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[IRDA] donauboe: locking fix
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / addrconf.c
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1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
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
43#include <linux/config.h>
44#include <linux/errno.h>
45#include <linux/types.h>
46#include <linux/socket.h>
47#include <linux/sockios.h>
48#include <linux/sched.h>
49#include <linux/net.h>
50#include <linux/in6.h>
51#include <linux/netdevice.h>
52#include <linux/if_arp.h>
53#include <linux/if_arcnet.h>
54#include <linux/if_infiniband.h>
55#include <linux/route.h>
56#include <linux/inetdevice.h>
57#include <linux/init.h>
58#ifdef CONFIG_SYSCTL
59#include <linux/sysctl.h>
60#endif
61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4
LT		 64
65#include <net/sock.h>
66#include <net/snmp.h>
67
68#include <net/ipv6.h>
69#include <net/protocol.h>
70#include <net/ndisc.h>
71#include <net/ip6_route.h>
72#include <net/addrconf.h>
73#include <net/tcp.h>
74#include <net/ip.h>
75#include <linux/if_tunnel.h>
76#include <linux/rtnetlink.h>
77
78#ifdef CONFIG_IPV6_PRIVACY
79#include <linux/random.h>
80#include <linux/crypto.h>
378f058c 81#include <linux/scatterlist.h>
1da177e4
LT		 82#endif
83
84#include <asm/uaccess.h>
85
86#include <linux/proc_fs.h>
87#include <linux/seq_file.h>
88
89/* Set to 3 to get tracing... */
90#define ACONF_DEBUG 2
91
92#if ACONF_DEBUG >= 3
93#define ADBG(x) printk x
94#else
95#define ADBG(x)
96#endif
97
98#define INFINITY_LIFE_TIME 0xFFFFFFFF
99#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
100
101#ifdef CONFIG_SYSCTL
102static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
103static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
104#endif
105
106#ifdef CONFIG_IPV6_PRIVACY
107static int __ipv6_regen_rndid(struct inet6_dev *idev);
108static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
109static void ipv6_regen_rndid(unsigned long data);
110
111static int desync_factor = MAX_DESYNC_FACTOR * HZ;
112static struct crypto_tfm *md5_tfm;
113static DEFINE_SPINLOCK(md5_tfm_lock);
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
124/* Protects inet6 devices */
125DEFINE_RWLOCK(addrconf_lock);
126
127static void addrconf_verify(unsigned long);
128
8d06afab 129static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 130static DEFINE_SPINLOCK(addrconf_verify_lock);
131
132static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
133static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
134
135static int addrconf_ifdown(struct net_device *dev, int how);
136
e431b8c0 137static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 138static void addrconf_dad_timer(unsigned long data);
139static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
140static void addrconf_rs_timer(unsigned long data);
141static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
142static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
143
144static void inet6_prefix_notify(int event, struct inet6_dev *idev,
145 struct prefix_info *pinfo);
146static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
147
148static struct notifier_block *inet6addr_chain;
149
150struct ipv6_devconf ipv6_devconf = {
151 .forwarding = 0,
152 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
153 .mtu6 = IPV6_MIN_MTU,
154 .accept_ra = 1,
155 .accept_redirects = 1,
156 .autoconf = 1,
157 .force_mld_version = 0,
158 .dad_transmits = 1,
159 .rtr_solicits = MAX_RTR_SOLICITATIONS,
160 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
161 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
162#ifdef CONFIG_IPV6_PRIVACY
163 .use_tempaddr = 0,
164 .temp_valid_lft = TEMP_VALID_LIFETIME,
165 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
166 .regen_max_retry = REGEN_MAX_RETRY,
167 .max_desync_factor = MAX_DESYNC_FACTOR,
168#endif
169 .max_addresses = IPV6_MAX_ADDRESSES,
170};
171
172static struct ipv6_devconf ipv6_devconf_dflt = {
173 .forwarding = 0,
174 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
175 .mtu6 = IPV6_MIN_MTU,
176 .accept_ra = 1,
177 .accept_redirects = 1,
178 .autoconf = 1,
179 .dad_transmits = 1,
180 .rtr_solicits = MAX_RTR_SOLICITATIONS,
181 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
182 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
183#ifdef CONFIG_IPV6_PRIVACY
184 .use_tempaddr = 0,
185 .temp_valid_lft = TEMP_VALID_LIFETIME,
186 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
187 .regen_max_retry = REGEN_MAX_RETRY,
188 .max_desync_factor = MAX_DESYNC_FACTOR,
189#endif
190 .max_addresses = IPV6_MAX_ADDRESSES,
191};
192
193/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
194#if 0
195const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
196#endif
197const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
198
b1cacb68
YH		 199#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
200
201static inline unsigned ipv6_addr_scope2type(unsigned scope)
202{
203 switch(scope) {
204 case IPV6_ADDR_SCOPE_NODELOCAL:
205 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
206 IPV6_ADDR_LOOPBACK);
207 case IPV6_ADDR_SCOPE_LINKLOCAL:
208 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
209 IPV6_ADDR_LINKLOCAL);
210 case IPV6_ADDR_SCOPE_SITELOCAL:
211 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
212 IPV6_ADDR_SITELOCAL);
213 }
214 return IPV6_ADDR_SCOPE_TYPE(scope);
215}
216
217int __ipv6_addr_type(const struct in6_addr *addr)
1da177e4 218{
1da177e4
LT		 219 u32 st;
220
221 st = addr->s6_addr32[0];
222
1da177e4 223 /* Consider all addresses with the first three bits different of
b1cacb68 224 000 and 111 as unicasts.
1da177e4
LT		 225 */
226 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
227 (st & htonl(0xE0000000)) != htonl(0xE0000000))
b1cacb68
YH		 228 return (IPV6_ADDR_UNICAST |
229 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
1da177e4 230
b1cacb68
YH		 231 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
232 /* multicast */
233 /* addr-select 3.1 */
234 return (IPV6_ADDR_MULTICAST |
235 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
236 }
237
238 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
239 return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
240 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
1da177e4 241 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
b1cacb68
YH		 242 return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
243 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
1da177e4
LT		 244
245 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
246 if (addr->s6_addr32[2] == 0) {
247 if (addr->s6_addr32[3] == 0)
248 return IPV6_ADDR_ANY;
249
250 if (addr->s6_addr32[3] == htonl(0x00000001))
b1cacb68
YH		 251 return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
252 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
1da177e4 253
b1cacb68
YH		 254 return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
255 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 256 }
257
258 if (addr->s6_addr32[2] == htonl(0x0000ffff))
b1cacb68
YH		 259 return (IPV6_ADDR_MAPPED |
260 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 261 }
262
b1cacb68
YH		 263 return (IPV6_ADDR_RESERVED |
264 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
1da177e4
LT		 265}
266
267static void addrconf_del_timer(struct inet6_ifaddr *ifp)
268{
269 if (del_timer(&ifp->timer))
270 __in6_ifa_put(ifp);
271}
272
273enum addrconf_timer_t
274{
275 AC_NONE,
276 AC_DAD,
277 AC_RS,
278};
279
280static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
281 enum addrconf_timer_t what,
282 unsigned long when)
283{
284 if (!del_timer(&ifp->timer))
285 in6_ifa_hold(ifp);
286
287 switch (what) {
288 case AC_DAD:
289 ifp->timer.function = addrconf_dad_timer;
290 break;
291 case AC_RS:
292 ifp->timer.function = addrconf_rs_timer;
293 break;
294 default:;
295 }
296 ifp->timer.expires = jiffies + when;
297 add_timer(&ifp->timer);
298}
299
300/* Nobody refers to this device, we may destroy it. */
301
302void in6_dev_finish_destroy(struct inet6_dev *idev)
303{
304 struct net_device *dev = idev->dev;
305 BUG_TRAP(idev->addr_list==NULL);
306 BUG_TRAP(idev->mc_list==NULL);
307#ifdef NET_REFCNT_DEBUG
308 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
309#endif
310 dev_put(dev);
311 if (!idev->dead) {
312 printk("Freeing alive inet6 device %p\n", idev);
313 return;
314 }
315 snmp6_free_dev(idev);
316 kfree(idev);
317}
318
319static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
320{
321 struct inet6_dev *ndev;
322
323 ASSERT_RTNL();
324
325 if (dev->mtu < IPV6_MIN_MTU)
326 return NULL;
327
328 ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
329
330 if (ndev) {
331 memset(ndev, 0, sizeof(struct inet6_dev));
332
333 rwlock_init(&ndev->lock);
334 ndev->dev = dev;
335 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
336 ndev->cnf.mtu6 = dev->mtu;
337 ndev->cnf.sysctl = NULL;
338 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
339 if (ndev->nd_parms == NULL) {
340 kfree(ndev);
341 return NULL;
342 }
343 /* We refer to the device */
344 dev_hold(dev);
345
346 if (snmp6_alloc_dev(ndev) < 0) {
347 ADBG((KERN_WARNING
348 "%s(): cannot allocate memory for statistics; dev=%s.\n",
349 __FUNCTION__, dev->name));
350 neigh_parms_release(&nd_tbl, ndev->nd_parms);
351 ndev->dead = 1;
352 in6_dev_finish_destroy(ndev);
353 return NULL;
354 }
355
356 if (snmp6_register_dev(ndev) < 0) {
357 ADBG((KERN_WARNING
358 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
359 __FUNCTION__, dev->name));
360 neigh_parms_release(&nd_tbl, ndev->nd_parms);
361 ndev->dead = 1;
362 in6_dev_finish_destroy(ndev);
363 return NULL;
364 }
365
366 /* One reference from device. We must do this before
367 * we invoke __ipv6_regen_rndid().
368 */
369 in6_dev_hold(ndev);
370
371#ifdef CONFIG_IPV6_PRIVACY
372 get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
373 get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
374 init_timer(&ndev->regen_timer);
375 ndev->regen_timer.function = ipv6_regen_rndid;
376 ndev->regen_timer.data = (unsigned long) ndev;
377 if ((dev->flags&IFF_LOOPBACK) ||
378 dev->type == ARPHRD_TUNNEL ||
77bd9196 379 dev->type == ARPHRD_NONE ||
1da177e4
LT		 380 dev->type == ARPHRD_SIT) {
381 printk(KERN_INFO
382 "Disabled Privacy Extensions on device %p(%s)\n",
383 dev, dev->name);
384 ndev->cnf.use_tempaddr = -1;
385 } else {
386 in6_dev_hold(ndev);
387 ipv6_regen_rndid((unsigned long) ndev);
388 }
389#endif
390
391 write_lock_bh(&addrconf_lock);
392 dev->ip6_ptr = ndev;
393 write_unlock_bh(&addrconf_lock);
394
395 ipv6_mc_init_dev(ndev);
396 ndev->tstamp = jiffies;
397#ifdef CONFIG_SYSCTL
398 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
399 NET_IPV6_NEIGH, "ipv6",
400 &ndisc_ifinfo_sysctl_change,
401 NULL);
402 addrconf_sysctl_register(ndev, &ndev->cnf);
403#endif
404 }
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 }
418 if (dev->flags&IFF_UP)
419 ipv6_mc_up(idev);
420 return idev;
421}
422
423#ifdef CONFIG_SYSCTL
424static void dev_forward_change(struct inet6_dev *idev)
425{
426 struct net_device *dev;
427 struct inet6_ifaddr *ifa;
428 struct in6_addr addr;
429
430 if (!idev)
431 return;
432 dev = idev->dev;
433 if (dev && (dev->flags & IFF_MULTICAST)) {
434 ipv6_addr_all_routers(&addr);
435
436 if (idev->cnf.forwarding)
437 ipv6_dev_mc_inc(dev, &addr);
438 else
439 ipv6_dev_mc_dec(dev, &addr);
440 }
441 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
442 if (idev->cnf.forwarding)
443 addrconf_join_anycast(ifa);
444 else
445 addrconf_leave_anycast(ifa);
446 }
447}
448
449
450static void addrconf_forward_change(void)
451{
452 struct net_device *dev;
453 struct inet6_dev *idev;
454
455 read_lock(&dev_base_lock);
456 for (dev=dev_base; dev; dev=dev->next) {
457 read_lock(&addrconf_lock);
458 idev = __in6_dev_get(dev);
459 if (idev) {
460 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
461 idev->cnf.forwarding = ipv6_devconf.forwarding;
462 if (changed)
463 dev_forward_change(idev);
464 }
465 read_unlock(&addrconf_lock);
466 }
467 read_unlock(&dev_base_lock);
468}
469#endif
470
471/* Nobody refers to this ifaddr, destroy it */
472
473void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
474{
475 BUG_TRAP(ifp->if_next==NULL);
476 BUG_TRAP(ifp->lst_next==NULL);
477#ifdef NET_REFCNT_DEBUG
478 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
479#endif
480
481 in6_dev_put(ifp->idev);
482
483 if (del_timer(&ifp->timer))
484 printk("Timer is still running, when freeing ifa=%p\n", ifp);
485
486 if (!ifp->dead) {
487 printk("Freeing alive inet6 address %p\n", ifp);
488 return;
489 }
490 dst_release(&ifp->rt->u.dst);
491
492 kfree(ifp);
493}
494
495/* On success it returns ifp with increased reference count */
496
497static struct inet6_ifaddr *
498ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 499 int scope, u32 flags)
1da177e4
LT		 500{
501 struct inet6_ifaddr *ifa = NULL;
502 struct rt6_info *rt;
503 int hash;
504 int err = 0;
505
506 read_lock_bh(&addrconf_lock);
507 if (idev->dead) {
508 err = -ENODEV; /*XXX*/
509 goto out2;
510 }
511
512 write_lock(&addrconf_hash_lock);
513
514 /* Ignore adding duplicate addresses on an interface */
515 if (ipv6_chk_same_addr(addr, idev->dev)) {
516 ADBG(("ipv6_add_addr: already assigned\n"));
517 err = -EEXIST;
518 goto out;
519 }
520
521 ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
522
523 if (ifa == NULL) {
524 ADBG(("ipv6_add_addr: malloc failed\n"));
525 err = -ENOBUFS;
526 goto out;
527 }
528
529 rt = addrconf_dst_alloc(idev, addr, 0);
530 if (IS_ERR(rt)) {
531 err = PTR_ERR(rt);
532 goto out;
533 }
534
535 memset(ifa, 0, sizeof(struct inet6_ifaddr));
536 ipv6_addr_copy(&ifa->addr, addr);
537
538 spin_lock_init(&ifa->lock);
539 init_timer(&ifa->timer);
540 ifa->timer.data = (unsigned long) ifa;
541 ifa->scope = scope;
542 ifa->prefix_len = pfxlen;
543 ifa->flags = flags | IFA_F_TENTATIVE;
544 ifa->cstamp = ifa->tstamp = jiffies;
545
546 ifa->idev = idev;
547 in6_dev_hold(idev);
548 /* For caller */
549 in6_ifa_hold(ifa);
550
551 /* Add to big hash table */
552 hash = ipv6_addr_hash(addr);
553
554 ifa->lst_next = inet6_addr_lst[hash];
555 inet6_addr_lst[hash] = ifa;
556 in6_ifa_hold(ifa);
557 write_unlock(&addrconf_hash_lock);
558
559 write_lock(&idev->lock);
560 /* Add to inet6_dev unicast addr list. */
561 ifa->if_next = idev->addr_list;
562 idev->addr_list = ifa;
563
564#ifdef CONFIG_IPV6_PRIVACY
565 if (ifa->flags&IFA_F_TEMPORARY) {
566 ifa->tmp_next = idev->tempaddr_list;
567 idev->tempaddr_list = ifa;
568 in6_ifa_hold(ifa);
569 }
570#endif
571
572 ifa->rt = rt;
573
574 in6_ifa_hold(ifa);
575 write_unlock(&idev->lock);
576out2:
577 read_unlock_bh(&addrconf_lock);
578
fd92833a 579 if (likely(err == 0))
1da177e4
LT		 580 notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
581 else {
582 kfree(ifa);
583 ifa = ERR_PTR(err);
584 }
585
586 return ifa;
587out:
588 write_unlock(&addrconf_hash_lock);
589 goto out2;
590}
591
592/* This function wants to get referenced ifp and releases it before return */
593
594static void ipv6_del_addr(struct inet6_ifaddr *ifp)
595{
596 struct inet6_ifaddr *ifa, **ifap;
597 struct inet6_dev *idev = ifp->idev;
598 int hash;
599 int deleted = 0, onlink = 0;
600 unsigned long expires = jiffies;
601
602 hash = ipv6_addr_hash(&ifp->addr);
603
604 ifp->dead = 1;
605
606 write_lock_bh(&addrconf_hash_lock);
607 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
608 ifap = &ifa->lst_next) {
609 if (ifa == ifp) {
610 *ifap = ifa->lst_next;
611 __in6_ifa_put(ifp);
612 ifa->lst_next = NULL;
613 break;
614 }
615 }
616 write_unlock_bh(&addrconf_hash_lock);
617
618 write_lock_bh(&idev->lock);
619#ifdef CONFIG_IPV6_PRIVACY
620 if (ifp->flags&IFA_F_TEMPORARY) {
621 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
622 ifap = &ifa->tmp_next) {
623 if (ifa == ifp) {
624 *ifap = ifa->tmp_next;
625 if (ifp->ifpub) {
626 in6_ifa_put(ifp->ifpub);
627 ifp->ifpub = NULL;
628 }
629 __in6_ifa_put(ifp);
630 ifa->tmp_next = NULL;
631 break;
632 }
633 }
634 }
635#endif
636
637 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
638 ifap = &ifa->if_next) {
639 if (ifa == ifp) {
640 *ifap = ifa->if_next;
641 __in6_ifa_put(ifp);
642 ifa->if_next = NULL;
643 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
644 break;
645 deleted = 1;
646 } else if (ifp->flags & IFA_F_PERMANENT) {
647 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
648 ifp->prefix_len)) {
649 if (ifa->flags & IFA_F_PERMANENT) {
650 onlink = 1;
651 if (deleted)
652 break;
653 } else {
654 unsigned long lifetime;
655
656 if (!onlink)
657 onlink = -1;
658
659 spin_lock(&ifa->lock);
660 lifetime = min_t(unsigned long,
661 ifa->valid_lft, 0x7fffffffUL/HZ);
662 if (time_before(expires,
663 ifa->tstamp + lifetime * HZ))
664 expires = ifa->tstamp + lifetime * HZ;
665 spin_unlock(&ifa->lock);
666 }
667 }
668 }
669 }
670 write_unlock_bh(&idev->lock);
671
672 ipv6_ifa_notify(RTM_DELADDR, ifp);
673
674 notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
675
676 addrconf_del_timer(ifp);
677
678 /*
679 * Purge or update corresponding prefix
680 *
681 * 1) we don't purge prefix here if address was not permanent.
682 * prefix is managed by its own lifetime.
683 * 2) if there're no addresses, delete prefix.
684 * 3) if there're still other permanent address(es),
685 * corresponding prefix is still permanent.
686 * 4) otherwise, update prefix lifetime to the
687 * longest valid lifetime among the corresponding
688 * addresses on the device.
689 * Note: subsequent RA will update lifetime.
690 *
691 * --yoshfuji
692 */
693 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
694 struct in6_addr prefix;
695 struct rt6_info *rt;
696
697 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
698 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
699
700 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
701 if (onlink == 0) {
0d51aa80 702 ip6_del_rt(rt, NULL, NULL, NULL);
1da177e4
LT		 703 rt = NULL;
704 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
705 rt->rt6i_expires = expires;
706 rt->rt6i_flags |= RTF_EXPIRES;
707 }
708 }
709 dst_release(&rt->u.dst);
710 }
711
712 in6_ifa_put(ifp);
713}
714
715#ifdef CONFIG_IPV6_PRIVACY
716static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
717{
718 struct inet6_dev *idev = ifp->idev;
719 struct in6_addr addr, *tmpaddr;
720 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
721 int tmp_plen;
722 int ret = 0;
723 int max_addresses;
724
725 write_lock(&idev->lock);
726 if (ift) {
727 spin_lock_bh(&ift->lock);
728 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
729 spin_unlock_bh(&ift->lock);
730 tmpaddr = &addr;
731 } else {
732 tmpaddr = NULL;
733 }
734retry:
735 in6_dev_hold(idev);
736 if (idev->cnf.use_tempaddr <= 0) {
737 write_unlock(&idev->lock);
738 printk(KERN_INFO
739 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
740 in6_dev_put(idev);
741 ret = -1;
742 goto out;
743 }
744 spin_lock_bh(&ifp->lock);
745 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
746 idev->cnf.use_tempaddr = -1; /*XXX*/
747 spin_unlock_bh(&ifp->lock);
748 write_unlock(&idev->lock);
749 printk(KERN_WARNING
750 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
751 in6_dev_put(idev);
752 ret = -1;
753 goto out;
754 }
755 in6_ifa_hold(ifp);
756 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
757 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
758 spin_unlock_bh(&ifp->lock);
759 write_unlock(&idev->lock);
760 printk(KERN_WARNING
761 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
762 in6_ifa_put(ifp);
763 in6_dev_put(idev);
764 ret = -1;
765 goto out;
766 }
767 memcpy(&addr.s6_addr[8], idev->rndid, 8);
768 tmp_valid_lft = min_t(__u32,
769 ifp->valid_lft,
770 idev->cnf.temp_valid_lft);
771 tmp_prefered_lft = min_t(__u32,
772 ifp->prefered_lft,
773 idev->cnf.temp_prefered_lft - desync_factor / HZ);
774 tmp_plen = ifp->prefix_len;
775 max_addresses = idev->cnf.max_addresses;
776 tmp_cstamp = ifp->cstamp;
777 tmp_tstamp = ifp->tstamp;
778 spin_unlock_bh(&ifp->lock);
779
780 write_unlock(&idev->lock);
781 ift = !max_addresses ||
782 ipv6_count_addresses(idev) < max_addresses ?
783 ipv6_add_addr(idev, &addr, tmp_plen,
784 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
785 if (!ift || IS_ERR(ift)) {
786 in6_ifa_put(ifp);
787 in6_dev_put(idev);
788 printk(KERN_INFO
789 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
790 tmpaddr = &addr;
791 write_lock(&idev->lock);
792 goto retry;
793 }
794
795 spin_lock_bh(&ift->lock);
796 ift->ifpub = ifp;
797 ift->valid_lft = tmp_valid_lft;
798 ift->prefered_lft = tmp_prefered_lft;
799 ift->cstamp = tmp_cstamp;
800 ift->tstamp = tmp_tstamp;
801 spin_unlock_bh(&ift->lock);
802
803 addrconf_dad_start(ift, 0);
804 in6_ifa_put(ift);
805 in6_dev_put(idev);
806out:
807 return ret;
808}
809#endif
810
811/*
072047e4 812 * Choose an appropriate source address (RFC3484)
1da177e4 813 */
072047e4
YH		 814struct ipv6_saddr_score {
815 int addr_type;
816 unsigned int attrs;
817 int matchlen;
818 unsigned int scope;
819 unsigned int rule;
820};
821
822#define IPV6_SADDR_SCORE_LOCAL 0x0001
823#define IPV6_SADDR_SCORE_PREFERRED 0x0004
824#define IPV6_SADDR_SCORE_HOA 0x0008
825#define IPV6_SADDR_SCORE_OIF 0x0010
826#define IPV6_SADDR_SCORE_LABEL 0x0020
827#define IPV6_SADDR_SCORE_PRIVACY 0x0040
828
829static int inline ipv6_saddr_preferred(int type)
1da177e4 830{
072047e4
YH		 831 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
832 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
833 return 1;
834 return 0;
1da177e4
LT		 835}
836
072047e4
YH		 837/* static matching label */
838static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
839{
840 /*
841 * prefix (longest match) label
842 * -----------------------------
843 * ::1/128 0
844 * ::/0 1
845 * 2002::/16 2
846 * ::/96 3
847 * ::ffff:0:0/96 4
848 */
849 if (type & IPV6_ADDR_LOOPBACK)
850 return 0;
851 else if (type & IPV6_ADDR_COMPATv4)
852 return 3;
853 else if (type & IPV6_ADDR_MAPPED)
854 return 4;
855 else if (addr->s6_addr16[0] == htons(0x2002))
856 return 2;
857 return 1;
858}
1da177e4 859
072047e4 860int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 861 struct in6_addr *daddr, struct in6_addr *saddr)
862{
072047e4
YH		 863 struct ipv6_saddr_score hiscore;
864 struct inet6_ifaddr *ifa_result = NULL;
865 int daddr_type = __ipv6_addr_type(daddr);
866 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
867 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
868 struct net_device *dev;
1da177e4 869
072047e4 870 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 871
072047e4
YH		 872 read_lock(&dev_base_lock);
873 read_lock(&addrconf_lock);
1da177e4 874
072047e4
YH		 875 for (dev = dev_base; dev; dev=dev->next) {
876 struct inet6_dev *idev;
877 struct inet6_ifaddr *ifa;
878
879 /* Rule 0: Candidate Source Address (section 4)
880 * - multicast and link-local destination address,
881 * the set of candidate source address MUST only
882 * include addresses assigned to interfaces
883 * belonging to the same link as the outgoing
884 * interface.
885 * (- For site-local destination addresses, the
886 * set of candidate source addresses MUST only
887 * include addresses assigned to interfaces
888 * belonging to the same site as the outgoing
889 * interface.)
890 */
891 if ((daddr_type & IPV6_ADDR_MULTICAST ||
892 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
893 daddr_dev && dev != daddr_dev)
894 continue;
1da177e4 895
1da177e4 896 idev = __in6_dev_get(dev);
072047e4
YH		 897 if (!idev)
898 continue;
899
900 read_lock_bh(&idev->lock);
901 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
902 struct ipv6_saddr_score score;
903
904 score.addr_type = __ipv6_addr_type(&ifa->addr);
905
906 /* Rule 0: Candidate Source Address (section 4)
907 * - In any case, anycast addresses, multicast
908 * addresses, and the unspecified address MUST
909 * NOT be included in a candidate set.
910 */
911 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
912 score.addr_type & IPV6_ADDR_MULTICAST)) {
913 LIMIT_NETDEBUG(KERN_DEBUG
914 "ADDRCONF: unspecified / multicast address"
915 "assigned as unicast address on %s",
916 dev->name);
917 continue;
918 }
919
920 score.attrs = 0;
921 score.matchlen = 0;
922 score.scope = 0;
923 score.rule = 0;
924
925 if (ifa_result == NULL) {
926 /* record it if the first available entry */
927 goto record_it;
928 }
929
930 /* Rule 1: Prefer same address */
931 if (hiscore.rule < 1) {
932 if (ipv6_addr_equal(&ifa_result->addr, daddr))
933 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
934 hiscore.rule++;
935 }
936 if (ipv6_addr_equal(&ifa->addr, daddr)) {
937 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
938 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
939 score.rule = 1;
940 goto record_it;
1da177e4 941 }
072047e4
YH		 942 } else {
943 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
944 continue;
1da177e4 945 }
1da177e4 946
072047e4
YH		 947 /* Rule 2: Prefer appropriate scope */
948 if (hiscore.rule < 2) {
949 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
950 hiscore.rule++;
951 }
952 score.scope = __ipv6_addr_src_scope(score.addr_type);
953 if (hiscore.scope < score.scope) {
954 if (hiscore.scope < daddr_scope) {
955 score.rule = 2;
956 goto record_it;
957 } else
958 continue;
959 } else if (score.scope < hiscore.scope) {
960 if (score.scope < daddr_scope)
961 continue;
962 else {
963 score.rule = 2;
964 goto record_it;
965 }
966 }
1da177e4 967
072047e4
YH		 968 /* Rule 3: Avoid deprecated address */
969 if (hiscore.rule < 3) {
970 if (ipv6_saddr_preferred(hiscore.addr_type) ||
971 !(ifa_result->flags & IFA_F_DEPRECATED))
972 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
973 hiscore.rule++;
974 }
975 if (ipv6_saddr_preferred(score.addr_type) ||
976 !(ifa->flags & IFA_F_DEPRECATED)) {
977 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
978 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
979 score.rule = 3;
980 goto record_it;
981 }
982 } else {
983 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
984 continue;
985 }
1da177e4 986
072047e4
YH		 987 /* Rule 4: Prefer home address -- not implemented yet */
988
989 /* Rule 5: Prefer outgoing interface */
990 if (hiscore.rule < 5) {
991 if (daddr_dev == NULL ||
992 daddr_dev == ifa_result->idev->dev)
993 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
994 hiscore.rule++;
995 }
996 if (daddr_dev == NULL ||
997 daddr_dev == ifa->idev->dev) {
998 score.attrs |= IPV6_SADDR_SCORE_OIF;
999 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1000 score.rule = 5;
1001 goto record_it;
1002 }
1003 } else {
1004 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1005 continue;
1006 }
1007
1008 /* Rule 6: Prefer matching label */
1009 if (hiscore.rule < 6) {
1010 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1011 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1012 hiscore.rule++;
1013 }
1014 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1015 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1016 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1017 score.rule = 6;
1018 goto record_it;
1da177e4 1019 }
072047e4
YH		 1020 } else {
1021 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1022 continue;
1023 }
1024
1025 /* Rule 7: Prefer public address
1026 * Note: prefer temprary address if use_tempaddr >= 2
1027 */
1028 if (hiscore.rule < 7) {
1029 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1030 (ifa_result->idev->cnf.use_tempaddr >= 2))
1031 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1032 hiscore.rule++;
1033 }
1034 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1035 (ifa->idev->cnf.use_tempaddr >= 2)) {
1036 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1037 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1038 score.rule = 7;
1039 goto record_it;
1040 }
1041 } else {
1042 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1043 continue;
1044 }
1045
1046 /* Rule 8: Use longest matching prefix */
1047 if (hiscore.rule < 8)
1048 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
1049 score.rule++;
1050 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1051 if (score.matchlen > hiscore.matchlen) {
1052 score.rule = 8;
1053 goto record_it;
1da177e4 1054 }
072047e4
YH		 1055#if 0
1056 else if (score.matchlen < hiscore.matchlen)
1057 continue;
1058#endif
1059
1060 /* Final Rule: choose first available one */
1061 continue;
1062record_it:
1063 if (ifa_result)
1064 in6_ifa_put(ifa_result);
1065 in6_ifa_hold(ifa);
1066 ifa_result = ifa;
1067 hiscore = score;
1da177e4 1068 }
072047e4 1069 read_unlock_bh(&idev->lock);
1da177e4 1070 }
1da177e4
LT		 1071 read_unlock(&addrconf_lock);
1072 read_unlock(&dev_base_lock);
1073
072047e4
YH		 1074 if (!ifa_result)
1075 return -EADDRNOTAVAIL;
1076
1077 ipv6_addr_copy(saddr, &ifa_result->addr);
1078 in6_ifa_put(ifa_result);
1079 return 0;
1da177e4
LT		 1080}
1081
1082
1083int ipv6_get_saddr(struct dst_entry *dst,
1084 struct in6_addr *daddr, struct in6_addr *saddr)
1085{
1086 return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
1087}
1088
1089
1090int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1091{
1092 struct inet6_dev *idev;
1093 int err = -EADDRNOTAVAIL;
1094
1095 read_lock(&addrconf_lock);
1096 if ((idev = __in6_dev_get(dev)) != NULL) {
1097 struct inet6_ifaddr *ifp;
1098
1099 read_lock_bh(&idev->lock);
1100 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1101 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1102 ipv6_addr_copy(addr, &ifp->addr);
1103 err = 0;
1104 break;
1105 }
1106 }
1107 read_unlock_bh(&idev->lock);
1108 }
1109 read_unlock(&addrconf_lock);
1110 return err;
1111}
1112
1113static int ipv6_count_addresses(struct inet6_dev *idev)
1114{
1115 int cnt = 0;
1116 struct inet6_ifaddr *ifp;
1117
1118 read_lock_bh(&idev->lock);
1119 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1120 cnt++;
1121 read_unlock_bh(&idev->lock);
1122 return cnt;
1123}
1124
1125int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1126{
1127 struct inet6_ifaddr * ifp;
1128 u8 hash = ipv6_addr_hash(addr);
1129
1130 read_lock_bh(&addrconf_hash_lock);
1131 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1132 if (ipv6_addr_equal(&ifp->addr, addr) &&
1133 !(ifp->flags&IFA_F_TENTATIVE)) {
1134 if (dev == NULL || ifp->idev->dev == dev ||
1135 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1136 break;
1137 }
1138 }
1139 read_unlock_bh(&addrconf_hash_lock);
1140 return ifp != NULL;
1141}
1142
1143static
1144int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1145{
1146 struct inet6_ifaddr * ifp;
1147 u8 hash = ipv6_addr_hash(addr);
1148
1149 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1150 if (ipv6_addr_equal(&ifp->addr, addr)) {
1151 if (dev == NULL || ifp->idev->dev == dev)
1152 break;
1153 }
1154 }
1155 return ifp != NULL;
1156}
1157
1158struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1159{
1160 struct inet6_ifaddr * ifp;
1161 u8 hash = ipv6_addr_hash(addr);
1162
1163 read_lock_bh(&addrconf_hash_lock);
1164 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1165 if (ipv6_addr_equal(&ifp->addr, addr)) {
1166 if (dev == NULL || ifp->idev->dev == dev ||
1167 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1168 in6_ifa_hold(ifp);
1169 break;
1170 }
1171 }
1172 }
1173 read_unlock_bh(&addrconf_hash_lock);
1174
1175 return ifp;
1176}
1177
1178int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1179{
1180 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1181 const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
1182 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
8feaf0c0 1183 u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1184 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1185 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1186 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1187 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1188
1189 if (!sk2_rcv_saddr && !sk_ipv6only)
1190 return 1;
1191
1192 if (addr_type2 == IPV6_ADDR_ANY &&
1193 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1194 return 1;
1195
1196 if (addr_type == IPV6_ADDR_ANY &&
1197 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1198 return 1;
1199
1200 if (sk2_rcv_saddr6 &&
1201 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1202 return 1;
1203
1204 if (addr_type == IPV6_ADDR_MAPPED &&
1205 !sk2_ipv6only &&
1206 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1207 return 1;
1208
1209 return 0;
1210}
1211
1212/* Gets referenced address, destroys ifaddr */
1213
1214void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1215{
1216 if (net_ratelimit())
1217 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1218 if (ifp->flags&IFA_F_PERMANENT) {
1219 spin_lock_bh(&ifp->lock);
1220 addrconf_del_timer(ifp);
1221 ifp->flags |= IFA_F_TENTATIVE;
1222 spin_unlock_bh(&ifp->lock);
1223 in6_ifa_put(ifp);
1224#ifdef CONFIG_IPV6_PRIVACY
1225 } else if (ifp->flags&IFA_F_TEMPORARY) {
1226 struct inet6_ifaddr *ifpub;
1227 spin_lock_bh(&ifp->lock);
1228 ifpub = ifp->ifpub;
1229 if (ifpub) {
1230 in6_ifa_hold(ifpub);
1231 spin_unlock_bh(&ifp->lock);
1232 ipv6_create_tempaddr(ifpub, ifp);
1233 in6_ifa_put(ifpub);
1234 } else {
1235 spin_unlock_bh(&ifp->lock);
1236 }
1237 ipv6_del_addr(ifp);
1238#endif
1239 } else
1240 ipv6_del_addr(ifp);
1241}
1242
1243
1244/* Join to solicited addr multicast group. */
1245
1246void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1247{
1248 struct in6_addr maddr;
1249
1250 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1251 return;
1252
1253 addrconf_addr_solict_mult(addr, &maddr);
1254 ipv6_dev_mc_inc(dev, &maddr);
1255}
1256
1257void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1258{
1259 struct in6_addr maddr;
1260
1261 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1262 return;
1263
1264 addrconf_addr_solict_mult(addr, &maddr);
1265 __ipv6_dev_mc_dec(idev, &maddr);
1266}
1267
20380731 1268static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1269{
1270 struct in6_addr addr;
1271 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1272 if (ipv6_addr_any(&addr))
1273 return;
1274 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1275}
1276
20380731 1277static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1278{
1279 struct in6_addr addr;
1280 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1281 if (ipv6_addr_any(&addr))
1282 return;
1283 __ipv6_dev_ac_dec(ifp->idev, &addr);
1284}
1285
1286static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1287{
1288 switch (dev->type) {
1289 case ARPHRD_ETHER:
1290 case ARPHRD_FDDI:
1291 case ARPHRD_IEEE802_TR:
1292 if (dev->addr_len != ETH_ALEN)
1293 return -1;
1294 memcpy(eui, dev->dev_addr, 3);
1295 memcpy(eui + 5, dev->dev_addr + 3, 3);
1296
1297 /*
1298 * The zSeries OSA network cards can be shared among various
1299 * OS instances, but the OSA cards have only one MAC address.
1300 * This leads to duplicate address conflicts in conjunction
1301 * with IPv6 if more than one instance uses the same card.
1302 *
1303 * The driver for these cards can deliver a unique 16-bit
1304 * identifier for each instance sharing the same card. It is
1305 * placed instead of 0xFFFE in the interface identifier. The
1306 * "u" bit of the interface identifier is not inverted in this
1307 * case. Hence the resulting interface identifier has local
1308 * scope according to RFC2373.
1309 */
1310 if (dev->dev_id) {
1311 eui[3] = (dev->dev_id >> 8) & 0xFF;
1312 eui[4] = dev->dev_id & 0xFF;
1313 } else {
1314 eui[3] = 0xFF;
1315 eui[4] = 0xFE;
1316 eui[0] ^= 2;
1317 }
1318 return 0;
1319 case ARPHRD_ARCNET:
1320 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1321 if (dev->addr_len != ARCNET_ALEN)
1322 return -1;
1323 memset(eui, 0, 7);
1324 eui[7] = *(u8*)dev->dev_addr;
1325 return 0;
1326 case ARPHRD_INFINIBAND:
1327 if (dev->addr_len != INFINIBAND_ALEN)
1328 return -1;
1329 memcpy(eui, dev->dev_addr + 12, 8);
1330 eui[0] |= 2;
1331 return 0;
1332 }
1333 return -1;
1334}
1335
1336static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1337{
1338 int err = -1;
1339 struct inet6_ifaddr *ifp;
1340
1341 read_lock_bh(&idev->lock);
1342 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1343 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1344 memcpy(eui, ifp->addr.s6_addr+8, 8);
1345 err = 0;
1346 break;
1347 }
1348 }
1349 read_unlock_bh(&idev->lock);
1350 return err;
1351}
1352
1353#ifdef CONFIG_IPV6_PRIVACY
1354/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1355static int __ipv6_regen_rndid(struct inet6_dev *idev)
1356{
1357 struct net_device *dev;
1358 struct scatterlist sg[2];
1359
378f058c
DH		 1360 sg_set_buf(&sg[0], idev->entropy, 8);
1361 sg_set_buf(&sg[1], idev->work_eui64, 8);
1da177e4
LT		 1362
1363 dev = idev->dev;
1364
1365 if (ipv6_generate_eui64(idev->work_eui64, dev)) {
1366 printk(KERN_INFO
1367 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1368 idev);
1369 get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
1370 }
1371regen:
1372 spin_lock(&md5_tfm_lock);
1373 if (unlikely(md5_tfm == NULL)) {
1374 spin_unlock(&md5_tfm_lock);
1375 return -1;
1376 }
1377 crypto_digest_init(md5_tfm);
1378 crypto_digest_update(md5_tfm, sg, 2);
1379 crypto_digest_final(md5_tfm, idev->work_digest);
1380 spin_unlock(&md5_tfm_lock);
1381
1382 memcpy(idev->rndid, &idev->work_digest[0], 8);
1383 idev->rndid[0] &= ~0x02;
1384 memcpy(idev->entropy, &idev->work_digest[8], 8);
1385
1386 /*
1387 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1388 * check if generated address is not inappropriate
1389 *
1390 * - Reserved subnet anycast (RFC 2526)
1391 * 11111101 11....11 1xxxxxxx
1392 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1393 * 00-00-5E-FE-xx-xx-xx-xx
1394 * - value 0
1395 * - XXX: already assigned to an address on the device
1396 */
1397 if (idev->rndid[0] == 0xfd &&
1398 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1399 (idev->rndid[7]&0x80))
1400 goto regen;
1401 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1402 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1403 goto regen;
1404 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1405 goto regen;
1406 }
1407
1408 return 0;
1409}
1410
1411static void ipv6_regen_rndid(unsigned long data)
1412{
1413 struct inet6_dev *idev = (struct inet6_dev *) data;
1414 unsigned long expires;
1415
1416 read_lock_bh(&addrconf_lock);
1417 write_lock_bh(&idev->lock);
1418
1419 if (idev->dead)
1420 goto out;
1421
1422 if (__ipv6_regen_rndid(idev) < 0)
1423 goto out;
1424
1425 expires = jiffies +
1426 idev->cnf.temp_prefered_lft * HZ -
1427 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1428 if (time_before(expires, jiffies)) {
1429 printk(KERN_WARNING
1430 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1431 idev->dev->name);
1432 goto out;
1433 }
1434
1435 if (!mod_timer(&idev->regen_timer, expires))
1436 in6_dev_hold(idev);
1437
1438out:
1439 write_unlock_bh(&idev->lock);
1440 read_unlock_bh(&addrconf_lock);
1441 in6_dev_put(idev);
1442}
1443
1444static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1445 int ret = 0;
1446
1447 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1448 ret = __ipv6_regen_rndid(idev);
1449 return ret;
1450}
1451#endif
1452
1453/*
1454 * Add prefix route.
1455 */
1456
1457static void
1458addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1459 unsigned long expires, u32 flags)
1da177e4
LT		 1460{
1461 struct in6_rtmsg rtmsg;
1462
1463 memset(&rtmsg, 0, sizeof(rtmsg));
1464 ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
1465 rtmsg.rtmsg_dst_len = plen;
1466 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1467 rtmsg.rtmsg_ifindex = dev->ifindex;
1468 rtmsg.rtmsg_info = expires;
1469 rtmsg.rtmsg_flags = RTF_UP|flags;
1470 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1471
1472 /* Prevent useless cloning on PtP SIT.
1473 This thing is done here expecting that the whole
1474 class of non-broadcast devices need not cloning.
1475 */
1476 if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
1477 rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
1478
0d51aa80 1479 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1480}
1481
1482/* Create "default" multicast route to the interface */
1483
1484static void addrconf_add_mroute(struct net_device *dev)
1485{
1486 struct in6_rtmsg rtmsg;
1487
1488 memset(&rtmsg, 0, sizeof(rtmsg));
1489 ipv6_addr_set(&rtmsg.rtmsg_dst,
1490 htonl(0xFF000000), 0, 0, 0);
1491 rtmsg.rtmsg_dst_len = 8;
1492 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1493 rtmsg.rtmsg_ifindex = dev->ifindex;
1494 rtmsg.rtmsg_flags = RTF_UP;
1495 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
0d51aa80 1496 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1497}
1498
1499static void sit_route_add(struct net_device *dev)
1500{
1501 struct in6_rtmsg rtmsg;
1502
1503 memset(&rtmsg, 0, sizeof(rtmsg));
1504
1505 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1506 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1507
1508 /* prefix length - 96 bits "::d.d.d.d" */
1509 rtmsg.rtmsg_dst_len = 96;
1510 rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
1511 rtmsg.rtmsg_ifindex = dev->ifindex;
1512
0d51aa80 1513 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1514}
1515
1516static void addrconf_add_lroute(struct net_device *dev)
1517{
1518 struct in6_addr addr;
1519
1520 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1521 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1522}
1523
1524static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1525{
1526 struct inet6_dev *idev;
1527
1528 ASSERT_RTNL();
1529
1530 if ((idev = ipv6_find_idev(dev)) == NULL)
1531 return NULL;
1532
1533 /* Add default multicast route */
1534 addrconf_add_mroute(dev);
1535
1536 /* Add link local route */
1537 addrconf_add_lroute(dev);
1538 return idev;
1539}
1540
1541void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1542{
1543 struct prefix_info *pinfo;
1544 __u32 valid_lft;
1545 __u32 prefered_lft;
1546 int addr_type;
1547 unsigned long rt_expires;
1548 struct inet6_dev *in6_dev;
1549
1550 pinfo = (struct prefix_info *) opt;
1551
1552 if (len < sizeof(struct prefix_info)) {
1553 ADBG(("addrconf: prefix option too short\n"));
1554 return;
1555 }
1556
1557 /*
1558 * Validation checks ([ADDRCONF], page 19)
1559 */
1560
1561 addr_type = ipv6_addr_type(&pinfo->prefix);
1562
1563 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1564 return;
1565
1566 valid_lft = ntohl(pinfo->valid);
1567 prefered_lft = ntohl(pinfo->prefered);
1568
1569 if (prefered_lft > valid_lft) {
1570 if (net_ratelimit())
1571 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1572 return;
1573 }
1574
1575 in6_dev = in6_dev_get(dev);
1576
1577 if (in6_dev == NULL) {
1578 if (net_ratelimit())
1579 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1580 return;
1581 }
1582
1583 /*
1584 * Two things going on here:
1585 * 1) Add routes for on-link prefixes
1586 * 2) Configure prefixes with the auto flag set
1587 */
1588
1589 /* Avoid arithmetic overflow. Really, we could
1590 save rt_expires in seconds, likely valid_lft,
1591 but it would require division in fib gc, that it
1592 not good.
1593 */
1594 if (valid_lft >= 0x7FFFFFFF/HZ)
1595 rt_expires = 0;
1596 else
1597 rt_expires = jiffies + valid_lft * HZ;
1598
1599 if (pinfo->onlink) {
1600 struct rt6_info *rt;
1601 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1602
1603 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1604 if (rt->rt6i_flags&RTF_EXPIRES) {
1605 if (valid_lft == 0) {
0d51aa80 1606 ip6_del_rt(rt, NULL, NULL, NULL);
1da177e4
LT		 1607 rt = NULL;
1608 } else {
1609 rt->rt6i_expires = rt_expires;
1610 }
1611 }
1612 } else if (valid_lft) {
1613 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1614 dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1615 }
1616 if (rt)
1617 dst_release(&rt->u.dst);
1618 }
1619
1620 /* Try to figure out our local address for this prefix */
1621
1622 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1623 struct inet6_ifaddr * ifp;
1624 struct in6_addr addr;
1625 int create = 0, update_lft = 0;
1626
1627 if (pinfo->prefix_len == 64) {
1628 memcpy(&addr, &pinfo->prefix, 8);
1629 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1630 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1631 in6_dev_put(in6_dev);
1632 return;
1633 }
1634 goto ok;
1635 }
1636 if (net_ratelimit())
1637 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1638 pinfo->prefix_len);
1639 in6_dev_put(in6_dev);
1640 return;
1641
1642ok:
1643
1644 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1645
1646 if (ifp == NULL && valid_lft) {
1647 int max_addresses = in6_dev->cnf.max_addresses;
1648
1649 /* Do not allow to create too much of autoconfigured
1650 * addresses; this would be too easy way to crash kernel.
1651 */
1652 if (!max_addresses ||
1653 ipv6_count_addresses(in6_dev) < max_addresses)
1654 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1655 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1656
1657 if (!ifp || IS_ERR(ifp)) {
1658 in6_dev_put(in6_dev);
1659 return;
1660 }
1661
1662 update_lft = create = 1;
1663 ifp->cstamp = jiffies;
1664 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1665 }
1666
1667 if (ifp) {
1668 int flags;
1669 unsigned long now;
1670#ifdef CONFIG_IPV6_PRIVACY
1671 struct inet6_ifaddr *ift;
1672#endif
1673 u32 stored_lft;
1674
1675 /* update lifetime (RFC2462 5.5.3 e) */
1676 spin_lock(&ifp->lock);
1677 now = jiffies;
1678 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1679 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1680 else
1681 stored_lft = 0;
1682 if (!update_lft && stored_lft) {
1683 if (valid_lft > MIN_VALID_LIFETIME ||
1684 valid_lft > stored_lft)
1685 update_lft = 1;
1686 else if (stored_lft <= MIN_VALID_LIFETIME) {
1687 /* valid_lft <= stored_lft is always true */
1688 /* XXX: IPsec */
1689 update_lft = 0;
1690 } else {
1691 valid_lft = MIN_VALID_LIFETIME;
1692 if (valid_lft < prefered_lft)
1693 prefered_lft = valid_lft;
1694 update_lft = 1;
1695 }
1696 }
1697
1698 if (update_lft) {
1699 ifp->valid_lft = valid_lft;
1700 ifp->prefered_lft = prefered_lft;
1701 ifp->tstamp = now;
1702 flags = ifp->flags;
1703 ifp->flags &= ~IFA_F_DEPRECATED;
1704 spin_unlock(&ifp->lock);
1705
1706 if (!(flags&IFA_F_TENTATIVE))
1707 ipv6_ifa_notify(0, ifp);
1708 } else
1709 spin_unlock(&ifp->lock);
1710
1711#ifdef CONFIG_IPV6_PRIVACY
1712 read_lock_bh(&in6_dev->lock);
1713 /* update all temporary addresses in the list */
1714 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1715 /*
1716 * When adjusting the lifetimes of an existing
1717 * temporary address, only lower the lifetimes.
1718 * Implementations must not increase the
1719 * lifetimes of an existing temporary address
1720 * when processing a Prefix Information Option.
1721 */
1722 spin_lock(&ift->lock);
1723 flags = ift->flags;
1724 if (ift->valid_lft > valid_lft &&
1725 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1726 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1727 if (ift->prefered_lft > prefered_lft &&
1728 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1729 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1730 spin_unlock(&ift->lock);
1731 if (!(flags&IFA_F_TENTATIVE))
1732 ipv6_ifa_notify(0, ift);
1733 }
1734
1735 if (create && in6_dev->cnf.use_tempaddr > 0) {
1736 /*
1737 * When a new public address is created as described in [ADDRCONF],
1738 * also create a new temporary address.
1739 */
1740 read_unlock_bh(&in6_dev->lock);
1741 ipv6_create_tempaddr(ifp, NULL);
1742 } else {
1743 read_unlock_bh(&in6_dev->lock);
1744 }
1745#endif
1746 in6_ifa_put(ifp);
1747 addrconf_verify(0);
1748 }
1749 }
1750 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1751 in6_dev_put(in6_dev);
1752}
1753
1754/*
1755 * Set destination address.
1756 * Special case for SIT interfaces where we create a new "virtual"
1757 * device.
1758 */
1759int addrconf_set_dstaddr(void __user *arg)
1760{
1761 struct in6_ifreq ireq;
1762 struct net_device *dev;
1763 int err = -EINVAL;
1764
1765 rtnl_lock();
1766
1767 err = -EFAULT;
1768 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1769 goto err_exit;
1770
1771 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1772
1773 err = -ENODEV;
1774 if (dev == NULL)
1775 goto err_exit;
1776
1777 if (dev->type == ARPHRD_SIT) {
1778 struct ifreq ifr;
1779 mm_segment_t oldfs;
1780 struct ip_tunnel_parm p;
1781
1782 err = -EADDRNOTAVAIL;
1783 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1784 goto err_exit;
1785
1786 memset(&p, 0, sizeof(p));
1787 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1788 p.iph.saddr = 0;
1789 p.iph.version = 4;
1790 p.iph.ihl = 5;
1791 p.iph.protocol = IPPROTO_IPV6;
1792 p.iph.ttl = 64;
1793 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1794
1795 oldfs = get_fs(); set_fs(KERNEL_DS);
1796 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1797 set_fs(oldfs);
1798
1799 if (err == 0) {
1800 err = -ENOBUFS;
1801 if ((dev = __dev_get_by_name(p.name)) == NULL)
1802 goto err_exit;
1803 err = dev_open(dev);
1804 }
1805 }
1806
1807err_exit:
1808 rtnl_unlock();
1809 return err;
1810}
1811
1812/*
1813 * Manual configuration of address on an interface
1814 */
1815static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
1816{
1817 struct inet6_ifaddr *ifp;
1818 struct inet6_dev *idev;
1819 struct net_device *dev;
1820 int scope;
1821
1822 ASSERT_RTNL();
1823
1824 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1825 return -ENODEV;
1826
1827 if (!(dev->flags&IFF_UP))
1828 return -ENETDOWN;
1829
1830 if ((idev = addrconf_add_dev(dev)) == NULL)
1831 return -ENOBUFS;
1832
1833 scope = ipv6_addr_scope(pfx);
1834
1835 ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
1836 if (!IS_ERR(ifp)) {
1837 addrconf_dad_start(ifp, 0);
1838 in6_ifa_put(ifp);
1839 return 0;
1840 }
1841
1842 return PTR_ERR(ifp);
1843}
1844
1845static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1846{
1847 struct inet6_ifaddr *ifp;
1848 struct inet6_dev *idev;
1849 struct net_device *dev;
1850
1851 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1852 return -ENODEV;
1853
1854 if ((idev = __in6_dev_get(dev)) == NULL)
1855 return -ENXIO;
1856
1857 read_lock_bh(&idev->lock);
1858 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1859 if (ifp->prefix_len == plen &&
1860 ipv6_addr_equal(pfx, &ifp->addr)) {
1861 in6_ifa_hold(ifp);
1862 read_unlock_bh(&idev->lock);
1863
1864 ipv6_del_addr(ifp);
1865
1866 /* If the last address is deleted administratively,
1867 disable IPv6 on this interface.
1868 */
1869 if (idev->addr_list == NULL)
1870 addrconf_ifdown(idev->dev, 1);
1871 return 0;
1872 }
1873 }
1874 read_unlock_bh(&idev->lock);
1875 return -EADDRNOTAVAIL;
1876}
1877
1878
1879int addrconf_add_ifaddr(void __user *arg)
1880{
1881 struct in6_ifreq ireq;
1882 int err;
1883
1884 if (!capable(CAP_NET_ADMIN))
1885 return -EPERM;
1886
1887 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1888 return -EFAULT;
1889
1890 rtnl_lock();
1891 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1892 rtnl_unlock();
1893 return err;
1894}
1895
1896int addrconf_del_ifaddr(void __user *arg)
1897{
1898 struct in6_ifreq ireq;
1899 int err;
1900
1901 if (!capable(CAP_NET_ADMIN))
1902 return -EPERM;
1903
1904 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1905 return -EFAULT;
1906
1907 rtnl_lock();
1908 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1909 rtnl_unlock();
1910 return err;
1911}
1912
1913static void sit_add_v4_addrs(struct inet6_dev *idev)
1914{
1915 struct inet6_ifaddr * ifp;
1916 struct in6_addr addr;
1917 struct net_device *dev;
1918 int scope;
1919
1920 ASSERT_RTNL();
1921
1922 memset(&addr, 0, sizeof(struct in6_addr));
1923 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1924
1925 if (idev->dev->flags&IFF_POINTOPOINT) {
1926 addr.s6_addr32[0] = htonl(0xfe800000);
1927 scope = IFA_LINK;
1928 } else {
1929 scope = IPV6_ADDR_COMPATv4;
1930 }
1931
1932 if (addr.s6_addr32[3]) {
1933 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1934 if (!IS_ERR(ifp)) {
1935 spin_lock_bh(&ifp->lock);
1936 ifp->flags &= ~IFA_F_TENTATIVE;
1937 spin_unlock_bh(&ifp->lock);
1938 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1939 in6_ifa_put(ifp);
1940 }
1941 return;
1942 }
1943
1944 for (dev = dev_base; dev != NULL; dev = dev->next) {
e5ed6399 1945 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 1946 if (in_dev && (dev->flags & IFF_UP)) {
1947 struct in_ifaddr * ifa;
1948
1949 int flag = scope;
1950
1951 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
1952 int plen;
1953
1954 addr.s6_addr32[3] = ifa->ifa_local;
1955
1956 if (ifa->ifa_scope == RT_SCOPE_LINK)
1957 continue;
1958 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
1959 if (idev->dev->flags&IFF_POINTOPOINT)
1960 continue;
1961 flag |= IFA_HOST;
1962 }
1963 if (idev->dev->flags&IFF_POINTOPOINT)
1964 plen = 64;
1965 else
1966 plen = 96;
1967
1968 ifp = ipv6_add_addr(idev, &addr, plen, flag,
1969 IFA_F_PERMANENT);
1970 if (!IS_ERR(ifp)) {
1971 spin_lock_bh(&ifp->lock);
1972 ifp->flags &= ~IFA_F_TENTATIVE;
1973 spin_unlock_bh(&ifp->lock);
1974 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1975 in6_ifa_put(ifp);
1976 }
1977 }
1978 }
1979 }
1980}
1981
1982static void init_loopback(struct net_device *dev)
1983{
1984 struct inet6_dev *idev;
1985 struct inet6_ifaddr * ifp;
1986
1987 /* ::1 */
1988
1989 ASSERT_RTNL();
1990
1991 if ((idev = ipv6_find_idev(dev)) == NULL) {
1992 printk(KERN_DEBUG "init loopback: add_dev failed\n");
1993 return;
1994 }
1995
1996 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
1997 if (!IS_ERR(ifp)) {
1998 spin_lock_bh(&ifp->lock);
1999 ifp->flags &= ~IFA_F_TENTATIVE;
2000 spin_unlock_bh(&ifp->lock);
2001 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2002 in6_ifa_put(ifp);
2003 }
2004}
2005
2006static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2007{
2008 struct inet6_ifaddr * ifp;
2009
2010 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2011 if (!IS_ERR(ifp)) {
2012 addrconf_dad_start(ifp, 0);
2013 in6_ifa_put(ifp);
2014 }
2015}
2016
2017static void addrconf_dev_config(struct net_device *dev)
2018{
2019 struct in6_addr addr;
2020 struct inet6_dev * idev;
2021
2022 ASSERT_RTNL();
2023
2024 if ((dev->type != ARPHRD_ETHER) &&
2025 (dev->type != ARPHRD_FDDI) &&
2026 (dev->type != ARPHRD_IEEE802_TR) &&
2027 (dev->type != ARPHRD_ARCNET) &&
2028 (dev->type != ARPHRD_INFINIBAND)) {
2029 /* Alas, we support only Ethernet autoconfiguration. */
2030 return;
2031 }
2032
2033 idev = addrconf_add_dev(dev);
2034 if (idev == NULL)
2035 return;
2036
2037 memset(&addr, 0, sizeof(struct in6_addr));
2038 addr.s6_addr32[0] = htonl(0xFE800000);
2039
2040 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2041 addrconf_add_linklocal(idev, &addr);
2042}
2043
2044static void addrconf_sit_config(struct net_device *dev)
2045{
2046 struct inet6_dev *idev;
2047
2048 ASSERT_RTNL();
2049
2050 /*
2051 * Configure the tunnel with one of our IPv4
2052 * addresses... we should configure all of
2053 * our v4 addrs in the tunnel
2054 */
2055
2056 if ((idev = ipv6_find_idev(dev)) == NULL) {
2057 printk(KERN_DEBUG "init sit: add_dev failed\n");
2058 return;
2059 }
2060
2061 sit_add_v4_addrs(idev);
2062
2063 if (dev->flags&IFF_POINTOPOINT) {
2064 addrconf_add_mroute(dev);
2065 addrconf_add_lroute(dev);
2066 } else
2067 sit_route_add(dev);
2068}
2069
2070static inline int
2071ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2072{
2073 struct in6_addr lladdr;
2074
2075 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2076 addrconf_add_linklocal(idev, &lladdr);
2077 return 0;
2078 }
2079 return -1;
2080}
2081
2082static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2083{
2084 struct net_device *link_dev;
2085
2086 /* first try to inherit the link-local address from the link device */
2087 if (idev->dev->iflink &&
2088 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2089 if (!ipv6_inherit_linklocal(idev, link_dev))
2090 return;
2091 }
2092 /* then try to inherit it from any device */
2093 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2094 if (!ipv6_inherit_linklocal(idev, link_dev))
2095 return;
2096 }
2097 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2098}
2099
2100/*
2101 * Autoconfigure tunnel with a link-local address so routing protocols,
2102 * DHCPv6, MLD etc. can be run over the virtual link
2103 */
2104
2105static void addrconf_ip6_tnl_config(struct net_device *dev)
2106{
2107 struct inet6_dev *idev;
2108
2109 ASSERT_RTNL();
2110
2111 if ((idev = addrconf_add_dev(dev)) == NULL) {
2112 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2113 return;
2114 }
2115 ip6_tnl_add_linklocal(idev);
2116 addrconf_add_mroute(dev);
2117}
2118
2119static int addrconf_notify(struct notifier_block *this, unsigned long event,
2120 void * data)
2121{
2122 struct net_device *dev = (struct net_device *) data;
2123 struct inet6_dev *idev = __in6_dev_get(dev);
2124
2125 switch(event) {
2126 case NETDEV_UP:
2127 switch(dev->type) {
2128 case ARPHRD_SIT:
2129 addrconf_sit_config(dev);
2130 break;
2131 case ARPHRD_TUNNEL6:
2132 addrconf_ip6_tnl_config(dev);
2133 break;
2134 case ARPHRD_LOOPBACK:
2135 init_loopback(dev);
2136 break;
2137
2138 default:
2139 addrconf_dev_config(dev);
2140 break;
2141 };
2142 if (idev) {
2143 /* If the MTU changed during the interface down, when the
2144 interface up, the changed MTU must be reflected in the
2145 idev as well as routers.
2146 */
2147 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2148 rt6_mtu_change(dev, dev->mtu);
2149 idev->cnf.mtu6 = dev->mtu;
2150 }
2151 idev->tstamp = jiffies;
2152 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2153 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2154 stop IPv6 on this interface.
2155 */
2156 if (dev->mtu < IPV6_MIN_MTU)
2157 addrconf_ifdown(dev, event != NETDEV_DOWN);
2158 }
2159 break;
2160
2161 case NETDEV_CHANGEMTU:
2162 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2163 rt6_mtu_change(dev, dev->mtu);
2164 idev->cnf.mtu6 = dev->mtu;
2165 break;
2166 }
2167
2168 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2169
2170 case NETDEV_DOWN:
2171 case NETDEV_UNREGISTER:
2172 /*
2173 * Remove all addresses from this interface.
2174 */
2175 addrconf_ifdown(dev, event != NETDEV_DOWN);
2176 break;
2177 case NETDEV_CHANGE:
2178 break;
2179 case NETDEV_CHANGENAME:
2180#ifdef CONFIG_SYSCTL
2181 if (idev) {
2182 addrconf_sysctl_unregister(&idev->cnf);
2183 neigh_sysctl_unregister(idev->nd_parms);
2184 neigh_sysctl_register(dev, idev->nd_parms,
2185 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2186 &ndisc_ifinfo_sysctl_change,
2187 NULL);
2188 addrconf_sysctl_register(idev, &idev->cnf);
2189 }
2190#endif
2191 break;
2192 };
2193
2194 return NOTIFY_OK;
2195}
2196
2197/*
2198 * addrconf module should be notified of a device going up
2199 */
2200static struct notifier_block ipv6_dev_notf = {
2201 .notifier_call = addrconf_notify,
2202 .priority = 0
2203};
2204
2205static int addrconf_ifdown(struct net_device *dev, int how)
2206{
2207 struct inet6_dev *idev;
2208 struct inet6_ifaddr *ifa, **bifa;
2209 int i;
2210
2211 ASSERT_RTNL();
2212
2213 if (dev == &loopback_dev && how == 1)
2214 how = 0;
2215
2216 rt6_ifdown(dev);
2217 neigh_ifdown(&nd_tbl, dev);
2218
2219 idev = __in6_dev_get(dev);
2220 if (idev == NULL)
2221 return -ENODEV;
2222
2223 /* Step 1: remove reference to ipv6 device from parent device.
2224 Do not dev_put!
2225 */
2226 if (how == 1) {
2227 write_lock_bh(&addrconf_lock);
2228 dev->ip6_ptr = NULL;
2229 idev->dead = 1;
2230 write_unlock_bh(&addrconf_lock);
2231
2232 /* Step 1.5: remove snmp6 entry */
2233 snmp6_unregister_dev(idev);
2234
2235 }
2236
2237 /* Step 2: clear hash table */
2238 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2239 bifa = &inet6_addr_lst[i];
2240
2241 write_lock_bh(&addrconf_hash_lock);
2242 while ((ifa = *bifa) != NULL) {
2243 if (ifa->idev == idev) {
2244 *bifa = ifa->lst_next;
2245 ifa->lst_next = NULL;
2246 addrconf_del_timer(ifa);
2247 in6_ifa_put(ifa);
2248 continue;
2249 }
2250 bifa = &ifa->lst_next;
2251 }
2252 write_unlock_bh(&addrconf_hash_lock);
2253 }
2254
2255 write_lock_bh(&idev->lock);
2256
2257 /* Step 3: clear flags for stateless addrconf */
2258 if (how != 1)
2259 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
2260
2261 /* Step 4: clear address list */
2262#ifdef CONFIG_IPV6_PRIVACY
2263 if (how == 1 && del_timer(&idev->regen_timer))
2264 in6_dev_put(idev);
2265
2266 /* clear tempaddr list */
2267 while ((ifa = idev->tempaddr_list) != NULL) {
2268 idev->tempaddr_list = ifa->tmp_next;
2269 ifa->tmp_next = NULL;
2270 ifa->dead = 1;
2271 write_unlock_bh(&idev->lock);
2272 spin_lock_bh(&ifa->lock);
2273
2274 if (ifa->ifpub) {
2275 in6_ifa_put(ifa->ifpub);
2276 ifa->ifpub = NULL;
2277 }
2278 spin_unlock_bh(&ifa->lock);
2279 in6_ifa_put(ifa);
2280 write_lock_bh(&idev->lock);
2281 }
2282#endif
2283 while ((ifa = idev->addr_list) != NULL) {
2284 idev->addr_list = ifa->if_next;
2285 ifa->if_next = NULL;
2286 ifa->dead = 1;
2287 addrconf_del_timer(ifa);
2288 write_unlock_bh(&idev->lock);
2289
2290 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2291 in6_ifa_put(ifa);
2292
2293 write_lock_bh(&idev->lock);
2294 }
2295 write_unlock_bh(&idev->lock);
2296
2297 /* Step 5: Discard multicast list */
2298
2299 if (how == 1)
2300 ipv6_mc_destroy_dev(idev);
2301 else
2302 ipv6_mc_down(idev);
2303
2304 /* Step 5: netlink notification of this interface */
2305 idev->tstamp = jiffies;
979ad663 2306 inet6_ifinfo_notify(RTM_DELLINK, idev);
1da177e4
LT		 2307
2308 /* Shot the device (if unregistered) */
2309
2310 if (how == 1) {
2311#ifdef CONFIG_SYSCTL
2312 addrconf_sysctl_unregister(&idev->cnf);
2313 neigh_sysctl_unregister(idev->nd_parms);
2314#endif
2315 neigh_parms_release(&nd_tbl, idev->nd_parms);
2316 neigh_ifdown(&nd_tbl, dev);
2317 in6_dev_put(idev);
2318 }
2319 return 0;
2320}
2321
2322static void addrconf_rs_timer(unsigned long data)
2323{
2324 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2325
2326 if (ifp->idev->cnf.forwarding)
2327 goto out;
2328
2329 if (ifp->idev->if_flags & IF_RA_RCVD) {
2330 /*
2331 * Announcement received after solicitation
2332 * was sent
2333 */
2334 goto out;
2335 }
2336
2337 spin_lock(&ifp->lock);
2338 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2339 struct in6_addr all_routers;
2340
2341 /* The wait after the last probe can be shorter */
2342 addrconf_mod_timer(ifp, AC_RS,
2343 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2344 ifp->idev->cnf.rtr_solicit_delay :
2345 ifp->idev->cnf.rtr_solicit_interval);
2346 spin_unlock(&ifp->lock);
2347
2348 ipv6_addr_all_routers(&all_routers);
2349
2350 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2351 } else {
2352 spin_unlock(&ifp->lock);
2353 /*
2354 * Note: we do not support deprecated "all on-link"
2355 * assumption any longer.
2356 */
2357 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2358 ifp->idev->dev->name);
2359 }
2360
2361out:
2362 in6_ifa_put(ifp);
2363}
2364
2365/*
2366 * Duplicate Address Detection
2367 */
e431b8c0 2368static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2369{
2370 struct inet6_dev *idev = ifp->idev;
2371 struct net_device *dev = idev->dev;
2372 unsigned long rand_num;
2373
2374 addrconf_join_solict(dev, &ifp->addr);
2375
2376 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2377 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2378 flags);
2379
2380 net_srandom(ifp->addr.s6_addr32[3]);
2381 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2382
2383 read_lock_bh(&idev->lock);
2384 if (ifp->dead)
2385 goto out;
2386 spin_lock_bh(&ifp->lock);
2387
2388 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2389 !(ifp->flags&IFA_F_TENTATIVE)) {
2390 ifp->flags &= ~IFA_F_TENTATIVE;
2391 spin_unlock_bh(&ifp->lock);
2392 read_unlock_bh(&idev->lock);
2393
2394 addrconf_dad_completed(ifp);
2395 return;
2396 }
2397
2398 ifp->probes = idev->cnf.dad_transmits;
2399 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2400
2401 spin_unlock_bh(&ifp->lock);
2402out:
2403 read_unlock_bh(&idev->lock);
2404}
2405
2406static void addrconf_dad_timer(unsigned long data)
2407{
2408 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2409 struct inet6_dev *idev = ifp->idev;
2410 struct in6_addr unspec;
2411 struct in6_addr mcaddr;
2412
2413 read_lock_bh(&idev->lock);
2414 if (idev->dead) {
2415 read_unlock_bh(&idev->lock);
2416 goto out;
2417 }
2418 spin_lock_bh(&ifp->lock);
2419 if (ifp->probes == 0) {
2420 /*
2421 * DAD was successful
2422 */
2423
2424 ifp->flags &= ~IFA_F_TENTATIVE;
2425 spin_unlock_bh(&ifp->lock);
2426 read_unlock_bh(&idev->lock);
2427
2428 addrconf_dad_completed(ifp);
2429
2430 goto out;
2431 }
2432
2433 ifp->probes--;
2434 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2435 spin_unlock_bh(&ifp->lock);
2436 read_unlock_bh(&idev->lock);
2437
2438 /* send a neighbour solicitation for our addr */
2439 memset(&unspec, 0, sizeof(unspec));
2440 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2441 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2442out:
2443 in6_ifa_put(ifp);
2444}
2445
2446static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2447{
2448 struct net_device * dev = ifp->idev->dev;
2449
2450 /*
2451 * Configure the address for reception. Now it is valid.
2452 */
2453
2454 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2455
2456 /* If added prefix is link local and forwarding is off,
2457 start sending router solicitations.
2458 */
2459
2460 if (ifp->idev->cnf.forwarding == 0 &&
2461 ifp->idev->cnf.rtr_solicits > 0 &&
2462 (dev->flags&IFF_LOOPBACK) == 0 &&
2463 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2464 struct in6_addr all_routers;
2465
2466 ipv6_addr_all_routers(&all_routers);
2467
2468 /*
2469 * If a host as already performed a random delay
2470 * [...] as part of DAD [...] there is no need
2471 * to delay again before sending the first RS
2472 */
2473 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2474
2475 spin_lock_bh(&ifp->lock);
2476 ifp->probes = 1;
2477 ifp->idev->if_flags |= IF_RS_SENT;
2478 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2479 spin_unlock_bh(&ifp->lock);
2480 }
2481}
2482
2483#ifdef CONFIG_PROC_FS
2484struct if6_iter_state {
2485 int bucket;
2486};
2487
2488static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2489{
2490 struct inet6_ifaddr *ifa = NULL;
2491 struct if6_iter_state *state = seq->private;
2492
2493 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2494 ifa = inet6_addr_lst[state->bucket];
2495 if (ifa)
2496 break;
2497 }
2498 return ifa;
2499}
2500
2501static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2502{
2503 struct if6_iter_state *state = seq->private;
2504
2505 ifa = ifa->lst_next;
2506try_again:
2507 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2508 ifa = inet6_addr_lst[state->bucket];
2509 goto try_again;
2510 }
2511 return ifa;
2512}
2513
2514static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2515{
2516 struct inet6_ifaddr *ifa = if6_get_first(seq);
2517
2518 if (ifa)
2519 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2520 --pos;
2521 return pos ? NULL : ifa;
2522}
2523
2524static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2525{
2526 read_lock_bh(&addrconf_hash_lock);
2527 return if6_get_idx(seq, *pos);
2528}
2529
2530static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2531{
2532 struct inet6_ifaddr *ifa;
2533
2534 ifa = if6_get_next(seq, v);
2535 ++*pos;
2536 return ifa;
2537}
2538
2539static void if6_seq_stop(struct seq_file *seq, void *v)
2540{
2541 read_unlock_bh(&addrconf_hash_lock);
2542}
2543
2544static int if6_seq_show(struct seq_file *seq, void *v)
2545{
2546 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2547 seq_printf(seq,
2548 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2549 NIP6(ifp->addr),
2550 ifp->idev->dev->ifindex,
2551 ifp->prefix_len,
2552 ifp->scope,
2553 ifp->flags,
2554 ifp->idev->dev->name);
2555 return 0;
2556}
2557
2558static struct seq_operations if6_seq_ops = {
2559 .start = if6_seq_start,
2560 .next = if6_seq_next,
2561 .show = if6_seq_show,
2562 .stop = if6_seq_stop,
2563};
2564
2565static int if6_seq_open(struct inode *inode, struct file *file)
2566{
2567 struct seq_file *seq;
2568 int rc = -ENOMEM;
2569 struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2570
2571 if (!s)
2572 goto out;
2573 memset(s, 0, sizeof(*s));
2574
2575 rc = seq_open(file, &if6_seq_ops);
2576 if (rc)
2577 goto out_kfree;
2578
2579 seq = file->private_data;
2580 seq->private = s;
2581out:
2582 return rc;
2583out_kfree:
2584 kfree(s);
2585 goto out;
2586}
2587
2588static struct file_operations if6_fops = {
2589 .owner = THIS_MODULE,
2590 .open = if6_seq_open,
2591 .read = seq_read,
2592 .llseek = seq_lseek,
2593 .release = seq_release_private,
2594};
2595
2596int __init if6_proc_init(void)
2597{
2598 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2599 return -ENOMEM;
2600 return 0;
2601}
2602
2603void if6_proc_exit(void)
2604{
2605 proc_net_remove("if_inet6");
2606}
2607#endif /* CONFIG_PROC_FS */
2608
2609/*
2610 * Periodic address status verification
2611 */
2612
2613static void addrconf_verify(unsigned long foo)
2614{
2615 struct inet6_ifaddr *ifp;
2616 unsigned long now, next;
2617 int i;
2618
2619 spin_lock_bh(&addrconf_verify_lock);
2620 now = jiffies;
2621 next = now + ADDR_CHECK_FREQUENCY;
2622
2623 del_timer(&addr_chk_timer);
2624
2625 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2626
2627restart:
2628 write_lock(&addrconf_hash_lock);
2629 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2630 unsigned long age;
2631#ifdef CONFIG_IPV6_PRIVACY
2632 unsigned long regen_advance;
2633#endif
2634
2635 if (ifp->flags & IFA_F_PERMANENT)
2636 continue;
2637
2638 spin_lock(&ifp->lock);
2639 age = (now - ifp->tstamp) / HZ;
2640
2641#ifdef CONFIG_IPV6_PRIVACY
2642 regen_advance = ifp->idev->cnf.regen_max_retry *
2643 ifp->idev->cnf.dad_transmits *
2644 ifp->idev->nd_parms->retrans_time / HZ;
2645#endif
2646
2647 if (age >= ifp->valid_lft) {
2648 spin_unlock(&ifp->lock);
2649 in6_ifa_hold(ifp);
2650 write_unlock(&addrconf_hash_lock);
2651 ipv6_del_addr(ifp);
2652 goto restart;
2653 } else if (age >= ifp->prefered_lft) {
2654 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2655 int deprecate = 0;
2656
2657 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2658 deprecate = 1;
2659 ifp->flags |= IFA_F_DEPRECATED;
2660 }
2661
2662 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2663 next = ifp->tstamp + ifp->valid_lft * HZ;
2664
2665 spin_unlock(&ifp->lock);
2666
2667 if (deprecate) {
2668 in6_ifa_hold(ifp);
2669 write_unlock(&addrconf_hash_lock);
2670
2671 ipv6_ifa_notify(0, ifp);
2672 in6_ifa_put(ifp);
2673 goto restart;
2674 }
2675#ifdef CONFIG_IPV6_PRIVACY
2676 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2677 !(ifp->flags&IFA_F_TENTATIVE)) {
2678 if (age >= ifp->prefered_lft - regen_advance) {
2679 struct inet6_ifaddr *ifpub = ifp->ifpub;
2680 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2681 next = ifp->tstamp + ifp->prefered_lft * HZ;
2682 if (!ifp->regen_count && ifpub) {
2683 ifp->regen_count++;
2684 in6_ifa_hold(ifp);
2685 in6_ifa_hold(ifpub);
2686 spin_unlock(&ifp->lock);
2687 write_unlock(&addrconf_hash_lock);
2688 ipv6_create_tempaddr(ifpub, ifp);
2689 in6_ifa_put(ifpub);
2690 in6_ifa_put(ifp);
2691 goto restart;
2692 }
2693 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2694 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2695 spin_unlock(&ifp->lock);
2696#endif
2697 } else {
2698 /* ifp->prefered_lft <= ifp->valid_lft */
2699 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2700 next = ifp->tstamp + ifp->prefered_lft * HZ;
2701 spin_unlock(&ifp->lock);
2702 }
2703 }
2704 write_unlock(&addrconf_hash_lock);
2705 }
2706
2707 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2708 add_timer(&addr_chk_timer);
2709 spin_unlock_bh(&addrconf_verify_lock);
2710}
2711
2712static int
2713inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2714{
2715 struct rtattr **rta = arg;
2716 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2717 struct in6_addr *pfx;
2718
2719 pfx = NULL;
2720 if (rta[IFA_ADDRESS-1]) {
2721 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2722 return -EINVAL;
2723 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2724 }
2725 if (rta[IFA_LOCAL-1]) {
2726 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2727 return -EINVAL;
2728 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2729 }
2730 if (pfx == NULL)
2731 return -EINVAL;
2732
2733 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2734}
2735
2736static int
2737inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2738{
2739 struct rtattr **rta = arg;
2740 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2741 struct in6_addr *pfx;
2742
2743 pfx = NULL;
2744 if (rta[IFA_ADDRESS-1]) {
2745 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2746 return -EINVAL;
2747 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2748 }
2749 if (rta[IFA_LOCAL-1]) {
2750 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2751 return -EINVAL;
2752 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2753 }
2754 if (pfx == NULL)
2755 return -EINVAL;
2756
2757 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2758}
2759
2760static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 2761 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2762{
2763 struct ifaddrmsg *ifm;
2764 struct nlmsghdr *nlh;
2765 struct ifa_cacheinfo ci;
2766 unsigned char *b = skb->tail;
2767
b6544c0b 2768 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2769 ifm = NLMSG_DATA(nlh);
2770 ifm->ifa_family = AF_INET6;
2771 ifm->ifa_prefixlen = ifa->prefix_len;
2772 ifm->ifa_flags = ifa->flags;
2773 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2774 if (ifa->scope&IFA_HOST)
2775 ifm->ifa_scope = RT_SCOPE_HOST;
2776 else if (ifa->scope&IFA_LINK)
2777 ifm->ifa_scope = RT_SCOPE_LINK;
2778 else if (ifa->scope&IFA_SITE)
2779 ifm->ifa_scope = RT_SCOPE_SITE;
2780 ifm->ifa_index = ifa->idev->dev->ifindex;
2781 RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
2782 if (!(ifa->flags&IFA_F_PERMANENT)) {
2783 ci.ifa_prefered = ifa->prefered_lft;
2784 ci.ifa_valid = ifa->valid_lft;
2785 if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
2786 long tval = (jiffies - ifa->tstamp)/HZ;
2787 ci.ifa_prefered -= tval;
2788 if (ci.ifa_valid != INFINITY_LIFE_TIME)
2789 ci.ifa_valid -= tval;
2790 }
2791 } else {
2792 ci.ifa_prefered = INFINITY_LIFE_TIME;
2793 ci.ifa_valid = INFINITY_LIFE_TIME;
2794 }
2795 ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
2796 + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2797 ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
2798 + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2799 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2800 nlh->nlmsg_len = skb->tail - b;
2801 return skb->len;
2802
2803nlmsg_failure:
2804rtattr_failure:
2805 skb_trim(skb, b - skb->data);
2806 return -1;
2807}
2808
2809static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 2810 u32 pid, u32 seq, int event, u16 flags)
1da177e4
LT		 2811{
2812 struct ifaddrmsg *ifm;
2813 struct nlmsghdr *nlh;
2814 struct ifa_cacheinfo ci;
2815 unsigned char *b = skb->tail;
2816
b6544c0b 2817 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2818 ifm = NLMSG_DATA(nlh);
2819 ifm->ifa_family = AF_INET6;
2820 ifm->ifa_prefixlen = 128;
2821 ifm->ifa_flags = IFA_F_PERMANENT;
2822 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2823 if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
2824 ifm->ifa_scope = RT_SCOPE_SITE;
2825 ifm->ifa_index = ifmca->idev->dev->ifindex;
2826 RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
2827 ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
2828 * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
2829 * 100 / HZ);
2830 ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
2831 * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
2832 * 100 / HZ);
2833 ci.ifa_prefered = INFINITY_LIFE_TIME;
2834 ci.ifa_valid = INFINITY_LIFE_TIME;
2835 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2836 nlh->nlmsg_len = skb->tail - b;
2837 return skb->len;
2838
2839nlmsg_failure:
2840rtattr_failure:
2841 skb_trim(skb, b - skb->data);
2842 return -1;
2843}
2844
2845static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 2846 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2847{
2848 struct ifaddrmsg *ifm;
2849 struct nlmsghdr *nlh;
2850 struct ifa_cacheinfo ci;
2851 unsigned char *b = skb->tail;
2852
b6544c0b 2853 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2854 ifm = NLMSG_DATA(nlh);
2855 ifm->ifa_family = AF_INET6;
2856 ifm->ifa_prefixlen = 128;
2857 ifm->ifa_flags = IFA_F_PERMANENT;
2858 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2859 if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
2860 ifm->ifa_scope = RT_SCOPE_SITE;
2861 ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
2862 RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
2863 ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
2864 * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
2865 * 100 / HZ);
2866 ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
2867 * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
2868 * 100 / HZ);
2869 ci.ifa_prefered = INFINITY_LIFE_TIME;
2870 ci.ifa_valid = INFINITY_LIFE_TIME;
2871 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2872 nlh->nlmsg_len = skb->tail - b;
2873 return skb->len;
2874
2875nlmsg_failure:
2876rtattr_failure:
2877 skb_trim(skb, b - skb->data);
2878 return -1;
2879}
2880
2881enum addr_type_t
2882{
2883 UNICAST_ADDR,
2884 MULTICAST_ADDR,
2885 ANYCAST_ADDR,
2886};
2887
2888static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
2889 enum addr_type_t type)
2890{
2891 int idx, ip_idx;
2892 int s_idx, s_ip_idx;
2893 int err = 1;
2894 struct net_device *dev;
2895 struct inet6_dev *idev = NULL;
2896 struct inet6_ifaddr *ifa;
2897 struct ifmcaddr6 *ifmca;
2898 struct ifacaddr6 *ifaca;
2899
2900 s_idx = cb->args[0];
2901 s_ip_idx = ip_idx = cb->args[1];
2902 read_lock(&dev_base_lock);
2903
2904 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
2905 if (idx < s_idx)
2906 continue;
2907 if (idx > s_idx)
2908 s_ip_idx = 0;
2909 ip_idx = 0;
2910 if ((idev = in6_dev_get(dev)) == NULL)
2911 continue;
2912 read_lock_bh(&idev->lock);
2913 switch (type) {
2914 case UNICAST_ADDR:
ae9cda5d 2915 /* unicast address incl. temp addr */
1da177e4
LT		 2916 for (ifa = idev->addr_list; ifa;
2917 ifa = ifa->if_next, ip_idx++) {
2918 if (ip_idx < s_ip_idx)
2919 continue;
2920 if ((err = inet6_fill_ifaddr(skb, ifa,
2921 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2922 cb->nlh->nlmsg_seq, RTM_NEWADDR,
2923 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2924 goto done;
2925 }
1da177e4
LT		 2926 break;
2927 case MULTICAST_ADDR:
2928 /* multicast address */
2929 for (ifmca = idev->mc_list; ifmca;
2930 ifmca = ifmca->next, ip_idx++) {
2931 if (ip_idx < s_ip_idx)
2932 continue;
2933 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
2934 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2935 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
2936 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2937 goto done;
2938 }
2939 break;
2940 case ANYCAST_ADDR:
2941 /* anycast address */
2942 for (ifaca = idev->ac_list; ifaca;
2943 ifaca = ifaca->aca_next, ip_idx++) {
2944 if (ip_idx < s_ip_idx)
2945 continue;
2946 if ((err = inet6_fill_ifacaddr(skb, ifaca,
2947 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2948 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
2949 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2950 goto done;
2951 }
2952 break;
2953 default:
2954 break;
2955 }
2956 read_unlock_bh(&idev->lock);
2957 in6_dev_put(idev);
2958 }
2959done:
2960 if (err <= 0) {
2961 read_unlock_bh(&idev->lock);
2962 in6_dev_put(idev);
2963 }
2964 read_unlock(&dev_base_lock);
2965 cb->args[0] = idx;
2966 cb->args[1] = ip_idx;
2967 return skb->len;
2968}
2969
2970static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
2971{
2972 enum addr_type_t type = UNICAST_ADDR;
2973 return inet6_dump_addr(skb, cb, type);
2974}
2975
2976static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
2977{
2978 enum addr_type_t type = MULTICAST_ADDR;
2979 return inet6_dump_addr(skb, cb, type);
2980}
2981
2982
2983static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
2984{
2985 enum addr_type_t type = ANYCAST_ADDR;
2986 return inet6_dump_addr(skb, cb, type);
2987}
2988
2989static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
2990{
2991 struct sk_buff *skb;
2992 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
2993
2994 skb = alloc_skb(size, GFP_ATOMIC);
2995 if (!skb) {
ac6d439d 2996 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
1da177e4
LT		 2997 return;
2998 }
9ed19f33 2999 if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
1da177e4 3000 kfree_skb(skb);
ac6d439d 3001 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
1da177e4
LT		 3002 return;
3003 }
ac6d439d
PM		 3004 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
3005 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
1da177e4
LT		 3006}
3007
3008static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3009 __s32 *array, int bytes)
3010{
3011 memset(array, 0, bytes);
3012 array[DEVCONF_FORWARDING] = cnf->forwarding;
3013 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3014 array[DEVCONF_MTU6] = cnf->mtu6;
3015 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3016 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3017 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3018 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3019 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3020 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3021 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3022 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3023#ifdef CONFIG_IPV6_PRIVACY
3024 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3025 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3026 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3027 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3028 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3029#endif
3030 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3031}
3032
3033static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3034 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 3035{
3036 struct net_device *dev = idev->dev;
3037 __s32 *array = NULL;
3038 struct ifinfomsg *r;
3039 struct nlmsghdr *nlh;
3040 unsigned char *b = skb->tail;
3041 struct rtattr *subattr;
3042 __u32 mtu = dev->mtu;
3043 struct ifla_cacheinfo ci;
3044
b6544c0b 3045 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
1da177e4
LT		 3046 r = NLMSG_DATA(nlh);
3047 r->ifi_family = AF_INET6;
9ef1d4c7 3048 r->__ifi_pad = 0;
1da177e4
LT		 3049 r->ifi_type = dev->type;
3050 r->ifi_index = dev->ifindex;
3051 r->ifi_flags = dev_get_flags(dev);
3052 r->ifi_change = 0;
3053
3054 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
3055
3056 if (dev->addr_len)
3057 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3058
3059 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
3060 if (dev->ifindex != dev->iflink)
3061 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
3062
3063 subattr = (struct rtattr*)skb->tail;
3064
3065 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
3066
3067 /* return the device flags */
3068 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
3069
3070 /* return interface cacheinfo */
3071 ci.max_reasm_len = IPV6_MAXPLEN;
3072 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3073 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3074 ci.reachable_time = idev->nd_parms->reachable_time;
3075 ci.retrans_time = idev->nd_parms->retrans_time;
3076 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3077
3078 /* return the device sysctl params */
3079 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
3080 goto rtattr_failure;
3081 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
3082 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
3083
3084 /* XXX - Statistics/MC not implemented */
3085 subattr->rta_len = skb->tail - (u8*)subattr;
3086
3087 nlh->nlmsg_len = skb->tail - b;
3088 kfree(array);
3089 return skb->len;
3090
3091nlmsg_failure:
3092rtattr_failure:
3093 if (array)
3094 kfree(array);
3095 skb_trim(skb, b - skb->data);
3096 return -1;
3097}
3098
3099static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3100{
3101 int idx, err;
3102 int s_idx = cb->args[0];
3103 struct net_device *dev;
3104 struct inet6_dev *idev;
3105
3106 read_lock(&dev_base_lock);
3107 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3108 if (idx < s_idx)
3109 continue;
3110 if ((idev = in6_dev_get(dev)) == NULL)
3111 continue;
3112 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3113 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3114 in6_dev_put(idev);
3115 if (err <= 0)
3116 break;
3117 }
3118 read_unlock(&dev_base_lock);
3119 cb->args[0] = idx;
3120
3121 return skb->len;
3122}
3123
3124void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3125{
3126 struct sk_buff *skb;
3127 /* 128 bytes ?? */
3128 int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
3129
3130 skb = alloc_skb(size, GFP_ATOMIC);
3131 if (!skb) {
ac6d439d 3132 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
1da177e4
LT		 3133 return;
3134 }
9ed19f33 3135 if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
1da177e4 3136 kfree_skb(skb);
ac6d439d 3137 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
1da177e4
LT		 3138 return;
3139 }
ac6d439d
PM		 3140 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
3141 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
1da177e4
LT		 3142}
3143
3144static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b
JHS		 3145 struct prefix_info *pinfo, u32 pid, u32 seq,
3146 int event, unsigned int flags)
1da177e4
LT		 3147{
3148 struct prefixmsg *pmsg;
3149 struct nlmsghdr *nlh;
3150 unsigned char *b = skb->tail;
3151 struct prefix_cacheinfo ci;
3152
b6544c0b 3153 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
1da177e4
LT		 3154 pmsg = NLMSG_DATA(nlh);
3155 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3156 pmsg->prefix_pad1 = 0;
3157 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3158 pmsg->prefix_ifindex = idev->dev->ifindex;
3159 pmsg->prefix_len = pinfo->prefix_len;
3160 pmsg->prefix_type = pinfo->type;
8a47077a 3161 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3162
3163 pmsg->prefix_flags = 0;
3164 if (pinfo->onlink)
3165 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3166 if (pinfo->autoconf)
3167 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3168
3169 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3170
3171 ci.preferred_time = ntohl(pinfo->prefered);
3172 ci.valid_time = ntohl(pinfo->valid);
3173 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3174
3175 nlh->nlmsg_len = skb->tail - b;
3176 return skb->len;
3177
3178nlmsg_failure:
3179rtattr_failure:
3180 skb_trim(skb, b - skb->data);
3181 return -1;
3182}
3183
3184static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3185 struct prefix_info *pinfo)
3186{
3187 struct sk_buff *skb;
3188 int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
3189
3190 skb = alloc_skb(size, GFP_ATOMIC);
3191 if (!skb) {
ac6d439d 3192 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
1da177e4
LT		 3193 return;
3194 }
9ed19f33 3195 if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
1da177e4 3196 kfree_skb(skb);
ac6d439d 3197 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
1da177e4
LT		 3198 return;
3199 }
ac6d439d
PM		 3200 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
3201 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
1da177e4
LT		 3202}
3203
db46edc6 3204static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
1da177e4
LT		 3205 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3206 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3207 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3208 [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
3209 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3210 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3211 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3212 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3213 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3214 .dumpit = inet6_dump_fib, },
3215};
3216
3217static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3218{
3219 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3220
3221 switch (event) {
3222 case RTM_NEWADDR:
3223 dst_hold(&ifp->rt->u.dst);
0d51aa80 3224 if (ip6_ins_rt(ifp->rt, NULL, NULL, NULL))
1da177e4
LT		 3225 dst_release(&ifp->rt->u.dst);
3226 if (ifp->idev->cnf.forwarding)
3227 addrconf_join_anycast(ifp);
3228 break;
3229 case RTM_DELADDR:
3230 if (ifp->idev->cnf.forwarding)
3231 addrconf_leave_anycast(ifp);
3232 addrconf_leave_solict(ifp->idev, &ifp->addr);
3233 dst_hold(&ifp->rt->u.dst);
0d51aa80 3234 if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
1da177e4
LT		 3235 dst_free(&ifp->rt->u.dst);
3236 else
3237 dst_release(&ifp->rt->u.dst);
3238 break;
3239 }
3240}
3241
3242static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3243{
3244 read_lock_bh(&addrconf_lock);
3245 if (likely(ifp->idev->dead == 0))
3246 __ipv6_ifa_notify(event, ifp);
3247 read_unlock_bh(&addrconf_lock);
3248}
3249
3250#ifdef CONFIG_SYSCTL
3251
3252static
3253int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3254 void __user *buffer, size_t *lenp, loff_t *ppos)
3255{
3256 int *valp = ctl->data;
3257 int val = *valp;
3258 int ret;
3259
3260 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3261
3262 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3263 if (valp != &ipv6_devconf.forwarding) {
3264 if ((!*valp) ^ (!val)) {
3265 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3266 if (idev == NULL)
3267 return ret;
3268 dev_forward_change(idev);
3269 }
3270 } else {
3271 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3272 addrconf_forward_change();
3273 }
3274 if (*valp)
3275 rt6_purge_dflt_routers();
3276 }
3277
3278 return ret;
3279}
3280
3281static int addrconf_sysctl_forward_strategy(ctl_table *table,
3282 int __user *name, int nlen,
3283 void __user *oldval,
3284 size_t __user *oldlenp,
3285 void __user *newval, size_t newlen,
3286 void **context)
3287{
3288 int *valp = table->data;
3289 int new;
3290
3291 if (!newval || !newlen)
3292 return 0;
3293 if (newlen != sizeof(int))
3294 return -EINVAL;
3295 if (get_user(new, (int __user *)newval))
3296 return -EFAULT;
3297 if (new == *valp)
3298 return 0;
3299 if (oldval && oldlenp) {
3300 size_t len;
3301 if (get_user(len, oldlenp))
3302 return -EFAULT;
3303 if (len) {
3304 if (len > table->maxlen)
3305 len = table->maxlen;
3306 if (copy_to_user(oldval, valp, len))
3307 return -EFAULT;
3308 if (put_user(len, oldlenp))
3309 return -EFAULT;
3310 }
3311 }
3312
3313 if (valp != &ipv6_devconf_dflt.forwarding) {
3314 if (valp != &ipv6_devconf.forwarding) {
3315 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3316 int changed;
3317 if (unlikely(idev == NULL))
3318 return -ENODEV;
3319 changed = (!*valp) ^ (!new);
3320 *valp = new;
3321 if (changed)
3322 dev_forward_change(idev);
3323 } else {
3324 *valp = new;
3325 addrconf_forward_change();
3326 }
3327
3328 if (*valp)
3329 rt6_purge_dflt_routers();
3330 } else
3331 *valp = new;
3332
3333 return 1;
3334}
3335
3336static struct addrconf_sysctl_table
3337{
3338 struct ctl_table_header *sysctl_header;
3339 ctl_table addrconf_vars[__NET_IPV6_MAX];
3340 ctl_table addrconf_dev[2];
3341 ctl_table addrconf_conf_dir[2];
3342 ctl_table addrconf_proto_dir[2];
3343 ctl_table addrconf_root_dir[2];
3344} addrconf_sysctl = {
3345 .sysctl_header = NULL,
3346 .addrconf_vars = {
3347 {
3348 .ctl_name = NET_IPV6_FORWARDING,
3349 .procname = "forwarding",
3350 .data = &ipv6_devconf.forwarding,
3351 .maxlen = sizeof(int),
3352 .mode = 0644,
3353 .proc_handler = &addrconf_sysctl_forward,
3354 .strategy = &addrconf_sysctl_forward_strategy,
3355 },
3356 {
3357 .ctl_name = NET_IPV6_HOP_LIMIT,
3358 .procname = "hop_limit",
3359 .data = &ipv6_devconf.hop_limit,
3360 .maxlen = sizeof(int),
3361 .mode = 0644,
3362 .proc_handler = proc_dointvec,
3363 },
3364 {
3365 .ctl_name = NET_IPV6_MTU,
3366 .procname = "mtu",
3367 .data = &ipv6_devconf.mtu6,
3368 .maxlen = sizeof(int),
3369 .mode = 0644,
3370 .proc_handler = &proc_dointvec,
3371 },
3372 {
3373 .ctl_name = NET_IPV6_ACCEPT_RA,
3374 .procname = "accept_ra",
3375 .data = &ipv6_devconf.accept_ra,
3376 .maxlen = sizeof(int),
3377 .mode = 0644,
3378 .proc_handler = &proc_dointvec,
3379 },
3380 {
3381 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3382 .procname = "accept_redirects",
3383 .data = &ipv6_devconf.accept_redirects,
3384 .maxlen = sizeof(int),
3385 .mode = 0644,
3386 .proc_handler = &proc_dointvec,
3387 },
3388 {
3389 .ctl_name = NET_IPV6_AUTOCONF,
3390 .procname = "autoconf",
3391 .data = &ipv6_devconf.autoconf,
3392 .maxlen = sizeof(int),
3393 .mode = 0644,
3394 .proc_handler = &proc_dointvec,
3395 },
3396 {
3397 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3398 .procname = "dad_transmits",
3399 .data = &ipv6_devconf.dad_transmits,
3400 .maxlen = sizeof(int),
3401 .mode = 0644,
3402 .proc_handler = &proc_dointvec,
3403 },
3404 {
3405 .ctl_name = NET_IPV6_RTR_SOLICITS,
3406 .procname = "router_solicitations",
3407 .data = &ipv6_devconf.rtr_solicits,
3408 .maxlen = sizeof(int),
3409 .mode = 0644,
3410 .proc_handler = &proc_dointvec,
3411 },
3412 {
3413 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3414 .procname = "router_solicitation_interval",
3415 .data = &ipv6_devconf.rtr_solicit_interval,
3416 .maxlen = sizeof(int),
3417 .mode = 0644,
3418 .proc_handler = &proc_dointvec_jiffies,
3419 .strategy = &sysctl_jiffies,
3420 },
3421 {
3422 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3423 .procname = "router_solicitation_delay",
3424 .data = &ipv6_devconf.rtr_solicit_delay,
3425 .maxlen = sizeof(int),
3426 .mode = 0644,
3427 .proc_handler = &proc_dointvec_jiffies,
3428 .strategy = &sysctl_jiffies,
3429 },
3430 {
3431 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3432 .procname = "force_mld_version",
3433 .data = &ipv6_devconf.force_mld_version,
3434 .maxlen = sizeof(int),
3435 .mode = 0644,
3436 .proc_handler = &proc_dointvec,
3437 },
3438#ifdef CONFIG_IPV6_PRIVACY
3439 {
3440 .ctl_name = NET_IPV6_USE_TEMPADDR,
3441 .procname = "use_tempaddr",
3442 .data = &ipv6_devconf.use_tempaddr,
3443 .maxlen = sizeof(int),
3444 .mode = 0644,
3445 .proc_handler = &proc_dointvec,
3446 },
3447 {
3448 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3449 .procname = "temp_valid_lft",
3450 .data = &ipv6_devconf.temp_valid_lft,
3451 .maxlen = sizeof(int),
3452 .mode = 0644,
3453 .proc_handler = &proc_dointvec,
3454 },
3455 {
3456 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3457 .procname = "temp_prefered_lft",
3458 .data = &ipv6_devconf.temp_prefered_lft,
3459 .maxlen = sizeof(int),
3460 .mode = 0644,
3461 .proc_handler = &proc_dointvec,
3462 },
3463 {
3464 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3465 .procname = "regen_max_retry",
3466 .data = &ipv6_devconf.regen_max_retry,
3467 .maxlen = sizeof(int),
3468 .mode = 0644,
3469 .proc_handler = &proc_dointvec,
3470 },
3471 {
3472 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3473 .procname = "max_desync_factor",
3474 .data = &ipv6_devconf.max_desync_factor,
3475 .maxlen = sizeof(int),
3476 .mode = 0644,
3477 .proc_handler = &proc_dointvec,
3478 },
3479#endif
3480 {
3481 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3482 .procname = "max_addresses",
3483 .data = &ipv6_devconf.max_addresses,
3484 .maxlen = sizeof(int),
3485 .mode = 0644,
3486 .proc_handler = &proc_dointvec,
3487 },
3488 {
3489 .ctl_name = 0, /* sentinel */
3490 }
3491 },
3492 .addrconf_dev = {
3493 {
3494 .ctl_name = NET_PROTO_CONF_ALL,
3495 .procname = "all",
3496 .mode = 0555,
3497 .child = addrconf_sysctl.addrconf_vars,
3498 },
3499 {
3500 .ctl_name = 0, /* sentinel */
3501 }
3502 },
3503 .addrconf_conf_dir = {
3504 {
3505 .ctl_name = NET_IPV6_CONF,
3506 .procname = "conf",
3507 .mode = 0555,
3508 .child = addrconf_sysctl.addrconf_dev,
3509 },
3510 {
3511 .ctl_name = 0, /* sentinel */
3512 }
3513 },
3514 .addrconf_proto_dir = {
3515 {
3516 .ctl_name = NET_IPV6,
3517 .procname = "ipv6",
3518 .mode = 0555,
3519 .child = addrconf_sysctl.addrconf_conf_dir,
3520 },
3521 {
3522 .ctl_name = 0, /* sentinel */
3523 }
3524 },
3525 .addrconf_root_dir = {
3526 {
3527 .ctl_name = CTL_NET,
3528 .procname = "net",
3529 .mode = 0555,
3530 .child = addrconf_sysctl.addrconf_proto_dir,
3531 },
3532 {
3533 .ctl_name = 0, /* sentinel */
3534 }
3535 },
3536};
3537
3538static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3539{
3540 int i;
3541 struct net_device *dev = idev ? idev->dev : NULL;
3542 struct addrconf_sysctl_table *t;
3543 char *dev_name = NULL;
3544
3545 t = kmalloc(sizeof(*t), GFP_KERNEL);
3546 if (t == NULL)
3547 return;
3548 memcpy(t, &addrconf_sysctl, sizeof(*t));
3549 for (i=0; t->addrconf_vars[i].data; i++) {
3550 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3551 t->addrconf_vars[i].de = NULL;
3552 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3553 }
3554 if (dev) {
3555 dev_name = dev->name;
3556 t->addrconf_dev[0].ctl_name = dev->ifindex;
3557 } else {
3558 dev_name = "default";
3559 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3560 }
3561
3562 /*
3563 * Make a copy of dev_name, because '.procname' is regarded as const
3564 * by sysctl and we wouldn't want anyone to change it under our feet
3565 * (see SIOCSIFNAME).
3566 */
543537bd 3567 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 3568 if (!dev_name)
3569 goto free;
3570
3571 t->addrconf_dev[0].procname = dev_name;
3572
3573 t->addrconf_dev[0].child = t->addrconf_vars;
3574 t->addrconf_dev[0].de = NULL;
3575 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3576 t->addrconf_conf_dir[0].de = NULL;
3577 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3578 t->addrconf_proto_dir[0].de = NULL;
3579 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3580 t->addrconf_root_dir[0].de = NULL;
3581
3582 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3583 if (t->sysctl_header == NULL)
3584 goto free_procname;
3585 else
3586 p->sysctl = t;
3587 return;
3588
3589 /* error path */
3590 free_procname:
3591 kfree(dev_name);
3592 free:
3593 kfree(t);
3594
3595 return;
3596}
3597
3598static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3599{
3600 if (p->sysctl) {
3601 struct addrconf_sysctl_table *t = p->sysctl;
3602 p->sysctl = NULL;
3603 unregister_sysctl_table(t->sysctl_header);
3604 kfree(t->addrconf_dev[0].procname);
3605 kfree(t);
3606 }
3607}
3608
3609
3610#endif
3611
3612/*
3613 * Device notifier
3614 */
3615
3616int register_inet6addr_notifier(struct notifier_block *nb)
3617{
3618 return notifier_chain_register(&inet6addr_chain, nb);
3619}
3620
3621int unregister_inet6addr_notifier(struct notifier_block *nb)
3622{
3623 return notifier_chain_unregister(&inet6addr_chain,nb);
3624}
3625
3626/*
3627 * Init / cleanup code
3628 */
3629
3630int __init addrconf_init(void)
3631{
3632 int err = 0;
3633
3634 /* The addrconf netdev notifier requires that loopback_dev
3635 * has it's ipv6 private information allocated and setup
3636 * before it can bring up and give link-local addresses
3637 * to other devices which are up.
3638 *
3639 * Unfortunately, loopback_dev is not necessarily the first
3640 * entry in the global dev_base list of net devices. In fact,
3641 * it is likely to be the very last entry on that list.
3642 * So this causes the notifier registry below to try and
3643 * give link-local addresses to all devices besides loopback_dev
3644 * first, then loopback_dev, which cases all the non-loopback_dev
3645 * devices to fail to get a link-local address.
3646 *
3647 * So, as a temporary fix, allocate the ipv6 structure for
3648 * loopback_dev first by hand.
3649 * Longer term, all of the dependencies ipv6 has upon the loopback
3650 * device and it being up should be removed.
3651 */
3652 rtnl_lock();
3653 if (!ipv6_add_dev(&loopback_dev))
3654 err = -ENOMEM;
3655 rtnl_unlock();
3656 if (err)
3657 return err;
3658
c62dba90
HX		 3659 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
3660
1da177e4
LT		 3661 register_netdevice_notifier(&ipv6_dev_notf);
3662
3663#ifdef CONFIG_IPV6_PRIVACY
3664 md5_tfm = crypto_alloc_tfm("md5", 0);
3665 if (unlikely(md5_tfm == NULL))
3666 printk(KERN_WARNING
3667 "failed to load transform for md5\n");
3668#endif
3669
3670 addrconf_verify(0);
3671 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3672#ifdef CONFIG_SYSCTL
3673 addrconf_sysctl.sysctl_header =
3674 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
3675 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
3676#endif
3677
3678 return 0;
3679}
3680
3681void __exit addrconf_cleanup(void)
3682{
3683 struct net_device *dev;
3684 struct inet6_dev *idev;
3685 struct inet6_ifaddr *ifa;
3686 int i;
3687
3688 unregister_netdevice_notifier(&ipv6_dev_notf);
3689
3690 rtnetlink_links[PF_INET6] = NULL;
3691#ifdef CONFIG_SYSCTL
3692 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
3693 addrconf_sysctl_unregister(&ipv6_devconf);
3694#endif
3695
3696 rtnl_lock();
3697
3698 /*
3699 * clean dev list.
3700 */
3701
3702 for (dev=dev_base; dev; dev=dev->next) {
3703 if ((idev = __in6_dev_get(dev)) == NULL)
3704 continue;
3705 addrconf_ifdown(dev, 1);
3706 }
3707 addrconf_ifdown(&loopback_dev, 2);
3708
3709 /*
3710 * Check hash table.
3711 */
3712
3713 write_lock_bh(&addrconf_hash_lock);
3714 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3715 for (ifa=inet6_addr_lst[i]; ifa; ) {
3716 struct inet6_ifaddr *bifa;
3717
3718 bifa = ifa;
3719 ifa = ifa->lst_next;
3720 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
3721 /* Do not free it; something is wrong.
3722 Now we can investigate it with debugger.
3723 */
3724 }
3725 }
3726 write_unlock_bh(&addrconf_hash_lock);
3727
3728 del_timer(&addr_chk_timer);
3729
3730 rtnl_unlock();
3731
3732#ifdef CONFIG_IPV6_PRIVACY
573dbd95
JJ		 3733 crypto_free_tfm(md5_tfm);
3734 md5_tfm = NULL;
1da177e4
LT		 3735#endif
3736
3737#ifdef CONFIG_PROC_FS
3738 proc_net_remove("if_inet6");
3739#endif
3740}
kernel source for telekom puls (alcatel/mediatek)