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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/types.h> | |
a0bffffc | 43 | #include <linux/kernel.h> |
1da177e4 LT |
44 | #include <linux/socket.h> |
45 | #include <linux/sockios.h> | |
1da177e4 LT |
46 | #include <linux/net.h> |
47 | #include <linux/in6.h> | |
48 | #include <linux/netdevice.h> | |
1823730f | 49 | #include <linux/if_addr.h> |
1da177e4 LT |
50 | #include <linux/if_arp.h> |
51 | #include <linux/if_arcnet.h> | |
52 | #include <linux/if_infiniband.h> | |
53 | #include <linux/route.h> | |
54 | #include <linux/inetdevice.h> | |
55 | #include <linux/init.h> | |
56 | #ifdef CONFIG_SYSCTL | |
57 | #include <linux/sysctl.h> | |
58 | #endif | |
4fc268d2 | 59 | #include <linux/capability.h> |
1da177e4 LT |
60 | #include <linux/delay.h> |
61 | #include <linux/notifier.h> | |
543537bd | 62 | #include <linux/string.h> |
1da177e4 | 63 | |
457c4cbc | 64 | #include <net/net_namespace.h> |
1da177e4 LT |
65 | #include <net/sock.h> |
66 | #include <net/snmp.h> | |
67 | ||
68 | #include <net/ipv6.h> | |
69 | #include <net/protocol.h> | |
70 | #include <net/ndisc.h> | |
71 | #include <net/ip6_route.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/tcp.h> | |
74 | #include <net/ip.h> | |
5d620266 | 75 | #include <net/netlink.h> |
f24e3d65 | 76 | #include <net/pkt_sched.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 | |
f52295a9 | 103 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
104 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
105 | #else | |
106 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
107 | { | |
108 | } | |
109 | ||
110 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
111 | { | |
112 | } | |
1da177e4 LT |
113 | #endif |
114 | ||
115 | #ifdef CONFIG_IPV6_PRIVACY | |
116 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 117 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
118 | static void ipv6_regen_rndid(unsigned long data); |
119 | ||
120 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
121 | #endif |
122 | ||
1b34be74 | 123 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
124 | static int ipv6_count_addresses(struct inet6_dev *idev); |
125 | ||
126 | /* | |
127 | * Configured unicast address hash table | |
128 | */ | |
129 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
130 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
131 | ||
1da177e4 LT |
132 | static void addrconf_verify(unsigned long); |
133 | ||
8d06afab | 134 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
135 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
136 | ||
137 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
138 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
139 | ||
140 | static int addrconf_ifdown(struct net_device *dev, int how); | |
141 | ||
e431b8c0 | 142 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
143 | static void addrconf_dad_timer(unsigned long data); |
144 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 145 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
146 | static void addrconf_rs_timer(unsigned long data); |
147 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
148 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
149 | ||
1ab1457c | 150 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 151 | struct prefix_info *pinfo); |
06bfe655 DL |
152 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
153 | struct net_device *dev); | |
1da177e4 | 154 | |
e041c683 | 155 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 156 | |
888c848e | 157 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
158 | .forwarding = 0, |
159 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
160 | .mtu6 = IPV6_MIN_MTU, | |
161 | .accept_ra = 1, | |
162 | .accept_redirects = 1, | |
163 | .autoconf = 1, | |
164 | .force_mld_version = 0, | |
165 | .dad_transmits = 1, | |
166 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
167 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
168 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
169 | #ifdef CONFIG_IPV6_PRIVACY | |
170 | .use_tempaddr = 0, | |
171 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
172 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
173 | .regen_max_retry = REGEN_MAX_RETRY, | |
174 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
175 | #endif | |
176 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 177 | .accept_ra_defrtr = 1, |
c4fd30eb | 178 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
179 | #ifdef CONFIG_IPV6_ROUTER_PREF |
180 | .accept_ra_rtr_pref = 1, | |
52e16356 | 181 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
182 | #ifdef CONFIG_IPV6_ROUTE_INFO |
183 | .accept_ra_rt_info_max_plen = 0, | |
184 | #endif | |
930d6ff2 | 185 | #endif |
fbea49e1 | 186 | .proxy_ndp = 0, |
0bcbc926 | 187 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 188 | .disable_ipv6 = 0, |
1b34be74 | 189 | .accept_dad = 1, |
1da177e4 LT |
190 | }; |
191 | ||
ab32ea5d | 192 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
193 | .forwarding = 0, |
194 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
195 | .mtu6 = IPV6_MIN_MTU, | |
196 | .accept_ra = 1, | |
197 | .accept_redirects = 1, | |
198 | .autoconf = 1, | |
199 | .dad_transmits = 1, | |
200 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
201 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
202 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
203 | #ifdef CONFIG_IPV6_PRIVACY | |
204 | .use_tempaddr = 0, | |
205 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
206 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
207 | .regen_max_retry = REGEN_MAX_RETRY, | |
208 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
209 | #endif | |
210 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 211 | .accept_ra_defrtr = 1, |
c4fd30eb | 212 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
213 | #ifdef CONFIG_IPV6_ROUTER_PREF |
214 | .accept_ra_rtr_pref = 1, | |
52e16356 | 215 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
216 | #ifdef CONFIG_IPV6_ROUTE_INFO |
217 | .accept_ra_rt_info_max_plen = 0, | |
218 | #endif | |
930d6ff2 | 219 | #endif |
fbea49e1 | 220 | .proxy_ndp = 0, |
0bcbc926 | 221 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 222 | .disable_ipv6 = 0, |
1b34be74 | 223 | .accept_dad = 1, |
1da177e4 LT |
224 | }; |
225 | ||
226 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 227 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 228 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
229 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
230 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 231 | |
f24e3d65 | 232 | /* Check if a valid qdisc is available */ |
05297949 | 233 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 234 | { |
05297949 | 235 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
236 | } |
237 | ||
2b5ead46 YH |
238 | /* Check if a route is valid prefix route */ |
239 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
240 | { | |
241 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); | |
242 | } | |
243 | ||
1da177e4 LT |
244 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
245 | { | |
246 | if (del_timer(&ifp->timer)) | |
247 | __in6_ifa_put(ifp); | |
248 | } | |
249 | ||
250 | enum addrconf_timer_t | |
251 | { | |
252 | AC_NONE, | |
253 | AC_DAD, | |
254 | AC_RS, | |
255 | }; | |
256 | ||
257 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
258 | enum addrconf_timer_t what, | |
259 | unsigned long when) | |
260 | { | |
261 | if (!del_timer(&ifp->timer)) | |
262 | in6_ifa_hold(ifp); | |
263 | ||
264 | switch (what) { | |
265 | case AC_DAD: | |
266 | ifp->timer.function = addrconf_dad_timer; | |
267 | break; | |
268 | case AC_RS: | |
269 | ifp->timer.function = addrconf_rs_timer; | |
270 | break; | |
271 | default:; | |
272 | } | |
273 | ifp->timer.expires = jiffies + when; | |
274 | add_timer(&ifp->timer); | |
275 | } | |
276 | ||
7f7d9a6b HX |
277 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
278 | { | |
7f7d9a6b | 279 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 280 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
281 | goto err_ip; |
282 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 283 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 284 | goto err_icmp; |
14878f75 | 285 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 286 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 287 | goto err_icmpmsg; |
7f7d9a6b HX |
288 | |
289 | return 0; | |
290 | ||
14878f75 DS |
291 | err_icmpmsg: |
292 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
293 | err_icmp: |
294 | snmp_mib_free((void **)idev->stats.ipv6); | |
295 | err_ip: | |
aaf70ec7 | 296 | return -ENOMEM; |
7f7d9a6b HX |
297 | } |
298 | ||
16910b98 | 299 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 300 | { |
14878f75 | 301 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
302 | snmp_mib_free((void **)idev->stats.icmpv6); |
303 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
304 | } |
305 | ||
1da177e4 LT |
306 | /* Nobody refers to this device, we may destroy it. */ |
307 | ||
8814c4b5 YH |
308 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
309 | { | |
310 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
311 | kfree(idev); | |
312 | } | |
313 | ||
1da177e4 LT |
314 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
315 | { | |
316 | struct net_device *dev = idev->dev; | |
547b792c IJ |
317 | |
318 | WARN_ON(idev->addr_list != NULL); | |
319 | WARN_ON(idev->mc_list != NULL); | |
320 | ||
1da177e4 LT |
321 | #ifdef NET_REFCNT_DEBUG |
322 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
323 | #endif | |
324 | dev_put(dev); | |
325 | if (!idev->dead) { | |
326 | printk("Freeing alive inet6 device %p\n", idev); | |
327 | return; | |
328 | } | |
329 | snmp6_free_dev(idev); | |
8814c4b5 | 330 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
331 | } |
332 | ||
7159039a YH |
333 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
334 | ||
1da177e4 LT |
335 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
336 | { | |
337 | struct inet6_dev *ndev; | |
338 | ||
339 | ASSERT_RTNL(); | |
340 | ||
341 | if (dev->mtu < IPV6_MIN_MTU) | |
342 | return NULL; | |
343 | ||
1ab1457c | 344 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 345 | |
1ab1457c YH |
346 | if (ndev == NULL) |
347 | return NULL; | |
322f74a4 IO |
348 | |
349 | rwlock_init(&ndev->lock); | |
350 | ndev->dev = dev; | |
c346dca1 | 351 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
352 | ndev->cnf.mtu6 = dev->mtu; |
353 | ndev->cnf.sysctl = NULL; | |
354 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
355 | if (ndev->nd_parms == NULL) { | |
356 | kfree(ndev); | |
357 | return NULL; | |
358 | } | |
0187bdfb BH |
359 | if (ndev->cnf.forwarding) |
360 | dev_disable_lro(dev); | |
322f74a4 IO |
361 | /* We refer to the device */ |
362 | dev_hold(dev); | |
1da177e4 | 363 | |
322f74a4 IO |
364 | if (snmp6_alloc_dev(ndev) < 0) { |
365 | ADBG((KERN_WARNING | |
366 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 367 | __func__, dev->name)); |
322f74a4 IO |
368 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
369 | ndev->dead = 1; | |
370 | in6_dev_finish_destroy(ndev); | |
371 | return NULL; | |
372 | } | |
1da177e4 | 373 | |
322f74a4 IO |
374 | if (snmp6_register_dev(ndev) < 0) { |
375 | ADBG((KERN_WARNING | |
376 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 377 | __func__, dev->name)); |
322f74a4 IO |
378 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
379 | ndev->dead = 1; | |
380 | in6_dev_finish_destroy(ndev); | |
381 | return NULL; | |
382 | } | |
383 | ||
384 | /* One reference from device. We must do this before | |
385 | * we invoke __ipv6_regen_rndid(). | |
386 | */ | |
387 | in6_dev_hold(ndev); | |
1da177e4 | 388 | |
1b34be74 YH |
389 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
390 | ndev->cnf.accept_dad = -1; | |
391 | ||
b077d7ab YH |
392 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
393 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
394 | printk(KERN_INFO | |
395 | "%s: Disabled Multicast RS\n", | |
396 | dev->name); | |
397 | ndev->cnf.rtr_solicits = 0; | |
398 | } | |
399 | #endif | |
400 | ||
1da177e4 | 401 | #ifdef CONFIG_IPV6_PRIVACY |
b24b8a24 | 402 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
403 | if ((dev->flags&IFF_LOOPBACK) || |
404 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 405 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 406 | dev->type == ARPHRD_SIT || |
0be669bb | 407 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
408 | printk(KERN_INFO |
409 | "%s: Disabled Privacy Extensions\n", | |
410 | dev->name); | |
411 | ndev->cnf.use_tempaddr = -1; | |
412 | } else { | |
413 | in6_dev_hold(ndev); | |
414 | ipv6_regen_rndid((unsigned long) ndev); | |
415 | } | |
1da177e4 LT |
416 | #endif |
417 | ||
f24e3d65 | 418 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
419 | ndev->if_flags |= IF_READY; |
420 | ||
322f74a4 IO |
421 | ipv6_mc_init_dev(ndev); |
422 | ndev->tstamp = jiffies; | |
f52295a9 | 423 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
424 | /* protected by rtnl_lock */ |
425 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
426 | |
427 | /* Join all-node multicast group */ | |
f3ee4010 | 428 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 429 | |
1da177e4 LT |
430 | return ndev; |
431 | } | |
432 | ||
cee89473 | 433 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
434 | { |
435 | struct inet6_dev *idev; | |
436 | ||
437 | ASSERT_RTNL(); | |
438 | ||
439 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
440 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
441 | return NULL; | |
442 | } | |
c5e33bdd | 443 | |
1da177e4 LT |
444 | if (dev->flags&IFF_UP) |
445 | ipv6_mc_up(idev); | |
446 | return idev; | |
447 | } | |
448 | ||
449 | #ifdef CONFIG_SYSCTL | |
450 | static void dev_forward_change(struct inet6_dev *idev) | |
451 | { | |
452 | struct net_device *dev; | |
453 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
454 | |
455 | if (!idev) | |
456 | return; | |
457 | dev = idev->dev; | |
0187bdfb BH |
458 | if (idev->cnf.forwarding) |
459 | dev_disable_lro(dev); | |
1da177e4 | 460 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 461 | if (idev->cnf.forwarding) |
f3ee4010 | 462 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 463 | else |
f3ee4010 | 464 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 LT |
465 | } |
466 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
467 | if (ifa->flags&IFA_F_TENTATIVE) |
468 | continue; | |
1da177e4 LT |
469 | if (idev->cnf.forwarding) |
470 | addrconf_join_anycast(ifa); | |
471 | else | |
472 | addrconf_leave_anycast(ifa); | |
473 | } | |
474 | } | |
475 | ||
476 | ||
e186932b | 477 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
478 | { |
479 | struct net_device *dev; | |
480 | struct inet6_dev *idev; | |
481 | ||
482 | read_lock(&dev_base_lock); | |
bff16c2f | 483 | for_each_netdev(net, dev) { |
8814c4b5 | 484 | rcu_read_lock(); |
1da177e4 LT |
485 | idev = __in6_dev_get(dev); |
486 | if (idev) { | |
e186932b PE |
487 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
488 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
489 | if (changed) |
490 | dev_forward_change(idev); | |
491 | } | |
8814c4b5 | 492 | rcu_read_unlock(); |
1da177e4 LT |
493 | } |
494 | read_unlock(&dev_base_lock); | |
495 | } | |
c8fecf22 | 496 | |
b325fddb | 497 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf22 | 498 | { |
bff16c2f PE |
499 | struct net *net; |
500 | ||
501 | net = (struct net *)table->extra2; | |
441fc2a2 | 502 | if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb SH |
503 | return 0; |
504 | ||
505 | if (!rtnl_trylock()) | |
5007392d | 506 | return restart_syscall(); |
c8fecf22 | 507 | |
e186932b PE |
508 | if (p == &net->ipv6.devconf_all->forwarding) { |
509 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
510 | net->ipv6.devconf_dflt->forwarding = newf; | |
511 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
512 | } else if ((!*p) ^ (!old)) |
513 | dev_forward_change((struct inet6_dev *)table->extra1); | |
0187bdfb | 514 | rtnl_unlock(); |
c8fecf22 PE |
515 | |
516 | if (*p) | |
7b4da532 | 517 | rt6_purge_dflt_routers(net); |
b325fddb | 518 | return 1; |
c8fecf22 | 519 | } |
1da177e4 LT |
520 | #endif |
521 | ||
522 | /* Nobody refers to this ifaddr, destroy it */ | |
523 | ||
524 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
525 | { | |
547b792c IJ |
526 | WARN_ON(ifp->if_next != NULL); |
527 | WARN_ON(ifp->lst_next != NULL); | |
528 | ||
1da177e4 LT |
529 | #ifdef NET_REFCNT_DEBUG |
530 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
531 | #endif | |
532 | ||
533 | in6_dev_put(ifp->idev); | |
534 | ||
535 | if (del_timer(&ifp->timer)) | |
536 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
537 | ||
538 | if (!ifp->dead) { | |
539 | printk("Freeing alive inet6 address %p\n", ifp); | |
540 | return; | |
541 | } | |
542 | dst_release(&ifp->rt->u.dst); | |
543 | ||
544 | kfree(ifp); | |
545 | } | |
546 | ||
e55ffac6 BH |
547 | static void |
548 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
549 | { | |
550 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 551 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
552 | |
553 | /* | |
554 | * Each device address list is sorted in order of scope - | |
555 | * global before linklocal. | |
556 | */ | |
557 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
558 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 559 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
560 | break; |
561 | } | |
562 | ||
563 | ifp->if_next = *ifap; | |
564 | *ifap = ifp; | |
565 | } | |
566 | ||
3eb84f49 YH |
567 | /* |
568 | * Hash function taken from net_alias.c | |
569 | */ | |
570 | static u8 ipv6_addr_hash(const struct in6_addr *addr) | |
571 | { | |
572 | __u32 word; | |
573 | ||
574 | /* | |
575 | * We perform the hash function over the last 64 bits of the address | |
576 | * This will include the IEEE address token on links that support it. | |
577 | */ | |
578 | ||
579 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); | |
580 | word ^= (word >> 16); | |
581 | word ^= (word >> 8); | |
582 | ||
583 | return ((word ^ (word >> 4)) & 0x0f); | |
584 | } | |
585 | ||
1da177e4 LT |
586 | /* On success it returns ifp with increased reference count */ |
587 | ||
588 | static struct inet6_ifaddr * | |
589 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 590 | int scope, u32 flags) |
1da177e4 LT |
591 | { |
592 | struct inet6_ifaddr *ifa = NULL; | |
593 | struct rt6_info *rt; | |
594 | int hash; | |
595 | int err = 0; | |
d68b8270 YH |
596 | int addr_type = ipv6_addr_type(addr); |
597 | ||
598 | if (addr_type == IPV6_ADDR_ANY || | |
599 | addr_type & IPV6_ADDR_MULTICAST || | |
600 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
601 | addr_type & IPV6_ADDR_LOOPBACK)) | |
602 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 603 | |
8814c4b5 | 604 | rcu_read_lock_bh(); |
1da177e4 LT |
605 | if (idev->dead) { |
606 | err = -ENODEV; /*XXX*/ | |
607 | goto out2; | |
608 | } | |
609 | ||
56d417b1 | 610 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
611 | err = -EACCES; |
612 | goto out2; | |
613 | } | |
614 | ||
1da177e4 LT |
615 | write_lock(&addrconf_hash_lock); |
616 | ||
617 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 618 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
619 | ADBG(("ipv6_add_addr: already assigned\n")); |
620 | err = -EEXIST; | |
621 | goto out; | |
622 | } | |
623 | ||
322f74a4 | 624 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
625 | |
626 | if (ifa == NULL) { | |
627 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
628 | err = -ENOBUFS; | |
629 | goto out; | |
630 | } | |
631 | ||
632 | rt = addrconf_dst_alloc(idev, addr, 0); | |
633 | if (IS_ERR(rt)) { | |
634 | err = PTR_ERR(rt); | |
635 | goto out; | |
636 | } | |
637 | ||
1da177e4 LT |
638 | ipv6_addr_copy(&ifa->addr, addr); |
639 | ||
640 | spin_lock_init(&ifa->lock); | |
641 | init_timer(&ifa->timer); | |
642 | ifa->timer.data = (unsigned long) ifa; | |
643 | ifa->scope = scope; | |
644 | ifa->prefix_len = pfxlen; | |
645 | ifa->flags = flags | IFA_F_TENTATIVE; | |
646 | ifa->cstamp = ifa->tstamp = jiffies; | |
647 | ||
57f5f544 KF |
648 | ifa->rt = rt; |
649 | ||
95c385b4 NH |
650 | /* |
651 | * part one of RFC 4429, section 3.3 | |
652 | * We should not configure an address as | |
653 | * optimistic if we do not yet know the link | |
654 | * layer address of our nexhop router | |
655 | */ | |
656 | ||
657 | if (rt->rt6i_nexthop == NULL) | |
658 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
659 | ||
1da177e4 LT |
660 | ifa->idev = idev; |
661 | in6_dev_hold(idev); | |
662 | /* For caller */ | |
663 | in6_ifa_hold(ifa); | |
664 | ||
665 | /* Add to big hash table */ | |
666 | hash = ipv6_addr_hash(addr); | |
667 | ||
668 | ifa->lst_next = inet6_addr_lst[hash]; | |
669 | inet6_addr_lst[hash] = ifa; | |
670 | in6_ifa_hold(ifa); | |
671 | write_unlock(&addrconf_hash_lock); | |
672 | ||
673 | write_lock(&idev->lock); | |
674 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 675 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
676 | |
677 | #ifdef CONFIG_IPV6_PRIVACY | |
678 | if (ifa->flags&IFA_F_TEMPORARY) { | |
679 | ifa->tmp_next = idev->tempaddr_list; | |
680 | idev->tempaddr_list = ifa; | |
681 | in6_ifa_hold(ifa); | |
682 | } | |
683 | #endif | |
684 | ||
1da177e4 LT |
685 | in6_ifa_hold(ifa); |
686 | write_unlock(&idev->lock); | |
687 | out2: | |
8814c4b5 | 688 | rcu_read_unlock_bh(); |
1da177e4 | 689 | |
fd92833a | 690 | if (likely(err == 0)) |
e041c683 | 691 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
692 | else { |
693 | kfree(ifa); | |
694 | ifa = ERR_PTR(err); | |
695 | } | |
696 | ||
697 | return ifa; | |
698 | out: | |
699 | write_unlock(&addrconf_hash_lock); | |
700 | goto out2; | |
701 | } | |
702 | ||
703 | /* This function wants to get referenced ifp and releases it before return */ | |
704 | ||
705 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
706 | { | |
707 | struct inet6_ifaddr *ifa, **ifap; | |
708 | struct inet6_dev *idev = ifp->idev; | |
709 | int hash; | |
710 | int deleted = 0, onlink = 0; | |
711 | unsigned long expires = jiffies; | |
712 | ||
713 | hash = ipv6_addr_hash(&ifp->addr); | |
714 | ||
715 | ifp->dead = 1; | |
716 | ||
717 | write_lock_bh(&addrconf_hash_lock); | |
718 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
719 | ifap = &ifa->lst_next) { | |
720 | if (ifa == ifp) { | |
721 | *ifap = ifa->lst_next; | |
722 | __in6_ifa_put(ifp); | |
723 | ifa->lst_next = NULL; | |
724 | break; | |
725 | } | |
726 | } | |
727 | write_unlock_bh(&addrconf_hash_lock); | |
728 | ||
729 | write_lock_bh(&idev->lock); | |
730 | #ifdef CONFIG_IPV6_PRIVACY | |
731 | if (ifp->flags&IFA_F_TEMPORARY) { | |
732 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
733 | ifap = &ifa->tmp_next) { | |
734 | if (ifa == ifp) { | |
735 | *ifap = ifa->tmp_next; | |
736 | if (ifp->ifpub) { | |
737 | in6_ifa_put(ifp->ifpub); | |
738 | ifp->ifpub = NULL; | |
739 | } | |
740 | __in6_ifa_put(ifp); | |
741 | ifa->tmp_next = NULL; | |
742 | break; | |
743 | } | |
744 | } | |
745 | } | |
746 | #endif | |
747 | ||
1d142804 | 748 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
749 | if (ifa == ifp) { |
750 | *ifap = ifa->if_next; | |
751 | __in6_ifa_put(ifp); | |
752 | ifa->if_next = NULL; | |
753 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
754 | break; | |
755 | deleted = 1; | |
1d142804 | 756 | continue; |
1da177e4 LT |
757 | } else if (ifp->flags & IFA_F_PERMANENT) { |
758 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
759 | ifp->prefix_len)) { | |
760 | if (ifa->flags & IFA_F_PERMANENT) { | |
761 | onlink = 1; | |
762 | if (deleted) | |
763 | break; | |
764 | } else { | |
765 | unsigned long lifetime; | |
766 | ||
767 | if (!onlink) | |
768 | onlink = -1; | |
769 | ||
770 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
771 | |
772 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
773 | /* | |
774 | * Note: Because this address is | |
775 | * not permanent, lifetime < | |
776 | * LONG_MAX / HZ here. | |
777 | */ | |
1da177e4 LT |
778 | if (time_before(expires, |
779 | ifa->tstamp + lifetime * HZ)) | |
780 | expires = ifa->tstamp + lifetime * HZ; | |
781 | spin_unlock(&ifa->lock); | |
782 | } | |
783 | } | |
784 | } | |
1d142804 | 785 | ifap = &ifa->if_next; |
1da177e4 LT |
786 | } |
787 | write_unlock_bh(&idev->lock); | |
788 | ||
b2238566 AV |
789 | addrconf_del_timer(ifp); |
790 | ||
1da177e4 LT |
791 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
792 | ||
e041c683 | 793 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 794 | |
1da177e4 LT |
795 | /* |
796 | * Purge or update corresponding prefix | |
797 | * | |
798 | * 1) we don't purge prefix here if address was not permanent. | |
799 | * prefix is managed by its own lifetime. | |
800 | * 2) if there're no addresses, delete prefix. | |
801 | * 3) if there're still other permanent address(es), | |
802 | * corresponding prefix is still permanent. | |
803 | * 4) otherwise, update prefix lifetime to the | |
804 | * longest valid lifetime among the corresponding | |
805 | * addresses on the device. | |
806 | * Note: subsequent RA will update lifetime. | |
807 | * | |
808 | * --yoshfuji | |
809 | */ | |
810 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
811 | struct in6_addr prefix; | |
812 | struct rt6_info *rt; | |
c346dca1 | 813 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 814 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 815 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 816 | |
2b5ead46 | 817 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 818 | if (onlink == 0) { |
e0a1ad73 | 819 | ip6_del_rt(rt); |
1da177e4 LT |
820 | rt = NULL; |
821 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
822 | rt->rt6i_expires = expires; | |
823 | rt->rt6i_flags |= RTF_EXPIRES; | |
824 | } | |
825 | } | |
826 | dst_release(&rt->u.dst); | |
827 | } | |
828 | ||
829 | in6_ifa_put(ifp); | |
830 | } | |
831 | ||
832 | #ifdef CONFIG_IPV6_PRIVACY | |
833 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
834 | { | |
835 | struct inet6_dev *idev = ifp->idev; | |
836 | struct in6_addr addr, *tmpaddr; | |
837 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 838 | unsigned long regen_advance; |
1da177e4 LT |
839 | int tmp_plen; |
840 | int ret = 0; | |
841 | int max_addresses; | |
95c385b4 | 842 | u32 addr_flags; |
1da177e4 LT |
843 | |
844 | write_lock(&idev->lock); | |
845 | if (ift) { | |
846 | spin_lock_bh(&ift->lock); | |
847 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
848 | spin_unlock_bh(&ift->lock); | |
849 | tmpaddr = &addr; | |
850 | } else { | |
851 | tmpaddr = NULL; | |
852 | } | |
853 | retry: | |
854 | in6_dev_hold(idev); | |
855 | if (idev->cnf.use_tempaddr <= 0) { | |
856 | write_unlock(&idev->lock); | |
857 | printk(KERN_INFO | |
858 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
859 | in6_dev_put(idev); | |
860 | ret = -1; | |
861 | goto out; | |
862 | } | |
863 | spin_lock_bh(&ifp->lock); | |
864 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
865 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
866 | spin_unlock_bh(&ifp->lock); | |
867 | write_unlock(&idev->lock); | |
868 | printk(KERN_WARNING | |
869 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
870 | in6_dev_put(idev); | |
871 | ret = -1; | |
872 | goto out; | |
873 | } | |
874 | in6_ifa_hold(ifp); | |
875 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
876 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
877 | spin_unlock_bh(&ifp->lock); | |
878 | write_unlock(&idev->lock); | |
879 | printk(KERN_WARNING | |
880 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
881 | in6_ifa_put(ifp); | |
882 | in6_dev_put(idev); | |
883 | ret = -1; | |
884 | goto out; | |
885 | } | |
886 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
887 | tmp_valid_lft = min_t(__u32, | |
888 | ifp->valid_lft, | |
889 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
890 | tmp_prefered_lft = min_t(__u32, |
891 | ifp->prefered_lft, | |
1da177e4 LT |
892 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
893 | tmp_plen = ifp->prefix_len; | |
894 | max_addresses = idev->cnf.max_addresses; | |
895 | tmp_cstamp = ifp->cstamp; | |
896 | tmp_tstamp = ifp->tstamp; | |
897 | spin_unlock_bh(&ifp->lock); | |
898 | ||
eac55bf9 BB |
899 | regen_advance = idev->cnf.regen_max_retry * |
900 | idev->cnf.dad_transmits * | |
901 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 902 | write_unlock(&idev->lock); |
95c385b4 | 903 | |
eac55bf9 BB |
904 | /* A temporary address is created only if this calculated Preferred |
905 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
906 | * an implementation must not create a temporary address with a zero | |
907 | * Preferred Lifetime. | |
908 | */ | |
909 | if (tmp_prefered_lft <= regen_advance) { | |
910 | in6_ifa_put(ifp); | |
911 | in6_dev_put(idev); | |
912 | ret = -1; | |
913 | goto out; | |
914 | } | |
915 | ||
95c385b4 NH |
916 | addr_flags = IFA_F_TEMPORARY; |
917 | /* set in addrconf_prefix_rcv() */ | |
918 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
919 | addr_flags |= IFA_F_OPTIMISTIC; | |
920 | ||
1da177e4 | 921 | ift = !max_addresses || |
1ab1457c | 922 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 923 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
924 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
925 | addr_flags) : NULL; | |
1da177e4 LT |
926 | if (!ift || IS_ERR(ift)) { |
927 | in6_ifa_put(ifp); | |
928 | in6_dev_put(idev); | |
929 | printk(KERN_INFO | |
930 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
931 | tmpaddr = &addr; | |
932 | write_lock(&idev->lock); | |
933 | goto retry; | |
934 | } | |
935 | ||
936 | spin_lock_bh(&ift->lock); | |
937 | ift->ifpub = ifp; | |
938 | ift->valid_lft = tmp_valid_lft; | |
939 | ift->prefered_lft = tmp_prefered_lft; | |
940 | ift->cstamp = tmp_cstamp; | |
941 | ift->tstamp = tmp_tstamp; | |
942 | spin_unlock_bh(&ift->lock); | |
943 | ||
944 | addrconf_dad_start(ift, 0); | |
945 | in6_ifa_put(ift); | |
946 | in6_dev_put(idev); | |
947 | out: | |
948 | return ret; | |
949 | } | |
950 | #endif | |
951 | ||
952 | /* | |
072047e4 | 953 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 954 | */ |
a9b05723 YH |
955 | enum { |
956 | IPV6_SADDR_RULE_INIT = 0, | |
957 | IPV6_SADDR_RULE_LOCAL, | |
958 | IPV6_SADDR_RULE_SCOPE, | |
959 | IPV6_SADDR_RULE_PREFERRED, | |
960 | #ifdef CONFIG_IPV6_MIP6 | |
961 | IPV6_SADDR_RULE_HOA, | |
962 | #endif | |
963 | IPV6_SADDR_RULE_OIF, | |
964 | IPV6_SADDR_RULE_LABEL, | |
965 | #ifdef CONFIG_IPV6_PRIVACY | |
966 | IPV6_SADDR_RULE_PRIVACY, | |
967 | #endif | |
968 | IPV6_SADDR_RULE_ORCHID, | |
969 | IPV6_SADDR_RULE_PREFIX, | |
970 | IPV6_SADDR_RULE_MAX | |
971 | }; | |
972 | ||
072047e4 | 973 | struct ipv6_saddr_score { |
a9b05723 YH |
974 | int rule; |
975 | int addr_type; | |
976 | struct inet6_ifaddr *ifa; | |
977 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
978 | int scopedist; | |
979 | int matchlen; | |
072047e4 YH |
980 | }; |
981 | ||
a9b05723 | 982 | struct ipv6_saddr_dst { |
9acd9f3a | 983 | const struct in6_addr *addr; |
a9b05723 YH |
984 | int ifindex; |
985 | int scope; | |
986 | int label; | |
7cbca67c | 987 | unsigned int prefs; |
a9b05723 | 988 | }; |
072047e4 | 989 | |
b6f99a21 | 990 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 991 | { |
072047e4 YH |
992 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
993 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
994 | return 1; | |
995 | return 0; | |
1da177e4 LT |
996 | } |
997 | ||
3de23255 BT |
998 | static int ipv6_get_saddr_eval(struct net *net, |
999 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1000 | struct ipv6_saddr_dst *dst, |
1001 | int i) | |
1002 | { | |
1003 | int ret; | |
1004 | ||
1005 | if (i <= score->rule) { | |
1006 | switch (i) { | |
1007 | case IPV6_SADDR_RULE_SCOPE: | |
1008 | ret = score->scopedist; | |
1009 | break; | |
1010 | case IPV6_SADDR_RULE_PREFIX: | |
1011 | ret = score->matchlen; | |
1012 | break; | |
1013 | default: | |
1014 | ret = !!test_bit(i, score->scorebits); | |
1015 | } | |
1016 | goto out; | |
1017 | } | |
1018 | ||
1019 | switch (i) { | |
1020 | case IPV6_SADDR_RULE_INIT: | |
1021 | /* Rule 0: remember if hiscore is not ready yet */ | |
1022 | ret = !!score->ifa; | |
1023 | break; | |
1024 | case IPV6_SADDR_RULE_LOCAL: | |
1025 | /* Rule 1: Prefer same address */ | |
1026 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1027 | break; | |
1028 | case IPV6_SADDR_RULE_SCOPE: | |
1029 | /* Rule 2: Prefer appropriate scope | |
1030 | * | |
1031 | * ret | |
1032 | * ^ | |
1033 | * -1 | d 15 | |
1034 | * ---+--+-+---> scope | |
1035 | * | | |
1036 | * | d is scope of the destination. | |
1037 | * B-d | \ | |
1038 | * | \ <- smaller scope is better if | |
1039 | * B-15 | \ if scope is enough for destinaion. | |
1040 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1041 | * d-C-1 | / | |
1042 | * |/ <- greater is better | |
1043 | * -C / if scope is not enough for destination. | |
1044 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1045 | * | |
1046 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1047 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1048 | * Assume B = 0 and we get C > 29. | |
1049 | */ | |
1050 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1051 | if (ret >= dst->scope) | |
1052 | ret = -ret; | |
1053 | else | |
1054 | ret -= 128; /* 30 is enough */ | |
1055 | score->scopedist = ret; | |
1056 | break; | |
1057 | case IPV6_SADDR_RULE_PREFERRED: | |
1058 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1059 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1060 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1061 | break; | |
1062 | #ifdef CONFIG_IPV6_MIP6 | |
1063 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1064 | { |
a9b05723 | 1065 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1066 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1067 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1068 | break; |
7cbca67c | 1069 | } |
a9b05723 YH |
1070 | #endif |
1071 | case IPV6_SADDR_RULE_OIF: | |
1072 | /* Rule 5: Prefer outgoing interface */ | |
1073 | ret = (!dst->ifindex || | |
1074 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1075 | break; | |
1076 | case IPV6_SADDR_RULE_LABEL: | |
1077 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1078 | ret = ipv6_addr_label(net, |
1079 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1080 | score->ifa->idev->dev->ifindex) == dst->label; |
1081 | break; | |
1082 | #ifdef CONFIG_IPV6_PRIVACY | |
1083 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1084 | { |
a9b05723 YH |
1085 | /* Rule 7: Prefer public address |
1086 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1087 | */ | |
7cbca67c YH |
1088 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1089 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1090 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1091 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1092 | break; |
7cbca67c | 1093 | } |
a9b05723 YH |
1094 | #endif |
1095 | case IPV6_SADDR_RULE_ORCHID: | |
1096 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1097 | * non-ORCHID vs non-ORCHID | |
1098 | */ | |
1099 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1100 | ipv6_addr_orchid(dst->addr)); | |
1101 | break; | |
1102 | case IPV6_SADDR_RULE_PREFIX: | |
1103 | /* Rule 8: Use longest matching prefix */ | |
1104 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1105 | dst->addr); | |
1106 | break; | |
1107 | default: | |
1108 | ret = 0; | |
1109 | } | |
1110 | ||
1111 | if (ret) | |
1112 | __set_bit(i, score->scorebits); | |
1113 | score->rule = i; | |
1114 | out: | |
1115 | return ret; | |
1116 | } | |
1117 | ||
191cd582 | 1118 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1119 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1120 | struct in6_addr *saddr) |
1da177e4 | 1121 | { |
a9b05723 YH |
1122 | struct ipv6_saddr_score scores[2], |
1123 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1124 | struct ipv6_saddr_dst dst; |
072047e4 | 1125 | struct net_device *dev; |
a9b05723 | 1126 | int dst_type; |
1da177e4 | 1127 | |
a9b05723 YH |
1128 | dst_type = __ipv6_addr_type(daddr); |
1129 | dst.addr = daddr; | |
1130 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1131 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1132 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1133 | dst.prefs = prefs; |
a9b05723 YH |
1134 | |
1135 | hiscore->rule = -1; | |
1136 | hiscore->ifa = NULL; | |
1da177e4 | 1137 | |
072047e4 | 1138 | read_lock(&dev_base_lock); |
8814c4b5 | 1139 | rcu_read_lock(); |
1da177e4 | 1140 | |
6fda7350 | 1141 | for_each_netdev(net, dev) { |
072047e4 | 1142 | struct inet6_dev *idev; |
072047e4 | 1143 | |
a9b05723 | 1144 | /* Candidate Source Address (section 4) |
072047e4 YH |
1145 | * - multicast and link-local destination address, |
1146 | * the set of candidate source address MUST only | |
1147 | * include addresses assigned to interfaces | |
1148 | * belonging to the same link as the outgoing | |
1149 | * interface. | |
1150 | * (- For site-local destination addresses, the | |
1151 | * set of candidate source addresses MUST only | |
1152 | * include addresses assigned to interfaces | |
1153 | * belonging to the same site as the outgoing | |
1154 | * interface.) | |
1155 | */ | |
a9b05723 YH |
1156 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1157 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1158 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1159 | continue; |
1da177e4 | 1160 | |
1da177e4 | 1161 | idev = __in6_dev_get(dev); |
072047e4 YH |
1162 | if (!idev) |
1163 | continue; | |
1164 | ||
1165 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1166 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1167 | int i; | |
072047e4 | 1168 | |
a9b05723 | 1169 | /* |
6b3ae80a YH |
1170 | * - Tentative Address (RFC2462 section 5.4) |
1171 | * - A tentative address is not considered | |
1172 | * "assigned to an interface" in the traditional | |
95c385b4 | 1173 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1174 | * - Candidate Source Address (section 4) |
072047e4 YH |
1175 | * - In any case, anycast addresses, multicast |
1176 | * addresses, and the unspecified address MUST | |
1177 | * NOT be included in a candidate set. | |
1178 | */ | |
a9b05723 YH |
1179 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1180 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1181 | continue; |
a9b05723 YH |
1182 | |
1183 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1184 | ||
1185 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1186 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1187 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1188 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1189 | "assigned as unicast address on %s", |
1190 | dev->name); | |
1191 | continue; | |
1192 | } | |
1193 | ||
a9b05723 YH |
1194 | score->rule = -1; |
1195 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1196 | ||
1197 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1198 | int minihiscore, miniscore; | |
1199 | ||
3de23255 BT |
1200 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1201 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1202 | |
1203 | if (minihiscore > miniscore) { | |
1204 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1205 | score->scopedist > 0) { | |
1206 | /* | |
1207 | * special case: | |
1208 | * each remaining entry | |
1209 | * has too small (not enough) | |
1210 | * scope, because ifa entries | |
1211 | * are sorted by their scope | |
1212 | * values. | |
1213 | */ | |
1214 | goto try_nextdev; | |
1215 | } | |
1216 | break; | |
1217 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1218 | if (hiscore->ifa) |
1219 | in6_ifa_put(hiscore->ifa); | |
1220 | ||
1221 | in6_ifa_hold(score->ifa); | |
1222 | ||
a0bffffc | 1223 | swap(hiscore, score); |
a9b05723 YH |
1224 | |
1225 | /* restore our iterator */ | |
1226 | score->ifa = hiscore->ifa; | |
1227 | ||
1228 | break; | |
1da177e4 | 1229 | } |
072047e4 | 1230 | } |
1da177e4 | 1231 | } |
a9b05723 | 1232 | try_nextdev: |
072047e4 | 1233 | read_unlock_bh(&idev->lock); |
1da177e4 | 1234 | } |
8814c4b5 | 1235 | rcu_read_unlock(); |
1da177e4 LT |
1236 | read_unlock(&dev_base_lock); |
1237 | ||
a9b05723 | 1238 | if (!hiscore->ifa) |
072047e4 | 1239 | return -EADDRNOTAVAIL; |
1ab1457c | 1240 | |
a9b05723 YH |
1241 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1242 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1243 | return 0; |
1da177e4 LT |
1244 | } |
1245 | ||
5e5f3f0f | 1246 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1247 | |
95c385b4 NH |
1248 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1249 | unsigned char banned_flags) | |
1da177e4 LT |
1250 | { |
1251 | struct inet6_dev *idev; | |
1252 | int err = -EADDRNOTAVAIL; | |
1253 | ||
8814c4b5 | 1254 | rcu_read_lock(); |
1da177e4 LT |
1255 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1256 | struct inet6_ifaddr *ifp; | |
1257 | ||
1258 | read_lock_bh(&idev->lock); | |
1259 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1260 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1261 | ipv6_addr_copy(addr, &ifp->addr); |
1262 | err = 0; | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | read_unlock_bh(&idev->lock); | |
1267 | } | |
8814c4b5 | 1268 | rcu_read_unlock(); |
1da177e4 LT |
1269 | return err; |
1270 | } | |
1271 | ||
1272 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1273 | { | |
1274 | int cnt = 0; | |
1275 | struct inet6_ifaddr *ifp; | |
1276 | ||
1277 | read_lock_bh(&idev->lock); | |
1278 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1279 | cnt++; | |
1280 | read_unlock_bh(&idev->lock); | |
1281 | return cnt; | |
1282 | } | |
1283 | ||
bfeade08 DL |
1284 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1285 | struct net_device *dev, int strict) | |
1da177e4 LT |
1286 | { |
1287 | struct inet6_ifaddr * ifp; | |
1288 | u8 hash = ipv6_addr_hash(addr); | |
1289 | ||
1290 | read_lock_bh(&addrconf_hash_lock); | |
1291 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1292 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1293 | continue; |
1da177e4 LT |
1294 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1295 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1296 | if (dev == NULL || ifp->idev->dev == dev || | |
1297 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1298 | break; | |
1299 | } | |
1300 | } | |
1301 | read_unlock_bh(&addrconf_hash_lock); | |
1302 | return ifp != NULL; | |
1303 | } | |
7159039a YH |
1304 | EXPORT_SYMBOL(ipv6_chk_addr); |
1305 | ||
1da177e4 | 1306 | static |
06bfe655 DL |
1307 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1308 | struct net_device *dev) | |
1da177e4 LT |
1309 | { |
1310 | struct inet6_ifaddr * ifp; | |
1311 | u8 hash = ipv6_addr_hash(addr); | |
1312 | ||
1313 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1314 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1315 | continue; |
1da177e4 LT |
1316 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1317 | if (dev == NULL || ifp->idev->dev == dev) | |
1318 | break; | |
1319 | } | |
1320 | } | |
1321 | return ifp != NULL; | |
1322 | } | |
1323 | ||
52eeeb84 YH |
1324 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1325 | { | |
1326 | struct inet6_dev *idev; | |
1327 | struct inet6_ifaddr *ifa; | |
1328 | int onlink; | |
1329 | ||
1330 | onlink = 0; | |
1331 | rcu_read_lock(); | |
1332 | idev = __in6_dev_get(dev); | |
1333 | if (idev) { | |
1334 | read_lock_bh(&idev->lock); | |
1335 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
1336 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
1337 | ifa->prefix_len); | |
1338 | if (onlink) | |
1339 | break; | |
1340 | } | |
1341 | read_unlock_bh(&idev->lock); | |
1342 | } | |
1343 | rcu_read_unlock(); | |
1344 | return onlink; | |
1345 | } | |
1346 | ||
1347 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1348 | ||
9acd9f3a | 1349 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1350 | struct net_device *dev, int strict) |
1da177e4 LT |
1351 | { |
1352 | struct inet6_ifaddr * ifp; | |
1353 | u8 hash = ipv6_addr_hash(addr); | |
1354 | ||
1355 | read_lock_bh(&addrconf_hash_lock); | |
1356 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1357 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1358 | continue; |
1da177e4 LT |
1359 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1360 | if (dev == NULL || ifp->idev->dev == dev || | |
1361 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1362 | in6_ifa_hold(ifp); | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | read_unlock_bh(&addrconf_hash_lock); | |
1368 | ||
1369 | return ifp; | |
1370 | } | |
1371 | ||
1da177e4 LT |
1372 | /* Gets referenced address, destroys ifaddr */ |
1373 | ||
cc411d0b | 1374 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1375 | { |
1da177e4 LT |
1376 | if (ifp->flags&IFA_F_PERMANENT) { |
1377 | spin_lock_bh(&ifp->lock); | |
1378 | addrconf_del_timer(ifp); | |
1379 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1380 | if (dad_failed) |
1381 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 LT |
1382 | spin_unlock_bh(&ifp->lock); |
1383 | in6_ifa_put(ifp); | |
1384 | #ifdef CONFIG_IPV6_PRIVACY | |
1385 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1386 | struct inet6_ifaddr *ifpub; | |
1387 | spin_lock_bh(&ifp->lock); | |
1388 | ifpub = ifp->ifpub; | |
1389 | if (ifpub) { | |
1390 | in6_ifa_hold(ifpub); | |
1391 | spin_unlock_bh(&ifp->lock); | |
1392 | ipv6_create_tempaddr(ifpub, ifp); | |
1393 | in6_ifa_put(ifpub); | |
1394 | } else { | |
1395 | spin_unlock_bh(&ifp->lock); | |
1396 | } | |
1397 | ipv6_del_addr(ifp); | |
1398 | #endif | |
1399 | } else | |
1400 | ipv6_del_addr(ifp); | |
1401 | } | |
1402 | ||
3c21edbd YH |
1403 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1404 | { | |
1b34be74 | 1405 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 BH |
1406 | |
1407 | if (net_ratelimit()) | |
1408 | printk(KERN_INFO "%s: IPv6 duplicate address detected!\n", | |
1409 | ifp->idev->dev->name); | |
1410 | ||
1b34be74 YH |
1411 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1412 | struct in6_addr addr; | |
1413 | ||
1414 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1415 | addr.s6_addr32[1] = 0; | |
1416 | ||
1417 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1418 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1419 | /* DAD failed for link-local based on MAC address */ | |
1420 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 BH |
1421 | |
1422 | printk(KERN_INFO "%s: IPv6 being disabled!\n", | |
1423 | ifp->idev->dev->name); | |
1b34be74 YH |
1424 | } |
1425 | } | |
1426 | ||
cc411d0b | 1427 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1428 | } |
1da177e4 LT |
1429 | |
1430 | /* Join to solicited addr multicast group. */ | |
1431 | ||
1432 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1433 | { | |
1434 | struct in6_addr maddr; | |
1435 | ||
1436 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1437 | return; | |
1438 | ||
1439 | addrconf_addr_solict_mult(addr, &maddr); | |
1440 | ipv6_dev_mc_inc(dev, &maddr); | |
1441 | } | |
1442 | ||
1443 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1444 | { | |
1445 | struct in6_addr maddr; | |
1446 | ||
1447 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1448 | return; | |
1449 | ||
1450 | addrconf_addr_solict_mult(addr, &maddr); | |
1451 | __ipv6_dev_mc_dec(idev, &maddr); | |
1452 | } | |
1453 | ||
20380731 | 1454 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1455 | { |
1456 | struct in6_addr addr; | |
1457 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1458 | if (ipv6_addr_any(&addr)) | |
1459 | return; | |
1460 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1461 | } | |
1462 | ||
20380731 | 1463 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1464 | { |
1465 | struct in6_addr addr; | |
1466 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1467 | if (ipv6_addr_any(&addr)) | |
1468 | return; | |
1469 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1470 | } | |
1471 | ||
073a8e0e YH |
1472 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1473 | { | |
1474 | if (dev->addr_len != ETH_ALEN) | |
1475 | return -1; | |
1476 | memcpy(eui, dev->dev_addr, 3); | |
1477 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1478 | ||
1479 | /* | |
1480 | * The zSeries OSA network cards can be shared among various | |
1481 | * OS instances, but the OSA cards have only one MAC address. | |
1482 | * This leads to duplicate address conflicts in conjunction | |
1483 | * with IPv6 if more than one instance uses the same card. | |
1484 | * | |
1485 | * The driver for these cards can deliver a unique 16-bit | |
1486 | * identifier for each instance sharing the same card. It is | |
1487 | * placed instead of 0xFFFE in the interface identifier. The | |
1488 | * "u" bit of the interface identifier is not inverted in this | |
1489 | * case. Hence the resulting interface identifier has local | |
1490 | * scope according to RFC2373. | |
1491 | */ | |
1492 | if (dev->dev_id) { | |
1493 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1494 | eui[4] = dev->dev_id & 0xFF; | |
1495 | } else { | |
1496 | eui[3] = 0xFF; | |
1497 | eui[4] = 0xFE; | |
1498 | eui[0] ^= 2; | |
1499 | } | |
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1504 | { | |
1505 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1506 | if (dev->addr_len != ARCNET_ALEN) | |
1507 | return -1; | |
1508 | memset(eui, 0, 7); | |
1509 | eui[7] = *(u8*)dev->dev_addr; | |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1514 | { | |
1515 | if (dev->addr_len != INFINIBAND_ALEN) | |
1516 | return -1; | |
1517 | memcpy(eui, dev->dev_addr + 12, 8); | |
1518 | eui[0] |= 2; | |
1519 | return 0; | |
1520 | } | |
1521 | ||
dfd982ba YH |
1522 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1523 | { | |
9af28511 SH |
1524 | if (addr == 0) |
1525 | return -1; | |
dfd982ba YH |
1526 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1527 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1528 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1529 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1530 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1531 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1532 | eui[1] = 0; | |
1533 | eui[2] = 0x5E; | |
1534 | eui[3] = 0xFE; | |
1535 | memcpy(eui + 4, &addr, 4); | |
1536 | return 0; | |
1537 | } | |
1538 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1539 | ||
1540 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1541 | { | |
1542 | if (dev->priv_flags & IFF_ISATAP) | |
1543 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1544 | return -1; | |
1545 | } | |
1546 | ||
1da177e4 LT |
1547 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1548 | { | |
1549 | switch (dev->type) { | |
1550 | case ARPHRD_ETHER: | |
1551 | case ARPHRD_FDDI: | |
1552 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1553 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1554 | case ARPHRD_ARCNET: |
073a8e0e | 1555 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1556 | case ARPHRD_INFINIBAND: |
073a8e0e | 1557 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1558 | case ARPHRD_SIT: |
dfd982ba | 1559 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1560 | } |
1561 | return -1; | |
1562 | } | |
1563 | ||
1564 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1565 | { | |
1566 | int err = -1; | |
1567 | struct inet6_ifaddr *ifp; | |
1568 | ||
1569 | read_lock_bh(&idev->lock); | |
1570 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1571 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1572 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1573 | err = 0; | |
1574 | break; | |
1575 | } | |
1576 | } | |
1577 | read_unlock_bh(&idev->lock); | |
1578 | return err; | |
1579 | } | |
1580 | ||
1581 | #ifdef CONFIG_IPV6_PRIVACY | |
1582 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1583 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1584 | { | |
1da177e4 | 1585 | regen: |
955189ef | 1586 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1587 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1588 | |
1589 | /* | |
1590 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1591 | * check if generated address is not inappropriate | |
1592 | * | |
1593 | * - Reserved subnet anycast (RFC 2526) | |
1594 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1595 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1596 | * 00-00-5E-FE-xx-xx-xx-xx |
1597 | * - value 0 | |
1598 | * - XXX: already assigned to an address on the device | |
1599 | */ | |
1ab1457c | 1600 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1601 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1602 | (idev->rndid[7]&0x80)) | |
1603 | goto regen; | |
1604 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1605 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1606 | goto regen; | |
1607 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1608 | goto regen; | |
1609 | } | |
1610 | ||
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static void ipv6_regen_rndid(unsigned long data) | |
1615 | { | |
1616 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1617 | unsigned long expires; | |
1618 | ||
8814c4b5 | 1619 | rcu_read_lock_bh(); |
1da177e4 LT |
1620 | write_lock_bh(&idev->lock); |
1621 | ||
1622 | if (idev->dead) | |
1623 | goto out; | |
1624 | ||
1625 | if (__ipv6_regen_rndid(idev) < 0) | |
1626 | goto out; | |
1ab1457c | 1627 | |
1da177e4 | 1628 | expires = jiffies + |
1ab1457c | 1629 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1630 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1631 | if (time_before(expires, jiffies)) { | |
1632 | printk(KERN_WARNING | |
1633 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1634 | idev->dev->name); | |
1635 | goto out; | |
1636 | } | |
1637 | ||
1638 | if (!mod_timer(&idev->regen_timer, expires)) | |
1639 | in6_dev_hold(idev); | |
1640 | ||
1641 | out: | |
1642 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1643 | rcu_read_unlock_bh(); |
1da177e4 LT |
1644 | in6_dev_put(idev); |
1645 | } | |
1646 | ||
1647 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1648 | int ret = 0; | |
1649 | ||
1650 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1651 | ret = __ipv6_regen_rndid(idev); | |
1652 | return ret; | |
1653 | } | |
1654 | #endif | |
1655 | ||
1656 | /* | |
1657 | * Add prefix route. | |
1658 | */ | |
1659 | ||
1660 | static void | |
1661 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1662 | unsigned long expires, u32 flags) |
1da177e4 | 1663 | { |
86872cb5 TG |
1664 | struct fib6_config cfg = { |
1665 | .fc_table = RT6_TABLE_PREFIX, | |
1666 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1667 | .fc_ifindex = dev->ifindex, | |
1668 | .fc_expires = expires, | |
1669 | .fc_dst_len = plen, | |
1670 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1671 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1672 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1673 | }; |
1da177e4 | 1674 | |
86872cb5 | 1675 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1676 | |
1677 | /* Prevent useless cloning on PtP SIT. | |
1678 | This thing is done here expecting that the whole | |
1679 | class of non-broadcast devices need not cloning. | |
1680 | */ | |
0be669bb | 1681 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1682 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1683 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1684 | #endif |
1da177e4 | 1685 | |
86872cb5 | 1686 | ip6_route_add(&cfg); |
1da177e4 LT |
1687 | } |
1688 | ||
1689 | /* Create "default" multicast route to the interface */ | |
1690 | ||
1691 | static void addrconf_add_mroute(struct net_device *dev) | |
1692 | { | |
86872cb5 TG |
1693 | struct fib6_config cfg = { |
1694 | .fc_table = RT6_TABLE_LOCAL, | |
1695 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1696 | .fc_ifindex = dev->ifindex, | |
1697 | .fc_dst_len = 8, | |
1698 | .fc_flags = RTF_UP, | |
c346dca1 | 1699 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1700 | }; |
1701 | ||
1702 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1703 | ||
1704 | ip6_route_add(&cfg); | |
1da177e4 LT |
1705 | } |
1706 | ||
0be669bb | 1707 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1708 | static void sit_route_add(struct net_device *dev) |
1709 | { | |
86872cb5 TG |
1710 | struct fib6_config cfg = { |
1711 | .fc_table = RT6_TABLE_MAIN, | |
1712 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1713 | .fc_ifindex = dev->ifindex, | |
1714 | .fc_dst_len = 96, | |
1715 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1716 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1717 | }; |
1da177e4 LT |
1718 | |
1719 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1720 | ip6_route_add(&cfg); |
1da177e4 | 1721 | } |
0be669bb | 1722 | #endif |
1da177e4 LT |
1723 | |
1724 | static void addrconf_add_lroute(struct net_device *dev) | |
1725 | { | |
1726 | struct in6_addr addr; | |
1727 | ||
1728 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1729 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1730 | } | |
1731 | ||
1732 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1733 | { | |
1734 | struct inet6_dev *idev; | |
1735 | ||
1736 | ASSERT_RTNL(); | |
1737 | ||
1738 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1739 | return NULL; | |
1740 | ||
1741 | /* Add default multicast route */ | |
1742 | addrconf_add_mroute(dev); | |
1743 | ||
1744 | /* Add link local route */ | |
1745 | addrconf_add_lroute(dev); | |
1746 | return idev; | |
1747 | } | |
1748 | ||
1749 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1750 | { | |
1751 | struct prefix_info *pinfo; | |
1752 | __u32 valid_lft; | |
1753 | __u32 prefered_lft; | |
1754 | int addr_type; | |
1da177e4 | 1755 | struct inet6_dev *in6_dev; |
56d417b1 | 1756 | struct net *net = dev_net(dev); |
1da177e4 LT |
1757 | |
1758 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1759 | |
1da177e4 LT |
1760 | if (len < sizeof(struct prefix_info)) { |
1761 | ADBG(("addrconf: prefix option too short\n")); | |
1762 | return; | |
1763 | } | |
1ab1457c | 1764 | |
1da177e4 LT |
1765 | /* |
1766 | * Validation checks ([ADDRCONF], page 19) | |
1767 | */ | |
1768 | ||
1769 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1770 | ||
1771 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1772 | return; | |
1773 | ||
1774 | valid_lft = ntohl(pinfo->valid); | |
1775 | prefered_lft = ntohl(pinfo->prefered); | |
1776 | ||
1777 | if (prefered_lft > valid_lft) { | |
1778 | if (net_ratelimit()) | |
1779 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1780 | return; | |
1781 | } | |
1782 | ||
1783 | in6_dev = in6_dev_get(dev); | |
1784 | ||
1785 | if (in6_dev == NULL) { | |
1786 | if (net_ratelimit()) | |
1787 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1788 | return; | |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Two things going on here: | |
1793 | * 1) Add routes for on-link prefixes | |
1794 | * 2) Configure prefixes with the auto flag set | |
1795 | */ | |
1796 | ||
4bed72e4 YH |
1797 | if (pinfo->onlink) { |
1798 | struct rt6_info *rt; | |
1799 | unsigned long rt_expires; | |
1800 | ||
6f704992 YH |
1801 | /* Avoid arithmetic overflow. Really, we could |
1802 | * save rt_expires in seconds, likely valid_lft, | |
1803 | * but it would require division in fib gc, that it | |
1804 | * not good. | |
1805 | */ | |
4bed72e4 YH |
1806 | if (HZ > USER_HZ) |
1807 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1808 | else | |
1809 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1810 | |
4bed72e4 YH |
1811 | if (addrconf_finite_timeout(rt_expires)) |
1812 | rt_expires *= HZ; | |
1da177e4 | 1813 | |
56d417b1 | 1814 | rt = rt6_lookup(net, &pinfo->prefix, NULL, |
6fda7350 | 1815 | dev->ifindex, 1); |
1da177e4 | 1816 | |
2b5ead46 | 1817 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1818 | /* Autoconf prefix route */ |
1819 | if (valid_lft == 0) { | |
1820 | ip6_del_rt(rt); | |
1821 | rt = NULL; | |
4bed72e4 | 1822 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1823 | /* not infinity */ |
1824 | rt->rt6i_expires = jiffies + rt_expires; | |
1825 | rt->rt6i_flags |= RTF_EXPIRES; | |
1826 | } else { | |
1827 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1828 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1829 | } |
1830 | } else if (valid_lft) { | |
6f704992 | 1831 | clock_t expires = 0; |
4bed72e4 YH |
1832 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1833 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1834 | /* not infinity */ |
1835 | flags |= RTF_EXPIRES; | |
1836 | expires = jiffies_to_clock_t(rt_expires); | |
1837 | } | |
1da177e4 | 1838 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1839 | dev, expires, flags); |
1da177e4 LT |
1840 | } |
1841 | if (rt) | |
1842 | dst_release(&rt->u.dst); | |
1843 | } | |
1844 | ||
1845 | /* Try to figure out our local address for this prefix */ | |
1846 | ||
1847 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1848 | struct inet6_ifaddr * ifp; | |
1849 | struct in6_addr addr; | |
1850 | int create = 0, update_lft = 0; | |
1851 | ||
1852 | if (pinfo->prefix_len == 64) { | |
1853 | memcpy(&addr, &pinfo->prefix, 8); | |
1854 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1855 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1856 | in6_dev_put(in6_dev); | |
1857 | return; | |
1858 | } | |
1859 | goto ok; | |
1860 | } | |
1861 | if (net_ratelimit()) | |
1862 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1863 | pinfo->prefix_len); | |
1864 | in6_dev_put(in6_dev); | |
1865 | return; | |
1866 | ||
1867 | ok: | |
1868 | ||
53b7997f | 1869 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1870 | |
1871 | if (ifp == NULL && valid_lft) { | |
1872 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1873 | u32 addr_flags = 0; |
1874 | ||
1875 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1876 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1877 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1878 | addr_flags = IFA_F_OPTIMISTIC; |
1879 | #endif | |
1da177e4 LT |
1880 | |
1881 | /* Do not allow to create too much of autoconfigured | |
1882 | * addresses; this would be too easy way to crash kernel. | |
1883 | */ | |
1884 | if (!max_addresses || | |
1885 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1886 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1887 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1888 | addr_flags); | |
1da177e4 LT |
1889 | |
1890 | if (!ifp || IS_ERR(ifp)) { | |
1891 | in6_dev_put(in6_dev); | |
1892 | return; | |
1893 | } | |
1894 | ||
1895 | update_lft = create = 1; | |
1896 | ifp->cstamp = jiffies; | |
1897 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1898 | } | |
1899 | ||
1900 | if (ifp) { | |
1901 | int flags; | |
1902 | unsigned long now; | |
1903 | #ifdef CONFIG_IPV6_PRIVACY | |
1904 | struct inet6_ifaddr *ift; | |
1905 | #endif | |
1906 | u32 stored_lft; | |
1907 | ||
1908 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1909 | spin_lock(&ifp->lock); | |
1910 | now = jiffies; | |
1911 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1912 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1913 | else | |
1914 | stored_lft = 0; | |
1915 | if (!update_lft && stored_lft) { | |
1916 | if (valid_lft > MIN_VALID_LIFETIME || | |
1917 | valid_lft > stored_lft) | |
1918 | update_lft = 1; | |
1919 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1920 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1921 | /* |
1922 | * RFC 4862 Section 5.5.3e: | |
1923 | * "Note that the preferred lifetime of | |
1924 | * the corresponding address is always | |
1925 | * reset to the Preferred Lifetime in | |
1926 | * the received Prefix Information | |
1927 | * option, regardless of whether the | |
1928 | * valid lifetime is also reset or | |
1929 | * ignored." | |
1930 | * | |
1931 | * So if the preferred lifetime in | |
1932 | * this advertisement is different | |
1933 | * than what we have stored, but the | |
1934 | * valid lifetime is invalid, just | |
1935 | * reset prefered_lft. | |
1936 | * | |
1937 | * We must set the valid lifetime | |
1938 | * to the stored lifetime since we'll | |
1939 | * be updating the timestamp below, | |
1940 | * else we'll set it back to the | |
1941 | * minumum. | |
1942 | */ | |
1943 | if (prefered_lft != ifp->prefered_lft) { | |
1944 | valid_lft = stored_lft; | |
1945 | update_lft = 1; | |
1946 | } | |
1da177e4 LT |
1947 | } else { |
1948 | valid_lft = MIN_VALID_LIFETIME; | |
1949 | if (valid_lft < prefered_lft) | |
1950 | prefered_lft = valid_lft; | |
1951 | update_lft = 1; | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | if (update_lft) { | |
1956 | ifp->valid_lft = valid_lft; | |
1957 | ifp->prefered_lft = prefered_lft; | |
1958 | ifp->tstamp = now; | |
1959 | flags = ifp->flags; | |
1960 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1961 | spin_unlock(&ifp->lock); | |
1962 | ||
1963 | if (!(flags&IFA_F_TENTATIVE)) | |
1964 | ipv6_ifa_notify(0, ifp); | |
1965 | } else | |
1966 | spin_unlock(&ifp->lock); | |
1967 | ||
1968 | #ifdef CONFIG_IPV6_PRIVACY | |
1969 | read_lock_bh(&in6_dev->lock); | |
1970 | /* update all temporary addresses in the list */ | |
1971 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1972 | /* | |
1973 | * When adjusting the lifetimes of an existing | |
1974 | * temporary address, only lower the lifetimes. | |
1975 | * Implementations must not increase the | |
1976 | * lifetimes of an existing temporary address | |
1977 | * when processing a Prefix Information Option. | |
1978 | */ | |
c6fbfac2 BB |
1979 | if (ifp != ift->ifpub) |
1980 | continue; | |
1981 | ||
1da177e4 LT |
1982 | spin_lock(&ift->lock); |
1983 | flags = ift->flags; | |
1984 | if (ift->valid_lft > valid_lft && | |
1985 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1986 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1987 | if (ift->prefered_lft > prefered_lft && | |
1988 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1989 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1990 | spin_unlock(&ift->lock); | |
1991 | if (!(flags&IFA_F_TENTATIVE)) | |
1992 | ipv6_ifa_notify(0, ift); | |
1993 | } | |
1994 | ||
1995 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1996 | /* | |
1997 | * When a new public address is created as described in [ADDRCONF], | |
1998 | * also create a new temporary address. | |
1999 | */ | |
1ab1457c | 2000 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2001 | ipv6_create_tempaddr(ifp, NULL); |
2002 | } else { | |
2003 | read_unlock_bh(&in6_dev->lock); | |
2004 | } | |
2005 | #endif | |
2006 | in6_ifa_put(ifp); | |
2007 | addrconf_verify(0); | |
2008 | } | |
2009 | } | |
2010 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2011 | in6_dev_put(in6_dev); | |
2012 | } | |
2013 | ||
2014 | /* | |
2015 | * Set destination address. | |
2016 | * Special case for SIT interfaces where we create a new "virtual" | |
2017 | * device. | |
2018 | */ | |
af284937 | 2019 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2020 | { |
2021 | struct in6_ifreq ireq; | |
2022 | struct net_device *dev; | |
2023 | int err = -EINVAL; | |
2024 | ||
2025 | rtnl_lock(); | |
2026 | ||
2027 | err = -EFAULT; | |
2028 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2029 | goto err_exit; | |
2030 | ||
af284937 | 2031 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2032 | |
2033 | err = -ENODEV; | |
2034 | if (dev == NULL) | |
2035 | goto err_exit; | |
2036 | ||
0be669bb | 2037 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2038 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2039 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2040 | struct ifreq ifr; |
1da177e4 LT |
2041 | struct ip_tunnel_parm p; |
2042 | ||
2043 | err = -EADDRNOTAVAIL; | |
2044 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2045 | goto err_exit; | |
2046 | ||
2047 | memset(&p, 0, sizeof(p)); | |
2048 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2049 | p.iph.saddr = 0; | |
2050 | p.iph.version = 4; | |
2051 | p.iph.ihl = 5; | |
2052 | p.iph.protocol = IPPROTO_IPV6; | |
2053 | p.iph.ttl = 64; | |
d20b3109 | 2054 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2055 | |
5bc3eb7e SH |
2056 | if (ops->ndo_do_ioctl) { |
2057 | mm_segment_t oldfs = get_fs(); | |
2058 | ||
2059 | set_fs(KERNEL_DS); | |
2060 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2061 | set_fs(oldfs); | |
2062 | } else | |
2063 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2064 | |
2065 | if (err == 0) { | |
2066 | err = -ENOBUFS; | |
af284937 DL |
2067 | dev = __dev_get_by_name(net, p.name); |
2068 | if (!dev) | |
1da177e4 LT |
2069 | goto err_exit; |
2070 | err = dev_open(dev); | |
2071 | } | |
2072 | } | |
0be669bb | 2073 | #endif |
1da177e4 LT |
2074 | |
2075 | err_exit: | |
2076 | rtnl_unlock(); | |
2077 | return err; | |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | * Manual configuration of address on an interface | |
2082 | */ | |
af284937 | 2083 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2084 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2085 | __u32 valid_lft) |
1da177e4 LT |
2086 | { |
2087 | struct inet6_ifaddr *ifp; | |
2088 | struct inet6_dev *idev; | |
2089 | struct net_device *dev; | |
2090 | int scope; | |
6f704992 YH |
2091 | u32 flags; |
2092 | clock_t expires; | |
4bed72e4 | 2093 | unsigned long timeout; |
1da177e4 LT |
2094 | |
2095 | ASSERT_RTNL(); | |
1ab1457c | 2096 | |
24ef0da7 TG |
2097 | if (plen > 128) |
2098 | return -EINVAL; | |
2099 | ||
0778769d NT |
2100 | /* check the lifetime */ |
2101 | if (!valid_lft || prefered_lft > valid_lft) | |
2102 | return -EINVAL; | |
2103 | ||
af284937 DL |
2104 | dev = __dev_get_by_index(net, ifindex); |
2105 | if (!dev) | |
1da177e4 | 2106 | return -ENODEV; |
1ab1457c | 2107 | |
1da177e4 LT |
2108 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2109 | return -ENOBUFS; | |
2110 | ||
2111 | scope = ipv6_addr_scope(pfx); | |
2112 | ||
4bed72e4 YH |
2113 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2114 | if (addrconf_finite_timeout(timeout)) { | |
2115 | expires = jiffies_to_clock_t(timeout * HZ); | |
2116 | valid_lft = timeout; | |
6f704992 | 2117 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2118 | } else { |
2119 | expires = 0; | |
2120 | flags = 0; | |
2121 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2122 | } |
0778769d | 2123 | |
4bed72e4 YH |
2124 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2125 | if (addrconf_finite_timeout(timeout)) { | |
2126 | if (timeout == 0) | |
2127 | ifa_flags |= IFA_F_DEPRECATED; | |
2128 | prefered_lft = timeout; | |
2129 | } | |
0778769d NT |
2130 | |
2131 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2132 | ||
1da177e4 | 2133 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2134 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2135 | ifp->valid_lft = valid_lft; |
2136 | ifp->prefered_lft = prefered_lft; | |
2137 | ifp->tstamp = jiffies; | |
06aebfb7 | 2138 | spin_unlock_bh(&ifp->lock); |
0778769d | 2139 | |
46d48046 | 2140 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2141 | expires, flags); |
95c385b4 NH |
2142 | /* |
2143 | * Note that section 3.1 of RFC 4429 indicates | |
2144 | * that the Optimistic flag should not be set for | |
2145 | * manually configured addresses | |
2146 | */ | |
1da177e4 LT |
2147 | addrconf_dad_start(ifp, 0); |
2148 | in6_ifa_put(ifp); | |
0778769d | 2149 | addrconf_verify(0); |
1da177e4 LT |
2150 | return 0; |
2151 | } | |
2152 | ||
2153 | return PTR_ERR(ifp); | |
2154 | } | |
2155 | ||
af284937 | 2156 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2157 | unsigned int plen) |
1da177e4 LT |
2158 | { |
2159 | struct inet6_ifaddr *ifp; | |
2160 | struct inet6_dev *idev; | |
2161 | struct net_device *dev; | |
1ab1457c | 2162 | |
24ef0da7 TG |
2163 | if (plen > 128) |
2164 | return -EINVAL; | |
2165 | ||
af284937 DL |
2166 | dev = __dev_get_by_index(net, ifindex); |
2167 | if (!dev) | |
1da177e4 LT |
2168 | return -ENODEV; |
2169 | ||
2170 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2171 | return -ENXIO; | |
2172 | ||
2173 | read_lock_bh(&idev->lock); | |
2174 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2175 | if (ifp->prefix_len == plen && | |
2176 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2177 | in6_ifa_hold(ifp); | |
2178 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2179 | |
1da177e4 LT |
2180 | ipv6_del_addr(ifp); |
2181 | ||
2182 | /* If the last address is deleted administratively, | |
2183 | disable IPv6 on this interface. | |
2184 | */ | |
2185 | if (idev->addr_list == NULL) | |
2186 | addrconf_ifdown(idev->dev, 1); | |
2187 | return 0; | |
2188 | } | |
2189 | } | |
2190 | read_unlock_bh(&idev->lock); | |
2191 | return -EADDRNOTAVAIL; | |
2192 | } | |
2193 | ||
2194 | ||
af284937 | 2195 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2196 | { |
2197 | struct in6_ifreq ireq; | |
2198 | int err; | |
1ab1457c | 2199 | |
1da177e4 LT |
2200 | if (!capable(CAP_NET_ADMIN)) |
2201 | return -EPERM; | |
1ab1457c | 2202 | |
1da177e4 LT |
2203 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2204 | return -EFAULT; | |
2205 | ||
2206 | rtnl_lock(); | |
af284937 DL |
2207 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2208 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2209 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2210 | rtnl_unlock(); |
2211 | return err; | |
2212 | } | |
2213 | ||
af284937 | 2214 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2215 | { |
2216 | struct in6_ifreq ireq; | |
2217 | int err; | |
1ab1457c | 2218 | |
1da177e4 LT |
2219 | if (!capable(CAP_NET_ADMIN)) |
2220 | return -EPERM; | |
2221 | ||
2222 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2223 | return -EFAULT; | |
2224 | ||
2225 | rtnl_lock(); | |
af284937 DL |
2226 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2227 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2228 | rtnl_unlock(); |
2229 | return err; | |
2230 | } | |
2231 | ||
b5f348e5 IJ |
2232 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2233 | int plen, int scope) | |
2234 | { | |
2235 | struct inet6_ifaddr *ifp; | |
2236 | ||
2237 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2238 | if (!IS_ERR(ifp)) { | |
2239 | spin_lock_bh(&ifp->lock); | |
2240 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2241 | spin_unlock_bh(&ifp->lock); | |
2242 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2243 | in6_ifa_put(ifp); | |
2244 | } | |
2245 | } | |
2246 | ||
0be669bb | 2247 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2248 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2249 | { | |
1da177e4 LT |
2250 | struct in6_addr addr; |
2251 | struct net_device *dev; | |
c346dca1 | 2252 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2253 | int scope; |
2254 | ||
2255 | ASSERT_RTNL(); | |
2256 | ||
2257 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2258 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2259 | ||
2260 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2261 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2262 | scope = IFA_LINK; | |
2263 | } else { | |
2264 | scope = IPV6_ADDR_COMPATv4; | |
2265 | } | |
2266 | ||
2267 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2268 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2269 | return; |
2270 | } | |
2271 | ||
6fda7350 | 2272 | for_each_netdev(net, dev) { |
e5ed6399 | 2273 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2274 | if (in_dev && (dev->flags & IFF_UP)) { |
2275 | struct in_ifaddr * ifa; | |
2276 | ||
2277 | int flag = scope; | |
2278 | ||
2279 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2280 | int plen; | |
2281 | ||
2282 | addr.s6_addr32[3] = ifa->ifa_local; | |
2283 | ||
2284 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2285 | continue; | |
2286 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2287 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2288 | continue; | |
2289 | flag |= IFA_HOST; | |
2290 | } | |
2291 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2292 | plen = 64; | |
2293 | else | |
2294 | plen = 96; | |
2295 | ||
b5f348e5 | 2296 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2297 | } |
2298 | } | |
1ab1457c | 2299 | } |
1da177e4 | 2300 | } |
0be669bb | 2301 | #endif |
1da177e4 LT |
2302 | |
2303 | static void init_loopback(struct net_device *dev) | |
2304 | { | |
2305 | struct inet6_dev *idev; | |
1da177e4 LT |
2306 | |
2307 | /* ::1 */ | |
2308 | ||
2309 | ASSERT_RTNL(); | |
2310 | ||
2311 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2312 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2313 | return; | |
2314 | } | |
2315 | ||
b5f348e5 | 2316 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2317 | } |
2318 | ||
2319 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2320 | { | |
2321 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2322 | u32 addr_flags = IFA_F_PERMANENT; |
2323 | ||
2324 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2325 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2326 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2327 | addr_flags |= IFA_F_OPTIMISTIC; |
2328 | #endif | |
1da177e4 | 2329 | |
95c385b4 NH |
2330 | |
2331 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2332 | if (!IS_ERR(ifp)) { |
46d48046 | 2333 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2334 | addrconf_dad_start(ifp, 0); |
2335 | in6_ifa_put(ifp); | |
2336 | } | |
2337 | } | |
2338 | ||
2339 | static void addrconf_dev_config(struct net_device *dev) | |
2340 | { | |
2341 | struct in6_addr addr; | |
2342 | struct inet6_dev * idev; | |
2343 | ||
2344 | ASSERT_RTNL(); | |
2345 | ||
74235a25 HX |
2346 | if ((dev->type != ARPHRD_ETHER) && |
2347 | (dev->type != ARPHRD_FDDI) && | |
2348 | (dev->type != ARPHRD_IEEE802_TR) && | |
2349 | (dev->type != ARPHRD_ARCNET) && | |
2350 | (dev->type != ARPHRD_INFINIBAND)) { | |
2351 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2352 | return; | |
2353 | } | |
2354 | ||
1da177e4 LT |
2355 | idev = addrconf_add_dev(dev); |
2356 | if (idev == NULL) | |
2357 | return; | |
2358 | ||
2359 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2360 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2361 | ||
2362 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2363 | addrconf_add_linklocal(idev, &addr); | |
2364 | } | |
2365 | ||
0be669bb | 2366 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2367 | static void addrconf_sit_config(struct net_device *dev) |
2368 | { | |
2369 | struct inet6_dev *idev; | |
2370 | ||
2371 | ASSERT_RTNL(); | |
2372 | ||
1ab1457c YH |
2373 | /* |
2374 | * Configure the tunnel with one of our IPv4 | |
2375 | * addresses... we should configure all of | |
1da177e4 LT |
2376 | * our v4 addrs in the tunnel |
2377 | */ | |
2378 | ||
2379 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2380 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2381 | return; | |
2382 | } | |
2383 | ||
c7dc89c0 FT |
2384 | if (dev->priv_flags & IFF_ISATAP) { |
2385 | struct in6_addr addr; | |
2386 | ||
2387 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2388 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2389 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2390 | addrconf_add_linklocal(idev, &addr); | |
2391 | return; | |
2392 | } | |
2393 | ||
1da177e4 LT |
2394 | sit_add_v4_addrs(idev); |
2395 | ||
2396 | if (dev->flags&IFF_POINTOPOINT) { | |
2397 | addrconf_add_mroute(dev); | |
2398 | addrconf_add_lroute(dev); | |
2399 | } else | |
2400 | sit_route_add(dev); | |
2401 | } | |
0be669bb | 2402 | #endif |
1da177e4 LT |
2403 | |
2404 | static inline int | |
2405 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2406 | { | |
2407 | struct in6_addr lladdr; | |
2408 | ||
95c385b4 | 2409 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2410 | addrconf_add_linklocal(idev, &lladdr); |
2411 | return 0; | |
2412 | } | |
2413 | return -1; | |
2414 | } | |
2415 | ||
2416 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2417 | { | |
2418 | struct net_device *link_dev; | |
c346dca1 | 2419 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2420 | |
2421 | /* first try to inherit the link-local address from the link device */ | |
2422 | if (idev->dev->iflink && | |
6fda7350 | 2423 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2424 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2425 | return; | |
2426 | } | |
2427 | /* then try to inherit it from any device */ | |
6fda7350 | 2428 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2429 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2430 | return; | |
2431 | } | |
2432 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2433 | } | |
2434 | ||
2435 | /* | |
2436 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2437 | * DHCPv6, MLD etc. can be run over the virtual link | |
2438 | */ | |
2439 | ||
2440 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2441 | { | |
2442 | struct inet6_dev *idev; | |
2443 | ||
2444 | ASSERT_RTNL(); | |
2445 | ||
2446 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2447 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2448 | return; | |
2449 | } | |
2450 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2451 | } |
2452 | ||
1ab1457c | 2453 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2454 | void * data) |
2455 | { | |
2456 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2457 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2458 | int run_pending = 0; |
b217d616 | 2459 | int err; |
1da177e4 LT |
2460 | |
2461 | switch(event) { | |
45ba9dd2 | 2462 | case NETDEV_REGISTER: |
74235a25 | 2463 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2464 | idev = ipv6_add_dev(dev); |
2465 | if (!idev) | |
b217d616 | 2466 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2467 | } |
2468 | break; | |
1da177e4 | 2469 | case NETDEV_UP: |
3c21edbd | 2470 | case NETDEV_CHANGE: |
c2edacf8 JV |
2471 | if (dev->flags & IFF_SLAVE) |
2472 | break; | |
2473 | ||
3c21edbd | 2474 | if (event == NETDEV_UP) { |
f24e3d65 | 2475 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2476 | /* device is not ready yet. */ |
2477 | printk(KERN_INFO | |
2478 | "ADDRCONF(NETDEV_UP): %s: " | |
2479 | "link is not ready\n", | |
2480 | dev->name); | |
2481 | break; | |
2482 | } | |
99081049 | 2483 | |
d31c7b8f EP |
2484 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2485 | idev = ipv6_add_dev(dev); | |
2486 | ||
e3ec6cfc | 2487 | if (idev) { |
99081049 | 2488 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2489 | run_pending = 1; |
2490 | } | |
3c21edbd | 2491 | } else { |
f24e3d65 | 2492 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2493 | /* device is still not ready. */ |
2494 | break; | |
2495 | } | |
2496 | ||
2497 | if (idev) { | |
2498 | if (idev->if_flags & IF_READY) { | |
2499 | /* device is already configured. */ | |
2500 | break; | |
2501 | } | |
2502 | idev->if_flags |= IF_READY; | |
2503 | } | |
2504 | ||
2505 | printk(KERN_INFO | |
2506 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2507 | "link becomes ready\n", | |
2508 | dev->name); | |
2509 | ||
c5e33bdd | 2510 | run_pending = 1; |
3c21edbd YH |
2511 | } |
2512 | ||
1da177e4 | 2513 | switch(dev->type) { |
0be669bb | 2514 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2515 | case ARPHRD_SIT: |
2516 | addrconf_sit_config(dev); | |
2517 | break; | |
0be669bb | 2518 | #endif |
1da177e4 LT |
2519 | case ARPHRD_TUNNEL6: |
2520 | addrconf_ip6_tnl_config(dev); | |
2521 | break; | |
2522 | case ARPHRD_LOOPBACK: | |
2523 | init_loopback(dev); | |
2524 | break; | |
2525 | ||
2526 | default: | |
2527 | addrconf_dev_config(dev); | |
2528 | break; | |
3ff50b79 | 2529 | } |
1da177e4 | 2530 | if (idev) { |
c5e33bdd YH |
2531 | if (run_pending) |
2532 | addrconf_dad_run(idev); | |
2533 | ||
1da177e4 LT |
2534 | /* If the MTU changed during the interface down, when the |
2535 | interface up, the changed MTU must be reflected in the | |
2536 | idev as well as routers. | |
2537 | */ | |
2538 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2539 | rt6_mtu_change(dev, dev->mtu); | |
2540 | idev->cnf.mtu6 = dev->mtu; | |
2541 | } | |
2542 | idev->tstamp = jiffies; | |
2543 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2544 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2545 | stop IPv6 on this interface. | |
2546 | */ | |
2547 | if (dev->mtu < IPV6_MIN_MTU) | |
2548 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2549 | } | |
2550 | break; | |
2551 | ||
2552 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2553 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2554 | rt6_mtu_change(dev, dev->mtu); |
2555 | idev->cnf.mtu6 = dev->mtu; | |
2556 | break; | |
2557 | } | |
2558 | ||
d31c7b8f EP |
2559 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2560 | idev = ipv6_add_dev(dev); | |
2561 | if (idev) | |
2562 | break; | |
2563 | } | |
2564 | ||
1da177e4 LT |
2565 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2566 | ||
2567 | case NETDEV_DOWN: | |
2568 | case NETDEV_UNREGISTER: | |
2569 | /* | |
2570 | * Remove all addresses from this interface. | |
2571 | */ | |
2572 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2573 | break; | |
3c21edbd | 2574 | |
1da177e4 | 2575 | case NETDEV_CHANGENAME: |
1da177e4 | 2576 | if (idev) { |
5632c515 | 2577 | snmp6_unregister_dev(idev); |
408c4768 | 2578 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2579 | addrconf_sysctl_register(idev); |
b217d616 HX |
2580 | err = snmp6_register_dev(idev); |
2581 | if (err) | |
2582 | return notifier_from_errno(err); | |
5632c515 | 2583 | } |
1da177e4 | 2584 | break; |
3ff50b79 | 2585 | } |
1da177e4 LT |
2586 | |
2587 | return NOTIFY_OK; | |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * addrconf module should be notified of a device going up | |
2592 | */ | |
2593 | static struct notifier_block ipv6_dev_notf = { | |
2594 | .notifier_call = addrconf_notify, | |
2595 | .priority = 0 | |
2596 | }; | |
2597 | ||
2598 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2599 | { | |
2600 | struct inet6_dev *idev; | |
2601 | struct inet6_ifaddr *ifa, **bifa; | |
c346dca1 | 2602 | struct net *net = dev_net(dev); |
1da177e4 LT |
2603 | int i; |
2604 | ||
2605 | ASSERT_RTNL(); | |
2606 | ||
f3db4851 | 2607 | rt6_ifdown(net, dev); |
1da177e4 LT |
2608 | neigh_ifdown(&nd_tbl, dev); |
2609 | ||
2610 | idev = __in6_dev_get(dev); | |
2611 | if (idev == NULL) | |
2612 | return -ENODEV; | |
2613 | ||
2614 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2615 | Do not dev_put! |
1da177e4 | 2616 | */ |
439e2385 | 2617 | if (how) { |
1da177e4 | 2618 | idev->dead = 1; |
8814c4b5 YH |
2619 | |
2620 | /* protected by rtnl_lock */ | |
2621 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2622 | |
2623 | /* Step 1.5: remove snmp6 entry */ | |
2624 | snmp6_unregister_dev(idev); | |
2625 | ||
2626 | } | |
2627 | ||
2628 | /* Step 2: clear hash table */ | |
2629 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2630 | bifa = &inet6_addr_lst[i]; | |
2631 | ||
2632 | write_lock_bh(&addrconf_hash_lock); | |
2633 | while ((ifa = *bifa) != NULL) { | |
2634 | if (ifa->idev == idev) { | |
2635 | *bifa = ifa->lst_next; | |
2636 | ifa->lst_next = NULL; | |
2637 | addrconf_del_timer(ifa); | |
2638 | in6_ifa_put(ifa); | |
2639 | continue; | |
2640 | } | |
2641 | bifa = &ifa->lst_next; | |
2642 | } | |
2643 | write_unlock_bh(&addrconf_hash_lock); | |
2644 | } | |
2645 | ||
2646 | write_lock_bh(&idev->lock); | |
2647 | ||
2648 | /* Step 3: clear flags for stateless addrconf */ | |
439e2385 | 2649 | if (!how) |
3c21edbd | 2650 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2651 | |
2652 | /* Step 4: clear address list */ | |
2653 | #ifdef CONFIG_IPV6_PRIVACY | |
439e2385 | 2654 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2655 | in6_dev_put(idev); |
2656 | ||
2657 | /* clear tempaddr list */ | |
2658 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2659 | idev->tempaddr_list = ifa->tmp_next; | |
2660 | ifa->tmp_next = NULL; | |
2661 | ifa->dead = 1; | |
2662 | write_unlock_bh(&idev->lock); | |
2663 | spin_lock_bh(&ifa->lock); | |
2664 | ||
2665 | if (ifa->ifpub) { | |
2666 | in6_ifa_put(ifa->ifpub); | |
2667 | ifa->ifpub = NULL; | |
2668 | } | |
2669 | spin_unlock_bh(&ifa->lock); | |
2670 | in6_ifa_put(ifa); | |
2671 | write_lock_bh(&idev->lock); | |
2672 | } | |
2673 | #endif | |
2674 | while ((ifa = idev->addr_list) != NULL) { | |
2675 | idev->addr_list = ifa->if_next; | |
2676 | ifa->if_next = NULL; | |
2677 | ifa->dead = 1; | |
2678 | addrconf_del_timer(ifa); | |
2679 | write_unlock_bh(&idev->lock); | |
2680 | ||
2681 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2682 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2683 | in6_ifa_put(ifa); |
2684 | ||
2685 | write_lock_bh(&idev->lock); | |
2686 | } | |
2687 | write_unlock_bh(&idev->lock); | |
2688 | ||
2689 | /* Step 5: Discard multicast list */ | |
2690 | ||
439e2385 | 2691 | if (how) |
1da177e4 LT |
2692 | ipv6_mc_destroy_dev(idev); |
2693 | else | |
2694 | ipv6_mc_down(idev); | |
2695 | ||
1da177e4 | 2696 | idev->tstamp = jiffies; |
1ab1457c | 2697 | |
1da177e4 LT |
2698 | /* Shot the device (if unregistered) */ |
2699 | ||
439e2385 | 2700 | if (how) { |
408c4768 | 2701 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2702 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2703 | neigh_ifdown(&nd_tbl, dev); | |
2704 | in6_dev_put(idev); | |
2705 | } | |
2706 | return 0; | |
2707 | } | |
2708 | ||
2709 | static void addrconf_rs_timer(unsigned long data) | |
2710 | { | |
2711 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2712 | ||
2713 | if (ifp->idev->cnf.forwarding) | |
2714 | goto out; | |
2715 | ||
2716 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2717 | /* | |
2718 | * Announcement received after solicitation | |
2719 | * was sent | |
2720 | */ | |
2721 | goto out; | |
2722 | } | |
2723 | ||
2724 | spin_lock(&ifp->lock); | |
2725 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
1da177e4 LT |
2726 | /* The wait after the last probe can be shorter */ |
2727 | addrconf_mod_timer(ifp, AC_RS, | |
2728 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2729 | ifp->idev->cnf.rtr_solicit_delay : | |
2730 | ifp->idev->cnf.rtr_solicit_interval); | |
2731 | spin_unlock(&ifp->lock); | |
2732 | ||
f3ee4010 | 2733 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2734 | } else { |
2735 | spin_unlock(&ifp->lock); | |
2736 | /* | |
2737 | * Note: we do not support deprecated "all on-link" | |
2738 | * assumption any longer. | |
2739 | */ | |
2740 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2741 | ifp->idev->dev->name); | |
2742 | } | |
2743 | ||
2744 | out: | |
2745 | in6_ifa_put(ifp); | |
2746 | } | |
2747 | ||
2748 | /* | |
2749 | * Duplicate Address Detection | |
2750 | */ | |
3c21edbd YH |
2751 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2752 | { | |
2753 | unsigned long rand_num; | |
2754 | struct inet6_dev *idev = ifp->idev; | |
2755 | ||
95c385b4 NH |
2756 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2757 | rand_num = 0; | |
2758 | else | |
2759 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2760 | ||
3c21edbd YH |
2761 | ifp->probes = idev->cnf.dad_transmits; |
2762 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2763 | } | |
2764 | ||
e431b8c0 | 2765 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2766 | { |
2767 | struct inet6_dev *idev = ifp->idev; | |
2768 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2769 | |
2770 | addrconf_join_solict(dev, &ifp->addr); | |
2771 | ||
1da177e4 | 2772 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2773 | |
2774 | read_lock_bh(&idev->lock); | |
2775 | if (ifp->dead) | |
2776 | goto out; | |
2777 | spin_lock_bh(&ifp->lock); | |
2778 | ||
2779 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 2780 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2781 | !(ifp->flags&IFA_F_TENTATIVE) || |
2782 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2783 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
1da177e4 LT |
2784 | spin_unlock_bh(&ifp->lock); |
2785 | read_unlock_bh(&idev->lock); | |
2786 | ||
2787 | addrconf_dad_completed(ifp); | |
2788 | return; | |
2789 | } | |
2790 | ||
6732bade | 2791 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2792 | spin_unlock_bh(&ifp->lock); |
6732bade | 2793 | read_unlock_bh(&idev->lock); |
3c21edbd | 2794 | /* |
590a9887 | 2795 | * If the device is not ready: |
3c21edbd YH |
2796 | * - keep it tentative if it is a permanent address. |
2797 | * - otherwise, kill it. | |
2798 | */ | |
2799 | in6_ifa_hold(ifp); | |
cc411d0b | 2800 | addrconf_dad_stop(ifp, 0); |
6732bade | 2801 | return; |
3c21edbd | 2802 | } |
95c385b4 NH |
2803 | |
2804 | /* | |
2805 | * Optimistic nodes can start receiving | |
2806 | * Frames right away | |
2807 | */ | |
2808 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2809 | ip6_ins_rt(ifp->rt); | |
2810 | ||
6732bade YH |
2811 | addrconf_dad_kick(ifp); |
2812 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2813 | out: |
2814 | read_unlock_bh(&idev->lock); | |
2815 | } | |
2816 | ||
2817 | static void addrconf_dad_timer(unsigned long data) | |
2818 | { | |
2819 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2820 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2821 | struct in6_addr mcaddr; |
2822 | ||
2823 | read_lock_bh(&idev->lock); | |
2824 | if (idev->dead) { | |
2825 | read_unlock_bh(&idev->lock); | |
2826 | goto out; | |
2827 | } | |
2828 | spin_lock_bh(&ifp->lock); | |
2829 | if (ifp->probes == 0) { | |
2830 | /* | |
2831 | * DAD was successful | |
2832 | */ | |
2833 | ||
cc411d0b | 2834 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
1da177e4 LT |
2835 | spin_unlock_bh(&ifp->lock); |
2836 | read_unlock_bh(&idev->lock); | |
2837 | ||
2838 | addrconf_dad_completed(ifp); | |
2839 | ||
2840 | goto out; | |
2841 | } | |
2842 | ||
2843 | ifp->probes--; | |
2844 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2845 | spin_unlock_bh(&ifp->lock); | |
2846 | read_unlock_bh(&idev->lock); | |
2847 | ||
2848 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2849 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2850 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2851 | out: |
2852 | in6_ifa_put(ifp); | |
2853 | } | |
2854 | ||
2855 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2856 | { | |
2857 | struct net_device * dev = ifp->idev->dev; | |
2858 | ||
2859 | /* | |
2860 | * Configure the address for reception. Now it is valid. | |
2861 | */ | |
2862 | ||
2863 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2864 | ||
2865 | /* If added prefix is link local and forwarding is off, | |
2866 | start sending router solicitations. | |
2867 | */ | |
2868 | ||
2869 | if (ifp->idev->cnf.forwarding == 0 && | |
2870 | ifp->idev->cnf.rtr_solicits > 0 && | |
2871 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2872 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2873 | /* |
2874 | * If a host as already performed a random delay | |
2875 | * [...] as part of DAD [...] there is no need | |
2876 | * to delay again before sending the first RS | |
2877 | */ | |
f3ee4010 | 2878 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2879 | |
2880 | spin_lock_bh(&ifp->lock); | |
2881 | ifp->probes = 1; | |
2882 | ifp->idev->if_flags |= IF_RS_SENT; | |
2883 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2884 | spin_unlock_bh(&ifp->lock); | |
2885 | } | |
2886 | } | |
2887 | ||
c5e33bdd YH |
2888 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2889 | struct inet6_ifaddr *ifp; | |
2890 | ||
2891 | read_lock_bh(&idev->lock); | |
2892 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2893 | spin_lock_bh(&ifp->lock); | |
2894 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2895 | spin_unlock_bh(&ifp->lock); | |
2896 | continue; | |
2897 | } | |
2898 | spin_unlock_bh(&ifp->lock); | |
2899 | addrconf_dad_kick(ifp); | |
2900 | } | |
2901 | read_unlock_bh(&idev->lock); | |
2902 | } | |
2903 | ||
1da177e4 LT |
2904 | #ifdef CONFIG_PROC_FS |
2905 | struct if6_iter_state { | |
3c40090a | 2906 | struct seq_net_private p; |
1da177e4 LT |
2907 | int bucket; |
2908 | }; | |
2909 | ||
2910 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2911 | { | |
2912 | struct inet6_ifaddr *ifa = NULL; | |
2913 | struct if6_iter_state *state = seq->private; | |
1218854a | 2914 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2915 | |
2916 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2917 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2918 | |
878628fb | 2919 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2920 | ifa = ifa->lst_next; |
1da177e4 LT |
2921 | if (ifa) |
2922 | break; | |
2923 | } | |
2924 | return ifa; | |
2925 | } | |
2926 | ||
2927 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2928 | { | |
2929 | struct if6_iter_state *state = seq->private; | |
1218854a | 2930 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2931 | |
2932 | ifa = ifa->lst_next; | |
2933 | try_again: | |
3c40090a | 2934 | if (ifa) { |
878628fb | 2935 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2936 | ifa = ifa->lst_next; |
2937 | goto try_again; | |
2938 | } | |
2939 | } | |
2940 | ||
1da177e4 LT |
2941 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2942 | ifa = inet6_addr_lst[state->bucket]; | |
2943 | goto try_again; | |
2944 | } | |
3c40090a | 2945 | |
1da177e4 LT |
2946 | return ifa; |
2947 | } | |
2948 | ||
2949 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2950 | { | |
2951 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2952 | ||
2953 | if (ifa) | |
2954 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2955 | --pos; | |
2956 | return pos ? NULL : ifa; | |
2957 | } | |
2958 | ||
2959 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 2960 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
2961 | { |
2962 | read_lock_bh(&addrconf_hash_lock); | |
2963 | return if6_get_idx(seq, *pos); | |
2964 | } | |
2965 | ||
2966 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2967 | { | |
2968 | struct inet6_ifaddr *ifa; | |
2969 | ||
2970 | ifa = if6_get_next(seq, v); | |
2971 | ++*pos; | |
2972 | return ifa; | |
2973 | } | |
2974 | ||
2975 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 2976 | __releases(addrconf_hash_lock) |
1da177e4 LT |
2977 | { |
2978 | read_unlock_bh(&addrconf_hash_lock); | |
2979 | } | |
2980 | ||
2981 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2982 | { | |
2983 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 2984 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 2985 | &ifp->addr, |
1da177e4 LT |
2986 | ifp->idev->dev->ifindex, |
2987 | ifp->prefix_len, | |
2988 | ifp->scope, | |
2989 | ifp->flags, | |
2990 | ifp->idev->dev->name); | |
2991 | return 0; | |
2992 | } | |
2993 | ||
56b3d975 | 2994 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2995 | .start = if6_seq_start, |
2996 | .next = if6_seq_next, | |
2997 | .show = if6_seq_show, | |
2998 | .stop = if6_seq_stop, | |
2999 | }; | |
3000 | ||
3001 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3002 | { | |
3c40090a DL |
3003 | return seq_open_net(inode, file, &if6_seq_ops, |
3004 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3005 | } |
3006 | ||
9a32144e | 3007 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3008 | .owner = THIS_MODULE, |
3009 | .open = if6_seq_open, | |
3010 | .read = seq_read, | |
3011 | .llseek = seq_lseek, | |
3c40090a | 3012 | .release = seq_release_net, |
1da177e4 LT |
3013 | }; |
3014 | ||
3c40090a | 3015 | static int if6_proc_net_init(struct net *net) |
1da177e4 | 3016 | { |
3c40090a | 3017 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3018 | return -ENOMEM; |
3019 | return 0; | |
3020 | } | |
3021 | ||
3c40090a DL |
3022 | static void if6_proc_net_exit(struct net *net) |
3023 | { | |
3024 | proc_net_remove(net, "if_inet6"); | |
3025 | } | |
3026 | ||
3027 | static struct pernet_operations if6_proc_net_ops = { | |
3028 | .init = if6_proc_net_init, | |
3029 | .exit = if6_proc_net_exit, | |
3030 | }; | |
3031 | ||
3032 | int __init if6_proc_init(void) | |
3033 | { | |
3034 | return register_pernet_subsys(&if6_proc_net_ops); | |
3035 | } | |
3036 | ||
1da177e4 LT |
3037 | void if6_proc_exit(void) |
3038 | { | |
3c40090a | 3039 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3040 | } |
3041 | #endif /* CONFIG_PROC_FS */ | |
3042 | ||
59fbb3a6 | 3043 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3044 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3045 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3046 | { |
3047 | int ret = 0; | |
3048 | struct inet6_ifaddr * ifp; | |
3049 | u8 hash = ipv6_addr_hash(addr); | |
3050 | read_lock_bh(&addrconf_hash_lock); | |
3051 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 3052 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3053 | continue; |
caad295f | 3054 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3055 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3056 | ret = 1; | |
3057 | break; | |
3058 | } | |
3059 | } | |
3060 | read_unlock_bh(&addrconf_hash_lock); | |
3061 | return ret; | |
3062 | } | |
3063 | #endif | |
3064 | ||
1da177e4 LT |
3065 | /* |
3066 | * Periodic address status verification | |
3067 | */ | |
3068 | ||
3069 | static void addrconf_verify(unsigned long foo) | |
3070 | { | |
3071 | struct inet6_ifaddr *ifp; | |
3072 | unsigned long now, next; | |
3073 | int i; | |
3074 | ||
3075 | spin_lock_bh(&addrconf_verify_lock); | |
3076 | now = jiffies; | |
3077 | next = now + ADDR_CHECK_FREQUENCY; | |
3078 | ||
3079 | del_timer(&addr_chk_timer); | |
3080 | ||
3081 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3082 | ||
3083 | restart: | |
5d5780df | 3084 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
3085 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
3086 | unsigned long age; | |
3087 | #ifdef CONFIG_IPV6_PRIVACY | |
3088 | unsigned long regen_advance; | |
3089 | #endif | |
3090 | ||
3091 | if (ifp->flags & IFA_F_PERMANENT) | |
3092 | continue; | |
3093 | ||
3094 | spin_lock(&ifp->lock); | |
3095 | age = (now - ifp->tstamp) / HZ; | |
3096 | ||
3097 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3098 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3099 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3100 | ifp->idev->nd_parms->retrans_time / HZ; |
3101 | #endif | |
3102 | ||
8f27ebb9 YH |
3103 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3104 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3105 | spin_unlock(&ifp->lock); |
3106 | in6_ifa_hold(ifp); | |
5d5780df | 3107 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3108 | ipv6_del_addr(ifp); |
3109 | goto restart; | |
8f27ebb9 YH |
3110 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3111 | spin_unlock(&ifp->lock); | |
3112 | continue; | |
1da177e4 | 3113 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3114 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3115 | int deprecate = 0; |
3116 | ||
3117 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3118 | deprecate = 1; | |
3119 | ifp->flags |= IFA_F_DEPRECATED; | |
3120 | } | |
3121 | ||
3122 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3123 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3124 | ||
3125 | spin_unlock(&ifp->lock); | |
3126 | ||
3127 | if (deprecate) { | |
3128 | in6_ifa_hold(ifp); | |
5d5780df | 3129 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3130 | |
3131 | ipv6_ifa_notify(0, ifp); | |
3132 | in6_ifa_put(ifp); | |
3133 | goto restart; | |
3134 | } | |
3135 | #ifdef CONFIG_IPV6_PRIVACY | |
3136 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3137 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3138 | if (age >= ifp->prefered_lft - regen_advance) { | |
3139 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3140 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3141 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3142 | if (!ifp->regen_count && ifpub) { | |
3143 | ifp->regen_count++; | |
3144 | in6_ifa_hold(ifp); | |
3145 | in6_ifa_hold(ifpub); | |
3146 | spin_unlock(&ifp->lock); | |
5d5780df | 3147 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3148 | spin_lock(&ifpub->lock); |
3149 | ifpub->regen_count = 0; | |
3150 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3151 | ipv6_create_tempaddr(ifpub, ifp); |
3152 | in6_ifa_put(ifpub); | |
3153 | in6_ifa_put(ifp); | |
3154 | goto restart; | |
3155 | } | |
3156 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3157 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3158 | spin_unlock(&ifp->lock); | |
3159 | #endif | |
3160 | } else { | |
3161 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3162 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3163 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3164 | spin_unlock(&ifp->lock); | |
3165 | } | |
3166 | } | |
5d5780df | 3167 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3168 | } |
3169 | ||
3170 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3171 | add_timer(&addr_chk_timer); | |
3172 | spin_unlock_bh(&addrconf_verify_lock); | |
3173 | } | |
3174 | ||
461d8837 TG |
3175 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3176 | { | |
3177 | struct in6_addr *pfx = NULL; | |
3178 | ||
3179 | if (addr) | |
3180 | pfx = nla_data(addr); | |
3181 | ||
3182 | if (local) { | |
3183 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3184 | pfx = NULL; | |
3185 | else | |
3186 | pfx = nla_data(local); | |
3187 | } | |
3188 | ||
3189 | return pfx; | |
3190 | } | |
3191 | ||
ef7c79ed | 3192 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3193 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3194 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3195 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3196 | }; | |
3197 | ||
1da177e4 LT |
3198 | static int |
3199 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3200 | { | |
3b1e0a65 | 3201 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3202 | struct ifaddrmsg *ifm; |
3203 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3204 | struct in6_addr *pfx; |
b933f716 | 3205 | int err; |
1da177e4 | 3206 | |
b933f716 TG |
3207 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3208 | if (err < 0) | |
3209 | return err; | |
3210 | ||
3211 | ifm = nlmsg_data(nlh); | |
3212 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3213 | if (pfx == NULL) |
3214 | return -EINVAL; | |
3215 | ||
af284937 | 3216 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3217 | } |
3218 | ||
55ebaef1 NT |
3219 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3220 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3221 | { |
6f704992 YH |
3222 | u32 flags; |
3223 | clock_t expires; | |
4bed72e4 | 3224 | unsigned long timeout; |
46d48046 | 3225 | |
081bba5b NT |
3226 | if (!valid_lft || (prefered_lft > valid_lft)) |
3227 | return -EINVAL; | |
3228 | ||
4bed72e4 YH |
3229 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3230 | if (addrconf_finite_timeout(timeout)) { | |
3231 | expires = jiffies_to_clock_t(timeout * HZ); | |
3232 | valid_lft = timeout; | |
6f704992 | 3233 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3234 | } else { |
3235 | expires = 0; | |
3236 | flags = 0; | |
3237 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3238 | } |
081bba5b | 3239 | |
4bed72e4 YH |
3240 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3241 | if (addrconf_finite_timeout(timeout)) { | |
3242 | if (timeout == 0) | |
3243 | ifa_flags |= IFA_F_DEPRECATED; | |
3244 | prefered_lft = timeout; | |
3245 | } | |
081bba5b NT |
3246 | |
3247 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3248 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3249 | ifp->tstamp = jiffies; |
3250 | ifp->valid_lft = valid_lft; | |
3251 | ifp->prefered_lft = prefered_lft; | |
3252 | ||
3253 | spin_unlock_bh(&ifp->lock); | |
3254 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3255 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3256 | |
46d48046 | 3257 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3258 | expires, flags); |
081bba5b NT |
3259 | addrconf_verify(0); |
3260 | ||
3261 | return 0; | |
3262 | } | |
3263 | ||
1da177e4 LT |
3264 | static int |
3265 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3266 | { | |
3b1e0a65 | 3267 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3268 | struct ifaddrmsg *ifm; |
3269 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3270 | struct in6_addr *pfx; |
7198f8ce TG |
3271 | struct inet6_ifaddr *ifa; |
3272 | struct net_device *dev; | |
55ebaef1 NT |
3273 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3274 | u8 ifa_flags; | |
461d8837 | 3275 | int err; |
1da177e4 | 3276 | |
461d8837 TG |
3277 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3278 | if (err < 0) | |
3279 | return err; | |
3280 | ||
3281 | ifm = nlmsg_data(nlh); | |
3282 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3283 | if (pfx == NULL) |
3284 | return -EINVAL; | |
3285 | ||
461d8837 | 3286 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3287 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3288 | |
3289 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3290 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3291 | preferred_lft = ci->ifa_prefered; |
3292 | } else { | |
3293 | preferred_lft = INFINITY_LIFE_TIME; | |
3294 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3295 | } |
3296 | ||
af284937 | 3297 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3298 | if (dev == NULL) |
3299 | return -ENODEV; | |
3300 | ||
55ebaef1 | 3301 | /* We ignore other flags so far. */ |
3b9f9a1c | 3302 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3303 | |
1cab3da6 | 3304 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3305 | if (ifa == NULL) { |
3306 | /* | |
3307 | * It would be best to check for !NLM_F_CREATE here but | |
3308 | * userspace alreay relies on not having to provide this. | |
3309 | */ | |
af284937 DL |
3310 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3311 | ifm->ifa_prefixlen, ifa_flags, | |
3312 | preferred_lft, valid_lft); | |
081bba5b NT |
3313 | } |
3314 | ||
7198f8ce TG |
3315 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3316 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3317 | err = -EEXIST; | |
3318 | else | |
55ebaef1 | 3319 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3320 | |
3321 | in6_ifa_put(ifa); | |
3322 | ||
3323 | return err; | |
1da177e4 LT |
3324 | } |
3325 | ||
101bb229 TG |
3326 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3327 | u8 scope, int ifindex) | |
3328 | { | |
3329 | struct ifaddrmsg *ifm; | |
3330 | ||
3331 | ifm = nlmsg_data(nlh); | |
3332 | ifm->ifa_family = AF_INET6; | |
3333 | ifm->ifa_prefixlen = prefixlen; | |
3334 | ifm->ifa_flags = flags; | |
3335 | ifm->ifa_scope = scope; | |
3336 | ifm->ifa_index = ifindex; | |
3337 | } | |
3338 | ||
85486af0 TG |
3339 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3340 | unsigned long tstamp, u32 preferred, u32 valid) | |
3341 | { | |
3342 | struct ifa_cacheinfo ci; | |
3343 | ||
3344 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3345 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3346 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3347 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3348 | ci.ifa_prefered = preferred; | |
3349 | ci.ifa_valid = valid; | |
3350 | ||
3351 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3352 | } | |
3353 | ||
101bb229 TG |
3354 | static inline int rt_scope(int ifa_scope) |
3355 | { | |
3356 | if (ifa_scope & IFA_HOST) | |
3357 | return RT_SCOPE_HOST; | |
3358 | else if (ifa_scope & IFA_LINK) | |
3359 | return RT_SCOPE_LINK; | |
3360 | else if (ifa_scope & IFA_SITE) | |
3361 | return RT_SCOPE_SITE; | |
3362 | else | |
3363 | return RT_SCOPE_UNIVERSE; | |
3364 | } | |
3365 | ||
0ab6803b TG |
3366 | static inline int inet6_ifaddr_msgsize(void) |
3367 | { | |
339bf98f TG |
3368 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3369 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3370 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3371 | } |
c5396a31 | 3372 | |
1da177e4 | 3373 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3374 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3375 | { |
1da177e4 | 3376 | struct nlmsghdr *nlh; |
85486af0 | 3377 | u32 preferred, valid; |
1da177e4 | 3378 | |
0ab6803b TG |
3379 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3380 | if (nlh == NULL) | |
26932566 | 3381 | return -EMSGSIZE; |
0ab6803b | 3382 | |
101bb229 TG |
3383 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3384 | ifa->idev->dev->ifindex); | |
3385 | ||
1da177e4 | 3386 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3387 | preferred = ifa->prefered_lft; |
3388 | valid = ifa->valid_lft; | |
3389 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3390 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3391 | if (preferred > tval) |
3392 | preferred -= tval; | |
3393 | else | |
3394 | preferred = 0; | |
85486af0 TG |
3395 | if (valid != INFINITY_LIFE_TIME) |
3396 | valid -= tval; | |
1da177e4 LT |
3397 | } |
3398 | } else { | |
85486af0 TG |
3399 | preferred = INFINITY_LIFE_TIME; |
3400 | valid = INFINITY_LIFE_TIME; | |
3401 | } | |
3402 | ||
0ab6803b | 3403 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3404 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3405 | nlmsg_cancel(skb, nlh); | |
3406 | return -EMSGSIZE; | |
3407 | } | |
1da177e4 | 3408 | |
0ab6803b | 3409 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3410 | } |
3411 | ||
3412 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3413 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3414 | { |
1da177e4 | 3415 | struct nlmsghdr *nlh; |
101bb229 TG |
3416 | u8 scope = RT_SCOPE_UNIVERSE; |
3417 | int ifindex = ifmca->idev->dev->ifindex; | |
3418 | ||
3419 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3420 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3421 | |
0ab6803b TG |
3422 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3423 | if (nlh == NULL) | |
26932566 | 3424 | return -EMSGSIZE; |
85486af0 | 3425 | |
0ab6803b TG |
3426 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3427 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3428 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3429 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3430 | nlmsg_cancel(skb, nlh); | |
3431 | return -EMSGSIZE; | |
3432 | } | |
85486af0 | 3433 | |
0ab6803b | 3434 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3435 | } |
3436 | ||
3437 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3438 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3439 | { |
1da177e4 | 3440 | struct nlmsghdr *nlh; |
101bb229 TG |
3441 | u8 scope = RT_SCOPE_UNIVERSE; |
3442 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3443 | ||
3444 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3445 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3446 | |
0ab6803b TG |
3447 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3448 | if (nlh == NULL) | |
26932566 | 3449 | return -EMSGSIZE; |
85486af0 | 3450 | |
0ab6803b TG |
3451 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3452 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3453 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3454 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3455 | nlmsg_cancel(skb, nlh); | |
3456 | return -EMSGSIZE; | |
3457 | } | |
1da177e4 | 3458 | |
0ab6803b | 3459 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3460 | } |
3461 | ||
3462 | enum addr_type_t | |
3463 | { | |
3464 | UNICAST_ADDR, | |
3465 | MULTICAST_ADDR, | |
3466 | ANYCAST_ADDR, | |
3467 | }; | |
3468 | ||
3469 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3470 | enum addr_type_t type) | |
3471 | { | |
3472 | int idx, ip_idx; | |
3473 | int s_idx, s_ip_idx; | |
3474 | int err = 1; | |
3475 | struct net_device *dev; | |
3476 | struct inet6_dev *idev = NULL; | |
3477 | struct inet6_ifaddr *ifa; | |
3478 | struct ifmcaddr6 *ifmca; | |
3479 | struct ifacaddr6 *ifaca; | |
3b1e0a65 | 3480 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3481 | |
3482 | s_idx = cb->args[0]; | |
3483 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3484 | |
7562f876 | 3485 | idx = 0; |
6fda7350 | 3486 | for_each_netdev(net, dev) { |
1da177e4 | 3487 | if (idx < s_idx) |
7562f876 | 3488 | goto cont; |
1da177e4 LT |
3489 | if (idx > s_idx) |
3490 | s_ip_idx = 0; | |
3491 | ip_idx = 0; | |
3492 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3493 | goto cont; |
1da177e4 LT |
3494 | read_lock_bh(&idev->lock); |
3495 | switch (type) { | |
3496 | case UNICAST_ADDR: | |
ae9cda5d | 3497 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3498 | for (ifa = idev->addr_list; ifa; |
3499 | ifa = ifa->if_next, ip_idx++) { | |
3500 | if (ip_idx < s_ip_idx) | |
3501 | continue; | |
5d5619b4 YH |
3502 | err = inet6_fill_ifaddr(skb, ifa, |
3503 | NETLINK_CB(cb->skb).pid, | |
3504 | cb->nlh->nlmsg_seq, | |
3505 | RTM_NEWADDR, | |
3506 | NLM_F_MULTI); | |
1da177e4 | 3507 | } |
1da177e4 LT |
3508 | break; |
3509 | case MULTICAST_ADDR: | |
3510 | /* multicast address */ | |
1ab1457c | 3511 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3512 | ifmca = ifmca->next, ip_idx++) { |
3513 | if (ip_idx < s_ip_idx) | |
3514 | continue; | |
5d5619b4 YH |
3515 | err = inet6_fill_ifmcaddr(skb, ifmca, |
3516 | NETLINK_CB(cb->skb).pid, | |
3517 | cb->nlh->nlmsg_seq, | |
3518 | RTM_GETMULTICAST, | |
3519 | NLM_F_MULTI); | |
1da177e4 LT |
3520 | } |
3521 | break; | |
3522 | case ANYCAST_ADDR: | |
3523 | /* anycast address */ | |
3524 | for (ifaca = idev->ac_list; ifaca; | |
3525 | ifaca = ifaca->aca_next, ip_idx++) { | |
3526 | if (ip_idx < s_ip_idx) | |
3527 | continue; | |
5d5619b4 YH |
3528 | err = inet6_fill_ifacaddr(skb, ifaca, |
3529 | NETLINK_CB(cb->skb).pid, | |
3530 | cb->nlh->nlmsg_seq, | |
3531 | RTM_GETANYCAST, | |
3532 | NLM_F_MULTI); | |
1da177e4 LT |
3533 | } |
3534 | break; | |
3535 | default: | |
3536 | break; | |
3537 | } | |
3538 | read_unlock_bh(&idev->lock); | |
3539 | in6_dev_put(idev); | |
5d5619b4 YH |
3540 | |
3541 | if (err <= 0) | |
3542 | break; | |
7562f876 PE |
3543 | cont: |
3544 | idx++; | |
1da177e4 | 3545 | } |
1da177e4 LT |
3546 | cb->args[0] = idx; |
3547 | cb->args[1] = ip_idx; | |
3548 | return skb->len; | |
3549 | } | |
3550 | ||
3551 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3552 | { | |
3553 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3554 | |
1da177e4 LT |
3555 | return inet6_dump_addr(skb, cb, type); |
3556 | } | |
3557 | ||
3558 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3559 | { | |
3560 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3561 | |
1da177e4 LT |
3562 | return inet6_dump_addr(skb, cb, type); |
3563 | } | |
3564 | ||
3565 | ||
3566 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3567 | { | |
3568 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3569 | |
1da177e4 LT |
3570 | return inet6_dump_addr(skb, cb, type); |
3571 | } | |
3572 | ||
1b29fc2c TG |
3573 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3574 | void *arg) | |
6c223828 | 3575 | { |
3b1e0a65 | 3576 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3577 | struct ifaddrmsg *ifm; |
3578 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3579 | struct in6_addr *addr = NULL; |
3580 | struct net_device *dev = NULL; | |
3581 | struct inet6_ifaddr *ifa; | |
3582 | struct sk_buff *skb; | |
6c223828 NT |
3583 | int err; |
3584 | ||
1b29fc2c TG |
3585 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3586 | if (err < 0) | |
3587 | goto errout; | |
3588 | ||
3589 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3590 | if (addr == NULL) { | |
3591 | err = -EINVAL; | |
3592 | goto errout; | |
6c223828 | 3593 | } |
6c223828 | 3594 | |
1b29fc2c | 3595 | ifm = nlmsg_data(nlh); |
6c223828 | 3596 | if (ifm->ifa_index) |
6fda7350 | 3597 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3598 | |
1cab3da6 | 3599 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3600 | err = -EADDRNOTAVAIL; |
3601 | goto errout; | |
3602 | } | |
6c223828 | 3603 | |
0ab6803b | 3604 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3605 | err = -ENOBUFS; |
1b29fc2c | 3606 | goto errout_ifa; |
6c223828 NT |
3607 | } |
3608 | ||
6c223828 NT |
3609 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3610 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3611 | if (err < 0) { |
3612 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3613 | WARN_ON(err == -EMSGSIZE); | |
3614 | kfree_skb(skb); | |
3615 | goto errout_ifa; | |
3616 | } | |
6fda7350 | 3617 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3618 | errout_ifa: |
6c223828 | 3619 | in6_ifa_put(ifa); |
1b29fc2c | 3620 | errout: |
6c223828 | 3621 | return err; |
6c223828 NT |
3622 | } |
3623 | ||
1da177e4 LT |
3624 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3625 | { | |
3626 | struct sk_buff *skb; | |
c346dca1 | 3627 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3628 | int err = -ENOBUFS; |
1da177e4 | 3629 | |
0ab6803b | 3630 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3631 | if (skb == NULL) |
3632 | goto errout; | |
3633 | ||
3634 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3635 | if (err < 0) { |
3636 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3637 | WARN_ON(err == -EMSGSIZE); | |
3638 | kfree_skb(skb); | |
3639 | goto errout; | |
3640 | } | |
1ce85fe4 PNA |
3641 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3642 | return; | |
5d620266 TG |
3643 | errout: |
3644 | if (err < 0) | |
6fda7350 | 3645 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3646 | } |
3647 | ||
b6f99a21 | 3648 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3649 | __s32 *array, int bytes) |
3650 | { | |
04561c1f TG |
3651 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3652 | ||
1da177e4 LT |
3653 | memset(array, 0, bytes); |
3654 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3655 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3656 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3657 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3658 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3659 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3660 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3661 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3662 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3663 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3664 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3665 | #ifdef CONFIG_IPV6_PRIVACY | |
3666 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3667 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3668 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3669 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3670 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3671 | #endif | |
3672 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3673 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3674 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3675 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3676 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3677 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3678 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3679 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3680 | #endif | |
930d6ff2 | 3681 | #endif |
fbea49e1 | 3682 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3683 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3684 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3685 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3686 | #endif | |
7bc570c8 YH |
3687 | #ifdef CONFIG_IPV6_MROUTE |
3688 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3689 | #endif | |
778d80be | 3690 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3691 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
1da177e4 LT |
3692 | } |
3693 | ||
339bf98f TG |
3694 | static inline size_t inet6_if_nlmsg_size(void) |
3695 | { | |
3696 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3697 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3698 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3699 | + nla_total_size(4) /* IFLA_MTU */ | |
3700 | + nla_total_size(4) /* IFLA_LINK */ | |
3701 | + nla_total_size( /* IFLA_PROTINFO */ | |
3702 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3703 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3704 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3705 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3706 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3707 | ); |
3708 | } | |
c5396a31 | 3709 | |
7f7d9a6b HX |
3710 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3711 | int bytes) | |
3712 | { | |
3713 | int i; | |
3714 | int pad = bytes - sizeof(u64) * items; | |
3715 | BUG_ON(pad < 0); | |
3716 | ||
3717 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3718 | put_unaligned(items, &stats[0]); | |
3719 | for (i = 1; i < items; i++) | |
3720 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3721 | ||
3722 | memset(&stats[items], 0, pad); | |
3723 | } | |
3724 | ||
3725 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3726 | int bytes) | |
3727 | { | |
3728 | switch(attrtype) { | |
3729 | case IFLA_INET6_STATS: | |
3730 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3731 | break; | |
3732 | case IFLA_INET6_ICMP6STATS: | |
3733 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3734 | break; | |
3735 | } | |
3736 | } | |
3737 | ||
1ab1457c | 3738 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3739 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3740 | { |
04561c1f | 3741 | struct net_device *dev = idev->dev; |
bf99f1bd | 3742 | struct nlattr *nla; |
04561c1f TG |
3743 | struct ifinfomsg *hdr; |
3744 | struct nlmsghdr *nlh; | |
3745 | void *protoinfo; | |
3746 | struct ifla_cacheinfo ci; | |
3747 | ||
3748 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3749 | if (nlh == NULL) | |
26932566 | 3750 | return -EMSGSIZE; |
04561c1f TG |
3751 | |
3752 | hdr = nlmsg_data(nlh); | |
3753 | hdr->ifi_family = AF_INET6; | |
3754 | hdr->__ifi_pad = 0; | |
3755 | hdr->ifi_type = dev->type; | |
3756 | hdr->ifi_index = dev->ifindex; | |
3757 | hdr->ifi_flags = dev_get_flags(dev); | |
3758 | hdr->ifi_change = 0; | |
3759 | ||
3760 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3761 | |
3762 | if (dev->addr_len) | |
04561c1f | 3763 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3764 | |
04561c1f | 3765 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3766 | if (dev->ifindex != dev->iflink) |
04561c1f | 3767 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3768 | |
04561c1f TG |
3769 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3770 | if (protoinfo == NULL) | |
3771 | goto nla_put_failure; | |
1da177e4 | 3772 | |
04561c1f | 3773 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3774 | |
1da177e4 LT |
3775 | ci.max_reasm_len = IPV6_MAXPLEN; |
3776 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3777 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3778 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3779 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3780 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3781 | ||
bf99f1bd YH |
3782 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3783 | if (nla == NULL) | |
04561c1f | 3784 | goto nla_put_failure; |
bf99f1bd | 3785 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3786 | |
bf99f1bd YH |
3787 | /* XXX - MC not implemented */ |
3788 | ||
3789 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3790 | if (nla == NULL) | |
3791 | goto nla_put_failure; | |
3792 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3793 | ||
3794 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3795 | if (nla == NULL) | |
3796 | goto nla_put_failure; | |
3797 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3798 | |
04561c1f TG |
3799 | nla_nest_end(skb, protoinfo); |
3800 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3801 | |
04561c1f | 3802 | nla_put_failure: |
26932566 PM |
3803 | nlmsg_cancel(skb, nlh); |
3804 | return -EMSGSIZE; | |
1da177e4 LT |
3805 | } |
3806 | ||
3807 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3808 | { | |
3b1e0a65 | 3809 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3810 | int idx, err; |
3811 | int s_idx = cb->args[0]; | |
3812 | struct net_device *dev; | |
3813 | struct inet6_dev *idev; | |
3814 | ||
3815 | read_lock(&dev_base_lock); | |
7562f876 | 3816 | idx = 0; |
6fda7350 | 3817 | for_each_netdev(net, dev) { |
1da177e4 | 3818 | if (idx < s_idx) |
7562f876 | 3819 | goto cont; |
1da177e4 | 3820 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3821 | goto cont; |
1ab1457c | 3822 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3823 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3824 | in6_dev_put(idev); |
3825 | if (err <= 0) | |
3826 | break; | |
7562f876 PE |
3827 | cont: |
3828 | idx++; | |
1da177e4 LT |
3829 | } |
3830 | read_unlock(&dev_base_lock); | |
3831 | cb->args[0] = idx; | |
3832 | ||
3833 | return skb->len; | |
3834 | } | |
3835 | ||
3836 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3837 | { | |
3838 | struct sk_buff *skb; | |
c346dca1 | 3839 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3840 | int err = -ENOBUFS; |
1ab1457c | 3841 | |
339bf98f | 3842 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3843 | if (skb == NULL) |
3844 | goto errout; | |
3845 | ||
3846 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3847 | if (err < 0) { |
3848 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3849 | WARN_ON(err == -EMSGSIZE); | |
3850 | kfree_skb(skb); | |
3851 | goto errout; | |
3852 | } | |
1ce85fe4 PNA |
3853 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3854 | return; | |
8d7a76c9 TG |
3855 | errout: |
3856 | if (err < 0) | |
6fda7350 | 3857 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3858 | } |
3859 | ||
339bf98f TG |
3860 | static inline size_t inet6_prefix_nlmsg_size(void) |
3861 | { | |
3862 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3863 | + nla_total_size(sizeof(struct in6_addr)) | |
3864 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3865 | } | |
c5396a31 | 3866 | |
1da177e4 | 3867 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3868 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3869 | int event, unsigned int flags) | |
1da177e4 | 3870 | { |
6051e2f4 TG |
3871 | struct prefixmsg *pmsg; |
3872 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3873 | struct prefix_cacheinfo ci; |
3874 | ||
6051e2f4 TG |
3875 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3876 | if (nlh == NULL) | |
26932566 | 3877 | return -EMSGSIZE; |
6051e2f4 TG |
3878 | |
3879 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3880 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3881 | pmsg->prefix_pad1 = 0; |
3882 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3883 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3884 | pmsg->prefix_len = pinfo->prefix_len; | |
3885 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3886 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3887 | pmsg->prefix_flags = 0; |
3888 | if (pinfo->onlink) | |
3889 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3890 | if (pinfo->autoconf) | |
3891 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3892 | ||
6051e2f4 | 3893 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3894 | |
3895 | ci.preferred_time = ntohl(pinfo->prefered); | |
3896 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3897 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3898 | |
6051e2f4 | 3899 | return nlmsg_end(skb, nlh); |
1da177e4 | 3900 | |
6051e2f4 | 3901 | nla_put_failure: |
26932566 PM |
3902 | nlmsg_cancel(skb, nlh); |
3903 | return -EMSGSIZE; | |
1da177e4 LT |
3904 | } |
3905 | ||
1ab1457c | 3906 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3907 | struct prefix_info *pinfo) |
3908 | { | |
3909 | struct sk_buff *skb; | |
c346dca1 | 3910 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3911 | int err = -ENOBUFS; |
1da177e4 | 3912 | |
339bf98f | 3913 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3914 | if (skb == NULL) |
3915 | goto errout; | |
3916 | ||
3917 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3918 | if (err < 0) { |
3919 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3920 | WARN_ON(err == -EMSGSIZE); | |
3921 | kfree_skb(skb); | |
3922 | goto errout; | |
3923 | } | |
1ce85fe4 PNA |
3924 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3925 | return; | |
8c384bfa TG |
3926 | errout: |
3927 | if (err < 0) | |
6fda7350 | 3928 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3929 | } |
3930 | ||
1da177e4 LT |
3931 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3932 | { | |
3933 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3934 | ||
3935 | switch (event) { | |
3936 | case RTM_NEWADDR: | |
95c385b4 NH |
3937 | /* |
3938 | * If the address was optimistic | |
3939 | * we inserted the route at the start of | |
3940 | * our DAD process, so we don't need | |
3941 | * to do it again | |
3942 | */ | |
3943 | if (!(ifp->rt->rt6i_node)) | |
3944 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3945 | if (ifp->idev->cnf.forwarding) |
3946 | addrconf_join_anycast(ifp); | |
3947 | break; | |
3948 | case RTM_DELADDR: | |
3949 | if (ifp->idev->cnf.forwarding) | |
3950 | addrconf_leave_anycast(ifp); | |
3951 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3952 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3953 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3954 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3955 | break; |
3956 | } | |
3957 | } | |
3958 | ||
3959 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3960 | { | |
8814c4b5 | 3961 | rcu_read_lock_bh(); |
1da177e4 LT |
3962 | if (likely(ifp->idev->dead == 0)) |
3963 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3964 | rcu_read_unlock_bh(); |
1da177e4 LT |
3965 | } |
3966 | ||
3967 | #ifdef CONFIG_SYSCTL | |
3968 | ||
3969 | static | |
3970 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3971 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3972 | { | |
3973 | int *valp = ctl->data; | |
3974 | int val = *valp; | |
3975 | int ret; | |
3976 | ||
3977 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3978 | ||
c8fecf22 | 3979 | if (write) |
b325fddb | 3980 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
1ab1457c | 3981 | return ret; |
1da177e4 LT |
3982 | } |
3983 | ||
1ab1457c | 3984 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3985 | void __user *oldval, |
3986 | size_t __user *oldlenp, | |
1f29bcd7 | 3987 | void __user *newval, size_t newlen) |
1da177e4 LT |
3988 | { |
3989 | int *valp = table->data; | |
c8fecf22 | 3990 | int val = *valp; |
1da177e4 LT |
3991 | int new; |
3992 | ||
3993 | if (!newval || !newlen) | |
3994 | return 0; | |
3995 | if (newlen != sizeof(int)) | |
3996 | return -EINVAL; | |
3997 | if (get_user(new, (int __user *)newval)) | |
3998 | return -EFAULT; | |
3999 | if (new == *valp) | |
4000 | return 0; | |
4001 | if (oldval && oldlenp) { | |
4002 | size_t len; | |
4003 | if (get_user(len, oldlenp)) | |
4004 | return -EFAULT; | |
4005 | if (len) { | |
4006 | if (len > table->maxlen) | |
4007 | len = table->maxlen; | |
4008 | if (copy_to_user(oldval, valp, len)) | |
4009 | return -EFAULT; | |
4010 | if (put_user(len, oldlenp)) | |
4011 | return -EFAULT; | |
4012 | } | |
4013 | } | |
4014 | ||
c8fecf22 | 4015 | *valp = new; |
b325fddb | 4016 | return addrconf_fixup_forwarding(table, valp, val); |
1da177e4 LT |
4017 | } |
4018 | ||
56d417b1 BH |
4019 | static void dev_disable_change(struct inet6_dev *idev) |
4020 | { | |
4021 | if (!idev || !idev->dev) | |
4022 | return; | |
4023 | ||
4024 | if (idev->cnf.disable_ipv6) | |
4025 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4026 | else | |
4027 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4028 | } | |
4029 | ||
4030 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4031 | { | |
4032 | struct net_device *dev; | |
4033 | struct inet6_dev *idev; | |
4034 | ||
4035 | read_lock(&dev_base_lock); | |
4036 | for_each_netdev(net, dev) { | |
4037 | rcu_read_lock(); | |
4038 | idev = __in6_dev_get(dev); | |
4039 | if (idev) { | |
4040 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4041 | idev->cnf.disable_ipv6 = newf; | |
4042 | if (changed) | |
4043 | dev_disable_change(idev); | |
4044 | } | |
4045 | rcu_read_unlock(); | |
4046 | } | |
4047 | read_unlock(&dev_base_lock); | |
4048 | } | |
4049 | ||
4050 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) | |
4051 | { | |
4052 | struct net *net; | |
4053 | ||
4054 | net = (struct net *)table->extra2; | |
4055 | ||
4056 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) | |
4057 | return 0; | |
4058 | ||
4059 | if (!rtnl_trylock()) | |
4060 | return restart_syscall(); | |
4061 | ||
4062 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
4063 | __s32 newf = net->ipv6.devconf_all->disable_ipv6; | |
4064 | net->ipv6.devconf_dflt->disable_ipv6 = newf; | |
4065 | addrconf_disable_change(net, newf); | |
4066 | } else if ((!*p) ^ (!old)) | |
4067 | dev_disable_change((struct inet6_dev *)table->extra1); | |
4068 | ||
4069 | rtnl_unlock(); | |
4070 | return 0; | |
4071 | } | |
4072 | ||
4073 | static | |
4074 | int addrconf_sysctl_disable(ctl_table *ctl, int write, struct file * filp, | |
4075 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
4076 | { | |
4077 | int *valp = ctl->data; | |
4078 | int val = *valp; | |
4079 | int ret; | |
4080 | ||
4081 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
4082 | ||
4083 | if (write) | |
4084 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
4085 | return ret; | |
4086 | } | |
4087 | ||
1da177e4 LT |
4088 | static struct addrconf_sysctl_table |
4089 | { | |
4090 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4091 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4092 | char *dev_name; |
ab32ea5d | 4093 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4094 | .sysctl_header = NULL, |
4095 | .addrconf_vars = { | |
1ab1457c | 4096 | { |
1da177e4 LT |
4097 | .ctl_name = NET_IPV6_FORWARDING, |
4098 | .procname = "forwarding", | |
1ab1457c | 4099 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
4100 | .maxlen = sizeof(int), |
4101 | .mode = 0644, | |
6d9f239a AD |
4102 | .proc_handler = addrconf_sysctl_forward, |
4103 | .strategy = addrconf_sysctl_forward_strategy, | |
1da177e4 LT |
4104 | }, |
4105 | { | |
4106 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
4107 | .procname = "hop_limit", | |
1ab1457c | 4108 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
4109 | .maxlen = sizeof(int), |
4110 | .mode = 0644, | |
4111 | .proc_handler = proc_dointvec, | |
4112 | }, | |
4113 | { | |
4114 | .ctl_name = NET_IPV6_MTU, | |
4115 | .procname = "mtu", | |
4116 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 4117 | .maxlen = sizeof(int), |
1da177e4 | 4118 | .mode = 0644, |
6d9f239a | 4119 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4120 | }, |
4121 | { | |
4122 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
4123 | .procname = "accept_ra", | |
1ab1457c | 4124 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
4125 | .maxlen = sizeof(int), |
4126 | .mode = 0644, | |
6d9f239a | 4127 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4128 | }, |
4129 | { | |
4130 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
4131 | .procname = "accept_redirects", | |
1ab1457c | 4132 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
4133 | .maxlen = sizeof(int), |
4134 | .mode = 0644, | |
6d9f239a | 4135 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4136 | }, |
4137 | { | |
4138 | .ctl_name = NET_IPV6_AUTOCONF, | |
4139 | .procname = "autoconf", | |
1ab1457c | 4140 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
4141 | .maxlen = sizeof(int), |
4142 | .mode = 0644, | |
6d9f239a | 4143 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4144 | }, |
4145 | { | |
4146 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
4147 | .procname = "dad_transmits", | |
1ab1457c | 4148 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
4149 | .maxlen = sizeof(int), |
4150 | .mode = 0644, | |
6d9f239a | 4151 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4152 | }, |
4153 | { | |
4154 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
4155 | .procname = "router_solicitations", | |
1ab1457c | 4156 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
4157 | .maxlen = sizeof(int), |
4158 | .mode = 0644, | |
6d9f239a | 4159 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4160 | }, |
4161 | { | |
4162 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
4163 | .procname = "router_solicitation_interval", | |
1ab1457c | 4164 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
4165 | .maxlen = sizeof(int), |
4166 | .mode = 0644, | |
6d9f239a AD |
4167 | .proc_handler = proc_dointvec_jiffies, |
4168 | .strategy = sysctl_jiffies, | |
1da177e4 LT |
4169 | }, |
4170 | { | |
4171 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
4172 | .procname = "router_solicitation_delay", | |
1ab1457c | 4173 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
4174 | .maxlen = sizeof(int), |
4175 | .mode = 0644, | |
6d9f239a AD |
4176 | .proc_handler = proc_dointvec_jiffies, |
4177 | .strategy = sysctl_jiffies, | |
1da177e4 LT |
4178 | }, |
4179 | { | |
4180 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
4181 | .procname = "force_mld_version", | |
1ab1457c | 4182 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
4183 | .maxlen = sizeof(int), |
4184 | .mode = 0644, | |
6d9f239a | 4185 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4186 | }, |
4187 | #ifdef CONFIG_IPV6_PRIVACY | |
4188 | { | |
4189 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
4190 | .procname = "use_tempaddr", | |
1ab1457c | 4191 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
4192 | .maxlen = sizeof(int), |
4193 | .mode = 0644, | |
6d9f239a | 4194 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4195 | }, |
4196 | { | |
4197 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
4198 | .procname = "temp_valid_lft", | |
1ab1457c | 4199 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
4200 | .maxlen = sizeof(int), |
4201 | .mode = 0644, | |
6d9f239a | 4202 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4203 | }, |
4204 | { | |
4205 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
4206 | .procname = "temp_prefered_lft", | |
1ab1457c | 4207 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4208 | .maxlen = sizeof(int), |
4209 | .mode = 0644, | |
6d9f239a | 4210 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4211 | }, |
4212 | { | |
4213 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
4214 | .procname = "regen_max_retry", | |
1ab1457c | 4215 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4216 | .maxlen = sizeof(int), |
4217 | .mode = 0644, | |
6d9f239a | 4218 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4219 | }, |
4220 | { | |
4221 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
4222 | .procname = "max_desync_factor", | |
1ab1457c | 4223 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4224 | .maxlen = sizeof(int), |
4225 | .mode = 0644, | |
6d9f239a | 4226 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4227 | }, |
4228 | #endif | |
4229 | { | |
4230 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
4231 | .procname = "max_addresses", | |
4232 | .data = &ipv6_devconf.max_addresses, | |
4233 | .maxlen = sizeof(int), | |
4234 | .mode = 0644, | |
6d9f239a | 4235 | .proc_handler = proc_dointvec, |
1da177e4 | 4236 | }, |
65f5c7c1 YH |
4237 | { |
4238 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
4239 | .procname = "accept_ra_defrtr", | |
1ab1457c | 4240 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4241 | .maxlen = sizeof(int), |
4242 | .mode = 0644, | |
6d9f239a | 4243 | .proc_handler = proc_dointvec, |
65f5c7c1 | 4244 | }, |
c4fd30eb YH |
4245 | { |
4246 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
4247 | .procname = "accept_ra_pinfo", | |
1ab1457c | 4248 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4249 | .maxlen = sizeof(int), |
4250 | .mode = 0644, | |
6d9f239a | 4251 | .proc_handler = proc_dointvec, |
c4fd30eb | 4252 | }, |
930d6ff2 YH |
4253 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4254 | { | |
4255 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
4256 | .procname = "accept_ra_rtr_pref", | |
4257 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4258 | .maxlen = sizeof(int), | |
4259 | .mode = 0644, | |
6d9f239a | 4260 | .proc_handler = proc_dointvec, |
930d6ff2 | 4261 | }, |
52e16356 YH |
4262 | { |
4263 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
4264 | .procname = "router_probe_interval", | |
4265 | .data = &ipv6_devconf.rtr_probe_interval, | |
4266 | .maxlen = sizeof(int), | |
4267 | .mode = 0644, | |
6d9f239a AD |
4268 | .proc_handler = proc_dointvec_jiffies, |
4269 | .strategy = sysctl_jiffies, | |
52e16356 | 4270 | }, |
fa03ef38 | 4271 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4272 | { |
4273 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4274 | .procname = "accept_ra_rt_info_max_plen", | |
4275 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4276 | .maxlen = sizeof(int), | |
4277 | .mode = 0644, | |
6d9f239a | 4278 | .proc_handler = proc_dointvec, |
09c884d4 YH |
4279 | }, |
4280 | #endif | |
930d6ff2 | 4281 | #endif |
fbea49e1 YH |
4282 | { |
4283 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4284 | .procname = "proxy_ndp", | |
4285 | .data = &ipv6_devconf.proxy_ndp, | |
4286 | .maxlen = sizeof(int), | |
4287 | .mode = 0644, | |
6d9f239a | 4288 | .proc_handler = proc_dointvec, |
fbea49e1 | 4289 | }, |
0bcbc926 YH |
4290 | { |
4291 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4292 | .procname = "accept_source_route", | |
4293 | .data = &ipv6_devconf.accept_source_route, | |
4294 | .maxlen = sizeof(int), | |
4295 | .mode = 0644, | |
6d9f239a | 4296 | .proc_handler = proc_dointvec, |
0bcbc926 | 4297 | }, |
95c385b4 NH |
4298 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4299 | { | |
4300 | .ctl_name = CTL_UNNUMBERED, | |
4301 | .procname = "optimistic_dad", | |
4302 | .data = &ipv6_devconf.optimistic_dad, | |
4303 | .maxlen = sizeof(int), | |
4304 | .mode = 0644, | |
6d9f239a | 4305 | .proc_handler = proc_dointvec, |
95c385b4 NH |
4306 | |
4307 | }, | |
7bc570c8 YH |
4308 | #endif |
4309 | #ifdef CONFIG_IPV6_MROUTE | |
4310 | { | |
4311 | .ctl_name = CTL_UNNUMBERED, | |
4312 | .procname = "mc_forwarding", | |
4313 | .data = &ipv6_devconf.mc_forwarding, | |
4314 | .maxlen = sizeof(int), | |
a4e6db07 | 4315 | .mode = 0444, |
6d9f239a | 4316 | .proc_handler = proc_dointvec, |
7bc570c8 | 4317 | }, |
95c385b4 | 4318 | #endif |
778d80be YH |
4319 | { |
4320 | .ctl_name = CTL_UNNUMBERED, | |
4321 | .procname = "disable_ipv6", | |
4322 | .data = &ipv6_devconf.disable_ipv6, | |
4323 | .maxlen = sizeof(int), | |
4324 | .mode = 0644, | |
56d417b1 BH |
4325 | .proc_handler = addrconf_sysctl_disable, |
4326 | .strategy = sysctl_intvec, | |
778d80be | 4327 | }, |
1b34be74 YH |
4328 | { |
4329 | .ctl_name = CTL_UNNUMBERED, | |
4330 | .procname = "accept_dad", | |
4331 | .data = &ipv6_devconf.accept_dad, | |
4332 | .maxlen = sizeof(int), | |
4333 | .mode = 0644, | |
6d9f239a | 4334 | .proc_handler = proc_dointvec, |
1b34be74 | 4335 | }, |
1da177e4 LT |
4336 | { |
4337 | .ctl_name = 0, /* sentinel */ | |
4338 | } | |
4339 | }, | |
1da177e4 LT |
4340 | }; |
4341 | ||
bff16c2f PE |
4342 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4343 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4344 | { |
4345 | int i; | |
1da177e4 | 4346 | struct addrconf_sysctl_table *t; |
1da177e4 | 4347 | |
1dab6222 PE |
4348 | #define ADDRCONF_CTL_PATH_DEV 3 |
4349 | ||
4350 | struct ctl_path addrconf_ctl_path[] = { | |
4351 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4352 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4353 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4354 | { /* to be set */ }, | |
4355 | { }, | |
4356 | }; | |
4357 | ||
4358 | ||
af879cc7 | 4359 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4360 | if (t == NULL) |
f68635e6 PE |
4361 | goto out; |
4362 | ||
1da177e4 LT |
4363 | for (i=0; t->addrconf_vars[i].data; i++) { |
4364 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4365 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4366 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4367 | } |
1da177e4 | 4368 | |
1ab1457c YH |
4369 | /* |
4370 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4371 | * by sysctl and we wouldn't want anyone to change it under our feet |
4372 | * (see SIOCSIFNAME). | |
1ab1457c | 4373 | */ |
1dab6222 PE |
4374 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4375 | if (!t->dev_name) | |
f68635e6 | 4376 | goto free; |
1da177e4 | 4377 | |
1dab6222 PE |
4378 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4379 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4380 | |
bff16c2f | 4381 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4382 | t->addrconf_vars); |
1da177e4 LT |
4383 | if (t->sysctl_header == NULL) |
4384 | goto free_procname; | |
f68635e6 PE |
4385 | |
4386 | p->sysctl = t; | |
95897312 | 4387 | return 0; |
1da177e4 | 4388 | |
f68635e6 | 4389 | free_procname: |
1dab6222 | 4390 | kfree(t->dev_name); |
f68635e6 | 4391 | free: |
1da177e4 | 4392 | kfree(t); |
f68635e6 | 4393 | out: |
95897312 | 4394 | return -ENOBUFS; |
1da177e4 LT |
4395 | } |
4396 | ||
408c4768 PE |
4397 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4398 | { | |
4399 | struct addrconf_sysctl_table *t; | |
4400 | ||
4401 | if (p->sysctl == NULL) | |
4402 | return; | |
4403 | ||
4404 | t = p->sysctl; | |
4405 | p->sysctl = NULL; | |
4406 | unregister_sysctl_table(t->sysctl_header); | |
4407 | kfree(t->dev_name); | |
4408 | kfree(t); | |
4409 | } | |
4410 | ||
f52295a9 PE |
4411 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4412 | { | |
408c4768 PE |
4413 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4414 | NET_IPV6_NEIGH, "ipv6", | |
4415 | &ndisc_ifinfo_sysctl_change, | |
0686caa3 | 4416 | ndisc_ifinfo_sysctl_strategy); |
c346dca1 | 4417 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
bff16c2f | 4418 | idev->dev->ifindex, idev, &idev->cnf); |
f52295a9 PE |
4419 | } |
4420 | ||
408c4768 | 4421 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4422 | { |
408c4768 PE |
4423 | __addrconf_sysctl_unregister(&idev->cnf); |
4424 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4425 | } |
4426 | ||
4427 | ||
4428 | #endif | |
4429 | ||
e0da5a48 PE |
4430 | static int addrconf_init_net(struct net *net) |
4431 | { | |
4432 | int err; | |
4433 | struct ipv6_devconf *all, *dflt; | |
4434 | ||
4435 | err = -ENOMEM; | |
4436 | all = &ipv6_devconf; | |
4437 | dflt = &ipv6_devconf_dflt; | |
4438 | ||
4439 | if (net != &init_net) { | |
4440 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); | |
4441 | if (all == NULL) | |
4442 | goto err_alloc_all; | |
4443 | ||
4444 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4445 | if (dflt == NULL) | |
4446 | goto err_alloc_dflt; | |
56d417b1 BH |
4447 | } else { |
4448 | /* these will be inherited by all namespaces */ | |
4449 | dflt->autoconf = ipv6_defaults.autoconf; | |
4450 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4451 | } |
4452 | ||
4453 | net->ipv6.devconf_all = all; | |
4454 | net->ipv6.devconf_dflt = dflt; | |
4455 | ||
4456 | #ifdef CONFIG_SYSCTL | |
4457 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, | |
4458 | NULL, all); | |
4459 | if (err < 0) | |
4460 | goto err_reg_all; | |
4461 | ||
4462 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, | |
4463 | NULL, dflt); | |
4464 | if (err < 0) | |
4465 | goto err_reg_dflt; | |
4466 | #endif | |
4467 | return 0; | |
4468 | ||
4469 | #ifdef CONFIG_SYSCTL | |
4470 | err_reg_dflt: | |
4471 | __addrconf_sysctl_unregister(all); | |
4472 | err_reg_all: | |
4473 | kfree(dflt); | |
4474 | #endif | |
4475 | err_alloc_dflt: | |
4476 | kfree(all); | |
4477 | err_alloc_all: | |
4478 | return err; | |
4479 | } | |
4480 | ||
4481 | static void addrconf_exit_net(struct net *net) | |
4482 | { | |
4483 | #ifdef CONFIG_SYSCTL | |
4484 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4485 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4486 | #endif | |
4487 | if (net != &init_net) { | |
4488 | kfree(net->ipv6.devconf_dflt); | |
4489 | kfree(net->ipv6.devconf_all); | |
4490 | } | |
4491 | } | |
4492 | ||
4493 | static struct pernet_operations addrconf_ops = { | |
4494 | .init = addrconf_init_net, | |
4495 | .exit = addrconf_exit_net, | |
4496 | }; | |
4497 | ||
1da177e4 LT |
4498 | /* |
4499 | * Device notifier | |
4500 | */ | |
4501 | ||
4502 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4503 | { | |
1ab1457c | 4504 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4505 | } |
4506 | ||
7159039a YH |
4507 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4508 | ||
1da177e4 LT |
4509 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4510 | { | |
1ab1457c | 4511 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4512 | } |
4513 | ||
7159039a YH |
4514 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4515 | ||
1da177e4 LT |
4516 | /* |
4517 | * Init / cleanup code | |
4518 | */ | |
4519 | ||
4520 | int __init addrconf_init(void) | |
4521 | { | |
2a8cc6c8 YH |
4522 | int err; |
4523 | ||
4524 | if ((err = ipv6_addr_label_init()) < 0) { | |
4525 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4526 | err); | |
4527 | return err; | |
4528 | } | |
1da177e4 | 4529 | |
e0da5a48 PE |
4530 | register_pernet_subsys(&addrconf_ops); |
4531 | ||
1da177e4 LT |
4532 | /* The addrconf netdev notifier requires that loopback_dev |
4533 | * has it's ipv6 private information allocated and setup | |
4534 | * before it can bring up and give link-local addresses | |
4535 | * to other devices which are up. | |
4536 | * | |
4537 | * Unfortunately, loopback_dev is not necessarily the first | |
4538 | * entry in the global dev_base list of net devices. In fact, | |
4539 | * it is likely to be the very last entry on that list. | |
4540 | * So this causes the notifier registry below to try and | |
4541 | * give link-local addresses to all devices besides loopback_dev | |
4542 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4543 | * devices to fail to get a link-local address. | |
4544 | * | |
4545 | * So, as a temporary fix, allocate the ipv6 structure for | |
4546 | * loopback_dev first by hand. | |
4547 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4548 | * device and it being up should be removed. | |
4549 | */ | |
4550 | rtnl_lock(); | |
2774c7ab | 4551 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4552 | err = -ENOMEM; |
4553 | rtnl_unlock(); | |
4554 | if (err) | |
e0da5a48 | 4555 | goto errlo; |
1da177e4 LT |
4556 | |
4557 | register_netdevice_notifier(&ipv6_dev_notf); | |
4558 | ||
1da177e4 | 4559 | addrconf_verify(0); |
c127ea2c TG |
4560 | |
4561 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4562 | if (err < 0) | |
4563 | goto errout; | |
4564 | ||
4565 | /* Only the first call to __rtnl_register can fail */ | |
4566 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4567 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4568 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4569 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4570 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4571 | ||
2a8cc6c8 YH |
4572 | ipv6_addr_label_rtnl_register(); |
4573 | ||
1da177e4 | 4574 | return 0; |
c127ea2c TG |
4575 | errout: |
4576 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4577 | errlo: |
4578 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4579 | |
4580 | return err; | |
1da177e4 LT |
4581 | } |
4582 | ||
09f7709f | 4583 | void addrconf_cleanup(void) |
1da177e4 | 4584 | { |
1ab1457c | 4585 | struct inet6_ifaddr *ifa; |
176c39af | 4586 | struct net_device *dev; |
1da177e4 LT |
4587 | int i; |
4588 | ||
4589 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4590 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4591 | |
4592 | rtnl_lock(); | |
4593 | ||
176c39af DL |
4594 | /* clean dev list */ |
4595 | for_each_netdev(&init_net, dev) { | |
4596 | if (__in6_dev_get(dev) == NULL) | |
4597 | continue; | |
4598 | addrconf_ifdown(dev, 1); | |
4599 | } | |
4600 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4601 | ||
1da177e4 LT |
4602 | /* |
4603 | * Check hash table. | |
4604 | */ | |
1da177e4 LT |
4605 | write_lock_bh(&addrconf_hash_lock); |
4606 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4607 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4608 | struct inet6_ifaddr *bifa; | |
4609 | ||
4610 | bifa = ifa; | |
4611 | ifa = ifa->lst_next; | |
4612 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4613 | /* Do not free it; something is wrong. | |
4614 | Now we can investigate it with debugger. | |
4615 | */ | |
4616 | } | |
4617 | } | |
4618 | write_unlock_bh(&addrconf_hash_lock); | |
4619 | ||
4620 | del_timer(&addr_chk_timer); | |
1da177e4 | 4621 | rtnl_unlock(); |
1da177e4 | 4622 | } |