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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/types.h> | |
a0bffffc | 43 | #include <linux/kernel.h> |
1da177e4 LT |
44 | #include <linux/socket.h> |
45 | #include <linux/sockios.h> | |
1da177e4 LT |
46 | #include <linux/net.h> |
47 | #include <linux/in6.h> | |
48 | #include <linux/netdevice.h> | |
1823730f | 49 | #include <linux/if_addr.h> |
1da177e4 LT |
50 | #include <linux/if_arp.h> |
51 | #include <linux/if_arcnet.h> | |
52 | #include <linux/if_infiniband.h> | |
53 | #include <linux/route.h> | |
54 | #include <linux/inetdevice.h> | |
55 | #include <linux/init.h> | |
5a0e3ad6 | 56 | #include <linux/slab.h> |
1da177e4 LT |
57 | #ifdef CONFIG_SYSCTL |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 | 64 | |
457c4cbc | 65 | #include <net/net_namespace.h> |
1da177e4 LT |
66 | #include <net/sock.h> |
67 | #include <net/snmp.h> | |
68 | ||
69 | #include <net/ipv6.h> | |
70 | #include <net/protocol.h> | |
71 | #include <net/ndisc.h> | |
72 | #include <net/ip6_route.h> | |
73 | #include <net/addrconf.h> | |
74 | #include <net/tcp.h> | |
75 | #include <net/ip.h> | |
5d620266 | 76 | #include <net/netlink.h> |
f24e3d65 | 77 | #include <net/pkt_sched.h> |
1da177e4 LT |
78 | #include <linux/if_tunnel.h> |
79 | #include <linux/rtnetlink.h> | |
80 | ||
81 | #ifdef CONFIG_IPV6_PRIVACY | |
82 | #include <linux/random.h> | |
1da177e4 LT |
83 | #endif |
84 | ||
e21e8467 | 85 | #include <linux/uaccess.h> |
7f7d9a6b | 86 | #include <asm/unaligned.h> |
1da177e4 LT |
87 | |
88 | #include <linux/proc_fs.h> | |
89 | #include <linux/seq_file.h> | |
90 | ||
91 | /* Set to 3 to get tracing... */ | |
92 | #define ACONF_DEBUG 2 | |
93 | ||
94 | #if ACONF_DEBUG >= 3 | |
95 | #define ADBG(x) printk x | |
96 | #else | |
97 | #define ADBG(x) | |
98 | #endif | |
99 | ||
100 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
e21e8467 | 101 | #define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b))) |
1da177e4 | 102 | |
b2db7564 YH |
103 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1) |
104 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) | |
105 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) | |
106 | ||
1da177e4 | 107 | #ifdef CONFIG_SYSCTL |
f52295a9 | 108 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
109 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
110 | #else | |
111 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
112 | { | |
113 | } | |
114 | ||
115 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
116 | { | |
117 | } | |
1da177e4 LT |
118 | #endif |
119 | ||
120 | #ifdef CONFIG_IPV6_PRIVACY | |
121 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 122 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
123 | static void ipv6_regen_rndid(unsigned long data); |
124 | ||
125 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
126 | #endif |
127 | ||
1b34be74 | 128 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
129 | static int ipv6_count_addresses(struct inet6_dev *idev); |
130 | ||
131 | /* | |
132 | * Configured unicast address hash table | |
133 | */ | |
c2e21293 | 134 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 135 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 136 | |
1da177e4 LT |
137 | static void addrconf_verify(unsigned long); |
138 | ||
8d06afab | 139 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
140 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
141 | ||
142 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
143 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
144 | ||
93d9b7d7 JP |
145 | static void addrconf_type_change(struct net_device *dev, |
146 | unsigned long event); | |
1da177e4 LT |
147 | static int addrconf_ifdown(struct net_device *dev, int how); |
148 | ||
e431b8c0 | 149 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
150 | static void addrconf_dad_timer(unsigned long data); |
151 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 152 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
153 | static void addrconf_rs_timer(unsigned long data); |
154 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
155 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
156 | ||
1ab1457c | 157 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 158 | struct prefix_info *pinfo); |
3e81c6da DM |
159 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
160 | struct net_device *dev); | |
1da177e4 | 161 | |
e041c683 | 162 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 163 | |
888c848e | 164 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
165 | .forwarding = 0, |
166 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
167 | .mtu6 = IPV6_MIN_MTU, | |
168 | .accept_ra = 1, | |
169 | .accept_redirects = 1, | |
170 | .autoconf = 1, | |
171 | .force_mld_version = 0, | |
172 | .dad_transmits = 1, | |
173 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
174 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
175 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
176 | #ifdef CONFIG_IPV6_PRIVACY | |
177 | .use_tempaddr = 0, | |
178 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
179 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
180 | .regen_max_retry = REGEN_MAX_RETRY, | |
181 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
182 | #endif | |
183 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 184 | .accept_ra_defrtr = 1, |
c4fd30eb | 185 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
186 | #ifdef CONFIG_IPV6_ROUTER_PREF |
187 | .accept_ra_rtr_pref = 1, | |
52e16356 | 188 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
189 | #ifdef CONFIG_IPV6_ROUTE_INFO |
190 | .accept_ra_rt_info_max_plen = 0, | |
191 | #endif | |
930d6ff2 | 192 | #endif |
fbea49e1 | 193 | .proxy_ndp = 0, |
0bcbc926 | 194 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 195 | .disable_ipv6 = 0, |
1b34be74 | 196 | .accept_dad = 1, |
1da177e4 LT |
197 | }; |
198 | ||
ab32ea5d | 199 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
200 | .forwarding = 0, |
201 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
202 | .mtu6 = IPV6_MIN_MTU, | |
203 | .accept_ra = 1, | |
204 | .accept_redirects = 1, | |
205 | .autoconf = 1, | |
206 | .dad_transmits = 1, | |
207 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
208 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
209 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
210 | #ifdef CONFIG_IPV6_PRIVACY | |
211 | .use_tempaddr = 0, | |
212 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
213 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
214 | .regen_max_retry = REGEN_MAX_RETRY, | |
215 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
216 | #endif | |
217 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 218 | .accept_ra_defrtr = 1, |
c4fd30eb | 219 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
220 | #ifdef CONFIG_IPV6_ROUTER_PREF |
221 | .accept_ra_rtr_pref = 1, | |
52e16356 | 222 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
223 | #ifdef CONFIG_IPV6_ROUTE_INFO |
224 | .accept_ra_rt_info_max_plen = 0, | |
225 | #endif | |
930d6ff2 | 226 | #endif |
fbea49e1 | 227 | .proxy_ndp = 0, |
0bcbc926 | 228 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 229 | .disable_ipv6 = 0, |
1b34be74 | 230 | .accept_dad = 1, |
1da177e4 LT |
231 | }; |
232 | ||
233 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 234 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 235 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
236 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
237 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 238 | |
f24e3d65 | 239 | /* Check if a valid qdisc is available */ |
05297949 | 240 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 241 | { |
05297949 | 242 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
243 | } |
244 | ||
2b5ead46 YH |
245 | /* Check if a route is valid prefix route */ |
246 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
247 | { | |
248 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); | |
249 | } | |
250 | ||
1da177e4 LT |
251 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
252 | { | |
253 | if (del_timer(&ifp->timer)) | |
254 | __in6_ifa_put(ifp); | |
255 | } | |
256 | ||
e21e8467 | 257 | enum addrconf_timer_t { |
1da177e4 LT |
258 | AC_NONE, |
259 | AC_DAD, | |
260 | AC_RS, | |
261 | }; | |
262 | ||
263 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
264 | enum addrconf_timer_t what, | |
265 | unsigned long when) | |
266 | { | |
267 | if (!del_timer(&ifp->timer)) | |
268 | in6_ifa_hold(ifp); | |
269 | ||
270 | switch (what) { | |
271 | case AC_DAD: | |
272 | ifp->timer.function = addrconf_dad_timer; | |
273 | break; | |
274 | case AC_RS: | |
275 | ifp->timer.function = addrconf_rs_timer; | |
276 | break; | |
e21e8467 SH |
277 | default: |
278 | break; | |
1da177e4 LT |
279 | } |
280 | ifp->timer.expires = jiffies + when; | |
281 | add_timer(&ifp->timer); | |
282 | } | |
283 | ||
7f7d9a6b HX |
284 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
285 | { | |
7d720c3e | 286 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
c69bce20 | 287 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b | 288 | goto err_ip; |
7d720c3e | 289 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6, |
c69bce20 | 290 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 291 | goto err_icmp; |
7d720c3e | 292 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg, |
c69bce20 | 293 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 294 | goto err_icmpmsg; |
7f7d9a6b HX |
295 | |
296 | return 0; | |
297 | ||
14878f75 | 298 | err_icmpmsg: |
7d720c3e | 299 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); |
7f7d9a6b | 300 | err_icmp: |
7d720c3e | 301 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 302 | err_ip: |
aaf70ec7 | 303 | return -ENOMEM; |
7f7d9a6b HX |
304 | } |
305 | ||
16910b98 | 306 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 307 | { |
7d720c3e TH |
308 | snmp_mib_free((void __percpu **)idev->stats.icmpv6msg); |
309 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); | |
310 | snmp_mib_free((void __percpu **)idev->stats.ipv6); | |
7f7d9a6b HX |
311 | } |
312 | ||
1da177e4 LT |
313 | /* Nobody refers to this device, we may destroy it. */ |
314 | ||
8814c4b5 YH |
315 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
316 | { | |
317 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
318 | kfree(idev); | |
319 | } | |
320 | ||
1da177e4 LT |
321 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
322 | { | |
323 | struct net_device *dev = idev->dev; | |
547b792c | 324 | |
502a2ffd | 325 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c IJ |
326 | WARN_ON(idev->mc_list != NULL); |
327 | ||
1da177e4 LT |
328 | #ifdef NET_REFCNT_DEBUG |
329 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
330 | #endif | |
331 | dev_put(dev); | |
332 | if (!idev->dead) { | |
e21e8467 | 333 | pr_warning("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
334 | return; |
335 | } | |
336 | snmp6_free_dev(idev); | |
8814c4b5 | 337 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
338 | } |
339 | ||
7159039a YH |
340 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
341 | ||
1da177e4 LT |
342 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
343 | { | |
344 | struct inet6_dev *ndev; | |
345 | ||
346 | ASSERT_RTNL(); | |
347 | ||
348 | if (dev->mtu < IPV6_MIN_MTU) | |
349 | return NULL; | |
350 | ||
1ab1457c | 351 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 352 | |
1ab1457c YH |
353 | if (ndev == NULL) |
354 | return NULL; | |
322f74a4 IO |
355 | |
356 | rwlock_init(&ndev->lock); | |
357 | ndev->dev = dev; | |
502a2ffd | 358 | INIT_LIST_HEAD(&ndev->addr_list); |
359 | ||
c346dca1 | 360 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
361 | ndev->cnf.mtu6 = dev->mtu; |
362 | ndev->cnf.sysctl = NULL; | |
363 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
364 | if (ndev->nd_parms == NULL) { | |
365 | kfree(ndev); | |
366 | return NULL; | |
367 | } | |
0187bdfb BH |
368 | if (ndev->cnf.forwarding) |
369 | dev_disable_lro(dev); | |
322f74a4 IO |
370 | /* We refer to the device */ |
371 | dev_hold(dev); | |
1da177e4 | 372 | |
322f74a4 IO |
373 | if (snmp6_alloc_dev(ndev) < 0) { |
374 | ADBG((KERN_WARNING | |
375 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 376 | __func__, dev->name)); |
322f74a4 IO |
377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
378 | ndev->dead = 1; | |
379 | in6_dev_finish_destroy(ndev); | |
380 | return NULL; | |
381 | } | |
1da177e4 | 382 | |
322f74a4 IO |
383 | if (snmp6_register_dev(ndev) < 0) { |
384 | ADBG((KERN_WARNING | |
385 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 386 | __func__, dev->name)); |
322f74a4 IO |
387 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
388 | ndev->dead = 1; | |
389 | in6_dev_finish_destroy(ndev); | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | /* One reference from device. We must do this before | |
394 | * we invoke __ipv6_regen_rndid(). | |
395 | */ | |
396 | in6_dev_hold(ndev); | |
1da177e4 | 397 | |
1b34be74 YH |
398 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
399 | ndev->cnf.accept_dad = -1; | |
400 | ||
b077d7ab YH |
401 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
402 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
403 | printk(KERN_INFO | |
404 | "%s: Disabled Multicast RS\n", | |
405 | dev->name); | |
406 | ndev->cnf.rtr_solicits = 0; | |
407 | } | |
408 | #endif | |
409 | ||
1da177e4 | 410 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 411 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 412 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
413 | if ((dev->flags&IFF_LOOPBACK) || |
414 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 415 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 416 | dev->type == ARPHRD_SIT || |
0be669bb | 417 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
418 | printk(KERN_INFO |
419 | "%s: Disabled Privacy Extensions\n", | |
420 | dev->name); | |
421 | ndev->cnf.use_tempaddr = -1; | |
422 | } else { | |
423 | in6_dev_hold(ndev); | |
424 | ipv6_regen_rndid((unsigned long) ndev); | |
425 | } | |
1da177e4 LT |
426 | #endif |
427 | ||
f24e3d65 | 428 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
429 | ndev->if_flags |= IF_READY; |
430 | ||
322f74a4 IO |
431 | ipv6_mc_init_dev(ndev); |
432 | ndev->tstamp = jiffies; | |
f52295a9 | 433 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
434 | /* protected by rtnl_lock */ |
435 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
436 | |
437 | /* Join all-node multicast group */ | |
f3ee4010 | 438 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 439 | |
1da177e4 LT |
440 | return ndev; |
441 | } | |
442 | ||
cee89473 | 443 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
444 | { |
445 | struct inet6_dev *idev; | |
446 | ||
447 | ASSERT_RTNL(); | |
448 | ||
e21e8467 SH |
449 | idev = __in6_dev_get(dev); |
450 | if (!idev) { | |
451 | idev = ipv6_add_dev(dev); | |
452 | if (!idev) | |
1da177e4 LT |
453 | return NULL; |
454 | } | |
c5e33bdd | 455 | |
1da177e4 LT |
456 | if (dev->flags&IFF_UP) |
457 | ipv6_mc_up(idev); | |
458 | return idev; | |
459 | } | |
460 | ||
461 | #ifdef CONFIG_SYSCTL | |
462 | static void dev_forward_change(struct inet6_dev *idev) | |
463 | { | |
464 | struct net_device *dev; | |
465 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
466 | |
467 | if (!idev) | |
468 | return; | |
469 | dev = idev->dev; | |
0187bdfb BH |
470 | if (idev->cnf.forwarding) |
471 | dev_disable_lro(dev); | |
1da177e4 | 472 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 473 | if (idev->cnf.forwarding) |
f3ee4010 | 474 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 475 | else |
f3ee4010 | 476 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 477 | } |
502a2ffd | 478 | |
479 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
480 | if (ifa->flags&IFA_F_TENTATIVE) |
481 | continue; | |
1da177e4 LT |
482 | if (idev->cnf.forwarding) |
483 | addrconf_join_anycast(ifa); | |
484 | else | |
485 | addrconf_leave_anycast(ifa); | |
486 | } | |
487 | } | |
488 | ||
489 | ||
e186932b | 490 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
491 | { |
492 | struct net_device *dev; | |
493 | struct inet6_dev *idev; | |
494 | ||
c6d14c84 ED |
495 | rcu_read_lock(); |
496 | for_each_netdev_rcu(net, dev) { | |
1da177e4 LT |
497 | idev = __in6_dev_get(dev); |
498 | if (idev) { | |
e186932b PE |
499 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
500 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
501 | if (changed) |
502 | dev_forward_change(idev); | |
503 | } | |
1da177e4 | 504 | } |
c6d14c84 | 505 | rcu_read_unlock(); |
1da177e4 | 506 | } |
c8fecf22 | 507 | |
b325fddb | 508 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf22 | 509 | { |
bff16c2f PE |
510 | struct net *net; |
511 | ||
512 | net = (struct net *)table->extra2; | |
441fc2a2 | 513 | if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb SH |
514 | return 0; |
515 | ||
88af182e EB |
516 | if (!rtnl_trylock()) { |
517 | /* Restore the original values before restarting */ | |
518 | *p = old; | |
5007392d | 519 | return restart_syscall(); |
88af182e | 520 | } |
c8fecf22 | 521 | |
e186932b PE |
522 | if (p == &net->ipv6.devconf_all->forwarding) { |
523 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
524 | net->ipv6.devconf_dflt->forwarding = newf; | |
525 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
526 | } else if ((!*p) ^ (!old)) |
527 | dev_forward_change((struct inet6_dev *)table->extra1); | |
0187bdfb | 528 | rtnl_unlock(); |
c8fecf22 PE |
529 | |
530 | if (*p) | |
7b4da532 | 531 | rt6_purge_dflt_routers(net); |
b325fddb | 532 | return 1; |
c8fecf22 | 533 | } |
1da177e4 LT |
534 | #endif |
535 | ||
5c578aed | 536 | static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head) |
537 | { | |
538 | struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu); | |
539 | kfree(ifp); | |
540 | } | |
1da177e4 | 541 | |
5c578aed | 542 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
543 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
544 | { | |
c2e21293 | 545 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 546 | |
1da177e4 LT |
547 | #ifdef NET_REFCNT_DEBUG |
548 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
549 | #endif | |
550 | ||
551 | in6_dev_put(ifp->idev); | |
552 | ||
553 | if (del_timer(&ifp->timer)) | |
e21e8467 | 554 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 LT |
555 | |
556 | if (!ifp->dead) { | |
e21e8467 | 557 | pr_warning("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
558 | return; |
559 | } | |
560 | dst_release(&ifp->rt->u.dst); | |
561 | ||
5c578aed | 562 | call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu); |
1da177e4 LT |
563 | } |
564 | ||
e55ffac6 BH |
565 | static void |
566 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
567 | { | |
502a2ffd | 568 | struct list_head *p; |
8a6ce0c0 | 569 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
570 | |
571 | /* | |
572 | * Each device address list is sorted in order of scope - | |
573 | * global before linklocal. | |
574 | */ | |
502a2ffd | 575 | list_for_each(p, &idev->addr_list) { |
576 | struct inet6_ifaddr *ifa | |
577 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 578 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
579 | break; |
580 | } | |
581 | ||
b54c9b98 | 582 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
583 | } |
584 | ||
3a88a81d | 585 | static u32 ipv6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 586 | { |
3eb84f49 YH |
587 | /* |
588 | * We perform the hash function over the last 64 bits of the address | |
589 | * This will include the IEEE address token on links that support it. | |
590 | */ | |
3a88a81d | 591 | return jhash_2words(addr->s6_addr32[2], addr->s6_addr32[3], 0) |
592 | & (IN6_ADDR_HSIZE - 1); | |
3eb84f49 YH |
593 | } |
594 | ||
1da177e4 LT |
595 | /* On success it returns ifp with increased reference count */ |
596 | ||
597 | static struct inet6_ifaddr * | |
598 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 599 | int scope, u32 flags) |
1da177e4 LT |
600 | { |
601 | struct inet6_ifaddr *ifa = NULL; | |
602 | struct rt6_info *rt; | |
3a88a81d | 603 | unsigned int hash; |
1da177e4 | 604 | int err = 0; |
d68b8270 YH |
605 | int addr_type = ipv6_addr_type(addr); |
606 | ||
607 | if (addr_type == IPV6_ADDR_ANY || | |
608 | addr_type & IPV6_ADDR_MULTICAST || | |
609 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
610 | addr_type & IPV6_ADDR_LOOPBACK)) | |
611 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 612 | |
8814c4b5 | 613 | rcu_read_lock_bh(); |
1da177e4 LT |
614 | if (idev->dead) { |
615 | err = -ENODEV; /*XXX*/ | |
616 | goto out2; | |
617 | } | |
618 | ||
56d417b1 | 619 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
620 | err = -EACCES; |
621 | goto out2; | |
622 | } | |
623 | ||
5c578aed | 624 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
625 | |
626 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 627 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
628 | ADBG(("ipv6_add_addr: already assigned\n")); |
629 | err = -EEXIST; | |
630 | goto out; | |
631 | } | |
632 | ||
322f74a4 | 633 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
634 | |
635 | if (ifa == NULL) { | |
636 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
637 | err = -ENOBUFS; | |
638 | goto out; | |
639 | } | |
640 | ||
641 | rt = addrconf_dst_alloc(idev, addr, 0); | |
642 | if (IS_ERR(rt)) { | |
643 | err = PTR_ERR(rt); | |
644 | goto out; | |
645 | } | |
646 | ||
1da177e4 LT |
647 | ipv6_addr_copy(&ifa->addr, addr); |
648 | ||
649 | spin_lock_init(&ifa->lock); | |
650 | init_timer(&ifa->timer); | |
c2e21293 | 651 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
652 | ifa->timer.data = (unsigned long) ifa; |
653 | ifa->scope = scope; | |
654 | ifa->prefix_len = pfxlen; | |
655 | ifa->flags = flags | IFA_F_TENTATIVE; | |
656 | ifa->cstamp = ifa->tstamp = jiffies; | |
657 | ||
57f5f544 KF |
658 | ifa->rt = rt; |
659 | ||
95c385b4 NH |
660 | /* |
661 | * part one of RFC 4429, section 3.3 | |
662 | * We should not configure an address as | |
663 | * optimistic if we do not yet know the link | |
664 | * layer address of our nexhop router | |
665 | */ | |
666 | ||
667 | if (rt->rt6i_nexthop == NULL) | |
668 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
669 | ||
1da177e4 LT |
670 | ifa->idev = idev; |
671 | in6_dev_hold(idev); | |
672 | /* For caller */ | |
673 | in6_ifa_hold(ifa); | |
674 | ||
675 | /* Add to big hash table */ | |
676 | hash = ipv6_addr_hash(addr); | |
677 | ||
5c578aed | 678 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 679 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
680 | |
681 | write_lock(&idev->lock); | |
682 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 683 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
684 | |
685 | #ifdef CONFIG_IPV6_PRIVACY | |
686 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 687 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
688 | in6_ifa_hold(ifa); |
689 | } | |
690 | #endif | |
691 | ||
1da177e4 LT |
692 | in6_ifa_hold(ifa); |
693 | write_unlock(&idev->lock); | |
694 | out2: | |
8814c4b5 | 695 | rcu_read_unlock_bh(); |
1da177e4 | 696 | |
fd92833a | 697 | if (likely(err == 0)) |
e041c683 | 698 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
699 | else { |
700 | kfree(ifa); | |
701 | ifa = ERR_PTR(err); | |
702 | } | |
703 | ||
704 | return ifa; | |
705 | out: | |
5c578aed | 706 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
707 | goto out2; |
708 | } | |
709 | ||
710 | /* This function wants to get referenced ifp and releases it before return */ | |
711 | ||
712 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
713 | { | |
502a2ffd | 714 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 LT |
715 | struct inet6_dev *idev = ifp->idev; |
716 | int hash; | |
717 | int deleted = 0, onlink = 0; | |
718 | unsigned long expires = jiffies; | |
719 | ||
720 | hash = ipv6_addr_hash(&ifp->addr); | |
721 | ||
722 | ifp->dead = 1; | |
723 | ||
5c578aed | 724 | spin_lock_bh(&addrconf_hash_lock); |
725 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 726 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
727 | |
728 | write_lock_bh(&idev->lock); | |
729 | #ifdef CONFIG_IPV6_PRIVACY | |
730 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 731 | list_del(&ifp->tmp_list); |
732 | if (ifp->ifpub) { | |
733 | in6_ifa_put(ifp->ifpub); | |
734 | ifp->ifpub = NULL; | |
1da177e4 | 735 | } |
372e6c8f | 736 | __in6_ifa_put(ifp); |
1da177e4 LT |
737 | } |
738 | #endif | |
739 | ||
502a2ffd | 740 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 741 | if (ifa == ifp) { |
502a2ffd | 742 | list_del_init(&ifp->if_list); |
1da177e4 | 743 | __in6_ifa_put(ifp); |
502a2ffd | 744 | |
1da177e4 LT |
745 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
746 | break; | |
747 | deleted = 1; | |
1d142804 | 748 | continue; |
1da177e4 LT |
749 | } else if (ifp->flags & IFA_F_PERMANENT) { |
750 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
751 | ifp->prefix_len)) { | |
752 | if (ifa->flags & IFA_F_PERMANENT) { | |
753 | onlink = 1; | |
754 | if (deleted) | |
755 | break; | |
756 | } else { | |
757 | unsigned long lifetime; | |
758 | ||
759 | if (!onlink) | |
760 | onlink = -1; | |
761 | ||
762 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
763 | |
764 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
765 | /* | |
766 | * Note: Because this address is | |
767 | * not permanent, lifetime < | |
768 | * LONG_MAX / HZ here. | |
769 | */ | |
1da177e4 LT |
770 | if (time_before(expires, |
771 | ifa->tstamp + lifetime * HZ)) | |
772 | expires = ifa->tstamp + lifetime * HZ; | |
773 | spin_unlock(&ifa->lock); | |
774 | } | |
775 | } | |
776 | } | |
777 | } | |
778 | write_unlock_bh(&idev->lock); | |
779 | ||
b2238566 AV |
780 | addrconf_del_timer(ifp); |
781 | ||
1da177e4 LT |
782 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
783 | ||
e041c683 | 784 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 785 | |
1da177e4 LT |
786 | /* |
787 | * Purge or update corresponding prefix | |
788 | * | |
789 | * 1) we don't purge prefix here if address was not permanent. | |
790 | * prefix is managed by its own lifetime. | |
791 | * 2) if there're no addresses, delete prefix. | |
792 | * 3) if there're still other permanent address(es), | |
793 | * corresponding prefix is still permanent. | |
794 | * 4) otherwise, update prefix lifetime to the | |
795 | * longest valid lifetime among the corresponding | |
796 | * addresses on the device. | |
797 | * Note: subsequent RA will update lifetime. | |
798 | * | |
799 | * --yoshfuji | |
800 | */ | |
801 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
802 | struct in6_addr prefix; | |
803 | struct rt6_info *rt; | |
c346dca1 | 804 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 805 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 806 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 807 | |
2b5ead46 | 808 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 809 | if (onlink == 0) { |
e0a1ad73 | 810 | ip6_del_rt(rt); |
1da177e4 LT |
811 | rt = NULL; |
812 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
813 | rt->rt6i_expires = expires; | |
814 | rt->rt6i_flags |= RTF_EXPIRES; | |
815 | } | |
816 | } | |
817 | dst_release(&rt->u.dst); | |
818 | } | |
819 | ||
820 | in6_ifa_put(ifp); | |
821 | } | |
822 | ||
823 | #ifdef CONFIG_IPV6_PRIVACY | |
824 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
825 | { | |
826 | struct inet6_dev *idev = ifp->idev; | |
827 | struct in6_addr addr, *tmpaddr; | |
828 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 829 | unsigned long regen_advance; |
1da177e4 LT |
830 | int tmp_plen; |
831 | int ret = 0; | |
832 | int max_addresses; | |
95c385b4 | 833 | u32 addr_flags; |
1da177e4 LT |
834 | |
835 | write_lock(&idev->lock); | |
836 | if (ift) { | |
837 | spin_lock_bh(&ift->lock); | |
838 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
839 | spin_unlock_bh(&ift->lock); | |
840 | tmpaddr = &addr; | |
841 | } else { | |
842 | tmpaddr = NULL; | |
843 | } | |
844 | retry: | |
845 | in6_dev_hold(idev); | |
846 | if (idev->cnf.use_tempaddr <= 0) { | |
847 | write_unlock(&idev->lock); | |
848 | printk(KERN_INFO | |
849 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
850 | in6_dev_put(idev); | |
851 | ret = -1; | |
852 | goto out; | |
853 | } | |
854 | spin_lock_bh(&ifp->lock); | |
855 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
856 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
857 | spin_unlock_bh(&ifp->lock); | |
858 | write_unlock(&idev->lock); | |
859 | printk(KERN_WARNING | |
860 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
861 | in6_dev_put(idev); | |
862 | ret = -1; | |
863 | goto out; | |
864 | } | |
865 | in6_ifa_hold(ifp); | |
866 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
867 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
868 | spin_unlock_bh(&ifp->lock); | |
869 | write_unlock(&idev->lock); | |
870 | printk(KERN_WARNING | |
871 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
872 | in6_ifa_put(ifp); | |
873 | in6_dev_put(idev); | |
874 | ret = -1; | |
875 | goto out; | |
876 | } | |
877 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
878 | tmp_valid_lft = min_t(__u32, | |
879 | ifp->valid_lft, | |
880 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
881 | tmp_prefered_lft = min_t(__u32, |
882 | ifp->prefered_lft, | |
1da177e4 LT |
883 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
884 | tmp_plen = ifp->prefix_len; | |
885 | max_addresses = idev->cnf.max_addresses; | |
886 | tmp_cstamp = ifp->cstamp; | |
887 | tmp_tstamp = ifp->tstamp; | |
888 | spin_unlock_bh(&ifp->lock); | |
889 | ||
eac55bf9 BB |
890 | regen_advance = idev->cnf.regen_max_retry * |
891 | idev->cnf.dad_transmits * | |
892 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 893 | write_unlock(&idev->lock); |
95c385b4 | 894 | |
eac55bf9 BB |
895 | /* A temporary address is created only if this calculated Preferred |
896 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
897 | * an implementation must not create a temporary address with a zero | |
898 | * Preferred Lifetime. | |
899 | */ | |
900 | if (tmp_prefered_lft <= regen_advance) { | |
901 | in6_ifa_put(ifp); | |
902 | in6_dev_put(idev); | |
903 | ret = -1; | |
904 | goto out; | |
905 | } | |
906 | ||
95c385b4 NH |
907 | addr_flags = IFA_F_TEMPORARY; |
908 | /* set in addrconf_prefix_rcv() */ | |
909 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
910 | addr_flags |= IFA_F_OPTIMISTIC; | |
911 | ||
1da177e4 | 912 | ift = !max_addresses || |
1ab1457c | 913 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 914 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
915 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
916 | addr_flags) : NULL; | |
1da177e4 LT |
917 | if (!ift || IS_ERR(ift)) { |
918 | in6_ifa_put(ifp); | |
919 | in6_dev_put(idev); | |
920 | printk(KERN_INFO | |
921 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
922 | tmpaddr = &addr; | |
923 | write_lock(&idev->lock); | |
924 | goto retry; | |
925 | } | |
926 | ||
927 | spin_lock_bh(&ift->lock); | |
928 | ift->ifpub = ifp; | |
929 | ift->valid_lft = tmp_valid_lft; | |
930 | ift->prefered_lft = tmp_prefered_lft; | |
931 | ift->cstamp = tmp_cstamp; | |
932 | ift->tstamp = tmp_tstamp; | |
933 | spin_unlock_bh(&ift->lock); | |
934 | ||
935 | addrconf_dad_start(ift, 0); | |
936 | in6_ifa_put(ift); | |
937 | in6_dev_put(idev); | |
938 | out: | |
939 | return ret; | |
940 | } | |
941 | #endif | |
942 | ||
943 | /* | |
072047e4 | 944 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 945 | */ |
a9b05723 YH |
946 | enum { |
947 | IPV6_SADDR_RULE_INIT = 0, | |
948 | IPV6_SADDR_RULE_LOCAL, | |
949 | IPV6_SADDR_RULE_SCOPE, | |
950 | IPV6_SADDR_RULE_PREFERRED, | |
951 | #ifdef CONFIG_IPV6_MIP6 | |
952 | IPV6_SADDR_RULE_HOA, | |
953 | #endif | |
954 | IPV6_SADDR_RULE_OIF, | |
955 | IPV6_SADDR_RULE_LABEL, | |
956 | #ifdef CONFIG_IPV6_PRIVACY | |
957 | IPV6_SADDR_RULE_PRIVACY, | |
958 | #endif | |
959 | IPV6_SADDR_RULE_ORCHID, | |
960 | IPV6_SADDR_RULE_PREFIX, | |
961 | IPV6_SADDR_RULE_MAX | |
962 | }; | |
963 | ||
072047e4 | 964 | struct ipv6_saddr_score { |
a9b05723 YH |
965 | int rule; |
966 | int addr_type; | |
967 | struct inet6_ifaddr *ifa; | |
968 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
969 | int scopedist; | |
970 | int matchlen; | |
072047e4 YH |
971 | }; |
972 | ||
a9b05723 | 973 | struct ipv6_saddr_dst { |
9acd9f3a | 974 | const struct in6_addr *addr; |
a9b05723 YH |
975 | int ifindex; |
976 | int scope; | |
977 | int label; | |
7cbca67c | 978 | unsigned int prefs; |
a9b05723 | 979 | }; |
072047e4 | 980 | |
b6f99a21 | 981 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 982 | { |
45bb0060 | 983 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
984 | return 1; |
985 | return 0; | |
1da177e4 LT |
986 | } |
987 | ||
3de23255 BT |
988 | static int ipv6_get_saddr_eval(struct net *net, |
989 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
990 | struct ipv6_saddr_dst *dst, |
991 | int i) | |
992 | { | |
993 | int ret; | |
994 | ||
995 | if (i <= score->rule) { | |
996 | switch (i) { | |
997 | case IPV6_SADDR_RULE_SCOPE: | |
998 | ret = score->scopedist; | |
999 | break; | |
1000 | case IPV6_SADDR_RULE_PREFIX: | |
1001 | ret = score->matchlen; | |
1002 | break; | |
1003 | default: | |
1004 | ret = !!test_bit(i, score->scorebits); | |
1005 | } | |
1006 | goto out; | |
1007 | } | |
1008 | ||
1009 | switch (i) { | |
1010 | case IPV6_SADDR_RULE_INIT: | |
1011 | /* Rule 0: remember if hiscore is not ready yet */ | |
1012 | ret = !!score->ifa; | |
1013 | break; | |
1014 | case IPV6_SADDR_RULE_LOCAL: | |
1015 | /* Rule 1: Prefer same address */ | |
1016 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1017 | break; | |
1018 | case IPV6_SADDR_RULE_SCOPE: | |
1019 | /* Rule 2: Prefer appropriate scope | |
1020 | * | |
1021 | * ret | |
1022 | * ^ | |
1023 | * -1 | d 15 | |
1024 | * ---+--+-+---> scope | |
1025 | * | | |
1026 | * | d is scope of the destination. | |
1027 | * B-d | \ | |
1028 | * | \ <- smaller scope is better if | |
1029 | * B-15 | \ if scope is enough for destinaion. | |
1030 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1031 | * d-C-1 | / | |
1032 | * |/ <- greater is better | |
1033 | * -C / if scope is not enough for destination. | |
1034 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1035 | * | |
1036 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1037 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1038 | * Assume B = 0 and we get C > 29. | |
1039 | */ | |
1040 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1041 | if (ret >= dst->scope) | |
1042 | ret = -ret; | |
1043 | else | |
1044 | ret -= 128; /* 30 is enough */ | |
1045 | score->scopedist = ret; | |
1046 | break; | |
1047 | case IPV6_SADDR_RULE_PREFERRED: | |
1048 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1049 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1050 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1051 | break; | |
1052 | #ifdef CONFIG_IPV6_MIP6 | |
1053 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1054 | { |
a9b05723 | 1055 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1056 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1057 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1058 | break; |
7cbca67c | 1059 | } |
a9b05723 YH |
1060 | #endif |
1061 | case IPV6_SADDR_RULE_OIF: | |
1062 | /* Rule 5: Prefer outgoing interface */ | |
1063 | ret = (!dst->ifindex || | |
1064 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1065 | break; | |
1066 | case IPV6_SADDR_RULE_LABEL: | |
1067 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1068 | ret = ipv6_addr_label(net, |
1069 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1070 | score->ifa->idev->dev->ifindex) == dst->label; |
1071 | break; | |
1072 | #ifdef CONFIG_IPV6_PRIVACY | |
1073 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1074 | { |
a9b05723 YH |
1075 | /* Rule 7: Prefer public address |
1076 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1077 | */ | |
7cbca67c YH |
1078 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1079 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1080 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1081 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1082 | break; |
7cbca67c | 1083 | } |
a9b05723 YH |
1084 | #endif |
1085 | case IPV6_SADDR_RULE_ORCHID: | |
1086 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1087 | * non-ORCHID vs non-ORCHID | |
1088 | */ | |
1089 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1090 | ipv6_addr_orchid(dst->addr)); | |
1091 | break; | |
1092 | case IPV6_SADDR_RULE_PREFIX: | |
1093 | /* Rule 8: Use longest matching prefix */ | |
1094 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1095 | dst->addr); | |
1096 | break; | |
1097 | default: | |
1098 | ret = 0; | |
1099 | } | |
1100 | ||
1101 | if (ret) | |
1102 | __set_bit(i, score->scorebits); | |
1103 | score->rule = i; | |
1104 | out: | |
1105 | return ret; | |
1106 | } | |
1107 | ||
191cd582 | 1108 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1109 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1110 | struct in6_addr *saddr) |
1da177e4 | 1111 | { |
a9b05723 YH |
1112 | struct ipv6_saddr_score scores[2], |
1113 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1114 | struct ipv6_saddr_dst dst; |
072047e4 | 1115 | struct net_device *dev; |
a9b05723 | 1116 | int dst_type; |
1da177e4 | 1117 | |
a9b05723 YH |
1118 | dst_type = __ipv6_addr_type(daddr); |
1119 | dst.addr = daddr; | |
1120 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1121 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1122 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1123 | dst.prefs = prefs; |
a9b05723 YH |
1124 | |
1125 | hiscore->rule = -1; | |
1126 | hiscore->ifa = NULL; | |
1da177e4 | 1127 | |
8814c4b5 | 1128 | rcu_read_lock(); |
1da177e4 | 1129 | |
c6d14c84 | 1130 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1131 | struct inet6_dev *idev; |
072047e4 | 1132 | |
a9b05723 | 1133 | /* Candidate Source Address (section 4) |
072047e4 YH |
1134 | * - multicast and link-local destination address, |
1135 | * the set of candidate source address MUST only | |
1136 | * include addresses assigned to interfaces | |
1137 | * belonging to the same link as the outgoing | |
1138 | * interface. | |
1139 | * (- For site-local destination addresses, the | |
1140 | * set of candidate source addresses MUST only | |
1141 | * include addresses assigned to interfaces | |
1142 | * belonging to the same site as the outgoing | |
1143 | * interface.) | |
1144 | */ | |
a9b05723 YH |
1145 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1146 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1147 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1148 | continue; |
1da177e4 | 1149 | |
1da177e4 | 1150 | idev = __in6_dev_get(dev); |
072047e4 YH |
1151 | if (!idev) |
1152 | continue; | |
1153 | ||
1154 | read_lock_bh(&idev->lock); | |
502a2ffd | 1155 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1156 | int i; |
072047e4 | 1157 | |
a9b05723 | 1158 | /* |
6b3ae80a YH |
1159 | * - Tentative Address (RFC2462 section 5.4) |
1160 | * - A tentative address is not considered | |
1161 | * "assigned to an interface" in the traditional | |
95c385b4 | 1162 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1163 | * - Candidate Source Address (section 4) |
072047e4 YH |
1164 | * - In any case, anycast addresses, multicast |
1165 | * addresses, and the unspecified address MUST | |
1166 | * NOT be included in a candidate set. | |
1167 | */ | |
a9b05723 YH |
1168 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1169 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1170 | continue; |
a9b05723 YH |
1171 | |
1172 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1173 | ||
1174 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1175 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1176 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1177 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1178 | "assigned as unicast address on %s", |
1179 | dev->name); | |
1180 | continue; | |
1181 | } | |
1182 | ||
a9b05723 YH |
1183 | score->rule = -1; |
1184 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1185 | ||
1186 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1187 | int minihiscore, miniscore; | |
1188 | ||
3de23255 BT |
1189 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1190 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1191 | |
1192 | if (minihiscore > miniscore) { | |
1193 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1194 | score->scopedist > 0) { | |
1195 | /* | |
1196 | * special case: | |
1197 | * each remaining entry | |
1198 | * has too small (not enough) | |
1199 | * scope, because ifa entries | |
1200 | * are sorted by their scope | |
1201 | * values. | |
1202 | */ | |
1203 | goto try_nextdev; | |
1204 | } | |
1205 | break; | |
1206 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1207 | if (hiscore->ifa) |
1208 | in6_ifa_put(hiscore->ifa); | |
1209 | ||
1210 | in6_ifa_hold(score->ifa); | |
1211 | ||
a0bffffc | 1212 | swap(hiscore, score); |
a9b05723 YH |
1213 | |
1214 | /* restore our iterator */ | |
1215 | score->ifa = hiscore->ifa; | |
1216 | ||
1217 | break; | |
1da177e4 | 1218 | } |
072047e4 | 1219 | } |
1da177e4 | 1220 | } |
a9b05723 | 1221 | try_nextdev: |
072047e4 | 1222 | read_unlock_bh(&idev->lock); |
1da177e4 | 1223 | } |
8814c4b5 | 1224 | rcu_read_unlock(); |
1da177e4 | 1225 | |
a9b05723 | 1226 | if (!hiscore->ifa) |
072047e4 | 1227 | return -EADDRNOTAVAIL; |
1ab1457c | 1228 | |
a9b05723 YH |
1229 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1230 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1231 | return 0; |
1da177e4 | 1232 | } |
5e5f3f0f | 1233 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1234 | |
95c385b4 NH |
1235 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1236 | unsigned char banned_flags) | |
1da177e4 LT |
1237 | { |
1238 | struct inet6_dev *idev; | |
1239 | int err = -EADDRNOTAVAIL; | |
1240 | ||
8814c4b5 | 1241 | rcu_read_lock(); |
e21e8467 SH |
1242 | idev = __in6_dev_get(dev); |
1243 | if (idev) { | |
1da177e4 LT |
1244 | struct inet6_ifaddr *ifp; |
1245 | ||
1246 | read_lock_bh(&idev->lock); | |
502a2ffd | 1247 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1248 | if (ifp->scope == IFA_LINK && | |
1249 | !(ifp->flags & banned_flags)) { | |
1da177e4 LT |
1250 | ipv6_addr_copy(addr, &ifp->addr); |
1251 | err = 0; | |
1252 | break; | |
1253 | } | |
1254 | } | |
1255 | read_unlock_bh(&idev->lock); | |
1256 | } | |
8814c4b5 | 1257 | rcu_read_unlock(); |
1da177e4 LT |
1258 | return err; |
1259 | } | |
1260 | ||
1261 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1262 | { | |
1263 | int cnt = 0; | |
1264 | struct inet6_ifaddr *ifp; | |
1265 | ||
1266 | read_lock_bh(&idev->lock); | |
502a2ffd | 1267 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1268 | cnt++; |
1269 | read_unlock_bh(&idev->lock); | |
1270 | return cnt; | |
1271 | } | |
1272 | ||
bfeade08 DL |
1273 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1274 | struct net_device *dev, int strict) | |
1da177e4 | 1275 | { |
c2e21293 | 1276 | struct inet6_ifaddr *ifp = NULL; |
1277 | struct hlist_node *node; | |
3a88a81d | 1278 | unsigned int hash = ipv6_addr_hash(addr); |
1da177e4 | 1279 | |
5c578aed | 1280 | rcu_read_lock_bh(); |
1281 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1282 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1283 | continue; |
1da177e4 LT |
1284 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1285 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1286 | if (dev == NULL || ifp->idev->dev == dev || | |
1287 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1288 | break; | |
1289 | } | |
1290 | } | |
5c578aed | 1291 | rcu_read_unlock_bh(); |
1292 | ||
1da177e4 LT |
1293 | return ifp != NULL; |
1294 | } | |
7159039a YH |
1295 | EXPORT_SYMBOL(ipv6_chk_addr); |
1296 | ||
3e81c6da DM |
1297 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1298 | struct net_device *dev) | |
1da177e4 | 1299 | { |
3e81c6da | 1300 | unsigned int hash = ipv6_addr_hash(addr); |
c2e21293 | 1301 | struct inet6_ifaddr *ifp; |
1302 | struct hlist_node *node; | |
1da177e4 | 1303 | |
c2e21293 | 1304 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1305 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1306 | continue; |
1da177e4 LT |
1307 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1308 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1309 | return true; |
1da177e4 LT |
1310 | } |
1311 | } | |
3e81c6da | 1312 | return false; |
1da177e4 LT |
1313 | } |
1314 | ||
52eeeb84 YH |
1315 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1316 | { | |
1317 | struct inet6_dev *idev; | |
1318 | struct inet6_ifaddr *ifa; | |
1319 | int onlink; | |
1320 | ||
1321 | onlink = 0; | |
1322 | rcu_read_lock(); | |
1323 | idev = __in6_dev_get(dev); | |
1324 | if (idev) { | |
1325 | read_lock_bh(&idev->lock); | |
502a2ffd | 1326 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1327 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1328 | ifa->prefix_len); | |
1329 | if (onlink) | |
1330 | break; | |
1331 | } | |
1332 | read_unlock_bh(&idev->lock); | |
1333 | } | |
1334 | rcu_read_unlock(); | |
1335 | return onlink; | |
1336 | } | |
1337 | ||
1338 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1339 | ||
9acd9f3a | 1340 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1341 | struct net_device *dev, int strict) |
1da177e4 | 1342 | { |
b79d1d54 | 1343 | struct inet6_ifaddr *ifp, *result = NULL; |
3a88a81d | 1344 | unsigned int hash = ipv6_addr_hash(addr); |
b79d1d54 | 1345 | struct hlist_node *node; |
1da177e4 | 1346 | |
5c578aed | 1347 | rcu_read_lock_bh(); |
1348 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1349 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1350 | continue; |
1da177e4 LT |
1351 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1352 | if (dev == NULL || ifp->idev->dev == dev || | |
1353 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1354 | result = ifp; |
1da177e4 LT |
1355 | in6_ifa_hold(ifp); |
1356 | break; | |
1357 | } | |
1358 | } | |
1359 | } | |
5c578aed | 1360 | rcu_read_unlock_bh(); |
1da177e4 | 1361 | |
b79d1d54 | 1362 | return result; |
1da177e4 LT |
1363 | } |
1364 | ||
1da177e4 LT |
1365 | /* Gets referenced address, destroys ifaddr */ |
1366 | ||
cc411d0b | 1367 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1368 | { |
1da177e4 LT |
1369 | if (ifp->flags&IFA_F_PERMANENT) { |
1370 | spin_lock_bh(&ifp->lock); | |
1371 | addrconf_del_timer(ifp); | |
1372 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1373 | if (dad_failed) |
1374 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1375 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1376 | if (dad_failed) |
1377 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1378 | in6_ifa_put(ifp); |
1379 | #ifdef CONFIG_IPV6_PRIVACY | |
1380 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1381 | struct inet6_ifaddr *ifpub; | |
1382 | spin_lock_bh(&ifp->lock); | |
1383 | ifpub = ifp->ifpub; | |
1384 | if (ifpub) { | |
1385 | in6_ifa_hold(ifpub); | |
1386 | spin_unlock_bh(&ifp->lock); | |
1387 | ipv6_create_tempaddr(ifpub, ifp); | |
1388 | in6_ifa_put(ifpub); | |
1389 | } else { | |
1390 | spin_unlock_bh(&ifp->lock); | |
1391 | } | |
1392 | ipv6_del_addr(ifp); | |
1393 | #endif | |
1394 | } else | |
1395 | ipv6_del_addr(ifp); | |
1396 | } | |
1397 | ||
3c21edbd YH |
1398 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1399 | { | |
1b34be74 | 1400 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 BH |
1401 | |
1402 | if (net_ratelimit()) | |
0522fea6 JR |
1403 | printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |
1404 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1405 | |
1b34be74 YH |
1406 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1407 | struct in6_addr addr; | |
1408 | ||
1409 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1410 | addr.s6_addr32[1] = 0; | |
1411 | ||
1412 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1413 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1414 | /* DAD failed for link-local based on MAC address */ | |
1415 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 BH |
1416 | |
1417 | printk(KERN_INFO "%s: IPv6 being disabled!\n", | |
1418 | ifp->idev->dev->name); | |
1b34be74 YH |
1419 | } |
1420 | } | |
1421 | ||
cc411d0b | 1422 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1423 | } |
1da177e4 LT |
1424 | |
1425 | /* Join to solicited addr multicast group. */ | |
1426 | ||
1427 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1428 | { | |
1429 | struct in6_addr maddr; | |
1430 | ||
1431 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1432 | return; | |
1433 | ||
1434 | addrconf_addr_solict_mult(addr, &maddr); | |
1435 | ipv6_dev_mc_inc(dev, &maddr); | |
1436 | } | |
1437 | ||
1438 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1439 | { | |
1440 | struct in6_addr maddr; | |
1441 | ||
1442 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1443 | return; | |
1444 | ||
1445 | addrconf_addr_solict_mult(addr, &maddr); | |
1446 | __ipv6_dev_mc_dec(idev, &maddr); | |
1447 | } | |
1448 | ||
20380731 | 1449 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1450 | { |
1451 | struct in6_addr addr; | |
1452 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1453 | if (ipv6_addr_any(&addr)) | |
1454 | return; | |
1455 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1456 | } | |
1457 | ||
20380731 | 1458 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1459 | { |
1460 | struct in6_addr addr; | |
1461 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1462 | if (ipv6_addr_any(&addr)) | |
1463 | return; | |
1464 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1465 | } | |
1466 | ||
073a8e0e YH |
1467 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1468 | { | |
1469 | if (dev->addr_len != ETH_ALEN) | |
1470 | return -1; | |
1471 | memcpy(eui, dev->dev_addr, 3); | |
1472 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1473 | ||
1474 | /* | |
1475 | * The zSeries OSA network cards can be shared among various | |
1476 | * OS instances, but the OSA cards have only one MAC address. | |
1477 | * This leads to duplicate address conflicts in conjunction | |
1478 | * with IPv6 if more than one instance uses the same card. | |
1479 | * | |
1480 | * The driver for these cards can deliver a unique 16-bit | |
1481 | * identifier for each instance sharing the same card. It is | |
1482 | * placed instead of 0xFFFE in the interface identifier. The | |
1483 | * "u" bit of the interface identifier is not inverted in this | |
1484 | * case. Hence the resulting interface identifier has local | |
1485 | * scope according to RFC2373. | |
1486 | */ | |
1487 | if (dev->dev_id) { | |
1488 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1489 | eui[4] = dev->dev_id & 0xFF; | |
1490 | } else { | |
1491 | eui[3] = 0xFF; | |
1492 | eui[4] = 0xFE; | |
1493 | eui[0] ^= 2; | |
1494 | } | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1499 | { | |
1500 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1501 | if (dev->addr_len != ARCNET_ALEN) | |
1502 | return -1; | |
1503 | memset(eui, 0, 7); | |
1504 | eui[7] = *(u8*)dev->dev_addr; | |
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1509 | { | |
1510 | if (dev->addr_len != INFINIBAND_ALEN) | |
1511 | return -1; | |
1512 | memcpy(eui, dev->dev_addr + 12, 8); | |
1513 | eui[0] |= 2; | |
1514 | return 0; | |
1515 | } | |
1516 | ||
dfd982ba YH |
1517 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1518 | { | |
9af28511 SH |
1519 | if (addr == 0) |
1520 | return -1; | |
dfd982ba YH |
1521 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1522 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1523 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1524 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1525 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1526 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1527 | eui[1] = 0; | |
1528 | eui[2] = 0x5E; | |
1529 | eui[3] = 0xFE; | |
1530 | memcpy(eui + 4, &addr, 4); | |
1531 | return 0; | |
1532 | } | |
1533 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1534 | ||
1535 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1536 | { | |
1537 | if (dev->priv_flags & IFF_ISATAP) | |
1538 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1539 | return -1; | |
1540 | } | |
1541 | ||
1da177e4 LT |
1542 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1543 | { | |
1544 | switch (dev->type) { | |
1545 | case ARPHRD_ETHER: | |
1546 | case ARPHRD_FDDI: | |
1547 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1548 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1549 | case ARPHRD_ARCNET: |
073a8e0e | 1550 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1551 | case ARPHRD_INFINIBAND: |
073a8e0e | 1552 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1553 | case ARPHRD_SIT: |
dfd982ba | 1554 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1555 | } |
1556 | return -1; | |
1557 | } | |
1558 | ||
1559 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1560 | { | |
1561 | int err = -1; | |
1562 | struct inet6_ifaddr *ifp; | |
1563 | ||
1564 | read_lock_bh(&idev->lock); | |
502a2ffd | 1565 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1566 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1567 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1568 | err = 0; | |
1569 | break; | |
1570 | } | |
1571 | } | |
1572 | read_unlock_bh(&idev->lock); | |
1573 | return err; | |
1574 | } | |
1575 | ||
1576 | #ifdef CONFIG_IPV6_PRIVACY | |
1577 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1578 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1579 | { | |
1da177e4 | 1580 | regen: |
955189ef | 1581 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1582 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1583 | |
1584 | /* | |
1585 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1586 | * check if generated address is not inappropriate | |
1587 | * | |
1588 | * - Reserved subnet anycast (RFC 2526) | |
1589 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1590 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1591 | * 00-00-5E-FE-xx-xx-xx-xx |
1592 | * - value 0 | |
1593 | * - XXX: already assigned to an address on the device | |
1594 | */ | |
1ab1457c | 1595 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1596 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1597 | (idev->rndid[7]&0x80)) | |
1598 | goto regen; | |
1599 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1600 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1601 | goto regen; | |
1602 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1603 | goto regen; | |
1604 | } | |
1605 | ||
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static void ipv6_regen_rndid(unsigned long data) | |
1610 | { | |
1611 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1612 | unsigned long expires; | |
1613 | ||
8814c4b5 | 1614 | rcu_read_lock_bh(); |
1da177e4 LT |
1615 | write_lock_bh(&idev->lock); |
1616 | ||
1617 | if (idev->dead) | |
1618 | goto out; | |
1619 | ||
1620 | if (__ipv6_regen_rndid(idev) < 0) | |
1621 | goto out; | |
1ab1457c | 1622 | |
1da177e4 | 1623 | expires = jiffies + |
1ab1457c | 1624 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1625 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1626 | if (time_before(expires, jiffies)) { | |
1627 | printk(KERN_WARNING | |
1628 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1629 | idev->dev->name); | |
1630 | goto out; | |
1631 | } | |
1632 | ||
1633 | if (!mod_timer(&idev->regen_timer, expires)) | |
1634 | in6_dev_hold(idev); | |
1635 | ||
1636 | out: | |
1637 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1638 | rcu_read_unlock_bh(); |
1da177e4 LT |
1639 | in6_dev_put(idev); |
1640 | } | |
1641 | ||
1642 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1643 | int ret = 0; | |
1644 | ||
1645 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1646 | ret = __ipv6_regen_rndid(idev); | |
1647 | return ret; | |
1648 | } | |
1649 | #endif | |
1650 | ||
1651 | /* | |
1652 | * Add prefix route. | |
1653 | */ | |
1654 | ||
1655 | static void | |
1656 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1657 | unsigned long expires, u32 flags) |
1da177e4 | 1658 | { |
86872cb5 TG |
1659 | struct fib6_config cfg = { |
1660 | .fc_table = RT6_TABLE_PREFIX, | |
1661 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1662 | .fc_ifindex = dev->ifindex, | |
1663 | .fc_expires = expires, | |
1664 | .fc_dst_len = plen, | |
1665 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1666 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1667 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1668 | }; |
1da177e4 | 1669 | |
86872cb5 | 1670 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1671 | |
1672 | /* Prevent useless cloning on PtP SIT. | |
1673 | This thing is done here expecting that the whole | |
1674 | class of non-broadcast devices need not cloning. | |
1675 | */ | |
0be669bb | 1676 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1677 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1678 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1679 | #endif |
1da177e4 | 1680 | |
86872cb5 | 1681 | ip6_route_add(&cfg); |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | /* Create "default" multicast route to the interface */ | |
1685 | ||
1686 | static void addrconf_add_mroute(struct net_device *dev) | |
1687 | { | |
86872cb5 TG |
1688 | struct fib6_config cfg = { |
1689 | .fc_table = RT6_TABLE_LOCAL, | |
1690 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1691 | .fc_ifindex = dev->ifindex, | |
1692 | .fc_dst_len = 8, | |
1693 | .fc_flags = RTF_UP, | |
c346dca1 | 1694 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1695 | }; |
1696 | ||
1697 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1698 | ||
1699 | ip6_route_add(&cfg); | |
1da177e4 LT |
1700 | } |
1701 | ||
0be669bb | 1702 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1703 | static void sit_route_add(struct net_device *dev) |
1704 | { | |
86872cb5 TG |
1705 | struct fib6_config cfg = { |
1706 | .fc_table = RT6_TABLE_MAIN, | |
1707 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1708 | .fc_ifindex = dev->ifindex, | |
1709 | .fc_dst_len = 96, | |
1710 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1711 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1712 | }; |
1da177e4 LT |
1713 | |
1714 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1715 | ip6_route_add(&cfg); |
1da177e4 | 1716 | } |
0be669bb | 1717 | #endif |
1da177e4 LT |
1718 | |
1719 | static void addrconf_add_lroute(struct net_device *dev) | |
1720 | { | |
1721 | struct in6_addr addr; | |
1722 | ||
1723 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1724 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1725 | } | |
1726 | ||
1727 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1728 | { | |
1729 | struct inet6_dev *idev; | |
1730 | ||
1731 | ASSERT_RTNL(); | |
1732 | ||
e21e8467 SH |
1733 | idev = ipv6_find_idev(dev); |
1734 | if (!idev) | |
1da177e4 LT |
1735 | return NULL; |
1736 | ||
1737 | /* Add default multicast route */ | |
1738 | addrconf_add_mroute(dev); | |
1739 | ||
1740 | /* Add link local route */ | |
1741 | addrconf_add_lroute(dev); | |
1742 | return idev; | |
1743 | } | |
1744 | ||
1745 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1746 | { | |
1747 | struct prefix_info *pinfo; | |
1748 | __u32 valid_lft; | |
1749 | __u32 prefered_lft; | |
1750 | int addr_type; | |
1da177e4 | 1751 | struct inet6_dev *in6_dev; |
56d417b1 | 1752 | struct net *net = dev_net(dev); |
1da177e4 LT |
1753 | |
1754 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1755 | |
1da177e4 LT |
1756 | if (len < sizeof(struct prefix_info)) { |
1757 | ADBG(("addrconf: prefix option too short\n")); | |
1758 | return; | |
1759 | } | |
1ab1457c | 1760 | |
1da177e4 LT |
1761 | /* |
1762 | * Validation checks ([ADDRCONF], page 19) | |
1763 | */ | |
1764 | ||
1765 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1766 | ||
1767 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1768 | return; | |
1769 | ||
1770 | valid_lft = ntohl(pinfo->valid); | |
1771 | prefered_lft = ntohl(pinfo->prefered); | |
1772 | ||
1773 | if (prefered_lft > valid_lft) { | |
1774 | if (net_ratelimit()) | |
1775 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1776 | return; | |
1777 | } | |
1778 | ||
1779 | in6_dev = in6_dev_get(dev); | |
1780 | ||
1781 | if (in6_dev == NULL) { | |
1782 | if (net_ratelimit()) | |
1783 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | /* | |
1788 | * Two things going on here: | |
1789 | * 1) Add routes for on-link prefixes | |
1790 | * 2) Configure prefixes with the auto flag set | |
1791 | */ | |
1792 | ||
4bed72e4 YH |
1793 | if (pinfo->onlink) { |
1794 | struct rt6_info *rt; | |
1795 | unsigned long rt_expires; | |
1796 | ||
6f704992 YH |
1797 | /* Avoid arithmetic overflow. Really, we could |
1798 | * save rt_expires in seconds, likely valid_lft, | |
1799 | * but it would require division in fib gc, that it | |
1800 | * not good. | |
1801 | */ | |
4bed72e4 YH |
1802 | if (HZ > USER_HZ) |
1803 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1804 | else | |
1805 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1806 | |
4bed72e4 YH |
1807 | if (addrconf_finite_timeout(rt_expires)) |
1808 | rt_expires *= HZ; | |
1da177e4 | 1809 | |
56d417b1 | 1810 | rt = rt6_lookup(net, &pinfo->prefix, NULL, |
6fda7350 | 1811 | dev->ifindex, 1); |
1da177e4 | 1812 | |
2b5ead46 | 1813 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1814 | /* Autoconf prefix route */ |
1815 | if (valid_lft == 0) { | |
1816 | ip6_del_rt(rt); | |
1817 | rt = NULL; | |
4bed72e4 | 1818 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1819 | /* not infinity */ |
1820 | rt->rt6i_expires = jiffies + rt_expires; | |
1821 | rt->rt6i_flags |= RTF_EXPIRES; | |
1822 | } else { | |
1823 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1824 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1825 | } |
1826 | } else if (valid_lft) { | |
6f704992 | 1827 | clock_t expires = 0; |
4bed72e4 YH |
1828 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1829 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1830 | /* not infinity */ |
1831 | flags |= RTF_EXPIRES; | |
1832 | expires = jiffies_to_clock_t(rt_expires); | |
1833 | } | |
1da177e4 | 1834 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1835 | dev, expires, flags); |
1da177e4 LT |
1836 | } |
1837 | if (rt) | |
1838 | dst_release(&rt->u.dst); | |
1839 | } | |
1840 | ||
1841 | /* Try to figure out our local address for this prefix */ | |
1842 | ||
1843 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1844 | struct inet6_ifaddr * ifp; | |
1845 | struct in6_addr addr; | |
1846 | int create = 0, update_lft = 0; | |
1847 | ||
1848 | if (pinfo->prefix_len == 64) { | |
1849 | memcpy(&addr, &pinfo->prefix, 8); | |
1850 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1851 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1852 | in6_dev_put(in6_dev); | |
1853 | return; | |
1854 | } | |
1855 | goto ok; | |
1856 | } | |
1857 | if (net_ratelimit()) | |
1858 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1859 | pinfo->prefix_len); | |
1860 | in6_dev_put(in6_dev); | |
1861 | return; | |
1862 | ||
1863 | ok: | |
1864 | ||
53b7997f | 1865 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1866 | |
1867 | if (ifp == NULL && valid_lft) { | |
1868 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1869 | u32 addr_flags = 0; |
1870 | ||
1871 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1872 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1873 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1874 | addr_flags = IFA_F_OPTIMISTIC; |
1875 | #endif | |
1da177e4 LT |
1876 | |
1877 | /* Do not allow to create too much of autoconfigured | |
1878 | * addresses; this would be too easy way to crash kernel. | |
1879 | */ | |
1880 | if (!max_addresses || | |
1881 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1882 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1883 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1884 | addr_flags); | |
1da177e4 LT |
1885 | |
1886 | if (!ifp || IS_ERR(ifp)) { | |
1887 | in6_dev_put(in6_dev); | |
1888 | return; | |
1889 | } | |
1890 | ||
1891 | update_lft = create = 1; | |
1892 | ifp->cstamp = jiffies; | |
1893 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1894 | } | |
1895 | ||
1896 | if (ifp) { | |
1897 | int flags; | |
1898 | unsigned long now; | |
1899 | #ifdef CONFIG_IPV6_PRIVACY | |
1900 | struct inet6_ifaddr *ift; | |
1901 | #endif | |
1902 | u32 stored_lft; | |
1903 | ||
1904 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1905 | spin_lock(&ifp->lock); | |
1906 | now = jiffies; | |
1907 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1908 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1909 | else | |
1910 | stored_lft = 0; | |
1911 | if (!update_lft && stored_lft) { | |
1912 | if (valid_lft > MIN_VALID_LIFETIME || | |
1913 | valid_lft > stored_lft) | |
1914 | update_lft = 1; | |
1915 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1916 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1917 | /* |
1918 | * RFC 4862 Section 5.5.3e: | |
1919 | * "Note that the preferred lifetime of | |
1920 | * the corresponding address is always | |
1921 | * reset to the Preferred Lifetime in | |
1922 | * the received Prefix Information | |
1923 | * option, regardless of whether the | |
1924 | * valid lifetime is also reset or | |
1925 | * ignored." | |
1926 | * | |
1927 | * So if the preferred lifetime in | |
1928 | * this advertisement is different | |
1929 | * than what we have stored, but the | |
1930 | * valid lifetime is invalid, just | |
1931 | * reset prefered_lft. | |
1932 | * | |
1933 | * We must set the valid lifetime | |
1934 | * to the stored lifetime since we'll | |
1935 | * be updating the timestamp below, | |
1936 | * else we'll set it back to the | |
1937 | * minumum. | |
1938 | */ | |
1939 | if (prefered_lft != ifp->prefered_lft) { | |
1940 | valid_lft = stored_lft; | |
1941 | update_lft = 1; | |
1942 | } | |
1da177e4 LT |
1943 | } else { |
1944 | valid_lft = MIN_VALID_LIFETIME; | |
1945 | if (valid_lft < prefered_lft) | |
1946 | prefered_lft = valid_lft; | |
1947 | update_lft = 1; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | if (update_lft) { | |
1952 | ifp->valid_lft = valid_lft; | |
1953 | ifp->prefered_lft = prefered_lft; | |
1954 | ifp->tstamp = now; | |
1955 | flags = ifp->flags; | |
1956 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1957 | spin_unlock(&ifp->lock); | |
1958 | ||
1959 | if (!(flags&IFA_F_TENTATIVE)) | |
1960 | ipv6_ifa_notify(0, ifp); | |
1961 | } else | |
1962 | spin_unlock(&ifp->lock); | |
1963 | ||
1964 | #ifdef CONFIG_IPV6_PRIVACY | |
1965 | read_lock_bh(&in6_dev->lock); | |
1966 | /* update all temporary addresses in the list */ | |
372e6c8f | 1967 | list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) { |
1da177e4 LT |
1968 | /* |
1969 | * When adjusting the lifetimes of an existing | |
1970 | * temporary address, only lower the lifetimes. | |
1971 | * Implementations must not increase the | |
1972 | * lifetimes of an existing temporary address | |
1973 | * when processing a Prefix Information Option. | |
1974 | */ | |
c6fbfac2 BB |
1975 | if (ifp != ift->ifpub) |
1976 | continue; | |
1977 | ||
1da177e4 LT |
1978 | spin_lock(&ift->lock); |
1979 | flags = ift->flags; | |
1980 | if (ift->valid_lft > valid_lft && | |
1981 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1982 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1983 | if (ift->prefered_lft > prefered_lft && | |
1984 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1985 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1986 | spin_unlock(&ift->lock); | |
1987 | if (!(flags&IFA_F_TENTATIVE)) | |
1988 | ipv6_ifa_notify(0, ift); | |
1989 | } | |
1990 | ||
1991 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1992 | /* | |
1993 | * When a new public address is created as described in [ADDRCONF], | |
1994 | * also create a new temporary address. | |
1995 | */ | |
1ab1457c | 1996 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1997 | ipv6_create_tempaddr(ifp, NULL); |
1998 | } else { | |
1999 | read_unlock_bh(&in6_dev->lock); | |
2000 | } | |
2001 | #endif | |
2002 | in6_ifa_put(ifp); | |
2003 | addrconf_verify(0); | |
2004 | } | |
2005 | } | |
2006 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2007 | in6_dev_put(in6_dev); | |
2008 | } | |
2009 | ||
2010 | /* | |
2011 | * Set destination address. | |
2012 | * Special case for SIT interfaces where we create a new "virtual" | |
2013 | * device. | |
2014 | */ | |
af284937 | 2015 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2016 | { |
2017 | struct in6_ifreq ireq; | |
2018 | struct net_device *dev; | |
2019 | int err = -EINVAL; | |
2020 | ||
2021 | rtnl_lock(); | |
2022 | ||
2023 | err = -EFAULT; | |
2024 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2025 | goto err_exit; | |
2026 | ||
af284937 | 2027 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2028 | |
2029 | err = -ENODEV; | |
2030 | if (dev == NULL) | |
2031 | goto err_exit; | |
2032 | ||
0be669bb | 2033 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2034 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2035 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2036 | struct ifreq ifr; |
1da177e4 LT |
2037 | struct ip_tunnel_parm p; |
2038 | ||
2039 | err = -EADDRNOTAVAIL; | |
2040 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2041 | goto err_exit; | |
2042 | ||
2043 | memset(&p, 0, sizeof(p)); | |
2044 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2045 | p.iph.saddr = 0; | |
2046 | p.iph.version = 4; | |
2047 | p.iph.ihl = 5; | |
2048 | p.iph.protocol = IPPROTO_IPV6; | |
2049 | p.iph.ttl = 64; | |
d20b3109 | 2050 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2051 | |
5bc3eb7e SH |
2052 | if (ops->ndo_do_ioctl) { |
2053 | mm_segment_t oldfs = get_fs(); | |
2054 | ||
2055 | set_fs(KERNEL_DS); | |
2056 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2057 | set_fs(oldfs); | |
2058 | } else | |
2059 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2060 | |
2061 | if (err == 0) { | |
2062 | err = -ENOBUFS; | |
af284937 DL |
2063 | dev = __dev_get_by_name(net, p.name); |
2064 | if (!dev) | |
1da177e4 LT |
2065 | goto err_exit; |
2066 | err = dev_open(dev); | |
2067 | } | |
2068 | } | |
0be669bb | 2069 | #endif |
1da177e4 LT |
2070 | |
2071 | err_exit: | |
2072 | rtnl_unlock(); | |
2073 | return err; | |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * Manual configuration of address on an interface | |
2078 | */ | |
af284937 | 2079 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2080 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2081 | __u32 valid_lft) |
1da177e4 LT |
2082 | { |
2083 | struct inet6_ifaddr *ifp; | |
2084 | struct inet6_dev *idev; | |
2085 | struct net_device *dev; | |
2086 | int scope; | |
6f704992 YH |
2087 | u32 flags; |
2088 | clock_t expires; | |
4bed72e4 | 2089 | unsigned long timeout; |
1da177e4 LT |
2090 | |
2091 | ASSERT_RTNL(); | |
1ab1457c | 2092 | |
24ef0da7 TG |
2093 | if (plen > 128) |
2094 | return -EINVAL; | |
2095 | ||
0778769d NT |
2096 | /* check the lifetime */ |
2097 | if (!valid_lft || prefered_lft > valid_lft) | |
2098 | return -EINVAL; | |
2099 | ||
af284937 DL |
2100 | dev = __dev_get_by_index(net, ifindex); |
2101 | if (!dev) | |
1da177e4 | 2102 | return -ENODEV; |
1ab1457c | 2103 | |
1da177e4 LT |
2104 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2105 | return -ENOBUFS; | |
2106 | ||
2107 | scope = ipv6_addr_scope(pfx); | |
2108 | ||
4bed72e4 YH |
2109 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2110 | if (addrconf_finite_timeout(timeout)) { | |
2111 | expires = jiffies_to_clock_t(timeout * HZ); | |
2112 | valid_lft = timeout; | |
6f704992 | 2113 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2114 | } else { |
2115 | expires = 0; | |
2116 | flags = 0; | |
2117 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2118 | } |
0778769d | 2119 | |
4bed72e4 YH |
2120 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2121 | if (addrconf_finite_timeout(timeout)) { | |
2122 | if (timeout == 0) | |
2123 | ifa_flags |= IFA_F_DEPRECATED; | |
2124 | prefered_lft = timeout; | |
2125 | } | |
0778769d NT |
2126 | |
2127 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2128 | ||
1da177e4 | 2129 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2130 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2131 | ifp->valid_lft = valid_lft; |
2132 | ifp->prefered_lft = prefered_lft; | |
2133 | ifp->tstamp = jiffies; | |
06aebfb7 | 2134 | spin_unlock_bh(&ifp->lock); |
0778769d | 2135 | |
46d48046 | 2136 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2137 | expires, flags); |
95c385b4 NH |
2138 | /* |
2139 | * Note that section 3.1 of RFC 4429 indicates | |
2140 | * that the Optimistic flag should not be set for | |
2141 | * manually configured addresses | |
2142 | */ | |
1da177e4 LT |
2143 | addrconf_dad_start(ifp, 0); |
2144 | in6_ifa_put(ifp); | |
0778769d | 2145 | addrconf_verify(0); |
1da177e4 LT |
2146 | return 0; |
2147 | } | |
2148 | ||
2149 | return PTR_ERR(ifp); | |
2150 | } | |
2151 | ||
af284937 | 2152 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2153 | unsigned int plen) |
1da177e4 LT |
2154 | { |
2155 | struct inet6_ifaddr *ifp; | |
2156 | struct inet6_dev *idev; | |
2157 | struct net_device *dev; | |
1ab1457c | 2158 | |
24ef0da7 TG |
2159 | if (plen > 128) |
2160 | return -EINVAL; | |
2161 | ||
af284937 DL |
2162 | dev = __dev_get_by_index(net, ifindex); |
2163 | if (!dev) | |
1da177e4 LT |
2164 | return -ENODEV; |
2165 | ||
2166 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2167 | return -ENXIO; | |
2168 | ||
2169 | read_lock_bh(&idev->lock); | |
502a2ffd | 2170 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2171 | if (ifp->prefix_len == plen && |
2172 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2173 | in6_ifa_hold(ifp); | |
2174 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2175 | |
1da177e4 LT |
2176 | ipv6_del_addr(ifp); |
2177 | ||
2178 | /* If the last address is deleted administratively, | |
2179 | disable IPv6 on this interface. | |
2180 | */ | |
502a2ffd | 2181 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2182 | addrconf_ifdown(idev->dev, 1); |
2183 | return 0; | |
2184 | } | |
2185 | } | |
2186 | read_unlock_bh(&idev->lock); | |
2187 | return -EADDRNOTAVAIL; | |
2188 | } | |
2189 | ||
2190 | ||
af284937 | 2191 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2192 | { |
2193 | struct in6_ifreq ireq; | |
2194 | int err; | |
1ab1457c | 2195 | |
1da177e4 LT |
2196 | if (!capable(CAP_NET_ADMIN)) |
2197 | return -EPERM; | |
1ab1457c | 2198 | |
1da177e4 LT |
2199 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2200 | return -EFAULT; | |
2201 | ||
2202 | rtnl_lock(); | |
af284937 DL |
2203 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2204 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2205 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2206 | rtnl_unlock(); |
2207 | return err; | |
2208 | } | |
2209 | ||
af284937 | 2210 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2211 | { |
2212 | struct in6_ifreq ireq; | |
2213 | int err; | |
1ab1457c | 2214 | |
1da177e4 LT |
2215 | if (!capable(CAP_NET_ADMIN)) |
2216 | return -EPERM; | |
2217 | ||
2218 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2219 | return -EFAULT; | |
2220 | ||
2221 | rtnl_lock(); | |
af284937 DL |
2222 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2223 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2224 | rtnl_unlock(); |
2225 | return err; | |
2226 | } | |
2227 | ||
b5f348e5 IJ |
2228 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2229 | int plen, int scope) | |
2230 | { | |
2231 | struct inet6_ifaddr *ifp; | |
2232 | ||
2233 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2234 | if (!IS_ERR(ifp)) { | |
2235 | spin_lock_bh(&ifp->lock); | |
2236 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2237 | spin_unlock_bh(&ifp->lock); | |
2238 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2239 | in6_ifa_put(ifp); | |
2240 | } | |
2241 | } | |
2242 | ||
0be669bb | 2243 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2244 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2245 | { | |
1da177e4 LT |
2246 | struct in6_addr addr; |
2247 | struct net_device *dev; | |
c346dca1 | 2248 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2249 | int scope; |
2250 | ||
2251 | ASSERT_RTNL(); | |
2252 | ||
2253 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2254 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2255 | ||
2256 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2257 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2258 | scope = IFA_LINK; | |
2259 | } else { | |
2260 | scope = IPV6_ADDR_COMPATv4; | |
2261 | } | |
2262 | ||
2263 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2264 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2265 | return; |
2266 | } | |
2267 | ||
6fda7350 | 2268 | for_each_netdev(net, dev) { |
e5ed6399 | 2269 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2270 | if (in_dev && (dev->flags & IFF_UP)) { |
2271 | struct in_ifaddr * ifa; | |
2272 | ||
2273 | int flag = scope; | |
2274 | ||
2275 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2276 | int plen; | |
2277 | ||
2278 | addr.s6_addr32[3] = ifa->ifa_local; | |
2279 | ||
2280 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2281 | continue; | |
2282 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2283 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2284 | continue; | |
2285 | flag |= IFA_HOST; | |
2286 | } | |
2287 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2288 | plen = 64; | |
2289 | else | |
2290 | plen = 96; | |
2291 | ||
b5f348e5 | 2292 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2293 | } |
2294 | } | |
1ab1457c | 2295 | } |
1da177e4 | 2296 | } |
0be669bb | 2297 | #endif |
1da177e4 LT |
2298 | |
2299 | static void init_loopback(struct net_device *dev) | |
2300 | { | |
2301 | struct inet6_dev *idev; | |
1da177e4 LT |
2302 | |
2303 | /* ::1 */ | |
2304 | ||
2305 | ASSERT_RTNL(); | |
2306 | ||
2307 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2308 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2309 | return; | |
2310 | } | |
2311 | ||
b5f348e5 | 2312 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2313 | } |
2314 | ||
2315 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2316 | { | |
2317 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2318 | u32 addr_flags = IFA_F_PERMANENT; |
2319 | ||
2320 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2321 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2322 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2323 | addr_flags |= IFA_F_OPTIMISTIC; |
2324 | #endif | |
1da177e4 | 2325 | |
95c385b4 NH |
2326 | |
2327 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2328 | if (!IS_ERR(ifp)) { |
46d48046 | 2329 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2330 | addrconf_dad_start(ifp, 0); |
2331 | in6_ifa_put(ifp); | |
2332 | } | |
2333 | } | |
2334 | ||
2335 | static void addrconf_dev_config(struct net_device *dev) | |
2336 | { | |
2337 | struct in6_addr addr; | |
2338 | struct inet6_dev * idev; | |
2339 | ||
2340 | ASSERT_RTNL(); | |
2341 | ||
74235a25 HX |
2342 | if ((dev->type != ARPHRD_ETHER) && |
2343 | (dev->type != ARPHRD_FDDI) && | |
2344 | (dev->type != ARPHRD_IEEE802_TR) && | |
2345 | (dev->type != ARPHRD_ARCNET) && | |
2346 | (dev->type != ARPHRD_INFINIBAND)) { | |
2347 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2348 | return; | |
2349 | } | |
2350 | ||
1da177e4 LT |
2351 | idev = addrconf_add_dev(dev); |
2352 | if (idev == NULL) | |
2353 | return; | |
2354 | ||
2355 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2356 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2357 | ||
2358 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2359 | addrconf_add_linklocal(idev, &addr); | |
2360 | } | |
2361 | ||
0be669bb | 2362 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2363 | static void addrconf_sit_config(struct net_device *dev) |
2364 | { | |
2365 | struct inet6_dev *idev; | |
2366 | ||
2367 | ASSERT_RTNL(); | |
2368 | ||
1ab1457c YH |
2369 | /* |
2370 | * Configure the tunnel with one of our IPv4 | |
2371 | * addresses... we should configure all of | |
1da177e4 LT |
2372 | * our v4 addrs in the tunnel |
2373 | */ | |
2374 | ||
2375 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2376 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2377 | return; | |
2378 | } | |
2379 | ||
c7dc89c0 FT |
2380 | if (dev->priv_flags & IFF_ISATAP) { |
2381 | struct in6_addr addr; | |
2382 | ||
2383 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2384 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2385 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2386 | addrconf_add_linklocal(idev, &addr); | |
2387 | return; | |
2388 | } | |
2389 | ||
1da177e4 LT |
2390 | sit_add_v4_addrs(idev); |
2391 | ||
2392 | if (dev->flags&IFF_POINTOPOINT) { | |
2393 | addrconf_add_mroute(dev); | |
2394 | addrconf_add_lroute(dev); | |
2395 | } else | |
2396 | sit_route_add(dev); | |
2397 | } | |
0be669bb | 2398 | #endif |
1da177e4 LT |
2399 | |
2400 | static inline int | |
2401 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2402 | { | |
2403 | struct in6_addr lladdr; | |
2404 | ||
95c385b4 | 2405 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2406 | addrconf_add_linklocal(idev, &lladdr); |
2407 | return 0; | |
2408 | } | |
2409 | return -1; | |
2410 | } | |
2411 | ||
2412 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2413 | { | |
2414 | struct net_device *link_dev; | |
c346dca1 | 2415 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2416 | |
2417 | /* first try to inherit the link-local address from the link device */ | |
2418 | if (idev->dev->iflink && | |
6fda7350 | 2419 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2420 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2421 | return; | |
2422 | } | |
2423 | /* then try to inherit it from any device */ | |
6fda7350 | 2424 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2425 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2426 | return; | |
2427 | } | |
2428 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2429 | } | |
2430 | ||
2431 | /* | |
2432 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2433 | * DHCPv6, MLD etc. can be run over the virtual link | |
2434 | */ | |
2435 | ||
2436 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2437 | { | |
2438 | struct inet6_dev *idev; | |
2439 | ||
2440 | ASSERT_RTNL(); | |
2441 | ||
e21e8467 SH |
2442 | idev = addrconf_add_dev(dev); |
2443 | if (!idev) { | |
1da177e4 LT |
2444 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
2445 | return; | |
2446 | } | |
2447 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2448 | } |
2449 | ||
1ab1457c | 2450 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2451 | void * data) |
2452 | { | |
2453 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2454 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2455 | int run_pending = 0; |
b217d616 | 2456 | int err; |
1da177e4 | 2457 | |
e21e8467 | 2458 | switch (event) { |
45ba9dd2 | 2459 | case NETDEV_REGISTER: |
74235a25 | 2460 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2461 | idev = ipv6_add_dev(dev); |
2462 | if (!idev) | |
b217d616 | 2463 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2464 | } |
2465 | break; | |
bcdd553f | 2466 | |
1da177e4 | 2467 | case NETDEV_UP: |
3c21edbd | 2468 | case NETDEV_CHANGE: |
c2edacf8 JV |
2469 | if (dev->flags & IFF_SLAVE) |
2470 | break; | |
2471 | ||
3c21edbd | 2472 | if (event == NETDEV_UP) { |
f24e3d65 | 2473 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2474 | /* device is not ready yet. */ |
2475 | printk(KERN_INFO | |
2476 | "ADDRCONF(NETDEV_UP): %s: " | |
2477 | "link is not ready\n", | |
2478 | dev->name); | |
2479 | break; | |
2480 | } | |
99081049 | 2481 | |
d31c7b8f EP |
2482 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2483 | idev = ipv6_add_dev(dev); | |
2484 | ||
e3ec6cfc | 2485 | if (idev) { |
99081049 | 2486 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2487 | run_pending = 1; |
2488 | } | |
3c21edbd | 2489 | } else { |
f24e3d65 | 2490 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2491 | /* device is still not ready. */ |
2492 | break; | |
2493 | } | |
2494 | ||
2495 | if (idev) { | |
bcdd553f | 2496 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2497 | /* device is already configured. */ |
2498 | break; | |
3c21edbd YH |
2499 | idev->if_flags |= IF_READY; |
2500 | } | |
2501 | ||
2502 | printk(KERN_INFO | |
2503 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2504 | "link becomes ready\n", | |
2505 | dev->name); | |
2506 | ||
c5e33bdd | 2507 | run_pending = 1; |
3c21edbd YH |
2508 | } |
2509 | ||
e21e8467 | 2510 | switch (dev->type) { |
0be669bb | 2511 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2512 | case ARPHRD_SIT: |
2513 | addrconf_sit_config(dev); | |
2514 | break; | |
0be669bb | 2515 | #endif |
1da177e4 LT |
2516 | case ARPHRD_TUNNEL6: |
2517 | addrconf_ip6_tnl_config(dev); | |
2518 | break; | |
2519 | case ARPHRD_LOOPBACK: | |
2520 | init_loopback(dev); | |
2521 | break; | |
2522 | ||
2523 | default: | |
2524 | addrconf_dev_config(dev); | |
2525 | break; | |
3ff50b79 | 2526 | } |
bcdd553f | 2527 | |
1da177e4 | 2528 | if (idev) { |
c5e33bdd YH |
2529 | if (run_pending) |
2530 | addrconf_dad_run(idev); | |
2531 | ||
bcdd553f SH |
2532 | /* |
2533 | * If the MTU changed during the interface down, | |
2534 | * when the interface up, the changed MTU must be | |
2535 | * reflected in the idev as well as routers. | |
1da177e4 | 2536 | */ |
bcdd553f SH |
2537 | if (idev->cnf.mtu6 != dev->mtu && |
2538 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2539 | rt6_mtu_change(dev, dev->mtu); |
2540 | idev->cnf.mtu6 = dev->mtu; | |
2541 | } | |
2542 | idev->tstamp = jiffies; | |
2543 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2544 | |
2545 | /* | |
2546 | * If the changed mtu during down is lower than | |
2547 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2548 | */ |
2549 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2550 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2551 | } |
2552 | break; | |
2553 | ||
2554 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2555 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2556 | rt6_mtu_change(dev, dev->mtu); |
2557 | idev->cnf.mtu6 = dev->mtu; | |
2558 | break; | |
2559 | } | |
2560 | ||
d31c7b8f EP |
2561 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2562 | idev = ipv6_add_dev(dev); | |
2563 | if (idev) | |
2564 | break; | |
2565 | } | |
2566 | ||
bcdd553f SH |
2567 | /* |
2568 | * MTU falled under IPV6_MIN_MTU. | |
2569 | * Stop IPv6 on this interface. | |
2570 | */ | |
1da177e4 LT |
2571 | |
2572 | case NETDEV_DOWN: | |
2573 | case NETDEV_UNREGISTER: | |
2574 | /* | |
2575 | * Remove all addresses from this interface. | |
2576 | */ | |
2577 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2578 | break; | |
3c21edbd | 2579 | |
1da177e4 | 2580 | case NETDEV_CHANGENAME: |
1da177e4 | 2581 | if (idev) { |
5632c515 | 2582 | snmp6_unregister_dev(idev); |
408c4768 | 2583 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2584 | addrconf_sysctl_register(idev); |
b217d616 HX |
2585 | err = snmp6_register_dev(idev); |
2586 | if (err) | |
2587 | return notifier_from_errno(err); | |
5632c515 | 2588 | } |
1da177e4 | 2589 | break; |
bcdd553f | 2590 | |
93d9b7d7 JP |
2591 | case NETDEV_PRE_TYPE_CHANGE: |
2592 | case NETDEV_POST_TYPE_CHANGE: | |
2593 | addrconf_type_change(dev, event); | |
75c78500 | 2594 | break; |
3ff50b79 | 2595 | } |
1da177e4 LT |
2596 | |
2597 | return NOTIFY_OK; | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * addrconf module should be notified of a device going up | |
2602 | */ | |
2603 | static struct notifier_block ipv6_dev_notf = { | |
2604 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2605 | }; |
2606 | ||
93d9b7d7 | 2607 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2608 | { |
2609 | struct inet6_dev *idev; | |
2610 | ASSERT_RTNL(); | |
2611 | ||
2612 | idev = __in6_dev_get(dev); | |
2613 | ||
93d9b7d7 | 2614 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2615 | ipv6_mc_remap(idev); |
93d9b7d7 | 2616 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2617 | ipv6_mc_unmap(idev); |
2618 | } | |
2619 | ||
1da177e4 LT |
2620 | static int addrconf_ifdown(struct net_device *dev, int how) |
2621 | { | |
c346dca1 | 2622 | struct net *net = dev_net(dev); |
502a2ffd | 2623 | struct inet6_dev *idev; |
2624 | struct inet6_ifaddr *ifa; | |
2625 | LIST_HEAD(keep_list); | |
1da177e4 LT |
2626 | |
2627 | ASSERT_RTNL(); | |
2628 | ||
f3db4851 | 2629 | rt6_ifdown(net, dev); |
1da177e4 LT |
2630 | neigh_ifdown(&nd_tbl, dev); |
2631 | ||
2632 | idev = __in6_dev_get(dev); | |
2633 | if (idev == NULL) | |
2634 | return -ENODEV; | |
2635 | ||
bcdd553f SH |
2636 | /* |
2637 | * Step 1: remove reference to ipv6 device from parent device. | |
2638 | * Do not dev_put! | |
1da177e4 | 2639 | */ |
439e2385 | 2640 | if (how) { |
1da177e4 | 2641 | idev->dead = 1; |
8814c4b5 YH |
2642 | |
2643 | /* protected by rtnl_lock */ | |
2644 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2645 | |
2646 | /* Step 1.5: remove snmp6 entry */ | |
2647 | snmp6_unregister_dev(idev); | |
2648 | ||
2649 | } | |
2650 | ||
1da177e4 LT |
2651 | write_lock_bh(&idev->lock); |
2652 | ||
bcdd553f | 2653 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2654 | if (!how) |
3c21edbd | 2655 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2656 | |
1da177e4 | 2657 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2658 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2659 | in6_dev_put(idev); |
2660 | ||
bcdd553f | 2661 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2662 | while (!list_empty(&idev->tempaddr_list)) { |
2663 | ifa = list_first_entry(&idev->tempaddr_list, | |
2664 | struct inet6_ifaddr, tmp_list); | |
2665 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2666 | ifa->dead = 1; |
2667 | write_unlock_bh(&idev->lock); | |
2668 | spin_lock_bh(&ifa->lock); | |
2669 | ||
2670 | if (ifa->ifpub) { | |
2671 | in6_ifa_put(ifa->ifpub); | |
2672 | ifa->ifpub = NULL; | |
2673 | } | |
2674 | spin_unlock_bh(&ifa->lock); | |
2675 | in6_ifa_put(ifa); | |
2676 | write_lock_bh(&idev->lock); | |
2677 | } | |
2678 | #endif | |
8f37ada5 | 2679 | |
502a2ffd | 2680 | while (!list_empty(&idev->addr_list)) { |
2681 | ifa = list_first_entry(&idev->addr_list, | |
2682 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2683 | addrconf_del_timer(ifa); |
2684 | ||
2685 | /* If just doing link down, and address is permanent | |
2686 | and not link-local, then retain it. */ | |
bcdd553f | 2687 | if (!how && |
84e8b803 | 2688 | (ifa->flags&IFA_F_PERMANENT) && |
2689 | !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { | |
502a2ffd | 2690 | list_move_tail(&ifa->if_list, &keep_list); |
dc2b99f7 | 2691 | |
84e8b803 | 2692 | /* If not doing DAD on this address, just keep it. */ |
2693 | if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) || | |
2694 | idev->cnf.accept_dad <= 0 || | |
2695 | (ifa->flags & IFA_F_NODAD)) | |
2696 | continue; | |
2697 | ||
2698 | /* If it was tentative already, no need to notify */ | |
2699 | if (ifa->flags & IFA_F_TENTATIVE) | |
2700 | continue; | |
2701 | ||
2702 | /* Flag it for later restoration when link comes up */ | |
2703 | ifa->flags |= IFA_F_TENTATIVE; | |
2704 | in6_ifa_hold(ifa); | |
27bdb2ab | 2705 | write_unlock_bh(&idev->lock); |
dc2b99f7 | 2706 | } else { |
502a2ffd | 2707 | list_del(&ifa->if_list); |
dc2b99f7 | 2708 | ifa->dead = 1; |
27bdb2ab | 2709 | write_unlock_bh(&idev->lock); |
1da177e4 | 2710 | |
27bdb2ab | 2711 | /* clear hash table */ |
2712 | spin_lock_bh(&addrconf_hash_lock); | |
2713 | hlist_del_init_rcu(&ifa->addr_lst); | |
27bdb2ab | 2714 | spin_unlock_bh(&addrconf_hash_lock); |
2715 | } | |
c2e21293 | 2716 | |
84e8b803 | 2717 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
8595805a | 2718 | if (ifa->dead) |
2719 | atomic_notifier_call_chain(&inet6addr_chain, | |
2720 | NETDEV_DOWN, ifa); | |
84e8b803 | 2721 | in6_ifa_put(ifa); |
dc2b99f7 | 2722 | |
84e8b803 | 2723 | write_lock_bh(&idev->lock); |
1da177e4 | 2724 | } |
8f37ada5 | 2725 | |
502a2ffd | 2726 | list_splice(&keep_list, &idev->addr_list); |
8f37ada5 | 2727 | |
1da177e4 LT |
2728 | write_unlock_bh(&idev->lock); |
2729 | ||
2730 | /* Step 5: Discard multicast list */ | |
439e2385 | 2731 | if (how) |
1da177e4 LT |
2732 | ipv6_mc_destroy_dev(idev); |
2733 | else | |
2734 | ipv6_mc_down(idev); | |
2735 | ||
1da177e4 | 2736 | idev->tstamp = jiffies; |
1ab1457c | 2737 | |
bcdd553f | 2738 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2739 | if (how) { |
408c4768 | 2740 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2741 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2742 | neigh_ifdown(&nd_tbl, dev); | |
2743 | in6_dev_put(idev); | |
2744 | } | |
2745 | return 0; | |
2746 | } | |
2747 | ||
2748 | static void addrconf_rs_timer(unsigned long data) | |
2749 | { | |
2750 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2751 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2752 | |
5b2a1953 | 2753 | read_lock(&idev->lock); |
2754 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2755 | goto out; |
2756 | ||
5b2a1953 | 2757 | if (idev->cnf.forwarding) |
2758 | goto out; | |
2759 | ||
2760 | /* Announcement received after solicitation was sent */ | |
2761 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2762 | goto out; |
1da177e4 LT |
2763 | |
2764 | spin_lock(&ifp->lock); | |
5b2a1953 | 2765 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2766 | /* The wait after the last probe can be shorter */ |
2767 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2768 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2769 | idev->cnf.rtr_solicit_delay : | |
2770 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2771 | spin_unlock(&ifp->lock); |
2772 | ||
5b2a1953 | 2773 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2774 | } else { |
2775 | spin_unlock(&ifp->lock); | |
2776 | /* | |
2777 | * Note: we do not support deprecated "all on-link" | |
2778 | * assumption any longer. | |
2779 | */ | |
2780 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
5b2a1953 | 2781 | idev->dev->name); |
1da177e4 LT |
2782 | } |
2783 | ||
2784 | out: | |
5b2a1953 | 2785 | read_unlock(&idev->lock); |
1da177e4 LT |
2786 | in6_ifa_put(ifp); |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * Duplicate Address Detection | |
2791 | */ | |
3c21edbd YH |
2792 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2793 | { | |
2794 | unsigned long rand_num; | |
2795 | struct inet6_dev *idev = ifp->idev; | |
2796 | ||
95c385b4 NH |
2797 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2798 | rand_num = 0; | |
2799 | else | |
2800 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2801 | ||
3c21edbd YH |
2802 | ifp->probes = idev->cnf.dad_transmits; |
2803 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2804 | } | |
2805 | ||
e431b8c0 | 2806 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2807 | { |
2808 | struct inet6_dev *idev = ifp->idev; | |
2809 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2810 | |
2811 | addrconf_join_solict(dev, &ifp->addr); | |
2812 | ||
1da177e4 | 2813 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2814 | |
2815 | read_lock_bh(&idev->lock); | |
2816 | if (ifp->dead) | |
2817 | goto out; | |
1da177e4 | 2818 | |
21809faf | 2819 | spin_lock(&ifp->lock); |
1da177e4 | 2820 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
1b34be74 | 2821 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2822 | !(ifp->flags&IFA_F_TENTATIVE) || |
2823 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2824 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2825 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2826 | read_unlock_bh(&idev->lock); |
2827 | ||
2828 | addrconf_dad_completed(ifp); | |
2829 | return; | |
2830 | } | |
2831 | ||
6732bade | 2832 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2833 | spin_unlock(&ifp->lock); |
6732bade | 2834 | read_unlock_bh(&idev->lock); |
3c21edbd | 2835 | /* |
590a9887 | 2836 | * If the device is not ready: |
3c21edbd YH |
2837 | * - keep it tentative if it is a permanent address. |
2838 | * - otherwise, kill it. | |
2839 | */ | |
2840 | in6_ifa_hold(ifp); | |
cc411d0b | 2841 | addrconf_dad_stop(ifp, 0); |
6732bade | 2842 | return; |
3c21edbd | 2843 | } |
95c385b4 NH |
2844 | |
2845 | /* | |
2846 | * Optimistic nodes can start receiving | |
2847 | * Frames right away | |
2848 | */ | |
e21e8467 | 2849 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
2850 | ip6_ins_rt(ifp->rt); |
2851 | ||
6732bade | 2852 | addrconf_dad_kick(ifp); |
21809faf | 2853 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2854 | out: |
2855 | read_unlock_bh(&idev->lock); | |
2856 | } | |
2857 | ||
2858 | static void addrconf_dad_timer(unsigned long data) | |
2859 | { | |
2860 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2861 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2862 | struct in6_addr mcaddr; |
2863 | ||
122e4519 | 2864 | read_lock(&idev->lock); |
2865 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2866 | read_unlock(&idev->lock); | |
1da177e4 LT |
2867 | goto out; |
2868 | } | |
21809faf | 2869 | |
2870 | spin_lock(&ifp->lock); | |
1da177e4 LT |
2871 | if (ifp->probes == 0) { |
2872 | /* | |
2873 | * DAD was successful | |
2874 | */ | |
2875 | ||
cc411d0b | 2876 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2877 | spin_unlock(&ifp->lock); |
122e4519 | 2878 | read_unlock(&idev->lock); |
1da177e4 LT |
2879 | |
2880 | addrconf_dad_completed(ifp); | |
2881 | ||
2882 | goto out; | |
2883 | } | |
2884 | ||
2885 | ifp->probes--; | |
2886 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 2887 | spin_unlock(&ifp->lock); |
122e4519 | 2888 | read_unlock(&idev->lock); |
1da177e4 LT |
2889 | |
2890 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2891 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2892 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2893 | out: |
2894 | in6_ifa_put(ifp); | |
2895 | } | |
2896 | ||
2897 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2898 | { | |
e21e8467 | 2899 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
2900 | |
2901 | /* | |
2902 | * Configure the address for reception. Now it is valid. | |
2903 | */ | |
2904 | ||
2905 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2906 | ||
2907 | /* If added prefix is link local and forwarding is off, | |
2908 | start sending router solicitations. | |
2909 | */ | |
2910 | ||
2911 | if (ifp->idev->cnf.forwarding == 0 && | |
2912 | ifp->idev->cnf.rtr_solicits > 0 && | |
2913 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2914 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2915 | /* |
2916 | * If a host as already performed a random delay | |
2917 | * [...] as part of DAD [...] there is no need | |
2918 | * to delay again before sending the first RS | |
2919 | */ | |
f3ee4010 | 2920 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2921 | |
2922 | spin_lock_bh(&ifp->lock); | |
2923 | ifp->probes = 1; | |
2924 | ifp->idev->if_flags |= IF_RS_SENT; | |
2925 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2926 | spin_unlock_bh(&ifp->lock); | |
2927 | } | |
2928 | } | |
2929 | ||
e21e8467 SH |
2930 | static void addrconf_dad_run(struct inet6_dev *idev) |
2931 | { | |
c5e33bdd YH |
2932 | struct inet6_ifaddr *ifp; |
2933 | ||
2934 | read_lock_bh(&idev->lock); | |
502a2ffd | 2935 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 2936 | spin_lock(&ifp->lock); |
c5e33bdd | 2937 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
21809faf | 2938 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2939 | continue; |
2940 | } | |
21809faf | 2941 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2942 | addrconf_dad_kick(ifp); |
2943 | } | |
2944 | read_unlock_bh(&idev->lock); | |
2945 | } | |
2946 | ||
1da177e4 LT |
2947 | #ifdef CONFIG_PROC_FS |
2948 | struct if6_iter_state { | |
3c40090a | 2949 | struct seq_net_private p; |
1da177e4 LT |
2950 | int bucket; |
2951 | }; | |
2952 | ||
2953 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2954 | { | |
2955 | struct inet6_ifaddr *ifa = NULL; | |
2956 | struct if6_iter_state *state = seq->private; | |
1218854a | 2957 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2958 | |
2959 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 2960 | struct hlist_node *n; |
5c578aed | 2961 | hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket], |
2962 | addr_lst) | |
c2e21293 | 2963 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2964 | return ifa; | |
1da177e4 | 2965 | } |
c2e21293 | 2966 | return NULL; |
1da177e4 LT |
2967 | } |
2968 | ||
c2e21293 | 2969 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
2970 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
2971 | { |
2972 | struct if6_iter_state *state = seq->private; | |
1218854a | 2973 | struct net *net = seq_file_net(seq); |
c2e21293 | 2974 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 2975 | |
5c578aed | 2976 | hlist_for_each_entry_continue_rcu(ifa, n, addr_lst) |
c2e21293 | 2977 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2978 | return ifa; | |
3c40090a | 2979 | |
c2e21293 | 2980 | while (++state->bucket < IN6_ADDR_HSIZE) { |
2981 | hlist_for_each_entry(ifa, n, | |
2982 | &inet6_addr_lst[state->bucket], addr_lst) { | |
2983 | if (net_eq(dev_net(ifa->idev->dev), net)) | |
2984 | return ifa; | |
2985 | } | |
1da177e4 | 2986 | } |
3c40090a | 2987 | |
c2e21293 | 2988 | return NULL; |
1da177e4 LT |
2989 | } |
2990 | ||
2991 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2992 | { | |
2993 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2994 | ||
2995 | if (ifa) | |
e21e8467 | 2996 | while (pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
1da177e4 LT |
2997 | --pos; |
2998 | return pos ? NULL : ifa; | |
2999 | } | |
3000 | ||
3001 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
5c578aed | 3002 | __acquires(rcu) |
1da177e4 | 3003 | { |
5c578aed | 3004 | rcu_read_lock_bh(); |
1da177e4 LT |
3005 | return if6_get_idx(seq, *pos); |
3006 | } | |
3007 | ||
3008 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3009 | { | |
3010 | struct inet6_ifaddr *ifa; | |
3011 | ||
3012 | ifa = if6_get_next(seq, v); | |
3013 | ++*pos; | |
3014 | return ifa; | |
3015 | } | |
3016 | ||
3017 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
5c578aed | 3018 | __releases(rcu) |
1da177e4 | 3019 | { |
5c578aed | 3020 | rcu_read_unlock_bh(); |
1da177e4 LT |
3021 | } |
3022 | ||
3023 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3024 | { | |
3025 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3026 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3027 | &ifp->addr, |
1da177e4 LT |
3028 | ifp->idev->dev->ifindex, |
3029 | ifp->prefix_len, | |
3030 | ifp->scope, | |
3031 | ifp->flags, | |
3032 | ifp->idev->dev->name); | |
3033 | return 0; | |
3034 | } | |
3035 | ||
56b3d975 | 3036 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3037 | .start = if6_seq_start, |
3038 | .next = if6_seq_next, | |
3039 | .show = if6_seq_show, | |
3040 | .stop = if6_seq_stop, | |
3041 | }; | |
3042 | ||
3043 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3044 | { | |
3c40090a DL |
3045 | return seq_open_net(inode, file, &if6_seq_ops, |
3046 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3047 | } |
3048 | ||
9a32144e | 3049 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3050 | .owner = THIS_MODULE, |
3051 | .open = if6_seq_open, | |
3052 | .read = seq_read, | |
3053 | .llseek = seq_lseek, | |
3c40090a | 3054 | .release = seq_release_net, |
1da177e4 LT |
3055 | }; |
3056 | ||
2c8c1e72 | 3057 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3058 | { |
3c40090a | 3059 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3060 | return -ENOMEM; |
3061 | return 0; | |
3062 | } | |
3063 | ||
2c8c1e72 | 3064 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3065 | { |
3066 | proc_net_remove(net, "if_inet6"); | |
3067 | } | |
3068 | ||
3069 | static struct pernet_operations if6_proc_net_ops = { | |
3070 | .init = if6_proc_net_init, | |
3071 | .exit = if6_proc_net_exit, | |
3072 | }; | |
3073 | ||
3074 | int __init if6_proc_init(void) | |
3075 | { | |
3076 | return register_pernet_subsys(&if6_proc_net_ops); | |
3077 | } | |
3078 | ||
1da177e4 LT |
3079 | void if6_proc_exit(void) |
3080 | { | |
3c40090a | 3081 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3082 | } |
3083 | #endif /* CONFIG_PROC_FS */ | |
3084 | ||
59fbb3a6 | 3085 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3086 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3087 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3088 | { |
3089 | int ret = 0; | |
c2e21293 | 3090 | struct inet6_ifaddr *ifp = NULL; |
3091 | struct hlist_node *n; | |
3a88a81d | 3092 | unsigned int hash = ipv6_addr_hash(addr); |
c2e21293 | 3093 | |
5c578aed | 3094 | rcu_read_lock_bh(); |
3095 | hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 3096 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3097 | continue; |
caad295f | 3098 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3099 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3100 | ret = 1; | |
3101 | break; | |
3102 | } | |
3103 | } | |
5c578aed | 3104 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3105 | return ret; |
3106 | } | |
3107 | #endif | |
3108 | ||
1da177e4 LT |
3109 | /* |
3110 | * Periodic address status verification | |
3111 | */ | |
3112 | ||
3113 | static void addrconf_verify(unsigned long foo) | |
3114 | { | |
b2db7564 | 3115 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3116 | struct inet6_ifaddr *ifp; |
c2e21293 | 3117 | struct hlist_node *node; |
1da177e4 LT |
3118 | int i; |
3119 | ||
5c578aed | 3120 | rcu_read_lock_bh(); |
3121 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3122 | now = jiffies; |
b2db7564 | 3123 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3124 | |
3125 | del_timer(&addr_chk_timer); | |
3126 | ||
bcdd553f | 3127 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3128 | restart: |
5c578aed | 3129 | hlist_for_each_entry_rcu(ifp, node, |
3130 | &inet6_addr_lst[i], addr_lst) { | |
1da177e4 | 3131 | unsigned long age; |
1da177e4 LT |
3132 | |
3133 | if (ifp->flags & IFA_F_PERMANENT) | |
3134 | continue; | |
3135 | ||
3136 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3137 | /* We try to batch several events at once. */ |
3138 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3139 | |
8f27ebb9 YH |
3140 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3141 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3142 | spin_unlock(&ifp->lock); |
3143 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3144 | ipv6_del_addr(ifp); |
3145 | goto restart; | |
8f27ebb9 YH |
3146 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3147 | spin_unlock(&ifp->lock); | |
3148 | continue; | |
1da177e4 | 3149 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3150 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3151 | int deprecate = 0; |
3152 | ||
3153 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3154 | deprecate = 1; | |
3155 | ifp->flags |= IFA_F_DEPRECATED; | |
3156 | } | |
3157 | ||
3158 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3159 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3160 | ||
3161 | spin_unlock(&ifp->lock); | |
3162 | ||
3163 | if (deprecate) { | |
3164 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3165 | |
3166 | ipv6_ifa_notify(0, ifp); | |
3167 | in6_ifa_put(ifp); | |
3168 | goto restart; | |
3169 | } | |
3170 | #ifdef CONFIG_IPV6_PRIVACY | |
3171 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3172 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3173 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3174 | ifp->idev->cnf.dad_transmits * | |
3175 | ifp->idev->nd_parms->retrans_time / HZ; | |
3176 | ||
1da177e4 LT |
3177 | if (age >= ifp->prefered_lft - regen_advance) { |
3178 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3179 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3180 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3181 | if (!ifp->regen_count && ifpub) { | |
3182 | ifp->regen_count++; | |
3183 | in6_ifa_hold(ifp); | |
3184 | in6_ifa_hold(ifpub); | |
3185 | spin_unlock(&ifp->lock); | |
5c578aed | 3186 | |
291d809b HY |
3187 | spin_lock(&ifpub->lock); |
3188 | ifpub->regen_count = 0; | |
3189 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3190 | ipv6_create_tempaddr(ifpub, ifp); |
3191 | in6_ifa_put(ifpub); | |
3192 | in6_ifa_put(ifp); | |
3193 | goto restart; | |
3194 | } | |
3195 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3196 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3197 | spin_unlock(&ifp->lock); | |
3198 | #endif | |
3199 | } else { | |
3200 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3201 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3202 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3203 | spin_unlock(&ifp->lock); | |
3204 | } | |
3205 | } | |
1da177e4 LT |
3206 | } |
3207 | ||
b2db7564 YH |
3208 | next_sec = round_jiffies_up(next); |
3209 | next_sched = next; | |
3210 | ||
3211 | /* If rounded timeout is accurate enough, accept it. */ | |
3212 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3213 | next_sched = next_sec; | |
3214 | ||
3215 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3216 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3217 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3218 | ||
3219 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3220 | now, next, next_sec, next_sched)); | |
3221 | ||
3222 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3223 | add_timer(&addr_chk_timer); |
5c578aed | 3224 | spin_unlock(&addrconf_verify_lock); |
3225 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3226 | } |
3227 | ||
461d8837 TG |
3228 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3229 | { | |
3230 | struct in6_addr *pfx = NULL; | |
3231 | ||
3232 | if (addr) | |
3233 | pfx = nla_data(addr); | |
3234 | ||
3235 | if (local) { | |
3236 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3237 | pfx = NULL; | |
3238 | else | |
3239 | pfx = nla_data(local); | |
3240 | } | |
3241 | ||
3242 | return pfx; | |
3243 | } | |
3244 | ||
ef7c79ed | 3245 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3246 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3247 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3248 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3249 | }; | |
3250 | ||
1da177e4 LT |
3251 | static int |
3252 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3253 | { | |
3b1e0a65 | 3254 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3255 | struct ifaddrmsg *ifm; |
3256 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3257 | struct in6_addr *pfx; |
b933f716 | 3258 | int err; |
1da177e4 | 3259 | |
b933f716 TG |
3260 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3261 | if (err < 0) | |
3262 | return err; | |
3263 | ||
3264 | ifm = nlmsg_data(nlh); | |
3265 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3266 | if (pfx == NULL) |
3267 | return -EINVAL; | |
3268 | ||
af284937 | 3269 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3270 | } |
3271 | ||
55ebaef1 NT |
3272 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3273 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3274 | { |
6f704992 YH |
3275 | u32 flags; |
3276 | clock_t expires; | |
4bed72e4 | 3277 | unsigned long timeout; |
46d48046 | 3278 | |
081bba5b NT |
3279 | if (!valid_lft || (prefered_lft > valid_lft)) |
3280 | return -EINVAL; | |
3281 | ||
4bed72e4 YH |
3282 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3283 | if (addrconf_finite_timeout(timeout)) { | |
3284 | expires = jiffies_to_clock_t(timeout * HZ); | |
3285 | valid_lft = timeout; | |
6f704992 | 3286 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3287 | } else { |
3288 | expires = 0; | |
3289 | flags = 0; | |
3290 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3291 | } |
081bba5b | 3292 | |
4bed72e4 YH |
3293 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3294 | if (addrconf_finite_timeout(timeout)) { | |
3295 | if (timeout == 0) | |
3296 | ifa_flags |= IFA_F_DEPRECATED; | |
3297 | prefered_lft = timeout; | |
3298 | } | |
081bba5b NT |
3299 | |
3300 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3301 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3302 | ifp->tstamp = jiffies; |
3303 | ifp->valid_lft = valid_lft; | |
3304 | ifp->prefered_lft = prefered_lft; | |
3305 | ||
3306 | spin_unlock_bh(&ifp->lock); | |
3307 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3308 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3309 | |
46d48046 | 3310 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3311 | expires, flags); |
081bba5b NT |
3312 | addrconf_verify(0); |
3313 | ||
3314 | return 0; | |
3315 | } | |
3316 | ||
1da177e4 LT |
3317 | static int |
3318 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3319 | { | |
3b1e0a65 | 3320 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3321 | struct ifaddrmsg *ifm; |
3322 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3323 | struct in6_addr *pfx; |
7198f8ce TG |
3324 | struct inet6_ifaddr *ifa; |
3325 | struct net_device *dev; | |
55ebaef1 NT |
3326 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3327 | u8 ifa_flags; | |
461d8837 | 3328 | int err; |
1da177e4 | 3329 | |
461d8837 TG |
3330 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3331 | if (err < 0) | |
3332 | return err; | |
3333 | ||
3334 | ifm = nlmsg_data(nlh); | |
3335 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3336 | if (pfx == NULL) |
3337 | return -EINVAL; | |
3338 | ||
461d8837 | 3339 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3340 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3341 | |
3342 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3343 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3344 | preferred_lft = ci->ifa_prefered; |
3345 | } else { | |
3346 | preferred_lft = INFINITY_LIFE_TIME; | |
3347 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3348 | } |
3349 | ||
af284937 | 3350 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3351 | if (dev == NULL) |
3352 | return -ENODEV; | |
3353 | ||
55ebaef1 | 3354 | /* We ignore other flags so far. */ |
3b9f9a1c | 3355 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3356 | |
1cab3da6 | 3357 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3358 | if (ifa == NULL) { |
3359 | /* | |
3360 | * It would be best to check for !NLM_F_CREATE here but | |
3361 | * userspace alreay relies on not having to provide this. | |
3362 | */ | |
af284937 DL |
3363 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3364 | ifm->ifa_prefixlen, ifa_flags, | |
3365 | preferred_lft, valid_lft); | |
081bba5b NT |
3366 | } |
3367 | ||
7198f8ce TG |
3368 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3369 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3370 | err = -EEXIST; | |
3371 | else | |
55ebaef1 | 3372 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3373 | |
3374 | in6_ifa_put(ifa); | |
3375 | ||
3376 | return err; | |
1da177e4 LT |
3377 | } |
3378 | ||
101bb229 TG |
3379 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3380 | u8 scope, int ifindex) | |
3381 | { | |
3382 | struct ifaddrmsg *ifm; | |
3383 | ||
3384 | ifm = nlmsg_data(nlh); | |
3385 | ifm->ifa_family = AF_INET6; | |
3386 | ifm->ifa_prefixlen = prefixlen; | |
3387 | ifm->ifa_flags = flags; | |
3388 | ifm->ifa_scope = scope; | |
3389 | ifm->ifa_index = ifindex; | |
3390 | } | |
3391 | ||
85486af0 TG |
3392 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3393 | unsigned long tstamp, u32 preferred, u32 valid) | |
3394 | { | |
3395 | struct ifa_cacheinfo ci; | |
3396 | ||
3397 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3398 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3399 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3400 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3401 | ci.ifa_prefered = preferred; | |
3402 | ci.ifa_valid = valid; | |
3403 | ||
3404 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3405 | } | |
3406 | ||
101bb229 TG |
3407 | static inline int rt_scope(int ifa_scope) |
3408 | { | |
3409 | if (ifa_scope & IFA_HOST) | |
3410 | return RT_SCOPE_HOST; | |
3411 | else if (ifa_scope & IFA_LINK) | |
3412 | return RT_SCOPE_LINK; | |
3413 | else if (ifa_scope & IFA_SITE) | |
3414 | return RT_SCOPE_SITE; | |
3415 | else | |
3416 | return RT_SCOPE_UNIVERSE; | |
3417 | } | |
3418 | ||
0ab6803b TG |
3419 | static inline int inet6_ifaddr_msgsize(void) |
3420 | { | |
339bf98f TG |
3421 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3422 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3423 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3424 | } |
c5396a31 | 3425 | |
1da177e4 | 3426 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3427 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3428 | { |
1da177e4 | 3429 | struct nlmsghdr *nlh; |
85486af0 | 3430 | u32 preferred, valid; |
1da177e4 | 3431 | |
0ab6803b TG |
3432 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3433 | if (nlh == NULL) | |
26932566 | 3434 | return -EMSGSIZE; |
0ab6803b | 3435 | |
101bb229 TG |
3436 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3437 | ifa->idev->dev->ifindex); | |
3438 | ||
1da177e4 | 3439 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3440 | preferred = ifa->prefered_lft; |
3441 | valid = ifa->valid_lft; | |
3442 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3443 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3444 | if (preferred > tval) |
3445 | preferred -= tval; | |
3446 | else | |
3447 | preferred = 0; | |
85486af0 TG |
3448 | if (valid != INFINITY_LIFE_TIME) |
3449 | valid -= tval; | |
1da177e4 LT |
3450 | } |
3451 | } else { | |
85486af0 TG |
3452 | preferred = INFINITY_LIFE_TIME; |
3453 | valid = INFINITY_LIFE_TIME; | |
3454 | } | |
3455 | ||
0ab6803b | 3456 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3457 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3458 | nlmsg_cancel(skb, nlh); | |
3459 | return -EMSGSIZE; | |
3460 | } | |
1da177e4 | 3461 | |
0ab6803b | 3462 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3463 | } |
3464 | ||
3465 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3466 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3467 | { |
1da177e4 | 3468 | struct nlmsghdr *nlh; |
101bb229 TG |
3469 | u8 scope = RT_SCOPE_UNIVERSE; |
3470 | int ifindex = ifmca->idev->dev->ifindex; | |
3471 | ||
3472 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3473 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3474 | |
0ab6803b TG |
3475 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3476 | if (nlh == NULL) | |
26932566 | 3477 | return -EMSGSIZE; |
85486af0 | 3478 | |
0ab6803b TG |
3479 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3480 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3481 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3482 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3483 | nlmsg_cancel(skb, nlh); | |
3484 | return -EMSGSIZE; | |
3485 | } | |
85486af0 | 3486 | |
0ab6803b | 3487 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3488 | } |
3489 | ||
3490 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3491 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3492 | { |
1da177e4 | 3493 | struct nlmsghdr *nlh; |
101bb229 TG |
3494 | u8 scope = RT_SCOPE_UNIVERSE; |
3495 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3496 | ||
3497 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3498 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3499 | |
0ab6803b TG |
3500 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3501 | if (nlh == NULL) | |
26932566 | 3502 | return -EMSGSIZE; |
85486af0 | 3503 | |
0ab6803b TG |
3504 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3505 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3506 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3507 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3508 | nlmsg_cancel(skb, nlh); | |
3509 | return -EMSGSIZE; | |
3510 | } | |
1da177e4 | 3511 | |
0ab6803b | 3512 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3513 | } |
3514 | ||
e21e8467 | 3515 | enum addr_type_t { |
1da177e4 LT |
3516 | UNICAST_ADDR, |
3517 | MULTICAST_ADDR, | |
3518 | ANYCAST_ADDR, | |
3519 | }; | |
3520 | ||
234b27c3 ED |
3521 | /* called with rcu_read_lock() */ |
3522 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3523 | struct netlink_callback *cb, enum addr_type_t type, | |
3524 | int s_ip_idx, int *p_ip_idx) | |
3525 | { | |
234b27c3 ED |
3526 | struct ifmcaddr6 *ifmca; |
3527 | struct ifacaddr6 *ifaca; | |
3528 | int err = 1; | |
3529 | int ip_idx = *p_ip_idx; | |
3530 | ||
3531 | read_lock_bh(&idev->lock); | |
3532 | switch (type) { | |
502a2ffd | 3533 | case UNICAST_ADDR: { |
3534 | struct inet6_ifaddr *ifa; | |
3535 | ||
234b27c3 | 3536 | /* unicast address incl. temp addr */ |
502a2ffd | 3537 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3538 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3539 | continue; |
3540 | err = inet6_fill_ifaddr(skb, ifa, | |
3541 | NETLINK_CB(cb->skb).pid, | |
3542 | cb->nlh->nlmsg_seq, | |
3543 | RTM_NEWADDR, | |
3544 | NLM_F_MULTI); | |
3545 | if (err <= 0) | |
3546 | break; | |
3547 | } | |
3548 | break; | |
502a2ffd | 3549 | } |
234b27c3 ED |
3550 | case MULTICAST_ADDR: |
3551 | /* multicast address */ | |
3552 | for (ifmca = idev->mc_list; ifmca; | |
3553 | ifmca = ifmca->next, ip_idx++) { | |
3554 | if (ip_idx < s_ip_idx) | |
3555 | continue; | |
3556 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3557 | NETLINK_CB(cb->skb).pid, | |
3558 | cb->nlh->nlmsg_seq, | |
3559 | RTM_GETMULTICAST, | |
3560 | NLM_F_MULTI); | |
3561 | if (err <= 0) | |
3562 | break; | |
3563 | } | |
3564 | break; | |
3565 | case ANYCAST_ADDR: | |
3566 | /* anycast address */ | |
3567 | for (ifaca = idev->ac_list; ifaca; | |
3568 | ifaca = ifaca->aca_next, ip_idx++) { | |
3569 | if (ip_idx < s_ip_idx) | |
3570 | continue; | |
3571 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3572 | NETLINK_CB(cb->skb).pid, | |
3573 | cb->nlh->nlmsg_seq, | |
3574 | RTM_GETANYCAST, | |
3575 | NLM_F_MULTI); | |
3576 | if (err <= 0) | |
3577 | break; | |
3578 | } | |
3579 | break; | |
3580 | default: | |
3581 | break; | |
3582 | } | |
3583 | read_unlock_bh(&idev->lock); | |
3584 | *p_ip_idx = ip_idx; | |
3585 | return err; | |
3586 | } | |
3587 | ||
1da177e4 LT |
3588 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3589 | enum addr_type_t type) | |
3590 | { | |
234b27c3 ED |
3591 | struct net *net = sock_net(skb->sk); |
3592 | int h, s_h; | |
1da177e4 LT |
3593 | int idx, ip_idx; |
3594 | int s_idx, s_ip_idx; | |
1da177e4 | 3595 | struct net_device *dev; |
234b27c3 ED |
3596 | struct inet6_dev *idev; |
3597 | struct hlist_head *head; | |
3598 | struct hlist_node *node; | |
1ab1457c | 3599 | |
234b27c3 ED |
3600 | s_h = cb->args[0]; |
3601 | s_idx = idx = cb->args[1]; | |
3602 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3603 | |
234b27c3 ED |
3604 | rcu_read_lock(); |
3605 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3606 | idx = 0; | |
3607 | head = &net->dev_index_head[h]; | |
3608 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3609 | if (idx < s_idx) | |
3610 | goto cont; | |
4b97efdf | 3611 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
3612 | s_ip_idx = 0; |
3613 | ip_idx = 0; | |
e21e8467 SH |
3614 | idev = __in6_dev_get(dev); |
3615 | if (!idev) | |
234b27c3 ED |
3616 | goto cont; |
3617 | ||
3618 | if (in6_dump_addrs(idev, skb, cb, type, | |
3619 | s_ip_idx, &ip_idx) <= 0) | |
3620 | goto done; | |
7562f876 | 3621 | cont: |
234b27c3 ED |
3622 | idx++; |
3623 | } | |
1da177e4 | 3624 | } |
234b27c3 ED |
3625 | done: |
3626 | rcu_read_unlock(); | |
3627 | cb->args[0] = h; | |
3628 | cb->args[1] = idx; | |
3629 | cb->args[2] = ip_idx; | |
3630 | ||
1da177e4 LT |
3631 | return skb->len; |
3632 | } | |
3633 | ||
3634 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3635 | { | |
3636 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3637 | |
1da177e4 LT |
3638 | return inet6_dump_addr(skb, cb, type); |
3639 | } | |
3640 | ||
3641 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3642 | { | |
3643 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3644 | |
1da177e4 LT |
3645 | return inet6_dump_addr(skb, cb, type); |
3646 | } | |
3647 | ||
3648 | ||
3649 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3650 | { | |
3651 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3652 | |
1da177e4 LT |
3653 | return inet6_dump_addr(skb, cb, type); |
3654 | } | |
3655 | ||
1b29fc2c TG |
3656 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3657 | void *arg) | |
6c223828 | 3658 | { |
3b1e0a65 | 3659 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3660 | struct ifaddrmsg *ifm; |
3661 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3662 | struct in6_addr *addr = NULL; |
3663 | struct net_device *dev = NULL; | |
3664 | struct inet6_ifaddr *ifa; | |
3665 | struct sk_buff *skb; | |
6c223828 NT |
3666 | int err; |
3667 | ||
1b29fc2c TG |
3668 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3669 | if (err < 0) | |
3670 | goto errout; | |
3671 | ||
3672 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3673 | if (addr == NULL) { | |
3674 | err = -EINVAL; | |
3675 | goto errout; | |
6c223828 | 3676 | } |
6c223828 | 3677 | |
1b29fc2c | 3678 | ifm = nlmsg_data(nlh); |
6c223828 | 3679 | if (ifm->ifa_index) |
6fda7350 | 3680 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3681 | |
e21e8467 SH |
3682 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3683 | if (!ifa) { | |
1b29fc2c TG |
3684 | err = -EADDRNOTAVAIL; |
3685 | goto errout; | |
3686 | } | |
6c223828 | 3687 | |
e21e8467 SH |
3688 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3689 | if (!skb) { | |
6c223828 | 3690 | err = -ENOBUFS; |
1b29fc2c | 3691 | goto errout_ifa; |
6c223828 NT |
3692 | } |
3693 | ||
6c223828 NT |
3694 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3695 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3696 | if (err < 0) { |
3697 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3698 | WARN_ON(err == -EMSGSIZE); | |
3699 | kfree_skb(skb); | |
3700 | goto errout_ifa; | |
3701 | } | |
6fda7350 | 3702 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3703 | errout_ifa: |
6c223828 | 3704 | in6_ifa_put(ifa); |
1b29fc2c | 3705 | errout: |
6c223828 | 3706 | return err; |
6c223828 NT |
3707 | } |
3708 | ||
1da177e4 LT |
3709 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3710 | { | |
3711 | struct sk_buff *skb; | |
c346dca1 | 3712 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3713 | int err = -ENOBUFS; |
1da177e4 | 3714 | |
0ab6803b | 3715 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3716 | if (skb == NULL) |
3717 | goto errout; | |
3718 | ||
3719 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3720 | if (err < 0) { |
3721 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3722 | WARN_ON(err == -EMSGSIZE); | |
3723 | kfree_skb(skb); | |
3724 | goto errout; | |
3725 | } | |
1ce85fe4 PNA |
3726 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3727 | return; | |
5d620266 TG |
3728 | errout: |
3729 | if (err < 0) | |
6fda7350 | 3730 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3731 | } |
3732 | ||
b6f99a21 | 3733 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3734 | __s32 *array, int bytes) |
3735 | { | |
04561c1f TG |
3736 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3737 | ||
1da177e4 LT |
3738 | memset(array, 0, bytes); |
3739 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3740 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3741 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3742 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3743 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3744 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3745 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3746 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3747 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3748 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3749 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3750 | #ifdef CONFIG_IPV6_PRIVACY | |
3751 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3752 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3753 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3754 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3755 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3756 | #endif | |
3757 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3758 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3759 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3760 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3761 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3762 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3763 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3764 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3765 | #endif | |
930d6ff2 | 3766 | #endif |
fbea49e1 | 3767 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3768 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3769 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3770 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3771 | #endif | |
7bc570c8 YH |
3772 | #ifdef CONFIG_IPV6_MROUTE |
3773 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3774 | #endif | |
778d80be | 3775 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3776 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3777 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3778 | } |
3779 | ||
339bf98f TG |
3780 | static inline size_t inet6_if_nlmsg_size(void) |
3781 | { | |
3782 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3783 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3784 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3785 | + nla_total_size(4) /* IFLA_MTU */ | |
3786 | + nla_total_size(4) /* IFLA_LINK */ | |
3787 | + nla_total_size( /* IFLA_PROTINFO */ | |
3788 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3789 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3790 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3791 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3792 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3793 | ); |
3794 | } | |
c5396a31 | 3795 | |
7d720c3e TH |
3796 | static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib, |
3797 | int items, int bytes) | |
7f7d9a6b HX |
3798 | { |
3799 | int i; | |
3800 | int pad = bytes - sizeof(u64) * items; | |
3801 | BUG_ON(pad < 0); | |
3802 | ||
3803 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3804 | put_unaligned(items, &stats[0]); | |
3805 | for (i = 1; i < items; i++) | |
3806 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3807 | ||
3808 | memset(&stats[items], 0, pad); | |
3809 | } | |
3810 | ||
3811 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3812 | int bytes) | |
3813 | { | |
e21e8467 | 3814 | switch (attrtype) { |
7f7d9a6b | 3815 | case IFLA_INET6_STATS: |
7d720c3e | 3816 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
7f7d9a6b HX |
3817 | break; |
3818 | case IFLA_INET6_ICMP6STATS: | |
7d720c3e | 3819 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3820 | break; |
3821 | } | |
3822 | } | |
3823 | ||
1ab1457c | 3824 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3825 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3826 | { |
04561c1f | 3827 | struct net_device *dev = idev->dev; |
bf99f1bd | 3828 | struct nlattr *nla; |
04561c1f TG |
3829 | struct ifinfomsg *hdr; |
3830 | struct nlmsghdr *nlh; | |
3831 | void *protoinfo; | |
3832 | struct ifla_cacheinfo ci; | |
3833 | ||
3834 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3835 | if (nlh == NULL) | |
26932566 | 3836 | return -EMSGSIZE; |
04561c1f TG |
3837 | |
3838 | hdr = nlmsg_data(nlh); | |
3839 | hdr->ifi_family = AF_INET6; | |
3840 | hdr->__ifi_pad = 0; | |
3841 | hdr->ifi_type = dev->type; | |
3842 | hdr->ifi_index = dev->ifindex; | |
3843 | hdr->ifi_flags = dev_get_flags(dev); | |
3844 | hdr->ifi_change = 0; | |
3845 | ||
3846 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3847 | |
3848 | if (dev->addr_len) | |
04561c1f | 3849 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3850 | |
04561c1f | 3851 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3852 | if (dev->ifindex != dev->iflink) |
04561c1f | 3853 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3854 | |
04561c1f TG |
3855 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3856 | if (protoinfo == NULL) | |
3857 | goto nla_put_failure; | |
1da177e4 | 3858 | |
04561c1f | 3859 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3860 | |
1da177e4 LT |
3861 | ci.max_reasm_len = IPV6_MAXPLEN; |
3862 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3863 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3864 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3865 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3866 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3867 | ||
bf99f1bd YH |
3868 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3869 | if (nla == NULL) | |
04561c1f | 3870 | goto nla_put_failure; |
bf99f1bd | 3871 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3872 | |
bf99f1bd YH |
3873 | /* XXX - MC not implemented */ |
3874 | ||
3875 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3876 | if (nla == NULL) | |
3877 | goto nla_put_failure; | |
3878 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3879 | ||
3880 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3881 | if (nla == NULL) | |
3882 | goto nla_put_failure; | |
3883 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3884 | |
04561c1f TG |
3885 | nla_nest_end(skb, protoinfo); |
3886 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3887 | |
04561c1f | 3888 | nla_put_failure: |
26932566 PM |
3889 | nlmsg_cancel(skb, nlh); |
3890 | return -EMSGSIZE; | |
1da177e4 LT |
3891 | } |
3892 | ||
3893 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3894 | { | |
3b1e0a65 | 3895 | struct net *net = sock_net(skb->sk); |
84d2697d | 3896 | int h, s_h; |
434a8a58 | 3897 | int idx = 0, s_idx; |
1da177e4 LT |
3898 | struct net_device *dev; |
3899 | struct inet6_dev *idev; | |
84d2697d ED |
3900 | struct hlist_head *head; |
3901 | struct hlist_node *node; | |
1da177e4 | 3902 | |
84d2697d ED |
3903 | s_h = cb->args[0]; |
3904 | s_idx = cb->args[1]; | |
3905 | ||
3906 | rcu_read_lock(); | |
3907 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3908 | idx = 0; | |
3909 | head = &net->dev_index_head[h]; | |
3910 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3911 | if (idx < s_idx) | |
3912 | goto cont; | |
3913 | idev = __in6_dev_get(dev); | |
3914 | if (!idev) | |
3915 | goto cont; | |
3916 | if (inet6_fill_ifinfo(skb, idev, | |
3917 | NETLINK_CB(cb->skb).pid, | |
3918 | cb->nlh->nlmsg_seq, | |
3919 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
3920 | goto out; | |
7562f876 | 3921 | cont: |
84d2697d ED |
3922 | idx++; |
3923 | } | |
1da177e4 | 3924 | } |
84d2697d ED |
3925 | out: |
3926 | rcu_read_unlock(); | |
3927 | cb->args[1] = idx; | |
3928 | cb->args[0] = h; | |
1da177e4 LT |
3929 | |
3930 | return skb->len; | |
3931 | } | |
3932 | ||
3933 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3934 | { | |
3935 | struct sk_buff *skb; | |
c346dca1 | 3936 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3937 | int err = -ENOBUFS; |
1ab1457c | 3938 | |
339bf98f | 3939 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3940 | if (skb == NULL) |
3941 | goto errout; | |
3942 | ||
3943 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3944 | if (err < 0) { |
3945 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3946 | WARN_ON(err == -EMSGSIZE); | |
3947 | kfree_skb(skb); | |
3948 | goto errout; | |
3949 | } | |
1ce85fe4 PNA |
3950 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3951 | return; | |
8d7a76c9 TG |
3952 | errout: |
3953 | if (err < 0) | |
6fda7350 | 3954 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3955 | } |
3956 | ||
339bf98f TG |
3957 | static inline size_t inet6_prefix_nlmsg_size(void) |
3958 | { | |
3959 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3960 | + nla_total_size(sizeof(struct in6_addr)) | |
3961 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3962 | } | |
c5396a31 | 3963 | |
1da177e4 | 3964 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3965 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3966 | int event, unsigned int flags) | |
1da177e4 | 3967 | { |
6051e2f4 TG |
3968 | struct prefixmsg *pmsg; |
3969 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3970 | struct prefix_cacheinfo ci; |
3971 | ||
6051e2f4 TG |
3972 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3973 | if (nlh == NULL) | |
26932566 | 3974 | return -EMSGSIZE; |
6051e2f4 TG |
3975 | |
3976 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3977 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3978 | pmsg->prefix_pad1 = 0; |
3979 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3980 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3981 | pmsg->prefix_len = pinfo->prefix_len; | |
3982 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3983 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3984 | pmsg->prefix_flags = 0; |
3985 | if (pinfo->onlink) | |
3986 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3987 | if (pinfo->autoconf) | |
3988 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3989 | ||
6051e2f4 | 3990 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3991 | |
3992 | ci.preferred_time = ntohl(pinfo->prefered); | |
3993 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3994 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3995 | |
6051e2f4 | 3996 | return nlmsg_end(skb, nlh); |
1da177e4 | 3997 | |
6051e2f4 | 3998 | nla_put_failure: |
26932566 PM |
3999 | nlmsg_cancel(skb, nlh); |
4000 | return -EMSGSIZE; | |
1da177e4 LT |
4001 | } |
4002 | ||
1ab1457c | 4003 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4004 | struct prefix_info *pinfo) |
4005 | { | |
4006 | struct sk_buff *skb; | |
c346dca1 | 4007 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4008 | int err = -ENOBUFS; |
1da177e4 | 4009 | |
339bf98f | 4010 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4011 | if (skb == NULL) |
4012 | goto errout; | |
4013 | ||
4014 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4015 | if (err < 0) { |
4016 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4017 | WARN_ON(err == -EMSGSIZE); | |
4018 | kfree_skb(skb); | |
4019 | goto errout; | |
4020 | } | |
1ce85fe4 PNA |
4021 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4022 | return; | |
8c384bfa TG |
4023 | errout: |
4024 | if (err < 0) | |
6fda7350 | 4025 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4026 | } |
4027 | ||
1da177e4 LT |
4028 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4029 | { | |
4030 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4031 | ||
4032 | switch (event) { | |
4033 | case RTM_NEWADDR: | |
95c385b4 NH |
4034 | /* |
4035 | * If the address was optimistic | |
4036 | * we inserted the route at the start of | |
4037 | * our DAD process, so we don't need | |
4038 | * to do it again | |
4039 | */ | |
4040 | if (!(ifp->rt->rt6i_node)) | |
4041 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4042 | if (ifp->idev->cnf.forwarding) |
4043 | addrconf_join_anycast(ifp); | |
4044 | break; | |
4045 | case RTM_DELADDR: | |
4046 | if (ifp->idev->cnf.forwarding) | |
4047 | addrconf_leave_anycast(ifp); | |
4048 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
4049 | dst_hold(&ifp->rt->u.dst); | |
93fa159a | 4050 | |
4051 | if (ifp->dead && ip6_del_rt(ifp->rt)) | |
1da177e4 | 4052 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
4053 | break; |
4054 | } | |
4055 | } | |
4056 | ||
4057 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4058 | { | |
8814c4b5 | 4059 | rcu_read_lock_bh(); |
1da177e4 LT |
4060 | if (likely(ifp->idev->dead == 0)) |
4061 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4062 | rcu_read_unlock_bh(); |
1da177e4 LT |
4063 | } |
4064 | ||
4065 | #ifdef CONFIG_SYSCTL | |
4066 | ||
4067 | static | |
8d65af78 | 4068 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4069 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4070 | { | |
4071 | int *valp = ctl->data; | |
4072 | int val = *valp; | |
88af182e | 4073 | loff_t pos = *ppos; |
1da177e4 LT |
4074 | int ret; |
4075 | ||
8d65af78 | 4076 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 | 4077 | |
c8fecf22 | 4078 | if (write) |
b325fddb | 4079 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4080 | if (ret) |
4081 | *ppos = pos; | |
1ab1457c | 4082 | return ret; |
1da177e4 LT |
4083 | } |
4084 | ||
56d417b1 BH |
4085 | static void dev_disable_change(struct inet6_dev *idev) |
4086 | { | |
4087 | if (!idev || !idev->dev) | |
4088 | return; | |
4089 | ||
4090 | if (idev->cnf.disable_ipv6) | |
4091 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4092 | else | |
4093 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4094 | } | |
4095 | ||
4096 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4097 | { | |
4098 | struct net_device *dev; | |
4099 | struct inet6_dev *idev; | |
4100 | ||
c6d14c84 ED |
4101 | rcu_read_lock(); |
4102 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4103 | idev = __in6_dev_get(dev); |
4104 | if (idev) { | |
4105 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4106 | idev->cnf.disable_ipv6 = newf; | |
4107 | if (changed) | |
4108 | dev_disable_change(idev); | |
4109 | } | |
56d417b1 | 4110 | } |
c6d14c84 | 4111 | rcu_read_unlock(); |
56d417b1 BH |
4112 | } |
4113 | ||
4114 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) | |
4115 | { | |
4116 | struct net *net; | |
4117 | ||
4118 | net = (struct net *)table->extra2; | |
4119 | ||
4120 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) | |
4121 | return 0; | |
4122 | ||
88af182e EB |
4123 | if (!rtnl_trylock()) { |
4124 | /* Restore the original values before restarting */ | |
4125 | *p = old; | |
56d417b1 | 4126 | return restart_syscall(); |
88af182e | 4127 | } |
56d417b1 BH |
4128 | |
4129 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
4130 | __s32 newf = net->ipv6.devconf_all->disable_ipv6; | |
4131 | net->ipv6.devconf_dflt->disable_ipv6 = newf; | |
4132 | addrconf_disable_change(net, newf); | |
4133 | } else if ((!*p) ^ (!old)) | |
4134 | dev_disable_change((struct inet6_dev *)table->extra1); | |
4135 | ||
4136 | rtnl_unlock(); | |
4137 | return 0; | |
4138 | } | |
4139 | ||
4140 | static | |
8d65af78 | 4141 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4142 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4143 | { | |
4144 | int *valp = ctl->data; | |
4145 | int val = *valp; | |
88af182e | 4146 | loff_t pos = *ppos; |
56d417b1 BH |
4147 | int ret; |
4148 | ||
8d65af78 | 4149 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
56d417b1 BH |
4150 | |
4151 | if (write) | |
4152 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4153 | if (ret) |
4154 | *ppos = pos; | |
56d417b1 BH |
4155 | return ret; |
4156 | } | |
4157 | ||
1da177e4 LT |
4158 | static struct addrconf_sysctl_table |
4159 | { | |
4160 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4161 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4162 | char *dev_name; |
ab32ea5d | 4163 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4164 | .sysctl_header = NULL, |
4165 | .addrconf_vars = { | |
1ab1457c | 4166 | { |
e21e8467 SH |
4167 | .procname = "forwarding", |
4168 | .data = &ipv6_devconf.forwarding, | |
4169 | .maxlen = sizeof(int), | |
4170 | .mode = 0644, | |
4171 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4172 | }, |
4173 | { | |
e21e8467 SH |
4174 | .procname = "hop_limit", |
4175 | .data = &ipv6_devconf.hop_limit, | |
4176 | .maxlen = sizeof(int), | |
4177 | .mode = 0644, | |
4178 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4179 | }, |
4180 | { | |
e21e8467 SH |
4181 | .procname = "mtu", |
4182 | .data = &ipv6_devconf.mtu6, | |
4183 | .maxlen = sizeof(int), | |
4184 | .mode = 0644, | |
4185 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4186 | }, |
4187 | { | |
e21e8467 SH |
4188 | .procname = "accept_ra", |
4189 | .data = &ipv6_devconf.accept_ra, | |
4190 | .maxlen = sizeof(int), | |
4191 | .mode = 0644, | |
4192 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4193 | }, |
4194 | { | |
e21e8467 SH |
4195 | .procname = "accept_redirects", |
4196 | .data = &ipv6_devconf.accept_redirects, | |
4197 | .maxlen = sizeof(int), | |
4198 | .mode = 0644, | |
4199 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4200 | }, |
4201 | { | |
e21e8467 SH |
4202 | .procname = "autoconf", |
4203 | .data = &ipv6_devconf.autoconf, | |
4204 | .maxlen = sizeof(int), | |
4205 | .mode = 0644, | |
4206 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4207 | }, |
4208 | { | |
e21e8467 SH |
4209 | .procname = "dad_transmits", |
4210 | .data = &ipv6_devconf.dad_transmits, | |
4211 | .maxlen = sizeof(int), | |
4212 | .mode = 0644, | |
4213 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4214 | }, |
4215 | { | |
e21e8467 SH |
4216 | .procname = "router_solicitations", |
4217 | .data = &ipv6_devconf.rtr_solicits, | |
4218 | .maxlen = sizeof(int), | |
4219 | .mode = 0644, | |
4220 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4221 | }, |
4222 | { | |
e21e8467 SH |
4223 | .procname = "router_solicitation_interval", |
4224 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4225 | .maxlen = sizeof(int), | |
4226 | .mode = 0644, | |
4227 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4228 | }, |
4229 | { | |
e21e8467 SH |
4230 | .procname = "router_solicitation_delay", |
4231 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4232 | .maxlen = sizeof(int), | |
4233 | .mode = 0644, | |
4234 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4235 | }, |
4236 | { | |
e21e8467 SH |
4237 | .procname = "force_mld_version", |
4238 | .data = &ipv6_devconf.force_mld_version, | |
4239 | .maxlen = sizeof(int), | |
4240 | .mode = 0644, | |
4241 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4242 | }, |
4243 | #ifdef CONFIG_IPV6_PRIVACY | |
4244 | { | |
e21e8467 SH |
4245 | .procname = "use_tempaddr", |
4246 | .data = &ipv6_devconf.use_tempaddr, | |
4247 | .maxlen = sizeof(int), | |
4248 | .mode = 0644, | |
4249 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4250 | }, |
4251 | { | |
e21e8467 SH |
4252 | .procname = "temp_valid_lft", |
4253 | .data = &ipv6_devconf.temp_valid_lft, | |
4254 | .maxlen = sizeof(int), | |
4255 | .mode = 0644, | |
4256 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4257 | }, |
4258 | { | |
e21e8467 SH |
4259 | .procname = "temp_prefered_lft", |
4260 | .data = &ipv6_devconf.temp_prefered_lft, | |
4261 | .maxlen = sizeof(int), | |
4262 | .mode = 0644, | |
4263 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4264 | }, |
4265 | { | |
e21e8467 SH |
4266 | .procname = "regen_max_retry", |
4267 | .data = &ipv6_devconf.regen_max_retry, | |
4268 | .maxlen = sizeof(int), | |
4269 | .mode = 0644, | |
4270 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4271 | }, |
4272 | { | |
e21e8467 SH |
4273 | .procname = "max_desync_factor", |
4274 | .data = &ipv6_devconf.max_desync_factor, | |
4275 | .maxlen = sizeof(int), | |
4276 | .mode = 0644, | |
4277 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4278 | }, |
4279 | #endif | |
4280 | { | |
e21e8467 SH |
4281 | .procname = "max_addresses", |
4282 | .data = &ipv6_devconf.max_addresses, | |
4283 | .maxlen = sizeof(int), | |
4284 | .mode = 0644, | |
4285 | .proc_handler = proc_dointvec, | |
1da177e4 | 4286 | }, |
65f5c7c1 | 4287 | { |
e21e8467 SH |
4288 | .procname = "accept_ra_defrtr", |
4289 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4290 | .maxlen = sizeof(int), | |
4291 | .mode = 0644, | |
4292 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4293 | }, |
c4fd30eb | 4294 | { |
e21e8467 SH |
4295 | .procname = "accept_ra_pinfo", |
4296 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4297 | .maxlen = sizeof(int), | |
4298 | .mode = 0644, | |
4299 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4300 | }, |
930d6ff2 YH |
4301 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4302 | { | |
e21e8467 SH |
4303 | .procname = "accept_ra_rtr_pref", |
4304 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4305 | .maxlen = sizeof(int), | |
4306 | .mode = 0644, | |
4307 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4308 | }, |
52e16356 | 4309 | { |
e21e8467 SH |
4310 | .procname = "router_probe_interval", |
4311 | .data = &ipv6_devconf.rtr_probe_interval, | |
4312 | .maxlen = sizeof(int), | |
4313 | .mode = 0644, | |
4314 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4315 | }, |
fa03ef38 | 4316 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4317 | { |
e21e8467 SH |
4318 | .procname = "accept_ra_rt_info_max_plen", |
4319 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4320 | .maxlen = sizeof(int), | |
4321 | .mode = 0644, | |
4322 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4323 | }, |
4324 | #endif | |
930d6ff2 | 4325 | #endif |
fbea49e1 | 4326 | { |
e21e8467 SH |
4327 | .procname = "proxy_ndp", |
4328 | .data = &ipv6_devconf.proxy_ndp, | |
4329 | .maxlen = sizeof(int), | |
4330 | .mode = 0644, | |
4331 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4332 | }, |
0bcbc926 | 4333 | { |
e21e8467 SH |
4334 | .procname = "accept_source_route", |
4335 | .data = &ipv6_devconf.accept_source_route, | |
4336 | .maxlen = sizeof(int), | |
4337 | .mode = 0644, | |
4338 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4339 | }, |
95c385b4 NH |
4340 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4341 | { | |
e21e8467 SH |
4342 | .procname = "optimistic_dad", |
4343 | .data = &ipv6_devconf.optimistic_dad, | |
4344 | .maxlen = sizeof(int), | |
4345 | .mode = 0644, | |
4346 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4347 | |
4348 | }, | |
7bc570c8 YH |
4349 | #endif |
4350 | #ifdef CONFIG_IPV6_MROUTE | |
4351 | { | |
e21e8467 SH |
4352 | .procname = "mc_forwarding", |
4353 | .data = &ipv6_devconf.mc_forwarding, | |
4354 | .maxlen = sizeof(int), | |
4355 | .mode = 0444, | |
4356 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4357 | }, |
95c385b4 | 4358 | #endif |
778d80be | 4359 | { |
e21e8467 SH |
4360 | .procname = "disable_ipv6", |
4361 | .data = &ipv6_devconf.disable_ipv6, | |
4362 | .maxlen = sizeof(int), | |
4363 | .mode = 0644, | |
4364 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4365 | }, |
1b34be74 | 4366 | { |
e21e8467 SH |
4367 | .procname = "accept_dad", |
4368 | .data = &ipv6_devconf.accept_dad, | |
4369 | .maxlen = sizeof(int), | |
4370 | .mode = 0644, | |
4371 | .proc_handler = proc_dointvec, | |
1b34be74 | 4372 | }, |
f7734fdf | 4373 | { |
f7734fdf OP |
4374 | .procname = "force_tllao", |
4375 | .data = &ipv6_devconf.force_tllao, | |
4376 | .maxlen = sizeof(int), | |
4377 | .mode = 0644, | |
4378 | .proc_handler = proc_dointvec | |
4379 | }, | |
1da177e4 | 4380 | { |
f8572d8f | 4381 | /* sentinel */ |
1da177e4 LT |
4382 | } |
4383 | }, | |
1da177e4 LT |
4384 | }; |
4385 | ||
bff16c2f | 4386 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4387 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4388 | { |
4389 | int i; | |
1da177e4 | 4390 | struct addrconf_sysctl_table *t; |
1da177e4 | 4391 | |
1dab6222 PE |
4392 | #define ADDRCONF_CTL_PATH_DEV 3 |
4393 | ||
4394 | struct ctl_path addrconf_ctl_path[] = { | |
f8572d8f EB |
4395 | { .procname = "net", }, |
4396 | { .procname = "ipv6", }, | |
4397 | { .procname = "conf", }, | |
1dab6222 PE |
4398 | { /* to be set */ }, |
4399 | { }, | |
4400 | }; | |
4401 | ||
4402 | ||
af879cc7 | 4403 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4404 | if (t == NULL) |
f68635e6 PE |
4405 | goto out; |
4406 | ||
bcdd553f | 4407 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4408 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4409 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4410 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4411 | } |
1da177e4 | 4412 | |
1ab1457c YH |
4413 | /* |
4414 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4415 | * by sysctl and we wouldn't want anyone to change it under our feet |
4416 | * (see SIOCSIFNAME). | |
1ab1457c | 4417 | */ |
1dab6222 PE |
4418 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4419 | if (!t->dev_name) | |
f68635e6 | 4420 | goto free; |
1da177e4 | 4421 | |
1dab6222 | 4422 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
1da177e4 | 4423 | |
bff16c2f | 4424 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4425 | t->addrconf_vars); |
1da177e4 LT |
4426 | if (t->sysctl_header == NULL) |
4427 | goto free_procname; | |
f68635e6 PE |
4428 | |
4429 | p->sysctl = t; | |
95897312 | 4430 | return 0; |
1da177e4 | 4431 | |
f68635e6 | 4432 | free_procname: |
1dab6222 | 4433 | kfree(t->dev_name); |
f68635e6 | 4434 | free: |
1da177e4 | 4435 | kfree(t); |
f68635e6 | 4436 | out: |
95897312 | 4437 | return -ENOBUFS; |
1da177e4 LT |
4438 | } |
4439 | ||
408c4768 PE |
4440 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4441 | { | |
4442 | struct addrconf_sysctl_table *t; | |
4443 | ||
4444 | if (p->sysctl == NULL) | |
4445 | return; | |
4446 | ||
4447 | t = p->sysctl; | |
4448 | p->sysctl = NULL; | |
4449 | unregister_sysctl_table(t->sysctl_header); | |
4450 | kfree(t->dev_name); | |
4451 | kfree(t); | |
4452 | } | |
4453 | ||
f52295a9 PE |
4454 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4455 | { | |
54716e3b | 4456 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4457 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4458 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4459 | idev, &idev->cnf); |
f52295a9 PE |
4460 | } |
4461 | ||
408c4768 | 4462 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4463 | { |
408c4768 PE |
4464 | __addrconf_sysctl_unregister(&idev->cnf); |
4465 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4466 | } |
4467 | ||
4468 | ||
4469 | #endif | |
4470 | ||
2c8c1e72 | 4471 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4472 | { |
4473 | int err; | |
4474 | struct ipv6_devconf *all, *dflt; | |
4475 | ||
4476 | err = -ENOMEM; | |
4477 | all = &ipv6_devconf; | |
4478 | dflt = &ipv6_devconf_dflt; | |
4479 | ||
09ad9bc7 | 4480 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4481 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4482 | if (all == NULL) | |
4483 | goto err_alloc_all; | |
4484 | ||
4485 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4486 | if (dflt == NULL) | |
4487 | goto err_alloc_dflt; | |
56d417b1 BH |
4488 | } else { |
4489 | /* these will be inherited by all namespaces */ | |
4490 | dflt->autoconf = ipv6_defaults.autoconf; | |
4491 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4492 | } |
4493 | ||
4494 | net->ipv6.devconf_all = all; | |
4495 | net->ipv6.devconf_dflt = dflt; | |
4496 | ||
4497 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4498 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4499 | if (err < 0) |
4500 | goto err_reg_all; | |
4501 | ||
f8572d8f | 4502 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4503 | if (err < 0) |
4504 | goto err_reg_dflt; | |
4505 | #endif | |
4506 | return 0; | |
4507 | ||
4508 | #ifdef CONFIG_SYSCTL | |
4509 | err_reg_dflt: | |
4510 | __addrconf_sysctl_unregister(all); | |
4511 | err_reg_all: | |
4512 | kfree(dflt); | |
4513 | #endif | |
4514 | err_alloc_dflt: | |
4515 | kfree(all); | |
4516 | err_alloc_all: | |
4517 | return err; | |
4518 | } | |
4519 | ||
2c8c1e72 | 4520 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4521 | { |
4522 | #ifdef CONFIG_SYSCTL | |
4523 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4524 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4525 | #endif | |
09ad9bc7 | 4526 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4527 | kfree(net->ipv6.devconf_dflt); |
4528 | kfree(net->ipv6.devconf_all); | |
4529 | } | |
4530 | } | |
4531 | ||
4532 | static struct pernet_operations addrconf_ops = { | |
4533 | .init = addrconf_init_net, | |
4534 | .exit = addrconf_exit_net, | |
4535 | }; | |
4536 | ||
1da177e4 LT |
4537 | /* |
4538 | * Device notifier | |
4539 | */ | |
4540 | ||
4541 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4542 | { | |
1ab1457c | 4543 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4544 | } |
7159039a YH |
4545 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4546 | ||
1da177e4 LT |
4547 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4548 | { | |
e21e8467 | 4549 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4550 | } |
7159039a YH |
4551 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4552 | ||
1da177e4 LT |
4553 | /* |
4554 | * Init / cleanup code | |
4555 | */ | |
4556 | ||
4557 | int __init addrconf_init(void) | |
4558 | { | |
c2e21293 | 4559 | int i, err; |
2a8cc6c8 | 4560 | |
e21e8467 SH |
4561 | err = ipv6_addr_label_init(); |
4562 | if (err < 0) { | |
4563 | printk(KERN_CRIT "IPv6 Addrconf:" | |
4564 | " cannot initialize default policy table: %d.\n", err); | |
2a8cc6c8 YH |
4565 | return err; |
4566 | } | |
1da177e4 | 4567 | |
e0da5a48 PE |
4568 | register_pernet_subsys(&addrconf_ops); |
4569 | ||
1da177e4 LT |
4570 | /* The addrconf netdev notifier requires that loopback_dev |
4571 | * has it's ipv6 private information allocated and setup | |
4572 | * before it can bring up and give link-local addresses | |
4573 | * to other devices which are up. | |
4574 | * | |
4575 | * Unfortunately, loopback_dev is not necessarily the first | |
4576 | * entry in the global dev_base list of net devices. In fact, | |
4577 | * it is likely to be the very last entry on that list. | |
4578 | * So this causes the notifier registry below to try and | |
4579 | * give link-local addresses to all devices besides loopback_dev | |
4580 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4581 | * devices to fail to get a link-local address. | |
4582 | * | |
4583 | * So, as a temporary fix, allocate the ipv6 structure for | |
4584 | * loopback_dev first by hand. | |
4585 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4586 | * device and it being up should be removed. | |
4587 | */ | |
4588 | rtnl_lock(); | |
2774c7ab | 4589 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4590 | err = -ENOMEM; |
4591 | rtnl_unlock(); | |
4592 | if (err) | |
e0da5a48 | 4593 | goto errlo; |
1da177e4 | 4594 | |
c2e21293 | 4595 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4596 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4597 | ||
1da177e4 LT |
4598 | register_netdevice_notifier(&ipv6_dev_notf); |
4599 | ||
1da177e4 | 4600 | addrconf_verify(0); |
c127ea2c TG |
4601 | |
4602 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4603 | if (err < 0) | |
4604 | goto errout; | |
4605 | ||
4606 | /* Only the first call to __rtnl_register can fail */ | |
4607 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4608 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4609 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4610 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4611 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4612 | ||
2a8cc6c8 YH |
4613 | ipv6_addr_label_rtnl_register(); |
4614 | ||
1da177e4 | 4615 | return 0; |
c127ea2c TG |
4616 | errout: |
4617 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4618 | errlo: |
4619 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4620 | |
4621 | return err; | |
1da177e4 LT |
4622 | } |
4623 | ||
09f7709f | 4624 | void addrconf_cleanup(void) |
1da177e4 | 4625 | { |
176c39af | 4626 | struct net_device *dev; |
1da177e4 LT |
4627 | int i; |
4628 | ||
4629 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4630 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4631 | |
4632 | rtnl_lock(); | |
4633 | ||
176c39af DL |
4634 | /* clean dev list */ |
4635 | for_each_netdev(&init_net, dev) { | |
4636 | if (__in6_dev_get(dev) == NULL) | |
4637 | continue; | |
4638 | addrconf_ifdown(dev, 1); | |
4639 | } | |
4640 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4641 | ||
1da177e4 LT |
4642 | /* |
4643 | * Check hash table. | |
4644 | */ | |
5c578aed | 4645 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4646 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4647 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4648 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4649 | |
4650 | del_timer(&addr_chk_timer); | |
1da177e4 | 4651 | rtnl_unlock(); |
1da177e4 | 4652 | } |