Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
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); | |
1ab1457c | 108 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
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 | ||
1ab1457c | 140 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
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 | { |
e69a4adc | 235 | __be32 st; |
1da177e4 LT |
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)) | |
1ab1457c | 244 | return (IPV6_ADDR_UNICAST | |
b1cacb68 | 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)) | |
1ab1457c | 255 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | |
b1cacb68 | 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)) | |
1ab1457c | 275 | return (IPV6_ADDR_MAPPED | |
b1cacb68 | 276 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ |
1da177e4 LT |
277 | } |
278 | ||
1ab1457c | 279 | return (IPV6_ADDR_RESERVED | |
b1cacb68 | 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; | |
d88ae4cc | 344 | struct in6_addr maddr; |
1da177e4 LT |
345 | |
346 | ASSERT_RTNL(); | |
347 | ||
348 | if (dev->mtu < IPV6_MIN_MTU) | |
349 | return NULL; | |
350 | ||
1ab1457c | 351 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 352 | |
1ab1457c YH |
353 | if (ndev == NULL) |
354 | return NULL; | |
322f74a4 IO |
355 | |
356 | rwlock_init(&ndev->lock); | |
357 | ndev->dev = dev; | |
358 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
359 | ndev->cnf.mtu6 = dev->mtu; | |
360 | ndev->cnf.sysctl = NULL; | |
361 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
362 | if (ndev->nd_parms == NULL) { | |
363 | kfree(ndev); | |
364 | return NULL; | |
365 | } | |
366 | /* We refer to the device */ | |
367 | dev_hold(dev); | |
1da177e4 | 368 | |
322f74a4 IO |
369 | if (snmp6_alloc_dev(ndev) < 0) { |
370 | ADBG((KERN_WARNING | |
371 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
372 | __FUNCTION__, dev->name)); | |
373 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
374 | ndev->dead = 1; | |
375 | in6_dev_finish_destroy(ndev); | |
376 | return NULL; | |
377 | } | |
1da177e4 | 378 | |
322f74a4 IO |
379 | if (snmp6_register_dev(ndev) < 0) { |
380 | ADBG((KERN_WARNING | |
381 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
382 | __FUNCTION__, dev->name)); | |
383 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
384 | ndev->dead = 1; | |
385 | in6_dev_finish_destroy(ndev); | |
386 | return NULL; | |
387 | } | |
388 | ||
389 | /* One reference from device. We must do this before | |
390 | * we invoke __ipv6_regen_rndid(). | |
391 | */ | |
392 | in6_dev_hold(ndev); | |
1da177e4 LT |
393 | |
394 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
395 | init_timer(&ndev->regen_timer); |
396 | ndev->regen_timer.function = ipv6_regen_rndid; | |
397 | ndev->regen_timer.data = (unsigned long) ndev; | |
398 | if ((dev->flags&IFF_LOOPBACK) || | |
399 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
400 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
401 | dev->type == ARPHRD_SIT || | |
402 | #endif | |
403 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
404 | printk(KERN_INFO |
405 | "%s: Disabled Privacy Extensions\n", | |
406 | dev->name); | |
407 | ndev->cnf.use_tempaddr = -1; | |
408 | } else { | |
409 | in6_dev_hold(ndev); | |
410 | ipv6_regen_rndid((unsigned long) ndev); | |
411 | } | |
1da177e4 LT |
412 | #endif |
413 | ||
322f74a4 IO |
414 | if (netif_carrier_ok(dev)) |
415 | ndev->if_flags |= IF_READY; | |
3c21edbd | 416 | |
1da177e4 | 417 | |
322f74a4 IO |
418 | ipv6_mc_init_dev(ndev); |
419 | ndev->tstamp = jiffies; | |
1da177e4 | 420 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
421 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
422 | NET_IPV6_NEIGH, "ipv6", | |
423 | &ndisc_ifinfo_sysctl_change, | |
424 | NULL); | |
425 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 426 | #endif |
30c4cf57 DS |
427 | /* protected by rtnl_lock */ |
428 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
429 | |
430 | /* Join all-node multicast group */ | |
431 | ipv6_addr_all_nodes(&maddr); | |
432 | ipv6_dev_mc_inc(dev, &maddr); | |
433 | ||
1da177e4 LT |
434 | return ndev; |
435 | } | |
436 | ||
437 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
438 | { | |
439 | struct inet6_dev *idev; | |
440 | ||
441 | ASSERT_RTNL(); | |
442 | ||
443 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
444 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
445 | return NULL; | |
446 | } | |
c5e33bdd | 447 | |
1da177e4 LT |
448 | if (dev->flags&IFF_UP) |
449 | ipv6_mc_up(idev); | |
450 | return idev; | |
451 | } | |
452 | ||
453 | #ifdef CONFIG_SYSCTL | |
454 | static void dev_forward_change(struct inet6_dev *idev) | |
455 | { | |
456 | struct net_device *dev; | |
457 | struct inet6_ifaddr *ifa; | |
458 | struct in6_addr addr; | |
459 | ||
460 | if (!idev) | |
461 | return; | |
462 | dev = idev->dev; | |
463 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
464 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 465 | |
1da177e4 LT |
466 | if (idev->cnf.forwarding) |
467 | ipv6_dev_mc_inc(dev, &addr); | |
468 | else | |
469 | ipv6_dev_mc_dec(dev, &addr); | |
470 | } | |
471 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
472 | if (idev->cnf.forwarding) | |
473 | addrconf_join_anycast(ifa); | |
474 | else | |
475 | addrconf_leave_anycast(ifa); | |
476 | } | |
477 | } | |
478 | ||
479 | ||
480 | static void addrconf_forward_change(void) | |
481 | { | |
482 | struct net_device *dev; | |
483 | struct inet6_dev *idev; | |
484 | ||
485 | read_lock(&dev_base_lock); | |
486 | for (dev=dev_base; dev; dev=dev->next) { | |
8814c4b5 | 487 | rcu_read_lock(); |
1da177e4 LT |
488 | idev = __in6_dev_get(dev); |
489 | if (idev) { | |
490 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
491 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
492 | if (changed) | |
493 | dev_forward_change(idev); | |
494 | } | |
8814c4b5 | 495 | rcu_read_unlock(); |
1da177e4 LT |
496 | } |
497 | read_unlock(&dev_base_lock); | |
498 | } | |
499 | #endif | |
500 | ||
501 | /* Nobody refers to this ifaddr, destroy it */ | |
502 | ||
503 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
504 | { | |
505 | BUG_TRAP(ifp->if_next==NULL); | |
506 | BUG_TRAP(ifp->lst_next==NULL); | |
507 | #ifdef NET_REFCNT_DEBUG | |
508 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
509 | #endif | |
510 | ||
511 | in6_dev_put(ifp->idev); | |
512 | ||
513 | if (del_timer(&ifp->timer)) | |
514 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
515 | ||
516 | if (!ifp->dead) { | |
517 | printk("Freeing alive inet6 address %p\n", ifp); | |
518 | return; | |
519 | } | |
520 | dst_release(&ifp->rt->u.dst); | |
521 | ||
522 | kfree(ifp); | |
523 | } | |
524 | ||
e55ffac6 BH |
525 | static void |
526 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
527 | { | |
528 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 529 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
530 | |
531 | /* | |
532 | * Each device address list is sorted in order of scope - | |
533 | * global before linklocal. | |
534 | */ | |
535 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
536 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 537 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
538 | break; |
539 | } | |
540 | ||
541 | ifp->if_next = *ifap; | |
542 | *ifap = ifp; | |
543 | } | |
544 | ||
1da177e4 LT |
545 | /* On success it returns ifp with increased reference count */ |
546 | ||
547 | static struct inet6_ifaddr * | |
548 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 549 | int scope, u32 flags) |
1da177e4 LT |
550 | { |
551 | struct inet6_ifaddr *ifa = NULL; | |
552 | struct rt6_info *rt; | |
553 | int hash; | |
554 | int err = 0; | |
555 | ||
8814c4b5 | 556 | rcu_read_lock_bh(); |
1da177e4 LT |
557 | if (idev->dead) { |
558 | err = -ENODEV; /*XXX*/ | |
559 | goto out2; | |
560 | } | |
561 | ||
562 | write_lock(&addrconf_hash_lock); | |
563 | ||
564 | /* Ignore adding duplicate addresses on an interface */ | |
565 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
566 | ADBG(("ipv6_add_addr: already assigned\n")); | |
567 | err = -EEXIST; | |
568 | goto out; | |
569 | } | |
570 | ||
322f74a4 | 571 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
572 | |
573 | if (ifa == NULL) { | |
574 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
575 | err = -ENOBUFS; | |
576 | goto out; | |
577 | } | |
578 | ||
579 | rt = addrconf_dst_alloc(idev, addr, 0); | |
580 | if (IS_ERR(rt)) { | |
581 | err = PTR_ERR(rt); | |
582 | goto out; | |
583 | } | |
584 | ||
1da177e4 LT |
585 | ipv6_addr_copy(&ifa->addr, addr); |
586 | ||
587 | spin_lock_init(&ifa->lock); | |
588 | init_timer(&ifa->timer); | |
589 | ifa->timer.data = (unsigned long) ifa; | |
590 | ifa->scope = scope; | |
591 | ifa->prefix_len = pfxlen; | |
592 | ifa->flags = flags | IFA_F_TENTATIVE; | |
593 | ifa->cstamp = ifa->tstamp = jiffies; | |
594 | ||
57f5f544 KF |
595 | ifa->rt = rt; |
596 | ||
1da177e4 LT |
597 | ifa->idev = idev; |
598 | in6_dev_hold(idev); | |
599 | /* For caller */ | |
600 | in6_ifa_hold(ifa); | |
601 | ||
602 | /* Add to big hash table */ | |
603 | hash = ipv6_addr_hash(addr); | |
604 | ||
605 | ifa->lst_next = inet6_addr_lst[hash]; | |
606 | inet6_addr_lst[hash] = ifa; | |
607 | in6_ifa_hold(ifa); | |
608 | write_unlock(&addrconf_hash_lock); | |
609 | ||
610 | write_lock(&idev->lock); | |
611 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 612 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
613 | |
614 | #ifdef CONFIG_IPV6_PRIVACY | |
615 | if (ifa->flags&IFA_F_TEMPORARY) { | |
616 | ifa->tmp_next = idev->tempaddr_list; | |
617 | idev->tempaddr_list = ifa; | |
618 | in6_ifa_hold(ifa); | |
619 | } | |
620 | #endif | |
621 | ||
1da177e4 LT |
622 | in6_ifa_hold(ifa); |
623 | write_unlock(&idev->lock); | |
624 | out2: | |
8814c4b5 | 625 | rcu_read_unlock_bh(); |
1da177e4 | 626 | |
fd92833a | 627 | if (likely(err == 0)) |
e041c683 | 628 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
629 | else { |
630 | kfree(ifa); | |
631 | ifa = ERR_PTR(err); | |
632 | } | |
633 | ||
634 | return ifa; | |
635 | out: | |
636 | write_unlock(&addrconf_hash_lock); | |
637 | goto out2; | |
638 | } | |
639 | ||
640 | /* This function wants to get referenced ifp and releases it before return */ | |
641 | ||
642 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
643 | { | |
644 | struct inet6_ifaddr *ifa, **ifap; | |
645 | struct inet6_dev *idev = ifp->idev; | |
646 | int hash; | |
647 | int deleted = 0, onlink = 0; | |
648 | unsigned long expires = jiffies; | |
649 | ||
650 | hash = ipv6_addr_hash(&ifp->addr); | |
651 | ||
652 | ifp->dead = 1; | |
653 | ||
654 | write_lock_bh(&addrconf_hash_lock); | |
655 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
656 | ifap = &ifa->lst_next) { | |
657 | if (ifa == ifp) { | |
658 | *ifap = ifa->lst_next; | |
659 | __in6_ifa_put(ifp); | |
660 | ifa->lst_next = NULL; | |
661 | break; | |
662 | } | |
663 | } | |
664 | write_unlock_bh(&addrconf_hash_lock); | |
665 | ||
666 | write_lock_bh(&idev->lock); | |
667 | #ifdef CONFIG_IPV6_PRIVACY | |
668 | if (ifp->flags&IFA_F_TEMPORARY) { | |
669 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
670 | ifap = &ifa->tmp_next) { | |
671 | if (ifa == ifp) { | |
672 | *ifap = ifa->tmp_next; | |
673 | if (ifp->ifpub) { | |
674 | in6_ifa_put(ifp->ifpub); | |
675 | ifp->ifpub = NULL; | |
676 | } | |
677 | __in6_ifa_put(ifp); | |
678 | ifa->tmp_next = NULL; | |
679 | break; | |
680 | } | |
681 | } | |
682 | } | |
683 | #endif | |
684 | ||
1d142804 | 685 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
686 | if (ifa == ifp) { |
687 | *ifap = ifa->if_next; | |
688 | __in6_ifa_put(ifp); | |
689 | ifa->if_next = NULL; | |
690 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
691 | break; | |
692 | deleted = 1; | |
1d142804 | 693 | continue; |
1da177e4 LT |
694 | } else if (ifp->flags & IFA_F_PERMANENT) { |
695 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
696 | ifp->prefix_len)) { | |
697 | if (ifa->flags & IFA_F_PERMANENT) { | |
698 | onlink = 1; | |
699 | if (deleted) | |
700 | break; | |
701 | } else { | |
702 | unsigned long lifetime; | |
703 | ||
704 | if (!onlink) | |
705 | onlink = -1; | |
706 | ||
707 | spin_lock(&ifa->lock); | |
708 | lifetime = min_t(unsigned long, | |
709 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
710 | if (time_before(expires, | |
711 | ifa->tstamp + lifetime * HZ)) | |
712 | expires = ifa->tstamp + lifetime * HZ; | |
713 | spin_unlock(&ifa->lock); | |
714 | } | |
715 | } | |
716 | } | |
1d142804 | 717 | ifap = &ifa->if_next; |
1da177e4 LT |
718 | } |
719 | write_unlock_bh(&idev->lock); | |
720 | ||
721 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
722 | ||
e041c683 | 723 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
724 | |
725 | addrconf_del_timer(ifp); | |
726 | ||
727 | /* | |
728 | * Purge or update corresponding prefix | |
729 | * | |
730 | * 1) we don't purge prefix here if address was not permanent. | |
731 | * prefix is managed by its own lifetime. | |
732 | * 2) if there're no addresses, delete prefix. | |
733 | * 3) if there're still other permanent address(es), | |
734 | * corresponding prefix is still permanent. | |
735 | * 4) otherwise, update prefix lifetime to the | |
736 | * longest valid lifetime among the corresponding | |
737 | * addresses on the device. | |
738 | * Note: subsequent RA will update lifetime. | |
739 | * | |
740 | * --yoshfuji | |
741 | */ | |
742 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
743 | struct in6_addr prefix; | |
744 | struct rt6_info *rt; | |
745 | ||
746 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
747 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
748 | ||
749 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
750 | if (onlink == 0) { | |
e0a1ad73 | 751 | ip6_del_rt(rt); |
1da177e4 LT |
752 | rt = NULL; |
753 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
754 | rt->rt6i_expires = expires; | |
755 | rt->rt6i_flags |= RTF_EXPIRES; | |
756 | } | |
757 | } | |
758 | dst_release(&rt->u.dst); | |
759 | } | |
760 | ||
761 | in6_ifa_put(ifp); | |
762 | } | |
763 | ||
764 | #ifdef CONFIG_IPV6_PRIVACY | |
765 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
766 | { | |
767 | struct inet6_dev *idev = ifp->idev; | |
768 | struct in6_addr addr, *tmpaddr; | |
769 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
770 | int tmp_plen; | |
771 | int ret = 0; | |
772 | int max_addresses; | |
773 | ||
774 | write_lock(&idev->lock); | |
775 | if (ift) { | |
776 | spin_lock_bh(&ift->lock); | |
777 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
778 | spin_unlock_bh(&ift->lock); | |
779 | tmpaddr = &addr; | |
780 | } else { | |
781 | tmpaddr = NULL; | |
782 | } | |
783 | retry: | |
784 | in6_dev_hold(idev); | |
785 | if (idev->cnf.use_tempaddr <= 0) { | |
786 | write_unlock(&idev->lock); | |
787 | printk(KERN_INFO | |
788 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
789 | in6_dev_put(idev); | |
790 | ret = -1; | |
791 | goto out; | |
792 | } | |
793 | spin_lock_bh(&ifp->lock); | |
794 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
795 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
796 | spin_unlock_bh(&ifp->lock); | |
797 | write_unlock(&idev->lock); | |
798 | printk(KERN_WARNING | |
799 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
800 | in6_dev_put(idev); | |
801 | ret = -1; | |
802 | goto out; | |
803 | } | |
804 | in6_ifa_hold(ifp); | |
805 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
806 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
807 | spin_unlock_bh(&ifp->lock); | |
808 | write_unlock(&idev->lock); | |
809 | printk(KERN_WARNING | |
810 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
811 | in6_ifa_put(ifp); | |
812 | in6_dev_put(idev); | |
813 | ret = -1; | |
814 | goto out; | |
815 | } | |
816 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
817 | tmp_valid_lft = min_t(__u32, | |
818 | ifp->valid_lft, | |
819 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
820 | tmp_prefered_lft = min_t(__u32, |
821 | ifp->prefered_lft, | |
1da177e4 LT |
822 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
823 | tmp_plen = ifp->prefix_len; | |
824 | max_addresses = idev->cnf.max_addresses; | |
825 | tmp_cstamp = ifp->cstamp; | |
826 | tmp_tstamp = ifp->tstamp; | |
827 | spin_unlock_bh(&ifp->lock); | |
828 | ||
829 | write_unlock(&idev->lock); | |
830 | ift = !max_addresses || | |
1ab1457c | 831 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 LT |
832 | ipv6_add_addr(idev, &addr, tmp_plen, |
833 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
834 | if (!ift || IS_ERR(ift)) { | |
835 | in6_ifa_put(ifp); | |
836 | in6_dev_put(idev); | |
837 | printk(KERN_INFO | |
838 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
839 | tmpaddr = &addr; | |
840 | write_lock(&idev->lock); | |
841 | goto retry; | |
842 | } | |
843 | ||
844 | spin_lock_bh(&ift->lock); | |
845 | ift->ifpub = ifp; | |
846 | ift->valid_lft = tmp_valid_lft; | |
847 | ift->prefered_lft = tmp_prefered_lft; | |
848 | ift->cstamp = tmp_cstamp; | |
849 | ift->tstamp = tmp_tstamp; | |
850 | spin_unlock_bh(&ift->lock); | |
851 | ||
852 | addrconf_dad_start(ift, 0); | |
853 | in6_ifa_put(ift); | |
854 | in6_dev_put(idev); | |
855 | out: | |
856 | return ret; | |
857 | } | |
858 | #endif | |
859 | ||
860 | /* | |
072047e4 | 861 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 862 | */ |
072047e4 YH |
863 | struct ipv6_saddr_score { |
864 | int addr_type; | |
865 | unsigned int attrs; | |
866 | int matchlen; | |
0d27b427 | 867 | int scope; |
072047e4 YH |
868 | unsigned int rule; |
869 | }; | |
870 | ||
871 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
872 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
873 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
874 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
875 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
876 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
877 | ||
878 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 879 | { |
072047e4 YH |
880 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
881 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
882 | return 1; | |
883 | return 0; | |
1da177e4 LT |
884 | } |
885 | ||
072047e4 YH |
886 | /* static matching label */ |
887 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
888 | { | |
889 | /* | |
890 | * prefix (longest match) label | |
891 | * ----------------------------- | |
892 | * ::1/128 0 | |
893 | * ::/0 1 | |
894 | * 2002::/16 2 | |
895 | * ::/96 3 | |
896 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
897 | * fc00::/7 5 |
898 | * 2001::/32 6 | |
072047e4 YH |
899 | */ |
900 | if (type & IPV6_ADDR_LOOPBACK) | |
901 | return 0; | |
902 | else if (type & IPV6_ADDR_COMPATv4) | |
903 | return 3; | |
904 | else if (type & IPV6_ADDR_MAPPED) | |
905 | return 4; | |
102128e3 ŁS |
906 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
907 | return 6; | |
072047e4 YH |
908 | else if (addr->s6_addr16[0] == htons(0x2002)) |
909 | return 2; | |
102128e3 ŁS |
910 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
911 | return 5; | |
072047e4 YH |
912 | return 1; |
913 | } | |
1da177e4 | 914 | |
072047e4 | 915 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
916 | struct in6_addr *daddr, struct in6_addr *saddr) |
917 | { | |
072047e4 YH |
918 | struct ipv6_saddr_score hiscore; |
919 | struct inet6_ifaddr *ifa_result = NULL; | |
920 | int daddr_type = __ipv6_addr_type(daddr); | |
921 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
922 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
923 | struct net_device *dev; | |
1da177e4 | 924 | |
072047e4 | 925 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 926 | |
072047e4 | 927 | read_lock(&dev_base_lock); |
8814c4b5 | 928 | rcu_read_lock(); |
1da177e4 | 929 | |
072047e4 YH |
930 | for (dev = dev_base; dev; dev=dev->next) { |
931 | struct inet6_dev *idev; | |
932 | struct inet6_ifaddr *ifa; | |
933 | ||
934 | /* Rule 0: Candidate Source Address (section 4) | |
935 | * - multicast and link-local destination address, | |
936 | * the set of candidate source address MUST only | |
937 | * include addresses assigned to interfaces | |
938 | * belonging to the same link as the outgoing | |
939 | * interface. | |
940 | * (- For site-local destination addresses, the | |
941 | * set of candidate source addresses MUST only | |
942 | * include addresses assigned to interfaces | |
943 | * belonging to the same site as the outgoing | |
944 | * interface.) | |
945 | */ | |
946 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
947 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
948 | daddr_dev && dev != daddr_dev) | |
949 | continue; | |
1da177e4 | 950 | |
1da177e4 | 951 | idev = __in6_dev_get(dev); |
072047e4 YH |
952 | if (!idev) |
953 | continue; | |
954 | ||
955 | read_lock_bh(&idev->lock); | |
956 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
957 | struct ipv6_saddr_score score; | |
958 | ||
959 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
960 | ||
6b3ae80a YH |
961 | /* Rule 0: |
962 | * - Tentative Address (RFC2462 section 5.4) | |
963 | * - A tentative address is not considered | |
964 | * "assigned to an interface" in the traditional | |
965 | * sense. | |
966 | * - Candidate Source Address (section 4) | |
072047e4 YH |
967 | * - In any case, anycast addresses, multicast |
968 | * addresses, and the unspecified address MUST | |
969 | * NOT be included in a candidate set. | |
970 | */ | |
6b3ae80a YH |
971 | if (ifa->flags & IFA_F_TENTATIVE) |
972 | continue; | |
072047e4 YH |
973 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
974 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
975 | LIMIT_NETDEBUG(KERN_DEBUG | |
976 | "ADDRCONF: unspecified / multicast address" | |
977 | "assigned as unicast address on %s", | |
978 | dev->name); | |
979 | continue; | |
980 | } | |
981 | ||
982 | score.attrs = 0; | |
983 | score.matchlen = 0; | |
984 | score.scope = 0; | |
985 | score.rule = 0; | |
986 | ||
987 | if (ifa_result == NULL) { | |
988 | /* record it if the first available entry */ | |
989 | goto record_it; | |
990 | } | |
991 | ||
992 | /* Rule 1: Prefer same address */ | |
993 | if (hiscore.rule < 1) { | |
994 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
995 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
996 | hiscore.rule++; | |
997 | } | |
998 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
999 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
1000 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
1001 | score.rule = 1; | |
1002 | goto record_it; | |
1da177e4 | 1003 | } |
072047e4 YH |
1004 | } else { |
1005 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
1006 | continue; | |
1da177e4 | 1007 | } |
1da177e4 | 1008 | |
072047e4 YH |
1009 | /* Rule 2: Prefer appropriate scope */ |
1010 | if (hiscore.rule < 2) { | |
1011 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
1012 | hiscore.rule++; | |
1013 | } | |
1014 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1015 | if (hiscore.scope < score.scope) { | |
1016 | if (hiscore.scope < daddr_scope) { | |
1017 | score.rule = 2; | |
1018 | goto record_it; | |
1019 | } else | |
1020 | continue; | |
1021 | } else if (score.scope < hiscore.scope) { | |
1022 | if (score.scope < daddr_scope) | |
e55ffac6 | 1023 | break; /* addresses sorted by scope */ |
072047e4 YH |
1024 | else { |
1025 | score.rule = 2; | |
1026 | goto record_it; | |
1027 | } | |
1028 | } | |
1da177e4 | 1029 | |
072047e4 YH |
1030 | /* Rule 3: Avoid deprecated address */ |
1031 | if (hiscore.rule < 3) { | |
1032 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
1033 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
1034 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1035 | hiscore.rule++; | |
1036 | } | |
1037 | if (ipv6_saddr_preferred(score.addr_type) || | |
1038 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
1039 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1040 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1041 | score.rule = 3; | |
1042 | goto record_it; | |
1043 | } | |
1044 | } else { | |
1045 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1046 | continue; | |
1047 | } | |
1da177e4 | 1048 | |
3b9f9a1c NT |
1049 | /* Rule 4: Prefer home address */ |
1050 | #ifdef CONFIG_IPV6_MIP6 | |
1051 | if (hiscore.rule < 4) { | |
1052 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1053 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1054 | hiscore.rule++; | |
1055 | } | |
1056 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1057 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1058 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1059 | score.rule = 4; | |
1060 | goto record_it; | |
1061 | } | |
1062 | } else { | |
1063 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1064 | continue; | |
1065 | } | |
1066 | #else | |
220bbd74 YH |
1067 | if (hiscore.rule < 4) |
1068 | hiscore.rule++; | |
3b9f9a1c | 1069 | #endif |
072047e4 YH |
1070 | |
1071 | /* Rule 5: Prefer outgoing interface */ | |
1072 | if (hiscore.rule < 5) { | |
1073 | if (daddr_dev == NULL || | |
1074 | daddr_dev == ifa_result->idev->dev) | |
1075 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1076 | hiscore.rule++; | |
1077 | } | |
1078 | if (daddr_dev == NULL || | |
1079 | daddr_dev == ifa->idev->dev) { | |
1080 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1081 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1082 | score.rule = 5; | |
1083 | goto record_it; | |
1084 | } | |
1085 | } else { | |
1086 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1087 | continue; | |
1088 | } | |
1089 | ||
1090 | /* Rule 6: Prefer matching label */ | |
1091 | if (hiscore.rule < 6) { | |
1092 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1093 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1094 | hiscore.rule++; | |
1095 | } | |
1096 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1097 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1098 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1099 | score.rule = 6; | |
1100 | goto record_it; | |
1da177e4 | 1101 | } |
072047e4 YH |
1102 | } else { |
1103 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1104 | continue; | |
1105 | } | |
1106 | ||
44fd0261 | 1107 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1108 | /* Rule 7: Prefer public address |
1109 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1110 | */ | |
1111 | if (hiscore.rule < 7) { | |
1112 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1113 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1114 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1115 | hiscore.rule++; | |
1116 | } | |
1117 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1118 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1119 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1120 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1121 | score.rule = 7; | |
1122 | goto record_it; | |
1123 | } | |
1124 | } else { | |
1125 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1126 | continue; | |
1127 | } | |
5e2707fa YH |
1128 | #else |
1129 | if (hiscore.rule < 7) | |
1130 | hiscore.rule++; | |
44fd0261 | 1131 | #endif |
072047e4 | 1132 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1133 | if (hiscore.rule < 8) { |
072047e4 | 1134 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1135 | hiscore.rule++; |
1136 | } | |
072047e4 YH |
1137 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1138 | if (score.matchlen > hiscore.matchlen) { | |
1139 | score.rule = 8; | |
1140 | goto record_it; | |
1da177e4 | 1141 | } |
072047e4 YH |
1142 | #if 0 |
1143 | else if (score.matchlen < hiscore.matchlen) | |
1144 | continue; | |
1145 | #endif | |
1146 | ||
1147 | /* Final Rule: choose first available one */ | |
1148 | continue; | |
1149 | record_it: | |
1150 | if (ifa_result) | |
1151 | in6_ifa_put(ifa_result); | |
1152 | in6_ifa_hold(ifa); | |
1153 | ifa_result = ifa; | |
1154 | hiscore = score; | |
1da177e4 | 1155 | } |
072047e4 | 1156 | read_unlock_bh(&idev->lock); |
1da177e4 | 1157 | } |
8814c4b5 | 1158 | rcu_read_unlock(); |
1da177e4 LT |
1159 | read_unlock(&dev_base_lock); |
1160 | ||
072047e4 YH |
1161 | if (!ifa_result) |
1162 | return -EADDRNOTAVAIL; | |
1ab1457c | 1163 | |
072047e4 YH |
1164 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1165 | in6_ifa_put(ifa_result); | |
1166 | return 0; | |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | ||
1170 | int ipv6_get_saddr(struct dst_entry *dst, | |
1171 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1172 | { | |
7a3025b1 | 1173 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1174 | } |
1175 | ||
1176 | ||
1177 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1178 | { | |
1179 | struct inet6_dev *idev; | |
1180 | int err = -EADDRNOTAVAIL; | |
1181 | ||
8814c4b5 | 1182 | rcu_read_lock(); |
1da177e4 LT |
1183 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1184 | struct inet6_ifaddr *ifp; | |
1185 | ||
1186 | read_lock_bh(&idev->lock); | |
1187 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1188 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1189 | ipv6_addr_copy(addr, &ifp->addr); | |
1190 | err = 0; | |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | read_unlock_bh(&idev->lock); | |
1195 | } | |
8814c4b5 | 1196 | rcu_read_unlock(); |
1da177e4 LT |
1197 | return err; |
1198 | } | |
1199 | ||
1200 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1201 | { | |
1202 | int cnt = 0; | |
1203 | struct inet6_ifaddr *ifp; | |
1204 | ||
1205 | read_lock_bh(&idev->lock); | |
1206 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1207 | cnt++; | |
1208 | read_unlock_bh(&idev->lock); | |
1209 | return cnt; | |
1210 | } | |
1211 | ||
1212 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1213 | { | |
1214 | struct inet6_ifaddr * ifp; | |
1215 | u8 hash = ipv6_addr_hash(addr); | |
1216 | ||
1217 | read_lock_bh(&addrconf_hash_lock); | |
1218 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1219 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1220 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1221 | if (dev == NULL || ifp->idev->dev == dev || | |
1222 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1223 | break; | |
1224 | } | |
1225 | } | |
1226 | read_unlock_bh(&addrconf_hash_lock); | |
1227 | return ifp != NULL; | |
1228 | } | |
1229 | ||
1230 | static | |
1231 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1232 | { | |
1233 | struct inet6_ifaddr * ifp; | |
1234 | u8 hash = ipv6_addr_hash(addr); | |
1235 | ||
1236 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1237 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1238 | if (dev == NULL || ifp->idev->dev == dev) | |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | return ifp != NULL; | |
1243 | } | |
1244 | ||
1245 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1246 | { | |
1247 | struct inet6_ifaddr * ifp; | |
1248 | u8 hash = ipv6_addr_hash(addr); | |
1249 | ||
1250 | read_lock_bh(&addrconf_hash_lock); | |
1251 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1252 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1253 | if (dev == NULL || ifp->idev->dev == dev || | |
1254 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1255 | in6_ifa_hold(ifp); | |
1256 | break; | |
1257 | } | |
1258 | } | |
1259 | } | |
1260 | read_unlock_bh(&addrconf_hash_lock); | |
1261 | ||
1262 | return ifp; | |
1263 | } | |
1264 | ||
1265 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1266 | { | |
1267 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1268 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1269 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1270 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1271 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1272 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1273 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1274 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1275 | ||
1276 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1277 | return 1; | |
1278 | ||
1279 | if (addr_type2 == IPV6_ADDR_ANY && | |
1280 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1281 | return 1; | |
1282 | ||
1283 | if (addr_type == IPV6_ADDR_ANY && | |
1284 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1285 | return 1; | |
1286 | ||
1287 | if (sk2_rcv_saddr6 && | |
1288 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1289 | return 1; | |
1290 | ||
1291 | if (addr_type == IPV6_ADDR_MAPPED && | |
1292 | !sk2_ipv6only && | |
1293 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1294 | return 1; | |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /* Gets referenced address, destroys ifaddr */ | |
1300 | ||
9f5336e2 | 1301 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1302 | { |
1da177e4 LT |
1303 | if (ifp->flags&IFA_F_PERMANENT) { |
1304 | spin_lock_bh(&ifp->lock); | |
1305 | addrconf_del_timer(ifp); | |
1306 | ifp->flags |= IFA_F_TENTATIVE; | |
1307 | spin_unlock_bh(&ifp->lock); | |
1308 | in6_ifa_put(ifp); | |
1309 | #ifdef CONFIG_IPV6_PRIVACY | |
1310 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1311 | struct inet6_ifaddr *ifpub; | |
1312 | spin_lock_bh(&ifp->lock); | |
1313 | ifpub = ifp->ifpub; | |
1314 | if (ifpub) { | |
1315 | in6_ifa_hold(ifpub); | |
1316 | spin_unlock_bh(&ifp->lock); | |
1317 | ipv6_create_tempaddr(ifpub, ifp); | |
1318 | in6_ifa_put(ifpub); | |
1319 | } else { | |
1320 | spin_unlock_bh(&ifp->lock); | |
1321 | } | |
1322 | ipv6_del_addr(ifp); | |
1323 | #endif | |
1324 | } else | |
1325 | ipv6_del_addr(ifp); | |
1326 | } | |
1327 | ||
3c21edbd YH |
1328 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1329 | { | |
1330 | if (net_ratelimit()) | |
1331 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1332 | addrconf_dad_stop(ifp); | |
1333 | } | |
1da177e4 LT |
1334 | |
1335 | /* Join to solicited addr multicast group. */ | |
1336 | ||
1337 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1338 | { | |
1339 | struct in6_addr maddr; | |
1340 | ||
1341 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1342 | return; | |
1343 | ||
1344 | addrconf_addr_solict_mult(addr, &maddr); | |
1345 | ipv6_dev_mc_inc(dev, &maddr); | |
1346 | } | |
1347 | ||
1348 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1349 | { | |
1350 | struct in6_addr maddr; | |
1351 | ||
1352 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1353 | return; | |
1354 | ||
1355 | addrconf_addr_solict_mult(addr, &maddr); | |
1356 | __ipv6_dev_mc_dec(idev, &maddr); | |
1357 | } | |
1358 | ||
20380731 | 1359 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1360 | { |
1361 | struct in6_addr addr; | |
1362 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1363 | if (ipv6_addr_any(&addr)) | |
1364 | return; | |
1365 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1366 | } | |
1367 | ||
20380731 | 1368 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1369 | { |
1370 | struct in6_addr addr; | |
1371 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1372 | if (ipv6_addr_any(&addr)) | |
1373 | return; | |
1374 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1375 | } | |
1376 | ||
073a8e0e YH |
1377 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1378 | { | |
1379 | if (dev->addr_len != ETH_ALEN) | |
1380 | return -1; | |
1381 | memcpy(eui, dev->dev_addr, 3); | |
1382 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1383 | ||
1384 | /* | |
1385 | * The zSeries OSA network cards can be shared among various | |
1386 | * OS instances, but the OSA cards have only one MAC address. | |
1387 | * This leads to duplicate address conflicts in conjunction | |
1388 | * with IPv6 if more than one instance uses the same card. | |
1389 | * | |
1390 | * The driver for these cards can deliver a unique 16-bit | |
1391 | * identifier for each instance sharing the same card. It is | |
1392 | * placed instead of 0xFFFE in the interface identifier. The | |
1393 | * "u" bit of the interface identifier is not inverted in this | |
1394 | * case. Hence the resulting interface identifier has local | |
1395 | * scope according to RFC2373. | |
1396 | */ | |
1397 | if (dev->dev_id) { | |
1398 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1399 | eui[4] = dev->dev_id & 0xFF; | |
1400 | } else { | |
1401 | eui[3] = 0xFF; | |
1402 | eui[4] = 0xFE; | |
1403 | eui[0] ^= 2; | |
1404 | } | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1409 | { | |
1410 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1411 | if (dev->addr_len != ARCNET_ALEN) | |
1412 | return -1; | |
1413 | memset(eui, 0, 7); | |
1414 | eui[7] = *(u8*)dev->dev_addr; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1419 | { | |
1420 | if (dev->addr_len != INFINIBAND_ALEN) | |
1421 | return -1; | |
1422 | memcpy(eui, dev->dev_addr + 12, 8); | |
1423 | eui[0] |= 2; | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1da177e4 LT |
1427 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1428 | { | |
1429 | switch (dev->type) { | |
1430 | case ARPHRD_ETHER: | |
1431 | case ARPHRD_FDDI: | |
1432 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1433 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1434 | case ARPHRD_ARCNET: |
073a8e0e | 1435 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1436 | case ARPHRD_INFINIBAND: |
073a8e0e | 1437 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1438 | } |
1439 | return -1; | |
1440 | } | |
1441 | ||
1442 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1443 | { | |
1444 | int err = -1; | |
1445 | struct inet6_ifaddr *ifp; | |
1446 | ||
1447 | read_lock_bh(&idev->lock); | |
1448 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1449 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1450 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1451 | err = 0; | |
1452 | break; | |
1453 | } | |
1454 | } | |
1455 | read_unlock_bh(&idev->lock); | |
1456 | return err; | |
1457 | } | |
1458 | ||
1459 | #ifdef CONFIG_IPV6_PRIVACY | |
1460 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1461 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1462 | { | |
1da177e4 | 1463 | regen: |
955189ef | 1464 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1465 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1466 | |
1467 | /* | |
1468 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1469 | * check if generated address is not inappropriate | |
1470 | * | |
1471 | * - Reserved subnet anycast (RFC 2526) | |
1472 | * 11111101 11....11 1xxxxxxx | |
1473 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1474 | * 00-00-5E-FE-xx-xx-xx-xx | |
1475 | * - value 0 | |
1476 | * - XXX: already assigned to an address on the device | |
1477 | */ | |
1ab1457c | 1478 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1479 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1480 | (idev->rndid[7]&0x80)) | |
1481 | goto regen; | |
1482 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1483 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1484 | goto regen; | |
1485 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1486 | goto regen; | |
1487 | } | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static void ipv6_regen_rndid(unsigned long data) | |
1493 | { | |
1494 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1495 | unsigned long expires; | |
1496 | ||
8814c4b5 | 1497 | rcu_read_lock_bh(); |
1da177e4 LT |
1498 | write_lock_bh(&idev->lock); |
1499 | ||
1500 | if (idev->dead) | |
1501 | goto out; | |
1502 | ||
1503 | if (__ipv6_regen_rndid(idev) < 0) | |
1504 | goto out; | |
1ab1457c | 1505 | |
1da177e4 | 1506 | expires = jiffies + |
1ab1457c | 1507 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1508 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1509 | if (time_before(expires, jiffies)) { | |
1510 | printk(KERN_WARNING | |
1511 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1512 | idev->dev->name); | |
1513 | goto out; | |
1514 | } | |
1515 | ||
1516 | if (!mod_timer(&idev->regen_timer, expires)) | |
1517 | in6_dev_hold(idev); | |
1518 | ||
1519 | out: | |
1520 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1521 | rcu_read_unlock_bh(); |
1da177e4 LT |
1522 | in6_dev_put(idev); |
1523 | } | |
1524 | ||
1525 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1526 | int ret = 0; | |
1527 | ||
1528 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1529 | ret = __ipv6_regen_rndid(idev); | |
1530 | return ret; | |
1531 | } | |
1532 | #endif | |
1533 | ||
1534 | /* | |
1535 | * Add prefix route. | |
1536 | */ | |
1537 | ||
1538 | static void | |
1539 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1540 | unsigned long expires, u32 flags) |
1da177e4 | 1541 | { |
86872cb5 TG |
1542 | struct fib6_config cfg = { |
1543 | .fc_table = RT6_TABLE_PREFIX, | |
1544 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1545 | .fc_ifindex = dev->ifindex, | |
1546 | .fc_expires = expires, | |
1547 | .fc_dst_len = plen, | |
1548 | .fc_flags = RTF_UP | flags, | |
1549 | }; | |
1da177e4 | 1550 | |
86872cb5 | 1551 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1552 | |
1553 | /* Prevent useless cloning on PtP SIT. | |
1554 | This thing is done here expecting that the whole | |
1555 | class of non-broadcast devices need not cloning. | |
1556 | */ | |
0be669bb | 1557 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1558 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1559 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1560 | #endif |
1da177e4 | 1561 | |
86872cb5 | 1562 | ip6_route_add(&cfg); |
1da177e4 LT |
1563 | } |
1564 | ||
1565 | /* Create "default" multicast route to the interface */ | |
1566 | ||
1567 | static void addrconf_add_mroute(struct net_device *dev) | |
1568 | { | |
86872cb5 TG |
1569 | struct fib6_config cfg = { |
1570 | .fc_table = RT6_TABLE_LOCAL, | |
1571 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1572 | .fc_ifindex = dev->ifindex, | |
1573 | .fc_dst_len = 8, | |
1574 | .fc_flags = RTF_UP, | |
1575 | }; | |
1576 | ||
1577 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1578 | ||
1579 | ip6_route_add(&cfg); | |
1da177e4 LT |
1580 | } |
1581 | ||
0be669bb | 1582 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1583 | static void sit_route_add(struct net_device *dev) |
1584 | { | |
86872cb5 TG |
1585 | struct fib6_config cfg = { |
1586 | .fc_table = RT6_TABLE_MAIN, | |
1587 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1588 | .fc_ifindex = dev->ifindex, | |
1589 | .fc_dst_len = 96, | |
1590 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1591 | }; | |
1da177e4 LT |
1592 | |
1593 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1594 | ip6_route_add(&cfg); |
1da177e4 | 1595 | } |
0be669bb | 1596 | #endif |
1da177e4 LT |
1597 | |
1598 | static void addrconf_add_lroute(struct net_device *dev) | |
1599 | { | |
1600 | struct in6_addr addr; | |
1601 | ||
1602 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1603 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1604 | } | |
1605 | ||
1606 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1607 | { | |
1608 | struct inet6_dev *idev; | |
1609 | ||
1610 | ASSERT_RTNL(); | |
1611 | ||
1612 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1613 | return NULL; | |
1614 | ||
1615 | /* Add default multicast route */ | |
1616 | addrconf_add_mroute(dev); | |
1617 | ||
1618 | /* Add link local route */ | |
1619 | addrconf_add_lroute(dev); | |
1620 | return idev; | |
1621 | } | |
1622 | ||
1623 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1624 | { | |
1625 | struct prefix_info *pinfo; | |
1626 | __u32 valid_lft; | |
1627 | __u32 prefered_lft; | |
1628 | int addr_type; | |
1629 | unsigned long rt_expires; | |
1630 | struct inet6_dev *in6_dev; | |
1631 | ||
1632 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1633 | |
1da177e4 LT |
1634 | if (len < sizeof(struct prefix_info)) { |
1635 | ADBG(("addrconf: prefix option too short\n")); | |
1636 | return; | |
1637 | } | |
1ab1457c | 1638 | |
1da177e4 LT |
1639 | /* |
1640 | * Validation checks ([ADDRCONF], page 19) | |
1641 | */ | |
1642 | ||
1643 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1644 | ||
1645 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1646 | return; | |
1647 | ||
1648 | valid_lft = ntohl(pinfo->valid); | |
1649 | prefered_lft = ntohl(pinfo->prefered); | |
1650 | ||
1651 | if (prefered_lft > valid_lft) { | |
1652 | if (net_ratelimit()) | |
1653 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1654 | return; | |
1655 | } | |
1656 | ||
1657 | in6_dev = in6_dev_get(dev); | |
1658 | ||
1659 | if (in6_dev == NULL) { | |
1660 | if (net_ratelimit()) | |
1661 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Two things going on here: | |
1667 | * 1) Add routes for on-link prefixes | |
1668 | * 2) Configure prefixes with the auto flag set | |
1669 | */ | |
1670 | ||
1671 | /* Avoid arithmetic overflow. Really, we could | |
1672 | save rt_expires in seconds, likely valid_lft, | |
1673 | but it would require division in fib gc, that it | |
1674 | not good. | |
1675 | */ | |
1676 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1677 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1678 | else |
3dd4bc68 YH |
1679 | rt_expires = valid_lft * HZ; |
1680 | ||
1681 | /* | |
1682 | * We convert this (in jiffies) to clock_t later. | |
1683 | * Avoid arithmetic overflow there as well. | |
1684 | * Overflow can happen only if HZ < USER_HZ. | |
1685 | */ | |
1686 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1687 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1688 | |
1689 | if (pinfo->onlink) { | |
1690 | struct rt6_info *rt; | |
1691 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1692 | ||
1693 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1694 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1695 | if (valid_lft == 0) { | |
e0a1ad73 | 1696 | ip6_del_rt(rt); |
1da177e4 LT |
1697 | rt = NULL; |
1698 | } else { | |
3dd4bc68 | 1699 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1700 | } |
1701 | } | |
1702 | } else if (valid_lft) { | |
1703 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1704 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1705 | } |
1706 | if (rt) | |
1707 | dst_release(&rt->u.dst); | |
1708 | } | |
1709 | ||
1710 | /* Try to figure out our local address for this prefix */ | |
1711 | ||
1712 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1713 | struct inet6_ifaddr * ifp; | |
1714 | struct in6_addr addr; | |
1715 | int create = 0, update_lft = 0; | |
1716 | ||
1717 | if (pinfo->prefix_len == 64) { | |
1718 | memcpy(&addr, &pinfo->prefix, 8); | |
1719 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1720 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1721 | in6_dev_put(in6_dev); | |
1722 | return; | |
1723 | } | |
1724 | goto ok; | |
1725 | } | |
1726 | if (net_ratelimit()) | |
1727 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1728 | pinfo->prefix_len); | |
1729 | in6_dev_put(in6_dev); | |
1730 | return; | |
1731 | ||
1732 | ok: | |
1733 | ||
1734 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1735 | ||
1736 | if (ifp == NULL && valid_lft) { | |
1737 | int max_addresses = in6_dev->cnf.max_addresses; | |
1738 | ||
1739 | /* Do not allow to create too much of autoconfigured | |
1740 | * addresses; this would be too easy way to crash kernel. | |
1741 | */ | |
1742 | if (!max_addresses || | |
1743 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1744 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1745 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1746 | ||
1747 | if (!ifp || IS_ERR(ifp)) { | |
1748 | in6_dev_put(in6_dev); | |
1749 | return; | |
1750 | } | |
1751 | ||
1752 | update_lft = create = 1; | |
1753 | ifp->cstamp = jiffies; | |
1754 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1755 | } | |
1756 | ||
1757 | if (ifp) { | |
1758 | int flags; | |
1759 | unsigned long now; | |
1760 | #ifdef CONFIG_IPV6_PRIVACY | |
1761 | struct inet6_ifaddr *ift; | |
1762 | #endif | |
1763 | u32 stored_lft; | |
1764 | ||
1765 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1766 | spin_lock(&ifp->lock); | |
1767 | now = jiffies; | |
1768 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1769 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1770 | else | |
1771 | stored_lft = 0; | |
1772 | if (!update_lft && stored_lft) { | |
1773 | if (valid_lft > MIN_VALID_LIFETIME || | |
1774 | valid_lft > stored_lft) | |
1775 | update_lft = 1; | |
1776 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1777 | /* valid_lft <= stored_lft is always true */ | |
1778 | /* XXX: IPsec */ | |
1779 | update_lft = 0; | |
1780 | } else { | |
1781 | valid_lft = MIN_VALID_LIFETIME; | |
1782 | if (valid_lft < prefered_lft) | |
1783 | prefered_lft = valid_lft; | |
1784 | update_lft = 1; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | if (update_lft) { | |
1789 | ifp->valid_lft = valid_lft; | |
1790 | ifp->prefered_lft = prefered_lft; | |
1791 | ifp->tstamp = now; | |
1792 | flags = ifp->flags; | |
1793 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1794 | spin_unlock(&ifp->lock); | |
1795 | ||
1796 | if (!(flags&IFA_F_TENTATIVE)) | |
1797 | ipv6_ifa_notify(0, ifp); | |
1798 | } else | |
1799 | spin_unlock(&ifp->lock); | |
1800 | ||
1801 | #ifdef CONFIG_IPV6_PRIVACY | |
1802 | read_lock_bh(&in6_dev->lock); | |
1803 | /* update all temporary addresses in the list */ | |
1804 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1805 | /* | |
1806 | * When adjusting the lifetimes of an existing | |
1807 | * temporary address, only lower the lifetimes. | |
1808 | * Implementations must not increase the | |
1809 | * lifetimes of an existing temporary address | |
1810 | * when processing a Prefix Information Option. | |
1811 | */ | |
1812 | spin_lock(&ift->lock); | |
1813 | flags = ift->flags; | |
1814 | if (ift->valid_lft > valid_lft && | |
1815 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1816 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1817 | if (ift->prefered_lft > prefered_lft && | |
1818 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1819 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1820 | spin_unlock(&ift->lock); | |
1821 | if (!(flags&IFA_F_TENTATIVE)) | |
1822 | ipv6_ifa_notify(0, ift); | |
1823 | } | |
1824 | ||
1825 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1826 | /* | |
1827 | * When a new public address is created as described in [ADDRCONF], | |
1828 | * also create a new temporary address. | |
1829 | */ | |
1ab1457c | 1830 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1831 | ipv6_create_tempaddr(ifp, NULL); |
1832 | } else { | |
1833 | read_unlock_bh(&in6_dev->lock); | |
1834 | } | |
1835 | #endif | |
1836 | in6_ifa_put(ifp); | |
1837 | addrconf_verify(0); | |
1838 | } | |
1839 | } | |
1840 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1841 | in6_dev_put(in6_dev); | |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * Set destination address. | |
1846 | * Special case for SIT interfaces where we create a new "virtual" | |
1847 | * device. | |
1848 | */ | |
1849 | int addrconf_set_dstaddr(void __user *arg) | |
1850 | { | |
1851 | struct in6_ifreq ireq; | |
1852 | struct net_device *dev; | |
1853 | int err = -EINVAL; | |
1854 | ||
1855 | rtnl_lock(); | |
1856 | ||
1857 | err = -EFAULT; | |
1858 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1859 | goto err_exit; | |
1860 | ||
1861 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1862 | ||
1863 | err = -ENODEV; | |
1864 | if (dev == NULL) | |
1865 | goto err_exit; | |
1866 | ||
0be669bb | 1867 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1868 | if (dev->type == ARPHRD_SIT) { |
1869 | struct ifreq ifr; | |
1870 | mm_segment_t oldfs; | |
1871 | struct ip_tunnel_parm p; | |
1872 | ||
1873 | err = -EADDRNOTAVAIL; | |
1874 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1875 | goto err_exit; | |
1876 | ||
1877 | memset(&p, 0, sizeof(p)); | |
1878 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1879 | p.iph.saddr = 0; | |
1880 | p.iph.version = 4; | |
1881 | p.iph.ihl = 5; | |
1882 | p.iph.protocol = IPPROTO_IPV6; | |
1883 | p.iph.ttl = 64; | |
1884 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1885 | ||
1886 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1887 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1888 | set_fs(oldfs); | |
1889 | ||
1890 | if (err == 0) { | |
1891 | err = -ENOBUFS; | |
1892 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1893 | goto err_exit; | |
1894 | err = dev_open(dev); | |
1895 | } | |
1896 | } | |
0be669bb | 1897 | #endif |
1da177e4 LT |
1898 | |
1899 | err_exit: | |
1900 | rtnl_unlock(); | |
1901 | return err; | |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * Manual configuration of address on an interface | |
1906 | */ | |
0778769d | 1907 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1908 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1909 | { |
1910 | struct inet6_ifaddr *ifp; | |
1911 | struct inet6_dev *idev; | |
1912 | struct net_device *dev; | |
1913 | int scope; | |
1914 | ||
1915 | ASSERT_RTNL(); | |
1ab1457c | 1916 | |
0778769d NT |
1917 | /* check the lifetime */ |
1918 | if (!valid_lft || prefered_lft > valid_lft) | |
1919 | return -EINVAL; | |
1920 | ||
1da177e4 LT |
1921 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1922 | return -ENODEV; | |
1ab1457c | 1923 | |
1da177e4 LT |
1924 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1925 | return -ENOBUFS; | |
1926 | ||
1927 | scope = ipv6_addr_scope(pfx); | |
1928 | ||
0778769d NT |
1929 | if (valid_lft == INFINITY_LIFE_TIME) |
1930 | ifa_flags |= IFA_F_PERMANENT; | |
1931 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
1932 | valid_lft = 0x7FFFFFFF/HZ; | |
1933 | ||
1934 | if (prefered_lft == 0) | |
1935 | ifa_flags |= IFA_F_DEPRECATED; | |
1936 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1937 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1938 | prefered_lft = 0x7FFFFFFF/HZ; | |
1939 | ||
1940 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1941 | ||
1da177e4 | 1942 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1943 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1944 | ifp->valid_lft = valid_lft; |
1945 | ifp->prefered_lft = prefered_lft; | |
1946 | ifp->tstamp = jiffies; | |
06aebfb7 | 1947 | spin_unlock_bh(&ifp->lock); |
0778769d | 1948 | |
1da177e4 LT |
1949 | addrconf_dad_start(ifp, 0); |
1950 | in6_ifa_put(ifp); | |
0778769d | 1951 | addrconf_verify(0); |
1da177e4 LT |
1952 | return 0; |
1953 | } | |
1954 | ||
1955 | return PTR_ERR(ifp); | |
1956 | } | |
1957 | ||
1958 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1959 | { | |
1960 | struct inet6_ifaddr *ifp; | |
1961 | struct inet6_dev *idev; | |
1962 | struct net_device *dev; | |
1ab1457c | 1963 | |
1da177e4 LT |
1964 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1965 | return -ENODEV; | |
1966 | ||
1967 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1968 | return -ENXIO; | |
1969 | ||
1970 | read_lock_bh(&idev->lock); | |
1971 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1972 | if (ifp->prefix_len == plen && | |
1973 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1974 | in6_ifa_hold(ifp); | |
1975 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1976 | |
1da177e4 LT |
1977 | ipv6_del_addr(ifp); |
1978 | ||
1979 | /* If the last address is deleted administratively, | |
1980 | disable IPv6 on this interface. | |
1981 | */ | |
1982 | if (idev->addr_list == NULL) | |
1983 | addrconf_ifdown(idev->dev, 1); | |
1984 | return 0; | |
1985 | } | |
1986 | } | |
1987 | read_unlock_bh(&idev->lock); | |
1988 | return -EADDRNOTAVAIL; | |
1989 | } | |
1990 | ||
1991 | ||
1992 | int addrconf_add_ifaddr(void __user *arg) | |
1993 | { | |
1994 | struct in6_ifreq ireq; | |
1995 | int err; | |
1ab1457c | 1996 | |
1da177e4 LT |
1997 | if (!capable(CAP_NET_ADMIN)) |
1998 | return -EPERM; | |
1ab1457c | 1999 | |
1da177e4 LT |
2000 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2001 | return -EFAULT; | |
2002 | ||
2003 | rtnl_lock(); | |
0778769d | 2004 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 2005 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
2006 | rtnl_unlock(); |
2007 | return err; | |
2008 | } | |
2009 | ||
2010 | int addrconf_del_ifaddr(void __user *arg) | |
2011 | { | |
2012 | struct in6_ifreq ireq; | |
2013 | int err; | |
1ab1457c | 2014 | |
1da177e4 LT |
2015 | if (!capable(CAP_NET_ADMIN)) |
2016 | return -EPERM; | |
2017 | ||
2018 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2019 | return -EFAULT; | |
2020 | ||
2021 | rtnl_lock(); | |
2022 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2023 | rtnl_unlock(); | |
2024 | return err; | |
2025 | } | |
2026 | ||
0be669bb | 2027 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2028 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2029 | { | |
2030 | struct inet6_ifaddr * ifp; | |
2031 | struct in6_addr addr; | |
2032 | struct net_device *dev; | |
2033 | int scope; | |
2034 | ||
2035 | ASSERT_RTNL(); | |
2036 | ||
2037 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2038 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2039 | ||
2040 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2041 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2042 | scope = IFA_LINK; | |
2043 | } else { | |
2044 | scope = IPV6_ADDR_COMPATv4; | |
2045 | } | |
2046 | ||
2047 | if (addr.s6_addr32[3]) { | |
2048 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2049 | if (!IS_ERR(ifp)) { | |
2050 | spin_lock_bh(&ifp->lock); | |
2051 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2052 | spin_unlock_bh(&ifp->lock); | |
2053 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2054 | in6_ifa_put(ifp); | |
2055 | } | |
2056 | return; | |
2057 | } | |
2058 | ||
1ab1457c | 2059 | for (dev = dev_base; dev != NULL; dev = dev->next) { |
e5ed6399 | 2060 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2061 | if (in_dev && (dev->flags & IFF_UP)) { |
2062 | struct in_ifaddr * ifa; | |
2063 | ||
2064 | int flag = scope; | |
2065 | ||
2066 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2067 | int plen; | |
2068 | ||
2069 | addr.s6_addr32[3] = ifa->ifa_local; | |
2070 | ||
2071 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2072 | continue; | |
2073 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2074 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2075 | continue; | |
2076 | flag |= IFA_HOST; | |
2077 | } | |
2078 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2079 | plen = 64; | |
2080 | else | |
2081 | plen = 96; | |
2082 | ||
2083 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2084 | IFA_F_PERMANENT); | |
2085 | if (!IS_ERR(ifp)) { | |
2086 | spin_lock_bh(&ifp->lock); | |
2087 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2088 | spin_unlock_bh(&ifp->lock); | |
2089 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2090 | in6_ifa_put(ifp); | |
2091 | } | |
2092 | } | |
2093 | } | |
1ab1457c | 2094 | } |
1da177e4 | 2095 | } |
0be669bb | 2096 | #endif |
1da177e4 LT |
2097 | |
2098 | static void init_loopback(struct net_device *dev) | |
2099 | { | |
2100 | struct inet6_dev *idev; | |
2101 | struct inet6_ifaddr * ifp; | |
2102 | ||
2103 | /* ::1 */ | |
2104 | ||
2105 | ASSERT_RTNL(); | |
2106 | ||
2107 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2108 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2109 | return; | |
2110 | } | |
2111 | ||
2112 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2113 | if (!IS_ERR(ifp)) { | |
2114 | spin_lock_bh(&ifp->lock); | |
2115 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2116 | spin_unlock_bh(&ifp->lock); | |
2117 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2118 | in6_ifa_put(ifp); | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2123 | { | |
2124 | struct inet6_ifaddr * ifp; | |
2125 | ||
2126 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2127 | if (!IS_ERR(ifp)) { | |
2128 | addrconf_dad_start(ifp, 0); | |
2129 | in6_ifa_put(ifp); | |
2130 | } | |
2131 | } | |
2132 | ||
2133 | static void addrconf_dev_config(struct net_device *dev) | |
2134 | { | |
2135 | struct in6_addr addr; | |
2136 | struct inet6_dev * idev; | |
2137 | ||
2138 | ASSERT_RTNL(); | |
2139 | ||
1ab1457c | 2140 | if ((dev->type != ARPHRD_ETHER) && |
1da177e4 LT |
2141 | (dev->type != ARPHRD_FDDI) && |
2142 | (dev->type != ARPHRD_IEEE802_TR) && | |
2143 | (dev->type != ARPHRD_ARCNET) && | |
2144 | (dev->type != ARPHRD_INFINIBAND)) { | |
2145 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2146 | return; | |
2147 | } | |
2148 | ||
2149 | idev = addrconf_add_dev(dev); | |
2150 | if (idev == NULL) | |
2151 | return; | |
2152 | ||
2153 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2154 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2155 | ||
2156 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2157 | addrconf_add_linklocal(idev, &addr); | |
2158 | } | |
2159 | ||
0be669bb | 2160 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2161 | static void addrconf_sit_config(struct net_device *dev) |
2162 | { | |
2163 | struct inet6_dev *idev; | |
2164 | ||
2165 | ASSERT_RTNL(); | |
2166 | ||
1ab1457c YH |
2167 | /* |
2168 | * Configure the tunnel with one of our IPv4 | |
2169 | * addresses... we should configure all of | |
1da177e4 LT |
2170 | * our v4 addrs in the tunnel |
2171 | */ | |
2172 | ||
2173 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2174 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2175 | return; | |
2176 | } | |
2177 | ||
2178 | sit_add_v4_addrs(idev); | |
2179 | ||
2180 | if (dev->flags&IFF_POINTOPOINT) { | |
2181 | addrconf_add_mroute(dev); | |
2182 | addrconf_add_lroute(dev); | |
2183 | } else | |
2184 | sit_route_add(dev); | |
2185 | } | |
0be669bb | 2186 | #endif |
1da177e4 LT |
2187 | |
2188 | static inline int | |
2189 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2190 | { | |
2191 | struct in6_addr lladdr; | |
2192 | ||
2193 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2194 | addrconf_add_linklocal(idev, &lladdr); | |
2195 | return 0; | |
2196 | } | |
2197 | return -1; | |
2198 | } | |
2199 | ||
2200 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2201 | { | |
2202 | struct net_device *link_dev; | |
2203 | ||
2204 | /* first try to inherit the link-local address from the link device */ | |
2205 | if (idev->dev->iflink && | |
2206 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2207 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2208 | return; | |
2209 | } | |
2210 | /* then try to inherit it from any device */ | |
2211 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2212 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2213 | return; | |
2214 | } | |
2215 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2216 | } | |
2217 | ||
2218 | /* | |
2219 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2220 | * DHCPv6, MLD etc. can be run over the virtual link | |
2221 | */ | |
2222 | ||
2223 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2224 | { | |
2225 | struct inet6_dev *idev; | |
2226 | ||
2227 | ASSERT_RTNL(); | |
2228 | ||
2229 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2230 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2231 | return; | |
2232 | } | |
2233 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2234 | } |
2235 | ||
1ab1457c | 2236 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2237 | void * data) |
2238 | { | |
2239 | struct net_device *dev = (struct net_device *) data; | |
2240 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2241 | int run_pending = 0; |
1da177e4 LT |
2242 | |
2243 | switch(event) { | |
2244 | case NETDEV_UP: | |
3c21edbd YH |
2245 | case NETDEV_CHANGE: |
2246 | if (event == NETDEV_UP) { | |
2247 | if (!netif_carrier_ok(dev)) { | |
2248 | /* device is not ready yet. */ | |
2249 | printk(KERN_INFO | |
2250 | "ADDRCONF(NETDEV_UP): %s: " | |
2251 | "link is not ready\n", | |
2252 | dev->name); | |
2253 | break; | |
2254 | } | |
99081049 KS |
2255 | |
2256 | if (idev) | |
2257 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2258 | } else { |
2259 | if (!netif_carrier_ok(dev)) { | |
2260 | /* device is still not ready. */ | |
2261 | break; | |
2262 | } | |
2263 | ||
2264 | if (idev) { | |
2265 | if (idev->if_flags & IF_READY) { | |
2266 | /* device is already configured. */ | |
2267 | break; | |
2268 | } | |
2269 | idev->if_flags |= IF_READY; | |
2270 | } | |
2271 | ||
2272 | printk(KERN_INFO | |
2273 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2274 | "link becomes ready\n", | |
2275 | dev->name); | |
2276 | ||
c5e33bdd | 2277 | run_pending = 1; |
3c21edbd YH |
2278 | } |
2279 | ||
1da177e4 | 2280 | switch(dev->type) { |
0be669bb | 2281 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2282 | case ARPHRD_SIT: |
2283 | addrconf_sit_config(dev); | |
2284 | break; | |
0be669bb | 2285 | #endif |
1da177e4 LT |
2286 | case ARPHRD_TUNNEL6: |
2287 | addrconf_ip6_tnl_config(dev); | |
2288 | break; | |
2289 | case ARPHRD_LOOPBACK: | |
2290 | init_loopback(dev); | |
2291 | break; | |
2292 | ||
2293 | default: | |
2294 | addrconf_dev_config(dev); | |
2295 | break; | |
2296 | }; | |
2297 | if (idev) { | |
c5e33bdd YH |
2298 | if (run_pending) |
2299 | addrconf_dad_run(idev); | |
2300 | ||
1da177e4 LT |
2301 | /* If the MTU changed during the interface down, when the |
2302 | interface up, the changed MTU must be reflected in the | |
2303 | idev as well as routers. | |
2304 | */ | |
2305 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2306 | rt6_mtu_change(dev, dev->mtu); | |
2307 | idev->cnf.mtu6 = dev->mtu; | |
2308 | } | |
2309 | idev->tstamp = jiffies; | |
2310 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2311 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2312 | stop IPv6 on this interface. | |
2313 | */ | |
2314 | if (dev->mtu < IPV6_MIN_MTU) | |
2315 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2316 | } | |
2317 | break; | |
2318 | ||
2319 | case NETDEV_CHANGEMTU: | |
2320 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2321 | rt6_mtu_change(dev, dev->mtu); | |
2322 | idev->cnf.mtu6 = dev->mtu; | |
2323 | break; | |
2324 | } | |
2325 | ||
2326 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2327 | ||
2328 | case NETDEV_DOWN: | |
2329 | case NETDEV_UNREGISTER: | |
2330 | /* | |
2331 | * Remove all addresses from this interface. | |
2332 | */ | |
2333 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2334 | break; | |
3c21edbd | 2335 | |
1da177e4 LT |
2336 | case NETDEV_CHANGENAME: |
2337 | #ifdef CONFIG_SYSCTL | |
2338 | if (idev) { | |
2339 | addrconf_sysctl_unregister(&idev->cnf); | |
2340 | neigh_sysctl_unregister(idev->nd_parms); | |
2341 | neigh_sysctl_register(dev, idev->nd_parms, | |
2342 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2343 | &ndisc_ifinfo_sysctl_change, | |
2344 | NULL); | |
2345 | addrconf_sysctl_register(idev, &idev->cnf); | |
2346 | } | |
2347 | #endif | |
2348 | break; | |
2349 | }; | |
2350 | ||
2351 | return NOTIFY_OK; | |
2352 | } | |
2353 | ||
2354 | /* | |
2355 | * addrconf module should be notified of a device going up | |
2356 | */ | |
2357 | static struct notifier_block ipv6_dev_notf = { | |
2358 | .notifier_call = addrconf_notify, | |
2359 | .priority = 0 | |
2360 | }; | |
2361 | ||
2362 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2363 | { | |
2364 | struct inet6_dev *idev; | |
2365 | struct inet6_ifaddr *ifa, **bifa; | |
2366 | int i; | |
2367 | ||
2368 | ASSERT_RTNL(); | |
2369 | ||
2370 | if (dev == &loopback_dev && how == 1) | |
2371 | how = 0; | |
2372 | ||
2373 | rt6_ifdown(dev); | |
2374 | neigh_ifdown(&nd_tbl, dev); | |
2375 | ||
2376 | idev = __in6_dev_get(dev); | |
2377 | if (idev == NULL) | |
2378 | return -ENODEV; | |
2379 | ||
2380 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2381 | Do not dev_put! |
1da177e4 LT |
2382 | */ |
2383 | if (how == 1) { | |
1da177e4 | 2384 | idev->dead = 1; |
8814c4b5 YH |
2385 | |
2386 | /* protected by rtnl_lock */ | |
2387 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2388 | |
2389 | /* Step 1.5: remove snmp6 entry */ | |
2390 | snmp6_unregister_dev(idev); | |
2391 | ||
2392 | } | |
2393 | ||
2394 | /* Step 2: clear hash table */ | |
2395 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2396 | bifa = &inet6_addr_lst[i]; | |
2397 | ||
2398 | write_lock_bh(&addrconf_hash_lock); | |
2399 | while ((ifa = *bifa) != NULL) { | |
2400 | if (ifa->idev == idev) { | |
2401 | *bifa = ifa->lst_next; | |
2402 | ifa->lst_next = NULL; | |
2403 | addrconf_del_timer(ifa); | |
2404 | in6_ifa_put(ifa); | |
2405 | continue; | |
2406 | } | |
2407 | bifa = &ifa->lst_next; | |
2408 | } | |
2409 | write_unlock_bh(&addrconf_hash_lock); | |
2410 | } | |
2411 | ||
2412 | write_lock_bh(&idev->lock); | |
2413 | ||
2414 | /* Step 3: clear flags for stateless addrconf */ | |
2415 | if (how != 1) | |
3c21edbd | 2416 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2417 | |
2418 | /* Step 4: clear address list */ | |
2419 | #ifdef CONFIG_IPV6_PRIVACY | |
2420 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2421 | in6_dev_put(idev); | |
2422 | ||
2423 | /* clear tempaddr list */ | |
2424 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2425 | idev->tempaddr_list = ifa->tmp_next; | |
2426 | ifa->tmp_next = NULL; | |
2427 | ifa->dead = 1; | |
2428 | write_unlock_bh(&idev->lock); | |
2429 | spin_lock_bh(&ifa->lock); | |
2430 | ||
2431 | if (ifa->ifpub) { | |
2432 | in6_ifa_put(ifa->ifpub); | |
2433 | ifa->ifpub = NULL; | |
2434 | } | |
2435 | spin_unlock_bh(&ifa->lock); | |
2436 | in6_ifa_put(ifa); | |
2437 | write_lock_bh(&idev->lock); | |
2438 | } | |
2439 | #endif | |
2440 | while ((ifa = idev->addr_list) != NULL) { | |
2441 | idev->addr_list = ifa->if_next; | |
2442 | ifa->if_next = NULL; | |
2443 | ifa->dead = 1; | |
2444 | addrconf_del_timer(ifa); | |
2445 | write_unlock_bh(&idev->lock); | |
2446 | ||
2447 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2448 | in6_ifa_put(ifa); | |
2449 | ||
2450 | write_lock_bh(&idev->lock); | |
2451 | } | |
2452 | write_unlock_bh(&idev->lock); | |
2453 | ||
2454 | /* Step 5: Discard multicast list */ | |
2455 | ||
2456 | if (how == 1) | |
2457 | ipv6_mc_destroy_dev(idev); | |
2458 | else | |
2459 | ipv6_mc_down(idev); | |
2460 | ||
2461 | /* Step 5: netlink notification of this interface */ | |
2462 | idev->tstamp = jiffies; | |
979ad663 | 2463 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2464 | |
1da177e4 LT |
2465 | /* Shot the device (if unregistered) */ |
2466 | ||
2467 | if (how == 1) { | |
2468 | #ifdef CONFIG_SYSCTL | |
2469 | addrconf_sysctl_unregister(&idev->cnf); | |
2470 | neigh_sysctl_unregister(idev->nd_parms); | |
2471 | #endif | |
2472 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2473 | neigh_ifdown(&nd_tbl, dev); | |
2474 | in6_dev_put(idev); | |
2475 | } | |
2476 | return 0; | |
2477 | } | |
2478 | ||
2479 | static void addrconf_rs_timer(unsigned long data) | |
2480 | { | |
2481 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2482 | ||
2483 | if (ifp->idev->cnf.forwarding) | |
2484 | goto out; | |
2485 | ||
2486 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2487 | /* | |
2488 | * Announcement received after solicitation | |
2489 | * was sent | |
2490 | */ | |
2491 | goto out; | |
2492 | } | |
2493 | ||
2494 | spin_lock(&ifp->lock); | |
2495 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2496 | struct in6_addr all_routers; | |
2497 | ||
2498 | /* The wait after the last probe can be shorter */ | |
2499 | addrconf_mod_timer(ifp, AC_RS, | |
2500 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2501 | ifp->idev->cnf.rtr_solicit_delay : | |
2502 | ifp->idev->cnf.rtr_solicit_interval); | |
2503 | spin_unlock(&ifp->lock); | |
2504 | ||
2505 | ipv6_addr_all_routers(&all_routers); | |
2506 | ||
2507 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2508 | } else { | |
2509 | spin_unlock(&ifp->lock); | |
2510 | /* | |
2511 | * Note: we do not support deprecated "all on-link" | |
2512 | * assumption any longer. | |
2513 | */ | |
2514 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2515 | ifp->idev->dev->name); | |
2516 | } | |
2517 | ||
2518 | out: | |
2519 | in6_ifa_put(ifp); | |
2520 | } | |
2521 | ||
2522 | /* | |
2523 | * Duplicate Address Detection | |
2524 | */ | |
3c21edbd YH |
2525 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2526 | { | |
2527 | unsigned long rand_num; | |
2528 | struct inet6_dev *idev = ifp->idev; | |
2529 | ||
2530 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2531 | ifp->probes = idev->cnf.dad_transmits; | |
2532 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2533 | } | |
2534 | ||
e431b8c0 | 2535 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2536 | { |
2537 | struct inet6_dev *idev = ifp->idev; | |
2538 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2539 | |
2540 | addrconf_join_solict(dev, &ifp->addr); | |
2541 | ||
2542 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2543 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2544 | flags); | |
2545 | ||
2546 | net_srandom(ifp->addr.s6_addr32[3]); | |
1da177e4 LT |
2547 | |
2548 | read_lock_bh(&idev->lock); | |
2549 | if (ifp->dead) | |
2550 | goto out; | |
2551 | spin_lock_bh(&ifp->lock); | |
2552 | ||
2553 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2554 | !(ifp->flags&IFA_F_TENTATIVE) || |
2555 | ifp->flags & IFA_F_NODAD) { | |
1da177e4 LT |
2556 | ifp->flags &= ~IFA_F_TENTATIVE; |
2557 | spin_unlock_bh(&ifp->lock); | |
2558 | read_unlock_bh(&idev->lock); | |
2559 | ||
2560 | addrconf_dad_completed(ifp); | |
2561 | return; | |
2562 | } | |
2563 | ||
6732bade | 2564 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2565 | spin_unlock_bh(&ifp->lock); |
6732bade | 2566 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2567 | /* |
2568 | * If the defice is not ready: | |
2569 | * - keep it tentative if it is a permanent address. | |
2570 | * - otherwise, kill it. | |
2571 | */ | |
2572 | in6_ifa_hold(ifp); | |
2573 | addrconf_dad_stop(ifp); | |
6732bade | 2574 | return; |
3c21edbd | 2575 | } |
6732bade YH |
2576 | addrconf_dad_kick(ifp); |
2577 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2578 | out: |
2579 | read_unlock_bh(&idev->lock); | |
2580 | } | |
2581 | ||
2582 | static void addrconf_dad_timer(unsigned long data) | |
2583 | { | |
2584 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2585 | struct inet6_dev *idev = ifp->idev; | |
2586 | struct in6_addr unspec; | |
2587 | struct in6_addr mcaddr; | |
2588 | ||
2589 | read_lock_bh(&idev->lock); | |
2590 | if (idev->dead) { | |
2591 | read_unlock_bh(&idev->lock); | |
2592 | goto out; | |
2593 | } | |
2594 | spin_lock_bh(&ifp->lock); | |
2595 | if (ifp->probes == 0) { | |
2596 | /* | |
2597 | * DAD was successful | |
2598 | */ | |
2599 | ||
2600 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2601 | spin_unlock_bh(&ifp->lock); | |
2602 | read_unlock_bh(&idev->lock); | |
2603 | ||
2604 | addrconf_dad_completed(ifp); | |
2605 | ||
2606 | goto out; | |
2607 | } | |
2608 | ||
2609 | ifp->probes--; | |
2610 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2611 | spin_unlock_bh(&ifp->lock); | |
2612 | read_unlock_bh(&idev->lock); | |
2613 | ||
2614 | /* send a neighbour solicitation for our addr */ | |
2615 | memset(&unspec, 0, sizeof(unspec)); | |
2616 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2617 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2618 | out: | |
2619 | in6_ifa_put(ifp); | |
2620 | } | |
2621 | ||
2622 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2623 | { | |
2624 | struct net_device * dev = ifp->idev->dev; | |
2625 | ||
2626 | /* | |
2627 | * Configure the address for reception. Now it is valid. | |
2628 | */ | |
2629 | ||
2630 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2631 | ||
2632 | /* If added prefix is link local and forwarding is off, | |
2633 | start sending router solicitations. | |
2634 | */ | |
2635 | ||
2636 | if (ifp->idev->cnf.forwarding == 0 && | |
2637 | ifp->idev->cnf.rtr_solicits > 0 && | |
2638 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2639 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2640 | struct in6_addr all_routers; | |
2641 | ||
2642 | ipv6_addr_all_routers(&all_routers); | |
2643 | ||
2644 | /* | |
2645 | * If a host as already performed a random delay | |
2646 | * [...] as part of DAD [...] there is no need | |
2647 | * to delay again before sending the first RS | |
2648 | */ | |
2649 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2650 | ||
2651 | spin_lock_bh(&ifp->lock); | |
2652 | ifp->probes = 1; | |
2653 | ifp->idev->if_flags |= IF_RS_SENT; | |
2654 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2655 | spin_unlock_bh(&ifp->lock); | |
2656 | } | |
2657 | } | |
2658 | ||
c5e33bdd YH |
2659 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2660 | struct inet6_ifaddr *ifp; | |
2661 | ||
2662 | read_lock_bh(&idev->lock); | |
2663 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2664 | spin_lock_bh(&ifp->lock); | |
2665 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2666 | spin_unlock_bh(&ifp->lock); | |
2667 | continue; | |
2668 | } | |
2669 | spin_unlock_bh(&ifp->lock); | |
2670 | addrconf_dad_kick(ifp); | |
2671 | } | |
2672 | read_unlock_bh(&idev->lock); | |
2673 | } | |
2674 | ||
1da177e4 LT |
2675 | #ifdef CONFIG_PROC_FS |
2676 | struct if6_iter_state { | |
2677 | int bucket; | |
2678 | }; | |
2679 | ||
2680 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2681 | { | |
2682 | struct inet6_ifaddr *ifa = NULL; | |
2683 | struct if6_iter_state *state = seq->private; | |
2684 | ||
2685 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2686 | ifa = inet6_addr_lst[state->bucket]; | |
2687 | if (ifa) | |
2688 | break; | |
2689 | } | |
2690 | return ifa; | |
2691 | } | |
2692 | ||
2693 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2694 | { | |
2695 | struct if6_iter_state *state = seq->private; | |
2696 | ||
2697 | ifa = ifa->lst_next; | |
2698 | try_again: | |
2699 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2700 | ifa = inet6_addr_lst[state->bucket]; | |
2701 | goto try_again; | |
2702 | } | |
2703 | return ifa; | |
2704 | } | |
2705 | ||
2706 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2707 | { | |
2708 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2709 | ||
2710 | if (ifa) | |
2711 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2712 | --pos; | |
2713 | return pos ? NULL : ifa; | |
2714 | } | |
2715 | ||
2716 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2717 | { | |
2718 | read_lock_bh(&addrconf_hash_lock); | |
2719 | return if6_get_idx(seq, *pos); | |
2720 | } | |
2721 | ||
2722 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2723 | { | |
2724 | struct inet6_ifaddr *ifa; | |
2725 | ||
2726 | ifa = if6_get_next(seq, v); | |
2727 | ++*pos; | |
2728 | return ifa; | |
2729 | } | |
2730 | ||
2731 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2732 | { | |
2733 | read_unlock_bh(&addrconf_hash_lock); | |
2734 | } | |
2735 | ||
2736 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2737 | { | |
2738 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2739 | seq_printf(seq, | |
9343e79a | 2740 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2741 | NIP6(ifp->addr), |
2742 | ifp->idev->dev->ifindex, | |
2743 | ifp->prefix_len, | |
2744 | ifp->scope, | |
2745 | ifp->flags, | |
2746 | ifp->idev->dev->name); | |
2747 | return 0; | |
2748 | } | |
2749 | ||
2750 | static struct seq_operations if6_seq_ops = { | |
2751 | .start = if6_seq_start, | |
2752 | .next = if6_seq_next, | |
2753 | .show = if6_seq_show, | |
2754 | .stop = if6_seq_stop, | |
2755 | }; | |
2756 | ||
2757 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2758 | { | |
2759 | struct seq_file *seq; | |
2760 | int rc = -ENOMEM; | |
322f74a4 | 2761 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2762 | |
2763 | if (!s) | |
2764 | goto out; | |
1da177e4 LT |
2765 | |
2766 | rc = seq_open(file, &if6_seq_ops); | |
2767 | if (rc) | |
2768 | goto out_kfree; | |
2769 | ||
2770 | seq = file->private_data; | |
2771 | seq->private = s; | |
2772 | out: | |
2773 | return rc; | |
2774 | out_kfree: | |
2775 | kfree(s); | |
2776 | goto out; | |
2777 | } | |
2778 | ||
9a32144e | 2779 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2780 | .owner = THIS_MODULE, |
2781 | .open = if6_seq_open, | |
2782 | .read = seq_read, | |
2783 | .llseek = seq_lseek, | |
2784 | .release = seq_release_private, | |
2785 | }; | |
2786 | ||
2787 | int __init if6_proc_init(void) | |
2788 | { | |
2789 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2790 | return -ENOMEM; | |
2791 | return 0; | |
2792 | } | |
2793 | ||
2794 | void if6_proc_exit(void) | |
2795 | { | |
2796 | proc_net_remove("if_inet6"); | |
2797 | } | |
2798 | #endif /* CONFIG_PROC_FS */ | |
2799 | ||
3b9f9a1c NT |
2800 | #ifdef CONFIG_IPV6_MIP6 |
2801 | /* Check if address is a home address configured on any interface. */ | |
2802 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2803 | { | |
2804 | int ret = 0; | |
2805 | struct inet6_ifaddr * ifp; | |
2806 | u8 hash = ipv6_addr_hash(addr); | |
2807 | read_lock_bh(&addrconf_hash_lock); | |
2808 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2809 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2810 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2811 | ret = 1; | |
2812 | break; | |
2813 | } | |
2814 | } | |
2815 | read_unlock_bh(&addrconf_hash_lock); | |
2816 | return ret; | |
2817 | } | |
2818 | #endif | |
2819 | ||
1da177e4 LT |
2820 | /* |
2821 | * Periodic address status verification | |
2822 | */ | |
2823 | ||
2824 | static void addrconf_verify(unsigned long foo) | |
2825 | { | |
2826 | struct inet6_ifaddr *ifp; | |
2827 | unsigned long now, next; | |
2828 | int i; | |
2829 | ||
2830 | spin_lock_bh(&addrconf_verify_lock); | |
2831 | now = jiffies; | |
2832 | next = now + ADDR_CHECK_FREQUENCY; | |
2833 | ||
2834 | del_timer(&addr_chk_timer); | |
2835 | ||
2836 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2837 | ||
2838 | restart: | |
5d5780df | 2839 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2840 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2841 | unsigned long age; | |
2842 | #ifdef CONFIG_IPV6_PRIVACY | |
2843 | unsigned long regen_advance; | |
2844 | #endif | |
2845 | ||
2846 | if (ifp->flags & IFA_F_PERMANENT) | |
2847 | continue; | |
2848 | ||
2849 | spin_lock(&ifp->lock); | |
2850 | age = (now - ifp->tstamp) / HZ; | |
2851 | ||
2852 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2853 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2854 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2855 | ifp->idev->nd_parms->retrans_time / HZ; |
2856 | #endif | |
2857 | ||
8f27ebb9 YH |
2858 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2859 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2860 | spin_unlock(&ifp->lock); |
2861 | in6_ifa_hold(ifp); | |
5d5780df | 2862 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2863 | ipv6_del_addr(ifp); |
2864 | goto restart; | |
8f27ebb9 YH |
2865 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2866 | spin_unlock(&ifp->lock); | |
2867 | continue; | |
1da177e4 LT |
2868 | } else if (age >= ifp->prefered_lft) { |
2869 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2870 | int deprecate = 0; | |
2871 | ||
2872 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2873 | deprecate = 1; | |
2874 | ifp->flags |= IFA_F_DEPRECATED; | |
2875 | } | |
2876 | ||
2877 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2878 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2879 | ||
2880 | spin_unlock(&ifp->lock); | |
2881 | ||
2882 | if (deprecate) { | |
2883 | in6_ifa_hold(ifp); | |
5d5780df | 2884 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2885 | |
2886 | ipv6_ifa_notify(0, ifp); | |
2887 | in6_ifa_put(ifp); | |
2888 | goto restart; | |
2889 | } | |
2890 | #ifdef CONFIG_IPV6_PRIVACY | |
2891 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2892 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2893 | if (age >= ifp->prefered_lft - regen_advance) { | |
2894 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2895 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2896 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2897 | if (!ifp->regen_count && ifpub) { | |
2898 | ifp->regen_count++; | |
2899 | in6_ifa_hold(ifp); | |
2900 | in6_ifa_hold(ifpub); | |
2901 | spin_unlock(&ifp->lock); | |
5d5780df | 2902 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2903 | spin_lock(&ifpub->lock); |
2904 | ifpub->regen_count = 0; | |
2905 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2906 | ipv6_create_tempaddr(ifpub, ifp); |
2907 | in6_ifa_put(ifpub); | |
2908 | in6_ifa_put(ifp); | |
2909 | goto restart; | |
2910 | } | |
2911 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2912 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2913 | spin_unlock(&ifp->lock); | |
2914 | #endif | |
2915 | } else { | |
2916 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2917 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2918 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2919 | spin_unlock(&ifp->lock); | |
2920 | } | |
2921 | } | |
5d5780df | 2922 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2923 | } |
2924 | ||
2925 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2926 | add_timer(&addr_chk_timer); | |
2927 | spin_unlock_bh(&addrconf_verify_lock); | |
2928 | } | |
2929 | ||
461d8837 TG |
2930 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2931 | { | |
2932 | struct in6_addr *pfx = NULL; | |
2933 | ||
2934 | if (addr) | |
2935 | pfx = nla_data(addr); | |
2936 | ||
2937 | if (local) { | |
2938 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2939 | pfx = NULL; | |
2940 | else | |
2941 | pfx = nla_data(local); | |
2942 | } | |
2943 | ||
2944 | return pfx; | |
2945 | } | |
2946 | ||
2947 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2948 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2949 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2950 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2951 | }; | |
2952 | ||
1da177e4 LT |
2953 | static int |
2954 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2955 | { | |
b933f716 TG |
2956 | struct ifaddrmsg *ifm; |
2957 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2958 | struct in6_addr *pfx; |
b933f716 | 2959 | int err; |
1da177e4 | 2960 | |
b933f716 TG |
2961 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2962 | if (err < 0) | |
2963 | return err; | |
2964 | ||
2965 | ifm = nlmsg_data(nlh); | |
2966 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2967 | if (pfx == NULL) |
2968 | return -EINVAL; | |
2969 | ||
2970 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2971 | } | |
2972 | ||
55ebaef1 NT |
2973 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
2974 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 2975 | { |
081bba5b NT |
2976 | if (!valid_lft || (prefered_lft > valid_lft)) |
2977 | return -EINVAL; | |
2978 | ||
081bba5b | 2979 | if (valid_lft == INFINITY_LIFE_TIME) |
55ebaef1 | 2980 | ifa_flags |= IFA_F_PERMANENT; |
081bba5b NT |
2981 | else if (valid_lft >= 0x7FFFFFFF/HZ) |
2982 | valid_lft = 0x7FFFFFFF/HZ; | |
2983 | ||
2984 | if (prefered_lft == 0) | |
55ebaef1 | 2985 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
2986 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
2987 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2988 | prefered_lft = 0x7FFFFFFF/HZ; | |
2989 | ||
2990 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 2991 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
2992 | ifp->tstamp = jiffies; |
2993 | ifp->valid_lft = valid_lft; | |
2994 | ifp->prefered_lft = prefered_lft; | |
2995 | ||
2996 | spin_unlock_bh(&ifp->lock); | |
2997 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2998 | ipv6_ifa_notify(0, ifp); | |
081bba5b NT |
2999 | |
3000 | addrconf_verify(0); | |
3001 | ||
3002 | return 0; | |
3003 | } | |
3004 | ||
1da177e4 LT |
3005 | static int |
3006 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3007 | { | |
461d8837 TG |
3008 | struct ifaddrmsg *ifm; |
3009 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3010 | struct in6_addr *pfx; |
7198f8ce TG |
3011 | struct inet6_ifaddr *ifa; |
3012 | struct net_device *dev; | |
55ebaef1 NT |
3013 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3014 | u8 ifa_flags; | |
461d8837 | 3015 | int err; |
1da177e4 | 3016 | |
461d8837 TG |
3017 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3018 | if (err < 0) | |
3019 | return err; | |
3020 | ||
3021 | ifm = nlmsg_data(nlh); | |
3022 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3023 | if (pfx == NULL) |
3024 | return -EINVAL; | |
3025 | ||
461d8837 | 3026 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3027 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3028 | |
3029 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3030 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3031 | preferred_lft = ci->ifa_prefered; |
3032 | } else { | |
3033 | preferred_lft = INFINITY_LIFE_TIME; | |
3034 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3035 | } |
3036 | ||
7198f8ce TG |
3037 | dev = __dev_get_by_index(ifm->ifa_index); |
3038 | if (dev == NULL) | |
3039 | return -ENODEV; | |
3040 | ||
55ebaef1 | 3041 | /* We ignore other flags so far. */ |
3b9f9a1c | 3042 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3043 | |
7198f8ce TG |
3044 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3045 | if (ifa == NULL) { | |
3046 | /* | |
3047 | * It would be best to check for !NLM_F_CREATE here but | |
3048 | * userspace alreay relies on not having to provide this. | |
3049 | */ | |
3050 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3051 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3052 | } |
3053 | ||
7198f8ce TG |
3054 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3055 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3056 | err = -EEXIST; | |
3057 | else | |
55ebaef1 | 3058 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3059 | |
3060 | in6_ifa_put(ifa); | |
3061 | ||
3062 | return err; | |
1da177e4 LT |
3063 | } |
3064 | ||
101bb229 TG |
3065 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3066 | u8 scope, int ifindex) | |
3067 | { | |
3068 | struct ifaddrmsg *ifm; | |
3069 | ||
3070 | ifm = nlmsg_data(nlh); | |
3071 | ifm->ifa_family = AF_INET6; | |
3072 | ifm->ifa_prefixlen = prefixlen; | |
3073 | ifm->ifa_flags = flags; | |
3074 | ifm->ifa_scope = scope; | |
3075 | ifm->ifa_index = ifindex; | |
3076 | } | |
3077 | ||
85486af0 TG |
3078 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3079 | unsigned long tstamp, u32 preferred, u32 valid) | |
3080 | { | |
3081 | struct ifa_cacheinfo ci; | |
3082 | ||
3083 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3084 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3085 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3086 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3087 | ci.ifa_prefered = preferred; | |
3088 | ci.ifa_valid = valid; | |
3089 | ||
3090 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3091 | } | |
3092 | ||
101bb229 TG |
3093 | static inline int rt_scope(int ifa_scope) |
3094 | { | |
3095 | if (ifa_scope & IFA_HOST) | |
3096 | return RT_SCOPE_HOST; | |
3097 | else if (ifa_scope & IFA_LINK) | |
3098 | return RT_SCOPE_LINK; | |
3099 | else if (ifa_scope & IFA_SITE) | |
3100 | return RT_SCOPE_SITE; | |
3101 | else | |
3102 | return RT_SCOPE_UNIVERSE; | |
3103 | } | |
3104 | ||
0ab6803b TG |
3105 | static inline int inet6_ifaddr_msgsize(void) |
3106 | { | |
339bf98f TG |
3107 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3108 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3109 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3110 | } |
c5396a31 | 3111 | |
1da177e4 | 3112 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3113 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3114 | { |
1da177e4 | 3115 | struct nlmsghdr *nlh; |
85486af0 | 3116 | u32 preferred, valid; |
1da177e4 | 3117 | |
0ab6803b TG |
3118 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3119 | if (nlh == NULL) | |
26932566 | 3120 | return -EMSGSIZE; |
0ab6803b | 3121 | |
101bb229 TG |
3122 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3123 | ifa->idev->dev->ifindex); | |
3124 | ||
1da177e4 | 3125 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3126 | preferred = ifa->prefered_lft; |
3127 | valid = ifa->valid_lft; | |
3128 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3129 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3130 | preferred -= tval; |
3131 | if (valid != INFINITY_LIFE_TIME) | |
3132 | valid -= tval; | |
1da177e4 LT |
3133 | } |
3134 | } else { | |
85486af0 TG |
3135 | preferred = INFINITY_LIFE_TIME; |
3136 | valid = INFINITY_LIFE_TIME; | |
3137 | } | |
3138 | ||
0ab6803b | 3139 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3140 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3141 | nlmsg_cancel(skb, nlh); | |
3142 | return -EMSGSIZE; | |
3143 | } | |
1da177e4 | 3144 | |
0ab6803b | 3145 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3146 | } |
3147 | ||
3148 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3149 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3150 | { |
1da177e4 | 3151 | struct nlmsghdr *nlh; |
101bb229 TG |
3152 | u8 scope = RT_SCOPE_UNIVERSE; |
3153 | int ifindex = ifmca->idev->dev->ifindex; | |
3154 | ||
3155 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3156 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3157 | |
0ab6803b TG |
3158 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3159 | if (nlh == NULL) | |
26932566 | 3160 | return -EMSGSIZE; |
85486af0 | 3161 | |
0ab6803b TG |
3162 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3163 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3164 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3165 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3166 | nlmsg_cancel(skb, nlh); | |
3167 | return -EMSGSIZE; | |
3168 | } | |
85486af0 | 3169 | |
0ab6803b | 3170 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3171 | } |
3172 | ||
3173 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3174 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3175 | { |
1da177e4 | 3176 | struct nlmsghdr *nlh; |
101bb229 TG |
3177 | u8 scope = RT_SCOPE_UNIVERSE; |
3178 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3179 | ||
3180 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3181 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3182 | |
0ab6803b TG |
3183 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3184 | if (nlh == NULL) | |
26932566 | 3185 | return -EMSGSIZE; |
85486af0 | 3186 | |
0ab6803b TG |
3187 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3188 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3189 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3190 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3191 | nlmsg_cancel(skb, nlh); | |
3192 | return -EMSGSIZE; | |
3193 | } | |
1da177e4 | 3194 | |
0ab6803b | 3195 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3196 | } |
3197 | ||
3198 | enum addr_type_t | |
3199 | { | |
3200 | UNICAST_ADDR, | |
3201 | MULTICAST_ADDR, | |
3202 | ANYCAST_ADDR, | |
3203 | }; | |
3204 | ||
3205 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3206 | enum addr_type_t type) | |
3207 | { | |
3208 | int idx, ip_idx; | |
3209 | int s_idx, s_ip_idx; | |
3210 | int err = 1; | |
3211 | struct net_device *dev; | |
3212 | struct inet6_dev *idev = NULL; | |
3213 | struct inet6_ifaddr *ifa; | |
3214 | struct ifmcaddr6 *ifmca; | |
3215 | struct ifacaddr6 *ifaca; | |
3216 | ||
3217 | s_idx = cb->args[0]; | |
3218 | s_ip_idx = ip_idx = cb->args[1]; | |
3219 | read_lock(&dev_base_lock); | |
1ab1457c | 3220 | |
1da177e4 LT |
3221 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
3222 | if (idx < s_idx) | |
3223 | continue; | |
3224 | if (idx > s_idx) | |
3225 | s_ip_idx = 0; | |
3226 | ip_idx = 0; | |
3227 | if ((idev = in6_dev_get(dev)) == NULL) | |
3228 | continue; | |
3229 | read_lock_bh(&idev->lock); | |
3230 | switch (type) { | |
3231 | case UNICAST_ADDR: | |
ae9cda5d | 3232 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3233 | for (ifa = idev->addr_list; ifa; |
3234 | ifa = ifa->if_next, ip_idx++) { | |
3235 | if (ip_idx < s_ip_idx) | |
3236 | continue; | |
1ab1457c YH |
3237 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3238 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3239 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3240 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3241 | goto done; |
3242 | } | |
1da177e4 LT |
3243 | break; |
3244 | case MULTICAST_ADDR: | |
3245 | /* multicast address */ | |
1ab1457c | 3246 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3247 | ifmca = ifmca->next, ip_idx++) { |
3248 | if (ip_idx < s_ip_idx) | |
3249 | continue; | |
1ab1457c YH |
3250 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3251 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3252 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3253 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3254 | goto done; |
3255 | } | |
3256 | break; | |
3257 | case ANYCAST_ADDR: | |
3258 | /* anycast address */ | |
3259 | for (ifaca = idev->ac_list; ifaca; | |
3260 | ifaca = ifaca->aca_next, ip_idx++) { | |
3261 | if (ip_idx < s_ip_idx) | |
3262 | continue; | |
1ab1457c YH |
3263 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3264 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3265 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3266 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3267 | goto done; |
3268 | } | |
3269 | break; | |
3270 | default: | |
3271 | break; | |
3272 | } | |
3273 | read_unlock_bh(&idev->lock); | |
3274 | in6_dev_put(idev); | |
3275 | } | |
3276 | done: | |
3277 | if (err <= 0) { | |
3278 | read_unlock_bh(&idev->lock); | |
3279 | in6_dev_put(idev); | |
3280 | } | |
3281 | read_unlock(&dev_base_lock); | |
3282 | cb->args[0] = idx; | |
3283 | cb->args[1] = ip_idx; | |
3284 | return skb->len; | |
3285 | } | |
3286 | ||
3287 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3288 | { | |
3289 | enum addr_type_t type = UNICAST_ADDR; | |
3290 | return inet6_dump_addr(skb, cb, type); | |
3291 | } | |
3292 | ||
3293 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3294 | { | |
3295 | enum addr_type_t type = MULTICAST_ADDR; | |
3296 | return inet6_dump_addr(skb, cb, type); | |
3297 | } | |
3298 | ||
3299 | ||
3300 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3301 | { | |
3302 | enum addr_type_t type = ANYCAST_ADDR; | |
3303 | return inet6_dump_addr(skb, cb, type); | |
3304 | } | |
3305 | ||
1b29fc2c TG |
3306 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3307 | void *arg) | |
6c223828 | 3308 | { |
1b29fc2c TG |
3309 | struct ifaddrmsg *ifm; |
3310 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3311 | struct in6_addr *addr = NULL; |
3312 | struct net_device *dev = NULL; | |
3313 | struct inet6_ifaddr *ifa; | |
3314 | struct sk_buff *skb; | |
6c223828 NT |
3315 | int err; |
3316 | ||
1b29fc2c TG |
3317 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3318 | if (err < 0) | |
3319 | goto errout; | |
3320 | ||
3321 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3322 | if (addr == NULL) { | |
3323 | err = -EINVAL; | |
3324 | goto errout; | |
6c223828 | 3325 | } |
6c223828 | 3326 | |
1b29fc2c | 3327 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3328 | if (ifm->ifa_index) |
3329 | dev = __dev_get_by_index(ifm->ifa_index); | |
3330 | ||
1b29fc2c TG |
3331 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3332 | err = -EADDRNOTAVAIL; | |
3333 | goto errout; | |
3334 | } | |
6c223828 | 3335 | |
0ab6803b | 3336 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3337 | err = -ENOBUFS; |
1b29fc2c | 3338 | goto errout_ifa; |
6c223828 NT |
3339 | } |
3340 | ||
6c223828 NT |
3341 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3342 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3343 | if (err < 0) { |
3344 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3345 | WARN_ON(err == -EMSGSIZE); | |
3346 | kfree_skb(skb); | |
3347 | goto errout_ifa; | |
3348 | } | |
2942e900 | 3349 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3350 | errout_ifa: |
6c223828 | 3351 | in6_ifa_put(ifa); |
1b29fc2c | 3352 | errout: |
6c223828 | 3353 | return err; |
6c223828 NT |
3354 | } |
3355 | ||
1da177e4 LT |
3356 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3357 | { | |
3358 | struct sk_buff *skb; | |
5d620266 | 3359 | int err = -ENOBUFS; |
1da177e4 | 3360 | |
0ab6803b | 3361 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3362 | if (skb == NULL) |
3363 | goto errout; | |
3364 | ||
3365 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3366 | if (err < 0) { |
3367 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3368 | WARN_ON(err == -EMSGSIZE); | |
3369 | kfree_skb(skb); | |
3370 | goto errout; | |
3371 | } | |
5d620266 TG |
3372 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3373 | errout: | |
3374 | if (err < 0) | |
3375 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3376 | } |
3377 | ||
3378 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3379 | __s32 *array, int bytes) | |
3380 | { | |
04561c1f TG |
3381 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3382 | ||
1da177e4 LT |
3383 | memset(array, 0, bytes); |
3384 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3385 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3386 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3387 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3388 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3389 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3390 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3391 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3392 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3393 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3394 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3395 | #ifdef CONFIG_IPV6_PRIVACY | |
3396 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3397 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3398 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3399 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3400 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3401 | #endif | |
3402 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3403 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3404 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3405 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3406 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3407 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3408 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3409 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3410 | #endif | |
930d6ff2 | 3411 | #endif |
fbea49e1 | 3412 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
1da177e4 LT |
3413 | } |
3414 | ||
339bf98f TG |
3415 | static inline size_t inet6_if_nlmsg_size(void) |
3416 | { | |
3417 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3418 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3419 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3420 | + nla_total_size(4) /* IFLA_MTU */ | |
3421 | + nla_total_size(4) /* IFLA_LINK */ | |
3422 | + nla_total_size( /* IFLA_PROTINFO */ | |
3423 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3424 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3425 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3426 | ); | |
3427 | } | |
c5396a31 | 3428 | |
1ab1457c | 3429 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3430 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3431 | { |
04561c1f TG |
3432 | struct net_device *dev = idev->dev; |
3433 | struct nlattr *conf; | |
3434 | struct ifinfomsg *hdr; | |
3435 | struct nlmsghdr *nlh; | |
3436 | void *protoinfo; | |
3437 | struct ifla_cacheinfo ci; | |
3438 | ||
3439 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3440 | if (nlh == NULL) | |
26932566 | 3441 | return -EMSGSIZE; |
04561c1f TG |
3442 | |
3443 | hdr = nlmsg_data(nlh); | |
3444 | hdr->ifi_family = AF_INET6; | |
3445 | hdr->__ifi_pad = 0; | |
3446 | hdr->ifi_type = dev->type; | |
3447 | hdr->ifi_index = dev->ifindex; | |
3448 | hdr->ifi_flags = dev_get_flags(dev); | |
3449 | hdr->ifi_change = 0; | |
3450 | ||
3451 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3452 | |
3453 | if (dev->addr_len) | |
04561c1f | 3454 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3455 | |
04561c1f | 3456 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3457 | if (dev->ifindex != dev->iflink) |
04561c1f | 3458 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3459 | |
04561c1f TG |
3460 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3461 | if (protoinfo == NULL) | |
3462 | goto nla_put_failure; | |
1da177e4 | 3463 | |
04561c1f | 3464 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3465 | |
1da177e4 LT |
3466 | ci.max_reasm_len = IPV6_MAXPLEN; |
3467 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3468 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3469 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3470 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3471 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3472 | ||
3473 | conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); | |
3474 | if (conf == NULL) | |
3475 | goto nla_put_failure; | |
3476 | ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf)); | |
1da177e4 LT |
3477 | |
3478 | /* XXX - Statistics/MC not implemented */ | |
1da177e4 | 3479 | |
04561c1f TG |
3480 | nla_nest_end(skb, protoinfo); |
3481 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3482 | |
04561c1f | 3483 | nla_put_failure: |
26932566 PM |
3484 | nlmsg_cancel(skb, nlh); |
3485 | return -EMSGSIZE; | |
1da177e4 LT |
3486 | } |
3487 | ||
3488 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3489 | { | |
3490 | int idx, err; | |
3491 | int s_idx = cb->args[0]; | |
3492 | struct net_device *dev; | |
3493 | struct inet6_dev *idev; | |
3494 | ||
3495 | read_lock(&dev_base_lock); | |
3496 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3497 | if (idx < s_idx) | |
3498 | continue; | |
3499 | if ((idev = in6_dev_get(dev)) == NULL) | |
3500 | continue; | |
1ab1457c | 3501 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3502 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3503 | in6_dev_put(idev); |
3504 | if (err <= 0) | |
3505 | break; | |
3506 | } | |
3507 | read_unlock(&dev_base_lock); | |
3508 | cb->args[0] = idx; | |
3509 | ||
3510 | return skb->len; | |
3511 | } | |
3512 | ||
3513 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3514 | { | |
3515 | struct sk_buff *skb; | |
8d7a76c9 | 3516 | int err = -ENOBUFS; |
1ab1457c | 3517 | |
339bf98f | 3518 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3519 | if (skb == NULL) |
3520 | goto errout; | |
3521 | ||
3522 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3523 | if (err < 0) { |
3524 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3525 | WARN_ON(err == -EMSGSIZE); | |
3526 | kfree_skb(skb); | |
3527 | goto errout; | |
3528 | } | |
8d7a76c9 TG |
3529 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3530 | errout: | |
3531 | if (err < 0) | |
3532 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3533 | } |
3534 | ||
339bf98f TG |
3535 | static inline size_t inet6_prefix_nlmsg_size(void) |
3536 | { | |
3537 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3538 | + nla_total_size(sizeof(struct in6_addr)) | |
3539 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3540 | } | |
c5396a31 | 3541 | |
1da177e4 | 3542 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3543 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3544 | int event, unsigned int flags) | |
1da177e4 | 3545 | { |
6051e2f4 TG |
3546 | struct prefixmsg *pmsg; |
3547 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3548 | struct prefix_cacheinfo ci; |
3549 | ||
6051e2f4 TG |
3550 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3551 | if (nlh == NULL) | |
26932566 | 3552 | return -EMSGSIZE; |
6051e2f4 TG |
3553 | |
3554 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3555 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3556 | pmsg->prefix_pad1 = 0; |
3557 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3558 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3559 | pmsg->prefix_len = pinfo->prefix_len; | |
3560 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3561 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3562 | pmsg->prefix_flags = 0; |
3563 | if (pinfo->onlink) | |
3564 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3565 | if (pinfo->autoconf) | |
3566 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3567 | ||
6051e2f4 | 3568 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3569 | |
3570 | ci.preferred_time = ntohl(pinfo->prefered); | |
3571 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3572 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3573 | |
6051e2f4 | 3574 | return nlmsg_end(skb, nlh); |
1da177e4 | 3575 | |
6051e2f4 | 3576 | nla_put_failure: |
26932566 PM |
3577 | nlmsg_cancel(skb, nlh); |
3578 | return -EMSGSIZE; | |
1da177e4 LT |
3579 | } |
3580 | ||
1ab1457c | 3581 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3582 | struct prefix_info *pinfo) |
3583 | { | |
3584 | struct sk_buff *skb; | |
8c384bfa | 3585 | int err = -ENOBUFS; |
1da177e4 | 3586 | |
339bf98f | 3587 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3588 | if (skb == NULL) |
3589 | goto errout; | |
3590 | ||
3591 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3592 | if (err < 0) { |
3593 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3594 | WARN_ON(err == -EMSGSIZE); | |
3595 | kfree_skb(skb); | |
3596 | goto errout; | |
3597 | } | |
8c384bfa TG |
3598 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3599 | errout: | |
3600 | if (err < 0) | |
3601 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3602 | } |
3603 | ||
db46edc6 | 3604 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3605 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3606 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3607 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
6c223828 NT |
3608 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, |
3609 | .dumpit = inet6_dump_ifaddr, }, | |
1da177e4 LT |
3610 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
3611 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3612 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3613 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3614 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3615 | .dumpit = inet6_dump_fib, }, | |
8423a9aa | 3616 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
101367c2 | 3617 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, |
8423a9aa | 3618 | #endif |
1da177e4 LT |
3619 | }; |
3620 | ||
3621 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3622 | { | |
3623 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3624 | ||
3625 | switch (event) { | |
3626 | case RTM_NEWADDR: | |
40e22e8f | 3627 | ip6_ins_rt(ifp->rt); |
1da177e4 LT |
3628 | if (ifp->idev->cnf.forwarding) |
3629 | addrconf_join_anycast(ifp); | |
3630 | break; | |
3631 | case RTM_DELADDR: | |
3632 | if (ifp->idev->cnf.forwarding) | |
3633 | addrconf_leave_anycast(ifp); | |
3634 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3635 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3636 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3637 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3638 | break; |
3639 | } | |
3640 | } | |
3641 | ||
3642 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3643 | { | |
8814c4b5 | 3644 | rcu_read_lock_bh(); |
1da177e4 LT |
3645 | if (likely(ifp->idev->dead == 0)) |
3646 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3647 | rcu_read_unlock_bh(); |
1da177e4 LT |
3648 | } |
3649 | ||
3650 | #ifdef CONFIG_SYSCTL | |
3651 | ||
3652 | static | |
3653 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3654 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3655 | { | |
3656 | int *valp = ctl->data; | |
3657 | int val = *valp; | |
3658 | int ret; | |
3659 | ||
3660 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3661 | ||
3662 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3663 | if (valp != &ipv6_devconf.forwarding) { | |
3664 | if ((!*valp) ^ (!val)) { | |
3665 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3666 | if (idev == NULL) | |
3667 | return ret; | |
3668 | dev_forward_change(idev); | |
3669 | } | |
3670 | } else { | |
3671 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3672 | addrconf_forward_change(); | |
3673 | } | |
3674 | if (*valp) | |
3675 | rt6_purge_dflt_routers(); | |
3676 | } | |
3677 | ||
1ab1457c | 3678 | return ret; |
1da177e4 LT |
3679 | } |
3680 | ||
1ab1457c | 3681 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3682 | int __user *name, int nlen, |
3683 | void __user *oldval, | |
3684 | size_t __user *oldlenp, | |
1f29bcd7 | 3685 | void __user *newval, size_t newlen) |
1da177e4 LT |
3686 | { |
3687 | int *valp = table->data; | |
3688 | int new; | |
3689 | ||
3690 | if (!newval || !newlen) | |
3691 | return 0; | |
3692 | if (newlen != sizeof(int)) | |
3693 | return -EINVAL; | |
3694 | if (get_user(new, (int __user *)newval)) | |
3695 | return -EFAULT; | |
3696 | if (new == *valp) | |
3697 | return 0; | |
3698 | if (oldval && oldlenp) { | |
3699 | size_t len; | |
3700 | if (get_user(len, oldlenp)) | |
3701 | return -EFAULT; | |
3702 | if (len) { | |
3703 | if (len > table->maxlen) | |
3704 | len = table->maxlen; | |
3705 | if (copy_to_user(oldval, valp, len)) | |
3706 | return -EFAULT; | |
3707 | if (put_user(len, oldlenp)) | |
3708 | return -EFAULT; | |
3709 | } | |
3710 | } | |
3711 | ||
3712 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3713 | if (valp != &ipv6_devconf.forwarding) { | |
3714 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3715 | int changed; | |
3716 | if (unlikely(idev == NULL)) | |
3717 | return -ENODEV; | |
3718 | changed = (!*valp) ^ (!new); | |
3719 | *valp = new; | |
3720 | if (changed) | |
3721 | dev_forward_change(idev); | |
3722 | } else { | |
3723 | *valp = new; | |
3724 | addrconf_forward_change(); | |
3725 | } | |
3726 | ||
3727 | if (*valp) | |
3728 | rt6_purge_dflt_routers(); | |
3729 | } else | |
3730 | *valp = new; | |
3731 | ||
3732 | return 1; | |
3733 | } | |
3734 | ||
3735 | static struct addrconf_sysctl_table | |
3736 | { | |
3737 | struct ctl_table_header *sysctl_header; | |
3738 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3739 | ctl_table addrconf_dev[2]; | |
3740 | ctl_table addrconf_conf_dir[2]; | |
3741 | ctl_table addrconf_proto_dir[2]; | |
3742 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3743 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3744 | .sysctl_header = NULL, |
3745 | .addrconf_vars = { | |
1ab1457c | 3746 | { |
1da177e4 LT |
3747 | .ctl_name = NET_IPV6_FORWARDING, |
3748 | .procname = "forwarding", | |
1ab1457c | 3749 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3750 | .maxlen = sizeof(int), |
3751 | .mode = 0644, | |
1ab1457c | 3752 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3753 | .strategy = &addrconf_sysctl_forward_strategy, |
3754 | }, | |
3755 | { | |
3756 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3757 | .procname = "hop_limit", | |
1ab1457c | 3758 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3759 | .maxlen = sizeof(int), |
3760 | .mode = 0644, | |
3761 | .proc_handler = proc_dointvec, | |
3762 | }, | |
3763 | { | |
3764 | .ctl_name = NET_IPV6_MTU, | |
3765 | .procname = "mtu", | |
3766 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3767 | .maxlen = sizeof(int), |
1da177e4 | 3768 | .mode = 0644, |
1ab1457c | 3769 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3770 | }, |
3771 | { | |
3772 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3773 | .procname = "accept_ra", | |
1ab1457c | 3774 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
3775 | .maxlen = sizeof(int), |
3776 | .mode = 0644, | |
1ab1457c | 3777 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3778 | }, |
3779 | { | |
3780 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3781 | .procname = "accept_redirects", | |
1ab1457c | 3782 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
3783 | .maxlen = sizeof(int), |
3784 | .mode = 0644, | |
1ab1457c | 3785 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3786 | }, |
3787 | { | |
3788 | .ctl_name = NET_IPV6_AUTOCONF, | |
3789 | .procname = "autoconf", | |
1ab1457c | 3790 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
3791 | .maxlen = sizeof(int), |
3792 | .mode = 0644, | |
1ab1457c | 3793 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3794 | }, |
3795 | { | |
3796 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3797 | .procname = "dad_transmits", | |
1ab1457c | 3798 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
3799 | .maxlen = sizeof(int), |
3800 | .mode = 0644, | |
1ab1457c | 3801 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3802 | }, |
3803 | { | |
3804 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3805 | .procname = "router_solicitations", | |
1ab1457c | 3806 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
3807 | .maxlen = sizeof(int), |
3808 | .mode = 0644, | |
1ab1457c | 3809 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3810 | }, |
3811 | { | |
3812 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3813 | .procname = "router_solicitation_interval", | |
1ab1457c | 3814 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
3815 | .maxlen = sizeof(int), |
3816 | .mode = 0644, | |
1ab1457c | 3817 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3818 | .strategy = &sysctl_jiffies, |
3819 | }, | |
3820 | { | |
3821 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3822 | .procname = "router_solicitation_delay", | |
1ab1457c | 3823 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
3824 | .maxlen = sizeof(int), |
3825 | .mode = 0644, | |
1ab1457c | 3826 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
3827 | .strategy = &sysctl_jiffies, |
3828 | }, | |
3829 | { | |
3830 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3831 | .procname = "force_mld_version", | |
1ab1457c | 3832 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
3833 | .maxlen = sizeof(int), |
3834 | .mode = 0644, | |
1ab1457c | 3835 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3836 | }, |
3837 | #ifdef CONFIG_IPV6_PRIVACY | |
3838 | { | |
3839 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3840 | .procname = "use_tempaddr", | |
1ab1457c | 3841 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
3842 | .maxlen = sizeof(int), |
3843 | .mode = 0644, | |
1ab1457c | 3844 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3845 | }, |
3846 | { | |
3847 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3848 | .procname = "temp_valid_lft", | |
1ab1457c | 3849 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
3850 | .maxlen = sizeof(int), |
3851 | .mode = 0644, | |
1ab1457c | 3852 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3853 | }, |
3854 | { | |
3855 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3856 | .procname = "temp_prefered_lft", | |
1ab1457c | 3857 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
3858 | .maxlen = sizeof(int), |
3859 | .mode = 0644, | |
1ab1457c | 3860 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3861 | }, |
3862 | { | |
3863 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3864 | .procname = "regen_max_retry", | |
1ab1457c | 3865 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
3866 | .maxlen = sizeof(int), |
3867 | .mode = 0644, | |
1ab1457c | 3868 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3869 | }, |
3870 | { | |
3871 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3872 | .procname = "max_desync_factor", | |
1ab1457c | 3873 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
3874 | .maxlen = sizeof(int), |
3875 | .mode = 0644, | |
1ab1457c | 3876 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
3877 | }, |
3878 | #endif | |
3879 | { | |
3880 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3881 | .procname = "max_addresses", | |
3882 | .data = &ipv6_devconf.max_addresses, | |
3883 | .maxlen = sizeof(int), | |
3884 | .mode = 0644, | |
3885 | .proc_handler = &proc_dointvec, | |
3886 | }, | |
65f5c7c1 YH |
3887 | { |
3888 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3889 | .procname = "accept_ra_defrtr", | |
1ab1457c | 3890 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
3891 | .maxlen = sizeof(int), |
3892 | .mode = 0644, | |
1ab1457c | 3893 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 3894 | }, |
c4fd30eb YH |
3895 | { |
3896 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3897 | .procname = "accept_ra_pinfo", | |
1ab1457c | 3898 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
3899 | .maxlen = sizeof(int), |
3900 | .mode = 0644, | |
1ab1457c | 3901 | .proc_handler = &proc_dointvec, |
c4fd30eb | 3902 | }, |
930d6ff2 YH |
3903 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3904 | { | |
3905 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3906 | .procname = "accept_ra_rtr_pref", | |
3907 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3908 | .maxlen = sizeof(int), | |
3909 | .mode = 0644, | |
3910 | .proc_handler = &proc_dointvec, | |
3911 | }, | |
52e16356 YH |
3912 | { |
3913 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3914 | .procname = "router_probe_interval", | |
3915 | .data = &ipv6_devconf.rtr_probe_interval, | |
3916 | .maxlen = sizeof(int), | |
3917 | .mode = 0644, | |
3918 | .proc_handler = &proc_dointvec_jiffies, | |
3919 | .strategy = &sysctl_jiffies, | |
3920 | }, | |
fa03ef38 | 3921 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3922 | { |
3923 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3924 | .procname = "accept_ra_rt_info_max_plen", | |
3925 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3926 | .maxlen = sizeof(int), | |
3927 | .mode = 0644, | |
3928 | .proc_handler = &proc_dointvec, | |
3929 | }, | |
3930 | #endif | |
930d6ff2 | 3931 | #endif |
fbea49e1 YH |
3932 | { |
3933 | .ctl_name = NET_IPV6_PROXY_NDP, | |
3934 | .procname = "proxy_ndp", | |
3935 | .data = &ipv6_devconf.proxy_ndp, | |
3936 | .maxlen = sizeof(int), | |
3937 | .mode = 0644, | |
3938 | .proc_handler = &proc_dointvec, | |
3939 | }, | |
1da177e4 LT |
3940 | { |
3941 | .ctl_name = 0, /* sentinel */ | |
3942 | } | |
3943 | }, | |
3944 | .addrconf_dev = { | |
3945 | { | |
3946 | .ctl_name = NET_PROTO_CONF_ALL, | |
3947 | .procname = "all", | |
3948 | .mode = 0555, | |
3949 | .child = addrconf_sysctl.addrconf_vars, | |
3950 | }, | |
3951 | { | |
3952 | .ctl_name = 0, /* sentinel */ | |
3953 | } | |
3954 | }, | |
3955 | .addrconf_conf_dir = { | |
3956 | { | |
3957 | .ctl_name = NET_IPV6_CONF, | |
3958 | .procname = "conf", | |
3959 | .mode = 0555, | |
3960 | .child = addrconf_sysctl.addrconf_dev, | |
3961 | }, | |
3962 | { | |
3963 | .ctl_name = 0, /* sentinel */ | |
3964 | } | |
3965 | }, | |
3966 | .addrconf_proto_dir = { | |
3967 | { | |
3968 | .ctl_name = NET_IPV6, | |
3969 | .procname = "ipv6", | |
3970 | .mode = 0555, | |
3971 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3972 | }, | |
3973 | { | |
3974 | .ctl_name = 0, /* sentinel */ | |
3975 | } | |
3976 | }, | |
3977 | .addrconf_root_dir = { | |
3978 | { | |
3979 | .ctl_name = CTL_NET, | |
3980 | .procname = "net", | |
3981 | .mode = 0555, | |
3982 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3983 | }, | |
3984 | { | |
3985 | .ctl_name = 0, /* sentinel */ | |
3986 | } | |
3987 | }, | |
3988 | }; | |
3989 | ||
3990 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3991 | { | |
3992 | int i; | |
3993 | struct net_device *dev = idev ? idev->dev : NULL; | |
3994 | struct addrconf_sysctl_table *t; | |
3995 | char *dev_name = NULL; | |
3996 | ||
af879cc7 | 3997 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
3998 | if (t == NULL) |
3999 | return; | |
1da177e4 LT |
4000 | for (i=0; t->addrconf_vars[i].data; i++) { |
4001 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
4002 | t->addrconf_vars[i].de = NULL; | |
4003 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
4004 | } | |
4005 | if (dev) { | |
1ab1457c | 4006 | dev_name = dev->name; |
1da177e4 LT |
4007 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
4008 | } else { | |
4009 | dev_name = "default"; | |
4010 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
4011 | } | |
4012 | ||
1ab1457c YH |
4013 | /* |
4014 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4015 | * by sysctl and we wouldn't want anyone to change it under our feet |
4016 | * (see SIOCSIFNAME). | |
1ab1457c | 4017 | */ |
543537bd | 4018 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
4019 | if (!dev_name) |
4020 | goto free; | |
4021 | ||
4022 | t->addrconf_dev[0].procname = dev_name; | |
4023 | ||
4024 | t->addrconf_dev[0].child = t->addrconf_vars; | |
4025 | t->addrconf_dev[0].de = NULL; | |
4026 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
4027 | t->addrconf_conf_dir[0].de = NULL; | |
4028 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
4029 | t->addrconf_proto_dir[0].de = NULL; | |
4030 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
4031 | t->addrconf_root_dir[0].de = NULL; | |
4032 | ||
4033 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
4034 | if (t->sysctl_header == NULL) | |
4035 | goto free_procname; | |
4036 | else | |
4037 | p->sysctl = t; | |
4038 | return; | |
4039 | ||
4040 | /* error path */ | |
4041 | free_procname: | |
4042 | kfree(dev_name); | |
4043 | free: | |
4044 | kfree(t); | |
4045 | ||
4046 | return; | |
4047 | } | |
4048 | ||
4049 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
4050 | { | |
4051 | if (p->sysctl) { | |
4052 | struct addrconf_sysctl_table *t = p->sysctl; | |
4053 | p->sysctl = NULL; | |
4054 | unregister_sysctl_table(t->sysctl_header); | |
4055 | kfree(t->addrconf_dev[0].procname); | |
4056 | kfree(t); | |
4057 | } | |
4058 | } | |
4059 | ||
4060 | ||
4061 | #endif | |
4062 | ||
4063 | /* | |
4064 | * Device notifier | |
4065 | */ | |
4066 | ||
4067 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4068 | { | |
1ab1457c | 4069 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4070 | } |
4071 | ||
4072 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
4073 | { | |
1ab1457c | 4074 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4075 | } |
4076 | ||
4077 | /* | |
4078 | * Init / cleanup code | |
4079 | */ | |
4080 | ||
4081 | int __init addrconf_init(void) | |
4082 | { | |
4083 | int err = 0; | |
4084 | ||
4085 | /* The addrconf netdev notifier requires that loopback_dev | |
4086 | * has it's ipv6 private information allocated and setup | |
4087 | * before it can bring up and give link-local addresses | |
4088 | * to other devices which are up. | |
4089 | * | |
4090 | * Unfortunately, loopback_dev is not necessarily the first | |
4091 | * entry in the global dev_base list of net devices. In fact, | |
4092 | * it is likely to be the very last entry on that list. | |
4093 | * So this causes the notifier registry below to try and | |
4094 | * give link-local addresses to all devices besides loopback_dev | |
4095 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4096 | * devices to fail to get a link-local address. | |
4097 | * | |
4098 | * So, as a temporary fix, allocate the ipv6 structure for | |
4099 | * loopback_dev first by hand. | |
4100 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4101 | * device and it being up should be removed. | |
4102 | */ | |
4103 | rtnl_lock(); | |
4104 | if (!ipv6_add_dev(&loopback_dev)) | |
4105 | err = -ENOMEM; | |
4106 | rtnl_unlock(); | |
4107 | if (err) | |
4108 | return err; | |
4109 | ||
c62dba90 HX |
4110 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4111 | ||
1da177e4 LT |
4112 | register_netdevice_notifier(&ipv6_dev_notf); |
4113 | ||
1da177e4 LT |
4114 | addrconf_verify(0); |
4115 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4116 | #ifdef CONFIG_SYSCTL | |
4117 | addrconf_sysctl.sysctl_header = | |
4118 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
4119 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
4120 | #endif | |
4121 | ||
4122 | return 0; | |
4123 | } | |
4124 | ||
4125 | void __exit addrconf_cleanup(void) | |
4126 | { | |
1ab1457c YH |
4127 | struct net_device *dev; |
4128 | struct inet6_dev *idev; | |
4129 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
4130 | int i; |
4131 | ||
4132 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4133 | ||
4134 | rtnetlink_links[PF_INET6] = NULL; | |
4135 | #ifdef CONFIG_SYSCTL | |
4136 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4137 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4138 | #endif | |
4139 | ||
4140 | rtnl_lock(); | |
4141 | ||
4142 | /* | |
4143 | * clean dev list. | |
4144 | */ | |
4145 | ||
4146 | for (dev=dev_base; dev; dev=dev->next) { | |
4147 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4148 | continue; | |
4149 | addrconf_ifdown(dev, 1); | |
4150 | } | |
4151 | addrconf_ifdown(&loopback_dev, 2); | |
4152 | ||
4153 | /* | |
4154 | * Check hash table. | |
4155 | */ | |
4156 | ||
4157 | write_lock_bh(&addrconf_hash_lock); | |
4158 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4159 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4160 | struct inet6_ifaddr *bifa; | |
4161 | ||
4162 | bifa = ifa; | |
4163 | ifa = ifa->lst_next; | |
4164 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4165 | /* Do not free it; something is wrong. | |
4166 | Now we can investigate it with debugger. | |
4167 | */ | |
4168 | } | |
4169 | } | |
4170 | write_unlock_bh(&addrconf_hash_lock); | |
4171 | ||
4172 | del_timer(&addr_chk_timer); | |
4173 | ||
4174 | rtnl_unlock(); | |
4175 | ||
1da177e4 LT |
4176 | #ifdef CONFIG_PROC_FS |
4177 | proc_net_remove("if_inet6"); | |
4178 | #endif | |
4179 | } |