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> | |
43 | #include <linux/socket.h> | |
44 | #include <linux/sockios.h> | |
1da177e4 LT |
45 | #include <linux/net.h> |
46 | #include <linux/in6.h> | |
47 | #include <linux/netdevice.h> | |
1823730f | 48 | #include <linux/if_addr.h> |
1da177e4 LT |
49 | #include <linux/if_arp.h> |
50 | #include <linux/if_arcnet.h> | |
51 | #include <linux/if_infiniband.h> | |
52 | #include <linux/route.h> | |
53 | #include <linux/inetdevice.h> | |
54 | #include <linux/init.h> | |
55 | #ifdef CONFIG_SYSCTL | |
56 | #include <linux/sysctl.h> | |
57 | #endif | |
4fc268d2 | 58 | #include <linux/capability.h> |
1da177e4 LT |
59 | #include <linux/delay.h> |
60 | #include <linux/notifier.h> | |
543537bd | 61 | #include <linux/string.h> |
1da177e4 | 62 | |
457c4cbc | 63 | #include <net/net_namespace.h> |
1da177e4 LT |
64 | #include <net/sock.h> |
65 | #include <net/snmp.h> | |
66 | ||
67 | #include <net/ipv6.h> | |
68 | #include <net/protocol.h> | |
69 | #include <net/ndisc.h> | |
70 | #include <net/ip6_route.h> | |
71 | #include <net/addrconf.h> | |
72 | #include <net/tcp.h> | |
73 | #include <net/ip.h> | |
5d620266 | 74 | #include <net/netlink.h> |
f24e3d65 | 75 | #include <net/pkt_sched.h> |
1da177e4 LT |
76 | #include <linux/if_tunnel.h> |
77 | #include <linux/rtnetlink.h> | |
78 | ||
79 | #ifdef CONFIG_IPV6_PRIVACY | |
80 | #include <linux/random.h> | |
1da177e4 LT |
81 | #endif |
82 | ||
83 | #include <asm/uaccess.h> | |
7f7d9a6b | 84 | #include <asm/unaligned.h> |
1da177e4 LT |
85 | |
86 | #include <linux/proc_fs.h> | |
87 | #include <linux/seq_file.h> | |
88 | ||
89 | /* Set to 3 to get tracing... */ | |
90 | #define ACONF_DEBUG 2 | |
91 | ||
92 | #if ACONF_DEBUG >= 3 | |
93 | #define ADBG(x) printk x | |
94 | #else | |
95 | #define ADBG(x) | |
96 | #endif | |
97 | ||
98 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
99 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
100 | ||
101 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 102 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
103 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
104 | #else | |
105 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
106 | { | |
107 | } | |
108 | ||
109 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
110 | { | |
111 | } | |
1da177e4 LT |
112 | #endif |
113 | ||
114 | #ifdef CONFIG_IPV6_PRIVACY | |
115 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 116 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
117 | static void ipv6_regen_rndid(unsigned long data); |
118 | ||
119 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
120 | #endif |
121 | ||
1b34be74 | 122 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
123 | static int ipv6_count_addresses(struct inet6_dev *idev); |
124 | ||
125 | /* | |
126 | * Configured unicast address hash table | |
127 | */ | |
128 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
129 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
130 | ||
1da177e4 LT |
131 | static void addrconf_verify(unsigned long); |
132 | ||
8d06afab | 133 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
134 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
135 | ||
136 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
137 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
138 | ||
139 | static int addrconf_ifdown(struct net_device *dev, int how); | |
140 | ||
e431b8c0 | 141 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
142 | static void addrconf_dad_timer(unsigned long data); |
143 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 144 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
145 | static void addrconf_rs_timer(unsigned long data); |
146 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
147 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
148 | ||
1ab1457c | 149 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 150 | struct prefix_info *pinfo); |
06bfe655 DL |
151 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
152 | struct net_device *dev); | |
1da177e4 | 153 | |
e041c683 | 154 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 155 | |
888c848e | 156 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
157 | .forwarding = 0, |
158 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
159 | .mtu6 = IPV6_MIN_MTU, | |
160 | .accept_ra = 1, | |
161 | .accept_redirects = 1, | |
162 | .autoconf = 1, | |
163 | .force_mld_version = 0, | |
164 | .dad_transmits = 1, | |
165 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
166 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
167 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
168 | #ifdef CONFIG_IPV6_PRIVACY | |
169 | .use_tempaddr = 0, | |
170 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
171 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
172 | .regen_max_retry = REGEN_MAX_RETRY, | |
173 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
174 | #endif | |
175 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 176 | .accept_ra_defrtr = 1, |
c4fd30eb | 177 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
178 | #ifdef CONFIG_IPV6_ROUTER_PREF |
179 | .accept_ra_rtr_pref = 1, | |
52e16356 | 180 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
181 | #ifdef CONFIG_IPV6_ROUTE_INFO |
182 | .accept_ra_rt_info_max_plen = 0, | |
183 | #endif | |
930d6ff2 | 184 | #endif |
fbea49e1 | 185 | .proxy_ndp = 0, |
0bcbc926 | 186 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 187 | .disable_ipv6 = 0, |
1b34be74 | 188 | .accept_dad = 1, |
1da177e4 LT |
189 | }; |
190 | ||
ab32ea5d | 191 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
192 | .forwarding = 0, |
193 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
194 | .mtu6 = IPV6_MIN_MTU, | |
195 | .accept_ra = 1, | |
196 | .accept_redirects = 1, | |
197 | .autoconf = 1, | |
198 | .dad_transmits = 1, | |
199 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
200 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
201 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
202 | #ifdef CONFIG_IPV6_PRIVACY | |
203 | .use_tempaddr = 0, | |
204 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
205 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
206 | .regen_max_retry = REGEN_MAX_RETRY, | |
207 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
208 | #endif | |
209 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 210 | .accept_ra_defrtr = 1, |
c4fd30eb | 211 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
212 | #ifdef CONFIG_IPV6_ROUTER_PREF |
213 | .accept_ra_rtr_pref = 1, | |
52e16356 | 214 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
215 | #ifdef CONFIG_IPV6_ROUTE_INFO |
216 | .accept_ra_rt_info_max_plen = 0, | |
217 | #endif | |
930d6ff2 | 218 | #endif |
fbea49e1 | 219 | .proxy_ndp = 0, |
0bcbc926 | 220 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 221 | .disable_ipv6 = 0, |
1b34be74 | 222 | .accept_dad = 1, |
1da177e4 LT |
223 | }; |
224 | ||
225 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 226 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 227 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
228 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
229 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 230 | |
f24e3d65 | 231 | /* Check if a valid qdisc is available */ |
05297949 | 232 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 233 | { |
05297949 | 234 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
235 | } |
236 | ||
2b5ead46 YH |
237 | /* Check if a route is valid prefix route */ |
238 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
239 | { | |
240 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); | |
241 | } | |
242 | ||
1da177e4 LT |
243 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
244 | { | |
245 | if (del_timer(&ifp->timer)) | |
246 | __in6_ifa_put(ifp); | |
247 | } | |
248 | ||
249 | enum addrconf_timer_t | |
250 | { | |
251 | AC_NONE, | |
252 | AC_DAD, | |
253 | AC_RS, | |
254 | }; | |
255 | ||
256 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
257 | enum addrconf_timer_t what, | |
258 | unsigned long when) | |
259 | { | |
260 | if (!del_timer(&ifp->timer)) | |
261 | in6_ifa_hold(ifp); | |
262 | ||
263 | switch (what) { | |
264 | case AC_DAD: | |
265 | ifp->timer.function = addrconf_dad_timer; | |
266 | break; | |
267 | case AC_RS: | |
268 | ifp->timer.function = addrconf_rs_timer; | |
269 | break; | |
270 | default:; | |
271 | } | |
272 | ifp->timer.expires = jiffies + when; | |
273 | add_timer(&ifp->timer); | |
274 | } | |
275 | ||
7f7d9a6b HX |
276 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
277 | { | |
7f7d9a6b | 278 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 279 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
280 | goto err_ip; |
281 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 282 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 283 | goto err_icmp; |
14878f75 | 284 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 285 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 286 | goto err_icmpmsg; |
7f7d9a6b HX |
287 | |
288 | return 0; | |
289 | ||
14878f75 DS |
290 | err_icmpmsg: |
291 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
292 | err_icmp: |
293 | snmp_mib_free((void **)idev->stats.ipv6); | |
294 | err_ip: | |
aaf70ec7 | 295 | return -ENOMEM; |
7f7d9a6b HX |
296 | } |
297 | ||
16910b98 | 298 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 299 | { |
14878f75 | 300 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
301 | snmp_mib_free((void **)idev->stats.icmpv6); |
302 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
303 | } |
304 | ||
1da177e4 LT |
305 | /* Nobody refers to this device, we may destroy it. */ |
306 | ||
8814c4b5 YH |
307 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
308 | { | |
309 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
310 | kfree(idev); | |
311 | } | |
312 | ||
1da177e4 LT |
313 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
314 | { | |
315 | struct net_device *dev = idev->dev; | |
547b792c IJ |
316 | |
317 | WARN_ON(idev->addr_list != NULL); | |
318 | WARN_ON(idev->mc_list != NULL); | |
319 | ||
1da177e4 LT |
320 | #ifdef NET_REFCNT_DEBUG |
321 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
322 | #endif | |
323 | dev_put(dev); | |
324 | if (!idev->dead) { | |
325 | printk("Freeing alive inet6 device %p\n", idev); | |
326 | return; | |
327 | } | |
328 | snmp6_free_dev(idev); | |
8814c4b5 | 329 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
330 | } |
331 | ||
7159039a YH |
332 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
333 | ||
1da177e4 LT |
334 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
335 | { | |
336 | struct inet6_dev *ndev; | |
337 | ||
338 | ASSERT_RTNL(); | |
339 | ||
340 | if (dev->mtu < IPV6_MIN_MTU) | |
341 | return NULL; | |
342 | ||
1ab1457c | 343 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 344 | |
1ab1457c YH |
345 | if (ndev == NULL) |
346 | return NULL; | |
322f74a4 IO |
347 | |
348 | rwlock_init(&ndev->lock); | |
349 | ndev->dev = dev; | |
c346dca1 | 350 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
351 | ndev->cnf.mtu6 = dev->mtu; |
352 | ndev->cnf.sysctl = NULL; | |
353 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
354 | if (ndev->nd_parms == NULL) { | |
355 | kfree(ndev); | |
356 | return NULL; | |
357 | } | |
0187bdfb BH |
358 | if (ndev->cnf.forwarding) |
359 | dev_disable_lro(dev); | |
322f74a4 IO |
360 | /* We refer to the device */ |
361 | dev_hold(dev); | |
1da177e4 | 362 | |
322f74a4 IO |
363 | if (snmp6_alloc_dev(ndev) < 0) { |
364 | ADBG((KERN_WARNING | |
365 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 366 | __func__, dev->name)); |
322f74a4 IO |
367 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
368 | ndev->dead = 1; | |
369 | in6_dev_finish_destroy(ndev); | |
370 | return NULL; | |
371 | } | |
1da177e4 | 372 | |
322f74a4 IO |
373 | if (snmp6_register_dev(ndev) < 0) { |
374 | ADBG((KERN_WARNING | |
375 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 376 | __func__, dev->name)); |
322f74a4 IO |
377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
378 | ndev->dead = 1; | |
379 | in6_dev_finish_destroy(ndev); | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | /* One reference from device. We must do this before | |
384 | * we invoke __ipv6_regen_rndid(). | |
385 | */ | |
386 | in6_dev_hold(ndev); | |
1da177e4 | 387 | |
1b34be74 YH |
388 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
389 | ndev->cnf.accept_dad = -1; | |
390 | ||
b077d7ab YH |
391 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
392 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
393 | printk(KERN_INFO | |
394 | "%s: Disabled Multicast RS\n", | |
395 | dev->name); | |
396 | ndev->cnf.rtr_solicits = 0; | |
397 | } | |
398 | #endif | |
399 | ||
1da177e4 | 400 | #ifdef CONFIG_IPV6_PRIVACY |
b24b8a24 | 401 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
402 | if ((dev->flags&IFF_LOOPBACK) || |
403 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 404 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 405 | dev->type == ARPHRD_SIT || |
0be669bb | 406 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
407 | printk(KERN_INFO |
408 | "%s: Disabled Privacy Extensions\n", | |
409 | dev->name); | |
410 | ndev->cnf.use_tempaddr = -1; | |
411 | } else { | |
412 | in6_dev_hold(ndev); | |
413 | ipv6_regen_rndid((unsigned long) ndev); | |
414 | } | |
1da177e4 LT |
415 | #endif |
416 | ||
f24e3d65 | 417 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
418 | ndev->if_flags |= IF_READY; |
419 | ||
322f74a4 IO |
420 | ipv6_mc_init_dev(ndev); |
421 | ndev->tstamp = jiffies; | |
f52295a9 | 422 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
423 | /* protected by rtnl_lock */ |
424 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
425 | |
426 | /* Join all-node multicast group */ | |
f3ee4010 | 427 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 428 | |
1da177e4 LT |
429 | return ndev; |
430 | } | |
431 | ||
cee89473 | 432 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
433 | { |
434 | struct inet6_dev *idev; | |
435 | ||
436 | ASSERT_RTNL(); | |
437 | ||
438 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
439 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
440 | return NULL; | |
441 | } | |
c5e33bdd | 442 | |
1da177e4 LT |
443 | if (dev->flags&IFF_UP) |
444 | ipv6_mc_up(idev); | |
445 | return idev; | |
446 | } | |
447 | ||
448 | #ifdef CONFIG_SYSCTL | |
449 | static void dev_forward_change(struct inet6_dev *idev) | |
450 | { | |
451 | struct net_device *dev; | |
452 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
453 | |
454 | if (!idev) | |
455 | return; | |
456 | dev = idev->dev; | |
0187bdfb BH |
457 | if (idev->cnf.forwarding) |
458 | dev_disable_lro(dev); | |
1da177e4 | 459 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 460 | if (idev->cnf.forwarding) |
f3ee4010 | 461 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 462 | else |
f3ee4010 | 463 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 LT |
464 | } |
465 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
466 | if (ifa->flags&IFA_F_TENTATIVE) |
467 | continue; | |
1da177e4 LT |
468 | if (idev->cnf.forwarding) |
469 | addrconf_join_anycast(ifa); | |
470 | else | |
471 | addrconf_leave_anycast(ifa); | |
472 | } | |
473 | } | |
474 | ||
475 | ||
e186932b | 476 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
477 | { |
478 | struct net_device *dev; | |
479 | struct inet6_dev *idev; | |
480 | ||
481 | read_lock(&dev_base_lock); | |
bff16c2f | 482 | for_each_netdev(net, dev) { |
8814c4b5 | 483 | rcu_read_lock(); |
1da177e4 LT |
484 | idev = __in6_dev_get(dev); |
485 | if (idev) { | |
e186932b PE |
486 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
487 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
488 | if (changed) |
489 | dev_forward_change(idev); | |
490 | } | |
8814c4b5 | 491 | rcu_read_unlock(); |
1da177e4 LT |
492 | } |
493 | read_unlock(&dev_base_lock); | |
494 | } | |
c8fecf22 | 495 | |
b325fddb | 496 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf22 | 497 | { |
bff16c2f PE |
498 | struct net *net; |
499 | ||
500 | net = (struct net *)table->extra2; | |
441fc2a2 | 501 | if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb SH |
502 | return 0; |
503 | ||
504 | if (!rtnl_trylock()) | |
505 | return -ERESTARTSYS; | |
c8fecf22 | 506 | |
e186932b PE |
507 | if (p == &net->ipv6.devconf_all->forwarding) { |
508 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
509 | net->ipv6.devconf_dflt->forwarding = newf; | |
510 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
511 | } else if ((!*p) ^ (!old)) |
512 | dev_forward_change((struct inet6_dev *)table->extra1); | |
0187bdfb | 513 | rtnl_unlock(); |
c8fecf22 PE |
514 | |
515 | if (*p) | |
7b4da532 | 516 | rt6_purge_dflt_routers(net); |
b325fddb | 517 | return 1; |
c8fecf22 | 518 | } |
1da177e4 LT |
519 | #endif |
520 | ||
521 | /* Nobody refers to this ifaddr, destroy it */ | |
522 | ||
523 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
524 | { | |
547b792c IJ |
525 | WARN_ON(ifp->if_next != NULL); |
526 | WARN_ON(ifp->lst_next != NULL); | |
527 | ||
1da177e4 LT |
528 | #ifdef NET_REFCNT_DEBUG |
529 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
530 | #endif | |
531 | ||
532 | in6_dev_put(ifp->idev); | |
533 | ||
534 | if (del_timer(&ifp->timer)) | |
535 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
536 | ||
537 | if (!ifp->dead) { | |
538 | printk("Freeing alive inet6 address %p\n", ifp); | |
539 | return; | |
540 | } | |
541 | dst_release(&ifp->rt->u.dst); | |
542 | ||
543 | kfree(ifp); | |
544 | } | |
545 | ||
e55ffac6 BH |
546 | static void |
547 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
548 | { | |
549 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 550 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
551 | |
552 | /* | |
553 | * Each device address list is sorted in order of scope - | |
554 | * global before linklocal. | |
555 | */ | |
556 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
557 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 558 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
559 | break; |
560 | } | |
561 | ||
562 | ifp->if_next = *ifap; | |
563 | *ifap = ifp; | |
564 | } | |
565 | ||
3eb84f49 YH |
566 | /* |
567 | * Hash function taken from net_alias.c | |
568 | */ | |
569 | static u8 ipv6_addr_hash(const struct in6_addr *addr) | |
570 | { | |
571 | __u32 word; | |
572 | ||
573 | /* | |
574 | * We perform the hash function over the last 64 bits of the address | |
575 | * This will include the IEEE address token on links that support it. | |
576 | */ | |
577 | ||
578 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); | |
579 | word ^= (word >> 16); | |
580 | word ^= (word >> 8); | |
581 | ||
582 | return ((word ^ (word >> 4)) & 0x0f); | |
583 | } | |
584 | ||
1da177e4 LT |
585 | /* On success it returns ifp with increased reference count */ |
586 | ||
587 | static struct inet6_ifaddr * | |
588 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 589 | int scope, u32 flags) |
1da177e4 LT |
590 | { |
591 | struct inet6_ifaddr *ifa = NULL; | |
592 | struct rt6_info *rt; | |
593 | int hash; | |
594 | int err = 0; | |
d68b8270 YH |
595 | int addr_type = ipv6_addr_type(addr); |
596 | ||
597 | if (addr_type == IPV6_ADDR_ANY || | |
598 | addr_type & IPV6_ADDR_MULTICAST || | |
599 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
600 | addr_type & IPV6_ADDR_LOOPBACK)) | |
601 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 602 | |
8814c4b5 | 603 | rcu_read_lock_bh(); |
1da177e4 LT |
604 | if (idev->dead) { |
605 | err = -ENODEV; /*XXX*/ | |
606 | goto out2; | |
607 | } | |
608 | ||
609 | write_lock(&addrconf_hash_lock); | |
610 | ||
611 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 612 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
613 | ADBG(("ipv6_add_addr: already assigned\n")); |
614 | err = -EEXIST; | |
615 | goto out; | |
616 | } | |
617 | ||
322f74a4 | 618 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
619 | |
620 | if (ifa == NULL) { | |
621 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
622 | err = -ENOBUFS; | |
623 | goto out; | |
624 | } | |
625 | ||
626 | rt = addrconf_dst_alloc(idev, addr, 0); | |
627 | if (IS_ERR(rt)) { | |
628 | err = PTR_ERR(rt); | |
629 | goto out; | |
630 | } | |
631 | ||
1da177e4 LT |
632 | ipv6_addr_copy(&ifa->addr, addr); |
633 | ||
634 | spin_lock_init(&ifa->lock); | |
635 | init_timer(&ifa->timer); | |
636 | ifa->timer.data = (unsigned long) ifa; | |
637 | ifa->scope = scope; | |
638 | ifa->prefix_len = pfxlen; | |
639 | ifa->flags = flags | IFA_F_TENTATIVE; | |
640 | ifa->cstamp = ifa->tstamp = jiffies; | |
641 | ||
57f5f544 KF |
642 | ifa->rt = rt; |
643 | ||
95c385b4 NH |
644 | /* |
645 | * part one of RFC 4429, section 3.3 | |
646 | * We should not configure an address as | |
647 | * optimistic if we do not yet know the link | |
648 | * layer address of our nexhop router | |
649 | */ | |
650 | ||
651 | if (rt->rt6i_nexthop == NULL) | |
652 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
653 | ||
1da177e4 LT |
654 | ifa->idev = idev; |
655 | in6_dev_hold(idev); | |
656 | /* For caller */ | |
657 | in6_ifa_hold(ifa); | |
658 | ||
659 | /* Add to big hash table */ | |
660 | hash = ipv6_addr_hash(addr); | |
661 | ||
662 | ifa->lst_next = inet6_addr_lst[hash]; | |
663 | inet6_addr_lst[hash] = ifa; | |
664 | in6_ifa_hold(ifa); | |
665 | write_unlock(&addrconf_hash_lock); | |
666 | ||
667 | write_lock(&idev->lock); | |
668 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 669 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
670 | |
671 | #ifdef CONFIG_IPV6_PRIVACY | |
672 | if (ifa->flags&IFA_F_TEMPORARY) { | |
673 | ifa->tmp_next = idev->tempaddr_list; | |
674 | idev->tempaddr_list = ifa; | |
675 | in6_ifa_hold(ifa); | |
676 | } | |
677 | #endif | |
678 | ||
1da177e4 LT |
679 | in6_ifa_hold(ifa); |
680 | write_unlock(&idev->lock); | |
681 | out2: | |
8814c4b5 | 682 | rcu_read_unlock_bh(); |
1da177e4 | 683 | |
fd92833a | 684 | if (likely(err == 0)) |
e041c683 | 685 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
686 | else { |
687 | kfree(ifa); | |
688 | ifa = ERR_PTR(err); | |
689 | } | |
690 | ||
691 | return ifa; | |
692 | out: | |
693 | write_unlock(&addrconf_hash_lock); | |
694 | goto out2; | |
695 | } | |
696 | ||
697 | /* This function wants to get referenced ifp and releases it before return */ | |
698 | ||
699 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
700 | { | |
701 | struct inet6_ifaddr *ifa, **ifap; | |
702 | struct inet6_dev *idev = ifp->idev; | |
703 | int hash; | |
704 | int deleted = 0, onlink = 0; | |
705 | unsigned long expires = jiffies; | |
706 | ||
707 | hash = ipv6_addr_hash(&ifp->addr); | |
708 | ||
709 | ifp->dead = 1; | |
710 | ||
711 | write_lock_bh(&addrconf_hash_lock); | |
712 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
713 | ifap = &ifa->lst_next) { | |
714 | if (ifa == ifp) { | |
715 | *ifap = ifa->lst_next; | |
716 | __in6_ifa_put(ifp); | |
717 | ifa->lst_next = NULL; | |
718 | break; | |
719 | } | |
720 | } | |
721 | write_unlock_bh(&addrconf_hash_lock); | |
722 | ||
723 | write_lock_bh(&idev->lock); | |
724 | #ifdef CONFIG_IPV6_PRIVACY | |
725 | if (ifp->flags&IFA_F_TEMPORARY) { | |
726 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
727 | ifap = &ifa->tmp_next) { | |
728 | if (ifa == ifp) { | |
729 | *ifap = ifa->tmp_next; | |
730 | if (ifp->ifpub) { | |
731 | in6_ifa_put(ifp->ifpub); | |
732 | ifp->ifpub = NULL; | |
733 | } | |
734 | __in6_ifa_put(ifp); | |
735 | ifa->tmp_next = NULL; | |
736 | break; | |
737 | } | |
738 | } | |
739 | } | |
740 | #endif | |
741 | ||
1d142804 | 742 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
743 | if (ifa == ifp) { |
744 | *ifap = ifa->if_next; | |
745 | __in6_ifa_put(ifp); | |
746 | ifa->if_next = NULL; | |
747 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
748 | break; | |
749 | deleted = 1; | |
1d142804 | 750 | continue; |
1da177e4 LT |
751 | } else if (ifp->flags & IFA_F_PERMANENT) { |
752 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
753 | ifp->prefix_len)) { | |
754 | if (ifa->flags & IFA_F_PERMANENT) { | |
755 | onlink = 1; | |
756 | if (deleted) | |
757 | break; | |
758 | } else { | |
759 | unsigned long lifetime; | |
760 | ||
761 | if (!onlink) | |
762 | onlink = -1; | |
763 | ||
764 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
765 | |
766 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
767 | /* | |
768 | * Note: Because this address is | |
769 | * not permanent, lifetime < | |
770 | * LONG_MAX / HZ here. | |
771 | */ | |
1da177e4 LT |
772 | if (time_before(expires, |
773 | ifa->tstamp + lifetime * HZ)) | |
774 | expires = ifa->tstamp + lifetime * HZ; | |
775 | spin_unlock(&ifa->lock); | |
776 | } | |
777 | } | |
778 | } | |
1d142804 | 779 | ifap = &ifa->if_next; |
1da177e4 LT |
780 | } |
781 | write_unlock_bh(&idev->lock); | |
782 | ||
b2238566 AV |
783 | addrconf_del_timer(ifp); |
784 | ||
1da177e4 LT |
785 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
786 | ||
e041c683 | 787 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 788 | |
1da177e4 LT |
789 | /* |
790 | * Purge or update corresponding prefix | |
791 | * | |
792 | * 1) we don't purge prefix here if address was not permanent. | |
793 | * prefix is managed by its own lifetime. | |
794 | * 2) if there're no addresses, delete prefix. | |
795 | * 3) if there're still other permanent address(es), | |
796 | * corresponding prefix is still permanent. | |
797 | * 4) otherwise, update prefix lifetime to the | |
798 | * longest valid lifetime among the corresponding | |
799 | * addresses on the device. | |
800 | * Note: subsequent RA will update lifetime. | |
801 | * | |
802 | * --yoshfuji | |
803 | */ | |
804 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
805 | struct in6_addr prefix; | |
806 | struct rt6_info *rt; | |
c346dca1 | 807 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 808 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 809 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 810 | |
2b5ead46 | 811 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 812 | if (onlink == 0) { |
e0a1ad73 | 813 | ip6_del_rt(rt); |
1da177e4 LT |
814 | rt = NULL; |
815 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
816 | rt->rt6i_expires = expires; | |
817 | rt->rt6i_flags |= RTF_EXPIRES; | |
818 | } | |
819 | } | |
820 | dst_release(&rt->u.dst); | |
821 | } | |
822 | ||
823 | in6_ifa_put(ifp); | |
824 | } | |
825 | ||
826 | #ifdef CONFIG_IPV6_PRIVACY | |
827 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
828 | { | |
829 | struct inet6_dev *idev = ifp->idev; | |
830 | struct in6_addr addr, *tmpaddr; | |
831 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 832 | unsigned long regen_advance; |
1da177e4 LT |
833 | int tmp_plen; |
834 | int ret = 0; | |
835 | int max_addresses; | |
95c385b4 | 836 | u32 addr_flags; |
1da177e4 LT |
837 | |
838 | write_lock(&idev->lock); | |
839 | if (ift) { | |
840 | spin_lock_bh(&ift->lock); | |
841 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
842 | spin_unlock_bh(&ift->lock); | |
843 | tmpaddr = &addr; | |
844 | } else { | |
845 | tmpaddr = NULL; | |
846 | } | |
847 | retry: | |
848 | in6_dev_hold(idev); | |
849 | if (idev->cnf.use_tempaddr <= 0) { | |
850 | write_unlock(&idev->lock); | |
851 | printk(KERN_INFO | |
852 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
853 | in6_dev_put(idev); | |
854 | ret = -1; | |
855 | goto out; | |
856 | } | |
857 | spin_lock_bh(&ifp->lock); | |
858 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
859 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
860 | spin_unlock_bh(&ifp->lock); | |
861 | write_unlock(&idev->lock); | |
862 | printk(KERN_WARNING | |
863 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
864 | in6_dev_put(idev); | |
865 | ret = -1; | |
866 | goto out; | |
867 | } | |
868 | in6_ifa_hold(ifp); | |
869 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
870 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
871 | spin_unlock_bh(&ifp->lock); | |
872 | write_unlock(&idev->lock); | |
873 | printk(KERN_WARNING | |
874 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
875 | in6_ifa_put(ifp); | |
876 | in6_dev_put(idev); | |
877 | ret = -1; | |
878 | goto out; | |
879 | } | |
880 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
881 | tmp_valid_lft = min_t(__u32, | |
882 | ifp->valid_lft, | |
883 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
884 | tmp_prefered_lft = min_t(__u32, |
885 | ifp->prefered_lft, | |
1da177e4 LT |
886 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
887 | tmp_plen = ifp->prefix_len; | |
888 | max_addresses = idev->cnf.max_addresses; | |
889 | tmp_cstamp = ifp->cstamp; | |
890 | tmp_tstamp = ifp->tstamp; | |
891 | spin_unlock_bh(&ifp->lock); | |
892 | ||
eac55bf9 BB |
893 | regen_advance = idev->cnf.regen_max_retry * |
894 | idev->cnf.dad_transmits * | |
895 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 896 | write_unlock(&idev->lock); |
95c385b4 | 897 | |
eac55bf9 BB |
898 | /* A temporary address is created only if this calculated Preferred |
899 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
900 | * an implementation must not create a temporary address with a zero | |
901 | * Preferred Lifetime. | |
902 | */ | |
903 | if (tmp_prefered_lft <= regen_advance) { | |
904 | in6_ifa_put(ifp); | |
905 | in6_dev_put(idev); | |
906 | ret = -1; | |
907 | goto out; | |
908 | } | |
909 | ||
95c385b4 NH |
910 | addr_flags = IFA_F_TEMPORARY; |
911 | /* set in addrconf_prefix_rcv() */ | |
912 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
913 | addr_flags |= IFA_F_OPTIMISTIC; | |
914 | ||
1da177e4 | 915 | ift = !max_addresses || |
1ab1457c | 916 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 917 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
918 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
919 | addr_flags) : NULL; | |
1da177e4 LT |
920 | if (!ift || IS_ERR(ift)) { |
921 | in6_ifa_put(ifp); | |
922 | in6_dev_put(idev); | |
923 | printk(KERN_INFO | |
924 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
925 | tmpaddr = &addr; | |
926 | write_lock(&idev->lock); | |
927 | goto retry; | |
928 | } | |
929 | ||
930 | spin_lock_bh(&ift->lock); | |
931 | ift->ifpub = ifp; | |
932 | ift->valid_lft = tmp_valid_lft; | |
933 | ift->prefered_lft = tmp_prefered_lft; | |
934 | ift->cstamp = tmp_cstamp; | |
935 | ift->tstamp = tmp_tstamp; | |
936 | spin_unlock_bh(&ift->lock); | |
937 | ||
938 | addrconf_dad_start(ift, 0); | |
939 | in6_ifa_put(ift); | |
940 | in6_dev_put(idev); | |
941 | out: | |
942 | return ret; | |
943 | } | |
944 | #endif | |
945 | ||
946 | /* | |
072047e4 | 947 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 948 | */ |
a9b05723 YH |
949 | enum { |
950 | IPV6_SADDR_RULE_INIT = 0, | |
951 | IPV6_SADDR_RULE_LOCAL, | |
952 | IPV6_SADDR_RULE_SCOPE, | |
953 | IPV6_SADDR_RULE_PREFERRED, | |
954 | #ifdef CONFIG_IPV6_MIP6 | |
955 | IPV6_SADDR_RULE_HOA, | |
956 | #endif | |
957 | IPV6_SADDR_RULE_OIF, | |
958 | IPV6_SADDR_RULE_LABEL, | |
959 | #ifdef CONFIG_IPV6_PRIVACY | |
960 | IPV6_SADDR_RULE_PRIVACY, | |
961 | #endif | |
962 | IPV6_SADDR_RULE_ORCHID, | |
963 | IPV6_SADDR_RULE_PREFIX, | |
964 | IPV6_SADDR_RULE_MAX | |
965 | }; | |
966 | ||
072047e4 | 967 | struct ipv6_saddr_score { |
a9b05723 YH |
968 | int rule; |
969 | int addr_type; | |
970 | struct inet6_ifaddr *ifa; | |
971 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
972 | int scopedist; | |
973 | int matchlen; | |
072047e4 YH |
974 | }; |
975 | ||
a9b05723 | 976 | struct ipv6_saddr_dst { |
9acd9f3a | 977 | const struct in6_addr *addr; |
a9b05723 YH |
978 | int ifindex; |
979 | int scope; | |
980 | int label; | |
7cbca67c | 981 | unsigned int prefs; |
a9b05723 | 982 | }; |
072047e4 | 983 | |
b6f99a21 | 984 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 985 | { |
072047e4 YH |
986 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
987 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
988 | return 1; | |
989 | return 0; | |
1da177e4 LT |
990 | } |
991 | ||
3de23255 BT |
992 | static int ipv6_get_saddr_eval(struct net *net, |
993 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
994 | struct ipv6_saddr_dst *dst, |
995 | int i) | |
996 | { | |
997 | int ret; | |
998 | ||
999 | if (i <= score->rule) { | |
1000 | switch (i) { | |
1001 | case IPV6_SADDR_RULE_SCOPE: | |
1002 | ret = score->scopedist; | |
1003 | break; | |
1004 | case IPV6_SADDR_RULE_PREFIX: | |
1005 | ret = score->matchlen; | |
1006 | break; | |
1007 | default: | |
1008 | ret = !!test_bit(i, score->scorebits); | |
1009 | } | |
1010 | goto out; | |
1011 | } | |
1012 | ||
1013 | switch (i) { | |
1014 | case IPV6_SADDR_RULE_INIT: | |
1015 | /* Rule 0: remember if hiscore is not ready yet */ | |
1016 | ret = !!score->ifa; | |
1017 | break; | |
1018 | case IPV6_SADDR_RULE_LOCAL: | |
1019 | /* Rule 1: Prefer same address */ | |
1020 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1021 | break; | |
1022 | case IPV6_SADDR_RULE_SCOPE: | |
1023 | /* Rule 2: Prefer appropriate scope | |
1024 | * | |
1025 | * ret | |
1026 | * ^ | |
1027 | * -1 | d 15 | |
1028 | * ---+--+-+---> scope | |
1029 | * | | |
1030 | * | d is scope of the destination. | |
1031 | * B-d | \ | |
1032 | * | \ <- smaller scope is better if | |
1033 | * B-15 | \ if scope is enough for destinaion. | |
1034 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1035 | * d-C-1 | / | |
1036 | * |/ <- greater is better | |
1037 | * -C / if scope is not enough for destination. | |
1038 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1039 | * | |
1040 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1041 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1042 | * Assume B = 0 and we get C > 29. | |
1043 | */ | |
1044 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1045 | if (ret >= dst->scope) | |
1046 | ret = -ret; | |
1047 | else | |
1048 | ret -= 128; /* 30 is enough */ | |
1049 | score->scopedist = ret; | |
1050 | break; | |
1051 | case IPV6_SADDR_RULE_PREFERRED: | |
1052 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1053 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1054 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1055 | break; | |
1056 | #ifdef CONFIG_IPV6_MIP6 | |
1057 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1058 | { |
a9b05723 | 1059 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1060 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1061 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1062 | break; |
7cbca67c | 1063 | } |
a9b05723 YH |
1064 | #endif |
1065 | case IPV6_SADDR_RULE_OIF: | |
1066 | /* Rule 5: Prefer outgoing interface */ | |
1067 | ret = (!dst->ifindex || | |
1068 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1069 | break; | |
1070 | case IPV6_SADDR_RULE_LABEL: | |
1071 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1072 | ret = ipv6_addr_label(net, |
1073 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1074 | score->ifa->idev->dev->ifindex) == dst->label; |
1075 | break; | |
1076 | #ifdef CONFIG_IPV6_PRIVACY | |
1077 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1078 | { |
a9b05723 YH |
1079 | /* Rule 7: Prefer public address |
1080 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1081 | */ | |
7cbca67c YH |
1082 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1083 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1084 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1085 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1086 | break; |
7cbca67c | 1087 | } |
a9b05723 YH |
1088 | #endif |
1089 | case IPV6_SADDR_RULE_ORCHID: | |
1090 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1091 | * non-ORCHID vs non-ORCHID | |
1092 | */ | |
1093 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1094 | ipv6_addr_orchid(dst->addr)); | |
1095 | break; | |
1096 | case IPV6_SADDR_RULE_PREFIX: | |
1097 | /* Rule 8: Use longest matching prefix */ | |
1098 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1099 | dst->addr); | |
1100 | break; | |
1101 | default: | |
1102 | ret = 0; | |
1103 | } | |
1104 | ||
1105 | if (ret) | |
1106 | __set_bit(i, score->scorebits); | |
1107 | score->rule = i; | |
1108 | out: | |
1109 | return ret; | |
1110 | } | |
1111 | ||
191cd582 | 1112 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1113 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1114 | struct in6_addr *saddr) |
1da177e4 | 1115 | { |
a9b05723 YH |
1116 | struct ipv6_saddr_score scores[2], |
1117 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1118 | struct ipv6_saddr_dst dst; |
072047e4 | 1119 | struct net_device *dev; |
a9b05723 | 1120 | int dst_type; |
1da177e4 | 1121 | |
a9b05723 YH |
1122 | dst_type = __ipv6_addr_type(daddr); |
1123 | dst.addr = daddr; | |
1124 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1125 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1126 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1127 | dst.prefs = prefs; |
a9b05723 YH |
1128 | |
1129 | hiscore->rule = -1; | |
1130 | hiscore->ifa = NULL; | |
1da177e4 | 1131 | |
072047e4 | 1132 | read_lock(&dev_base_lock); |
8814c4b5 | 1133 | rcu_read_lock(); |
1da177e4 | 1134 | |
6fda7350 | 1135 | for_each_netdev(net, dev) { |
072047e4 | 1136 | struct inet6_dev *idev; |
072047e4 | 1137 | |
a9b05723 | 1138 | /* Candidate Source Address (section 4) |
072047e4 YH |
1139 | * - multicast and link-local destination address, |
1140 | * the set of candidate source address MUST only | |
1141 | * include addresses assigned to interfaces | |
1142 | * belonging to the same link as the outgoing | |
1143 | * interface. | |
1144 | * (- For site-local destination addresses, the | |
1145 | * set of candidate source addresses MUST only | |
1146 | * include addresses assigned to interfaces | |
1147 | * belonging to the same site as the outgoing | |
1148 | * interface.) | |
1149 | */ | |
a9b05723 YH |
1150 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1151 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1152 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1153 | continue; |
1da177e4 | 1154 | |
1da177e4 | 1155 | idev = __in6_dev_get(dev); |
072047e4 YH |
1156 | if (!idev) |
1157 | continue; | |
1158 | ||
1159 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1160 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1161 | int i; | |
072047e4 | 1162 | |
a9b05723 | 1163 | /* |
6b3ae80a YH |
1164 | * - Tentative Address (RFC2462 section 5.4) |
1165 | * - A tentative address is not considered | |
1166 | * "assigned to an interface" in the traditional | |
95c385b4 | 1167 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1168 | * - Candidate Source Address (section 4) |
072047e4 YH |
1169 | * - In any case, anycast addresses, multicast |
1170 | * addresses, and the unspecified address MUST | |
1171 | * NOT be included in a candidate set. | |
1172 | */ | |
a9b05723 YH |
1173 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1174 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1175 | continue; |
a9b05723 YH |
1176 | |
1177 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1178 | ||
1179 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1180 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1181 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1182 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1183 | "assigned as unicast address on %s", |
1184 | dev->name); | |
1185 | continue; | |
1186 | } | |
1187 | ||
a9b05723 YH |
1188 | score->rule = -1; |
1189 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1190 | ||
1191 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1192 | int minihiscore, miniscore; | |
1193 | ||
3de23255 BT |
1194 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1195 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1196 | |
1197 | if (minihiscore > miniscore) { | |
1198 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1199 | score->scopedist > 0) { | |
1200 | /* | |
1201 | * special case: | |
1202 | * each remaining entry | |
1203 | * has too small (not enough) | |
1204 | * scope, because ifa entries | |
1205 | * are sorted by their scope | |
1206 | * values. | |
1207 | */ | |
1208 | goto try_nextdev; | |
1209 | } | |
1210 | break; | |
1211 | } else if (minihiscore < miniscore) { | |
1212 | struct ipv6_saddr_score *tmp; | |
1213 | ||
1214 | if (hiscore->ifa) | |
1215 | in6_ifa_put(hiscore->ifa); | |
1216 | ||
1217 | in6_ifa_hold(score->ifa); | |
1218 | ||
1219 | tmp = hiscore; | |
1220 | hiscore = score; | |
1221 | score = tmp; | |
1222 | ||
1223 | /* restore our iterator */ | |
1224 | score->ifa = hiscore->ifa; | |
1225 | ||
1226 | break; | |
1da177e4 | 1227 | } |
072047e4 | 1228 | } |
1da177e4 | 1229 | } |
a9b05723 | 1230 | try_nextdev: |
072047e4 | 1231 | read_unlock_bh(&idev->lock); |
1da177e4 | 1232 | } |
8814c4b5 | 1233 | rcu_read_unlock(); |
1da177e4 LT |
1234 | read_unlock(&dev_base_lock); |
1235 | ||
a9b05723 | 1236 | if (!hiscore->ifa) |
072047e4 | 1237 | return -EADDRNOTAVAIL; |
1ab1457c | 1238 | |
a9b05723 YH |
1239 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1240 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1241 | return 0; |
1da177e4 LT |
1242 | } |
1243 | ||
5e5f3f0f | 1244 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1245 | |
95c385b4 NH |
1246 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1247 | unsigned char banned_flags) | |
1da177e4 LT |
1248 | { |
1249 | struct inet6_dev *idev; | |
1250 | int err = -EADDRNOTAVAIL; | |
1251 | ||
8814c4b5 | 1252 | rcu_read_lock(); |
1da177e4 LT |
1253 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1254 | struct inet6_ifaddr *ifp; | |
1255 | ||
1256 | read_lock_bh(&idev->lock); | |
1257 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1258 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1259 | ipv6_addr_copy(addr, &ifp->addr); |
1260 | err = 0; | |
1261 | break; | |
1262 | } | |
1263 | } | |
1264 | read_unlock_bh(&idev->lock); | |
1265 | } | |
8814c4b5 | 1266 | rcu_read_unlock(); |
1da177e4 LT |
1267 | return err; |
1268 | } | |
1269 | ||
1270 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1271 | { | |
1272 | int cnt = 0; | |
1273 | struct inet6_ifaddr *ifp; | |
1274 | ||
1275 | read_lock_bh(&idev->lock); | |
1276 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1277 | cnt++; | |
1278 | read_unlock_bh(&idev->lock); | |
1279 | return cnt; | |
1280 | } | |
1281 | ||
bfeade08 DL |
1282 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1283 | struct net_device *dev, int strict) | |
1da177e4 LT |
1284 | { |
1285 | struct inet6_ifaddr * ifp; | |
1286 | u8 hash = ipv6_addr_hash(addr); | |
1287 | ||
1288 | read_lock_bh(&addrconf_hash_lock); | |
1289 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1290 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1291 | continue; |
1da177e4 LT |
1292 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1293 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1294 | if (dev == NULL || ifp->idev->dev == dev || | |
1295 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1296 | break; | |
1297 | } | |
1298 | } | |
1299 | read_unlock_bh(&addrconf_hash_lock); | |
1300 | return ifp != NULL; | |
1301 | } | |
7159039a YH |
1302 | EXPORT_SYMBOL(ipv6_chk_addr); |
1303 | ||
1da177e4 | 1304 | static |
06bfe655 DL |
1305 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1306 | struct net_device *dev) | |
1da177e4 LT |
1307 | { |
1308 | struct inet6_ifaddr * ifp; | |
1309 | u8 hash = ipv6_addr_hash(addr); | |
1310 | ||
1311 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1312 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1313 | continue; |
1da177e4 LT |
1314 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1315 | if (dev == NULL || ifp->idev->dev == dev) | |
1316 | break; | |
1317 | } | |
1318 | } | |
1319 | return ifp != NULL; | |
1320 | } | |
1321 | ||
52eeeb84 YH |
1322 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1323 | { | |
1324 | struct inet6_dev *idev; | |
1325 | struct inet6_ifaddr *ifa; | |
1326 | int onlink; | |
1327 | ||
1328 | onlink = 0; | |
1329 | rcu_read_lock(); | |
1330 | idev = __in6_dev_get(dev); | |
1331 | if (idev) { | |
1332 | read_lock_bh(&idev->lock); | |
1333 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
1334 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
1335 | ifa->prefix_len); | |
1336 | if (onlink) | |
1337 | break; | |
1338 | } | |
1339 | read_unlock_bh(&idev->lock); | |
1340 | } | |
1341 | rcu_read_unlock(); | |
1342 | return onlink; | |
1343 | } | |
1344 | ||
1345 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1346 | ||
9acd9f3a | 1347 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1348 | struct net_device *dev, int strict) |
1da177e4 LT |
1349 | { |
1350 | struct inet6_ifaddr * ifp; | |
1351 | u8 hash = ipv6_addr_hash(addr); | |
1352 | ||
1353 | read_lock_bh(&addrconf_hash_lock); | |
1354 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1355 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1356 | continue; |
1da177e4 LT |
1357 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1358 | if (dev == NULL || ifp->idev->dev == dev || | |
1359 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1360 | in6_ifa_hold(ifp); | |
1361 | break; | |
1362 | } | |
1363 | } | |
1364 | } | |
1365 | read_unlock_bh(&addrconf_hash_lock); | |
1366 | ||
1367 | return ifp; | |
1368 | } | |
1369 | ||
1370 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1371 | { | |
1372 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1373 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1374 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1375 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1376 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1377 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1378 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1379 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1380 | ||
1381 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1382 | return 1; | |
1383 | ||
1384 | if (addr_type2 == IPV6_ADDR_ANY && | |
1385 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1386 | return 1; | |
1387 | ||
1388 | if (addr_type == IPV6_ADDR_ANY && | |
1389 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1390 | return 1; | |
1391 | ||
1392 | if (sk2_rcv_saddr6 && | |
1393 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1394 | return 1; | |
1395 | ||
1396 | if (addr_type == IPV6_ADDR_MAPPED && | |
1397 | !sk2_ipv6only && | |
1398 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1399 | return 1; | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | /* Gets referenced address, destroys ifaddr */ | |
1405 | ||
9f5336e2 | 1406 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1407 | { |
1da177e4 LT |
1408 | if (ifp->flags&IFA_F_PERMANENT) { |
1409 | spin_lock_bh(&ifp->lock); | |
1410 | addrconf_del_timer(ifp); | |
1411 | ifp->flags |= IFA_F_TENTATIVE; | |
1412 | spin_unlock_bh(&ifp->lock); | |
1413 | in6_ifa_put(ifp); | |
1414 | #ifdef CONFIG_IPV6_PRIVACY | |
1415 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1416 | struct inet6_ifaddr *ifpub; | |
1417 | spin_lock_bh(&ifp->lock); | |
1418 | ifpub = ifp->ifpub; | |
1419 | if (ifpub) { | |
1420 | in6_ifa_hold(ifpub); | |
1421 | spin_unlock_bh(&ifp->lock); | |
1422 | ipv6_create_tempaddr(ifpub, ifp); | |
1423 | in6_ifa_put(ifpub); | |
1424 | } else { | |
1425 | spin_unlock_bh(&ifp->lock); | |
1426 | } | |
1427 | ipv6_del_addr(ifp); | |
1428 | #endif | |
1429 | } else | |
1430 | ipv6_del_addr(ifp); | |
1431 | } | |
1432 | ||
3c21edbd YH |
1433 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1434 | { | |
1b34be74 YH |
1435 | struct inet6_dev *idev = ifp->idev; |
1436 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { | |
1437 | struct in6_addr addr; | |
1438 | ||
1439 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1440 | addr.s6_addr32[1] = 0; | |
1441 | ||
1442 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1443 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1444 | /* DAD failed for link-local based on MAC address */ | |
1445 | idev->cnf.disable_ipv6 = 1; | |
1446 | } | |
1447 | } | |
1448 | ||
3c21edbd YH |
1449 | if (net_ratelimit()) |
1450 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1451 | addrconf_dad_stop(ifp); | |
1452 | } | |
1da177e4 LT |
1453 | |
1454 | /* Join to solicited addr multicast group. */ | |
1455 | ||
1456 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1457 | { | |
1458 | struct in6_addr maddr; | |
1459 | ||
1460 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1461 | return; | |
1462 | ||
1463 | addrconf_addr_solict_mult(addr, &maddr); | |
1464 | ipv6_dev_mc_inc(dev, &maddr); | |
1465 | } | |
1466 | ||
1467 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1468 | { | |
1469 | struct in6_addr maddr; | |
1470 | ||
1471 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1472 | return; | |
1473 | ||
1474 | addrconf_addr_solict_mult(addr, &maddr); | |
1475 | __ipv6_dev_mc_dec(idev, &maddr); | |
1476 | } | |
1477 | ||
20380731 | 1478 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1479 | { |
1480 | struct in6_addr addr; | |
1481 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1482 | if (ipv6_addr_any(&addr)) | |
1483 | return; | |
1484 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1485 | } | |
1486 | ||
20380731 | 1487 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1488 | { |
1489 | struct in6_addr addr; | |
1490 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1491 | if (ipv6_addr_any(&addr)) | |
1492 | return; | |
1493 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1494 | } | |
1495 | ||
073a8e0e YH |
1496 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1497 | { | |
1498 | if (dev->addr_len != ETH_ALEN) | |
1499 | return -1; | |
1500 | memcpy(eui, dev->dev_addr, 3); | |
1501 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1502 | ||
1503 | /* | |
1504 | * The zSeries OSA network cards can be shared among various | |
1505 | * OS instances, but the OSA cards have only one MAC address. | |
1506 | * This leads to duplicate address conflicts in conjunction | |
1507 | * with IPv6 if more than one instance uses the same card. | |
1508 | * | |
1509 | * The driver for these cards can deliver a unique 16-bit | |
1510 | * identifier for each instance sharing the same card. It is | |
1511 | * placed instead of 0xFFFE in the interface identifier. The | |
1512 | * "u" bit of the interface identifier is not inverted in this | |
1513 | * case. Hence the resulting interface identifier has local | |
1514 | * scope according to RFC2373. | |
1515 | */ | |
1516 | if (dev->dev_id) { | |
1517 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1518 | eui[4] = dev->dev_id & 0xFF; | |
1519 | } else { | |
1520 | eui[3] = 0xFF; | |
1521 | eui[4] = 0xFE; | |
1522 | eui[0] ^= 2; | |
1523 | } | |
1524 | return 0; | |
1525 | } | |
1526 | ||
1527 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1528 | { | |
1529 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1530 | if (dev->addr_len != ARCNET_ALEN) | |
1531 | return -1; | |
1532 | memset(eui, 0, 7); | |
1533 | eui[7] = *(u8*)dev->dev_addr; | |
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1538 | { | |
1539 | if (dev->addr_len != INFINIBAND_ALEN) | |
1540 | return -1; | |
1541 | memcpy(eui, dev->dev_addr + 12, 8); | |
1542 | eui[0] |= 2; | |
1543 | return 0; | |
1544 | } | |
1545 | ||
dfd982ba YH |
1546 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1547 | { | |
1548 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || | |
1549 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1550 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1551 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1552 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1553 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1554 | eui[1] = 0; | |
1555 | eui[2] = 0x5E; | |
1556 | eui[3] = 0xFE; | |
1557 | memcpy(eui + 4, &addr, 4); | |
1558 | return 0; | |
1559 | } | |
1560 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1561 | ||
1562 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1563 | { | |
1564 | if (dev->priv_flags & IFF_ISATAP) | |
1565 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1566 | return -1; | |
1567 | } | |
1568 | ||
1da177e4 LT |
1569 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1570 | { | |
1571 | switch (dev->type) { | |
1572 | case ARPHRD_ETHER: | |
1573 | case ARPHRD_FDDI: | |
1574 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1575 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1576 | case ARPHRD_ARCNET: |
073a8e0e | 1577 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1578 | case ARPHRD_INFINIBAND: |
073a8e0e | 1579 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1580 | case ARPHRD_SIT: |
dfd982ba | 1581 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1582 | } |
1583 | return -1; | |
1584 | } | |
1585 | ||
1586 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1587 | { | |
1588 | int err = -1; | |
1589 | struct inet6_ifaddr *ifp; | |
1590 | ||
1591 | read_lock_bh(&idev->lock); | |
1592 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1593 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1594 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1595 | err = 0; | |
1596 | break; | |
1597 | } | |
1598 | } | |
1599 | read_unlock_bh(&idev->lock); | |
1600 | return err; | |
1601 | } | |
1602 | ||
1603 | #ifdef CONFIG_IPV6_PRIVACY | |
1604 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1605 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1606 | { | |
1da177e4 | 1607 | regen: |
955189ef | 1608 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1609 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1610 | |
1611 | /* | |
1612 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1613 | * check if generated address is not inappropriate | |
1614 | * | |
1615 | * - Reserved subnet anycast (RFC 2526) | |
1616 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1617 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1618 | * 00-00-5E-FE-xx-xx-xx-xx |
1619 | * - value 0 | |
1620 | * - XXX: already assigned to an address on the device | |
1621 | */ | |
1ab1457c | 1622 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1623 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1624 | (idev->rndid[7]&0x80)) | |
1625 | goto regen; | |
1626 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1627 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1628 | goto regen; | |
1629 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1630 | goto regen; | |
1631 | } | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static void ipv6_regen_rndid(unsigned long data) | |
1637 | { | |
1638 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1639 | unsigned long expires; | |
1640 | ||
8814c4b5 | 1641 | rcu_read_lock_bh(); |
1da177e4 LT |
1642 | write_lock_bh(&idev->lock); |
1643 | ||
1644 | if (idev->dead) | |
1645 | goto out; | |
1646 | ||
1647 | if (__ipv6_regen_rndid(idev) < 0) | |
1648 | goto out; | |
1ab1457c | 1649 | |
1da177e4 | 1650 | expires = jiffies + |
1ab1457c | 1651 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1652 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1653 | if (time_before(expires, jiffies)) { | |
1654 | printk(KERN_WARNING | |
1655 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1656 | idev->dev->name); | |
1657 | goto out; | |
1658 | } | |
1659 | ||
1660 | if (!mod_timer(&idev->regen_timer, expires)) | |
1661 | in6_dev_hold(idev); | |
1662 | ||
1663 | out: | |
1664 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1665 | rcu_read_unlock_bh(); |
1da177e4 LT |
1666 | in6_dev_put(idev); |
1667 | } | |
1668 | ||
1669 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1670 | int ret = 0; | |
1671 | ||
1672 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1673 | ret = __ipv6_regen_rndid(idev); | |
1674 | return ret; | |
1675 | } | |
1676 | #endif | |
1677 | ||
1678 | /* | |
1679 | * Add prefix route. | |
1680 | */ | |
1681 | ||
1682 | static void | |
1683 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1684 | unsigned long expires, u32 flags) |
1da177e4 | 1685 | { |
86872cb5 TG |
1686 | struct fib6_config cfg = { |
1687 | .fc_table = RT6_TABLE_PREFIX, | |
1688 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1689 | .fc_ifindex = dev->ifindex, | |
1690 | .fc_expires = expires, | |
1691 | .fc_dst_len = plen, | |
1692 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1693 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1694 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1695 | }; |
1da177e4 | 1696 | |
86872cb5 | 1697 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1698 | |
1699 | /* Prevent useless cloning on PtP SIT. | |
1700 | This thing is done here expecting that the whole | |
1701 | class of non-broadcast devices need not cloning. | |
1702 | */ | |
0be669bb | 1703 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1704 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1705 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1706 | #endif |
1da177e4 | 1707 | |
86872cb5 | 1708 | ip6_route_add(&cfg); |
1da177e4 LT |
1709 | } |
1710 | ||
1711 | /* Create "default" multicast route to the interface */ | |
1712 | ||
1713 | static void addrconf_add_mroute(struct net_device *dev) | |
1714 | { | |
86872cb5 TG |
1715 | struct fib6_config cfg = { |
1716 | .fc_table = RT6_TABLE_LOCAL, | |
1717 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1718 | .fc_ifindex = dev->ifindex, | |
1719 | .fc_dst_len = 8, | |
1720 | .fc_flags = RTF_UP, | |
c346dca1 | 1721 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1722 | }; |
1723 | ||
1724 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1725 | ||
1726 | ip6_route_add(&cfg); | |
1da177e4 LT |
1727 | } |
1728 | ||
0be669bb | 1729 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1730 | static void sit_route_add(struct net_device *dev) |
1731 | { | |
86872cb5 TG |
1732 | struct fib6_config cfg = { |
1733 | .fc_table = RT6_TABLE_MAIN, | |
1734 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1735 | .fc_ifindex = dev->ifindex, | |
1736 | .fc_dst_len = 96, | |
1737 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1738 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1739 | }; |
1da177e4 LT |
1740 | |
1741 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1742 | ip6_route_add(&cfg); |
1da177e4 | 1743 | } |
0be669bb | 1744 | #endif |
1da177e4 LT |
1745 | |
1746 | static void addrconf_add_lroute(struct net_device *dev) | |
1747 | { | |
1748 | struct in6_addr addr; | |
1749 | ||
1750 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1751 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1752 | } | |
1753 | ||
1754 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1755 | { | |
1756 | struct inet6_dev *idev; | |
1757 | ||
1758 | ASSERT_RTNL(); | |
1759 | ||
1760 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1761 | return NULL; | |
1762 | ||
1763 | /* Add default multicast route */ | |
1764 | addrconf_add_mroute(dev); | |
1765 | ||
1766 | /* Add link local route */ | |
1767 | addrconf_add_lroute(dev); | |
1768 | return idev; | |
1769 | } | |
1770 | ||
1771 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1772 | { | |
1773 | struct prefix_info *pinfo; | |
1774 | __u32 valid_lft; | |
1775 | __u32 prefered_lft; | |
1776 | int addr_type; | |
1da177e4 LT |
1777 | struct inet6_dev *in6_dev; |
1778 | ||
1779 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1780 | |
1da177e4 LT |
1781 | if (len < sizeof(struct prefix_info)) { |
1782 | ADBG(("addrconf: prefix option too short\n")); | |
1783 | return; | |
1784 | } | |
1ab1457c | 1785 | |
1da177e4 LT |
1786 | /* |
1787 | * Validation checks ([ADDRCONF], page 19) | |
1788 | */ | |
1789 | ||
1790 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1791 | ||
1792 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1793 | return; | |
1794 | ||
1795 | valid_lft = ntohl(pinfo->valid); | |
1796 | prefered_lft = ntohl(pinfo->prefered); | |
1797 | ||
1798 | if (prefered_lft > valid_lft) { | |
1799 | if (net_ratelimit()) | |
1800 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1801 | return; | |
1802 | } | |
1803 | ||
1804 | in6_dev = in6_dev_get(dev); | |
1805 | ||
1806 | if (in6_dev == NULL) { | |
1807 | if (net_ratelimit()) | |
1808 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1809 | return; | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Two things going on here: | |
1814 | * 1) Add routes for on-link prefixes | |
1815 | * 2) Configure prefixes with the auto flag set | |
1816 | */ | |
1817 | ||
4bed72e4 YH |
1818 | if (pinfo->onlink) { |
1819 | struct rt6_info *rt; | |
1820 | unsigned long rt_expires; | |
1821 | ||
6f704992 YH |
1822 | /* Avoid arithmetic overflow. Really, we could |
1823 | * save rt_expires in seconds, likely valid_lft, | |
1824 | * but it would require division in fib gc, that it | |
1825 | * not good. | |
1826 | */ | |
4bed72e4 YH |
1827 | if (HZ > USER_HZ) |
1828 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1829 | else | |
1830 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1831 | |
4bed72e4 YH |
1832 | if (addrconf_finite_timeout(rt_expires)) |
1833 | rt_expires *= HZ; | |
1da177e4 | 1834 | |
c346dca1 | 1835 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
6fda7350 | 1836 | dev->ifindex, 1); |
1da177e4 | 1837 | |
2b5ead46 | 1838 | if (rt && addrconf_is_prefix_route(rt)) { |
6f704992 YH |
1839 | /* Autoconf prefix route */ |
1840 | if (valid_lft == 0) { | |
1841 | ip6_del_rt(rt); | |
1842 | rt = NULL; | |
4bed72e4 | 1843 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1844 | /* not infinity */ |
1845 | rt->rt6i_expires = jiffies + rt_expires; | |
1846 | rt->rt6i_flags |= RTF_EXPIRES; | |
1847 | } else { | |
1848 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1849 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1850 | } |
1851 | } else if (valid_lft) { | |
6f704992 | 1852 | clock_t expires = 0; |
4bed72e4 YH |
1853 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1854 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1855 | /* not infinity */ |
1856 | flags |= RTF_EXPIRES; | |
1857 | expires = jiffies_to_clock_t(rt_expires); | |
1858 | } | |
1da177e4 | 1859 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1860 | dev, expires, flags); |
1da177e4 LT |
1861 | } |
1862 | if (rt) | |
1863 | dst_release(&rt->u.dst); | |
1864 | } | |
1865 | ||
1866 | /* Try to figure out our local address for this prefix */ | |
1867 | ||
1868 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1869 | struct inet6_ifaddr * ifp; | |
1870 | struct in6_addr addr; | |
1871 | int create = 0, update_lft = 0; | |
53b7997f | 1872 | struct net *net = dev_net(dev); |
1da177e4 LT |
1873 | |
1874 | if (pinfo->prefix_len == 64) { | |
1875 | memcpy(&addr, &pinfo->prefix, 8); | |
1876 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1877 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1878 | in6_dev_put(in6_dev); | |
1879 | return; | |
1880 | } | |
1881 | goto ok; | |
1882 | } | |
1883 | if (net_ratelimit()) | |
1884 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1885 | pinfo->prefix_len); | |
1886 | in6_dev_put(in6_dev); | |
1887 | return; | |
1888 | ||
1889 | ok: | |
1890 | ||
53b7997f | 1891 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1892 | |
1893 | if (ifp == NULL && valid_lft) { | |
1894 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1895 | u32 addr_flags = 0; |
1896 | ||
1897 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1898 | if (in6_dev->cnf.optimistic_dad && | |
53b7997f | 1899 | !net->ipv6.devconf_all->forwarding) |
95c385b4 NH |
1900 | addr_flags = IFA_F_OPTIMISTIC; |
1901 | #endif | |
1da177e4 LT |
1902 | |
1903 | /* Do not allow to create too much of autoconfigured | |
1904 | * addresses; this would be too easy way to crash kernel. | |
1905 | */ | |
1906 | if (!max_addresses || | |
1907 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1908 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1909 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1910 | addr_flags); | |
1da177e4 LT |
1911 | |
1912 | if (!ifp || IS_ERR(ifp)) { | |
1913 | in6_dev_put(in6_dev); | |
1914 | return; | |
1915 | } | |
1916 | ||
1917 | update_lft = create = 1; | |
1918 | ifp->cstamp = jiffies; | |
1919 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1920 | } | |
1921 | ||
1922 | if (ifp) { | |
1923 | int flags; | |
1924 | unsigned long now; | |
1925 | #ifdef CONFIG_IPV6_PRIVACY | |
1926 | struct inet6_ifaddr *ift; | |
1927 | #endif | |
1928 | u32 stored_lft; | |
1929 | ||
1930 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1931 | spin_lock(&ifp->lock); | |
1932 | now = jiffies; | |
1933 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1934 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1935 | else | |
1936 | stored_lft = 0; | |
1937 | if (!update_lft && stored_lft) { | |
1938 | if (valid_lft > MIN_VALID_LIFETIME || | |
1939 | valid_lft > stored_lft) | |
1940 | update_lft = 1; | |
1941 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1942 | /* valid_lft <= stored_lft is always true */ | |
1943 | /* XXX: IPsec */ | |
1944 | update_lft = 0; | |
1945 | } else { | |
1946 | valid_lft = MIN_VALID_LIFETIME; | |
1947 | if (valid_lft < prefered_lft) | |
1948 | prefered_lft = valid_lft; | |
1949 | update_lft = 1; | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | if (update_lft) { | |
1954 | ifp->valid_lft = valid_lft; | |
1955 | ifp->prefered_lft = prefered_lft; | |
1956 | ifp->tstamp = now; | |
1957 | flags = ifp->flags; | |
1958 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1959 | spin_unlock(&ifp->lock); | |
1960 | ||
1961 | if (!(flags&IFA_F_TENTATIVE)) | |
1962 | ipv6_ifa_notify(0, ifp); | |
1963 | } else | |
1964 | spin_unlock(&ifp->lock); | |
1965 | ||
1966 | #ifdef CONFIG_IPV6_PRIVACY | |
1967 | read_lock_bh(&in6_dev->lock); | |
1968 | /* update all temporary addresses in the list */ | |
1969 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1970 | /* | |
1971 | * When adjusting the lifetimes of an existing | |
1972 | * temporary address, only lower the lifetimes. | |
1973 | * Implementations must not increase the | |
1974 | * lifetimes of an existing temporary address | |
1975 | * when processing a Prefix Information Option. | |
1976 | */ | |
c6fbfac2 BB |
1977 | if (ifp != ift->ifpub) |
1978 | continue; | |
1979 | ||
1da177e4 LT |
1980 | spin_lock(&ift->lock); |
1981 | flags = ift->flags; | |
1982 | if (ift->valid_lft > valid_lft && | |
1983 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1984 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1985 | if (ift->prefered_lft > prefered_lft && | |
1986 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1987 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1988 | spin_unlock(&ift->lock); | |
1989 | if (!(flags&IFA_F_TENTATIVE)) | |
1990 | ipv6_ifa_notify(0, ift); | |
1991 | } | |
1992 | ||
1993 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1994 | /* | |
1995 | * When a new public address is created as described in [ADDRCONF], | |
1996 | * also create a new temporary address. | |
1997 | */ | |
1ab1457c | 1998 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1999 | ipv6_create_tempaddr(ifp, NULL); |
2000 | } else { | |
2001 | read_unlock_bh(&in6_dev->lock); | |
2002 | } | |
2003 | #endif | |
2004 | in6_ifa_put(ifp); | |
2005 | addrconf_verify(0); | |
2006 | } | |
2007 | } | |
2008 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2009 | in6_dev_put(in6_dev); | |
2010 | } | |
2011 | ||
2012 | /* | |
2013 | * Set destination address. | |
2014 | * Special case for SIT interfaces where we create a new "virtual" | |
2015 | * device. | |
2016 | */ | |
af284937 | 2017 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2018 | { |
2019 | struct in6_ifreq ireq; | |
2020 | struct net_device *dev; | |
2021 | int err = -EINVAL; | |
2022 | ||
2023 | rtnl_lock(); | |
2024 | ||
2025 | err = -EFAULT; | |
2026 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2027 | goto err_exit; | |
2028 | ||
af284937 | 2029 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2030 | |
2031 | err = -ENODEV; | |
2032 | if (dev == NULL) | |
2033 | goto err_exit; | |
2034 | ||
0be669bb | 2035 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2036 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2037 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2038 | struct ifreq ifr; |
1da177e4 LT |
2039 | struct ip_tunnel_parm p; |
2040 | ||
2041 | err = -EADDRNOTAVAIL; | |
2042 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2043 | goto err_exit; | |
2044 | ||
2045 | memset(&p, 0, sizeof(p)); | |
2046 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2047 | p.iph.saddr = 0; | |
2048 | p.iph.version = 4; | |
2049 | p.iph.ihl = 5; | |
2050 | p.iph.protocol = IPPROTO_IPV6; | |
2051 | p.iph.ttl = 64; | |
d20b3109 | 2052 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2053 | |
5bc3eb7e SH |
2054 | if (ops->ndo_do_ioctl) { |
2055 | mm_segment_t oldfs = get_fs(); | |
2056 | ||
2057 | set_fs(KERNEL_DS); | |
2058 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2059 | set_fs(oldfs); | |
2060 | } else | |
2061 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2062 | |
2063 | if (err == 0) { | |
2064 | err = -ENOBUFS; | |
af284937 DL |
2065 | dev = __dev_get_by_name(net, p.name); |
2066 | if (!dev) | |
1da177e4 LT |
2067 | goto err_exit; |
2068 | err = dev_open(dev); | |
2069 | } | |
2070 | } | |
0be669bb | 2071 | #endif |
1da177e4 LT |
2072 | |
2073 | err_exit: | |
2074 | rtnl_unlock(); | |
2075 | return err; | |
2076 | } | |
2077 | ||
2078 | /* | |
2079 | * Manual configuration of address on an interface | |
2080 | */ | |
af284937 | 2081 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2082 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2083 | __u32 valid_lft) |
1da177e4 LT |
2084 | { |
2085 | struct inet6_ifaddr *ifp; | |
2086 | struct inet6_dev *idev; | |
2087 | struct net_device *dev; | |
2088 | int scope; | |
6f704992 YH |
2089 | u32 flags; |
2090 | clock_t expires; | |
4bed72e4 | 2091 | unsigned long timeout; |
1da177e4 LT |
2092 | |
2093 | ASSERT_RTNL(); | |
1ab1457c | 2094 | |
24ef0da7 TG |
2095 | if (plen > 128) |
2096 | return -EINVAL; | |
2097 | ||
0778769d NT |
2098 | /* check the lifetime */ |
2099 | if (!valid_lft || prefered_lft > valid_lft) | |
2100 | return -EINVAL; | |
2101 | ||
af284937 DL |
2102 | dev = __dev_get_by_index(net, ifindex); |
2103 | if (!dev) | |
1da177e4 | 2104 | return -ENODEV; |
1ab1457c | 2105 | |
1da177e4 LT |
2106 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2107 | return -ENOBUFS; | |
2108 | ||
2109 | scope = ipv6_addr_scope(pfx); | |
2110 | ||
4bed72e4 YH |
2111 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2112 | if (addrconf_finite_timeout(timeout)) { | |
2113 | expires = jiffies_to_clock_t(timeout * HZ); | |
2114 | valid_lft = timeout; | |
6f704992 | 2115 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2116 | } else { |
2117 | expires = 0; | |
2118 | flags = 0; | |
2119 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2120 | } |
0778769d | 2121 | |
4bed72e4 YH |
2122 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2123 | if (addrconf_finite_timeout(timeout)) { | |
2124 | if (timeout == 0) | |
2125 | ifa_flags |= IFA_F_DEPRECATED; | |
2126 | prefered_lft = timeout; | |
2127 | } | |
0778769d NT |
2128 | |
2129 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2130 | ||
1da177e4 | 2131 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2132 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2133 | ifp->valid_lft = valid_lft; |
2134 | ifp->prefered_lft = prefered_lft; | |
2135 | ifp->tstamp = jiffies; | |
06aebfb7 | 2136 | spin_unlock_bh(&ifp->lock); |
0778769d | 2137 | |
46d48046 | 2138 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2139 | expires, flags); |
95c385b4 NH |
2140 | /* |
2141 | * Note that section 3.1 of RFC 4429 indicates | |
2142 | * that the Optimistic flag should not be set for | |
2143 | * manually configured addresses | |
2144 | */ | |
1da177e4 LT |
2145 | addrconf_dad_start(ifp, 0); |
2146 | in6_ifa_put(ifp); | |
0778769d | 2147 | addrconf_verify(0); |
1da177e4 LT |
2148 | return 0; |
2149 | } | |
2150 | ||
2151 | return PTR_ERR(ifp); | |
2152 | } | |
2153 | ||
af284937 | 2154 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2155 | unsigned int plen) |
1da177e4 LT |
2156 | { |
2157 | struct inet6_ifaddr *ifp; | |
2158 | struct inet6_dev *idev; | |
2159 | struct net_device *dev; | |
1ab1457c | 2160 | |
24ef0da7 TG |
2161 | if (plen > 128) |
2162 | return -EINVAL; | |
2163 | ||
af284937 DL |
2164 | dev = __dev_get_by_index(net, ifindex); |
2165 | if (!dev) | |
1da177e4 LT |
2166 | return -ENODEV; |
2167 | ||
2168 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2169 | return -ENXIO; | |
2170 | ||
2171 | read_lock_bh(&idev->lock); | |
2172 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2173 | if (ifp->prefix_len == plen && | |
2174 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2175 | in6_ifa_hold(ifp); | |
2176 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2177 | |
1da177e4 LT |
2178 | ipv6_del_addr(ifp); |
2179 | ||
2180 | /* If the last address is deleted administratively, | |
2181 | disable IPv6 on this interface. | |
2182 | */ | |
2183 | if (idev->addr_list == NULL) | |
2184 | addrconf_ifdown(idev->dev, 1); | |
2185 | return 0; | |
2186 | } | |
2187 | } | |
2188 | read_unlock_bh(&idev->lock); | |
2189 | return -EADDRNOTAVAIL; | |
2190 | } | |
2191 | ||
2192 | ||
af284937 | 2193 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2194 | { |
2195 | struct in6_ifreq ireq; | |
2196 | int err; | |
1ab1457c | 2197 | |
1da177e4 LT |
2198 | if (!capable(CAP_NET_ADMIN)) |
2199 | return -EPERM; | |
1ab1457c | 2200 | |
1da177e4 LT |
2201 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2202 | return -EFAULT; | |
2203 | ||
2204 | rtnl_lock(); | |
af284937 DL |
2205 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2206 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2207 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2208 | rtnl_unlock(); |
2209 | return err; | |
2210 | } | |
2211 | ||
af284937 | 2212 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2213 | { |
2214 | struct in6_ifreq ireq; | |
2215 | int err; | |
1ab1457c | 2216 | |
1da177e4 LT |
2217 | if (!capable(CAP_NET_ADMIN)) |
2218 | return -EPERM; | |
2219 | ||
2220 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2221 | return -EFAULT; | |
2222 | ||
2223 | rtnl_lock(); | |
af284937 DL |
2224 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2225 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2226 | rtnl_unlock(); |
2227 | return err; | |
2228 | } | |
2229 | ||
0be669bb | 2230 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2231 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2232 | { | |
2233 | struct inet6_ifaddr * ifp; | |
2234 | struct in6_addr addr; | |
2235 | struct net_device *dev; | |
c346dca1 | 2236 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2237 | int scope; |
2238 | ||
2239 | ASSERT_RTNL(); | |
2240 | ||
2241 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2242 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2243 | ||
2244 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2245 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2246 | scope = IFA_LINK; | |
2247 | } else { | |
2248 | scope = IPV6_ADDR_COMPATv4; | |
2249 | } | |
2250 | ||
2251 | if (addr.s6_addr32[3]) { | |
2252 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2253 | if (!IS_ERR(ifp)) { | |
2254 | spin_lock_bh(&ifp->lock); | |
2255 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2256 | spin_unlock_bh(&ifp->lock); | |
2257 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2258 | in6_ifa_put(ifp); | |
2259 | } | |
2260 | return; | |
2261 | } | |
2262 | ||
6fda7350 | 2263 | for_each_netdev(net, dev) { |
e5ed6399 | 2264 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2265 | if (in_dev && (dev->flags & IFF_UP)) { |
2266 | struct in_ifaddr * ifa; | |
2267 | ||
2268 | int flag = scope; | |
2269 | ||
2270 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2271 | int plen; | |
2272 | ||
2273 | addr.s6_addr32[3] = ifa->ifa_local; | |
2274 | ||
2275 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2276 | continue; | |
2277 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2278 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2279 | continue; | |
2280 | flag |= IFA_HOST; | |
2281 | } | |
2282 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2283 | plen = 64; | |
2284 | else | |
2285 | plen = 96; | |
2286 | ||
2287 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2288 | IFA_F_PERMANENT); | |
2289 | if (!IS_ERR(ifp)) { | |
2290 | spin_lock_bh(&ifp->lock); | |
2291 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2292 | spin_unlock_bh(&ifp->lock); | |
2293 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2294 | in6_ifa_put(ifp); | |
2295 | } | |
2296 | } | |
2297 | } | |
1ab1457c | 2298 | } |
1da177e4 | 2299 | } |
0be669bb | 2300 | #endif |
1da177e4 LT |
2301 | |
2302 | static void init_loopback(struct net_device *dev) | |
2303 | { | |
2304 | struct inet6_dev *idev; | |
2305 | struct inet6_ifaddr * ifp; | |
2306 | ||
2307 | /* ::1 */ | |
2308 | ||
2309 | ASSERT_RTNL(); | |
2310 | ||
2311 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2312 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2313 | return; | |
2314 | } | |
2315 | ||
2316 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2317 | if (!IS_ERR(ifp)) { | |
2318 | spin_lock_bh(&ifp->lock); | |
2319 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2320 | spin_unlock_bh(&ifp->lock); | |
2321 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2322 | in6_ifa_put(ifp); | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2327 | { | |
2328 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2329 | u32 addr_flags = IFA_F_PERMANENT; |
2330 | ||
2331 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2332 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2333 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2334 | addr_flags |= IFA_F_OPTIMISTIC; |
2335 | #endif | |
1da177e4 | 2336 | |
95c385b4 NH |
2337 | |
2338 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2339 | if (!IS_ERR(ifp)) { |
46d48046 | 2340 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2341 | addrconf_dad_start(ifp, 0); |
2342 | in6_ifa_put(ifp); | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | static void addrconf_dev_config(struct net_device *dev) | |
2347 | { | |
2348 | struct in6_addr addr; | |
2349 | struct inet6_dev * idev; | |
2350 | ||
2351 | ASSERT_RTNL(); | |
2352 | ||
74235a25 HX |
2353 | if ((dev->type != ARPHRD_ETHER) && |
2354 | (dev->type != ARPHRD_FDDI) && | |
2355 | (dev->type != ARPHRD_IEEE802_TR) && | |
2356 | (dev->type != ARPHRD_ARCNET) && | |
2357 | (dev->type != ARPHRD_INFINIBAND)) { | |
2358 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2359 | return; | |
2360 | } | |
2361 | ||
1da177e4 LT |
2362 | idev = addrconf_add_dev(dev); |
2363 | if (idev == NULL) | |
2364 | return; | |
2365 | ||
2366 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2367 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2368 | ||
2369 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2370 | addrconf_add_linklocal(idev, &addr); | |
2371 | } | |
2372 | ||
0be669bb | 2373 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2374 | static void addrconf_sit_config(struct net_device *dev) |
2375 | { | |
2376 | struct inet6_dev *idev; | |
2377 | ||
2378 | ASSERT_RTNL(); | |
2379 | ||
1ab1457c YH |
2380 | /* |
2381 | * Configure the tunnel with one of our IPv4 | |
2382 | * addresses... we should configure all of | |
1da177e4 LT |
2383 | * our v4 addrs in the tunnel |
2384 | */ | |
2385 | ||
2386 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2387 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2388 | return; | |
2389 | } | |
2390 | ||
c7dc89c0 FT |
2391 | if (dev->priv_flags & IFF_ISATAP) { |
2392 | struct in6_addr addr; | |
2393 | ||
2394 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2395 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2396 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2397 | addrconf_add_linklocal(idev, &addr); | |
2398 | return; | |
2399 | } | |
2400 | ||
1da177e4 LT |
2401 | sit_add_v4_addrs(idev); |
2402 | ||
2403 | if (dev->flags&IFF_POINTOPOINT) { | |
2404 | addrconf_add_mroute(dev); | |
2405 | addrconf_add_lroute(dev); | |
2406 | } else | |
2407 | sit_route_add(dev); | |
2408 | } | |
0be669bb | 2409 | #endif |
1da177e4 LT |
2410 | |
2411 | static inline int | |
2412 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2413 | { | |
2414 | struct in6_addr lladdr; | |
2415 | ||
95c385b4 | 2416 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2417 | addrconf_add_linklocal(idev, &lladdr); |
2418 | return 0; | |
2419 | } | |
2420 | return -1; | |
2421 | } | |
2422 | ||
2423 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2424 | { | |
2425 | struct net_device *link_dev; | |
c346dca1 | 2426 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2427 | |
2428 | /* first try to inherit the link-local address from the link device */ | |
2429 | if (idev->dev->iflink && | |
6fda7350 | 2430 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2431 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2432 | return; | |
2433 | } | |
2434 | /* then try to inherit it from any device */ | |
6fda7350 | 2435 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2436 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2437 | return; | |
2438 | } | |
2439 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2440 | } | |
2441 | ||
2442 | /* | |
2443 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2444 | * DHCPv6, MLD etc. can be run over the virtual link | |
2445 | */ | |
2446 | ||
2447 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2448 | { | |
2449 | struct inet6_dev *idev; | |
2450 | ||
2451 | ASSERT_RTNL(); | |
2452 | ||
2453 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2454 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2455 | return; | |
2456 | } | |
2457 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2458 | } |
2459 | ||
1ab1457c | 2460 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2461 | void * data) |
2462 | { | |
2463 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2464 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2465 | int run_pending = 0; |
b217d616 | 2466 | int err; |
1da177e4 LT |
2467 | |
2468 | switch(event) { | |
45ba9dd2 | 2469 | case NETDEV_REGISTER: |
74235a25 | 2470 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2471 | idev = ipv6_add_dev(dev); |
2472 | if (!idev) | |
b217d616 | 2473 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2474 | } |
2475 | break; | |
1da177e4 | 2476 | case NETDEV_UP: |
3c21edbd | 2477 | case NETDEV_CHANGE: |
c2edacf8 JV |
2478 | if (dev->flags & IFF_SLAVE) |
2479 | break; | |
2480 | ||
3c21edbd | 2481 | if (event == NETDEV_UP) { |
f24e3d65 | 2482 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2483 | /* device is not ready yet. */ |
2484 | printk(KERN_INFO | |
2485 | "ADDRCONF(NETDEV_UP): %s: " | |
2486 | "link is not ready\n", | |
2487 | dev->name); | |
2488 | break; | |
2489 | } | |
99081049 | 2490 | |
d31c7b8f EP |
2491 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2492 | idev = ipv6_add_dev(dev); | |
2493 | ||
e3ec6cfc | 2494 | if (idev) { |
99081049 | 2495 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2496 | run_pending = 1; |
2497 | } | |
3c21edbd | 2498 | } else { |
f24e3d65 | 2499 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2500 | /* device is still not ready. */ |
2501 | break; | |
2502 | } | |
2503 | ||
2504 | if (idev) { | |
2505 | if (idev->if_flags & IF_READY) { | |
2506 | /* device is already configured. */ | |
2507 | break; | |
2508 | } | |
2509 | idev->if_flags |= IF_READY; | |
2510 | } | |
2511 | ||
2512 | printk(KERN_INFO | |
2513 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2514 | "link becomes ready\n", | |
2515 | dev->name); | |
2516 | ||
c5e33bdd | 2517 | run_pending = 1; |
3c21edbd YH |
2518 | } |
2519 | ||
1da177e4 | 2520 | switch(dev->type) { |
0be669bb | 2521 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2522 | case ARPHRD_SIT: |
2523 | addrconf_sit_config(dev); | |
2524 | break; | |
0be669bb | 2525 | #endif |
1da177e4 LT |
2526 | case ARPHRD_TUNNEL6: |
2527 | addrconf_ip6_tnl_config(dev); | |
2528 | break; | |
2529 | case ARPHRD_LOOPBACK: | |
2530 | init_loopback(dev); | |
2531 | break; | |
2532 | ||
2533 | default: | |
2534 | addrconf_dev_config(dev); | |
2535 | break; | |
3ff50b79 | 2536 | } |
1da177e4 | 2537 | if (idev) { |
c5e33bdd YH |
2538 | if (run_pending) |
2539 | addrconf_dad_run(idev); | |
2540 | ||
1da177e4 LT |
2541 | /* If the MTU changed during the interface down, when the |
2542 | interface up, the changed MTU must be reflected in the | |
2543 | idev as well as routers. | |
2544 | */ | |
2545 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2546 | rt6_mtu_change(dev, dev->mtu); | |
2547 | idev->cnf.mtu6 = dev->mtu; | |
2548 | } | |
2549 | idev->tstamp = jiffies; | |
2550 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2551 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2552 | stop IPv6 on this interface. | |
2553 | */ | |
2554 | if (dev->mtu < IPV6_MIN_MTU) | |
2555 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2556 | } | |
2557 | break; | |
2558 | ||
2559 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2560 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2561 | rt6_mtu_change(dev, dev->mtu); |
2562 | idev->cnf.mtu6 = dev->mtu; | |
2563 | break; | |
2564 | } | |
2565 | ||
d31c7b8f EP |
2566 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2567 | idev = ipv6_add_dev(dev); | |
2568 | if (idev) | |
2569 | break; | |
2570 | } | |
2571 | ||
1da177e4 LT |
2572 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2573 | ||
2574 | case NETDEV_DOWN: | |
2575 | case NETDEV_UNREGISTER: | |
2576 | /* | |
2577 | * Remove all addresses from this interface. | |
2578 | */ | |
2579 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2580 | break; | |
3c21edbd | 2581 | |
1da177e4 | 2582 | case NETDEV_CHANGENAME: |
1da177e4 | 2583 | if (idev) { |
5632c515 | 2584 | snmp6_unregister_dev(idev); |
408c4768 | 2585 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2586 | addrconf_sysctl_register(idev); |
b217d616 HX |
2587 | err = snmp6_register_dev(idev); |
2588 | if (err) | |
2589 | return notifier_from_errno(err); | |
5632c515 | 2590 | } |
1da177e4 | 2591 | break; |
3ff50b79 | 2592 | } |
1da177e4 LT |
2593 | |
2594 | return NOTIFY_OK; | |
2595 | } | |
2596 | ||
2597 | /* | |
2598 | * addrconf module should be notified of a device going up | |
2599 | */ | |
2600 | static struct notifier_block ipv6_dev_notf = { | |
2601 | .notifier_call = addrconf_notify, | |
2602 | .priority = 0 | |
2603 | }; | |
2604 | ||
2605 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2606 | { | |
2607 | struct inet6_dev *idev; | |
2608 | struct inet6_ifaddr *ifa, **bifa; | |
c346dca1 | 2609 | struct net *net = dev_net(dev); |
1da177e4 LT |
2610 | int i; |
2611 | ||
2612 | ASSERT_RTNL(); | |
2613 | ||
f3db4851 | 2614 | rt6_ifdown(net, dev); |
1da177e4 LT |
2615 | neigh_ifdown(&nd_tbl, dev); |
2616 | ||
2617 | idev = __in6_dev_get(dev); | |
2618 | if (idev == NULL) | |
2619 | return -ENODEV; | |
2620 | ||
2621 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2622 | Do not dev_put! |
1da177e4 | 2623 | */ |
439e2385 | 2624 | if (how) { |
1da177e4 | 2625 | idev->dead = 1; |
8814c4b5 YH |
2626 | |
2627 | /* protected by rtnl_lock */ | |
2628 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2629 | |
2630 | /* Step 1.5: remove snmp6 entry */ | |
2631 | snmp6_unregister_dev(idev); | |
2632 | ||
2633 | } | |
2634 | ||
2635 | /* Step 2: clear hash table */ | |
2636 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2637 | bifa = &inet6_addr_lst[i]; | |
2638 | ||
2639 | write_lock_bh(&addrconf_hash_lock); | |
2640 | while ((ifa = *bifa) != NULL) { | |
2641 | if (ifa->idev == idev) { | |
2642 | *bifa = ifa->lst_next; | |
2643 | ifa->lst_next = NULL; | |
2644 | addrconf_del_timer(ifa); | |
2645 | in6_ifa_put(ifa); | |
2646 | continue; | |
2647 | } | |
2648 | bifa = &ifa->lst_next; | |
2649 | } | |
2650 | write_unlock_bh(&addrconf_hash_lock); | |
2651 | } | |
2652 | ||
2653 | write_lock_bh(&idev->lock); | |
2654 | ||
2655 | /* Step 3: clear flags for stateless addrconf */ | |
439e2385 | 2656 | if (!how) |
3c21edbd | 2657 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2658 | |
2659 | /* Step 4: clear address list */ | |
2660 | #ifdef CONFIG_IPV6_PRIVACY | |
439e2385 | 2661 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2662 | in6_dev_put(idev); |
2663 | ||
2664 | /* clear tempaddr list */ | |
2665 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2666 | idev->tempaddr_list = ifa->tmp_next; | |
2667 | ifa->tmp_next = NULL; | |
2668 | ifa->dead = 1; | |
2669 | write_unlock_bh(&idev->lock); | |
2670 | spin_lock_bh(&ifa->lock); | |
2671 | ||
2672 | if (ifa->ifpub) { | |
2673 | in6_ifa_put(ifa->ifpub); | |
2674 | ifa->ifpub = NULL; | |
2675 | } | |
2676 | spin_unlock_bh(&ifa->lock); | |
2677 | in6_ifa_put(ifa); | |
2678 | write_lock_bh(&idev->lock); | |
2679 | } | |
2680 | #endif | |
2681 | while ((ifa = idev->addr_list) != NULL) { | |
2682 | idev->addr_list = ifa->if_next; | |
2683 | ifa->if_next = NULL; | |
2684 | ifa->dead = 1; | |
2685 | addrconf_del_timer(ifa); | |
2686 | write_unlock_bh(&idev->lock); | |
2687 | ||
2688 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2689 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2690 | in6_ifa_put(ifa); |
2691 | ||
2692 | write_lock_bh(&idev->lock); | |
2693 | } | |
2694 | write_unlock_bh(&idev->lock); | |
2695 | ||
2696 | /* Step 5: Discard multicast list */ | |
2697 | ||
439e2385 | 2698 | if (how) |
1da177e4 LT |
2699 | ipv6_mc_destroy_dev(idev); |
2700 | else | |
2701 | ipv6_mc_down(idev); | |
2702 | ||
1da177e4 | 2703 | idev->tstamp = jiffies; |
1ab1457c | 2704 | |
1da177e4 LT |
2705 | /* Shot the device (if unregistered) */ |
2706 | ||
439e2385 | 2707 | if (how) { |
408c4768 | 2708 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2709 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2710 | neigh_ifdown(&nd_tbl, dev); | |
2711 | in6_dev_put(idev); | |
2712 | } | |
2713 | return 0; | |
2714 | } | |
2715 | ||
2716 | static void addrconf_rs_timer(unsigned long data) | |
2717 | { | |
2718 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2719 | ||
2720 | if (ifp->idev->cnf.forwarding) | |
2721 | goto out; | |
2722 | ||
2723 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2724 | /* | |
2725 | * Announcement received after solicitation | |
2726 | * was sent | |
2727 | */ | |
2728 | goto out; | |
2729 | } | |
2730 | ||
2731 | spin_lock(&ifp->lock); | |
2732 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
1da177e4 LT |
2733 | /* The wait after the last probe can be shorter */ |
2734 | addrconf_mod_timer(ifp, AC_RS, | |
2735 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2736 | ifp->idev->cnf.rtr_solicit_delay : | |
2737 | ifp->idev->cnf.rtr_solicit_interval); | |
2738 | spin_unlock(&ifp->lock); | |
2739 | ||
f3ee4010 | 2740 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2741 | } else { |
2742 | spin_unlock(&ifp->lock); | |
2743 | /* | |
2744 | * Note: we do not support deprecated "all on-link" | |
2745 | * assumption any longer. | |
2746 | */ | |
2747 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2748 | ifp->idev->dev->name); | |
2749 | } | |
2750 | ||
2751 | out: | |
2752 | in6_ifa_put(ifp); | |
2753 | } | |
2754 | ||
2755 | /* | |
2756 | * Duplicate Address Detection | |
2757 | */ | |
3c21edbd YH |
2758 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2759 | { | |
2760 | unsigned long rand_num; | |
2761 | struct inet6_dev *idev = ifp->idev; | |
2762 | ||
95c385b4 NH |
2763 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2764 | rand_num = 0; | |
2765 | else | |
2766 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2767 | ||
3c21edbd YH |
2768 | ifp->probes = idev->cnf.dad_transmits; |
2769 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2770 | } | |
2771 | ||
e431b8c0 | 2772 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2773 | { |
2774 | struct inet6_dev *idev = ifp->idev; | |
2775 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2776 | |
2777 | addrconf_join_solict(dev, &ifp->addr); | |
2778 | ||
1da177e4 | 2779 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2780 | |
2781 | read_lock_bh(&idev->lock); | |
2782 | if (ifp->dead) | |
2783 | goto out; | |
2784 | spin_lock_bh(&ifp->lock); | |
2785 | ||
2786 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 2787 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2788 | !(ifp->flags&IFA_F_TENTATIVE) || |
2789 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2790 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2791 | spin_unlock_bh(&ifp->lock); |
2792 | read_unlock_bh(&idev->lock); | |
2793 | ||
2794 | addrconf_dad_completed(ifp); | |
2795 | return; | |
2796 | } | |
2797 | ||
6732bade | 2798 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2799 | spin_unlock_bh(&ifp->lock); |
6732bade | 2800 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2801 | /* |
2802 | * If the defice is not ready: | |
2803 | * - keep it tentative if it is a permanent address. | |
2804 | * - otherwise, kill it. | |
2805 | */ | |
2806 | in6_ifa_hold(ifp); | |
2807 | addrconf_dad_stop(ifp); | |
6732bade | 2808 | return; |
3c21edbd | 2809 | } |
95c385b4 NH |
2810 | |
2811 | /* | |
2812 | * Optimistic nodes can start receiving | |
2813 | * Frames right away | |
2814 | */ | |
2815 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2816 | ip6_ins_rt(ifp->rt); | |
2817 | ||
6732bade YH |
2818 | addrconf_dad_kick(ifp); |
2819 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2820 | out: |
2821 | read_unlock_bh(&idev->lock); | |
2822 | } | |
2823 | ||
2824 | static void addrconf_dad_timer(unsigned long data) | |
2825 | { | |
2826 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2827 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2828 | struct in6_addr mcaddr; |
2829 | ||
2830 | read_lock_bh(&idev->lock); | |
2831 | if (idev->dead) { | |
2832 | read_unlock_bh(&idev->lock); | |
2833 | goto out; | |
2834 | } | |
1b34be74 YH |
2835 | if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) { |
2836 | read_unlock_bh(&idev->lock); | |
2837 | addrconf_dad_failure(ifp); | |
2838 | return; | |
2839 | } | |
1da177e4 LT |
2840 | spin_lock_bh(&ifp->lock); |
2841 | if (ifp->probes == 0) { | |
2842 | /* | |
2843 | * DAD was successful | |
2844 | */ | |
2845 | ||
95c385b4 | 2846 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2847 | spin_unlock_bh(&ifp->lock); |
2848 | read_unlock_bh(&idev->lock); | |
2849 | ||
2850 | addrconf_dad_completed(ifp); | |
2851 | ||
2852 | goto out; | |
2853 | } | |
2854 | ||
2855 | ifp->probes--; | |
2856 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2857 | spin_unlock_bh(&ifp->lock); | |
2858 | read_unlock_bh(&idev->lock); | |
2859 | ||
2860 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2861 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2862 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2863 | out: |
2864 | in6_ifa_put(ifp); | |
2865 | } | |
2866 | ||
2867 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2868 | { | |
2869 | struct net_device * dev = ifp->idev->dev; | |
2870 | ||
2871 | /* | |
2872 | * Configure the address for reception. Now it is valid. | |
2873 | */ | |
2874 | ||
2875 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2876 | ||
2877 | /* If added prefix is link local and forwarding is off, | |
2878 | start sending router solicitations. | |
2879 | */ | |
2880 | ||
2881 | if (ifp->idev->cnf.forwarding == 0 && | |
2882 | ifp->idev->cnf.rtr_solicits > 0 && | |
2883 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2884 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2885 | /* |
2886 | * If a host as already performed a random delay | |
2887 | * [...] as part of DAD [...] there is no need | |
2888 | * to delay again before sending the first RS | |
2889 | */ | |
f3ee4010 | 2890 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2891 | |
2892 | spin_lock_bh(&ifp->lock); | |
2893 | ifp->probes = 1; | |
2894 | ifp->idev->if_flags |= IF_RS_SENT; | |
2895 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2896 | spin_unlock_bh(&ifp->lock); | |
2897 | } | |
2898 | } | |
2899 | ||
c5e33bdd YH |
2900 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2901 | struct inet6_ifaddr *ifp; | |
2902 | ||
2903 | read_lock_bh(&idev->lock); | |
2904 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2905 | spin_lock_bh(&ifp->lock); | |
2906 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2907 | spin_unlock_bh(&ifp->lock); | |
2908 | continue; | |
2909 | } | |
2910 | spin_unlock_bh(&ifp->lock); | |
2911 | addrconf_dad_kick(ifp); | |
2912 | } | |
2913 | read_unlock_bh(&idev->lock); | |
2914 | } | |
2915 | ||
1da177e4 LT |
2916 | #ifdef CONFIG_PROC_FS |
2917 | struct if6_iter_state { | |
3c40090a | 2918 | struct seq_net_private p; |
1da177e4 LT |
2919 | int bucket; |
2920 | }; | |
2921 | ||
2922 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2923 | { | |
2924 | struct inet6_ifaddr *ifa = NULL; | |
2925 | struct if6_iter_state *state = seq->private; | |
1218854a | 2926 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2927 | |
2928 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2929 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2930 | |
878628fb | 2931 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2932 | ifa = ifa->lst_next; |
1da177e4 LT |
2933 | if (ifa) |
2934 | break; | |
2935 | } | |
2936 | return ifa; | |
2937 | } | |
2938 | ||
2939 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2940 | { | |
2941 | struct if6_iter_state *state = seq->private; | |
1218854a | 2942 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2943 | |
2944 | ifa = ifa->lst_next; | |
2945 | try_again: | |
3c40090a | 2946 | if (ifa) { |
878628fb | 2947 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2948 | ifa = ifa->lst_next; |
2949 | goto try_again; | |
2950 | } | |
2951 | } | |
2952 | ||
1da177e4 LT |
2953 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2954 | ifa = inet6_addr_lst[state->bucket]; | |
2955 | goto try_again; | |
2956 | } | |
3c40090a | 2957 | |
1da177e4 LT |
2958 | return ifa; |
2959 | } | |
2960 | ||
2961 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2962 | { | |
2963 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2964 | ||
2965 | if (ifa) | |
2966 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2967 | --pos; | |
2968 | return pos ? NULL : ifa; | |
2969 | } | |
2970 | ||
2971 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 2972 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
2973 | { |
2974 | read_lock_bh(&addrconf_hash_lock); | |
2975 | return if6_get_idx(seq, *pos); | |
2976 | } | |
2977 | ||
2978 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2979 | { | |
2980 | struct inet6_ifaddr *ifa; | |
2981 | ||
2982 | ifa = if6_get_next(seq, v); | |
2983 | ++*pos; | |
2984 | return ifa; | |
2985 | } | |
2986 | ||
2987 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 2988 | __releases(addrconf_hash_lock) |
1da177e4 LT |
2989 | { |
2990 | read_unlock_bh(&addrconf_hash_lock); | |
2991 | } | |
2992 | ||
2993 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2994 | { | |
2995 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 2996 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 2997 | &ifp->addr, |
1da177e4 LT |
2998 | ifp->idev->dev->ifindex, |
2999 | ifp->prefix_len, | |
3000 | ifp->scope, | |
3001 | ifp->flags, | |
3002 | ifp->idev->dev->name); | |
3003 | return 0; | |
3004 | } | |
3005 | ||
56b3d975 | 3006 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3007 | .start = if6_seq_start, |
3008 | .next = if6_seq_next, | |
3009 | .show = if6_seq_show, | |
3010 | .stop = if6_seq_stop, | |
3011 | }; | |
3012 | ||
3013 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3014 | { | |
3c40090a DL |
3015 | return seq_open_net(inode, file, &if6_seq_ops, |
3016 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3017 | } |
3018 | ||
9a32144e | 3019 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3020 | .owner = THIS_MODULE, |
3021 | .open = if6_seq_open, | |
3022 | .read = seq_read, | |
3023 | .llseek = seq_lseek, | |
3c40090a | 3024 | .release = seq_release_net, |
1da177e4 LT |
3025 | }; |
3026 | ||
3c40090a | 3027 | static int if6_proc_net_init(struct net *net) |
1da177e4 | 3028 | { |
3c40090a | 3029 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3030 | return -ENOMEM; |
3031 | return 0; | |
3032 | } | |
3033 | ||
3c40090a DL |
3034 | static void if6_proc_net_exit(struct net *net) |
3035 | { | |
3036 | proc_net_remove(net, "if_inet6"); | |
3037 | } | |
3038 | ||
3039 | static struct pernet_operations if6_proc_net_ops = { | |
3040 | .init = if6_proc_net_init, | |
3041 | .exit = if6_proc_net_exit, | |
3042 | }; | |
3043 | ||
3044 | int __init if6_proc_init(void) | |
3045 | { | |
3046 | return register_pernet_subsys(&if6_proc_net_ops); | |
3047 | } | |
3048 | ||
1da177e4 LT |
3049 | void if6_proc_exit(void) |
3050 | { | |
3c40090a | 3051 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3052 | } |
3053 | #endif /* CONFIG_PROC_FS */ | |
3054 | ||
59fbb3a6 | 3055 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3056 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3057 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3058 | { |
3059 | int ret = 0; | |
3060 | struct inet6_ifaddr * ifp; | |
3061 | u8 hash = ipv6_addr_hash(addr); | |
3062 | read_lock_bh(&addrconf_hash_lock); | |
3063 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 3064 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3065 | continue; |
caad295f | 3066 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3067 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3068 | ret = 1; | |
3069 | break; | |
3070 | } | |
3071 | } | |
3072 | read_unlock_bh(&addrconf_hash_lock); | |
3073 | return ret; | |
3074 | } | |
3075 | #endif | |
3076 | ||
1da177e4 LT |
3077 | /* |
3078 | * Periodic address status verification | |
3079 | */ | |
3080 | ||
3081 | static void addrconf_verify(unsigned long foo) | |
3082 | { | |
3083 | struct inet6_ifaddr *ifp; | |
3084 | unsigned long now, next; | |
3085 | int i; | |
3086 | ||
3087 | spin_lock_bh(&addrconf_verify_lock); | |
3088 | now = jiffies; | |
3089 | next = now + ADDR_CHECK_FREQUENCY; | |
3090 | ||
3091 | del_timer(&addr_chk_timer); | |
3092 | ||
3093 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3094 | ||
3095 | restart: | |
5d5780df | 3096 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
3097 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
3098 | unsigned long age; | |
3099 | #ifdef CONFIG_IPV6_PRIVACY | |
3100 | unsigned long regen_advance; | |
3101 | #endif | |
3102 | ||
3103 | if (ifp->flags & IFA_F_PERMANENT) | |
3104 | continue; | |
3105 | ||
3106 | spin_lock(&ifp->lock); | |
3107 | age = (now - ifp->tstamp) / HZ; | |
3108 | ||
3109 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3110 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3111 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3112 | ifp->idev->nd_parms->retrans_time / HZ; |
3113 | #endif | |
3114 | ||
8f27ebb9 YH |
3115 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3116 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3117 | spin_unlock(&ifp->lock); |
3118 | in6_ifa_hold(ifp); | |
5d5780df | 3119 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3120 | ipv6_del_addr(ifp); |
3121 | goto restart; | |
8f27ebb9 YH |
3122 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3123 | spin_unlock(&ifp->lock); | |
3124 | continue; | |
1da177e4 LT |
3125 | } else if (age >= ifp->prefered_lft) { |
3126 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
3127 | int deprecate = 0; | |
3128 | ||
3129 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3130 | deprecate = 1; | |
3131 | ifp->flags |= IFA_F_DEPRECATED; | |
3132 | } | |
3133 | ||
3134 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3135 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3136 | ||
3137 | spin_unlock(&ifp->lock); | |
3138 | ||
3139 | if (deprecate) { | |
3140 | in6_ifa_hold(ifp); | |
5d5780df | 3141 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3142 | |
3143 | ipv6_ifa_notify(0, ifp); | |
3144 | in6_ifa_put(ifp); | |
3145 | goto restart; | |
3146 | } | |
3147 | #ifdef CONFIG_IPV6_PRIVACY | |
3148 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3149 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3150 | if (age >= ifp->prefered_lft - regen_advance) { | |
3151 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3152 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3153 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3154 | if (!ifp->regen_count && ifpub) { | |
3155 | ifp->regen_count++; | |
3156 | in6_ifa_hold(ifp); | |
3157 | in6_ifa_hold(ifpub); | |
3158 | spin_unlock(&ifp->lock); | |
5d5780df | 3159 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3160 | spin_lock(&ifpub->lock); |
3161 | ifpub->regen_count = 0; | |
3162 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3163 | ipv6_create_tempaddr(ifpub, ifp); |
3164 | in6_ifa_put(ifpub); | |
3165 | in6_ifa_put(ifp); | |
3166 | goto restart; | |
3167 | } | |
3168 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3169 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3170 | spin_unlock(&ifp->lock); | |
3171 | #endif | |
3172 | } else { | |
3173 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3174 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3175 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3176 | spin_unlock(&ifp->lock); | |
3177 | } | |
3178 | } | |
5d5780df | 3179 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3180 | } |
3181 | ||
3182 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3183 | add_timer(&addr_chk_timer); | |
3184 | spin_unlock_bh(&addrconf_verify_lock); | |
3185 | } | |
3186 | ||
461d8837 TG |
3187 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3188 | { | |
3189 | struct in6_addr *pfx = NULL; | |
3190 | ||
3191 | if (addr) | |
3192 | pfx = nla_data(addr); | |
3193 | ||
3194 | if (local) { | |
3195 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3196 | pfx = NULL; | |
3197 | else | |
3198 | pfx = nla_data(local); | |
3199 | } | |
3200 | ||
3201 | return pfx; | |
3202 | } | |
3203 | ||
ef7c79ed | 3204 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3205 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3206 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3207 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3208 | }; | |
3209 | ||
1da177e4 LT |
3210 | static int |
3211 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3212 | { | |
3b1e0a65 | 3213 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3214 | struct ifaddrmsg *ifm; |
3215 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3216 | struct in6_addr *pfx; |
b933f716 | 3217 | int err; |
1da177e4 | 3218 | |
b933f716 TG |
3219 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3220 | if (err < 0) | |
3221 | return err; | |
3222 | ||
3223 | ifm = nlmsg_data(nlh); | |
3224 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3225 | if (pfx == NULL) |
3226 | return -EINVAL; | |
3227 | ||
af284937 | 3228 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3229 | } |
3230 | ||
55ebaef1 NT |
3231 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3232 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3233 | { |
6f704992 YH |
3234 | u32 flags; |
3235 | clock_t expires; | |
4bed72e4 | 3236 | unsigned long timeout; |
46d48046 | 3237 | |
081bba5b NT |
3238 | if (!valid_lft || (prefered_lft > valid_lft)) |
3239 | return -EINVAL; | |
3240 | ||
4bed72e4 YH |
3241 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3242 | if (addrconf_finite_timeout(timeout)) { | |
3243 | expires = jiffies_to_clock_t(timeout * HZ); | |
3244 | valid_lft = timeout; | |
6f704992 | 3245 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3246 | } else { |
3247 | expires = 0; | |
3248 | flags = 0; | |
3249 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3250 | } |
081bba5b | 3251 | |
4bed72e4 YH |
3252 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3253 | if (addrconf_finite_timeout(timeout)) { | |
3254 | if (timeout == 0) | |
3255 | ifa_flags |= IFA_F_DEPRECATED; | |
3256 | prefered_lft = timeout; | |
3257 | } | |
081bba5b NT |
3258 | |
3259 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3260 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3261 | ifp->tstamp = jiffies; |
3262 | ifp->valid_lft = valid_lft; | |
3263 | ifp->prefered_lft = prefered_lft; | |
3264 | ||
3265 | spin_unlock_bh(&ifp->lock); | |
3266 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3267 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3268 | |
46d48046 | 3269 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3270 | expires, flags); |
081bba5b NT |
3271 | addrconf_verify(0); |
3272 | ||
3273 | return 0; | |
3274 | } | |
3275 | ||
1da177e4 LT |
3276 | static int |
3277 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3278 | { | |
3b1e0a65 | 3279 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3280 | struct ifaddrmsg *ifm; |
3281 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3282 | struct in6_addr *pfx; |
7198f8ce TG |
3283 | struct inet6_ifaddr *ifa; |
3284 | struct net_device *dev; | |
55ebaef1 NT |
3285 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3286 | u8 ifa_flags; | |
461d8837 | 3287 | int err; |
1da177e4 | 3288 | |
461d8837 TG |
3289 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3290 | if (err < 0) | |
3291 | return err; | |
3292 | ||
3293 | ifm = nlmsg_data(nlh); | |
3294 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3295 | if (pfx == NULL) |
3296 | return -EINVAL; | |
3297 | ||
461d8837 | 3298 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3299 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3300 | |
3301 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3302 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3303 | preferred_lft = ci->ifa_prefered; |
3304 | } else { | |
3305 | preferred_lft = INFINITY_LIFE_TIME; | |
3306 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3307 | } |
3308 | ||
af284937 | 3309 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3310 | if (dev == NULL) |
3311 | return -ENODEV; | |
3312 | ||
55ebaef1 | 3313 | /* We ignore other flags so far. */ |
3b9f9a1c | 3314 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3315 | |
1cab3da6 | 3316 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3317 | if (ifa == NULL) { |
3318 | /* | |
3319 | * It would be best to check for !NLM_F_CREATE here but | |
3320 | * userspace alreay relies on not having to provide this. | |
3321 | */ | |
af284937 DL |
3322 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3323 | ifm->ifa_prefixlen, ifa_flags, | |
3324 | preferred_lft, valid_lft); | |
081bba5b NT |
3325 | } |
3326 | ||
7198f8ce TG |
3327 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3328 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3329 | err = -EEXIST; | |
3330 | else | |
55ebaef1 | 3331 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3332 | |
3333 | in6_ifa_put(ifa); | |
3334 | ||
3335 | return err; | |
1da177e4 LT |
3336 | } |
3337 | ||
101bb229 TG |
3338 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3339 | u8 scope, int ifindex) | |
3340 | { | |
3341 | struct ifaddrmsg *ifm; | |
3342 | ||
3343 | ifm = nlmsg_data(nlh); | |
3344 | ifm->ifa_family = AF_INET6; | |
3345 | ifm->ifa_prefixlen = prefixlen; | |
3346 | ifm->ifa_flags = flags; | |
3347 | ifm->ifa_scope = scope; | |
3348 | ifm->ifa_index = ifindex; | |
3349 | } | |
3350 | ||
85486af0 TG |
3351 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3352 | unsigned long tstamp, u32 preferred, u32 valid) | |
3353 | { | |
3354 | struct ifa_cacheinfo ci; | |
3355 | ||
3356 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3357 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3358 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3359 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3360 | ci.ifa_prefered = preferred; | |
3361 | ci.ifa_valid = valid; | |
3362 | ||
3363 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3364 | } | |
3365 | ||
101bb229 TG |
3366 | static inline int rt_scope(int ifa_scope) |
3367 | { | |
3368 | if (ifa_scope & IFA_HOST) | |
3369 | return RT_SCOPE_HOST; | |
3370 | else if (ifa_scope & IFA_LINK) | |
3371 | return RT_SCOPE_LINK; | |
3372 | else if (ifa_scope & IFA_SITE) | |
3373 | return RT_SCOPE_SITE; | |
3374 | else | |
3375 | return RT_SCOPE_UNIVERSE; | |
3376 | } | |
3377 | ||
0ab6803b TG |
3378 | static inline int inet6_ifaddr_msgsize(void) |
3379 | { | |
339bf98f TG |
3380 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3381 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3382 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3383 | } |
c5396a31 | 3384 | |
1da177e4 | 3385 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3386 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3387 | { |
1da177e4 | 3388 | struct nlmsghdr *nlh; |
85486af0 | 3389 | u32 preferred, valid; |
1da177e4 | 3390 | |
0ab6803b TG |
3391 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3392 | if (nlh == NULL) | |
26932566 | 3393 | return -EMSGSIZE; |
0ab6803b | 3394 | |
101bb229 TG |
3395 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3396 | ifa->idev->dev->ifindex); | |
3397 | ||
1da177e4 | 3398 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3399 | preferred = ifa->prefered_lft; |
3400 | valid = ifa->valid_lft; | |
3401 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3402 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3403 | preferred -= tval; |
3404 | if (valid != INFINITY_LIFE_TIME) | |
3405 | valid -= tval; | |
1da177e4 LT |
3406 | } |
3407 | } else { | |
85486af0 TG |
3408 | preferred = INFINITY_LIFE_TIME; |
3409 | valid = INFINITY_LIFE_TIME; | |
3410 | } | |
3411 | ||
0ab6803b | 3412 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3413 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3414 | nlmsg_cancel(skb, nlh); | |
3415 | return -EMSGSIZE; | |
3416 | } | |
1da177e4 | 3417 | |
0ab6803b | 3418 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3419 | } |
3420 | ||
3421 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3422 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3423 | { |
1da177e4 | 3424 | struct nlmsghdr *nlh; |
101bb229 TG |
3425 | u8 scope = RT_SCOPE_UNIVERSE; |
3426 | int ifindex = ifmca->idev->dev->ifindex; | |
3427 | ||
3428 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3429 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3430 | |
0ab6803b TG |
3431 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3432 | if (nlh == NULL) | |
26932566 | 3433 | return -EMSGSIZE; |
85486af0 | 3434 | |
0ab6803b TG |
3435 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3436 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3437 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3438 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3439 | nlmsg_cancel(skb, nlh); | |
3440 | return -EMSGSIZE; | |
3441 | } | |
85486af0 | 3442 | |
0ab6803b | 3443 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3444 | } |
3445 | ||
3446 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3447 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3448 | { |
1da177e4 | 3449 | struct nlmsghdr *nlh; |
101bb229 TG |
3450 | u8 scope = RT_SCOPE_UNIVERSE; |
3451 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3452 | ||
3453 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3454 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3455 | |
0ab6803b TG |
3456 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3457 | if (nlh == NULL) | |
26932566 | 3458 | return -EMSGSIZE; |
85486af0 | 3459 | |
0ab6803b TG |
3460 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3461 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3462 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3463 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3464 | nlmsg_cancel(skb, nlh); | |
3465 | return -EMSGSIZE; | |
3466 | } | |
1da177e4 | 3467 | |
0ab6803b | 3468 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3469 | } |
3470 | ||
3471 | enum addr_type_t | |
3472 | { | |
3473 | UNICAST_ADDR, | |
3474 | MULTICAST_ADDR, | |
3475 | ANYCAST_ADDR, | |
3476 | }; | |
3477 | ||
3478 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3479 | enum addr_type_t type) | |
3480 | { | |
3481 | int idx, ip_idx; | |
3482 | int s_idx, s_ip_idx; | |
3483 | int err = 1; | |
3484 | struct net_device *dev; | |
3485 | struct inet6_dev *idev = NULL; | |
3486 | struct inet6_ifaddr *ifa; | |
3487 | struct ifmcaddr6 *ifmca; | |
3488 | struct ifacaddr6 *ifaca; | |
3b1e0a65 | 3489 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3490 | |
3491 | s_idx = cb->args[0]; | |
3492 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3493 | |
7562f876 | 3494 | idx = 0; |
6fda7350 | 3495 | for_each_netdev(net, dev) { |
1da177e4 | 3496 | if (idx < s_idx) |
7562f876 | 3497 | goto cont; |
1da177e4 LT |
3498 | if (idx > s_idx) |
3499 | s_ip_idx = 0; | |
3500 | ip_idx = 0; | |
3501 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3502 | goto cont; |
1da177e4 LT |
3503 | read_lock_bh(&idev->lock); |
3504 | switch (type) { | |
3505 | case UNICAST_ADDR: | |
ae9cda5d | 3506 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3507 | for (ifa = idev->addr_list; ifa; |
3508 | ifa = ifa->if_next, ip_idx++) { | |
3509 | if (ip_idx < s_ip_idx) | |
3510 | continue; | |
5d5619b4 YH |
3511 | err = inet6_fill_ifaddr(skb, ifa, |
3512 | NETLINK_CB(cb->skb).pid, | |
3513 | cb->nlh->nlmsg_seq, | |
3514 | RTM_NEWADDR, | |
3515 | NLM_F_MULTI); | |
1da177e4 | 3516 | } |
1da177e4 LT |
3517 | break; |
3518 | case MULTICAST_ADDR: | |
3519 | /* multicast address */ | |
1ab1457c | 3520 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3521 | ifmca = ifmca->next, ip_idx++) { |
3522 | if (ip_idx < s_ip_idx) | |
3523 | continue; | |
5d5619b4 YH |
3524 | err = inet6_fill_ifmcaddr(skb, ifmca, |
3525 | NETLINK_CB(cb->skb).pid, | |
3526 | cb->nlh->nlmsg_seq, | |
3527 | RTM_GETMULTICAST, | |
3528 | NLM_F_MULTI); | |
1da177e4 LT |
3529 | } |
3530 | break; | |
3531 | case ANYCAST_ADDR: | |
3532 | /* anycast address */ | |
3533 | for (ifaca = idev->ac_list; ifaca; | |
3534 | ifaca = ifaca->aca_next, ip_idx++) { | |
3535 | if (ip_idx < s_ip_idx) | |
3536 | continue; | |
5d5619b4 YH |
3537 | err = inet6_fill_ifacaddr(skb, ifaca, |
3538 | NETLINK_CB(cb->skb).pid, | |
3539 | cb->nlh->nlmsg_seq, | |
3540 | RTM_GETANYCAST, | |
3541 | NLM_F_MULTI); | |
1da177e4 LT |
3542 | } |
3543 | break; | |
3544 | default: | |
3545 | break; | |
3546 | } | |
3547 | read_unlock_bh(&idev->lock); | |
3548 | in6_dev_put(idev); | |
5d5619b4 YH |
3549 | |
3550 | if (err <= 0) | |
3551 | break; | |
7562f876 PE |
3552 | cont: |
3553 | idx++; | |
1da177e4 | 3554 | } |
1da177e4 LT |
3555 | cb->args[0] = idx; |
3556 | cb->args[1] = ip_idx; | |
3557 | return skb->len; | |
3558 | } | |
3559 | ||
3560 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3561 | { | |
3562 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3563 | |
1da177e4 LT |
3564 | return inet6_dump_addr(skb, cb, type); |
3565 | } | |
3566 | ||
3567 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3568 | { | |
3569 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3570 | |
1da177e4 LT |
3571 | return inet6_dump_addr(skb, cb, type); |
3572 | } | |
3573 | ||
3574 | ||
3575 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3576 | { | |
3577 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3578 | |
1da177e4 LT |
3579 | return inet6_dump_addr(skb, cb, type); |
3580 | } | |
3581 | ||
1b29fc2c TG |
3582 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3583 | void *arg) | |
6c223828 | 3584 | { |
3b1e0a65 | 3585 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3586 | struct ifaddrmsg *ifm; |
3587 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3588 | struct in6_addr *addr = NULL; |
3589 | struct net_device *dev = NULL; | |
3590 | struct inet6_ifaddr *ifa; | |
3591 | struct sk_buff *skb; | |
6c223828 NT |
3592 | int err; |
3593 | ||
1b29fc2c TG |
3594 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3595 | if (err < 0) | |
3596 | goto errout; | |
3597 | ||
3598 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3599 | if (addr == NULL) { | |
3600 | err = -EINVAL; | |
3601 | goto errout; | |
6c223828 | 3602 | } |
6c223828 | 3603 | |
1b29fc2c | 3604 | ifm = nlmsg_data(nlh); |
6c223828 | 3605 | if (ifm->ifa_index) |
6fda7350 | 3606 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3607 | |
1cab3da6 | 3608 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3609 | err = -EADDRNOTAVAIL; |
3610 | goto errout; | |
3611 | } | |
6c223828 | 3612 | |
0ab6803b | 3613 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3614 | err = -ENOBUFS; |
1b29fc2c | 3615 | goto errout_ifa; |
6c223828 NT |
3616 | } |
3617 | ||
6c223828 NT |
3618 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3619 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3620 | if (err < 0) { |
3621 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3622 | WARN_ON(err == -EMSGSIZE); | |
3623 | kfree_skb(skb); | |
3624 | goto errout_ifa; | |
3625 | } | |
6fda7350 | 3626 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3627 | errout_ifa: |
6c223828 | 3628 | in6_ifa_put(ifa); |
1b29fc2c | 3629 | errout: |
6c223828 | 3630 | return err; |
6c223828 NT |
3631 | } |
3632 | ||
1da177e4 LT |
3633 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3634 | { | |
3635 | struct sk_buff *skb; | |
c346dca1 | 3636 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3637 | int err = -ENOBUFS; |
1da177e4 | 3638 | |
0ab6803b | 3639 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3640 | if (skb == NULL) |
3641 | goto errout; | |
3642 | ||
3643 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3644 | if (err < 0) { |
3645 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3646 | WARN_ON(err == -EMSGSIZE); | |
3647 | kfree_skb(skb); | |
3648 | goto errout; | |
3649 | } | |
6fda7350 | 3650 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5d620266 TG |
3651 | errout: |
3652 | if (err < 0) | |
6fda7350 | 3653 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3654 | } |
3655 | ||
b6f99a21 | 3656 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3657 | __s32 *array, int bytes) |
3658 | { | |
04561c1f TG |
3659 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3660 | ||
1da177e4 LT |
3661 | memset(array, 0, bytes); |
3662 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3663 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3664 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3665 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3666 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3667 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3668 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3669 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3670 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3671 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3672 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3673 | #ifdef CONFIG_IPV6_PRIVACY | |
3674 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3675 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3676 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3677 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3678 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3679 | #endif | |
3680 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3681 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3682 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3683 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3684 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3685 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3686 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3687 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3688 | #endif | |
930d6ff2 | 3689 | #endif |
fbea49e1 | 3690 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3691 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3692 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3693 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3694 | #endif | |
7bc570c8 YH |
3695 | #ifdef CONFIG_IPV6_MROUTE |
3696 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3697 | #endif | |
778d80be | 3698 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3699 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
1da177e4 LT |
3700 | } |
3701 | ||
339bf98f TG |
3702 | static inline size_t inet6_if_nlmsg_size(void) |
3703 | { | |
3704 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3705 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3706 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3707 | + nla_total_size(4) /* IFLA_MTU */ | |
3708 | + nla_total_size(4) /* IFLA_LINK */ | |
3709 | + nla_total_size( /* IFLA_PROTINFO */ | |
3710 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3711 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3712 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3713 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3714 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3715 | ); |
3716 | } | |
c5396a31 | 3717 | |
7f7d9a6b HX |
3718 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3719 | int bytes) | |
3720 | { | |
3721 | int i; | |
3722 | int pad = bytes - sizeof(u64) * items; | |
3723 | BUG_ON(pad < 0); | |
3724 | ||
3725 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3726 | put_unaligned(items, &stats[0]); | |
3727 | for (i = 1; i < items; i++) | |
3728 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3729 | ||
3730 | memset(&stats[items], 0, pad); | |
3731 | } | |
3732 | ||
3733 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3734 | int bytes) | |
3735 | { | |
3736 | switch(attrtype) { | |
3737 | case IFLA_INET6_STATS: | |
3738 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3739 | break; | |
3740 | case IFLA_INET6_ICMP6STATS: | |
3741 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3742 | break; | |
3743 | } | |
3744 | } | |
3745 | ||
1ab1457c | 3746 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3747 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3748 | { |
04561c1f | 3749 | struct net_device *dev = idev->dev; |
bf99f1bd | 3750 | struct nlattr *nla; |
04561c1f TG |
3751 | struct ifinfomsg *hdr; |
3752 | struct nlmsghdr *nlh; | |
3753 | void *protoinfo; | |
3754 | struct ifla_cacheinfo ci; | |
3755 | ||
3756 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3757 | if (nlh == NULL) | |
26932566 | 3758 | return -EMSGSIZE; |
04561c1f TG |
3759 | |
3760 | hdr = nlmsg_data(nlh); | |
3761 | hdr->ifi_family = AF_INET6; | |
3762 | hdr->__ifi_pad = 0; | |
3763 | hdr->ifi_type = dev->type; | |
3764 | hdr->ifi_index = dev->ifindex; | |
3765 | hdr->ifi_flags = dev_get_flags(dev); | |
3766 | hdr->ifi_change = 0; | |
3767 | ||
3768 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3769 | |
3770 | if (dev->addr_len) | |
04561c1f | 3771 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3772 | |
04561c1f | 3773 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3774 | if (dev->ifindex != dev->iflink) |
04561c1f | 3775 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3776 | |
04561c1f TG |
3777 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3778 | if (protoinfo == NULL) | |
3779 | goto nla_put_failure; | |
1da177e4 | 3780 | |
04561c1f | 3781 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3782 | |
1da177e4 LT |
3783 | ci.max_reasm_len = IPV6_MAXPLEN; |
3784 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3785 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3786 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3787 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3788 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3789 | ||
bf99f1bd YH |
3790 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3791 | if (nla == NULL) | |
04561c1f | 3792 | goto nla_put_failure; |
bf99f1bd | 3793 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3794 | |
bf99f1bd YH |
3795 | /* XXX - MC not implemented */ |
3796 | ||
3797 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3798 | if (nla == NULL) | |
3799 | goto nla_put_failure; | |
3800 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3801 | ||
3802 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3803 | if (nla == NULL) | |
3804 | goto nla_put_failure; | |
3805 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3806 | |
04561c1f TG |
3807 | nla_nest_end(skb, protoinfo); |
3808 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3809 | |
04561c1f | 3810 | nla_put_failure: |
26932566 PM |
3811 | nlmsg_cancel(skb, nlh); |
3812 | return -EMSGSIZE; | |
1da177e4 LT |
3813 | } |
3814 | ||
3815 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3816 | { | |
3b1e0a65 | 3817 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3818 | int idx, err; |
3819 | int s_idx = cb->args[0]; | |
3820 | struct net_device *dev; | |
3821 | struct inet6_dev *idev; | |
3822 | ||
3823 | read_lock(&dev_base_lock); | |
7562f876 | 3824 | idx = 0; |
6fda7350 | 3825 | for_each_netdev(net, dev) { |
1da177e4 | 3826 | if (idx < s_idx) |
7562f876 | 3827 | goto cont; |
1da177e4 | 3828 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3829 | goto cont; |
1ab1457c | 3830 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3831 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3832 | in6_dev_put(idev); |
3833 | if (err <= 0) | |
3834 | break; | |
7562f876 PE |
3835 | cont: |
3836 | idx++; | |
1da177e4 LT |
3837 | } |
3838 | read_unlock(&dev_base_lock); | |
3839 | cb->args[0] = idx; | |
3840 | ||
3841 | return skb->len; | |
3842 | } | |
3843 | ||
3844 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3845 | { | |
3846 | struct sk_buff *skb; | |
c346dca1 | 3847 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3848 | int err = -ENOBUFS; |
1ab1457c | 3849 | |
339bf98f | 3850 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3851 | if (skb == NULL) |
3852 | goto errout; | |
3853 | ||
3854 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3855 | if (err < 0) { |
3856 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3857 | WARN_ON(err == -EMSGSIZE); | |
3858 | kfree_skb(skb); | |
3859 | goto errout; | |
3860 | } | |
6fda7350 | 3861 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
8d7a76c9 TG |
3862 | errout: |
3863 | if (err < 0) | |
6fda7350 | 3864 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3865 | } |
3866 | ||
339bf98f TG |
3867 | static inline size_t inet6_prefix_nlmsg_size(void) |
3868 | { | |
3869 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3870 | + nla_total_size(sizeof(struct in6_addr)) | |
3871 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3872 | } | |
c5396a31 | 3873 | |
1da177e4 | 3874 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3875 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3876 | int event, unsigned int flags) | |
1da177e4 | 3877 | { |
6051e2f4 TG |
3878 | struct prefixmsg *pmsg; |
3879 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3880 | struct prefix_cacheinfo ci; |
3881 | ||
6051e2f4 TG |
3882 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3883 | if (nlh == NULL) | |
26932566 | 3884 | return -EMSGSIZE; |
6051e2f4 TG |
3885 | |
3886 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3887 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3888 | pmsg->prefix_pad1 = 0; |
3889 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3890 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3891 | pmsg->prefix_len = pinfo->prefix_len; | |
3892 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3893 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3894 | pmsg->prefix_flags = 0; |
3895 | if (pinfo->onlink) | |
3896 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3897 | if (pinfo->autoconf) | |
3898 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3899 | ||
6051e2f4 | 3900 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3901 | |
3902 | ci.preferred_time = ntohl(pinfo->prefered); | |
3903 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3904 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3905 | |
6051e2f4 | 3906 | return nlmsg_end(skb, nlh); |
1da177e4 | 3907 | |
6051e2f4 | 3908 | nla_put_failure: |
26932566 PM |
3909 | nlmsg_cancel(skb, nlh); |
3910 | return -EMSGSIZE; | |
1da177e4 LT |
3911 | } |
3912 | ||
1ab1457c | 3913 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3914 | struct prefix_info *pinfo) |
3915 | { | |
3916 | struct sk_buff *skb; | |
c346dca1 | 3917 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3918 | int err = -ENOBUFS; |
1da177e4 | 3919 | |
339bf98f | 3920 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3921 | if (skb == NULL) |
3922 | goto errout; | |
3923 | ||
3924 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3925 | if (err < 0) { |
3926 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3927 | WARN_ON(err == -EMSGSIZE); | |
3928 | kfree_skb(skb); | |
3929 | goto errout; | |
3930 | } | |
6fda7350 | 3931 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
8c384bfa TG |
3932 | errout: |
3933 | if (err < 0) | |
6fda7350 | 3934 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3935 | } |
3936 | ||
1da177e4 LT |
3937 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3938 | { | |
3939 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3940 | ||
3941 | switch (event) { | |
3942 | case RTM_NEWADDR: | |
95c385b4 NH |
3943 | /* |
3944 | * If the address was optimistic | |
3945 | * we inserted the route at the start of | |
3946 | * our DAD process, so we don't need | |
3947 | * to do it again | |
3948 | */ | |
3949 | if (!(ifp->rt->rt6i_node)) | |
3950 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3951 | if (ifp->idev->cnf.forwarding) |
3952 | addrconf_join_anycast(ifp); | |
3953 | break; | |
3954 | case RTM_DELADDR: | |
3955 | if (ifp->idev->cnf.forwarding) | |
3956 | addrconf_leave_anycast(ifp); | |
3957 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3958 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3959 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3960 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3961 | break; |
3962 | } | |
3963 | } | |
3964 | ||
3965 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3966 | { | |
8814c4b5 | 3967 | rcu_read_lock_bh(); |
1da177e4 LT |
3968 | if (likely(ifp->idev->dead == 0)) |
3969 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3970 | rcu_read_unlock_bh(); |
1da177e4 LT |
3971 | } |
3972 | ||
3973 | #ifdef CONFIG_SYSCTL | |
3974 | ||
3975 | static | |
3976 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3977 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3978 | { | |
3979 | int *valp = ctl->data; | |
3980 | int val = *valp; | |
3981 | int ret; | |
3982 | ||
3983 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3984 | ||
c8fecf22 | 3985 | if (write) |
b325fddb | 3986 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
1ab1457c | 3987 | return ret; |
1da177e4 LT |
3988 | } |
3989 | ||
1ab1457c | 3990 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3991 | void __user *oldval, |
3992 | size_t __user *oldlenp, | |
1f29bcd7 | 3993 | void __user *newval, size_t newlen) |
1da177e4 LT |
3994 | { |
3995 | int *valp = table->data; | |
c8fecf22 | 3996 | int val = *valp; |
1da177e4 LT |
3997 | int new; |
3998 | ||
3999 | if (!newval || !newlen) | |
4000 | return 0; | |
4001 | if (newlen != sizeof(int)) | |
4002 | return -EINVAL; | |
4003 | if (get_user(new, (int __user *)newval)) | |
4004 | return -EFAULT; | |
4005 | if (new == *valp) | |
4006 | return 0; | |
4007 | if (oldval && oldlenp) { | |
4008 | size_t len; | |
4009 | if (get_user(len, oldlenp)) | |
4010 | return -EFAULT; | |
4011 | if (len) { | |
4012 | if (len > table->maxlen) | |
4013 | len = table->maxlen; | |
4014 | if (copy_to_user(oldval, valp, len)) | |
4015 | return -EFAULT; | |
4016 | if (put_user(len, oldlenp)) | |
4017 | return -EFAULT; | |
4018 | } | |
4019 | } | |
4020 | ||
c8fecf22 | 4021 | *valp = new; |
b325fddb | 4022 | return addrconf_fixup_forwarding(table, valp, val); |
1da177e4 LT |
4023 | } |
4024 | ||
4025 | static struct addrconf_sysctl_table | |
4026 | { | |
4027 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4028 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 4029 | char *dev_name; |
ab32ea5d | 4030 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4031 | .sysctl_header = NULL, |
4032 | .addrconf_vars = { | |
1ab1457c | 4033 | { |
1da177e4 LT |
4034 | .ctl_name = NET_IPV6_FORWARDING, |
4035 | .procname = "forwarding", | |
1ab1457c | 4036 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
4037 | .maxlen = sizeof(int), |
4038 | .mode = 0644, | |
6d9f239a AD |
4039 | .proc_handler = addrconf_sysctl_forward, |
4040 | .strategy = addrconf_sysctl_forward_strategy, | |
1da177e4 LT |
4041 | }, |
4042 | { | |
4043 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
4044 | .procname = "hop_limit", | |
1ab1457c | 4045 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
4046 | .maxlen = sizeof(int), |
4047 | .mode = 0644, | |
4048 | .proc_handler = proc_dointvec, | |
4049 | }, | |
4050 | { | |
4051 | .ctl_name = NET_IPV6_MTU, | |
4052 | .procname = "mtu", | |
4053 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 4054 | .maxlen = sizeof(int), |
1da177e4 | 4055 | .mode = 0644, |
6d9f239a | 4056 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4057 | }, |
4058 | { | |
4059 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
4060 | .procname = "accept_ra", | |
1ab1457c | 4061 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
4062 | .maxlen = sizeof(int), |
4063 | .mode = 0644, | |
6d9f239a | 4064 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4065 | }, |
4066 | { | |
4067 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
4068 | .procname = "accept_redirects", | |
1ab1457c | 4069 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
4070 | .maxlen = sizeof(int), |
4071 | .mode = 0644, | |
6d9f239a | 4072 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4073 | }, |
4074 | { | |
4075 | .ctl_name = NET_IPV6_AUTOCONF, | |
4076 | .procname = "autoconf", | |
1ab1457c | 4077 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
4078 | .maxlen = sizeof(int), |
4079 | .mode = 0644, | |
6d9f239a | 4080 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4081 | }, |
4082 | { | |
4083 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
4084 | .procname = "dad_transmits", | |
1ab1457c | 4085 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
4086 | .maxlen = sizeof(int), |
4087 | .mode = 0644, | |
6d9f239a | 4088 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4089 | }, |
4090 | { | |
4091 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
4092 | .procname = "router_solicitations", | |
1ab1457c | 4093 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
4094 | .maxlen = sizeof(int), |
4095 | .mode = 0644, | |
6d9f239a | 4096 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4097 | }, |
4098 | { | |
4099 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
4100 | .procname = "router_solicitation_interval", | |
1ab1457c | 4101 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
4102 | .maxlen = sizeof(int), |
4103 | .mode = 0644, | |
6d9f239a AD |
4104 | .proc_handler = proc_dointvec_jiffies, |
4105 | .strategy = sysctl_jiffies, | |
1da177e4 LT |
4106 | }, |
4107 | { | |
4108 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
4109 | .procname = "router_solicitation_delay", | |
1ab1457c | 4110 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
4111 | .maxlen = sizeof(int), |
4112 | .mode = 0644, | |
6d9f239a AD |
4113 | .proc_handler = proc_dointvec_jiffies, |
4114 | .strategy = sysctl_jiffies, | |
1da177e4 LT |
4115 | }, |
4116 | { | |
4117 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
4118 | .procname = "force_mld_version", | |
1ab1457c | 4119 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
4120 | .maxlen = sizeof(int), |
4121 | .mode = 0644, | |
6d9f239a | 4122 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4123 | }, |
4124 | #ifdef CONFIG_IPV6_PRIVACY | |
4125 | { | |
4126 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
4127 | .procname = "use_tempaddr", | |
1ab1457c | 4128 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
4129 | .maxlen = sizeof(int), |
4130 | .mode = 0644, | |
6d9f239a | 4131 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4132 | }, |
4133 | { | |
4134 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
4135 | .procname = "temp_valid_lft", | |
1ab1457c | 4136 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
4137 | .maxlen = sizeof(int), |
4138 | .mode = 0644, | |
6d9f239a | 4139 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4140 | }, |
4141 | { | |
4142 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
4143 | .procname = "temp_prefered_lft", | |
1ab1457c | 4144 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4145 | .maxlen = sizeof(int), |
4146 | .mode = 0644, | |
6d9f239a | 4147 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4148 | }, |
4149 | { | |
4150 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
4151 | .procname = "regen_max_retry", | |
1ab1457c | 4152 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4153 | .maxlen = sizeof(int), |
4154 | .mode = 0644, | |
6d9f239a | 4155 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4156 | }, |
4157 | { | |
4158 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
4159 | .procname = "max_desync_factor", | |
1ab1457c | 4160 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4161 | .maxlen = sizeof(int), |
4162 | .mode = 0644, | |
6d9f239a | 4163 | .proc_handler = proc_dointvec, |
1da177e4 LT |
4164 | }, |
4165 | #endif | |
4166 | { | |
4167 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
4168 | .procname = "max_addresses", | |
4169 | .data = &ipv6_devconf.max_addresses, | |
4170 | .maxlen = sizeof(int), | |
4171 | .mode = 0644, | |
6d9f239a | 4172 | .proc_handler = proc_dointvec, |
1da177e4 | 4173 | }, |
65f5c7c1 YH |
4174 | { |
4175 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
4176 | .procname = "accept_ra_defrtr", | |
1ab1457c | 4177 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4178 | .maxlen = sizeof(int), |
4179 | .mode = 0644, | |
6d9f239a | 4180 | .proc_handler = proc_dointvec, |
65f5c7c1 | 4181 | }, |
c4fd30eb YH |
4182 | { |
4183 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
4184 | .procname = "accept_ra_pinfo", | |
1ab1457c | 4185 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4186 | .maxlen = sizeof(int), |
4187 | .mode = 0644, | |
6d9f239a | 4188 | .proc_handler = proc_dointvec, |
c4fd30eb | 4189 | }, |
930d6ff2 YH |
4190 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4191 | { | |
4192 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
4193 | .procname = "accept_ra_rtr_pref", | |
4194 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4195 | .maxlen = sizeof(int), | |
4196 | .mode = 0644, | |
6d9f239a | 4197 | .proc_handler = proc_dointvec, |
930d6ff2 | 4198 | }, |
52e16356 YH |
4199 | { |
4200 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
4201 | .procname = "router_probe_interval", | |
4202 | .data = &ipv6_devconf.rtr_probe_interval, | |
4203 | .maxlen = sizeof(int), | |
4204 | .mode = 0644, | |
6d9f239a AD |
4205 | .proc_handler = proc_dointvec_jiffies, |
4206 | .strategy = sysctl_jiffies, | |
52e16356 | 4207 | }, |
fa03ef38 | 4208 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4209 | { |
4210 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4211 | .procname = "accept_ra_rt_info_max_plen", | |
4212 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4213 | .maxlen = sizeof(int), | |
4214 | .mode = 0644, | |
6d9f239a | 4215 | .proc_handler = proc_dointvec, |
09c884d4 YH |
4216 | }, |
4217 | #endif | |
930d6ff2 | 4218 | #endif |
fbea49e1 YH |
4219 | { |
4220 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4221 | .procname = "proxy_ndp", | |
4222 | .data = &ipv6_devconf.proxy_ndp, | |
4223 | .maxlen = sizeof(int), | |
4224 | .mode = 0644, | |
6d9f239a | 4225 | .proc_handler = proc_dointvec, |
fbea49e1 | 4226 | }, |
0bcbc926 YH |
4227 | { |
4228 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4229 | .procname = "accept_source_route", | |
4230 | .data = &ipv6_devconf.accept_source_route, | |
4231 | .maxlen = sizeof(int), | |
4232 | .mode = 0644, | |
6d9f239a | 4233 | .proc_handler = proc_dointvec, |
0bcbc926 | 4234 | }, |
95c385b4 NH |
4235 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4236 | { | |
4237 | .ctl_name = CTL_UNNUMBERED, | |
4238 | .procname = "optimistic_dad", | |
4239 | .data = &ipv6_devconf.optimistic_dad, | |
4240 | .maxlen = sizeof(int), | |
4241 | .mode = 0644, | |
6d9f239a | 4242 | .proc_handler = proc_dointvec, |
95c385b4 NH |
4243 | |
4244 | }, | |
7bc570c8 YH |
4245 | #endif |
4246 | #ifdef CONFIG_IPV6_MROUTE | |
4247 | { | |
4248 | .ctl_name = CTL_UNNUMBERED, | |
4249 | .procname = "mc_forwarding", | |
4250 | .data = &ipv6_devconf.mc_forwarding, | |
4251 | .maxlen = sizeof(int), | |
a4e6db07 | 4252 | .mode = 0444, |
6d9f239a | 4253 | .proc_handler = proc_dointvec, |
7bc570c8 | 4254 | }, |
95c385b4 | 4255 | #endif |
778d80be YH |
4256 | { |
4257 | .ctl_name = CTL_UNNUMBERED, | |
4258 | .procname = "disable_ipv6", | |
4259 | .data = &ipv6_devconf.disable_ipv6, | |
4260 | .maxlen = sizeof(int), | |
4261 | .mode = 0644, | |
6d9f239a | 4262 | .proc_handler = proc_dointvec, |
778d80be | 4263 | }, |
1b34be74 YH |
4264 | { |
4265 | .ctl_name = CTL_UNNUMBERED, | |
4266 | .procname = "accept_dad", | |
4267 | .data = &ipv6_devconf.accept_dad, | |
4268 | .maxlen = sizeof(int), | |
4269 | .mode = 0644, | |
6d9f239a | 4270 | .proc_handler = proc_dointvec, |
1b34be74 | 4271 | }, |
1da177e4 LT |
4272 | { |
4273 | .ctl_name = 0, /* sentinel */ | |
4274 | } | |
4275 | }, | |
1da177e4 LT |
4276 | }; |
4277 | ||
bff16c2f PE |
4278 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4279 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4280 | { |
4281 | int i; | |
1da177e4 | 4282 | struct addrconf_sysctl_table *t; |
1da177e4 | 4283 | |
1dab6222 PE |
4284 | #define ADDRCONF_CTL_PATH_DEV 3 |
4285 | ||
4286 | struct ctl_path addrconf_ctl_path[] = { | |
4287 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4288 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4289 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4290 | { /* to be set */ }, | |
4291 | { }, | |
4292 | }; | |
4293 | ||
4294 | ||
af879cc7 | 4295 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4296 | if (t == NULL) |
f68635e6 PE |
4297 | goto out; |
4298 | ||
1da177e4 LT |
4299 | for (i=0; t->addrconf_vars[i].data; i++) { |
4300 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4301 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4302 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4303 | } |
1da177e4 | 4304 | |
1ab1457c YH |
4305 | /* |
4306 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4307 | * by sysctl and we wouldn't want anyone to change it under our feet |
4308 | * (see SIOCSIFNAME). | |
1ab1457c | 4309 | */ |
1dab6222 PE |
4310 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4311 | if (!t->dev_name) | |
f68635e6 | 4312 | goto free; |
1da177e4 | 4313 | |
1dab6222 PE |
4314 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4315 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4316 | |
bff16c2f | 4317 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4318 | t->addrconf_vars); |
1da177e4 LT |
4319 | if (t->sysctl_header == NULL) |
4320 | goto free_procname; | |
f68635e6 PE |
4321 | |
4322 | p->sysctl = t; | |
95897312 | 4323 | return 0; |
1da177e4 | 4324 | |
f68635e6 | 4325 | free_procname: |
1dab6222 | 4326 | kfree(t->dev_name); |
f68635e6 | 4327 | free: |
1da177e4 | 4328 | kfree(t); |
f68635e6 | 4329 | out: |
95897312 | 4330 | return -ENOBUFS; |
1da177e4 LT |
4331 | } |
4332 | ||
408c4768 PE |
4333 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4334 | { | |
4335 | struct addrconf_sysctl_table *t; | |
4336 | ||
4337 | if (p->sysctl == NULL) | |
4338 | return; | |
4339 | ||
4340 | t = p->sysctl; | |
4341 | p->sysctl = NULL; | |
4342 | unregister_sysctl_table(t->sysctl_header); | |
4343 | kfree(t->dev_name); | |
4344 | kfree(t); | |
4345 | } | |
4346 | ||
f52295a9 PE |
4347 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4348 | { | |
408c4768 PE |
4349 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4350 | NET_IPV6_NEIGH, "ipv6", | |
4351 | &ndisc_ifinfo_sysctl_change, | |
0686caa3 | 4352 | ndisc_ifinfo_sysctl_strategy); |
c346dca1 | 4353 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
bff16c2f | 4354 | idev->dev->ifindex, idev, &idev->cnf); |
f52295a9 PE |
4355 | } |
4356 | ||
408c4768 | 4357 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4358 | { |
408c4768 PE |
4359 | __addrconf_sysctl_unregister(&idev->cnf); |
4360 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4361 | } |
4362 | ||
4363 | ||
4364 | #endif | |
4365 | ||
e0da5a48 PE |
4366 | static int addrconf_init_net(struct net *net) |
4367 | { | |
4368 | int err; | |
4369 | struct ipv6_devconf *all, *dflt; | |
4370 | ||
4371 | err = -ENOMEM; | |
4372 | all = &ipv6_devconf; | |
4373 | dflt = &ipv6_devconf_dflt; | |
4374 | ||
4375 | if (net != &init_net) { | |
4376 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); | |
4377 | if (all == NULL) | |
4378 | goto err_alloc_all; | |
4379 | ||
4380 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4381 | if (dflt == NULL) | |
4382 | goto err_alloc_dflt; | |
4383 | } | |
4384 | ||
4385 | net->ipv6.devconf_all = all; | |
4386 | net->ipv6.devconf_dflt = dflt; | |
4387 | ||
4388 | #ifdef CONFIG_SYSCTL | |
4389 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, | |
4390 | NULL, all); | |
4391 | if (err < 0) | |
4392 | goto err_reg_all; | |
4393 | ||
4394 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, | |
4395 | NULL, dflt); | |
4396 | if (err < 0) | |
4397 | goto err_reg_dflt; | |
4398 | #endif | |
4399 | return 0; | |
4400 | ||
4401 | #ifdef CONFIG_SYSCTL | |
4402 | err_reg_dflt: | |
4403 | __addrconf_sysctl_unregister(all); | |
4404 | err_reg_all: | |
4405 | kfree(dflt); | |
4406 | #endif | |
4407 | err_alloc_dflt: | |
4408 | kfree(all); | |
4409 | err_alloc_all: | |
4410 | return err; | |
4411 | } | |
4412 | ||
4413 | static void addrconf_exit_net(struct net *net) | |
4414 | { | |
4415 | #ifdef CONFIG_SYSCTL | |
4416 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4417 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4418 | #endif | |
4419 | if (net != &init_net) { | |
4420 | kfree(net->ipv6.devconf_dflt); | |
4421 | kfree(net->ipv6.devconf_all); | |
4422 | } | |
4423 | } | |
4424 | ||
4425 | static struct pernet_operations addrconf_ops = { | |
4426 | .init = addrconf_init_net, | |
4427 | .exit = addrconf_exit_net, | |
4428 | }; | |
4429 | ||
1da177e4 LT |
4430 | /* |
4431 | * Device notifier | |
4432 | */ | |
4433 | ||
4434 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4435 | { | |
1ab1457c | 4436 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4437 | } |
4438 | ||
7159039a YH |
4439 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4440 | ||
1da177e4 LT |
4441 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4442 | { | |
1ab1457c | 4443 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4444 | } |
4445 | ||
7159039a YH |
4446 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4447 | ||
1da177e4 LT |
4448 | /* |
4449 | * Init / cleanup code | |
4450 | */ | |
4451 | ||
4452 | int __init addrconf_init(void) | |
4453 | { | |
2a8cc6c8 YH |
4454 | int err; |
4455 | ||
4456 | if ((err = ipv6_addr_label_init()) < 0) { | |
4457 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4458 | err); | |
4459 | return err; | |
4460 | } | |
1da177e4 | 4461 | |
e0da5a48 PE |
4462 | register_pernet_subsys(&addrconf_ops); |
4463 | ||
1da177e4 LT |
4464 | /* The addrconf netdev notifier requires that loopback_dev |
4465 | * has it's ipv6 private information allocated and setup | |
4466 | * before it can bring up and give link-local addresses | |
4467 | * to other devices which are up. | |
4468 | * | |
4469 | * Unfortunately, loopback_dev is not necessarily the first | |
4470 | * entry in the global dev_base list of net devices. In fact, | |
4471 | * it is likely to be the very last entry on that list. | |
4472 | * So this causes the notifier registry below to try and | |
4473 | * give link-local addresses to all devices besides loopback_dev | |
4474 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4475 | * devices to fail to get a link-local address. | |
4476 | * | |
4477 | * So, as a temporary fix, allocate the ipv6 structure for | |
4478 | * loopback_dev first by hand. | |
4479 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4480 | * device and it being up should be removed. | |
4481 | */ | |
4482 | rtnl_lock(); | |
2774c7ab | 4483 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4484 | err = -ENOMEM; |
4485 | rtnl_unlock(); | |
4486 | if (err) | |
e0da5a48 | 4487 | goto errlo; |
1da177e4 LT |
4488 | |
4489 | register_netdevice_notifier(&ipv6_dev_notf); | |
4490 | ||
1da177e4 | 4491 | addrconf_verify(0); |
c127ea2c TG |
4492 | |
4493 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4494 | if (err < 0) | |
4495 | goto errout; | |
4496 | ||
4497 | /* Only the first call to __rtnl_register can fail */ | |
4498 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4499 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4500 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4501 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4502 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4503 | ||
2a8cc6c8 YH |
4504 | ipv6_addr_label_rtnl_register(); |
4505 | ||
1da177e4 | 4506 | return 0; |
c127ea2c TG |
4507 | errout: |
4508 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4509 | errlo: |
4510 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4511 | |
4512 | return err; | |
1da177e4 LT |
4513 | } |
4514 | ||
09f7709f | 4515 | void addrconf_cleanup(void) |
1da177e4 | 4516 | { |
1ab1457c | 4517 | struct inet6_ifaddr *ifa; |
176c39af | 4518 | struct net_device *dev; |
1da177e4 LT |
4519 | int i; |
4520 | ||
4521 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4522 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4523 | |
4524 | rtnl_lock(); | |
4525 | ||
176c39af DL |
4526 | /* clean dev list */ |
4527 | for_each_netdev(&init_net, dev) { | |
4528 | if (__in6_dev_get(dev) == NULL) | |
4529 | continue; | |
4530 | addrconf_ifdown(dev, 1); | |
4531 | } | |
4532 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4533 | ||
1da177e4 LT |
4534 | /* |
4535 | * Check hash table. | |
4536 | */ | |
1da177e4 LT |
4537 | write_lock_bh(&addrconf_hash_lock); |
4538 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4539 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4540 | struct inet6_ifaddr *bifa; | |
4541 | ||
4542 | bifa = ifa; | |
4543 | ifa = ifa->lst_next; | |
4544 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4545 | /* Do not free it; something is wrong. | |
4546 | Now we can investigate it with debugger. | |
4547 | */ | |
4548 | } | |
4549 | } | |
4550 | write_unlock_bh(&addrconf_hash_lock); | |
4551 | ||
4552 | del_timer(&addr_chk_timer); | |
1da177e4 | 4553 | rtnl_unlock(); |
1da177e4 | 4554 | } |