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[IPV6] NDISC: Fix is_router flag setting.
[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
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
47#include <linux/sched.h>
48#include <linux/net.h>
49#include <linux/in6.h>
50#include <linux/netdevice.h>
1823730f 51#include <linux/if_addr.h>
1da177e4
LT		 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>
5d620266 76#include <net/netlink.h>
1da177e4
LT		 77#include <linux/if_tunnel.h>
78#include <linux/rtnetlink.h>
79
80#ifdef CONFIG_IPV6_PRIVACY
81#include <linux/random.h>
1da177e4
LT		 82#endif
83
84#include <asm/uaccess.h>
85
86#include <linux/proc_fs.h>
87#include <linux/seq_file.h>
88
89/* Set to 3 to get tracing... */
90#define ACONF_DEBUG 2
91
92#if ACONF_DEBUG >= 3
93#define ADBG(x) printk x
94#else
95#define ADBG(x)
96#endif
97
98#define INFINITY_LIFE_TIME 0xFFFFFFFF
99#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
100
101#ifdef CONFIG_SYSCTL
102static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
103static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
104#endif
105
106#ifdef CONFIG_IPV6_PRIVACY
107static int __ipv6_regen_rndid(struct inet6_dev *idev);
108static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
109static void ipv6_regen_rndid(unsigned long data);
110
111static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 112#endif
113
114static int ipv6_count_addresses(struct inet6_dev *idev);
115
116/*
117 * Configured unicast address hash table
118 */
119static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
120static DEFINE_RWLOCK(addrconf_hash_lock);
121
1da177e4
LT		 122static void addrconf_verify(unsigned long);
123
8d06afab 124static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 125static DEFINE_SPINLOCK(addrconf_verify_lock);
126
127static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
128static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
129
130static int addrconf_ifdown(struct net_device *dev, int how);
131
e431b8c0 132static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 133static void addrconf_dad_timer(unsigned long data);
134static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 135static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 136static void addrconf_rs_timer(unsigned long data);
137static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
138static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
139
140static void inet6_prefix_notify(int event, struct inet6_dev *idev,
141 struct prefix_info *pinfo);
142static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
143
e041c683 144static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 145
ab32ea5d 146struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 147 .forwarding = 0,
148 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
149 .mtu6 = IPV6_MIN_MTU,
150 .accept_ra = 1,
151 .accept_redirects = 1,
152 .autoconf = 1,
153 .force_mld_version = 0,
154 .dad_transmits = 1,
155 .rtr_solicits = MAX_RTR_SOLICITATIONS,
156 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
157 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
158#ifdef CONFIG_IPV6_PRIVACY
159 .use_tempaddr = 0,
160 .temp_valid_lft = TEMP_VALID_LIFETIME,
161 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
162 .regen_max_retry = REGEN_MAX_RETRY,
163 .max_desync_factor = MAX_DESYNC_FACTOR,
164#endif
165 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 166 .accept_ra_defrtr = 1,
c4fd30eb 167 .accept_ra_pinfo = 1,
930d6ff2
YH		 168#ifdef CONFIG_IPV6_ROUTER_PREF
169 .accept_ra_rtr_pref = 1,
52e16356 170 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 171#ifdef CONFIG_IPV6_ROUTE_INFO
172 .accept_ra_rt_info_max_plen = 0,
173#endif
930d6ff2 174#endif
fbea49e1 175 .proxy_ndp = 0,
1da177e4
LT		 176};
177
ab32ea5d 178static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 179 .forwarding = 0,
180 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
181 .mtu6 = IPV6_MIN_MTU,
182 .accept_ra = 1,
183 .accept_redirects = 1,
184 .autoconf = 1,
185 .dad_transmits = 1,
186 .rtr_solicits = MAX_RTR_SOLICITATIONS,
187 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
188 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
189#ifdef CONFIG_IPV6_PRIVACY
190 .use_tempaddr = 0,
191 .temp_valid_lft = TEMP_VALID_LIFETIME,
192 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
193 .regen_max_retry = REGEN_MAX_RETRY,
194 .max_desync_factor = MAX_DESYNC_FACTOR,
195#endif
196 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 197 .accept_ra_defrtr = 1,
c4fd30eb 198 .accept_ra_pinfo = 1,
930d6ff2
YH		 199#ifdef CONFIG_IPV6_ROUTER_PREF
200 .accept_ra_rtr_pref = 1,
52e16356 201 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 202#ifdef CONFIG_IPV6_ROUTE_INFO
203 .accept_ra_rt_info_max_plen = 0,
204#endif
930d6ff2 205#endif
fbea49e1 206 .proxy_ndp = 0,
1da177e4
LT		 207};
208
209/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
210#if 0
211const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
212#endif
213const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
214
b1cacb68
YH		 215#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
216
217static inline unsigned ipv6_addr_scope2type(unsigned scope)
218{
219 switch(scope) {
220 case IPV6_ADDR_SCOPE_NODELOCAL:
221 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
222 IPV6_ADDR_LOOPBACK);
223 case IPV6_ADDR_SCOPE_LINKLOCAL:
224 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
225 IPV6_ADDR_LINKLOCAL);
226 case IPV6_ADDR_SCOPE_SITELOCAL:
227 return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
228 IPV6_ADDR_SITELOCAL);
229 }
230 return IPV6_ADDR_SCOPE_TYPE(scope);
231}
232
233int __ipv6_addr_type(const struct in6_addr *addr)
1da177e4 234{
1da177e4
LT		 235 u32 st;
236
237 st = addr->s6_addr32[0];
238
1da177e4 239 /* Consider all addresses with the first three bits different of
b1cacb68 240 000 and 111 as unicasts.
1da177e4
LT		 241 */
242 if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
243 (st & htonl(0xE0000000)) != htonl(0xE0000000))
b1cacb68
YH		 244 return (IPV6_ADDR_UNICAST |
245 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
1da177e4 246
b1cacb68
YH		 247 if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
248 /* multicast */
249 /* addr-select 3.1 */
250 return (IPV6_ADDR_MULTICAST |
251 ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
252 }
253
254 if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
255 return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
256 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
1da177e4 257 if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
b1cacb68
YH		 258 return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
259 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
1da177e4
LT		 260
261 if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
262 if (addr->s6_addr32[2] == 0) {
263 if (addr->s6_addr32[3] == 0)
264 return IPV6_ADDR_ANY;
265
266 if (addr->s6_addr32[3] == htonl(0x00000001))
b1cacb68
YH		 267 return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
268 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
1da177e4 269
b1cacb68
YH		 270 return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
271 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 272 }
273
274 if (addr->s6_addr32[2] == htonl(0x0000ffff))
b1cacb68
YH		 275 return (IPV6_ADDR_MAPPED |
276 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
1da177e4
LT		 277 }
278
b1cacb68
YH		 279 return (IPV6_ADDR_RESERVED |
280 IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
1da177e4
LT		 281}
282
283static void addrconf_del_timer(struct inet6_ifaddr *ifp)
284{
285 if (del_timer(&ifp->timer))
286 __in6_ifa_put(ifp);
287}
288
289enum addrconf_timer_t
290{
291 AC_NONE,
292 AC_DAD,
293 AC_RS,
294};
295
296static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
297 enum addrconf_timer_t what,
298 unsigned long when)
299{
300 if (!del_timer(&ifp->timer))
301 in6_ifa_hold(ifp);
302
303 switch (what) {
304 case AC_DAD:
305 ifp->timer.function = addrconf_dad_timer;
306 break;
307 case AC_RS:
308 ifp->timer.function = addrconf_rs_timer;
309 break;
310 default:;
311 }
312 ifp->timer.expires = jiffies + when;
313 add_timer(&ifp->timer);
314}
315
316/* Nobody refers to this device, we may destroy it. */
317
8814c4b5
YH		 318static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
319{
320 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
321 kfree(idev);
322}
323
1da177e4
LT		 324void in6_dev_finish_destroy(struct inet6_dev *idev)
325{
326 struct net_device *dev = idev->dev;
327 BUG_TRAP(idev->addr_list==NULL);
328 BUG_TRAP(idev->mc_list==NULL);
329#ifdef NET_REFCNT_DEBUG
330 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
331#endif
332 dev_put(dev);
333 if (!idev->dead) {
334 printk("Freeing alive inet6 device %p\n", idev);
335 return;
336 }
337 snmp6_free_dev(idev);
8814c4b5 338 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 339}
340
341static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
342{
343 struct inet6_dev *ndev;
344
345 ASSERT_RTNL();
346
347 if (dev->mtu < IPV6_MIN_MTU)
348 return NULL;
349
322f74a4
IO		 350 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
351
352 if (ndev == NULL)
353 return NULL;
354
355 rwlock_init(&ndev->lock);
356 ndev->dev = dev;
357 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
358 ndev->cnf.mtu6 = dev->mtu;
359 ndev->cnf.sysctl = NULL;
360 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
361 if (ndev->nd_parms == NULL) {
362 kfree(ndev);
363 return NULL;
364 }
365 /* We refer to the device */
366 dev_hold(dev);
1da177e4 367
322f74a4
IO		 368 if (snmp6_alloc_dev(ndev) < 0) {
369 ADBG((KERN_WARNING
370 "%s(): cannot allocate memory for statistics; dev=%s.\n",
371 __FUNCTION__, dev->name));
372 neigh_parms_release(&nd_tbl, ndev->nd_parms);
373 ndev->dead = 1;
374 in6_dev_finish_destroy(ndev);
375 return NULL;
376 }
1da177e4 377
322f74a4
IO		 378 if (snmp6_register_dev(ndev) < 0) {
379 ADBG((KERN_WARNING
380 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
381 __FUNCTION__, dev->name));
382 neigh_parms_release(&nd_tbl, ndev->nd_parms);
383 ndev->dead = 1;
384 in6_dev_finish_destroy(ndev);
385 return NULL;
386 }
387
388 /* One reference from device. We must do this before
389 * we invoke __ipv6_regen_rndid().
390 */
391 in6_dev_hold(ndev);
1da177e4
LT		 392
393#ifdef CONFIG_IPV6_PRIVACY
322f74a4
IO		 394 init_timer(&ndev->regen_timer);
395 ndev->regen_timer.function = ipv6_regen_rndid;
396 ndev->regen_timer.data = (unsigned long) ndev;
397 if ((dev->flags&IFF_LOOPBACK) ||
398 dev->type == ARPHRD_TUNNEL ||
399 dev->type == ARPHRD_NONE ||
400 dev->type == ARPHRD_SIT) {
401 printk(KERN_INFO
402 "%s: Disabled Privacy Extensions\n",
403 dev->name);
404 ndev->cnf.use_tempaddr = -1;
405 } else {
406 in6_dev_hold(ndev);
407 ipv6_regen_rndid((unsigned long) ndev);
408 }
1da177e4
LT		 409#endif
410
322f74a4
IO		 411 if (netif_carrier_ok(dev))
412 ndev->if_flags |= IF_READY;
3c21edbd 413
8814c4b5
YH		 414 /* protected by rtnl_lock */
415 rcu_assign_pointer(dev->ip6_ptr, ndev);
1da177e4 416
322f74a4
IO		 417 ipv6_mc_init_dev(ndev);
418 ndev->tstamp = jiffies;
1da177e4 419#ifdef CONFIG_SYSCTL
322f74a4
IO		 420 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
421 NET_IPV6_NEIGH, "ipv6",
422 &ndisc_ifinfo_sysctl_change,
423 NULL);
424 addrconf_sysctl_register(ndev, &ndev->cnf);
1da177e4 425#endif
1da177e4
LT		 426 return ndev;
427}
428
429static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
430{
431 struct inet6_dev *idev;
432
433 ASSERT_RTNL();
434
435 if ((idev = __in6_dev_get(dev)) == NULL) {
436 if ((idev = ipv6_add_dev(dev)) == NULL)
437 return NULL;
438 }
c5e33bdd 439
1da177e4
LT		 440 if (dev->flags&IFF_UP)
441 ipv6_mc_up(idev);
442 return idev;
443}
444
445#ifdef CONFIG_SYSCTL
446static void dev_forward_change(struct inet6_dev *idev)
447{
448 struct net_device *dev;
449 struct inet6_ifaddr *ifa;
450 struct in6_addr addr;
451
452 if (!idev)
453 return;
454 dev = idev->dev;
455 if (dev && (dev->flags & IFF_MULTICAST)) {
456 ipv6_addr_all_routers(&addr);
457
458 if (idev->cnf.forwarding)
459 ipv6_dev_mc_inc(dev, &addr);
460 else
461 ipv6_dev_mc_dec(dev, &addr);
462 }
463 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
464 if (idev->cnf.forwarding)
465 addrconf_join_anycast(ifa);
466 else
467 addrconf_leave_anycast(ifa);
468 }
469}
470
471
472static void addrconf_forward_change(void)
473{
474 struct net_device *dev;
475 struct inet6_dev *idev;
476
477 read_lock(&dev_base_lock);
478 for (dev=dev_base; dev; dev=dev->next) {
8814c4b5 479 rcu_read_lock();
1da177e4
LT		 480 idev = __in6_dev_get(dev);
481 if (idev) {
482 int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
483 idev->cnf.forwarding = ipv6_devconf.forwarding;
484 if (changed)
485 dev_forward_change(idev);
486 }
8814c4b5 487 rcu_read_unlock();
1da177e4
LT		 488 }
489 read_unlock(&dev_base_lock);
490}
491#endif
492
493/* Nobody refers to this ifaddr, destroy it */
494
495void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
496{
497 BUG_TRAP(ifp->if_next==NULL);
498 BUG_TRAP(ifp->lst_next==NULL);
499#ifdef NET_REFCNT_DEBUG
500 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
501#endif
502
503 in6_dev_put(ifp->idev);
504
505 if (del_timer(&ifp->timer))
506 printk("Timer is still running, when freeing ifa=%p\n", ifp);
507
508 if (!ifp->dead) {
509 printk("Freeing alive inet6 address %p\n", ifp);
510 return;
511 }
512 dst_release(&ifp->rt->u.dst);
513
514 kfree(ifp);
515}
516
e55ffac6
BH		 517static void
518ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
519{
520 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 521 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 522
523 /*
524 * Each device address list is sorted in order of scope -
525 * global before linklocal.
526 */
527 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
528 ifap = &ifa->if_next) {
8a6ce0c0 529 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 530 break;
531 }
532
533 ifp->if_next = *ifap;
534 *ifap = ifp;
535}
536
1da177e4
LT		 537/* On success it returns ifp with increased reference count */
538
539static struct inet6_ifaddr *
540ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 541 int scope, u32 flags)
1da177e4
LT		 542{
543 struct inet6_ifaddr *ifa = NULL;
544 struct rt6_info *rt;
545 int hash;
546 int err = 0;
547
8814c4b5 548 rcu_read_lock_bh();
1da177e4
LT		 549 if (idev->dead) {
550 err = -ENODEV; /*XXX*/
551 goto out2;
552 }
553
554 write_lock(&addrconf_hash_lock);
555
556 /* Ignore adding duplicate addresses on an interface */
557 if (ipv6_chk_same_addr(addr, idev->dev)) {
558 ADBG(("ipv6_add_addr: already assigned\n"));
559 err = -EEXIST;
560 goto out;
561 }
562
322f74a4 563 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 564
565 if (ifa == NULL) {
566 ADBG(("ipv6_add_addr: malloc failed\n"));
567 err = -ENOBUFS;
568 goto out;
569 }
570
571 rt = addrconf_dst_alloc(idev, addr, 0);
572 if (IS_ERR(rt)) {
573 err = PTR_ERR(rt);
574 goto out;
575 }
576
1da177e4
LT		 577 ipv6_addr_copy(&ifa->addr, addr);
578
579 spin_lock_init(&ifa->lock);
580 init_timer(&ifa->timer);
581 ifa->timer.data = (unsigned long) ifa;
582 ifa->scope = scope;
583 ifa->prefix_len = pfxlen;
584 ifa->flags = flags | IFA_F_TENTATIVE;
585 ifa->cstamp = ifa->tstamp = jiffies;
586
57f5f544
KF		 587 ifa->rt = rt;
588
1da177e4
LT		 589 ifa->idev = idev;
590 in6_dev_hold(idev);
591 /* For caller */
592 in6_ifa_hold(ifa);
593
594 /* Add to big hash table */
595 hash = ipv6_addr_hash(addr);
596
597 ifa->lst_next = inet6_addr_lst[hash];
598 inet6_addr_lst[hash] = ifa;
599 in6_ifa_hold(ifa);
600 write_unlock(&addrconf_hash_lock);
601
602 write_lock(&idev->lock);
603 /* Add to inet6_dev unicast addr list. */
e55ffac6 604 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 605
606#ifdef CONFIG_IPV6_PRIVACY
607 if (ifa->flags&IFA_F_TEMPORARY) {
608 ifa->tmp_next = idev->tempaddr_list;
609 idev->tempaddr_list = ifa;
610 in6_ifa_hold(ifa);
611 }
612#endif
613
1da177e4
LT		 614 in6_ifa_hold(ifa);
615 write_unlock(&idev->lock);
616out2:
8814c4b5 617 rcu_read_unlock_bh();
1da177e4 618
fd92833a 619 if (likely(err == 0))
e041c683 620 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 621 else {
622 kfree(ifa);
623 ifa = ERR_PTR(err);
624 }
625
626 return ifa;
627out:
628 write_unlock(&addrconf_hash_lock);
629 goto out2;
630}
631
632/* This function wants to get referenced ifp and releases it before return */
633
634static void ipv6_del_addr(struct inet6_ifaddr *ifp)
635{
636 struct inet6_ifaddr *ifa, **ifap;
637 struct inet6_dev *idev = ifp->idev;
638 int hash;
639 int deleted = 0, onlink = 0;
640 unsigned long expires = jiffies;
641
642 hash = ipv6_addr_hash(&ifp->addr);
643
644 ifp->dead = 1;
645
646 write_lock_bh(&addrconf_hash_lock);
647 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
648 ifap = &ifa->lst_next) {
649 if (ifa == ifp) {
650 *ifap = ifa->lst_next;
651 __in6_ifa_put(ifp);
652 ifa->lst_next = NULL;
653 break;
654 }
655 }
656 write_unlock_bh(&addrconf_hash_lock);
657
658 write_lock_bh(&idev->lock);
659#ifdef CONFIG_IPV6_PRIVACY
660 if (ifp->flags&IFA_F_TEMPORARY) {
661 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
662 ifap = &ifa->tmp_next) {
663 if (ifa == ifp) {
664 *ifap = ifa->tmp_next;
665 if (ifp->ifpub) {
666 in6_ifa_put(ifp->ifpub);
667 ifp->ifpub = NULL;
668 }
669 __in6_ifa_put(ifp);
670 ifa->tmp_next = NULL;
671 break;
672 }
673 }
674 }
675#endif
676
1d142804 677 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 678 if (ifa == ifp) {
679 *ifap = ifa->if_next;
680 __in6_ifa_put(ifp);
681 ifa->if_next = NULL;
682 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
683 break;
684 deleted = 1;
1d142804 685 continue;
1da177e4
LT		 686 } else if (ifp->flags & IFA_F_PERMANENT) {
687 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
688 ifp->prefix_len)) {
689 if (ifa->flags & IFA_F_PERMANENT) {
690 onlink = 1;
691 if (deleted)
692 break;
693 } else {
694 unsigned long lifetime;
695
696 if (!onlink)
697 onlink = -1;
698
699 spin_lock(&ifa->lock);
700 lifetime = min_t(unsigned long,
701 ifa->valid_lft, 0x7fffffffUL/HZ);
702 if (time_before(expires,
703 ifa->tstamp + lifetime * HZ))
704 expires = ifa->tstamp + lifetime * HZ;
705 spin_unlock(&ifa->lock);
706 }
707 }
708 }
1d142804 709 ifap = &ifa->if_next;
1da177e4
LT		 710 }
711 write_unlock_bh(&idev->lock);
712
713 ipv6_ifa_notify(RTM_DELADDR, ifp);
714
e041c683 715 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 716
717 addrconf_del_timer(ifp);
718
719 /*
720 * Purge or update corresponding prefix
721 *
722 * 1) we don't purge prefix here if address was not permanent.
723 * prefix is managed by its own lifetime.
724 * 2) if there're no addresses, delete prefix.
725 * 3) if there're still other permanent address(es),
726 * corresponding prefix is still permanent.
727 * 4) otherwise, update prefix lifetime to the
728 * longest valid lifetime among the corresponding
729 * addresses on the device.
730 * Note: subsequent RA will update lifetime.
731 *
732 * --yoshfuji
733 */
734 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
735 struct in6_addr prefix;
736 struct rt6_info *rt;
737
738 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
739 rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
740
741 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
742 if (onlink == 0) {
e0a1ad73 743 ip6_del_rt(rt);
1da177e4
LT		 744 rt = NULL;
745 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
746 rt->rt6i_expires = expires;
747 rt->rt6i_flags |= RTF_EXPIRES;
748 }
749 }
750 dst_release(&rt->u.dst);
751 }
752
753 in6_ifa_put(ifp);
754}
755
756#ifdef CONFIG_IPV6_PRIVACY
757static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
758{
759 struct inet6_dev *idev = ifp->idev;
760 struct in6_addr addr, *tmpaddr;
761 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
762 int tmp_plen;
763 int ret = 0;
764 int max_addresses;
765
766 write_lock(&idev->lock);
767 if (ift) {
768 spin_lock_bh(&ift->lock);
769 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
770 spin_unlock_bh(&ift->lock);
771 tmpaddr = &addr;
772 } else {
773 tmpaddr = NULL;
774 }
775retry:
776 in6_dev_hold(idev);
777 if (idev->cnf.use_tempaddr <= 0) {
778 write_unlock(&idev->lock);
779 printk(KERN_INFO
780 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
781 in6_dev_put(idev);
782 ret = -1;
783 goto out;
784 }
785 spin_lock_bh(&ifp->lock);
786 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
787 idev->cnf.use_tempaddr = -1; /*XXX*/
788 spin_unlock_bh(&ifp->lock);
789 write_unlock(&idev->lock);
790 printk(KERN_WARNING
791 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
792 in6_dev_put(idev);
793 ret = -1;
794 goto out;
795 }
796 in6_ifa_hold(ifp);
797 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
798 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
799 spin_unlock_bh(&ifp->lock);
800 write_unlock(&idev->lock);
801 printk(KERN_WARNING
802 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
803 in6_ifa_put(ifp);
804 in6_dev_put(idev);
805 ret = -1;
806 goto out;
807 }
808 memcpy(&addr.s6_addr[8], idev->rndid, 8);
809 tmp_valid_lft = min_t(__u32,
810 ifp->valid_lft,
811 idev->cnf.temp_valid_lft);
812 tmp_prefered_lft = min_t(__u32,
813 ifp->prefered_lft,
814 idev->cnf.temp_prefered_lft - desync_factor / HZ);
815 tmp_plen = ifp->prefix_len;
816 max_addresses = idev->cnf.max_addresses;
817 tmp_cstamp = ifp->cstamp;
818 tmp_tstamp = ifp->tstamp;
819 spin_unlock_bh(&ifp->lock);
820
821 write_unlock(&idev->lock);
822 ift = !max_addresses ||
823 ipv6_count_addresses(idev) < max_addresses ?
824 ipv6_add_addr(idev, &addr, tmp_plen,
825 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
826 if (!ift || IS_ERR(ift)) {
827 in6_ifa_put(ifp);
828 in6_dev_put(idev);
829 printk(KERN_INFO
830 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
831 tmpaddr = &addr;
832 write_lock(&idev->lock);
833 goto retry;
834 }
835
836 spin_lock_bh(&ift->lock);
837 ift->ifpub = ifp;
838 ift->valid_lft = tmp_valid_lft;
839 ift->prefered_lft = tmp_prefered_lft;
840 ift->cstamp = tmp_cstamp;
841 ift->tstamp = tmp_tstamp;
842 spin_unlock_bh(&ift->lock);
843
844 addrconf_dad_start(ift, 0);
845 in6_ifa_put(ift);
846 in6_dev_put(idev);
847out:
848 return ret;
849}
850#endif
851
852/*
072047e4 853 * Choose an appropriate source address (RFC3484)
1da177e4 854 */
072047e4
YH		 855struct ipv6_saddr_score {
856 int addr_type;
857 unsigned int attrs;
858 int matchlen;
0d27b427 859 int scope;
072047e4
YH		 860 unsigned int rule;
861};
862
863#define IPV6_SADDR_SCORE_LOCAL 0x0001
864#define IPV6_SADDR_SCORE_PREFERRED 0x0004
865#define IPV6_SADDR_SCORE_HOA 0x0008
866#define IPV6_SADDR_SCORE_OIF 0x0010
867#define IPV6_SADDR_SCORE_LABEL 0x0020
868#define IPV6_SADDR_SCORE_PRIVACY 0x0040
869
870static int inline ipv6_saddr_preferred(int type)
1da177e4 871{
072047e4
YH		 872 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
873 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
874 return 1;
875 return 0;
1da177e4
LT		 876}
877
072047e4
YH		 878/* static matching label */
879static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
880{
881 /*
882 * prefix (longest match) label
883 * -----------------------------
884 * ::1/128 0
885 * ::/0 1
886 * 2002::/16 2
887 * ::/96 3
888 * ::ffff:0:0/96 4
102128e3
ŁS		 889 * fc00::/7 5
890 * 2001::/32 6
072047e4
YH		 891 */
892 if (type & IPV6_ADDR_LOOPBACK)
893 return 0;
894 else if (type & IPV6_ADDR_COMPATv4)
895 return 3;
896 else if (type & IPV6_ADDR_MAPPED)
897 return 4;
102128e3
ŁS		 898 else if (addr->s6_addr32[0] == htonl(0x20010000))
899 return 6;
072047e4
YH		 900 else if (addr->s6_addr16[0] == htons(0x2002))
901 return 2;
102128e3
ŁS		 902 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
903 return 5;
072047e4
YH		 904 return 1;
905}
1da177e4 906
072047e4 907int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 908 struct in6_addr *daddr, struct in6_addr *saddr)
909{
072047e4
YH		 910 struct ipv6_saddr_score hiscore;
911 struct inet6_ifaddr *ifa_result = NULL;
912 int daddr_type = __ipv6_addr_type(daddr);
913 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
914 u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
915 struct net_device *dev;
1da177e4 916
072047e4 917 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 918
072047e4 919 read_lock(&dev_base_lock);
8814c4b5 920 rcu_read_lock();
1da177e4 921
072047e4
YH		 922 for (dev = dev_base; dev; dev=dev->next) {
923 struct inet6_dev *idev;
924 struct inet6_ifaddr *ifa;
925
926 /* Rule 0: Candidate Source Address (section 4)
927 * - multicast and link-local destination address,
928 * the set of candidate source address MUST only
929 * include addresses assigned to interfaces
930 * belonging to the same link as the outgoing
931 * interface.
932 * (- For site-local destination addresses, the
933 * set of candidate source addresses MUST only
934 * include addresses assigned to interfaces
935 * belonging to the same site as the outgoing
936 * interface.)
937 */
938 if ((daddr_type & IPV6_ADDR_MULTICAST ||
939 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
940 daddr_dev && dev != daddr_dev)
941 continue;
1da177e4 942
1da177e4 943 idev = __in6_dev_get(dev);
072047e4
YH		 944 if (!idev)
945 continue;
946
947 read_lock_bh(&idev->lock);
948 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
949 struct ipv6_saddr_score score;
950
951 score.addr_type = __ipv6_addr_type(&ifa->addr);
952
6b3ae80a
YH		 953 /* Rule 0:
954 * - Tentative Address (RFC2462 section 5.4)
955 * - A tentative address is not considered
956 * "assigned to an interface" in the traditional
957 * sense.
958 * - Candidate Source Address (section 4)
072047e4
YH		 959 * - In any case, anycast addresses, multicast
960 * addresses, and the unspecified address MUST
961 * NOT be included in a candidate set.
962 */
6b3ae80a
YH		 963 if (ifa->flags & IFA_F_TENTATIVE)
964 continue;
072047e4
YH		 965 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
966 score.addr_type & IPV6_ADDR_MULTICAST)) {
967 LIMIT_NETDEBUG(KERN_DEBUG
968 "ADDRCONF: unspecified / multicast address"
969 "assigned as unicast address on %s",
970 dev->name);
971 continue;
972 }
973
974 score.attrs = 0;
975 score.matchlen = 0;
976 score.scope = 0;
977 score.rule = 0;
978
979 if (ifa_result == NULL) {
980 /* record it if the first available entry */
981 goto record_it;
982 }
983
984 /* Rule 1: Prefer same address */
985 if (hiscore.rule < 1) {
986 if (ipv6_addr_equal(&ifa_result->addr, daddr))
987 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
988 hiscore.rule++;
989 }
990 if (ipv6_addr_equal(&ifa->addr, daddr)) {
991 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
992 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
993 score.rule = 1;
994 goto record_it;
1da177e4 995 }
072047e4
YH		 996 } else {
997 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
998 continue;
1da177e4 999 }
1da177e4 1000
072047e4
YH		 1001 /* Rule 2: Prefer appropriate scope */
1002 if (hiscore.rule < 2) {
1003 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1004 hiscore.rule++;
1005 }
1006 score.scope = __ipv6_addr_src_scope(score.addr_type);
1007 if (hiscore.scope < score.scope) {
1008 if (hiscore.scope < daddr_scope) {
1009 score.rule = 2;
1010 goto record_it;
1011 } else
1012 continue;
1013 } else if (score.scope < hiscore.scope) {
1014 if (score.scope < daddr_scope)
e55ffac6 1015 break; /* addresses sorted by scope */
072047e4
YH		 1016 else {
1017 score.rule = 2;
1018 goto record_it;
1019 }
1020 }
1da177e4 1021
072047e4
YH		 1022 /* Rule 3: Avoid deprecated address */
1023 if (hiscore.rule < 3) {
1024 if (ipv6_saddr_preferred(hiscore.addr_type) ||
1025 !(ifa_result->flags & IFA_F_DEPRECATED))
1026 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1027 hiscore.rule++;
1028 }
1029 if (ipv6_saddr_preferred(score.addr_type) ||
1030 !(ifa->flags & IFA_F_DEPRECATED)) {
1031 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1032 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1033 score.rule = 3;
1034 goto record_it;
1035 }
1036 } else {
1037 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1038 continue;
1039 }
1da177e4 1040
072047e4 1041 /* Rule 4: Prefer home address -- not implemented yet */
220bbd74
YH		 1042 if (hiscore.rule < 4)
1043 hiscore.rule++;
072047e4
YH		 1044
1045 /* Rule 5: Prefer outgoing interface */
1046 if (hiscore.rule < 5) {
1047 if (daddr_dev == NULL ||
1048 daddr_dev == ifa_result->idev->dev)
1049 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1050 hiscore.rule++;
1051 }
1052 if (daddr_dev == NULL ||
1053 daddr_dev == ifa->idev->dev) {
1054 score.attrs |= IPV6_SADDR_SCORE_OIF;
1055 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1056 score.rule = 5;
1057 goto record_it;
1058 }
1059 } else {
1060 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1061 continue;
1062 }
1063
1064 /* Rule 6: Prefer matching label */
1065 if (hiscore.rule < 6) {
1066 if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
1067 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1068 hiscore.rule++;
1069 }
1070 if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
1071 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1072 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1073 score.rule = 6;
1074 goto record_it;
1da177e4 1075 }
072047e4
YH		 1076 } else {
1077 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1078 continue;
1079 }
1080
44fd0261 1081#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1082 /* Rule 7: Prefer public address
1083 * Note: prefer temprary address if use_tempaddr >= 2
1084 */
1085 if (hiscore.rule < 7) {
1086 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1087 (ifa_result->idev->cnf.use_tempaddr >= 2))
1088 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1089 hiscore.rule++;
1090 }
1091 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1092 (ifa->idev->cnf.use_tempaddr >= 2)) {
1093 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1094 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1095 score.rule = 7;
1096 goto record_it;
1097 }
1098 } else {
1099 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1100 continue;
1101 }
5e2707fa
YH		 1102#else
1103 if (hiscore.rule < 7)
1104 hiscore.rule++;
44fd0261 1105#endif
072047e4 1106 /* Rule 8: Use longest matching prefix */
12da2a43 1107 if (hiscore.rule < 8) {
072047e4 1108 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1109 hiscore.rule++;
1110 }
072047e4
YH		 1111 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1112 if (score.matchlen > hiscore.matchlen) {
1113 score.rule = 8;
1114 goto record_it;
1da177e4 1115 }
072047e4
YH		 1116#if 0
1117 else if (score.matchlen < hiscore.matchlen)
1118 continue;
1119#endif
1120
1121 /* Final Rule: choose first available one */
1122 continue;
1123record_it:
1124 if (ifa_result)
1125 in6_ifa_put(ifa_result);
1126 in6_ifa_hold(ifa);
1127 ifa_result = ifa;
1128 hiscore = score;
1da177e4 1129 }
072047e4 1130 read_unlock_bh(&idev->lock);
1da177e4 1131 }
8814c4b5 1132 rcu_read_unlock();
1da177e4
LT		 1133 read_unlock(&dev_base_lock);
1134
072047e4
YH		 1135 if (!ifa_result)
1136 return -EADDRNOTAVAIL;
1137
1138 ipv6_addr_copy(saddr, &ifa_result->addr);
1139 in6_ifa_put(ifa_result);
1140 return 0;
1da177e4
LT		 1141}
1142
1143
1144int ipv6_get_saddr(struct dst_entry *dst,
1145 struct in6_addr *daddr, struct in6_addr *saddr)
1146{
1147 return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
1148}
1149
1150
1151int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
1152{
1153 struct inet6_dev *idev;
1154 int err = -EADDRNOTAVAIL;
1155
8814c4b5 1156 rcu_read_lock();
1da177e4
LT		 1157 if ((idev = __in6_dev_get(dev)) != NULL) {
1158 struct inet6_ifaddr *ifp;
1159
1160 read_lock_bh(&idev->lock);
1161 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1162 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1163 ipv6_addr_copy(addr, &ifp->addr);
1164 err = 0;
1165 break;
1166 }
1167 }
1168 read_unlock_bh(&idev->lock);
1169 }
8814c4b5 1170 rcu_read_unlock();
1da177e4
LT		 1171 return err;
1172}
1173
1174static int ipv6_count_addresses(struct inet6_dev *idev)
1175{
1176 int cnt = 0;
1177 struct inet6_ifaddr *ifp;
1178
1179 read_lock_bh(&idev->lock);
1180 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1181 cnt++;
1182 read_unlock_bh(&idev->lock);
1183 return cnt;
1184}
1185
1186int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
1187{
1188 struct inet6_ifaddr * ifp;
1189 u8 hash = ipv6_addr_hash(addr);
1190
1191 read_lock_bh(&addrconf_hash_lock);
1192 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1193 if (ipv6_addr_equal(&ifp->addr, addr) &&
1194 !(ifp->flags&IFA_F_TENTATIVE)) {
1195 if (dev == NULL || ifp->idev->dev == dev ||
1196 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1197 break;
1198 }
1199 }
1200 read_unlock_bh(&addrconf_hash_lock);
1201 return ifp != NULL;
1202}
1203
1204static
1205int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
1206{
1207 struct inet6_ifaddr * ifp;
1208 u8 hash = ipv6_addr_hash(addr);
1209
1210 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1211 if (ipv6_addr_equal(&ifp->addr, addr)) {
1212 if (dev == NULL || ifp->idev->dev == dev)
1213 break;
1214 }
1215 }
1216 return ifp != NULL;
1217}
1218
1219struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
1220{
1221 struct inet6_ifaddr * ifp;
1222 u8 hash = ipv6_addr_hash(addr);
1223
1224 read_lock_bh(&addrconf_hash_lock);
1225 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1226 if (ipv6_addr_equal(&ifp->addr, addr)) {
1227 if (dev == NULL || ifp->idev->dev == dev ||
1228 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1229 in6_ifa_hold(ifp);
1230 break;
1231 }
1232 }
1233 }
1234 read_unlock_bh(&addrconf_hash_lock);
1235
1236 return ifp;
1237}
1238
1239int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1240{
1241 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1242 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
1da177e4 1243 u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
8feaf0c0 1244 u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1245 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1246 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1247 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1248 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1249
1250 if (!sk2_rcv_saddr && !sk_ipv6only)
1251 return 1;
1252
1253 if (addr_type2 == IPV6_ADDR_ANY &&
1254 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1255 return 1;
1256
1257 if (addr_type == IPV6_ADDR_ANY &&
1258 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1259 return 1;
1260
1261 if (sk2_rcv_saddr6 &&
1262 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1263 return 1;
1264
1265 if (addr_type == IPV6_ADDR_MAPPED &&
1266 !sk2_ipv6only &&
1267 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1268 return 1;
1269
1270 return 0;
1271}
1272
1273/* Gets referenced address, destroys ifaddr */
1274
9f5336e2 1275static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1276{
1da177e4
LT		 1277 if (ifp->flags&IFA_F_PERMANENT) {
1278 spin_lock_bh(&ifp->lock);
1279 addrconf_del_timer(ifp);
1280 ifp->flags |= IFA_F_TENTATIVE;
1281 spin_unlock_bh(&ifp->lock);
1282 in6_ifa_put(ifp);
1283#ifdef CONFIG_IPV6_PRIVACY
1284 } else if (ifp->flags&IFA_F_TEMPORARY) {
1285 struct inet6_ifaddr *ifpub;
1286 spin_lock_bh(&ifp->lock);
1287 ifpub = ifp->ifpub;
1288 if (ifpub) {
1289 in6_ifa_hold(ifpub);
1290 spin_unlock_bh(&ifp->lock);
1291 ipv6_create_tempaddr(ifpub, ifp);
1292 in6_ifa_put(ifpub);
1293 } else {
1294 spin_unlock_bh(&ifp->lock);
1295 }
1296 ipv6_del_addr(ifp);
1297#endif
1298 } else
1299 ipv6_del_addr(ifp);
1300}
1301
3c21edbd
YH		 1302void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1303{
1304 if (net_ratelimit())
1305 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1306 addrconf_dad_stop(ifp);
1307}
1da177e4
LT		 1308
1309/* Join to solicited addr multicast group. */
1310
1311void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1312{
1313 struct in6_addr maddr;
1314
1315 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1316 return;
1317
1318 addrconf_addr_solict_mult(addr, &maddr);
1319 ipv6_dev_mc_inc(dev, &maddr);
1320}
1321
1322void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1323{
1324 struct in6_addr maddr;
1325
1326 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1327 return;
1328
1329 addrconf_addr_solict_mult(addr, &maddr);
1330 __ipv6_dev_mc_dec(idev, &maddr);
1331}
1332
20380731 1333static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1334{
1335 struct in6_addr addr;
1336 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1337 if (ipv6_addr_any(&addr))
1338 return;
1339 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1340}
1341
20380731 1342static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1343{
1344 struct in6_addr addr;
1345 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1346 if (ipv6_addr_any(&addr))
1347 return;
1348 __ipv6_dev_ac_dec(ifp->idev, &addr);
1349}
1350
073a8e0e
YH		 1351static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1352{
1353 if (dev->addr_len != ETH_ALEN)
1354 return -1;
1355 memcpy(eui, dev->dev_addr, 3);
1356 memcpy(eui + 5, dev->dev_addr + 3, 3);
1357
1358 /*
1359 * The zSeries OSA network cards can be shared among various
1360 * OS instances, but the OSA cards have only one MAC address.
1361 * This leads to duplicate address conflicts in conjunction
1362 * with IPv6 if more than one instance uses the same card.
1363 *
1364 * The driver for these cards can deliver a unique 16-bit
1365 * identifier for each instance sharing the same card. It is
1366 * placed instead of 0xFFFE in the interface identifier. The
1367 * "u" bit of the interface identifier is not inverted in this
1368 * case. Hence the resulting interface identifier has local
1369 * scope according to RFC2373.
1370 */
1371 if (dev->dev_id) {
1372 eui[3] = (dev->dev_id >> 8) & 0xFF;
1373 eui[4] = dev->dev_id & 0xFF;
1374 } else {
1375 eui[3] = 0xFF;
1376 eui[4] = 0xFE;
1377 eui[0] ^= 2;
1378 }
1379 return 0;
1380}
1381
1382static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1383{
1384 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1385 if (dev->addr_len != ARCNET_ALEN)
1386 return -1;
1387 memset(eui, 0, 7);
1388 eui[7] = *(u8*)dev->dev_addr;
1389 return 0;
1390}
1391
1392static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1393{
1394 if (dev->addr_len != INFINIBAND_ALEN)
1395 return -1;
1396 memcpy(eui, dev->dev_addr + 12, 8);
1397 eui[0] |= 2;
1398 return 0;
1399}
1400
1da177e4
LT		 1401static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1402{
1403 switch (dev->type) {
1404 case ARPHRD_ETHER:
1405 case ARPHRD_FDDI:
1406 case ARPHRD_IEEE802_TR:
073a8e0e 1407 return addrconf_ifid_eui48(eui, dev);
1da177e4 1408 case ARPHRD_ARCNET:
073a8e0e 1409 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1410 case ARPHRD_INFINIBAND:
073a8e0e 1411 return addrconf_ifid_infiniband(eui, dev);
1da177e4
LT		 1412 }
1413 return -1;
1414}
1415
1416static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1417{
1418 int err = -1;
1419 struct inet6_ifaddr *ifp;
1420
1421 read_lock_bh(&idev->lock);
1422 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1423 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1424 memcpy(eui, ifp->addr.s6_addr+8, 8);
1425 err = 0;
1426 break;
1427 }
1428 }
1429 read_unlock_bh(&idev->lock);
1430 return err;
1431}
1432
1433#ifdef CONFIG_IPV6_PRIVACY
1434/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1435static int __ipv6_regen_rndid(struct inet6_dev *idev)
1436{
1da177e4 1437regen:
955189ef 1438 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1439 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1440
1441 /*
1442 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1443 * check if generated address is not inappropriate
1444 *
1445 * - Reserved subnet anycast (RFC 2526)
1446 * 11111101 11....11 1xxxxxxx
1447 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1448 * 00-00-5E-FE-xx-xx-xx-xx
1449 * - value 0
1450 * - XXX: already assigned to an address on the device
1451 */
1452 if (idev->rndid[0] == 0xfd &&
1453 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1454 (idev->rndid[7]&0x80))
1455 goto regen;
1456 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1457 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1458 goto regen;
1459 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1460 goto regen;
1461 }
1462
1463 return 0;
1464}
1465
1466static void ipv6_regen_rndid(unsigned long data)
1467{
1468 struct inet6_dev *idev = (struct inet6_dev *) data;
1469 unsigned long expires;
1470
8814c4b5 1471 rcu_read_lock_bh();
1da177e4
LT		 1472 write_lock_bh(&idev->lock);
1473
1474 if (idev->dead)
1475 goto out;
1476
1477 if (__ipv6_regen_rndid(idev) < 0)
1478 goto out;
1479
1480 expires = jiffies +
1481 idev->cnf.temp_prefered_lft * HZ -
1482 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1483 if (time_before(expires, jiffies)) {
1484 printk(KERN_WARNING
1485 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1486 idev->dev->name);
1487 goto out;
1488 }
1489
1490 if (!mod_timer(&idev->regen_timer, expires))
1491 in6_dev_hold(idev);
1492
1493out:
1494 write_unlock_bh(&idev->lock);
8814c4b5 1495 rcu_read_unlock_bh();
1da177e4
LT		 1496 in6_dev_put(idev);
1497}
1498
1499static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1500 int ret = 0;
1501
1502 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1503 ret = __ipv6_regen_rndid(idev);
1504 return ret;
1505}
1506#endif
1507
1508/*
1509 * Add prefix route.
1510 */
1511
1512static void
1513addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1514 unsigned long expires, u32 flags)
1da177e4 1515{
86872cb5
TG		 1516 struct fib6_config cfg = {
1517 .fc_table = RT6_TABLE_PREFIX,
1518 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1519 .fc_ifindex = dev->ifindex,
1520 .fc_expires = expires,
1521 .fc_dst_len = plen,
1522 .fc_flags = RTF_UP | flags,
1523 };
1da177e4 1524
86872cb5 1525 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1526
1527 /* Prevent useless cloning on PtP SIT.
1528 This thing is done here expecting that the whole
1529 class of non-broadcast devices need not cloning.
1530 */
86872cb5
TG		 1531 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1532 cfg.fc_flags |= RTF_NONEXTHOP;
1da177e4 1533
86872cb5 1534 ip6_route_add(&cfg);
1da177e4
LT		 1535}
1536
1537/* Create "default" multicast route to the interface */
1538
1539static void addrconf_add_mroute(struct net_device *dev)
1540{
86872cb5
TG		 1541 struct fib6_config cfg = {
1542 .fc_table = RT6_TABLE_LOCAL,
1543 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1544 .fc_ifindex = dev->ifindex,
1545 .fc_dst_len = 8,
1546 .fc_flags = RTF_UP,
1547 };
1548
1549 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1550
1551 ip6_route_add(&cfg);
1da177e4
LT		 1552}
1553
1554static void sit_route_add(struct net_device *dev)
1555{
86872cb5
TG		 1556 struct fib6_config cfg = {
1557 .fc_table = RT6_TABLE_MAIN,
1558 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1559 .fc_ifindex = dev->ifindex,
1560 .fc_dst_len = 96,
1561 .fc_flags = RTF_UP | RTF_NONEXTHOP,
1562 };
1da177e4
LT		 1563
1564 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1565 ip6_route_add(&cfg);
1da177e4
LT		 1566}
1567
1568static void addrconf_add_lroute(struct net_device *dev)
1569{
1570 struct in6_addr addr;
1571
1572 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1573 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1574}
1575
1576static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1577{
1578 struct inet6_dev *idev;
1579
1580 ASSERT_RTNL();
1581
1582 if ((idev = ipv6_find_idev(dev)) == NULL)
1583 return NULL;
1584
1585 /* Add default multicast route */
1586 addrconf_add_mroute(dev);
1587
1588 /* Add link local route */
1589 addrconf_add_lroute(dev);
1590 return idev;
1591}
1592
1593void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1594{
1595 struct prefix_info *pinfo;
1596 __u32 valid_lft;
1597 __u32 prefered_lft;
1598 int addr_type;
1599 unsigned long rt_expires;
1600 struct inet6_dev *in6_dev;
1601
1602 pinfo = (struct prefix_info *) opt;
1603
1604 if (len < sizeof(struct prefix_info)) {
1605 ADBG(("addrconf: prefix option too short\n"));
1606 return;
1607 }
1608
1609 /*
1610 * Validation checks ([ADDRCONF], page 19)
1611 */
1612
1613 addr_type = ipv6_addr_type(&pinfo->prefix);
1614
1615 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1616 return;
1617
1618 valid_lft = ntohl(pinfo->valid);
1619 prefered_lft = ntohl(pinfo->prefered);
1620
1621 if (prefered_lft > valid_lft) {
1622 if (net_ratelimit())
1623 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1624 return;
1625 }
1626
1627 in6_dev = in6_dev_get(dev);
1628
1629 if (in6_dev == NULL) {
1630 if (net_ratelimit())
1631 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1632 return;
1633 }
1634
1635 /*
1636 * Two things going on here:
1637 * 1) Add routes for on-link prefixes
1638 * 2) Configure prefixes with the auto flag set
1639 */
1640
1641 /* Avoid arithmetic overflow. Really, we could
1642 save rt_expires in seconds, likely valid_lft,
1643 but it would require division in fib gc, that it
1644 not good.
1645 */
1646 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1647 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1648 else
3dd4bc68
YH		 1649 rt_expires = valid_lft * HZ;
1650
1651 /*
1652 * We convert this (in jiffies) to clock_t later.
1653 * Avoid arithmetic overflow there as well.
1654 * Overflow can happen only if HZ < USER_HZ.
1655 */
1656 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1657 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1658
1659 if (pinfo->onlink) {
1660 struct rt6_info *rt;
1661 rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
1662
1663 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1664 if (rt->rt6i_flags&RTF_EXPIRES) {
1665 if (valid_lft == 0) {
e0a1ad73 1666 ip6_del_rt(rt);
1da177e4
LT		 1667 rt = NULL;
1668 } else {
3dd4bc68 1669 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1670 }
1671 }
1672 } else if (valid_lft) {
1673 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1674 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1675 }
1676 if (rt)
1677 dst_release(&rt->u.dst);
1678 }
1679
1680 /* Try to figure out our local address for this prefix */
1681
1682 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1683 struct inet6_ifaddr * ifp;
1684 struct in6_addr addr;
1685 int create = 0, update_lft = 0;
1686
1687 if (pinfo->prefix_len == 64) {
1688 memcpy(&addr, &pinfo->prefix, 8);
1689 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1690 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1691 in6_dev_put(in6_dev);
1692 return;
1693 }
1694 goto ok;
1695 }
1696 if (net_ratelimit())
1697 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1698 pinfo->prefix_len);
1699 in6_dev_put(in6_dev);
1700 return;
1701
1702ok:
1703
1704 ifp = ipv6_get_ifaddr(&addr, dev, 1);
1705
1706 if (ifp == NULL && valid_lft) {
1707 int max_addresses = in6_dev->cnf.max_addresses;
1708
1709 /* Do not allow to create too much of autoconfigured
1710 * addresses; this would be too easy way to crash kernel.
1711 */
1712 if (!max_addresses ||
1713 ipv6_count_addresses(in6_dev) < max_addresses)
1714 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
1715 addr_type&IPV6_ADDR_SCOPE_MASK, 0);
1716
1717 if (!ifp || IS_ERR(ifp)) {
1718 in6_dev_put(in6_dev);
1719 return;
1720 }
1721
1722 update_lft = create = 1;
1723 ifp->cstamp = jiffies;
1724 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1725 }
1726
1727 if (ifp) {
1728 int flags;
1729 unsigned long now;
1730#ifdef CONFIG_IPV6_PRIVACY
1731 struct inet6_ifaddr *ift;
1732#endif
1733 u32 stored_lft;
1734
1735 /* update lifetime (RFC2462 5.5.3 e) */
1736 spin_lock(&ifp->lock);
1737 now = jiffies;
1738 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1739 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1740 else
1741 stored_lft = 0;
1742 if (!update_lft && stored_lft) {
1743 if (valid_lft > MIN_VALID_LIFETIME ||
1744 valid_lft > stored_lft)
1745 update_lft = 1;
1746 else if (stored_lft <= MIN_VALID_LIFETIME) {
1747 /* valid_lft <= stored_lft is always true */
1748 /* XXX: IPsec */
1749 update_lft = 0;
1750 } else {
1751 valid_lft = MIN_VALID_LIFETIME;
1752 if (valid_lft < prefered_lft)
1753 prefered_lft = valid_lft;
1754 update_lft = 1;
1755 }
1756 }
1757
1758 if (update_lft) {
1759 ifp->valid_lft = valid_lft;
1760 ifp->prefered_lft = prefered_lft;
1761 ifp->tstamp = now;
1762 flags = ifp->flags;
1763 ifp->flags &= ~IFA_F_DEPRECATED;
1764 spin_unlock(&ifp->lock);
1765
1766 if (!(flags&IFA_F_TENTATIVE))
1767 ipv6_ifa_notify(0, ifp);
1768 } else
1769 spin_unlock(&ifp->lock);
1770
1771#ifdef CONFIG_IPV6_PRIVACY
1772 read_lock_bh(&in6_dev->lock);
1773 /* update all temporary addresses in the list */
1774 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1775 /*
1776 * When adjusting the lifetimes of an existing
1777 * temporary address, only lower the lifetimes.
1778 * Implementations must not increase the
1779 * lifetimes of an existing temporary address
1780 * when processing a Prefix Information Option.
1781 */
1782 spin_lock(&ift->lock);
1783 flags = ift->flags;
1784 if (ift->valid_lft > valid_lft &&
1785 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1786 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1787 if (ift->prefered_lft > prefered_lft &&
1788 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1789 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1790 spin_unlock(&ift->lock);
1791 if (!(flags&IFA_F_TENTATIVE))
1792 ipv6_ifa_notify(0, ift);
1793 }
1794
1795 if (create && in6_dev->cnf.use_tempaddr > 0) {
1796 /*
1797 * When a new public address is created as described in [ADDRCONF],
1798 * also create a new temporary address.
1799 */
1800 read_unlock_bh(&in6_dev->lock);
1801 ipv6_create_tempaddr(ifp, NULL);
1802 } else {
1803 read_unlock_bh(&in6_dev->lock);
1804 }
1805#endif
1806 in6_ifa_put(ifp);
1807 addrconf_verify(0);
1808 }
1809 }
1810 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1811 in6_dev_put(in6_dev);
1812}
1813
1814/*
1815 * Set destination address.
1816 * Special case for SIT interfaces where we create a new "virtual"
1817 * device.
1818 */
1819int addrconf_set_dstaddr(void __user *arg)
1820{
1821 struct in6_ifreq ireq;
1822 struct net_device *dev;
1823 int err = -EINVAL;
1824
1825 rtnl_lock();
1826
1827 err = -EFAULT;
1828 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1829 goto err_exit;
1830
1831 dev = __dev_get_by_index(ireq.ifr6_ifindex);
1832
1833 err = -ENODEV;
1834 if (dev == NULL)
1835 goto err_exit;
1836
1837 if (dev->type == ARPHRD_SIT) {
1838 struct ifreq ifr;
1839 mm_segment_t oldfs;
1840 struct ip_tunnel_parm p;
1841
1842 err = -EADDRNOTAVAIL;
1843 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1844 goto err_exit;
1845
1846 memset(&p, 0, sizeof(p));
1847 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1848 p.iph.saddr = 0;
1849 p.iph.version = 4;
1850 p.iph.ihl = 5;
1851 p.iph.protocol = IPPROTO_IPV6;
1852 p.iph.ttl = 64;
1853 ifr.ifr_ifru.ifru_data = (void __user *)&p;
1854
1855 oldfs = get_fs(); set_fs(KERNEL_DS);
1856 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1857 set_fs(oldfs);
1858
1859 if (err == 0) {
1860 err = -ENOBUFS;
1861 if ((dev = __dev_get_by_name(p.name)) == NULL)
1862 goto err_exit;
1863 err = dev_open(dev);
1864 }
1865 }
1866
1867err_exit:
1868 rtnl_unlock();
1869 return err;
1870}
1871
1872/*
1873 * Manual configuration of address on an interface
1874 */
0778769d
NT		 1875static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
1876 __u32 prefered_lft, __u32 valid_lft)
1da177e4
LT		 1877{
1878 struct inet6_ifaddr *ifp;
1879 struct inet6_dev *idev;
1880 struct net_device *dev;
0778769d 1881 __u8 ifa_flags = 0;
1da177e4
LT		 1882 int scope;
1883
1884 ASSERT_RTNL();
1885
0778769d
NT		 1886 /* check the lifetime */
1887 if (!valid_lft || prefered_lft > valid_lft)
1888 return -EINVAL;
1889
1da177e4
LT		 1890 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1891 return -ENODEV;
1892
1da177e4
LT		 1893 if ((idev = addrconf_add_dev(dev)) == NULL)
1894 return -ENOBUFS;
1895
1896 scope = ipv6_addr_scope(pfx);
1897
0778769d
NT		 1898 if (valid_lft == INFINITY_LIFE_TIME)
1899 ifa_flags |= IFA_F_PERMANENT;
1900 else if (valid_lft >= 0x7FFFFFFF/HZ)
1901 valid_lft = 0x7FFFFFFF/HZ;
1902
1903 if (prefered_lft == 0)
1904 ifa_flags |= IFA_F_DEPRECATED;
1905 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1906 (prefered_lft != INFINITY_LIFE_TIME))
1907 prefered_lft = 0x7FFFFFFF/HZ;
1908
1909 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1910
1da177e4 1911 if (!IS_ERR(ifp)) {
06aebfb7 1912 spin_lock_bh(&ifp->lock);
0778769d
NT		 1913 ifp->valid_lft = valid_lft;
1914 ifp->prefered_lft = prefered_lft;
1915 ifp->tstamp = jiffies;
06aebfb7 1916 spin_unlock_bh(&ifp->lock);
0778769d 1917
1da177e4
LT		 1918 addrconf_dad_start(ifp, 0);
1919 in6_ifa_put(ifp);
0778769d 1920 addrconf_verify(0);
1da177e4
LT		 1921 return 0;
1922 }
1923
1924 return PTR_ERR(ifp);
1925}
1926
1927static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
1928{
1929 struct inet6_ifaddr *ifp;
1930 struct inet6_dev *idev;
1931 struct net_device *dev;
1932
1933 if ((dev = __dev_get_by_index(ifindex)) == NULL)
1934 return -ENODEV;
1935
1936 if ((idev = __in6_dev_get(dev)) == NULL)
1937 return -ENXIO;
1938
1939 read_lock_bh(&idev->lock);
1940 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
1941 if (ifp->prefix_len == plen &&
1942 ipv6_addr_equal(pfx, &ifp->addr)) {
1943 in6_ifa_hold(ifp);
1944 read_unlock_bh(&idev->lock);
1945
1946 ipv6_del_addr(ifp);
1947
1948 /* If the last address is deleted administratively,
1949 disable IPv6 on this interface.
1950 */
1951 if (idev->addr_list == NULL)
1952 addrconf_ifdown(idev->dev, 1);
1953 return 0;
1954 }
1955 }
1956 read_unlock_bh(&idev->lock);
1957 return -EADDRNOTAVAIL;
1958}
1959
1960
1961int addrconf_add_ifaddr(void __user *arg)
1962{
1963 struct in6_ifreq ireq;
1964 int err;
1965
1966 if (!capable(CAP_NET_ADMIN))
1967 return -EPERM;
1968
1969 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1970 return -EFAULT;
1971
1972 rtnl_lock();
0778769d
NT		 1973 err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
1974 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 1975 rtnl_unlock();
1976 return err;
1977}
1978
1979int addrconf_del_ifaddr(void __user *arg)
1980{
1981 struct in6_ifreq ireq;
1982 int err;
1983
1984 if (!capable(CAP_NET_ADMIN))
1985 return -EPERM;
1986
1987 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1988 return -EFAULT;
1989
1990 rtnl_lock();
1991 err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
1992 rtnl_unlock();
1993 return err;
1994}
1995
1996static void sit_add_v4_addrs(struct inet6_dev *idev)
1997{
1998 struct inet6_ifaddr * ifp;
1999 struct in6_addr addr;
2000 struct net_device *dev;
2001 int scope;
2002
2003 ASSERT_RTNL();
2004
2005 memset(&addr, 0, sizeof(struct in6_addr));
2006 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2007
2008 if (idev->dev->flags&IFF_POINTOPOINT) {
2009 addr.s6_addr32[0] = htonl(0xfe800000);
2010 scope = IFA_LINK;
2011 } else {
2012 scope = IPV6_ADDR_COMPATv4;
2013 }
2014
2015 if (addr.s6_addr32[3]) {
2016 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2017 if (!IS_ERR(ifp)) {
2018 spin_lock_bh(&ifp->lock);
2019 ifp->flags &= ~IFA_F_TENTATIVE;
2020 spin_unlock_bh(&ifp->lock);
2021 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2022 in6_ifa_put(ifp);
2023 }
2024 return;
2025 }
2026
2027 for (dev = dev_base; dev != NULL; dev = dev->next) {
e5ed6399 2028 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2029 if (in_dev && (dev->flags & IFF_UP)) {
2030 struct in_ifaddr * ifa;
2031
2032 int flag = scope;
2033
2034 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2035 int plen;
2036
2037 addr.s6_addr32[3] = ifa->ifa_local;
2038
2039 if (ifa->ifa_scope == RT_SCOPE_LINK)
2040 continue;
2041 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2042 if (idev->dev->flags&IFF_POINTOPOINT)
2043 continue;
2044 flag |= IFA_HOST;
2045 }
2046 if (idev->dev->flags&IFF_POINTOPOINT)
2047 plen = 64;
2048 else
2049 plen = 96;
2050
2051 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2052 IFA_F_PERMANENT);
2053 if (!IS_ERR(ifp)) {
2054 spin_lock_bh(&ifp->lock);
2055 ifp->flags &= ~IFA_F_TENTATIVE;
2056 spin_unlock_bh(&ifp->lock);
2057 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2058 in6_ifa_put(ifp);
2059 }
2060 }
2061 }
2062 }
2063}
2064
2065static void init_loopback(struct net_device *dev)
2066{
2067 struct inet6_dev *idev;
2068 struct inet6_ifaddr * ifp;
2069
2070 /* ::1 */
2071
2072 ASSERT_RTNL();
2073
2074 if ((idev = ipv6_find_idev(dev)) == NULL) {
2075 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2076 return;
2077 }
2078
2079 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2080 if (!IS_ERR(ifp)) {
2081 spin_lock_bh(&ifp->lock);
2082 ifp->flags &= ~IFA_F_TENTATIVE;
2083 spin_unlock_bh(&ifp->lock);
2084 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2085 in6_ifa_put(ifp);
2086 }
2087}
2088
2089static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2090{
2091 struct inet6_ifaddr * ifp;
2092
2093 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
2094 if (!IS_ERR(ifp)) {
2095 addrconf_dad_start(ifp, 0);
2096 in6_ifa_put(ifp);
2097 }
2098}
2099
2100static void addrconf_dev_config(struct net_device *dev)
2101{
2102 struct in6_addr addr;
2103 struct inet6_dev * idev;
2104
2105 ASSERT_RTNL();
2106
2107 if ((dev->type != ARPHRD_ETHER) &&
2108 (dev->type != ARPHRD_FDDI) &&
2109 (dev->type != ARPHRD_IEEE802_TR) &&
2110 (dev->type != ARPHRD_ARCNET) &&
2111 (dev->type != ARPHRD_INFINIBAND)) {
2112 /* Alas, we support only Ethernet autoconfiguration. */
2113 return;
2114 }
2115
2116 idev = addrconf_add_dev(dev);
2117 if (idev == NULL)
2118 return;
2119
2120 memset(&addr, 0, sizeof(struct in6_addr));
2121 addr.s6_addr32[0] = htonl(0xFE800000);
2122
2123 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2124 addrconf_add_linklocal(idev, &addr);
2125}
2126
2127static void addrconf_sit_config(struct net_device *dev)
2128{
2129 struct inet6_dev *idev;
2130
2131 ASSERT_RTNL();
2132
2133 /*
2134 * Configure the tunnel with one of our IPv4
2135 * addresses... we should configure all of
2136 * our v4 addrs in the tunnel
2137 */
2138
2139 if ((idev = ipv6_find_idev(dev)) == NULL) {
2140 printk(KERN_DEBUG "init sit: add_dev failed\n");
2141 return;
2142 }
2143
2144 sit_add_v4_addrs(idev);
2145
2146 if (dev->flags&IFF_POINTOPOINT) {
2147 addrconf_add_mroute(dev);
2148 addrconf_add_lroute(dev);
2149 } else
2150 sit_route_add(dev);
2151}
2152
2153static inline int
2154ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2155{
2156 struct in6_addr lladdr;
2157
2158 if (!ipv6_get_lladdr(link_dev, &lladdr)) {
2159 addrconf_add_linklocal(idev, &lladdr);
2160 return 0;
2161 }
2162 return -1;
2163}
2164
2165static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2166{
2167 struct net_device *link_dev;
2168
2169 /* first try to inherit the link-local address from the link device */
2170 if (idev->dev->iflink &&
2171 (link_dev = __dev_get_by_index(idev->dev->iflink))) {
2172 if (!ipv6_inherit_linklocal(idev, link_dev))
2173 return;
2174 }
2175 /* then try to inherit it from any device */
2176 for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
2177 if (!ipv6_inherit_linklocal(idev, link_dev))
2178 return;
2179 }
2180 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2181}
2182
2183/*
2184 * Autoconfigure tunnel with a link-local address so routing protocols,
2185 * DHCPv6, MLD etc. can be run over the virtual link
2186 */
2187
2188static void addrconf_ip6_tnl_config(struct net_device *dev)
2189{
2190 struct inet6_dev *idev;
2191
2192 ASSERT_RTNL();
2193
2194 if ((idev = addrconf_add_dev(dev)) == NULL) {
2195 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2196 return;
2197 }
2198 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2199}
2200
2201static int addrconf_notify(struct notifier_block *this, unsigned long event,
2202 void * data)
2203{
2204 struct net_device *dev = (struct net_device *) data;
2205 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2206 int run_pending = 0;
1da177e4
LT		 2207
2208 switch(event) {
2209 case NETDEV_UP:
3c21edbd
YH		 2210 case NETDEV_CHANGE:
2211 if (event == NETDEV_UP) {
2212 if (!netif_carrier_ok(dev)) {
2213 /* device is not ready yet. */
2214 printk(KERN_INFO
2215 "ADDRCONF(NETDEV_UP): %s: "
2216 "link is not ready\n",
2217 dev->name);
2218 break;
2219 }
99081049
KS		 2220
2221 if (idev)
2222 idev->if_flags |= IF_READY;
3c21edbd
YH		 2223 } else {
2224 if (!netif_carrier_ok(dev)) {
2225 /* device is still not ready. */
2226 break;
2227 }
2228
2229 if (idev) {
2230 if (idev->if_flags & IF_READY) {
2231 /* device is already configured. */
2232 break;
2233 }
2234 idev->if_flags |= IF_READY;
2235 }
2236
2237 printk(KERN_INFO
2238 "ADDRCONF(NETDEV_CHANGE): %s: "
2239 "link becomes ready\n",
2240 dev->name);
2241
c5e33bdd 2242 run_pending = 1;
3c21edbd
YH		 2243 }
2244
1da177e4
LT		 2245 switch(dev->type) {
2246 case ARPHRD_SIT:
2247 addrconf_sit_config(dev);
2248 break;
2249 case ARPHRD_TUNNEL6:
2250 addrconf_ip6_tnl_config(dev);
2251 break;
2252 case ARPHRD_LOOPBACK:
2253 init_loopback(dev);
2254 break;
2255
2256 default:
2257 addrconf_dev_config(dev);
2258 break;
2259 };
2260 if (idev) {
c5e33bdd
YH		 2261 if (run_pending)
2262 addrconf_dad_run(idev);
2263
1da177e4
LT		 2264 /* If the MTU changed during the interface down, when the
2265 interface up, the changed MTU must be reflected in the
2266 idev as well as routers.
2267 */
2268 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2269 rt6_mtu_change(dev, dev->mtu);
2270 idev->cnf.mtu6 = dev->mtu;
2271 }
2272 idev->tstamp = jiffies;
2273 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2274 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2275 stop IPv6 on this interface.
2276 */
2277 if (dev->mtu < IPV6_MIN_MTU)
2278 addrconf_ifdown(dev, event != NETDEV_DOWN);
2279 }
2280 break;
2281
2282 case NETDEV_CHANGEMTU:
2283 if ( idev && dev->mtu >= IPV6_MIN_MTU) {
2284 rt6_mtu_change(dev, dev->mtu);
2285 idev->cnf.mtu6 = dev->mtu;
2286 break;
2287 }
2288
2289 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2290
2291 case NETDEV_DOWN:
2292 case NETDEV_UNREGISTER:
2293 /*
2294 * Remove all addresses from this interface.
2295 */
2296 addrconf_ifdown(dev, event != NETDEV_DOWN);
2297 break;
3c21edbd 2298
1da177e4
LT		 2299 case NETDEV_CHANGENAME:
2300#ifdef CONFIG_SYSCTL
2301 if (idev) {
2302 addrconf_sysctl_unregister(&idev->cnf);
2303 neigh_sysctl_unregister(idev->nd_parms);
2304 neigh_sysctl_register(dev, idev->nd_parms,
2305 NET_IPV6, NET_IPV6_NEIGH, "ipv6",
2306 &ndisc_ifinfo_sysctl_change,
2307 NULL);
2308 addrconf_sysctl_register(idev, &idev->cnf);
2309 }
2310#endif
2311 break;
2312 };
2313
2314 return NOTIFY_OK;
2315}
2316
2317/*
2318 * addrconf module should be notified of a device going up
2319 */
2320static struct notifier_block ipv6_dev_notf = {
2321 .notifier_call = addrconf_notify,
2322 .priority = 0
2323};
2324
2325static int addrconf_ifdown(struct net_device *dev, int how)
2326{
2327 struct inet6_dev *idev;
2328 struct inet6_ifaddr *ifa, **bifa;
2329 int i;
2330
2331 ASSERT_RTNL();
2332
2333 if (dev == &loopback_dev && how == 1)
2334 how = 0;
2335
2336 rt6_ifdown(dev);
2337 neigh_ifdown(&nd_tbl, dev);
2338
2339 idev = __in6_dev_get(dev);
2340 if (idev == NULL)
2341 return -ENODEV;
2342
2343 /* Step 1: remove reference to ipv6 device from parent device.
2344 Do not dev_put!
2345 */
2346 if (how == 1) {
1da177e4 2347 idev->dead = 1;
8814c4b5
YH		 2348
2349 /* protected by rtnl_lock */
2350 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2351
2352 /* Step 1.5: remove snmp6 entry */
2353 snmp6_unregister_dev(idev);
2354
2355 }
2356
2357 /* Step 2: clear hash table */
2358 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2359 bifa = &inet6_addr_lst[i];
2360
2361 write_lock_bh(&addrconf_hash_lock);
2362 while ((ifa = *bifa) != NULL) {
2363 if (ifa->idev == idev) {
2364 *bifa = ifa->lst_next;
2365 ifa->lst_next = NULL;
2366 addrconf_del_timer(ifa);
2367 in6_ifa_put(ifa);
2368 continue;
2369 }
2370 bifa = &ifa->lst_next;
2371 }
2372 write_unlock_bh(&addrconf_hash_lock);
2373 }
2374
2375 write_lock_bh(&idev->lock);
2376
2377 /* Step 3: clear flags for stateless addrconf */
2378 if (how != 1)
3c21edbd 2379 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2380
2381 /* Step 4: clear address list */
2382#ifdef CONFIG_IPV6_PRIVACY
2383 if (how == 1 && del_timer(&idev->regen_timer))
2384 in6_dev_put(idev);
2385
2386 /* clear tempaddr list */
2387 while ((ifa = idev->tempaddr_list) != NULL) {
2388 idev->tempaddr_list = ifa->tmp_next;
2389 ifa->tmp_next = NULL;
2390 ifa->dead = 1;
2391 write_unlock_bh(&idev->lock);
2392 spin_lock_bh(&ifa->lock);
2393
2394 if (ifa->ifpub) {
2395 in6_ifa_put(ifa->ifpub);
2396 ifa->ifpub = NULL;
2397 }
2398 spin_unlock_bh(&ifa->lock);
2399 in6_ifa_put(ifa);
2400 write_lock_bh(&idev->lock);
2401 }
2402#endif
2403 while ((ifa = idev->addr_list) != NULL) {
2404 idev->addr_list = ifa->if_next;
2405 ifa->if_next = NULL;
2406 ifa->dead = 1;
2407 addrconf_del_timer(ifa);
2408 write_unlock_bh(&idev->lock);
2409
2410 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2411 in6_ifa_put(ifa);
2412
2413 write_lock_bh(&idev->lock);
2414 }
2415 write_unlock_bh(&idev->lock);
2416
2417 /* Step 5: Discard multicast list */
2418
2419 if (how == 1)
2420 ipv6_mc_destroy_dev(idev);
2421 else
2422 ipv6_mc_down(idev);
2423
2424 /* Step 5: netlink notification of this interface */
2425 idev->tstamp = jiffies;
979ad663 2426 inet6_ifinfo_notify(RTM_DELLINK, idev);
1da177e4
LT		 2427
2428 /* Shot the device (if unregistered) */
2429
2430 if (how == 1) {
2431#ifdef CONFIG_SYSCTL
2432 addrconf_sysctl_unregister(&idev->cnf);
2433 neigh_sysctl_unregister(idev->nd_parms);
2434#endif
2435 neigh_parms_release(&nd_tbl, idev->nd_parms);
2436 neigh_ifdown(&nd_tbl, dev);
2437 in6_dev_put(idev);
2438 }
2439 return 0;
2440}
2441
2442static void addrconf_rs_timer(unsigned long data)
2443{
2444 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2445
2446 if (ifp->idev->cnf.forwarding)
2447 goto out;
2448
2449 if (ifp->idev->if_flags & IF_RA_RCVD) {
2450 /*
2451 * Announcement received after solicitation
2452 * was sent
2453 */
2454 goto out;
2455 }
2456
2457 spin_lock(&ifp->lock);
2458 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2459 struct in6_addr all_routers;
2460
2461 /* The wait after the last probe can be shorter */
2462 addrconf_mod_timer(ifp, AC_RS,
2463 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2464 ifp->idev->cnf.rtr_solicit_delay :
2465 ifp->idev->cnf.rtr_solicit_interval);
2466 spin_unlock(&ifp->lock);
2467
2468 ipv6_addr_all_routers(&all_routers);
2469
2470 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2471 } else {
2472 spin_unlock(&ifp->lock);
2473 /*
2474 * Note: we do not support deprecated "all on-link"
2475 * assumption any longer.
2476 */
2477 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2478 ifp->idev->dev->name);
2479 }
2480
2481out:
2482 in6_ifa_put(ifp);
2483}
2484
2485/*
2486 * Duplicate Address Detection
2487 */
3c21edbd
YH		 2488static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2489{
2490 unsigned long rand_num;
2491 struct inet6_dev *idev = ifp->idev;
2492
2493 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2494 ifp->probes = idev->cnf.dad_transmits;
2495 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2496}
2497
e431b8c0 2498static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2499{
2500 struct inet6_dev *idev = ifp->idev;
2501 struct net_device *dev = idev->dev;
1da177e4
LT		 2502
2503 addrconf_join_solict(dev, &ifp->addr);
2504
2505 if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
2506 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
2507 flags);
2508
2509 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2510
2511 read_lock_bh(&idev->lock);
2512 if (ifp->dead)
2513 goto out;
2514 spin_lock_bh(&ifp->lock);
2515
2516 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
2517 !(ifp->flags&IFA_F_TENTATIVE)) {
2518 ifp->flags &= ~IFA_F_TENTATIVE;
2519 spin_unlock_bh(&ifp->lock);
2520 read_unlock_bh(&idev->lock);
2521
2522 addrconf_dad_completed(ifp);
2523 return;
2524 }
2525
6732bade 2526 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2527 spin_unlock_bh(&ifp->lock);
6732bade 2528 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2529 /*
2530 * If the defice is not ready:
2531 * - keep it tentative if it is a permanent address.
2532 * - otherwise, kill it.
2533 */
2534 in6_ifa_hold(ifp);
2535 addrconf_dad_stop(ifp);
6732bade 2536 return;
3c21edbd 2537 }
6732bade
YH		 2538 addrconf_dad_kick(ifp);
2539 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2540out:
2541 read_unlock_bh(&idev->lock);
2542}
2543
2544static void addrconf_dad_timer(unsigned long data)
2545{
2546 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2547 struct inet6_dev *idev = ifp->idev;
2548 struct in6_addr unspec;
2549 struct in6_addr mcaddr;
2550
2551 read_lock_bh(&idev->lock);
2552 if (idev->dead) {
2553 read_unlock_bh(&idev->lock);
2554 goto out;
2555 }
2556 spin_lock_bh(&ifp->lock);
2557 if (ifp->probes == 0) {
2558 /*
2559 * DAD was successful
2560 */
2561
2562 ifp->flags &= ~IFA_F_TENTATIVE;
2563 spin_unlock_bh(&ifp->lock);
2564 read_unlock_bh(&idev->lock);
2565
2566 addrconf_dad_completed(ifp);
2567
2568 goto out;
2569 }
2570
2571 ifp->probes--;
2572 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2573 spin_unlock_bh(&ifp->lock);
2574 read_unlock_bh(&idev->lock);
2575
2576 /* send a neighbour solicitation for our addr */
2577 memset(&unspec, 0, sizeof(unspec));
2578 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2579 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2580out:
2581 in6_ifa_put(ifp);
2582}
2583
2584static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2585{
2586 struct net_device * dev = ifp->idev->dev;
2587
2588 /*
2589 * Configure the address for reception. Now it is valid.
2590 */
2591
2592 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2593
2594 /* If added prefix is link local and forwarding is off,
2595 start sending router solicitations.
2596 */
2597
2598 if (ifp->idev->cnf.forwarding == 0 &&
2599 ifp->idev->cnf.rtr_solicits > 0 &&
2600 (dev->flags&IFF_LOOPBACK) == 0 &&
2601 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2602 struct in6_addr all_routers;
2603
2604 ipv6_addr_all_routers(&all_routers);
2605
2606 /*
2607 * If a host as already performed a random delay
2608 * [...] as part of DAD [...] there is no need
2609 * to delay again before sending the first RS
2610 */
2611 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2612
2613 spin_lock_bh(&ifp->lock);
2614 ifp->probes = 1;
2615 ifp->idev->if_flags |= IF_RS_SENT;
2616 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2617 spin_unlock_bh(&ifp->lock);
2618 }
2619}
2620
c5e33bdd
YH		 2621static void addrconf_dad_run(struct inet6_dev *idev) {
2622 struct inet6_ifaddr *ifp;
2623
2624 read_lock_bh(&idev->lock);
2625 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2626 spin_lock_bh(&ifp->lock);
2627 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2628 spin_unlock_bh(&ifp->lock);
2629 continue;
2630 }
2631 spin_unlock_bh(&ifp->lock);
2632 addrconf_dad_kick(ifp);
2633 }
2634 read_unlock_bh(&idev->lock);
2635}
2636
1da177e4
LT		 2637#ifdef CONFIG_PROC_FS
2638struct if6_iter_state {
2639 int bucket;
2640};
2641
2642static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2643{
2644 struct inet6_ifaddr *ifa = NULL;
2645 struct if6_iter_state *state = seq->private;
2646
2647 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2648 ifa = inet6_addr_lst[state->bucket];
2649 if (ifa)
2650 break;
2651 }
2652 return ifa;
2653}
2654
2655static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2656{
2657 struct if6_iter_state *state = seq->private;
2658
2659 ifa = ifa->lst_next;
2660try_again:
2661 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2662 ifa = inet6_addr_lst[state->bucket];
2663 goto try_again;
2664 }
2665 return ifa;
2666}
2667
2668static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2669{
2670 struct inet6_ifaddr *ifa = if6_get_first(seq);
2671
2672 if (ifa)
2673 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2674 --pos;
2675 return pos ? NULL : ifa;
2676}
2677
2678static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
2679{
2680 read_lock_bh(&addrconf_hash_lock);
2681 return if6_get_idx(seq, *pos);
2682}
2683
2684static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2685{
2686 struct inet6_ifaddr *ifa;
2687
2688 ifa = if6_get_next(seq, v);
2689 ++*pos;
2690 return ifa;
2691}
2692
2693static void if6_seq_stop(struct seq_file *seq, void *v)
2694{
2695 read_unlock_bh(&addrconf_hash_lock);
2696}
2697
2698static int if6_seq_show(struct seq_file *seq, void *v)
2699{
2700 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2701 seq_printf(seq,
9343e79a 2702 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2703 NIP6(ifp->addr),
2704 ifp->idev->dev->ifindex,
2705 ifp->prefix_len,
2706 ifp->scope,
2707 ifp->flags,
2708 ifp->idev->dev->name);
2709 return 0;
2710}
2711
2712static struct seq_operations if6_seq_ops = {
2713 .start = if6_seq_start,
2714 .next = if6_seq_next,
2715 .show = if6_seq_show,
2716 .stop = if6_seq_stop,
2717};
2718
2719static int if6_seq_open(struct inode *inode, struct file *file)
2720{
2721 struct seq_file *seq;
2722 int rc = -ENOMEM;
322f74a4 2723 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
1da177e4
LT		 2724
2725 if (!s)
2726 goto out;
1da177e4
LT		 2727
2728 rc = seq_open(file, &if6_seq_ops);
2729 if (rc)
2730 goto out_kfree;
2731
2732 seq = file->private_data;
2733 seq->private = s;
2734out:
2735 return rc;
2736out_kfree:
2737 kfree(s);
2738 goto out;
2739}
2740
2741static struct file_operations if6_fops = {
2742 .owner = THIS_MODULE,
2743 .open = if6_seq_open,
2744 .read = seq_read,
2745 .llseek = seq_lseek,
2746 .release = seq_release_private,
2747};
2748
2749int __init if6_proc_init(void)
2750{
2751 if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
2752 return -ENOMEM;
2753 return 0;
2754}
2755
2756void if6_proc_exit(void)
2757{
2758 proc_net_remove("if_inet6");
2759}
2760#endif /* CONFIG_PROC_FS */
2761
2762/*
2763 * Periodic address status verification
2764 */
2765
2766static void addrconf_verify(unsigned long foo)
2767{
2768 struct inet6_ifaddr *ifp;
2769 unsigned long now, next;
2770 int i;
2771
2772 spin_lock_bh(&addrconf_verify_lock);
2773 now = jiffies;
2774 next = now + ADDR_CHECK_FREQUENCY;
2775
2776 del_timer(&addr_chk_timer);
2777
2778 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2779
2780restart:
5d5780df 2781 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2782 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2783 unsigned long age;
2784#ifdef CONFIG_IPV6_PRIVACY
2785 unsigned long regen_advance;
2786#endif
2787
2788 if (ifp->flags & IFA_F_PERMANENT)
2789 continue;
2790
2791 spin_lock(&ifp->lock);
2792 age = (now - ifp->tstamp) / HZ;
2793
2794#ifdef CONFIG_IPV6_PRIVACY
2795 regen_advance = ifp->idev->cnf.regen_max_retry *
2796 ifp->idev->cnf.dad_transmits *
2797 ifp->idev->nd_parms->retrans_time / HZ;
2798#endif
2799
8f27ebb9
YH		 2800 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2801 age >= ifp->valid_lft) {
1da177e4
LT		 2802 spin_unlock(&ifp->lock);
2803 in6_ifa_hold(ifp);
5d5780df 2804 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2805 ipv6_del_addr(ifp);
2806 goto restart;
8f27ebb9
YH		 2807 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2808 spin_unlock(&ifp->lock);
2809 continue;
1da177e4
LT		 2810 } else if (age >= ifp->prefered_lft) {
2811 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2812 int deprecate = 0;
2813
2814 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2815 deprecate = 1;
2816 ifp->flags |= IFA_F_DEPRECATED;
2817 }
2818
2819 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2820 next = ifp->tstamp + ifp->valid_lft * HZ;
2821
2822 spin_unlock(&ifp->lock);
2823
2824 if (deprecate) {
2825 in6_ifa_hold(ifp);
5d5780df 2826 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2827
2828 ipv6_ifa_notify(0, ifp);
2829 in6_ifa_put(ifp);
2830 goto restart;
2831 }
2832#ifdef CONFIG_IPV6_PRIVACY
2833 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2834 !(ifp->flags&IFA_F_TENTATIVE)) {
2835 if (age >= ifp->prefered_lft - regen_advance) {
2836 struct inet6_ifaddr *ifpub = ifp->ifpub;
2837 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2838 next = ifp->tstamp + ifp->prefered_lft * HZ;
2839 if (!ifp->regen_count && ifpub) {
2840 ifp->regen_count++;
2841 in6_ifa_hold(ifp);
2842 in6_ifa_hold(ifpub);
2843 spin_unlock(&ifp->lock);
5d5780df 2844 read_unlock(&addrconf_hash_lock);
291d809b
HY		 2845 spin_lock(&ifpub->lock);
2846 ifpub->regen_count = 0;
2847 spin_unlock(&ifpub->lock);
1da177e4
LT		 2848 ipv6_create_tempaddr(ifpub, ifp);
2849 in6_ifa_put(ifpub);
2850 in6_ifa_put(ifp);
2851 goto restart;
2852 }
2853 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
2854 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
2855 spin_unlock(&ifp->lock);
2856#endif
2857 } else {
2858 /* ifp->prefered_lft <= ifp->valid_lft */
2859 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2860 next = ifp->tstamp + ifp->prefered_lft * HZ;
2861 spin_unlock(&ifp->lock);
2862 }
2863 }
5d5780df 2864 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2865 }
2866
2867 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
2868 add_timer(&addr_chk_timer);
2869 spin_unlock_bh(&addrconf_verify_lock);
2870}
2871
461d8837
TG		 2872static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
2873{
2874 struct in6_addr *pfx = NULL;
2875
2876 if (addr)
2877 pfx = nla_data(addr);
2878
2879 if (local) {
2880 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
2881 pfx = NULL;
2882 else
2883 pfx = nla_data(local);
2884 }
2885
2886 return pfx;
2887}
2888
2889static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
2890 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
2891 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
2892 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
2893};
2894
1da177e4
LT		 2895static int
2896inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2897{
b933f716
TG		 2898 struct ifaddrmsg *ifm;
2899 struct nlattr *tb[IFA_MAX+1];
1da177e4 2900 struct in6_addr *pfx;
b933f716 2901 int err;
1da177e4 2902
b933f716
TG		 2903 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2904 if (err < 0)
2905 return err;
2906
2907 ifm = nlmsg_data(nlh);
2908 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 2909 if (pfx == NULL)
2910 return -EINVAL;
2911
2912 return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
2913}
2914
7198f8ce
TG		 2915static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 prefered_lft,
2916 u32 valid_lft)
081bba5b 2917{
081bba5b
NT		 2918 int ifa_flags = 0;
2919
081bba5b
NT		 2920 if (!valid_lft || (prefered_lft > valid_lft))
2921 return -EINVAL;
2922
081bba5b
NT		 2923 if (valid_lft == INFINITY_LIFE_TIME)
2924 ifa_flags = IFA_F_PERMANENT;
2925 else if (valid_lft >= 0x7FFFFFFF/HZ)
2926 valid_lft = 0x7FFFFFFF/HZ;
2927
2928 if (prefered_lft == 0)
2929 ifa_flags = IFA_F_DEPRECATED;
2930 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
2931 (prefered_lft != INFINITY_LIFE_TIME))
2932 prefered_lft = 0x7FFFFFFF/HZ;
2933
2934 spin_lock_bh(&ifp->lock);
2935 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED|IFA_F_PERMANENT)) | ifa_flags;
2936
2937 ifp->tstamp = jiffies;
2938 ifp->valid_lft = valid_lft;
2939 ifp->prefered_lft = prefered_lft;
2940
2941 spin_unlock_bh(&ifp->lock);
2942 if (!(ifp->flags&IFA_F_TENTATIVE))
2943 ipv6_ifa_notify(0, ifp);
081bba5b
NT		 2944
2945 addrconf_verify(0);
2946
2947 return 0;
2948}
2949
1da177e4
LT		 2950static int
2951inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2952{
461d8837
TG		 2953 struct ifaddrmsg *ifm;
2954 struct nlattr *tb[IFA_MAX+1];
1da177e4 2955 struct in6_addr *pfx;
7198f8ce
TG		 2956 struct inet6_ifaddr *ifa;
2957 struct net_device *dev;
461d8837
TG		 2958 u32 valid_lft, preferred_lft;
2959 int err;
1da177e4 2960
461d8837
TG		 2961 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
2962 if (err < 0)
2963 return err;
2964
2965 ifm = nlmsg_data(nlh);
2966 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 2967 if (pfx == NULL)
2968 return -EINVAL;
2969
461d8837 2970 if (tb[IFA_CACHEINFO]) {
0778769d 2971 struct ifa_cacheinfo *ci;
461d8837
TG		 2972
2973 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 2974 valid_lft = ci->ifa_valid;
461d8837
TG		 2975 preferred_lft = ci->ifa_prefered;
2976 } else {
2977 preferred_lft = INFINITY_LIFE_TIME;
2978 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 2979 }
2980
7198f8ce
TG		 2981 dev = __dev_get_by_index(ifm->ifa_index);
2982 if (dev == NULL)
2983 return -ENODEV;
2984
2985 ifa = ipv6_get_ifaddr(pfx, dev, 1);
2986 if (ifa == NULL) {
2987 /*
2988 * It would be best to check for !NLM_F_CREATE here but
2989 * userspace alreay relies on not having to provide this.
2990 */
2991 return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
2992 preferred_lft, valid_lft);
081bba5b
NT		 2993 }
2994
7198f8ce
TG		 2995 if (nlh->nlmsg_flags & NLM_F_EXCL ||
2996 !(nlh->nlmsg_flags & NLM_F_REPLACE))
2997 err = -EEXIST;
2998 else
2999 err = inet6_addr_modify(ifa, preferred_lft, valid_lft);
3000
3001 in6_ifa_put(ifa);
3002
3003 return err;
1da177e4
LT		 3004}
3005
101bb229
TG		 3006static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3007 u8 scope, int ifindex)
3008{
3009 struct ifaddrmsg *ifm;
3010
3011 ifm = nlmsg_data(nlh);
3012 ifm->ifa_family = AF_INET6;
3013 ifm->ifa_prefixlen = prefixlen;
3014 ifm->ifa_flags = flags;
3015 ifm->ifa_scope = scope;
3016 ifm->ifa_index = ifindex;
3017}
3018
85486af0
TG		 3019static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3020 unsigned long tstamp, u32 preferred, u32 valid)
3021{
3022 struct ifa_cacheinfo ci;
3023
3024 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3025 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3026 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3027 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3028 ci.ifa_prefered = preferred;
3029 ci.ifa_valid = valid;
3030
3031 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3032}
3033
101bb229
TG		 3034static inline int rt_scope(int ifa_scope)
3035{
3036 if (ifa_scope & IFA_HOST)
3037 return RT_SCOPE_HOST;
3038 else if (ifa_scope & IFA_LINK)
3039 return RT_SCOPE_LINK;
3040 else if (ifa_scope & IFA_SITE)
3041 return RT_SCOPE_SITE;
3042 else
3043 return RT_SCOPE_UNIVERSE;
3044}
3045
0ab6803b
TG		 3046static inline int inet6_ifaddr_msgsize(void)
3047{
3048 return nlmsg_total_size(sizeof(struct ifaddrmsg) +
3049 nla_total_size(16) +
3050 nla_total_size(sizeof(struct ifa_cacheinfo)) +
3051 128);
3052}
c5396a31 3053
1da177e4 3054static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3055 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3056{
1da177e4 3057 struct nlmsghdr *nlh;
85486af0 3058 u32 preferred, valid;
1da177e4 3059
0ab6803b
TG		 3060 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3061 if (nlh == NULL)
3062 return -ENOBUFS;
3063
101bb229
TG		 3064 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3065 ifa->idev->dev->ifindex);
3066
1da177e4 3067 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3068 preferred = ifa->prefered_lft;
3069 valid = ifa->valid_lft;
3070 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3071 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3072 preferred -= tval;
3073 if (valid != INFINITY_LIFE_TIME)
3074 valid -= tval;
1da177e4
LT		 3075 }
3076 } else {
85486af0
TG		 3077 preferred = INFINITY_LIFE_TIME;
3078 valid = INFINITY_LIFE_TIME;
3079 }
3080
0ab6803b
TG		 3081 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
3082 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
3083 return nlmsg_cancel(skb, nlh);
1da177e4 3084
0ab6803b 3085 return nlmsg_end(skb, nlh);
1da177e4
LT		 3086}
3087
3088static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3089 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3090{
1da177e4 3091 struct nlmsghdr *nlh;
101bb229
TG		 3092 u8 scope = RT_SCOPE_UNIVERSE;
3093 int ifindex = ifmca->idev->dev->ifindex;
3094
3095 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3096 scope = RT_SCOPE_SITE;
1da177e4 3097
0ab6803b
TG		 3098 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3099 if (nlh == NULL)
3100 return -ENOBUFS;
85486af0 3101
0ab6803b
TG		 3102 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3103 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3104 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
85486af0 3105 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
0ab6803b 3106 return nlmsg_cancel(skb, nlh);
85486af0 3107
0ab6803b 3108 return nlmsg_end(skb, nlh);
1da177e4
LT		 3109}
3110
3111static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3112 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3113{
1da177e4 3114 struct nlmsghdr *nlh;
101bb229
TG		 3115 u8 scope = RT_SCOPE_UNIVERSE;
3116 int ifindex = ifaca->aca_idev->dev->ifindex;
3117
3118 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3119 scope = RT_SCOPE_SITE;
1da177e4 3120
0ab6803b
TG		 3121 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3122 if (nlh == NULL)
3123 return -ENOBUFS;
85486af0 3124
0ab6803b
TG		 3125 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3126 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3127 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
85486af0 3128 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
0ab6803b 3129 return nlmsg_cancel(skb, nlh);
1da177e4 3130
0ab6803b 3131 return nlmsg_end(skb, nlh);
1da177e4
LT		 3132}
3133
3134enum addr_type_t
3135{
3136 UNICAST_ADDR,
3137 MULTICAST_ADDR,
3138 ANYCAST_ADDR,
3139};
3140
3141static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3142 enum addr_type_t type)
3143{
3144 int idx, ip_idx;
3145 int s_idx, s_ip_idx;
3146 int err = 1;
3147 struct net_device *dev;
3148 struct inet6_dev *idev = NULL;
3149 struct inet6_ifaddr *ifa;
3150 struct ifmcaddr6 *ifmca;
3151 struct ifacaddr6 *ifaca;
3152
3153 s_idx = cb->args[0];
3154 s_ip_idx = ip_idx = cb->args[1];
3155 read_lock(&dev_base_lock);
3156
3157 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
3158 if (idx < s_idx)
3159 continue;
3160 if (idx > s_idx)
3161 s_ip_idx = 0;
3162 ip_idx = 0;
3163 if ((idev = in6_dev_get(dev)) == NULL)
3164 continue;
3165 read_lock_bh(&idev->lock);
3166 switch (type) {
3167 case UNICAST_ADDR:
ae9cda5d 3168 /* unicast address incl. temp addr */
1da177e4
LT		 3169 for (ifa = idev->addr_list; ifa;
3170 ifa = ifa->if_next, ip_idx++) {
3171 if (ip_idx < s_ip_idx)
3172 continue;
3173 if ((err = inet6_fill_ifaddr(skb, ifa,
3174 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3175 cb->nlh->nlmsg_seq, RTM_NEWADDR,
3176 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3177 goto done;
3178 }
1da177e4
LT		 3179 break;
3180 case MULTICAST_ADDR:
3181 /* multicast address */
3182 for (ifmca = idev->mc_list; ifmca;
3183 ifmca = ifmca->next, ip_idx++) {
3184 if (ip_idx < s_ip_idx)
3185 continue;
3186 if ((err = inet6_fill_ifmcaddr(skb, ifmca,
3187 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3188 cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
3189 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3190 goto done;
3191 }
3192 break;
3193 case ANYCAST_ADDR:
3194 /* anycast address */
3195 for (ifaca = idev->ac_list; ifaca;
3196 ifaca = ifaca->aca_next, ip_idx++) {
3197 if (ip_idx < s_ip_idx)
3198 continue;
3199 if ((err = inet6_fill_ifacaddr(skb, ifaca,
3200 NETLINK_CB(cb->skb).pid,
b6544c0b
JHS		 3201 cb->nlh->nlmsg_seq, RTM_GETANYCAST,
3202 NLM_F_MULTI)) <= 0)
1da177e4
LT		 3203 goto done;
3204 }
3205 break;
3206 default:
3207 break;
3208 }
3209 read_unlock_bh(&idev->lock);
3210 in6_dev_put(idev);
3211 }
3212done:
3213 if (err <= 0) {
3214 read_unlock_bh(&idev->lock);
3215 in6_dev_put(idev);
3216 }
3217 read_unlock(&dev_base_lock);
3218 cb->args[0] = idx;
3219 cb->args[1] = ip_idx;
3220 return skb->len;
3221}
3222
3223static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3224{
3225 enum addr_type_t type = UNICAST_ADDR;
3226 return inet6_dump_addr(skb, cb, type);
3227}
3228
3229static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3230{
3231 enum addr_type_t type = MULTICAST_ADDR;
3232 return inet6_dump_addr(skb, cb, type);
3233}
3234
3235
3236static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3237{
3238 enum addr_type_t type = ANYCAST_ADDR;
3239 return inet6_dump_addr(skb, cb, type);
3240}
3241
1b29fc2c
TG		 3242static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3243 void *arg)
6c223828 3244{
1b29fc2c
TG		 3245 struct ifaddrmsg *ifm;
3246 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3247 struct in6_addr *addr = NULL;
3248 struct net_device *dev = NULL;
3249 struct inet6_ifaddr *ifa;
3250 struct sk_buff *skb;
6c223828
NT		 3251 int err;
3252
1b29fc2c
TG		 3253 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3254 if (err < 0)
3255 goto errout;
3256
3257 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3258 if (addr == NULL) {
3259 err = -EINVAL;
3260 goto errout;
6c223828 3261 }
6c223828 3262
1b29fc2c 3263 ifm = nlmsg_data(nlh);
6c223828
NT		 3264 if (ifm->ifa_index)
3265 dev = __dev_get_by_index(ifm->ifa_index);
3266
1b29fc2c
TG		 3267 if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
3268 err = -EADDRNOTAVAIL;
3269 goto errout;
3270 }
6c223828 3271
0ab6803b 3272 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3273 err = -ENOBUFS;
1b29fc2c 3274 goto errout_ifa;
6c223828
NT		 3275 }
3276
6c223828
NT		 3277 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3278 nlh->nlmsg_seq, RTM_NEWADDR, 0);
3279 if (err < 0) {
1b29fc2c
TG		 3280 kfree_skb(skb);
3281 goto errout_ifa;
6c223828
NT		 3282 }
3283
2942e900 3284 err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
1b29fc2c 3285errout_ifa:
6c223828 3286 in6_ifa_put(ifa);
1b29fc2c 3287errout:
6c223828 3288 return err;
6c223828
NT		 3289}
3290
1da177e4
LT		 3291static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3292{
3293 struct sk_buff *skb;
5d620266 3294 int err = -ENOBUFS;
1da177e4 3295
0ab6803b 3296 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3297 if (skb == NULL)
3298 goto errout;
3299
3300 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
3301 if (err < 0) {
1da177e4 3302 kfree_skb(skb);
5d620266 3303 goto errout;
1da177e4 3304 }
5d620266
TG		 3305
3306 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3307errout:
3308 if (err < 0)
3309 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3310}
3311
3312static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3313 __s32 *array, int bytes)
3314{
3315 memset(array, 0, bytes);
3316 array[DEVCONF_FORWARDING] = cnf->forwarding;
3317 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3318 array[DEVCONF_MTU6] = cnf->mtu6;
3319 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3320 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3321 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3322 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3323 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3324 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3325 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3326 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3327#ifdef CONFIG_IPV6_PRIVACY
3328 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3329 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3330 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3331 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3332 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3333#endif
3334 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3335 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3336 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3337#ifdef CONFIG_IPV6_ROUTER_PREF
3338 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3339 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
09c884d4
YH		 3340#ifdef CONFIV_IPV6_ROUTE_INFO
3341 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3342#endif
930d6ff2 3343#endif
fbea49e1 3344 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
1da177e4
LT		 3345}
3346
c5396a31
YH		 3347/* Maximum length of ifinfomsg attributes */
3348#define INET6_IFINFO_RTA_SPACE \
3349 RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \
3350 RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \
3351 RTA_SPACE(sizeof(u32)) /* MTU */ + \
3352 RTA_SPACE(sizeof(int)) /* LINK */ + \
3353 RTA_SPACE(0) /* PROTINFO */ + \
3354 RTA_SPACE(sizeof(u32)) /* FLAGS */ + \
3355 RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \
3356 RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */
3357
1da177e4 3358static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3359 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 3360{
3361 struct net_device *dev = idev->dev;
3362 __s32 *array = NULL;
3363 struct ifinfomsg *r;
3364 struct nlmsghdr *nlh;
3365 unsigned char *b = skb->tail;
3366 struct rtattr *subattr;
3367 __u32 mtu = dev->mtu;
3368 struct ifla_cacheinfo ci;
3369
b6544c0b 3370 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
1da177e4
LT		 3371 r = NLMSG_DATA(nlh);
3372 r->ifi_family = AF_INET6;
9ef1d4c7 3373 r->__ifi_pad = 0;
1da177e4
LT		 3374 r->ifi_type = dev->type;
3375 r->ifi_index = dev->ifindex;
3376 r->ifi_flags = dev_get_flags(dev);
3377 r->ifi_change = 0;
3378
3379 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
3380
3381 if (dev->addr_len)
3382 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
3383
3384 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
3385 if (dev->ifindex != dev->iflink)
3386 RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
3387
3388 subattr = (struct rtattr*)skb->tail;
3389
3390 RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
3391
3392 /* return the device flags */
3393 RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
3394
3395 /* return interface cacheinfo */
3396 ci.max_reasm_len = IPV6_MAXPLEN;
3397 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3398 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3399 ci.reachable_time = idev->nd_parms->reachable_time;
3400 ci.retrans_time = idev->nd_parms->retrans_time;
3401 RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3402
3403 /* return the device sysctl params */
3404 if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
3405 goto rtattr_failure;
3406 ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
3407 RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
3408
3409 /* XXX - Statistics/MC not implemented */
3410 subattr->rta_len = skb->tail - (u8*)subattr;
3411
3412 nlh->nlmsg_len = skb->tail - b;
3413 kfree(array);
3414 return skb->len;
3415
3416nlmsg_failure:
3417rtattr_failure:
a51482bd 3418 kfree(array);
1da177e4
LT		 3419 skb_trim(skb, b - skb->data);
3420 return -1;
3421}
3422
3423static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3424{
3425 int idx, err;
3426 int s_idx = cb->args[0];
3427 struct net_device *dev;
3428 struct inet6_dev *idev;
3429
3430 read_lock(&dev_base_lock);
3431 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
3432 if (idx < s_idx)
3433 continue;
3434 if ((idev = in6_dev_get(dev)) == NULL)
3435 continue;
3436 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3437 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3438 in6_dev_put(idev);
3439 if (err <= 0)
3440 break;
3441 }
3442 read_unlock(&dev_base_lock);
3443 cb->args[0] = idx;
3444
3445 return skb->len;
3446}
3447
3448void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3449{
3450 struct sk_buff *skb;
8d7a76c9
TG		 3451 int payload = sizeof(struct ifinfomsg) + INET6_IFINFO_RTA_SPACE;
3452 int err = -ENOBUFS;
1da177e4 3453
8d7a76c9
TG		 3454 skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC);
3455 if (skb == NULL)
3456 goto errout;
3457
3458 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
3459 if (err < 0) {
1da177e4 3460 kfree_skb(skb);
8d7a76c9 3461 goto errout;
1da177e4 3462 }
8d7a76c9
TG		 3463
3464 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3465errout:
3466 if (err < 0)
3467 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3468}
3469
c5396a31
YH		 3470/* Maximum length of prefix_cacheinfo attributes */
3471#define INET6_PREFIX_RTA_SPACE \
3472 RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \
3473 RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */
3474
1da177e4 3475static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b
JHS		 3476 struct prefix_info *pinfo, u32 pid, u32 seq,
3477 int event, unsigned int flags)
1da177e4
LT		 3478{
3479 struct prefixmsg *pmsg;
3480 struct nlmsghdr *nlh;
3481 unsigned char *b = skb->tail;
3482 struct prefix_cacheinfo ci;
3483
b6544c0b 3484 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
1da177e4
LT		 3485 pmsg = NLMSG_DATA(nlh);
3486 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3487 pmsg->prefix_pad1 = 0;
3488 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3489 pmsg->prefix_ifindex = idev->dev->ifindex;
3490 pmsg->prefix_len = pinfo->prefix_len;
3491 pmsg->prefix_type = pinfo->type;
8a47077a 3492 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3493
3494 pmsg->prefix_flags = 0;
3495 if (pinfo->onlink)
3496 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3497 if (pinfo->autoconf)
3498 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3499
3500 RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
3501
3502 ci.preferred_time = ntohl(pinfo->prefered);
3503 ci.valid_time = ntohl(pinfo->valid);
3504 RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
3505
3506 nlh->nlmsg_len = skb->tail - b;
3507 return skb->len;
3508
3509nlmsg_failure:
3510rtattr_failure:
3511 skb_trim(skb, b - skb->data);
3512 return -1;
3513}
3514
3515static void inet6_prefix_notify(int event, struct inet6_dev *idev,
3516 struct prefix_info *pinfo)
3517{
3518 struct sk_buff *skb;
8c384bfa
TG		 3519 int payload = sizeof(struct prefixmsg) + INET6_PREFIX_RTA_SPACE;
3520 int err = -ENOBUFS;
1da177e4 3521
8c384bfa
TG		 3522 skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC);
3523 if (skb == NULL)
3524 goto errout;
3525
3526 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
3527 if (err < 0) {
1da177e4 3528 kfree_skb(skb);
8c384bfa 3529 goto errout;
1da177e4 3530 }
8c384bfa
TG		 3531
3532 err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3533errout:
3534 if (err < 0)
3535 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3536}
3537
db46edc6 3538static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
1da177e4
LT		 3539 [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
3540 [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
3541 [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
6c223828
NT		 3542 [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr,
3543 .dumpit = inet6_dump_ifaddr, },
1da177e4
LT		 3544 [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
3545 [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
3546 [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
3547 [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
3548 [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
3549 .dumpit = inet6_dump_fib, },
8423a9aa 3550#ifdef CONFIG_IPV6_MULTIPLE_TABLES
101367c2 3551 [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, },
8423a9aa 3552#endif
1da177e4
LT		 3553};
3554
3555static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3556{
3557 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3558
3559 switch (event) {
3560 case RTM_NEWADDR:
40e22e8f 3561 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3562 if (ifp->idev->cnf.forwarding)
3563 addrconf_join_anycast(ifp);
3564 break;
3565 case RTM_DELADDR:
3566 if (ifp->idev->cnf.forwarding)
3567 addrconf_leave_anycast(ifp);
3568 addrconf_leave_solict(ifp->idev, &ifp->addr);
3569 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3570 if (ip6_del_rt(ifp->rt))
1da177e4 3571 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3572 break;
3573 }
3574}
3575
3576static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3577{
8814c4b5 3578 rcu_read_lock_bh();
1da177e4
LT		 3579 if (likely(ifp->idev->dead == 0))
3580 __ipv6_ifa_notify(event, ifp);
8814c4b5 3581 rcu_read_unlock_bh();
1da177e4
LT		 3582}
3583
3584#ifdef CONFIG_SYSCTL
3585
3586static
3587int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3588 void __user *buffer, size_t *lenp, loff_t *ppos)
3589{
3590 int *valp = ctl->data;
3591 int val = *valp;
3592 int ret;
3593
3594 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3595
3596 if (write && valp != &ipv6_devconf_dflt.forwarding) {
3597 if (valp != &ipv6_devconf.forwarding) {
3598 if ((!*valp) ^ (!val)) {
3599 struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
3600 if (idev == NULL)
3601 return ret;
3602 dev_forward_change(idev);
3603 }
3604 } else {
3605 ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
3606 addrconf_forward_change();
3607 }
3608 if (*valp)
3609 rt6_purge_dflt_routers();
3610 }
3611
3612 return ret;
3613}
3614
3615static int addrconf_sysctl_forward_strategy(ctl_table *table,
3616 int __user *name, int nlen,
3617 void __user *oldval,
3618 size_t __user *oldlenp,
3619 void __user *newval, size_t newlen,
3620 void **context)
3621{
3622 int *valp = table->data;
3623 int new;
3624
3625 if (!newval || !newlen)
3626 return 0;
3627 if (newlen != sizeof(int))
3628 return -EINVAL;
3629 if (get_user(new, (int __user *)newval))
3630 return -EFAULT;
3631 if (new == *valp)
3632 return 0;
3633 if (oldval && oldlenp) {
3634 size_t len;
3635 if (get_user(len, oldlenp))
3636 return -EFAULT;
3637 if (len) {
3638 if (len > table->maxlen)
3639 len = table->maxlen;
3640 if (copy_to_user(oldval, valp, len))
3641 return -EFAULT;
3642 if (put_user(len, oldlenp))
3643 return -EFAULT;
3644 }
3645 }
3646
3647 if (valp != &ipv6_devconf_dflt.forwarding) {
3648 if (valp != &ipv6_devconf.forwarding) {
3649 struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
3650 int changed;
3651 if (unlikely(idev == NULL))
3652 return -ENODEV;
3653 changed = (!*valp) ^ (!new);
3654 *valp = new;
3655 if (changed)
3656 dev_forward_change(idev);
3657 } else {
3658 *valp = new;
3659 addrconf_forward_change();
3660 }
3661
3662 if (*valp)
3663 rt6_purge_dflt_routers();
3664 } else
3665 *valp = new;
3666
3667 return 1;
3668}
3669
3670static struct addrconf_sysctl_table
3671{
3672 struct ctl_table_header *sysctl_header;
3673 ctl_table addrconf_vars[__NET_IPV6_MAX];
3674 ctl_table addrconf_dev[2];
3675 ctl_table addrconf_conf_dir[2];
3676 ctl_table addrconf_proto_dir[2];
3677 ctl_table addrconf_root_dir[2];
ab32ea5d 3678} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3679 .sysctl_header = NULL,
3680 .addrconf_vars = {
3681 {
3682 .ctl_name = NET_IPV6_FORWARDING,
3683 .procname = "forwarding",
3684 .data = &ipv6_devconf.forwarding,
3685 .maxlen = sizeof(int),
3686 .mode = 0644,
3687 .proc_handler = &addrconf_sysctl_forward,
3688 .strategy = &addrconf_sysctl_forward_strategy,
3689 },
3690 {
3691 .ctl_name = NET_IPV6_HOP_LIMIT,
3692 .procname = "hop_limit",
3693 .data = &ipv6_devconf.hop_limit,
3694 .maxlen = sizeof(int),
3695 .mode = 0644,
3696 .proc_handler = proc_dointvec,
3697 },
3698 {
3699 .ctl_name = NET_IPV6_MTU,
3700 .procname = "mtu",
3701 .data = &ipv6_devconf.mtu6,
3702 .maxlen = sizeof(int),
3703 .mode = 0644,
3704 .proc_handler = &proc_dointvec,
3705 },
3706 {
3707 .ctl_name = NET_IPV6_ACCEPT_RA,
3708 .procname = "accept_ra",
3709 .data = &ipv6_devconf.accept_ra,
3710 .maxlen = sizeof(int),
3711 .mode = 0644,
3712 .proc_handler = &proc_dointvec,
3713 },
3714 {
3715 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3716 .procname = "accept_redirects",
3717 .data = &ipv6_devconf.accept_redirects,
3718 .maxlen = sizeof(int),
3719 .mode = 0644,
3720 .proc_handler = &proc_dointvec,
3721 },
3722 {
3723 .ctl_name = NET_IPV6_AUTOCONF,
3724 .procname = "autoconf",
3725 .data = &ipv6_devconf.autoconf,
3726 .maxlen = sizeof(int),
3727 .mode = 0644,
3728 .proc_handler = &proc_dointvec,
3729 },
3730 {
3731 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3732 .procname = "dad_transmits",
3733 .data = &ipv6_devconf.dad_transmits,
3734 .maxlen = sizeof(int),
3735 .mode = 0644,
3736 .proc_handler = &proc_dointvec,
3737 },
3738 {
3739 .ctl_name = NET_IPV6_RTR_SOLICITS,
3740 .procname = "router_solicitations",
3741 .data = &ipv6_devconf.rtr_solicits,
3742 .maxlen = sizeof(int),
3743 .mode = 0644,
3744 .proc_handler = &proc_dointvec,
3745 },
3746 {
3747 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3748 .procname = "router_solicitation_interval",
3749 .data = &ipv6_devconf.rtr_solicit_interval,
3750 .maxlen = sizeof(int),
3751 .mode = 0644,
3752 .proc_handler = &proc_dointvec_jiffies,
3753 .strategy = &sysctl_jiffies,
3754 },
3755 {
3756 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3757 .procname = "router_solicitation_delay",
3758 .data = &ipv6_devconf.rtr_solicit_delay,
3759 .maxlen = sizeof(int),
3760 .mode = 0644,
3761 .proc_handler = &proc_dointvec_jiffies,
3762 .strategy = &sysctl_jiffies,
3763 },
3764 {
3765 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3766 .procname = "force_mld_version",
3767 .data = &ipv6_devconf.force_mld_version,
3768 .maxlen = sizeof(int),
3769 .mode = 0644,
3770 .proc_handler = &proc_dointvec,
3771 },
3772#ifdef CONFIG_IPV6_PRIVACY
3773 {
3774 .ctl_name = NET_IPV6_USE_TEMPADDR,
3775 .procname = "use_tempaddr",
3776 .data = &ipv6_devconf.use_tempaddr,
3777 .maxlen = sizeof(int),
3778 .mode = 0644,
3779 .proc_handler = &proc_dointvec,
3780 },
3781 {
3782 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3783 .procname = "temp_valid_lft",
3784 .data = &ipv6_devconf.temp_valid_lft,
3785 .maxlen = sizeof(int),
3786 .mode = 0644,
3787 .proc_handler = &proc_dointvec,
3788 },
3789 {
3790 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3791 .procname = "temp_prefered_lft",
3792 .data = &ipv6_devconf.temp_prefered_lft,
3793 .maxlen = sizeof(int),
3794 .mode = 0644,
3795 .proc_handler = &proc_dointvec,
3796 },
3797 {
3798 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3799 .procname = "regen_max_retry",
3800 .data = &ipv6_devconf.regen_max_retry,
3801 .maxlen = sizeof(int),
3802 .mode = 0644,
3803 .proc_handler = &proc_dointvec,
3804 },
3805 {
3806 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3807 .procname = "max_desync_factor",
3808 .data = &ipv6_devconf.max_desync_factor,
3809 .maxlen = sizeof(int),
3810 .mode = 0644,
3811 .proc_handler = &proc_dointvec,
3812 },
3813#endif
3814 {
3815 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3816 .procname = "max_addresses",
3817 .data = &ipv6_devconf.max_addresses,
3818 .maxlen = sizeof(int),
3819 .mode = 0644,
3820 .proc_handler = &proc_dointvec,
3821 },
65f5c7c1
YH		 3822 {
3823 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3824 .procname = "accept_ra_defrtr",
3825 .data = &ipv6_devconf.accept_ra_defrtr,
3826 .maxlen = sizeof(int),
3827 .mode = 0644,
3828 .proc_handler = &proc_dointvec,
3829 },
c4fd30eb
YH		 3830 {
3831 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3832 .procname = "accept_ra_pinfo",
3833 .data = &ipv6_devconf.accept_ra_pinfo,
3834 .maxlen = sizeof(int),
3835 .mode = 0644,
3836 .proc_handler = &proc_dointvec,
3837 },
930d6ff2
YH		 3838#ifdef CONFIG_IPV6_ROUTER_PREF
3839 {
3840 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3841 .procname = "accept_ra_rtr_pref",
3842 .data = &ipv6_devconf.accept_ra_rtr_pref,
3843 .maxlen = sizeof(int),
3844 .mode = 0644,
3845 .proc_handler = &proc_dointvec,
3846 },
52e16356
YH		 3847 {
3848 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3849 .procname = "router_probe_interval",
3850 .data = &ipv6_devconf.rtr_probe_interval,
3851 .maxlen = sizeof(int),
3852 .mode = 0644,
3853 .proc_handler = &proc_dointvec_jiffies,
3854 .strategy = &sysctl_jiffies,
3855 },
09c884d4
YH		 3856#ifdef CONFIV_IPV6_ROUTE_INFO
3857 {
3858 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3859 .procname = "accept_ra_rt_info_max_plen",
3860 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3861 .maxlen = sizeof(int),
3862 .mode = 0644,
3863 .proc_handler = &proc_dointvec,
3864 },
3865#endif
930d6ff2 3866#endif
fbea49e1
YH		 3867 {
3868 .ctl_name = NET_IPV6_PROXY_NDP,
3869 .procname = "proxy_ndp",
3870 .data = &ipv6_devconf.proxy_ndp,
3871 .maxlen = sizeof(int),
3872 .mode = 0644,
3873 .proc_handler = &proc_dointvec,
3874 },
1da177e4
LT		 3875 {
3876 .ctl_name = 0, /* sentinel */
3877 }
3878 },
3879 .addrconf_dev = {
3880 {
3881 .ctl_name = NET_PROTO_CONF_ALL,
3882 .procname = "all",
3883 .mode = 0555,
3884 .child = addrconf_sysctl.addrconf_vars,
3885 },
3886 {
3887 .ctl_name = 0, /* sentinel */
3888 }
3889 },
3890 .addrconf_conf_dir = {
3891 {
3892 .ctl_name = NET_IPV6_CONF,
3893 .procname = "conf",
3894 .mode = 0555,
3895 .child = addrconf_sysctl.addrconf_dev,
3896 },
3897 {
3898 .ctl_name = 0, /* sentinel */
3899 }
3900 },
3901 .addrconf_proto_dir = {
3902 {
3903 .ctl_name = NET_IPV6,
3904 .procname = "ipv6",
3905 .mode = 0555,
3906 .child = addrconf_sysctl.addrconf_conf_dir,
3907 },
3908 {
3909 .ctl_name = 0, /* sentinel */
3910 }
3911 },
3912 .addrconf_root_dir = {
3913 {
3914 .ctl_name = CTL_NET,
3915 .procname = "net",
3916 .mode = 0555,
3917 .child = addrconf_sysctl.addrconf_proto_dir,
3918 },
3919 {
3920 .ctl_name = 0, /* sentinel */
3921 }
3922 },
3923};
3924
3925static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
3926{
3927 int i;
3928 struct net_device *dev = idev ? idev->dev : NULL;
3929 struct addrconf_sysctl_table *t;
3930 char *dev_name = NULL;
3931
3932 t = kmalloc(sizeof(*t), GFP_KERNEL);
3933 if (t == NULL)
3934 return;
3935 memcpy(t, &addrconf_sysctl, sizeof(*t));
3936 for (i=0; t->addrconf_vars[i].data; i++) {
3937 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
3938 t->addrconf_vars[i].de = NULL;
3939 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
3940 }
3941 if (dev) {
3942 dev_name = dev->name;
3943 t->addrconf_dev[0].ctl_name = dev->ifindex;
3944 } else {
3945 dev_name = "default";
3946 t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
3947 }
3948
3949 /*
3950 * Make a copy of dev_name, because '.procname' is regarded as const
3951 * by sysctl and we wouldn't want anyone to change it under our feet
3952 * (see SIOCSIFNAME).
3953 */
543537bd 3954 dev_name = kstrdup(dev_name, GFP_KERNEL);
1da177e4
LT		 3955 if (!dev_name)
3956 goto free;
3957
3958 t->addrconf_dev[0].procname = dev_name;
3959
3960 t->addrconf_dev[0].child = t->addrconf_vars;
3961 t->addrconf_dev[0].de = NULL;
3962 t->addrconf_conf_dir[0].child = t->addrconf_dev;
3963 t->addrconf_conf_dir[0].de = NULL;
3964 t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
3965 t->addrconf_proto_dir[0].de = NULL;
3966 t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
3967 t->addrconf_root_dir[0].de = NULL;
3968
3969 t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
3970 if (t->sysctl_header == NULL)
3971 goto free_procname;
3972 else
3973 p->sysctl = t;
3974 return;
3975
3976 /* error path */
3977 free_procname:
3978 kfree(dev_name);
3979 free:
3980 kfree(t);
3981
3982 return;
3983}
3984
3985static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
3986{
3987 if (p->sysctl) {
3988 struct addrconf_sysctl_table *t = p->sysctl;
3989 p->sysctl = NULL;
3990 unregister_sysctl_table(t->sysctl_header);
3991 kfree(t->addrconf_dev[0].procname);
3992 kfree(t);
3993 }
3994}
3995
3996
3997#endif
3998
3999/*
4000 * Device notifier
4001 */
4002
4003int register_inet6addr_notifier(struct notifier_block *nb)
4004{
e041c683 4005 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4006}
4007
4008int unregister_inet6addr_notifier(struct notifier_block *nb)
4009{
e041c683 4010 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4011}
4012
4013/*
4014 * Init / cleanup code
4015 */
4016
4017int __init addrconf_init(void)
4018{
4019 int err = 0;
4020
4021 /* The addrconf netdev notifier requires that loopback_dev
4022 * has it's ipv6 private information allocated and setup
4023 * before it can bring up and give link-local addresses
4024 * to other devices which are up.
4025 *
4026 * Unfortunately, loopback_dev is not necessarily the first
4027 * entry in the global dev_base list of net devices. In fact,
4028 * it is likely to be the very last entry on that list.
4029 * So this causes the notifier registry below to try and
4030 * give link-local addresses to all devices besides loopback_dev
4031 * first, then loopback_dev, which cases all the non-loopback_dev
4032 * devices to fail to get a link-local address.
4033 *
4034 * So, as a temporary fix, allocate the ipv6 structure for
4035 * loopback_dev first by hand.
4036 * Longer term, all of the dependencies ipv6 has upon the loopback
4037 * device and it being up should be removed.
4038 */
4039 rtnl_lock();
4040 if (!ipv6_add_dev(&loopback_dev))
4041 err = -ENOMEM;
4042 rtnl_unlock();
4043 if (err)
4044 return err;
4045
c62dba90
HX		 4046 ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
4047
1da177e4
LT		 4048 register_netdevice_notifier(&ipv6_dev_notf);
4049
1da177e4
LT		 4050 addrconf_verify(0);
4051 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
4052#ifdef CONFIG_SYSCTL
4053 addrconf_sysctl.sysctl_header =
4054 register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
4055 addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
4056#endif
4057
4058 return 0;
4059}
4060
4061void __exit addrconf_cleanup(void)
4062{
4063 struct net_device *dev;
4064 struct inet6_dev *idev;
4065 struct inet6_ifaddr *ifa;
4066 int i;
4067
4068 unregister_netdevice_notifier(&ipv6_dev_notf);
4069
4070 rtnetlink_links[PF_INET6] = NULL;
4071#ifdef CONFIG_SYSCTL
4072 addrconf_sysctl_unregister(&ipv6_devconf_dflt);
4073 addrconf_sysctl_unregister(&ipv6_devconf);
4074#endif
4075
4076 rtnl_lock();
4077
4078 /*
4079 * clean dev list.
4080 */
4081
4082 for (dev=dev_base; dev; dev=dev->next) {
4083 if ((idev = __in6_dev_get(dev)) == NULL)
4084 continue;
4085 addrconf_ifdown(dev, 1);
4086 }
4087 addrconf_ifdown(&loopback_dev, 2);
4088
4089 /*
4090 * Check hash table.
4091 */
4092
4093 write_lock_bh(&addrconf_hash_lock);
4094 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4095 for (ifa=inet6_addr_lst[i]; ifa; ) {
4096 struct inet6_ifaddr *bifa;
4097
4098 bifa = ifa;
4099 ifa = ifa->lst_next;
4100 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4101 /* Do not free it; something is wrong.
4102 Now we can investigate it with debugger.
4103 */
4104 }
4105 }
4106 write_unlock_bh(&addrconf_hash_lock);
4107
4108 del_timer(&addr_chk_timer);
4109
4110 rtnl_unlock();
4111
1da177e4
LT		 4112#ifdef CONFIG_PROC_FS
4113 proc_net_remove("if_inet6");
4114#endif
4115}
Clone of davem's net-next-2.6 tree