]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/types.h> | |
a0bffffc | 43 | #include <linux/kernel.h> |
1da177e4 LT |
44 | #include <linux/socket.h> |
45 | #include <linux/sockios.h> | |
1da177e4 LT |
46 | #include <linux/net.h> |
47 | #include <linux/in6.h> | |
48 | #include <linux/netdevice.h> | |
1823730f | 49 | #include <linux/if_addr.h> |
1da177e4 LT |
50 | #include <linux/if_arp.h> |
51 | #include <linux/if_arcnet.h> | |
52 | #include <linux/if_infiniband.h> | |
53 | #include <linux/route.h> | |
54 | #include <linux/inetdevice.h> | |
55 | #include <linux/init.h> | |
56 | #ifdef CONFIG_SYSCTL | |
57 | #include <linux/sysctl.h> | |
58 | #endif | |
4fc268d2 | 59 | #include <linux/capability.h> |
1da177e4 LT |
60 | #include <linux/delay.h> |
61 | #include <linux/notifier.h> | |
543537bd | 62 | #include <linux/string.h> |
1da177e4 | 63 | |
457c4cbc | 64 | #include <net/net_namespace.h> |
1da177e4 LT |
65 | #include <net/sock.h> |
66 | #include <net/snmp.h> | |
67 | ||
68 | #include <net/ipv6.h> | |
69 | #include <net/protocol.h> | |
70 | #include <net/ndisc.h> | |
71 | #include <net/ip6_route.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/tcp.h> | |
74 | #include <net/ip.h> | |
5d620266 | 75 | #include <net/netlink.h> |
f24e3d65 | 76 | #include <net/pkt_sched.h> |
1da177e4 LT |
77 | #include <linux/if_tunnel.h> |
78 | #include <linux/rtnetlink.h> | |
79 | ||
80 | #ifdef CONFIG_IPV6_PRIVACY | |
81 | #include <linux/random.h> | |
1da177e4 LT |
82 | #endif |
83 | ||
84 | #include <asm/uaccess.h> | |
7f7d9a6b | 85 | #include <asm/unaligned.h> |
1da177e4 LT |
86 | |
87 | #include <linux/proc_fs.h> | |
88 | #include <linux/seq_file.h> | |
89 | ||
90 | /* Set to 3 to get tracing... */ | |
91 | #define ACONF_DEBUG 2 | |
92 | ||
93 | #if ACONF_DEBUG >= 3 | |
94 | #define ADBG(x) printk x | |
95 | #else | |
96 | #define ADBG(x) | |
97 | #endif | |
98 | ||
99 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
100 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
101 | ||
102 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 103 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
104 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
105 | #else | |
106 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
107 | { | |
108 | } | |
109 | ||
110 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
111 | { | |
112 | } | |
1da177e4 LT |
113 | #endif |
114 | ||
115 | #ifdef CONFIG_IPV6_PRIVACY | |
116 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 117 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
118 | static void ipv6_regen_rndid(unsigned long data); |
119 | ||
120 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
121 | #endif |
122 | ||
1b34be74 | 123 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
124 | static int ipv6_count_addresses(struct inet6_dev *idev); |
125 | ||
126 | /* | |
127 | * Configured unicast address hash table | |
128 | */ | |
129 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
130 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
131 | ||
1da177e4 LT |
132 | static void addrconf_verify(unsigned long); |
133 | ||
8d06afab | 134 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
135 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
136 | ||
137 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
138 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
139 | ||
93d9b7d7 JP |
140 | static void addrconf_type_change(struct net_device *dev, |
141 | unsigned long event); | |
1da177e4 LT |
142 | static int addrconf_ifdown(struct net_device *dev, int how); |
143 | ||
e431b8c0 | 144 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
145 | static void addrconf_dad_timer(unsigned long data); |
146 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 147 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
148 | static void addrconf_rs_timer(unsigned long data); |
149 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
150 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
151 | ||
1ab1457c | 152 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 153 | struct prefix_info *pinfo); |
06bfe655 DL |
154 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
155 | struct net_device *dev); | |
1da177e4 | 156 | |
e041c683 | 157 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 158 | |
888c848e | 159 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
160 | .forwarding = 0, |
161 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
162 | .mtu6 = IPV6_MIN_MTU, | |
163 | .accept_ra = 1, | |
164 | .accept_redirects = 1, | |
165 | .autoconf = 1, | |
166 | .force_mld_version = 0, | |
167 | .dad_transmits = 1, | |
168 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
169 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
170 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
171 | #ifdef CONFIG_IPV6_PRIVACY | |
172 | .use_tempaddr = 0, | |
173 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
174 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
175 | .regen_max_retry = REGEN_MAX_RETRY, | |
176 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
177 | #endif | |
178 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 179 | .accept_ra_defrtr = 1, |
c4fd30eb | 180 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
181 | #ifdef CONFIG_IPV6_ROUTER_PREF |
182 | .accept_ra_rtr_pref = 1, | |
52e16356 | 183 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
184 | #ifdef CONFIG_IPV6_ROUTE_INFO |
185 | .accept_ra_rt_info_max_plen = 0, | |
186 | #endif | |
930d6ff2 | 187 | #endif |
fbea49e1 | 188 | .proxy_ndp = 0, |
0bcbc926 | 189 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 190 | .disable_ipv6 = 0, |
1b34be74 | 191 | .accept_dad = 1, |
1da177e4 LT |
192 | }; |
193 | ||
ab32ea5d | 194 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
195 | .forwarding = 0, |
196 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
197 | .mtu6 = IPV6_MIN_MTU, | |
198 | .accept_ra = 1, | |
199 | .accept_redirects = 1, | |
200 | .autoconf = 1, | |
201 | .dad_transmits = 1, | |
202 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
203 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
204 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
205 | #ifdef CONFIG_IPV6_PRIVACY | |
206 | .use_tempaddr = 0, | |
207 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
208 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
209 | .regen_max_retry = REGEN_MAX_RETRY, | |
210 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
211 | #endif | |
212 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 213 | .accept_ra_defrtr = 1, |
c4fd30eb | 214 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
215 | #ifdef CONFIG_IPV6_ROUTER_PREF |
216 | .accept_ra_rtr_pref = 1, | |
52e16356 | 217 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
218 | #ifdef CONFIG_IPV6_ROUTE_INFO |
219 | .accept_ra_rt_info_max_plen = 0, | |
220 | #endif | |
930d6ff2 | 221 | #endif |
fbea49e1 | 222 | .proxy_ndp = 0, |
0bcbc926 | 223 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 224 | .disable_ipv6 = 0, |
1b34be74 | 225 | .accept_dad = 1, |
1da177e4 LT |
226 | }; |
227 | ||
228 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 229 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 230 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
231 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
232 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 233 | |
f24e3d65 | 234 | /* Check if a valid qdisc is available */ |
05297949 | 235 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 236 | { |
05297949 | 237 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
238 | } |
239 | ||
2b5ead46 YH |
240 | /* Check if a route is valid prefix route */ |
241 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
242 | { | |
243 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); | |
244 | } | |
245 | ||
1da177e4 LT |
246 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
247 | { | |
248 | if (del_timer(&ifp->timer)) | |
249 | __in6_ifa_put(ifp); | |
250 | } | |
251 | ||
252 | enum addrconf_timer_t | |
253 | { | |
254 | AC_NONE, | |
255 | AC_DAD, | |
256 | AC_RS, | |
257 | }; | |
258 | ||
259 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
260 | enum addrconf_timer_t what, | |
261 | unsigned long when) | |
262 | { | |
263 | if (!del_timer(&ifp->timer)) | |
264 | in6_ifa_hold(ifp); | |
265 | ||
266 | switch (what) { | |
267 | case AC_DAD: | |
268 | ifp->timer.function = addrconf_dad_timer; | |
269 | break; | |
270 | case AC_RS: | |
271 | ifp->timer.function = addrconf_rs_timer; | |
272 | break; | |
273 | default:; | |
274 | } | |
275 | ifp->timer.expires = jiffies + when; | |
276 | add_timer(&ifp->timer); | |
277 | } | |
278 | ||
7f7d9a6b HX |
279 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
280 | { | |
7d720c3e | 281 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
c69bce20 | 282 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b | 283 | goto err_ip; |
7d720c3e | 284 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6, |
c69bce20 | 285 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 286 | goto err_icmp; |
7d720c3e | 287 | if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg, |
c69bce20 | 288 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 289 | goto err_icmpmsg; |
7f7d9a6b HX |
290 | |
291 | return 0; | |
292 | ||
14878f75 | 293 | err_icmpmsg: |
7d720c3e | 294 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); |
7f7d9a6b | 295 | err_icmp: |
7d720c3e | 296 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 297 | err_ip: |
aaf70ec7 | 298 | return -ENOMEM; |
7f7d9a6b HX |
299 | } |
300 | ||
16910b98 | 301 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 302 | { |
7d720c3e TH |
303 | snmp_mib_free((void __percpu **)idev->stats.icmpv6msg); |
304 | snmp_mib_free((void __percpu **)idev->stats.icmpv6); | |
305 | snmp_mib_free((void __percpu **)idev->stats.ipv6); | |
7f7d9a6b HX |
306 | } |
307 | ||
1da177e4 LT |
308 | /* Nobody refers to this device, we may destroy it. */ |
309 | ||
8814c4b5 YH |
310 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
311 | { | |
312 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
313 | kfree(idev); | |
314 | } | |
315 | ||
1da177e4 LT |
316 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
317 | { | |
318 | struct net_device *dev = idev->dev; | |
547b792c IJ |
319 | |
320 | WARN_ON(idev->addr_list != NULL); | |
321 | WARN_ON(idev->mc_list != NULL); | |
322 | ||
1da177e4 LT |
323 | #ifdef NET_REFCNT_DEBUG |
324 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
325 | #endif | |
326 | dev_put(dev); | |
327 | if (!idev->dead) { | |
328 | printk("Freeing alive inet6 device %p\n", idev); | |
329 | return; | |
330 | } | |
331 | snmp6_free_dev(idev); | |
8814c4b5 | 332 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
333 | } |
334 | ||
7159039a YH |
335 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
336 | ||
1da177e4 LT |
337 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
338 | { | |
339 | struct inet6_dev *ndev; | |
340 | ||
341 | ASSERT_RTNL(); | |
342 | ||
343 | if (dev->mtu < IPV6_MIN_MTU) | |
344 | return NULL; | |
345 | ||
1ab1457c | 346 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 347 | |
1ab1457c YH |
348 | if (ndev == NULL) |
349 | return NULL; | |
322f74a4 IO |
350 | |
351 | rwlock_init(&ndev->lock); | |
352 | ndev->dev = dev; | |
c346dca1 | 353 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
354 | ndev->cnf.mtu6 = dev->mtu; |
355 | ndev->cnf.sysctl = NULL; | |
356 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
357 | if (ndev->nd_parms == NULL) { | |
358 | kfree(ndev); | |
359 | return NULL; | |
360 | } | |
0187bdfb BH |
361 | if (ndev->cnf.forwarding) |
362 | dev_disable_lro(dev); | |
322f74a4 IO |
363 | /* We refer to the device */ |
364 | dev_hold(dev); | |
1da177e4 | 365 | |
322f74a4 IO |
366 | if (snmp6_alloc_dev(ndev) < 0) { |
367 | ADBG((KERN_WARNING | |
368 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 369 | __func__, dev->name)); |
322f74a4 IO |
370 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
371 | ndev->dead = 1; | |
372 | in6_dev_finish_destroy(ndev); | |
373 | return NULL; | |
374 | } | |
1da177e4 | 375 | |
322f74a4 IO |
376 | if (snmp6_register_dev(ndev) < 0) { |
377 | ADBG((KERN_WARNING | |
378 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 379 | __func__, dev->name)); |
322f74a4 IO |
380 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
381 | ndev->dead = 1; | |
382 | in6_dev_finish_destroy(ndev); | |
383 | return NULL; | |
384 | } | |
385 | ||
386 | /* One reference from device. We must do this before | |
387 | * we invoke __ipv6_regen_rndid(). | |
388 | */ | |
389 | in6_dev_hold(ndev); | |
1da177e4 | 390 | |
1b34be74 YH |
391 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
392 | ndev->cnf.accept_dad = -1; | |
393 | ||
b077d7ab YH |
394 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
395 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
396 | printk(KERN_INFO | |
397 | "%s: Disabled Multicast RS\n", | |
398 | dev->name); | |
399 | ndev->cnf.rtr_solicits = 0; | |
400 | } | |
401 | #endif | |
402 | ||
1da177e4 | 403 | #ifdef CONFIG_IPV6_PRIVACY |
b24b8a24 | 404 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
405 | if ((dev->flags&IFF_LOOPBACK) || |
406 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 407 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 408 | dev->type == ARPHRD_SIT || |
0be669bb | 409 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
410 | printk(KERN_INFO |
411 | "%s: Disabled Privacy Extensions\n", | |
412 | dev->name); | |
413 | ndev->cnf.use_tempaddr = -1; | |
414 | } else { | |
415 | in6_dev_hold(ndev); | |
416 | ipv6_regen_rndid((unsigned long) ndev); | |
417 | } | |
1da177e4 LT |
418 | #endif |
419 | ||
f24e3d65 | 420 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
421 | ndev->if_flags |= IF_READY; |
422 | ||
322f74a4 IO |
423 | ipv6_mc_init_dev(ndev); |
424 | ndev->tstamp = jiffies; | |
f52295a9 | 425 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
426 | /* protected by rtnl_lock */ |
427 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
428 | |
429 | /* Join all-node multicast group */ | |
f3ee4010 | 430 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 431 | |
1da177e4 LT |
432 | return ndev; |
433 | } | |
434 | ||
cee89473 | 435 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
436 | { |
437 | struct inet6_dev *idev; | |
438 | ||
439 | ASSERT_RTNL(); | |
440 | ||
441 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
442 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
443 | return NULL; | |
444 | } | |
c5e33bdd | 445 | |
1da177e4 LT |
446 | if (dev->flags&IFF_UP) |
447 | ipv6_mc_up(idev); | |
448 | return idev; | |
449 | } | |
450 | ||
451 | #ifdef CONFIG_SYSCTL | |
452 | static void dev_forward_change(struct inet6_dev *idev) | |
453 | { | |
454 | struct net_device *dev; | |
455 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
456 | |
457 | if (!idev) | |
458 | return; | |
459 | dev = idev->dev; | |
0187bdfb BH |
460 | if (idev->cnf.forwarding) |
461 | dev_disable_lro(dev); | |
1da177e4 | 462 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 463 | if (idev->cnf.forwarding) |
f3ee4010 | 464 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 465 | else |
f3ee4010 | 466 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 LT |
467 | } |
468 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
469 | if (ifa->flags&IFA_F_TENTATIVE) |
470 | continue; | |
1da177e4 LT |
471 | if (idev->cnf.forwarding) |
472 | addrconf_join_anycast(ifa); | |
473 | else | |
474 | addrconf_leave_anycast(ifa); | |
475 | } | |
476 | } | |
477 | ||
478 | ||
e186932b | 479 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
480 | { |
481 | struct net_device *dev; | |
482 | struct inet6_dev *idev; | |
483 | ||
c6d14c84 ED |
484 | rcu_read_lock(); |
485 | for_each_netdev_rcu(net, dev) { | |
1da177e4 LT |
486 | idev = __in6_dev_get(dev); |
487 | if (idev) { | |
e186932b PE |
488 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
489 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
490 | if (changed) |
491 | dev_forward_change(idev); | |
492 | } | |
1da177e4 | 493 | } |
c6d14c84 | 494 | rcu_read_unlock(); |
1da177e4 | 495 | } |
c8fecf22 | 496 | |
b325fddb | 497 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf22 | 498 | { |
bff16c2f PE |
499 | struct net *net; |
500 | ||
501 | net = (struct net *)table->extra2; | |
441fc2a2 | 502 | if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb SH |
503 | return 0; |
504 | ||
88af182e EB |
505 | if (!rtnl_trylock()) { |
506 | /* Restore the original values before restarting */ | |
507 | *p = old; | |
5007392d | 508 | return restart_syscall(); |
88af182e | 509 | } |
c8fecf22 | 510 | |
e186932b PE |
511 | if (p == &net->ipv6.devconf_all->forwarding) { |
512 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
513 | net->ipv6.devconf_dflt->forwarding = newf; | |
514 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
515 | } else if ((!*p) ^ (!old)) |
516 | dev_forward_change((struct inet6_dev *)table->extra1); | |
0187bdfb | 517 | rtnl_unlock(); |
c8fecf22 PE |
518 | |
519 | if (*p) | |
7b4da532 | 520 | rt6_purge_dflt_routers(net); |
b325fddb | 521 | return 1; |
c8fecf22 | 522 | } |
1da177e4 LT |
523 | #endif |
524 | ||
525 | /* Nobody refers to this ifaddr, destroy it */ | |
526 | ||
527 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
528 | { | |
547b792c IJ |
529 | WARN_ON(ifp->if_next != NULL); |
530 | WARN_ON(ifp->lst_next != NULL); | |
531 | ||
1da177e4 LT |
532 | #ifdef NET_REFCNT_DEBUG |
533 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
534 | #endif | |
535 | ||
536 | in6_dev_put(ifp->idev); | |
537 | ||
538 | if (del_timer(&ifp->timer)) | |
539 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
540 | ||
541 | if (!ifp->dead) { | |
542 | printk("Freeing alive inet6 address %p\n", ifp); | |
543 | return; | |
544 | } | |
545 | dst_release(&ifp->rt->u.dst); | |
546 | ||
547 | kfree(ifp); | |
548 | } | |
549 | ||
e55ffac6 BH |
550 | static void |
551 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
552 | { | |
553 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 554 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
555 | |
556 | /* | |
557 | * Each device address list is sorted in order of scope - | |
558 | * global before linklocal. | |
559 | */ | |
560 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
561 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 562 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
563 | break; |
564 | } | |
565 | ||
566 | ifp->if_next = *ifap; | |
567 | *ifap = ifp; | |
568 | } | |
569 | ||
3eb84f49 YH |
570 | /* |
571 | * Hash function taken from net_alias.c | |
572 | */ | |
573 | static u8 ipv6_addr_hash(const struct in6_addr *addr) | |
574 | { | |
575 | __u32 word; | |
576 | ||
577 | /* | |
578 | * We perform the hash function over the last 64 bits of the address | |
579 | * This will include the IEEE address token on links that support it. | |
580 | */ | |
581 | ||
582 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); | |
583 | word ^= (word >> 16); | |
584 | word ^= (word >> 8); | |
585 | ||
586 | return ((word ^ (word >> 4)) & 0x0f); | |
587 | } | |
588 | ||
1da177e4 LT |
589 | /* On success it returns ifp with increased reference count */ |
590 | ||
591 | static struct inet6_ifaddr * | |
592 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 593 | int scope, u32 flags) |
1da177e4 LT |
594 | { |
595 | struct inet6_ifaddr *ifa = NULL; | |
596 | struct rt6_info *rt; | |
597 | int hash; | |
598 | int err = 0; | |
d68b8270 YH |
599 | int addr_type = ipv6_addr_type(addr); |
600 | ||
601 | if (addr_type == IPV6_ADDR_ANY || | |
602 | addr_type & IPV6_ADDR_MULTICAST || | |
603 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
604 | addr_type & IPV6_ADDR_LOOPBACK)) | |
605 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 606 | |
8814c4b5 | 607 | rcu_read_lock_bh(); |
1da177e4 LT |
608 | if (idev->dead) { |
609 | err = -ENODEV; /*XXX*/ | |
610 | goto out2; | |
611 | } | |
612 | ||
56d417b1 | 613 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
614 | err = -EACCES; |
615 | goto out2; | |
616 | } | |
617 | ||
1da177e4 LT |
618 | write_lock(&addrconf_hash_lock); |
619 | ||
620 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 621 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
622 | ADBG(("ipv6_add_addr: already assigned\n")); |
623 | err = -EEXIST; | |
624 | goto out; | |
625 | } | |
626 | ||
322f74a4 | 627 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
628 | |
629 | if (ifa == NULL) { | |
630 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
631 | err = -ENOBUFS; | |
632 | goto out; | |
633 | } | |
634 | ||
635 | rt = addrconf_dst_alloc(idev, addr, 0); | |
636 | if (IS_ERR(rt)) { | |
637 | err = PTR_ERR(rt); | |
638 | goto out; | |
639 | } | |
640 | ||
1da177e4 LT |
641 | ipv6_addr_copy(&ifa->addr, addr); |
642 | ||
643 | spin_lock_init(&ifa->lock); | |
644 | init_timer(&ifa->timer); | |
645 | ifa->timer.data = (unsigned long) ifa; | |
646 | ifa->scope = scope; | |
647 | ifa->prefix_len = pfxlen; | |
648 | ifa->flags = flags | IFA_F_TENTATIVE; | |
649 | ifa->cstamp = ifa->tstamp = jiffies; | |
650 | ||
57f5f544 KF |
651 | ifa->rt = rt; |
652 | ||
95c385b4 NH |
653 | /* |
654 | * part one of RFC 4429, section 3.3 | |
655 | * We should not configure an address as | |
656 | * optimistic if we do not yet know the link | |
657 | * layer address of our nexhop router | |
658 | */ | |
659 | ||
660 | if (rt->rt6i_nexthop == NULL) | |
661 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
662 | ||
1da177e4 LT |
663 | ifa->idev = idev; |
664 | in6_dev_hold(idev); | |
665 | /* For caller */ | |
666 | in6_ifa_hold(ifa); | |
667 | ||
668 | /* Add to big hash table */ | |
669 | hash = ipv6_addr_hash(addr); | |
670 | ||
671 | ifa->lst_next = inet6_addr_lst[hash]; | |
672 | inet6_addr_lst[hash] = ifa; | |
673 | in6_ifa_hold(ifa); | |
674 | write_unlock(&addrconf_hash_lock); | |
675 | ||
676 | write_lock(&idev->lock); | |
677 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 678 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
679 | |
680 | #ifdef CONFIG_IPV6_PRIVACY | |
681 | if (ifa->flags&IFA_F_TEMPORARY) { | |
682 | ifa->tmp_next = idev->tempaddr_list; | |
683 | idev->tempaddr_list = ifa; | |
684 | in6_ifa_hold(ifa); | |
685 | } | |
686 | #endif | |
687 | ||
1da177e4 LT |
688 | in6_ifa_hold(ifa); |
689 | write_unlock(&idev->lock); | |
690 | out2: | |
8814c4b5 | 691 | rcu_read_unlock_bh(); |
1da177e4 | 692 | |
fd92833a | 693 | if (likely(err == 0)) |
e041c683 | 694 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
695 | else { |
696 | kfree(ifa); | |
697 | ifa = ERR_PTR(err); | |
698 | } | |
699 | ||
700 | return ifa; | |
701 | out: | |
702 | write_unlock(&addrconf_hash_lock); | |
703 | goto out2; | |
704 | } | |
705 | ||
706 | /* This function wants to get referenced ifp and releases it before return */ | |
707 | ||
708 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
709 | { | |
710 | struct inet6_ifaddr *ifa, **ifap; | |
711 | struct inet6_dev *idev = ifp->idev; | |
712 | int hash; | |
713 | int deleted = 0, onlink = 0; | |
714 | unsigned long expires = jiffies; | |
715 | ||
716 | hash = ipv6_addr_hash(&ifp->addr); | |
717 | ||
718 | ifp->dead = 1; | |
719 | ||
720 | write_lock_bh(&addrconf_hash_lock); | |
721 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
722 | ifap = &ifa->lst_next) { | |
723 | if (ifa == ifp) { | |
724 | *ifap = ifa->lst_next; | |
725 | __in6_ifa_put(ifp); | |
726 | ifa->lst_next = NULL; | |
727 | break; | |
728 | } | |
729 | } | |
730 | write_unlock_bh(&addrconf_hash_lock); | |
731 | ||
732 | write_lock_bh(&idev->lock); | |
733 | #ifdef CONFIG_IPV6_PRIVACY | |
734 | if (ifp->flags&IFA_F_TEMPORARY) { | |
735 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
736 | ifap = &ifa->tmp_next) { | |
737 | if (ifa == ifp) { | |
738 | *ifap = ifa->tmp_next; | |
739 | if (ifp->ifpub) { | |
740 | in6_ifa_put(ifp->ifpub); | |
741 | ifp->ifpub = NULL; | |
742 | } | |
743 | __in6_ifa_put(ifp); | |
744 | ifa->tmp_next = NULL; | |
745 | break; | |
746 | } | |
747 | } | |
748 | } | |
749 | #endif | |
750 | ||
1d142804 | 751 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
752 | if (ifa == ifp) { |
753 | *ifap = ifa->if_next; | |
754 | __in6_ifa_put(ifp); | |
755 | ifa->if_next = NULL; | |
756 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
757 | break; | |
758 | deleted = 1; | |
1d142804 | 759 | continue; |
1da177e4 LT |
760 | } else if (ifp->flags & IFA_F_PERMANENT) { |
761 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
762 | ifp->prefix_len)) { | |
763 | if (ifa->flags & IFA_F_PERMANENT) { | |
764 | onlink = 1; | |
765 | if (deleted) | |
766 | break; | |
767 | } else { | |
768 | unsigned long lifetime; | |
769 | ||
770 | if (!onlink) | |
771 | onlink = -1; | |
772 | ||
773 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
774 | |
775 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
776 | /* | |
777 | * Note: Because this address is | |
778 | * not permanent, lifetime < | |
779 | * LONG_MAX / HZ here. | |
780 | */ | |
1da177e4 LT |
781 | if (time_before(expires, |
782 | ifa->tstamp + lifetime * HZ)) | |
783 | expires = ifa->tstamp + lifetime * HZ; | |
784 | spin_unlock(&ifa->lock); | |
785 | } | |
786 | } | |
787 | } | |
1d142804 | 788 | ifap = &ifa->if_next; |
1da177e4 LT |
789 | } |
790 | write_unlock_bh(&idev->lock); | |
791 | ||
b2238566 AV |
792 | addrconf_del_timer(ifp); |
793 | ||
1da177e4 LT |
794 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
795 | ||
e041c683 | 796 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 797 | |
1da177e4 LT |
798 | /* |
799 | * Purge or update corresponding prefix | |
800 | * | |
801 | * 1) we don't purge prefix here if address was not permanent. | |
802 | * prefix is managed by its own lifetime. | |
803 | * 2) if there're no addresses, delete prefix. | |
804 | * 3) if there're still other permanent address(es), | |
805 | * corresponding prefix is still permanent. | |
806 | * 4) otherwise, update prefix lifetime to the | |
807 | * longest valid lifetime among the corresponding | |
808 | * addresses on the device. | |
809 | * Note: subsequent RA will update lifetime. | |
810 | * | |
811 | * --yoshfuji | |
812 | */ | |
813 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
814 | struct in6_addr prefix; | |
815 | struct rt6_info *rt; | |
c346dca1 | 816 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 817 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 818 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 819 | |
2b5ead46 | 820 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 821 | if (onlink == 0) { |
e0a1ad73 | 822 | ip6_del_rt(rt); |
1da177e4 LT |
823 | rt = NULL; |
824 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
825 | rt->rt6i_expires = expires; | |
826 | rt->rt6i_flags |= RTF_EXPIRES; | |
827 | } | |
828 | } | |
829 | dst_release(&rt->u.dst); | |
830 | } | |
831 | ||
832 | in6_ifa_put(ifp); | |
833 | } | |
834 | ||
835 | #ifdef CONFIG_IPV6_PRIVACY | |
836 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
837 | { | |
838 | struct inet6_dev *idev = ifp->idev; | |
839 | struct in6_addr addr, *tmpaddr; | |
840 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 841 | unsigned long regen_advance; |
1da177e4 LT |
842 | int tmp_plen; |
843 | int ret = 0; | |
844 | int max_addresses; | |
95c385b4 | 845 | u32 addr_flags; |
1da177e4 LT |
846 | |
847 | write_lock(&idev->lock); | |
848 | if (ift) { | |
849 | spin_lock_bh(&ift->lock); | |
850 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
851 | spin_unlock_bh(&ift->lock); | |
852 | tmpaddr = &addr; | |
853 | } else { | |
854 | tmpaddr = NULL; | |
855 | } | |
856 | retry: | |
857 | in6_dev_hold(idev); | |
858 | if (idev->cnf.use_tempaddr <= 0) { | |
859 | write_unlock(&idev->lock); | |
860 | printk(KERN_INFO | |
861 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
862 | in6_dev_put(idev); | |
863 | ret = -1; | |
864 | goto out; | |
865 | } | |
866 | spin_lock_bh(&ifp->lock); | |
867 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
868 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
869 | spin_unlock_bh(&ifp->lock); | |
870 | write_unlock(&idev->lock); | |
871 | printk(KERN_WARNING | |
872 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
873 | in6_dev_put(idev); | |
874 | ret = -1; | |
875 | goto out; | |
876 | } | |
877 | in6_ifa_hold(ifp); | |
878 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
879 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
880 | spin_unlock_bh(&ifp->lock); | |
881 | write_unlock(&idev->lock); | |
882 | printk(KERN_WARNING | |
883 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
884 | in6_ifa_put(ifp); | |
885 | in6_dev_put(idev); | |
886 | ret = -1; | |
887 | goto out; | |
888 | } | |
889 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
890 | tmp_valid_lft = min_t(__u32, | |
891 | ifp->valid_lft, | |
892 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
893 | tmp_prefered_lft = min_t(__u32, |
894 | ifp->prefered_lft, | |
1da177e4 LT |
895 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
896 | tmp_plen = ifp->prefix_len; | |
897 | max_addresses = idev->cnf.max_addresses; | |
898 | tmp_cstamp = ifp->cstamp; | |
899 | tmp_tstamp = ifp->tstamp; | |
900 | spin_unlock_bh(&ifp->lock); | |
901 | ||
eac55bf9 BB |
902 | regen_advance = idev->cnf.regen_max_retry * |
903 | idev->cnf.dad_transmits * | |
904 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 905 | write_unlock(&idev->lock); |
95c385b4 | 906 | |
eac55bf9 BB |
907 | /* A temporary address is created only if this calculated Preferred |
908 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
909 | * an implementation must not create a temporary address with a zero | |
910 | * Preferred Lifetime. | |
911 | */ | |
912 | if (tmp_prefered_lft <= regen_advance) { | |
913 | in6_ifa_put(ifp); | |
914 | in6_dev_put(idev); | |
915 | ret = -1; | |
916 | goto out; | |
917 | } | |
918 | ||
95c385b4 NH |
919 | addr_flags = IFA_F_TEMPORARY; |
920 | /* set in addrconf_prefix_rcv() */ | |
921 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
922 | addr_flags |= IFA_F_OPTIMISTIC; | |
923 | ||
1da177e4 | 924 | ift = !max_addresses || |
1ab1457c | 925 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 926 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
927 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
928 | addr_flags) : NULL; | |
1da177e4 LT |
929 | if (!ift || IS_ERR(ift)) { |
930 | in6_ifa_put(ifp); | |
931 | in6_dev_put(idev); | |
932 | printk(KERN_INFO | |
933 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
934 | tmpaddr = &addr; | |
935 | write_lock(&idev->lock); | |
936 | goto retry; | |
937 | } | |
938 | ||
939 | spin_lock_bh(&ift->lock); | |
940 | ift->ifpub = ifp; | |
941 | ift->valid_lft = tmp_valid_lft; | |
942 | ift->prefered_lft = tmp_prefered_lft; | |
943 | ift->cstamp = tmp_cstamp; | |
944 | ift->tstamp = tmp_tstamp; | |
945 | spin_unlock_bh(&ift->lock); | |
946 | ||
947 | addrconf_dad_start(ift, 0); | |
948 | in6_ifa_put(ift); | |
949 | in6_dev_put(idev); | |
950 | out: | |
951 | return ret; | |
952 | } | |
953 | #endif | |
954 | ||
955 | /* | |
072047e4 | 956 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 957 | */ |
a9b05723 YH |
958 | enum { |
959 | IPV6_SADDR_RULE_INIT = 0, | |
960 | IPV6_SADDR_RULE_LOCAL, | |
961 | IPV6_SADDR_RULE_SCOPE, | |
962 | IPV6_SADDR_RULE_PREFERRED, | |
963 | #ifdef CONFIG_IPV6_MIP6 | |
964 | IPV6_SADDR_RULE_HOA, | |
965 | #endif | |
966 | IPV6_SADDR_RULE_OIF, | |
967 | IPV6_SADDR_RULE_LABEL, | |
968 | #ifdef CONFIG_IPV6_PRIVACY | |
969 | IPV6_SADDR_RULE_PRIVACY, | |
970 | #endif | |
971 | IPV6_SADDR_RULE_ORCHID, | |
972 | IPV6_SADDR_RULE_PREFIX, | |
973 | IPV6_SADDR_RULE_MAX | |
974 | }; | |
975 | ||
072047e4 | 976 | struct ipv6_saddr_score { |
a9b05723 YH |
977 | int rule; |
978 | int addr_type; | |
979 | struct inet6_ifaddr *ifa; | |
980 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
981 | int scopedist; | |
982 | int matchlen; | |
072047e4 YH |
983 | }; |
984 | ||
a9b05723 | 985 | struct ipv6_saddr_dst { |
9acd9f3a | 986 | const struct in6_addr *addr; |
a9b05723 YH |
987 | int ifindex; |
988 | int scope; | |
989 | int label; | |
7cbca67c | 990 | unsigned int prefs; |
a9b05723 | 991 | }; |
072047e4 | 992 | |
b6f99a21 | 993 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 994 | { |
45bb0060 | 995 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
996 | return 1; |
997 | return 0; | |
1da177e4 LT |
998 | } |
999 | ||
3de23255 BT |
1000 | static int ipv6_get_saddr_eval(struct net *net, |
1001 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1002 | struct ipv6_saddr_dst *dst, |
1003 | int i) | |
1004 | { | |
1005 | int ret; | |
1006 | ||
1007 | if (i <= score->rule) { | |
1008 | switch (i) { | |
1009 | case IPV6_SADDR_RULE_SCOPE: | |
1010 | ret = score->scopedist; | |
1011 | break; | |
1012 | case IPV6_SADDR_RULE_PREFIX: | |
1013 | ret = score->matchlen; | |
1014 | break; | |
1015 | default: | |
1016 | ret = !!test_bit(i, score->scorebits); | |
1017 | } | |
1018 | goto out; | |
1019 | } | |
1020 | ||
1021 | switch (i) { | |
1022 | case IPV6_SADDR_RULE_INIT: | |
1023 | /* Rule 0: remember if hiscore is not ready yet */ | |
1024 | ret = !!score->ifa; | |
1025 | break; | |
1026 | case IPV6_SADDR_RULE_LOCAL: | |
1027 | /* Rule 1: Prefer same address */ | |
1028 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1029 | break; | |
1030 | case IPV6_SADDR_RULE_SCOPE: | |
1031 | /* Rule 2: Prefer appropriate scope | |
1032 | * | |
1033 | * ret | |
1034 | * ^ | |
1035 | * -1 | d 15 | |
1036 | * ---+--+-+---> scope | |
1037 | * | | |
1038 | * | d is scope of the destination. | |
1039 | * B-d | \ | |
1040 | * | \ <- smaller scope is better if | |
1041 | * B-15 | \ if scope is enough for destinaion. | |
1042 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1043 | * d-C-1 | / | |
1044 | * |/ <- greater is better | |
1045 | * -C / if scope is not enough for destination. | |
1046 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1047 | * | |
1048 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1049 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1050 | * Assume B = 0 and we get C > 29. | |
1051 | */ | |
1052 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1053 | if (ret >= dst->scope) | |
1054 | ret = -ret; | |
1055 | else | |
1056 | ret -= 128; /* 30 is enough */ | |
1057 | score->scopedist = ret; | |
1058 | break; | |
1059 | case IPV6_SADDR_RULE_PREFERRED: | |
1060 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1061 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1062 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1063 | break; | |
1064 | #ifdef CONFIG_IPV6_MIP6 | |
1065 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1066 | { |
a9b05723 | 1067 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1068 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1069 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1070 | break; |
7cbca67c | 1071 | } |
a9b05723 YH |
1072 | #endif |
1073 | case IPV6_SADDR_RULE_OIF: | |
1074 | /* Rule 5: Prefer outgoing interface */ | |
1075 | ret = (!dst->ifindex || | |
1076 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1077 | break; | |
1078 | case IPV6_SADDR_RULE_LABEL: | |
1079 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1080 | ret = ipv6_addr_label(net, |
1081 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1082 | score->ifa->idev->dev->ifindex) == dst->label; |
1083 | break; | |
1084 | #ifdef CONFIG_IPV6_PRIVACY | |
1085 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1086 | { |
a9b05723 YH |
1087 | /* Rule 7: Prefer public address |
1088 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1089 | */ | |
7cbca67c YH |
1090 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1091 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1092 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1093 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1094 | break; |
7cbca67c | 1095 | } |
a9b05723 YH |
1096 | #endif |
1097 | case IPV6_SADDR_RULE_ORCHID: | |
1098 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1099 | * non-ORCHID vs non-ORCHID | |
1100 | */ | |
1101 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1102 | ipv6_addr_orchid(dst->addr)); | |
1103 | break; | |
1104 | case IPV6_SADDR_RULE_PREFIX: | |
1105 | /* Rule 8: Use longest matching prefix */ | |
1106 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1107 | dst->addr); | |
1108 | break; | |
1109 | default: | |
1110 | ret = 0; | |
1111 | } | |
1112 | ||
1113 | if (ret) | |
1114 | __set_bit(i, score->scorebits); | |
1115 | score->rule = i; | |
1116 | out: | |
1117 | return ret; | |
1118 | } | |
1119 | ||
191cd582 | 1120 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1121 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1122 | struct in6_addr *saddr) |
1da177e4 | 1123 | { |
a9b05723 YH |
1124 | struct ipv6_saddr_score scores[2], |
1125 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1126 | struct ipv6_saddr_dst dst; |
072047e4 | 1127 | struct net_device *dev; |
a9b05723 | 1128 | int dst_type; |
1da177e4 | 1129 | |
a9b05723 YH |
1130 | dst_type = __ipv6_addr_type(daddr); |
1131 | dst.addr = daddr; | |
1132 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1133 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1134 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1135 | dst.prefs = prefs; |
a9b05723 YH |
1136 | |
1137 | hiscore->rule = -1; | |
1138 | hiscore->ifa = NULL; | |
1da177e4 | 1139 | |
8814c4b5 | 1140 | rcu_read_lock(); |
1da177e4 | 1141 | |
c6d14c84 | 1142 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1143 | struct inet6_dev *idev; |
072047e4 | 1144 | |
a9b05723 | 1145 | /* Candidate Source Address (section 4) |
072047e4 YH |
1146 | * - multicast and link-local destination address, |
1147 | * the set of candidate source address MUST only | |
1148 | * include addresses assigned to interfaces | |
1149 | * belonging to the same link as the outgoing | |
1150 | * interface. | |
1151 | * (- For site-local destination addresses, the | |
1152 | * set of candidate source addresses MUST only | |
1153 | * include addresses assigned to interfaces | |
1154 | * belonging to the same site as the outgoing | |
1155 | * interface.) | |
1156 | */ | |
a9b05723 YH |
1157 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1158 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1159 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1160 | continue; |
1da177e4 | 1161 | |
1da177e4 | 1162 | idev = __in6_dev_get(dev); |
072047e4 YH |
1163 | if (!idev) |
1164 | continue; | |
1165 | ||
1166 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1167 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1168 | int i; | |
072047e4 | 1169 | |
a9b05723 | 1170 | /* |
6b3ae80a YH |
1171 | * - Tentative Address (RFC2462 section 5.4) |
1172 | * - A tentative address is not considered | |
1173 | * "assigned to an interface" in the traditional | |
95c385b4 | 1174 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1175 | * - Candidate Source Address (section 4) |
072047e4 YH |
1176 | * - In any case, anycast addresses, multicast |
1177 | * addresses, and the unspecified address MUST | |
1178 | * NOT be included in a candidate set. | |
1179 | */ | |
a9b05723 YH |
1180 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1181 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1182 | continue; |
a9b05723 YH |
1183 | |
1184 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1185 | ||
1186 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1187 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1188 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1189 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1190 | "assigned as unicast address on %s", |
1191 | dev->name); | |
1192 | continue; | |
1193 | } | |
1194 | ||
a9b05723 YH |
1195 | score->rule = -1; |
1196 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1197 | ||
1198 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1199 | int minihiscore, miniscore; | |
1200 | ||
3de23255 BT |
1201 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1202 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1203 | |
1204 | if (minihiscore > miniscore) { | |
1205 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1206 | score->scopedist > 0) { | |
1207 | /* | |
1208 | * special case: | |
1209 | * each remaining entry | |
1210 | * has too small (not enough) | |
1211 | * scope, because ifa entries | |
1212 | * are sorted by their scope | |
1213 | * values. | |
1214 | */ | |
1215 | goto try_nextdev; | |
1216 | } | |
1217 | break; | |
1218 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1219 | if (hiscore->ifa) |
1220 | in6_ifa_put(hiscore->ifa); | |
1221 | ||
1222 | in6_ifa_hold(score->ifa); | |
1223 | ||
a0bffffc | 1224 | swap(hiscore, score); |
a9b05723 YH |
1225 | |
1226 | /* restore our iterator */ | |
1227 | score->ifa = hiscore->ifa; | |
1228 | ||
1229 | break; | |
1da177e4 | 1230 | } |
072047e4 | 1231 | } |
1da177e4 | 1232 | } |
a9b05723 | 1233 | try_nextdev: |
072047e4 | 1234 | read_unlock_bh(&idev->lock); |
1da177e4 | 1235 | } |
8814c4b5 | 1236 | rcu_read_unlock(); |
1da177e4 | 1237 | |
a9b05723 | 1238 | if (!hiscore->ifa) |
072047e4 | 1239 | return -EADDRNOTAVAIL; |
1ab1457c | 1240 | |
a9b05723 YH |
1241 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1242 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1243 | return 0; |
1da177e4 LT |
1244 | } |
1245 | ||
5e5f3f0f | 1246 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1247 | |
95c385b4 NH |
1248 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1249 | unsigned char banned_flags) | |
1da177e4 LT |
1250 | { |
1251 | struct inet6_dev *idev; | |
1252 | int err = -EADDRNOTAVAIL; | |
1253 | ||
8814c4b5 | 1254 | rcu_read_lock(); |
1da177e4 LT |
1255 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1256 | struct inet6_ifaddr *ifp; | |
1257 | ||
1258 | read_lock_bh(&idev->lock); | |
1259 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1260 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1261 | ipv6_addr_copy(addr, &ifp->addr); |
1262 | err = 0; | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | read_unlock_bh(&idev->lock); | |
1267 | } | |
8814c4b5 | 1268 | rcu_read_unlock(); |
1da177e4 LT |
1269 | return err; |
1270 | } | |
1271 | ||
1272 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1273 | { | |
1274 | int cnt = 0; | |
1275 | struct inet6_ifaddr *ifp; | |
1276 | ||
1277 | read_lock_bh(&idev->lock); | |
1278 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1279 | cnt++; | |
1280 | read_unlock_bh(&idev->lock); | |
1281 | return cnt; | |
1282 | } | |
1283 | ||
bfeade08 DL |
1284 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1285 | struct net_device *dev, int strict) | |
1da177e4 LT |
1286 | { |
1287 | struct inet6_ifaddr * ifp; | |
1288 | u8 hash = ipv6_addr_hash(addr); | |
1289 | ||
1290 | read_lock_bh(&addrconf_hash_lock); | |
1291 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1292 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1293 | continue; |
1da177e4 LT |
1294 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1295 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1296 | if (dev == NULL || ifp->idev->dev == dev || | |
1297 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1298 | break; | |
1299 | } | |
1300 | } | |
1301 | read_unlock_bh(&addrconf_hash_lock); | |
1302 | return ifp != NULL; | |
1303 | } | |
7159039a YH |
1304 | EXPORT_SYMBOL(ipv6_chk_addr); |
1305 | ||
1da177e4 | 1306 | static |
06bfe655 DL |
1307 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1308 | struct net_device *dev) | |
1da177e4 LT |
1309 | { |
1310 | struct inet6_ifaddr * ifp; | |
1311 | u8 hash = ipv6_addr_hash(addr); | |
1312 | ||
1313 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1314 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1315 | continue; |
1da177e4 LT |
1316 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1317 | if (dev == NULL || ifp->idev->dev == dev) | |
1318 | break; | |
1319 | } | |
1320 | } | |
1321 | return ifp != NULL; | |
1322 | } | |
1323 | ||
52eeeb84 YH |
1324 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1325 | { | |
1326 | struct inet6_dev *idev; | |
1327 | struct inet6_ifaddr *ifa; | |
1328 | int onlink; | |
1329 | ||
1330 | onlink = 0; | |
1331 | rcu_read_lock(); | |
1332 | idev = __in6_dev_get(dev); | |
1333 | if (idev) { | |
1334 | read_lock_bh(&idev->lock); | |
1335 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
1336 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
1337 | ifa->prefix_len); | |
1338 | if (onlink) | |
1339 | break; | |
1340 | } | |
1341 | read_unlock_bh(&idev->lock); | |
1342 | } | |
1343 | rcu_read_unlock(); | |
1344 | return onlink; | |
1345 | } | |
1346 | ||
1347 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1348 | ||
9acd9f3a | 1349 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1350 | struct net_device *dev, int strict) |
1da177e4 LT |
1351 | { |
1352 | struct inet6_ifaddr * ifp; | |
1353 | u8 hash = ipv6_addr_hash(addr); | |
1354 | ||
1355 | read_lock_bh(&addrconf_hash_lock); | |
1356 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1357 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1358 | continue; |
1da177e4 LT |
1359 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1360 | if (dev == NULL || ifp->idev->dev == dev || | |
1361 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1362 | in6_ifa_hold(ifp); | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | read_unlock_bh(&addrconf_hash_lock); | |
1368 | ||
1369 | return ifp; | |
1370 | } | |
1371 | ||
1da177e4 LT |
1372 | /* Gets referenced address, destroys ifaddr */ |
1373 | ||
cc411d0b | 1374 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1375 | { |
1da177e4 LT |
1376 | if (ifp->flags&IFA_F_PERMANENT) { |
1377 | spin_lock_bh(&ifp->lock); | |
1378 | addrconf_del_timer(ifp); | |
1379 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1380 | if (dad_failed) |
1381 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1382 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1383 | if (dad_failed) |
1384 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1385 | in6_ifa_put(ifp); |
1386 | #ifdef CONFIG_IPV6_PRIVACY | |
1387 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1388 | struct inet6_ifaddr *ifpub; | |
1389 | spin_lock_bh(&ifp->lock); | |
1390 | ifpub = ifp->ifpub; | |
1391 | if (ifpub) { | |
1392 | in6_ifa_hold(ifpub); | |
1393 | spin_unlock_bh(&ifp->lock); | |
1394 | ipv6_create_tempaddr(ifpub, ifp); | |
1395 | in6_ifa_put(ifpub); | |
1396 | } else { | |
1397 | spin_unlock_bh(&ifp->lock); | |
1398 | } | |
1399 | ipv6_del_addr(ifp); | |
1400 | #endif | |
1401 | } else | |
1402 | ipv6_del_addr(ifp); | |
1403 | } | |
1404 | ||
3c21edbd YH |
1405 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1406 | { | |
1b34be74 | 1407 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 BH |
1408 | |
1409 | if (net_ratelimit()) | |
0522fea6 JR |
1410 | printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |
1411 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1412 | |
1b34be74 YH |
1413 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1414 | struct in6_addr addr; | |
1415 | ||
1416 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1417 | addr.s6_addr32[1] = 0; | |
1418 | ||
1419 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1420 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1421 | /* DAD failed for link-local based on MAC address */ | |
1422 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 BH |
1423 | |
1424 | printk(KERN_INFO "%s: IPv6 being disabled!\n", | |
1425 | ifp->idev->dev->name); | |
1b34be74 YH |
1426 | } |
1427 | } | |
1428 | ||
cc411d0b | 1429 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1430 | } |
1da177e4 LT |
1431 | |
1432 | /* Join to solicited addr multicast group. */ | |
1433 | ||
1434 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1435 | { | |
1436 | struct in6_addr maddr; | |
1437 | ||
1438 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1439 | return; | |
1440 | ||
1441 | addrconf_addr_solict_mult(addr, &maddr); | |
1442 | ipv6_dev_mc_inc(dev, &maddr); | |
1443 | } | |
1444 | ||
1445 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1446 | { | |
1447 | struct in6_addr maddr; | |
1448 | ||
1449 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1450 | return; | |
1451 | ||
1452 | addrconf_addr_solict_mult(addr, &maddr); | |
1453 | __ipv6_dev_mc_dec(idev, &maddr); | |
1454 | } | |
1455 | ||
20380731 | 1456 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1457 | { |
1458 | struct in6_addr addr; | |
1459 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1460 | if (ipv6_addr_any(&addr)) | |
1461 | return; | |
1462 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1463 | } | |
1464 | ||
20380731 | 1465 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1466 | { |
1467 | struct in6_addr addr; | |
1468 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1469 | if (ipv6_addr_any(&addr)) | |
1470 | return; | |
1471 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1472 | } | |
1473 | ||
073a8e0e YH |
1474 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1475 | { | |
1476 | if (dev->addr_len != ETH_ALEN) | |
1477 | return -1; | |
1478 | memcpy(eui, dev->dev_addr, 3); | |
1479 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1480 | ||
1481 | /* | |
1482 | * The zSeries OSA network cards can be shared among various | |
1483 | * OS instances, but the OSA cards have only one MAC address. | |
1484 | * This leads to duplicate address conflicts in conjunction | |
1485 | * with IPv6 if more than one instance uses the same card. | |
1486 | * | |
1487 | * The driver for these cards can deliver a unique 16-bit | |
1488 | * identifier for each instance sharing the same card. It is | |
1489 | * placed instead of 0xFFFE in the interface identifier. The | |
1490 | * "u" bit of the interface identifier is not inverted in this | |
1491 | * case. Hence the resulting interface identifier has local | |
1492 | * scope according to RFC2373. | |
1493 | */ | |
1494 | if (dev->dev_id) { | |
1495 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1496 | eui[4] = dev->dev_id & 0xFF; | |
1497 | } else { | |
1498 | eui[3] = 0xFF; | |
1499 | eui[4] = 0xFE; | |
1500 | eui[0] ^= 2; | |
1501 | } | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1506 | { | |
1507 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1508 | if (dev->addr_len != ARCNET_ALEN) | |
1509 | return -1; | |
1510 | memset(eui, 0, 7); | |
1511 | eui[7] = *(u8*)dev->dev_addr; | |
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1516 | { | |
1517 | if (dev->addr_len != INFINIBAND_ALEN) | |
1518 | return -1; | |
1519 | memcpy(eui, dev->dev_addr + 12, 8); | |
1520 | eui[0] |= 2; | |
1521 | return 0; | |
1522 | } | |
1523 | ||
dfd982ba YH |
1524 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1525 | { | |
9af28511 SH |
1526 | if (addr == 0) |
1527 | return -1; | |
dfd982ba YH |
1528 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1529 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1530 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1531 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1532 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1533 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1534 | eui[1] = 0; | |
1535 | eui[2] = 0x5E; | |
1536 | eui[3] = 0xFE; | |
1537 | memcpy(eui + 4, &addr, 4); | |
1538 | return 0; | |
1539 | } | |
1540 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1541 | ||
1542 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1543 | { | |
1544 | if (dev->priv_flags & IFF_ISATAP) | |
1545 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1546 | return -1; | |
1547 | } | |
1548 | ||
1da177e4 LT |
1549 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1550 | { | |
1551 | switch (dev->type) { | |
1552 | case ARPHRD_ETHER: | |
1553 | case ARPHRD_FDDI: | |
1554 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1555 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1556 | case ARPHRD_ARCNET: |
073a8e0e | 1557 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1558 | case ARPHRD_INFINIBAND: |
073a8e0e | 1559 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1560 | case ARPHRD_SIT: |
dfd982ba | 1561 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1562 | } |
1563 | return -1; | |
1564 | } | |
1565 | ||
1566 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1567 | { | |
1568 | int err = -1; | |
1569 | struct inet6_ifaddr *ifp; | |
1570 | ||
1571 | read_lock_bh(&idev->lock); | |
1572 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1573 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1574 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1575 | err = 0; | |
1576 | break; | |
1577 | } | |
1578 | } | |
1579 | read_unlock_bh(&idev->lock); | |
1580 | return err; | |
1581 | } | |
1582 | ||
1583 | #ifdef CONFIG_IPV6_PRIVACY | |
1584 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1585 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1586 | { | |
1da177e4 | 1587 | regen: |
955189ef | 1588 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1589 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1590 | |
1591 | /* | |
1592 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1593 | * check if generated address is not inappropriate | |
1594 | * | |
1595 | * - Reserved subnet anycast (RFC 2526) | |
1596 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1597 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1598 | * 00-00-5E-FE-xx-xx-xx-xx |
1599 | * - value 0 | |
1600 | * - XXX: already assigned to an address on the device | |
1601 | */ | |
1ab1457c | 1602 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1603 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1604 | (idev->rndid[7]&0x80)) | |
1605 | goto regen; | |
1606 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1607 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1608 | goto regen; | |
1609 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1610 | goto regen; | |
1611 | } | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static void ipv6_regen_rndid(unsigned long data) | |
1617 | { | |
1618 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1619 | unsigned long expires; | |
1620 | ||
8814c4b5 | 1621 | rcu_read_lock_bh(); |
1da177e4 LT |
1622 | write_lock_bh(&idev->lock); |
1623 | ||
1624 | if (idev->dead) | |
1625 | goto out; | |
1626 | ||
1627 | if (__ipv6_regen_rndid(idev) < 0) | |
1628 | goto out; | |
1ab1457c | 1629 | |
1da177e4 | 1630 | expires = jiffies + |
1ab1457c | 1631 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1632 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1633 | if (time_before(expires, jiffies)) { | |
1634 | printk(KERN_WARNING | |
1635 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1636 | idev->dev->name); | |
1637 | goto out; | |
1638 | } | |
1639 | ||
1640 | if (!mod_timer(&idev->regen_timer, expires)) | |
1641 | in6_dev_hold(idev); | |
1642 | ||
1643 | out: | |
1644 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1645 | rcu_read_unlock_bh(); |
1da177e4 LT |
1646 | in6_dev_put(idev); |
1647 | } | |
1648 | ||
1649 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1650 | int ret = 0; | |
1651 | ||
1652 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1653 | ret = __ipv6_regen_rndid(idev); | |
1654 | return ret; | |
1655 | } | |
1656 | #endif | |
1657 | ||
1658 | /* | |
1659 | * Add prefix route. | |
1660 | */ | |
1661 | ||
1662 | static void | |
1663 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1664 | unsigned long expires, u32 flags) |
1da177e4 | 1665 | { |
86872cb5 TG |
1666 | struct fib6_config cfg = { |
1667 | .fc_table = RT6_TABLE_PREFIX, | |
1668 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1669 | .fc_ifindex = dev->ifindex, | |
1670 | .fc_expires = expires, | |
1671 | .fc_dst_len = plen, | |
1672 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1673 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1674 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1675 | }; |
1da177e4 | 1676 | |
86872cb5 | 1677 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1678 | |
1679 | /* Prevent useless cloning on PtP SIT. | |
1680 | This thing is done here expecting that the whole | |
1681 | class of non-broadcast devices need not cloning. | |
1682 | */ | |
0be669bb | 1683 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1684 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1685 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1686 | #endif |
1da177e4 | 1687 | |
86872cb5 | 1688 | ip6_route_add(&cfg); |
1da177e4 LT |
1689 | } |
1690 | ||
1691 | /* Create "default" multicast route to the interface */ | |
1692 | ||
1693 | static void addrconf_add_mroute(struct net_device *dev) | |
1694 | { | |
86872cb5 TG |
1695 | struct fib6_config cfg = { |
1696 | .fc_table = RT6_TABLE_LOCAL, | |
1697 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1698 | .fc_ifindex = dev->ifindex, | |
1699 | .fc_dst_len = 8, | |
1700 | .fc_flags = RTF_UP, | |
c346dca1 | 1701 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1702 | }; |
1703 | ||
1704 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1705 | ||
1706 | ip6_route_add(&cfg); | |
1da177e4 LT |
1707 | } |
1708 | ||
0be669bb | 1709 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1710 | static void sit_route_add(struct net_device *dev) |
1711 | { | |
86872cb5 TG |
1712 | struct fib6_config cfg = { |
1713 | .fc_table = RT6_TABLE_MAIN, | |
1714 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1715 | .fc_ifindex = dev->ifindex, | |
1716 | .fc_dst_len = 96, | |
1717 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1718 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1719 | }; |
1da177e4 LT |
1720 | |
1721 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1722 | ip6_route_add(&cfg); |
1da177e4 | 1723 | } |
0be669bb | 1724 | #endif |
1da177e4 LT |
1725 | |
1726 | static void addrconf_add_lroute(struct net_device *dev) | |
1727 | { | |
1728 | struct in6_addr addr; | |
1729 | ||
1730 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1731 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1732 | } | |
1733 | ||
1734 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1735 | { | |
1736 | struct inet6_dev *idev; | |
1737 | ||
1738 | ASSERT_RTNL(); | |
1739 | ||
1740 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1741 | return NULL; | |
1742 | ||
1743 | /* Add default multicast route */ | |
1744 | addrconf_add_mroute(dev); | |
1745 | ||
1746 | /* Add link local route */ | |
1747 | addrconf_add_lroute(dev); | |
1748 | return idev; | |
1749 | } | |
1750 | ||
1751 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1752 | { | |
1753 | struct prefix_info *pinfo; | |
1754 | __u32 valid_lft; | |
1755 | __u32 prefered_lft; | |
1756 | int addr_type; | |
1da177e4 | 1757 | struct inet6_dev *in6_dev; |
56d417b1 | 1758 | struct net *net = dev_net(dev); |
1da177e4 LT |
1759 | |
1760 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1761 | |
1da177e4 LT |
1762 | if (len < sizeof(struct prefix_info)) { |
1763 | ADBG(("addrconf: prefix option too short\n")); | |
1764 | return; | |
1765 | } | |
1ab1457c | 1766 | |
1da177e4 LT |
1767 | /* |
1768 | * Validation checks ([ADDRCONF], page 19) | |
1769 | */ | |
1770 | ||
1771 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1772 | ||
1773 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1774 | return; | |
1775 | ||
1776 | valid_lft = ntohl(pinfo->valid); | |
1777 | prefered_lft = ntohl(pinfo->prefered); | |
1778 | ||
1779 | if (prefered_lft > valid_lft) { | |
1780 | if (net_ratelimit()) | |
1781 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1782 | return; | |
1783 | } | |
1784 | ||
1785 | in6_dev = in6_dev_get(dev); | |
1786 | ||
1787 | if (in6_dev == NULL) { | |
1788 | if (net_ratelimit()) | |
1789 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * Two things going on here: | |
1795 | * 1) Add routes for on-link prefixes | |
1796 | * 2) Configure prefixes with the auto flag set | |
1797 | */ | |
1798 | ||
4bed72e4 YH |
1799 | if (pinfo->onlink) { |
1800 | struct rt6_info *rt; | |
1801 | unsigned long rt_expires; | |
1802 | ||
6f704992 YH |
1803 | /* Avoid arithmetic overflow. Really, we could |
1804 | * save rt_expires in seconds, likely valid_lft, | |
1805 | * but it would require division in fib gc, that it | |
1806 | * not good. | |
1807 | */ | |
4bed72e4 YH |
1808 | if (HZ > USER_HZ) |
1809 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1810 | else | |
1811 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1812 | |
4bed72e4 YH |
1813 | if (addrconf_finite_timeout(rt_expires)) |
1814 | rt_expires *= HZ; | |
1da177e4 | 1815 | |
56d417b1 | 1816 | rt = rt6_lookup(net, &pinfo->prefix, NULL, |
6fda7350 | 1817 | dev->ifindex, 1); |
1da177e4 | 1818 | |
2b5ead46 | 1819 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1820 | /* Autoconf prefix route */ |
1821 | if (valid_lft == 0) { | |
1822 | ip6_del_rt(rt); | |
1823 | rt = NULL; | |
4bed72e4 | 1824 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1825 | /* not infinity */ |
1826 | rt->rt6i_expires = jiffies + rt_expires; | |
1827 | rt->rt6i_flags |= RTF_EXPIRES; | |
1828 | } else { | |
1829 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1830 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1831 | } |
1832 | } else if (valid_lft) { | |
6f704992 | 1833 | clock_t expires = 0; |
4bed72e4 YH |
1834 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1835 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1836 | /* not infinity */ |
1837 | flags |= RTF_EXPIRES; | |
1838 | expires = jiffies_to_clock_t(rt_expires); | |
1839 | } | |
1da177e4 | 1840 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1841 | dev, expires, flags); |
1da177e4 LT |
1842 | } |
1843 | if (rt) | |
1844 | dst_release(&rt->u.dst); | |
1845 | } | |
1846 | ||
1847 | /* Try to figure out our local address for this prefix */ | |
1848 | ||
1849 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1850 | struct inet6_ifaddr * ifp; | |
1851 | struct in6_addr addr; | |
1852 | int create = 0, update_lft = 0; | |
1853 | ||
1854 | if (pinfo->prefix_len == 64) { | |
1855 | memcpy(&addr, &pinfo->prefix, 8); | |
1856 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1857 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1858 | in6_dev_put(in6_dev); | |
1859 | return; | |
1860 | } | |
1861 | goto ok; | |
1862 | } | |
1863 | if (net_ratelimit()) | |
1864 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1865 | pinfo->prefix_len); | |
1866 | in6_dev_put(in6_dev); | |
1867 | return; | |
1868 | ||
1869 | ok: | |
1870 | ||
53b7997f | 1871 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1872 | |
1873 | if (ifp == NULL && valid_lft) { | |
1874 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1875 | u32 addr_flags = 0; |
1876 | ||
1877 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1878 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1879 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1880 | addr_flags = IFA_F_OPTIMISTIC; |
1881 | #endif | |
1da177e4 LT |
1882 | |
1883 | /* Do not allow to create too much of autoconfigured | |
1884 | * addresses; this would be too easy way to crash kernel. | |
1885 | */ | |
1886 | if (!max_addresses || | |
1887 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1888 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1889 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1890 | addr_flags); | |
1da177e4 LT |
1891 | |
1892 | if (!ifp || IS_ERR(ifp)) { | |
1893 | in6_dev_put(in6_dev); | |
1894 | return; | |
1895 | } | |
1896 | ||
1897 | update_lft = create = 1; | |
1898 | ifp->cstamp = jiffies; | |
1899 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1900 | } | |
1901 | ||
1902 | if (ifp) { | |
1903 | int flags; | |
1904 | unsigned long now; | |
1905 | #ifdef CONFIG_IPV6_PRIVACY | |
1906 | struct inet6_ifaddr *ift; | |
1907 | #endif | |
1908 | u32 stored_lft; | |
1909 | ||
1910 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1911 | spin_lock(&ifp->lock); | |
1912 | now = jiffies; | |
1913 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1914 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1915 | else | |
1916 | stored_lft = 0; | |
1917 | if (!update_lft && stored_lft) { | |
1918 | if (valid_lft > MIN_VALID_LIFETIME || | |
1919 | valid_lft > stored_lft) | |
1920 | update_lft = 1; | |
1921 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1922 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1923 | /* |
1924 | * RFC 4862 Section 5.5.3e: | |
1925 | * "Note that the preferred lifetime of | |
1926 | * the corresponding address is always | |
1927 | * reset to the Preferred Lifetime in | |
1928 | * the received Prefix Information | |
1929 | * option, regardless of whether the | |
1930 | * valid lifetime is also reset or | |
1931 | * ignored." | |
1932 | * | |
1933 | * So if the preferred lifetime in | |
1934 | * this advertisement is different | |
1935 | * than what we have stored, but the | |
1936 | * valid lifetime is invalid, just | |
1937 | * reset prefered_lft. | |
1938 | * | |
1939 | * We must set the valid lifetime | |
1940 | * to the stored lifetime since we'll | |
1941 | * be updating the timestamp below, | |
1942 | * else we'll set it back to the | |
1943 | * minumum. | |
1944 | */ | |
1945 | if (prefered_lft != ifp->prefered_lft) { | |
1946 | valid_lft = stored_lft; | |
1947 | update_lft = 1; | |
1948 | } | |
1da177e4 LT |
1949 | } else { |
1950 | valid_lft = MIN_VALID_LIFETIME; | |
1951 | if (valid_lft < prefered_lft) | |
1952 | prefered_lft = valid_lft; | |
1953 | update_lft = 1; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | if (update_lft) { | |
1958 | ifp->valid_lft = valid_lft; | |
1959 | ifp->prefered_lft = prefered_lft; | |
1960 | ifp->tstamp = now; | |
1961 | flags = ifp->flags; | |
1962 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1963 | spin_unlock(&ifp->lock); | |
1964 | ||
1965 | if (!(flags&IFA_F_TENTATIVE)) | |
1966 | ipv6_ifa_notify(0, ifp); | |
1967 | } else | |
1968 | spin_unlock(&ifp->lock); | |
1969 | ||
1970 | #ifdef CONFIG_IPV6_PRIVACY | |
1971 | read_lock_bh(&in6_dev->lock); | |
1972 | /* update all temporary addresses in the list */ | |
1973 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1974 | /* | |
1975 | * When adjusting the lifetimes of an existing | |
1976 | * temporary address, only lower the lifetimes. | |
1977 | * Implementations must not increase the | |
1978 | * lifetimes of an existing temporary address | |
1979 | * when processing a Prefix Information Option. | |
1980 | */ | |
c6fbfac2 BB |
1981 | if (ifp != ift->ifpub) |
1982 | continue; | |
1983 | ||
1da177e4 LT |
1984 | spin_lock(&ift->lock); |
1985 | flags = ift->flags; | |
1986 | if (ift->valid_lft > valid_lft && | |
1987 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1988 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1989 | if (ift->prefered_lft > prefered_lft && | |
1990 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1991 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1992 | spin_unlock(&ift->lock); | |
1993 | if (!(flags&IFA_F_TENTATIVE)) | |
1994 | ipv6_ifa_notify(0, ift); | |
1995 | } | |
1996 | ||
1997 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1998 | /* | |
1999 | * When a new public address is created as described in [ADDRCONF], | |
2000 | * also create a new temporary address. | |
2001 | */ | |
1ab1457c | 2002 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2003 | ipv6_create_tempaddr(ifp, NULL); |
2004 | } else { | |
2005 | read_unlock_bh(&in6_dev->lock); | |
2006 | } | |
2007 | #endif | |
2008 | in6_ifa_put(ifp); | |
2009 | addrconf_verify(0); | |
2010 | } | |
2011 | } | |
2012 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2013 | in6_dev_put(in6_dev); | |
2014 | } | |
2015 | ||
2016 | /* | |
2017 | * Set destination address. | |
2018 | * Special case for SIT interfaces where we create a new "virtual" | |
2019 | * device. | |
2020 | */ | |
af284937 | 2021 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2022 | { |
2023 | struct in6_ifreq ireq; | |
2024 | struct net_device *dev; | |
2025 | int err = -EINVAL; | |
2026 | ||
2027 | rtnl_lock(); | |
2028 | ||
2029 | err = -EFAULT; | |
2030 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2031 | goto err_exit; | |
2032 | ||
af284937 | 2033 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2034 | |
2035 | err = -ENODEV; | |
2036 | if (dev == NULL) | |
2037 | goto err_exit; | |
2038 | ||
0be669bb | 2039 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2040 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2041 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2042 | struct ifreq ifr; |
1da177e4 LT |
2043 | struct ip_tunnel_parm p; |
2044 | ||
2045 | err = -EADDRNOTAVAIL; | |
2046 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2047 | goto err_exit; | |
2048 | ||
2049 | memset(&p, 0, sizeof(p)); | |
2050 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2051 | p.iph.saddr = 0; | |
2052 | p.iph.version = 4; | |
2053 | p.iph.ihl = 5; | |
2054 | p.iph.protocol = IPPROTO_IPV6; | |
2055 | p.iph.ttl = 64; | |
d20b3109 | 2056 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2057 | |
5bc3eb7e SH |
2058 | if (ops->ndo_do_ioctl) { |
2059 | mm_segment_t oldfs = get_fs(); | |
2060 | ||
2061 | set_fs(KERNEL_DS); | |
2062 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2063 | set_fs(oldfs); | |
2064 | } else | |
2065 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2066 | |
2067 | if (err == 0) { | |
2068 | err = -ENOBUFS; | |
af284937 DL |
2069 | dev = __dev_get_by_name(net, p.name); |
2070 | if (!dev) | |
1da177e4 LT |
2071 | goto err_exit; |
2072 | err = dev_open(dev); | |
2073 | } | |
2074 | } | |
0be669bb | 2075 | #endif |
1da177e4 LT |
2076 | |
2077 | err_exit: | |
2078 | rtnl_unlock(); | |
2079 | return err; | |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | * Manual configuration of address on an interface | |
2084 | */ | |
af284937 | 2085 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2086 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2087 | __u32 valid_lft) |
1da177e4 LT |
2088 | { |
2089 | struct inet6_ifaddr *ifp; | |
2090 | struct inet6_dev *idev; | |
2091 | struct net_device *dev; | |
2092 | int scope; | |
6f704992 YH |
2093 | u32 flags; |
2094 | clock_t expires; | |
4bed72e4 | 2095 | unsigned long timeout; |
1da177e4 LT |
2096 | |
2097 | ASSERT_RTNL(); | |
1ab1457c | 2098 | |
24ef0da7 TG |
2099 | if (plen > 128) |
2100 | return -EINVAL; | |
2101 | ||
0778769d NT |
2102 | /* check the lifetime */ |
2103 | if (!valid_lft || prefered_lft > valid_lft) | |
2104 | return -EINVAL; | |
2105 | ||
af284937 DL |
2106 | dev = __dev_get_by_index(net, ifindex); |
2107 | if (!dev) | |
1da177e4 | 2108 | return -ENODEV; |
1ab1457c | 2109 | |
1da177e4 LT |
2110 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2111 | return -ENOBUFS; | |
2112 | ||
2113 | scope = ipv6_addr_scope(pfx); | |
2114 | ||
4bed72e4 YH |
2115 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2116 | if (addrconf_finite_timeout(timeout)) { | |
2117 | expires = jiffies_to_clock_t(timeout * HZ); | |
2118 | valid_lft = timeout; | |
6f704992 | 2119 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2120 | } else { |
2121 | expires = 0; | |
2122 | flags = 0; | |
2123 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2124 | } |
0778769d | 2125 | |
4bed72e4 YH |
2126 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2127 | if (addrconf_finite_timeout(timeout)) { | |
2128 | if (timeout == 0) | |
2129 | ifa_flags |= IFA_F_DEPRECATED; | |
2130 | prefered_lft = timeout; | |
2131 | } | |
0778769d NT |
2132 | |
2133 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2134 | ||
1da177e4 | 2135 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2136 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2137 | ifp->valid_lft = valid_lft; |
2138 | ifp->prefered_lft = prefered_lft; | |
2139 | ifp->tstamp = jiffies; | |
06aebfb7 | 2140 | spin_unlock_bh(&ifp->lock); |
0778769d | 2141 | |
46d48046 | 2142 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2143 | expires, flags); |
95c385b4 NH |
2144 | /* |
2145 | * Note that section 3.1 of RFC 4429 indicates | |
2146 | * that the Optimistic flag should not be set for | |
2147 | * manually configured addresses | |
2148 | */ | |
1da177e4 LT |
2149 | addrconf_dad_start(ifp, 0); |
2150 | in6_ifa_put(ifp); | |
0778769d | 2151 | addrconf_verify(0); |
1da177e4 LT |
2152 | return 0; |
2153 | } | |
2154 | ||
2155 | return PTR_ERR(ifp); | |
2156 | } | |
2157 | ||
af284937 | 2158 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2159 | unsigned int plen) |
1da177e4 LT |
2160 | { |
2161 | struct inet6_ifaddr *ifp; | |
2162 | struct inet6_dev *idev; | |
2163 | struct net_device *dev; | |
1ab1457c | 2164 | |
24ef0da7 TG |
2165 | if (plen > 128) |
2166 | return -EINVAL; | |
2167 | ||
af284937 DL |
2168 | dev = __dev_get_by_index(net, ifindex); |
2169 | if (!dev) | |
1da177e4 LT |
2170 | return -ENODEV; |
2171 | ||
2172 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2173 | return -ENXIO; | |
2174 | ||
2175 | read_lock_bh(&idev->lock); | |
2176 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2177 | if (ifp->prefix_len == plen && | |
2178 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2179 | in6_ifa_hold(ifp); | |
2180 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2181 | |
1da177e4 LT |
2182 | ipv6_del_addr(ifp); |
2183 | ||
2184 | /* If the last address is deleted administratively, | |
2185 | disable IPv6 on this interface. | |
2186 | */ | |
2187 | if (idev->addr_list == NULL) | |
2188 | addrconf_ifdown(idev->dev, 1); | |
2189 | return 0; | |
2190 | } | |
2191 | } | |
2192 | read_unlock_bh(&idev->lock); | |
2193 | return -EADDRNOTAVAIL; | |
2194 | } | |
2195 | ||
2196 | ||
af284937 | 2197 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2198 | { |
2199 | struct in6_ifreq ireq; | |
2200 | int err; | |
1ab1457c | 2201 | |
1da177e4 LT |
2202 | if (!capable(CAP_NET_ADMIN)) |
2203 | return -EPERM; | |
1ab1457c | 2204 | |
1da177e4 LT |
2205 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2206 | return -EFAULT; | |
2207 | ||
2208 | rtnl_lock(); | |
af284937 DL |
2209 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2210 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2211 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2212 | rtnl_unlock(); |
2213 | return err; | |
2214 | } | |
2215 | ||
af284937 | 2216 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2217 | { |
2218 | struct in6_ifreq ireq; | |
2219 | int err; | |
1ab1457c | 2220 | |
1da177e4 LT |
2221 | if (!capable(CAP_NET_ADMIN)) |
2222 | return -EPERM; | |
2223 | ||
2224 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2225 | return -EFAULT; | |
2226 | ||
2227 | rtnl_lock(); | |
af284937 DL |
2228 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2229 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2230 | rtnl_unlock(); |
2231 | return err; | |
2232 | } | |
2233 | ||
b5f348e5 IJ |
2234 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2235 | int plen, int scope) | |
2236 | { | |
2237 | struct inet6_ifaddr *ifp; | |
2238 | ||
2239 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2240 | if (!IS_ERR(ifp)) { | |
2241 | spin_lock_bh(&ifp->lock); | |
2242 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2243 | spin_unlock_bh(&ifp->lock); | |
2244 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2245 | in6_ifa_put(ifp); | |
2246 | } | |
2247 | } | |
2248 | ||
0be669bb | 2249 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2250 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2251 | { | |
1da177e4 LT |
2252 | struct in6_addr addr; |
2253 | struct net_device *dev; | |
c346dca1 | 2254 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2255 | int scope; |
2256 | ||
2257 | ASSERT_RTNL(); | |
2258 | ||
2259 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2260 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2261 | ||
2262 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2263 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2264 | scope = IFA_LINK; | |
2265 | } else { | |
2266 | scope = IPV6_ADDR_COMPATv4; | |
2267 | } | |
2268 | ||
2269 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2270 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2271 | return; |
2272 | } | |
2273 | ||
6fda7350 | 2274 | for_each_netdev(net, dev) { |
e5ed6399 | 2275 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2276 | if (in_dev && (dev->flags & IFF_UP)) { |
2277 | struct in_ifaddr * ifa; | |
2278 | ||
2279 | int flag = scope; | |
2280 | ||
2281 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2282 | int plen; | |
2283 | ||
2284 | addr.s6_addr32[3] = ifa->ifa_local; | |
2285 | ||
2286 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2287 | continue; | |
2288 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2289 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2290 | continue; | |
2291 | flag |= IFA_HOST; | |
2292 | } | |
2293 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2294 | plen = 64; | |
2295 | else | |
2296 | plen = 96; | |
2297 | ||
b5f348e5 | 2298 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2299 | } |
2300 | } | |
1ab1457c | 2301 | } |
1da177e4 | 2302 | } |
0be669bb | 2303 | #endif |
1da177e4 LT |
2304 | |
2305 | static void init_loopback(struct net_device *dev) | |
2306 | { | |
2307 | struct inet6_dev *idev; | |
1da177e4 LT |
2308 | |
2309 | /* ::1 */ | |
2310 | ||
2311 | ASSERT_RTNL(); | |
2312 | ||
2313 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2314 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2315 | return; | |
2316 | } | |
2317 | ||
b5f348e5 | 2318 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2319 | } |
2320 | ||
2321 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2322 | { | |
2323 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2324 | u32 addr_flags = IFA_F_PERMANENT; |
2325 | ||
2326 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2327 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2328 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2329 | addr_flags |= IFA_F_OPTIMISTIC; |
2330 | #endif | |
1da177e4 | 2331 | |
95c385b4 NH |
2332 | |
2333 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2334 | if (!IS_ERR(ifp)) { |
46d48046 | 2335 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2336 | addrconf_dad_start(ifp, 0); |
2337 | in6_ifa_put(ifp); | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | static void addrconf_dev_config(struct net_device *dev) | |
2342 | { | |
2343 | struct in6_addr addr; | |
2344 | struct inet6_dev * idev; | |
2345 | ||
2346 | ASSERT_RTNL(); | |
2347 | ||
74235a25 HX |
2348 | if ((dev->type != ARPHRD_ETHER) && |
2349 | (dev->type != ARPHRD_FDDI) && | |
2350 | (dev->type != ARPHRD_IEEE802_TR) && | |
2351 | (dev->type != ARPHRD_ARCNET) && | |
2352 | (dev->type != ARPHRD_INFINIBAND)) { | |
2353 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2354 | return; | |
2355 | } | |
2356 | ||
1da177e4 LT |
2357 | idev = addrconf_add_dev(dev); |
2358 | if (idev == NULL) | |
2359 | return; | |
2360 | ||
2361 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2362 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2363 | ||
2364 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2365 | addrconf_add_linklocal(idev, &addr); | |
2366 | } | |
2367 | ||
0be669bb | 2368 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2369 | static void addrconf_sit_config(struct net_device *dev) |
2370 | { | |
2371 | struct inet6_dev *idev; | |
2372 | ||
2373 | ASSERT_RTNL(); | |
2374 | ||
1ab1457c YH |
2375 | /* |
2376 | * Configure the tunnel with one of our IPv4 | |
2377 | * addresses... we should configure all of | |
1da177e4 LT |
2378 | * our v4 addrs in the tunnel |
2379 | */ | |
2380 | ||
2381 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2382 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2383 | return; | |
2384 | } | |
2385 | ||
c7dc89c0 FT |
2386 | if (dev->priv_flags & IFF_ISATAP) { |
2387 | struct in6_addr addr; | |
2388 | ||
2389 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2390 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2391 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2392 | addrconf_add_linklocal(idev, &addr); | |
2393 | return; | |
2394 | } | |
2395 | ||
1da177e4 LT |
2396 | sit_add_v4_addrs(idev); |
2397 | ||
2398 | if (dev->flags&IFF_POINTOPOINT) { | |
2399 | addrconf_add_mroute(dev); | |
2400 | addrconf_add_lroute(dev); | |
2401 | } else | |
2402 | sit_route_add(dev); | |
2403 | } | |
0be669bb | 2404 | #endif |
1da177e4 LT |
2405 | |
2406 | static inline int | |
2407 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2408 | { | |
2409 | struct in6_addr lladdr; | |
2410 | ||
95c385b4 | 2411 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2412 | addrconf_add_linklocal(idev, &lladdr); |
2413 | return 0; | |
2414 | } | |
2415 | return -1; | |
2416 | } | |
2417 | ||
2418 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2419 | { | |
2420 | struct net_device *link_dev; | |
c346dca1 | 2421 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2422 | |
2423 | /* first try to inherit the link-local address from the link device */ | |
2424 | if (idev->dev->iflink && | |
6fda7350 | 2425 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2426 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2427 | return; | |
2428 | } | |
2429 | /* then try to inherit it from any device */ | |
6fda7350 | 2430 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2431 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2432 | return; | |
2433 | } | |
2434 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2435 | } | |
2436 | ||
2437 | /* | |
2438 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2439 | * DHCPv6, MLD etc. can be run over the virtual link | |
2440 | */ | |
2441 | ||
2442 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2443 | { | |
2444 | struct inet6_dev *idev; | |
2445 | ||
2446 | ASSERT_RTNL(); | |
2447 | ||
2448 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2449 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2450 | return; | |
2451 | } | |
2452 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2453 | } |
2454 | ||
1ab1457c | 2455 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2456 | void * data) |
2457 | { | |
2458 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2459 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2460 | int run_pending = 0; |
b217d616 | 2461 | int err; |
1da177e4 LT |
2462 | |
2463 | switch(event) { | |
45ba9dd2 | 2464 | case NETDEV_REGISTER: |
74235a25 | 2465 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2466 | idev = ipv6_add_dev(dev); |
2467 | if (!idev) | |
b217d616 | 2468 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2469 | } |
2470 | break; | |
1da177e4 | 2471 | case NETDEV_UP: |
3c21edbd | 2472 | case NETDEV_CHANGE: |
c2edacf8 JV |
2473 | if (dev->flags & IFF_SLAVE) |
2474 | break; | |
2475 | ||
3c21edbd | 2476 | if (event == NETDEV_UP) { |
f24e3d65 | 2477 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2478 | /* device is not ready yet. */ |
2479 | printk(KERN_INFO | |
2480 | "ADDRCONF(NETDEV_UP): %s: " | |
2481 | "link is not ready\n", | |
2482 | dev->name); | |
2483 | break; | |
2484 | } | |
99081049 | 2485 | |
d31c7b8f EP |
2486 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2487 | idev = ipv6_add_dev(dev); | |
2488 | ||
e3ec6cfc | 2489 | if (idev) { |
99081049 | 2490 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2491 | run_pending = 1; |
2492 | } | |
3c21edbd | 2493 | } else { |
f24e3d65 | 2494 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2495 | /* device is still not ready. */ |
2496 | break; | |
2497 | } | |
2498 | ||
2499 | if (idev) { | |
2500 | if (idev->if_flags & IF_READY) { | |
2501 | /* device is already configured. */ | |
2502 | break; | |
2503 | } | |
2504 | idev->if_flags |= IF_READY; | |
2505 | } | |
2506 | ||
2507 | printk(KERN_INFO | |
2508 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2509 | "link becomes ready\n", | |
2510 | dev->name); | |
2511 | ||
c5e33bdd | 2512 | run_pending = 1; |
3c21edbd YH |
2513 | } |
2514 | ||
1da177e4 | 2515 | switch(dev->type) { |
0be669bb | 2516 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2517 | case ARPHRD_SIT: |
2518 | addrconf_sit_config(dev); | |
2519 | break; | |
0be669bb | 2520 | #endif |
1da177e4 LT |
2521 | case ARPHRD_TUNNEL6: |
2522 | addrconf_ip6_tnl_config(dev); | |
2523 | break; | |
2524 | case ARPHRD_LOOPBACK: | |
2525 | init_loopback(dev); | |
2526 | break; | |
2527 | ||
2528 | default: | |
2529 | addrconf_dev_config(dev); | |
2530 | break; | |
3ff50b79 | 2531 | } |
1da177e4 | 2532 | if (idev) { |
c5e33bdd YH |
2533 | if (run_pending) |
2534 | addrconf_dad_run(idev); | |
2535 | ||
1da177e4 LT |
2536 | /* If the MTU changed during the interface down, when the |
2537 | interface up, the changed MTU must be reflected in the | |
2538 | idev as well as routers. | |
2539 | */ | |
2540 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2541 | rt6_mtu_change(dev, dev->mtu); | |
2542 | idev->cnf.mtu6 = dev->mtu; | |
2543 | } | |
2544 | idev->tstamp = jiffies; | |
2545 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2546 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2547 | stop IPv6 on this interface. | |
2548 | */ | |
2549 | if (dev->mtu < IPV6_MIN_MTU) | |
2550 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2551 | } | |
2552 | break; | |
2553 | ||
2554 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2555 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2556 | rt6_mtu_change(dev, dev->mtu); |
2557 | idev->cnf.mtu6 = dev->mtu; | |
2558 | break; | |
2559 | } | |
2560 | ||
d31c7b8f EP |
2561 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2562 | idev = ipv6_add_dev(dev); | |
2563 | if (idev) | |
2564 | break; | |
2565 | } | |
2566 | ||
1da177e4 LT |
2567 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2568 | ||
2569 | case NETDEV_DOWN: | |
2570 | case NETDEV_UNREGISTER: | |
2571 | /* | |
2572 | * Remove all addresses from this interface. | |
2573 | */ | |
2574 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2575 | break; | |
3c21edbd | 2576 | |
1da177e4 | 2577 | case NETDEV_CHANGENAME: |
1da177e4 | 2578 | if (idev) { |
5632c515 | 2579 | snmp6_unregister_dev(idev); |
408c4768 | 2580 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2581 | addrconf_sysctl_register(idev); |
b217d616 HX |
2582 | err = snmp6_register_dev(idev); |
2583 | if (err) | |
2584 | return notifier_from_errno(err); | |
5632c515 | 2585 | } |
1da177e4 | 2586 | break; |
93d9b7d7 JP |
2587 | case NETDEV_PRE_TYPE_CHANGE: |
2588 | case NETDEV_POST_TYPE_CHANGE: | |
2589 | addrconf_type_change(dev, event); | |
75c78500 | 2590 | break; |
3ff50b79 | 2591 | } |
1da177e4 LT |
2592 | |
2593 | return NOTIFY_OK; | |
2594 | } | |
2595 | ||
2596 | /* | |
2597 | * addrconf module should be notified of a device going up | |
2598 | */ | |
2599 | static struct notifier_block ipv6_dev_notf = { | |
2600 | .notifier_call = addrconf_notify, | |
2601 | .priority = 0 | |
2602 | }; | |
2603 | ||
93d9b7d7 | 2604 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2605 | { |
2606 | struct inet6_dev *idev; | |
2607 | ASSERT_RTNL(); | |
2608 | ||
2609 | idev = __in6_dev_get(dev); | |
2610 | ||
93d9b7d7 | 2611 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2612 | ipv6_mc_remap(idev); |
93d9b7d7 | 2613 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2614 | ipv6_mc_unmap(idev); |
2615 | } | |
2616 | ||
1da177e4 LT |
2617 | static int addrconf_ifdown(struct net_device *dev, int how) |
2618 | { | |
2619 | struct inet6_dev *idev; | |
8f37ada5 | 2620 | struct inet6_ifaddr *ifa, *keep_list, **bifa; |
c346dca1 | 2621 | struct net *net = dev_net(dev); |
1da177e4 LT |
2622 | int i; |
2623 | ||
2624 | ASSERT_RTNL(); | |
2625 | ||
f3db4851 | 2626 | rt6_ifdown(net, dev); |
1da177e4 LT |
2627 | neigh_ifdown(&nd_tbl, dev); |
2628 | ||
2629 | idev = __in6_dev_get(dev); | |
2630 | if (idev == NULL) | |
2631 | return -ENODEV; | |
2632 | ||
2633 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2634 | Do not dev_put! |
1da177e4 | 2635 | */ |
439e2385 | 2636 | if (how) { |
1da177e4 | 2637 | idev->dead = 1; |
8814c4b5 YH |
2638 | |
2639 | /* protected by rtnl_lock */ | |
2640 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2641 | |
2642 | /* Step 1.5: remove snmp6 entry */ | |
2643 | snmp6_unregister_dev(idev); | |
2644 | ||
2645 | } | |
2646 | ||
2647 | /* Step 2: clear hash table */ | |
2648 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2649 | bifa = &inet6_addr_lst[i]; | |
2650 | ||
2651 | write_lock_bh(&addrconf_hash_lock); | |
2652 | while ((ifa = *bifa) != NULL) { | |
dc2b99f7 | 2653 | if (ifa->idev == idev && |
84e8b803 | 2654 | (how || !(ifa->flags&IFA_F_PERMANENT) || |
2655 | ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2656 | *bifa = ifa->lst_next; |
2657 | ifa->lst_next = NULL; | |
84e8b803 | 2658 | __in6_ifa_put(ifa); |
1da177e4 LT |
2659 | continue; |
2660 | } | |
2661 | bifa = &ifa->lst_next; | |
2662 | } | |
2663 | write_unlock_bh(&addrconf_hash_lock); | |
2664 | } | |
2665 | ||
2666 | write_lock_bh(&idev->lock); | |
2667 | ||
2668 | /* Step 3: clear flags for stateless addrconf */ | |
439e2385 | 2669 | if (!how) |
3c21edbd | 2670 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2671 | |
2672 | /* Step 4: clear address list */ | |
2673 | #ifdef CONFIG_IPV6_PRIVACY | |
439e2385 | 2674 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2675 | in6_dev_put(idev); |
2676 | ||
2677 | /* clear tempaddr list */ | |
2678 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2679 | idev->tempaddr_list = ifa->tmp_next; | |
2680 | ifa->tmp_next = NULL; | |
2681 | ifa->dead = 1; | |
2682 | write_unlock_bh(&idev->lock); | |
2683 | spin_lock_bh(&ifa->lock); | |
2684 | ||
2685 | if (ifa->ifpub) { | |
2686 | in6_ifa_put(ifa->ifpub); | |
2687 | ifa->ifpub = NULL; | |
2688 | } | |
2689 | spin_unlock_bh(&ifa->lock); | |
2690 | in6_ifa_put(ifa); | |
2691 | write_lock_bh(&idev->lock); | |
2692 | } | |
2693 | #endif | |
8f37ada5 | 2694 | keep_list = NULL; |
2695 | bifa = &keep_list; | |
2696 | while ((ifa = idev->addr_list) != NULL) { | |
2697 | idev->addr_list = ifa->if_next; | |
2698 | ifa->if_next = NULL; | |
2699 | ||
84e8b803 | 2700 | addrconf_del_timer(ifa); |
2701 | ||
2702 | /* If just doing link down, and address is permanent | |
2703 | and not link-local, then retain it. */ | |
2704 | if (how == 0 && | |
2705 | (ifa->flags&IFA_F_PERMANENT) && | |
2706 | !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { | |
8f37ada5 | 2707 | |
2708 | /* Move to holding list */ | |
2709 | *bifa = ifa; | |
dc2b99f7 | 2710 | bifa = &ifa->if_next; |
2711 | ||
84e8b803 | 2712 | /* If not doing DAD on this address, just keep it. */ |
2713 | if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) || | |
2714 | idev->cnf.accept_dad <= 0 || | |
2715 | (ifa->flags & IFA_F_NODAD)) | |
2716 | continue; | |
2717 | ||
2718 | /* If it was tentative already, no need to notify */ | |
2719 | if (ifa->flags & IFA_F_TENTATIVE) | |
2720 | continue; | |
2721 | ||
2722 | /* Flag it for later restoration when link comes up */ | |
2723 | ifa->flags |= IFA_F_TENTATIVE; | |
2724 | in6_ifa_hold(ifa); | |
dc2b99f7 | 2725 | } else { |
dc2b99f7 | 2726 | ifa->dead = 1; |
84e8b803 | 2727 | } |
2728 | write_unlock_bh(&idev->lock); | |
1da177e4 | 2729 | |
84e8b803 | 2730 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
2731 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); | |
2732 | in6_ifa_put(ifa); | |
dc2b99f7 | 2733 | |
84e8b803 | 2734 | write_lock_bh(&idev->lock); |
1da177e4 | 2735 | } |
8f37ada5 | 2736 | |
2737 | idev->addr_list = keep_list; | |
2738 | ||
1da177e4 LT |
2739 | write_unlock_bh(&idev->lock); |
2740 | ||
2741 | /* Step 5: Discard multicast list */ | |
2742 | ||
439e2385 | 2743 | if (how) |
1da177e4 LT |
2744 | ipv6_mc_destroy_dev(idev); |
2745 | else | |
2746 | ipv6_mc_down(idev); | |
2747 | ||
1da177e4 | 2748 | idev->tstamp = jiffies; |
1ab1457c | 2749 | |
1da177e4 LT |
2750 | /* Shot the device (if unregistered) */ |
2751 | ||
439e2385 | 2752 | if (how) { |
408c4768 | 2753 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2754 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2755 | neigh_ifdown(&nd_tbl, dev); | |
2756 | in6_dev_put(idev); | |
2757 | } | |
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | static void addrconf_rs_timer(unsigned long data) | |
2762 | { | |
2763 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2764 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2765 | |
5b2a1953 | 2766 | read_lock(&idev->lock); |
2767 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2768 | goto out; |
2769 | ||
5b2a1953 | 2770 | if (idev->cnf.forwarding) |
2771 | goto out; | |
2772 | ||
2773 | /* Announcement received after solicitation was sent */ | |
2774 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2775 | goto out; |
1da177e4 LT |
2776 | |
2777 | spin_lock(&ifp->lock); | |
5b2a1953 | 2778 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2779 | /* The wait after the last probe can be shorter */ |
2780 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2781 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2782 | idev->cnf.rtr_solicit_delay : | |
2783 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2784 | spin_unlock(&ifp->lock); |
2785 | ||
5b2a1953 | 2786 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2787 | } else { |
2788 | spin_unlock(&ifp->lock); | |
2789 | /* | |
2790 | * Note: we do not support deprecated "all on-link" | |
2791 | * assumption any longer. | |
2792 | */ | |
2793 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
5b2a1953 | 2794 | idev->dev->name); |
1da177e4 LT |
2795 | } |
2796 | ||
2797 | out: | |
5b2a1953 | 2798 | read_unlock(&idev->lock); |
1da177e4 LT |
2799 | in6_ifa_put(ifp); |
2800 | } | |
2801 | ||
2802 | /* | |
2803 | * Duplicate Address Detection | |
2804 | */ | |
3c21edbd YH |
2805 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2806 | { | |
2807 | unsigned long rand_num; | |
2808 | struct inet6_dev *idev = ifp->idev; | |
2809 | ||
95c385b4 NH |
2810 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2811 | rand_num = 0; | |
2812 | else | |
2813 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2814 | ||
3c21edbd YH |
2815 | ifp->probes = idev->cnf.dad_transmits; |
2816 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2817 | } | |
2818 | ||
e431b8c0 | 2819 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2820 | { |
2821 | struct inet6_dev *idev = ifp->idev; | |
2822 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2823 | |
2824 | addrconf_join_solict(dev, &ifp->addr); | |
2825 | ||
1da177e4 | 2826 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2827 | |
2828 | read_lock_bh(&idev->lock); | |
2829 | if (ifp->dead) | |
2830 | goto out; | |
1da177e4 | 2831 | |
21809faf | 2832 | spin_lock(&ifp->lock); |
1da177e4 | 2833 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
1b34be74 | 2834 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2835 | !(ifp->flags&IFA_F_TENTATIVE) || |
2836 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2837 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2838 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2839 | read_unlock_bh(&idev->lock); |
2840 | ||
2841 | addrconf_dad_completed(ifp); | |
2842 | return; | |
2843 | } | |
2844 | ||
6732bade | 2845 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2846 | spin_unlock(&ifp->lock); |
6732bade | 2847 | read_unlock_bh(&idev->lock); |
3c21edbd | 2848 | /* |
590a9887 | 2849 | * If the device is not ready: |
3c21edbd YH |
2850 | * - keep it tentative if it is a permanent address. |
2851 | * - otherwise, kill it. | |
2852 | */ | |
2853 | in6_ifa_hold(ifp); | |
cc411d0b | 2854 | addrconf_dad_stop(ifp, 0); |
6732bade | 2855 | return; |
3c21edbd | 2856 | } |
95c385b4 NH |
2857 | |
2858 | /* | |
2859 | * Optimistic nodes can start receiving | |
2860 | * Frames right away | |
2861 | */ | |
2862 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2863 | ip6_ins_rt(ifp->rt); | |
2864 | ||
6732bade | 2865 | addrconf_dad_kick(ifp); |
21809faf | 2866 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2867 | out: |
2868 | read_unlock_bh(&idev->lock); | |
2869 | } | |
2870 | ||
2871 | static void addrconf_dad_timer(unsigned long data) | |
2872 | { | |
2873 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2874 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2875 | struct in6_addr mcaddr; |
2876 | ||
122e4519 | 2877 | read_lock(&idev->lock); |
2878 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2879 | read_unlock(&idev->lock); | |
1da177e4 LT |
2880 | goto out; |
2881 | } | |
21809faf | 2882 | |
2883 | spin_lock(&ifp->lock); | |
1da177e4 LT |
2884 | if (ifp->probes == 0) { |
2885 | /* | |
2886 | * DAD was successful | |
2887 | */ | |
2888 | ||
cc411d0b | 2889 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2890 | spin_unlock(&ifp->lock); |
122e4519 | 2891 | read_unlock(&idev->lock); |
1da177e4 LT |
2892 | |
2893 | addrconf_dad_completed(ifp); | |
2894 | ||
2895 | goto out; | |
2896 | } | |
2897 | ||
2898 | ifp->probes--; | |
2899 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 2900 | spin_unlock(&ifp->lock); |
122e4519 | 2901 | read_unlock(&idev->lock); |
1da177e4 LT |
2902 | |
2903 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2904 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2905 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2906 | out: |
2907 | in6_ifa_put(ifp); | |
2908 | } | |
2909 | ||
2910 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2911 | { | |
2912 | struct net_device * dev = ifp->idev->dev; | |
2913 | ||
2914 | /* | |
2915 | * Configure the address for reception. Now it is valid. | |
2916 | */ | |
2917 | ||
2918 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2919 | ||
2920 | /* If added prefix is link local and forwarding is off, | |
2921 | start sending router solicitations. | |
2922 | */ | |
2923 | ||
2924 | if (ifp->idev->cnf.forwarding == 0 && | |
2925 | ifp->idev->cnf.rtr_solicits > 0 && | |
2926 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2927 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2928 | /* |
2929 | * If a host as already performed a random delay | |
2930 | * [...] as part of DAD [...] there is no need | |
2931 | * to delay again before sending the first RS | |
2932 | */ | |
f3ee4010 | 2933 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2934 | |
2935 | spin_lock_bh(&ifp->lock); | |
2936 | ifp->probes = 1; | |
2937 | ifp->idev->if_flags |= IF_RS_SENT; | |
2938 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2939 | spin_unlock_bh(&ifp->lock); | |
2940 | } | |
2941 | } | |
2942 | ||
c5e33bdd YH |
2943 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2944 | struct inet6_ifaddr *ifp; | |
2945 | ||
2946 | read_lock_bh(&idev->lock); | |
2947 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
21809faf | 2948 | spin_lock(&ifp->lock); |
c5e33bdd | 2949 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
21809faf | 2950 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2951 | continue; |
2952 | } | |
21809faf | 2953 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
2954 | addrconf_dad_kick(ifp); |
2955 | } | |
2956 | read_unlock_bh(&idev->lock); | |
2957 | } | |
2958 | ||
1da177e4 LT |
2959 | #ifdef CONFIG_PROC_FS |
2960 | struct if6_iter_state { | |
3c40090a | 2961 | struct seq_net_private p; |
1da177e4 LT |
2962 | int bucket; |
2963 | }; | |
2964 | ||
2965 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2966 | { | |
2967 | struct inet6_ifaddr *ifa = NULL; | |
2968 | struct if6_iter_state *state = seq->private; | |
1218854a | 2969 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2970 | |
2971 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2972 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2973 | |
878628fb | 2974 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2975 | ifa = ifa->lst_next; |
1da177e4 LT |
2976 | if (ifa) |
2977 | break; | |
2978 | } | |
2979 | return ifa; | |
2980 | } | |
2981 | ||
2982 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2983 | { | |
2984 | struct if6_iter_state *state = seq->private; | |
1218854a | 2985 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2986 | |
2987 | ifa = ifa->lst_next; | |
2988 | try_again: | |
3c40090a | 2989 | if (ifa) { |
878628fb | 2990 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2991 | ifa = ifa->lst_next; |
2992 | goto try_again; | |
2993 | } | |
2994 | } | |
2995 | ||
1da177e4 LT |
2996 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2997 | ifa = inet6_addr_lst[state->bucket]; | |
2998 | goto try_again; | |
2999 | } | |
3c40090a | 3000 | |
1da177e4 LT |
3001 | return ifa; |
3002 | } | |
3003 | ||
3004 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
3005 | { | |
3006 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
3007 | ||
3008 | if (ifa) | |
3009 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
3010 | --pos; | |
3011 | return pos ? NULL : ifa; | |
3012 | } | |
3013 | ||
3014 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 3015 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
3016 | { |
3017 | read_lock_bh(&addrconf_hash_lock); | |
3018 | return if6_get_idx(seq, *pos); | |
3019 | } | |
3020 | ||
3021 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3022 | { | |
3023 | struct inet6_ifaddr *ifa; | |
3024 | ||
3025 | ifa = if6_get_next(seq, v); | |
3026 | ++*pos; | |
3027 | return ifa; | |
3028 | } | |
3029 | ||
3030 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 3031 | __releases(addrconf_hash_lock) |
1da177e4 LT |
3032 | { |
3033 | read_unlock_bh(&addrconf_hash_lock); | |
3034 | } | |
3035 | ||
3036 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3037 | { | |
3038 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3039 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3040 | &ifp->addr, |
1da177e4 LT |
3041 | ifp->idev->dev->ifindex, |
3042 | ifp->prefix_len, | |
3043 | ifp->scope, | |
3044 | ifp->flags, | |
3045 | ifp->idev->dev->name); | |
3046 | return 0; | |
3047 | } | |
3048 | ||
56b3d975 | 3049 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3050 | .start = if6_seq_start, |
3051 | .next = if6_seq_next, | |
3052 | .show = if6_seq_show, | |
3053 | .stop = if6_seq_stop, | |
3054 | }; | |
3055 | ||
3056 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3057 | { | |
3c40090a DL |
3058 | return seq_open_net(inode, file, &if6_seq_ops, |
3059 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3060 | } |
3061 | ||
9a32144e | 3062 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3063 | .owner = THIS_MODULE, |
3064 | .open = if6_seq_open, | |
3065 | .read = seq_read, | |
3066 | .llseek = seq_lseek, | |
3c40090a | 3067 | .release = seq_release_net, |
1da177e4 LT |
3068 | }; |
3069 | ||
2c8c1e72 | 3070 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3071 | { |
3c40090a | 3072 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3073 | return -ENOMEM; |
3074 | return 0; | |
3075 | } | |
3076 | ||
2c8c1e72 | 3077 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3078 | { |
3079 | proc_net_remove(net, "if_inet6"); | |
3080 | } | |
3081 | ||
3082 | static struct pernet_operations if6_proc_net_ops = { | |
3083 | .init = if6_proc_net_init, | |
3084 | .exit = if6_proc_net_exit, | |
3085 | }; | |
3086 | ||
3087 | int __init if6_proc_init(void) | |
3088 | { | |
3089 | return register_pernet_subsys(&if6_proc_net_ops); | |
3090 | } | |
3091 | ||
1da177e4 LT |
3092 | void if6_proc_exit(void) |
3093 | { | |
3c40090a | 3094 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3095 | } |
3096 | #endif /* CONFIG_PROC_FS */ | |
3097 | ||
59fbb3a6 | 3098 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3099 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3100 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3101 | { |
3102 | int ret = 0; | |
3103 | struct inet6_ifaddr * ifp; | |
3104 | u8 hash = ipv6_addr_hash(addr); | |
3105 | read_lock_bh(&addrconf_hash_lock); | |
3106 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 3107 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3108 | continue; |
caad295f | 3109 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3110 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3111 | ret = 1; | |
3112 | break; | |
3113 | } | |
3114 | } | |
3115 | read_unlock_bh(&addrconf_hash_lock); | |
3116 | return ret; | |
3117 | } | |
3118 | #endif | |
3119 | ||
1da177e4 LT |
3120 | /* |
3121 | * Periodic address status verification | |
3122 | */ | |
3123 | ||
3124 | static void addrconf_verify(unsigned long foo) | |
3125 | { | |
3126 | struct inet6_ifaddr *ifp; | |
3127 | unsigned long now, next; | |
3128 | int i; | |
3129 | ||
3130 | spin_lock_bh(&addrconf_verify_lock); | |
3131 | now = jiffies; | |
3132 | next = now + ADDR_CHECK_FREQUENCY; | |
3133 | ||
3134 | del_timer(&addr_chk_timer); | |
3135 | ||
3136 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3137 | ||
3138 | restart: | |
5d5780df | 3139 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
3140 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
3141 | unsigned long age; | |
3142 | #ifdef CONFIG_IPV6_PRIVACY | |
3143 | unsigned long regen_advance; | |
3144 | #endif | |
3145 | ||
3146 | if (ifp->flags & IFA_F_PERMANENT) | |
3147 | continue; | |
3148 | ||
3149 | spin_lock(&ifp->lock); | |
3150 | age = (now - ifp->tstamp) / HZ; | |
3151 | ||
3152 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3153 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3154 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3155 | ifp->idev->nd_parms->retrans_time / HZ; |
3156 | #endif | |
3157 | ||
8f27ebb9 YH |
3158 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3159 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3160 | spin_unlock(&ifp->lock); |
3161 | in6_ifa_hold(ifp); | |
5d5780df | 3162 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3163 | ipv6_del_addr(ifp); |
3164 | goto restart; | |
8f27ebb9 YH |
3165 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3166 | spin_unlock(&ifp->lock); | |
3167 | continue; | |
1da177e4 | 3168 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3169 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3170 | int deprecate = 0; |
3171 | ||
3172 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3173 | deprecate = 1; | |
3174 | ifp->flags |= IFA_F_DEPRECATED; | |
3175 | } | |
3176 | ||
3177 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3178 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3179 | ||
3180 | spin_unlock(&ifp->lock); | |
3181 | ||
3182 | if (deprecate) { | |
3183 | in6_ifa_hold(ifp); | |
5d5780df | 3184 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3185 | |
3186 | ipv6_ifa_notify(0, ifp); | |
3187 | in6_ifa_put(ifp); | |
3188 | goto restart; | |
3189 | } | |
3190 | #ifdef CONFIG_IPV6_PRIVACY | |
3191 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3192 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3193 | if (age >= ifp->prefered_lft - regen_advance) { | |
3194 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3195 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3196 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3197 | if (!ifp->regen_count && ifpub) { | |
3198 | ifp->regen_count++; | |
3199 | in6_ifa_hold(ifp); | |
3200 | in6_ifa_hold(ifpub); | |
3201 | spin_unlock(&ifp->lock); | |
5d5780df | 3202 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3203 | spin_lock(&ifpub->lock); |
3204 | ifpub->regen_count = 0; | |
3205 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3206 | ipv6_create_tempaddr(ifpub, ifp); |
3207 | in6_ifa_put(ifpub); | |
3208 | in6_ifa_put(ifp); | |
3209 | goto restart; | |
3210 | } | |
3211 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3212 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3213 | spin_unlock(&ifp->lock); | |
3214 | #endif | |
3215 | } else { | |
3216 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3217 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3218 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3219 | spin_unlock(&ifp->lock); | |
3220 | } | |
3221 | } | |
5d5780df | 3222 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3223 | } |
3224 | ||
3225 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3226 | add_timer(&addr_chk_timer); | |
3227 | spin_unlock_bh(&addrconf_verify_lock); | |
3228 | } | |
3229 | ||
461d8837 TG |
3230 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3231 | { | |
3232 | struct in6_addr *pfx = NULL; | |
3233 | ||
3234 | if (addr) | |
3235 | pfx = nla_data(addr); | |
3236 | ||
3237 | if (local) { | |
3238 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3239 | pfx = NULL; | |
3240 | else | |
3241 | pfx = nla_data(local); | |
3242 | } | |
3243 | ||
3244 | return pfx; | |
3245 | } | |
3246 | ||
ef7c79ed | 3247 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3248 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3249 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3250 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3251 | }; | |
3252 | ||
1da177e4 LT |
3253 | static int |
3254 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3255 | { | |
3b1e0a65 | 3256 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3257 | struct ifaddrmsg *ifm; |
3258 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3259 | struct in6_addr *pfx; |
b933f716 | 3260 | int err; |
1da177e4 | 3261 | |
b933f716 TG |
3262 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3263 | if (err < 0) | |
3264 | return err; | |
3265 | ||
3266 | ifm = nlmsg_data(nlh); | |
3267 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3268 | if (pfx == NULL) |
3269 | return -EINVAL; | |
3270 | ||
af284937 | 3271 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3272 | } |
3273 | ||
55ebaef1 NT |
3274 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3275 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3276 | { |
6f704992 YH |
3277 | u32 flags; |
3278 | clock_t expires; | |
4bed72e4 | 3279 | unsigned long timeout; |
46d48046 | 3280 | |
081bba5b NT |
3281 | if (!valid_lft || (prefered_lft > valid_lft)) |
3282 | return -EINVAL; | |
3283 | ||
4bed72e4 YH |
3284 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3285 | if (addrconf_finite_timeout(timeout)) { | |
3286 | expires = jiffies_to_clock_t(timeout * HZ); | |
3287 | valid_lft = timeout; | |
6f704992 | 3288 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3289 | } else { |
3290 | expires = 0; | |
3291 | flags = 0; | |
3292 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3293 | } |
081bba5b | 3294 | |
4bed72e4 YH |
3295 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3296 | if (addrconf_finite_timeout(timeout)) { | |
3297 | if (timeout == 0) | |
3298 | ifa_flags |= IFA_F_DEPRECATED; | |
3299 | prefered_lft = timeout; | |
3300 | } | |
081bba5b NT |
3301 | |
3302 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3303 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3304 | ifp->tstamp = jiffies; |
3305 | ifp->valid_lft = valid_lft; | |
3306 | ifp->prefered_lft = prefered_lft; | |
3307 | ||
3308 | spin_unlock_bh(&ifp->lock); | |
3309 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3310 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3311 | |
46d48046 | 3312 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3313 | expires, flags); |
081bba5b NT |
3314 | addrconf_verify(0); |
3315 | ||
3316 | return 0; | |
3317 | } | |
3318 | ||
1da177e4 LT |
3319 | static int |
3320 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3321 | { | |
3b1e0a65 | 3322 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3323 | struct ifaddrmsg *ifm; |
3324 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3325 | struct in6_addr *pfx; |
7198f8ce TG |
3326 | struct inet6_ifaddr *ifa; |
3327 | struct net_device *dev; | |
55ebaef1 NT |
3328 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3329 | u8 ifa_flags; | |
461d8837 | 3330 | int err; |
1da177e4 | 3331 | |
461d8837 TG |
3332 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3333 | if (err < 0) | |
3334 | return err; | |
3335 | ||
3336 | ifm = nlmsg_data(nlh); | |
3337 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3338 | if (pfx == NULL) |
3339 | return -EINVAL; | |
3340 | ||
461d8837 | 3341 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3342 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3343 | |
3344 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3345 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3346 | preferred_lft = ci->ifa_prefered; |
3347 | } else { | |
3348 | preferred_lft = INFINITY_LIFE_TIME; | |
3349 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3350 | } |
3351 | ||
af284937 | 3352 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3353 | if (dev == NULL) |
3354 | return -ENODEV; | |
3355 | ||
55ebaef1 | 3356 | /* We ignore other flags so far. */ |
3b9f9a1c | 3357 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3358 | |
1cab3da6 | 3359 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3360 | if (ifa == NULL) { |
3361 | /* | |
3362 | * It would be best to check for !NLM_F_CREATE here but | |
3363 | * userspace alreay relies on not having to provide this. | |
3364 | */ | |
af284937 DL |
3365 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3366 | ifm->ifa_prefixlen, ifa_flags, | |
3367 | preferred_lft, valid_lft); | |
081bba5b NT |
3368 | } |
3369 | ||
7198f8ce TG |
3370 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3371 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3372 | err = -EEXIST; | |
3373 | else | |
55ebaef1 | 3374 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3375 | |
3376 | in6_ifa_put(ifa); | |
3377 | ||
3378 | return err; | |
1da177e4 LT |
3379 | } |
3380 | ||
101bb229 TG |
3381 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3382 | u8 scope, int ifindex) | |
3383 | { | |
3384 | struct ifaddrmsg *ifm; | |
3385 | ||
3386 | ifm = nlmsg_data(nlh); | |
3387 | ifm->ifa_family = AF_INET6; | |
3388 | ifm->ifa_prefixlen = prefixlen; | |
3389 | ifm->ifa_flags = flags; | |
3390 | ifm->ifa_scope = scope; | |
3391 | ifm->ifa_index = ifindex; | |
3392 | } | |
3393 | ||
85486af0 TG |
3394 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3395 | unsigned long tstamp, u32 preferred, u32 valid) | |
3396 | { | |
3397 | struct ifa_cacheinfo ci; | |
3398 | ||
3399 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3400 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3401 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3402 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3403 | ci.ifa_prefered = preferred; | |
3404 | ci.ifa_valid = valid; | |
3405 | ||
3406 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3407 | } | |
3408 | ||
101bb229 TG |
3409 | static inline int rt_scope(int ifa_scope) |
3410 | { | |
3411 | if (ifa_scope & IFA_HOST) | |
3412 | return RT_SCOPE_HOST; | |
3413 | else if (ifa_scope & IFA_LINK) | |
3414 | return RT_SCOPE_LINK; | |
3415 | else if (ifa_scope & IFA_SITE) | |
3416 | return RT_SCOPE_SITE; | |
3417 | else | |
3418 | return RT_SCOPE_UNIVERSE; | |
3419 | } | |
3420 | ||
0ab6803b TG |
3421 | static inline int inet6_ifaddr_msgsize(void) |
3422 | { | |
339bf98f TG |
3423 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3424 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3425 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3426 | } |
c5396a31 | 3427 | |
1da177e4 | 3428 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3429 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3430 | { |
1da177e4 | 3431 | struct nlmsghdr *nlh; |
85486af0 | 3432 | u32 preferred, valid; |
1da177e4 | 3433 | |
0ab6803b TG |
3434 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3435 | if (nlh == NULL) | |
26932566 | 3436 | return -EMSGSIZE; |
0ab6803b | 3437 | |
101bb229 TG |
3438 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3439 | ifa->idev->dev->ifindex); | |
3440 | ||
1da177e4 | 3441 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3442 | preferred = ifa->prefered_lft; |
3443 | valid = ifa->valid_lft; | |
3444 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3445 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3446 | if (preferred > tval) |
3447 | preferred -= tval; | |
3448 | else | |
3449 | preferred = 0; | |
85486af0 TG |
3450 | if (valid != INFINITY_LIFE_TIME) |
3451 | valid -= tval; | |
1da177e4 LT |
3452 | } |
3453 | } else { | |
85486af0 TG |
3454 | preferred = INFINITY_LIFE_TIME; |
3455 | valid = INFINITY_LIFE_TIME; | |
3456 | } | |
3457 | ||
0ab6803b | 3458 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3459 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3460 | nlmsg_cancel(skb, nlh); | |
3461 | return -EMSGSIZE; | |
3462 | } | |
1da177e4 | 3463 | |
0ab6803b | 3464 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3465 | } |
3466 | ||
3467 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3468 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3469 | { |
1da177e4 | 3470 | struct nlmsghdr *nlh; |
101bb229 TG |
3471 | u8 scope = RT_SCOPE_UNIVERSE; |
3472 | int ifindex = ifmca->idev->dev->ifindex; | |
3473 | ||
3474 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3475 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3476 | |
0ab6803b TG |
3477 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3478 | if (nlh == NULL) | |
26932566 | 3479 | return -EMSGSIZE; |
85486af0 | 3480 | |
0ab6803b TG |
3481 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3482 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3483 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3484 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3485 | nlmsg_cancel(skb, nlh); | |
3486 | return -EMSGSIZE; | |
3487 | } | |
85486af0 | 3488 | |
0ab6803b | 3489 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3490 | } |
3491 | ||
3492 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3493 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3494 | { |
1da177e4 | 3495 | struct nlmsghdr *nlh; |
101bb229 TG |
3496 | u8 scope = RT_SCOPE_UNIVERSE; |
3497 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3498 | ||
3499 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3500 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3501 | |
0ab6803b TG |
3502 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3503 | if (nlh == NULL) | |
26932566 | 3504 | return -EMSGSIZE; |
85486af0 | 3505 | |
0ab6803b TG |
3506 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3507 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3508 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3509 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3510 | nlmsg_cancel(skb, nlh); | |
3511 | return -EMSGSIZE; | |
3512 | } | |
1da177e4 | 3513 | |
0ab6803b | 3514 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3515 | } |
3516 | ||
3517 | enum addr_type_t | |
3518 | { | |
3519 | UNICAST_ADDR, | |
3520 | MULTICAST_ADDR, | |
3521 | ANYCAST_ADDR, | |
3522 | }; | |
3523 | ||
234b27c3 ED |
3524 | /* called with rcu_read_lock() */ |
3525 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3526 | struct netlink_callback *cb, enum addr_type_t type, | |
3527 | int s_ip_idx, int *p_ip_idx) | |
3528 | { | |
3529 | struct inet6_ifaddr *ifa; | |
3530 | struct ifmcaddr6 *ifmca; | |
3531 | struct ifacaddr6 *ifaca; | |
3532 | int err = 1; | |
3533 | int ip_idx = *p_ip_idx; | |
3534 | ||
3535 | read_lock_bh(&idev->lock); | |
3536 | switch (type) { | |
3537 | case UNICAST_ADDR: | |
3538 | /* unicast address incl. temp addr */ | |
3539 | for (ifa = idev->addr_list; ifa; | |
3540 | ifa = ifa->if_next, ip_idx++) { | |
3541 | if (ip_idx < s_ip_idx) | |
3542 | continue; | |
3543 | err = inet6_fill_ifaddr(skb, ifa, | |
3544 | NETLINK_CB(cb->skb).pid, | |
3545 | cb->nlh->nlmsg_seq, | |
3546 | RTM_NEWADDR, | |
3547 | NLM_F_MULTI); | |
3548 | if (err <= 0) | |
3549 | break; | |
3550 | } | |
3551 | break; | |
3552 | case MULTICAST_ADDR: | |
3553 | /* multicast address */ | |
3554 | for (ifmca = idev->mc_list; ifmca; | |
3555 | ifmca = ifmca->next, ip_idx++) { | |
3556 | if (ip_idx < s_ip_idx) | |
3557 | continue; | |
3558 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3559 | NETLINK_CB(cb->skb).pid, | |
3560 | cb->nlh->nlmsg_seq, | |
3561 | RTM_GETMULTICAST, | |
3562 | NLM_F_MULTI); | |
3563 | if (err <= 0) | |
3564 | break; | |
3565 | } | |
3566 | break; | |
3567 | case ANYCAST_ADDR: | |
3568 | /* anycast address */ | |
3569 | for (ifaca = idev->ac_list; ifaca; | |
3570 | ifaca = ifaca->aca_next, ip_idx++) { | |
3571 | if (ip_idx < s_ip_idx) | |
3572 | continue; | |
3573 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3574 | NETLINK_CB(cb->skb).pid, | |
3575 | cb->nlh->nlmsg_seq, | |
3576 | RTM_GETANYCAST, | |
3577 | NLM_F_MULTI); | |
3578 | if (err <= 0) | |
3579 | break; | |
3580 | } | |
3581 | break; | |
3582 | default: | |
3583 | break; | |
3584 | } | |
3585 | read_unlock_bh(&idev->lock); | |
3586 | *p_ip_idx = ip_idx; | |
3587 | return err; | |
3588 | } | |
3589 | ||
1da177e4 LT |
3590 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3591 | enum addr_type_t type) | |
3592 | { | |
234b27c3 ED |
3593 | struct net *net = sock_net(skb->sk); |
3594 | int h, s_h; | |
1da177e4 LT |
3595 | int idx, ip_idx; |
3596 | int s_idx, s_ip_idx; | |
1da177e4 | 3597 | struct net_device *dev; |
234b27c3 ED |
3598 | struct inet6_dev *idev; |
3599 | struct hlist_head *head; | |
3600 | struct hlist_node *node; | |
1ab1457c | 3601 | |
234b27c3 ED |
3602 | s_h = cb->args[0]; |
3603 | s_idx = idx = cb->args[1]; | |
3604 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3605 | |
234b27c3 ED |
3606 | rcu_read_lock(); |
3607 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3608 | idx = 0; | |
3609 | head = &net->dev_index_head[h]; | |
3610 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3611 | if (idx < s_idx) | |
3612 | goto cont; | |
3613 | if (idx > s_idx) | |
3614 | s_ip_idx = 0; | |
3615 | ip_idx = 0; | |
3616 | if ((idev = __in6_dev_get(dev)) == NULL) | |
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 | |
1cab3da6 | 3683 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3684 | err = -EADDRNOTAVAIL; |
3685 | goto errout; | |
3686 | } | |
6c223828 | 3687 | |
0ab6803b | 3688 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3689 | err = -ENOBUFS; |
1b29fc2c | 3690 | goto errout_ifa; |
6c223828 NT |
3691 | } |
3692 | ||
6c223828 NT |
3693 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3694 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3695 | if (err < 0) { |
3696 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3697 | WARN_ON(err == -EMSGSIZE); | |
3698 | kfree_skb(skb); | |
3699 | goto errout_ifa; | |
3700 | } | |
6fda7350 | 3701 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3702 | errout_ifa: |
6c223828 | 3703 | in6_ifa_put(ifa); |
1b29fc2c | 3704 | errout: |
6c223828 | 3705 | return err; |
6c223828 NT |
3706 | } |
3707 | ||
1da177e4 LT |
3708 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3709 | { | |
3710 | struct sk_buff *skb; | |
c346dca1 | 3711 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3712 | int err = -ENOBUFS; |
1da177e4 | 3713 | |
0ab6803b | 3714 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3715 | if (skb == NULL) |
3716 | goto errout; | |
3717 | ||
3718 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3719 | if (err < 0) { |
3720 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3721 | WARN_ON(err == -EMSGSIZE); | |
3722 | kfree_skb(skb); | |
3723 | goto errout; | |
3724 | } | |
1ce85fe4 PNA |
3725 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3726 | return; | |
5d620266 TG |
3727 | errout: |
3728 | if (err < 0) | |
6fda7350 | 3729 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3730 | } |
3731 | ||
b6f99a21 | 3732 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3733 | __s32 *array, int bytes) |
3734 | { | |
04561c1f TG |
3735 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3736 | ||
1da177e4 LT |
3737 | memset(array, 0, bytes); |
3738 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3739 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3740 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3741 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3742 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3743 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3744 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3745 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3746 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3747 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3748 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3749 | #ifdef CONFIG_IPV6_PRIVACY | |
3750 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3751 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3752 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3753 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3754 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3755 | #endif | |
3756 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3757 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3758 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3759 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3760 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3761 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3762 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3763 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3764 | #endif | |
930d6ff2 | 3765 | #endif |
fbea49e1 | 3766 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3767 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3768 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3769 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3770 | #endif | |
7bc570c8 YH |
3771 | #ifdef CONFIG_IPV6_MROUTE |
3772 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3773 | #endif | |
778d80be | 3774 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3775 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3776 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3777 | } |
3778 | ||
339bf98f TG |
3779 | static inline size_t inet6_if_nlmsg_size(void) |
3780 | { | |
3781 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3782 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3783 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3784 | + nla_total_size(4) /* IFLA_MTU */ | |
3785 | + nla_total_size(4) /* IFLA_LINK */ | |
3786 | + nla_total_size( /* IFLA_PROTINFO */ | |
3787 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3788 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3789 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3790 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3791 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3792 | ); |
3793 | } | |
c5396a31 | 3794 | |
7d720c3e TH |
3795 | static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib, |
3796 | int items, int bytes) | |
7f7d9a6b HX |
3797 | { |
3798 | int i; | |
3799 | int pad = bytes - sizeof(u64) * items; | |
3800 | BUG_ON(pad < 0); | |
3801 | ||
3802 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3803 | put_unaligned(items, &stats[0]); | |
3804 | for (i = 1; i < items; i++) | |
3805 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3806 | ||
3807 | memset(&stats[items], 0, pad); | |
3808 | } | |
3809 | ||
3810 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3811 | int bytes) | |
3812 | { | |
3813 | switch(attrtype) { | |
3814 | case IFLA_INET6_STATS: | |
7d720c3e | 3815 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
7f7d9a6b HX |
3816 | break; |
3817 | case IFLA_INET6_ICMP6STATS: | |
7d720c3e | 3818 | __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3819 | break; |
3820 | } | |
3821 | } | |
3822 | ||
1ab1457c | 3823 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3824 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3825 | { |
04561c1f | 3826 | struct net_device *dev = idev->dev; |
bf99f1bd | 3827 | struct nlattr *nla; |
04561c1f TG |
3828 | struct ifinfomsg *hdr; |
3829 | struct nlmsghdr *nlh; | |
3830 | void *protoinfo; | |
3831 | struct ifla_cacheinfo ci; | |
3832 | ||
3833 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3834 | if (nlh == NULL) | |
26932566 | 3835 | return -EMSGSIZE; |
04561c1f TG |
3836 | |
3837 | hdr = nlmsg_data(nlh); | |
3838 | hdr->ifi_family = AF_INET6; | |
3839 | hdr->__ifi_pad = 0; | |
3840 | hdr->ifi_type = dev->type; | |
3841 | hdr->ifi_index = dev->ifindex; | |
3842 | hdr->ifi_flags = dev_get_flags(dev); | |
3843 | hdr->ifi_change = 0; | |
3844 | ||
3845 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3846 | |
3847 | if (dev->addr_len) | |
04561c1f | 3848 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3849 | |
04561c1f | 3850 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3851 | if (dev->ifindex != dev->iflink) |
04561c1f | 3852 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3853 | |
04561c1f TG |
3854 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3855 | if (protoinfo == NULL) | |
3856 | goto nla_put_failure; | |
1da177e4 | 3857 | |
04561c1f | 3858 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3859 | |
1da177e4 LT |
3860 | ci.max_reasm_len = IPV6_MAXPLEN; |
3861 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3862 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3863 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3864 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3865 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3866 | ||
bf99f1bd YH |
3867 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3868 | if (nla == NULL) | |
04561c1f | 3869 | goto nla_put_failure; |
bf99f1bd | 3870 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3871 | |
bf99f1bd YH |
3872 | /* XXX - MC not implemented */ |
3873 | ||
3874 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3875 | if (nla == NULL) | |
3876 | goto nla_put_failure; | |
3877 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3878 | ||
3879 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3880 | if (nla == NULL) | |
3881 | goto nla_put_failure; | |
3882 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3883 | |
04561c1f TG |
3884 | nla_nest_end(skb, protoinfo); |
3885 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3886 | |
04561c1f | 3887 | nla_put_failure: |
26932566 PM |
3888 | nlmsg_cancel(skb, nlh); |
3889 | return -EMSGSIZE; | |
1da177e4 LT |
3890 | } |
3891 | ||
3892 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3893 | { | |
3b1e0a65 | 3894 | struct net *net = sock_net(skb->sk); |
84d2697d | 3895 | int h, s_h; |
434a8a58 | 3896 | int idx = 0, s_idx; |
1da177e4 LT |
3897 | struct net_device *dev; |
3898 | struct inet6_dev *idev; | |
84d2697d ED |
3899 | struct hlist_head *head; |
3900 | struct hlist_node *node; | |
1da177e4 | 3901 | |
84d2697d ED |
3902 | s_h = cb->args[0]; |
3903 | s_idx = cb->args[1]; | |
3904 | ||
3905 | rcu_read_lock(); | |
3906 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3907 | idx = 0; | |
3908 | head = &net->dev_index_head[h]; | |
3909 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3910 | if (idx < s_idx) | |
3911 | goto cont; | |
3912 | idev = __in6_dev_get(dev); | |
3913 | if (!idev) | |
3914 | goto cont; | |
3915 | if (inet6_fill_ifinfo(skb, idev, | |
3916 | NETLINK_CB(cb->skb).pid, | |
3917 | cb->nlh->nlmsg_seq, | |
3918 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
3919 | goto out; | |
7562f876 | 3920 | cont: |
84d2697d ED |
3921 | idx++; |
3922 | } | |
1da177e4 | 3923 | } |
84d2697d ED |
3924 | out: |
3925 | rcu_read_unlock(); | |
3926 | cb->args[1] = idx; | |
3927 | cb->args[0] = h; | |
1da177e4 LT |
3928 | |
3929 | return skb->len; | |
3930 | } | |
3931 | ||
3932 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3933 | { | |
3934 | struct sk_buff *skb; | |
c346dca1 | 3935 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3936 | int err = -ENOBUFS; |
1ab1457c | 3937 | |
339bf98f | 3938 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3939 | if (skb == NULL) |
3940 | goto errout; | |
3941 | ||
3942 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3943 | if (err < 0) { |
3944 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3945 | WARN_ON(err == -EMSGSIZE); | |
3946 | kfree_skb(skb); | |
3947 | goto errout; | |
3948 | } | |
1ce85fe4 PNA |
3949 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3950 | return; | |
8d7a76c9 TG |
3951 | errout: |
3952 | if (err < 0) | |
6fda7350 | 3953 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3954 | } |
3955 | ||
339bf98f TG |
3956 | static inline size_t inet6_prefix_nlmsg_size(void) |
3957 | { | |
3958 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3959 | + nla_total_size(sizeof(struct in6_addr)) | |
3960 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3961 | } | |
c5396a31 | 3962 | |
1da177e4 | 3963 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3964 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3965 | int event, unsigned int flags) | |
1da177e4 | 3966 | { |
6051e2f4 TG |
3967 | struct prefixmsg *pmsg; |
3968 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3969 | struct prefix_cacheinfo ci; |
3970 | ||
6051e2f4 TG |
3971 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3972 | if (nlh == NULL) | |
26932566 | 3973 | return -EMSGSIZE; |
6051e2f4 TG |
3974 | |
3975 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3976 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3977 | pmsg->prefix_pad1 = 0; |
3978 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3979 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3980 | pmsg->prefix_len = pinfo->prefix_len; | |
3981 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3982 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3983 | pmsg->prefix_flags = 0; |
3984 | if (pinfo->onlink) | |
3985 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3986 | if (pinfo->autoconf) | |
3987 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3988 | ||
6051e2f4 | 3989 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3990 | |
3991 | ci.preferred_time = ntohl(pinfo->prefered); | |
3992 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3993 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3994 | |
6051e2f4 | 3995 | return nlmsg_end(skb, nlh); |
1da177e4 | 3996 | |
6051e2f4 | 3997 | nla_put_failure: |
26932566 PM |
3998 | nlmsg_cancel(skb, nlh); |
3999 | return -EMSGSIZE; | |
1da177e4 LT |
4000 | } |
4001 | ||
1ab1457c | 4002 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4003 | struct prefix_info *pinfo) |
4004 | { | |
4005 | struct sk_buff *skb; | |
c346dca1 | 4006 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4007 | int err = -ENOBUFS; |
1da177e4 | 4008 | |
339bf98f | 4009 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4010 | if (skb == NULL) |
4011 | goto errout; | |
4012 | ||
4013 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4014 | if (err < 0) { |
4015 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4016 | WARN_ON(err == -EMSGSIZE); | |
4017 | kfree_skb(skb); | |
4018 | goto errout; | |
4019 | } | |
1ce85fe4 PNA |
4020 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4021 | return; | |
8c384bfa TG |
4022 | errout: |
4023 | if (err < 0) | |
6fda7350 | 4024 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4025 | } |
4026 | ||
1da177e4 LT |
4027 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4028 | { | |
4029 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4030 | ||
4031 | switch (event) { | |
4032 | case RTM_NEWADDR: | |
95c385b4 NH |
4033 | /* |
4034 | * If the address was optimistic | |
4035 | * we inserted the route at the start of | |
4036 | * our DAD process, so we don't need | |
4037 | * to do it again | |
4038 | */ | |
4039 | if (!(ifp->rt->rt6i_node)) | |
4040 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4041 | if (ifp->idev->cnf.forwarding) |
4042 | addrconf_join_anycast(ifp); | |
4043 | break; | |
4044 | case RTM_DELADDR: | |
4045 | if (ifp->idev->cnf.forwarding) | |
4046 | addrconf_leave_anycast(ifp); | |
4047 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
4048 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 4049 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 4050 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
4051 | break; |
4052 | } | |
4053 | } | |
4054 | ||
4055 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4056 | { | |
8814c4b5 | 4057 | rcu_read_lock_bh(); |
1da177e4 LT |
4058 | if (likely(ifp->idev->dead == 0)) |
4059 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4060 | rcu_read_unlock_bh(); |
1da177e4 LT |
4061 | } |
4062 | ||
4063 | #ifdef CONFIG_SYSCTL | |
4064 | ||
4065 | static | |
8d65af78 | 4066 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4067 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4068 | { | |
4069 | int *valp = ctl->data; | |
4070 | int val = *valp; | |
88af182e | 4071 | loff_t pos = *ppos; |
1da177e4 LT |
4072 | int ret; |
4073 | ||
8d65af78 | 4074 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 | 4075 | |
c8fecf22 | 4076 | if (write) |
b325fddb | 4077 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4078 | if (ret) |
4079 | *ppos = pos; | |
1ab1457c | 4080 | return ret; |
1da177e4 LT |
4081 | } |
4082 | ||
56d417b1 BH |
4083 | static void dev_disable_change(struct inet6_dev *idev) |
4084 | { | |
4085 | if (!idev || !idev->dev) | |
4086 | return; | |
4087 | ||
4088 | if (idev->cnf.disable_ipv6) | |
4089 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4090 | else | |
4091 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4092 | } | |
4093 | ||
4094 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4095 | { | |
4096 | struct net_device *dev; | |
4097 | struct inet6_dev *idev; | |
4098 | ||
c6d14c84 ED |
4099 | rcu_read_lock(); |
4100 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4101 | idev = __in6_dev_get(dev); |
4102 | if (idev) { | |
4103 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4104 | idev->cnf.disable_ipv6 = newf; | |
4105 | if (changed) | |
4106 | dev_disable_change(idev); | |
4107 | } | |
56d417b1 | 4108 | } |
c6d14c84 | 4109 | rcu_read_unlock(); |
56d417b1 BH |
4110 | } |
4111 | ||
4112 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) | |
4113 | { | |
4114 | struct net *net; | |
4115 | ||
4116 | net = (struct net *)table->extra2; | |
4117 | ||
4118 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) | |
4119 | return 0; | |
4120 | ||
88af182e EB |
4121 | if (!rtnl_trylock()) { |
4122 | /* Restore the original values before restarting */ | |
4123 | *p = old; | |
56d417b1 | 4124 | return restart_syscall(); |
88af182e | 4125 | } |
56d417b1 BH |
4126 | |
4127 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
4128 | __s32 newf = net->ipv6.devconf_all->disable_ipv6; | |
4129 | net->ipv6.devconf_dflt->disable_ipv6 = newf; | |
4130 | addrconf_disable_change(net, newf); | |
4131 | } else if ((!*p) ^ (!old)) | |
4132 | dev_disable_change((struct inet6_dev *)table->extra1); | |
4133 | ||
4134 | rtnl_unlock(); | |
4135 | return 0; | |
4136 | } | |
4137 | ||
4138 | static | |
8d65af78 | 4139 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4140 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4141 | { | |
4142 | int *valp = ctl->data; | |
4143 | int val = *valp; | |
88af182e | 4144 | loff_t pos = *ppos; |
56d417b1 BH |
4145 | int ret; |
4146 | ||
8d65af78 | 4147 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
56d417b1 BH |
4148 | |
4149 | if (write) | |
4150 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4151 | if (ret) |
4152 | *ppos = pos; | |
56d417b1 BH |
4153 | return ret; |
4154 | } | |
4155 | ||
1da177e4 LT |
4156 | static struct addrconf_sysctl_table |
4157 | { | |
4158 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4159 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4160 | char *dev_name; |
ab32ea5d | 4161 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4162 | .sysctl_header = NULL, |
4163 | .addrconf_vars = { | |
1ab1457c | 4164 | { |
1da177e4 | 4165 | .procname = "forwarding", |
1ab1457c | 4166 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
4167 | .maxlen = sizeof(int), |
4168 | .mode = 0644, | |
6d9f239a | 4169 | .proc_handler = addrconf_sysctl_forward, |
1da177e4 LT |
4170 | }, |
4171 | { | |
1da177e4 | 4172 | .procname = "hop_limit", |
1ab1457c | 4173 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
4174 | .maxlen = sizeof(int), |
4175 | .mode = 0644, | |
4176 | .proc_handler = proc_dointvec, | |
4177 | }, | |
4178 | { | |
1da177e4 LT |
4179 | .procname = "mtu", |
4180 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 4181 | .maxlen = sizeof(int), |
1da177e4 | 4182 | .mode = 0644, |
6d9f239a | 4183 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4184 | }, |
4185 | { | |
1da177e4 | 4186 | .procname = "accept_ra", |
1ab1457c | 4187 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
4188 | .maxlen = sizeof(int), |
4189 | .mode = 0644, | |
6d9f239a | 4190 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4191 | }, |
4192 | { | |
1da177e4 | 4193 | .procname = "accept_redirects", |
1ab1457c | 4194 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
4195 | .maxlen = sizeof(int), |
4196 | .mode = 0644, | |
6d9f239a | 4197 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4198 | }, |
4199 | { | |
1da177e4 | 4200 | .procname = "autoconf", |
1ab1457c | 4201 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
4202 | .maxlen = sizeof(int), |
4203 | .mode = 0644, | |
6d9f239a | 4204 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4205 | }, |
4206 | { | |
1da177e4 | 4207 | .procname = "dad_transmits", |
1ab1457c | 4208 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
4209 | .maxlen = sizeof(int), |
4210 | .mode = 0644, | |
6d9f239a | 4211 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4212 | }, |
4213 | { | |
1da177e4 | 4214 | .procname = "router_solicitations", |
1ab1457c | 4215 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
4216 | .maxlen = sizeof(int), |
4217 | .mode = 0644, | |
6d9f239a | 4218 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4219 | }, |
4220 | { | |
1da177e4 | 4221 | .procname = "router_solicitation_interval", |
1ab1457c | 4222 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
4223 | .maxlen = sizeof(int), |
4224 | .mode = 0644, | |
6d9f239a | 4225 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
4226 | }, |
4227 | { | |
1da177e4 | 4228 | .procname = "router_solicitation_delay", |
1ab1457c | 4229 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
4230 | .maxlen = sizeof(int), |
4231 | .mode = 0644, | |
6d9f239a | 4232 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
4233 | }, |
4234 | { | |
1da177e4 | 4235 | .procname = "force_mld_version", |
1ab1457c | 4236 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
4237 | .maxlen = sizeof(int), |
4238 | .mode = 0644, | |
6d9f239a | 4239 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4240 | }, |
4241 | #ifdef CONFIG_IPV6_PRIVACY | |
4242 | { | |
1da177e4 | 4243 | .procname = "use_tempaddr", |
1ab1457c | 4244 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
4245 | .maxlen = sizeof(int), |
4246 | .mode = 0644, | |
6d9f239a | 4247 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4248 | }, |
4249 | { | |
1da177e4 | 4250 | .procname = "temp_valid_lft", |
1ab1457c | 4251 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
4252 | .maxlen = sizeof(int), |
4253 | .mode = 0644, | |
6d9f239a | 4254 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4255 | }, |
4256 | { | |
1da177e4 | 4257 | .procname = "temp_prefered_lft", |
1ab1457c | 4258 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4259 | .maxlen = sizeof(int), |
4260 | .mode = 0644, | |
6d9f239a | 4261 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4262 | }, |
4263 | { | |
1da177e4 | 4264 | .procname = "regen_max_retry", |
1ab1457c | 4265 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4266 | .maxlen = sizeof(int), |
4267 | .mode = 0644, | |
6d9f239a | 4268 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4269 | }, |
4270 | { | |
1da177e4 | 4271 | .procname = "max_desync_factor", |
1ab1457c | 4272 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4273 | .maxlen = sizeof(int), |
4274 | .mode = 0644, | |
6d9f239a | 4275 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4276 | }, |
4277 | #endif | |
4278 | { | |
1da177e4 LT |
4279 | .procname = "max_addresses", |
4280 | .data = &ipv6_devconf.max_addresses, | |
4281 | .maxlen = sizeof(int), | |
4282 | .mode = 0644, | |
6d9f239a | 4283 | .proc_handler = proc_dointvec, |
1da177e4 | 4284 | }, |
65f5c7c1 | 4285 | { |
65f5c7c1 | 4286 | .procname = "accept_ra_defrtr", |
1ab1457c | 4287 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4288 | .maxlen = sizeof(int), |
4289 | .mode = 0644, | |
6d9f239a | 4290 | .proc_handler = proc_dointvec, |
65f5c7c1 | 4291 | }, |
c4fd30eb | 4292 | { |
c4fd30eb | 4293 | .procname = "accept_ra_pinfo", |
1ab1457c | 4294 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4295 | .maxlen = sizeof(int), |
4296 | .mode = 0644, | |
6d9f239a | 4297 | .proc_handler = proc_dointvec, |
c4fd30eb | 4298 | }, |
930d6ff2 YH |
4299 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4300 | { | |
930d6ff2 YH |
4301 | .procname = "accept_ra_rtr_pref", |
4302 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4303 | .maxlen = sizeof(int), | |
4304 | .mode = 0644, | |
6d9f239a | 4305 | .proc_handler = proc_dointvec, |
930d6ff2 | 4306 | }, |
52e16356 | 4307 | { |
52e16356 YH |
4308 | .procname = "router_probe_interval", |
4309 | .data = &ipv6_devconf.rtr_probe_interval, | |
4310 | .maxlen = sizeof(int), | |
4311 | .mode = 0644, | |
6d9f239a | 4312 | .proc_handler = proc_dointvec_jiffies, |
52e16356 | 4313 | }, |
fa03ef38 | 4314 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4315 | { |
09c884d4 YH |
4316 | .procname = "accept_ra_rt_info_max_plen", |
4317 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4318 | .maxlen = sizeof(int), | |
4319 | .mode = 0644, | |
6d9f239a | 4320 | .proc_handler = proc_dointvec, |
09c884d4 YH |
4321 | }, |
4322 | #endif | |
930d6ff2 | 4323 | #endif |
fbea49e1 | 4324 | { |
fbea49e1 YH |
4325 | .procname = "proxy_ndp", |
4326 | .data = &ipv6_devconf.proxy_ndp, | |
4327 | .maxlen = sizeof(int), | |
4328 | .mode = 0644, | |
6d9f239a | 4329 | .proc_handler = proc_dointvec, |
fbea49e1 | 4330 | }, |
0bcbc926 | 4331 | { |
0bcbc926 YH |
4332 | .procname = "accept_source_route", |
4333 | .data = &ipv6_devconf.accept_source_route, | |
4334 | .maxlen = sizeof(int), | |
4335 | .mode = 0644, | |
6d9f239a | 4336 | .proc_handler = proc_dointvec, |
0bcbc926 | 4337 | }, |
95c385b4 NH |
4338 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4339 | { | |
95c385b4 NH |
4340 | .procname = "optimistic_dad", |
4341 | .data = &ipv6_devconf.optimistic_dad, | |
4342 | .maxlen = sizeof(int), | |
4343 | .mode = 0644, | |
6d9f239a | 4344 | .proc_handler = proc_dointvec, |
95c385b4 NH |
4345 | |
4346 | }, | |
7bc570c8 YH |
4347 | #endif |
4348 | #ifdef CONFIG_IPV6_MROUTE | |
4349 | { | |
7bc570c8 YH |
4350 | .procname = "mc_forwarding", |
4351 | .data = &ipv6_devconf.mc_forwarding, | |
4352 | .maxlen = sizeof(int), | |
a4e6db07 | 4353 | .mode = 0444, |
6d9f239a | 4354 | .proc_handler = proc_dointvec, |
7bc570c8 | 4355 | }, |
95c385b4 | 4356 | #endif |
778d80be | 4357 | { |
778d80be YH |
4358 | .procname = "disable_ipv6", |
4359 | .data = &ipv6_devconf.disable_ipv6, | |
4360 | .maxlen = sizeof(int), | |
4361 | .mode = 0644, | |
56d417b1 | 4362 | .proc_handler = addrconf_sysctl_disable, |
778d80be | 4363 | }, |
1b34be74 | 4364 | { |
1b34be74 YH |
4365 | .procname = "accept_dad", |
4366 | .data = &ipv6_devconf.accept_dad, | |
4367 | .maxlen = sizeof(int), | |
4368 | .mode = 0644, | |
6d9f239a | 4369 | .proc_handler = proc_dointvec, |
1b34be74 | 4370 | }, |
f7734fdf | 4371 | { |
f7734fdf OP |
4372 | .procname = "force_tllao", |
4373 | .data = &ipv6_devconf.force_tllao, | |
4374 | .maxlen = sizeof(int), | |
4375 | .mode = 0644, | |
4376 | .proc_handler = proc_dointvec | |
4377 | }, | |
1da177e4 | 4378 | { |
f8572d8f | 4379 | /* sentinel */ |
1da177e4 LT |
4380 | } |
4381 | }, | |
1da177e4 LT |
4382 | }; |
4383 | ||
bff16c2f | 4384 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4385 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4386 | { |
4387 | int i; | |
1da177e4 | 4388 | struct addrconf_sysctl_table *t; |
1da177e4 | 4389 | |
1dab6222 PE |
4390 | #define ADDRCONF_CTL_PATH_DEV 3 |
4391 | ||
4392 | struct ctl_path addrconf_ctl_path[] = { | |
f8572d8f EB |
4393 | { .procname = "net", }, |
4394 | { .procname = "ipv6", }, | |
4395 | { .procname = "conf", }, | |
1dab6222 PE |
4396 | { /* to be set */ }, |
4397 | { }, | |
4398 | }; | |
4399 | ||
4400 | ||
af879cc7 | 4401 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4402 | if (t == NULL) |
f68635e6 PE |
4403 | goto out; |
4404 | ||
1da177e4 LT |
4405 | for (i=0; t->addrconf_vars[i].data; i++) { |
4406 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4407 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4408 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4409 | } |
1da177e4 | 4410 | |
1ab1457c YH |
4411 | /* |
4412 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4413 | * by sysctl and we wouldn't want anyone to change it under our feet |
4414 | * (see SIOCSIFNAME). | |
1ab1457c | 4415 | */ |
1dab6222 PE |
4416 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4417 | if (!t->dev_name) | |
f68635e6 | 4418 | goto free; |
1da177e4 | 4419 | |
1dab6222 | 4420 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
1da177e4 | 4421 | |
bff16c2f | 4422 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4423 | t->addrconf_vars); |
1da177e4 LT |
4424 | if (t->sysctl_header == NULL) |
4425 | goto free_procname; | |
f68635e6 PE |
4426 | |
4427 | p->sysctl = t; | |
95897312 | 4428 | return 0; |
1da177e4 | 4429 | |
f68635e6 | 4430 | free_procname: |
1dab6222 | 4431 | kfree(t->dev_name); |
f68635e6 | 4432 | free: |
1da177e4 | 4433 | kfree(t); |
f68635e6 | 4434 | out: |
95897312 | 4435 | return -ENOBUFS; |
1da177e4 LT |
4436 | } |
4437 | ||
408c4768 PE |
4438 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4439 | { | |
4440 | struct addrconf_sysctl_table *t; | |
4441 | ||
4442 | if (p->sysctl == NULL) | |
4443 | return; | |
4444 | ||
4445 | t = p->sysctl; | |
4446 | p->sysctl = NULL; | |
4447 | unregister_sysctl_table(t->sysctl_header); | |
4448 | kfree(t->dev_name); | |
4449 | kfree(t); | |
4450 | } | |
4451 | ||
f52295a9 PE |
4452 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4453 | { | |
54716e3b | 4454 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4455 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4456 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4457 | idev, &idev->cnf); |
f52295a9 PE |
4458 | } |
4459 | ||
408c4768 | 4460 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4461 | { |
408c4768 PE |
4462 | __addrconf_sysctl_unregister(&idev->cnf); |
4463 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4464 | } |
4465 | ||
4466 | ||
4467 | #endif | |
4468 | ||
2c8c1e72 | 4469 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4470 | { |
4471 | int err; | |
4472 | struct ipv6_devconf *all, *dflt; | |
4473 | ||
4474 | err = -ENOMEM; | |
4475 | all = &ipv6_devconf; | |
4476 | dflt = &ipv6_devconf_dflt; | |
4477 | ||
09ad9bc7 | 4478 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4479 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4480 | if (all == NULL) | |
4481 | goto err_alloc_all; | |
4482 | ||
4483 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4484 | if (dflt == NULL) | |
4485 | goto err_alloc_dflt; | |
56d417b1 BH |
4486 | } else { |
4487 | /* these will be inherited by all namespaces */ | |
4488 | dflt->autoconf = ipv6_defaults.autoconf; | |
4489 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4490 | } |
4491 | ||
4492 | net->ipv6.devconf_all = all; | |
4493 | net->ipv6.devconf_dflt = dflt; | |
4494 | ||
4495 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4496 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4497 | if (err < 0) |
4498 | goto err_reg_all; | |
4499 | ||
f8572d8f | 4500 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4501 | if (err < 0) |
4502 | goto err_reg_dflt; | |
4503 | #endif | |
4504 | return 0; | |
4505 | ||
4506 | #ifdef CONFIG_SYSCTL | |
4507 | err_reg_dflt: | |
4508 | __addrconf_sysctl_unregister(all); | |
4509 | err_reg_all: | |
4510 | kfree(dflt); | |
4511 | #endif | |
4512 | err_alloc_dflt: | |
4513 | kfree(all); | |
4514 | err_alloc_all: | |
4515 | return err; | |
4516 | } | |
4517 | ||
2c8c1e72 | 4518 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4519 | { |
4520 | #ifdef CONFIG_SYSCTL | |
4521 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4522 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4523 | #endif | |
09ad9bc7 | 4524 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4525 | kfree(net->ipv6.devconf_dflt); |
4526 | kfree(net->ipv6.devconf_all); | |
4527 | } | |
4528 | } | |
4529 | ||
4530 | static struct pernet_operations addrconf_ops = { | |
4531 | .init = addrconf_init_net, | |
4532 | .exit = addrconf_exit_net, | |
4533 | }; | |
4534 | ||
1da177e4 LT |
4535 | /* |
4536 | * Device notifier | |
4537 | */ | |
4538 | ||
4539 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4540 | { | |
1ab1457c | 4541 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4542 | } |
4543 | ||
7159039a YH |
4544 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4545 | ||
1da177e4 LT |
4546 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4547 | { | |
1ab1457c | 4548 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4549 | } |
4550 | ||
7159039a YH |
4551 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4552 | ||
1da177e4 LT |
4553 | /* |
4554 | * Init / cleanup code | |
4555 | */ | |
4556 | ||
4557 | int __init addrconf_init(void) | |
4558 | { | |
2a8cc6c8 YH |
4559 | int err; |
4560 | ||
4561 | if ((err = ipv6_addr_label_init()) < 0) { | |
4562 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4563 | err); | |
4564 | return err; | |
4565 | } | |
1da177e4 | 4566 | |
e0da5a48 PE |
4567 | register_pernet_subsys(&addrconf_ops); |
4568 | ||
1da177e4 LT |
4569 | /* The addrconf netdev notifier requires that loopback_dev |
4570 | * has it's ipv6 private information allocated and setup | |
4571 | * before it can bring up and give link-local addresses | |
4572 | * to other devices which are up. | |
4573 | * | |
4574 | * Unfortunately, loopback_dev is not necessarily the first | |
4575 | * entry in the global dev_base list of net devices. In fact, | |
4576 | * it is likely to be the very last entry on that list. | |
4577 | * So this causes the notifier registry below to try and | |
4578 | * give link-local addresses to all devices besides loopback_dev | |
4579 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4580 | * devices to fail to get a link-local address. | |
4581 | * | |
4582 | * So, as a temporary fix, allocate the ipv6 structure for | |
4583 | * loopback_dev first by hand. | |
4584 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4585 | * device and it being up should be removed. | |
4586 | */ | |
4587 | rtnl_lock(); | |
2774c7ab | 4588 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4589 | err = -ENOMEM; |
4590 | rtnl_unlock(); | |
4591 | if (err) | |
e0da5a48 | 4592 | goto errlo; |
1da177e4 LT |
4593 | |
4594 | register_netdevice_notifier(&ipv6_dev_notf); | |
4595 | ||
1da177e4 | 4596 | addrconf_verify(0); |
c127ea2c TG |
4597 | |
4598 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4599 | if (err < 0) | |
4600 | goto errout; | |
4601 | ||
4602 | /* Only the first call to __rtnl_register can fail */ | |
4603 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4604 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4605 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4606 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4607 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4608 | ||
2a8cc6c8 YH |
4609 | ipv6_addr_label_rtnl_register(); |
4610 | ||
1da177e4 | 4611 | return 0; |
c127ea2c TG |
4612 | errout: |
4613 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4614 | errlo: |
4615 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4616 | |
4617 | return err; | |
1da177e4 LT |
4618 | } |
4619 | ||
09f7709f | 4620 | void addrconf_cleanup(void) |
1da177e4 | 4621 | { |
1ab1457c | 4622 | struct inet6_ifaddr *ifa; |
176c39af | 4623 | struct net_device *dev; |
1da177e4 LT |
4624 | int i; |
4625 | ||
4626 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4627 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4628 | |
4629 | rtnl_lock(); | |
4630 | ||
176c39af DL |
4631 | /* clean dev list */ |
4632 | for_each_netdev(&init_net, dev) { | |
4633 | if (__in6_dev_get(dev) == NULL) | |
4634 | continue; | |
4635 | addrconf_ifdown(dev, 1); | |
4636 | } | |
4637 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4638 | ||
1da177e4 LT |
4639 | /* |
4640 | * Check hash table. | |
4641 | */ | |
1da177e4 LT |
4642 | write_lock_bh(&addrconf_hash_lock); |
4643 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4644 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4645 | struct inet6_ifaddr *bifa; | |
4646 | ||
4647 | bifa = ifa; | |
4648 | ifa = ifa->lst_next; | |
4649 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4650 | /* Do not free it; something is wrong. | |
4651 | Now we can investigate it with debugger. | |
4652 | */ | |
4653 | } | |
4654 | } | |
4655 | write_unlock_bh(&addrconf_hash_lock); | |
4656 | ||
4657 | del_timer(&addr_chk_timer); | |
1da177e4 | 4658 | rtnl_unlock(); |
1da177e4 | 4659 | } |