Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
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 | ||
e21e8467 | 84 | #include <linux/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 | |
e21e8467 | 100 | #define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b))) |
1da177e4 LT |
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 | */ | |
c2e21293 | 129 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 130 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 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 | ||
93d9b7d7 JP |
140 | static void addrconf_type_change(struct net_device *dev, |
141 | unsigned long event); | |
1da177e4 LT |
142 | static int addrconf_ifdown(struct net_device *dev, int how); |
143 | ||
e431b8c0 | 144 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
145 | static void addrconf_dad_timer(unsigned long data); |
146 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 147 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
148 | static void addrconf_rs_timer(unsigned long data); |
149 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
150 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
151 | ||
1ab1457c | 152 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 153 | struct prefix_info *pinfo); |
06bfe655 DL |
154 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
155 | struct net_device *dev); | |
1da177e4 | 156 | |
e041c683 | 157 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 158 | |
888c848e | 159 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
160 | .forwarding = 0, |
161 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
162 | .mtu6 = IPV6_MIN_MTU, | |
163 | .accept_ra = 1, | |
164 | .accept_redirects = 1, | |
165 | .autoconf = 1, | |
166 | .force_mld_version = 0, | |
167 | .dad_transmits = 1, | |
168 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
169 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
170 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
171 | #ifdef CONFIG_IPV6_PRIVACY | |
172 | .use_tempaddr = 0, | |
173 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
174 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
175 | .regen_max_retry = REGEN_MAX_RETRY, | |
176 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
177 | #endif | |
178 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 179 | .accept_ra_defrtr = 1, |
c4fd30eb | 180 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
181 | #ifdef CONFIG_IPV6_ROUTER_PREF |
182 | .accept_ra_rtr_pref = 1, | |
52e16356 | 183 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
184 | #ifdef CONFIG_IPV6_ROUTE_INFO |
185 | .accept_ra_rt_info_max_plen = 0, | |
186 | #endif | |
930d6ff2 | 187 | #endif |
fbea49e1 | 188 | .proxy_ndp = 0, |
0bcbc926 | 189 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 190 | .disable_ipv6 = 0, |
1b34be74 | 191 | .accept_dad = 1, |
1da177e4 LT |
192 | }; |
193 | ||
ab32ea5d | 194 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
195 | .forwarding = 0, |
196 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
197 | .mtu6 = IPV6_MIN_MTU, | |
198 | .accept_ra = 1, | |
199 | .accept_redirects = 1, | |
200 | .autoconf = 1, | |
201 | .dad_transmits = 1, | |
202 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
203 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
204 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
205 | #ifdef CONFIG_IPV6_PRIVACY | |
206 | .use_tempaddr = 0, | |
207 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
208 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
209 | .regen_max_retry = REGEN_MAX_RETRY, | |
210 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
211 | #endif | |
212 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 213 | .accept_ra_defrtr = 1, |
c4fd30eb | 214 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
215 | #ifdef CONFIG_IPV6_ROUTER_PREF |
216 | .accept_ra_rtr_pref = 1, | |
52e16356 | 217 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
218 | #ifdef CONFIG_IPV6_ROUTE_INFO |
219 | .accept_ra_rt_info_max_plen = 0, | |
220 | #endif | |
930d6ff2 | 221 | #endif |
fbea49e1 | 222 | .proxy_ndp = 0, |
0bcbc926 | 223 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 224 | .disable_ipv6 = 0, |
1b34be74 | 225 | .accept_dad = 1, |
1da177e4 LT |
226 | }; |
227 | ||
228 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 229 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 230 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
231 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
232 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 233 | |
f24e3d65 | 234 | /* Check if a valid qdisc is available */ |
05297949 | 235 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 236 | { |
05297949 | 237 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
238 | } |
239 | ||
2b5ead46 YH |
240 | /* Check if a route is valid prefix route */ |
241 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
242 | { | |
243 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); | |
244 | } | |
245 | ||
1da177e4 LT |
246 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
247 | { | |
248 | if (del_timer(&ifp->timer)) | |
249 | __in6_ifa_put(ifp); | |
250 | } | |
251 | ||
e21e8467 | 252 | enum addrconf_timer_t { |
1da177e4 LT |
253 | AC_NONE, |
254 | AC_DAD, | |
255 | AC_RS, | |
256 | }; | |
257 | ||
258 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
259 | enum addrconf_timer_t what, | |
260 | unsigned long when) | |
261 | { | |
262 | if (!del_timer(&ifp->timer)) | |
263 | in6_ifa_hold(ifp); | |
264 | ||
265 | switch (what) { | |
266 | case AC_DAD: | |
267 | ifp->timer.function = addrconf_dad_timer; | |
268 | break; | |
269 | case AC_RS: | |
270 | ifp->timer.function = addrconf_rs_timer; | |
271 | break; | |
e21e8467 SH |
272 | default: |
273 | break; | |
1da177e4 LT |
274 | } |
275 | ifp->timer.expires = jiffies + when; | |
276 | add_timer(&ifp->timer); | |
277 | } | |
278 | ||
7f7d9a6b HX |
279 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
280 | { | |
7d720c3e | 281 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
c69bce20 | 282 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b | 283 | goto err_ip; |
7d720c3e | 284 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6, |
c69bce20 | 285 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 286 | goto err_icmp; |
7d720c3e | 287 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg, |
c69bce20 | 288 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 289 | goto err_icmpmsg; |
7f7d9a6b HX |
290 | |
291 | return 0; | |
292 | ||
14878f75 | 293 | err_icmpmsg: |
7d720c3e | 294 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); |
7f7d9a6b | 295 | err_icmp: |
7d720c3e | 296 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 297 | err_ip: |
aaf70ec7 | 298 | return -ENOMEM; |
7f7d9a6b HX |
299 | } |
300 | ||
16910b98 | 301 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 302 | { |
7d720c3e TH |
303 | snmp_mib_free((void __percpu **)idev->stats.icmpv6msg); |
304 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); | |
305 | snmp_mib_free((void __percpu **)idev->stats.ipv6); | |
7f7d9a6b HX |
306 | } |
307 | ||
1da177e4 LT |
308 | /* Nobody refers to this device, we may destroy it. */ |
309 | ||
8814c4b5 YH |
310 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
311 | { | |
312 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
313 | kfree(idev); | |
314 | } | |
315 | ||
1da177e4 LT |
316 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
317 | { | |
318 | struct net_device *dev = idev->dev; | |
547b792c | 319 | |
502a2ffd | 320 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c IJ |
321 | WARN_ON(idev->mc_list != NULL); |
322 | ||
1da177e4 LT |
323 | #ifdef NET_REFCNT_DEBUG |
324 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
325 | #endif | |
326 | dev_put(dev); | |
327 | if (!idev->dead) { | |
e21e8467 | 328 | pr_warning("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
329 | return; |
330 | } | |
331 | snmp6_free_dev(idev); | |
8814c4b5 | 332 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
333 | } |
334 | ||
7159039a YH |
335 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
336 | ||
1da177e4 LT |
337 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
338 | { | |
339 | struct inet6_dev *ndev; | |
340 | ||
341 | ASSERT_RTNL(); | |
342 | ||
343 | if (dev->mtu < IPV6_MIN_MTU) | |
344 | return NULL; | |
345 | ||
1ab1457c | 346 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 347 | |
1ab1457c YH |
348 | if (ndev == NULL) |
349 | return NULL; | |
322f74a4 IO |
350 | |
351 | rwlock_init(&ndev->lock); | |
352 | ndev->dev = dev; | |
502a2ffd | 353 | INIT_LIST_HEAD(&ndev->addr_list); |
354 | ||
c346dca1 | 355 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
356 | ndev->cnf.mtu6 = dev->mtu; |
357 | ndev->cnf.sysctl = NULL; | |
358 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
359 | if (ndev->nd_parms == NULL) { | |
360 | kfree(ndev); | |
361 | return NULL; | |
362 | } | |
0187bdfb BH |
363 | if (ndev->cnf.forwarding) |
364 | dev_disable_lro(dev); | |
322f74a4 IO |
365 | /* We refer to the device */ |
366 | dev_hold(dev); | |
1da177e4 | 367 | |
322f74a4 IO |
368 | if (snmp6_alloc_dev(ndev) < 0) { |
369 | ADBG((KERN_WARNING | |
370 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 371 | __func__, dev->name)); |
322f74a4 IO |
372 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
373 | ndev->dead = 1; | |
374 | in6_dev_finish_destroy(ndev); | |
375 | return NULL; | |
376 | } | |
1da177e4 | 377 | |
322f74a4 IO |
378 | if (snmp6_register_dev(ndev) < 0) { |
379 | ADBG((KERN_WARNING | |
380 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 381 | __func__, dev->name)); |
322f74a4 IO |
382 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
383 | ndev->dead = 1; | |
384 | in6_dev_finish_destroy(ndev); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | /* One reference from device. We must do this before | |
389 | * we invoke __ipv6_regen_rndid(). | |
390 | */ | |
391 | in6_dev_hold(ndev); | |
1da177e4 | 392 | |
1b34be74 YH |
393 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
394 | ndev->cnf.accept_dad = -1; | |
395 | ||
b077d7ab YH |
396 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
397 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
398 | printk(KERN_INFO | |
399 | "%s: Disabled Multicast RS\n", | |
400 | dev->name); | |
401 | ndev->cnf.rtr_solicits = 0; | |
402 | } | |
403 | #endif | |
404 | ||
1da177e4 | 405 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 406 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 407 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
408 | if ((dev->flags&IFF_LOOPBACK) || |
409 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 410 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 411 | dev->type == ARPHRD_SIT || |
0be669bb | 412 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
413 | printk(KERN_INFO |
414 | "%s: Disabled Privacy Extensions\n", | |
415 | dev->name); | |
416 | ndev->cnf.use_tempaddr = -1; | |
417 | } else { | |
418 | in6_dev_hold(ndev); | |
419 | ipv6_regen_rndid((unsigned long) ndev); | |
420 | } | |
1da177e4 LT |
421 | #endif |
422 | ||
f24e3d65 | 423 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
424 | ndev->if_flags |= IF_READY; |
425 | ||
322f74a4 IO |
426 | ipv6_mc_init_dev(ndev); |
427 | ndev->tstamp = jiffies; | |
f52295a9 | 428 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
429 | /* protected by rtnl_lock */ |
430 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
431 | |
432 | /* Join all-node multicast group */ | |
f3ee4010 | 433 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 434 | |
1da177e4 LT |
435 | return ndev; |
436 | } | |
437 | ||
cee89473 | 438 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
439 | { |
440 | struct inet6_dev *idev; | |
441 | ||
442 | ASSERT_RTNL(); | |
443 | ||
e21e8467 SH |
444 | idev = __in6_dev_get(dev); |
445 | if (!idev) { | |
446 | idev = ipv6_add_dev(dev); | |
447 | if (!idev) | |
1da177e4 LT |
448 | return NULL; |
449 | } | |
c5e33bdd | 450 | |
1da177e4 LT |
451 | if (dev->flags&IFF_UP) |
452 | ipv6_mc_up(idev); | |
453 | return idev; | |
454 | } | |
455 | ||
456 | #ifdef CONFIG_SYSCTL | |
457 | static void dev_forward_change(struct inet6_dev *idev) | |
458 | { | |
459 | struct net_device *dev; | |
460 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
461 | |
462 | if (!idev) | |
463 | return; | |
464 | dev = idev->dev; | |
0187bdfb BH |
465 | if (idev->cnf.forwarding) |
466 | dev_disable_lro(dev); | |
1da177e4 | 467 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 468 | if (idev->cnf.forwarding) |
f3ee4010 | 469 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 470 | else |
f3ee4010 | 471 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 472 | } |
502a2ffd | 473 | |
474 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
475 | if (ifa->flags&IFA_F_TENTATIVE) |
476 | continue; | |
1da177e4 LT |
477 | if (idev->cnf.forwarding) |
478 | addrconf_join_anycast(ifa); | |
479 | else | |
480 | addrconf_leave_anycast(ifa); | |
481 | } | |
482 | } | |
483 | ||
484 | ||
e186932b | 485 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
486 | { |
487 | struct net_device *dev; | |
488 | struct inet6_dev *idev; | |
489 | ||
c6d14c84 ED |
490 | rcu_read_lock(); |
491 | for_each_netdev_rcu(net, dev) { | |
1da177e4 LT |
492 | idev = __in6_dev_get(dev); |
493 | if (idev) { | |
e186932b PE |
494 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
495 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
496 | if (changed) |
497 | dev_forward_change(idev); | |
498 | } | |
1da177e4 | 499 | } |
c6d14c84 | 500 | rcu_read_unlock(); |
1da177e4 | 501 | } |
c8fecf22 | 502 | |
b325fddb | 503 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf22 | 504 | { |
bff16c2f PE |
505 | struct net *net; |
506 | ||
507 | net = (struct net *)table->extra2; | |
441fc2a2 | 508 | if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb SH |
509 | return 0; |
510 | ||
88af182e EB |
511 | if (!rtnl_trylock()) { |
512 | /* Restore the original values before restarting */ | |
513 | *p = old; | |
5007392d | 514 | return restart_syscall(); |
88af182e | 515 | } |
c8fecf22 | 516 | |
e186932b PE |
517 | if (p == &net->ipv6.devconf_all->forwarding) { |
518 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
519 | net->ipv6.devconf_dflt->forwarding = newf; | |
520 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
521 | } else if ((!*p) ^ (!old)) |
522 | dev_forward_change((struct inet6_dev *)table->extra1); | |
0187bdfb | 523 | rtnl_unlock(); |
c8fecf22 PE |
524 | |
525 | if (*p) | |
7b4da532 | 526 | rt6_purge_dflt_routers(net); |
b325fddb | 527 | return 1; |
c8fecf22 | 528 | } |
1da177e4 LT |
529 | #endif |
530 | ||
5c578aed | 531 | static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head) |
532 | { | |
533 | struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu); | |
534 | kfree(ifp); | |
535 | } | |
1da177e4 | 536 | |
5c578aed | 537 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
538 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
539 | { | |
c2e21293 | 540 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 541 | |
1da177e4 LT |
542 | #ifdef NET_REFCNT_DEBUG |
543 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
544 | #endif | |
545 | ||
546 | in6_dev_put(ifp->idev); | |
547 | ||
548 | if (del_timer(&ifp->timer)) | |
e21e8467 | 549 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 LT |
550 | |
551 | if (!ifp->dead) { | |
e21e8467 | 552 | pr_warning("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
553 | return; |
554 | } | |
555 | dst_release(&ifp->rt->u.dst); | |
556 | ||
5c578aed | 557 | call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu); |
1da177e4 LT |
558 | } |
559 | ||
e55ffac6 BH |
560 | static void |
561 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
562 | { | |
502a2ffd | 563 | struct list_head *p; |
8a6ce0c0 | 564 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
565 | |
566 | /* | |
567 | * Each device address list is sorted in order of scope - | |
568 | * global before linklocal. | |
569 | */ | |
502a2ffd | 570 | list_for_each(p, &idev->addr_list) { |
571 | struct inet6_ifaddr *ifa | |
572 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 573 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
574 | break; |
575 | } | |
576 | ||
502a2ffd | 577 | list_add(&ifp->if_list, p); |
e55ffac6 BH |
578 | } |
579 | ||
3a88a81d | 580 | static u32 ipv6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 581 | { |
3eb84f49 YH |
582 | /* |
583 | * We perform the hash function over the last 64 bits of the address | |
584 | * This will include the IEEE address token on links that support it. | |
585 | */ | |
3a88a81d | 586 | return jhash_2words(addr->s6_addr32[2], addr->s6_addr32[3], 0) |
587 | & (IN6_ADDR_HSIZE - 1); | |
3eb84f49 YH |
588 | } |
589 | ||
1da177e4 LT |
590 | /* On success it returns ifp with increased reference count */ |
591 | ||
592 | static struct inet6_ifaddr * | |
593 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 594 | int scope, u32 flags) |
1da177e4 LT |
595 | { |
596 | struct inet6_ifaddr *ifa = NULL; | |
597 | struct rt6_info *rt; | |
3a88a81d | 598 | unsigned int hash; |
1da177e4 | 599 | int err = 0; |
d68b8270 YH |
600 | int addr_type = ipv6_addr_type(addr); |
601 | ||
602 | if (addr_type == IPV6_ADDR_ANY || | |
603 | addr_type & IPV6_ADDR_MULTICAST || | |
604 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
605 | addr_type & IPV6_ADDR_LOOPBACK)) | |
606 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 607 | |
8814c4b5 | 608 | rcu_read_lock_bh(); |
1da177e4 LT |
609 | if (idev->dead) { |
610 | err = -ENODEV; /*XXX*/ | |
611 | goto out2; | |
612 | } | |
613 | ||
56d417b1 | 614 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
615 | err = -EACCES; |
616 | goto out2; | |
617 | } | |
618 | ||
5c578aed | 619 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
620 | |
621 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 622 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
623 | ADBG(("ipv6_add_addr: already assigned\n")); |
624 | err = -EEXIST; | |
625 | goto out; | |
626 | } | |
627 | ||
322f74a4 | 628 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
629 | |
630 | if (ifa == NULL) { | |
631 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
632 | err = -ENOBUFS; | |
633 | goto out; | |
634 | } | |
635 | ||
636 | rt = addrconf_dst_alloc(idev, addr, 0); | |
637 | if (IS_ERR(rt)) { | |
638 | err = PTR_ERR(rt); | |
639 | goto out; | |
640 | } | |
641 | ||
1da177e4 LT |
642 | ipv6_addr_copy(&ifa->addr, addr); |
643 | ||
644 | spin_lock_init(&ifa->lock); | |
645 | init_timer(&ifa->timer); | |
c2e21293 | 646 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
647 | ifa->timer.data = (unsigned long) ifa; |
648 | ifa->scope = scope; | |
649 | ifa->prefix_len = pfxlen; | |
650 | ifa->flags = flags | IFA_F_TENTATIVE; | |
651 | ifa->cstamp = ifa->tstamp = jiffies; | |
652 | ||
57f5f544 KF |
653 | ifa->rt = rt; |
654 | ||
95c385b4 NH |
655 | /* |
656 | * part one of RFC 4429, section 3.3 | |
657 | * We should not configure an address as | |
658 | * optimistic if we do not yet know the link | |
659 | * layer address of our nexhop router | |
660 | */ | |
661 | ||
662 | if (rt->rt6i_nexthop == NULL) | |
663 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
664 | ||
1da177e4 LT |
665 | ifa->idev = idev; |
666 | in6_dev_hold(idev); | |
667 | /* For caller */ | |
668 | in6_ifa_hold(ifa); | |
669 | ||
670 | /* Add to big hash table */ | |
671 | hash = ipv6_addr_hash(addr); | |
672 | ||
5c578aed | 673 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
1da177e4 | 674 | in6_ifa_hold(ifa); |
5c578aed | 675 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
676 | |
677 | write_lock(&idev->lock); | |
678 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 679 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
680 | |
681 | #ifdef CONFIG_IPV6_PRIVACY | |
682 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 683 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
684 | in6_ifa_hold(ifa); |
685 | } | |
686 | #endif | |
687 | ||
1da177e4 LT |
688 | in6_ifa_hold(ifa); |
689 | write_unlock(&idev->lock); | |
690 | out2: | |
8814c4b5 | 691 | rcu_read_unlock_bh(); |
1da177e4 | 692 | |
fd92833a | 693 | if (likely(err == 0)) |
e041c683 | 694 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
695 | else { |
696 | kfree(ifa); | |
697 | ifa = ERR_PTR(err); | |
698 | } | |
699 | ||
700 | return ifa; | |
701 | out: | |
5c578aed | 702 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
703 | goto out2; |
704 | } | |
705 | ||
706 | /* This function wants to get referenced ifp and releases it before return */ | |
707 | ||
708 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
709 | { | |
502a2ffd | 710 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 LT |
711 | struct inet6_dev *idev = ifp->idev; |
712 | int hash; | |
713 | int deleted = 0, onlink = 0; | |
714 | unsigned long expires = jiffies; | |
715 | ||
716 | hash = ipv6_addr_hash(&ifp->addr); | |
717 | ||
718 | ifp->dead = 1; | |
719 | ||
5c578aed | 720 | spin_lock_bh(&addrconf_hash_lock); |
721 | hlist_del_init_rcu(&ifp->addr_lst); | |
c2e21293 | 722 | __in6_ifa_put(ifp); |
5c578aed | 723 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
724 | |
725 | write_lock_bh(&idev->lock); | |
726 | #ifdef CONFIG_IPV6_PRIVACY | |
727 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 728 | list_del(&ifp->tmp_list); |
729 | if (ifp->ifpub) { | |
730 | in6_ifa_put(ifp->ifpub); | |
731 | ifp->ifpub = NULL; | |
1da177e4 | 732 | } |
372e6c8f | 733 | __in6_ifa_put(ifp); |
1da177e4 LT |
734 | } |
735 | #endif | |
736 | ||
502a2ffd | 737 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 738 | if (ifa == ifp) { |
502a2ffd | 739 | list_del_init(&ifp->if_list); |
1da177e4 | 740 | __in6_ifa_put(ifp); |
502a2ffd | 741 | |
1da177e4 LT |
742 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
743 | break; | |
744 | deleted = 1; | |
1d142804 | 745 | continue; |
1da177e4 LT |
746 | } else if (ifp->flags & IFA_F_PERMANENT) { |
747 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
748 | ifp->prefix_len)) { | |
749 | if (ifa->flags & IFA_F_PERMANENT) { | |
750 | onlink = 1; | |
751 | if (deleted) | |
752 | break; | |
753 | } else { | |
754 | unsigned long lifetime; | |
755 | ||
756 | if (!onlink) | |
757 | onlink = -1; | |
758 | ||
759 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
760 | |
761 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
762 | /* | |
763 | * Note: Because this address is | |
764 | * not permanent, lifetime < | |
765 | * LONG_MAX / HZ here. | |
766 | */ | |
1da177e4 LT |
767 | if (time_before(expires, |
768 | ifa->tstamp + lifetime * HZ)) | |
769 | expires = ifa->tstamp + lifetime * HZ; | |
770 | spin_unlock(&ifa->lock); | |
771 | } | |
772 | } | |
773 | } | |
774 | } | |
775 | write_unlock_bh(&idev->lock); | |
776 | ||
b2238566 AV |
777 | addrconf_del_timer(ifp); |
778 | ||
1da177e4 LT |
779 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
780 | ||
e041c683 | 781 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 782 | |
1da177e4 LT |
783 | /* |
784 | * Purge or update corresponding prefix | |
785 | * | |
786 | * 1) we don't purge prefix here if address was not permanent. | |
787 | * prefix is managed by its own lifetime. | |
788 | * 2) if there're no addresses, delete prefix. | |
789 | * 3) if there're still other permanent address(es), | |
790 | * corresponding prefix is still permanent. | |
791 | * 4) otherwise, update prefix lifetime to the | |
792 | * longest valid lifetime among the corresponding | |
793 | * addresses on the device. | |
794 | * Note: subsequent RA will update lifetime. | |
795 | * | |
796 | * --yoshfuji | |
797 | */ | |
798 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
799 | struct in6_addr prefix; | |
800 | struct rt6_info *rt; | |
c346dca1 | 801 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 802 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 803 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 804 | |
2b5ead46 | 805 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 806 | if (onlink == 0) { |
e0a1ad73 | 807 | ip6_del_rt(rt); |
1da177e4 LT |
808 | rt = NULL; |
809 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
810 | rt->rt6i_expires = expires; | |
811 | rt->rt6i_flags |= RTF_EXPIRES; | |
812 | } | |
813 | } | |
814 | dst_release(&rt->u.dst); | |
815 | } | |
816 | ||
817 | in6_ifa_put(ifp); | |
818 | } | |
819 | ||
820 | #ifdef CONFIG_IPV6_PRIVACY | |
821 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
822 | { | |
823 | struct inet6_dev *idev = ifp->idev; | |
824 | struct in6_addr addr, *tmpaddr; | |
825 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 826 | unsigned long regen_advance; |
1da177e4 LT |
827 | int tmp_plen; |
828 | int ret = 0; | |
829 | int max_addresses; | |
95c385b4 | 830 | u32 addr_flags; |
1da177e4 LT |
831 | |
832 | write_lock(&idev->lock); | |
833 | if (ift) { | |
834 | spin_lock_bh(&ift->lock); | |
835 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
836 | spin_unlock_bh(&ift->lock); | |
837 | tmpaddr = &addr; | |
838 | } else { | |
839 | tmpaddr = NULL; | |
840 | } | |
841 | retry: | |
842 | in6_dev_hold(idev); | |
843 | if (idev->cnf.use_tempaddr <= 0) { | |
844 | write_unlock(&idev->lock); | |
845 | printk(KERN_INFO | |
846 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
847 | in6_dev_put(idev); | |
848 | ret = -1; | |
849 | goto out; | |
850 | } | |
851 | spin_lock_bh(&ifp->lock); | |
852 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
853 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
854 | spin_unlock_bh(&ifp->lock); | |
855 | write_unlock(&idev->lock); | |
856 | printk(KERN_WARNING | |
857 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
858 | in6_dev_put(idev); | |
859 | ret = -1; | |
860 | goto out; | |
861 | } | |
862 | in6_ifa_hold(ifp); | |
863 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
864 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
865 | spin_unlock_bh(&ifp->lock); | |
866 | write_unlock(&idev->lock); | |
867 | printk(KERN_WARNING | |
868 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
869 | in6_ifa_put(ifp); | |
870 | in6_dev_put(idev); | |
871 | ret = -1; | |
872 | goto out; | |
873 | } | |
874 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
875 | tmp_valid_lft = min_t(__u32, | |
876 | ifp->valid_lft, | |
877 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
878 | tmp_prefered_lft = min_t(__u32, |
879 | ifp->prefered_lft, | |
1da177e4 LT |
880 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
881 | tmp_plen = ifp->prefix_len; | |
882 | max_addresses = idev->cnf.max_addresses; | |
883 | tmp_cstamp = ifp->cstamp; | |
884 | tmp_tstamp = ifp->tstamp; | |
885 | spin_unlock_bh(&ifp->lock); | |
886 | ||
eac55bf9 BB |
887 | regen_advance = idev->cnf.regen_max_retry * |
888 | idev->cnf.dad_transmits * | |
889 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 890 | write_unlock(&idev->lock); |
95c385b4 | 891 | |
eac55bf9 BB |
892 | /* A temporary address is created only if this calculated Preferred |
893 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
894 | * an implementation must not create a temporary address with a zero | |
895 | * Preferred Lifetime. | |
896 | */ | |
897 | if (tmp_prefered_lft <= regen_advance) { | |
898 | in6_ifa_put(ifp); | |
899 | in6_dev_put(idev); | |
900 | ret = -1; | |
901 | goto out; | |
902 | } | |
903 | ||
95c385b4 NH |
904 | addr_flags = IFA_F_TEMPORARY; |
905 | /* set in addrconf_prefix_rcv() */ | |
906 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
907 | addr_flags |= IFA_F_OPTIMISTIC; | |
908 | ||
1da177e4 | 909 | ift = !max_addresses || |
1ab1457c | 910 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 911 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
912 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
913 | addr_flags) : NULL; | |
1da177e4 LT |
914 | if (!ift || IS_ERR(ift)) { |
915 | in6_ifa_put(ifp); | |
916 | in6_dev_put(idev); | |
917 | printk(KERN_INFO | |
918 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
919 | tmpaddr = &addr; | |
920 | write_lock(&idev->lock); | |
921 | goto retry; | |
922 | } | |
923 | ||
924 | spin_lock_bh(&ift->lock); | |
925 | ift->ifpub = ifp; | |
926 | ift->valid_lft = tmp_valid_lft; | |
927 | ift->prefered_lft = tmp_prefered_lft; | |
928 | ift->cstamp = tmp_cstamp; | |
929 | ift->tstamp = tmp_tstamp; | |
930 | spin_unlock_bh(&ift->lock); | |
931 | ||
932 | addrconf_dad_start(ift, 0); | |
933 | in6_ifa_put(ift); | |
934 | in6_dev_put(idev); | |
935 | out: | |
936 | return ret; | |
937 | } | |
938 | #endif | |
939 | ||
940 | /* | |
072047e4 | 941 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 942 | */ |
a9b05723 YH |
943 | enum { |
944 | IPV6_SADDR_RULE_INIT = 0, | |
945 | IPV6_SADDR_RULE_LOCAL, | |
946 | IPV6_SADDR_RULE_SCOPE, | |
947 | IPV6_SADDR_RULE_PREFERRED, | |
948 | #ifdef CONFIG_IPV6_MIP6 | |
949 | IPV6_SADDR_RULE_HOA, | |
950 | #endif | |
951 | IPV6_SADDR_RULE_OIF, | |
952 | IPV6_SADDR_RULE_LABEL, | |
953 | #ifdef CONFIG_IPV6_PRIVACY | |
954 | IPV6_SADDR_RULE_PRIVACY, | |
955 | #endif | |
956 | IPV6_SADDR_RULE_ORCHID, | |
957 | IPV6_SADDR_RULE_PREFIX, | |
958 | IPV6_SADDR_RULE_MAX | |
959 | }; | |
960 | ||
072047e4 | 961 | struct ipv6_saddr_score { |
a9b05723 YH |
962 | int rule; |
963 | int addr_type; | |
964 | struct inet6_ifaddr *ifa; | |
965 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
966 | int scopedist; | |
967 | int matchlen; | |
072047e4 YH |
968 | }; |
969 | ||
a9b05723 | 970 | struct ipv6_saddr_dst { |
9acd9f3a | 971 | const struct in6_addr *addr; |
a9b05723 YH |
972 | int ifindex; |
973 | int scope; | |
974 | int label; | |
7cbca67c | 975 | unsigned int prefs; |
a9b05723 | 976 | }; |
072047e4 | 977 | |
b6f99a21 | 978 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 979 | { |
45bb0060 | 980 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
981 | return 1; |
982 | return 0; | |
1da177e4 LT |
983 | } |
984 | ||
3de23255 BT |
985 | static int ipv6_get_saddr_eval(struct net *net, |
986 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
987 | struct ipv6_saddr_dst *dst, |
988 | int i) | |
989 | { | |
990 | int ret; | |
991 | ||
992 | if (i <= score->rule) { | |
993 | switch (i) { | |
994 | case IPV6_SADDR_RULE_SCOPE: | |
995 | ret = score->scopedist; | |
996 | break; | |
997 | case IPV6_SADDR_RULE_PREFIX: | |
998 | ret = score->matchlen; | |
999 | break; | |
1000 | default: | |
1001 | ret = !!test_bit(i, score->scorebits); | |
1002 | } | |
1003 | goto out; | |
1004 | } | |
1005 | ||
1006 | switch (i) { | |
1007 | case IPV6_SADDR_RULE_INIT: | |
1008 | /* Rule 0: remember if hiscore is not ready yet */ | |
1009 | ret = !!score->ifa; | |
1010 | break; | |
1011 | case IPV6_SADDR_RULE_LOCAL: | |
1012 | /* Rule 1: Prefer same address */ | |
1013 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1014 | break; | |
1015 | case IPV6_SADDR_RULE_SCOPE: | |
1016 | /* Rule 2: Prefer appropriate scope | |
1017 | * | |
1018 | * ret | |
1019 | * ^ | |
1020 | * -1 | d 15 | |
1021 | * ---+--+-+---> scope | |
1022 | * | | |
1023 | * | d is scope of the destination. | |
1024 | * B-d | \ | |
1025 | * | \ <- smaller scope is better if | |
1026 | * B-15 | \ if scope is enough for destinaion. | |
1027 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1028 | * d-C-1 | / | |
1029 | * |/ <- greater is better | |
1030 | * -C / if scope is not enough for destination. | |
1031 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1032 | * | |
1033 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1034 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1035 | * Assume B = 0 and we get C > 29. | |
1036 | */ | |
1037 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1038 | if (ret >= dst->scope) | |
1039 | ret = -ret; | |
1040 | else | |
1041 | ret -= 128; /* 30 is enough */ | |
1042 | score->scopedist = ret; | |
1043 | break; | |
1044 | case IPV6_SADDR_RULE_PREFERRED: | |
1045 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1046 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1047 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1048 | break; | |
1049 | #ifdef CONFIG_IPV6_MIP6 | |
1050 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1051 | { |
a9b05723 | 1052 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1053 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1054 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1055 | break; |
7cbca67c | 1056 | } |
a9b05723 YH |
1057 | #endif |
1058 | case IPV6_SADDR_RULE_OIF: | |
1059 | /* Rule 5: Prefer outgoing interface */ | |
1060 | ret = (!dst->ifindex || | |
1061 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1062 | break; | |
1063 | case IPV6_SADDR_RULE_LABEL: | |
1064 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1065 | ret = ipv6_addr_label(net, |
1066 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1067 | score->ifa->idev->dev->ifindex) == dst->label; |
1068 | break; | |
1069 | #ifdef CONFIG_IPV6_PRIVACY | |
1070 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1071 | { |
a9b05723 YH |
1072 | /* Rule 7: Prefer public address |
1073 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1074 | */ | |
7cbca67c YH |
1075 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1076 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1077 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1078 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1079 | break; |
7cbca67c | 1080 | } |
a9b05723 YH |
1081 | #endif |
1082 | case IPV6_SADDR_RULE_ORCHID: | |
1083 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1084 | * non-ORCHID vs non-ORCHID | |
1085 | */ | |
1086 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1087 | ipv6_addr_orchid(dst->addr)); | |
1088 | break; | |
1089 | case IPV6_SADDR_RULE_PREFIX: | |
1090 | /* Rule 8: Use longest matching prefix */ | |
1091 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1092 | dst->addr); | |
1093 | break; | |
1094 | default: | |
1095 | ret = 0; | |
1096 | } | |
1097 | ||
1098 | if (ret) | |
1099 | __set_bit(i, score->scorebits); | |
1100 | score->rule = i; | |
1101 | out: | |
1102 | return ret; | |
1103 | } | |
1104 | ||
191cd582 | 1105 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1106 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1107 | struct in6_addr *saddr) |
1da177e4 | 1108 | { |
a9b05723 YH |
1109 | struct ipv6_saddr_score scores[2], |
1110 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1111 | struct ipv6_saddr_dst dst; |
072047e4 | 1112 | struct net_device *dev; |
a9b05723 | 1113 | int dst_type; |
1da177e4 | 1114 | |
a9b05723 YH |
1115 | dst_type = __ipv6_addr_type(daddr); |
1116 | dst.addr = daddr; | |
1117 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1118 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1119 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1120 | dst.prefs = prefs; |
a9b05723 YH |
1121 | |
1122 | hiscore->rule = -1; | |
1123 | hiscore->ifa = NULL; | |
1da177e4 | 1124 | |
8814c4b5 | 1125 | rcu_read_lock(); |
1da177e4 | 1126 | |
c6d14c84 | 1127 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1128 | struct inet6_dev *idev; |
072047e4 | 1129 | |
a9b05723 | 1130 | /* Candidate Source Address (section 4) |
072047e4 YH |
1131 | * - multicast and link-local destination address, |
1132 | * the set of candidate source address MUST only | |
1133 | * include addresses assigned to interfaces | |
1134 | * belonging to the same link as the outgoing | |
1135 | * interface. | |
1136 | * (- For site-local destination addresses, the | |
1137 | * set of candidate source addresses MUST only | |
1138 | * include addresses assigned to interfaces | |
1139 | * belonging to the same site as the outgoing | |
1140 | * interface.) | |
1141 | */ | |
a9b05723 YH |
1142 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1143 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1144 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1145 | continue; |
1da177e4 | 1146 | |
1da177e4 | 1147 | idev = __in6_dev_get(dev); |
072047e4 YH |
1148 | if (!idev) |
1149 | continue; | |
1150 | ||
1151 | read_lock_bh(&idev->lock); | |
502a2ffd | 1152 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1153 | int i; |
072047e4 | 1154 | |
a9b05723 | 1155 | /* |
6b3ae80a YH |
1156 | * - Tentative Address (RFC2462 section 5.4) |
1157 | * - A tentative address is not considered | |
1158 | * "assigned to an interface" in the traditional | |
95c385b4 | 1159 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1160 | * - Candidate Source Address (section 4) |
072047e4 YH |
1161 | * - In any case, anycast addresses, multicast |
1162 | * addresses, and the unspecified address MUST | |
1163 | * NOT be included in a candidate set. | |
1164 | */ | |
a9b05723 YH |
1165 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1166 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1167 | continue; |
a9b05723 YH |
1168 | |
1169 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1170 | ||
1171 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1172 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1173 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1174 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1175 | "assigned as unicast address on %s", |
1176 | dev->name); | |
1177 | continue; | |
1178 | } | |
1179 | ||
a9b05723 YH |
1180 | score->rule = -1; |
1181 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1182 | ||
1183 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1184 | int minihiscore, miniscore; | |
1185 | ||
3de23255 BT |
1186 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1187 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1188 | |
1189 | if (minihiscore > miniscore) { | |
1190 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1191 | score->scopedist > 0) { | |
1192 | /* | |
1193 | * special case: | |
1194 | * each remaining entry | |
1195 | * has too small (not enough) | |
1196 | * scope, because ifa entries | |
1197 | * are sorted by their scope | |
1198 | * values. | |
1199 | */ | |
1200 | goto try_nextdev; | |
1201 | } | |
1202 | break; | |
1203 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1204 | if (hiscore->ifa) |
1205 | in6_ifa_put(hiscore->ifa); | |
1206 | ||
1207 | in6_ifa_hold(score->ifa); | |
1208 | ||
a0bffffc | 1209 | swap(hiscore, score); |
a9b05723 YH |
1210 | |
1211 | /* restore our iterator */ | |
1212 | score->ifa = hiscore->ifa; | |
1213 | ||
1214 | break; | |
1da177e4 | 1215 | } |
072047e4 | 1216 | } |
1da177e4 | 1217 | } |
a9b05723 | 1218 | try_nextdev: |
072047e4 | 1219 | read_unlock_bh(&idev->lock); |
1da177e4 | 1220 | } |
8814c4b5 | 1221 | rcu_read_unlock(); |
1da177e4 | 1222 | |
a9b05723 | 1223 | if (!hiscore->ifa) |
072047e4 | 1224 | return -EADDRNOTAVAIL; |
1ab1457c | 1225 | |
a9b05723 YH |
1226 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1227 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1228 | return 0; |
1da177e4 | 1229 | } |
5e5f3f0f | 1230 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1231 | |
95c385b4 NH |
1232 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1233 | unsigned char banned_flags) | |
1da177e4 LT |
1234 | { |
1235 | struct inet6_dev *idev; | |
1236 | int err = -EADDRNOTAVAIL; | |
1237 | ||
8814c4b5 | 1238 | rcu_read_lock(); |
e21e8467 SH |
1239 | idev = __in6_dev_get(dev); |
1240 | if (idev) { | |
1da177e4 LT |
1241 | struct inet6_ifaddr *ifp; |
1242 | ||
1243 | read_lock_bh(&idev->lock); | |
502a2ffd | 1244 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1245 | if (ifp->scope == IFA_LINK && | |
1246 | !(ifp->flags & banned_flags)) { | |
1da177e4 LT |
1247 | ipv6_addr_copy(addr, &ifp->addr); |
1248 | err = 0; | |
1249 | break; | |
1250 | } | |
1251 | } | |
1252 | read_unlock_bh(&idev->lock); | |
1253 | } | |
8814c4b5 | 1254 | rcu_read_unlock(); |
1da177e4 LT |
1255 | return err; |
1256 | } | |
1257 | ||
1258 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1259 | { | |
1260 | int cnt = 0; | |
1261 | struct inet6_ifaddr *ifp; | |
1262 | ||
1263 | read_lock_bh(&idev->lock); | |
502a2ffd | 1264 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1265 | cnt++; |
1266 | read_unlock_bh(&idev->lock); | |
1267 | return cnt; | |
1268 | } | |
1269 | ||
bfeade08 DL |
1270 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1271 | struct net_device *dev, int strict) | |
1da177e4 | 1272 | { |
c2e21293 | 1273 | struct inet6_ifaddr *ifp = NULL; |
1274 | struct hlist_node *node; | |
3a88a81d | 1275 | unsigned int hash = ipv6_addr_hash(addr); |
1da177e4 | 1276 | |
5c578aed | 1277 | rcu_read_lock_bh(); |
1278 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1279 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1280 | continue; |
1da177e4 LT |
1281 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1282 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1283 | if (dev == NULL || ifp->idev->dev == dev || | |
1284 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1285 | break; | |
1286 | } | |
1287 | } | |
5c578aed | 1288 | rcu_read_unlock_bh(); |
1289 | ||
1da177e4 LT |
1290 | return ifp != NULL; |
1291 | } | |
7159039a YH |
1292 | EXPORT_SYMBOL(ipv6_chk_addr); |
1293 | ||
1da177e4 | 1294 | static |
06bfe655 DL |
1295 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1296 | struct net_device *dev) | |
1da177e4 | 1297 | { |
c2e21293 | 1298 | struct inet6_ifaddr *ifp; |
1299 | struct hlist_node *node; | |
3a88a81d | 1300 | unsigned int hash = ipv6_addr_hash(addr); |
1da177e4 | 1301 | |
c2e21293 | 1302 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1303 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1304 | continue; |
1da177e4 LT |
1305 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1306 | if (dev == NULL || ifp->idev->dev == dev) | |
1307 | break; | |
1308 | } | |
1309 | } | |
1310 | return ifp != NULL; | |
1311 | } | |
1312 | ||
52eeeb84 YH |
1313 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1314 | { | |
1315 | struct inet6_dev *idev; | |
1316 | struct inet6_ifaddr *ifa; | |
1317 | int onlink; | |
1318 | ||
1319 | onlink = 0; | |
1320 | rcu_read_lock(); | |
1321 | idev = __in6_dev_get(dev); | |
1322 | if (idev) { | |
1323 | read_lock_bh(&idev->lock); | |
502a2ffd | 1324 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1325 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1326 | ifa->prefix_len); | |
1327 | if (onlink) | |
1328 | break; | |
1329 | } | |
1330 | read_unlock_bh(&idev->lock); | |
1331 | } | |
1332 | rcu_read_unlock(); | |
1333 | return onlink; | |
1334 | } | |
1335 | ||
1336 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1337 | ||
9acd9f3a | 1338 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1339 | struct net_device *dev, int strict) |
1da177e4 | 1340 | { |
c2e21293 | 1341 | struct inet6_ifaddr *ifp = NULL; |
1342 | struct hlist_node *node; | |
3a88a81d | 1343 | unsigned int hash = ipv6_addr_hash(addr); |
1da177e4 | 1344 | |
5c578aed | 1345 | rcu_read_lock_bh(); |
1346 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1347 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1348 | continue; |
1da177e4 LT |
1349 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1350 | if (dev == NULL || ifp->idev->dev == dev || | |
1351 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1352 | in6_ifa_hold(ifp); | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | } | |
5c578aed | 1357 | rcu_read_unlock_bh(); |
1da177e4 LT |
1358 | |
1359 | return ifp; | |
1360 | } | |
1361 | ||
1da177e4 LT |
1362 | /* Gets referenced address, destroys ifaddr */ |
1363 | ||
cc411d0b | 1364 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1365 | { |
1da177e4 LT |
1366 | if (ifp->flags&IFA_F_PERMANENT) { |
1367 | spin_lock_bh(&ifp->lock); | |
1368 | addrconf_del_timer(ifp); | |
1369 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1370 | if (dad_failed) |
1371 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1372 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1373 | if (dad_failed) |
1374 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1375 | in6_ifa_put(ifp); |
1376 | #ifdef CONFIG_IPV6_PRIVACY | |
1377 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1378 | struct inet6_ifaddr *ifpub; | |
1379 | spin_lock_bh(&ifp->lock); | |
1380 | ifpub = ifp->ifpub; | |
1381 | if (ifpub) { | |
1382 | in6_ifa_hold(ifpub); | |
1383 | spin_unlock_bh(&ifp->lock); | |
1384 | ipv6_create_tempaddr(ifpub, ifp); | |
1385 | in6_ifa_put(ifpub); | |
1386 | } else { | |
1387 | spin_unlock_bh(&ifp->lock); | |
1388 | } | |
1389 | ipv6_del_addr(ifp); | |
1390 | #endif | |
1391 | } else | |
1392 | ipv6_del_addr(ifp); | |
1393 | } | |
1394 | ||
3c21edbd YH |
1395 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1396 | { | |
1b34be74 | 1397 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 BH |
1398 | |
1399 | if (net_ratelimit()) | |
0522fea6 JR |
1400 | printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |
1401 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1402 | |
1b34be74 YH |
1403 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1404 | struct in6_addr addr; | |
1405 | ||
1406 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1407 | addr.s6_addr32[1] = 0; | |
1408 | ||
1409 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1410 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1411 | /* DAD failed for link-local based on MAC address */ | |
1412 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 BH |
1413 | |
1414 | printk(KERN_INFO "%s: IPv6 being disabled!\n", | |
1415 | ifp->idev->dev->name); | |
1b34be74 YH |
1416 | } |
1417 | } | |
1418 | ||
cc411d0b | 1419 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1420 | } |
1da177e4 LT |
1421 | |
1422 | /* Join to solicited addr multicast group. */ | |
1423 | ||
1424 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1425 | { | |
1426 | struct in6_addr maddr; | |
1427 | ||
1428 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1429 | return; | |
1430 | ||
1431 | addrconf_addr_solict_mult(addr, &maddr); | |
1432 | ipv6_dev_mc_inc(dev, &maddr); | |
1433 | } | |
1434 | ||
1435 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1436 | { | |
1437 | struct in6_addr maddr; | |
1438 | ||
1439 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1440 | return; | |
1441 | ||
1442 | addrconf_addr_solict_mult(addr, &maddr); | |
1443 | __ipv6_dev_mc_dec(idev, &maddr); | |
1444 | } | |
1445 | ||
20380731 | 1446 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1447 | { |
1448 | struct in6_addr addr; | |
1449 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1450 | if (ipv6_addr_any(&addr)) | |
1451 | return; | |
1452 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1453 | } | |
1454 | ||
20380731 | 1455 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1456 | { |
1457 | struct in6_addr addr; | |
1458 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1459 | if (ipv6_addr_any(&addr)) | |
1460 | return; | |
1461 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1462 | } | |
1463 | ||
073a8e0e YH |
1464 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1465 | { | |
1466 | if (dev->addr_len != ETH_ALEN) | |
1467 | return -1; | |
1468 | memcpy(eui, dev->dev_addr, 3); | |
1469 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1470 | ||
1471 | /* | |
1472 | * The zSeries OSA network cards can be shared among various | |
1473 | * OS instances, but the OSA cards have only one MAC address. | |
1474 | * This leads to duplicate address conflicts in conjunction | |
1475 | * with IPv6 if more than one instance uses the same card. | |
1476 | * | |
1477 | * The driver for these cards can deliver a unique 16-bit | |
1478 | * identifier for each instance sharing the same card. It is | |
1479 | * placed instead of 0xFFFE in the interface identifier. The | |
1480 | * "u" bit of the interface identifier is not inverted in this | |
1481 | * case. Hence the resulting interface identifier has local | |
1482 | * scope according to RFC2373. | |
1483 | */ | |
1484 | if (dev->dev_id) { | |
1485 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1486 | eui[4] = dev->dev_id & 0xFF; | |
1487 | } else { | |
1488 | eui[3] = 0xFF; | |
1489 | eui[4] = 0xFE; | |
1490 | eui[0] ^= 2; | |
1491 | } | |
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1496 | { | |
1497 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1498 | if (dev->addr_len != ARCNET_ALEN) | |
1499 | return -1; | |
1500 | memset(eui, 0, 7); | |
1501 | eui[7] = *(u8*)dev->dev_addr; | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1506 | { | |
1507 | if (dev->addr_len != INFINIBAND_ALEN) | |
1508 | return -1; | |
1509 | memcpy(eui, dev->dev_addr + 12, 8); | |
1510 | eui[0] |= 2; | |
1511 | return 0; | |
1512 | } | |
1513 | ||
dfd982ba YH |
1514 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1515 | { | |
9af28511 SH |
1516 | if (addr == 0) |
1517 | return -1; | |
dfd982ba YH |
1518 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1519 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1520 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1521 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1522 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1523 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1524 | eui[1] = 0; | |
1525 | eui[2] = 0x5E; | |
1526 | eui[3] = 0xFE; | |
1527 | memcpy(eui + 4, &addr, 4); | |
1528 | return 0; | |
1529 | } | |
1530 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1531 | ||
1532 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1533 | { | |
1534 | if (dev->priv_flags & IFF_ISATAP) | |
1535 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1536 | return -1; | |
1537 | } | |
1538 | ||
1da177e4 LT |
1539 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1540 | { | |
1541 | switch (dev->type) { | |
1542 | case ARPHRD_ETHER: | |
1543 | case ARPHRD_FDDI: | |
1544 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1545 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1546 | case ARPHRD_ARCNET: |
073a8e0e | 1547 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1548 | case ARPHRD_INFINIBAND: |
073a8e0e | 1549 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1550 | case ARPHRD_SIT: |
dfd982ba | 1551 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1552 | } |
1553 | return -1; | |
1554 | } | |
1555 | ||
1556 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1557 | { | |
1558 | int err = -1; | |
1559 | struct inet6_ifaddr *ifp; | |
1560 | ||
1561 | read_lock_bh(&idev->lock); | |
502a2ffd | 1562 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1563 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1564 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1565 | err = 0; | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | read_unlock_bh(&idev->lock); | |
1570 | return err; | |
1571 | } | |
1572 | ||
1573 | #ifdef CONFIG_IPV6_PRIVACY | |
1574 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1575 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1576 | { | |
1da177e4 | 1577 | regen: |
955189ef | 1578 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1579 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1580 | |
1581 | /* | |
1582 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1583 | * check if generated address is not inappropriate | |
1584 | * | |
1585 | * - Reserved subnet anycast (RFC 2526) | |
1586 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1587 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1588 | * 00-00-5E-FE-xx-xx-xx-xx |
1589 | * - value 0 | |
1590 | * - XXX: already assigned to an address on the device | |
1591 | */ | |
1ab1457c | 1592 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1593 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1594 | (idev->rndid[7]&0x80)) | |
1595 | goto regen; | |
1596 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1597 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1598 | goto regen; | |
1599 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1600 | goto regen; | |
1601 | } | |
1602 | ||
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | static void ipv6_regen_rndid(unsigned long data) | |
1607 | { | |
1608 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1609 | unsigned long expires; | |
1610 | ||
8814c4b5 | 1611 | rcu_read_lock_bh(); |
1da177e4 LT |
1612 | write_lock_bh(&idev->lock); |
1613 | ||
1614 | if (idev->dead) | |
1615 | goto out; | |
1616 | ||
1617 | if (__ipv6_regen_rndid(idev) < 0) | |
1618 | goto out; | |
1ab1457c | 1619 | |
1da177e4 | 1620 | expires = jiffies + |
1ab1457c | 1621 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1622 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1623 | if (time_before(expires, jiffies)) { | |
1624 | printk(KERN_WARNING | |
1625 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1626 | idev->dev->name); | |
1627 | goto out; | |
1628 | } | |
1629 | ||
1630 | if (!mod_timer(&idev->regen_timer, expires)) | |
1631 | in6_dev_hold(idev); | |
1632 | ||
1633 | out: | |
1634 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1635 | rcu_read_unlock_bh(); |
1da177e4 LT |
1636 | in6_dev_put(idev); |
1637 | } | |
1638 | ||
1639 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1640 | int ret = 0; | |
1641 | ||
1642 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1643 | ret = __ipv6_regen_rndid(idev); | |
1644 | return ret; | |
1645 | } | |
1646 | #endif | |
1647 | ||
1648 | /* | |
1649 | * Add prefix route. | |
1650 | */ | |
1651 | ||
1652 | static void | |
1653 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1654 | unsigned long expires, u32 flags) |
1da177e4 | 1655 | { |
86872cb5 TG |
1656 | struct fib6_config cfg = { |
1657 | .fc_table = RT6_TABLE_PREFIX, | |
1658 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1659 | .fc_ifindex = dev->ifindex, | |
1660 | .fc_expires = expires, | |
1661 | .fc_dst_len = plen, | |
1662 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1663 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1664 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1665 | }; |
1da177e4 | 1666 | |
86872cb5 | 1667 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1668 | |
1669 | /* Prevent useless cloning on PtP SIT. | |
1670 | This thing is done here expecting that the whole | |
1671 | class of non-broadcast devices need not cloning. | |
1672 | */ | |
0be669bb | 1673 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1674 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1675 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1676 | #endif |
1da177e4 | 1677 | |
86872cb5 | 1678 | ip6_route_add(&cfg); |
1da177e4 LT |
1679 | } |
1680 | ||
1681 | /* Create "default" multicast route to the interface */ | |
1682 | ||
1683 | static void addrconf_add_mroute(struct net_device *dev) | |
1684 | { | |
86872cb5 TG |
1685 | struct fib6_config cfg = { |
1686 | .fc_table = RT6_TABLE_LOCAL, | |
1687 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1688 | .fc_ifindex = dev->ifindex, | |
1689 | .fc_dst_len = 8, | |
1690 | .fc_flags = RTF_UP, | |
c346dca1 | 1691 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1692 | }; |
1693 | ||
1694 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1695 | ||
1696 | ip6_route_add(&cfg); | |
1da177e4 LT |
1697 | } |
1698 | ||
0be669bb | 1699 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1700 | static void sit_route_add(struct net_device *dev) |
1701 | { | |
86872cb5 TG |
1702 | struct fib6_config cfg = { |
1703 | .fc_table = RT6_TABLE_MAIN, | |
1704 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1705 | .fc_ifindex = dev->ifindex, | |
1706 | .fc_dst_len = 96, | |
1707 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1708 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1709 | }; |
1da177e4 LT |
1710 | |
1711 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1712 | ip6_route_add(&cfg); |
1da177e4 | 1713 | } |
0be669bb | 1714 | #endif |
1da177e4 LT |
1715 | |
1716 | static void addrconf_add_lroute(struct net_device *dev) | |
1717 | { | |
1718 | struct in6_addr addr; | |
1719 | ||
1720 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1721 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1722 | } | |
1723 | ||
1724 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1725 | { | |
1726 | struct inet6_dev *idev; | |
1727 | ||
1728 | ASSERT_RTNL(); | |
1729 | ||
e21e8467 SH |
1730 | idev = ipv6_find_idev(dev); |
1731 | if (!idev) | |
1da177e4 LT |
1732 | return NULL; |
1733 | ||
1734 | /* Add default multicast route */ | |
1735 | addrconf_add_mroute(dev); | |
1736 | ||
1737 | /* Add link local route */ | |
1738 | addrconf_add_lroute(dev); | |
1739 | return idev; | |
1740 | } | |
1741 | ||
1742 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1743 | { | |
1744 | struct prefix_info *pinfo; | |
1745 | __u32 valid_lft; | |
1746 | __u32 prefered_lft; | |
1747 | int addr_type; | |
1da177e4 | 1748 | struct inet6_dev *in6_dev; |
56d417b1 | 1749 | struct net *net = dev_net(dev); |
1da177e4 LT |
1750 | |
1751 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1752 | |
1da177e4 LT |
1753 | if (len < sizeof(struct prefix_info)) { |
1754 | ADBG(("addrconf: prefix option too short\n")); | |
1755 | return; | |
1756 | } | |
1ab1457c | 1757 | |
1da177e4 LT |
1758 | /* |
1759 | * Validation checks ([ADDRCONF], page 19) | |
1760 | */ | |
1761 | ||
1762 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1763 | ||
1764 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1765 | return; | |
1766 | ||
1767 | valid_lft = ntohl(pinfo->valid); | |
1768 | prefered_lft = ntohl(pinfo->prefered); | |
1769 | ||
1770 | if (prefered_lft > valid_lft) { | |
1771 | if (net_ratelimit()) | |
1772 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1773 | return; | |
1774 | } | |
1775 | ||
1776 | in6_dev = in6_dev_get(dev); | |
1777 | ||
1778 | if (in6_dev == NULL) { | |
1779 | if (net_ratelimit()) | |
1780 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1781 | return; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Two things going on here: | |
1786 | * 1) Add routes for on-link prefixes | |
1787 | * 2) Configure prefixes with the auto flag set | |
1788 | */ | |
1789 | ||
4bed72e4 YH |
1790 | if (pinfo->onlink) { |
1791 | struct rt6_info *rt; | |
1792 | unsigned long rt_expires; | |
1793 | ||
6f704992 YH |
1794 | /* Avoid arithmetic overflow. Really, we could |
1795 | * save rt_expires in seconds, likely valid_lft, | |
1796 | * but it would require division in fib gc, that it | |
1797 | * not good. | |
1798 | */ | |
4bed72e4 YH |
1799 | if (HZ > USER_HZ) |
1800 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1801 | else | |
1802 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1803 | |
4bed72e4 YH |
1804 | if (addrconf_finite_timeout(rt_expires)) |
1805 | rt_expires *= HZ; | |
1da177e4 | 1806 | |
56d417b1 | 1807 | rt = rt6_lookup(net, &pinfo->prefix, NULL, |
6fda7350 | 1808 | dev->ifindex, 1); |
1da177e4 | 1809 | |
2b5ead46 | 1810 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1811 | /* Autoconf prefix route */ |
1812 | if (valid_lft == 0) { | |
1813 | ip6_del_rt(rt); | |
1814 | rt = NULL; | |
4bed72e4 | 1815 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1816 | /* not infinity */ |
1817 | rt->rt6i_expires = jiffies + rt_expires; | |
1818 | rt->rt6i_flags |= RTF_EXPIRES; | |
1819 | } else { | |
1820 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1821 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1822 | } |
1823 | } else if (valid_lft) { | |
6f704992 | 1824 | clock_t expires = 0; |
4bed72e4 YH |
1825 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1826 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1827 | /* not infinity */ |
1828 | flags |= RTF_EXPIRES; | |
1829 | expires = jiffies_to_clock_t(rt_expires); | |
1830 | } | |
1da177e4 | 1831 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1832 | dev, expires, flags); |
1da177e4 LT |
1833 | } |
1834 | if (rt) | |
1835 | dst_release(&rt->u.dst); | |
1836 | } | |
1837 | ||
1838 | /* Try to figure out our local address for this prefix */ | |
1839 | ||
1840 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1841 | struct inet6_ifaddr * ifp; | |
1842 | struct in6_addr addr; | |
1843 | int create = 0, update_lft = 0; | |
1844 | ||
1845 | if (pinfo->prefix_len == 64) { | |
1846 | memcpy(&addr, &pinfo->prefix, 8); | |
1847 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1848 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1849 | in6_dev_put(in6_dev); | |
1850 | return; | |
1851 | } | |
1852 | goto ok; | |
1853 | } | |
1854 | if (net_ratelimit()) | |
1855 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1856 | pinfo->prefix_len); | |
1857 | in6_dev_put(in6_dev); | |
1858 | return; | |
1859 | ||
1860 | ok: | |
1861 | ||
53b7997f | 1862 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1863 | |
1864 | if (ifp == NULL && valid_lft) { | |
1865 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1866 | u32 addr_flags = 0; |
1867 | ||
1868 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1869 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1870 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1871 | addr_flags = IFA_F_OPTIMISTIC; |
1872 | #endif | |
1da177e4 LT |
1873 | |
1874 | /* Do not allow to create too much of autoconfigured | |
1875 | * addresses; this would be too easy way to crash kernel. | |
1876 | */ | |
1877 | if (!max_addresses || | |
1878 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1879 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1880 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1881 | addr_flags); | |
1da177e4 LT |
1882 | |
1883 | if (!ifp || IS_ERR(ifp)) { | |
1884 | in6_dev_put(in6_dev); | |
1885 | return; | |
1886 | } | |
1887 | ||
1888 | update_lft = create = 1; | |
1889 | ifp->cstamp = jiffies; | |
1890 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1891 | } | |
1892 | ||
1893 | if (ifp) { | |
1894 | int flags; | |
1895 | unsigned long now; | |
1896 | #ifdef CONFIG_IPV6_PRIVACY | |
1897 | struct inet6_ifaddr *ift; | |
1898 | #endif | |
1899 | u32 stored_lft; | |
1900 | ||
1901 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1902 | spin_lock(&ifp->lock); | |
1903 | now = jiffies; | |
1904 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1905 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1906 | else | |
1907 | stored_lft = 0; | |
1908 | if (!update_lft && stored_lft) { | |
1909 | if (valid_lft > MIN_VALID_LIFETIME || | |
1910 | valid_lft > stored_lft) | |
1911 | update_lft = 1; | |
1912 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1913 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1914 | /* |
1915 | * RFC 4862 Section 5.5.3e: | |
1916 | * "Note that the preferred lifetime of | |
1917 | * the corresponding address is always | |
1918 | * reset to the Preferred Lifetime in | |
1919 | * the received Prefix Information | |
1920 | * option, regardless of whether the | |
1921 | * valid lifetime is also reset or | |
1922 | * ignored." | |
1923 | * | |
1924 | * So if the preferred lifetime in | |
1925 | * this advertisement is different | |
1926 | * than what we have stored, but the | |
1927 | * valid lifetime is invalid, just | |
1928 | * reset prefered_lft. | |
1929 | * | |
1930 | * We must set the valid lifetime | |
1931 | * to the stored lifetime since we'll | |
1932 | * be updating the timestamp below, | |
1933 | * else we'll set it back to the | |
1934 | * minumum. | |
1935 | */ | |
1936 | if (prefered_lft != ifp->prefered_lft) { | |
1937 | valid_lft = stored_lft; | |
1938 | update_lft = 1; | |
1939 | } | |
1da177e4 LT |
1940 | } else { |
1941 | valid_lft = MIN_VALID_LIFETIME; | |
1942 | if (valid_lft < prefered_lft) | |
1943 | prefered_lft = valid_lft; | |
1944 | update_lft = 1; | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | if (update_lft) { | |
1949 | ifp->valid_lft = valid_lft; | |
1950 | ifp->prefered_lft = prefered_lft; | |
1951 | ifp->tstamp = now; | |
1952 | flags = ifp->flags; | |
1953 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1954 | spin_unlock(&ifp->lock); | |
1955 | ||
1956 | if (!(flags&IFA_F_TENTATIVE)) | |
1957 | ipv6_ifa_notify(0, ifp); | |
1958 | } else | |
1959 | spin_unlock(&ifp->lock); | |
1960 | ||
1961 | #ifdef CONFIG_IPV6_PRIVACY | |
1962 | read_lock_bh(&in6_dev->lock); | |
1963 | /* update all temporary addresses in the list */ | |
372e6c8f | 1964 | list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) { |
1da177e4 LT |
1965 | /* |
1966 | * When adjusting the lifetimes of an existing | |
1967 | * temporary address, only lower the lifetimes. | |
1968 | * Implementations must not increase the | |
1969 | * lifetimes of an existing temporary address | |
1970 | * when processing a Prefix Information Option. | |
1971 | */ | |
c6fbfac2 BB |
1972 | if (ifp != ift->ifpub) |
1973 | continue; | |
1974 | ||
1da177e4 LT |
1975 | spin_lock(&ift->lock); |
1976 | flags = ift->flags; | |
1977 | if (ift->valid_lft > valid_lft && | |
1978 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1979 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1980 | if (ift->prefered_lft > prefered_lft && | |
1981 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1982 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1983 | spin_unlock(&ift->lock); | |
1984 | if (!(flags&IFA_F_TENTATIVE)) | |
1985 | ipv6_ifa_notify(0, ift); | |
1986 | } | |
1987 | ||
1988 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1989 | /* | |
1990 | * When a new public address is created as described in [ADDRCONF], | |
1991 | * also create a new temporary address. | |
1992 | */ | |
1ab1457c | 1993 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1994 | ipv6_create_tempaddr(ifp, NULL); |
1995 | } else { | |
1996 | read_unlock_bh(&in6_dev->lock); | |
1997 | } | |
1998 | #endif | |
1999 | in6_ifa_put(ifp); | |
2000 | addrconf_verify(0); | |
2001 | } | |
2002 | } | |
2003 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2004 | in6_dev_put(in6_dev); | |
2005 | } | |
2006 | ||
2007 | /* | |
2008 | * Set destination address. | |
2009 | * Special case for SIT interfaces where we create a new "virtual" | |
2010 | * device. | |
2011 | */ | |
af284937 | 2012 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2013 | { |
2014 | struct in6_ifreq ireq; | |
2015 | struct net_device *dev; | |
2016 | int err = -EINVAL; | |
2017 | ||
2018 | rtnl_lock(); | |
2019 | ||
2020 | err = -EFAULT; | |
2021 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2022 | goto err_exit; | |
2023 | ||
af284937 | 2024 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2025 | |
2026 | err = -ENODEV; | |
2027 | if (dev == NULL) | |
2028 | goto err_exit; | |
2029 | ||
0be669bb | 2030 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2031 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2032 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2033 | struct ifreq ifr; |
1da177e4 LT |
2034 | struct ip_tunnel_parm p; |
2035 | ||
2036 | err = -EADDRNOTAVAIL; | |
2037 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2038 | goto err_exit; | |
2039 | ||
2040 | memset(&p, 0, sizeof(p)); | |
2041 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2042 | p.iph.saddr = 0; | |
2043 | p.iph.version = 4; | |
2044 | p.iph.ihl = 5; | |
2045 | p.iph.protocol = IPPROTO_IPV6; | |
2046 | p.iph.ttl = 64; | |
d20b3109 | 2047 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2048 | |
5bc3eb7e SH |
2049 | if (ops->ndo_do_ioctl) { |
2050 | mm_segment_t oldfs = get_fs(); | |
2051 | ||
2052 | set_fs(KERNEL_DS); | |
2053 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2054 | set_fs(oldfs); | |
2055 | } else | |
2056 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2057 | |
2058 | if (err == 0) { | |
2059 | err = -ENOBUFS; | |
af284937 DL |
2060 | dev = __dev_get_by_name(net, p.name); |
2061 | if (!dev) | |
1da177e4 LT |
2062 | goto err_exit; |
2063 | err = dev_open(dev); | |
2064 | } | |
2065 | } | |
0be669bb | 2066 | #endif |
1da177e4 LT |
2067 | |
2068 | err_exit: | |
2069 | rtnl_unlock(); | |
2070 | return err; | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * Manual configuration of address on an interface | |
2075 | */ | |
af284937 | 2076 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2077 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2078 | __u32 valid_lft) |
1da177e4 LT |
2079 | { |
2080 | struct inet6_ifaddr *ifp; | |
2081 | struct inet6_dev *idev; | |
2082 | struct net_device *dev; | |
2083 | int scope; | |
6f704992 YH |
2084 | u32 flags; |
2085 | clock_t expires; | |
4bed72e4 | 2086 | unsigned long timeout; |
1da177e4 LT |
2087 | |
2088 | ASSERT_RTNL(); | |
1ab1457c | 2089 | |
24ef0da7 TG |
2090 | if (plen > 128) |
2091 | return -EINVAL; | |
2092 | ||
0778769d NT |
2093 | /* check the lifetime */ |
2094 | if (!valid_lft || prefered_lft > valid_lft) | |
2095 | return -EINVAL; | |
2096 | ||
af284937 DL |
2097 | dev = __dev_get_by_index(net, ifindex); |
2098 | if (!dev) | |
1da177e4 | 2099 | return -ENODEV; |
1ab1457c | 2100 | |
1da177e4 LT |
2101 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2102 | return -ENOBUFS; | |
2103 | ||
2104 | scope = ipv6_addr_scope(pfx); | |
2105 | ||
4bed72e4 YH |
2106 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2107 | if (addrconf_finite_timeout(timeout)) { | |
2108 | expires = jiffies_to_clock_t(timeout * HZ); | |
2109 | valid_lft = timeout; | |
6f704992 | 2110 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2111 | } else { |
2112 | expires = 0; | |
2113 | flags = 0; | |
2114 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2115 | } |
0778769d | 2116 | |
4bed72e4 YH |
2117 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2118 | if (addrconf_finite_timeout(timeout)) { | |
2119 | if (timeout == 0) | |
2120 | ifa_flags |= IFA_F_DEPRECATED; | |
2121 | prefered_lft = timeout; | |
2122 | } | |
0778769d NT |
2123 | |
2124 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2125 | ||
1da177e4 | 2126 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2127 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2128 | ifp->valid_lft = valid_lft; |
2129 | ifp->prefered_lft = prefered_lft; | |
2130 | ifp->tstamp = jiffies; | |
06aebfb7 | 2131 | spin_unlock_bh(&ifp->lock); |
0778769d | 2132 | |
46d48046 | 2133 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2134 | expires, flags); |
95c385b4 NH |
2135 | /* |
2136 | * Note that section 3.1 of RFC 4429 indicates | |
2137 | * that the Optimistic flag should not be set for | |
2138 | * manually configured addresses | |
2139 | */ | |
1da177e4 LT |
2140 | addrconf_dad_start(ifp, 0); |
2141 | in6_ifa_put(ifp); | |
0778769d | 2142 | addrconf_verify(0); |
1da177e4 LT |
2143 | return 0; |
2144 | } | |
2145 | ||
2146 | return PTR_ERR(ifp); | |
2147 | } | |
2148 | ||
af284937 | 2149 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2150 | unsigned int plen) |
1da177e4 LT |
2151 | { |
2152 | struct inet6_ifaddr *ifp; | |
2153 | struct inet6_dev *idev; | |
2154 | struct net_device *dev; | |
1ab1457c | 2155 | |
24ef0da7 TG |
2156 | if (plen > 128) |
2157 | return -EINVAL; | |
2158 | ||
af284937 DL |
2159 | dev = __dev_get_by_index(net, ifindex); |
2160 | if (!dev) | |
1da177e4 LT |
2161 | return -ENODEV; |
2162 | ||
2163 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2164 | return -ENXIO; | |
2165 | ||
2166 | read_lock_bh(&idev->lock); | |
502a2ffd | 2167 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2168 | if (ifp->prefix_len == plen && |
2169 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2170 | in6_ifa_hold(ifp); | |
2171 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2172 | |
1da177e4 LT |
2173 | ipv6_del_addr(ifp); |
2174 | ||
2175 | /* If the last address is deleted administratively, | |
2176 | disable IPv6 on this interface. | |
2177 | */ | |
502a2ffd | 2178 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2179 | addrconf_ifdown(idev->dev, 1); |
2180 | return 0; | |
2181 | } | |
2182 | } | |
2183 | read_unlock_bh(&idev->lock); | |
2184 | return -EADDRNOTAVAIL; | |
2185 | } | |
2186 | ||
2187 | ||
af284937 | 2188 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2189 | { |
2190 | struct in6_ifreq ireq; | |
2191 | int err; | |
1ab1457c | 2192 | |
1da177e4 LT |
2193 | if (!capable(CAP_NET_ADMIN)) |
2194 | return -EPERM; | |
1ab1457c | 2195 | |
1da177e4 LT |
2196 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2197 | return -EFAULT; | |
2198 | ||
2199 | rtnl_lock(); | |
af284937 DL |
2200 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2201 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2202 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2203 | rtnl_unlock(); |
2204 | return err; | |
2205 | } | |
2206 | ||
af284937 | 2207 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2208 | { |
2209 | struct in6_ifreq ireq; | |
2210 | int err; | |
1ab1457c | 2211 | |
1da177e4 LT |
2212 | if (!capable(CAP_NET_ADMIN)) |
2213 | return -EPERM; | |
2214 | ||
2215 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2216 | return -EFAULT; | |
2217 | ||
2218 | rtnl_lock(); | |
af284937 DL |
2219 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2220 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2221 | rtnl_unlock(); |
2222 | return err; | |
2223 | } | |
2224 | ||
b5f348e5 IJ |
2225 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2226 | int plen, int scope) | |
2227 | { | |
2228 | struct inet6_ifaddr *ifp; | |
2229 | ||
2230 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2231 | if (!IS_ERR(ifp)) { | |
2232 | spin_lock_bh(&ifp->lock); | |
2233 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2234 | spin_unlock_bh(&ifp->lock); | |
2235 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2236 | in6_ifa_put(ifp); | |
2237 | } | |
2238 | } | |
2239 | ||
0be669bb | 2240 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2241 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2242 | { | |
1da177e4 LT |
2243 | struct in6_addr addr; |
2244 | struct net_device *dev; | |
c346dca1 | 2245 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2246 | int scope; |
2247 | ||
2248 | ASSERT_RTNL(); | |
2249 | ||
2250 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2251 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2252 | ||
2253 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2254 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2255 | scope = IFA_LINK; | |
2256 | } else { | |
2257 | scope = IPV6_ADDR_COMPATv4; | |
2258 | } | |
2259 | ||
2260 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2261 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2262 | return; |
2263 | } | |
2264 | ||
6fda7350 | 2265 | for_each_netdev(net, dev) { |
e5ed6399 | 2266 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2267 | if (in_dev && (dev->flags & IFF_UP)) { |
2268 | struct in_ifaddr * ifa; | |
2269 | ||
2270 | int flag = scope; | |
2271 | ||
2272 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2273 | int plen; | |
2274 | ||
2275 | addr.s6_addr32[3] = ifa->ifa_local; | |
2276 | ||
2277 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2278 | continue; | |
2279 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2280 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2281 | continue; | |
2282 | flag |= IFA_HOST; | |
2283 | } | |
2284 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2285 | plen = 64; | |
2286 | else | |
2287 | plen = 96; | |
2288 | ||
b5f348e5 | 2289 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2290 | } |
2291 | } | |
1ab1457c | 2292 | } |
1da177e4 | 2293 | } |
0be669bb | 2294 | #endif |
1da177e4 LT |
2295 | |
2296 | static void init_loopback(struct net_device *dev) | |
2297 | { | |
2298 | struct inet6_dev *idev; | |
1da177e4 LT |
2299 | |
2300 | /* ::1 */ | |
2301 | ||
2302 | ASSERT_RTNL(); | |
2303 | ||
2304 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2305 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2306 | return; | |
2307 | } | |
2308 | ||
b5f348e5 | 2309 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2310 | } |
2311 | ||
2312 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2313 | { | |
2314 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2315 | u32 addr_flags = IFA_F_PERMANENT; |
2316 | ||
2317 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2318 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2319 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2320 | addr_flags |= IFA_F_OPTIMISTIC; |
2321 | #endif | |
1da177e4 | 2322 | |
95c385b4 NH |
2323 | |
2324 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2325 | if (!IS_ERR(ifp)) { |
46d48046 | 2326 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2327 | addrconf_dad_start(ifp, 0); |
2328 | in6_ifa_put(ifp); | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | static void addrconf_dev_config(struct net_device *dev) | |
2333 | { | |
2334 | struct in6_addr addr; | |
2335 | struct inet6_dev * idev; | |
2336 | ||
2337 | ASSERT_RTNL(); | |
2338 | ||
74235a25 HX |
2339 | if ((dev->type != ARPHRD_ETHER) && |
2340 | (dev->type != ARPHRD_FDDI) && | |
2341 | (dev->type != ARPHRD_IEEE802_TR) && | |
2342 | (dev->type != ARPHRD_ARCNET) && | |
2343 | (dev->type != ARPHRD_INFINIBAND)) { | |
2344 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2345 | return; | |
2346 | } | |
2347 | ||
1da177e4 LT |
2348 | idev = addrconf_add_dev(dev); |
2349 | if (idev == NULL) | |
2350 | return; | |
2351 | ||
2352 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2353 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2354 | ||
2355 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2356 | addrconf_add_linklocal(idev, &addr); | |
2357 | } | |
2358 | ||
0be669bb | 2359 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2360 | static void addrconf_sit_config(struct net_device *dev) |
2361 | { | |
2362 | struct inet6_dev *idev; | |
2363 | ||
2364 | ASSERT_RTNL(); | |
2365 | ||
1ab1457c YH |
2366 | /* |
2367 | * Configure the tunnel with one of our IPv4 | |
2368 | * addresses... we should configure all of | |
1da177e4 LT |
2369 | * our v4 addrs in the tunnel |
2370 | */ | |
2371 | ||
2372 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2373 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2374 | return; | |
2375 | } | |
2376 | ||
c7dc89c0 FT |
2377 | if (dev->priv_flags & IFF_ISATAP) { |
2378 | struct in6_addr addr; | |
2379 | ||
2380 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2381 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2382 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2383 | addrconf_add_linklocal(idev, &addr); | |
2384 | return; | |
2385 | } | |
2386 | ||
1da177e4 LT |
2387 | sit_add_v4_addrs(idev); |
2388 | ||
2389 | if (dev->flags&IFF_POINTOPOINT) { | |
2390 | addrconf_add_mroute(dev); | |
2391 | addrconf_add_lroute(dev); | |
2392 | } else | |
2393 | sit_route_add(dev); | |
2394 | } | |
0be669bb | 2395 | #endif |
1da177e4 LT |
2396 | |
2397 | static inline int | |
2398 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2399 | { | |
2400 | struct in6_addr lladdr; | |
2401 | ||
95c385b4 | 2402 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2403 | addrconf_add_linklocal(idev, &lladdr); |
2404 | return 0; | |
2405 | } | |
2406 | return -1; | |
2407 | } | |
2408 | ||
2409 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2410 | { | |
2411 | struct net_device *link_dev; | |
c346dca1 | 2412 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2413 | |
2414 | /* first try to inherit the link-local address from the link device */ | |
2415 | if (idev->dev->iflink && | |
6fda7350 | 2416 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2417 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2418 | return; | |
2419 | } | |
2420 | /* then try to inherit it from any device */ | |
6fda7350 | 2421 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2422 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2423 | return; | |
2424 | } | |
2425 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2426 | } | |
2427 | ||
2428 | /* | |
2429 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2430 | * DHCPv6, MLD etc. can be run over the virtual link | |
2431 | */ | |
2432 | ||
2433 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2434 | { | |
2435 | struct inet6_dev *idev; | |
2436 | ||
2437 | ASSERT_RTNL(); | |
2438 | ||
e21e8467 SH |
2439 | idev = addrconf_add_dev(dev); |
2440 | if (!idev) { | |
1da177e4 LT |
2441 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
2442 | return; | |
2443 | } | |
2444 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2445 | } |
2446 | ||
1ab1457c | 2447 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2448 | void * data) |
2449 | { | |
2450 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2451 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2452 | int run_pending = 0; |
b217d616 | 2453 | int err; |
1da177e4 | 2454 | |
e21e8467 | 2455 | switch (event) { |
45ba9dd2 | 2456 | case NETDEV_REGISTER: |
74235a25 | 2457 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2458 | idev = ipv6_add_dev(dev); |
2459 | if (!idev) | |
b217d616 | 2460 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2461 | } |
2462 | break; | |
bcdd553f | 2463 | |
1da177e4 | 2464 | case NETDEV_UP: |
3c21edbd | 2465 | case NETDEV_CHANGE: |
c2edacf8 JV |
2466 | if (dev->flags & IFF_SLAVE) |
2467 | break; | |
2468 | ||
3c21edbd | 2469 | if (event == NETDEV_UP) { |
f24e3d65 | 2470 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2471 | /* device is not ready yet. */ |
2472 | printk(KERN_INFO | |
2473 | "ADDRCONF(NETDEV_UP): %s: " | |
2474 | "link is not ready\n", | |
2475 | dev->name); | |
2476 | break; | |
2477 | } | |
99081049 | 2478 | |
d31c7b8f EP |
2479 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2480 | idev = ipv6_add_dev(dev); | |
2481 | ||
e3ec6cfc | 2482 | if (idev) { |
99081049 | 2483 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2484 | run_pending = 1; |
2485 | } | |
3c21edbd | 2486 | } else { |
f24e3d65 | 2487 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2488 | /* device is still not ready. */ |
2489 | break; | |
2490 | } | |
2491 | ||
2492 | if (idev) { | |
bcdd553f | 2493 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2494 | /* device is already configured. */ |
2495 | break; | |
3c21edbd YH |
2496 | idev->if_flags |= IF_READY; |
2497 | } | |
2498 | ||
2499 | printk(KERN_INFO | |
2500 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2501 | "link becomes ready\n", | |
2502 | dev->name); | |
2503 | ||
c5e33bdd | 2504 | run_pending = 1; |
3c21edbd YH |
2505 | } |
2506 | ||
e21e8467 | 2507 | switch (dev->type) { |
0be669bb | 2508 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2509 | case ARPHRD_SIT: |
2510 | addrconf_sit_config(dev); | |
2511 | break; | |
0be669bb | 2512 | #endif |
1da177e4 LT |
2513 | case ARPHRD_TUNNEL6: |
2514 | addrconf_ip6_tnl_config(dev); | |
2515 | break; | |
2516 | case ARPHRD_LOOPBACK: | |
2517 | init_loopback(dev); | |
2518 | break; | |
2519 | ||
2520 | default: | |
2521 | addrconf_dev_config(dev); | |
2522 | break; | |
3ff50b79 | 2523 | } |
bcdd553f | 2524 | |
1da177e4 | 2525 | if (idev) { |
c5e33bdd YH |
2526 | if (run_pending) |
2527 | addrconf_dad_run(idev); | |
2528 | ||
bcdd553f SH |
2529 | /* |
2530 | * If the MTU changed during the interface down, | |
2531 | * when the interface up, the changed MTU must be | |
2532 | * reflected in the idev as well as routers. | |
1da177e4 | 2533 | */ |
bcdd553f SH |
2534 | if (idev->cnf.mtu6 != dev->mtu && |
2535 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2536 | rt6_mtu_change(dev, dev->mtu); |
2537 | idev->cnf.mtu6 = dev->mtu; | |
2538 | } | |
2539 | idev->tstamp = jiffies; | |
2540 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2541 | |
2542 | /* | |
2543 | * If the changed mtu during down is lower than | |
2544 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2545 | */ |
2546 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2547 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2548 | } |
2549 | break; | |
2550 | ||
2551 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2552 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2553 | rt6_mtu_change(dev, dev->mtu); |
2554 | idev->cnf.mtu6 = dev->mtu; | |
2555 | break; | |
2556 | } | |
2557 | ||
d31c7b8f EP |
2558 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2559 | idev = ipv6_add_dev(dev); | |
2560 | if (idev) | |
2561 | break; | |
2562 | } | |
2563 | ||
bcdd553f SH |
2564 | /* |
2565 | * MTU falled under IPV6_MIN_MTU. | |
2566 | * Stop IPv6 on this interface. | |
2567 | */ | |
1da177e4 LT |
2568 | |
2569 | case NETDEV_DOWN: | |
2570 | case NETDEV_UNREGISTER: | |
2571 | /* | |
2572 | * Remove all addresses from this interface. | |
2573 | */ | |
2574 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2575 | break; | |
3c21edbd | 2576 | |
1da177e4 | 2577 | case NETDEV_CHANGENAME: |
1da177e4 | 2578 | if (idev) { |
5632c515 | 2579 | snmp6_unregister_dev(idev); |
408c4768 | 2580 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2581 | addrconf_sysctl_register(idev); |
b217d616 HX |
2582 | err = snmp6_register_dev(idev); |
2583 | if (err) | |
2584 | return notifier_from_errno(err); | |
5632c515 | 2585 | } |
1da177e4 | 2586 | break; |
bcdd553f | 2587 | |
93d9b7d7 JP |
2588 | case NETDEV_PRE_TYPE_CHANGE: |
2589 | case NETDEV_POST_TYPE_CHANGE: | |
2590 | addrconf_type_change(dev, event); | |
75c78500 | 2591 | break; |
3ff50b79 | 2592 | } |
1da177e4 LT |
2593 | |
2594 | return NOTIFY_OK; | |
2595 | } | |
2596 | ||
2597 | /* | |
2598 | * addrconf module should be notified of a device going up | |
2599 | */ | |
2600 | static struct notifier_block ipv6_dev_notf = { | |
2601 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2602 | }; |
2603 | ||
93d9b7d7 | 2604 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2605 | { |
2606 | struct inet6_dev *idev; | |
2607 | ASSERT_RTNL(); | |
2608 | ||
2609 | idev = __in6_dev_get(dev); | |
2610 | ||
93d9b7d7 | 2611 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2612 | ipv6_mc_remap(idev); |
93d9b7d7 | 2613 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2614 | ipv6_mc_unmap(idev); |
2615 | } | |
2616 | ||
1da177e4 LT |
2617 | static int addrconf_ifdown(struct net_device *dev, int how) |
2618 | { | |
c346dca1 | 2619 | struct net *net = dev_net(dev); |
502a2ffd | 2620 | struct inet6_dev *idev; |
2621 | struct inet6_ifaddr *ifa; | |
2622 | LIST_HEAD(keep_list); | |
1da177e4 LT |
2623 | |
2624 | ASSERT_RTNL(); | |
2625 | ||
f3db4851 | 2626 | rt6_ifdown(net, dev); |
1da177e4 LT |
2627 | neigh_ifdown(&nd_tbl, dev); |
2628 | ||
2629 | idev = __in6_dev_get(dev); | |
2630 | if (idev == NULL) | |
2631 | return -ENODEV; | |
2632 | ||
bcdd553f SH |
2633 | /* |
2634 | * Step 1: remove reference to ipv6 device from parent device. | |
2635 | * Do not dev_put! | |
1da177e4 | 2636 | */ |
439e2385 | 2637 | if (how) { |
1da177e4 | 2638 | idev->dead = 1; |
8814c4b5 YH |
2639 | |
2640 | /* protected by rtnl_lock */ | |
2641 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2642 | |
2643 | /* Step 1.5: remove snmp6 entry */ | |
2644 | snmp6_unregister_dev(idev); | |
2645 | ||
2646 | } | |
2647 | ||
1da177e4 LT |
2648 | write_lock_bh(&idev->lock); |
2649 | ||
bcdd553f | 2650 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2651 | if (!how) |
3c21edbd | 2652 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2653 | |
1da177e4 | 2654 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2655 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2656 | in6_dev_put(idev); |
2657 | ||
bcdd553f | 2658 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2659 | while (!list_empty(&idev->tempaddr_list)) { |
2660 | ifa = list_first_entry(&idev->tempaddr_list, | |
2661 | struct inet6_ifaddr, tmp_list); | |
2662 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2663 | ifa->dead = 1; |
2664 | write_unlock_bh(&idev->lock); | |
2665 | spin_lock_bh(&ifa->lock); | |
2666 | ||
2667 | if (ifa->ifpub) { | |
2668 | in6_ifa_put(ifa->ifpub); | |
2669 | ifa->ifpub = NULL; | |
2670 | } | |
2671 | spin_unlock_bh(&ifa->lock); | |
2672 | in6_ifa_put(ifa); | |
2673 | write_lock_bh(&idev->lock); | |
2674 | } | |
2675 | #endif | |
8f37ada5 | 2676 | |
502a2ffd | 2677 | while (!list_empty(&idev->addr_list)) { |
2678 | ifa = list_first_entry(&idev->addr_list, | |
2679 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2680 | addrconf_del_timer(ifa); |
2681 | ||
2682 | /* If just doing link down, and address is permanent | |
2683 | and not link-local, then retain it. */ | |
bcdd553f | 2684 | if (!how && |
84e8b803 | 2685 | (ifa->flags&IFA_F_PERMANENT) && |
2686 | !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { | |
502a2ffd | 2687 | list_move_tail(&ifa->if_list, &keep_list); |
dc2b99f7 | 2688 | |
84e8b803 | 2689 | /* If not doing DAD on this address, just keep it. */ |
2690 | if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) || | |
2691 | idev->cnf.accept_dad <= 0 || | |
2692 | (ifa->flags & IFA_F_NODAD)) | |
2693 | continue; | |
2694 | ||
2695 | /* If it was tentative already, no need to notify */ | |
2696 | if (ifa->flags & IFA_F_TENTATIVE) | |
2697 | continue; | |
2698 | ||
2699 | /* Flag it for later restoration when link comes up */ | |
2700 | ifa->flags |= IFA_F_TENTATIVE; | |
2701 | in6_ifa_hold(ifa); | |
dc2b99f7 | 2702 | } else { |
502a2ffd | 2703 | list_del(&ifa->if_list); |
dc2b99f7 | 2704 | ifa->dead = 1; |
84e8b803 | 2705 | } |
2706 | write_unlock_bh(&idev->lock); | |
1da177e4 | 2707 | |
c2e21293 | 2708 | /* clear hash table */ |
5c578aed | 2709 | spin_lock_bh(&addrconf_hash_lock); |
2710 | hlist_del_init_rcu(&ifa->addr_lst); | |
c2e21293 | 2711 | __in6_ifa_put(ifa); |
5c578aed | 2712 | spin_unlock_bh(&addrconf_hash_lock); |
c2e21293 | 2713 | |
84e8b803 | 2714 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
2715 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); | |
2716 | in6_ifa_put(ifa); | |
dc2b99f7 | 2717 | |
84e8b803 | 2718 | write_lock_bh(&idev->lock); |
1da177e4 | 2719 | } |
8f37ada5 | 2720 | |
502a2ffd | 2721 | list_splice(&keep_list, &idev->addr_list); |
8f37ada5 | 2722 | |
1da177e4 LT |
2723 | write_unlock_bh(&idev->lock); |
2724 | ||
2725 | /* Step 5: Discard multicast list */ | |
439e2385 | 2726 | if (how) |
1da177e4 LT |
2727 | ipv6_mc_destroy_dev(idev); |
2728 | else | |
2729 | ipv6_mc_down(idev); | |
2730 | ||
1da177e4 | 2731 | idev->tstamp = jiffies; |
1ab1457c | 2732 | |
bcdd553f | 2733 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2734 | if (how) { |
408c4768 | 2735 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2736 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2737 | neigh_ifdown(&nd_tbl, dev); | |
2738 | in6_dev_put(idev); | |
2739 | } | |
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | static void addrconf_rs_timer(unsigned long data) | |
2744 | { | |
2745 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2746 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2747 | |
5b2a1953 | 2748 | read_lock(&idev->lock); |
2749 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2750 | goto out; |
2751 | ||
5b2a1953 | 2752 | if (idev->cnf.forwarding) |
2753 | goto out; | |
2754 | ||
2755 | /* Announcement received after solicitation was sent */ | |
2756 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2757 | goto out; |
1da177e4 LT |
2758 | |
2759 | spin_lock(&ifp->lock); | |
5b2a1953 | 2760 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2761 | /* The wait after the last probe can be shorter */ |
2762 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2763 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2764 | idev->cnf.rtr_solicit_delay : | |
2765 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2766 | spin_unlock(&ifp->lock); |
2767 | ||
5b2a1953 | 2768 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2769 | } else { |
2770 | spin_unlock(&ifp->lock); | |
2771 | /* | |
2772 | * Note: we do not support deprecated "all on-link" | |
2773 | * assumption any longer. | |
2774 | */ | |
2775 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
5b2a1953 | 2776 | idev->dev->name); |
1da177e4 LT |
2777 | } |
2778 | ||
2779 | out: | |
5b2a1953 | 2780 | read_unlock(&idev->lock); |
1da177e4 LT |
2781 | in6_ifa_put(ifp); |
2782 | } | |
2783 | ||
2784 | /* | |
2785 | * Duplicate Address Detection | |
2786 | */ | |
3c21edbd YH |
2787 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2788 | { | |
2789 | unsigned long rand_num; | |
2790 | struct inet6_dev *idev = ifp->idev; | |
2791 | ||
95c385b4 NH |
2792 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2793 | rand_num = 0; | |
2794 | else | |
2795 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2796 | ||
3c21edbd YH |
2797 | ifp->probes = idev->cnf.dad_transmits; |
2798 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2799 | } | |
2800 | ||
e431b8c0 | 2801 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2802 | { |
2803 | struct inet6_dev *idev = ifp->idev; | |
2804 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2805 | |
2806 | addrconf_join_solict(dev, &ifp->addr); | |
2807 | ||
1da177e4 | 2808 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2809 | |
2810 | read_lock_bh(&idev->lock); | |
2811 | if (ifp->dead) | |
2812 | goto out; | |
1da177e4 | 2813 | |
21809faf | 2814 | spin_lock(&ifp->lock); |
1da177e4 | 2815 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
1b34be74 | 2816 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2817 | !(ifp->flags&IFA_F_TENTATIVE) || |
2818 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2819 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2820 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2821 | read_unlock_bh(&idev->lock); |
2822 | ||
2823 | addrconf_dad_completed(ifp); | |
2824 | return; | |
2825 | } | |
2826 | ||
6732bade | 2827 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2828 | spin_unlock(&ifp->lock); |
6732bade | 2829 | read_unlock_bh(&idev->lock); |
3c21edbd | 2830 | /* |
590a9887 | 2831 | * If the device is not ready: |
3c21edbd YH |
2832 | * - keep it tentative if it is a permanent address. |
2833 | * - otherwise, kill it. | |
2834 | */ | |
2835 | in6_ifa_hold(ifp); | |
cc411d0b | 2836 | addrconf_dad_stop(ifp, 0); |
6732bade | 2837 | return; |
3c21edbd | 2838 | } |
95c385b4 NH |
2839 | |
2840 | /* | |
2841 | * Optimistic nodes can start receiving | |
2842 | * Frames right away | |
2843 | */ | |
e21e8467 | 2844 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
2845 | ip6_ins_rt(ifp->rt); |
2846 | ||
6732bade | 2847 | addrconf_dad_kick(ifp); |
21809faf | 2848 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2849 | out: |
2850 | read_unlock_bh(&idev->lock); | |
2851 | } | |
2852 | ||
2853 | static void addrconf_dad_timer(unsigned long data) | |
2854 | { | |
2855 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2856 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2857 | struct in6_addr mcaddr; |
2858 | ||
122e4519 | 2859 | read_lock(&idev->lock); |
2860 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2861 | read_unlock(&idev->lock); | |
1da177e4 LT |
2862 | goto out; |
2863 | } | |
21809faf | 2864 | |
2865 | spin_lock(&ifp->lock); | |
1da177e4 LT |
2866 | if (ifp->probes == 0) { |
2867 | /* | |
2868 | * DAD was successful | |
2869 | */ | |
2870 | ||
cc411d0b | 2871 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2872 | spin_unlock(&ifp->lock); |
122e4519 | 2873 | read_unlock(&idev->lock); |
1da177e4 LT |
2874 | |
2875 | addrconf_dad_completed(ifp); | |
2876 | ||
2877 | goto out; | |
2878 | } | |
2879 | ||
2880 | ifp->probes--; | |
2881 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 2882 | spin_unlock(&ifp->lock); |
122e4519 | 2883 | read_unlock(&idev->lock); |
1da177e4 LT |
2884 | |
2885 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2886 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2887 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2888 | out: |
2889 | in6_ifa_put(ifp); | |
2890 | } | |
2891 | ||
2892 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2893 | { | |
e21e8467 | 2894 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
2895 | |
2896 | /* | |
2897 | * Configure the address for reception. Now it is valid. | |
2898 | */ | |
2899 | ||
2900 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2901 | ||
2902 | /* If added prefix is link local and forwarding is off, | |
2903 | start sending router solicitations. | |
2904 | */ | |
2905 | ||
2906 | if (ifp->idev->cnf.forwarding == 0 && | |
2907 | ifp->idev->cnf.rtr_solicits > 0 && | |
2908 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2909 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2910 | /* |
2911 | * If a host as already performed a random delay | |
2912 | * [...] as part of DAD [...] there is no need | |
2913 | * to delay again before sending the first RS | |
2914 | */ | |
f3ee4010 | 2915 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2916 | |
2917 | spin_lock_bh(&ifp->lock); | |
2918 | ifp->probes = 1; | |
2919 | ifp->idev->if_flags |= IF_RS_SENT; | |
2920 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2921 | spin_unlock_bh(&ifp->lock); | |
2922 | } | |
2923 | } | |
2924 | ||
e21e8467 SH |
2925 | static void addrconf_dad_run(struct inet6_dev *idev) |
2926 | { | |
c5e33bdd YH |
2927 | struct inet6_ifaddr *ifp; |
2928 | ||
2929 | read_lock_bh(&idev->lock); | |
502a2ffd | 2930 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 2931 | spin_lock(&ifp->lock); |
c5e33bdd | 2932 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
21809faf | 2933 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2934 | continue; |
2935 | } | |
21809faf | 2936 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2937 | addrconf_dad_kick(ifp); |
2938 | } | |
2939 | read_unlock_bh(&idev->lock); | |
2940 | } | |
2941 | ||
1da177e4 LT |
2942 | #ifdef CONFIG_PROC_FS |
2943 | struct if6_iter_state { | |
3c40090a | 2944 | struct seq_net_private p; |
1da177e4 LT |
2945 | int bucket; |
2946 | }; | |
2947 | ||
2948 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2949 | { | |
2950 | struct inet6_ifaddr *ifa = NULL; | |
2951 | struct if6_iter_state *state = seq->private; | |
1218854a | 2952 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2953 | |
2954 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 2955 | struct hlist_node *n; |
5c578aed | 2956 | hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket], |
2957 | addr_lst) | |
c2e21293 | 2958 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2959 | return ifa; | |
1da177e4 | 2960 | } |
c2e21293 | 2961 | return NULL; |
1da177e4 LT |
2962 | } |
2963 | ||
c2e21293 | 2964 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
2965 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
2966 | { |
2967 | struct if6_iter_state *state = seq->private; | |
1218854a | 2968 | struct net *net = seq_file_net(seq); |
c2e21293 | 2969 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 2970 | |
5c578aed | 2971 | hlist_for_each_entry_continue_rcu(ifa, n, addr_lst) |
c2e21293 | 2972 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2973 | return ifa; | |
3c40090a | 2974 | |
c2e21293 | 2975 | while (++state->bucket < IN6_ADDR_HSIZE) { |
2976 | hlist_for_each_entry(ifa, n, | |
2977 | &inet6_addr_lst[state->bucket], addr_lst) { | |
2978 | if (net_eq(dev_net(ifa->idev->dev), net)) | |
2979 | return ifa; | |
2980 | } | |
1da177e4 | 2981 | } |
3c40090a | 2982 | |
c2e21293 | 2983 | return NULL; |
1da177e4 LT |
2984 | } |
2985 | ||
2986 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2987 | { | |
2988 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2989 | ||
2990 | if (ifa) | |
e21e8467 | 2991 | while (pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
1da177e4 LT |
2992 | --pos; |
2993 | return pos ? NULL : ifa; | |
2994 | } | |
2995 | ||
2996 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
5c578aed | 2997 | __acquires(rcu) |
1da177e4 | 2998 | { |
5c578aed | 2999 | rcu_read_lock_bh(); |
1da177e4 LT |
3000 | return if6_get_idx(seq, *pos); |
3001 | } | |
3002 | ||
3003 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3004 | { | |
3005 | struct inet6_ifaddr *ifa; | |
3006 | ||
3007 | ifa = if6_get_next(seq, v); | |
3008 | ++*pos; | |
3009 | return ifa; | |
3010 | } | |
3011 | ||
3012 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
5c578aed | 3013 | __releases(rcu) |
1da177e4 | 3014 | { |
5c578aed | 3015 | rcu_read_unlock_bh(); |
1da177e4 LT |
3016 | } |
3017 | ||
3018 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3019 | { | |
3020 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3021 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3022 | &ifp->addr, |
1da177e4 LT |
3023 | ifp->idev->dev->ifindex, |
3024 | ifp->prefix_len, | |
3025 | ifp->scope, | |
3026 | ifp->flags, | |
3027 | ifp->idev->dev->name); | |
3028 | return 0; | |
3029 | } | |
3030 | ||
56b3d975 | 3031 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3032 | .start = if6_seq_start, |
3033 | .next = if6_seq_next, | |
3034 | .show = if6_seq_show, | |
3035 | .stop = if6_seq_stop, | |
3036 | }; | |
3037 | ||
3038 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3039 | { | |
3c40090a DL |
3040 | return seq_open_net(inode, file, &if6_seq_ops, |
3041 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3042 | } |
3043 | ||
9a32144e | 3044 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3045 | .owner = THIS_MODULE, |
3046 | .open = if6_seq_open, | |
3047 | .read = seq_read, | |
3048 | .llseek = seq_lseek, | |
3c40090a | 3049 | .release = seq_release_net, |
1da177e4 LT |
3050 | }; |
3051 | ||
2c8c1e72 | 3052 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3053 | { |
3c40090a | 3054 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3055 | return -ENOMEM; |
3056 | return 0; | |
3057 | } | |
3058 | ||
2c8c1e72 | 3059 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3060 | { |
3061 | proc_net_remove(net, "if_inet6"); | |
3062 | } | |
3063 | ||
3064 | static struct pernet_operations if6_proc_net_ops = { | |
3065 | .init = if6_proc_net_init, | |
3066 | .exit = if6_proc_net_exit, | |
3067 | }; | |
3068 | ||
3069 | int __init if6_proc_init(void) | |
3070 | { | |
3071 | return register_pernet_subsys(&if6_proc_net_ops); | |
3072 | } | |
3073 | ||
1da177e4 LT |
3074 | void if6_proc_exit(void) |
3075 | { | |
3c40090a | 3076 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3077 | } |
3078 | #endif /* CONFIG_PROC_FS */ | |
3079 | ||
59fbb3a6 | 3080 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3081 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3082 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3083 | { |
3084 | int ret = 0; | |
c2e21293 | 3085 | struct inet6_ifaddr *ifp = NULL; |
3086 | struct hlist_node *n; | |
3a88a81d | 3087 | unsigned int hash = ipv6_addr_hash(addr); |
c2e21293 | 3088 | |
5c578aed | 3089 | rcu_read_lock_bh(); |
3090 | hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 3091 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3092 | continue; |
caad295f | 3093 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3094 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3095 | ret = 1; | |
3096 | break; | |
3097 | } | |
3098 | } | |
5c578aed | 3099 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3100 | return ret; |
3101 | } | |
3102 | #endif | |
3103 | ||
1da177e4 LT |
3104 | /* |
3105 | * Periodic address status verification | |
3106 | */ | |
3107 | ||
3108 | static void addrconf_verify(unsigned long foo) | |
3109 | { | |
3110 | struct inet6_ifaddr *ifp; | |
c2e21293 | 3111 | struct hlist_node *node; |
1da177e4 LT |
3112 | unsigned long now, next; |
3113 | int i; | |
3114 | ||
5c578aed | 3115 | rcu_read_lock_bh(); |
3116 | spin_lock(&addrconf_verify_lock); | |
1da177e4 LT |
3117 | now = jiffies; |
3118 | next = now + ADDR_CHECK_FREQUENCY; | |
3119 | ||
3120 | del_timer(&addr_chk_timer); | |
3121 | ||
bcdd553f | 3122 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3123 | restart: |
5c578aed | 3124 | hlist_for_each_entry_rcu(ifp, node, |
3125 | &inet6_addr_lst[i], addr_lst) { | |
1da177e4 LT |
3126 | unsigned long age; |
3127 | #ifdef CONFIG_IPV6_PRIVACY | |
3128 | unsigned long regen_advance; | |
3129 | #endif | |
3130 | ||
3131 | if (ifp->flags & IFA_F_PERMANENT) | |
3132 | continue; | |
3133 | ||
3134 | spin_lock(&ifp->lock); | |
3135 | age = (now - ifp->tstamp) / HZ; | |
3136 | ||
3137 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3138 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3139 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3140 | ifp->idev->nd_parms->retrans_time / HZ; |
3141 | #endif | |
3142 | ||
8f27ebb9 YH |
3143 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3144 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3145 | spin_unlock(&ifp->lock); |
3146 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3147 | ipv6_del_addr(ifp); |
3148 | goto restart; | |
8f27ebb9 YH |
3149 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3150 | spin_unlock(&ifp->lock); | |
3151 | continue; | |
1da177e4 | 3152 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3153 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3154 | int deprecate = 0; |
3155 | ||
3156 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3157 | deprecate = 1; | |
3158 | ifp->flags |= IFA_F_DEPRECATED; | |
3159 | } | |
3160 | ||
3161 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3162 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3163 | ||
3164 | spin_unlock(&ifp->lock); | |
3165 | ||
3166 | if (deprecate) { | |
3167 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3168 | |
3169 | ipv6_ifa_notify(0, ifp); | |
3170 | in6_ifa_put(ifp); | |
3171 | goto restart; | |
3172 | } | |
3173 | #ifdef CONFIG_IPV6_PRIVACY | |
3174 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3175 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3176 | if (age >= ifp->prefered_lft - regen_advance) { | |
3177 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3178 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3179 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3180 | if (!ifp->regen_count && ifpub) { | |
3181 | ifp->regen_count++; | |
3182 | in6_ifa_hold(ifp); | |
3183 | in6_ifa_hold(ifpub); | |
3184 | spin_unlock(&ifp->lock); | |
5c578aed | 3185 | |
291d809b HY |
3186 | spin_lock(&ifpub->lock); |
3187 | ifpub->regen_count = 0; | |
3188 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3189 | ipv6_create_tempaddr(ifpub, ifp); |
3190 | in6_ifa_put(ifpub); | |
3191 | in6_ifa_put(ifp); | |
3192 | goto restart; | |
3193 | } | |
3194 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3195 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3196 | spin_unlock(&ifp->lock); | |
3197 | #endif | |
3198 | } else { | |
3199 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3200 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3201 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3202 | spin_unlock(&ifp->lock); | |
3203 | } | |
3204 | } | |
1da177e4 LT |
3205 | } |
3206 | ||
3207 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3208 | add_timer(&addr_chk_timer); | |
5c578aed | 3209 | spin_unlock(&addrconf_verify_lock); |
3210 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3211 | } |
3212 | ||
461d8837 TG |
3213 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3214 | { | |
3215 | struct in6_addr *pfx = NULL; | |
3216 | ||
3217 | if (addr) | |
3218 | pfx = nla_data(addr); | |
3219 | ||
3220 | if (local) { | |
3221 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3222 | pfx = NULL; | |
3223 | else | |
3224 | pfx = nla_data(local); | |
3225 | } | |
3226 | ||
3227 | return pfx; | |
3228 | } | |
3229 | ||
ef7c79ed | 3230 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3231 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3232 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3233 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3234 | }; | |
3235 | ||
1da177e4 LT |
3236 | static int |
3237 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3238 | { | |
3b1e0a65 | 3239 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3240 | struct ifaddrmsg *ifm; |
3241 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3242 | struct in6_addr *pfx; |
b933f716 | 3243 | int err; |
1da177e4 | 3244 | |
b933f716 TG |
3245 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3246 | if (err < 0) | |
3247 | return err; | |
3248 | ||
3249 | ifm = nlmsg_data(nlh); | |
3250 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3251 | if (pfx == NULL) |
3252 | return -EINVAL; | |
3253 | ||
af284937 | 3254 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3255 | } |
3256 | ||
55ebaef1 NT |
3257 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3258 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3259 | { |
6f704992 YH |
3260 | u32 flags; |
3261 | clock_t expires; | |
4bed72e4 | 3262 | unsigned long timeout; |
46d48046 | 3263 | |
081bba5b NT |
3264 | if (!valid_lft || (prefered_lft > valid_lft)) |
3265 | return -EINVAL; | |
3266 | ||
4bed72e4 YH |
3267 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3268 | if (addrconf_finite_timeout(timeout)) { | |
3269 | expires = jiffies_to_clock_t(timeout * HZ); | |
3270 | valid_lft = timeout; | |
6f704992 | 3271 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3272 | } else { |
3273 | expires = 0; | |
3274 | flags = 0; | |
3275 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3276 | } |
081bba5b | 3277 | |
4bed72e4 YH |
3278 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3279 | if (addrconf_finite_timeout(timeout)) { | |
3280 | if (timeout == 0) | |
3281 | ifa_flags |= IFA_F_DEPRECATED; | |
3282 | prefered_lft = timeout; | |
3283 | } | |
081bba5b NT |
3284 | |
3285 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3286 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3287 | ifp->tstamp = jiffies; |
3288 | ifp->valid_lft = valid_lft; | |
3289 | ifp->prefered_lft = prefered_lft; | |
3290 | ||
3291 | spin_unlock_bh(&ifp->lock); | |
3292 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3293 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3294 | |
46d48046 | 3295 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3296 | expires, flags); |
081bba5b NT |
3297 | addrconf_verify(0); |
3298 | ||
3299 | return 0; | |
3300 | } | |
3301 | ||
1da177e4 LT |
3302 | static int |
3303 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3304 | { | |
3b1e0a65 | 3305 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3306 | struct ifaddrmsg *ifm; |
3307 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3308 | struct in6_addr *pfx; |
7198f8ce TG |
3309 | struct inet6_ifaddr *ifa; |
3310 | struct net_device *dev; | |
55ebaef1 NT |
3311 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3312 | u8 ifa_flags; | |
461d8837 | 3313 | int err; |
1da177e4 | 3314 | |
461d8837 TG |
3315 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3316 | if (err < 0) | |
3317 | return err; | |
3318 | ||
3319 | ifm = nlmsg_data(nlh); | |
3320 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3321 | if (pfx == NULL) |
3322 | return -EINVAL; | |
3323 | ||
461d8837 | 3324 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3325 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3326 | |
3327 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3328 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3329 | preferred_lft = ci->ifa_prefered; |
3330 | } else { | |
3331 | preferred_lft = INFINITY_LIFE_TIME; | |
3332 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3333 | } |
3334 | ||
af284937 | 3335 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3336 | if (dev == NULL) |
3337 | return -ENODEV; | |
3338 | ||
55ebaef1 | 3339 | /* We ignore other flags so far. */ |
3b9f9a1c | 3340 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3341 | |
1cab3da6 | 3342 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3343 | if (ifa == NULL) { |
3344 | /* | |
3345 | * It would be best to check for !NLM_F_CREATE here but | |
3346 | * userspace alreay relies on not having to provide this. | |
3347 | */ | |
af284937 DL |
3348 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3349 | ifm->ifa_prefixlen, ifa_flags, | |
3350 | preferred_lft, valid_lft); | |
081bba5b NT |
3351 | } |
3352 | ||
7198f8ce TG |
3353 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3354 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3355 | err = -EEXIST; | |
3356 | else | |
55ebaef1 | 3357 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3358 | |
3359 | in6_ifa_put(ifa); | |
3360 | ||
3361 | return err; | |
1da177e4 LT |
3362 | } |
3363 | ||
101bb229 TG |
3364 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3365 | u8 scope, int ifindex) | |
3366 | { | |
3367 | struct ifaddrmsg *ifm; | |
3368 | ||
3369 | ifm = nlmsg_data(nlh); | |
3370 | ifm->ifa_family = AF_INET6; | |
3371 | ifm->ifa_prefixlen = prefixlen; | |
3372 | ifm->ifa_flags = flags; | |
3373 | ifm->ifa_scope = scope; | |
3374 | ifm->ifa_index = ifindex; | |
3375 | } | |
3376 | ||
85486af0 TG |
3377 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3378 | unsigned long tstamp, u32 preferred, u32 valid) | |
3379 | { | |
3380 | struct ifa_cacheinfo ci; | |
3381 | ||
3382 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3383 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3384 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3385 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3386 | ci.ifa_prefered = preferred; | |
3387 | ci.ifa_valid = valid; | |
3388 | ||
3389 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3390 | } | |
3391 | ||
101bb229 TG |
3392 | static inline int rt_scope(int ifa_scope) |
3393 | { | |
3394 | if (ifa_scope & IFA_HOST) | |
3395 | return RT_SCOPE_HOST; | |
3396 | else if (ifa_scope & IFA_LINK) | |
3397 | return RT_SCOPE_LINK; | |
3398 | else if (ifa_scope & IFA_SITE) | |
3399 | return RT_SCOPE_SITE; | |
3400 | else | |
3401 | return RT_SCOPE_UNIVERSE; | |
3402 | } | |
3403 | ||
0ab6803b TG |
3404 | static inline int inet6_ifaddr_msgsize(void) |
3405 | { | |
339bf98f TG |
3406 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3407 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3408 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3409 | } |
c5396a31 | 3410 | |
1da177e4 | 3411 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3412 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3413 | { |
1da177e4 | 3414 | struct nlmsghdr *nlh; |
85486af0 | 3415 | u32 preferred, valid; |
1da177e4 | 3416 | |
0ab6803b TG |
3417 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3418 | if (nlh == NULL) | |
26932566 | 3419 | return -EMSGSIZE; |
0ab6803b | 3420 | |
101bb229 TG |
3421 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3422 | ifa->idev->dev->ifindex); | |
3423 | ||
1da177e4 | 3424 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3425 | preferred = ifa->prefered_lft; |
3426 | valid = ifa->valid_lft; | |
3427 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3428 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3429 | if (preferred > tval) |
3430 | preferred -= tval; | |
3431 | else | |
3432 | preferred = 0; | |
85486af0 TG |
3433 | if (valid != INFINITY_LIFE_TIME) |
3434 | valid -= tval; | |
1da177e4 LT |
3435 | } |
3436 | } else { | |
85486af0 TG |
3437 | preferred = INFINITY_LIFE_TIME; |
3438 | valid = INFINITY_LIFE_TIME; | |
3439 | } | |
3440 | ||
0ab6803b | 3441 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3442 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3443 | nlmsg_cancel(skb, nlh); | |
3444 | return -EMSGSIZE; | |
3445 | } | |
1da177e4 | 3446 | |
0ab6803b | 3447 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3448 | } |
3449 | ||
3450 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3451 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3452 | { |
1da177e4 | 3453 | struct nlmsghdr *nlh; |
101bb229 TG |
3454 | u8 scope = RT_SCOPE_UNIVERSE; |
3455 | int ifindex = ifmca->idev->dev->ifindex; | |
3456 | ||
3457 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3458 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3459 | |
0ab6803b TG |
3460 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3461 | if (nlh == NULL) | |
26932566 | 3462 | return -EMSGSIZE; |
85486af0 | 3463 | |
0ab6803b TG |
3464 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3465 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3466 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3467 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3468 | nlmsg_cancel(skb, nlh); | |
3469 | return -EMSGSIZE; | |
3470 | } | |
85486af0 | 3471 | |
0ab6803b | 3472 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3473 | } |
3474 | ||
3475 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3476 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3477 | { |
1da177e4 | 3478 | struct nlmsghdr *nlh; |
101bb229 TG |
3479 | u8 scope = RT_SCOPE_UNIVERSE; |
3480 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3481 | ||
3482 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3483 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3484 | |
0ab6803b TG |
3485 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3486 | if (nlh == NULL) | |
26932566 | 3487 | return -EMSGSIZE; |
85486af0 | 3488 | |
0ab6803b TG |
3489 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3490 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3491 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3492 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3493 | nlmsg_cancel(skb, nlh); | |
3494 | return -EMSGSIZE; | |
3495 | } | |
1da177e4 | 3496 | |
0ab6803b | 3497 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3498 | } |
3499 | ||
e21e8467 | 3500 | enum addr_type_t { |
1da177e4 LT |
3501 | UNICAST_ADDR, |
3502 | MULTICAST_ADDR, | |
3503 | ANYCAST_ADDR, | |
3504 | }; | |
3505 | ||
234b27c3 ED |
3506 | /* called with rcu_read_lock() */ |
3507 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3508 | struct netlink_callback *cb, enum addr_type_t type, | |
3509 | int s_ip_idx, int *p_ip_idx) | |
3510 | { | |
234b27c3 ED |
3511 | struct ifmcaddr6 *ifmca; |
3512 | struct ifacaddr6 *ifaca; | |
3513 | int err = 1; | |
3514 | int ip_idx = *p_ip_idx; | |
3515 | ||
3516 | read_lock_bh(&idev->lock); | |
3517 | switch (type) { | |
502a2ffd | 3518 | case UNICAST_ADDR: { |
3519 | struct inet6_ifaddr *ifa; | |
3520 | ||
234b27c3 | 3521 | /* unicast address incl. temp addr */ |
502a2ffd | 3522 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3523 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3524 | continue; |
3525 | err = inet6_fill_ifaddr(skb, ifa, | |
3526 | NETLINK_CB(cb->skb).pid, | |
3527 | cb->nlh->nlmsg_seq, | |
3528 | RTM_NEWADDR, | |
3529 | NLM_F_MULTI); | |
3530 | if (err <= 0) | |
3531 | break; | |
3532 | } | |
3533 | break; | |
502a2ffd | 3534 | } |
234b27c3 ED |
3535 | case MULTICAST_ADDR: |
3536 | /* multicast address */ | |
3537 | for (ifmca = idev->mc_list; ifmca; | |
3538 | ifmca = ifmca->next, ip_idx++) { | |
3539 | if (ip_idx < s_ip_idx) | |
3540 | continue; | |
3541 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3542 | NETLINK_CB(cb->skb).pid, | |
3543 | cb->nlh->nlmsg_seq, | |
3544 | RTM_GETMULTICAST, | |
3545 | NLM_F_MULTI); | |
3546 | if (err <= 0) | |
3547 | break; | |
3548 | } | |
3549 | break; | |
3550 | case ANYCAST_ADDR: | |
3551 | /* anycast address */ | |
3552 | for (ifaca = idev->ac_list; ifaca; | |
3553 | ifaca = ifaca->aca_next, ip_idx++) { | |
3554 | if (ip_idx < s_ip_idx) | |
3555 | continue; | |
3556 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3557 | NETLINK_CB(cb->skb).pid, | |
3558 | cb->nlh->nlmsg_seq, | |
3559 | RTM_GETANYCAST, | |
3560 | NLM_F_MULTI); | |
3561 | if (err <= 0) | |
3562 | break; | |
3563 | } | |
3564 | break; | |
3565 | default: | |
3566 | break; | |
3567 | } | |
3568 | read_unlock_bh(&idev->lock); | |
3569 | *p_ip_idx = ip_idx; | |
3570 | return err; | |
3571 | } | |
3572 | ||
1da177e4 LT |
3573 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3574 | enum addr_type_t type) | |
3575 | { | |
234b27c3 ED |
3576 | struct net *net = sock_net(skb->sk); |
3577 | int h, s_h; | |
1da177e4 LT |
3578 | int idx, ip_idx; |
3579 | int s_idx, s_ip_idx; | |
1da177e4 | 3580 | struct net_device *dev; |
234b27c3 ED |
3581 | struct inet6_dev *idev; |
3582 | struct hlist_head *head; | |
3583 | struct hlist_node *node; | |
1ab1457c | 3584 | |
234b27c3 ED |
3585 | s_h = cb->args[0]; |
3586 | s_idx = idx = cb->args[1]; | |
3587 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3588 | |
234b27c3 ED |
3589 | rcu_read_lock(); |
3590 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3591 | idx = 0; | |
3592 | head = &net->dev_index_head[h]; | |
3593 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3594 | if (idx < s_idx) | |
3595 | goto cont; | |
3596 | if (idx > s_idx) | |
3597 | s_ip_idx = 0; | |
3598 | ip_idx = 0; | |
e21e8467 SH |
3599 | idev = __in6_dev_get(dev); |
3600 | if (!idev) | |
234b27c3 ED |
3601 | goto cont; |
3602 | ||
3603 | if (in6_dump_addrs(idev, skb, cb, type, | |
3604 | s_ip_idx, &ip_idx) <= 0) | |
3605 | goto done; | |
7562f876 | 3606 | cont: |
234b27c3 ED |
3607 | idx++; |
3608 | } | |
1da177e4 | 3609 | } |
234b27c3 ED |
3610 | done: |
3611 | rcu_read_unlock(); | |
3612 | cb->args[0] = h; | |
3613 | cb->args[1] = idx; | |
3614 | cb->args[2] = ip_idx; | |
3615 | ||
1da177e4 LT |
3616 | return skb->len; |
3617 | } | |
3618 | ||
3619 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3620 | { | |
3621 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3622 | |
1da177e4 LT |
3623 | return inet6_dump_addr(skb, cb, type); |
3624 | } | |
3625 | ||
3626 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3627 | { | |
3628 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3629 | |
1da177e4 LT |
3630 | return inet6_dump_addr(skb, cb, type); |
3631 | } | |
3632 | ||
3633 | ||
3634 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3635 | { | |
3636 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3637 | |
1da177e4 LT |
3638 | return inet6_dump_addr(skb, cb, type); |
3639 | } | |
3640 | ||
1b29fc2c TG |
3641 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3642 | void *arg) | |
6c223828 | 3643 | { |
3b1e0a65 | 3644 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3645 | struct ifaddrmsg *ifm; |
3646 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3647 | struct in6_addr *addr = NULL; |
3648 | struct net_device *dev = NULL; | |
3649 | struct inet6_ifaddr *ifa; | |
3650 | struct sk_buff *skb; | |
6c223828 NT |
3651 | int err; |
3652 | ||
1b29fc2c TG |
3653 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3654 | if (err < 0) | |
3655 | goto errout; | |
3656 | ||
3657 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3658 | if (addr == NULL) { | |
3659 | err = -EINVAL; | |
3660 | goto errout; | |
6c223828 | 3661 | } |
6c223828 | 3662 | |
1b29fc2c | 3663 | ifm = nlmsg_data(nlh); |
6c223828 | 3664 | if (ifm->ifa_index) |
6fda7350 | 3665 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3666 | |
e21e8467 SH |
3667 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3668 | if (!ifa) { | |
1b29fc2c TG |
3669 | err = -EADDRNOTAVAIL; |
3670 | goto errout; | |
3671 | } | |
6c223828 | 3672 | |
e21e8467 SH |
3673 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3674 | if (!skb) { | |
6c223828 | 3675 | err = -ENOBUFS; |
1b29fc2c | 3676 | goto errout_ifa; |
6c223828 NT |
3677 | } |
3678 | ||
6c223828 NT |
3679 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3680 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3681 | if (err < 0) { |
3682 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3683 | WARN_ON(err == -EMSGSIZE); | |
3684 | kfree_skb(skb); | |
3685 | goto errout_ifa; | |
3686 | } | |
6fda7350 | 3687 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3688 | errout_ifa: |
6c223828 | 3689 | in6_ifa_put(ifa); |
1b29fc2c | 3690 | errout: |
6c223828 | 3691 | return err; |
6c223828 NT |
3692 | } |
3693 | ||
1da177e4 LT |
3694 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3695 | { | |
3696 | struct sk_buff *skb; | |
c346dca1 | 3697 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3698 | int err = -ENOBUFS; |
1da177e4 | 3699 | |
0ab6803b | 3700 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3701 | if (skb == NULL) |
3702 | goto errout; | |
3703 | ||
3704 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3705 | if (err < 0) { |
3706 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3707 | WARN_ON(err == -EMSGSIZE); | |
3708 | kfree_skb(skb); | |
3709 | goto errout; | |
3710 | } | |
1ce85fe4 PNA |
3711 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3712 | return; | |
5d620266 TG |
3713 | errout: |
3714 | if (err < 0) | |
6fda7350 | 3715 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3716 | } |
3717 | ||
b6f99a21 | 3718 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3719 | __s32 *array, int bytes) |
3720 | { | |
04561c1f TG |
3721 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3722 | ||
1da177e4 LT |
3723 | memset(array, 0, bytes); |
3724 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3725 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3726 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3727 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3728 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3729 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3730 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3731 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3732 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3733 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3734 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3735 | #ifdef CONFIG_IPV6_PRIVACY | |
3736 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3737 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3738 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3739 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3740 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3741 | #endif | |
3742 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3743 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3744 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3745 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3746 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3747 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3748 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3749 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3750 | #endif | |
930d6ff2 | 3751 | #endif |
fbea49e1 | 3752 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3753 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3754 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3755 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3756 | #endif | |
7bc570c8 YH |
3757 | #ifdef CONFIG_IPV6_MROUTE |
3758 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3759 | #endif | |
778d80be | 3760 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3761 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3762 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3763 | } |
3764 | ||
339bf98f TG |
3765 | static inline size_t inet6_if_nlmsg_size(void) |
3766 | { | |
3767 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3768 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3769 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3770 | + nla_total_size(4) /* IFLA_MTU */ | |
3771 | + nla_total_size(4) /* IFLA_LINK */ | |
3772 | + nla_total_size( /* IFLA_PROTINFO */ | |
3773 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3774 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3775 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3776 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3777 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3778 | ); |
3779 | } | |
c5396a31 | 3780 | |
7d720c3e TH |
3781 | static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib, |
3782 | int items, int bytes) | |
7f7d9a6b HX |
3783 | { |
3784 | int i; | |
3785 | int pad = bytes - sizeof(u64) * items; | |
3786 | BUG_ON(pad < 0); | |
3787 | ||
3788 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3789 | put_unaligned(items, &stats[0]); | |
3790 | for (i = 1; i < items; i++) | |
3791 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3792 | ||
3793 | memset(&stats[items], 0, pad); | |
3794 | } | |
3795 | ||
3796 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3797 | int bytes) | |
3798 | { | |
e21e8467 | 3799 | switch (attrtype) { |
7f7d9a6b | 3800 | case IFLA_INET6_STATS: |
7d720c3e | 3801 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
7f7d9a6b HX |
3802 | break; |
3803 | case IFLA_INET6_ICMP6STATS: | |
7d720c3e | 3804 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3805 | break; |
3806 | } | |
3807 | } | |
3808 | ||
1ab1457c | 3809 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3810 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3811 | { |
04561c1f | 3812 | struct net_device *dev = idev->dev; |
bf99f1bd | 3813 | struct nlattr *nla; |
04561c1f TG |
3814 | struct ifinfomsg *hdr; |
3815 | struct nlmsghdr *nlh; | |
3816 | void *protoinfo; | |
3817 | struct ifla_cacheinfo ci; | |
3818 | ||
3819 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3820 | if (nlh == NULL) | |
26932566 | 3821 | return -EMSGSIZE; |
04561c1f TG |
3822 | |
3823 | hdr = nlmsg_data(nlh); | |
3824 | hdr->ifi_family = AF_INET6; | |
3825 | hdr->__ifi_pad = 0; | |
3826 | hdr->ifi_type = dev->type; | |
3827 | hdr->ifi_index = dev->ifindex; | |
3828 | hdr->ifi_flags = dev_get_flags(dev); | |
3829 | hdr->ifi_change = 0; | |
3830 | ||
3831 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3832 | |
3833 | if (dev->addr_len) | |
04561c1f | 3834 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3835 | |
04561c1f | 3836 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3837 | if (dev->ifindex != dev->iflink) |
04561c1f | 3838 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3839 | |
04561c1f TG |
3840 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3841 | if (protoinfo == NULL) | |
3842 | goto nla_put_failure; | |
1da177e4 | 3843 | |
04561c1f | 3844 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3845 | |
1da177e4 LT |
3846 | ci.max_reasm_len = IPV6_MAXPLEN; |
3847 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3848 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3849 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3850 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3851 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3852 | ||
bf99f1bd YH |
3853 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3854 | if (nla == NULL) | |
04561c1f | 3855 | goto nla_put_failure; |
bf99f1bd | 3856 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3857 | |
bf99f1bd YH |
3858 | /* XXX - MC not implemented */ |
3859 | ||
3860 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3861 | if (nla == NULL) | |
3862 | goto nla_put_failure; | |
3863 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3864 | ||
3865 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3866 | if (nla == NULL) | |
3867 | goto nla_put_failure; | |
3868 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3869 | |
04561c1f TG |
3870 | nla_nest_end(skb, protoinfo); |
3871 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3872 | |
04561c1f | 3873 | nla_put_failure: |
26932566 PM |
3874 | nlmsg_cancel(skb, nlh); |
3875 | return -EMSGSIZE; | |
1da177e4 LT |
3876 | } |
3877 | ||
3878 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3879 | { | |
3b1e0a65 | 3880 | struct net *net = sock_net(skb->sk); |
84d2697d | 3881 | int h, s_h; |
434a8a58 | 3882 | int idx = 0, s_idx; |
1da177e4 LT |
3883 | struct net_device *dev; |
3884 | struct inet6_dev *idev; | |
84d2697d ED |
3885 | struct hlist_head *head; |
3886 | struct hlist_node *node; | |
1da177e4 | 3887 | |
84d2697d ED |
3888 | s_h = cb->args[0]; |
3889 | s_idx = cb->args[1]; | |
3890 | ||
3891 | rcu_read_lock(); | |
3892 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3893 | idx = 0; | |
3894 | head = &net->dev_index_head[h]; | |
3895 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3896 | if (idx < s_idx) | |
3897 | goto cont; | |
3898 | idev = __in6_dev_get(dev); | |
3899 | if (!idev) | |
3900 | goto cont; | |
3901 | if (inet6_fill_ifinfo(skb, idev, | |
3902 | NETLINK_CB(cb->skb).pid, | |
3903 | cb->nlh->nlmsg_seq, | |
3904 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
3905 | goto out; | |
7562f876 | 3906 | cont: |
84d2697d ED |
3907 | idx++; |
3908 | } | |
1da177e4 | 3909 | } |
84d2697d ED |
3910 | out: |
3911 | rcu_read_unlock(); | |
3912 | cb->args[1] = idx; | |
3913 | cb->args[0] = h; | |
1da177e4 LT |
3914 | |
3915 | return skb->len; | |
3916 | } | |
3917 | ||
3918 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3919 | { | |
3920 | struct sk_buff *skb; | |
c346dca1 | 3921 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3922 | int err = -ENOBUFS; |
1ab1457c | 3923 | |
339bf98f | 3924 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3925 | if (skb == NULL) |
3926 | goto errout; | |
3927 | ||
3928 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3929 | if (err < 0) { |
3930 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3931 | WARN_ON(err == -EMSGSIZE); | |
3932 | kfree_skb(skb); | |
3933 | goto errout; | |
3934 | } | |
1ce85fe4 PNA |
3935 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3936 | return; | |
8d7a76c9 TG |
3937 | errout: |
3938 | if (err < 0) | |
6fda7350 | 3939 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3940 | } |
3941 | ||
339bf98f TG |
3942 | static inline size_t inet6_prefix_nlmsg_size(void) |
3943 | { | |
3944 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3945 | + nla_total_size(sizeof(struct in6_addr)) | |
3946 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3947 | } | |
c5396a31 | 3948 | |
1da177e4 | 3949 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3950 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3951 | int event, unsigned int flags) | |
1da177e4 | 3952 | { |
6051e2f4 TG |
3953 | struct prefixmsg *pmsg; |
3954 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3955 | struct prefix_cacheinfo ci; |
3956 | ||
6051e2f4 TG |
3957 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3958 | if (nlh == NULL) | |
26932566 | 3959 | return -EMSGSIZE; |
6051e2f4 TG |
3960 | |
3961 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3962 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3963 | pmsg->prefix_pad1 = 0; |
3964 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3965 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3966 | pmsg->prefix_len = pinfo->prefix_len; | |
3967 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3968 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3969 | pmsg->prefix_flags = 0; |
3970 | if (pinfo->onlink) | |
3971 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3972 | if (pinfo->autoconf) | |
3973 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3974 | ||
6051e2f4 | 3975 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3976 | |
3977 | ci.preferred_time = ntohl(pinfo->prefered); | |
3978 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3979 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3980 | |
6051e2f4 | 3981 | return nlmsg_end(skb, nlh); |
1da177e4 | 3982 | |
6051e2f4 | 3983 | nla_put_failure: |
26932566 PM |
3984 | nlmsg_cancel(skb, nlh); |
3985 | return -EMSGSIZE; | |
1da177e4 LT |
3986 | } |
3987 | ||
1ab1457c | 3988 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3989 | struct prefix_info *pinfo) |
3990 | { | |
3991 | struct sk_buff *skb; | |
c346dca1 | 3992 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3993 | int err = -ENOBUFS; |
1da177e4 | 3994 | |
339bf98f | 3995 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3996 | if (skb == NULL) |
3997 | goto errout; | |
3998 | ||
3999 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4000 | if (err < 0) { |
4001 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4002 | WARN_ON(err == -EMSGSIZE); | |
4003 | kfree_skb(skb); | |
4004 | goto errout; | |
4005 | } | |
1ce85fe4 PNA |
4006 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4007 | return; | |
8c384bfa TG |
4008 | errout: |
4009 | if (err < 0) | |
6fda7350 | 4010 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4011 | } |
4012 | ||
1da177e4 LT |
4013 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4014 | { | |
4015 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4016 | ||
4017 | switch (event) { | |
4018 | case RTM_NEWADDR: | |
95c385b4 NH |
4019 | /* |
4020 | * If the address was optimistic | |
4021 | * we inserted the route at the start of | |
4022 | * our DAD process, so we don't need | |
4023 | * to do it again | |
4024 | */ | |
4025 | if (!(ifp->rt->rt6i_node)) | |
4026 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4027 | if (ifp->idev->cnf.forwarding) |
4028 | addrconf_join_anycast(ifp); | |
4029 | break; | |
4030 | case RTM_DELADDR: | |
4031 | if (ifp->idev->cnf.forwarding) | |
4032 | addrconf_leave_anycast(ifp); | |
4033 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
4034 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 4035 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 4036 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
4037 | break; |
4038 | } | |
4039 | } | |
4040 | ||
4041 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4042 | { | |
8814c4b5 | 4043 | rcu_read_lock_bh(); |
1da177e4 LT |
4044 | if (likely(ifp->idev->dead == 0)) |
4045 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4046 | rcu_read_unlock_bh(); |
1da177e4 LT |
4047 | } |
4048 | ||
4049 | #ifdef CONFIG_SYSCTL | |
4050 | ||
4051 | static | |
8d65af78 | 4052 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4053 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4054 | { | |
4055 | int *valp = ctl->data; | |
4056 | int val = *valp; | |
88af182e | 4057 | loff_t pos = *ppos; |
1da177e4 LT |
4058 | int ret; |
4059 | ||
8d65af78 | 4060 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 | 4061 | |
c8fecf22 | 4062 | if (write) |
b325fddb | 4063 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4064 | if (ret) |
4065 | *ppos = pos; | |
1ab1457c | 4066 | return ret; |
1da177e4 LT |
4067 | } |
4068 | ||
56d417b1 BH |
4069 | static void dev_disable_change(struct inet6_dev *idev) |
4070 | { | |
4071 | if (!idev || !idev->dev) | |
4072 | return; | |
4073 | ||
4074 | if (idev->cnf.disable_ipv6) | |
4075 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4076 | else | |
4077 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4078 | } | |
4079 | ||
4080 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4081 | { | |
4082 | struct net_device *dev; | |
4083 | struct inet6_dev *idev; | |
4084 | ||
c6d14c84 ED |
4085 | rcu_read_lock(); |
4086 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4087 | idev = __in6_dev_get(dev); |
4088 | if (idev) { | |
4089 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4090 | idev->cnf.disable_ipv6 = newf; | |
4091 | if (changed) | |
4092 | dev_disable_change(idev); | |
4093 | } | |
56d417b1 | 4094 | } |
c6d14c84 | 4095 | rcu_read_unlock(); |
56d417b1 BH |
4096 | } |
4097 | ||
4098 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) | |
4099 | { | |
4100 | struct net *net; | |
4101 | ||
4102 | net = (struct net *)table->extra2; | |
4103 | ||
4104 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) | |
4105 | return 0; | |
4106 | ||
88af182e EB |
4107 | if (!rtnl_trylock()) { |
4108 | /* Restore the original values before restarting */ | |
4109 | *p = old; | |
56d417b1 | 4110 | return restart_syscall(); |
88af182e | 4111 | } |
56d417b1 BH |
4112 | |
4113 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
4114 | __s32 newf = net->ipv6.devconf_all->disable_ipv6; | |
4115 | net->ipv6.devconf_dflt->disable_ipv6 = newf; | |
4116 | addrconf_disable_change(net, newf); | |
4117 | } else if ((!*p) ^ (!old)) | |
4118 | dev_disable_change((struct inet6_dev *)table->extra1); | |
4119 | ||
4120 | rtnl_unlock(); | |
4121 | return 0; | |
4122 | } | |
4123 | ||
4124 | static | |
8d65af78 | 4125 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4126 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4127 | { | |
4128 | int *valp = ctl->data; | |
4129 | int val = *valp; | |
88af182e | 4130 | loff_t pos = *ppos; |
56d417b1 BH |
4131 | int ret; |
4132 | ||
8d65af78 | 4133 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
56d417b1 BH |
4134 | |
4135 | if (write) | |
4136 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4137 | if (ret) |
4138 | *ppos = pos; | |
56d417b1 BH |
4139 | return ret; |
4140 | } | |
4141 | ||
1da177e4 LT |
4142 | static struct addrconf_sysctl_table |
4143 | { | |
4144 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4145 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4146 | char *dev_name; |
ab32ea5d | 4147 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4148 | .sysctl_header = NULL, |
4149 | .addrconf_vars = { | |
1ab1457c | 4150 | { |
e21e8467 SH |
4151 | .procname = "forwarding", |
4152 | .data = &ipv6_devconf.forwarding, | |
4153 | .maxlen = sizeof(int), | |
4154 | .mode = 0644, | |
4155 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4156 | }, |
4157 | { | |
e21e8467 SH |
4158 | .procname = "hop_limit", |
4159 | .data = &ipv6_devconf.hop_limit, | |
4160 | .maxlen = sizeof(int), | |
4161 | .mode = 0644, | |
4162 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4163 | }, |
4164 | { | |
e21e8467 SH |
4165 | .procname = "mtu", |
4166 | .data = &ipv6_devconf.mtu6, | |
4167 | .maxlen = sizeof(int), | |
4168 | .mode = 0644, | |
4169 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4170 | }, |
4171 | { | |
e21e8467 SH |
4172 | .procname = "accept_ra", |
4173 | .data = &ipv6_devconf.accept_ra, | |
4174 | .maxlen = sizeof(int), | |
4175 | .mode = 0644, | |
4176 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4177 | }, |
4178 | { | |
e21e8467 SH |
4179 | .procname = "accept_redirects", |
4180 | .data = &ipv6_devconf.accept_redirects, | |
4181 | .maxlen = sizeof(int), | |
4182 | .mode = 0644, | |
4183 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4184 | }, |
4185 | { | |
e21e8467 SH |
4186 | .procname = "autoconf", |
4187 | .data = &ipv6_devconf.autoconf, | |
4188 | .maxlen = sizeof(int), | |
4189 | .mode = 0644, | |
4190 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4191 | }, |
4192 | { | |
e21e8467 SH |
4193 | .procname = "dad_transmits", |
4194 | .data = &ipv6_devconf.dad_transmits, | |
4195 | .maxlen = sizeof(int), | |
4196 | .mode = 0644, | |
4197 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4198 | }, |
4199 | { | |
e21e8467 SH |
4200 | .procname = "router_solicitations", |
4201 | .data = &ipv6_devconf.rtr_solicits, | |
4202 | .maxlen = sizeof(int), | |
4203 | .mode = 0644, | |
4204 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4205 | }, |
4206 | { | |
e21e8467 SH |
4207 | .procname = "router_solicitation_interval", |
4208 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4209 | .maxlen = sizeof(int), | |
4210 | .mode = 0644, | |
4211 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4212 | }, |
4213 | { | |
e21e8467 SH |
4214 | .procname = "router_solicitation_delay", |
4215 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4216 | .maxlen = sizeof(int), | |
4217 | .mode = 0644, | |
4218 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4219 | }, |
4220 | { | |
e21e8467 SH |
4221 | .procname = "force_mld_version", |
4222 | .data = &ipv6_devconf.force_mld_version, | |
4223 | .maxlen = sizeof(int), | |
4224 | .mode = 0644, | |
4225 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4226 | }, |
4227 | #ifdef CONFIG_IPV6_PRIVACY | |
4228 | { | |
e21e8467 SH |
4229 | .procname = "use_tempaddr", |
4230 | .data = &ipv6_devconf.use_tempaddr, | |
4231 | .maxlen = sizeof(int), | |
4232 | .mode = 0644, | |
4233 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4234 | }, |
4235 | { | |
e21e8467 SH |
4236 | .procname = "temp_valid_lft", |
4237 | .data = &ipv6_devconf.temp_valid_lft, | |
4238 | .maxlen = sizeof(int), | |
4239 | .mode = 0644, | |
4240 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4241 | }, |
4242 | { | |
e21e8467 SH |
4243 | .procname = "temp_prefered_lft", |
4244 | .data = &ipv6_devconf.temp_prefered_lft, | |
4245 | .maxlen = sizeof(int), | |
4246 | .mode = 0644, | |
4247 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4248 | }, |
4249 | { | |
e21e8467 SH |
4250 | .procname = "regen_max_retry", |
4251 | .data = &ipv6_devconf.regen_max_retry, | |
4252 | .maxlen = sizeof(int), | |
4253 | .mode = 0644, | |
4254 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4255 | }, |
4256 | { | |
e21e8467 SH |
4257 | .procname = "max_desync_factor", |
4258 | .data = &ipv6_devconf.max_desync_factor, | |
4259 | .maxlen = sizeof(int), | |
4260 | .mode = 0644, | |
4261 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4262 | }, |
4263 | #endif | |
4264 | { | |
e21e8467 SH |
4265 | .procname = "max_addresses", |
4266 | .data = &ipv6_devconf.max_addresses, | |
4267 | .maxlen = sizeof(int), | |
4268 | .mode = 0644, | |
4269 | .proc_handler = proc_dointvec, | |
1da177e4 | 4270 | }, |
65f5c7c1 | 4271 | { |
e21e8467 SH |
4272 | .procname = "accept_ra_defrtr", |
4273 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4274 | .maxlen = sizeof(int), | |
4275 | .mode = 0644, | |
4276 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4277 | }, |
c4fd30eb | 4278 | { |
e21e8467 SH |
4279 | .procname = "accept_ra_pinfo", |
4280 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4281 | .maxlen = sizeof(int), | |
4282 | .mode = 0644, | |
4283 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4284 | }, |
930d6ff2 YH |
4285 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4286 | { | |
e21e8467 SH |
4287 | .procname = "accept_ra_rtr_pref", |
4288 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4289 | .maxlen = sizeof(int), | |
4290 | .mode = 0644, | |
4291 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4292 | }, |
52e16356 | 4293 | { |
e21e8467 SH |
4294 | .procname = "router_probe_interval", |
4295 | .data = &ipv6_devconf.rtr_probe_interval, | |
4296 | .maxlen = sizeof(int), | |
4297 | .mode = 0644, | |
4298 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4299 | }, |
fa03ef38 | 4300 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4301 | { |
e21e8467 SH |
4302 | .procname = "accept_ra_rt_info_max_plen", |
4303 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4304 | .maxlen = sizeof(int), | |
4305 | .mode = 0644, | |
4306 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4307 | }, |
4308 | #endif | |
930d6ff2 | 4309 | #endif |
fbea49e1 | 4310 | { |
e21e8467 SH |
4311 | .procname = "proxy_ndp", |
4312 | .data = &ipv6_devconf.proxy_ndp, | |
4313 | .maxlen = sizeof(int), | |
4314 | .mode = 0644, | |
4315 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4316 | }, |
0bcbc926 | 4317 | { |
e21e8467 SH |
4318 | .procname = "accept_source_route", |
4319 | .data = &ipv6_devconf.accept_source_route, | |
4320 | .maxlen = sizeof(int), | |
4321 | .mode = 0644, | |
4322 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4323 | }, |
95c385b4 NH |
4324 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4325 | { | |
e21e8467 SH |
4326 | .procname = "optimistic_dad", |
4327 | .data = &ipv6_devconf.optimistic_dad, | |
4328 | .maxlen = sizeof(int), | |
4329 | .mode = 0644, | |
4330 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4331 | |
4332 | }, | |
7bc570c8 YH |
4333 | #endif |
4334 | #ifdef CONFIG_IPV6_MROUTE | |
4335 | { | |
e21e8467 SH |
4336 | .procname = "mc_forwarding", |
4337 | .data = &ipv6_devconf.mc_forwarding, | |
4338 | .maxlen = sizeof(int), | |
4339 | .mode = 0444, | |
4340 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4341 | }, |
95c385b4 | 4342 | #endif |
778d80be | 4343 | { |
e21e8467 SH |
4344 | .procname = "disable_ipv6", |
4345 | .data = &ipv6_devconf.disable_ipv6, | |
4346 | .maxlen = sizeof(int), | |
4347 | .mode = 0644, | |
4348 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4349 | }, |
1b34be74 | 4350 | { |
e21e8467 SH |
4351 | .procname = "accept_dad", |
4352 | .data = &ipv6_devconf.accept_dad, | |
4353 | .maxlen = sizeof(int), | |
4354 | .mode = 0644, | |
4355 | .proc_handler = proc_dointvec, | |
1b34be74 | 4356 | }, |
f7734fdf | 4357 | { |
f7734fdf OP |
4358 | .procname = "force_tllao", |
4359 | .data = &ipv6_devconf.force_tllao, | |
4360 | .maxlen = sizeof(int), | |
4361 | .mode = 0644, | |
4362 | .proc_handler = proc_dointvec | |
4363 | }, | |
1da177e4 | 4364 | { |
f8572d8f | 4365 | /* sentinel */ |
1da177e4 LT |
4366 | } |
4367 | }, | |
1da177e4 LT |
4368 | }; |
4369 | ||
bff16c2f | 4370 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4371 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4372 | { |
4373 | int i; | |
1da177e4 | 4374 | struct addrconf_sysctl_table *t; |
1da177e4 | 4375 | |
1dab6222 PE |
4376 | #define ADDRCONF_CTL_PATH_DEV 3 |
4377 | ||
4378 | struct ctl_path addrconf_ctl_path[] = { | |
f8572d8f EB |
4379 | { .procname = "net", }, |
4380 | { .procname = "ipv6", }, | |
4381 | { .procname = "conf", }, | |
1dab6222 PE |
4382 | { /* to be set */ }, |
4383 | { }, | |
4384 | }; | |
4385 | ||
4386 | ||
af879cc7 | 4387 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4388 | if (t == NULL) |
f68635e6 PE |
4389 | goto out; |
4390 | ||
bcdd553f | 4391 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4392 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4393 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4394 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4395 | } |
1da177e4 | 4396 | |
1ab1457c YH |
4397 | /* |
4398 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4399 | * by sysctl and we wouldn't want anyone to change it under our feet |
4400 | * (see SIOCSIFNAME). | |
1ab1457c | 4401 | */ |
1dab6222 PE |
4402 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4403 | if (!t->dev_name) | |
f68635e6 | 4404 | goto free; |
1da177e4 | 4405 | |
1dab6222 | 4406 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
1da177e4 | 4407 | |
bff16c2f | 4408 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4409 | t->addrconf_vars); |
1da177e4 LT |
4410 | if (t->sysctl_header == NULL) |
4411 | goto free_procname; | |
f68635e6 PE |
4412 | |
4413 | p->sysctl = t; | |
95897312 | 4414 | return 0; |
1da177e4 | 4415 | |
f68635e6 | 4416 | free_procname: |
1dab6222 | 4417 | kfree(t->dev_name); |
f68635e6 | 4418 | free: |
1da177e4 | 4419 | kfree(t); |
f68635e6 | 4420 | out: |
95897312 | 4421 | return -ENOBUFS; |
1da177e4 LT |
4422 | } |
4423 | ||
408c4768 PE |
4424 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4425 | { | |
4426 | struct addrconf_sysctl_table *t; | |
4427 | ||
4428 | if (p->sysctl == NULL) | |
4429 | return; | |
4430 | ||
4431 | t = p->sysctl; | |
4432 | p->sysctl = NULL; | |
4433 | unregister_sysctl_table(t->sysctl_header); | |
4434 | kfree(t->dev_name); | |
4435 | kfree(t); | |
4436 | } | |
4437 | ||
f52295a9 PE |
4438 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4439 | { | |
54716e3b | 4440 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4441 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4442 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4443 | idev, &idev->cnf); |
f52295a9 PE |
4444 | } |
4445 | ||
408c4768 | 4446 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4447 | { |
408c4768 PE |
4448 | __addrconf_sysctl_unregister(&idev->cnf); |
4449 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4450 | } |
4451 | ||
4452 | ||
4453 | #endif | |
4454 | ||
2c8c1e72 | 4455 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4456 | { |
4457 | int err; | |
4458 | struct ipv6_devconf *all, *dflt; | |
4459 | ||
4460 | err = -ENOMEM; | |
4461 | all = &ipv6_devconf; | |
4462 | dflt = &ipv6_devconf_dflt; | |
4463 | ||
09ad9bc7 | 4464 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4465 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4466 | if (all == NULL) | |
4467 | goto err_alloc_all; | |
4468 | ||
4469 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4470 | if (dflt == NULL) | |
4471 | goto err_alloc_dflt; | |
56d417b1 BH |
4472 | } else { |
4473 | /* these will be inherited by all namespaces */ | |
4474 | dflt->autoconf = ipv6_defaults.autoconf; | |
4475 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4476 | } |
4477 | ||
4478 | net->ipv6.devconf_all = all; | |
4479 | net->ipv6.devconf_dflt = dflt; | |
4480 | ||
4481 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4482 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4483 | if (err < 0) |
4484 | goto err_reg_all; | |
4485 | ||
f8572d8f | 4486 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4487 | if (err < 0) |
4488 | goto err_reg_dflt; | |
4489 | #endif | |
4490 | return 0; | |
4491 | ||
4492 | #ifdef CONFIG_SYSCTL | |
4493 | err_reg_dflt: | |
4494 | __addrconf_sysctl_unregister(all); | |
4495 | err_reg_all: | |
4496 | kfree(dflt); | |
4497 | #endif | |
4498 | err_alloc_dflt: | |
4499 | kfree(all); | |
4500 | err_alloc_all: | |
4501 | return err; | |
4502 | } | |
4503 | ||
2c8c1e72 | 4504 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4505 | { |
4506 | #ifdef CONFIG_SYSCTL | |
4507 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4508 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4509 | #endif | |
09ad9bc7 | 4510 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4511 | kfree(net->ipv6.devconf_dflt); |
4512 | kfree(net->ipv6.devconf_all); | |
4513 | } | |
4514 | } | |
4515 | ||
4516 | static struct pernet_operations addrconf_ops = { | |
4517 | .init = addrconf_init_net, | |
4518 | .exit = addrconf_exit_net, | |
4519 | }; | |
4520 | ||
1da177e4 LT |
4521 | /* |
4522 | * Device notifier | |
4523 | */ | |
4524 | ||
4525 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4526 | { | |
1ab1457c | 4527 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4528 | } |
7159039a YH |
4529 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4530 | ||
1da177e4 LT |
4531 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4532 | { | |
e21e8467 | 4533 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4534 | } |
7159039a YH |
4535 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4536 | ||
1da177e4 LT |
4537 | /* |
4538 | * Init / cleanup code | |
4539 | */ | |
4540 | ||
4541 | int __init addrconf_init(void) | |
4542 | { | |
c2e21293 | 4543 | int i, err; |
2a8cc6c8 | 4544 | |
e21e8467 SH |
4545 | err = ipv6_addr_label_init(); |
4546 | if (err < 0) { | |
4547 | printk(KERN_CRIT "IPv6 Addrconf:" | |
4548 | " cannot initialize default policy table: %d.\n", err); | |
2a8cc6c8 YH |
4549 | return err; |
4550 | } | |
1da177e4 | 4551 | |
e0da5a48 PE |
4552 | register_pernet_subsys(&addrconf_ops); |
4553 | ||
1da177e4 LT |
4554 | /* The addrconf netdev notifier requires that loopback_dev |
4555 | * has it's ipv6 private information allocated and setup | |
4556 | * before it can bring up and give link-local addresses | |
4557 | * to other devices which are up. | |
4558 | * | |
4559 | * Unfortunately, loopback_dev is not necessarily the first | |
4560 | * entry in the global dev_base list of net devices. In fact, | |
4561 | * it is likely to be the very last entry on that list. | |
4562 | * So this causes the notifier registry below to try and | |
4563 | * give link-local addresses to all devices besides loopback_dev | |
4564 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4565 | * devices to fail to get a link-local address. | |
4566 | * | |
4567 | * So, as a temporary fix, allocate the ipv6 structure for | |
4568 | * loopback_dev first by hand. | |
4569 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4570 | * device and it being up should be removed. | |
4571 | */ | |
4572 | rtnl_lock(); | |
2774c7ab | 4573 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4574 | err = -ENOMEM; |
4575 | rtnl_unlock(); | |
4576 | if (err) | |
e0da5a48 | 4577 | goto errlo; |
1da177e4 | 4578 | |
c2e21293 | 4579 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4580 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4581 | ||
1da177e4 LT |
4582 | register_netdevice_notifier(&ipv6_dev_notf); |
4583 | ||
1da177e4 | 4584 | addrconf_verify(0); |
c127ea2c TG |
4585 | |
4586 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4587 | if (err < 0) | |
4588 | goto errout; | |
4589 | ||
4590 | /* Only the first call to __rtnl_register can fail */ | |
4591 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4592 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4593 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4594 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4595 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4596 | ||
2a8cc6c8 YH |
4597 | ipv6_addr_label_rtnl_register(); |
4598 | ||
1da177e4 | 4599 | return 0; |
c127ea2c TG |
4600 | errout: |
4601 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4602 | errlo: |
4603 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4604 | |
4605 | return err; | |
1da177e4 LT |
4606 | } |
4607 | ||
09f7709f | 4608 | void addrconf_cleanup(void) |
1da177e4 | 4609 | { |
176c39af | 4610 | struct net_device *dev; |
1da177e4 LT |
4611 | int i; |
4612 | ||
4613 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4614 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4615 | |
4616 | rtnl_lock(); | |
4617 | ||
176c39af DL |
4618 | /* clean dev list */ |
4619 | for_each_netdev(&init_net, dev) { | |
4620 | if (__in6_dev_get(dev) == NULL) | |
4621 | continue; | |
4622 | addrconf_ifdown(dev, 1); | |
4623 | } | |
4624 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4625 | ||
1da177e4 LT |
4626 | /* |
4627 | * Check hash table. | |
4628 | */ | |
5c578aed | 4629 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4630 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4631 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4632 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4633 | |
4634 | del_timer(&addr_chk_timer); | |
1da177e4 | 4635 | rtnl_unlock(); |
1da177e4 | 4636 | } |