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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 | * YOSHIFUJI Hideaki @USAGI : improved source address | |
39 | * selection; consider scope, | |
40 | * status etc. | |
41 | */ | |
42 | ||
43 | #include <linux/errno.h> | |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
47 | #include <linux/sched.h> | |
48 | #include <linux/net.h> | |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
51 | #include <linux/if_addr.h> | |
52 | #include <linux/if_arp.h> | |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
58 | #ifdef CONFIG_SYSCTL | |
59 | #include <linux/sysctl.h> | |
60 | #endif | |
61 | #include <linux/capability.h> | |
62 | #include <linux/delay.h> | |
63 | #include <linux/notifier.h> | |
64 | #include <linux/string.h> | |
65 | ||
66 | #include <net/sock.h> | |
67 | #include <net/snmp.h> | |
68 | ||
69 | #include <net/ipv6.h> | |
70 | #include <net/protocol.h> | |
71 | #include <net/ndisc.h> | |
72 | #include <net/ip6_route.h> | |
73 | #include <net/addrconf.h> | |
74 | #include <net/tcp.h> | |
75 | #include <net/ip.h> | |
76 | #include <net/netlink.h> | |
77 | #include <linux/if_tunnel.h> | |
78 | #include <linux/rtnetlink.h> | |
79 | ||
80 | #ifdef CONFIG_IPV6_PRIVACY | |
81 | #include <linux/random.h> | |
82 | #endif | |
83 | ||
84 | #include <asm/uaccess.h> | |
85 | ||
86 | #include <linux/proc_fs.h> | |
87 | #include <linux/seq_file.h> | |
88 | ||
89 | /* Set to 3 to get tracing... */ | |
90 | #define ACONF_DEBUG 2 | |
91 | ||
92 | #if ACONF_DEBUG >= 3 | |
93 | #define ADBG(x) printk x | |
94 | #else | |
95 | #define ADBG(x) | |
96 | #endif | |
97 | ||
98 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
99 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
100 | ||
101 | #ifdef CONFIG_SYSCTL | |
102 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
103 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
104 | #endif | |
105 | ||
106 | #ifdef CONFIG_IPV6_PRIVACY | |
107 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
108 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
109 | static void ipv6_regen_rndid(unsigned long data); | |
110 | ||
111 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
112 | #endif | |
113 | ||
114 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
115 | ||
116 | /* | |
117 | * Configured unicast address hash table | |
118 | */ | |
119 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
120 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
121 | ||
122 | static void addrconf_verify(unsigned long); | |
123 | ||
124 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); | |
125 | static DEFINE_SPINLOCK(addrconf_verify_lock); | |
126 | ||
127 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
128 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
129 | ||
130 | static int addrconf_ifdown(struct net_device *dev, int how); | |
131 | ||
132 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); | |
133 | static void addrconf_dad_timer(unsigned long data); | |
134 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
135 | static void addrconf_dad_run(struct inet6_dev *idev); | |
136 | static void addrconf_rs_timer(unsigned long data); | |
137 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
138 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | ||
140 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
141 | struct prefix_info *pinfo); | |
142 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
143 | ||
144 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); | |
145 | ||
146 | struct ipv6_devconf ipv6_devconf __read_mostly = { | |
147 | .forwarding = 0, | |
148 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
149 | .mtu6 = IPV6_MIN_MTU, | |
150 | .accept_ra = 1, | |
151 | .accept_redirects = 1, | |
152 | .autoconf = 1, | |
153 | .force_mld_version = 0, | |
154 | .dad_transmits = 1, | |
155 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
156 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
157 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
158 | #ifdef CONFIG_IPV6_PRIVACY | |
159 | .use_tempaddr = 0, | |
160 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
161 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
162 | .regen_max_retry = REGEN_MAX_RETRY, | |
163 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
164 | #endif | |
165 | .max_addresses = IPV6_MAX_ADDRESSES, | |
166 | .accept_ra_defrtr = 1, | |
167 | .accept_ra_pinfo = 1, | |
168 | #ifdef CONFIG_IPV6_ROUTER_PREF | |
169 | .accept_ra_rtr_pref = 1, | |
170 | .rtr_probe_interval = 60 * HZ, | |
171 | #ifdef CONFIG_IPV6_ROUTE_INFO | |
172 | .accept_ra_rt_info_max_plen = 0, | |
173 | #endif | |
174 | #endif | |
175 | .proxy_ndp = 0, | |
176 | }; | |
177 | ||
178 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { | |
179 | .forwarding = 0, | |
180 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
181 | .mtu6 = IPV6_MIN_MTU, | |
182 | .accept_ra = 1, | |
183 | .accept_redirects = 1, | |
184 | .autoconf = 1, | |
185 | .dad_transmits = 1, | |
186 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
187 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
188 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
189 | #ifdef CONFIG_IPV6_PRIVACY | |
190 | .use_tempaddr = 0, | |
191 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
192 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
193 | .regen_max_retry = REGEN_MAX_RETRY, | |
194 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
195 | #endif | |
196 | .max_addresses = IPV6_MAX_ADDRESSES, | |
197 | .accept_ra_defrtr = 1, | |
198 | .accept_ra_pinfo = 1, | |
199 | #ifdef CONFIG_IPV6_ROUTER_PREF | |
200 | .accept_ra_rtr_pref = 1, | |
201 | .rtr_probe_interval = 60 * HZ, | |
202 | #ifdef CONFIG_IPV6_ROUTE_INFO | |
203 | .accept_ra_rt_info_max_plen = 0, | |
204 | #endif | |
205 | #endif | |
206 | .proxy_ndp = 0, | |
207 | }; | |
208 | ||
209 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
210 | #if 0 | |
211 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
212 | #endif | |
213 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
214 | ||
215 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) | |
216 | ||
217 | static inline unsigned ipv6_addr_scope2type(unsigned scope) | |
218 | { | |
219 | switch(scope) { | |
220 | case IPV6_ADDR_SCOPE_NODELOCAL: | |
221 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
222 | IPV6_ADDR_LOOPBACK); | |
223 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
224 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
225 | IPV6_ADDR_LINKLOCAL); | |
226 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
227 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
228 | IPV6_ADDR_SITELOCAL); | |
229 | } | |
230 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
231 | } | |
232 | ||
233 | int __ipv6_addr_type(const struct in6_addr *addr) | |
234 | { | |
235 | u32 st; | |
236 | ||
237 | st = addr->s6_addr32[0]; | |
238 | ||
239 | /* Consider all addresses with the first three bits different of | |
240 | 000 and 111 as unicasts. | |
241 | */ | |
242 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
243 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
244 | return (IPV6_ADDR_UNICAST | | |
245 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
246 | ||
247 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { | |
248 | /* multicast */ | |
249 | /* addr-select 3.1 */ | |
250 | return (IPV6_ADDR_MULTICAST | | |
251 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
252 | } | |
253 | ||
254 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
255 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
256 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
257 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) | |
258 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | | |
259 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
260 | ||
261 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
262 | if (addr->s6_addr32[2] == 0) { | |
263 | if (addr->s6_addr32[3] == 0) | |
264 | return IPV6_ADDR_ANY; | |
265 | ||
266 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
267 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | | |
268 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
269 | ||
270 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | | |
271 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
272 | } | |
273 | ||
274 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
275 | return (IPV6_ADDR_MAPPED | | |
276 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
277 | } | |
278 | ||
279 | return (IPV6_ADDR_RESERVED | | |
280 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ | |
281 | } | |
282 | ||
283 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) | |
284 | { | |
285 | if (del_timer(&ifp->timer)) | |
286 | __in6_ifa_put(ifp); | |
287 | } | |
288 | ||
289 | enum addrconf_timer_t | |
290 | { | |
291 | AC_NONE, | |
292 | AC_DAD, | |
293 | AC_RS, | |
294 | }; | |
295 | ||
296 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
297 | enum addrconf_timer_t what, | |
298 | unsigned long when) | |
299 | { | |
300 | if (!del_timer(&ifp->timer)) | |
301 | in6_ifa_hold(ifp); | |
302 | ||
303 | switch (what) { | |
304 | case AC_DAD: | |
305 | ifp->timer.function = addrconf_dad_timer; | |
306 | break; | |
307 | case AC_RS: | |
308 | ifp->timer.function = addrconf_rs_timer; | |
309 | break; | |
310 | default:; | |
311 | } | |
312 | ifp->timer.expires = jiffies + when; | |
313 | add_timer(&ifp->timer); | |
314 | } | |
315 | ||
316 | /* Nobody refers to this device, we may destroy it. */ | |
317 | ||
318 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) | |
319 | { | |
320 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
321 | kfree(idev); | |
322 | } | |
323 | ||
324 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
325 | { | |
326 | struct net_device *dev = idev->dev; | |
327 | BUG_TRAP(idev->addr_list==NULL); | |
328 | BUG_TRAP(idev->mc_list==NULL); | |
329 | #ifdef NET_REFCNT_DEBUG | |
330 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
331 | #endif | |
332 | dev_put(dev); | |
333 | if (!idev->dead) { | |
334 | printk("Freeing alive inet6 device %p\n", idev); | |
335 | return; | |
336 | } | |
337 | snmp6_free_dev(idev); | |
338 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); | |
339 | } | |
340 | ||
341 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
342 | { | |
343 | struct inet6_dev *ndev; | |
344 | ||
345 | ASSERT_RTNL(); | |
346 | ||
347 | if (dev->mtu < IPV6_MIN_MTU) | |
348 | return NULL; | |
349 | ||
350 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); | |
351 | ||
352 | if (ndev == NULL) | |
353 | return NULL; | |
354 | ||
355 | rwlock_init(&ndev->lock); | |
356 | ndev->dev = dev; | |
357 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
358 | ndev->cnf.mtu6 = dev->mtu; | |
359 | ndev->cnf.sysctl = NULL; | |
360 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
361 | if (ndev->nd_parms == NULL) { | |
362 | kfree(ndev); | |
363 | return NULL; | |
364 | } | |
365 | /* We refer to the device */ | |
366 | dev_hold(dev); | |
367 | ||
368 | if (snmp6_alloc_dev(ndev) < 0) { | |
369 | ADBG((KERN_WARNING | |
370 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
371 | __FUNCTION__, dev->name)); | |
372 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
373 | ndev->dead = 1; | |
374 | in6_dev_finish_destroy(ndev); | |
375 | return NULL; | |
376 | } | |
377 | ||
378 | if (snmp6_register_dev(ndev) < 0) { | |
379 | ADBG((KERN_WARNING | |
380 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
381 | __FUNCTION__, dev->name)); | |
382 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
383 | ndev->dead = 1; | |
384 | in6_dev_finish_destroy(ndev); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | /* One reference from device. We must do this before | |
389 | * we invoke __ipv6_regen_rndid(). | |
390 | */ | |
391 | in6_dev_hold(ndev); | |
392 | ||
393 | #ifdef CONFIG_IPV6_PRIVACY | |
394 | init_timer(&ndev->regen_timer); | |
395 | ndev->regen_timer.function = ipv6_regen_rndid; | |
396 | ndev->regen_timer.data = (unsigned long) ndev; | |
397 | if ((dev->flags&IFF_LOOPBACK) || | |
398 | dev->type == ARPHRD_TUNNEL || | |
399 | dev->type == ARPHRD_NONE || | |
400 | dev->type == ARPHRD_SIT) { | |
401 | printk(KERN_INFO | |
402 | "%s: Disabled Privacy Extensions\n", | |
403 | dev->name); | |
404 | ndev->cnf.use_tempaddr = -1; | |
405 | } else { | |
406 | in6_dev_hold(ndev); | |
407 | ipv6_regen_rndid((unsigned long) ndev); | |
408 | } | |
409 | #endif | |
410 | ||
411 | if (netif_carrier_ok(dev)) | |
412 | ndev->if_flags |= IF_READY; | |
413 | ||
414 | /* protected by rtnl_lock */ | |
415 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
416 | ||
417 | ipv6_mc_init_dev(ndev); | |
418 | ndev->tstamp = jiffies; | |
419 | #ifdef CONFIG_SYSCTL | |
420 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, | |
421 | NET_IPV6_NEIGH, "ipv6", | |
422 | &ndisc_ifinfo_sysctl_change, | |
423 | NULL); | |
424 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
425 | #endif | |
426 | return ndev; | |
427 | } | |
428 | ||
429 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
430 | { | |
431 | struct inet6_dev *idev; | |
432 | ||
433 | ASSERT_RTNL(); | |
434 | ||
435 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
436 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | if (dev->flags&IFF_UP) | |
441 | ipv6_mc_up(idev); | |
442 | return idev; | |
443 | } | |
444 | ||
445 | #ifdef CONFIG_SYSCTL | |
446 | static void dev_forward_change(struct inet6_dev *idev) | |
447 | { | |
448 | struct net_device *dev; | |
449 | struct inet6_ifaddr *ifa; | |
450 | struct in6_addr addr; | |
451 | ||
452 | if (!idev) | |
453 | return; | |
454 | dev = idev->dev; | |
455 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
456 | ipv6_addr_all_routers(&addr); | |
457 | ||
458 | if (idev->cnf.forwarding) | |
459 | ipv6_dev_mc_inc(dev, &addr); | |
460 | else | |
461 | ipv6_dev_mc_dec(dev, &addr); | |
462 | } | |
463 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
464 | if (idev->cnf.forwarding) | |
465 | addrconf_join_anycast(ifa); | |
466 | else | |
467 | addrconf_leave_anycast(ifa); | |
468 | } | |
469 | } | |
470 | ||
471 | ||
472 | static void addrconf_forward_change(void) | |
473 | { | |
474 | struct net_device *dev; | |
475 | struct inet6_dev *idev; | |
476 | ||
477 | read_lock(&dev_base_lock); | |
478 | for (dev=dev_base; dev; dev=dev->next) { | |
479 | rcu_read_lock(); | |
480 | idev = __in6_dev_get(dev); | |
481 | if (idev) { | |
482 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
483 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
484 | if (changed) | |
485 | dev_forward_change(idev); | |
486 | } | |
487 | rcu_read_unlock(); | |
488 | } | |
489 | read_unlock(&dev_base_lock); | |
490 | } | |
491 | #endif | |
492 | ||
493 | /* Nobody refers to this ifaddr, destroy it */ | |
494 | ||
495 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
496 | { | |
497 | BUG_TRAP(ifp->if_next==NULL); | |
498 | BUG_TRAP(ifp->lst_next==NULL); | |
499 | #ifdef NET_REFCNT_DEBUG | |
500 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
501 | #endif | |
502 | ||
503 | in6_dev_put(ifp->idev); | |
504 | ||
505 | if (del_timer(&ifp->timer)) | |
506 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
507 | ||
508 | if (!ifp->dead) { | |
509 | printk("Freeing alive inet6 address %p\n", ifp); | |
510 | return; | |
511 | } | |
512 | dst_release(&ifp->rt->u.dst); | |
513 | ||
514 | kfree(ifp); | |
515 | } | |
516 | ||
517 | static void | |
518 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
519 | { | |
520 | struct inet6_ifaddr *ifa, **ifap; | |
521 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); | |
522 | ||
523 | /* | |
524 | * Each device address list is sorted in order of scope - | |
525 | * global before linklocal. | |
526 | */ | |
527 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
528 | ifap = &ifa->if_next) { | |
529 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) | |
530 | break; | |
531 | } | |
532 | ||
533 | ifp->if_next = *ifap; | |
534 | *ifap = ifp; | |
535 | } | |
536 | ||
537 | /* On success it returns ifp with increased reference count */ | |
538 | ||
539 | static struct inet6_ifaddr * | |
540 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
541 | int scope, u32 flags) | |
542 | { | |
543 | struct inet6_ifaddr *ifa = NULL; | |
544 | struct rt6_info *rt; | |
545 | int hash; | |
546 | int err = 0; | |
547 | ||
548 | rcu_read_lock_bh(); | |
549 | if (idev->dead) { | |
550 | err = -ENODEV; /*XXX*/ | |
551 | goto out2; | |
552 | } | |
553 | ||
554 | write_lock(&addrconf_hash_lock); | |
555 | ||
556 | /* Ignore adding duplicate addresses on an interface */ | |
557 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
558 | ADBG(("ipv6_add_addr: already assigned\n")); | |
559 | err = -EEXIST; | |
560 | goto out; | |
561 | } | |
562 | ||
563 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); | |
564 | ||
565 | if (ifa == NULL) { | |
566 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
567 | err = -ENOBUFS; | |
568 | goto out; | |
569 | } | |
570 | ||
571 | rt = addrconf_dst_alloc(idev, addr, 0); | |
572 | if (IS_ERR(rt)) { | |
573 | err = PTR_ERR(rt); | |
574 | goto out; | |
575 | } | |
576 | ||
577 | ipv6_addr_copy(&ifa->addr, addr); | |
578 | ||
579 | spin_lock_init(&ifa->lock); | |
580 | init_timer(&ifa->timer); | |
581 | ifa->timer.data = (unsigned long) ifa; | |
582 | ifa->scope = scope; | |
583 | ifa->prefix_len = pfxlen; | |
584 | ifa->flags = flags | IFA_F_TENTATIVE; | |
585 | ifa->cstamp = ifa->tstamp = jiffies; | |
586 | ||
587 | ifa->rt = rt; | |
588 | ||
589 | ifa->idev = idev; | |
590 | in6_dev_hold(idev); | |
591 | /* For caller */ | |
592 | in6_ifa_hold(ifa); | |
593 | ||
594 | /* Add to big hash table */ | |
595 | hash = ipv6_addr_hash(addr); | |
596 | ||
597 | ifa->lst_next = inet6_addr_lst[hash]; | |
598 | inet6_addr_lst[hash] = ifa; | |
599 | in6_ifa_hold(ifa); | |
600 | write_unlock(&addrconf_hash_lock); | |
601 | ||
602 | write_lock(&idev->lock); | |
603 | /* Add to inet6_dev unicast addr list. */ | |
604 | ipv6_link_dev_addr(idev, ifa); | |
605 | ||
606 | #ifdef CONFIG_IPV6_PRIVACY | |
607 | if (ifa->flags&IFA_F_TEMPORARY) { | |
608 | ifa->tmp_next = idev->tempaddr_list; | |
609 | idev->tempaddr_list = ifa; | |
610 | in6_ifa_hold(ifa); | |
611 | } | |
612 | #endif | |
613 | ||
614 | in6_ifa_hold(ifa); | |
615 | write_unlock(&idev->lock); | |
616 | out2: | |
617 | rcu_read_unlock_bh(); | |
618 | ||
619 | if (likely(err == 0)) | |
620 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); | |
621 | else { | |
622 | kfree(ifa); | |
623 | ifa = ERR_PTR(err); | |
624 | } | |
625 | ||
626 | return ifa; | |
627 | out: | |
628 | write_unlock(&addrconf_hash_lock); | |
629 | goto out2; | |
630 | } | |
631 | ||
632 | /* This function wants to get referenced ifp and releases it before return */ | |
633 | ||
634 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
635 | { | |
636 | struct inet6_ifaddr *ifa, **ifap; | |
637 | struct inet6_dev *idev = ifp->idev; | |
638 | int hash; | |
639 | int deleted = 0, onlink = 0; | |
640 | unsigned long expires = jiffies; | |
641 | ||
642 | hash = ipv6_addr_hash(&ifp->addr); | |
643 | ||
644 | ifp->dead = 1; | |
645 | ||
646 | write_lock_bh(&addrconf_hash_lock); | |
647 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
648 | ifap = &ifa->lst_next) { | |
649 | if (ifa == ifp) { | |
650 | *ifap = ifa->lst_next; | |
651 | __in6_ifa_put(ifp); | |
652 | ifa->lst_next = NULL; | |
653 | break; | |
654 | } | |
655 | } | |
656 | write_unlock_bh(&addrconf_hash_lock); | |
657 | ||
658 | write_lock_bh(&idev->lock); | |
659 | #ifdef CONFIG_IPV6_PRIVACY | |
660 | if (ifp->flags&IFA_F_TEMPORARY) { | |
661 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
662 | ifap = &ifa->tmp_next) { | |
663 | if (ifa == ifp) { | |
664 | *ifap = ifa->tmp_next; | |
665 | if (ifp->ifpub) { | |
666 | in6_ifa_put(ifp->ifpub); | |
667 | ifp->ifpub = NULL; | |
668 | } | |
669 | __in6_ifa_put(ifp); | |
670 | ifa->tmp_next = NULL; | |
671 | break; | |
672 | } | |
673 | } | |
674 | } | |
675 | #endif | |
676 | ||
677 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { | |
678 | if (ifa == ifp) { | |
679 | *ifap = ifa->if_next; | |
680 | __in6_ifa_put(ifp); | |
681 | ifa->if_next = NULL; | |
682 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
683 | break; | |
684 | deleted = 1; | |
685 | continue; | |
686 | } else if (ifp->flags & IFA_F_PERMANENT) { | |
687 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
688 | ifp->prefix_len)) { | |
689 | if (ifa->flags & IFA_F_PERMANENT) { | |
690 | onlink = 1; | |
691 | if (deleted) | |
692 | break; | |
693 | } else { | |
694 | unsigned long lifetime; | |
695 | ||
696 | if (!onlink) | |
697 | onlink = -1; | |
698 | ||
699 | spin_lock(&ifa->lock); | |
700 | lifetime = min_t(unsigned long, | |
701 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
702 | if (time_before(expires, | |
703 | ifa->tstamp + lifetime * HZ)) | |
704 | expires = ifa->tstamp + lifetime * HZ; | |
705 | spin_unlock(&ifa->lock); | |
706 | } | |
707 | } | |
708 | } | |
709 | ifap = &ifa->if_next; | |
710 | } | |
711 | write_unlock_bh(&idev->lock); | |
712 | ||
713 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
714 | ||
715 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); | |
716 | ||
717 | addrconf_del_timer(ifp); | |
718 | ||
719 | /* | |
720 | * Purge or update corresponding prefix | |
721 | * | |
722 | * 1) we don't purge prefix here if address was not permanent. | |
723 | * prefix is managed by its own lifetime. | |
724 | * 2) if there're no addresses, delete prefix. | |
725 | * 3) if there're still other permanent address(es), | |
726 | * corresponding prefix is still permanent. | |
727 | * 4) otherwise, update prefix lifetime to the | |
728 | * longest valid lifetime among the corresponding | |
729 | * addresses on the device. | |
730 | * Note: subsequent RA will update lifetime. | |
731 | * | |
732 | * --yoshfuji | |
733 | */ | |
734 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
735 | struct in6_addr prefix; | |
736 | struct rt6_info *rt; | |
737 | ||
738 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
739 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
740 | ||
741 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
742 | if (onlink == 0) { | |
743 | ip6_del_rt(rt); | |
744 | rt = NULL; | |
745 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
746 | rt->rt6i_expires = expires; | |
747 | rt->rt6i_flags |= RTF_EXPIRES; | |
748 | } | |
749 | } | |
750 | dst_release(&rt->u.dst); | |
751 | } | |
752 | ||
753 | in6_ifa_put(ifp); | |
754 | } | |
755 | ||
756 | #ifdef CONFIG_IPV6_PRIVACY | |
757 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
758 | { | |
759 | struct inet6_dev *idev = ifp->idev; | |
760 | struct in6_addr addr, *tmpaddr; | |
761 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
762 | int tmp_plen; | |
763 | int ret = 0; | |
764 | int max_addresses; | |
765 | ||
766 | write_lock(&idev->lock); | |
767 | if (ift) { | |
768 | spin_lock_bh(&ift->lock); | |
769 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
770 | spin_unlock_bh(&ift->lock); | |
771 | tmpaddr = &addr; | |
772 | } else { | |
773 | tmpaddr = NULL; | |
774 | } | |
775 | retry: | |
776 | in6_dev_hold(idev); | |
777 | if (idev->cnf.use_tempaddr <= 0) { | |
778 | write_unlock(&idev->lock); | |
779 | printk(KERN_INFO | |
780 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
781 | in6_dev_put(idev); | |
782 | ret = -1; | |
783 | goto out; | |
784 | } | |
785 | spin_lock_bh(&ifp->lock); | |
786 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
787 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
788 | spin_unlock_bh(&ifp->lock); | |
789 | write_unlock(&idev->lock); | |
790 | printk(KERN_WARNING | |
791 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
792 | in6_dev_put(idev); | |
793 | ret = -1; | |
794 | goto out; | |
795 | } | |
796 | in6_ifa_hold(ifp); | |
797 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
798 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
799 | spin_unlock_bh(&ifp->lock); | |
800 | write_unlock(&idev->lock); | |
801 | printk(KERN_WARNING | |
802 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
803 | in6_ifa_put(ifp); | |
804 | in6_dev_put(idev); | |
805 | ret = -1; | |
806 | goto out; | |
807 | } | |
808 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
809 | tmp_valid_lft = min_t(__u32, | |
810 | ifp->valid_lft, | |
811 | idev->cnf.temp_valid_lft); | |
812 | tmp_prefered_lft = min_t(__u32, | |
813 | ifp->prefered_lft, | |
814 | idev->cnf.temp_prefered_lft - desync_factor / HZ); | |
815 | tmp_plen = ifp->prefix_len; | |
816 | max_addresses = idev->cnf.max_addresses; | |
817 | tmp_cstamp = ifp->cstamp; | |
818 | tmp_tstamp = ifp->tstamp; | |
819 | spin_unlock_bh(&ifp->lock); | |
820 | ||
821 | write_unlock(&idev->lock); | |
822 | ift = !max_addresses || | |
823 | ipv6_count_addresses(idev) < max_addresses ? | |
824 | ipv6_add_addr(idev, &addr, tmp_plen, | |
825 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
826 | if (!ift || IS_ERR(ift)) { | |
827 | in6_ifa_put(ifp); | |
828 | in6_dev_put(idev); | |
829 | printk(KERN_INFO | |
830 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
831 | tmpaddr = &addr; | |
832 | write_lock(&idev->lock); | |
833 | goto retry; | |
834 | } | |
835 | ||
836 | spin_lock_bh(&ift->lock); | |
837 | ift->ifpub = ifp; | |
838 | ift->valid_lft = tmp_valid_lft; | |
839 | ift->prefered_lft = tmp_prefered_lft; | |
840 | ift->cstamp = tmp_cstamp; | |
841 | ift->tstamp = tmp_tstamp; | |
842 | spin_unlock_bh(&ift->lock); | |
843 | ||
844 | addrconf_dad_start(ift, 0); | |
845 | in6_ifa_put(ift); | |
846 | in6_dev_put(idev); | |
847 | out: | |
848 | return ret; | |
849 | } | |
850 | #endif | |
851 | ||
852 | /* | |
853 | * Choose an appropriate source address (RFC3484) | |
854 | */ | |
855 | struct ipv6_saddr_score { | |
856 | int addr_type; | |
857 | unsigned int attrs; | |
858 | int matchlen; | |
859 | int scope; | |
860 | unsigned int rule; | |
861 | }; | |
862 | ||
863 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
864 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
865 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
866 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
867 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
868 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
869 | ||
870 | static int inline ipv6_saddr_preferred(int type) | |
871 | { | |
872 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| | |
873 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
874 | return 1; | |
875 | return 0; | |
876 | } | |
877 | ||
878 | /* static matching label */ | |
879 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
880 | { | |
881 | /* | |
882 | * prefix (longest match) label | |
883 | * ----------------------------- | |
884 | * ::1/128 0 | |
885 | * ::/0 1 | |
886 | * 2002::/16 2 | |
887 | * ::/96 3 | |
888 | * ::ffff:0:0/96 4 | |
889 | * fc00::/7 5 | |
890 | * 2001::/32 6 | |
891 | */ | |
892 | if (type & IPV6_ADDR_LOOPBACK) | |
893 | return 0; | |
894 | else if (type & IPV6_ADDR_COMPATv4) | |
895 | return 3; | |
896 | else if (type & IPV6_ADDR_MAPPED) | |
897 | return 4; | |
898 | else if (addr->s6_addr32[0] == htonl(0x20010000)) | |
899 | return 6; | |
900 | else if (addr->s6_addr16[0] == htons(0x2002)) | |
901 | return 2; | |
902 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) | |
903 | return 5; | |
904 | return 1; | |
905 | } | |
906 | ||
907 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, | |
908 | struct in6_addr *daddr, struct in6_addr *saddr) | |
909 | { | |
910 | struct ipv6_saddr_score hiscore; | |
911 | struct inet6_ifaddr *ifa_result = NULL; | |
912 | int daddr_type = __ipv6_addr_type(daddr); | |
913 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
914 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
915 | struct net_device *dev; | |
916 | ||
917 | memset(&hiscore, 0, sizeof(hiscore)); | |
918 | ||
919 | read_lock(&dev_base_lock); | |
920 | rcu_read_lock(); | |
921 | ||
922 | for (dev = dev_base; dev; dev=dev->next) { | |
923 | struct inet6_dev *idev; | |
924 | struct inet6_ifaddr *ifa; | |
925 | ||
926 | /* Rule 0: Candidate Source Address (section 4) | |
927 | * - multicast and link-local destination address, | |
928 | * the set of candidate source address MUST only | |
929 | * include addresses assigned to interfaces | |
930 | * belonging to the same link as the outgoing | |
931 | * interface. | |
932 | * (- For site-local destination addresses, the | |
933 | * set of candidate source addresses MUST only | |
934 | * include addresses assigned to interfaces | |
935 | * belonging to the same site as the outgoing | |
936 | * interface.) | |
937 | */ | |
938 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
939 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
940 | daddr_dev && dev != daddr_dev) | |
941 | continue; | |
942 | ||
943 | idev = __in6_dev_get(dev); | |
944 | if (!idev) | |
945 | continue; | |
946 | ||
947 | read_lock_bh(&idev->lock); | |
948 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
949 | struct ipv6_saddr_score score; | |
950 | ||
951 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
952 | ||
953 | /* Rule 0: | |
954 | * - Tentative Address (RFC2462 section 5.4) | |
955 | * - A tentative address is not considered | |
956 | * "assigned to an interface" in the traditional | |
957 | * sense. | |
958 | * - Candidate Source Address (section 4) | |
959 | * - In any case, anycast addresses, multicast | |
960 | * addresses, and the unspecified address MUST | |
961 | * NOT be included in a candidate set. | |
962 | */ | |
963 | if (ifa->flags & IFA_F_TENTATIVE) | |
964 | continue; | |
965 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || | |
966 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
967 | LIMIT_NETDEBUG(KERN_DEBUG | |
968 | "ADDRCONF: unspecified / multicast address" | |
969 | "assigned as unicast address on %s", | |
970 | dev->name); | |
971 | continue; | |
972 | } | |
973 | ||
974 | score.attrs = 0; | |
975 | score.matchlen = 0; | |
976 | score.scope = 0; | |
977 | score.rule = 0; | |
978 | ||
979 | if (ifa_result == NULL) { | |
980 | /* record it if the first available entry */ | |
981 | goto record_it; | |
982 | } | |
983 | ||
984 | /* Rule 1: Prefer same address */ | |
985 | if (hiscore.rule < 1) { | |
986 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
987 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
988 | hiscore.rule++; | |
989 | } | |
990 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
991 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
992 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
993 | score.rule = 1; | |
994 | goto record_it; | |
995 | } | |
996 | } else { | |
997 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
998 | continue; | |
999 | } | |
1000 | ||
1001 | /* Rule 2: Prefer appropriate scope */ | |
1002 | if (hiscore.rule < 2) { | |
1003 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
1004 | hiscore.rule++; | |
1005 | } | |
1006 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1007 | if (hiscore.scope < score.scope) { | |
1008 | if (hiscore.scope < daddr_scope) { | |
1009 | score.rule = 2; | |
1010 | goto record_it; | |
1011 | } else | |
1012 | continue; | |
1013 | } else if (score.scope < hiscore.scope) { | |
1014 | if (score.scope < daddr_scope) | |
1015 | break; /* addresses sorted by scope */ | |
1016 | else { | |
1017 | score.rule = 2; | |
1018 | goto record_it; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | /* Rule 3: Avoid deprecated address */ | |
1023 | if (hiscore.rule < 3) { | |
1024 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
1025 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
1026 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1027 | hiscore.rule++; | |
1028 | } | |
1029 | if (ipv6_saddr_preferred(score.addr_type) || | |
1030 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
1031 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1032 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1033 | score.rule = 3; | |
1034 | goto record_it; | |
1035 | } | |
1036 | } else { | |
1037 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1038 | continue; | |
1039 | } | |
1040 | ||
1041 | /* Rule 4: Prefer home address -- not implemented yet */ | |
1042 | if (hiscore.rule < 4) | |
1043 | hiscore.rule++; | |
1044 | ||
1045 | /* Rule 5: Prefer outgoing interface */ | |
1046 | if (hiscore.rule < 5) { | |
1047 | if (daddr_dev == NULL || | |
1048 | daddr_dev == ifa_result->idev->dev) | |
1049 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1050 | hiscore.rule++; | |
1051 | } | |
1052 | if (daddr_dev == NULL || | |
1053 | daddr_dev == ifa->idev->dev) { | |
1054 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1055 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1056 | score.rule = 5; | |
1057 | goto record_it; | |
1058 | } | |
1059 | } else { | |
1060 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1061 | continue; | |
1062 | } | |
1063 | ||
1064 | /* Rule 6: Prefer matching label */ | |
1065 | if (hiscore.rule < 6) { | |
1066 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1067 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1068 | hiscore.rule++; | |
1069 | } | |
1070 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1071 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1072 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1073 | score.rule = 6; | |
1074 | goto record_it; | |
1075 | } | |
1076 | } else { | |
1077 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1078 | continue; | |
1079 | } | |
1080 | ||
1081 | #ifdef CONFIG_IPV6_PRIVACY | |
1082 | /* Rule 7: Prefer public address | |
1083 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1084 | */ | |
1085 | if (hiscore.rule < 7) { | |
1086 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1087 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1088 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1089 | hiscore.rule++; | |
1090 | } | |
1091 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1092 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1093 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1094 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1095 | score.rule = 7; | |
1096 | goto record_it; | |
1097 | } | |
1098 | } else { | |
1099 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1100 | continue; | |
1101 | } | |
1102 | #else | |
1103 | if (hiscore.rule < 7) | |
1104 | hiscore.rule++; | |
1105 | #endif | |
1106 | /* Rule 8: Use longest matching prefix */ | |
1107 | if (hiscore.rule < 8) { | |
1108 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); | |
1109 | hiscore.rule++; | |
1110 | } | |
1111 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); | |
1112 | if (score.matchlen > hiscore.matchlen) { | |
1113 | score.rule = 8; | |
1114 | goto record_it; | |
1115 | } | |
1116 | #if 0 | |
1117 | else if (score.matchlen < hiscore.matchlen) | |
1118 | continue; | |
1119 | #endif | |
1120 | ||
1121 | /* Final Rule: choose first available one */ | |
1122 | continue; | |
1123 | record_it: | |
1124 | if (ifa_result) | |
1125 | in6_ifa_put(ifa_result); | |
1126 | in6_ifa_hold(ifa); | |
1127 | ifa_result = ifa; | |
1128 | hiscore = score; | |
1129 | } | |
1130 | read_unlock_bh(&idev->lock); | |
1131 | } | |
1132 | rcu_read_unlock(); | |
1133 | read_unlock(&dev_base_lock); | |
1134 | ||
1135 | if (!ifa_result) | |
1136 | return -EADDRNOTAVAIL; | |
1137 | ||
1138 | ipv6_addr_copy(saddr, &ifa_result->addr); | |
1139 | in6_ifa_put(ifa_result); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | int ipv6_get_saddr(struct dst_entry *dst, | |
1145 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1146 | { | |
1147 | return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr); | |
1148 | } | |
1149 | ||
1150 | ||
1151 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1152 | { | |
1153 | struct inet6_dev *idev; | |
1154 | int err = -EADDRNOTAVAIL; | |
1155 | ||
1156 | rcu_read_lock(); | |
1157 | if ((idev = __in6_dev_get(dev)) != NULL) { | |
1158 | struct inet6_ifaddr *ifp; | |
1159 | ||
1160 | read_lock_bh(&idev->lock); | |
1161 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1162 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1163 | ipv6_addr_copy(addr, &ifp->addr); | |
1164 | err = 0; | |
1165 | break; | |
1166 | } | |
1167 | } | |
1168 | read_unlock_bh(&idev->lock); | |
1169 | } | |
1170 | rcu_read_unlock(); | |
1171 | return err; | |
1172 | } | |
1173 | ||
1174 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1175 | { | |
1176 | int cnt = 0; | |
1177 | struct inet6_ifaddr *ifp; | |
1178 | ||
1179 | read_lock_bh(&idev->lock); | |
1180 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1181 | cnt++; | |
1182 | read_unlock_bh(&idev->lock); | |
1183 | return cnt; | |
1184 | } | |
1185 | ||
1186 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1187 | { | |
1188 | struct inet6_ifaddr * ifp; | |
1189 | u8 hash = ipv6_addr_hash(addr); | |
1190 | ||
1191 | read_lock_bh(&addrconf_hash_lock); | |
1192 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1193 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1194 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1195 | if (dev == NULL || ifp->idev->dev == dev || | |
1196 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1197 | break; | |
1198 | } | |
1199 | } | |
1200 | read_unlock_bh(&addrconf_hash_lock); | |
1201 | return ifp != NULL; | |
1202 | } | |
1203 | ||
1204 | static | |
1205 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1206 | { | |
1207 | struct inet6_ifaddr * ifp; | |
1208 | u8 hash = ipv6_addr_hash(addr); | |
1209 | ||
1210 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1211 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1212 | if (dev == NULL || ifp->idev->dev == dev) | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | return ifp != NULL; | |
1217 | } | |
1218 | ||
1219 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1220 | { | |
1221 | struct inet6_ifaddr * ifp; | |
1222 | u8 hash = ipv6_addr_hash(addr); | |
1223 | ||
1224 | read_lock_bh(&addrconf_hash_lock); | |
1225 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1226 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1227 | if (dev == NULL || ifp->idev->dev == dev || | |
1228 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1229 | in6_ifa_hold(ifp); | |
1230 | break; | |
1231 | } | |
1232 | } | |
1233 | } | |
1234 | read_unlock_bh(&addrconf_hash_lock); | |
1235 | ||
1236 | return ifp; | |
1237 | } | |
1238 | ||
1239 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1240 | { | |
1241 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
1242 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
1243 | u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; | |
1244 | u32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1245 | int sk_ipv6only = ipv6_only_sock(sk); | |
1246 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
1247 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
1248 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1249 | ||
1250 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1251 | return 1; | |
1252 | ||
1253 | if (addr_type2 == IPV6_ADDR_ANY && | |
1254 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1255 | return 1; | |
1256 | ||
1257 | if (addr_type == IPV6_ADDR_ANY && | |
1258 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1259 | return 1; | |
1260 | ||
1261 | if (sk2_rcv_saddr6 && | |
1262 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1263 | return 1; | |
1264 | ||
1265 | if (addr_type == IPV6_ADDR_MAPPED && | |
1266 | !sk2_ipv6only && | |
1267 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1268 | return 1; | |
1269 | ||
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | /* Gets referenced address, destroys ifaddr */ | |
1274 | ||
1275 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) | |
1276 | { | |
1277 | if (ifp->flags&IFA_F_PERMANENT) { | |
1278 | spin_lock_bh(&ifp->lock); | |
1279 | addrconf_del_timer(ifp); | |
1280 | ifp->flags |= IFA_F_TENTATIVE; | |
1281 | spin_unlock_bh(&ifp->lock); | |
1282 | in6_ifa_put(ifp); | |
1283 | #ifdef CONFIG_IPV6_PRIVACY | |
1284 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1285 | struct inet6_ifaddr *ifpub; | |
1286 | spin_lock_bh(&ifp->lock); | |
1287 | ifpub = ifp->ifpub; | |
1288 | if (ifpub) { | |
1289 | in6_ifa_hold(ifpub); | |
1290 | spin_unlock_bh(&ifp->lock); | |
1291 | ipv6_create_tempaddr(ifpub, ifp); | |
1292 | in6_ifa_put(ifpub); | |
1293 | } else { | |
1294 | spin_unlock_bh(&ifp->lock); | |
1295 | } | |
1296 | ipv6_del_addr(ifp); | |
1297 | #endif | |
1298 | } else | |
1299 | ipv6_del_addr(ifp); | |
1300 | } | |
1301 | ||
1302 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) | |
1303 | { | |
1304 | if (net_ratelimit()) | |
1305 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1306 | addrconf_dad_stop(ifp); | |
1307 | } | |
1308 | ||
1309 | /* Join to solicited addr multicast group. */ | |
1310 | ||
1311 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1312 | { | |
1313 | struct in6_addr maddr; | |
1314 | ||
1315 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1316 | return; | |
1317 | ||
1318 | addrconf_addr_solict_mult(addr, &maddr); | |
1319 | ipv6_dev_mc_inc(dev, &maddr); | |
1320 | } | |
1321 | ||
1322 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1323 | { | |
1324 | struct in6_addr maddr; | |
1325 | ||
1326 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1327 | return; | |
1328 | ||
1329 | addrconf_addr_solict_mult(addr, &maddr); | |
1330 | __ipv6_dev_mc_dec(idev, &maddr); | |
1331 | } | |
1332 | ||
1333 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) | |
1334 | { | |
1335 | struct in6_addr addr; | |
1336 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1337 | if (ipv6_addr_any(&addr)) | |
1338 | return; | |
1339 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1340 | } | |
1341 | ||
1342 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) | |
1343 | { | |
1344 | struct in6_addr addr; | |
1345 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1346 | if (ipv6_addr_any(&addr)) | |
1347 | return; | |
1348 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1349 | } | |
1350 | ||
1351 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) | |
1352 | { | |
1353 | if (dev->addr_len != ETH_ALEN) | |
1354 | return -1; | |
1355 | memcpy(eui, dev->dev_addr, 3); | |
1356 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1357 | ||
1358 | /* | |
1359 | * The zSeries OSA network cards can be shared among various | |
1360 | * OS instances, but the OSA cards have only one MAC address. | |
1361 | * This leads to duplicate address conflicts in conjunction | |
1362 | * with IPv6 if more than one instance uses the same card. | |
1363 | * | |
1364 | * The driver for these cards can deliver a unique 16-bit | |
1365 | * identifier for each instance sharing the same card. It is | |
1366 | * placed instead of 0xFFFE in the interface identifier. The | |
1367 | * "u" bit of the interface identifier is not inverted in this | |
1368 | * case. Hence the resulting interface identifier has local | |
1369 | * scope according to RFC2373. | |
1370 | */ | |
1371 | if (dev->dev_id) { | |
1372 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1373 | eui[4] = dev->dev_id & 0xFF; | |
1374 | } else { | |
1375 | eui[3] = 0xFF; | |
1376 | eui[4] = 0xFE; | |
1377 | eui[0] ^= 2; | |
1378 | } | |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1383 | { | |
1384 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1385 | if (dev->addr_len != ARCNET_ALEN) | |
1386 | return -1; | |
1387 | memset(eui, 0, 7); | |
1388 | eui[7] = *(u8*)dev->dev_addr; | |
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1393 | { | |
1394 | if (dev->addr_len != INFINIBAND_ALEN) | |
1395 | return -1; | |
1396 | memcpy(eui, dev->dev_addr + 12, 8); | |
1397 | eui[0] |= 2; | |
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) | |
1402 | { | |
1403 | switch (dev->type) { | |
1404 | case ARPHRD_ETHER: | |
1405 | case ARPHRD_FDDI: | |
1406 | case ARPHRD_IEEE802_TR: | |
1407 | return addrconf_ifid_eui48(eui, dev); | |
1408 | case ARPHRD_ARCNET: | |
1409 | return addrconf_ifid_arcnet(eui, dev); | |
1410 | case ARPHRD_INFINIBAND: | |
1411 | return addrconf_ifid_infiniband(eui, dev); | |
1412 | } | |
1413 | return -1; | |
1414 | } | |
1415 | ||
1416 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1417 | { | |
1418 | int err = -1; | |
1419 | struct inet6_ifaddr *ifp; | |
1420 | ||
1421 | read_lock_bh(&idev->lock); | |
1422 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1423 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1424 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1425 | err = 0; | |
1426 | break; | |
1427 | } | |
1428 | } | |
1429 | read_unlock_bh(&idev->lock); | |
1430 | return err; | |
1431 | } | |
1432 | ||
1433 | #ifdef CONFIG_IPV6_PRIVACY | |
1434 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1435 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1436 | { | |
1437 | regen: | |
1438 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); | |
1439 | idev->rndid[0] &= ~0x02; | |
1440 | ||
1441 | /* | |
1442 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1443 | * check if generated address is not inappropriate | |
1444 | * | |
1445 | * - Reserved subnet anycast (RFC 2526) | |
1446 | * 11111101 11....11 1xxxxxxx | |
1447 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1448 | * 00-00-5E-FE-xx-xx-xx-xx | |
1449 | * - value 0 | |
1450 | * - XXX: already assigned to an address on the device | |
1451 | */ | |
1452 | if (idev->rndid[0] == 0xfd && | |
1453 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && | |
1454 | (idev->rndid[7]&0x80)) | |
1455 | goto regen; | |
1456 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1457 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1458 | goto regen; | |
1459 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1460 | goto regen; | |
1461 | } | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | static void ipv6_regen_rndid(unsigned long data) | |
1467 | { | |
1468 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1469 | unsigned long expires; | |
1470 | ||
1471 | rcu_read_lock_bh(); | |
1472 | write_lock_bh(&idev->lock); | |
1473 | ||
1474 | if (idev->dead) | |
1475 | goto out; | |
1476 | ||
1477 | if (__ipv6_regen_rndid(idev) < 0) | |
1478 | goto out; | |
1479 | ||
1480 | expires = jiffies + | |
1481 | idev->cnf.temp_prefered_lft * HZ - | |
1482 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; | |
1483 | if (time_before(expires, jiffies)) { | |
1484 | printk(KERN_WARNING | |
1485 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1486 | idev->dev->name); | |
1487 | goto out; | |
1488 | } | |
1489 | ||
1490 | if (!mod_timer(&idev->regen_timer, expires)) | |
1491 | in6_dev_hold(idev); | |
1492 | ||
1493 | out: | |
1494 | write_unlock_bh(&idev->lock); | |
1495 | rcu_read_unlock_bh(); | |
1496 | in6_dev_put(idev); | |
1497 | } | |
1498 | ||
1499 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1500 | int ret = 0; | |
1501 | ||
1502 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1503 | ret = __ipv6_regen_rndid(idev); | |
1504 | return ret; | |
1505 | } | |
1506 | #endif | |
1507 | ||
1508 | /* | |
1509 | * Add prefix route. | |
1510 | */ | |
1511 | ||
1512 | static void | |
1513 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
1514 | unsigned long expires, u32 flags) | |
1515 | { | |
1516 | struct fib6_config cfg = { | |
1517 | .fc_table = RT6_TABLE_PREFIX, | |
1518 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1519 | .fc_ifindex = dev->ifindex, | |
1520 | .fc_expires = expires, | |
1521 | .fc_dst_len = plen, | |
1522 | .fc_flags = RTF_UP | flags, | |
1523 | }; | |
1524 | ||
1525 | ipv6_addr_copy(&cfg.fc_dst, pfx); | |
1526 | ||
1527 | /* Prevent useless cloning on PtP SIT. | |
1528 | This thing is done here expecting that the whole | |
1529 | class of non-broadcast devices need not cloning. | |
1530 | */ | |
1531 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) | |
1532 | cfg.fc_flags |= RTF_NONEXTHOP; | |
1533 | ||
1534 | ip6_route_add(&cfg); | |
1535 | } | |
1536 | ||
1537 | /* Create "default" multicast route to the interface */ | |
1538 | ||
1539 | static void addrconf_add_mroute(struct net_device *dev) | |
1540 | { | |
1541 | struct fib6_config cfg = { | |
1542 | .fc_table = RT6_TABLE_LOCAL, | |
1543 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1544 | .fc_ifindex = dev->ifindex, | |
1545 | .fc_dst_len = 8, | |
1546 | .fc_flags = RTF_UP, | |
1547 | }; | |
1548 | ||
1549 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1550 | ||
1551 | ip6_route_add(&cfg); | |
1552 | } | |
1553 | ||
1554 | static void sit_route_add(struct net_device *dev) | |
1555 | { | |
1556 | struct fib6_config cfg = { | |
1557 | .fc_table = RT6_TABLE_MAIN, | |
1558 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1559 | .fc_ifindex = dev->ifindex, | |
1560 | .fc_dst_len = 96, | |
1561 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1562 | }; | |
1563 | ||
1564 | /* prefix length - 96 bits "::d.d.d.d" */ | |
1565 | ip6_route_add(&cfg); | |
1566 | } | |
1567 | ||
1568 | static void addrconf_add_lroute(struct net_device *dev) | |
1569 | { | |
1570 | struct in6_addr addr; | |
1571 | ||
1572 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1573 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1574 | } | |
1575 | ||
1576 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1577 | { | |
1578 | struct inet6_dev *idev; | |
1579 | ||
1580 | ASSERT_RTNL(); | |
1581 | ||
1582 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1583 | return NULL; | |
1584 | ||
1585 | /* Add default multicast route */ | |
1586 | addrconf_add_mroute(dev); | |
1587 | ||
1588 | /* Add link local route */ | |
1589 | addrconf_add_lroute(dev); | |
1590 | return idev; | |
1591 | } | |
1592 | ||
1593 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1594 | { | |
1595 | struct prefix_info *pinfo; | |
1596 | __u32 valid_lft; | |
1597 | __u32 prefered_lft; | |
1598 | int addr_type; | |
1599 | unsigned long rt_expires; | |
1600 | struct inet6_dev *in6_dev; | |
1601 | ||
1602 | pinfo = (struct prefix_info *) opt; | |
1603 | ||
1604 | if (len < sizeof(struct prefix_info)) { | |
1605 | ADBG(("addrconf: prefix option too short\n")); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * Validation checks ([ADDRCONF], page 19) | |
1611 | */ | |
1612 | ||
1613 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1614 | ||
1615 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1616 | return; | |
1617 | ||
1618 | valid_lft = ntohl(pinfo->valid); | |
1619 | prefered_lft = ntohl(pinfo->prefered); | |
1620 | ||
1621 | if (prefered_lft > valid_lft) { | |
1622 | if (net_ratelimit()) | |
1623 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1624 | return; | |
1625 | } | |
1626 | ||
1627 | in6_dev = in6_dev_get(dev); | |
1628 | ||
1629 | if (in6_dev == NULL) { | |
1630 | if (net_ratelimit()) | |
1631 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1632 | return; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Two things going on here: | |
1637 | * 1) Add routes for on-link prefixes | |
1638 | * 2) Configure prefixes with the auto flag set | |
1639 | */ | |
1640 | ||
1641 | /* Avoid arithmetic overflow. Really, we could | |
1642 | save rt_expires in seconds, likely valid_lft, | |
1643 | but it would require division in fib gc, that it | |
1644 | not good. | |
1645 | */ | |
1646 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
1647 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); | |
1648 | else | |
1649 | rt_expires = valid_lft * HZ; | |
1650 | ||
1651 | /* | |
1652 | * We convert this (in jiffies) to clock_t later. | |
1653 | * Avoid arithmetic overflow there as well. | |
1654 | * Overflow can happen only if HZ < USER_HZ. | |
1655 | */ | |
1656 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1657 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1658 | ||
1659 | if (pinfo->onlink) { | |
1660 | struct rt6_info *rt; | |
1661 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1662 | ||
1663 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1664 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1665 | if (valid_lft == 0) { | |
1666 | ip6_del_rt(rt); | |
1667 | rt = NULL; | |
1668 | } else { | |
1669 | rt->rt6i_expires = jiffies + rt_expires; | |
1670 | } | |
1671 | } | |
1672 | } else if (valid_lft) { | |
1673 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
1674 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); | |
1675 | } | |
1676 | if (rt) | |
1677 | dst_release(&rt->u.dst); | |
1678 | } | |
1679 | ||
1680 | /* Try to figure out our local address for this prefix */ | |
1681 | ||
1682 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1683 | struct inet6_ifaddr * ifp; | |
1684 | struct in6_addr addr; | |
1685 | int create = 0, update_lft = 0; | |
1686 | ||
1687 | if (pinfo->prefix_len == 64) { | |
1688 | memcpy(&addr, &pinfo->prefix, 8); | |
1689 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1690 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1691 | in6_dev_put(in6_dev); | |
1692 | return; | |
1693 | } | |
1694 | goto ok; | |
1695 | } | |
1696 | if (net_ratelimit()) | |
1697 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1698 | pinfo->prefix_len); | |
1699 | in6_dev_put(in6_dev); | |
1700 | return; | |
1701 | ||
1702 | ok: | |
1703 | ||
1704 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1705 | ||
1706 | if (ifp == NULL && valid_lft) { | |
1707 | int max_addresses = in6_dev->cnf.max_addresses; | |
1708 | ||
1709 | /* Do not allow to create too much of autoconfigured | |
1710 | * addresses; this would be too easy way to crash kernel. | |
1711 | */ | |
1712 | if (!max_addresses || | |
1713 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1714 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1715 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1716 | ||
1717 | if (!ifp || IS_ERR(ifp)) { | |
1718 | in6_dev_put(in6_dev); | |
1719 | return; | |
1720 | } | |
1721 | ||
1722 | update_lft = create = 1; | |
1723 | ifp->cstamp = jiffies; | |
1724 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1725 | } | |
1726 | ||
1727 | if (ifp) { | |
1728 | int flags; | |
1729 | unsigned long now; | |
1730 | #ifdef CONFIG_IPV6_PRIVACY | |
1731 | struct inet6_ifaddr *ift; | |
1732 | #endif | |
1733 | u32 stored_lft; | |
1734 | ||
1735 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1736 | spin_lock(&ifp->lock); | |
1737 | now = jiffies; | |
1738 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1739 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1740 | else | |
1741 | stored_lft = 0; | |
1742 | if (!update_lft && stored_lft) { | |
1743 | if (valid_lft > MIN_VALID_LIFETIME || | |
1744 | valid_lft > stored_lft) | |
1745 | update_lft = 1; | |
1746 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1747 | /* valid_lft <= stored_lft is always true */ | |
1748 | /* XXX: IPsec */ | |
1749 | update_lft = 0; | |
1750 | } else { | |
1751 | valid_lft = MIN_VALID_LIFETIME; | |
1752 | if (valid_lft < prefered_lft) | |
1753 | prefered_lft = valid_lft; | |
1754 | update_lft = 1; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | if (update_lft) { | |
1759 | ifp->valid_lft = valid_lft; | |
1760 | ifp->prefered_lft = prefered_lft; | |
1761 | ifp->tstamp = now; | |
1762 | flags = ifp->flags; | |
1763 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1764 | spin_unlock(&ifp->lock); | |
1765 | ||
1766 | if (!(flags&IFA_F_TENTATIVE)) | |
1767 | ipv6_ifa_notify(0, ifp); | |
1768 | } else | |
1769 | spin_unlock(&ifp->lock); | |
1770 | ||
1771 | #ifdef CONFIG_IPV6_PRIVACY | |
1772 | read_lock_bh(&in6_dev->lock); | |
1773 | /* update all temporary addresses in the list */ | |
1774 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1775 | /* | |
1776 | * When adjusting the lifetimes of an existing | |
1777 | * temporary address, only lower the lifetimes. | |
1778 | * Implementations must not increase the | |
1779 | * lifetimes of an existing temporary address | |
1780 | * when processing a Prefix Information Option. | |
1781 | */ | |
1782 | spin_lock(&ift->lock); | |
1783 | flags = ift->flags; | |
1784 | if (ift->valid_lft > valid_lft && | |
1785 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1786 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1787 | if (ift->prefered_lft > prefered_lft && | |
1788 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1789 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1790 | spin_unlock(&ift->lock); | |
1791 | if (!(flags&IFA_F_TENTATIVE)) | |
1792 | ipv6_ifa_notify(0, ift); | |
1793 | } | |
1794 | ||
1795 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1796 | /* | |
1797 | * When a new public address is created as described in [ADDRCONF], | |
1798 | * also create a new temporary address. | |
1799 | */ | |
1800 | read_unlock_bh(&in6_dev->lock); | |
1801 | ipv6_create_tempaddr(ifp, NULL); | |
1802 | } else { | |
1803 | read_unlock_bh(&in6_dev->lock); | |
1804 | } | |
1805 | #endif | |
1806 | in6_ifa_put(ifp); | |
1807 | addrconf_verify(0); | |
1808 | } | |
1809 | } | |
1810 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1811 | in6_dev_put(in6_dev); | |
1812 | } | |
1813 | ||
1814 | /* | |
1815 | * Set destination address. | |
1816 | * Special case for SIT interfaces where we create a new "virtual" | |
1817 | * device. | |
1818 | */ | |
1819 | int addrconf_set_dstaddr(void __user *arg) | |
1820 | { | |
1821 | struct in6_ifreq ireq; | |
1822 | struct net_device *dev; | |
1823 | int err = -EINVAL; | |
1824 | ||
1825 | rtnl_lock(); | |
1826 | ||
1827 | err = -EFAULT; | |
1828 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1829 | goto err_exit; | |
1830 | ||
1831 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1832 | ||
1833 | err = -ENODEV; | |
1834 | if (dev == NULL) | |
1835 | goto err_exit; | |
1836 | ||
1837 | if (dev->type == ARPHRD_SIT) { | |
1838 | struct ifreq ifr; | |
1839 | mm_segment_t oldfs; | |
1840 | struct ip_tunnel_parm p; | |
1841 | ||
1842 | err = -EADDRNOTAVAIL; | |
1843 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1844 | goto err_exit; | |
1845 | ||
1846 | memset(&p, 0, sizeof(p)); | |
1847 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1848 | p.iph.saddr = 0; | |
1849 | p.iph.version = 4; | |
1850 | p.iph.ihl = 5; | |
1851 | p.iph.protocol = IPPROTO_IPV6; | |
1852 | p.iph.ttl = 64; | |
1853 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1854 | ||
1855 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1856 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1857 | set_fs(oldfs); | |
1858 | ||
1859 | if (err == 0) { | |
1860 | err = -ENOBUFS; | |
1861 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1862 | goto err_exit; | |
1863 | err = dev_open(dev); | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | err_exit: | |
1868 | rtnl_unlock(); | |
1869 | return err; | |
1870 | } | |
1871 | ||
1872 | /* | |
1873 | * Manual configuration of address on an interface | |
1874 | */ | |
1875 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, | |
1876 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) | |
1877 | { | |
1878 | struct inet6_ifaddr *ifp; | |
1879 | struct inet6_dev *idev; | |
1880 | struct net_device *dev; | |
1881 | int scope; | |
1882 | ||
1883 | ASSERT_RTNL(); | |
1884 | ||
1885 | /* check the lifetime */ | |
1886 | if (!valid_lft || prefered_lft > valid_lft) | |
1887 | return -EINVAL; | |
1888 | ||
1889 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1890 | return -ENODEV; | |
1891 | ||
1892 | if ((idev = addrconf_add_dev(dev)) == NULL) | |
1893 | return -ENOBUFS; | |
1894 | ||
1895 | scope = ipv6_addr_scope(pfx); | |
1896 | ||
1897 | if (valid_lft == INFINITY_LIFE_TIME) | |
1898 | ifa_flags |= IFA_F_PERMANENT; | |
1899 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
1900 | valid_lft = 0x7FFFFFFF/HZ; | |
1901 | ||
1902 | if (prefered_lft == 0) | |
1903 | ifa_flags |= IFA_F_DEPRECATED; | |
1904 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1905 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1906 | prefered_lft = 0x7FFFFFFF/HZ; | |
1907 | ||
1908 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1909 | ||
1910 | if (!IS_ERR(ifp)) { | |
1911 | spin_lock_bh(&ifp->lock); | |
1912 | ifp->valid_lft = valid_lft; | |
1913 | ifp->prefered_lft = prefered_lft; | |
1914 | ifp->tstamp = jiffies; | |
1915 | spin_unlock_bh(&ifp->lock); | |
1916 | ||
1917 | addrconf_dad_start(ifp, 0); | |
1918 | in6_ifa_put(ifp); | |
1919 | addrconf_verify(0); | |
1920 | return 0; | |
1921 | } | |
1922 | ||
1923 | return PTR_ERR(ifp); | |
1924 | } | |
1925 | ||
1926 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1927 | { | |
1928 | struct inet6_ifaddr *ifp; | |
1929 | struct inet6_dev *idev; | |
1930 | struct net_device *dev; | |
1931 | ||
1932 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1933 | return -ENODEV; | |
1934 | ||
1935 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1936 | return -ENXIO; | |
1937 | ||
1938 | read_lock_bh(&idev->lock); | |
1939 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1940 | if (ifp->prefix_len == plen && | |
1941 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1942 | in6_ifa_hold(ifp); | |
1943 | read_unlock_bh(&idev->lock); | |
1944 | ||
1945 | ipv6_del_addr(ifp); | |
1946 | ||
1947 | /* If the last address is deleted administratively, | |
1948 | disable IPv6 on this interface. | |
1949 | */ | |
1950 | if (idev->addr_list == NULL) | |
1951 | addrconf_ifdown(idev->dev, 1); | |
1952 | return 0; | |
1953 | } | |
1954 | } | |
1955 | read_unlock_bh(&idev->lock); | |
1956 | return -EADDRNOTAVAIL; | |
1957 | } | |
1958 | ||
1959 | ||
1960 | int addrconf_add_ifaddr(void __user *arg) | |
1961 | { | |
1962 | struct in6_ifreq ireq; | |
1963 | int err; | |
1964 | ||
1965 | if (!capable(CAP_NET_ADMIN)) | |
1966 | return -EPERM; | |
1967 | ||
1968 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1969 | return -EFAULT; | |
1970 | ||
1971 | rtnl_lock(); | |
1972 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, | |
1973 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1974 | rtnl_unlock(); | |
1975 | return err; | |
1976 | } | |
1977 | ||
1978 | int addrconf_del_ifaddr(void __user *arg) | |
1979 | { | |
1980 | struct in6_ifreq ireq; | |
1981 | int err; | |
1982 | ||
1983 | if (!capable(CAP_NET_ADMIN)) | |
1984 | return -EPERM; | |
1985 | ||
1986 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1987 | return -EFAULT; | |
1988 | ||
1989 | rtnl_lock(); | |
1990 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1991 | rtnl_unlock(); | |
1992 | return err; | |
1993 | } | |
1994 | ||
1995 | static void sit_add_v4_addrs(struct inet6_dev *idev) | |
1996 | { | |
1997 | struct inet6_ifaddr * ifp; | |
1998 | struct in6_addr addr; | |
1999 | struct net_device *dev; | |
2000 | int scope; | |
2001 | ||
2002 | ASSERT_RTNL(); | |
2003 | ||
2004 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2005 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2006 | ||
2007 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2008 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2009 | scope = IFA_LINK; | |
2010 | } else { | |
2011 | scope = IPV6_ADDR_COMPATv4; | |
2012 | } | |
2013 | ||
2014 | if (addr.s6_addr32[3]) { | |
2015 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2016 | if (!IS_ERR(ifp)) { | |
2017 | spin_lock_bh(&ifp->lock); | |
2018 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2019 | spin_unlock_bh(&ifp->lock); | |
2020 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2021 | in6_ifa_put(ifp); | |
2022 | } | |
2023 | return; | |
2024 | } | |
2025 | ||
2026 | for (dev = dev_base; dev != NULL; dev = dev->next) { | |
2027 | struct in_device * in_dev = __in_dev_get_rtnl(dev); | |
2028 | if (in_dev && (dev->flags & IFF_UP)) { | |
2029 | struct in_ifaddr * ifa; | |
2030 | ||
2031 | int flag = scope; | |
2032 | ||
2033 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2034 | int plen; | |
2035 | ||
2036 | addr.s6_addr32[3] = ifa->ifa_local; | |
2037 | ||
2038 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2039 | continue; | |
2040 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2041 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2042 | continue; | |
2043 | flag |= IFA_HOST; | |
2044 | } | |
2045 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2046 | plen = 64; | |
2047 | else | |
2048 | plen = 96; | |
2049 | ||
2050 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2051 | IFA_F_PERMANENT); | |
2052 | if (!IS_ERR(ifp)) { | |
2053 | spin_lock_bh(&ifp->lock); | |
2054 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2055 | spin_unlock_bh(&ifp->lock); | |
2056 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2057 | in6_ifa_put(ifp); | |
2058 | } | |
2059 | } | |
2060 | } | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | static void init_loopback(struct net_device *dev) | |
2065 | { | |
2066 | struct inet6_dev *idev; | |
2067 | struct inet6_ifaddr * ifp; | |
2068 | ||
2069 | /* ::1 */ | |
2070 | ||
2071 | ASSERT_RTNL(); | |
2072 | ||
2073 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2074 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2075 | return; | |
2076 | } | |
2077 | ||
2078 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2079 | if (!IS_ERR(ifp)) { | |
2080 | spin_lock_bh(&ifp->lock); | |
2081 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2082 | spin_unlock_bh(&ifp->lock); | |
2083 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2084 | in6_ifa_put(ifp); | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2089 | { | |
2090 | struct inet6_ifaddr * ifp; | |
2091 | ||
2092 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2093 | if (!IS_ERR(ifp)) { | |
2094 | addrconf_dad_start(ifp, 0); | |
2095 | in6_ifa_put(ifp); | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | static void addrconf_dev_config(struct net_device *dev) | |
2100 | { | |
2101 | struct in6_addr addr; | |
2102 | struct inet6_dev * idev; | |
2103 | ||
2104 | ASSERT_RTNL(); | |
2105 | ||
2106 | if ((dev->type != ARPHRD_ETHER) && | |
2107 | (dev->type != ARPHRD_FDDI) && | |
2108 | (dev->type != ARPHRD_IEEE802_TR) && | |
2109 | (dev->type != ARPHRD_ARCNET) && | |
2110 | (dev->type != ARPHRD_INFINIBAND)) { | |
2111 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2112 | return; | |
2113 | } | |
2114 | ||
2115 | idev = addrconf_add_dev(dev); | |
2116 | if (idev == NULL) | |
2117 | return; | |
2118 | ||
2119 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2120 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2121 | ||
2122 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2123 | addrconf_add_linklocal(idev, &addr); | |
2124 | } | |
2125 | ||
2126 | static void addrconf_sit_config(struct net_device *dev) | |
2127 | { | |
2128 | struct inet6_dev *idev; | |
2129 | ||
2130 | ASSERT_RTNL(); | |
2131 | ||
2132 | /* | |
2133 | * Configure the tunnel with one of our IPv4 | |
2134 | * addresses... we should configure all of | |
2135 | * our v4 addrs in the tunnel | |
2136 | */ | |
2137 | ||
2138 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2139 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2140 | return; | |
2141 | } | |
2142 | ||
2143 | sit_add_v4_addrs(idev); | |
2144 | ||
2145 | if (dev->flags&IFF_POINTOPOINT) { | |
2146 | addrconf_add_mroute(dev); | |
2147 | addrconf_add_lroute(dev); | |
2148 | } else | |
2149 | sit_route_add(dev); | |
2150 | } | |
2151 | ||
2152 | static inline int | |
2153 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2154 | { | |
2155 | struct in6_addr lladdr; | |
2156 | ||
2157 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2158 | addrconf_add_linklocal(idev, &lladdr); | |
2159 | return 0; | |
2160 | } | |
2161 | return -1; | |
2162 | } | |
2163 | ||
2164 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2165 | { | |
2166 | struct net_device *link_dev; | |
2167 | ||
2168 | /* first try to inherit the link-local address from the link device */ | |
2169 | if (idev->dev->iflink && | |
2170 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2171 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2172 | return; | |
2173 | } | |
2174 | /* then try to inherit it from any device */ | |
2175 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2176 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2177 | return; | |
2178 | } | |
2179 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2180 | } | |
2181 | ||
2182 | /* | |
2183 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2184 | * DHCPv6, MLD etc. can be run over the virtual link | |
2185 | */ | |
2186 | ||
2187 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2188 | { | |
2189 | struct inet6_dev *idev; | |
2190 | ||
2191 | ASSERT_RTNL(); | |
2192 | ||
2193 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2194 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2195 | return; | |
2196 | } | |
2197 | ip6_tnl_add_linklocal(idev); | |
2198 | } | |
2199 | ||
2200 | static int addrconf_notify(struct notifier_block *this, unsigned long event, | |
2201 | void * data) | |
2202 | { | |
2203 | struct net_device *dev = (struct net_device *) data; | |
2204 | struct inet6_dev *idev = __in6_dev_get(dev); | |
2205 | int run_pending = 0; | |
2206 | ||
2207 | switch(event) { | |
2208 | case NETDEV_UP: | |
2209 | case NETDEV_CHANGE: | |
2210 | if (event == NETDEV_UP) { | |
2211 | if (!netif_carrier_ok(dev)) { | |
2212 | /* device is not ready yet. */ | |
2213 | printk(KERN_INFO | |
2214 | "ADDRCONF(NETDEV_UP): %s: " | |
2215 | "link is not ready\n", | |
2216 | dev->name); | |
2217 | break; | |
2218 | } | |
2219 | ||
2220 | if (idev) | |
2221 | idev->if_flags |= IF_READY; | |
2222 | } else { | |
2223 | if (!netif_carrier_ok(dev)) { | |
2224 | /* device is still not ready. */ | |
2225 | break; | |
2226 | } | |
2227 | ||
2228 | if (idev) { | |
2229 | if (idev->if_flags & IF_READY) { | |
2230 | /* device is already configured. */ | |
2231 | break; | |
2232 | } | |
2233 | idev->if_flags |= IF_READY; | |
2234 | } | |
2235 | ||
2236 | printk(KERN_INFO | |
2237 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2238 | "link becomes ready\n", | |
2239 | dev->name); | |
2240 | ||
2241 | run_pending = 1; | |
2242 | } | |
2243 | ||
2244 | switch(dev->type) { | |
2245 | case ARPHRD_SIT: | |
2246 | addrconf_sit_config(dev); | |
2247 | break; | |
2248 | case ARPHRD_TUNNEL6: | |
2249 | addrconf_ip6_tnl_config(dev); | |
2250 | break; | |
2251 | case ARPHRD_LOOPBACK: | |
2252 | init_loopback(dev); | |
2253 | break; | |
2254 | ||
2255 | default: | |
2256 | addrconf_dev_config(dev); | |
2257 | break; | |
2258 | }; | |
2259 | if (idev) { | |
2260 | if (run_pending) | |
2261 | addrconf_dad_run(idev); | |
2262 | ||
2263 | /* If the MTU changed during the interface down, when the | |
2264 | interface up, the changed MTU must be reflected in the | |
2265 | idev as well as routers. | |
2266 | */ | |
2267 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2268 | rt6_mtu_change(dev, dev->mtu); | |
2269 | idev->cnf.mtu6 = dev->mtu; | |
2270 | } | |
2271 | idev->tstamp = jiffies; | |
2272 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2273 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2274 | stop IPv6 on this interface. | |
2275 | */ | |
2276 | if (dev->mtu < IPV6_MIN_MTU) | |
2277 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2278 | } | |
2279 | break; | |
2280 | ||
2281 | case NETDEV_CHANGEMTU: | |
2282 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2283 | rt6_mtu_change(dev, dev->mtu); | |
2284 | idev->cnf.mtu6 = dev->mtu; | |
2285 | break; | |
2286 | } | |
2287 | ||
2288 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2289 | ||
2290 | case NETDEV_DOWN: | |
2291 | case NETDEV_UNREGISTER: | |
2292 | /* | |
2293 | * Remove all addresses from this interface. | |
2294 | */ | |
2295 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2296 | break; | |
2297 | ||
2298 | case NETDEV_CHANGENAME: | |
2299 | #ifdef CONFIG_SYSCTL | |
2300 | if (idev) { | |
2301 | addrconf_sysctl_unregister(&idev->cnf); | |
2302 | neigh_sysctl_unregister(idev->nd_parms); | |
2303 | neigh_sysctl_register(dev, idev->nd_parms, | |
2304 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2305 | &ndisc_ifinfo_sysctl_change, | |
2306 | NULL); | |
2307 | addrconf_sysctl_register(idev, &idev->cnf); | |
2308 | } | |
2309 | #endif | |
2310 | break; | |
2311 | }; | |
2312 | ||
2313 | return NOTIFY_OK; | |
2314 | } | |
2315 | ||
2316 | /* | |
2317 | * addrconf module should be notified of a device going up | |
2318 | */ | |
2319 | static struct notifier_block ipv6_dev_notf = { | |
2320 | .notifier_call = addrconf_notify, | |
2321 | .priority = 0 | |
2322 | }; | |
2323 | ||
2324 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2325 | { | |
2326 | struct inet6_dev *idev; | |
2327 | struct inet6_ifaddr *ifa, **bifa; | |
2328 | int i; | |
2329 | ||
2330 | ASSERT_RTNL(); | |
2331 | ||
2332 | if (dev == &loopback_dev && how == 1) | |
2333 | how = 0; | |
2334 | ||
2335 | rt6_ifdown(dev); | |
2336 | neigh_ifdown(&nd_tbl, dev); | |
2337 | ||
2338 | idev = __in6_dev_get(dev); | |
2339 | if (idev == NULL) | |
2340 | return -ENODEV; | |
2341 | ||
2342 | /* Step 1: remove reference to ipv6 device from parent device. | |
2343 | Do not dev_put! | |
2344 | */ | |
2345 | if (how == 1) { | |
2346 | idev->dead = 1; | |
2347 | ||
2348 | /* protected by rtnl_lock */ | |
2349 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
2350 | ||
2351 | /* Step 1.5: remove snmp6 entry */ | |
2352 | snmp6_unregister_dev(idev); | |
2353 | ||
2354 | } | |
2355 | ||
2356 | /* Step 2: clear hash table */ | |
2357 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2358 | bifa = &inet6_addr_lst[i]; | |
2359 | ||
2360 | write_lock_bh(&addrconf_hash_lock); | |
2361 | while ((ifa = *bifa) != NULL) { | |
2362 | if (ifa->idev == idev) { | |
2363 | *bifa = ifa->lst_next; | |
2364 | ifa->lst_next = NULL; | |
2365 | addrconf_del_timer(ifa); | |
2366 | in6_ifa_put(ifa); | |
2367 | continue; | |
2368 | } | |
2369 | bifa = &ifa->lst_next; | |
2370 | } | |
2371 | write_unlock_bh(&addrconf_hash_lock); | |
2372 | } | |
2373 | ||
2374 | write_lock_bh(&idev->lock); | |
2375 | ||
2376 | /* Step 3: clear flags for stateless addrconf */ | |
2377 | if (how != 1) | |
2378 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); | |
2379 | ||
2380 | /* Step 4: clear address list */ | |
2381 | #ifdef CONFIG_IPV6_PRIVACY | |
2382 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2383 | in6_dev_put(idev); | |
2384 | ||
2385 | /* clear tempaddr list */ | |
2386 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2387 | idev->tempaddr_list = ifa->tmp_next; | |
2388 | ifa->tmp_next = NULL; | |
2389 | ifa->dead = 1; | |
2390 | write_unlock_bh(&idev->lock); | |
2391 | spin_lock_bh(&ifa->lock); | |
2392 | ||
2393 | if (ifa->ifpub) { | |
2394 | in6_ifa_put(ifa->ifpub); | |
2395 | ifa->ifpub = NULL; | |
2396 | } | |
2397 | spin_unlock_bh(&ifa->lock); | |
2398 | in6_ifa_put(ifa); | |
2399 | write_lock_bh(&idev->lock); | |
2400 | } | |
2401 | #endif | |
2402 | while ((ifa = idev->addr_list) != NULL) { | |
2403 | idev->addr_list = ifa->if_next; | |
2404 | ifa->if_next = NULL; | |
2405 | ifa->dead = 1; | |
2406 | addrconf_del_timer(ifa); | |
2407 | write_unlock_bh(&idev->lock); | |
2408 | ||
2409 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2410 | in6_ifa_put(ifa); | |
2411 | ||
2412 | write_lock_bh(&idev->lock); | |
2413 | } | |
2414 | write_unlock_bh(&idev->lock); | |
2415 | ||
2416 | /* Step 5: Discard multicast list */ | |
2417 | ||
2418 | if (how == 1) | |
2419 | ipv6_mc_destroy_dev(idev); | |
2420 | else | |
2421 | ipv6_mc_down(idev); | |
2422 | ||
2423 | /* Step 5: netlink notification of this interface */ | |
2424 | idev->tstamp = jiffies; | |
2425 | inet6_ifinfo_notify(RTM_DELLINK, idev); | |
2426 | ||
2427 | /* Shot the device (if unregistered) */ | |
2428 | ||
2429 | if (how == 1) { | |
2430 | #ifdef CONFIG_SYSCTL | |
2431 | addrconf_sysctl_unregister(&idev->cnf); | |
2432 | neigh_sysctl_unregister(idev->nd_parms); | |
2433 | #endif | |
2434 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2435 | neigh_ifdown(&nd_tbl, dev); | |
2436 | in6_dev_put(idev); | |
2437 | } | |
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static void addrconf_rs_timer(unsigned long data) | |
2442 | { | |
2443 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2444 | ||
2445 | if (ifp->idev->cnf.forwarding) | |
2446 | goto out; | |
2447 | ||
2448 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2449 | /* | |
2450 | * Announcement received after solicitation | |
2451 | * was sent | |
2452 | */ | |
2453 | goto out; | |
2454 | } | |
2455 | ||
2456 | spin_lock(&ifp->lock); | |
2457 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2458 | struct in6_addr all_routers; | |
2459 | ||
2460 | /* The wait after the last probe can be shorter */ | |
2461 | addrconf_mod_timer(ifp, AC_RS, | |
2462 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2463 | ifp->idev->cnf.rtr_solicit_delay : | |
2464 | ifp->idev->cnf.rtr_solicit_interval); | |
2465 | spin_unlock(&ifp->lock); | |
2466 | ||
2467 | ipv6_addr_all_routers(&all_routers); | |
2468 | ||
2469 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2470 | } else { | |
2471 | spin_unlock(&ifp->lock); | |
2472 | /* | |
2473 | * Note: we do not support deprecated "all on-link" | |
2474 | * assumption any longer. | |
2475 | */ | |
2476 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2477 | ifp->idev->dev->name); | |
2478 | } | |
2479 | ||
2480 | out: | |
2481 | in6_ifa_put(ifp); | |
2482 | } | |
2483 | ||
2484 | /* | |
2485 | * Duplicate Address Detection | |
2486 | */ | |
2487 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) | |
2488 | { | |
2489 | unsigned long rand_num; | |
2490 | struct inet6_dev *idev = ifp->idev; | |
2491 | ||
2492 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2493 | ifp->probes = idev->cnf.dad_transmits; | |
2494 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2495 | } | |
2496 | ||
2497 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) | |
2498 | { | |
2499 | struct inet6_dev *idev = ifp->idev; | |
2500 | struct net_device *dev = idev->dev; | |
2501 | ||
2502 | addrconf_join_solict(dev, &ifp->addr); | |
2503 | ||
2504 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2505 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2506 | flags); | |
2507 | ||
2508 | net_srandom(ifp->addr.s6_addr32[3]); | |
2509 | ||
2510 | read_lock_bh(&idev->lock); | |
2511 | if (ifp->dead) | |
2512 | goto out; | |
2513 | spin_lock_bh(&ifp->lock); | |
2514 | ||
2515 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
2516 | !(ifp->flags&IFA_F_TENTATIVE) || | |
2517 | ifp->flags & IFA_F_NODAD) { | |
2518 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2519 | spin_unlock_bh(&ifp->lock); | |
2520 | read_unlock_bh(&idev->lock); | |
2521 | ||
2522 | addrconf_dad_completed(ifp); | |
2523 | return; | |
2524 | } | |
2525 | ||
2526 | if (!(idev->if_flags & IF_READY)) { | |
2527 | spin_unlock_bh(&ifp->lock); | |
2528 | read_unlock_bh(&idev->lock); | |
2529 | /* | |
2530 | * If the defice is not ready: | |
2531 | * - keep it tentative if it is a permanent address. | |
2532 | * - otherwise, kill it. | |
2533 | */ | |
2534 | in6_ifa_hold(ifp); | |
2535 | addrconf_dad_stop(ifp); | |
2536 | return; | |
2537 | } | |
2538 | addrconf_dad_kick(ifp); | |
2539 | spin_unlock_bh(&ifp->lock); | |
2540 | out: | |
2541 | read_unlock_bh(&idev->lock); | |
2542 | } | |
2543 | ||
2544 | static void addrconf_dad_timer(unsigned long data) | |
2545 | { | |
2546 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2547 | struct inet6_dev *idev = ifp->idev; | |
2548 | struct in6_addr unspec; | |
2549 | struct in6_addr mcaddr; | |
2550 | ||
2551 | read_lock_bh(&idev->lock); | |
2552 | if (idev->dead) { | |
2553 | read_unlock_bh(&idev->lock); | |
2554 | goto out; | |
2555 | } | |
2556 | spin_lock_bh(&ifp->lock); | |
2557 | if (ifp->probes == 0) { | |
2558 | /* | |
2559 | * DAD was successful | |
2560 | */ | |
2561 | ||
2562 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2563 | spin_unlock_bh(&ifp->lock); | |
2564 | read_unlock_bh(&idev->lock); | |
2565 | ||
2566 | addrconf_dad_completed(ifp); | |
2567 | ||
2568 | goto out; | |
2569 | } | |
2570 | ||
2571 | ifp->probes--; | |
2572 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2573 | spin_unlock_bh(&ifp->lock); | |
2574 | read_unlock_bh(&idev->lock); | |
2575 | ||
2576 | /* send a neighbour solicitation for our addr */ | |
2577 | memset(&unspec, 0, sizeof(unspec)); | |
2578 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2579 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2580 | out: | |
2581 | in6_ifa_put(ifp); | |
2582 | } | |
2583 | ||
2584 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2585 | { | |
2586 | struct net_device * dev = ifp->idev->dev; | |
2587 | ||
2588 | /* | |
2589 | * Configure the address for reception. Now it is valid. | |
2590 | */ | |
2591 | ||
2592 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2593 | ||
2594 | /* If added prefix is link local and forwarding is off, | |
2595 | start sending router solicitations. | |
2596 | */ | |
2597 | ||
2598 | if (ifp->idev->cnf.forwarding == 0 && | |
2599 | ifp->idev->cnf.rtr_solicits > 0 && | |
2600 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2601 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2602 | struct in6_addr all_routers; | |
2603 | ||
2604 | ipv6_addr_all_routers(&all_routers); | |
2605 | ||
2606 | /* | |
2607 | * If a host as already performed a random delay | |
2608 | * [...] as part of DAD [...] there is no need | |
2609 | * to delay again before sending the first RS | |
2610 | */ | |
2611 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2612 | ||
2613 | spin_lock_bh(&ifp->lock); | |
2614 | ifp->probes = 1; | |
2615 | ifp->idev->if_flags |= IF_RS_SENT; | |
2616 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2617 | spin_unlock_bh(&ifp->lock); | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | static void addrconf_dad_run(struct inet6_dev *idev) { | |
2622 | struct inet6_ifaddr *ifp; | |
2623 | ||
2624 | read_lock_bh(&idev->lock); | |
2625 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2626 | spin_lock_bh(&ifp->lock); | |
2627 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2628 | spin_unlock_bh(&ifp->lock); | |
2629 | continue; | |
2630 | } | |
2631 | spin_unlock_bh(&ifp->lock); | |
2632 | addrconf_dad_kick(ifp); | |
2633 | } | |
2634 | read_unlock_bh(&idev->lock); | |
2635 | } | |
2636 | ||
2637 | #ifdef CONFIG_PROC_FS | |
2638 | struct if6_iter_state { | |
2639 | int bucket; | |
2640 | }; | |
2641 | ||
2642 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2643 | { | |
2644 | struct inet6_ifaddr *ifa = NULL; | |
2645 | struct if6_iter_state *state = seq->private; | |
2646 | ||
2647 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2648 | ifa = inet6_addr_lst[state->bucket]; | |
2649 | if (ifa) | |
2650 | break; | |
2651 | } | |
2652 | return ifa; | |
2653 | } | |
2654 | ||
2655 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2656 | { | |
2657 | struct if6_iter_state *state = seq->private; | |
2658 | ||
2659 | ifa = ifa->lst_next; | |
2660 | try_again: | |
2661 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2662 | ifa = inet6_addr_lst[state->bucket]; | |
2663 | goto try_again; | |
2664 | } | |
2665 | return ifa; | |
2666 | } | |
2667 | ||
2668 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2669 | { | |
2670 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2671 | ||
2672 | if (ifa) | |
2673 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2674 | --pos; | |
2675 | return pos ? NULL : ifa; | |
2676 | } | |
2677 | ||
2678 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2679 | { | |
2680 | read_lock_bh(&addrconf_hash_lock); | |
2681 | return if6_get_idx(seq, *pos); | |
2682 | } | |
2683 | ||
2684 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2685 | { | |
2686 | struct inet6_ifaddr *ifa; | |
2687 | ||
2688 | ifa = if6_get_next(seq, v); | |
2689 | ++*pos; | |
2690 | return ifa; | |
2691 | } | |
2692 | ||
2693 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2694 | { | |
2695 | read_unlock_bh(&addrconf_hash_lock); | |
2696 | } | |
2697 | ||
2698 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2699 | { | |
2700 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2701 | seq_printf(seq, | |
2702 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", | |
2703 | NIP6(ifp->addr), | |
2704 | ifp->idev->dev->ifindex, | |
2705 | ifp->prefix_len, | |
2706 | ifp->scope, | |
2707 | ifp->flags, | |
2708 | ifp->idev->dev->name); | |
2709 | return 0; | |
2710 | } | |
2711 | ||
2712 | static struct seq_operations if6_seq_ops = { | |
2713 | .start = if6_seq_start, | |
2714 | .next = if6_seq_next, | |
2715 | .show = if6_seq_show, | |
2716 | .stop = if6_seq_stop, | |
2717 | }; | |
2718 | ||
2719 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2720 | { | |
2721 | struct seq_file *seq; | |
2722 | int rc = -ENOMEM; | |
2723 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); | |
2724 | ||
2725 | if (!s) | |
2726 | goto out; | |
2727 | ||
2728 | rc = seq_open(file, &if6_seq_ops); | |
2729 | if (rc) | |
2730 | goto out_kfree; | |
2731 | ||
2732 | seq = file->private_data; | |
2733 | seq->private = s; | |
2734 | out: | |
2735 | return rc; | |
2736 | out_kfree: | |
2737 | kfree(s); | |
2738 | goto out; | |
2739 | } | |
2740 | ||
2741 | static struct file_operations if6_fops = { | |
2742 | .owner = THIS_MODULE, | |
2743 | .open = if6_seq_open, | |
2744 | .read = seq_read, | |
2745 | .llseek = seq_lseek, | |
2746 | .release = seq_release_private, | |
2747 | }; | |
2748 | ||
2749 | int __init if6_proc_init(void) | |
2750 | { | |
2751 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2752 | return -ENOMEM; | |
2753 | return 0; | |
2754 | } | |
2755 | ||
2756 | void if6_proc_exit(void) | |
2757 | { | |
2758 | proc_net_remove("if_inet6"); | |
2759 | } | |
2760 | #endif /* CONFIG_PROC_FS */ | |
2761 | ||
2762 | /* | |
2763 | * Periodic address status verification | |
2764 | */ | |
2765 | ||
2766 | static void addrconf_verify(unsigned long foo) | |
2767 | { | |
2768 | struct inet6_ifaddr *ifp; | |
2769 | unsigned long now, next; | |
2770 | int i; | |
2771 | ||
2772 | spin_lock_bh(&addrconf_verify_lock); | |
2773 | now = jiffies; | |
2774 | next = now + ADDR_CHECK_FREQUENCY; | |
2775 | ||
2776 | del_timer(&addr_chk_timer); | |
2777 | ||
2778 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2779 | ||
2780 | restart: | |
2781 | read_lock(&addrconf_hash_lock); | |
2782 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { | |
2783 | unsigned long age; | |
2784 | #ifdef CONFIG_IPV6_PRIVACY | |
2785 | unsigned long regen_advance; | |
2786 | #endif | |
2787 | ||
2788 | if (ifp->flags & IFA_F_PERMANENT) | |
2789 | continue; | |
2790 | ||
2791 | spin_lock(&ifp->lock); | |
2792 | age = (now - ifp->tstamp) / HZ; | |
2793 | ||
2794 | #ifdef CONFIG_IPV6_PRIVACY | |
2795 | regen_advance = ifp->idev->cnf.regen_max_retry * | |
2796 | ifp->idev->cnf.dad_transmits * | |
2797 | ifp->idev->nd_parms->retrans_time / HZ; | |
2798 | #endif | |
2799 | ||
2800 | if (ifp->valid_lft != INFINITY_LIFE_TIME && | |
2801 | age >= ifp->valid_lft) { | |
2802 | spin_unlock(&ifp->lock); | |
2803 | in6_ifa_hold(ifp); | |
2804 | read_unlock(&addrconf_hash_lock); | |
2805 | ipv6_del_addr(ifp); | |
2806 | goto restart; | |
2807 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { | |
2808 | spin_unlock(&ifp->lock); | |
2809 | continue; | |
2810 | } else if (age >= ifp->prefered_lft) { | |
2811 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2812 | int deprecate = 0; | |
2813 | ||
2814 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2815 | deprecate = 1; | |
2816 | ifp->flags |= IFA_F_DEPRECATED; | |
2817 | } | |
2818 | ||
2819 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2820 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2821 | ||
2822 | spin_unlock(&ifp->lock); | |
2823 | ||
2824 | if (deprecate) { | |
2825 | in6_ifa_hold(ifp); | |
2826 | read_unlock(&addrconf_hash_lock); | |
2827 | ||
2828 | ipv6_ifa_notify(0, ifp); | |
2829 | in6_ifa_put(ifp); | |
2830 | goto restart; | |
2831 | } | |
2832 | #ifdef CONFIG_IPV6_PRIVACY | |
2833 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2834 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2835 | if (age >= ifp->prefered_lft - regen_advance) { | |
2836 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2837 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2838 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2839 | if (!ifp->regen_count && ifpub) { | |
2840 | ifp->regen_count++; | |
2841 | in6_ifa_hold(ifp); | |
2842 | in6_ifa_hold(ifpub); | |
2843 | spin_unlock(&ifp->lock); | |
2844 | read_unlock(&addrconf_hash_lock); | |
2845 | spin_lock(&ifpub->lock); | |
2846 | ifpub->regen_count = 0; | |
2847 | spin_unlock(&ifpub->lock); | |
2848 | ipv6_create_tempaddr(ifpub, ifp); | |
2849 | in6_ifa_put(ifpub); | |
2850 | in6_ifa_put(ifp); | |
2851 | goto restart; | |
2852 | } | |
2853 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2854 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2855 | spin_unlock(&ifp->lock); | |
2856 | #endif | |
2857 | } else { | |
2858 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2859 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2860 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2861 | spin_unlock(&ifp->lock); | |
2862 | } | |
2863 | } | |
2864 | read_unlock(&addrconf_hash_lock); | |
2865 | } | |
2866 | ||
2867 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2868 | add_timer(&addr_chk_timer); | |
2869 | spin_unlock_bh(&addrconf_verify_lock); | |
2870 | } | |
2871 | ||
2872 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) | |
2873 | { | |
2874 | struct in6_addr *pfx = NULL; | |
2875 | ||
2876 | if (addr) | |
2877 | pfx = nla_data(addr); | |
2878 | ||
2879 | if (local) { | |
2880 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2881 | pfx = NULL; | |
2882 | else | |
2883 | pfx = nla_data(local); | |
2884 | } | |
2885 | ||
2886 | return pfx; | |
2887 | } | |
2888 | ||
2889 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2890 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2891 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2892 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2893 | }; | |
2894 | ||
2895 | static int | |
2896 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2897 | { | |
2898 | struct ifaddrmsg *ifm; | |
2899 | struct nlattr *tb[IFA_MAX+1]; | |
2900 | struct in6_addr *pfx; | |
2901 | int err; | |
2902 | ||
2903 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); | |
2904 | if (err < 0) | |
2905 | return err; | |
2906 | ||
2907 | ifm = nlmsg_data(nlh); | |
2908 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
2909 | if (pfx == NULL) | |
2910 | return -EINVAL; | |
2911 | ||
2912 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2913 | } | |
2914 | ||
2915 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, | |
2916 | u32 prefered_lft, u32 valid_lft) | |
2917 | { | |
2918 | if (!valid_lft || (prefered_lft > valid_lft)) | |
2919 | return -EINVAL; | |
2920 | ||
2921 | if (valid_lft == INFINITY_LIFE_TIME) | |
2922 | ifa_flags |= IFA_F_PERMANENT; | |
2923 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
2924 | valid_lft = 0x7FFFFFFF/HZ; | |
2925 | ||
2926 | if (prefered_lft == 0) | |
2927 | ifa_flags |= IFA_F_DEPRECATED; | |
2928 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
2929 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2930 | prefered_lft = 0x7FFFFFFF/HZ; | |
2931 | ||
2932 | spin_lock_bh(&ifp->lock); | |
2933 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD)) | ifa_flags; | |
2934 | ifp->tstamp = jiffies; | |
2935 | ifp->valid_lft = valid_lft; | |
2936 | ifp->prefered_lft = prefered_lft; | |
2937 | ||
2938 | spin_unlock_bh(&ifp->lock); | |
2939 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2940 | ipv6_ifa_notify(0, ifp); | |
2941 | ||
2942 | addrconf_verify(0); | |
2943 | ||
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | static int | |
2948 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2949 | { | |
2950 | struct ifaddrmsg *ifm; | |
2951 | struct nlattr *tb[IFA_MAX+1]; | |
2952 | struct in6_addr *pfx; | |
2953 | struct inet6_ifaddr *ifa; | |
2954 | struct net_device *dev; | |
2955 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; | |
2956 | u8 ifa_flags; | |
2957 | int err; | |
2958 | ||
2959 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); | |
2960 | if (err < 0) | |
2961 | return err; | |
2962 | ||
2963 | ifm = nlmsg_data(nlh); | |
2964 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
2965 | if (pfx == NULL) | |
2966 | return -EINVAL; | |
2967 | ||
2968 | if (tb[IFA_CACHEINFO]) { | |
2969 | struct ifa_cacheinfo *ci; | |
2970 | ||
2971 | ci = nla_data(tb[IFA_CACHEINFO]); | |
2972 | valid_lft = ci->ifa_valid; | |
2973 | preferred_lft = ci->ifa_prefered; | |
2974 | } else { | |
2975 | preferred_lft = INFINITY_LIFE_TIME; | |
2976 | valid_lft = INFINITY_LIFE_TIME; | |
2977 | } | |
2978 | ||
2979 | dev = __dev_get_by_index(ifm->ifa_index); | |
2980 | if (dev == NULL) | |
2981 | return -ENODEV; | |
2982 | ||
2983 | /* We ignore other flags so far. */ | |
2984 | ifa_flags = ifm->ifa_flags & IFA_F_NODAD; | |
2985 | ||
2986 | ifa = ipv6_get_ifaddr(pfx, dev, 1); | |
2987 | if (ifa == NULL) { | |
2988 | /* | |
2989 | * It would be best to check for !NLM_F_CREATE here but | |
2990 | * userspace alreay relies on not having to provide this. | |
2991 | */ | |
2992 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
2993 | ifa_flags, preferred_lft, valid_lft); | |
2994 | } | |
2995 | ||
2996 | if (nlh->nlmsg_flags & NLM_F_EXCL || | |
2997 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
2998 | err = -EEXIST; | |
2999 | else | |
3000 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); | |
3001 | ||
3002 | in6_ifa_put(ifa); | |
3003 | ||
3004 | return err; | |
3005 | } | |
3006 | ||
3007 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, | |
3008 | u8 scope, int ifindex) | |
3009 | { | |
3010 | struct ifaddrmsg *ifm; | |
3011 | ||
3012 | ifm = nlmsg_data(nlh); | |
3013 | ifm->ifa_family = AF_INET6; | |
3014 | ifm->ifa_prefixlen = prefixlen; | |
3015 | ifm->ifa_flags = flags; | |
3016 | ifm->ifa_scope = scope; | |
3017 | ifm->ifa_index = ifindex; | |
3018 | } | |
3019 | ||
3020 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, | |
3021 | unsigned long tstamp, u32 preferred, u32 valid) | |
3022 | { | |
3023 | struct ifa_cacheinfo ci; | |
3024 | ||
3025 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3026 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3027 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3028 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3029 | ci.ifa_prefered = preferred; | |
3030 | ci.ifa_valid = valid; | |
3031 | ||
3032 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3033 | } | |
3034 | ||
3035 | static inline int rt_scope(int ifa_scope) | |
3036 | { | |
3037 | if (ifa_scope & IFA_HOST) | |
3038 | return RT_SCOPE_HOST; | |
3039 | else if (ifa_scope & IFA_LINK) | |
3040 | return RT_SCOPE_LINK; | |
3041 | else if (ifa_scope & IFA_SITE) | |
3042 | return RT_SCOPE_SITE; | |
3043 | else | |
3044 | return RT_SCOPE_UNIVERSE; | |
3045 | } | |
3046 | ||
3047 | static inline int inet6_ifaddr_msgsize(void) | |
3048 | { | |
3049 | return nlmsg_total_size(sizeof(struct ifaddrmsg) + | |
3050 | nla_total_size(16) + | |
3051 | nla_total_size(sizeof(struct ifa_cacheinfo)) + | |
3052 | 128); | |
3053 | } | |
3054 | ||
3055 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, | |
3056 | u32 pid, u32 seq, int event, unsigned int flags) | |
3057 | { | |
3058 | struct nlmsghdr *nlh; | |
3059 | u32 preferred, valid; | |
3060 | ||
3061 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); | |
3062 | if (nlh == NULL) | |
3063 | return -ENOBUFS; | |
3064 | ||
3065 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), | |
3066 | ifa->idev->dev->ifindex); | |
3067 | ||
3068 | if (!(ifa->flags&IFA_F_PERMANENT)) { | |
3069 | preferred = ifa->prefered_lft; | |
3070 | valid = ifa->valid_lft; | |
3071 | if (preferred != INFINITY_LIFE_TIME) { | |
3072 | long tval = (jiffies - ifa->tstamp)/HZ; | |
3073 | preferred -= tval; | |
3074 | if (valid != INFINITY_LIFE_TIME) | |
3075 | valid -= tval; | |
3076 | } | |
3077 | } else { | |
3078 | preferred = INFINITY_LIFE_TIME; | |
3079 | valid = INFINITY_LIFE_TIME; | |
3080 | } | |
3081 | ||
3082 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || | |
3083 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
3084 | return nlmsg_cancel(skb, nlh); | |
3085 | ||
3086 | return nlmsg_end(skb, nlh); | |
3087 | } | |
3088 | ||
3089 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
3090 | u32 pid, u32 seq, int event, u16 flags) | |
3091 | { | |
3092 | struct nlmsghdr *nlh; | |
3093 | u8 scope = RT_SCOPE_UNIVERSE; | |
3094 | int ifindex = ifmca->idev->dev->ifindex; | |
3095 | ||
3096 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3097 | scope = RT_SCOPE_SITE; | |
3098 | ||
3099 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); | |
3100 | if (nlh == NULL) | |
3101 | return -ENOBUFS; | |
3102 | ||
3103 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); | |
3104 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3105 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
3106 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) | |
3107 | return nlmsg_cancel(skb, nlh); | |
3108 | ||
3109 | return nlmsg_end(skb, nlh); | |
3110 | } | |
3111 | ||
3112 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
3113 | u32 pid, u32 seq, int event, unsigned int flags) | |
3114 | { | |
3115 | struct nlmsghdr *nlh; | |
3116 | u8 scope = RT_SCOPE_UNIVERSE; | |
3117 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3118 | ||
3119 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3120 | scope = RT_SCOPE_SITE; | |
3121 | ||
3122 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); | |
3123 | if (nlh == NULL) | |
3124 | return -ENOBUFS; | |
3125 | ||
3126 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); | |
3127 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3128 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
3129 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) | |
3130 | return nlmsg_cancel(skb, nlh); | |
3131 | ||
3132 | return nlmsg_end(skb, nlh); | |
3133 | } | |
3134 | ||
3135 | enum addr_type_t | |
3136 | { | |
3137 | UNICAST_ADDR, | |
3138 | MULTICAST_ADDR, | |
3139 | ANYCAST_ADDR, | |
3140 | }; | |
3141 | ||
3142 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3143 | enum addr_type_t type) | |
3144 | { | |
3145 | int idx, ip_idx; | |
3146 | int s_idx, s_ip_idx; | |
3147 | int err = 1; | |
3148 | struct net_device *dev; | |
3149 | struct inet6_dev *idev = NULL; | |
3150 | struct inet6_ifaddr *ifa; | |
3151 | struct ifmcaddr6 *ifmca; | |
3152 | struct ifacaddr6 *ifaca; | |
3153 | ||
3154 | s_idx = cb->args[0]; | |
3155 | s_ip_idx = ip_idx = cb->args[1]; | |
3156 | read_lock(&dev_base_lock); | |
3157 | ||
3158 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
3159 | if (idx < s_idx) | |
3160 | continue; | |
3161 | if (idx > s_idx) | |
3162 | s_ip_idx = 0; | |
3163 | ip_idx = 0; | |
3164 | if ((idev = in6_dev_get(dev)) == NULL) | |
3165 | continue; | |
3166 | read_lock_bh(&idev->lock); | |
3167 | switch (type) { | |
3168 | case UNICAST_ADDR: | |
3169 | /* unicast address incl. temp addr */ | |
3170 | for (ifa = idev->addr_list; ifa; | |
3171 | ifa = ifa->if_next, ip_idx++) { | |
3172 | if (ip_idx < s_ip_idx) | |
3173 | continue; | |
3174 | if ((err = inet6_fill_ifaddr(skb, ifa, | |
3175 | NETLINK_CB(cb->skb).pid, | |
3176 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
3177 | NLM_F_MULTI)) <= 0) | |
3178 | goto done; | |
3179 | } | |
3180 | break; | |
3181 | case MULTICAST_ADDR: | |
3182 | /* multicast address */ | |
3183 | for (ifmca = idev->mc_list; ifmca; | |
3184 | ifmca = ifmca->next, ip_idx++) { | |
3185 | if (ip_idx < s_ip_idx) | |
3186 | continue; | |
3187 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, | |
3188 | NETLINK_CB(cb->skb).pid, | |
3189 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, | |
3190 | NLM_F_MULTI)) <= 0) | |
3191 | goto done; | |
3192 | } | |
3193 | break; | |
3194 | case ANYCAST_ADDR: | |
3195 | /* anycast address */ | |
3196 | for (ifaca = idev->ac_list; ifaca; | |
3197 | ifaca = ifaca->aca_next, ip_idx++) { | |
3198 | if (ip_idx < s_ip_idx) | |
3199 | continue; | |
3200 | if ((err = inet6_fill_ifacaddr(skb, ifaca, | |
3201 | NETLINK_CB(cb->skb).pid, | |
3202 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, | |
3203 | NLM_F_MULTI)) <= 0) | |
3204 | goto done; | |
3205 | } | |
3206 | break; | |
3207 | default: | |
3208 | break; | |
3209 | } | |
3210 | read_unlock_bh(&idev->lock); | |
3211 | in6_dev_put(idev); | |
3212 | } | |
3213 | done: | |
3214 | if (err <= 0) { | |
3215 | read_unlock_bh(&idev->lock); | |
3216 | in6_dev_put(idev); | |
3217 | } | |
3218 | read_unlock(&dev_base_lock); | |
3219 | cb->args[0] = idx; | |
3220 | cb->args[1] = ip_idx; | |
3221 | return skb->len; | |
3222 | } | |
3223 | ||
3224 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3225 | { | |
3226 | enum addr_type_t type = UNICAST_ADDR; | |
3227 | return inet6_dump_addr(skb, cb, type); | |
3228 | } | |
3229 | ||
3230 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3231 | { | |
3232 | enum addr_type_t type = MULTICAST_ADDR; | |
3233 | return inet6_dump_addr(skb, cb, type); | |
3234 | } | |
3235 | ||
3236 | ||
3237 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3238 | { | |
3239 | enum addr_type_t type = ANYCAST_ADDR; | |
3240 | return inet6_dump_addr(skb, cb, type); | |
3241 | } | |
3242 | ||
3243 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, | |
3244 | void *arg) | |
3245 | { | |
3246 | struct ifaddrmsg *ifm; | |
3247 | struct nlattr *tb[IFA_MAX+1]; | |
3248 | struct in6_addr *addr = NULL; | |
3249 | struct net_device *dev = NULL; | |
3250 | struct inet6_ifaddr *ifa; | |
3251 | struct sk_buff *skb; | |
3252 | int err; | |
3253 | ||
3254 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); | |
3255 | if (err < 0) | |
3256 | goto errout; | |
3257 | ||
3258 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3259 | if (addr == NULL) { | |
3260 | err = -EINVAL; | |
3261 | goto errout; | |
3262 | } | |
3263 | ||
3264 | ifm = nlmsg_data(nlh); | |
3265 | if (ifm->ifa_index) | |
3266 | dev = __dev_get_by_index(ifm->ifa_index); | |
3267 | ||
3268 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { | |
3269 | err = -EADDRNOTAVAIL; | |
3270 | goto errout; | |
3271 | } | |
3272 | ||
3273 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { | |
3274 | err = -ENOBUFS; | |
3275 | goto errout_ifa; | |
3276 | } | |
3277 | ||
3278 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, | |
3279 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
3280 | if (err < 0) { | |
3281 | kfree_skb(skb); | |
3282 | goto errout_ifa; | |
3283 | } | |
3284 | ||
3285 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); | |
3286 | errout_ifa: | |
3287 | in6_ifa_put(ifa); | |
3288 | errout: | |
3289 | return err; | |
3290 | } | |
3291 | ||
3292 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) | |
3293 | { | |
3294 | struct sk_buff *skb; | |
3295 | int err = -ENOBUFS; | |
3296 | ||
3297 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); | |
3298 | if (skb == NULL) | |
3299 | goto errout; | |
3300 | ||
3301 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
3302 | if (err < 0) { | |
3303 | kfree_skb(skb); | |
3304 | goto errout; | |
3305 | } | |
3306 | ||
3307 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3308 | errout: | |
3309 | if (err < 0) | |
3310 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
3311 | } | |
3312 | ||
3313 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3314 | __s32 *array, int bytes) | |
3315 | { | |
3316 | memset(array, 0, bytes); | |
3317 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3318 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3319 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3320 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3321 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3322 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3323 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3324 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3325 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3326 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3327 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3328 | #ifdef CONFIG_IPV6_PRIVACY | |
3329 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3330 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3331 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3332 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3333 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3334 | #endif | |
3335 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
3336 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; | |
3337 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; | |
3338 | #ifdef CONFIG_IPV6_ROUTER_PREF | |
3339 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
3340 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; | |
3341 | #ifdef CONFIV_IPV6_ROUTE_INFO | |
3342 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; | |
3343 | #endif | |
3344 | #endif | |
3345 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; | |
3346 | } | |
3347 | ||
3348 | /* Maximum length of ifinfomsg attributes */ | |
3349 | #define INET6_IFINFO_RTA_SPACE \ | |
3350 | RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \ | |
3351 | RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \ | |
3352 | RTA_SPACE(sizeof(u32)) /* MTU */ + \ | |
3353 | RTA_SPACE(sizeof(int)) /* LINK */ + \ | |
3354 | RTA_SPACE(0) /* PROTINFO */ + \ | |
3355 | RTA_SPACE(sizeof(u32)) /* FLAGS */ + \ | |
3356 | RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \ | |
3357 | RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */ | |
3358 | ||
3359 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, | |
3360 | u32 pid, u32 seq, int event, unsigned int flags) | |
3361 | { | |
3362 | struct net_device *dev = idev->dev; | |
3363 | __s32 *array = NULL; | |
3364 | struct ifinfomsg *r; | |
3365 | struct nlmsghdr *nlh; | |
3366 | unsigned char *b = skb->tail; | |
3367 | struct rtattr *subattr; | |
3368 | __u32 mtu = dev->mtu; | |
3369 | struct ifla_cacheinfo ci; | |
3370 | ||
3371 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); | |
3372 | r = NLMSG_DATA(nlh); | |
3373 | r->ifi_family = AF_INET6; | |
3374 | r->__ifi_pad = 0; | |
3375 | r->ifi_type = dev->type; | |
3376 | r->ifi_index = dev->ifindex; | |
3377 | r->ifi_flags = dev_get_flags(dev); | |
3378 | r->ifi_change = 0; | |
3379 | ||
3380 | RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); | |
3381 | ||
3382 | if (dev->addr_len) | |
3383 | RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); | |
3384 | ||
3385 | RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); | |
3386 | if (dev->ifindex != dev->iflink) | |
3387 | RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink); | |
3388 | ||
3389 | subattr = (struct rtattr*)skb->tail; | |
3390 | ||
3391 | RTA_PUT(skb, IFLA_PROTINFO, 0, NULL); | |
3392 | ||
3393 | /* return the device flags */ | |
3394 | RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags); | |
3395 | ||
3396 | /* return interface cacheinfo */ | |
3397 | ci.max_reasm_len = IPV6_MAXPLEN; | |
3398 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3399 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3400 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3401 | ci.retrans_time = idev->nd_parms->retrans_time; | |
3402 | RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); | |
3403 | ||
3404 | /* return the device sysctl params */ | |
3405 | if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL) | |
3406 | goto rtattr_failure; | |
3407 | ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array)); | |
3408 | RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array); | |
3409 | ||
3410 | /* XXX - Statistics/MC not implemented */ | |
3411 | subattr->rta_len = skb->tail - (u8*)subattr; | |
3412 | ||
3413 | nlh->nlmsg_len = skb->tail - b; | |
3414 | kfree(array); | |
3415 | return skb->len; | |
3416 | ||
3417 | nlmsg_failure: | |
3418 | rtattr_failure: | |
3419 | kfree(array); | |
3420 | skb_trim(skb, b - skb->data); | |
3421 | return -1; | |
3422 | } | |
3423 | ||
3424 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3425 | { | |
3426 | int idx, err; | |
3427 | int s_idx = cb->args[0]; | |
3428 | struct net_device *dev; | |
3429 | struct inet6_dev *idev; | |
3430 | ||
3431 | read_lock(&dev_base_lock); | |
3432 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3433 | if (idx < s_idx) | |
3434 | continue; | |
3435 | if ((idev = in6_dev_get(dev)) == NULL) | |
3436 | continue; | |
3437 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, | |
3438 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); | |
3439 | in6_dev_put(idev); | |
3440 | if (err <= 0) | |
3441 | break; | |
3442 | } | |
3443 | read_unlock(&dev_base_lock); | |
3444 | cb->args[0] = idx; | |
3445 | ||
3446 | return skb->len; | |
3447 | } | |
3448 | ||
3449 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3450 | { | |
3451 | struct sk_buff *skb; | |
3452 | int payload = sizeof(struct ifinfomsg) + INET6_IFINFO_RTA_SPACE; | |
3453 | int err = -ENOBUFS; | |
3454 | ||
3455 | skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC); | |
3456 | if (skb == NULL) | |
3457 | goto errout; | |
3458 | ||
3459 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
3460 | if (err < 0) { | |
3461 | kfree_skb(skb); | |
3462 | goto errout; | |
3463 | } | |
3464 | ||
3465 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3466 | errout: | |
3467 | if (err < 0) | |
3468 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
3469 | } | |
3470 | ||
3471 | /* Maximum length of prefix_cacheinfo attributes */ | |
3472 | #define INET6_PREFIX_RTA_SPACE \ | |
3473 | RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \ | |
3474 | RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */ | |
3475 | ||
3476 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, | |
3477 | struct prefix_info *pinfo, u32 pid, u32 seq, | |
3478 | int event, unsigned int flags) | |
3479 | { | |
3480 | struct prefixmsg *pmsg; | |
3481 | struct nlmsghdr *nlh; | |
3482 | unsigned char *b = skb->tail; | |
3483 | struct prefix_cacheinfo ci; | |
3484 | ||
3485 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); | |
3486 | pmsg = NLMSG_DATA(nlh); | |
3487 | pmsg->prefix_family = AF_INET6; | |
3488 | pmsg->prefix_pad1 = 0; | |
3489 | pmsg->prefix_pad2 = 0; | |
3490 | pmsg->prefix_ifindex = idev->dev->ifindex; | |
3491 | pmsg->prefix_len = pinfo->prefix_len; | |
3492 | pmsg->prefix_type = pinfo->type; | |
3493 | pmsg->prefix_pad3 = 0; | |
3494 | ||
3495 | pmsg->prefix_flags = 0; | |
3496 | if (pinfo->onlink) | |
3497 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3498 | if (pinfo->autoconf) | |
3499 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3500 | ||
3501 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); | |
3502 | ||
3503 | ci.preferred_time = ntohl(pinfo->prefered); | |
3504 | ci.valid_time = ntohl(pinfo->valid); | |
3505 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); | |
3506 | ||
3507 | nlh->nlmsg_len = skb->tail - b; | |
3508 | return skb->len; | |
3509 | ||
3510 | nlmsg_failure: | |
3511 | rtattr_failure: | |
3512 | skb_trim(skb, b - skb->data); | |
3513 | return -1; | |
3514 | } | |
3515 | ||
3516 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
3517 | struct prefix_info *pinfo) | |
3518 | { | |
3519 | struct sk_buff *skb; | |
3520 | int payload = sizeof(struct prefixmsg) + INET6_PREFIX_RTA_SPACE; | |
3521 | int err = -ENOBUFS; | |
3522 | ||
3523 | skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC); | |
3524 | if (skb == NULL) | |
3525 | goto errout; | |
3526 | ||
3527 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
3528 | if (err < 0) { | |
3529 | kfree_skb(skb); | |
3530 | goto errout; | |
3531 | } | |
3532 | ||
3533 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); | |
3534 | errout: | |
3535 | if (err < 0) | |
3536 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
3537 | } | |
3538 | ||
3539 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { | |
3540 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, | |
3541 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3542 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
3543 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, | |
3544 | .dumpit = inet6_dump_ifaddr, }, | |
3545 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, | |
3546 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3547 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3548 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3549 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3550 | .dumpit = inet6_dump_fib, }, | |
3551 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
3552 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, | |
3553 | #endif | |
3554 | }; | |
3555 | ||
3556 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3557 | { | |
3558 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3559 | ||
3560 | switch (event) { | |
3561 | case RTM_NEWADDR: | |
3562 | ip6_ins_rt(ifp->rt); | |
3563 | if (ifp->idev->cnf.forwarding) | |
3564 | addrconf_join_anycast(ifp); | |
3565 | break; | |
3566 | case RTM_DELADDR: | |
3567 | if (ifp->idev->cnf.forwarding) | |
3568 | addrconf_leave_anycast(ifp); | |
3569 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3570 | dst_hold(&ifp->rt->u.dst); | |
3571 | if (ip6_del_rt(ifp->rt)) | |
3572 | dst_free(&ifp->rt->u.dst); | |
3573 | break; | |
3574 | } | |
3575 | } | |
3576 | ||
3577 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3578 | { | |
3579 | rcu_read_lock_bh(); | |
3580 | if (likely(ifp->idev->dead == 0)) | |
3581 | __ipv6_ifa_notify(event, ifp); | |
3582 | rcu_read_unlock_bh(); | |
3583 | } | |
3584 | ||
3585 | #ifdef CONFIG_SYSCTL | |
3586 | ||
3587 | static | |
3588 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3589 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3590 | { | |
3591 | int *valp = ctl->data; | |
3592 | int val = *valp; | |
3593 | int ret; | |
3594 | ||
3595 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3596 | ||
3597 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3598 | if (valp != &ipv6_devconf.forwarding) { | |
3599 | if ((!*valp) ^ (!val)) { | |
3600 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3601 | if (idev == NULL) | |
3602 | return ret; | |
3603 | dev_forward_change(idev); | |
3604 | } | |
3605 | } else { | |
3606 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3607 | addrconf_forward_change(); | |
3608 | } | |
3609 | if (*valp) | |
3610 | rt6_purge_dflt_routers(); | |
3611 | } | |
3612 | ||
3613 | return ret; | |
3614 | } | |
3615 | ||
3616 | static int addrconf_sysctl_forward_strategy(ctl_table *table, | |
3617 | int __user *name, int nlen, | |
3618 | void __user *oldval, | |
3619 | size_t __user *oldlenp, | |
3620 | void __user *newval, size_t newlen, | |
3621 | void **context) | |
3622 | { | |
3623 | int *valp = table->data; | |
3624 | int new; | |
3625 | ||
3626 | if (!newval || !newlen) | |
3627 | return 0; | |
3628 | if (newlen != sizeof(int)) | |
3629 | return -EINVAL; | |
3630 | if (get_user(new, (int __user *)newval)) | |
3631 | return -EFAULT; | |
3632 | if (new == *valp) | |
3633 | return 0; | |
3634 | if (oldval && oldlenp) { | |
3635 | size_t len; | |
3636 | if (get_user(len, oldlenp)) | |
3637 | return -EFAULT; | |
3638 | if (len) { | |
3639 | if (len > table->maxlen) | |
3640 | len = table->maxlen; | |
3641 | if (copy_to_user(oldval, valp, len)) | |
3642 | return -EFAULT; | |
3643 | if (put_user(len, oldlenp)) | |
3644 | return -EFAULT; | |
3645 | } | |
3646 | } | |
3647 | ||
3648 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3649 | if (valp != &ipv6_devconf.forwarding) { | |
3650 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3651 | int changed; | |
3652 | if (unlikely(idev == NULL)) | |
3653 | return -ENODEV; | |
3654 | changed = (!*valp) ^ (!new); | |
3655 | *valp = new; | |
3656 | if (changed) | |
3657 | dev_forward_change(idev); | |
3658 | } else { | |
3659 | *valp = new; | |
3660 | addrconf_forward_change(); | |
3661 | } | |
3662 | ||
3663 | if (*valp) | |
3664 | rt6_purge_dflt_routers(); | |
3665 | } else | |
3666 | *valp = new; | |
3667 | ||
3668 | return 1; | |
3669 | } | |
3670 | ||
3671 | static struct addrconf_sysctl_table | |
3672 | { | |
3673 | struct ctl_table_header *sysctl_header; | |
3674 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3675 | ctl_table addrconf_dev[2]; | |
3676 | ctl_table addrconf_conf_dir[2]; | |
3677 | ctl_table addrconf_proto_dir[2]; | |
3678 | ctl_table addrconf_root_dir[2]; | |
3679 | } addrconf_sysctl __read_mostly = { | |
3680 | .sysctl_header = NULL, | |
3681 | .addrconf_vars = { | |
3682 | { | |
3683 | .ctl_name = NET_IPV6_FORWARDING, | |
3684 | .procname = "forwarding", | |
3685 | .data = &ipv6_devconf.forwarding, | |
3686 | .maxlen = sizeof(int), | |
3687 | .mode = 0644, | |
3688 | .proc_handler = &addrconf_sysctl_forward, | |
3689 | .strategy = &addrconf_sysctl_forward_strategy, | |
3690 | }, | |
3691 | { | |
3692 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3693 | .procname = "hop_limit", | |
3694 | .data = &ipv6_devconf.hop_limit, | |
3695 | .maxlen = sizeof(int), | |
3696 | .mode = 0644, | |
3697 | .proc_handler = proc_dointvec, | |
3698 | }, | |
3699 | { | |
3700 | .ctl_name = NET_IPV6_MTU, | |
3701 | .procname = "mtu", | |
3702 | .data = &ipv6_devconf.mtu6, | |
3703 | .maxlen = sizeof(int), | |
3704 | .mode = 0644, | |
3705 | .proc_handler = &proc_dointvec, | |
3706 | }, | |
3707 | { | |
3708 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3709 | .procname = "accept_ra", | |
3710 | .data = &ipv6_devconf.accept_ra, | |
3711 | .maxlen = sizeof(int), | |
3712 | .mode = 0644, | |
3713 | .proc_handler = &proc_dointvec, | |
3714 | }, | |
3715 | { | |
3716 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3717 | .procname = "accept_redirects", | |
3718 | .data = &ipv6_devconf.accept_redirects, | |
3719 | .maxlen = sizeof(int), | |
3720 | .mode = 0644, | |
3721 | .proc_handler = &proc_dointvec, | |
3722 | }, | |
3723 | { | |
3724 | .ctl_name = NET_IPV6_AUTOCONF, | |
3725 | .procname = "autoconf", | |
3726 | .data = &ipv6_devconf.autoconf, | |
3727 | .maxlen = sizeof(int), | |
3728 | .mode = 0644, | |
3729 | .proc_handler = &proc_dointvec, | |
3730 | }, | |
3731 | { | |
3732 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3733 | .procname = "dad_transmits", | |
3734 | .data = &ipv6_devconf.dad_transmits, | |
3735 | .maxlen = sizeof(int), | |
3736 | .mode = 0644, | |
3737 | .proc_handler = &proc_dointvec, | |
3738 | }, | |
3739 | { | |
3740 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3741 | .procname = "router_solicitations", | |
3742 | .data = &ipv6_devconf.rtr_solicits, | |
3743 | .maxlen = sizeof(int), | |
3744 | .mode = 0644, | |
3745 | .proc_handler = &proc_dointvec, | |
3746 | }, | |
3747 | { | |
3748 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3749 | .procname = "router_solicitation_interval", | |
3750 | .data = &ipv6_devconf.rtr_solicit_interval, | |
3751 | .maxlen = sizeof(int), | |
3752 | .mode = 0644, | |
3753 | .proc_handler = &proc_dointvec_jiffies, | |
3754 | .strategy = &sysctl_jiffies, | |
3755 | }, | |
3756 | { | |
3757 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3758 | .procname = "router_solicitation_delay", | |
3759 | .data = &ipv6_devconf.rtr_solicit_delay, | |
3760 | .maxlen = sizeof(int), | |
3761 | .mode = 0644, | |
3762 | .proc_handler = &proc_dointvec_jiffies, | |
3763 | .strategy = &sysctl_jiffies, | |
3764 | }, | |
3765 | { | |
3766 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3767 | .procname = "force_mld_version", | |
3768 | .data = &ipv6_devconf.force_mld_version, | |
3769 | .maxlen = sizeof(int), | |
3770 | .mode = 0644, | |
3771 | .proc_handler = &proc_dointvec, | |
3772 | }, | |
3773 | #ifdef CONFIG_IPV6_PRIVACY | |
3774 | { | |
3775 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3776 | .procname = "use_tempaddr", | |
3777 | .data = &ipv6_devconf.use_tempaddr, | |
3778 | .maxlen = sizeof(int), | |
3779 | .mode = 0644, | |
3780 | .proc_handler = &proc_dointvec, | |
3781 | }, | |
3782 | { | |
3783 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3784 | .procname = "temp_valid_lft", | |
3785 | .data = &ipv6_devconf.temp_valid_lft, | |
3786 | .maxlen = sizeof(int), | |
3787 | .mode = 0644, | |
3788 | .proc_handler = &proc_dointvec, | |
3789 | }, | |
3790 | { | |
3791 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3792 | .procname = "temp_prefered_lft", | |
3793 | .data = &ipv6_devconf.temp_prefered_lft, | |
3794 | .maxlen = sizeof(int), | |
3795 | .mode = 0644, | |
3796 | .proc_handler = &proc_dointvec, | |
3797 | }, | |
3798 | { | |
3799 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3800 | .procname = "regen_max_retry", | |
3801 | .data = &ipv6_devconf.regen_max_retry, | |
3802 | .maxlen = sizeof(int), | |
3803 | .mode = 0644, | |
3804 | .proc_handler = &proc_dointvec, | |
3805 | }, | |
3806 | { | |
3807 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3808 | .procname = "max_desync_factor", | |
3809 | .data = &ipv6_devconf.max_desync_factor, | |
3810 | .maxlen = sizeof(int), | |
3811 | .mode = 0644, | |
3812 | .proc_handler = &proc_dointvec, | |
3813 | }, | |
3814 | #endif | |
3815 | { | |
3816 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3817 | .procname = "max_addresses", | |
3818 | .data = &ipv6_devconf.max_addresses, | |
3819 | .maxlen = sizeof(int), | |
3820 | .mode = 0644, | |
3821 | .proc_handler = &proc_dointvec, | |
3822 | }, | |
3823 | { | |
3824 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3825 | .procname = "accept_ra_defrtr", | |
3826 | .data = &ipv6_devconf.accept_ra_defrtr, | |
3827 | .maxlen = sizeof(int), | |
3828 | .mode = 0644, | |
3829 | .proc_handler = &proc_dointvec, | |
3830 | }, | |
3831 | { | |
3832 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3833 | .procname = "accept_ra_pinfo", | |
3834 | .data = &ipv6_devconf.accept_ra_pinfo, | |
3835 | .maxlen = sizeof(int), | |
3836 | .mode = 0644, | |
3837 | .proc_handler = &proc_dointvec, | |
3838 | }, | |
3839 | #ifdef CONFIG_IPV6_ROUTER_PREF | |
3840 | { | |
3841 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3842 | .procname = "accept_ra_rtr_pref", | |
3843 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3844 | .maxlen = sizeof(int), | |
3845 | .mode = 0644, | |
3846 | .proc_handler = &proc_dointvec, | |
3847 | }, | |
3848 | { | |
3849 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3850 | .procname = "router_probe_interval", | |
3851 | .data = &ipv6_devconf.rtr_probe_interval, | |
3852 | .maxlen = sizeof(int), | |
3853 | .mode = 0644, | |
3854 | .proc_handler = &proc_dointvec_jiffies, | |
3855 | .strategy = &sysctl_jiffies, | |
3856 | }, | |
3857 | #ifdef CONFIV_IPV6_ROUTE_INFO | |
3858 | { | |
3859 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3860 | .procname = "accept_ra_rt_info_max_plen", | |
3861 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3862 | .maxlen = sizeof(int), | |
3863 | .mode = 0644, | |
3864 | .proc_handler = &proc_dointvec, | |
3865 | }, | |
3866 | #endif | |
3867 | #endif | |
3868 | { | |
3869 | .ctl_name = NET_IPV6_PROXY_NDP, | |
3870 | .procname = "proxy_ndp", | |
3871 | .data = &ipv6_devconf.proxy_ndp, | |
3872 | .maxlen = sizeof(int), | |
3873 | .mode = 0644, | |
3874 | .proc_handler = &proc_dointvec, | |
3875 | }, | |
3876 | { | |
3877 | .ctl_name = 0, /* sentinel */ | |
3878 | } | |
3879 | }, | |
3880 | .addrconf_dev = { | |
3881 | { | |
3882 | .ctl_name = NET_PROTO_CONF_ALL, | |
3883 | .procname = "all", | |
3884 | .mode = 0555, | |
3885 | .child = addrconf_sysctl.addrconf_vars, | |
3886 | }, | |
3887 | { | |
3888 | .ctl_name = 0, /* sentinel */ | |
3889 | } | |
3890 | }, | |
3891 | .addrconf_conf_dir = { | |
3892 | { | |
3893 | .ctl_name = NET_IPV6_CONF, | |
3894 | .procname = "conf", | |
3895 | .mode = 0555, | |
3896 | .child = addrconf_sysctl.addrconf_dev, | |
3897 | }, | |
3898 | { | |
3899 | .ctl_name = 0, /* sentinel */ | |
3900 | } | |
3901 | }, | |
3902 | .addrconf_proto_dir = { | |
3903 | { | |
3904 | .ctl_name = NET_IPV6, | |
3905 | .procname = "ipv6", | |
3906 | .mode = 0555, | |
3907 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3908 | }, | |
3909 | { | |
3910 | .ctl_name = 0, /* sentinel */ | |
3911 | } | |
3912 | }, | |
3913 | .addrconf_root_dir = { | |
3914 | { | |
3915 | .ctl_name = CTL_NET, | |
3916 | .procname = "net", | |
3917 | .mode = 0555, | |
3918 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3919 | }, | |
3920 | { | |
3921 | .ctl_name = 0, /* sentinel */ | |
3922 | } | |
3923 | }, | |
3924 | }; | |
3925 | ||
3926 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3927 | { | |
3928 | int i; | |
3929 | struct net_device *dev = idev ? idev->dev : NULL; | |
3930 | struct addrconf_sysctl_table *t; | |
3931 | char *dev_name = NULL; | |
3932 | ||
3933 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
3934 | if (t == NULL) | |
3935 | return; | |
3936 | memcpy(t, &addrconf_sysctl, sizeof(*t)); | |
3937 | for (i=0; t->addrconf_vars[i].data; i++) { | |
3938 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
3939 | t->addrconf_vars[i].de = NULL; | |
3940 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
3941 | } | |
3942 | if (dev) { | |
3943 | dev_name = dev->name; | |
3944 | t->addrconf_dev[0].ctl_name = dev->ifindex; | |
3945 | } else { | |
3946 | dev_name = "default"; | |
3947 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3948 | } | |
3949 | ||
3950 | /* | |
3951 | * Make a copy of dev_name, because '.procname' is regarded as const | |
3952 | * by sysctl and we wouldn't want anyone to change it under our feet | |
3953 | * (see SIOCSIFNAME). | |
3954 | */ | |
3955 | dev_name = kstrdup(dev_name, GFP_KERNEL); | |
3956 | if (!dev_name) | |
3957 | goto free; | |
3958 | ||
3959 | t->addrconf_dev[0].procname = dev_name; | |
3960 | ||
3961 | t->addrconf_dev[0].child = t->addrconf_vars; | |
3962 | t->addrconf_dev[0].de = NULL; | |
3963 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
3964 | t->addrconf_conf_dir[0].de = NULL; | |
3965 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
3966 | t->addrconf_proto_dir[0].de = NULL; | |
3967 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
3968 | t->addrconf_root_dir[0].de = NULL; | |
3969 | ||
3970 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
3971 | if (t->sysctl_header == NULL) | |
3972 | goto free_procname; | |
3973 | else | |
3974 | p->sysctl = t; | |
3975 | return; | |
3976 | ||
3977 | /* error path */ | |
3978 | free_procname: | |
3979 | kfree(dev_name); | |
3980 | free: | |
3981 | kfree(t); | |
3982 | ||
3983 | return; | |
3984 | } | |
3985 | ||
3986 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3987 | { | |
3988 | if (p->sysctl) { | |
3989 | struct addrconf_sysctl_table *t = p->sysctl; | |
3990 | p->sysctl = NULL; | |
3991 | unregister_sysctl_table(t->sysctl_header); | |
3992 | kfree(t->addrconf_dev[0].procname); | |
3993 | kfree(t); | |
3994 | } | |
3995 | } | |
3996 | ||
3997 | ||
3998 | #endif | |
3999 | ||
4000 | /* | |
4001 | * Device notifier | |
4002 | */ | |
4003 | ||
4004 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4005 | { | |
4006 | return atomic_notifier_chain_register(&inet6addr_chain, nb); | |
4007 | } | |
4008 | ||
4009 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
4010 | { | |
4011 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); | |
4012 | } | |
4013 | ||
4014 | /* | |
4015 | * Init / cleanup code | |
4016 | */ | |
4017 | ||
4018 | int __init addrconf_init(void) | |
4019 | { | |
4020 | int err = 0; | |
4021 | ||
4022 | /* The addrconf netdev notifier requires that loopback_dev | |
4023 | * has it's ipv6 private information allocated and setup | |
4024 | * before it can bring up and give link-local addresses | |
4025 | * to other devices which are up. | |
4026 | * | |
4027 | * Unfortunately, loopback_dev is not necessarily the first | |
4028 | * entry in the global dev_base list of net devices. In fact, | |
4029 | * it is likely to be the very last entry on that list. | |
4030 | * So this causes the notifier registry below to try and | |
4031 | * give link-local addresses to all devices besides loopback_dev | |
4032 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4033 | * devices to fail to get a link-local address. | |
4034 | * | |
4035 | * So, as a temporary fix, allocate the ipv6 structure for | |
4036 | * loopback_dev first by hand. | |
4037 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4038 | * device and it being up should be removed. | |
4039 | */ | |
4040 | rtnl_lock(); | |
4041 | if (!ipv6_add_dev(&loopback_dev)) | |
4042 | err = -ENOMEM; | |
4043 | rtnl_unlock(); | |
4044 | if (err) | |
4045 | return err; | |
4046 | ||
4047 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); | |
4048 | ||
4049 | register_netdevice_notifier(&ipv6_dev_notf); | |
4050 | ||
4051 | addrconf_verify(0); | |
4052 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4053 | #ifdef CONFIG_SYSCTL | |
4054 | addrconf_sysctl.sysctl_header = | |
4055 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
4056 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
4057 | #endif | |
4058 | ||
4059 | return 0; | |
4060 | } | |
4061 | ||
4062 | void __exit addrconf_cleanup(void) | |
4063 | { | |
4064 | struct net_device *dev; | |
4065 | struct inet6_dev *idev; | |
4066 | struct inet6_ifaddr *ifa; | |
4067 | int i; | |
4068 | ||
4069 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4070 | ||
4071 | rtnetlink_links[PF_INET6] = NULL; | |
4072 | #ifdef CONFIG_SYSCTL | |
4073 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4074 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4075 | #endif | |
4076 | ||
4077 | rtnl_lock(); | |
4078 | ||
4079 | /* | |
4080 | * clean dev list. | |
4081 | */ | |
4082 | ||
4083 | for (dev=dev_base; dev; dev=dev->next) { | |
4084 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4085 | continue; | |
4086 | addrconf_ifdown(dev, 1); | |
4087 | } | |
4088 | addrconf_ifdown(&loopback_dev, 2); | |
4089 | ||
4090 | /* | |
4091 | * Check hash table. | |
4092 | */ | |
4093 | ||
4094 | write_lock_bh(&addrconf_hash_lock); | |
4095 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4096 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4097 | struct inet6_ifaddr *bifa; | |
4098 | ||
4099 | bifa = ifa; | |
4100 | ifa = ifa->lst_next; | |
4101 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4102 | /* Do not free it; something is wrong. | |
4103 | Now we can investigate it with debugger. | |
4104 | */ | |
4105 | } | |
4106 | } | |
4107 | write_unlock_bh(&addrconf_hash_lock); | |
4108 | ||
4109 | del_timer(&addr_chk_timer); | |
4110 | ||
4111 | rtnl_unlock(); | |
4112 | ||
4113 | #ifdef CONFIG_PROC_FS | |
4114 | proc_net_remove("if_inet6"); | |
4115 | #endif | |
4116 | } |