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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> | |
84 | ||
85 | #include <linux/proc_fs.h> | |
86 | #include <linux/seq_file.h> | |
87 | ||
88 | /* Set to 3 to get tracing... */ | |
89 | #define ACONF_DEBUG 2 | |
90 | ||
91 | #if ACONF_DEBUG >= 3 | |
92 | #define ADBG(x) printk x | |
93 | #else | |
94 | #define ADBG(x) | |
95 | #endif | |
96 | ||
97 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
98 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
99 | ||
100 | #ifdef CONFIG_SYSCTL | |
101 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
102 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
103 | #endif | |
104 | ||
105 | #ifdef CONFIG_IPV6_PRIVACY | |
106 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 107 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
108 | static void ipv6_regen_rndid(unsigned long data); |
109 | ||
110 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
111 | #endif |
112 | ||
113 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
114 | ||
115 | /* | |
116 | * Configured unicast address hash table | |
117 | */ | |
118 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
119 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
120 | ||
1da177e4 LT |
121 | static void addrconf_verify(unsigned long); |
122 | ||
8d06afab | 123 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
124 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
125 | ||
126 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
127 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
128 | ||
129 | static int addrconf_ifdown(struct net_device *dev, int how); | |
130 | ||
e431b8c0 | 131 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
132 | static void addrconf_dad_timer(unsigned long data); |
133 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 134 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
135 | static void addrconf_rs_timer(unsigned long data); |
136 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
137 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
138 | ||
1ab1457c | 139 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
140 | struct prefix_info *pinfo); |
141 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
142 | ||
e041c683 | 143 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 144 | |
ab32ea5d | 145 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
146 | .forwarding = 0, |
147 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
148 | .mtu6 = IPV6_MIN_MTU, | |
149 | .accept_ra = 1, | |
150 | .accept_redirects = 1, | |
151 | .autoconf = 1, | |
152 | .force_mld_version = 0, | |
153 | .dad_transmits = 1, | |
154 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
155 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
156 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
157 | #ifdef CONFIG_IPV6_PRIVACY | |
158 | .use_tempaddr = 0, | |
159 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
160 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
161 | .regen_max_retry = REGEN_MAX_RETRY, | |
162 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
163 | #endif | |
164 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 165 | .accept_ra_defrtr = 1, |
c4fd30eb | 166 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
167 | #ifdef CONFIG_IPV6_ROUTER_PREF |
168 | .accept_ra_rtr_pref = 1, | |
52e16356 | 169 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
170 | #ifdef CONFIG_IPV6_ROUTE_INFO |
171 | .accept_ra_rt_info_max_plen = 0, | |
172 | #endif | |
930d6ff2 | 173 | #endif |
fbea49e1 | 174 | .proxy_ndp = 0, |
1da177e4 LT |
175 | }; |
176 | ||
ab32ea5d | 177 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
178 | .forwarding = 0, |
179 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
180 | .mtu6 = IPV6_MIN_MTU, | |
181 | .accept_ra = 1, | |
182 | .accept_redirects = 1, | |
183 | .autoconf = 1, | |
184 | .dad_transmits = 1, | |
185 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
186 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
187 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
188 | #ifdef CONFIG_IPV6_PRIVACY | |
189 | .use_tempaddr = 0, | |
190 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
191 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
192 | .regen_max_retry = REGEN_MAX_RETRY, | |
193 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
194 | #endif | |
195 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 196 | .accept_ra_defrtr = 1, |
c4fd30eb | 197 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
198 | #ifdef CONFIG_IPV6_ROUTER_PREF |
199 | .accept_ra_rtr_pref = 1, | |
52e16356 | 200 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
201 | #ifdef CONFIG_IPV6_ROUTE_INFO |
202 | .accept_ra_rt_info_max_plen = 0, | |
203 | #endif | |
930d6ff2 | 204 | #endif |
fbea49e1 | 205 | .proxy_ndp = 0, |
1da177e4 LT |
206 | }; |
207 | ||
208 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
209 | #if 0 | |
210 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
211 | #endif | |
212 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
213 | ||
1da177e4 LT |
214 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
215 | { | |
216 | if (del_timer(&ifp->timer)) | |
217 | __in6_ifa_put(ifp); | |
218 | } | |
219 | ||
220 | enum addrconf_timer_t | |
221 | { | |
222 | AC_NONE, | |
223 | AC_DAD, | |
224 | AC_RS, | |
225 | }; | |
226 | ||
227 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
228 | enum addrconf_timer_t what, | |
229 | unsigned long when) | |
230 | { | |
231 | if (!del_timer(&ifp->timer)) | |
232 | in6_ifa_hold(ifp); | |
233 | ||
234 | switch (what) { | |
235 | case AC_DAD: | |
236 | ifp->timer.function = addrconf_dad_timer; | |
237 | break; | |
238 | case AC_RS: | |
239 | ifp->timer.function = addrconf_rs_timer; | |
240 | break; | |
241 | default:; | |
242 | } | |
243 | ifp->timer.expires = jiffies + when; | |
244 | add_timer(&ifp->timer); | |
245 | } | |
246 | ||
247 | /* Nobody refers to this device, we may destroy it. */ | |
248 | ||
8814c4b5 YH |
249 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
250 | { | |
251 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
252 | kfree(idev); | |
253 | } | |
254 | ||
1da177e4 LT |
255 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
256 | { | |
257 | struct net_device *dev = idev->dev; | |
258 | BUG_TRAP(idev->addr_list==NULL); | |
259 | BUG_TRAP(idev->mc_list==NULL); | |
260 | #ifdef NET_REFCNT_DEBUG | |
261 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
262 | #endif | |
263 | dev_put(dev); | |
264 | if (!idev->dead) { | |
265 | printk("Freeing alive inet6 device %p\n", idev); | |
266 | return; | |
267 | } | |
268 | snmp6_free_dev(idev); | |
8814c4b5 | 269 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
270 | } |
271 | ||
272 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
273 | { | |
274 | struct inet6_dev *ndev; | |
d88ae4cc | 275 | struct in6_addr maddr; |
1da177e4 LT |
276 | |
277 | ASSERT_RTNL(); | |
278 | ||
279 | if (dev->mtu < IPV6_MIN_MTU) | |
280 | return NULL; | |
281 | ||
1ab1457c | 282 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 283 | |
1ab1457c YH |
284 | if (ndev == NULL) |
285 | return NULL; | |
322f74a4 IO |
286 | |
287 | rwlock_init(&ndev->lock); | |
288 | ndev->dev = dev; | |
289 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
290 | ndev->cnf.mtu6 = dev->mtu; | |
291 | ndev->cnf.sysctl = NULL; | |
292 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
293 | if (ndev->nd_parms == NULL) { | |
294 | kfree(ndev); | |
295 | return NULL; | |
296 | } | |
297 | /* We refer to the device */ | |
298 | dev_hold(dev); | |
1da177e4 | 299 | |
322f74a4 IO |
300 | if (snmp6_alloc_dev(ndev) < 0) { |
301 | ADBG((KERN_WARNING | |
302 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
303 | __FUNCTION__, dev->name)); | |
304 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
305 | ndev->dead = 1; | |
306 | in6_dev_finish_destroy(ndev); | |
307 | return NULL; | |
308 | } | |
1da177e4 | 309 | |
322f74a4 IO |
310 | if (snmp6_register_dev(ndev) < 0) { |
311 | ADBG((KERN_WARNING | |
312 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
313 | __FUNCTION__, dev->name)); | |
314 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
315 | ndev->dead = 1; | |
316 | in6_dev_finish_destroy(ndev); | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | /* One reference from device. We must do this before | |
321 | * we invoke __ipv6_regen_rndid(). | |
322 | */ | |
323 | in6_dev_hold(ndev); | |
1da177e4 LT |
324 | |
325 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
326 | init_timer(&ndev->regen_timer); |
327 | ndev->regen_timer.function = ipv6_regen_rndid; | |
328 | ndev->regen_timer.data = (unsigned long) ndev; | |
329 | if ((dev->flags&IFF_LOOPBACK) || | |
330 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
331 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
332 | dev->type == ARPHRD_SIT || | |
333 | #endif | |
334 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
335 | printk(KERN_INFO |
336 | "%s: Disabled Privacy Extensions\n", | |
337 | dev->name); | |
338 | ndev->cnf.use_tempaddr = -1; | |
339 | } else { | |
340 | in6_dev_hold(ndev); | |
341 | ipv6_regen_rndid((unsigned long) ndev); | |
342 | } | |
1da177e4 LT |
343 | #endif |
344 | ||
322f74a4 IO |
345 | if (netif_carrier_ok(dev)) |
346 | ndev->if_flags |= IF_READY; | |
3c21edbd | 347 | |
1da177e4 | 348 | |
322f74a4 IO |
349 | ipv6_mc_init_dev(ndev); |
350 | ndev->tstamp = jiffies; | |
1da177e4 | 351 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
352 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
353 | NET_IPV6_NEIGH, "ipv6", | |
354 | &ndisc_ifinfo_sysctl_change, | |
355 | NULL); | |
356 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 357 | #endif |
30c4cf57 DS |
358 | /* protected by rtnl_lock */ |
359 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
360 | |
361 | /* Join all-node multicast group */ | |
362 | ipv6_addr_all_nodes(&maddr); | |
363 | ipv6_dev_mc_inc(dev, &maddr); | |
364 | ||
1da177e4 LT |
365 | return ndev; |
366 | } | |
367 | ||
368 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
369 | { | |
370 | struct inet6_dev *idev; | |
371 | ||
372 | ASSERT_RTNL(); | |
373 | ||
374 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
375 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
376 | return NULL; | |
377 | } | |
c5e33bdd | 378 | |
1da177e4 LT |
379 | if (dev->flags&IFF_UP) |
380 | ipv6_mc_up(idev); | |
381 | return idev; | |
382 | } | |
383 | ||
384 | #ifdef CONFIG_SYSCTL | |
385 | static void dev_forward_change(struct inet6_dev *idev) | |
386 | { | |
387 | struct net_device *dev; | |
388 | struct inet6_ifaddr *ifa; | |
389 | struct in6_addr addr; | |
390 | ||
391 | if (!idev) | |
392 | return; | |
393 | dev = idev->dev; | |
394 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
395 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 396 | |
1da177e4 LT |
397 | if (idev->cnf.forwarding) |
398 | ipv6_dev_mc_inc(dev, &addr); | |
399 | else | |
400 | ipv6_dev_mc_dec(dev, &addr); | |
401 | } | |
402 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
403 | if (idev->cnf.forwarding) | |
404 | addrconf_join_anycast(ifa); | |
405 | else | |
406 | addrconf_leave_anycast(ifa); | |
407 | } | |
408 | } | |
409 | ||
410 | ||
411 | static void addrconf_forward_change(void) | |
412 | { | |
413 | struct net_device *dev; | |
414 | struct inet6_dev *idev; | |
415 | ||
416 | read_lock(&dev_base_lock); | |
417 | for (dev=dev_base; dev; dev=dev->next) { | |
8814c4b5 | 418 | rcu_read_lock(); |
1da177e4 LT |
419 | idev = __in6_dev_get(dev); |
420 | if (idev) { | |
421 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
422 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
423 | if (changed) | |
424 | dev_forward_change(idev); | |
425 | } | |
8814c4b5 | 426 | rcu_read_unlock(); |
1da177e4 LT |
427 | } |
428 | read_unlock(&dev_base_lock); | |
429 | } | |
430 | #endif | |
431 | ||
432 | /* Nobody refers to this ifaddr, destroy it */ | |
433 | ||
434 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
435 | { | |
436 | BUG_TRAP(ifp->if_next==NULL); | |
437 | BUG_TRAP(ifp->lst_next==NULL); | |
438 | #ifdef NET_REFCNT_DEBUG | |
439 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
440 | #endif | |
441 | ||
442 | in6_dev_put(ifp->idev); | |
443 | ||
444 | if (del_timer(&ifp->timer)) | |
445 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
446 | ||
447 | if (!ifp->dead) { | |
448 | printk("Freeing alive inet6 address %p\n", ifp); | |
449 | return; | |
450 | } | |
451 | dst_release(&ifp->rt->u.dst); | |
452 | ||
453 | kfree(ifp); | |
454 | } | |
455 | ||
e55ffac6 BH |
456 | static void |
457 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
458 | { | |
459 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 460 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
461 | |
462 | /* | |
463 | * Each device address list is sorted in order of scope - | |
464 | * global before linklocal. | |
465 | */ | |
466 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
467 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 468 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
469 | break; |
470 | } | |
471 | ||
472 | ifp->if_next = *ifap; | |
473 | *ifap = ifp; | |
474 | } | |
475 | ||
1da177e4 LT |
476 | /* On success it returns ifp with increased reference count */ |
477 | ||
478 | static struct inet6_ifaddr * | |
479 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 480 | int scope, u32 flags) |
1da177e4 LT |
481 | { |
482 | struct inet6_ifaddr *ifa = NULL; | |
483 | struct rt6_info *rt; | |
484 | int hash; | |
485 | int err = 0; | |
486 | ||
8814c4b5 | 487 | rcu_read_lock_bh(); |
1da177e4 LT |
488 | if (idev->dead) { |
489 | err = -ENODEV; /*XXX*/ | |
490 | goto out2; | |
491 | } | |
492 | ||
493 | write_lock(&addrconf_hash_lock); | |
494 | ||
495 | /* Ignore adding duplicate addresses on an interface */ | |
496 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
497 | ADBG(("ipv6_add_addr: already assigned\n")); | |
498 | err = -EEXIST; | |
499 | goto out; | |
500 | } | |
501 | ||
322f74a4 | 502 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
503 | |
504 | if (ifa == NULL) { | |
505 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
506 | err = -ENOBUFS; | |
507 | goto out; | |
508 | } | |
509 | ||
510 | rt = addrconf_dst_alloc(idev, addr, 0); | |
511 | if (IS_ERR(rt)) { | |
512 | err = PTR_ERR(rt); | |
513 | goto out; | |
514 | } | |
515 | ||
1da177e4 LT |
516 | ipv6_addr_copy(&ifa->addr, addr); |
517 | ||
518 | spin_lock_init(&ifa->lock); | |
519 | init_timer(&ifa->timer); | |
520 | ifa->timer.data = (unsigned long) ifa; | |
521 | ifa->scope = scope; | |
522 | ifa->prefix_len = pfxlen; | |
523 | ifa->flags = flags | IFA_F_TENTATIVE; | |
524 | ifa->cstamp = ifa->tstamp = jiffies; | |
525 | ||
57f5f544 KF |
526 | ifa->rt = rt; |
527 | ||
1da177e4 LT |
528 | ifa->idev = idev; |
529 | in6_dev_hold(idev); | |
530 | /* For caller */ | |
531 | in6_ifa_hold(ifa); | |
532 | ||
533 | /* Add to big hash table */ | |
534 | hash = ipv6_addr_hash(addr); | |
535 | ||
536 | ifa->lst_next = inet6_addr_lst[hash]; | |
537 | inet6_addr_lst[hash] = ifa; | |
538 | in6_ifa_hold(ifa); | |
539 | write_unlock(&addrconf_hash_lock); | |
540 | ||
541 | write_lock(&idev->lock); | |
542 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 543 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
544 | |
545 | #ifdef CONFIG_IPV6_PRIVACY | |
546 | if (ifa->flags&IFA_F_TEMPORARY) { | |
547 | ifa->tmp_next = idev->tempaddr_list; | |
548 | idev->tempaddr_list = ifa; | |
549 | in6_ifa_hold(ifa); | |
550 | } | |
551 | #endif | |
552 | ||
1da177e4 LT |
553 | in6_ifa_hold(ifa); |
554 | write_unlock(&idev->lock); | |
555 | out2: | |
8814c4b5 | 556 | rcu_read_unlock_bh(); |
1da177e4 | 557 | |
fd92833a | 558 | if (likely(err == 0)) |
e041c683 | 559 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
560 | else { |
561 | kfree(ifa); | |
562 | ifa = ERR_PTR(err); | |
563 | } | |
564 | ||
565 | return ifa; | |
566 | out: | |
567 | write_unlock(&addrconf_hash_lock); | |
568 | goto out2; | |
569 | } | |
570 | ||
571 | /* This function wants to get referenced ifp and releases it before return */ | |
572 | ||
573 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
574 | { | |
575 | struct inet6_ifaddr *ifa, **ifap; | |
576 | struct inet6_dev *idev = ifp->idev; | |
577 | int hash; | |
578 | int deleted = 0, onlink = 0; | |
579 | unsigned long expires = jiffies; | |
580 | ||
581 | hash = ipv6_addr_hash(&ifp->addr); | |
582 | ||
583 | ifp->dead = 1; | |
584 | ||
585 | write_lock_bh(&addrconf_hash_lock); | |
586 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
587 | ifap = &ifa->lst_next) { | |
588 | if (ifa == ifp) { | |
589 | *ifap = ifa->lst_next; | |
590 | __in6_ifa_put(ifp); | |
591 | ifa->lst_next = NULL; | |
592 | break; | |
593 | } | |
594 | } | |
595 | write_unlock_bh(&addrconf_hash_lock); | |
596 | ||
597 | write_lock_bh(&idev->lock); | |
598 | #ifdef CONFIG_IPV6_PRIVACY | |
599 | if (ifp->flags&IFA_F_TEMPORARY) { | |
600 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
601 | ifap = &ifa->tmp_next) { | |
602 | if (ifa == ifp) { | |
603 | *ifap = ifa->tmp_next; | |
604 | if (ifp->ifpub) { | |
605 | in6_ifa_put(ifp->ifpub); | |
606 | ifp->ifpub = NULL; | |
607 | } | |
608 | __in6_ifa_put(ifp); | |
609 | ifa->tmp_next = NULL; | |
610 | break; | |
611 | } | |
612 | } | |
613 | } | |
614 | #endif | |
615 | ||
1d142804 | 616 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
617 | if (ifa == ifp) { |
618 | *ifap = ifa->if_next; | |
619 | __in6_ifa_put(ifp); | |
620 | ifa->if_next = NULL; | |
621 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
622 | break; | |
623 | deleted = 1; | |
1d142804 | 624 | continue; |
1da177e4 LT |
625 | } else if (ifp->flags & IFA_F_PERMANENT) { |
626 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
627 | ifp->prefix_len)) { | |
628 | if (ifa->flags & IFA_F_PERMANENT) { | |
629 | onlink = 1; | |
630 | if (deleted) | |
631 | break; | |
632 | } else { | |
633 | unsigned long lifetime; | |
634 | ||
635 | if (!onlink) | |
636 | onlink = -1; | |
637 | ||
638 | spin_lock(&ifa->lock); | |
639 | lifetime = min_t(unsigned long, | |
640 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
641 | if (time_before(expires, | |
642 | ifa->tstamp + lifetime * HZ)) | |
643 | expires = ifa->tstamp + lifetime * HZ; | |
644 | spin_unlock(&ifa->lock); | |
645 | } | |
646 | } | |
647 | } | |
1d142804 | 648 | ifap = &ifa->if_next; |
1da177e4 LT |
649 | } |
650 | write_unlock_bh(&idev->lock); | |
651 | ||
652 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
653 | ||
e041c683 | 654 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
655 | |
656 | addrconf_del_timer(ifp); | |
657 | ||
658 | /* | |
659 | * Purge or update corresponding prefix | |
660 | * | |
661 | * 1) we don't purge prefix here if address was not permanent. | |
662 | * prefix is managed by its own lifetime. | |
663 | * 2) if there're no addresses, delete prefix. | |
664 | * 3) if there're still other permanent address(es), | |
665 | * corresponding prefix is still permanent. | |
666 | * 4) otherwise, update prefix lifetime to the | |
667 | * longest valid lifetime among the corresponding | |
668 | * addresses on the device. | |
669 | * Note: subsequent RA will update lifetime. | |
670 | * | |
671 | * --yoshfuji | |
672 | */ | |
673 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
674 | struct in6_addr prefix; | |
675 | struct rt6_info *rt; | |
676 | ||
677 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
678 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
679 | ||
680 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
681 | if (onlink == 0) { | |
e0a1ad73 | 682 | ip6_del_rt(rt); |
1da177e4 LT |
683 | rt = NULL; |
684 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
685 | rt->rt6i_expires = expires; | |
686 | rt->rt6i_flags |= RTF_EXPIRES; | |
687 | } | |
688 | } | |
689 | dst_release(&rt->u.dst); | |
690 | } | |
691 | ||
692 | in6_ifa_put(ifp); | |
693 | } | |
694 | ||
695 | #ifdef CONFIG_IPV6_PRIVACY | |
696 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
697 | { | |
698 | struct inet6_dev *idev = ifp->idev; | |
699 | struct in6_addr addr, *tmpaddr; | |
700 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
701 | int tmp_plen; | |
702 | int ret = 0; | |
703 | int max_addresses; | |
704 | ||
705 | write_lock(&idev->lock); | |
706 | if (ift) { | |
707 | spin_lock_bh(&ift->lock); | |
708 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
709 | spin_unlock_bh(&ift->lock); | |
710 | tmpaddr = &addr; | |
711 | } else { | |
712 | tmpaddr = NULL; | |
713 | } | |
714 | retry: | |
715 | in6_dev_hold(idev); | |
716 | if (idev->cnf.use_tempaddr <= 0) { | |
717 | write_unlock(&idev->lock); | |
718 | printk(KERN_INFO | |
719 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
720 | in6_dev_put(idev); | |
721 | ret = -1; | |
722 | goto out; | |
723 | } | |
724 | spin_lock_bh(&ifp->lock); | |
725 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
726 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
727 | spin_unlock_bh(&ifp->lock); | |
728 | write_unlock(&idev->lock); | |
729 | printk(KERN_WARNING | |
730 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
731 | in6_dev_put(idev); | |
732 | ret = -1; | |
733 | goto out; | |
734 | } | |
735 | in6_ifa_hold(ifp); | |
736 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
737 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
738 | spin_unlock_bh(&ifp->lock); | |
739 | write_unlock(&idev->lock); | |
740 | printk(KERN_WARNING | |
741 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
742 | in6_ifa_put(ifp); | |
743 | in6_dev_put(idev); | |
744 | ret = -1; | |
745 | goto out; | |
746 | } | |
747 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
748 | tmp_valid_lft = min_t(__u32, | |
749 | ifp->valid_lft, | |
750 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
751 | tmp_prefered_lft = min_t(__u32, |
752 | ifp->prefered_lft, | |
1da177e4 LT |
753 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
754 | tmp_plen = ifp->prefix_len; | |
755 | max_addresses = idev->cnf.max_addresses; | |
756 | tmp_cstamp = ifp->cstamp; | |
757 | tmp_tstamp = ifp->tstamp; | |
758 | spin_unlock_bh(&ifp->lock); | |
759 | ||
760 | write_unlock(&idev->lock); | |
761 | ift = !max_addresses || | |
1ab1457c | 762 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 LT |
763 | ipv6_add_addr(idev, &addr, tmp_plen, |
764 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
765 | if (!ift || IS_ERR(ift)) { | |
766 | in6_ifa_put(ifp); | |
767 | in6_dev_put(idev); | |
768 | printk(KERN_INFO | |
769 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
770 | tmpaddr = &addr; | |
771 | write_lock(&idev->lock); | |
772 | goto retry; | |
773 | } | |
774 | ||
775 | spin_lock_bh(&ift->lock); | |
776 | ift->ifpub = ifp; | |
777 | ift->valid_lft = tmp_valid_lft; | |
778 | ift->prefered_lft = tmp_prefered_lft; | |
779 | ift->cstamp = tmp_cstamp; | |
780 | ift->tstamp = tmp_tstamp; | |
781 | spin_unlock_bh(&ift->lock); | |
782 | ||
783 | addrconf_dad_start(ift, 0); | |
784 | in6_ifa_put(ift); | |
785 | in6_dev_put(idev); | |
786 | out: | |
787 | return ret; | |
788 | } | |
789 | #endif | |
790 | ||
791 | /* | |
072047e4 | 792 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 793 | */ |
072047e4 YH |
794 | struct ipv6_saddr_score { |
795 | int addr_type; | |
796 | unsigned int attrs; | |
797 | int matchlen; | |
0d27b427 | 798 | int scope; |
072047e4 YH |
799 | unsigned int rule; |
800 | }; | |
801 | ||
802 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
803 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
804 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
805 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
806 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
807 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
808 | ||
809 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 810 | { |
072047e4 YH |
811 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
812 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
813 | return 1; | |
814 | return 0; | |
1da177e4 LT |
815 | } |
816 | ||
072047e4 YH |
817 | /* static matching label */ |
818 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
819 | { | |
820 | /* | |
821 | * prefix (longest match) label | |
822 | * ----------------------------- | |
823 | * ::1/128 0 | |
824 | * ::/0 1 | |
825 | * 2002::/16 2 | |
826 | * ::/96 3 | |
827 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
828 | * fc00::/7 5 |
829 | * 2001::/32 6 | |
072047e4 YH |
830 | */ |
831 | if (type & IPV6_ADDR_LOOPBACK) | |
832 | return 0; | |
833 | else if (type & IPV6_ADDR_COMPATv4) | |
834 | return 3; | |
835 | else if (type & IPV6_ADDR_MAPPED) | |
836 | return 4; | |
102128e3 ŁS |
837 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
838 | return 6; | |
072047e4 YH |
839 | else if (addr->s6_addr16[0] == htons(0x2002)) |
840 | return 2; | |
102128e3 ŁS |
841 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
842 | return 5; | |
072047e4 YH |
843 | return 1; |
844 | } | |
1da177e4 | 845 | |
072047e4 | 846 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
847 | struct in6_addr *daddr, struct in6_addr *saddr) |
848 | { | |
072047e4 YH |
849 | struct ipv6_saddr_score hiscore; |
850 | struct inet6_ifaddr *ifa_result = NULL; | |
851 | int daddr_type = __ipv6_addr_type(daddr); | |
852 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
853 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
854 | struct net_device *dev; | |
1da177e4 | 855 | |
072047e4 | 856 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 857 | |
072047e4 | 858 | read_lock(&dev_base_lock); |
8814c4b5 | 859 | rcu_read_lock(); |
1da177e4 | 860 | |
072047e4 YH |
861 | for (dev = dev_base; dev; dev=dev->next) { |
862 | struct inet6_dev *idev; | |
863 | struct inet6_ifaddr *ifa; | |
864 | ||
865 | /* Rule 0: Candidate Source Address (section 4) | |
866 | * - multicast and link-local destination address, | |
867 | * the set of candidate source address MUST only | |
868 | * include addresses assigned to interfaces | |
869 | * belonging to the same link as the outgoing | |
870 | * interface. | |
871 | * (- For site-local destination addresses, the | |
872 | * set of candidate source addresses MUST only | |
873 | * include addresses assigned to interfaces | |
874 | * belonging to the same site as the outgoing | |
875 | * interface.) | |
876 | */ | |
877 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
878 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
879 | daddr_dev && dev != daddr_dev) | |
880 | continue; | |
1da177e4 | 881 | |
1da177e4 | 882 | idev = __in6_dev_get(dev); |
072047e4 YH |
883 | if (!idev) |
884 | continue; | |
885 | ||
886 | read_lock_bh(&idev->lock); | |
887 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
888 | struct ipv6_saddr_score score; | |
889 | ||
890 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
891 | ||
6b3ae80a YH |
892 | /* Rule 0: |
893 | * - Tentative Address (RFC2462 section 5.4) | |
894 | * - A tentative address is not considered | |
895 | * "assigned to an interface" in the traditional | |
896 | * sense. | |
897 | * - Candidate Source Address (section 4) | |
072047e4 YH |
898 | * - In any case, anycast addresses, multicast |
899 | * addresses, and the unspecified address MUST | |
900 | * NOT be included in a candidate set. | |
901 | */ | |
6b3ae80a YH |
902 | if (ifa->flags & IFA_F_TENTATIVE) |
903 | continue; | |
072047e4 YH |
904 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
905 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
906 | LIMIT_NETDEBUG(KERN_DEBUG | |
907 | "ADDRCONF: unspecified / multicast address" | |
908 | "assigned as unicast address on %s", | |
909 | dev->name); | |
910 | continue; | |
911 | } | |
912 | ||
913 | score.attrs = 0; | |
914 | score.matchlen = 0; | |
915 | score.scope = 0; | |
916 | score.rule = 0; | |
917 | ||
918 | if (ifa_result == NULL) { | |
919 | /* record it if the first available entry */ | |
920 | goto record_it; | |
921 | } | |
922 | ||
923 | /* Rule 1: Prefer same address */ | |
924 | if (hiscore.rule < 1) { | |
925 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
926 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
927 | hiscore.rule++; | |
928 | } | |
929 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
930 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
931 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
932 | score.rule = 1; | |
933 | goto record_it; | |
1da177e4 | 934 | } |
072047e4 YH |
935 | } else { |
936 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
937 | continue; | |
1da177e4 | 938 | } |
1da177e4 | 939 | |
072047e4 YH |
940 | /* Rule 2: Prefer appropriate scope */ |
941 | if (hiscore.rule < 2) { | |
942 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
943 | hiscore.rule++; | |
944 | } | |
945 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
946 | if (hiscore.scope < score.scope) { | |
947 | if (hiscore.scope < daddr_scope) { | |
948 | score.rule = 2; | |
949 | goto record_it; | |
950 | } else | |
951 | continue; | |
952 | } else if (score.scope < hiscore.scope) { | |
953 | if (score.scope < daddr_scope) | |
e55ffac6 | 954 | break; /* addresses sorted by scope */ |
072047e4 YH |
955 | else { |
956 | score.rule = 2; | |
957 | goto record_it; | |
958 | } | |
959 | } | |
1da177e4 | 960 | |
072047e4 YH |
961 | /* Rule 3: Avoid deprecated address */ |
962 | if (hiscore.rule < 3) { | |
963 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
964 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
965 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
966 | hiscore.rule++; | |
967 | } | |
968 | if (ipv6_saddr_preferred(score.addr_type) || | |
969 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
970 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
971 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
972 | score.rule = 3; | |
973 | goto record_it; | |
974 | } | |
975 | } else { | |
976 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
977 | continue; | |
978 | } | |
1da177e4 | 979 | |
3b9f9a1c NT |
980 | /* Rule 4: Prefer home address */ |
981 | #ifdef CONFIG_IPV6_MIP6 | |
982 | if (hiscore.rule < 4) { | |
983 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
984 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
985 | hiscore.rule++; | |
986 | } | |
987 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
988 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
989 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
990 | score.rule = 4; | |
991 | goto record_it; | |
992 | } | |
993 | } else { | |
994 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
995 | continue; | |
996 | } | |
997 | #else | |
220bbd74 YH |
998 | if (hiscore.rule < 4) |
999 | hiscore.rule++; | |
3b9f9a1c | 1000 | #endif |
072047e4 YH |
1001 | |
1002 | /* Rule 5: Prefer outgoing interface */ | |
1003 | if (hiscore.rule < 5) { | |
1004 | if (daddr_dev == NULL || | |
1005 | daddr_dev == ifa_result->idev->dev) | |
1006 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1007 | hiscore.rule++; | |
1008 | } | |
1009 | if (daddr_dev == NULL || | |
1010 | daddr_dev == ifa->idev->dev) { | |
1011 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1012 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1013 | score.rule = 5; | |
1014 | goto record_it; | |
1015 | } | |
1016 | } else { | |
1017 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1018 | continue; | |
1019 | } | |
1020 | ||
1021 | /* Rule 6: Prefer matching label */ | |
1022 | if (hiscore.rule < 6) { | |
1023 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1024 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1025 | hiscore.rule++; | |
1026 | } | |
1027 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1028 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1029 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1030 | score.rule = 6; | |
1031 | goto record_it; | |
1da177e4 | 1032 | } |
072047e4 YH |
1033 | } else { |
1034 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1035 | continue; | |
1036 | } | |
1037 | ||
44fd0261 | 1038 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1039 | /* Rule 7: Prefer public address |
1040 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1041 | */ | |
1042 | if (hiscore.rule < 7) { | |
1043 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1044 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1045 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1046 | hiscore.rule++; | |
1047 | } | |
1048 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1049 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1050 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1051 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1052 | score.rule = 7; | |
1053 | goto record_it; | |
1054 | } | |
1055 | } else { | |
1056 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1057 | continue; | |
1058 | } | |
5e2707fa YH |
1059 | #else |
1060 | if (hiscore.rule < 7) | |
1061 | hiscore.rule++; | |
44fd0261 | 1062 | #endif |
072047e4 | 1063 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1064 | if (hiscore.rule < 8) { |
072047e4 | 1065 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1066 | hiscore.rule++; |
1067 | } | |
072047e4 YH |
1068 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1069 | if (score.matchlen > hiscore.matchlen) { | |
1070 | score.rule = 8; | |
1071 | goto record_it; | |
1da177e4 | 1072 | } |
072047e4 YH |
1073 | #if 0 |
1074 | else if (score.matchlen < hiscore.matchlen) | |
1075 | continue; | |
1076 | #endif | |
1077 | ||
1078 | /* Final Rule: choose first available one */ | |
1079 | continue; | |
1080 | record_it: | |
1081 | if (ifa_result) | |
1082 | in6_ifa_put(ifa_result); | |
1083 | in6_ifa_hold(ifa); | |
1084 | ifa_result = ifa; | |
1085 | hiscore = score; | |
1da177e4 | 1086 | } |
072047e4 | 1087 | read_unlock_bh(&idev->lock); |
1da177e4 | 1088 | } |
8814c4b5 | 1089 | rcu_read_unlock(); |
1da177e4 LT |
1090 | read_unlock(&dev_base_lock); |
1091 | ||
072047e4 YH |
1092 | if (!ifa_result) |
1093 | return -EADDRNOTAVAIL; | |
1ab1457c | 1094 | |
072047e4 YH |
1095 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1096 | in6_ifa_put(ifa_result); | |
1097 | return 0; | |
1da177e4 LT |
1098 | } |
1099 | ||
1100 | ||
1101 | int ipv6_get_saddr(struct dst_entry *dst, | |
1102 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1103 | { | |
7a3025b1 | 1104 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | ||
1108 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1109 | { | |
1110 | struct inet6_dev *idev; | |
1111 | int err = -EADDRNOTAVAIL; | |
1112 | ||
8814c4b5 | 1113 | rcu_read_lock(); |
1da177e4 LT |
1114 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1115 | struct inet6_ifaddr *ifp; | |
1116 | ||
1117 | read_lock_bh(&idev->lock); | |
1118 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1119 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1120 | ipv6_addr_copy(addr, &ifp->addr); | |
1121 | err = 0; | |
1122 | break; | |
1123 | } | |
1124 | } | |
1125 | read_unlock_bh(&idev->lock); | |
1126 | } | |
8814c4b5 | 1127 | rcu_read_unlock(); |
1da177e4 LT |
1128 | return err; |
1129 | } | |
1130 | ||
1131 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1132 | { | |
1133 | int cnt = 0; | |
1134 | struct inet6_ifaddr *ifp; | |
1135 | ||
1136 | read_lock_bh(&idev->lock); | |
1137 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1138 | cnt++; | |
1139 | read_unlock_bh(&idev->lock); | |
1140 | return cnt; | |
1141 | } | |
1142 | ||
1143 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1144 | { | |
1145 | struct inet6_ifaddr * ifp; | |
1146 | u8 hash = ipv6_addr_hash(addr); | |
1147 | ||
1148 | read_lock_bh(&addrconf_hash_lock); | |
1149 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1150 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1151 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1152 | if (dev == NULL || ifp->idev->dev == dev || | |
1153 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1154 | break; | |
1155 | } | |
1156 | } | |
1157 | read_unlock_bh(&addrconf_hash_lock); | |
1158 | return ifp != NULL; | |
1159 | } | |
1160 | ||
1161 | static | |
1162 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1163 | { | |
1164 | struct inet6_ifaddr * ifp; | |
1165 | u8 hash = ipv6_addr_hash(addr); | |
1166 | ||
1167 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1168 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1169 | if (dev == NULL || ifp->idev->dev == dev) | |
1170 | break; | |
1171 | } | |
1172 | } | |
1173 | return ifp != NULL; | |
1174 | } | |
1175 | ||
1176 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1177 | { | |
1178 | struct inet6_ifaddr * ifp; | |
1179 | u8 hash = ipv6_addr_hash(addr); | |
1180 | ||
1181 | read_lock_bh(&addrconf_hash_lock); | |
1182 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1183 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1184 | if (dev == NULL || ifp->idev->dev == dev || | |
1185 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1186 | in6_ifa_hold(ifp); | |
1187 | break; | |
1188 | } | |
1189 | } | |
1190 | } | |
1191 | read_unlock_bh(&addrconf_hash_lock); | |
1192 | ||
1193 | return ifp; | |
1194 | } | |
1195 | ||
1196 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1197 | { | |
1198 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1199 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1200 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1201 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1202 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1203 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1204 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1205 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1206 | ||
1207 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1208 | return 1; | |
1209 | ||
1210 | if (addr_type2 == IPV6_ADDR_ANY && | |
1211 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1212 | return 1; | |
1213 | ||
1214 | if (addr_type == IPV6_ADDR_ANY && | |
1215 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1216 | return 1; | |
1217 | ||
1218 | if (sk2_rcv_saddr6 && | |
1219 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1220 | return 1; | |
1221 | ||
1222 | if (addr_type == IPV6_ADDR_MAPPED && | |
1223 | !sk2_ipv6only && | |
1224 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1225 | return 1; | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* Gets referenced address, destroys ifaddr */ | |
1231 | ||
9f5336e2 | 1232 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1233 | { |
1da177e4 LT |
1234 | if (ifp->flags&IFA_F_PERMANENT) { |
1235 | spin_lock_bh(&ifp->lock); | |
1236 | addrconf_del_timer(ifp); | |
1237 | ifp->flags |= IFA_F_TENTATIVE; | |
1238 | spin_unlock_bh(&ifp->lock); | |
1239 | in6_ifa_put(ifp); | |
1240 | #ifdef CONFIG_IPV6_PRIVACY | |
1241 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1242 | struct inet6_ifaddr *ifpub; | |
1243 | spin_lock_bh(&ifp->lock); | |
1244 | ifpub = ifp->ifpub; | |
1245 | if (ifpub) { | |
1246 | in6_ifa_hold(ifpub); | |
1247 | spin_unlock_bh(&ifp->lock); | |
1248 | ipv6_create_tempaddr(ifpub, ifp); | |
1249 | in6_ifa_put(ifpub); | |
1250 | } else { | |
1251 | spin_unlock_bh(&ifp->lock); | |
1252 | } | |
1253 | ipv6_del_addr(ifp); | |
1254 | #endif | |
1255 | } else | |
1256 | ipv6_del_addr(ifp); | |
1257 | } | |
1258 | ||
3c21edbd YH |
1259 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1260 | { | |
1261 | if (net_ratelimit()) | |
1262 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1263 | addrconf_dad_stop(ifp); | |
1264 | } | |
1da177e4 LT |
1265 | |
1266 | /* Join to solicited addr multicast group. */ | |
1267 | ||
1268 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1269 | { | |
1270 | struct in6_addr maddr; | |
1271 | ||
1272 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1273 | return; | |
1274 | ||
1275 | addrconf_addr_solict_mult(addr, &maddr); | |
1276 | ipv6_dev_mc_inc(dev, &maddr); | |
1277 | } | |
1278 | ||
1279 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1280 | { | |
1281 | struct in6_addr maddr; | |
1282 | ||
1283 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1284 | return; | |
1285 | ||
1286 | addrconf_addr_solict_mult(addr, &maddr); | |
1287 | __ipv6_dev_mc_dec(idev, &maddr); | |
1288 | } | |
1289 | ||
20380731 | 1290 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1291 | { |
1292 | struct in6_addr addr; | |
1293 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1294 | if (ipv6_addr_any(&addr)) | |
1295 | return; | |
1296 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1297 | } | |
1298 | ||
20380731 | 1299 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1300 | { |
1301 | struct in6_addr addr; | |
1302 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1303 | if (ipv6_addr_any(&addr)) | |
1304 | return; | |
1305 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1306 | } | |
1307 | ||
073a8e0e YH |
1308 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1309 | { | |
1310 | if (dev->addr_len != ETH_ALEN) | |
1311 | return -1; | |
1312 | memcpy(eui, dev->dev_addr, 3); | |
1313 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1314 | ||
1315 | /* | |
1316 | * The zSeries OSA network cards can be shared among various | |
1317 | * OS instances, but the OSA cards have only one MAC address. | |
1318 | * This leads to duplicate address conflicts in conjunction | |
1319 | * with IPv6 if more than one instance uses the same card. | |
1320 | * | |
1321 | * The driver for these cards can deliver a unique 16-bit | |
1322 | * identifier for each instance sharing the same card. It is | |
1323 | * placed instead of 0xFFFE in the interface identifier. The | |
1324 | * "u" bit of the interface identifier is not inverted in this | |
1325 | * case. Hence the resulting interface identifier has local | |
1326 | * scope according to RFC2373. | |
1327 | */ | |
1328 | if (dev->dev_id) { | |
1329 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1330 | eui[4] = dev->dev_id & 0xFF; | |
1331 | } else { | |
1332 | eui[3] = 0xFF; | |
1333 | eui[4] = 0xFE; | |
1334 | eui[0] ^= 2; | |
1335 | } | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1340 | { | |
1341 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1342 | if (dev->addr_len != ARCNET_ALEN) | |
1343 | return -1; | |
1344 | memset(eui, 0, 7); | |
1345 | eui[7] = *(u8*)dev->dev_addr; | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1350 | { | |
1351 | if (dev->addr_len != INFINIBAND_ALEN) | |
1352 | return -1; | |
1353 | memcpy(eui, dev->dev_addr + 12, 8); | |
1354 | eui[0] |= 2; | |
1355 | return 0; | |
1356 | } | |
1357 | ||
1da177e4 LT |
1358 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1359 | { | |
1360 | switch (dev->type) { | |
1361 | case ARPHRD_ETHER: | |
1362 | case ARPHRD_FDDI: | |
1363 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1364 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1365 | case ARPHRD_ARCNET: |
073a8e0e | 1366 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1367 | case ARPHRD_INFINIBAND: |
073a8e0e | 1368 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1369 | } |
1370 | return -1; | |
1371 | } | |
1372 | ||
1373 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1374 | { | |
1375 | int err = -1; | |
1376 | struct inet6_ifaddr *ifp; | |
1377 | ||
1378 | read_lock_bh(&idev->lock); | |
1379 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1380 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1381 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1382 | err = 0; | |
1383 | break; | |
1384 | } | |
1385 | } | |
1386 | read_unlock_bh(&idev->lock); | |
1387 | return err; | |
1388 | } | |
1389 | ||
1390 | #ifdef CONFIG_IPV6_PRIVACY | |
1391 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1392 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1393 | { | |
1da177e4 | 1394 | regen: |
955189ef | 1395 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1396 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1397 | |
1398 | /* | |
1399 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1400 | * check if generated address is not inappropriate | |
1401 | * | |
1402 | * - Reserved subnet anycast (RFC 2526) | |
1403 | * 11111101 11....11 1xxxxxxx | |
1404 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1405 | * 00-00-5E-FE-xx-xx-xx-xx | |
1406 | * - value 0 | |
1407 | * - XXX: already assigned to an address on the device | |
1408 | */ | |
1ab1457c | 1409 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1410 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1411 | (idev->rndid[7]&0x80)) | |
1412 | goto regen; | |
1413 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1414 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1415 | goto regen; | |
1416 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1417 | goto regen; | |
1418 | } | |
1419 | ||
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | static void ipv6_regen_rndid(unsigned long data) | |
1424 | { | |
1425 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1426 | unsigned long expires; | |
1427 | ||
8814c4b5 | 1428 | rcu_read_lock_bh(); |
1da177e4 LT |
1429 | write_lock_bh(&idev->lock); |
1430 | ||
1431 | if (idev->dead) | |
1432 | goto out; | |
1433 | ||
1434 | if (__ipv6_regen_rndid(idev) < 0) | |
1435 | goto out; | |
1ab1457c | 1436 | |
1da177e4 | 1437 | expires = jiffies + |
1ab1457c | 1438 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1439 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1440 | if (time_before(expires, jiffies)) { | |
1441 | printk(KERN_WARNING | |
1442 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1443 | idev->dev->name); | |
1444 | goto out; | |
1445 | } | |
1446 | ||
1447 | if (!mod_timer(&idev->regen_timer, expires)) | |
1448 | in6_dev_hold(idev); | |
1449 | ||
1450 | out: | |
1451 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1452 | rcu_read_unlock_bh(); |
1da177e4 LT |
1453 | in6_dev_put(idev); |
1454 | } | |
1455 | ||
1456 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1457 | int ret = 0; | |
1458 | ||
1459 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1460 | ret = __ipv6_regen_rndid(idev); | |
1461 | return ret; | |
1462 | } | |
1463 | #endif | |
1464 | ||
1465 | /* | |
1466 | * Add prefix route. | |
1467 | */ | |
1468 | ||
1469 | static void | |
1470 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1471 | unsigned long expires, u32 flags) |
1da177e4 | 1472 | { |
86872cb5 TG |
1473 | struct fib6_config cfg = { |
1474 | .fc_table = RT6_TABLE_PREFIX, | |
1475 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1476 | .fc_ifindex = dev->ifindex, | |
1477 | .fc_expires = expires, | |
1478 | .fc_dst_len = plen, | |
1479 | .fc_flags = RTF_UP | flags, | |
1480 | }; | |
1da177e4 | 1481 | |
86872cb5 | 1482 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1483 | |
1484 | /* Prevent useless cloning on PtP SIT. | |
1485 | This thing is done here expecting that the whole | |
1486 | class of non-broadcast devices need not cloning. | |
1487 | */ | |
0be669bb | 1488 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1489 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1490 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1491 | #endif |
1da177e4 | 1492 | |
86872cb5 | 1493 | ip6_route_add(&cfg); |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | /* Create "default" multicast route to the interface */ | |
1497 | ||
1498 | static void addrconf_add_mroute(struct net_device *dev) | |
1499 | { | |
86872cb5 TG |
1500 | struct fib6_config cfg = { |
1501 | .fc_table = RT6_TABLE_LOCAL, | |
1502 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1503 | .fc_ifindex = dev->ifindex, | |
1504 | .fc_dst_len = 8, | |
1505 | .fc_flags = RTF_UP, | |
1506 | }; | |
1507 | ||
1508 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1509 | ||
1510 | ip6_route_add(&cfg); | |
1da177e4 LT |
1511 | } |
1512 | ||
0be669bb | 1513 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1514 | static void sit_route_add(struct net_device *dev) |
1515 | { | |
86872cb5 TG |
1516 | struct fib6_config cfg = { |
1517 | .fc_table = RT6_TABLE_MAIN, | |
1518 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1519 | .fc_ifindex = dev->ifindex, | |
1520 | .fc_dst_len = 96, | |
1521 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1522 | }; | |
1da177e4 LT |
1523 | |
1524 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1525 | ip6_route_add(&cfg); |
1da177e4 | 1526 | } |
0be669bb | 1527 | #endif |
1da177e4 LT |
1528 | |
1529 | static void addrconf_add_lroute(struct net_device *dev) | |
1530 | { | |
1531 | struct in6_addr addr; | |
1532 | ||
1533 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1534 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1535 | } | |
1536 | ||
1537 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1538 | { | |
1539 | struct inet6_dev *idev; | |
1540 | ||
1541 | ASSERT_RTNL(); | |
1542 | ||
1543 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1544 | return NULL; | |
1545 | ||
1546 | /* Add default multicast route */ | |
1547 | addrconf_add_mroute(dev); | |
1548 | ||
1549 | /* Add link local route */ | |
1550 | addrconf_add_lroute(dev); | |
1551 | return idev; | |
1552 | } | |
1553 | ||
1554 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1555 | { | |
1556 | struct prefix_info *pinfo; | |
1557 | __u32 valid_lft; | |
1558 | __u32 prefered_lft; | |
1559 | int addr_type; | |
1560 | unsigned long rt_expires; | |
1561 | struct inet6_dev *in6_dev; | |
1562 | ||
1563 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1564 | |
1da177e4 LT |
1565 | if (len < sizeof(struct prefix_info)) { |
1566 | ADBG(("addrconf: prefix option too short\n")); | |
1567 | return; | |
1568 | } | |
1ab1457c | 1569 | |
1da177e4 LT |
1570 | /* |
1571 | * Validation checks ([ADDRCONF], page 19) | |
1572 | */ | |
1573 | ||
1574 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1575 | ||
1576 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1577 | return; | |
1578 | ||
1579 | valid_lft = ntohl(pinfo->valid); | |
1580 | prefered_lft = ntohl(pinfo->prefered); | |
1581 | ||
1582 | if (prefered_lft > valid_lft) { | |
1583 | if (net_ratelimit()) | |
1584 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1585 | return; | |
1586 | } | |
1587 | ||
1588 | in6_dev = in6_dev_get(dev); | |
1589 | ||
1590 | if (in6_dev == NULL) { | |
1591 | if (net_ratelimit()) | |
1592 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1593 | return; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * Two things going on here: | |
1598 | * 1) Add routes for on-link prefixes | |
1599 | * 2) Configure prefixes with the auto flag set | |
1600 | */ | |
1601 | ||
1602 | /* Avoid arithmetic overflow. Really, we could | |
1603 | save rt_expires in seconds, likely valid_lft, | |
1604 | but it would require division in fib gc, that it | |
1605 | not good. | |
1606 | */ | |
1607 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1608 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1609 | else |
3dd4bc68 YH |
1610 | rt_expires = valid_lft * HZ; |
1611 | ||
1612 | /* | |
1613 | * We convert this (in jiffies) to clock_t later. | |
1614 | * Avoid arithmetic overflow there as well. | |
1615 | * Overflow can happen only if HZ < USER_HZ. | |
1616 | */ | |
1617 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1618 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1619 | |
1620 | if (pinfo->onlink) { | |
1621 | struct rt6_info *rt; | |
1622 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1623 | ||
1624 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1625 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1626 | if (valid_lft == 0) { | |
e0a1ad73 | 1627 | ip6_del_rt(rt); |
1da177e4 LT |
1628 | rt = NULL; |
1629 | } else { | |
3dd4bc68 | 1630 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1631 | } |
1632 | } | |
1633 | } else if (valid_lft) { | |
1634 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1635 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1636 | } |
1637 | if (rt) | |
1638 | dst_release(&rt->u.dst); | |
1639 | } | |
1640 | ||
1641 | /* Try to figure out our local address for this prefix */ | |
1642 | ||
1643 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1644 | struct inet6_ifaddr * ifp; | |
1645 | struct in6_addr addr; | |
1646 | int create = 0, update_lft = 0; | |
1647 | ||
1648 | if (pinfo->prefix_len == 64) { | |
1649 | memcpy(&addr, &pinfo->prefix, 8); | |
1650 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1651 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1652 | in6_dev_put(in6_dev); | |
1653 | return; | |
1654 | } | |
1655 | goto ok; | |
1656 | } | |
1657 | if (net_ratelimit()) | |
1658 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1659 | pinfo->prefix_len); | |
1660 | in6_dev_put(in6_dev); | |
1661 | return; | |
1662 | ||
1663 | ok: | |
1664 | ||
1665 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1666 | ||
1667 | if (ifp == NULL && valid_lft) { | |
1668 | int max_addresses = in6_dev->cnf.max_addresses; | |
1669 | ||
1670 | /* Do not allow to create too much of autoconfigured | |
1671 | * addresses; this would be too easy way to crash kernel. | |
1672 | */ | |
1673 | if (!max_addresses || | |
1674 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1675 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1676 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1677 | ||
1678 | if (!ifp || IS_ERR(ifp)) { | |
1679 | in6_dev_put(in6_dev); | |
1680 | return; | |
1681 | } | |
1682 | ||
1683 | update_lft = create = 1; | |
1684 | ifp->cstamp = jiffies; | |
1685 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1686 | } | |
1687 | ||
1688 | if (ifp) { | |
1689 | int flags; | |
1690 | unsigned long now; | |
1691 | #ifdef CONFIG_IPV6_PRIVACY | |
1692 | struct inet6_ifaddr *ift; | |
1693 | #endif | |
1694 | u32 stored_lft; | |
1695 | ||
1696 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1697 | spin_lock(&ifp->lock); | |
1698 | now = jiffies; | |
1699 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1700 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1701 | else | |
1702 | stored_lft = 0; | |
1703 | if (!update_lft && stored_lft) { | |
1704 | if (valid_lft > MIN_VALID_LIFETIME || | |
1705 | valid_lft > stored_lft) | |
1706 | update_lft = 1; | |
1707 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1708 | /* valid_lft <= stored_lft is always true */ | |
1709 | /* XXX: IPsec */ | |
1710 | update_lft = 0; | |
1711 | } else { | |
1712 | valid_lft = MIN_VALID_LIFETIME; | |
1713 | if (valid_lft < prefered_lft) | |
1714 | prefered_lft = valid_lft; | |
1715 | update_lft = 1; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | if (update_lft) { | |
1720 | ifp->valid_lft = valid_lft; | |
1721 | ifp->prefered_lft = prefered_lft; | |
1722 | ifp->tstamp = now; | |
1723 | flags = ifp->flags; | |
1724 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1725 | spin_unlock(&ifp->lock); | |
1726 | ||
1727 | if (!(flags&IFA_F_TENTATIVE)) | |
1728 | ipv6_ifa_notify(0, ifp); | |
1729 | } else | |
1730 | spin_unlock(&ifp->lock); | |
1731 | ||
1732 | #ifdef CONFIG_IPV6_PRIVACY | |
1733 | read_lock_bh(&in6_dev->lock); | |
1734 | /* update all temporary addresses in the list */ | |
1735 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1736 | /* | |
1737 | * When adjusting the lifetimes of an existing | |
1738 | * temporary address, only lower the lifetimes. | |
1739 | * Implementations must not increase the | |
1740 | * lifetimes of an existing temporary address | |
1741 | * when processing a Prefix Information Option. | |
1742 | */ | |
1743 | spin_lock(&ift->lock); | |
1744 | flags = ift->flags; | |
1745 | if (ift->valid_lft > valid_lft && | |
1746 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1747 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1748 | if (ift->prefered_lft > prefered_lft && | |
1749 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1750 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1751 | spin_unlock(&ift->lock); | |
1752 | if (!(flags&IFA_F_TENTATIVE)) | |
1753 | ipv6_ifa_notify(0, ift); | |
1754 | } | |
1755 | ||
1756 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1757 | /* | |
1758 | * When a new public address is created as described in [ADDRCONF], | |
1759 | * also create a new temporary address. | |
1760 | */ | |
1ab1457c | 1761 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1762 | ipv6_create_tempaddr(ifp, NULL); |
1763 | } else { | |
1764 | read_unlock_bh(&in6_dev->lock); | |
1765 | } | |
1766 | #endif | |
1767 | in6_ifa_put(ifp); | |
1768 | addrconf_verify(0); | |
1769 | } | |
1770 | } | |
1771 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1772 | in6_dev_put(in6_dev); | |
1773 | } | |
1774 | ||
1775 | /* | |
1776 | * Set destination address. | |
1777 | * Special case for SIT interfaces where we create a new "virtual" | |
1778 | * device. | |
1779 | */ | |
1780 | int addrconf_set_dstaddr(void __user *arg) | |
1781 | { | |
1782 | struct in6_ifreq ireq; | |
1783 | struct net_device *dev; | |
1784 | int err = -EINVAL; | |
1785 | ||
1786 | rtnl_lock(); | |
1787 | ||
1788 | err = -EFAULT; | |
1789 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1790 | goto err_exit; | |
1791 | ||
1792 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1793 | ||
1794 | err = -ENODEV; | |
1795 | if (dev == NULL) | |
1796 | goto err_exit; | |
1797 | ||
0be669bb | 1798 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1799 | if (dev->type == ARPHRD_SIT) { |
1800 | struct ifreq ifr; | |
1801 | mm_segment_t oldfs; | |
1802 | struct ip_tunnel_parm p; | |
1803 | ||
1804 | err = -EADDRNOTAVAIL; | |
1805 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1806 | goto err_exit; | |
1807 | ||
1808 | memset(&p, 0, sizeof(p)); | |
1809 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1810 | p.iph.saddr = 0; | |
1811 | p.iph.version = 4; | |
1812 | p.iph.ihl = 5; | |
1813 | p.iph.protocol = IPPROTO_IPV6; | |
1814 | p.iph.ttl = 64; | |
1815 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1816 | ||
1817 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1818 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1819 | set_fs(oldfs); | |
1820 | ||
1821 | if (err == 0) { | |
1822 | err = -ENOBUFS; | |
1823 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1824 | goto err_exit; | |
1825 | err = dev_open(dev); | |
1826 | } | |
1827 | } | |
0be669bb | 1828 | #endif |
1da177e4 LT |
1829 | |
1830 | err_exit: | |
1831 | rtnl_unlock(); | |
1832 | return err; | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * Manual configuration of address on an interface | |
1837 | */ | |
0778769d | 1838 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1839 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1840 | { |
1841 | struct inet6_ifaddr *ifp; | |
1842 | struct inet6_dev *idev; | |
1843 | struct net_device *dev; | |
1844 | int scope; | |
46d48046 | 1845 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1846 | |
1847 | ASSERT_RTNL(); | |
1ab1457c | 1848 | |
0778769d NT |
1849 | /* check the lifetime */ |
1850 | if (!valid_lft || prefered_lft > valid_lft) | |
1851 | return -EINVAL; | |
1852 | ||
1da177e4 LT |
1853 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1854 | return -ENODEV; | |
1ab1457c | 1855 | |
1da177e4 LT |
1856 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1857 | return -ENOBUFS; | |
1858 | ||
1859 | scope = ipv6_addr_scope(pfx); | |
1860 | ||
46d48046 | 1861 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1862 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1863 | flags = 0; |
1864 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1865 | valid_lft = 0x7FFFFFFF/HZ; |
1866 | ||
1867 | if (prefered_lft == 0) | |
1868 | ifa_flags |= IFA_F_DEPRECATED; | |
1869 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1870 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1871 | prefered_lft = 0x7FFFFFFF/HZ; | |
1872 | ||
1873 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1874 | ||
1da177e4 | 1875 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1876 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1877 | ifp->valid_lft = valid_lft; |
1878 | ifp->prefered_lft = prefered_lft; | |
1879 | ifp->tstamp = jiffies; | |
06aebfb7 | 1880 | spin_unlock_bh(&ifp->lock); |
0778769d | 1881 | |
46d48046 YH |
1882 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1883 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
1da177e4 LT |
1884 | addrconf_dad_start(ifp, 0); |
1885 | in6_ifa_put(ifp); | |
0778769d | 1886 | addrconf_verify(0); |
1da177e4 LT |
1887 | return 0; |
1888 | } | |
1889 | ||
1890 | return PTR_ERR(ifp); | |
1891 | } | |
1892 | ||
1893 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1894 | { | |
1895 | struct inet6_ifaddr *ifp; | |
1896 | struct inet6_dev *idev; | |
1897 | struct net_device *dev; | |
1ab1457c | 1898 | |
1da177e4 LT |
1899 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1900 | return -ENODEV; | |
1901 | ||
1902 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1903 | return -ENXIO; | |
1904 | ||
1905 | read_lock_bh(&idev->lock); | |
1906 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1907 | if (ifp->prefix_len == plen && | |
1908 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1909 | in6_ifa_hold(ifp); | |
1910 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1911 | |
1da177e4 LT |
1912 | ipv6_del_addr(ifp); |
1913 | ||
1914 | /* If the last address is deleted administratively, | |
1915 | disable IPv6 on this interface. | |
1916 | */ | |
1917 | if (idev->addr_list == NULL) | |
1918 | addrconf_ifdown(idev->dev, 1); | |
1919 | return 0; | |
1920 | } | |
1921 | } | |
1922 | read_unlock_bh(&idev->lock); | |
1923 | return -EADDRNOTAVAIL; | |
1924 | } | |
1925 | ||
1926 | ||
1927 | int addrconf_add_ifaddr(void __user *arg) | |
1928 | { | |
1929 | struct in6_ifreq ireq; | |
1930 | int err; | |
1ab1457c | 1931 | |
1da177e4 LT |
1932 | if (!capable(CAP_NET_ADMIN)) |
1933 | return -EPERM; | |
1ab1457c | 1934 | |
1da177e4 LT |
1935 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
1936 | return -EFAULT; | |
1937 | ||
1938 | rtnl_lock(); | |
0778769d | 1939 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 1940 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1941 | rtnl_unlock(); |
1942 | return err; | |
1943 | } | |
1944 | ||
1945 | int addrconf_del_ifaddr(void __user *arg) | |
1946 | { | |
1947 | struct in6_ifreq ireq; | |
1948 | int err; | |
1ab1457c | 1949 | |
1da177e4 LT |
1950 | if (!capable(CAP_NET_ADMIN)) |
1951 | return -EPERM; | |
1952 | ||
1953 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1954 | return -EFAULT; | |
1955 | ||
1956 | rtnl_lock(); | |
1957 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1958 | rtnl_unlock(); | |
1959 | return err; | |
1960 | } | |
1961 | ||
0be669bb | 1962 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1963 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
1964 | { | |
1965 | struct inet6_ifaddr * ifp; | |
1966 | struct in6_addr addr; | |
1967 | struct net_device *dev; | |
1968 | int scope; | |
1969 | ||
1970 | ASSERT_RTNL(); | |
1971 | ||
1972 | memset(&addr, 0, sizeof(struct in6_addr)); | |
1973 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
1974 | ||
1975 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
1976 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1977 | scope = IFA_LINK; | |
1978 | } else { | |
1979 | scope = IPV6_ADDR_COMPATv4; | |
1980 | } | |
1981 | ||
1982 | if (addr.s6_addr32[3]) { | |
1983 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
1984 | if (!IS_ERR(ifp)) { | |
1985 | spin_lock_bh(&ifp->lock); | |
1986 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1987 | spin_unlock_bh(&ifp->lock); | |
1988 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1989 | in6_ifa_put(ifp); | |
1990 | } | |
1991 | return; | |
1992 | } | |
1993 | ||
1ab1457c | 1994 | for (dev = dev_base; dev != NULL; dev = dev->next) { |
e5ed6399 | 1995 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1996 | if (in_dev && (dev->flags & IFF_UP)) { |
1997 | struct in_ifaddr * ifa; | |
1998 | ||
1999 | int flag = scope; | |
2000 | ||
2001 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2002 | int plen; | |
2003 | ||
2004 | addr.s6_addr32[3] = ifa->ifa_local; | |
2005 | ||
2006 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2007 | continue; | |
2008 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2009 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2010 | continue; | |
2011 | flag |= IFA_HOST; | |
2012 | } | |
2013 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2014 | plen = 64; | |
2015 | else | |
2016 | plen = 96; | |
2017 | ||
2018 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2019 | IFA_F_PERMANENT); | |
2020 | if (!IS_ERR(ifp)) { | |
2021 | spin_lock_bh(&ifp->lock); | |
2022 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2023 | spin_unlock_bh(&ifp->lock); | |
2024 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2025 | in6_ifa_put(ifp); | |
2026 | } | |
2027 | } | |
2028 | } | |
1ab1457c | 2029 | } |
1da177e4 | 2030 | } |
0be669bb | 2031 | #endif |
1da177e4 LT |
2032 | |
2033 | static void init_loopback(struct net_device *dev) | |
2034 | { | |
2035 | struct inet6_dev *idev; | |
2036 | struct inet6_ifaddr * ifp; | |
2037 | ||
2038 | /* ::1 */ | |
2039 | ||
2040 | ASSERT_RTNL(); | |
2041 | ||
2042 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2043 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2044 | return; | |
2045 | } | |
2046 | ||
2047 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2048 | if (!IS_ERR(ifp)) { | |
2049 | spin_lock_bh(&ifp->lock); | |
2050 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2051 | spin_unlock_bh(&ifp->lock); | |
2052 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2053 | in6_ifa_put(ifp); | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2058 | { | |
2059 | struct inet6_ifaddr * ifp; | |
2060 | ||
2061 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2062 | if (!IS_ERR(ifp)) { | |
46d48046 | 2063 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2064 | addrconf_dad_start(ifp, 0); |
2065 | in6_ifa_put(ifp); | |
2066 | } | |
2067 | } | |
2068 | ||
2069 | static void addrconf_dev_config(struct net_device *dev) | |
2070 | { | |
2071 | struct in6_addr addr; | |
2072 | struct inet6_dev * idev; | |
2073 | ||
2074 | ASSERT_RTNL(); | |
2075 | ||
1ab1457c | 2076 | if ((dev->type != ARPHRD_ETHER) && |
1da177e4 LT |
2077 | (dev->type != ARPHRD_FDDI) && |
2078 | (dev->type != ARPHRD_IEEE802_TR) && | |
2079 | (dev->type != ARPHRD_ARCNET) && | |
2080 | (dev->type != ARPHRD_INFINIBAND)) { | |
2081 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2082 | return; | |
2083 | } | |
2084 | ||
2085 | idev = addrconf_add_dev(dev); | |
2086 | if (idev == NULL) | |
2087 | return; | |
2088 | ||
2089 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2090 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2091 | ||
2092 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2093 | addrconf_add_linklocal(idev, &addr); | |
2094 | } | |
2095 | ||
0be669bb | 2096 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2097 | static void addrconf_sit_config(struct net_device *dev) |
2098 | { | |
2099 | struct inet6_dev *idev; | |
2100 | ||
2101 | ASSERT_RTNL(); | |
2102 | ||
1ab1457c YH |
2103 | /* |
2104 | * Configure the tunnel with one of our IPv4 | |
2105 | * addresses... we should configure all of | |
1da177e4 LT |
2106 | * our v4 addrs in the tunnel |
2107 | */ | |
2108 | ||
2109 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2110 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2111 | return; | |
2112 | } | |
2113 | ||
2114 | sit_add_v4_addrs(idev); | |
2115 | ||
2116 | if (dev->flags&IFF_POINTOPOINT) { | |
2117 | addrconf_add_mroute(dev); | |
2118 | addrconf_add_lroute(dev); | |
2119 | } else | |
2120 | sit_route_add(dev); | |
2121 | } | |
0be669bb | 2122 | #endif |
1da177e4 LT |
2123 | |
2124 | static inline int | |
2125 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2126 | { | |
2127 | struct in6_addr lladdr; | |
2128 | ||
2129 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2130 | addrconf_add_linklocal(idev, &lladdr); | |
2131 | return 0; | |
2132 | } | |
2133 | return -1; | |
2134 | } | |
2135 | ||
2136 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2137 | { | |
2138 | struct net_device *link_dev; | |
2139 | ||
2140 | /* first try to inherit the link-local address from the link device */ | |
2141 | if (idev->dev->iflink && | |
2142 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2143 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2144 | return; | |
2145 | } | |
2146 | /* then try to inherit it from any device */ | |
2147 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2148 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2149 | return; | |
2150 | } | |
2151 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2156 | * DHCPv6, MLD etc. can be run over the virtual link | |
2157 | */ | |
2158 | ||
2159 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2160 | { | |
2161 | struct inet6_dev *idev; | |
2162 | ||
2163 | ASSERT_RTNL(); | |
2164 | ||
2165 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2166 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2167 | return; | |
2168 | } | |
2169 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2170 | } |
2171 | ||
1ab1457c | 2172 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2173 | void * data) |
2174 | { | |
2175 | struct net_device *dev = (struct net_device *) data; | |
2176 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2177 | int run_pending = 0; |
1da177e4 LT |
2178 | |
2179 | switch(event) { | |
45ba9dd2 YH |
2180 | case NETDEV_REGISTER: |
2181 | if (!idev) { | |
2182 | idev = ipv6_add_dev(dev); | |
2183 | if (!idev) | |
2184 | printk(KERN_WARNING "IPv6: add_dev failed for %s\n", | |
2185 | dev->name); | |
2186 | } | |
2187 | break; | |
1da177e4 | 2188 | case NETDEV_UP: |
3c21edbd YH |
2189 | case NETDEV_CHANGE: |
2190 | if (event == NETDEV_UP) { | |
2191 | if (!netif_carrier_ok(dev)) { | |
2192 | /* device is not ready yet. */ | |
2193 | printk(KERN_INFO | |
2194 | "ADDRCONF(NETDEV_UP): %s: " | |
2195 | "link is not ready\n", | |
2196 | dev->name); | |
2197 | break; | |
2198 | } | |
99081049 KS |
2199 | |
2200 | if (idev) | |
2201 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2202 | } else { |
2203 | if (!netif_carrier_ok(dev)) { | |
2204 | /* device is still not ready. */ | |
2205 | break; | |
2206 | } | |
2207 | ||
2208 | if (idev) { | |
2209 | if (idev->if_flags & IF_READY) { | |
2210 | /* device is already configured. */ | |
2211 | break; | |
2212 | } | |
2213 | idev->if_flags |= IF_READY; | |
2214 | } | |
2215 | ||
2216 | printk(KERN_INFO | |
2217 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2218 | "link becomes ready\n", | |
2219 | dev->name); | |
2220 | ||
c5e33bdd | 2221 | run_pending = 1; |
3c21edbd YH |
2222 | } |
2223 | ||
1da177e4 | 2224 | switch(dev->type) { |
0be669bb | 2225 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2226 | case ARPHRD_SIT: |
2227 | addrconf_sit_config(dev); | |
2228 | break; | |
0be669bb | 2229 | #endif |
1da177e4 LT |
2230 | case ARPHRD_TUNNEL6: |
2231 | addrconf_ip6_tnl_config(dev); | |
2232 | break; | |
2233 | case ARPHRD_LOOPBACK: | |
2234 | init_loopback(dev); | |
2235 | break; | |
2236 | ||
2237 | default: | |
2238 | addrconf_dev_config(dev); | |
2239 | break; | |
2240 | }; | |
2241 | if (idev) { | |
c5e33bdd YH |
2242 | if (run_pending) |
2243 | addrconf_dad_run(idev); | |
2244 | ||
1da177e4 LT |
2245 | /* If the MTU changed during the interface down, when the |
2246 | interface up, the changed MTU must be reflected in the | |
2247 | idev as well as routers. | |
2248 | */ | |
2249 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2250 | rt6_mtu_change(dev, dev->mtu); | |
2251 | idev->cnf.mtu6 = dev->mtu; | |
2252 | } | |
2253 | idev->tstamp = jiffies; | |
2254 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2255 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2256 | stop IPv6 on this interface. | |
2257 | */ | |
2258 | if (dev->mtu < IPV6_MIN_MTU) | |
2259 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2260 | } | |
2261 | break; | |
2262 | ||
2263 | case NETDEV_CHANGEMTU: | |
2264 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2265 | rt6_mtu_change(dev, dev->mtu); | |
2266 | idev->cnf.mtu6 = dev->mtu; | |
2267 | break; | |
2268 | } | |
2269 | ||
2270 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2271 | ||
2272 | case NETDEV_DOWN: | |
2273 | case NETDEV_UNREGISTER: | |
2274 | /* | |
2275 | * Remove all addresses from this interface. | |
2276 | */ | |
2277 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2278 | break; | |
3c21edbd | 2279 | |
1da177e4 LT |
2280 | case NETDEV_CHANGENAME: |
2281 | #ifdef CONFIG_SYSCTL | |
2282 | if (idev) { | |
2283 | addrconf_sysctl_unregister(&idev->cnf); | |
2284 | neigh_sysctl_unregister(idev->nd_parms); | |
2285 | neigh_sysctl_register(dev, idev->nd_parms, | |
2286 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2287 | &ndisc_ifinfo_sysctl_change, | |
2288 | NULL); | |
2289 | addrconf_sysctl_register(idev, &idev->cnf); | |
2290 | } | |
2291 | #endif | |
2292 | break; | |
2293 | }; | |
2294 | ||
2295 | return NOTIFY_OK; | |
2296 | } | |
2297 | ||
2298 | /* | |
2299 | * addrconf module should be notified of a device going up | |
2300 | */ | |
2301 | static struct notifier_block ipv6_dev_notf = { | |
2302 | .notifier_call = addrconf_notify, | |
2303 | .priority = 0 | |
2304 | }; | |
2305 | ||
2306 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2307 | { | |
2308 | struct inet6_dev *idev; | |
2309 | struct inet6_ifaddr *ifa, **bifa; | |
2310 | int i; | |
2311 | ||
2312 | ASSERT_RTNL(); | |
2313 | ||
2314 | if (dev == &loopback_dev && how == 1) | |
2315 | how = 0; | |
2316 | ||
2317 | rt6_ifdown(dev); | |
2318 | neigh_ifdown(&nd_tbl, dev); | |
2319 | ||
2320 | idev = __in6_dev_get(dev); | |
2321 | if (idev == NULL) | |
2322 | return -ENODEV; | |
2323 | ||
2324 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2325 | Do not dev_put! |
1da177e4 LT |
2326 | */ |
2327 | if (how == 1) { | |
1da177e4 | 2328 | idev->dead = 1; |
8814c4b5 YH |
2329 | |
2330 | /* protected by rtnl_lock */ | |
2331 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2332 | |
2333 | /* Step 1.5: remove snmp6 entry */ | |
2334 | snmp6_unregister_dev(idev); | |
2335 | ||
2336 | } | |
2337 | ||
2338 | /* Step 2: clear hash table */ | |
2339 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2340 | bifa = &inet6_addr_lst[i]; | |
2341 | ||
2342 | write_lock_bh(&addrconf_hash_lock); | |
2343 | while ((ifa = *bifa) != NULL) { | |
2344 | if (ifa->idev == idev) { | |
2345 | *bifa = ifa->lst_next; | |
2346 | ifa->lst_next = NULL; | |
2347 | addrconf_del_timer(ifa); | |
2348 | in6_ifa_put(ifa); | |
2349 | continue; | |
2350 | } | |
2351 | bifa = &ifa->lst_next; | |
2352 | } | |
2353 | write_unlock_bh(&addrconf_hash_lock); | |
2354 | } | |
2355 | ||
2356 | write_lock_bh(&idev->lock); | |
2357 | ||
2358 | /* Step 3: clear flags for stateless addrconf */ | |
2359 | if (how != 1) | |
3c21edbd | 2360 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2361 | |
2362 | /* Step 4: clear address list */ | |
2363 | #ifdef CONFIG_IPV6_PRIVACY | |
2364 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2365 | in6_dev_put(idev); | |
2366 | ||
2367 | /* clear tempaddr list */ | |
2368 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2369 | idev->tempaddr_list = ifa->tmp_next; | |
2370 | ifa->tmp_next = NULL; | |
2371 | ifa->dead = 1; | |
2372 | write_unlock_bh(&idev->lock); | |
2373 | spin_lock_bh(&ifa->lock); | |
2374 | ||
2375 | if (ifa->ifpub) { | |
2376 | in6_ifa_put(ifa->ifpub); | |
2377 | ifa->ifpub = NULL; | |
2378 | } | |
2379 | spin_unlock_bh(&ifa->lock); | |
2380 | in6_ifa_put(ifa); | |
2381 | write_lock_bh(&idev->lock); | |
2382 | } | |
2383 | #endif | |
2384 | while ((ifa = idev->addr_list) != NULL) { | |
2385 | idev->addr_list = ifa->if_next; | |
2386 | ifa->if_next = NULL; | |
2387 | ifa->dead = 1; | |
2388 | addrconf_del_timer(ifa); | |
2389 | write_unlock_bh(&idev->lock); | |
2390 | ||
2391 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2392 | in6_ifa_put(ifa); | |
2393 | ||
2394 | write_lock_bh(&idev->lock); | |
2395 | } | |
2396 | write_unlock_bh(&idev->lock); | |
2397 | ||
2398 | /* Step 5: Discard multicast list */ | |
2399 | ||
2400 | if (how == 1) | |
2401 | ipv6_mc_destroy_dev(idev); | |
2402 | else | |
2403 | ipv6_mc_down(idev); | |
2404 | ||
2405 | /* Step 5: netlink notification of this interface */ | |
2406 | idev->tstamp = jiffies; | |
979ad663 | 2407 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2408 | |
1da177e4 LT |
2409 | /* Shot the device (if unregistered) */ |
2410 | ||
2411 | if (how == 1) { | |
2412 | #ifdef CONFIG_SYSCTL | |
2413 | addrconf_sysctl_unregister(&idev->cnf); | |
2414 | neigh_sysctl_unregister(idev->nd_parms); | |
2415 | #endif | |
2416 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2417 | neigh_ifdown(&nd_tbl, dev); | |
2418 | in6_dev_put(idev); | |
2419 | } | |
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | static void addrconf_rs_timer(unsigned long data) | |
2424 | { | |
2425 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2426 | ||
2427 | if (ifp->idev->cnf.forwarding) | |
2428 | goto out; | |
2429 | ||
2430 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2431 | /* | |
2432 | * Announcement received after solicitation | |
2433 | * was sent | |
2434 | */ | |
2435 | goto out; | |
2436 | } | |
2437 | ||
2438 | spin_lock(&ifp->lock); | |
2439 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2440 | struct in6_addr all_routers; | |
2441 | ||
2442 | /* The wait after the last probe can be shorter */ | |
2443 | addrconf_mod_timer(ifp, AC_RS, | |
2444 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2445 | ifp->idev->cnf.rtr_solicit_delay : | |
2446 | ifp->idev->cnf.rtr_solicit_interval); | |
2447 | spin_unlock(&ifp->lock); | |
2448 | ||
2449 | ipv6_addr_all_routers(&all_routers); | |
2450 | ||
2451 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2452 | } else { | |
2453 | spin_unlock(&ifp->lock); | |
2454 | /* | |
2455 | * Note: we do not support deprecated "all on-link" | |
2456 | * assumption any longer. | |
2457 | */ | |
2458 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2459 | ifp->idev->dev->name); | |
2460 | } | |
2461 | ||
2462 | out: | |
2463 | in6_ifa_put(ifp); | |
2464 | } | |
2465 | ||
2466 | /* | |
2467 | * Duplicate Address Detection | |
2468 | */ | |
3c21edbd YH |
2469 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2470 | { | |
2471 | unsigned long rand_num; | |
2472 | struct inet6_dev *idev = ifp->idev; | |
2473 | ||
2474 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2475 | ifp->probes = idev->cnf.dad_transmits; | |
2476 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2477 | } | |
2478 | ||
e431b8c0 | 2479 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2480 | { |
2481 | struct inet6_dev *idev = ifp->idev; | |
2482 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2483 | |
2484 | addrconf_join_solict(dev, &ifp->addr); | |
2485 | ||
1da177e4 | 2486 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2487 | |
2488 | read_lock_bh(&idev->lock); | |
2489 | if (ifp->dead) | |
2490 | goto out; | |
2491 | spin_lock_bh(&ifp->lock); | |
2492 | ||
2493 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2494 | !(ifp->flags&IFA_F_TENTATIVE) || |
2495 | ifp->flags & IFA_F_NODAD) { | |
1da177e4 LT |
2496 | ifp->flags &= ~IFA_F_TENTATIVE; |
2497 | spin_unlock_bh(&ifp->lock); | |
2498 | read_unlock_bh(&idev->lock); | |
2499 | ||
2500 | addrconf_dad_completed(ifp); | |
2501 | return; | |
2502 | } | |
2503 | ||
6732bade | 2504 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2505 | spin_unlock_bh(&ifp->lock); |
6732bade | 2506 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2507 | /* |
2508 | * If the defice is not ready: | |
2509 | * - keep it tentative if it is a permanent address. | |
2510 | * - otherwise, kill it. | |
2511 | */ | |
2512 | in6_ifa_hold(ifp); | |
2513 | addrconf_dad_stop(ifp); | |
6732bade | 2514 | return; |
3c21edbd | 2515 | } |
6732bade YH |
2516 | addrconf_dad_kick(ifp); |
2517 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2518 | out: |
2519 | read_unlock_bh(&idev->lock); | |
2520 | } | |
2521 | ||
2522 | static void addrconf_dad_timer(unsigned long data) | |
2523 | { | |
2524 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2525 | struct inet6_dev *idev = ifp->idev; | |
2526 | struct in6_addr unspec; | |
2527 | struct in6_addr mcaddr; | |
2528 | ||
2529 | read_lock_bh(&idev->lock); | |
2530 | if (idev->dead) { | |
2531 | read_unlock_bh(&idev->lock); | |
2532 | goto out; | |
2533 | } | |
2534 | spin_lock_bh(&ifp->lock); | |
2535 | if (ifp->probes == 0) { | |
2536 | /* | |
2537 | * DAD was successful | |
2538 | */ | |
2539 | ||
2540 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2541 | spin_unlock_bh(&ifp->lock); | |
2542 | read_unlock_bh(&idev->lock); | |
2543 | ||
2544 | addrconf_dad_completed(ifp); | |
2545 | ||
2546 | goto out; | |
2547 | } | |
2548 | ||
2549 | ifp->probes--; | |
2550 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2551 | spin_unlock_bh(&ifp->lock); | |
2552 | read_unlock_bh(&idev->lock); | |
2553 | ||
2554 | /* send a neighbour solicitation for our addr */ | |
2555 | memset(&unspec, 0, sizeof(unspec)); | |
2556 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2557 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2558 | out: | |
2559 | in6_ifa_put(ifp); | |
2560 | } | |
2561 | ||
2562 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2563 | { | |
2564 | struct net_device * dev = ifp->idev->dev; | |
2565 | ||
2566 | /* | |
2567 | * Configure the address for reception. Now it is valid. | |
2568 | */ | |
2569 | ||
2570 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2571 | ||
2572 | /* If added prefix is link local and forwarding is off, | |
2573 | start sending router solicitations. | |
2574 | */ | |
2575 | ||
2576 | if (ifp->idev->cnf.forwarding == 0 && | |
2577 | ifp->idev->cnf.rtr_solicits > 0 && | |
2578 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2579 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2580 | struct in6_addr all_routers; | |
2581 | ||
2582 | ipv6_addr_all_routers(&all_routers); | |
2583 | ||
2584 | /* | |
2585 | * If a host as already performed a random delay | |
2586 | * [...] as part of DAD [...] there is no need | |
2587 | * to delay again before sending the first RS | |
2588 | */ | |
2589 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2590 | ||
2591 | spin_lock_bh(&ifp->lock); | |
2592 | ifp->probes = 1; | |
2593 | ifp->idev->if_flags |= IF_RS_SENT; | |
2594 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2595 | spin_unlock_bh(&ifp->lock); | |
2596 | } | |
2597 | } | |
2598 | ||
c5e33bdd YH |
2599 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2600 | struct inet6_ifaddr *ifp; | |
2601 | ||
2602 | read_lock_bh(&idev->lock); | |
2603 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2604 | spin_lock_bh(&ifp->lock); | |
2605 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2606 | spin_unlock_bh(&ifp->lock); | |
2607 | continue; | |
2608 | } | |
2609 | spin_unlock_bh(&ifp->lock); | |
2610 | addrconf_dad_kick(ifp); | |
2611 | } | |
2612 | read_unlock_bh(&idev->lock); | |
2613 | } | |
2614 | ||
1da177e4 LT |
2615 | #ifdef CONFIG_PROC_FS |
2616 | struct if6_iter_state { | |
2617 | int bucket; | |
2618 | }; | |
2619 | ||
2620 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2621 | { | |
2622 | struct inet6_ifaddr *ifa = NULL; | |
2623 | struct if6_iter_state *state = seq->private; | |
2624 | ||
2625 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2626 | ifa = inet6_addr_lst[state->bucket]; | |
2627 | if (ifa) | |
2628 | break; | |
2629 | } | |
2630 | return ifa; | |
2631 | } | |
2632 | ||
2633 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2634 | { | |
2635 | struct if6_iter_state *state = seq->private; | |
2636 | ||
2637 | ifa = ifa->lst_next; | |
2638 | try_again: | |
2639 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2640 | ifa = inet6_addr_lst[state->bucket]; | |
2641 | goto try_again; | |
2642 | } | |
2643 | return ifa; | |
2644 | } | |
2645 | ||
2646 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2647 | { | |
2648 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2649 | ||
2650 | if (ifa) | |
2651 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2652 | --pos; | |
2653 | return pos ? NULL : ifa; | |
2654 | } | |
2655 | ||
2656 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2657 | { | |
2658 | read_lock_bh(&addrconf_hash_lock); | |
2659 | return if6_get_idx(seq, *pos); | |
2660 | } | |
2661 | ||
2662 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2663 | { | |
2664 | struct inet6_ifaddr *ifa; | |
2665 | ||
2666 | ifa = if6_get_next(seq, v); | |
2667 | ++*pos; | |
2668 | return ifa; | |
2669 | } | |
2670 | ||
2671 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2672 | { | |
2673 | read_unlock_bh(&addrconf_hash_lock); | |
2674 | } | |
2675 | ||
2676 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2677 | { | |
2678 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2679 | seq_printf(seq, | |
9343e79a | 2680 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2681 | NIP6(ifp->addr), |
2682 | ifp->idev->dev->ifindex, | |
2683 | ifp->prefix_len, | |
2684 | ifp->scope, | |
2685 | ifp->flags, | |
2686 | ifp->idev->dev->name); | |
2687 | return 0; | |
2688 | } | |
2689 | ||
2690 | static struct seq_operations if6_seq_ops = { | |
2691 | .start = if6_seq_start, | |
2692 | .next = if6_seq_next, | |
2693 | .show = if6_seq_show, | |
2694 | .stop = if6_seq_stop, | |
2695 | }; | |
2696 | ||
2697 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2698 | { | |
2699 | struct seq_file *seq; | |
2700 | int rc = -ENOMEM; | |
322f74a4 | 2701 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2702 | |
2703 | if (!s) | |
2704 | goto out; | |
1da177e4 LT |
2705 | |
2706 | rc = seq_open(file, &if6_seq_ops); | |
2707 | if (rc) | |
2708 | goto out_kfree; | |
2709 | ||
2710 | seq = file->private_data; | |
2711 | seq->private = s; | |
2712 | out: | |
2713 | return rc; | |
2714 | out_kfree: | |
2715 | kfree(s); | |
2716 | goto out; | |
2717 | } | |
2718 | ||
9a32144e | 2719 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2720 | .owner = THIS_MODULE, |
2721 | .open = if6_seq_open, | |
2722 | .read = seq_read, | |
2723 | .llseek = seq_lseek, | |
2724 | .release = seq_release_private, | |
2725 | }; | |
2726 | ||
2727 | int __init if6_proc_init(void) | |
2728 | { | |
2729 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2730 | return -ENOMEM; | |
2731 | return 0; | |
2732 | } | |
2733 | ||
2734 | void if6_proc_exit(void) | |
2735 | { | |
2736 | proc_net_remove("if_inet6"); | |
2737 | } | |
2738 | #endif /* CONFIG_PROC_FS */ | |
2739 | ||
3b9f9a1c NT |
2740 | #ifdef CONFIG_IPV6_MIP6 |
2741 | /* Check if address is a home address configured on any interface. */ | |
2742 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2743 | { | |
2744 | int ret = 0; | |
2745 | struct inet6_ifaddr * ifp; | |
2746 | u8 hash = ipv6_addr_hash(addr); | |
2747 | read_lock_bh(&addrconf_hash_lock); | |
2748 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2749 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2750 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2751 | ret = 1; | |
2752 | break; | |
2753 | } | |
2754 | } | |
2755 | read_unlock_bh(&addrconf_hash_lock); | |
2756 | return ret; | |
2757 | } | |
2758 | #endif | |
2759 | ||
1da177e4 LT |
2760 | /* |
2761 | * Periodic address status verification | |
2762 | */ | |
2763 | ||
2764 | static void addrconf_verify(unsigned long foo) | |
2765 | { | |
2766 | struct inet6_ifaddr *ifp; | |
2767 | unsigned long now, next; | |
2768 | int i; | |
2769 | ||
2770 | spin_lock_bh(&addrconf_verify_lock); | |
2771 | now = jiffies; | |
2772 | next = now + ADDR_CHECK_FREQUENCY; | |
2773 | ||
2774 | del_timer(&addr_chk_timer); | |
2775 | ||
2776 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2777 | ||
2778 | restart: | |
5d5780df | 2779 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2780 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2781 | unsigned long age; | |
2782 | #ifdef CONFIG_IPV6_PRIVACY | |
2783 | unsigned long regen_advance; | |
2784 | #endif | |
2785 | ||
2786 | if (ifp->flags & IFA_F_PERMANENT) | |
2787 | continue; | |
2788 | ||
2789 | spin_lock(&ifp->lock); | |
2790 | age = (now - ifp->tstamp) / HZ; | |
2791 | ||
2792 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2793 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2794 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2795 | ifp->idev->nd_parms->retrans_time / HZ; |
2796 | #endif | |
2797 | ||
8f27ebb9 YH |
2798 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2799 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2800 | spin_unlock(&ifp->lock); |
2801 | in6_ifa_hold(ifp); | |
5d5780df | 2802 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2803 | ipv6_del_addr(ifp); |
2804 | goto restart; | |
8f27ebb9 YH |
2805 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2806 | spin_unlock(&ifp->lock); | |
2807 | continue; | |
1da177e4 LT |
2808 | } else if (age >= ifp->prefered_lft) { |
2809 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2810 | int deprecate = 0; | |
2811 | ||
2812 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2813 | deprecate = 1; | |
2814 | ifp->flags |= IFA_F_DEPRECATED; | |
2815 | } | |
2816 | ||
2817 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2818 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2819 | ||
2820 | spin_unlock(&ifp->lock); | |
2821 | ||
2822 | if (deprecate) { | |
2823 | in6_ifa_hold(ifp); | |
5d5780df | 2824 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2825 | |
2826 | ipv6_ifa_notify(0, ifp); | |
2827 | in6_ifa_put(ifp); | |
2828 | goto restart; | |
2829 | } | |
2830 | #ifdef CONFIG_IPV6_PRIVACY | |
2831 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2832 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2833 | if (age >= ifp->prefered_lft - regen_advance) { | |
2834 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2835 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2836 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2837 | if (!ifp->regen_count && ifpub) { | |
2838 | ifp->regen_count++; | |
2839 | in6_ifa_hold(ifp); | |
2840 | in6_ifa_hold(ifpub); | |
2841 | spin_unlock(&ifp->lock); | |
5d5780df | 2842 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2843 | spin_lock(&ifpub->lock); |
2844 | ifpub->regen_count = 0; | |
2845 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2846 | ipv6_create_tempaddr(ifpub, ifp); |
2847 | in6_ifa_put(ifpub); | |
2848 | in6_ifa_put(ifp); | |
2849 | goto restart; | |
2850 | } | |
2851 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2852 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2853 | spin_unlock(&ifp->lock); | |
2854 | #endif | |
2855 | } else { | |
2856 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2857 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2858 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2859 | spin_unlock(&ifp->lock); | |
2860 | } | |
2861 | } | |
5d5780df | 2862 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2863 | } |
2864 | ||
2865 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2866 | add_timer(&addr_chk_timer); | |
2867 | spin_unlock_bh(&addrconf_verify_lock); | |
2868 | } | |
2869 | ||
461d8837 TG |
2870 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2871 | { | |
2872 | struct in6_addr *pfx = NULL; | |
2873 | ||
2874 | if (addr) | |
2875 | pfx = nla_data(addr); | |
2876 | ||
2877 | if (local) { | |
2878 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2879 | pfx = NULL; | |
2880 | else | |
2881 | pfx = nla_data(local); | |
2882 | } | |
2883 | ||
2884 | return pfx; | |
2885 | } | |
2886 | ||
2887 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2888 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2889 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2890 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2891 | }; | |
2892 | ||
1da177e4 LT |
2893 | static int |
2894 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2895 | { | |
b933f716 TG |
2896 | struct ifaddrmsg *ifm; |
2897 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2898 | struct in6_addr *pfx; |
b933f716 | 2899 | int err; |
1da177e4 | 2900 | |
b933f716 TG |
2901 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2902 | if (err < 0) | |
2903 | return err; | |
2904 | ||
2905 | ifm = nlmsg_data(nlh); | |
2906 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2907 | if (pfx == NULL) |
2908 | return -EINVAL; | |
2909 | ||
2910 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2911 | } | |
2912 | ||
55ebaef1 NT |
2913 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
2914 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 2915 | { |
46d48046 YH |
2916 | u32 flags = RTF_EXPIRES; |
2917 | ||
081bba5b NT |
2918 | if (!valid_lft || (prefered_lft > valid_lft)) |
2919 | return -EINVAL; | |
2920 | ||
46d48046 | 2921 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 2922 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
2923 | flags = 0; |
2924 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
2925 | valid_lft = 0x7FFFFFFF/HZ; |
2926 | ||
2927 | if (prefered_lft == 0) | |
55ebaef1 | 2928 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
2929 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
2930 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2931 | prefered_lft = 0x7FFFFFFF/HZ; | |
2932 | ||
2933 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 2934 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
2935 | ifp->tstamp = jiffies; |
2936 | ifp->valid_lft = valid_lft; | |
2937 | ifp->prefered_lft = prefered_lft; | |
2938 | ||
2939 | spin_unlock_bh(&ifp->lock); | |
2940 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2941 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 2942 | |
46d48046 YH |
2943 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
2944 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
2945 | addrconf_verify(0); |
2946 | ||
2947 | return 0; | |
2948 | } | |
2949 | ||
1da177e4 LT |
2950 | static int |
2951 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2952 | { | |
461d8837 TG |
2953 | struct ifaddrmsg *ifm; |
2954 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2955 | struct in6_addr *pfx; |
7198f8ce TG |
2956 | struct inet6_ifaddr *ifa; |
2957 | struct net_device *dev; | |
55ebaef1 NT |
2958 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
2959 | u8 ifa_flags; | |
461d8837 | 2960 | int err; |
1da177e4 | 2961 | |
461d8837 TG |
2962 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2963 | if (err < 0) | |
2964 | return err; | |
2965 | ||
2966 | ifm = nlmsg_data(nlh); | |
2967 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2968 | if (pfx == NULL) |
2969 | return -EINVAL; | |
2970 | ||
461d8837 | 2971 | if (tb[IFA_CACHEINFO]) { |
0778769d | 2972 | struct ifa_cacheinfo *ci; |
461d8837 TG |
2973 | |
2974 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 2975 | valid_lft = ci->ifa_valid; |
461d8837 TG |
2976 | preferred_lft = ci->ifa_prefered; |
2977 | } else { | |
2978 | preferred_lft = INFINITY_LIFE_TIME; | |
2979 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
2980 | } |
2981 | ||
7198f8ce TG |
2982 | dev = __dev_get_by_index(ifm->ifa_index); |
2983 | if (dev == NULL) | |
2984 | return -ENODEV; | |
2985 | ||
55ebaef1 | 2986 | /* We ignore other flags so far. */ |
3b9f9a1c | 2987 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 2988 | |
7198f8ce TG |
2989 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
2990 | if (ifa == NULL) { | |
2991 | /* | |
2992 | * It would be best to check for !NLM_F_CREATE here but | |
2993 | * userspace alreay relies on not having to provide this. | |
2994 | */ | |
2995 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 2996 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
2997 | } |
2998 | ||
7198f8ce TG |
2999 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3000 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3001 | err = -EEXIST; | |
3002 | else | |
55ebaef1 | 3003 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3004 | |
3005 | in6_ifa_put(ifa); | |
3006 | ||
3007 | return err; | |
1da177e4 LT |
3008 | } |
3009 | ||
101bb229 TG |
3010 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3011 | u8 scope, int ifindex) | |
3012 | { | |
3013 | struct ifaddrmsg *ifm; | |
3014 | ||
3015 | ifm = nlmsg_data(nlh); | |
3016 | ifm->ifa_family = AF_INET6; | |
3017 | ifm->ifa_prefixlen = prefixlen; | |
3018 | ifm->ifa_flags = flags; | |
3019 | ifm->ifa_scope = scope; | |
3020 | ifm->ifa_index = ifindex; | |
3021 | } | |
3022 | ||
85486af0 TG |
3023 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3024 | unsigned long tstamp, u32 preferred, u32 valid) | |
3025 | { | |
3026 | struct ifa_cacheinfo ci; | |
3027 | ||
3028 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3029 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3030 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3031 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3032 | ci.ifa_prefered = preferred; | |
3033 | ci.ifa_valid = valid; | |
3034 | ||
3035 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3036 | } | |
3037 | ||
101bb229 TG |
3038 | static inline int rt_scope(int ifa_scope) |
3039 | { | |
3040 | if (ifa_scope & IFA_HOST) | |
3041 | return RT_SCOPE_HOST; | |
3042 | else if (ifa_scope & IFA_LINK) | |
3043 | return RT_SCOPE_LINK; | |
3044 | else if (ifa_scope & IFA_SITE) | |
3045 | return RT_SCOPE_SITE; | |
3046 | else | |
3047 | return RT_SCOPE_UNIVERSE; | |
3048 | } | |
3049 | ||
0ab6803b TG |
3050 | static inline int inet6_ifaddr_msgsize(void) |
3051 | { | |
339bf98f TG |
3052 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3053 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3054 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3055 | } |
c5396a31 | 3056 | |
1da177e4 | 3057 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3058 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3059 | { |
1da177e4 | 3060 | struct nlmsghdr *nlh; |
85486af0 | 3061 | u32 preferred, valid; |
1da177e4 | 3062 | |
0ab6803b TG |
3063 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3064 | if (nlh == NULL) | |
26932566 | 3065 | return -EMSGSIZE; |
0ab6803b | 3066 | |
101bb229 TG |
3067 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3068 | ifa->idev->dev->ifindex); | |
3069 | ||
1da177e4 | 3070 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3071 | preferred = ifa->prefered_lft; |
3072 | valid = ifa->valid_lft; | |
3073 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3074 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3075 | preferred -= tval; |
3076 | if (valid != INFINITY_LIFE_TIME) | |
3077 | valid -= tval; | |
1da177e4 LT |
3078 | } |
3079 | } else { | |
85486af0 TG |
3080 | preferred = INFINITY_LIFE_TIME; |
3081 | valid = INFINITY_LIFE_TIME; | |
3082 | } | |
3083 | ||
0ab6803b | 3084 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3085 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3086 | nlmsg_cancel(skb, nlh); | |
3087 | return -EMSGSIZE; | |
3088 | } | |
1da177e4 | 3089 | |
0ab6803b | 3090 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3091 | } |
3092 | ||
3093 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3094 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3095 | { |
1da177e4 | 3096 | struct nlmsghdr *nlh; |
101bb229 TG |
3097 | u8 scope = RT_SCOPE_UNIVERSE; |
3098 | int ifindex = ifmca->idev->dev->ifindex; | |
3099 | ||
3100 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3101 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3102 | |
0ab6803b TG |
3103 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3104 | if (nlh == NULL) | |
26932566 | 3105 | return -EMSGSIZE; |
85486af0 | 3106 | |
0ab6803b TG |
3107 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3108 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3109 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3110 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3111 | nlmsg_cancel(skb, nlh); | |
3112 | return -EMSGSIZE; | |
3113 | } | |
85486af0 | 3114 | |
0ab6803b | 3115 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3116 | } |
3117 | ||
3118 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3119 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3120 | { |
1da177e4 | 3121 | struct nlmsghdr *nlh; |
101bb229 TG |
3122 | u8 scope = RT_SCOPE_UNIVERSE; |
3123 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3124 | ||
3125 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3126 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3127 | |
0ab6803b TG |
3128 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3129 | if (nlh == NULL) | |
26932566 | 3130 | return -EMSGSIZE; |
85486af0 | 3131 | |
0ab6803b TG |
3132 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3133 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3134 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3135 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3136 | nlmsg_cancel(skb, nlh); | |
3137 | return -EMSGSIZE; | |
3138 | } | |
1da177e4 | 3139 | |
0ab6803b | 3140 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3141 | } |
3142 | ||
3143 | enum addr_type_t | |
3144 | { | |
3145 | UNICAST_ADDR, | |
3146 | MULTICAST_ADDR, | |
3147 | ANYCAST_ADDR, | |
3148 | }; | |
3149 | ||
3150 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3151 | enum addr_type_t type) | |
3152 | { | |
3153 | int idx, ip_idx; | |
3154 | int s_idx, s_ip_idx; | |
3155 | int err = 1; | |
3156 | struct net_device *dev; | |
3157 | struct inet6_dev *idev = NULL; | |
3158 | struct inet6_ifaddr *ifa; | |
3159 | struct ifmcaddr6 *ifmca; | |
3160 | struct ifacaddr6 *ifaca; | |
3161 | ||
3162 | s_idx = cb->args[0]; | |
3163 | s_ip_idx = ip_idx = cb->args[1]; | |
3164 | read_lock(&dev_base_lock); | |
1ab1457c | 3165 | |
1da177e4 LT |
3166 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
3167 | if (idx < s_idx) | |
3168 | continue; | |
3169 | if (idx > s_idx) | |
3170 | s_ip_idx = 0; | |
3171 | ip_idx = 0; | |
3172 | if ((idev = in6_dev_get(dev)) == NULL) | |
3173 | continue; | |
3174 | read_lock_bh(&idev->lock); | |
3175 | switch (type) { | |
3176 | case UNICAST_ADDR: | |
ae9cda5d | 3177 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3178 | for (ifa = idev->addr_list; ifa; |
3179 | ifa = ifa->if_next, ip_idx++) { | |
3180 | if (ip_idx < s_ip_idx) | |
3181 | continue; | |
1ab1457c YH |
3182 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3183 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3184 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3185 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3186 | goto done; |
3187 | } | |
1da177e4 LT |
3188 | break; |
3189 | case MULTICAST_ADDR: | |
3190 | /* multicast address */ | |
1ab1457c | 3191 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3192 | ifmca = ifmca->next, ip_idx++) { |
3193 | if (ip_idx < s_ip_idx) | |
3194 | continue; | |
1ab1457c YH |
3195 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3196 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3197 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3198 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3199 | goto done; |
3200 | } | |
3201 | break; | |
3202 | case ANYCAST_ADDR: | |
3203 | /* anycast address */ | |
3204 | for (ifaca = idev->ac_list; ifaca; | |
3205 | ifaca = ifaca->aca_next, ip_idx++) { | |
3206 | if (ip_idx < s_ip_idx) | |
3207 | continue; | |
1ab1457c YH |
3208 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3209 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3210 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3211 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3212 | goto done; |
3213 | } | |
3214 | break; | |
3215 | default: | |
3216 | break; | |
3217 | } | |
3218 | read_unlock_bh(&idev->lock); | |
3219 | in6_dev_put(idev); | |
3220 | } | |
3221 | done: | |
3222 | if (err <= 0) { | |
3223 | read_unlock_bh(&idev->lock); | |
3224 | in6_dev_put(idev); | |
3225 | } | |
3226 | read_unlock(&dev_base_lock); | |
3227 | cb->args[0] = idx; | |
3228 | cb->args[1] = ip_idx; | |
3229 | return skb->len; | |
3230 | } | |
3231 | ||
3232 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3233 | { | |
3234 | enum addr_type_t type = UNICAST_ADDR; | |
3235 | return inet6_dump_addr(skb, cb, type); | |
3236 | } | |
3237 | ||
3238 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3239 | { | |
3240 | enum addr_type_t type = MULTICAST_ADDR; | |
3241 | return inet6_dump_addr(skb, cb, type); | |
3242 | } | |
3243 | ||
3244 | ||
3245 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3246 | { | |
3247 | enum addr_type_t type = ANYCAST_ADDR; | |
3248 | return inet6_dump_addr(skb, cb, type); | |
3249 | } | |
3250 | ||
1b29fc2c TG |
3251 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3252 | void *arg) | |
6c223828 | 3253 | { |
1b29fc2c TG |
3254 | struct ifaddrmsg *ifm; |
3255 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3256 | struct in6_addr *addr = NULL; |
3257 | struct net_device *dev = NULL; | |
3258 | struct inet6_ifaddr *ifa; | |
3259 | struct sk_buff *skb; | |
6c223828 NT |
3260 | int err; |
3261 | ||
1b29fc2c TG |
3262 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3263 | if (err < 0) | |
3264 | goto errout; | |
3265 | ||
3266 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3267 | if (addr == NULL) { | |
3268 | err = -EINVAL; | |
3269 | goto errout; | |
6c223828 | 3270 | } |
6c223828 | 3271 | |
1b29fc2c | 3272 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3273 | if (ifm->ifa_index) |
3274 | dev = __dev_get_by_index(ifm->ifa_index); | |
3275 | ||
1b29fc2c TG |
3276 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3277 | err = -EADDRNOTAVAIL; | |
3278 | goto errout; | |
3279 | } | |
6c223828 | 3280 | |
0ab6803b | 3281 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3282 | err = -ENOBUFS; |
1b29fc2c | 3283 | goto errout_ifa; |
6c223828 NT |
3284 | } |
3285 | ||
6c223828 NT |
3286 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3287 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3288 | if (err < 0) { |
3289 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3290 | WARN_ON(err == -EMSGSIZE); | |
3291 | kfree_skb(skb); | |
3292 | goto errout_ifa; | |
3293 | } | |
2942e900 | 3294 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3295 | errout_ifa: |
6c223828 | 3296 | in6_ifa_put(ifa); |
1b29fc2c | 3297 | errout: |
6c223828 | 3298 | return err; |
6c223828 NT |
3299 | } |
3300 | ||
1da177e4 LT |
3301 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3302 | { | |
3303 | struct sk_buff *skb; | |
5d620266 | 3304 | int err = -ENOBUFS; |
1da177e4 | 3305 | |
0ab6803b | 3306 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3307 | if (skb == NULL) |
3308 | goto errout; | |
3309 | ||
3310 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3311 | if (err < 0) { |
3312 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3313 | WARN_ON(err == -EMSGSIZE); | |
3314 | kfree_skb(skb); | |
3315 | goto errout; | |
3316 | } | |
5d620266 TG |
3317 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3318 | errout: | |
3319 | if (err < 0) | |
3320 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3321 | } |
3322 | ||
3323 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3324 | __s32 *array, int bytes) | |
3325 | { | |
04561c1f TG |
3326 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3327 | ||
1da177e4 LT |
3328 | memset(array, 0, bytes); |
3329 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3330 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3331 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3332 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3333 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3334 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3335 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3336 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3337 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3338 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3339 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3340 | #ifdef CONFIG_IPV6_PRIVACY | |
3341 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3342 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3343 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3344 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3345 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3346 | #endif | |
3347 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3348 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3349 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3350 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3351 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3352 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3353 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3354 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3355 | #endif | |
930d6ff2 | 3356 | #endif |
fbea49e1 | 3357 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
1da177e4 LT |
3358 | } |
3359 | ||
339bf98f TG |
3360 | static inline size_t inet6_if_nlmsg_size(void) |
3361 | { | |
3362 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3363 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3364 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3365 | + nla_total_size(4) /* IFLA_MTU */ | |
3366 | + nla_total_size(4) /* IFLA_LINK */ | |
3367 | + nla_total_size( /* IFLA_PROTINFO */ | |
3368 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3369 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3370 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3371 | ); | |
3372 | } | |
c5396a31 | 3373 | |
1ab1457c | 3374 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3375 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3376 | { |
04561c1f TG |
3377 | struct net_device *dev = idev->dev; |
3378 | struct nlattr *conf; | |
3379 | struct ifinfomsg *hdr; | |
3380 | struct nlmsghdr *nlh; | |
3381 | void *protoinfo; | |
3382 | struct ifla_cacheinfo ci; | |
3383 | ||
3384 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3385 | if (nlh == NULL) | |
26932566 | 3386 | return -EMSGSIZE; |
04561c1f TG |
3387 | |
3388 | hdr = nlmsg_data(nlh); | |
3389 | hdr->ifi_family = AF_INET6; | |
3390 | hdr->__ifi_pad = 0; | |
3391 | hdr->ifi_type = dev->type; | |
3392 | hdr->ifi_index = dev->ifindex; | |
3393 | hdr->ifi_flags = dev_get_flags(dev); | |
3394 | hdr->ifi_change = 0; | |
3395 | ||
3396 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3397 | |
3398 | if (dev->addr_len) | |
04561c1f | 3399 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3400 | |
04561c1f | 3401 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3402 | if (dev->ifindex != dev->iflink) |
04561c1f | 3403 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3404 | |
04561c1f TG |
3405 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3406 | if (protoinfo == NULL) | |
3407 | goto nla_put_failure; | |
1da177e4 | 3408 | |
04561c1f | 3409 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3410 | |
1da177e4 LT |
3411 | ci.max_reasm_len = IPV6_MAXPLEN; |
3412 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3413 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3414 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3415 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3416 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3417 | ||
3418 | conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); | |
3419 | if (conf == NULL) | |
3420 | goto nla_put_failure; | |
3421 | ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf)); | |
1da177e4 LT |
3422 | |
3423 | /* XXX - Statistics/MC not implemented */ | |
1da177e4 | 3424 | |
04561c1f TG |
3425 | nla_nest_end(skb, protoinfo); |
3426 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3427 | |
04561c1f | 3428 | nla_put_failure: |
26932566 PM |
3429 | nlmsg_cancel(skb, nlh); |
3430 | return -EMSGSIZE; | |
1da177e4 LT |
3431 | } |
3432 | ||
3433 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3434 | { | |
3435 | int idx, err; | |
3436 | int s_idx = cb->args[0]; | |
3437 | struct net_device *dev; | |
3438 | struct inet6_dev *idev; | |
3439 | ||
3440 | read_lock(&dev_base_lock); | |
3441 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3442 | if (idx < s_idx) | |
3443 | continue; | |
3444 | if ((idev = in6_dev_get(dev)) == NULL) | |
3445 | continue; | |
1ab1457c | 3446 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3447 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3448 | in6_dev_put(idev); |
3449 | if (err <= 0) | |
3450 | break; | |
3451 | } | |
3452 | read_unlock(&dev_base_lock); | |
3453 | cb->args[0] = idx; | |
3454 | ||
3455 | return skb->len; | |
3456 | } | |
3457 | ||
3458 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3459 | { | |
3460 | struct sk_buff *skb; | |
8d7a76c9 | 3461 | int err = -ENOBUFS; |
1ab1457c | 3462 | |
339bf98f | 3463 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3464 | if (skb == NULL) |
3465 | goto errout; | |
3466 | ||
3467 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3468 | if (err < 0) { |
3469 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3470 | WARN_ON(err == -EMSGSIZE); | |
3471 | kfree_skb(skb); | |
3472 | goto errout; | |
3473 | } | |
8d7a76c9 TG |
3474 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3475 | errout: | |
3476 | if (err < 0) | |
3477 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3478 | } |
3479 | ||
339bf98f TG |
3480 | static inline size_t inet6_prefix_nlmsg_size(void) |
3481 | { | |
3482 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3483 | + nla_total_size(sizeof(struct in6_addr)) | |
3484 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3485 | } | |
c5396a31 | 3486 | |
1da177e4 | 3487 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3488 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3489 | int event, unsigned int flags) | |
1da177e4 | 3490 | { |
6051e2f4 TG |
3491 | struct prefixmsg *pmsg; |
3492 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3493 | struct prefix_cacheinfo ci; |
3494 | ||
6051e2f4 TG |
3495 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3496 | if (nlh == NULL) | |
26932566 | 3497 | return -EMSGSIZE; |
6051e2f4 TG |
3498 | |
3499 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3500 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3501 | pmsg->prefix_pad1 = 0; |
3502 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3503 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3504 | pmsg->prefix_len = pinfo->prefix_len; | |
3505 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3506 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3507 | pmsg->prefix_flags = 0; |
3508 | if (pinfo->onlink) | |
3509 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3510 | if (pinfo->autoconf) | |
3511 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3512 | ||
6051e2f4 | 3513 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3514 | |
3515 | ci.preferred_time = ntohl(pinfo->prefered); | |
3516 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3517 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3518 | |
6051e2f4 | 3519 | return nlmsg_end(skb, nlh); |
1da177e4 | 3520 | |
6051e2f4 | 3521 | nla_put_failure: |
26932566 PM |
3522 | nlmsg_cancel(skb, nlh); |
3523 | return -EMSGSIZE; | |
1da177e4 LT |
3524 | } |
3525 | ||
1ab1457c | 3526 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3527 | struct prefix_info *pinfo) |
3528 | { | |
3529 | struct sk_buff *skb; | |
8c384bfa | 3530 | int err = -ENOBUFS; |
1da177e4 | 3531 | |
339bf98f | 3532 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3533 | if (skb == NULL) |
3534 | goto errout; | |
3535 | ||
3536 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3537 | if (err < 0) { |
3538 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3539 | WARN_ON(err == -EMSGSIZE); | |
3540 | kfree_skb(skb); | |
3541 | goto errout; | |
3542 | } | |
8c384bfa TG |
3543 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3544 | errout: | |
3545 | if (err < 0) | |
3546 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3547 | } |
3548 | ||
db46edc6 | 3549 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3550 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3551 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3552 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
6c223828 NT |
3553 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, |
3554 | .dumpit = inet6_dump_ifaddr, }, | |
1da177e4 LT |
3555 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
3556 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3557 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3558 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3559 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3560 | .dumpit = inet6_dump_fib, }, | |
8423a9aa | 3561 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
101367c2 | 3562 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, |
8423a9aa | 3563 | #endif |
1da177e4 LT |
3564 | }; |
3565 | ||
3566 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3567 | { | |
3568 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3569 | ||
3570 | switch (event) { | |
3571 | case RTM_NEWADDR: | |
40e22e8f | 3572 | ip6_ins_rt(ifp->rt); |
1da177e4 LT |
3573 | if (ifp->idev->cnf.forwarding) |
3574 | addrconf_join_anycast(ifp); | |
3575 | break; | |
3576 | case RTM_DELADDR: | |
3577 | if (ifp->idev->cnf.forwarding) | |
3578 | addrconf_leave_anycast(ifp); | |
3579 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3580 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3581 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3582 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3583 | break; |
3584 | } | |
3585 | } | |
3586 | ||
3587 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3588 | { | |
8814c4b5 | 3589 | rcu_read_lock_bh(); |
1da177e4 LT |
3590 | if (likely(ifp->idev->dead == 0)) |
3591 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3592 | rcu_read_unlock_bh(); |
1da177e4 LT |
3593 | } |
3594 | ||
3595 | #ifdef CONFIG_SYSCTL | |
3596 | ||
3597 | static | |
3598 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3599 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3600 | { | |
3601 | int *valp = ctl->data; | |
3602 | int val = *valp; | |
3603 | int ret; | |
3604 | ||
3605 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3606 | ||
3607 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3608 | if (valp != &ipv6_devconf.forwarding) { | |
3609 | if ((!*valp) ^ (!val)) { | |
3610 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3611 | if (idev == NULL) | |
3612 | return ret; | |
3613 | dev_forward_change(idev); | |
3614 | } | |
3615 | } else { | |
3616 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3617 | addrconf_forward_change(); | |
3618 | } | |
3619 | if (*valp) | |
3620 | rt6_purge_dflt_routers(); | |
3621 | } | |
3622 | ||
1ab1457c | 3623 | return ret; |
1da177e4 LT |
3624 | } |
3625 | ||
1ab1457c | 3626 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3627 | int __user *name, int nlen, |
3628 | void __user *oldval, | |
3629 | size_t __user *oldlenp, | |
1f29bcd7 | 3630 | void __user *newval, size_t newlen) |
1da177e4 LT |
3631 | { |
3632 | int *valp = table->data; | |
3633 | int new; | |
3634 | ||
3635 | if (!newval || !newlen) | |
3636 | return 0; | |
3637 | if (newlen != sizeof(int)) | |
3638 | return -EINVAL; | |
3639 | if (get_user(new, (int __user *)newval)) | |
3640 | return -EFAULT; | |
3641 | if (new == *valp) | |
3642 | return 0; | |
3643 | if (oldval && oldlenp) { | |
3644 | size_t len; | |
3645 | if (get_user(len, oldlenp)) | |
3646 | return -EFAULT; | |
3647 | if (len) { | |
3648 | if (len > table->maxlen) | |
3649 | len = table->maxlen; | |
3650 | if (copy_to_user(oldval, valp, len)) | |
3651 | return -EFAULT; | |
3652 | if (put_user(len, oldlenp)) | |
3653 | return -EFAULT; | |
3654 | } | |
3655 | } | |
3656 | ||
3657 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3658 | if (valp != &ipv6_devconf.forwarding) { | |
3659 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3660 | int changed; | |
3661 | if (unlikely(idev == NULL)) | |
3662 | return -ENODEV; | |
3663 | changed = (!*valp) ^ (!new); | |
3664 | *valp = new; | |
3665 | if (changed) | |
3666 | dev_forward_change(idev); | |
3667 | } else { | |
3668 | *valp = new; | |
3669 | addrconf_forward_change(); | |
3670 | } | |
3671 | ||
3672 | if (*valp) | |
3673 | rt6_purge_dflt_routers(); | |
3674 | } else | |
3675 | *valp = new; | |
3676 | ||
3677 | return 1; | |
3678 | } | |
3679 | ||
3680 | static struct addrconf_sysctl_table | |
3681 | { | |
3682 | struct ctl_table_header *sysctl_header; | |
3683 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3684 | ctl_table addrconf_dev[2]; | |
3685 | ctl_table addrconf_conf_dir[2]; | |
3686 | ctl_table addrconf_proto_dir[2]; | |
3687 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3688 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3689 | .sysctl_header = NULL, |
3690 | .addrconf_vars = { | |
1ab1457c | 3691 | { |
1da177e4 LT |
3692 | .ctl_name = NET_IPV6_FORWARDING, |
3693 | .procname = "forwarding", | |
1ab1457c | 3694 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3695 | .maxlen = sizeof(int), |
3696 | .mode = 0644, | |
1ab1457c | 3697 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3698 | .strategy = &addrconf_sysctl_forward_strategy, |
3699 | }, | |
3700 | { | |
3701 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3702 | .procname = "hop_limit", | |
1ab1457c | 3703 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3704 | .maxlen = sizeof(int), |
3705 | .mode = 0644, | |
3706 | .proc_handler = proc_dointvec, | |
3707 | }, | |
3708 | { | |
3709 | .ctl_name = NET_IPV6_MTU, | |
3710 | .procname = "mtu", | |
3711 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3712 | .maxlen = sizeof(int), |
1da177e4 | 3713 | .mode = 0644, |
1ab1457c | 3714 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3715 | }, |
3716 | { | |
3717 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3718 | .procname = "accept_ra", | |
1ab1457c | 3719 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3720 | .maxlen = sizeof(int), |
3721 | .mode = 0644, | |
1ab1457c | 3722 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3723 | }, |
3724 | { | |
3725 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3726 | .procname = "accept_redirects", | |
1ab1457c | 3727 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3728 | .maxlen = sizeof(int), |
3729 | .mode = 0644, | |
1ab1457c | 3730 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3731 | }, |
3732 | { | |
3733 | .ctl_name = NET_IPV6_AUTOCONF, | |
3734 | .procname = "autoconf", | |
1ab1457c | 3735 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3736 | .maxlen = sizeof(int), |
3737 | .mode = 0644, | |
1ab1457c | 3738 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3739 | }, |
3740 | { | |
3741 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3742 | .procname = "dad_transmits", | |
1ab1457c | 3743 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3744 | .maxlen = sizeof(int), |
3745 | .mode = 0644, | |
1ab1457c | 3746 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3747 | }, |
3748 | { | |
3749 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3750 | .procname = "router_solicitations", | |
1ab1457c | 3751 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3752 | .maxlen = sizeof(int), |
3753 | .mode = 0644, | |
1ab1457c | 3754 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3755 | }, |
3756 | { | |
3757 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3758 | .procname = "router_solicitation_interval", | |
1ab1457c | 3759 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3760 | .maxlen = sizeof(int), |
3761 | .mode = 0644, | |
1ab1457c | 3762 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3763 | .strategy = &sysctl_jiffies, |
3764 | }, | |
3765 | { | |
3766 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3767 | .procname = "router_solicitation_delay", | |
1ab1457c | 3768 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3769 | .maxlen = sizeof(int), |
3770 | .mode = 0644, | |
1ab1457c | 3771 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3772 | .strategy = &sysctl_jiffies, |
3773 | }, | |
3774 | { | |
3775 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3776 | .procname = "force_mld_version", | |
1ab1457c | 3777 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3778 | .maxlen = sizeof(int), |
3779 | .mode = 0644, | |
1ab1457c | 3780 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3781 | }, |
3782 | #ifdef CONFIG_IPV6_PRIVACY | |
3783 | { | |
3784 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3785 | .procname = "use_tempaddr", | |
1ab1457c | 3786 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3787 | .maxlen = sizeof(int), |
3788 | .mode = 0644, | |
1ab1457c | 3789 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3790 | }, |
3791 | { | |
3792 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3793 | .procname = "temp_valid_lft", | |
1ab1457c | 3794 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3795 | .maxlen = sizeof(int), |
3796 | .mode = 0644, | |
1ab1457c | 3797 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3798 | }, |
3799 | { | |
3800 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3801 | .procname = "temp_prefered_lft", | |
1ab1457c | 3802 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3803 | .maxlen = sizeof(int), |
3804 | .mode = 0644, | |
1ab1457c | 3805 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3806 | }, |
3807 | { | |
3808 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3809 | .procname = "regen_max_retry", | |
1ab1457c | 3810 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3811 | .maxlen = sizeof(int), |
3812 | .mode = 0644, | |
1ab1457c | 3813 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3814 | }, |
3815 | { | |
3816 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3817 | .procname = "max_desync_factor", | |
1ab1457c | 3818 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3819 | .maxlen = sizeof(int), |
3820 | .mode = 0644, | |
1ab1457c | 3821 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3822 | }, |
3823 | #endif | |
3824 | { | |
3825 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3826 | .procname = "max_addresses", | |
3827 | .data = &ipv6_devconf.max_addresses, | |
3828 | .maxlen = sizeof(int), | |
3829 | .mode = 0644, | |
3830 | .proc_handler = &proc_dointvec, | |
3831 | }, | |
65f5c7c1 YH |
3832 | { |
3833 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3834 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3835 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3836 | .maxlen = sizeof(int), |
3837 | .mode = 0644, | |
1ab1457c | 3838 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3839 | }, |
c4fd30eb YH |
3840 | { |
3841 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3842 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3843 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3844 | .maxlen = sizeof(int), |
3845 | .mode = 0644, | |
1ab1457c | 3846 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3847 | }, |
930d6ff2 YH |
3848 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3849 | { | |
3850 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3851 | .procname = "accept_ra_rtr_pref", | |
3852 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3853 | .maxlen = sizeof(int), | |
3854 | .mode = 0644, | |
3855 | .proc_handler = &proc_dointvec, | |
3856 | }, | |
52e16356 YH |
3857 | { |
3858 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3859 | .procname = "router_probe_interval", | |
3860 | .data = &ipv6_devconf.rtr_probe_interval, | |
3861 | .maxlen = sizeof(int), | |
3862 | .mode = 0644, | |
3863 | .proc_handler = &proc_dointvec_jiffies, | |
3864 | .strategy = &sysctl_jiffies, | |
3865 | }, | |
fa03ef38 | 3866 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3867 | { |
3868 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3869 | .procname = "accept_ra_rt_info_max_plen", | |
3870 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3871 | .maxlen = sizeof(int), | |
3872 | .mode = 0644, | |
3873 | .proc_handler = &proc_dointvec, | |
3874 | }, | |
3875 | #endif | |
930d6ff2 | 3876 | #endif |
fbea49e1 YH |
3877 | { |
3878 | .ctl_name = NET_IPV6_PROXY_NDP, | |
3879 | .procname = "proxy_ndp", | |
3880 | .data = &ipv6_devconf.proxy_ndp, | |
3881 | .maxlen = sizeof(int), | |
3882 | .mode = 0644, | |
3883 | .proc_handler = &proc_dointvec, | |
3884 | }, | |
1da177e4 LT |
3885 | { |
3886 | .ctl_name = 0, /* sentinel */ | |
3887 | } | |
3888 | }, | |
3889 | .addrconf_dev = { | |
3890 | { | |
3891 | .ctl_name = NET_PROTO_CONF_ALL, | |
3892 | .procname = "all", | |
3893 | .mode = 0555, | |
3894 | .child = addrconf_sysctl.addrconf_vars, | |
3895 | }, | |
3896 | { | |
3897 | .ctl_name = 0, /* sentinel */ | |
3898 | } | |
3899 | }, | |
3900 | .addrconf_conf_dir = { | |
3901 | { | |
3902 | .ctl_name = NET_IPV6_CONF, | |
3903 | .procname = "conf", | |
3904 | .mode = 0555, | |
3905 | .child = addrconf_sysctl.addrconf_dev, | |
3906 | }, | |
3907 | { | |
3908 | .ctl_name = 0, /* sentinel */ | |
3909 | } | |
3910 | }, | |
3911 | .addrconf_proto_dir = { | |
3912 | { | |
3913 | .ctl_name = NET_IPV6, | |
3914 | .procname = "ipv6", | |
3915 | .mode = 0555, | |
3916 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3917 | }, | |
3918 | { | |
3919 | .ctl_name = 0, /* sentinel */ | |
3920 | } | |
3921 | }, | |
3922 | .addrconf_root_dir = { | |
3923 | { | |
3924 | .ctl_name = CTL_NET, | |
3925 | .procname = "net", | |
3926 | .mode = 0555, | |
3927 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3928 | }, | |
3929 | { | |
3930 | .ctl_name = 0, /* sentinel */ | |
3931 | } | |
3932 | }, | |
3933 | }; | |
3934 | ||
3935 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3936 | { | |
3937 | int i; | |
3938 | struct net_device *dev = idev ? idev->dev : NULL; | |
3939 | struct addrconf_sysctl_table *t; | |
3940 | char *dev_name = NULL; | |
3941 | ||
af879cc7 | 3942 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
3943 | if (t == NULL) |
3944 | return; | |
1da177e4 LT |
3945 | for (i=0; t->addrconf_vars[i].data; i++) { |
3946 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 LT |
3947 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
3948 | } | |
3949 | if (dev) { | |
1ab1457c | 3950 | dev_name = dev->name; |
1da177e4 LT |
3951 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
3952 | } else { | |
3953 | dev_name = "default"; | |
3954 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3955 | } | |
3956 | ||
1ab1457c YH |
3957 | /* |
3958 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
3959 | * by sysctl and we wouldn't want anyone to change it under our feet |
3960 | * (see SIOCSIFNAME). | |
1ab1457c | 3961 | */ |
543537bd | 3962 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3963 | if (!dev_name) |
3964 | goto free; | |
3965 | ||
3966 | t->addrconf_dev[0].procname = dev_name; | |
3967 | ||
3968 | t->addrconf_dev[0].child = t->addrconf_vars; | |
1da177e4 | 3969 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
1da177e4 | 3970 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
1da177e4 | 3971 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
1da177e4 | 3972 | |
0b4d4147 | 3973 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); |
1da177e4 LT |
3974 | if (t->sysctl_header == NULL) |
3975 | goto free_procname; | |
3976 | else | |
3977 | p->sysctl = t; | |
3978 | return; | |
3979 | ||
3980 | /* error path */ | |
3981 | free_procname: | |
3982 | kfree(dev_name); | |
3983 | free: | |
3984 | kfree(t); | |
3985 | ||
3986 | return; | |
3987 | } | |
3988 | ||
3989 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3990 | { | |
3991 | if (p->sysctl) { | |
3992 | struct addrconf_sysctl_table *t = p->sysctl; | |
3993 | p->sysctl = NULL; | |
3994 | unregister_sysctl_table(t->sysctl_header); | |
3995 | kfree(t->addrconf_dev[0].procname); | |
3996 | kfree(t); | |
3997 | } | |
3998 | } | |
3999 | ||
4000 | ||
4001 | #endif | |
4002 | ||
4003 | /* | |
4004 | * Device notifier | |
4005 | */ | |
4006 | ||
4007 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4008 | { | |
1ab1457c | 4009 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4010 | } |
4011 | ||
4012 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
4013 | { | |
1ab1457c | 4014 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4015 | } |
4016 | ||
4017 | /* | |
4018 | * Init / cleanup code | |
4019 | */ | |
4020 | ||
4021 | int __init addrconf_init(void) | |
4022 | { | |
4023 | int err = 0; | |
4024 | ||
4025 | /* The addrconf netdev notifier requires that loopback_dev | |
4026 | * has it's ipv6 private information allocated and setup | |
4027 | * before it can bring up and give link-local addresses | |
4028 | * to other devices which are up. | |
4029 | * | |
4030 | * Unfortunately, loopback_dev is not necessarily the first | |
4031 | * entry in the global dev_base list of net devices. In fact, | |
4032 | * it is likely to be the very last entry on that list. | |
4033 | * So this causes the notifier registry below to try and | |
4034 | * give link-local addresses to all devices besides loopback_dev | |
4035 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4036 | * devices to fail to get a link-local address. | |
4037 | * | |
4038 | * So, as a temporary fix, allocate the ipv6 structure for | |
4039 | * loopback_dev first by hand. | |
4040 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4041 | * device and it being up should be removed. | |
4042 | */ | |
4043 | rtnl_lock(); | |
4044 | if (!ipv6_add_dev(&loopback_dev)) | |
4045 | err = -ENOMEM; | |
4046 | rtnl_unlock(); | |
4047 | if (err) | |
4048 | return err; | |
4049 | ||
c62dba90 HX |
4050 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4051 | ||
1da177e4 LT |
4052 | register_netdevice_notifier(&ipv6_dev_notf); |
4053 | ||
1da177e4 LT |
4054 | addrconf_verify(0); |
4055 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4056 | #ifdef CONFIG_SYSCTL | |
4057 | addrconf_sysctl.sysctl_header = | |
0b4d4147 | 4058 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir); |
1da177e4 LT |
4059 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
4060 | #endif | |
4061 | ||
4062 | return 0; | |
4063 | } | |
4064 | ||
4065 | void __exit addrconf_cleanup(void) | |
4066 | { | |
1ab1457c YH |
4067 | struct net_device *dev; |
4068 | struct inet6_dev *idev; | |
4069 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
4070 | int i; |
4071 | ||
4072 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4073 | ||
4074 | rtnetlink_links[PF_INET6] = NULL; | |
4075 | #ifdef CONFIG_SYSCTL | |
4076 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4077 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4078 | #endif | |
4079 | ||
4080 | rtnl_lock(); | |
4081 | ||
4082 | /* | |
4083 | * clean dev list. | |
4084 | */ | |
4085 | ||
4086 | for (dev=dev_base; dev; dev=dev->next) { | |
4087 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4088 | continue; | |
4089 | addrconf_ifdown(dev, 1); | |
4090 | } | |
4091 | addrconf_ifdown(&loopback_dev, 2); | |
4092 | ||
4093 | /* | |
4094 | * Check hash table. | |
4095 | */ | |
4096 | ||
4097 | write_lock_bh(&addrconf_hash_lock); | |
4098 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4099 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4100 | struct inet6_ifaddr *bifa; | |
4101 | ||
4102 | bifa = ifa; | |
4103 | ifa = ifa->lst_next; | |
4104 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4105 | /* Do not free it; something is wrong. | |
4106 | Now we can investigate it with debugger. | |
4107 | */ | |
4108 | } | |
4109 | } | |
4110 | write_unlock_bh(&addrconf_hash_lock); | |
4111 | ||
4112 | del_timer(&addr_chk_timer); | |
4113 | ||
4114 | rtnl_unlock(); | |
4115 | ||
1da177e4 LT |
4116 | #ifdef CONFIG_PROC_FS |
4117 | proc_net_remove("if_inet6"); | |
4118 | #endif | |
4119 | } |