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[net-next-2.6.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
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
4fc268d2 61#include <linux/capability.h>
1da177e4
LT		 62#include <linux/delay.h>
63#include <linux/notifier.h>
543537bd 64#include <linux/string.h>
1da177e4
LT		 65
66#include <net/sock.h>
67#include <net/snmp.h>
68
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
76#include <linux/if_tunnel.h>
77#include <linux/rtnetlink.h>
78
79#ifdef CONFIG_IPV6_PRIVACY
80#include <linux/random.h>
1da177e4
LT		 81#endif
82
83#include <asm/uaccess.h>
84
85#include <linux/proc_fs.h>
86#include <linux/seq_file.h>
87
88/* Set to 3 to get tracing... */
89#define ACONF_DEBUG 2
90
91#if ACONF_DEBUG >= 3
92#define ADBG(x) printk x
93#else
94#define ADBG(x)
95#endif
96
97#define INFINITY_LIFE_TIME 0xFFFFFFFF
98#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
99
100#ifdef CONFIG_SYSCTL
101static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
102static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
103#endif
104
105#ifdef CONFIG_IPV6_PRIVACY
106static int __ipv6_regen_rndid(struct inet6_dev *idev);
107static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
108static void ipv6_regen_rndid(unsigned long data);
109
110static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 111#endif
112
113static int ipv6_count_addresses(struct inet6_dev *idev);
114
115/*
116 * Configured unicast address hash table
117 */
118static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
119static DEFINE_RWLOCK(addrconf_hash_lock);
120
121/* Protects inet6 devices */
122DEFINE_RWLOCK(addrconf_lock);
123
124static void addrconf_verify(unsigned long);
125
8d06afab 126static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 127static DEFINE_SPINLOCK(addrconf_verify_lock);
128
129static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
130static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
131
132static int addrconf_ifdown(struct net_device *dev, int how);
133
e431b8c0 134static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 135static void addrconf_dad_timer(unsigned long data);
136static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 137static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 138static void addrconf_rs_timer(unsigned long data);
139static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
140static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
141
142static void inet6_prefix_notify(int event, struct inet6_dev *idev,
143 struct prefix_info *pinfo);
144static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
145
146static struct notifier_block *inet6addr_chain;
147
148struct ipv6_devconf ipv6_devconf = {
149 .forwarding = 0,
150 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
151 .mtu6 = IPV6_MIN_MTU,
152 .accept_ra = 1,
153 .accept_redirects = 1,
154 .autoconf = 1,
155 .force_mld_version = 0,
156 .dad_transmits = 1,
157 .rtr_solicits = MAX_RTR_SOLICITATIONS,
158 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
159 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
160#ifdef CONFIG_IPV6_PRIVACY
161 .use_tempaddr = 0,
162 .temp_valid_lft = TEMP_VALID_LIFETIME,
163 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
164 .regen_max_retry = REGEN_MAX_RETRY,
165 .max_desync_factor = MAX_DESYNC_FACTOR,
166#endif
167 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 168 .accept_ra_defrtr = 1,
c4fd30eb 169 .accept_ra_pinfo = 1,
930d6ff2
YH		 170#ifdef CONFIG_IPV6_ROUTER_PREF
171 .accept_ra_rtr_pref = 1,
52e16356 172 .rtr_probe_interval = 60 * HZ,
930d6ff2 173#endif
1da177e4
LT		 174};
175
176static struct ipv6_devconf ipv6_devconf_dflt = {
177 .forwarding = 0,
178 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
179 .mtu6 = IPV6_MIN_MTU,
180 .accept_ra = 1,
181 .accept_redirects = 1,
182 .autoconf = 1,
183 .dad_transmits = 1,
184 .rtr_solicits = MAX_RTR_SOLICITATIONS,
185 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
186 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
187#ifdef CONFIG_IPV6_PRIVACY
188 .use_tempaddr = 0,
189 .temp_valid_lft = TEMP_VALID_LIFETIME,
190 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
191 .regen_max_retry = REGEN_MAX_RETRY,
192 .max_desync_factor = MAX_DESYNC_FACTOR,
193#endif
194 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 195 .accept_ra_defrtr = 1,
c4fd30eb 196 .accept_ra_pinfo = 1,
930d6ff2
YH		 197#ifdef CONFIG_IPV6_ROUTER_PREF
198 .accept_ra_rtr_pref = 1,
52e16356 199 .rtr_probe_interval = 60 * HZ,
930d6ff2 200#endif
1da177e4
LT		 201};
202
203/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
204#if 0
205const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
206#endif
207const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
208
b1cacb68
YH		 209#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
210
211static inline unsigned ipv6_addr_scope2type(unsigned scope)
212{
213 switch(scope) {
214 case IPV6_ADDR_SCOPE_NODELOCAL:
215 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
216 IPV6_ADDR_LOOPBACK);
217 case IPV6_ADDR_SCOPE_LINKLOCAL:
218 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
219 IPV6_ADDR_LINKLOCAL);
220 case IPV6_ADDR_SCOPE_SITELOCAL:
221 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
222 IPV6_ADDR_SITELOCAL);
223 }
224 return IPV6_ADDR_SCOPE_TYPE(scope);
225}
226
227int __ipv6_addr_type(const struct in6_addr *addr)
1da177e4 228{
1da177e4
LT		 229 u32 st;
230
231 st = addr->s6_addr32[0];
232
1da177e4 233 /* Consider all addresses with the first three bits different of
b1cacb68 234 000 and 111 as unicasts.
1da177e4
LT		 235 */
236 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
237 (st & htonl(0xE0000000)) != htonl(0xE0000000))
b1cacb68
YH		 238 return (IPV6_ADDR_UNICAST |
239 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
1da177e4 240
b1cacb68
YH		 241 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
242 /* multicast */
243 /* addr-select 3.1 */
244 return (IPV6_ADDR_MULTICAST |
245 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
246 }
247
248 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
249 return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
250 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
1da177e4 251 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
b1cacb68
YH		 252 return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
253 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
1da177e4
LT		 254
255 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
256 if (addr->s6_addr32[2] == 0) {
257 if (addr->s6_addr32[3] == 0)
258 return IPV6_ADDR_ANY;
259
260 if (addr->s6_addr32[3] == htonl(0x00000001))
b1cacb68
YH		 261 return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
262 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
1da177e4 263
b1cacb68
YH		 264 return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
265 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 266 }
267
268 if (addr->s6_addr32[2] == htonl(0x0000ffff))
b1cacb68
YH		 269 return (IPV6_ADDR_MAPPED |
270 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 271 }
272
b1cacb68
YH		 273 return (IPV6_ADDR_RESERVED |
274 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
1da177e4
LT		 275}
276
277static void addrconf_del_timer(struct inet6_ifaddr *ifp)
278{
279 if (del_timer(&ifp->timer))
280 __in6_ifa_put(ifp);
281}
282
283enum addrconf_timer_t
284{
285 AC_NONE,
286 AC_DAD,
287 AC_RS,
288};
289
290static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
291 enum addrconf_timer_t what,
292 unsigned long when)
293{
294 if (!del_timer(&ifp->timer))
295 in6_ifa_hold(ifp);
296
297 switch (what) {
298 case AC_DAD:
299 ifp->timer.function = addrconf_dad_timer;
300 break;
301 case AC_RS:
302 ifp->timer.function = addrconf_rs_timer;
303 break;
304 default:;
305 }
306 ifp->timer.expires = jiffies + when;
307 add_timer(&ifp->timer);
308}
309
310/* Nobody refers to this device, we may destroy it. */
311
312void in6_dev_finish_destroy(struct inet6_dev *idev)
313{
314 struct net_device *dev = idev->dev;
315 BUG_TRAP(idev->addr_list==NULL);
316 BUG_TRAP(idev->mc_list==NULL);
317#ifdef NET_REFCNT_DEBUG
318 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
319#endif
320 dev_put(dev);
321 if (!idev->dead) {
322 printk("Freeing alive inet6 device %p\n", idev);
323 return;
324 }
325 snmp6_free_dev(idev);
326 kfree(idev);
327}
328
329static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
330{
331 struct inet6_dev *ndev;
332
333 ASSERT_RTNL();
334
335 if (dev->mtu < IPV6_MIN_MTU)
336 return NULL;
337
338 ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
339
340 if (ndev) {
341 memset(ndev, 0, sizeof(struct inet6_dev));
342
343 rwlock_init(&ndev->lock);
344 ndev->dev = dev;
345 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
346 ndev->cnf.mtu6 = dev->mtu;
347 ndev->cnf.sysctl = NULL;
348 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
349 if (ndev->nd_parms == NULL) {
350 kfree(ndev);
351 return NULL;
352 }
353 /* We refer to the device */
354 dev_hold(dev);
355
356 if (snmp6_alloc_dev(ndev) < 0) {
357 ADBG((KERN_WARNING
358 "%s(): cannot allocate memory for statistics; dev=%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 if (snmp6_register_dev(ndev) < 0) {
367 ADBG((KERN_WARNING
368 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
369 __FUNCTION__, dev->name));
370 neigh_parms_release(&nd_tbl, ndev->nd_parms);
371 ndev->dead = 1;
372 in6_dev_finish_destroy(ndev);
373 return NULL;
374 }
375
376 /* One reference from device. We must do this before
377 * we invoke __ipv6_regen_rndid().
378 */
379 in6_dev_hold(ndev);
380
381#ifdef CONFIG_IPV6_PRIVACY
1da177e4
LT		 382 init_timer(&ndev->regen_timer);
383 ndev->regen_timer.function = ipv6_regen_rndid;
384 ndev->regen_timer.data = (unsigned long) ndev;
385 if ((dev->flags&IFF_LOOPBACK) ||
386 dev->type == ARPHRD_TUNNEL ||
77bd9196 387 dev->type == ARPHRD_NONE ||
1da177e4
LT		 388 dev->type == ARPHRD_SIT) {
389 printk(KERN_INFO
a1493d9c
DM		 390 "%s: Disabled Privacy Extensions\n",
391 dev->name);
1da177e4
LT		 392 ndev->cnf.use_tempaddr = -1;
393 } else {
394 in6_dev_hold(ndev);
395 ipv6_regen_rndid((unsigned long) ndev);
396 }
397#endif
398
3c21edbd
YH		 399 if (netif_carrier_ok(dev))
400 ndev->if_flags |= IF_READY;
401
1da177e4
LT		 402 write_lock_bh(&addrconf_lock);
403 dev->ip6_ptr = ndev;
404 write_unlock_bh(&addrconf_lock);
405
406 ipv6_mc_init_dev(ndev);
407 ndev->tstamp = jiffies;
408#ifdef CONFIG_SYSCTL
409 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
410 NET_IPV6_NEIGH, "ipv6",
411 &ndisc_ifinfo_sysctl_change,
412 NULL);
413 addrconf_sysctl_register(ndev, &ndev->cnf);
414#endif
415 }
416 return ndev;
417}
418
419static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
420{
421 struct inet6_dev *idev;
422
423 ASSERT_RTNL();
424
425 if ((idev = __in6_dev_get(dev)) == NULL) {
426 if ((idev = ipv6_add_dev(dev)) == NULL)
427 return NULL;
428 }
c5e33bdd 429
1da177e4
LT		 430 if (dev->flags&IFF_UP)
431 ipv6_mc_up(idev);
432 return idev;
433}
434
435#ifdef CONFIG_SYSCTL
436static void dev_forward_change(struct inet6_dev *idev)
437{
438 struct net_device *dev;
439 struct inet6_ifaddr *ifa;
440 struct in6_addr addr;
441
442 if (!idev)
443 return;
444 dev = idev->dev;
445 if (dev && (dev->flags & IFF_MULTICAST)) {
446 ipv6_addr_all_routers(&addr);
447
448 if (idev->cnf.forwarding)
449 ipv6_dev_mc_inc(dev, &addr);
450 else
451 ipv6_dev_mc_dec(dev, &addr);
452 }
453 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
454 if (idev->cnf.forwarding)
455 addrconf_join_anycast(ifa);
456 else
457 addrconf_leave_anycast(ifa);
458 }
459}
460
461
462static void addrconf_forward_change(void)
463{
464 struct net_device *dev;
465 struct inet6_dev *idev;
466
467 read_lock(&dev_base_lock);
468 for (dev=dev_base; dev; dev=dev->next) {
469 read_lock(&addrconf_lock);
470 idev = __in6_dev_get(dev);
471 if (idev) {
472 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
473 idev->cnf.forwarding = ipv6_devconf.forwarding;
474 if (changed)
475 dev_forward_change(idev);
476 }
477 read_unlock(&addrconf_lock);
478 }
479 read_unlock(&dev_base_lock);
480}
481#endif
482
483/* Nobody refers to this ifaddr, destroy it */
484
485void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
486{
487 BUG_TRAP(ifp->if_next==NULL);
488 BUG_TRAP(ifp->lst_next==NULL);
489#ifdef NET_REFCNT_DEBUG
490 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
491#endif
492
493 in6_dev_put(ifp->idev);
494
495 if (del_timer(&ifp->timer))
496 printk("Timer is still running, when freeing ifa=%p\n", ifp);
497
498 if (!ifp->dead) {
499 printk("Freeing alive inet6 address %p\n", ifp);
500 return;
501 }
502 dst_release(&ifp->rt->u.dst);
503
504 kfree(ifp);
505}
506
507/* On success it returns ifp with increased reference count */
508
509static struct inet6_ifaddr *
510ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 511 int scope, u32 flags)
1da177e4
LT		 512{
513 struct inet6_ifaddr *ifa = NULL;
514 struct rt6_info *rt;
515 int hash;
516 int err = 0;
517
518 read_lock_bh(&addrconf_lock);
519 if (idev->dead) {
520 err = -ENODEV; /*XXX*/
521 goto out2;
522 }
523
524 write_lock(&addrconf_hash_lock);
525
526 /* Ignore adding duplicate addresses on an interface */
527 if (ipv6_chk_same_addr(addr, idev->dev)) {
528 ADBG(("ipv6_add_addr: already assigned\n"));
529 err = -EEXIST;
530 goto out;
531 }
532
533 ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
534
535 if (ifa == NULL) {
536 ADBG(("ipv6_add_addr: malloc failed\n"));
537 err = -ENOBUFS;
538 goto out;
539 }
540
541 rt = addrconf_dst_alloc(idev, addr, 0);
542 if (IS_ERR(rt)) {
543 err = PTR_ERR(rt);
544 goto out;
545 }
546
547 memset(ifa, 0, sizeof(struct inet6_ifaddr));
548 ipv6_addr_copy(&ifa->addr, addr);
549
550 spin_lock_init(&ifa->lock);
551 init_timer(&ifa->timer);
552 ifa->timer.data = (unsigned long) ifa;
553 ifa->scope = scope;
554 ifa->prefix_len = pfxlen;
555 ifa->flags = flags | IFA_F_TENTATIVE;
556 ifa->cstamp = ifa->tstamp = jiffies;
557
558 ifa->idev = idev;
559 in6_dev_hold(idev);
560 /* For caller */
561 in6_ifa_hold(ifa);
562
563 /* Add to big hash table */
564 hash = ipv6_addr_hash(addr);
565
566 ifa->lst_next = inet6_addr_lst[hash];
567 inet6_addr_lst[hash] = ifa;
568 in6_ifa_hold(ifa);
569 write_unlock(&addrconf_hash_lock);
570
571 write_lock(&idev->lock);
572 /* Add to inet6_dev unicast addr list. */
573 ifa->if_next = idev->addr_list;
574 idev->addr_list = ifa;
575
576#ifdef CONFIG_IPV6_PRIVACY
577 if (ifa->flags&IFA_F_TEMPORARY) {
578 ifa->tmp_next = idev->tempaddr_list;
579 idev->tempaddr_list = ifa;
580 in6_ifa_hold(ifa);
581 }
582#endif
583
584 ifa->rt = rt;
585
586 in6_ifa_hold(ifa);
587 write_unlock(&idev->lock);
588out2:
589 read_unlock_bh(&addrconf_lock);
590
fd92833a 591 if (likely(err == 0))
1da177e4
LT		 592 notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
593 else {
594 kfree(ifa);
595 ifa = ERR_PTR(err);
596 }
597
598 return ifa;
599out:
600 write_unlock(&addrconf_hash_lock);
601 goto out2;
602}
603
604/* This function wants to get referenced ifp and releases it before return */
605
606static void ipv6_del_addr(struct inet6_ifaddr *ifp)
607{
608 struct inet6_ifaddr *ifa, **ifap;
609 struct inet6_dev *idev = ifp->idev;
610 int hash;
611 int deleted = 0, onlink = 0;
612 unsigned long expires = jiffies;
613
614 hash = ipv6_addr_hash(&ifp->addr);
615
616 ifp->dead = 1;
617
618 write_lock_bh(&addrconf_hash_lock);
619 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
620 ifap = &ifa->lst_next) {
621 if (ifa == ifp) {
622 *ifap = ifa->lst_next;
623 __in6_ifa_put(ifp);
624 ifa->lst_next = NULL;
625 break;
626 }
627 }
628 write_unlock_bh(&addrconf_hash_lock);
629
630 write_lock_bh(&idev->lock);
631#ifdef CONFIG_IPV6_PRIVACY
632 if (ifp->flags&IFA_F_TEMPORARY) {
633 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
634 ifap = &ifa->tmp_next) {
635 if (ifa == ifp) {
636 *ifap = ifa->tmp_next;
637 if (ifp->ifpub) {
638 in6_ifa_put(ifp->ifpub);
639 ifp->ifpub = NULL;
640 }
641 __in6_ifa_put(ifp);
642 ifa->tmp_next = NULL;
643 break;
644 }
645 }
646 }
647#endif
648
1d142804 649 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 650 if (ifa == ifp) {
651 *ifap = ifa->if_next;
652 __in6_ifa_put(ifp);
653 ifa->if_next = NULL;
654 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
655 break;
656 deleted = 1;
1d142804 657 continue;
1da177e4
LT		 658 } else if (ifp->flags & IFA_F_PERMANENT) {
659 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
660 ifp->prefix_len)) {
661 if (ifa->flags & IFA_F_PERMANENT) {
662 onlink = 1;
663 if (deleted)
664 break;
665 } else {
666 unsigned long lifetime;
667
668 if (!onlink)
669 onlink = -1;
670
671 spin_lock(&ifa->lock);
672 lifetime = min_t(unsigned long,
673 ifa->valid_lft, 0x7fffffffUL/HZ);
674 if (time_before(expires,
675 ifa->tstamp + lifetime * HZ))
676 expires = ifa->tstamp + lifetime * HZ;
677 spin_unlock(&ifa->lock);
678 }
679 }
680 }
1d142804 681 ifap = &ifa->if_next;
1da177e4
LT		 682 }
683 write_unlock_bh(&idev->lock);
684
685 ipv6_ifa_notify(RTM_DELADDR, ifp);
686
687 notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
688
689 addrconf_del_timer(ifp);
690
691 /*
692 * Purge or update corresponding prefix
693 *
694 * 1) we don't purge prefix here if address was not permanent.
695 * prefix is managed by its own lifetime.
696 * 2) if there're no addresses, delete prefix.
697 * 3) if there're still other permanent address(es),
698 * corresponding prefix is still permanent.
699 * 4) otherwise, update prefix lifetime to the
700 * longest valid lifetime among the corresponding
701 * addresses on the device.
702 * Note: subsequent RA will update lifetime.
703 *
704 * --yoshfuji
705 */
706 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
707 struct in6_addr prefix;
708 struct rt6_info *rt;
709
710 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
711 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
712
713 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
714 if (onlink == 0) {
0d51aa80 715 ip6_del_rt(rt, NULL, NULL, NULL);
1da177e4
LT		 716 rt = NULL;
717 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
718 rt->rt6i_expires = expires;
719 rt->rt6i_flags |= RTF_EXPIRES;
720 }
721 }
722 dst_release(&rt->u.dst);
723 }
724
725 in6_ifa_put(ifp);
726}
727
728#ifdef CONFIG_IPV6_PRIVACY
729static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
730{
731 struct inet6_dev *idev = ifp->idev;
732 struct in6_addr addr, *tmpaddr;
733 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
734 int tmp_plen;
735 int ret = 0;
736 int max_addresses;
737
738 write_lock(&idev->lock);
739 if (ift) {
740 spin_lock_bh(&ift->lock);
741 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
742 spin_unlock_bh(&ift->lock);
743 tmpaddr = &addr;
744 } else {
745 tmpaddr = NULL;
746 }
747retry:
748 in6_dev_hold(idev);
749 if (idev->cnf.use_tempaddr <= 0) {
750 write_unlock(&idev->lock);
751 printk(KERN_INFO
752 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
753 in6_dev_put(idev);
754 ret = -1;
755 goto out;
756 }
757 spin_lock_bh(&ifp->lock);
758 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
759 idev->cnf.use_tempaddr = -1; /*XXX*/
760 spin_unlock_bh(&ifp->lock);
761 write_unlock(&idev->lock);
762 printk(KERN_WARNING
763 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
764 in6_dev_put(idev);
765 ret = -1;
766 goto out;
767 }
768 in6_ifa_hold(ifp);
769 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
770 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
771 spin_unlock_bh(&ifp->lock);
772 write_unlock(&idev->lock);
773 printk(KERN_WARNING
774 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
775 in6_ifa_put(ifp);
776 in6_dev_put(idev);
777 ret = -1;
778 goto out;
779 }
780 memcpy(&addr.s6_addr[8], idev->rndid, 8);
781 tmp_valid_lft = min_t(__u32,
782 ifp->valid_lft,
783 idev->cnf.temp_valid_lft);
784 tmp_prefered_lft = min_t(__u32,
785 ifp->prefered_lft,
786 idev->cnf.temp_prefered_lft - desync_factor / HZ);
787 tmp_plen = ifp->prefix_len;
788 max_addresses = idev->cnf.max_addresses;
789 tmp_cstamp = ifp->cstamp;
790 tmp_tstamp = ifp->tstamp;
791 spin_unlock_bh(&ifp->lock);
792
793 write_unlock(&idev->lock);
794 ift = !max_addresses ||
795 ipv6_count_addresses(idev) < max_addresses ?
796 ipv6_add_addr(idev, &addr, tmp_plen,
797 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
798 if (!ift || IS_ERR(ift)) {
799 in6_ifa_put(ifp);
800 in6_dev_put(idev);
801 printk(KERN_INFO
802 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
803 tmpaddr = &addr;
804 write_lock(&idev->lock);
805 goto retry;
806 }
807
808 spin_lock_bh(&ift->lock);
809 ift->ifpub = ifp;
810 ift->valid_lft = tmp_valid_lft;
811 ift->prefered_lft = tmp_prefered_lft;
812 ift->cstamp = tmp_cstamp;
813 ift->tstamp = tmp_tstamp;
814 spin_unlock_bh(&ift->lock);
815
816 addrconf_dad_start(ift, 0);
817 in6_ifa_put(ift);
818 in6_dev_put(idev);
819out:
820 return ret;
821}
822#endif
823
824/*
072047e4 825 * Choose an appropriate source address (RFC3484)
1da177e4 826 */
072047e4
YH		 827struct ipv6_saddr_score {
828 int addr_type;
829 unsigned int attrs;
830 int matchlen;
0d27b427 831 int scope;
072047e4
YH		 832 unsigned int rule;
833};
834
835#define IPV6_SADDR_SCORE_LOCAL 0x0001
836#define IPV6_SADDR_SCORE_PREFERRED 0x0004
837#define IPV6_SADDR_SCORE_HOA 0x0008
838#define IPV6_SADDR_SCORE_OIF 0x0010
839#define IPV6_SADDR_SCORE_LABEL 0x0020
840#define IPV6_SADDR_SCORE_PRIVACY 0x0040
841
842static int inline ipv6_saddr_preferred(int type)
1da177e4 843{
072047e4
YH		 844 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
845 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
846 return 1;
847 return 0;
1da177e4
LT		 848}
849
072047e4
YH		 850/* static matching label */
851static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
852{
853 /*
854 * prefix (longest match) label
855 * -----------------------------
856 * ::1/128 0
857 * ::/0 1
858 * 2002::/16 2
859 * ::/96 3
860 * ::ffff:0:0/96 4
861 */
862 if (type & IPV6_ADDR_LOOPBACK)
863 return 0;
864 else if (type & IPV6_ADDR_COMPATv4)
865 return 3;
866 else if (type & IPV6_ADDR_MAPPED)
867 return 4;
868 else if (addr->s6_addr16[0] == htons(0x2002))
869 return 2;
870 return 1;
871}
1da177e4 872
072047e4 873int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 874 struct in6_addr *daddr, struct in6_addr *saddr)
875{
072047e4
YH		 876 struct ipv6_saddr_score hiscore;
877 struct inet6_ifaddr *ifa_result = NULL;
878 int daddr_type = __ipv6_addr_type(daddr);
879 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
880 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
881 struct net_device *dev;
1da177e4 882
072047e4 883 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 884
072047e4
YH		 885 read_lock(&dev_base_lock);
886 read_lock(&addrconf_lock);
1da177e4 887
072047e4
YH		 888 for (dev = dev_base; dev; dev=dev->next) {
889 struct inet6_dev *idev;
890 struct inet6_ifaddr *ifa;
891
892 /* Rule 0: Candidate Source Address (section 4)
893 * - multicast and link-local destination address,
894 * the set of candidate source address MUST only
895 * include addresses assigned to interfaces
896 * belonging to the same link as the outgoing
897 * interface.
898 * (- For site-local destination addresses, the
899 * set of candidate source addresses MUST only
900 * include addresses assigned to interfaces
901 * belonging to the same site as the outgoing
902 * interface.)
903 */
904 if ((daddr_type & IPV6_ADDR_MULTICAST ||
905 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
906 daddr_dev && dev != daddr_dev)
907 continue;
1da177e4 908
1da177e4 909 idev = __in6_dev_get(dev);
072047e4
YH		 910 if (!idev)
911 continue;
912
913 read_lock_bh(&idev->lock);
914 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
915 struct ipv6_saddr_score score;
916
917 score.addr_type = __ipv6_addr_type(&ifa->addr);
918
6b3ae80a
YH		 919 /* Rule 0:
920 * - Tentative Address (RFC2462 section 5.4)
921 * - A tentative address is not considered
922 * "assigned to an interface" in the traditional
923 * sense.
924 * - Candidate Source Address (section 4)
072047e4
YH		 925 * - In any case, anycast addresses, multicast
926 * addresses, and the unspecified address MUST
927 * NOT be included in a candidate set.
928 */
6b3ae80a
YH		 929 if (ifa->flags & IFA_F_TENTATIVE)
930 continue;
072047e4
YH		 931 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
932 score.addr_type & IPV6_ADDR_MULTICAST)) {
933 LIMIT_NETDEBUG(KERN_DEBUG
934 "ADDRCONF: unspecified / multicast address"
935 "assigned as unicast address on %s",
936 dev->name);
937 continue;
938 }
939
940 score.attrs = 0;
941 score.matchlen = 0;
942 score.scope = 0;
943 score.rule = 0;
944
945 if (ifa_result == NULL) {
946 /* record it if the first available entry */
947 goto record_it;
948 }
949
950 /* Rule 1: Prefer same address */
951 if (hiscore.rule < 1) {
952 if (ipv6_addr_equal(&ifa_result->addr, daddr))
953 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
954 hiscore.rule++;
955 }
956 if (ipv6_addr_equal(&ifa->addr, daddr)) {
957 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
958 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
959 score.rule = 1;
960 goto record_it;
1da177e4 961 }
072047e4
YH		 962 } else {
963 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
964 continue;
1da177e4 965 }
1da177e4 966
072047e4
YH		 967 /* Rule 2: Prefer appropriate scope */
968 if (hiscore.rule < 2) {
969 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
970 hiscore.rule++;
971 }
972 score.scope = __ipv6_addr_src_scope(score.addr_type);
973 if (hiscore.scope < score.scope) {
974 if (hiscore.scope < daddr_scope) {
975 score.rule = 2;
976 goto record_it;
977 } else
978 continue;
979 } else if (score.scope < hiscore.scope) {
980 if (score.scope < daddr_scope)
981 continue;
982 else {
983 score.rule = 2;
984 goto record_it;
985 }
986 }
1da177e4 987
072047e4
YH		 988 /* Rule 3: Avoid deprecated address */
989 if (hiscore.rule < 3) {
990 if (ipv6_saddr_preferred(hiscore.addr_type) ||
991 !(ifa_result->flags & IFA_F_DEPRECATED))
992 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
993 hiscore.rule++;
994 }
995 if (ipv6_saddr_preferred(score.addr_type) ||
996 !(ifa->flags & IFA_F_DEPRECATED)) {
997 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
998 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
999 score.rule = 3;
1000 goto record_it;
1001 }
1002 } else {
1003 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1004 continue;
1005 }
1da177e4 1006
072047e4 1007 /* Rule 4: Prefer home address -- not implemented yet */
220bbd74
YH		 1008 if (hiscore.rule < 4)
1009 hiscore.rule++;
072047e4
YH		 1010
1011 /* Rule 5: Prefer outgoing interface */
1012 if (hiscore.rule < 5) {
1013 if (daddr_dev == NULL ||
1014 daddr_dev == ifa_result->idev->dev)
1015 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1016 hiscore.rule++;
1017 }
1018 if (daddr_dev == NULL ||
1019 daddr_dev == ifa->idev->dev) {
1020 score.attrs |= IPV6_SADDR_SCORE_OIF;
1021 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1022 score.rule = 5;
1023 goto record_it;
1024 }
1025 } else {
1026 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1027 continue;
1028 }
1029
1030 /* Rule 6: Prefer matching label */
1031 if (hiscore.rule < 6) {
1032 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1033 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1034 hiscore.rule++;
1035 }
1036 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1037 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1038 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1039 score.rule = 6;
1040 goto record_it;
1da177e4 1041 }
072047e4
YH		 1042 } else {
1043 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1044 continue;
1045 }
1046
44fd0261 1047#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1048 /* Rule 7: Prefer public address
1049 * Note: prefer temprary address if use_tempaddr >= 2
1050 */
1051 if (hiscore.rule < 7) {
1052 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1053 (ifa_result->idev->cnf.use_tempaddr >= 2))
1054 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1055 hiscore.rule++;
1056 }
1057 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1058 (ifa->idev->cnf.use_tempaddr >= 2)) {
1059 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1060 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1061 score.rule = 7;
1062 goto record_it;
1063 }
1064 } else {
1065 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1066 continue;
1067 }
44fd0261 1068#endif
072047e4 1069 /* Rule 8: Use longest matching prefix */
12da2a43 1070 if (hiscore.rule < 8) {
072047e4 1071 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1072 hiscore.rule++;
1073 }
072047e4
YH		 1074 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1075 if (score.matchlen > hiscore.matchlen) {
1076 score.rule = 8;
1077 goto record_it;
1da177e4 1078 }
072047e4
YH		 1079#if 0
1080 else if (score.matchlen < hiscore.matchlen)
1081 continue;
1082#endif
1083
1084 /* Final Rule: choose first available one */
1085 continue;
1086record_it:
1087 if (ifa_result)
1088 in6_ifa_put(ifa_result);
1089 in6_ifa_hold(ifa);
1090 ifa_result = ifa;
1091 hiscore = score;
1da177e4 1092 }
072047e4 1093 read_unlock_bh(&idev->lock);
1da177e4 1094 }
1da177e4
LT		 1095 read_unlock(&addrconf_lock);
1096 read_unlock(&dev_base_lock);
1097
072047e4
YH		 1098 if (!ifa_result)
1099 return -EADDRNOTAVAIL;
1100
1101 ipv6_addr_copy(saddr, &ifa_result->addr);
1102 in6_ifa_put(ifa_result);
1103 return 0;
1da177e4
LT		 1104}
1105
1106
1107int ipv6_get_saddr(struct dst_entry *dst,
1108 struct in6_addr *daddr, struct in6_addr *saddr)
1109{
1110 return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
1111}
1112
1113
1114int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1115{
1116 struct inet6_dev *idev;
1117 int err = -EADDRNOTAVAIL;
1118
1119 read_lock(&addrconf_lock);
1120 if ((idev = __in6_dev_get(dev)) != NULL) {
1121 struct inet6_ifaddr *ifp;
1122
1123 read_lock_bh(&idev->lock);
1124 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1125 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1126 ipv6_addr_copy(addr, &ifp->addr);
1127 err = 0;
1128 break;
1129 }
1130 }
1131 read_unlock_bh(&idev->lock);
1132 }
1133 read_unlock(&addrconf_lock);
1134 return err;
1135}
1136
1137static int ipv6_count_addresses(struct inet6_dev *idev)
1138{
1139 int cnt = 0;
1140 struct inet6_ifaddr *ifp;
1141
1142 read_lock_bh(&idev->lock);
1143 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1144 cnt++;
1145 read_unlock_bh(&idev->lock);
1146 return cnt;
1147}
1148
1149int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1150{
1151 struct inet6_ifaddr * ifp;
1152 u8 hash = ipv6_addr_hash(addr);
1153
1154 read_lock_bh(&addrconf_hash_lock);
1155 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1156 if (ipv6_addr_equal(&ifp->addr, addr) &&
1157 !(ifp->flags&IFA_F_TENTATIVE)) {
1158 if (dev == NULL || ifp->idev->dev == dev ||
1159 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1160 break;
1161 }
1162 }
1163 read_unlock_bh(&addrconf_hash_lock);
1164 return ifp != NULL;
1165}
1166
1167static
1168int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1169{
1170 struct inet6_ifaddr * ifp;
1171 u8 hash = ipv6_addr_hash(addr);
1172
1173 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1174 if (ipv6_addr_equal(&ifp->addr, addr)) {
1175 if (dev == NULL || ifp->idev->dev == dev)
1176 break;
1177 }
1178 }
1179 return ifp != NULL;
1180}
1181
1182struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1183{
1184 struct inet6_ifaddr * ifp;
1185 u8 hash = ipv6_addr_hash(addr);
1186
1187 read_lock_bh(&addrconf_hash_lock);
1188 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1189 if (ipv6_addr_equal(&ifp->addr, addr)) {
1190 if (dev == NULL || ifp->idev->dev == dev ||
1191 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1192 in6_ifa_hold(ifp);
1193 break;
1194 }
1195 }
1196 }
1197 read_unlock_bh(&addrconf_hash_lock);
1198
1199 return ifp;
1200}
1201
1202int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1203{
1204 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1205 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1da177e4 1206 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
8feaf0c0 1207 u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1208 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1209 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1210 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1211 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1212
1213 if (!sk2_rcv_saddr && !sk_ipv6only)
1214 return 1;
1215
1216 if (addr_type2 == IPV6_ADDR_ANY &&
1217 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1218 return 1;
1219
1220 if (addr_type == IPV6_ADDR_ANY &&
1221 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1222 return 1;
1223
1224 if (sk2_rcv_saddr6 &&
1225 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1226 return 1;
1227
1228 if (addr_type == IPV6_ADDR_MAPPED &&
1229 !sk2_ipv6only &&
1230 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1231 return 1;
1232
1233 return 0;
1234}
1235
1236/* Gets referenced address, destroys ifaddr */
1237
9f5336e2 1238static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1239{
1da177e4
LT		 1240 if (ifp->flags&IFA_F_PERMANENT) {
1241 spin_lock_bh(&ifp->lock);
1242 addrconf_del_timer(ifp);
1243 ifp->flags |= IFA_F_TENTATIVE;
1244 spin_unlock_bh(&ifp->lock);
1245 in6_ifa_put(ifp);
1246#ifdef CONFIG_IPV6_PRIVACY
1247 } else if (ifp->flags&IFA_F_TEMPORARY) {
1248 struct inet6_ifaddr *ifpub;
1249 spin_lock_bh(&ifp->lock);
1250 ifpub = ifp->ifpub;
1251 if (ifpub) {
1252 in6_ifa_hold(ifpub);
1253 spin_unlock_bh(&ifp->lock);
1254 ipv6_create_tempaddr(ifpub, ifp);
1255 in6_ifa_put(ifpub);
1256 } else {
1257 spin_unlock_bh(&ifp->lock);
1258 }
1259 ipv6_del_addr(ifp);
1260#endif
1261 } else
1262 ipv6_del_addr(ifp);
1263}
1264
3c21edbd
YH		 1265void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1266{
1267 if (net_ratelimit())
1268 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1269 addrconf_dad_stop(ifp);
1270}
1da177e4
LT		 1271
1272/* Join to solicited addr multicast group. */
1273
1274void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1275{
1276 struct in6_addr maddr;
1277
1278 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1279 return;
1280
1281 addrconf_addr_solict_mult(addr, &maddr);
1282 ipv6_dev_mc_inc(dev, &maddr);
1283}
1284
1285void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1286{
1287 struct in6_addr maddr;
1288
1289 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1290 return;
1291
1292 addrconf_addr_solict_mult(addr, &maddr);
1293 __ipv6_dev_mc_dec(idev, &maddr);
1294}
1295
20380731 1296static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1297{
1298 struct in6_addr addr;
1299 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1300 if (ipv6_addr_any(&addr))
1301 return;
1302 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1303}
1304
20380731 1305static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1306{
1307 struct in6_addr addr;
1308 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1309 if (ipv6_addr_any(&addr))
1310 return;
1311 __ipv6_dev_ac_dec(ifp->idev, &addr);
1312}
1313
073a8e0e
YH		 1314static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1315{
1316 if (dev->addr_len != ETH_ALEN)
1317 return -1;
1318 memcpy(eui, dev->dev_addr, 3);
1319 memcpy(eui + 5, dev->dev_addr + 3, 3);
1320
1321 /*
1322 * The zSeries OSA network cards can be shared among various
1323 * OS instances, but the OSA cards have only one MAC address.
1324 * This leads to duplicate address conflicts in conjunction
1325 * with IPv6 if more than one instance uses the same card.
1326 *
1327 * The driver for these cards can deliver a unique 16-bit
1328 * identifier for each instance sharing the same card. It is
1329 * placed instead of 0xFFFE in the interface identifier. The
1330 * "u" bit of the interface identifier is not inverted in this
1331 * case. Hence the resulting interface identifier has local
1332 * scope according to RFC2373.
1333 */
1334 if (dev->dev_id) {
1335 eui[3] = (dev->dev_id >> 8) & 0xFF;
1336 eui[4] = dev->dev_id & 0xFF;
1337 } else {
1338 eui[3] = 0xFF;
1339 eui[4] = 0xFE;
1340 eui[0] ^= 2;
1341 }
1342 return 0;
1343}
1344
1345static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1346{
1347 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1348 if (dev->addr_len != ARCNET_ALEN)
1349 return -1;
1350 memset(eui, 0, 7);
1351 eui[7] = *(u8*)dev->dev_addr;
1352 return 0;
1353}
1354
1355static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1356{
1357 if (dev->addr_len != INFINIBAND_ALEN)
1358 return -1;
1359 memcpy(eui, dev->dev_addr + 12, 8);
1360 eui[0] |= 2;
1361 return 0;
1362}
1363
1da177e4
LT		 1364static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1365{
1366 switch (dev->type) {
1367 case ARPHRD_ETHER:
1368 case ARPHRD_FDDI:
1369 case ARPHRD_IEEE802_TR:
073a8e0e 1370 return addrconf_ifid_eui48(eui, dev);
1da177e4 1371 case ARPHRD_ARCNET:
073a8e0e 1372 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1373 case ARPHRD_INFINIBAND:
073a8e0e 1374 return addrconf_ifid_infiniband(eui, dev);
1da177e4
LT		 1375 }
1376 return -1;
1377}
1378
1379static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1380{
1381 int err = -1;
1382 struct inet6_ifaddr *ifp;
1383
1384 read_lock_bh(&idev->lock);
1385 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1386 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1387 memcpy(eui, ifp->addr.s6_addr+8, 8);
1388 err = 0;
1389 break;
1390 }
1391 }
1392 read_unlock_bh(&idev->lock);
1393 return err;
1394}
1395
1396#ifdef CONFIG_IPV6_PRIVACY
1397/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1398static int __ipv6_regen_rndid(struct inet6_dev *idev)
1399{
1da177e4 1400regen:
955189ef 1401 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1402 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1403
1404 /*
1405 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1406 * check if generated address is not inappropriate
1407 *
1408 * - Reserved subnet anycast (RFC 2526)
1409 * 11111101 11....11 1xxxxxxx
1410 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1411 * 00-00-5E-FE-xx-xx-xx-xx
1412 * - value 0
1413 * - XXX: already assigned to an address on the device
1414 */
1415 if (idev->rndid[0] == 0xfd &&
1416 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1417 (idev->rndid[7]&0x80))
1418 goto regen;
1419 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1420 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1421 goto regen;
1422 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1423 goto regen;
1424 }
1425
1426 return 0;
1427}
1428
1429static void ipv6_regen_rndid(unsigned long data)
1430{
1431 struct inet6_dev *idev = (struct inet6_dev *) data;
1432 unsigned long expires;
1433
1434 read_lock_bh(&addrconf_lock);
1435 write_lock_bh(&idev->lock);
1436
1437 if (idev->dead)
1438 goto out;
1439
1440 if (__ipv6_regen_rndid(idev) < 0)
1441 goto out;
1442
1443 expires = jiffies +
1444 idev->cnf.temp_prefered_lft * HZ -
1445 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1446 if (time_before(expires, jiffies)) {
1447 printk(KERN_WARNING
1448 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1449 idev->dev->name);
1450 goto out;
1451 }
1452
1453 if (!mod_timer(&idev->regen_timer, expires))
1454 in6_dev_hold(idev);
1455
1456out:
1457 write_unlock_bh(&idev->lock);
1458 read_unlock_bh(&addrconf_lock);
1459 in6_dev_put(idev);
1460}
1461
1462static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1463 int ret = 0;
1464
1465 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1466 ret = __ipv6_regen_rndid(idev);
1467 return ret;
1468}
1469#endif
1470
1471/*
1472 * Add prefix route.
1473 */
1474
1475static void
1476addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1477 unsigned long expires, u32 flags)
1da177e4
LT		 1478{
1479 struct in6_rtmsg rtmsg;
1480
1481 memset(&rtmsg, 0, sizeof(rtmsg));
1482 ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
1483 rtmsg.rtmsg_dst_len = plen;
1484 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1485 rtmsg.rtmsg_ifindex = dev->ifindex;
1486 rtmsg.rtmsg_info = expires;
1487 rtmsg.rtmsg_flags = RTF_UP|flags;
1488 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1489
1490 /* Prevent useless cloning on PtP SIT.
1491 This thing is done here expecting that the whole
1492 class of non-broadcast devices need not cloning.
1493 */
1494 if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
1495 rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
1496
0d51aa80 1497 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1498}
1499
1500/* Create "default" multicast route to the interface */
1501
1502static void addrconf_add_mroute(struct net_device *dev)
1503{
1504 struct in6_rtmsg rtmsg;
1505
1506 memset(&rtmsg, 0, sizeof(rtmsg));
1507 ipv6_addr_set(&rtmsg.rtmsg_dst,
1508 htonl(0xFF000000), 0, 0, 0);
1509 rtmsg.rtmsg_dst_len = 8;
1510 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1511 rtmsg.rtmsg_ifindex = dev->ifindex;
1512 rtmsg.rtmsg_flags = RTF_UP;
1513 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
0d51aa80 1514 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1515}
1516
1517static void sit_route_add(struct net_device *dev)
1518{
1519 struct in6_rtmsg rtmsg;
1520
1521 memset(&rtmsg, 0, sizeof(rtmsg));
1522
1523 rtmsg.rtmsg_type = RTMSG_NEWROUTE;
1524 rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
1525
1526 /* prefix length - 96 bits "::d.d.d.d" */
1527 rtmsg.rtmsg_dst_len = 96;
1528 rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
1529 rtmsg.rtmsg_ifindex = dev->ifindex;
1530
0d51aa80 1531 ip6_route_add(&rtmsg, NULL, NULL, NULL);
1da177e4
LT		 1532}
1533
1534static void addrconf_add_lroute(struct net_device *dev)
1535{
1536 struct in6_addr addr;
1537
1538 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1539 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1540}
1541
1542static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1543{
1544 struct inet6_dev *idev;
1545
1546 ASSERT_RTNL();
1547
1548 if ((idev = ipv6_find_idev(dev)) == NULL)
1549 return NULL;
1550
1551 /* Add default multicast route */
1552 addrconf_add_mroute(dev);
1553
1554 /* Add link local route */
1555 addrconf_add_lroute(dev);
1556 return idev;
1557}
1558
1559void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1560{
1561 struct prefix_info *pinfo;
1562 __u32 valid_lft;
1563 __u32 prefered_lft;
1564 int addr_type;
1565 unsigned long rt_expires;
1566 struct inet6_dev *in6_dev;
1567
1568 pinfo = (struct prefix_info *) opt;
1569
1570 if (len < sizeof(struct prefix_info)) {
1571 ADBG(("addrconf: prefix option too short\n"));
1572 return;
1573 }
1574
1575 /*
1576 * Validation checks ([ADDRCONF], page 19)
1577 */
1578
1579 addr_type = ipv6_addr_type(&pinfo->prefix);
1580
1581 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1582 return;
1583
1584 valid_lft = ntohl(pinfo->valid);
1585 prefered_lft = ntohl(pinfo->prefered);
1586
1587 if (prefered_lft > valid_lft) {
1588 if (net_ratelimit())
1589 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1590 return;
1591 }
1592
1593 in6_dev = in6_dev_get(dev);
1594
1595 if (in6_dev == NULL) {
1596 if (net_ratelimit())
1597 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1598 return;
1599 }
1600
1601 /*
1602 * Two things going on here:
1603 * 1) Add routes for on-link prefixes
1604 * 2) Configure prefixes with the auto flag set
1605 */
1606
1607 /* Avoid arithmetic overflow. Really, we could
1608 save rt_expires in seconds, likely valid_lft,
1609 but it would require division in fib gc, that it
1610 not good.
1611 */
1612 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1613 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1614 else
3dd4bc68
YH		 1615 rt_expires = valid_lft * HZ;
1616
1617 /*
1618 * We convert this (in jiffies) to clock_t later.
1619 * Avoid arithmetic overflow there as well.
1620 * Overflow can happen only if HZ < USER_HZ.
1621 */
1622 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1623 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1624
1625 if (pinfo->onlink) {
1626 struct rt6_info *rt;
1627 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1628
1629 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1630 if (rt->rt6i_flags&RTF_EXPIRES) {
1631 if (valid_lft == 0) {
0d51aa80 1632 ip6_del_rt(rt, NULL, NULL, NULL);
1da177e4
LT		 1633 rt = NULL;
1634 } else {
3dd4bc68 1635 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1636 }
1637 }
1638 } else if (valid_lft) {
1639 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1640 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1641 }
1642 if (rt)
1643 dst_release(&rt->u.dst);
1644 }
1645
1646 /* Try to figure out our local address for this prefix */
1647
1648 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1649 struct inet6_ifaddr * ifp;
1650 struct in6_addr addr;
1651 int create = 0, update_lft = 0;
1652
1653 if (pinfo->prefix_len == 64) {
1654 memcpy(&addr, &pinfo->prefix, 8);
1655 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1656 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1657 in6_dev_put(in6_dev);
1658 return;
1659 }
1660 goto ok;
1661 }
1662 if (net_ratelimit())
1663 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1664 pinfo->prefix_len);
1665 in6_dev_put(in6_dev);
1666 return;
1667
1668ok:
1669
1670 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1671
1672 if (ifp == NULL && valid_lft) {
1673 int max_addresses = in6_dev->cnf.max_addresses;
1674
1675 /* Do not allow to create too much of autoconfigured
1676 * addresses; this would be too easy way to crash kernel.
1677 */
1678 if (!max_addresses ||
1679 ipv6_count_addresses(in6_dev) < max_addresses)
1680 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1681 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1682
1683 if (!ifp || IS_ERR(ifp)) {
1684 in6_dev_put(in6_dev);
1685 return;
1686 }
1687
1688 update_lft = create = 1;
1689 ifp->cstamp = jiffies;
1690 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1691 }
1692
1693 if (ifp) {
1694 int flags;
1695 unsigned long now;
1696#ifdef CONFIG_IPV6_PRIVACY
1697 struct inet6_ifaddr *ift;
1698#endif
1699 u32 stored_lft;
1700
1701 /* update lifetime (RFC2462 5.5.3 e) */
1702 spin_lock(&ifp->lock);
1703 now = jiffies;
1704 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1705 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1706 else
1707 stored_lft = 0;
1708 if (!update_lft && stored_lft) {
1709 if (valid_lft > MIN_VALID_LIFETIME ||
1710 valid_lft > stored_lft)
1711 update_lft = 1;
1712 else if (stored_lft <= MIN_VALID_LIFETIME) {
1713 /* valid_lft <= stored_lft is always true */
1714 /* XXX: IPsec */
1715 update_lft = 0;
1716 } else {
1717 valid_lft = MIN_VALID_LIFETIME;
1718 if (valid_lft < prefered_lft)
1719 prefered_lft = valid_lft;
1720 update_lft = 1;
1721 }
1722 }
1723
1724 if (update_lft) {
1725 ifp->valid_lft = valid_lft;
1726 ifp->prefered_lft = prefered_lft;
1727 ifp->tstamp = now;
1728 flags = ifp->flags;
1729 ifp->flags &= ~IFA_F_DEPRECATED;
1730 spin_unlock(&ifp->lock);
1731
1732 if (!(flags&IFA_F_TENTATIVE))
1733 ipv6_ifa_notify(0, ifp);
1734 } else
1735 spin_unlock(&ifp->lock);
1736
1737#ifdef CONFIG_IPV6_PRIVACY
1738 read_lock_bh(&in6_dev->lock);
1739 /* update all temporary addresses in the list */
1740 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1741 /*
1742 * When adjusting the lifetimes of an existing
1743 * temporary address, only lower the lifetimes.
1744 * Implementations must not increase the
1745 * lifetimes of an existing temporary address
1746 * when processing a Prefix Information Option.
1747 */
1748 spin_lock(&ift->lock);
1749 flags = ift->flags;
1750 if (ift->valid_lft > valid_lft &&
1751 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1752 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1753 if (ift->prefered_lft > prefered_lft &&
1754 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1755 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1756 spin_unlock(&ift->lock);
1757 if (!(flags&IFA_F_TENTATIVE))
1758 ipv6_ifa_notify(0, ift);
1759 }
1760
1761 if (create && in6_dev->cnf.use_tempaddr > 0) {
1762 /*
1763 * When a new public address is created as described in [ADDRCONF],
1764 * also create a new temporary address.
1765 */
1766 read_unlock_bh(&in6_dev->lock);
1767 ipv6_create_tempaddr(ifp, NULL);
1768 } else {
1769 read_unlock_bh(&in6_dev->lock);
1770 }
1771#endif
1772 in6_ifa_put(ifp);
1773 addrconf_verify(0);
1774 }
1775 }
1776 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1777 in6_dev_put(in6_dev);
1778}
1779
1780/*
1781 * Set destination address.
1782 * Special case for SIT interfaces where we create a new "virtual"
1783 * device.
1784 */
1785int addrconf_set_dstaddr(void __user *arg)
1786{
1787 struct in6_ifreq ireq;
1788 struct net_device *dev;
1789 int err = -EINVAL;
1790
1791 rtnl_lock();
1792
1793 err = -EFAULT;
1794 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1795 goto err_exit;
1796
1797 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1798
1799 err = -ENODEV;
1800 if (dev == NULL)
1801 goto err_exit;
1802
1803 if (dev->type == ARPHRD_SIT) {
1804 struct ifreq ifr;
1805 mm_segment_t oldfs;
1806 struct ip_tunnel_parm p;
1807
1808 err = -EADDRNOTAVAIL;
1809 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1810 goto err_exit;
1811
1812 memset(&p, 0, sizeof(p));
1813 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1814 p.iph.saddr = 0;
1815 p.iph.version = 4;
1816 p.iph.ihl = 5;
1817 p.iph.protocol = IPPROTO_IPV6;
1818 p.iph.ttl = 64;
1819 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1820
1821 oldfs = get_fs(); set_fs(KERNEL_DS);
1822 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1823 set_fs(oldfs);
1824
1825 if (err == 0) {
1826 err = -ENOBUFS;
1827 if ((dev = __dev_get_by_name(p.name)) == NULL)
1828 goto err_exit;
1829 err = dev_open(dev);
1830 }
1831 }
1832
1833err_exit:
1834 rtnl_unlock();
1835 return err;
1836}
1837
1838/*
1839 * Manual configuration of address on an interface
1840 */
1841static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
1842{
1843 struct inet6_ifaddr *ifp;
1844 struct inet6_dev *idev;
1845 struct net_device *dev;
1846 int scope;
1847
1848 ASSERT_RTNL();
1849
1850 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1851 return -ENODEV;
1852
1853 if (!(dev->flags&IFF_UP))
1854 return -ENETDOWN;
1855
1856 if ((idev = addrconf_add_dev(dev)) == NULL)
1857 return -ENOBUFS;
1858
1859 scope = ipv6_addr_scope(pfx);
1860
1861 ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
1862 if (!IS_ERR(ifp)) {
1863 addrconf_dad_start(ifp, 0);
1864 in6_ifa_put(ifp);
1865 return 0;
1866 }
1867
1868 return PTR_ERR(ifp);
1869}
1870
1871static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1872{
1873 struct inet6_ifaddr *ifp;
1874 struct inet6_dev *idev;
1875 struct net_device *dev;
1876
1877 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1878 return -ENODEV;
1879
1880 if ((idev = __in6_dev_get(dev)) == NULL)
1881 return -ENXIO;
1882
1883 read_lock_bh(&idev->lock);
1884 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1885 if (ifp->prefix_len == plen &&
1886 ipv6_addr_equal(pfx, &ifp->addr)) {
1887 in6_ifa_hold(ifp);
1888 read_unlock_bh(&idev->lock);
1889
1890 ipv6_del_addr(ifp);
1891
1892 /* If the last address is deleted administratively,
1893 disable IPv6 on this interface.
1894 */
1895 if (idev->addr_list == NULL)
1896 addrconf_ifdown(idev->dev, 1);
1897 return 0;
1898 }
1899 }
1900 read_unlock_bh(&idev->lock);
1901 return -EADDRNOTAVAIL;
1902}
1903
1904
1905int addrconf_add_ifaddr(void __user *arg)
1906{
1907 struct in6_ifreq ireq;
1908 int err;
1909
1910 if (!capable(CAP_NET_ADMIN))
1911 return -EPERM;
1912
1913 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1914 return -EFAULT;
1915
1916 rtnl_lock();
1917 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1918 rtnl_unlock();
1919 return err;
1920}
1921
1922int addrconf_del_ifaddr(void __user *arg)
1923{
1924 struct in6_ifreq ireq;
1925 int err;
1926
1927 if (!capable(CAP_NET_ADMIN))
1928 return -EPERM;
1929
1930 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1931 return -EFAULT;
1932
1933 rtnl_lock();
1934 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1935 rtnl_unlock();
1936 return err;
1937}
1938
1939static void sit_add_v4_addrs(struct inet6_dev *idev)
1940{
1941 struct inet6_ifaddr * ifp;
1942 struct in6_addr addr;
1943 struct net_device *dev;
1944 int scope;
1945
1946 ASSERT_RTNL();
1947
1948 memset(&addr, 0, sizeof(struct in6_addr));
1949 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
1950
1951 if (idev->dev->flags&IFF_POINTOPOINT) {
1952 addr.s6_addr32[0] = htonl(0xfe800000);
1953 scope = IFA_LINK;
1954 } else {
1955 scope = IPV6_ADDR_COMPATv4;
1956 }
1957
1958 if (addr.s6_addr32[3]) {
1959 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
1960 if (!IS_ERR(ifp)) {
1961 spin_lock_bh(&ifp->lock);
1962 ifp->flags &= ~IFA_F_TENTATIVE;
1963 spin_unlock_bh(&ifp->lock);
1964 ipv6_ifa_notify(RTM_NEWADDR, ifp);
1965 in6_ifa_put(ifp);
1966 }
1967 return;
1968 }
1969
1970 for (dev = dev_base; dev != NULL; dev = dev->next) {
e5ed6399 1971 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 1972 if (in_dev && (dev->flags & IFF_UP)) {
1973 struct in_ifaddr * ifa;
1974
1975 int flag = scope;
1976
1977 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
1978 int plen;
1979
1980 addr.s6_addr32[3] = ifa->ifa_local;
1981
1982 if (ifa->ifa_scope == RT_SCOPE_LINK)
1983 continue;
1984 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
1985 if (idev->dev->flags&IFF_POINTOPOINT)
1986 continue;
1987 flag |= IFA_HOST;
1988 }
1989 if (idev->dev->flags&IFF_POINTOPOINT)
1990 plen = 64;
1991 else
1992 plen = 96;
1993
1994 ifp = ipv6_add_addr(idev, &addr, plen, flag,
1995 IFA_F_PERMANENT);
1996 if (!IS_ERR(ifp)) {
1997 spin_lock_bh(&ifp->lock);
1998 ifp->flags &= ~IFA_F_TENTATIVE;
1999 spin_unlock_bh(&ifp->lock);
2000 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2001 in6_ifa_put(ifp);
2002 }
2003 }
2004 }
2005 }
2006}
2007
2008static void init_loopback(struct net_device *dev)
2009{
2010 struct inet6_dev *idev;
2011 struct inet6_ifaddr * ifp;
2012
2013 /* ::1 */
2014
2015 ASSERT_RTNL();
2016
2017 if ((idev = ipv6_find_idev(dev)) == NULL) {
2018 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2019 return;
2020 }
2021
2022 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2023 if (!IS_ERR(ifp)) {
2024 spin_lock_bh(&ifp->lock);
2025 ifp->flags &= ~IFA_F_TENTATIVE;
2026 spin_unlock_bh(&ifp->lock);
2027 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2028 in6_ifa_put(ifp);
2029 }
2030}
2031
2032static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2033{
2034 struct inet6_ifaddr * ifp;
2035
2036 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2037 if (!IS_ERR(ifp)) {
2038 addrconf_dad_start(ifp, 0);
2039 in6_ifa_put(ifp);
2040 }
2041}
2042
2043static void addrconf_dev_config(struct net_device *dev)
2044{
2045 struct in6_addr addr;
2046 struct inet6_dev * idev;
2047
2048 ASSERT_RTNL();
2049
2050 if ((dev->type != ARPHRD_ETHER) &&
2051 (dev->type != ARPHRD_FDDI) &&
2052 (dev->type != ARPHRD_IEEE802_TR) &&
2053 (dev->type != ARPHRD_ARCNET) &&
2054 (dev->type != ARPHRD_INFINIBAND)) {
2055 /* Alas, we support only Ethernet autoconfiguration. */
2056 return;
2057 }
2058
2059 idev = addrconf_add_dev(dev);
2060 if (idev == NULL)
2061 return;
2062
2063 memset(&addr, 0, sizeof(struct in6_addr));
2064 addr.s6_addr32[0] = htonl(0xFE800000);
2065
2066 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2067 addrconf_add_linklocal(idev, &addr);
2068}
2069
2070static void addrconf_sit_config(struct net_device *dev)
2071{
2072 struct inet6_dev *idev;
2073
2074 ASSERT_RTNL();
2075
2076 /*
2077 * Configure the tunnel with one of our IPv4
2078 * addresses... we should configure all of
2079 * our v4 addrs in the tunnel
2080 */
2081
2082 if ((idev = ipv6_find_idev(dev)) == NULL) {
2083 printk(KERN_DEBUG "init sit: add_dev failed\n");
2084 return;
2085 }
2086
2087 sit_add_v4_addrs(idev);
2088
2089 if (dev->flags&IFF_POINTOPOINT) {
2090 addrconf_add_mroute(dev);
2091 addrconf_add_lroute(dev);
2092 } else
2093 sit_route_add(dev);
2094}
2095
2096static inline int
2097ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2098{
2099 struct in6_addr lladdr;
2100
2101 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2102 addrconf_add_linklocal(idev, &lladdr);
2103 return 0;
2104 }
2105 return -1;
2106}
2107
2108static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2109{
2110 struct net_device *link_dev;
2111
2112 /* first try to inherit the link-local address from the link device */
2113 if (idev->dev->iflink &&
2114 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2115 if (!ipv6_inherit_linklocal(idev, link_dev))
2116 return;
2117 }
2118 /* then try to inherit it from any device */
2119 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2120 if (!ipv6_inherit_linklocal(idev, link_dev))
2121 return;
2122 }
2123 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2124}
2125
2126/*
2127 * Autoconfigure tunnel with a link-local address so routing protocols,
2128 * DHCPv6, MLD etc. can be run over the virtual link
2129 */
2130
2131static void addrconf_ip6_tnl_config(struct net_device *dev)
2132{
2133 struct inet6_dev *idev;
2134
2135 ASSERT_RTNL();
2136
2137 if ((idev = addrconf_add_dev(dev)) == NULL) {
2138 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2139 return;
2140 }
2141 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2142}
2143
2144static int addrconf_notify(struct notifier_block *this, unsigned long event,
2145 void * data)
2146{
2147 struct net_device *dev = (struct net_device *) data;
2148 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2149 int run_pending = 0;
1da177e4
LT		 2150
2151 switch(event) {
2152 case NETDEV_UP:
3c21edbd
YH		 2153 case NETDEV_CHANGE:
2154 if (event == NETDEV_UP) {
2155 if (!netif_carrier_ok(dev)) {
2156 /* device is not ready yet. */
2157 printk(KERN_INFO
2158 "ADDRCONF(NETDEV_UP): %s: "
2159 "link is not ready\n",
2160 dev->name);
2161 break;
2162 }
99081049
KS		 2163
2164 if (idev)
2165 idev->if_flags |= IF_READY;
3c21edbd
YH		 2166 } else {
2167 if (!netif_carrier_ok(dev)) {
2168 /* device is still not ready. */
2169 break;
2170 }
2171
2172 if (idev) {
2173 if (idev->if_flags & IF_READY) {
2174 /* device is already configured. */
2175 break;
2176 }
2177 idev->if_flags |= IF_READY;
2178 }
2179
2180 printk(KERN_INFO
2181 "ADDRCONF(NETDEV_CHANGE): %s: "
2182 "link becomes ready\n",
2183 dev->name);
2184
c5e33bdd 2185 run_pending = 1;
3c21edbd
YH		 2186 }
2187
1da177e4
LT		 2188 switch(dev->type) {
2189 case ARPHRD_SIT:
2190 addrconf_sit_config(dev);
2191 break;
2192 case ARPHRD_TUNNEL6:
2193 addrconf_ip6_tnl_config(dev);
2194 break;
2195 case ARPHRD_LOOPBACK:
2196 init_loopback(dev);
2197 break;
2198
2199 default:
2200 addrconf_dev_config(dev);
2201 break;
2202 };
2203 if (idev) {
c5e33bdd
YH		 2204 if (run_pending)
2205 addrconf_dad_run(idev);
2206
1da177e4
LT		 2207 /* If the MTU changed during the interface down, when the
2208 interface up, the changed MTU must be reflected in the
2209 idev as well as routers.
2210 */
2211 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2212 rt6_mtu_change(dev, dev->mtu);
2213 idev->cnf.mtu6 = dev->mtu;
2214 }
2215 idev->tstamp = jiffies;
2216 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2217 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2218 stop IPv6 on this interface.
2219 */
2220 if (dev->mtu < IPV6_MIN_MTU)
2221 addrconf_ifdown(dev, event != NETDEV_DOWN);
2222 }
2223 break;
2224
2225 case NETDEV_CHANGEMTU:
2226 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2227 rt6_mtu_change(dev, dev->mtu);
2228 idev->cnf.mtu6 = dev->mtu;
2229 break;
2230 }
2231
2232 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2233
2234 case NETDEV_DOWN:
2235 case NETDEV_UNREGISTER:
2236 /*
2237 * Remove all addresses from this interface.
2238 */
2239 addrconf_ifdown(dev, event != NETDEV_DOWN);
2240 break;
3c21edbd 2241
1da177e4
LT		 2242 case NETDEV_CHANGENAME:
2243#ifdef CONFIG_SYSCTL
2244 if (idev) {
2245 addrconf_sysctl_unregister(&idev->cnf);
2246 neigh_sysctl_unregister(idev->nd_parms);
2247 neigh_sysctl_register(dev, idev->nd_parms,
2248 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2249 &ndisc_ifinfo_sysctl_change,
2250 NULL);
2251 addrconf_sysctl_register(idev, &idev->cnf);
2252 }
2253#endif
2254 break;
2255 };
2256
2257 return NOTIFY_OK;
2258}
2259
2260/*
2261 * addrconf module should be notified of a device going up
2262 */
2263static struct notifier_block ipv6_dev_notf = {
2264 .notifier_call = addrconf_notify,
2265 .priority = 0
2266};
2267
2268static int addrconf_ifdown(struct net_device *dev, int how)
2269{
2270 struct inet6_dev *idev;
2271 struct inet6_ifaddr *ifa, **bifa;
2272 int i;
2273
2274 ASSERT_RTNL();
2275
2276 if (dev == &loopback_dev && how == 1)
2277 how = 0;
2278
2279 rt6_ifdown(dev);
2280 neigh_ifdown(&nd_tbl, dev);
2281
2282 idev = __in6_dev_get(dev);
2283 if (idev == NULL)
2284 return -ENODEV;
2285
2286 /* Step 1: remove reference to ipv6 device from parent device.
2287 Do not dev_put!
2288 */
2289 if (how == 1) {
2290 write_lock_bh(&addrconf_lock);
2291 dev->ip6_ptr = NULL;
2292 idev->dead = 1;
2293 write_unlock_bh(&addrconf_lock);
2294
2295 /* Step 1.5: remove snmp6 entry */
2296 snmp6_unregister_dev(idev);
2297
2298 }
2299
2300 /* Step 2: clear hash table */
2301 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2302 bifa = &inet6_addr_lst[i];
2303
2304 write_lock_bh(&addrconf_hash_lock);
2305 while ((ifa = *bifa) != NULL) {
2306 if (ifa->idev == idev) {
2307 *bifa = ifa->lst_next;
2308 ifa->lst_next = NULL;
2309 addrconf_del_timer(ifa);
2310 in6_ifa_put(ifa);
2311 continue;
2312 }
2313 bifa = &ifa->lst_next;
2314 }
2315 write_unlock_bh(&addrconf_hash_lock);
2316 }
2317
2318 write_lock_bh(&idev->lock);
2319
2320 /* Step 3: clear flags for stateless addrconf */
2321 if (how != 1)
3c21edbd 2322 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2323
2324 /* Step 4: clear address list */
2325#ifdef CONFIG_IPV6_PRIVACY
2326 if (how == 1 && del_timer(&idev->regen_timer))
2327 in6_dev_put(idev);
2328
2329 /* clear tempaddr list */
2330 while ((ifa = idev->tempaddr_list) != NULL) {
2331 idev->tempaddr_list = ifa->tmp_next;
2332 ifa->tmp_next = NULL;
2333 ifa->dead = 1;
2334 write_unlock_bh(&idev->lock);
2335 spin_lock_bh(&ifa->lock);
2336
2337 if (ifa->ifpub) {
2338 in6_ifa_put(ifa->ifpub);
2339 ifa->ifpub = NULL;
2340 }
2341 spin_unlock_bh(&ifa->lock);
2342 in6_ifa_put(ifa);
2343 write_lock_bh(&idev->lock);
2344 }
2345#endif
2346 while ((ifa = idev->addr_list) != NULL) {
2347 idev->addr_list = ifa->if_next;
2348 ifa->if_next = NULL;
2349 ifa->dead = 1;
2350 addrconf_del_timer(ifa);
2351 write_unlock_bh(&idev->lock);
2352
2353 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2354 in6_ifa_put(ifa);
2355
2356 write_lock_bh(&idev->lock);
2357 }
2358 write_unlock_bh(&idev->lock);
2359
2360 /* Step 5: Discard multicast list */
2361
2362 if (how == 1)
2363 ipv6_mc_destroy_dev(idev);
2364 else
2365 ipv6_mc_down(idev);
2366
2367 /* Step 5: netlink notification of this interface */
2368 idev->tstamp = jiffies;
979ad663 2369 inet6_ifinfo_notify(RTM_DELLINK, idev);
1da177e4
LT		 2370
2371 /* Shot the device (if unregistered) */
2372
2373 if (how == 1) {
2374#ifdef CONFIG_SYSCTL
2375 addrconf_sysctl_unregister(&idev->cnf);
2376 neigh_sysctl_unregister(idev->nd_parms);
2377#endif
2378 neigh_parms_release(&nd_tbl, idev->nd_parms);
2379 neigh_ifdown(&nd_tbl, dev);
2380 in6_dev_put(idev);
2381 }
2382 return 0;
2383}
2384
2385static void addrconf_rs_timer(unsigned long data)
2386{
2387 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2388
2389 if (ifp->idev->cnf.forwarding)
2390 goto out;
2391
2392 if (ifp->idev->if_flags & IF_RA_RCVD) {
2393 /*
2394 * Announcement received after solicitation
2395 * was sent
2396 */
2397 goto out;
2398 }
2399
2400 spin_lock(&ifp->lock);
2401 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2402 struct in6_addr all_routers;
2403
2404 /* The wait after the last probe can be shorter */
2405 addrconf_mod_timer(ifp, AC_RS,
2406 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2407 ifp->idev->cnf.rtr_solicit_delay :
2408 ifp->idev->cnf.rtr_solicit_interval);
2409 spin_unlock(&ifp->lock);
2410
2411 ipv6_addr_all_routers(&all_routers);
2412
2413 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2414 } else {
2415 spin_unlock(&ifp->lock);
2416 /*
2417 * Note: we do not support deprecated "all on-link"
2418 * assumption any longer.
2419 */
2420 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2421 ifp->idev->dev->name);
2422 }
2423
2424out:
2425 in6_ifa_put(ifp);
2426}
2427
2428/*
2429 * Duplicate Address Detection
2430 */
3c21edbd
YH		 2431static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2432{
2433 unsigned long rand_num;
2434 struct inet6_dev *idev = ifp->idev;
2435
2436 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2437 ifp->probes = idev->cnf.dad_transmits;
2438 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2439}
2440
e431b8c0 2441static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2442{
2443 struct inet6_dev *idev = ifp->idev;
2444 struct net_device *dev = idev->dev;
1da177e4
LT		 2445
2446 addrconf_join_solict(dev, &ifp->addr);
2447
2448 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2449 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2450 flags);
2451
2452 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2453
2454 read_lock_bh(&idev->lock);
2455 if (ifp->dead)
2456 goto out;
2457 spin_lock_bh(&ifp->lock);
2458
2459 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2460 !(ifp->flags&IFA_F_TENTATIVE)) {
2461 ifp->flags &= ~IFA_F_TENTATIVE;
2462 spin_unlock_bh(&ifp->lock);
2463 read_unlock_bh(&idev->lock);
2464
2465 addrconf_dad_completed(ifp);
2466 return;
2467 }
2468
6732bade 2469 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2470 spin_unlock_bh(&ifp->lock);
6732bade 2471 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2472 /*
2473 * If the defice is not ready:
2474 * - keep it tentative if it is a permanent address.
2475 * - otherwise, kill it.
2476 */
2477 in6_ifa_hold(ifp);
2478 addrconf_dad_stop(ifp);
6732bade 2479 return;
3c21edbd 2480 }
6732bade
YH		 2481 addrconf_dad_kick(ifp);
2482 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2483out:
2484 read_unlock_bh(&idev->lock);
2485}
2486
2487static void addrconf_dad_timer(unsigned long data)
2488{
2489 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2490 struct inet6_dev *idev = ifp->idev;
2491 struct in6_addr unspec;
2492 struct in6_addr mcaddr;
2493
2494 read_lock_bh(&idev->lock);
2495 if (idev->dead) {
2496 read_unlock_bh(&idev->lock);
2497 goto out;
2498 }
2499 spin_lock_bh(&ifp->lock);
2500 if (ifp->probes == 0) {
2501 /*
2502 * DAD was successful
2503 */
2504
2505 ifp->flags &= ~IFA_F_TENTATIVE;
2506 spin_unlock_bh(&ifp->lock);
2507 read_unlock_bh(&idev->lock);
2508
2509 addrconf_dad_completed(ifp);
2510
2511 goto out;
2512 }
2513
2514 ifp->probes--;
2515 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2516 spin_unlock_bh(&ifp->lock);
2517 read_unlock_bh(&idev->lock);
2518
2519 /* send a neighbour solicitation for our addr */
2520 memset(&unspec, 0, sizeof(unspec));
2521 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2522 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2523out:
2524 in6_ifa_put(ifp);
2525}
2526
2527static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2528{
2529 struct net_device * dev = ifp->idev->dev;
2530
2531 /*
2532 * Configure the address for reception. Now it is valid.
2533 */
2534
2535 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2536
2537 /* If added prefix is link local and forwarding is off,
2538 start sending router solicitations.
2539 */
2540
2541 if (ifp->idev->cnf.forwarding == 0 &&
2542 ifp->idev->cnf.rtr_solicits > 0 &&
2543 (dev->flags&IFF_LOOPBACK) == 0 &&
2544 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2545 struct in6_addr all_routers;
2546
2547 ipv6_addr_all_routers(&all_routers);
2548
2549 /*
2550 * If a host as already performed a random delay
2551 * [...] as part of DAD [...] there is no need
2552 * to delay again before sending the first RS
2553 */
2554 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2555
2556 spin_lock_bh(&ifp->lock);
2557 ifp->probes = 1;
2558 ifp->idev->if_flags |= IF_RS_SENT;
2559 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2560 spin_unlock_bh(&ifp->lock);
2561 }
2562}
2563
c5e33bdd
YH		 2564static void addrconf_dad_run(struct inet6_dev *idev) {
2565 struct inet6_ifaddr *ifp;
2566
2567 read_lock_bh(&idev->lock);
2568 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2569 spin_lock_bh(&ifp->lock);
2570 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2571 spin_unlock_bh(&ifp->lock);
2572 continue;
2573 }
2574 spin_unlock_bh(&ifp->lock);
2575 addrconf_dad_kick(ifp);
2576 }
2577 read_unlock_bh(&idev->lock);
2578}
2579
1da177e4
LT		 2580#ifdef CONFIG_PROC_FS
2581struct if6_iter_state {
2582 int bucket;
2583};
2584
2585static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2586{
2587 struct inet6_ifaddr *ifa = NULL;
2588 struct if6_iter_state *state = seq->private;
2589
2590 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2591 ifa = inet6_addr_lst[state->bucket];
2592 if (ifa)
2593 break;
2594 }
2595 return ifa;
2596}
2597
2598static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2599{
2600 struct if6_iter_state *state = seq->private;
2601
2602 ifa = ifa->lst_next;
2603try_again:
2604 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2605 ifa = inet6_addr_lst[state->bucket];
2606 goto try_again;
2607 }
2608 return ifa;
2609}
2610
2611static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2612{
2613 struct inet6_ifaddr *ifa = if6_get_first(seq);
2614
2615 if (ifa)
2616 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2617 --pos;
2618 return pos ? NULL : ifa;
2619}
2620
2621static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2622{
2623 read_lock_bh(&addrconf_hash_lock);
2624 return if6_get_idx(seq, *pos);
2625}
2626
2627static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2628{
2629 struct inet6_ifaddr *ifa;
2630
2631 ifa = if6_get_next(seq, v);
2632 ++*pos;
2633 return ifa;
2634}
2635
2636static void if6_seq_stop(struct seq_file *seq, void *v)
2637{
2638 read_unlock_bh(&addrconf_hash_lock);
2639}
2640
2641static int if6_seq_show(struct seq_file *seq, void *v)
2642{
2643 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2644 seq_printf(seq,
9343e79a 2645 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2646 NIP6(ifp->addr),
2647 ifp->idev->dev->ifindex,
2648 ifp->prefix_len,
2649 ifp->scope,
2650 ifp->flags,
2651 ifp->idev->dev->name);
2652 return 0;
2653}
2654
2655static struct seq_operations if6_seq_ops = {
2656 .start = if6_seq_start,
2657 .next = if6_seq_next,
2658 .show = if6_seq_show,
2659 .stop = if6_seq_stop,
2660};
2661
2662static int if6_seq_open(struct inode *inode, struct file *file)
2663{
2664 struct seq_file *seq;
2665 int rc = -ENOMEM;
2666 struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2667
2668 if (!s)
2669 goto out;
2670 memset(s, 0, sizeof(*s));
2671
2672 rc = seq_open(file, &if6_seq_ops);
2673 if (rc)
2674 goto out_kfree;
2675
2676 seq = file->private_data;
2677 seq->private = s;
2678out:
2679 return rc;
2680out_kfree:
2681 kfree(s);
2682 goto out;
2683}
2684
2685static struct file_operations if6_fops = {
2686 .owner = THIS_MODULE,
2687 .open = if6_seq_open,
2688 .read = seq_read,
2689 .llseek = seq_lseek,
2690 .release = seq_release_private,
2691};
2692
2693int __init if6_proc_init(void)
2694{
2695 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2696 return -ENOMEM;
2697 return 0;
2698}
2699
2700void if6_proc_exit(void)
2701{
2702 proc_net_remove("if_inet6");
2703}
2704#endif /* CONFIG_PROC_FS */
2705
2706/*
2707 * Periodic address status verification
2708 */
2709
2710static void addrconf_verify(unsigned long foo)
2711{
2712 struct inet6_ifaddr *ifp;
2713 unsigned long now, next;
2714 int i;
2715
2716 spin_lock_bh(&addrconf_verify_lock);
2717 now = jiffies;
2718 next = now + ADDR_CHECK_FREQUENCY;
2719
2720 del_timer(&addr_chk_timer);
2721
2722 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2723
2724restart:
5d5780df 2725 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2726 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2727 unsigned long age;
2728#ifdef CONFIG_IPV6_PRIVACY
2729 unsigned long regen_advance;
2730#endif
2731
2732 if (ifp->flags & IFA_F_PERMANENT)
2733 continue;
2734
2735 spin_lock(&ifp->lock);
2736 age = (now - ifp->tstamp) / HZ;
2737
2738#ifdef CONFIG_IPV6_PRIVACY
2739 regen_advance = ifp->idev->cnf.regen_max_retry *
2740 ifp->idev->cnf.dad_transmits *
2741 ifp->idev->nd_parms->retrans_time / HZ;
2742#endif
2743
2744 if (age >= ifp->valid_lft) {
2745 spin_unlock(&ifp->lock);
2746 in6_ifa_hold(ifp);
5d5780df 2747 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2748 ipv6_del_addr(ifp);
2749 goto restart;
2750 } else if (age >= ifp->prefered_lft) {
2751 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2752 int deprecate = 0;
2753
2754 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2755 deprecate = 1;
2756 ifp->flags |= IFA_F_DEPRECATED;
2757 }
2758
2759 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2760 next = ifp->tstamp + ifp->valid_lft * HZ;
2761
2762 spin_unlock(&ifp->lock);
2763
2764 if (deprecate) {
2765 in6_ifa_hold(ifp);
5d5780df 2766 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2767
2768 ipv6_ifa_notify(0, ifp);
2769 in6_ifa_put(ifp);
2770 goto restart;
2771 }
2772#ifdef CONFIG_IPV6_PRIVACY
2773 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2774 !(ifp->flags&IFA_F_TENTATIVE)) {
2775 if (age >= ifp->prefered_lft - regen_advance) {
2776 struct inet6_ifaddr *ifpub = ifp->ifpub;
2777 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2778 next = ifp->tstamp + ifp->prefered_lft * HZ;
2779 if (!ifp->regen_count && ifpub) {
2780 ifp->regen_count++;
2781 in6_ifa_hold(ifp);
2782 in6_ifa_hold(ifpub);
2783 spin_unlock(&ifp->lock);
5d5780df 2784 read_unlock(&addrconf_hash_lock);
291d809b
HY		 2785 spin_lock(&ifpub->lock);
2786 ifpub->regen_count = 0;
2787 spin_unlock(&ifpub->lock);
1da177e4
LT		 2788 ipv6_create_tempaddr(ifpub, ifp);
2789 in6_ifa_put(ifpub);
2790 in6_ifa_put(ifp);
2791 goto restart;
2792 }
2793 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2794 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2795 spin_unlock(&ifp->lock);
2796#endif
2797 } else {
2798 /* ifp->prefered_lft <= ifp->valid_lft */
2799 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2800 next = ifp->tstamp + ifp->prefered_lft * HZ;
2801 spin_unlock(&ifp->lock);
2802 }
2803 }
5d5780df 2804 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2805 }
2806
2807 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2808 add_timer(&addr_chk_timer);
2809 spin_unlock_bh(&addrconf_verify_lock);
2810}
2811
2812static int
2813inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2814{
2815 struct rtattr **rta = arg;
2816 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2817 struct in6_addr *pfx;
2818
2819 pfx = NULL;
2820 if (rta[IFA_ADDRESS-1]) {
2821 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2822 return -EINVAL;
2823 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2824 }
2825 if (rta[IFA_LOCAL-1]) {
2826 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2827 return -EINVAL;
2828 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2829 }
2830 if (pfx == NULL)
2831 return -EINVAL;
2832
2833 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2834}
2835
2836static int
2837inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2838{
2839 struct rtattr **rta = arg;
2840 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
2841 struct in6_addr *pfx;
2842
2843 pfx = NULL;
2844 if (rta[IFA_ADDRESS-1]) {
2845 if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
2846 return -EINVAL;
2847 pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
2848 }
2849 if (rta[IFA_LOCAL-1]) {
2850 if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
2851 return -EINVAL;
2852 pfx = RTA_DATA(rta[IFA_LOCAL-1]);
2853 }
2854 if (pfx == NULL)
2855 return -EINVAL;
2856
2857 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2858}
2859
2860static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 2861 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2862{
2863 struct ifaddrmsg *ifm;
2864 struct nlmsghdr *nlh;
2865 struct ifa_cacheinfo ci;
2866 unsigned char *b = skb->tail;
2867
b6544c0b 2868 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2869 ifm = NLMSG_DATA(nlh);
2870 ifm->ifa_family = AF_INET6;
2871 ifm->ifa_prefixlen = ifa->prefix_len;
2872 ifm->ifa_flags = ifa->flags;
2873 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2874 if (ifa->scope&IFA_HOST)
2875 ifm->ifa_scope = RT_SCOPE_HOST;
2876 else if (ifa->scope&IFA_LINK)
2877 ifm->ifa_scope = RT_SCOPE_LINK;
2878 else if (ifa->scope&IFA_SITE)
2879 ifm->ifa_scope = RT_SCOPE_SITE;
2880 ifm->ifa_index = ifa->idev->dev->ifindex;
2881 RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
2882 if (!(ifa->flags&IFA_F_PERMANENT)) {
2883 ci.ifa_prefered = ifa->prefered_lft;
2884 ci.ifa_valid = ifa->valid_lft;
2885 if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
2886 long tval = (jiffies - ifa->tstamp)/HZ;
2887 ci.ifa_prefered -= tval;
2888 if (ci.ifa_valid != INFINITY_LIFE_TIME)
2889 ci.ifa_valid -= tval;
2890 }
2891 } else {
2892 ci.ifa_prefered = INFINITY_LIFE_TIME;
2893 ci.ifa_valid = INFINITY_LIFE_TIME;
2894 }
2895 ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
2896 + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2897 ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
2898 + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
2899 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2900 nlh->nlmsg_len = skb->tail - b;
2901 return skb->len;
2902
2903nlmsg_failure:
2904rtattr_failure:
2905 skb_trim(skb, b - skb->data);
2906 return -1;
2907}
2908
2909static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 2910 u32 pid, u32 seq, int event, u16 flags)
1da177e4
LT		 2911{
2912 struct ifaddrmsg *ifm;
2913 struct nlmsghdr *nlh;
2914 struct ifa_cacheinfo ci;
2915 unsigned char *b = skb->tail;
2916
b6544c0b 2917 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2918 ifm = NLMSG_DATA(nlh);
2919 ifm->ifa_family = AF_INET6;
2920 ifm->ifa_prefixlen = 128;
2921 ifm->ifa_flags = IFA_F_PERMANENT;
2922 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2923 if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
2924 ifm->ifa_scope = RT_SCOPE_SITE;
2925 ifm->ifa_index = ifmca->idev->dev->ifindex;
2926 RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
2927 ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
2928 * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
2929 * 100 / HZ);
2930 ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
2931 * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
2932 * 100 / HZ);
2933 ci.ifa_prefered = INFINITY_LIFE_TIME;
2934 ci.ifa_valid = INFINITY_LIFE_TIME;
2935 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2936 nlh->nlmsg_len = skb->tail - b;
2937 return skb->len;
2938
2939nlmsg_failure:
2940rtattr_failure:
2941 skb_trim(skb, b - skb->data);
2942 return -1;
2943}
2944
2945static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 2946 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 2947{
2948 struct ifaddrmsg *ifm;
2949 struct nlmsghdr *nlh;
2950 struct ifa_cacheinfo ci;
2951 unsigned char *b = skb->tail;
2952
b6544c0b 2953 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 2954 ifm = NLMSG_DATA(nlh);
2955 ifm->ifa_family = AF_INET6;
2956 ifm->ifa_prefixlen = 128;
2957 ifm->ifa_flags = IFA_F_PERMANENT;
2958 ifm->ifa_scope = RT_SCOPE_UNIVERSE;
2959 if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
2960 ifm->ifa_scope = RT_SCOPE_SITE;
2961 ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
2962 RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
2963 ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
2964 * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
2965 * 100 / HZ);
2966 ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
2967 * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
2968 * 100 / HZ);
2969 ci.ifa_prefered = INFINITY_LIFE_TIME;
2970 ci.ifa_valid = INFINITY_LIFE_TIME;
2971 RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
2972 nlh->nlmsg_len = skb->tail - b;
2973 return skb->len;
2974
2975nlmsg_failure:
2976rtattr_failure:
2977 skb_trim(skb, b - skb->data);
2978 return -1;
2979}
2980
2981enum addr_type_t
2982{
2983 UNICAST_ADDR,
2984 MULTICAST_ADDR,
2985 ANYCAST_ADDR,
2986};
2987
2988static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
2989 enum addr_type_t type)
2990{
2991 int idx, ip_idx;
2992 int s_idx, s_ip_idx;
2993 int err = 1;
2994 struct net_device *dev;
2995 struct inet6_dev *idev = NULL;
2996 struct inet6_ifaddr *ifa;
2997 struct ifmcaddr6 *ifmca;
2998 struct ifacaddr6 *ifaca;
2999
3000 s_idx = cb->args[0];
3001 s_ip_idx = ip_idx = cb->args[1];
3002 read_lock(&dev_base_lock);
3003
3004 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3005 if (idx < s_idx)
3006 continue;
3007 if (idx > s_idx)
3008 s_ip_idx = 0;
3009 ip_idx = 0;
3010 if ((idev = in6_dev_get(dev)) == NULL)
3011 continue;
3012 read_lock_bh(&idev->lock);
3013 switch (type) {
3014 case UNICAST_ADDR:
ae9cda5d 3015 /* unicast address incl. temp addr */
1da177e4
LT		 3016 for (ifa = idev->addr_list; ifa;
3017 ifa = ifa->if_next, ip_idx++) {
3018 if (ip_idx < s_ip_idx)
3019 continue;
3020 if ((err = inet6_fill_ifaddr(skb, ifa,
3021 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3022 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3023 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3024 goto done;
3025 }
1da177e4
LT		 3026 break;
3027 case MULTICAST_ADDR:
3028 /* multicast address */
3029 for (ifmca = idev->mc_list; ifmca;
3030 ifmca = ifmca->next, ip_idx++) {
3031 if (ip_idx < s_ip_idx)
3032 continue;
3033 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3034 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3035 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3036 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3037 goto done;
3038 }
3039 break;
3040 case ANYCAST_ADDR:
3041 /* anycast address */
3042 for (ifaca = idev->ac_list; ifaca;
3043 ifaca = ifaca->aca_next, ip_idx++) {
3044 if (ip_idx < s_ip_idx)
3045 continue;
3046 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3047 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3048 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3049 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3050 goto done;
3051 }
3052 break;
3053 default:
3054 break;
3055 }
3056 read_unlock_bh(&idev->lock);
3057 in6_dev_put(idev);
3058 }
3059done:
3060 if (err <= 0) {
3061 read_unlock_bh(&idev->lock);
3062 in6_dev_put(idev);
3063 }
3064 read_unlock(&dev_base_lock);
3065 cb->args[0] = idx;
3066 cb->args[1] = ip_idx;
3067 return skb->len;
3068}
3069
3070static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3071{
3072 enum addr_type_t type = UNICAST_ADDR;
3073 return inet6_dump_addr(skb, cb, type);
3074}
3075
3076static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3077{
3078 enum addr_type_t type = MULTICAST_ADDR;
3079 return inet6_dump_addr(skb, cb, type);
3080}
3081
3082
3083static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3084{
3085 enum addr_type_t type = ANYCAST_ADDR;
3086 return inet6_dump_addr(skb, cb, type);
3087}
3088
3089static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3090{
3091 struct sk_buff *skb;
3092 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
3093
3094 skb = alloc_skb(size, GFP_ATOMIC);
3095 if (!skb) {
ac6d439d 3096 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
1da177e4
LT		 3097 return;
3098 }
9ed19f33 3099 if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
1da177e4 3100 kfree_skb(skb);
ac6d439d 3101 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
1da177e4
LT		 3102 return;
3103 }
ac6d439d
PM		 3104 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
3105 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
1da177e4
LT		 3106}
3107
3108static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3109 __s32 *array, int bytes)
3110{
3111 memset(array, 0, bytes);
3112 array[DEVCONF_FORWARDING] = cnf->forwarding;
3113 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3114 array[DEVCONF_MTU6] = cnf->mtu6;
3115 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3116 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3117 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3118 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3119 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3120 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3121 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3122 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3123#ifdef CONFIG_IPV6_PRIVACY
3124 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3125 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3126 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3127 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3128 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3129#endif
3130 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3131 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3132 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3133#ifdef CONFIG_IPV6_ROUTER_PREF
3134 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3135 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
930d6ff2 3136#endif
1da177e4
LT		 3137}
3138
3139static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3140 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 3141{
3142 struct net_device *dev = idev->dev;
3143 __s32 *array = NULL;
3144 struct ifinfomsg *r;
3145 struct nlmsghdr *nlh;
3146 unsigned char *b = skb->tail;
3147 struct rtattr *subattr;
3148 __u32 mtu = dev->mtu;
3149 struct ifla_cacheinfo ci;
3150
b6544c0b 3151 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
1da177e4
LT		 3152 r = NLMSG_DATA(nlh);
3153 r->ifi_family = AF_INET6;
9ef1d4c7 3154 r->__ifi_pad = 0;
1da177e4
LT		 3155 r->ifi_type = dev->type;
3156 r->ifi_index = dev->ifindex;
3157 r->ifi_flags = dev_get_flags(dev);
3158 r->ifi_change = 0;
3159
3160 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
3161
3162 if (dev->addr_len)
3163 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3164
3165 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
3166 if (dev->ifindex != dev->iflink)
3167 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
3168
3169 subattr = (struct rtattr*)skb->tail;
3170
3171 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
3172
3173 /* return the device flags */
3174 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
3175
3176 /* return interface cacheinfo */
3177 ci.max_reasm_len = IPV6_MAXPLEN;
3178 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3179 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3180 ci.reachable_time = idev->nd_parms->reachable_time;
3181 ci.retrans_time = idev->nd_parms->retrans_time;
3182 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3183
3184 /* return the device sysctl params */
3185 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
3186 goto rtattr_failure;
3187 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
3188 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
3189
3190 /* XXX - Statistics/MC not implemented */
3191 subattr->rta_len = skb->tail - (u8*)subattr;
3192
3193 nlh->nlmsg_len = skb->tail - b;
3194 kfree(array);
3195 return skb->len;
3196
3197nlmsg_failure:
3198rtattr_failure:
a51482bd 3199 kfree(array);
1da177e4
LT		 3200 skb_trim(skb, b - skb->data);
3201 return -1;
3202}
3203
3204static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3205{
3206 int idx, err;
3207 int s_idx = cb->args[0];
3208 struct net_device *dev;
3209 struct inet6_dev *idev;
3210
3211 read_lock(&dev_base_lock);
3212 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3213 if (idx < s_idx)
3214 continue;
3215 if ((idev = in6_dev_get(dev)) == NULL)
3216 continue;
3217 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3218 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3219 in6_dev_put(idev);
3220 if (err <= 0)
3221 break;
3222 }
3223 read_unlock(&dev_base_lock);
3224 cb->args[0] = idx;
3225
3226 return skb->len;
3227}
3228
3229void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3230{
3231 struct sk_buff *skb;
3232 /* 128 bytes ?? */
3233 int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
3234
3235 skb = alloc_skb(size, GFP_ATOMIC);
3236 if (!skb) {
ac6d439d 3237 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
1da177e4
LT		 3238 return;
3239 }
9ed19f33 3240 if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
1da177e4 3241 kfree_skb(skb);
ac6d439d 3242 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
1da177e4
LT		 3243 return;
3244 }
ac6d439d
PM		 3245 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
3246 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
1da177e4
LT		 3247}
3248
3249static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b
JHS		 3250 struct prefix_info *pinfo, u32 pid, u32 seq,
3251 int event, unsigned int flags)
1da177e4
LT		 3252{
3253 struct prefixmsg *pmsg;
3254 struct nlmsghdr *nlh;
3255 unsigned char *b = skb->tail;
3256 struct prefix_cacheinfo ci;
3257
b6544c0b 3258 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
1da177e4
LT		 3259 pmsg = NLMSG_DATA(nlh);
3260 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3261 pmsg->prefix_pad1 = 0;
3262 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3263 pmsg->prefix_ifindex = idev->dev->ifindex;
3264 pmsg->prefix_len = pinfo->prefix_len;
3265 pmsg->prefix_type = pinfo->type;
8a47077a 3266 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3267
3268 pmsg->prefix_flags = 0;
3269 if (pinfo->onlink)
3270 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3271 if (pinfo->autoconf)
3272 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3273
3274 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3275
3276 ci.preferred_time = ntohl(pinfo->prefered);
3277 ci.valid_time = ntohl(pinfo->valid);
3278 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3279
3280 nlh->nlmsg_len = skb->tail - b;
3281 return skb->len;
3282
3283nlmsg_failure:
3284rtattr_failure:
3285 skb_trim(skb, b - skb->data);
3286 return -1;
3287}
3288
3289static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3290 struct prefix_info *pinfo)
3291{
3292 struct sk_buff *skb;
3293 int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
3294
3295 skb = alloc_skb(size, GFP_ATOMIC);
3296 if (!skb) {
ac6d439d 3297 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
1da177e4
LT		 3298 return;
3299 }
9ed19f33 3300 if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
1da177e4 3301 kfree_skb(skb);
ac6d439d 3302 netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
1da177e4
LT		 3303 return;
3304 }
ac6d439d
PM		 3305 NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
3306 netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
1da177e4
LT		 3307}
3308
db46edc6 3309static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
1da177e4
LT		 3310 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3311 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3312 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
3313 [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
3314 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3315 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3316 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3317 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3318 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3319 .dumpit = inet6_dump_fib, },
3320};
3321
3322static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3323{
3324 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3325
3326 switch (event) {
3327 case RTM_NEWADDR:
4641e7a3 3328 ip6_ins_rt(ifp->rt, NULL, NULL, NULL);
1da177e4
LT		 3329 if (ifp->idev->cnf.forwarding)
3330 addrconf_join_anycast(ifp);
3331 break;
3332 case RTM_DELADDR:
3333 if (ifp->idev->cnf.forwarding)
3334 addrconf_leave_anycast(ifp);
3335 addrconf_leave_solict(ifp->idev, &ifp->addr);
3336 dst_hold(&ifp->rt->u.dst);
0d51aa80 3337 if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
1da177e4 3338 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3339 break;
3340 }
3341}
3342
3343static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3344{
3345 read_lock_bh(&addrconf_lock);
3346 if (likely(ifp->idev->dead == 0))
3347 __ipv6_ifa_notify(event, ifp);
3348 read_unlock_bh(&addrconf_lock);
3349}
3350
3351#ifdef CONFIG_SYSCTL
3352
3353static
3354int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3355 void __user *buffer, size_t *lenp, loff_t *ppos)
3356{
3357 int *valp = ctl->data;
3358 int val = *valp;
3359 int ret;
3360
3361 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3362
3363 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3364 if (valp != &ipv6_devconf.forwarding) {
3365 if ((!*valp) ^ (!val)) {
3366 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3367 if (idev == NULL)
3368 return ret;
3369 dev_forward_change(idev);
3370 }
3371 } else {
3372 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3373 addrconf_forward_change();
3374 }
3375 if (*valp)
3376 rt6_purge_dflt_routers();
3377 }
3378
3379 return ret;
3380}
3381
3382static int addrconf_sysctl_forward_strategy(ctl_table *table,
3383 int __user *name, int nlen,
3384 void __user *oldval,
3385 size_t __user *oldlenp,
3386 void __user *newval, size_t newlen,
3387 void **context)
3388{
3389 int *valp = table->data;
3390 int new;
3391
3392 if (!newval || !newlen)
3393 return 0;
3394 if (newlen != sizeof(int))
3395 return -EINVAL;
3396 if (get_user(new, (int __user *)newval))
3397 return -EFAULT;
3398 if (new == *valp)
3399 return 0;
3400 if (oldval && oldlenp) {
3401 size_t len;
3402 if (get_user(len, oldlenp))
3403 return -EFAULT;
3404 if (len) {
3405 if (len > table->maxlen)
3406 len = table->maxlen;
3407 if (copy_to_user(oldval, valp, len))
3408 return -EFAULT;
3409 if (put_user(len, oldlenp))
3410 return -EFAULT;
3411 }
3412 }
3413
3414 if (valp != &ipv6_devconf_dflt.forwarding) {
3415 if (valp != &ipv6_devconf.forwarding) {
3416 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3417 int changed;
3418 if (unlikely(idev == NULL))
3419 return -ENODEV;
3420 changed = (!*valp) ^ (!new);
3421 *valp = new;
3422 if (changed)
3423 dev_forward_change(idev);
3424 } else {
3425 *valp = new;
3426 addrconf_forward_change();
3427 }
3428
3429 if (*valp)
3430 rt6_purge_dflt_routers();
3431 } else
3432 *valp = new;
3433
3434 return 1;
3435}
3436
3437static struct addrconf_sysctl_table
3438{
3439 struct ctl_table_header *sysctl_header;
3440 ctl_table addrconf_vars[__NET_IPV6_MAX];
3441 ctl_table addrconf_dev[2];
3442 ctl_table addrconf_conf_dir[2];
3443 ctl_table addrconf_proto_dir[2];
3444 ctl_table addrconf_root_dir[2];
3445} addrconf_sysctl = {
3446 .sysctl_header = NULL,
3447 .addrconf_vars = {
3448 {
3449 .ctl_name = NET_IPV6_FORWARDING,
3450 .procname = "forwarding",
3451 .data = &ipv6_devconf.forwarding,
3452 .maxlen = sizeof(int),
3453 .mode = 0644,
3454 .proc_handler = &addrconf_sysctl_forward,
3455 .strategy = &addrconf_sysctl_forward_strategy,
3456 },
3457 {
3458 .ctl_name = NET_IPV6_HOP_LIMIT,
3459 .procname = "hop_limit",
3460 .data = &ipv6_devconf.hop_limit,
3461 .maxlen = sizeof(int),
3462 .mode = 0644,
3463 .proc_handler = proc_dointvec,
3464 },
3465 {
3466 .ctl_name = NET_IPV6_MTU,
3467 .procname = "mtu",
3468 .data = &ipv6_devconf.mtu6,
3469 .maxlen = sizeof(int),
3470 .mode = 0644,
3471 .proc_handler = &proc_dointvec,
3472 },
3473 {
3474 .ctl_name = NET_IPV6_ACCEPT_RA,
3475 .procname = "accept_ra",
3476 .data = &ipv6_devconf.accept_ra,
3477 .maxlen = sizeof(int),
3478 .mode = 0644,
3479 .proc_handler = &proc_dointvec,
3480 },
3481 {
3482 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3483 .procname = "accept_redirects",
3484 .data = &ipv6_devconf.accept_redirects,
3485 .maxlen = sizeof(int),
3486 .mode = 0644,
3487 .proc_handler = &proc_dointvec,
3488 },
3489 {
3490 .ctl_name = NET_IPV6_AUTOCONF,
3491 .procname = "autoconf",
3492 .data = &ipv6_devconf.autoconf,
3493 .maxlen = sizeof(int),
3494 .mode = 0644,
3495 .proc_handler = &proc_dointvec,
3496 },
3497 {
3498 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3499 .procname = "dad_transmits",
3500 .data = &ipv6_devconf.dad_transmits,
3501 .maxlen = sizeof(int),
3502 .mode = 0644,
3503 .proc_handler = &proc_dointvec,
3504 },
3505 {
3506 .ctl_name = NET_IPV6_RTR_SOLICITS,
3507 .procname = "router_solicitations",
3508 .data = &ipv6_devconf.rtr_solicits,
3509 .maxlen = sizeof(int),
3510 .mode = 0644,
3511 .proc_handler = &proc_dointvec,
3512 },
3513 {
3514 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3515 .procname = "router_solicitation_interval",
3516 .data = &ipv6_devconf.rtr_solicit_interval,
3517 .maxlen = sizeof(int),
3518 .mode = 0644,
3519 .proc_handler = &proc_dointvec_jiffies,
3520 .strategy = &sysctl_jiffies,
3521 },
3522 {
3523 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3524 .procname = "router_solicitation_delay",
3525 .data = &ipv6_devconf.rtr_solicit_delay,
3526 .maxlen = sizeof(int),
3527 .mode = 0644,
3528 .proc_handler = &proc_dointvec_jiffies,
3529 .strategy = &sysctl_jiffies,
3530 },
3531 {
3532 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3533 .procname = "force_mld_version",
3534 .data = &ipv6_devconf.force_mld_version,
3535 .maxlen = sizeof(int),
3536 .mode = 0644,
3537 .proc_handler = &proc_dointvec,
3538 },
3539#ifdef CONFIG_IPV6_PRIVACY
3540 {
3541 .ctl_name = NET_IPV6_USE_TEMPADDR,
3542 .procname = "use_tempaddr",
3543 .data = &ipv6_devconf.use_tempaddr,
3544 .maxlen = sizeof(int),
3545 .mode = 0644,
3546 .proc_handler = &proc_dointvec,
3547 },
3548 {
3549 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3550 .procname = "temp_valid_lft",
3551 .data = &ipv6_devconf.temp_valid_lft,
3552 .maxlen = sizeof(int),
3553 .mode = 0644,
3554 .proc_handler = &proc_dointvec,
3555 },
3556 {
3557 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3558 .procname = "temp_prefered_lft",
3559 .data = &ipv6_devconf.temp_prefered_lft,
3560 .maxlen = sizeof(int),
3561 .mode = 0644,
3562 .proc_handler = &proc_dointvec,
3563 },
3564 {
3565 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3566 .procname = "regen_max_retry",
3567 .data = &ipv6_devconf.regen_max_retry,
3568 .maxlen = sizeof(int),
3569 .mode = 0644,
3570 .proc_handler = &proc_dointvec,
3571 },
3572 {
3573 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3574 .procname = "max_desync_factor",
3575 .data = &ipv6_devconf.max_desync_factor,
3576 .maxlen = sizeof(int),
3577 .mode = 0644,
3578 .proc_handler = &proc_dointvec,
3579 },
3580#endif
3581 {
3582 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3583 .procname = "max_addresses",
3584 .data = &ipv6_devconf.max_addresses,
3585 .maxlen = sizeof(int),
3586 .mode = 0644,
3587 .proc_handler = &proc_dointvec,
3588 },
65f5c7c1
YH		 3589 {
3590 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3591 .procname = "accept_ra_defrtr",
3592 .data = &ipv6_devconf.accept_ra_defrtr,
3593 .maxlen = sizeof(int),
3594 .mode = 0644,
3595 .proc_handler = &proc_dointvec,
3596 },
c4fd30eb
YH		 3597 {
3598 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3599 .procname = "accept_ra_pinfo",
3600 .data = &ipv6_devconf.accept_ra_pinfo,
3601 .maxlen = sizeof(int),
3602 .mode = 0644,
3603 .proc_handler = &proc_dointvec,
3604 },
930d6ff2
YH		 3605#ifdef CONFIG_IPV6_ROUTER_PREF
3606 {
3607 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3608 .procname = "accept_ra_rtr_pref",
3609 .data = &ipv6_devconf.accept_ra_rtr_pref,
3610 .maxlen = sizeof(int),
3611 .mode = 0644,
3612 .proc_handler = &proc_dointvec,
3613 },
52e16356
YH		 3614 {
3615 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3616 .procname = "router_probe_interval",
3617 .data = &ipv6_devconf.rtr_probe_interval,
3618 .maxlen = sizeof(int),
3619 .mode = 0644,
3620 .proc_handler = &proc_dointvec_jiffies,
3621 .strategy = &sysctl_jiffies,
3622 },
930d6ff2 3623#endif
1da177e4
LT		 3624 {
3625 .ctl_name = 0, /* sentinel */
3626 }
3627 },
3628 .addrconf_dev = {
3629 {
3630 .ctl_name = NET_PROTO_CONF_ALL,
3631 .procname = "all",
3632 .mode = 0555,
3633 .child = addrconf_sysctl.addrconf_vars,
3634 },
3635 {
3636 .ctl_name = 0, /* sentinel */
3637 }
3638 },
3639 .addrconf_conf_dir = {
3640 {
3641 .ctl_name = NET_IPV6_CONF,
3642 .procname = "conf",
3643 .mode = 0555,
3644 .child = addrconf_sysctl.addrconf_dev,
3645 },
3646 {
3647 .ctl_name = 0, /* sentinel */
3648 }
3649 },
3650 .addrconf_proto_dir = {
3651 {
3652 .ctl_name = NET_IPV6,
3653 .procname = "ipv6",
3654 .mode = 0555,
3655 .child = addrconf_sysctl.addrconf_conf_dir,
3656 },
3657 {
3658 .ctl_name = 0, /* sentinel */
3659 }
3660 },
3661 .addrconf_root_dir = {
3662 {
3663 .ctl_name = CTL_NET,
3664 .procname = "net",
3665 .mode = 0555,
3666 .child = addrconf_sysctl.addrconf_proto_dir,
3667 },
3668 {
3669 .ctl_name = 0, /* sentinel */
3670 }
3671 },
3672};
3673
3674static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3675{
3676 int i;
3677 struct net_device *dev = idev ? idev->dev : NULL;
3678 struct addrconf_sysctl_table *t;
3679 char *dev_name = NULL;
3680
3681 t = kmalloc(sizeof(*t), GFP_KERNEL);
3682 if (t == NULL)
3683 return;
3684 memcpy(t, &addrconf_sysctl, sizeof(*t));
3685 for (i=0; t->addrconf_vars[i].data; i++) {
3686 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3687 t->addrconf_vars[i].de = NULL;
3688 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3689 }
3690 if (dev) {
3691 dev_name = dev->name;
3692 t->addrconf_dev[0].ctl_name = dev->ifindex;
3693 } else {
3694 dev_name = "default";
3695 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3696 }
3697
3698 /*
3699 * Make a copy of dev_name, because '.procname' is regarded as const
3700 * by sysctl and we wouldn't want anyone to change it under our feet
3701 * (see SIOCSIFNAME).
3702 */
543537bd 3703 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 3704 if (!dev_name)
3705 goto free;
3706
3707 t->addrconf_dev[0].procname = dev_name;
3708
3709 t->addrconf_dev[0].child = t->addrconf_vars;
3710 t->addrconf_dev[0].de = NULL;
3711 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3712 t->addrconf_conf_dir[0].de = NULL;
3713 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3714 t->addrconf_proto_dir[0].de = NULL;
3715 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3716 t->addrconf_root_dir[0].de = NULL;
3717
3718 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3719 if (t->sysctl_header == NULL)
3720 goto free_procname;
3721 else
3722 p->sysctl = t;
3723 return;
3724
3725 /* error path */
3726 free_procname:
3727 kfree(dev_name);
3728 free:
3729 kfree(t);
3730
3731 return;
3732}
3733
3734static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3735{
3736 if (p->sysctl) {
3737 struct addrconf_sysctl_table *t = p->sysctl;
3738 p->sysctl = NULL;
3739 unregister_sysctl_table(t->sysctl_header);
3740 kfree(t->addrconf_dev[0].procname);
3741 kfree(t);
3742 }
3743}
3744
3745
3746#endif
3747
3748/*
3749 * Device notifier
3750 */
3751
3752int register_inet6addr_notifier(struct notifier_block *nb)
3753{
3754 return notifier_chain_register(&inet6addr_chain, nb);
3755}
3756
3757int unregister_inet6addr_notifier(struct notifier_block *nb)
3758{
3759 return notifier_chain_unregister(&inet6addr_chain,nb);
3760}
3761
3762/*
3763 * Init / cleanup code
3764 */
3765
3766int __init addrconf_init(void)
3767{
3768 int err = 0;
3769
3770 /* The addrconf netdev notifier requires that loopback_dev
3771 * has it's ipv6 private information allocated and setup
3772 * before it can bring up and give link-local addresses
3773 * to other devices which are up.
3774 *
3775 * Unfortunately, loopback_dev is not necessarily the first
3776 * entry in the global dev_base list of net devices. In fact,
3777 * it is likely to be the very last entry on that list.
3778 * So this causes the notifier registry below to try and
3779 * give link-local addresses to all devices besides loopback_dev
3780 * first, then loopback_dev, which cases all the non-loopback_dev
3781 * devices to fail to get a link-local address.
3782 *
3783 * So, as a temporary fix, allocate the ipv6 structure for
3784 * loopback_dev first by hand.
3785 * Longer term, all of the dependencies ipv6 has upon the loopback
3786 * device and it being up should be removed.
3787 */
3788 rtnl_lock();
3789 if (!ipv6_add_dev(&loopback_dev))
3790 err = -ENOMEM;
3791 rtnl_unlock();
3792 if (err)
3793 return err;
3794
c62dba90
HX		 3795 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
3796
1da177e4
LT		 3797 register_netdevice_notifier(&ipv6_dev_notf);
3798
1da177e4
LT		 3799 addrconf_verify(0);
3800 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3801#ifdef CONFIG_SYSCTL
3802 addrconf_sysctl.sysctl_header =
3803 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
3804 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
3805#endif
3806
3807 return 0;
3808}
3809
3810void __exit addrconf_cleanup(void)
3811{
3812 struct net_device *dev;
3813 struct inet6_dev *idev;
3814 struct inet6_ifaddr *ifa;
3815 int i;
3816
3817 unregister_netdevice_notifier(&ipv6_dev_notf);
3818
3819 rtnetlink_links[PF_INET6] = NULL;
3820#ifdef CONFIG_SYSCTL
3821 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
3822 addrconf_sysctl_unregister(&ipv6_devconf);
3823#endif
3824
3825 rtnl_lock();
3826
3827 /*
3828 * clean dev list.
3829 */
3830
3831 for (dev=dev_base; dev; dev=dev->next) {
3832 if ((idev = __in6_dev_get(dev)) == NULL)
3833 continue;
3834 addrconf_ifdown(dev, 1);
3835 }
3836 addrconf_ifdown(&loopback_dev, 2);
3837
3838 /*
3839 * Check hash table.
3840 */
3841
3842 write_lock_bh(&addrconf_hash_lock);
3843 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3844 for (ifa=inet6_addr_lst[i]; ifa; ) {
3845 struct inet6_ifaddr *bifa;
3846
3847 bifa = ifa;
3848 ifa = ifa->lst_next;
3849 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
3850 /* Do not free it; something is wrong.
3851 Now we can investigate it with debugger.
3852 */
3853 }
3854 }
3855 write_unlock_bh(&addrconf_hash_lock);
3856
3857 del_timer(&addr_chk_timer);
3858
3859 rtnl_unlock();
3860
1da177e4
LT		 3861#ifdef CONFIG_PROC_FS
3862 proc_net_remove("if_inet6");
3863#endif
3864}
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