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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
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> | |
47 | #include <linux/sched.h> | |
48 | #include <linux/net.h> | |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
58 | #ifdef CONFIG_SYSCTL | |
59 | #include <linux/sysctl.h> | |
60 | #endif | |
4fc268d2 | 61 | #include <linux/capability.h> |
1da177e4 LT |
62 | #include <linux/delay.h> |
63 | #include <linux/notifier.h> | |
543537bd | 64 | #include <linux/string.h> |
1da177e4 LT |
65 | |
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> |
1da177e4 LT |
77 | #include <linux/if_tunnel.h> |
78 | #include <linux/rtnetlink.h> | |
79 | ||
80 | #ifdef CONFIG_IPV6_PRIVACY | |
81 | #include <linux/random.h> | |
1da177e4 LT |
82 | #endif |
83 | ||
84 | #include <asm/uaccess.h> | |
85 | ||
86 | #include <linux/proc_fs.h> | |
87 | #include <linux/seq_file.h> | |
88 | ||
89 | /* Set to 3 to get tracing... */ | |
90 | #define ACONF_DEBUG 2 | |
91 | ||
92 | #if ACONF_DEBUG >= 3 | |
93 | #define ADBG(x) printk x | |
94 | #else | |
95 | #define ADBG(x) | |
96 | #endif | |
97 | ||
98 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
99 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
100 | ||
101 | #ifdef CONFIG_SYSCTL | |
102 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
103 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
104 | #endif | |
105 | ||
106 | #ifdef CONFIG_IPV6_PRIVACY | |
107 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
108 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
109 | static void ipv6_regen_rndid(unsigned long data); | |
110 | ||
111 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
112 | #endif |
113 | ||
114 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
115 | ||
116 | /* | |
117 | * Configured unicast address hash table | |
118 | */ | |
119 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
120 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
121 | ||
1da177e4 LT |
122 | static void addrconf_verify(unsigned long); |
123 | ||
8d06afab | 124 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
125 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
126 | ||
127 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
128 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
129 | ||
130 | static int addrconf_ifdown(struct net_device *dev, int how); | |
131 | ||
e431b8c0 | 132 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
133 | static void addrconf_dad_timer(unsigned long data); |
134 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 135 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
136 | static void addrconf_rs_timer(unsigned long data); |
137 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
138 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | ||
140 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
141 | struct prefix_info *pinfo); | |
142 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
143 | ||
e041c683 | 144 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 145 | |
ab32ea5d | 146 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
147 | .forwarding = 0, |
148 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
149 | .mtu6 = IPV6_MIN_MTU, | |
150 | .accept_ra = 1, | |
151 | .accept_redirects = 1, | |
152 | .autoconf = 1, | |
153 | .force_mld_version = 0, | |
154 | .dad_transmits = 1, | |
155 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
156 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
157 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
158 | #ifdef CONFIG_IPV6_PRIVACY | |
159 | .use_tempaddr = 0, | |
160 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
161 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
162 | .regen_max_retry = REGEN_MAX_RETRY, | |
163 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
164 | #endif | |
165 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 166 | .accept_ra_defrtr = 1, |
c4fd30eb | 167 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
168 | #ifdef CONFIG_IPV6_ROUTER_PREF |
169 | .accept_ra_rtr_pref = 1, | |
52e16356 | 170 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
171 | #ifdef CONFIG_IPV6_ROUTE_INFO |
172 | .accept_ra_rt_info_max_plen = 0, | |
173 | #endif | |
930d6ff2 | 174 | #endif |
fbea49e1 | 175 | .proxy_ndp = 0, |
1da177e4 LT |
176 | }; |
177 | ||
ab32ea5d | 178 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
179 | .forwarding = 0, |
180 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
181 | .mtu6 = IPV6_MIN_MTU, | |
182 | .accept_ra = 1, | |
183 | .accept_redirects = 1, | |
184 | .autoconf = 1, | |
185 | .dad_transmits = 1, | |
186 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
187 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
188 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
189 | #ifdef CONFIG_IPV6_PRIVACY | |
190 | .use_tempaddr = 0, | |
191 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
192 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
193 | .regen_max_retry = REGEN_MAX_RETRY, | |
194 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
195 | #endif | |
196 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 197 | .accept_ra_defrtr = 1, |
c4fd30eb | 198 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
199 | #ifdef CONFIG_IPV6_ROUTER_PREF |
200 | .accept_ra_rtr_pref = 1, | |
52e16356 | 201 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
202 | #ifdef CONFIG_IPV6_ROUTE_INFO |
203 | .accept_ra_rt_info_max_plen = 0, | |
204 | #endif | |
930d6ff2 | 205 | #endif |
fbea49e1 | 206 | .proxy_ndp = 0, |
1da177e4 LT |
207 | }; |
208 | ||
209 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
210 | #if 0 | |
211 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
212 | #endif | |
213 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
214 | ||
b1cacb68 YH |
215 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) |
216 | ||
217 | static inline unsigned ipv6_addr_scope2type(unsigned scope) | |
218 | { | |
219 | switch(scope) { | |
220 | case IPV6_ADDR_SCOPE_NODELOCAL: | |
221 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
222 | IPV6_ADDR_LOOPBACK); | |
223 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
224 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
225 | IPV6_ADDR_LINKLOCAL); | |
226 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
227 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
228 | IPV6_ADDR_SITELOCAL); | |
229 | } | |
230 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
231 | } | |
232 | ||
233 | int __ipv6_addr_type(const struct in6_addr *addr) | |
1da177e4 | 234 | { |
1da177e4 LT |
235 | u32 st; |
236 | ||
237 | st = addr->s6_addr32[0]; | |
238 | ||
1da177e4 | 239 | /* Consider all addresses with the first three bits different of |
b1cacb68 | 240 | 000 and 111 as unicasts. |
1da177e4 LT |
241 | */ |
242 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
243 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
b1cacb68 YH |
244 | return (IPV6_ADDR_UNICAST | |
245 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
1da177e4 | 246 | |
b1cacb68 YH |
247 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { |
248 | /* multicast */ | |
249 | /* addr-select 3.1 */ | |
250 | return (IPV6_ADDR_MULTICAST | | |
251 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
252 | } | |
253 | ||
254 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
255 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
256 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
1da177e4 | 257 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) |
b1cacb68 YH |
258 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | |
259 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
1da177e4 LT |
260 | |
261 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
262 | if (addr->s6_addr32[2] == 0) { | |
263 | if (addr->s6_addr32[3] == 0) | |
264 | return IPV6_ADDR_ANY; | |
265 | ||
266 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
b1cacb68 YH |
267 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | |
268 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
1da177e4 | 269 | |
b1cacb68 YH |
270 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | |
271 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
272 | } |
273 | ||
274 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
b1cacb68 YH |
275 | return (IPV6_ADDR_MAPPED | |
276 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
277 | } |
278 | ||
b1cacb68 YH |
279 | return (IPV6_ADDR_RESERVED | |
280 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ | |
1da177e4 LT |
281 | } |
282 | ||
283 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) | |
284 | { | |
285 | if (del_timer(&ifp->timer)) | |
286 | __in6_ifa_put(ifp); | |
287 | } | |
288 | ||
289 | enum addrconf_timer_t | |
290 | { | |
291 | AC_NONE, | |
292 | AC_DAD, | |
293 | AC_RS, | |
294 | }; | |
295 | ||
296 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
297 | enum addrconf_timer_t what, | |
298 | unsigned long when) | |
299 | { | |
300 | if (!del_timer(&ifp->timer)) | |
301 | in6_ifa_hold(ifp); | |
302 | ||
303 | switch (what) { | |
304 | case AC_DAD: | |
305 | ifp->timer.function = addrconf_dad_timer; | |
306 | break; | |
307 | case AC_RS: | |
308 | ifp->timer.function = addrconf_rs_timer; | |
309 | break; | |
310 | default:; | |
311 | } | |
312 | ifp->timer.expires = jiffies + when; | |
313 | add_timer(&ifp->timer); | |
314 | } | |
315 | ||
316 | /* Nobody refers to this device, we may destroy it. */ | |
317 | ||
8814c4b5 YH |
318 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
319 | { | |
320 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
321 | kfree(idev); | |
322 | } | |
323 | ||
1da177e4 LT |
324 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
325 | { | |
326 | struct net_device *dev = idev->dev; | |
327 | BUG_TRAP(idev->addr_list==NULL); | |
328 | BUG_TRAP(idev->mc_list==NULL); | |
329 | #ifdef NET_REFCNT_DEBUG | |
330 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
331 | #endif | |
332 | dev_put(dev); | |
333 | if (!idev->dead) { | |
334 | printk("Freeing alive inet6 device %p\n", idev); | |
335 | return; | |
336 | } | |
337 | snmp6_free_dev(idev); | |
8814c4b5 | 338 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
339 | } |
340 | ||
341 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
342 | { | |
343 | struct inet6_dev *ndev; | |
344 | ||
345 | ASSERT_RTNL(); | |
346 | ||
347 | if (dev->mtu < IPV6_MIN_MTU) | |
348 | return NULL; | |
349 | ||
322f74a4 IO |
350 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
351 | ||
352 | if (ndev == NULL) | |
353 | return NULL; | |
354 | ||
355 | rwlock_init(&ndev->lock); | |
356 | ndev->dev = dev; | |
357 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
358 | ndev->cnf.mtu6 = dev->mtu; | |
359 | ndev->cnf.sysctl = NULL; | |
360 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
361 | if (ndev->nd_parms == NULL) { | |
362 | kfree(ndev); | |
363 | return NULL; | |
364 | } | |
365 | /* We refer to the device */ | |
366 | dev_hold(dev); | |
1da177e4 | 367 | |
322f74a4 IO |
368 | if (snmp6_alloc_dev(ndev) < 0) { |
369 | ADBG((KERN_WARNING | |
370 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
371 | __FUNCTION__, dev->name)); | |
372 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
373 | ndev->dead = 1; | |
374 | in6_dev_finish_destroy(ndev); | |
375 | return NULL; | |
376 | } | |
1da177e4 | 377 | |
322f74a4 IO |
378 | if (snmp6_register_dev(ndev) < 0) { |
379 | ADBG((KERN_WARNING | |
380 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
381 | __FUNCTION__, dev->name)); | |
382 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
383 | ndev->dead = 1; | |
384 | in6_dev_finish_destroy(ndev); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | /* One reference from device. We must do this before | |
389 | * we invoke __ipv6_regen_rndid(). | |
390 | */ | |
391 | in6_dev_hold(ndev); | |
1da177e4 LT |
392 | |
393 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
394 | init_timer(&ndev->regen_timer); |
395 | ndev->regen_timer.function = ipv6_regen_rndid; | |
396 | ndev->regen_timer.data = (unsigned long) ndev; | |
397 | if ((dev->flags&IFF_LOOPBACK) || | |
398 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
399 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
400 | dev->type == ARPHRD_SIT || | |
401 | #endif | |
402 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
403 | printk(KERN_INFO |
404 | "%s: Disabled Privacy Extensions\n", | |
405 | dev->name); | |
406 | ndev->cnf.use_tempaddr = -1; | |
407 | } else { | |
408 | in6_dev_hold(ndev); | |
409 | ipv6_regen_rndid((unsigned long) ndev); | |
410 | } | |
1da177e4 LT |
411 | #endif |
412 | ||
322f74a4 IO |
413 | if (netif_carrier_ok(dev)) |
414 | ndev->if_flags |= IF_READY; | |
3c21edbd | 415 | |
8814c4b5 YH |
416 | /* protected by rtnl_lock */ |
417 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
1da177e4 | 418 | |
322f74a4 IO |
419 | ipv6_mc_init_dev(ndev); |
420 | ndev->tstamp = jiffies; | |
1da177e4 | 421 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
422 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
423 | NET_IPV6_NEIGH, "ipv6", | |
424 | &ndisc_ifinfo_sysctl_change, | |
425 | NULL); | |
426 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 427 | #endif |
1da177e4 LT |
428 | return ndev; |
429 | } | |
430 | ||
431 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
432 | { | |
433 | struct inet6_dev *idev; | |
434 | ||
435 | ASSERT_RTNL(); | |
436 | ||
437 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
438 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
439 | return NULL; | |
440 | } | |
c5e33bdd | 441 | |
1da177e4 LT |
442 | if (dev->flags&IFF_UP) |
443 | ipv6_mc_up(idev); | |
444 | return idev; | |
445 | } | |
446 | ||
447 | #ifdef CONFIG_SYSCTL | |
448 | static void dev_forward_change(struct inet6_dev *idev) | |
449 | { | |
450 | struct net_device *dev; | |
451 | struct inet6_ifaddr *ifa; | |
452 | struct in6_addr addr; | |
453 | ||
454 | if (!idev) | |
455 | return; | |
456 | dev = idev->dev; | |
457 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
458 | ipv6_addr_all_routers(&addr); | |
459 | ||
460 | if (idev->cnf.forwarding) | |
461 | ipv6_dev_mc_inc(dev, &addr); | |
462 | else | |
463 | ipv6_dev_mc_dec(dev, &addr); | |
464 | } | |
465 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
466 | if (idev->cnf.forwarding) | |
467 | addrconf_join_anycast(ifa); | |
468 | else | |
469 | addrconf_leave_anycast(ifa); | |
470 | } | |
471 | } | |
472 | ||
473 | ||
474 | static void addrconf_forward_change(void) | |
475 | { | |
476 | struct net_device *dev; | |
477 | struct inet6_dev *idev; | |
478 | ||
479 | read_lock(&dev_base_lock); | |
480 | for (dev=dev_base; dev; dev=dev->next) { | |
8814c4b5 | 481 | rcu_read_lock(); |
1da177e4 LT |
482 | idev = __in6_dev_get(dev); |
483 | if (idev) { | |
484 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
485 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
486 | if (changed) | |
487 | dev_forward_change(idev); | |
488 | } | |
8814c4b5 | 489 | rcu_read_unlock(); |
1da177e4 LT |
490 | } |
491 | read_unlock(&dev_base_lock); | |
492 | } | |
493 | #endif | |
494 | ||
495 | /* Nobody refers to this ifaddr, destroy it */ | |
496 | ||
497 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
498 | { | |
499 | BUG_TRAP(ifp->if_next==NULL); | |
500 | BUG_TRAP(ifp->lst_next==NULL); | |
501 | #ifdef NET_REFCNT_DEBUG | |
502 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
503 | #endif | |
504 | ||
505 | in6_dev_put(ifp->idev); | |
506 | ||
507 | if (del_timer(&ifp->timer)) | |
508 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
509 | ||
510 | if (!ifp->dead) { | |
511 | printk("Freeing alive inet6 address %p\n", ifp); | |
512 | return; | |
513 | } | |
514 | dst_release(&ifp->rt->u.dst); | |
515 | ||
516 | kfree(ifp); | |
517 | } | |
518 | ||
e55ffac6 BH |
519 | static void |
520 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
521 | { | |
522 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 523 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
524 | |
525 | /* | |
526 | * Each device address list is sorted in order of scope - | |
527 | * global before linklocal. | |
528 | */ | |
529 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
530 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 531 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
532 | break; |
533 | } | |
534 | ||
535 | ifp->if_next = *ifap; | |
536 | *ifap = ifp; | |
537 | } | |
538 | ||
1da177e4 LT |
539 | /* On success it returns ifp with increased reference count */ |
540 | ||
541 | static struct inet6_ifaddr * | |
542 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 543 | int scope, u32 flags) |
1da177e4 LT |
544 | { |
545 | struct inet6_ifaddr *ifa = NULL; | |
546 | struct rt6_info *rt; | |
547 | int hash; | |
548 | int err = 0; | |
549 | ||
8814c4b5 | 550 | rcu_read_lock_bh(); |
1da177e4 LT |
551 | if (idev->dead) { |
552 | err = -ENODEV; /*XXX*/ | |
553 | goto out2; | |
554 | } | |
555 | ||
556 | write_lock(&addrconf_hash_lock); | |
557 | ||
558 | /* Ignore adding duplicate addresses on an interface */ | |
559 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
560 | ADBG(("ipv6_add_addr: already assigned\n")); | |
561 | err = -EEXIST; | |
562 | goto out; | |
563 | } | |
564 | ||
322f74a4 | 565 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
566 | |
567 | if (ifa == NULL) { | |
568 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
569 | err = -ENOBUFS; | |
570 | goto out; | |
571 | } | |
572 | ||
573 | rt = addrconf_dst_alloc(idev, addr, 0); | |
574 | if (IS_ERR(rt)) { | |
575 | err = PTR_ERR(rt); | |
576 | goto out; | |
577 | } | |
578 | ||
1da177e4 LT |
579 | ipv6_addr_copy(&ifa->addr, addr); |
580 | ||
581 | spin_lock_init(&ifa->lock); | |
582 | init_timer(&ifa->timer); | |
583 | ifa->timer.data = (unsigned long) ifa; | |
584 | ifa->scope = scope; | |
585 | ifa->prefix_len = pfxlen; | |
586 | ifa->flags = flags | IFA_F_TENTATIVE; | |
587 | ifa->cstamp = ifa->tstamp = jiffies; | |
588 | ||
57f5f544 KF |
589 | ifa->rt = rt; |
590 | ||
1da177e4 LT |
591 | ifa->idev = idev; |
592 | in6_dev_hold(idev); | |
593 | /* For caller */ | |
594 | in6_ifa_hold(ifa); | |
595 | ||
596 | /* Add to big hash table */ | |
597 | hash = ipv6_addr_hash(addr); | |
598 | ||
599 | ifa->lst_next = inet6_addr_lst[hash]; | |
600 | inet6_addr_lst[hash] = ifa; | |
601 | in6_ifa_hold(ifa); | |
602 | write_unlock(&addrconf_hash_lock); | |
603 | ||
604 | write_lock(&idev->lock); | |
605 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 606 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
607 | |
608 | #ifdef CONFIG_IPV6_PRIVACY | |
609 | if (ifa->flags&IFA_F_TEMPORARY) { | |
610 | ifa->tmp_next = idev->tempaddr_list; | |
611 | idev->tempaddr_list = ifa; | |
612 | in6_ifa_hold(ifa); | |
613 | } | |
614 | #endif | |
615 | ||
1da177e4 LT |
616 | in6_ifa_hold(ifa); |
617 | write_unlock(&idev->lock); | |
618 | out2: | |
8814c4b5 | 619 | rcu_read_unlock_bh(); |
1da177e4 | 620 | |
fd92833a | 621 | if (likely(err == 0)) |
e041c683 | 622 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
623 | else { |
624 | kfree(ifa); | |
625 | ifa = ERR_PTR(err); | |
626 | } | |
627 | ||
628 | return ifa; | |
629 | out: | |
630 | write_unlock(&addrconf_hash_lock); | |
631 | goto out2; | |
632 | } | |
633 | ||
634 | /* This function wants to get referenced ifp and releases it before return */ | |
635 | ||
636 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
637 | { | |
638 | struct inet6_ifaddr *ifa, **ifap; | |
639 | struct inet6_dev *idev = ifp->idev; | |
640 | int hash; | |
641 | int deleted = 0, onlink = 0; | |
642 | unsigned long expires = jiffies; | |
643 | ||
644 | hash = ipv6_addr_hash(&ifp->addr); | |
645 | ||
646 | ifp->dead = 1; | |
647 | ||
648 | write_lock_bh(&addrconf_hash_lock); | |
649 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
650 | ifap = &ifa->lst_next) { | |
651 | if (ifa == ifp) { | |
652 | *ifap = ifa->lst_next; | |
653 | __in6_ifa_put(ifp); | |
654 | ifa->lst_next = NULL; | |
655 | break; | |
656 | } | |
657 | } | |
658 | write_unlock_bh(&addrconf_hash_lock); | |
659 | ||
660 | write_lock_bh(&idev->lock); | |
661 | #ifdef CONFIG_IPV6_PRIVACY | |
662 | if (ifp->flags&IFA_F_TEMPORARY) { | |
663 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
664 | ifap = &ifa->tmp_next) { | |
665 | if (ifa == ifp) { | |
666 | *ifap = ifa->tmp_next; | |
667 | if (ifp->ifpub) { | |
668 | in6_ifa_put(ifp->ifpub); | |
669 | ifp->ifpub = NULL; | |
670 | } | |
671 | __in6_ifa_put(ifp); | |
672 | ifa->tmp_next = NULL; | |
673 | break; | |
674 | } | |
675 | } | |
676 | } | |
677 | #endif | |
678 | ||
1d142804 | 679 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
680 | if (ifa == ifp) { |
681 | *ifap = ifa->if_next; | |
682 | __in6_ifa_put(ifp); | |
683 | ifa->if_next = NULL; | |
684 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
685 | break; | |
686 | deleted = 1; | |
1d142804 | 687 | continue; |
1da177e4 LT |
688 | } else if (ifp->flags & IFA_F_PERMANENT) { |
689 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
690 | ifp->prefix_len)) { | |
691 | if (ifa->flags & IFA_F_PERMANENT) { | |
692 | onlink = 1; | |
693 | if (deleted) | |
694 | break; | |
695 | } else { | |
696 | unsigned long lifetime; | |
697 | ||
698 | if (!onlink) | |
699 | onlink = -1; | |
700 | ||
701 | spin_lock(&ifa->lock); | |
702 | lifetime = min_t(unsigned long, | |
703 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
704 | if (time_before(expires, | |
705 | ifa->tstamp + lifetime * HZ)) | |
706 | expires = ifa->tstamp + lifetime * HZ; | |
707 | spin_unlock(&ifa->lock); | |
708 | } | |
709 | } | |
710 | } | |
1d142804 | 711 | ifap = &ifa->if_next; |
1da177e4 LT |
712 | } |
713 | write_unlock_bh(&idev->lock); | |
714 | ||
715 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
716 | ||
e041c683 | 717 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
718 | |
719 | addrconf_del_timer(ifp); | |
720 | ||
721 | /* | |
722 | * Purge or update corresponding prefix | |
723 | * | |
724 | * 1) we don't purge prefix here if address was not permanent. | |
725 | * prefix is managed by its own lifetime. | |
726 | * 2) if there're no addresses, delete prefix. | |
727 | * 3) if there're still other permanent address(es), | |
728 | * corresponding prefix is still permanent. | |
729 | * 4) otherwise, update prefix lifetime to the | |
730 | * longest valid lifetime among the corresponding | |
731 | * addresses on the device. | |
732 | * Note: subsequent RA will update lifetime. | |
733 | * | |
734 | * --yoshfuji | |
735 | */ | |
736 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
737 | struct in6_addr prefix; | |
738 | struct rt6_info *rt; | |
739 | ||
740 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
741 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
742 | ||
743 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
744 | if (onlink == 0) { | |
e0a1ad73 | 745 | ip6_del_rt(rt); |
1da177e4 LT |
746 | rt = NULL; |
747 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
748 | rt->rt6i_expires = expires; | |
749 | rt->rt6i_flags |= RTF_EXPIRES; | |
750 | } | |
751 | } | |
752 | dst_release(&rt->u.dst); | |
753 | } | |
754 | ||
755 | in6_ifa_put(ifp); | |
756 | } | |
757 | ||
758 | #ifdef CONFIG_IPV6_PRIVACY | |
759 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
760 | { | |
761 | struct inet6_dev *idev = ifp->idev; | |
762 | struct in6_addr addr, *tmpaddr; | |
763 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
764 | int tmp_plen; | |
765 | int ret = 0; | |
766 | int max_addresses; | |
767 | ||
768 | write_lock(&idev->lock); | |
769 | if (ift) { | |
770 | spin_lock_bh(&ift->lock); | |
771 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
772 | spin_unlock_bh(&ift->lock); | |
773 | tmpaddr = &addr; | |
774 | } else { | |
775 | tmpaddr = NULL; | |
776 | } | |
777 | retry: | |
778 | in6_dev_hold(idev); | |
779 | if (idev->cnf.use_tempaddr <= 0) { | |
780 | write_unlock(&idev->lock); | |
781 | printk(KERN_INFO | |
782 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
783 | in6_dev_put(idev); | |
784 | ret = -1; | |
785 | goto out; | |
786 | } | |
787 | spin_lock_bh(&ifp->lock); | |
788 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
789 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
790 | spin_unlock_bh(&ifp->lock); | |
791 | write_unlock(&idev->lock); | |
792 | printk(KERN_WARNING | |
793 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
794 | in6_dev_put(idev); | |
795 | ret = -1; | |
796 | goto out; | |
797 | } | |
798 | in6_ifa_hold(ifp); | |
799 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
800 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
801 | spin_unlock_bh(&ifp->lock); | |
802 | write_unlock(&idev->lock); | |
803 | printk(KERN_WARNING | |
804 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
805 | in6_ifa_put(ifp); | |
806 | in6_dev_put(idev); | |
807 | ret = -1; | |
808 | goto out; | |
809 | } | |
810 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
811 | tmp_valid_lft = min_t(__u32, | |
812 | ifp->valid_lft, | |
813 | idev->cnf.temp_valid_lft); | |
814 | tmp_prefered_lft = min_t(__u32, | |
815 | ifp->prefered_lft, | |
816 | idev->cnf.temp_prefered_lft - desync_factor / HZ); | |
817 | tmp_plen = ifp->prefix_len; | |
818 | max_addresses = idev->cnf.max_addresses; | |
819 | tmp_cstamp = ifp->cstamp; | |
820 | tmp_tstamp = ifp->tstamp; | |
821 | spin_unlock_bh(&ifp->lock); | |
822 | ||
823 | write_unlock(&idev->lock); | |
824 | ift = !max_addresses || | |
825 | ipv6_count_addresses(idev) < max_addresses ? | |
826 | ipv6_add_addr(idev, &addr, tmp_plen, | |
827 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
828 | if (!ift || IS_ERR(ift)) { | |
829 | in6_ifa_put(ifp); | |
830 | in6_dev_put(idev); | |
831 | printk(KERN_INFO | |
832 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
833 | tmpaddr = &addr; | |
834 | write_lock(&idev->lock); | |
835 | goto retry; | |
836 | } | |
837 | ||
838 | spin_lock_bh(&ift->lock); | |
839 | ift->ifpub = ifp; | |
840 | ift->valid_lft = tmp_valid_lft; | |
841 | ift->prefered_lft = tmp_prefered_lft; | |
842 | ift->cstamp = tmp_cstamp; | |
843 | ift->tstamp = tmp_tstamp; | |
844 | spin_unlock_bh(&ift->lock); | |
845 | ||
846 | addrconf_dad_start(ift, 0); | |
847 | in6_ifa_put(ift); | |
848 | in6_dev_put(idev); | |
849 | out: | |
850 | return ret; | |
851 | } | |
852 | #endif | |
853 | ||
854 | /* | |
072047e4 | 855 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 856 | */ |
072047e4 YH |
857 | struct ipv6_saddr_score { |
858 | int addr_type; | |
859 | unsigned int attrs; | |
860 | int matchlen; | |
0d27b427 | 861 | int scope; |
072047e4 YH |
862 | unsigned int rule; |
863 | }; | |
864 | ||
865 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
866 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
867 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
868 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
869 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
870 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
871 | ||
872 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 873 | { |
072047e4 YH |
874 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
875 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
876 | return 1; | |
877 | return 0; | |
1da177e4 LT |
878 | } |
879 | ||
072047e4 YH |
880 | /* static matching label */ |
881 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
882 | { | |
883 | /* | |
884 | * prefix (longest match) label | |
885 | * ----------------------------- | |
886 | * ::1/128 0 | |
887 | * ::/0 1 | |
888 | * 2002::/16 2 | |
889 | * ::/96 3 | |
890 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
891 | * fc00::/7 5 |
892 | * 2001::/32 6 | |
072047e4 YH |
893 | */ |
894 | if (type & IPV6_ADDR_LOOPBACK) | |
895 | return 0; | |
896 | else if (type & IPV6_ADDR_COMPATv4) | |
897 | return 3; | |
898 | else if (type & IPV6_ADDR_MAPPED) | |
899 | return 4; | |
102128e3 ŁS |
900 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
901 | return 6; | |
072047e4 YH |
902 | else if (addr->s6_addr16[0] == htons(0x2002)) |
903 | return 2; | |
102128e3 ŁS |
904 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
905 | return 5; | |
072047e4 YH |
906 | return 1; |
907 | } | |
1da177e4 | 908 | |
072047e4 | 909 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
910 | struct in6_addr *daddr, struct in6_addr *saddr) |
911 | { | |
072047e4 YH |
912 | struct ipv6_saddr_score hiscore; |
913 | struct inet6_ifaddr *ifa_result = NULL; | |
914 | int daddr_type = __ipv6_addr_type(daddr); | |
915 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
916 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
917 | struct net_device *dev; | |
1da177e4 | 918 | |
072047e4 | 919 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 920 | |
072047e4 | 921 | read_lock(&dev_base_lock); |
8814c4b5 | 922 | rcu_read_lock(); |
1da177e4 | 923 | |
072047e4 YH |
924 | for (dev = dev_base; dev; dev=dev->next) { |
925 | struct inet6_dev *idev; | |
926 | struct inet6_ifaddr *ifa; | |
927 | ||
928 | /* Rule 0: Candidate Source Address (section 4) | |
929 | * - multicast and link-local destination address, | |
930 | * the set of candidate source address MUST only | |
931 | * include addresses assigned to interfaces | |
932 | * belonging to the same link as the outgoing | |
933 | * interface. | |
934 | * (- For site-local destination addresses, the | |
935 | * set of candidate source addresses MUST only | |
936 | * include addresses assigned to interfaces | |
937 | * belonging to the same site as the outgoing | |
938 | * interface.) | |
939 | */ | |
940 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
941 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
942 | daddr_dev && dev != daddr_dev) | |
943 | continue; | |
1da177e4 | 944 | |
1da177e4 | 945 | idev = __in6_dev_get(dev); |
072047e4 YH |
946 | if (!idev) |
947 | continue; | |
948 | ||
949 | read_lock_bh(&idev->lock); | |
950 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
951 | struct ipv6_saddr_score score; | |
952 | ||
953 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
954 | ||
6b3ae80a YH |
955 | /* Rule 0: |
956 | * - Tentative Address (RFC2462 section 5.4) | |
957 | * - A tentative address is not considered | |
958 | * "assigned to an interface" in the traditional | |
959 | * sense. | |
960 | * - Candidate Source Address (section 4) | |
072047e4 YH |
961 | * - In any case, anycast addresses, multicast |
962 | * addresses, and the unspecified address MUST | |
963 | * NOT be included in a candidate set. | |
964 | */ | |
6b3ae80a YH |
965 | if (ifa->flags & IFA_F_TENTATIVE) |
966 | continue; | |
072047e4 YH |
967 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
968 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
969 | LIMIT_NETDEBUG(KERN_DEBUG | |
970 | "ADDRCONF: unspecified / multicast address" | |
971 | "assigned as unicast address on %s", | |
972 | dev->name); | |
973 | continue; | |
974 | } | |
975 | ||
976 | score.attrs = 0; | |
977 | score.matchlen = 0; | |
978 | score.scope = 0; | |
979 | score.rule = 0; | |
980 | ||
981 | if (ifa_result == NULL) { | |
982 | /* record it if the first available entry */ | |
983 | goto record_it; | |
984 | } | |
985 | ||
986 | /* Rule 1: Prefer same address */ | |
987 | if (hiscore.rule < 1) { | |
988 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
989 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
990 | hiscore.rule++; | |
991 | } | |
992 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
993 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
994 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
995 | score.rule = 1; | |
996 | goto record_it; | |
1da177e4 | 997 | } |
072047e4 YH |
998 | } else { |
999 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
1000 | continue; | |
1da177e4 | 1001 | } |
1da177e4 | 1002 | |
072047e4 YH |
1003 | /* Rule 2: Prefer appropriate scope */ |
1004 | if (hiscore.rule < 2) { | |
1005 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
1006 | hiscore.rule++; | |
1007 | } | |
1008 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1009 | if (hiscore.scope < score.scope) { | |
1010 | if (hiscore.scope < daddr_scope) { | |
1011 | score.rule = 2; | |
1012 | goto record_it; | |
1013 | } else | |
1014 | continue; | |
1015 | } else if (score.scope < hiscore.scope) { | |
1016 | if (score.scope < daddr_scope) | |
e55ffac6 | 1017 | break; /* addresses sorted by scope */ |
072047e4 YH |
1018 | else { |
1019 | score.rule = 2; | |
1020 | goto record_it; | |
1021 | } | |
1022 | } | |
1da177e4 | 1023 | |
072047e4 YH |
1024 | /* Rule 3: Avoid deprecated address */ |
1025 | if (hiscore.rule < 3) { | |
1026 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
1027 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
1028 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1029 | hiscore.rule++; | |
1030 | } | |
1031 | if (ipv6_saddr_preferred(score.addr_type) || | |
1032 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
1033 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1034 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1035 | score.rule = 3; | |
1036 | goto record_it; | |
1037 | } | |
1038 | } else { | |
1039 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1040 | continue; | |
1041 | } | |
1da177e4 | 1042 | |
3b9f9a1c NT |
1043 | /* Rule 4: Prefer home address */ |
1044 | #ifdef CONFIG_IPV6_MIP6 | |
1045 | if (hiscore.rule < 4) { | |
1046 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1047 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1048 | hiscore.rule++; | |
1049 | } | |
1050 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1051 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1052 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1053 | score.rule = 4; | |
1054 | goto record_it; | |
1055 | } | |
1056 | } else { | |
1057 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1058 | continue; | |
1059 | } | |
1060 | #else | |
220bbd74 YH |
1061 | if (hiscore.rule < 4) |
1062 | hiscore.rule++; | |
3b9f9a1c | 1063 | #endif |
072047e4 YH |
1064 | |
1065 | /* Rule 5: Prefer outgoing interface */ | |
1066 | if (hiscore.rule < 5) { | |
1067 | if (daddr_dev == NULL || | |
1068 | daddr_dev == ifa_result->idev->dev) | |
1069 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1070 | hiscore.rule++; | |
1071 | } | |
1072 | if (daddr_dev == NULL || | |
1073 | daddr_dev == ifa->idev->dev) { | |
1074 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1075 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1076 | score.rule = 5; | |
1077 | goto record_it; | |
1078 | } | |
1079 | } else { | |
1080 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1081 | continue; | |
1082 | } | |
1083 | ||
1084 | /* Rule 6: Prefer matching label */ | |
1085 | if (hiscore.rule < 6) { | |
1086 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1087 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1088 | hiscore.rule++; | |
1089 | } | |
1090 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
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; | |
1157 | ||
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 | ||
1170 | ||
1171 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1172 | { | |
1173 | struct inet6_dev *idev; | |
1174 | int err = -EADDRNOTAVAIL; | |
1175 | ||
8814c4b5 | 1176 | rcu_read_lock(); |
1da177e4 LT |
1177 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1178 | struct inet6_ifaddr *ifp; | |
1179 | ||
1180 | read_lock_bh(&idev->lock); | |
1181 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1182 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1183 | ipv6_addr_copy(addr, &ifp->addr); | |
1184 | err = 0; | |
1185 | break; | |
1186 | } | |
1187 | } | |
1188 | read_unlock_bh(&idev->lock); | |
1189 | } | |
8814c4b5 | 1190 | rcu_read_unlock(); |
1da177e4 LT |
1191 | return err; |
1192 | } | |
1193 | ||
1194 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1195 | { | |
1196 | int cnt = 0; | |
1197 | struct inet6_ifaddr *ifp; | |
1198 | ||
1199 | read_lock_bh(&idev->lock); | |
1200 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1201 | cnt++; | |
1202 | read_unlock_bh(&idev->lock); | |
1203 | return cnt; | |
1204 | } | |
1205 | ||
1206 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1207 | { | |
1208 | struct inet6_ifaddr * ifp; | |
1209 | u8 hash = ipv6_addr_hash(addr); | |
1210 | ||
1211 | read_lock_bh(&addrconf_hash_lock); | |
1212 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1213 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1214 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1215 | if (dev == NULL || ifp->idev->dev == dev || | |
1216 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1217 | break; | |
1218 | } | |
1219 | } | |
1220 | read_unlock_bh(&addrconf_hash_lock); | |
1221 | return ifp != NULL; | |
1222 | } | |
1223 | ||
1224 | static | |
1225 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1226 | { | |
1227 | struct inet6_ifaddr * ifp; | |
1228 | u8 hash = ipv6_addr_hash(addr); | |
1229 | ||
1230 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1231 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1232 | if (dev == NULL || ifp->idev->dev == dev) | |
1233 | break; | |
1234 | } | |
1235 | } | |
1236 | return ifp != NULL; | |
1237 | } | |
1238 | ||
1239 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1240 | { | |
1241 | struct inet6_ifaddr * ifp; | |
1242 | u8 hash = ipv6_addr_hash(addr); | |
1243 | ||
1244 | read_lock_bh(&addrconf_hash_lock); | |
1245 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1246 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1247 | if (dev == NULL || ifp->idev->dev == dev || | |
1248 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1249 | in6_ifa_hold(ifp); | |
1250 | break; | |
1251 | } | |
1252 | } | |
1253 | } | |
1254 | read_unlock_bh(&addrconf_hash_lock); | |
1255 | ||
1256 | return ifp; | |
1257 | } | |
1258 | ||
1259 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1260 | { | |
1261 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1262 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1263 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1264 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1265 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1266 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1267 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1268 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1269 | ||
1270 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1271 | return 1; | |
1272 | ||
1273 | if (addr_type2 == IPV6_ADDR_ANY && | |
1274 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1275 | return 1; | |
1276 | ||
1277 | if (addr_type == IPV6_ADDR_ANY && | |
1278 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1279 | return 1; | |
1280 | ||
1281 | if (sk2_rcv_saddr6 && | |
1282 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1283 | return 1; | |
1284 | ||
1285 | if (addr_type == IPV6_ADDR_MAPPED && | |
1286 | !sk2_ipv6only && | |
1287 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1288 | return 1; | |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | /* Gets referenced address, destroys ifaddr */ | |
1294 | ||
9f5336e2 | 1295 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1296 | { |
1da177e4 LT |
1297 | if (ifp->flags&IFA_F_PERMANENT) { |
1298 | spin_lock_bh(&ifp->lock); | |
1299 | addrconf_del_timer(ifp); | |
1300 | ifp->flags |= IFA_F_TENTATIVE; | |
1301 | spin_unlock_bh(&ifp->lock); | |
1302 | in6_ifa_put(ifp); | |
1303 | #ifdef CONFIG_IPV6_PRIVACY | |
1304 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1305 | struct inet6_ifaddr *ifpub; | |
1306 | spin_lock_bh(&ifp->lock); | |
1307 | ifpub = ifp->ifpub; | |
1308 | if (ifpub) { | |
1309 | in6_ifa_hold(ifpub); | |
1310 | spin_unlock_bh(&ifp->lock); | |
1311 | ipv6_create_tempaddr(ifpub, ifp); | |
1312 | in6_ifa_put(ifpub); | |
1313 | } else { | |
1314 | spin_unlock_bh(&ifp->lock); | |
1315 | } | |
1316 | ipv6_del_addr(ifp); | |
1317 | #endif | |
1318 | } else | |
1319 | ipv6_del_addr(ifp); | |
1320 | } | |
1321 | ||
3c21edbd YH |
1322 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1323 | { | |
1324 | if (net_ratelimit()) | |
1325 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1326 | addrconf_dad_stop(ifp); | |
1327 | } | |
1da177e4 LT |
1328 | |
1329 | /* Join to solicited addr multicast group. */ | |
1330 | ||
1331 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1332 | { | |
1333 | struct in6_addr maddr; | |
1334 | ||
1335 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1336 | return; | |
1337 | ||
1338 | addrconf_addr_solict_mult(addr, &maddr); | |
1339 | ipv6_dev_mc_inc(dev, &maddr); | |
1340 | } | |
1341 | ||
1342 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1343 | { | |
1344 | struct in6_addr maddr; | |
1345 | ||
1346 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1347 | return; | |
1348 | ||
1349 | addrconf_addr_solict_mult(addr, &maddr); | |
1350 | __ipv6_dev_mc_dec(idev, &maddr); | |
1351 | } | |
1352 | ||
20380731 | 1353 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1354 | { |
1355 | struct in6_addr addr; | |
1356 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1357 | if (ipv6_addr_any(&addr)) | |
1358 | return; | |
1359 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1360 | } | |
1361 | ||
20380731 | 1362 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1363 | { |
1364 | struct in6_addr addr; | |
1365 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1366 | if (ipv6_addr_any(&addr)) | |
1367 | return; | |
1368 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1369 | } | |
1370 | ||
073a8e0e YH |
1371 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1372 | { | |
1373 | if (dev->addr_len != ETH_ALEN) | |
1374 | return -1; | |
1375 | memcpy(eui, dev->dev_addr, 3); | |
1376 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1377 | ||
1378 | /* | |
1379 | * The zSeries OSA network cards can be shared among various | |
1380 | * OS instances, but the OSA cards have only one MAC address. | |
1381 | * This leads to duplicate address conflicts in conjunction | |
1382 | * with IPv6 if more than one instance uses the same card. | |
1383 | * | |
1384 | * The driver for these cards can deliver a unique 16-bit | |
1385 | * identifier for each instance sharing the same card. It is | |
1386 | * placed instead of 0xFFFE in the interface identifier. The | |
1387 | * "u" bit of the interface identifier is not inverted in this | |
1388 | * case. Hence the resulting interface identifier has local | |
1389 | * scope according to RFC2373. | |
1390 | */ | |
1391 | if (dev->dev_id) { | |
1392 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1393 | eui[4] = dev->dev_id & 0xFF; | |
1394 | } else { | |
1395 | eui[3] = 0xFF; | |
1396 | eui[4] = 0xFE; | |
1397 | eui[0] ^= 2; | |
1398 | } | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1403 | { | |
1404 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1405 | if (dev->addr_len != ARCNET_ALEN) | |
1406 | return -1; | |
1407 | memset(eui, 0, 7); | |
1408 | eui[7] = *(u8*)dev->dev_addr; | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1413 | { | |
1414 | if (dev->addr_len != INFINIBAND_ALEN) | |
1415 | return -1; | |
1416 | memcpy(eui, dev->dev_addr + 12, 8); | |
1417 | eui[0] |= 2; | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1da177e4 LT |
1421 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1422 | { | |
1423 | switch (dev->type) { | |
1424 | case ARPHRD_ETHER: | |
1425 | case ARPHRD_FDDI: | |
1426 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1427 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1428 | case ARPHRD_ARCNET: |
073a8e0e | 1429 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1430 | case ARPHRD_INFINIBAND: |
073a8e0e | 1431 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1432 | } |
1433 | return -1; | |
1434 | } | |
1435 | ||
1436 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1437 | { | |
1438 | int err = -1; | |
1439 | struct inet6_ifaddr *ifp; | |
1440 | ||
1441 | read_lock_bh(&idev->lock); | |
1442 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1443 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1444 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1445 | err = 0; | |
1446 | break; | |
1447 | } | |
1448 | } | |
1449 | read_unlock_bh(&idev->lock); | |
1450 | return err; | |
1451 | } | |
1452 | ||
1453 | #ifdef CONFIG_IPV6_PRIVACY | |
1454 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1455 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1456 | { | |
1da177e4 | 1457 | regen: |
955189ef | 1458 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1459 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1460 | |
1461 | /* | |
1462 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1463 | * check if generated address is not inappropriate | |
1464 | * | |
1465 | * - Reserved subnet anycast (RFC 2526) | |
1466 | * 11111101 11....11 1xxxxxxx | |
1467 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1468 | * 00-00-5E-FE-xx-xx-xx-xx | |
1469 | * - value 0 | |
1470 | * - XXX: already assigned to an address on the device | |
1471 | */ | |
1472 | if (idev->rndid[0] == 0xfd && | |
1473 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && | |
1474 | (idev->rndid[7]&0x80)) | |
1475 | goto regen; | |
1476 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1477 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1478 | goto regen; | |
1479 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1480 | goto regen; | |
1481 | } | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | static void ipv6_regen_rndid(unsigned long data) | |
1487 | { | |
1488 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1489 | unsigned long expires; | |
1490 | ||
8814c4b5 | 1491 | rcu_read_lock_bh(); |
1da177e4 LT |
1492 | write_lock_bh(&idev->lock); |
1493 | ||
1494 | if (idev->dead) | |
1495 | goto out; | |
1496 | ||
1497 | if (__ipv6_regen_rndid(idev) < 0) | |
1498 | goto out; | |
1499 | ||
1500 | expires = jiffies + | |
1501 | idev->cnf.temp_prefered_lft * HZ - | |
1502 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; | |
1503 | if (time_before(expires, jiffies)) { | |
1504 | printk(KERN_WARNING | |
1505 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1506 | idev->dev->name); | |
1507 | goto out; | |
1508 | } | |
1509 | ||
1510 | if (!mod_timer(&idev->regen_timer, expires)) | |
1511 | in6_dev_hold(idev); | |
1512 | ||
1513 | out: | |
1514 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1515 | rcu_read_unlock_bh(); |
1da177e4 LT |
1516 | in6_dev_put(idev); |
1517 | } | |
1518 | ||
1519 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1520 | int ret = 0; | |
1521 | ||
1522 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1523 | ret = __ipv6_regen_rndid(idev); | |
1524 | return ret; | |
1525 | } | |
1526 | #endif | |
1527 | ||
1528 | /* | |
1529 | * Add prefix route. | |
1530 | */ | |
1531 | ||
1532 | static void | |
1533 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1534 | unsigned long expires, u32 flags) |
1da177e4 | 1535 | { |
86872cb5 TG |
1536 | struct fib6_config cfg = { |
1537 | .fc_table = RT6_TABLE_PREFIX, | |
1538 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1539 | .fc_ifindex = dev->ifindex, | |
1540 | .fc_expires = expires, | |
1541 | .fc_dst_len = plen, | |
1542 | .fc_flags = RTF_UP | flags, | |
1543 | }; | |
1da177e4 | 1544 | |
86872cb5 | 1545 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1546 | |
1547 | /* Prevent useless cloning on PtP SIT. | |
1548 | This thing is done here expecting that the whole | |
1549 | class of non-broadcast devices need not cloning. | |
1550 | */ | |
0be669bb | 1551 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1552 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1553 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1554 | #endif |
1da177e4 | 1555 | |
86872cb5 | 1556 | ip6_route_add(&cfg); |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | /* Create "default" multicast route to the interface */ | |
1560 | ||
1561 | static void addrconf_add_mroute(struct net_device *dev) | |
1562 | { | |
86872cb5 TG |
1563 | struct fib6_config cfg = { |
1564 | .fc_table = RT6_TABLE_LOCAL, | |
1565 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1566 | .fc_ifindex = dev->ifindex, | |
1567 | .fc_dst_len = 8, | |
1568 | .fc_flags = RTF_UP, | |
1569 | }; | |
1570 | ||
1571 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1572 | ||
1573 | ip6_route_add(&cfg); | |
1da177e4 LT |
1574 | } |
1575 | ||
0be669bb | 1576 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1577 | static void sit_route_add(struct net_device *dev) |
1578 | { | |
86872cb5 TG |
1579 | struct fib6_config cfg = { |
1580 | .fc_table = RT6_TABLE_MAIN, | |
1581 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1582 | .fc_ifindex = dev->ifindex, | |
1583 | .fc_dst_len = 96, | |
1584 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1585 | }; | |
1da177e4 LT |
1586 | |
1587 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1588 | ip6_route_add(&cfg); |
1da177e4 | 1589 | } |
0be669bb | 1590 | #endif |
1da177e4 LT |
1591 | |
1592 | static void addrconf_add_lroute(struct net_device *dev) | |
1593 | { | |
1594 | struct in6_addr addr; | |
1595 | ||
1596 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1597 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1598 | } | |
1599 | ||
1600 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1601 | { | |
1602 | struct inet6_dev *idev; | |
1603 | ||
1604 | ASSERT_RTNL(); | |
1605 | ||
1606 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1607 | return NULL; | |
1608 | ||
1609 | /* Add default multicast route */ | |
1610 | addrconf_add_mroute(dev); | |
1611 | ||
1612 | /* Add link local route */ | |
1613 | addrconf_add_lroute(dev); | |
1614 | return idev; | |
1615 | } | |
1616 | ||
1617 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1618 | { | |
1619 | struct prefix_info *pinfo; | |
1620 | __u32 valid_lft; | |
1621 | __u32 prefered_lft; | |
1622 | int addr_type; | |
1623 | unsigned long rt_expires; | |
1624 | struct inet6_dev *in6_dev; | |
1625 | ||
1626 | pinfo = (struct prefix_info *) opt; | |
1627 | ||
1628 | if (len < sizeof(struct prefix_info)) { | |
1629 | ADBG(("addrconf: prefix option too short\n")); | |
1630 | return; | |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * Validation checks ([ADDRCONF], page 19) | |
1635 | */ | |
1636 | ||
1637 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1638 | ||
1639 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1640 | return; | |
1641 | ||
1642 | valid_lft = ntohl(pinfo->valid); | |
1643 | prefered_lft = ntohl(pinfo->prefered); | |
1644 | ||
1645 | if (prefered_lft > valid_lft) { | |
1646 | if (net_ratelimit()) | |
1647 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1648 | return; | |
1649 | } | |
1650 | ||
1651 | in6_dev = in6_dev_get(dev); | |
1652 | ||
1653 | if (in6_dev == NULL) { | |
1654 | if (net_ratelimit()) | |
1655 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1656 | return; | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Two things going on here: | |
1661 | * 1) Add routes for on-link prefixes | |
1662 | * 2) Configure prefixes with the auto flag set | |
1663 | */ | |
1664 | ||
1665 | /* Avoid arithmetic overflow. Really, we could | |
1666 | save rt_expires in seconds, likely valid_lft, | |
1667 | but it would require division in fib gc, that it | |
1668 | not good. | |
1669 | */ | |
1670 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1671 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1672 | else |
3dd4bc68 YH |
1673 | rt_expires = valid_lft * HZ; |
1674 | ||
1675 | /* | |
1676 | * We convert this (in jiffies) to clock_t later. | |
1677 | * Avoid arithmetic overflow there as well. | |
1678 | * Overflow can happen only if HZ < USER_HZ. | |
1679 | */ | |
1680 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1681 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1682 | |
1683 | if (pinfo->onlink) { | |
1684 | struct rt6_info *rt; | |
1685 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1686 | ||
1687 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1688 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1689 | if (valid_lft == 0) { | |
e0a1ad73 | 1690 | ip6_del_rt(rt); |
1da177e4 LT |
1691 | rt = NULL; |
1692 | } else { | |
3dd4bc68 | 1693 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1694 | } |
1695 | } | |
1696 | } else if (valid_lft) { | |
1697 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1698 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1699 | } |
1700 | if (rt) | |
1701 | dst_release(&rt->u.dst); | |
1702 | } | |
1703 | ||
1704 | /* Try to figure out our local address for this prefix */ | |
1705 | ||
1706 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1707 | struct inet6_ifaddr * ifp; | |
1708 | struct in6_addr addr; | |
1709 | int create = 0, update_lft = 0; | |
1710 | ||
1711 | if (pinfo->prefix_len == 64) { | |
1712 | memcpy(&addr, &pinfo->prefix, 8); | |
1713 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1714 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1715 | in6_dev_put(in6_dev); | |
1716 | return; | |
1717 | } | |
1718 | goto ok; | |
1719 | } | |
1720 | if (net_ratelimit()) | |
1721 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1722 | pinfo->prefix_len); | |
1723 | in6_dev_put(in6_dev); | |
1724 | return; | |
1725 | ||
1726 | ok: | |
1727 | ||
1728 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1729 | ||
1730 | if (ifp == NULL && valid_lft) { | |
1731 | int max_addresses = in6_dev->cnf.max_addresses; | |
1732 | ||
1733 | /* Do not allow to create too much of autoconfigured | |
1734 | * addresses; this would be too easy way to crash kernel. | |
1735 | */ | |
1736 | if (!max_addresses || | |
1737 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1738 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1739 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1740 | ||
1741 | if (!ifp || IS_ERR(ifp)) { | |
1742 | in6_dev_put(in6_dev); | |
1743 | return; | |
1744 | } | |
1745 | ||
1746 | update_lft = create = 1; | |
1747 | ifp->cstamp = jiffies; | |
1748 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1749 | } | |
1750 | ||
1751 | if (ifp) { | |
1752 | int flags; | |
1753 | unsigned long now; | |
1754 | #ifdef CONFIG_IPV6_PRIVACY | |
1755 | struct inet6_ifaddr *ift; | |
1756 | #endif | |
1757 | u32 stored_lft; | |
1758 | ||
1759 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1760 | spin_lock(&ifp->lock); | |
1761 | now = jiffies; | |
1762 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1763 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1764 | else | |
1765 | stored_lft = 0; | |
1766 | if (!update_lft && stored_lft) { | |
1767 | if (valid_lft > MIN_VALID_LIFETIME || | |
1768 | valid_lft > stored_lft) | |
1769 | update_lft = 1; | |
1770 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1771 | /* valid_lft <= stored_lft is always true */ | |
1772 | /* XXX: IPsec */ | |
1773 | update_lft = 0; | |
1774 | } else { | |
1775 | valid_lft = MIN_VALID_LIFETIME; | |
1776 | if (valid_lft < prefered_lft) | |
1777 | prefered_lft = valid_lft; | |
1778 | update_lft = 1; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | if (update_lft) { | |
1783 | ifp->valid_lft = valid_lft; | |
1784 | ifp->prefered_lft = prefered_lft; | |
1785 | ifp->tstamp = now; | |
1786 | flags = ifp->flags; | |
1787 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1788 | spin_unlock(&ifp->lock); | |
1789 | ||
1790 | if (!(flags&IFA_F_TENTATIVE)) | |
1791 | ipv6_ifa_notify(0, ifp); | |
1792 | } else | |
1793 | spin_unlock(&ifp->lock); | |
1794 | ||
1795 | #ifdef CONFIG_IPV6_PRIVACY | |
1796 | read_lock_bh(&in6_dev->lock); | |
1797 | /* update all temporary addresses in the list */ | |
1798 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1799 | /* | |
1800 | * When adjusting the lifetimes of an existing | |
1801 | * temporary address, only lower the lifetimes. | |
1802 | * Implementations must not increase the | |
1803 | * lifetimes of an existing temporary address | |
1804 | * when processing a Prefix Information Option. | |
1805 | */ | |
1806 | spin_lock(&ift->lock); | |
1807 | flags = ift->flags; | |
1808 | if (ift->valid_lft > valid_lft && | |
1809 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1810 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1811 | if (ift->prefered_lft > prefered_lft && | |
1812 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1813 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1814 | spin_unlock(&ift->lock); | |
1815 | if (!(flags&IFA_F_TENTATIVE)) | |
1816 | ipv6_ifa_notify(0, ift); | |
1817 | } | |
1818 | ||
1819 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1820 | /* | |
1821 | * When a new public address is created as described in [ADDRCONF], | |
1822 | * also create a new temporary address. | |
1823 | */ | |
1824 | read_unlock_bh(&in6_dev->lock); | |
1825 | ipv6_create_tempaddr(ifp, NULL); | |
1826 | } else { | |
1827 | read_unlock_bh(&in6_dev->lock); | |
1828 | } | |
1829 | #endif | |
1830 | in6_ifa_put(ifp); | |
1831 | addrconf_verify(0); | |
1832 | } | |
1833 | } | |
1834 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1835 | in6_dev_put(in6_dev); | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * Set destination address. | |
1840 | * Special case for SIT interfaces where we create a new "virtual" | |
1841 | * device. | |
1842 | */ | |
1843 | int addrconf_set_dstaddr(void __user *arg) | |
1844 | { | |
1845 | struct in6_ifreq ireq; | |
1846 | struct net_device *dev; | |
1847 | int err = -EINVAL; | |
1848 | ||
1849 | rtnl_lock(); | |
1850 | ||
1851 | err = -EFAULT; | |
1852 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1853 | goto err_exit; | |
1854 | ||
1855 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1856 | ||
1857 | err = -ENODEV; | |
1858 | if (dev == NULL) | |
1859 | goto err_exit; | |
1860 | ||
0be669bb | 1861 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1862 | if (dev->type == ARPHRD_SIT) { |
1863 | struct ifreq ifr; | |
1864 | mm_segment_t oldfs; | |
1865 | struct ip_tunnel_parm p; | |
1866 | ||
1867 | err = -EADDRNOTAVAIL; | |
1868 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1869 | goto err_exit; | |
1870 | ||
1871 | memset(&p, 0, sizeof(p)); | |
1872 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1873 | p.iph.saddr = 0; | |
1874 | p.iph.version = 4; | |
1875 | p.iph.ihl = 5; | |
1876 | p.iph.protocol = IPPROTO_IPV6; | |
1877 | p.iph.ttl = 64; | |
1878 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1879 | ||
1880 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1881 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1882 | set_fs(oldfs); | |
1883 | ||
1884 | if (err == 0) { | |
1885 | err = -ENOBUFS; | |
1886 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1887 | goto err_exit; | |
1888 | err = dev_open(dev); | |
1889 | } | |
1890 | } | |
0be669bb | 1891 | #endif |
1da177e4 LT |
1892 | |
1893 | err_exit: | |
1894 | rtnl_unlock(); | |
1895 | return err; | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * Manual configuration of address on an interface | |
1900 | */ | |
0778769d | 1901 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1902 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1903 | { |
1904 | struct inet6_ifaddr *ifp; | |
1905 | struct inet6_dev *idev; | |
1906 | struct net_device *dev; | |
1907 | int scope; | |
1908 | ||
1909 | ASSERT_RTNL(); | |
1910 | ||
0778769d NT |
1911 | /* check the lifetime */ |
1912 | if (!valid_lft || prefered_lft > valid_lft) | |
1913 | return -EINVAL; | |
1914 | ||
1da177e4 LT |
1915 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1916 | return -ENODEV; | |
1917 | ||
1da177e4 LT |
1918 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1919 | return -ENOBUFS; | |
1920 | ||
1921 | scope = ipv6_addr_scope(pfx); | |
1922 | ||
0778769d NT |
1923 | if (valid_lft == INFINITY_LIFE_TIME) |
1924 | ifa_flags |= IFA_F_PERMANENT; | |
1925 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
1926 | valid_lft = 0x7FFFFFFF/HZ; | |
1927 | ||
1928 | if (prefered_lft == 0) | |
1929 | ifa_flags |= IFA_F_DEPRECATED; | |
1930 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1931 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1932 | prefered_lft = 0x7FFFFFFF/HZ; | |
1933 | ||
1934 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1935 | ||
1da177e4 | 1936 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1937 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1938 | ifp->valid_lft = valid_lft; |
1939 | ifp->prefered_lft = prefered_lft; | |
1940 | ifp->tstamp = jiffies; | |
06aebfb7 | 1941 | spin_unlock_bh(&ifp->lock); |
0778769d | 1942 | |
1da177e4 LT |
1943 | addrconf_dad_start(ifp, 0); |
1944 | in6_ifa_put(ifp); | |
0778769d | 1945 | addrconf_verify(0); |
1da177e4 LT |
1946 | return 0; |
1947 | } | |
1948 | ||
1949 | return PTR_ERR(ifp); | |
1950 | } | |
1951 | ||
1952 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1953 | { | |
1954 | struct inet6_ifaddr *ifp; | |
1955 | struct inet6_dev *idev; | |
1956 | struct net_device *dev; | |
1957 | ||
1958 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1959 | return -ENODEV; | |
1960 | ||
1961 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1962 | return -ENXIO; | |
1963 | ||
1964 | read_lock_bh(&idev->lock); | |
1965 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1966 | if (ifp->prefix_len == plen && | |
1967 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1968 | in6_ifa_hold(ifp); | |
1969 | read_unlock_bh(&idev->lock); | |
1970 | ||
1971 | ipv6_del_addr(ifp); | |
1972 | ||
1973 | /* If the last address is deleted administratively, | |
1974 | disable IPv6 on this interface. | |
1975 | */ | |
1976 | if (idev->addr_list == NULL) | |
1977 | addrconf_ifdown(idev->dev, 1); | |
1978 | return 0; | |
1979 | } | |
1980 | } | |
1981 | read_unlock_bh(&idev->lock); | |
1982 | return -EADDRNOTAVAIL; | |
1983 | } | |
1984 | ||
1985 | ||
1986 | int addrconf_add_ifaddr(void __user *arg) | |
1987 | { | |
1988 | struct in6_ifreq ireq; | |
1989 | int err; | |
1990 | ||
1991 | if (!capable(CAP_NET_ADMIN)) | |
1992 | return -EPERM; | |
1993 | ||
1994 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1995 | return -EFAULT; | |
1996 | ||
1997 | rtnl_lock(); | |
0778769d | 1998 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 1999 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
2000 | rtnl_unlock(); |
2001 | return err; | |
2002 | } | |
2003 | ||
2004 | int addrconf_del_ifaddr(void __user *arg) | |
2005 | { | |
2006 | struct in6_ifreq ireq; | |
2007 | int err; | |
2008 | ||
2009 | if (!capable(CAP_NET_ADMIN)) | |
2010 | return -EPERM; | |
2011 | ||
2012 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2013 | return -EFAULT; | |
2014 | ||
2015 | rtnl_lock(); | |
2016 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2017 | rtnl_unlock(); | |
2018 | return err; | |
2019 | } | |
2020 | ||
0be669bb | 2021 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2022 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2023 | { | |
2024 | struct inet6_ifaddr * ifp; | |
2025 | struct in6_addr addr; | |
2026 | struct net_device *dev; | |
2027 | int scope; | |
2028 | ||
2029 | ASSERT_RTNL(); | |
2030 | ||
2031 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2032 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2033 | ||
2034 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2035 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2036 | scope = IFA_LINK; | |
2037 | } else { | |
2038 | scope = IPV6_ADDR_COMPATv4; | |
2039 | } | |
2040 | ||
2041 | if (addr.s6_addr32[3]) { | |
2042 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2043 | if (!IS_ERR(ifp)) { | |
2044 | spin_lock_bh(&ifp->lock); | |
2045 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2046 | spin_unlock_bh(&ifp->lock); | |
2047 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2048 | in6_ifa_put(ifp); | |
2049 | } | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | for (dev = dev_base; dev != NULL; dev = dev->next) { | |
e5ed6399 | 2054 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2055 | if (in_dev && (dev->flags & IFF_UP)) { |
2056 | struct in_ifaddr * ifa; | |
2057 | ||
2058 | int flag = scope; | |
2059 | ||
2060 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2061 | int plen; | |
2062 | ||
2063 | addr.s6_addr32[3] = ifa->ifa_local; | |
2064 | ||
2065 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2066 | continue; | |
2067 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2068 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2069 | continue; | |
2070 | flag |= IFA_HOST; | |
2071 | } | |
2072 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2073 | plen = 64; | |
2074 | else | |
2075 | plen = 96; | |
2076 | ||
2077 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2078 | IFA_F_PERMANENT); | |
2079 | if (!IS_ERR(ifp)) { | |
2080 | spin_lock_bh(&ifp->lock); | |
2081 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2082 | spin_unlock_bh(&ifp->lock); | |
2083 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2084 | in6_ifa_put(ifp); | |
2085 | } | |
2086 | } | |
2087 | } | |
2088 | } | |
2089 | } | |
0be669bb | 2090 | #endif |
1da177e4 LT |
2091 | |
2092 | static void init_loopback(struct net_device *dev) | |
2093 | { | |
2094 | struct inet6_dev *idev; | |
2095 | struct inet6_ifaddr * ifp; | |
2096 | ||
2097 | /* ::1 */ | |
2098 | ||
2099 | ASSERT_RTNL(); | |
2100 | ||
2101 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2102 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2103 | return; | |
2104 | } | |
2105 | ||
2106 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2107 | if (!IS_ERR(ifp)) { | |
2108 | spin_lock_bh(&ifp->lock); | |
2109 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2110 | spin_unlock_bh(&ifp->lock); | |
2111 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2112 | in6_ifa_put(ifp); | |
2113 | } | |
2114 | } | |
2115 | ||
2116 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2117 | { | |
2118 | struct inet6_ifaddr * ifp; | |
2119 | ||
2120 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2121 | if (!IS_ERR(ifp)) { | |
2122 | addrconf_dad_start(ifp, 0); | |
2123 | in6_ifa_put(ifp); | |
2124 | } | |
2125 | } | |
2126 | ||
2127 | static void addrconf_dev_config(struct net_device *dev) | |
2128 | { | |
2129 | struct in6_addr addr; | |
2130 | struct inet6_dev * idev; | |
2131 | ||
2132 | ASSERT_RTNL(); | |
2133 | ||
2134 | if ((dev->type != ARPHRD_ETHER) && | |
2135 | (dev->type != ARPHRD_FDDI) && | |
2136 | (dev->type != ARPHRD_IEEE802_TR) && | |
2137 | (dev->type != ARPHRD_ARCNET) && | |
2138 | (dev->type != ARPHRD_INFINIBAND)) { | |
2139 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2140 | return; | |
2141 | } | |
2142 | ||
2143 | idev = addrconf_add_dev(dev); | |
2144 | if (idev == NULL) | |
2145 | return; | |
2146 | ||
2147 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2148 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2149 | ||
2150 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2151 | addrconf_add_linklocal(idev, &addr); | |
2152 | } | |
2153 | ||
0be669bb | 2154 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2155 | static void addrconf_sit_config(struct net_device *dev) |
2156 | { | |
2157 | struct inet6_dev *idev; | |
2158 | ||
2159 | ASSERT_RTNL(); | |
2160 | ||
2161 | /* | |
2162 | * Configure the tunnel with one of our IPv4 | |
2163 | * addresses... we should configure all of | |
2164 | * our v4 addrs in the tunnel | |
2165 | */ | |
2166 | ||
2167 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2168 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2169 | return; | |
2170 | } | |
2171 | ||
2172 | sit_add_v4_addrs(idev); | |
2173 | ||
2174 | if (dev->flags&IFF_POINTOPOINT) { | |
2175 | addrconf_add_mroute(dev); | |
2176 | addrconf_add_lroute(dev); | |
2177 | } else | |
2178 | sit_route_add(dev); | |
2179 | } | |
0be669bb | 2180 | #endif |
1da177e4 LT |
2181 | |
2182 | static inline int | |
2183 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2184 | { | |
2185 | struct in6_addr lladdr; | |
2186 | ||
2187 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2188 | addrconf_add_linklocal(idev, &lladdr); | |
2189 | return 0; | |
2190 | } | |
2191 | return -1; | |
2192 | } | |
2193 | ||
2194 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2195 | { | |
2196 | struct net_device *link_dev; | |
2197 | ||
2198 | /* first try to inherit the link-local address from the link device */ | |
2199 | if (idev->dev->iflink && | |
2200 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2201 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2202 | return; | |
2203 | } | |
2204 | /* then try to inherit it from any device */ | |
2205 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2206 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2207 | return; | |
2208 | } | |
2209 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2210 | } | |
2211 | ||
2212 | /* | |
2213 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2214 | * DHCPv6, MLD etc. can be run over the virtual link | |
2215 | */ | |
2216 | ||
2217 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2218 | { | |
2219 | struct inet6_dev *idev; | |
2220 | ||
2221 | ASSERT_RTNL(); | |
2222 | ||
2223 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2224 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2225 | return; | |
2226 | } | |
2227 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2228 | } |
2229 | ||
2230 | static int addrconf_notify(struct notifier_block *this, unsigned long event, | |
2231 | void * data) | |
2232 | { | |
2233 | struct net_device *dev = (struct net_device *) data; | |
2234 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2235 | int run_pending = 0; |
1da177e4 LT |
2236 | |
2237 | switch(event) { | |
2238 | case NETDEV_UP: | |
3c21edbd YH |
2239 | case NETDEV_CHANGE: |
2240 | if (event == NETDEV_UP) { | |
2241 | if (!netif_carrier_ok(dev)) { | |
2242 | /* device is not ready yet. */ | |
2243 | printk(KERN_INFO | |
2244 | "ADDRCONF(NETDEV_UP): %s: " | |
2245 | "link is not ready\n", | |
2246 | dev->name); | |
2247 | break; | |
2248 | } | |
99081049 KS |
2249 | |
2250 | if (idev) | |
2251 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2252 | } else { |
2253 | if (!netif_carrier_ok(dev)) { | |
2254 | /* device is still not ready. */ | |
2255 | break; | |
2256 | } | |
2257 | ||
2258 | if (idev) { | |
2259 | if (idev->if_flags & IF_READY) { | |
2260 | /* device is already configured. */ | |
2261 | break; | |
2262 | } | |
2263 | idev->if_flags |= IF_READY; | |
2264 | } | |
2265 | ||
2266 | printk(KERN_INFO | |
2267 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2268 | "link becomes ready\n", | |
2269 | dev->name); | |
2270 | ||
c5e33bdd | 2271 | run_pending = 1; |
3c21edbd YH |
2272 | } |
2273 | ||
1da177e4 | 2274 | switch(dev->type) { |
0be669bb | 2275 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2276 | case ARPHRD_SIT: |
2277 | addrconf_sit_config(dev); | |
2278 | break; | |
0be669bb | 2279 | #endif |
1da177e4 LT |
2280 | case ARPHRD_TUNNEL6: |
2281 | addrconf_ip6_tnl_config(dev); | |
2282 | break; | |
2283 | case ARPHRD_LOOPBACK: | |
2284 | init_loopback(dev); | |
2285 | break; | |
2286 | ||
2287 | default: | |
2288 | addrconf_dev_config(dev); | |
2289 | break; | |
2290 | }; | |
2291 | if (idev) { | |
c5e33bdd YH |
2292 | if (run_pending) |
2293 | addrconf_dad_run(idev); | |
2294 | ||
1da177e4 LT |
2295 | /* If the MTU changed during the interface down, when the |
2296 | interface up, the changed MTU must be reflected in the | |
2297 | idev as well as routers. | |
2298 | */ | |
2299 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2300 | rt6_mtu_change(dev, dev->mtu); | |
2301 | idev->cnf.mtu6 = dev->mtu; | |
2302 | } | |
2303 | idev->tstamp = jiffies; | |
2304 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2305 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2306 | stop IPv6 on this interface. | |
2307 | */ | |
2308 | if (dev->mtu < IPV6_MIN_MTU) | |
2309 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2310 | } | |
2311 | break; | |
2312 | ||
2313 | case NETDEV_CHANGEMTU: | |
2314 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2315 | rt6_mtu_change(dev, dev->mtu); | |
2316 | idev->cnf.mtu6 = dev->mtu; | |
2317 | break; | |
2318 | } | |
2319 | ||
2320 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2321 | ||
2322 | case NETDEV_DOWN: | |
2323 | case NETDEV_UNREGISTER: | |
2324 | /* | |
2325 | * Remove all addresses from this interface. | |
2326 | */ | |
2327 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2328 | break; | |
3c21edbd | 2329 | |
1da177e4 LT |
2330 | case NETDEV_CHANGENAME: |
2331 | #ifdef CONFIG_SYSCTL | |
2332 | if (idev) { | |
2333 | addrconf_sysctl_unregister(&idev->cnf); | |
2334 | neigh_sysctl_unregister(idev->nd_parms); | |
2335 | neigh_sysctl_register(dev, idev->nd_parms, | |
2336 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2337 | &ndisc_ifinfo_sysctl_change, | |
2338 | NULL); | |
2339 | addrconf_sysctl_register(idev, &idev->cnf); | |
2340 | } | |
2341 | #endif | |
2342 | break; | |
2343 | }; | |
2344 | ||
2345 | return NOTIFY_OK; | |
2346 | } | |
2347 | ||
2348 | /* | |
2349 | * addrconf module should be notified of a device going up | |
2350 | */ | |
2351 | static struct notifier_block ipv6_dev_notf = { | |
2352 | .notifier_call = addrconf_notify, | |
2353 | .priority = 0 | |
2354 | }; | |
2355 | ||
2356 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2357 | { | |
2358 | struct inet6_dev *idev; | |
2359 | struct inet6_ifaddr *ifa, **bifa; | |
2360 | int i; | |
2361 | ||
2362 | ASSERT_RTNL(); | |
2363 | ||
2364 | if (dev == &loopback_dev && how == 1) | |
2365 | how = 0; | |
2366 | ||
2367 | rt6_ifdown(dev); | |
2368 | neigh_ifdown(&nd_tbl, dev); | |
2369 | ||
2370 | idev = __in6_dev_get(dev); | |
2371 | if (idev == NULL) | |
2372 | return -ENODEV; | |
2373 | ||
2374 | /* Step 1: remove reference to ipv6 device from parent device. | |
2375 | Do not dev_put! | |
2376 | */ | |
2377 | if (how == 1) { | |
1da177e4 | 2378 | idev->dead = 1; |
8814c4b5 YH |
2379 | |
2380 | /* protected by rtnl_lock */ | |
2381 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2382 | |
2383 | /* Step 1.5: remove snmp6 entry */ | |
2384 | snmp6_unregister_dev(idev); | |
2385 | ||
2386 | } | |
2387 | ||
2388 | /* Step 2: clear hash table */ | |
2389 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2390 | bifa = &inet6_addr_lst[i]; | |
2391 | ||
2392 | write_lock_bh(&addrconf_hash_lock); | |
2393 | while ((ifa = *bifa) != NULL) { | |
2394 | if (ifa->idev == idev) { | |
2395 | *bifa = ifa->lst_next; | |
2396 | ifa->lst_next = NULL; | |
2397 | addrconf_del_timer(ifa); | |
2398 | in6_ifa_put(ifa); | |
2399 | continue; | |
2400 | } | |
2401 | bifa = &ifa->lst_next; | |
2402 | } | |
2403 | write_unlock_bh(&addrconf_hash_lock); | |
2404 | } | |
2405 | ||
2406 | write_lock_bh(&idev->lock); | |
2407 | ||
2408 | /* Step 3: clear flags for stateless addrconf */ | |
2409 | if (how != 1) | |
3c21edbd | 2410 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2411 | |
2412 | /* Step 4: clear address list */ | |
2413 | #ifdef CONFIG_IPV6_PRIVACY | |
2414 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2415 | in6_dev_put(idev); | |
2416 | ||
2417 | /* clear tempaddr list */ | |
2418 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2419 | idev->tempaddr_list = ifa->tmp_next; | |
2420 | ifa->tmp_next = NULL; | |
2421 | ifa->dead = 1; | |
2422 | write_unlock_bh(&idev->lock); | |
2423 | spin_lock_bh(&ifa->lock); | |
2424 | ||
2425 | if (ifa->ifpub) { | |
2426 | in6_ifa_put(ifa->ifpub); | |
2427 | ifa->ifpub = NULL; | |
2428 | } | |
2429 | spin_unlock_bh(&ifa->lock); | |
2430 | in6_ifa_put(ifa); | |
2431 | write_lock_bh(&idev->lock); | |
2432 | } | |
2433 | #endif | |
2434 | while ((ifa = idev->addr_list) != NULL) { | |
2435 | idev->addr_list = ifa->if_next; | |
2436 | ifa->if_next = NULL; | |
2437 | ifa->dead = 1; | |
2438 | addrconf_del_timer(ifa); | |
2439 | write_unlock_bh(&idev->lock); | |
2440 | ||
2441 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2442 | in6_ifa_put(ifa); | |
2443 | ||
2444 | write_lock_bh(&idev->lock); | |
2445 | } | |
2446 | write_unlock_bh(&idev->lock); | |
2447 | ||
2448 | /* Step 5: Discard multicast list */ | |
2449 | ||
2450 | if (how == 1) | |
2451 | ipv6_mc_destroy_dev(idev); | |
2452 | else | |
2453 | ipv6_mc_down(idev); | |
2454 | ||
2455 | /* Step 5: netlink notification of this interface */ | |
2456 | idev->tstamp = jiffies; | |
979ad663 | 2457 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1da177e4 LT |
2458 | |
2459 | /* Shot the device (if unregistered) */ | |
2460 | ||
2461 | if (how == 1) { | |
2462 | #ifdef CONFIG_SYSCTL | |
2463 | addrconf_sysctl_unregister(&idev->cnf); | |
2464 | neigh_sysctl_unregister(idev->nd_parms); | |
2465 | #endif | |
2466 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2467 | neigh_ifdown(&nd_tbl, dev); | |
2468 | in6_dev_put(idev); | |
2469 | } | |
2470 | return 0; | |
2471 | } | |
2472 | ||
2473 | static void addrconf_rs_timer(unsigned long data) | |
2474 | { | |
2475 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2476 | ||
2477 | if (ifp->idev->cnf.forwarding) | |
2478 | goto out; | |
2479 | ||
2480 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2481 | /* | |
2482 | * Announcement received after solicitation | |
2483 | * was sent | |
2484 | */ | |
2485 | goto out; | |
2486 | } | |
2487 | ||
2488 | spin_lock(&ifp->lock); | |
2489 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2490 | struct in6_addr all_routers; | |
2491 | ||
2492 | /* The wait after the last probe can be shorter */ | |
2493 | addrconf_mod_timer(ifp, AC_RS, | |
2494 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2495 | ifp->idev->cnf.rtr_solicit_delay : | |
2496 | ifp->idev->cnf.rtr_solicit_interval); | |
2497 | spin_unlock(&ifp->lock); | |
2498 | ||
2499 | ipv6_addr_all_routers(&all_routers); | |
2500 | ||
2501 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2502 | } else { | |
2503 | spin_unlock(&ifp->lock); | |
2504 | /* | |
2505 | * Note: we do not support deprecated "all on-link" | |
2506 | * assumption any longer. | |
2507 | */ | |
2508 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2509 | ifp->idev->dev->name); | |
2510 | } | |
2511 | ||
2512 | out: | |
2513 | in6_ifa_put(ifp); | |
2514 | } | |
2515 | ||
2516 | /* | |
2517 | * Duplicate Address Detection | |
2518 | */ | |
3c21edbd YH |
2519 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2520 | { | |
2521 | unsigned long rand_num; | |
2522 | struct inet6_dev *idev = ifp->idev; | |
2523 | ||
2524 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2525 | ifp->probes = idev->cnf.dad_transmits; | |
2526 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2527 | } | |
2528 | ||
e431b8c0 | 2529 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2530 | { |
2531 | struct inet6_dev *idev = ifp->idev; | |
2532 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2533 | |
2534 | addrconf_join_solict(dev, &ifp->addr); | |
2535 | ||
2536 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2537 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2538 | flags); | |
2539 | ||
2540 | net_srandom(ifp->addr.s6_addr32[3]); | |
1da177e4 LT |
2541 | |
2542 | read_lock_bh(&idev->lock); | |
2543 | if (ifp->dead) | |
2544 | goto out; | |
2545 | spin_lock_bh(&ifp->lock); | |
2546 | ||
2547 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2548 | !(ifp->flags&IFA_F_TENTATIVE) || |
2549 | ifp->flags & IFA_F_NODAD) { | |
1da177e4 LT |
2550 | ifp->flags &= ~IFA_F_TENTATIVE; |
2551 | spin_unlock_bh(&ifp->lock); | |
2552 | read_unlock_bh(&idev->lock); | |
2553 | ||
2554 | addrconf_dad_completed(ifp); | |
2555 | return; | |
2556 | } | |
2557 | ||
6732bade | 2558 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2559 | spin_unlock_bh(&ifp->lock); |
6732bade | 2560 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2561 | /* |
2562 | * If the defice is not ready: | |
2563 | * - keep it tentative if it is a permanent address. | |
2564 | * - otherwise, kill it. | |
2565 | */ | |
2566 | in6_ifa_hold(ifp); | |
2567 | addrconf_dad_stop(ifp); | |
6732bade | 2568 | return; |
3c21edbd | 2569 | } |
6732bade YH |
2570 | addrconf_dad_kick(ifp); |
2571 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2572 | out: |
2573 | read_unlock_bh(&idev->lock); | |
2574 | } | |
2575 | ||
2576 | static void addrconf_dad_timer(unsigned long data) | |
2577 | { | |
2578 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2579 | struct inet6_dev *idev = ifp->idev; | |
2580 | struct in6_addr unspec; | |
2581 | struct in6_addr mcaddr; | |
2582 | ||
2583 | read_lock_bh(&idev->lock); | |
2584 | if (idev->dead) { | |
2585 | read_unlock_bh(&idev->lock); | |
2586 | goto out; | |
2587 | } | |
2588 | spin_lock_bh(&ifp->lock); | |
2589 | if (ifp->probes == 0) { | |
2590 | /* | |
2591 | * DAD was successful | |
2592 | */ | |
2593 | ||
2594 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2595 | spin_unlock_bh(&ifp->lock); | |
2596 | read_unlock_bh(&idev->lock); | |
2597 | ||
2598 | addrconf_dad_completed(ifp); | |
2599 | ||
2600 | goto out; | |
2601 | } | |
2602 | ||
2603 | ifp->probes--; | |
2604 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2605 | spin_unlock_bh(&ifp->lock); | |
2606 | read_unlock_bh(&idev->lock); | |
2607 | ||
2608 | /* send a neighbour solicitation for our addr */ | |
2609 | memset(&unspec, 0, sizeof(unspec)); | |
2610 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2611 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2612 | out: | |
2613 | in6_ifa_put(ifp); | |
2614 | } | |
2615 | ||
2616 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2617 | { | |
2618 | struct net_device * dev = ifp->idev->dev; | |
2619 | ||
2620 | /* | |
2621 | * Configure the address for reception. Now it is valid. | |
2622 | */ | |
2623 | ||
2624 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2625 | ||
2626 | /* If added prefix is link local and forwarding is off, | |
2627 | start sending router solicitations. | |
2628 | */ | |
2629 | ||
2630 | if (ifp->idev->cnf.forwarding == 0 && | |
2631 | ifp->idev->cnf.rtr_solicits > 0 && | |
2632 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2633 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2634 | struct in6_addr all_routers; | |
2635 | ||
2636 | ipv6_addr_all_routers(&all_routers); | |
2637 | ||
2638 | /* | |
2639 | * If a host as already performed a random delay | |
2640 | * [...] as part of DAD [...] there is no need | |
2641 | * to delay again before sending the first RS | |
2642 | */ | |
2643 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2644 | ||
2645 | spin_lock_bh(&ifp->lock); | |
2646 | ifp->probes = 1; | |
2647 | ifp->idev->if_flags |= IF_RS_SENT; | |
2648 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2649 | spin_unlock_bh(&ifp->lock); | |
2650 | } | |
2651 | } | |
2652 | ||
c5e33bdd YH |
2653 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2654 | struct inet6_ifaddr *ifp; | |
2655 | ||
2656 | read_lock_bh(&idev->lock); | |
2657 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2658 | spin_lock_bh(&ifp->lock); | |
2659 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2660 | spin_unlock_bh(&ifp->lock); | |
2661 | continue; | |
2662 | } | |
2663 | spin_unlock_bh(&ifp->lock); | |
2664 | addrconf_dad_kick(ifp); | |
2665 | } | |
2666 | read_unlock_bh(&idev->lock); | |
2667 | } | |
2668 | ||
1da177e4 LT |
2669 | #ifdef CONFIG_PROC_FS |
2670 | struct if6_iter_state { | |
2671 | int bucket; | |
2672 | }; | |
2673 | ||
2674 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2675 | { | |
2676 | struct inet6_ifaddr *ifa = NULL; | |
2677 | struct if6_iter_state *state = seq->private; | |
2678 | ||
2679 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2680 | ifa = inet6_addr_lst[state->bucket]; | |
2681 | if (ifa) | |
2682 | break; | |
2683 | } | |
2684 | return ifa; | |
2685 | } | |
2686 | ||
2687 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2688 | { | |
2689 | struct if6_iter_state *state = seq->private; | |
2690 | ||
2691 | ifa = ifa->lst_next; | |
2692 | try_again: | |
2693 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2694 | ifa = inet6_addr_lst[state->bucket]; | |
2695 | goto try_again; | |
2696 | } | |
2697 | return ifa; | |
2698 | } | |
2699 | ||
2700 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2701 | { | |
2702 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2703 | ||
2704 | if (ifa) | |
2705 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2706 | --pos; | |
2707 | return pos ? NULL : ifa; | |
2708 | } | |
2709 | ||
2710 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2711 | { | |
2712 | read_lock_bh(&addrconf_hash_lock); | |
2713 | return if6_get_idx(seq, *pos); | |
2714 | } | |
2715 | ||
2716 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2717 | { | |
2718 | struct inet6_ifaddr *ifa; | |
2719 | ||
2720 | ifa = if6_get_next(seq, v); | |
2721 | ++*pos; | |
2722 | return ifa; | |
2723 | } | |
2724 | ||
2725 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2726 | { | |
2727 | read_unlock_bh(&addrconf_hash_lock); | |
2728 | } | |
2729 | ||
2730 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2731 | { | |
2732 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2733 | seq_printf(seq, | |
9343e79a | 2734 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2735 | NIP6(ifp->addr), |
2736 | ifp->idev->dev->ifindex, | |
2737 | ifp->prefix_len, | |
2738 | ifp->scope, | |
2739 | ifp->flags, | |
2740 | ifp->idev->dev->name); | |
2741 | return 0; | |
2742 | } | |
2743 | ||
2744 | static struct seq_operations if6_seq_ops = { | |
2745 | .start = if6_seq_start, | |
2746 | .next = if6_seq_next, | |
2747 | .show = if6_seq_show, | |
2748 | .stop = if6_seq_stop, | |
2749 | }; | |
2750 | ||
2751 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2752 | { | |
2753 | struct seq_file *seq; | |
2754 | int rc = -ENOMEM; | |
322f74a4 | 2755 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2756 | |
2757 | if (!s) | |
2758 | goto out; | |
1da177e4 LT |
2759 | |
2760 | rc = seq_open(file, &if6_seq_ops); | |
2761 | if (rc) | |
2762 | goto out_kfree; | |
2763 | ||
2764 | seq = file->private_data; | |
2765 | seq->private = s; | |
2766 | out: | |
2767 | return rc; | |
2768 | out_kfree: | |
2769 | kfree(s); | |
2770 | goto out; | |
2771 | } | |
2772 | ||
2773 | static struct file_operations if6_fops = { | |
2774 | .owner = THIS_MODULE, | |
2775 | .open = if6_seq_open, | |
2776 | .read = seq_read, | |
2777 | .llseek = seq_lseek, | |
2778 | .release = seq_release_private, | |
2779 | }; | |
2780 | ||
2781 | int __init if6_proc_init(void) | |
2782 | { | |
2783 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2784 | return -ENOMEM; | |
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | void if6_proc_exit(void) | |
2789 | { | |
2790 | proc_net_remove("if_inet6"); | |
2791 | } | |
2792 | #endif /* CONFIG_PROC_FS */ | |
2793 | ||
3b9f9a1c NT |
2794 | #ifdef CONFIG_IPV6_MIP6 |
2795 | /* Check if address is a home address configured on any interface. */ | |
2796 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2797 | { | |
2798 | int ret = 0; | |
2799 | struct inet6_ifaddr * ifp; | |
2800 | u8 hash = ipv6_addr_hash(addr); | |
2801 | read_lock_bh(&addrconf_hash_lock); | |
2802 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2803 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2804 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2805 | ret = 1; | |
2806 | break; | |
2807 | } | |
2808 | } | |
2809 | read_unlock_bh(&addrconf_hash_lock); | |
2810 | return ret; | |
2811 | } | |
2812 | #endif | |
2813 | ||
1da177e4 LT |
2814 | /* |
2815 | * Periodic address status verification | |
2816 | */ | |
2817 | ||
2818 | static void addrconf_verify(unsigned long foo) | |
2819 | { | |
2820 | struct inet6_ifaddr *ifp; | |
2821 | unsigned long now, next; | |
2822 | int i; | |
2823 | ||
2824 | spin_lock_bh(&addrconf_verify_lock); | |
2825 | now = jiffies; | |
2826 | next = now + ADDR_CHECK_FREQUENCY; | |
2827 | ||
2828 | del_timer(&addr_chk_timer); | |
2829 | ||
2830 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2831 | ||
2832 | restart: | |
5d5780df | 2833 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2834 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2835 | unsigned long age; | |
2836 | #ifdef CONFIG_IPV6_PRIVACY | |
2837 | unsigned long regen_advance; | |
2838 | #endif | |
2839 | ||
2840 | if (ifp->flags & IFA_F_PERMANENT) | |
2841 | continue; | |
2842 | ||
2843 | spin_lock(&ifp->lock); | |
2844 | age = (now - ifp->tstamp) / HZ; | |
2845 | ||
2846 | #ifdef CONFIG_IPV6_PRIVACY | |
2847 | regen_advance = ifp->idev->cnf.regen_max_retry * | |
2848 | ifp->idev->cnf.dad_transmits * | |
2849 | ifp->idev->nd_parms->retrans_time / HZ; | |
2850 | #endif | |
2851 | ||
8f27ebb9 YH |
2852 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2853 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2854 | spin_unlock(&ifp->lock); |
2855 | in6_ifa_hold(ifp); | |
5d5780df | 2856 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2857 | ipv6_del_addr(ifp); |
2858 | goto restart; | |
8f27ebb9 YH |
2859 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2860 | spin_unlock(&ifp->lock); | |
2861 | continue; | |
1da177e4 LT |
2862 | } else if (age >= ifp->prefered_lft) { |
2863 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2864 | int deprecate = 0; | |
2865 | ||
2866 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2867 | deprecate = 1; | |
2868 | ifp->flags |= IFA_F_DEPRECATED; | |
2869 | } | |
2870 | ||
2871 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2872 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2873 | ||
2874 | spin_unlock(&ifp->lock); | |
2875 | ||
2876 | if (deprecate) { | |
2877 | in6_ifa_hold(ifp); | |
5d5780df | 2878 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2879 | |
2880 | ipv6_ifa_notify(0, ifp); | |
2881 | in6_ifa_put(ifp); | |
2882 | goto restart; | |
2883 | } | |
2884 | #ifdef CONFIG_IPV6_PRIVACY | |
2885 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2886 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2887 | if (age >= ifp->prefered_lft - regen_advance) { | |
2888 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2889 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2890 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2891 | if (!ifp->regen_count && ifpub) { | |
2892 | ifp->regen_count++; | |
2893 | in6_ifa_hold(ifp); | |
2894 | in6_ifa_hold(ifpub); | |
2895 | spin_unlock(&ifp->lock); | |
5d5780df | 2896 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2897 | spin_lock(&ifpub->lock); |
2898 | ifpub->regen_count = 0; | |
2899 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2900 | ipv6_create_tempaddr(ifpub, ifp); |
2901 | in6_ifa_put(ifpub); | |
2902 | in6_ifa_put(ifp); | |
2903 | goto restart; | |
2904 | } | |
2905 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2906 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2907 | spin_unlock(&ifp->lock); | |
2908 | #endif | |
2909 | } else { | |
2910 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2911 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2912 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2913 | spin_unlock(&ifp->lock); | |
2914 | } | |
2915 | } | |
5d5780df | 2916 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2917 | } |
2918 | ||
2919 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2920 | add_timer(&addr_chk_timer); | |
2921 | spin_unlock_bh(&addrconf_verify_lock); | |
2922 | } | |
2923 | ||
461d8837 TG |
2924 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2925 | { | |
2926 | struct in6_addr *pfx = NULL; | |
2927 | ||
2928 | if (addr) | |
2929 | pfx = nla_data(addr); | |
2930 | ||
2931 | if (local) { | |
2932 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2933 | pfx = NULL; | |
2934 | else | |
2935 | pfx = nla_data(local); | |
2936 | } | |
2937 | ||
2938 | return pfx; | |
2939 | } | |
2940 | ||
2941 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2942 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2943 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2944 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2945 | }; | |
2946 | ||
1da177e4 LT |
2947 | static int |
2948 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2949 | { | |
b933f716 TG |
2950 | struct ifaddrmsg *ifm; |
2951 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2952 | struct in6_addr *pfx; |
b933f716 | 2953 | int err; |
1da177e4 | 2954 | |
b933f716 TG |
2955 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2956 | if (err < 0) | |
2957 | return err; | |
2958 | ||
2959 | ifm = nlmsg_data(nlh); | |
2960 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2961 | if (pfx == NULL) |
2962 | return -EINVAL; | |
2963 | ||
2964 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2965 | } | |
2966 | ||
55ebaef1 NT |
2967 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
2968 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 2969 | { |
081bba5b NT |
2970 | if (!valid_lft || (prefered_lft > valid_lft)) |
2971 | return -EINVAL; | |
2972 | ||
081bba5b | 2973 | if (valid_lft == INFINITY_LIFE_TIME) |
55ebaef1 | 2974 | ifa_flags |= IFA_F_PERMANENT; |
081bba5b NT |
2975 | else if (valid_lft >= 0x7FFFFFFF/HZ) |
2976 | valid_lft = 0x7FFFFFFF/HZ; | |
2977 | ||
2978 | if (prefered_lft == 0) | |
55ebaef1 | 2979 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
2980 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
2981 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2982 | prefered_lft = 0x7FFFFFFF/HZ; | |
2983 | ||
2984 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 2985 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
2986 | ifp->tstamp = jiffies; |
2987 | ifp->valid_lft = valid_lft; | |
2988 | ifp->prefered_lft = prefered_lft; | |
2989 | ||
2990 | spin_unlock_bh(&ifp->lock); | |
2991 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2992 | ipv6_ifa_notify(0, ifp); | |
081bba5b NT |
2993 | |
2994 | addrconf_verify(0); | |
2995 | ||
2996 | return 0; | |
2997 | } | |
2998 | ||
1da177e4 LT |
2999 | static int |
3000 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3001 | { | |
461d8837 TG |
3002 | struct ifaddrmsg *ifm; |
3003 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3004 | struct in6_addr *pfx; |
7198f8ce TG |
3005 | struct inet6_ifaddr *ifa; |
3006 | struct net_device *dev; | |
55ebaef1 NT |
3007 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3008 | u8 ifa_flags; | |
461d8837 | 3009 | int err; |
1da177e4 | 3010 | |
461d8837 TG |
3011 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3012 | if (err < 0) | |
3013 | return err; | |
3014 | ||
3015 | ifm = nlmsg_data(nlh); | |
3016 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3017 | if (pfx == NULL) |
3018 | return -EINVAL; | |
3019 | ||
461d8837 | 3020 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3021 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3022 | |
3023 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3024 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3025 | preferred_lft = ci->ifa_prefered; |
3026 | } else { | |
3027 | preferred_lft = INFINITY_LIFE_TIME; | |
3028 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3029 | } |
3030 | ||
7198f8ce TG |
3031 | dev = __dev_get_by_index(ifm->ifa_index); |
3032 | if (dev == NULL) | |
3033 | return -ENODEV; | |
3034 | ||
55ebaef1 | 3035 | /* We ignore other flags so far. */ |
3b9f9a1c | 3036 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3037 | |
7198f8ce TG |
3038 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3039 | if (ifa == NULL) { | |
3040 | /* | |
3041 | * It would be best to check for !NLM_F_CREATE here but | |
3042 | * userspace alreay relies on not having to provide this. | |
3043 | */ | |
3044 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3045 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3046 | } |
3047 | ||
7198f8ce TG |
3048 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3049 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3050 | err = -EEXIST; | |
3051 | else | |
55ebaef1 | 3052 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3053 | |
3054 | in6_ifa_put(ifa); | |
3055 | ||
3056 | return err; | |
1da177e4 LT |
3057 | } |
3058 | ||
101bb229 TG |
3059 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3060 | u8 scope, int ifindex) | |
3061 | { | |
3062 | struct ifaddrmsg *ifm; | |
3063 | ||
3064 | ifm = nlmsg_data(nlh); | |
3065 | ifm->ifa_family = AF_INET6; | |
3066 | ifm->ifa_prefixlen = prefixlen; | |
3067 | ifm->ifa_flags = flags; | |
3068 | ifm->ifa_scope = scope; | |
3069 | ifm->ifa_index = ifindex; | |
3070 | } | |
3071 | ||
85486af0 TG |
3072 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3073 | unsigned long tstamp, u32 preferred, u32 valid) | |
3074 | { | |
3075 | struct ifa_cacheinfo ci; | |
3076 | ||
3077 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3078 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3079 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3080 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3081 | ci.ifa_prefered = preferred; | |
3082 | ci.ifa_valid = valid; | |
3083 | ||
3084 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3085 | } | |
3086 | ||
101bb229 TG |
3087 | static inline int rt_scope(int ifa_scope) |
3088 | { | |
3089 | if (ifa_scope & IFA_HOST) | |
3090 | return RT_SCOPE_HOST; | |
3091 | else if (ifa_scope & IFA_LINK) | |
3092 | return RT_SCOPE_LINK; | |
3093 | else if (ifa_scope & IFA_SITE) | |
3094 | return RT_SCOPE_SITE; | |
3095 | else | |
3096 | return RT_SCOPE_UNIVERSE; | |
3097 | } | |
3098 | ||
0ab6803b TG |
3099 | static inline int inet6_ifaddr_msgsize(void) |
3100 | { | |
339bf98f TG |
3101 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3102 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3103 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3104 | } |
c5396a31 | 3105 | |
1da177e4 | 3106 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3107 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3108 | { |
1da177e4 | 3109 | struct nlmsghdr *nlh; |
85486af0 | 3110 | u32 preferred, valid; |
1da177e4 | 3111 | |
0ab6803b TG |
3112 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3113 | if (nlh == NULL) | |
3114 | return -ENOBUFS; | |
3115 | ||
101bb229 TG |
3116 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3117 | ifa->idev->dev->ifindex); | |
3118 | ||
1da177e4 | 3119 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3120 | preferred = ifa->prefered_lft; |
3121 | valid = ifa->valid_lft; | |
3122 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3123 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3124 | preferred -= tval; |
3125 | if (valid != INFINITY_LIFE_TIME) | |
3126 | valid -= tval; | |
1da177e4 LT |
3127 | } |
3128 | } else { | |
85486af0 TG |
3129 | preferred = INFINITY_LIFE_TIME; |
3130 | valid = INFINITY_LIFE_TIME; | |
3131 | } | |
3132 | ||
0ab6803b TG |
3133 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
3134 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
3135 | return nlmsg_cancel(skb, nlh); | |
1da177e4 | 3136 | |
0ab6803b | 3137 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3138 | } |
3139 | ||
3140 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3141 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3142 | { |
1da177e4 | 3143 | struct nlmsghdr *nlh; |
101bb229 TG |
3144 | u8 scope = RT_SCOPE_UNIVERSE; |
3145 | int ifindex = ifmca->idev->dev->ifindex; | |
3146 | ||
3147 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3148 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3149 | |
0ab6803b TG |
3150 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3151 | if (nlh == NULL) | |
3152 | return -ENOBUFS; | |
85486af0 | 3153 | |
0ab6803b TG |
3154 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3155 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3156 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
85486af0 | 3157 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) |
0ab6803b | 3158 | return nlmsg_cancel(skb, nlh); |
85486af0 | 3159 | |
0ab6803b | 3160 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3161 | } |
3162 | ||
3163 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3164 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3165 | { |
1da177e4 | 3166 | struct nlmsghdr *nlh; |
101bb229 TG |
3167 | u8 scope = RT_SCOPE_UNIVERSE; |
3168 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3169 | ||
3170 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3171 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3172 | |
0ab6803b TG |
3173 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3174 | if (nlh == NULL) | |
3175 | return -ENOBUFS; | |
85486af0 | 3176 | |
0ab6803b TG |
3177 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3178 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3179 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
85486af0 | 3180 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) |
0ab6803b | 3181 | return nlmsg_cancel(skb, nlh); |
1da177e4 | 3182 | |
0ab6803b | 3183 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3184 | } |
3185 | ||
3186 | enum addr_type_t | |
3187 | { | |
3188 | UNICAST_ADDR, | |
3189 | MULTICAST_ADDR, | |
3190 | ANYCAST_ADDR, | |
3191 | }; | |
3192 | ||
3193 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3194 | enum addr_type_t type) | |
3195 | { | |
3196 | int idx, ip_idx; | |
3197 | int s_idx, s_ip_idx; | |
3198 | int err = 1; | |
3199 | struct net_device *dev; | |
3200 | struct inet6_dev *idev = NULL; | |
3201 | struct inet6_ifaddr *ifa; | |
3202 | struct ifmcaddr6 *ifmca; | |
3203 | struct ifacaddr6 *ifaca; | |
3204 | ||
3205 | s_idx = cb->args[0]; | |
3206 | s_ip_idx = ip_idx = cb->args[1]; | |
3207 | read_lock(&dev_base_lock); | |
3208 | ||
3209 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
3210 | if (idx < s_idx) | |
3211 | continue; | |
3212 | if (idx > s_idx) | |
3213 | s_ip_idx = 0; | |
3214 | ip_idx = 0; | |
3215 | if ((idev = in6_dev_get(dev)) == NULL) | |
3216 | continue; | |
3217 | read_lock_bh(&idev->lock); | |
3218 | switch (type) { | |
3219 | case UNICAST_ADDR: | |
ae9cda5d | 3220 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3221 | for (ifa = idev->addr_list; ifa; |
3222 | ifa = ifa->if_next, ip_idx++) { | |
3223 | if (ip_idx < s_ip_idx) | |
3224 | continue; | |
3225 | if ((err = inet6_fill_ifaddr(skb, ifa, | |
3226 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3227 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3228 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3229 | goto done; |
3230 | } | |
1da177e4 LT |
3231 | break; |
3232 | case MULTICAST_ADDR: | |
3233 | /* multicast address */ | |
3234 | for (ifmca = idev->mc_list; ifmca; | |
3235 | ifmca = ifmca->next, ip_idx++) { | |
3236 | if (ip_idx < s_ip_idx) | |
3237 | continue; | |
3238 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, | |
3239 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3240 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3241 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3242 | goto done; |
3243 | } | |
3244 | break; | |
3245 | case ANYCAST_ADDR: | |
3246 | /* anycast address */ | |
3247 | for (ifaca = idev->ac_list; ifaca; | |
3248 | ifaca = ifaca->aca_next, ip_idx++) { | |
3249 | if (ip_idx < s_ip_idx) | |
3250 | continue; | |
3251 | if ((err = inet6_fill_ifacaddr(skb, ifaca, | |
3252 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3253 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
3254 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3255 | goto done; |
3256 | } | |
3257 | break; | |
3258 | default: | |
3259 | break; | |
3260 | } | |
3261 | read_unlock_bh(&idev->lock); | |
3262 | in6_dev_put(idev); | |
3263 | } | |
3264 | done: | |
3265 | if (err <= 0) { | |
3266 | read_unlock_bh(&idev->lock); | |
3267 | in6_dev_put(idev); | |
3268 | } | |
3269 | read_unlock(&dev_base_lock); | |
3270 | cb->args[0] = idx; | |
3271 | cb->args[1] = ip_idx; | |
3272 | return skb->len; | |
3273 | } | |
3274 | ||
3275 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3276 | { | |
3277 | enum addr_type_t type = UNICAST_ADDR; | |
3278 | return inet6_dump_addr(skb, cb, type); | |
3279 | } | |
3280 | ||
3281 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3282 | { | |
3283 | enum addr_type_t type = MULTICAST_ADDR; | |
3284 | return inet6_dump_addr(skb, cb, type); | |
3285 | } | |
3286 | ||
3287 | ||
3288 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3289 | { | |
3290 | enum addr_type_t type = ANYCAST_ADDR; | |
3291 | return inet6_dump_addr(skb, cb, type); | |
3292 | } | |
3293 | ||
1b29fc2c TG |
3294 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3295 | void *arg) | |
6c223828 | 3296 | { |
1b29fc2c TG |
3297 | struct ifaddrmsg *ifm; |
3298 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3299 | struct in6_addr *addr = NULL; |
3300 | struct net_device *dev = NULL; | |
3301 | struct inet6_ifaddr *ifa; | |
3302 | struct sk_buff *skb; | |
6c223828 NT |
3303 | int err; |
3304 | ||
1b29fc2c TG |
3305 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3306 | if (err < 0) | |
3307 | goto errout; | |
3308 | ||
3309 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3310 | if (addr == NULL) { | |
3311 | err = -EINVAL; | |
3312 | goto errout; | |
6c223828 | 3313 | } |
6c223828 | 3314 | |
1b29fc2c | 3315 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3316 | if (ifm->ifa_index) |
3317 | dev = __dev_get_by_index(ifm->ifa_index); | |
3318 | ||
1b29fc2c TG |
3319 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3320 | err = -EADDRNOTAVAIL; | |
3321 | goto errout; | |
3322 | } | |
6c223828 | 3323 | |
0ab6803b | 3324 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3325 | err = -ENOBUFS; |
1b29fc2c | 3326 | goto errout_ifa; |
6c223828 NT |
3327 | } |
3328 | ||
6c223828 NT |
3329 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3330 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
339bf98f TG |
3331 | /* failure implies BUG in inet6_ifaddr_msgsize() */ |
3332 | BUG_ON(err < 0); | |
6c223828 | 3333 | |
2942e900 | 3334 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3335 | errout_ifa: |
6c223828 | 3336 | in6_ifa_put(ifa); |
1b29fc2c | 3337 | errout: |
6c223828 | 3338 | return err; |
6c223828 NT |
3339 | } |
3340 | ||
1da177e4 LT |
3341 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3342 | { | |
3343 | struct sk_buff *skb; | |
5d620266 | 3344 | int err = -ENOBUFS; |
1da177e4 | 3345 | |
0ab6803b | 3346 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3347 | if (skb == NULL) |
3348 | goto errout; | |
3349 | ||
3350 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
339bf98f TG |
3351 | /* failure implies BUG in inet6_ifaddr_msgsize() */ |
3352 | BUG_ON(err < 0); | |
5d620266 TG |
3353 | |
3354 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3355 | errout: | |
3356 | if (err < 0) | |
3357 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3358 | } |
3359 | ||
3360 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3361 | __s32 *array, int bytes) | |
3362 | { | |
04561c1f TG |
3363 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3364 | ||
1da177e4 LT |
3365 | memset(array, 0, bytes); |
3366 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3367 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3368 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3369 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3370 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3371 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3372 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3373 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3374 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3375 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3376 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3377 | #ifdef CONFIG_IPV6_PRIVACY | |
3378 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3379 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3380 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3381 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3382 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3383 | #endif | |
3384 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3385 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3386 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3387 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3388 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3389 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
09c884d4 YH |
3390 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3391 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; | |
3392 | #endif | |
930d6ff2 | 3393 | #endif |
fbea49e1 | 3394 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
1da177e4 LT |
3395 | } |
3396 | ||
339bf98f TG |
3397 | static inline size_t inet6_if_nlmsg_size(void) |
3398 | { | |
3399 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3400 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3401 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3402 | + nla_total_size(4) /* IFLA_MTU */ | |
3403 | + nla_total_size(4) /* IFLA_LINK */ | |
3404 | + nla_total_size( /* IFLA_PROTINFO */ | |
3405 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3406 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3407 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3408 | ); | |
3409 | } | |
c5396a31 | 3410 | |
1da177e4 | 3411 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3412 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3413 | { |
04561c1f TG |
3414 | struct net_device *dev = idev->dev; |
3415 | struct nlattr *conf; | |
3416 | struct ifinfomsg *hdr; | |
3417 | struct nlmsghdr *nlh; | |
3418 | void *protoinfo; | |
3419 | struct ifla_cacheinfo ci; | |
3420 | ||
3421 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3422 | if (nlh == NULL) | |
3423 | return -ENOBUFS; | |
3424 | ||
3425 | hdr = nlmsg_data(nlh); | |
3426 | hdr->ifi_family = AF_INET6; | |
3427 | hdr->__ifi_pad = 0; | |
3428 | hdr->ifi_type = dev->type; | |
3429 | hdr->ifi_index = dev->ifindex; | |
3430 | hdr->ifi_flags = dev_get_flags(dev); | |
3431 | hdr->ifi_change = 0; | |
3432 | ||
3433 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3434 | |
3435 | if (dev->addr_len) | |
04561c1f | 3436 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3437 | |
04561c1f | 3438 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3439 | if (dev->ifindex != dev->iflink) |
04561c1f | 3440 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3441 | |
04561c1f TG |
3442 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3443 | if (protoinfo == NULL) | |
3444 | goto nla_put_failure; | |
1da177e4 | 3445 | |
04561c1f | 3446 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3447 | |
1da177e4 LT |
3448 | ci.max_reasm_len = IPV6_MAXPLEN; |
3449 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3450 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3451 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3452 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3453 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3454 | ||
3455 | conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); | |
3456 | if (conf == NULL) | |
3457 | goto nla_put_failure; | |
3458 | ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf)); | |
1da177e4 LT |
3459 | |
3460 | /* XXX - Statistics/MC not implemented */ | |
1da177e4 | 3461 | |
04561c1f TG |
3462 | nla_nest_end(skb, protoinfo); |
3463 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3464 | |
04561c1f TG |
3465 | nla_put_failure: |
3466 | return nlmsg_cancel(skb, nlh); | |
1da177e4 LT |
3467 | } |
3468 | ||
3469 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3470 | { | |
3471 | int idx, err; | |
3472 | int s_idx = cb->args[0]; | |
3473 | struct net_device *dev; | |
3474 | struct inet6_dev *idev; | |
3475 | ||
3476 | read_lock(&dev_base_lock); | |
3477 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3478 | if (idx < s_idx) | |
3479 | continue; | |
3480 | if ((idev = in6_dev_get(dev)) == NULL) | |
3481 | continue; | |
3482 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3483 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3484 | in6_dev_put(idev); |
3485 | if (err <= 0) | |
3486 | break; | |
3487 | } | |
3488 | read_unlock(&dev_base_lock); | |
3489 | cb->args[0] = idx; | |
3490 | ||
3491 | return skb->len; | |
3492 | } | |
3493 | ||
3494 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3495 | { | |
3496 | struct sk_buff *skb; | |
8d7a76c9 | 3497 | int err = -ENOBUFS; |
1da177e4 | 3498 | |
339bf98f | 3499 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3500 | if (skb == NULL) |
3501 | goto errout; | |
3502 | ||
3503 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
339bf98f TG |
3504 | /* failure implies BUG in inet6_if_nlmsg_size() */ |
3505 | BUG_ON(err < 0); | |
8d7a76c9 TG |
3506 | |
3507 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3508 | errout: | |
3509 | if (err < 0) | |
3510 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3511 | } |
3512 | ||
339bf98f TG |
3513 | static inline size_t inet6_prefix_nlmsg_size(void) |
3514 | { | |
3515 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3516 | + nla_total_size(sizeof(struct in6_addr)) | |
3517 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3518 | } | |
c5396a31 | 3519 | |
1da177e4 | 3520 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b JHS |
3521 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3522 | int event, unsigned int flags) | |
1da177e4 LT |
3523 | { |
3524 | struct prefixmsg *pmsg; | |
3525 | struct nlmsghdr *nlh; | |
3526 | unsigned char *b = skb->tail; | |
3527 | struct prefix_cacheinfo ci; | |
3528 | ||
b6544c0b | 3529 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); |
1da177e4 LT |
3530 | pmsg = NLMSG_DATA(nlh); |
3531 | pmsg->prefix_family = AF_INET6; | |
8a47077a PM |
3532 | pmsg->prefix_pad1 = 0; |
3533 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3534 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3535 | pmsg->prefix_len = pinfo->prefix_len; | |
3536 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3537 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3538 | |
3539 | pmsg->prefix_flags = 0; | |
3540 | if (pinfo->onlink) | |
3541 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3542 | if (pinfo->autoconf) | |
3543 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3544 | ||
3545 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); | |
3546 | ||
3547 | ci.preferred_time = ntohl(pinfo->prefered); | |
3548 | ci.valid_time = ntohl(pinfo->valid); | |
3549 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); | |
3550 | ||
3551 | nlh->nlmsg_len = skb->tail - b; | |
3552 | return skb->len; | |
3553 | ||
3554 | nlmsg_failure: | |
3555 | rtattr_failure: | |
3556 | skb_trim(skb, b - skb->data); | |
3557 | return -1; | |
3558 | } | |
3559 | ||
3560 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
3561 | struct prefix_info *pinfo) | |
3562 | { | |
3563 | struct sk_buff *skb; | |
8c384bfa | 3564 | int err = -ENOBUFS; |
1da177e4 | 3565 | |
339bf98f | 3566 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3567 | if (skb == NULL) |
3568 | goto errout; | |
3569 | ||
3570 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
339bf98f TG |
3571 | /* failure implies BUG in inet6_prefix_nlmsg_size() */ |
3572 | BUG_ON(err < 0); | |
8c384bfa TG |
3573 | |
3574 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); | |
3575 | errout: | |
3576 | if (err < 0) | |
3577 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3578 | } |
3579 | ||
db46edc6 | 3580 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3581 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3582 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3583 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
6c223828 NT |
3584 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, |
3585 | .dumpit = inet6_dump_ifaddr, }, | |
1da177e4 LT |
3586 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
3587 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3588 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3589 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3590 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3591 | .dumpit = inet6_dump_fib, }, | |
8423a9aa | 3592 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
101367c2 | 3593 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, |
8423a9aa | 3594 | #endif |
1da177e4 LT |
3595 | }; |
3596 | ||
3597 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3598 | { | |
3599 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3600 | ||
3601 | switch (event) { | |
3602 | case RTM_NEWADDR: | |
40e22e8f | 3603 | ip6_ins_rt(ifp->rt); |
1da177e4 LT |
3604 | if (ifp->idev->cnf.forwarding) |
3605 | addrconf_join_anycast(ifp); | |
3606 | break; | |
3607 | case RTM_DELADDR: | |
3608 | if (ifp->idev->cnf.forwarding) | |
3609 | addrconf_leave_anycast(ifp); | |
3610 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3611 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3612 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3613 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3614 | break; |
3615 | } | |
3616 | } | |
3617 | ||
3618 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3619 | { | |
8814c4b5 | 3620 | rcu_read_lock_bh(); |
1da177e4 LT |
3621 | if (likely(ifp->idev->dead == 0)) |
3622 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3623 | rcu_read_unlock_bh(); |
1da177e4 LT |
3624 | } |
3625 | ||
3626 | #ifdef CONFIG_SYSCTL | |
3627 | ||
3628 | static | |
3629 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3630 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3631 | { | |
3632 | int *valp = ctl->data; | |
3633 | int val = *valp; | |
3634 | int ret; | |
3635 | ||
3636 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3637 | ||
3638 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3639 | if (valp != &ipv6_devconf.forwarding) { | |
3640 | if ((!*valp) ^ (!val)) { | |
3641 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3642 | if (idev == NULL) | |
3643 | return ret; | |
3644 | dev_forward_change(idev); | |
3645 | } | |
3646 | } else { | |
3647 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3648 | addrconf_forward_change(); | |
3649 | } | |
3650 | if (*valp) | |
3651 | rt6_purge_dflt_routers(); | |
3652 | } | |
3653 | ||
3654 | return ret; | |
3655 | } | |
3656 | ||
3657 | static int addrconf_sysctl_forward_strategy(ctl_table *table, | |
3658 | int __user *name, int nlen, | |
3659 | void __user *oldval, | |
3660 | size_t __user *oldlenp, | |
3661 | void __user *newval, size_t newlen, | |
3662 | void **context) | |
3663 | { | |
3664 | int *valp = table->data; | |
3665 | int new; | |
3666 | ||
3667 | if (!newval || !newlen) | |
3668 | return 0; | |
3669 | if (newlen != sizeof(int)) | |
3670 | return -EINVAL; | |
3671 | if (get_user(new, (int __user *)newval)) | |
3672 | return -EFAULT; | |
3673 | if (new == *valp) | |
3674 | return 0; | |
3675 | if (oldval && oldlenp) { | |
3676 | size_t len; | |
3677 | if (get_user(len, oldlenp)) | |
3678 | return -EFAULT; | |
3679 | if (len) { | |
3680 | if (len > table->maxlen) | |
3681 | len = table->maxlen; | |
3682 | if (copy_to_user(oldval, valp, len)) | |
3683 | return -EFAULT; | |
3684 | if (put_user(len, oldlenp)) | |
3685 | return -EFAULT; | |
3686 | } | |
3687 | } | |
3688 | ||
3689 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3690 | if (valp != &ipv6_devconf.forwarding) { | |
3691 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3692 | int changed; | |
3693 | if (unlikely(idev == NULL)) | |
3694 | return -ENODEV; | |
3695 | changed = (!*valp) ^ (!new); | |
3696 | *valp = new; | |
3697 | if (changed) | |
3698 | dev_forward_change(idev); | |
3699 | } else { | |
3700 | *valp = new; | |
3701 | addrconf_forward_change(); | |
3702 | } | |
3703 | ||
3704 | if (*valp) | |
3705 | rt6_purge_dflt_routers(); | |
3706 | } else | |
3707 | *valp = new; | |
3708 | ||
3709 | return 1; | |
3710 | } | |
3711 | ||
3712 | static struct addrconf_sysctl_table | |
3713 | { | |
3714 | struct ctl_table_header *sysctl_header; | |
3715 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3716 | ctl_table addrconf_dev[2]; | |
3717 | ctl_table addrconf_conf_dir[2]; | |
3718 | ctl_table addrconf_proto_dir[2]; | |
3719 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3720 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3721 | .sysctl_header = NULL, |
3722 | .addrconf_vars = { | |
3723 | { | |
3724 | .ctl_name = NET_IPV6_FORWARDING, | |
3725 | .procname = "forwarding", | |
3726 | .data = &ipv6_devconf.forwarding, | |
3727 | .maxlen = sizeof(int), | |
3728 | .mode = 0644, | |
3729 | .proc_handler = &addrconf_sysctl_forward, | |
3730 | .strategy = &addrconf_sysctl_forward_strategy, | |
3731 | }, | |
3732 | { | |
3733 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3734 | .procname = "hop_limit", | |
3735 | .data = &ipv6_devconf.hop_limit, | |
3736 | .maxlen = sizeof(int), | |
3737 | .mode = 0644, | |
3738 | .proc_handler = proc_dointvec, | |
3739 | }, | |
3740 | { | |
3741 | .ctl_name = NET_IPV6_MTU, | |
3742 | .procname = "mtu", | |
3743 | .data = &ipv6_devconf.mtu6, | |
3744 | .maxlen = sizeof(int), | |
3745 | .mode = 0644, | |
3746 | .proc_handler = &proc_dointvec, | |
3747 | }, | |
3748 | { | |
3749 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3750 | .procname = "accept_ra", | |
3751 | .data = &ipv6_devconf.accept_ra, | |
3752 | .maxlen = sizeof(int), | |
3753 | .mode = 0644, | |
3754 | .proc_handler = &proc_dointvec, | |
3755 | }, | |
3756 | { | |
3757 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3758 | .procname = "accept_redirects", | |
3759 | .data = &ipv6_devconf.accept_redirects, | |
3760 | .maxlen = sizeof(int), | |
3761 | .mode = 0644, | |
3762 | .proc_handler = &proc_dointvec, | |
3763 | }, | |
3764 | { | |
3765 | .ctl_name = NET_IPV6_AUTOCONF, | |
3766 | .procname = "autoconf", | |
3767 | .data = &ipv6_devconf.autoconf, | |
3768 | .maxlen = sizeof(int), | |
3769 | .mode = 0644, | |
3770 | .proc_handler = &proc_dointvec, | |
3771 | }, | |
3772 | { | |
3773 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3774 | .procname = "dad_transmits", | |
3775 | .data = &ipv6_devconf.dad_transmits, | |
3776 | .maxlen = sizeof(int), | |
3777 | .mode = 0644, | |
3778 | .proc_handler = &proc_dointvec, | |
3779 | }, | |
3780 | { | |
3781 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3782 | .procname = "router_solicitations", | |
3783 | .data = &ipv6_devconf.rtr_solicits, | |
3784 | .maxlen = sizeof(int), | |
3785 | .mode = 0644, | |
3786 | .proc_handler = &proc_dointvec, | |
3787 | }, | |
3788 | { | |
3789 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3790 | .procname = "router_solicitation_interval", | |
3791 | .data = &ipv6_devconf.rtr_solicit_interval, | |
3792 | .maxlen = sizeof(int), | |
3793 | .mode = 0644, | |
3794 | .proc_handler = &proc_dointvec_jiffies, | |
3795 | .strategy = &sysctl_jiffies, | |
3796 | }, | |
3797 | { | |
3798 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3799 | .procname = "router_solicitation_delay", | |
3800 | .data = &ipv6_devconf.rtr_solicit_delay, | |
3801 | .maxlen = sizeof(int), | |
3802 | .mode = 0644, | |
3803 | .proc_handler = &proc_dointvec_jiffies, | |
3804 | .strategy = &sysctl_jiffies, | |
3805 | }, | |
3806 | { | |
3807 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3808 | .procname = "force_mld_version", | |
3809 | .data = &ipv6_devconf.force_mld_version, | |
3810 | .maxlen = sizeof(int), | |
3811 | .mode = 0644, | |
3812 | .proc_handler = &proc_dointvec, | |
3813 | }, | |
3814 | #ifdef CONFIG_IPV6_PRIVACY | |
3815 | { | |
3816 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3817 | .procname = "use_tempaddr", | |
3818 | .data = &ipv6_devconf.use_tempaddr, | |
3819 | .maxlen = sizeof(int), | |
3820 | .mode = 0644, | |
3821 | .proc_handler = &proc_dointvec, | |
3822 | }, | |
3823 | { | |
3824 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3825 | .procname = "temp_valid_lft", | |
3826 | .data = &ipv6_devconf.temp_valid_lft, | |
3827 | .maxlen = sizeof(int), | |
3828 | .mode = 0644, | |
3829 | .proc_handler = &proc_dointvec, | |
3830 | }, | |
3831 | { | |
3832 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3833 | .procname = "temp_prefered_lft", | |
3834 | .data = &ipv6_devconf.temp_prefered_lft, | |
3835 | .maxlen = sizeof(int), | |
3836 | .mode = 0644, | |
3837 | .proc_handler = &proc_dointvec, | |
3838 | }, | |
3839 | { | |
3840 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3841 | .procname = "regen_max_retry", | |
3842 | .data = &ipv6_devconf.regen_max_retry, | |
3843 | .maxlen = sizeof(int), | |
3844 | .mode = 0644, | |
3845 | .proc_handler = &proc_dointvec, | |
3846 | }, | |
3847 | { | |
3848 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3849 | .procname = "max_desync_factor", | |
3850 | .data = &ipv6_devconf.max_desync_factor, | |
3851 | .maxlen = sizeof(int), | |
3852 | .mode = 0644, | |
3853 | .proc_handler = &proc_dointvec, | |
3854 | }, | |
3855 | #endif | |
3856 | { | |
3857 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3858 | .procname = "max_addresses", | |
3859 | .data = &ipv6_devconf.max_addresses, | |
3860 | .maxlen = sizeof(int), | |
3861 | .mode = 0644, | |
3862 | .proc_handler = &proc_dointvec, | |
3863 | }, | |
65f5c7c1 YH |
3864 | { |
3865 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3866 | .procname = "accept_ra_defrtr", | |
3867 | .data = &ipv6_devconf.accept_ra_defrtr, | |
3868 | .maxlen = sizeof(int), | |
3869 | .mode = 0644, | |
3870 | .proc_handler = &proc_dointvec, | |
3871 | }, | |
c4fd30eb YH |
3872 | { |
3873 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3874 | .procname = "accept_ra_pinfo", | |
3875 | .data = &ipv6_devconf.accept_ra_pinfo, | |
3876 | .maxlen = sizeof(int), | |
3877 | .mode = 0644, | |
3878 | .proc_handler = &proc_dointvec, | |
3879 | }, | |
930d6ff2 YH |
3880 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3881 | { | |
3882 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3883 | .procname = "accept_ra_rtr_pref", | |
3884 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3885 | .maxlen = sizeof(int), | |
3886 | .mode = 0644, | |
3887 | .proc_handler = &proc_dointvec, | |
3888 | }, | |
52e16356 YH |
3889 | { |
3890 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3891 | .procname = "router_probe_interval", | |
3892 | .data = &ipv6_devconf.rtr_probe_interval, | |
3893 | .maxlen = sizeof(int), | |
3894 | .mode = 0644, | |
3895 | .proc_handler = &proc_dointvec_jiffies, | |
3896 | .strategy = &sysctl_jiffies, | |
3897 | }, | |
09c884d4 YH |
3898 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3899 | { | |
3900 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3901 | .procname = "accept_ra_rt_info_max_plen", | |
3902 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3903 | .maxlen = sizeof(int), | |
3904 | .mode = 0644, | |
3905 | .proc_handler = &proc_dointvec, | |
3906 | }, | |
3907 | #endif | |
930d6ff2 | 3908 | #endif |
fbea49e1 YH |
3909 | { |
3910 | .ctl_name = NET_IPV6_PROXY_NDP, | |
3911 | .procname = "proxy_ndp", | |
3912 | .data = &ipv6_devconf.proxy_ndp, | |
3913 | .maxlen = sizeof(int), | |
3914 | .mode = 0644, | |
3915 | .proc_handler = &proc_dointvec, | |
3916 | }, | |
1da177e4 LT |
3917 | { |
3918 | .ctl_name = 0, /* sentinel */ | |
3919 | } | |
3920 | }, | |
3921 | .addrconf_dev = { | |
3922 | { | |
3923 | .ctl_name = NET_PROTO_CONF_ALL, | |
3924 | .procname = "all", | |
3925 | .mode = 0555, | |
3926 | .child = addrconf_sysctl.addrconf_vars, | |
3927 | }, | |
3928 | { | |
3929 | .ctl_name = 0, /* sentinel */ | |
3930 | } | |
3931 | }, | |
3932 | .addrconf_conf_dir = { | |
3933 | { | |
3934 | .ctl_name = NET_IPV6_CONF, | |
3935 | .procname = "conf", | |
3936 | .mode = 0555, | |
3937 | .child = addrconf_sysctl.addrconf_dev, | |
3938 | }, | |
3939 | { | |
3940 | .ctl_name = 0, /* sentinel */ | |
3941 | } | |
3942 | }, | |
3943 | .addrconf_proto_dir = { | |
3944 | { | |
3945 | .ctl_name = NET_IPV6, | |
3946 | .procname = "ipv6", | |
3947 | .mode = 0555, | |
3948 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3949 | }, | |
3950 | { | |
3951 | .ctl_name = 0, /* sentinel */ | |
3952 | } | |
3953 | }, | |
3954 | .addrconf_root_dir = { | |
3955 | { | |
3956 | .ctl_name = CTL_NET, | |
3957 | .procname = "net", | |
3958 | .mode = 0555, | |
3959 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3960 | }, | |
3961 | { | |
3962 | .ctl_name = 0, /* sentinel */ | |
3963 | } | |
3964 | }, | |
3965 | }; | |
3966 | ||
3967 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3968 | { | |
3969 | int i; | |
3970 | struct net_device *dev = idev ? idev->dev : NULL; | |
3971 | struct addrconf_sysctl_table *t; | |
3972 | char *dev_name = NULL; | |
3973 | ||
3974 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
3975 | if (t == NULL) | |
3976 | return; | |
3977 | memcpy(t, &addrconf_sysctl, sizeof(*t)); | |
3978 | for (i=0; t->addrconf_vars[i].data; i++) { | |
3979 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
3980 | t->addrconf_vars[i].de = NULL; | |
3981 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
3982 | } | |
3983 | if (dev) { | |
3984 | dev_name = dev->name; | |
3985 | t->addrconf_dev[0].ctl_name = dev->ifindex; | |
3986 | } else { | |
3987 | dev_name = "default"; | |
3988 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3989 | } | |
3990 | ||
3991 | /* | |
3992 | * Make a copy of dev_name, because '.procname' is regarded as const | |
3993 | * by sysctl and we wouldn't want anyone to change it under our feet | |
3994 | * (see SIOCSIFNAME). | |
3995 | */ | |
543537bd | 3996 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3997 | if (!dev_name) |
3998 | goto free; | |
3999 | ||
4000 | t->addrconf_dev[0].procname = dev_name; | |
4001 | ||
4002 | t->addrconf_dev[0].child = t->addrconf_vars; | |
4003 | t->addrconf_dev[0].de = NULL; | |
4004 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
4005 | t->addrconf_conf_dir[0].de = NULL; | |
4006 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
4007 | t->addrconf_proto_dir[0].de = NULL; | |
4008 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
4009 | t->addrconf_root_dir[0].de = NULL; | |
4010 | ||
4011 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
4012 | if (t->sysctl_header == NULL) | |
4013 | goto free_procname; | |
4014 | else | |
4015 | p->sysctl = t; | |
4016 | return; | |
4017 | ||
4018 | /* error path */ | |
4019 | free_procname: | |
4020 | kfree(dev_name); | |
4021 | free: | |
4022 | kfree(t); | |
4023 | ||
4024 | return; | |
4025 | } | |
4026 | ||
4027 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
4028 | { | |
4029 | if (p->sysctl) { | |
4030 | struct addrconf_sysctl_table *t = p->sysctl; | |
4031 | p->sysctl = NULL; | |
4032 | unregister_sysctl_table(t->sysctl_header); | |
4033 | kfree(t->addrconf_dev[0].procname); | |
4034 | kfree(t); | |
4035 | } | |
4036 | } | |
4037 | ||
4038 | ||
4039 | #endif | |
4040 | ||
4041 | /* | |
4042 | * Device notifier | |
4043 | */ | |
4044 | ||
4045 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4046 | { | |
e041c683 | 4047 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4048 | } |
4049 | ||
4050 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
4051 | { | |
e041c683 | 4052 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4053 | } |
4054 | ||
4055 | /* | |
4056 | * Init / cleanup code | |
4057 | */ | |
4058 | ||
4059 | int __init addrconf_init(void) | |
4060 | { | |
4061 | int err = 0; | |
4062 | ||
4063 | /* The addrconf netdev notifier requires that loopback_dev | |
4064 | * has it's ipv6 private information allocated and setup | |
4065 | * before it can bring up and give link-local addresses | |
4066 | * to other devices which are up. | |
4067 | * | |
4068 | * Unfortunately, loopback_dev is not necessarily the first | |
4069 | * entry in the global dev_base list of net devices. In fact, | |
4070 | * it is likely to be the very last entry on that list. | |
4071 | * So this causes the notifier registry below to try and | |
4072 | * give link-local addresses to all devices besides loopback_dev | |
4073 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4074 | * devices to fail to get a link-local address. | |
4075 | * | |
4076 | * So, as a temporary fix, allocate the ipv6 structure for | |
4077 | * loopback_dev first by hand. | |
4078 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4079 | * device and it being up should be removed. | |
4080 | */ | |
4081 | rtnl_lock(); | |
4082 | if (!ipv6_add_dev(&loopback_dev)) | |
4083 | err = -ENOMEM; | |
4084 | rtnl_unlock(); | |
4085 | if (err) | |
4086 | return err; | |
4087 | ||
c62dba90 HX |
4088 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4089 | ||
1da177e4 LT |
4090 | register_netdevice_notifier(&ipv6_dev_notf); |
4091 | ||
1da177e4 LT |
4092 | addrconf_verify(0); |
4093 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4094 | #ifdef CONFIG_SYSCTL | |
4095 | addrconf_sysctl.sysctl_header = | |
4096 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
4097 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
4098 | #endif | |
4099 | ||
4100 | return 0; | |
4101 | } | |
4102 | ||
4103 | void __exit addrconf_cleanup(void) | |
4104 | { | |
4105 | struct net_device *dev; | |
4106 | struct inet6_dev *idev; | |
4107 | struct inet6_ifaddr *ifa; | |
4108 | int i; | |
4109 | ||
4110 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4111 | ||
4112 | rtnetlink_links[PF_INET6] = NULL; | |
4113 | #ifdef CONFIG_SYSCTL | |
4114 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4115 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4116 | #endif | |
4117 | ||
4118 | rtnl_lock(); | |
4119 | ||
4120 | /* | |
4121 | * clean dev list. | |
4122 | */ | |
4123 | ||
4124 | for (dev=dev_base; dev; dev=dev->next) { | |
4125 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4126 | continue; | |
4127 | addrconf_ifdown(dev, 1); | |
4128 | } | |
4129 | addrconf_ifdown(&loopback_dev, 2); | |
4130 | ||
4131 | /* | |
4132 | * Check hash table. | |
4133 | */ | |
4134 | ||
4135 | write_lock_bh(&addrconf_hash_lock); | |
4136 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4137 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4138 | struct inet6_ifaddr *bifa; | |
4139 | ||
4140 | bifa = ifa; | |
4141 | ifa = ifa->lst_next; | |
4142 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4143 | /* Do not free it; something is wrong. | |
4144 | Now we can investigate it with debugger. | |
4145 | */ | |
4146 | } | |
4147 | } | |
4148 | write_unlock_bh(&addrconf_hash_lock); | |
4149 | ||
4150 | del_timer(&addr_chk_timer); | |
4151 | ||
4152 | rtnl_unlock(); | |
4153 | ||
1da177e4 LT |
4154 | #ifdef CONFIG_PROC_FS |
4155 | proc_net_remove("if_inet6"); | |
4156 | #endif | |
4157 | } |