Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
1da177e4 LT |
47 | #include <linux/net.h> |
48 | #include <linux/in6.h> | |
49 | #include <linux/netdevice.h> | |
1823730f | 50 | #include <linux/if_addr.h> |
1da177e4 LT |
51 | #include <linux/if_arp.h> |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 | 64 | |
457c4cbc | 65 | #include <net/net_namespace.h> |
1da177e4 LT |
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> | |
5d620266 | 76 | #include <net/netlink.h> |
1da177e4 LT |
77 | #include <linux/if_tunnel.h> |
78 | #include <linux/rtnetlink.h> | |
79 | ||
80 | #ifdef CONFIG_IPV6_PRIVACY | |
81 | #include <linux/random.h> | |
1da177e4 LT |
82 | #endif |
83 | ||
84 | #include <asm/uaccess.h> | |
7f7d9a6b | 85 | #include <asm/unaligned.h> |
1da177e4 LT |
86 | |
87 | #include <linux/proc_fs.h> | |
88 | #include <linux/seq_file.h> | |
89 | ||
90 | /* Set to 3 to get tracing... */ | |
91 | #define ACONF_DEBUG 2 | |
92 | ||
93 | #if ACONF_DEBUG >= 3 | |
94 | #define ADBG(x) printk x | |
95 | #else | |
96 | #define ADBG(x) | |
97 | #endif | |
98 | ||
99 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
100 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
101 | ||
102 | #ifdef CONFIG_SYSCTL | |
103 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
104 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
105 | #endif | |
106 | ||
107 | #ifdef CONFIG_IPV6_PRIVACY | |
108 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 109 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
110 | static void ipv6_regen_rndid(unsigned long data); |
111 | ||
112 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
113 | #endif |
114 | ||
115 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
116 | ||
117 | /* | |
118 | * Configured unicast address hash table | |
119 | */ | |
120 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
121 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
122 | ||
1da177e4 LT |
123 | static void addrconf_verify(unsigned long); |
124 | ||
8d06afab | 125 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
126 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
127 | ||
128 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
129 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
130 | ||
131 | static int addrconf_ifdown(struct net_device *dev, int how); | |
132 | ||
e431b8c0 | 133 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
134 | static void addrconf_dad_timer(unsigned long data); |
135 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 136 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
137 | static void addrconf_rs_timer(unsigned long data); |
138 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
140 | ||
1ab1457c | 141 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
142 | struct prefix_info *pinfo); |
143 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
144 | ||
e041c683 | 145 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 146 | |
ab32ea5d | 147 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
148 | .forwarding = 0, |
149 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
150 | .mtu6 = IPV6_MIN_MTU, | |
151 | .accept_ra = 1, | |
152 | .accept_redirects = 1, | |
153 | .autoconf = 1, | |
154 | .force_mld_version = 0, | |
155 | .dad_transmits = 1, | |
156 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
157 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
158 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
159 | #ifdef CONFIG_IPV6_PRIVACY | |
160 | .use_tempaddr = 0, | |
161 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
162 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
163 | .regen_max_retry = REGEN_MAX_RETRY, | |
164 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
165 | #endif | |
166 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 167 | .accept_ra_defrtr = 1, |
c4fd30eb | 168 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
169 | #ifdef CONFIG_IPV6_ROUTER_PREF |
170 | .accept_ra_rtr_pref = 1, | |
52e16356 | 171 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
172 | #ifdef CONFIG_IPV6_ROUTE_INFO |
173 | .accept_ra_rt_info_max_plen = 0, | |
174 | #endif | |
930d6ff2 | 175 | #endif |
fbea49e1 | 176 | .proxy_ndp = 0, |
0bcbc926 | 177 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
178 | }; |
179 | ||
ab32ea5d | 180 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
181 | .forwarding = 0, |
182 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
183 | .mtu6 = IPV6_MIN_MTU, | |
184 | .accept_ra = 1, | |
185 | .accept_redirects = 1, | |
186 | .autoconf = 1, | |
187 | .dad_transmits = 1, | |
188 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
189 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
190 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
191 | #ifdef CONFIG_IPV6_PRIVACY | |
192 | .use_tempaddr = 0, | |
193 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
194 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
195 | .regen_max_retry = REGEN_MAX_RETRY, | |
196 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
197 | #endif | |
198 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 199 | .accept_ra_defrtr = 1, |
c4fd30eb | 200 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
201 | #ifdef CONFIG_IPV6_ROUTER_PREF |
202 | .accept_ra_rtr_pref = 1, | |
52e16356 | 203 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
205 | .accept_ra_rt_info_max_plen = 0, | |
206 | #endif | |
930d6ff2 | 207 | #endif |
fbea49e1 | 208 | .proxy_ndp = 0, |
0bcbc926 | 209 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
210 | }; |
211 | ||
212 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 213 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 LT |
214 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
215 | ||
1da177e4 LT |
216 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
217 | { | |
218 | if (del_timer(&ifp->timer)) | |
219 | __in6_ifa_put(ifp); | |
220 | } | |
221 | ||
222 | enum addrconf_timer_t | |
223 | { | |
224 | AC_NONE, | |
225 | AC_DAD, | |
226 | AC_RS, | |
227 | }; | |
228 | ||
229 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
230 | enum addrconf_timer_t what, | |
231 | unsigned long when) | |
232 | { | |
233 | if (!del_timer(&ifp->timer)) | |
234 | in6_ifa_hold(ifp); | |
235 | ||
236 | switch (what) { | |
237 | case AC_DAD: | |
238 | ifp->timer.function = addrconf_dad_timer; | |
239 | break; | |
240 | case AC_RS: | |
241 | ifp->timer.function = addrconf_rs_timer; | |
242 | break; | |
243 | default:; | |
244 | } | |
245 | ifp->timer.expires = jiffies + when; | |
246 | add_timer(&ifp->timer); | |
247 | } | |
248 | ||
7f7d9a6b HX |
249 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
250 | { | |
251 | int err = -ENOMEM; | |
252 | ||
253 | if (!idev || !idev->dev) | |
254 | return -EINVAL; | |
255 | ||
256 | if (snmp_mib_init((void **)idev->stats.ipv6, | |
257 | sizeof(struct ipstats_mib), | |
258 | __alignof__(struct ipstats_mib)) < 0) | |
259 | goto err_ip; | |
260 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
261 | sizeof(struct icmpv6_mib), | |
262 | __alignof__(struct icmpv6_mib)) < 0) | |
263 | goto err_icmp; | |
264 | ||
265 | return 0; | |
266 | ||
267 | err_icmp: | |
268 | snmp_mib_free((void **)idev->stats.ipv6); | |
269 | err_ip: | |
270 | return err; | |
271 | } | |
272 | ||
273 | static int snmp6_free_dev(struct inet6_dev *idev) | |
274 | { | |
275 | snmp_mib_free((void **)idev->stats.icmpv6); | |
276 | snmp_mib_free((void **)idev->stats.ipv6); | |
277 | return 0; | |
278 | } | |
279 | ||
1da177e4 LT |
280 | /* Nobody refers to this device, we may destroy it. */ |
281 | ||
8814c4b5 YH |
282 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
283 | { | |
284 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
285 | kfree(idev); | |
286 | } | |
287 | ||
1da177e4 LT |
288 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
289 | { | |
290 | struct net_device *dev = idev->dev; | |
291 | BUG_TRAP(idev->addr_list==NULL); | |
292 | BUG_TRAP(idev->mc_list==NULL); | |
293 | #ifdef NET_REFCNT_DEBUG | |
294 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
295 | #endif | |
296 | dev_put(dev); | |
297 | if (!idev->dead) { | |
298 | printk("Freeing alive inet6 device %p\n", idev); | |
299 | return; | |
300 | } | |
301 | snmp6_free_dev(idev); | |
8814c4b5 | 302 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
303 | } |
304 | ||
7159039a YH |
305 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
306 | ||
1da177e4 LT |
307 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
308 | { | |
309 | struct inet6_dev *ndev; | |
d88ae4cc | 310 | struct in6_addr maddr; |
1da177e4 LT |
311 | |
312 | ASSERT_RTNL(); | |
313 | ||
314 | if (dev->mtu < IPV6_MIN_MTU) | |
315 | return NULL; | |
316 | ||
1ab1457c | 317 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 318 | |
1ab1457c YH |
319 | if (ndev == NULL) |
320 | return NULL; | |
322f74a4 IO |
321 | |
322 | rwlock_init(&ndev->lock); | |
323 | ndev->dev = dev; | |
324 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
325 | ndev->cnf.mtu6 = dev->mtu; | |
326 | ndev->cnf.sysctl = NULL; | |
327 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
328 | if (ndev->nd_parms == NULL) { | |
329 | kfree(ndev); | |
330 | return NULL; | |
331 | } | |
332 | /* We refer to the device */ | |
333 | dev_hold(dev); | |
1da177e4 | 334 | |
322f74a4 IO |
335 | if (snmp6_alloc_dev(ndev) < 0) { |
336 | ADBG((KERN_WARNING | |
337 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
338 | __FUNCTION__, dev->name)); | |
339 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
340 | ndev->dead = 1; | |
341 | in6_dev_finish_destroy(ndev); | |
342 | return NULL; | |
343 | } | |
1da177e4 | 344 | |
322f74a4 IO |
345 | if (snmp6_register_dev(ndev) < 0) { |
346 | ADBG((KERN_WARNING | |
347 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
348 | __FUNCTION__, dev->name)); | |
349 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
350 | ndev->dead = 1; | |
351 | in6_dev_finish_destroy(ndev); | |
352 | return NULL; | |
353 | } | |
354 | ||
355 | /* One reference from device. We must do this before | |
356 | * we invoke __ipv6_regen_rndid(). | |
357 | */ | |
358 | in6_dev_hold(ndev); | |
1da177e4 LT |
359 | |
360 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
361 | init_timer(&ndev->regen_timer); |
362 | ndev->regen_timer.function = ipv6_regen_rndid; | |
363 | ndev->regen_timer.data = (unsigned long) ndev; | |
364 | if ((dev->flags&IFF_LOOPBACK) || | |
365 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
366 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
367 | dev->type == ARPHRD_SIT || | |
368 | #endif | |
369 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
370 | printk(KERN_INFO |
371 | "%s: Disabled Privacy Extensions\n", | |
372 | dev->name); | |
373 | ndev->cnf.use_tempaddr = -1; | |
374 | } else { | |
375 | in6_dev_hold(ndev); | |
376 | ipv6_regen_rndid((unsigned long) ndev); | |
377 | } | |
1da177e4 LT |
378 | #endif |
379 | ||
53aadcc9 HX |
380 | if (netif_running(dev) && netif_carrier_ok(dev)) |
381 | ndev->if_flags |= IF_READY; | |
382 | ||
322f74a4 IO |
383 | ipv6_mc_init_dev(ndev); |
384 | ndev->tstamp = jiffies; | |
1da177e4 | 385 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
386 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
387 | NET_IPV6_NEIGH, "ipv6", | |
388 | &ndisc_ifinfo_sysctl_change, | |
389 | NULL); | |
390 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 391 | #endif |
30c4cf57 DS |
392 | /* protected by rtnl_lock */ |
393 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
394 | |
395 | /* Join all-node multicast group */ | |
396 | ipv6_addr_all_nodes(&maddr); | |
397 | ipv6_dev_mc_inc(dev, &maddr); | |
398 | ||
1da177e4 LT |
399 | return ndev; |
400 | } | |
401 | ||
402 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
403 | { | |
404 | struct inet6_dev *idev; | |
405 | ||
406 | ASSERT_RTNL(); | |
407 | ||
408 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
409 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
410 | return NULL; | |
411 | } | |
c5e33bdd | 412 | |
1da177e4 LT |
413 | if (dev->flags&IFF_UP) |
414 | ipv6_mc_up(idev); | |
415 | return idev; | |
416 | } | |
417 | ||
418 | #ifdef CONFIG_SYSCTL | |
419 | static void dev_forward_change(struct inet6_dev *idev) | |
420 | { | |
421 | struct net_device *dev; | |
422 | struct inet6_ifaddr *ifa; | |
423 | struct in6_addr addr; | |
424 | ||
425 | if (!idev) | |
426 | return; | |
427 | dev = idev->dev; | |
428 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
429 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 430 | |
1da177e4 LT |
431 | if (idev->cnf.forwarding) |
432 | ipv6_dev_mc_inc(dev, &addr); | |
433 | else | |
434 | ipv6_dev_mc_dec(dev, &addr); | |
435 | } | |
436 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
437 | if (ifa->flags&IFA_F_TENTATIVE) |
438 | continue; | |
1da177e4 LT |
439 | if (idev->cnf.forwarding) |
440 | addrconf_join_anycast(ifa); | |
441 | else | |
442 | addrconf_leave_anycast(ifa); | |
443 | } | |
444 | } | |
445 | ||
446 | ||
447 | static void addrconf_forward_change(void) | |
448 | { | |
449 | struct net_device *dev; | |
450 | struct inet6_dev *idev; | |
451 | ||
452 | read_lock(&dev_base_lock); | |
7562f876 | 453 | for_each_netdev(dev) { |
8814c4b5 | 454 | rcu_read_lock(); |
1da177e4 LT |
455 | idev = __in6_dev_get(dev); |
456 | if (idev) { | |
457 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
458 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
459 | if (changed) | |
460 | dev_forward_change(idev); | |
461 | } | |
8814c4b5 | 462 | rcu_read_unlock(); |
1da177e4 LT |
463 | } |
464 | read_unlock(&dev_base_lock); | |
465 | } | |
466 | #endif | |
467 | ||
468 | /* Nobody refers to this ifaddr, destroy it */ | |
469 | ||
470 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
471 | { | |
472 | BUG_TRAP(ifp->if_next==NULL); | |
473 | BUG_TRAP(ifp->lst_next==NULL); | |
474 | #ifdef NET_REFCNT_DEBUG | |
475 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
476 | #endif | |
477 | ||
478 | in6_dev_put(ifp->idev); | |
479 | ||
480 | if (del_timer(&ifp->timer)) | |
481 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
482 | ||
483 | if (!ifp->dead) { | |
484 | printk("Freeing alive inet6 address %p\n", ifp); | |
485 | return; | |
486 | } | |
487 | dst_release(&ifp->rt->u.dst); | |
488 | ||
489 | kfree(ifp); | |
490 | } | |
491 | ||
e55ffac6 BH |
492 | static void |
493 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
494 | { | |
495 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 496 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
497 | |
498 | /* | |
499 | * Each device address list is sorted in order of scope - | |
500 | * global before linklocal. | |
501 | */ | |
502 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
503 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 504 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
505 | break; |
506 | } | |
507 | ||
508 | ifp->if_next = *ifap; | |
509 | *ifap = ifp; | |
510 | } | |
511 | ||
1da177e4 LT |
512 | /* On success it returns ifp with increased reference count */ |
513 | ||
514 | static struct inet6_ifaddr * | |
515 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 516 | int scope, u32 flags) |
1da177e4 LT |
517 | { |
518 | struct inet6_ifaddr *ifa = NULL; | |
519 | struct rt6_info *rt; | |
520 | int hash; | |
521 | int err = 0; | |
522 | ||
8814c4b5 | 523 | rcu_read_lock_bh(); |
1da177e4 LT |
524 | if (idev->dead) { |
525 | err = -ENODEV; /*XXX*/ | |
526 | goto out2; | |
527 | } | |
528 | ||
529 | write_lock(&addrconf_hash_lock); | |
530 | ||
531 | /* Ignore adding duplicate addresses on an interface */ | |
532 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
533 | ADBG(("ipv6_add_addr: already assigned\n")); | |
534 | err = -EEXIST; | |
535 | goto out; | |
536 | } | |
537 | ||
322f74a4 | 538 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
539 | |
540 | if (ifa == NULL) { | |
541 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
542 | err = -ENOBUFS; | |
543 | goto out; | |
544 | } | |
545 | ||
546 | rt = addrconf_dst_alloc(idev, addr, 0); | |
547 | if (IS_ERR(rt)) { | |
548 | err = PTR_ERR(rt); | |
549 | goto out; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | ipv6_addr_copy(&ifa->addr, addr); |
553 | ||
554 | spin_lock_init(&ifa->lock); | |
555 | init_timer(&ifa->timer); | |
556 | ifa->timer.data = (unsigned long) ifa; | |
557 | ifa->scope = scope; | |
558 | ifa->prefix_len = pfxlen; | |
559 | ifa->flags = flags | IFA_F_TENTATIVE; | |
560 | ifa->cstamp = ifa->tstamp = jiffies; | |
561 | ||
57f5f544 KF |
562 | ifa->rt = rt; |
563 | ||
95c385b4 NH |
564 | /* |
565 | * part one of RFC 4429, section 3.3 | |
566 | * We should not configure an address as | |
567 | * optimistic if we do not yet know the link | |
568 | * layer address of our nexhop router | |
569 | */ | |
570 | ||
571 | if (rt->rt6i_nexthop == NULL) | |
572 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
573 | ||
1da177e4 LT |
574 | ifa->idev = idev; |
575 | in6_dev_hold(idev); | |
576 | /* For caller */ | |
577 | in6_ifa_hold(ifa); | |
578 | ||
579 | /* Add to big hash table */ | |
580 | hash = ipv6_addr_hash(addr); | |
581 | ||
582 | ifa->lst_next = inet6_addr_lst[hash]; | |
583 | inet6_addr_lst[hash] = ifa; | |
584 | in6_ifa_hold(ifa); | |
585 | write_unlock(&addrconf_hash_lock); | |
586 | ||
587 | write_lock(&idev->lock); | |
588 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 589 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
590 | |
591 | #ifdef CONFIG_IPV6_PRIVACY | |
592 | if (ifa->flags&IFA_F_TEMPORARY) { | |
593 | ifa->tmp_next = idev->tempaddr_list; | |
594 | idev->tempaddr_list = ifa; | |
595 | in6_ifa_hold(ifa); | |
596 | } | |
597 | #endif | |
598 | ||
1da177e4 LT |
599 | in6_ifa_hold(ifa); |
600 | write_unlock(&idev->lock); | |
601 | out2: | |
8814c4b5 | 602 | rcu_read_unlock_bh(); |
1da177e4 | 603 | |
fd92833a | 604 | if (likely(err == 0)) |
e041c683 | 605 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
606 | else { |
607 | kfree(ifa); | |
608 | ifa = ERR_PTR(err); | |
609 | } | |
610 | ||
611 | return ifa; | |
612 | out: | |
613 | write_unlock(&addrconf_hash_lock); | |
614 | goto out2; | |
615 | } | |
616 | ||
617 | /* This function wants to get referenced ifp and releases it before return */ | |
618 | ||
619 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
620 | { | |
621 | struct inet6_ifaddr *ifa, **ifap; | |
622 | struct inet6_dev *idev = ifp->idev; | |
623 | int hash; | |
624 | int deleted = 0, onlink = 0; | |
625 | unsigned long expires = jiffies; | |
626 | ||
627 | hash = ipv6_addr_hash(&ifp->addr); | |
628 | ||
629 | ifp->dead = 1; | |
630 | ||
631 | write_lock_bh(&addrconf_hash_lock); | |
632 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
633 | ifap = &ifa->lst_next) { | |
634 | if (ifa == ifp) { | |
635 | *ifap = ifa->lst_next; | |
636 | __in6_ifa_put(ifp); | |
637 | ifa->lst_next = NULL; | |
638 | break; | |
639 | } | |
640 | } | |
641 | write_unlock_bh(&addrconf_hash_lock); | |
642 | ||
643 | write_lock_bh(&idev->lock); | |
644 | #ifdef CONFIG_IPV6_PRIVACY | |
645 | if (ifp->flags&IFA_F_TEMPORARY) { | |
646 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
647 | ifap = &ifa->tmp_next) { | |
648 | if (ifa == ifp) { | |
649 | *ifap = ifa->tmp_next; | |
650 | if (ifp->ifpub) { | |
651 | in6_ifa_put(ifp->ifpub); | |
652 | ifp->ifpub = NULL; | |
653 | } | |
654 | __in6_ifa_put(ifp); | |
655 | ifa->tmp_next = NULL; | |
656 | break; | |
657 | } | |
658 | } | |
659 | } | |
660 | #endif | |
661 | ||
1d142804 | 662 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
663 | if (ifa == ifp) { |
664 | *ifap = ifa->if_next; | |
665 | __in6_ifa_put(ifp); | |
666 | ifa->if_next = NULL; | |
667 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
668 | break; | |
669 | deleted = 1; | |
1d142804 | 670 | continue; |
1da177e4 LT |
671 | } else if (ifp->flags & IFA_F_PERMANENT) { |
672 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
673 | ifp->prefix_len)) { | |
674 | if (ifa->flags & IFA_F_PERMANENT) { | |
675 | onlink = 1; | |
676 | if (deleted) | |
677 | break; | |
678 | } else { | |
679 | unsigned long lifetime; | |
680 | ||
681 | if (!onlink) | |
682 | onlink = -1; | |
683 | ||
684 | spin_lock(&ifa->lock); | |
685 | lifetime = min_t(unsigned long, | |
686 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
687 | if (time_before(expires, | |
688 | ifa->tstamp + lifetime * HZ)) | |
689 | expires = ifa->tstamp + lifetime * HZ; | |
690 | spin_unlock(&ifa->lock); | |
691 | } | |
692 | } | |
693 | } | |
1d142804 | 694 | ifap = &ifa->if_next; |
1da177e4 LT |
695 | } |
696 | write_unlock_bh(&idev->lock); | |
697 | ||
698 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
699 | ||
e041c683 | 700 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
701 | |
702 | addrconf_del_timer(ifp); | |
703 | ||
704 | /* | |
705 | * Purge or update corresponding prefix | |
706 | * | |
707 | * 1) we don't purge prefix here if address was not permanent. | |
708 | * prefix is managed by its own lifetime. | |
709 | * 2) if there're no addresses, delete prefix. | |
710 | * 3) if there're still other permanent address(es), | |
711 | * corresponding prefix is still permanent. | |
712 | * 4) otherwise, update prefix lifetime to the | |
713 | * longest valid lifetime among the corresponding | |
714 | * addresses on the device. | |
715 | * Note: subsequent RA will update lifetime. | |
716 | * | |
717 | * --yoshfuji | |
718 | */ | |
719 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
720 | struct in6_addr prefix; | |
721 | struct rt6_info *rt; | |
722 | ||
723 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
724 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
725 | ||
726 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
727 | if (onlink == 0) { | |
e0a1ad73 | 728 | ip6_del_rt(rt); |
1da177e4 LT |
729 | rt = NULL; |
730 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
731 | rt->rt6i_expires = expires; | |
732 | rt->rt6i_flags |= RTF_EXPIRES; | |
733 | } | |
734 | } | |
735 | dst_release(&rt->u.dst); | |
736 | } | |
737 | ||
738 | in6_ifa_put(ifp); | |
739 | } | |
740 | ||
741 | #ifdef CONFIG_IPV6_PRIVACY | |
742 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
743 | { | |
744 | struct inet6_dev *idev = ifp->idev; | |
745 | struct in6_addr addr, *tmpaddr; | |
746 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
747 | int tmp_plen; | |
748 | int ret = 0; | |
749 | int max_addresses; | |
95c385b4 | 750 | u32 addr_flags; |
1da177e4 LT |
751 | |
752 | write_lock(&idev->lock); | |
753 | if (ift) { | |
754 | spin_lock_bh(&ift->lock); | |
755 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
756 | spin_unlock_bh(&ift->lock); | |
757 | tmpaddr = &addr; | |
758 | } else { | |
759 | tmpaddr = NULL; | |
760 | } | |
761 | retry: | |
762 | in6_dev_hold(idev); | |
763 | if (idev->cnf.use_tempaddr <= 0) { | |
764 | write_unlock(&idev->lock); | |
765 | printk(KERN_INFO | |
766 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
767 | in6_dev_put(idev); | |
768 | ret = -1; | |
769 | goto out; | |
770 | } | |
771 | spin_lock_bh(&ifp->lock); | |
772 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
773 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
774 | spin_unlock_bh(&ifp->lock); | |
775 | write_unlock(&idev->lock); | |
776 | printk(KERN_WARNING | |
777 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
778 | in6_dev_put(idev); | |
779 | ret = -1; | |
780 | goto out; | |
781 | } | |
782 | in6_ifa_hold(ifp); | |
783 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
784 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
785 | spin_unlock_bh(&ifp->lock); | |
786 | write_unlock(&idev->lock); | |
787 | printk(KERN_WARNING | |
788 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
789 | in6_ifa_put(ifp); | |
790 | in6_dev_put(idev); | |
791 | ret = -1; | |
792 | goto out; | |
793 | } | |
794 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
795 | tmp_valid_lft = min_t(__u32, | |
796 | ifp->valid_lft, | |
797 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
798 | tmp_prefered_lft = min_t(__u32, |
799 | ifp->prefered_lft, | |
1da177e4 LT |
800 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
801 | tmp_plen = ifp->prefix_len; | |
802 | max_addresses = idev->cnf.max_addresses; | |
803 | tmp_cstamp = ifp->cstamp; | |
804 | tmp_tstamp = ifp->tstamp; | |
805 | spin_unlock_bh(&ifp->lock); | |
806 | ||
807 | write_unlock(&idev->lock); | |
95c385b4 NH |
808 | |
809 | addr_flags = IFA_F_TEMPORARY; | |
810 | /* set in addrconf_prefix_rcv() */ | |
811 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
812 | addr_flags |= IFA_F_OPTIMISTIC; | |
813 | ||
1da177e4 | 814 | ift = !max_addresses || |
1ab1457c | 815 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 816 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
817 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
818 | addr_flags) : NULL; | |
1da177e4 LT |
819 | if (!ift || IS_ERR(ift)) { |
820 | in6_ifa_put(ifp); | |
821 | in6_dev_put(idev); | |
822 | printk(KERN_INFO | |
823 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
824 | tmpaddr = &addr; | |
825 | write_lock(&idev->lock); | |
826 | goto retry; | |
827 | } | |
828 | ||
829 | spin_lock_bh(&ift->lock); | |
830 | ift->ifpub = ifp; | |
831 | ift->valid_lft = tmp_valid_lft; | |
832 | ift->prefered_lft = tmp_prefered_lft; | |
833 | ift->cstamp = tmp_cstamp; | |
834 | ift->tstamp = tmp_tstamp; | |
835 | spin_unlock_bh(&ift->lock); | |
836 | ||
837 | addrconf_dad_start(ift, 0); | |
838 | in6_ifa_put(ift); | |
839 | in6_dev_put(idev); | |
840 | out: | |
841 | return ret; | |
842 | } | |
843 | #endif | |
844 | ||
845 | /* | |
072047e4 | 846 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 847 | */ |
072047e4 YH |
848 | struct ipv6_saddr_score { |
849 | int addr_type; | |
850 | unsigned int attrs; | |
851 | int matchlen; | |
0d27b427 | 852 | int scope; |
072047e4 YH |
853 | unsigned int rule; |
854 | }; | |
855 | ||
856 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
857 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
858 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
859 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
860 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
861 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
862 | ||
b6f99a21 | 863 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 864 | { |
072047e4 YH |
865 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
866 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
867 | return 1; | |
868 | return 0; | |
1da177e4 LT |
869 | } |
870 | ||
072047e4 | 871 | /* static matching label */ |
b6f99a21 | 872 | static inline int ipv6_saddr_label(const struct in6_addr *addr, int type) |
072047e4 YH |
873 | { |
874 | /* | |
875 | * prefix (longest match) label | |
876 | * ----------------------------- | |
877 | * ::1/128 0 | |
878 | * ::/0 1 | |
879 | * 2002::/16 2 | |
880 | * ::/96 3 | |
881 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
882 | * fc00::/7 5 |
883 | * 2001::/32 6 | |
072047e4 YH |
884 | */ |
885 | if (type & IPV6_ADDR_LOOPBACK) | |
886 | return 0; | |
887 | else if (type & IPV6_ADDR_COMPATv4) | |
888 | return 3; | |
889 | else if (type & IPV6_ADDR_MAPPED) | |
890 | return 4; | |
102128e3 ŁS |
891 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
892 | return 6; | |
072047e4 YH |
893 | else if (addr->s6_addr16[0] == htons(0x2002)) |
894 | return 2; | |
102128e3 ŁS |
895 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
896 | return 5; | |
072047e4 YH |
897 | return 1; |
898 | } | |
1da177e4 | 899 | |
072047e4 | 900 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
901 | struct in6_addr *daddr, struct in6_addr *saddr) |
902 | { | |
072047e4 YH |
903 | struct ipv6_saddr_score hiscore; |
904 | struct inet6_ifaddr *ifa_result = NULL; | |
905 | int daddr_type = __ipv6_addr_type(daddr); | |
906 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
907 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
908 | struct net_device *dev; | |
1da177e4 | 909 | |
072047e4 | 910 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 911 | |
072047e4 | 912 | read_lock(&dev_base_lock); |
8814c4b5 | 913 | rcu_read_lock(); |
1da177e4 | 914 | |
7562f876 | 915 | for_each_netdev(dev) { |
072047e4 YH |
916 | struct inet6_dev *idev; |
917 | struct inet6_ifaddr *ifa; | |
918 | ||
919 | /* Rule 0: Candidate Source Address (section 4) | |
920 | * - multicast and link-local destination address, | |
921 | * the set of candidate source address MUST only | |
922 | * include addresses assigned to interfaces | |
923 | * belonging to the same link as the outgoing | |
924 | * interface. | |
925 | * (- For site-local destination addresses, the | |
926 | * set of candidate source addresses MUST only | |
927 | * include addresses assigned to interfaces | |
928 | * belonging to the same site as the outgoing | |
929 | * interface.) | |
930 | */ | |
931 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
932 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
933 | daddr_dev && dev != daddr_dev) | |
934 | continue; | |
1da177e4 | 935 | |
1da177e4 | 936 | idev = __in6_dev_get(dev); |
072047e4 YH |
937 | if (!idev) |
938 | continue; | |
939 | ||
940 | read_lock_bh(&idev->lock); | |
941 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
942 | struct ipv6_saddr_score score; | |
943 | ||
944 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
945 | ||
6b3ae80a YH |
946 | /* Rule 0: |
947 | * - Tentative Address (RFC2462 section 5.4) | |
948 | * - A tentative address is not considered | |
949 | * "assigned to an interface" in the traditional | |
95c385b4 | 950 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 951 | * - Candidate Source Address (section 4) |
072047e4 YH |
952 | * - In any case, anycast addresses, multicast |
953 | * addresses, and the unspecified address MUST | |
954 | * NOT be included in a candidate set. | |
955 | */ | |
95c385b4 NH |
956 | if ((ifa->flags & IFA_F_TENTATIVE) && |
957 | (!(ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 958 | continue; |
072047e4 YH |
959 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
960 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
961 | LIMIT_NETDEBUG(KERN_DEBUG | |
962 | "ADDRCONF: unspecified / multicast address" | |
963 | "assigned as unicast address on %s", | |
964 | dev->name); | |
965 | continue; | |
966 | } | |
967 | ||
968 | score.attrs = 0; | |
969 | score.matchlen = 0; | |
970 | score.scope = 0; | |
971 | score.rule = 0; | |
972 | ||
973 | if (ifa_result == NULL) { | |
974 | /* record it if the first available entry */ | |
975 | goto record_it; | |
976 | } | |
977 | ||
978 | /* Rule 1: Prefer same address */ | |
979 | if (hiscore.rule < 1) { | |
980 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
981 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
982 | hiscore.rule++; | |
983 | } | |
984 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
985 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
986 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
987 | score.rule = 1; | |
988 | goto record_it; | |
1da177e4 | 989 | } |
072047e4 YH |
990 | } else { |
991 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
992 | continue; | |
1da177e4 | 993 | } |
1da177e4 | 994 | |
072047e4 YH |
995 | /* Rule 2: Prefer appropriate scope */ |
996 | if (hiscore.rule < 2) { | |
997 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
998 | hiscore.rule++; | |
999 | } | |
1000 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1001 | if (hiscore.scope < score.scope) { | |
1002 | if (hiscore.scope < daddr_scope) { | |
1003 | score.rule = 2; | |
1004 | goto record_it; | |
1005 | } else | |
1006 | continue; | |
1007 | } else if (score.scope < hiscore.scope) { | |
1008 | if (score.scope < daddr_scope) | |
e55ffac6 | 1009 | break; /* addresses sorted by scope */ |
072047e4 YH |
1010 | else { |
1011 | score.rule = 2; | |
1012 | goto record_it; | |
1013 | } | |
1014 | } | |
1da177e4 | 1015 | |
95c385b4 | 1016 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
072047e4 YH |
1017 | if (hiscore.rule < 3) { |
1018 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
95c385b4 NH |
1019 | (((ifa_result->flags & |
1020 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) | |
072047e4 YH |
1021 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1022 | hiscore.rule++; | |
1023 | } | |
1024 | if (ipv6_saddr_preferred(score.addr_type) || | |
6ae5f983 | 1025 | (((ifa->flags & |
95c385b4 | 1026 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { |
072047e4 YH |
1027 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1028 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1029 | score.rule = 3; | |
1030 | goto record_it; | |
1031 | } | |
1032 | } else { | |
1033 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1034 | continue; | |
1035 | } | |
1da177e4 | 1036 | |
3b9f9a1c | 1037 | /* Rule 4: Prefer home address */ |
59fbb3a6 | 1038 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
1039 | if (hiscore.rule < 4) { |
1040 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1041 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1042 | hiscore.rule++; | |
1043 | } | |
1044 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1045 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1046 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1047 | score.rule = 4; | |
1048 | goto record_it; | |
1049 | } | |
1050 | } else { | |
1051 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1052 | continue; | |
1053 | } | |
1054 | #else | |
220bbd74 YH |
1055 | if (hiscore.rule < 4) |
1056 | hiscore.rule++; | |
3b9f9a1c | 1057 | #endif |
072047e4 YH |
1058 | |
1059 | /* Rule 5: Prefer outgoing interface */ | |
1060 | if (hiscore.rule < 5) { | |
1061 | if (daddr_dev == NULL || | |
1062 | daddr_dev == ifa_result->idev->dev) | |
1063 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1064 | hiscore.rule++; | |
1065 | } | |
1066 | if (daddr_dev == NULL || | |
1067 | daddr_dev == ifa->idev->dev) { | |
1068 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1069 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1070 | score.rule = 5; | |
1071 | goto record_it; | |
1072 | } | |
1073 | } else { | |
1074 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1075 | continue; | |
1076 | } | |
1077 | ||
1078 | /* Rule 6: Prefer matching label */ | |
1079 | if (hiscore.rule < 6) { | |
1080 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1081 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1082 | hiscore.rule++; | |
1083 | } | |
1084 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1085 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1086 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1087 | score.rule = 6; | |
1088 | goto record_it; | |
1da177e4 | 1089 | } |
072047e4 YH |
1090 | } else { |
1091 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1092 | continue; | |
1093 | } | |
1094 | ||
44fd0261 | 1095 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1096 | /* Rule 7: Prefer public address |
1097 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1098 | */ | |
1099 | if (hiscore.rule < 7) { | |
1100 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1101 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1102 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1103 | hiscore.rule++; | |
1104 | } | |
1105 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1106 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1107 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1108 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1109 | score.rule = 7; | |
1110 | goto record_it; | |
1111 | } | |
1112 | } else { | |
1113 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1114 | continue; | |
1115 | } | |
5e2707fa YH |
1116 | #else |
1117 | if (hiscore.rule < 7) | |
1118 | hiscore.rule++; | |
44fd0261 | 1119 | #endif |
072047e4 | 1120 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1121 | if (hiscore.rule < 8) { |
072047e4 | 1122 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1123 | hiscore.rule++; |
1124 | } | |
072047e4 YH |
1125 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1126 | if (score.matchlen > hiscore.matchlen) { | |
1127 | score.rule = 8; | |
1128 | goto record_it; | |
1da177e4 | 1129 | } |
072047e4 YH |
1130 | #if 0 |
1131 | else if (score.matchlen < hiscore.matchlen) | |
1132 | continue; | |
1133 | #endif | |
1134 | ||
1135 | /* Final Rule: choose first available one */ | |
1136 | continue; | |
1137 | record_it: | |
1138 | if (ifa_result) | |
1139 | in6_ifa_put(ifa_result); | |
1140 | in6_ifa_hold(ifa); | |
1141 | ifa_result = ifa; | |
1142 | hiscore = score; | |
1da177e4 | 1143 | } |
072047e4 | 1144 | read_unlock_bh(&idev->lock); |
1da177e4 | 1145 | } |
8814c4b5 | 1146 | rcu_read_unlock(); |
1da177e4 LT |
1147 | read_unlock(&dev_base_lock); |
1148 | ||
072047e4 YH |
1149 | if (!ifa_result) |
1150 | return -EADDRNOTAVAIL; | |
1ab1457c | 1151 | |
072047e4 YH |
1152 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1153 | in6_ifa_put(ifa_result); | |
1154 | return 0; | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | ||
1158 | int ipv6_get_saddr(struct dst_entry *dst, | |
1159 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1160 | { | |
7a3025b1 | 1161 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1162 | } |
1163 | ||
7159039a | 1164 | EXPORT_SYMBOL(ipv6_get_saddr); |
1da177e4 | 1165 | |
95c385b4 NH |
1166 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1167 | unsigned char banned_flags) | |
1da177e4 LT |
1168 | { |
1169 | struct inet6_dev *idev; | |
1170 | int err = -EADDRNOTAVAIL; | |
1171 | ||
8814c4b5 | 1172 | rcu_read_lock(); |
1da177e4 LT |
1173 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1174 | struct inet6_ifaddr *ifp; | |
1175 | ||
1176 | read_lock_bh(&idev->lock); | |
1177 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1178 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1179 | ipv6_addr_copy(addr, &ifp->addr); |
1180 | err = 0; | |
1181 | break; | |
1182 | } | |
1183 | } | |
1184 | read_unlock_bh(&idev->lock); | |
1185 | } | |
8814c4b5 | 1186 | rcu_read_unlock(); |
1da177e4 LT |
1187 | return err; |
1188 | } | |
1189 | ||
1190 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1191 | { | |
1192 | int cnt = 0; | |
1193 | struct inet6_ifaddr *ifp; | |
1194 | ||
1195 | read_lock_bh(&idev->lock); | |
1196 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1197 | cnt++; | |
1198 | read_unlock_bh(&idev->lock); | |
1199 | return cnt; | |
1200 | } | |
1201 | ||
1202 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1203 | { | |
1204 | struct inet6_ifaddr * ifp; | |
1205 | u8 hash = ipv6_addr_hash(addr); | |
1206 | ||
1207 | read_lock_bh(&addrconf_hash_lock); | |
1208 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1209 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1210 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1211 | if (dev == NULL || ifp->idev->dev == dev || | |
1212 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | read_unlock_bh(&addrconf_hash_lock); | |
1217 | return ifp != NULL; | |
1218 | } | |
1219 | ||
7159039a YH |
1220 | EXPORT_SYMBOL(ipv6_chk_addr); |
1221 | ||
1da177e4 LT |
1222 | static |
1223 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1224 | { | |
1225 | struct inet6_ifaddr * ifp; | |
1226 | u8 hash = ipv6_addr_hash(addr); | |
1227 | ||
1228 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1229 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1230 | if (dev == NULL || ifp->idev->dev == dev) | |
1231 | break; | |
1232 | } | |
1233 | } | |
1234 | return ifp != NULL; | |
1235 | } | |
1236 | ||
1237 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1238 | { | |
1239 | struct inet6_ifaddr * ifp; | |
1240 | u8 hash = ipv6_addr_hash(addr); | |
1241 | ||
1242 | read_lock_bh(&addrconf_hash_lock); | |
1243 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1244 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1245 | if (dev == NULL || ifp->idev->dev == dev || | |
1246 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1247 | in6_ifa_hold(ifp); | |
1248 | break; | |
1249 | } | |
1250 | } | |
1251 | } | |
1252 | read_unlock_bh(&addrconf_hash_lock); | |
1253 | ||
1254 | return ifp; | |
1255 | } | |
1256 | ||
1257 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1258 | { | |
1259 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1260 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1261 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1262 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1263 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1264 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1265 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1266 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1267 | ||
1268 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1269 | return 1; | |
1270 | ||
1271 | if (addr_type2 == IPV6_ADDR_ANY && | |
1272 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1273 | return 1; | |
1274 | ||
1275 | if (addr_type == IPV6_ADDR_ANY && | |
1276 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1277 | return 1; | |
1278 | ||
1279 | if (sk2_rcv_saddr6 && | |
1280 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1281 | return 1; | |
1282 | ||
1283 | if (addr_type == IPV6_ADDR_MAPPED && | |
1284 | !sk2_ipv6only && | |
1285 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1286 | return 1; | |
1287 | ||
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | /* Gets referenced address, destroys ifaddr */ | |
1292 | ||
9f5336e2 | 1293 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1294 | { |
1da177e4 LT |
1295 | if (ifp->flags&IFA_F_PERMANENT) { |
1296 | spin_lock_bh(&ifp->lock); | |
1297 | addrconf_del_timer(ifp); | |
1298 | ifp->flags |= IFA_F_TENTATIVE; | |
1299 | spin_unlock_bh(&ifp->lock); | |
1300 | in6_ifa_put(ifp); | |
1301 | #ifdef CONFIG_IPV6_PRIVACY | |
1302 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1303 | struct inet6_ifaddr *ifpub; | |
1304 | spin_lock_bh(&ifp->lock); | |
1305 | ifpub = ifp->ifpub; | |
1306 | if (ifpub) { | |
1307 | in6_ifa_hold(ifpub); | |
1308 | spin_unlock_bh(&ifp->lock); | |
1309 | ipv6_create_tempaddr(ifpub, ifp); | |
1310 | in6_ifa_put(ifpub); | |
1311 | } else { | |
1312 | spin_unlock_bh(&ifp->lock); | |
1313 | } | |
1314 | ipv6_del_addr(ifp); | |
1315 | #endif | |
1316 | } else | |
1317 | ipv6_del_addr(ifp); | |
1318 | } | |
1319 | ||
3c21edbd YH |
1320 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1321 | { | |
1322 | if (net_ratelimit()) | |
1323 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1324 | addrconf_dad_stop(ifp); | |
1325 | } | |
1da177e4 LT |
1326 | |
1327 | /* Join to solicited addr multicast group. */ | |
1328 | ||
1329 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1330 | { | |
1331 | struct in6_addr maddr; | |
1332 | ||
1333 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1334 | return; | |
1335 | ||
1336 | addrconf_addr_solict_mult(addr, &maddr); | |
1337 | ipv6_dev_mc_inc(dev, &maddr); | |
1338 | } | |
1339 | ||
1340 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1341 | { | |
1342 | struct in6_addr maddr; | |
1343 | ||
1344 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1345 | return; | |
1346 | ||
1347 | addrconf_addr_solict_mult(addr, &maddr); | |
1348 | __ipv6_dev_mc_dec(idev, &maddr); | |
1349 | } | |
1350 | ||
20380731 | 1351 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1352 | { |
1353 | struct in6_addr addr; | |
1354 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1355 | if (ipv6_addr_any(&addr)) | |
1356 | return; | |
1357 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1358 | } | |
1359 | ||
20380731 | 1360 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1361 | { |
1362 | struct in6_addr addr; | |
1363 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1364 | if (ipv6_addr_any(&addr)) | |
1365 | return; | |
1366 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1367 | } | |
1368 | ||
073a8e0e YH |
1369 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1370 | { | |
1371 | if (dev->addr_len != ETH_ALEN) | |
1372 | return -1; | |
1373 | memcpy(eui, dev->dev_addr, 3); | |
1374 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1375 | ||
1376 | /* | |
1377 | * The zSeries OSA network cards can be shared among various | |
1378 | * OS instances, but the OSA cards have only one MAC address. | |
1379 | * This leads to duplicate address conflicts in conjunction | |
1380 | * with IPv6 if more than one instance uses the same card. | |
1381 | * | |
1382 | * The driver for these cards can deliver a unique 16-bit | |
1383 | * identifier for each instance sharing the same card. It is | |
1384 | * placed instead of 0xFFFE in the interface identifier. The | |
1385 | * "u" bit of the interface identifier is not inverted in this | |
1386 | * case. Hence the resulting interface identifier has local | |
1387 | * scope according to RFC2373. | |
1388 | */ | |
1389 | if (dev->dev_id) { | |
1390 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1391 | eui[4] = dev->dev_id & 0xFF; | |
1392 | } else { | |
1393 | eui[3] = 0xFF; | |
1394 | eui[4] = 0xFE; | |
1395 | eui[0] ^= 2; | |
1396 | } | |
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1401 | { | |
1402 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1403 | if (dev->addr_len != ARCNET_ALEN) | |
1404 | return -1; | |
1405 | memset(eui, 0, 7); | |
1406 | eui[7] = *(u8*)dev->dev_addr; | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1411 | { | |
1412 | if (dev->addr_len != INFINIBAND_ALEN) | |
1413 | return -1; | |
1414 | memcpy(eui, dev->dev_addr + 12, 8); | |
1415 | eui[0] |= 2; | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1da177e4 LT |
1419 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1420 | { | |
1421 | switch (dev->type) { | |
1422 | case ARPHRD_ETHER: | |
1423 | case ARPHRD_FDDI: | |
1424 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1425 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1426 | case ARPHRD_ARCNET: |
073a8e0e | 1427 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1428 | case ARPHRD_INFINIBAND: |
073a8e0e | 1429 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1430 | } |
1431 | return -1; | |
1432 | } | |
1433 | ||
1434 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1435 | { | |
1436 | int err = -1; | |
1437 | struct inet6_ifaddr *ifp; | |
1438 | ||
1439 | read_lock_bh(&idev->lock); | |
1440 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1441 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1442 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1443 | err = 0; | |
1444 | break; | |
1445 | } | |
1446 | } | |
1447 | read_unlock_bh(&idev->lock); | |
1448 | return err; | |
1449 | } | |
1450 | ||
1451 | #ifdef CONFIG_IPV6_PRIVACY | |
1452 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1453 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1454 | { | |
1da177e4 | 1455 | regen: |
955189ef | 1456 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1457 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1458 | |
1459 | /* | |
1460 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1461 | * check if generated address is not inappropriate | |
1462 | * | |
1463 | * - Reserved subnet anycast (RFC 2526) | |
1464 | * 11111101 11....11 1xxxxxxx | |
1465 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1466 | * 00-00-5E-FE-xx-xx-xx-xx | |
1467 | * - value 0 | |
1468 | * - XXX: already assigned to an address on the device | |
1469 | */ | |
1ab1457c | 1470 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1471 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1472 | (idev->rndid[7]&0x80)) | |
1473 | goto regen; | |
1474 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1475 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1476 | goto regen; | |
1477 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1478 | goto regen; | |
1479 | } | |
1480 | ||
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | static void ipv6_regen_rndid(unsigned long data) | |
1485 | { | |
1486 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1487 | unsigned long expires; | |
1488 | ||
8814c4b5 | 1489 | rcu_read_lock_bh(); |
1da177e4 LT |
1490 | write_lock_bh(&idev->lock); |
1491 | ||
1492 | if (idev->dead) | |
1493 | goto out; | |
1494 | ||
1495 | if (__ipv6_regen_rndid(idev) < 0) | |
1496 | goto out; | |
1ab1457c | 1497 | |
1da177e4 | 1498 | expires = jiffies + |
1ab1457c | 1499 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1500 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1501 | if (time_before(expires, jiffies)) { | |
1502 | printk(KERN_WARNING | |
1503 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1504 | idev->dev->name); | |
1505 | goto out; | |
1506 | } | |
1507 | ||
1508 | if (!mod_timer(&idev->regen_timer, expires)) | |
1509 | in6_dev_hold(idev); | |
1510 | ||
1511 | out: | |
1512 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1513 | rcu_read_unlock_bh(); |
1da177e4 LT |
1514 | in6_dev_put(idev); |
1515 | } | |
1516 | ||
1517 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1518 | int ret = 0; | |
1519 | ||
1520 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1521 | ret = __ipv6_regen_rndid(idev); | |
1522 | return ret; | |
1523 | } | |
1524 | #endif | |
1525 | ||
1526 | /* | |
1527 | * Add prefix route. | |
1528 | */ | |
1529 | ||
1530 | static void | |
1531 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1532 | unsigned long expires, u32 flags) |
1da177e4 | 1533 | { |
86872cb5 TG |
1534 | struct fib6_config cfg = { |
1535 | .fc_table = RT6_TABLE_PREFIX, | |
1536 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1537 | .fc_ifindex = dev->ifindex, | |
1538 | .fc_expires = expires, | |
1539 | .fc_dst_len = plen, | |
1540 | .fc_flags = RTF_UP | flags, | |
1541 | }; | |
1da177e4 | 1542 | |
86872cb5 | 1543 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1544 | |
1545 | /* Prevent useless cloning on PtP SIT. | |
1546 | This thing is done here expecting that the whole | |
1547 | class of non-broadcast devices need not cloning. | |
1548 | */ | |
0be669bb | 1549 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1550 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1551 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1552 | #endif |
1da177e4 | 1553 | |
86872cb5 | 1554 | ip6_route_add(&cfg); |
1da177e4 LT |
1555 | } |
1556 | ||
1557 | /* Create "default" multicast route to the interface */ | |
1558 | ||
1559 | static void addrconf_add_mroute(struct net_device *dev) | |
1560 | { | |
86872cb5 TG |
1561 | struct fib6_config cfg = { |
1562 | .fc_table = RT6_TABLE_LOCAL, | |
1563 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1564 | .fc_ifindex = dev->ifindex, | |
1565 | .fc_dst_len = 8, | |
1566 | .fc_flags = RTF_UP, | |
1567 | }; | |
1568 | ||
1569 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1570 | ||
1571 | ip6_route_add(&cfg); | |
1da177e4 LT |
1572 | } |
1573 | ||
0be669bb | 1574 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1575 | static void sit_route_add(struct net_device *dev) |
1576 | { | |
86872cb5 TG |
1577 | struct fib6_config cfg = { |
1578 | .fc_table = RT6_TABLE_MAIN, | |
1579 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1580 | .fc_ifindex = dev->ifindex, | |
1581 | .fc_dst_len = 96, | |
1582 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1583 | }; | |
1da177e4 LT |
1584 | |
1585 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1586 | ip6_route_add(&cfg); |
1da177e4 | 1587 | } |
0be669bb | 1588 | #endif |
1da177e4 LT |
1589 | |
1590 | static void addrconf_add_lroute(struct net_device *dev) | |
1591 | { | |
1592 | struct in6_addr addr; | |
1593 | ||
1594 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1595 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1596 | } | |
1597 | ||
1598 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1599 | { | |
1600 | struct inet6_dev *idev; | |
1601 | ||
1602 | ASSERT_RTNL(); | |
1603 | ||
1604 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1605 | return NULL; | |
1606 | ||
1607 | /* Add default multicast route */ | |
1608 | addrconf_add_mroute(dev); | |
1609 | ||
1610 | /* Add link local route */ | |
1611 | addrconf_add_lroute(dev); | |
1612 | return idev; | |
1613 | } | |
1614 | ||
1615 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1616 | { | |
1617 | struct prefix_info *pinfo; | |
1618 | __u32 valid_lft; | |
1619 | __u32 prefered_lft; | |
1620 | int addr_type; | |
1621 | unsigned long rt_expires; | |
1622 | struct inet6_dev *in6_dev; | |
1623 | ||
1624 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1625 | |
1da177e4 LT |
1626 | if (len < sizeof(struct prefix_info)) { |
1627 | ADBG(("addrconf: prefix option too short\n")); | |
1628 | return; | |
1629 | } | |
1ab1457c | 1630 | |
1da177e4 LT |
1631 | /* |
1632 | * Validation checks ([ADDRCONF], page 19) | |
1633 | */ | |
1634 | ||
1635 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1636 | ||
1637 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1638 | return; | |
1639 | ||
1640 | valid_lft = ntohl(pinfo->valid); | |
1641 | prefered_lft = ntohl(pinfo->prefered); | |
1642 | ||
1643 | if (prefered_lft > valid_lft) { | |
1644 | if (net_ratelimit()) | |
1645 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1646 | return; | |
1647 | } | |
1648 | ||
1649 | in6_dev = in6_dev_get(dev); | |
1650 | ||
1651 | if (in6_dev == NULL) { | |
1652 | if (net_ratelimit()) | |
1653 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1654 | return; | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Two things going on here: | |
1659 | * 1) Add routes for on-link prefixes | |
1660 | * 2) Configure prefixes with the auto flag set | |
1661 | */ | |
1662 | ||
1663 | /* Avoid arithmetic overflow. Really, we could | |
1664 | save rt_expires in seconds, likely valid_lft, | |
1665 | but it would require division in fib gc, that it | |
1666 | not good. | |
1667 | */ | |
1668 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1669 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1670 | else |
3dd4bc68 YH |
1671 | rt_expires = valid_lft * HZ; |
1672 | ||
1673 | /* | |
1674 | * We convert this (in jiffies) to clock_t later. | |
1675 | * Avoid arithmetic overflow there as well. | |
1676 | * Overflow can happen only if HZ < USER_HZ. | |
1677 | */ | |
1678 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1679 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1680 | |
1681 | if (pinfo->onlink) { | |
1682 | struct rt6_info *rt; | |
1683 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1684 | ||
1685 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1686 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1687 | if (valid_lft == 0) { | |
e0a1ad73 | 1688 | ip6_del_rt(rt); |
1da177e4 LT |
1689 | rt = NULL; |
1690 | } else { | |
3dd4bc68 | 1691 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1692 | } |
1693 | } | |
1694 | } else if (valid_lft) { | |
1695 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1696 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1697 | } |
1698 | if (rt) | |
1699 | dst_release(&rt->u.dst); | |
1700 | } | |
1701 | ||
1702 | /* Try to figure out our local address for this prefix */ | |
1703 | ||
1704 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1705 | struct inet6_ifaddr * ifp; | |
1706 | struct in6_addr addr; | |
1707 | int create = 0, update_lft = 0; | |
1708 | ||
1709 | if (pinfo->prefix_len == 64) { | |
1710 | memcpy(&addr, &pinfo->prefix, 8); | |
1711 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1712 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1713 | in6_dev_put(in6_dev); | |
1714 | return; | |
1715 | } | |
1716 | goto ok; | |
1717 | } | |
1718 | if (net_ratelimit()) | |
1719 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1720 | pinfo->prefix_len); | |
1721 | in6_dev_put(in6_dev); | |
1722 | return; | |
1723 | ||
1724 | ok: | |
1725 | ||
1726 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1727 | ||
1728 | if (ifp == NULL && valid_lft) { | |
1729 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1730 | u32 addr_flags = 0; |
1731 | ||
1732 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1733 | if (in6_dev->cnf.optimistic_dad && | |
1734 | !ipv6_devconf.forwarding) | |
1735 | addr_flags = IFA_F_OPTIMISTIC; | |
1736 | #endif | |
1da177e4 LT |
1737 | |
1738 | /* Do not allow to create too much of autoconfigured | |
1739 | * addresses; this would be too easy way to crash kernel. | |
1740 | */ | |
1741 | if (!max_addresses || | |
1742 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1743 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1744 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1745 | addr_flags); | |
1da177e4 LT |
1746 | |
1747 | if (!ifp || IS_ERR(ifp)) { | |
1748 | in6_dev_put(in6_dev); | |
1749 | return; | |
1750 | } | |
1751 | ||
1752 | update_lft = create = 1; | |
1753 | ifp->cstamp = jiffies; | |
1754 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1755 | } | |
1756 | ||
1757 | if (ifp) { | |
1758 | int flags; | |
1759 | unsigned long now; | |
1760 | #ifdef CONFIG_IPV6_PRIVACY | |
1761 | struct inet6_ifaddr *ift; | |
1762 | #endif | |
1763 | u32 stored_lft; | |
1764 | ||
1765 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1766 | spin_lock(&ifp->lock); | |
1767 | now = jiffies; | |
1768 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1769 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1770 | else | |
1771 | stored_lft = 0; | |
1772 | if (!update_lft && stored_lft) { | |
1773 | if (valid_lft > MIN_VALID_LIFETIME || | |
1774 | valid_lft > stored_lft) | |
1775 | update_lft = 1; | |
1776 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1777 | /* valid_lft <= stored_lft is always true */ | |
1778 | /* XXX: IPsec */ | |
1779 | update_lft = 0; | |
1780 | } else { | |
1781 | valid_lft = MIN_VALID_LIFETIME; | |
1782 | if (valid_lft < prefered_lft) | |
1783 | prefered_lft = valid_lft; | |
1784 | update_lft = 1; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | if (update_lft) { | |
1789 | ifp->valid_lft = valid_lft; | |
1790 | ifp->prefered_lft = prefered_lft; | |
1791 | ifp->tstamp = now; | |
1792 | flags = ifp->flags; | |
1793 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1794 | spin_unlock(&ifp->lock); | |
1795 | ||
1796 | if (!(flags&IFA_F_TENTATIVE)) | |
1797 | ipv6_ifa_notify(0, ifp); | |
1798 | } else | |
1799 | spin_unlock(&ifp->lock); | |
1800 | ||
1801 | #ifdef CONFIG_IPV6_PRIVACY | |
1802 | read_lock_bh(&in6_dev->lock); | |
1803 | /* update all temporary addresses in the list */ | |
1804 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1805 | /* | |
1806 | * When adjusting the lifetimes of an existing | |
1807 | * temporary address, only lower the lifetimes. | |
1808 | * Implementations must not increase the | |
1809 | * lifetimes of an existing temporary address | |
1810 | * when processing a Prefix Information Option. | |
1811 | */ | |
1812 | spin_lock(&ift->lock); | |
1813 | flags = ift->flags; | |
1814 | if (ift->valid_lft > valid_lft && | |
1815 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1816 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1817 | if (ift->prefered_lft > prefered_lft && | |
1818 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1819 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1820 | spin_unlock(&ift->lock); | |
1821 | if (!(flags&IFA_F_TENTATIVE)) | |
1822 | ipv6_ifa_notify(0, ift); | |
1823 | } | |
1824 | ||
1825 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1826 | /* | |
1827 | * When a new public address is created as described in [ADDRCONF], | |
1828 | * also create a new temporary address. | |
1829 | */ | |
1ab1457c | 1830 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1831 | ipv6_create_tempaddr(ifp, NULL); |
1832 | } else { | |
1833 | read_unlock_bh(&in6_dev->lock); | |
1834 | } | |
1835 | #endif | |
1836 | in6_ifa_put(ifp); | |
1837 | addrconf_verify(0); | |
1838 | } | |
1839 | } | |
1840 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1841 | in6_dev_put(in6_dev); | |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * Set destination address. | |
1846 | * Special case for SIT interfaces where we create a new "virtual" | |
1847 | * device. | |
1848 | */ | |
1849 | int addrconf_set_dstaddr(void __user *arg) | |
1850 | { | |
1851 | struct in6_ifreq ireq; | |
1852 | struct net_device *dev; | |
1853 | int err = -EINVAL; | |
1854 | ||
1855 | rtnl_lock(); | |
1856 | ||
1857 | err = -EFAULT; | |
1858 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1859 | goto err_exit; | |
1860 | ||
1861 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1862 | ||
1863 | err = -ENODEV; | |
1864 | if (dev == NULL) | |
1865 | goto err_exit; | |
1866 | ||
0be669bb | 1867 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1868 | if (dev->type == ARPHRD_SIT) { |
1869 | struct ifreq ifr; | |
1870 | mm_segment_t oldfs; | |
1871 | struct ip_tunnel_parm p; | |
1872 | ||
1873 | err = -EADDRNOTAVAIL; | |
1874 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1875 | goto err_exit; | |
1876 | ||
1877 | memset(&p, 0, sizeof(p)); | |
1878 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1879 | p.iph.saddr = 0; | |
1880 | p.iph.version = 4; | |
1881 | p.iph.ihl = 5; | |
1882 | p.iph.protocol = IPPROTO_IPV6; | |
1883 | p.iph.ttl = 64; | |
1884 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1885 | ||
1886 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1887 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1888 | set_fs(oldfs); | |
1889 | ||
1890 | if (err == 0) { | |
1891 | err = -ENOBUFS; | |
1892 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1893 | goto err_exit; | |
1894 | err = dev_open(dev); | |
1895 | } | |
1896 | } | |
0be669bb | 1897 | #endif |
1da177e4 LT |
1898 | |
1899 | err_exit: | |
1900 | rtnl_unlock(); | |
1901 | return err; | |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * Manual configuration of address on an interface | |
1906 | */ | |
0778769d | 1907 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1908 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1909 | { |
1910 | struct inet6_ifaddr *ifp; | |
1911 | struct inet6_dev *idev; | |
1912 | struct net_device *dev; | |
1913 | int scope; | |
46d48046 | 1914 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1915 | |
1916 | ASSERT_RTNL(); | |
1ab1457c | 1917 | |
0778769d NT |
1918 | /* check the lifetime */ |
1919 | if (!valid_lft || prefered_lft > valid_lft) | |
1920 | return -EINVAL; | |
1921 | ||
1da177e4 LT |
1922 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1923 | return -ENODEV; | |
1ab1457c | 1924 | |
1da177e4 LT |
1925 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1926 | return -ENOBUFS; | |
1927 | ||
1928 | scope = ipv6_addr_scope(pfx); | |
1929 | ||
46d48046 | 1930 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1931 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1932 | flags = 0; |
1933 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1934 | valid_lft = 0x7FFFFFFF/HZ; |
1935 | ||
1936 | if (prefered_lft == 0) | |
1937 | ifa_flags |= IFA_F_DEPRECATED; | |
1938 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1939 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1940 | prefered_lft = 0x7FFFFFFF/HZ; | |
1941 | ||
1942 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1943 | ||
1da177e4 | 1944 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1945 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1946 | ifp->valid_lft = valid_lft; |
1947 | ifp->prefered_lft = prefered_lft; | |
1948 | ifp->tstamp = jiffies; | |
06aebfb7 | 1949 | spin_unlock_bh(&ifp->lock); |
0778769d | 1950 | |
46d48046 YH |
1951 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1952 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
1953 | /* |
1954 | * Note that section 3.1 of RFC 4429 indicates | |
1955 | * that the Optimistic flag should not be set for | |
1956 | * manually configured addresses | |
1957 | */ | |
1da177e4 LT |
1958 | addrconf_dad_start(ifp, 0); |
1959 | in6_ifa_put(ifp); | |
0778769d | 1960 | addrconf_verify(0); |
1da177e4 LT |
1961 | return 0; |
1962 | } | |
1963 | ||
1964 | return PTR_ERR(ifp); | |
1965 | } | |
1966 | ||
1967 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1968 | { | |
1969 | struct inet6_ifaddr *ifp; | |
1970 | struct inet6_dev *idev; | |
1971 | struct net_device *dev; | |
1ab1457c | 1972 | |
1da177e4 LT |
1973 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1974 | return -ENODEV; | |
1975 | ||
1976 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1977 | return -ENXIO; | |
1978 | ||
1979 | read_lock_bh(&idev->lock); | |
1980 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1981 | if (ifp->prefix_len == plen && | |
1982 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1983 | in6_ifa_hold(ifp); | |
1984 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1985 | |
1da177e4 LT |
1986 | ipv6_del_addr(ifp); |
1987 | ||
1988 | /* If the last address is deleted administratively, | |
1989 | disable IPv6 on this interface. | |
1990 | */ | |
1991 | if (idev->addr_list == NULL) | |
1992 | addrconf_ifdown(idev->dev, 1); | |
1993 | return 0; | |
1994 | } | |
1995 | } | |
1996 | read_unlock_bh(&idev->lock); | |
1997 | return -EADDRNOTAVAIL; | |
1998 | } | |
1999 | ||
2000 | ||
2001 | int addrconf_add_ifaddr(void __user *arg) | |
2002 | { | |
2003 | struct in6_ifreq ireq; | |
2004 | int err; | |
1ab1457c | 2005 | |
1da177e4 LT |
2006 | if (!capable(CAP_NET_ADMIN)) |
2007 | return -EPERM; | |
1ab1457c | 2008 | |
1da177e4 LT |
2009 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2010 | return -EFAULT; | |
2011 | ||
2012 | rtnl_lock(); | |
0778769d | 2013 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 2014 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
2015 | rtnl_unlock(); |
2016 | return err; | |
2017 | } | |
2018 | ||
2019 | int addrconf_del_ifaddr(void __user *arg) | |
2020 | { | |
2021 | struct in6_ifreq ireq; | |
2022 | int err; | |
1ab1457c | 2023 | |
1da177e4 LT |
2024 | if (!capable(CAP_NET_ADMIN)) |
2025 | return -EPERM; | |
2026 | ||
2027 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2028 | return -EFAULT; | |
2029 | ||
2030 | rtnl_lock(); | |
2031 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2032 | rtnl_unlock(); | |
2033 | return err; | |
2034 | } | |
2035 | ||
0be669bb | 2036 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2037 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2038 | { | |
2039 | struct inet6_ifaddr * ifp; | |
2040 | struct in6_addr addr; | |
2041 | struct net_device *dev; | |
2042 | int scope; | |
2043 | ||
2044 | ASSERT_RTNL(); | |
2045 | ||
2046 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2047 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2048 | ||
2049 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2050 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2051 | scope = IFA_LINK; | |
2052 | } else { | |
2053 | scope = IPV6_ADDR_COMPATv4; | |
2054 | } | |
2055 | ||
2056 | if (addr.s6_addr32[3]) { | |
2057 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2058 | if (!IS_ERR(ifp)) { | |
2059 | spin_lock_bh(&ifp->lock); | |
2060 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2061 | spin_unlock_bh(&ifp->lock); | |
2062 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2063 | in6_ifa_put(ifp); | |
2064 | } | |
2065 | return; | |
2066 | } | |
2067 | ||
7562f876 | 2068 | for_each_netdev(dev) { |
e5ed6399 | 2069 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2070 | if (in_dev && (dev->flags & IFF_UP)) { |
2071 | struct in_ifaddr * ifa; | |
2072 | ||
2073 | int flag = scope; | |
2074 | ||
2075 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2076 | int plen; | |
2077 | ||
2078 | addr.s6_addr32[3] = ifa->ifa_local; | |
2079 | ||
2080 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2081 | continue; | |
2082 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2083 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2084 | continue; | |
2085 | flag |= IFA_HOST; | |
2086 | } | |
2087 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2088 | plen = 64; | |
2089 | else | |
2090 | plen = 96; | |
2091 | ||
2092 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2093 | IFA_F_PERMANENT); | |
2094 | if (!IS_ERR(ifp)) { | |
2095 | spin_lock_bh(&ifp->lock); | |
2096 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2097 | spin_unlock_bh(&ifp->lock); | |
2098 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2099 | in6_ifa_put(ifp); | |
2100 | } | |
2101 | } | |
2102 | } | |
1ab1457c | 2103 | } |
1da177e4 | 2104 | } |
0be669bb | 2105 | #endif |
1da177e4 LT |
2106 | |
2107 | static void init_loopback(struct net_device *dev) | |
2108 | { | |
2109 | struct inet6_dev *idev; | |
2110 | struct inet6_ifaddr * ifp; | |
2111 | ||
2112 | /* ::1 */ | |
2113 | ||
2114 | ASSERT_RTNL(); | |
2115 | ||
2116 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2117 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2118 | return; | |
2119 | } | |
2120 | ||
2121 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2122 | if (!IS_ERR(ifp)) { | |
2123 | spin_lock_bh(&ifp->lock); | |
2124 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2125 | spin_unlock_bh(&ifp->lock); | |
2126 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2127 | in6_ifa_put(ifp); | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2132 | { | |
2133 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2134 | u32 addr_flags = IFA_F_PERMANENT; |
2135 | ||
2136 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2137 | if (idev->cnf.optimistic_dad && | |
2138 | !ipv6_devconf.forwarding) | |
2139 | addr_flags |= IFA_F_OPTIMISTIC; | |
2140 | #endif | |
1da177e4 | 2141 | |
95c385b4 NH |
2142 | |
2143 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2144 | if (!IS_ERR(ifp)) { |
46d48046 | 2145 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2146 | addrconf_dad_start(ifp, 0); |
2147 | in6_ifa_put(ifp); | |
2148 | } | |
2149 | } | |
2150 | ||
2151 | static void addrconf_dev_config(struct net_device *dev) | |
2152 | { | |
2153 | struct in6_addr addr; | |
2154 | struct inet6_dev * idev; | |
2155 | ||
2156 | ASSERT_RTNL(); | |
2157 | ||
74235a25 HX |
2158 | if ((dev->type != ARPHRD_ETHER) && |
2159 | (dev->type != ARPHRD_FDDI) && | |
2160 | (dev->type != ARPHRD_IEEE802_TR) && | |
2161 | (dev->type != ARPHRD_ARCNET) && | |
2162 | (dev->type != ARPHRD_INFINIBAND)) { | |
2163 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2164 | return; | |
2165 | } | |
2166 | ||
1da177e4 LT |
2167 | idev = addrconf_add_dev(dev); |
2168 | if (idev == NULL) | |
2169 | return; | |
2170 | ||
2171 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2172 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2173 | ||
2174 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2175 | addrconf_add_linklocal(idev, &addr); | |
2176 | } | |
2177 | ||
0be669bb | 2178 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2179 | static void addrconf_sit_config(struct net_device *dev) |
2180 | { | |
2181 | struct inet6_dev *idev; | |
2182 | ||
2183 | ASSERT_RTNL(); | |
2184 | ||
1ab1457c YH |
2185 | /* |
2186 | * Configure the tunnel with one of our IPv4 | |
2187 | * addresses... we should configure all of | |
1da177e4 LT |
2188 | * our v4 addrs in the tunnel |
2189 | */ | |
2190 | ||
2191 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2192 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2193 | return; | |
2194 | } | |
2195 | ||
2196 | sit_add_v4_addrs(idev); | |
2197 | ||
2198 | if (dev->flags&IFF_POINTOPOINT) { | |
2199 | addrconf_add_mroute(dev); | |
2200 | addrconf_add_lroute(dev); | |
2201 | } else | |
2202 | sit_route_add(dev); | |
2203 | } | |
0be669bb | 2204 | #endif |
1da177e4 LT |
2205 | |
2206 | static inline int | |
2207 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2208 | { | |
2209 | struct in6_addr lladdr; | |
2210 | ||
95c385b4 | 2211 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2212 | addrconf_add_linklocal(idev, &lladdr); |
2213 | return 0; | |
2214 | } | |
2215 | return -1; | |
2216 | } | |
2217 | ||
2218 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2219 | { | |
2220 | struct net_device *link_dev; | |
2221 | ||
2222 | /* first try to inherit the link-local address from the link device */ | |
2223 | if (idev->dev->iflink && | |
2224 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2225 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2226 | return; | |
2227 | } | |
2228 | /* then try to inherit it from any device */ | |
7562f876 | 2229 | for_each_netdev(link_dev) { |
1da177e4 LT |
2230 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2231 | return; | |
2232 | } | |
2233 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2238 | * DHCPv6, MLD etc. can be run over the virtual link | |
2239 | */ | |
2240 | ||
2241 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2242 | { | |
2243 | struct inet6_dev *idev; | |
2244 | ||
2245 | ASSERT_RTNL(); | |
2246 | ||
2247 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2248 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2249 | return; | |
2250 | } | |
2251 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2252 | } |
2253 | ||
1ab1457c | 2254 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2255 | void * data) |
2256 | { | |
2257 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2258 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2259 | int run_pending = 0; |
b217d616 | 2260 | int err; |
1da177e4 LT |
2261 | |
2262 | switch(event) { | |
45ba9dd2 | 2263 | case NETDEV_REGISTER: |
74235a25 | 2264 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2265 | idev = ipv6_add_dev(dev); |
2266 | if (!idev) | |
b217d616 | 2267 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2268 | } |
2269 | break; | |
1da177e4 | 2270 | case NETDEV_UP: |
3c21edbd | 2271 | case NETDEV_CHANGE: |
c2edacf8 JV |
2272 | if (dev->flags & IFF_SLAVE) |
2273 | break; | |
2274 | ||
3c21edbd YH |
2275 | if (event == NETDEV_UP) { |
2276 | if (!netif_carrier_ok(dev)) { | |
2277 | /* device is not ready yet. */ | |
2278 | printk(KERN_INFO | |
2279 | "ADDRCONF(NETDEV_UP): %s: " | |
2280 | "link is not ready\n", | |
2281 | dev->name); | |
2282 | break; | |
2283 | } | |
99081049 KS |
2284 | |
2285 | if (idev) | |
2286 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2287 | } else { |
2288 | if (!netif_carrier_ok(dev)) { | |
2289 | /* device is still not ready. */ | |
2290 | break; | |
2291 | } | |
2292 | ||
2293 | if (idev) { | |
2294 | if (idev->if_flags & IF_READY) { | |
2295 | /* device is already configured. */ | |
2296 | break; | |
2297 | } | |
2298 | idev->if_flags |= IF_READY; | |
2299 | } | |
2300 | ||
2301 | printk(KERN_INFO | |
2302 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2303 | "link becomes ready\n", | |
2304 | dev->name); | |
2305 | ||
c5e33bdd | 2306 | run_pending = 1; |
3c21edbd YH |
2307 | } |
2308 | ||
1da177e4 | 2309 | switch(dev->type) { |
0be669bb | 2310 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2311 | case ARPHRD_SIT: |
2312 | addrconf_sit_config(dev); | |
2313 | break; | |
0be669bb | 2314 | #endif |
1da177e4 LT |
2315 | case ARPHRD_TUNNEL6: |
2316 | addrconf_ip6_tnl_config(dev); | |
2317 | break; | |
2318 | case ARPHRD_LOOPBACK: | |
2319 | init_loopback(dev); | |
2320 | break; | |
2321 | ||
2322 | default: | |
2323 | addrconf_dev_config(dev); | |
2324 | break; | |
3ff50b79 | 2325 | } |
1da177e4 | 2326 | if (idev) { |
c5e33bdd YH |
2327 | if (run_pending) |
2328 | addrconf_dad_run(idev); | |
2329 | ||
1da177e4 LT |
2330 | /* If the MTU changed during the interface down, when the |
2331 | interface up, the changed MTU must be reflected in the | |
2332 | idev as well as routers. | |
2333 | */ | |
2334 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2335 | rt6_mtu_change(dev, dev->mtu); | |
2336 | idev->cnf.mtu6 = dev->mtu; | |
2337 | } | |
2338 | idev->tstamp = jiffies; | |
2339 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2340 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2341 | stop IPv6 on this interface. | |
2342 | */ | |
2343 | if (dev->mtu < IPV6_MIN_MTU) | |
2344 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2345 | } | |
2346 | break; | |
2347 | ||
2348 | case NETDEV_CHANGEMTU: | |
2349 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2350 | rt6_mtu_change(dev, dev->mtu); | |
2351 | idev->cnf.mtu6 = dev->mtu; | |
2352 | break; | |
2353 | } | |
2354 | ||
2355 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2356 | ||
2357 | case NETDEV_DOWN: | |
2358 | case NETDEV_UNREGISTER: | |
2359 | /* | |
2360 | * Remove all addresses from this interface. | |
2361 | */ | |
2362 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2363 | break; | |
3c21edbd | 2364 | |
1da177e4 | 2365 | case NETDEV_CHANGENAME: |
1da177e4 | 2366 | if (idev) { |
5632c515 SH |
2367 | snmp6_unregister_dev(idev); |
2368 | #ifdef CONFIG_SYSCTL | |
1da177e4 LT |
2369 | addrconf_sysctl_unregister(&idev->cnf); |
2370 | neigh_sysctl_unregister(idev->nd_parms); | |
2371 | neigh_sysctl_register(dev, idev->nd_parms, | |
2372 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2373 | &ndisc_ifinfo_sysctl_change, | |
2374 | NULL); | |
2375 | addrconf_sysctl_register(idev, &idev->cnf); | |
1da177e4 | 2376 | #endif |
b217d616 HX |
2377 | err = snmp6_register_dev(idev); |
2378 | if (err) | |
2379 | return notifier_from_errno(err); | |
5632c515 | 2380 | } |
1da177e4 | 2381 | break; |
3ff50b79 | 2382 | } |
1da177e4 LT |
2383 | |
2384 | return NOTIFY_OK; | |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * addrconf module should be notified of a device going up | |
2389 | */ | |
2390 | static struct notifier_block ipv6_dev_notf = { | |
2391 | .notifier_call = addrconf_notify, | |
2392 | .priority = 0 | |
2393 | }; | |
2394 | ||
2395 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2396 | { | |
2397 | struct inet6_dev *idev; | |
2398 | struct inet6_ifaddr *ifa, **bifa; | |
2399 | int i; | |
2400 | ||
2401 | ASSERT_RTNL(); | |
2402 | ||
2403 | if (dev == &loopback_dev && how == 1) | |
2404 | how = 0; | |
2405 | ||
2406 | rt6_ifdown(dev); | |
2407 | neigh_ifdown(&nd_tbl, dev); | |
2408 | ||
2409 | idev = __in6_dev_get(dev); | |
2410 | if (idev == NULL) | |
2411 | return -ENODEV; | |
2412 | ||
2413 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2414 | Do not dev_put! |
1da177e4 LT |
2415 | */ |
2416 | if (how == 1) { | |
1da177e4 | 2417 | idev->dead = 1; |
8814c4b5 YH |
2418 | |
2419 | /* protected by rtnl_lock */ | |
2420 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2421 | |
2422 | /* Step 1.5: remove snmp6 entry */ | |
2423 | snmp6_unregister_dev(idev); | |
2424 | ||
2425 | } | |
2426 | ||
2427 | /* Step 2: clear hash table */ | |
2428 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2429 | bifa = &inet6_addr_lst[i]; | |
2430 | ||
2431 | write_lock_bh(&addrconf_hash_lock); | |
2432 | while ((ifa = *bifa) != NULL) { | |
2433 | if (ifa->idev == idev) { | |
2434 | *bifa = ifa->lst_next; | |
2435 | ifa->lst_next = NULL; | |
2436 | addrconf_del_timer(ifa); | |
2437 | in6_ifa_put(ifa); | |
2438 | continue; | |
2439 | } | |
2440 | bifa = &ifa->lst_next; | |
2441 | } | |
2442 | write_unlock_bh(&addrconf_hash_lock); | |
2443 | } | |
2444 | ||
2445 | write_lock_bh(&idev->lock); | |
2446 | ||
2447 | /* Step 3: clear flags for stateless addrconf */ | |
2448 | if (how != 1) | |
3c21edbd | 2449 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2450 | |
2451 | /* Step 4: clear address list */ | |
2452 | #ifdef CONFIG_IPV6_PRIVACY | |
2453 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2454 | in6_dev_put(idev); | |
2455 | ||
2456 | /* clear tempaddr list */ | |
2457 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2458 | idev->tempaddr_list = ifa->tmp_next; | |
2459 | ifa->tmp_next = NULL; | |
2460 | ifa->dead = 1; | |
2461 | write_unlock_bh(&idev->lock); | |
2462 | spin_lock_bh(&ifa->lock); | |
2463 | ||
2464 | if (ifa->ifpub) { | |
2465 | in6_ifa_put(ifa->ifpub); | |
2466 | ifa->ifpub = NULL; | |
2467 | } | |
2468 | spin_unlock_bh(&ifa->lock); | |
2469 | in6_ifa_put(ifa); | |
2470 | write_lock_bh(&idev->lock); | |
2471 | } | |
2472 | #endif | |
2473 | while ((ifa = idev->addr_list) != NULL) { | |
2474 | idev->addr_list = ifa->if_next; | |
2475 | ifa->if_next = NULL; | |
2476 | ifa->dead = 1; | |
2477 | addrconf_del_timer(ifa); | |
2478 | write_unlock_bh(&idev->lock); | |
2479 | ||
2480 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2481 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2482 | in6_ifa_put(ifa); |
2483 | ||
2484 | write_lock_bh(&idev->lock); | |
2485 | } | |
2486 | write_unlock_bh(&idev->lock); | |
2487 | ||
2488 | /* Step 5: Discard multicast list */ | |
2489 | ||
2490 | if (how == 1) | |
2491 | ipv6_mc_destroy_dev(idev); | |
2492 | else | |
2493 | ipv6_mc_down(idev); | |
2494 | ||
2495 | /* Step 5: netlink notification of this interface */ | |
2496 | idev->tstamp = jiffies; | |
979ad663 | 2497 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2498 | |
1da177e4 LT |
2499 | /* Shot the device (if unregistered) */ |
2500 | ||
2501 | if (how == 1) { | |
2502 | #ifdef CONFIG_SYSCTL | |
2503 | addrconf_sysctl_unregister(&idev->cnf); | |
2504 | neigh_sysctl_unregister(idev->nd_parms); | |
2505 | #endif | |
2506 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2507 | neigh_ifdown(&nd_tbl, dev); | |
2508 | in6_dev_put(idev); | |
2509 | } | |
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | static void addrconf_rs_timer(unsigned long data) | |
2514 | { | |
2515 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2516 | ||
2517 | if (ifp->idev->cnf.forwarding) | |
2518 | goto out; | |
2519 | ||
2520 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2521 | /* | |
2522 | * Announcement received after solicitation | |
2523 | * was sent | |
2524 | */ | |
2525 | goto out; | |
2526 | } | |
2527 | ||
2528 | spin_lock(&ifp->lock); | |
2529 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2530 | struct in6_addr all_routers; | |
2531 | ||
2532 | /* The wait after the last probe can be shorter */ | |
2533 | addrconf_mod_timer(ifp, AC_RS, | |
2534 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2535 | ifp->idev->cnf.rtr_solicit_delay : | |
2536 | ifp->idev->cnf.rtr_solicit_interval); | |
2537 | spin_unlock(&ifp->lock); | |
2538 | ||
2539 | ipv6_addr_all_routers(&all_routers); | |
2540 | ||
2541 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2542 | } else { | |
2543 | spin_unlock(&ifp->lock); | |
2544 | /* | |
2545 | * Note: we do not support deprecated "all on-link" | |
2546 | * assumption any longer. | |
2547 | */ | |
2548 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2549 | ifp->idev->dev->name); | |
2550 | } | |
2551 | ||
2552 | out: | |
2553 | in6_ifa_put(ifp); | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * Duplicate Address Detection | |
2558 | */ | |
3c21edbd YH |
2559 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2560 | { | |
2561 | unsigned long rand_num; | |
2562 | struct inet6_dev *idev = ifp->idev; | |
2563 | ||
95c385b4 NH |
2564 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2565 | rand_num = 0; | |
2566 | else | |
2567 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2568 | ||
3c21edbd YH |
2569 | ifp->probes = idev->cnf.dad_transmits; |
2570 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2571 | } | |
2572 | ||
e431b8c0 | 2573 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2574 | { |
2575 | struct inet6_dev *idev = ifp->idev; | |
2576 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2577 | |
2578 | addrconf_join_solict(dev, &ifp->addr); | |
2579 | ||
1da177e4 | 2580 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2581 | |
2582 | read_lock_bh(&idev->lock); | |
2583 | if (ifp->dead) | |
2584 | goto out; | |
2585 | spin_lock_bh(&ifp->lock); | |
2586 | ||
2587 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2588 | !(ifp->flags&IFA_F_TENTATIVE) || |
2589 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2590 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2591 | spin_unlock_bh(&ifp->lock); |
2592 | read_unlock_bh(&idev->lock); | |
2593 | ||
2594 | addrconf_dad_completed(ifp); | |
2595 | return; | |
2596 | } | |
2597 | ||
6732bade | 2598 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2599 | spin_unlock_bh(&ifp->lock); |
6732bade | 2600 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2601 | /* |
2602 | * If the defice is not ready: | |
2603 | * - keep it tentative if it is a permanent address. | |
2604 | * - otherwise, kill it. | |
2605 | */ | |
2606 | in6_ifa_hold(ifp); | |
2607 | addrconf_dad_stop(ifp); | |
6732bade | 2608 | return; |
3c21edbd | 2609 | } |
95c385b4 NH |
2610 | |
2611 | /* | |
2612 | * Optimistic nodes can start receiving | |
2613 | * Frames right away | |
2614 | */ | |
2615 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2616 | ip6_ins_rt(ifp->rt); | |
2617 | ||
6732bade YH |
2618 | addrconf_dad_kick(ifp); |
2619 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2620 | out: |
2621 | read_unlock_bh(&idev->lock); | |
2622 | } | |
2623 | ||
2624 | static void addrconf_dad_timer(unsigned long data) | |
2625 | { | |
2626 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2627 | struct inet6_dev *idev = ifp->idev; | |
2628 | struct in6_addr unspec; | |
2629 | struct in6_addr mcaddr; | |
2630 | ||
2631 | read_lock_bh(&idev->lock); | |
2632 | if (idev->dead) { | |
2633 | read_unlock_bh(&idev->lock); | |
2634 | goto out; | |
2635 | } | |
2636 | spin_lock_bh(&ifp->lock); | |
2637 | if (ifp->probes == 0) { | |
2638 | /* | |
2639 | * DAD was successful | |
2640 | */ | |
2641 | ||
95c385b4 | 2642 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2643 | spin_unlock_bh(&ifp->lock); |
2644 | read_unlock_bh(&idev->lock); | |
2645 | ||
2646 | addrconf_dad_completed(ifp); | |
2647 | ||
2648 | goto out; | |
2649 | } | |
2650 | ||
2651 | ifp->probes--; | |
2652 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2653 | spin_unlock_bh(&ifp->lock); | |
2654 | read_unlock_bh(&idev->lock); | |
2655 | ||
2656 | /* send a neighbour solicitation for our addr */ | |
2657 | memset(&unspec, 0, sizeof(unspec)); | |
2658 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2659 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2660 | out: | |
2661 | in6_ifa_put(ifp); | |
2662 | } | |
2663 | ||
2664 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2665 | { | |
2666 | struct net_device * dev = ifp->idev->dev; | |
2667 | ||
2668 | /* | |
2669 | * Configure the address for reception. Now it is valid. | |
2670 | */ | |
2671 | ||
2672 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2673 | ||
2674 | /* If added prefix is link local and forwarding is off, | |
2675 | start sending router solicitations. | |
2676 | */ | |
2677 | ||
2678 | if (ifp->idev->cnf.forwarding == 0 && | |
2679 | ifp->idev->cnf.rtr_solicits > 0 && | |
2680 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2681 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2682 | struct in6_addr all_routers; | |
2683 | ||
2684 | ipv6_addr_all_routers(&all_routers); | |
2685 | ||
2686 | /* | |
2687 | * If a host as already performed a random delay | |
2688 | * [...] as part of DAD [...] there is no need | |
2689 | * to delay again before sending the first RS | |
2690 | */ | |
2691 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2692 | ||
2693 | spin_lock_bh(&ifp->lock); | |
2694 | ifp->probes = 1; | |
2695 | ifp->idev->if_flags |= IF_RS_SENT; | |
2696 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2697 | spin_unlock_bh(&ifp->lock); | |
2698 | } | |
2699 | } | |
2700 | ||
c5e33bdd YH |
2701 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2702 | struct inet6_ifaddr *ifp; | |
2703 | ||
2704 | read_lock_bh(&idev->lock); | |
2705 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2706 | spin_lock_bh(&ifp->lock); | |
2707 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2708 | spin_unlock_bh(&ifp->lock); | |
2709 | continue; | |
2710 | } | |
2711 | spin_unlock_bh(&ifp->lock); | |
2712 | addrconf_dad_kick(ifp); | |
2713 | } | |
2714 | read_unlock_bh(&idev->lock); | |
2715 | } | |
2716 | ||
1da177e4 LT |
2717 | #ifdef CONFIG_PROC_FS |
2718 | struct if6_iter_state { | |
2719 | int bucket; | |
2720 | }; | |
2721 | ||
2722 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2723 | { | |
2724 | struct inet6_ifaddr *ifa = NULL; | |
2725 | struct if6_iter_state *state = seq->private; | |
2726 | ||
2727 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2728 | ifa = inet6_addr_lst[state->bucket]; | |
2729 | if (ifa) | |
2730 | break; | |
2731 | } | |
2732 | return ifa; | |
2733 | } | |
2734 | ||
2735 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2736 | { | |
2737 | struct if6_iter_state *state = seq->private; | |
2738 | ||
2739 | ifa = ifa->lst_next; | |
2740 | try_again: | |
2741 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2742 | ifa = inet6_addr_lst[state->bucket]; | |
2743 | goto try_again; | |
2744 | } | |
2745 | return ifa; | |
2746 | } | |
2747 | ||
2748 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2749 | { | |
2750 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2751 | ||
2752 | if (ifa) | |
2753 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2754 | --pos; | |
2755 | return pos ? NULL : ifa; | |
2756 | } | |
2757 | ||
2758 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2759 | { | |
2760 | read_lock_bh(&addrconf_hash_lock); | |
2761 | return if6_get_idx(seq, *pos); | |
2762 | } | |
2763 | ||
2764 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2765 | { | |
2766 | struct inet6_ifaddr *ifa; | |
2767 | ||
2768 | ifa = if6_get_next(seq, v); | |
2769 | ++*pos; | |
2770 | return ifa; | |
2771 | } | |
2772 | ||
2773 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2774 | { | |
2775 | read_unlock_bh(&addrconf_hash_lock); | |
2776 | } | |
2777 | ||
2778 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2779 | { | |
2780 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2781 | seq_printf(seq, | |
9343e79a | 2782 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2783 | NIP6(ifp->addr), |
2784 | ifp->idev->dev->ifindex, | |
2785 | ifp->prefix_len, | |
2786 | ifp->scope, | |
2787 | ifp->flags, | |
2788 | ifp->idev->dev->name); | |
2789 | return 0; | |
2790 | } | |
2791 | ||
56b3d975 | 2792 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2793 | .start = if6_seq_start, |
2794 | .next = if6_seq_next, | |
2795 | .show = if6_seq_show, | |
2796 | .stop = if6_seq_stop, | |
2797 | }; | |
2798 | ||
2799 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2800 | { | |
2801 | struct seq_file *seq; | |
2802 | int rc = -ENOMEM; | |
322f74a4 | 2803 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2804 | |
2805 | if (!s) | |
2806 | goto out; | |
1da177e4 LT |
2807 | |
2808 | rc = seq_open(file, &if6_seq_ops); | |
2809 | if (rc) | |
2810 | goto out_kfree; | |
2811 | ||
2812 | seq = file->private_data; | |
2813 | seq->private = s; | |
2814 | out: | |
2815 | return rc; | |
2816 | out_kfree: | |
2817 | kfree(s); | |
2818 | goto out; | |
2819 | } | |
2820 | ||
9a32144e | 2821 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2822 | .owner = THIS_MODULE, |
2823 | .open = if6_seq_open, | |
2824 | .read = seq_read, | |
2825 | .llseek = seq_lseek, | |
2826 | .release = seq_release_private, | |
2827 | }; | |
2828 | ||
2829 | int __init if6_proc_init(void) | |
2830 | { | |
457c4cbc | 2831 | if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
2832 | return -ENOMEM; |
2833 | return 0; | |
2834 | } | |
2835 | ||
2836 | void if6_proc_exit(void) | |
2837 | { | |
457c4cbc | 2838 | proc_net_remove(&init_net, "if_inet6"); |
1da177e4 LT |
2839 | } |
2840 | #endif /* CONFIG_PROC_FS */ | |
2841 | ||
59fbb3a6 | 2842 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
2843 | /* Check if address is a home address configured on any interface. */ |
2844 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2845 | { | |
2846 | int ret = 0; | |
2847 | struct inet6_ifaddr * ifp; | |
2848 | u8 hash = ipv6_addr_hash(addr); | |
2849 | read_lock_bh(&addrconf_hash_lock); | |
2850 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2851 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2852 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2853 | ret = 1; | |
2854 | break; | |
2855 | } | |
2856 | } | |
2857 | read_unlock_bh(&addrconf_hash_lock); | |
2858 | return ret; | |
2859 | } | |
2860 | #endif | |
2861 | ||
1da177e4 LT |
2862 | /* |
2863 | * Periodic address status verification | |
2864 | */ | |
2865 | ||
2866 | static void addrconf_verify(unsigned long foo) | |
2867 | { | |
2868 | struct inet6_ifaddr *ifp; | |
2869 | unsigned long now, next; | |
2870 | int i; | |
2871 | ||
2872 | spin_lock_bh(&addrconf_verify_lock); | |
2873 | now = jiffies; | |
2874 | next = now + ADDR_CHECK_FREQUENCY; | |
2875 | ||
2876 | del_timer(&addr_chk_timer); | |
2877 | ||
2878 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2879 | ||
2880 | restart: | |
5d5780df | 2881 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2882 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2883 | unsigned long age; | |
2884 | #ifdef CONFIG_IPV6_PRIVACY | |
2885 | unsigned long regen_advance; | |
2886 | #endif | |
2887 | ||
2888 | if (ifp->flags & IFA_F_PERMANENT) | |
2889 | continue; | |
2890 | ||
2891 | spin_lock(&ifp->lock); | |
2892 | age = (now - ifp->tstamp) / HZ; | |
2893 | ||
2894 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2895 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2896 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2897 | ifp->idev->nd_parms->retrans_time / HZ; |
2898 | #endif | |
2899 | ||
8f27ebb9 YH |
2900 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2901 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2902 | spin_unlock(&ifp->lock); |
2903 | in6_ifa_hold(ifp); | |
5d5780df | 2904 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2905 | ipv6_del_addr(ifp); |
2906 | goto restart; | |
8f27ebb9 YH |
2907 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2908 | spin_unlock(&ifp->lock); | |
2909 | continue; | |
1da177e4 LT |
2910 | } else if (age >= ifp->prefered_lft) { |
2911 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2912 | int deprecate = 0; | |
2913 | ||
2914 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2915 | deprecate = 1; | |
2916 | ifp->flags |= IFA_F_DEPRECATED; | |
2917 | } | |
2918 | ||
2919 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2920 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2921 | ||
2922 | spin_unlock(&ifp->lock); | |
2923 | ||
2924 | if (deprecate) { | |
2925 | in6_ifa_hold(ifp); | |
5d5780df | 2926 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2927 | |
2928 | ipv6_ifa_notify(0, ifp); | |
2929 | in6_ifa_put(ifp); | |
2930 | goto restart; | |
2931 | } | |
2932 | #ifdef CONFIG_IPV6_PRIVACY | |
2933 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2934 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2935 | if (age >= ifp->prefered_lft - regen_advance) { | |
2936 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2937 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2938 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2939 | if (!ifp->regen_count && ifpub) { | |
2940 | ifp->regen_count++; | |
2941 | in6_ifa_hold(ifp); | |
2942 | in6_ifa_hold(ifpub); | |
2943 | spin_unlock(&ifp->lock); | |
5d5780df | 2944 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2945 | spin_lock(&ifpub->lock); |
2946 | ifpub->regen_count = 0; | |
2947 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2948 | ipv6_create_tempaddr(ifpub, ifp); |
2949 | in6_ifa_put(ifpub); | |
2950 | in6_ifa_put(ifp); | |
2951 | goto restart; | |
2952 | } | |
2953 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2954 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2955 | spin_unlock(&ifp->lock); | |
2956 | #endif | |
2957 | } else { | |
2958 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2959 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2960 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2961 | spin_unlock(&ifp->lock); | |
2962 | } | |
2963 | } | |
5d5780df | 2964 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2965 | } |
2966 | ||
2967 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2968 | add_timer(&addr_chk_timer); | |
2969 | spin_unlock_bh(&addrconf_verify_lock); | |
2970 | } | |
2971 | ||
461d8837 TG |
2972 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2973 | { | |
2974 | struct in6_addr *pfx = NULL; | |
2975 | ||
2976 | if (addr) | |
2977 | pfx = nla_data(addr); | |
2978 | ||
2979 | if (local) { | |
2980 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2981 | pfx = NULL; | |
2982 | else | |
2983 | pfx = nla_data(local); | |
2984 | } | |
2985 | ||
2986 | return pfx; | |
2987 | } | |
2988 | ||
ef7c79ed | 2989 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
2990 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
2991 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2992 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2993 | }; | |
2994 | ||
1da177e4 LT |
2995 | static int |
2996 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2997 | { | |
b933f716 TG |
2998 | struct ifaddrmsg *ifm; |
2999 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3000 | struct in6_addr *pfx; |
b933f716 | 3001 | int err; |
1da177e4 | 3002 | |
b933f716 TG |
3003 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3004 | if (err < 0) | |
3005 | return err; | |
3006 | ||
3007 | ifm = nlmsg_data(nlh); | |
3008 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3009 | if (pfx == NULL) |
3010 | return -EINVAL; | |
3011 | ||
3012 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
3013 | } | |
3014 | ||
55ebaef1 NT |
3015 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3016 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3017 | { |
46d48046 YH |
3018 | u32 flags = RTF_EXPIRES; |
3019 | ||
081bba5b NT |
3020 | if (!valid_lft || (prefered_lft > valid_lft)) |
3021 | return -EINVAL; | |
3022 | ||
46d48046 | 3023 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 3024 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
3025 | flags = 0; |
3026 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
3027 | valid_lft = 0x7FFFFFFF/HZ; |
3028 | ||
3029 | if (prefered_lft == 0) | |
55ebaef1 | 3030 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
3031 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
3032 | (prefered_lft != INFINITY_LIFE_TIME)) | |
3033 | prefered_lft = 0x7FFFFFFF/HZ; | |
3034 | ||
3035 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3036 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3037 | ifp->tstamp = jiffies; |
3038 | ifp->valid_lft = valid_lft; | |
3039 | ifp->prefered_lft = prefered_lft; | |
3040 | ||
3041 | spin_unlock_bh(&ifp->lock); | |
3042 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3043 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3044 | |
46d48046 YH |
3045 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3046 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3047 | addrconf_verify(0); |
3048 | ||
3049 | return 0; | |
3050 | } | |
3051 | ||
1da177e4 LT |
3052 | static int |
3053 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3054 | { | |
461d8837 TG |
3055 | struct ifaddrmsg *ifm; |
3056 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3057 | struct in6_addr *pfx; |
7198f8ce TG |
3058 | struct inet6_ifaddr *ifa; |
3059 | struct net_device *dev; | |
55ebaef1 NT |
3060 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3061 | u8 ifa_flags; | |
461d8837 | 3062 | int err; |
1da177e4 | 3063 | |
461d8837 TG |
3064 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3065 | if (err < 0) | |
3066 | return err; | |
3067 | ||
3068 | ifm = nlmsg_data(nlh); | |
3069 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3070 | if (pfx == NULL) |
3071 | return -EINVAL; | |
3072 | ||
461d8837 | 3073 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3074 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3075 | |
3076 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3077 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3078 | preferred_lft = ci->ifa_prefered; |
3079 | } else { | |
3080 | preferred_lft = INFINITY_LIFE_TIME; | |
3081 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3082 | } |
3083 | ||
7198f8ce TG |
3084 | dev = __dev_get_by_index(ifm->ifa_index); |
3085 | if (dev == NULL) | |
3086 | return -ENODEV; | |
3087 | ||
55ebaef1 | 3088 | /* We ignore other flags so far. */ |
3b9f9a1c | 3089 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3090 | |
7198f8ce TG |
3091 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3092 | if (ifa == NULL) { | |
3093 | /* | |
3094 | * It would be best to check for !NLM_F_CREATE here but | |
3095 | * userspace alreay relies on not having to provide this. | |
3096 | */ | |
3097 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3098 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3099 | } |
3100 | ||
7198f8ce TG |
3101 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3102 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3103 | err = -EEXIST; | |
3104 | else | |
55ebaef1 | 3105 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3106 | |
3107 | in6_ifa_put(ifa); | |
3108 | ||
3109 | return err; | |
1da177e4 LT |
3110 | } |
3111 | ||
101bb229 TG |
3112 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3113 | u8 scope, int ifindex) | |
3114 | { | |
3115 | struct ifaddrmsg *ifm; | |
3116 | ||
3117 | ifm = nlmsg_data(nlh); | |
3118 | ifm->ifa_family = AF_INET6; | |
3119 | ifm->ifa_prefixlen = prefixlen; | |
3120 | ifm->ifa_flags = flags; | |
3121 | ifm->ifa_scope = scope; | |
3122 | ifm->ifa_index = ifindex; | |
3123 | } | |
3124 | ||
85486af0 TG |
3125 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3126 | unsigned long tstamp, u32 preferred, u32 valid) | |
3127 | { | |
3128 | struct ifa_cacheinfo ci; | |
3129 | ||
3130 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3131 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3132 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3133 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3134 | ci.ifa_prefered = preferred; | |
3135 | ci.ifa_valid = valid; | |
3136 | ||
3137 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3138 | } | |
3139 | ||
101bb229 TG |
3140 | static inline int rt_scope(int ifa_scope) |
3141 | { | |
3142 | if (ifa_scope & IFA_HOST) | |
3143 | return RT_SCOPE_HOST; | |
3144 | else if (ifa_scope & IFA_LINK) | |
3145 | return RT_SCOPE_LINK; | |
3146 | else if (ifa_scope & IFA_SITE) | |
3147 | return RT_SCOPE_SITE; | |
3148 | else | |
3149 | return RT_SCOPE_UNIVERSE; | |
3150 | } | |
3151 | ||
0ab6803b TG |
3152 | static inline int inet6_ifaddr_msgsize(void) |
3153 | { | |
339bf98f TG |
3154 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3155 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3156 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3157 | } |
c5396a31 | 3158 | |
1da177e4 | 3159 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3160 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3161 | { |
1da177e4 | 3162 | struct nlmsghdr *nlh; |
85486af0 | 3163 | u32 preferred, valid; |
1da177e4 | 3164 | |
0ab6803b TG |
3165 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3166 | if (nlh == NULL) | |
26932566 | 3167 | return -EMSGSIZE; |
0ab6803b | 3168 | |
101bb229 TG |
3169 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3170 | ifa->idev->dev->ifindex); | |
3171 | ||
1da177e4 | 3172 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3173 | preferred = ifa->prefered_lft; |
3174 | valid = ifa->valid_lft; | |
3175 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3176 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3177 | preferred -= tval; |
3178 | if (valid != INFINITY_LIFE_TIME) | |
3179 | valid -= tval; | |
1da177e4 LT |
3180 | } |
3181 | } else { | |
85486af0 TG |
3182 | preferred = INFINITY_LIFE_TIME; |
3183 | valid = INFINITY_LIFE_TIME; | |
3184 | } | |
3185 | ||
0ab6803b | 3186 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3187 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3188 | nlmsg_cancel(skb, nlh); | |
3189 | return -EMSGSIZE; | |
3190 | } | |
1da177e4 | 3191 | |
0ab6803b | 3192 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3193 | } |
3194 | ||
3195 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3196 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3197 | { |
1da177e4 | 3198 | struct nlmsghdr *nlh; |
101bb229 TG |
3199 | u8 scope = RT_SCOPE_UNIVERSE; |
3200 | int ifindex = ifmca->idev->dev->ifindex; | |
3201 | ||
3202 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3203 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3204 | |
0ab6803b TG |
3205 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3206 | if (nlh == NULL) | |
26932566 | 3207 | return -EMSGSIZE; |
85486af0 | 3208 | |
0ab6803b TG |
3209 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3210 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3211 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3212 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3213 | nlmsg_cancel(skb, nlh); | |
3214 | return -EMSGSIZE; | |
3215 | } | |
85486af0 | 3216 | |
0ab6803b | 3217 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3218 | } |
3219 | ||
3220 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3221 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3222 | { |
1da177e4 | 3223 | struct nlmsghdr *nlh; |
101bb229 TG |
3224 | u8 scope = RT_SCOPE_UNIVERSE; |
3225 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3226 | ||
3227 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3228 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3229 | |
0ab6803b TG |
3230 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3231 | if (nlh == NULL) | |
26932566 | 3232 | return -EMSGSIZE; |
85486af0 | 3233 | |
0ab6803b TG |
3234 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3235 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3236 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3237 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3238 | nlmsg_cancel(skb, nlh); | |
3239 | return -EMSGSIZE; | |
3240 | } | |
1da177e4 | 3241 | |
0ab6803b | 3242 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3243 | } |
3244 | ||
3245 | enum addr_type_t | |
3246 | { | |
3247 | UNICAST_ADDR, | |
3248 | MULTICAST_ADDR, | |
3249 | ANYCAST_ADDR, | |
3250 | }; | |
3251 | ||
3252 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3253 | enum addr_type_t type) | |
3254 | { | |
3255 | int idx, ip_idx; | |
3256 | int s_idx, s_ip_idx; | |
3257 | int err = 1; | |
3258 | struct net_device *dev; | |
3259 | struct inet6_dev *idev = NULL; | |
3260 | struct inet6_ifaddr *ifa; | |
3261 | struct ifmcaddr6 *ifmca; | |
3262 | struct ifacaddr6 *ifaca; | |
3263 | ||
3264 | s_idx = cb->args[0]; | |
3265 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3266 | |
7562f876 PE |
3267 | idx = 0; |
3268 | for_each_netdev(dev) { | |
1da177e4 | 3269 | if (idx < s_idx) |
7562f876 | 3270 | goto cont; |
1da177e4 LT |
3271 | if (idx > s_idx) |
3272 | s_ip_idx = 0; | |
3273 | ip_idx = 0; | |
3274 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3275 | goto cont; |
1da177e4 LT |
3276 | read_lock_bh(&idev->lock); |
3277 | switch (type) { | |
3278 | case UNICAST_ADDR: | |
ae9cda5d | 3279 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3280 | for (ifa = idev->addr_list; ifa; |
3281 | ifa = ifa->if_next, ip_idx++) { | |
3282 | if (ip_idx < s_ip_idx) | |
3283 | continue; | |
1ab1457c YH |
3284 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3285 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3286 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3287 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3288 | goto done; |
3289 | } | |
1da177e4 LT |
3290 | break; |
3291 | case MULTICAST_ADDR: | |
3292 | /* multicast address */ | |
1ab1457c | 3293 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3294 | ifmca = ifmca->next, ip_idx++) { |
3295 | if (ip_idx < s_ip_idx) | |
3296 | continue; | |
1ab1457c YH |
3297 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3298 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3299 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3300 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3301 | goto done; |
3302 | } | |
3303 | break; | |
3304 | case ANYCAST_ADDR: | |
3305 | /* anycast address */ | |
3306 | for (ifaca = idev->ac_list; ifaca; | |
3307 | ifaca = ifaca->aca_next, ip_idx++) { | |
3308 | if (ip_idx < s_ip_idx) | |
3309 | continue; | |
1ab1457c YH |
3310 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3311 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3312 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3313 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3314 | goto done; |
3315 | } | |
3316 | break; | |
3317 | default: | |
3318 | break; | |
3319 | } | |
3320 | read_unlock_bh(&idev->lock); | |
3321 | in6_dev_put(idev); | |
7562f876 PE |
3322 | cont: |
3323 | idx++; | |
1da177e4 LT |
3324 | } |
3325 | done: | |
3326 | if (err <= 0) { | |
3327 | read_unlock_bh(&idev->lock); | |
3328 | in6_dev_put(idev); | |
3329 | } | |
1da177e4 LT |
3330 | cb->args[0] = idx; |
3331 | cb->args[1] = ip_idx; | |
3332 | return skb->len; | |
3333 | } | |
3334 | ||
3335 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3336 | { | |
3337 | enum addr_type_t type = UNICAST_ADDR; | |
3338 | return inet6_dump_addr(skb, cb, type); | |
3339 | } | |
3340 | ||
3341 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3342 | { | |
3343 | enum addr_type_t type = MULTICAST_ADDR; | |
3344 | return inet6_dump_addr(skb, cb, type); | |
3345 | } | |
3346 | ||
3347 | ||
3348 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3349 | { | |
3350 | enum addr_type_t type = ANYCAST_ADDR; | |
3351 | return inet6_dump_addr(skb, cb, type); | |
3352 | } | |
3353 | ||
1b29fc2c TG |
3354 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3355 | void *arg) | |
6c223828 | 3356 | { |
1b29fc2c TG |
3357 | struct ifaddrmsg *ifm; |
3358 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3359 | struct in6_addr *addr = NULL; |
3360 | struct net_device *dev = NULL; | |
3361 | struct inet6_ifaddr *ifa; | |
3362 | struct sk_buff *skb; | |
6c223828 NT |
3363 | int err; |
3364 | ||
1b29fc2c TG |
3365 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3366 | if (err < 0) | |
3367 | goto errout; | |
3368 | ||
3369 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3370 | if (addr == NULL) { | |
3371 | err = -EINVAL; | |
3372 | goto errout; | |
6c223828 | 3373 | } |
6c223828 | 3374 | |
1b29fc2c | 3375 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3376 | if (ifm->ifa_index) |
3377 | dev = __dev_get_by_index(ifm->ifa_index); | |
3378 | ||
1b29fc2c TG |
3379 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3380 | err = -EADDRNOTAVAIL; | |
3381 | goto errout; | |
3382 | } | |
6c223828 | 3383 | |
0ab6803b | 3384 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3385 | err = -ENOBUFS; |
1b29fc2c | 3386 | goto errout_ifa; |
6c223828 NT |
3387 | } |
3388 | ||
6c223828 NT |
3389 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3390 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3391 | if (err < 0) { |
3392 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3393 | WARN_ON(err == -EMSGSIZE); | |
3394 | kfree_skb(skb); | |
3395 | goto errout_ifa; | |
3396 | } | |
2942e900 | 3397 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3398 | errout_ifa: |
6c223828 | 3399 | in6_ifa_put(ifa); |
1b29fc2c | 3400 | errout: |
6c223828 | 3401 | return err; |
6c223828 NT |
3402 | } |
3403 | ||
1da177e4 LT |
3404 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3405 | { | |
3406 | struct sk_buff *skb; | |
5d620266 | 3407 | int err = -ENOBUFS; |
1da177e4 | 3408 | |
0ab6803b | 3409 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3410 | if (skb == NULL) |
3411 | goto errout; | |
3412 | ||
3413 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3414 | if (err < 0) { |
3415 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3416 | WARN_ON(err == -EMSGSIZE); | |
3417 | kfree_skb(skb); | |
3418 | goto errout; | |
3419 | } | |
5d620266 TG |
3420 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3421 | errout: | |
3422 | if (err < 0) | |
3423 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3424 | } |
3425 | ||
b6f99a21 | 3426 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3427 | __s32 *array, int bytes) |
3428 | { | |
04561c1f TG |
3429 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3430 | ||
1da177e4 LT |
3431 | memset(array, 0, bytes); |
3432 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3433 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3434 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3435 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3436 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3437 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3438 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3439 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3440 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3441 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3442 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3443 | #ifdef CONFIG_IPV6_PRIVACY | |
3444 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3445 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3446 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3447 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3448 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3449 | #endif | |
3450 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3451 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3452 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3453 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3454 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3455 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3456 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3457 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3458 | #endif | |
930d6ff2 | 3459 | #endif |
fbea49e1 | 3460 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3461 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3462 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3463 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3464 | #endif | |
1da177e4 LT |
3465 | } |
3466 | ||
339bf98f TG |
3467 | static inline size_t inet6_if_nlmsg_size(void) |
3468 | { | |
3469 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3470 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3471 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3472 | + nla_total_size(4) /* IFLA_MTU */ | |
3473 | + nla_total_size(4) /* IFLA_LINK */ | |
3474 | + nla_total_size( /* IFLA_PROTINFO */ | |
3475 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3476 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3477 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3478 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3479 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3480 | ); |
3481 | } | |
c5396a31 | 3482 | |
7f7d9a6b HX |
3483 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3484 | int bytes) | |
3485 | { | |
3486 | int i; | |
3487 | int pad = bytes - sizeof(u64) * items; | |
3488 | BUG_ON(pad < 0); | |
3489 | ||
3490 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3491 | put_unaligned(items, &stats[0]); | |
3492 | for (i = 1; i < items; i++) | |
3493 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3494 | ||
3495 | memset(&stats[items], 0, pad); | |
3496 | } | |
3497 | ||
3498 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3499 | int bytes) | |
3500 | { | |
3501 | switch(attrtype) { | |
3502 | case IFLA_INET6_STATS: | |
3503 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3504 | break; | |
3505 | case IFLA_INET6_ICMP6STATS: | |
3506 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3507 | break; | |
3508 | } | |
3509 | } | |
3510 | ||
1ab1457c | 3511 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3512 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3513 | { |
04561c1f | 3514 | struct net_device *dev = idev->dev; |
bf99f1bd | 3515 | struct nlattr *nla; |
04561c1f TG |
3516 | struct ifinfomsg *hdr; |
3517 | struct nlmsghdr *nlh; | |
3518 | void *protoinfo; | |
3519 | struct ifla_cacheinfo ci; | |
3520 | ||
3521 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3522 | if (nlh == NULL) | |
26932566 | 3523 | return -EMSGSIZE; |
04561c1f TG |
3524 | |
3525 | hdr = nlmsg_data(nlh); | |
3526 | hdr->ifi_family = AF_INET6; | |
3527 | hdr->__ifi_pad = 0; | |
3528 | hdr->ifi_type = dev->type; | |
3529 | hdr->ifi_index = dev->ifindex; | |
3530 | hdr->ifi_flags = dev_get_flags(dev); | |
3531 | hdr->ifi_change = 0; | |
3532 | ||
3533 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3534 | |
3535 | if (dev->addr_len) | |
04561c1f | 3536 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3537 | |
04561c1f | 3538 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3539 | if (dev->ifindex != dev->iflink) |
04561c1f | 3540 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3541 | |
04561c1f TG |
3542 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3543 | if (protoinfo == NULL) | |
3544 | goto nla_put_failure; | |
1da177e4 | 3545 | |
04561c1f | 3546 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3547 | |
1da177e4 LT |
3548 | ci.max_reasm_len = IPV6_MAXPLEN; |
3549 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3550 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3551 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3552 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3553 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3554 | ||
bf99f1bd YH |
3555 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3556 | if (nla == NULL) | |
04561c1f | 3557 | goto nla_put_failure; |
bf99f1bd | 3558 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3559 | |
bf99f1bd YH |
3560 | /* XXX - MC not implemented */ |
3561 | ||
3562 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3563 | if (nla == NULL) | |
3564 | goto nla_put_failure; | |
3565 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3566 | ||
3567 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3568 | if (nla == NULL) | |
3569 | goto nla_put_failure; | |
3570 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3571 | |
04561c1f TG |
3572 | nla_nest_end(skb, protoinfo); |
3573 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3574 | |
04561c1f | 3575 | nla_put_failure: |
26932566 PM |
3576 | nlmsg_cancel(skb, nlh); |
3577 | return -EMSGSIZE; | |
1da177e4 LT |
3578 | } |
3579 | ||
3580 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3581 | { | |
3582 | int idx, err; | |
3583 | int s_idx = cb->args[0]; | |
3584 | struct net_device *dev; | |
3585 | struct inet6_dev *idev; | |
3586 | ||
3587 | read_lock(&dev_base_lock); | |
7562f876 PE |
3588 | idx = 0; |
3589 | for_each_netdev(dev) { | |
1da177e4 | 3590 | if (idx < s_idx) |
7562f876 | 3591 | goto cont; |
1da177e4 | 3592 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3593 | goto cont; |
1ab1457c | 3594 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3595 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3596 | in6_dev_put(idev); |
3597 | if (err <= 0) | |
3598 | break; | |
7562f876 PE |
3599 | cont: |
3600 | idx++; | |
1da177e4 LT |
3601 | } |
3602 | read_unlock(&dev_base_lock); | |
3603 | cb->args[0] = idx; | |
3604 | ||
3605 | return skb->len; | |
3606 | } | |
3607 | ||
3608 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3609 | { | |
3610 | struct sk_buff *skb; | |
8d7a76c9 | 3611 | int err = -ENOBUFS; |
1ab1457c | 3612 | |
339bf98f | 3613 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3614 | if (skb == NULL) |
3615 | goto errout; | |
3616 | ||
3617 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3618 | if (err < 0) { |
3619 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3620 | WARN_ON(err == -EMSGSIZE); | |
3621 | kfree_skb(skb); | |
3622 | goto errout; | |
3623 | } | |
8d7a76c9 TG |
3624 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3625 | errout: | |
3626 | if (err < 0) | |
3627 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3628 | } |
3629 | ||
339bf98f TG |
3630 | static inline size_t inet6_prefix_nlmsg_size(void) |
3631 | { | |
3632 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3633 | + nla_total_size(sizeof(struct in6_addr)) | |
3634 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3635 | } | |
c5396a31 | 3636 | |
1da177e4 | 3637 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3638 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3639 | int event, unsigned int flags) | |
1da177e4 | 3640 | { |
6051e2f4 TG |
3641 | struct prefixmsg *pmsg; |
3642 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3643 | struct prefix_cacheinfo ci; |
3644 | ||
6051e2f4 TG |
3645 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3646 | if (nlh == NULL) | |
26932566 | 3647 | return -EMSGSIZE; |
6051e2f4 TG |
3648 | |
3649 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3650 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3651 | pmsg->prefix_pad1 = 0; |
3652 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3653 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3654 | pmsg->prefix_len = pinfo->prefix_len; | |
3655 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3656 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3657 | pmsg->prefix_flags = 0; |
3658 | if (pinfo->onlink) | |
3659 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3660 | if (pinfo->autoconf) | |
3661 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3662 | ||
6051e2f4 | 3663 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3664 | |
3665 | ci.preferred_time = ntohl(pinfo->prefered); | |
3666 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3667 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3668 | |
6051e2f4 | 3669 | return nlmsg_end(skb, nlh); |
1da177e4 | 3670 | |
6051e2f4 | 3671 | nla_put_failure: |
26932566 PM |
3672 | nlmsg_cancel(skb, nlh); |
3673 | return -EMSGSIZE; | |
1da177e4 LT |
3674 | } |
3675 | ||
1ab1457c | 3676 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3677 | struct prefix_info *pinfo) |
3678 | { | |
3679 | struct sk_buff *skb; | |
8c384bfa | 3680 | int err = -ENOBUFS; |
1da177e4 | 3681 | |
339bf98f | 3682 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3683 | if (skb == NULL) |
3684 | goto errout; | |
3685 | ||
3686 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3687 | if (err < 0) { |
3688 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3689 | WARN_ON(err == -EMSGSIZE); | |
3690 | kfree_skb(skb); | |
3691 | goto errout; | |
3692 | } | |
8c384bfa TG |
3693 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3694 | errout: | |
3695 | if (err < 0) | |
3696 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3697 | } |
3698 | ||
1da177e4 LT |
3699 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3700 | { | |
3701 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3702 | ||
3703 | switch (event) { | |
3704 | case RTM_NEWADDR: | |
95c385b4 NH |
3705 | /* |
3706 | * If the address was optimistic | |
3707 | * we inserted the route at the start of | |
3708 | * our DAD process, so we don't need | |
3709 | * to do it again | |
3710 | */ | |
3711 | if (!(ifp->rt->rt6i_node)) | |
3712 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3713 | if (ifp->idev->cnf.forwarding) |
3714 | addrconf_join_anycast(ifp); | |
3715 | break; | |
3716 | case RTM_DELADDR: | |
3717 | if (ifp->idev->cnf.forwarding) | |
3718 | addrconf_leave_anycast(ifp); | |
3719 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3720 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3721 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3722 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3723 | break; |
3724 | } | |
3725 | } | |
3726 | ||
3727 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3728 | { | |
8814c4b5 | 3729 | rcu_read_lock_bh(); |
1da177e4 LT |
3730 | if (likely(ifp->idev->dead == 0)) |
3731 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3732 | rcu_read_unlock_bh(); |
1da177e4 LT |
3733 | } |
3734 | ||
3735 | #ifdef CONFIG_SYSCTL | |
3736 | ||
3737 | static | |
3738 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3739 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3740 | { | |
3741 | int *valp = ctl->data; | |
3742 | int val = *valp; | |
3743 | int ret; | |
3744 | ||
3745 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3746 | ||
3747 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3748 | if (valp != &ipv6_devconf.forwarding) { | |
3749 | if ((!*valp) ^ (!val)) { | |
3750 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3751 | if (idev == NULL) | |
3752 | return ret; | |
3753 | dev_forward_change(idev); | |
3754 | } | |
3755 | } else { | |
3756 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3757 | addrconf_forward_change(); | |
3758 | } | |
3759 | if (*valp) | |
3760 | rt6_purge_dflt_routers(); | |
3761 | } | |
3762 | ||
1ab1457c | 3763 | return ret; |
1da177e4 LT |
3764 | } |
3765 | ||
1ab1457c | 3766 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3767 | int __user *name, int nlen, |
3768 | void __user *oldval, | |
3769 | size_t __user *oldlenp, | |
1f29bcd7 | 3770 | void __user *newval, size_t newlen) |
1da177e4 LT |
3771 | { |
3772 | int *valp = table->data; | |
3773 | int new; | |
3774 | ||
3775 | if (!newval || !newlen) | |
3776 | return 0; | |
3777 | if (newlen != sizeof(int)) | |
3778 | return -EINVAL; | |
3779 | if (get_user(new, (int __user *)newval)) | |
3780 | return -EFAULT; | |
3781 | if (new == *valp) | |
3782 | return 0; | |
3783 | if (oldval && oldlenp) { | |
3784 | size_t len; | |
3785 | if (get_user(len, oldlenp)) | |
3786 | return -EFAULT; | |
3787 | if (len) { | |
3788 | if (len > table->maxlen) | |
3789 | len = table->maxlen; | |
3790 | if (copy_to_user(oldval, valp, len)) | |
3791 | return -EFAULT; | |
3792 | if (put_user(len, oldlenp)) | |
3793 | return -EFAULT; | |
3794 | } | |
3795 | } | |
3796 | ||
3797 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3798 | if (valp != &ipv6_devconf.forwarding) { | |
3799 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3800 | int changed; | |
3801 | if (unlikely(idev == NULL)) | |
3802 | return -ENODEV; | |
3803 | changed = (!*valp) ^ (!new); | |
3804 | *valp = new; | |
3805 | if (changed) | |
3806 | dev_forward_change(idev); | |
3807 | } else { | |
3808 | *valp = new; | |
3809 | addrconf_forward_change(); | |
3810 | } | |
3811 | ||
3812 | if (*valp) | |
3813 | rt6_purge_dflt_routers(); | |
3814 | } else | |
3815 | *valp = new; | |
3816 | ||
3817 | return 1; | |
3818 | } | |
3819 | ||
3820 | static struct addrconf_sysctl_table | |
3821 | { | |
3822 | struct ctl_table_header *sysctl_header; | |
3823 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3824 | ctl_table addrconf_dev[2]; | |
3825 | ctl_table addrconf_conf_dir[2]; | |
3826 | ctl_table addrconf_proto_dir[2]; | |
3827 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3828 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3829 | .sysctl_header = NULL, |
3830 | .addrconf_vars = { | |
1ab1457c | 3831 | { |
1da177e4 LT |
3832 | .ctl_name = NET_IPV6_FORWARDING, |
3833 | .procname = "forwarding", | |
1ab1457c | 3834 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3835 | .maxlen = sizeof(int), |
3836 | .mode = 0644, | |
1ab1457c | 3837 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3838 | .strategy = &addrconf_sysctl_forward_strategy, |
3839 | }, | |
3840 | { | |
3841 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3842 | .procname = "hop_limit", | |
1ab1457c | 3843 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3844 | .maxlen = sizeof(int), |
3845 | .mode = 0644, | |
3846 | .proc_handler = proc_dointvec, | |
3847 | }, | |
3848 | { | |
3849 | .ctl_name = NET_IPV6_MTU, | |
3850 | .procname = "mtu", | |
3851 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3852 | .maxlen = sizeof(int), |
1da177e4 | 3853 | .mode = 0644, |
1ab1457c | 3854 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3855 | }, |
3856 | { | |
3857 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3858 | .procname = "accept_ra", | |
1ab1457c | 3859 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3860 | .maxlen = sizeof(int), |
3861 | .mode = 0644, | |
1ab1457c | 3862 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3863 | }, |
3864 | { | |
3865 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3866 | .procname = "accept_redirects", | |
1ab1457c | 3867 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3868 | .maxlen = sizeof(int), |
3869 | .mode = 0644, | |
1ab1457c | 3870 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3871 | }, |
3872 | { | |
3873 | .ctl_name = NET_IPV6_AUTOCONF, | |
3874 | .procname = "autoconf", | |
1ab1457c | 3875 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3876 | .maxlen = sizeof(int), |
3877 | .mode = 0644, | |
1ab1457c | 3878 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3879 | }, |
3880 | { | |
3881 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3882 | .procname = "dad_transmits", | |
1ab1457c | 3883 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3884 | .maxlen = sizeof(int), |
3885 | .mode = 0644, | |
1ab1457c | 3886 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3887 | }, |
3888 | { | |
3889 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3890 | .procname = "router_solicitations", | |
1ab1457c | 3891 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3892 | .maxlen = sizeof(int), |
3893 | .mode = 0644, | |
1ab1457c | 3894 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3895 | }, |
3896 | { | |
3897 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3898 | .procname = "router_solicitation_interval", | |
1ab1457c | 3899 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3900 | .maxlen = sizeof(int), |
3901 | .mode = 0644, | |
1ab1457c | 3902 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3903 | .strategy = &sysctl_jiffies, |
3904 | }, | |
3905 | { | |
3906 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3907 | .procname = "router_solicitation_delay", | |
1ab1457c | 3908 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3909 | .maxlen = sizeof(int), |
3910 | .mode = 0644, | |
1ab1457c | 3911 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3912 | .strategy = &sysctl_jiffies, |
3913 | }, | |
3914 | { | |
3915 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3916 | .procname = "force_mld_version", | |
1ab1457c | 3917 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3918 | .maxlen = sizeof(int), |
3919 | .mode = 0644, | |
1ab1457c | 3920 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3921 | }, |
3922 | #ifdef CONFIG_IPV6_PRIVACY | |
3923 | { | |
3924 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3925 | .procname = "use_tempaddr", | |
1ab1457c | 3926 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3927 | .maxlen = sizeof(int), |
3928 | .mode = 0644, | |
1ab1457c | 3929 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3930 | }, |
3931 | { | |
3932 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3933 | .procname = "temp_valid_lft", | |
1ab1457c | 3934 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3935 | .maxlen = sizeof(int), |
3936 | .mode = 0644, | |
1ab1457c | 3937 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3938 | }, |
3939 | { | |
3940 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3941 | .procname = "temp_prefered_lft", | |
1ab1457c | 3942 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3943 | .maxlen = sizeof(int), |
3944 | .mode = 0644, | |
1ab1457c | 3945 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3946 | }, |
3947 | { | |
3948 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3949 | .procname = "regen_max_retry", | |
1ab1457c | 3950 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3951 | .maxlen = sizeof(int), |
3952 | .mode = 0644, | |
1ab1457c | 3953 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3954 | }, |
3955 | { | |
3956 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3957 | .procname = "max_desync_factor", | |
1ab1457c | 3958 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3959 | .maxlen = sizeof(int), |
3960 | .mode = 0644, | |
1ab1457c | 3961 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3962 | }, |
3963 | #endif | |
3964 | { | |
3965 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3966 | .procname = "max_addresses", | |
3967 | .data = &ipv6_devconf.max_addresses, | |
3968 | .maxlen = sizeof(int), | |
3969 | .mode = 0644, | |
3970 | .proc_handler = &proc_dointvec, | |
3971 | }, | |
65f5c7c1 YH |
3972 | { |
3973 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3974 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3975 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3976 | .maxlen = sizeof(int), |
3977 | .mode = 0644, | |
1ab1457c | 3978 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3979 | }, |
c4fd30eb YH |
3980 | { |
3981 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3982 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3983 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3984 | .maxlen = sizeof(int), |
3985 | .mode = 0644, | |
1ab1457c | 3986 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3987 | }, |
930d6ff2 YH |
3988 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3989 | { | |
3990 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3991 | .procname = "accept_ra_rtr_pref", | |
3992 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3993 | .maxlen = sizeof(int), | |
3994 | .mode = 0644, | |
3995 | .proc_handler = &proc_dointvec, | |
3996 | }, | |
52e16356 YH |
3997 | { |
3998 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3999 | .procname = "router_probe_interval", | |
4000 | .data = &ipv6_devconf.rtr_probe_interval, | |
4001 | .maxlen = sizeof(int), | |
4002 | .mode = 0644, | |
4003 | .proc_handler = &proc_dointvec_jiffies, | |
4004 | .strategy = &sysctl_jiffies, | |
4005 | }, | |
fa03ef38 | 4006 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4007 | { |
4008 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4009 | .procname = "accept_ra_rt_info_max_plen", | |
4010 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4011 | .maxlen = sizeof(int), | |
4012 | .mode = 0644, | |
4013 | .proc_handler = &proc_dointvec, | |
4014 | }, | |
4015 | #endif | |
930d6ff2 | 4016 | #endif |
fbea49e1 YH |
4017 | { |
4018 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4019 | .procname = "proxy_ndp", | |
4020 | .data = &ipv6_devconf.proxy_ndp, | |
4021 | .maxlen = sizeof(int), | |
4022 | .mode = 0644, | |
4023 | .proc_handler = &proc_dointvec, | |
4024 | }, | |
0bcbc926 YH |
4025 | { |
4026 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4027 | .procname = "accept_source_route", | |
4028 | .data = &ipv6_devconf.accept_source_route, | |
4029 | .maxlen = sizeof(int), | |
4030 | .mode = 0644, | |
4031 | .proc_handler = &proc_dointvec, | |
4032 | }, | |
95c385b4 NH |
4033 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4034 | { | |
4035 | .ctl_name = CTL_UNNUMBERED, | |
4036 | .procname = "optimistic_dad", | |
4037 | .data = &ipv6_devconf.optimistic_dad, | |
4038 | .maxlen = sizeof(int), | |
4039 | .mode = 0644, | |
4040 | .proc_handler = &proc_dointvec, | |
4041 | ||
4042 | }, | |
4043 | #endif | |
1da177e4 LT |
4044 | { |
4045 | .ctl_name = 0, /* sentinel */ | |
4046 | } | |
4047 | }, | |
4048 | .addrconf_dev = { | |
4049 | { | |
4050 | .ctl_name = NET_PROTO_CONF_ALL, | |
4051 | .procname = "all", | |
4052 | .mode = 0555, | |
4053 | .child = addrconf_sysctl.addrconf_vars, | |
4054 | }, | |
4055 | { | |
4056 | .ctl_name = 0, /* sentinel */ | |
4057 | } | |
4058 | }, | |
4059 | .addrconf_conf_dir = { | |
4060 | { | |
4061 | .ctl_name = NET_IPV6_CONF, | |
4062 | .procname = "conf", | |
4063 | .mode = 0555, | |
4064 | .child = addrconf_sysctl.addrconf_dev, | |
4065 | }, | |
4066 | { | |
4067 | .ctl_name = 0, /* sentinel */ | |
4068 | } | |
4069 | }, | |
4070 | .addrconf_proto_dir = { | |
4071 | { | |
4072 | .ctl_name = NET_IPV6, | |
4073 | .procname = "ipv6", | |
4074 | .mode = 0555, | |
4075 | .child = addrconf_sysctl.addrconf_conf_dir, | |
4076 | }, | |
4077 | { | |
4078 | .ctl_name = 0, /* sentinel */ | |
4079 | } | |
4080 | }, | |
4081 | .addrconf_root_dir = { | |
4082 | { | |
4083 | .ctl_name = CTL_NET, | |
4084 | .procname = "net", | |
4085 | .mode = 0555, | |
4086 | .child = addrconf_sysctl.addrconf_proto_dir, | |
4087 | }, | |
4088 | { | |
4089 | .ctl_name = 0, /* sentinel */ | |
4090 | } | |
4091 | }, | |
4092 | }; | |
4093 | ||
4094 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
4095 | { | |
4096 | int i; | |
4097 | struct net_device *dev = idev ? idev->dev : NULL; | |
4098 | struct addrconf_sysctl_table *t; | |
4099 | char *dev_name = NULL; | |
4100 | ||
af879cc7 | 4101 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
4102 | if (t == NULL) |
4103 | return; | |
1da177e4 LT |
4104 | for (i=0; t->addrconf_vars[i].data; i++) { |
4105 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 LT |
4106 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
4107 | } | |
4108 | if (dev) { | |
1ab1457c | 4109 | dev_name = dev->name; |
1da177e4 LT |
4110 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
4111 | } else { | |
4112 | dev_name = "default"; | |
4113 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
4114 | } | |
4115 | ||
1ab1457c YH |
4116 | /* |
4117 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4118 | * by sysctl and we wouldn't want anyone to change it under our feet |
4119 | * (see SIOCSIFNAME). | |
1ab1457c | 4120 | */ |
543537bd | 4121 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
4122 | if (!dev_name) |
4123 | goto free; | |
4124 | ||
4125 | t->addrconf_dev[0].procname = dev_name; | |
4126 | ||
4127 | t->addrconf_dev[0].child = t->addrconf_vars; | |
1da177e4 | 4128 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
1da177e4 | 4129 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
1da177e4 | 4130 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
1da177e4 | 4131 | |
0b4d4147 | 4132 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); |
1da177e4 LT |
4133 | if (t->sysctl_header == NULL) |
4134 | goto free_procname; | |
4135 | else | |
4136 | p->sysctl = t; | |
4137 | return; | |
4138 | ||
4139 | /* error path */ | |
4140 | free_procname: | |
4141 | kfree(dev_name); | |
4142 | free: | |
4143 | kfree(t); | |
4144 | ||
4145 | return; | |
4146 | } | |
4147 | ||
4148 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
4149 | { | |
4150 | if (p->sysctl) { | |
4151 | struct addrconf_sysctl_table *t = p->sysctl; | |
4152 | p->sysctl = NULL; | |
4153 | unregister_sysctl_table(t->sysctl_header); | |
4154 | kfree(t->addrconf_dev[0].procname); | |
4155 | kfree(t); | |
4156 | } | |
4157 | } | |
4158 | ||
4159 | ||
4160 | #endif | |
4161 | ||
4162 | /* | |
4163 | * Device notifier | |
4164 | */ | |
4165 | ||
4166 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4167 | { | |
1ab1457c | 4168 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4169 | } |
4170 | ||
7159039a YH |
4171 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4172 | ||
1da177e4 LT |
4173 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4174 | { | |
1ab1457c | 4175 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4176 | } |
4177 | ||
7159039a YH |
4178 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4179 | ||
1da177e4 LT |
4180 | /* |
4181 | * Init / cleanup code | |
4182 | */ | |
4183 | ||
4184 | int __init addrconf_init(void) | |
4185 | { | |
4186 | int err = 0; | |
4187 | ||
4188 | /* The addrconf netdev notifier requires that loopback_dev | |
4189 | * has it's ipv6 private information allocated and setup | |
4190 | * before it can bring up and give link-local addresses | |
4191 | * to other devices which are up. | |
4192 | * | |
4193 | * Unfortunately, loopback_dev is not necessarily the first | |
4194 | * entry in the global dev_base list of net devices. In fact, | |
4195 | * it is likely to be the very last entry on that list. | |
4196 | * So this causes the notifier registry below to try and | |
4197 | * give link-local addresses to all devices besides loopback_dev | |
4198 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4199 | * devices to fail to get a link-local address. | |
4200 | * | |
4201 | * So, as a temporary fix, allocate the ipv6 structure for | |
4202 | * loopback_dev first by hand. | |
4203 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4204 | * device and it being up should be removed. | |
4205 | */ | |
4206 | rtnl_lock(); | |
4207 | if (!ipv6_add_dev(&loopback_dev)) | |
4208 | err = -ENOMEM; | |
4209 | rtnl_unlock(); | |
4210 | if (err) | |
4211 | return err; | |
4212 | ||
c62dba90 | 4213 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
9a6bf6fe YH |
4214 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
4215 | ip6_prohibit_entry.rt6i_idev = in6_dev_get(&loopback_dev); | |
4216 | ip6_blk_hole_entry.rt6i_idev = in6_dev_get(&loopback_dev); | |
4217 | #endif | |
c62dba90 | 4218 | |
1da177e4 LT |
4219 | register_netdevice_notifier(&ipv6_dev_notf); |
4220 | ||
1da177e4 | 4221 | addrconf_verify(0); |
c127ea2c TG |
4222 | |
4223 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4224 | if (err < 0) | |
4225 | goto errout; | |
4226 | ||
4227 | /* Only the first call to __rtnl_register can fail */ | |
4228 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4229 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4230 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4231 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4232 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4233 | ||
1da177e4 LT |
4234 | #ifdef CONFIG_SYSCTL |
4235 | addrconf_sysctl.sysctl_header = | |
0b4d4147 | 4236 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir); |
1da177e4 LT |
4237 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
4238 | #endif | |
4239 | ||
4240 | return 0; | |
c127ea2c TG |
4241 | errout: |
4242 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4243 | ||
4244 | return err; | |
1da177e4 LT |
4245 | } |
4246 | ||
4247 | void __exit addrconf_cleanup(void) | |
4248 | { | |
1ab1457c | 4249 | struct net_device *dev; |
1ab1457c | 4250 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4251 | int i; |
4252 | ||
4253 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4254 | ||
1da177e4 LT |
4255 | #ifdef CONFIG_SYSCTL |
4256 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4257 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4258 | #endif | |
4259 | ||
4260 | rtnl_lock(); | |
4261 | ||
4262 | /* | |
4263 | * clean dev list. | |
4264 | */ | |
4265 | ||
7562f876 | 4266 | for_each_netdev(dev) { |
dffe4f04 | 4267 | if (__in6_dev_get(dev) == NULL) |
1da177e4 LT |
4268 | continue; |
4269 | addrconf_ifdown(dev, 1); | |
4270 | } | |
4271 | addrconf_ifdown(&loopback_dev, 2); | |
4272 | ||
4273 | /* | |
4274 | * Check hash table. | |
4275 | */ | |
4276 | ||
4277 | write_lock_bh(&addrconf_hash_lock); | |
4278 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4279 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4280 | struct inet6_ifaddr *bifa; | |
4281 | ||
4282 | bifa = ifa; | |
4283 | ifa = ifa->lst_next; | |
4284 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4285 | /* Do not free it; something is wrong. | |
4286 | Now we can investigate it with debugger. | |
4287 | */ | |
4288 | } | |
4289 | } | |
4290 | write_unlock_bh(&addrconf_hash_lock); | |
4291 | ||
4292 | del_timer(&addr_chk_timer); | |
4293 | ||
4294 | rtnl_unlock(); | |
4295 | ||
1da177e4 | 4296 | #ifdef CONFIG_PROC_FS |
457c4cbc | 4297 | proc_net_remove(&init_net, "if_inet6"); |
1da177e4 LT |
4298 | #endif |
4299 | } |