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[COMPAT] net: SIOCGIFCONF data corruption
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
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
44fd0261 1025#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1026 /* Rule 7: Prefer public address
1027 * Note: prefer temprary address if use_tempaddr >= 2
1028 */
1029 if (hiscore.rule < 7) {
1030 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1031 (ifa_result->idev->cnf.use_tempaddr >= 2))
1032 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1033 hiscore.rule++;
1034 }
1035 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1036 (ifa->idev->cnf.use_tempaddr >= 2)) {
1037 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1038 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1039 score.rule = 7;
1040 goto record_it;
1041 }
1042 } else {
1043 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1044 continue;
1045 }
44fd0261 1046#endif
072047e4 1047 /* Rule 8: Use longest matching prefix */
12da2a43 1048 if (hiscore.rule < 8) {
072047e4 1049 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1050 hiscore.rule++;
1051 }
072047e4
YH		 1052 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1053 if (score.matchlen > hiscore.matchlen) {
1054 score.rule = 8;
1055 goto record_it;
1da177e4 1056 }
072047e4
YH		 1057#if 0
1058 else if (score.matchlen < hiscore.matchlen)
1059 continue;
1060#endif
1061
1062 /* Final Rule: choose first available one */
1063 continue;
1064record_it:
1065 if (ifa_result)
1066 in6_ifa_put(ifa_result);
1067 in6_ifa_hold(ifa);
1068 ifa_result = ifa;
1069 hiscore = score;
1da177e4 1070 }
072047e4 1071 read_unlock_bh(&idev->lock);
1da177e4 1072 }
1da177e4
LT		 1073 read_unlock(&addrconf_lock);
1074 read_unlock(&dev_base_lock);
1075
072047e4
YH		 1076 if (!ifa_result)
1077 return -EADDRNOTAVAIL;
1078
1079 ipv6_addr_copy(saddr, &ifa_result->addr);
1080 in6_ifa_put(ifa_result);
1081 return 0;
1da177e4
LT		 1082}
1083
1084
1085int ipv6_get_saddr(struct dst_entry *dst,
1086 struct in6_addr *daddr, struct in6_addr *saddr)
1087{
1088 return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
1089}
1090
1091
1092int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1093{
1094 struct inet6_dev *idev;
1095 int err = -EADDRNOTAVAIL;
1096
1097 read_lock(&addrconf_lock);
1098 if ((idev = __in6_dev_get(dev)) != NULL) {
1099 struct inet6_ifaddr *ifp;
1100
1101 read_lock_bh(&idev->lock);
1102 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1103 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1104 ipv6_addr_copy(addr, &ifp->addr);
1105 err = 0;
1106 break;
1107 }
1108 }
1109 read_unlock_bh(&idev->lock);
1110 }
1111 read_unlock(&addrconf_lock);
1112 return err;
1113}
1114
1115static int ipv6_count_addresses(struct inet6_dev *idev)
1116{
1117 int cnt = 0;
1118 struct inet6_ifaddr *ifp;
1119
1120 read_lock_bh(&idev->lock);
1121 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1122 cnt++;
1123 read_unlock_bh(&idev->lock);
1124 return cnt;
1125}
1126
1127int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1128{
1129 struct inet6_ifaddr * ifp;
1130 u8 hash = ipv6_addr_hash(addr);
1131
1132 read_lock_bh(&addrconf_hash_lock);
1133 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1134 if (ipv6_addr_equal(&ifp->addr, addr) &&
1135 !(ifp->flags&IFA_F_TENTATIVE)) {
1136 if (dev == NULL || ifp->idev->dev == dev ||
1137 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1138 break;
1139 }
1140 }
1141 read_unlock_bh(&addrconf_hash_lock);
1142 return ifp != NULL;
1143}
1144
1145static
1146int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1147{
1148 struct inet6_ifaddr * ifp;
1149 u8 hash = ipv6_addr_hash(addr);
1150
1151 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1152 if (ipv6_addr_equal(&ifp->addr, addr)) {
1153 if (dev == NULL || ifp->idev->dev == dev)
1154 break;
1155 }
1156 }
1157 return ifp != NULL;
1158}
1159
1160struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1161{
1162 struct inet6_ifaddr * ifp;
1163 u8 hash = ipv6_addr_hash(addr);
1164
1165 read_lock_bh(&addrconf_hash_lock);
1166 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1167 if (ipv6_addr_equal(&ifp->addr, addr)) {
1168 if (dev == NULL || ifp->idev->dev == dev ||
1169 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1170 in6_ifa_hold(ifp);
1171 break;
1172 }
1173 }
1174 }
1175 read_unlock_bh(&addrconf_hash_lock);
1176
1177 return ifp;
1178}
1179
1180int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1181{
1182 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
1183 const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
1184 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
8feaf0c0 1185 u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1186 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1187 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1188 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1189 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1190
1191 if (!sk2_rcv_saddr && !sk_ipv6only)
1192 return 1;
1193
1194 if (addr_type2 == IPV6_ADDR_ANY &&
1195 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1196 return 1;
1197
1198 if (addr_type == IPV6_ADDR_ANY &&
1199 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1200 return 1;
1201
1202 if (sk2_rcv_saddr6 &&
1203 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1204 return 1;
1205
1206 if (addr_type == IPV6_ADDR_MAPPED &&
1207 !sk2_ipv6only &&
1208 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1209 return 1;
1210
1211 return 0;
1212}
1213
1214/* Gets referenced address, destroys ifaddr */
1215
1216void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1217{
1218 if (net_ratelimit())
1219 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1220 if (ifp->flags&IFA_F_PERMANENT) {
1221 spin_lock_bh(&ifp->lock);
1222 addrconf_del_timer(ifp);
1223 ifp->flags |= IFA_F_TENTATIVE;
1224 spin_unlock_bh(&ifp->lock);
1225 in6_ifa_put(ifp);
1226#ifdef CONFIG_IPV6_PRIVACY
1227 } else if (ifp->flags&IFA_F_TEMPORARY) {
1228 struct inet6_ifaddr *ifpub;
1229 spin_lock_bh(&ifp->lock);
1230 ifpub = ifp->ifpub;
1231 if (ifpub) {
1232 in6_ifa_hold(ifpub);
1233 spin_unlock_bh(&ifp->lock);
1234 ipv6_create_tempaddr(ifpub, ifp);
1235 in6_ifa_put(ifpub);
1236 } else {
1237 spin_unlock_bh(&ifp->lock);
1238 }
1239 ipv6_del_addr(ifp);
1240#endif
1241 } else
1242 ipv6_del_addr(ifp);
1243}
1244
1245
1246/* Join to solicited addr multicast group. */
1247
1248void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1249{
1250 struct in6_addr maddr;
1251
1252 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1253 return;
1254
1255 addrconf_addr_solict_mult(addr, &maddr);
1256 ipv6_dev_mc_inc(dev, &maddr);
1257}
1258
1259void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1260{
1261 struct in6_addr maddr;
1262
1263 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1264 return;
1265
1266 addrconf_addr_solict_mult(addr, &maddr);
1267 __ipv6_dev_mc_dec(idev, &maddr);
1268}
1269
20380731 1270static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1271{
1272 struct in6_addr addr;
1273 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1274 if (ipv6_addr_any(&addr))
1275 return;
1276 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1277}
1278
20380731 1279static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1280{
1281 struct in6_addr addr;
1282 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1283 if (ipv6_addr_any(&addr))
1284 return;
1285 __ipv6_dev_ac_dec(ifp->idev, &addr);
1286}
1287
1288static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1289{
1290 switch (dev->type) {
1291 case ARPHRD_ETHER:
1292 case ARPHRD_FDDI:
1293 case ARPHRD_IEEE802_TR:
1294 if (dev->addr_len != ETH_ALEN)
1295 return -1;
1296 memcpy(eui, dev->dev_addr, 3);
1297 memcpy(eui + 5, dev->dev_addr + 3, 3);
1298
1299 /*
1300 * The zSeries OSA network cards can be shared among various
1301 * OS instances, but the OSA cards have only one MAC address.
1302 * This leads to duplicate address conflicts in conjunction
1303 * with IPv6 if more than one instance uses the same card.
1304 *
1305 * The driver for these cards can deliver a unique 16-bit
1306 * identifier for each instance sharing the same card. It is
1307 * placed instead of 0xFFFE in the interface identifier. The
1308 * "u" bit of the interface identifier is not inverted in this
1309 * case. Hence the resulting interface identifier has local
1310 * scope according to RFC2373.
1311 */
1312 if (dev->dev_id) {
1313 eui[3] = (dev->dev_id >> 8) & 0xFF;
1314 eui[4] = dev->dev_id & 0xFF;
1315 } else {
1316 eui[3] = 0xFF;
1317 eui[4] = 0xFE;
1318 eui[0] ^= 2;
1319 }
1320 return 0;
1321 case ARPHRD_ARCNET:
1322 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1323 if (dev->addr_len != ARCNET_ALEN)
1324 return -1;
1325 memset(eui, 0, 7);
1326 eui[7] = *(u8*)dev->dev_addr;
1327 return 0;
1328 case ARPHRD_INFINIBAND:
1329 if (dev->addr_len != INFINIBAND_ALEN)
1330 return -1;
1331 memcpy(eui, dev->dev_addr + 12, 8);
1332 eui[0] |= 2;
1333 return 0;
1334 }
1335 return -1;
1336}
1337
1338static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1339{
1340 int err = -1;
1341 struct inet6_ifaddr *ifp;
1342
1343 read_lock_bh(&idev->lock);
1344 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1345 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1346 memcpy(eui, ifp->addr.s6_addr+8, 8);
1347 err = 0;
1348 break;
1349 }
1350 }
1351 read_unlock_bh(&idev->lock);
1352 return err;
1353}
1354
1355#ifdef CONFIG_IPV6_PRIVACY
1356/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1357static int __ipv6_regen_rndid(struct inet6_dev *idev)
1358{
1359 struct net_device *dev;
1360 struct scatterlist sg[2];
1361
378f058c
DH		 1362 sg_set_buf(&sg[0], idev->entropy, 8);
1363 sg_set_buf(&sg[1], idev->work_eui64, 8);
1da177e4
LT		 1364
1365 dev = idev->dev;
1366
1367 if (ipv6_generate_eui64(idev->work_eui64, dev)) {
1368 printk(KERN_INFO
1369 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1370 idev);
1371 get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
1372 }
1373regen:
1374 spin_lock(&md5_tfm_lock);
1375 if (unlikely(md5_tfm == NULL)) {
1376 spin_unlock(&md5_tfm_lock);
1377 return -1;
1378 }
1379 crypto_digest_init(md5_tfm);
1380 crypto_digest_update(md5_tfm, sg, 2);
1381 crypto_digest_final(md5_tfm, idev->work_digest);
1382 spin_unlock(&md5_tfm_lock);
1383
1384 memcpy(idev->rndid, &idev->work_digest[0], 8);
1385 idev->rndid[0] &= ~0x02;
1386 memcpy(idev->entropy, &idev->work_digest[8], 8);
1387
1388 /*
1389 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1390 * check if generated address is not inappropriate
1391 *
1392 * - Reserved subnet anycast (RFC 2526)
1393 * 11111101 11....11 1xxxxxxx
1394 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1395 * 00-00-5E-FE-xx-xx-xx-xx
1396 * - value 0
1397 * - XXX: already assigned to an address on the device
1398 */
1399 if (idev->rndid[0] == 0xfd &&
1400 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1401 (idev->rndid[7]&0x80))
1402 goto regen;
1403 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1404 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1405 goto regen;
1406 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1407 goto regen;
1408 }
1409
1410 return 0;
1411}
1412
1413static void ipv6_regen_rndid(unsigned long data)
1414{
1415 struct inet6_dev *idev = (struct inet6_dev *) data;
1416 unsigned long expires;
1417
1418 read_lock_bh(&addrconf_lock);
1419 write_lock_bh(&idev->lock);
1420
1421 if (idev->dead)
1422 goto out;
1423
1424 if (__ipv6_regen_rndid(idev) < 0)
1425 goto out;
1426
1427 expires = jiffies +
1428 idev->cnf.temp_prefered_lft * HZ -
1429 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1430 if (time_before(expires, jiffies)) {
1431 printk(KERN_WARNING
1432 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1433 idev->dev->name);
1434 goto out;
1435 }
1436
1437 if (!mod_timer(&idev->regen_timer, expires))
1438 in6_dev_hold(idev);
1439
1440out:
1441 write_unlock_bh(&idev->lock);
1442 read_unlock_bh(&addrconf_lock);
1443 in6_dev_put(idev);
1444}
1445
1446static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1447 int ret = 0;
1448
1449 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1450 ret = __ipv6_regen_rndid(idev);
1451 return ret;
1452}
1453#endif
1454
1455/*
1456 * Add prefix route.
1457 */
1458
1459static void
1460addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1461 unsigned long expires, u32 flags)
1da177e4
LT		 1462{
1463 struct in6_rtmsg rtmsg;
1464
1465 memset(&rtmsg, 0, sizeof(rtmsg));
1466 ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
1467 rtmsg.rtmsg_dst_len = plen;
1468 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1469 rtmsg.rtmsg_ifindex = dev->ifindex;
1470 rtmsg.rtmsg_info = expires;
1471 rtmsg.rtmsg_flags = RTF_UP|flags;
1472 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1473
1474 /* Prevent useless cloning on PtP SIT.
1475 This thing is done here expecting that the whole
1476 class of non-broadcast devices need not cloning.
1477 */
1478 if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
1479 rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
1480
0d51aa80 1481 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1482}
1483
1484/* Create "default" multicast route to the interface */
1485
1486static void addrconf_add_mroute(struct net_device *dev)
1487{
1488 struct in6_rtmsg rtmsg;
1489
1490 memset(&rtmsg, 0, sizeof(rtmsg));
1491 ipv6_addr_set(&rtmsg.rtmsg_dst,
1492 htonl(0xFF000000), 0, 0, 0);
1493 rtmsg.rtmsg_dst_len = 8;
1494 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1495 rtmsg.rtmsg_ifindex = dev->ifindex;
1496 rtmsg.rtmsg_flags = RTF_UP;
1497 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
0d51aa80 1498 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1499}
1500
1501static void sit_route_add(struct net_device *dev)
1502{
1503 struct in6_rtmsg rtmsg;
1504
1505 memset(&rtmsg, 0, sizeof(rtmsg));
1506
1507 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1508 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1509
1510 /* prefix length - 96 bits "::d.d.d.d" */
1511 rtmsg.rtmsg_dst_len = 96;
1512 rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
1513 rtmsg.rtmsg_ifindex = dev->ifindex;
1514
0d51aa80 1515 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1516}
1517
1518static void addrconf_add_lroute(struct net_device *dev)
1519{
1520 struct in6_addr addr;
1521
1522 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1523 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1524}
1525
1526static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1527{
1528 struct inet6_dev *idev;
1529
1530 ASSERT_RTNL();
1531
1532 if ((idev = ipv6_find_idev(dev)) == NULL)
1533 return NULL;
1534
1535 /* Add default multicast route */
1536 addrconf_add_mroute(dev);
1537
1538 /* Add link local route */
1539 addrconf_add_lroute(dev);
1540 return idev;
1541}
1542
1543void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1544{
1545 struct prefix_info *pinfo;
1546 __u32 valid_lft;
1547 __u32 prefered_lft;
1548 int addr_type;
1549 unsigned long rt_expires;
1550 struct inet6_dev *in6_dev;
1551
1552 pinfo = (struct prefix_info *) opt;
1553
1554 if (len < sizeof(struct prefix_info)) {
1555 ADBG(("addrconf: prefix option too short\n"));
1556 return;
1557 }
1558
1559 /*
1560 * Validation checks ([ADDRCONF], page 19)
1561 */
1562
1563 addr_type = ipv6_addr_type(&pinfo->prefix);
1564
1565 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1566 return;
1567
1568 valid_lft = ntohl(pinfo->valid);
1569 prefered_lft = ntohl(pinfo->prefered);
1570
1571 if (prefered_lft > valid_lft) {
1572 if (net_ratelimit())
1573 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1574 return;
1575 }
1576
1577 in6_dev = in6_dev_get(dev);
1578
1579 if (in6_dev == NULL) {
1580 if (net_ratelimit())
1581 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1582 return;
1583 }
1584
1585 /*
1586 * Two things going on here:
1587 * 1) Add routes for on-link prefixes
1588 * 2) Configure prefixes with the auto flag set
1589 */
1590
1591 /* Avoid arithmetic overflow. Really, we could
1592 save rt_expires in seconds, likely valid_lft,
1593 but it would require division in fib gc, that it
1594 not good.
1595 */
1596 if (valid_lft >= 0x7FFFFFFF/HZ)
1597 rt_expires = 0;
1598 else
1599 rt_expires = jiffies + valid_lft * HZ;
1600
1601 if (pinfo->onlink) {
1602 struct rt6_info *rt;
1603 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1604
1605 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1606 if (rt->rt6i_flags&RTF_EXPIRES) {
1607 if (valid_lft == 0) {
0d51aa80 1608 ip6_del_rt(rt, NULL, NULL, NULL);
1da177e4
LT		 1609 rt = NULL;
1610 } else {
1611 rt->rt6i_expires = rt_expires;
1612 }
1613 }
1614 } else if (valid_lft) {
1615 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
1616 dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1617 }
1618 if (rt)
1619 dst_release(&rt->u.dst);
1620 }
1621
1622 /* Try to figure out our local address for this prefix */
1623
1624 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1625 struct inet6_ifaddr * ifp;
1626 struct in6_addr addr;
1627 int create = 0, update_lft = 0;
1628
1629 if (pinfo->prefix_len == 64) {
1630 memcpy(&addr, &pinfo->prefix, 8);
1631 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1632 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1633 in6_dev_put(in6_dev);
1634 return;
1635 }
1636 goto ok;
1637 }
1638 if (net_ratelimit())
1639 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1640 pinfo->prefix_len);
1641 in6_dev_put(in6_dev);
1642 return;
1643
1644ok:
1645
1646 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1647
1648 if (ifp == NULL && valid_lft) {
1649 int max_addresses = in6_dev->cnf.max_addresses;
1650
1651 /* Do not allow to create too much of autoconfigured
1652 * addresses; this would be too easy way to crash kernel.
1653 */
1654 if (!max_addresses ||
1655 ipv6_count_addresses(in6_dev) < max_addresses)
1656 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1657 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1658
1659 if (!ifp || IS_ERR(ifp)) {
1660 in6_dev_put(in6_dev);
1661 return;
1662 }
1663
1664 update_lft = create = 1;
1665 ifp->cstamp = jiffies;
1666 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1667 }
1668
1669 if (ifp) {
1670 int flags;
1671 unsigned long now;
1672#ifdef CONFIG_IPV6_PRIVACY
1673 struct inet6_ifaddr *ift;
1674#endif
1675 u32 stored_lft;
1676
1677 /* update lifetime (RFC2462 5.5.3 e) */
1678 spin_lock(&ifp->lock);
1679 now = jiffies;
1680 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1681 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1682 else
1683 stored_lft = 0;
1684 if (!update_lft && stored_lft) {
1685 if (valid_lft > MIN_VALID_LIFETIME ||
1686 valid_lft > stored_lft)
1687 update_lft = 1;
1688 else if (stored_lft <= MIN_VALID_LIFETIME) {
1689 /* valid_lft <= stored_lft is always true */
1690 /* XXX: IPsec */
1691 update_lft = 0;
1692 } else {
1693 valid_lft = MIN_VALID_LIFETIME;
1694 if (valid_lft < prefered_lft)
1695 prefered_lft = valid_lft;
1696 update_lft = 1;
1697 }
1698 }
1699
1700 if (update_lft) {
1701 ifp->valid_lft = valid_lft;
1702 ifp->prefered_lft = prefered_lft;
1703 ifp->tstamp = now;
1704 flags = ifp->flags;
1705 ifp->flags &= ~IFA_F_DEPRECATED;
1706 spin_unlock(&ifp->lock);
1707
1708 if (!(flags&IFA_F_TENTATIVE))
1709 ipv6_ifa_notify(0, ifp);
1710 } else
1711 spin_unlock(&ifp->lock);
1712
1713#ifdef CONFIG_IPV6_PRIVACY
1714 read_lock_bh(&in6_dev->lock);
1715 /* update all temporary addresses in the list */
1716 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1717 /*
1718 * When adjusting the lifetimes of an existing
1719 * temporary address, only lower the lifetimes.
1720 * Implementations must not increase the
1721 * lifetimes of an existing temporary address
1722 * when processing a Prefix Information Option.
1723 */
1724 spin_lock(&ift->lock);
1725 flags = ift->flags;
1726 if (ift->valid_lft > valid_lft &&
1727 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1728 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1729 if (ift->prefered_lft > prefered_lft &&
1730 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1731 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1732 spin_unlock(&ift->lock);
1733 if (!(flags&IFA_F_TENTATIVE))
1734 ipv6_ifa_notify(0, ift);
1735 }
1736
1737 if (create && in6_dev->cnf.use_tempaddr > 0) {
1738 /*
1739 * When a new public address is created as described in [ADDRCONF],
1740 * also create a new temporary address.
1741 */
1742 read_unlock_bh(&in6_dev->lock);
1743 ipv6_create_tempaddr(ifp, NULL);
1744 } else {
1745 read_unlock_bh(&in6_dev->lock);
1746 }
1747#endif
1748 in6_ifa_put(ifp);
1749 addrconf_verify(0);
1750 }
1751 }
1752 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1753 in6_dev_put(in6_dev);
1754}
1755
1756/*
1757 * Set destination address.
1758 * Special case for SIT interfaces where we create a new "virtual"
1759 * device.
1760 */
1761int addrconf_set_dstaddr(void __user *arg)
1762{
1763 struct in6_ifreq ireq;
1764 struct net_device *dev;
1765 int err = -EINVAL;
1766
1767 rtnl_lock();
1768
1769 err = -EFAULT;
1770 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1771 goto err_exit;
1772
1773 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1774
1775 err = -ENODEV;
1776 if (dev == NULL)
1777 goto err_exit;
1778
1779 if (dev->type == ARPHRD_SIT) {
1780 struct ifreq ifr;
1781 mm_segment_t oldfs;
1782 struct ip_tunnel_parm p;
1783
1784 err = -EADDRNOTAVAIL;
1785 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1786 goto err_exit;
1787
1788 memset(&p, 0, sizeof(p));
1789 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1790 p.iph.saddr = 0;
1791 p.iph.version = 4;
1792 p.iph.ihl = 5;
1793 p.iph.protocol = IPPROTO_IPV6;
1794 p.iph.ttl = 64;
1795 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1796
1797 oldfs = get_fs(); set_fs(KERNEL_DS);
1798 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1799 set_fs(oldfs);
1800
1801 if (err == 0) {
1802 err = -ENOBUFS;
1803 if ((dev = __dev_get_by_name(p.name)) == NULL)
1804 goto err_exit;
1805 err = dev_open(dev);
1806 }
1807 }
1808
1809err_exit:
1810 rtnl_unlock();
1811 return err;
1812}
1813
1814/*
1815 * Manual configuration of address on an interface
1816 */
1817static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
1818{
1819 struct inet6_ifaddr *ifp;
1820 struct inet6_dev *idev;
1821 struct net_device *dev;
1822 int scope;
1823
1824 ASSERT_RTNL();
1825
1826 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1827 return -ENODEV;
1828
1829 if (!(dev->flags&IFF_UP))
1830 return -ENETDOWN;
1831
1832 if ((idev = addrconf_add_dev(dev)) == NULL)
1833 return -ENOBUFS;
1834
1835 scope = ipv6_addr_scope(pfx);
1836
1837 ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
1838 if (!IS_ERR(ifp)) {
1839 addrconf_dad_start(ifp, 0);
1840 in6_ifa_put(ifp);
1841 return 0;
1842 }
1843
1844 return PTR_ERR(ifp);
1845}
1846
1847static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1848{
1849 struct inet6_ifaddr *ifp;
1850 struct inet6_dev *idev;
1851 struct net_device *dev;
1852
1853 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1854 return -ENODEV;
1855
1856 if ((idev = __in6_dev_get(dev)) == NULL)
1857 return -ENXIO;
1858
1859 read_lock_bh(&idev->lock);
1860 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1861 if (ifp->prefix_len == plen &&
1862 ipv6_addr_equal(pfx, &ifp->addr)) {
1863 in6_ifa_hold(ifp);
1864 read_unlock_bh(&idev->lock);
1865
1866 ipv6_del_addr(ifp);
1867
1868 /* If the last address is deleted administratively,
1869 disable IPv6 on this interface.
1870 */
1871 if (idev->addr_list == NULL)
1872 addrconf_ifdown(idev->dev, 1);
1873 return 0;
1874 }
1875 }
1876 read_unlock_bh(&idev->lock);
1877 return -EADDRNOTAVAIL;
1878}
1879
1880
1881int addrconf_add_ifaddr(void __user *arg)
1882{
1883 struct in6_ifreq ireq;
1884 int err;
1885
1886 if (!capable(CAP_NET_ADMIN))
1887 return -EPERM;
1888
1889 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1890 return -EFAULT;
1891
1892 rtnl_lock();
1893 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1894 rtnl_unlock();
1895 return err;
1896}
1897
1898int addrconf_del_ifaddr(void __user *arg)
1899{
1900 struct in6_ifreq ireq;
1901 int err;
1902
1903 if (!capable(CAP_NET_ADMIN))
1904 return -EPERM;
1905
1906 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1907 return -EFAULT;
1908
1909 rtnl_lock();
1910 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1911 rtnl_unlock();
1912 return err;
1913}
1914
1915static void sit_add_v4_addrs(struct inet6_dev *idev)
1916{
1917 struct inet6_ifaddr * ifp;
1918 struct in6_addr addr;
1919 struct net_device *dev;
1920 int scope;
1921
1922 ASSERT_RTNL();
1923
1924 memset(&addr, 0, sizeof(struct in6_addr));
1925 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1926
1927 if (idev->dev->flags&IFF_POINTOPOINT) {
1928 addr.s6_addr32[0] = htonl(0xfe800000);
1929 scope = IFA_LINK;
1930 } else {
1931 scope = IPV6_ADDR_COMPATv4;
1932 }
1933
1934 if (addr.s6_addr32[3]) {
1935 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1936 if (!IS_ERR(ifp)) {
1937 spin_lock_bh(&ifp->lock);
1938 ifp->flags &= ~IFA_F_TENTATIVE;
1939 spin_unlock_bh(&ifp->lock);
1940 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1941 in6_ifa_put(ifp);
1942 }
1943 return;
1944 }
1945
1946 for (dev = dev_base; dev != NULL; dev = dev->next) {
e5ed6399 1947 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 1948 if (in_dev && (dev->flags & IFF_UP)) {
1949 struct in_ifaddr * ifa;
1950
1951 int flag = scope;
1952
1953 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
1954 int plen;
1955
1956 addr.s6_addr32[3] = ifa->ifa_local;
1957
1958 if (ifa->ifa_scope == RT_SCOPE_LINK)
1959 continue;
1960 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
1961 if (idev->dev->flags&IFF_POINTOPOINT)
1962 continue;
1963 flag |= IFA_HOST;
1964 }
1965 if (idev->dev->flags&IFF_POINTOPOINT)
1966 plen = 64;
1967 else
1968 plen = 96;
1969
1970 ifp = ipv6_add_addr(idev, &addr, plen, flag,
1971 IFA_F_PERMANENT);
1972 if (!IS_ERR(ifp)) {
1973 spin_lock_bh(&ifp->lock);
1974 ifp->flags &= ~IFA_F_TENTATIVE;
1975 spin_unlock_bh(&ifp->lock);
1976 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1977 in6_ifa_put(ifp);
1978 }
1979 }
1980 }
1981 }
1982}
1983
1984static void init_loopback(struct net_device *dev)
1985{
1986 struct inet6_dev *idev;
1987 struct inet6_ifaddr * ifp;
1988
1989 /* ::1 */
1990
1991 ASSERT_RTNL();
1992
1993 if ((idev = ipv6_find_idev(dev)) == NULL) {
1994 printk(KERN_DEBUG "init loopback: add_dev failed\n");
1995 return;
1996 }
1997
1998 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
1999 if (!IS_ERR(ifp)) {
2000 spin_lock_bh(&ifp->lock);
2001 ifp->flags &= ~IFA_F_TENTATIVE;
2002 spin_unlock_bh(&ifp->lock);
2003 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2004 in6_ifa_put(ifp);
2005 }
2006}
2007
2008static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2009{
2010 struct inet6_ifaddr * ifp;
2011
2012 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2013 if (!IS_ERR(ifp)) {
2014 addrconf_dad_start(ifp, 0);
2015 in6_ifa_put(ifp);
2016 }
2017}
2018
2019static void addrconf_dev_config(struct net_device *dev)
2020{
2021 struct in6_addr addr;
2022 struct inet6_dev * idev;
2023
2024 ASSERT_RTNL();
2025
2026 if ((dev->type != ARPHRD_ETHER) &&
2027 (dev->type != ARPHRD_FDDI) &&
2028 (dev->type != ARPHRD_IEEE802_TR) &&
2029 (dev->type != ARPHRD_ARCNET) &&
2030 (dev->type != ARPHRD_INFINIBAND)) {
2031 /* Alas, we support only Ethernet autoconfiguration. */
2032 return;
2033 }
2034
2035 idev = addrconf_add_dev(dev);
2036 if (idev == NULL)
2037 return;
2038
2039 memset(&addr, 0, sizeof(struct in6_addr));
2040 addr.s6_addr32[0] = htonl(0xFE800000);
2041
2042 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2043 addrconf_add_linklocal(idev, &addr);
2044}
2045
2046static void addrconf_sit_config(struct net_device *dev)
2047{
2048 struct inet6_dev *idev;
2049
2050 ASSERT_RTNL();
2051
2052 /*
2053 * Configure the tunnel with one of our IPv4
2054 * addresses... we should configure all of
2055 * our v4 addrs in the tunnel
2056 */
2057
2058 if ((idev = ipv6_find_idev(dev)) == NULL) {
2059 printk(KERN_DEBUG "init sit: add_dev failed\n");
2060 return;
2061 }
2062
2063 sit_add_v4_addrs(idev);
2064
2065 if (dev->flags&IFF_POINTOPOINT) {
2066 addrconf_add_mroute(dev);
2067 addrconf_add_lroute(dev);
2068 } else
2069 sit_route_add(dev);
2070}
2071
2072static inline int
2073ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2074{
2075 struct in6_addr lladdr;
2076
2077 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2078 addrconf_add_linklocal(idev, &lladdr);
2079 return 0;
2080 }
2081 return -1;
2082}
2083
2084static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2085{
2086 struct net_device *link_dev;
2087
2088 /* first try to inherit the link-local address from the link device */
2089 if (idev->dev->iflink &&
2090 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2091 if (!ipv6_inherit_linklocal(idev, link_dev))
2092 return;
2093 }
2094 /* then try to inherit it from any device */
2095 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2096 if (!ipv6_inherit_linklocal(idev, link_dev))
2097 return;
2098 }
2099 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2100}
2101
2102/*
2103 * Autoconfigure tunnel with a link-local address so routing protocols,
2104 * DHCPv6, MLD etc. can be run over the virtual link
2105 */
2106
2107static void addrconf_ip6_tnl_config(struct net_device *dev)
2108{
2109 struct inet6_dev *idev;
2110
2111 ASSERT_RTNL();
2112
2113 if ((idev = addrconf_add_dev(dev)) == NULL) {
2114 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2115 return;
2116 }
2117 ip6_tnl_add_linklocal(idev);
2118 addrconf_add_mroute(dev);
2119}
2120
2121static int addrconf_notify(struct notifier_block *this, unsigned long event,
2122 void * data)
2123{
2124 struct net_device *dev = (struct net_device *) data;
2125 struct inet6_dev *idev = __in6_dev_get(dev);
2126
2127 switch(event) {
2128 case NETDEV_UP:
2129 switch(dev->type) {
2130 case ARPHRD_SIT:
2131 addrconf_sit_config(dev);
2132 break;
2133 case ARPHRD_TUNNEL6:
2134 addrconf_ip6_tnl_config(dev);
2135 break;
2136 case ARPHRD_LOOPBACK:
2137 init_loopback(dev);
2138 break;
2139
2140 default:
2141 addrconf_dev_config(dev);
2142 break;
2143 };
2144 if (idev) {
2145 /* If the MTU changed during the interface down, when the
2146 interface up, the changed MTU must be reflected in the
2147 idev as well as routers.
2148 */
2149 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2150 rt6_mtu_change(dev, dev->mtu);
2151 idev->cnf.mtu6 = dev->mtu;
2152 }
2153 idev->tstamp = jiffies;
2154 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2155 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2156 stop IPv6 on this interface.
2157 */
2158 if (dev->mtu < IPV6_MIN_MTU)
2159 addrconf_ifdown(dev, event != NETDEV_DOWN);
2160 }
2161 break;
2162
2163 case NETDEV_CHANGEMTU:
2164 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2165 rt6_mtu_change(dev, dev->mtu);
2166 idev->cnf.mtu6 = dev->mtu;
2167 break;
2168 }
2169
2170 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2171
2172 case NETDEV_DOWN:
2173 case NETDEV_UNREGISTER:
2174 /*
2175 * Remove all addresses from this interface.
2176 */
2177 addrconf_ifdown(dev, event != NETDEV_DOWN);
2178 break;
2179 case NETDEV_CHANGE:
2180 break;
2181 case NETDEV_CHANGENAME:
2182#ifdef CONFIG_SYSCTL
2183 if (idev) {
2184 addrconf_sysctl_unregister(&idev->cnf);
2185 neigh_sysctl_unregister(idev->nd_parms);
2186 neigh_sysctl_register(dev, idev->nd_parms,
2187 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2188 &ndisc_ifinfo_sysctl_change,
2189 NULL);
2190 addrconf_sysctl_register(idev, &idev->cnf);
2191 }
2192#endif
2193 break;
2194 };
2195
2196 return NOTIFY_OK;
2197}
2198
2199/*
2200 * addrconf module should be notified of a device going up
2201 */
2202static struct notifier_block ipv6_dev_notf = {
2203 .notifier_call = addrconf_notify,
2204 .priority = 0
2205};
2206
2207static int addrconf_ifdown(struct net_device *dev, int how)
2208{
2209 struct inet6_dev *idev;
2210 struct inet6_ifaddr *ifa, **bifa;
2211 int i;
2212
2213 ASSERT_RTNL();
2214
2215 if (dev == &loopback_dev && how == 1)
2216 how = 0;
2217
2218 rt6_ifdown(dev);
2219 neigh_ifdown(&nd_tbl, dev);
2220
2221 idev = __in6_dev_get(dev);
2222 if (idev == NULL)
2223 return -ENODEV;
2224
2225 /* Step 1: remove reference to ipv6 device from parent device.
2226 Do not dev_put!
2227 */
2228 if (how == 1) {
2229 write_lock_bh(&addrconf_lock);
2230 dev->ip6_ptr = NULL;
2231 idev->dead = 1;
2232 write_unlock_bh(&addrconf_lock);
2233
2234 /* Step 1.5: remove snmp6 entry */
2235 snmp6_unregister_dev(idev);
2236
2237 }
2238
2239 /* Step 2: clear hash table */
2240 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2241 bifa = &inet6_addr_lst[i];
2242
2243 write_lock_bh(&addrconf_hash_lock);
2244 while ((ifa = *bifa) != NULL) {
2245 if (ifa->idev == idev) {
2246 *bifa = ifa->lst_next;
2247 ifa->lst_next = NULL;
2248 addrconf_del_timer(ifa);
2249 in6_ifa_put(ifa);
2250 continue;
2251 }
2252 bifa = &ifa->lst_next;
2253 }
2254 write_unlock_bh(&addrconf_hash_lock);
2255 }
2256
2257 write_lock_bh(&idev->lock);
2258
2259 /* Step 3: clear flags for stateless addrconf */
2260 if (how != 1)
2261 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
2262
2263 /* Step 4: clear address list */
2264#ifdef CONFIG_IPV6_PRIVACY
2265 if (how == 1 && del_timer(&idev->regen_timer))
2266 in6_dev_put(idev);
2267
2268 /* clear tempaddr list */
2269 while ((ifa = idev->tempaddr_list) != NULL) {
2270 idev->tempaddr_list = ifa->tmp_next;
2271 ifa->tmp_next = NULL;
2272 ifa->dead = 1;
2273 write_unlock_bh(&idev->lock);
2274 spin_lock_bh(&ifa->lock);
2275
2276 if (ifa->ifpub) {
2277 in6_ifa_put(ifa->ifpub);
2278 ifa->ifpub = NULL;
2279 }
2280 spin_unlock_bh(&ifa->lock);
2281 in6_ifa_put(ifa);
2282 write_lock_bh(&idev->lock);
2283 }
2284#endif
2285 while ((ifa = idev->addr_list) != NULL) {
2286 idev->addr_list = ifa->if_next;
2287 ifa->if_next = NULL;
2288 ifa->dead = 1;
2289 addrconf_del_timer(ifa);
2290 write_unlock_bh(&idev->lock);
2291
2292 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2293 in6_ifa_put(ifa);
2294
2295 write_lock_bh(&idev->lock);
2296 }
2297 write_unlock_bh(&idev->lock);
2298
2299 /* Step 5: Discard multicast list */
2300
2301 if (how == 1)
2302 ipv6_mc_destroy_dev(idev);
2303 else
2304 ipv6_mc_down(idev);
2305
2306 /* Step 5: netlink notification of this interface */
2307 idev->tstamp = jiffies;
979ad663 2308 inet6_ifinfo_notify(RTM_DELLINK, idev);
1da177e4
LT		 2309
2310 /* Shot the device (if unregistered) */
2311
2312 if (how == 1) {
2313#ifdef CONFIG_SYSCTL
2314 addrconf_sysctl_unregister(&idev->cnf);
2315 neigh_sysctl_unregister(idev->nd_parms);
2316#endif
2317 neigh_parms_release(&nd_tbl, idev->nd_parms);
2318 neigh_ifdown(&nd_tbl, dev);
2319 in6_dev_put(idev);
2320 }
2321 return 0;
2322}
2323
2324static void addrconf_rs_timer(unsigned long data)
2325{
2326 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2327
2328 if (ifp->idev->cnf.forwarding)
2329 goto out;
2330
2331 if (ifp->idev->if_flags & IF_RA_RCVD) {
2332 /*
2333 * Announcement received after solicitation
2334 * was sent
2335 */
2336 goto out;
2337 }
2338
2339 spin_lock(&ifp->lock);
2340 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2341 struct in6_addr all_routers;
2342
2343 /* The wait after the last probe can be shorter */
2344 addrconf_mod_timer(ifp, AC_RS,
2345 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2346 ifp->idev->cnf.rtr_solicit_delay :
2347 ifp->idev->cnf.rtr_solicit_interval);
2348 spin_unlock(&ifp->lock);
2349
2350 ipv6_addr_all_routers(&all_routers);
2351
2352 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2353 } else {
2354 spin_unlock(&ifp->lock);
2355 /*
2356 * Note: we do not support deprecated "all on-link"
2357 * assumption any longer.
2358 */
2359 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2360 ifp->idev->dev->name);
2361 }
2362
2363out:
2364 in6_ifa_put(ifp);
2365}
2366
2367/*
2368 * Duplicate Address Detection
2369 */
e431b8c0 2370static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2371{
2372 struct inet6_dev *idev = ifp->idev;
2373 struct net_device *dev = idev->dev;
2374 unsigned long rand_num;
2375
2376 addrconf_join_solict(dev, &ifp->addr);
2377
2378 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2379 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2380 flags);
2381
2382 net_srandom(ifp->addr.s6_addr32[3]);
2383 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2384
2385 read_lock_bh(&idev->lock);
2386 if (ifp->dead)
2387 goto out;
2388 spin_lock_bh(&ifp->lock);
2389
2390 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2391 !(ifp->flags&IFA_F_TENTATIVE)) {
2392 ifp->flags &= ~IFA_F_TENTATIVE;
2393 spin_unlock_bh(&ifp->lock);
2394 read_unlock_bh(&idev->lock);
2395
2396 addrconf_dad_completed(ifp);
2397 return;
2398 }
2399
2400 ifp->probes = idev->cnf.dad_transmits;
2401 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2402
2403 spin_unlock_bh(&ifp->lock);
2404out:
2405 read_unlock_bh(&idev->lock);
2406}
2407
2408static void addrconf_dad_timer(unsigned long data)
2409{
2410 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2411 struct inet6_dev *idev = ifp->idev;
2412 struct in6_addr unspec;
2413 struct in6_addr mcaddr;
2414
2415 read_lock_bh(&idev->lock);
2416 if (idev->dead) {
2417 read_unlock_bh(&idev->lock);
2418 goto out;
2419 }
2420 spin_lock_bh(&ifp->lock);
2421 if (ifp->probes == 0) {
2422 /*
2423 * DAD was successful
2424 */
2425
2426 ifp->flags &= ~IFA_F_TENTATIVE;
2427 spin_unlock_bh(&ifp->lock);
2428 read_unlock_bh(&idev->lock);
2429
2430 addrconf_dad_completed(ifp);
2431
2432 goto out;
2433 }
2434
2435 ifp->probes--;
2436 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2437 spin_unlock_bh(&ifp->lock);
2438 read_unlock_bh(&idev->lock);
2439
2440 /* send a neighbour solicitation for our addr */
2441 memset(&unspec, 0, sizeof(unspec));
2442 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2443 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2444out:
2445 in6_ifa_put(ifp);
2446}
2447
2448static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2449{
2450 struct net_device * dev = ifp->idev->dev;
2451
2452 /*
2453 * Configure the address for reception. Now it is valid.
2454 */
2455
2456 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2457
2458 /* If added prefix is link local and forwarding is off,
2459 start sending router solicitations.
2460 */
2461
2462 if (ifp->idev->cnf.forwarding == 0 &&
2463 ifp->idev->cnf.rtr_solicits > 0 &&
2464 (dev->flags&IFF_LOOPBACK) == 0 &&
2465 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2466 struct in6_addr all_routers;
2467
2468 ipv6_addr_all_routers(&all_routers);
2469
2470 /*
2471 * If a host as already performed a random delay
2472 * [...] as part of DAD [...] there is no need
2473 * to delay again before sending the first RS
2474 */
2475 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2476
2477 spin_lock_bh(&ifp->lock);
2478 ifp->probes = 1;
2479 ifp->idev->if_flags |= IF_RS_SENT;
2480 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2481 spin_unlock_bh(&ifp->lock);
2482 }
2483}
2484
2485#ifdef CONFIG_PROC_FS
2486struct if6_iter_state {
2487 int bucket;
2488};
2489
2490static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2491{
2492 struct inet6_ifaddr *ifa = NULL;
2493 struct if6_iter_state *state = seq->private;
2494
2495 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2496 ifa = inet6_addr_lst[state->bucket];
2497 if (ifa)
2498 break;
2499 }
2500 return ifa;
2501}
2502
2503static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2504{
2505 struct if6_iter_state *state = seq->private;
2506
2507 ifa = ifa->lst_next;
2508try_again:
2509 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2510 ifa = inet6_addr_lst[state->bucket];
2511 goto try_again;
2512 }
2513 return ifa;
2514}
2515
2516static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2517{
2518 struct inet6_ifaddr *ifa = if6_get_first(seq);
2519
2520 if (ifa)
2521 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2522 --pos;
2523 return pos ? NULL : ifa;
2524}
2525
2526static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2527{
2528 read_lock_bh(&addrconf_hash_lock);
2529 return if6_get_idx(seq, *pos);
2530}
2531
2532static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2533{
2534 struct inet6_ifaddr *ifa;
2535
2536 ifa = if6_get_next(seq, v);
2537 ++*pos;
2538 return ifa;
2539}
2540
2541static void if6_seq_stop(struct seq_file *seq, void *v)
2542{
2543 read_unlock_bh(&addrconf_hash_lock);
2544}
2545
2546static int if6_seq_show(struct seq_file *seq, void *v)
2547{
2548 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2549 seq_printf(seq,
2550 "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
2551 NIP6(ifp->addr),
2552 ifp->idev->dev->ifindex,
2553 ifp->prefix_len,
2554 ifp->scope,
2555 ifp->flags,
2556 ifp->idev->dev->name);
2557 return 0;
2558}
2559
2560static struct seq_operations if6_seq_ops = {
2561 .start = if6_seq_start,
2562 .next = if6_seq_next,
2563 .show = if6_seq_show,
2564 .stop = if6_seq_stop,
2565};
2566
2567static int if6_seq_open(struct inode *inode, struct file *file)
2568{
2569 struct seq_file *seq;
2570 int rc = -ENOMEM;
2571 struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2572
2573 if (!s)
2574 goto out;
2575 memset(s, 0, sizeof(*s));
2576
2577 rc = seq_open(file, &if6_seq_ops);
2578 if (rc)
2579 goto out_kfree;
2580
2581 seq = file->private_data;
2582 seq->private = s;
2583out:
2584 return rc;
2585out_kfree:
2586 kfree(s);
2587 goto out;
2588}
2589
2590static struct file_operations if6_fops = {
2591 .owner = THIS_MODULE,
2592 .open = if6_seq_open,
2593 .read = seq_read,
2594 .llseek = seq_lseek,
2595 .release = seq_release_private,
2596};
2597
2598int __init if6_proc_init(void)
2599{
2600 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2601 return -ENOMEM;
2602 return 0;
2603}
2604
2605void if6_proc_exit(void)
2606{
2607 proc_net_remove("if_inet6");
2608}
2609#endif /* CONFIG_PROC_FS */
2610
2611/*
2612 * Periodic address status verification
2613 */
2614
2615static void addrconf_verify(unsigned long foo)
2616{
2617 struct inet6_ifaddr *ifp;
2618 unsigned long now, next;
2619 int i;
2620
2621 spin_lock_bh(&addrconf_verify_lock);
2622 now = jiffies;
2623 next = now + ADDR_CHECK_FREQUENCY;
2624
2625 del_timer(&addr_chk_timer);
2626
2627 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2628
2629restart:
2630 write_lock(&addrconf_hash_lock);
2631 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2632 unsigned long age;
2633#ifdef CONFIG_IPV6_PRIVACY
2634 unsigned long regen_advance;
2635#endif
2636
2637 if (ifp->flags & IFA_F_PERMANENT)
2638 continue;
2639
2640 spin_lock(&ifp->lock);
2641 age = (now - ifp->tstamp) / HZ;
2642
2643#ifdef CONFIG_IPV6_PRIVACY
2644 regen_advance = ifp->idev->cnf.regen_max_retry *
2645 ifp->idev->cnf.dad_transmits *
2646 ifp->idev->nd_parms->retrans_time / HZ;
2647#endif
2648
2649 if (age >= ifp->valid_lft) {
2650 spin_unlock(&ifp->lock);
2651 in6_ifa_hold(ifp);
2652 write_unlock(&addrconf_hash_lock);
2653 ipv6_del_addr(ifp);
2654 goto restart;
2655 } else if (age >= ifp->prefered_lft) {
2656 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2657 int deprecate = 0;
2658
2659 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2660 deprecate = 1;
2661 ifp->flags |= IFA_F_DEPRECATED;
2662 }
2663
2664 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2665 next = ifp->tstamp + ifp->valid_lft * HZ;
2666
2667 spin_unlock(&ifp->lock);
2668
2669 if (deprecate) {
2670 in6_ifa_hold(ifp);
2671 write_unlock(&addrconf_hash_lock);
2672
2673 ipv6_ifa_notify(0, ifp);
2674 in6_ifa_put(ifp);
2675 goto restart;
2676 }
2677#ifdef CONFIG_IPV6_PRIVACY
2678 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2679 !(ifp->flags&IFA_F_TENTATIVE)) {
2680 if (age >= ifp->prefered_lft - regen_advance) {
2681 struct inet6_ifaddr *ifpub = ifp->ifpub;
2682 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2683 next = ifp->tstamp + ifp->prefered_lft * HZ;
2684 if (!ifp->regen_count && ifpub) {
2685 ifp->regen_count++;
2686 in6_ifa_hold(ifp);
2687 in6_ifa_hold(ifpub);
2688 spin_unlock(&ifp->lock);
2689 write_unlock(&addrconf_hash_lock);
2690 ipv6_create_tempaddr(ifpub, ifp);
2691 in6_ifa_put(ifpub);
2692 in6_ifa_put(ifp);
2693 goto restart;
2694 }
2695 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2696 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2697 spin_unlock(&ifp->lock);
2698#endif
2699 } else {
2700 /* ifp->prefered_lft <= ifp->valid_lft */
2701 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2702 next = ifp->tstamp + ifp->prefered_lft * HZ;
2703 spin_unlock(&ifp->lock);
2704 }
2705 }
2706 write_unlock(&addrconf_hash_lock);
2707 }
2708
2709 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2710 add_timer(&addr_chk_timer);
2711 spin_unlock_bh(&addrconf_verify_lock);
2712}
2713
2714static int
2715inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2716{
2717 struct rtattr **rta = arg;
2718 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2719 struct in6_addr *pfx;
2720
2721 pfx = NULL;
2722 if (rta[IFA_ADDRESS-1]) {
2723 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2724 return -EINVAL;
2725 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2726 }
2727 if (rta[IFA_LOCAL-1]) {
2728 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2729 return -EINVAL;
2730 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2731 }
2732 if (pfx == NULL)
2733 return -EINVAL;
2734
2735 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2736}
2737
2738static int
2739inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2740{
2741 struct rtattr **rta = arg;
2742 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2743 struct in6_addr *pfx;
2744
2745 pfx = NULL;
2746 if (rta[IFA_ADDRESS-1]) {
2747 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2748 return -EINVAL;
2749 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2750 }
2751 if (rta[IFA_LOCAL-1]) {
2752 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2753 return -EINVAL;
2754 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2755 }
2756 if (pfx == NULL)
2757 return -EINVAL;
2758
2759 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2760}
2761
2762static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 2763 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2764{
2765 struct ifaddrmsg *ifm;
2766 struct nlmsghdr *nlh;
2767 struct ifa_cacheinfo ci;
2768 unsigned char *b = skb->tail;
2769
b6544c0b 2770 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2771 ifm = NLMSG_DATA(nlh);
2772 ifm->ifa_family = AF_INET6;
2773 ifm->ifa_prefixlen = ifa->prefix_len;
2774 ifm->ifa_flags = ifa->flags;
2775 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2776 if (ifa->scope&IFA_HOST)
2777 ifm->ifa_scope = RT_SCOPE_HOST;
2778 else if (ifa->scope&IFA_LINK)
2779 ifm->ifa_scope = RT_SCOPE_LINK;
2780 else if (ifa->scope&IFA_SITE)
2781 ifm->ifa_scope = RT_SCOPE_SITE;
2782 ifm->ifa_index = ifa->idev->dev->ifindex;
2783 RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
2784 if (!(ifa->flags&IFA_F_PERMANENT)) {
2785 ci.ifa_prefered = ifa->prefered_lft;
2786 ci.ifa_valid = ifa->valid_lft;
2787 if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
2788 long tval = (jiffies - ifa->tstamp)/HZ;
2789 ci.ifa_prefered -= tval;
2790 if (ci.ifa_valid != INFINITY_LIFE_TIME)
2791 ci.ifa_valid -= tval;
2792 }
2793 } else {
2794 ci.ifa_prefered = INFINITY_LIFE_TIME;
2795 ci.ifa_valid = INFINITY_LIFE_TIME;
2796 }
2797 ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
2798 + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2799 ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
2800 + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2801 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2802 nlh->nlmsg_len = skb->tail - b;
2803 return skb->len;
2804
2805nlmsg_failure:
2806rtattr_failure:
2807 skb_trim(skb, b - skb->data);
2808 return -1;
2809}
2810
2811static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 2812 u32 pid, u32 seq, int event, u16 flags)
1da177e4
LT		 2813{
2814 struct ifaddrmsg *ifm;
2815 struct nlmsghdr *nlh;
2816 struct ifa_cacheinfo ci;
2817 unsigned char *b = skb->tail;
2818
b6544c0b 2819 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2820 ifm = NLMSG_DATA(nlh);
2821 ifm->ifa_family = AF_INET6;
2822 ifm->ifa_prefixlen = 128;
2823 ifm->ifa_flags = IFA_F_PERMANENT;
2824 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2825 if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
2826 ifm->ifa_scope = RT_SCOPE_SITE;
2827 ifm->ifa_index = ifmca->idev->dev->ifindex;
2828 RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
2829 ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
2830 * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
2831 * 100 / HZ);
2832 ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
2833 * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
2834 * 100 / HZ);
2835 ci.ifa_prefered = INFINITY_LIFE_TIME;
2836 ci.ifa_valid = INFINITY_LIFE_TIME;
2837 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2838 nlh->nlmsg_len = skb->tail - b;
2839 return skb->len;
2840
2841nlmsg_failure:
2842rtattr_failure:
2843 skb_trim(skb, b - skb->data);
2844 return -1;
2845}
2846
2847static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 2848 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2849{
2850 struct ifaddrmsg *ifm;
2851 struct nlmsghdr *nlh;
2852 struct ifa_cacheinfo ci;
2853 unsigned char *b = skb->tail;
2854
b6544c0b 2855 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2856 ifm = NLMSG_DATA(nlh);
2857 ifm->ifa_family = AF_INET6;
2858 ifm->ifa_prefixlen = 128;
2859 ifm->ifa_flags = IFA_F_PERMANENT;
2860 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2861 if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
2862 ifm->ifa_scope = RT_SCOPE_SITE;
2863 ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
2864 RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
2865 ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
2866 * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
2867 * 100 / HZ);
2868 ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
2869 * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
2870 * 100 / HZ);
2871 ci.ifa_prefered = INFINITY_LIFE_TIME;
2872 ci.ifa_valid = INFINITY_LIFE_TIME;
2873 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2874 nlh->nlmsg_len = skb->tail - b;
2875 return skb->len;
2876
2877nlmsg_failure:
2878rtattr_failure:
2879 skb_trim(skb, b - skb->data);
2880 return -1;
2881}
2882
2883enum addr_type_t
2884{
2885 UNICAST_ADDR,
2886 MULTICAST_ADDR,
2887 ANYCAST_ADDR,
2888};
2889
2890static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
2891 enum addr_type_t type)
2892{
2893 int idx, ip_idx;
2894 int s_idx, s_ip_idx;
2895 int err = 1;
2896 struct net_device *dev;
2897 struct inet6_dev *idev = NULL;
2898 struct inet6_ifaddr *ifa;
2899 struct ifmcaddr6 *ifmca;
2900 struct ifacaddr6 *ifaca;
2901
2902 s_idx = cb->args[0];
2903 s_ip_idx = ip_idx = cb->args[1];
2904 read_lock(&dev_base_lock);
2905
2906 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
2907 if (idx < s_idx)
2908 continue;
2909 if (idx > s_idx)
2910 s_ip_idx = 0;
2911 ip_idx = 0;
2912 if ((idev = in6_dev_get(dev)) == NULL)
2913 continue;
2914 read_lock_bh(&idev->lock);
2915 switch (type) {
2916 case UNICAST_ADDR:
ae9cda5d 2917 /* unicast address incl. temp addr */
1da177e4
LT		 2918 for (ifa = idev->addr_list; ifa;
2919 ifa = ifa->if_next, ip_idx++) {
2920 if (ip_idx < s_ip_idx)
2921 continue;
2922 if ((err = inet6_fill_ifaddr(skb, ifa,
2923 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2924 cb->nlh->nlmsg_seq, RTM_NEWADDR,
2925 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2926 goto done;
2927 }
1da177e4
LT		 2928 break;
2929 case MULTICAST_ADDR:
2930 /* multicast address */
2931 for (ifmca = idev->mc_list; ifmca;
2932 ifmca = ifmca->next, ip_idx++) {
2933 if (ip_idx < s_ip_idx)
2934 continue;
2935 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
2936 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2937 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
2938 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2939 goto done;
2940 }
2941 break;
2942 case ANYCAST_ADDR:
2943 /* anycast address */
2944 for (ifaca = idev->ac_list; ifaca;
2945 ifaca = ifaca->aca_next, ip_idx++) {
2946 if (ip_idx < s_ip_idx)
2947 continue;
2948 if ((err = inet6_fill_ifacaddr(skb, ifaca,
2949 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 2950 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
2951 NLM_F_MULTI)) <= 0)
1da177e4
LT		 2952 goto done;
2953 }
2954 break;
2955 default:
2956 break;
2957 }
2958 read_unlock_bh(&idev->lock);
2959 in6_dev_put(idev);
2960 }
2961done:
2962 if (err <= 0) {
2963 read_unlock_bh(&idev->lock);
2964 in6_dev_put(idev);
2965 }
2966 read_unlock(&dev_base_lock);
2967 cb->args[0] = idx;
2968 cb->args[1] = ip_idx;
2969 return skb->len;
2970}
2971
2972static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
2973{
2974 enum addr_type_t type = UNICAST_ADDR;
2975 return inet6_dump_addr(skb, cb, type);
2976}
2977
2978static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
2979{
2980 enum addr_type_t type = MULTICAST_ADDR;
2981 return inet6_dump_addr(skb, cb, type);
2982}
2983
2984
2985static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
2986{
2987 enum addr_type_t type = ANYCAST_ADDR;
2988 return inet6_dump_addr(skb, cb, type);
2989}
2990
2991static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
2992{
2993 struct sk_buff *skb;
2994 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
2995
2996 skb = alloc_skb(size, GFP_ATOMIC);
2997 if (!skb) {
ac6d439d 2998 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
1da177e4
LT		 2999 return;
3000 }
9ed19f33 3001 if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
1da177e4 3002 kfree_skb(skb);
ac6d439d 3003 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
1da177e4
LT		 3004 return;
3005 }
ac6d439d
PM		 3006 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
3007 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
1da177e4
LT		 3008}
3009
3010static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3011 __s32 *array, int bytes)
3012{
3013 memset(array, 0, bytes);
3014 array[DEVCONF_FORWARDING] = cnf->forwarding;
3015 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3016 array[DEVCONF_MTU6] = cnf->mtu6;
3017 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3018 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3019 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3020 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3021 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3022 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3023 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3024 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3025#ifdef CONFIG_IPV6_PRIVACY
3026 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3027 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3028 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3029 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3030 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3031#endif
3032 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3033}
3034
3035static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3036 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 3037{
3038 struct net_device *dev = idev->dev;
3039 __s32 *array = NULL;
3040 struct ifinfomsg *r;
3041 struct nlmsghdr *nlh;
3042 unsigned char *b = skb->tail;
3043 struct rtattr *subattr;
3044 __u32 mtu = dev->mtu;
3045 struct ifla_cacheinfo ci;
3046
b6544c0b 3047 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
1da177e4
LT		 3048 r = NLMSG_DATA(nlh);
3049 r->ifi_family = AF_INET6;
9ef1d4c7 3050 r->__ifi_pad = 0;
1da177e4
LT		 3051 r->ifi_type = dev->type;
3052 r->ifi_index = dev->ifindex;
3053 r->ifi_flags = dev_get_flags(dev);
3054 r->ifi_change = 0;
3055
3056 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
3057
3058 if (dev->addr_len)
3059 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3060
3061 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
3062 if (dev->ifindex != dev->iflink)
3063 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
3064
3065 subattr = (struct rtattr*)skb->tail;
3066
3067 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
3068
3069 /* return the device flags */
3070 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
3071
3072 /* return interface cacheinfo */
3073 ci.max_reasm_len = IPV6_MAXPLEN;
3074 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3075 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3076 ci.reachable_time = idev->nd_parms->reachable_time;
3077 ci.retrans_time = idev->nd_parms->retrans_time;
3078 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3079
3080 /* return the device sysctl params */
3081 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
3082 goto rtattr_failure;
3083 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
3084 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
3085
3086 /* XXX - Statistics/MC not implemented */
3087 subattr->rta_len = skb->tail - (u8*)subattr;
3088
3089 nlh->nlmsg_len = skb->tail - b;
3090 kfree(array);
3091 return skb->len;
3092
3093nlmsg_failure:
3094rtattr_failure:
a51482bd 3095 kfree(array);
1da177e4
LT		 3096 skb_trim(skb, b - skb->data);
3097 return -1;
3098}
3099
3100static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3101{
3102 int idx, err;
3103 int s_idx = cb->args[0];
3104 struct net_device *dev;
3105 struct inet6_dev *idev;
3106
3107 read_lock(&dev_base_lock);
3108 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3109 if (idx < s_idx)
3110 continue;
3111 if ((idev = in6_dev_get(dev)) == NULL)
3112 continue;
3113 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3114 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3115 in6_dev_put(idev);
3116 if (err <= 0)
3117 break;
3118 }
3119 read_unlock(&dev_base_lock);
3120 cb->args[0] = idx;
3121
3122 return skb->len;
3123}
3124
3125void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3126{
3127 struct sk_buff *skb;
3128 /* 128 bytes ?? */
3129 int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
3130
3131 skb = alloc_skb(size, GFP_ATOMIC);
3132 if (!skb) {
ac6d439d 3133 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
1da177e4
LT		 3134 return;
3135 }
9ed19f33 3136 if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
1da177e4 3137 kfree_skb(skb);
ac6d439d 3138 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
1da177e4
LT		 3139 return;
3140 }
ac6d439d
PM		 3141 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
3142 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
1da177e4
LT		 3143}
3144
3145static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b
JHS		 3146 struct prefix_info *pinfo, u32 pid, u32 seq,
3147 int event, unsigned int flags)
1da177e4
LT		 3148{
3149 struct prefixmsg *pmsg;
3150 struct nlmsghdr *nlh;
3151 unsigned char *b = skb->tail;
3152 struct prefix_cacheinfo ci;
3153
b6544c0b 3154 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
1da177e4
LT		 3155 pmsg = NLMSG_DATA(nlh);
3156 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3157 pmsg->prefix_pad1 = 0;
3158 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3159 pmsg->prefix_ifindex = idev->dev->ifindex;
3160 pmsg->prefix_len = pinfo->prefix_len;
3161 pmsg->prefix_type = pinfo->type;
8a47077a 3162 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3163
3164 pmsg->prefix_flags = 0;
3165 if (pinfo->onlink)
3166 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3167 if (pinfo->autoconf)
3168 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3169
3170 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3171
3172 ci.preferred_time = ntohl(pinfo->prefered);
3173 ci.valid_time = ntohl(pinfo->valid);
3174 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3175
3176 nlh->nlmsg_len = skb->tail - b;
3177 return skb->len;
3178
3179nlmsg_failure:
3180rtattr_failure:
3181 skb_trim(skb, b - skb->data);
3182 return -1;
3183}
3184
3185static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3186 struct prefix_info *pinfo)
3187{
3188 struct sk_buff *skb;
3189 int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
3190
3191 skb = alloc_skb(size, GFP_ATOMIC);
3192 if (!skb) {
ac6d439d 3193 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
1da177e4
LT		 3194 return;
3195 }
9ed19f33 3196 if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
1da177e4 3197 kfree_skb(skb);
ac6d439d 3198 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
1da177e4
LT		 3199 return;
3200 }
ac6d439d
PM		 3201 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
3202 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
1da177e4
LT		 3203}
3204
db46edc6 3205static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
1da177e4
LT		 3206 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3207 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3208 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3209 [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
3210 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3211 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3212 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3213 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3214 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3215 .dumpit = inet6_dump_fib, },
3216};
3217
3218static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3219{
3220 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3221
3222 switch (event) {
3223 case RTM_NEWADDR:
3224 dst_hold(&ifp->rt->u.dst);
0d51aa80 3225 if (ip6_ins_rt(ifp->rt, NULL, NULL, NULL))
1da177e4
LT		 3226 dst_release(&ifp->rt->u.dst);
3227 if (ifp->idev->cnf.forwarding)
3228 addrconf_join_anycast(ifp);
3229 break;
3230 case RTM_DELADDR:
3231 if (ifp->idev->cnf.forwarding)
3232 addrconf_leave_anycast(ifp);
3233 addrconf_leave_solict(ifp->idev, &ifp->addr);
3234 dst_hold(&ifp->rt->u.dst);
0d51aa80 3235 if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
1da177e4
LT		 3236 dst_free(&ifp->rt->u.dst);
3237 else
3238 dst_release(&ifp->rt->u.dst);
3239 break;
3240 }
3241}
3242
3243static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3244{
3245 read_lock_bh(&addrconf_lock);
3246 if (likely(ifp->idev->dead == 0))
3247 __ipv6_ifa_notify(event, ifp);
3248 read_unlock_bh(&addrconf_lock);
3249}
3250
3251#ifdef CONFIG_SYSCTL
3252
3253static
3254int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3255 void __user *buffer, size_t *lenp, loff_t *ppos)
3256{
3257 int *valp = ctl->data;
3258 int val = *valp;
3259 int ret;
3260
3261 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3262
3263 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3264 if (valp != &ipv6_devconf.forwarding) {
3265 if ((!*valp) ^ (!val)) {
3266 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3267 if (idev == NULL)
3268 return ret;
3269 dev_forward_change(idev);
3270 }
3271 } else {
3272 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3273 addrconf_forward_change();
3274 }
3275 if (*valp)
3276 rt6_purge_dflt_routers();
3277 }
3278
3279 return ret;
3280}
3281
3282static int addrconf_sysctl_forward_strategy(ctl_table *table,
3283 int __user *name, int nlen,
3284 void __user *oldval,
3285 size_t __user *oldlenp,
3286 void __user *newval, size_t newlen,
3287 void **context)
3288{
3289 int *valp = table->data;
3290 int new;
3291
3292 if (!newval || !newlen)
3293 return 0;
3294 if (newlen != sizeof(int))
3295 return -EINVAL;
3296 if (get_user(new, (int __user *)newval))
3297 return -EFAULT;
3298 if (new == *valp)
3299 return 0;
3300 if (oldval && oldlenp) {
3301 size_t len;
3302 if (get_user(len, oldlenp))
3303 return -EFAULT;
3304 if (len) {
3305 if (len > table->maxlen)
3306 len = table->maxlen;
3307 if (copy_to_user(oldval, valp, len))
3308 return -EFAULT;
3309 if (put_user(len, oldlenp))
3310 return -EFAULT;
3311 }
3312 }
3313
3314 if (valp != &ipv6_devconf_dflt.forwarding) {
3315 if (valp != &ipv6_devconf.forwarding) {
3316 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3317 int changed;
3318 if (unlikely(idev == NULL))
3319 return -ENODEV;
3320 changed = (!*valp) ^ (!new);
3321 *valp = new;
3322 if (changed)
3323 dev_forward_change(idev);
3324 } else {
3325 *valp = new;
3326 addrconf_forward_change();
3327 }
3328
3329 if (*valp)
3330 rt6_purge_dflt_routers();
3331 } else
3332 *valp = new;
3333
3334 return 1;
3335}
3336
3337static struct addrconf_sysctl_table
3338{
3339 struct ctl_table_header *sysctl_header;
3340 ctl_table addrconf_vars[__NET_IPV6_MAX];
3341 ctl_table addrconf_dev[2];
3342 ctl_table addrconf_conf_dir[2];
3343 ctl_table addrconf_proto_dir[2];
3344 ctl_table addrconf_root_dir[2];
3345} addrconf_sysctl = {
3346 .sysctl_header = NULL,
3347 .addrconf_vars = {
3348 {
3349 .ctl_name = NET_IPV6_FORWARDING,
3350 .procname = "forwarding",
3351 .data = &ipv6_devconf.forwarding,
3352 .maxlen = sizeof(int),
3353 .mode = 0644,
3354 .proc_handler = &addrconf_sysctl_forward,
3355 .strategy = &addrconf_sysctl_forward_strategy,
3356 },
3357 {
3358 .ctl_name = NET_IPV6_HOP_LIMIT,
3359 .procname = "hop_limit",
3360 .data = &ipv6_devconf.hop_limit,
3361 .maxlen = sizeof(int),
3362 .mode = 0644,
3363 .proc_handler = proc_dointvec,
3364 },
3365 {
3366 .ctl_name = NET_IPV6_MTU,
3367 .procname = "mtu",
3368 .data = &ipv6_devconf.mtu6,
3369 .maxlen = sizeof(int),
3370 .mode = 0644,
3371 .proc_handler = &proc_dointvec,
3372 },
3373 {
3374 .ctl_name = NET_IPV6_ACCEPT_RA,
3375 .procname = "accept_ra",
3376 .data = &ipv6_devconf.accept_ra,
3377 .maxlen = sizeof(int),
3378 .mode = 0644,
3379 .proc_handler = &proc_dointvec,
3380 },
3381 {
3382 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3383 .procname = "accept_redirects",
3384 .data = &ipv6_devconf.accept_redirects,
3385 .maxlen = sizeof(int),
3386 .mode = 0644,
3387 .proc_handler = &proc_dointvec,
3388 },
3389 {
3390 .ctl_name = NET_IPV6_AUTOCONF,
3391 .procname = "autoconf",
3392 .data = &ipv6_devconf.autoconf,
3393 .maxlen = sizeof(int),
3394 .mode = 0644,
3395 .proc_handler = &proc_dointvec,
3396 },
3397 {
3398 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3399 .procname = "dad_transmits",
3400 .data = &ipv6_devconf.dad_transmits,
3401 .maxlen = sizeof(int),
3402 .mode = 0644,
3403 .proc_handler = &proc_dointvec,
3404 },
3405 {
3406 .ctl_name = NET_IPV6_RTR_SOLICITS,
3407 .procname = "router_solicitations",
3408 .data = &ipv6_devconf.rtr_solicits,
3409 .maxlen = sizeof(int),
3410 .mode = 0644,
3411 .proc_handler = &proc_dointvec,
3412 },
3413 {
3414 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3415 .procname = "router_solicitation_interval",
3416 .data = &ipv6_devconf.rtr_solicit_interval,
3417 .maxlen = sizeof(int),
3418 .mode = 0644,
3419 .proc_handler = &proc_dointvec_jiffies,
3420 .strategy = &sysctl_jiffies,
3421 },
3422 {
3423 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3424 .procname = "router_solicitation_delay",
3425 .data = &ipv6_devconf.rtr_solicit_delay,
3426 .maxlen = sizeof(int),
3427 .mode = 0644,
3428 .proc_handler = &proc_dointvec_jiffies,
3429 .strategy = &sysctl_jiffies,
3430 },
3431 {
3432 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3433 .procname = "force_mld_version",
3434 .data = &ipv6_devconf.force_mld_version,
3435 .maxlen = sizeof(int),
3436 .mode = 0644,
3437 .proc_handler = &proc_dointvec,
3438 },
3439#ifdef CONFIG_IPV6_PRIVACY
3440 {
3441 .ctl_name = NET_IPV6_USE_TEMPADDR,
3442 .procname = "use_tempaddr",
3443 .data = &ipv6_devconf.use_tempaddr,
3444 .maxlen = sizeof(int),
3445 .mode = 0644,
3446 .proc_handler = &proc_dointvec,
3447 },
3448 {
3449 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3450 .procname = "temp_valid_lft",
3451 .data = &ipv6_devconf.temp_valid_lft,
3452 .maxlen = sizeof(int),
3453 .mode = 0644,
3454 .proc_handler = &proc_dointvec,
3455 },
3456 {
3457 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3458 .procname = "temp_prefered_lft",
3459 .data = &ipv6_devconf.temp_prefered_lft,
3460 .maxlen = sizeof(int),
3461 .mode = 0644,
3462 .proc_handler = &proc_dointvec,
3463 },
3464 {
3465 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3466 .procname = "regen_max_retry",
3467 .data = &ipv6_devconf.regen_max_retry,
3468 .maxlen = sizeof(int),
3469 .mode = 0644,
3470 .proc_handler = &proc_dointvec,
3471 },
3472 {
3473 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3474 .procname = "max_desync_factor",
3475 .data = &ipv6_devconf.max_desync_factor,
3476 .maxlen = sizeof(int),
3477 .mode = 0644,
3478 .proc_handler = &proc_dointvec,
3479 },
3480#endif
3481 {
3482 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3483 .procname = "max_addresses",
3484 .data = &ipv6_devconf.max_addresses,
3485 .maxlen = sizeof(int),
3486 .mode = 0644,
3487 .proc_handler = &proc_dointvec,
3488 },
3489 {
3490 .ctl_name = 0, /* sentinel */
3491 }
3492 },
3493 .addrconf_dev = {
3494 {
3495 .ctl_name = NET_PROTO_CONF_ALL,
3496 .procname = "all",
3497 .mode = 0555,
3498 .child = addrconf_sysctl.addrconf_vars,
3499 },
3500 {
3501 .ctl_name = 0, /* sentinel */
3502 }
3503 },
3504 .addrconf_conf_dir = {
3505 {
3506 .ctl_name = NET_IPV6_CONF,
3507 .procname = "conf",
3508 .mode = 0555,
3509 .child = addrconf_sysctl.addrconf_dev,
3510 },
3511 {
3512 .ctl_name = 0, /* sentinel */
3513 }
3514 },
3515 .addrconf_proto_dir = {
3516 {
3517 .ctl_name = NET_IPV6,
3518 .procname = "ipv6",
3519 .mode = 0555,
3520 .child = addrconf_sysctl.addrconf_conf_dir,
3521 },
3522 {
3523 .ctl_name = 0, /* sentinel */
3524 }
3525 },
3526 .addrconf_root_dir = {
3527 {
3528 .ctl_name = CTL_NET,
3529 .procname = "net",
3530 .mode = 0555,
3531 .child = addrconf_sysctl.addrconf_proto_dir,
3532 },
3533 {
3534 .ctl_name = 0, /* sentinel */
3535 }
3536 },
3537};
3538
3539static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3540{
3541 int i;
3542 struct net_device *dev = idev ? idev->dev : NULL;
3543 struct addrconf_sysctl_table *t;
3544 char *dev_name = NULL;
3545
3546 t = kmalloc(sizeof(*t), GFP_KERNEL);
3547 if (t == NULL)
3548 return;
3549 memcpy(t, &addrconf_sysctl, sizeof(*t));
3550 for (i=0; t->addrconf_vars[i].data; i++) {
3551 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3552 t->addrconf_vars[i].de = NULL;
3553 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3554 }
3555 if (dev) {
3556 dev_name = dev->name;
3557 t->addrconf_dev[0].ctl_name = dev->ifindex;
3558 } else {
3559 dev_name = "default";
3560 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3561 }
3562
3563 /*
3564 * Make a copy of dev_name, because '.procname' is regarded as const
3565 * by sysctl and we wouldn't want anyone to change it under our feet
3566 * (see SIOCSIFNAME).
3567 */
543537bd 3568 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 3569 if (!dev_name)
3570 goto free;
3571
3572 t->addrconf_dev[0].procname = dev_name;
3573
3574 t->addrconf_dev[0].child = t->addrconf_vars;
3575 t->addrconf_dev[0].de = NULL;
3576 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3577 t->addrconf_conf_dir[0].de = NULL;
3578 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3579 t->addrconf_proto_dir[0].de = NULL;
3580 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3581 t->addrconf_root_dir[0].de = NULL;
3582
3583 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3584 if (t->sysctl_header == NULL)
3585 goto free_procname;
3586 else
3587 p->sysctl = t;
3588 return;
3589
3590 /* error path */
3591 free_procname:
3592 kfree(dev_name);
3593 free:
3594 kfree(t);
3595
3596 return;
3597}
3598
3599static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3600{
3601 if (p->sysctl) {
3602 struct addrconf_sysctl_table *t = p->sysctl;
3603 p->sysctl = NULL;
3604 unregister_sysctl_table(t->sysctl_header);
3605 kfree(t->addrconf_dev[0].procname);
3606 kfree(t);
3607 }
3608}
3609
3610
3611#endif
3612
3613/*
3614 * Device notifier
3615 */
3616
3617int register_inet6addr_notifier(struct notifier_block *nb)
3618{
3619 return notifier_chain_register(&inet6addr_chain, nb);
3620}
3621
3622int unregister_inet6addr_notifier(struct notifier_block *nb)
3623{
3624 return notifier_chain_unregister(&inet6addr_chain,nb);
3625}
3626
3627/*
3628 * Init / cleanup code
3629 */
3630
3631int __init addrconf_init(void)
3632{
3633 int err = 0;
3634
3635 /* The addrconf netdev notifier requires that loopback_dev
3636 * has it's ipv6 private information allocated and setup
3637 * before it can bring up and give link-local addresses
3638 * to other devices which are up.
3639 *
3640 * Unfortunately, loopback_dev is not necessarily the first
3641 * entry in the global dev_base list of net devices. In fact,
3642 * it is likely to be the very last entry on that list.
3643 * So this causes the notifier registry below to try and
3644 * give link-local addresses to all devices besides loopback_dev
3645 * first, then loopback_dev, which cases all the non-loopback_dev
3646 * devices to fail to get a link-local address.
3647 *
3648 * So, as a temporary fix, allocate the ipv6 structure for
3649 * loopback_dev first by hand.
3650 * Longer term, all of the dependencies ipv6 has upon the loopback
3651 * device and it being up should be removed.
3652 */
3653 rtnl_lock();
3654 if (!ipv6_add_dev(&loopback_dev))
3655 err = -ENOMEM;
3656 rtnl_unlock();
3657 if (err)
3658 return err;
3659
c62dba90
HX		 3660 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
3661
1da177e4
LT		 3662 register_netdevice_notifier(&ipv6_dev_notf);
3663
3664#ifdef CONFIG_IPV6_PRIVACY
3665 md5_tfm = crypto_alloc_tfm("md5", 0);
3666 if (unlikely(md5_tfm == NULL))
3667 printk(KERN_WARNING
3668 "failed to load transform for md5\n");
3669#endif
3670
3671 addrconf_verify(0);
3672 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3673#ifdef CONFIG_SYSCTL
3674 addrconf_sysctl.sysctl_header =
3675 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
3676 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
3677#endif
3678
3679 return 0;
3680}
3681
3682void __exit addrconf_cleanup(void)
3683{
3684 struct net_device *dev;
3685 struct inet6_dev *idev;
3686 struct inet6_ifaddr *ifa;
3687 int i;
3688
3689 unregister_netdevice_notifier(&ipv6_dev_notf);
3690
3691 rtnetlink_links[PF_INET6] = NULL;
3692#ifdef CONFIG_SYSCTL
3693 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
3694 addrconf_sysctl_unregister(&ipv6_devconf);
3695#endif
3696
3697 rtnl_lock();
3698
3699 /*
3700 * clean dev list.
3701 */
3702
3703 for (dev=dev_base; dev; dev=dev->next) {
3704 if ((idev = __in6_dev_get(dev)) == NULL)
3705 continue;
3706 addrconf_ifdown(dev, 1);
3707 }
3708 addrconf_ifdown(&loopback_dev, 2);
3709
3710 /*
3711 * Check hash table.
3712 */
3713
3714 write_lock_bh(&addrconf_hash_lock);
3715 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3716 for (ifa=inet6_addr_lst[i]; ifa; ) {
3717 struct inet6_ifaddr *bifa;
3718
3719 bifa = ifa;
3720 ifa = ifa->lst_next;
3721 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
3722 /* Do not free it; something is wrong.
3723 Now we can investigate it with debugger.
3724 */
3725 }
3726 }
3727 write_unlock_bh(&addrconf_hash_lock);
3728
3729 del_timer(&addr_chk_timer);
3730
3731 rtnl_unlock();
3732
3733#ifdef CONFIG_IPV6_PRIVACY
573dbd95
JJ		 3734 crypto_free_tfm(md5_tfm);
3735 md5_tfm = NULL;
1da177e4
LT		 3736#endif
3737
3738#ifdef CONFIG_PROC_FS
3739 proc_net_remove("if_inet6");
3740#endif
3741}
kernel source for telekom puls (alcatel/mediatek)