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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
1da177e4 LT |
47 | #include <linux/net.h> |
48 | #include <linux/in6.h> | |
49 | #include <linux/netdevice.h> | |
1823730f | 50 | #include <linux/if_addr.h> |
1da177e4 LT |
51 | #include <linux/if_arp.h> |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 | 64 | |
457c4cbc | 65 | #include <net/net_namespace.h> |
1da177e4 LT |
66 | #include <net/sock.h> |
67 | #include <net/snmp.h> | |
68 | ||
69 | #include <net/ipv6.h> | |
70 | #include <net/protocol.h> | |
71 | #include <net/ndisc.h> | |
72 | #include <net/ip6_route.h> | |
73 | #include <net/addrconf.h> | |
74 | #include <net/tcp.h> | |
75 | #include <net/ip.h> | |
5d620266 | 76 | #include <net/netlink.h> |
f24e3d65 | 77 | #include <net/pkt_sched.h> |
1da177e4 LT |
78 | #include <linux/if_tunnel.h> |
79 | #include <linux/rtnetlink.h> | |
80 | ||
81 | #ifdef CONFIG_IPV6_PRIVACY | |
82 | #include <linux/random.h> | |
1da177e4 LT |
83 | #endif |
84 | ||
85 | #include <asm/uaccess.h> | |
7f7d9a6b | 86 | #include <asm/unaligned.h> |
1da177e4 LT |
87 | |
88 | #include <linux/proc_fs.h> | |
89 | #include <linux/seq_file.h> | |
90 | ||
91 | /* Set to 3 to get tracing... */ | |
92 | #define ACONF_DEBUG 2 | |
93 | ||
94 | #if ACONF_DEBUG >= 3 | |
95 | #define ADBG(x) printk x | |
96 | #else | |
97 | #define ADBG(x) | |
98 | #endif | |
99 | ||
100 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
101 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
102 | ||
103 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 104 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
105 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
106 | #else | |
107 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
108 | { | |
109 | } | |
110 | ||
111 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
112 | { | |
113 | } | |
1da177e4 LT |
114 | #endif |
115 | ||
116 | #ifdef CONFIG_IPV6_PRIVACY | |
117 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 118 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
119 | static void ipv6_regen_rndid(unsigned long data); |
120 | ||
121 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
122 | #endif |
123 | ||
124 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
125 | ||
126 | /* | |
127 | * Configured unicast address hash table | |
128 | */ | |
129 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
130 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
131 | ||
1da177e4 LT |
132 | static void addrconf_verify(unsigned long); |
133 | ||
8d06afab | 134 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
135 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
136 | ||
137 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
138 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
139 | ||
140 | static int addrconf_ifdown(struct net_device *dev, int how); | |
141 | ||
e431b8c0 | 142 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
143 | static void addrconf_dad_timer(unsigned long data); |
144 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 145 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
146 | static void addrconf_rs_timer(unsigned long data); |
147 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
148 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
149 | ||
1ab1457c | 150 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 151 | struct prefix_info *pinfo); |
06bfe655 DL |
152 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
153 | struct net_device *dev); | |
1da177e4 | 154 | |
e041c683 | 155 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 156 | |
ab32ea5d | 157 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
158 | .forwarding = 0, |
159 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
160 | .mtu6 = IPV6_MIN_MTU, | |
161 | .accept_ra = 1, | |
162 | .accept_redirects = 1, | |
163 | .autoconf = 1, | |
164 | .force_mld_version = 0, | |
165 | .dad_transmits = 1, | |
166 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
167 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
168 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
169 | #ifdef CONFIG_IPV6_PRIVACY | |
170 | .use_tempaddr = 0, | |
171 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
172 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
173 | .regen_max_retry = REGEN_MAX_RETRY, | |
174 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
175 | #endif | |
176 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 177 | .accept_ra_defrtr = 1, |
c4fd30eb | 178 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
179 | #ifdef CONFIG_IPV6_ROUTER_PREF |
180 | .accept_ra_rtr_pref = 1, | |
52e16356 | 181 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
182 | #ifdef CONFIG_IPV6_ROUTE_INFO |
183 | .accept_ra_rt_info_max_plen = 0, | |
184 | #endif | |
930d6ff2 | 185 | #endif |
fbea49e1 | 186 | .proxy_ndp = 0, |
0bcbc926 | 187 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
188 | }; |
189 | ||
ab32ea5d | 190 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
191 | .forwarding = 0, |
192 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
193 | .mtu6 = IPV6_MIN_MTU, | |
194 | .accept_ra = 1, | |
195 | .accept_redirects = 1, | |
196 | .autoconf = 1, | |
197 | .dad_transmits = 1, | |
198 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
199 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
200 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
201 | #ifdef CONFIG_IPV6_PRIVACY | |
202 | .use_tempaddr = 0, | |
203 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
204 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
205 | .regen_max_retry = REGEN_MAX_RETRY, | |
206 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
207 | #endif | |
208 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 209 | .accept_ra_defrtr = 1, |
c4fd30eb | 210 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
211 | #ifdef CONFIG_IPV6_ROUTER_PREF |
212 | .accept_ra_rtr_pref = 1, | |
52e16356 | 213 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
214 | #ifdef CONFIG_IPV6_ROUTE_INFO |
215 | .accept_ra_rt_info_max_plen = 0, | |
216 | #endif | |
930d6ff2 | 217 | #endif |
fbea49e1 | 218 | .proxy_ndp = 0, |
0bcbc926 | 219 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
220 | }; |
221 | ||
222 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 223 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 224 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
225 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
226 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 227 | |
f24e3d65 MC |
228 | /* Check if a valid qdisc is available */ |
229 | static inline int addrconf_qdisc_ok(struct net_device *dev) | |
230 | { | |
231 | return (dev->qdisc != &noop_qdisc); | |
232 | } | |
233 | ||
1da177e4 LT |
234 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
235 | { | |
236 | if (del_timer(&ifp->timer)) | |
237 | __in6_ifa_put(ifp); | |
238 | } | |
239 | ||
240 | enum addrconf_timer_t | |
241 | { | |
242 | AC_NONE, | |
243 | AC_DAD, | |
244 | AC_RS, | |
245 | }; | |
246 | ||
247 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
248 | enum addrconf_timer_t what, | |
249 | unsigned long when) | |
250 | { | |
251 | if (!del_timer(&ifp->timer)) | |
252 | in6_ifa_hold(ifp); | |
253 | ||
254 | switch (what) { | |
255 | case AC_DAD: | |
256 | ifp->timer.function = addrconf_dad_timer; | |
257 | break; | |
258 | case AC_RS: | |
259 | ifp->timer.function = addrconf_rs_timer; | |
260 | break; | |
261 | default:; | |
262 | } | |
263 | ifp->timer.expires = jiffies + when; | |
264 | add_timer(&ifp->timer); | |
265 | } | |
266 | ||
7f7d9a6b HX |
267 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
268 | { | |
7f7d9a6b | 269 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 270 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
271 | goto err_ip; |
272 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 273 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 274 | goto err_icmp; |
14878f75 | 275 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 276 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 277 | goto err_icmpmsg; |
7f7d9a6b HX |
278 | |
279 | return 0; | |
280 | ||
14878f75 DS |
281 | err_icmpmsg: |
282 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
283 | err_icmp: |
284 | snmp_mib_free((void **)idev->stats.ipv6); | |
285 | err_ip: | |
aaf70ec7 | 286 | return -ENOMEM; |
7f7d9a6b HX |
287 | } |
288 | ||
16910b98 | 289 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 290 | { |
14878f75 | 291 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
292 | snmp_mib_free((void **)idev->stats.icmpv6); |
293 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
294 | } |
295 | ||
1da177e4 LT |
296 | /* Nobody refers to this device, we may destroy it. */ |
297 | ||
8814c4b5 YH |
298 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
299 | { | |
300 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
301 | kfree(idev); | |
302 | } | |
303 | ||
1da177e4 LT |
304 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
305 | { | |
306 | struct net_device *dev = idev->dev; | |
307 | BUG_TRAP(idev->addr_list==NULL); | |
308 | BUG_TRAP(idev->mc_list==NULL); | |
309 | #ifdef NET_REFCNT_DEBUG | |
310 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
311 | #endif | |
312 | dev_put(dev); | |
313 | if (!idev->dead) { | |
314 | printk("Freeing alive inet6 device %p\n", idev); | |
315 | return; | |
316 | } | |
317 | snmp6_free_dev(idev); | |
8814c4b5 | 318 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
319 | } |
320 | ||
7159039a YH |
321 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
322 | ||
1da177e4 LT |
323 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
324 | { | |
325 | struct inet6_dev *ndev; | |
326 | ||
327 | ASSERT_RTNL(); | |
328 | ||
329 | if (dev->mtu < IPV6_MIN_MTU) | |
330 | return NULL; | |
331 | ||
1ab1457c | 332 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 333 | |
1ab1457c YH |
334 | if (ndev == NULL) |
335 | return NULL; | |
322f74a4 IO |
336 | |
337 | rwlock_init(&ndev->lock); | |
338 | ndev->dev = dev; | |
c346dca1 | 339 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
340 | ndev->cnf.mtu6 = dev->mtu; |
341 | ndev->cnf.sysctl = NULL; | |
342 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
343 | if (ndev->nd_parms == NULL) { | |
344 | kfree(ndev); | |
345 | return NULL; | |
346 | } | |
347 | /* We refer to the device */ | |
348 | dev_hold(dev); | |
1da177e4 | 349 | |
322f74a4 IO |
350 | if (snmp6_alloc_dev(ndev) < 0) { |
351 | ADBG((KERN_WARNING | |
352 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 353 | __func__, dev->name)); |
322f74a4 IO |
354 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
355 | ndev->dead = 1; | |
356 | in6_dev_finish_destroy(ndev); | |
357 | return NULL; | |
358 | } | |
1da177e4 | 359 | |
322f74a4 IO |
360 | if (snmp6_register_dev(ndev) < 0) { |
361 | ADBG((KERN_WARNING | |
362 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 363 | __func__, dev->name)); |
322f74a4 IO |
364 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
365 | ndev->dead = 1; | |
366 | in6_dev_finish_destroy(ndev); | |
367 | return NULL; | |
368 | } | |
369 | ||
370 | /* One reference from device. We must do this before | |
371 | * we invoke __ipv6_regen_rndid(). | |
372 | */ | |
373 | in6_dev_hold(ndev); | |
1da177e4 | 374 | |
b077d7ab YH |
375 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
376 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
377 | printk(KERN_INFO | |
378 | "%s: Disabled Multicast RS\n", | |
379 | dev->name); | |
380 | ndev->cnf.rtr_solicits = 0; | |
381 | } | |
382 | #endif | |
383 | ||
1da177e4 | 384 | #ifdef CONFIG_IPV6_PRIVACY |
b24b8a24 | 385 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
386 | if ((dev->flags&IFF_LOOPBACK) || |
387 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 388 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 389 | dev->type == ARPHRD_SIT || |
0be669bb | 390 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
391 | printk(KERN_INFO |
392 | "%s: Disabled Privacy Extensions\n", | |
393 | dev->name); | |
394 | ndev->cnf.use_tempaddr = -1; | |
395 | } else { | |
396 | in6_dev_hold(ndev); | |
397 | ipv6_regen_rndid((unsigned long) ndev); | |
398 | } | |
1da177e4 LT |
399 | #endif |
400 | ||
f24e3d65 | 401 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
402 | ndev->if_flags |= IF_READY; |
403 | ||
322f74a4 IO |
404 | ipv6_mc_init_dev(ndev); |
405 | ndev->tstamp = jiffies; | |
f52295a9 | 406 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
407 | /* protected by rtnl_lock */ |
408 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
409 | |
410 | /* Join all-node multicast group */ | |
f3ee4010 | 411 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 412 | |
1da177e4 LT |
413 | return ndev; |
414 | } | |
415 | ||
cee89473 | 416 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
417 | { |
418 | struct inet6_dev *idev; | |
419 | ||
420 | ASSERT_RTNL(); | |
421 | ||
422 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
423 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
424 | return NULL; | |
425 | } | |
c5e33bdd | 426 | |
1da177e4 LT |
427 | if (dev->flags&IFF_UP) |
428 | ipv6_mc_up(idev); | |
429 | return idev; | |
430 | } | |
431 | ||
432 | #ifdef CONFIG_SYSCTL | |
433 | static void dev_forward_change(struct inet6_dev *idev) | |
434 | { | |
435 | struct net_device *dev; | |
436 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
437 | |
438 | if (!idev) | |
439 | return; | |
440 | dev = idev->dev; | |
441 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
1da177e4 | 442 | if (idev->cnf.forwarding) |
f3ee4010 | 443 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 444 | else |
f3ee4010 | 445 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 LT |
446 | } |
447 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
448 | if (ifa->flags&IFA_F_TENTATIVE) |
449 | continue; | |
1da177e4 LT |
450 | if (idev->cnf.forwarding) |
451 | addrconf_join_anycast(ifa); | |
452 | else | |
453 | addrconf_leave_anycast(ifa); | |
454 | } | |
455 | } | |
456 | ||
457 | ||
e186932b | 458 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
459 | { |
460 | struct net_device *dev; | |
461 | struct inet6_dev *idev; | |
462 | ||
463 | read_lock(&dev_base_lock); | |
bff16c2f | 464 | for_each_netdev(net, dev) { |
8814c4b5 | 465 | rcu_read_lock(); |
1da177e4 LT |
466 | idev = __in6_dev_get(dev); |
467 | if (idev) { | |
e186932b PE |
468 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
469 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
470 | if (changed) |
471 | dev_forward_change(idev); | |
472 | } | |
8814c4b5 | 473 | rcu_read_unlock(); |
1da177e4 LT |
474 | } |
475 | read_unlock(&dev_base_lock); | |
476 | } | |
c8fecf22 PE |
477 | |
478 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) | |
479 | { | |
bff16c2f PE |
480 | struct net *net; |
481 | ||
482 | net = (struct net *)table->extra2; | |
441fc2a2 | 483 | if (p == &net->ipv6.devconf_dflt->forwarding) |
c8fecf22 PE |
484 | return; |
485 | ||
e186932b PE |
486 | if (p == &net->ipv6.devconf_all->forwarding) { |
487 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
488 | net->ipv6.devconf_dflt->forwarding = newf; | |
489 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
490 | } else if ((!*p) ^ (!old)) |
491 | dev_forward_change((struct inet6_dev *)table->extra1); | |
492 | ||
493 | if (*p) | |
7b4da532 | 494 | rt6_purge_dflt_routers(net); |
c8fecf22 | 495 | } |
1da177e4 LT |
496 | #endif |
497 | ||
498 | /* Nobody refers to this ifaddr, destroy it */ | |
499 | ||
500 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
501 | { | |
502 | BUG_TRAP(ifp->if_next==NULL); | |
503 | BUG_TRAP(ifp->lst_next==NULL); | |
504 | #ifdef NET_REFCNT_DEBUG | |
505 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
506 | #endif | |
507 | ||
508 | in6_dev_put(ifp->idev); | |
509 | ||
510 | if (del_timer(&ifp->timer)) | |
511 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
512 | ||
513 | if (!ifp->dead) { | |
514 | printk("Freeing alive inet6 address %p\n", ifp); | |
515 | return; | |
516 | } | |
517 | dst_release(&ifp->rt->u.dst); | |
518 | ||
519 | kfree(ifp); | |
520 | } | |
521 | ||
e55ffac6 BH |
522 | static void |
523 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
524 | { | |
525 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 526 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
527 | |
528 | /* | |
529 | * Each device address list is sorted in order of scope - | |
530 | * global before linklocal. | |
531 | */ | |
532 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
533 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 534 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
535 | break; |
536 | } | |
537 | ||
538 | ifp->if_next = *ifap; | |
539 | *ifap = ifp; | |
540 | } | |
541 | ||
3eb84f49 YH |
542 | /* |
543 | * Hash function taken from net_alias.c | |
544 | */ | |
545 | static u8 ipv6_addr_hash(const struct in6_addr *addr) | |
546 | { | |
547 | __u32 word; | |
548 | ||
549 | /* | |
550 | * We perform the hash function over the last 64 bits of the address | |
551 | * This will include the IEEE address token on links that support it. | |
552 | */ | |
553 | ||
554 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); | |
555 | word ^= (word >> 16); | |
556 | word ^= (word >> 8); | |
557 | ||
558 | return ((word ^ (word >> 4)) & 0x0f); | |
559 | } | |
560 | ||
1da177e4 LT |
561 | /* On success it returns ifp with increased reference count */ |
562 | ||
563 | static struct inet6_ifaddr * | |
564 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 565 | int scope, u32 flags) |
1da177e4 LT |
566 | { |
567 | struct inet6_ifaddr *ifa = NULL; | |
568 | struct rt6_info *rt; | |
569 | int hash; | |
570 | int err = 0; | |
571 | ||
8814c4b5 | 572 | rcu_read_lock_bh(); |
1da177e4 LT |
573 | if (idev->dead) { |
574 | err = -ENODEV; /*XXX*/ | |
575 | goto out2; | |
576 | } | |
577 | ||
578 | write_lock(&addrconf_hash_lock); | |
579 | ||
580 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 581 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
582 | ADBG(("ipv6_add_addr: already assigned\n")); |
583 | err = -EEXIST; | |
584 | goto out; | |
585 | } | |
586 | ||
322f74a4 | 587 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
588 | |
589 | if (ifa == NULL) { | |
590 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
591 | err = -ENOBUFS; | |
592 | goto out; | |
593 | } | |
594 | ||
595 | rt = addrconf_dst_alloc(idev, addr, 0); | |
596 | if (IS_ERR(rt)) { | |
597 | err = PTR_ERR(rt); | |
598 | goto out; | |
599 | } | |
600 | ||
1da177e4 LT |
601 | ipv6_addr_copy(&ifa->addr, addr); |
602 | ||
603 | spin_lock_init(&ifa->lock); | |
604 | init_timer(&ifa->timer); | |
605 | ifa->timer.data = (unsigned long) ifa; | |
606 | ifa->scope = scope; | |
607 | ifa->prefix_len = pfxlen; | |
608 | ifa->flags = flags | IFA_F_TENTATIVE; | |
609 | ifa->cstamp = ifa->tstamp = jiffies; | |
610 | ||
57f5f544 KF |
611 | ifa->rt = rt; |
612 | ||
95c385b4 NH |
613 | /* |
614 | * part one of RFC 4429, section 3.3 | |
615 | * We should not configure an address as | |
616 | * optimistic if we do not yet know the link | |
617 | * layer address of our nexhop router | |
618 | */ | |
619 | ||
620 | if (rt->rt6i_nexthop == NULL) | |
621 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
622 | ||
1da177e4 LT |
623 | ifa->idev = idev; |
624 | in6_dev_hold(idev); | |
625 | /* For caller */ | |
626 | in6_ifa_hold(ifa); | |
627 | ||
628 | /* Add to big hash table */ | |
629 | hash = ipv6_addr_hash(addr); | |
630 | ||
631 | ifa->lst_next = inet6_addr_lst[hash]; | |
632 | inet6_addr_lst[hash] = ifa; | |
633 | in6_ifa_hold(ifa); | |
634 | write_unlock(&addrconf_hash_lock); | |
635 | ||
636 | write_lock(&idev->lock); | |
637 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 638 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
639 | |
640 | #ifdef CONFIG_IPV6_PRIVACY | |
641 | if (ifa->flags&IFA_F_TEMPORARY) { | |
642 | ifa->tmp_next = idev->tempaddr_list; | |
643 | idev->tempaddr_list = ifa; | |
644 | in6_ifa_hold(ifa); | |
645 | } | |
646 | #endif | |
647 | ||
1da177e4 LT |
648 | in6_ifa_hold(ifa); |
649 | write_unlock(&idev->lock); | |
650 | out2: | |
8814c4b5 | 651 | rcu_read_unlock_bh(); |
1da177e4 | 652 | |
fd92833a | 653 | if (likely(err == 0)) |
e041c683 | 654 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
655 | else { |
656 | kfree(ifa); | |
657 | ifa = ERR_PTR(err); | |
658 | } | |
659 | ||
660 | return ifa; | |
661 | out: | |
662 | write_unlock(&addrconf_hash_lock); | |
663 | goto out2; | |
664 | } | |
665 | ||
666 | /* This function wants to get referenced ifp and releases it before return */ | |
667 | ||
668 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
669 | { | |
670 | struct inet6_ifaddr *ifa, **ifap; | |
671 | struct inet6_dev *idev = ifp->idev; | |
672 | int hash; | |
673 | int deleted = 0, onlink = 0; | |
674 | unsigned long expires = jiffies; | |
675 | ||
676 | hash = ipv6_addr_hash(&ifp->addr); | |
677 | ||
678 | ifp->dead = 1; | |
679 | ||
680 | write_lock_bh(&addrconf_hash_lock); | |
681 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
682 | ifap = &ifa->lst_next) { | |
683 | if (ifa == ifp) { | |
684 | *ifap = ifa->lst_next; | |
685 | __in6_ifa_put(ifp); | |
686 | ifa->lst_next = NULL; | |
687 | break; | |
688 | } | |
689 | } | |
690 | write_unlock_bh(&addrconf_hash_lock); | |
691 | ||
692 | write_lock_bh(&idev->lock); | |
693 | #ifdef CONFIG_IPV6_PRIVACY | |
694 | if (ifp->flags&IFA_F_TEMPORARY) { | |
695 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
696 | ifap = &ifa->tmp_next) { | |
697 | if (ifa == ifp) { | |
698 | *ifap = ifa->tmp_next; | |
699 | if (ifp->ifpub) { | |
700 | in6_ifa_put(ifp->ifpub); | |
701 | ifp->ifpub = NULL; | |
702 | } | |
703 | __in6_ifa_put(ifp); | |
704 | ifa->tmp_next = NULL; | |
705 | break; | |
706 | } | |
707 | } | |
708 | } | |
709 | #endif | |
710 | ||
1d142804 | 711 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
712 | if (ifa == ifp) { |
713 | *ifap = ifa->if_next; | |
714 | __in6_ifa_put(ifp); | |
715 | ifa->if_next = NULL; | |
716 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
717 | break; | |
718 | deleted = 1; | |
1d142804 | 719 | continue; |
1da177e4 LT |
720 | } else if (ifp->flags & IFA_F_PERMANENT) { |
721 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
722 | ifp->prefix_len)) { | |
723 | if (ifa->flags & IFA_F_PERMANENT) { | |
724 | onlink = 1; | |
725 | if (deleted) | |
726 | break; | |
727 | } else { | |
728 | unsigned long lifetime; | |
729 | ||
730 | if (!onlink) | |
731 | onlink = -1; | |
732 | ||
733 | spin_lock(&ifa->lock); | |
734 | lifetime = min_t(unsigned long, | |
735 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
736 | if (time_before(expires, | |
737 | ifa->tstamp + lifetime * HZ)) | |
738 | expires = ifa->tstamp + lifetime * HZ; | |
739 | spin_unlock(&ifa->lock); | |
740 | } | |
741 | } | |
742 | } | |
1d142804 | 743 | ifap = &ifa->if_next; |
1da177e4 LT |
744 | } |
745 | write_unlock_bh(&idev->lock); | |
746 | ||
747 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
748 | ||
e041c683 | 749 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
750 | |
751 | addrconf_del_timer(ifp); | |
752 | ||
753 | /* | |
754 | * Purge or update corresponding prefix | |
755 | * | |
756 | * 1) we don't purge prefix here if address was not permanent. | |
757 | * prefix is managed by its own lifetime. | |
758 | * 2) if there're no addresses, delete prefix. | |
759 | * 3) if there're still other permanent address(es), | |
760 | * corresponding prefix is still permanent. | |
761 | * 4) otherwise, update prefix lifetime to the | |
762 | * longest valid lifetime among the corresponding | |
763 | * addresses on the device. | |
764 | * Note: subsequent RA will update lifetime. | |
765 | * | |
766 | * --yoshfuji | |
767 | */ | |
768 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
769 | struct in6_addr prefix; | |
770 | struct rt6_info *rt; | |
c346dca1 | 771 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 772 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 773 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 LT |
774 | |
775 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
776 | if (onlink == 0) { | |
e0a1ad73 | 777 | ip6_del_rt(rt); |
1da177e4 LT |
778 | rt = NULL; |
779 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
780 | rt->rt6i_expires = expires; | |
781 | rt->rt6i_flags |= RTF_EXPIRES; | |
782 | } | |
783 | } | |
784 | dst_release(&rt->u.dst); | |
785 | } | |
786 | ||
787 | in6_ifa_put(ifp); | |
788 | } | |
789 | ||
790 | #ifdef CONFIG_IPV6_PRIVACY | |
791 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
792 | { | |
793 | struct inet6_dev *idev = ifp->idev; | |
794 | struct in6_addr addr, *tmpaddr; | |
795 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 796 | unsigned long regen_advance; |
1da177e4 LT |
797 | int tmp_plen; |
798 | int ret = 0; | |
799 | int max_addresses; | |
95c385b4 | 800 | u32 addr_flags; |
1da177e4 LT |
801 | |
802 | write_lock(&idev->lock); | |
803 | if (ift) { | |
804 | spin_lock_bh(&ift->lock); | |
805 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
806 | spin_unlock_bh(&ift->lock); | |
807 | tmpaddr = &addr; | |
808 | } else { | |
809 | tmpaddr = NULL; | |
810 | } | |
811 | retry: | |
812 | in6_dev_hold(idev); | |
813 | if (idev->cnf.use_tempaddr <= 0) { | |
814 | write_unlock(&idev->lock); | |
815 | printk(KERN_INFO | |
816 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
817 | in6_dev_put(idev); | |
818 | ret = -1; | |
819 | goto out; | |
820 | } | |
821 | spin_lock_bh(&ifp->lock); | |
822 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
823 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
824 | spin_unlock_bh(&ifp->lock); | |
825 | write_unlock(&idev->lock); | |
826 | printk(KERN_WARNING | |
827 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
828 | in6_dev_put(idev); | |
829 | ret = -1; | |
830 | goto out; | |
831 | } | |
832 | in6_ifa_hold(ifp); | |
833 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
834 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
835 | spin_unlock_bh(&ifp->lock); | |
836 | write_unlock(&idev->lock); | |
837 | printk(KERN_WARNING | |
838 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
839 | in6_ifa_put(ifp); | |
840 | in6_dev_put(idev); | |
841 | ret = -1; | |
842 | goto out; | |
843 | } | |
844 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
845 | tmp_valid_lft = min_t(__u32, | |
846 | ifp->valid_lft, | |
847 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
848 | tmp_prefered_lft = min_t(__u32, |
849 | ifp->prefered_lft, | |
1da177e4 LT |
850 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
851 | tmp_plen = ifp->prefix_len; | |
852 | max_addresses = idev->cnf.max_addresses; | |
853 | tmp_cstamp = ifp->cstamp; | |
854 | tmp_tstamp = ifp->tstamp; | |
855 | spin_unlock_bh(&ifp->lock); | |
856 | ||
eac55bf9 BB |
857 | regen_advance = idev->cnf.regen_max_retry * |
858 | idev->cnf.dad_transmits * | |
859 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 860 | write_unlock(&idev->lock); |
95c385b4 | 861 | |
eac55bf9 BB |
862 | /* A temporary address is created only if this calculated Preferred |
863 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
864 | * an implementation must not create a temporary address with a zero | |
865 | * Preferred Lifetime. | |
866 | */ | |
867 | if (tmp_prefered_lft <= regen_advance) { | |
868 | in6_ifa_put(ifp); | |
869 | in6_dev_put(idev); | |
870 | ret = -1; | |
871 | goto out; | |
872 | } | |
873 | ||
95c385b4 NH |
874 | addr_flags = IFA_F_TEMPORARY; |
875 | /* set in addrconf_prefix_rcv() */ | |
876 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
877 | addr_flags |= IFA_F_OPTIMISTIC; | |
878 | ||
1da177e4 | 879 | ift = !max_addresses || |
1ab1457c | 880 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 881 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
882 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
883 | addr_flags) : NULL; | |
1da177e4 LT |
884 | if (!ift || IS_ERR(ift)) { |
885 | in6_ifa_put(ifp); | |
886 | in6_dev_put(idev); | |
887 | printk(KERN_INFO | |
888 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
889 | tmpaddr = &addr; | |
890 | write_lock(&idev->lock); | |
891 | goto retry; | |
892 | } | |
893 | ||
894 | spin_lock_bh(&ift->lock); | |
895 | ift->ifpub = ifp; | |
896 | ift->valid_lft = tmp_valid_lft; | |
897 | ift->prefered_lft = tmp_prefered_lft; | |
898 | ift->cstamp = tmp_cstamp; | |
899 | ift->tstamp = tmp_tstamp; | |
900 | spin_unlock_bh(&ift->lock); | |
901 | ||
902 | addrconf_dad_start(ift, 0); | |
903 | in6_ifa_put(ift); | |
904 | in6_dev_put(idev); | |
905 | out: | |
906 | return ret; | |
907 | } | |
908 | #endif | |
909 | ||
910 | /* | |
072047e4 | 911 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 912 | */ |
a9b05723 YH |
913 | enum { |
914 | IPV6_SADDR_RULE_INIT = 0, | |
915 | IPV6_SADDR_RULE_LOCAL, | |
916 | IPV6_SADDR_RULE_SCOPE, | |
917 | IPV6_SADDR_RULE_PREFERRED, | |
918 | #ifdef CONFIG_IPV6_MIP6 | |
919 | IPV6_SADDR_RULE_HOA, | |
920 | #endif | |
921 | IPV6_SADDR_RULE_OIF, | |
922 | IPV6_SADDR_RULE_LABEL, | |
923 | #ifdef CONFIG_IPV6_PRIVACY | |
924 | IPV6_SADDR_RULE_PRIVACY, | |
925 | #endif | |
926 | IPV6_SADDR_RULE_ORCHID, | |
927 | IPV6_SADDR_RULE_PREFIX, | |
928 | IPV6_SADDR_RULE_MAX | |
929 | }; | |
930 | ||
072047e4 | 931 | struct ipv6_saddr_score { |
a9b05723 YH |
932 | int rule; |
933 | int addr_type; | |
934 | struct inet6_ifaddr *ifa; | |
935 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
936 | int scopedist; | |
937 | int matchlen; | |
072047e4 YH |
938 | }; |
939 | ||
a9b05723 | 940 | struct ipv6_saddr_dst { |
9acd9f3a | 941 | const struct in6_addr *addr; |
a9b05723 YH |
942 | int ifindex; |
943 | int scope; | |
944 | int label; | |
7cbca67c | 945 | unsigned int prefs; |
a9b05723 | 946 | }; |
072047e4 | 947 | |
b6f99a21 | 948 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 949 | { |
072047e4 YH |
950 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
951 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
952 | return 1; | |
953 | return 0; | |
1da177e4 LT |
954 | } |
955 | ||
a9b05723 YH |
956 | static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score, |
957 | struct ipv6_saddr_dst *dst, | |
958 | int i) | |
959 | { | |
960 | int ret; | |
961 | ||
962 | if (i <= score->rule) { | |
963 | switch (i) { | |
964 | case IPV6_SADDR_RULE_SCOPE: | |
965 | ret = score->scopedist; | |
966 | break; | |
967 | case IPV6_SADDR_RULE_PREFIX: | |
968 | ret = score->matchlen; | |
969 | break; | |
970 | default: | |
971 | ret = !!test_bit(i, score->scorebits); | |
972 | } | |
973 | goto out; | |
974 | } | |
975 | ||
976 | switch (i) { | |
977 | case IPV6_SADDR_RULE_INIT: | |
978 | /* Rule 0: remember if hiscore is not ready yet */ | |
979 | ret = !!score->ifa; | |
980 | break; | |
981 | case IPV6_SADDR_RULE_LOCAL: | |
982 | /* Rule 1: Prefer same address */ | |
983 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
984 | break; | |
985 | case IPV6_SADDR_RULE_SCOPE: | |
986 | /* Rule 2: Prefer appropriate scope | |
987 | * | |
988 | * ret | |
989 | * ^ | |
990 | * -1 | d 15 | |
991 | * ---+--+-+---> scope | |
992 | * | | |
993 | * | d is scope of the destination. | |
994 | * B-d | \ | |
995 | * | \ <- smaller scope is better if | |
996 | * B-15 | \ if scope is enough for destinaion. | |
997 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
998 | * d-C-1 | / | |
999 | * |/ <- greater is better | |
1000 | * -C / if scope is not enough for destination. | |
1001 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1002 | * | |
1003 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1004 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1005 | * Assume B = 0 and we get C > 29. | |
1006 | */ | |
1007 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1008 | if (ret >= dst->scope) | |
1009 | ret = -ret; | |
1010 | else | |
1011 | ret -= 128; /* 30 is enough */ | |
1012 | score->scopedist = ret; | |
1013 | break; | |
1014 | case IPV6_SADDR_RULE_PREFERRED: | |
1015 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1016 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1017 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1018 | break; | |
1019 | #ifdef CONFIG_IPV6_MIP6 | |
1020 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1021 | { |
a9b05723 | 1022 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1023 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1024 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1025 | break; |
7cbca67c | 1026 | } |
a9b05723 YH |
1027 | #endif |
1028 | case IPV6_SADDR_RULE_OIF: | |
1029 | /* Rule 5: Prefer outgoing interface */ | |
1030 | ret = (!dst->ifindex || | |
1031 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1032 | break; | |
1033 | case IPV6_SADDR_RULE_LABEL: | |
1034 | /* Rule 6: Prefer matching label */ | |
1035 | ret = ipv6_addr_label(&score->ifa->addr, score->addr_type, | |
1036 | score->ifa->idev->dev->ifindex) == dst->label; | |
1037 | break; | |
1038 | #ifdef CONFIG_IPV6_PRIVACY | |
1039 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1040 | { |
a9b05723 YH |
1041 | /* Rule 7: Prefer public address |
1042 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1043 | */ | |
7cbca67c YH |
1044 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1045 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1046 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1047 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1048 | break; |
7cbca67c | 1049 | } |
a9b05723 YH |
1050 | #endif |
1051 | case IPV6_SADDR_RULE_ORCHID: | |
1052 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1053 | * non-ORCHID vs non-ORCHID | |
1054 | */ | |
1055 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1056 | ipv6_addr_orchid(dst->addr)); | |
1057 | break; | |
1058 | case IPV6_SADDR_RULE_PREFIX: | |
1059 | /* Rule 8: Use longest matching prefix */ | |
1060 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1061 | dst->addr); | |
1062 | break; | |
1063 | default: | |
1064 | ret = 0; | |
1065 | } | |
1066 | ||
1067 | if (ret) | |
1068 | __set_bit(i, score->scorebits); | |
1069 | score->rule = i; | |
1070 | out: | |
1071 | return ret; | |
1072 | } | |
1073 | ||
1074 | int ipv6_dev_get_saddr(struct net_device *dst_dev, | |
9acd9f3a | 1075 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1076 | struct in6_addr *saddr) |
1da177e4 | 1077 | { |
a9b05723 YH |
1078 | struct ipv6_saddr_score scores[2], |
1079 | *score = &scores[0], *hiscore = &scores[1]; | |
c346dca1 | 1080 | struct net *net = dev_net(dst_dev); |
a9b05723 | 1081 | struct ipv6_saddr_dst dst; |
072047e4 | 1082 | struct net_device *dev; |
a9b05723 | 1083 | int dst_type; |
1da177e4 | 1084 | |
a9b05723 YH |
1085 | dst_type = __ipv6_addr_type(daddr); |
1086 | dst.addr = daddr; | |
1087 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1088 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
1089 | dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex); | |
7cbca67c | 1090 | dst.prefs = prefs; |
a9b05723 YH |
1091 | |
1092 | hiscore->rule = -1; | |
1093 | hiscore->ifa = NULL; | |
1da177e4 | 1094 | |
072047e4 | 1095 | read_lock(&dev_base_lock); |
8814c4b5 | 1096 | rcu_read_lock(); |
1da177e4 | 1097 | |
6fda7350 | 1098 | for_each_netdev(net, dev) { |
072047e4 | 1099 | struct inet6_dev *idev; |
072047e4 | 1100 | |
a9b05723 | 1101 | /* Candidate Source Address (section 4) |
072047e4 YH |
1102 | * - multicast and link-local destination address, |
1103 | * the set of candidate source address MUST only | |
1104 | * include addresses assigned to interfaces | |
1105 | * belonging to the same link as the outgoing | |
1106 | * interface. | |
1107 | * (- For site-local destination addresses, the | |
1108 | * set of candidate source addresses MUST only | |
1109 | * include addresses assigned to interfaces | |
1110 | * belonging to the same site as the outgoing | |
1111 | * interface.) | |
1112 | */ | |
a9b05723 YH |
1113 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1114 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1115 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1116 | continue; |
1da177e4 | 1117 | |
1da177e4 | 1118 | idev = __in6_dev_get(dev); |
072047e4 YH |
1119 | if (!idev) |
1120 | continue; | |
1121 | ||
1122 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1123 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1124 | int i; | |
072047e4 | 1125 | |
a9b05723 | 1126 | /* |
6b3ae80a YH |
1127 | * - Tentative Address (RFC2462 section 5.4) |
1128 | * - A tentative address is not considered | |
1129 | * "assigned to an interface" in the traditional | |
95c385b4 | 1130 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1131 | * - Candidate Source Address (section 4) |
072047e4 YH |
1132 | * - In any case, anycast addresses, multicast |
1133 | * addresses, and the unspecified address MUST | |
1134 | * NOT be included in a candidate set. | |
1135 | */ | |
a9b05723 YH |
1136 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1137 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1138 | continue; |
a9b05723 YH |
1139 | |
1140 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1141 | ||
1142 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1143 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1144 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1145 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1146 | "assigned as unicast address on %s", |
1147 | dev->name); | |
1148 | continue; | |
1149 | } | |
1150 | ||
a9b05723 YH |
1151 | score->rule = -1; |
1152 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1153 | ||
1154 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1155 | int minihiscore, miniscore; | |
1156 | ||
1157 | minihiscore = ipv6_get_saddr_eval(hiscore, &dst, i); | |
1158 | miniscore = ipv6_get_saddr_eval(score, &dst, i); | |
1159 | ||
1160 | if (minihiscore > miniscore) { | |
1161 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1162 | score->scopedist > 0) { | |
1163 | /* | |
1164 | * special case: | |
1165 | * each remaining entry | |
1166 | * has too small (not enough) | |
1167 | * scope, because ifa entries | |
1168 | * are sorted by their scope | |
1169 | * values. | |
1170 | */ | |
1171 | goto try_nextdev; | |
1172 | } | |
1173 | break; | |
1174 | } else if (minihiscore < miniscore) { | |
1175 | struct ipv6_saddr_score *tmp; | |
1176 | ||
1177 | if (hiscore->ifa) | |
1178 | in6_ifa_put(hiscore->ifa); | |
1179 | ||
1180 | in6_ifa_hold(score->ifa); | |
1181 | ||
1182 | tmp = hiscore; | |
1183 | hiscore = score; | |
1184 | score = tmp; | |
1185 | ||
1186 | /* restore our iterator */ | |
1187 | score->ifa = hiscore->ifa; | |
1188 | ||
1189 | break; | |
1da177e4 | 1190 | } |
072047e4 | 1191 | } |
1da177e4 | 1192 | } |
a9b05723 | 1193 | try_nextdev: |
072047e4 | 1194 | read_unlock_bh(&idev->lock); |
1da177e4 | 1195 | } |
8814c4b5 | 1196 | rcu_read_unlock(); |
1da177e4 LT |
1197 | read_unlock(&dev_base_lock); |
1198 | ||
a9b05723 | 1199 | if (!hiscore->ifa) |
072047e4 | 1200 | return -EADDRNOTAVAIL; |
1ab1457c | 1201 | |
a9b05723 YH |
1202 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1203 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1204 | return 0; |
1da177e4 LT |
1205 | } |
1206 | ||
5e5f3f0f | 1207 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1208 | |
95c385b4 NH |
1209 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1210 | unsigned char banned_flags) | |
1da177e4 LT |
1211 | { |
1212 | struct inet6_dev *idev; | |
1213 | int err = -EADDRNOTAVAIL; | |
1214 | ||
8814c4b5 | 1215 | rcu_read_lock(); |
1da177e4 LT |
1216 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1217 | struct inet6_ifaddr *ifp; | |
1218 | ||
1219 | read_lock_bh(&idev->lock); | |
1220 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1221 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1222 | ipv6_addr_copy(addr, &ifp->addr); |
1223 | err = 0; | |
1224 | break; | |
1225 | } | |
1226 | } | |
1227 | read_unlock_bh(&idev->lock); | |
1228 | } | |
8814c4b5 | 1229 | rcu_read_unlock(); |
1da177e4 LT |
1230 | return err; |
1231 | } | |
1232 | ||
1233 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1234 | { | |
1235 | int cnt = 0; | |
1236 | struct inet6_ifaddr *ifp; | |
1237 | ||
1238 | read_lock_bh(&idev->lock); | |
1239 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1240 | cnt++; | |
1241 | read_unlock_bh(&idev->lock); | |
1242 | return cnt; | |
1243 | } | |
1244 | ||
bfeade08 DL |
1245 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1246 | struct net_device *dev, int strict) | |
1da177e4 LT |
1247 | { |
1248 | struct inet6_ifaddr * ifp; | |
1249 | u8 hash = ipv6_addr_hash(addr); | |
1250 | ||
1251 | read_lock_bh(&addrconf_hash_lock); | |
1252 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1253 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1254 | continue; |
1da177e4 LT |
1255 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1256 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1257 | if (dev == NULL || ifp->idev->dev == dev || | |
1258 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | read_unlock_bh(&addrconf_hash_lock); | |
1263 | return ifp != NULL; | |
1264 | } | |
7159039a YH |
1265 | EXPORT_SYMBOL(ipv6_chk_addr); |
1266 | ||
1da177e4 | 1267 | static |
06bfe655 DL |
1268 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1269 | struct net_device *dev) | |
1da177e4 LT |
1270 | { |
1271 | struct inet6_ifaddr * ifp; | |
1272 | u8 hash = ipv6_addr_hash(addr); | |
1273 | ||
1274 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1275 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1276 | continue; |
1da177e4 LT |
1277 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1278 | if (dev == NULL || ifp->idev->dev == dev) | |
1279 | break; | |
1280 | } | |
1281 | } | |
1282 | return ifp != NULL; | |
1283 | } | |
1284 | ||
52eeeb84 YH |
1285 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1286 | { | |
1287 | struct inet6_dev *idev; | |
1288 | struct inet6_ifaddr *ifa; | |
1289 | int onlink; | |
1290 | ||
1291 | onlink = 0; | |
1292 | rcu_read_lock(); | |
1293 | idev = __in6_dev_get(dev); | |
1294 | if (idev) { | |
1295 | read_lock_bh(&idev->lock); | |
1296 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
1297 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
1298 | ifa->prefix_len); | |
1299 | if (onlink) | |
1300 | break; | |
1301 | } | |
1302 | read_unlock_bh(&idev->lock); | |
1303 | } | |
1304 | rcu_read_unlock(); | |
1305 | return onlink; | |
1306 | } | |
1307 | ||
1308 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1309 | ||
9acd9f3a | 1310 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1311 | struct net_device *dev, int strict) |
1da177e4 LT |
1312 | { |
1313 | struct inet6_ifaddr * ifp; | |
1314 | u8 hash = ipv6_addr_hash(addr); | |
1315 | ||
1316 | read_lock_bh(&addrconf_hash_lock); | |
1317 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1318 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1319 | continue; |
1da177e4 LT |
1320 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1321 | if (dev == NULL || ifp->idev->dev == dev || | |
1322 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1323 | in6_ifa_hold(ifp); | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | read_unlock_bh(&addrconf_hash_lock); | |
1329 | ||
1330 | return ifp; | |
1331 | } | |
1332 | ||
1333 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1334 | { | |
1335 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1336 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1337 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1338 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1339 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1340 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1341 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1342 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1343 | ||
1344 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1345 | return 1; | |
1346 | ||
1347 | if (addr_type2 == IPV6_ADDR_ANY && | |
1348 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1349 | return 1; | |
1350 | ||
1351 | if (addr_type == IPV6_ADDR_ANY && | |
1352 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1353 | return 1; | |
1354 | ||
1355 | if (sk2_rcv_saddr6 && | |
1356 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1357 | return 1; | |
1358 | ||
1359 | if (addr_type == IPV6_ADDR_MAPPED && | |
1360 | !sk2_ipv6only && | |
1361 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1362 | return 1; | |
1363 | ||
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | /* Gets referenced address, destroys ifaddr */ | |
1368 | ||
9f5336e2 | 1369 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1370 | { |
1da177e4 LT |
1371 | if (ifp->flags&IFA_F_PERMANENT) { |
1372 | spin_lock_bh(&ifp->lock); | |
1373 | addrconf_del_timer(ifp); | |
1374 | ifp->flags |= IFA_F_TENTATIVE; | |
1375 | spin_unlock_bh(&ifp->lock); | |
1376 | in6_ifa_put(ifp); | |
1377 | #ifdef CONFIG_IPV6_PRIVACY | |
1378 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1379 | struct inet6_ifaddr *ifpub; | |
1380 | spin_lock_bh(&ifp->lock); | |
1381 | ifpub = ifp->ifpub; | |
1382 | if (ifpub) { | |
1383 | in6_ifa_hold(ifpub); | |
1384 | spin_unlock_bh(&ifp->lock); | |
1385 | ipv6_create_tempaddr(ifpub, ifp); | |
1386 | in6_ifa_put(ifpub); | |
1387 | } else { | |
1388 | spin_unlock_bh(&ifp->lock); | |
1389 | } | |
1390 | ipv6_del_addr(ifp); | |
1391 | #endif | |
1392 | } else | |
1393 | ipv6_del_addr(ifp); | |
1394 | } | |
1395 | ||
3c21edbd YH |
1396 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1397 | { | |
1398 | if (net_ratelimit()) | |
1399 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1400 | addrconf_dad_stop(ifp); | |
1401 | } | |
1da177e4 LT |
1402 | |
1403 | /* Join to solicited addr multicast group. */ | |
1404 | ||
1405 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1406 | { | |
1407 | struct in6_addr maddr; | |
1408 | ||
1409 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1410 | return; | |
1411 | ||
1412 | addrconf_addr_solict_mult(addr, &maddr); | |
1413 | ipv6_dev_mc_inc(dev, &maddr); | |
1414 | } | |
1415 | ||
1416 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1417 | { | |
1418 | struct in6_addr maddr; | |
1419 | ||
1420 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1421 | return; | |
1422 | ||
1423 | addrconf_addr_solict_mult(addr, &maddr); | |
1424 | __ipv6_dev_mc_dec(idev, &maddr); | |
1425 | } | |
1426 | ||
20380731 | 1427 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1428 | { |
1429 | struct in6_addr addr; | |
1430 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1431 | if (ipv6_addr_any(&addr)) | |
1432 | return; | |
1433 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1434 | } | |
1435 | ||
20380731 | 1436 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1437 | { |
1438 | struct in6_addr addr; | |
1439 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1440 | if (ipv6_addr_any(&addr)) | |
1441 | return; | |
1442 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1443 | } | |
1444 | ||
073a8e0e YH |
1445 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1446 | { | |
1447 | if (dev->addr_len != ETH_ALEN) | |
1448 | return -1; | |
1449 | memcpy(eui, dev->dev_addr, 3); | |
1450 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1451 | ||
1452 | /* | |
1453 | * The zSeries OSA network cards can be shared among various | |
1454 | * OS instances, but the OSA cards have only one MAC address. | |
1455 | * This leads to duplicate address conflicts in conjunction | |
1456 | * with IPv6 if more than one instance uses the same card. | |
1457 | * | |
1458 | * The driver for these cards can deliver a unique 16-bit | |
1459 | * identifier for each instance sharing the same card. It is | |
1460 | * placed instead of 0xFFFE in the interface identifier. The | |
1461 | * "u" bit of the interface identifier is not inverted in this | |
1462 | * case. Hence the resulting interface identifier has local | |
1463 | * scope according to RFC2373. | |
1464 | */ | |
1465 | if (dev->dev_id) { | |
1466 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1467 | eui[4] = dev->dev_id & 0xFF; | |
1468 | } else { | |
1469 | eui[3] = 0xFF; | |
1470 | eui[4] = 0xFE; | |
1471 | eui[0] ^= 2; | |
1472 | } | |
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1477 | { | |
1478 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1479 | if (dev->addr_len != ARCNET_ALEN) | |
1480 | return -1; | |
1481 | memset(eui, 0, 7); | |
1482 | eui[7] = *(u8*)dev->dev_addr; | |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1487 | { | |
1488 | if (dev->addr_len != INFINIBAND_ALEN) | |
1489 | return -1; | |
1490 | memcpy(eui, dev->dev_addr + 12, 8); | |
1491 | eui[0] |= 2; | |
1492 | return 0; | |
1493 | } | |
1494 | ||
dfd982ba YH |
1495 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1496 | { | |
1497 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || | |
1498 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1499 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1500 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1501 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1502 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1503 | eui[1] = 0; | |
1504 | eui[2] = 0x5E; | |
1505 | eui[3] = 0xFE; | |
1506 | memcpy(eui + 4, &addr, 4); | |
1507 | return 0; | |
1508 | } | |
1509 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1510 | ||
1511 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1512 | { | |
1513 | if (dev->priv_flags & IFF_ISATAP) | |
1514 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1515 | return -1; | |
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1519 | { | |
1520 | switch (dev->type) { | |
1521 | case ARPHRD_ETHER: | |
1522 | case ARPHRD_FDDI: | |
1523 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1524 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1525 | case ARPHRD_ARCNET: |
073a8e0e | 1526 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1527 | case ARPHRD_INFINIBAND: |
073a8e0e | 1528 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1529 | case ARPHRD_SIT: |
dfd982ba | 1530 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1531 | } |
1532 | return -1; | |
1533 | } | |
1534 | ||
1535 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1536 | { | |
1537 | int err = -1; | |
1538 | struct inet6_ifaddr *ifp; | |
1539 | ||
1540 | read_lock_bh(&idev->lock); | |
1541 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1542 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1543 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1544 | err = 0; | |
1545 | break; | |
1546 | } | |
1547 | } | |
1548 | read_unlock_bh(&idev->lock); | |
1549 | return err; | |
1550 | } | |
1551 | ||
1552 | #ifdef CONFIG_IPV6_PRIVACY | |
1553 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1554 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1555 | { | |
1da177e4 | 1556 | regen: |
955189ef | 1557 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1558 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1559 | |
1560 | /* | |
1561 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1562 | * check if generated address is not inappropriate | |
1563 | * | |
1564 | * - Reserved subnet anycast (RFC 2526) | |
1565 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1566 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1567 | * 00-00-5E-FE-xx-xx-xx-xx |
1568 | * - value 0 | |
1569 | * - XXX: already assigned to an address on the device | |
1570 | */ | |
1ab1457c | 1571 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1572 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1573 | (idev->rndid[7]&0x80)) | |
1574 | goto regen; | |
1575 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1576 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1577 | goto regen; | |
1578 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1579 | goto regen; | |
1580 | } | |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | static void ipv6_regen_rndid(unsigned long data) | |
1586 | { | |
1587 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1588 | unsigned long expires; | |
1589 | ||
8814c4b5 | 1590 | rcu_read_lock_bh(); |
1da177e4 LT |
1591 | write_lock_bh(&idev->lock); |
1592 | ||
1593 | if (idev->dead) | |
1594 | goto out; | |
1595 | ||
1596 | if (__ipv6_regen_rndid(idev) < 0) | |
1597 | goto out; | |
1ab1457c | 1598 | |
1da177e4 | 1599 | expires = jiffies + |
1ab1457c | 1600 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1601 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1602 | if (time_before(expires, jiffies)) { | |
1603 | printk(KERN_WARNING | |
1604 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1605 | idev->dev->name); | |
1606 | goto out; | |
1607 | } | |
1608 | ||
1609 | if (!mod_timer(&idev->regen_timer, expires)) | |
1610 | in6_dev_hold(idev); | |
1611 | ||
1612 | out: | |
1613 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1614 | rcu_read_unlock_bh(); |
1da177e4 LT |
1615 | in6_dev_put(idev); |
1616 | } | |
1617 | ||
1618 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1619 | int ret = 0; | |
1620 | ||
1621 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1622 | ret = __ipv6_regen_rndid(idev); | |
1623 | return ret; | |
1624 | } | |
1625 | #endif | |
1626 | ||
1627 | /* | |
1628 | * Add prefix route. | |
1629 | */ | |
1630 | ||
1631 | static void | |
1632 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1633 | unsigned long expires, u32 flags) |
1da177e4 | 1634 | { |
86872cb5 TG |
1635 | struct fib6_config cfg = { |
1636 | .fc_table = RT6_TABLE_PREFIX, | |
1637 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1638 | .fc_ifindex = dev->ifindex, | |
1639 | .fc_expires = expires, | |
1640 | .fc_dst_len = plen, | |
1641 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1642 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1643 | }; |
1da177e4 | 1644 | |
86872cb5 | 1645 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1646 | |
1647 | /* Prevent useless cloning on PtP SIT. | |
1648 | This thing is done here expecting that the whole | |
1649 | class of non-broadcast devices need not cloning. | |
1650 | */ | |
0be669bb | 1651 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1652 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1653 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1654 | #endif |
1da177e4 | 1655 | |
86872cb5 | 1656 | ip6_route_add(&cfg); |
1da177e4 LT |
1657 | } |
1658 | ||
1659 | /* Create "default" multicast route to the interface */ | |
1660 | ||
1661 | static void addrconf_add_mroute(struct net_device *dev) | |
1662 | { | |
86872cb5 TG |
1663 | struct fib6_config cfg = { |
1664 | .fc_table = RT6_TABLE_LOCAL, | |
1665 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1666 | .fc_ifindex = dev->ifindex, | |
1667 | .fc_dst_len = 8, | |
1668 | .fc_flags = RTF_UP, | |
c346dca1 | 1669 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1670 | }; |
1671 | ||
1672 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1673 | ||
1674 | ip6_route_add(&cfg); | |
1da177e4 LT |
1675 | } |
1676 | ||
0be669bb | 1677 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1678 | static void sit_route_add(struct net_device *dev) |
1679 | { | |
86872cb5 TG |
1680 | struct fib6_config cfg = { |
1681 | .fc_table = RT6_TABLE_MAIN, | |
1682 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1683 | .fc_ifindex = dev->ifindex, | |
1684 | .fc_dst_len = 96, | |
1685 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1686 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1687 | }; |
1da177e4 LT |
1688 | |
1689 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1690 | ip6_route_add(&cfg); |
1da177e4 | 1691 | } |
0be669bb | 1692 | #endif |
1da177e4 LT |
1693 | |
1694 | static void addrconf_add_lroute(struct net_device *dev) | |
1695 | { | |
1696 | struct in6_addr addr; | |
1697 | ||
1698 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1699 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1700 | } | |
1701 | ||
1702 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1703 | { | |
1704 | struct inet6_dev *idev; | |
1705 | ||
1706 | ASSERT_RTNL(); | |
1707 | ||
1708 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1709 | return NULL; | |
1710 | ||
1711 | /* Add default multicast route */ | |
1712 | addrconf_add_mroute(dev); | |
1713 | ||
1714 | /* Add link local route */ | |
1715 | addrconf_add_lroute(dev); | |
1716 | return idev; | |
1717 | } | |
1718 | ||
1719 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1720 | { | |
1721 | struct prefix_info *pinfo; | |
1722 | __u32 valid_lft; | |
1723 | __u32 prefered_lft; | |
1724 | int addr_type; | |
1725 | unsigned long rt_expires; | |
1726 | struct inet6_dev *in6_dev; | |
1727 | ||
1728 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1729 | |
1da177e4 LT |
1730 | if (len < sizeof(struct prefix_info)) { |
1731 | ADBG(("addrconf: prefix option too short\n")); | |
1732 | return; | |
1733 | } | |
1ab1457c | 1734 | |
1da177e4 LT |
1735 | /* |
1736 | * Validation checks ([ADDRCONF], page 19) | |
1737 | */ | |
1738 | ||
1739 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1740 | ||
1741 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1742 | return; | |
1743 | ||
1744 | valid_lft = ntohl(pinfo->valid); | |
1745 | prefered_lft = ntohl(pinfo->prefered); | |
1746 | ||
1747 | if (prefered_lft > valid_lft) { | |
1748 | if (net_ratelimit()) | |
1749 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1750 | return; | |
1751 | } | |
1752 | ||
1753 | in6_dev = in6_dev_get(dev); | |
1754 | ||
1755 | if (in6_dev == NULL) { | |
1756 | if (net_ratelimit()) | |
1757 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1758 | return; | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * Two things going on here: | |
1763 | * 1) Add routes for on-link prefixes | |
1764 | * 2) Configure prefixes with the auto flag set | |
1765 | */ | |
1766 | ||
1767 | /* Avoid arithmetic overflow. Really, we could | |
1768 | save rt_expires in seconds, likely valid_lft, | |
1769 | but it would require division in fib gc, that it | |
1770 | not good. | |
1771 | */ | |
1772 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1773 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1774 | else |
3dd4bc68 YH |
1775 | rt_expires = valid_lft * HZ; |
1776 | ||
1777 | /* | |
1778 | * We convert this (in jiffies) to clock_t later. | |
1779 | * Avoid arithmetic overflow there as well. | |
1780 | * Overflow can happen only if HZ < USER_HZ. | |
1781 | */ | |
1782 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1783 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1784 | |
1785 | if (pinfo->onlink) { | |
1786 | struct rt6_info *rt; | |
c346dca1 | 1787 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
6fda7350 | 1788 | dev->ifindex, 1); |
1da177e4 LT |
1789 | |
1790 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1791 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1792 | if (valid_lft == 0) { | |
e0a1ad73 | 1793 | ip6_del_rt(rt); |
1da177e4 LT |
1794 | rt = NULL; |
1795 | } else { | |
3dd4bc68 | 1796 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1797 | } |
1798 | } | |
1799 | } else if (valid_lft) { | |
1800 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1801 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1802 | } |
1803 | if (rt) | |
1804 | dst_release(&rt->u.dst); | |
1805 | } | |
1806 | ||
1807 | /* Try to figure out our local address for this prefix */ | |
1808 | ||
1809 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1810 | struct inet6_ifaddr * ifp; | |
1811 | struct in6_addr addr; | |
1812 | int create = 0, update_lft = 0; | |
1813 | ||
1814 | if (pinfo->prefix_len == 64) { | |
1815 | memcpy(&addr, &pinfo->prefix, 8); | |
1816 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1817 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1818 | in6_dev_put(in6_dev); | |
1819 | return; | |
1820 | } | |
1821 | goto ok; | |
1822 | } | |
1823 | if (net_ratelimit()) | |
1824 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1825 | pinfo->prefix_len); | |
1826 | in6_dev_put(in6_dev); | |
1827 | return; | |
1828 | ||
1829 | ok: | |
1830 | ||
c346dca1 | 1831 | ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1); |
1da177e4 LT |
1832 | |
1833 | if (ifp == NULL && valid_lft) { | |
1834 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1835 | u32 addr_flags = 0; |
1836 | ||
1837 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1838 | if (in6_dev->cnf.optimistic_dad && | |
1839 | !ipv6_devconf.forwarding) | |
1840 | addr_flags = IFA_F_OPTIMISTIC; | |
1841 | #endif | |
1da177e4 LT |
1842 | |
1843 | /* Do not allow to create too much of autoconfigured | |
1844 | * addresses; this would be too easy way to crash kernel. | |
1845 | */ | |
1846 | if (!max_addresses || | |
1847 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1848 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1849 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1850 | addr_flags); | |
1da177e4 LT |
1851 | |
1852 | if (!ifp || IS_ERR(ifp)) { | |
1853 | in6_dev_put(in6_dev); | |
1854 | return; | |
1855 | } | |
1856 | ||
1857 | update_lft = create = 1; | |
1858 | ifp->cstamp = jiffies; | |
1859 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1860 | } | |
1861 | ||
1862 | if (ifp) { | |
1863 | int flags; | |
1864 | unsigned long now; | |
1865 | #ifdef CONFIG_IPV6_PRIVACY | |
1866 | struct inet6_ifaddr *ift; | |
1867 | #endif | |
1868 | u32 stored_lft; | |
1869 | ||
1870 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1871 | spin_lock(&ifp->lock); | |
1872 | now = jiffies; | |
1873 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1874 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1875 | else | |
1876 | stored_lft = 0; | |
1877 | if (!update_lft && stored_lft) { | |
1878 | if (valid_lft > MIN_VALID_LIFETIME || | |
1879 | valid_lft > stored_lft) | |
1880 | update_lft = 1; | |
1881 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1882 | /* valid_lft <= stored_lft is always true */ | |
1883 | /* XXX: IPsec */ | |
1884 | update_lft = 0; | |
1885 | } else { | |
1886 | valid_lft = MIN_VALID_LIFETIME; | |
1887 | if (valid_lft < prefered_lft) | |
1888 | prefered_lft = valid_lft; | |
1889 | update_lft = 1; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | if (update_lft) { | |
1894 | ifp->valid_lft = valid_lft; | |
1895 | ifp->prefered_lft = prefered_lft; | |
1896 | ifp->tstamp = now; | |
1897 | flags = ifp->flags; | |
1898 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1899 | spin_unlock(&ifp->lock); | |
1900 | ||
1901 | if (!(flags&IFA_F_TENTATIVE)) | |
1902 | ipv6_ifa_notify(0, ifp); | |
1903 | } else | |
1904 | spin_unlock(&ifp->lock); | |
1905 | ||
1906 | #ifdef CONFIG_IPV6_PRIVACY | |
1907 | read_lock_bh(&in6_dev->lock); | |
1908 | /* update all temporary addresses in the list */ | |
1909 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1910 | /* | |
1911 | * When adjusting the lifetimes of an existing | |
1912 | * temporary address, only lower the lifetimes. | |
1913 | * Implementations must not increase the | |
1914 | * lifetimes of an existing temporary address | |
1915 | * when processing a Prefix Information Option. | |
1916 | */ | |
c6fbfac2 BB |
1917 | if (ifp != ift->ifpub) |
1918 | continue; | |
1919 | ||
1da177e4 LT |
1920 | spin_lock(&ift->lock); |
1921 | flags = ift->flags; | |
1922 | if (ift->valid_lft > valid_lft && | |
1923 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1924 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1925 | if (ift->prefered_lft > prefered_lft && | |
1926 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1927 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1928 | spin_unlock(&ift->lock); | |
1929 | if (!(flags&IFA_F_TENTATIVE)) | |
1930 | ipv6_ifa_notify(0, ift); | |
1931 | } | |
1932 | ||
1933 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1934 | /* | |
1935 | * When a new public address is created as described in [ADDRCONF], | |
1936 | * also create a new temporary address. | |
1937 | */ | |
1ab1457c | 1938 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1939 | ipv6_create_tempaddr(ifp, NULL); |
1940 | } else { | |
1941 | read_unlock_bh(&in6_dev->lock); | |
1942 | } | |
1943 | #endif | |
1944 | in6_ifa_put(ifp); | |
1945 | addrconf_verify(0); | |
1946 | } | |
1947 | } | |
1948 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1949 | in6_dev_put(in6_dev); | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Set destination address. | |
1954 | * Special case for SIT interfaces where we create a new "virtual" | |
1955 | * device. | |
1956 | */ | |
af284937 | 1957 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
1958 | { |
1959 | struct in6_ifreq ireq; | |
1960 | struct net_device *dev; | |
1961 | int err = -EINVAL; | |
1962 | ||
1963 | rtnl_lock(); | |
1964 | ||
1965 | err = -EFAULT; | |
1966 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1967 | goto err_exit; | |
1968 | ||
af284937 | 1969 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
1970 | |
1971 | err = -ENODEV; | |
1972 | if (dev == NULL) | |
1973 | goto err_exit; | |
1974 | ||
0be669bb | 1975 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1976 | if (dev->type == ARPHRD_SIT) { |
1977 | struct ifreq ifr; | |
1978 | mm_segment_t oldfs; | |
1979 | struct ip_tunnel_parm p; | |
1980 | ||
1981 | err = -EADDRNOTAVAIL; | |
1982 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1983 | goto err_exit; | |
1984 | ||
1985 | memset(&p, 0, sizeof(p)); | |
1986 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1987 | p.iph.saddr = 0; | |
1988 | p.iph.version = 4; | |
1989 | p.iph.ihl = 5; | |
1990 | p.iph.protocol = IPPROTO_IPV6; | |
1991 | p.iph.ttl = 64; | |
d20b3109 | 1992 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 LT |
1993 | |
1994 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1995 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1996 | set_fs(oldfs); | |
1997 | ||
1998 | if (err == 0) { | |
1999 | err = -ENOBUFS; | |
af284937 DL |
2000 | dev = __dev_get_by_name(net, p.name); |
2001 | if (!dev) | |
1da177e4 LT |
2002 | goto err_exit; |
2003 | err = dev_open(dev); | |
2004 | } | |
2005 | } | |
0be669bb | 2006 | #endif |
1da177e4 LT |
2007 | |
2008 | err_exit: | |
2009 | rtnl_unlock(); | |
2010 | return err; | |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | * Manual configuration of address on an interface | |
2015 | */ | |
af284937 DL |
2016 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
2017 | int plen, __u8 ifa_flags, __u32 prefered_lft, | |
2018 | __u32 valid_lft) | |
1da177e4 LT |
2019 | { |
2020 | struct inet6_ifaddr *ifp; | |
2021 | struct inet6_dev *idev; | |
2022 | struct net_device *dev; | |
2023 | int scope; | |
46d48046 | 2024 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
2025 | |
2026 | ASSERT_RTNL(); | |
1ab1457c | 2027 | |
0778769d NT |
2028 | /* check the lifetime */ |
2029 | if (!valid_lft || prefered_lft > valid_lft) | |
2030 | return -EINVAL; | |
2031 | ||
af284937 DL |
2032 | dev = __dev_get_by_index(net, ifindex); |
2033 | if (!dev) | |
1da177e4 | 2034 | return -ENODEV; |
1ab1457c | 2035 | |
1da177e4 LT |
2036 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2037 | return -ENOBUFS; | |
2038 | ||
2039 | scope = ipv6_addr_scope(pfx); | |
2040 | ||
46d48046 | 2041 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 2042 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
2043 | flags = 0; |
2044 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
2045 | valid_lft = 0x7FFFFFFF/HZ; |
2046 | ||
2047 | if (prefered_lft == 0) | |
2048 | ifa_flags |= IFA_F_DEPRECATED; | |
2049 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
2050 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2051 | prefered_lft = 0x7FFFFFFF/HZ; | |
2052 | ||
2053 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2054 | ||
1da177e4 | 2055 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2056 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2057 | ifp->valid_lft = valid_lft; |
2058 | ifp->prefered_lft = prefered_lft; | |
2059 | ifp->tstamp = jiffies; | |
06aebfb7 | 2060 | spin_unlock_bh(&ifp->lock); |
0778769d | 2061 | |
46d48046 YH |
2062 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
2063 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
2064 | /* |
2065 | * Note that section 3.1 of RFC 4429 indicates | |
2066 | * that the Optimistic flag should not be set for | |
2067 | * manually configured addresses | |
2068 | */ | |
1da177e4 LT |
2069 | addrconf_dad_start(ifp, 0); |
2070 | in6_ifa_put(ifp); | |
0778769d | 2071 | addrconf_verify(0); |
1da177e4 LT |
2072 | return 0; |
2073 | } | |
2074 | ||
2075 | return PTR_ERR(ifp); | |
2076 | } | |
2077 | ||
af284937 DL |
2078 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
2079 | int plen) | |
1da177e4 LT |
2080 | { |
2081 | struct inet6_ifaddr *ifp; | |
2082 | struct inet6_dev *idev; | |
2083 | struct net_device *dev; | |
1ab1457c | 2084 | |
af284937 DL |
2085 | dev = __dev_get_by_index(net, ifindex); |
2086 | if (!dev) | |
1da177e4 LT |
2087 | return -ENODEV; |
2088 | ||
2089 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2090 | return -ENXIO; | |
2091 | ||
2092 | read_lock_bh(&idev->lock); | |
2093 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2094 | if (ifp->prefix_len == plen && | |
2095 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2096 | in6_ifa_hold(ifp); | |
2097 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2098 | |
1da177e4 LT |
2099 | ipv6_del_addr(ifp); |
2100 | ||
2101 | /* If the last address is deleted administratively, | |
2102 | disable IPv6 on this interface. | |
2103 | */ | |
2104 | if (idev->addr_list == NULL) | |
2105 | addrconf_ifdown(idev->dev, 1); | |
2106 | return 0; | |
2107 | } | |
2108 | } | |
2109 | read_unlock_bh(&idev->lock); | |
2110 | return -EADDRNOTAVAIL; | |
2111 | } | |
2112 | ||
2113 | ||
af284937 | 2114 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2115 | { |
2116 | struct in6_ifreq ireq; | |
2117 | int err; | |
1ab1457c | 2118 | |
1da177e4 LT |
2119 | if (!capable(CAP_NET_ADMIN)) |
2120 | return -EPERM; | |
1ab1457c | 2121 | |
1da177e4 LT |
2122 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2123 | return -EFAULT; | |
2124 | ||
2125 | rtnl_lock(); | |
af284937 DL |
2126 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2127 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2128 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2129 | rtnl_unlock(); |
2130 | return err; | |
2131 | } | |
2132 | ||
af284937 | 2133 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2134 | { |
2135 | struct in6_ifreq ireq; | |
2136 | int err; | |
1ab1457c | 2137 | |
1da177e4 LT |
2138 | if (!capable(CAP_NET_ADMIN)) |
2139 | return -EPERM; | |
2140 | ||
2141 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2142 | return -EFAULT; | |
2143 | ||
2144 | rtnl_lock(); | |
af284937 DL |
2145 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2146 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2147 | rtnl_unlock(); |
2148 | return err; | |
2149 | } | |
2150 | ||
0be669bb | 2151 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2152 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2153 | { | |
2154 | struct inet6_ifaddr * ifp; | |
2155 | struct in6_addr addr; | |
2156 | struct net_device *dev; | |
c346dca1 | 2157 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2158 | int scope; |
2159 | ||
2160 | ASSERT_RTNL(); | |
2161 | ||
2162 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2163 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2164 | ||
2165 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2166 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2167 | scope = IFA_LINK; | |
2168 | } else { | |
2169 | scope = IPV6_ADDR_COMPATv4; | |
2170 | } | |
2171 | ||
2172 | if (addr.s6_addr32[3]) { | |
2173 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2174 | if (!IS_ERR(ifp)) { | |
2175 | spin_lock_bh(&ifp->lock); | |
2176 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2177 | spin_unlock_bh(&ifp->lock); | |
2178 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2179 | in6_ifa_put(ifp); | |
2180 | } | |
2181 | return; | |
2182 | } | |
2183 | ||
6fda7350 | 2184 | for_each_netdev(net, dev) { |
e5ed6399 | 2185 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2186 | if (in_dev && (dev->flags & IFF_UP)) { |
2187 | struct in_ifaddr * ifa; | |
2188 | ||
2189 | int flag = scope; | |
2190 | ||
2191 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2192 | int plen; | |
2193 | ||
2194 | addr.s6_addr32[3] = ifa->ifa_local; | |
2195 | ||
2196 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2197 | continue; | |
2198 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2199 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2200 | continue; | |
2201 | flag |= IFA_HOST; | |
2202 | } | |
2203 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2204 | plen = 64; | |
2205 | else | |
2206 | plen = 96; | |
2207 | ||
2208 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2209 | IFA_F_PERMANENT); | |
2210 | if (!IS_ERR(ifp)) { | |
2211 | spin_lock_bh(&ifp->lock); | |
2212 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2213 | spin_unlock_bh(&ifp->lock); | |
2214 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2215 | in6_ifa_put(ifp); | |
2216 | } | |
2217 | } | |
2218 | } | |
1ab1457c | 2219 | } |
1da177e4 | 2220 | } |
0be669bb | 2221 | #endif |
1da177e4 LT |
2222 | |
2223 | static void init_loopback(struct net_device *dev) | |
2224 | { | |
2225 | struct inet6_dev *idev; | |
2226 | struct inet6_ifaddr * ifp; | |
2227 | ||
2228 | /* ::1 */ | |
2229 | ||
2230 | ASSERT_RTNL(); | |
2231 | ||
2232 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2233 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2234 | return; | |
2235 | } | |
2236 | ||
2237 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2238 | if (!IS_ERR(ifp)) { | |
2239 | spin_lock_bh(&ifp->lock); | |
2240 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2241 | spin_unlock_bh(&ifp->lock); | |
2242 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2243 | in6_ifa_put(ifp); | |
2244 | } | |
2245 | } | |
2246 | ||
2247 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2248 | { | |
2249 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2250 | u32 addr_flags = IFA_F_PERMANENT; |
2251 | ||
2252 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2253 | if (idev->cnf.optimistic_dad && | |
2254 | !ipv6_devconf.forwarding) | |
2255 | addr_flags |= IFA_F_OPTIMISTIC; | |
2256 | #endif | |
1da177e4 | 2257 | |
95c385b4 NH |
2258 | |
2259 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2260 | if (!IS_ERR(ifp)) { |
46d48046 | 2261 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2262 | addrconf_dad_start(ifp, 0); |
2263 | in6_ifa_put(ifp); | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | static void addrconf_dev_config(struct net_device *dev) | |
2268 | { | |
2269 | struct in6_addr addr; | |
2270 | struct inet6_dev * idev; | |
2271 | ||
2272 | ASSERT_RTNL(); | |
2273 | ||
74235a25 HX |
2274 | if ((dev->type != ARPHRD_ETHER) && |
2275 | (dev->type != ARPHRD_FDDI) && | |
2276 | (dev->type != ARPHRD_IEEE802_TR) && | |
2277 | (dev->type != ARPHRD_ARCNET) && | |
2278 | (dev->type != ARPHRD_INFINIBAND)) { | |
2279 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2280 | return; | |
2281 | } | |
2282 | ||
1da177e4 LT |
2283 | idev = addrconf_add_dev(dev); |
2284 | if (idev == NULL) | |
2285 | return; | |
2286 | ||
2287 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2288 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2289 | ||
2290 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2291 | addrconf_add_linklocal(idev, &addr); | |
2292 | } | |
2293 | ||
0be669bb | 2294 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2295 | static void addrconf_sit_config(struct net_device *dev) |
2296 | { | |
2297 | struct inet6_dev *idev; | |
2298 | ||
2299 | ASSERT_RTNL(); | |
2300 | ||
1ab1457c YH |
2301 | /* |
2302 | * Configure the tunnel with one of our IPv4 | |
2303 | * addresses... we should configure all of | |
1da177e4 LT |
2304 | * our v4 addrs in the tunnel |
2305 | */ | |
2306 | ||
2307 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2308 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2309 | return; | |
2310 | } | |
2311 | ||
c7dc89c0 FT |
2312 | if (dev->priv_flags & IFF_ISATAP) { |
2313 | struct in6_addr addr; | |
2314 | ||
2315 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2316 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2317 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2318 | addrconf_add_linklocal(idev, &addr); | |
2319 | return; | |
2320 | } | |
2321 | ||
1da177e4 LT |
2322 | sit_add_v4_addrs(idev); |
2323 | ||
2324 | if (dev->flags&IFF_POINTOPOINT) { | |
2325 | addrconf_add_mroute(dev); | |
2326 | addrconf_add_lroute(dev); | |
2327 | } else | |
2328 | sit_route_add(dev); | |
2329 | } | |
0be669bb | 2330 | #endif |
1da177e4 LT |
2331 | |
2332 | static inline int | |
2333 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2334 | { | |
2335 | struct in6_addr lladdr; | |
2336 | ||
95c385b4 | 2337 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2338 | addrconf_add_linklocal(idev, &lladdr); |
2339 | return 0; | |
2340 | } | |
2341 | return -1; | |
2342 | } | |
2343 | ||
2344 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2345 | { | |
2346 | struct net_device *link_dev; | |
c346dca1 | 2347 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2348 | |
2349 | /* first try to inherit the link-local address from the link device */ | |
2350 | if (idev->dev->iflink && | |
6fda7350 | 2351 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2352 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2353 | return; | |
2354 | } | |
2355 | /* then try to inherit it from any device */ | |
6fda7350 | 2356 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2357 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2358 | return; | |
2359 | } | |
2360 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2365 | * DHCPv6, MLD etc. can be run over the virtual link | |
2366 | */ | |
2367 | ||
2368 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2369 | { | |
2370 | struct inet6_dev *idev; | |
2371 | ||
2372 | ASSERT_RTNL(); | |
2373 | ||
2374 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2375 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2376 | return; | |
2377 | } | |
2378 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2379 | } |
2380 | ||
1ab1457c | 2381 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2382 | void * data) |
2383 | { | |
2384 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2385 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2386 | int run_pending = 0; |
b217d616 | 2387 | int err; |
1da177e4 LT |
2388 | |
2389 | switch(event) { | |
45ba9dd2 | 2390 | case NETDEV_REGISTER: |
74235a25 | 2391 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2392 | idev = ipv6_add_dev(dev); |
2393 | if (!idev) | |
b217d616 | 2394 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2395 | } |
2396 | break; | |
1da177e4 | 2397 | case NETDEV_UP: |
3c21edbd | 2398 | case NETDEV_CHANGE: |
c2edacf8 JV |
2399 | if (dev->flags & IFF_SLAVE) |
2400 | break; | |
2401 | ||
3c21edbd | 2402 | if (event == NETDEV_UP) { |
f24e3d65 | 2403 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2404 | /* device is not ready yet. */ |
2405 | printk(KERN_INFO | |
2406 | "ADDRCONF(NETDEV_UP): %s: " | |
2407 | "link is not ready\n", | |
2408 | dev->name); | |
2409 | break; | |
2410 | } | |
99081049 | 2411 | |
d31c7b8f EP |
2412 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2413 | idev = ipv6_add_dev(dev); | |
2414 | ||
99081049 KS |
2415 | if (idev) |
2416 | idev->if_flags |= IF_READY; | |
3c21edbd | 2417 | } else { |
f24e3d65 | 2418 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2419 | /* device is still not ready. */ |
2420 | break; | |
2421 | } | |
2422 | ||
2423 | if (idev) { | |
2424 | if (idev->if_flags & IF_READY) { | |
2425 | /* device is already configured. */ | |
2426 | break; | |
2427 | } | |
2428 | idev->if_flags |= IF_READY; | |
2429 | } | |
2430 | ||
2431 | printk(KERN_INFO | |
2432 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2433 | "link becomes ready\n", | |
2434 | dev->name); | |
2435 | ||
c5e33bdd | 2436 | run_pending = 1; |
3c21edbd YH |
2437 | } |
2438 | ||
1da177e4 | 2439 | switch(dev->type) { |
0be669bb | 2440 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2441 | case ARPHRD_SIT: |
2442 | addrconf_sit_config(dev); | |
2443 | break; | |
0be669bb | 2444 | #endif |
1da177e4 LT |
2445 | case ARPHRD_TUNNEL6: |
2446 | addrconf_ip6_tnl_config(dev); | |
2447 | break; | |
2448 | case ARPHRD_LOOPBACK: | |
2449 | init_loopback(dev); | |
2450 | break; | |
2451 | ||
2452 | default: | |
2453 | addrconf_dev_config(dev); | |
2454 | break; | |
3ff50b79 | 2455 | } |
1da177e4 | 2456 | if (idev) { |
c5e33bdd YH |
2457 | if (run_pending) |
2458 | addrconf_dad_run(idev); | |
2459 | ||
1da177e4 LT |
2460 | /* If the MTU changed during the interface down, when the |
2461 | interface up, the changed MTU must be reflected in the | |
2462 | idev as well as routers. | |
2463 | */ | |
2464 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2465 | rt6_mtu_change(dev, dev->mtu); | |
2466 | idev->cnf.mtu6 = dev->mtu; | |
2467 | } | |
2468 | idev->tstamp = jiffies; | |
2469 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2470 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2471 | stop IPv6 on this interface. | |
2472 | */ | |
2473 | if (dev->mtu < IPV6_MIN_MTU) | |
2474 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2475 | } | |
2476 | break; | |
2477 | ||
2478 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2479 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2480 | rt6_mtu_change(dev, dev->mtu); |
2481 | idev->cnf.mtu6 = dev->mtu; | |
2482 | break; | |
2483 | } | |
2484 | ||
d31c7b8f EP |
2485 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2486 | idev = ipv6_add_dev(dev); | |
2487 | if (idev) | |
2488 | break; | |
2489 | } | |
2490 | ||
1da177e4 LT |
2491 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2492 | ||
2493 | case NETDEV_DOWN: | |
2494 | case NETDEV_UNREGISTER: | |
2495 | /* | |
2496 | * Remove all addresses from this interface. | |
2497 | */ | |
2498 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2499 | break; | |
3c21edbd | 2500 | |
1da177e4 | 2501 | case NETDEV_CHANGENAME: |
1da177e4 | 2502 | if (idev) { |
5632c515 | 2503 | snmp6_unregister_dev(idev); |
408c4768 | 2504 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2505 | addrconf_sysctl_register(idev); |
b217d616 HX |
2506 | err = snmp6_register_dev(idev); |
2507 | if (err) | |
2508 | return notifier_from_errno(err); | |
5632c515 | 2509 | } |
1da177e4 | 2510 | break; |
3ff50b79 | 2511 | } |
1da177e4 LT |
2512 | |
2513 | return NOTIFY_OK; | |
2514 | } | |
2515 | ||
2516 | /* | |
2517 | * addrconf module should be notified of a device going up | |
2518 | */ | |
2519 | static struct notifier_block ipv6_dev_notf = { | |
2520 | .notifier_call = addrconf_notify, | |
2521 | .priority = 0 | |
2522 | }; | |
2523 | ||
2524 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2525 | { | |
2526 | struct inet6_dev *idev; | |
2527 | struct inet6_ifaddr *ifa, **bifa; | |
c346dca1 | 2528 | struct net *net = dev_net(dev); |
1da177e4 LT |
2529 | int i; |
2530 | ||
2531 | ASSERT_RTNL(); | |
2532 | ||
eb867579 | 2533 | if ((dev->flags & IFF_LOOPBACK) && how == 1) |
1da177e4 LT |
2534 | how = 0; |
2535 | ||
f3db4851 | 2536 | rt6_ifdown(net, dev); |
1da177e4 LT |
2537 | neigh_ifdown(&nd_tbl, dev); |
2538 | ||
2539 | idev = __in6_dev_get(dev); | |
2540 | if (idev == NULL) | |
2541 | return -ENODEV; | |
2542 | ||
2543 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2544 | Do not dev_put! |
1da177e4 | 2545 | */ |
439e2385 | 2546 | if (how) { |
1da177e4 | 2547 | idev->dead = 1; |
8814c4b5 YH |
2548 | |
2549 | /* protected by rtnl_lock */ | |
2550 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2551 | |
2552 | /* Step 1.5: remove snmp6 entry */ | |
2553 | snmp6_unregister_dev(idev); | |
2554 | ||
2555 | } | |
2556 | ||
2557 | /* Step 2: clear hash table */ | |
2558 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2559 | bifa = &inet6_addr_lst[i]; | |
2560 | ||
2561 | write_lock_bh(&addrconf_hash_lock); | |
2562 | while ((ifa = *bifa) != NULL) { | |
2563 | if (ifa->idev == idev) { | |
2564 | *bifa = ifa->lst_next; | |
2565 | ifa->lst_next = NULL; | |
2566 | addrconf_del_timer(ifa); | |
2567 | in6_ifa_put(ifa); | |
2568 | continue; | |
2569 | } | |
2570 | bifa = &ifa->lst_next; | |
2571 | } | |
2572 | write_unlock_bh(&addrconf_hash_lock); | |
2573 | } | |
2574 | ||
2575 | write_lock_bh(&idev->lock); | |
2576 | ||
2577 | /* Step 3: clear flags for stateless addrconf */ | |
439e2385 | 2578 | if (!how) |
3c21edbd | 2579 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2580 | |
2581 | /* Step 4: clear address list */ | |
2582 | #ifdef CONFIG_IPV6_PRIVACY | |
439e2385 | 2583 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2584 | in6_dev_put(idev); |
2585 | ||
2586 | /* clear tempaddr list */ | |
2587 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2588 | idev->tempaddr_list = ifa->tmp_next; | |
2589 | ifa->tmp_next = NULL; | |
2590 | ifa->dead = 1; | |
2591 | write_unlock_bh(&idev->lock); | |
2592 | spin_lock_bh(&ifa->lock); | |
2593 | ||
2594 | if (ifa->ifpub) { | |
2595 | in6_ifa_put(ifa->ifpub); | |
2596 | ifa->ifpub = NULL; | |
2597 | } | |
2598 | spin_unlock_bh(&ifa->lock); | |
2599 | in6_ifa_put(ifa); | |
2600 | write_lock_bh(&idev->lock); | |
2601 | } | |
2602 | #endif | |
2603 | while ((ifa = idev->addr_list) != NULL) { | |
2604 | idev->addr_list = ifa->if_next; | |
2605 | ifa->if_next = NULL; | |
2606 | ifa->dead = 1; | |
2607 | addrconf_del_timer(ifa); | |
2608 | write_unlock_bh(&idev->lock); | |
2609 | ||
2610 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2611 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2612 | in6_ifa_put(ifa); |
2613 | ||
2614 | write_lock_bh(&idev->lock); | |
2615 | } | |
2616 | write_unlock_bh(&idev->lock); | |
2617 | ||
2618 | /* Step 5: Discard multicast list */ | |
2619 | ||
439e2385 | 2620 | if (how) |
1da177e4 LT |
2621 | ipv6_mc_destroy_dev(idev); |
2622 | else | |
2623 | ipv6_mc_down(idev); | |
2624 | ||
1da177e4 | 2625 | idev->tstamp = jiffies; |
1ab1457c | 2626 | |
1da177e4 LT |
2627 | /* Shot the device (if unregistered) */ |
2628 | ||
439e2385 | 2629 | if (how) { |
408c4768 | 2630 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2631 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2632 | neigh_ifdown(&nd_tbl, dev); | |
2633 | in6_dev_put(idev); | |
2634 | } | |
2635 | return 0; | |
2636 | } | |
2637 | ||
2638 | static void addrconf_rs_timer(unsigned long data) | |
2639 | { | |
2640 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2641 | ||
2642 | if (ifp->idev->cnf.forwarding) | |
2643 | goto out; | |
2644 | ||
2645 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2646 | /* | |
2647 | * Announcement received after solicitation | |
2648 | * was sent | |
2649 | */ | |
2650 | goto out; | |
2651 | } | |
2652 | ||
2653 | spin_lock(&ifp->lock); | |
2654 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
1da177e4 LT |
2655 | /* The wait after the last probe can be shorter */ |
2656 | addrconf_mod_timer(ifp, AC_RS, | |
2657 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2658 | ifp->idev->cnf.rtr_solicit_delay : | |
2659 | ifp->idev->cnf.rtr_solicit_interval); | |
2660 | spin_unlock(&ifp->lock); | |
2661 | ||
f3ee4010 | 2662 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2663 | } else { |
2664 | spin_unlock(&ifp->lock); | |
2665 | /* | |
2666 | * Note: we do not support deprecated "all on-link" | |
2667 | * assumption any longer. | |
2668 | */ | |
2669 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2670 | ifp->idev->dev->name); | |
2671 | } | |
2672 | ||
2673 | out: | |
2674 | in6_ifa_put(ifp); | |
2675 | } | |
2676 | ||
2677 | /* | |
2678 | * Duplicate Address Detection | |
2679 | */ | |
3c21edbd YH |
2680 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2681 | { | |
2682 | unsigned long rand_num; | |
2683 | struct inet6_dev *idev = ifp->idev; | |
2684 | ||
95c385b4 NH |
2685 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2686 | rand_num = 0; | |
2687 | else | |
2688 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2689 | ||
3c21edbd YH |
2690 | ifp->probes = idev->cnf.dad_transmits; |
2691 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2692 | } | |
2693 | ||
e431b8c0 | 2694 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2695 | { |
2696 | struct inet6_dev *idev = ifp->idev; | |
2697 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2698 | |
2699 | addrconf_join_solict(dev, &ifp->addr); | |
2700 | ||
1da177e4 | 2701 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2702 | |
2703 | read_lock_bh(&idev->lock); | |
2704 | if (ifp->dead) | |
2705 | goto out; | |
2706 | spin_lock_bh(&ifp->lock); | |
2707 | ||
2708 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2709 | !(ifp->flags&IFA_F_TENTATIVE) || |
2710 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2711 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2712 | spin_unlock_bh(&ifp->lock); |
2713 | read_unlock_bh(&idev->lock); | |
2714 | ||
2715 | addrconf_dad_completed(ifp); | |
2716 | return; | |
2717 | } | |
2718 | ||
6732bade | 2719 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2720 | spin_unlock_bh(&ifp->lock); |
6732bade | 2721 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2722 | /* |
2723 | * If the defice is not ready: | |
2724 | * - keep it tentative if it is a permanent address. | |
2725 | * - otherwise, kill it. | |
2726 | */ | |
2727 | in6_ifa_hold(ifp); | |
2728 | addrconf_dad_stop(ifp); | |
6732bade | 2729 | return; |
3c21edbd | 2730 | } |
95c385b4 NH |
2731 | |
2732 | /* | |
2733 | * Optimistic nodes can start receiving | |
2734 | * Frames right away | |
2735 | */ | |
2736 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2737 | ip6_ins_rt(ifp->rt); | |
2738 | ||
6732bade YH |
2739 | addrconf_dad_kick(ifp); |
2740 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2741 | out: |
2742 | read_unlock_bh(&idev->lock); | |
2743 | } | |
2744 | ||
2745 | static void addrconf_dad_timer(unsigned long data) | |
2746 | { | |
2747 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2748 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2749 | struct in6_addr mcaddr; |
2750 | ||
2751 | read_lock_bh(&idev->lock); | |
2752 | if (idev->dead) { | |
2753 | read_unlock_bh(&idev->lock); | |
2754 | goto out; | |
2755 | } | |
2756 | spin_lock_bh(&ifp->lock); | |
2757 | if (ifp->probes == 0) { | |
2758 | /* | |
2759 | * DAD was successful | |
2760 | */ | |
2761 | ||
95c385b4 | 2762 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2763 | spin_unlock_bh(&ifp->lock); |
2764 | read_unlock_bh(&idev->lock); | |
2765 | ||
2766 | addrconf_dad_completed(ifp); | |
2767 | ||
2768 | goto out; | |
2769 | } | |
2770 | ||
2771 | ifp->probes--; | |
2772 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2773 | spin_unlock_bh(&ifp->lock); | |
2774 | read_unlock_bh(&idev->lock); | |
2775 | ||
2776 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2777 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2778 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2779 | out: |
2780 | in6_ifa_put(ifp); | |
2781 | } | |
2782 | ||
2783 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2784 | { | |
2785 | struct net_device * dev = ifp->idev->dev; | |
2786 | ||
2787 | /* | |
2788 | * Configure the address for reception. Now it is valid. | |
2789 | */ | |
2790 | ||
2791 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2792 | ||
2793 | /* If added prefix is link local and forwarding is off, | |
2794 | start sending router solicitations. | |
2795 | */ | |
2796 | ||
2797 | if (ifp->idev->cnf.forwarding == 0 && | |
2798 | ifp->idev->cnf.rtr_solicits > 0 && | |
2799 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2800 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2801 | /* |
2802 | * If a host as already performed a random delay | |
2803 | * [...] as part of DAD [...] there is no need | |
2804 | * to delay again before sending the first RS | |
2805 | */ | |
f3ee4010 | 2806 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2807 | |
2808 | spin_lock_bh(&ifp->lock); | |
2809 | ifp->probes = 1; | |
2810 | ifp->idev->if_flags |= IF_RS_SENT; | |
2811 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2812 | spin_unlock_bh(&ifp->lock); | |
2813 | } | |
2814 | } | |
2815 | ||
c5e33bdd YH |
2816 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2817 | struct inet6_ifaddr *ifp; | |
2818 | ||
2819 | read_lock_bh(&idev->lock); | |
2820 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2821 | spin_lock_bh(&ifp->lock); | |
2822 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2823 | spin_unlock_bh(&ifp->lock); | |
2824 | continue; | |
2825 | } | |
2826 | spin_unlock_bh(&ifp->lock); | |
2827 | addrconf_dad_kick(ifp); | |
2828 | } | |
2829 | read_unlock_bh(&idev->lock); | |
2830 | } | |
2831 | ||
1da177e4 LT |
2832 | #ifdef CONFIG_PROC_FS |
2833 | struct if6_iter_state { | |
3c40090a | 2834 | struct seq_net_private p; |
1da177e4 LT |
2835 | int bucket; |
2836 | }; | |
2837 | ||
2838 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2839 | { | |
2840 | struct inet6_ifaddr *ifa = NULL; | |
2841 | struct if6_iter_state *state = seq->private; | |
1218854a | 2842 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2843 | |
2844 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2845 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2846 | |
878628fb | 2847 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2848 | ifa = ifa->lst_next; |
1da177e4 LT |
2849 | if (ifa) |
2850 | break; | |
2851 | } | |
2852 | return ifa; | |
2853 | } | |
2854 | ||
2855 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2856 | { | |
2857 | struct if6_iter_state *state = seq->private; | |
1218854a | 2858 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2859 | |
2860 | ifa = ifa->lst_next; | |
2861 | try_again: | |
3c40090a | 2862 | if (ifa) { |
878628fb | 2863 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2864 | ifa = ifa->lst_next; |
2865 | goto try_again; | |
2866 | } | |
2867 | } | |
2868 | ||
1da177e4 LT |
2869 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2870 | ifa = inet6_addr_lst[state->bucket]; | |
2871 | goto try_again; | |
2872 | } | |
3c40090a | 2873 | |
1da177e4 LT |
2874 | return ifa; |
2875 | } | |
2876 | ||
2877 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2878 | { | |
2879 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2880 | ||
2881 | if (ifa) | |
2882 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2883 | --pos; | |
2884 | return pos ? NULL : ifa; | |
2885 | } | |
2886 | ||
2887 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 2888 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
2889 | { |
2890 | read_lock_bh(&addrconf_hash_lock); | |
2891 | return if6_get_idx(seq, *pos); | |
2892 | } | |
2893 | ||
2894 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2895 | { | |
2896 | struct inet6_ifaddr *ifa; | |
2897 | ||
2898 | ifa = if6_get_next(seq, v); | |
2899 | ++*pos; | |
2900 | return ifa; | |
2901 | } | |
2902 | ||
2903 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 2904 | __releases(addrconf_hash_lock) |
1da177e4 LT |
2905 | { |
2906 | read_unlock_bh(&addrconf_hash_lock); | |
2907 | } | |
2908 | ||
2909 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2910 | { | |
2911 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2912 | seq_printf(seq, | |
9343e79a | 2913 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2914 | NIP6(ifp->addr), |
2915 | ifp->idev->dev->ifindex, | |
2916 | ifp->prefix_len, | |
2917 | ifp->scope, | |
2918 | ifp->flags, | |
2919 | ifp->idev->dev->name); | |
2920 | return 0; | |
2921 | } | |
2922 | ||
56b3d975 | 2923 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2924 | .start = if6_seq_start, |
2925 | .next = if6_seq_next, | |
2926 | .show = if6_seq_show, | |
2927 | .stop = if6_seq_stop, | |
2928 | }; | |
2929 | ||
2930 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2931 | { | |
3c40090a DL |
2932 | return seq_open_net(inode, file, &if6_seq_ops, |
2933 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
2934 | } |
2935 | ||
9a32144e | 2936 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2937 | .owner = THIS_MODULE, |
2938 | .open = if6_seq_open, | |
2939 | .read = seq_read, | |
2940 | .llseek = seq_lseek, | |
3c40090a | 2941 | .release = seq_release_net, |
1da177e4 LT |
2942 | }; |
2943 | ||
3c40090a | 2944 | static int if6_proc_net_init(struct net *net) |
1da177e4 | 2945 | { |
3c40090a | 2946 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
2947 | return -ENOMEM; |
2948 | return 0; | |
2949 | } | |
2950 | ||
3c40090a DL |
2951 | static void if6_proc_net_exit(struct net *net) |
2952 | { | |
2953 | proc_net_remove(net, "if_inet6"); | |
2954 | } | |
2955 | ||
2956 | static struct pernet_operations if6_proc_net_ops = { | |
2957 | .init = if6_proc_net_init, | |
2958 | .exit = if6_proc_net_exit, | |
2959 | }; | |
2960 | ||
2961 | int __init if6_proc_init(void) | |
2962 | { | |
2963 | return register_pernet_subsys(&if6_proc_net_ops); | |
2964 | } | |
2965 | ||
1da177e4 LT |
2966 | void if6_proc_exit(void) |
2967 | { | |
3c40090a | 2968 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
2969 | } |
2970 | #endif /* CONFIG_PROC_FS */ | |
2971 | ||
59fbb3a6 | 2972 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 2973 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 2974 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
2975 | { |
2976 | int ret = 0; | |
2977 | struct inet6_ifaddr * ifp; | |
2978 | u8 hash = ipv6_addr_hash(addr); | |
2979 | read_lock_bh(&addrconf_hash_lock); | |
2980 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 2981 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 2982 | continue; |
caad295f | 2983 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
2984 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
2985 | ret = 1; | |
2986 | break; | |
2987 | } | |
2988 | } | |
2989 | read_unlock_bh(&addrconf_hash_lock); | |
2990 | return ret; | |
2991 | } | |
2992 | #endif | |
2993 | ||
1da177e4 LT |
2994 | /* |
2995 | * Periodic address status verification | |
2996 | */ | |
2997 | ||
2998 | static void addrconf_verify(unsigned long foo) | |
2999 | { | |
3000 | struct inet6_ifaddr *ifp; | |
3001 | unsigned long now, next; | |
3002 | int i; | |
3003 | ||
3004 | spin_lock_bh(&addrconf_verify_lock); | |
3005 | now = jiffies; | |
3006 | next = now + ADDR_CHECK_FREQUENCY; | |
3007 | ||
3008 | del_timer(&addr_chk_timer); | |
3009 | ||
3010 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3011 | ||
3012 | restart: | |
5d5780df | 3013 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
3014 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
3015 | unsigned long age; | |
3016 | #ifdef CONFIG_IPV6_PRIVACY | |
3017 | unsigned long regen_advance; | |
3018 | #endif | |
3019 | ||
3020 | if (ifp->flags & IFA_F_PERMANENT) | |
3021 | continue; | |
3022 | ||
3023 | spin_lock(&ifp->lock); | |
3024 | age = (now - ifp->tstamp) / HZ; | |
3025 | ||
3026 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3027 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3028 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3029 | ifp->idev->nd_parms->retrans_time / HZ; |
3030 | #endif | |
3031 | ||
8f27ebb9 YH |
3032 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3033 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3034 | spin_unlock(&ifp->lock); |
3035 | in6_ifa_hold(ifp); | |
5d5780df | 3036 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3037 | ipv6_del_addr(ifp); |
3038 | goto restart; | |
8f27ebb9 YH |
3039 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3040 | spin_unlock(&ifp->lock); | |
3041 | continue; | |
1da177e4 LT |
3042 | } else if (age >= ifp->prefered_lft) { |
3043 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
3044 | int deprecate = 0; | |
3045 | ||
3046 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3047 | deprecate = 1; | |
3048 | ifp->flags |= IFA_F_DEPRECATED; | |
3049 | } | |
3050 | ||
3051 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3052 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3053 | ||
3054 | spin_unlock(&ifp->lock); | |
3055 | ||
3056 | if (deprecate) { | |
3057 | in6_ifa_hold(ifp); | |
5d5780df | 3058 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3059 | |
3060 | ipv6_ifa_notify(0, ifp); | |
3061 | in6_ifa_put(ifp); | |
3062 | goto restart; | |
3063 | } | |
3064 | #ifdef CONFIG_IPV6_PRIVACY | |
3065 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3066 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3067 | if (age >= ifp->prefered_lft - regen_advance) { | |
3068 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3069 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3070 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3071 | if (!ifp->regen_count && ifpub) { | |
3072 | ifp->regen_count++; | |
3073 | in6_ifa_hold(ifp); | |
3074 | in6_ifa_hold(ifpub); | |
3075 | spin_unlock(&ifp->lock); | |
5d5780df | 3076 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3077 | spin_lock(&ifpub->lock); |
3078 | ifpub->regen_count = 0; | |
3079 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3080 | ipv6_create_tempaddr(ifpub, ifp); |
3081 | in6_ifa_put(ifpub); | |
3082 | in6_ifa_put(ifp); | |
3083 | goto restart; | |
3084 | } | |
3085 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3086 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3087 | spin_unlock(&ifp->lock); | |
3088 | #endif | |
3089 | } else { | |
3090 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3091 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3092 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3093 | spin_unlock(&ifp->lock); | |
3094 | } | |
3095 | } | |
5d5780df | 3096 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3097 | } |
3098 | ||
3099 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3100 | add_timer(&addr_chk_timer); | |
3101 | spin_unlock_bh(&addrconf_verify_lock); | |
3102 | } | |
3103 | ||
461d8837 TG |
3104 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3105 | { | |
3106 | struct in6_addr *pfx = NULL; | |
3107 | ||
3108 | if (addr) | |
3109 | pfx = nla_data(addr); | |
3110 | ||
3111 | if (local) { | |
3112 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3113 | pfx = NULL; | |
3114 | else | |
3115 | pfx = nla_data(local); | |
3116 | } | |
3117 | ||
3118 | return pfx; | |
3119 | } | |
3120 | ||
ef7c79ed | 3121 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3122 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3123 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3124 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3125 | }; | |
3126 | ||
1da177e4 LT |
3127 | static int |
3128 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3129 | { | |
3b1e0a65 | 3130 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3131 | struct ifaddrmsg *ifm; |
3132 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3133 | struct in6_addr *pfx; |
b933f716 | 3134 | int err; |
1da177e4 | 3135 | |
b933f716 TG |
3136 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3137 | if (err < 0) | |
3138 | return err; | |
3139 | ||
3140 | ifm = nlmsg_data(nlh); | |
3141 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3142 | if (pfx == NULL) |
3143 | return -EINVAL; | |
3144 | ||
af284937 | 3145 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3146 | } |
3147 | ||
55ebaef1 NT |
3148 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3149 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3150 | { |
46d48046 YH |
3151 | u32 flags = RTF_EXPIRES; |
3152 | ||
081bba5b NT |
3153 | if (!valid_lft || (prefered_lft > valid_lft)) |
3154 | return -EINVAL; | |
3155 | ||
46d48046 | 3156 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 3157 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
3158 | flags = 0; |
3159 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
3160 | valid_lft = 0x7FFFFFFF/HZ; |
3161 | ||
3162 | if (prefered_lft == 0) | |
55ebaef1 | 3163 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
3164 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
3165 | (prefered_lft != INFINITY_LIFE_TIME)) | |
3166 | prefered_lft = 0x7FFFFFFF/HZ; | |
3167 | ||
3168 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3169 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3170 | ifp->tstamp = jiffies; |
3171 | ifp->valid_lft = valid_lft; | |
3172 | ifp->prefered_lft = prefered_lft; | |
3173 | ||
3174 | spin_unlock_bh(&ifp->lock); | |
3175 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3176 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3177 | |
46d48046 YH |
3178 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3179 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3180 | addrconf_verify(0); |
3181 | ||
3182 | return 0; | |
3183 | } | |
3184 | ||
1da177e4 LT |
3185 | static int |
3186 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3187 | { | |
3b1e0a65 | 3188 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3189 | struct ifaddrmsg *ifm; |
3190 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3191 | struct in6_addr *pfx; |
7198f8ce TG |
3192 | struct inet6_ifaddr *ifa; |
3193 | struct net_device *dev; | |
55ebaef1 NT |
3194 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3195 | u8 ifa_flags; | |
461d8837 | 3196 | int err; |
1da177e4 | 3197 | |
461d8837 TG |
3198 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3199 | if (err < 0) | |
3200 | return err; | |
3201 | ||
3202 | ifm = nlmsg_data(nlh); | |
3203 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3204 | if (pfx == NULL) |
3205 | return -EINVAL; | |
3206 | ||
461d8837 | 3207 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3208 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3209 | |
3210 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3211 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3212 | preferred_lft = ci->ifa_prefered; |
3213 | } else { | |
3214 | preferred_lft = INFINITY_LIFE_TIME; | |
3215 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3216 | } |
3217 | ||
af284937 | 3218 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3219 | if (dev == NULL) |
3220 | return -ENODEV; | |
3221 | ||
55ebaef1 | 3222 | /* We ignore other flags so far. */ |
3b9f9a1c | 3223 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3224 | |
1cab3da6 | 3225 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3226 | if (ifa == NULL) { |
3227 | /* | |
3228 | * It would be best to check for !NLM_F_CREATE here but | |
3229 | * userspace alreay relies on not having to provide this. | |
3230 | */ | |
af284937 DL |
3231 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3232 | ifm->ifa_prefixlen, ifa_flags, | |
3233 | preferred_lft, valid_lft); | |
081bba5b NT |
3234 | } |
3235 | ||
7198f8ce TG |
3236 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3237 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3238 | err = -EEXIST; | |
3239 | else | |
55ebaef1 | 3240 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3241 | |
3242 | in6_ifa_put(ifa); | |
3243 | ||
3244 | return err; | |
1da177e4 LT |
3245 | } |
3246 | ||
101bb229 TG |
3247 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3248 | u8 scope, int ifindex) | |
3249 | { | |
3250 | struct ifaddrmsg *ifm; | |
3251 | ||
3252 | ifm = nlmsg_data(nlh); | |
3253 | ifm->ifa_family = AF_INET6; | |
3254 | ifm->ifa_prefixlen = prefixlen; | |
3255 | ifm->ifa_flags = flags; | |
3256 | ifm->ifa_scope = scope; | |
3257 | ifm->ifa_index = ifindex; | |
3258 | } | |
3259 | ||
85486af0 TG |
3260 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3261 | unsigned long tstamp, u32 preferred, u32 valid) | |
3262 | { | |
3263 | struct ifa_cacheinfo ci; | |
3264 | ||
3265 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3266 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3267 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3268 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3269 | ci.ifa_prefered = preferred; | |
3270 | ci.ifa_valid = valid; | |
3271 | ||
3272 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3273 | } | |
3274 | ||
101bb229 TG |
3275 | static inline int rt_scope(int ifa_scope) |
3276 | { | |
3277 | if (ifa_scope & IFA_HOST) | |
3278 | return RT_SCOPE_HOST; | |
3279 | else if (ifa_scope & IFA_LINK) | |
3280 | return RT_SCOPE_LINK; | |
3281 | else if (ifa_scope & IFA_SITE) | |
3282 | return RT_SCOPE_SITE; | |
3283 | else | |
3284 | return RT_SCOPE_UNIVERSE; | |
3285 | } | |
3286 | ||
0ab6803b TG |
3287 | static inline int inet6_ifaddr_msgsize(void) |
3288 | { | |
339bf98f TG |
3289 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3290 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3291 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3292 | } |
c5396a31 | 3293 | |
1da177e4 | 3294 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3295 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3296 | { |
1da177e4 | 3297 | struct nlmsghdr *nlh; |
85486af0 | 3298 | u32 preferred, valid; |
1da177e4 | 3299 | |
0ab6803b TG |
3300 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3301 | if (nlh == NULL) | |
26932566 | 3302 | return -EMSGSIZE; |
0ab6803b | 3303 | |
101bb229 TG |
3304 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3305 | ifa->idev->dev->ifindex); | |
3306 | ||
1da177e4 | 3307 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3308 | preferred = ifa->prefered_lft; |
3309 | valid = ifa->valid_lft; | |
3310 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3311 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3312 | preferred -= tval; |
3313 | if (valid != INFINITY_LIFE_TIME) | |
3314 | valid -= tval; | |
1da177e4 LT |
3315 | } |
3316 | } else { | |
85486af0 TG |
3317 | preferred = INFINITY_LIFE_TIME; |
3318 | valid = INFINITY_LIFE_TIME; | |
3319 | } | |
3320 | ||
0ab6803b | 3321 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3322 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3323 | nlmsg_cancel(skb, nlh); | |
3324 | return -EMSGSIZE; | |
3325 | } | |
1da177e4 | 3326 | |
0ab6803b | 3327 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3328 | } |
3329 | ||
3330 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3331 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3332 | { |
1da177e4 | 3333 | struct nlmsghdr *nlh; |
101bb229 TG |
3334 | u8 scope = RT_SCOPE_UNIVERSE; |
3335 | int ifindex = ifmca->idev->dev->ifindex; | |
3336 | ||
3337 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3338 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3339 | |
0ab6803b TG |
3340 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3341 | if (nlh == NULL) | |
26932566 | 3342 | return -EMSGSIZE; |
85486af0 | 3343 | |
0ab6803b TG |
3344 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3345 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3346 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3347 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3348 | nlmsg_cancel(skb, nlh); | |
3349 | return -EMSGSIZE; | |
3350 | } | |
85486af0 | 3351 | |
0ab6803b | 3352 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3353 | } |
3354 | ||
3355 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3356 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3357 | { |
1da177e4 | 3358 | struct nlmsghdr *nlh; |
101bb229 TG |
3359 | u8 scope = RT_SCOPE_UNIVERSE; |
3360 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3361 | ||
3362 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3363 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3364 | |
0ab6803b TG |
3365 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3366 | if (nlh == NULL) | |
26932566 | 3367 | return -EMSGSIZE; |
85486af0 | 3368 | |
0ab6803b TG |
3369 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3370 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3371 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3372 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3373 | nlmsg_cancel(skb, nlh); | |
3374 | return -EMSGSIZE; | |
3375 | } | |
1da177e4 | 3376 | |
0ab6803b | 3377 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3378 | } |
3379 | ||
3380 | enum addr_type_t | |
3381 | { | |
3382 | UNICAST_ADDR, | |
3383 | MULTICAST_ADDR, | |
3384 | ANYCAST_ADDR, | |
3385 | }; | |
3386 | ||
3387 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3388 | enum addr_type_t type) | |
3389 | { | |
3390 | int idx, ip_idx; | |
3391 | int s_idx, s_ip_idx; | |
3392 | int err = 1; | |
3393 | struct net_device *dev; | |
3394 | struct inet6_dev *idev = NULL; | |
3395 | struct inet6_ifaddr *ifa; | |
3396 | struct ifmcaddr6 *ifmca; | |
3397 | struct ifacaddr6 *ifaca; | |
3b1e0a65 | 3398 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3399 | |
3400 | s_idx = cb->args[0]; | |
3401 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3402 | |
7562f876 | 3403 | idx = 0; |
6fda7350 | 3404 | for_each_netdev(net, dev) { |
1da177e4 | 3405 | if (idx < s_idx) |
7562f876 | 3406 | goto cont; |
1da177e4 LT |
3407 | if (idx > s_idx) |
3408 | s_ip_idx = 0; | |
3409 | ip_idx = 0; | |
3410 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3411 | goto cont; |
1da177e4 LT |
3412 | read_lock_bh(&idev->lock); |
3413 | switch (type) { | |
3414 | case UNICAST_ADDR: | |
ae9cda5d | 3415 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3416 | for (ifa = idev->addr_list; ifa; |
3417 | ifa = ifa->if_next, ip_idx++) { | |
3418 | if (ip_idx < s_ip_idx) | |
3419 | continue; | |
5d5619b4 YH |
3420 | err = inet6_fill_ifaddr(skb, ifa, |
3421 | NETLINK_CB(cb->skb).pid, | |
3422 | cb->nlh->nlmsg_seq, | |
3423 | RTM_NEWADDR, | |
3424 | NLM_F_MULTI); | |
1da177e4 | 3425 | } |
1da177e4 LT |
3426 | break; |
3427 | case MULTICAST_ADDR: | |
3428 | /* multicast address */ | |
1ab1457c | 3429 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3430 | ifmca = ifmca->next, ip_idx++) { |
3431 | if (ip_idx < s_ip_idx) | |
3432 | continue; | |
5d5619b4 YH |
3433 | err = inet6_fill_ifmcaddr(skb, ifmca, |
3434 | NETLINK_CB(cb->skb).pid, | |
3435 | cb->nlh->nlmsg_seq, | |
3436 | RTM_GETMULTICAST, | |
3437 | NLM_F_MULTI); | |
1da177e4 LT |
3438 | } |
3439 | break; | |
3440 | case ANYCAST_ADDR: | |
3441 | /* anycast address */ | |
3442 | for (ifaca = idev->ac_list; ifaca; | |
3443 | ifaca = ifaca->aca_next, ip_idx++) { | |
3444 | if (ip_idx < s_ip_idx) | |
3445 | continue; | |
5d5619b4 YH |
3446 | err = inet6_fill_ifacaddr(skb, ifaca, |
3447 | NETLINK_CB(cb->skb).pid, | |
3448 | cb->nlh->nlmsg_seq, | |
3449 | RTM_GETANYCAST, | |
3450 | NLM_F_MULTI); | |
1da177e4 LT |
3451 | } |
3452 | break; | |
3453 | default: | |
3454 | break; | |
3455 | } | |
3456 | read_unlock_bh(&idev->lock); | |
3457 | in6_dev_put(idev); | |
5d5619b4 YH |
3458 | |
3459 | if (err <= 0) | |
3460 | break; | |
7562f876 PE |
3461 | cont: |
3462 | idx++; | |
1da177e4 | 3463 | } |
1da177e4 LT |
3464 | cb->args[0] = idx; |
3465 | cb->args[1] = ip_idx; | |
3466 | return skb->len; | |
3467 | } | |
3468 | ||
3469 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3470 | { | |
3471 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3472 | |
1da177e4 LT |
3473 | return inet6_dump_addr(skb, cb, type); |
3474 | } | |
3475 | ||
3476 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3477 | { | |
3478 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3479 | |
1da177e4 LT |
3480 | return inet6_dump_addr(skb, cb, type); |
3481 | } | |
3482 | ||
3483 | ||
3484 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3485 | { | |
3486 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3487 | |
1da177e4 LT |
3488 | return inet6_dump_addr(skb, cb, type); |
3489 | } | |
3490 | ||
1b29fc2c TG |
3491 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3492 | void *arg) | |
6c223828 | 3493 | { |
3b1e0a65 | 3494 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3495 | struct ifaddrmsg *ifm; |
3496 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3497 | struct in6_addr *addr = NULL; |
3498 | struct net_device *dev = NULL; | |
3499 | struct inet6_ifaddr *ifa; | |
3500 | struct sk_buff *skb; | |
6c223828 NT |
3501 | int err; |
3502 | ||
1b29fc2c TG |
3503 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3504 | if (err < 0) | |
3505 | goto errout; | |
3506 | ||
3507 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3508 | if (addr == NULL) { | |
3509 | err = -EINVAL; | |
3510 | goto errout; | |
6c223828 | 3511 | } |
6c223828 | 3512 | |
1b29fc2c | 3513 | ifm = nlmsg_data(nlh); |
6c223828 | 3514 | if (ifm->ifa_index) |
6fda7350 | 3515 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3516 | |
1cab3da6 | 3517 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3518 | err = -EADDRNOTAVAIL; |
3519 | goto errout; | |
3520 | } | |
6c223828 | 3521 | |
0ab6803b | 3522 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3523 | err = -ENOBUFS; |
1b29fc2c | 3524 | goto errout_ifa; |
6c223828 NT |
3525 | } |
3526 | ||
6c223828 NT |
3527 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3528 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3529 | if (err < 0) { |
3530 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3531 | WARN_ON(err == -EMSGSIZE); | |
3532 | kfree_skb(skb); | |
3533 | goto errout_ifa; | |
3534 | } | |
6fda7350 | 3535 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3536 | errout_ifa: |
6c223828 | 3537 | in6_ifa_put(ifa); |
1b29fc2c | 3538 | errout: |
6c223828 | 3539 | return err; |
6c223828 NT |
3540 | } |
3541 | ||
1da177e4 LT |
3542 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3543 | { | |
3544 | struct sk_buff *skb; | |
c346dca1 | 3545 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3546 | int err = -ENOBUFS; |
1da177e4 | 3547 | |
0ab6803b | 3548 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3549 | if (skb == NULL) |
3550 | goto errout; | |
3551 | ||
3552 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3553 | if (err < 0) { |
3554 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3555 | WARN_ON(err == -EMSGSIZE); | |
3556 | kfree_skb(skb); | |
3557 | goto errout; | |
3558 | } | |
6fda7350 | 3559 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5d620266 TG |
3560 | errout: |
3561 | if (err < 0) | |
6fda7350 | 3562 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3563 | } |
3564 | ||
b6f99a21 | 3565 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3566 | __s32 *array, int bytes) |
3567 | { | |
04561c1f TG |
3568 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3569 | ||
1da177e4 LT |
3570 | memset(array, 0, bytes); |
3571 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3572 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3573 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3574 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3575 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3576 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3577 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3578 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3579 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3580 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3581 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3582 | #ifdef CONFIG_IPV6_PRIVACY | |
3583 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3584 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3585 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3586 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3587 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3588 | #endif | |
3589 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3590 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3591 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3592 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3593 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3594 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3595 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3596 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3597 | #endif | |
930d6ff2 | 3598 | #endif |
fbea49e1 | 3599 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3600 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3601 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3602 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3603 | #endif | |
7bc570c8 YH |
3604 | #ifdef CONFIG_IPV6_MROUTE |
3605 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3606 | #endif | |
1da177e4 LT |
3607 | } |
3608 | ||
339bf98f TG |
3609 | static inline size_t inet6_if_nlmsg_size(void) |
3610 | { | |
3611 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3612 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3613 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3614 | + nla_total_size(4) /* IFLA_MTU */ | |
3615 | + nla_total_size(4) /* IFLA_LINK */ | |
3616 | + nla_total_size( /* IFLA_PROTINFO */ | |
3617 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3618 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3619 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3620 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3621 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3622 | ); |
3623 | } | |
c5396a31 | 3624 | |
7f7d9a6b HX |
3625 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3626 | int bytes) | |
3627 | { | |
3628 | int i; | |
3629 | int pad = bytes - sizeof(u64) * items; | |
3630 | BUG_ON(pad < 0); | |
3631 | ||
3632 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3633 | put_unaligned(items, &stats[0]); | |
3634 | for (i = 1; i < items; i++) | |
3635 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3636 | ||
3637 | memset(&stats[items], 0, pad); | |
3638 | } | |
3639 | ||
3640 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3641 | int bytes) | |
3642 | { | |
3643 | switch(attrtype) { | |
3644 | case IFLA_INET6_STATS: | |
3645 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3646 | break; | |
3647 | case IFLA_INET6_ICMP6STATS: | |
3648 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3649 | break; | |
3650 | } | |
3651 | } | |
3652 | ||
1ab1457c | 3653 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3654 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3655 | { |
04561c1f | 3656 | struct net_device *dev = idev->dev; |
bf99f1bd | 3657 | struct nlattr *nla; |
04561c1f TG |
3658 | struct ifinfomsg *hdr; |
3659 | struct nlmsghdr *nlh; | |
3660 | void *protoinfo; | |
3661 | struct ifla_cacheinfo ci; | |
3662 | ||
3663 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3664 | if (nlh == NULL) | |
26932566 | 3665 | return -EMSGSIZE; |
04561c1f TG |
3666 | |
3667 | hdr = nlmsg_data(nlh); | |
3668 | hdr->ifi_family = AF_INET6; | |
3669 | hdr->__ifi_pad = 0; | |
3670 | hdr->ifi_type = dev->type; | |
3671 | hdr->ifi_index = dev->ifindex; | |
3672 | hdr->ifi_flags = dev_get_flags(dev); | |
3673 | hdr->ifi_change = 0; | |
3674 | ||
3675 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3676 | |
3677 | if (dev->addr_len) | |
04561c1f | 3678 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3679 | |
04561c1f | 3680 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3681 | if (dev->ifindex != dev->iflink) |
04561c1f | 3682 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3683 | |
04561c1f TG |
3684 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3685 | if (protoinfo == NULL) | |
3686 | goto nla_put_failure; | |
1da177e4 | 3687 | |
04561c1f | 3688 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3689 | |
1da177e4 LT |
3690 | ci.max_reasm_len = IPV6_MAXPLEN; |
3691 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3692 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3693 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3694 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3695 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3696 | ||
bf99f1bd YH |
3697 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3698 | if (nla == NULL) | |
04561c1f | 3699 | goto nla_put_failure; |
bf99f1bd | 3700 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3701 | |
bf99f1bd YH |
3702 | /* XXX - MC not implemented */ |
3703 | ||
3704 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3705 | if (nla == NULL) | |
3706 | goto nla_put_failure; | |
3707 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3708 | ||
3709 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3710 | if (nla == NULL) | |
3711 | goto nla_put_failure; | |
3712 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3713 | |
04561c1f TG |
3714 | nla_nest_end(skb, protoinfo); |
3715 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3716 | |
04561c1f | 3717 | nla_put_failure: |
26932566 PM |
3718 | nlmsg_cancel(skb, nlh); |
3719 | return -EMSGSIZE; | |
1da177e4 LT |
3720 | } |
3721 | ||
3722 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3723 | { | |
3b1e0a65 | 3724 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3725 | int idx, err; |
3726 | int s_idx = cb->args[0]; | |
3727 | struct net_device *dev; | |
3728 | struct inet6_dev *idev; | |
3729 | ||
3730 | read_lock(&dev_base_lock); | |
7562f876 | 3731 | idx = 0; |
6fda7350 | 3732 | for_each_netdev(net, dev) { |
1da177e4 | 3733 | if (idx < s_idx) |
7562f876 | 3734 | goto cont; |
1da177e4 | 3735 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3736 | goto cont; |
1ab1457c | 3737 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3738 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3739 | in6_dev_put(idev); |
3740 | if (err <= 0) | |
3741 | break; | |
7562f876 PE |
3742 | cont: |
3743 | idx++; | |
1da177e4 LT |
3744 | } |
3745 | read_unlock(&dev_base_lock); | |
3746 | cb->args[0] = idx; | |
3747 | ||
3748 | return skb->len; | |
3749 | } | |
3750 | ||
3751 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3752 | { | |
3753 | struct sk_buff *skb; | |
c346dca1 | 3754 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3755 | int err = -ENOBUFS; |
1ab1457c | 3756 | |
339bf98f | 3757 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3758 | if (skb == NULL) |
3759 | goto errout; | |
3760 | ||
3761 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3762 | if (err < 0) { |
3763 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3764 | WARN_ON(err == -EMSGSIZE); | |
3765 | kfree_skb(skb); | |
3766 | goto errout; | |
3767 | } | |
6fda7350 | 3768 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
8d7a76c9 TG |
3769 | errout: |
3770 | if (err < 0) | |
6fda7350 | 3771 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3772 | } |
3773 | ||
339bf98f TG |
3774 | static inline size_t inet6_prefix_nlmsg_size(void) |
3775 | { | |
3776 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3777 | + nla_total_size(sizeof(struct in6_addr)) | |
3778 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3779 | } | |
c5396a31 | 3780 | |
1da177e4 | 3781 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3782 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3783 | int event, unsigned int flags) | |
1da177e4 | 3784 | { |
6051e2f4 TG |
3785 | struct prefixmsg *pmsg; |
3786 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3787 | struct prefix_cacheinfo ci; |
3788 | ||
6051e2f4 TG |
3789 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3790 | if (nlh == NULL) | |
26932566 | 3791 | return -EMSGSIZE; |
6051e2f4 TG |
3792 | |
3793 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3794 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3795 | pmsg->prefix_pad1 = 0; |
3796 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3797 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3798 | pmsg->prefix_len = pinfo->prefix_len; | |
3799 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3800 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3801 | pmsg->prefix_flags = 0; |
3802 | if (pinfo->onlink) | |
3803 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3804 | if (pinfo->autoconf) | |
3805 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3806 | ||
6051e2f4 | 3807 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3808 | |
3809 | ci.preferred_time = ntohl(pinfo->prefered); | |
3810 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3811 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3812 | |
6051e2f4 | 3813 | return nlmsg_end(skb, nlh); |
1da177e4 | 3814 | |
6051e2f4 | 3815 | nla_put_failure: |
26932566 PM |
3816 | nlmsg_cancel(skb, nlh); |
3817 | return -EMSGSIZE; | |
1da177e4 LT |
3818 | } |
3819 | ||
1ab1457c | 3820 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3821 | struct prefix_info *pinfo) |
3822 | { | |
3823 | struct sk_buff *skb; | |
c346dca1 | 3824 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3825 | int err = -ENOBUFS; |
1da177e4 | 3826 | |
339bf98f | 3827 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3828 | if (skb == NULL) |
3829 | goto errout; | |
3830 | ||
3831 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3832 | if (err < 0) { |
3833 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3834 | WARN_ON(err == -EMSGSIZE); | |
3835 | kfree_skb(skb); | |
3836 | goto errout; | |
3837 | } | |
6fda7350 | 3838 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
8c384bfa TG |
3839 | errout: |
3840 | if (err < 0) | |
6fda7350 | 3841 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3842 | } |
3843 | ||
1da177e4 LT |
3844 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3845 | { | |
3846 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3847 | ||
3848 | switch (event) { | |
3849 | case RTM_NEWADDR: | |
95c385b4 NH |
3850 | /* |
3851 | * If the address was optimistic | |
3852 | * we inserted the route at the start of | |
3853 | * our DAD process, so we don't need | |
3854 | * to do it again | |
3855 | */ | |
3856 | if (!(ifp->rt->rt6i_node)) | |
3857 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3858 | if (ifp->idev->cnf.forwarding) |
3859 | addrconf_join_anycast(ifp); | |
3860 | break; | |
3861 | case RTM_DELADDR: | |
3862 | if (ifp->idev->cnf.forwarding) | |
3863 | addrconf_leave_anycast(ifp); | |
3864 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3865 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3866 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3867 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3868 | break; |
3869 | } | |
3870 | } | |
3871 | ||
3872 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3873 | { | |
8814c4b5 | 3874 | rcu_read_lock_bh(); |
1da177e4 LT |
3875 | if (likely(ifp->idev->dead == 0)) |
3876 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3877 | rcu_read_unlock_bh(); |
1da177e4 LT |
3878 | } |
3879 | ||
3880 | #ifdef CONFIG_SYSCTL | |
3881 | ||
3882 | static | |
3883 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3884 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3885 | { | |
3886 | int *valp = ctl->data; | |
3887 | int val = *valp; | |
3888 | int ret; | |
3889 | ||
3890 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3891 | ||
c8fecf22 PE |
3892 | if (write) |
3893 | addrconf_fixup_forwarding(ctl, valp, val); | |
1ab1457c | 3894 | return ret; |
1da177e4 LT |
3895 | } |
3896 | ||
1ab1457c | 3897 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3898 | int __user *name, int nlen, |
3899 | void __user *oldval, | |
3900 | size_t __user *oldlenp, | |
1f29bcd7 | 3901 | void __user *newval, size_t newlen) |
1da177e4 LT |
3902 | { |
3903 | int *valp = table->data; | |
c8fecf22 | 3904 | int val = *valp; |
1da177e4 LT |
3905 | int new; |
3906 | ||
3907 | if (!newval || !newlen) | |
3908 | return 0; | |
3909 | if (newlen != sizeof(int)) | |
3910 | return -EINVAL; | |
3911 | if (get_user(new, (int __user *)newval)) | |
3912 | return -EFAULT; | |
3913 | if (new == *valp) | |
3914 | return 0; | |
3915 | if (oldval && oldlenp) { | |
3916 | size_t len; | |
3917 | if (get_user(len, oldlenp)) | |
3918 | return -EFAULT; | |
3919 | if (len) { | |
3920 | if (len > table->maxlen) | |
3921 | len = table->maxlen; | |
3922 | if (copy_to_user(oldval, valp, len)) | |
3923 | return -EFAULT; | |
3924 | if (put_user(len, oldlenp)) | |
3925 | return -EFAULT; | |
3926 | } | |
3927 | } | |
3928 | ||
c8fecf22 PE |
3929 | *valp = new; |
3930 | addrconf_fixup_forwarding(table, valp, val); | |
1da177e4 LT |
3931 | return 1; |
3932 | } | |
3933 | ||
3934 | static struct addrconf_sysctl_table | |
3935 | { | |
3936 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 3937 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 3938 | char *dev_name; |
ab32ea5d | 3939 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3940 | .sysctl_header = NULL, |
3941 | .addrconf_vars = { | |
1ab1457c | 3942 | { |
1da177e4 LT |
3943 | .ctl_name = NET_IPV6_FORWARDING, |
3944 | .procname = "forwarding", | |
1ab1457c | 3945 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3946 | .maxlen = sizeof(int), |
3947 | .mode = 0644, | |
1ab1457c | 3948 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3949 | .strategy = &addrconf_sysctl_forward_strategy, |
3950 | }, | |
3951 | { | |
3952 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3953 | .procname = "hop_limit", | |
1ab1457c | 3954 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3955 | .maxlen = sizeof(int), |
3956 | .mode = 0644, | |
3957 | .proc_handler = proc_dointvec, | |
3958 | }, | |
3959 | { | |
3960 | .ctl_name = NET_IPV6_MTU, | |
3961 | .procname = "mtu", | |
3962 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3963 | .maxlen = sizeof(int), |
1da177e4 | 3964 | .mode = 0644, |
1ab1457c | 3965 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3966 | }, |
3967 | { | |
3968 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3969 | .procname = "accept_ra", | |
1ab1457c | 3970 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3971 | .maxlen = sizeof(int), |
3972 | .mode = 0644, | |
1ab1457c | 3973 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3974 | }, |
3975 | { | |
3976 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3977 | .procname = "accept_redirects", | |
1ab1457c | 3978 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3979 | .maxlen = sizeof(int), |
3980 | .mode = 0644, | |
1ab1457c | 3981 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3982 | }, |
3983 | { | |
3984 | .ctl_name = NET_IPV6_AUTOCONF, | |
3985 | .procname = "autoconf", | |
1ab1457c | 3986 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3987 | .maxlen = sizeof(int), |
3988 | .mode = 0644, | |
1ab1457c | 3989 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3990 | }, |
3991 | { | |
3992 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3993 | .procname = "dad_transmits", | |
1ab1457c | 3994 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3995 | .maxlen = sizeof(int), |
3996 | .mode = 0644, | |
1ab1457c | 3997 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3998 | }, |
3999 | { | |
4000 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
4001 | .procname = "router_solicitations", | |
1ab1457c | 4002 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
4003 | .maxlen = sizeof(int), |
4004 | .mode = 0644, | |
1ab1457c | 4005 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4006 | }, |
4007 | { | |
4008 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
4009 | .procname = "router_solicitation_interval", | |
1ab1457c | 4010 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
4011 | .maxlen = sizeof(int), |
4012 | .mode = 0644, | |
1ab1457c | 4013 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
4014 | .strategy = &sysctl_jiffies, |
4015 | }, | |
4016 | { | |
4017 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
4018 | .procname = "router_solicitation_delay", | |
1ab1457c | 4019 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
4020 | .maxlen = sizeof(int), |
4021 | .mode = 0644, | |
1ab1457c | 4022 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
4023 | .strategy = &sysctl_jiffies, |
4024 | }, | |
4025 | { | |
4026 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
4027 | .procname = "force_mld_version", | |
1ab1457c | 4028 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
4029 | .maxlen = sizeof(int), |
4030 | .mode = 0644, | |
1ab1457c | 4031 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4032 | }, |
4033 | #ifdef CONFIG_IPV6_PRIVACY | |
4034 | { | |
4035 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
4036 | .procname = "use_tempaddr", | |
1ab1457c | 4037 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
4038 | .maxlen = sizeof(int), |
4039 | .mode = 0644, | |
1ab1457c | 4040 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4041 | }, |
4042 | { | |
4043 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
4044 | .procname = "temp_valid_lft", | |
1ab1457c | 4045 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
4046 | .maxlen = sizeof(int), |
4047 | .mode = 0644, | |
1ab1457c | 4048 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4049 | }, |
4050 | { | |
4051 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
4052 | .procname = "temp_prefered_lft", | |
1ab1457c | 4053 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4054 | .maxlen = sizeof(int), |
4055 | .mode = 0644, | |
1ab1457c | 4056 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4057 | }, |
4058 | { | |
4059 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
4060 | .procname = "regen_max_retry", | |
1ab1457c | 4061 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4062 | .maxlen = sizeof(int), |
4063 | .mode = 0644, | |
1ab1457c | 4064 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4065 | }, |
4066 | { | |
4067 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
4068 | .procname = "max_desync_factor", | |
1ab1457c | 4069 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4070 | .maxlen = sizeof(int), |
4071 | .mode = 0644, | |
1ab1457c | 4072 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4073 | }, |
4074 | #endif | |
4075 | { | |
4076 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
4077 | .procname = "max_addresses", | |
4078 | .data = &ipv6_devconf.max_addresses, | |
4079 | .maxlen = sizeof(int), | |
4080 | .mode = 0644, | |
4081 | .proc_handler = &proc_dointvec, | |
4082 | }, | |
65f5c7c1 YH |
4083 | { |
4084 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
4085 | .procname = "accept_ra_defrtr", | |
1ab1457c | 4086 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4087 | .maxlen = sizeof(int), |
4088 | .mode = 0644, | |
1ab1457c | 4089 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 4090 | }, |
c4fd30eb YH |
4091 | { |
4092 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
4093 | .procname = "accept_ra_pinfo", | |
1ab1457c | 4094 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4095 | .maxlen = sizeof(int), |
4096 | .mode = 0644, | |
1ab1457c | 4097 | .proc_handler = &proc_dointvec, |
c4fd30eb | 4098 | }, |
930d6ff2 YH |
4099 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4100 | { | |
4101 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
4102 | .procname = "accept_ra_rtr_pref", | |
4103 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4104 | .maxlen = sizeof(int), | |
4105 | .mode = 0644, | |
4106 | .proc_handler = &proc_dointvec, | |
4107 | }, | |
52e16356 YH |
4108 | { |
4109 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
4110 | .procname = "router_probe_interval", | |
4111 | .data = &ipv6_devconf.rtr_probe_interval, | |
4112 | .maxlen = sizeof(int), | |
4113 | .mode = 0644, | |
4114 | .proc_handler = &proc_dointvec_jiffies, | |
4115 | .strategy = &sysctl_jiffies, | |
4116 | }, | |
fa03ef38 | 4117 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4118 | { |
4119 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4120 | .procname = "accept_ra_rt_info_max_plen", | |
4121 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4122 | .maxlen = sizeof(int), | |
4123 | .mode = 0644, | |
4124 | .proc_handler = &proc_dointvec, | |
4125 | }, | |
4126 | #endif | |
930d6ff2 | 4127 | #endif |
fbea49e1 YH |
4128 | { |
4129 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4130 | .procname = "proxy_ndp", | |
4131 | .data = &ipv6_devconf.proxy_ndp, | |
4132 | .maxlen = sizeof(int), | |
4133 | .mode = 0644, | |
4134 | .proc_handler = &proc_dointvec, | |
4135 | }, | |
0bcbc926 YH |
4136 | { |
4137 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4138 | .procname = "accept_source_route", | |
4139 | .data = &ipv6_devconf.accept_source_route, | |
4140 | .maxlen = sizeof(int), | |
4141 | .mode = 0644, | |
4142 | .proc_handler = &proc_dointvec, | |
4143 | }, | |
95c385b4 NH |
4144 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4145 | { | |
4146 | .ctl_name = CTL_UNNUMBERED, | |
4147 | .procname = "optimistic_dad", | |
4148 | .data = &ipv6_devconf.optimistic_dad, | |
4149 | .maxlen = sizeof(int), | |
4150 | .mode = 0644, | |
4151 | .proc_handler = &proc_dointvec, | |
4152 | ||
4153 | }, | |
7bc570c8 YH |
4154 | #endif |
4155 | #ifdef CONFIG_IPV6_MROUTE | |
4156 | { | |
4157 | .ctl_name = CTL_UNNUMBERED, | |
4158 | .procname = "mc_forwarding", | |
4159 | .data = &ipv6_devconf.mc_forwarding, | |
4160 | .maxlen = sizeof(int), | |
4161 | .mode = 0644, | |
4162 | .proc_handler = &proc_dointvec, | |
4163 | }, | |
95c385b4 | 4164 | #endif |
1da177e4 LT |
4165 | { |
4166 | .ctl_name = 0, /* sentinel */ | |
4167 | } | |
4168 | }, | |
1da177e4 LT |
4169 | }; |
4170 | ||
bff16c2f PE |
4171 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4172 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4173 | { |
4174 | int i; | |
1da177e4 | 4175 | struct addrconf_sysctl_table *t; |
1da177e4 | 4176 | |
1dab6222 PE |
4177 | #define ADDRCONF_CTL_PATH_DEV 3 |
4178 | ||
4179 | struct ctl_path addrconf_ctl_path[] = { | |
4180 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4181 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4182 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4183 | { /* to be set */ }, | |
4184 | { }, | |
4185 | }; | |
4186 | ||
4187 | ||
af879cc7 | 4188 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4189 | if (t == NULL) |
f68635e6 PE |
4190 | goto out; |
4191 | ||
1da177e4 LT |
4192 | for (i=0; t->addrconf_vars[i].data; i++) { |
4193 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4194 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4195 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4196 | } |
1da177e4 | 4197 | |
1ab1457c YH |
4198 | /* |
4199 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4200 | * by sysctl and we wouldn't want anyone to change it under our feet |
4201 | * (see SIOCSIFNAME). | |
1ab1457c | 4202 | */ |
1dab6222 PE |
4203 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4204 | if (!t->dev_name) | |
f68635e6 | 4205 | goto free; |
1da177e4 | 4206 | |
1dab6222 PE |
4207 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4208 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4209 | |
bff16c2f | 4210 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4211 | t->addrconf_vars); |
1da177e4 LT |
4212 | if (t->sysctl_header == NULL) |
4213 | goto free_procname; | |
f68635e6 PE |
4214 | |
4215 | p->sysctl = t; | |
95897312 | 4216 | return 0; |
1da177e4 | 4217 | |
f68635e6 | 4218 | free_procname: |
1dab6222 | 4219 | kfree(t->dev_name); |
f68635e6 | 4220 | free: |
1da177e4 | 4221 | kfree(t); |
f68635e6 | 4222 | out: |
95897312 | 4223 | return -ENOBUFS; |
1da177e4 LT |
4224 | } |
4225 | ||
408c4768 PE |
4226 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4227 | { | |
4228 | struct addrconf_sysctl_table *t; | |
4229 | ||
4230 | if (p->sysctl == NULL) | |
4231 | return; | |
4232 | ||
4233 | t = p->sysctl; | |
4234 | p->sysctl = NULL; | |
4235 | unregister_sysctl_table(t->sysctl_header); | |
4236 | kfree(t->dev_name); | |
4237 | kfree(t); | |
4238 | } | |
4239 | ||
f52295a9 PE |
4240 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4241 | { | |
408c4768 PE |
4242 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4243 | NET_IPV6_NEIGH, "ipv6", | |
4244 | &ndisc_ifinfo_sysctl_change, | |
4245 | NULL); | |
c346dca1 | 4246 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
bff16c2f | 4247 | idev->dev->ifindex, idev, &idev->cnf); |
f52295a9 PE |
4248 | } |
4249 | ||
408c4768 | 4250 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4251 | { |
408c4768 PE |
4252 | __addrconf_sysctl_unregister(&idev->cnf); |
4253 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4254 | } |
4255 | ||
4256 | ||
4257 | #endif | |
4258 | ||
e0da5a48 PE |
4259 | static int addrconf_init_net(struct net *net) |
4260 | { | |
4261 | int err; | |
4262 | struct ipv6_devconf *all, *dflt; | |
4263 | ||
4264 | err = -ENOMEM; | |
4265 | all = &ipv6_devconf; | |
4266 | dflt = &ipv6_devconf_dflt; | |
4267 | ||
4268 | if (net != &init_net) { | |
4269 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); | |
4270 | if (all == NULL) | |
4271 | goto err_alloc_all; | |
4272 | ||
4273 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4274 | if (dflt == NULL) | |
4275 | goto err_alloc_dflt; | |
4276 | } | |
4277 | ||
4278 | net->ipv6.devconf_all = all; | |
4279 | net->ipv6.devconf_dflt = dflt; | |
4280 | ||
4281 | #ifdef CONFIG_SYSCTL | |
4282 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, | |
4283 | NULL, all); | |
4284 | if (err < 0) | |
4285 | goto err_reg_all; | |
4286 | ||
4287 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, | |
4288 | NULL, dflt); | |
4289 | if (err < 0) | |
4290 | goto err_reg_dflt; | |
4291 | #endif | |
4292 | return 0; | |
4293 | ||
4294 | #ifdef CONFIG_SYSCTL | |
4295 | err_reg_dflt: | |
4296 | __addrconf_sysctl_unregister(all); | |
4297 | err_reg_all: | |
4298 | kfree(dflt); | |
4299 | #endif | |
4300 | err_alloc_dflt: | |
4301 | kfree(all); | |
4302 | err_alloc_all: | |
4303 | return err; | |
4304 | } | |
4305 | ||
4306 | static void addrconf_exit_net(struct net *net) | |
4307 | { | |
4308 | #ifdef CONFIG_SYSCTL | |
4309 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4310 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4311 | #endif | |
4312 | if (net != &init_net) { | |
4313 | kfree(net->ipv6.devconf_dflt); | |
4314 | kfree(net->ipv6.devconf_all); | |
4315 | } | |
4316 | } | |
4317 | ||
4318 | static struct pernet_operations addrconf_ops = { | |
4319 | .init = addrconf_init_net, | |
4320 | .exit = addrconf_exit_net, | |
4321 | }; | |
4322 | ||
1da177e4 LT |
4323 | /* |
4324 | * Device notifier | |
4325 | */ | |
4326 | ||
4327 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4328 | { | |
1ab1457c | 4329 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4330 | } |
4331 | ||
7159039a YH |
4332 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4333 | ||
1da177e4 LT |
4334 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4335 | { | |
1ab1457c | 4336 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4337 | } |
4338 | ||
7159039a YH |
4339 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4340 | ||
af284937 DL |
4341 | static void addrconf_net_exit(struct net *net) |
4342 | { | |
6fda7350 BT |
4343 | struct net_device *dev; |
4344 | ||
6fda7350 BT |
4345 | rtnl_lock(); |
4346 | /* clean dev list */ | |
4347 | for_each_netdev(net, dev) { | |
4348 | if (__in6_dev_get(dev) == NULL) | |
4349 | continue; | |
4350 | addrconf_ifdown(dev, 1); | |
4351 | } | |
4352 | addrconf_ifdown(net->loopback_dev, 2); | |
4353 | rtnl_unlock(); | |
af284937 DL |
4354 | } |
4355 | ||
4356 | static struct pernet_operations addrconf_net_ops = { | |
af284937 DL |
4357 | .exit = addrconf_net_exit, |
4358 | }; | |
4359 | ||
1da177e4 LT |
4360 | /* |
4361 | * Init / cleanup code | |
4362 | */ | |
4363 | ||
4364 | int __init addrconf_init(void) | |
4365 | { | |
2a8cc6c8 YH |
4366 | int err; |
4367 | ||
4368 | if ((err = ipv6_addr_label_init()) < 0) { | |
4369 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4370 | err); | |
4371 | return err; | |
4372 | } | |
1da177e4 | 4373 | |
e0da5a48 PE |
4374 | register_pernet_subsys(&addrconf_ops); |
4375 | ||
1da177e4 LT |
4376 | /* The addrconf netdev notifier requires that loopback_dev |
4377 | * has it's ipv6 private information allocated and setup | |
4378 | * before it can bring up and give link-local addresses | |
4379 | * to other devices which are up. | |
4380 | * | |
4381 | * Unfortunately, loopback_dev is not necessarily the first | |
4382 | * entry in the global dev_base list of net devices. In fact, | |
4383 | * it is likely to be the very last entry on that list. | |
4384 | * So this causes the notifier registry below to try and | |
4385 | * give link-local addresses to all devices besides loopback_dev | |
4386 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4387 | * devices to fail to get a link-local address. | |
4388 | * | |
4389 | * So, as a temporary fix, allocate the ipv6 structure for | |
4390 | * loopback_dev first by hand. | |
4391 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4392 | * device and it being up should be removed. | |
4393 | */ | |
4394 | rtnl_lock(); | |
2774c7ab | 4395 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4396 | err = -ENOMEM; |
4397 | rtnl_unlock(); | |
4398 | if (err) | |
e0da5a48 | 4399 | goto errlo; |
1da177e4 | 4400 | |
af284937 DL |
4401 | err = register_pernet_device(&addrconf_net_ops); |
4402 | if (err) | |
4403 | return err; | |
4404 | ||
1da177e4 LT |
4405 | register_netdevice_notifier(&ipv6_dev_notf); |
4406 | ||
1da177e4 | 4407 | addrconf_verify(0); |
c127ea2c TG |
4408 | |
4409 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4410 | if (err < 0) | |
4411 | goto errout; | |
4412 | ||
4413 | /* Only the first call to __rtnl_register can fail */ | |
4414 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4415 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4416 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4417 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4418 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4419 | ||
2a8cc6c8 YH |
4420 | ipv6_addr_label_rtnl_register(); |
4421 | ||
1da177e4 | 4422 | return 0; |
c127ea2c TG |
4423 | errout: |
4424 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4425 | errlo: |
4426 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4427 | |
4428 | return err; | |
1da177e4 LT |
4429 | } |
4430 | ||
09f7709f | 4431 | void addrconf_cleanup(void) |
1da177e4 | 4432 | { |
1ab1457c | 4433 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4434 | int i; |
4435 | ||
4436 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
af284937 | 4437 | unregister_pernet_device(&addrconf_net_ops); |
1da177e4 | 4438 | |
e0da5a48 | 4439 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4440 | |
4441 | rtnl_lock(); | |
4442 | ||
1da177e4 LT |
4443 | /* |
4444 | * Check hash table. | |
4445 | */ | |
1da177e4 LT |
4446 | write_lock_bh(&addrconf_hash_lock); |
4447 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4448 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4449 | struct inet6_ifaddr *bifa; | |
4450 | ||
4451 | bifa = ifa; | |
4452 | ifa = ifa->lst_next; | |
4453 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4454 | /* Do not free it; something is wrong. | |
4455 | Now we can investigate it with debugger. | |
4456 | */ | |
4457 | } | |
4458 | } | |
4459 | write_unlock_bh(&addrconf_hash_lock); | |
4460 | ||
4461 | del_timer(&addr_chk_timer); | |
1da177e4 | 4462 | rtnl_unlock(); |
af284937 DL |
4463 | |
4464 | unregister_pernet_subsys(&addrconf_net_ops); | |
1da177e4 | 4465 | } |