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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
1da177e4 LT |
47 | #include <linux/net.h> |
48 | #include <linux/in6.h> | |
49 | #include <linux/netdevice.h> | |
1823730f | 50 | #include <linux/if_addr.h> |
1da177e4 LT |
51 | #include <linux/if_arp.h> |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 LT |
64 | |
65 | #include <net/sock.h> | |
66 | #include <net/snmp.h> | |
67 | ||
68 | #include <net/ipv6.h> | |
69 | #include <net/protocol.h> | |
70 | #include <net/ndisc.h> | |
71 | #include <net/ip6_route.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/tcp.h> | |
74 | #include <net/ip.h> | |
5d620266 | 75 | #include <net/netlink.h> |
1da177e4 LT |
76 | #include <linux/if_tunnel.h> |
77 | #include <linux/rtnetlink.h> | |
78 | ||
79 | #ifdef CONFIG_IPV6_PRIVACY | |
80 | #include <linux/random.h> | |
1da177e4 LT |
81 | #endif |
82 | ||
83 | #include <asm/uaccess.h> | |
7f7d9a6b | 84 | #include <asm/unaligned.h> |
1da177e4 LT |
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 | |
102 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
103 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
104 | #endif | |
105 | ||
106 | #ifdef CONFIG_IPV6_PRIVACY | |
107 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 108 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
109 | static void ipv6_regen_rndid(unsigned long data); |
110 | ||
111 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
112 | #endif |
113 | ||
114 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
115 | ||
116 | /* | |
117 | * Configured unicast address hash table | |
118 | */ | |
119 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
120 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
121 | ||
1da177e4 LT |
122 | static void addrconf_verify(unsigned long); |
123 | ||
8d06afab | 124 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
125 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
126 | ||
127 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
128 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
129 | ||
130 | static int addrconf_ifdown(struct net_device *dev, int how); | |
131 | ||
e431b8c0 | 132 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
133 | static void addrconf_dad_timer(unsigned long data); |
134 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 135 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
136 | static void addrconf_rs_timer(unsigned long data); |
137 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
138 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | ||
1ab1457c | 140 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
141 | struct prefix_info *pinfo); |
142 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
143 | ||
e041c683 | 144 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 145 | |
ab32ea5d | 146 | struct 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, |
0bcbc926 | 176 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
177 | }; |
178 | ||
ab32ea5d | 179 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
180 | .forwarding = 0, |
181 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
182 | .mtu6 = IPV6_MIN_MTU, | |
183 | .accept_ra = 1, | |
184 | .accept_redirects = 1, | |
185 | .autoconf = 1, | |
186 | .dad_transmits = 1, | |
187 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
188 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
189 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
190 | #ifdef CONFIG_IPV6_PRIVACY | |
191 | .use_tempaddr = 0, | |
192 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
193 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
194 | .regen_max_retry = REGEN_MAX_RETRY, | |
195 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
196 | #endif | |
197 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 198 | .accept_ra_defrtr = 1, |
c4fd30eb | 199 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
200 | #ifdef CONFIG_IPV6_ROUTER_PREF |
201 | .accept_ra_rtr_pref = 1, | |
52e16356 | 202 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
203 | #ifdef CONFIG_IPV6_ROUTE_INFO |
204 | .accept_ra_rt_info_max_plen = 0, | |
205 | #endif | |
930d6ff2 | 206 | #endif |
fbea49e1 | 207 | .proxy_ndp = 0, |
0bcbc926 | 208 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
209 | }; |
210 | ||
211 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 212 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 LT |
213 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
214 | ||
1da177e4 LT |
215 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
216 | { | |
217 | if (del_timer(&ifp->timer)) | |
218 | __in6_ifa_put(ifp); | |
219 | } | |
220 | ||
221 | enum addrconf_timer_t | |
222 | { | |
223 | AC_NONE, | |
224 | AC_DAD, | |
225 | AC_RS, | |
226 | }; | |
227 | ||
228 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
229 | enum addrconf_timer_t what, | |
230 | unsigned long when) | |
231 | { | |
232 | if (!del_timer(&ifp->timer)) | |
233 | in6_ifa_hold(ifp); | |
234 | ||
235 | switch (what) { | |
236 | case AC_DAD: | |
237 | ifp->timer.function = addrconf_dad_timer; | |
238 | break; | |
239 | case AC_RS: | |
240 | ifp->timer.function = addrconf_rs_timer; | |
241 | break; | |
242 | default:; | |
243 | } | |
244 | ifp->timer.expires = jiffies + when; | |
245 | add_timer(&ifp->timer); | |
246 | } | |
247 | ||
7f7d9a6b HX |
248 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
249 | { | |
250 | int err = -ENOMEM; | |
251 | ||
252 | if (!idev || !idev->dev) | |
253 | return -EINVAL; | |
254 | ||
255 | if (snmp_mib_init((void **)idev->stats.ipv6, | |
256 | sizeof(struct ipstats_mib), | |
257 | __alignof__(struct ipstats_mib)) < 0) | |
258 | goto err_ip; | |
259 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
260 | sizeof(struct icmpv6_mib), | |
261 | __alignof__(struct icmpv6_mib)) < 0) | |
262 | goto err_icmp; | |
263 | ||
264 | return 0; | |
265 | ||
266 | err_icmp: | |
267 | snmp_mib_free((void **)idev->stats.ipv6); | |
268 | err_ip: | |
269 | return err; | |
270 | } | |
271 | ||
272 | static int snmp6_free_dev(struct inet6_dev *idev) | |
273 | { | |
274 | snmp_mib_free((void **)idev->stats.icmpv6); | |
275 | snmp_mib_free((void **)idev->stats.ipv6); | |
276 | return 0; | |
277 | } | |
278 | ||
1da177e4 LT |
279 | /* Nobody refers to this device, we may destroy it. */ |
280 | ||
8814c4b5 YH |
281 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
282 | { | |
283 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
284 | kfree(idev); | |
285 | } | |
286 | ||
1da177e4 LT |
287 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
288 | { | |
289 | struct net_device *dev = idev->dev; | |
290 | BUG_TRAP(idev->addr_list==NULL); | |
291 | BUG_TRAP(idev->mc_list==NULL); | |
292 | #ifdef NET_REFCNT_DEBUG | |
293 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
294 | #endif | |
295 | dev_put(dev); | |
296 | if (!idev->dead) { | |
297 | printk("Freeing alive inet6 device %p\n", idev); | |
298 | return; | |
299 | } | |
300 | snmp6_free_dev(idev); | |
8814c4b5 | 301 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
302 | } |
303 | ||
7159039a YH |
304 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
305 | ||
1da177e4 LT |
306 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
307 | { | |
308 | struct inet6_dev *ndev; | |
d88ae4cc | 309 | struct in6_addr maddr; |
1da177e4 LT |
310 | |
311 | ASSERT_RTNL(); | |
312 | ||
313 | if (dev->mtu < IPV6_MIN_MTU) | |
314 | return NULL; | |
315 | ||
1ab1457c | 316 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 317 | |
1ab1457c YH |
318 | if (ndev == NULL) |
319 | return NULL; | |
322f74a4 IO |
320 | |
321 | rwlock_init(&ndev->lock); | |
322 | ndev->dev = dev; | |
323 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
324 | ndev->cnf.mtu6 = dev->mtu; | |
325 | ndev->cnf.sysctl = NULL; | |
326 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
327 | if (ndev->nd_parms == NULL) { | |
328 | kfree(ndev); | |
329 | return NULL; | |
330 | } | |
331 | /* We refer to the device */ | |
332 | dev_hold(dev); | |
1da177e4 | 333 | |
322f74a4 IO |
334 | if (snmp6_alloc_dev(ndev) < 0) { |
335 | ADBG((KERN_WARNING | |
336 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
337 | __FUNCTION__, dev->name)); | |
338 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
339 | ndev->dead = 1; | |
340 | in6_dev_finish_destroy(ndev); | |
341 | return NULL; | |
342 | } | |
1da177e4 | 343 | |
322f74a4 IO |
344 | if (snmp6_register_dev(ndev) < 0) { |
345 | ADBG((KERN_WARNING | |
346 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
347 | __FUNCTION__, dev->name)); | |
348 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
349 | ndev->dead = 1; | |
350 | in6_dev_finish_destroy(ndev); | |
351 | return NULL; | |
352 | } | |
353 | ||
354 | /* One reference from device. We must do this before | |
355 | * we invoke __ipv6_regen_rndid(). | |
356 | */ | |
357 | in6_dev_hold(ndev); | |
1da177e4 LT |
358 | |
359 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
360 | init_timer(&ndev->regen_timer); |
361 | ndev->regen_timer.function = ipv6_regen_rndid; | |
362 | ndev->regen_timer.data = (unsigned long) ndev; | |
363 | if ((dev->flags&IFF_LOOPBACK) || | |
364 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
365 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
366 | dev->type == ARPHRD_SIT || | |
367 | #endif | |
368 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
369 | printk(KERN_INFO |
370 | "%s: Disabled Privacy Extensions\n", | |
371 | dev->name); | |
372 | ndev->cnf.use_tempaddr = -1; | |
373 | } else { | |
374 | in6_dev_hold(ndev); | |
375 | ipv6_regen_rndid((unsigned long) ndev); | |
376 | } | |
1da177e4 LT |
377 | #endif |
378 | ||
53aadcc9 HX |
379 | if (netif_running(dev) && netif_carrier_ok(dev)) |
380 | ndev->if_flags |= IF_READY; | |
381 | ||
322f74a4 IO |
382 | ipv6_mc_init_dev(ndev); |
383 | ndev->tstamp = jiffies; | |
1da177e4 | 384 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
385 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
386 | NET_IPV6_NEIGH, "ipv6", | |
387 | &ndisc_ifinfo_sysctl_change, | |
388 | NULL); | |
389 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 390 | #endif |
30c4cf57 DS |
391 | /* protected by rtnl_lock */ |
392 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
393 | |
394 | /* Join all-node multicast group */ | |
395 | ipv6_addr_all_nodes(&maddr); | |
396 | ipv6_dev_mc_inc(dev, &maddr); | |
397 | ||
1da177e4 LT |
398 | return ndev; |
399 | } | |
400 | ||
401 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
402 | { | |
403 | struct inet6_dev *idev; | |
404 | ||
405 | ASSERT_RTNL(); | |
406 | ||
407 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
408 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
409 | return NULL; | |
410 | } | |
c5e33bdd | 411 | |
1da177e4 LT |
412 | if (dev->flags&IFF_UP) |
413 | ipv6_mc_up(idev); | |
414 | return idev; | |
415 | } | |
416 | ||
417 | #ifdef CONFIG_SYSCTL | |
418 | static void dev_forward_change(struct inet6_dev *idev) | |
419 | { | |
420 | struct net_device *dev; | |
421 | struct inet6_ifaddr *ifa; | |
422 | struct in6_addr addr; | |
423 | ||
424 | if (!idev) | |
425 | return; | |
426 | dev = idev->dev; | |
427 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
428 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 429 | |
1da177e4 LT |
430 | if (idev->cnf.forwarding) |
431 | ipv6_dev_mc_inc(dev, &addr); | |
432 | else | |
433 | ipv6_dev_mc_dec(dev, &addr); | |
434 | } | |
435 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
436 | if (ifa->flags&IFA_F_TENTATIVE) |
437 | continue; | |
1da177e4 LT |
438 | if (idev->cnf.forwarding) |
439 | addrconf_join_anycast(ifa); | |
440 | else | |
441 | addrconf_leave_anycast(ifa); | |
442 | } | |
443 | } | |
444 | ||
445 | ||
446 | static void addrconf_forward_change(void) | |
447 | { | |
448 | struct net_device *dev; | |
449 | struct inet6_dev *idev; | |
450 | ||
451 | read_lock(&dev_base_lock); | |
7562f876 | 452 | for_each_netdev(dev) { |
8814c4b5 | 453 | rcu_read_lock(); |
1da177e4 LT |
454 | idev = __in6_dev_get(dev); |
455 | if (idev) { | |
456 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
457 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
458 | if (changed) | |
459 | dev_forward_change(idev); | |
460 | } | |
8814c4b5 | 461 | rcu_read_unlock(); |
1da177e4 LT |
462 | } |
463 | read_unlock(&dev_base_lock); | |
464 | } | |
465 | #endif | |
466 | ||
467 | /* Nobody refers to this ifaddr, destroy it */ | |
468 | ||
469 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
470 | { | |
471 | BUG_TRAP(ifp->if_next==NULL); | |
472 | BUG_TRAP(ifp->lst_next==NULL); | |
473 | #ifdef NET_REFCNT_DEBUG | |
474 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
475 | #endif | |
476 | ||
477 | in6_dev_put(ifp->idev); | |
478 | ||
479 | if (del_timer(&ifp->timer)) | |
480 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
481 | ||
482 | if (!ifp->dead) { | |
483 | printk("Freeing alive inet6 address %p\n", ifp); | |
484 | return; | |
485 | } | |
486 | dst_release(&ifp->rt->u.dst); | |
487 | ||
488 | kfree(ifp); | |
489 | } | |
490 | ||
e55ffac6 BH |
491 | static void |
492 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
493 | { | |
494 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 495 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
496 | |
497 | /* | |
498 | * Each device address list is sorted in order of scope - | |
499 | * global before linklocal. | |
500 | */ | |
501 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
502 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 503 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
504 | break; |
505 | } | |
506 | ||
507 | ifp->if_next = *ifap; | |
508 | *ifap = ifp; | |
509 | } | |
510 | ||
1da177e4 LT |
511 | /* On success it returns ifp with increased reference count */ |
512 | ||
513 | static struct inet6_ifaddr * | |
514 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 515 | int scope, u32 flags) |
1da177e4 LT |
516 | { |
517 | struct inet6_ifaddr *ifa = NULL; | |
518 | struct rt6_info *rt; | |
519 | int hash; | |
520 | int err = 0; | |
521 | ||
8814c4b5 | 522 | rcu_read_lock_bh(); |
1da177e4 LT |
523 | if (idev->dead) { |
524 | err = -ENODEV; /*XXX*/ | |
525 | goto out2; | |
526 | } | |
527 | ||
528 | write_lock(&addrconf_hash_lock); | |
529 | ||
530 | /* Ignore adding duplicate addresses on an interface */ | |
531 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
532 | ADBG(("ipv6_add_addr: already assigned\n")); | |
533 | err = -EEXIST; | |
534 | goto out; | |
535 | } | |
536 | ||
322f74a4 | 537 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
538 | |
539 | if (ifa == NULL) { | |
540 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
541 | err = -ENOBUFS; | |
542 | goto out; | |
543 | } | |
544 | ||
545 | rt = addrconf_dst_alloc(idev, addr, 0); | |
546 | if (IS_ERR(rt)) { | |
547 | err = PTR_ERR(rt); | |
548 | goto out; | |
549 | } | |
550 | ||
1da177e4 LT |
551 | ipv6_addr_copy(&ifa->addr, addr); |
552 | ||
553 | spin_lock_init(&ifa->lock); | |
554 | init_timer(&ifa->timer); | |
555 | ifa->timer.data = (unsigned long) ifa; | |
556 | ifa->scope = scope; | |
557 | ifa->prefix_len = pfxlen; | |
558 | ifa->flags = flags | IFA_F_TENTATIVE; | |
559 | ifa->cstamp = ifa->tstamp = jiffies; | |
560 | ||
57f5f544 KF |
561 | ifa->rt = rt; |
562 | ||
95c385b4 NH |
563 | /* |
564 | * part one of RFC 4429, section 3.3 | |
565 | * We should not configure an address as | |
566 | * optimistic if we do not yet know the link | |
567 | * layer address of our nexhop router | |
568 | */ | |
569 | ||
570 | if (rt->rt6i_nexthop == NULL) | |
571 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
572 | ||
1da177e4 LT |
573 | ifa->idev = idev; |
574 | in6_dev_hold(idev); | |
575 | /* For caller */ | |
576 | in6_ifa_hold(ifa); | |
577 | ||
578 | /* Add to big hash table */ | |
579 | hash = ipv6_addr_hash(addr); | |
580 | ||
581 | ifa->lst_next = inet6_addr_lst[hash]; | |
582 | inet6_addr_lst[hash] = ifa; | |
583 | in6_ifa_hold(ifa); | |
584 | write_unlock(&addrconf_hash_lock); | |
585 | ||
586 | write_lock(&idev->lock); | |
587 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 588 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
589 | |
590 | #ifdef CONFIG_IPV6_PRIVACY | |
591 | if (ifa->flags&IFA_F_TEMPORARY) { | |
592 | ifa->tmp_next = idev->tempaddr_list; | |
593 | idev->tempaddr_list = ifa; | |
594 | in6_ifa_hold(ifa); | |
595 | } | |
596 | #endif | |
597 | ||
1da177e4 LT |
598 | in6_ifa_hold(ifa); |
599 | write_unlock(&idev->lock); | |
600 | out2: | |
8814c4b5 | 601 | rcu_read_unlock_bh(); |
1da177e4 | 602 | |
fd92833a | 603 | if (likely(err == 0)) |
e041c683 | 604 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
605 | else { |
606 | kfree(ifa); | |
607 | ifa = ERR_PTR(err); | |
608 | } | |
609 | ||
610 | return ifa; | |
611 | out: | |
612 | write_unlock(&addrconf_hash_lock); | |
613 | goto out2; | |
614 | } | |
615 | ||
616 | /* This function wants to get referenced ifp and releases it before return */ | |
617 | ||
618 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
619 | { | |
620 | struct inet6_ifaddr *ifa, **ifap; | |
621 | struct inet6_dev *idev = ifp->idev; | |
622 | int hash; | |
623 | int deleted = 0, onlink = 0; | |
624 | unsigned long expires = jiffies; | |
625 | ||
626 | hash = ipv6_addr_hash(&ifp->addr); | |
627 | ||
628 | ifp->dead = 1; | |
629 | ||
630 | write_lock_bh(&addrconf_hash_lock); | |
631 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
632 | ifap = &ifa->lst_next) { | |
633 | if (ifa == ifp) { | |
634 | *ifap = ifa->lst_next; | |
635 | __in6_ifa_put(ifp); | |
636 | ifa->lst_next = NULL; | |
637 | break; | |
638 | } | |
639 | } | |
640 | write_unlock_bh(&addrconf_hash_lock); | |
641 | ||
642 | write_lock_bh(&idev->lock); | |
643 | #ifdef CONFIG_IPV6_PRIVACY | |
644 | if (ifp->flags&IFA_F_TEMPORARY) { | |
645 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
646 | ifap = &ifa->tmp_next) { | |
647 | if (ifa == ifp) { | |
648 | *ifap = ifa->tmp_next; | |
649 | if (ifp->ifpub) { | |
650 | in6_ifa_put(ifp->ifpub); | |
651 | ifp->ifpub = NULL; | |
652 | } | |
653 | __in6_ifa_put(ifp); | |
654 | ifa->tmp_next = NULL; | |
655 | break; | |
656 | } | |
657 | } | |
658 | } | |
659 | #endif | |
660 | ||
1d142804 | 661 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
662 | if (ifa == ifp) { |
663 | *ifap = ifa->if_next; | |
664 | __in6_ifa_put(ifp); | |
665 | ifa->if_next = NULL; | |
666 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
667 | break; | |
668 | deleted = 1; | |
1d142804 | 669 | continue; |
1da177e4 LT |
670 | } else if (ifp->flags & IFA_F_PERMANENT) { |
671 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
672 | ifp->prefix_len)) { | |
673 | if (ifa->flags & IFA_F_PERMANENT) { | |
674 | onlink = 1; | |
675 | if (deleted) | |
676 | break; | |
677 | } else { | |
678 | unsigned long lifetime; | |
679 | ||
680 | if (!onlink) | |
681 | onlink = -1; | |
682 | ||
683 | spin_lock(&ifa->lock); | |
684 | lifetime = min_t(unsigned long, | |
685 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
686 | if (time_before(expires, | |
687 | ifa->tstamp + lifetime * HZ)) | |
688 | expires = ifa->tstamp + lifetime * HZ; | |
689 | spin_unlock(&ifa->lock); | |
690 | } | |
691 | } | |
692 | } | |
1d142804 | 693 | ifap = &ifa->if_next; |
1da177e4 LT |
694 | } |
695 | write_unlock_bh(&idev->lock); | |
696 | ||
697 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
698 | ||
e041c683 | 699 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
700 | |
701 | addrconf_del_timer(ifp); | |
702 | ||
703 | /* | |
704 | * Purge or update corresponding prefix | |
705 | * | |
706 | * 1) we don't purge prefix here if address was not permanent. | |
707 | * prefix is managed by its own lifetime. | |
708 | * 2) if there're no addresses, delete prefix. | |
709 | * 3) if there're still other permanent address(es), | |
710 | * corresponding prefix is still permanent. | |
711 | * 4) otherwise, update prefix lifetime to the | |
712 | * longest valid lifetime among the corresponding | |
713 | * addresses on the device. | |
714 | * Note: subsequent RA will update lifetime. | |
715 | * | |
716 | * --yoshfuji | |
717 | */ | |
718 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
719 | struct in6_addr prefix; | |
720 | struct rt6_info *rt; | |
721 | ||
722 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
723 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
724 | ||
725 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
726 | if (onlink == 0) { | |
e0a1ad73 | 727 | ip6_del_rt(rt); |
1da177e4 LT |
728 | rt = NULL; |
729 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
730 | rt->rt6i_expires = expires; | |
731 | rt->rt6i_flags |= RTF_EXPIRES; | |
732 | } | |
733 | } | |
734 | dst_release(&rt->u.dst); | |
735 | } | |
736 | ||
737 | in6_ifa_put(ifp); | |
738 | } | |
739 | ||
740 | #ifdef CONFIG_IPV6_PRIVACY | |
741 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
742 | { | |
743 | struct inet6_dev *idev = ifp->idev; | |
744 | struct in6_addr addr, *tmpaddr; | |
745 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
746 | int tmp_plen; | |
747 | int ret = 0; | |
748 | int max_addresses; | |
95c385b4 | 749 | u32 addr_flags; |
1da177e4 LT |
750 | |
751 | write_lock(&idev->lock); | |
752 | if (ift) { | |
753 | spin_lock_bh(&ift->lock); | |
754 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
755 | spin_unlock_bh(&ift->lock); | |
756 | tmpaddr = &addr; | |
757 | } else { | |
758 | tmpaddr = NULL; | |
759 | } | |
760 | retry: | |
761 | in6_dev_hold(idev); | |
762 | if (idev->cnf.use_tempaddr <= 0) { | |
763 | write_unlock(&idev->lock); | |
764 | printk(KERN_INFO | |
765 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
766 | in6_dev_put(idev); | |
767 | ret = -1; | |
768 | goto out; | |
769 | } | |
770 | spin_lock_bh(&ifp->lock); | |
771 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
772 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
773 | spin_unlock_bh(&ifp->lock); | |
774 | write_unlock(&idev->lock); | |
775 | printk(KERN_WARNING | |
776 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
777 | in6_dev_put(idev); | |
778 | ret = -1; | |
779 | goto out; | |
780 | } | |
781 | in6_ifa_hold(ifp); | |
782 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
783 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
784 | spin_unlock_bh(&ifp->lock); | |
785 | write_unlock(&idev->lock); | |
786 | printk(KERN_WARNING | |
787 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
788 | in6_ifa_put(ifp); | |
789 | in6_dev_put(idev); | |
790 | ret = -1; | |
791 | goto out; | |
792 | } | |
793 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
794 | tmp_valid_lft = min_t(__u32, | |
795 | ifp->valid_lft, | |
796 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
797 | tmp_prefered_lft = min_t(__u32, |
798 | ifp->prefered_lft, | |
1da177e4 LT |
799 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
800 | tmp_plen = ifp->prefix_len; | |
801 | max_addresses = idev->cnf.max_addresses; | |
802 | tmp_cstamp = ifp->cstamp; | |
803 | tmp_tstamp = ifp->tstamp; | |
804 | spin_unlock_bh(&ifp->lock); | |
805 | ||
806 | write_unlock(&idev->lock); | |
95c385b4 NH |
807 | |
808 | addr_flags = IFA_F_TEMPORARY; | |
809 | /* set in addrconf_prefix_rcv() */ | |
810 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
811 | addr_flags |= IFA_F_OPTIMISTIC; | |
812 | ||
1da177e4 | 813 | ift = !max_addresses || |
1ab1457c | 814 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 815 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
816 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
817 | addr_flags) : NULL; | |
1da177e4 LT |
818 | if (!ift || IS_ERR(ift)) { |
819 | in6_ifa_put(ifp); | |
820 | in6_dev_put(idev); | |
821 | printk(KERN_INFO | |
822 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
823 | tmpaddr = &addr; | |
824 | write_lock(&idev->lock); | |
825 | goto retry; | |
826 | } | |
827 | ||
828 | spin_lock_bh(&ift->lock); | |
829 | ift->ifpub = ifp; | |
830 | ift->valid_lft = tmp_valid_lft; | |
831 | ift->prefered_lft = tmp_prefered_lft; | |
832 | ift->cstamp = tmp_cstamp; | |
833 | ift->tstamp = tmp_tstamp; | |
834 | spin_unlock_bh(&ift->lock); | |
835 | ||
836 | addrconf_dad_start(ift, 0); | |
837 | in6_ifa_put(ift); | |
838 | in6_dev_put(idev); | |
839 | out: | |
840 | return ret; | |
841 | } | |
842 | #endif | |
843 | ||
844 | /* | |
072047e4 | 845 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 846 | */ |
072047e4 YH |
847 | struct ipv6_saddr_score { |
848 | int addr_type; | |
849 | unsigned int attrs; | |
850 | int matchlen; | |
0d27b427 | 851 | int scope; |
072047e4 YH |
852 | unsigned int rule; |
853 | }; | |
854 | ||
855 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
856 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
857 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
858 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
859 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
860 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
861 | ||
b6f99a21 | 862 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 863 | { |
072047e4 YH |
864 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
865 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
866 | return 1; | |
867 | return 0; | |
1da177e4 LT |
868 | } |
869 | ||
072047e4 | 870 | /* static matching label */ |
b6f99a21 | 871 | static inline int ipv6_saddr_label(const struct in6_addr *addr, int type) |
072047e4 YH |
872 | { |
873 | /* | |
874 | * prefix (longest match) label | |
875 | * ----------------------------- | |
876 | * ::1/128 0 | |
877 | * ::/0 1 | |
878 | * 2002::/16 2 | |
879 | * ::/96 3 | |
880 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
881 | * fc00::/7 5 |
882 | * 2001::/32 6 | |
072047e4 YH |
883 | */ |
884 | if (type & IPV6_ADDR_LOOPBACK) | |
885 | return 0; | |
886 | else if (type & IPV6_ADDR_COMPATv4) | |
887 | return 3; | |
888 | else if (type & IPV6_ADDR_MAPPED) | |
889 | return 4; | |
102128e3 ŁS |
890 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
891 | return 6; | |
072047e4 YH |
892 | else if (addr->s6_addr16[0] == htons(0x2002)) |
893 | return 2; | |
102128e3 ŁS |
894 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
895 | return 5; | |
072047e4 YH |
896 | return 1; |
897 | } | |
1da177e4 | 898 | |
072047e4 | 899 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
900 | struct in6_addr *daddr, struct in6_addr *saddr) |
901 | { | |
072047e4 YH |
902 | struct ipv6_saddr_score hiscore; |
903 | struct inet6_ifaddr *ifa_result = NULL; | |
904 | int daddr_type = __ipv6_addr_type(daddr); | |
905 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
906 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
907 | struct net_device *dev; | |
1da177e4 | 908 | |
072047e4 | 909 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 910 | |
072047e4 | 911 | read_lock(&dev_base_lock); |
8814c4b5 | 912 | rcu_read_lock(); |
1da177e4 | 913 | |
7562f876 | 914 | for_each_netdev(dev) { |
072047e4 YH |
915 | struct inet6_dev *idev; |
916 | struct inet6_ifaddr *ifa; | |
917 | ||
918 | /* Rule 0: Candidate Source Address (section 4) | |
919 | * - multicast and link-local destination address, | |
920 | * the set of candidate source address MUST only | |
921 | * include addresses assigned to interfaces | |
922 | * belonging to the same link as the outgoing | |
923 | * interface. | |
924 | * (- For site-local destination addresses, the | |
925 | * set of candidate source addresses MUST only | |
926 | * include addresses assigned to interfaces | |
927 | * belonging to the same site as the outgoing | |
928 | * interface.) | |
929 | */ | |
930 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
931 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
932 | daddr_dev && dev != daddr_dev) | |
933 | continue; | |
1da177e4 | 934 | |
1da177e4 | 935 | idev = __in6_dev_get(dev); |
072047e4 YH |
936 | if (!idev) |
937 | continue; | |
938 | ||
939 | read_lock_bh(&idev->lock); | |
940 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
941 | struct ipv6_saddr_score score; | |
942 | ||
943 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
944 | ||
6b3ae80a YH |
945 | /* Rule 0: |
946 | * - Tentative Address (RFC2462 section 5.4) | |
947 | * - A tentative address is not considered | |
948 | * "assigned to an interface" in the traditional | |
95c385b4 | 949 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 950 | * - Candidate Source Address (section 4) |
072047e4 YH |
951 | * - In any case, anycast addresses, multicast |
952 | * addresses, and the unspecified address MUST | |
953 | * NOT be included in a candidate set. | |
954 | */ | |
95c385b4 NH |
955 | if ((ifa->flags & IFA_F_TENTATIVE) && |
956 | (!(ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 957 | continue; |
072047e4 YH |
958 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
959 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
960 | LIMIT_NETDEBUG(KERN_DEBUG | |
961 | "ADDRCONF: unspecified / multicast address" | |
962 | "assigned as unicast address on %s", | |
963 | dev->name); | |
964 | continue; | |
965 | } | |
966 | ||
967 | score.attrs = 0; | |
968 | score.matchlen = 0; | |
969 | score.scope = 0; | |
970 | score.rule = 0; | |
971 | ||
972 | if (ifa_result == NULL) { | |
973 | /* record it if the first available entry */ | |
974 | goto record_it; | |
975 | } | |
976 | ||
977 | /* Rule 1: Prefer same address */ | |
978 | if (hiscore.rule < 1) { | |
979 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
980 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
981 | hiscore.rule++; | |
982 | } | |
983 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
984 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
985 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
986 | score.rule = 1; | |
987 | goto record_it; | |
1da177e4 | 988 | } |
072047e4 YH |
989 | } else { |
990 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
991 | continue; | |
1da177e4 | 992 | } |
1da177e4 | 993 | |
072047e4 YH |
994 | /* Rule 2: Prefer appropriate scope */ |
995 | if (hiscore.rule < 2) { | |
996 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
997 | hiscore.rule++; | |
998 | } | |
999 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1000 | if (hiscore.scope < score.scope) { | |
1001 | if (hiscore.scope < daddr_scope) { | |
1002 | score.rule = 2; | |
1003 | goto record_it; | |
1004 | } else | |
1005 | continue; | |
1006 | } else if (score.scope < hiscore.scope) { | |
1007 | if (score.scope < daddr_scope) | |
e55ffac6 | 1008 | break; /* addresses sorted by scope */ |
072047e4 YH |
1009 | else { |
1010 | score.rule = 2; | |
1011 | goto record_it; | |
1012 | } | |
1013 | } | |
1da177e4 | 1014 | |
95c385b4 | 1015 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
072047e4 YH |
1016 | if (hiscore.rule < 3) { |
1017 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
95c385b4 NH |
1018 | (((ifa_result->flags & |
1019 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) | |
072047e4 YH |
1020 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1021 | hiscore.rule++; | |
1022 | } | |
1023 | if (ipv6_saddr_preferred(score.addr_type) || | |
95c385b4 NH |
1024 | (((ifa_result->flags & |
1025 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { | |
072047e4 YH |
1026 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1027 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1028 | score.rule = 3; | |
1029 | goto record_it; | |
1030 | } | |
1031 | } else { | |
1032 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1033 | continue; | |
1034 | } | |
1da177e4 | 1035 | |
3b9f9a1c | 1036 | /* Rule 4: Prefer home address */ |
59fbb3a6 | 1037 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
1038 | if (hiscore.rule < 4) { |
1039 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1040 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1041 | hiscore.rule++; | |
1042 | } | |
1043 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1044 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1045 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1046 | score.rule = 4; | |
1047 | goto record_it; | |
1048 | } | |
1049 | } else { | |
1050 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1051 | continue; | |
1052 | } | |
1053 | #else | |
220bbd74 YH |
1054 | if (hiscore.rule < 4) |
1055 | hiscore.rule++; | |
3b9f9a1c | 1056 | #endif |
072047e4 YH |
1057 | |
1058 | /* Rule 5: Prefer outgoing interface */ | |
1059 | if (hiscore.rule < 5) { | |
1060 | if (daddr_dev == NULL || | |
1061 | daddr_dev == ifa_result->idev->dev) | |
1062 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1063 | hiscore.rule++; | |
1064 | } | |
1065 | if (daddr_dev == NULL || | |
1066 | daddr_dev == ifa->idev->dev) { | |
1067 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1068 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1069 | score.rule = 5; | |
1070 | goto record_it; | |
1071 | } | |
1072 | } else { | |
1073 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1074 | continue; | |
1075 | } | |
1076 | ||
1077 | /* Rule 6: Prefer matching label */ | |
1078 | if (hiscore.rule < 6) { | |
1079 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1080 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1081 | hiscore.rule++; | |
1082 | } | |
1083 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1084 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1085 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1086 | score.rule = 6; | |
1087 | goto record_it; | |
1da177e4 | 1088 | } |
072047e4 YH |
1089 | } else { |
1090 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1091 | continue; | |
1092 | } | |
1093 | ||
44fd0261 | 1094 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1095 | /* Rule 7: Prefer public address |
1096 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1097 | */ | |
1098 | if (hiscore.rule < 7) { | |
1099 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1100 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1101 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1102 | hiscore.rule++; | |
1103 | } | |
1104 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1105 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1106 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1107 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1108 | score.rule = 7; | |
1109 | goto record_it; | |
1110 | } | |
1111 | } else { | |
1112 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1113 | continue; | |
1114 | } | |
5e2707fa YH |
1115 | #else |
1116 | if (hiscore.rule < 7) | |
1117 | hiscore.rule++; | |
44fd0261 | 1118 | #endif |
072047e4 | 1119 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1120 | if (hiscore.rule < 8) { |
072047e4 | 1121 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1122 | hiscore.rule++; |
1123 | } | |
072047e4 YH |
1124 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1125 | if (score.matchlen > hiscore.matchlen) { | |
1126 | score.rule = 8; | |
1127 | goto record_it; | |
1da177e4 | 1128 | } |
072047e4 YH |
1129 | #if 0 |
1130 | else if (score.matchlen < hiscore.matchlen) | |
1131 | continue; | |
1132 | #endif | |
1133 | ||
1134 | /* Final Rule: choose first available one */ | |
1135 | continue; | |
1136 | record_it: | |
1137 | if (ifa_result) | |
1138 | in6_ifa_put(ifa_result); | |
1139 | in6_ifa_hold(ifa); | |
1140 | ifa_result = ifa; | |
1141 | hiscore = score; | |
1da177e4 | 1142 | } |
072047e4 | 1143 | read_unlock_bh(&idev->lock); |
1da177e4 | 1144 | } |
8814c4b5 | 1145 | rcu_read_unlock(); |
1da177e4 LT |
1146 | read_unlock(&dev_base_lock); |
1147 | ||
072047e4 YH |
1148 | if (!ifa_result) |
1149 | return -EADDRNOTAVAIL; | |
1ab1457c | 1150 | |
072047e4 YH |
1151 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1152 | in6_ifa_put(ifa_result); | |
1153 | return 0; | |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | ||
1157 | int ipv6_get_saddr(struct dst_entry *dst, | |
1158 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1159 | { | |
7a3025b1 | 1160 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1161 | } |
1162 | ||
7159039a | 1163 | EXPORT_SYMBOL(ipv6_get_saddr); |
1da177e4 | 1164 | |
95c385b4 NH |
1165 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1166 | unsigned char banned_flags) | |
1da177e4 LT |
1167 | { |
1168 | struct inet6_dev *idev; | |
1169 | int err = -EADDRNOTAVAIL; | |
1170 | ||
8814c4b5 | 1171 | rcu_read_lock(); |
1da177e4 LT |
1172 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1173 | struct inet6_ifaddr *ifp; | |
1174 | ||
1175 | read_lock_bh(&idev->lock); | |
1176 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1177 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1178 | ipv6_addr_copy(addr, &ifp->addr); |
1179 | err = 0; | |
1180 | break; | |
1181 | } | |
1182 | } | |
1183 | read_unlock_bh(&idev->lock); | |
1184 | } | |
8814c4b5 | 1185 | rcu_read_unlock(); |
1da177e4 LT |
1186 | return err; |
1187 | } | |
1188 | ||
1189 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1190 | { | |
1191 | int cnt = 0; | |
1192 | struct inet6_ifaddr *ifp; | |
1193 | ||
1194 | read_lock_bh(&idev->lock); | |
1195 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1196 | cnt++; | |
1197 | read_unlock_bh(&idev->lock); | |
1198 | return cnt; | |
1199 | } | |
1200 | ||
1201 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1202 | { | |
1203 | struct inet6_ifaddr * ifp; | |
1204 | u8 hash = ipv6_addr_hash(addr); | |
1205 | ||
1206 | read_lock_bh(&addrconf_hash_lock); | |
1207 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1208 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1209 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1210 | if (dev == NULL || ifp->idev->dev == dev || | |
1211 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1212 | break; | |
1213 | } | |
1214 | } | |
1215 | read_unlock_bh(&addrconf_hash_lock); | |
1216 | return ifp != NULL; | |
1217 | } | |
1218 | ||
7159039a YH |
1219 | EXPORT_SYMBOL(ipv6_chk_addr); |
1220 | ||
1da177e4 LT |
1221 | static |
1222 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1223 | { | |
1224 | struct inet6_ifaddr * ifp; | |
1225 | u8 hash = ipv6_addr_hash(addr); | |
1226 | ||
1227 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1228 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1229 | if (dev == NULL || ifp->idev->dev == dev) | |
1230 | break; | |
1231 | } | |
1232 | } | |
1233 | return ifp != NULL; | |
1234 | } | |
1235 | ||
1236 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1237 | { | |
1238 | struct inet6_ifaddr * ifp; | |
1239 | u8 hash = ipv6_addr_hash(addr); | |
1240 | ||
1241 | read_lock_bh(&addrconf_hash_lock); | |
1242 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1243 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1244 | if (dev == NULL || ifp->idev->dev == dev || | |
1245 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1246 | in6_ifa_hold(ifp); | |
1247 | break; | |
1248 | } | |
1249 | } | |
1250 | } | |
1251 | read_unlock_bh(&addrconf_hash_lock); | |
1252 | ||
1253 | return ifp; | |
1254 | } | |
1255 | ||
1256 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1257 | { | |
1258 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1259 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1260 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1261 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1262 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1263 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1264 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1265 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1266 | ||
1267 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1268 | return 1; | |
1269 | ||
1270 | if (addr_type2 == IPV6_ADDR_ANY && | |
1271 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1272 | return 1; | |
1273 | ||
1274 | if (addr_type == IPV6_ADDR_ANY && | |
1275 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1276 | return 1; | |
1277 | ||
1278 | if (sk2_rcv_saddr6 && | |
1279 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1280 | return 1; | |
1281 | ||
1282 | if (addr_type == IPV6_ADDR_MAPPED && | |
1283 | !sk2_ipv6only && | |
1284 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1285 | return 1; | |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | /* Gets referenced address, destroys ifaddr */ | |
1291 | ||
9f5336e2 | 1292 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1293 | { |
1da177e4 LT |
1294 | if (ifp->flags&IFA_F_PERMANENT) { |
1295 | spin_lock_bh(&ifp->lock); | |
1296 | addrconf_del_timer(ifp); | |
1297 | ifp->flags |= IFA_F_TENTATIVE; | |
1298 | spin_unlock_bh(&ifp->lock); | |
1299 | in6_ifa_put(ifp); | |
1300 | #ifdef CONFIG_IPV6_PRIVACY | |
1301 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1302 | struct inet6_ifaddr *ifpub; | |
1303 | spin_lock_bh(&ifp->lock); | |
1304 | ifpub = ifp->ifpub; | |
1305 | if (ifpub) { | |
1306 | in6_ifa_hold(ifpub); | |
1307 | spin_unlock_bh(&ifp->lock); | |
1308 | ipv6_create_tempaddr(ifpub, ifp); | |
1309 | in6_ifa_put(ifpub); | |
1310 | } else { | |
1311 | spin_unlock_bh(&ifp->lock); | |
1312 | } | |
1313 | ipv6_del_addr(ifp); | |
1314 | #endif | |
1315 | } else | |
1316 | ipv6_del_addr(ifp); | |
1317 | } | |
1318 | ||
3c21edbd YH |
1319 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1320 | { | |
1321 | if (net_ratelimit()) | |
1322 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1323 | addrconf_dad_stop(ifp); | |
1324 | } | |
1da177e4 LT |
1325 | |
1326 | /* Join to solicited addr multicast group. */ | |
1327 | ||
1328 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1329 | { | |
1330 | struct in6_addr maddr; | |
1331 | ||
1332 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1333 | return; | |
1334 | ||
1335 | addrconf_addr_solict_mult(addr, &maddr); | |
1336 | ipv6_dev_mc_inc(dev, &maddr); | |
1337 | } | |
1338 | ||
1339 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1340 | { | |
1341 | struct in6_addr maddr; | |
1342 | ||
1343 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1344 | return; | |
1345 | ||
1346 | addrconf_addr_solict_mult(addr, &maddr); | |
1347 | __ipv6_dev_mc_dec(idev, &maddr); | |
1348 | } | |
1349 | ||
20380731 | 1350 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1351 | { |
1352 | struct in6_addr addr; | |
1353 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1354 | if (ipv6_addr_any(&addr)) | |
1355 | return; | |
1356 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1357 | } | |
1358 | ||
20380731 | 1359 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1360 | { |
1361 | struct in6_addr addr; | |
1362 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1363 | if (ipv6_addr_any(&addr)) | |
1364 | return; | |
1365 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1366 | } | |
1367 | ||
073a8e0e YH |
1368 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1369 | { | |
1370 | if (dev->addr_len != ETH_ALEN) | |
1371 | return -1; | |
1372 | memcpy(eui, dev->dev_addr, 3); | |
1373 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1374 | ||
1375 | /* | |
1376 | * The zSeries OSA network cards can be shared among various | |
1377 | * OS instances, but the OSA cards have only one MAC address. | |
1378 | * This leads to duplicate address conflicts in conjunction | |
1379 | * with IPv6 if more than one instance uses the same card. | |
1380 | * | |
1381 | * The driver for these cards can deliver a unique 16-bit | |
1382 | * identifier for each instance sharing the same card. It is | |
1383 | * placed instead of 0xFFFE in the interface identifier. The | |
1384 | * "u" bit of the interface identifier is not inverted in this | |
1385 | * case. Hence the resulting interface identifier has local | |
1386 | * scope according to RFC2373. | |
1387 | */ | |
1388 | if (dev->dev_id) { | |
1389 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1390 | eui[4] = dev->dev_id & 0xFF; | |
1391 | } else { | |
1392 | eui[3] = 0xFF; | |
1393 | eui[4] = 0xFE; | |
1394 | eui[0] ^= 2; | |
1395 | } | |
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1400 | { | |
1401 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1402 | if (dev->addr_len != ARCNET_ALEN) | |
1403 | return -1; | |
1404 | memset(eui, 0, 7); | |
1405 | eui[7] = *(u8*)dev->dev_addr; | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1410 | { | |
1411 | if (dev->addr_len != INFINIBAND_ALEN) | |
1412 | return -1; | |
1413 | memcpy(eui, dev->dev_addr + 12, 8); | |
1414 | eui[0] |= 2; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1da177e4 LT |
1418 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1419 | { | |
1420 | switch (dev->type) { | |
1421 | case ARPHRD_ETHER: | |
1422 | case ARPHRD_FDDI: | |
1423 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1424 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1425 | case ARPHRD_ARCNET: |
073a8e0e | 1426 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1427 | case ARPHRD_INFINIBAND: |
073a8e0e | 1428 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1429 | } |
1430 | return -1; | |
1431 | } | |
1432 | ||
1433 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1434 | { | |
1435 | int err = -1; | |
1436 | struct inet6_ifaddr *ifp; | |
1437 | ||
1438 | read_lock_bh(&idev->lock); | |
1439 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1440 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1441 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1442 | err = 0; | |
1443 | break; | |
1444 | } | |
1445 | } | |
1446 | read_unlock_bh(&idev->lock); | |
1447 | return err; | |
1448 | } | |
1449 | ||
1450 | #ifdef CONFIG_IPV6_PRIVACY | |
1451 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1452 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1453 | { | |
1da177e4 | 1454 | regen: |
955189ef | 1455 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1456 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1457 | |
1458 | /* | |
1459 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1460 | * check if generated address is not inappropriate | |
1461 | * | |
1462 | * - Reserved subnet anycast (RFC 2526) | |
1463 | * 11111101 11....11 1xxxxxxx | |
1464 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1465 | * 00-00-5E-FE-xx-xx-xx-xx | |
1466 | * - value 0 | |
1467 | * - XXX: already assigned to an address on the device | |
1468 | */ | |
1ab1457c | 1469 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1470 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1471 | (idev->rndid[7]&0x80)) | |
1472 | goto regen; | |
1473 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1474 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1475 | goto regen; | |
1476 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1477 | goto regen; | |
1478 | } | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | static void ipv6_regen_rndid(unsigned long data) | |
1484 | { | |
1485 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1486 | unsigned long expires; | |
1487 | ||
8814c4b5 | 1488 | rcu_read_lock_bh(); |
1da177e4 LT |
1489 | write_lock_bh(&idev->lock); |
1490 | ||
1491 | if (idev->dead) | |
1492 | goto out; | |
1493 | ||
1494 | if (__ipv6_regen_rndid(idev) < 0) | |
1495 | goto out; | |
1ab1457c | 1496 | |
1da177e4 | 1497 | expires = jiffies + |
1ab1457c | 1498 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1499 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1500 | if (time_before(expires, jiffies)) { | |
1501 | printk(KERN_WARNING | |
1502 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1503 | idev->dev->name); | |
1504 | goto out; | |
1505 | } | |
1506 | ||
1507 | if (!mod_timer(&idev->regen_timer, expires)) | |
1508 | in6_dev_hold(idev); | |
1509 | ||
1510 | out: | |
1511 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1512 | rcu_read_unlock_bh(); |
1da177e4 LT |
1513 | in6_dev_put(idev); |
1514 | } | |
1515 | ||
1516 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1517 | int ret = 0; | |
1518 | ||
1519 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1520 | ret = __ipv6_regen_rndid(idev); | |
1521 | return ret; | |
1522 | } | |
1523 | #endif | |
1524 | ||
1525 | /* | |
1526 | * Add prefix route. | |
1527 | */ | |
1528 | ||
1529 | static void | |
1530 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1531 | unsigned long expires, u32 flags) |
1da177e4 | 1532 | { |
86872cb5 TG |
1533 | struct fib6_config cfg = { |
1534 | .fc_table = RT6_TABLE_PREFIX, | |
1535 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1536 | .fc_ifindex = dev->ifindex, | |
1537 | .fc_expires = expires, | |
1538 | .fc_dst_len = plen, | |
1539 | .fc_flags = RTF_UP | flags, | |
1540 | }; | |
1da177e4 | 1541 | |
86872cb5 | 1542 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1543 | |
1544 | /* Prevent useless cloning on PtP SIT. | |
1545 | This thing is done here expecting that the whole | |
1546 | class of non-broadcast devices need not cloning. | |
1547 | */ | |
0be669bb | 1548 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1549 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1550 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1551 | #endif |
1da177e4 | 1552 | |
86872cb5 | 1553 | ip6_route_add(&cfg); |
1da177e4 LT |
1554 | } |
1555 | ||
1556 | /* Create "default" multicast route to the interface */ | |
1557 | ||
1558 | static void addrconf_add_mroute(struct net_device *dev) | |
1559 | { | |
86872cb5 TG |
1560 | struct fib6_config cfg = { |
1561 | .fc_table = RT6_TABLE_LOCAL, | |
1562 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1563 | .fc_ifindex = dev->ifindex, | |
1564 | .fc_dst_len = 8, | |
1565 | .fc_flags = RTF_UP, | |
1566 | }; | |
1567 | ||
1568 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1569 | ||
1570 | ip6_route_add(&cfg); | |
1da177e4 LT |
1571 | } |
1572 | ||
0be669bb | 1573 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1574 | static void sit_route_add(struct net_device *dev) |
1575 | { | |
86872cb5 TG |
1576 | struct fib6_config cfg = { |
1577 | .fc_table = RT6_TABLE_MAIN, | |
1578 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1579 | .fc_ifindex = dev->ifindex, | |
1580 | .fc_dst_len = 96, | |
1581 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1582 | }; | |
1da177e4 LT |
1583 | |
1584 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1585 | ip6_route_add(&cfg); |
1da177e4 | 1586 | } |
0be669bb | 1587 | #endif |
1da177e4 LT |
1588 | |
1589 | static void addrconf_add_lroute(struct net_device *dev) | |
1590 | { | |
1591 | struct in6_addr addr; | |
1592 | ||
1593 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1594 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1595 | } | |
1596 | ||
1597 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1598 | { | |
1599 | struct inet6_dev *idev; | |
1600 | ||
1601 | ASSERT_RTNL(); | |
1602 | ||
1603 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1604 | return NULL; | |
1605 | ||
1606 | /* Add default multicast route */ | |
1607 | addrconf_add_mroute(dev); | |
1608 | ||
1609 | /* Add link local route */ | |
1610 | addrconf_add_lroute(dev); | |
1611 | return idev; | |
1612 | } | |
1613 | ||
1614 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1615 | { | |
1616 | struct prefix_info *pinfo; | |
1617 | __u32 valid_lft; | |
1618 | __u32 prefered_lft; | |
1619 | int addr_type; | |
1620 | unsigned long rt_expires; | |
1621 | struct inet6_dev *in6_dev; | |
1622 | ||
1623 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1624 | |
1da177e4 LT |
1625 | if (len < sizeof(struct prefix_info)) { |
1626 | ADBG(("addrconf: prefix option too short\n")); | |
1627 | return; | |
1628 | } | |
1ab1457c | 1629 | |
1da177e4 LT |
1630 | /* |
1631 | * Validation checks ([ADDRCONF], page 19) | |
1632 | */ | |
1633 | ||
1634 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1635 | ||
1636 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1637 | return; | |
1638 | ||
1639 | valid_lft = ntohl(pinfo->valid); | |
1640 | prefered_lft = ntohl(pinfo->prefered); | |
1641 | ||
1642 | if (prefered_lft > valid_lft) { | |
1643 | if (net_ratelimit()) | |
1644 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1645 | return; | |
1646 | } | |
1647 | ||
1648 | in6_dev = in6_dev_get(dev); | |
1649 | ||
1650 | if (in6_dev == NULL) { | |
1651 | if (net_ratelimit()) | |
1652 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1653 | return; | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * Two things going on here: | |
1658 | * 1) Add routes for on-link prefixes | |
1659 | * 2) Configure prefixes with the auto flag set | |
1660 | */ | |
1661 | ||
1662 | /* Avoid arithmetic overflow. Really, we could | |
1663 | save rt_expires in seconds, likely valid_lft, | |
1664 | but it would require division in fib gc, that it | |
1665 | not good. | |
1666 | */ | |
1667 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1668 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1669 | else |
3dd4bc68 YH |
1670 | rt_expires = valid_lft * HZ; |
1671 | ||
1672 | /* | |
1673 | * We convert this (in jiffies) to clock_t later. | |
1674 | * Avoid arithmetic overflow there as well. | |
1675 | * Overflow can happen only if HZ < USER_HZ. | |
1676 | */ | |
1677 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1678 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1679 | |
1680 | if (pinfo->onlink) { | |
1681 | struct rt6_info *rt; | |
1682 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1683 | ||
1684 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1685 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1686 | if (valid_lft == 0) { | |
e0a1ad73 | 1687 | ip6_del_rt(rt); |
1da177e4 LT |
1688 | rt = NULL; |
1689 | } else { | |
3dd4bc68 | 1690 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1691 | } |
1692 | } | |
1693 | } else if (valid_lft) { | |
1694 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1695 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1696 | } |
1697 | if (rt) | |
1698 | dst_release(&rt->u.dst); | |
1699 | } | |
1700 | ||
1701 | /* Try to figure out our local address for this prefix */ | |
1702 | ||
1703 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1704 | struct inet6_ifaddr * ifp; | |
1705 | struct in6_addr addr; | |
1706 | int create = 0, update_lft = 0; | |
1707 | ||
1708 | if (pinfo->prefix_len == 64) { | |
1709 | memcpy(&addr, &pinfo->prefix, 8); | |
1710 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1711 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1712 | in6_dev_put(in6_dev); | |
1713 | return; | |
1714 | } | |
1715 | goto ok; | |
1716 | } | |
1717 | if (net_ratelimit()) | |
1718 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1719 | pinfo->prefix_len); | |
1720 | in6_dev_put(in6_dev); | |
1721 | return; | |
1722 | ||
1723 | ok: | |
1724 | ||
1725 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1726 | ||
1727 | if (ifp == NULL && valid_lft) { | |
1728 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1729 | u32 addr_flags = 0; |
1730 | ||
1731 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1732 | if (in6_dev->cnf.optimistic_dad && | |
1733 | !ipv6_devconf.forwarding) | |
1734 | addr_flags = IFA_F_OPTIMISTIC; | |
1735 | #endif | |
1da177e4 LT |
1736 | |
1737 | /* Do not allow to create too much of autoconfigured | |
1738 | * addresses; this would be too easy way to crash kernel. | |
1739 | */ | |
1740 | if (!max_addresses || | |
1741 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1742 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1743 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1744 | addr_flags); | |
1da177e4 LT |
1745 | |
1746 | if (!ifp || IS_ERR(ifp)) { | |
1747 | in6_dev_put(in6_dev); | |
1748 | return; | |
1749 | } | |
1750 | ||
1751 | update_lft = create = 1; | |
1752 | ifp->cstamp = jiffies; | |
1753 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1754 | } | |
1755 | ||
1756 | if (ifp) { | |
1757 | int flags; | |
1758 | unsigned long now; | |
1759 | #ifdef CONFIG_IPV6_PRIVACY | |
1760 | struct inet6_ifaddr *ift; | |
1761 | #endif | |
1762 | u32 stored_lft; | |
1763 | ||
1764 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1765 | spin_lock(&ifp->lock); | |
1766 | now = jiffies; | |
1767 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1768 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1769 | else | |
1770 | stored_lft = 0; | |
1771 | if (!update_lft && stored_lft) { | |
1772 | if (valid_lft > MIN_VALID_LIFETIME || | |
1773 | valid_lft > stored_lft) | |
1774 | update_lft = 1; | |
1775 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1776 | /* valid_lft <= stored_lft is always true */ | |
1777 | /* XXX: IPsec */ | |
1778 | update_lft = 0; | |
1779 | } else { | |
1780 | valid_lft = MIN_VALID_LIFETIME; | |
1781 | if (valid_lft < prefered_lft) | |
1782 | prefered_lft = valid_lft; | |
1783 | update_lft = 1; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | if (update_lft) { | |
1788 | ifp->valid_lft = valid_lft; | |
1789 | ifp->prefered_lft = prefered_lft; | |
1790 | ifp->tstamp = now; | |
1791 | flags = ifp->flags; | |
1792 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1793 | spin_unlock(&ifp->lock); | |
1794 | ||
1795 | if (!(flags&IFA_F_TENTATIVE)) | |
1796 | ipv6_ifa_notify(0, ifp); | |
1797 | } else | |
1798 | spin_unlock(&ifp->lock); | |
1799 | ||
1800 | #ifdef CONFIG_IPV6_PRIVACY | |
1801 | read_lock_bh(&in6_dev->lock); | |
1802 | /* update all temporary addresses in the list */ | |
1803 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1804 | /* | |
1805 | * When adjusting the lifetimes of an existing | |
1806 | * temporary address, only lower the lifetimes. | |
1807 | * Implementations must not increase the | |
1808 | * lifetimes of an existing temporary address | |
1809 | * when processing a Prefix Information Option. | |
1810 | */ | |
1811 | spin_lock(&ift->lock); | |
1812 | flags = ift->flags; | |
1813 | if (ift->valid_lft > valid_lft && | |
1814 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1815 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1816 | if (ift->prefered_lft > prefered_lft && | |
1817 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1818 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1819 | spin_unlock(&ift->lock); | |
1820 | if (!(flags&IFA_F_TENTATIVE)) | |
1821 | ipv6_ifa_notify(0, ift); | |
1822 | } | |
1823 | ||
1824 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1825 | /* | |
1826 | * When a new public address is created as described in [ADDRCONF], | |
1827 | * also create a new temporary address. | |
1828 | */ | |
1ab1457c | 1829 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1830 | ipv6_create_tempaddr(ifp, NULL); |
1831 | } else { | |
1832 | read_unlock_bh(&in6_dev->lock); | |
1833 | } | |
1834 | #endif | |
1835 | in6_ifa_put(ifp); | |
1836 | addrconf_verify(0); | |
1837 | } | |
1838 | } | |
1839 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1840 | in6_dev_put(in6_dev); | |
1841 | } | |
1842 | ||
1843 | /* | |
1844 | * Set destination address. | |
1845 | * Special case for SIT interfaces where we create a new "virtual" | |
1846 | * device. | |
1847 | */ | |
1848 | int addrconf_set_dstaddr(void __user *arg) | |
1849 | { | |
1850 | struct in6_ifreq ireq; | |
1851 | struct net_device *dev; | |
1852 | int err = -EINVAL; | |
1853 | ||
1854 | rtnl_lock(); | |
1855 | ||
1856 | err = -EFAULT; | |
1857 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1858 | goto err_exit; | |
1859 | ||
1860 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1861 | ||
1862 | err = -ENODEV; | |
1863 | if (dev == NULL) | |
1864 | goto err_exit; | |
1865 | ||
0be669bb | 1866 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1867 | if (dev->type == ARPHRD_SIT) { |
1868 | struct ifreq ifr; | |
1869 | mm_segment_t oldfs; | |
1870 | struct ip_tunnel_parm p; | |
1871 | ||
1872 | err = -EADDRNOTAVAIL; | |
1873 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1874 | goto err_exit; | |
1875 | ||
1876 | memset(&p, 0, sizeof(p)); | |
1877 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1878 | p.iph.saddr = 0; | |
1879 | p.iph.version = 4; | |
1880 | p.iph.ihl = 5; | |
1881 | p.iph.protocol = IPPROTO_IPV6; | |
1882 | p.iph.ttl = 64; | |
1883 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1884 | ||
1885 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1886 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1887 | set_fs(oldfs); | |
1888 | ||
1889 | if (err == 0) { | |
1890 | err = -ENOBUFS; | |
1891 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1892 | goto err_exit; | |
1893 | err = dev_open(dev); | |
1894 | } | |
1895 | } | |
0be669bb | 1896 | #endif |
1da177e4 LT |
1897 | |
1898 | err_exit: | |
1899 | rtnl_unlock(); | |
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * Manual configuration of address on an interface | |
1905 | */ | |
0778769d | 1906 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1907 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1908 | { |
1909 | struct inet6_ifaddr *ifp; | |
1910 | struct inet6_dev *idev; | |
1911 | struct net_device *dev; | |
1912 | int scope; | |
46d48046 | 1913 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1914 | |
1915 | ASSERT_RTNL(); | |
1ab1457c | 1916 | |
0778769d NT |
1917 | /* check the lifetime */ |
1918 | if (!valid_lft || prefered_lft > valid_lft) | |
1919 | return -EINVAL; | |
1920 | ||
1da177e4 LT |
1921 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1922 | return -ENODEV; | |
1ab1457c | 1923 | |
1da177e4 LT |
1924 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1925 | return -ENOBUFS; | |
1926 | ||
1927 | scope = ipv6_addr_scope(pfx); | |
1928 | ||
46d48046 | 1929 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1930 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1931 | flags = 0; |
1932 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1933 | valid_lft = 0x7FFFFFFF/HZ; |
1934 | ||
1935 | if (prefered_lft == 0) | |
1936 | ifa_flags |= IFA_F_DEPRECATED; | |
1937 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1938 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1939 | prefered_lft = 0x7FFFFFFF/HZ; | |
1940 | ||
1941 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1942 | ||
1da177e4 | 1943 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1944 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1945 | ifp->valid_lft = valid_lft; |
1946 | ifp->prefered_lft = prefered_lft; | |
1947 | ifp->tstamp = jiffies; | |
06aebfb7 | 1948 | spin_unlock_bh(&ifp->lock); |
0778769d | 1949 | |
46d48046 YH |
1950 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1951 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
1952 | /* |
1953 | * Note that section 3.1 of RFC 4429 indicates | |
1954 | * that the Optimistic flag should not be set for | |
1955 | * manually configured addresses | |
1956 | */ | |
1da177e4 LT |
1957 | addrconf_dad_start(ifp, 0); |
1958 | in6_ifa_put(ifp); | |
0778769d | 1959 | addrconf_verify(0); |
1da177e4 LT |
1960 | return 0; |
1961 | } | |
1962 | ||
1963 | return PTR_ERR(ifp); | |
1964 | } | |
1965 | ||
1966 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1967 | { | |
1968 | struct inet6_ifaddr *ifp; | |
1969 | struct inet6_dev *idev; | |
1970 | struct net_device *dev; | |
1ab1457c | 1971 | |
1da177e4 LT |
1972 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1973 | return -ENODEV; | |
1974 | ||
1975 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1976 | return -ENXIO; | |
1977 | ||
1978 | read_lock_bh(&idev->lock); | |
1979 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1980 | if (ifp->prefix_len == plen && | |
1981 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1982 | in6_ifa_hold(ifp); | |
1983 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1984 | |
1da177e4 LT |
1985 | ipv6_del_addr(ifp); |
1986 | ||
1987 | /* If the last address is deleted administratively, | |
1988 | disable IPv6 on this interface. | |
1989 | */ | |
1990 | if (idev->addr_list == NULL) | |
1991 | addrconf_ifdown(idev->dev, 1); | |
1992 | return 0; | |
1993 | } | |
1994 | } | |
1995 | read_unlock_bh(&idev->lock); | |
1996 | return -EADDRNOTAVAIL; | |
1997 | } | |
1998 | ||
1999 | ||
2000 | int addrconf_add_ifaddr(void __user *arg) | |
2001 | { | |
2002 | struct in6_ifreq ireq; | |
2003 | int err; | |
1ab1457c | 2004 | |
1da177e4 LT |
2005 | if (!capable(CAP_NET_ADMIN)) |
2006 | return -EPERM; | |
1ab1457c | 2007 | |
1da177e4 LT |
2008 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2009 | return -EFAULT; | |
2010 | ||
2011 | rtnl_lock(); | |
0778769d | 2012 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 2013 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
2014 | rtnl_unlock(); |
2015 | return err; | |
2016 | } | |
2017 | ||
2018 | int addrconf_del_ifaddr(void __user *arg) | |
2019 | { | |
2020 | struct in6_ifreq ireq; | |
2021 | int err; | |
1ab1457c | 2022 | |
1da177e4 LT |
2023 | if (!capable(CAP_NET_ADMIN)) |
2024 | return -EPERM; | |
2025 | ||
2026 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2027 | return -EFAULT; | |
2028 | ||
2029 | rtnl_lock(); | |
2030 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2031 | rtnl_unlock(); | |
2032 | return err; | |
2033 | } | |
2034 | ||
0be669bb | 2035 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2036 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2037 | { | |
2038 | struct inet6_ifaddr * ifp; | |
2039 | struct in6_addr addr; | |
2040 | struct net_device *dev; | |
2041 | int scope; | |
2042 | ||
2043 | ASSERT_RTNL(); | |
2044 | ||
2045 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2046 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2047 | ||
2048 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2049 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2050 | scope = IFA_LINK; | |
2051 | } else { | |
2052 | scope = IPV6_ADDR_COMPATv4; | |
2053 | } | |
2054 | ||
2055 | if (addr.s6_addr32[3]) { | |
2056 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2057 | if (!IS_ERR(ifp)) { | |
2058 | spin_lock_bh(&ifp->lock); | |
2059 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2060 | spin_unlock_bh(&ifp->lock); | |
2061 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2062 | in6_ifa_put(ifp); | |
2063 | } | |
2064 | return; | |
2065 | } | |
2066 | ||
7562f876 | 2067 | for_each_netdev(dev) { |
e5ed6399 | 2068 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2069 | if (in_dev && (dev->flags & IFF_UP)) { |
2070 | struct in_ifaddr * ifa; | |
2071 | ||
2072 | int flag = scope; | |
2073 | ||
2074 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2075 | int plen; | |
2076 | ||
2077 | addr.s6_addr32[3] = ifa->ifa_local; | |
2078 | ||
2079 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2080 | continue; | |
2081 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2082 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2083 | continue; | |
2084 | flag |= IFA_HOST; | |
2085 | } | |
2086 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2087 | plen = 64; | |
2088 | else | |
2089 | plen = 96; | |
2090 | ||
2091 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2092 | IFA_F_PERMANENT); | |
2093 | if (!IS_ERR(ifp)) { | |
2094 | spin_lock_bh(&ifp->lock); | |
2095 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2096 | spin_unlock_bh(&ifp->lock); | |
2097 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2098 | in6_ifa_put(ifp); | |
2099 | } | |
2100 | } | |
2101 | } | |
1ab1457c | 2102 | } |
1da177e4 | 2103 | } |
0be669bb | 2104 | #endif |
1da177e4 LT |
2105 | |
2106 | static void init_loopback(struct net_device *dev) | |
2107 | { | |
2108 | struct inet6_dev *idev; | |
2109 | struct inet6_ifaddr * ifp; | |
2110 | ||
2111 | /* ::1 */ | |
2112 | ||
2113 | ASSERT_RTNL(); | |
2114 | ||
2115 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2116 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2117 | return; | |
2118 | } | |
2119 | ||
2120 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2121 | if (!IS_ERR(ifp)) { | |
2122 | spin_lock_bh(&ifp->lock); | |
2123 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2124 | spin_unlock_bh(&ifp->lock); | |
2125 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2126 | in6_ifa_put(ifp); | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2131 | { | |
2132 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2133 | u32 addr_flags = IFA_F_PERMANENT; |
2134 | ||
2135 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2136 | if (idev->cnf.optimistic_dad && | |
2137 | !ipv6_devconf.forwarding) | |
2138 | addr_flags |= IFA_F_OPTIMISTIC; | |
2139 | #endif | |
1da177e4 | 2140 | |
95c385b4 NH |
2141 | |
2142 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2143 | if (!IS_ERR(ifp)) { |
46d48046 | 2144 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2145 | addrconf_dad_start(ifp, 0); |
2146 | in6_ifa_put(ifp); | |
2147 | } | |
2148 | } | |
2149 | ||
2150 | static void addrconf_dev_config(struct net_device *dev) | |
2151 | { | |
2152 | struct in6_addr addr; | |
2153 | struct inet6_dev * idev; | |
2154 | ||
2155 | ASSERT_RTNL(); | |
2156 | ||
74235a25 HX |
2157 | if ((dev->type != ARPHRD_ETHER) && |
2158 | (dev->type != ARPHRD_FDDI) && | |
2159 | (dev->type != ARPHRD_IEEE802_TR) && | |
2160 | (dev->type != ARPHRD_ARCNET) && | |
2161 | (dev->type != ARPHRD_INFINIBAND)) { | |
2162 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2163 | return; | |
2164 | } | |
2165 | ||
1da177e4 LT |
2166 | idev = addrconf_add_dev(dev); |
2167 | if (idev == NULL) | |
2168 | return; | |
2169 | ||
2170 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2171 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2172 | ||
2173 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2174 | addrconf_add_linklocal(idev, &addr); | |
2175 | } | |
2176 | ||
0be669bb | 2177 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2178 | static void addrconf_sit_config(struct net_device *dev) |
2179 | { | |
2180 | struct inet6_dev *idev; | |
2181 | ||
2182 | ASSERT_RTNL(); | |
2183 | ||
1ab1457c YH |
2184 | /* |
2185 | * Configure the tunnel with one of our IPv4 | |
2186 | * addresses... we should configure all of | |
1da177e4 LT |
2187 | * our v4 addrs in the tunnel |
2188 | */ | |
2189 | ||
2190 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2191 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2192 | return; | |
2193 | } | |
2194 | ||
2195 | sit_add_v4_addrs(idev); | |
2196 | ||
2197 | if (dev->flags&IFF_POINTOPOINT) { | |
2198 | addrconf_add_mroute(dev); | |
2199 | addrconf_add_lroute(dev); | |
2200 | } else | |
2201 | sit_route_add(dev); | |
2202 | } | |
0be669bb | 2203 | #endif |
1da177e4 LT |
2204 | |
2205 | static inline int | |
2206 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2207 | { | |
2208 | struct in6_addr lladdr; | |
2209 | ||
95c385b4 | 2210 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2211 | addrconf_add_linklocal(idev, &lladdr); |
2212 | return 0; | |
2213 | } | |
2214 | return -1; | |
2215 | } | |
2216 | ||
2217 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2218 | { | |
2219 | struct net_device *link_dev; | |
2220 | ||
2221 | /* first try to inherit the link-local address from the link device */ | |
2222 | if (idev->dev->iflink && | |
2223 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2224 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2225 | return; | |
2226 | } | |
2227 | /* then try to inherit it from any device */ | |
7562f876 | 2228 | for_each_netdev(link_dev) { |
1da177e4 LT |
2229 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2230 | return; | |
2231 | } | |
2232 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2233 | } | |
2234 | ||
2235 | /* | |
2236 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2237 | * DHCPv6, MLD etc. can be run over the virtual link | |
2238 | */ | |
2239 | ||
2240 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2241 | { | |
2242 | struct inet6_dev *idev; | |
2243 | ||
2244 | ASSERT_RTNL(); | |
2245 | ||
2246 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2247 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2248 | return; | |
2249 | } | |
2250 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2251 | } |
2252 | ||
1ab1457c | 2253 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2254 | void * data) |
2255 | { | |
2256 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2257 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2258 | int run_pending = 0; |
1da177e4 LT |
2259 | |
2260 | switch(event) { | |
45ba9dd2 | 2261 | case NETDEV_REGISTER: |
74235a25 | 2262 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2263 | idev = ipv6_add_dev(dev); |
2264 | if (!idev) | |
2265 | printk(KERN_WARNING "IPv6: add_dev failed for %s\n", | |
2266 | dev->name); | |
2267 | } | |
2268 | break; | |
1da177e4 | 2269 | case NETDEV_UP: |
3c21edbd | 2270 | case NETDEV_CHANGE: |
c2edacf8 JV |
2271 | if (dev->flags & IFF_SLAVE) |
2272 | break; | |
2273 | ||
3c21edbd YH |
2274 | if (event == NETDEV_UP) { |
2275 | if (!netif_carrier_ok(dev)) { | |
2276 | /* device is not ready yet. */ | |
2277 | printk(KERN_INFO | |
2278 | "ADDRCONF(NETDEV_UP): %s: " | |
2279 | "link is not ready\n", | |
2280 | dev->name); | |
2281 | break; | |
2282 | } | |
99081049 KS |
2283 | |
2284 | if (idev) | |
2285 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2286 | } else { |
2287 | if (!netif_carrier_ok(dev)) { | |
2288 | /* device is still not ready. */ | |
2289 | break; | |
2290 | } | |
2291 | ||
2292 | if (idev) { | |
2293 | if (idev->if_flags & IF_READY) { | |
2294 | /* device is already configured. */ | |
2295 | break; | |
2296 | } | |
2297 | idev->if_flags |= IF_READY; | |
2298 | } | |
2299 | ||
2300 | printk(KERN_INFO | |
2301 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2302 | "link becomes ready\n", | |
2303 | dev->name); | |
2304 | ||
c5e33bdd | 2305 | run_pending = 1; |
3c21edbd YH |
2306 | } |
2307 | ||
1da177e4 | 2308 | switch(dev->type) { |
0be669bb | 2309 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2310 | case ARPHRD_SIT: |
2311 | addrconf_sit_config(dev); | |
2312 | break; | |
0be669bb | 2313 | #endif |
1da177e4 LT |
2314 | case ARPHRD_TUNNEL6: |
2315 | addrconf_ip6_tnl_config(dev); | |
2316 | break; | |
2317 | case ARPHRD_LOOPBACK: | |
2318 | init_loopback(dev); | |
2319 | break; | |
2320 | ||
2321 | default: | |
2322 | addrconf_dev_config(dev); | |
2323 | break; | |
3ff50b79 | 2324 | } |
1da177e4 | 2325 | if (idev) { |
c5e33bdd YH |
2326 | if (run_pending) |
2327 | addrconf_dad_run(idev); | |
2328 | ||
1da177e4 LT |
2329 | /* If the MTU changed during the interface down, when the |
2330 | interface up, the changed MTU must be reflected in the | |
2331 | idev as well as routers. | |
2332 | */ | |
2333 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2334 | rt6_mtu_change(dev, dev->mtu); | |
2335 | idev->cnf.mtu6 = dev->mtu; | |
2336 | } | |
2337 | idev->tstamp = jiffies; | |
2338 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2339 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2340 | stop IPv6 on this interface. | |
2341 | */ | |
2342 | if (dev->mtu < IPV6_MIN_MTU) | |
2343 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2344 | } | |
2345 | break; | |
2346 | ||
2347 | case NETDEV_CHANGEMTU: | |
2348 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2349 | rt6_mtu_change(dev, dev->mtu); | |
2350 | idev->cnf.mtu6 = dev->mtu; | |
2351 | break; | |
2352 | } | |
2353 | ||
2354 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2355 | ||
2356 | case NETDEV_DOWN: | |
2357 | case NETDEV_UNREGISTER: | |
2358 | /* | |
2359 | * Remove all addresses from this interface. | |
2360 | */ | |
2361 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2362 | break; | |
3c21edbd | 2363 | |
1da177e4 | 2364 | case NETDEV_CHANGENAME: |
1da177e4 | 2365 | if (idev) { |
5632c515 SH |
2366 | snmp6_unregister_dev(idev); |
2367 | #ifdef CONFIG_SYSCTL | |
1da177e4 LT |
2368 | addrconf_sysctl_unregister(&idev->cnf); |
2369 | neigh_sysctl_unregister(idev->nd_parms); | |
2370 | neigh_sysctl_register(dev, idev->nd_parms, | |
2371 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2372 | &ndisc_ifinfo_sysctl_change, | |
2373 | NULL); | |
2374 | addrconf_sysctl_register(idev, &idev->cnf); | |
1da177e4 | 2375 | #endif |
5632c515 SH |
2376 | snmp6_register_dev(idev); |
2377 | } | |
1da177e4 | 2378 | break; |
3ff50b79 | 2379 | } |
1da177e4 LT |
2380 | |
2381 | return NOTIFY_OK; | |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * addrconf module should be notified of a device going up | |
2386 | */ | |
2387 | static struct notifier_block ipv6_dev_notf = { | |
2388 | .notifier_call = addrconf_notify, | |
2389 | .priority = 0 | |
2390 | }; | |
2391 | ||
2392 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2393 | { | |
2394 | struct inet6_dev *idev; | |
2395 | struct inet6_ifaddr *ifa, **bifa; | |
2396 | int i; | |
2397 | ||
2398 | ASSERT_RTNL(); | |
2399 | ||
2400 | if (dev == &loopback_dev && how == 1) | |
2401 | how = 0; | |
2402 | ||
2403 | rt6_ifdown(dev); | |
2404 | neigh_ifdown(&nd_tbl, dev); | |
2405 | ||
2406 | idev = __in6_dev_get(dev); | |
2407 | if (idev == NULL) | |
2408 | return -ENODEV; | |
2409 | ||
2410 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2411 | Do not dev_put! |
1da177e4 LT |
2412 | */ |
2413 | if (how == 1) { | |
1da177e4 | 2414 | idev->dead = 1; |
8814c4b5 YH |
2415 | |
2416 | /* protected by rtnl_lock */ | |
2417 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2418 | |
2419 | /* Step 1.5: remove snmp6 entry */ | |
2420 | snmp6_unregister_dev(idev); | |
2421 | ||
2422 | } | |
2423 | ||
2424 | /* Step 2: clear hash table */ | |
2425 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2426 | bifa = &inet6_addr_lst[i]; | |
2427 | ||
2428 | write_lock_bh(&addrconf_hash_lock); | |
2429 | while ((ifa = *bifa) != NULL) { | |
2430 | if (ifa->idev == idev) { | |
2431 | *bifa = ifa->lst_next; | |
2432 | ifa->lst_next = NULL; | |
2433 | addrconf_del_timer(ifa); | |
2434 | in6_ifa_put(ifa); | |
2435 | continue; | |
2436 | } | |
2437 | bifa = &ifa->lst_next; | |
2438 | } | |
2439 | write_unlock_bh(&addrconf_hash_lock); | |
2440 | } | |
2441 | ||
2442 | write_lock_bh(&idev->lock); | |
2443 | ||
2444 | /* Step 3: clear flags for stateless addrconf */ | |
2445 | if (how != 1) | |
3c21edbd | 2446 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2447 | |
2448 | /* Step 4: clear address list */ | |
2449 | #ifdef CONFIG_IPV6_PRIVACY | |
2450 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2451 | in6_dev_put(idev); | |
2452 | ||
2453 | /* clear tempaddr list */ | |
2454 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2455 | idev->tempaddr_list = ifa->tmp_next; | |
2456 | ifa->tmp_next = NULL; | |
2457 | ifa->dead = 1; | |
2458 | write_unlock_bh(&idev->lock); | |
2459 | spin_lock_bh(&ifa->lock); | |
2460 | ||
2461 | if (ifa->ifpub) { | |
2462 | in6_ifa_put(ifa->ifpub); | |
2463 | ifa->ifpub = NULL; | |
2464 | } | |
2465 | spin_unlock_bh(&ifa->lock); | |
2466 | in6_ifa_put(ifa); | |
2467 | write_lock_bh(&idev->lock); | |
2468 | } | |
2469 | #endif | |
2470 | while ((ifa = idev->addr_list) != NULL) { | |
2471 | idev->addr_list = ifa->if_next; | |
2472 | ifa->if_next = NULL; | |
2473 | ifa->dead = 1; | |
2474 | addrconf_del_timer(ifa); | |
2475 | write_unlock_bh(&idev->lock); | |
2476 | ||
2477 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2478 | in6_ifa_put(ifa); | |
2479 | ||
2480 | write_lock_bh(&idev->lock); | |
2481 | } | |
2482 | write_unlock_bh(&idev->lock); | |
2483 | ||
2484 | /* Step 5: Discard multicast list */ | |
2485 | ||
2486 | if (how == 1) | |
2487 | ipv6_mc_destroy_dev(idev); | |
2488 | else | |
2489 | ipv6_mc_down(idev); | |
2490 | ||
2491 | /* Step 5: netlink notification of this interface */ | |
2492 | idev->tstamp = jiffies; | |
979ad663 | 2493 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2494 | |
1da177e4 LT |
2495 | /* Shot the device (if unregistered) */ |
2496 | ||
2497 | if (how == 1) { | |
2498 | #ifdef CONFIG_SYSCTL | |
2499 | addrconf_sysctl_unregister(&idev->cnf); | |
2500 | neigh_sysctl_unregister(idev->nd_parms); | |
2501 | #endif | |
2502 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2503 | neigh_ifdown(&nd_tbl, dev); | |
2504 | in6_dev_put(idev); | |
2505 | } | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | static void addrconf_rs_timer(unsigned long data) | |
2510 | { | |
2511 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2512 | ||
2513 | if (ifp->idev->cnf.forwarding) | |
2514 | goto out; | |
2515 | ||
2516 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2517 | /* | |
2518 | * Announcement received after solicitation | |
2519 | * was sent | |
2520 | */ | |
2521 | goto out; | |
2522 | } | |
2523 | ||
2524 | spin_lock(&ifp->lock); | |
2525 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2526 | struct in6_addr all_routers; | |
2527 | ||
2528 | /* The wait after the last probe can be shorter */ | |
2529 | addrconf_mod_timer(ifp, AC_RS, | |
2530 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2531 | ifp->idev->cnf.rtr_solicit_delay : | |
2532 | ifp->idev->cnf.rtr_solicit_interval); | |
2533 | spin_unlock(&ifp->lock); | |
2534 | ||
2535 | ipv6_addr_all_routers(&all_routers); | |
2536 | ||
2537 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2538 | } else { | |
2539 | spin_unlock(&ifp->lock); | |
2540 | /* | |
2541 | * Note: we do not support deprecated "all on-link" | |
2542 | * assumption any longer. | |
2543 | */ | |
2544 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2545 | ifp->idev->dev->name); | |
2546 | } | |
2547 | ||
2548 | out: | |
2549 | in6_ifa_put(ifp); | |
2550 | } | |
2551 | ||
2552 | /* | |
2553 | * Duplicate Address Detection | |
2554 | */ | |
3c21edbd YH |
2555 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2556 | { | |
2557 | unsigned long rand_num; | |
2558 | struct inet6_dev *idev = ifp->idev; | |
2559 | ||
95c385b4 NH |
2560 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2561 | rand_num = 0; | |
2562 | else | |
2563 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2564 | ||
3c21edbd YH |
2565 | ifp->probes = idev->cnf.dad_transmits; |
2566 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2567 | } | |
2568 | ||
e431b8c0 | 2569 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2570 | { |
2571 | struct inet6_dev *idev = ifp->idev; | |
2572 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2573 | |
2574 | addrconf_join_solict(dev, &ifp->addr); | |
2575 | ||
1da177e4 | 2576 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2577 | |
2578 | read_lock_bh(&idev->lock); | |
2579 | if (ifp->dead) | |
2580 | goto out; | |
2581 | spin_lock_bh(&ifp->lock); | |
2582 | ||
2583 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2584 | !(ifp->flags&IFA_F_TENTATIVE) || |
2585 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2586 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2587 | spin_unlock_bh(&ifp->lock); |
2588 | read_unlock_bh(&idev->lock); | |
2589 | ||
2590 | addrconf_dad_completed(ifp); | |
2591 | return; | |
2592 | } | |
2593 | ||
6732bade | 2594 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2595 | spin_unlock_bh(&ifp->lock); |
6732bade | 2596 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2597 | /* |
2598 | * If the defice is not ready: | |
2599 | * - keep it tentative if it is a permanent address. | |
2600 | * - otherwise, kill it. | |
2601 | */ | |
2602 | in6_ifa_hold(ifp); | |
2603 | addrconf_dad_stop(ifp); | |
6732bade | 2604 | return; |
3c21edbd | 2605 | } |
95c385b4 NH |
2606 | |
2607 | /* | |
2608 | * Optimistic nodes can start receiving | |
2609 | * Frames right away | |
2610 | */ | |
2611 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2612 | ip6_ins_rt(ifp->rt); | |
2613 | ||
6732bade YH |
2614 | addrconf_dad_kick(ifp); |
2615 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2616 | out: |
2617 | read_unlock_bh(&idev->lock); | |
2618 | } | |
2619 | ||
2620 | static void addrconf_dad_timer(unsigned long data) | |
2621 | { | |
2622 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2623 | struct inet6_dev *idev = ifp->idev; | |
2624 | struct in6_addr unspec; | |
2625 | struct in6_addr mcaddr; | |
2626 | ||
2627 | read_lock_bh(&idev->lock); | |
2628 | if (idev->dead) { | |
2629 | read_unlock_bh(&idev->lock); | |
2630 | goto out; | |
2631 | } | |
2632 | spin_lock_bh(&ifp->lock); | |
2633 | if (ifp->probes == 0) { | |
2634 | /* | |
2635 | * DAD was successful | |
2636 | */ | |
2637 | ||
95c385b4 | 2638 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2639 | spin_unlock_bh(&ifp->lock); |
2640 | read_unlock_bh(&idev->lock); | |
2641 | ||
2642 | addrconf_dad_completed(ifp); | |
2643 | ||
2644 | goto out; | |
2645 | } | |
2646 | ||
2647 | ifp->probes--; | |
2648 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2649 | spin_unlock_bh(&ifp->lock); | |
2650 | read_unlock_bh(&idev->lock); | |
2651 | ||
2652 | /* send a neighbour solicitation for our addr */ | |
2653 | memset(&unspec, 0, sizeof(unspec)); | |
2654 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2655 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2656 | out: | |
2657 | in6_ifa_put(ifp); | |
2658 | } | |
2659 | ||
2660 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2661 | { | |
2662 | struct net_device * dev = ifp->idev->dev; | |
2663 | ||
2664 | /* | |
2665 | * Configure the address for reception. Now it is valid. | |
2666 | */ | |
2667 | ||
2668 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2669 | ||
2670 | /* If added prefix is link local and forwarding is off, | |
2671 | start sending router solicitations. | |
2672 | */ | |
2673 | ||
2674 | if (ifp->idev->cnf.forwarding == 0 && | |
2675 | ifp->idev->cnf.rtr_solicits > 0 && | |
2676 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2677 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2678 | struct in6_addr all_routers; | |
2679 | ||
2680 | ipv6_addr_all_routers(&all_routers); | |
2681 | ||
2682 | /* | |
2683 | * If a host as already performed a random delay | |
2684 | * [...] as part of DAD [...] there is no need | |
2685 | * to delay again before sending the first RS | |
2686 | */ | |
2687 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2688 | ||
2689 | spin_lock_bh(&ifp->lock); | |
2690 | ifp->probes = 1; | |
2691 | ifp->idev->if_flags |= IF_RS_SENT; | |
2692 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2693 | spin_unlock_bh(&ifp->lock); | |
2694 | } | |
2695 | } | |
2696 | ||
c5e33bdd YH |
2697 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2698 | struct inet6_ifaddr *ifp; | |
2699 | ||
2700 | read_lock_bh(&idev->lock); | |
2701 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2702 | spin_lock_bh(&ifp->lock); | |
2703 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2704 | spin_unlock_bh(&ifp->lock); | |
2705 | continue; | |
2706 | } | |
2707 | spin_unlock_bh(&ifp->lock); | |
2708 | addrconf_dad_kick(ifp); | |
2709 | } | |
2710 | read_unlock_bh(&idev->lock); | |
2711 | } | |
2712 | ||
1da177e4 LT |
2713 | #ifdef CONFIG_PROC_FS |
2714 | struct if6_iter_state { | |
2715 | int bucket; | |
2716 | }; | |
2717 | ||
2718 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2719 | { | |
2720 | struct inet6_ifaddr *ifa = NULL; | |
2721 | struct if6_iter_state *state = seq->private; | |
2722 | ||
2723 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2724 | ifa = inet6_addr_lst[state->bucket]; | |
2725 | if (ifa) | |
2726 | break; | |
2727 | } | |
2728 | return ifa; | |
2729 | } | |
2730 | ||
2731 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2732 | { | |
2733 | struct if6_iter_state *state = seq->private; | |
2734 | ||
2735 | ifa = ifa->lst_next; | |
2736 | try_again: | |
2737 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2738 | ifa = inet6_addr_lst[state->bucket]; | |
2739 | goto try_again; | |
2740 | } | |
2741 | return ifa; | |
2742 | } | |
2743 | ||
2744 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2745 | { | |
2746 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2747 | ||
2748 | if (ifa) | |
2749 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2750 | --pos; | |
2751 | return pos ? NULL : ifa; | |
2752 | } | |
2753 | ||
2754 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2755 | { | |
2756 | read_lock_bh(&addrconf_hash_lock); | |
2757 | return if6_get_idx(seq, *pos); | |
2758 | } | |
2759 | ||
2760 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2761 | { | |
2762 | struct inet6_ifaddr *ifa; | |
2763 | ||
2764 | ifa = if6_get_next(seq, v); | |
2765 | ++*pos; | |
2766 | return ifa; | |
2767 | } | |
2768 | ||
2769 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2770 | { | |
2771 | read_unlock_bh(&addrconf_hash_lock); | |
2772 | } | |
2773 | ||
2774 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2775 | { | |
2776 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2777 | seq_printf(seq, | |
9343e79a | 2778 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2779 | NIP6(ifp->addr), |
2780 | ifp->idev->dev->ifindex, | |
2781 | ifp->prefix_len, | |
2782 | ifp->scope, | |
2783 | ifp->flags, | |
2784 | ifp->idev->dev->name); | |
2785 | return 0; | |
2786 | } | |
2787 | ||
56b3d975 | 2788 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2789 | .start = if6_seq_start, |
2790 | .next = if6_seq_next, | |
2791 | .show = if6_seq_show, | |
2792 | .stop = if6_seq_stop, | |
2793 | }; | |
2794 | ||
2795 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2796 | { | |
2797 | struct seq_file *seq; | |
2798 | int rc = -ENOMEM; | |
322f74a4 | 2799 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2800 | |
2801 | if (!s) | |
2802 | goto out; | |
1da177e4 LT |
2803 | |
2804 | rc = seq_open(file, &if6_seq_ops); | |
2805 | if (rc) | |
2806 | goto out_kfree; | |
2807 | ||
2808 | seq = file->private_data; | |
2809 | seq->private = s; | |
2810 | out: | |
2811 | return rc; | |
2812 | out_kfree: | |
2813 | kfree(s); | |
2814 | goto out; | |
2815 | } | |
2816 | ||
9a32144e | 2817 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2818 | .owner = THIS_MODULE, |
2819 | .open = if6_seq_open, | |
2820 | .read = seq_read, | |
2821 | .llseek = seq_lseek, | |
2822 | .release = seq_release_private, | |
2823 | }; | |
2824 | ||
2825 | int __init if6_proc_init(void) | |
2826 | { | |
2827 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2828 | return -ENOMEM; | |
2829 | return 0; | |
2830 | } | |
2831 | ||
2832 | void if6_proc_exit(void) | |
2833 | { | |
2834 | proc_net_remove("if_inet6"); | |
2835 | } | |
2836 | #endif /* CONFIG_PROC_FS */ | |
2837 | ||
59fbb3a6 | 2838 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
2839 | /* Check if address is a home address configured on any interface. */ |
2840 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2841 | { | |
2842 | int ret = 0; | |
2843 | struct inet6_ifaddr * ifp; | |
2844 | u8 hash = ipv6_addr_hash(addr); | |
2845 | read_lock_bh(&addrconf_hash_lock); | |
2846 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2847 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2848 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2849 | ret = 1; | |
2850 | break; | |
2851 | } | |
2852 | } | |
2853 | read_unlock_bh(&addrconf_hash_lock); | |
2854 | return ret; | |
2855 | } | |
2856 | #endif | |
2857 | ||
1da177e4 LT |
2858 | /* |
2859 | * Periodic address status verification | |
2860 | */ | |
2861 | ||
2862 | static void addrconf_verify(unsigned long foo) | |
2863 | { | |
2864 | struct inet6_ifaddr *ifp; | |
2865 | unsigned long now, next; | |
2866 | int i; | |
2867 | ||
2868 | spin_lock_bh(&addrconf_verify_lock); | |
2869 | now = jiffies; | |
2870 | next = now + ADDR_CHECK_FREQUENCY; | |
2871 | ||
2872 | del_timer(&addr_chk_timer); | |
2873 | ||
2874 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2875 | ||
2876 | restart: | |
5d5780df | 2877 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2878 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2879 | unsigned long age; | |
2880 | #ifdef CONFIG_IPV6_PRIVACY | |
2881 | unsigned long regen_advance; | |
2882 | #endif | |
2883 | ||
2884 | if (ifp->flags & IFA_F_PERMANENT) | |
2885 | continue; | |
2886 | ||
2887 | spin_lock(&ifp->lock); | |
2888 | age = (now - ifp->tstamp) / HZ; | |
2889 | ||
2890 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2891 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2892 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2893 | ifp->idev->nd_parms->retrans_time / HZ; |
2894 | #endif | |
2895 | ||
8f27ebb9 YH |
2896 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2897 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2898 | spin_unlock(&ifp->lock); |
2899 | in6_ifa_hold(ifp); | |
5d5780df | 2900 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2901 | ipv6_del_addr(ifp); |
2902 | goto restart; | |
8f27ebb9 YH |
2903 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2904 | spin_unlock(&ifp->lock); | |
2905 | continue; | |
1da177e4 LT |
2906 | } else if (age >= ifp->prefered_lft) { |
2907 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2908 | int deprecate = 0; | |
2909 | ||
2910 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2911 | deprecate = 1; | |
2912 | ifp->flags |= IFA_F_DEPRECATED; | |
2913 | } | |
2914 | ||
2915 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2916 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2917 | ||
2918 | spin_unlock(&ifp->lock); | |
2919 | ||
2920 | if (deprecate) { | |
2921 | in6_ifa_hold(ifp); | |
5d5780df | 2922 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2923 | |
2924 | ipv6_ifa_notify(0, ifp); | |
2925 | in6_ifa_put(ifp); | |
2926 | goto restart; | |
2927 | } | |
2928 | #ifdef CONFIG_IPV6_PRIVACY | |
2929 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2930 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2931 | if (age >= ifp->prefered_lft - regen_advance) { | |
2932 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2933 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2934 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2935 | if (!ifp->regen_count && ifpub) { | |
2936 | ifp->regen_count++; | |
2937 | in6_ifa_hold(ifp); | |
2938 | in6_ifa_hold(ifpub); | |
2939 | spin_unlock(&ifp->lock); | |
5d5780df | 2940 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2941 | spin_lock(&ifpub->lock); |
2942 | ifpub->regen_count = 0; | |
2943 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2944 | ipv6_create_tempaddr(ifpub, ifp); |
2945 | in6_ifa_put(ifpub); | |
2946 | in6_ifa_put(ifp); | |
2947 | goto restart; | |
2948 | } | |
2949 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2950 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2951 | spin_unlock(&ifp->lock); | |
2952 | #endif | |
2953 | } else { | |
2954 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2955 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2956 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2957 | spin_unlock(&ifp->lock); | |
2958 | } | |
2959 | } | |
5d5780df | 2960 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2961 | } |
2962 | ||
2963 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2964 | add_timer(&addr_chk_timer); | |
2965 | spin_unlock_bh(&addrconf_verify_lock); | |
2966 | } | |
2967 | ||
461d8837 TG |
2968 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2969 | { | |
2970 | struct in6_addr *pfx = NULL; | |
2971 | ||
2972 | if (addr) | |
2973 | pfx = nla_data(addr); | |
2974 | ||
2975 | if (local) { | |
2976 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2977 | pfx = NULL; | |
2978 | else | |
2979 | pfx = nla_data(local); | |
2980 | } | |
2981 | ||
2982 | return pfx; | |
2983 | } | |
2984 | ||
ef7c79ed | 2985 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
2986 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
2987 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2988 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2989 | }; | |
2990 | ||
1da177e4 LT |
2991 | static int |
2992 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2993 | { | |
b933f716 TG |
2994 | struct ifaddrmsg *ifm; |
2995 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2996 | struct in6_addr *pfx; |
b933f716 | 2997 | int err; |
1da177e4 | 2998 | |
b933f716 TG |
2999 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3000 | if (err < 0) | |
3001 | return err; | |
3002 | ||
3003 | ifm = nlmsg_data(nlh); | |
3004 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3005 | if (pfx == NULL) |
3006 | return -EINVAL; | |
3007 | ||
3008 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
3009 | } | |
3010 | ||
55ebaef1 NT |
3011 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3012 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3013 | { |
46d48046 YH |
3014 | u32 flags = RTF_EXPIRES; |
3015 | ||
081bba5b NT |
3016 | if (!valid_lft || (prefered_lft > valid_lft)) |
3017 | return -EINVAL; | |
3018 | ||
46d48046 | 3019 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 3020 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
3021 | flags = 0; |
3022 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
3023 | valid_lft = 0x7FFFFFFF/HZ; |
3024 | ||
3025 | if (prefered_lft == 0) | |
55ebaef1 | 3026 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
3027 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
3028 | (prefered_lft != INFINITY_LIFE_TIME)) | |
3029 | prefered_lft = 0x7FFFFFFF/HZ; | |
3030 | ||
3031 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3032 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3033 | ifp->tstamp = jiffies; |
3034 | ifp->valid_lft = valid_lft; | |
3035 | ifp->prefered_lft = prefered_lft; | |
3036 | ||
3037 | spin_unlock_bh(&ifp->lock); | |
3038 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3039 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3040 | |
46d48046 YH |
3041 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3042 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3043 | addrconf_verify(0); |
3044 | ||
3045 | return 0; | |
3046 | } | |
3047 | ||
1da177e4 LT |
3048 | static int |
3049 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3050 | { | |
461d8837 TG |
3051 | struct ifaddrmsg *ifm; |
3052 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3053 | struct in6_addr *pfx; |
7198f8ce TG |
3054 | struct inet6_ifaddr *ifa; |
3055 | struct net_device *dev; | |
55ebaef1 NT |
3056 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3057 | u8 ifa_flags; | |
461d8837 | 3058 | int err; |
1da177e4 | 3059 | |
461d8837 TG |
3060 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3061 | if (err < 0) | |
3062 | return err; | |
3063 | ||
3064 | ifm = nlmsg_data(nlh); | |
3065 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3066 | if (pfx == NULL) |
3067 | return -EINVAL; | |
3068 | ||
461d8837 | 3069 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3070 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3071 | |
3072 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3073 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3074 | preferred_lft = ci->ifa_prefered; |
3075 | } else { | |
3076 | preferred_lft = INFINITY_LIFE_TIME; | |
3077 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3078 | } |
3079 | ||
7198f8ce TG |
3080 | dev = __dev_get_by_index(ifm->ifa_index); |
3081 | if (dev == NULL) | |
3082 | return -ENODEV; | |
3083 | ||
55ebaef1 | 3084 | /* We ignore other flags so far. */ |
3b9f9a1c | 3085 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3086 | |
7198f8ce TG |
3087 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3088 | if (ifa == NULL) { | |
3089 | /* | |
3090 | * It would be best to check for !NLM_F_CREATE here but | |
3091 | * userspace alreay relies on not having to provide this. | |
3092 | */ | |
3093 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3094 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3095 | } |
3096 | ||
7198f8ce TG |
3097 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3098 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3099 | err = -EEXIST; | |
3100 | else | |
55ebaef1 | 3101 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3102 | |
3103 | in6_ifa_put(ifa); | |
3104 | ||
3105 | return err; | |
1da177e4 LT |
3106 | } |
3107 | ||
101bb229 TG |
3108 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3109 | u8 scope, int ifindex) | |
3110 | { | |
3111 | struct ifaddrmsg *ifm; | |
3112 | ||
3113 | ifm = nlmsg_data(nlh); | |
3114 | ifm->ifa_family = AF_INET6; | |
3115 | ifm->ifa_prefixlen = prefixlen; | |
3116 | ifm->ifa_flags = flags; | |
3117 | ifm->ifa_scope = scope; | |
3118 | ifm->ifa_index = ifindex; | |
3119 | } | |
3120 | ||
85486af0 TG |
3121 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3122 | unsigned long tstamp, u32 preferred, u32 valid) | |
3123 | { | |
3124 | struct ifa_cacheinfo ci; | |
3125 | ||
3126 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3127 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3128 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3129 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3130 | ci.ifa_prefered = preferred; | |
3131 | ci.ifa_valid = valid; | |
3132 | ||
3133 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3134 | } | |
3135 | ||
101bb229 TG |
3136 | static inline int rt_scope(int ifa_scope) |
3137 | { | |
3138 | if (ifa_scope & IFA_HOST) | |
3139 | return RT_SCOPE_HOST; | |
3140 | else if (ifa_scope & IFA_LINK) | |
3141 | return RT_SCOPE_LINK; | |
3142 | else if (ifa_scope & IFA_SITE) | |
3143 | return RT_SCOPE_SITE; | |
3144 | else | |
3145 | return RT_SCOPE_UNIVERSE; | |
3146 | } | |
3147 | ||
0ab6803b TG |
3148 | static inline int inet6_ifaddr_msgsize(void) |
3149 | { | |
339bf98f TG |
3150 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3151 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3152 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3153 | } |
c5396a31 | 3154 | |
1da177e4 | 3155 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3156 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3157 | { |
1da177e4 | 3158 | struct nlmsghdr *nlh; |
85486af0 | 3159 | u32 preferred, valid; |
1da177e4 | 3160 | |
0ab6803b TG |
3161 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3162 | if (nlh == NULL) | |
26932566 | 3163 | return -EMSGSIZE; |
0ab6803b | 3164 | |
101bb229 TG |
3165 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3166 | ifa->idev->dev->ifindex); | |
3167 | ||
1da177e4 | 3168 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3169 | preferred = ifa->prefered_lft; |
3170 | valid = ifa->valid_lft; | |
3171 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3172 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3173 | preferred -= tval; |
3174 | if (valid != INFINITY_LIFE_TIME) | |
3175 | valid -= tval; | |
1da177e4 LT |
3176 | } |
3177 | } else { | |
85486af0 TG |
3178 | preferred = INFINITY_LIFE_TIME; |
3179 | valid = INFINITY_LIFE_TIME; | |
3180 | } | |
3181 | ||
0ab6803b | 3182 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3183 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3184 | nlmsg_cancel(skb, nlh); | |
3185 | return -EMSGSIZE; | |
3186 | } | |
1da177e4 | 3187 | |
0ab6803b | 3188 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3189 | } |
3190 | ||
3191 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3192 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3193 | { |
1da177e4 | 3194 | struct nlmsghdr *nlh; |
101bb229 TG |
3195 | u8 scope = RT_SCOPE_UNIVERSE; |
3196 | int ifindex = ifmca->idev->dev->ifindex; | |
3197 | ||
3198 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3199 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3200 | |
0ab6803b TG |
3201 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3202 | if (nlh == NULL) | |
26932566 | 3203 | return -EMSGSIZE; |
85486af0 | 3204 | |
0ab6803b TG |
3205 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3206 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3207 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3208 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3209 | nlmsg_cancel(skb, nlh); | |
3210 | return -EMSGSIZE; | |
3211 | } | |
85486af0 | 3212 | |
0ab6803b | 3213 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3214 | } |
3215 | ||
3216 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3217 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3218 | { |
1da177e4 | 3219 | struct nlmsghdr *nlh; |
101bb229 TG |
3220 | u8 scope = RT_SCOPE_UNIVERSE; |
3221 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3222 | ||
3223 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3224 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3225 | |
0ab6803b TG |
3226 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3227 | if (nlh == NULL) | |
26932566 | 3228 | return -EMSGSIZE; |
85486af0 | 3229 | |
0ab6803b TG |
3230 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3231 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3232 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3233 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3234 | nlmsg_cancel(skb, nlh); | |
3235 | return -EMSGSIZE; | |
3236 | } | |
1da177e4 | 3237 | |
0ab6803b | 3238 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3239 | } |
3240 | ||
3241 | enum addr_type_t | |
3242 | { | |
3243 | UNICAST_ADDR, | |
3244 | MULTICAST_ADDR, | |
3245 | ANYCAST_ADDR, | |
3246 | }; | |
3247 | ||
3248 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3249 | enum addr_type_t type) | |
3250 | { | |
3251 | int idx, ip_idx; | |
3252 | int s_idx, s_ip_idx; | |
3253 | int err = 1; | |
3254 | struct net_device *dev; | |
3255 | struct inet6_dev *idev = NULL; | |
3256 | struct inet6_ifaddr *ifa; | |
3257 | struct ifmcaddr6 *ifmca; | |
3258 | struct ifacaddr6 *ifaca; | |
3259 | ||
3260 | s_idx = cb->args[0]; | |
3261 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3262 | |
7562f876 PE |
3263 | idx = 0; |
3264 | for_each_netdev(dev) { | |
1da177e4 | 3265 | if (idx < s_idx) |
7562f876 | 3266 | goto cont; |
1da177e4 LT |
3267 | if (idx > s_idx) |
3268 | s_ip_idx = 0; | |
3269 | ip_idx = 0; | |
3270 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3271 | goto cont; |
1da177e4 LT |
3272 | read_lock_bh(&idev->lock); |
3273 | switch (type) { | |
3274 | case UNICAST_ADDR: | |
ae9cda5d | 3275 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3276 | for (ifa = idev->addr_list; ifa; |
3277 | ifa = ifa->if_next, ip_idx++) { | |
3278 | if (ip_idx < s_ip_idx) | |
3279 | continue; | |
1ab1457c YH |
3280 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3281 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3282 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3283 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3284 | goto done; |
3285 | } | |
1da177e4 LT |
3286 | break; |
3287 | case MULTICAST_ADDR: | |
3288 | /* multicast address */ | |
1ab1457c | 3289 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3290 | ifmca = ifmca->next, ip_idx++) { |
3291 | if (ip_idx < s_ip_idx) | |
3292 | continue; | |
1ab1457c YH |
3293 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3294 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3295 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3296 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3297 | goto done; |
3298 | } | |
3299 | break; | |
3300 | case ANYCAST_ADDR: | |
3301 | /* anycast address */ | |
3302 | for (ifaca = idev->ac_list; ifaca; | |
3303 | ifaca = ifaca->aca_next, ip_idx++) { | |
3304 | if (ip_idx < s_ip_idx) | |
3305 | continue; | |
1ab1457c YH |
3306 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3307 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3308 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3309 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3310 | goto done; |
3311 | } | |
3312 | break; | |
3313 | default: | |
3314 | break; | |
3315 | } | |
3316 | read_unlock_bh(&idev->lock); | |
3317 | in6_dev_put(idev); | |
7562f876 PE |
3318 | cont: |
3319 | idx++; | |
1da177e4 LT |
3320 | } |
3321 | done: | |
3322 | if (err <= 0) { | |
3323 | read_unlock_bh(&idev->lock); | |
3324 | in6_dev_put(idev); | |
3325 | } | |
1da177e4 LT |
3326 | cb->args[0] = idx; |
3327 | cb->args[1] = ip_idx; | |
3328 | return skb->len; | |
3329 | } | |
3330 | ||
3331 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3332 | { | |
3333 | enum addr_type_t type = UNICAST_ADDR; | |
3334 | return inet6_dump_addr(skb, cb, type); | |
3335 | } | |
3336 | ||
3337 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3338 | { | |
3339 | enum addr_type_t type = MULTICAST_ADDR; | |
3340 | return inet6_dump_addr(skb, cb, type); | |
3341 | } | |
3342 | ||
3343 | ||
3344 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3345 | { | |
3346 | enum addr_type_t type = ANYCAST_ADDR; | |
3347 | return inet6_dump_addr(skb, cb, type); | |
3348 | } | |
3349 | ||
1b29fc2c TG |
3350 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3351 | void *arg) | |
6c223828 | 3352 | { |
1b29fc2c TG |
3353 | struct ifaddrmsg *ifm; |
3354 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3355 | struct in6_addr *addr = NULL; |
3356 | struct net_device *dev = NULL; | |
3357 | struct inet6_ifaddr *ifa; | |
3358 | struct sk_buff *skb; | |
6c223828 NT |
3359 | int err; |
3360 | ||
1b29fc2c TG |
3361 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3362 | if (err < 0) | |
3363 | goto errout; | |
3364 | ||
3365 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3366 | if (addr == NULL) { | |
3367 | err = -EINVAL; | |
3368 | goto errout; | |
6c223828 | 3369 | } |
6c223828 | 3370 | |
1b29fc2c | 3371 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3372 | if (ifm->ifa_index) |
3373 | dev = __dev_get_by_index(ifm->ifa_index); | |
3374 | ||
1b29fc2c TG |
3375 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3376 | err = -EADDRNOTAVAIL; | |
3377 | goto errout; | |
3378 | } | |
6c223828 | 3379 | |
0ab6803b | 3380 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3381 | err = -ENOBUFS; |
1b29fc2c | 3382 | goto errout_ifa; |
6c223828 NT |
3383 | } |
3384 | ||
6c223828 NT |
3385 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3386 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3387 | if (err < 0) { |
3388 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3389 | WARN_ON(err == -EMSGSIZE); | |
3390 | kfree_skb(skb); | |
3391 | goto errout_ifa; | |
3392 | } | |
2942e900 | 3393 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3394 | errout_ifa: |
6c223828 | 3395 | in6_ifa_put(ifa); |
1b29fc2c | 3396 | errout: |
6c223828 | 3397 | return err; |
6c223828 NT |
3398 | } |
3399 | ||
1da177e4 LT |
3400 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3401 | { | |
3402 | struct sk_buff *skb; | |
5d620266 | 3403 | int err = -ENOBUFS; |
1da177e4 | 3404 | |
0ab6803b | 3405 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3406 | if (skb == NULL) |
3407 | goto errout; | |
3408 | ||
3409 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3410 | if (err < 0) { |
3411 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3412 | WARN_ON(err == -EMSGSIZE); | |
3413 | kfree_skb(skb); | |
3414 | goto errout; | |
3415 | } | |
5d620266 TG |
3416 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3417 | errout: | |
3418 | if (err < 0) | |
3419 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3420 | } |
3421 | ||
b6f99a21 | 3422 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3423 | __s32 *array, int bytes) |
3424 | { | |
04561c1f TG |
3425 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3426 | ||
1da177e4 LT |
3427 | memset(array, 0, bytes); |
3428 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3429 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3430 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3431 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3432 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3433 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3434 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3435 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3436 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3437 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3438 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3439 | #ifdef CONFIG_IPV6_PRIVACY | |
3440 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3441 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3442 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3443 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3444 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3445 | #endif | |
3446 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3447 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3448 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3449 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3450 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3451 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3452 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3453 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3454 | #endif | |
930d6ff2 | 3455 | #endif |
fbea49e1 | 3456 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3457 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3458 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3459 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3460 | #endif | |
1da177e4 LT |
3461 | } |
3462 | ||
339bf98f TG |
3463 | static inline size_t inet6_if_nlmsg_size(void) |
3464 | { | |
3465 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3466 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3467 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3468 | + nla_total_size(4) /* IFLA_MTU */ | |
3469 | + nla_total_size(4) /* IFLA_LINK */ | |
3470 | + nla_total_size( /* IFLA_PROTINFO */ | |
3471 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3472 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3473 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3474 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3475 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3476 | ); |
3477 | } | |
c5396a31 | 3478 | |
7f7d9a6b HX |
3479 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3480 | int bytes) | |
3481 | { | |
3482 | int i; | |
3483 | int pad = bytes - sizeof(u64) * items; | |
3484 | BUG_ON(pad < 0); | |
3485 | ||
3486 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3487 | put_unaligned(items, &stats[0]); | |
3488 | for (i = 1; i < items; i++) | |
3489 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3490 | ||
3491 | memset(&stats[items], 0, pad); | |
3492 | } | |
3493 | ||
3494 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3495 | int bytes) | |
3496 | { | |
3497 | switch(attrtype) { | |
3498 | case IFLA_INET6_STATS: | |
3499 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3500 | break; | |
3501 | case IFLA_INET6_ICMP6STATS: | |
3502 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3503 | break; | |
3504 | } | |
3505 | } | |
3506 | ||
1ab1457c | 3507 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3508 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3509 | { |
04561c1f | 3510 | struct net_device *dev = idev->dev; |
bf99f1bd | 3511 | struct nlattr *nla; |
04561c1f TG |
3512 | struct ifinfomsg *hdr; |
3513 | struct nlmsghdr *nlh; | |
3514 | void *protoinfo; | |
3515 | struct ifla_cacheinfo ci; | |
3516 | ||
3517 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3518 | if (nlh == NULL) | |
26932566 | 3519 | return -EMSGSIZE; |
04561c1f TG |
3520 | |
3521 | hdr = nlmsg_data(nlh); | |
3522 | hdr->ifi_family = AF_INET6; | |
3523 | hdr->__ifi_pad = 0; | |
3524 | hdr->ifi_type = dev->type; | |
3525 | hdr->ifi_index = dev->ifindex; | |
3526 | hdr->ifi_flags = dev_get_flags(dev); | |
3527 | hdr->ifi_change = 0; | |
3528 | ||
3529 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3530 | |
3531 | if (dev->addr_len) | |
04561c1f | 3532 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3533 | |
04561c1f | 3534 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3535 | if (dev->ifindex != dev->iflink) |
04561c1f | 3536 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3537 | |
04561c1f TG |
3538 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3539 | if (protoinfo == NULL) | |
3540 | goto nla_put_failure; | |
1da177e4 | 3541 | |
04561c1f | 3542 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3543 | |
1da177e4 LT |
3544 | ci.max_reasm_len = IPV6_MAXPLEN; |
3545 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3546 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3547 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3548 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3549 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3550 | ||
bf99f1bd YH |
3551 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3552 | if (nla == NULL) | |
04561c1f | 3553 | goto nla_put_failure; |
bf99f1bd | 3554 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3555 | |
bf99f1bd YH |
3556 | /* XXX - MC not implemented */ |
3557 | ||
3558 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3559 | if (nla == NULL) | |
3560 | goto nla_put_failure; | |
3561 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3562 | ||
3563 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3564 | if (nla == NULL) | |
3565 | goto nla_put_failure; | |
3566 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3567 | |
04561c1f TG |
3568 | nla_nest_end(skb, protoinfo); |
3569 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3570 | |
04561c1f | 3571 | nla_put_failure: |
26932566 PM |
3572 | nlmsg_cancel(skb, nlh); |
3573 | return -EMSGSIZE; | |
1da177e4 LT |
3574 | } |
3575 | ||
3576 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3577 | { | |
3578 | int idx, err; | |
3579 | int s_idx = cb->args[0]; | |
3580 | struct net_device *dev; | |
3581 | struct inet6_dev *idev; | |
3582 | ||
3583 | read_lock(&dev_base_lock); | |
7562f876 PE |
3584 | idx = 0; |
3585 | for_each_netdev(dev) { | |
1da177e4 | 3586 | if (idx < s_idx) |
7562f876 | 3587 | goto cont; |
1da177e4 | 3588 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3589 | goto cont; |
1ab1457c | 3590 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3591 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3592 | in6_dev_put(idev); |
3593 | if (err <= 0) | |
3594 | break; | |
7562f876 PE |
3595 | cont: |
3596 | idx++; | |
1da177e4 LT |
3597 | } |
3598 | read_unlock(&dev_base_lock); | |
3599 | cb->args[0] = idx; | |
3600 | ||
3601 | return skb->len; | |
3602 | } | |
3603 | ||
3604 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3605 | { | |
3606 | struct sk_buff *skb; | |
8d7a76c9 | 3607 | int err = -ENOBUFS; |
1ab1457c | 3608 | |
339bf98f | 3609 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3610 | if (skb == NULL) |
3611 | goto errout; | |
3612 | ||
3613 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3614 | if (err < 0) { |
3615 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3616 | WARN_ON(err == -EMSGSIZE); | |
3617 | kfree_skb(skb); | |
3618 | goto errout; | |
3619 | } | |
8d7a76c9 TG |
3620 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3621 | errout: | |
3622 | if (err < 0) | |
3623 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3624 | } |
3625 | ||
339bf98f TG |
3626 | static inline size_t inet6_prefix_nlmsg_size(void) |
3627 | { | |
3628 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3629 | + nla_total_size(sizeof(struct in6_addr)) | |
3630 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3631 | } | |
c5396a31 | 3632 | |
1da177e4 | 3633 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3634 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3635 | int event, unsigned int flags) | |
1da177e4 | 3636 | { |
6051e2f4 TG |
3637 | struct prefixmsg *pmsg; |
3638 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3639 | struct prefix_cacheinfo ci; |
3640 | ||
6051e2f4 TG |
3641 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3642 | if (nlh == NULL) | |
26932566 | 3643 | return -EMSGSIZE; |
6051e2f4 TG |
3644 | |
3645 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3646 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3647 | pmsg->prefix_pad1 = 0; |
3648 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3649 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3650 | pmsg->prefix_len = pinfo->prefix_len; | |
3651 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3652 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3653 | pmsg->prefix_flags = 0; |
3654 | if (pinfo->onlink) | |
3655 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3656 | if (pinfo->autoconf) | |
3657 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3658 | ||
6051e2f4 | 3659 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3660 | |
3661 | ci.preferred_time = ntohl(pinfo->prefered); | |
3662 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3663 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3664 | |
6051e2f4 | 3665 | return nlmsg_end(skb, nlh); |
1da177e4 | 3666 | |
6051e2f4 | 3667 | nla_put_failure: |
26932566 PM |
3668 | nlmsg_cancel(skb, nlh); |
3669 | return -EMSGSIZE; | |
1da177e4 LT |
3670 | } |
3671 | ||
1ab1457c | 3672 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3673 | struct prefix_info *pinfo) |
3674 | { | |
3675 | struct sk_buff *skb; | |
8c384bfa | 3676 | int err = -ENOBUFS; |
1da177e4 | 3677 | |
339bf98f | 3678 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3679 | if (skb == NULL) |
3680 | goto errout; | |
3681 | ||
3682 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3683 | if (err < 0) { |
3684 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3685 | WARN_ON(err == -EMSGSIZE); | |
3686 | kfree_skb(skb); | |
3687 | goto errout; | |
3688 | } | |
8c384bfa TG |
3689 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3690 | errout: | |
3691 | if (err < 0) | |
3692 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3693 | } |
3694 | ||
1da177e4 LT |
3695 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3696 | { | |
3697 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3698 | ||
3699 | switch (event) { | |
3700 | case RTM_NEWADDR: | |
95c385b4 NH |
3701 | /* |
3702 | * If the address was optimistic | |
3703 | * we inserted the route at the start of | |
3704 | * our DAD process, so we don't need | |
3705 | * to do it again | |
3706 | */ | |
3707 | if (!(ifp->rt->rt6i_node)) | |
3708 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3709 | if (ifp->idev->cnf.forwarding) |
3710 | addrconf_join_anycast(ifp); | |
3711 | break; | |
3712 | case RTM_DELADDR: | |
3713 | if (ifp->idev->cnf.forwarding) | |
3714 | addrconf_leave_anycast(ifp); | |
3715 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3716 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3717 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3718 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3719 | break; |
3720 | } | |
3721 | } | |
3722 | ||
3723 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3724 | { | |
8814c4b5 | 3725 | rcu_read_lock_bh(); |
1da177e4 LT |
3726 | if (likely(ifp->idev->dead == 0)) |
3727 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3728 | rcu_read_unlock_bh(); |
1da177e4 LT |
3729 | } |
3730 | ||
3731 | #ifdef CONFIG_SYSCTL | |
3732 | ||
3733 | static | |
3734 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3735 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3736 | { | |
3737 | int *valp = ctl->data; | |
3738 | int val = *valp; | |
3739 | int ret; | |
3740 | ||
3741 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3742 | ||
3743 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3744 | if (valp != &ipv6_devconf.forwarding) { | |
3745 | if ((!*valp) ^ (!val)) { | |
3746 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3747 | if (idev == NULL) | |
3748 | return ret; | |
3749 | dev_forward_change(idev); | |
3750 | } | |
3751 | } else { | |
3752 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3753 | addrconf_forward_change(); | |
3754 | } | |
3755 | if (*valp) | |
3756 | rt6_purge_dflt_routers(); | |
3757 | } | |
3758 | ||
1ab1457c | 3759 | return ret; |
1da177e4 LT |
3760 | } |
3761 | ||
1ab1457c | 3762 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3763 | int __user *name, int nlen, |
3764 | void __user *oldval, | |
3765 | size_t __user *oldlenp, | |
1f29bcd7 | 3766 | void __user *newval, size_t newlen) |
1da177e4 LT |
3767 | { |
3768 | int *valp = table->data; | |
3769 | int new; | |
3770 | ||
3771 | if (!newval || !newlen) | |
3772 | return 0; | |
3773 | if (newlen != sizeof(int)) | |
3774 | return -EINVAL; | |
3775 | if (get_user(new, (int __user *)newval)) | |
3776 | return -EFAULT; | |
3777 | if (new == *valp) | |
3778 | return 0; | |
3779 | if (oldval && oldlenp) { | |
3780 | size_t len; | |
3781 | if (get_user(len, oldlenp)) | |
3782 | return -EFAULT; | |
3783 | if (len) { | |
3784 | if (len > table->maxlen) | |
3785 | len = table->maxlen; | |
3786 | if (copy_to_user(oldval, valp, len)) | |
3787 | return -EFAULT; | |
3788 | if (put_user(len, oldlenp)) | |
3789 | return -EFAULT; | |
3790 | } | |
3791 | } | |
3792 | ||
3793 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3794 | if (valp != &ipv6_devconf.forwarding) { | |
3795 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3796 | int changed; | |
3797 | if (unlikely(idev == NULL)) | |
3798 | return -ENODEV; | |
3799 | changed = (!*valp) ^ (!new); | |
3800 | *valp = new; | |
3801 | if (changed) | |
3802 | dev_forward_change(idev); | |
3803 | } else { | |
3804 | *valp = new; | |
3805 | addrconf_forward_change(); | |
3806 | } | |
3807 | ||
3808 | if (*valp) | |
3809 | rt6_purge_dflt_routers(); | |
3810 | } else | |
3811 | *valp = new; | |
3812 | ||
3813 | return 1; | |
3814 | } | |
3815 | ||
3816 | static struct addrconf_sysctl_table | |
3817 | { | |
3818 | struct ctl_table_header *sysctl_header; | |
3819 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3820 | ctl_table addrconf_dev[2]; | |
3821 | ctl_table addrconf_conf_dir[2]; | |
3822 | ctl_table addrconf_proto_dir[2]; | |
3823 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3824 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3825 | .sysctl_header = NULL, |
3826 | .addrconf_vars = { | |
1ab1457c | 3827 | { |
1da177e4 LT |
3828 | .ctl_name = NET_IPV6_FORWARDING, |
3829 | .procname = "forwarding", | |
1ab1457c | 3830 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3831 | .maxlen = sizeof(int), |
3832 | .mode = 0644, | |
1ab1457c | 3833 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3834 | .strategy = &addrconf_sysctl_forward_strategy, |
3835 | }, | |
3836 | { | |
3837 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3838 | .procname = "hop_limit", | |
1ab1457c | 3839 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3840 | .maxlen = sizeof(int), |
3841 | .mode = 0644, | |
3842 | .proc_handler = proc_dointvec, | |
3843 | }, | |
3844 | { | |
3845 | .ctl_name = NET_IPV6_MTU, | |
3846 | .procname = "mtu", | |
3847 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3848 | .maxlen = sizeof(int), |
1da177e4 | 3849 | .mode = 0644, |
1ab1457c | 3850 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3851 | }, |
3852 | { | |
3853 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3854 | .procname = "accept_ra", | |
1ab1457c | 3855 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3856 | .maxlen = sizeof(int), |
3857 | .mode = 0644, | |
1ab1457c | 3858 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3859 | }, |
3860 | { | |
3861 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3862 | .procname = "accept_redirects", | |
1ab1457c | 3863 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3864 | .maxlen = sizeof(int), |
3865 | .mode = 0644, | |
1ab1457c | 3866 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3867 | }, |
3868 | { | |
3869 | .ctl_name = NET_IPV6_AUTOCONF, | |
3870 | .procname = "autoconf", | |
1ab1457c | 3871 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3872 | .maxlen = sizeof(int), |
3873 | .mode = 0644, | |
1ab1457c | 3874 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3875 | }, |
3876 | { | |
3877 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3878 | .procname = "dad_transmits", | |
1ab1457c | 3879 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3880 | .maxlen = sizeof(int), |
3881 | .mode = 0644, | |
1ab1457c | 3882 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3883 | }, |
3884 | { | |
3885 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3886 | .procname = "router_solicitations", | |
1ab1457c | 3887 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3888 | .maxlen = sizeof(int), |
3889 | .mode = 0644, | |
1ab1457c | 3890 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3891 | }, |
3892 | { | |
3893 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3894 | .procname = "router_solicitation_interval", | |
1ab1457c | 3895 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3896 | .maxlen = sizeof(int), |
3897 | .mode = 0644, | |
1ab1457c | 3898 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3899 | .strategy = &sysctl_jiffies, |
3900 | }, | |
3901 | { | |
3902 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3903 | .procname = "router_solicitation_delay", | |
1ab1457c | 3904 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3905 | .maxlen = sizeof(int), |
3906 | .mode = 0644, | |
1ab1457c | 3907 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3908 | .strategy = &sysctl_jiffies, |
3909 | }, | |
3910 | { | |
3911 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3912 | .procname = "force_mld_version", | |
1ab1457c | 3913 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3914 | .maxlen = sizeof(int), |
3915 | .mode = 0644, | |
1ab1457c | 3916 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3917 | }, |
3918 | #ifdef CONFIG_IPV6_PRIVACY | |
3919 | { | |
3920 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3921 | .procname = "use_tempaddr", | |
1ab1457c | 3922 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3923 | .maxlen = sizeof(int), |
3924 | .mode = 0644, | |
1ab1457c | 3925 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3926 | }, |
3927 | { | |
3928 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3929 | .procname = "temp_valid_lft", | |
1ab1457c | 3930 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3931 | .maxlen = sizeof(int), |
3932 | .mode = 0644, | |
1ab1457c | 3933 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3934 | }, |
3935 | { | |
3936 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3937 | .procname = "temp_prefered_lft", | |
1ab1457c | 3938 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3939 | .maxlen = sizeof(int), |
3940 | .mode = 0644, | |
1ab1457c | 3941 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3942 | }, |
3943 | { | |
3944 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3945 | .procname = "regen_max_retry", | |
1ab1457c | 3946 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3947 | .maxlen = sizeof(int), |
3948 | .mode = 0644, | |
1ab1457c | 3949 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3950 | }, |
3951 | { | |
3952 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3953 | .procname = "max_desync_factor", | |
1ab1457c | 3954 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3955 | .maxlen = sizeof(int), |
3956 | .mode = 0644, | |
1ab1457c | 3957 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3958 | }, |
3959 | #endif | |
3960 | { | |
3961 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3962 | .procname = "max_addresses", | |
3963 | .data = &ipv6_devconf.max_addresses, | |
3964 | .maxlen = sizeof(int), | |
3965 | .mode = 0644, | |
3966 | .proc_handler = &proc_dointvec, | |
3967 | }, | |
65f5c7c1 YH |
3968 | { |
3969 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3970 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3971 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3972 | .maxlen = sizeof(int), |
3973 | .mode = 0644, | |
1ab1457c | 3974 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3975 | }, |
c4fd30eb YH |
3976 | { |
3977 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3978 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3979 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3980 | .maxlen = sizeof(int), |
3981 | .mode = 0644, | |
1ab1457c | 3982 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3983 | }, |
930d6ff2 YH |
3984 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3985 | { | |
3986 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3987 | .procname = "accept_ra_rtr_pref", | |
3988 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3989 | .maxlen = sizeof(int), | |
3990 | .mode = 0644, | |
3991 | .proc_handler = &proc_dointvec, | |
3992 | }, | |
52e16356 YH |
3993 | { |
3994 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3995 | .procname = "router_probe_interval", | |
3996 | .data = &ipv6_devconf.rtr_probe_interval, | |
3997 | .maxlen = sizeof(int), | |
3998 | .mode = 0644, | |
3999 | .proc_handler = &proc_dointvec_jiffies, | |
4000 | .strategy = &sysctl_jiffies, | |
4001 | }, | |
fa03ef38 | 4002 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4003 | { |
4004 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4005 | .procname = "accept_ra_rt_info_max_plen", | |
4006 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4007 | .maxlen = sizeof(int), | |
4008 | .mode = 0644, | |
4009 | .proc_handler = &proc_dointvec, | |
4010 | }, | |
4011 | #endif | |
930d6ff2 | 4012 | #endif |
fbea49e1 YH |
4013 | { |
4014 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4015 | .procname = "proxy_ndp", | |
4016 | .data = &ipv6_devconf.proxy_ndp, | |
4017 | .maxlen = sizeof(int), | |
4018 | .mode = 0644, | |
4019 | .proc_handler = &proc_dointvec, | |
4020 | }, | |
0bcbc926 YH |
4021 | { |
4022 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4023 | .procname = "accept_source_route", | |
4024 | .data = &ipv6_devconf.accept_source_route, | |
4025 | .maxlen = sizeof(int), | |
4026 | .mode = 0644, | |
4027 | .proc_handler = &proc_dointvec, | |
4028 | }, | |
95c385b4 NH |
4029 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4030 | { | |
4031 | .ctl_name = CTL_UNNUMBERED, | |
4032 | .procname = "optimistic_dad", | |
4033 | .data = &ipv6_devconf.optimistic_dad, | |
4034 | .maxlen = sizeof(int), | |
4035 | .mode = 0644, | |
4036 | .proc_handler = &proc_dointvec, | |
4037 | ||
4038 | }, | |
4039 | #endif | |
1da177e4 LT |
4040 | { |
4041 | .ctl_name = 0, /* sentinel */ | |
4042 | } | |
4043 | }, | |
4044 | .addrconf_dev = { | |
4045 | { | |
4046 | .ctl_name = NET_PROTO_CONF_ALL, | |
4047 | .procname = "all", | |
4048 | .mode = 0555, | |
4049 | .child = addrconf_sysctl.addrconf_vars, | |
4050 | }, | |
4051 | { | |
4052 | .ctl_name = 0, /* sentinel */ | |
4053 | } | |
4054 | }, | |
4055 | .addrconf_conf_dir = { | |
4056 | { | |
4057 | .ctl_name = NET_IPV6_CONF, | |
4058 | .procname = "conf", | |
4059 | .mode = 0555, | |
4060 | .child = addrconf_sysctl.addrconf_dev, | |
4061 | }, | |
4062 | { | |
4063 | .ctl_name = 0, /* sentinel */ | |
4064 | } | |
4065 | }, | |
4066 | .addrconf_proto_dir = { | |
4067 | { | |
4068 | .ctl_name = NET_IPV6, | |
4069 | .procname = "ipv6", | |
4070 | .mode = 0555, | |
4071 | .child = addrconf_sysctl.addrconf_conf_dir, | |
4072 | }, | |
4073 | { | |
4074 | .ctl_name = 0, /* sentinel */ | |
4075 | } | |
4076 | }, | |
4077 | .addrconf_root_dir = { | |
4078 | { | |
4079 | .ctl_name = CTL_NET, | |
4080 | .procname = "net", | |
4081 | .mode = 0555, | |
4082 | .child = addrconf_sysctl.addrconf_proto_dir, | |
4083 | }, | |
4084 | { | |
4085 | .ctl_name = 0, /* sentinel */ | |
4086 | } | |
4087 | }, | |
4088 | }; | |
4089 | ||
4090 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
4091 | { | |
4092 | int i; | |
4093 | struct net_device *dev = idev ? idev->dev : NULL; | |
4094 | struct addrconf_sysctl_table *t; | |
4095 | char *dev_name = NULL; | |
4096 | ||
af879cc7 | 4097 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
4098 | if (t == NULL) |
4099 | return; | |
1da177e4 LT |
4100 | for (i=0; t->addrconf_vars[i].data; i++) { |
4101 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 LT |
4102 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
4103 | } | |
4104 | if (dev) { | |
1ab1457c | 4105 | dev_name = dev->name; |
1da177e4 LT |
4106 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
4107 | } else { | |
4108 | dev_name = "default"; | |
4109 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
4110 | } | |
4111 | ||
1ab1457c YH |
4112 | /* |
4113 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4114 | * by sysctl and we wouldn't want anyone to change it under our feet |
4115 | * (see SIOCSIFNAME). | |
1ab1457c | 4116 | */ |
543537bd | 4117 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
4118 | if (!dev_name) |
4119 | goto free; | |
4120 | ||
4121 | t->addrconf_dev[0].procname = dev_name; | |
4122 | ||
4123 | t->addrconf_dev[0].child = t->addrconf_vars; | |
1da177e4 | 4124 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
1da177e4 | 4125 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
1da177e4 | 4126 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
1da177e4 | 4127 | |
0b4d4147 | 4128 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); |
1da177e4 LT |
4129 | if (t->sysctl_header == NULL) |
4130 | goto free_procname; | |
4131 | else | |
4132 | p->sysctl = t; | |
4133 | return; | |
4134 | ||
4135 | /* error path */ | |
4136 | free_procname: | |
4137 | kfree(dev_name); | |
4138 | free: | |
4139 | kfree(t); | |
4140 | ||
4141 | return; | |
4142 | } | |
4143 | ||
4144 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
4145 | { | |
4146 | if (p->sysctl) { | |
4147 | struct addrconf_sysctl_table *t = p->sysctl; | |
4148 | p->sysctl = NULL; | |
4149 | unregister_sysctl_table(t->sysctl_header); | |
4150 | kfree(t->addrconf_dev[0].procname); | |
4151 | kfree(t); | |
4152 | } | |
4153 | } | |
4154 | ||
4155 | ||
4156 | #endif | |
4157 | ||
4158 | /* | |
4159 | * Device notifier | |
4160 | */ | |
4161 | ||
4162 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4163 | { | |
1ab1457c | 4164 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4165 | } |
4166 | ||
7159039a YH |
4167 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4168 | ||
1da177e4 LT |
4169 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4170 | { | |
1ab1457c | 4171 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4172 | } |
4173 | ||
7159039a YH |
4174 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4175 | ||
1da177e4 LT |
4176 | /* |
4177 | * Init / cleanup code | |
4178 | */ | |
4179 | ||
4180 | int __init addrconf_init(void) | |
4181 | { | |
4182 | int err = 0; | |
4183 | ||
4184 | /* The addrconf netdev notifier requires that loopback_dev | |
4185 | * has it's ipv6 private information allocated and setup | |
4186 | * before it can bring up and give link-local addresses | |
4187 | * to other devices which are up. | |
4188 | * | |
4189 | * Unfortunately, loopback_dev is not necessarily the first | |
4190 | * entry in the global dev_base list of net devices. In fact, | |
4191 | * it is likely to be the very last entry on that list. | |
4192 | * So this causes the notifier registry below to try and | |
4193 | * give link-local addresses to all devices besides loopback_dev | |
4194 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4195 | * devices to fail to get a link-local address. | |
4196 | * | |
4197 | * So, as a temporary fix, allocate the ipv6 structure for | |
4198 | * loopback_dev first by hand. | |
4199 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4200 | * device and it being up should be removed. | |
4201 | */ | |
4202 | rtnl_lock(); | |
4203 | if (!ipv6_add_dev(&loopback_dev)) | |
4204 | err = -ENOMEM; | |
4205 | rtnl_unlock(); | |
4206 | if (err) | |
4207 | return err; | |
4208 | ||
c62dba90 | 4209 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
9a6bf6fe YH |
4210 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
4211 | ip6_prohibit_entry.rt6i_idev = in6_dev_get(&loopback_dev); | |
4212 | ip6_blk_hole_entry.rt6i_idev = in6_dev_get(&loopback_dev); | |
4213 | #endif | |
c62dba90 | 4214 | |
1da177e4 LT |
4215 | register_netdevice_notifier(&ipv6_dev_notf); |
4216 | ||
1da177e4 | 4217 | addrconf_verify(0); |
c127ea2c TG |
4218 | |
4219 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4220 | if (err < 0) | |
4221 | goto errout; | |
4222 | ||
4223 | /* Only the first call to __rtnl_register can fail */ | |
4224 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4225 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4226 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4227 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4228 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4229 | ||
1da177e4 LT |
4230 | #ifdef CONFIG_SYSCTL |
4231 | addrconf_sysctl.sysctl_header = | |
0b4d4147 | 4232 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir); |
1da177e4 LT |
4233 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
4234 | #endif | |
4235 | ||
4236 | return 0; | |
c127ea2c TG |
4237 | errout: |
4238 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4239 | ||
4240 | return err; | |
1da177e4 LT |
4241 | } |
4242 | ||
4243 | void __exit addrconf_cleanup(void) | |
4244 | { | |
1ab1457c | 4245 | struct net_device *dev; |
1ab1457c | 4246 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4247 | int i; |
4248 | ||
4249 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4250 | ||
1da177e4 LT |
4251 | #ifdef CONFIG_SYSCTL |
4252 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4253 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4254 | #endif | |
4255 | ||
4256 | rtnl_lock(); | |
4257 | ||
4258 | /* | |
4259 | * clean dev list. | |
4260 | */ | |
4261 | ||
7562f876 | 4262 | for_each_netdev(dev) { |
dffe4f04 | 4263 | if (__in6_dev_get(dev) == NULL) |
1da177e4 LT |
4264 | continue; |
4265 | addrconf_ifdown(dev, 1); | |
4266 | } | |
4267 | addrconf_ifdown(&loopback_dev, 2); | |
4268 | ||
4269 | /* | |
4270 | * Check hash table. | |
4271 | */ | |
4272 | ||
4273 | write_lock_bh(&addrconf_hash_lock); | |
4274 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4275 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4276 | struct inet6_ifaddr *bifa; | |
4277 | ||
4278 | bifa = ifa; | |
4279 | ifa = ifa->lst_next; | |
4280 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4281 | /* Do not free it; something is wrong. | |
4282 | Now we can investigate it with debugger. | |
4283 | */ | |
4284 | } | |
4285 | } | |
4286 | write_unlock_bh(&addrconf_hash_lock); | |
4287 | ||
4288 | del_timer(&addr_chk_timer); | |
4289 | ||
4290 | rtnl_unlock(); | |
4291 | ||
1da177e4 LT |
4292 | #ifdef CONFIG_PROC_FS |
4293 | proc_net_remove("if_inet6"); | |
4294 | #endif | |
4295 | } |