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 LT |
151 | struct prefix_info *pinfo); |
152 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
153 | ||
e041c683 | 154 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 155 | |
ab32ea5d | 156 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
157 | .forwarding = 0, |
158 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
159 | .mtu6 = IPV6_MIN_MTU, | |
160 | .accept_ra = 1, | |
161 | .accept_redirects = 1, | |
162 | .autoconf = 1, | |
163 | .force_mld_version = 0, | |
164 | .dad_transmits = 1, | |
165 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
166 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
167 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
168 | #ifdef CONFIG_IPV6_PRIVACY | |
169 | .use_tempaddr = 0, | |
170 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
171 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
172 | .regen_max_retry = REGEN_MAX_RETRY, | |
173 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
174 | #endif | |
175 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 176 | .accept_ra_defrtr = 1, |
c4fd30eb | 177 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
178 | #ifdef CONFIG_IPV6_ROUTER_PREF |
179 | .accept_ra_rtr_pref = 1, | |
52e16356 | 180 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
181 | #ifdef CONFIG_IPV6_ROUTE_INFO |
182 | .accept_ra_rt_info_max_plen = 0, | |
183 | #endif | |
930d6ff2 | 184 | #endif |
fbea49e1 | 185 | .proxy_ndp = 0, |
0bcbc926 | 186 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
187 | }; |
188 | ||
ab32ea5d | 189 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
190 | .forwarding = 0, |
191 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
192 | .mtu6 = IPV6_MIN_MTU, | |
193 | .accept_ra = 1, | |
194 | .accept_redirects = 1, | |
195 | .autoconf = 1, | |
196 | .dad_transmits = 1, | |
197 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
198 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
199 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
200 | #ifdef CONFIG_IPV6_PRIVACY | |
201 | .use_tempaddr = 0, | |
202 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
203 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
204 | .regen_max_retry = REGEN_MAX_RETRY, | |
205 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
206 | #endif | |
207 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 208 | .accept_ra_defrtr = 1, |
c4fd30eb | 209 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
210 | #ifdef CONFIG_IPV6_ROUTER_PREF |
211 | .accept_ra_rtr_pref = 1, | |
52e16356 | 212 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
213 | #ifdef CONFIG_IPV6_ROUTE_INFO |
214 | .accept_ra_rt_info_max_plen = 0, | |
215 | #endif | |
930d6ff2 | 216 | #endif |
fbea49e1 | 217 | .proxy_ndp = 0, |
0bcbc926 | 218 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
219 | }; |
220 | ||
221 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 222 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 LT |
223 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
224 | ||
f24e3d65 MC |
225 | /* Check if a valid qdisc is available */ |
226 | static inline int addrconf_qdisc_ok(struct net_device *dev) | |
227 | { | |
228 | return (dev->qdisc != &noop_qdisc); | |
229 | } | |
230 | ||
1da177e4 LT |
231 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
232 | { | |
233 | if (del_timer(&ifp->timer)) | |
234 | __in6_ifa_put(ifp); | |
235 | } | |
236 | ||
237 | enum addrconf_timer_t | |
238 | { | |
239 | AC_NONE, | |
240 | AC_DAD, | |
241 | AC_RS, | |
242 | }; | |
243 | ||
244 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
245 | enum addrconf_timer_t what, | |
246 | unsigned long when) | |
247 | { | |
248 | if (!del_timer(&ifp->timer)) | |
249 | in6_ifa_hold(ifp); | |
250 | ||
251 | switch (what) { | |
252 | case AC_DAD: | |
253 | ifp->timer.function = addrconf_dad_timer; | |
254 | break; | |
255 | case AC_RS: | |
256 | ifp->timer.function = addrconf_rs_timer; | |
257 | break; | |
258 | default:; | |
259 | } | |
260 | ifp->timer.expires = jiffies + when; | |
261 | add_timer(&ifp->timer); | |
262 | } | |
263 | ||
7f7d9a6b HX |
264 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
265 | { | |
7f7d9a6b | 266 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 267 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
268 | goto err_ip; |
269 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 270 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 271 | goto err_icmp; |
14878f75 | 272 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 273 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 274 | goto err_icmpmsg; |
7f7d9a6b HX |
275 | |
276 | return 0; | |
277 | ||
14878f75 DS |
278 | err_icmpmsg: |
279 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
280 | err_icmp: |
281 | snmp_mib_free((void **)idev->stats.ipv6); | |
282 | err_ip: | |
aaf70ec7 | 283 | return -ENOMEM; |
7f7d9a6b HX |
284 | } |
285 | ||
16910b98 | 286 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 287 | { |
14878f75 | 288 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
289 | snmp_mib_free((void **)idev->stats.icmpv6); |
290 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
291 | } |
292 | ||
1da177e4 LT |
293 | /* Nobody refers to this device, we may destroy it. */ |
294 | ||
8814c4b5 YH |
295 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
296 | { | |
297 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
298 | kfree(idev); | |
299 | } | |
300 | ||
1da177e4 LT |
301 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
302 | { | |
303 | struct net_device *dev = idev->dev; | |
304 | BUG_TRAP(idev->addr_list==NULL); | |
305 | BUG_TRAP(idev->mc_list==NULL); | |
306 | #ifdef NET_REFCNT_DEBUG | |
307 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
308 | #endif | |
309 | dev_put(dev); | |
310 | if (!idev->dead) { | |
311 | printk("Freeing alive inet6 device %p\n", idev); | |
312 | return; | |
313 | } | |
314 | snmp6_free_dev(idev); | |
8814c4b5 | 315 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
316 | } |
317 | ||
7159039a YH |
318 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
319 | ||
1da177e4 LT |
320 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
321 | { | |
322 | struct inet6_dev *ndev; | |
d88ae4cc | 323 | struct in6_addr maddr; |
1da177e4 LT |
324 | |
325 | ASSERT_RTNL(); | |
326 | ||
327 | if (dev->mtu < IPV6_MIN_MTU) | |
328 | return NULL; | |
329 | ||
1ab1457c | 330 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 331 | |
1ab1457c YH |
332 | if (ndev == NULL) |
333 | return NULL; | |
322f74a4 IO |
334 | |
335 | rwlock_init(&ndev->lock); | |
336 | ndev->dev = dev; | |
337 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
338 | ndev->cnf.mtu6 = dev->mtu; | |
339 | ndev->cnf.sysctl = NULL; | |
340 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
341 | if (ndev->nd_parms == NULL) { | |
342 | kfree(ndev); | |
343 | return NULL; | |
344 | } | |
345 | /* We refer to the device */ | |
346 | dev_hold(dev); | |
1da177e4 | 347 | |
322f74a4 IO |
348 | if (snmp6_alloc_dev(ndev) < 0) { |
349 | ADBG((KERN_WARNING | |
350 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
351 | __FUNCTION__, dev->name)); | |
352 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
353 | ndev->dead = 1; | |
354 | in6_dev_finish_destroy(ndev); | |
355 | return NULL; | |
356 | } | |
1da177e4 | 357 | |
322f74a4 IO |
358 | if (snmp6_register_dev(ndev) < 0) { |
359 | ADBG((KERN_WARNING | |
360 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
361 | __FUNCTION__, dev->name)); | |
362 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
363 | ndev->dead = 1; | |
364 | in6_dev_finish_destroy(ndev); | |
365 | return NULL; | |
366 | } | |
367 | ||
368 | /* One reference from device. We must do this before | |
369 | * we invoke __ipv6_regen_rndid(). | |
370 | */ | |
371 | in6_dev_hold(ndev); | |
1da177e4 LT |
372 | |
373 | #ifdef CONFIG_IPV6_PRIVACY | |
b24b8a24 | 374 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
375 | if ((dev->flags&IFF_LOOPBACK) || |
376 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
377 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
378 | dev->type == ARPHRD_SIT || | |
379 | #endif | |
380 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
381 | printk(KERN_INFO |
382 | "%s: Disabled Privacy Extensions\n", | |
383 | dev->name); | |
384 | ndev->cnf.use_tempaddr = -1; | |
c7dc89c0 FT |
385 | |
386 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
387 | printk(KERN_INFO | |
388 | "%s: Disabled Multicast RS\n", | |
389 | dev->name); | |
390 | ndev->cnf.rtr_solicits = 0; | |
391 | } | |
322f74a4 IO |
392 | } else { |
393 | in6_dev_hold(ndev); | |
394 | ipv6_regen_rndid((unsigned long) ndev); | |
395 | } | |
1da177e4 LT |
396 | #endif |
397 | ||
f24e3d65 | 398 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
399 | ndev->if_flags |= IF_READY; |
400 | ||
322f74a4 IO |
401 | ipv6_mc_init_dev(ndev); |
402 | ndev->tstamp = jiffies; | |
f52295a9 | 403 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
404 | /* protected by rtnl_lock */ |
405 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
406 | |
407 | /* Join all-node multicast group */ | |
408 | ipv6_addr_all_nodes(&maddr); | |
409 | ipv6_dev_mc_inc(dev, &maddr); | |
410 | ||
1da177e4 LT |
411 | return ndev; |
412 | } | |
413 | ||
414 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
415 | { | |
416 | struct inet6_dev *idev; | |
417 | ||
418 | ASSERT_RTNL(); | |
419 | ||
420 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
421 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
422 | return NULL; | |
423 | } | |
c5e33bdd | 424 | |
1da177e4 LT |
425 | if (dev->flags&IFF_UP) |
426 | ipv6_mc_up(idev); | |
427 | return idev; | |
428 | } | |
429 | ||
430 | #ifdef CONFIG_SYSCTL | |
431 | static void dev_forward_change(struct inet6_dev *idev) | |
432 | { | |
433 | struct net_device *dev; | |
434 | struct inet6_ifaddr *ifa; | |
435 | struct in6_addr addr; | |
436 | ||
437 | if (!idev) | |
438 | return; | |
439 | dev = idev->dev; | |
440 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
441 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 442 | |
1da177e4 LT |
443 | if (idev->cnf.forwarding) |
444 | ipv6_dev_mc_inc(dev, &addr); | |
445 | else | |
446 | ipv6_dev_mc_dec(dev, &addr); | |
447 | } | |
448 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
449 | if (ifa->flags&IFA_F_TENTATIVE) |
450 | continue; | |
1da177e4 LT |
451 | if (idev->cnf.forwarding) |
452 | addrconf_join_anycast(ifa); | |
453 | else | |
454 | addrconf_leave_anycast(ifa); | |
455 | } | |
456 | } | |
457 | ||
458 | ||
bff16c2f | 459 | static void addrconf_forward_change(struct net *net) |
1da177e4 LT |
460 | { |
461 | struct net_device *dev; | |
462 | struct inet6_dev *idev; | |
463 | ||
464 | read_lock(&dev_base_lock); | |
bff16c2f | 465 | for_each_netdev(net, dev) { |
8814c4b5 | 466 | rcu_read_lock(); |
1da177e4 LT |
467 | idev = __in6_dev_get(dev); |
468 | if (idev) { | |
469 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
470 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
471 | if (changed) | |
472 | dev_forward_change(idev); | |
473 | } | |
8814c4b5 | 474 | rcu_read_unlock(); |
1da177e4 LT |
475 | } |
476 | read_unlock(&dev_base_lock); | |
477 | } | |
c8fecf22 PE |
478 | |
479 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) | |
480 | { | |
bff16c2f PE |
481 | struct net *net; |
482 | ||
483 | net = (struct net *)table->extra2; | |
c8fecf22 PE |
484 | if (p == &ipv6_devconf_dflt.forwarding) |
485 | return; | |
486 | ||
487 | if (p == &ipv6_devconf.forwarding) { | |
488 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
bff16c2f | 489 | addrconf_forward_change(net); |
c8fecf22 PE |
490 | } else if ((!*p) ^ (!old)) |
491 | dev_forward_change((struct inet6_dev *)table->extra1); | |
492 | ||
493 | if (*p) | |
494 | rt6_purge_dflt_routers(); | |
495 | } | |
1da177e4 LT |
496 | #endif |
497 | ||
498 | /* Nobody refers to this ifaddr, destroy it */ | |
499 | ||
500 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
501 | { | |
502 | BUG_TRAP(ifp->if_next==NULL); | |
503 | BUG_TRAP(ifp->lst_next==NULL); | |
504 | #ifdef NET_REFCNT_DEBUG | |
505 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
506 | #endif | |
507 | ||
508 | in6_dev_put(ifp->idev); | |
509 | ||
510 | if (del_timer(&ifp->timer)) | |
511 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
512 | ||
513 | if (!ifp->dead) { | |
514 | printk("Freeing alive inet6 address %p\n", ifp); | |
515 | return; | |
516 | } | |
517 | dst_release(&ifp->rt->u.dst); | |
518 | ||
519 | kfree(ifp); | |
520 | } | |
521 | ||
e55ffac6 BH |
522 | static void |
523 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
524 | { | |
525 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 526 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
527 | |
528 | /* | |
529 | * Each device address list is sorted in order of scope - | |
530 | * global before linklocal. | |
531 | */ | |
532 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
533 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 534 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
535 | break; |
536 | } | |
537 | ||
538 | ifp->if_next = *ifap; | |
539 | *ifap = ifp; | |
540 | } | |
541 | ||
1da177e4 LT |
542 | /* On success it returns ifp with increased reference count */ |
543 | ||
544 | static struct inet6_ifaddr * | |
545 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 546 | int scope, u32 flags) |
1da177e4 LT |
547 | { |
548 | struct inet6_ifaddr *ifa = NULL; | |
549 | struct rt6_info *rt; | |
550 | int hash; | |
551 | int err = 0; | |
552 | ||
8814c4b5 | 553 | rcu_read_lock_bh(); |
1da177e4 LT |
554 | if (idev->dead) { |
555 | err = -ENODEV; /*XXX*/ | |
556 | goto out2; | |
557 | } | |
558 | ||
559 | write_lock(&addrconf_hash_lock); | |
560 | ||
561 | /* Ignore adding duplicate addresses on an interface */ | |
562 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
563 | ADBG(("ipv6_add_addr: already assigned\n")); | |
564 | err = -EEXIST; | |
565 | goto out; | |
566 | } | |
567 | ||
322f74a4 | 568 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
569 | |
570 | if (ifa == NULL) { | |
571 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
572 | err = -ENOBUFS; | |
573 | goto out; | |
574 | } | |
575 | ||
576 | rt = addrconf_dst_alloc(idev, addr, 0); | |
577 | if (IS_ERR(rt)) { | |
578 | err = PTR_ERR(rt); | |
579 | goto out; | |
580 | } | |
581 | ||
1da177e4 LT |
582 | ipv6_addr_copy(&ifa->addr, addr); |
583 | ||
584 | spin_lock_init(&ifa->lock); | |
585 | init_timer(&ifa->timer); | |
586 | ifa->timer.data = (unsigned long) ifa; | |
587 | ifa->scope = scope; | |
588 | ifa->prefix_len = pfxlen; | |
589 | ifa->flags = flags | IFA_F_TENTATIVE; | |
590 | ifa->cstamp = ifa->tstamp = jiffies; | |
591 | ||
57f5f544 KF |
592 | ifa->rt = rt; |
593 | ||
95c385b4 NH |
594 | /* |
595 | * part one of RFC 4429, section 3.3 | |
596 | * We should not configure an address as | |
597 | * optimistic if we do not yet know the link | |
598 | * layer address of our nexhop router | |
599 | */ | |
600 | ||
601 | if (rt->rt6i_nexthop == NULL) | |
602 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
603 | ||
1da177e4 LT |
604 | ifa->idev = idev; |
605 | in6_dev_hold(idev); | |
606 | /* For caller */ | |
607 | in6_ifa_hold(ifa); | |
608 | ||
609 | /* Add to big hash table */ | |
610 | hash = ipv6_addr_hash(addr); | |
611 | ||
612 | ifa->lst_next = inet6_addr_lst[hash]; | |
613 | inet6_addr_lst[hash] = ifa; | |
614 | in6_ifa_hold(ifa); | |
615 | write_unlock(&addrconf_hash_lock); | |
616 | ||
617 | write_lock(&idev->lock); | |
618 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 619 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
620 | |
621 | #ifdef CONFIG_IPV6_PRIVACY | |
622 | if (ifa->flags&IFA_F_TEMPORARY) { | |
623 | ifa->tmp_next = idev->tempaddr_list; | |
624 | idev->tempaddr_list = ifa; | |
625 | in6_ifa_hold(ifa); | |
626 | } | |
627 | #endif | |
628 | ||
1da177e4 LT |
629 | in6_ifa_hold(ifa); |
630 | write_unlock(&idev->lock); | |
631 | out2: | |
8814c4b5 | 632 | rcu_read_unlock_bh(); |
1da177e4 | 633 | |
fd92833a | 634 | if (likely(err == 0)) |
e041c683 | 635 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
636 | else { |
637 | kfree(ifa); | |
638 | ifa = ERR_PTR(err); | |
639 | } | |
640 | ||
641 | return ifa; | |
642 | out: | |
643 | write_unlock(&addrconf_hash_lock); | |
644 | goto out2; | |
645 | } | |
646 | ||
647 | /* This function wants to get referenced ifp and releases it before return */ | |
648 | ||
649 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
650 | { | |
651 | struct inet6_ifaddr *ifa, **ifap; | |
652 | struct inet6_dev *idev = ifp->idev; | |
653 | int hash; | |
654 | int deleted = 0, onlink = 0; | |
655 | unsigned long expires = jiffies; | |
656 | ||
657 | hash = ipv6_addr_hash(&ifp->addr); | |
658 | ||
659 | ifp->dead = 1; | |
660 | ||
661 | write_lock_bh(&addrconf_hash_lock); | |
662 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
663 | ifap = &ifa->lst_next) { | |
664 | if (ifa == ifp) { | |
665 | *ifap = ifa->lst_next; | |
666 | __in6_ifa_put(ifp); | |
667 | ifa->lst_next = NULL; | |
668 | break; | |
669 | } | |
670 | } | |
671 | write_unlock_bh(&addrconf_hash_lock); | |
672 | ||
673 | write_lock_bh(&idev->lock); | |
674 | #ifdef CONFIG_IPV6_PRIVACY | |
675 | if (ifp->flags&IFA_F_TEMPORARY) { | |
676 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
677 | ifap = &ifa->tmp_next) { | |
678 | if (ifa == ifp) { | |
679 | *ifap = ifa->tmp_next; | |
680 | if (ifp->ifpub) { | |
681 | in6_ifa_put(ifp->ifpub); | |
682 | ifp->ifpub = NULL; | |
683 | } | |
684 | __in6_ifa_put(ifp); | |
685 | ifa->tmp_next = NULL; | |
686 | break; | |
687 | } | |
688 | } | |
689 | } | |
690 | #endif | |
691 | ||
1d142804 | 692 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
693 | if (ifa == ifp) { |
694 | *ifap = ifa->if_next; | |
695 | __in6_ifa_put(ifp); | |
696 | ifa->if_next = NULL; | |
697 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
698 | break; | |
699 | deleted = 1; | |
1d142804 | 700 | continue; |
1da177e4 LT |
701 | } else if (ifp->flags & IFA_F_PERMANENT) { |
702 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
703 | ifp->prefix_len)) { | |
704 | if (ifa->flags & IFA_F_PERMANENT) { | |
705 | onlink = 1; | |
706 | if (deleted) | |
707 | break; | |
708 | } else { | |
709 | unsigned long lifetime; | |
710 | ||
711 | if (!onlink) | |
712 | onlink = -1; | |
713 | ||
714 | spin_lock(&ifa->lock); | |
715 | lifetime = min_t(unsigned long, | |
716 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
717 | if (time_before(expires, | |
718 | ifa->tstamp + lifetime * HZ)) | |
719 | expires = ifa->tstamp + lifetime * HZ; | |
720 | spin_unlock(&ifa->lock); | |
721 | } | |
722 | } | |
723 | } | |
1d142804 | 724 | ifap = &ifa->if_next; |
1da177e4 LT |
725 | } |
726 | write_unlock_bh(&idev->lock); | |
727 | ||
728 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
729 | ||
e041c683 | 730 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
731 | |
732 | addrconf_del_timer(ifp); | |
733 | ||
734 | /* | |
735 | * Purge or update corresponding prefix | |
736 | * | |
737 | * 1) we don't purge prefix here if address was not permanent. | |
738 | * prefix is managed by its own lifetime. | |
739 | * 2) if there're no addresses, delete prefix. | |
740 | * 3) if there're still other permanent address(es), | |
741 | * corresponding prefix is still permanent. | |
742 | * 4) otherwise, update prefix lifetime to the | |
743 | * longest valid lifetime among the corresponding | |
744 | * addresses on the device. | |
745 | * Note: subsequent RA will update lifetime. | |
746 | * | |
747 | * --yoshfuji | |
748 | */ | |
749 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
750 | struct in6_addr prefix; | |
751 | struct rt6_info *rt; | |
752 | ||
753 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
754 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
755 | ||
756 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
757 | if (onlink == 0) { | |
e0a1ad73 | 758 | ip6_del_rt(rt); |
1da177e4 LT |
759 | rt = NULL; |
760 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
761 | rt->rt6i_expires = expires; | |
762 | rt->rt6i_flags |= RTF_EXPIRES; | |
763 | } | |
764 | } | |
765 | dst_release(&rt->u.dst); | |
766 | } | |
767 | ||
768 | in6_ifa_put(ifp); | |
769 | } | |
770 | ||
771 | #ifdef CONFIG_IPV6_PRIVACY | |
772 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
773 | { | |
774 | struct inet6_dev *idev = ifp->idev; | |
775 | struct in6_addr addr, *tmpaddr; | |
776 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
777 | int tmp_plen; | |
778 | int ret = 0; | |
779 | int max_addresses; | |
95c385b4 | 780 | u32 addr_flags; |
1da177e4 LT |
781 | |
782 | write_lock(&idev->lock); | |
783 | if (ift) { | |
784 | spin_lock_bh(&ift->lock); | |
785 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
786 | spin_unlock_bh(&ift->lock); | |
787 | tmpaddr = &addr; | |
788 | } else { | |
789 | tmpaddr = NULL; | |
790 | } | |
791 | retry: | |
792 | in6_dev_hold(idev); | |
793 | if (idev->cnf.use_tempaddr <= 0) { | |
794 | write_unlock(&idev->lock); | |
795 | printk(KERN_INFO | |
796 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
797 | in6_dev_put(idev); | |
798 | ret = -1; | |
799 | goto out; | |
800 | } | |
801 | spin_lock_bh(&ifp->lock); | |
802 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
803 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
804 | spin_unlock_bh(&ifp->lock); | |
805 | write_unlock(&idev->lock); | |
806 | printk(KERN_WARNING | |
807 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
808 | in6_dev_put(idev); | |
809 | ret = -1; | |
810 | goto out; | |
811 | } | |
812 | in6_ifa_hold(ifp); | |
813 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
814 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
815 | spin_unlock_bh(&ifp->lock); | |
816 | write_unlock(&idev->lock); | |
817 | printk(KERN_WARNING | |
818 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
819 | in6_ifa_put(ifp); | |
820 | in6_dev_put(idev); | |
821 | ret = -1; | |
822 | goto out; | |
823 | } | |
824 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
825 | tmp_valid_lft = min_t(__u32, | |
826 | ifp->valid_lft, | |
827 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
828 | tmp_prefered_lft = min_t(__u32, |
829 | ifp->prefered_lft, | |
1da177e4 LT |
830 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
831 | tmp_plen = ifp->prefix_len; | |
832 | max_addresses = idev->cnf.max_addresses; | |
833 | tmp_cstamp = ifp->cstamp; | |
834 | tmp_tstamp = ifp->tstamp; | |
835 | spin_unlock_bh(&ifp->lock); | |
836 | ||
837 | write_unlock(&idev->lock); | |
95c385b4 NH |
838 | |
839 | addr_flags = IFA_F_TEMPORARY; | |
840 | /* set in addrconf_prefix_rcv() */ | |
841 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
842 | addr_flags |= IFA_F_OPTIMISTIC; | |
843 | ||
1da177e4 | 844 | ift = !max_addresses || |
1ab1457c | 845 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 846 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
847 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
848 | addr_flags) : NULL; | |
1da177e4 LT |
849 | if (!ift || IS_ERR(ift)) { |
850 | in6_ifa_put(ifp); | |
851 | in6_dev_put(idev); | |
852 | printk(KERN_INFO | |
853 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
854 | tmpaddr = &addr; | |
855 | write_lock(&idev->lock); | |
856 | goto retry; | |
857 | } | |
858 | ||
859 | spin_lock_bh(&ift->lock); | |
860 | ift->ifpub = ifp; | |
861 | ift->valid_lft = tmp_valid_lft; | |
862 | ift->prefered_lft = tmp_prefered_lft; | |
863 | ift->cstamp = tmp_cstamp; | |
864 | ift->tstamp = tmp_tstamp; | |
865 | spin_unlock_bh(&ift->lock); | |
866 | ||
867 | addrconf_dad_start(ift, 0); | |
868 | in6_ifa_put(ift); | |
869 | in6_dev_put(idev); | |
870 | out: | |
871 | return ret; | |
872 | } | |
873 | #endif | |
874 | ||
875 | /* | |
072047e4 | 876 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 877 | */ |
072047e4 YH |
878 | struct ipv6_saddr_score { |
879 | int addr_type; | |
880 | unsigned int attrs; | |
881 | int matchlen; | |
0d27b427 | 882 | int scope; |
072047e4 YH |
883 | unsigned int rule; |
884 | }; | |
885 | ||
886 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
887 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
888 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
889 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
890 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
891 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
892 | ||
b6f99a21 | 893 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 894 | { |
072047e4 YH |
895 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
896 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
897 | return 1; | |
898 | return 0; | |
1da177e4 LT |
899 | } |
900 | ||
072047e4 | 901 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
902 | struct in6_addr *daddr, struct in6_addr *saddr) |
903 | { | |
072047e4 YH |
904 | struct ipv6_saddr_score hiscore; |
905 | struct inet6_ifaddr *ifa_result = NULL; | |
906 | int daddr_type = __ipv6_addr_type(daddr); | |
907 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
303065a8 YH |
908 | int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0; |
909 | u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex); | |
072047e4 | 910 | struct net_device *dev; |
1da177e4 | 911 | |
072047e4 | 912 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 913 | |
072047e4 | 914 | read_lock(&dev_base_lock); |
8814c4b5 | 915 | rcu_read_lock(); |
1da177e4 | 916 | |
881d966b | 917 | for_each_netdev(&init_net, dev) { |
072047e4 YH |
918 | struct inet6_dev *idev; |
919 | struct inet6_ifaddr *ifa; | |
920 | ||
921 | /* Rule 0: Candidate Source Address (section 4) | |
922 | * - multicast and link-local destination address, | |
923 | * the set of candidate source address MUST only | |
924 | * include addresses assigned to interfaces | |
925 | * belonging to the same link as the outgoing | |
926 | * interface. | |
927 | * (- For site-local destination addresses, the | |
928 | * set of candidate source addresses MUST only | |
929 | * include addresses assigned to interfaces | |
930 | * belonging to the same site as the outgoing | |
931 | * interface.) | |
932 | */ | |
933 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
934 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
935 | daddr_dev && dev != daddr_dev) | |
936 | continue; | |
1da177e4 | 937 | |
1da177e4 | 938 | idev = __in6_dev_get(dev); |
072047e4 YH |
939 | if (!idev) |
940 | continue; | |
941 | ||
942 | read_lock_bh(&idev->lock); | |
943 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
944 | struct ipv6_saddr_score score; | |
945 | ||
946 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
947 | ||
6b3ae80a YH |
948 | /* Rule 0: |
949 | * - Tentative Address (RFC2462 section 5.4) | |
950 | * - A tentative address is not considered | |
951 | * "assigned to an interface" in the traditional | |
95c385b4 | 952 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 953 | * - Candidate Source Address (section 4) |
072047e4 YH |
954 | * - In any case, anycast addresses, multicast |
955 | * addresses, and the unspecified address MUST | |
956 | * NOT be included in a candidate set. | |
957 | */ | |
95c385b4 NH |
958 | if ((ifa->flags & IFA_F_TENTATIVE) && |
959 | (!(ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 960 | continue; |
072047e4 YH |
961 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
962 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
963 | LIMIT_NETDEBUG(KERN_DEBUG | |
3b6d821c | 964 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
965 | "assigned as unicast address on %s", |
966 | dev->name); | |
967 | continue; | |
968 | } | |
969 | ||
970 | score.attrs = 0; | |
971 | score.matchlen = 0; | |
972 | score.scope = 0; | |
973 | score.rule = 0; | |
974 | ||
975 | if (ifa_result == NULL) { | |
976 | /* record it if the first available entry */ | |
977 | goto record_it; | |
978 | } | |
979 | ||
980 | /* Rule 1: Prefer same address */ | |
981 | if (hiscore.rule < 1) { | |
982 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
983 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
984 | hiscore.rule++; | |
985 | } | |
986 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
987 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
988 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
989 | score.rule = 1; | |
990 | goto record_it; | |
1da177e4 | 991 | } |
072047e4 YH |
992 | } else { |
993 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
994 | continue; | |
1da177e4 | 995 | } |
1da177e4 | 996 | |
072047e4 YH |
997 | /* Rule 2: Prefer appropriate scope */ |
998 | if (hiscore.rule < 2) { | |
999 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
1000 | hiscore.rule++; | |
1001 | } | |
1002 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1003 | if (hiscore.scope < score.scope) { | |
1004 | if (hiscore.scope < daddr_scope) { | |
1005 | score.rule = 2; | |
1006 | goto record_it; | |
1007 | } else | |
1008 | continue; | |
1009 | } else if (score.scope < hiscore.scope) { | |
1010 | if (score.scope < daddr_scope) | |
e55ffac6 | 1011 | break; /* addresses sorted by scope */ |
072047e4 YH |
1012 | else { |
1013 | score.rule = 2; | |
1014 | goto record_it; | |
1015 | } | |
1016 | } | |
1da177e4 | 1017 | |
95c385b4 | 1018 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
072047e4 YH |
1019 | if (hiscore.rule < 3) { |
1020 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
95c385b4 NH |
1021 | (((ifa_result->flags & |
1022 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) | |
072047e4 YH |
1023 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1024 | hiscore.rule++; | |
1025 | } | |
1026 | if (ipv6_saddr_preferred(score.addr_type) || | |
6ae5f983 | 1027 | (((ifa->flags & |
95c385b4 | 1028 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { |
072047e4 YH |
1029 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
1030 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1031 | score.rule = 3; | |
1032 | goto record_it; | |
1033 | } | |
1034 | } else { | |
1035 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1036 | continue; | |
1037 | } | |
1da177e4 | 1038 | |
3b9f9a1c | 1039 | /* Rule 4: Prefer home address */ |
59fbb3a6 | 1040 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
1041 | if (hiscore.rule < 4) { |
1042 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1043 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1044 | hiscore.rule++; | |
1045 | } | |
1046 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1047 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1048 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1049 | score.rule = 4; | |
1050 | goto record_it; | |
1051 | } | |
1052 | } else { | |
1053 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1054 | continue; | |
1055 | } | |
1056 | #else | |
220bbd74 YH |
1057 | if (hiscore.rule < 4) |
1058 | hiscore.rule++; | |
3b9f9a1c | 1059 | #endif |
072047e4 YH |
1060 | |
1061 | /* Rule 5: Prefer outgoing interface */ | |
1062 | if (hiscore.rule < 5) { | |
1063 | if (daddr_dev == NULL || | |
1064 | daddr_dev == ifa_result->idev->dev) | |
1065 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1066 | hiscore.rule++; | |
1067 | } | |
1068 | if (daddr_dev == NULL || | |
1069 | daddr_dev == ifa->idev->dev) { | |
1070 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1071 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1072 | score.rule = 5; | |
1073 | goto record_it; | |
1074 | } | |
1075 | } else { | |
1076 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1077 | continue; | |
1078 | } | |
1079 | ||
1080 | /* Rule 6: Prefer matching label */ | |
1081 | if (hiscore.rule < 6) { | |
c1ee656c | 1082 | if (ipv6_addr_label(&ifa_result->addr, |
303065a8 YH |
1083 | hiscore.addr_type, |
1084 | ifa_result->idev->dev->ifindex) == daddr_label) | |
072047e4 YH |
1085 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; |
1086 | hiscore.rule++; | |
1087 | } | |
c1ee656c | 1088 | if (ipv6_addr_label(&ifa->addr, |
303065a8 YH |
1089 | score.addr_type, |
1090 | ifa->idev->dev->ifindex) == daddr_label) { | |
072047e4 YH |
1091 | score.attrs |= IPV6_SADDR_SCORE_LABEL; |
1092 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1093 | score.rule = 6; | |
1094 | goto record_it; | |
1da177e4 | 1095 | } |
072047e4 YH |
1096 | } else { |
1097 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1098 | continue; | |
1099 | } | |
1100 | ||
44fd0261 | 1101 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1102 | /* Rule 7: Prefer public address |
1103 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1104 | */ | |
1105 | if (hiscore.rule < 7) { | |
1106 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1107 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1108 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1109 | hiscore.rule++; | |
1110 | } | |
1111 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1112 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1113 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1114 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1115 | score.rule = 7; | |
1116 | goto record_it; | |
1117 | } | |
1118 | } else { | |
1119 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1120 | continue; | |
1121 | } | |
5e2707fa YH |
1122 | #else |
1123 | if (hiscore.rule < 7) | |
1124 | hiscore.rule++; | |
44fd0261 | 1125 | #endif |
072047e4 | 1126 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1127 | if (hiscore.rule < 8) { |
072047e4 | 1128 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1129 | hiscore.rule++; |
1130 | } | |
072047e4 YH |
1131 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1132 | if (score.matchlen > hiscore.matchlen) { | |
1133 | score.rule = 8; | |
1134 | goto record_it; | |
1da177e4 | 1135 | } |
072047e4 YH |
1136 | #if 0 |
1137 | else if (score.matchlen < hiscore.matchlen) | |
1138 | continue; | |
1139 | #endif | |
1140 | ||
1141 | /* Final Rule: choose first available one */ | |
1142 | continue; | |
1143 | record_it: | |
1144 | if (ifa_result) | |
1145 | in6_ifa_put(ifa_result); | |
1146 | in6_ifa_hold(ifa); | |
1147 | ifa_result = ifa; | |
1148 | hiscore = score; | |
1da177e4 | 1149 | } |
072047e4 | 1150 | read_unlock_bh(&idev->lock); |
1da177e4 | 1151 | } |
8814c4b5 | 1152 | rcu_read_unlock(); |
1da177e4 LT |
1153 | read_unlock(&dev_base_lock); |
1154 | ||
072047e4 YH |
1155 | if (!ifa_result) |
1156 | return -EADDRNOTAVAIL; | |
1ab1457c | 1157 | |
072047e4 YH |
1158 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1159 | in6_ifa_put(ifa_result); | |
1160 | return 0; | |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | ||
1164 | int ipv6_get_saddr(struct dst_entry *dst, | |
1165 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1166 | { | |
7a3025b1 | 1167 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1168 | } |
1169 | ||
7159039a | 1170 | EXPORT_SYMBOL(ipv6_get_saddr); |
1da177e4 | 1171 | |
95c385b4 NH |
1172 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1173 | unsigned char banned_flags) | |
1da177e4 LT |
1174 | { |
1175 | struct inet6_dev *idev; | |
1176 | int err = -EADDRNOTAVAIL; | |
1177 | ||
8814c4b5 | 1178 | rcu_read_lock(); |
1da177e4 LT |
1179 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1180 | struct inet6_ifaddr *ifp; | |
1181 | ||
1182 | read_lock_bh(&idev->lock); | |
1183 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1184 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1185 | ipv6_addr_copy(addr, &ifp->addr); |
1186 | err = 0; | |
1187 | break; | |
1188 | } | |
1189 | } | |
1190 | read_unlock_bh(&idev->lock); | |
1191 | } | |
8814c4b5 | 1192 | rcu_read_unlock(); |
1da177e4 LT |
1193 | return err; |
1194 | } | |
1195 | ||
1196 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1197 | { | |
1198 | int cnt = 0; | |
1199 | struct inet6_ifaddr *ifp; | |
1200 | ||
1201 | read_lock_bh(&idev->lock); | |
1202 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1203 | cnt++; | |
1204 | read_unlock_bh(&idev->lock); | |
1205 | return cnt; | |
1206 | } | |
1207 | ||
1208 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1209 | { | |
1210 | struct inet6_ifaddr * ifp; | |
1211 | u8 hash = ipv6_addr_hash(addr); | |
1212 | ||
1213 | read_lock_bh(&addrconf_hash_lock); | |
1214 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1215 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1216 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1217 | if (dev == NULL || ifp->idev->dev == dev || | |
1218 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1219 | break; | |
1220 | } | |
1221 | } | |
1222 | read_unlock_bh(&addrconf_hash_lock); | |
1223 | return ifp != NULL; | |
1224 | } | |
1225 | ||
7159039a YH |
1226 | EXPORT_SYMBOL(ipv6_chk_addr); |
1227 | ||
1da177e4 LT |
1228 | static |
1229 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1230 | { | |
1231 | struct inet6_ifaddr * ifp; | |
1232 | u8 hash = ipv6_addr_hash(addr); | |
1233 | ||
1234 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1235 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1236 | if (dev == NULL || ifp->idev->dev == dev) | |
1237 | break; | |
1238 | } | |
1239 | } | |
1240 | return ifp != NULL; | |
1241 | } | |
1242 | ||
1243 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1244 | { | |
1245 | struct inet6_ifaddr * ifp; | |
1246 | u8 hash = ipv6_addr_hash(addr); | |
1247 | ||
1248 | read_lock_bh(&addrconf_hash_lock); | |
1249 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1250 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1251 | if (dev == NULL || ifp->idev->dev == dev || | |
1252 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1253 | in6_ifa_hold(ifp); | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | read_unlock_bh(&addrconf_hash_lock); | |
1259 | ||
1260 | return ifp; | |
1261 | } | |
1262 | ||
1263 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1264 | { | |
1265 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1266 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1267 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1268 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1269 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1270 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1271 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1272 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1273 | ||
1274 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1275 | return 1; | |
1276 | ||
1277 | if (addr_type2 == IPV6_ADDR_ANY && | |
1278 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1279 | return 1; | |
1280 | ||
1281 | if (addr_type == IPV6_ADDR_ANY && | |
1282 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1283 | return 1; | |
1284 | ||
1285 | if (sk2_rcv_saddr6 && | |
1286 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1287 | return 1; | |
1288 | ||
1289 | if (addr_type == IPV6_ADDR_MAPPED && | |
1290 | !sk2_ipv6only && | |
1291 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1292 | return 1; | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | /* Gets referenced address, destroys ifaddr */ | |
1298 | ||
9f5336e2 | 1299 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1300 | { |
1da177e4 LT |
1301 | if (ifp->flags&IFA_F_PERMANENT) { |
1302 | spin_lock_bh(&ifp->lock); | |
1303 | addrconf_del_timer(ifp); | |
1304 | ifp->flags |= IFA_F_TENTATIVE; | |
1305 | spin_unlock_bh(&ifp->lock); | |
1306 | in6_ifa_put(ifp); | |
1307 | #ifdef CONFIG_IPV6_PRIVACY | |
1308 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1309 | struct inet6_ifaddr *ifpub; | |
1310 | spin_lock_bh(&ifp->lock); | |
1311 | ifpub = ifp->ifpub; | |
1312 | if (ifpub) { | |
1313 | in6_ifa_hold(ifpub); | |
1314 | spin_unlock_bh(&ifp->lock); | |
1315 | ipv6_create_tempaddr(ifpub, ifp); | |
1316 | in6_ifa_put(ifpub); | |
1317 | } else { | |
1318 | spin_unlock_bh(&ifp->lock); | |
1319 | } | |
1320 | ipv6_del_addr(ifp); | |
1321 | #endif | |
1322 | } else | |
1323 | ipv6_del_addr(ifp); | |
1324 | } | |
1325 | ||
3c21edbd YH |
1326 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1327 | { | |
1328 | if (net_ratelimit()) | |
1329 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1330 | addrconf_dad_stop(ifp); | |
1331 | } | |
1da177e4 LT |
1332 | |
1333 | /* Join to solicited addr multicast group. */ | |
1334 | ||
1335 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1336 | { | |
1337 | struct in6_addr maddr; | |
1338 | ||
1339 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1340 | return; | |
1341 | ||
1342 | addrconf_addr_solict_mult(addr, &maddr); | |
1343 | ipv6_dev_mc_inc(dev, &maddr); | |
1344 | } | |
1345 | ||
1346 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1347 | { | |
1348 | struct in6_addr maddr; | |
1349 | ||
1350 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1351 | return; | |
1352 | ||
1353 | addrconf_addr_solict_mult(addr, &maddr); | |
1354 | __ipv6_dev_mc_dec(idev, &maddr); | |
1355 | } | |
1356 | ||
20380731 | 1357 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1358 | { |
1359 | struct in6_addr addr; | |
1360 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1361 | if (ipv6_addr_any(&addr)) | |
1362 | return; | |
1363 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1364 | } | |
1365 | ||
20380731 | 1366 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1367 | { |
1368 | struct in6_addr addr; | |
1369 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1370 | if (ipv6_addr_any(&addr)) | |
1371 | return; | |
1372 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1373 | } | |
1374 | ||
073a8e0e YH |
1375 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1376 | { | |
1377 | if (dev->addr_len != ETH_ALEN) | |
1378 | return -1; | |
1379 | memcpy(eui, dev->dev_addr, 3); | |
1380 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1381 | ||
1382 | /* | |
1383 | * The zSeries OSA network cards can be shared among various | |
1384 | * OS instances, but the OSA cards have only one MAC address. | |
1385 | * This leads to duplicate address conflicts in conjunction | |
1386 | * with IPv6 if more than one instance uses the same card. | |
1387 | * | |
1388 | * The driver for these cards can deliver a unique 16-bit | |
1389 | * identifier for each instance sharing the same card. It is | |
1390 | * placed instead of 0xFFFE in the interface identifier. The | |
1391 | * "u" bit of the interface identifier is not inverted in this | |
1392 | * case. Hence the resulting interface identifier has local | |
1393 | * scope according to RFC2373. | |
1394 | */ | |
1395 | if (dev->dev_id) { | |
1396 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1397 | eui[4] = dev->dev_id & 0xFF; | |
1398 | } else { | |
1399 | eui[3] = 0xFF; | |
1400 | eui[4] = 0xFE; | |
1401 | eui[0] ^= 2; | |
1402 | } | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1407 | { | |
1408 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1409 | if (dev->addr_len != ARCNET_ALEN) | |
1410 | return -1; | |
1411 | memset(eui, 0, 7); | |
1412 | eui[7] = *(u8*)dev->dev_addr; | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1417 | { | |
1418 | if (dev->addr_len != INFINIBAND_ALEN) | |
1419 | return -1; | |
1420 | memcpy(eui, dev->dev_addr + 12, 8); | |
1421 | eui[0] |= 2; | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1da177e4 LT |
1425 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1426 | { | |
1427 | switch (dev->type) { | |
1428 | case ARPHRD_ETHER: | |
1429 | case ARPHRD_FDDI: | |
1430 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1431 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1432 | case ARPHRD_ARCNET: |
073a8e0e | 1433 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1434 | case ARPHRD_INFINIBAND: |
073a8e0e | 1435 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 FT |
1436 | case ARPHRD_SIT: |
1437 | if (dev->priv_flags & IFF_ISATAP) | |
1438 | return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr); | |
1da177e4 LT |
1439 | } |
1440 | return -1; | |
1441 | } | |
1442 | ||
1443 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1444 | { | |
1445 | int err = -1; | |
1446 | struct inet6_ifaddr *ifp; | |
1447 | ||
1448 | read_lock_bh(&idev->lock); | |
1449 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1450 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1451 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1452 | err = 0; | |
1453 | break; | |
1454 | } | |
1455 | } | |
1456 | read_unlock_bh(&idev->lock); | |
1457 | return err; | |
1458 | } | |
1459 | ||
1460 | #ifdef CONFIG_IPV6_PRIVACY | |
1461 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1462 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1463 | { | |
1da177e4 | 1464 | regen: |
955189ef | 1465 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1466 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1467 | |
1468 | /* | |
1469 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1470 | * check if generated address is not inappropriate | |
1471 | * | |
1472 | * - Reserved subnet anycast (RFC 2526) | |
1473 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1474 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1475 | * 00-00-5E-FE-xx-xx-xx-xx |
1476 | * - value 0 | |
1477 | * - XXX: already assigned to an address on the device | |
1478 | */ | |
1ab1457c | 1479 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1480 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1481 | (idev->rndid[7]&0x80)) | |
1482 | goto regen; | |
1483 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1484 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1485 | goto regen; | |
1486 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1487 | goto regen; | |
1488 | } | |
1489 | ||
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static void ipv6_regen_rndid(unsigned long data) | |
1494 | { | |
1495 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1496 | unsigned long expires; | |
1497 | ||
8814c4b5 | 1498 | rcu_read_lock_bh(); |
1da177e4 LT |
1499 | write_lock_bh(&idev->lock); |
1500 | ||
1501 | if (idev->dead) | |
1502 | goto out; | |
1503 | ||
1504 | if (__ipv6_regen_rndid(idev) < 0) | |
1505 | goto out; | |
1ab1457c | 1506 | |
1da177e4 | 1507 | expires = jiffies + |
1ab1457c | 1508 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1509 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1510 | if (time_before(expires, jiffies)) { | |
1511 | printk(KERN_WARNING | |
1512 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1513 | idev->dev->name); | |
1514 | goto out; | |
1515 | } | |
1516 | ||
1517 | if (!mod_timer(&idev->regen_timer, expires)) | |
1518 | in6_dev_hold(idev); | |
1519 | ||
1520 | out: | |
1521 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1522 | rcu_read_unlock_bh(); |
1da177e4 LT |
1523 | in6_dev_put(idev); |
1524 | } | |
1525 | ||
1526 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1527 | int ret = 0; | |
1528 | ||
1529 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1530 | ret = __ipv6_regen_rndid(idev); | |
1531 | return ret; | |
1532 | } | |
1533 | #endif | |
1534 | ||
1535 | /* | |
1536 | * Add prefix route. | |
1537 | */ | |
1538 | ||
1539 | static void | |
1540 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1541 | unsigned long expires, u32 flags) |
1da177e4 | 1542 | { |
86872cb5 TG |
1543 | struct fib6_config cfg = { |
1544 | .fc_table = RT6_TABLE_PREFIX, | |
1545 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1546 | .fc_ifindex = dev->ifindex, | |
1547 | .fc_expires = expires, | |
1548 | .fc_dst_len = plen, | |
1549 | .fc_flags = RTF_UP | flags, | |
1550 | }; | |
1da177e4 | 1551 | |
86872cb5 | 1552 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1553 | |
1554 | /* Prevent useless cloning on PtP SIT. | |
1555 | This thing is done here expecting that the whole | |
1556 | class of non-broadcast devices need not cloning. | |
1557 | */ | |
0be669bb | 1558 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1559 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1560 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1561 | #endif |
1da177e4 | 1562 | |
86872cb5 | 1563 | ip6_route_add(&cfg); |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | /* Create "default" multicast route to the interface */ | |
1567 | ||
1568 | static void addrconf_add_mroute(struct net_device *dev) | |
1569 | { | |
86872cb5 TG |
1570 | struct fib6_config cfg = { |
1571 | .fc_table = RT6_TABLE_LOCAL, | |
1572 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1573 | .fc_ifindex = dev->ifindex, | |
1574 | .fc_dst_len = 8, | |
1575 | .fc_flags = RTF_UP, | |
1576 | }; | |
1577 | ||
1578 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1579 | ||
1580 | ip6_route_add(&cfg); | |
1da177e4 LT |
1581 | } |
1582 | ||
0be669bb | 1583 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1584 | static void sit_route_add(struct net_device *dev) |
1585 | { | |
86872cb5 TG |
1586 | struct fib6_config cfg = { |
1587 | .fc_table = RT6_TABLE_MAIN, | |
1588 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1589 | .fc_ifindex = dev->ifindex, | |
1590 | .fc_dst_len = 96, | |
1591 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1592 | }; | |
1da177e4 LT |
1593 | |
1594 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1595 | ip6_route_add(&cfg); |
1da177e4 | 1596 | } |
0be669bb | 1597 | #endif |
1da177e4 LT |
1598 | |
1599 | static void addrconf_add_lroute(struct net_device *dev) | |
1600 | { | |
1601 | struct in6_addr addr; | |
1602 | ||
1603 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1604 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1605 | } | |
1606 | ||
1607 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1608 | { | |
1609 | struct inet6_dev *idev; | |
1610 | ||
1611 | ASSERT_RTNL(); | |
1612 | ||
1613 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1614 | return NULL; | |
1615 | ||
1616 | /* Add default multicast route */ | |
1617 | addrconf_add_mroute(dev); | |
1618 | ||
1619 | /* Add link local route */ | |
1620 | addrconf_add_lroute(dev); | |
1621 | return idev; | |
1622 | } | |
1623 | ||
1624 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1625 | { | |
1626 | struct prefix_info *pinfo; | |
1627 | __u32 valid_lft; | |
1628 | __u32 prefered_lft; | |
1629 | int addr_type; | |
1630 | unsigned long rt_expires; | |
1631 | struct inet6_dev *in6_dev; | |
1632 | ||
1633 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1634 | |
1da177e4 LT |
1635 | if (len < sizeof(struct prefix_info)) { |
1636 | ADBG(("addrconf: prefix option too short\n")); | |
1637 | return; | |
1638 | } | |
1ab1457c | 1639 | |
1da177e4 LT |
1640 | /* |
1641 | * Validation checks ([ADDRCONF], page 19) | |
1642 | */ | |
1643 | ||
1644 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1645 | ||
1646 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1647 | return; | |
1648 | ||
1649 | valid_lft = ntohl(pinfo->valid); | |
1650 | prefered_lft = ntohl(pinfo->prefered); | |
1651 | ||
1652 | if (prefered_lft > valid_lft) { | |
1653 | if (net_ratelimit()) | |
1654 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1655 | return; | |
1656 | } | |
1657 | ||
1658 | in6_dev = in6_dev_get(dev); | |
1659 | ||
1660 | if (in6_dev == NULL) { | |
1661 | if (net_ratelimit()) | |
1662 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1663 | return; | |
1664 | } | |
1665 | ||
1666 | /* | |
1667 | * Two things going on here: | |
1668 | * 1) Add routes for on-link prefixes | |
1669 | * 2) Configure prefixes with the auto flag set | |
1670 | */ | |
1671 | ||
1672 | /* Avoid arithmetic overflow. Really, we could | |
1673 | save rt_expires in seconds, likely valid_lft, | |
1674 | but it would require division in fib gc, that it | |
1675 | not good. | |
1676 | */ | |
1677 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1678 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1679 | else |
3dd4bc68 YH |
1680 | rt_expires = valid_lft * HZ; |
1681 | ||
1682 | /* | |
1683 | * We convert this (in jiffies) to clock_t later. | |
1684 | * Avoid arithmetic overflow there as well. | |
1685 | * Overflow can happen only if HZ < USER_HZ. | |
1686 | */ | |
1687 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1688 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1689 | |
1690 | if (pinfo->onlink) { | |
1691 | struct rt6_info *rt; | |
1692 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1693 | ||
1694 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1695 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1696 | if (valid_lft == 0) { | |
e0a1ad73 | 1697 | ip6_del_rt(rt); |
1da177e4 LT |
1698 | rt = NULL; |
1699 | } else { | |
3dd4bc68 | 1700 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1701 | } |
1702 | } | |
1703 | } else if (valid_lft) { | |
1704 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1705 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1706 | } |
1707 | if (rt) | |
1708 | dst_release(&rt->u.dst); | |
1709 | } | |
1710 | ||
1711 | /* Try to figure out our local address for this prefix */ | |
1712 | ||
1713 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1714 | struct inet6_ifaddr * ifp; | |
1715 | struct in6_addr addr; | |
1716 | int create = 0, update_lft = 0; | |
1717 | ||
1718 | if (pinfo->prefix_len == 64) { | |
1719 | memcpy(&addr, &pinfo->prefix, 8); | |
1720 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1721 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1722 | in6_dev_put(in6_dev); | |
1723 | return; | |
1724 | } | |
1725 | goto ok; | |
1726 | } | |
1727 | if (net_ratelimit()) | |
1728 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1729 | pinfo->prefix_len); | |
1730 | in6_dev_put(in6_dev); | |
1731 | return; | |
1732 | ||
1733 | ok: | |
1734 | ||
1735 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1736 | ||
1737 | if (ifp == NULL && valid_lft) { | |
1738 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1739 | u32 addr_flags = 0; |
1740 | ||
1741 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1742 | if (in6_dev->cnf.optimistic_dad && | |
1743 | !ipv6_devconf.forwarding) | |
1744 | addr_flags = IFA_F_OPTIMISTIC; | |
1745 | #endif | |
1da177e4 LT |
1746 | |
1747 | /* Do not allow to create too much of autoconfigured | |
1748 | * addresses; this would be too easy way to crash kernel. | |
1749 | */ | |
1750 | if (!max_addresses || | |
1751 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1752 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1753 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1754 | addr_flags); | |
1da177e4 LT |
1755 | |
1756 | if (!ifp || IS_ERR(ifp)) { | |
1757 | in6_dev_put(in6_dev); | |
1758 | return; | |
1759 | } | |
1760 | ||
1761 | update_lft = create = 1; | |
1762 | ifp->cstamp = jiffies; | |
1763 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1764 | } | |
1765 | ||
1766 | if (ifp) { | |
1767 | int flags; | |
1768 | unsigned long now; | |
1769 | #ifdef CONFIG_IPV6_PRIVACY | |
1770 | struct inet6_ifaddr *ift; | |
1771 | #endif | |
1772 | u32 stored_lft; | |
1773 | ||
1774 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1775 | spin_lock(&ifp->lock); | |
1776 | now = jiffies; | |
1777 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1778 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1779 | else | |
1780 | stored_lft = 0; | |
1781 | if (!update_lft && stored_lft) { | |
1782 | if (valid_lft > MIN_VALID_LIFETIME || | |
1783 | valid_lft > stored_lft) | |
1784 | update_lft = 1; | |
1785 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1786 | /* valid_lft <= stored_lft is always true */ | |
1787 | /* XXX: IPsec */ | |
1788 | update_lft = 0; | |
1789 | } else { | |
1790 | valid_lft = MIN_VALID_LIFETIME; | |
1791 | if (valid_lft < prefered_lft) | |
1792 | prefered_lft = valid_lft; | |
1793 | update_lft = 1; | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | if (update_lft) { | |
1798 | ifp->valid_lft = valid_lft; | |
1799 | ifp->prefered_lft = prefered_lft; | |
1800 | ifp->tstamp = now; | |
1801 | flags = ifp->flags; | |
1802 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1803 | spin_unlock(&ifp->lock); | |
1804 | ||
1805 | if (!(flags&IFA_F_TENTATIVE)) | |
1806 | ipv6_ifa_notify(0, ifp); | |
1807 | } else | |
1808 | spin_unlock(&ifp->lock); | |
1809 | ||
1810 | #ifdef CONFIG_IPV6_PRIVACY | |
1811 | read_lock_bh(&in6_dev->lock); | |
1812 | /* update all temporary addresses in the list */ | |
1813 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1814 | /* | |
1815 | * When adjusting the lifetimes of an existing | |
1816 | * temporary address, only lower the lifetimes. | |
1817 | * Implementations must not increase the | |
1818 | * lifetimes of an existing temporary address | |
1819 | * when processing a Prefix Information Option. | |
1820 | */ | |
1821 | spin_lock(&ift->lock); | |
1822 | flags = ift->flags; | |
1823 | if (ift->valid_lft > valid_lft && | |
1824 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1825 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1826 | if (ift->prefered_lft > prefered_lft && | |
1827 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1828 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1829 | spin_unlock(&ift->lock); | |
1830 | if (!(flags&IFA_F_TENTATIVE)) | |
1831 | ipv6_ifa_notify(0, ift); | |
1832 | } | |
1833 | ||
1834 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1835 | /* | |
1836 | * When a new public address is created as described in [ADDRCONF], | |
1837 | * also create a new temporary address. | |
1838 | */ | |
1ab1457c | 1839 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1840 | ipv6_create_tempaddr(ifp, NULL); |
1841 | } else { | |
1842 | read_unlock_bh(&in6_dev->lock); | |
1843 | } | |
1844 | #endif | |
1845 | in6_ifa_put(ifp); | |
1846 | addrconf_verify(0); | |
1847 | } | |
1848 | } | |
1849 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1850 | in6_dev_put(in6_dev); | |
1851 | } | |
1852 | ||
1853 | /* | |
1854 | * Set destination address. | |
1855 | * Special case for SIT interfaces where we create a new "virtual" | |
1856 | * device. | |
1857 | */ | |
1858 | int addrconf_set_dstaddr(void __user *arg) | |
1859 | { | |
1860 | struct in6_ifreq ireq; | |
1861 | struct net_device *dev; | |
1862 | int err = -EINVAL; | |
1863 | ||
1864 | rtnl_lock(); | |
1865 | ||
1866 | err = -EFAULT; | |
1867 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1868 | goto err_exit; | |
1869 | ||
881d966b | 1870 | dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex); |
1da177e4 LT |
1871 | |
1872 | err = -ENODEV; | |
1873 | if (dev == NULL) | |
1874 | goto err_exit; | |
1875 | ||
0be669bb | 1876 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1877 | if (dev->type == ARPHRD_SIT) { |
1878 | struct ifreq ifr; | |
1879 | mm_segment_t oldfs; | |
1880 | struct ip_tunnel_parm p; | |
1881 | ||
1882 | err = -EADDRNOTAVAIL; | |
1883 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1884 | goto err_exit; | |
1885 | ||
1886 | memset(&p, 0, sizeof(p)); | |
1887 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1888 | p.iph.saddr = 0; | |
1889 | p.iph.version = 4; | |
1890 | p.iph.ihl = 5; | |
1891 | p.iph.protocol = IPPROTO_IPV6; | |
1892 | p.iph.ttl = 64; | |
1893 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1894 | ||
1895 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1896 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1897 | set_fs(oldfs); | |
1898 | ||
1899 | if (err == 0) { | |
1900 | err = -ENOBUFS; | |
881d966b | 1901 | if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL) |
1da177e4 LT |
1902 | goto err_exit; |
1903 | err = dev_open(dev); | |
1904 | } | |
1905 | } | |
0be669bb | 1906 | #endif |
1da177e4 LT |
1907 | |
1908 | err_exit: | |
1909 | rtnl_unlock(); | |
1910 | return err; | |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * Manual configuration of address on an interface | |
1915 | */ | |
0778769d | 1916 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1917 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1918 | { |
1919 | struct inet6_ifaddr *ifp; | |
1920 | struct inet6_dev *idev; | |
1921 | struct net_device *dev; | |
1922 | int scope; | |
46d48046 | 1923 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1924 | |
1925 | ASSERT_RTNL(); | |
1ab1457c | 1926 | |
0778769d NT |
1927 | /* check the lifetime */ |
1928 | if (!valid_lft || prefered_lft > valid_lft) | |
1929 | return -EINVAL; | |
1930 | ||
881d966b | 1931 | if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) |
1da177e4 | 1932 | return -ENODEV; |
1ab1457c | 1933 | |
1da177e4 LT |
1934 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1935 | return -ENOBUFS; | |
1936 | ||
1937 | scope = ipv6_addr_scope(pfx); | |
1938 | ||
46d48046 | 1939 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1940 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1941 | flags = 0; |
1942 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1943 | valid_lft = 0x7FFFFFFF/HZ; |
1944 | ||
1945 | if (prefered_lft == 0) | |
1946 | ifa_flags |= IFA_F_DEPRECATED; | |
1947 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1948 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1949 | prefered_lft = 0x7FFFFFFF/HZ; | |
1950 | ||
1951 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1952 | ||
1da177e4 | 1953 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1954 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1955 | ifp->valid_lft = valid_lft; |
1956 | ifp->prefered_lft = prefered_lft; | |
1957 | ifp->tstamp = jiffies; | |
06aebfb7 | 1958 | spin_unlock_bh(&ifp->lock); |
0778769d | 1959 | |
46d48046 YH |
1960 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1961 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
1962 | /* |
1963 | * Note that section 3.1 of RFC 4429 indicates | |
1964 | * that the Optimistic flag should not be set for | |
1965 | * manually configured addresses | |
1966 | */ | |
1da177e4 LT |
1967 | addrconf_dad_start(ifp, 0); |
1968 | in6_ifa_put(ifp); | |
0778769d | 1969 | addrconf_verify(0); |
1da177e4 LT |
1970 | return 0; |
1971 | } | |
1972 | ||
1973 | return PTR_ERR(ifp); | |
1974 | } | |
1975 | ||
1976 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1977 | { | |
1978 | struct inet6_ifaddr *ifp; | |
1979 | struct inet6_dev *idev; | |
1980 | struct net_device *dev; | |
1ab1457c | 1981 | |
881d966b | 1982 | if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) |
1da177e4 LT |
1983 | return -ENODEV; |
1984 | ||
1985 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1986 | return -ENXIO; | |
1987 | ||
1988 | read_lock_bh(&idev->lock); | |
1989 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1990 | if (ifp->prefix_len == plen && | |
1991 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1992 | in6_ifa_hold(ifp); | |
1993 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1994 | |
1da177e4 LT |
1995 | ipv6_del_addr(ifp); |
1996 | ||
1997 | /* If the last address is deleted administratively, | |
1998 | disable IPv6 on this interface. | |
1999 | */ | |
2000 | if (idev->addr_list == NULL) | |
2001 | addrconf_ifdown(idev->dev, 1); | |
2002 | return 0; | |
2003 | } | |
2004 | } | |
2005 | read_unlock_bh(&idev->lock); | |
2006 | return -EADDRNOTAVAIL; | |
2007 | } | |
2008 | ||
2009 | ||
2010 | int addrconf_add_ifaddr(void __user *arg) | |
2011 | { | |
2012 | struct in6_ifreq ireq; | |
2013 | int err; | |
1ab1457c | 2014 | |
1da177e4 LT |
2015 | if (!capable(CAP_NET_ADMIN)) |
2016 | return -EPERM; | |
1ab1457c | 2017 | |
1da177e4 LT |
2018 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2019 | return -EFAULT; | |
2020 | ||
2021 | rtnl_lock(); | |
0778769d | 2022 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 2023 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
2024 | rtnl_unlock(); |
2025 | return err; | |
2026 | } | |
2027 | ||
2028 | int addrconf_del_ifaddr(void __user *arg) | |
2029 | { | |
2030 | struct in6_ifreq ireq; | |
2031 | int err; | |
1ab1457c | 2032 | |
1da177e4 LT |
2033 | if (!capable(CAP_NET_ADMIN)) |
2034 | return -EPERM; | |
2035 | ||
2036 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2037 | return -EFAULT; | |
2038 | ||
2039 | rtnl_lock(); | |
2040 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2041 | rtnl_unlock(); | |
2042 | return err; | |
2043 | } | |
2044 | ||
0be669bb | 2045 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2046 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2047 | { | |
2048 | struct inet6_ifaddr * ifp; | |
2049 | struct in6_addr addr; | |
2050 | struct net_device *dev; | |
2051 | int scope; | |
2052 | ||
2053 | ASSERT_RTNL(); | |
2054 | ||
2055 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2056 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2057 | ||
2058 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2059 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2060 | scope = IFA_LINK; | |
2061 | } else { | |
2062 | scope = IPV6_ADDR_COMPATv4; | |
2063 | } | |
2064 | ||
2065 | if (addr.s6_addr32[3]) { | |
2066 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2067 | if (!IS_ERR(ifp)) { | |
2068 | spin_lock_bh(&ifp->lock); | |
2069 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2070 | spin_unlock_bh(&ifp->lock); | |
2071 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2072 | in6_ifa_put(ifp); | |
2073 | } | |
2074 | return; | |
2075 | } | |
2076 | ||
881d966b | 2077 | for_each_netdev(&init_net, dev) { |
e5ed6399 | 2078 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2079 | if (in_dev && (dev->flags & IFF_UP)) { |
2080 | struct in_ifaddr * ifa; | |
2081 | ||
2082 | int flag = scope; | |
2083 | ||
2084 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2085 | int plen; | |
2086 | ||
2087 | addr.s6_addr32[3] = ifa->ifa_local; | |
2088 | ||
2089 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2090 | continue; | |
2091 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2092 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2093 | continue; | |
2094 | flag |= IFA_HOST; | |
2095 | } | |
2096 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2097 | plen = 64; | |
2098 | else | |
2099 | plen = 96; | |
2100 | ||
2101 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2102 | IFA_F_PERMANENT); | |
2103 | if (!IS_ERR(ifp)) { | |
2104 | spin_lock_bh(&ifp->lock); | |
2105 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2106 | spin_unlock_bh(&ifp->lock); | |
2107 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2108 | in6_ifa_put(ifp); | |
2109 | } | |
2110 | } | |
2111 | } | |
1ab1457c | 2112 | } |
1da177e4 | 2113 | } |
0be669bb | 2114 | #endif |
1da177e4 LT |
2115 | |
2116 | static void init_loopback(struct net_device *dev) | |
2117 | { | |
2118 | struct inet6_dev *idev; | |
2119 | struct inet6_ifaddr * ifp; | |
2120 | ||
2121 | /* ::1 */ | |
2122 | ||
2123 | ASSERT_RTNL(); | |
2124 | ||
2125 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2126 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2127 | return; | |
2128 | } | |
2129 | ||
2130 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2131 | if (!IS_ERR(ifp)) { | |
2132 | spin_lock_bh(&ifp->lock); | |
2133 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2134 | spin_unlock_bh(&ifp->lock); | |
2135 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2136 | in6_ifa_put(ifp); | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2141 | { | |
2142 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2143 | u32 addr_flags = IFA_F_PERMANENT; |
2144 | ||
2145 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2146 | if (idev->cnf.optimistic_dad && | |
2147 | !ipv6_devconf.forwarding) | |
2148 | addr_flags |= IFA_F_OPTIMISTIC; | |
2149 | #endif | |
1da177e4 | 2150 | |
95c385b4 NH |
2151 | |
2152 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2153 | if (!IS_ERR(ifp)) { |
46d48046 | 2154 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2155 | addrconf_dad_start(ifp, 0); |
2156 | in6_ifa_put(ifp); | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | static void addrconf_dev_config(struct net_device *dev) | |
2161 | { | |
2162 | struct in6_addr addr; | |
2163 | struct inet6_dev * idev; | |
2164 | ||
2165 | ASSERT_RTNL(); | |
2166 | ||
74235a25 HX |
2167 | if ((dev->type != ARPHRD_ETHER) && |
2168 | (dev->type != ARPHRD_FDDI) && | |
2169 | (dev->type != ARPHRD_IEEE802_TR) && | |
2170 | (dev->type != ARPHRD_ARCNET) && | |
2171 | (dev->type != ARPHRD_INFINIBAND)) { | |
2172 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2173 | return; | |
2174 | } | |
2175 | ||
1da177e4 LT |
2176 | idev = addrconf_add_dev(dev); |
2177 | if (idev == NULL) | |
2178 | return; | |
2179 | ||
2180 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2181 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2182 | ||
2183 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2184 | addrconf_add_linklocal(idev, &addr); | |
2185 | } | |
2186 | ||
0be669bb | 2187 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2188 | static void addrconf_sit_config(struct net_device *dev) |
2189 | { | |
2190 | struct inet6_dev *idev; | |
2191 | ||
2192 | ASSERT_RTNL(); | |
2193 | ||
1ab1457c YH |
2194 | /* |
2195 | * Configure the tunnel with one of our IPv4 | |
2196 | * addresses... we should configure all of | |
1da177e4 LT |
2197 | * our v4 addrs in the tunnel |
2198 | */ | |
2199 | ||
2200 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2201 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2202 | return; | |
2203 | } | |
2204 | ||
c7dc89c0 FT |
2205 | if (dev->priv_flags & IFF_ISATAP) { |
2206 | struct in6_addr addr; | |
2207 | ||
2208 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2209 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2210 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2211 | addrconf_add_linklocal(idev, &addr); | |
2212 | return; | |
2213 | } | |
2214 | ||
1da177e4 LT |
2215 | sit_add_v4_addrs(idev); |
2216 | ||
2217 | if (dev->flags&IFF_POINTOPOINT) { | |
2218 | addrconf_add_mroute(dev); | |
2219 | addrconf_add_lroute(dev); | |
2220 | } else | |
2221 | sit_route_add(dev); | |
2222 | } | |
0be669bb | 2223 | #endif |
1da177e4 LT |
2224 | |
2225 | static inline int | |
2226 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2227 | { | |
2228 | struct in6_addr lladdr; | |
2229 | ||
95c385b4 | 2230 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2231 | addrconf_add_linklocal(idev, &lladdr); |
2232 | return 0; | |
2233 | } | |
2234 | return -1; | |
2235 | } | |
2236 | ||
2237 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2238 | { | |
2239 | struct net_device *link_dev; | |
2240 | ||
2241 | /* first try to inherit the link-local address from the link device */ | |
2242 | if (idev->dev->iflink && | |
881d966b | 2243 | (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) { |
1da177e4 LT |
2244 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2245 | return; | |
2246 | } | |
2247 | /* then try to inherit it from any device */ | |
881d966b | 2248 | for_each_netdev(&init_net, link_dev) { |
1da177e4 LT |
2249 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2250 | return; | |
2251 | } | |
2252 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2253 | } | |
2254 | ||
2255 | /* | |
2256 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2257 | * DHCPv6, MLD etc. can be run over the virtual link | |
2258 | */ | |
2259 | ||
2260 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2261 | { | |
2262 | struct inet6_dev *idev; | |
2263 | ||
2264 | ASSERT_RTNL(); | |
2265 | ||
2266 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2267 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2268 | return; | |
2269 | } | |
2270 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2271 | } |
2272 | ||
1ab1457c | 2273 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2274 | void * data) |
2275 | { | |
2276 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2277 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2278 | int run_pending = 0; |
b217d616 | 2279 | int err; |
1da177e4 | 2280 | |
e9dc8653 EB |
2281 | if (dev->nd_net != &init_net) |
2282 | return NOTIFY_DONE; | |
2283 | ||
1da177e4 | 2284 | switch(event) { |
45ba9dd2 | 2285 | case NETDEV_REGISTER: |
74235a25 | 2286 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2287 | idev = ipv6_add_dev(dev); |
2288 | if (!idev) | |
b217d616 | 2289 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2290 | } |
2291 | break; | |
1da177e4 | 2292 | case NETDEV_UP: |
3c21edbd | 2293 | case NETDEV_CHANGE: |
c2edacf8 JV |
2294 | if (dev->flags & IFF_SLAVE) |
2295 | break; | |
2296 | ||
3c21edbd | 2297 | if (event == NETDEV_UP) { |
f24e3d65 | 2298 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2299 | /* device is not ready yet. */ |
2300 | printk(KERN_INFO | |
2301 | "ADDRCONF(NETDEV_UP): %s: " | |
2302 | "link is not ready\n", | |
2303 | dev->name); | |
2304 | break; | |
2305 | } | |
99081049 | 2306 | |
d31c7b8f EP |
2307 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2308 | idev = ipv6_add_dev(dev); | |
2309 | ||
99081049 KS |
2310 | if (idev) |
2311 | idev->if_flags |= IF_READY; | |
3c21edbd | 2312 | } else { |
f24e3d65 | 2313 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2314 | /* device is still not ready. */ |
2315 | break; | |
2316 | } | |
2317 | ||
2318 | if (idev) { | |
2319 | if (idev->if_flags & IF_READY) { | |
2320 | /* device is already configured. */ | |
2321 | break; | |
2322 | } | |
2323 | idev->if_flags |= IF_READY; | |
2324 | } | |
2325 | ||
2326 | printk(KERN_INFO | |
2327 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2328 | "link becomes ready\n", | |
2329 | dev->name); | |
2330 | ||
c5e33bdd | 2331 | run_pending = 1; |
3c21edbd YH |
2332 | } |
2333 | ||
1da177e4 | 2334 | switch(dev->type) { |
0be669bb | 2335 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2336 | case ARPHRD_SIT: |
2337 | addrconf_sit_config(dev); | |
2338 | break; | |
0be669bb | 2339 | #endif |
1da177e4 LT |
2340 | case ARPHRD_TUNNEL6: |
2341 | addrconf_ip6_tnl_config(dev); | |
2342 | break; | |
2343 | case ARPHRD_LOOPBACK: | |
2344 | init_loopback(dev); | |
2345 | break; | |
2346 | ||
2347 | default: | |
2348 | addrconf_dev_config(dev); | |
2349 | break; | |
3ff50b79 | 2350 | } |
1da177e4 | 2351 | if (idev) { |
c5e33bdd YH |
2352 | if (run_pending) |
2353 | addrconf_dad_run(idev); | |
2354 | ||
1da177e4 LT |
2355 | /* If the MTU changed during the interface down, when the |
2356 | interface up, the changed MTU must be reflected in the | |
2357 | idev as well as routers. | |
2358 | */ | |
2359 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2360 | rt6_mtu_change(dev, dev->mtu); | |
2361 | idev->cnf.mtu6 = dev->mtu; | |
2362 | } | |
2363 | idev->tstamp = jiffies; | |
2364 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2365 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2366 | stop IPv6 on this interface. | |
2367 | */ | |
2368 | if (dev->mtu < IPV6_MIN_MTU) | |
2369 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2370 | } | |
2371 | break; | |
2372 | ||
2373 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2374 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2375 | rt6_mtu_change(dev, dev->mtu); |
2376 | idev->cnf.mtu6 = dev->mtu; | |
2377 | break; | |
2378 | } | |
2379 | ||
d31c7b8f EP |
2380 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2381 | idev = ipv6_add_dev(dev); | |
2382 | if (idev) | |
2383 | break; | |
2384 | } | |
2385 | ||
1da177e4 LT |
2386 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2387 | ||
2388 | case NETDEV_DOWN: | |
2389 | case NETDEV_UNREGISTER: | |
2390 | /* | |
2391 | * Remove all addresses from this interface. | |
2392 | */ | |
2393 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2394 | break; | |
3c21edbd | 2395 | |
1da177e4 | 2396 | case NETDEV_CHANGENAME: |
1da177e4 | 2397 | if (idev) { |
5632c515 | 2398 | snmp6_unregister_dev(idev); |
408c4768 | 2399 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2400 | addrconf_sysctl_register(idev); |
b217d616 HX |
2401 | err = snmp6_register_dev(idev); |
2402 | if (err) | |
2403 | return notifier_from_errno(err); | |
5632c515 | 2404 | } |
1da177e4 | 2405 | break; |
3ff50b79 | 2406 | } |
1da177e4 LT |
2407 | |
2408 | return NOTIFY_OK; | |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * addrconf module should be notified of a device going up | |
2413 | */ | |
2414 | static struct notifier_block ipv6_dev_notf = { | |
2415 | .notifier_call = addrconf_notify, | |
2416 | .priority = 0 | |
2417 | }; | |
2418 | ||
2419 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2420 | { | |
2421 | struct inet6_dev *idev; | |
2422 | struct inet6_ifaddr *ifa, **bifa; | |
2423 | int i; | |
2424 | ||
2425 | ASSERT_RTNL(); | |
2426 | ||
2774c7ab | 2427 | if (dev == init_net.loopback_dev && how == 1) |
1da177e4 LT |
2428 | how = 0; |
2429 | ||
2430 | rt6_ifdown(dev); | |
2431 | neigh_ifdown(&nd_tbl, dev); | |
2432 | ||
2433 | idev = __in6_dev_get(dev); | |
2434 | if (idev == NULL) | |
2435 | return -ENODEV; | |
2436 | ||
2437 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2438 | Do not dev_put! |
1da177e4 LT |
2439 | */ |
2440 | if (how == 1) { | |
1da177e4 | 2441 | idev->dead = 1; |
8814c4b5 YH |
2442 | |
2443 | /* protected by rtnl_lock */ | |
2444 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2445 | |
2446 | /* Step 1.5: remove snmp6 entry */ | |
2447 | snmp6_unregister_dev(idev); | |
2448 | ||
2449 | } | |
2450 | ||
2451 | /* Step 2: clear hash table */ | |
2452 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2453 | bifa = &inet6_addr_lst[i]; | |
2454 | ||
2455 | write_lock_bh(&addrconf_hash_lock); | |
2456 | while ((ifa = *bifa) != NULL) { | |
2457 | if (ifa->idev == idev) { | |
2458 | *bifa = ifa->lst_next; | |
2459 | ifa->lst_next = NULL; | |
2460 | addrconf_del_timer(ifa); | |
2461 | in6_ifa_put(ifa); | |
2462 | continue; | |
2463 | } | |
2464 | bifa = &ifa->lst_next; | |
2465 | } | |
2466 | write_unlock_bh(&addrconf_hash_lock); | |
2467 | } | |
2468 | ||
2469 | write_lock_bh(&idev->lock); | |
2470 | ||
2471 | /* Step 3: clear flags for stateless addrconf */ | |
2472 | if (how != 1) | |
3c21edbd | 2473 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2474 | |
2475 | /* Step 4: clear address list */ | |
2476 | #ifdef CONFIG_IPV6_PRIVACY | |
2477 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2478 | in6_dev_put(idev); | |
2479 | ||
2480 | /* clear tempaddr list */ | |
2481 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2482 | idev->tempaddr_list = ifa->tmp_next; | |
2483 | ifa->tmp_next = NULL; | |
2484 | ifa->dead = 1; | |
2485 | write_unlock_bh(&idev->lock); | |
2486 | spin_lock_bh(&ifa->lock); | |
2487 | ||
2488 | if (ifa->ifpub) { | |
2489 | in6_ifa_put(ifa->ifpub); | |
2490 | ifa->ifpub = NULL; | |
2491 | } | |
2492 | spin_unlock_bh(&ifa->lock); | |
2493 | in6_ifa_put(ifa); | |
2494 | write_lock_bh(&idev->lock); | |
2495 | } | |
2496 | #endif | |
2497 | while ((ifa = idev->addr_list) != NULL) { | |
2498 | idev->addr_list = ifa->if_next; | |
2499 | ifa->if_next = NULL; | |
2500 | ifa->dead = 1; | |
2501 | addrconf_del_timer(ifa); | |
2502 | write_unlock_bh(&idev->lock); | |
2503 | ||
2504 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2505 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2506 | in6_ifa_put(ifa); |
2507 | ||
2508 | write_lock_bh(&idev->lock); | |
2509 | } | |
2510 | write_unlock_bh(&idev->lock); | |
2511 | ||
2512 | /* Step 5: Discard multicast list */ | |
2513 | ||
2514 | if (how == 1) | |
2515 | ipv6_mc_destroy_dev(idev); | |
2516 | else | |
2517 | ipv6_mc_down(idev); | |
2518 | ||
1da177e4 | 2519 | idev->tstamp = jiffies; |
1ab1457c | 2520 | |
1da177e4 LT |
2521 | /* Shot the device (if unregistered) */ |
2522 | ||
2523 | if (how == 1) { | |
408c4768 | 2524 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2525 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2526 | neigh_ifdown(&nd_tbl, dev); | |
2527 | in6_dev_put(idev); | |
2528 | } | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | static void addrconf_rs_timer(unsigned long data) | |
2533 | { | |
2534 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2535 | ||
2536 | if (ifp->idev->cnf.forwarding) | |
2537 | goto out; | |
2538 | ||
2539 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2540 | /* | |
2541 | * Announcement received after solicitation | |
2542 | * was sent | |
2543 | */ | |
2544 | goto out; | |
2545 | } | |
2546 | ||
2547 | spin_lock(&ifp->lock); | |
2548 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2549 | struct in6_addr all_routers; | |
2550 | ||
2551 | /* The wait after the last probe can be shorter */ | |
2552 | addrconf_mod_timer(ifp, AC_RS, | |
2553 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2554 | ifp->idev->cnf.rtr_solicit_delay : | |
2555 | ifp->idev->cnf.rtr_solicit_interval); | |
2556 | spin_unlock(&ifp->lock); | |
2557 | ||
2558 | ipv6_addr_all_routers(&all_routers); | |
2559 | ||
2560 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2561 | } else { | |
2562 | spin_unlock(&ifp->lock); | |
2563 | /* | |
2564 | * Note: we do not support deprecated "all on-link" | |
2565 | * assumption any longer. | |
2566 | */ | |
2567 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2568 | ifp->idev->dev->name); | |
2569 | } | |
2570 | ||
2571 | out: | |
2572 | in6_ifa_put(ifp); | |
2573 | } | |
2574 | ||
2575 | /* | |
2576 | * Duplicate Address Detection | |
2577 | */ | |
3c21edbd YH |
2578 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2579 | { | |
2580 | unsigned long rand_num; | |
2581 | struct inet6_dev *idev = ifp->idev; | |
2582 | ||
95c385b4 NH |
2583 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2584 | rand_num = 0; | |
2585 | else | |
2586 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2587 | ||
3c21edbd YH |
2588 | ifp->probes = idev->cnf.dad_transmits; |
2589 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2590 | } | |
2591 | ||
e431b8c0 | 2592 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2593 | { |
2594 | struct inet6_dev *idev = ifp->idev; | |
2595 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2596 | |
2597 | addrconf_join_solict(dev, &ifp->addr); | |
2598 | ||
1da177e4 | 2599 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2600 | |
2601 | read_lock_bh(&idev->lock); | |
2602 | if (ifp->dead) | |
2603 | goto out; | |
2604 | spin_lock_bh(&ifp->lock); | |
2605 | ||
2606 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2607 | !(ifp->flags&IFA_F_TENTATIVE) || |
2608 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2609 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2610 | spin_unlock_bh(&ifp->lock); |
2611 | read_unlock_bh(&idev->lock); | |
2612 | ||
2613 | addrconf_dad_completed(ifp); | |
2614 | return; | |
2615 | } | |
2616 | ||
6732bade | 2617 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2618 | spin_unlock_bh(&ifp->lock); |
6732bade | 2619 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2620 | /* |
2621 | * If the defice is not ready: | |
2622 | * - keep it tentative if it is a permanent address. | |
2623 | * - otherwise, kill it. | |
2624 | */ | |
2625 | in6_ifa_hold(ifp); | |
2626 | addrconf_dad_stop(ifp); | |
6732bade | 2627 | return; |
3c21edbd | 2628 | } |
95c385b4 NH |
2629 | |
2630 | /* | |
2631 | * Optimistic nodes can start receiving | |
2632 | * Frames right away | |
2633 | */ | |
2634 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2635 | ip6_ins_rt(ifp->rt); | |
2636 | ||
6732bade YH |
2637 | addrconf_dad_kick(ifp); |
2638 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2639 | out: |
2640 | read_unlock_bh(&idev->lock); | |
2641 | } | |
2642 | ||
2643 | static void addrconf_dad_timer(unsigned long data) | |
2644 | { | |
2645 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2646 | struct inet6_dev *idev = ifp->idev; | |
2647 | struct in6_addr unspec; | |
2648 | struct in6_addr mcaddr; | |
2649 | ||
2650 | read_lock_bh(&idev->lock); | |
2651 | if (idev->dead) { | |
2652 | read_unlock_bh(&idev->lock); | |
2653 | goto out; | |
2654 | } | |
2655 | spin_lock_bh(&ifp->lock); | |
2656 | if (ifp->probes == 0) { | |
2657 | /* | |
2658 | * DAD was successful | |
2659 | */ | |
2660 | ||
95c385b4 | 2661 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2662 | spin_unlock_bh(&ifp->lock); |
2663 | read_unlock_bh(&idev->lock); | |
2664 | ||
2665 | addrconf_dad_completed(ifp); | |
2666 | ||
2667 | goto out; | |
2668 | } | |
2669 | ||
2670 | ifp->probes--; | |
2671 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2672 | spin_unlock_bh(&ifp->lock); | |
2673 | read_unlock_bh(&idev->lock); | |
2674 | ||
2675 | /* send a neighbour solicitation for our addr */ | |
2676 | memset(&unspec, 0, sizeof(unspec)); | |
2677 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2678 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2679 | out: | |
2680 | in6_ifa_put(ifp); | |
2681 | } | |
2682 | ||
2683 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2684 | { | |
2685 | struct net_device * dev = ifp->idev->dev; | |
2686 | ||
2687 | /* | |
2688 | * Configure the address for reception. Now it is valid. | |
2689 | */ | |
2690 | ||
2691 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2692 | ||
2693 | /* If added prefix is link local and forwarding is off, | |
2694 | start sending router solicitations. | |
2695 | */ | |
2696 | ||
2697 | if (ifp->idev->cnf.forwarding == 0 && | |
2698 | ifp->idev->cnf.rtr_solicits > 0 && | |
2699 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2700 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2701 | struct in6_addr all_routers; | |
2702 | ||
2703 | ipv6_addr_all_routers(&all_routers); | |
2704 | ||
2705 | /* | |
2706 | * If a host as already performed a random delay | |
2707 | * [...] as part of DAD [...] there is no need | |
2708 | * to delay again before sending the first RS | |
2709 | */ | |
2710 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2711 | ||
2712 | spin_lock_bh(&ifp->lock); | |
2713 | ifp->probes = 1; | |
2714 | ifp->idev->if_flags |= IF_RS_SENT; | |
2715 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2716 | spin_unlock_bh(&ifp->lock); | |
2717 | } | |
2718 | } | |
2719 | ||
c5e33bdd YH |
2720 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2721 | struct inet6_ifaddr *ifp; | |
2722 | ||
2723 | read_lock_bh(&idev->lock); | |
2724 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2725 | spin_lock_bh(&ifp->lock); | |
2726 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2727 | spin_unlock_bh(&ifp->lock); | |
2728 | continue; | |
2729 | } | |
2730 | spin_unlock_bh(&ifp->lock); | |
2731 | addrconf_dad_kick(ifp); | |
2732 | } | |
2733 | read_unlock_bh(&idev->lock); | |
2734 | } | |
2735 | ||
1da177e4 LT |
2736 | #ifdef CONFIG_PROC_FS |
2737 | struct if6_iter_state { | |
2738 | int bucket; | |
2739 | }; | |
2740 | ||
2741 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2742 | { | |
2743 | struct inet6_ifaddr *ifa = NULL; | |
2744 | struct if6_iter_state *state = seq->private; | |
2745 | ||
2746 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2747 | ifa = inet6_addr_lst[state->bucket]; | |
2748 | if (ifa) | |
2749 | break; | |
2750 | } | |
2751 | return ifa; | |
2752 | } | |
2753 | ||
2754 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2755 | { | |
2756 | struct if6_iter_state *state = seq->private; | |
2757 | ||
2758 | ifa = ifa->lst_next; | |
2759 | try_again: | |
2760 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2761 | ifa = inet6_addr_lst[state->bucket]; | |
2762 | goto try_again; | |
2763 | } | |
2764 | return ifa; | |
2765 | } | |
2766 | ||
2767 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2768 | { | |
2769 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2770 | ||
2771 | if (ifa) | |
2772 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2773 | --pos; | |
2774 | return pos ? NULL : ifa; | |
2775 | } | |
2776 | ||
2777 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2778 | { | |
2779 | read_lock_bh(&addrconf_hash_lock); | |
2780 | return if6_get_idx(seq, *pos); | |
2781 | } | |
2782 | ||
2783 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2784 | { | |
2785 | struct inet6_ifaddr *ifa; | |
2786 | ||
2787 | ifa = if6_get_next(seq, v); | |
2788 | ++*pos; | |
2789 | return ifa; | |
2790 | } | |
2791 | ||
2792 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2793 | { | |
2794 | read_unlock_bh(&addrconf_hash_lock); | |
2795 | } | |
2796 | ||
2797 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2798 | { | |
2799 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2800 | seq_printf(seq, | |
9343e79a | 2801 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2802 | NIP6(ifp->addr), |
2803 | ifp->idev->dev->ifindex, | |
2804 | ifp->prefix_len, | |
2805 | ifp->scope, | |
2806 | ifp->flags, | |
2807 | ifp->idev->dev->name); | |
2808 | return 0; | |
2809 | } | |
2810 | ||
56b3d975 | 2811 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2812 | .start = if6_seq_start, |
2813 | .next = if6_seq_next, | |
2814 | .show = if6_seq_show, | |
2815 | .stop = if6_seq_stop, | |
2816 | }; | |
2817 | ||
2818 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2819 | { | |
cf7732e4 PE |
2820 | return seq_open_private(file, &if6_seq_ops, |
2821 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
2822 | } |
2823 | ||
9a32144e | 2824 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2825 | .owner = THIS_MODULE, |
2826 | .open = if6_seq_open, | |
2827 | .read = seq_read, | |
2828 | .llseek = seq_lseek, | |
2829 | .release = seq_release_private, | |
2830 | }; | |
2831 | ||
2832 | int __init if6_proc_init(void) | |
2833 | { | |
457c4cbc | 2834 | if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
2835 | return -ENOMEM; |
2836 | return 0; | |
2837 | } | |
2838 | ||
2839 | void if6_proc_exit(void) | |
2840 | { | |
457c4cbc | 2841 | proc_net_remove(&init_net, "if_inet6"); |
1da177e4 LT |
2842 | } |
2843 | #endif /* CONFIG_PROC_FS */ | |
2844 | ||
59fbb3a6 | 2845 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c NT |
2846 | /* Check if address is a home address configured on any interface. */ |
2847 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2848 | { | |
2849 | int ret = 0; | |
2850 | struct inet6_ifaddr * ifp; | |
2851 | u8 hash = ipv6_addr_hash(addr); | |
2852 | read_lock_bh(&addrconf_hash_lock); | |
2853 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2854 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2855 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2856 | ret = 1; | |
2857 | break; | |
2858 | } | |
2859 | } | |
2860 | read_unlock_bh(&addrconf_hash_lock); | |
2861 | return ret; | |
2862 | } | |
2863 | #endif | |
2864 | ||
1da177e4 LT |
2865 | /* |
2866 | * Periodic address status verification | |
2867 | */ | |
2868 | ||
2869 | static void addrconf_verify(unsigned long foo) | |
2870 | { | |
2871 | struct inet6_ifaddr *ifp; | |
2872 | unsigned long now, next; | |
2873 | int i; | |
2874 | ||
2875 | spin_lock_bh(&addrconf_verify_lock); | |
2876 | now = jiffies; | |
2877 | next = now + ADDR_CHECK_FREQUENCY; | |
2878 | ||
2879 | del_timer(&addr_chk_timer); | |
2880 | ||
2881 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2882 | ||
2883 | restart: | |
5d5780df | 2884 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2885 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2886 | unsigned long age; | |
2887 | #ifdef CONFIG_IPV6_PRIVACY | |
2888 | unsigned long regen_advance; | |
2889 | #endif | |
2890 | ||
2891 | if (ifp->flags & IFA_F_PERMANENT) | |
2892 | continue; | |
2893 | ||
2894 | spin_lock(&ifp->lock); | |
2895 | age = (now - ifp->tstamp) / HZ; | |
2896 | ||
2897 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2898 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2899 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2900 | ifp->idev->nd_parms->retrans_time / HZ; |
2901 | #endif | |
2902 | ||
8f27ebb9 YH |
2903 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2904 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2905 | spin_unlock(&ifp->lock); |
2906 | in6_ifa_hold(ifp); | |
5d5780df | 2907 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2908 | ipv6_del_addr(ifp); |
2909 | goto restart; | |
8f27ebb9 YH |
2910 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2911 | spin_unlock(&ifp->lock); | |
2912 | continue; | |
1da177e4 LT |
2913 | } else if (age >= ifp->prefered_lft) { |
2914 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2915 | int deprecate = 0; | |
2916 | ||
2917 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2918 | deprecate = 1; | |
2919 | ifp->flags |= IFA_F_DEPRECATED; | |
2920 | } | |
2921 | ||
2922 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2923 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2924 | ||
2925 | spin_unlock(&ifp->lock); | |
2926 | ||
2927 | if (deprecate) { | |
2928 | in6_ifa_hold(ifp); | |
5d5780df | 2929 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2930 | |
2931 | ipv6_ifa_notify(0, ifp); | |
2932 | in6_ifa_put(ifp); | |
2933 | goto restart; | |
2934 | } | |
2935 | #ifdef CONFIG_IPV6_PRIVACY | |
2936 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2937 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2938 | if (age >= ifp->prefered_lft - regen_advance) { | |
2939 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2940 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2941 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2942 | if (!ifp->regen_count && ifpub) { | |
2943 | ifp->regen_count++; | |
2944 | in6_ifa_hold(ifp); | |
2945 | in6_ifa_hold(ifpub); | |
2946 | spin_unlock(&ifp->lock); | |
5d5780df | 2947 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2948 | spin_lock(&ifpub->lock); |
2949 | ifpub->regen_count = 0; | |
2950 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2951 | ipv6_create_tempaddr(ifpub, ifp); |
2952 | in6_ifa_put(ifpub); | |
2953 | in6_ifa_put(ifp); | |
2954 | goto restart; | |
2955 | } | |
2956 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2957 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2958 | spin_unlock(&ifp->lock); | |
2959 | #endif | |
2960 | } else { | |
2961 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2962 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2963 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2964 | spin_unlock(&ifp->lock); | |
2965 | } | |
2966 | } | |
5d5780df | 2967 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2968 | } |
2969 | ||
2970 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2971 | add_timer(&addr_chk_timer); | |
2972 | spin_unlock_bh(&addrconf_verify_lock); | |
2973 | } | |
2974 | ||
461d8837 TG |
2975 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2976 | { | |
2977 | struct in6_addr *pfx = NULL; | |
2978 | ||
2979 | if (addr) | |
2980 | pfx = nla_data(addr); | |
2981 | ||
2982 | if (local) { | |
2983 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2984 | pfx = NULL; | |
2985 | else | |
2986 | pfx = nla_data(local); | |
2987 | } | |
2988 | ||
2989 | return pfx; | |
2990 | } | |
2991 | ||
ef7c79ed | 2992 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
2993 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
2994 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2995 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2996 | }; | |
2997 | ||
1da177e4 LT |
2998 | static int |
2999 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3000 | { | |
b854272b | 3001 | struct net *net = skb->sk->sk_net; |
b933f716 TG |
3002 | struct ifaddrmsg *ifm; |
3003 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3004 | struct in6_addr *pfx; |
b933f716 | 3005 | int err; |
1da177e4 | 3006 | |
b854272b DL |
3007 | if (net != &init_net) |
3008 | return -EINVAL; | |
3009 | ||
b933f716 TG |
3010 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3011 | if (err < 0) | |
3012 | return err; | |
3013 | ||
3014 | ifm = nlmsg_data(nlh); | |
3015 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3016 | if (pfx == NULL) |
3017 | return -EINVAL; | |
3018 | ||
3019 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
3020 | } | |
3021 | ||
55ebaef1 NT |
3022 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3023 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3024 | { |
46d48046 YH |
3025 | u32 flags = RTF_EXPIRES; |
3026 | ||
081bba5b NT |
3027 | if (!valid_lft || (prefered_lft > valid_lft)) |
3028 | return -EINVAL; | |
3029 | ||
46d48046 | 3030 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 3031 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
3032 | flags = 0; |
3033 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
3034 | valid_lft = 0x7FFFFFFF/HZ; |
3035 | ||
3036 | if (prefered_lft == 0) | |
55ebaef1 | 3037 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
3038 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
3039 | (prefered_lft != INFINITY_LIFE_TIME)) | |
3040 | prefered_lft = 0x7FFFFFFF/HZ; | |
3041 | ||
3042 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3043 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3044 | ifp->tstamp = jiffies; |
3045 | ifp->valid_lft = valid_lft; | |
3046 | ifp->prefered_lft = prefered_lft; | |
3047 | ||
3048 | spin_unlock_bh(&ifp->lock); | |
3049 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3050 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3051 | |
46d48046 YH |
3052 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3053 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3054 | addrconf_verify(0); |
3055 | ||
3056 | return 0; | |
3057 | } | |
3058 | ||
1da177e4 LT |
3059 | static int |
3060 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3061 | { | |
b854272b | 3062 | struct net *net = skb->sk->sk_net; |
461d8837 TG |
3063 | struct ifaddrmsg *ifm; |
3064 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3065 | struct in6_addr *pfx; |
7198f8ce TG |
3066 | struct inet6_ifaddr *ifa; |
3067 | struct net_device *dev; | |
55ebaef1 NT |
3068 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3069 | u8 ifa_flags; | |
461d8837 | 3070 | int err; |
1da177e4 | 3071 | |
b854272b DL |
3072 | if (net != &init_net) |
3073 | return -EINVAL; | |
3074 | ||
461d8837 TG |
3075 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3076 | if (err < 0) | |
3077 | return err; | |
3078 | ||
3079 | ifm = nlmsg_data(nlh); | |
3080 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3081 | if (pfx == NULL) |
3082 | return -EINVAL; | |
3083 | ||
461d8837 | 3084 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3085 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3086 | |
3087 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3088 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3089 | preferred_lft = ci->ifa_prefered; |
3090 | } else { | |
3091 | preferred_lft = INFINITY_LIFE_TIME; | |
3092 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3093 | } |
3094 | ||
881d966b | 3095 | dev = __dev_get_by_index(&init_net, ifm->ifa_index); |
7198f8ce TG |
3096 | if (dev == NULL) |
3097 | return -ENODEV; | |
3098 | ||
55ebaef1 | 3099 | /* We ignore other flags so far. */ |
3b9f9a1c | 3100 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3101 | |
7198f8ce TG |
3102 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3103 | if (ifa == NULL) { | |
3104 | /* | |
3105 | * It would be best to check for !NLM_F_CREATE here but | |
3106 | * userspace alreay relies on not having to provide this. | |
3107 | */ | |
3108 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3109 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3110 | } |
3111 | ||
7198f8ce TG |
3112 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3113 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3114 | err = -EEXIST; | |
3115 | else | |
55ebaef1 | 3116 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3117 | |
3118 | in6_ifa_put(ifa); | |
3119 | ||
3120 | return err; | |
1da177e4 LT |
3121 | } |
3122 | ||
101bb229 TG |
3123 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3124 | u8 scope, int ifindex) | |
3125 | { | |
3126 | struct ifaddrmsg *ifm; | |
3127 | ||
3128 | ifm = nlmsg_data(nlh); | |
3129 | ifm->ifa_family = AF_INET6; | |
3130 | ifm->ifa_prefixlen = prefixlen; | |
3131 | ifm->ifa_flags = flags; | |
3132 | ifm->ifa_scope = scope; | |
3133 | ifm->ifa_index = ifindex; | |
3134 | } | |
3135 | ||
85486af0 TG |
3136 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3137 | unsigned long tstamp, u32 preferred, u32 valid) | |
3138 | { | |
3139 | struct ifa_cacheinfo ci; | |
3140 | ||
3141 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3142 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3143 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3144 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3145 | ci.ifa_prefered = preferred; | |
3146 | ci.ifa_valid = valid; | |
3147 | ||
3148 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3149 | } | |
3150 | ||
101bb229 TG |
3151 | static inline int rt_scope(int ifa_scope) |
3152 | { | |
3153 | if (ifa_scope & IFA_HOST) | |
3154 | return RT_SCOPE_HOST; | |
3155 | else if (ifa_scope & IFA_LINK) | |
3156 | return RT_SCOPE_LINK; | |
3157 | else if (ifa_scope & IFA_SITE) | |
3158 | return RT_SCOPE_SITE; | |
3159 | else | |
3160 | return RT_SCOPE_UNIVERSE; | |
3161 | } | |
3162 | ||
0ab6803b TG |
3163 | static inline int inet6_ifaddr_msgsize(void) |
3164 | { | |
339bf98f TG |
3165 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3166 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3167 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3168 | } |
c5396a31 | 3169 | |
1da177e4 | 3170 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3171 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3172 | { |
1da177e4 | 3173 | struct nlmsghdr *nlh; |
85486af0 | 3174 | u32 preferred, valid; |
1da177e4 | 3175 | |
0ab6803b TG |
3176 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3177 | if (nlh == NULL) | |
26932566 | 3178 | return -EMSGSIZE; |
0ab6803b | 3179 | |
101bb229 TG |
3180 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3181 | ifa->idev->dev->ifindex); | |
3182 | ||
1da177e4 | 3183 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3184 | preferred = ifa->prefered_lft; |
3185 | valid = ifa->valid_lft; | |
3186 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3187 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3188 | preferred -= tval; |
3189 | if (valid != INFINITY_LIFE_TIME) | |
3190 | valid -= tval; | |
1da177e4 LT |
3191 | } |
3192 | } else { | |
85486af0 TG |
3193 | preferred = INFINITY_LIFE_TIME; |
3194 | valid = INFINITY_LIFE_TIME; | |
3195 | } | |
3196 | ||
0ab6803b | 3197 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3198 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3199 | nlmsg_cancel(skb, nlh); | |
3200 | return -EMSGSIZE; | |
3201 | } | |
1da177e4 | 3202 | |
0ab6803b | 3203 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3204 | } |
3205 | ||
3206 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3207 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3208 | { |
1da177e4 | 3209 | struct nlmsghdr *nlh; |
101bb229 TG |
3210 | u8 scope = RT_SCOPE_UNIVERSE; |
3211 | int ifindex = ifmca->idev->dev->ifindex; | |
3212 | ||
3213 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3214 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3215 | |
0ab6803b TG |
3216 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3217 | if (nlh == NULL) | |
26932566 | 3218 | return -EMSGSIZE; |
85486af0 | 3219 | |
0ab6803b TG |
3220 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3221 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3222 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3223 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3224 | nlmsg_cancel(skb, nlh); | |
3225 | return -EMSGSIZE; | |
3226 | } | |
85486af0 | 3227 | |
0ab6803b | 3228 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3229 | } |
3230 | ||
3231 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3232 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3233 | { |
1da177e4 | 3234 | struct nlmsghdr *nlh; |
101bb229 TG |
3235 | u8 scope = RT_SCOPE_UNIVERSE; |
3236 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3237 | ||
3238 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3239 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3240 | |
0ab6803b TG |
3241 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3242 | if (nlh == NULL) | |
26932566 | 3243 | return -EMSGSIZE; |
85486af0 | 3244 | |
0ab6803b TG |
3245 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3246 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3247 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3248 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3249 | nlmsg_cancel(skb, nlh); | |
3250 | return -EMSGSIZE; | |
3251 | } | |
1da177e4 | 3252 | |
0ab6803b | 3253 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3254 | } |
3255 | ||
3256 | enum addr_type_t | |
3257 | { | |
3258 | UNICAST_ADDR, | |
3259 | MULTICAST_ADDR, | |
3260 | ANYCAST_ADDR, | |
3261 | }; | |
3262 | ||
3263 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3264 | enum addr_type_t type) | |
3265 | { | |
3266 | int idx, ip_idx; | |
3267 | int s_idx, s_ip_idx; | |
3268 | int err = 1; | |
3269 | struct net_device *dev; | |
3270 | struct inet6_dev *idev = NULL; | |
3271 | struct inet6_ifaddr *ifa; | |
3272 | struct ifmcaddr6 *ifmca; | |
3273 | struct ifacaddr6 *ifaca; | |
3274 | ||
3275 | s_idx = cb->args[0]; | |
3276 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3277 | |
7562f876 | 3278 | idx = 0; |
881d966b | 3279 | for_each_netdev(&init_net, dev) { |
1da177e4 | 3280 | if (idx < s_idx) |
7562f876 | 3281 | goto cont; |
1da177e4 LT |
3282 | if (idx > s_idx) |
3283 | s_ip_idx = 0; | |
3284 | ip_idx = 0; | |
3285 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3286 | goto cont; |
1da177e4 LT |
3287 | read_lock_bh(&idev->lock); |
3288 | switch (type) { | |
3289 | case UNICAST_ADDR: | |
ae9cda5d | 3290 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3291 | for (ifa = idev->addr_list; ifa; |
3292 | ifa = ifa->if_next, ip_idx++) { | |
3293 | if (ip_idx < s_ip_idx) | |
3294 | continue; | |
1ab1457c YH |
3295 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3296 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3297 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3298 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3299 | goto done; |
3300 | } | |
1da177e4 LT |
3301 | break; |
3302 | case MULTICAST_ADDR: | |
3303 | /* multicast address */ | |
1ab1457c | 3304 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3305 | ifmca = ifmca->next, ip_idx++) { |
3306 | if (ip_idx < s_ip_idx) | |
3307 | continue; | |
1ab1457c YH |
3308 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3309 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3310 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3311 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3312 | goto done; |
3313 | } | |
3314 | break; | |
3315 | case ANYCAST_ADDR: | |
3316 | /* anycast address */ | |
3317 | for (ifaca = idev->ac_list; ifaca; | |
3318 | ifaca = ifaca->aca_next, ip_idx++) { | |
3319 | if (ip_idx < s_ip_idx) | |
3320 | continue; | |
1ab1457c YH |
3321 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3322 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3323 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3324 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3325 | goto done; |
3326 | } | |
3327 | break; | |
3328 | default: | |
3329 | break; | |
3330 | } | |
3331 | read_unlock_bh(&idev->lock); | |
3332 | in6_dev_put(idev); | |
7562f876 PE |
3333 | cont: |
3334 | idx++; | |
1da177e4 LT |
3335 | } |
3336 | done: | |
3337 | if (err <= 0) { | |
3338 | read_unlock_bh(&idev->lock); | |
3339 | in6_dev_put(idev); | |
3340 | } | |
1da177e4 LT |
3341 | cb->args[0] = idx; |
3342 | cb->args[1] = ip_idx; | |
3343 | return skb->len; | |
3344 | } | |
3345 | ||
3346 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3347 | { | |
b854272b | 3348 | struct net *net = skb->sk->sk_net; |
1da177e4 | 3349 | enum addr_type_t type = UNICAST_ADDR; |
b854272b DL |
3350 | |
3351 | if (net != &init_net) | |
3352 | return 0; | |
3353 | ||
1da177e4 LT |
3354 | return inet6_dump_addr(skb, cb, type); |
3355 | } | |
3356 | ||
3357 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3358 | { | |
b854272b | 3359 | struct net *net = skb->sk->sk_net; |
1da177e4 | 3360 | enum addr_type_t type = MULTICAST_ADDR; |
b854272b DL |
3361 | |
3362 | if (net != &init_net) | |
3363 | return 0; | |
3364 | ||
1da177e4 LT |
3365 | return inet6_dump_addr(skb, cb, type); |
3366 | } | |
3367 | ||
3368 | ||
3369 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3370 | { | |
b854272b | 3371 | struct net *net = skb->sk->sk_net; |
1da177e4 | 3372 | enum addr_type_t type = ANYCAST_ADDR; |
b854272b DL |
3373 | |
3374 | if (net != &init_net) | |
3375 | return 0; | |
3376 | ||
1da177e4 LT |
3377 | return inet6_dump_addr(skb, cb, type); |
3378 | } | |
3379 | ||
1b29fc2c TG |
3380 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3381 | void *arg) | |
6c223828 | 3382 | { |
b854272b | 3383 | struct net *net = in_skb->sk->sk_net; |
1b29fc2c TG |
3384 | struct ifaddrmsg *ifm; |
3385 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3386 | struct in6_addr *addr = NULL; |
3387 | struct net_device *dev = NULL; | |
3388 | struct inet6_ifaddr *ifa; | |
3389 | struct sk_buff *skb; | |
6c223828 NT |
3390 | int err; |
3391 | ||
b854272b DL |
3392 | if (net != &init_net) |
3393 | return -EINVAL; | |
3394 | ||
1b29fc2c TG |
3395 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3396 | if (err < 0) | |
3397 | goto errout; | |
3398 | ||
3399 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3400 | if (addr == NULL) { | |
3401 | err = -EINVAL; | |
3402 | goto errout; | |
6c223828 | 3403 | } |
6c223828 | 3404 | |
1b29fc2c | 3405 | ifm = nlmsg_data(nlh); |
6c223828 | 3406 | if (ifm->ifa_index) |
881d966b | 3407 | dev = __dev_get_by_index(&init_net, ifm->ifa_index); |
6c223828 | 3408 | |
1b29fc2c TG |
3409 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3410 | err = -EADDRNOTAVAIL; | |
3411 | goto errout; | |
3412 | } | |
6c223828 | 3413 | |
0ab6803b | 3414 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3415 | err = -ENOBUFS; |
1b29fc2c | 3416 | goto errout_ifa; |
6c223828 NT |
3417 | } |
3418 | ||
6c223828 NT |
3419 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3420 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3421 | if (err < 0) { |
3422 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3423 | WARN_ON(err == -EMSGSIZE); | |
3424 | kfree_skb(skb); | |
3425 | goto errout_ifa; | |
3426 | } | |
97c53cac | 3427 | err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3428 | errout_ifa: |
6c223828 | 3429 | in6_ifa_put(ifa); |
1b29fc2c | 3430 | errout: |
6c223828 | 3431 | return err; |
6c223828 NT |
3432 | } |
3433 | ||
1da177e4 LT |
3434 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3435 | { | |
3436 | struct sk_buff *skb; | |
5d620266 | 3437 | int err = -ENOBUFS; |
1da177e4 | 3438 | |
0ab6803b | 3439 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3440 | if (skb == NULL) |
3441 | goto errout; | |
3442 | ||
3443 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3444 | if (err < 0) { |
3445 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3446 | WARN_ON(err == -EMSGSIZE); | |
3447 | kfree_skb(skb); | |
3448 | goto errout; | |
3449 | } | |
97c53cac | 3450 | err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5d620266 TG |
3451 | errout: |
3452 | if (err < 0) | |
97c53cac | 3453 | rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3454 | } |
3455 | ||
b6f99a21 | 3456 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3457 | __s32 *array, int bytes) |
3458 | { | |
04561c1f TG |
3459 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3460 | ||
1da177e4 LT |
3461 | memset(array, 0, bytes); |
3462 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3463 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3464 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3465 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3466 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3467 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3468 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3469 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3470 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3471 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3472 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3473 | #ifdef CONFIG_IPV6_PRIVACY | |
3474 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3475 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3476 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3477 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3478 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3479 | #endif | |
3480 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3481 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3482 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3483 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3484 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3485 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3486 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3487 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3488 | #endif | |
930d6ff2 | 3489 | #endif |
fbea49e1 | 3490 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3491 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3492 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3493 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3494 | #endif | |
1da177e4 LT |
3495 | } |
3496 | ||
339bf98f TG |
3497 | static inline size_t inet6_if_nlmsg_size(void) |
3498 | { | |
3499 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3500 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3501 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3502 | + nla_total_size(4) /* IFLA_MTU */ | |
3503 | + nla_total_size(4) /* IFLA_LINK */ | |
3504 | + nla_total_size( /* IFLA_PROTINFO */ | |
3505 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3506 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3507 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3508 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3509 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3510 | ); |
3511 | } | |
c5396a31 | 3512 | |
7f7d9a6b HX |
3513 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3514 | int bytes) | |
3515 | { | |
3516 | int i; | |
3517 | int pad = bytes - sizeof(u64) * items; | |
3518 | BUG_ON(pad < 0); | |
3519 | ||
3520 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3521 | put_unaligned(items, &stats[0]); | |
3522 | for (i = 1; i < items; i++) | |
3523 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3524 | ||
3525 | memset(&stats[items], 0, pad); | |
3526 | } | |
3527 | ||
3528 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3529 | int bytes) | |
3530 | { | |
3531 | switch(attrtype) { | |
3532 | case IFLA_INET6_STATS: | |
3533 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3534 | break; | |
3535 | case IFLA_INET6_ICMP6STATS: | |
3536 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3537 | break; | |
3538 | } | |
3539 | } | |
3540 | ||
1ab1457c | 3541 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3542 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3543 | { |
04561c1f | 3544 | struct net_device *dev = idev->dev; |
bf99f1bd | 3545 | struct nlattr *nla; |
04561c1f TG |
3546 | struct ifinfomsg *hdr; |
3547 | struct nlmsghdr *nlh; | |
3548 | void *protoinfo; | |
3549 | struct ifla_cacheinfo ci; | |
3550 | ||
3551 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3552 | if (nlh == NULL) | |
26932566 | 3553 | return -EMSGSIZE; |
04561c1f TG |
3554 | |
3555 | hdr = nlmsg_data(nlh); | |
3556 | hdr->ifi_family = AF_INET6; | |
3557 | hdr->__ifi_pad = 0; | |
3558 | hdr->ifi_type = dev->type; | |
3559 | hdr->ifi_index = dev->ifindex; | |
3560 | hdr->ifi_flags = dev_get_flags(dev); | |
3561 | hdr->ifi_change = 0; | |
3562 | ||
3563 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3564 | |
3565 | if (dev->addr_len) | |
04561c1f | 3566 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3567 | |
04561c1f | 3568 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3569 | if (dev->ifindex != dev->iflink) |
04561c1f | 3570 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3571 | |
04561c1f TG |
3572 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3573 | if (protoinfo == NULL) | |
3574 | goto nla_put_failure; | |
1da177e4 | 3575 | |
04561c1f | 3576 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3577 | |
1da177e4 LT |
3578 | ci.max_reasm_len = IPV6_MAXPLEN; |
3579 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3580 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3581 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3582 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3583 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3584 | ||
bf99f1bd YH |
3585 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3586 | if (nla == NULL) | |
04561c1f | 3587 | goto nla_put_failure; |
bf99f1bd | 3588 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3589 | |
bf99f1bd YH |
3590 | /* XXX - MC not implemented */ |
3591 | ||
3592 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3593 | if (nla == NULL) | |
3594 | goto nla_put_failure; | |
3595 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3596 | ||
3597 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3598 | if (nla == NULL) | |
3599 | goto nla_put_failure; | |
3600 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3601 | |
04561c1f TG |
3602 | nla_nest_end(skb, protoinfo); |
3603 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3604 | |
04561c1f | 3605 | nla_put_failure: |
26932566 PM |
3606 | nlmsg_cancel(skb, nlh); |
3607 | return -EMSGSIZE; | |
1da177e4 LT |
3608 | } |
3609 | ||
3610 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3611 | { | |
b854272b | 3612 | struct net *net = skb->sk->sk_net; |
1da177e4 LT |
3613 | int idx, err; |
3614 | int s_idx = cb->args[0]; | |
3615 | struct net_device *dev; | |
3616 | struct inet6_dev *idev; | |
3617 | ||
b854272b DL |
3618 | if (net != &init_net) |
3619 | return 0; | |
3620 | ||
1da177e4 | 3621 | read_lock(&dev_base_lock); |
7562f876 | 3622 | idx = 0; |
881d966b | 3623 | for_each_netdev(&init_net, dev) { |
1da177e4 | 3624 | if (idx < s_idx) |
7562f876 | 3625 | goto cont; |
1da177e4 | 3626 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3627 | goto cont; |
1ab1457c | 3628 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3629 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3630 | in6_dev_put(idev); |
3631 | if (err <= 0) | |
3632 | break; | |
7562f876 PE |
3633 | cont: |
3634 | idx++; | |
1da177e4 LT |
3635 | } |
3636 | read_unlock(&dev_base_lock); | |
3637 | cb->args[0] = idx; | |
3638 | ||
3639 | return skb->len; | |
3640 | } | |
3641 | ||
3642 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3643 | { | |
3644 | struct sk_buff *skb; | |
8d7a76c9 | 3645 | int err = -ENOBUFS; |
1ab1457c | 3646 | |
339bf98f | 3647 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3648 | if (skb == NULL) |
3649 | goto errout; | |
3650 | ||
3651 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3652 | if (err < 0) { |
3653 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3654 | WARN_ON(err == -EMSGSIZE); | |
3655 | kfree_skb(skb); | |
3656 | goto errout; | |
3657 | } | |
97c53cac | 3658 | err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
8d7a76c9 TG |
3659 | errout: |
3660 | if (err < 0) | |
97c53cac | 3661 | rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3662 | } |
3663 | ||
339bf98f TG |
3664 | static inline size_t inet6_prefix_nlmsg_size(void) |
3665 | { | |
3666 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3667 | + nla_total_size(sizeof(struct in6_addr)) | |
3668 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3669 | } | |
c5396a31 | 3670 | |
1da177e4 | 3671 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3672 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3673 | int event, unsigned int flags) | |
1da177e4 | 3674 | { |
6051e2f4 TG |
3675 | struct prefixmsg *pmsg; |
3676 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3677 | struct prefix_cacheinfo ci; |
3678 | ||
6051e2f4 TG |
3679 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3680 | if (nlh == NULL) | |
26932566 | 3681 | return -EMSGSIZE; |
6051e2f4 TG |
3682 | |
3683 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3684 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3685 | pmsg->prefix_pad1 = 0; |
3686 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3687 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3688 | pmsg->prefix_len = pinfo->prefix_len; | |
3689 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3690 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3691 | pmsg->prefix_flags = 0; |
3692 | if (pinfo->onlink) | |
3693 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3694 | if (pinfo->autoconf) | |
3695 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3696 | ||
6051e2f4 | 3697 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3698 | |
3699 | ci.preferred_time = ntohl(pinfo->prefered); | |
3700 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3701 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3702 | |
6051e2f4 | 3703 | return nlmsg_end(skb, nlh); |
1da177e4 | 3704 | |
6051e2f4 | 3705 | nla_put_failure: |
26932566 PM |
3706 | nlmsg_cancel(skb, nlh); |
3707 | return -EMSGSIZE; | |
1da177e4 LT |
3708 | } |
3709 | ||
1ab1457c | 3710 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3711 | struct prefix_info *pinfo) |
3712 | { | |
3713 | struct sk_buff *skb; | |
8c384bfa | 3714 | int err = -ENOBUFS; |
1da177e4 | 3715 | |
339bf98f | 3716 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3717 | if (skb == NULL) |
3718 | goto errout; | |
3719 | ||
3720 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3721 | if (err < 0) { |
3722 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3723 | WARN_ON(err == -EMSGSIZE); | |
3724 | kfree_skb(skb); | |
3725 | goto errout; | |
3726 | } | |
97c53cac | 3727 | err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
8c384bfa TG |
3728 | errout: |
3729 | if (err < 0) | |
97c53cac | 3730 | rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3731 | } |
3732 | ||
1da177e4 LT |
3733 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3734 | { | |
3735 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3736 | ||
3737 | switch (event) { | |
3738 | case RTM_NEWADDR: | |
95c385b4 NH |
3739 | /* |
3740 | * If the address was optimistic | |
3741 | * we inserted the route at the start of | |
3742 | * our DAD process, so we don't need | |
3743 | * to do it again | |
3744 | */ | |
3745 | if (!(ifp->rt->rt6i_node)) | |
3746 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3747 | if (ifp->idev->cnf.forwarding) |
3748 | addrconf_join_anycast(ifp); | |
3749 | break; | |
3750 | case RTM_DELADDR: | |
3751 | if (ifp->idev->cnf.forwarding) | |
3752 | addrconf_leave_anycast(ifp); | |
3753 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3754 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3755 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3756 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3757 | break; |
3758 | } | |
3759 | } | |
3760 | ||
3761 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3762 | { | |
8814c4b5 | 3763 | rcu_read_lock_bh(); |
1da177e4 LT |
3764 | if (likely(ifp->idev->dead == 0)) |
3765 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3766 | rcu_read_unlock_bh(); |
1da177e4 LT |
3767 | } |
3768 | ||
3769 | #ifdef CONFIG_SYSCTL | |
3770 | ||
3771 | static | |
3772 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3773 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3774 | { | |
3775 | int *valp = ctl->data; | |
3776 | int val = *valp; | |
3777 | int ret; | |
3778 | ||
3779 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3780 | ||
c8fecf22 PE |
3781 | if (write) |
3782 | addrconf_fixup_forwarding(ctl, valp, val); | |
1ab1457c | 3783 | return ret; |
1da177e4 LT |
3784 | } |
3785 | ||
1ab1457c | 3786 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3787 | int __user *name, int nlen, |
3788 | void __user *oldval, | |
3789 | size_t __user *oldlenp, | |
1f29bcd7 | 3790 | void __user *newval, size_t newlen) |
1da177e4 LT |
3791 | { |
3792 | int *valp = table->data; | |
c8fecf22 | 3793 | int val = *valp; |
1da177e4 LT |
3794 | int new; |
3795 | ||
3796 | if (!newval || !newlen) | |
3797 | return 0; | |
3798 | if (newlen != sizeof(int)) | |
3799 | return -EINVAL; | |
3800 | if (get_user(new, (int __user *)newval)) | |
3801 | return -EFAULT; | |
3802 | if (new == *valp) | |
3803 | return 0; | |
3804 | if (oldval && oldlenp) { | |
3805 | size_t len; | |
3806 | if (get_user(len, oldlenp)) | |
3807 | return -EFAULT; | |
3808 | if (len) { | |
3809 | if (len > table->maxlen) | |
3810 | len = table->maxlen; | |
3811 | if (copy_to_user(oldval, valp, len)) | |
3812 | return -EFAULT; | |
3813 | if (put_user(len, oldlenp)) | |
3814 | return -EFAULT; | |
3815 | } | |
3816 | } | |
3817 | ||
c8fecf22 PE |
3818 | *valp = new; |
3819 | addrconf_fixup_forwarding(table, valp, val); | |
1da177e4 LT |
3820 | return 1; |
3821 | } | |
3822 | ||
3823 | static struct addrconf_sysctl_table | |
3824 | { | |
3825 | struct ctl_table_header *sysctl_header; | |
3826 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
1dab6222 | 3827 | char *dev_name; |
ab32ea5d | 3828 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3829 | .sysctl_header = NULL, |
3830 | .addrconf_vars = { | |
1ab1457c | 3831 | { |
1da177e4 LT |
3832 | .ctl_name = NET_IPV6_FORWARDING, |
3833 | .procname = "forwarding", | |
1ab1457c | 3834 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3835 | .maxlen = sizeof(int), |
3836 | .mode = 0644, | |
1ab1457c | 3837 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3838 | .strategy = &addrconf_sysctl_forward_strategy, |
3839 | }, | |
3840 | { | |
3841 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3842 | .procname = "hop_limit", | |
1ab1457c | 3843 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3844 | .maxlen = sizeof(int), |
3845 | .mode = 0644, | |
3846 | .proc_handler = proc_dointvec, | |
3847 | }, | |
3848 | { | |
3849 | .ctl_name = NET_IPV6_MTU, | |
3850 | .procname = "mtu", | |
3851 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3852 | .maxlen = sizeof(int), |
1da177e4 | 3853 | .mode = 0644, |
1ab1457c | 3854 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3855 | }, |
3856 | { | |
3857 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3858 | .procname = "accept_ra", | |
1ab1457c | 3859 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3860 | .maxlen = sizeof(int), |
3861 | .mode = 0644, | |
1ab1457c | 3862 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3863 | }, |
3864 | { | |
3865 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3866 | .procname = "accept_redirects", | |
1ab1457c | 3867 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3868 | .maxlen = sizeof(int), |
3869 | .mode = 0644, | |
1ab1457c | 3870 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3871 | }, |
3872 | { | |
3873 | .ctl_name = NET_IPV6_AUTOCONF, | |
3874 | .procname = "autoconf", | |
1ab1457c | 3875 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3876 | .maxlen = sizeof(int), |
3877 | .mode = 0644, | |
1ab1457c | 3878 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3879 | }, |
3880 | { | |
3881 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3882 | .procname = "dad_transmits", | |
1ab1457c | 3883 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3884 | .maxlen = sizeof(int), |
3885 | .mode = 0644, | |
1ab1457c | 3886 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3887 | }, |
3888 | { | |
3889 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3890 | .procname = "router_solicitations", | |
1ab1457c | 3891 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3892 | .maxlen = sizeof(int), |
3893 | .mode = 0644, | |
1ab1457c | 3894 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3895 | }, |
3896 | { | |
3897 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3898 | .procname = "router_solicitation_interval", | |
1ab1457c | 3899 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3900 | .maxlen = sizeof(int), |
3901 | .mode = 0644, | |
1ab1457c | 3902 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3903 | .strategy = &sysctl_jiffies, |
3904 | }, | |
3905 | { | |
3906 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3907 | .procname = "router_solicitation_delay", | |
1ab1457c | 3908 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3909 | .maxlen = sizeof(int), |
3910 | .mode = 0644, | |
1ab1457c | 3911 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3912 | .strategy = &sysctl_jiffies, |
3913 | }, | |
3914 | { | |
3915 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3916 | .procname = "force_mld_version", | |
1ab1457c | 3917 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3918 | .maxlen = sizeof(int), |
3919 | .mode = 0644, | |
1ab1457c | 3920 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3921 | }, |
3922 | #ifdef CONFIG_IPV6_PRIVACY | |
3923 | { | |
3924 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3925 | .procname = "use_tempaddr", | |
1ab1457c | 3926 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3927 | .maxlen = sizeof(int), |
3928 | .mode = 0644, | |
1ab1457c | 3929 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3930 | }, |
3931 | { | |
3932 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3933 | .procname = "temp_valid_lft", | |
1ab1457c | 3934 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3935 | .maxlen = sizeof(int), |
3936 | .mode = 0644, | |
1ab1457c | 3937 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3938 | }, |
3939 | { | |
3940 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3941 | .procname = "temp_prefered_lft", | |
1ab1457c | 3942 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3943 | .maxlen = sizeof(int), |
3944 | .mode = 0644, | |
1ab1457c | 3945 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3946 | }, |
3947 | { | |
3948 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3949 | .procname = "regen_max_retry", | |
1ab1457c | 3950 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3951 | .maxlen = sizeof(int), |
3952 | .mode = 0644, | |
1ab1457c | 3953 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3954 | }, |
3955 | { | |
3956 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3957 | .procname = "max_desync_factor", | |
1ab1457c | 3958 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3959 | .maxlen = sizeof(int), |
3960 | .mode = 0644, | |
1ab1457c | 3961 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3962 | }, |
3963 | #endif | |
3964 | { | |
3965 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3966 | .procname = "max_addresses", | |
3967 | .data = &ipv6_devconf.max_addresses, | |
3968 | .maxlen = sizeof(int), | |
3969 | .mode = 0644, | |
3970 | .proc_handler = &proc_dointvec, | |
3971 | }, | |
65f5c7c1 YH |
3972 | { |
3973 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3974 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3975 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3976 | .maxlen = sizeof(int), |
3977 | .mode = 0644, | |
1ab1457c | 3978 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3979 | }, |
c4fd30eb YH |
3980 | { |
3981 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3982 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3983 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3984 | .maxlen = sizeof(int), |
3985 | .mode = 0644, | |
1ab1457c | 3986 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3987 | }, |
930d6ff2 YH |
3988 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3989 | { | |
3990 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3991 | .procname = "accept_ra_rtr_pref", | |
3992 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3993 | .maxlen = sizeof(int), | |
3994 | .mode = 0644, | |
3995 | .proc_handler = &proc_dointvec, | |
3996 | }, | |
52e16356 YH |
3997 | { |
3998 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3999 | .procname = "router_probe_interval", | |
4000 | .data = &ipv6_devconf.rtr_probe_interval, | |
4001 | .maxlen = sizeof(int), | |
4002 | .mode = 0644, | |
4003 | .proc_handler = &proc_dointvec_jiffies, | |
4004 | .strategy = &sysctl_jiffies, | |
4005 | }, | |
fa03ef38 | 4006 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4007 | { |
4008 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4009 | .procname = "accept_ra_rt_info_max_plen", | |
4010 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4011 | .maxlen = sizeof(int), | |
4012 | .mode = 0644, | |
4013 | .proc_handler = &proc_dointvec, | |
4014 | }, | |
4015 | #endif | |
930d6ff2 | 4016 | #endif |
fbea49e1 YH |
4017 | { |
4018 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4019 | .procname = "proxy_ndp", | |
4020 | .data = &ipv6_devconf.proxy_ndp, | |
4021 | .maxlen = sizeof(int), | |
4022 | .mode = 0644, | |
4023 | .proc_handler = &proc_dointvec, | |
4024 | }, | |
0bcbc926 YH |
4025 | { |
4026 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4027 | .procname = "accept_source_route", | |
4028 | .data = &ipv6_devconf.accept_source_route, | |
4029 | .maxlen = sizeof(int), | |
4030 | .mode = 0644, | |
4031 | .proc_handler = &proc_dointvec, | |
4032 | }, | |
95c385b4 NH |
4033 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4034 | { | |
4035 | .ctl_name = CTL_UNNUMBERED, | |
4036 | .procname = "optimistic_dad", | |
4037 | .data = &ipv6_devconf.optimistic_dad, | |
4038 | .maxlen = sizeof(int), | |
4039 | .mode = 0644, | |
4040 | .proc_handler = &proc_dointvec, | |
4041 | ||
4042 | }, | |
4043 | #endif | |
1da177e4 LT |
4044 | { |
4045 | .ctl_name = 0, /* sentinel */ | |
4046 | } | |
4047 | }, | |
1da177e4 LT |
4048 | }; |
4049 | ||
bff16c2f PE |
4050 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4051 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4052 | { |
4053 | int i; | |
1da177e4 | 4054 | struct addrconf_sysctl_table *t; |
1da177e4 | 4055 | |
1dab6222 PE |
4056 | #define ADDRCONF_CTL_PATH_DEV 3 |
4057 | ||
4058 | struct ctl_path addrconf_ctl_path[] = { | |
4059 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4060 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4061 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4062 | { /* to be set */ }, | |
4063 | { }, | |
4064 | }; | |
4065 | ||
4066 | ||
af879cc7 | 4067 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4068 | if (t == NULL) |
f68635e6 PE |
4069 | goto out; |
4070 | ||
1da177e4 LT |
4071 | for (i=0; t->addrconf_vars[i].data; i++) { |
4072 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4073 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4074 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4075 | } |
1da177e4 | 4076 | |
1ab1457c YH |
4077 | /* |
4078 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4079 | * by sysctl and we wouldn't want anyone to change it under our feet |
4080 | * (see SIOCSIFNAME). | |
1ab1457c | 4081 | */ |
1dab6222 PE |
4082 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4083 | if (!t->dev_name) | |
f68635e6 | 4084 | goto free; |
1da177e4 | 4085 | |
1dab6222 PE |
4086 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4087 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4088 | |
bff16c2f | 4089 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4090 | t->addrconf_vars); |
1da177e4 LT |
4091 | if (t->sysctl_header == NULL) |
4092 | goto free_procname; | |
f68635e6 PE |
4093 | |
4094 | p->sysctl = t; | |
95897312 | 4095 | return 0; |
1da177e4 | 4096 | |
f68635e6 | 4097 | free_procname: |
1dab6222 | 4098 | kfree(t->dev_name); |
f68635e6 | 4099 | free: |
1da177e4 | 4100 | kfree(t); |
f68635e6 | 4101 | out: |
95897312 | 4102 | return -ENOBUFS; |
1da177e4 LT |
4103 | } |
4104 | ||
408c4768 PE |
4105 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4106 | { | |
4107 | struct addrconf_sysctl_table *t; | |
4108 | ||
4109 | if (p->sysctl == NULL) | |
4110 | return; | |
4111 | ||
4112 | t = p->sysctl; | |
4113 | p->sysctl = NULL; | |
4114 | unregister_sysctl_table(t->sysctl_header); | |
4115 | kfree(t->dev_name); | |
4116 | kfree(t); | |
4117 | } | |
4118 | ||
f52295a9 PE |
4119 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4120 | { | |
408c4768 PE |
4121 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4122 | NET_IPV6_NEIGH, "ipv6", | |
4123 | &ndisc_ifinfo_sysctl_change, | |
4124 | NULL); | |
bff16c2f PE |
4125 | __addrconf_sysctl_register(idev->dev->nd_net, idev->dev->name, |
4126 | idev->dev->ifindex, idev, &idev->cnf); | |
f52295a9 PE |
4127 | } |
4128 | ||
408c4768 | 4129 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4130 | { |
408c4768 PE |
4131 | __addrconf_sysctl_unregister(&idev->cnf); |
4132 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4133 | } |
4134 | ||
4135 | ||
4136 | #endif | |
4137 | ||
4138 | /* | |
4139 | * Device notifier | |
4140 | */ | |
4141 | ||
4142 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4143 | { | |
1ab1457c | 4144 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4145 | } |
4146 | ||
7159039a YH |
4147 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4148 | ||
1da177e4 LT |
4149 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4150 | { | |
1ab1457c | 4151 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4152 | } |
4153 | ||
7159039a YH |
4154 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4155 | ||
1da177e4 LT |
4156 | /* |
4157 | * Init / cleanup code | |
4158 | */ | |
4159 | ||
4160 | int __init addrconf_init(void) | |
4161 | { | |
2a8cc6c8 YH |
4162 | int err; |
4163 | ||
4164 | if ((err = ipv6_addr_label_init()) < 0) { | |
4165 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4166 | err); | |
4167 | return err; | |
4168 | } | |
1da177e4 LT |
4169 | |
4170 | /* The addrconf netdev notifier requires that loopback_dev | |
4171 | * has it's ipv6 private information allocated and setup | |
4172 | * before it can bring up and give link-local addresses | |
4173 | * to other devices which are up. | |
4174 | * | |
4175 | * Unfortunately, loopback_dev is not necessarily the first | |
4176 | * entry in the global dev_base list of net devices. In fact, | |
4177 | * it is likely to be the very last entry on that list. | |
4178 | * So this causes the notifier registry below to try and | |
4179 | * give link-local addresses to all devices besides loopback_dev | |
4180 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4181 | * devices to fail to get a link-local address. | |
4182 | * | |
4183 | * So, as a temporary fix, allocate the ipv6 structure for | |
4184 | * loopback_dev first by hand. | |
4185 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4186 | * device and it being up should be removed. | |
4187 | */ | |
4188 | rtnl_lock(); | |
2774c7ab | 4189 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4190 | err = -ENOMEM; |
4191 | rtnl_unlock(); | |
4192 | if (err) | |
4193 | return err; | |
4194 | ||
2774c7ab EB |
4195 | ip6_null_entry.u.dst.dev = init_net.loopback_dev; |
4196 | ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); | |
9a6bf6fe | 4197 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
2774c7ab EB |
4198 | ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev; |
4199 | ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); | |
4200 | ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev; | |
4201 | ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); | |
9a6bf6fe | 4202 | #endif |
c62dba90 | 4203 | |
1da177e4 LT |
4204 | register_netdevice_notifier(&ipv6_dev_notf); |
4205 | ||
1da177e4 | 4206 | addrconf_verify(0); |
c127ea2c TG |
4207 | |
4208 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4209 | if (err < 0) | |
4210 | goto errout; | |
4211 | ||
4212 | /* Only the first call to __rtnl_register can fail */ | |
4213 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4214 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4215 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4216 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4217 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4218 | ||
2a8cc6c8 YH |
4219 | ipv6_addr_label_rtnl_register(); |
4220 | ||
1da177e4 | 4221 | #ifdef CONFIG_SYSCTL |
bff16c2f | 4222 | __addrconf_sysctl_register(&init_net, "all", NET_PROTO_CONF_ALL, |
f52295a9 | 4223 | NULL, &ipv6_devconf); |
bff16c2f | 4224 | __addrconf_sysctl_register(&init_net, "default", NET_PROTO_CONF_DEFAULT, |
f52295a9 | 4225 | NULL, &ipv6_devconf_dflt); |
1da177e4 LT |
4226 | #endif |
4227 | ||
4228 | return 0; | |
c127ea2c TG |
4229 | errout: |
4230 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4231 | ||
4232 | return err; | |
1da177e4 LT |
4233 | } |
4234 | ||
09f7709f | 4235 | void addrconf_cleanup(void) |
1da177e4 | 4236 | { |
1ab1457c | 4237 | struct net_device *dev; |
1ab1457c | 4238 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4239 | int i; |
4240 | ||
4241 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4242 | ||
1da177e4 | 4243 | #ifdef CONFIG_SYSCTL |
408c4768 PE |
4244 | __addrconf_sysctl_unregister(&ipv6_devconf_dflt); |
4245 | __addrconf_sysctl_unregister(&ipv6_devconf); | |
1da177e4 LT |
4246 | #endif |
4247 | ||
4248 | rtnl_lock(); | |
4249 | ||
4250 | /* | |
4251 | * clean dev list. | |
4252 | */ | |
4253 | ||
881d966b | 4254 | for_each_netdev(&init_net, dev) { |
dffe4f04 | 4255 | if (__in6_dev_get(dev) == NULL) |
1da177e4 LT |
4256 | continue; |
4257 | addrconf_ifdown(dev, 1); | |
4258 | } | |
2774c7ab | 4259 | addrconf_ifdown(init_net.loopback_dev, 2); |
1da177e4 LT |
4260 | |
4261 | /* | |
4262 | * Check hash table. | |
4263 | */ | |
4264 | ||
4265 | write_lock_bh(&addrconf_hash_lock); | |
4266 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4267 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4268 | struct inet6_ifaddr *bifa; | |
4269 | ||
4270 | bifa = ifa; | |
4271 | ifa = ifa->lst_next; | |
4272 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4273 | /* Do not free it; something is wrong. | |
4274 | Now we can investigate it with debugger. | |
4275 | */ | |
4276 | } | |
4277 | } | |
4278 | write_unlock_bh(&addrconf_hash_lock); | |
4279 | ||
4280 | del_timer(&addr_chk_timer); | |
4281 | ||
4282 | rtnl_unlock(); | |
1da177e4 | 4283 | } |