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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 | */ | |
0eae88f3 ED |
591 | return jhash_2words((__force u32)addr->s6_addr32[2], |
592 | (__force u32)addr->s6_addr32[3], 0) | |
3a88a81d | 593 | & (IN6_ADDR_HSIZE - 1); |
3eb84f49 YH |
594 | } |
595 | ||
1da177e4 LT |
596 | /* On success it returns ifp with increased reference count */ |
597 | ||
598 | static struct inet6_ifaddr * | |
599 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 600 | int scope, u32 flags) |
1da177e4 LT |
601 | { |
602 | struct inet6_ifaddr *ifa = NULL; | |
603 | struct rt6_info *rt; | |
3a88a81d | 604 | unsigned int hash; |
1da177e4 | 605 | int err = 0; |
d68b8270 YH |
606 | int addr_type = ipv6_addr_type(addr); |
607 | ||
608 | if (addr_type == IPV6_ADDR_ANY || | |
609 | addr_type & IPV6_ADDR_MULTICAST || | |
610 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
611 | addr_type & IPV6_ADDR_LOOPBACK)) | |
612 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 613 | |
8814c4b5 | 614 | rcu_read_lock_bh(); |
1da177e4 LT |
615 | if (idev->dead) { |
616 | err = -ENODEV; /*XXX*/ | |
617 | goto out2; | |
618 | } | |
619 | ||
56d417b1 | 620 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
621 | err = -EACCES; |
622 | goto out2; | |
623 | } | |
624 | ||
5c578aed | 625 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
626 | |
627 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 628 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
629 | ADBG(("ipv6_add_addr: already assigned\n")); |
630 | err = -EEXIST; | |
631 | goto out; | |
632 | } | |
633 | ||
322f74a4 | 634 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
635 | |
636 | if (ifa == NULL) { | |
637 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
638 | err = -ENOBUFS; | |
639 | goto out; | |
640 | } | |
641 | ||
642 | rt = addrconf_dst_alloc(idev, addr, 0); | |
643 | if (IS_ERR(rt)) { | |
644 | err = PTR_ERR(rt); | |
645 | goto out; | |
646 | } | |
647 | ||
1da177e4 LT |
648 | ipv6_addr_copy(&ifa->addr, addr); |
649 | ||
650 | spin_lock_init(&ifa->lock); | |
651 | init_timer(&ifa->timer); | |
c2e21293 | 652 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
653 | ifa->timer.data = (unsigned long) ifa; |
654 | ifa->scope = scope; | |
655 | ifa->prefix_len = pfxlen; | |
656 | ifa->flags = flags | IFA_F_TENTATIVE; | |
657 | ifa->cstamp = ifa->tstamp = jiffies; | |
658 | ||
57f5f544 KF |
659 | ifa->rt = rt; |
660 | ||
95c385b4 NH |
661 | /* |
662 | * part one of RFC 4429, section 3.3 | |
663 | * We should not configure an address as | |
664 | * optimistic if we do not yet know the link | |
665 | * layer address of our nexhop router | |
666 | */ | |
667 | ||
668 | if (rt->rt6i_nexthop == NULL) | |
669 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
670 | ||
1da177e4 LT |
671 | ifa->idev = idev; |
672 | in6_dev_hold(idev); | |
673 | /* For caller */ | |
674 | in6_ifa_hold(ifa); | |
675 | ||
676 | /* Add to big hash table */ | |
677 | hash = ipv6_addr_hash(addr); | |
678 | ||
5c578aed | 679 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 680 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
681 | |
682 | write_lock(&idev->lock); | |
683 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 684 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
685 | |
686 | #ifdef CONFIG_IPV6_PRIVACY | |
687 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 688 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
689 | in6_ifa_hold(ifa); |
690 | } | |
691 | #endif | |
692 | ||
1da177e4 LT |
693 | in6_ifa_hold(ifa); |
694 | write_unlock(&idev->lock); | |
695 | out2: | |
8814c4b5 | 696 | rcu_read_unlock_bh(); |
1da177e4 | 697 | |
fd92833a | 698 | if (likely(err == 0)) |
e041c683 | 699 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
700 | else { |
701 | kfree(ifa); | |
702 | ifa = ERR_PTR(err); | |
703 | } | |
704 | ||
705 | return ifa; | |
706 | out: | |
5c578aed | 707 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
708 | goto out2; |
709 | } | |
710 | ||
711 | /* This function wants to get referenced ifp and releases it before return */ | |
712 | ||
713 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
714 | { | |
502a2ffd | 715 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 LT |
716 | struct inet6_dev *idev = ifp->idev; |
717 | int hash; | |
718 | int deleted = 0, onlink = 0; | |
719 | unsigned long expires = jiffies; | |
720 | ||
721 | hash = ipv6_addr_hash(&ifp->addr); | |
722 | ||
723 | ifp->dead = 1; | |
724 | ||
5c578aed | 725 | spin_lock_bh(&addrconf_hash_lock); |
726 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 727 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
728 | |
729 | write_lock_bh(&idev->lock); | |
730 | #ifdef CONFIG_IPV6_PRIVACY | |
731 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 732 | list_del(&ifp->tmp_list); |
733 | if (ifp->ifpub) { | |
734 | in6_ifa_put(ifp->ifpub); | |
735 | ifp->ifpub = NULL; | |
1da177e4 | 736 | } |
372e6c8f | 737 | __in6_ifa_put(ifp); |
1da177e4 LT |
738 | } |
739 | #endif | |
740 | ||
502a2ffd | 741 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 742 | if (ifa == ifp) { |
502a2ffd | 743 | list_del_init(&ifp->if_list); |
1da177e4 | 744 | __in6_ifa_put(ifp); |
502a2ffd | 745 | |
1da177e4 LT |
746 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
747 | break; | |
748 | deleted = 1; | |
1d142804 | 749 | continue; |
1da177e4 LT |
750 | } else if (ifp->flags & IFA_F_PERMANENT) { |
751 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
752 | ifp->prefix_len)) { | |
753 | if (ifa->flags & IFA_F_PERMANENT) { | |
754 | onlink = 1; | |
755 | if (deleted) | |
756 | break; | |
757 | } else { | |
758 | unsigned long lifetime; | |
759 | ||
760 | if (!onlink) | |
761 | onlink = -1; | |
762 | ||
763 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
764 | |
765 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
766 | /* | |
767 | * Note: Because this address is | |
768 | * not permanent, lifetime < | |
769 | * LONG_MAX / HZ here. | |
770 | */ | |
1da177e4 LT |
771 | if (time_before(expires, |
772 | ifa->tstamp + lifetime * HZ)) | |
773 | expires = ifa->tstamp + lifetime * HZ; | |
774 | spin_unlock(&ifa->lock); | |
775 | } | |
776 | } | |
777 | } | |
778 | } | |
779 | write_unlock_bh(&idev->lock); | |
780 | ||
b2238566 AV |
781 | addrconf_del_timer(ifp); |
782 | ||
1da177e4 LT |
783 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
784 | ||
e041c683 | 785 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 786 | |
1da177e4 LT |
787 | /* |
788 | * Purge or update corresponding prefix | |
789 | * | |
790 | * 1) we don't purge prefix here if address was not permanent. | |
791 | * prefix is managed by its own lifetime. | |
792 | * 2) if there're no addresses, delete prefix. | |
793 | * 3) if there're still other permanent address(es), | |
794 | * corresponding prefix is still permanent. | |
795 | * 4) otherwise, update prefix lifetime to the | |
796 | * longest valid lifetime among the corresponding | |
797 | * addresses on the device. | |
798 | * Note: subsequent RA will update lifetime. | |
799 | * | |
800 | * --yoshfuji | |
801 | */ | |
802 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
803 | struct in6_addr prefix; | |
804 | struct rt6_info *rt; | |
c346dca1 | 805 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 806 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 807 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 808 | |
2b5ead46 | 809 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 810 | if (onlink == 0) { |
e0a1ad73 | 811 | ip6_del_rt(rt); |
1da177e4 LT |
812 | rt = NULL; |
813 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
814 | rt->rt6i_expires = expires; | |
815 | rt->rt6i_flags |= RTF_EXPIRES; | |
816 | } | |
817 | } | |
818 | dst_release(&rt->u.dst); | |
819 | } | |
820 | ||
821 | in6_ifa_put(ifp); | |
822 | } | |
823 | ||
824 | #ifdef CONFIG_IPV6_PRIVACY | |
825 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
826 | { | |
827 | struct inet6_dev *idev = ifp->idev; | |
828 | struct in6_addr addr, *tmpaddr; | |
829 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 830 | unsigned long regen_advance; |
1da177e4 LT |
831 | int tmp_plen; |
832 | int ret = 0; | |
833 | int max_addresses; | |
95c385b4 | 834 | u32 addr_flags; |
1da177e4 LT |
835 | |
836 | write_lock(&idev->lock); | |
837 | if (ift) { | |
838 | spin_lock_bh(&ift->lock); | |
839 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
840 | spin_unlock_bh(&ift->lock); | |
841 | tmpaddr = &addr; | |
842 | } else { | |
843 | tmpaddr = NULL; | |
844 | } | |
845 | retry: | |
846 | in6_dev_hold(idev); | |
847 | if (idev->cnf.use_tempaddr <= 0) { | |
848 | write_unlock(&idev->lock); | |
849 | printk(KERN_INFO | |
850 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
851 | in6_dev_put(idev); | |
852 | ret = -1; | |
853 | goto out; | |
854 | } | |
855 | spin_lock_bh(&ifp->lock); | |
856 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
857 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
858 | spin_unlock_bh(&ifp->lock); | |
859 | write_unlock(&idev->lock); | |
860 | printk(KERN_WARNING | |
861 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
862 | in6_dev_put(idev); | |
863 | ret = -1; | |
864 | goto out; | |
865 | } | |
866 | in6_ifa_hold(ifp); | |
867 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
868 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
869 | spin_unlock_bh(&ifp->lock); | |
870 | write_unlock(&idev->lock); | |
871 | printk(KERN_WARNING | |
872 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
873 | in6_ifa_put(ifp); | |
874 | in6_dev_put(idev); | |
875 | ret = -1; | |
876 | goto out; | |
877 | } | |
878 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
879 | tmp_valid_lft = min_t(__u32, | |
880 | ifp->valid_lft, | |
881 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
882 | tmp_prefered_lft = min_t(__u32, |
883 | ifp->prefered_lft, | |
1da177e4 LT |
884 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
885 | tmp_plen = ifp->prefix_len; | |
886 | max_addresses = idev->cnf.max_addresses; | |
887 | tmp_cstamp = ifp->cstamp; | |
888 | tmp_tstamp = ifp->tstamp; | |
889 | spin_unlock_bh(&ifp->lock); | |
890 | ||
eac55bf9 BB |
891 | regen_advance = idev->cnf.regen_max_retry * |
892 | idev->cnf.dad_transmits * | |
893 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 894 | write_unlock(&idev->lock); |
95c385b4 | 895 | |
eac55bf9 BB |
896 | /* A temporary address is created only if this calculated Preferred |
897 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
898 | * an implementation must not create a temporary address with a zero | |
899 | * Preferred Lifetime. | |
900 | */ | |
901 | if (tmp_prefered_lft <= regen_advance) { | |
902 | in6_ifa_put(ifp); | |
903 | in6_dev_put(idev); | |
904 | ret = -1; | |
905 | goto out; | |
906 | } | |
907 | ||
95c385b4 NH |
908 | addr_flags = IFA_F_TEMPORARY; |
909 | /* set in addrconf_prefix_rcv() */ | |
910 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
911 | addr_flags |= IFA_F_OPTIMISTIC; | |
912 | ||
1da177e4 | 913 | ift = !max_addresses || |
1ab1457c | 914 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 915 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
916 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
917 | addr_flags) : NULL; | |
1da177e4 LT |
918 | if (!ift || IS_ERR(ift)) { |
919 | in6_ifa_put(ifp); | |
920 | in6_dev_put(idev); | |
921 | printk(KERN_INFO | |
922 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
923 | tmpaddr = &addr; | |
924 | write_lock(&idev->lock); | |
925 | goto retry; | |
926 | } | |
927 | ||
928 | spin_lock_bh(&ift->lock); | |
929 | ift->ifpub = ifp; | |
930 | ift->valid_lft = tmp_valid_lft; | |
931 | ift->prefered_lft = tmp_prefered_lft; | |
932 | ift->cstamp = tmp_cstamp; | |
933 | ift->tstamp = tmp_tstamp; | |
934 | spin_unlock_bh(&ift->lock); | |
935 | ||
936 | addrconf_dad_start(ift, 0); | |
937 | in6_ifa_put(ift); | |
938 | in6_dev_put(idev); | |
939 | out: | |
940 | return ret; | |
941 | } | |
942 | #endif | |
943 | ||
944 | /* | |
072047e4 | 945 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 946 | */ |
a9b05723 YH |
947 | enum { |
948 | IPV6_SADDR_RULE_INIT = 0, | |
949 | IPV6_SADDR_RULE_LOCAL, | |
950 | IPV6_SADDR_RULE_SCOPE, | |
951 | IPV6_SADDR_RULE_PREFERRED, | |
952 | #ifdef CONFIG_IPV6_MIP6 | |
953 | IPV6_SADDR_RULE_HOA, | |
954 | #endif | |
955 | IPV6_SADDR_RULE_OIF, | |
956 | IPV6_SADDR_RULE_LABEL, | |
957 | #ifdef CONFIG_IPV6_PRIVACY | |
958 | IPV6_SADDR_RULE_PRIVACY, | |
959 | #endif | |
960 | IPV6_SADDR_RULE_ORCHID, | |
961 | IPV6_SADDR_RULE_PREFIX, | |
962 | IPV6_SADDR_RULE_MAX | |
963 | }; | |
964 | ||
072047e4 | 965 | struct ipv6_saddr_score { |
a9b05723 YH |
966 | int rule; |
967 | int addr_type; | |
968 | struct inet6_ifaddr *ifa; | |
969 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
970 | int scopedist; | |
971 | int matchlen; | |
072047e4 YH |
972 | }; |
973 | ||
a9b05723 | 974 | struct ipv6_saddr_dst { |
9acd9f3a | 975 | const struct in6_addr *addr; |
a9b05723 YH |
976 | int ifindex; |
977 | int scope; | |
978 | int label; | |
7cbca67c | 979 | unsigned int prefs; |
a9b05723 | 980 | }; |
072047e4 | 981 | |
b6f99a21 | 982 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 983 | { |
45bb0060 | 984 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
985 | return 1; |
986 | return 0; | |
1da177e4 LT |
987 | } |
988 | ||
3de23255 BT |
989 | static int ipv6_get_saddr_eval(struct net *net, |
990 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
991 | struct ipv6_saddr_dst *dst, |
992 | int i) | |
993 | { | |
994 | int ret; | |
995 | ||
996 | if (i <= score->rule) { | |
997 | switch (i) { | |
998 | case IPV6_SADDR_RULE_SCOPE: | |
999 | ret = score->scopedist; | |
1000 | break; | |
1001 | case IPV6_SADDR_RULE_PREFIX: | |
1002 | ret = score->matchlen; | |
1003 | break; | |
1004 | default: | |
1005 | ret = !!test_bit(i, score->scorebits); | |
1006 | } | |
1007 | goto out; | |
1008 | } | |
1009 | ||
1010 | switch (i) { | |
1011 | case IPV6_SADDR_RULE_INIT: | |
1012 | /* Rule 0: remember if hiscore is not ready yet */ | |
1013 | ret = !!score->ifa; | |
1014 | break; | |
1015 | case IPV6_SADDR_RULE_LOCAL: | |
1016 | /* Rule 1: Prefer same address */ | |
1017 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1018 | break; | |
1019 | case IPV6_SADDR_RULE_SCOPE: | |
1020 | /* Rule 2: Prefer appropriate scope | |
1021 | * | |
1022 | * ret | |
1023 | * ^ | |
1024 | * -1 | d 15 | |
1025 | * ---+--+-+---> scope | |
1026 | * | | |
1027 | * | d is scope of the destination. | |
1028 | * B-d | \ | |
1029 | * | \ <- smaller scope is better if | |
1030 | * B-15 | \ if scope is enough for destinaion. | |
1031 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1032 | * d-C-1 | / | |
1033 | * |/ <- greater is better | |
1034 | * -C / if scope is not enough for destination. | |
1035 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1036 | * | |
1037 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1038 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1039 | * Assume B = 0 and we get C > 29. | |
1040 | */ | |
1041 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1042 | if (ret >= dst->scope) | |
1043 | ret = -ret; | |
1044 | else | |
1045 | ret -= 128; /* 30 is enough */ | |
1046 | score->scopedist = ret; | |
1047 | break; | |
1048 | case IPV6_SADDR_RULE_PREFERRED: | |
1049 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1050 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1051 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1052 | break; | |
1053 | #ifdef CONFIG_IPV6_MIP6 | |
1054 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1055 | { |
a9b05723 | 1056 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1057 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1058 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1059 | break; |
7cbca67c | 1060 | } |
a9b05723 YH |
1061 | #endif |
1062 | case IPV6_SADDR_RULE_OIF: | |
1063 | /* Rule 5: Prefer outgoing interface */ | |
1064 | ret = (!dst->ifindex || | |
1065 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1066 | break; | |
1067 | case IPV6_SADDR_RULE_LABEL: | |
1068 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1069 | ret = ipv6_addr_label(net, |
1070 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1071 | score->ifa->idev->dev->ifindex) == dst->label; |
1072 | break; | |
1073 | #ifdef CONFIG_IPV6_PRIVACY | |
1074 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1075 | { |
a9b05723 YH |
1076 | /* Rule 7: Prefer public address |
1077 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1078 | */ | |
7cbca67c YH |
1079 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1080 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1081 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1082 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1083 | break; |
7cbca67c | 1084 | } |
a9b05723 YH |
1085 | #endif |
1086 | case IPV6_SADDR_RULE_ORCHID: | |
1087 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1088 | * non-ORCHID vs non-ORCHID | |
1089 | */ | |
1090 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1091 | ipv6_addr_orchid(dst->addr)); | |
1092 | break; | |
1093 | case IPV6_SADDR_RULE_PREFIX: | |
1094 | /* Rule 8: Use longest matching prefix */ | |
1095 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1096 | dst->addr); | |
1097 | break; | |
1098 | default: | |
1099 | ret = 0; | |
1100 | } | |
1101 | ||
1102 | if (ret) | |
1103 | __set_bit(i, score->scorebits); | |
1104 | score->rule = i; | |
1105 | out: | |
1106 | return ret; | |
1107 | } | |
1108 | ||
191cd582 | 1109 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1110 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1111 | struct in6_addr *saddr) |
1da177e4 | 1112 | { |
a9b05723 YH |
1113 | struct ipv6_saddr_score scores[2], |
1114 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1115 | struct ipv6_saddr_dst dst; |
072047e4 | 1116 | struct net_device *dev; |
a9b05723 | 1117 | int dst_type; |
1da177e4 | 1118 | |
a9b05723 YH |
1119 | dst_type = __ipv6_addr_type(daddr); |
1120 | dst.addr = daddr; | |
1121 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1122 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1123 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1124 | dst.prefs = prefs; |
a9b05723 YH |
1125 | |
1126 | hiscore->rule = -1; | |
1127 | hiscore->ifa = NULL; | |
1da177e4 | 1128 | |
8814c4b5 | 1129 | rcu_read_lock(); |
1da177e4 | 1130 | |
c6d14c84 | 1131 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1132 | struct inet6_dev *idev; |
072047e4 | 1133 | |
a9b05723 | 1134 | /* Candidate Source Address (section 4) |
072047e4 YH |
1135 | * - multicast and link-local destination address, |
1136 | * the set of candidate source address MUST only | |
1137 | * include addresses assigned to interfaces | |
1138 | * belonging to the same link as the outgoing | |
1139 | * interface. | |
1140 | * (- For site-local destination addresses, the | |
1141 | * set of candidate source addresses MUST only | |
1142 | * include addresses assigned to interfaces | |
1143 | * belonging to the same site as the outgoing | |
1144 | * interface.) | |
1145 | */ | |
a9b05723 YH |
1146 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1147 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1148 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1149 | continue; |
1da177e4 | 1150 | |
1da177e4 | 1151 | idev = __in6_dev_get(dev); |
072047e4 YH |
1152 | if (!idev) |
1153 | continue; | |
1154 | ||
1155 | read_lock_bh(&idev->lock); | |
502a2ffd | 1156 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1157 | int i; |
072047e4 | 1158 | |
a9b05723 | 1159 | /* |
6b3ae80a YH |
1160 | * - Tentative Address (RFC2462 section 5.4) |
1161 | * - A tentative address is not considered | |
1162 | * "assigned to an interface" in the traditional | |
95c385b4 | 1163 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1164 | * - Candidate Source Address (section 4) |
072047e4 YH |
1165 | * - In any case, anycast addresses, multicast |
1166 | * addresses, and the unspecified address MUST | |
1167 | * NOT be included in a candidate set. | |
1168 | */ | |
a9b05723 YH |
1169 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1170 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1171 | continue; |
a9b05723 YH |
1172 | |
1173 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1174 | ||
1175 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1176 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1177 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1178 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1179 | "assigned as unicast address on %s", |
1180 | dev->name); | |
1181 | continue; | |
1182 | } | |
1183 | ||
a9b05723 YH |
1184 | score->rule = -1; |
1185 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1186 | ||
1187 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1188 | int minihiscore, miniscore; | |
1189 | ||
3de23255 BT |
1190 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1191 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1192 | |
1193 | if (minihiscore > miniscore) { | |
1194 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1195 | score->scopedist > 0) { | |
1196 | /* | |
1197 | * special case: | |
1198 | * each remaining entry | |
1199 | * has too small (not enough) | |
1200 | * scope, because ifa entries | |
1201 | * are sorted by their scope | |
1202 | * values. | |
1203 | */ | |
1204 | goto try_nextdev; | |
1205 | } | |
1206 | break; | |
1207 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1208 | if (hiscore->ifa) |
1209 | in6_ifa_put(hiscore->ifa); | |
1210 | ||
1211 | in6_ifa_hold(score->ifa); | |
1212 | ||
a0bffffc | 1213 | swap(hiscore, score); |
a9b05723 YH |
1214 | |
1215 | /* restore our iterator */ | |
1216 | score->ifa = hiscore->ifa; | |
1217 | ||
1218 | break; | |
1da177e4 | 1219 | } |
072047e4 | 1220 | } |
1da177e4 | 1221 | } |
a9b05723 | 1222 | try_nextdev: |
072047e4 | 1223 | read_unlock_bh(&idev->lock); |
1da177e4 | 1224 | } |
8814c4b5 | 1225 | rcu_read_unlock(); |
1da177e4 | 1226 | |
a9b05723 | 1227 | if (!hiscore->ifa) |
072047e4 | 1228 | return -EADDRNOTAVAIL; |
1ab1457c | 1229 | |
a9b05723 YH |
1230 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1231 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1232 | return 0; |
1da177e4 | 1233 | } |
5e5f3f0f | 1234 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1235 | |
95c385b4 NH |
1236 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1237 | unsigned char banned_flags) | |
1da177e4 LT |
1238 | { |
1239 | struct inet6_dev *idev; | |
1240 | int err = -EADDRNOTAVAIL; | |
1241 | ||
8814c4b5 | 1242 | rcu_read_lock(); |
e21e8467 SH |
1243 | idev = __in6_dev_get(dev); |
1244 | if (idev) { | |
1da177e4 LT |
1245 | struct inet6_ifaddr *ifp; |
1246 | ||
1247 | read_lock_bh(&idev->lock); | |
502a2ffd | 1248 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1249 | if (ifp->scope == IFA_LINK && | |
1250 | !(ifp->flags & banned_flags)) { | |
1da177e4 LT |
1251 | ipv6_addr_copy(addr, &ifp->addr); |
1252 | err = 0; | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | read_unlock_bh(&idev->lock); | |
1257 | } | |
8814c4b5 | 1258 | rcu_read_unlock(); |
1da177e4 LT |
1259 | return err; |
1260 | } | |
1261 | ||
1262 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1263 | { | |
1264 | int cnt = 0; | |
1265 | struct inet6_ifaddr *ifp; | |
1266 | ||
1267 | read_lock_bh(&idev->lock); | |
502a2ffd | 1268 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1269 | cnt++; |
1270 | read_unlock_bh(&idev->lock); | |
1271 | return cnt; | |
1272 | } | |
1273 | ||
bfeade08 DL |
1274 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1275 | struct net_device *dev, int strict) | |
1da177e4 | 1276 | { |
c2e21293 | 1277 | struct inet6_ifaddr *ifp = NULL; |
1278 | struct hlist_node *node; | |
3a88a81d | 1279 | unsigned int hash = ipv6_addr_hash(addr); |
1da177e4 | 1280 | |
5c578aed | 1281 | rcu_read_lock_bh(); |
1282 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1283 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1284 | continue; |
1da177e4 LT |
1285 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1286 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1287 | if (dev == NULL || ifp->idev->dev == dev || | |
1288 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1289 | break; | |
1290 | } | |
1291 | } | |
5c578aed | 1292 | rcu_read_unlock_bh(); |
1293 | ||
1da177e4 LT |
1294 | return ifp != NULL; |
1295 | } | |
7159039a YH |
1296 | EXPORT_SYMBOL(ipv6_chk_addr); |
1297 | ||
3e81c6da DM |
1298 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1299 | struct net_device *dev) | |
1da177e4 | 1300 | { |
3e81c6da | 1301 | unsigned int hash = ipv6_addr_hash(addr); |
c2e21293 | 1302 | struct inet6_ifaddr *ifp; |
1303 | struct hlist_node *node; | |
1da177e4 | 1304 | |
c2e21293 | 1305 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1306 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1307 | continue; |
1da177e4 LT |
1308 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1309 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1310 | return true; |
1da177e4 LT |
1311 | } |
1312 | } | |
3e81c6da | 1313 | return false; |
1da177e4 LT |
1314 | } |
1315 | ||
52eeeb84 YH |
1316 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1317 | { | |
1318 | struct inet6_dev *idev; | |
1319 | struct inet6_ifaddr *ifa; | |
1320 | int onlink; | |
1321 | ||
1322 | onlink = 0; | |
1323 | rcu_read_lock(); | |
1324 | idev = __in6_dev_get(dev); | |
1325 | if (idev) { | |
1326 | read_lock_bh(&idev->lock); | |
502a2ffd | 1327 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1328 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1329 | ifa->prefix_len); | |
1330 | if (onlink) | |
1331 | break; | |
1332 | } | |
1333 | read_unlock_bh(&idev->lock); | |
1334 | } | |
1335 | rcu_read_unlock(); | |
1336 | return onlink; | |
1337 | } | |
1338 | ||
1339 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1340 | ||
9acd9f3a | 1341 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1342 | struct net_device *dev, int strict) |
1da177e4 | 1343 | { |
b79d1d54 | 1344 | struct inet6_ifaddr *ifp, *result = NULL; |
3a88a81d | 1345 | unsigned int hash = ipv6_addr_hash(addr); |
b79d1d54 | 1346 | struct hlist_node *node; |
1da177e4 | 1347 | |
5c578aed | 1348 | rcu_read_lock_bh(); |
1349 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1350 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1351 | continue; |
1da177e4 LT |
1352 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1353 | if (dev == NULL || ifp->idev->dev == dev || | |
1354 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1355 | result = ifp; |
1da177e4 LT |
1356 | in6_ifa_hold(ifp); |
1357 | break; | |
1358 | } | |
1359 | } | |
1360 | } | |
5c578aed | 1361 | rcu_read_unlock_bh(); |
1da177e4 | 1362 | |
b79d1d54 | 1363 | return result; |
1da177e4 LT |
1364 | } |
1365 | ||
1da177e4 LT |
1366 | /* Gets referenced address, destroys ifaddr */ |
1367 | ||
cc411d0b | 1368 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1369 | { |
1da177e4 LT |
1370 | if (ifp->flags&IFA_F_PERMANENT) { |
1371 | spin_lock_bh(&ifp->lock); | |
1372 | addrconf_del_timer(ifp); | |
1373 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1374 | if (dad_failed) |
1375 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1376 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1377 | if (dad_failed) |
1378 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1379 | in6_ifa_put(ifp); |
1380 | #ifdef CONFIG_IPV6_PRIVACY | |
1381 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1382 | struct inet6_ifaddr *ifpub; | |
1383 | spin_lock_bh(&ifp->lock); | |
1384 | ifpub = ifp->ifpub; | |
1385 | if (ifpub) { | |
1386 | in6_ifa_hold(ifpub); | |
1387 | spin_unlock_bh(&ifp->lock); | |
1388 | ipv6_create_tempaddr(ifpub, ifp); | |
1389 | in6_ifa_put(ifpub); | |
1390 | } else { | |
1391 | spin_unlock_bh(&ifp->lock); | |
1392 | } | |
1393 | ipv6_del_addr(ifp); | |
1394 | #endif | |
1395 | } else | |
1396 | ipv6_del_addr(ifp); | |
1397 | } | |
1398 | ||
3c21edbd YH |
1399 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1400 | { | |
1b34be74 | 1401 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 BH |
1402 | |
1403 | if (net_ratelimit()) | |
0522fea6 JR |
1404 | printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |
1405 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1406 | |
1b34be74 YH |
1407 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1408 | struct in6_addr addr; | |
1409 | ||
1410 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1411 | addr.s6_addr32[1] = 0; | |
1412 | ||
1413 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1414 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1415 | /* DAD failed for link-local based on MAC address */ | |
1416 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 BH |
1417 | |
1418 | printk(KERN_INFO "%s: IPv6 being disabled!\n", | |
1419 | ifp->idev->dev->name); | |
1b34be74 YH |
1420 | } |
1421 | } | |
1422 | ||
cc411d0b | 1423 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1424 | } |
1da177e4 LT |
1425 | |
1426 | /* Join to solicited addr multicast group. */ | |
1427 | ||
1428 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1429 | { | |
1430 | struct in6_addr maddr; | |
1431 | ||
1432 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1433 | return; | |
1434 | ||
1435 | addrconf_addr_solict_mult(addr, &maddr); | |
1436 | ipv6_dev_mc_inc(dev, &maddr); | |
1437 | } | |
1438 | ||
1439 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1440 | { | |
1441 | struct in6_addr maddr; | |
1442 | ||
1443 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1444 | return; | |
1445 | ||
1446 | addrconf_addr_solict_mult(addr, &maddr); | |
1447 | __ipv6_dev_mc_dec(idev, &maddr); | |
1448 | } | |
1449 | ||
20380731 | 1450 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1451 | { |
1452 | struct in6_addr addr; | |
1453 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1454 | if (ipv6_addr_any(&addr)) | |
1455 | return; | |
1456 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1457 | } | |
1458 | ||
20380731 | 1459 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1460 | { |
1461 | struct in6_addr addr; | |
1462 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1463 | if (ipv6_addr_any(&addr)) | |
1464 | return; | |
1465 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1466 | } | |
1467 | ||
073a8e0e YH |
1468 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1469 | { | |
1470 | if (dev->addr_len != ETH_ALEN) | |
1471 | return -1; | |
1472 | memcpy(eui, dev->dev_addr, 3); | |
1473 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1474 | ||
1475 | /* | |
1476 | * The zSeries OSA network cards can be shared among various | |
1477 | * OS instances, but the OSA cards have only one MAC address. | |
1478 | * This leads to duplicate address conflicts in conjunction | |
1479 | * with IPv6 if more than one instance uses the same card. | |
1480 | * | |
1481 | * The driver for these cards can deliver a unique 16-bit | |
1482 | * identifier for each instance sharing the same card. It is | |
1483 | * placed instead of 0xFFFE in the interface identifier. The | |
1484 | * "u" bit of the interface identifier is not inverted in this | |
1485 | * case. Hence the resulting interface identifier has local | |
1486 | * scope according to RFC2373. | |
1487 | */ | |
1488 | if (dev->dev_id) { | |
1489 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1490 | eui[4] = dev->dev_id & 0xFF; | |
1491 | } else { | |
1492 | eui[3] = 0xFF; | |
1493 | eui[4] = 0xFE; | |
1494 | eui[0] ^= 2; | |
1495 | } | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1500 | { | |
1501 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1502 | if (dev->addr_len != ARCNET_ALEN) | |
1503 | return -1; | |
1504 | memset(eui, 0, 7); | |
1505 | eui[7] = *(u8*)dev->dev_addr; | |
1506 | return 0; | |
1507 | } | |
1508 | ||
1509 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1510 | { | |
1511 | if (dev->addr_len != INFINIBAND_ALEN) | |
1512 | return -1; | |
1513 | memcpy(eui, dev->dev_addr + 12, 8); | |
1514 | eui[0] |= 2; | |
1515 | return 0; | |
1516 | } | |
1517 | ||
dfd982ba YH |
1518 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1519 | { | |
9af28511 SH |
1520 | if (addr == 0) |
1521 | return -1; | |
dfd982ba YH |
1522 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1523 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1524 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1525 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1526 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1527 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1528 | eui[1] = 0; | |
1529 | eui[2] = 0x5E; | |
1530 | eui[3] = 0xFE; | |
1531 | memcpy(eui + 4, &addr, 4); | |
1532 | return 0; | |
1533 | } | |
1534 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1535 | ||
1536 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1537 | { | |
1538 | if (dev->priv_flags & IFF_ISATAP) | |
1539 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1540 | return -1; | |
1541 | } | |
1542 | ||
1da177e4 LT |
1543 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1544 | { | |
1545 | switch (dev->type) { | |
1546 | case ARPHRD_ETHER: | |
1547 | case ARPHRD_FDDI: | |
1548 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1549 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1550 | case ARPHRD_ARCNET: |
073a8e0e | 1551 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1552 | case ARPHRD_INFINIBAND: |
073a8e0e | 1553 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1554 | case ARPHRD_SIT: |
dfd982ba | 1555 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1556 | } |
1557 | return -1; | |
1558 | } | |
1559 | ||
1560 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1561 | { | |
1562 | int err = -1; | |
1563 | struct inet6_ifaddr *ifp; | |
1564 | ||
1565 | read_lock_bh(&idev->lock); | |
502a2ffd | 1566 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1567 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1568 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1569 | err = 0; | |
1570 | break; | |
1571 | } | |
1572 | } | |
1573 | read_unlock_bh(&idev->lock); | |
1574 | return err; | |
1575 | } | |
1576 | ||
1577 | #ifdef CONFIG_IPV6_PRIVACY | |
1578 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1579 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1580 | { | |
1da177e4 | 1581 | regen: |
955189ef | 1582 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1583 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1584 | |
1585 | /* | |
1586 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1587 | * check if generated address is not inappropriate | |
1588 | * | |
1589 | * - Reserved subnet anycast (RFC 2526) | |
1590 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1591 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1592 | * 00-00-5E-FE-xx-xx-xx-xx |
1593 | * - value 0 | |
1594 | * - XXX: already assigned to an address on the device | |
1595 | */ | |
1ab1457c | 1596 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1597 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1598 | (idev->rndid[7]&0x80)) | |
1599 | goto regen; | |
1600 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1601 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1602 | goto regen; | |
1603 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1604 | goto regen; | |
1605 | } | |
1606 | ||
1607 | return 0; | |
1608 | } | |
1609 | ||
1610 | static void ipv6_regen_rndid(unsigned long data) | |
1611 | { | |
1612 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1613 | unsigned long expires; | |
1614 | ||
8814c4b5 | 1615 | rcu_read_lock_bh(); |
1da177e4 LT |
1616 | write_lock_bh(&idev->lock); |
1617 | ||
1618 | if (idev->dead) | |
1619 | goto out; | |
1620 | ||
1621 | if (__ipv6_regen_rndid(idev) < 0) | |
1622 | goto out; | |
1ab1457c | 1623 | |
1da177e4 | 1624 | expires = jiffies + |
1ab1457c | 1625 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1626 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1627 | if (time_before(expires, jiffies)) { | |
1628 | printk(KERN_WARNING | |
1629 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1630 | idev->dev->name); | |
1631 | goto out; | |
1632 | } | |
1633 | ||
1634 | if (!mod_timer(&idev->regen_timer, expires)) | |
1635 | in6_dev_hold(idev); | |
1636 | ||
1637 | out: | |
1638 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1639 | rcu_read_unlock_bh(); |
1da177e4 LT |
1640 | in6_dev_put(idev); |
1641 | } | |
1642 | ||
1643 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1644 | int ret = 0; | |
1645 | ||
1646 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1647 | ret = __ipv6_regen_rndid(idev); | |
1648 | return ret; | |
1649 | } | |
1650 | #endif | |
1651 | ||
1652 | /* | |
1653 | * Add prefix route. | |
1654 | */ | |
1655 | ||
1656 | static void | |
1657 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1658 | unsigned long expires, u32 flags) |
1da177e4 | 1659 | { |
86872cb5 TG |
1660 | struct fib6_config cfg = { |
1661 | .fc_table = RT6_TABLE_PREFIX, | |
1662 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1663 | .fc_ifindex = dev->ifindex, | |
1664 | .fc_expires = expires, | |
1665 | .fc_dst_len = plen, | |
1666 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1667 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1668 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1669 | }; |
1da177e4 | 1670 | |
86872cb5 | 1671 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1672 | |
1673 | /* Prevent useless cloning on PtP SIT. | |
1674 | This thing is done here expecting that the whole | |
1675 | class of non-broadcast devices need not cloning. | |
1676 | */ | |
0be669bb | 1677 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1678 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1679 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1680 | #endif |
1da177e4 | 1681 | |
86872cb5 | 1682 | ip6_route_add(&cfg); |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | /* Create "default" multicast route to the interface */ | |
1686 | ||
1687 | static void addrconf_add_mroute(struct net_device *dev) | |
1688 | { | |
86872cb5 TG |
1689 | struct fib6_config cfg = { |
1690 | .fc_table = RT6_TABLE_LOCAL, | |
1691 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1692 | .fc_ifindex = dev->ifindex, | |
1693 | .fc_dst_len = 8, | |
1694 | .fc_flags = RTF_UP, | |
c346dca1 | 1695 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1696 | }; |
1697 | ||
1698 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1699 | ||
1700 | ip6_route_add(&cfg); | |
1da177e4 LT |
1701 | } |
1702 | ||
0be669bb | 1703 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1704 | static void sit_route_add(struct net_device *dev) |
1705 | { | |
86872cb5 TG |
1706 | struct fib6_config cfg = { |
1707 | .fc_table = RT6_TABLE_MAIN, | |
1708 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1709 | .fc_ifindex = dev->ifindex, | |
1710 | .fc_dst_len = 96, | |
1711 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1712 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1713 | }; |
1da177e4 LT |
1714 | |
1715 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1716 | ip6_route_add(&cfg); |
1da177e4 | 1717 | } |
0be669bb | 1718 | #endif |
1da177e4 LT |
1719 | |
1720 | static void addrconf_add_lroute(struct net_device *dev) | |
1721 | { | |
1722 | struct in6_addr addr; | |
1723 | ||
1724 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1725 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1726 | } | |
1727 | ||
1728 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1729 | { | |
1730 | struct inet6_dev *idev; | |
1731 | ||
1732 | ASSERT_RTNL(); | |
1733 | ||
e21e8467 SH |
1734 | idev = ipv6_find_idev(dev); |
1735 | if (!idev) | |
1da177e4 LT |
1736 | return NULL; |
1737 | ||
1738 | /* Add default multicast route */ | |
1739 | addrconf_add_mroute(dev); | |
1740 | ||
1741 | /* Add link local route */ | |
1742 | addrconf_add_lroute(dev); | |
1743 | return idev; | |
1744 | } | |
1745 | ||
1746 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1747 | { | |
1748 | struct prefix_info *pinfo; | |
1749 | __u32 valid_lft; | |
1750 | __u32 prefered_lft; | |
1751 | int addr_type; | |
1da177e4 | 1752 | struct inet6_dev *in6_dev; |
56d417b1 | 1753 | struct net *net = dev_net(dev); |
1da177e4 LT |
1754 | |
1755 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1756 | |
1da177e4 LT |
1757 | if (len < sizeof(struct prefix_info)) { |
1758 | ADBG(("addrconf: prefix option too short\n")); | |
1759 | return; | |
1760 | } | |
1ab1457c | 1761 | |
1da177e4 LT |
1762 | /* |
1763 | * Validation checks ([ADDRCONF], page 19) | |
1764 | */ | |
1765 | ||
1766 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1767 | ||
1768 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1769 | return; | |
1770 | ||
1771 | valid_lft = ntohl(pinfo->valid); | |
1772 | prefered_lft = ntohl(pinfo->prefered); | |
1773 | ||
1774 | if (prefered_lft > valid_lft) { | |
1775 | if (net_ratelimit()) | |
1776 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1777 | return; | |
1778 | } | |
1779 | ||
1780 | in6_dev = in6_dev_get(dev); | |
1781 | ||
1782 | if (in6_dev == NULL) { | |
1783 | if (net_ratelimit()) | |
1784 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * Two things going on here: | |
1790 | * 1) Add routes for on-link prefixes | |
1791 | * 2) Configure prefixes with the auto flag set | |
1792 | */ | |
1793 | ||
4bed72e4 YH |
1794 | if (pinfo->onlink) { |
1795 | struct rt6_info *rt; | |
1796 | unsigned long rt_expires; | |
1797 | ||
6f704992 YH |
1798 | /* Avoid arithmetic overflow. Really, we could |
1799 | * save rt_expires in seconds, likely valid_lft, | |
1800 | * but it would require division in fib gc, that it | |
1801 | * not good. | |
1802 | */ | |
4bed72e4 YH |
1803 | if (HZ > USER_HZ) |
1804 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1805 | else | |
1806 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1807 | |
4bed72e4 YH |
1808 | if (addrconf_finite_timeout(rt_expires)) |
1809 | rt_expires *= HZ; | |
1da177e4 | 1810 | |
56d417b1 | 1811 | rt = rt6_lookup(net, &pinfo->prefix, NULL, |
6fda7350 | 1812 | dev->ifindex, 1); |
1da177e4 | 1813 | |
2b5ead46 | 1814 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1815 | /* Autoconf prefix route */ |
1816 | if (valid_lft == 0) { | |
1817 | ip6_del_rt(rt); | |
1818 | rt = NULL; | |
4bed72e4 | 1819 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1820 | /* not infinity */ |
1821 | rt->rt6i_expires = jiffies + rt_expires; | |
1822 | rt->rt6i_flags |= RTF_EXPIRES; | |
1823 | } else { | |
1824 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1825 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1826 | } |
1827 | } else if (valid_lft) { | |
6f704992 | 1828 | clock_t expires = 0; |
4bed72e4 YH |
1829 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1830 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1831 | /* not infinity */ |
1832 | flags |= RTF_EXPIRES; | |
1833 | expires = jiffies_to_clock_t(rt_expires); | |
1834 | } | |
1da177e4 | 1835 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1836 | dev, expires, flags); |
1da177e4 LT |
1837 | } |
1838 | if (rt) | |
1839 | dst_release(&rt->u.dst); | |
1840 | } | |
1841 | ||
1842 | /* Try to figure out our local address for this prefix */ | |
1843 | ||
1844 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1845 | struct inet6_ifaddr * ifp; | |
1846 | struct in6_addr addr; | |
1847 | int create = 0, update_lft = 0; | |
1848 | ||
1849 | if (pinfo->prefix_len == 64) { | |
1850 | memcpy(&addr, &pinfo->prefix, 8); | |
1851 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1852 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1853 | in6_dev_put(in6_dev); | |
1854 | return; | |
1855 | } | |
1856 | goto ok; | |
1857 | } | |
1858 | if (net_ratelimit()) | |
1859 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1860 | pinfo->prefix_len); | |
1861 | in6_dev_put(in6_dev); | |
1862 | return; | |
1863 | ||
1864 | ok: | |
1865 | ||
53b7997f | 1866 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1867 | |
1868 | if (ifp == NULL && valid_lft) { | |
1869 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1870 | u32 addr_flags = 0; |
1871 | ||
1872 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1873 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1874 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1875 | addr_flags = IFA_F_OPTIMISTIC; |
1876 | #endif | |
1da177e4 LT |
1877 | |
1878 | /* Do not allow to create too much of autoconfigured | |
1879 | * addresses; this would be too easy way to crash kernel. | |
1880 | */ | |
1881 | if (!max_addresses || | |
1882 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1883 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1884 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1885 | addr_flags); | |
1da177e4 LT |
1886 | |
1887 | if (!ifp || IS_ERR(ifp)) { | |
1888 | in6_dev_put(in6_dev); | |
1889 | return; | |
1890 | } | |
1891 | ||
1892 | update_lft = create = 1; | |
1893 | ifp->cstamp = jiffies; | |
1894 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1895 | } | |
1896 | ||
1897 | if (ifp) { | |
1898 | int flags; | |
1899 | unsigned long now; | |
1900 | #ifdef CONFIG_IPV6_PRIVACY | |
1901 | struct inet6_ifaddr *ift; | |
1902 | #endif | |
1903 | u32 stored_lft; | |
1904 | ||
1905 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1906 | spin_lock(&ifp->lock); | |
1907 | now = jiffies; | |
1908 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1909 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1910 | else | |
1911 | stored_lft = 0; | |
1912 | if (!update_lft && stored_lft) { | |
1913 | if (valid_lft > MIN_VALID_LIFETIME || | |
1914 | valid_lft > stored_lft) | |
1915 | update_lft = 1; | |
1916 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1917 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1918 | /* |
1919 | * RFC 4862 Section 5.5.3e: | |
1920 | * "Note that the preferred lifetime of | |
1921 | * the corresponding address is always | |
1922 | * reset to the Preferred Lifetime in | |
1923 | * the received Prefix Information | |
1924 | * option, regardless of whether the | |
1925 | * valid lifetime is also reset or | |
1926 | * ignored." | |
1927 | * | |
1928 | * So if the preferred lifetime in | |
1929 | * this advertisement is different | |
1930 | * than what we have stored, but the | |
1931 | * valid lifetime is invalid, just | |
1932 | * reset prefered_lft. | |
1933 | * | |
1934 | * We must set the valid lifetime | |
1935 | * to the stored lifetime since we'll | |
1936 | * be updating the timestamp below, | |
1937 | * else we'll set it back to the | |
1938 | * minumum. | |
1939 | */ | |
1940 | if (prefered_lft != ifp->prefered_lft) { | |
1941 | valid_lft = stored_lft; | |
1942 | update_lft = 1; | |
1943 | } | |
1da177e4 LT |
1944 | } else { |
1945 | valid_lft = MIN_VALID_LIFETIME; | |
1946 | if (valid_lft < prefered_lft) | |
1947 | prefered_lft = valid_lft; | |
1948 | update_lft = 1; | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | if (update_lft) { | |
1953 | ifp->valid_lft = valid_lft; | |
1954 | ifp->prefered_lft = prefered_lft; | |
1955 | ifp->tstamp = now; | |
1956 | flags = ifp->flags; | |
1957 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1958 | spin_unlock(&ifp->lock); | |
1959 | ||
1960 | if (!(flags&IFA_F_TENTATIVE)) | |
1961 | ipv6_ifa_notify(0, ifp); | |
1962 | } else | |
1963 | spin_unlock(&ifp->lock); | |
1964 | ||
1965 | #ifdef CONFIG_IPV6_PRIVACY | |
1966 | read_lock_bh(&in6_dev->lock); | |
1967 | /* update all temporary addresses in the list */ | |
372e6c8f | 1968 | list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) { |
1da177e4 LT |
1969 | /* |
1970 | * When adjusting the lifetimes of an existing | |
1971 | * temporary address, only lower the lifetimes. | |
1972 | * Implementations must not increase the | |
1973 | * lifetimes of an existing temporary address | |
1974 | * when processing a Prefix Information Option. | |
1975 | */ | |
c6fbfac2 BB |
1976 | if (ifp != ift->ifpub) |
1977 | continue; | |
1978 | ||
1da177e4 LT |
1979 | spin_lock(&ift->lock); |
1980 | flags = ift->flags; | |
1981 | if (ift->valid_lft > valid_lft && | |
1982 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1983 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1984 | if (ift->prefered_lft > prefered_lft && | |
1985 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1986 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1987 | spin_unlock(&ift->lock); | |
1988 | if (!(flags&IFA_F_TENTATIVE)) | |
1989 | ipv6_ifa_notify(0, ift); | |
1990 | } | |
1991 | ||
1992 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1993 | /* | |
1994 | * When a new public address is created as described in [ADDRCONF], | |
1995 | * also create a new temporary address. | |
1996 | */ | |
1ab1457c | 1997 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1998 | ipv6_create_tempaddr(ifp, NULL); |
1999 | } else { | |
2000 | read_unlock_bh(&in6_dev->lock); | |
2001 | } | |
2002 | #endif | |
2003 | in6_ifa_put(ifp); | |
2004 | addrconf_verify(0); | |
2005 | } | |
2006 | } | |
2007 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2008 | in6_dev_put(in6_dev); | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * Set destination address. | |
2013 | * Special case for SIT interfaces where we create a new "virtual" | |
2014 | * device. | |
2015 | */ | |
af284937 | 2016 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2017 | { |
2018 | struct in6_ifreq ireq; | |
2019 | struct net_device *dev; | |
2020 | int err = -EINVAL; | |
2021 | ||
2022 | rtnl_lock(); | |
2023 | ||
2024 | err = -EFAULT; | |
2025 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2026 | goto err_exit; | |
2027 | ||
af284937 | 2028 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2029 | |
2030 | err = -ENODEV; | |
2031 | if (dev == NULL) | |
2032 | goto err_exit; | |
2033 | ||
0be669bb | 2034 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2035 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2036 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2037 | struct ifreq ifr; |
1da177e4 LT |
2038 | struct ip_tunnel_parm p; |
2039 | ||
2040 | err = -EADDRNOTAVAIL; | |
2041 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2042 | goto err_exit; | |
2043 | ||
2044 | memset(&p, 0, sizeof(p)); | |
2045 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2046 | p.iph.saddr = 0; | |
2047 | p.iph.version = 4; | |
2048 | p.iph.ihl = 5; | |
2049 | p.iph.protocol = IPPROTO_IPV6; | |
2050 | p.iph.ttl = 64; | |
d20b3109 | 2051 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2052 | |
5bc3eb7e SH |
2053 | if (ops->ndo_do_ioctl) { |
2054 | mm_segment_t oldfs = get_fs(); | |
2055 | ||
2056 | set_fs(KERNEL_DS); | |
2057 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2058 | set_fs(oldfs); | |
2059 | } else | |
2060 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2061 | |
2062 | if (err == 0) { | |
2063 | err = -ENOBUFS; | |
af284937 DL |
2064 | dev = __dev_get_by_name(net, p.name); |
2065 | if (!dev) | |
1da177e4 LT |
2066 | goto err_exit; |
2067 | err = dev_open(dev); | |
2068 | } | |
2069 | } | |
0be669bb | 2070 | #endif |
1da177e4 LT |
2071 | |
2072 | err_exit: | |
2073 | rtnl_unlock(); | |
2074 | return err; | |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * Manual configuration of address on an interface | |
2079 | */ | |
af284937 | 2080 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2081 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2082 | __u32 valid_lft) |
1da177e4 LT |
2083 | { |
2084 | struct inet6_ifaddr *ifp; | |
2085 | struct inet6_dev *idev; | |
2086 | struct net_device *dev; | |
2087 | int scope; | |
6f704992 YH |
2088 | u32 flags; |
2089 | clock_t expires; | |
4bed72e4 | 2090 | unsigned long timeout; |
1da177e4 LT |
2091 | |
2092 | ASSERT_RTNL(); | |
1ab1457c | 2093 | |
24ef0da7 TG |
2094 | if (plen > 128) |
2095 | return -EINVAL; | |
2096 | ||
0778769d NT |
2097 | /* check the lifetime */ |
2098 | if (!valid_lft || prefered_lft > valid_lft) | |
2099 | return -EINVAL; | |
2100 | ||
af284937 DL |
2101 | dev = __dev_get_by_index(net, ifindex); |
2102 | if (!dev) | |
1da177e4 | 2103 | return -ENODEV; |
1ab1457c | 2104 | |
1da177e4 LT |
2105 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2106 | return -ENOBUFS; | |
2107 | ||
2108 | scope = ipv6_addr_scope(pfx); | |
2109 | ||
4bed72e4 YH |
2110 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2111 | if (addrconf_finite_timeout(timeout)) { | |
2112 | expires = jiffies_to_clock_t(timeout * HZ); | |
2113 | valid_lft = timeout; | |
6f704992 | 2114 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2115 | } else { |
2116 | expires = 0; | |
2117 | flags = 0; | |
2118 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2119 | } |
0778769d | 2120 | |
4bed72e4 YH |
2121 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2122 | if (addrconf_finite_timeout(timeout)) { | |
2123 | if (timeout == 0) | |
2124 | ifa_flags |= IFA_F_DEPRECATED; | |
2125 | prefered_lft = timeout; | |
2126 | } | |
0778769d NT |
2127 | |
2128 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2129 | ||
1da177e4 | 2130 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2131 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2132 | ifp->valid_lft = valid_lft; |
2133 | ifp->prefered_lft = prefered_lft; | |
2134 | ifp->tstamp = jiffies; | |
06aebfb7 | 2135 | spin_unlock_bh(&ifp->lock); |
0778769d | 2136 | |
46d48046 | 2137 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2138 | expires, flags); |
95c385b4 NH |
2139 | /* |
2140 | * Note that section 3.1 of RFC 4429 indicates | |
2141 | * that the Optimistic flag should not be set for | |
2142 | * manually configured addresses | |
2143 | */ | |
1da177e4 LT |
2144 | addrconf_dad_start(ifp, 0); |
2145 | in6_ifa_put(ifp); | |
0778769d | 2146 | addrconf_verify(0); |
1da177e4 LT |
2147 | return 0; |
2148 | } | |
2149 | ||
2150 | return PTR_ERR(ifp); | |
2151 | } | |
2152 | ||
af284937 | 2153 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2154 | unsigned int plen) |
1da177e4 LT |
2155 | { |
2156 | struct inet6_ifaddr *ifp; | |
2157 | struct inet6_dev *idev; | |
2158 | struct net_device *dev; | |
1ab1457c | 2159 | |
24ef0da7 TG |
2160 | if (plen > 128) |
2161 | return -EINVAL; | |
2162 | ||
af284937 DL |
2163 | dev = __dev_get_by_index(net, ifindex); |
2164 | if (!dev) | |
1da177e4 LT |
2165 | return -ENODEV; |
2166 | ||
2167 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2168 | return -ENXIO; | |
2169 | ||
2170 | read_lock_bh(&idev->lock); | |
502a2ffd | 2171 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2172 | if (ifp->prefix_len == plen && |
2173 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2174 | in6_ifa_hold(ifp); | |
2175 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2176 | |
1da177e4 LT |
2177 | ipv6_del_addr(ifp); |
2178 | ||
2179 | /* If the last address is deleted administratively, | |
2180 | disable IPv6 on this interface. | |
2181 | */ | |
502a2ffd | 2182 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2183 | addrconf_ifdown(idev->dev, 1); |
2184 | return 0; | |
2185 | } | |
2186 | } | |
2187 | read_unlock_bh(&idev->lock); | |
2188 | return -EADDRNOTAVAIL; | |
2189 | } | |
2190 | ||
2191 | ||
af284937 | 2192 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2193 | { |
2194 | struct in6_ifreq ireq; | |
2195 | int err; | |
1ab1457c | 2196 | |
1da177e4 LT |
2197 | if (!capable(CAP_NET_ADMIN)) |
2198 | return -EPERM; | |
1ab1457c | 2199 | |
1da177e4 LT |
2200 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2201 | return -EFAULT; | |
2202 | ||
2203 | rtnl_lock(); | |
af284937 DL |
2204 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2205 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2206 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2207 | rtnl_unlock(); |
2208 | return err; | |
2209 | } | |
2210 | ||
af284937 | 2211 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2212 | { |
2213 | struct in6_ifreq ireq; | |
2214 | int err; | |
1ab1457c | 2215 | |
1da177e4 LT |
2216 | if (!capable(CAP_NET_ADMIN)) |
2217 | return -EPERM; | |
2218 | ||
2219 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2220 | return -EFAULT; | |
2221 | ||
2222 | rtnl_lock(); | |
af284937 DL |
2223 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2224 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2225 | rtnl_unlock(); |
2226 | return err; | |
2227 | } | |
2228 | ||
b5f348e5 IJ |
2229 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2230 | int plen, int scope) | |
2231 | { | |
2232 | struct inet6_ifaddr *ifp; | |
2233 | ||
2234 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2235 | if (!IS_ERR(ifp)) { | |
2236 | spin_lock_bh(&ifp->lock); | |
2237 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2238 | spin_unlock_bh(&ifp->lock); | |
2239 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2240 | in6_ifa_put(ifp); | |
2241 | } | |
2242 | } | |
2243 | ||
0be669bb | 2244 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2245 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2246 | { | |
1da177e4 LT |
2247 | struct in6_addr addr; |
2248 | struct net_device *dev; | |
c346dca1 | 2249 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2250 | int scope; |
2251 | ||
2252 | ASSERT_RTNL(); | |
2253 | ||
2254 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2255 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2256 | ||
2257 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2258 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2259 | scope = IFA_LINK; | |
2260 | } else { | |
2261 | scope = IPV6_ADDR_COMPATv4; | |
2262 | } | |
2263 | ||
2264 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2265 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2266 | return; |
2267 | } | |
2268 | ||
6fda7350 | 2269 | for_each_netdev(net, dev) { |
e5ed6399 | 2270 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2271 | if (in_dev && (dev->flags & IFF_UP)) { |
2272 | struct in_ifaddr * ifa; | |
2273 | ||
2274 | int flag = scope; | |
2275 | ||
2276 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2277 | int plen; | |
2278 | ||
2279 | addr.s6_addr32[3] = ifa->ifa_local; | |
2280 | ||
2281 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2282 | continue; | |
2283 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2284 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2285 | continue; | |
2286 | flag |= IFA_HOST; | |
2287 | } | |
2288 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2289 | plen = 64; | |
2290 | else | |
2291 | plen = 96; | |
2292 | ||
b5f348e5 | 2293 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2294 | } |
2295 | } | |
1ab1457c | 2296 | } |
1da177e4 | 2297 | } |
0be669bb | 2298 | #endif |
1da177e4 LT |
2299 | |
2300 | static void init_loopback(struct net_device *dev) | |
2301 | { | |
2302 | struct inet6_dev *idev; | |
1da177e4 LT |
2303 | |
2304 | /* ::1 */ | |
2305 | ||
2306 | ASSERT_RTNL(); | |
2307 | ||
2308 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2309 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2310 | return; | |
2311 | } | |
2312 | ||
b5f348e5 | 2313 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2314 | } |
2315 | ||
2316 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2317 | { | |
2318 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2319 | u32 addr_flags = IFA_F_PERMANENT; |
2320 | ||
2321 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2322 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2323 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2324 | addr_flags |= IFA_F_OPTIMISTIC; |
2325 | #endif | |
1da177e4 | 2326 | |
95c385b4 NH |
2327 | |
2328 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2329 | if (!IS_ERR(ifp)) { |
46d48046 | 2330 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2331 | addrconf_dad_start(ifp, 0); |
2332 | in6_ifa_put(ifp); | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | static void addrconf_dev_config(struct net_device *dev) | |
2337 | { | |
2338 | struct in6_addr addr; | |
2339 | struct inet6_dev * idev; | |
2340 | ||
2341 | ASSERT_RTNL(); | |
2342 | ||
74235a25 HX |
2343 | if ((dev->type != ARPHRD_ETHER) && |
2344 | (dev->type != ARPHRD_FDDI) && | |
2345 | (dev->type != ARPHRD_IEEE802_TR) && | |
2346 | (dev->type != ARPHRD_ARCNET) && | |
2347 | (dev->type != ARPHRD_INFINIBAND)) { | |
2348 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2349 | return; | |
2350 | } | |
2351 | ||
1da177e4 LT |
2352 | idev = addrconf_add_dev(dev); |
2353 | if (idev == NULL) | |
2354 | return; | |
2355 | ||
2356 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2357 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2358 | ||
2359 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2360 | addrconf_add_linklocal(idev, &addr); | |
2361 | } | |
2362 | ||
0be669bb | 2363 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2364 | static void addrconf_sit_config(struct net_device *dev) |
2365 | { | |
2366 | struct inet6_dev *idev; | |
2367 | ||
2368 | ASSERT_RTNL(); | |
2369 | ||
1ab1457c YH |
2370 | /* |
2371 | * Configure the tunnel with one of our IPv4 | |
2372 | * addresses... we should configure all of | |
1da177e4 LT |
2373 | * our v4 addrs in the tunnel |
2374 | */ | |
2375 | ||
2376 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2377 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2378 | return; | |
2379 | } | |
2380 | ||
c7dc89c0 FT |
2381 | if (dev->priv_flags & IFF_ISATAP) { |
2382 | struct in6_addr addr; | |
2383 | ||
2384 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2385 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2386 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2387 | addrconf_add_linklocal(idev, &addr); | |
2388 | return; | |
2389 | } | |
2390 | ||
1da177e4 LT |
2391 | sit_add_v4_addrs(idev); |
2392 | ||
2393 | if (dev->flags&IFF_POINTOPOINT) { | |
2394 | addrconf_add_mroute(dev); | |
2395 | addrconf_add_lroute(dev); | |
2396 | } else | |
2397 | sit_route_add(dev); | |
2398 | } | |
0be669bb | 2399 | #endif |
1da177e4 LT |
2400 | |
2401 | static inline int | |
2402 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2403 | { | |
2404 | struct in6_addr lladdr; | |
2405 | ||
95c385b4 | 2406 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2407 | addrconf_add_linklocal(idev, &lladdr); |
2408 | return 0; | |
2409 | } | |
2410 | return -1; | |
2411 | } | |
2412 | ||
2413 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2414 | { | |
2415 | struct net_device *link_dev; | |
c346dca1 | 2416 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2417 | |
2418 | /* first try to inherit the link-local address from the link device */ | |
2419 | if (idev->dev->iflink && | |
6fda7350 | 2420 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2421 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2422 | return; | |
2423 | } | |
2424 | /* then try to inherit it from any device */ | |
6fda7350 | 2425 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2426 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2427 | return; | |
2428 | } | |
2429 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2430 | } | |
2431 | ||
2432 | /* | |
2433 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2434 | * DHCPv6, MLD etc. can be run over the virtual link | |
2435 | */ | |
2436 | ||
2437 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2438 | { | |
2439 | struct inet6_dev *idev; | |
2440 | ||
2441 | ASSERT_RTNL(); | |
2442 | ||
e21e8467 SH |
2443 | idev = addrconf_add_dev(dev); |
2444 | if (!idev) { | |
1da177e4 LT |
2445 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
2446 | return; | |
2447 | } | |
2448 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2449 | } |
2450 | ||
1ab1457c | 2451 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2452 | void * data) |
2453 | { | |
2454 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2455 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2456 | int run_pending = 0; |
b217d616 | 2457 | int err; |
1da177e4 | 2458 | |
e21e8467 | 2459 | switch (event) { |
45ba9dd2 | 2460 | case NETDEV_REGISTER: |
74235a25 | 2461 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2462 | idev = ipv6_add_dev(dev); |
2463 | if (!idev) | |
b217d616 | 2464 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2465 | } |
2466 | break; | |
bcdd553f | 2467 | |
1da177e4 | 2468 | case NETDEV_UP: |
3c21edbd | 2469 | case NETDEV_CHANGE: |
c2edacf8 JV |
2470 | if (dev->flags & IFF_SLAVE) |
2471 | break; | |
2472 | ||
3c21edbd | 2473 | if (event == NETDEV_UP) { |
f24e3d65 | 2474 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2475 | /* device is not ready yet. */ |
2476 | printk(KERN_INFO | |
2477 | "ADDRCONF(NETDEV_UP): %s: " | |
2478 | "link is not ready\n", | |
2479 | dev->name); | |
2480 | break; | |
2481 | } | |
99081049 | 2482 | |
d31c7b8f EP |
2483 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2484 | idev = ipv6_add_dev(dev); | |
2485 | ||
e3ec6cfc | 2486 | if (idev) { |
99081049 | 2487 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2488 | run_pending = 1; |
2489 | } | |
3c21edbd | 2490 | } else { |
f24e3d65 | 2491 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2492 | /* device is still not ready. */ |
2493 | break; | |
2494 | } | |
2495 | ||
2496 | if (idev) { | |
bcdd553f | 2497 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2498 | /* device is already configured. */ |
2499 | break; | |
3c21edbd YH |
2500 | idev->if_flags |= IF_READY; |
2501 | } | |
2502 | ||
2503 | printk(KERN_INFO | |
2504 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2505 | "link becomes ready\n", | |
2506 | dev->name); | |
2507 | ||
c5e33bdd | 2508 | run_pending = 1; |
3c21edbd YH |
2509 | } |
2510 | ||
e21e8467 | 2511 | switch (dev->type) { |
0be669bb | 2512 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2513 | case ARPHRD_SIT: |
2514 | addrconf_sit_config(dev); | |
2515 | break; | |
0be669bb | 2516 | #endif |
1da177e4 LT |
2517 | case ARPHRD_TUNNEL6: |
2518 | addrconf_ip6_tnl_config(dev); | |
2519 | break; | |
2520 | case ARPHRD_LOOPBACK: | |
2521 | init_loopback(dev); | |
2522 | break; | |
2523 | ||
2524 | default: | |
2525 | addrconf_dev_config(dev); | |
2526 | break; | |
3ff50b79 | 2527 | } |
bcdd553f | 2528 | |
1da177e4 | 2529 | if (idev) { |
c5e33bdd YH |
2530 | if (run_pending) |
2531 | addrconf_dad_run(idev); | |
2532 | ||
bcdd553f SH |
2533 | /* |
2534 | * If the MTU changed during the interface down, | |
2535 | * when the interface up, the changed MTU must be | |
2536 | * reflected in the idev as well as routers. | |
1da177e4 | 2537 | */ |
bcdd553f SH |
2538 | if (idev->cnf.mtu6 != dev->mtu && |
2539 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2540 | rt6_mtu_change(dev, dev->mtu); |
2541 | idev->cnf.mtu6 = dev->mtu; | |
2542 | } | |
2543 | idev->tstamp = jiffies; | |
2544 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2545 | |
2546 | /* | |
2547 | * If the changed mtu during down is lower than | |
2548 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2549 | */ |
2550 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2551 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2552 | } |
2553 | break; | |
2554 | ||
2555 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2556 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2557 | rt6_mtu_change(dev, dev->mtu); |
2558 | idev->cnf.mtu6 = dev->mtu; | |
2559 | break; | |
2560 | } | |
2561 | ||
d31c7b8f EP |
2562 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2563 | idev = ipv6_add_dev(dev); | |
2564 | if (idev) | |
2565 | break; | |
2566 | } | |
2567 | ||
bcdd553f SH |
2568 | /* |
2569 | * MTU falled under IPV6_MIN_MTU. | |
2570 | * Stop IPv6 on this interface. | |
2571 | */ | |
1da177e4 LT |
2572 | |
2573 | case NETDEV_DOWN: | |
2574 | case NETDEV_UNREGISTER: | |
2575 | /* | |
2576 | * Remove all addresses from this interface. | |
2577 | */ | |
2578 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2579 | break; | |
3c21edbd | 2580 | |
1da177e4 | 2581 | case NETDEV_CHANGENAME: |
1da177e4 | 2582 | if (idev) { |
5632c515 | 2583 | snmp6_unregister_dev(idev); |
408c4768 | 2584 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2585 | addrconf_sysctl_register(idev); |
b217d616 HX |
2586 | err = snmp6_register_dev(idev); |
2587 | if (err) | |
2588 | return notifier_from_errno(err); | |
5632c515 | 2589 | } |
1da177e4 | 2590 | break; |
bcdd553f | 2591 | |
93d9b7d7 JP |
2592 | case NETDEV_PRE_TYPE_CHANGE: |
2593 | case NETDEV_POST_TYPE_CHANGE: | |
2594 | addrconf_type_change(dev, event); | |
75c78500 | 2595 | break; |
3ff50b79 | 2596 | } |
1da177e4 LT |
2597 | |
2598 | return NOTIFY_OK; | |
2599 | } | |
2600 | ||
2601 | /* | |
2602 | * addrconf module should be notified of a device going up | |
2603 | */ | |
2604 | static struct notifier_block ipv6_dev_notf = { | |
2605 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2606 | }; |
2607 | ||
93d9b7d7 | 2608 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2609 | { |
2610 | struct inet6_dev *idev; | |
2611 | ASSERT_RTNL(); | |
2612 | ||
2613 | idev = __in6_dev_get(dev); | |
2614 | ||
93d9b7d7 | 2615 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2616 | ipv6_mc_remap(idev); |
93d9b7d7 | 2617 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2618 | ipv6_mc_unmap(idev); |
2619 | } | |
2620 | ||
1da177e4 LT |
2621 | static int addrconf_ifdown(struct net_device *dev, int how) |
2622 | { | |
c346dca1 | 2623 | struct net *net = dev_net(dev); |
502a2ffd | 2624 | struct inet6_dev *idev; |
2625 | struct inet6_ifaddr *ifa; | |
2626 | LIST_HEAD(keep_list); | |
1da177e4 LT |
2627 | |
2628 | ASSERT_RTNL(); | |
2629 | ||
f3db4851 | 2630 | rt6_ifdown(net, dev); |
1da177e4 LT |
2631 | neigh_ifdown(&nd_tbl, dev); |
2632 | ||
2633 | idev = __in6_dev_get(dev); | |
2634 | if (idev == NULL) | |
2635 | return -ENODEV; | |
2636 | ||
bcdd553f SH |
2637 | /* |
2638 | * Step 1: remove reference to ipv6 device from parent device. | |
2639 | * Do not dev_put! | |
1da177e4 | 2640 | */ |
439e2385 | 2641 | if (how) { |
1da177e4 | 2642 | idev->dead = 1; |
8814c4b5 YH |
2643 | |
2644 | /* protected by rtnl_lock */ | |
2645 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2646 | |
2647 | /* Step 1.5: remove snmp6 entry */ | |
2648 | snmp6_unregister_dev(idev); | |
2649 | ||
2650 | } | |
2651 | ||
1da177e4 LT |
2652 | write_lock_bh(&idev->lock); |
2653 | ||
bcdd553f | 2654 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2655 | if (!how) |
3c21edbd | 2656 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2657 | |
1da177e4 | 2658 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2659 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2660 | in6_dev_put(idev); |
2661 | ||
bcdd553f | 2662 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2663 | while (!list_empty(&idev->tempaddr_list)) { |
2664 | ifa = list_first_entry(&idev->tempaddr_list, | |
2665 | struct inet6_ifaddr, tmp_list); | |
2666 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2667 | ifa->dead = 1; |
2668 | write_unlock_bh(&idev->lock); | |
2669 | spin_lock_bh(&ifa->lock); | |
2670 | ||
2671 | if (ifa->ifpub) { | |
2672 | in6_ifa_put(ifa->ifpub); | |
2673 | ifa->ifpub = NULL; | |
2674 | } | |
2675 | spin_unlock_bh(&ifa->lock); | |
2676 | in6_ifa_put(ifa); | |
2677 | write_lock_bh(&idev->lock); | |
2678 | } | |
2679 | #endif | |
8f37ada5 | 2680 | |
502a2ffd | 2681 | while (!list_empty(&idev->addr_list)) { |
2682 | ifa = list_first_entry(&idev->addr_list, | |
2683 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2684 | addrconf_del_timer(ifa); |
2685 | ||
2686 | /* If just doing link down, and address is permanent | |
2687 | and not link-local, then retain it. */ | |
bcdd553f | 2688 | if (!how && |
84e8b803 | 2689 | (ifa->flags&IFA_F_PERMANENT) && |
2690 | !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { | |
502a2ffd | 2691 | list_move_tail(&ifa->if_list, &keep_list); |
dc2b99f7 | 2692 | |
84e8b803 | 2693 | /* If not doing DAD on this address, just keep it. */ |
2694 | if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) || | |
2695 | idev->cnf.accept_dad <= 0 || | |
2696 | (ifa->flags & IFA_F_NODAD)) | |
2697 | continue; | |
2698 | ||
2699 | /* If it was tentative already, no need to notify */ | |
2700 | if (ifa->flags & IFA_F_TENTATIVE) | |
2701 | continue; | |
2702 | ||
2703 | /* Flag it for later restoration when link comes up */ | |
2704 | ifa->flags |= IFA_F_TENTATIVE; | |
2705 | in6_ifa_hold(ifa); | |
27bdb2ab | 2706 | write_unlock_bh(&idev->lock); |
dc2b99f7 | 2707 | } else { |
502a2ffd | 2708 | list_del(&ifa->if_list); |
dc2b99f7 | 2709 | ifa->dead = 1; |
27bdb2ab | 2710 | write_unlock_bh(&idev->lock); |
1da177e4 | 2711 | |
27bdb2ab | 2712 | /* clear hash table */ |
2713 | spin_lock_bh(&addrconf_hash_lock); | |
2714 | hlist_del_init_rcu(&ifa->addr_lst); | |
27bdb2ab | 2715 | spin_unlock_bh(&addrconf_hash_lock); |
2716 | } | |
c2e21293 | 2717 | |
84e8b803 | 2718 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
8595805a | 2719 | if (ifa->dead) |
2720 | atomic_notifier_call_chain(&inet6addr_chain, | |
2721 | NETDEV_DOWN, ifa); | |
84e8b803 | 2722 | in6_ifa_put(ifa); |
dc2b99f7 | 2723 | |
84e8b803 | 2724 | write_lock_bh(&idev->lock); |
1da177e4 | 2725 | } |
8f37ada5 | 2726 | |
502a2ffd | 2727 | list_splice(&keep_list, &idev->addr_list); |
8f37ada5 | 2728 | |
1da177e4 LT |
2729 | write_unlock_bh(&idev->lock); |
2730 | ||
2731 | /* Step 5: Discard multicast list */ | |
439e2385 | 2732 | if (how) |
1da177e4 LT |
2733 | ipv6_mc_destroy_dev(idev); |
2734 | else | |
2735 | ipv6_mc_down(idev); | |
2736 | ||
1da177e4 | 2737 | idev->tstamp = jiffies; |
1ab1457c | 2738 | |
bcdd553f | 2739 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2740 | if (how) { |
408c4768 | 2741 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2742 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2743 | neigh_ifdown(&nd_tbl, dev); | |
2744 | in6_dev_put(idev); | |
2745 | } | |
2746 | return 0; | |
2747 | } | |
2748 | ||
2749 | static void addrconf_rs_timer(unsigned long data) | |
2750 | { | |
2751 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2752 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2753 | |
5b2a1953 | 2754 | read_lock(&idev->lock); |
2755 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2756 | goto out; |
2757 | ||
5b2a1953 | 2758 | if (idev->cnf.forwarding) |
2759 | goto out; | |
2760 | ||
2761 | /* Announcement received after solicitation was sent */ | |
2762 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2763 | goto out; |
1da177e4 LT |
2764 | |
2765 | spin_lock(&ifp->lock); | |
5b2a1953 | 2766 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2767 | /* The wait after the last probe can be shorter */ |
2768 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2769 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2770 | idev->cnf.rtr_solicit_delay : | |
2771 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2772 | spin_unlock(&ifp->lock); |
2773 | ||
5b2a1953 | 2774 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2775 | } else { |
2776 | spin_unlock(&ifp->lock); | |
2777 | /* | |
2778 | * Note: we do not support deprecated "all on-link" | |
2779 | * assumption any longer. | |
2780 | */ | |
2781 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
5b2a1953 | 2782 | idev->dev->name); |
1da177e4 LT |
2783 | } |
2784 | ||
2785 | out: | |
5b2a1953 | 2786 | read_unlock(&idev->lock); |
1da177e4 LT |
2787 | in6_ifa_put(ifp); |
2788 | } | |
2789 | ||
2790 | /* | |
2791 | * Duplicate Address Detection | |
2792 | */ | |
3c21edbd YH |
2793 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2794 | { | |
2795 | unsigned long rand_num; | |
2796 | struct inet6_dev *idev = ifp->idev; | |
2797 | ||
95c385b4 NH |
2798 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2799 | rand_num = 0; | |
2800 | else | |
2801 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2802 | ||
3c21edbd YH |
2803 | ifp->probes = idev->cnf.dad_transmits; |
2804 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2805 | } | |
2806 | ||
e431b8c0 | 2807 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2808 | { |
2809 | struct inet6_dev *idev = ifp->idev; | |
2810 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2811 | |
2812 | addrconf_join_solict(dev, &ifp->addr); | |
2813 | ||
1da177e4 | 2814 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2815 | |
2816 | read_lock_bh(&idev->lock); | |
2817 | if (ifp->dead) | |
2818 | goto out; | |
1da177e4 | 2819 | |
21809faf | 2820 | spin_lock(&ifp->lock); |
1da177e4 | 2821 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
1b34be74 | 2822 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2823 | !(ifp->flags&IFA_F_TENTATIVE) || |
2824 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2825 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2826 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2827 | read_unlock_bh(&idev->lock); |
2828 | ||
2829 | addrconf_dad_completed(ifp); | |
2830 | return; | |
2831 | } | |
2832 | ||
6732bade | 2833 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2834 | spin_unlock(&ifp->lock); |
6732bade | 2835 | read_unlock_bh(&idev->lock); |
3c21edbd | 2836 | /* |
590a9887 | 2837 | * If the device is not ready: |
3c21edbd YH |
2838 | * - keep it tentative if it is a permanent address. |
2839 | * - otherwise, kill it. | |
2840 | */ | |
2841 | in6_ifa_hold(ifp); | |
cc411d0b | 2842 | addrconf_dad_stop(ifp, 0); |
6732bade | 2843 | return; |
3c21edbd | 2844 | } |
95c385b4 NH |
2845 | |
2846 | /* | |
2847 | * Optimistic nodes can start receiving | |
2848 | * Frames right away | |
2849 | */ | |
e21e8467 | 2850 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
2851 | ip6_ins_rt(ifp->rt); |
2852 | ||
6732bade | 2853 | addrconf_dad_kick(ifp); |
21809faf | 2854 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2855 | out: |
2856 | read_unlock_bh(&idev->lock); | |
2857 | } | |
2858 | ||
2859 | static void addrconf_dad_timer(unsigned long data) | |
2860 | { | |
2861 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2862 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2863 | struct in6_addr mcaddr; |
2864 | ||
122e4519 | 2865 | read_lock(&idev->lock); |
2866 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2867 | read_unlock(&idev->lock); | |
1da177e4 LT |
2868 | goto out; |
2869 | } | |
21809faf | 2870 | |
2871 | spin_lock(&ifp->lock); | |
1da177e4 LT |
2872 | if (ifp->probes == 0) { |
2873 | /* | |
2874 | * DAD was successful | |
2875 | */ | |
2876 | ||
cc411d0b | 2877 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2878 | spin_unlock(&ifp->lock); |
122e4519 | 2879 | read_unlock(&idev->lock); |
1da177e4 LT |
2880 | |
2881 | addrconf_dad_completed(ifp); | |
2882 | ||
2883 | goto out; | |
2884 | } | |
2885 | ||
2886 | ifp->probes--; | |
2887 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 2888 | spin_unlock(&ifp->lock); |
122e4519 | 2889 | read_unlock(&idev->lock); |
1da177e4 LT |
2890 | |
2891 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2892 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2893 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2894 | out: |
2895 | in6_ifa_put(ifp); | |
2896 | } | |
2897 | ||
2898 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2899 | { | |
e21e8467 | 2900 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
2901 | |
2902 | /* | |
2903 | * Configure the address for reception. Now it is valid. | |
2904 | */ | |
2905 | ||
2906 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2907 | ||
2908 | /* If added prefix is link local and forwarding is off, | |
2909 | start sending router solicitations. | |
2910 | */ | |
2911 | ||
2912 | if (ifp->idev->cnf.forwarding == 0 && | |
2913 | ifp->idev->cnf.rtr_solicits > 0 && | |
2914 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2915 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2916 | /* |
2917 | * If a host as already performed a random delay | |
2918 | * [...] as part of DAD [...] there is no need | |
2919 | * to delay again before sending the first RS | |
2920 | */ | |
f3ee4010 | 2921 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2922 | |
2923 | spin_lock_bh(&ifp->lock); | |
2924 | ifp->probes = 1; | |
2925 | ifp->idev->if_flags |= IF_RS_SENT; | |
2926 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2927 | spin_unlock_bh(&ifp->lock); | |
2928 | } | |
2929 | } | |
2930 | ||
e21e8467 SH |
2931 | static void addrconf_dad_run(struct inet6_dev *idev) |
2932 | { | |
c5e33bdd YH |
2933 | struct inet6_ifaddr *ifp; |
2934 | ||
2935 | read_lock_bh(&idev->lock); | |
502a2ffd | 2936 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 2937 | spin_lock(&ifp->lock); |
c5e33bdd | 2938 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
21809faf | 2939 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2940 | continue; |
2941 | } | |
21809faf | 2942 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2943 | addrconf_dad_kick(ifp); |
2944 | } | |
2945 | read_unlock_bh(&idev->lock); | |
2946 | } | |
2947 | ||
1da177e4 LT |
2948 | #ifdef CONFIG_PROC_FS |
2949 | struct if6_iter_state { | |
3c40090a | 2950 | struct seq_net_private p; |
1da177e4 LT |
2951 | int bucket; |
2952 | }; | |
2953 | ||
2954 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2955 | { | |
2956 | struct inet6_ifaddr *ifa = NULL; | |
2957 | struct if6_iter_state *state = seq->private; | |
1218854a | 2958 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2959 | |
2960 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 2961 | struct hlist_node *n; |
5c578aed | 2962 | hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket], |
2963 | addr_lst) | |
c2e21293 | 2964 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2965 | return ifa; | |
1da177e4 | 2966 | } |
c2e21293 | 2967 | return NULL; |
1da177e4 LT |
2968 | } |
2969 | ||
c2e21293 | 2970 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
2971 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
2972 | { |
2973 | struct if6_iter_state *state = seq->private; | |
1218854a | 2974 | struct net *net = seq_file_net(seq); |
c2e21293 | 2975 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 2976 | |
5c578aed | 2977 | hlist_for_each_entry_continue_rcu(ifa, n, addr_lst) |
c2e21293 | 2978 | if (net_eq(dev_net(ifa->idev->dev), net)) |
2979 | return ifa; | |
3c40090a | 2980 | |
c2e21293 | 2981 | while (++state->bucket < IN6_ADDR_HSIZE) { |
2982 | hlist_for_each_entry(ifa, n, | |
2983 | &inet6_addr_lst[state->bucket], addr_lst) { | |
2984 | if (net_eq(dev_net(ifa->idev->dev), net)) | |
2985 | return ifa; | |
2986 | } | |
1da177e4 | 2987 | } |
3c40090a | 2988 | |
c2e21293 | 2989 | return NULL; |
1da177e4 LT |
2990 | } |
2991 | ||
2992 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2993 | { | |
2994 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2995 | ||
2996 | if (ifa) | |
e21e8467 | 2997 | while (pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
1da177e4 LT |
2998 | --pos; |
2999 | return pos ? NULL : ifa; | |
3000 | } | |
3001 | ||
3002 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
5c578aed | 3003 | __acquires(rcu) |
1da177e4 | 3004 | { |
5c578aed | 3005 | rcu_read_lock_bh(); |
1da177e4 LT |
3006 | return if6_get_idx(seq, *pos); |
3007 | } | |
3008 | ||
3009 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3010 | { | |
3011 | struct inet6_ifaddr *ifa; | |
3012 | ||
3013 | ifa = if6_get_next(seq, v); | |
3014 | ++*pos; | |
3015 | return ifa; | |
3016 | } | |
3017 | ||
3018 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
5c578aed | 3019 | __releases(rcu) |
1da177e4 | 3020 | { |
5c578aed | 3021 | rcu_read_unlock_bh(); |
1da177e4 LT |
3022 | } |
3023 | ||
3024 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3025 | { | |
3026 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3027 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3028 | &ifp->addr, |
1da177e4 LT |
3029 | ifp->idev->dev->ifindex, |
3030 | ifp->prefix_len, | |
3031 | ifp->scope, | |
3032 | ifp->flags, | |
3033 | ifp->idev->dev->name); | |
3034 | return 0; | |
3035 | } | |
3036 | ||
56b3d975 | 3037 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3038 | .start = if6_seq_start, |
3039 | .next = if6_seq_next, | |
3040 | .show = if6_seq_show, | |
3041 | .stop = if6_seq_stop, | |
3042 | }; | |
3043 | ||
3044 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3045 | { | |
3c40090a DL |
3046 | return seq_open_net(inode, file, &if6_seq_ops, |
3047 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3048 | } |
3049 | ||
9a32144e | 3050 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3051 | .owner = THIS_MODULE, |
3052 | .open = if6_seq_open, | |
3053 | .read = seq_read, | |
3054 | .llseek = seq_lseek, | |
3c40090a | 3055 | .release = seq_release_net, |
1da177e4 LT |
3056 | }; |
3057 | ||
2c8c1e72 | 3058 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3059 | { |
3c40090a | 3060 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3061 | return -ENOMEM; |
3062 | return 0; | |
3063 | } | |
3064 | ||
2c8c1e72 | 3065 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3066 | { |
3067 | proc_net_remove(net, "if_inet6"); | |
3068 | } | |
3069 | ||
3070 | static struct pernet_operations if6_proc_net_ops = { | |
3071 | .init = if6_proc_net_init, | |
3072 | .exit = if6_proc_net_exit, | |
3073 | }; | |
3074 | ||
3075 | int __init if6_proc_init(void) | |
3076 | { | |
3077 | return register_pernet_subsys(&if6_proc_net_ops); | |
3078 | } | |
3079 | ||
1da177e4 LT |
3080 | void if6_proc_exit(void) |
3081 | { | |
3c40090a | 3082 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3083 | } |
3084 | #endif /* CONFIG_PROC_FS */ | |
3085 | ||
59fbb3a6 | 3086 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3087 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3088 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3089 | { |
3090 | int ret = 0; | |
c2e21293 | 3091 | struct inet6_ifaddr *ifp = NULL; |
3092 | struct hlist_node *n; | |
3a88a81d | 3093 | unsigned int hash = ipv6_addr_hash(addr); |
c2e21293 | 3094 | |
5c578aed | 3095 | rcu_read_lock_bh(); |
3096 | hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 3097 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3098 | continue; |
caad295f | 3099 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3100 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3101 | ret = 1; | |
3102 | break; | |
3103 | } | |
3104 | } | |
5c578aed | 3105 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3106 | return ret; |
3107 | } | |
3108 | #endif | |
3109 | ||
1da177e4 LT |
3110 | /* |
3111 | * Periodic address status verification | |
3112 | */ | |
3113 | ||
3114 | static void addrconf_verify(unsigned long foo) | |
3115 | { | |
b2db7564 | 3116 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3117 | struct inet6_ifaddr *ifp; |
c2e21293 | 3118 | struct hlist_node *node; |
1da177e4 LT |
3119 | int i; |
3120 | ||
5c578aed | 3121 | rcu_read_lock_bh(); |
3122 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3123 | now = jiffies; |
b2db7564 | 3124 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3125 | |
3126 | del_timer(&addr_chk_timer); | |
3127 | ||
bcdd553f | 3128 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3129 | restart: |
5c578aed | 3130 | hlist_for_each_entry_rcu(ifp, node, |
3131 | &inet6_addr_lst[i], addr_lst) { | |
1da177e4 | 3132 | unsigned long age; |
1da177e4 LT |
3133 | |
3134 | if (ifp->flags & IFA_F_PERMANENT) | |
3135 | continue; | |
3136 | ||
3137 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3138 | /* We try to batch several events at once. */ |
3139 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3140 | |
8f27ebb9 YH |
3141 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3142 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3143 | spin_unlock(&ifp->lock); |
3144 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3145 | ipv6_del_addr(ifp); |
3146 | goto restart; | |
8f27ebb9 YH |
3147 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3148 | spin_unlock(&ifp->lock); | |
3149 | continue; | |
1da177e4 | 3150 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3151 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3152 | int deprecate = 0; |
3153 | ||
3154 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3155 | deprecate = 1; | |
3156 | ifp->flags |= IFA_F_DEPRECATED; | |
3157 | } | |
3158 | ||
3159 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3160 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3161 | ||
3162 | spin_unlock(&ifp->lock); | |
3163 | ||
3164 | if (deprecate) { | |
3165 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3166 | |
3167 | ipv6_ifa_notify(0, ifp); | |
3168 | in6_ifa_put(ifp); | |
3169 | goto restart; | |
3170 | } | |
3171 | #ifdef CONFIG_IPV6_PRIVACY | |
3172 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3173 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3174 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3175 | ifp->idev->cnf.dad_transmits * | |
3176 | ifp->idev->nd_parms->retrans_time / HZ; | |
3177 | ||
1da177e4 LT |
3178 | if (age >= ifp->prefered_lft - regen_advance) { |
3179 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3180 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3181 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3182 | if (!ifp->regen_count && ifpub) { | |
3183 | ifp->regen_count++; | |
3184 | in6_ifa_hold(ifp); | |
3185 | in6_ifa_hold(ifpub); | |
3186 | spin_unlock(&ifp->lock); | |
5c578aed | 3187 | |
291d809b HY |
3188 | spin_lock(&ifpub->lock); |
3189 | ifpub->regen_count = 0; | |
3190 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3191 | ipv6_create_tempaddr(ifpub, ifp); |
3192 | in6_ifa_put(ifpub); | |
3193 | in6_ifa_put(ifp); | |
3194 | goto restart; | |
3195 | } | |
3196 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3197 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3198 | spin_unlock(&ifp->lock); | |
3199 | #endif | |
3200 | } else { | |
3201 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3202 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3203 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3204 | spin_unlock(&ifp->lock); | |
3205 | } | |
3206 | } | |
1da177e4 LT |
3207 | } |
3208 | ||
b2db7564 YH |
3209 | next_sec = round_jiffies_up(next); |
3210 | next_sched = next; | |
3211 | ||
3212 | /* If rounded timeout is accurate enough, accept it. */ | |
3213 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3214 | next_sched = next_sec; | |
3215 | ||
3216 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3217 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3218 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3219 | ||
3220 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3221 | now, next, next_sec, next_sched)); | |
3222 | ||
3223 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3224 | add_timer(&addr_chk_timer); |
5c578aed | 3225 | spin_unlock(&addrconf_verify_lock); |
3226 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3227 | } |
3228 | ||
461d8837 TG |
3229 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3230 | { | |
3231 | struct in6_addr *pfx = NULL; | |
3232 | ||
3233 | if (addr) | |
3234 | pfx = nla_data(addr); | |
3235 | ||
3236 | if (local) { | |
3237 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3238 | pfx = NULL; | |
3239 | else | |
3240 | pfx = nla_data(local); | |
3241 | } | |
3242 | ||
3243 | return pfx; | |
3244 | } | |
3245 | ||
ef7c79ed | 3246 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3247 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3248 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3249 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3250 | }; | |
3251 | ||
1da177e4 LT |
3252 | static int |
3253 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3254 | { | |
3b1e0a65 | 3255 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3256 | struct ifaddrmsg *ifm; |
3257 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3258 | struct in6_addr *pfx; |
b933f716 | 3259 | int err; |
1da177e4 | 3260 | |
b933f716 TG |
3261 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3262 | if (err < 0) | |
3263 | return err; | |
3264 | ||
3265 | ifm = nlmsg_data(nlh); | |
3266 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3267 | if (pfx == NULL) |
3268 | return -EINVAL; | |
3269 | ||
af284937 | 3270 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3271 | } |
3272 | ||
55ebaef1 NT |
3273 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3274 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3275 | { |
6f704992 YH |
3276 | u32 flags; |
3277 | clock_t expires; | |
4bed72e4 | 3278 | unsigned long timeout; |
46d48046 | 3279 | |
081bba5b NT |
3280 | if (!valid_lft || (prefered_lft > valid_lft)) |
3281 | return -EINVAL; | |
3282 | ||
4bed72e4 YH |
3283 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3284 | if (addrconf_finite_timeout(timeout)) { | |
3285 | expires = jiffies_to_clock_t(timeout * HZ); | |
3286 | valid_lft = timeout; | |
6f704992 | 3287 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3288 | } else { |
3289 | expires = 0; | |
3290 | flags = 0; | |
3291 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3292 | } |
081bba5b | 3293 | |
4bed72e4 YH |
3294 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3295 | if (addrconf_finite_timeout(timeout)) { | |
3296 | if (timeout == 0) | |
3297 | ifa_flags |= IFA_F_DEPRECATED; | |
3298 | prefered_lft = timeout; | |
3299 | } | |
081bba5b NT |
3300 | |
3301 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3302 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3303 | ifp->tstamp = jiffies; |
3304 | ifp->valid_lft = valid_lft; | |
3305 | ifp->prefered_lft = prefered_lft; | |
3306 | ||
3307 | spin_unlock_bh(&ifp->lock); | |
3308 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3309 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3310 | |
46d48046 | 3311 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3312 | expires, flags); |
081bba5b NT |
3313 | addrconf_verify(0); |
3314 | ||
3315 | return 0; | |
3316 | } | |
3317 | ||
1da177e4 LT |
3318 | static int |
3319 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3320 | { | |
3b1e0a65 | 3321 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3322 | struct ifaddrmsg *ifm; |
3323 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3324 | struct in6_addr *pfx; |
7198f8ce TG |
3325 | struct inet6_ifaddr *ifa; |
3326 | struct net_device *dev; | |
55ebaef1 NT |
3327 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3328 | u8 ifa_flags; | |
461d8837 | 3329 | int err; |
1da177e4 | 3330 | |
461d8837 TG |
3331 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3332 | if (err < 0) | |
3333 | return err; | |
3334 | ||
3335 | ifm = nlmsg_data(nlh); | |
3336 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3337 | if (pfx == NULL) |
3338 | return -EINVAL; | |
3339 | ||
461d8837 | 3340 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3341 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3342 | |
3343 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3344 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3345 | preferred_lft = ci->ifa_prefered; |
3346 | } else { | |
3347 | preferred_lft = INFINITY_LIFE_TIME; | |
3348 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3349 | } |
3350 | ||
af284937 | 3351 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3352 | if (dev == NULL) |
3353 | return -ENODEV; | |
3354 | ||
55ebaef1 | 3355 | /* We ignore other flags so far. */ |
3b9f9a1c | 3356 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3357 | |
1cab3da6 | 3358 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3359 | if (ifa == NULL) { |
3360 | /* | |
3361 | * It would be best to check for !NLM_F_CREATE here but | |
3362 | * userspace alreay relies on not having to provide this. | |
3363 | */ | |
af284937 DL |
3364 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3365 | ifm->ifa_prefixlen, ifa_flags, | |
3366 | preferred_lft, valid_lft); | |
081bba5b NT |
3367 | } |
3368 | ||
7198f8ce TG |
3369 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3370 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3371 | err = -EEXIST; | |
3372 | else | |
55ebaef1 | 3373 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3374 | |
3375 | in6_ifa_put(ifa); | |
3376 | ||
3377 | return err; | |
1da177e4 LT |
3378 | } |
3379 | ||
101bb229 TG |
3380 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3381 | u8 scope, int ifindex) | |
3382 | { | |
3383 | struct ifaddrmsg *ifm; | |
3384 | ||
3385 | ifm = nlmsg_data(nlh); | |
3386 | ifm->ifa_family = AF_INET6; | |
3387 | ifm->ifa_prefixlen = prefixlen; | |
3388 | ifm->ifa_flags = flags; | |
3389 | ifm->ifa_scope = scope; | |
3390 | ifm->ifa_index = ifindex; | |
3391 | } | |
3392 | ||
85486af0 TG |
3393 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3394 | unsigned long tstamp, u32 preferred, u32 valid) | |
3395 | { | |
3396 | struct ifa_cacheinfo ci; | |
3397 | ||
3398 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3399 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3400 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3401 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3402 | ci.ifa_prefered = preferred; | |
3403 | ci.ifa_valid = valid; | |
3404 | ||
3405 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3406 | } | |
3407 | ||
101bb229 TG |
3408 | static inline int rt_scope(int ifa_scope) |
3409 | { | |
3410 | if (ifa_scope & IFA_HOST) | |
3411 | return RT_SCOPE_HOST; | |
3412 | else if (ifa_scope & IFA_LINK) | |
3413 | return RT_SCOPE_LINK; | |
3414 | else if (ifa_scope & IFA_SITE) | |
3415 | return RT_SCOPE_SITE; | |
3416 | else | |
3417 | return RT_SCOPE_UNIVERSE; | |
3418 | } | |
3419 | ||
0ab6803b TG |
3420 | static inline int inet6_ifaddr_msgsize(void) |
3421 | { | |
339bf98f TG |
3422 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3423 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3424 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3425 | } |
c5396a31 | 3426 | |
1da177e4 | 3427 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3428 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3429 | { |
1da177e4 | 3430 | struct nlmsghdr *nlh; |
85486af0 | 3431 | u32 preferred, valid; |
1da177e4 | 3432 | |
0ab6803b TG |
3433 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3434 | if (nlh == NULL) | |
26932566 | 3435 | return -EMSGSIZE; |
0ab6803b | 3436 | |
101bb229 TG |
3437 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3438 | ifa->idev->dev->ifindex); | |
3439 | ||
1da177e4 | 3440 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3441 | preferred = ifa->prefered_lft; |
3442 | valid = ifa->valid_lft; | |
3443 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3444 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3445 | if (preferred > tval) |
3446 | preferred -= tval; | |
3447 | else | |
3448 | preferred = 0; | |
85486af0 TG |
3449 | if (valid != INFINITY_LIFE_TIME) |
3450 | valid -= tval; | |
1da177e4 LT |
3451 | } |
3452 | } else { | |
85486af0 TG |
3453 | preferred = INFINITY_LIFE_TIME; |
3454 | valid = INFINITY_LIFE_TIME; | |
3455 | } | |
3456 | ||
0ab6803b | 3457 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3458 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3459 | nlmsg_cancel(skb, nlh); | |
3460 | return -EMSGSIZE; | |
3461 | } | |
1da177e4 | 3462 | |
0ab6803b | 3463 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3464 | } |
3465 | ||
3466 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3467 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3468 | { |
1da177e4 | 3469 | struct nlmsghdr *nlh; |
101bb229 TG |
3470 | u8 scope = RT_SCOPE_UNIVERSE; |
3471 | int ifindex = ifmca->idev->dev->ifindex; | |
3472 | ||
3473 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3474 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3475 | |
0ab6803b TG |
3476 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3477 | if (nlh == NULL) | |
26932566 | 3478 | return -EMSGSIZE; |
85486af0 | 3479 | |
0ab6803b TG |
3480 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3481 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3482 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3483 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3484 | nlmsg_cancel(skb, nlh); | |
3485 | return -EMSGSIZE; | |
3486 | } | |
85486af0 | 3487 | |
0ab6803b | 3488 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3489 | } |
3490 | ||
3491 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3492 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3493 | { |
1da177e4 | 3494 | struct nlmsghdr *nlh; |
101bb229 TG |
3495 | u8 scope = RT_SCOPE_UNIVERSE; |
3496 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3497 | ||
3498 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3499 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3500 | |
0ab6803b TG |
3501 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3502 | if (nlh == NULL) | |
26932566 | 3503 | return -EMSGSIZE; |
85486af0 | 3504 | |
0ab6803b TG |
3505 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3506 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3507 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3508 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3509 | nlmsg_cancel(skb, nlh); | |
3510 | return -EMSGSIZE; | |
3511 | } | |
1da177e4 | 3512 | |
0ab6803b | 3513 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3514 | } |
3515 | ||
e21e8467 | 3516 | enum addr_type_t { |
1da177e4 LT |
3517 | UNICAST_ADDR, |
3518 | MULTICAST_ADDR, | |
3519 | ANYCAST_ADDR, | |
3520 | }; | |
3521 | ||
234b27c3 ED |
3522 | /* called with rcu_read_lock() */ |
3523 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3524 | struct netlink_callback *cb, enum addr_type_t type, | |
3525 | int s_ip_idx, int *p_ip_idx) | |
3526 | { | |
234b27c3 ED |
3527 | struct ifmcaddr6 *ifmca; |
3528 | struct ifacaddr6 *ifaca; | |
3529 | int err = 1; | |
3530 | int ip_idx = *p_ip_idx; | |
3531 | ||
3532 | read_lock_bh(&idev->lock); | |
3533 | switch (type) { | |
502a2ffd | 3534 | case UNICAST_ADDR: { |
3535 | struct inet6_ifaddr *ifa; | |
3536 | ||
234b27c3 | 3537 | /* unicast address incl. temp addr */ |
502a2ffd | 3538 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3539 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3540 | continue; |
3541 | err = inet6_fill_ifaddr(skb, ifa, | |
3542 | NETLINK_CB(cb->skb).pid, | |
3543 | cb->nlh->nlmsg_seq, | |
3544 | RTM_NEWADDR, | |
3545 | NLM_F_MULTI); | |
3546 | if (err <= 0) | |
3547 | break; | |
3548 | } | |
3549 | break; | |
502a2ffd | 3550 | } |
234b27c3 ED |
3551 | case MULTICAST_ADDR: |
3552 | /* multicast address */ | |
3553 | for (ifmca = idev->mc_list; ifmca; | |
3554 | ifmca = ifmca->next, ip_idx++) { | |
3555 | if (ip_idx < s_ip_idx) | |
3556 | continue; | |
3557 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3558 | NETLINK_CB(cb->skb).pid, | |
3559 | cb->nlh->nlmsg_seq, | |
3560 | RTM_GETMULTICAST, | |
3561 | NLM_F_MULTI); | |
3562 | if (err <= 0) | |
3563 | break; | |
3564 | } | |
3565 | break; | |
3566 | case ANYCAST_ADDR: | |
3567 | /* anycast address */ | |
3568 | for (ifaca = idev->ac_list; ifaca; | |
3569 | ifaca = ifaca->aca_next, ip_idx++) { | |
3570 | if (ip_idx < s_ip_idx) | |
3571 | continue; | |
3572 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3573 | NETLINK_CB(cb->skb).pid, | |
3574 | cb->nlh->nlmsg_seq, | |
3575 | RTM_GETANYCAST, | |
3576 | NLM_F_MULTI); | |
3577 | if (err <= 0) | |
3578 | break; | |
3579 | } | |
3580 | break; | |
3581 | default: | |
3582 | break; | |
3583 | } | |
3584 | read_unlock_bh(&idev->lock); | |
3585 | *p_ip_idx = ip_idx; | |
3586 | return err; | |
3587 | } | |
3588 | ||
1da177e4 LT |
3589 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3590 | enum addr_type_t type) | |
3591 | { | |
234b27c3 ED |
3592 | struct net *net = sock_net(skb->sk); |
3593 | int h, s_h; | |
1da177e4 LT |
3594 | int idx, ip_idx; |
3595 | int s_idx, s_ip_idx; | |
1da177e4 | 3596 | struct net_device *dev; |
234b27c3 ED |
3597 | struct inet6_dev *idev; |
3598 | struct hlist_head *head; | |
3599 | struct hlist_node *node; | |
1ab1457c | 3600 | |
234b27c3 ED |
3601 | s_h = cb->args[0]; |
3602 | s_idx = idx = cb->args[1]; | |
3603 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3604 | |
234b27c3 ED |
3605 | rcu_read_lock(); |
3606 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3607 | idx = 0; | |
3608 | head = &net->dev_index_head[h]; | |
3609 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3610 | if (idx < s_idx) | |
3611 | goto cont; | |
4b97efdf | 3612 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
3613 | s_ip_idx = 0; |
3614 | ip_idx = 0; | |
e21e8467 SH |
3615 | idev = __in6_dev_get(dev); |
3616 | if (!idev) | |
234b27c3 ED |
3617 | goto cont; |
3618 | ||
3619 | if (in6_dump_addrs(idev, skb, cb, type, | |
3620 | s_ip_idx, &ip_idx) <= 0) | |
3621 | goto done; | |
7562f876 | 3622 | cont: |
234b27c3 ED |
3623 | idx++; |
3624 | } | |
1da177e4 | 3625 | } |
234b27c3 ED |
3626 | done: |
3627 | rcu_read_unlock(); | |
3628 | cb->args[0] = h; | |
3629 | cb->args[1] = idx; | |
3630 | cb->args[2] = ip_idx; | |
3631 | ||
1da177e4 LT |
3632 | return skb->len; |
3633 | } | |
3634 | ||
3635 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3636 | { | |
3637 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3638 | |
1da177e4 LT |
3639 | return inet6_dump_addr(skb, cb, type); |
3640 | } | |
3641 | ||
3642 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3643 | { | |
3644 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3645 | |
1da177e4 LT |
3646 | return inet6_dump_addr(skb, cb, type); |
3647 | } | |
3648 | ||
3649 | ||
3650 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3651 | { | |
3652 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3653 | |
1da177e4 LT |
3654 | return inet6_dump_addr(skb, cb, type); |
3655 | } | |
3656 | ||
1b29fc2c TG |
3657 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3658 | void *arg) | |
6c223828 | 3659 | { |
3b1e0a65 | 3660 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3661 | struct ifaddrmsg *ifm; |
3662 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3663 | struct in6_addr *addr = NULL; |
3664 | struct net_device *dev = NULL; | |
3665 | struct inet6_ifaddr *ifa; | |
3666 | struct sk_buff *skb; | |
6c223828 NT |
3667 | int err; |
3668 | ||
1b29fc2c TG |
3669 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3670 | if (err < 0) | |
3671 | goto errout; | |
3672 | ||
3673 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3674 | if (addr == NULL) { | |
3675 | err = -EINVAL; | |
3676 | goto errout; | |
6c223828 | 3677 | } |
6c223828 | 3678 | |
1b29fc2c | 3679 | ifm = nlmsg_data(nlh); |
6c223828 | 3680 | if (ifm->ifa_index) |
6fda7350 | 3681 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3682 | |
e21e8467 SH |
3683 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3684 | if (!ifa) { | |
1b29fc2c TG |
3685 | err = -EADDRNOTAVAIL; |
3686 | goto errout; | |
3687 | } | |
6c223828 | 3688 | |
e21e8467 SH |
3689 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3690 | if (!skb) { | |
6c223828 | 3691 | err = -ENOBUFS; |
1b29fc2c | 3692 | goto errout_ifa; |
6c223828 NT |
3693 | } |
3694 | ||
6c223828 NT |
3695 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3696 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3697 | if (err < 0) { |
3698 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3699 | WARN_ON(err == -EMSGSIZE); | |
3700 | kfree_skb(skb); | |
3701 | goto errout_ifa; | |
3702 | } | |
6fda7350 | 3703 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3704 | errout_ifa: |
6c223828 | 3705 | in6_ifa_put(ifa); |
1b29fc2c | 3706 | errout: |
6c223828 | 3707 | return err; |
6c223828 NT |
3708 | } |
3709 | ||
1da177e4 LT |
3710 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3711 | { | |
3712 | struct sk_buff *skb; | |
c346dca1 | 3713 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3714 | int err = -ENOBUFS; |
1da177e4 | 3715 | |
0ab6803b | 3716 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3717 | if (skb == NULL) |
3718 | goto errout; | |
3719 | ||
3720 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3721 | if (err < 0) { |
3722 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3723 | WARN_ON(err == -EMSGSIZE); | |
3724 | kfree_skb(skb); | |
3725 | goto errout; | |
3726 | } | |
1ce85fe4 PNA |
3727 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3728 | return; | |
5d620266 TG |
3729 | errout: |
3730 | if (err < 0) | |
6fda7350 | 3731 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3732 | } |
3733 | ||
b6f99a21 | 3734 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3735 | __s32 *array, int bytes) |
3736 | { | |
04561c1f TG |
3737 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3738 | ||
1da177e4 LT |
3739 | memset(array, 0, bytes); |
3740 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3741 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3742 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3743 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3744 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3745 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3746 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3747 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3748 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3749 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3750 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3751 | #ifdef CONFIG_IPV6_PRIVACY | |
3752 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3753 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3754 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3755 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3756 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3757 | #endif | |
3758 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3759 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3760 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3761 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3762 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3763 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3764 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3765 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3766 | #endif | |
930d6ff2 | 3767 | #endif |
fbea49e1 | 3768 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3769 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3770 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3771 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3772 | #endif | |
7bc570c8 YH |
3773 | #ifdef CONFIG_IPV6_MROUTE |
3774 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3775 | #endif | |
778d80be | 3776 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3777 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3778 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3779 | } |
3780 | ||
339bf98f TG |
3781 | static inline size_t inet6_if_nlmsg_size(void) |
3782 | { | |
3783 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3784 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3785 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3786 | + nla_total_size(4) /* IFLA_MTU */ | |
3787 | + nla_total_size(4) /* IFLA_LINK */ | |
3788 | + nla_total_size( /* IFLA_PROTINFO */ | |
3789 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3790 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3791 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3792 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3793 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3794 | ); |
3795 | } | |
c5396a31 | 3796 | |
7d720c3e TH |
3797 | static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib, |
3798 | int items, int bytes) | |
7f7d9a6b HX |
3799 | { |
3800 | int i; | |
3801 | int pad = bytes - sizeof(u64) * items; | |
3802 | BUG_ON(pad < 0); | |
3803 | ||
3804 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3805 | put_unaligned(items, &stats[0]); | |
3806 | for (i = 1; i < items; i++) | |
3807 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3808 | ||
3809 | memset(&stats[items], 0, pad); | |
3810 | } | |
3811 | ||
3812 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3813 | int bytes) | |
3814 | { | |
e21e8467 | 3815 | switch (attrtype) { |
7f7d9a6b | 3816 | case IFLA_INET6_STATS: |
7d720c3e | 3817 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
7f7d9a6b HX |
3818 | break; |
3819 | case IFLA_INET6_ICMP6STATS: | |
7d720c3e | 3820 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3821 | break; |
3822 | } | |
3823 | } | |
3824 | ||
1ab1457c | 3825 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3826 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3827 | { |
04561c1f | 3828 | struct net_device *dev = idev->dev; |
bf99f1bd | 3829 | struct nlattr *nla; |
04561c1f TG |
3830 | struct ifinfomsg *hdr; |
3831 | struct nlmsghdr *nlh; | |
3832 | void *protoinfo; | |
3833 | struct ifla_cacheinfo ci; | |
3834 | ||
3835 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3836 | if (nlh == NULL) | |
26932566 | 3837 | return -EMSGSIZE; |
04561c1f TG |
3838 | |
3839 | hdr = nlmsg_data(nlh); | |
3840 | hdr->ifi_family = AF_INET6; | |
3841 | hdr->__ifi_pad = 0; | |
3842 | hdr->ifi_type = dev->type; | |
3843 | hdr->ifi_index = dev->ifindex; | |
3844 | hdr->ifi_flags = dev_get_flags(dev); | |
3845 | hdr->ifi_change = 0; | |
3846 | ||
3847 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3848 | |
3849 | if (dev->addr_len) | |
04561c1f | 3850 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3851 | |
04561c1f | 3852 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3853 | if (dev->ifindex != dev->iflink) |
04561c1f | 3854 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3855 | |
04561c1f TG |
3856 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3857 | if (protoinfo == NULL) | |
3858 | goto nla_put_failure; | |
1da177e4 | 3859 | |
04561c1f | 3860 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3861 | |
1da177e4 LT |
3862 | ci.max_reasm_len = IPV6_MAXPLEN; |
3863 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3864 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3865 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3866 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3867 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3868 | ||
bf99f1bd YH |
3869 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3870 | if (nla == NULL) | |
04561c1f | 3871 | goto nla_put_failure; |
bf99f1bd | 3872 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3873 | |
bf99f1bd YH |
3874 | /* XXX - MC not implemented */ |
3875 | ||
3876 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3877 | if (nla == NULL) | |
3878 | goto nla_put_failure; | |
3879 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3880 | ||
3881 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3882 | if (nla == NULL) | |
3883 | goto nla_put_failure; | |
3884 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3885 | |
04561c1f TG |
3886 | nla_nest_end(skb, protoinfo); |
3887 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3888 | |
04561c1f | 3889 | nla_put_failure: |
26932566 PM |
3890 | nlmsg_cancel(skb, nlh); |
3891 | return -EMSGSIZE; | |
1da177e4 LT |
3892 | } |
3893 | ||
3894 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3895 | { | |
3b1e0a65 | 3896 | struct net *net = sock_net(skb->sk); |
84d2697d | 3897 | int h, s_h; |
434a8a58 | 3898 | int idx = 0, s_idx; |
1da177e4 LT |
3899 | struct net_device *dev; |
3900 | struct inet6_dev *idev; | |
84d2697d ED |
3901 | struct hlist_head *head; |
3902 | struct hlist_node *node; | |
1da177e4 | 3903 | |
84d2697d ED |
3904 | s_h = cb->args[0]; |
3905 | s_idx = cb->args[1]; | |
3906 | ||
3907 | rcu_read_lock(); | |
3908 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3909 | idx = 0; | |
3910 | head = &net->dev_index_head[h]; | |
3911 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3912 | if (idx < s_idx) | |
3913 | goto cont; | |
3914 | idev = __in6_dev_get(dev); | |
3915 | if (!idev) | |
3916 | goto cont; | |
3917 | if (inet6_fill_ifinfo(skb, idev, | |
3918 | NETLINK_CB(cb->skb).pid, | |
3919 | cb->nlh->nlmsg_seq, | |
3920 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
3921 | goto out; | |
7562f876 | 3922 | cont: |
84d2697d ED |
3923 | idx++; |
3924 | } | |
1da177e4 | 3925 | } |
84d2697d ED |
3926 | out: |
3927 | rcu_read_unlock(); | |
3928 | cb->args[1] = idx; | |
3929 | cb->args[0] = h; | |
1da177e4 LT |
3930 | |
3931 | return skb->len; | |
3932 | } | |
3933 | ||
3934 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3935 | { | |
3936 | struct sk_buff *skb; | |
c346dca1 | 3937 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3938 | int err = -ENOBUFS; |
1ab1457c | 3939 | |
339bf98f | 3940 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3941 | if (skb == NULL) |
3942 | goto errout; | |
3943 | ||
3944 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3945 | if (err < 0) { |
3946 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3947 | WARN_ON(err == -EMSGSIZE); | |
3948 | kfree_skb(skb); | |
3949 | goto errout; | |
3950 | } | |
1ce85fe4 PNA |
3951 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3952 | return; | |
8d7a76c9 TG |
3953 | errout: |
3954 | if (err < 0) | |
6fda7350 | 3955 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3956 | } |
3957 | ||
339bf98f TG |
3958 | static inline size_t inet6_prefix_nlmsg_size(void) |
3959 | { | |
3960 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3961 | + nla_total_size(sizeof(struct in6_addr)) | |
3962 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3963 | } | |
c5396a31 | 3964 | |
1da177e4 | 3965 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3966 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3967 | int event, unsigned int flags) | |
1da177e4 | 3968 | { |
6051e2f4 TG |
3969 | struct prefixmsg *pmsg; |
3970 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3971 | struct prefix_cacheinfo ci; |
3972 | ||
6051e2f4 TG |
3973 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3974 | if (nlh == NULL) | |
26932566 | 3975 | return -EMSGSIZE; |
6051e2f4 TG |
3976 | |
3977 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3978 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3979 | pmsg->prefix_pad1 = 0; |
3980 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3981 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3982 | pmsg->prefix_len = pinfo->prefix_len; | |
3983 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3984 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3985 | pmsg->prefix_flags = 0; |
3986 | if (pinfo->onlink) | |
3987 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3988 | if (pinfo->autoconf) | |
3989 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3990 | ||
6051e2f4 | 3991 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3992 | |
3993 | ci.preferred_time = ntohl(pinfo->prefered); | |
3994 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3995 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3996 | |
6051e2f4 | 3997 | return nlmsg_end(skb, nlh); |
1da177e4 | 3998 | |
6051e2f4 | 3999 | nla_put_failure: |
26932566 PM |
4000 | nlmsg_cancel(skb, nlh); |
4001 | return -EMSGSIZE; | |
1da177e4 LT |
4002 | } |
4003 | ||
1ab1457c | 4004 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4005 | struct prefix_info *pinfo) |
4006 | { | |
4007 | struct sk_buff *skb; | |
c346dca1 | 4008 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4009 | int err = -ENOBUFS; |
1da177e4 | 4010 | |
339bf98f | 4011 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4012 | if (skb == NULL) |
4013 | goto errout; | |
4014 | ||
4015 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4016 | if (err < 0) { |
4017 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4018 | WARN_ON(err == -EMSGSIZE); | |
4019 | kfree_skb(skb); | |
4020 | goto errout; | |
4021 | } | |
1ce85fe4 PNA |
4022 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4023 | return; | |
8c384bfa TG |
4024 | errout: |
4025 | if (err < 0) | |
6fda7350 | 4026 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4027 | } |
4028 | ||
1da177e4 LT |
4029 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4030 | { | |
4031 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4032 | ||
4033 | switch (event) { | |
4034 | case RTM_NEWADDR: | |
95c385b4 NH |
4035 | /* |
4036 | * If the address was optimistic | |
4037 | * we inserted the route at the start of | |
4038 | * our DAD process, so we don't need | |
4039 | * to do it again | |
4040 | */ | |
4041 | if (!(ifp->rt->rt6i_node)) | |
4042 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4043 | if (ifp->idev->cnf.forwarding) |
4044 | addrconf_join_anycast(ifp); | |
4045 | break; | |
4046 | case RTM_DELADDR: | |
4047 | if (ifp->idev->cnf.forwarding) | |
4048 | addrconf_leave_anycast(ifp); | |
4049 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
4050 | dst_hold(&ifp->rt->u.dst); | |
93fa159a | 4051 | |
4052 | if (ifp->dead && ip6_del_rt(ifp->rt)) | |
1da177e4 | 4053 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
4054 | break; |
4055 | } | |
4056 | } | |
4057 | ||
4058 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4059 | { | |
8814c4b5 | 4060 | rcu_read_lock_bh(); |
1da177e4 LT |
4061 | if (likely(ifp->idev->dead == 0)) |
4062 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4063 | rcu_read_unlock_bh(); |
1da177e4 LT |
4064 | } |
4065 | ||
4066 | #ifdef CONFIG_SYSCTL | |
4067 | ||
4068 | static | |
8d65af78 | 4069 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4070 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4071 | { | |
4072 | int *valp = ctl->data; | |
4073 | int val = *valp; | |
88af182e | 4074 | loff_t pos = *ppos; |
1da177e4 LT |
4075 | int ret; |
4076 | ||
8d65af78 | 4077 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 | 4078 | |
c8fecf22 | 4079 | if (write) |
b325fddb | 4080 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4081 | if (ret) |
4082 | *ppos = pos; | |
1ab1457c | 4083 | return ret; |
1da177e4 LT |
4084 | } |
4085 | ||
56d417b1 BH |
4086 | static void dev_disable_change(struct inet6_dev *idev) |
4087 | { | |
4088 | if (!idev || !idev->dev) | |
4089 | return; | |
4090 | ||
4091 | if (idev->cnf.disable_ipv6) | |
4092 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4093 | else | |
4094 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4095 | } | |
4096 | ||
4097 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4098 | { | |
4099 | struct net_device *dev; | |
4100 | struct inet6_dev *idev; | |
4101 | ||
c6d14c84 ED |
4102 | rcu_read_lock(); |
4103 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4104 | idev = __in6_dev_get(dev); |
4105 | if (idev) { | |
4106 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4107 | idev->cnf.disable_ipv6 = newf; | |
4108 | if (changed) | |
4109 | dev_disable_change(idev); | |
4110 | } | |
56d417b1 | 4111 | } |
c6d14c84 | 4112 | rcu_read_unlock(); |
56d417b1 BH |
4113 | } |
4114 | ||
4115 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) | |
4116 | { | |
4117 | struct net *net; | |
4118 | ||
4119 | net = (struct net *)table->extra2; | |
4120 | ||
4121 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) | |
4122 | return 0; | |
4123 | ||
88af182e EB |
4124 | if (!rtnl_trylock()) { |
4125 | /* Restore the original values before restarting */ | |
4126 | *p = old; | |
56d417b1 | 4127 | return restart_syscall(); |
88af182e | 4128 | } |
56d417b1 BH |
4129 | |
4130 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
4131 | __s32 newf = net->ipv6.devconf_all->disable_ipv6; | |
4132 | net->ipv6.devconf_dflt->disable_ipv6 = newf; | |
4133 | addrconf_disable_change(net, newf); | |
4134 | } else if ((!*p) ^ (!old)) | |
4135 | dev_disable_change((struct inet6_dev *)table->extra1); | |
4136 | ||
4137 | rtnl_unlock(); | |
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | static | |
8d65af78 | 4142 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4143 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4144 | { | |
4145 | int *valp = ctl->data; | |
4146 | int val = *valp; | |
88af182e | 4147 | loff_t pos = *ppos; |
56d417b1 BH |
4148 | int ret; |
4149 | ||
8d65af78 | 4150 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
56d417b1 BH |
4151 | |
4152 | if (write) | |
4153 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4154 | if (ret) |
4155 | *ppos = pos; | |
56d417b1 BH |
4156 | return ret; |
4157 | } | |
4158 | ||
1da177e4 LT |
4159 | static struct addrconf_sysctl_table |
4160 | { | |
4161 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4162 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4163 | char *dev_name; |
ab32ea5d | 4164 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4165 | .sysctl_header = NULL, |
4166 | .addrconf_vars = { | |
1ab1457c | 4167 | { |
e21e8467 SH |
4168 | .procname = "forwarding", |
4169 | .data = &ipv6_devconf.forwarding, | |
4170 | .maxlen = sizeof(int), | |
4171 | .mode = 0644, | |
4172 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4173 | }, |
4174 | { | |
e21e8467 SH |
4175 | .procname = "hop_limit", |
4176 | .data = &ipv6_devconf.hop_limit, | |
4177 | .maxlen = sizeof(int), | |
4178 | .mode = 0644, | |
4179 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4180 | }, |
4181 | { | |
e21e8467 SH |
4182 | .procname = "mtu", |
4183 | .data = &ipv6_devconf.mtu6, | |
4184 | .maxlen = sizeof(int), | |
4185 | .mode = 0644, | |
4186 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4187 | }, |
4188 | { | |
e21e8467 SH |
4189 | .procname = "accept_ra", |
4190 | .data = &ipv6_devconf.accept_ra, | |
4191 | .maxlen = sizeof(int), | |
4192 | .mode = 0644, | |
4193 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4194 | }, |
4195 | { | |
e21e8467 SH |
4196 | .procname = "accept_redirects", |
4197 | .data = &ipv6_devconf.accept_redirects, | |
4198 | .maxlen = sizeof(int), | |
4199 | .mode = 0644, | |
4200 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4201 | }, |
4202 | { | |
e21e8467 SH |
4203 | .procname = "autoconf", |
4204 | .data = &ipv6_devconf.autoconf, | |
4205 | .maxlen = sizeof(int), | |
4206 | .mode = 0644, | |
4207 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4208 | }, |
4209 | { | |
e21e8467 SH |
4210 | .procname = "dad_transmits", |
4211 | .data = &ipv6_devconf.dad_transmits, | |
4212 | .maxlen = sizeof(int), | |
4213 | .mode = 0644, | |
4214 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4215 | }, |
4216 | { | |
e21e8467 SH |
4217 | .procname = "router_solicitations", |
4218 | .data = &ipv6_devconf.rtr_solicits, | |
4219 | .maxlen = sizeof(int), | |
4220 | .mode = 0644, | |
4221 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4222 | }, |
4223 | { | |
e21e8467 SH |
4224 | .procname = "router_solicitation_interval", |
4225 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4226 | .maxlen = sizeof(int), | |
4227 | .mode = 0644, | |
4228 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4229 | }, |
4230 | { | |
e21e8467 SH |
4231 | .procname = "router_solicitation_delay", |
4232 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4233 | .maxlen = sizeof(int), | |
4234 | .mode = 0644, | |
4235 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4236 | }, |
4237 | { | |
e21e8467 SH |
4238 | .procname = "force_mld_version", |
4239 | .data = &ipv6_devconf.force_mld_version, | |
4240 | .maxlen = sizeof(int), | |
4241 | .mode = 0644, | |
4242 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4243 | }, |
4244 | #ifdef CONFIG_IPV6_PRIVACY | |
4245 | { | |
e21e8467 SH |
4246 | .procname = "use_tempaddr", |
4247 | .data = &ipv6_devconf.use_tempaddr, | |
4248 | .maxlen = sizeof(int), | |
4249 | .mode = 0644, | |
4250 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4251 | }, |
4252 | { | |
e21e8467 SH |
4253 | .procname = "temp_valid_lft", |
4254 | .data = &ipv6_devconf.temp_valid_lft, | |
4255 | .maxlen = sizeof(int), | |
4256 | .mode = 0644, | |
4257 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4258 | }, |
4259 | { | |
e21e8467 SH |
4260 | .procname = "temp_prefered_lft", |
4261 | .data = &ipv6_devconf.temp_prefered_lft, | |
4262 | .maxlen = sizeof(int), | |
4263 | .mode = 0644, | |
4264 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4265 | }, |
4266 | { | |
e21e8467 SH |
4267 | .procname = "regen_max_retry", |
4268 | .data = &ipv6_devconf.regen_max_retry, | |
4269 | .maxlen = sizeof(int), | |
4270 | .mode = 0644, | |
4271 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4272 | }, |
4273 | { | |
e21e8467 SH |
4274 | .procname = "max_desync_factor", |
4275 | .data = &ipv6_devconf.max_desync_factor, | |
4276 | .maxlen = sizeof(int), | |
4277 | .mode = 0644, | |
4278 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4279 | }, |
4280 | #endif | |
4281 | { | |
e21e8467 SH |
4282 | .procname = "max_addresses", |
4283 | .data = &ipv6_devconf.max_addresses, | |
4284 | .maxlen = sizeof(int), | |
4285 | .mode = 0644, | |
4286 | .proc_handler = proc_dointvec, | |
1da177e4 | 4287 | }, |
65f5c7c1 | 4288 | { |
e21e8467 SH |
4289 | .procname = "accept_ra_defrtr", |
4290 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4291 | .maxlen = sizeof(int), | |
4292 | .mode = 0644, | |
4293 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4294 | }, |
c4fd30eb | 4295 | { |
e21e8467 SH |
4296 | .procname = "accept_ra_pinfo", |
4297 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4298 | .maxlen = sizeof(int), | |
4299 | .mode = 0644, | |
4300 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4301 | }, |
930d6ff2 YH |
4302 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4303 | { | |
e21e8467 SH |
4304 | .procname = "accept_ra_rtr_pref", |
4305 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4306 | .maxlen = sizeof(int), | |
4307 | .mode = 0644, | |
4308 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4309 | }, |
52e16356 | 4310 | { |
e21e8467 SH |
4311 | .procname = "router_probe_interval", |
4312 | .data = &ipv6_devconf.rtr_probe_interval, | |
4313 | .maxlen = sizeof(int), | |
4314 | .mode = 0644, | |
4315 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4316 | }, |
fa03ef38 | 4317 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4318 | { |
e21e8467 SH |
4319 | .procname = "accept_ra_rt_info_max_plen", |
4320 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4321 | .maxlen = sizeof(int), | |
4322 | .mode = 0644, | |
4323 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4324 | }, |
4325 | #endif | |
930d6ff2 | 4326 | #endif |
fbea49e1 | 4327 | { |
e21e8467 SH |
4328 | .procname = "proxy_ndp", |
4329 | .data = &ipv6_devconf.proxy_ndp, | |
4330 | .maxlen = sizeof(int), | |
4331 | .mode = 0644, | |
4332 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4333 | }, |
0bcbc926 | 4334 | { |
e21e8467 SH |
4335 | .procname = "accept_source_route", |
4336 | .data = &ipv6_devconf.accept_source_route, | |
4337 | .maxlen = sizeof(int), | |
4338 | .mode = 0644, | |
4339 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4340 | }, |
95c385b4 NH |
4341 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4342 | { | |
e21e8467 SH |
4343 | .procname = "optimistic_dad", |
4344 | .data = &ipv6_devconf.optimistic_dad, | |
4345 | .maxlen = sizeof(int), | |
4346 | .mode = 0644, | |
4347 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4348 | |
4349 | }, | |
7bc570c8 YH |
4350 | #endif |
4351 | #ifdef CONFIG_IPV6_MROUTE | |
4352 | { | |
e21e8467 SH |
4353 | .procname = "mc_forwarding", |
4354 | .data = &ipv6_devconf.mc_forwarding, | |
4355 | .maxlen = sizeof(int), | |
4356 | .mode = 0444, | |
4357 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4358 | }, |
95c385b4 | 4359 | #endif |
778d80be | 4360 | { |
e21e8467 SH |
4361 | .procname = "disable_ipv6", |
4362 | .data = &ipv6_devconf.disable_ipv6, | |
4363 | .maxlen = sizeof(int), | |
4364 | .mode = 0644, | |
4365 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4366 | }, |
1b34be74 | 4367 | { |
e21e8467 SH |
4368 | .procname = "accept_dad", |
4369 | .data = &ipv6_devconf.accept_dad, | |
4370 | .maxlen = sizeof(int), | |
4371 | .mode = 0644, | |
4372 | .proc_handler = proc_dointvec, | |
1b34be74 | 4373 | }, |
f7734fdf | 4374 | { |
f7734fdf OP |
4375 | .procname = "force_tllao", |
4376 | .data = &ipv6_devconf.force_tllao, | |
4377 | .maxlen = sizeof(int), | |
4378 | .mode = 0644, | |
4379 | .proc_handler = proc_dointvec | |
4380 | }, | |
1da177e4 | 4381 | { |
f8572d8f | 4382 | /* sentinel */ |
1da177e4 LT |
4383 | } |
4384 | }, | |
1da177e4 LT |
4385 | }; |
4386 | ||
bff16c2f | 4387 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4388 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4389 | { |
4390 | int i; | |
1da177e4 | 4391 | struct addrconf_sysctl_table *t; |
1da177e4 | 4392 | |
1dab6222 PE |
4393 | #define ADDRCONF_CTL_PATH_DEV 3 |
4394 | ||
4395 | struct ctl_path addrconf_ctl_path[] = { | |
f8572d8f EB |
4396 | { .procname = "net", }, |
4397 | { .procname = "ipv6", }, | |
4398 | { .procname = "conf", }, | |
1dab6222 PE |
4399 | { /* to be set */ }, |
4400 | { }, | |
4401 | }; | |
4402 | ||
4403 | ||
af879cc7 | 4404 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4405 | if (t == NULL) |
f68635e6 PE |
4406 | goto out; |
4407 | ||
bcdd553f | 4408 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4409 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4410 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4411 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4412 | } |
1da177e4 | 4413 | |
1ab1457c YH |
4414 | /* |
4415 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4416 | * by sysctl and we wouldn't want anyone to change it under our feet |
4417 | * (see SIOCSIFNAME). | |
1ab1457c | 4418 | */ |
1dab6222 PE |
4419 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4420 | if (!t->dev_name) | |
f68635e6 | 4421 | goto free; |
1da177e4 | 4422 | |
1dab6222 | 4423 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
1da177e4 | 4424 | |
bff16c2f | 4425 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4426 | t->addrconf_vars); |
1da177e4 LT |
4427 | if (t->sysctl_header == NULL) |
4428 | goto free_procname; | |
f68635e6 PE |
4429 | |
4430 | p->sysctl = t; | |
95897312 | 4431 | return 0; |
1da177e4 | 4432 | |
f68635e6 | 4433 | free_procname: |
1dab6222 | 4434 | kfree(t->dev_name); |
f68635e6 | 4435 | free: |
1da177e4 | 4436 | kfree(t); |
f68635e6 | 4437 | out: |
95897312 | 4438 | return -ENOBUFS; |
1da177e4 LT |
4439 | } |
4440 | ||
408c4768 PE |
4441 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4442 | { | |
4443 | struct addrconf_sysctl_table *t; | |
4444 | ||
4445 | if (p->sysctl == NULL) | |
4446 | return; | |
4447 | ||
4448 | t = p->sysctl; | |
4449 | p->sysctl = NULL; | |
4450 | unregister_sysctl_table(t->sysctl_header); | |
4451 | kfree(t->dev_name); | |
4452 | kfree(t); | |
4453 | } | |
4454 | ||
f52295a9 PE |
4455 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4456 | { | |
54716e3b | 4457 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4458 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4459 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4460 | idev, &idev->cnf); |
f52295a9 PE |
4461 | } |
4462 | ||
408c4768 | 4463 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4464 | { |
408c4768 PE |
4465 | __addrconf_sysctl_unregister(&idev->cnf); |
4466 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4467 | } |
4468 | ||
4469 | ||
4470 | #endif | |
4471 | ||
2c8c1e72 | 4472 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4473 | { |
4474 | int err; | |
4475 | struct ipv6_devconf *all, *dflt; | |
4476 | ||
4477 | err = -ENOMEM; | |
4478 | all = &ipv6_devconf; | |
4479 | dflt = &ipv6_devconf_dflt; | |
4480 | ||
09ad9bc7 | 4481 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4482 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4483 | if (all == NULL) | |
4484 | goto err_alloc_all; | |
4485 | ||
4486 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4487 | if (dflt == NULL) | |
4488 | goto err_alloc_dflt; | |
56d417b1 BH |
4489 | } else { |
4490 | /* these will be inherited by all namespaces */ | |
4491 | dflt->autoconf = ipv6_defaults.autoconf; | |
4492 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4493 | } |
4494 | ||
4495 | net->ipv6.devconf_all = all; | |
4496 | net->ipv6.devconf_dflt = dflt; | |
4497 | ||
4498 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4499 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4500 | if (err < 0) |
4501 | goto err_reg_all; | |
4502 | ||
f8572d8f | 4503 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4504 | if (err < 0) |
4505 | goto err_reg_dflt; | |
4506 | #endif | |
4507 | return 0; | |
4508 | ||
4509 | #ifdef CONFIG_SYSCTL | |
4510 | err_reg_dflt: | |
4511 | __addrconf_sysctl_unregister(all); | |
4512 | err_reg_all: | |
4513 | kfree(dflt); | |
4514 | #endif | |
4515 | err_alloc_dflt: | |
4516 | kfree(all); | |
4517 | err_alloc_all: | |
4518 | return err; | |
4519 | } | |
4520 | ||
2c8c1e72 | 4521 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4522 | { |
4523 | #ifdef CONFIG_SYSCTL | |
4524 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4525 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4526 | #endif | |
09ad9bc7 | 4527 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4528 | kfree(net->ipv6.devconf_dflt); |
4529 | kfree(net->ipv6.devconf_all); | |
4530 | } | |
4531 | } | |
4532 | ||
4533 | static struct pernet_operations addrconf_ops = { | |
4534 | .init = addrconf_init_net, | |
4535 | .exit = addrconf_exit_net, | |
4536 | }; | |
4537 | ||
1da177e4 LT |
4538 | /* |
4539 | * Device notifier | |
4540 | */ | |
4541 | ||
4542 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4543 | { | |
1ab1457c | 4544 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4545 | } |
7159039a YH |
4546 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4547 | ||
1da177e4 LT |
4548 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4549 | { | |
e21e8467 | 4550 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4551 | } |
7159039a YH |
4552 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4553 | ||
1da177e4 LT |
4554 | /* |
4555 | * Init / cleanup code | |
4556 | */ | |
4557 | ||
4558 | int __init addrconf_init(void) | |
4559 | { | |
c2e21293 | 4560 | int i, err; |
2a8cc6c8 | 4561 | |
e21e8467 SH |
4562 | err = ipv6_addr_label_init(); |
4563 | if (err < 0) { | |
4564 | printk(KERN_CRIT "IPv6 Addrconf:" | |
4565 | " cannot initialize default policy table: %d.\n", err); | |
2a8cc6c8 YH |
4566 | return err; |
4567 | } | |
1da177e4 | 4568 | |
e0da5a48 PE |
4569 | register_pernet_subsys(&addrconf_ops); |
4570 | ||
1da177e4 LT |
4571 | /* The addrconf netdev notifier requires that loopback_dev |
4572 | * has it's ipv6 private information allocated and setup | |
4573 | * before it can bring up and give link-local addresses | |
4574 | * to other devices which are up. | |
4575 | * | |
4576 | * Unfortunately, loopback_dev is not necessarily the first | |
4577 | * entry in the global dev_base list of net devices. In fact, | |
4578 | * it is likely to be the very last entry on that list. | |
4579 | * So this causes the notifier registry below to try and | |
4580 | * give link-local addresses to all devices besides loopback_dev | |
4581 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4582 | * devices to fail to get a link-local address. | |
4583 | * | |
4584 | * So, as a temporary fix, allocate the ipv6 structure for | |
4585 | * loopback_dev first by hand. | |
4586 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4587 | * device and it being up should be removed. | |
4588 | */ | |
4589 | rtnl_lock(); | |
2774c7ab | 4590 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4591 | err = -ENOMEM; |
4592 | rtnl_unlock(); | |
4593 | if (err) | |
e0da5a48 | 4594 | goto errlo; |
1da177e4 | 4595 | |
c2e21293 | 4596 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4597 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4598 | ||
1da177e4 LT |
4599 | register_netdevice_notifier(&ipv6_dev_notf); |
4600 | ||
1da177e4 | 4601 | addrconf_verify(0); |
c127ea2c TG |
4602 | |
4603 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4604 | if (err < 0) | |
4605 | goto errout; | |
4606 | ||
4607 | /* Only the first call to __rtnl_register can fail */ | |
4608 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4609 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4610 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4611 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4612 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4613 | ||
2a8cc6c8 YH |
4614 | ipv6_addr_label_rtnl_register(); |
4615 | ||
1da177e4 | 4616 | return 0; |
c127ea2c TG |
4617 | errout: |
4618 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4619 | errlo: |
4620 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4621 | |
4622 | return err; | |
1da177e4 LT |
4623 | } |
4624 | ||
09f7709f | 4625 | void addrconf_cleanup(void) |
1da177e4 | 4626 | { |
176c39af | 4627 | struct net_device *dev; |
1da177e4 LT |
4628 | int i; |
4629 | ||
4630 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4631 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4632 | |
4633 | rtnl_lock(); | |
4634 | ||
176c39af DL |
4635 | /* clean dev list */ |
4636 | for_each_netdev(&init_net, dev) { | |
4637 | if (__in6_dev_get(dev) == NULL) | |
4638 | continue; | |
4639 | addrconf_ifdown(dev, 1); | |
4640 | } | |
4641 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4642 | ||
1da177e4 LT |
4643 | /* |
4644 | * Check hash table. | |
4645 | */ | |
5c578aed | 4646 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4647 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4648 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4649 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4650 | |
4651 | del_timer(&addr_chk_timer); | |
1da177e4 | 4652 | rtnl_unlock(); |
1da177e4 | 4653 | } |