .procname = "proxy_ndp",
3996 .data = &ipv6_devconf.proxy_ndp,
3997 .maxlen = sizeof(int),
3998 .mode = 0644,
3999 .proc_handler = &proc_dointvec,
4000 },
0bcbc926
YH		 4001 {
4002 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4003 .procname = "accept_source_route",
4004 .data = &ipv6_devconf.accept_source_route,
4005 .maxlen = sizeof(int),
4006 .mode = 0644,
4007 .proc_handler = &proc_dointvec,
4008 },
95c385b4
NH		 4009#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4010 {
4011 .ctl_name = CTL_UNNUMBERED,
4012 .procname = "optimistic_dad",
4013 .data = &ipv6_devconf.optimistic_dad,
4014 .maxlen = sizeof(int),
4015 .mode = 0644,
4016 .proc_handler = &proc_dointvec,
4017
4018 },
4019#endif
1da177e4
LT		 4020 {
4021 .ctl_name = 0, /* sentinel */
4022 }
4023 },
4024 .addrconf_dev = {
4025 {
4026 .ctl_name = NET_PROTO_CONF_ALL,
4027 .procname = "all",
4028 .mode = 0555,
4029 .child = addrconf_sysctl.addrconf_vars,
4030 },
4031 {
4032 .ctl_name = 0, /* sentinel */
4033 }
4034 },
4035 .addrconf_conf_dir = {
4036 {
4037 .ctl_name = NET_IPV6_CONF,
4038 .procname = "conf",
4039 .mode = 0555,
4040 .child = addrconf_sysctl.addrconf_dev,
4041 },
4042 {
4043 .ctl_name = 0, /* sentinel */
4044 }
4045 },
4046 .addrconf_proto_dir = {
4047 {
4048 .ctl_name = NET_IPV6,
4049 .procname = "ipv6",
4050 .mode = 0555,
4051 .child = addrconf_sysctl.addrconf_conf_dir,
4052 },
4053 {
4054 .ctl_name = 0, /* sentinel */
4055 }
4056 },
4057 .addrconf_root_dir = {
4058 {
4059 .ctl_name = CTL_NET,
4060 .procname = "net",
4061 .mode = 0555,
4062 .child = addrconf_sysctl.addrconf_proto_dir,
4063 },
4064 {
4065 .ctl_name = 0, /* sentinel */
4066 }
4067 },
4068};
4069
4070static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
4071{
4072 int i;
4073 struct net_device *dev = idev ? idev->dev : NULL;
4074 struct addrconf_sysctl_table *t;
4075 char *dev_name = NULL;
4076
af879cc7 4077 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4
LT		 4078 if (t == NULL)
4079 return;
1da177e4
LT		 4080 for (i=0; t->addrconf_vars[i].data; i++) {
4081 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4
LT		 4082 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4083 }
4084 if (dev) {
1ab1457c 4085 dev_name = dev->name;
1da177e4
LT		 4086 t->addrconf_dev[0].ctl_name = dev->ifindex;
4087 } else {
4088 dev_name = "default";
4089 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
4090 }
4091
1ab1457c
YH		 4092 /*
4093 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4094 * by sysctl and we wouldn't want anyone to change it under our feet
4095 * (see SIOCSIFNAME).
1ab1457c 4096 */
543537bd 4097 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 4098 if (!dev_name)
4099 goto free;
4100
4101 t->addrconf_dev[0].procname = dev_name;
4102
4103 t->addrconf_dev[0].child = t->addrconf_vars;
1da177e4 4104 t->addrconf_conf_dir[0].child = t->addrconf_dev;
1da177e4 4105 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
1da177e4 4106 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
1da177e4 4107
0b4d4147 4108 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
1da177e4
LT		 4109 if (t->sysctl_header == NULL)
4110 goto free_procname;
4111 else
4112 p->sysctl = t;
4113 return;
4114
4115 /* error path */
4116 free_procname:
4117 kfree(dev_name);
4118 free:
4119 kfree(t);
4120
4121 return;
4122}
4123
4124static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
4125{
4126 if (p->sysctl) {
4127 struct addrconf_sysctl_table *t = p->sysctl;
4128 p->sysctl = NULL;
4129 unregister_sysctl_table(t->sysctl_header);
4130 kfree(t->addrconf_dev[0].procname);
4131 kfree(t);
4132 }
4133}
4134
4135
4136#endif
4137
4138/*
4139 * Device notifier
4140 */
4141
4142int register_inet6addr_notifier(struct notifier_block *nb)
4143{
1ab1457c 4144 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4145}
4146
7159039a
YH		 4147EXPORT_SYMBOL(register_inet6addr_notifier);
4148
1da177e4
LT		 4149int unregister_inet6addr_notifier(struct notifier_block *nb)
4150{
1ab1457c 4151 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4152}
4153
7159039a
YH		 4154EXPORT_SYMBOL(unregister_inet6addr_notifier);
4155
1da177e4
LT		 4156/*
4157 * Init / cleanup code
4158 */
4159
4160int __init addrconf_init(void)
4161{
2a8cc6c8
YH		 4162 int err;
4163
4164 if ((err = ipv6_addr_label_init()) < 0) {
4165 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4166 err);
4167 return err;
4168 }
1da177e4
LT		 4169
4170 /* The addrconf netdev notifier requires that loopback_dev
4171 * has it's ipv6 private information allocated and setup
4172 * before it can bring up and give link-local addresses
4173 * to other devices which are up.
4174 *
4175 * Unfortunately, loopback_dev is not necessarily the first
4176 * entry in the global dev_base list of net devices. In fact,
4177 * it is likely to be the very last entry on that list.
4178 * So this causes the notifier registry below to try and
4179 * give link-local addresses to all devices besides loopback_dev
4180 * first, then loopback_dev, which cases all the non-loopback_dev
4181 * devices to fail to get a link-local address.
4182 *
4183 * So, as a temporary fix, allocate the ipv6 structure for
4184 * loopback_dev first by hand.
4185 * Longer term, all of the dependencies ipv6 has upon the loopback
4186 * device and it being up should be removed.
4187 */
4188 rtnl_lock();
2774c7ab 4189 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4190 err = -ENOMEM;
4191 rtnl_unlock();
4192 if (err)
4193 return err;
4194
2774c7ab
EB		 4195 ip6_null_entry.u.dst.dev = init_net.loopback_dev;
4196 ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4197#ifdef CONFIG_IPV6_MULTIPLE_TABLES
2774c7ab
EB		 4198 ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
4199 ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
4200 ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
4201 ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
9a6bf6fe 4202#endif
c62dba90 4203
1da177e4
LT		 4204 register_netdevice_notifier(&ipv6_dev_notf);
4205
1da177e4 4206 addrconf_verify(0);
c127ea2c
TG		 4207
4208 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4209 if (err < 0)
4210 goto errout;
4211
4212 /* Only the first call to __rtnl_register can fail */
4213 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4214 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4215 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4216 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4217 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4218
2a8cc6c8
YH		 4219 ipv6_addr_label_rtnl_register();
4220
1da177e4
LT		 4221#ifdef CONFIG_SYSCTL
4222 addrconf_sysctl.sysctl_header =
0b4d4147 4223 register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
1da177e4
LT		 4224 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4225#endif
4226
4227 return 0;
c127ea2c
TG		 4228errout:
4229 unregister_netdevice_notifier(&ipv6_dev_notf);
4230
4231 return err;
1da177e4
LT		 4232}
4233
4234void __exit addrconf_cleanup(void)
4235{
1ab1457c 4236 struct net_device *dev;
1ab1457c 4237 struct inet6_ifaddr *ifa;
1da177e4
LT		 4238 int i;
4239
4240 unregister_netdevice_notifier(&ipv6_dev_notf);
4241
1da177e4
LT		 4242#ifdef CONFIG_SYSCTL
4243 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4244 addrconf_sysctl_unregister(&ipv6_devconf);
4245#endif
4246
4247 rtnl_lock();
4248
4249 /*
4250 * clean dev list.
4251 */
4252
881d966b 4253 for_each_netdev(&init_net, dev) {
dffe4f04 4254 if (__in6_dev_get(dev) == NULL)
1da177e4
LT		 4255 continue;
4256 addrconf_ifdown(dev, 1);
4257 }
2774c7ab 4258 addrconf_ifdown(init_net.loopback_dev, 2);
1da177e4
LT		 4259
4260 /*
4261 * Check hash table.
4262 */
4263
4264 write_lock_bh(&addrconf_hash_lock);
4265 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4266 for (ifa=inet6_addr_lst[i]; ifa; ) {
4267 struct inet6_ifaddr *bifa;
4268
4269 bifa = ifa;
4270 ifa = ifa->lst_next;
4271 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4272 /* Do not free it; something is wrong.
4273 Now we can investigate it with debugger.
4274 */
4275 }
4276 }
4277 write_unlock_bh(&addrconf_hash_lock);
4278
4279 del_timer(&addr_chk_timer);
4280
4281 rtnl_unlock();
1da177e4 4282}
Clone of davem's net-next-2.6 tree