Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
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 LT |
224 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
225 | ||
f24e3d65 MC |
226 | /* Check if a valid qdisc is available */ |
227 | static inline int addrconf_qdisc_ok(struct net_device *dev) | |
228 | { | |
229 | return (dev->qdisc != &noop_qdisc); | |
230 | } | |
231 | ||
1da177e4 LT |
232 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
233 | { | |
234 | if (del_timer(&ifp->timer)) | |
235 | __in6_ifa_put(ifp); | |
236 | } | |
237 | ||
238 | enum addrconf_timer_t | |
239 | { | |
240 | AC_NONE, | |
241 | AC_DAD, | |
242 | AC_RS, | |
243 | }; | |
244 | ||
245 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
246 | enum addrconf_timer_t what, | |
247 | unsigned long when) | |
248 | { | |
249 | if (!del_timer(&ifp->timer)) | |
250 | in6_ifa_hold(ifp); | |
251 | ||
252 | switch (what) { | |
253 | case AC_DAD: | |
254 | ifp->timer.function = addrconf_dad_timer; | |
255 | break; | |
256 | case AC_RS: | |
257 | ifp->timer.function = addrconf_rs_timer; | |
258 | break; | |
259 | default:; | |
260 | } | |
261 | ifp->timer.expires = jiffies + when; | |
262 | add_timer(&ifp->timer); | |
263 | } | |
264 | ||
7f7d9a6b HX |
265 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
266 | { | |
7f7d9a6b | 267 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 268 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
269 | goto err_ip; |
270 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 271 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 272 | goto err_icmp; |
14878f75 | 273 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 274 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 275 | goto err_icmpmsg; |
7f7d9a6b HX |
276 | |
277 | return 0; | |
278 | ||
14878f75 DS |
279 | err_icmpmsg: |
280 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
281 | err_icmp: |
282 | snmp_mib_free((void **)idev->stats.ipv6); | |
283 | err_ip: | |
aaf70ec7 | 284 | return -ENOMEM; |
7f7d9a6b HX |
285 | } |
286 | ||
16910b98 | 287 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 288 | { |
14878f75 | 289 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
290 | snmp_mib_free((void **)idev->stats.icmpv6); |
291 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
292 | } |
293 | ||
1da177e4 LT |
294 | /* Nobody refers to this device, we may destroy it. */ |
295 | ||
8814c4b5 YH |
296 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
297 | { | |
298 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
299 | kfree(idev); | |
300 | } | |
301 | ||
1da177e4 LT |
302 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
303 | { | |
304 | struct net_device *dev = idev->dev; | |
305 | BUG_TRAP(idev->addr_list==NULL); | |
306 | BUG_TRAP(idev->mc_list==NULL); | |
307 | #ifdef NET_REFCNT_DEBUG | |
308 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
309 | #endif | |
310 | dev_put(dev); | |
311 | if (!idev->dead) { | |
312 | printk("Freeing alive inet6 device %p\n", idev); | |
313 | return; | |
314 | } | |
315 | snmp6_free_dev(idev); | |
8814c4b5 | 316 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
317 | } |
318 | ||
7159039a YH |
319 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
320 | ||
1da177e4 LT |
321 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
322 | { | |
323 | struct inet6_dev *ndev; | |
d88ae4cc | 324 | struct in6_addr maddr; |
1da177e4 LT |
325 | |
326 | ASSERT_RTNL(); | |
327 | ||
328 | if (dev->mtu < IPV6_MIN_MTU) | |
329 | return NULL; | |
330 | ||
1ab1457c | 331 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 332 | |
1ab1457c YH |
333 | if (ndev == NULL) |
334 | return NULL; | |
322f74a4 IO |
335 | |
336 | rwlock_init(&ndev->lock); | |
337 | ndev->dev = dev; | |
c346dca1 | 338 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
339 | ndev->cnf.mtu6 = dev->mtu; |
340 | ndev->cnf.sysctl = NULL; | |
341 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
342 | if (ndev->nd_parms == NULL) { | |
343 | kfree(ndev); | |
344 | return NULL; | |
345 | } | |
346 | /* We refer to the device */ | |
347 | dev_hold(dev); | |
1da177e4 | 348 | |
322f74a4 IO |
349 | if (snmp6_alloc_dev(ndev) < 0) { |
350 | ADBG((KERN_WARNING | |
351 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 352 | __func__, dev->name)); |
322f74a4 IO |
353 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
354 | ndev->dead = 1; | |
355 | in6_dev_finish_destroy(ndev); | |
356 | return NULL; | |
357 | } | |
1da177e4 | 358 | |
322f74a4 IO |
359 | if (snmp6_register_dev(ndev) < 0) { |
360 | ADBG((KERN_WARNING | |
361 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 362 | __func__, dev->name)); |
322f74a4 IO |
363 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
364 | ndev->dead = 1; | |
365 | in6_dev_finish_destroy(ndev); | |
366 | return NULL; | |
367 | } | |
368 | ||
369 | /* One reference from device. We must do this before | |
370 | * we invoke __ipv6_regen_rndid(). | |
371 | */ | |
372 | in6_dev_hold(ndev); | |
1da177e4 LT |
373 | |
374 | #ifdef CONFIG_IPV6_PRIVACY | |
b24b8a24 | 375 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
376 | if ((dev->flags&IFF_LOOPBACK) || |
377 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
378 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
379 | dev->type == ARPHRD_SIT || | |
380 | #endif | |
381 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
382 | printk(KERN_INFO |
383 | "%s: Disabled Privacy Extensions\n", | |
384 | dev->name); | |
385 | ndev->cnf.use_tempaddr = -1; | |
c7dc89c0 FT |
386 | |
387 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
388 | printk(KERN_INFO | |
389 | "%s: Disabled Multicast RS\n", | |
390 | dev->name); | |
391 | ndev->cnf.rtr_solicits = 0; | |
392 | } | |
322f74a4 IO |
393 | } else { |
394 | in6_dev_hold(ndev); | |
395 | ipv6_regen_rndid((unsigned long) ndev); | |
396 | } | |
1da177e4 LT |
397 | #endif |
398 | ||
f24e3d65 | 399 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
400 | ndev->if_flags |= IF_READY; |
401 | ||
322f74a4 IO |
402 | ipv6_mc_init_dev(ndev); |
403 | ndev->tstamp = jiffies; | |
f52295a9 | 404 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
405 | /* protected by rtnl_lock */ |
406 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
407 | |
408 | /* Join all-node multicast group */ | |
409 | ipv6_addr_all_nodes(&maddr); | |
410 | ipv6_dev_mc_inc(dev, &maddr); | |
411 | ||
1da177e4 LT |
412 | return ndev; |
413 | } | |
414 | ||
7bc570c8 | 415 | struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
416 | { |
417 | struct inet6_dev *idev; | |
418 | ||
419 | ASSERT_RTNL(); | |
420 | ||
421 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
422 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
423 | return NULL; | |
424 | } | |
c5e33bdd | 425 | |
1da177e4 LT |
426 | if (dev->flags&IFF_UP) |
427 | ipv6_mc_up(idev); | |
428 | return idev; | |
429 | } | |
430 | ||
431 | #ifdef CONFIG_SYSCTL | |
432 | static void dev_forward_change(struct inet6_dev *idev) | |
433 | { | |
434 | struct net_device *dev; | |
435 | struct inet6_ifaddr *ifa; | |
436 | struct in6_addr addr; | |
437 | ||
438 | if (!idev) | |
439 | return; | |
440 | dev = idev->dev; | |
441 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
442 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 443 | |
1da177e4 LT |
444 | if (idev->cnf.forwarding) |
445 | ipv6_dev_mc_inc(dev, &addr); | |
446 | else | |
447 | ipv6_dev_mc_dec(dev, &addr); | |
448 | } | |
449 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
450 | if (ifa->flags&IFA_F_TENTATIVE) |
451 | continue; | |
1da177e4 LT |
452 | if (idev->cnf.forwarding) |
453 | addrconf_join_anycast(ifa); | |
454 | else | |
455 | addrconf_leave_anycast(ifa); | |
456 | } | |
457 | } | |
458 | ||
459 | ||
e186932b | 460 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
461 | { |
462 | struct net_device *dev; | |
463 | struct inet6_dev *idev; | |
464 | ||
465 | read_lock(&dev_base_lock); | |
bff16c2f | 466 | for_each_netdev(net, dev) { |
8814c4b5 | 467 | rcu_read_lock(); |
1da177e4 LT |
468 | idev = __in6_dev_get(dev); |
469 | if (idev) { | |
e186932b PE |
470 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
471 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
472 | if (changed) |
473 | dev_forward_change(idev); | |
474 | } | |
8814c4b5 | 475 | rcu_read_unlock(); |
1da177e4 LT |
476 | } |
477 | read_unlock(&dev_base_lock); | |
478 | } | |
c8fecf22 PE |
479 | |
480 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) | |
481 | { | |
bff16c2f PE |
482 | struct net *net; |
483 | ||
484 | net = (struct net *)table->extra2; | |
441fc2a2 | 485 | if (p == &net->ipv6.devconf_dflt->forwarding) |
c8fecf22 PE |
486 | return; |
487 | ||
e186932b PE |
488 | if (p == &net->ipv6.devconf_all->forwarding) { |
489 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
490 | net->ipv6.devconf_dflt->forwarding = newf; | |
491 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
492 | } else if ((!*p) ^ (!old)) |
493 | dev_forward_change((struct inet6_dev *)table->extra1); | |
494 | ||
495 | if (*p) | |
7b4da532 | 496 | rt6_purge_dflt_routers(net); |
c8fecf22 | 497 | } |
1da177e4 LT |
498 | #endif |
499 | ||
500 | /* Nobody refers to this ifaddr, destroy it */ | |
501 | ||
502 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
503 | { | |
504 | BUG_TRAP(ifp->if_next==NULL); | |
505 | BUG_TRAP(ifp->lst_next==NULL); | |
506 | #ifdef NET_REFCNT_DEBUG | |
507 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
508 | #endif | |
509 | ||
510 | in6_dev_put(ifp->idev); | |
511 | ||
512 | if (del_timer(&ifp->timer)) | |
513 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
514 | ||
515 | if (!ifp->dead) { | |
516 | printk("Freeing alive inet6 address %p\n", ifp); | |
517 | return; | |
518 | } | |
519 | dst_release(&ifp->rt->u.dst); | |
520 | ||
521 | kfree(ifp); | |
522 | } | |
523 | ||
e55ffac6 BH |
524 | static void |
525 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
526 | { | |
527 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 528 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
529 | |
530 | /* | |
531 | * Each device address list is sorted in order of scope - | |
532 | * global before linklocal. | |
533 | */ | |
534 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
535 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 536 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
537 | break; |
538 | } | |
539 | ||
540 | ifp->if_next = *ifap; | |
541 | *ifap = ifp; | |
542 | } | |
543 | ||
1da177e4 LT |
544 | /* On success it returns ifp with increased reference count */ |
545 | ||
546 | static struct inet6_ifaddr * | |
547 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 548 | int scope, u32 flags) |
1da177e4 LT |
549 | { |
550 | struct inet6_ifaddr *ifa = NULL; | |
551 | struct rt6_info *rt; | |
552 | int hash; | |
553 | int err = 0; | |
554 | ||
8814c4b5 | 555 | rcu_read_lock_bh(); |
1da177e4 LT |
556 | if (idev->dead) { |
557 | err = -ENODEV; /*XXX*/ | |
558 | goto out2; | |
559 | } | |
560 | ||
561 | write_lock(&addrconf_hash_lock); | |
562 | ||
563 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 564 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
565 | ADBG(("ipv6_add_addr: already assigned\n")); |
566 | err = -EEXIST; | |
567 | goto out; | |
568 | } | |
569 | ||
322f74a4 | 570 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
571 | |
572 | if (ifa == NULL) { | |
573 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
574 | err = -ENOBUFS; | |
575 | goto out; | |
576 | } | |
577 | ||
578 | rt = addrconf_dst_alloc(idev, addr, 0); | |
579 | if (IS_ERR(rt)) { | |
580 | err = PTR_ERR(rt); | |
581 | goto out; | |
582 | } | |
583 | ||
1da177e4 LT |
584 | ipv6_addr_copy(&ifa->addr, addr); |
585 | ||
586 | spin_lock_init(&ifa->lock); | |
587 | init_timer(&ifa->timer); | |
588 | ifa->timer.data = (unsigned long) ifa; | |
589 | ifa->scope = scope; | |
590 | ifa->prefix_len = pfxlen; | |
591 | ifa->flags = flags | IFA_F_TENTATIVE; | |
592 | ifa->cstamp = ifa->tstamp = jiffies; | |
593 | ||
57f5f544 KF |
594 | ifa->rt = rt; |
595 | ||
95c385b4 NH |
596 | /* |
597 | * part one of RFC 4429, section 3.3 | |
598 | * We should not configure an address as | |
599 | * optimistic if we do not yet know the link | |
600 | * layer address of our nexhop router | |
601 | */ | |
602 | ||
603 | if (rt->rt6i_nexthop == NULL) | |
604 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
605 | ||
1da177e4 LT |
606 | ifa->idev = idev; |
607 | in6_dev_hold(idev); | |
608 | /* For caller */ | |
609 | in6_ifa_hold(ifa); | |
610 | ||
611 | /* Add to big hash table */ | |
612 | hash = ipv6_addr_hash(addr); | |
613 | ||
614 | ifa->lst_next = inet6_addr_lst[hash]; | |
615 | inet6_addr_lst[hash] = ifa; | |
616 | in6_ifa_hold(ifa); | |
617 | write_unlock(&addrconf_hash_lock); | |
618 | ||
619 | write_lock(&idev->lock); | |
620 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 621 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
622 | |
623 | #ifdef CONFIG_IPV6_PRIVACY | |
624 | if (ifa->flags&IFA_F_TEMPORARY) { | |
625 | ifa->tmp_next = idev->tempaddr_list; | |
626 | idev->tempaddr_list = ifa; | |
627 | in6_ifa_hold(ifa); | |
628 | } | |
629 | #endif | |
630 | ||
1da177e4 LT |
631 | in6_ifa_hold(ifa); |
632 | write_unlock(&idev->lock); | |
633 | out2: | |
8814c4b5 | 634 | rcu_read_unlock_bh(); |
1da177e4 | 635 | |
fd92833a | 636 | if (likely(err == 0)) |
e041c683 | 637 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
638 | else { |
639 | kfree(ifa); | |
640 | ifa = ERR_PTR(err); | |
641 | } | |
642 | ||
643 | return ifa; | |
644 | out: | |
645 | write_unlock(&addrconf_hash_lock); | |
646 | goto out2; | |
647 | } | |
648 | ||
649 | /* This function wants to get referenced ifp and releases it before return */ | |
650 | ||
651 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
652 | { | |
653 | struct inet6_ifaddr *ifa, **ifap; | |
654 | struct inet6_dev *idev = ifp->idev; | |
655 | int hash; | |
656 | int deleted = 0, onlink = 0; | |
657 | unsigned long expires = jiffies; | |
658 | ||
659 | hash = ipv6_addr_hash(&ifp->addr); | |
660 | ||
661 | ifp->dead = 1; | |
662 | ||
663 | write_lock_bh(&addrconf_hash_lock); | |
664 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
665 | ifap = &ifa->lst_next) { | |
666 | if (ifa == ifp) { | |
667 | *ifap = ifa->lst_next; | |
668 | __in6_ifa_put(ifp); | |
669 | ifa->lst_next = NULL; | |
670 | break; | |
671 | } | |
672 | } | |
673 | write_unlock_bh(&addrconf_hash_lock); | |
674 | ||
675 | write_lock_bh(&idev->lock); | |
676 | #ifdef CONFIG_IPV6_PRIVACY | |
677 | if (ifp->flags&IFA_F_TEMPORARY) { | |
678 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
679 | ifap = &ifa->tmp_next) { | |
680 | if (ifa == ifp) { | |
681 | *ifap = ifa->tmp_next; | |
682 | if (ifp->ifpub) { | |
683 | in6_ifa_put(ifp->ifpub); | |
684 | ifp->ifpub = NULL; | |
685 | } | |
686 | __in6_ifa_put(ifp); | |
687 | ifa->tmp_next = NULL; | |
688 | break; | |
689 | } | |
690 | } | |
691 | } | |
692 | #endif | |
693 | ||
1d142804 | 694 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
695 | if (ifa == ifp) { |
696 | *ifap = ifa->if_next; | |
697 | __in6_ifa_put(ifp); | |
698 | ifa->if_next = NULL; | |
699 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
700 | break; | |
701 | deleted = 1; | |
1d142804 | 702 | continue; |
1da177e4 LT |
703 | } else if (ifp->flags & IFA_F_PERMANENT) { |
704 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
705 | ifp->prefix_len)) { | |
706 | if (ifa->flags & IFA_F_PERMANENT) { | |
707 | onlink = 1; | |
708 | if (deleted) | |
709 | break; | |
710 | } else { | |
711 | unsigned long lifetime; | |
712 | ||
713 | if (!onlink) | |
714 | onlink = -1; | |
715 | ||
716 | spin_lock(&ifa->lock); | |
717 | lifetime = min_t(unsigned long, | |
718 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
719 | if (time_before(expires, | |
720 | ifa->tstamp + lifetime * HZ)) | |
721 | expires = ifa->tstamp + lifetime * HZ; | |
722 | spin_unlock(&ifa->lock); | |
723 | } | |
724 | } | |
725 | } | |
1d142804 | 726 | ifap = &ifa->if_next; |
1da177e4 LT |
727 | } |
728 | write_unlock_bh(&idev->lock); | |
729 | ||
730 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
731 | ||
e041c683 | 732 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
733 | |
734 | addrconf_del_timer(ifp); | |
735 | ||
736 | /* | |
737 | * Purge or update corresponding prefix | |
738 | * | |
739 | * 1) we don't purge prefix here if address was not permanent. | |
740 | * prefix is managed by its own lifetime. | |
741 | * 2) if there're no addresses, delete prefix. | |
742 | * 3) if there're still other permanent address(es), | |
743 | * corresponding prefix is still permanent. | |
744 | * 4) otherwise, update prefix lifetime to the | |
745 | * longest valid lifetime among the corresponding | |
746 | * addresses on the device. | |
747 | * Note: subsequent RA will update lifetime. | |
748 | * | |
749 | * --yoshfuji | |
750 | */ | |
751 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
752 | struct in6_addr prefix; | |
753 | struct rt6_info *rt; | |
c346dca1 | 754 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 755 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 756 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 LT |
757 | |
758 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
759 | if (onlink == 0) { | |
e0a1ad73 | 760 | ip6_del_rt(rt); |
1da177e4 LT |
761 | rt = NULL; |
762 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
763 | rt->rt6i_expires = expires; | |
764 | rt->rt6i_flags |= RTF_EXPIRES; | |
765 | } | |
766 | } | |
767 | dst_release(&rt->u.dst); | |
768 | } | |
769 | ||
770 | in6_ifa_put(ifp); | |
771 | } | |
772 | ||
773 | #ifdef CONFIG_IPV6_PRIVACY | |
774 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
775 | { | |
776 | struct inet6_dev *idev = ifp->idev; | |
777 | struct in6_addr addr, *tmpaddr; | |
778 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 779 | unsigned long regen_advance; |
1da177e4 LT |
780 | int tmp_plen; |
781 | int ret = 0; | |
782 | int max_addresses; | |
95c385b4 | 783 | u32 addr_flags; |
1da177e4 LT |
784 | |
785 | write_lock(&idev->lock); | |
786 | if (ift) { | |
787 | spin_lock_bh(&ift->lock); | |
788 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
789 | spin_unlock_bh(&ift->lock); | |
790 | tmpaddr = &addr; | |
791 | } else { | |
792 | tmpaddr = NULL; | |
793 | } | |
794 | retry: | |
795 | in6_dev_hold(idev); | |
796 | if (idev->cnf.use_tempaddr <= 0) { | |
797 | write_unlock(&idev->lock); | |
798 | printk(KERN_INFO | |
799 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
800 | in6_dev_put(idev); | |
801 | ret = -1; | |
802 | goto out; | |
803 | } | |
804 | spin_lock_bh(&ifp->lock); | |
805 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
806 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
807 | spin_unlock_bh(&ifp->lock); | |
808 | write_unlock(&idev->lock); | |
809 | printk(KERN_WARNING | |
810 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
811 | in6_dev_put(idev); | |
812 | ret = -1; | |
813 | goto out; | |
814 | } | |
815 | in6_ifa_hold(ifp); | |
816 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
817 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
818 | spin_unlock_bh(&ifp->lock); | |
819 | write_unlock(&idev->lock); | |
820 | printk(KERN_WARNING | |
821 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
822 | in6_ifa_put(ifp); | |
823 | in6_dev_put(idev); | |
824 | ret = -1; | |
825 | goto out; | |
826 | } | |
827 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
828 | tmp_valid_lft = min_t(__u32, | |
829 | ifp->valid_lft, | |
830 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
831 | tmp_prefered_lft = min_t(__u32, |
832 | ifp->prefered_lft, | |
1da177e4 LT |
833 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
834 | tmp_plen = ifp->prefix_len; | |
835 | max_addresses = idev->cnf.max_addresses; | |
836 | tmp_cstamp = ifp->cstamp; | |
837 | tmp_tstamp = ifp->tstamp; | |
838 | spin_unlock_bh(&ifp->lock); | |
839 | ||
eac55bf9 BB |
840 | regen_advance = idev->cnf.regen_max_retry * |
841 | idev->cnf.dad_transmits * | |
842 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 843 | write_unlock(&idev->lock); |
95c385b4 | 844 | |
eac55bf9 BB |
845 | /* A temporary address is created only if this calculated Preferred |
846 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
847 | * an implementation must not create a temporary address with a zero | |
848 | * Preferred Lifetime. | |
849 | */ | |
850 | if (tmp_prefered_lft <= regen_advance) { | |
851 | in6_ifa_put(ifp); | |
852 | in6_dev_put(idev); | |
853 | ret = -1; | |
854 | goto out; | |
855 | } | |
856 | ||
95c385b4 NH |
857 | addr_flags = IFA_F_TEMPORARY; |
858 | /* set in addrconf_prefix_rcv() */ | |
859 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
860 | addr_flags |= IFA_F_OPTIMISTIC; | |
861 | ||
1da177e4 | 862 | ift = !max_addresses || |
1ab1457c | 863 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 864 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
865 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
866 | addr_flags) : NULL; | |
1da177e4 LT |
867 | if (!ift || IS_ERR(ift)) { |
868 | in6_ifa_put(ifp); | |
869 | in6_dev_put(idev); | |
870 | printk(KERN_INFO | |
871 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
872 | tmpaddr = &addr; | |
873 | write_lock(&idev->lock); | |
874 | goto retry; | |
875 | } | |
876 | ||
877 | spin_lock_bh(&ift->lock); | |
878 | ift->ifpub = ifp; | |
879 | ift->valid_lft = tmp_valid_lft; | |
880 | ift->prefered_lft = tmp_prefered_lft; | |
881 | ift->cstamp = tmp_cstamp; | |
882 | ift->tstamp = tmp_tstamp; | |
883 | spin_unlock_bh(&ift->lock); | |
884 | ||
885 | addrconf_dad_start(ift, 0); | |
886 | in6_ifa_put(ift); | |
887 | in6_dev_put(idev); | |
888 | out: | |
889 | return ret; | |
890 | } | |
891 | #endif | |
892 | ||
893 | /* | |
072047e4 | 894 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 895 | */ |
a9b05723 YH |
896 | enum { |
897 | IPV6_SADDR_RULE_INIT = 0, | |
898 | IPV6_SADDR_RULE_LOCAL, | |
899 | IPV6_SADDR_RULE_SCOPE, | |
900 | IPV6_SADDR_RULE_PREFERRED, | |
901 | #ifdef CONFIG_IPV6_MIP6 | |
902 | IPV6_SADDR_RULE_HOA, | |
903 | #endif | |
904 | IPV6_SADDR_RULE_OIF, | |
905 | IPV6_SADDR_RULE_LABEL, | |
906 | #ifdef CONFIG_IPV6_PRIVACY | |
907 | IPV6_SADDR_RULE_PRIVACY, | |
908 | #endif | |
909 | IPV6_SADDR_RULE_ORCHID, | |
910 | IPV6_SADDR_RULE_PREFIX, | |
911 | IPV6_SADDR_RULE_MAX | |
912 | }; | |
913 | ||
072047e4 | 914 | struct ipv6_saddr_score { |
a9b05723 YH |
915 | int rule; |
916 | int addr_type; | |
917 | struct inet6_ifaddr *ifa; | |
918 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
919 | int scopedist; | |
920 | int matchlen; | |
072047e4 YH |
921 | }; |
922 | ||
a9b05723 YH |
923 | struct ipv6_saddr_dst { |
924 | struct in6_addr *addr; | |
925 | int ifindex; | |
926 | int scope; | |
927 | int label; | |
7cbca67c | 928 | unsigned int prefs; |
a9b05723 | 929 | }; |
072047e4 | 930 | |
b6f99a21 | 931 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 932 | { |
072047e4 YH |
933 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
934 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
935 | return 1; | |
936 | return 0; | |
1da177e4 LT |
937 | } |
938 | ||
a9b05723 YH |
939 | static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score, |
940 | struct ipv6_saddr_dst *dst, | |
941 | int i) | |
942 | { | |
943 | int ret; | |
944 | ||
945 | if (i <= score->rule) { | |
946 | switch (i) { | |
947 | case IPV6_SADDR_RULE_SCOPE: | |
948 | ret = score->scopedist; | |
949 | break; | |
950 | case IPV6_SADDR_RULE_PREFIX: | |
951 | ret = score->matchlen; | |
952 | break; | |
953 | default: | |
954 | ret = !!test_bit(i, score->scorebits); | |
955 | } | |
956 | goto out; | |
957 | } | |
958 | ||
959 | switch (i) { | |
960 | case IPV6_SADDR_RULE_INIT: | |
961 | /* Rule 0: remember if hiscore is not ready yet */ | |
962 | ret = !!score->ifa; | |
963 | break; | |
964 | case IPV6_SADDR_RULE_LOCAL: | |
965 | /* Rule 1: Prefer same address */ | |
966 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
967 | break; | |
968 | case IPV6_SADDR_RULE_SCOPE: | |
969 | /* Rule 2: Prefer appropriate scope | |
970 | * | |
971 | * ret | |
972 | * ^ | |
973 | * -1 | d 15 | |
974 | * ---+--+-+---> scope | |
975 | * | | |
976 | * | d is scope of the destination. | |
977 | * B-d | \ | |
978 | * | \ <- smaller scope is better if | |
979 | * B-15 | \ if scope is enough for destinaion. | |
980 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
981 | * d-C-1 | / | |
982 | * |/ <- greater is better | |
983 | * -C / if scope is not enough for destination. | |
984 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
985 | * | |
986 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
987 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
988 | * Assume B = 0 and we get C > 29. | |
989 | */ | |
990 | ret = __ipv6_addr_src_scope(score->addr_type); | |
991 | if (ret >= dst->scope) | |
992 | ret = -ret; | |
993 | else | |
994 | ret -= 128; /* 30 is enough */ | |
995 | score->scopedist = ret; | |
996 | break; | |
997 | case IPV6_SADDR_RULE_PREFERRED: | |
998 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
999 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1000 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1001 | break; | |
1002 | #ifdef CONFIG_IPV6_MIP6 | |
1003 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1004 | { |
a9b05723 | 1005 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1006 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1007 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1008 | break; |
7cbca67c | 1009 | } |
a9b05723 YH |
1010 | #endif |
1011 | case IPV6_SADDR_RULE_OIF: | |
1012 | /* Rule 5: Prefer outgoing interface */ | |
1013 | ret = (!dst->ifindex || | |
1014 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1015 | break; | |
1016 | case IPV6_SADDR_RULE_LABEL: | |
1017 | /* Rule 6: Prefer matching label */ | |
1018 | ret = ipv6_addr_label(&score->ifa->addr, score->addr_type, | |
1019 | score->ifa->idev->dev->ifindex) == dst->label; | |
1020 | break; | |
1021 | #ifdef CONFIG_IPV6_PRIVACY | |
1022 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1023 | { |
a9b05723 YH |
1024 | /* Rule 7: Prefer public address |
1025 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1026 | */ | |
7cbca67c YH |
1027 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1028 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1029 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1030 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1031 | break; |
7cbca67c | 1032 | } |
a9b05723 YH |
1033 | #endif |
1034 | case IPV6_SADDR_RULE_ORCHID: | |
1035 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1036 | * non-ORCHID vs non-ORCHID | |
1037 | */ | |
1038 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1039 | ipv6_addr_orchid(dst->addr)); | |
1040 | break; | |
1041 | case IPV6_SADDR_RULE_PREFIX: | |
1042 | /* Rule 8: Use longest matching prefix */ | |
1043 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1044 | dst->addr); | |
1045 | break; | |
1046 | default: | |
1047 | ret = 0; | |
1048 | } | |
1049 | ||
1050 | if (ret) | |
1051 | __set_bit(i, score->scorebits); | |
1052 | score->rule = i; | |
1053 | out: | |
1054 | return ret; | |
1055 | } | |
1056 | ||
1057 | int ipv6_dev_get_saddr(struct net_device *dst_dev, | |
7cbca67c YH |
1058 | struct in6_addr *daddr, unsigned int prefs, |
1059 | struct in6_addr *saddr) | |
1da177e4 | 1060 | { |
a9b05723 YH |
1061 | struct ipv6_saddr_score scores[2], |
1062 | *score = &scores[0], *hiscore = &scores[1]; | |
c346dca1 | 1063 | struct net *net = dev_net(dst_dev); |
a9b05723 | 1064 | struct ipv6_saddr_dst dst; |
072047e4 | 1065 | struct net_device *dev; |
a9b05723 | 1066 | int dst_type; |
1da177e4 | 1067 | |
a9b05723 YH |
1068 | dst_type = __ipv6_addr_type(daddr); |
1069 | dst.addr = daddr; | |
1070 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1071 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
1072 | dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex); | |
7cbca67c | 1073 | dst.prefs = prefs; |
a9b05723 YH |
1074 | |
1075 | hiscore->rule = -1; | |
1076 | hiscore->ifa = NULL; | |
1da177e4 | 1077 | |
072047e4 | 1078 | read_lock(&dev_base_lock); |
8814c4b5 | 1079 | rcu_read_lock(); |
1da177e4 | 1080 | |
6fda7350 | 1081 | for_each_netdev(net, dev) { |
072047e4 | 1082 | struct inet6_dev *idev; |
072047e4 | 1083 | |
a9b05723 | 1084 | /* Candidate Source Address (section 4) |
072047e4 YH |
1085 | * - multicast and link-local destination address, |
1086 | * the set of candidate source address MUST only | |
1087 | * include addresses assigned to interfaces | |
1088 | * belonging to the same link as the outgoing | |
1089 | * interface. | |
1090 | * (- For site-local destination addresses, the | |
1091 | * set of candidate source addresses MUST only | |
1092 | * include addresses assigned to interfaces | |
1093 | * belonging to the same site as the outgoing | |
1094 | * interface.) | |
1095 | */ | |
a9b05723 YH |
1096 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1097 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1098 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1099 | continue; |
1da177e4 | 1100 | |
1da177e4 | 1101 | idev = __in6_dev_get(dev); |
072047e4 YH |
1102 | if (!idev) |
1103 | continue; | |
1104 | ||
1105 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1106 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1107 | int i; | |
072047e4 | 1108 | |
a9b05723 | 1109 | /* |
6b3ae80a YH |
1110 | * - Tentative Address (RFC2462 section 5.4) |
1111 | * - A tentative address is not considered | |
1112 | * "assigned to an interface" in the traditional | |
95c385b4 | 1113 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1114 | * - Candidate Source Address (section 4) |
072047e4 YH |
1115 | * - In any case, anycast addresses, multicast |
1116 | * addresses, and the unspecified address MUST | |
1117 | * NOT be included in a candidate set. | |
1118 | */ | |
a9b05723 YH |
1119 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1120 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1121 | continue; |
a9b05723 YH |
1122 | |
1123 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1124 | ||
1125 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1126 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1127 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1128 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1129 | "assigned as unicast address on %s", |
1130 | dev->name); | |
1131 | continue; | |
1132 | } | |
1133 | ||
a9b05723 YH |
1134 | score->rule = -1; |
1135 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1136 | ||
1137 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1138 | int minihiscore, miniscore; | |
1139 | ||
1140 | minihiscore = ipv6_get_saddr_eval(hiscore, &dst, i); | |
1141 | miniscore = ipv6_get_saddr_eval(score, &dst, i); | |
1142 | ||
1143 | if (minihiscore > miniscore) { | |
1144 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1145 | score->scopedist > 0) { | |
1146 | /* | |
1147 | * special case: | |
1148 | * each remaining entry | |
1149 | * has too small (not enough) | |
1150 | * scope, because ifa entries | |
1151 | * are sorted by their scope | |
1152 | * values. | |
1153 | */ | |
1154 | goto try_nextdev; | |
1155 | } | |
1156 | break; | |
1157 | } else if (minihiscore < miniscore) { | |
1158 | struct ipv6_saddr_score *tmp; | |
1159 | ||
1160 | if (hiscore->ifa) | |
1161 | in6_ifa_put(hiscore->ifa); | |
1162 | ||
1163 | in6_ifa_hold(score->ifa); | |
1164 | ||
1165 | tmp = hiscore; | |
1166 | hiscore = score; | |
1167 | score = tmp; | |
1168 | ||
1169 | /* restore our iterator */ | |
1170 | score->ifa = hiscore->ifa; | |
1171 | ||
1172 | break; | |
1da177e4 | 1173 | } |
072047e4 | 1174 | } |
1da177e4 | 1175 | } |
a9b05723 | 1176 | try_nextdev: |
072047e4 | 1177 | read_unlock_bh(&idev->lock); |
1da177e4 | 1178 | } |
8814c4b5 | 1179 | rcu_read_unlock(); |
1da177e4 LT |
1180 | read_unlock(&dev_base_lock); |
1181 | ||
a9b05723 | 1182 | if (!hiscore->ifa) |
072047e4 | 1183 | return -EADDRNOTAVAIL; |
1ab1457c | 1184 | |
a9b05723 YH |
1185 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1186 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1187 | return 0; |
1da177e4 LT |
1188 | } |
1189 | ||
5e5f3f0f | 1190 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1191 | |
95c385b4 NH |
1192 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1193 | unsigned char banned_flags) | |
1da177e4 LT |
1194 | { |
1195 | struct inet6_dev *idev; | |
1196 | int err = -EADDRNOTAVAIL; | |
1197 | ||
8814c4b5 | 1198 | rcu_read_lock(); |
1da177e4 LT |
1199 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1200 | struct inet6_ifaddr *ifp; | |
1201 | ||
1202 | read_lock_bh(&idev->lock); | |
1203 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1204 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1205 | ipv6_addr_copy(addr, &ifp->addr); |
1206 | err = 0; | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | read_unlock_bh(&idev->lock); | |
1211 | } | |
8814c4b5 | 1212 | rcu_read_unlock(); |
1da177e4 LT |
1213 | return err; |
1214 | } | |
1215 | ||
1216 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1217 | { | |
1218 | int cnt = 0; | |
1219 | struct inet6_ifaddr *ifp; | |
1220 | ||
1221 | read_lock_bh(&idev->lock); | |
1222 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1223 | cnt++; | |
1224 | read_unlock_bh(&idev->lock); | |
1225 | return cnt; | |
1226 | } | |
1227 | ||
bfeade08 DL |
1228 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1229 | struct net_device *dev, int strict) | |
1da177e4 LT |
1230 | { |
1231 | struct inet6_ifaddr * ifp; | |
1232 | u8 hash = ipv6_addr_hash(addr); | |
1233 | ||
1234 | read_lock_bh(&addrconf_hash_lock); | |
1235 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1236 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1237 | continue; |
1da177e4 LT |
1238 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1239 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1240 | if (dev == NULL || ifp->idev->dev == dev || | |
1241 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1242 | break; | |
1243 | } | |
1244 | } | |
1245 | read_unlock_bh(&addrconf_hash_lock); | |
1246 | return ifp != NULL; | |
1247 | } | |
7159039a YH |
1248 | EXPORT_SYMBOL(ipv6_chk_addr); |
1249 | ||
1da177e4 | 1250 | static |
06bfe655 DL |
1251 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1252 | struct net_device *dev) | |
1da177e4 LT |
1253 | { |
1254 | struct inet6_ifaddr * ifp; | |
1255 | u8 hash = ipv6_addr_hash(addr); | |
1256 | ||
1257 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1258 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1259 | continue; |
1da177e4 LT |
1260 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1261 | if (dev == NULL || ifp->idev->dev == dev) | |
1262 | break; | |
1263 | } | |
1264 | } | |
1265 | return ifp != NULL; | |
1266 | } | |
1267 | ||
1cab3da6 DL |
1268 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr, |
1269 | struct net_device *dev, int strict) | |
1da177e4 LT |
1270 | { |
1271 | struct inet6_ifaddr * ifp; | |
1272 | u8 hash = ipv6_addr_hash(addr); | |
1273 | ||
1274 | read_lock_bh(&addrconf_hash_lock); | |
1275 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1276 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1277 | continue; |
1da177e4 LT |
1278 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1279 | if (dev == NULL || ifp->idev->dev == dev || | |
1280 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1281 | in6_ifa_hold(ifp); | |
1282 | break; | |
1283 | } | |
1284 | } | |
1285 | } | |
1286 | read_unlock_bh(&addrconf_hash_lock); | |
1287 | ||
1288 | return ifp; | |
1289 | } | |
1290 | ||
1291 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1292 | { | |
1293 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1294 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1295 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1296 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1297 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1298 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1299 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1300 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1301 | ||
1302 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1303 | return 1; | |
1304 | ||
1305 | if (addr_type2 == IPV6_ADDR_ANY && | |
1306 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1307 | return 1; | |
1308 | ||
1309 | if (addr_type == IPV6_ADDR_ANY && | |
1310 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1311 | return 1; | |
1312 | ||
1313 | if (sk2_rcv_saddr6 && | |
1314 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1315 | return 1; | |
1316 | ||
1317 | if (addr_type == IPV6_ADDR_MAPPED && | |
1318 | !sk2_ipv6only && | |
1319 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1320 | return 1; | |
1321 | ||
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | /* Gets referenced address, destroys ifaddr */ | |
1326 | ||
9f5336e2 | 1327 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1328 | { |
1da177e4 LT |
1329 | if (ifp->flags&IFA_F_PERMANENT) { |
1330 | spin_lock_bh(&ifp->lock); | |
1331 | addrconf_del_timer(ifp); | |
1332 | ifp->flags |= IFA_F_TENTATIVE; | |
1333 | spin_unlock_bh(&ifp->lock); | |
1334 | in6_ifa_put(ifp); | |
1335 | #ifdef CONFIG_IPV6_PRIVACY | |
1336 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1337 | struct inet6_ifaddr *ifpub; | |
1338 | spin_lock_bh(&ifp->lock); | |
1339 | ifpub = ifp->ifpub; | |
1340 | if (ifpub) { | |
1341 | in6_ifa_hold(ifpub); | |
1342 | spin_unlock_bh(&ifp->lock); | |
1343 | ipv6_create_tempaddr(ifpub, ifp); | |
1344 | in6_ifa_put(ifpub); | |
1345 | } else { | |
1346 | spin_unlock_bh(&ifp->lock); | |
1347 | } | |
1348 | ipv6_del_addr(ifp); | |
1349 | #endif | |
1350 | } else | |
1351 | ipv6_del_addr(ifp); | |
1352 | } | |
1353 | ||
3c21edbd YH |
1354 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1355 | { | |
1356 | if (net_ratelimit()) | |
1357 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1358 | addrconf_dad_stop(ifp); | |
1359 | } | |
1da177e4 LT |
1360 | |
1361 | /* Join to solicited addr multicast group. */ | |
1362 | ||
1363 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1364 | { | |
1365 | struct in6_addr maddr; | |
1366 | ||
1367 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1368 | return; | |
1369 | ||
1370 | addrconf_addr_solict_mult(addr, &maddr); | |
1371 | ipv6_dev_mc_inc(dev, &maddr); | |
1372 | } | |
1373 | ||
1374 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1375 | { | |
1376 | struct in6_addr maddr; | |
1377 | ||
1378 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1379 | return; | |
1380 | ||
1381 | addrconf_addr_solict_mult(addr, &maddr); | |
1382 | __ipv6_dev_mc_dec(idev, &maddr); | |
1383 | } | |
1384 | ||
20380731 | 1385 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1386 | { |
1387 | struct in6_addr addr; | |
1388 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1389 | if (ipv6_addr_any(&addr)) | |
1390 | return; | |
1391 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1392 | } | |
1393 | ||
20380731 | 1394 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1395 | { |
1396 | struct in6_addr addr; | |
1397 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1398 | if (ipv6_addr_any(&addr)) | |
1399 | return; | |
1400 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1401 | } | |
1402 | ||
073a8e0e YH |
1403 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1404 | { | |
1405 | if (dev->addr_len != ETH_ALEN) | |
1406 | return -1; | |
1407 | memcpy(eui, dev->dev_addr, 3); | |
1408 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1409 | ||
1410 | /* | |
1411 | * The zSeries OSA network cards can be shared among various | |
1412 | * OS instances, but the OSA cards have only one MAC address. | |
1413 | * This leads to duplicate address conflicts in conjunction | |
1414 | * with IPv6 if more than one instance uses the same card. | |
1415 | * | |
1416 | * The driver for these cards can deliver a unique 16-bit | |
1417 | * identifier for each instance sharing the same card. It is | |
1418 | * placed instead of 0xFFFE in the interface identifier. The | |
1419 | * "u" bit of the interface identifier is not inverted in this | |
1420 | * case. Hence the resulting interface identifier has local | |
1421 | * scope according to RFC2373. | |
1422 | */ | |
1423 | if (dev->dev_id) { | |
1424 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1425 | eui[4] = dev->dev_id & 0xFF; | |
1426 | } else { | |
1427 | eui[3] = 0xFF; | |
1428 | eui[4] = 0xFE; | |
1429 | eui[0] ^= 2; | |
1430 | } | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1435 | { | |
1436 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1437 | if (dev->addr_len != ARCNET_ALEN) | |
1438 | return -1; | |
1439 | memset(eui, 0, 7); | |
1440 | eui[7] = *(u8*)dev->dev_addr; | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1445 | { | |
1446 | if (dev->addr_len != INFINIBAND_ALEN) | |
1447 | return -1; | |
1448 | memcpy(eui, dev->dev_addr + 12, 8); | |
1449 | eui[0] |= 2; | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1da177e4 LT |
1453 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1454 | { | |
1455 | switch (dev->type) { | |
1456 | case ARPHRD_ETHER: | |
1457 | case ARPHRD_FDDI: | |
1458 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1459 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1460 | case ARPHRD_ARCNET: |
073a8e0e | 1461 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1462 | case ARPHRD_INFINIBAND: |
073a8e0e | 1463 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 FT |
1464 | case ARPHRD_SIT: |
1465 | if (dev->priv_flags & IFF_ISATAP) | |
1466 | return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr); | |
1da177e4 LT |
1467 | } |
1468 | return -1; | |
1469 | } | |
1470 | ||
1471 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1472 | { | |
1473 | int err = -1; | |
1474 | struct inet6_ifaddr *ifp; | |
1475 | ||
1476 | read_lock_bh(&idev->lock); | |
1477 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1478 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1479 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1480 | err = 0; | |
1481 | break; | |
1482 | } | |
1483 | } | |
1484 | read_unlock_bh(&idev->lock); | |
1485 | return err; | |
1486 | } | |
1487 | ||
1488 | #ifdef CONFIG_IPV6_PRIVACY | |
1489 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1490 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1491 | { | |
1da177e4 | 1492 | regen: |
955189ef | 1493 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1494 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1495 | |
1496 | /* | |
1497 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1498 | * check if generated address is not inappropriate | |
1499 | * | |
1500 | * - Reserved subnet anycast (RFC 2526) | |
1501 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1502 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1503 | * 00-00-5E-FE-xx-xx-xx-xx |
1504 | * - value 0 | |
1505 | * - XXX: already assigned to an address on the device | |
1506 | */ | |
1ab1457c | 1507 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1508 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1509 | (idev->rndid[7]&0x80)) | |
1510 | goto regen; | |
1511 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1512 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1513 | goto regen; | |
1514 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1515 | goto regen; | |
1516 | } | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static void ipv6_regen_rndid(unsigned long data) | |
1522 | { | |
1523 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1524 | unsigned long expires; | |
1525 | ||
8814c4b5 | 1526 | rcu_read_lock_bh(); |
1da177e4 LT |
1527 | write_lock_bh(&idev->lock); |
1528 | ||
1529 | if (idev->dead) | |
1530 | goto out; | |
1531 | ||
1532 | if (__ipv6_regen_rndid(idev) < 0) | |
1533 | goto out; | |
1ab1457c | 1534 | |
1da177e4 | 1535 | expires = jiffies + |
1ab1457c | 1536 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1537 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1538 | if (time_before(expires, jiffies)) { | |
1539 | printk(KERN_WARNING | |
1540 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1541 | idev->dev->name); | |
1542 | goto out; | |
1543 | } | |
1544 | ||
1545 | if (!mod_timer(&idev->regen_timer, expires)) | |
1546 | in6_dev_hold(idev); | |
1547 | ||
1548 | out: | |
1549 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1550 | rcu_read_unlock_bh(); |
1da177e4 LT |
1551 | in6_dev_put(idev); |
1552 | } | |
1553 | ||
1554 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1555 | int ret = 0; | |
1556 | ||
1557 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1558 | ret = __ipv6_regen_rndid(idev); | |
1559 | return ret; | |
1560 | } | |
1561 | #endif | |
1562 | ||
1563 | /* | |
1564 | * Add prefix route. | |
1565 | */ | |
1566 | ||
1567 | static void | |
1568 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1569 | unsigned long expires, u32 flags) |
1da177e4 | 1570 | { |
86872cb5 TG |
1571 | struct fib6_config cfg = { |
1572 | .fc_table = RT6_TABLE_PREFIX, | |
1573 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1574 | .fc_ifindex = dev->ifindex, | |
1575 | .fc_expires = expires, | |
1576 | .fc_dst_len = plen, | |
1577 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1578 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1579 | }; |
1da177e4 | 1580 | |
86872cb5 | 1581 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1582 | |
1583 | /* Prevent useless cloning on PtP SIT. | |
1584 | This thing is done here expecting that the whole | |
1585 | class of non-broadcast devices need not cloning. | |
1586 | */ | |
0be669bb | 1587 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1588 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1589 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1590 | #endif |
1da177e4 | 1591 | |
86872cb5 | 1592 | ip6_route_add(&cfg); |
1da177e4 LT |
1593 | } |
1594 | ||
1595 | /* Create "default" multicast route to the interface */ | |
1596 | ||
1597 | static void addrconf_add_mroute(struct net_device *dev) | |
1598 | { | |
86872cb5 TG |
1599 | struct fib6_config cfg = { |
1600 | .fc_table = RT6_TABLE_LOCAL, | |
1601 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1602 | .fc_ifindex = dev->ifindex, | |
1603 | .fc_dst_len = 8, | |
1604 | .fc_flags = RTF_UP, | |
c346dca1 | 1605 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1606 | }; |
1607 | ||
1608 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1609 | ||
1610 | ip6_route_add(&cfg); | |
1da177e4 LT |
1611 | } |
1612 | ||
0be669bb | 1613 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1614 | static void sit_route_add(struct net_device *dev) |
1615 | { | |
86872cb5 TG |
1616 | struct fib6_config cfg = { |
1617 | .fc_table = RT6_TABLE_MAIN, | |
1618 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1619 | .fc_ifindex = dev->ifindex, | |
1620 | .fc_dst_len = 96, | |
1621 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1622 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1623 | }; |
1da177e4 LT |
1624 | |
1625 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1626 | ip6_route_add(&cfg); |
1da177e4 | 1627 | } |
0be669bb | 1628 | #endif |
1da177e4 LT |
1629 | |
1630 | static void addrconf_add_lroute(struct net_device *dev) | |
1631 | { | |
1632 | struct in6_addr addr; | |
1633 | ||
1634 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1635 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1636 | } | |
1637 | ||
1638 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1639 | { | |
1640 | struct inet6_dev *idev; | |
1641 | ||
1642 | ASSERT_RTNL(); | |
1643 | ||
1644 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1645 | return NULL; | |
1646 | ||
1647 | /* Add default multicast route */ | |
1648 | addrconf_add_mroute(dev); | |
1649 | ||
1650 | /* Add link local route */ | |
1651 | addrconf_add_lroute(dev); | |
1652 | return idev; | |
1653 | } | |
1654 | ||
1655 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1656 | { | |
1657 | struct prefix_info *pinfo; | |
1658 | __u32 valid_lft; | |
1659 | __u32 prefered_lft; | |
1660 | int addr_type; | |
1661 | unsigned long rt_expires; | |
1662 | struct inet6_dev *in6_dev; | |
1663 | ||
1664 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1665 | |
1da177e4 LT |
1666 | if (len < sizeof(struct prefix_info)) { |
1667 | ADBG(("addrconf: prefix option too short\n")); | |
1668 | return; | |
1669 | } | |
1ab1457c | 1670 | |
1da177e4 LT |
1671 | /* |
1672 | * Validation checks ([ADDRCONF], page 19) | |
1673 | */ | |
1674 | ||
1675 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1676 | ||
1677 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1678 | return; | |
1679 | ||
1680 | valid_lft = ntohl(pinfo->valid); | |
1681 | prefered_lft = ntohl(pinfo->prefered); | |
1682 | ||
1683 | if (prefered_lft > valid_lft) { | |
1684 | if (net_ratelimit()) | |
1685 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1686 | return; | |
1687 | } | |
1688 | ||
1689 | in6_dev = in6_dev_get(dev); | |
1690 | ||
1691 | if (in6_dev == NULL) { | |
1692 | if (net_ratelimit()) | |
1693 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1694 | return; | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Two things going on here: | |
1699 | * 1) Add routes for on-link prefixes | |
1700 | * 2) Configure prefixes with the auto flag set | |
1701 | */ | |
1702 | ||
1703 | /* Avoid arithmetic overflow. Really, we could | |
1704 | save rt_expires in seconds, likely valid_lft, | |
1705 | but it would require division in fib gc, that it | |
1706 | not good. | |
1707 | */ | |
1708 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1709 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1710 | else |
3dd4bc68 YH |
1711 | rt_expires = valid_lft * HZ; |
1712 | ||
1713 | /* | |
1714 | * We convert this (in jiffies) to clock_t later. | |
1715 | * Avoid arithmetic overflow there as well. | |
1716 | * Overflow can happen only if HZ < USER_HZ. | |
1717 | */ | |
1718 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1719 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1720 | |
1721 | if (pinfo->onlink) { | |
1722 | struct rt6_info *rt; | |
c346dca1 | 1723 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
6fda7350 | 1724 | dev->ifindex, 1); |
1da177e4 LT |
1725 | |
1726 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1727 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1728 | if (valid_lft == 0) { | |
e0a1ad73 | 1729 | ip6_del_rt(rt); |
1da177e4 LT |
1730 | rt = NULL; |
1731 | } else { | |
3dd4bc68 | 1732 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1733 | } |
1734 | } | |
1735 | } else if (valid_lft) { | |
1736 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1737 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1738 | } |
1739 | if (rt) | |
1740 | dst_release(&rt->u.dst); | |
1741 | } | |
1742 | ||
1743 | /* Try to figure out our local address for this prefix */ | |
1744 | ||
1745 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1746 | struct inet6_ifaddr * ifp; | |
1747 | struct in6_addr addr; | |
1748 | int create = 0, update_lft = 0; | |
1749 | ||
1750 | if (pinfo->prefix_len == 64) { | |
1751 | memcpy(&addr, &pinfo->prefix, 8); | |
1752 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1753 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1754 | in6_dev_put(in6_dev); | |
1755 | return; | |
1756 | } | |
1757 | goto ok; | |
1758 | } | |
1759 | if (net_ratelimit()) | |
1760 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1761 | pinfo->prefix_len); | |
1762 | in6_dev_put(in6_dev); | |
1763 | return; | |
1764 | ||
1765 | ok: | |
1766 | ||
c346dca1 | 1767 | ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1); |
1da177e4 LT |
1768 | |
1769 | if (ifp == NULL && valid_lft) { | |
1770 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1771 | u32 addr_flags = 0; |
1772 | ||
1773 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1774 | if (in6_dev->cnf.optimistic_dad && | |
1775 | !ipv6_devconf.forwarding) | |
1776 | addr_flags = IFA_F_OPTIMISTIC; | |
1777 | #endif | |
1da177e4 LT |
1778 | |
1779 | /* Do not allow to create too much of autoconfigured | |
1780 | * addresses; this would be too easy way to crash kernel. | |
1781 | */ | |
1782 | if (!max_addresses || | |
1783 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1784 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1785 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1786 | addr_flags); | |
1da177e4 LT |
1787 | |
1788 | if (!ifp || IS_ERR(ifp)) { | |
1789 | in6_dev_put(in6_dev); | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | update_lft = create = 1; | |
1794 | ifp->cstamp = jiffies; | |
1795 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1796 | } | |
1797 | ||
1798 | if (ifp) { | |
1799 | int flags; | |
1800 | unsigned long now; | |
1801 | #ifdef CONFIG_IPV6_PRIVACY | |
1802 | struct inet6_ifaddr *ift; | |
1803 | #endif | |
1804 | u32 stored_lft; | |
1805 | ||
1806 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1807 | spin_lock(&ifp->lock); | |
1808 | now = jiffies; | |
1809 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1810 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1811 | else | |
1812 | stored_lft = 0; | |
1813 | if (!update_lft && stored_lft) { | |
1814 | if (valid_lft > MIN_VALID_LIFETIME || | |
1815 | valid_lft > stored_lft) | |
1816 | update_lft = 1; | |
1817 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1818 | /* valid_lft <= stored_lft is always true */ | |
1819 | /* XXX: IPsec */ | |
1820 | update_lft = 0; | |
1821 | } else { | |
1822 | valid_lft = MIN_VALID_LIFETIME; | |
1823 | if (valid_lft < prefered_lft) | |
1824 | prefered_lft = valid_lft; | |
1825 | update_lft = 1; | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | if (update_lft) { | |
1830 | ifp->valid_lft = valid_lft; | |
1831 | ifp->prefered_lft = prefered_lft; | |
1832 | ifp->tstamp = now; | |
1833 | flags = ifp->flags; | |
1834 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1835 | spin_unlock(&ifp->lock); | |
1836 | ||
1837 | if (!(flags&IFA_F_TENTATIVE)) | |
1838 | ipv6_ifa_notify(0, ifp); | |
1839 | } else | |
1840 | spin_unlock(&ifp->lock); | |
1841 | ||
1842 | #ifdef CONFIG_IPV6_PRIVACY | |
1843 | read_lock_bh(&in6_dev->lock); | |
1844 | /* update all temporary addresses in the list */ | |
1845 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1846 | /* | |
1847 | * When adjusting the lifetimes of an existing | |
1848 | * temporary address, only lower the lifetimes. | |
1849 | * Implementations must not increase the | |
1850 | * lifetimes of an existing temporary address | |
1851 | * when processing a Prefix Information Option. | |
1852 | */ | |
c6fbfac2 BB |
1853 | if (ifp != ift->ifpub) |
1854 | continue; | |
1855 | ||
1da177e4 LT |
1856 | spin_lock(&ift->lock); |
1857 | flags = ift->flags; | |
1858 | if (ift->valid_lft > valid_lft && | |
1859 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1860 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1861 | if (ift->prefered_lft > prefered_lft && | |
1862 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1863 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1864 | spin_unlock(&ift->lock); | |
1865 | if (!(flags&IFA_F_TENTATIVE)) | |
1866 | ipv6_ifa_notify(0, ift); | |
1867 | } | |
1868 | ||
1869 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1870 | /* | |
1871 | * When a new public address is created as described in [ADDRCONF], | |
1872 | * also create a new temporary address. | |
1873 | */ | |
1ab1457c | 1874 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1875 | ipv6_create_tempaddr(ifp, NULL); |
1876 | } else { | |
1877 | read_unlock_bh(&in6_dev->lock); | |
1878 | } | |
1879 | #endif | |
1880 | in6_ifa_put(ifp); | |
1881 | addrconf_verify(0); | |
1882 | } | |
1883 | } | |
1884 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1885 | in6_dev_put(in6_dev); | |
1886 | } | |
1887 | ||
1888 | /* | |
1889 | * Set destination address. | |
1890 | * Special case for SIT interfaces where we create a new "virtual" | |
1891 | * device. | |
1892 | */ | |
af284937 | 1893 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
1894 | { |
1895 | struct in6_ifreq ireq; | |
1896 | struct net_device *dev; | |
1897 | int err = -EINVAL; | |
1898 | ||
1899 | rtnl_lock(); | |
1900 | ||
1901 | err = -EFAULT; | |
1902 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1903 | goto err_exit; | |
1904 | ||
af284937 | 1905 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
1906 | |
1907 | err = -ENODEV; | |
1908 | if (dev == NULL) | |
1909 | goto err_exit; | |
1910 | ||
0be669bb | 1911 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1912 | if (dev->type == ARPHRD_SIT) { |
1913 | struct ifreq ifr; | |
1914 | mm_segment_t oldfs; | |
1915 | struct ip_tunnel_parm p; | |
1916 | ||
1917 | err = -EADDRNOTAVAIL; | |
1918 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1919 | goto err_exit; | |
1920 | ||
1921 | memset(&p, 0, sizeof(p)); | |
1922 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1923 | p.iph.saddr = 0; | |
1924 | p.iph.version = 4; | |
1925 | p.iph.ihl = 5; | |
1926 | p.iph.protocol = IPPROTO_IPV6; | |
1927 | p.iph.ttl = 64; | |
d20b3109 | 1928 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 LT |
1929 | |
1930 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1931 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1932 | set_fs(oldfs); | |
1933 | ||
1934 | if (err == 0) { | |
1935 | err = -ENOBUFS; | |
af284937 DL |
1936 | dev = __dev_get_by_name(net, p.name); |
1937 | if (!dev) | |
1da177e4 LT |
1938 | goto err_exit; |
1939 | err = dev_open(dev); | |
1940 | } | |
1941 | } | |
0be669bb | 1942 | #endif |
1da177e4 LT |
1943 | |
1944 | err_exit: | |
1945 | rtnl_unlock(); | |
1946 | return err; | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * Manual configuration of address on an interface | |
1951 | */ | |
af284937 DL |
1952 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
1953 | int plen, __u8 ifa_flags, __u32 prefered_lft, | |
1954 | __u32 valid_lft) | |
1da177e4 LT |
1955 | { |
1956 | struct inet6_ifaddr *ifp; | |
1957 | struct inet6_dev *idev; | |
1958 | struct net_device *dev; | |
1959 | int scope; | |
46d48046 | 1960 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1961 | |
1962 | ASSERT_RTNL(); | |
1ab1457c | 1963 | |
0778769d NT |
1964 | /* check the lifetime */ |
1965 | if (!valid_lft || prefered_lft > valid_lft) | |
1966 | return -EINVAL; | |
1967 | ||
af284937 DL |
1968 | dev = __dev_get_by_index(net, ifindex); |
1969 | if (!dev) | |
1da177e4 | 1970 | return -ENODEV; |
1ab1457c | 1971 | |
1da177e4 LT |
1972 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1973 | return -ENOBUFS; | |
1974 | ||
1975 | scope = ipv6_addr_scope(pfx); | |
1976 | ||
46d48046 | 1977 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1978 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1979 | flags = 0; |
1980 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1981 | valid_lft = 0x7FFFFFFF/HZ; |
1982 | ||
1983 | if (prefered_lft == 0) | |
1984 | ifa_flags |= IFA_F_DEPRECATED; | |
1985 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1986 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1987 | prefered_lft = 0x7FFFFFFF/HZ; | |
1988 | ||
1989 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1990 | ||
1da177e4 | 1991 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1992 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1993 | ifp->valid_lft = valid_lft; |
1994 | ifp->prefered_lft = prefered_lft; | |
1995 | ifp->tstamp = jiffies; | |
06aebfb7 | 1996 | spin_unlock_bh(&ifp->lock); |
0778769d | 1997 | |
46d48046 YH |
1998 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1999 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
2000 | /* |
2001 | * Note that section 3.1 of RFC 4429 indicates | |
2002 | * that the Optimistic flag should not be set for | |
2003 | * manually configured addresses | |
2004 | */ | |
1da177e4 LT |
2005 | addrconf_dad_start(ifp, 0); |
2006 | in6_ifa_put(ifp); | |
0778769d | 2007 | addrconf_verify(0); |
1da177e4 LT |
2008 | return 0; |
2009 | } | |
2010 | ||
2011 | return PTR_ERR(ifp); | |
2012 | } | |
2013 | ||
af284937 DL |
2014 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
2015 | int plen) | |
1da177e4 LT |
2016 | { |
2017 | struct inet6_ifaddr *ifp; | |
2018 | struct inet6_dev *idev; | |
2019 | struct net_device *dev; | |
1ab1457c | 2020 | |
af284937 DL |
2021 | dev = __dev_get_by_index(net, ifindex); |
2022 | if (!dev) | |
1da177e4 LT |
2023 | return -ENODEV; |
2024 | ||
2025 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2026 | return -ENXIO; | |
2027 | ||
2028 | read_lock_bh(&idev->lock); | |
2029 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2030 | if (ifp->prefix_len == plen && | |
2031 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2032 | in6_ifa_hold(ifp); | |
2033 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2034 | |
1da177e4 LT |
2035 | ipv6_del_addr(ifp); |
2036 | ||
2037 | /* If the last address is deleted administratively, | |
2038 | disable IPv6 on this interface. | |
2039 | */ | |
2040 | if (idev->addr_list == NULL) | |
2041 | addrconf_ifdown(idev->dev, 1); | |
2042 | return 0; | |
2043 | } | |
2044 | } | |
2045 | read_unlock_bh(&idev->lock); | |
2046 | return -EADDRNOTAVAIL; | |
2047 | } | |
2048 | ||
2049 | ||
af284937 | 2050 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2051 | { |
2052 | struct in6_ifreq ireq; | |
2053 | int err; | |
1ab1457c | 2054 | |
1da177e4 LT |
2055 | if (!capable(CAP_NET_ADMIN)) |
2056 | return -EPERM; | |
1ab1457c | 2057 | |
1da177e4 LT |
2058 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2059 | return -EFAULT; | |
2060 | ||
2061 | rtnl_lock(); | |
af284937 DL |
2062 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2063 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2064 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2065 | rtnl_unlock(); |
2066 | return err; | |
2067 | } | |
2068 | ||
af284937 | 2069 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2070 | { |
2071 | struct in6_ifreq ireq; | |
2072 | int err; | |
1ab1457c | 2073 | |
1da177e4 LT |
2074 | if (!capable(CAP_NET_ADMIN)) |
2075 | return -EPERM; | |
2076 | ||
2077 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2078 | return -EFAULT; | |
2079 | ||
2080 | rtnl_lock(); | |
af284937 DL |
2081 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2082 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2083 | rtnl_unlock(); |
2084 | return err; | |
2085 | } | |
2086 | ||
0be669bb | 2087 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2088 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2089 | { | |
2090 | struct inet6_ifaddr * ifp; | |
2091 | struct in6_addr addr; | |
2092 | struct net_device *dev; | |
c346dca1 | 2093 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2094 | int scope; |
2095 | ||
2096 | ASSERT_RTNL(); | |
2097 | ||
2098 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2099 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2100 | ||
2101 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2102 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2103 | scope = IFA_LINK; | |
2104 | } else { | |
2105 | scope = IPV6_ADDR_COMPATv4; | |
2106 | } | |
2107 | ||
2108 | if (addr.s6_addr32[3]) { | |
2109 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2110 | if (!IS_ERR(ifp)) { | |
2111 | spin_lock_bh(&ifp->lock); | |
2112 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2113 | spin_unlock_bh(&ifp->lock); | |
2114 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2115 | in6_ifa_put(ifp); | |
2116 | } | |
2117 | return; | |
2118 | } | |
2119 | ||
6fda7350 | 2120 | for_each_netdev(net, dev) { |
e5ed6399 | 2121 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2122 | if (in_dev && (dev->flags & IFF_UP)) { |
2123 | struct in_ifaddr * ifa; | |
2124 | ||
2125 | int flag = scope; | |
2126 | ||
2127 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2128 | int plen; | |
2129 | ||
2130 | addr.s6_addr32[3] = ifa->ifa_local; | |
2131 | ||
2132 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2133 | continue; | |
2134 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2135 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2136 | continue; | |
2137 | flag |= IFA_HOST; | |
2138 | } | |
2139 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2140 | plen = 64; | |
2141 | else | |
2142 | plen = 96; | |
2143 | ||
2144 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2145 | IFA_F_PERMANENT); | |
2146 | if (!IS_ERR(ifp)) { | |
2147 | spin_lock_bh(&ifp->lock); | |
2148 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2149 | spin_unlock_bh(&ifp->lock); | |
2150 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2151 | in6_ifa_put(ifp); | |
2152 | } | |
2153 | } | |
2154 | } | |
1ab1457c | 2155 | } |
1da177e4 | 2156 | } |
0be669bb | 2157 | #endif |
1da177e4 LT |
2158 | |
2159 | static void init_loopback(struct net_device *dev) | |
2160 | { | |
2161 | struct inet6_dev *idev; | |
2162 | struct inet6_ifaddr * ifp; | |
2163 | ||
2164 | /* ::1 */ | |
2165 | ||
2166 | ASSERT_RTNL(); | |
2167 | ||
2168 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2169 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2170 | return; | |
2171 | } | |
2172 | ||
2173 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, 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 | } | |
2182 | ||
2183 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2184 | { | |
2185 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2186 | u32 addr_flags = IFA_F_PERMANENT; |
2187 | ||
2188 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2189 | if (idev->cnf.optimistic_dad && | |
2190 | !ipv6_devconf.forwarding) | |
2191 | addr_flags |= IFA_F_OPTIMISTIC; | |
2192 | #endif | |
1da177e4 | 2193 | |
95c385b4 NH |
2194 | |
2195 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2196 | if (!IS_ERR(ifp)) { |
46d48046 | 2197 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2198 | addrconf_dad_start(ifp, 0); |
2199 | in6_ifa_put(ifp); | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | static void addrconf_dev_config(struct net_device *dev) | |
2204 | { | |
2205 | struct in6_addr addr; | |
2206 | struct inet6_dev * idev; | |
2207 | ||
2208 | ASSERT_RTNL(); | |
2209 | ||
74235a25 HX |
2210 | if ((dev->type != ARPHRD_ETHER) && |
2211 | (dev->type != ARPHRD_FDDI) && | |
2212 | (dev->type != ARPHRD_IEEE802_TR) && | |
2213 | (dev->type != ARPHRD_ARCNET) && | |
2214 | (dev->type != ARPHRD_INFINIBAND)) { | |
2215 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2216 | return; | |
2217 | } | |
2218 | ||
1da177e4 LT |
2219 | idev = addrconf_add_dev(dev); |
2220 | if (idev == NULL) | |
2221 | return; | |
2222 | ||
2223 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2224 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2225 | ||
2226 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2227 | addrconf_add_linklocal(idev, &addr); | |
2228 | } | |
2229 | ||
0be669bb | 2230 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2231 | static void addrconf_sit_config(struct net_device *dev) |
2232 | { | |
2233 | struct inet6_dev *idev; | |
2234 | ||
2235 | ASSERT_RTNL(); | |
2236 | ||
1ab1457c YH |
2237 | /* |
2238 | * Configure the tunnel with one of our IPv4 | |
2239 | * addresses... we should configure all of | |
1da177e4 LT |
2240 | * our v4 addrs in the tunnel |
2241 | */ | |
2242 | ||
2243 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2244 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2245 | return; | |
2246 | } | |
2247 | ||
c7dc89c0 FT |
2248 | if (dev->priv_flags & IFF_ISATAP) { |
2249 | struct in6_addr addr; | |
2250 | ||
2251 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2252 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2253 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2254 | addrconf_add_linklocal(idev, &addr); | |
2255 | return; | |
2256 | } | |
2257 | ||
1da177e4 LT |
2258 | sit_add_v4_addrs(idev); |
2259 | ||
2260 | if (dev->flags&IFF_POINTOPOINT) { | |
2261 | addrconf_add_mroute(dev); | |
2262 | addrconf_add_lroute(dev); | |
2263 | } else | |
2264 | sit_route_add(dev); | |
2265 | } | |
0be669bb | 2266 | #endif |
1da177e4 LT |
2267 | |
2268 | static inline int | |
2269 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2270 | { | |
2271 | struct in6_addr lladdr; | |
2272 | ||
95c385b4 | 2273 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2274 | addrconf_add_linklocal(idev, &lladdr); |
2275 | return 0; | |
2276 | } | |
2277 | return -1; | |
2278 | } | |
2279 | ||
2280 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2281 | { | |
2282 | struct net_device *link_dev; | |
c346dca1 | 2283 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2284 | |
2285 | /* first try to inherit the link-local address from the link device */ | |
2286 | if (idev->dev->iflink && | |
6fda7350 | 2287 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2288 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2289 | return; | |
2290 | } | |
2291 | /* then try to inherit it from any device */ | |
6fda7350 | 2292 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2293 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2294 | return; | |
2295 | } | |
2296 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2297 | } | |
2298 | ||
2299 | /* | |
2300 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2301 | * DHCPv6, MLD etc. can be run over the virtual link | |
2302 | */ | |
2303 | ||
2304 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2305 | { | |
2306 | struct inet6_dev *idev; | |
2307 | ||
2308 | ASSERT_RTNL(); | |
2309 | ||
2310 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2311 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2312 | return; | |
2313 | } | |
2314 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2315 | } |
2316 | ||
1ab1457c | 2317 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2318 | void * data) |
2319 | { | |
2320 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2321 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2322 | int run_pending = 0; |
b217d616 | 2323 | int err; |
1da177e4 LT |
2324 | |
2325 | switch(event) { | |
45ba9dd2 | 2326 | case NETDEV_REGISTER: |
74235a25 | 2327 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2328 | idev = ipv6_add_dev(dev); |
2329 | if (!idev) | |
b217d616 | 2330 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2331 | } |
2332 | break; | |
1da177e4 | 2333 | case NETDEV_UP: |
3c21edbd | 2334 | case NETDEV_CHANGE: |
c2edacf8 JV |
2335 | if (dev->flags & IFF_SLAVE) |
2336 | break; | |
2337 | ||
3c21edbd | 2338 | if (event == NETDEV_UP) { |
f24e3d65 | 2339 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2340 | /* device is not ready yet. */ |
2341 | printk(KERN_INFO | |
2342 | "ADDRCONF(NETDEV_UP): %s: " | |
2343 | "link is not ready\n", | |
2344 | dev->name); | |
2345 | break; | |
2346 | } | |
99081049 | 2347 | |
d31c7b8f EP |
2348 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2349 | idev = ipv6_add_dev(dev); | |
2350 | ||
99081049 KS |
2351 | if (idev) |
2352 | idev->if_flags |= IF_READY; | |
3c21edbd | 2353 | } else { |
f24e3d65 | 2354 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2355 | /* device is still not ready. */ |
2356 | break; | |
2357 | } | |
2358 | ||
2359 | if (idev) { | |
2360 | if (idev->if_flags & IF_READY) { | |
2361 | /* device is already configured. */ | |
2362 | break; | |
2363 | } | |
2364 | idev->if_flags |= IF_READY; | |
2365 | } | |
2366 | ||
2367 | printk(KERN_INFO | |
2368 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2369 | "link becomes ready\n", | |
2370 | dev->name); | |
2371 | ||
c5e33bdd | 2372 | run_pending = 1; |
3c21edbd YH |
2373 | } |
2374 | ||
1da177e4 | 2375 | switch(dev->type) { |
0be669bb | 2376 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2377 | case ARPHRD_SIT: |
2378 | addrconf_sit_config(dev); | |
2379 | break; | |
0be669bb | 2380 | #endif |
1da177e4 LT |
2381 | case ARPHRD_TUNNEL6: |
2382 | addrconf_ip6_tnl_config(dev); | |
2383 | break; | |
2384 | case ARPHRD_LOOPBACK: | |
2385 | init_loopback(dev); | |
2386 | break; | |
2387 | ||
2388 | default: | |
2389 | addrconf_dev_config(dev); | |
2390 | break; | |
3ff50b79 | 2391 | } |
1da177e4 | 2392 | if (idev) { |
c5e33bdd YH |
2393 | if (run_pending) |
2394 | addrconf_dad_run(idev); | |
2395 | ||
1da177e4 LT |
2396 | /* If the MTU changed during the interface down, when the |
2397 | interface up, the changed MTU must be reflected in the | |
2398 | idev as well as routers. | |
2399 | */ | |
2400 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2401 | rt6_mtu_change(dev, dev->mtu); | |
2402 | idev->cnf.mtu6 = dev->mtu; | |
2403 | } | |
2404 | idev->tstamp = jiffies; | |
2405 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2406 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2407 | stop IPv6 on this interface. | |
2408 | */ | |
2409 | if (dev->mtu < IPV6_MIN_MTU) | |
2410 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2411 | } | |
2412 | break; | |
2413 | ||
2414 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2415 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2416 | rt6_mtu_change(dev, dev->mtu); |
2417 | idev->cnf.mtu6 = dev->mtu; | |
2418 | break; | |
2419 | } | |
2420 | ||
d31c7b8f EP |
2421 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2422 | idev = ipv6_add_dev(dev); | |
2423 | if (idev) | |
2424 | break; | |
2425 | } | |
2426 | ||
1da177e4 LT |
2427 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2428 | ||
2429 | case NETDEV_DOWN: | |
2430 | case NETDEV_UNREGISTER: | |
2431 | /* | |
2432 | * Remove all addresses from this interface. | |
2433 | */ | |
2434 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2435 | break; | |
3c21edbd | 2436 | |
1da177e4 | 2437 | case NETDEV_CHANGENAME: |
1da177e4 | 2438 | if (idev) { |
5632c515 | 2439 | snmp6_unregister_dev(idev); |
408c4768 | 2440 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2441 | addrconf_sysctl_register(idev); |
b217d616 HX |
2442 | err = snmp6_register_dev(idev); |
2443 | if (err) | |
2444 | return notifier_from_errno(err); | |
5632c515 | 2445 | } |
1da177e4 | 2446 | break; |
3ff50b79 | 2447 | } |
1da177e4 LT |
2448 | |
2449 | return NOTIFY_OK; | |
2450 | } | |
2451 | ||
2452 | /* | |
2453 | * addrconf module should be notified of a device going up | |
2454 | */ | |
2455 | static struct notifier_block ipv6_dev_notf = { | |
2456 | .notifier_call = addrconf_notify, | |
2457 | .priority = 0 | |
2458 | }; | |
2459 | ||
2460 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2461 | { | |
2462 | struct inet6_dev *idev; | |
2463 | struct inet6_ifaddr *ifa, **bifa; | |
c346dca1 | 2464 | struct net *net = dev_net(dev); |
1da177e4 LT |
2465 | int i; |
2466 | ||
2467 | ASSERT_RTNL(); | |
2468 | ||
2774c7ab | 2469 | if (dev == init_net.loopback_dev && how == 1) |
1da177e4 LT |
2470 | how = 0; |
2471 | ||
f3db4851 | 2472 | rt6_ifdown(net, dev); |
1da177e4 LT |
2473 | neigh_ifdown(&nd_tbl, dev); |
2474 | ||
2475 | idev = __in6_dev_get(dev); | |
2476 | if (idev == NULL) | |
2477 | return -ENODEV; | |
2478 | ||
2479 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2480 | Do not dev_put! |
1da177e4 LT |
2481 | */ |
2482 | if (how == 1) { | |
1da177e4 | 2483 | idev->dead = 1; |
8814c4b5 YH |
2484 | |
2485 | /* protected by rtnl_lock */ | |
2486 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2487 | |
2488 | /* Step 1.5: remove snmp6 entry */ | |
2489 | snmp6_unregister_dev(idev); | |
2490 | ||
2491 | } | |
2492 | ||
2493 | /* Step 2: clear hash table */ | |
2494 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2495 | bifa = &inet6_addr_lst[i]; | |
2496 | ||
2497 | write_lock_bh(&addrconf_hash_lock); | |
2498 | while ((ifa = *bifa) != NULL) { | |
2499 | if (ifa->idev == idev) { | |
2500 | *bifa = ifa->lst_next; | |
2501 | ifa->lst_next = NULL; | |
2502 | addrconf_del_timer(ifa); | |
2503 | in6_ifa_put(ifa); | |
2504 | continue; | |
2505 | } | |
2506 | bifa = &ifa->lst_next; | |
2507 | } | |
2508 | write_unlock_bh(&addrconf_hash_lock); | |
2509 | } | |
2510 | ||
2511 | write_lock_bh(&idev->lock); | |
2512 | ||
2513 | /* Step 3: clear flags for stateless addrconf */ | |
2514 | if (how != 1) | |
3c21edbd | 2515 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2516 | |
2517 | /* Step 4: clear address list */ | |
2518 | #ifdef CONFIG_IPV6_PRIVACY | |
2519 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2520 | in6_dev_put(idev); | |
2521 | ||
2522 | /* clear tempaddr list */ | |
2523 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2524 | idev->tempaddr_list = ifa->tmp_next; | |
2525 | ifa->tmp_next = NULL; | |
2526 | ifa->dead = 1; | |
2527 | write_unlock_bh(&idev->lock); | |
2528 | spin_lock_bh(&ifa->lock); | |
2529 | ||
2530 | if (ifa->ifpub) { | |
2531 | in6_ifa_put(ifa->ifpub); | |
2532 | ifa->ifpub = NULL; | |
2533 | } | |
2534 | spin_unlock_bh(&ifa->lock); | |
2535 | in6_ifa_put(ifa); | |
2536 | write_lock_bh(&idev->lock); | |
2537 | } | |
2538 | #endif | |
2539 | while ((ifa = idev->addr_list) != NULL) { | |
2540 | idev->addr_list = ifa->if_next; | |
2541 | ifa->if_next = NULL; | |
2542 | ifa->dead = 1; | |
2543 | addrconf_del_timer(ifa); | |
2544 | write_unlock_bh(&idev->lock); | |
2545 | ||
2546 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2547 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2548 | in6_ifa_put(ifa); |
2549 | ||
2550 | write_lock_bh(&idev->lock); | |
2551 | } | |
2552 | write_unlock_bh(&idev->lock); | |
2553 | ||
2554 | /* Step 5: Discard multicast list */ | |
2555 | ||
2556 | if (how == 1) | |
2557 | ipv6_mc_destroy_dev(idev); | |
2558 | else | |
2559 | ipv6_mc_down(idev); | |
2560 | ||
1da177e4 | 2561 | idev->tstamp = jiffies; |
1ab1457c | 2562 | |
1da177e4 LT |
2563 | /* Shot the device (if unregistered) */ |
2564 | ||
2565 | if (how == 1) { | |
408c4768 | 2566 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2567 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2568 | neigh_ifdown(&nd_tbl, dev); | |
2569 | in6_dev_put(idev); | |
2570 | } | |
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | static void addrconf_rs_timer(unsigned long data) | |
2575 | { | |
2576 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2577 | ||
2578 | if (ifp->idev->cnf.forwarding) | |
2579 | goto out; | |
2580 | ||
2581 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2582 | /* | |
2583 | * Announcement received after solicitation | |
2584 | * was sent | |
2585 | */ | |
2586 | goto out; | |
2587 | } | |
2588 | ||
2589 | spin_lock(&ifp->lock); | |
2590 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2591 | struct in6_addr all_routers; | |
2592 | ||
2593 | /* The wait after the last probe can be shorter */ | |
2594 | addrconf_mod_timer(ifp, AC_RS, | |
2595 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2596 | ifp->idev->cnf.rtr_solicit_delay : | |
2597 | ifp->idev->cnf.rtr_solicit_interval); | |
2598 | spin_unlock(&ifp->lock); | |
2599 | ||
2600 | ipv6_addr_all_routers(&all_routers); | |
2601 | ||
2602 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2603 | } else { | |
2604 | spin_unlock(&ifp->lock); | |
2605 | /* | |
2606 | * Note: we do not support deprecated "all on-link" | |
2607 | * assumption any longer. | |
2608 | */ | |
2609 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2610 | ifp->idev->dev->name); | |
2611 | } | |
2612 | ||
2613 | out: | |
2614 | in6_ifa_put(ifp); | |
2615 | } | |
2616 | ||
2617 | /* | |
2618 | * Duplicate Address Detection | |
2619 | */ | |
3c21edbd YH |
2620 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2621 | { | |
2622 | unsigned long rand_num; | |
2623 | struct inet6_dev *idev = ifp->idev; | |
2624 | ||
95c385b4 NH |
2625 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2626 | rand_num = 0; | |
2627 | else | |
2628 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2629 | ||
3c21edbd YH |
2630 | ifp->probes = idev->cnf.dad_transmits; |
2631 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2632 | } | |
2633 | ||
e431b8c0 | 2634 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2635 | { |
2636 | struct inet6_dev *idev = ifp->idev; | |
2637 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2638 | |
2639 | addrconf_join_solict(dev, &ifp->addr); | |
2640 | ||
1da177e4 | 2641 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2642 | |
2643 | read_lock_bh(&idev->lock); | |
2644 | if (ifp->dead) | |
2645 | goto out; | |
2646 | spin_lock_bh(&ifp->lock); | |
2647 | ||
2648 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2649 | !(ifp->flags&IFA_F_TENTATIVE) || |
2650 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2651 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2652 | spin_unlock_bh(&ifp->lock); |
2653 | read_unlock_bh(&idev->lock); | |
2654 | ||
2655 | addrconf_dad_completed(ifp); | |
2656 | return; | |
2657 | } | |
2658 | ||
6732bade | 2659 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2660 | spin_unlock_bh(&ifp->lock); |
6732bade | 2661 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2662 | /* |
2663 | * If the defice is not ready: | |
2664 | * - keep it tentative if it is a permanent address. | |
2665 | * - otherwise, kill it. | |
2666 | */ | |
2667 | in6_ifa_hold(ifp); | |
2668 | addrconf_dad_stop(ifp); | |
6732bade | 2669 | return; |
3c21edbd | 2670 | } |
95c385b4 NH |
2671 | |
2672 | /* | |
2673 | * Optimistic nodes can start receiving | |
2674 | * Frames right away | |
2675 | */ | |
2676 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2677 | ip6_ins_rt(ifp->rt); | |
2678 | ||
6732bade YH |
2679 | addrconf_dad_kick(ifp); |
2680 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2681 | out: |
2682 | read_unlock_bh(&idev->lock); | |
2683 | } | |
2684 | ||
2685 | static void addrconf_dad_timer(unsigned long data) | |
2686 | { | |
2687 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2688 | struct inet6_dev *idev = ifp->idev; | |
2689 | struct in6_addr unspec; | |
2690 | struct in6_addr mcaddr; | |
2691 | ||
2692 | read_lock_bh(&idev->lock); | |
2693 | if (idev->dead) { | |
2694 | read_unlock_bh(&idev->lock); | |
2695 | goto out; | |
2696 | } | |
2697 | spin_lock_bh(&ifp->lock); | |
2698 | if (ifp->probes == 0) { | |
2699 | /* | |
2700 | * DAD was successful | |
2701 | */ | |
2702 | ||
95c385b4 | 2703 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2704 | spin_unlock_bh(&ifp->lock); |
2705 | read_unlock_bh(&idev->lock); | |
2706 | ||
2707 | addrconf_dad_completed(ifp); | |
2708 | ||
2709 | goto out; | |
2710 | } | |
2711 | ||
2712 | ifp->probes--; | |
2713 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2714 | spin_unlock_bh(&ifp->lock); | |
2715 | read_unlock_bh(&idev->lock); | |
2716 | ||
2717 | /* send a neighbour solicitation for our addr */ | |
2718 | memset(&unspec, 0, sizeof(unspec)); | |
2719 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2720 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2721 | out: | |
2722 | in6_ifa_put(ifp); | |
2723 | } | |
2724 | ||
2725 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2726 | { | |
2727 | struct net_device * dev = ifp->idev->dev; | |
2728 | ||
2729 | /* | |
2730 | * Configure the address for reception. Now it is valid. | |
2731 | */ | |
2732 | ||
2733 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2734 | ||
2735 | /* If added prefix is link local and forwarding is off, | |
2736 | start sending router solicitations. | |
2737 | */ | |
2738 | ||
2739 | if (ifp->idev->cnf.forwarding == 0 && | |
2740 | ifp->idev->cnf.rtr_solicits > 0 && | |
2741 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2742 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2743 | struct in6_addr all_routers; | |
2744 | ||
2745 | ipv6_addr_all_routers(&all_routers); | |
2746 | ||
2747 | /* | |
2748 | * If a host as already performed a random delay | |
2749 | * [...] as part of DAD [...] there is no need | |
2750 | * to delay again before sending the first RS | |
2751 | */ | |
2752 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2753 | ||
2754 | spin_lock_bh(&ifp->lock); | |
2755 | ifp->probes = 1; | |
2756 | ifp->idev->if_flags |= IF_RS_SENT; | |
2757 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2758 | spin_unlock_bh(&ifp->lock); | |
2759 | } | |
2760 | } | |
2761 | ||
c5e33bdd YH |
2762 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2763 | struct inet6_ifaddr *ifp; | |
2764 | ||
2765 | read_lock_bh(&idev->lock); | |
2766 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2767 | spin_lock_bh(&ifp->lock); | |
2768 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2769 | spin_unlock_bh(&ifp->lock); | |
2770 | continue; | |
2771 | } | |
2772 | spin_unlock_bh(&ifp->lock); | |
2773 | addrconf_dad_kick(ifp); | |
2774 | } | |
2775 | read_unlock_bh(&idev->lock); | |
2776 | } | |
2777 | ||
1da177e4 LT |
2778 | #ifdef CONFIG_PROC_FS |
2779 | struct if6_iter_state { | |
3c40090a | 2780 | struct seq_net_private p; |
1da177e4 LT |
2781 | int bucket; |
2782 | }; | |
2783 | ||
2784 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2785 | { | |
2786 | struct inet6_ifaddr *ifa = NULL; | |
2787 | struct if6_iter_state *state = seq->private; | |
1218854a | 2788 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2789 | |
2790 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2791 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2792 | |
878628fb | 2793 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2794 | ifa = ifa->lst_next; |
1da177e4 LT |
2795 | if (ifa) |
2796 | break; | |
2797 | } | |
2798 | return ifa; | |
2799 | } | |
2800 | ||
2801 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2802 | { | |
2803 | struct if6_iter_state *state = seq->private; | |
1218854a | 2804 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2805 | |
2806 | ifa = ifa->lst_next; | |
2807 | try_again: | |
3c40090a | 2808 | if (ifa) { |
878628fb | 2809 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2810 | ifa = ifa->lst_next; |
2811 | goto try_again; | |
2812 | } | |
2813 | } | |
2814 | ||
1da177e4 LT |
2815 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2816 | ifa = inet6_addr_lst[state->bucket]; | |
2817 | goto try_again; | |
2818 | } | |
3c40090a | 2819 | |
1da177e4 LT |
2820 | return ifa; |
2821 | } | |
2822 | ||
2823 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2824 | { | |
2825 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2826 | ||
2827 | if (ifa) | |
2828 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2829 | --pos; | |
2830 | return pos ? NULL : ifa; | |
2831 | } | |
2832 | ||
2833 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 2834 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
2835 | { |
2836 | read_lock_bh(&addrconf_hash_lock); | |
2837 | return if6_get_idx(seq, *pos); | |
2838 | } | |
2839 | ||
2840 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2841 | { | |
2842 | struct inet6_ifaddr *ifa; | |
2843 | ||
2844 | ifa = if6_get_next(seq, v); | |
2845 | ++*pos; | |
2846 | return ifa; | |
2847 | } | |
2848 | ||
2849 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 2850 | __releases(addrconf_hash_lock) |
1da177e4 LT |
2851 | { |
2852 | read_unlock_bh(&addrconf_hash_lock); | |
2853 | } | |
2854 | ||
2855 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2856 | { | |
2857 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2858 | seq_printf(seq, | |
9343e79a | 2859 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2860 | NIP6(ifp->addr), |
2861 | ifp->idev->dev->ifindex, | |
2862 | ifp->prefix_len, | |
2863 | ifp->scope, | |
2864 | ifp->flags, | |
2865 | ifp->idev->dev->name); | |
2866 | return 0; | |
2867 | } | |
2868 | ||
56b3d975 | 2869 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2870 | .start = if6_seq_start, |
2871 | .next = if6_seq_next, | |
2872 | .show = if6_seq_show, | |
2873 | .stop = if6_seq_stop, | |
2874 | }; | |
2875 | ||
2876 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2877 | { | |
3c40090a DL |
2878 | return seq_open_net(inode, file, &if6_seq_ops, |
2879 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
2880 | } |
2881 | ||
9a32144e | 2882 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2883 | .owner = THIS_MODULE, |
2884 | .open = if6_seq_open, | |
2885 | .read = seq_read, | |
2886 | .llseek = seq_lseek, | |
3c40090a | 2887 | .release = seq_release_net, |
1da177e4 LT |
2888 | }; |
2889 | ||
3c40090a | 2890 | static int if6_proc_net_init(struct net *net) |
1da177e4 | 2891 | { |
3c40090a | 2892 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
2893 | return -ENOMEM; |
2894 | return 0; | |
2895 | } | |
2896 | ||
3c40090a DL |
2897 | static void if6_proc_net_exit(struct net *net) |
2898 | { | |
2899 | proc_net_remove(net, "if_inet6"); | |
2900 | } | |
2901 | ||
2902 | static struct pernet_operations if6_proc_net_ops = { | |
2903 | .init = if6_proc_net_init, | |
2904 | .exit = if6_proc_net_exit, | |
2905 | }; | |
2906 | ||
2907 | int __init if6_proc_init(void) | |
2908 | { | |
2909 | return register_pernet_subsys(&if6_proc_net_ops); | |
2910 | } | |
2911 | ||
1da177e4 LT |
2912 | void if6_proc_exit(void) |
2913 | { | |
3c40090a | 2914 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
2915 | } |
2916 | #endif /* CONFIG_PROC_FS */ | |
2917 | ||
59fbb3a6 | 2918 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 2919 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 2920 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
2921 | { |
2922 | int ret = 0; | |
2923 | struct inet6_ifaddr * ifp; | |
2924 | u8 hash = ipv6_addr_hash(addr); | |
2925 | read_lock_bh(&addrconf_hash_lock); | |
2926 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 2927 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 2928 | continue; |
3b9f9a1c NT |
2929 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && |
2930 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2931 | ret = 1; | |
2932 | break; | |
2933 | } | |
2934 | } | |
2935 | read_unlock_bh(&addrconf_hash_lock); | |
2936 | return ret; | |
2937 | } | |
2938 | #endif | |
2939 | ||
1da177e4 LT |
2940 | /* |
2941 | * Periodic address status verification | |
2942 | */ | |
2943 | ||
2944 | static void addrconf_verify(unsigned long foo) | |
2945 | { | |
2946 | struct inet6_ifaddr *ifp; | |
2947 | unsigned long now, next; | |
2948 | int i; | |
2949 | ||
2950 | spin_lock_bh(&addrconf_verify_lock); | |
2951 | now = jiffies; | |
2952 | next = now + ADDR_CHECK_FREQUENCY; | |
2953 | ||
2954 | del_timer(&addr_chk_timer); | |
2955 | ||
2956 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2957 | ||
2958 | restart: | |
5d5780df | 2959 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2960 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2961 | unsigned long age; | |
2962 | #ifdef CONFIG_IPV6_PRIVACY | |
2963 | unsigned long regen_advance; | |
2964 | #endif | |
2965 | ||
2966 | if (ifp->flags & IFA_F_PERMANENT) | |
2967 | continue; | |
2968 | ||
2969 | spin_lock(&ifp->lock); | |
2970 | age = (now - ifp->tstamp) / HZ; | |
2971 | ||
2972 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2973 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2974 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2975 | ifp->idev->nd_parms->retrans_time / HZ; |
2976 | #endif | |
2977 | ||
8f27ebb9 YH |
2978 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2979 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2980 | spin_unlock(&ifp->lock); |
2981 | in6_ifa_hold(ifp); | |
5d5780df | 2982 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2983 | ipv6_del_addr(ifp); |
2984 | goto restart; | |
8f27ebb9 YH |
2985 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2986 | spin_unlock(&ifp->lock); | |
2987 | continue; | |
1da177e4 LT |
2988 | } else if (age >= ifp->prefered_lft) { |
2989 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2990 | int deprecate = 0; | |
2991 | ||
2992 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2993 | deprecate = 1; | |
2994 | ifp->flags |= IFA_F_DEPRECATED; | |
2995 | } | |
2996 | ||
2997 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2998 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2999 | ||
3000 | spin_unlock(&ifp->lock); | |
3001 | ||
3002 | if (deprecate) { | |
3003 | in6_ifa_hold(ifp); | |
5d5780df | 3004 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3005 | |
3006 | ipv6_ifa_notify(0, ifp); | |
3007 | in6_ifa_put(ifp); | |
3008 | goto restart; | |
3009 | } | |
3010 | #ifdef CONFIG_IPV6_PRIVACY | |
3011 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3012 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3013 | if (age >= ifp->prefered_lft - regen_advance) { | |
3014 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3015 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3016 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3017 | if (!ifp->regen_count && ifpub) { | |
3018 | ifp->regen_count++; | |
3019 | in6_ifa_hold(ifp); | |
3020 | in6_ifa_hold(ifpub); | |
3021 | spin_unlock(&ifp->lock); | |
5d5780df | 3022 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3023 | spin_lock(&ifpub->lock); |
3024 | ifpub->regen_count = 0; | |
3025 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3026 | ipv6_create_tempaddr(ifpub, ifp); |
3027 | in6_ifa_put(ifpub); | |
3028 | in6_ifa_put(ifp); | |
3029 | goto restart; | |
3030 | } | |
3031 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3032 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3033 | spin_unlock(&ifp->lock); | |
3034 | #endif | |
3035 | } else { | |
3036 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3037 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3038 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3039 | spin_unlock(&ifp->lock); | |
3040 | } | |
3041 | } | |
5d5780df | 3042 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3043 | } |
3044 | ||
3045 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3046 | add_timer(&addr_chk_timer); | |
3047 | spin_unlock_bh(&addrconf_verify_lock); | |
3048 | } | |
3049 | ||
461d8837 TG |
3050 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3051 | { | |
3052 | struct in6_addr *pfx = NULL; | |
3053 | ||
3054 | if (addr) | |
3055 | pfx = nla_data(addr); | |
3056 | ||
3057 | if (local) { | |
3058 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3059 | pfx = NULL; | |
3060 | else | |
3061 | pfx = nla_data(local); | |
3062 | } | |
3063 | ||
3064 | return pfx; | |
3065 | } | |
3066 | ||
ef7c79ed | 3067 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3068 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3069 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3070 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3071 | }; | |
3072 | ||
1da177e4 LT |
3073 | static int |
3074 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3075 | { | |
3b1e0a65 | 3076 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3077 | struct ifaddrmsg *ifm; |
3078 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3079 | struct in6_addr *pfx; |
b933f716 | 3080 | int err; |
1da177e4 | 3081 | |
b933f716 TG |
3082 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3083 | if (err < 0) | |
3084 | return err; | |
3085 | ||
3086 | ifm = nlmsg_data(nlh); | |
3087 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3088 | if (pfx == NULL) |
3089 | return -EINVAL; | |
3090 | ||
af284937 | 3091 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3092 | } |
3093 | ||
55ebaef1 NT |
3094 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3095 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3096 | { |
46d48046 YH |
3097 | u32 flags = RTF_EXPIRES; |
3098 | ||
081bba5b NT |
3099 | if (!valid_lft || (prefered_lft > valid_lft)) |
3100 | return -EINVAL; | |
3101 | ||
46d48046 | 3102 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 3103 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
3104 | flags = 0; |
3105 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
3106 | valid_lft = 0x7FFFFFFF/HZ; |
3107 | ||
3108 | if (prefered_lft == 0) | |
55ebaef1 | 3109 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
3110 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
3111 | (prefered_lft != INFINITY_LIFE_TIME)) | |
3112 | prefered_lft = 0x7FFFFFFF/HZ; | |
3113 | ||
3114 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3115 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3116 | ifp->tstamp = jiffies; |
3117 | ifp->valid_lft = valid_lft; | |
3118 | ifp->prefered_lft = prefered_lft; | |
3119 | ||
3120 | spin_unlock_bh(&ifp->lock); | |
3121 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3122 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3123 | |
46d48046 YH |
3124 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3125 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3126 | addrconf_verify(0); |
3127 | ||
3128 | return 0; | |
3129 | } | |
3130 | ||
1da177e4 LT |
3131 | static int |
3132 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3133 | { | |
3b1e0a65 | 3134 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3135 | struct ifaddrmsg *ifm; |
3136 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3137 | struct in6_addr *pfx; |
7198f8ce TG |
3138 | struct inet6_ifaddr *ifa; |
3139 | struct net_device *dev; | |
55ebaef1 NT |
3140 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3141 | u8 ifa_flags; | |
461d8837 | 3142 | int err; |
1da177e4 | 3143 | |
461d8837 TG |
3144 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3145 | if (err < 0) | |
3146 | return err; | |
3147 | ||
3148 | ifm = nlmsg_data(nlh); | |
3149 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3150 | if (pfx == NULL) |
3151 | return -EINVAL; | |
3152 | ||
461d8837 | 3153 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3154 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3155 | |
3156 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3157 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3158 | preferred_lft = ci->ifa_prefered; |
3159 | } else { | |
3160 | preferred_lft = INFINITY_LIFE_TIME; | |
3161 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3162 | } |
3163 | ||
af284937 | 3164 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3165 | if (dev == NULL) |
3166 | return -ENODEV; | |
3167 | ||
55ebaef1 | 3168 | /* We ignore other flags so far. */ |
3b9f9a1c | 3169 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3170 | |
1cab3da6 | 3171 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3172 | if (ifa == NULL) { |
3173 | /* | |
3174 | * It would be best to check for !NLM_F_CREATE here but | |
3175 | * userspace alreay relies on not having to provide this. | |
3176 | */ | |
af284937 DL |
3177 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3178 | ifm->ifa_prefixlen, ifa_flags, | |
3179 | preferred_lft, valid_lft); | |
081bba5b NT |
3180 | } |
3181 | ||
7198f8ce TG |
3182 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3183 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3184 | err = -EEXIST; | |
3185 | else | |
55ebaef1 | 3186 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3187 | |
3188 | in6_ifa_put(ifa); | |
3189 | ||
3190 | return err; | |
1da177e4 LT |
3191 | } |
3192 | ||
101bb229 TG |
3193 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3194 | u8 scope, int ifindex) | |
3195 | { | |
3196 | struct ifaddrmsg *ifm; | |
3197 | ||
3198 | ifm = nlmsg_data(nlh); | |
3199 | ifm->ifa_family = AF_INET6; | |
3200 | ifm->ifa_prefixlen = prefixlen; | |
3201 | ifm->ifa_flags = flags; | |
3202 | ifm->ifa_scope = scope; | |
3203 | ifm->ifa_index = ifindex; | |
3204 | } | |
3205 | ||
85486af0 TG |
3206 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3207 | unsigned long tstamp, u32 preferred, u32 valid) | |
3208 | { | |
3209 | struct ifa_cacheinfo ci; | |
3210 | ||
3211 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3212 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3213 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3214 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3215 | ci.ifa_prefered = preferred; | |
3216 | ci.ifa_valid = valid; | |
3217 | ||
3218 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3219 | } | |
3220 | ||
101bb229 TG |
3221 | static inline int rt_scope(int ifa_scope) |
3222 | { | |
3223 | if (ifa_scope & IFA_HOST) | |
3224 | return RT_SCOPE_HOST; | |
3225 | else if (ifa_scope & IFA_LINK) | |
3226 | return RT_SCOPE_LINK; | |
3227 | else if (ifa_scope & IFA_SITE) | |
3228 | return RT_SCOPE_SITE; | |
3229 | else | |
3230 | return RT_SCOPE_UNIVERSE; | |
3231 | } | |
3232 | ||
0ab6803b TG |
3233 | static inline int inet6_ifaddr_msgsize(void) |
3234 | { | |
339bf98f TG |
3235 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3236 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3237 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3238 | } |
c5396a31 | 3239 | |
1da177e4 | 3240 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3241 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3242 | { |
1da177e4 | 3243 | struct nlmsghdr *nlh; |
85486af0 | 3244 | u32 preferred, valid; |
1da177e4 | 3245 | |
0ab6803b TG |
3246 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3247 | if (nlh == NULL) | |
26932566 | 3248 | return -EMSGSIZE; |
0ab6803b | 3249 | |
101bb229 TG |
3250 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3251 | ifa->idev->dev->ifindex); | |
3252 | ||
1da177e4 | 3253 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3254 | preferred = ifa->prefered_lft; |
3255 | valid = ifa->valid_lft; | |
3256 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3257 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3258 | preferred -= tval; |
3259 | if (valid != INFINITY_LIFE_TIME) | |
3260 | valid -= tval; | |
1da177e4 LT |
3261 | } |
3262 | } else { | |
85486af0 TG |
3263 | preferred = INFINITY_LIFE_TIME; |
3264 | valid = INFINITY_LIFE_TIME; | |
3265 | } | |
3266 | ||
0ab6803b | 3267 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3268 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3269 | nlmsg_cancel(skb, nlh); | |
3270 | return -EMSGSIZE; | |
3271 | } | |
1da177e4 | 3272 | |
0ab6803b | 3273 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3274 | } |
3275 | ||
3276 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3277 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3278 | { |
1da177e4 | 3279 | struct nlmsghdr *nlh; |
101bb229 TG |
3280 | u8 scope = RT_SCOPE_UNIVERSE; |
3281 | int ifindex = ifmca->idev->dev->ifindex; | |
3282 | ||
3283 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3284 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3285 | |
0ab6803b TG |
3286 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3287 | if (nlh == NULL) | |
26932566 | 3288 | return -EMSGSIZE; |
85486af0 | 3289 | |
0ab6803b TG |
3290 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3291 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3292 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3293 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3294 | nlmsg_cancel(skb, nlh); | |
3295 | return -EMSGSIZE; | |
3296 | } | |
85486af0 | 3297 | |
0ab6803b | 3298 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3299 | } |
3300 | ||
3301 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3302 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3303 | { |
1da177e4 | 3304 | struct nlmsghdr *nlh; |
101bb229 TG |
3305 | u8 scope = RT_SCOPE_UNIVERSE; |
3306 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3307 | ||
3308 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3309 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3310 | |
0ab6803b TG |
3311 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3312 | if (nlh == NULL) | |
26932566 | 3313 | return -EMSGSIZE; |
85486af0 | 3314 | |
0ab6803b TG |
3315 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3316 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3317 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3318 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3319 | nlmsg_cancel(skb, nlh); | |
3320 | return -EMSGSIZE; | |
3321 | } | |
1da177e4 | 3322 | |
0ab6803b | 3323 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3324 | } |
3325 | ||
3326 | enum addr_type_t | |
3327 | { | |
3328 | UNICAST_ADDR, | |
3329 | MULTICAST_ADDR, | |
3330 | ANYCAST_ADDR, | |
3331 | }; | |
3332 | ||
3333 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3334 | enum addr_type_t type) | |
3335 | { | |
3336 | int idx, ip_idx; | |
3337 | int s_idx, s_ip_idx; | |
3338 | int err = 1; | |
3339 | struct net_device *dev; | |
3340 | struct inet6_dev *idev = NULL; | |
3341 | struct inet6_ifaddr *ifa; | |
3342 | struct ifmcaddr6 *ifmca; | |
3343 | struct ifacaddr6 *ifaca; | |
3b1e0a65 | 3344 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3345 | |
3346 | s_idx = cb->args[0]; | |
3347 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3348 | |
7562f876 | 3349 | idx = 0; |
6fda7350 | 3350 | for_each_netdev(net, dev) { |
1da177e4 | 3351 | if (idx < s_idx) |
7562f876 | 3352 | goto cont; |
1da177e4 LT |
3353 | if (idx > s_idx) |
3354 | s_ip_idx = 0; | |
3355 | ip_idx = 0; | |
3356 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3357 | goto cont; |
1da177e4 LT |
3358 | read_lock_bh(&idev->lock); |
3359 | switch (type) { | |
3360 | case UNICAST_ADDR: | |
ae9cda5d | 3361 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3362 | for (ifa = idev->addr_list; ifa; |
3363 | ifa = ifa->if_next, ip_idx++) { | |
3364 | if (ip_idx < s_ip_idx) | |
3365 | continue; | |
5d5619b4 YH |
3366 | err = inet6_fill_ifaddr(skb, ifa, |
3367 | NETLINK_CB(cb->skb).pid, | |
3368 | cb->nlh->nlmsg_seq, | |
3369 | RTM_NEWADDR, | |
3370 | NLM_F_MULTI); | |
1da177e4 | 3371 | } |
1da177e4 LT |
3372 | break; |
3373 | case MULTICAST_ADDR: | |
3374 | /* multicast address */ | |
1ab1457c | 3375 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3376 | ifmca = ifmca->next, ip_idx++) { |
3377 | if (ip_idx < s_ip_idx) | |
3378 | continue; | |
5d5619b4 YH |
3379 | err = inet6_fill_ifmcaddr(skb, ifmca, |
3380 | NETLINK_CB(cb->skb).pid, | |
3381 | cb->nlh->nlmsg_seq, | |
3382 | RTM_GETMULTICAST, | |
3383 | NLM_F_MULTI); | |
1da177e4 LT |
3384 | } |
3385 | break; | |
3386 | case ANYCAST_ADDR: | |
3387 | /* anycast address */ | |
3388 | for (ifaca = idev->ac_list; ifaca; | |
3389 | ifaca = ifaca->aca_next, ip_idx++) { | |
3390 | if (ip_idx < s_ip_idx) | |
3391 | continue; | |
5d5619b4 YH |
3392 | err = inet6_fill_ifacaddr(skb, ifaca, |
3393 | NETLINK_CB(cb->skb).pid, | |
3394 | cb->nlh->nlmsg_seq, | |
3395 | RTM_GETANYCAST, | |
3396 | NLM_F_MULTI); | |
1da177e4 LT |
3397 | } |
3398 | break; | |
3399 | default: | |
3400 | break; | |
3401 | } | |
3402 | read_unlock_bh(&idev->lock); | |
3403 | in6_dev_put(idev); | |
5d5619b4 YH |
3404 | |
3405 | if (err <= 0) | |
3406 | break; | |
7562f876 PE |
3407 | cont: |
3408 | idx++; | |
1da177e4 | 3409 | } |
1da177e4 LT |
3410 | cb->args[0] = idx; |
3411 | cb->args[1] = ip_idx; | |
3412 | return skb->len; | |
3413 | } | |
3414 | ||
3415 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3416 | { | |
3417 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3418 | |
1da177e4 LT |
3419 | return inet6_dump_addr(skb, cb, type); |
3420 | } | |
3421 | ||
3422 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3423 | { | |
3424 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3425 | |
1da177e4 LT |
3426 | return inet6_dump_addr(skb, cb, type); |
3427 | } | |
3428 | ||
3429 | ||
3430 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3431 | { | |
3432 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3433 | |
1da177e4 LT |
3434 | return inet6_dump_addr(skb, cb, type); |
3435 | } | |
3436 | ||
1b29fc2c TG |
3437 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3438 | void *arg) | |
6c223828 | 3439 | { |
3b1e0a65 | 3440 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3441 | struct ifaddrmsg *ifm; |
3442 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3443 | struct in6_addr *addr = NULL; |
3444 | struct net_device *dev = NULL; | |
3445 | struct inet6_ifaddr *ifa; | |
3446 | struct sk_buff *skb; | |
6c223828 NT |
3447 | int err; |
3448 | ||
1b29fc2c TG |
3449 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3450 | if (err < 0) | |
3451 | goto errout; | |
3452 | ||
3453 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3454 | if (addr == NULL) { | |
3455 | err = -EINVAL; | |
3456 | goto errout; | |
6c223828 | 3457 | } |
6c223828 | 3458 | |
1b29fc2c | 3459 | ifm = nlmsg_data(nlh); |
6c223828 | 3460 | if (ifm->ifa_index) |
6fda7350 | 3461 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3462 | |
1cab3da6 | 3463 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3464 | err = -EADDRNOTAVAIL; |
3465 | goto errout; | |
3466 | } | |
6c223828 | 3467 | |
0ab6803b | 3468 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3469 | err = -ENOBUFS; |
1b29fc2c | 3470 | goto errout_ifa; |
6c223828 NT |
3471 | } |
3472 | ||
6c223828 NT |
3473 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3474 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3475 | if (err < 0) { |
3476 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3477 | WARN_ON(err == -EMSGSIZE); | |
3478 | kfree_skb(skb); | |
3479 | goto errout_ifa; | |
3480 | } | |
6fda7350 | 3481 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3482 | errout_ifa: |
6c223828 | 3483 | in6_ifa_put(ifa); |
1b29fc2c | 3484 | errout: |
6c223828 | 3485 | return err; |
6c223828 NT |
3486 | } |
3487 | ||
1da177e4 LT |
3488 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3489 | { | |
3490 | struct sk_buff *skb; | |
c346dca1 | 3491 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3492 | int err = -ENOBUFS; |
1da177e4 | 3493 | |
0ab6803b | 3494 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3495 | if (skb == NULL) |
3496 | goto errout; | |
3497 | ||
3498 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3499 | if (err < 0) { |
3500 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3501 | WARN_ON(err == -EMSGSIZE); | |
3502 | kfree_skb(skb); | |
3503 | goto errout; | |
3504 | } | |
6fda7350 | 3505 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5d620266 TG |
3506 | errout: |
3507 | if (err < 0) | |
6fda7350 | 3508 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3509 | } |
3510 | ||
b6f99a21 | 3511 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3512 | __s32 *array, int bytes) |
3513 | { | |
04561c1f TG |
3514 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3515 | ||
1da177e4 LT |
3516 | memset(array, 0, bytes); |
3517 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3518 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3519 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3520 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3521 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3522 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3523 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3524 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3525 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3526 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3527 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3528 | #ifdef CONFIG_IPV6_PRIVACY | |
3529 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3530 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3531 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3532 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3533 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3534 | #endif | |
3535 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3536 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3537 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3538 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3539 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3540 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3541 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3542 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3543 | #endif | |
930d6ff2 | 3544 | #endif |
fbea49e1 | 3545 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3546 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3547 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3548 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3549 | #endif | |
7bc570c8 YH |
3550 | #ifdef CONFIG_IPV6_MROUTE |
3551 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3552 | #endif | |
1da177e4 LT |
3553 | } |
3554 | ||
339bf98f TG |
3555 | static inline size_t inet6_if_nlmsg_size(void) |
3556 | { | |
3557 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3558 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3559 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3560 | + nla_total_size(4) /* IFLA_MTU */ | |
3561 | + nla_total_size(4) /* IFLA_LINK */ | |
3562 | + nla_total_size( /* IFLA_PROTINFO */ | |
3563 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3564 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3565 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3566 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3567 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3568 | ); |
3569 | } | |
c5396a31 | 3570 | |
7f7d9a6b HX |
3571 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3572 | int bytes) | |
3573 | { | |
3574 | int i; | |
3575 | int pad = bytes - sizeof(u64) * items; | |
3576 | BUG_ON(pad < 0); | |
3577 | ||
3578 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3579 | put_unaligned(items, &stats[0]); | |
3580 | for (i = 1; i < items; i++) | |
3581 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3582 | ||
3583 | memset(&stats[items], 0, pad); | |
3584 | } | |
3585 | ||
3586 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3587 | int bytes) | |
3588 | { | |
3589 | switch(attrtype) { | |
3590 | case IFLA_INET6_STATS: | |
3591 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3592 | break; | |
3593 | case IFLA_INET6_ICMP6STATS: | |
3594 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3595 | break; | |
3596 | } | |
3597 | } | |
3598 | ||
1ab1457c | 3599 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3600 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3601 | { |
04561c1f | 3602 | struct net_device *dev = idev->dev; |
bf99f1bd | 3603 | struct nlattr *nla; |
04561c1f TG |
3604 | struct ifinfomsg *hdr; |
3605 | struct nlmsghdr *nlh; | |
3606 | void *protoinfo; | |
3607 | struct ifla_cacheinfo ci; | |
3608 | ||
3609 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3610 | if (nlh == NULL) | |
26932566 | 3611 | return -EMSGSIZE; |
04561c1f TG |
3612 | |
3613 | hdr = nlmsg_data(nlh); | |
3614 | hdr->ifi_family = AF_INET6; | |
3615 | hdr->__ifi_pad = 0; | |
3616 | hdr->ifi_type = dev->type; | |
3617 | hdr->ifi_index = dev->ifindex; | |
3618 | hdr->ifi_flags = dev_get_flags(dev); | |
3619 | hdr->ifi_change = 0; | |
3620 | ||
3621 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3622 | |
3623 | if (dev->addr_len) | |
04561c1f | 3624 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3625 | |
04561c1f | 3626 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3627 | if (dev->ifindex != dev->iflink) |
04561c1f | 3628 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3629 | |
04561c1f TG |
3630 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3631 | if (protoinfo == NULL) | |
3632 | goto nla_put_failure; | |
1da177e4 | 3633 | |
04561c1f | 3634 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3635 | |
1da177e4 LT |
3636 | ci.max_reasm_len = IPV6_MAXPLEN; |
3637 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3638 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3639 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3640 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3641 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3642 | ||
bf99f1bd YH |
3643 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3644 | if (nla == NULL) | |
04561c1f | 3645 | goto nla_put_failure; |
bf99f1bd | 3646 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3647 | |
bf99f1bd YH |
3648 | /* XXX - MC not implemented */ |
3649 | ||
3650 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3651 | if (nla == NULL) | |
3652 | goto nla_put_failure; | |
3653 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3654 | ||
3655 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3656 | if (nla == NULL) | |
3657 | goto nla_put_failure; | |
3658 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3659 | |
04561c1f TG |
3660 | nla_nest_end(skb, protoinfo); |
3661 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3662 | |
04561c1f | 3663 | nla_put_failure: |
26932566 PM |
3664 | nlmsg_cancel(skb, nlh); |
3665 | return -EMSGSIZE; | |
1da177e4 LT |
3666 | } |
3667 | ||
3668 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3669 | { | |
3b1e0a65 | 3670 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3671 | int idx, err; |
3672 | int s_idx = cb->args[0]; | |
3673 | struct net_device *dev; | |
3674 | struct inet6_dev *idev; | |
3675 | ||
3676 | read_lock(&dev_base_lock); | |
7562f876 | 3677 | idx = 0; |
6fda7350 | 3678 | for_each_netdev(net, dev) { |
1da177e4 | 3679 | if (idx < s_idx) |
7562f876 | 3680 | goto cont; |
1da177e4 | 3681 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3682 | goto cont; |
1ab1457c | 3683 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3684 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3685 | in6_dev_put(idev); |
3686 | if (err <= 0) | |
3687 | break; | |
7562f876 PE |
3688 | cont: |
3689 | idx++; | |
1da177e4 LT |
3690 | } |
3691 | read_unlock(&dev_base_lock); | |
3692 | cb->args[0] = idx; | |
3693 | ||
3694 | return skb->len; | |
3695 | } | |
3696 | ||
3697 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3698 | { | |
3699 | struct sk_buff *skb; | |
c346dca1 | 3700 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3701 | int err = -ENOBUFS; |
1ab1457c | 3702 | |
339bf98f | 3703 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3704 | if (skb == NULL) |
3705 | goto errout; | |
3706 | ||
3707 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3708 | if (err < 0) { |
3709 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3710 | WARN_ON(err == -EMSGSIZE); | |
3711 | kfree_skb(skb); | |
3712 | goto errout; | |
3713 | } | |
6fda7350 | 3714 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
8d7a76c9 TG |
3715 | errout: |
3716 | if (err < 0) | |
6fda7350 | 3717 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3718 | } |
3719 | ||
339bf98f TG |
3720 | static inline size_t inet6_prefix_nlmsg_size(void) |
3721 | { | |
3722 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3723 | + nla_total_size(sizeof(struct in6_addr)) | |
3724 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3725 | } | |
c5396a31 | 3726 | |
1da177e4 | 3727 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3728 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3729 | int event, unsigned int flags) | |
1da177e4 | 3730 | { |
6051e2f4 TG |
3731 | struct prefixmsg *pmsg; |
3732 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3733 | struct prefix_cacheinfo ci; |
3734 | ||
6051e2f4 TG |
3735 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3736 | if (nlh == NULL) | |
26932566 | 3737 | return -EMSGSIZE; |
6051e2f4 TG |
3738 | |
3739 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3740 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3741 | pmsg->prefix_pad1 = 0; |
3742 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3743 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3744 | pmsg->prefix_len = pinfo->prefix_len; | |
3745 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3746 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3747 | pmsg->prefix_flags = 0; |
3748 | if (pinfo->onlink) | |
3749 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3750 | if (pinfo->autoconf) | |
3751 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3752 | ||
6051e2f4 | 3753 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3754 | |
3755 | ci.preferred_time = ntohl(pinfo->prefered); | |
3756 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3757 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3758 | |
6051e2f4 | 3759 | return nlmsg_end(skb, nlh); |
1da177e4 | 3760 | |
6051e2f4 | 3761 | nla_put_failure: |
26932566 PM |
3762 | nlmsg_cancel(skb, nlh); |
3763 | return -EMSGSIZE; | |
1da177e4 LT |
3764 | } |
3765 | ||
1ab1457c | 3766 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3767 | struct prefix_info *pinfo) |
3768 | { | |
3769 | struct sk_buff *skb; | |
c346dca1 | 3770 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3771 | int err = -ENOBUFS; |
1da177e4 | 3772 | |
339bf98f | 3773 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3774 | if (skb == NULL) |
3775 | goto errout; | |
3776 | ||
3777 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3778 | if (err < 0) { |
3779 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3780 | WARN_ON(err == -EMSGSIZE); | |
3781 | kfree_skb(skb); | |
3782 | goto errout; | |
3783 | } | |
6fda7350 | 3784 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
8c384bfa TG |
3785 | errout: |
3786 | if (err < 0) | |
6fda7350 | 3787 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3788 | } |
3789 | ||
1da177e4 LT |
3790 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3791 | { | |
3792 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3793 | ||
3794 | switch (event) { | |
3795 | case RTM_NEWADDR: | |
95c385b4 NH |
3796 | /* |
3797 | * If the address was optimistic | |
3798 | * we inserted the route at the start of | |
3799 | * our DAD process, so we don't need | |
3800 | * to do it again | |
3801 | */ | |
3802 | if (!(ifp->rt->rt6i_node)) | |
3803 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3804 | if (ifp->idev->cnf.forwarding) |
3805 | addrconf_join_anycast(ifp); | |
3806 | break; | |
3807 | case RTM_DELADDR: | |
3808 | if (ifp->idev->cnf.forwarding) | |
3809 | addrconf_leave_anycast(ifp); | |
3810 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3811 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3812 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3813 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3814 | break; |
3815 | } | |
3816 | } | |
3817 | ||
3818 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3819 | { | |
8814c4b5 | 3820 | rcu_read_lock_bh(); |
1da177e4 LT |
3821 | if (likely(ifp->idev->dead == 0)) |
3822 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3823 | rcu_read_unlock_bh(); |
1da177e4 LT |
3824 | } |
3825 | ||
3826 | #ifdef CONFIG_SYSCTL | |
3827 | ||
3828 | static | |
3829 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3830 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3831 | { | |
3832 | int *valp = ctl->data; | |
3833 | int val = *valp; | |
3834 | int ret; | |
3835 | ||
3836 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3837 | ||
c8fecf22 PE |
3838 | if (write) |
3839 | addrconf_fixup_forwarding(ctl, valp, val); | |
1ab1457c | 3840 | return ret; |
1da177e4 LT |
3841 | } |
3842 | ||
1ab1457c | 3843 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3844 | int __user *name, int nlen, |
3845 | void __user *oldval, | |
3846 | size_t __user *oldlenp, | |
1f29bcd7 | 3847 | void __user *newval, size_t newlen) |
1da177e4 LT |
3848 | { |
3849 | int *valp = table->data; | |
c8fecf22 | 3850 | int val = *valp; |
1da177e4 LT |
3851 | int new; |
3852 | ||
3853 | if (!newval || !newlen) | |
3854 | return 0; | |
3855 | if (newlen != sizeof(int)) | |
3856 | return -EINVAL; | |
3857 | if (get_user(new, (int __user *)newval)) | |
3858 | return -EFAULT; | |
3859 | if (new == *valp) | |
3860 | return 0; | |
3861 | if (oldval && oldlenp) { | |
3862 | size_t len; | |
3863 | if (get_user(len, oldlenp)) | |
3864 | return -EFAULT; | |
3865 | if (len) { | |
3866 | if (len > table->maxlen) | |
3867 | len = table->maxlen; | |
3868 | if (copy_to_user(oldval, valp, len)) | |
3869 | return -EFAULT; | |
3870 | if (put_user(len, oldlenp)) | |
3871 | return -EFAULT; | |
3872 | } | |
3873 | } | |
3874 | ||
c8fecf22 PE |
3875 | *valp = new; |
3876 | addrconf_fixup_forwarding(table, valp, val); | |
1da177e4 LT |
3877 | return 1; |
3878 | } | |
3879 | ||
3880 | static struct addrconf_sysctl_table | |
3881 | { | |
3882 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 3883 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 3884 | char *dev_name; |
ab32ea5d | 3885 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3886 | .sysctl_header = NULL, |
3887 | .addrconf_vars = { | |
1ab1457c | 3888 | { |
1da177e4 LT |
3889 | .ctl_name = NET_IPV6_FORWARDING, |
3890 | .procname = "forwarding", | |
1ab1457c | 3891 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3892 | .maxlen = sizeof(int), |
3893 | .mode = 0644, | |
1ab1457c | 3894 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3895 | .strategy = &addrconf_sysctl_forward_strategy, |
3896 | }, | |
3897 | { | |
3898 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3899 | .procname = "hop_limit", | |
1ab1457c | 3900 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3901 | .maxlen = sizeof(int), |
3902 | .mode = 0644, | |
3903 | .proc_handler = proc_dointvec, | |
3904 | }, | |
3905 | { | |
3906 | .ctl_name = NET_IPV6_MTU, | |
3907 | .procname = "mtu", | |
3908 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3909 | .maxlen = sizeof(int), |
1da177e4 | 3910 | .mode = 0644, |
1ab1457c | 3911 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3912 | }, |
3913 | { | |
3914 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3915 | .procname = "accept_ra", | |
1ab1457c | 3916 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3917 | .maxlen = sizeof(int), |
3918 | .mode = 0644, | |
1ab1457c | 3919 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3920 | }, |
3921 | { | |
3922 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3923 | .procname = "accept_redirects", | |
1ab1457c | 3924 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3925 | .maxlen = sizeof(int), |
3926 | .mode = 0644, | |
1ab1457c | 3927 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3928 | }, |
3929 | { | |
3930 | .ctl_name = NET_IPV6_AUTOCONF, | |
3931 | .procname = "autoconf", | |
1ab1457c | 3932 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3933 | .maxlen = sizeof(int), |
3934 | .mode = 0644, | |
1ab1457c | 3935 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3936 | }, |
3937 | { | |
3938 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3939 | .procname = "dad_transmits", | |
1ab1457c | 3940 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3941 | .maxlen = sizeof(int), |
3942 | .mode = 0644, | |
1ab1457c | 3943 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3944 | }, |
3945 | { | |
3946 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3947 | .procname = "router_solicitations", | |
1ab1457c | 3948 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3949 | .maxlen = sizeof(int), |
3950 | .mode = 0644, | |
1ab1457c | 3951 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3952 | }, |
3953 | { | |
3954 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3955 | .procname = "router_solicitation_interval", | |
1ab1457c | 3956 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3957 | .maxlen = sizeof(int), |
3958 | .mode = 0644, | |
1ab1457c | 3959 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3960 | .strategy = &sysctl_jiffies, |
3961 | }, | |
3962 | { | |
3963 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3964 | .procname = "router_solicitation_delay", | |
1ab1457c | 3965 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3966 | .maxlen = sizeof(int), |
3967 | .mode = 0644, | |
1ab1457c | 3968 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3969 | .strategy = &sysctl_jiffies, |
3970 | }, | |
3971 | { | |
3972 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3973 | .procname = "force_mld_version", | |
1ab1457c | 3974 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3975 | .maxlen = sizeof(int), |
3976 | .mode = 0644, | |
1ab1457c | 3977 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3978 | }, |
3979 | #ifdef CONFIG_IPV6_PRIVACY | |
3980 | { | |
3981 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3982 | .procname = "use_tempaddr", | |
1ab1457c | 3983 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3984 | .maxlen = sizeof(int), |
3985 | .mode = 0644, | |
1ab1457c | 3986 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3987 | }, |
3988 | { | |
3989 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3990 | .procname = "temp_valid_lft", | |
1ab1457c | 3991 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3992 | .maxlen = sizeof(int), |
3993 | .mode = 0644, | |
1ab1457c | 3994 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3995 | }, |
3996 | { | |
3997 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3998 | .procname = "temp_prefered_lft", | |
1ab1457c | 3999 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4000 | .maxlen = sizeof(int), |
4001 | .mode = 0644, | |
1ab1457c | 4002 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4003 | }, |
4004 | { | |
4005 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
4006 | .procname = "regen_max_retry", | |
1ab1457c | 4007 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4008 | .maxlen = sizeof(int), |
4009 | .mode = 0644, | |
1ab1457c | 4010 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4011 | }, |
4012 | { | |
4013 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
4014 | .procname = "max_desync_factor", | |
1ab1457c | 4015 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4016 | .maxlen = sizeof(int), |
4017 | .mode = 0644, | |
1ab1457c | 4018 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4019 | }, |
4020 | #endif | |
4021 | { | |
4022 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
4023 | .procname = "max_addresses", | |
4024 | .data = &ipv6_devconf.max_addresses, | |
4025 | .maxlen = sizeof(int), | |
4026 | .mode = 0644, | |
4027 | .proc_handler = &proc_dointvec, | |
4028 | }, | |
65f5c7c1 YH |
4029 | { |
4030 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
4031 | .procname = "accept_ra_defrtr", | |
1ab1457c | 4032 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4033 | .maxlen = sizeof(int), |
4034 | .mode = 0644, | |
1ab1457c | 4035 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 4036 | }, |
c4fd30eb YH |
4037 | { |
4038 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
4039 | .procname = "accept_ra_pinfo", | |
1ab1457c | 4040 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4041 | .maxlen = sizeof(int), |
4042 | .mode = 0644, | |
1ab1457c | 4043 | .proc_handler = &proc_dointvec, |
c4fd30eb | 4044 | }, |
930d6ff2 YH |
4045 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4046 | { | |
4047 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
4048 | .procname = "accept_ra_rtr_pref", | |
4049 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4050 | .maxlen = sizeof(int), | |
4051 | .mode = 0644, | |
4052 | .proc_handler = &proc_dointvec, | |
4053 | }, | |
52e16356 YH |
4054 | { |
4055 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
4056 | .procname = "router_probe_interval", | |
4057 | .data = &ipv6_devconf.rtr_probe_interval, | |
4058 | .maxlen = sizeof(int), | |
4059 | .mode = 0644, | |
4060 | .proc_handler = &proc_dointvec_jiffies, | |
4061 | .strategy = &sysctl_jiffies, | |
4062 | }, | |
fa03ef38 | 4063 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4064 | { |
4065 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4066 | .procname = "accept_ra_rt_info_max_plen", | |
4067 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4068 | .maxlen = sizeof(int), | |
4069 | .mode = 0644, | |
4070 | .proc_handler = &proc_dointvec, | |
4071 | }, | |
4072 | #endif | |
930d6ff2 | 4073 | #endif |
fbea49e1 YH |
4074 | { |
4075 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4076 | .procname = "proxy_ndp", | |
4077 | .data = &ipv6_devconf.proxy_ndp, | |
4078 | .maxlen = sizeof(int), | |
4079 | .mode = 0644, | |
4080 | .proc_handler = &proc_dointvec, | |
4081 | }, | |
0bcbc926 YH |
4082 | { |
4083 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4084 | .procname = "accept_source_route", | |
4085 | .data = &ipv6_devconf.accept_source_route, | |
4086 | .maxlen = sizeof(int), | |
4087 | .mode = 0644, | |
4088 | .proc_handler = &proc_dointvec, | |
4089 | }, | |
95c385b4 NH |
4090 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4091 | { | |
4092 | .ctl_name = CTL_UNNUMBERED, | |
4093 | .procname = "optimistic_dad", | |
4094 | .data = &ipv6_devconf.optimistic_dad, | |
4095 | .maxlen = sizeof(int), | |
4096 | .mode = 0644, | |
4097 | .proc_handler = &proc_dointvec, | |
4098 | ||
4099 | }, | |
7bc570c8 YH |
4100 | #endif |
4101 | #ifdef CONFIG_IPV6_MROUTE | |
4102 | { | |
4103 | .ctl_name = CTL_UNNUMBERED, | |
4104 | .procname = "mc_forwarding", | |
4105 | .data = &ipv6_devconf.mc_forwarding, | |
4106 | .maxlen = sizeof(int), | |
4107 | .mode = 0644, | |
4108 | .proc_handler = &proc_dointvec, | |
4109 | }, | |
95c385b4 | 4110 | #endif |
1da177e4 LT |
4111 | { |
4112 | .ctl_name = 0, /* sentinel */ | |
4113 | } | |
4114 | }, | |
1da177e4 LT |
4115 | }; |
4116 | ||
bff16c2f PE |
4117 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4118 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4119 | { |
4120 | int i; | |
1da177e4 | 4121 | struct addrconf_sysctl_table *t; |
1da177e4 | 4122 | |
1dab6222 PE |
4123 | #define ADDRCONF_CTL_PATH_DEV 3 |
4124 | ||
4125 | struct ctl_path addrconf_ctl_path[] = { | |
4126 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4127 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4128 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4129 | { /* to be set */ }, | |
4130 | { }, | |
4131 | }; | |
4132 | ||
4133 | ||
af879cc7 | 4134 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4135 | if (t == NULL) |
f68635e6 PE |
4136 | goto out; |
4137 | ||
1da177e4 LT |
4138 | for (i=0; t->addrconf_vars[i].data; i++) { |
4139 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4140 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4141 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4142 | } |
1da177e4 | 4143 | |
1ab1457c YH |
4144 | /* |
4145 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4146 | * by sysctl and we wouldn't want anyone to change it under our feet |
4147 | * (see SIOCSIFNAME). | |
1ab1457c | 4148 | */ |
1dab6222 PE |
4149 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4150 | if (!t->dev_name) | |
f68635e6 | 4151 | goto free; |
1da177e4 | 4152 | |
1dab6222 PE |
4153 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4154 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4155 | |
bff16c2f | 4156 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4157 | t->addrconf_vars); |
1da177e4 LT |
4158 | if (t->sysctl_header == NULL) |
4159 | goto free_procname; | |
f68635e6 PE |
4160 | |
4161 | p->sysctl = t; | |
95897312 | 4162 | return 0; |
1da177e4 | 4163 | |
f68635e6 | 4164 | free_procname: |
1dab6222 | 4165 | kfree(t->dev_name); |
f68635e6 | 4166 | free: |
1da177e4 | 4167 | kfree(t); |
f68635e6 | 4168 | out: |
95897312 | 4169 | return -ENOBUFS; |
1da177e4 LT |
4170 | } |
4171 | ||
408c4768 PE |
4172 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4173 | { | |
4174 | struct addrconf_sysctl_table *t; | |
4175 | ||
4176 | if (p->sysctl == NULL) | |
4177 | return; | |
4178 | ||
4179 | t = p->sysctl; | |
4180 | p->sysctl = NULL; | |
4181 | unregister_sysctl_table(t->sysctl_header); | |
4182 | kfree(t->dev_name); | |
4183 | kfree(t); | |
4184 | } | |
4185 | ||
f52295a9 PE |
4186 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4187 | { | |
408c4768 PE |
4188 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4189 | NET_IPV6_NEIGH, "ipv6", | |
4190 | &ndisc_ifinfo_sysctl_change, | |
4191 | NULL); | |
c346dca1 | 4192 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
bff16c2f | 4193 | idev->dev->ifindex, idev, &idev->cnf); |
f52295a9 PE |
4194 | } |
4195 | ||
408c4768 | 4196 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4197 | { |
408c4768 PE |
4198 | __addrconf_sysctl_unregister(&idev->cnf); |
4199 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4200 | } |
4201 | ||
4202 | ||
4203 | #endif | |
4204 | ||
e0da5a48 PE |
4205 | static int addrconf_init_net(struct net *net) |
4206 | { | |
4207 | int err; | |
4208 | struct ipv6_devconf *all, *dflt; | |
4209 | ||
4210 | err = -ENOMEM; | |
4211 | all = &ipv6_devconf; | |
4212 | dflt = &ipv6_devconf_dflt; | |
4213 | ||
4214 | if (net != &init_net) { | |
4215 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); | |
4216 | if (all == NULL) | |
4217 | goto err_alloc_all; | |
4218 | ||
4219 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4220 | if (dflt == NULL) | |
4221 | goto err_alloc_dflt; | |
4222 | } | |
4223 | ||
4224 | net->ipv6.devconf_all = all; | |
4225 | net->ipv6.devconf_dflt = dflt; | |
4226 | ||
4227 | #ifdef CONFIG_SYSCTL | |
4228 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, | |
4229 | NULL, all); | |
4230 | if (err < 0) | |
4231 | goto err_reg_all; | |
4232 | ||
4233 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, | |
4234 | NULL, dflt); | |
4235 | if (err < 0) | |
4236 | goto err_reg_dflt; | |
4237 | #endif | |
4238 | return 0; | |
4239 | ||
4240 | #ifdef CONFIG_SYSCTL | |
4241 | err_reg_dflt: | |
4242 | __addrconf_sysctl_unregister(all); | |
4243 | err_reg_all: | |
4244 | kfree(dflt); | |
4245 | #endif | |
4246 | err_alloc_dflt: | |
4247 | kfree(all); | |
4248 | err_alloc_all: | |
4249 | return err; | |
4250 | } | |
4251 | ||
4252 | static void addrconf_exit_net(struct net *net) | |
4253 | { | |
4254 | #ifdef CONFIG_SYSCTL | |
4255 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4256 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4257 | #endif | |
4258 | if (net != &init_net) { | |
4259 | kfree(net->ipv6.devconf_dflt); | |
4260 | kfree(net->ipv6.devconf_all); | |
4261 | } | |
4262 | } | |
4263 | ||
4264 | static struct pernet_operations addrconf_ops = { | |
4265 | .init = addrconf_init_net, | |
4266 | .exit = addrconf_exit_net, | |
4267 | }; | |
4268 | ||
1da177e4 LT |
4269 | /* |
4270 | * Device notifier | |
4271 | */ | |
4272 | ||
4273 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4274 | { | |
1ab1457c | 4275 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4276 | } |
4277 | ||
7159039a YH |
4278 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4279 | ||
1da177e4 LT |
4280 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4281 | { | |
1ab1457c | 4282 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4283 | } |
4284 | ||
7159039a YH |
4285 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4286 | ||
af284937 DL |
4287 | |
4288 | static int addrconf_net_init(struct net *net) | |
4289 | { | |
4290 | return 0; | |
4291 | } | |
4292 | ||
4293 | static void addrconf_net_exit(struct net *net) | |
4294 | { | |
6fda7350 BT |
4295 | struct net_device *dev; |
4296 | ||
6fda7350 BT |
4297 | rtnl_lock(); |
4298 | /* clean dev list */ | |
4299 | for_each_netdev(net, dev) { | |
4300 | if (__in6_dev_get(dev) == NULL) | |
4301 | continue; | |
4302 | addrconf_ifdown(dev, 1); | |
4303 | } | |
4304 | addrconf_ifdown(net->loopback_dev, 2); | |
4305 | rtnl_unlock(); | |
af284937 DL |
4306 | } |
4307 | ||
4308 | static struct pernet_operations addrconf_net_ops = { | |
4309 | .init = addrconf_net_init, | |
4310 | .exit = addrconf_net_exit, | |
4311 | }; | |
4312 | ||
1da177e4 LT |
4313 | /* |
4314 | * Init / cleanup code | |
4315 | */ | |
4316 | ||
4317 | int __init addrconf_init(void) | |
4318 | { | |
2a8cc6c8 YH |
4319 | int err; |
4320 | ||
4321 | if ((err = ipv6_addr_label_init()) < 0) { | |
4322 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4323 | err); | |
4324 | return err; | |
4325 | } | |
1da177e4 | 4326 | |
e0da5a48 PE |
4327 | register_pernet_subsys(&addrconf_ops); |
4328 | ||
1da177e4 LT |
4329 | /* The addrconf netdev notifier requires that loopback_dev |
4330 | * has it's ipv6 private information allocated and setup | |
4331 | * before it can bring up and give link-local addresses | |
4332 | * to other devices which are up. | |
4333 | * | |
4334 | * Unfortunately, loopback_dev is not necessarily the first | |
4335 | * entry in the global dev_base list of net devices. In fact, | |
4336 | * it is likely to be the very last entry on that list. | |
4337 | * So this causes the notifier registry below to try and | |
4338 | * give link-local addresses to all devices besides loopback_dev | |
4339 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4340 | * devices to fail to get a link-local address. | |
4341 | * | |
4342 | * So, as a temporary fix, allocate the ipv6 structure for | |
4343 | * loopback_dev first by hand. | |
4344 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4345 | * device and it being up should be removed. | |
4346 | */ | |
4347 | rtnl_lock(); | |
2774c7ab | 4348 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4349 | err = -ENOMEM; |
4350 | rtnl_unlock(); | |
4351 | if (err) | |
e0da5a48 | 4352 | goto errlo; |
1da177e4 | 4353 | |
af284937 DL |
4354 | err = register_pernet_device(&addrconf_net_ops); |
4355 | if (err) | |
4356 | return err; | |
4357 | ||
1da177e4 LT |
4358 | register_netdevice_notifier(&ipv6_dev_notf); |
4359 | ||
1da177e4 | 4360 | addrconf_verify(0); |
c127ea2c TG |
4361 | |
4362 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4363 | if (err < 0) | |
4364 | goto errout; | |
4365 | ||
4366 | /* Only the first call to __rtnl_register can fail */ | |
4367 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4368 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4369 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4370 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4371 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4372 | ||
2a8cc6c8 YH |
4373 | ipv6_addr_label_rtnl_register(); |
4374 | ||
1da177e4 | 4375 | return 0; |
c127ea2c TG |
4376 | errout: |
4377 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4378 | errlo: |
4379 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4380 | |
4381 | return err; | |
1da177e4 LT |
4382 | } |
4383 | ||
09f7709f | 4384 | void addrconf_cleanup(void) |
1da177e4 | 4385 | { |
1ab1457c | 4386 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4387 | int i; |
4388 | ||
4389 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
af284937 | 4390 | unregister_pernet_device(&addrconf_net_ops); |
1da177e4 | 4391 | |
e0da5a48 | 4392 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4393 | |
4394 | rtnl_lock(); | |
4395 | ||
1da177e4 LT |
4396 | /* |
4397 | * Check hash table. | |
4398 | */ | |
1da177e4 LT |
4399 | write_lock_bh(&addrconf_hash_lock); |
4400 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4401 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4402 | struct inet6_ifaddr *bifa; | |
4403 | ||
4404 | bifa = ifa; | |
4405 | ifa = ifa->lst_next; | |
4406 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4407 | /* Do not free it; something is wrong. | |
4408 | Now we can investigate it with debugger. | |
4409 | */ | |
4410 | } | |
4411 | } | |
4412 | write_unlock_bh(&addrconf_hash_lock); | |
4413 | ||
4414 | del_timer(&addr_chk_timer); | |
1da177e4 | 4415 | rtnl_unlock(); |
af284937 DL |
4416 | |
4417 | unregister_pernet_subsys(&addrconf_net_ops); | |
1da177e4 | 4418 | } |