Commit | Line | Data |
---|---|---|
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 | ipv6_mc_init_dev(ndev); |
346 | ndev->tstamp = jiffies; | |
1da177e4 | 347 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
348 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
349 | NET_IPV6_NEIGH, "ipv6", | |
350 | &ndisc_ifinfo_sysctl_change, | |
351 | NULL); | |
352 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 353 | #endif |
30c4cf57 DS |
354 | /* protected by rtnl_lock */ |
355 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
356 | |
357 | /* Join all-node multicast group */ | |
358 | ipv6_addr_all_nodes(&maddr); | |
359 | ipv6_dev_mc_inc(dev, &maddr); | |
360 | ||
1da177e4 LT |
361 | return ndev; |
362 | } | |
363 | ||
364 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
365 | { | |
366 | struct inet6_dev *idev; | |
367 | ||
368 | ASSERT_RTNL(); | |
369 | ||
370 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
371 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
372 | return NULL; | |
373 | } | |
c5e33bdd | 374 | |
1da177e4 LT |
375 | if (dev->flags&IFF_UP) |
376 | ipv6_mc_up(idev); | |
377 | return idev; | |
378 | } | |
379 | ||
380 | #ifdef CONFIG_SYSCTL | |
381 | static void dev_forward_change(struct inet6_dev *idev) | |
382 | { | |
383 | struct net_device *dev; | |
384 | struct inet6_ifaddr *ifa; | |
385 | struct in6_addr addr; | |
386 | ||
387 | if (!idev) | |
388 | return; | |
389 | dev = idev->dev; | |
390 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
391 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 392 | |
1da177e4 LT |
393 | if (idev->cnf.forwarding) |
394 | ipv6_dev_mc_inc(dev, &addr); | |
395 | else | |
396 | ipv6_dev_mc_dec(dev, &addr); | |
397 | } | |
398 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
399 | if (ifa->flags&IFA_F_TENTATIVE) |
400 | continue; | |
1da177e4 LT |
401 | if (idev->cnf.forwarding) |
402 | addrconf_join_anycast(ifa); | |
403 | else | |
404 | addrconf_leave_anycast(ifa); | |
405 | } | |
406 | } | |
407 | ||
408 | ||
409 | static void addrconf_forward_change(void) | |
410 | { | |
411 | struct net_device *dev; | |
412 | struct inet6_dev *idev; | |
413 | ||
414 | read_lock(&dev_base_lock); | |
415 | for (dev=dev_base; dev; dev=dev->next) { | |
8814c4b5 | 416 | rcu_read_lock(); |
1da177e4 LT |
417 | idev = __in6_dev_get(dev); |
418 | if (idev) { | |
419 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
420 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
421 | if (changed) | |
422 | dev_forward_change(idev); | |
423 | } | |
8814c4b5 | 424 | rcu_read_unlock(); |
1da177e4 LT |
425 | } |
426 | read_unlock(&dev_base_lock); | |
427 | } | |
428 | #endif | |
429 | ||
430 | /* Nobody refers to this ifaddr, destroy it */ | |
431 | ||
432 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
433 | { | |
434 | BUG_TRAP(ifp->if_next==NULL); | |
435 | BUG_TRAP(ifp->lst_next==NULL); | |
436 | #ifdef NET_REFCNT_DEBUG | |
437 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
438 | #endif | |
439 | ||
440 | in6_dev_put(ifp->idev); | |
441 | ||
442 | if (del_timer(&ifp->timer)) | |
443 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
444 | ||
445 | if (!ifp->dead) { | |
446 | printk("Freeing alive inet6 address %p\n", ifp); | |
447 | return; | |
448 | } | |
449 | dst_release(&ifp->rt->u.dst); | |
450 | ||
451 | kfree(ifp); | |
452 | } | |
453 | ||
e55ffac6 BH |
454 | static void |
455 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
456 | { | |
457 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 458 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
459 | |
460 | /* | |
461 | * Each device address list is sorted in order of scope - | |
462 | * global before linklocal. | |
463 | */ | |
464 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
465 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 466 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
467 | break; |
468 | } | |
469 | ||
470 | ifp->if_next = *ifap; | |
471 | *ifap = ifp; | |
472 | } | |
473 | ||
1da177e4 LT |
474 | /* On success it returns ifp with increased reference count */ |
475 | ||
476 | static struct inet6_ifaddr * | |
477 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 478 | int scope, u32 flags) |
1da177e4 LT |
479 | { |
480 | struct inet6_ifaddr *ifa = NULL; | |
481 | struct rt6_info *rt; | |
482 | int hash; | |
483 | int err = 0; | |
484 | ||
8814c4b5 | 485 | rcu_read_lock_bh(); |
1da177e4 LT |
486 | if (idev->dead) { |
487 | err = -ENODEV; /*XXX*/ | |
488 | goto out2; | |
489 | } | |
490 | ||
491 | write_lock(&addrconf_hash_lock); | |
492 | ||
493 | /* Ignore adding duplicate addresses on an interface */ | |
494 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
495 | ADBG(("ipv6_add_addr: already assigned\n")); | |
496 | err = -EEXIST; | |
497 | goto out; | |
498 | } | |
499 | ||
322f74a4 | 500 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
501 | |
502 | if (ifa == NULL) { | |
503 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
504 | err = -ENOBUFS; | |
505 | goto out; | |
506 | } | |
507 | ||
508 | rt = addrconf_dst_alloc(idev, addr, 0); | |
509 | if (IS_ERR(rt)) { | |
510 | err = PTR_ERR(rt); | |
511 | goto out; | |
512 | } | |
513 | ||
1da177e4 LT |
514 | ipv6_addr_copy(&ifa->addr, addr); |
515 | ||
516 | spin_lock_init(&ifa->lock); | |
517 | init_timer(&ifa->timer); | |
518 | ifa->timer.data = (unsigned long) ifa; | |
519 | ifa->scope = scope; | |
520 | ifa->prefix_len = pfxlen; | |
521 | ifa->flags = flags | IFA_F_TENTATIVE; | |
522 | ifa->cstamp = ifa->tstamp = jiffies; | |
523 | ||
57f5f544 KF |
524 | ifa->rt = rt; |
525 | ||
1da177e4 LT |
526 | ifa->idev = idev; |
527 | in6_dev_hold(idev); | |
528 | /* For caller */ | |
529 | in6_ifa_hold(ifa); | |
530 | ||
531 | /* Add to big hash table */ | |
532 | hash = ipv6_addr_hash(addr); | |
533 | ||
534 | ifa->lst_next = inet6_addr_lst[hash]; | |
535 | inet6_addr_lst[hash] = ifa; | |
536 | in6_ifa_hold(ifa); | |
537 | write_unlock(&addrconf_hash_lock); | |
538 | ||
539 | write_lock(&idev->lock); | |
540 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 541 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
542 | |
543 | #ifdef CONFIG_IPV6_PRIVACY | |
544 | if (ifa->flags&IFA_F_TEMPORARY) { | |
545 | ifa->tmp_next = idev->tempaddr_list; | |
546 | idev->tempaddr_list = ifa; | |
547 | in6_ifa_hold(ifa); | |
548 | } | |
549 | #endif | |
550 | ||
1da177e4 LT |
551 | in6_ifa_hold(ifa); |
552 | write_unlock(&idev->lock); | |
553 | out2: | |
8814c4b5 | 554 | rcu_read_unlock_bh(); |
1da177e4 | 555 | |
fd92833a | 556 | if (likely(err == 0)) |
e041c683 | 557 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
558 | else { |
559 | kfree(ifa); | |
560 | ifa = ERR_PTR(err); | |
561 | } | |
562 | ||
563 | return ifa; | |
564 | out: | |
565 | write_unlock(&addrconf_hash_lock); | |
566 | goto out2; | |
567 | } | |
568 | ||
569 | /* This function wants to get referenced ifp and releases it before return */ | |
570 | ||
571 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
572 | { | |
573 | struct inet6_ifaddr *ifa, **ifap; | |
574 | struct inet6_dev *idev = ifp->idev; | |
575 | int hash; | |
576 | int deleted = 0, onlink = 0; | |
577 | unsigned long expires = jiffies; | |
578 | ||
579 | hash = ipv6_addr_hash(&ifp->addr); | |
580 | ||
581 | ifp->dead = 1; | |
582 | ||
583 | write_lock_bh(&addrconf_hash_lock); | |
584 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
585 | ifap = &ifa->lst_next) { | |
586 | if (ifa == ifp) { | |
587 | *ifap = ifa->lst_next; | |
588 | __in6_ifa_put(ifp); | |
589 | ifa->lst_next = NULL; | |
590 | break; | |
591 | } | |
592 | } | |
593 | write_unlock_bh(&addrconf_hash_lock); | |
594 | ||
595 | write_lock_bh(&idev->lock); | |
596 | #ifdef CONFIG_IPV6_PRIVACY | |
597 | if (ifp->flags&IFA_F_TEMPORARY) { | |
598 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
599 | ifap = &ifa->tmp_next) { | |
600 | if (ifa == ifp) { | |
601 | *ifap = ifa->tmp_next; | |
602 | if (ifp->ifpub) { | |
603 | in6_ifa_put(ifp->ifpub); | |
604 | ifp->ifpub = NULL; | |
605 | } | |
606 | __in6_ifa_put(ifp); | |
607 | ifa->tmp_next = NULL; | |
608 | break; | |
609 | } | |
610 | } | |
611 | } | |
612 | #endif | |
613 | ||
1d142804 | 614 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
615 | if (ifa == ifp) { |
616 | *ifap = ifa->if_next; | |
617 | __in6_ifa_put(ifp); | |
618 | ifa->if_next = NULL; | |
619 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
620 | break; | |
621 | deleted = 1; | |
1d142804 | 622 | continue; |
1da177e4 LT |
623 | } else if (ifp->flags & IFA_F_PERMANENT) { |
624 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
625 | ifp->prefix_len)) { | |
626 | if (ifa->flags & IFA_F_PERMANENT) { | |
627 | onlink = 1; | |
628 | if (deleted) | |
629 | break; | |
630 | } else { | |
631 | unsigned long lifetime; | |
632 | ||
633 | if (!onlink) | |
634 | onlink = -1; | |
635 | ||
636 | spin_lock(&ifa->lock); | |
637 | lifetime = min_t(unsigned long, | |
638 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
639 | if (time_before(expires, | |
640 | ifa->tstamp + lifetime * HZ)) | |
641 | expires = ifa->tstamp + lifetime * HZ; | |
642 | spin_unlock(&ifa->lock); | |
643 | } | |
644 | } | |
645 | } | |
1d142804 | 646 | ifap = &ifa->if_next; |
1da177e4 LT |
647 | } |
648 | write_unlock_bh(&idev->lock); | |
649 | ||
650 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
651 | ||
e041c683 | 652 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
653 | |
654 | addrconf_del_timer(ifp); | |
655 | ||
656 | /* | |
657 | * Purge or update corresponding prefix | |
658 | * | |
659 | * 1) we don't purge prefix here if address was not permanent. | |
660 | * prefix is managed by its own lifetime. | |
661 | * 2) if there're no addresses, delete prefix. | |
662 | * 3) if there're still other permanent address(es), | |
663 | * corresponding prefix is still permanent. | |
664 | * 4) otherwise, update prefix lifetime to the | |
665 | * longest valid lifetime among the corresponding | |
666 | * addresses on the device. | |
667 | * Note: subsequent RA will update lifetime. | |
668 | * | |
669 | * --yoshfuji | |
670 | */ | |
671 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
672 | struct in6_addr prefix; | |
673 | struct rt6_info *rt; | |
674 | ||
675 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
676 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
677 | ||
678 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
679 | if (onlink == 0) { | |
e0a1ad73 | 680 | ip6_del_rt(rt); |
1da177e4 LT |
681 | rt = NULL; |
682 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
683 | rt->rt6i_expires = expires; | |
684 | rt->rt6i_flags |= RTF_EXPIRES; | |
685 | } | |
686 | } | |
687 | dst_release(&rt->u.dst); | |
688 | } | |
689 | ||
690 | in6_ifa_put(ifp); | |
691 | } | |
692 | ||
693 | #ifdef CONFIG_IPV6_PRIVACY | |
694 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
695 | { | |
696 | struct inet6_dev *idev = ifp->idev; | |
697 | struct in6_addr addr, *tmpaddr; | |
698 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
699 | int tmp_plen; | |
700 | int ret = 0; | |
701 | int max_addresses; | |
702 | ||
703 | write_lock(&idev->lock); | |
704 | if (ift) { | |
705 | spin_lock_bh(&ift->lock); | |
706 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
707 | spin_unlock_bh(&ift->lock); | |
708 | tmpaddr = &addr; | |
709 | } else { | |
710 | tmpaddr = NULL; | |
711 | } | |
712 | retry: | |
713 | in6_dev_hold(idev); | |
714 | if (idev->cnf.use_tempaddr <= 0) { | |
715 | write_unlock(&idev->lock); | |
716 | printk(KERN_INFO | |
717 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
718 | in6_dev_put(idev); | |
719 | ret = -1; | |
720 | goto out; | |
721 | } | |
722 | spin_lock_bh(&ifp->lock); | |
723 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
724 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
725 | spin_unlock_bh(&ifp->lock); | |
726 | write_unlock(&idev->lock); | |
727 | printk(KERN_WARNING | |
728 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
729 | in6_dev_put(idev); | |
730 | ret = -1; | |
731 | goto out; | |
732 | } | |
733 | in6_ifa_hold(ifp); | |
734 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
735 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
736 | spin_unlock_bh(&ifp->lock); | |
737 | write_unlock(&idev->lock); | |
738 | printk(KERN_WARNING | |
739 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
740 | in6_ifa_put(ifp); | |
741 | in6_dev_put(idev); | |
742 | ret = -1; | |
743 | goto out; | |
744 | } | |
745 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
746 | tmp_valid_lft = min_t(__u32, | |
747 | ifp->valid_lft, | |
748 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
749 | tmp_prefered_lft = min_t(__u32, |
750 | ifp->prefered_lft, | |
1da177e4 LT |
751 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
752 | tmp_plen = ifp->prefix_len; | |
753 | max_addresses = idev->cnf.max_addresses; | |
754 | tmp_cstamp = ifp->cstamp; | |
755 | tmp_tstamp = ifp->tstamp; | |
756 | spin_unlock_bh(&ifp->lock); | |
757 | ||
758 | write_unlock(&idev->lock); | |
759 | ift = !max_addresses || | |
1ab1457c | 760 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 LT |
761 | ipv6_add_addr(idev, &addr, tmp_plen, |
762 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
763 | if (!ift || IS_ERR(ift)) { | |
764 | in6_ifa_put(ifp); | |
765 | in6_dev_put(idev); | |
766 | printk(KERN_INFO | |
767 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
768 | tmpaddr = &addr; | |
769 | write_lock(&idev->lock); | |
770 | goto retry; | |
771 | } | |
772 | ||
773 | spin_lock_bh(&ift->lock); | |
774 | ift->ifpub = ifp; | |
775 | ift->valid_lft = tmp_valid_lft; | |
776 | ift->prefered_lft = tmp_prefered_lft; | |
777 | ift->cstamp = tmp_cstamp; | |
778 | ift->tstamp = tmp_tstamp; | |
779 | spin_unlock_bh(&ift->lock); | |
780 | ||
781 | addrconf_dad_start(ift, 0); | |
782 | in6_ifa_put(ift); | |
783 | in6_dev_put(idev); | |
784 | out: | |
785 | return ret; | |
786 | } | |
787 | #endif | |
788 | ||
789 | /* | |
072047e4 | 790 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 791 | */ |
072047e4 YH |
792 | struct ipv6_saddr_score { |
793 | int addr_type; | |
794 | unsigned int attrs; | |
795 | int matchlen; | |
0d27b427 | 796 | int scope; |
072047e4 YH |
797 | unsigned int rule; |
798 | }; | |
799 | ||
800 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
801 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
802 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
803 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
804 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
805 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
806 | ||
807 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 808 | { |
072047e4 YH |
809 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
810 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
811 | return 1; | |
812 | return 0; | |
1da177e4 LT |
813 | } |
814 | ||
072047e4 YH |
815 | /* static matching label */ |
816 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
817 | { | |
818 | /* | |
819 | * prefix (longest match) label | |
820 | * ----------------------------- | |
821 | * ::1/128 0 | |
822 | * ::/0 1 | |
823 | * 2002::/16 2 | |
824 | * ::/96 3 | |
825 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
826 | * fc00::/7 5 |
827 | * 2001::/32 6 | |
072047e4 YH |
828 | */ |
829 | if (type & IPV6_ADDR_LOOPBACK) | |
830 | return 0; | |
831 | else if (type & IPV6_ADDR_COMPATv4) | |
832 | return 3; | |
833 | else if (type & IPV6_ADDR_MAPPED) | |
834 | return 4; | |
102128e3 ŁS |
835 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
836 | return 6; | |
072047e4 YH |
837 | else if (addr->s6_addr16[0] == htons(0x2002)) |
838 | return 2; | |
102128e3 ŁS |
839 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
840 | return 5; | |
072047e4 YH |
841 | return 1; |
842 | } | |
1da177e4 | 843 | |
072047e4 | 844 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
845 | struct in6_addr *daddr, struct in6_addr *saddr) |
846 | { | |
072047e4 YH |
847 | struct ipv6_saddr_score hiscore; |
848 | struct inet6_ifaddr *ifa_result = NULL; | |
849 | int daddr_type = __ipv6_addr_type(daddr); | |
850 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
851 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
852 | struct net_device *dev; | |
1da177e4 | 853 | |
072047e4 | 854 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 855 | |
072047e4 | 856 | read_lock(&dev_base_lock); |
8814c4b5 | 857 | rcu_read_lock(); |
1da177e4 | 858 | |
072047e4 YH |
859 | for (dev = dev_base; dev; dev=dev->next) { |
860 | struct inet6_dev *idev; | |
861 | struct inet6_ifaddr *ifa; | |
862 | ||
863 | /* Rule 0: Candidate Source Address (section 4) | |
864 | * - multicast and link-local destination address, | |
865 | * the set of candidate source address MUST only | |
866 | * include addresses assigned to interfaces | |
867 | * belonging to the same link as the outgoing | |
868 | * interface. | |
869 | * (- For site-local destination addresses, the | |
870 | * set of candidate source addresses MUST only | |
871 | * include addresses assigned to interfaces | |
872 | * belonging to the same site as the outgoing | |
873 | * interface.) | |
874 | */ | |
875 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
876 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
877 | daddr_dev && dev != daddr_dev) | |
878 | continue; | |
1da177e4 | 879 | |
1da177e4 | 880 | idev = __in6_dev_get(dev); |
072047e4 YH |
881 | if (!idev) |
882 | continue; | |
883 | ||
884 | read_lock_bh(&idev->lock); | |
885 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
886 | struct ipv6_saddr_score score; | |
887 | ||
888 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
889 | ||
6b3ae80a YH |
890 | /* Rule 0: |
891 | * - Tentative Address (RFC2462 section 5.4) | |
892 | * - A tentative address is not considered | |
893 | * "assigned to an interface" in the traditional | |
894 | * sense. | |
895 | * - Candidate Source Address (section 4) | |
072047e4 YH |
896 | * - In any case, anycast addresses, multicast |
897 | * addresses, and the unspecified address MUST | |
898 | * NOT be included in a candidate set. | |
899 | */ | |
6b3ae80a YH |
900 | if (ifa->flags & IFA_F_TENTATIVE) |
901 | continue; | |
072047e4 YH |
902 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
903 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
904 | LIMIT_NETDEBUG(KERN_DEBUG | |
905 | "ADDRCONF: unspecified / multicast address" | |
906 | "assigned as unicast address on %s", | |
907 | dev->name); | |
908 | continue; | |
909 | } | |
910 | ||
911 | score.attrs = 0; | |
912 | score.matchlen = 0; | |
913 | score.scope = 0; | |
914 | score.rule = 0; | |
915 | ||
916 | if (ifa_result == NULL) { | |
917 | /* record it if the first available entry */ | |
918 | goto record_it; | |
919 | } | |
920 | ||
921 | /* Rule 1: Prefer same address */ | |
922 | if (hiscore.rule < 1) { | |
923 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
924 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
925 | hiscore.rule++; | |
926 | } | |
927 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
928 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
929 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
930 | score.rule = 1; | |
931 | goto record_it; | |
1da177e4 | 932 | } |
072047e4 YH |
933 | } else { |
934 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
935 | continue; | |
1da177e4 | 936 | } |
1da177e4 | 937 | |
072047e4 YH |
938 | /* Rule 2: Prefer appropriate scope */ |
939 | if (hiscore.rule < 2) { | |
940 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
941 | hiscore.rule++; | |
942 | } | |
943 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
944 | if (hiscore.scope < score.scope) { | |
945 | if (hiscore.scope < daddr_scope) { | |
946 | score.rule = 2; | |
947 | goto record_it; | |
948 | } else | |
949 | continue; | |
950 | } else if (score.scope < hiscore.scope) { | |
951 | if (score.scope < daddr_scope) | |
e55ffac6 | 952 | break; /* addresses sorted by scope */ |
072047e4 YH |
953 | else { |
954 | score.rule = 2; | |
955 | goto record_it; | |
956 | } | |
957 | } | |
1da177e4 | 958 | |
072047e4 YH |
959 | /* Rule 3: Avoid deprecated address */ |
960 | if (hiscore.rule < 3) { | |
961 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
962 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
963 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
964 | hiscore.rule++; | |
965 | } | |
966 | if (ipv6_saddr_preferred(score.addr_type) || | |
967 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
968 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
969 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
970 | score.rule = 3; | |
971 | goto record_it; | |
972 | } | |
973 | } else { | |
974 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
975 | continue; | |
976 | } | |
1da177e4 | 977 | |
3b9f9a1c NT |
978 | /* Rule 4: Prefer home address */ |
979 | #ifdef CONFIG_IPV6_MIP6 | |
980 | if (hiscore.rule < 4) { | |
981 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
982 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
983 | hiscore.rule++; | |
984 | } | |
985 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
986 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
987 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
988 | score.rule = 4; | |
989 | goto record_it; | |
990 | } | |
991 | } else { | |
992 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
993 | continue; | |
994 | } | |
995 | #else | |
220bbd74 YH |
996 | if (hiscore.rule < 4) |
997 | hiscore.rule++; | |
3b9f9a1c | 998 | #endif |
072047e4 YH |
999 | |
1000 | /* Rule 5: Prefer outgoing interface */ | |
1001 | if (hiscore.rule < 5) { | |
1002 | if (daddr_dev == NULL || | |
1003 | daddr_dev == ifa_result->idev->dev) | |
1004 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1005 | hiscore.rule++; | |
1006 | } | |
1007 | if (daddr_dev == NULL || | |
1008 | daddr_dev == ifa->idev->dev) { | |
1009 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1010 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1011 | score.rule = 5; | |
1012 | goto record_it; | |
1013 | } | |
1014 | } else { | |
1015 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1016 | continue; | |
1017 | } | |
1018 | ||
1019 | /* Rule 6: Prefer matching label */ | |
1020 | if (hiscore.rule < 6) { | |
1021 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1022 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1023 | hiscore.rule++; | |
1024 | } | |
1025 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1026 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1027 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1028 | score.rule = 6; | |
1029 | goto record_it; | |
1da177e4 | 1030 | } |
072047e4 YH |
1031 | } else { |
1032 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1033 | continue; | |
1034 | } | |
1035 | ||
44fd0261 | 1036 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1037 | /* Rule 7: Prefer public address |
1038 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1039 | */ | |
1040 | if (hiscore.rule < 7) { | |
1041 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1042 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1043 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1044 | hiscore.rule++; | |
1045 | } | |
1046 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1047 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1048 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1049 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1050 | score.rule = 7; | |
1051 | goto record_it; | |
1052 | } | |
1053 | } else { | |
1054 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1055 | continue; | |
1056 | } | |
5e2707fa YH |
1057 | #else |
1058 | if (hiscore.rule < 7) | |
1059 | hiscore.rule++; | |
44fd0261 | 1060 | #endif |
072047e4 | 1061 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1062 | if (hiscore.rule < 8) { |
072047e4 | 1063 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1064 | hiscore.rule++; |
1065 | } | |
072047e4 YH |
1066 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1067 | if (score.matchlen > hiscore.matchlen) { | |
1068 | score.rule = 8; | |
1069 | goto record_it; | |
1da177e4 | 1070 | } |
072047e4 YH |
1071 | #if 0 |
1072 | else if (score.matchlen < hiscore.matchlen) | |
1073 | continue; | |
1074 | #endif | |
1075 | ||
1076 | /* Final Rule: choose first available one */ | |
1077 | continue; | |
1078 | record_it: | |
1079 | if (ifa_result) | |
1080 | in6_ifa_put(ifa_result); | |
1081 | in6_ifa_hold(ifa); | |
1082 | ifa_result = ifa; | |
1083 | hiscore = score; | |
1da177e4 | 1084 | } |
072047e4 | 1085 | read_unlock_bh(&idev->lock); |
1da177e4 | 1086 | } |
8814c4b5 | 1087 | rcu_read_unlock(); |
1da177e4 LT |
1088 | read_unlock(&dev_base_lock); |
1089 | ||
072047e4 YH |
1090 | if (!ifa_result) |
1091 | return -EADDRNOTAVAIL; | |
1ab1457c | 1092 | |
072047e4 YH |
1093 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1094 | in6_ifa_put(ifa_result); | |
1095 | return 0; | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | ||
1099 | int ipv6_get_saddr(struct dst_entry *dst, | |
1100 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1101 | { | |
7a3025b1 | 1102 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1103 | } |
1104 | ||
1105 | ||
1106 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1107 | { | |
1108 | struct inet6_dev *idev; | |
1109 | int err = -EADDRNOTAVAIL; | |
1110 | ||
8814c4b5 | 1111 | rcu_read_lock(); |
1da177e4 LT |
1112 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1113 | struct inet6_ifaddr *ifp; | |
1114 | ||
1115 | read_lock_bh(&idev->lock); | |
1116 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1117 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1118 | ipv6_addr_copy(addr, &ifp->addr); | |
1119 | err = 0; | |
1120 | break; | |
1121 | } | |
1122 | } | |
1123 | read_unlock_bh(&idev->lock); | |
1124 | } | |
8814c4b5 | 1125 | rcu_read_unlock(); |
1da177e4 LT |
1126 | return err; |
1127 | } | |
1128 | ||
1129 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1130 | { | |
1131 | int cnt = 0; | |
1132 | struct inet6_ifaddr *ifp; | |
1133 | ||
1134 | read_lock_bh(&idev->lock); | |
1135 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1136 | cnt++; | |
1137 | read_unlock_bh(&idev->lock); | |
1138 | return cnt; | |
1139 | } | |
1140 | ||
1141 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1142 | { | |
1143 | struct inet6_ifaddr * ifp; | |
1144 | u8 hash = ipv6_addr_hash(addr); | |
1145 | ||
1146 | read_lock_bh(&addrconf_hash_lock); | |
1147 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1148 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1149 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1150 | if (dev == NULL || ifp->idev->dev == dev || | |
1151 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1152 | break; | |
1153 | } | |
1154 | } | |
1155 | read_unlock_bh(&addrconf_hash_lock); | |
1156 | return ifp != NULL; | |
1157 | } | |
1158 | ||
1159 | static | |
1160 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1161 | { | |
1162 | struct inet6_ifaddr * ifp; | |
1163 | u8 hash = ipv6_addr_hash(addr); | |
1164 | ||
1165 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1166 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1167 | if (dev == NULL || ifp->idev->dev == dev) | |
1168 | break; | |
1169 | } | |
1170 | } | |
1171 | return ifp != NULL; | |
1172 | } | |
1173 | ||
1174 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1175 | { | |
1176 | struct inet6_ifaddr * ifp; | |
1177 | u8 hash = ipv6_addr_hash(addr); | |
1178 | ||
1179 | read_lock_bh(&addrconf_hash_lock); | |
1180 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1181 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1182 | if (dev == NULL || ifp->idev->dev == dev || | |
1183 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1184 | in6_ifa_hold(ifp); | |
1185 | break; | |
1186 | } | |
1187 | } | |
1188 | } | |
1189 | read_unlock_bh(&addrconf_hash_lock); | |
1190 | ||
1191 | return ifp; | |
1192 | } | |
1193 | ||
1194 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1195 | { | |
1196 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1197 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1198 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1199 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1200 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1201 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1202 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1203 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1204 | ||
1205 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1206 | return 1; | |
1207 | ||
1208 | if (addr_type2 == IPV6_ADDR_ANY && | |
1209 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1210 | return 1; | |
1211 | ||
1212 | if (addr_type == IPV6_ADDR_ANY && | |
1213 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1214 | return 1; | |
1215 | ||
1216 | if (sk2_rcv_saddr6 && | |
1217 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1218 | return 1; | |
1219 | ||
1220 | if (addr_type == IPV6_ADDR_MAPPED && | |
1221 | !sk2_ipv6only && | |
1222 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1223 | return 1; | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /* Gets referenced address, destroys ifaddr */ | |
1229 | ||
9f5336e2 | 1230 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1231 | { |
1da177e4 LT |
1232 | if (ifp->flags&IFA_F_PERMANENT) { |
1233 | spin_lock_bh(&ifp->lock); | |
1234 | addrconf_del_timer(ifp); | |
1235 | ifp->flags |= IFA_F_TENTATIVE; | |
1236 | spin_unlock_bh(&ifp->lock); | |
1237 | in6_ifa_put(ifp); | |
1238 | #ifdef CONFIG_IPV6_PRIVACY | |
1239 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1240 | struct inet6_ifaddr *ifpub; | |
1241 | spin_lock_bh(&ifp->lock); | |
1242 | ifpub = ifp->ifpub; | |
1243 | if (ifpub) { | |
1244 | in6_ifa_hold(ifpub); | |
1245 | spin_unlock_bh(&ifp->lock); | |
1246 | ipv6_create_tempaddr(ifpub, ifp); | |
1247 | in6_ifa_put(ifpub); | |
1248 | } else { | |
1249 | spin_unlock_bh(&ifp->lock); | |
1250 | } | |
1251 | ipv6_del_addr(ifp); | |
1252 | #endif | |
1253 | } else | |
1254 | ipv6_del_addr(ifp); | |
1255 | } | |
1256 | ||
3c21edbd YH |
1257 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1258 | { | |
1259 | if (net_ratelimit()) | |
1260 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1261 | addrconf_dad_stop(ifp); | |
1262 | } | |
1da177e4 LT |
1263 | |
1264 | /* Join to solicited addr multicast group. */ | |
1265 | ||
1266 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1267 | { | |
1268 | struct in6_addr maddr; | |
1269 | ||
1270 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1271 | return; | |
1272 | ||
1273 | addrconf_addr_solict_mult(addr, &maddr); | |
1274 | ipv6_dev_mc_inc(dev, &maddr); | |
1275 | } | |
1276 | ||
1277 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1278 | { | |
1279 | struct in6_addr maddr; | |
1280 | ||
1281 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1282 | return; | |
1283 | ||
1284 | addrconf_addr_solict_mult(addr, &maddr); | |
1285 | __ipv6_dev_mc_dec(idev, &maddr); | |
1286 | } | |
1287 | ||
20380731 | 1288 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1289 | { |
1290 | struct in6_addr addr; | |
1291 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1292 | if (ipv6_addr_any(&addr)) | |
1293 | return; | |
1294 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1295 | } | |
1296 | ||
20380731 | 1297 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1298 | { |
1299 | struct in6_addr addr; | |
1300 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1301 | if (ipv6_addr_any(&addr)) | |
1302 | return; | |
1303 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1304 | } | |
1305 | ||
073a8e0e YH |
1306 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1307 | { | |
1308 | if (dev->addr_len != ETH_ALEN) | |
1309 | return -1; | |
1310 | memcpy(eui, dev->dev_addr, 3); | |
1311 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1312 | ||
1313 | /* | |
1314 | * The zSeries OSA network cards can be shared among various | |
1315 | * OS instances, but the OSA cards have only one MAC address. | |
1316 | * This leads to duplicate address conflicts in conjunction | |
1317 | * with IPv6 if more than one instance uses the same card. | |
1318 | * | |
1319 | * The driver for these cards can deliver a unique 16-bit | |
1320 | * identifier for each instance sharing the same card. It is | |
1321 | * placed instead of 0xFFFE in the interface identifier. The | |
1322 | * "u" bit of the interface identifier is not inverted in this | |
1323 | * case. Hence the resulting interface identifier has local | |
1324 | * scope according to RFC2373. | |
1325 | */ | |
1326 | if (dev->dev_id) { | |
1327 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1328 | eui[4] = dev->dev_id & 0xFF; | |
1329 | } else { | |
1330 | eui[3] = 0xFF; | |
1331 | eui[4] = 0xFE; | |
1332 | eui[0] ^= 2; | |
1333 | } | |
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1338 | { | |
1339 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1340 | if (dev->addr_len != ARCNET_ALEN) | |
1341 | return -1; | |
1342 | memset(eui, 0, 7); | |
1343 | eui[7] = *(u8*)dev->dev_addr; | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1348 | { | |
1349 | if (dev->addr_len != INFINIBAND_ALEN) | |
1350 | return -1; | |
1351 | memcpy(eui, dev->dev_addr + 12, 8); | |
1352 | eui[0] |= 2; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1da177e4 LT |
1356 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1357 | { | |
1358 | switch (dev->type) { | |
1359 | case ARPHRD_ETHER: | |
1360 | case ARPHRD_FDDI: | |
1361 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1362 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1363 | case ARPHRD_ARCNET: |
073a8e0e | 1364 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1365 | case ARPHRD_INFINIBAND: |
073a8e0e | 1366 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1367 | } |
1368 | return -1; | |
1369 | } | |
1370 | ||
1371 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1372 | { | |
1373 | int err = -1; | |
1374 | struct inet6_ifaddr *ifp; | |
1375 | ||
1376 | read_lock_bh(&idev->lock); | |
1377 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1378 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1379 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1380 | err = 0; | |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | read_unlock_bh(&idev->lock); | |
1385 | return err; | |
1386 | } | |
1387 | ||
1388 | #ifdef CONFIG_IPV6_PRIVACY | |
1389 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1390 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1391 | { | |
1da177e4 | 1392 | regen: |
955189ef | 1393 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1394 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1395 | |
1396 | /* | |
1397 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1398 | * check if generated address is not inappropriate | |
1399 | * | |
1400 | * - Reserved subnet anycast (RFC 2526) | |
1401 | * 11111101 11....11 1xxxxxxx | |
1402 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1403 | * 00-00-5E-FE-xx-xx-xx-xx | |
1404 | * - value 0 | |
1405 | * - XXX: already assigned to an address on the device | |
1406 | */ | |
1ab1457c | 1407 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1408 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1409 | (idev->rndid[7]&0x80)) | |
1410 | goto regen; | |
1411 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1412 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1413 | goto regen; | |
1414 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1415 | goto regen; | |
1416 | } | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | static void ipv6_regen_rndid(unsigned long data) | |
1422 | { | |
1423 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1424 | unsigned long expires; | |
1425 | ||
8814c4b5 | 1426 | rcu_read_lock_bh(); |
1da177e4 LT |
1427 | write_lock_bh(&idev->lock); |
1428 | ||
1429 | if (idev->dead) | |
1430 | goto out; | |
1431 | ||
1432 | if (__ipv6_regen_rndid(idev) < 0) | |
1433 | goto out; | |
1ab1457c | 1434 | |
1da177e4 | 1435 | expires = jiffies + |
1ab1457c | 1436 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1437 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1438 | if (time_before(expires, jiffies)) { | |
1439 | printk(KERN_WARNING | |
1440 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1441 | idev->dev->name); | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | if (!mod_timer(&idev->regen_timer, expires)) | |
1446 | in6_dev_hold(idev); | |
1447 | ||
1448 | out: | |
1449 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1450 | rcu_read_unlock_bh(); |
1da177e4 LT |
1451 | in6_dev_put(idev); |
1452 | } | |
1453 | ||
1454 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1455 | int ret = 0; | |
1456 | ||
1457 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1458 | ret = __ipv6_regen_rndid(idev); | |
1459 | return ret; | |
1460 | } | |
1461 | #endif | |
1462 | ||
1463 | /* | |
1464 | * Add prefix route. | |
1465 | */ | |
1466 | ||
1467 | static void | |
1468 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1469 | unsigned long expires, u32 flags) |
1da177e4 | 1470 | { |
86872cb5 TG |
1471 | struct fib6_config cfg = { |
1472 | .fc_table = RT6_TABLE_PREFIX, | |
1473 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1474 | .fc_ifindex = dev->ifindex, | |
1475 | .fc_expires = expires, | |
1476 | .fc_dst_len = plen, | |
1477 | .fc_flags = RTF_UP | flags, | |
1478 | }; | |
1da177e4 | 1479 | |
86872cb5 | 1480 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1481 | |
1482 | /* Prevent useless cloning on PtP SIT. | |
1483 | This thing is done here expecting that the whole | |
1484 | class of non-broadcast devices need not cloning. | |
1485 | */ | |
0be669bb | 1486 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1487 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1488 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1489 | #endif |
1da177e4 | 1490 | |
86872cb5 | 1491 | ip6_route_add(&cfg); |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | /* Create "default" multicast route to the interface */ | |
1495 | ||
1496 | static void addrconf_add_mroute(struct net_device *dev) | |
1497 | { | |
86872cb5 TG |
1498 | struct fib6_config cfg = { |
1499 | .fc_table = RT6_TABLE_LOCAL, | |
1500 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1501 | .fc_ifindex = dev->ifindex, | |
1502 | .fc_dst_len = 8, | |
1503 | .fc_flags = RTF_UP, | |
1504 | }; | |
1505 | ||
1506 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1507 | ||
1508 | ip6_route_add(&cfg); | |
1da177e4 LT |
1509 | } |
1510 | ||
0be669bb | 1511 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1512 | static void sit_route_add(struct net_device *dev) |
1513 | { | |
86872cb5 TG |
1514 | struct fib6_config cfg = { |
1515 | .fc_table = RT6_TABLE_MAIN, | |
1516 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1517 | .fc_ifindex = dev->ifindex, | |
1518 | .fc_dst_len = 96, | |
1519 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1520 | }; | |
1da177e4 LT |
1521 | |
1522 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1523 | ip6_route_add(&cfg); |
1da177e4 | 1524 | } |
0be669bb | 1525 | #endif |
1da177e4 LT |
1526 | |
1527 | static void addrconf_add_lroute(struct net_device *dev) | |
1528 | { | |
1529 | struct in6_addr addr; | |
1530 | ||
1531 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1532 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1533 | } | |
1534 | ||
1535 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1536 | { | |
1537 | struct inet6_dev *idev; | |
1538 | ||
1539 | ASSERT_RTNL(); | |
1540 | ||
1541 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1542 | return NULL; | |
1543 | ||
1544 | /* Add default multicast route */ | |
1545 | addrconf_add_mroute(dev); | |
1546 | ||
1547 | /* Add link local route */ | |
1548 | addrconf_add_lroute(dev); | |
1549 | return idev; | |
1550 | } | |
1551 | ||
1552 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1553 | { | |
1554 | struct prefix_info *pinfo; | |
1555 | __u32 valid_lft; | |
1556 | __u32 prefered_lft; | |
1557 | int addr_type; | |
1558 | unsigned long rt_expires; | |
1559 | struct inet6_dev *in6_dev; | |
1560 | ||
1561 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1562 | |
1da177e4 LT |
1563 | if (len < sizeof(struct prefix_info)) { |
1564 | ADBG(("addrconf: prefix option too short\n")); | |
1565 | return; | |
1566 | } | |
1ab1457c | 1567 | |
1da177e4 LT |
1568 | /* |
1569 | * Validation checks ([ADDRCONF], page 19) | |
1570 | */ | |
1571 | ||
1572 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1573 | ||
1574 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1575 | return; | |
1576 | ||
1577 | valid_lft = ntohl(pinfo->valid); | |
1578 | prefered_lft = ntohl(pinfo->prefered); | |
1579 | ||
1580 | if (prefered_lft > valid_lft) { | |
1581 | if (net_ratelimit()) | |
1582 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1583 | return; | |
1584 | } | |
1585 | ||
1586 | in6_dev = in6_dev_get(dev); | |
1587 | ||
1588 | if (in6_dev == NULL) { | |
1589 | if (net_ratelimit()) | |
1590 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1591 | return; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Two things going on here: | |
1596 | * 1) Add routes for on-link prefixes | |
1597 | * 2) Configure prefixes with the auto flag set | |
1598 | */ | |
1599 | ||
1600 | /* Avoid arithmetic overflow. Really, we could | |
1601 | save rt_expires in seconds, likely valid_lft, | |
1602 | but it would require division in fib gc, that it | |
1603 | not good. | |
1604 | */ | |
1605 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1606 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1607 | else |
3dd4bc68 YH |
1608 | rt_expires = valid_lft * HZ; |
1609 | ||
1610 | /* | |
1611 | * We convert this (in jiffies) to clock_t later. | |
1612 | * Avoid arithmetic overflow there as well. | |
1613 | * Overflow can happen only if HZ < USER_HZ. | |
1614 | */ | |
1615 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1616 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1617 | |
1618 | if (pinfo->onlink) { | |
1619 | struct rt6_info *rt; | |
1620 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1621 | ||
1622 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1623 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1624 | if (valid_lft == 0) { | |
e0a1ad73 | 1625 | ip6_del_rt(rt); |
1da177e4 LT |
1626 | rt = NULL; |
1627 | } else { | |
3dd4bc68 | 1628 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1629 | } |
1630 | } | |
1631 | } else if (valid_lft) { | |
1632 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1633 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1634 | } |
1635 | if (rt) | |
1636 | dst_release(&rt->u.dst); | |
1637 | } | |
1638 | ||
1639 | /* Try to figure out our local address for this prefix */ | |
1640 | ||
1641 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1642 | struct inet6_ifaddr * ifp; | |
1643 | struct in6_addr addr; | |
1644 | int create = 0, update_lft = 0; | |
1645 | ||
1646 | if (pinfo->prefix_len == 64) { | |
1647 | memcpy(&addr, &pinfo->prefix, 8); | |
1648 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1649 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1650 | in6_dev_put(in6_dev); | |
1651 | return; | |
1652 | } | |
1653 | goto ok; | |
1654 | } | |
1655 | if (net_ratelimit()) | |
1656 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1657 | pinfo->prefix_len); | |
1658 | in6_dev_put(in6_dev); | |
1659 | return; | |
1660 | ||
1661 | ok: | |
1662 | ||
1663 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1664 | ||
1665 | if (ifp == NULL && valid_lft) { | |
1666 | int max_addresses = in6_dev->cnf.max_addresses; | |
1667 | ||
1668 | /* Do not allow to create too much of autoconfigured | |
1669 | * addresses; this would be too easy way to crash kernel. | |
1670 | */ | |
1671 | if (!max_addresses || | |
1672 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1673 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1674 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1675 | ||
1676 | if (!ifp || IS_ERR(ifp)) { | |
1677 | in6_dev_put(in6_dev); | |
1678 | return; | |
1679 | } | |
1680 | ||
1681 | update_lft = create = 1; | |
1682 | ifp->cstamp = jiffies; | |
1683 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1684 | } | |
1685 | ||
1686 | if (ifp) { | |
1687 | int flags; | |
1688 | unsigned long now; | |
1689 | #ifdef CONFIG_IPV6_PRIVACY | |
1690 | struct inet6_ifaddr *ift; | |
1691 | #endif | |
1692 | u32 stored_lft; | |
1693 | ||
1694 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1695 | spin_lock(&ifp->lock); | |
1696 | now = jiffies; | |
1697 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1698 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1699 | else | |
1700 | stored_lft = 0; | |
1701 | if (!update_lft && stored_lft) { | |
1702 | if (valid_lft > MIN_VALID_LIFETIME || | |
1703 | valid_lft > stored_lft) | |
1704 | update_lft = 1; | |
1705 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1706 | /* valid_lft <= stored_lft is always true */ | |
1707 | /* XXX: IPsec */ | |
1708 | update_lft = 0; | |
1709 | } else { | |
1710 | valid_lft = MIN_VALID_LIFETIME; | |
1711 | if (valid_lft < prefered_lft) | |
1712 | prefered_lft = valid_lft; | |
1713 | update_lft = 1; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | if (update_lft) { | |
1718 | ifp->valid_lft = valid_lft; | |
1719 | ifp->prefered_lft = prefered_lft; | |
1720 | ifp->tstamp = now; | |
1721 | flags = ifp->flags; | |
1722 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1723 | spin_unlock(&ifp->lock); | |
1724 | ||
1725 | if (!(flags&IFA_F_TENTATIVE)) | |
1726 | ipv6_ifa_notify(0, ifp); | |
1727 | } else | |
1728 | spin_unlock(&ifp->lock); | |
1729 | ||
1730 | #ifdef CONFIG_IPV6_PRIVACY | |
1731 | read_lock_bh(&in6_dev->lock); | |
1732 | /* update all temporary addresses in the list */ | |
1733 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1734 | /* | |
1735 | * When adjusting the lifetimes of an existing | |
1736 | * temporary address, only lower the lifetimes. | |
1737 | * Implementations must not increase the | |
1738 | * lifetimes of an existing temporary address | |
1739 | * when processing a Prefix Information Option. | |
1740 | */ | |
1741 | spin_lock(&ift->lock); | |
1742 | flags = ift->flags; | |
1743 | if (ift->valid_lft > valid_lft && | |
1744 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1745 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1746 | if (ift->prefered_lft > prefered_lft && | |
1747 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1748 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1749 | spin_unlock(&ift->lock); | |
1750 | if (!(flags&IFA_F_TENTATIVE)) | |
1751 | ipv6_ifa_notify(0, ift); | |
1752 | } | |
1753 | ||
1754 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1755 | /* | |
1756 | * When a new public address is created as described in [ADDRCONF], | |
1757 | * also create a new temporary address. | |
1758 | */ | |
1ab1457c | 1759 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1760 | ipv6_create_tempaddr(ifp, NULL); |
1761 | } else { | |
1762 | read_unlock_bh(&in6_dev->lock); | |
1763 | } | |
1764 | #endif | |
1765 | in6_ifa_put(ifp); | |
1766 | addrconf_verify(0); | |
1767 | } | |
1768 | } | |
1769 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1770 | in6_dev_put(in6_dev); | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * Set destination address. | |
1775 | * Special case for SIT interfaces where we create a new "virtual" | |
1776 | * device. | |
1777 | */ | |
1778 | int addrconf_set_dstaddr(void __user *arg) | |
1779 | { | |
1780 | struct in6_ifreq ireq; | |
1781 | struct net_device *dev; | |
1782 | int err = -EINVAL; | |
1783 | ||
1784 | rtnl_lock(); | |
1785 | ||
1786 | err = -EFAULT; | |
1787 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1788 | goto err_exit; | |
1789 | ||
1790 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1791 | ||
1792 | err = -ENODEV; | |
1793 | if (dev == NULL) | |
1794 | goto err_exit; | |
1795 | ||
0be669bb | 1796 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1797 | if (dev->type == ARPHRD_SIT) { |
1798 | struct ifreq ifr; | |
1799 | mm_segment_t oldfs; | |
1800 | struct ip_tunnel_parm p; | |
1801 | ||
1802 | err = -EADDRNOTAVAIL; | |
1803 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1804 | goto err_exit; | |
1805 | ||
1806 | memset(&p, 0, sizeof(p)); | |
1807 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1808 | p.iph.saddr = 0; | |
1809 | p.iph.version = 4; | |
1810 | p.iph.ihl = 5; | |
1811 | p.iph.protocol = IPPROTO_IPV6; | |
1812 | p.iph.ttl = 64; | |
1813 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1814 | ||
1815 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1816 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1817 | set_fs(oldfs); | |
1818 | ||
1819 | if (err == 0) { | |
1820 | err = -ENOBUFS; | |
1821 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1822 | goto err_exit; | |
1823 | err = dev_open(dev); | |
1824 | } | |
1825 | } | |
0be669bb | 1826 | #endif |
1da177e4 LT |
1827 | |
1828 | err_exit: | |
1829 | rtnl_unlock(); | |
1830 | return err; | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * Manual configuration of address on an interface | |
1835 | */ | |
0778769d | 1836 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1837 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1838 | { |
1839 | struct inet6_ifaddr *ifp; | |
1840 | struct inet6_dev *idev; | |
1841 | struct net_device *dev; | |
1842 | int scope; | |
46d48046 | 1843 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1844 | |
1845 | ASSERT_RTNL(); | |
1ab1457c | 1846 | |
0778769d NT |
1847 | /* check the lifetime */ |
1848 | if (!valid_lft || prefered_lft > valid_lft) | |
1849 | return -EINVAL; | |
1850 | ||
1da177e4 LT |
1851 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1852 | return -ENODEV; | |
1ab1457c | 1853 | |
1da177e4 LT |
1854 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1855 | return -ENOBUFS; | |
1856 | ||
1857 | scope = ipv6_addr_scope(pfx); | |
1858 | ||
46d48046 | 1859 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1860 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1861 | flags = 0; |
1862 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1863 | valid_lft = 0x7FFFFFFF/HZ; |
1864 | ||
1865 | if (prefered_lft == 0) | |
1866 | ifa_flags |= IFA_F_DEPRECATED; | |
1867 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1868 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1869 | prefered_lft = 0x7FFFFFFF/HZ; | |
1870 | ||
1871 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1872 | ||
1da177e4 | 1873 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1874 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1875 | ifp->valid_lft = valid_lft; |
1876 | ifp->prefered_lft = prefered_lft; | |
1877 | ifp->tstamp = jiffies; | |
06aebfb7 | 1878 | spin_unlock_bh(&ifp->lock); |
0778769d | 1879 | |
46d48046 YH |
1880 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1881 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
1da177e4 LT |
1882 | addrconf_dad_start(ifp, 0); |
1883 | in6_ifa_put(ifp); | |
0778769d | 1884 | addrconf_verify(0); |
1da177e4 LT |
1885 | return 0; |
1886 | } | |
1887 | ||
1888 | return PTR_ERR(ifp); | |
1889 | } | |
1890 | ||
1891 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1892 | { | |
1893 | struct inet6_ifaddr *ifp; | |
1894 | struct inet6_dev *idev; | |
1895 | struct net_device *dev; | |
1ab1457c | 1896 | |
1da177e4 LT |
1897 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1898 | return -ENODEV; | |
1899 | ||
1900 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1901 | return -ENXIO; | |
1902 | ||
1903 | read_lock_bh(&idev->lock); | |
1904 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1905 | if (ifp->prefix_len == plen && | |
1906 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1907 | in6_ifa_hold(ifp); | |
1908 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1909 | |
1da177e4 LT |
1910 | ipv6_del_addr(ifp); |
1911 | ||
1912 | /* If the last address is deleted administratively, | |
1913 | disable IPv6 on this interface. | |
1914 | */ | |
1915 | if (idev->addr_list == NULL) | |
1916 | addrconf_ifdown(idev->dev, 1); | |
1917 | return 0; | |
1918 | } | |
1919 | } | |
1920 | read_unlock_bh(&idev->lock); | |
1921 | return -EADDRNOTAVAIL; | |
1922 | } | |
1923 | ||
1924 | ||
1925 | int addrconf_add_ifaddr(void __user *arg) | |
1926 | { | |
1927 | struct in6_ifreq ireq; | |
1928 | int err; | |
1ab1457c | 1929 | |
1da177e4 LT |
1930 | if (!capable(CAP_NET_ADMIN)) |
1931 | return -EPERM; | |
1ab1457c | 1932 | |
1da177e4 LT |
1933 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
1934 | return -EFAULT; | |
1935 | ||
1936 | rtnl_lock(); | |
0778769d | 1937 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 1938 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1939 | rtnl_unlock(); |
1940 | return err; | |
1941 | } | |
1942 | ||
1943 | int addrconf_del_ifaddr(void __user *arg) | |
1944 | { | |
1945 | struct in6_ifreq ireq; | |
1946 | int err; | |
1ab1457c | 1947 | |
1da177e4 LT |
1948 | if (!capable(CAP_NET_ADMIN)) |
1949 | return -EPERM; | |
1950 | ||
1951 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1952 | return -EFAULT; | |
1953 | ||
1954 | rtnl_lock(); | |
1955 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1956 | rtnl_unlock(); | |
1957 | return err; | |
1958 | } | |
1959 | ||
0be669bb | 1960 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1961 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
1962 | { | |
1963 | struct inet6_ifaddr * ifp; | |
1964 | struct in6_addr addr; | |
1965 | struct net_device *dev; | |
1966 | int scope; | |
1967 | ||
1968 | ASSERT_RTNL(); | |
1969 | ||
1970 | memset(&addr, 0, sizeof(struct in6_addr)); | |
1971 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
1972 | ||
1973 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
1974 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1975 | scope = IFA_LINK; | |
1976 | } else { | |
1977 | scope = IPV6_ADDR_COMPATv4; | |
1978 | } | |
1979 | ||
1980 | if (addr.s6_addr32[3]) { | |
1981 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
1982 | if (!IS_ERR(ifp)) { | |
1983 | spin_lock_bh(&ifp->lock); | |
1984 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1985 | spin_unlock_bh(&ifp->lock); | |
1986 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1987 | in6_ifa_put(ifp); | |
1988 | } | |
1989 | return; | |
1990 | } | |
1991 | ||
1ab1457c | 1992 | for (dev = dev_base; dev != NULL; dev = dev->next) { |
e5ed6399 | 1993 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1994 | if (in_dev && (dev->flags & IFF_UP)) { |
1995 | struct in_ifaddr * ifa; | |
1996 | ||
1997 | int flag = scope; | |
1998 | ||
1999 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2000 | int plen; | |
2001 | ||
2002 | addr.s6_addr32[3] = ifa->ifa_local; | |
2003 | ||
2004 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2005 | continue; | |
2006 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2007 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2008 | continue; | |
2009 | flag |= IFA_HOST; | |
2010 | } | |
2011 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2012 | plen = 64; | |
2013 | else | |
2014 | plen = 96; | |
2015 | ||
2016 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2017 | IFA_F_PERMANENT); | |
2018 | if (!IS_ERR(ifp)) { | |
2019 | spin_lock_bh(&ifp->lock); | |
2020 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2021 | spin_unlock_bh(&ifp->lock); | |
2022 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2023 | in6_ifa_put(ifp); | |
2024 | } | |
2025 | } | |
2026 | } | |
1ab1457c | 2027 | } |
1da177e4 | 2028 | } |
0be669bb | 2029 | #endif |
1da177e4 LT |
2030 | |
2031 | static void init_loopback(struct net_device *dev) | |
2032 | { | |
2033 | struct inet6_dev *idev; | |
2034 | struct inet6_ifaddr * ifp; | |
2035 | ||
2036 | /* ::1 */ | |
2037 | ||
2038 | ASSERT_RTNL(); | |
2039 | ||
2040 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2041 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2042 | return; | |
2043 | } | |
2044 | ||
2045 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2046 | if (!IS_ERR(ifp)) { | |
2047 | spin_lock_bh(&ifp->lock); | |
2048 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2049 | spin_unlock_bh(&ifp->lock); | |
2050 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2051 | in6_ifa_put(ifp); | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2056 | { | |
2057 | struct inet6_ifaddr * ifp; | |
2058 | ||
2059 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2060 | if (!IS_ERR(ifp)) { | |
46d48046 | 2061 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2062 | addrconf_dad_start(ifp, 0); |
2063 | in6_ifa_put(ifp); | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | static void addrconf_dev_config(struct net_device *dev) | |
2068 | { | |
2069 | struct in6_addr addr; | |
2070 | struct inet6_dev * idev; | |
2071 | ||
2072 | ASSERT_RTNL(); | |
2073 | ||
1ab1457c | 2074 | if ((dev->type != ARPHRD_ETHER) && |
1da177e4 LT |
2075 | (dev->type != ARPHRD_FDDI) && |
2076 | (dev->type != ARPHRD_IEEE802_TR) && | |
2077 | (dev->type != ARPHRD_ARCNET) && | |
2078 | (dev->type != ARPHRD_INFINIBAND)) { | |
2079 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2080 | return; | |
2081 | } | |
2082 | ||
2083 | idev = addrconf_add_dev(dev); | |
2084 | if (idev == NULL) | |
2085 | return; | |
2086 | ||
2087 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2088 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2089 | ||
2090 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2091 | addrconf_add_linklocal(idev, &addr); | |
2092 | } | |
2093 | ||
0be669bb | 2094 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2095 | static void addrconf_sit_config(struct net_device *dev) |
2096 | { | |
2097 | struct inet6_dev *idev; | |
2098 | ||
2099 | ASSERT_RTNL(); | |
2100 | ||
1ab1457c YH |
2101 | /* |
2102 | * Configure the tunnel with one of our IPv4 | |
2103 | * addresses... we should configure all of | |
1da177e4 LT |
2104 | * our v4 addrs in the tunnel |
2105 | */ | |
2106 | ||
2107 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2108 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2109 | return; | |
2110 | } | |
2111 | ||
2112 | sit_add_v4_addrs(idev); | |
2113 | ||
2114 | if (dev->flags&IFF_POINTOPOINT) { | |
2115 | addrconf_add_mroute(dev); | |
2116 | addrconf_add_lroute(dev); | |
2117 | } else | |
2118 | sit_route_add(dev); | |
2119 | } | |
0be669bb | 2120 | #endif |
1da177e4 LT |
2121 | |
2122 | static inline int | |
2123 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2124 | { | |
2125 | struct in6_addr lladdr; | |
2126 | ||
2127 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2128 | addrconf_add_linklocal(idev, &lladdr); | |
2129 | return 0; | |
2130 | } | |
2131 | return -1; | |
2132 | } | |
2133 | ||
2134 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2135 | { | |
2136 | struct net_device *link_dev; | |
2137 | ||
2138 | /* first try to inherit the link-local address from the link device */ | |
2139 | if (idev->dev->iflink && | |
2140 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2141 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2142 | return; | |
2143 | } | |
2144 | /* then try to inherit it from any device */ | |
2145 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2146 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2147 | return; | |
2148 | } | |
2149 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2154 | * DHCPv6, MLD etc. can be run over the virtual link | |
2155 | */ | |
2156 | ||
2157 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2158 | { | |
2159 | struct inet6_dev *idev; | |
2160 | ||
2161 | ASSERT_RTNL(); | |
2162 | ||
2163 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2164 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2165 | return; | |
2166 | } | |
2167 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2168 | } |
2169 | ||
1ab1457c | 2170 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2171 | void * data) |
2172 | { | |
2173 | struct net_device *dev = (struct net_device *) data; | |
2174 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2175 | int run_pending = 0; |
1da177e4 LT |
2176 | |
2177 | switch(event) { | |
45ba9dd2 YH |
2178 | case NETDEV_REGISTER: |
2179 | if (!idev) { | |
2180 | idev = ipv6_add_dev(dev); | |
2181 | if (!idev) | |
2182 | printk(KERN_WARNING "IPv6: add_dev failed for %s\n", | |
2183 | dev->name); | |
2184 | } | |
2185 | break; | |
1da177e4 | 2186 | case NETDEV_UP: |
3c21edbd YH |
2187 | case NETDEV_CHANGE: |
2188 | if (event == NETDEV_UP) { | |
2189 | if (!netif_carrier_ok(dev)) { | |
2190 | /* device is not ready yet. */ | |
2191 | printk(KERN_INFO | |
2192 | "ADDRCONF(NETDEV_UP): %s: " | |
2193 | "link is not ready\n", | |
2194 | dev->name); | |
2195 | break; | |
2196 | } | |
99081049 KS |
2197 | |
2198 | if (idev) | |
2199 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2200 | } else { |
2201 | if (!netif_carrier_ok(dev)) { | |
2202 | /* device is still not ready. */ | |
2203 | break; | |
2204 | } | |
2205 | ||
2206 | if (idev) { | |
2207 | if (idev->if_flags & IF_READY) { | |
2208 | /* device is already configured. */ | |
2209 | break; | |
2210 | } | |
2211 | idev->if_flags |= IF_READY; | |
2212 | } | |
2213 | ||
2214 | printk(KERN_INFO | |
2215 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2216 | "link becomes ready\n", | |
2217 | dev->name); | |
2218 | ||
c5e33bdd | 2219 | run_pending = 1; |
3c21edbd YH |
2220 | } |
2221 | ||
1da177e4 | 2222 | switch(dev->type) { |
0be669bb | 2223 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2224 | case ARPHRD_SIT: |
2225 | addrconf_sit_config(dev); | |
2226 | break; | |
0be669bb | 2227 | #endif |
1da177e4 LT |
2228 | case ARPHRD_TUNNEL6: |
2229 | addrconf_ip6_tnl_config(dev); | |
2230 | break; | |
2231 | case ARPHRD_LOOPBACK: | |
2232 | init_loopback(dev); | |
2233 | break; | |
2234 | ||
2235 | default: | |
2236 | addrconf_dev_config(dev); | |
2237 | break; | |
2238 | }; | |
2239 | if (idev) { | |
c5e33bdd YH |
2240 | if (run_pending) |
2241 | addrconf_dad_run(idev); | |
2242 | ||
1da177e4 LT |
2243 | /* If the MTU changed during the interface down, when the |
2244 | interface up, the changed MTU must be reflected in the | |
2245 | idev as well as routers. | |
2246 | */ | |
2247 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2248 | rt6_mtu_change(dev, dev->mtu); | |
2249 | idev->cnf.mtu6 = dev->mtu; | |
2250 | } | |
2251 | idev->tstamp = jiffies; | |
2252 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2253 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2254 | stop IPv6 on this interface. | |
2255 | */ | |
2256 | if (dev->mtu < IPV6_MIN_MTU) | |
2257 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2258 | } | |
2259 | break; | |
2260 | ||
2261 | case NETDEV_CHANGEMTU: | |
2262 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2263 | rt6_mtu_change(dev, dev->mtu); | |
2264 | idev->cnf.mtu6 = dev->mtu; | |
2265 | break; | |
2266 | } | |
2267 | ||
2268 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2269 | ||
2270 | case NETDEV_DOWN: | |
2271 | case NETDEV_UNREGISTER: | |
2272 | /* | |
2273 | * Remove all addresses from this interface. | |
2274 | */ | |
2275 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2276 | break; | |
3c21edbd | 2277 | |
1da177e4 LT |
2278 | case NETDEV_CHANGENAME: |
2279 | #ifdef CONFIG_SYSCTL | |
2280 | if (idev) { | |
2281 | addrconf_sysctl_unregister(&idev->cnf); | |
2282 | neigh_sysctl_unregister(idev->nd_parms); | |
2283 | neigh_sysctl_register(dev, idev->nd_parms, | |
2284 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2285 | &ndisc_ifinfo_sysctl_change, | |
2286 | NULL); | |
2287 | addrconf_sysctl_register(idev, &idev->cnf); | |
2288 | } | |
2289 | #endif | |
2290 | break; | |
2291 | }; | |
2292 | ||
2293 | return NOTIFY_OK; | |
2294 | } | |
2295 | ||
2296 | /* | |
2297 | * addrconf module should be notified of a device going up | |
2298 | */ | |
2299 | static struct notifier_block ipv6_dev_notf = { | |
2300 | .notifier_call = addrconf_notify, | |
2301 | .priority = 0 | |
2302 | }; | |
2303 | ||
2304 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2305 | { | |
2306 | struct inet6_dev *idev; | |
2307 | struct inet6_ifaddr *ifa, **bifa; | |
2308 | int i; | |
2309 | ||
2310 | ASSERT_RTNL(); | |
2311 | ||
2312 | if (dev == &loopback_dev && how == 1) | |
2313 | how = 0; | |
2314 | ||
2315 | rt6_ifdown(dev); | |
2316 | neigh_ifdown(&nd_tbl, dev); | |
2317 | ||
2318 | idev = __in6_dev_get(dev); | |
2319 | if (idev == NULL) | |
2320 | return -ENODEV; | |
2321 | ||
2322 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2323 | Do not dev_put! |
1da177e4 LT |
2324 | */ |
2325 | if (how == 1) { | |
1da177e4 | 2326 | idev->dead = 1; |
8814c4b5 YH |
2327 | |
2328 | /* protected by rtnl_lock */ | |
2329 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2330 | |
2331 | /* Step 1.5: remove snmp6 entry */ | |
2332 | snmp6_unregister_dev(idev); | |
2333 | ||
2334 | } | |
2335 | ||
2336 | /* Step 2: clear hash table */ | |
2337 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2338 | bifa = &inet6_addr_lst[i]; | |
2339 | ||
2340 | write_lock_bh(&addrconf_hash_lock); | |
2341 | while ((ifa = *bifa) != NULL) { | |
2342 | if (ifa->idev == idev) { | |
2343 | *bifa = ifa->lst_next; | |
2344 | ifa->lst_next = NULL; | |
2345 | addrconf_del_timer(ifa); | |
2346 | in6_ifa_put(ifa); | |
2347 | continue; | |
2348 | } | |
2349 | bifa = &ifa->lst_next; | |
2350 | } | |
2351 | write_unlock_bh(&addrconf_hash_lock); | |
2352 | } | |
2353 | ||
2354 | write_lock_bh(&idev->lock); | |
2355 | ||
2356 | /* Step 3: clear flags for stateless addrconf */ | |
2357 | if (how != 1) | |
3c21edbd | 2358 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2359 | |
2360 | /* Step 4: clear address list */ | |
2361 | #ifdef CONFIG_IPV6_PRIVACY | |
2362 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2363 | in6_dev_put(idev); | |
2364 | ||
2365 | /* clear tempaddr list */ | |
2366 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2367 | idev->tempaddr_list = ifa->tmp_next; | |
2368 | ifa->tmp_next = NULL; | |
2369 | ifa->dead = 1; | |
2370 | write_unlock_bh(&idev->lock); | |
2371 | spin_lock_bh(&ifa->lock); | |
2372 | ||
2373 | if (ifa->ifpub) { | |
2374 | in6_ifa_put(ifa->ifpub); | |
2375 | ifa->ifpub = NULL; | |
2376 | } | |
2377 | spin_unlock_bh(&ifa->lock); | |
2378 | in6_ifa_put(ifa); | |
2379 | write_lock_bh(&idev->lock); | |
2380 | } | |
2381 | #endif | |
2382 | while ((ifa = idev->addr_list) != NULL) { | |
2383 | idev->addr_list = ifa->if_next; | |
2384 | ifa->if_next = NULL; | |
2385 | ifa->dead = 1; | |
2386 | addrconf_del_timer(ifa); | |
2387 | write_unlock_bh(&idev->lock); | |
2388 | ||
2389 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2390 | in6_ifa_put(ifa); | |
2391 | ||
2392 | write_lock_bh(&idev->lock); | |
2393 | } | |
2394 | write_unlock_bh(&idev->lock); | |
2395 | ||
2396 | /* Step 5: Discard multicast list */ | |
2397 | ||
2398 | if (how == 1) | |
2399 | ipv6_mc_destroy_dev(idev); | |
2400 | else | |
2401 | ipv6_mc_down(idev); | |
2402 | ||
2403 | /* Step 5: netlink notification of this interface */ | |
2404 | idev->tstamp = jiffies; | |
979ad663 | 2405 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2406 | |
1da177e4 LT |
2407 | /* Shot the device (if unregistered) */ |
2408 | ||
2409 | if (how == 1) { | |
2410 | #ifdef CONFIG_SYSCTL | |
2411 | addrconf_sysctl_unregister(&idev->cnf); | |
2412 | neigh_sysctl_unregister(idev->nd_parms); | |
2413 | #endif | |
2414 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2415 | neigh_ifdown(&nd_tbl, dev); | |
2416 | in6_dev_put(idev); | |
2417 | } | |
2418 | return 0; | |
2419 | } | |
2420 | ||
2421 | static void addrconf_rs_timer(unsigned long data) | |
2422 | { | |
2423 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2424 | ||
2425 | if (ifp->idev->cnf.forwarding) | |
2426 | goto out; | |
2427 | ||
2428 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2429 | /* | |
2430 | * Announcement received after solicitation | |
2431 | * was sent | |
2432 | */ | |
2433 | goto out; | |
2434 | } | |
2435 | ||
2436 | spin_lock(&ifp->lock); | |
2437 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2438 | struct in6_addr all_routers; | |
2439 | ||
2440 | /* The wait after the last probe can be shorter */ | |
2441 | addrconf_mod_timer(ifp, AC_RS, | |
2442 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2443 | ifp->idev->cnf.rtr_solicit_delay : | |
2444 | ifp->idev->cnf.rtr_solicit_interval); | |
2445 | spin_unlock(&ifp->lock); | |
2446 | ||
2447 | ipv6_addr_all_routers(&all_routers); | |
2448 | ||
2449 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2450 | } else { | |
2451 | spin_unlock(&ifp->lock); | |
2452 | /* | |
2453 | * Note: we do not support deprecated "all on-link" | |
2454 | * assumption any longer. | |
2455 | */ | |
2456 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2457 | ifp->idev->dev->name); | |
2458 | } | |
2459 | ||
2460 | out: | |
2461 | in6_ifa_put(ifp); | |
2462 | } | |
2463 | ||
2464 | /* | |
2465 | * Duplicate Address Detection | |
2466 | */ | |
3c21edbd YH |
2467 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2468 | { | |
2469 | unsigned long rand_num; | |
2470 | struct inet6_dev *idev = ifp->idev; | |
2471 | ||
2472 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2473 | ifp->probes = idev->cnf.dad_transmits; | |
2474 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2475 | } | |
2476 | ||
e431b8c0 | 2477 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2478 | { |
2479 | struct inet6_dev *idev = ifp->idev; | |
2480 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2481 | |
2482 | addrconf_join_solict(dev, &ifp->addr); | |
2483 | ||
1da177e4 | 2484 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2485 | |
2486 | read_lock_bh(&idev->lock); | |
2487 | if (ifp->dead) | |
2488 | goto out; | |
2489 | spin_lock_bh(&ifp->lock); | |
2490 | ||
2491 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2492 | !(ifp->flags&IFA_F_TENTATIVE) || |
2493 | ifp->flags & IFA_F_NODAD) { | |
1da177e4 LT |
2494 | ifp->flags &= ~IFA_F_TENTATIVE; |
2495 | spin_unlock_bh(&ifp->lock); | |
2496 | read_unlock_bh(&idev->lock); | |
2497 | ||
2498 | addrconf_dad_completed(ifp); | |
2499 | return; | |
2500 | } | |
2501 | ||
6732bade | 2502 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2503 | spin_unlock_bh(&ifp->lock); |
6732bade | 2504 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2505 | /* |
2506 | * If the defice is not ready: | |
2507 | * - keep it tentative if it is a permanent address. | |
2508 | * - otherwise, kill it. | |
2509 | */ | |
2510 | in6_ifa_hold(ifp); | |
2511 | addrconf_dad_stop(ifp); | |
6732bade | 2512 | return; |
3c21edbd | 2513 | } |
6732bade YH |
2514 | addrconf_dad_kick(ifp); |
2515 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2516 | out: |
2517 | read_unlock_bh(&idev->lock); | |
2518 | } | |
2519 | ||
2520 | static void addrconf_dad_timer(unsigned long data) | |
2521 | { | |
2522 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2523 | struct inet6_dev *idev = ifp->idev; | |
2524 | struct in6_addr unspec; | |
2525 | struct in6_addr mcaddr; | |
2526 | ||
2527 | read_lock_bh(&idev->lock); | |
2528 | if (idev->dead) { | |
2529 | read_unlock_bh(&idev->lock); | |
2530 | goto out; | |
2531 | } | |
2532 | spin_lock_bh(&ifp->lock); | |
2533 | if (ifp->probes == 0) { | |
2534 | /* | |
2535 | * DAD was successful | |
2536 | */ | |
2537 | ||
2538 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2539 | spin_unlock_bh(&ifp->lock); | |
2540 | read_unlock_bh(&idev->lock); | |
2541 | ||
2542 | addrconf_dad_completed(ifp); | |
2543 | ||
2544 | goto out; | |
2545 | } | |
2546 | ||
2547 | ifp->probes--; | |
2548 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2549 | spin_unlock_bh(&ifp->lock); | |
2550 | read_unlock_bh(&idev->lock); | |
2551 | ||
2552 | /* send a neighbour solicitation for our addr */ | |
2553 | memset(&unspec, 0, sizeof(unspec)); | |
2554 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2555 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2556 | out: | |
2557 | in6_ifa_put(ifp); | |
2558 | } | |
2559 | ||
2560 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2561 | { | |
2562 | struct net_device * dev = ifp->idev->dev; | |
2563 | ||
2564 | /* | |
2565 | * Configure the address for reception. Now it is valid. | |
2566 | */ | |
2567 | ||
2568 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2569 | ||
2570 | /* If added prefix is link local and forwarding is off, | |
2571 | start sending router solicitations. | |
2572 | */ | |
2573 | ||
2574 | if (ifp->idev->cnf.forwarding == 0 && | |
2575 | ifp->idev->cnf.rtr_solicits > 0 && | |
2576 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2577 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2578 | struct in6_addr all_routers; | |
2579 | ||
2580 | ipv6_addr_all_routers(&all_routers); | |
2581 | ||
2582 | /* | |
2583 | * If a host as already performed a random delay | |
2584 | * [...] as part of DAD [...] there is no need | |
2585 | * to delay again before sending the first RS | |
2586 | */ | |
2587 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2588 | ||
2589 | spin_lock_bh(&ifp->lock); | |
2590 | ifp->probes = 1; | |
2591 | ifp->idev->if_flags |= IF_RS_SENT; | |
2592 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2593 | spin_unlock_bh(&ifp->lock); | |
2594 | } | |
2595 | } | |
2596 | ||
c5e33bdd YH |
2597 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2598 | struct inet6_ifaddr *ifp; | |
2599 | ||
2600 | read_lock_bh(&idev->lock); | |
2601 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2602 | spin_lock_bh(&ifp->lock); | |
2603 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2604 | spin_unlock_bh(&ifp->lock); | |
2605 | continue; | |
2606 | } | |
2607 | spin_unlock_bh(&ifp->lock); | |
2608 | addrconf_dad_kick(ifp); | |
2609 | } | |
2610 | read_unlock_bh(&idev->lock); | |
2611 | } | |
2612 | ||
1da177e4 LT |
2613 | #ifdef CONFIG_PROC_FS |
2614 | struct if6_iter_state { | |
2615 | int bucket; | |
2616 | }; | |
2617 | ||
2618 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2619 | { | |
2620 | struct inet6_ifaddr *ifa = NULL; | |
2621 | struct if6_iter_state *state = seq->private; | |
2622 | ||
2623 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2624 | ifa = inet6_addr_lst[state->bucket]; | |
2625 | if (ifa) | |
2626 | break; | |
2627 | } | |
2628 | return ifa; | |
2629 | } | |
2630 | ||
2631 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2632 | { | |
2633 | struct if6_iter_state *state = seq->private; | |
2634 | ||
2635 | ifa = ifa->lst_next; | |
2636 | try_again: | |
2637 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2638 | ifa = inet6_addr_lst[state->bucket]; | |
2639 | goto try_again; | |
2640 | } | |
2641 | return ifa; | |
2642 | } | |
2643 | ||
2644 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2645 | { | |
2646 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2647 | ||
2648 | if (ifa) | |
2649 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2650 | --pos; | |
2651 | return pos ? NULL : ifa; | |
2652 | } | |
2653 | ||
2654 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2655 | { | |
2656 | read_lock_bh(&addrconf_hash_lock); | |
2657 | return if6_get_idx(seq, *pos); | |
2658 | } | |
2659 | ||
2660 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2661 | { | |
2662 | struct inet6_ifaddr *ifa; | |
2663 | ||
2664 | ifa = if6_get_next(seq, v); | |
2665 | ++*pos; | |
2666 | return ifa; | |
2667 | } | |
2668 | ||
2669 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2670 | { | |
2671 | read_unlock_bh(&addrconf_hash_lock); | |
2672 | } | |
2673 | ||
2674 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2675 | { | |
2676 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2677 | seq_printf(seq, | |
9343e79a | 2678 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2679 | NIP6(ifp->addr), |
2680 | ifp->idev->dev->ifindex, | |
2681 | ifp->prefix_len, | |
2682 | ifp->scope, | |
2683 | ifp->flags, | |
2684 | ifp->idev->dev->name); | |
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | static struct seq_operations if6_seq_ops = { | |
2689 | .start = if6_seq_start, | |
2690 | .next = if6_seq_next, | |
2691 | .show = if6_seq_show, | |
2692 | .stop = if6_seq_stop, | |
2693 | }; | |
2694 | ||
2695 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2696 | { | |
2697 | struct seq_file *seq; | |
2698 | int rc = -ENOMEM; | |
322f74a4 | 2699 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2700 | |
2701 | if (!s) | |
2702 | goto out; | |
1da177e4 LT |
2703 | |
2704 | rc = seq_open(file, &if6_seq_ops); | |
2705 | if (rc) | |
2706 | goto out_kfree; | |
2707 | ||
2708 | seq = file->private_data; | |
2709 | seq->private = s; | |
2710 | out: | |
2711 | return rc; | |
2712 | out_kfree: | |
2713 | kfree(s); | |
2714 | goto out; | |
2715 | } | |
2716 | ||
9a32144e | 2717 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2718 | .owner = THIS_MODULE, |
2719 | .open = if6_seq_open, | |
2720 | .read = seq_read, | |
2721 | .llseek = seq_lseek, | |
2722 | .release = seq_release_private, | |
2723 | }; | |
2724 | ||
2725 | int __init if6_proc_init(void) | |
2726 | { | |
2727 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2728 | return -ENOMEM; | |
2729 | return 0; | |
2730 | } | |
2731 | ||
2732 | void if6_proc_exit(void) | |
2733 | { | |
2734 | proc_net_remove("if_inet6"); | |
2735 | } | |
2736 | #endif /* CONFIG_PROC_FS */ | |
2737 | ||
3b9f9a1c NT |
2738 | #ifdef CONFIG_IPV6_MIP6 |
2739 | /* Check if address is a home address configured on any interface. */ | |
2740 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2741 | { | |
2742 | int ret = 0; | |
2743 | struct inet6_ifaddr * ifp; | |
2744 | u8 hash = ipv6_addr_hash(addr); | |
2745 | read_lock_bh(&addrconf_hash_lock); | |
2746 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2747 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2748 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2749 | ret = 1; | |
2750 | break; | |
2751 | } | |
2752 | } | |
2753 | read_unlock_bh(&addrconf_hash_lock); | |
2754 | return ret; | |
2755 | } | |
2756 | #endif | |
2757 | ||
1da177e4 LT |
2758 | /* |
2759 | * Periodic address status verification | |
2760 | */ | |
2761 | ||
2762 | static void addrconf_verify(unsigned long foo) | |
2763 | { | |
2764 | struct inet6_ifaddr *ifp; | |
2765 | unsigned long now, next; | |
2766 | int i; | |
2767 | ||
2768 | spin_lock_bh(&addrconf_verify_lock); | |
2769 | now = jiffies; | |
2770 | next = now + ADDR_CHECK_FREQUENCY; | |
2771 | ||
2772 | del_timer(&addr_chk_timer); | |
2773 | ||
2774 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2775 | ||
2776 | restart: | |
5d5780df | 2777 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2778 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2779 | unsigned long age; | |
2780 | #ifdef CONFIG_IPV6_PRIVACY | |
2781 | unsigned long regen_advance; | |
2782 | #endif | |
2783 | ||
2784 | if (ifp->flags & IFA_F_PERMANENT) | |
2785 | continue; | |
2786 | ||
2787 | spin_lock(&ifp->lock); | |
2788 | age = (now - ifp->tstamp) / HZ; | |
2789 | ||
2790 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2791 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2792 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2793 | ifp->idev->nd_parms->retrans_time / HZ; |
2794 | #endif | |
2795 | ||
8f27ebb9 YH |
2796 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2797 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2798 | spin_unlock(&ifp->lock); |
2799 | in6_ifa_hold(ifp); | |
5d5780df | 2800 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2801 | ipv6_del_addr(ifp); |
2802 | goto restart; | |
8f27ebb9 YH |
2803 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2804 | spin_unlock(&ifp->lock); | |
2805 | continue; | |
1da177e4 LT |
2806 | } else if (age >= ifp->prefered_lft) { |
2807 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2808 | int deprecate = 0; | |
2809 | ||
2810 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2811 | deprecate = 1; | |
2812 | ifp->flags |= IFA_F_DEPRECATED; | |
2813 | } | |
2814 | ||
2815 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2816 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2817 | ||
2818 | spin_unlock(&ifp->lock); | |
2819 | ||
2820 | if (deprecate) { | |
2821 | in6_ifa_hold(ifp); | |
5d5780df | 2822 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2823 | |
2824 | ipv6_ifa_notify(0, ifp); | |
2825 | in6_ifa_put(ifp); | |
2826 | goto restart; | |
2827 | } | |
2828 | #ifdef CONFIG_IPV6_PRIVACY | |
2829 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2830 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2831 | if (age >= ifp->prefered_lft - regen_advance) { | |
2832 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2833 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2834 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2835 | if (!ifp->regen_count && ifpub) { | |
2836 | ifp->regen_count++; | |
2837 | in6_ifa_hold(ifp); | |
2838 | in6_ifa_hold(ifpub); | |
2839 | spin_unlock(&ifp->lock); | |
5d5780df | 2840 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2841 | spin_lock(&ifpub->lock); |
2842 | ifpub->regen_count = 0; | |
2843 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2844 | ipv6_create_tempaddr(ifpub, ifp); |
2845 | in6_ifa_put(ifpub); | |
2846 | in6_ifa_put(ifp); | |
2847 | goto restart; | |
2848 | } | |
2849 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2850 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2851 | spin_unlock(&ifp->lock); | |
2852 | #endif | |
2853 | } else { | |
2854 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2855 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2856 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2857 | spin_unlock(&ifp->lock); | |
2858 | } | |
2859 | } | |
5d5780df | 2860 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2861 | } |
2862 | ||
2863 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2864 | add_timer(&addr_chk_timer); | |
2865 | spin_unlock_bh(&addrconf_verify_lock); | |
2866 | } | |
2867 | ||
461d8837 TG |
2868 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2869 | { | |
2870 | struct in6_addr *pfx = NULL; | |
2871 | ||
2872 | if (addr) | |
2873 | pfx = nla_data(addr); | |
2874 | ||
2875 | if (local) { | |
2876 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2877 | pfx = NULL; | |
2878 | else | |
2879 | pfx = nla_data(local); | |
2880 | } | |
2881 | ||
2882 | return pfx; | |
2883 | } | |
2884 | ||
2885 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2886 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2887 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2888 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2889 | }; | |
2890 | ||
1da177e4 LT |
2891 | static int |
2892 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2893 | { | |
b933f716 TG |
2894 | struct ifaddrmsg *ifm; |
2895 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2896 | struct in6_addr *pfx; |
b933f716 | 2897 | int err; |
1da177e4 | 2898 | |
b933f716 TG |
2899 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2900 | if (err < 0) | |
2901 | return err; | |
2902 | ||
2903 | ifm = nlmsg_data(nlh); | |
2904 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2905 | if (pfx == NULL) |
2906 | return -EINVAL; | |
2907 | ||
2908 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2909 | } | |
2910 | ||
55ebaef1 NT |
2911 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
2912 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 2913 | { |
46d48046 YH |
2914 | u32 flags = RTF_EXPIRES; |
2915 | ||
081bba5b NT |
2916 | if (!valid_lft || (prefered_lft > valid_lft)) |
2917 | return -EINVAL; | |
2918 | ||
46d48046 | 2919 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 2920 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
2921 | flags = 0; |
2922 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
2923 | valid_lft = 0x7FFFFFFF/HZ; |
2924 | ||
2925 | if (prefered_lft == 0) | |
55ebaef1 | 2926 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
2927 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
2928 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2929 | prefered_lft = 0x7FFFFFFF/HZ; | |
2930 | ||
2931 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 2932 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
2933 | ifp->tstamp = jiffies; |
2934 | ifp->valid_lft = valid_lft; | |
2935 | ifp->prefered_lft = prefered_lft; | |
2936 | ||
2937 | spin_unlock_bh(&ifp->lock); | |
2938 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2939 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 2940 | |
46d48046 YH |
2941 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
2942 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
2943 | addrconf_verify(0); |
2944 | ||
2945 | return 0; | |
2946 | } | |
2947 | ||
1da177e4 LT |
2948 | static int |
2949 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2950 | { | |
461d8837 TG |
2951 | struct ifaddrmsg *ifm; |
2952 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2953 | struct in6_addr *pfx; |
7198f8ce TG |
2954 | struct inet6_ifaddr *ifa; |
2955 | struct net_device *dev; | |
55ebaef1 NT |
2956 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
2957 | u8 ifa_flags; | |
461d8837 | 2958 | int err; |
1da177e4 | 2959 | |
461d8837 TG |
2960 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2961 | if (err < 0) | |
2962 | return err; | |
2963 | ||
2964 | ifm = nlmsg_data(nlh); | |
2965 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2966 | if (pfx == NULL) |
2967 | return -EINVAL; | |
2968 | ||
461d8837 | 2969 | if (tb[IFA_CACHEINFO]) { |
0778769d | 2970 | struct ifa_cacheinfo *ci; |
461d8837 TG |
2971 | |
2972 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 2973 | valid_lft = ci->ifa_valid; |
461d8837 TG |
2974 | preferred_lft = ci->ifa_prefered; |
2975 | } else { | |
2976 | preferred_lft = INFINITY_LIFE_TIME; | |
2977 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
2978 | } |
2979 | ||
7198f8ce TG |
2980 | dev = __dev_get_by_index(ifm->ifa_index); |
2981 | if (dev == NULL) | |
2982 | return -ENODEV; | |
2983 | ||
55ebaef1 | 2984 | /* We ignore other flags so far. */ |
3b9f9a1c | 2985 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 2986 | |
7198f8ce TG |
2987 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
2988 | if (ifa == NULL) { | |
2989 | /* | |
2990 | * It would be best to check for !NLM_F_CREATE here but | |
2991 | * userspace alreay relies on not having to provide this. | |
2992 | */ | |
2993 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 2994 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
2995 | } |
2996 | ||
7198f8ce TG |
2997 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
2998 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
2999 | err = -EEXIST; | |
3000 | else | |
55ebaef1 | 3001 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3002 | |
3003 | in6_ifa_put(ifa); | |
3004 | ||
3005 | return err; | |
1da177e4 LT |
3006 | } |
3007 | ||
101bb229 TG |
3008 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3009 | u8 scope, int ifindex) | |
3010 | { | |
3011 | struct ifaddrmsg *ifm; | |
3012 | ||
3013 | ifm = nlmsg_data(nlh); | |
3014 | ifm->ifa_family = AF_INET6; | |
3015 | ifm->ifa_prefixlen = prefixlen; | |
3016 | ifm->ifa_flags = flags; | |
3017 | ifm->ifa_scope = scope; | |
3018 | ifm->ifa_index = ifindex; | |
3019 | } | |
3020 | ||
85486af0 TG |
3021 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3022 | unsigned long tstamp, u32 preferred, u32 valid) | |
3023 | { | |
3024 | struct ifa_cacheinfo ci; | |
3025 | ||
3026 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3027 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3028 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3029 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3030 | ci.ifa_prefered = preferred; | |
3031 | ci.ifa_valid = valid; | |
3032 | ||
3033 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3034 | } | |
3035 | ||
101bb229 TG |
3036 | static inline int rt_scope(int ifa_scope) |
3037 | { | |
3038 | if (ifa_scope & IFA_HOST) | |
3039 | return RT_SCOPE_HOST; | |
3040 | else if (ifa_scope & IFA_LINK) | |
3041 | return RT_SCOPE_LINK; | |
3042 | else if (ifa_scope & IFA_SITE) | |
3043 | return RT_SCOPE_SITE; | |
3044 | else | |
3045 | return RT_SCOPE_UNIVERSE; | |
3046 | } | |
3047 | ||
0ab6803b TG |
3048 | static inline int inet6_ifaddr_msgsize(void) |
3049 | { | |
339bf98f TG |
3050 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3051 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3052 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3053 | } |
c5396a31 | 3054 | |
1da177e4 | 3055 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3056 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3057 | { |
1da177e4 | 3058 | struct nlmsghdr *nlh; |
85486af0 | 3059 | u32 preferred, valid; |
1da177e4 | 3060 | |
0ab6803b TG |
3061 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3062 | if (nlh == NULL) | |
26932566 | 3063 | return -EMSGSIZE; |
0ab6803b | 3064 | |
101bb229 TG |
3065 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3066 | ifa->idev->dev->ifindex); | |
3067 | ||
1da177e4 | 3068 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3069 | preferred = ifa->prefered_lft; |
3070 | valid = ifa->valid_lft; | |
3071 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3072 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3073 | preferred -= tval; |
3074 | if (valid != INFINITY_LIFE_TIME) | |
3075 | valid -= tval; | |
1da177e4 LT |
3076 | } |
3077 | } else { | |
85486af0 TG |
3078 | preferred = INFINITY_LIFE_TIME; |
3079 | valid = INFINITY_LIFE_TIME; | |
3080 | } | |
3081 | ||
0ab6803b | 3082 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3083 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3084 | nlmsg_cancel(skb, nlh); | |
3085 | return -EMSGSIZE; | |
3086 | } | |
1da177e4 | 3087 | |
0ab6803b | 3088 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3089 | } |
3090 | ||
3091 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3092 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3093 | { |
1da177e4 | 3094 | struct nlmsghdr *nlh; |
101bb229 TG |
3095 | u8 scope = RT_SCOPE_UNIVERSE; |
3096 | int ifindex = ifmca->idev->dev->ifindex; | |
3097 | ||
3098 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3099 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3100 | |
0ab6803b TG |
3101 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3102 | if (nlh == NULL) | |
26932566 | 3103 | return -EMSGSIZE; |
85486af0 | 3104 | |
0ab6803b TG |
3105 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3106 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3107 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3108 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3109 | nlmsg_cancel(skb, nlh); | |
3110 | return -EMSGSIZE; | |
3111 | } | |
85486af0 | 3112 | |
0ab6803b | 3113 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3114 | } |
3115 | ||
3116 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3117 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3118 | { |
1da177e4 | 3119 | struct nlmsghdr *nlh; |
101bb229 TG |
3120 | u8 scope = RT_SCOPE_UNIVERSE; |
3121 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3122 | ||
3123 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3124 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3125 | |
0ab6803b TG |
3126 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3127 | if (nlh == NULL) | |
26932566 | 3128 | return -EMSGSIZE; |
85486af0 | 3129 | |
0ab6803b TG |
3130 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3131 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3132 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3133 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3134 | nlmsg_cancel(skb, nlh); | |
3135 | return -EMSGSIZE; | |
3136 | } | |
1da177e4 | 3137 | |
0ab6803b | 3138 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3139 | } |
3140 | ||
3141 | enum addr_type_t | |
3142 | { | |
3143 | UNICAST_ADDR, | |
3144 | MULTICAST_ADDR, | |
3145 | ANYCAST_ADDR, | |
3146 | }; | |
3147 | ||
3148 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3149 | enum addr_type_t type) | |
3150 | { | |
3151 | int idx, ip_idx; | |
3152 | int s_idx, s_ip_idx; | |
3153 | int err = 1; | |
3154 | struct net_device *dev; | |
3155 | struct inet6_dev *idev = NULL; | |
3156 | struct inet6_ifaddr *ifa; | |
3157 | struct ifmcaddr6 *ifmca; | |
3158 | struct ifacaddr6 *ifaca; | |
3159 | ||
3160 | s_idx = cb->args[0]; | |
3161 | s_ip_idx = ip_idx = cb->args[1]; | |
3162 | read_lock(&dev_base_lock); | |
1ab1457c | 3163 | |
1da177e4 LT |
3164 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
3165 | if (idx < s_idx) | |
3166 | continue; | |
3167 | if (idx > s_idx) | |
3168 | s_ip_idx = 0; | |
3169 | ip_idx = 0; | |
3170 | if ((idev = in6_dev_get(dev)) == NULL) | |
3171 | continue; | |
3172 | read_lock_bh(&idev->lock); | |
3173 | switch (type) { | |
3174 | case UNICAST_ADDR: | |
ae9cda5d | 3175 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3176 | for (ifa = idev->addr_list; ifa; |
3177 | ifa = ifa->if_next, ip_idx++) { | |
3178 | if (ip_idx < s_ip_idx) | |
3179 | continue; | |
1ab1457c YH |
3180 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3181 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3182 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3183 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3184 | goto done; |
3185 | } | |
1da177e4 LT |
3186 | break; |
3187 | case MULTICAST_ADDR: | |
3188 | /* multicast address */ | |
1ab1457c | 3189 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3190 | ifmca = ifmca->next, ip_idx++) { |
3191 | if (ip_idx < s_ip_idx) | |
3192 | continue; | |
1ab1457c YH |
3193 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3194 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3195 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3196 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3197 | goto done; |
3198 | } | |
3199 | break; | |
3200 | case ANYCAST_ADDR: | |
3201 | /* anycast address */ | |
3202 | for (ifaca = idev->ac_list; ifaca; | |
3203 | ifaca = ifaca->aca_next, ip_idx++) { | |
3204 | if (ip_idx < s_ip_idx) | |
3205 | continue; | |
1ab1457c YH |
3206 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3207 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3208 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3209 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3210 | goto done; |
3211 | } | |
3212 | break; | |
3213 | default: | |
3214 | break; | |
3215 | } | |
3216 | read_unlock_bh(&idev->lock); | |
3217 | in6_dev_put(idev); | |
3218 | } | |
3219 | done: | |
3220 | if (err <= 0) { | |
3221 | read_unlock_bh(&idev->lock); | |
3222 | in6_dev_put(idev); | |
3223 | } | |
3224 | read_unlock(&dev_base_lock); | |
3225 | cb->args[0] = idx; | |
3226 | cb->args[1] = ip_idx; | |
3227 | return skb->len; | |
3228 | } | |
3229 | ||
3230 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3231 | { | |
3232 | enum addr_type_t type = UNICAST_ADDR; | |
3233 | return inet6_dump_addr(skb, cb, type); | |
3234 | } | |
3235 | ||
3236 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3237 | { | |
3238 | enum addr_type_t type = MULTICAST_ADDR; | |
3239 | return inet6_dump_addr(skb, cb, type); | |
3240 | } | |
3241 | ||
3242 | ||
3243 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3244 | { | |
3245 | enum addr_type_t type = ANYCAST_ADDR; | |
3246 | return inet6_dump_addr(skb, cb, type); | |
3247 | } | |
3248 | ||
1b29fc2c TG |
3249 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3250 | void *arg) | |
6c223828 | 3251 | { |
1b29fc2c TG |
3252 | struct ifaddrmsg *ifm; |
3253 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3254 | struct in6_addr *addr = NULL; |
3255 | struct net_device *dev = NULL; | |
3256 | struct inet6_ifaddr *ifa; | |
3257 | struct sk_buff *skb; | |
6c223828 NT |
3258 | int err; |
3259 | ||
1b29fc2c TG |
3260 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3261 | if (err < 0) | |
3262 | goto errout; | |
3263 | ||
3264 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3265 | if (addr == NULL) { | |
3266 | err = -EINVAL; | |
3267 | goto errout; | |
6c223828 | 3268 | } |
6c223828 | 3269 | |
1b29fc2c | 3270 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3271 | if (ifm->ifa_index) |
3272 | dev = __dev_get_by_index(ifm->ifa_index); | |
3273 | ||
1b29fc2c TG |
3274 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3275 | err = -EADDRNOTAVAIL; | |
3276 | goto errout; | |
3277 | } | |
6c223828 | 3278 | |
0ab6803b | 3279 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3280 | err = -ENOBUFS; |
1b29fc2c | 3281 | goto errout_ifa; |
6c223828 NT |
3282 | } |
3283 | ||
6c223828 NT |
3284 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3285 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3286 | if (err < 0) { |
3287 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3288 | WARN_ON(err == -EMSGSIZE); | |
3289 | kfree_skb(skb); | |
3290 | goto errout_ifa; | |
3291 | } | |
2942e900 | 3292 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3293 | errout_ifa: |
6c223828 | 3294 | in6_ifa_put(ifa); |
1b29fc2c | 3295 | errout: |
6c223828 | 3296 | return err; |
6c223828 NT |
3297 | } |
3298 | ||
1da177e4 LT |
3299 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3300 | { | |
3301 | struct sk_buff *skb; | |
5d620266 | 3302 | int err = -ENOBUFS; |
1da177e4 | 3303 | |
0ab6803b | 3304 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3305 | if (skb == NULL) |
3306 | goto errout; | |
3307 | ||
3308 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3309 | if (err < 0) { |
3310 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3311 | WARN_ON(err == -EMSGSIZE); | |
3312 | kfree_skb(skb); | |
3313 | goto errout; | |
3314 | } | |
5d620266 TG |
3315 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3316 | errout: | |
3317 | if (err < 0) | |
3318 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3319 | } |
3320 | ||
3321 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3322 | __s32 *array, int bytes) | |
3323 | { | |
04561c1f TG |
3324 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3325 | ||
1da177e4 LT |
3326 | memset(array, 0, bytes); |
3327 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3328 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3329 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3330 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3331 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3332 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3333 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3334 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3335 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3336 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3337 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3338 | #ifdef CONFIG_IPV6_PRIVACY | |
3339 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3340 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3341 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3342 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3343 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3344 | #endif | |
3345 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3346 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3347 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3348 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3349 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3350 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3351 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3352 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3353 | #endif | |
930d6ff2 | 3354 | #endif |
fbea49e1 | 3355 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
1da177e4 LT |
3356 | } |
3357 | ||
339bf98f TG |
3358 | static inline size_t inet6_if_nlmsg_size(void) |
3359 | { | |
3360 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3361 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3362 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3363 | + nla_total_size(4) /* IFLA_MTU */ | |
3364 | + nla_total_size(4) /* IFLA_LINK */ | |
3365 | + nla_total_size( /* IFLA_PROTINFO */ | |
3366 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3367 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3368 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3369 | ); | |
3370 | } | |
c5396a31 | 3371 | |
1ab1457c | 3372 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3373 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3374 | { |
04561c1f TG |
3375 | struct net_device *dev = idev->dev; |
3376 | struct nlattr *conf; | |
3377 | struct ifinfomsg *hdr; | |
3378 | struct nlmsghdr *nlh; | |
3379 | void *protoinfo; | |
3380 | struct ifla_cacheinfo ci; | |
3381 | ||
3382 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3383 | if (nlh == NULL) | |
26932566 | 3384 | return -EMSGSIZE; |
04561c1f TG |
3385 | |
3386 | hdr = nlmsg_data(nlh); | |
3387 | hdr->ifi_family = AF_INET6; | |
3388 | hdr->__ifi_pad = 0; | |
3389 | hdr->ifi_type = dev->type; | |
3390 | hdr->ifi_index = dev->ifindex; | |
3391 | hdr->ifi_flags = dev_get_flags(dev); | |
3392 | hdr->ifi_change = 0; | |
3393 | ||
3394 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3395 | |
3396 | if (dev->addr_len) | |
04561c1f | 3397 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3398 | |
04561c1f | 3399 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3400 | if (dev->ifindex != dev->iflink) |
04561c1f | 3401 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3402 | |
04561c1f TG |
3403 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3404 | if (protoinfo == NULL) | |
3405 | goto nla_put_failure; | |
1da177e4 | 3406 | |
04561c1f | 3407 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3408 | |
1da177e4 LT |
3409 | ci.max_reasm_len = IPV6_MAXPLEN; |
3410 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3411 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3412 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3413 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3414 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3415 | ||
3416 | conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); | |
3417 | if (conf == NULL) | |
3418 | goto nla_put_failure; | |
3419 | ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf)); | |
1da177e4 LT |
3420 | |
3421 | /* XXX - Statistics/MC not implemented */ | |
1da177e4 | 3422 | |
04561c1f TG |
3423 | nla_nest_end(skb, protoinfo); |
3424 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3425 | |
04561c1f | 3426 | nla_put_failure: |
26932566 PM |
3427 | nlmsg_cancel(skb, nlh); |
3428 | return -EMSGSIZE; | |
1da177e4 LT |
3429 | } |
3430 | ||
3431 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3432 | { | |
3433 | int idx, err; | |
3434 | int s_idx = cb->args[0]; | |
3435 | struct net_device *dev; | |
3436 | struct inet6_dev *idev; | |
3437 | ||
3438 | read_lock(&dev_base_lock); | |
3439 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3440 | if (idx < s_idx) | |
3441 | continue; | |
3442 | if ((idev = in6_dev_get(dev)) == NULL) | |
3443 | continue; | |
1ab1457c | 3444 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3445 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3446 | in6_dev_put(idev); |
3447 | if (err <= 0) | |
3448 | break; | |
3449 | } | |
3450 | read_unlock(&dev_base_lock); | |
3451 | cb->args[0] = idx; | |
3452 | ||
3453 | return skb->len; | |
3454 | } | |
3455 | ||
3456 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3457 | { | |
3458 | struct sk_buff *skb; | |
8d7a76c9 | 3459 | int err = -ENOBUFS; |
1ab1457c | 3460 | |
339bf98f | 3461 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3462 | if (skb == NULL) |
3463 | goto errout; | |
3464 | ||
3465 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3466 | if (err < 0) { |
3467 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3468 | WARN_ON(err == -EMSGSIZE); | |
3469 | kfree_skb(skb); | |
3470 | goto errout; | |
3471 | } | |
8d7a76c9 TG |
3472 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3473 | errout: | |
3474 | if (err < 0) | |
3475 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3476 | } |
3477 | ||
339bf98f TG |
3478 | static inline size_t inet6_prefix_nlmsg_size(void) |
3479 | { | |
3480 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3481 | + nla_total_size(sizeof(struct in6_addr)) | |
3482 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3483 | } | |
c5396a31 | 3484 | |
1da177e4 | 3485 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3486 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3487 | int event, unsigned int flags) | |
1da177e4 | 3488 | { |
6051e2f4 TG |
3489 | struct prefixmsg *pmsg; |
3490 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3491 | struct prefix_cacheinfo ci; |
3492 | ||
6051e2f4 TG |
3493 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3494 | if (nlh == NULL) | |
26932566 | 3495 | return -EMSGSIZE; |
6051e2f4 TG |
3496 | |
3497 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3498 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3499 | pmsg->prefix_pad1 = 0; |
3500 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3501 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3502 | pmsg->prefix_len = pinfo->prefix_len; | |
3503 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3504 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3505 | pmsg->prefix_flags = 0; |
3506 | if (pinfo->onlink) | |
3507 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3508 | if (pinfo->autoconf) | |
3509 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3510 | ||
6051e2f4 | 3511 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3512 | |
3513 | ci.preferred_time = ntohl(pinfo->prefered); | |
3514 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3515 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3516 | |
6051e2f4 | 3517 | return nlmsg_end(skb, nlh); |
1da177e4 | 3518 | |
6051e2f4 | 3519 | nla_put_failure: |
26932566 PM |
3520 | nlmsg_cancel(skb, nlh); |
3521 | return -EMSGSIZE; | |
1da177e4 LT |
3522 | } |
3523 | ||
1ab1457c | 3524 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3525 | struct prefix_info *pinfo) |
3526 | { | |
3527 | struct sk_buff *skb; | |
8c384bfa | 3528 | int err = -ENOBUFS; |
1da177e4 | 3529 | |
339bf98f | 3530 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3531 | if (skb == NULL) |
3532 | goto errout; | |
3533 | ||
3534 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3535 | if (err < 0) { |
3536 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3537 | WARN_ON(err == -EMSGSIZE); | |
3538 | kfree_skb(skb); | |
3539 | goto errout; | |
3540 | } | |
8c384bfa TG |
3541 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3542 | errout: | |
3543 | if (err < 0) | |
3544 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3545 | } |
3546 | ||
db46edc6 | 3547 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3548 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3549 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3550 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
6c223828 NT |
3551 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, |
3552 | .dumpit = inet6_dump_ifaddr, }, | |
1da177e4 LT |
3553 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
3554 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3555 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3556 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3557 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3558 | .dumpit = inet6_dump_fib, }, | |
8423a9aa | 3559 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
101367c2 | 3560 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, |
8423a9aa | 3561 | #endif |
1da177e4 LT |
3562 | }; |
3563 | ||
3564 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3565 | { | |
3566 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3567 | ||
3568 | switch (event) { | |
3569 | case RTM_NEWADDR: | |
40e22e8f | 3570 | ip6_ins_rt(ifp->rt); |
1da177e4 LT |
3571 | if (ifp->idev->cnf.forwarding) |
3572 | addrconf_join_anycast(ifp); | |
3573 | break; | |
3574 | case RTM_DELADDR: | |
3575 | if (ifp->idev->cnf.forwarding) | |
3576 | addrconf_leave_anycast(ifp); | |
3577 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3578 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3579 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3580 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3581 | break; |
3582 | } | |
3583 | } | |
3584 | ||
3585 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3586 | { | |
8814c4b5 | 3587 | rcu_read_lock_bh(); |
1da177e4 LT |
3588 | if (likely(ifp->idev->dead == 0)) |
3589 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3590 | rcu_read_unlock_bh(); |
1da177e4 LT |
3591 | } |
3592 | ||
3593 | #ifdef CONFIG_SYSCTL | |
3594 | ||
3595 | static | |
3596 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3597 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3598 | { | |
3599 | int *valp = ctl->data; | |
3600 | int val = *valp; | |
3601 | int ret; | |
3602 | ||
3603 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3604 | ||
3605 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3606 | if (valp != &ipv6_devconf.forwarding) { | |
3607 | if ((!*valp) ^ (!val)) { | |
3608 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3609 | if (idev == NULL) | |
3610 | return ret; | |
3611 | dev_forward_change(idev); | |
3612 | } | |
3613 | } else { | |
3614 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3615 | addrconf_forward_change(); | |
3616 | } | |
3617 | if (*valp) | |
3618 | rt6_purge_dflt_routers(); | |
3619 | } | |
3620 | ||
1ab1457c | 3621 | return ret; |
1da177e4 LT |
3622 | } |
3623 | ||
1ab1457c | 3624 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3625 | int __user *name, int nlen, |
3626 | void __user *oldval, | |
3627 | size_t __user *oldlenp, | |
1f29bcd7 | 3628 | void __user *newval, size_t newlen) |
1da177e4 LT |
3629 | { |
3630 | int *valp = table->data; | |
3631 | int new; | |
3632 | ||
3633 | if (!newval || !newlen) | |
3634 | return 0; | |
3635 | if (newlen != sizeof(int)) | |
3636 | return -EINVAL; | |
3637 | if (get_user(new, (int __user *)newval)) | |
3638 | return -EFAULT; | |
3639 | if (new == *valp) | |
3640 | return 0; | |
3641 | if (oldval && oldlenp) { | |
3642 | size_t len; | |
3643 | if (get_user(len, oldlenp)) | |
3644 | return -EFAULT; | |
3645 | if (len) { | |
3646 | if (len > table->maxlen) | |
3647 | len = table->maxlen; | |
3648 | if (copy_to_user(oldval, valp, len)) | |
3649 | return -EFAULT; | |
3650 | if (put_user(len, oldlenp)) | |
3651 | return -EFAULT; | |
3652 | } | |
3653 | } | |
3654 | ||
3655 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3656 | if (valp != &ipv6_devconf.forwarding) { | |
3657 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3658 | int changed; | |
3659 | if (unlikely(idev == NULL)) | |
3660 | return -ENODEV; | |
3661 | changed = (!*valp) ^ (!new); | |
3662 | *valp = new; | |
3663 | if (changed) | |
3664 | dev_forward_change(idev); | |
3665 | } else { | |
3666 | *valp = new; | |
3667 | addrconf_forward_change(); | |
3668 | } | |
3669 | ||
3670 | if (*valp) | |
3671 | rt6_purge_dflt_routers(); | |
3672 | } else | |
3673 | *valp = new; | |
3674 | ||
3675 | return 1; | |
3676 | } | |
3677 | ||
3678 | static struct addrconf_sysctl_table | |
3679 | { | |
3680 | struct ctl_table_header *sysctl_header; | |
3681 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3682 | ctl_table addrconf_dev[2]; | |
3683 | ctl_table addrconf_conf_dir[2]; | |
3684 | ctl_table addrconf_proto_dir[2]; | |
3685 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3686 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3687 | .sysctl_header = NULL, |
3688 | .addrconf_vars = { | |
1ab1457c | 3689 | { |
1da177e4 LT |
3690 | .ctl_name = NET_IPV6_FORWARDING, |
3691 | .procname = "forwarding", | |
1ab1457c | 3692 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3693 | .maxlen = sizeof(int), |
3694 | .mode = 0644, | |
1ab1457c | 3695 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3696 | .strategy = &addrconf_sysctl_forward_strategy, |
3697 | }, | |
3698 | { | |
3699 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3700 | .procname = "hop_limit", | |
1ab1457c | 3701 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3702 | .maxlen = sizeof(int), |
3703 | .mode = 0644, | |
3704 | .proc_handler = proc_dointvec, | |
3705 | }, | |
3706 | { | |
3707 | .ctl_name = NET_IPV6_MTU, | |
3708 | .procname = "mtu", | |
3709 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3710 | .maxlen = sizeof(int), |
1da177e4 | 3711 | .mode = 0644, |
1ab1457c | 3712 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3713 | }, |
3714 | { | |
3715 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3716 | .procname = "accept_ra", | |
1ab1457c | 3717 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3718 | .maxlen = sizeof(int), |
3719 | .mode = 0644, | |
1ab1457c | 3720 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3721 | }, |
3722 | { | |
3723 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3724 | .procname = "accept_redirects", | |
1ab1457c | 3725 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3726 | .maxlen = sizeof(int), |
3727 | .mode = 0644, | |
1ab1457c | 3728 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3729 | }, |
3730 | { | |
3731 | .ctl_name = NET_IPV6_AUTOCONF, | |
3732 | .procname = "autoconf", | |
1ab1457c | 3733 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3734 | .maxlen = sizeof(int), |
3735 | .mode = 0644, | |
1ab1457c | 3736 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3737 | }, |
3738 | { | |
3739 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3740 | .procname = "dad_transmits", | |
1ab1457c | 3741 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3742 | .maxlen = sizeof(int), |
3743 | .mode = 0644, | |
1ab1457c | 3744 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3745 | }, |
3746 | { | |
3747 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3748 | .procname = "router_solicitations", | |
1ab1457c | 3749 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3750 | .maxlen = sizeof(int), |
3751 | .mode = 0644, | |
1ab1457c | 3752 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3753 | }, |
3754 | { | |
3755 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3756 | .procname = "router_solicitation_interval", | |
1ab1457c | 3757 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3758 | .maxlen = sizeof(int), |
3759 | .mode = 0644, | |
1ab1457c | 3760 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3761 | .strategy = &sysctl_jiffies, |
3762 | }, | |
3763 | { | |
3764 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3765 | .procname = "router_solicitation_delay", | |
1ab1457c | 3766 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3767 | .maxlen = sizeof(int), |
3768 | .mode = 0644, | |
1ab1457c | 3769 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3770 | .strategy = &sysctl_jiffies, |
3771 | }, | |
3772 | { | |
3773 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3774 | .procname = "force_mld_version", | |
1ab1457c | 3775 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3776 | .maxlen = sizeof(int), |
3777 | .mode = 0644, | |
1ab1457c | 3778 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3779 | }, |
3780 | #ifdef CONFIG_IPV6_PRIVACY | |
3781 | { | |
3782 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3783 | .procname = "use_tempaddr", | |
1ab1457c | 3784 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3785 | .maxlen = sizeof(int), |
3786 | .mode = 0644, | |
1ab1457c | 3787 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3788 | }, |
3789 | { | |
3790 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3791 | .procname = "temp_valid_lft", | |
1ab1457c | 3792 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3793 | .maxlen = sizeof(int), |
3794 | .mode = 0644, | |
1ab1457c | 3795 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3796 | }, |
3797 | { | |
3798 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3799 | .procname = "temp_prefered_lft", | |
1ab1457c | 3800 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3801 | .maxlen = sizeof(int), |
3802 | .mode = 0644, | |
1ab1457c | 3803 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3804 | }, |
3805 | { | |
3806 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3807 | .procname = "regen_max_retry", | |
1ab1457c | 3808 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3809 | .maxlen = sizeof(int), |
3810 | .mode = 0644, | |
1ab1457c | 3811 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3812 | }, |
3813 | { | |
3814 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3815 | .procname = "max_desync_factor", | |
1ab1457c | 3816 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3817 | .maxlen = sizeof(int), |
3818 | .mode = 0644, | |
1ab1457c | 3819 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3820 | }, |
3821 | #endif | |
3822 | { | |
3823 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3824 | .procname = "max_addresses", | |
3825 | .data = &ipv6_devconf.max_addresses, | |
3826 | .maxlen = sizeof(int), | |
3827 | .mode = 0644, | |
3828 | .proc_handler = &proc_dointvec, | |
3829 | }, | |
65f5c7c1 YH |
3830 | { |
3831 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3832 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3833 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3834 | .maxlen = sizeof(int), |
3835 | .mode = 0644, | |
1ab1457c | 3836 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3837 | }, |
c4fd30eb YH |
3838 | { |
3839 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3840 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3841 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3842 | .maxlen = sizeof(int), |
3843 | .mode = 0644, | |
1ab1457c | 3844 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3845 | }, |
930d6ff2 YH |
3846 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3847 | { | |
3848 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3849 | .procname = "accept_ra_rtr_pref", | |
3850 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3851 | .maxlen = sizeof(int), | |
3852 | .mode = 0644, | |
3853 | .proc_handler = &proc_dointvec, | |
3854 | }, | |
52e16356 YH |
3855 | { |
3856 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3857 | .procname = "router_probe_interval", | |
3858 | .data = &ipv6_devconf.rtr_probe_interval, | |
3859 | .maxlen = sizeof(int), | |
3860 | .mode = 0644, | |
3861 | .proc_handler = &proc_dointvec_jiffies, | |
3862 | .strategy = &sysctl_jiffies, | |
3863 | }, | |
fa03ef38 | 3864 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3865 | { |
3866 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3867 | .procname = "accept_ra_rt_info_max_plen", | |
3868 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3869 | .maxlen = sizeof(int), | |
3870 | .mode = 0644, | |
3871 | .proc_handler = &proc_dointvec, | |
3872 | }, | |
3873 | #endif | |
930d6ff2 | 3874 | #endif |
fbea49e1 YH |
3875 | { |
3876 | .ctl_name = NET_IPV6_PROXY_NDP, | |
3877 | .procname = "proxy_ndp", | |
3878 | .data = &ipv6_devconf.proxy_ndp, | |
3879 | .maxlen = sizeof(int), | |
3880 | .mode = 0644, | |
3881 | .proc_handler = &proc_dointvec, | |
3882 | }, | |
1da177e4 LT |
3883 | { |
3884 | .ctl_name = 0, /* sentinel */ | |
3885 | } | |
3886 | }, | |
3887 | .addrconf_dev = { | |
3888 | { | |
3889 | .ctl_name = NET_PROTO_CONF_ALL, | |
3890 | .procname = "all", | |
3891 | .mode = 0555, | |
3892 | .child = addrconf_sysctl.addrconf_vars, | |
3893 | }, | |
3894 | { | |
3895 | .ctl_name = 0, /* sentinel */ | |
3896 | } | |
3897 | }, | |
3898 | .addrconf_conf_dir = { | |
3899 | { | |
3900 | .ctl_name = NET_IPV6_CONF, | |
3901 | .procname = "conf", | |
3902 | .mode = 0555, | |
3903 | .child = addrconf_sysctl.addrconf_dev, | |
3904 | }, | |
3905 | { | |
3906 | .ctl_name = 0, /* sentinel */ | |
3907 | } | |
3908 | }, | |
3909 | .addrconf_proto_dir = { | |
3910 | { | |
3911 | .ctl_name = NET_IPV6, | |
3912 | .procname = "ipv6", | |
3913 | .mode = 0555, | |
3914 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3915 | }, | |
3916 | { | |
3917 | .ctl_name = 0, /* sentinel */ | |
3918 | } | |
3919 | }, | |
3920 | .addrconf_root_dir = { | |
3921 | { | |
3922 | .ctl_name = CTL_NET, | |
3923 | .procname = "net", | |
3924 | .mode = 0555, | |
3925 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3926 | }, | |
3927 | { | |
3928 | .ctl_name = 0, /* sentinel */ | |
3929 | } | |
3930 | }, | |
3931 | }; | |
3932 | ||
3933 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3934 | { | |
3935 | int i; | |
3936 | struct net_device *dev = idev ? idev->dev : NULL; | |
3937 | struct addrconf_sysctl_table *t; | |
3938 | char *dev_name = NULL; | |
3939 | ||
af879cc7 | 3940 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
3941 | if (t == NULL) |
3942 | return; | |
1da177e4 LT |
3943 | for (i=0; t->addrconf_vars[i].data; i++) { |
3944 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 LT |
3945 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
3946 | } | |
3947 | if (dev) { | |
1ab1457c | 3948 | dev_name = dev->name; |
1da177e4 LT |
3949 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
3950 | } else { | |
3951 | dev_name = "default"; | |
3952 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3953 | } | |
3954 | ||
1ab1457c YH |
3955 | /* |
3956 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
3957 | * by sysctl and we wouldn't want anyone to change it under our feet |
3958 | * (see SIOCSIFNAME). | |
1ab1457c | 3959 | */ |
543537bd | 3960 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3961 | if (!dev_name) |
3962 | goto free; | |
3963 | ||
3964 | t->addrconf_dev[0].procname = dev_name; | |
3965 | ||
3966 | t->addrconf_dev[0].child = t->addrconf_vars; | |
1da177e4 | 3967 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
1da177e4 | 3968 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
1da177e4 | 3969 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
1da177e4 | 3970 | |
0b4d4147 | 3971 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); |
1da177e4 LT |
3972 | if (t->sysctl_header == NULL) |
3973 | goto free_procname; | |
3974 | else | |
3975 | p->sysctl = t; | |
3976 | return; | |
3977 | ||
3978 | /* error path */ | |
3979 | free_procname: | |
3980 | kfree(dev_name); | |
3981 | free: | |
3982 | kfree(t); | |
3983 | ||
3984 | return; | |
3985 | } | |
3986 | ||
3987 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3988 | { | |
3989 | if (p->sysctl) { | |
3990 | struct addrconf_sysctl_table *t = p->sysctl; | |
3991 | p->sysctl = NULL; | |
3992 | unregister_sysctl_table(t->sysctl_header); | |
3993 | kfree(t->addrconf_dev[0].procname); | |
3994 | kfree(t); | |
3995 | } | |
3996 | } | |
3997 | ||
3998 | ||
3999 | #endif | |
4000 | ||
4001 | /* | |
4002 | * Device notifier | |
4003 | */ | |
4004 | ||
4005 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4006 | { | |
1ab1457c | 4007 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4008 | } |
4009 | ||
4010 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
4011 | { | |
1ab1457c | 4012 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4013 | } |
4014 | ||
4015 | /* | |
4016 | * Init / cleanup code | |
4017 | */ | |
4018 | ||
4019 | int __init addrconf_init(void) | |
4020 | { | |
4021 | int err = 0; | |
4022 | ||
4023 | /* The addrconf netdev notifier requires that loopback_dev | |
4024 | * has it's ipv6 private information allocated and setup | |
4025 | * before it can bring up and give link-local addresses | |
4026 | * to other devices which are up. | |
4027 | * | |
4028 | * Unfortunately, loopback_dev is not necessarily the first | |
4029 | * entry in the global dev_base list of net devices. In fact, | |
4030 | * it is likely to be the very last entry on that list. | |
4031 | * So this causes the notifier registry below to try and | |
4032 | * give link-local addresses to all devices besides loopback_dev | |
4033 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4034 | * devices to fail to get a link-local address. | |
4035 | * | |
4036 | * So, as a temporary fix, allocate the ipv6 structure for | |
4037 | * loopback_dev first by hand. | |
4038 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4039 | * device and it being up should be removed. | |
4040 | */ | |
4041 | rtnl_lock(); | |
4042 | if (!ipv6_add_dev(&loopback_dev)) | |
4043 | err = -ENOMEM; | |
4044 | rtnl_unlock(); | |
4045 | if (err) | |
4046 | return err; | |
4047 | ||
c62dba90 HX |
4048 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4049 | ||
1da177e4 LT |
4050 | register_netdevice_notifier(&ipv6_dev_notf); |
4051 | ||
1da177e4 LT |
4052 | addrconf_verify(0); |
4053 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4054 | #ifdef CONFIG_SYSCTL | |
4055 | addrconf_sysctl.sysctl_header = | |
0b4d4147 | 4056 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir); |
1da177e4 LT |
4057 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
4058 | #endif | |
4059 | ||
4060 | return 0; | |
4061 | } | |
4062 | ||
4063 | void __exit addrconf_cleanup(void) | |
4064 | { | |
1ab1457c YH |
4065 | struct net_device *dev; |
4066 | struct inet6_dev *idev; | |
4067 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
4068 | int i; |
4069 | ||
4070 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4071 | ||
4072 | rtnetlink_links[PF_INET6] = NULL; | |
4073 | #ifdef CONFIG_SYSCTL | |
4074 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4075 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4076 | #endif | |
4077 | ||
4078 | rtnl_lock(); | |
4079 | ||
4080 | /* | |
4081 | * clean dev list. | |
4082 | */ | |
4083 | ||
4084 | for (dev=dev_base; dev; dev=dev->next) { | |
4085 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4086 | continue; | |
4087 | addrconf_ifdown(dev, 1); | |
4088 | } | |
4089 | addrconf_ifdown(&loopback_dev, 2); | |
4090 | ||
4091 | /* | |
4092 | * Check hash table. | |
4093 | */ | |
4094 | ||
4095 | write_lock_bh(&addrconf_hash_lock); | |
4096 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4097 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4098 | struct inet6_ifaddr *bifa; | |
4099 | ||
4100 | bifa = ifa; | |
4101 | ifa = ifa->lst_next; | |
4102 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4103 | /* Do not free it; something is wrong. | |
4104 | Now we can investigate it with debugger. | |
4105 | */ | |
4106 | } | |
4107 | } | |
4108 | write_unlock_bh(&addrconf_hash_lock); | |
4109 | ||
4110 | del_timer(&addr_chk_timer); | |
4111 | ||
4112 | rtnl_unlock(); | |
4113 | ||
1da177e4 LT |
4114 | #ifdef CONFIG_PROC_FS |
4115 | proc_net_remove("if_inet6"); | |
4116 | #endif | |
4117 | } |