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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
38 | */ | |
39 | ||
40 | #include <linux/config.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/types.h> | |
43 | #include <linux/socket.h> | |
44 | #include <linux/sockios.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/net.h> | |
47 | #include <linux/in6.h> | |
48 | #include <linux/netdevice.h> | |
49 | #include <linux/if_arp.h> | |
50 | #include <linux/if_arcnet.h> | |
51 | #include <linux/if_infiniband.h> | |
52 | #include <linux/route.h> | |
53 | #include <linux/inetdevice.h> | |
54 | #include <linux/init.h> | |
55 | #ifdef CONFIG_SYSCTL | |
56 | #include <linux/sysctl.h> | |
57 | #endif | |
58 | #include <linux/delay.h> | |
59 | #include <linux/notifier.h> | |
543537bd | 60 | #include <linux/string.h> |
1da177e4 LT |
61 | |
62 | #include <net/sock.h> | |
63 | #include <net/snmp.h> | |
64 | ||
65 | #include <net/ipv6.h> | |
66 | #include <net/protocol.h> | |
67 | #include <net/ndisc.h> | |
68 | #include <net/ip6_route.h> | |
69 | #include <net/addrconf.h> | |
70 | #include <net/tcp.h> | |
71 | #include <net/ip.h> | |
72 | #include <linux/if_tunnel.h> | |
73 | #include <linux/rtnetlink.h> | |
74 | ||
75 | #ifdef CONFIG_IPV6_PRIVACY | |
76 | #include <linux/random.h> | |
77 | #include <linux/crypto.h> | |
78 | #include <asm/scatterlist.h> | |
79 | #endif | |
80 | ||
81 | #include <asm/uaccess.h> | |
82 | ||
83 | #include <linux/proc_fs.h> | |
84 | #include <linux/seq_file.h> | |
85 | ||
86 | /* Set to 3 to get tracing... */ | |
87 | #define ACONF_DEBUG 2 | |
88 | ||
89 | #if ACONF_DEBUG >= 3 | |
90 | #define ADBG(x) printk x | |
91 | #else | |
92 | #define ADBG(x) | |
93 | #endif | |
94 | ||
95 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
96 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
97 | ||
98 | #ifdef CONFIG_SYSCTL | |
99 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
100 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
101 | #endif | |
102 | ||
103 | #ifdef CONFIG_IPV6_PRIVACY | |
104 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
105 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
106 | static void ipv6_regen_rndid(unsigned long data); | |
107 | ||
108 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
109 | static struct crypto_tfm *md5_tfm; | |
110 | static DEFINE_SPINLOCK(md5_tfm_lock); | |
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 | ||
121 | /* Protects inet6 devices */ | |
122 | DEFINE_RWLOCK(addrconf_lock); | |
123 | ||
124 | static void addrconf_verify(unsigned long); | |
125 | ||
8d06afab | 126 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
127 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
128 | ||
129 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
130 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
131 | ||
132 | static int addrconf_ifdown(struct net_device *dev, int how); | |
133 | ||
e431b8c0 | 134 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
135 | static void addrconf_dad_timer(unsigned long data); |
136 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
137 | static void addrconf_rs_timer(unsigned long data); | |
138 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
140 | ||
141 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
142 | struct prefix_info *pinfo); | |
143 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
144 | ||
145 | static struct notifier_block *inet6addr_chain; | |
146 | ||
147 | struct ipv6_devconf ipv6_devconf = { | |
148 | .forwarding = 0, | |
149 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
150 | .mtu6 = IPV6_MIN_MTU, | |
151 | .accept_ra = 1, | |
152 | .accept_redirects = 1, | |
153 | .autoconf = 1, | |
154 | .force_mld_version = 0, | |
155 | .dad_transmits = 1, | |
156 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
157 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
158 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
159 | #ifdef CONFIG_IPV6_PRIVACY | |
160 | .use_tempaddr = 0, | |
161 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
162 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
163 | .regen_max_retry = REGEN_MAX_RETRY, | |
164 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
165 | #endif | |
166 | .max_addresses = IPV6_MAX_ADDRESSES, | |
167 | }; | |
168 | ||
169 | static struct ipv6_devconf ipv6_devconf_dflt = { | |
170 | .forwarding = 0, | |
171 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
172 | .mtu6 = IPV6_MIN_MTU, | |
173 | .accept_ra = 1, | |
174 | .accept_redirects = 1, | |
175 | .autoconf = 1, | |
176 | .dad_transmits = 1, | |
177 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
178 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
179 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
180 | #ifdef CONFIG_IPV6_PRIVACY | |
181 | .use_tempaddr = 0, | |
182 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
183 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
184 | .regen_max_retry = REGEN_MAX_RETRY, | |
185 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
186 | #endif | |
187 | .max_addresses = IPV6_MAX_ADDRESSES, | |
188 | }; | |
189 | ||
190 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
191 | #if 0 | |
192 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
193 | #endif | |
194 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
195 | ||
196 | int ipv6_addr_type(const struct in6_addr *addr) | |
197 | { | |
198 | int type; | |
199 | u32 st; | |
200 | ||
201 | st = addr->s6_addr32[0]; | |
202 | ||
203 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { | |
204 | type = IPV6_ADDR_MULTICAST; | |
205 | ||
206 | switch((st & htonl(0x00FF0000))) { | |
207 | case __constant_htonl(0x00010000): | |
208 | type |= IPV6_ADDR_LOOPBACK; | |
209 | break; | |
210 | ||
211 | case __constant_htonl(0x00020000): | |
212 | type |= IPV6_ADDR_LINKLOCAL; | |
213 | break; | |
214 | ||
215 | case __constant_htonl(0x00050000): | |
216 | type |= IPV6_ADDR_SITELOCAL; | |
217 | break; | |
218 | }; | |
219 | return type; | |
220 | } | |
221 | ||
222 | type = IPV6_ADDR_UNICAST; | |
223 | ||
224 | /* Consider all addresses with the first three bits different of | |
225 | 000 and 111 as finished. | |
226 | */ | |
227 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
228 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
229 | return type; | |
230 | ||
231 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
232 | return (IPV6_ADDR_LINKLOCAL | type); | |
233 | ||
234 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) | |
235 | return (IPV6_ADDR_SITELOCAL | type); | |
236 | ||
237 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
238 | if (addr->s6_addr32[2] == 0) { | |
239 | if (addr->s6_addr32[3] == 0) | |
240 | return IPV6_ADDR_ANY; | |
241 | ||
242 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
243 | return (IPV6_ADDR_LOOPBACK | type); | |
244 | ||
245 | return (IPV6_ADDR_COMPATv4 | type); | |
246 | } | |
247 | ||
248 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
249 | return IPV6_ADDR_MAPPED; | |
250 | } | |
251 | ||
252 | st &= htonl(0xFF000000); | |
253 | if (st == 0) | |
254 | return IPV6_ADDR_RESERVED; | |
255 | st &= htonl(0xFE000000); | |
256 | if (st == htonl(0x02000000)) | |
257 | return IPV6_ADDR_RESERVED; /* for NSAP */ | |
258 | if (st == htonl(0x04000000)) | |
259 | return IPV6_ADDR_RESERVED; /* for IPX */ | |
260 | return type; | |
261 | } | |
262 | ||
263 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) | |
264 | { | |
265 | if (del_timer(&ifp->timer)) | |
266 | __in6_ifa_put(ifp); | |
267 | } | |
268 | ||
269 | enum addrconf_timer_t | |
270 | { | |
271 | AC_NONE, | |
272 | AC_DAD, | |
273 | AC_RS, | |
274 | }; | |
275 | ||
276 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
277 | enum addrconf_timer_t what, | |
278 | unsigned long when) | |
279 | { | |
280 | if (!del_timer(&ifp->timer)) | |
281 | in6_ifa_hold(ifp); | |
282 | ||
283 | switch (what) { | |
284 | case AC_DAD: | |
285 | ifp->timer.function = addrconf_dad_timer; | |
286 | break; | |
287 | case AC_RS: | |
288 | ifp->timer.function = addrconf_rs_timer; | |
289 | break; | |
290 | default:; | |
291 | } | |
292 | ifp->timer.expires = jiffies + when; | |
293 | add_timer(&ifp->timer); | |
294 | } | |
295 | ||
296 | /* Nobody refers to this device, we may destroy it. */ | |
297 | ||
298 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
299 | { | |
300 | struct net_device *dev = idev->dev; | |
301 | BUG_TRAP(idev->addr_list==NULL); | |
302 | BUG_TRAP(idev->mc_list==NULL); | |
303 | #ifdef NET_REFCNT_DEBUG | |
304 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
305 | #endif | |
306 | dev_put(dev); | |
307 | if (!idev->dead) { | |
308 | printk("Freeing alive inet6 device %p\n", idev); | |
309 | return; | |
310 | } | |
311 | snmp6_free_dev(idev); | |
312 | kfree(idev); | |
313 | } | |
314 | ||
315 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
316 | { | |
317 | struct inet6_dev *ndev; | |
318 | ||
319 | ASSERT_RTNL(); | |
320 | ||
321 | if (dev->mtu < IPV6_MIN_MTU) | |
322 | return NULL; | |
323 | ||
324 | ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL); | |
325 | ||
326 | if (ndev) { | |
327 | memset(ndev, 0, sizeof(struct inet6_dev)); | |
328 | ||
329 | rwlock_init(&ndev->lock); | |
330 | ndev->dev = dev; | |
331 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
332 | ndev->cnf.mtu6 = dev->mtu; | |
333 | ndev->cnf.sysctl = NULL; | |
334 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
335 | if (ndev->nd_parms == NULL) { | |
336 | kfree(ndev); | |
337 | return NULL; | |
338 | } | |
339 | /* We refer to the device */ | |
340 | dev_hold(dev); | |
341 | ||
342 | if (snmp6_alloc_dev(ndev) < 0) { | |
343 | ADBG((KERN_WARNING | |
344 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
345 | __FUNCTION__, dev->name)); | |
346 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
347 | ndev->dead = 1; | |
348 | in6_dev_finish_destroy(ndev); | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | if (snmp6_register_dev(ndev) < 0) { | |
353 | ADBG((KERN_WARNING | |
354 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
355 | __FUNCTION__, dev->name)); | |
356 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
357 | ndev->dead = 1; | |
358 | in6_dev_finish_destroy(ndev); | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | /* One reference from device. We must do this before | |
363 | * we invoke __ipv6_regen_rndid(). | |
364 | */ | |
365 | in6_dev_hold(ndev); | |
366 | ||
367 | #ifdef CONFIG_IPV6_PRIVACY | |
368 | get_random_bytes(ndev->rndid, sizeof(ndev->rndid)); | |
369 | get_random_bytes(ndev->entropy, sizeof(ndev->entropy)); | |
370 | init_timer(&ndev->regen_timer); | |
371 | ndev->regen_timer.function = ipv6_regen_rndid; | |
372 | ndev->regen_timer.data = (unsigned long) ndev; | |
373 | if ((dev->flags&IFF_LOOPBACK) || | |
374 | dev->type == ARPHRD_TUNNEL || | |
77bd9196 | 375 | dev->type == ARPHRD_NONE || |
1da177e4 LT |
376 | dev->type == ARPHRD_SIT) { |
377 | printk(KERN_INFO | |
378 | "Disabled Privacy Extensions on device %p(%s)\n", | |
379 | dev, dev->name); | |
380 | ndev->cnf.use_tempaddr = -1; | |
381 | } else { | |
382 | in6_dev_hold(ndev); | |
383 | ipv6_regen_rndid((unsigned long) ndev); | |
384 | } | |
385 | #endif | |
386 | ||
387 | write_lock_bh(&addrconf_lock); | |
388 | dev->ip6_ptr = ndev; | |
389 | write_unlock_bh(&addrconf_lock); | |
390 | ||
391 | ipv6_mc_init_dev(ndev); | |
392 | ndev->tstamp = jiffies; | |
393 | #ifdef CONFIG_SYSCTL | |
394 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, | |
395 | NET_IPV6_NEIGH, "ipv6", | |
396 | &ndisc_ifinfo_sysctl_change, | |
397 | NULL); | |
398 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
399 | #endif | |
400 | } | |
401 | return ndev; | |
402 | } | |
403 | ||
404 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
405 | { | |
406 | struct inet6_dev *idev; | |
407 | ||
408 | ASSERT_RTNL(); | |
409 | ||
410 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
411 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
412 | return NULL; | |
413 | } | |
414 | if (dev->flags&IFF_UP) | |
415 | ipv6_mc_up(idev); | |
416 | return idev; | |
417 | } | |
418 | ||
419 | #ifdef CONFIG_SYSCTL | |
420 | static void dev_forward_change(struct inet6_dev *idev) | |
421 | { | |
422 | struct net_device *dev; | |
423 | struct inet6_ifaddr *ifa; | |
424 | struct in6_addr addr; | |
425 | ||
426 | if (!idev) | |
427 | return; | |
428 | dev = idev->dev; | |
429 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
430 | ipv6_addr_all_routers(&addr); | |
431 | ||
432 | if (idev->cnf.forwarding) | |
433 | ipv6_dev_mc_inc(dev, &addr); | |
434 | else | |
435 | ipv6_dev_mc_dec(dev, &addr); | |
436 | } | |
437 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
438 | if (idev->cnf.forwarding) | |
439 | addrconf_join_anycast(ifa); | |
440 | else | |
441 | addrconf_leave_anycast(ifa); | |
442 | } | |
443 | } | |
444 | ||
445 | ||
446 | static void addrconf_forward_change(void) | |
447 | { | |
448 | struct net_device *dev; | |
449 | struct inet6_dev *idev; | |
450 | ||
451 | read_lock(&dev_base_lock); | |
452 | for (dev=dev_base; dev; dev=dev->next) { | |
453 | read_lock(&addrconf_lock); | |
454 | idev = __in6_dev_get(dev); | |
455 | if (idev) { | |
456 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
457 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
458 | if (changed) | |
459 | dev_forward_change(idev); | |
460 | } | |
461 | read_unlock(&addrconf_lock); | |
462 | } | |
463 | read_unlock(&dev_base_lock); | |
464 | } | |
465 | #endif | |
466 | ||
467 | /* Nobody refers to this ifaddr, destroy it */ | |
468 | ||
469 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
470 | { | |
471 | BUG_TRAP(ifp->if_next==NULL); | |
472 | BUG_TRAP(ifp->lst_next==NULL); | |
473 | #ifdef NET_REFCNT_DEBUG | |
474 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
475 | #endif | |
476 | ||
477 | in6_dev_put(ifp->idev); | |
478 | ||
479 | if (del_timer(&ifp->timer)) | |
480 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
481 | ||
482 | if (!ifp->dead) { | |
483 | printk("Freeing alive inet6 address %p\n", ifp); | |
484 | return; | |
485 | } | |
486 | dst_release(&ifp->rt->u.dst); | |
487 | ||
488 | kfree(ifp); | |
489 | } | |
490 | ||
491 | /* On success it returns ifp with increased reference count */ | |
492 | ||
493 | static struct inet6_ifaddr * | |
494 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 495 | int scope, u32 flags) |
1da177e4 LT |
496 | { |
497 | struct inet6_ifaddr *ifa = NULL; | |
498 | struct rt6_info *rt; | |
499 | int hash; | |
500 | int err = 0; | |
501 | ||
502 | read_lock_bh(&addrconf_lock); | |
503 | if (idev->dead) { | |
504 | err = -ENODEV; /*XXX*/ | |
505 | goto out2; | |
506 | } | |
507 | ||
508 | write_lock(&addrconf_hash_lock); | |
509 | ||
510 | /* Ignore adding duplicate addresses on an interface */ | |
511 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
512 | ADBG(("ipv6_add_addr: already assigned\n")); | |
513 | err = -EEXIST; | |
514 | goto out; | |
515 | } | |
516 | ||
517 | ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); | |
518 | ||
519 | if (ifa == NULL) { | |
520 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
521 | err = -ENOBUFS; | |
522 | goto out; | |
523 | } | |
524 | ||
525 | rt = addrconf_dst_alloc(idev, addr, 0); | |
526 | if (IS_ERR(rt)) { | |
527 | err = PTR_ERR(rt); | |
528 | goto out; | |
529 | } | |
530 | ||
531 | memset(ifa, 0, sizeof(struct inet6_ifaddr)); | |
532 | ipv6_addr_copy(&ifa->addr, addr); | |
533 | ||
534 | spin_lock_init(&ifa->lock); | |
535 | init_timer(&ifa->timer); | |
536 | ifa->timer.data = (unsigned long) ifa; | |
537 | ifa->scope = scope; | |
538 | ifa->prefix_len = pfxlen; | |
539 | ifa->flags = flags | IFA_F_TENTATIVE; | |
540 | ifa->cstamp = ifa->tstamp = jiffies; | |
541 | ||
542 | ifa->idev = idev; | |
543 | in6_dev_hold(idev); | |
544 | /* For caller */ | |
545 | in6_ifa_hold(ifa); | |
546 | ||
547 | /* Add to big hash table */ | |
548 | hash = ipv6_addr_hash(addr); | |
549 | ||
550 | ifa->lst_next = inet6_addr_lst[hash]; | |
551 | inet6_addr_lst[hash] = ifa; | |
552 | in6_ifa_hold(ifa); | |
553 | write_unlock(&addrconf_hash_lock); | |
554 | ||
555 | write_lock(&idev->lock); | |
556 | /* Add to inet6_dev unicast addr list. */ | |
557 | ifa->if_next = idev->addr_list; | |
558 | idev->addr_list = ifa; | |
559 | ||
560 | #ifdef CONFIG_IPV6_PRIVACY | |
561 | if (ifa->flags&IFA_F_TEMPORARY) { | |
562 | ifa->tmp_next = idev->tempaddr_list; | |
563 | idev->tempaddr_list = ifa; | |
564 | in6_ifa_hold(ifa); | |
565 | } | |
566 | #endif | |
567 | ||
568 | ifa->rt = rt; | |
569 | ||
570 | in6_ifa_hold(ifa); | |
571 | write_unlock(&idev->lock); | |
572 | out2: | |
573 | read_unlock_bh(&addrconf_lock); | |
574 | ||
fd92833a | 575 | if (likely(err == 0)) |
1da177e4 LT |
576 | notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
577 | else { | |
578 | kfree(ifa); | |
579 | ifa = ERR_PTR(err); | |
580 | } | |
581 | ||
582 | return ifa; | |
583 | out: | |
584 | write_unlock(&addrconf_hash_lock); | |
585 | goto out2; | |
586 | } | |
587 | ||
588 | /* This function wants to get referenced ifp and releases it before return */ | |
589 | ||
590 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
591 | { | |
592 | struct inet6_ifaddr *ifa, **ifap; | |
593 | struct inet6_dev *idev = ifp->idev; | |
594 | int hash; | |
595 | int deleted = 0, onlink = 0; | |
596 | unsigned long expires = jiffies; | |
597 | ||
598 | hash = ipv6_addr_hash(&ifp->addr); | |
599 | ||
600 | ifp->dead = 1; | |
601 | ||
602 | write_lock_bh(&addrconf_hash_lock); | |
603 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
604 | ifap = &ifa->lst_next) { | |
605 | if (ifa == ifp) { | |
606 | *ifap = ifa->lst_next; | |
607 | __in6_ifa_put(ifp); | |
608 | ifa->lst_next = NULL; | |
609 | break; | |
610 | } | |
611 | } | |
612 | write_unlock_bh(&addrconf_hash_lock); | |
613 | ||
614 | write_lock_bh(&idev->lock); | |
615 | #ifdef CONFIG_IPV6_PRIVACY | |
616 | if (ifp->flags&IFA_F_TEMPORARY) { | |
617 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
618 | ifap = &ifa->tmp_next) { | |
619 | if (ifa == ifp) { | |
620 | *ifap = ifa->tmp_next; | |
621 | if (ifp->ifpub) { | |
622 | in6_ifa_put(ifp->ifpub); | |
623 | ifp->ifpub = NULL; | |
624 | } | |
625 | __in6_ifa_put(ifp); | |
626 | ifa->tmp_next = NULL; | |
627 | break; | |
628 | } | |
629 | } | |
630 | } | |
631 | #endif | |
632 | ||
633 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL; | |
634 | ifap = &ifa->if_next) { | |
635 | if (ifa == ifp) { | |
636 | *ifap = ifa->if_next; | |
637 | __in6_ifa_put(ifp); | |
638 | ifa->if_next = NULL; | |
639 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
640 | break; | |
641 | deleted = 1; | |
642 | } else if (ifp->flags & IFA_F_PERMANENT) { | |
643 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
644 | ifp->prefix_len)) { | |
645 | if (ifa->flags & IFA_F_PERMANENT) { | |
646 | onlink = 1; | |
647 | if (deleted) | |
648 | break; | |
649 | } else { | |
650 | unsigned long lifetime; | |
651 | ||
652 | if (!onlink) | |
653 | onlink = -1; | |
654 | ||
655 | spin_lock(&ifa->lock); | |
656 | lifetime = min_t(unsigned long, | |
657 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
658 | if (time_before(expires, | |
659 | ifa->tstamp + lifetime * HZ)) | |
660 | expires = ifa->tstamp + lifetime * HZ; | |
661 | spin_unlock(&ifa->lock); | |
662 | } | |
663 | } | |
664 | } | |
665 | } | |
666 | write_unlock_bh(&idev->lock); | |
667 | ||
668 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
669 | ||
670 | notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp); | |
671 | ||
672 | addrconf_del_timer(ifp); | |
673 | ||
674 | /* | |
675 | * Purge or update corresponding prefix | |
676 | * | |
677 | * 1) we don't purge prefix here if address was not permanent. | |
678 | * prefix is managed by its own lifetime. | |
679 | * 2) if there're no addresses, delete prefix. | |
680 | * 3) if there're still other permanent address(es), | |
681 | * corresponding prefix is still permanent. | |
682 | * 4) otherwise, update prefix lifetime to the | |
683 | * longest valid lifetime among the corresponding | |
684 | * addresses on the device. | |
685 | * Note: subsequent RA will update lifetime. | |
686 | * | |
687 | * --yoshfuji | |
688 | */ | |
689 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
690 | struct in6_addr prefix; | |
691 | struct rt6_info *rt; | |
692 | ||
693 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
694 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
695 | ||
696 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
697 | if (onlink == 0) { | |
0d51aa80 | 698 | ip6_del_rt(rt, NULL, NULL, NULL); |
1da177e4 LT |
699 | rt = NULL; |
700 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
701 | rt->rt6i_expires = expires; | |
702 | rt->rt6i_flags |= RTF_EXPIRES; | |
703 | } | |
704 | } | |
705 | dst_release(&rt->u.dst); | |
706 | } | |
707 | ||
708 | in6_ifa_put(ifp); | |
709 | } | |
710 | ||
711 | #ifdef CONFIG_IPV6_PRIVACY | |
712 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
713 | { | |
714 | struct inet6_dev *idev = ifp->idev; | |
715 | struct in6_addr addr, *tmpaddr; | |
716 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
717 | int tmp_plen; | |
718 | int ret = 0; | |
719 | int max_addresses; | |
720 | ||
721 | write_lock(&idev->lock); | |
722 | if (ift) { | |
723 | spin_lock_bh(&ift->lock); | |
724 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
725 | spin_unlock_bh(&ift->lock); | |
726 | tmpaddr = &addr; | |
727 | } else { | |
728 | tmpaddr = NULL; | |
729 | } | |
730 | retry: | |
731 | in6_dev_hold(idev); | |
732 | if (idev->cnf.use_tempaddr <= 0) { | |
733 | write_unlock(&idev->lock); | |
734 | printk(KERN_INFO | |
735 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
736 | in6_dev_put(idev); | |
737 | ret = -1; | |
738 | goto out; | |
739 | } | |
740 | spin_lock_bh(&ifp->lock); | |
741 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
742 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
743 | spin_unlock_bh(&ifp->lock); | |
744 | write_unlock(&idev->lock); | |
745 | printk(KERN_WARNING | |
746 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
747 | in6_dev_put(idev); | |
748 | ret = -1; | |
749 | goto out; | |
750 | } | |
751 | in6_ifa_hold(ifp); | |
752 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
753 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
754 | spin_unlock_bh(&ifp->lock); | |
755 | write_unlock(&idev->lock); | |
756 | printk(KERN_WARNING | |
757 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
758 | in6_ifa_put(ifp); | |
759 | in6_dev_put(idev); | |
760 | ret = -1; | |
761 | goto out; | |
762 | } | |
763 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
764 | tmp_valid_lft = min_t(__u32, | |
765 | ifp->valid_lft, | |
766 | idev->cnf.temp_valid_lft); | |
767 | tmp_prefered_lft = min_t(__u32, | |
768 | ifp->prefered_lft, | |
769 | idev->cnf.temp_prefered_lft - desync_factor / HZ); | |
770 | tmp_plen = ifp->prefix_len; | |
771 | max_addresses = idev->cnf.max_addresses; | |
772 | tmp_cstamp = ifp->cstamp; | |
773 | tmp_tstamp = ifp->tstamp; | |
774 | spin_unlock_bh(&ifp->lock); | |
775 | ||
776 | write_unlock(&idev->lock); | |
777 | ift = !max_addresses || | |
778 | ipv6_count_addresses(idev) < max_addresses ? | |
779 | ipv6_add_addr(idev, &addr, tmp_plen, | |
780 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
781 | if (!ift || IS_ERR(ift)) { | |
782 | in6_ifa_put(ifp); | |
783 | in6_dev_put(idev); | |
784 | printk(KERN_INFO | |
785 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
786 | tmpaddr = &addr; | |
787 | write_lock(&idev->lock); | |
788 | goto retry; | |
789 | } | |
790 | ||
791 | spin_lock_bh(&ift->lock); | |
792 | ift->ifpub = ifp; | |
793 | ift->valid_lft = tmp_valid_lft; | |
794 | ift->prefered_lft = tmp_prefered_lft; | |
795 | ift->cstamp = tmp_cstamp; | |
796 | ift->tstamp = tmp_tstamp; | |
797 | spin_unlock_bh(&ift->lock); | |
798 | ||
799 | addrconf_dad_start(ift, 0); | |
800 | in6_ifa_put(ift); | |
801 | in6_dev_put(idev); | |
802 | out: | |
803 | return ret; | |
804 | } | |
805 | #endif | |
806 | ||
807 | /* | |
808 | * Choose an appropriate source address | |
809 | * should do: | |
810 | * i) get an address with an appropriate scope | |
811 | * ii) see if there is a specific route for the destination and use | |
812 | * an address of the attached interface | |
813 | * iii) don't use deprecated addresses | |
814 | */ | |
815 | static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref) | |
816 | { | |
817 | int pref; | |
818 | pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2; | |
819 | #ifdef CONFIG_IPV6_PRIVACY | |
820 | pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1; | |
821 | #endif | |
822 | return pref; | |
823 | } | |
824 | ||
825 | #ifdef CONFIG_IPV6_PRIVACY | |
826 | #define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3) | |
827 | #else | |
828 | #define IPV6_GET_SADDR_MAXSCORE(score) (score) | |
829 | #endif | |
830 | ||
831 | int ipv6_dev_get_saddr(struct net_device *dev, | |
832 | struct in6_addr *daddr, struct in6_addr *saddr) | |
833 | { | |
834 | struct inet6_ifaddr *ifp = NULL; | |
835 | struct inet6_ifaddr *match = NULL; | |
836 | struct inet6_dev *idev; | |
837 | int scope; | |
838 | int err; | |
839 | int hiscore = -1, score; | |
840 | ||
841 | scope = ipv6_addr_scope(daddr); | |
842 | ||
843 | /* | |
844 | * known dev | |
845 | * search dev and walk through dev addresses | |
846 | */ | |
847 | ||
848 | if (dev) { | |
849 | if (dev->flags & IFF_LOOPBACK) | |
850 | scope = IFA_HOST; | |
851 | ||
852 | read_lock(&addrconf_lock); | |
853 | idev = __in6_dev_get(dev); | |
854 | if (idev) { | |
855 | read_lock_bh(&idev->lock); | |
856 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
857 | if (ifp->scope == scope) { | |
858 | if (ifp->flags&IFA_F_TENTATIVE) | |
859 | continue; | |
860 | #ifdef CONFIG_IPV6_PRIVACY | |
861 | score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0); | |
862 | #else | |
863 | score = ipv6_saddr_pref(ifp, 0); | |
864 | #endif | |
865 | if (score <= hiscore) | |
866 | continue; | |
867 | ||
868 | if (match) | |
869 | in6_ifa_put(match); | |
870 | match = ifp; | |
871 | hiscore = score; | |
872 | in6_ifa_hold(ifp); | |
873 | ||
874 | if (IPV6_GET_SADDR_MAXSCORE(score)) { | |
875 | read_unlock_bh(&idev->lock); | |
876 | read_unlock(&addrconf_lock); | |
877 | goto out; | |
878 | } | |
879 | } | |
880 | } | |
881 | read_unlock_bh(&idev->lock); | |
882 | } | |
883 | read_unlock(&addrconf_lock); | |
884 | } | |
885 | ||
886 | if (scope == IFA_LINK) | |
887 | goto out; | |
888 | ||
889 | /* | |
890 | * dev == NULL or search failed for specified dev | |
891 | */ | |
892 | ||
893 | read_lock(&dev_base_lock); | |
894 | read_lock(&addrconf_lock); | |
895 | for (dev = dev_base; dev; dev=dev->next) { | |
896 | idev = __in6_dev_get(dev); | |
897 | if (idev) { | |
898 | read_lock_bh(&idev->lock); | |
899 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
900 | if (ifp->scope == scope) { | |
901 | if (ifp->flags&IFA_F_TENTATIVE) | |
902 | continue; | |
903 | #ifdef CONFIG_IPV6_PRIVACY | |
904 | score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0); | |
905 | #else | |
906 | score = ipv6_saddr_pref(ifp, 0); | |
907 | #endif | |
908 | if (score <= hiscore) | |
909 | continue; | |
910 | ||
911 | if (match) | |
912 | in6_ifa_put(match); | |
913 | match = ifp; | |
914 | hiscore = score; | |
915 | in6_ifa_hold(ifp); | |
916 | ||
917 | if (IPV6_GET_SADDR_MAXSCORE(score)) { | |
918 | read_unlock_bh(&idev->lock); | |
919 | goto out_unlock_base; | |
920 | } | |
921 | } | |
922 | } | |
923 | read_unlock_bh(&idev->lock); | |
924 | } | |
925 | } | |
926 | ||
927 | out_unlock_base: | |
928 | read_unlock(&addrconf_lock); | |
929 | read_unlock(&dev_base_lock); | |
930 | ||
931 | out: | |
932 | err = -EADDRNOTAVAIL; | |
933 | if (match) { | |
934 | ipv6_addr_copy(saddr, &match->addr); | |
935 | err = 0; | |
936 | in6_ifa_put(match); | |
937 | } | |
938 | ||
939 | return err; | |
940 | } | |
941 | ||
942 | ||
943 | int ipv6_get_saddr(struct dst_entry *dst, | |
944 | struct in6_addr *daddr, struct in6_addr *saddr) | |
945 | { | |
946 | return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr); | |
947 | } | |
948 | ||
949 | ||
950 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
951 | { | |
952 | struct inet6_dev *idev; | |
953 | int err = -EADDRNOTAVAIL; | |
954 | ||
955 | read_lock(&addrconf_lock); | |
956 | if ((idev = __in6_dev_get(dev)) != NULL) { | |
957 | struct inet6_ifaddr *ifp; | |
958 | ||
959 | read_lock_bh(&idev->lock); | |
960 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
961 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
962 | ipv6_addr_copy(addr, &ifp->addr); | |
963 | err = 0; | |
964 | break; | |
965 | } | |
966 | } | |
967 | read_unlock_bh(&idev->lock); | |
968 | } | |
969 | read_unlock(&addrconf_lock); | |
970 | return err; | |
971 | } | |
972 | ||
973 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
974 | { | |
975 | int cnt = 0; | |
976 | struct inet6_ifaddr *ifp; | |
977 | ||
978 | read_lock_bh(&idev->lock); | |
979 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
980 | cnt++; | |
981 | read_unlock_bh(&idev->lock); | |
982 | return cnt; | |
983 | } | |
984 | ||
985 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
986 | { | |
987 | struct inet6_ifaddr * ifp; | |
988 | u8 hash = ipv6_addr_hash(addr); | |
989 | ||
990 | read_lock_bh(&addrconf_hash_lock); | |
991 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
992 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
993 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
994 | if (dev == NULL || ifp->idev->dev == dev || | |
995 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
996 | break; | |
997 | } | |
998 | } | |
999 | read_unlock_bh(&addrconf_hash_lock); | |
1000 | return ifp != NULL; | |
1001 | } | |
1002 | ||
1003 | static | |
1004 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1005 | { | |
1006 | struct inet6_ifaddr * ifp; | |
1007 | u8 hash = ipv6_addr_hash(addr); | |
1008 | ||
1009 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1010 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1011 | if (dev == NULL || ifp->idev->dev == dev) | |
1012 | break; | |
1013 | } | |
1014 | } | |
1015 | return ifp != NULL; | |
1016 | } | |
1017 | ||
1018 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1019 | { | |
1020 | struct inet6_ifaddr * ifp; | |
1021 | u8 hash = ipv6_addr_hash(addr); | |
1022 | ||
1023 | read_lock_bh(&addrconf_hash_lock); | |
1024 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1025 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1026 | if (dev == NULL || ifp->idev->dev == dev || | |
1027 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1028 | in6_ifa_hold(ifp); | |
1029 | break; | |
1030 | } | |
1031 | } | |
1032 | } | |
1033 | read_unlock_bh(&addrconf_hash_lock); | |
1034 | ||
1035 | return ifp; | |
1036 | } | |
1037 | ||
1038 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1039 | { | |
1040 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
1041 | const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2); | |
1042 | u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; | |
8feaf0c0 | 1043 | u32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
1da177e4 | 1044 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1045 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1046 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1047 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1048 | ||
1049 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1050 | return 1; | |
1051 | ||
1052 | if (addr_type2 == IPV6_ADDR_ANY && | |
1053 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1054 | return 1; | |
1055 | ||
1056 | if (addr_type == IPV6_ADDR_ANY && | |
1057 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1058 | return 1; | |
1059 | ||
1060 | if (sk2_rcv_saddr6 && | |
1061 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1062 | return 1; | |
1063 | ||
1064 | if (addr_type == IPV6_ADDR_MAPPED && | |
1065 | !sk2_ipv6only && | |
1066 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1067 | return 1; | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | /* Gets referenced address, destroys ifaddr */ | |
1073 | ||
1074 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) | |
1075 | { | |
1076 | if (net_ratelimit()) | |
1077 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1078 | if (ifp->flags&IFA_F_PERMANENT) { | |
1079 | spin_lock_bh(&ifp->lock); | |
1080 | addrconf_del_timer(ifp); | |
1081 | ifp->flags |= IFA_F_TENTATIVE; | |
1082 | spin_unlock_bh(&ifp->lock); | |
1083 | in6_ifa_put(ifp); | |
1084 | #ifdef CONFIG_IPV6_PRIVACY | |
1085 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1086 | struct inet6_ifaddr *ifpub; | |
1087 | spin_lock_bh(&ifp->lock); | |
1088 | ifpub = ifp->ifpub; | |
1089 | if (ifpub) { | |
1090 | in6_ifa_hold(ifpub); | |
1091 | spin_unlock_bh(&ifp->lock); | |
1092 | ipv6_create_tempaddr(ifpub, ifp); | |
1093 | in6_ifa_put(ifpub); | |
1094 | } else { | |
1095 | spin_unlock_bh(&ifp->lock); | |
1096 | } | |
1097 | ipv6_del_addr(ifp); | |
1098 | #endif | |
1099 | } else | |
1100 | ipv6_del_addr(ifp); | |
1101 | } | |
1102 | ||
1103 | ||
1104 | /* Join to solicited addr multicast group. */ | |
1105 | ||
1106 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1107 | { | |
1108 | struct in6_addr maddr; | |
1109 | ||
1110 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1111 | return; | |
1112 | ||
1113 | addrconf_addr_solict_mult(addr, &maddr); | |
1114 | ipv6_dev_mc_inc(dev, &maddr); | |
1115 | } | |
1116 | ||
1117 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1118 | { | |
1119 | struct in6_addr maddr; | |
1120 | ||
1121 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1122 | return; | |
1123 | ||
1124 | addrconf_addr_solict_mult(addr, &maddr); | |
1125 | __ipv6_dev_mc_dec(idev, &maddr); | |
1126 | } | |
1127 | ||
20380731 | 1128 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1129 | { |
1130 | struct in6_addr addr; | |
1131 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1132 | if (ipv6_addr_any(&addr)) | |
1133 | return; | |
1134 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1135 | } | |
1136 | ||
20380731 | 1137 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1138 | { |
1139 | struct in6_addr addr; | |
1140 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1141 | if (ipv6_addr_any(&addr)) | |
1142 | return; | |
1143 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1144 | } | |
1145 | ||
1146 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) | |
1147 | { | |
1148 | switch (dev->type) { | |
1149 | case ARPHRD_ETHER: | |
1150 | case ARPHRD_FDDI: | |
1151 | case ARPHRD_IEEE802_TR: | |
1152 | if (dev->addr_len != ETH_ALEN) | |
1153 | return -1; | |
1154 | memcpy(eui, dev->dev_addr, 3); | |
1155 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1156 | ||
1157 | /* | |
1158 | * The zSeries OSA network cards can be shared among various | |
1159 | * OS instances, but the OSA cards have only one MAC address. | |
1160 | * This leads to duplicate address conflicts in conjunction | |
1161 | * with IPv6 if more than one instance uses the same card. | |
1162 | * | |
1163 | * The driver for these cards can deliver a unique 16-bit | |
1164 | * identifier for each instance sharing the same card. It is | |
1165 | * placed instead of 0xFFFE in the interface identifier. The | |
1166 | * "u" bit of the interface identifier is not inverted in this | |
1167 | * case. Hence the resulting interface identifier has local | |
1168 | * scope according to RFC2373. | |
1169 | */ | |
1170 | if (dev->dev_id) { | |
1171 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1172 | eui[4] = dev->dev_id & 0xFF; | |
1173 | } else { | |
1174 | eui[3] = 0xFF; | |
1175 | eui[4] = 0xFE; | |
1176 | eui[0] ^= 2; | |
1177 | } | |
1178 | return 0; | |
1179 | case ARPHRD_ARCNET: | |
1180 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1181 | if (dev->addr_len != ARCNET_ALEN) | |
1182 | return -1; | |
1183 | memset(eui, 0, 7); | |
1184 | eui[7] = *(u8*)dev->dev_addr; | |
1185 | return 0; | |
1186 | case ARPHRD_INFINIBAND: | |
1187 | if (dev->addr_len != INFINIBAND_ALEN) | |
1188 | return -1; | |
1189 | memcpy(eui, dev->dev_addr + 12, 8); | |
1190 | eui[0] |= 2; | |
1191 | return 0; | |
1192 | } | |
1193 | return -1; | |
1194 | } | |
1195 | ||
1196 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1197 | { | |
1198 | int err = -1; | |
1199 | struct inet6_ifaddr *ifp; | |
1200 | ||
1201 | read_lock_bh(&idev->lock); | |
1202 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1203 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1204 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1205 | err = 0; | |
1206 | break; | |
1207 | } | |
1208 | } | |
1209 | read_unlock_bh(&idev->lock); | |
1210 | return err; | |
1211 | } | |
1212 | ||
1213 | #ifdef CONFIG_IPV6_PRIVACY | |
1214 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1215 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1216 | { | |
1217 | struct net_device *dev; | |
1218 | struct scatterlist sg[2]; | |
1219 | ||
1220 | sg[0].page = virt_to_page(idev->entropy); | |
1221 | sg[0].offset = offset_in_page(idev->entropy); | |
1222 | sg[0].length = 8; | |
1223 | sg[1].page = virt_to_page(idev->work_eui64); | |
1224 | sg[1].offset = offset_in_page(idev->work_eui64); | |
1225 | sg[1].length = 8; | |
1226 | ||
1227 | dev = idev->dev; | |
1228 | ||
1229 | if (ipv6_generate_eui64(idev->work_eui64, dev)) { | |
1230 | printk(KERN_INFO | |
1231 | "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n", | |
1232 | idev); | |
1233 | get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64)); | |
1234 | } | |
1235 | regen: | |
1236 | spin_lock(&md5_tfm_lock); | |
1237 | if (unlikely(md5_tfm == NULL)) { | |
1238 | spin_unlock(&md5_tfm_lock); | |
1239 | return -1; | |
1240 | } | |
1241 | crypto_digest_init(md5_tfm); | |
1242 | crypto_digest_update(md5_tfm, sg, 2); | |
1243 | crypto_digest_final(md5_tfm, idev->work_digest); | |
1244 | spin_unlock(&md5_tfm_lock); | |
1245 | ||
1246 | memcpy(idev->rndid, &idev->work_digest[0], 8); | |
1247 | idev->rndid[0] &= ~0x02; | |
1248 | memcpy(idev->entropy, &idev->work_digest[8], 8); | |
1249 | ||
1250 | /* | |
1251 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1252 | * check if generated address is not inappropriate | |
1253 | * | |
1254 | * - Reserved subnet anycast (RFC 2526) | |
1255 | * 11111101 11....11 1xxxxxxx | |
1256 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1257 | * 00-00-5E-FE-xx-xx-xx-xx | |
1258 | * - value 0 | |
1259 | * - XXX: already assigned to an address on the device | |
1260 | */ | |
1261 | if (idev->rndid[0] == 0xfd && | |
1262 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && | |
1263 | (idev->rndid[7]&0x80)) | |
1264 | goto regen; | |
1265 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1266 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1267 | goto regen; | |
1268 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1269 | goto regen; | |
1270 | } | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | static void ipv6_regen_rndid(unsigned long data) | |
1276 | { | |
1277 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1278 | unsigned long expires; | |
1279 | ||
1280 | read_lock_bh(&addrconf_lock); | |
1281 | write_lock_bh(&idev->lock); | |
1282 | ||
1283 | if (idev->dead) | |
1284 | goto out; | |
1285 | ||
1286 | if (__ipv6_regen_rndid(idev) < 0) | |
1287 | goto out; | |
1288 | ||
1289 | expires = jiffies + | |
1290 | idev->cnf.temp_prefered_lft * HZ - | |
1291 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; | |
1292 | if (time_before(expires, jiffies)) { | |
1293 | printk(KERN_WARNING | |
1294 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1295 | idev->dev->name); | |
1296 | goto out; | |
1297 | } | |
1298 | ||
1299 | if (!mod_timer(&idev->regen_timer, expires)) | |
1300 | in6_dev_hold(idev); | |
1301 | ||
1302 | out: | |
1303 | write_unlock_bh(&idev->lock); | |
1304 | read_unlock_bh(&addrconf_lock); | |
1305 | in6_dev_put(idev); | |
1306 | } | |
1307 | ||
1308 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1309 | int ret = 0; | |
1310 | ||
1311 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1312 | ret = __ipv6_regen_rndid(idev); | |
1313 | return ret; | |
1314 | } | |
1315 | #endif | |
1316 | ||
1317 | /* | |
1318 | * Add prefix route. | |
1319 | */ | |
1320 | ||
1321 | static void | |
1322 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1323 | unsigned long expires, u32 flags) |
1da177e4 LT |
1324 | { |
1325 | struct in6_rtmsg rtmsg; | |
1326 | ||
1327 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1328 | ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx); | |
1329 | rtmsg.rtmsg_dst_len = plen; | |
1330 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1331 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1332 | rtmsg.rtmsg_info = expires; | |
1333 | rtmsg.rtmsg_flags = RTF_UP|flags; | |
1334 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1335 | ||
1336 | /* Prevent useless cloning on PtP SIT. | |
1337 | This thing is done here expecting that the whole | |
1338 | class of non-broadcast devices need not cloning. | |
1339 | */ | |
1340 | if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT)) | |
1341 | rtmsg.rtmsg_flags |= RTF_NONEXTHOP; | |
1342 | ||
0d51aa80 | 1343 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | /* Create "default" multicast route to the interface */ | |
1347 | ||
1348 | static void addrconf_add_mroute(struct net_device *dev) | |
1349 | { | |
1350 | struct in6_rtmsg rtmsg; | |
1351 | ||
1352 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1353 | ipv6_addr_set(&rtmsg.rtmsg_dst, | |
1354 | htonl(0xFF000000), 0, 0, 0); | |
1355 | rtmsg.rtmsg_dst_len = 8; | |
1356 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1357 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1358 | rtmsg.rtmsg_flags = RTF_UP; | |
1359 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
0d51aa80 | 1360 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | static void sit_route_add(struct net_device *dev) | |
1364 | { | |
1365 | struct in6_rtmsg rtmsg; | |
1366 | ||
1367 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1368 | ||
1369 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1370 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1371 | ||
1372 | /* prefix length - 96 bits "::d.d.d.d" */ | |
1373 | rtmsg.rtmsg_dst_len = 96; | |
1374 | rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP; | |
1375 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1376 | ||
0d51aa80 | 1377 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1378 | } |
1379 | ||
1380 | static void addrconf_add_lroute(struct net_device *dev) | |
1381 | { | |
1382 | struct in6_addr addr; | |
1383 | ||
1384 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1385 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1386 | } | |
1387 | ||
1388 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1389 | { | |
1390 | struct inet6_dev *idev; | |
1391 | ||
1392 | ASSERT_RTNL(); | |
1393 | ||
1394 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1395 | return NULL; | |
1396 | ||
1397 | /* Add default multicast route */ | |
1398 | addrconf_add_mroute(dev); | |
1399 | ||
1400 | /* Add link local route */ | |
1401 | addrconf_add_lroute(dev); | |
1402 | return idev; | |
1403 | } | |
1404 | ||
1405 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1406 | { | |
1407 | struct prefix_info *pinfo; | |
1408 | __u32 valid_lft; | |
1409 | __u32 prefered_lft; | |
1410 | int addr_type; | |
1411 | unsigned long rt_expires; | |
1412 | struct inet6_dev *in6_dev; | |
1413 | ||
1414 | pinfo = (struct prefix_info *) opt; | |
1415 | ||
1416 | if (len < sizeof(struct prefix_info)) { | |
1417 | ADBG(("addrconf: prefix option too short\n")); | |
1418 | return; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Validation checks ([ADDRCONF], page 19) | |
1423 | */ | |
1424 | ||
1425 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1426 | ||
1427 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1428 | return; | |
1429 | ||
1430 | valid_lft = ntohl(pinfo->valid); | |
1431 | prefered_lft = ntohl(pinfo->prefered); | |
1432 | ||
1433 | if (prefered_lft > valid_lft) { | |
1434 | if (net_ratelimit()) | |
1435 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1436 | return; | |
1437 | } | |
1438 | ||
1439 | in6_dev = in6_dev_get(dev); | |
1440 | ||
1441 | if (in6_dev == NULL) { | |
1442 | if (net_ratelimit()) | |
1443 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1444 | return; | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * Two things going on here: | |
1449 | * 1) Add routes for on-link prefixes | |
1450 | * 2) Configure prefixes with the auto flag set | |
1451 | */ | |
1452 | ||
1453 | /* Avoid arithmetic overflow. Really, we could | |
1454 | save rt_expires in seconds, likely valid_lft, | |
1455 | but it would require division in fib gc, that it | |
1456 | not good. | |
1457 | */ | |
1458 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
1459 | rt_expires = 0; | |
1460 | else | |
1461 | rt_expires = jiffies + valid_lft * HZ; | |
1462 | ||
1463 | if (pinfo->onlink) { | |
1464 | struct rt6_info *rt; | |
1465 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1466 | ||
1467 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1468 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1469 | if (valid_lft == 0) { | |
0d51aa80 | 1470 | ip6_del_rt(rt, NULL, NULL, NULL); |
1da177e4 LT |
1471 | rt = NULL; |
1472 | } else { | |
1473 | rt->rt6i_expires = rt_expires; | |
1474 | } | |
1475 | } | |
1476 | } else if (valid_lft) { | |
1477 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
1478 | dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); | |
1479 | } | |
1480 | if (rt) | |
1481 | dst_release(&rt->u.dst); | |
1482 | } | |
1483 | ||
1484 | /* Try to figure out our local address for this prefix */ | |
1485 | ||
1486 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1487 | struct inet6_ifaddr * ifp; | |
1488 | struct in6_addr addr; | |
1489 | int create = 0, update_lft = 0; | |
1490 | ||
1491 | if (pinfo->prefix_len == 64) { | |
1492 | memcpy(&addr, &pinfo->prefix, 8); | |
1493 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1494 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1495 | in6_dev_put(in6_dev); | |
1496 | return; | |
1497 | } | |
1498 | goto ok; | |
1499 | } | |
1500 | if (net_ratelimit()) | |
1501 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1502 | pinfo->prefix_len); | |
1503 | in6_dev_put(in6_dev); | |
1504 | return; | |
1505 | ||
1506 | ok: | |
1507 | ||
1508 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1509 | ||
1510 | if (ifp == NULL && valid_lft) { | |
1511 | int max_addresses = in6_dev->cnf.max_addresses; | |
1512 | ||
1513 | /* Do not allow to create too much of autoconfigured | |
1514 | * addresses; this would be too easy way to crash kernel. | |
1515 | */ | |
1516 | if (!max_addresses || | |
1517 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1518 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1519 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1520 | ||
1521 | if (!ifp || IS_ERR(ifp)) { | |
1522 | in6_dev_put(in6_dev); | |
1523 | return; | |
1524 | } | |
1525 | ||
1526 | update_lft = create = 1; | |
1527 | ifp->cstamp = jiffies; | |
1528 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1529 | } | |
1530 | ||
1531 | if (ifp) { | |
1532 | int flags; | |
1533 | unsigned long now; | |
1534 | #ifdef CONFIG_IPV6_PRIVACY | |
1535 | struct inet6_ifaddr *ift; | |
1536 | #endif | |
1537 | u32 stored_lft; | |
1538 | ||
1539 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1540 | spin_lock(&ifp->lock); | |
1541 | now = jiffies; | |
1542 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1543 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1544 | else | |
1545 | stored_lft = 0; | |
1546 | if (!update_lft && stored_lft) { | |
1547 | if (valid_lft > MIN_VALID_LIFETIME || | |
1548 | valid_lft > stored_lft) | |
1549 | update_lft = 1; | |
1550 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1551 | /* valid_lft <= stored_lft is always true */ | |
1552 | /* XXX: IPsec */ | |
1553 | update_lft = 0; | |
1554 | } else { | |
1555 | valid_lft = MIN_VALID_LIFETIME; | |
1556 | if (valid_lft < prefered_lft) | |
1557 | prefered_lft = valid_lft; | |
1558 | update_lft = 1; | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | if (update_lft) { | |
1563 | ifp->valid_lft = valid_lft; | |
1564 | ifp->prefered_lft = prefered_lft; | |
1565 | ifp->tstamp = now; | |
1566 | flags = ifp->flags; | |
1567 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1568 | spin_unlock(&ifp->lock); | |
1569 | ||
1570 | if (!(flags&IFA_F_TENTATIVE)) | |
1571 | ipv6_ifa_notify(0, ifp); | |
1572 | } else | |
1573 | spin_unlock(&ifp->lock); | |
1574 | ||
1575 | #ifdef CONFIG_IPV6_PRIVACY | |
1576 | read_lock_bh(&in6_dev->lock); | |
1577 | /* update all temporary addresses in the list */ | |
1578 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1579 | /* | |
1580 | * When adjusting the lifetimes of an existing | |
1581 | * temporary address, only lower the lifetimes. | |
1582 | * Implementations must not increase the | |
1583 | * lifetimes of an existing temporary address | |
1584 | * when processing a Prefix Information Option. | |
1585 | */ | |
1586 | spin_lock(&ift->lock); | |
1587 | flags = ift->flags; | |
1588 | if (ift->valid_lft > valid_lft && | |
1589 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1590 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1591 | if (ift->prefered_lft > prefered_lft && | |
1592 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1593 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1594 | spin_unlock(&ift->lock); | |
1595 | if (!(flags&IFA_F_TENTATIVE)) | |
1596 | ipv6_ifa_notify(0, ift); | |
1597 | } | |
1598 | ||
1599 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1600 | /* | |
1601 | * When a new public address is created as described in [ADDRCONF], | |
1602 | * also create a new temporary address. | |
1603 | */ | |
1604 | read_unlock_bh(&in6_dev->lock); | |
1605 | ipv6_create_tempaddr(ifp, NULL); | |
1606 | } else { | |
1607 | read_unlock_bh(&in6_dev->lock); | |
1608 | } | |
1609 | #endif | |
1610 | in6_ifa_put(ifp); | |
1611 | addrconf_verify(0); | |
1612 | } | |
1613 | } | |
1614 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1615 | in6_dev_put(in6_dev); | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Set destination address. | |
1620 | * Special case for SIT interfaces where we create a new "virtual" | |
1621 | * device. | |
1622 | */ | |
1623 | int addrconf_set_dstaddr(void __user *arg) | |
1624 | { | |
1625 | struct in6_ifreq ireq; | |
1626 | struct net_device *dev; | |
1627 | int err = -EINVAL; | |
1628 | ||
1629 | rtnl_lock(); | |
1630 | ||
1631 | err = -EFAULT; | |
1632 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1633 | goto err_exit; | |
1634 | ||
1635 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1636 | ||
1637 | err = -ENODEV; | |
1638 | if (dev == NULL) | |
1639 | goto err_exit; | |
1640 | ||
1641 | if (dev->type == ARPHRD_SIT) { | |
1642 | struct ifreq ifr; | |
1643 | mm_segment_t oldfs; | |
1644 | struct ip_tunnel_parm p; | |
1645 | ||
1646 | err = -EADDRNOTAVAIL; | |
1647 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1648 | goto err_exit; | |
1649 | ||
1650 | memset(&p, 0, sizeof(p)); | |
1651 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1652 | p.iph.saddr = 0; | |
1653 | p.iph.version = 4; | |
1654 | p.iph.ihl = 5; | |
1655 | p.iph.protocol = IPPROTO_IPV6; | |
1656 | p.iph.ttl = 64; | |
1657 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1658 | ||
1659 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1660 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1661 | set_fs(oldfs); | |
1662 | ||
1663 | if (err == 0) { | |
1664 | err = -ENOBUFS; | |
1665 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1666 | goto err_exit; | |
1667 | err = dev_open(dev); | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | err_exit: | |
1672 | rtnl_unlock(); | |
1673 | return err; | |
1674 | } | |
1675 | ||
1676 | /* | |
1677 | * Manual configuration of address on an interface | |
1678 | */ | |
1679 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen) | |
1680 | { | |
1681 | struct inet6_ifaddr *ifp; | |
1682 | struct inet6_dev *idev; | |
1683 | struct net_device *dev; | |
1684 | int scope; | |
1685 | ||
1686 | ASSERT_RTNL(); | |
1687 | ||
1688 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1689 | return -ENODEV; | |
1690 | ||
1691 | if (!(dev->flags&IFF_UP)) | |
1692 | return -ENETDOWN; | |
1693 | ||
1694 | if ((idev = addrconf_add_dev(dev)) == NULL) | |
1695 | return -ENOBUFS; | |
1696 | ||
1697 | scope = ipv6_addr_scope(pfx); | |
1698 | ||
1699 | ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT); | |
1700 | if (!IS_ERR(ifp)) { | |
1701 | addrconf_dad_start(ifp, 0); | |
1702 | in6_ifa_put(ifp); | |
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | return PTR_ERR(ifp); | |
1707 | } | |
1708 | ||
1709 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1710 | { | |
1711 | struct inet6_ifaddr *ifp; | |
1712 | struct inet6_dev *idev; | |
1713 | struct net_device *dev; | |
1714 | ||
1715 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1716 | return -ENODEV; | |
1717 | ||
1718 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1719 | return -ENXIO; | |
1720 | ||
1721 | read_lock_bh(&idev->lock); | |
1722 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1723 | if (ifp->prefix_len == plen && | |
1724 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1725 | in6_ifa_hold(ifp); | |
1726 | read_unlock_bh(&idev->lock); | |
1727 | ||
1728 | ipv6_del_addr(ifp); | |
1729 | ||
1730 | /* If the last address is deleted administratively, | |
1731 | disable IPv6 on this interface. | |
1732 | */ | |
1733 | if (idev->addr_list == NULL) | |
1734 | addrconf_ifdown(idev->dev, 1); | |
1735 | return 0; | |
1736 | } | |
1737 | } | |
1738 | read_unlock_bh(&idev->lock); | |
1739 | return -EADDRNOTAVAIL; | |
1740 | } | |
1741 | ||
1742 | ||
1743 | int addrconf_add_ifaddr(void __user *arg) | |
1744 | { | |
1745 | struct in6_ifreq ireq; | |
1746 | int err; | |
1747 | ||
1748 | if (!capable(CAP_NET_ADMIN)) | |
1749 | return -EPERM; | |
1750 | ||
1751 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1752 | return -EFAULT; | |
1753 | ||
1754 | rtnl_lock(); | |
1755 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1756 | rtnl_unlock(); | |
1757 | return err; | |
1758 | } | |
1759 | ||
1760 | int addrconf_del_ifaddr(void __user *arg) | |
1761 | { | |
1762 | struct in6_ifreq ireq; | |
1763 | int err; | |
1764 | ||
1765 | if (!capable(CAP_NET_ADMIN)) | |
1766 | return -EPERM; | |
1767 | ||
1768 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1769 | return -EFAULT; | |
1770 | ||
1771 | rtnl_lock(); | |
1772 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1773 | rtnl_unlock(); | |
1774 | return err; | |
1775 | } | |
1776 | ||
1777 | static void sit_add_v4_addrs(struct inet6_dev *idev) | |
1778 | { | |
1779 | struct inet6_ifaddr * ifp; | |
1780 | struct in6_addr addr; | |
1781 | struct net_device *dev; | |
1782 | int scope; | |
1783 | ||
1784 | ASSERT_RTNL(); | |
1785 | ||
1786 | memset(&addr, 0, sizeof(struct in6_addr)); | |
1787 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
1788 | ||
1789 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
1790 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1791 | scope = IFA_LINK; | |
1792 | } else { | |
1793 | scope = IPV6_ADDR_COMPATv4; | |
1794 | } | |
1795 | ||
1796 | if (addr.s6_addr32[3]) { | |
1797 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
1798 | if (!IS_ERR(ifp)) { | |
1799 | spin_lock_bh(&ifp->lock); | |
1800 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1801 | spin_unlock_bh(&ifp->lock); | |
1802 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1803 | in6_ifa_put(ifp); | |
1804 | } | |
1805 | return; | |
1806 | } | |
1807 | ||
1808 | for (dev = dev_base; dev != NULL; dev = dev->next) { | |
e5ed6399 | 1809 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1810 | if (in_dev && (dev->flags & IFF_UP)) { |
1811 | struct in_ifaddr * ifa; | |
1812 | ||
1813 | int flag = scope; | |
1814 | ||
1815 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1816 | int plen; | |
1817 | ||
1818 | addr.s6_addr32[3] = ifa->ifa_local; | |
1819 | ||
1820 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
1821 | continue; | |
1822 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
1823 | if (idev->dev->flags&IFF_POINTOPOINT) | |
1824 | continue; | |
1825 | flag |= IFA_HOST; | |
1826 | } | |
1827 | if (idev->dev->flags&IFF_POINTOPOINT) | |
1828 | plen = 64; | |
1829 | else | |
1830 | plen = 96; | |
1831 | ||
1832 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
1833 | IFA_F_PERMANENT); | |
1834 | if (!IS_ERR(ifp)) { | |
1835 | spin_lock_bh(&ifp->lock); | |
1836 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1837 | spin_unlock_bh(&ifp->lock); | |
1838 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1839 | in6_ifa_put(ifp); | |
1840 | } | |
1841 | } | |
1842 | } | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | static void init_loopback(struct net_device *dev) | |
1847 | { | |
1848 | struct inet6_dev *idev; | |
1849 | struct inet6_ifaddr * ifp; | |
1850 | ||
1851 | /* ::1 */ | |
1852 | ||
1853 | ASSERT_RTNL(); | |
1854 | ||
1855 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
1856 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
1861 | if (!IS_ERR(ifp)) { | |
1862 | spin_lock_bh(&ifp->lock); | |
1863 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1864 | spin_unlock_bh(&ifp->lock); | |
1865 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1866 | in6_ifa_put(ifp); | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
1871 | { | |
1872 | struct inet6_ifaddr * ifp; | |
1873 | ||
1874 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
1875 | if (!IS_ERR(ifp)) { | |
1876 | addrconf_dad_start(ifp, 0); | |
1877 | in6_ifa_put(ifp); | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | static void addrconf_dev_config(struct net_device *dev) | |
1882 | { | |
1883 | struct in6_addr addr; | |
1884 | struct inet6_dev * idev; | |
1885 | ||
1886 | ASSERT_RTNL(); | |
1887 | ||
1888 | if ((dev->type != ARPHRD_ETHER) && | |
1889 | (dev->type != ARPHRD_FDDI) && | |
1890 | (dev->type != ARPHRD_IEEE802_TR) && | |
1891 | (dev->type != ARPHRD_ARCNET) && | |
1892 | (dev->type != ARPHRD_INFINIBAND)) { | |
1893 | /* Alas, we support only Ethernet autoconfiguration. */ | |
1894 | return; | |
1895 | } | |
1896 | ||
1897 | idev = addrconf_add_dev(dev); | |
1898 | if (idev == NULL) | |
1899 | return; | |
1900 | ||
1901 | memset(&addr, 0, sizeof(struct in6_addr)); | |
1902 | addr.s6_addr32[0] = htonl(0xFE800000); | |
1903 | ||
1904 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
1905 | addrconf_add_linklocal(idev, &addr); | |
1906 | } | |
1907 | ||
1908 | static void addrconf_sit_config(struct net_device *dev) | |
1909 | { | |
1910 | struct inet6_dev *idev; | |
1911 | ||
1912 | ASSERT_RTNL(); | |
1913 | ||
1914 | /* | |
1915 | * Configure the tunnel with one of our IPv4 | |
1916 | * addresses... we should configure all of | |
1917 | * our v4 addrs in the tunnel | |
1918 | */ | |
1919 | ||
1920 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
1921 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
1922 | return; | |
1923 | } | |
1924 | ||
1925 | sit_add_v4_addrs(idev); | |
1926 | ||
1927 | if (dev->flags&IFF_POINTOPOINT) { | |
1928 | addrconf_add_mroute(dev); | |
1929 | addrconf_add_lroute(dev); | |
1930 | } else | |
1931 | sit_route_add(dev); | |
1932 | } | |
1933 | ||
1934 | static inline int | |
1935 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
1936 | { | |
1937 | struct in6_addr lladdr; | |
1938 | ||
1939 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
1940 | addrconf_add_linklocal(idev, &lladdr); | |
1941 | return 0; | |
1942 | } | |
1943 | return -1; | |
1944 | } | |
1945 | ||
1946 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
1947 | { | |
1948 | struct net_device *link_dev; | |
1949 | ||
1950 | /* first try to inherit the link-local address from the link device */ | |
1951 | if (idev->dev->iflink && | |
1952 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
1953 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
1954 | return; | |
1955 | } | |
1956 | /* then try to inherit it from any device */ | |
1957 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
1958 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
1959 | return; | |
1960 | } | |
1961 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
1962 | } | |
1963 | ||
1964 | /* | |
1965 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
1966 | * DHCPv6, MLD etc. can be run over the virtual link | |
1967 | */ | |
1968 | ||
1969 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
1970 | { | |
1971 | struct inet6_dev *idev; | |
1972 | ||
1973 | ASSERT_RTNL(); | |
1974 | ||
1975 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
1976 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
1977 | return; | |
1978 | } | |
1979 | ip6_tnl_add_linklocal(idev); | |
1980 | addrconf_add_mroute(dev); | |
1981 | } | |
1982 | ||
1983 | static int addrconf_notify(struct notifier_block *this, unsigned long event, | |
1984 | void * data) | |
1985 | { | |
1986 | struct net_device *dev = (struct net_device *) data; | |
1987 | struct inet6_dev *idev = __in6_dev_get(dev); | |
1988 | ||
1989 | switch(event) { | |
1990 | case NETDEV_UP: | |
1991 | switch(dev->type) { | |
1992 | case ARPHRD_SIT: | |
1993 | addrconf_sit_config(dev); | |
1994 | break; | |
1995 | case ARPHRD_TUNNEL6: | |
1996 | addrconf_ip6_tnl_config(dev); | |
1997 | break; | |
1998 | case ARPHRD_LOOPBACK: | |
1999 | init_loopback(dev); | |
2000 | break; | |
2001 | ||
2002 | default: | |
2003 | addrconf_dev_config(dev); | |
2004 | break; | |
2005 | }; | |
2006 | if (idev) { | |
2007 | /* If the MTU changed during the interface down, when the | |
2008 | interface up, the changed MTU must be reflected in the | |
2009 | idev as well as routers. | |
2010 | */ | |
2011 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2012 | rt6_mtu_change(dev, dev->mtu); | |
2013 | idev->cnf.mtu6 = dev->mtu; | |
2014 | } | |
2015 | idev->tstamp = jiffies; | |
2016 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2017 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2018 | stop IPv6 on this interface. | |
2019 | */ | |
2020 | if (dev->mtu < IPV6_MIN_MTU) | |
2021 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2022 | } | |
2023 | break; | |
2024 | ||
2025 | case NETDEV_CHANGEMTU: | |
2026 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2027 | rt6_mtu_change(dev, dev->mtu); | |
2028 | idev->cnf.mtu6 = dev->mtu; | |
2029 | break; | |
2030 | } | |
2031 | ||
2032 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2033 | ||
2034 | case NETDEV_DOWN: | |
2035 | case NETDEV_UNREGISTER: | |
2036 | /* | |
2037 | * Remove all addresses from this interface. | |
2038 | */ | |
2039 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2040 | break; | |
2041 | case NETDEV_CHANGE: | |
2042 | break; | |
2043 | case NETDEV_CHANGENAME: | |
2044 | #ifdef CONFIG_SYSCTL | |
2045 | if (idev) { | |
2046 | addrconf_sysctl_unregister(&idev->cnf); | |
2047 | neigh_sysctl_unregister(idev->nd_parms); | |
2048 | neigh_sysctl_register(dev, idev->nd_parms, | |
2049 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2050 | &ndisc_ifinfo_sysctl_change, | |
2051 | NULL); | |
2052 | addrconf_sysctl_register(idev, &idev->cnf); | |
2053 | } | |
2054 | #endif | |
2055 | break; | |
2056 | }; | |
2057 | ||
2058 | return NOTIFY_OK; | |
2059 | } | |
2060 | ||
2061 | /* | |
2062 | * addrconf module should be notified of a device going up | |
2063 | */ | |
2064 | static struct notifier_block ipv6_dev_notf = { | |
2065 | .notifier_call = addrconf_notify, | |
2066 | .priority = 0 | |
2067 | }; | |
2068 | ||
2069 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2070 | { | |
2071 | struct inet6_dev *idev; | |
2072 | struct inet6_ifaddr *ifa, **bifa; | |
2073 | int i; | |
2074 | ||
2075 | ASSERT_RTNL(); | |
2076 | ||
2077 | if (dev == &loopback_dev && how == 1) | |
2078 | how = 0; | |
2079 | ||
2080 | rt6_ifdown(dev); | |
2081 | neigh_ifdown(&nd_tbl, dev); | |
2082 | ||
2083 | idev = __in6_dev_get(dev); | |
2084 | if (idev == NULL) | |
2085 | return -ENODEV; | |
2086 | ||
2087 | /* Step 1: remove reference to ipv6 device from parent device. | |
2088 | Do not dev_put! | |
2089 | */ | |
2090 | if (how == 1) { | |
2091 | write_lock_bh(&addrconf_lock); | |
2092 | dev->ip6_ptr = NULL; | |
2093 | idev->dead = 1; | |
2094 | write_unlock_bh(&addrconf_lock); | |
2095 | ||
2096 | /* Step 1.5: remove snmp6 entry */ | |
2097 | snmp6_unregister_dev(idev); | |
2098 | ||
2099 | } | |
2100 | ||
2101 | /* Step 2: clear hash table */ | |
2102 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2103 | bifa = &inet6_addr_lst[i]; | |
2104 | ||
2105 | write_lock_bh(&addrconf_hash_lock); | |
2106 | while ((ifa = *bifa) != NULL) { | |
2107 | if (ifa->idev == idev) { | |
2108 | *bifa = ifa->lst_next; | |
2109 | ifa->lst_next = NULL; | |
2110 | addrconf_del_timer(ifa); | |
2111 | in6_ifa_put(ifa); | |
2112 | continue; | |
2113 | } | |
2114 | bifa = &ifa->lst_next; | |
2115 | } | |
2116 | write_unlock_bh(&addrconf_hash_lock); | |
2117 | } | |
2118 | ||
2119 | write_lock_bh(&idev->lock); | |
2120 | ||
2121 | /* Step 3: clear flags for stateless addrconf */ | |
2122 | if (how != 1) | |
2123 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD); | |
2124 | ||
2125 | /* Step 4: clear address list */ | |
2126 | #ifdef CONFIG_IPV6_PRIVACY | |
2127 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2128 | in6_dev_put(idev); | |
2129 | ||
2130 | /* clear tempaddr list */ | |
2131 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2132 | idev->tempaddr_list = ifa->tmp_next; | |
2133 | ifa->tmp_next = NULL; | |
2134 | ifa->dead = 1; | |
2135 | write_unlock_bh(&idev->lock); | |
2136 | spin_lock_bh(&ifa->lock); | |
2137 | ||
2138 | if (ifa->ifpub) { | |
2139 | in6_ifa_put(ifa->ifpub); | |
2140 | ifa->ifpub = NULL; | |
2141 | } | |
2142 | spin_unlock_bh(&ifa->lock); | |
2143 | in6_ifa_put(ifa); | |
2144 | write_lock_bh(&idev->lock); | |
2145 | } | |
2146 | #endif | |
2147 | while ((ifa = idev->addr_list) != NULL) { | |
2148 | idev->addr_list = ifa->if_next; | |
2149 | ifa->if_next = NULL; | |
2150 | ifa->dead = 1; | |
2151 | addrconf_del_timer(ifa); | |
2152 | write_unlock_bh(&idev->lock); | |
2153 | ||
2154 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2155 | in6_ifa_put(ifa); | |
2156 | ||
2157 | write_lock_bh(&idev->lock); | |
2158 | } | |
2159 | write_unlock_bh(&idev->lock); | |
2160 | ||
2161 | /* Step 5: Discard multicast list */ | |
2162 | ||
2163 | if (how == 1) | |
2164 | ipv6_mc_destroy_dev(idev); | |
2165 | else | |
2166 | ipv6_mc_down(idev); | |
2167 | ||
2168 | /* Step 5: netlink notification of this interface */ | |
2169 | idev->tstamp = jiffies; | |
2170 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2171 | ||
2172 | /* Shot the device (if unregistered) */ | |
2173 | ||
2174 | if (how == 1) { | |
2175 | #ifdef CONFIG_SYSCTL | |
2176 | addrconf_sysctl_unregister(&idev->cnf); | |
2177 | neigh_sysctl_unregister(idev->nd_parms); | |
2178 | #endif | |
2179 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2180 | neigh_ifdown(&nd_tbl, dev); | |
2181 | in6_dev_put(idev); | |
2182 | } | |
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | static void addrconf_rs_timer(unsigned long data) | |
2187 | { | |
2188 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2189 | ||
2190 | if (ifp->idev->cnf.forwarding) | |
2191 | goto out; | |
2192 | ||
2193 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2194 | /* | |
2195 | * Announcement received after solicitation | |
2196 | * was sent | |
2197 | */ | |
2198 | goto out; | |
2199 | } | |
2200 | ||
2201 | spin_lock(&ifp->lock); | |
2202 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2203 | struct in6_addr all_routers; | |
2204 | ||
2205 | /* The wait after the last probe can be shorter */ | |
2206 | addrconf_mod_timer(ifp, AC_RS, | |
2207 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2208 | ifp->idev->cnf.rtr_solicit_delay : | |
2209 | ifp->idev->cnf.rtr_solicit_interval); | |
2210 | spin_unlock(&ifp->lock); | |
2211 | ||
2212 | ipv6_addr_all_routers(&all_routers); | |
2213 | ||
2214 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2215 | } else { | |
2216 | spin_unlock(&ifp->lock); | |
2217 | /* | |
2218 | * Note: we do not support deprecated "all on-link" | |
2219 | * assumption any longer. | |
2220 | */ | |
2221 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2222 | ifp->idev->dev->name); | |
2223 | } | |
2224 | ||
2225 | out: | |
2226 | in6_ifa_put(ifp); | |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * Duplicate Address Detection | |
2231 | */ | |
e431b8c0 | 2232 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2233 | { |
2234 | struct inet6_dev *idev = ifp->idev; | |
2235 | struct net_device *dev = idev->dev; | |
2236 | unsigned long rand_num; | |
2237 | ||
2238 | addrconf_join_solict(dev, &ifp->addr); | |
2239 | ||
2240 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2241 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2242 | flags); | |
2243 | ||
2244 | net_srandom(ifp->addr.s6_addr32[3]); | |
2245 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2246 | ||
2247 | read_lock_bh(&idev->lock); | |
2248 | if (ifp->dead) | |
2249 | goto out; | |
2250 | spin_lock_bh(&ifp->lock); | |
2251 | ||
2252 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
2253 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2254 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2255 | spin_unlock_bh(&ifp->lock); | |
2256 | read_unlock_bh(&idev->lock); | |
2257 | ||
2258 | addrconf_dad_completed(ifp); | |
2259 | return; | |
2260 | } | |
2261 | ||
2262 | ifp->probes = idev->cnf.dad_transmits; | |
2263 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2264 | ||
2265 | spin_unlock_bh(&ifp->lock); | |
2266 | out: | |
2267 | read_unlock_bh(&idev->lock); | |
2268 | } | |
2269 | ||
2270 | static void addrconf_dad_timer(unsigned long data) | |
2271 | { | |
2272 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2273 | struct inet6_dev *idev = ifp->idev; | |
2274 | struct in6_addr unspec; | |
2275 | struct in6_addr mcaddr; | |
2276 | ||
2277 | read_lock_bh(&idev->lock); | |
2278 | if (idev->dead) { | |
2279 | read_unlock_bh(&idev->lock); | |
2280 | goto out; | |
2281 | } | |
2282 | spin_lock_bh(&ifp->lock); | |
2283 | if (ifp->probes == 0) { | |
2284 | /* | |
2285 | * DAD was successful | |
2286 | */ | |
2287 | ||
2288 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2289 | spin_unlock_bh(&ifp->lock); | |
2290 | read_unlock_bh(&idev->lock); | |
2291 | ||
2292 | addrconf_dad_completed(ifp); | |
2293 | ||
2294 | goto out; | |
2295 | } | |
2296 | ||
2297 | ifp->probes--; | |
2298 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2299 | spin_unlock_bh(&ifp->lock); | |
2300 | read_unlock_bh(&idev->lock); | |
2301 | ||
2302 | /* send a neighbour solicitation for our addr */ | |
2303 | memset(&unspec, 0, sizeof(unspec)); | |
2304 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2305 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2306 | out: | |
2307 | in6_ifa_put(ifp); | |
2308 | } | |
2309 | ||
2310 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2311 | { | |
2312 | struct net_device * dev = ifp->idev->dev; | |
2313 | ||
2314 | /* | |
2315 | * Configure the address for reception. Now it is valid. | |
2316 | */ | |
2317 | ||
2318 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2319 | ||
2320 | /* If added prefix is link local and forwarding is off, | |
2321 | start sending router solicitations. | |
2322 | */ | |
2323 | ||
2324 | if (ifp->idev->cnf.forwarding == 0 && | |
2325 | ifp->idev->cnf.rtr_solicits > 0 && | |
2326 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2327 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2328 | struct in6_addr all_routers; | |
2329 | ||
2330 | ipv6_addr_all_routers(&all_routers); | |
2331 | ||
2332 | /* | |
2333 | * If a host as already performed a random delay | |
2334 | * [...] as part of DAD [...] there is no need | |
2335 | * to delay again before sending the first RS | |
2336 | */ | |
2337 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2338 | ||
2339 | spin_lock_bh(&ifp->lock); | |
2340 | ifp->probes = 1; | |
2341 | ifp->idev->if_flags |= IF_RS_SENT; | |
2342 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2343 | spin_unlock_bh(&ifp->lock); | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | #ifdef CONFIG_PROC_FS | |
2348 | struct if6_iter_state { | |
2349 | int bucket; | |
2350 | }; | |
2351 | ||
2352 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2353 | { | |
2354 | struct inet6_ifaddr *ifa = NULL; | |
2355 | struct if6_iter_state *state = seq->private; | |
2356 | ||
2357 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2358 | ifa = inet6_addr_lst[state->bucket]; | |
2359 | if (ifa) | |
2360 | break; | |
2361 | } | |
2362 | return ifa; | |
2363 | } | |
2364 | ||
2365 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2366 | { | |
2367 | struct if6_iter_state *state = seq->private; | |
2368 | ||
2369 | ifa = ifa->lst_next; | |
2370 | try_again: | |
2371 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2372 | ifa = inet6_addr_lst[state->bucket]; | |
2373 | goto try_again; | |
2374 | } | |
2375 | return ifa; | |
2376 | } | |
2377 | ||
2378 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2379 | { | |
2380 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2381 | ||
2382 | if (ifa) | |
2383 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2384 | --pos; | |
2385 | return pos ? NULL : ifa; | |
2386 | } | |
2387 | ||
2388 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2389 | { | |
2390 | read_lock_bh(&addrconf_hash_lock); | |
2391 | return if6_get_idx(seq, *pos); | |
2392 | } | |
2393 | ||
2394 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2395 | { | |
2396 | struct inet6_ifaddr *ifa; | |
2397 | ||
2398 | ifa = if6_get_next(seq, v); | |
2399 | ++*pos; | |
2400 | return ifa; | |
2401 | } | |
2402 | ||
2403 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2404 | { | |
2405 | read_unlock_bh(&addrconf_hash_lock); | |
2406 | } | |
2407 | ||
2408 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2409 | { | |
2410 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2411 | seq_printf(seq, | |
2412 | "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n", | |
2413 | NIP6(ifp->addr), | |
2414 | ifp->idev->dev->ifindex, | |
2415 | ifp->prefix_len, | |
2416 | ifp->scope, | |
2417 | ifp->flags, | |
2418 | ifp->idev->dev->name); | |
2419 | return 0; | |
2420 | } | |
2421 | ||
2422 | static struct seq_operations if6_seq_ops = { | |
2423 | .start = if6_seq_start, | |
2424 | .next = if6_seq_next, | |
2425 | .show = if6_seq_show, | |
2426 | .stop = if6_seq_stop, | |
2427 | }; | |
2428 | ||
2429 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2430 | { | |
2431 | struct seq_file *seq; | |
2432 | int rc = -ENOMEM; | |
2433 | struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
2434 | ||
2435 | if (!s) | |
2436 | goto out; | |
2437 | memset(s, 0, sizeof(*s)); | |
2438 | ||
2439 | rc = seq_open(file, &if6_seq_ops); | |
2440 | if (rc) | |
2441 | goto out_kfree; | |
2442 | ||
2443 | seq = file->private_data; | |
2444 | seq->private = s; | |
2445 | out: | |
2446 | return rc; | |
2447 | out_kfree: | |
2448 | kfree(s); | |
2449 | goto out; | |
2450 | } | |
2451 | ||
2452 | static struct file_operations if6_fops = { | |
2453 | .owner = THIS_MODULE, | |
2454 | .open = if6_seq_open, | |
2455 | .read = seq_read, | |
2456 | .llseek = seq_lseek, | |
2457 | .release = seq_release_private, | |
2458 | }; | |
2459 | ||
2460 | int __init if6_proc_init(void) | |
2461 | { | |
2462 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2463 | return -ENOMEM; | |
2464 | return 0; | |
2465 | } | |
2466 | ||
2467 | void if6_proc_exit(void) | |
2468 | { | |
2469 | proc_net_remove("if_inet6"); | |
2470 | } | |
2471 | #endif /* CONFIG_PROC_FS */ | |
2472 | ||
2473 | /* | |
2474 | * Periodic address status verification | |
2475 | */ | |
2476 | ||
2477 | static void addrconf_verify(unsigned long foo) | |
2478 | { | |
2479 | struct inet6_ifaddr *ifp; | |
2480 | unsigned long now, next; | |
2481 | int i; | |
2482 | ||
2483 | spin_lock_bh(&addrconf_verify_lock); | |
2484 | now = jiffies; | |
2485 | next = now + ADDR_CHECK_FREQUENCY; | |
2486 | ||
2487 | del_timer(&addr_chk_timer); | |
2488 | ||
2489 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2490 | ||
2491 | restart: | |
2492 | write_lock(&addrconf_hash_lock); | |
2493 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { | |
2494 | unsigned long age; | |
2495 | #ifdef CONFIG_IPV6_PRIVACY | |
2496 | unsigned long regen_advance; | |
2497 | #endif | |
2498 | ||
2499 | if (ifp->flags & IFA_F_PERMANENT) | |
2500 | continue; | |
2501 | ||
2502 | spin_lock(&ifp->lock); | |
2503 | age = (now - ifp->tstamp) / HZ; | |
2504 | ||
2505 | #ifdef CONFIG_IPV6_PRIVACY | |
2506 | regen_advance = ifp->idev->cnf.regen_max_retry * | |
2507 | ifp->idev->cnf.dad_transmits * | |
2508 | ifp->idev->nd_parms->retrans_time / HZ; | |
2509 | #endif | |
2510 | ||
2511 | if (age >= ifp->valid_lft) { | |
2512 | spin_unlock(&ifp->lock); | |
2513 | in6_ifa_hold(ifp); | |
2514 | write_unlock(&addrconf_hash_lock); | |
2515 | ipv6_del_addr(ifp); | |
2516 | goto restart; | |
2517 | } else if (age >= ifp->prefered_lft) { | |
2518 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2519 | int deprecate = 0; | |
2520 | ||
2521 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2522 | deprecate = 1; | |
2523 | ifp->flags |= IFA_F_DEPRECATED; | |
2524 | } | |
2525 | ||
2526 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2527 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2528 | ||
2529 | spin_unlock(&ifp->lock); | |
2530 | ||
2531 | if (deprecate) { | |
2532 | in6_ifa_hold(ifp); | |
2533 | write_unlock(&addrconf_hash_lock); | |
2534 | ||
2535 | ipv6_ifa_notify(0, ifp); | |
2536 | in6_ifa_put(ifp); | |
2537 | goto restart; | |
2538 | } | |
2539 | #ifdef CONFIG_IPV6_PRIVACY | |
2540 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2541 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2542 | if (age >= ifp->prefered_lft - regen_advance) { | |
2543 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2544 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2545 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2546 | if (!ifp->regen_count && ifpub) { | |
2547 | ifp->regen_count++; | |
2548 | in6_ifa_hold(ifp); | |
2549 | in6_ifa_hold(ifpub); | |
2550 | spin_unlock(&ifp->lock); | |
2551 | write_unlock(&addrconf_hash_lock); | |
2552 | ipv6_create_tempaddr(ifpub, ifp); | |
2553 | in6_ifa_put(ifpub); | |
2554 | in6_ifa_put(ifp); | |
2555 | goto restart; | |
2556 | } | |
2557 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2558 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2559 | spin_unlock(&ifp->lock); | |
2560 | #endif | |
2561 | } else { | |
2562 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2563 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2564 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2565 | spin_unlock(&ifp->lock); | |
2566 | } | |
2567 | } | |
2568 | write_unlock(&addrconf_hash_lock); | |
2569 | } | |
2570 | ||
2571 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2572 | add_timer(&addr_chk_timer); | |
2573 | spin_unlock_bh(&addrconf_verify_lock); | |
2574 | } | |
2575 | ||
2576 | static int | |
2577 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2578 | { | |
2579 | struct rtattr **rta = arg; | |
2580 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2581 | struct in6_addr *pfx; | |
2582 | ||
2583 | pfx = NULL; | |
2584 | if (rta[IFA_ADDRESS-1]) { | |
2585 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2586 | return -EINVAL; | |
2587 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2588 | } | |
2589 | if (rta[IFA_LOCAL-1]) { | |
2590 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) | |
2591 | return -EINVAL; | |
2592 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2593 | } | |
2594 | if (pfx == NULL) | |
2595 | return -EINVAL; | |
2596 | ||
2597 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2598 | } | |
2599 | ||
2600 | static int | |
2601 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2602 | { | |
2603 | struct rtattr **rta = arg; | |
2604 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2605 | struct in6_addr *pfx; | |
2606 | ||
2607 | pfx = NULL; | |
2608 | if (rta[IFA_ADDRESS-1]) { | |
2609 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2610 | return -EINVAL; | |
2611 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2612 | } | |
2613 | if (rta[IFA_LOCAL-1]) { | |
2614 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) | |
2615 | return -EINVAL; | |
2616 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2617 | } | |
2618 | if (pfx == NULL) | |
2619 | return -EINVAL; | |
2620 | ||
2621 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2622 | } | |
2623 | ||
2624 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, | |
b6544c0b | 2625 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
2626 | { |
2627 | struct ifaddrmsg *ifm; | |
2628 | struct nlmsghdr *nlh; | |
2629 | struct ifa_cacheinfo ci; | |
2630 | unsigned char *b = skb->tail; | |
2631 | ||
b6544c0b | 2632 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2633 | ifm = NLMSG_DATA(nlh); |
2634 | ifm->ifa_family = AF_INET6; | |
2635 | ifm->ifa_prefixlen = ifa->prefix_len; | |
2636 | ifm->ifa_flags = ifa->flags; | |
2637 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2638 | if (ifa->scope&IFA_HOST) | |
2639 | ifm->ifa_scope = RT_SCOPE_HOST; | |
2640 | else if (ifa->scope&IFA_LINK) | |
2641 | ifm->ifa_scope = RT_SCOPE_LINK; | |
2642 | else if (ifa->scope&IFA_SITE) | |
2643 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2644 | ifm->ifa_index = ifa->idev->dev->ifindex; | |
2645 | RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr); | |
2646 | if (!(ifa->flags&IFA_F_PERMANENT)) { | |
2647 | ci.ifa_prefered = ifa->prefered_lft; | |
2648 | ci.ifa_valid = ifa->valid_lft; | |
2649 | if (ci.ifa_prefered != INFINITY_LIFE_TIME) { | |
2650 | long tval = (jiffies - ifa->tstamp)/HZ; | |
2651 | ci.ifa_prefered -= tval; | |
2652 | if (ci.ifa_valid != INFINITY_LIFE_TIME) | |
2653 | ci.ifa_valid -= tval; | |
2654 | } | |
2655 | } else { | |
2656 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2657 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2658 | } | |
2659 | ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100 | |
2660 | + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
2661 | ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
2662 | + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
2663 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2664 | nlh->nlmsg_len = skb->tail - b; | |
2665 | return skb->len; | |
2666 | ||
2667 | nlmsg_failure: | |
2668 | rtattr_failure: | |
2669 | skb_trim(skb, b - skb->data); | |
2670 | return -1; | |
2671 | } | |
2672 | ||
2673 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 2674 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 LT |
2675 | { |
2676 | struct ifaddrmsg *ifm; | |
2677 | struct nlmsghdr *nlh; | |
2678 | struct ifa_cacheinfo ci; | |
2679 | unsigned char *b = skb->tail; | |
2680 | ||
b6544c0b | 2681 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2682 | ifm = NLMSG_DATA(nlh); |
2683 | ifm->ifa_family = AF_INET6; | |
2684 | ifm->ifa_prefixlen = 128; | |
2685 | ifm->ifa_flags = IFA_F_PERMANENT; | |
2686 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2687 | if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE) | |
2688 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2689 | ifm->ifa_index = ifmca->idev->dev->ifindex; | |
2690 | RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr); | |
2691 | ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ | |
2692 | * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ | |
2693 | * 100 / HZ); | |
2694 | ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ | |
2695 | * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ | |
2696 | * 100 / HZ); | |
2697 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2698 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2699 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2700 | nlh->nlmsg_len = skb->tail - b; | |
2701 | return skb->len; | |
2702 | ||
2703 | nlmsg_failure: | |
2704 | rtattr_failure: | |
2705 | skb_trim(skb, b - skb->data); | |
2706 | return -1; | |
2707 | } | |
2708 | ||
2709 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 2710 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
2711 | { |
2712 | struct ifaddrmsg *ifm; | |
2713 | struct nlmsghdr *nlh; | |
2714 | struct ifa_cacheinfo ci; | |
2715 | unsigned char *b = skb->tail; | |
2716 | ||
b6544c0b | 2717 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2718 | ifm = NLMSG_DATA(nlh); |
2719 | ifm->ifa_family = AF_INET6; | |
2720 | ifm->ifa_prefixlen = 128; | |
2721 | ifm->ifa_flags = IFA_F_PERMANENT; | |
2722 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2723 | if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE) | |
2724 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2725 | ifm->ifa_index = ifaca->aca_idev->dev->ifindex; | |
2726 | RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr); | |
2727 | ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ | |
2728 | * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ | |
2729 | * 100 / HZ); | |
2730 | ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ | |
2731 | * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ | |
2732 | * 100 / HZ); | |
2733 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2734 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2735 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2736 | nlh->nlmsg_len = skb->tail - b; | |
2737 | return skb->len; | |
2738 | ||
2739 | nlmsg_failure: | |
2740 | rtattr_failure: | |
2741 | skb_trim(skb, b - skb->data); | |
2742 | return -1; | |
2743 | } | |
2744 | ||
2745 | enum addr_type_t | |
2746 | { | |
2747 | UNICAST_ADDR, | |
2748 | MULTICAST_ADDR, | |
2749 | ANYCAST_ADDR, | |
2750 | }; | |
2751 | ||
2752 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
2753 | enum addr_type_t type) | |
2754 | { | |
2755 | int idx, ip_idx; | |
2756 | int s_idx, s_ip_idx; | |
2757 | int err = 1; | |
2758 | struct net_device *dev; | |
2759 | struct inet6_dev *idev = NULL; | |
2760 | struct inet6_ifaddr *ifa; | |
2761 | struct ifmcaddr6 *ifmca; | |
2762 | struct ifacaddr6 *ifaca; | |
2763 | ||
2764 | s_idx = cb->args[0]; | |
2765 | s_ip_idx = ip_idx = cb->args[1]; | |
2766 | read_lock(&dev_base_lock); | |
2767 | ||
2768 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
2769 | if (idx < s_idx) | |
2770 | continue; | |
2771 | if (idx > s_idx) | |
2772 | s_ip_idx = 0; | |
2773 | ip_idx = 0; | |
2774 | if ((idev = in6_dev_get(dev)) == NULL) | |
2775 | continue; | |
2776 | read_lock_bh(&idev->lock); | |
2777 | switch (type) { | |
2778 | case UNICAST_ADDR: | |
ae9cda5d | 2779 | /* unicast address incl. temp addr */ |
1da177e4 LT |
2780 | for (ifa = idev->addr_list; ifa; |
2781 | ifa = ifa->if_next, ip_idx++) { | |
2782 | if (ip_idx < s_ip_idx) | |
2783 | continue; | |
2784 | if ((err = inet6_fill_ifaddr(skb, ifa, | |
2785 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
2786 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
2787 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
2788 | goto done; |
2789 | } | |
1da177e4 LT |
2790 | break; |
2791 | case MULTICAST_ADDR: | |
2792 | /* multicast address */ | |
2793 | for (ifmca = idev->mc_list; ifmca; | |
2794 | ifmca = ifmca->next, ip_idx++) { | |
2795 | if (ip_idx < s_ip_idx) | |
2796 | continue; | |
2797 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, | |
2798 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
2799 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
2800 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
2801 | goto done; |
2802 | } | |
2803 | break; | |
2804 | case ANYCAST_ADDR: | |
2805 | /* anycast address */ | |
2806 | for (ifaca = idev->ac_list; ifaca; | |
2807 | ifaca = ifaca->aca_next, ip_idx++) { | |
2808 | if (ip_idx < s_ip_idx) | |
2809 | continue; | |
2810 | if ((err = inet6_fill_ifacaddr(skb, ifaca, | |
2811 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
2812 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
2813 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
2814 | goto done; |
2815 | } | |
2816 | break; | |
2817 | default: | |
2818 | break; | |
2819 | } | |
2820 | read_unlock_bh(&idev->lock); | |
2821 | in6_dev_put(idev); | |
2822 | } | |
2823 | done: | |
2824 | if (err <= 0) { | |
2825 | read_unlock_bh(&idev->lock); | |
2826 | in6_dev_put(idev); | |
2827 | } | |
2828 | read_unlock(&dev_base_lock); | |
2829 | cb->args[0] = idx; | |
2830 | cb->args[1] = ip_idx; | |
2831 | return skb->len; | |
2832 | } | |
2833 | ||
2834 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
2835 | { | |
2836 | enum addr_type_t type = UNICAST_ADDR; | |
2837 | return inet6_dump_addr(skb, cb, type); | |
2838 | } | |
2839 | ||
2840 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
2841 | { | |
2842 | enum addr_type_t type = MULTICAST_ADDR; | |
2843 | return inet6_dump_addr(skb, cb, type); | |
2844 | } | |
2845 | ||
2846 | ||
2847 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
2848 | { | |
2849 | enum addr_type_t type = ANYCAST_ADDR; | |
2850 | return inet6_dump_addr(skb, cb, type); | |
2851 | } | |
2852 | ||
2853 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) | |
2854 | { | |
2855 | struct sk_buff *skb; | |
2856 | int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128); | |
2857 | ||
2858 | skb = alloc_skb(size, GFP_ATOMIC); | |
2859 | if (!skb) { | |
ac6d439d | 2860 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS); |
1da177e4 LT |
2861 | return; |
2862 | } | |
9ed19f33 | 2863 | if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) { |
1da177e4 | 2864 | kfree_skb(skb); |
ac6d439d | 2865 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL); |
1da177e4 LT |
2866 | return; |
2867 | } | |
ac6d439d PM |
2868 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR; |
2869 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC); | |
1da177e4 LT |
2870 | } |
2871 | ||
2872 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
2873 | __s32 *array, int bytes) | |
2874 | { | |
2875 | memset(array, 0, bytes); | |
2876 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
2877 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
2878 | array[DEVCONF_MTU6] = cnf->mtu6; | |
2879 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
2880 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
2881 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
2882 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
2883 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
2884 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
2885 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
2886 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
2887 | #ifdef CONFIG_IPV6_PRIVACY | |
2888 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
2889 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
2890 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
2891 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
2892 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
2893 | #endif | |
2894 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
2895 | } | |
2896 | ||
2897 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, | |
b6544c0b | 2898 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
2899 | { |
2900 | struct net_device *dev = idev->dev; | |
2901 | __s32 *array = NULL; | |
2902 | struct ifinfomsg *r; | |
2903 | struct nlmsghdr *nlh; | |
2904 | unsigned char *b = skb->tail; | |
2905 | struct rtattr *subattr; | |
2906 | __u32 mtu = dev->mtu; | |
2907 | struct ifla_cacheinfo ci; | |
2908 | ||
b6544c0b | 2909 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); |
1da177e4 LT |
2910 | r = NLMSG_DATA(nlh); |
2911 | r->ifi_family = AF_INET6; | |
9ef1d4c7 | 2912 | r->__ifi_pad = 0; |
1da177e4 LT |
2913 | r->ifi_type = dev->type; |
2914 | r->ifi_index = dev->ifindex; | |
2915 | r->ifi_flags = dev_get_flags(dev); | |
2916 | r->ifi_change = 0; | |
2917 | ||
2918 | RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); | |
2919 | ||
2920 | if (dev->addr_len) | |
2921 | RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); | |
2922 | ||
2923 | RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); | |
2924 | if (dev->ifindex != dev->iflink) | |
2925 | RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink); | |
2926 | ||
2927 | subattr = (struct rtattr*)skb->tail; | |
2928 | ||
2929 | RTA_PUT(skb, IFLA_PROTINFO, 0, NULL); | |
2930 | ||
2931 | /* return the device flags */ | |
2932 | RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags); | |
2933 | ||
2934 | /* return interface cacheinfo */ | |
2935 | ci.max_reasm_len = IPV6_MAXPLEN; | |
2936 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
2937 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
2938 | ci.reachable_time = idev->nd_parms->reachable_time; | |
2939 | ci.retrans_time = idev->nd_parms->retrans_time; | |
2940 | RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); | |
2941 | ||
2942 | /* return the device sysctl params */ | |
2943 | if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL) | |
2944 | goto rtattr_failure; | |
2945 | ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array)); | |
2946 | RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array); | |
2947 | ||
2948 | /* XXX - Statistics/MC not implemented */ | |
2949 | subattr->rta_len = skb->tail - (u8*)subattr; | |
2950 | ||
2951 | nlh->nlmsg_len = skb->tail - b; | |
2952 | kfree(array); | |
2953 | return skb->len; | |
2954 | ||
2955 | nlmsg_failure: | |
2956 | rtattr_failure: | |
2957 | if (array) | |
2958 | kfree(array); | |
2959 | skb_trim(skb, b - skb->data); | |
2960 | return -1; | |
2961 | } | |
2962 | ||
2963 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
2964 | { | |
2965 | int idx, err; | |
2966 | int s_idx = cb->args[0]; | |
2967 | struct net_device *dev; | |
2968 | struct inet6_dev *idev; | |
2969 | ||
2970 | read_lock(&dev_base_lock); | |
2971 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
2972 | if (idx < s_idx) | |
2973 | continue; | |
2974 | if ((idev = in6_dev_get(dev)) == NULL) | |
2975 | continue; | |
2976 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, | |
b6544c0b | 2977 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
2978 | in6_dev_put(idev); |
2979 | if (err <= 0) | |
2980 | break; | |
2981 | } | |
2982 | read_unlock(&dev_base_lock); | |
2983 | cb->args[0] = idx; | |
2984 | ||
2985 | return skb->len; | |
2986 | } | |
2987 | ||
2988 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
2989 | { | |
2990 | struct sk_buff *skb; | |
2991 | /* 128 bytes ?? */ | |
2992 | int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128); | |
2993 | ||
2994 | skb = alloc_skb(size, GFP_ATOMIC); | |
2995 | if (!skb) { | |
ac6d439d | 2996 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS); |
1da177e4 LT |
2997 | return; |
2998 | } | |
9ed19f33 | 2999 | if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) { |
1da177e4 | 3000 | kfree_skb(skb); |
ac6d439d | 3001 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL); |
1da177e4 LT |
3002 | return; |
3003 | } | |
ac6d439d PM |
3004 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO; |
3005 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC); | |
1da177e4 LT |
3006 | } |
3007 | ||
3008 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, | |
b6544c0b JHS |
3009 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3010 | int event, unsigned int flags) | |
1da177e4 LT |
3011 | { |
3012 | struct prefixmsg *pmsg; | |
3013 | struct nlmsghdr *nlh; | |
3014 | unsigned char *b = skb->tail; | |
3015 | struct prefix_cacheinfo ci; | |
3016 | ||
b6544c0b | 3017 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); |
1da177e4 LT |
3018 | pmsg = NLMSG_DATA(nlh); |
3019 | pmsg->prefix_family = AF_INET6; | |
8a47077a PM |
3020 | pmsg->prefix_pad1 = 0; |
3021 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3022 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3023 | pmsg->prefix_len = pinfo->prefix_len; | |
3024 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3025 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3026 | |
3027 | pmsg->prefix_flags = 0; | |
3028 | if (pinfo->onlink) | |
3029 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3030 | if (pinfo->autoconf) | |
3031 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3032 | ||
3033 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); | |
3034 | ||
3035 | ci.preferred_time = ntohl(pinfo->prefered); | |
3036 | ci.valid_time = ntohl(pinfo->valid); | |
3037 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); | |
3038 | ||
3039 | nlh->nlmsg_len = skb->tail - b; | |
3040 | return skb->len; | |
3041 | ||
3042 | nlmsg_failure: | |
3043 | rtattr_failure: | |
3044 | skb_trim(skb, b - skb->data); | |
3045 | return -1; | |
3046 | } | |
3047 | ||
3048 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
3049 | struct prefix_info *pinfo) | |
3050 | { | |
3051 | struct sk_buff *skb; | |
3052 | int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128); | |
3053 | ||
3054 | skb = alloc_skb(size, GFP_ATOMIC); | |
3055 | if (!skb) { | |
ac6d439d | 3056 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS); |
1da177e4 LT |
3057 | return; |
3058 | } | |
9ed19f33 | 3059 | if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) { |
1da177e4 | 3060 | kfree_skb(skb); |
ac6d439d | 3061 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL); |
1da177e4 LT |
3062 | return; |
3063 | } | |
ac6d439d PM |
3064 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX; |
3065 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC); | |
1da177e4 LT |
3066 | } |
3067 | ||
db46edc6 | 3068 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3069 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3070 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3071 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
3072 | [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, }, | |
3073 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, | |
3074 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3075 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3076 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3077 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3078 | .dumpit = inet6_dump_fib, }, | |
3079 | }; | |
3080 | ||
3081 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3082 | { | |
3083 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3084 | ||
3085 | switch (event) { | |
3086 | case RTM_NEWADDR: | |
3087 | dst_hold(&ifp->rt->u.dst); | |
0d51aa80 | 3088 | if (ip6_ins_rt(ifp->rt, NULL, NULL, NULL)) |
1da177e4 LT |
3089 | dst_release(&ifp->rt->u.dst); |
3090 | if (ifp->idev->cnf.forwarding) | |
3091 | addrconf_join_anycast(ifp); | |
3092 | break; | |
3093 | case RTM_DELADDR: | |
3094 | if (ifp->idev->cnf.forwarding) | |
3095 | addrconf_leave_anycast(ifp); | |
3096 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3097 | dst_hold(&ifp->rt->u.dst); | |
0d51aa80 | 3098 | if (ip6_del_rt(ifp->rt, NULL, NULL, NULL)) |
1da177e4 LT |
3099 | dst_free(&ifp->rt->u.dst); |
3100 | else | |
3101 | dst_release(&ifp->rt->u.dst); | |
3102 | break; | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3107 | { | |
3108 | read_lock_bh(&addrconf_lock); | |
3109 | if (likely(ifp->idev->dead == 0)) | |
3110 | __ipv6_ifa_notify(event, ifp); | |
3111 | read_unlock_bh(&addrconf_lock); | |
3112 | } | |
3113 | ||
3114 | #ifdef CONFIG_SYSCTL | |
3115 | ||
3116 | static | |
3117 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3118 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3119 | { | |
3120 | int *valp = ctl->data; | |
3121 | int val = *valp; | |
3122 | int ret; | |
3123 | ||
3124 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3125 | ||
3126 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3127 | if (valp != &ipv6_devconf.forwarding) { | |
3128 | if ((!*valp) ^ (!val)) { | |
3129 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3130 | if (idev == NULL) | |
3131 | return ret; | |
3132 | dev_forward_change(idev); | |
3133 | } | |
3134 | } else { | |
3135 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3136 | addrconf_forward_change(); | |
3137 | } | |
3138 | if (*valp) | |
3139 | rt6_purge_dflt_routers(); | |
3140 | } | |
3141 | ||
3142 | return ret; | |
3143 | } | |
3144 | ||
3145 | static int addrconf_sysctl_forward_strategy(ctl_table *table, | |
3146 | int __user *name, int nlen, | |
3147 | void __user *oldval, | |
3148 | size_t __user *oldlenp, | |
3149 | void __user *newval, size_t newlen, | |
3150 | void **context) | |
3151 | { | |
3152 | int *valp = table->data; | |
3153 | int new; | |
3154 | ||
3155 | if (!newval || !newlen) | |
3156 | return 0; | |
3157 | if (newlen != sizeof(int)) | |
3158 | return -EINVAL; | |
3159 | if (get_user(new, (int __user *)newval)) | |
3160 | return -EFAULT; | |
3161 | if (new == *valp) | |
3162 | return 0; | |
3163 | if (oldval && oldlenp) { | |
3164 | size_t len; | |
3165 | if (get_user(len, oldlenp)) | |
3166 | return -EFAULT; | |
3167 | if (len) { | |
3168 | if (len > table->maxlen) | |
3169 | len = table->maxlen; | |
3170 | if (copy_to_user(oldval, valp, len)) | |
3171 | return -EFAULT; | |
3172 | if (put_user(len, oldlenp)) | |
3173 | return -EFAULT; | |
3174 | } | |
3175 | } | |
3176 | ||
3177 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3178 | if (valp != &ipv6_devconf.forwarding) { | |
3179 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3180 | int changed; | |
3181 | if (unlikely(idev == NULL)) | |
3182 | return -ENODEV; | |
3183 | changed = (!*valp) ^ (!new); | |
3184 | *valp = new; | |
3185 | if (changed) | |
3186 | dev_forward_change(idev); | |
3187 | } else { | |
3188 | *valp = new; | |
3189 | addrconf_forward_change(); | |
3190 | } | |
3191 | ||
3192 | if (*valp) | |
3193 | rt6_purge_dflt_routers(); | |
3194 | } else | |
3195 | *valp = new; | |
3196 | ||
3197 | return 1; | |
3198 | } | |
3199 | ||
3200 | static struct addrconf_sysctl_table | |
3201 | { | |
3202 | struct ctl_table_header *sysctl_header; | |
3203 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3204 | ctl_table addrconf_dev[2]; | |
3205 | ctl_table addrconf_conf_dir[2]; | |
3206 | ctl_table addrconf_proto_dir[2]; | |
3207 | ctl_table addrconf_root_dir[2]; | |
3208 | } addrconf_sysctl = { | |
3209 | .sysctl_header = NULL, | |
3210 | .addrconf_vars = { | |
3211 | { | |
3212 | .ctl_name = NET_IPV6_FORWARDING, | |
3213 | .procname = "forwarding", | |
3214 | .data = &ipv6_devconf.forwarding, | |
3215 | .maxlen = sizeof(int), | |
3216 | .mode = 0644, | |
3217 | .proc_handler = &addrconf_sysctl_forward, | |
3218 | .strategy = &addrconf_sysctl_forward_strategy, | |
3219 | }, | |
3220 | { | |
3221 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3222 | .procname = "hop_limit", | |
3223 | .data = &ipv6_devconf.hop_limit, | |
3224 | .maxlen = sizeof(int), | |
3225 | .mode = 0644, | |
3226 | .proc_handler = proc_dointvec, | |
3227 | }, | |
3228 | { | |
3229 | .ctl_name = NET_IPV6_MTU, | |
3230 | .procname = "mtu", | |
3231 | .data = &ipv6_devconf.mtu6, | |
3232 | .maxlen = sizeof(int), | |
3233 | .mode = 0644, | |
3234 | .proc_handler = &proc_dointvec, | |
3235 | }, | |
3236 | { | |
3237 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3238 | .procname = "accept_ra", | |
3239 | .data = &ipv6_devconf.accept_ra, | |
3240 | .maxlen = sizeof(int), | |
3241 | .mode = 0644, | |
3242 | .proc_handler = &proc_dointvec, | |
3243 | }, | |
3244 | { | |
3245 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3246 | .procname = "accept_redirects", | |
3247 | .data = &ipv6_devconf.accept_redirects, | |
3248 | .maxlen = sizeof(int), | |
3249 | .mode = 0644, | |
3250 | .proc_handler = &proc_dointvec, | |
3251 | }, | |
3252 | { | |
3253 | .ctl_name = NET_IPV6_AUTOCONF, | |
3254 | .procname = "autoconf", | |
3255 | .data = &ipv6_devconf.autoconf, | |
3256 | .maxlen = sizeof(int), | |
3257 | .mode = 0644, | |
3258 | .proc_handler = &proc_dointvec, | |
3259 | }, | |
3260 | { | |
3261 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3262 | .procname = "dad_transmits", | |
3263 | .data = &ipv6_devconf.dad_transmits, | |
3264 | .maxlen = sizeof(int), | |
3265 | .mode = 0644, | |
3266 | .proc_handler = &proc_dointvec, | |
3267 | }, | |
3268 | { | |
3269 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3270 | .procname = "router_solicitations", | |
3271 | .data = &ipv6_devconf.rtr_solicits, | |
3272 | .maxlen = sizeof(int), | |
3273 | .mode = 0644, | |
3274 | .proc_handler = &proc_dointvec, | |
3275 | }, | |
3276 | { | |
3277 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3278 | .procname = "router_solicitation_interval", | |
3279 | .data = &ipv6_devconf.rtr_solicit_interval, | |
3280 | .maxlen = sizeof(int), | |
3281 | .mode = 0644, | |
3282 | .proc_handler = &proc_dointvec_jiffies, | |
3283 | .strategy = &sysctl_jiffies, | |
3284 | }, | |
3285 | { | |
3286 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3287 | .procname = "router_solicitation_delay", | |
3288 | .data = &ipv6_devconf.rtr_solicit_delay, | |
3289 | .maxlen = sizeof(int), | |
3290 | .mode = 0644, | |
3291 | .proc_handler = &proc_dointvec_jiffies, | |
3292 | .strategy = &sysctl_jiffies, | |
3293 | }, | |
3294 | { | |
3295 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3296 | .procname = "force_mld_version", | |
3297 | .data = &ipv6_devconf.force_mld_version, | |
3298 | .maxlen = sizeof(int), | |
3299 | .mode = 0644, | |
3300 | .proc_handler = &proc_dointvec, | |
3301 | }, | |
3302 | #ifdef CONFIG_IPV6_PRIVACY | |
3303 | { | |
3304 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3305 | .procname = "use_tempaddr", | |
3306 | .data = &ipv6_devconf.use_tempaddr, | |
3307 | .maxlen = sizeof(int), | |
3308 | .mode = 0644, | |
3309 | .proc_handler = &proc_dointvec, | |
3310 | }, | |
3311 | { | |
3312 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3313 | .procname = "temp_valid_lft", | |
3314 | .data = &ipv6_devconf.temp_valid_lft, | |
3315 | .maxlen = sizeof(int), | |
3316 | .mode = 0644, | |
3317 | .proc_handler = &proc_dointvec, | |
3318 | }, | |
3319 | { | |
3320 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3321 | .procname = "temp_prefered_lft", | |
3322 | .data = &ipv6_devconf.temp_prefered_lft, | |
3323 | .maxlen = sizeof(int), | |
3324 | .mode = 0644, | |
3325 | .proc_handler = &proc_dointvec, | |
3326 | }, | |
3327 | { | |
3328 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3329 | .procname = "regen_max_retry", | |
3330 | .data = &ipv6_devconf.regen_max_retry, | |
3331 | .maxlen = sizeof(int), | |
3332 | .mode = 0644, | |
3333 | .proc_handler = &proc_dointvec, | |
3334 | }, | |
3335 | { | |
3336 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3337 | .procname = "max_desync_factor", | |
3338 | .data = &ipv6_devconf.max_desync_factor, | |
3339 | .maxlen = sizeof(int), | |
3340 | .mode = 0644, | |
3341 | .proc_handler = &proc_dointvec, | |
3342 | }, | |
3343 | #endif | |
3344 | { | |
3345 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3346 | .procname = "max_addresses", | |
3347 | .data = &ipv6_devconf.max_addresses, | |
3348 | .maxlen = sizeof(int), | |
3349 | .mode = 0644, | |
3350 | .proc_handler = &proc_dointvec, | |
3351 | }, | |
3352 | { | |
3353 | .ctl_name = 0, /* sentinel */ | |
3354 | } | |
3355 | }, | |
3356 | .addrconf_dev = { | |
3357 | { | |
3358 | .ctl_name = NET_PROTO_CONF_ALL, | |
3359 | .procname = "all", | |
3360 | .mode = 0555, | |
3361 | .child = addrconf_sysctl.addrconf_vars, | |
3362 | }, | |
3363 | { | |
3364 | .ctl_name = 0, /* sentinel */ | |
3365 | } | |
3366 | }, | |
3367 | .addrconf_conf_dir = { | |
3368 | { | |
3369 | .ctl_name = NET_IPV6_CONF, | |
3370 | .procname = "conf", | |
3371 | .mode = 0555, | |
3372 | .child = addrconf_sysctl.addrconf_dev, | |
3373 | }, | |
3374 | { | |
3375 | .ctl_name = 0, /* sentinel */ | |
3376 | } | |
3377 | }, | |
3378 | .addrconf_proto_dir = { | |
3379 | { | |
3380 | .ctl_name = NET_IPV6, | |
3381 | .procname = "ipv6", | |
3382 | .mode = 0555, | |
3383 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3384 | }, | |
3385 | { | |
3386 | .ctl_name = 0, /* sentinel */ | |
3387 | } | |
3388 | }, | |
3389 | .addrconf_root_dir = { | |
3390 | { | |
3391 | .ctl_name = CTL_NET, | |
3392 | .procname = "net", | |
3393 | .mode = 0555, | |
3394 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3395 | }, | |
3396 | { | |
3397 | .ctl_name = 0, /* sentinel */ | |
3398 | } | |
3399 | }, | |
3400 | }; | |
3401 | ||
3402 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3403 | { | |
3404 | int i; | |
3405 | struct net_device *dev = idev ? idev->dev : NULL; | |
3406 | struct addrconf_sysctl_table *t; | |
3407 | char *dev_name = NULL; | |
3408 | ||
3409 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
3410 | if (t == NULL) | |
3411 | return; | |
3412 | memcpy(t, &addrconf_sysctl, sizeof(*t)); | |
3413 | for (i=0; t->addrconf_vars[i].data; i++) { | |
3414 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
3415 | t->addrconf_vars[i].de = NULL; | |
3416 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
3417 | } | |
3418 | if (dev) { | |
3419 | dev_name = dev->name; | |
3420 | t->addrconf_dev[0].ctl_name = dev->ifindex; | |
3421 | } else { | |
3422 | dev_name = "default"; | |
3423 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3424 | } | |
3425 | ||
3426 | /* | |
3427 | * Make a copy of dev_name, because '.procname' is regarded as const | |
3428 | * by sysctl and we wouldn't want anyone to change it under our feet | |
3429 | * (see SIOCSIFNAME). | |
3430 | */ | |
543537bd | 3431 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3432 | if (!dev_name) |
3433 | goto free; | |
3434 | ||
3435 | t->addrconf_dev[0].procname = dev_name; | |
3436 | ||
3437 | t->addrconf_dev[0].child = t->addrconf_vars; | |
3438 | t->addrconf_dev[0].de = NULL; | |
3439 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
3440 | t->addrconf_conf_dir[0].de = NULL; | |
3441 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
3442 | t->addrconf_proto_dir[0].de = NULL; | |
3443 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
3444 | t->addrconf_root_dir[0].de = NULL; | |
3445 | ||
3446 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
3447 | if (t->sysctl_header == NULL) | |
3448 | goto free_procname; | |
3449 | else | |
3450 | p->sysctl = t; | |
3451 | return; | |
3452 | ||
3453 | /* error path */ | |
3454 | free_procname: | |
3455 | kfree(dev_name); | |
3456 | free: | |
3457 | kfree(t); | |
3458 | ||
3459 | return; | |
3460 | } | |
3461 | ||
3462 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3463 | { | |
3464 | if (p->sysctl) { | |
3465 | struct addrconf_sysctl_table *t = p->sysctl; | |
3466 | p->sysctl = NULL; | |
3467 | unregister_sysctl_table(t->sysctl_header); | |
3468 | kfree(t->addrconf_dev[0].procname); | |
3469 | kfree(t); | |
3470 | } | |
3471 | } | |
3472 | ||
3473 | ||
3474 | #endif | |
3475 | ||
3476 | /* | |
3477 | * Device notifier | |
3478 | */ | |
3479 | ||
3480 | int register_inet6addr_notifier(struct notifier_block *nb) | |
3481 | { | |
3482 | return notifier_chain_register(&inet6addr_chain, nb); | |
3483 | } | |
3484 | ||
3485 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
3486 | { | |
3487 | return notifier_chain_unregister(&inet6addr_chain,nb); | |
3488 | } | |
3489 | ||
3490 | /* | |
3491 | * Init / cleanup code | |
3492 | */ | |
3493 | ||
3494 | int __init addrconf_init(void) | |
3495 | { | |
3496 | int err = 0; | |
3497 | ||
3498 | /* The addrconf netdev notifier requires that loopback_dev | |
3499 | * has it's ipv6 private information allocated and setup | |
3500 | * before it can bring up and give link-local addresses | |
3501 | * to other devices which are up. | |
3502 | * | |
3503 | * Unfortunately, loopback_dev is not necessarily the first | |
3504 | * entry in the global dev_base list of net devices. In fact, | |
3505 | * it is likely to be the very last entry on that list. | |
3506 | * So this causes the notifier registry below to try and | |
3507 | * give link-local addresses to all devices besides loopback_dev | |
3508 | * first, then loopback_dev, which cases all the non-loopback_dev | |
3509 | * devices to fail to get a link-local address. | |
3510 | * | |
3511 | * So, as a temporary fix, allocate the ipv6 structure for | |
3512 | * loopback_dev first by hand. | |
3513 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
3514 | * device and it being up should be removed. | |
3515 | */ | |
3516 | rtnl_lock(); | |
3517 | if (!ipv6_add_dev(&loopback_dev)) | |
3518 | err = -ENOMEM; | |
3519 | rtnl_unlock(); | |
3520 | if (err) | |
3521 | return err; | |
3522 | ||
c62dba90 HX |
3523 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
3524 | ||
1da177e4 LT |
3525 | register_netdevice_notifier(&ipv6_dev_notf); |
3526 | ||
3527 | #ifdef CONFIG_IPV6_PRIVACY | |
3528 | md5_tfm = crypto_alloc_tfm("md5", 0); | |
3529 | if (unlikely(md5_tfm == NULL)) | |
3530 | printk(KERN_WARNING | |
3531 | "failed to load transform for md5\n"); | |
3532 | #endif | |
3533 | ||
3534 | addrconf_verify(0); | |
3535 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
3536 | #ifdef CONFIG_SYSCTL | |
3537 | addrconf_sysctl.sysctl_header = | |
3538 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
3539 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
3540 | #endif | |
3541 | ||
3542 | return 0; | |
3543 | } | |
3544 | ||
3545 | void __exit addrconf_cleanup(void) | |
3546 | { | |
3547 | struct net_device *dev; | |
3548 | struct inet6_dev *idev; | |
3549 | struct inet6_ifaddr *ifa; | |
3550 | int i; | |
3551 | ||
3552 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
3553 | ||
3554 | rtnetlink_links[PF_INET6] = NULL; | |
3555 | #ifdef CONFIG_SYSCTL | |
3556 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
3557 | addrconf_sysctl_unregister(&ipv6_devconf); | |
3558 | #endif | |
3559 | ||
3560 | rtnl_lock(); | |
3561 | ||
3562 | /* | |
3563 | * clean dev list. | |
3564 | */ | |
3565 | ||
3566 | for (dev=dev_base; dev; dev=dev->next) { | |
3567 | if ((idev = __in6_dev_get(dev)) == NULL) | |
3568 | continue; | |
3569 | addrconf_ifdown(dev, 1); | |
3570 | } | |
3571 | addrconf_ifdown(&loopback_dev, 2); | |
3572 | ||
3573 | /* | |
3574 | * Check hash table. | |
3575 | */ | |
3576 | ||
3577 | write_lock_bh(&addrconf_hash_lock); | |
3578 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3579 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
3580 | struct inet6_ifaddr *bifa; | |
3581 | ||
3582 | bifa = ifa; | |
3583 | ifa = ifa->lst_next; | |
3584 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
3585 | /* Do not free it; something is wrong. | |
3586 | Now we can investigate it with debugger. | |
3587 | */ | |
3588 | } | |
3589 | } | |
3590 | write_unlock_bh(&addrconf_hash_lock); | |
3591 | ||
3592 | del_timer(&addr_chk_timer); | |
3593 | ||
3594 | rtnl_unlock(); | |
3595 | ||
3596 | #ifdef CONFIG_IPV6_PRIVACY | |
573dbd95 JJ |
3597 | crypto_free_tfm(md5_tfm); |
3598 | md5_tfm = NULL; | |
1da177e4 LT |
3599 | #endif |
3600 | ||
3601 | #ifdef CONFIG_PROC_FS | |
3602 | proc_net_remove("if_inet6"); | |
3603 | #endif | |
3604 | } |