Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
1da177e4 LT |
47 | #include <linux/net.h> |
48 | #include <linux/in6.h> | |
49 | #include <linux/netdevice.h> | |
1823730f | 50 | #include <linux/if_addr.h> |
1da177e4 LT |
51 | #include <linux/if_arp.h> |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 LT |
64 | |
65 | #include <net/sock.h> | |
66 | #include <net/snmp.h> | |
67 | ||
68 | #include <net/ipv6.h> | |
69 | #include <net/protocol.h> | |
70 | #include <net/ndisc.h> | |
71 | #include <net/ip6_route.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/tcp.h> | |
74 | #include <net/ip.h> | |
5d620266 | 75 | #include <net/netlink.h> |
1da177e4 LT |
76 | #include <linux/if_tunnel.h> |
77 | #include <linux/rtnetlink.h> | |
78 | ||
79 | #ifdef CONFIG_IPV6_PRIVACY | |
80 | #include <linux/random.h> | |
1da177e4 LT |
81 | #endif |
82 | ||
83 | #include <asm/uaccess.h> | |
84 | ||
85 | #include <linux/proc_fs.h> | |
86 | #include <linux/seq_file.h> | |
87 | ||
88 | /* Set to 3 to get tracing... */ | |
89 | #define ACONF_DEBUG 2 | |
90 | ||
91 | #if ACONF_DEBUG >= 3 | |
92 | #define ADBG(x) printk x | |
93 | #else | |
94 | #define ADBG(x) | |
95 | #endif | |
96 | ||
97 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
98 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
99 | ||
100 | #ifdef CONFIG_SYSCTL | |
101 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
102 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
103 | #endif | |
104 | ||
105 | #ifdef CONFIG_IPV6_PRIVACY | |
106 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 107 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
108 | static void ipv6_regen_rndid(unsigned long data); |
109 | ||
110 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
111 | #endif |
112 | ||
113 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
114 | ||
115 | /* | |
116 | * Configured unicast address hash table | |
117 | */ | |
118 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
119 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
120 | ||
1da177e4 LT |
121 | static void addrconf_verify(unsigned long); |
122 | ||
8d06afab | 123 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
124 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
125 | ||
126 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
127 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
128 | ||
129 | static int addrconf_ifdown(struct net_device *dev, int how); | |
130 | ||
e431b8c0 | 131 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
132 | static void addrconf_dad_timer(unsigned long data); |
133 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 134 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
135 | static void addrconf_rs_timer(unsigned long data); |
136 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
137 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
138 | ||
1ab1457c | 139 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
140 | struct prefix_info *pinfo); |
141 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
142 | ||
e041c683 | 143 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 144 | |
ab32ea5d | 145 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
146 | .forwarding = 0, |
147 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
148 | .mtu6 = IPV6_MIN_MTU, | |
149 | .accept_ra = 1, | |
150 | .accept_redirects = 1, | |
151 | .autoconf = 1, | |
152 | .force_mld_version = 0, | |
153 | .dad_transmits = 1, | |
154 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
155 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
156 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
157 | #ifdef CONFIG_IPV6_PRIVACY | |
158 | .use_tempaddr = 0, | |
159 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
160 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
161 | .regen_max_retry = REGEN_MAX_RETRY, | |
162 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
163 | #endif | |
164 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 165 | .accept_ra_defrtr = 1, |
c4fd30eb | 166 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
167 | #ifdef CONFIG_IPV6_ROUTER_PREF |
168 | .accept_ra_rtr_pref = 1, | |
52e16356 | 169 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
170 | #ifdef CONFIG_IPV6_ROUTE_INFO |
171 | .accept_ra_rt_info_max_plen = 0, | |
172 | #endif | |
930d6ff2 | 173 | #endif |
fbea49e1 | 174 | .proxy_ndp = 0, |
0bcbc926 | 175 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
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, |
0bcbc926 | 207 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
208 | }; |
209 | ||
210 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
211 | #if 0 | |
212 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
213 | #endif | |
214 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
215 | ||
1da177e4 LT |
216 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
217 | { | |
218 | if (del_timer(&ifp->timer)) | |
219 | __in6_ifa_put(ifp); | |
220 | } | |
221 | ||
222 | enum addrconf_timer_t | |
223 | { | |
224 | AC_NONE, | |
225 | AC_DAD, | |
226 | AC_RS, | |
227 | }; | |
228 | ||
229 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
230 | enum addrconf_timer_t what, | |
231 | unsigned long when) | |
232 | { | |
233 | if (!del_timer(&ifp->timer)) | |
234 | in6_ifa_hold(ifp); | |
235 | ||
236 | switch (what) { | |
237 | case AC_DAD: | |
238 | ifp->timer.function = addrconf_dad_timer; | |
239 | break; | |
240 | case AC_RS: | |
241 | ifp->timer.function = addrconf_rs_timer; | |
242 | break; | |
243 | default:; | |
244 | } | |
245 | ifp->timer.expires = jiffies + when; | |
246 | add_timer(&ifp->timer); | |
247 | } | |
248 | ||
249 | /* Nobody refers to this device, we may destroy it. */ | |
250 | ||
8814c4b5 YH |
251 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
252 | { | |
253 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
254 | kfree(idev); | |
255 | } | |
256 | ||
1da177e4 LT |
257 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
258 | { | |
259 | struct net_device *dev = idev->dev; | |
260 | BUG_TRAP(idev->addr_list==NULL); | |
261 | BUG_TRAP(idev->mc_list==NULL); | |
262 | #ifdef NET_REFCNT_DEBUG | |
263 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
264 | #endif | |
265 | dev_put(dev); | |
266 | if (!idev->dead) { | |
267 | printk("Freeing alive inet6 device %p\n", idev); | |
268 | return; | |
269 | } | |
270 | snmp6_free_dev(idev); | |
8814c4b5 | 271 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
272 | } |
273 | ||
7159039a YH |
274 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
275 | ||
1da177e4 LT |
276 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
277 | { | |
278 | struct inet6_dev *ndev; | |
d88ae4cc | 279 | struct in6_addr maddr; |
1da177e4 LT |
280 | |
281 | ASSERT_RTNL(); | |
282 | ||
283 | if (dev->mtu < IPV6_MIN_MTU) | |
284 | return NULL; | |
285 | ||
1ab1457c | 286 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 287 | |
1ab1457c YH |
288 | if (ndev == NULL) |
289 | return NULL; | |
322f74a4 IO |
290 | |
291 | rwlock_init(&ndev->lock); | |
292 | ndev->dev = dev; | |
293 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
294 | ndev->cnf.mtu6 = dev->mtu; | |
295 | ndev->cnf.sysctl = NULL; | |
296 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
297 | if (ndev->nd_parms == NULL) { | |
298 | kfree(ndev); | |
299 | return NULL; | |
300 | } | |
301 | /* We refer to the device */ | |
302 | dev_hold(dev); | |
1da177e4 | 303 | |
322f74a4 IO |
304 | if (snmp6_alloc_dev(ndev) < 0) { |
305 | ADBG((KERN_WARNING | |
306 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
307 | __FUNCTION__, dev->name)); | |
308 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
309 | ndev->dead = 1; | |
310 | in6_dev_finish_destroy(ndev); | |
311 | return NULL; | |
312 | } | |
1da177e4 | 313 | |
322f74a4 IO |
314 | if (snmp6_register_dev(ndev) < 0) { |
315 | ADBG((KERN_WARNING | |
316 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
317 | __FUNCTION__, dev->name)); | |
318 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
319 | ndev->dead = 1; | |
320 | in6_dev_finish_destroy(ndev); | |
321 | return NULL; | |
322 | } | |
323 | ||
324 | /* One reference from device. We must do this before | |
325 | * we invoke __ipv6_regen_rndid(). | |
326 | */ | |
327 | in6_dev_hold(ndev); | |
1da177e4 LT |
328 | |
329 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
330 | init_timer(&ndev->regen_timer); |
331 | ndev->regen_timer.function = ipv6_regen_rndid; | |
332 | ndev->regen_timer.data = (unsigned long) ndev; | |
333 | if ((dev->flags&IFF_LOOPBACK) || | |
334 | dev->type == ARPHRD_TUNNEL || | |
0be669bb JR |
335 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
336 | dev->type == ARPHRD_SIT || | |
337 | #endif | |
338 | dev->type == ARPHRD_NONE) { | |
322f74a4 IO |
339 | printk(KERN_INFO |
340 | "%s: Disabled Privacy Extensions\n", | |
341 | dev->name); | |
342 | ndev->cnf.use_tempaddr = -1; | |
343 | } else { | |
344 | in6_dev_hold(ndev); | |
345 | ipv6_regen_rndid((unsigned long) ndev); | |
346 | } | |
1da177e4 LT |
347 | #endif |
348 | ||
53aadcc9 HX |
349 | if (netif_running(dev) && netif_carrier_ok(dev)) |
350 | ndev->if_flags |= IF_READY; | |
351 | ||
322f74a4 IO |
352 | ipv6_mc_init_dev(ndev); |
353 | ndev->tstamp = jiffies; | |
1da177e4 | 354 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
355 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
356 | NET_IPV6_NEIGH, "ipv6", | |
357 | &ndisc_ifinfo_sysctl_change, | |
358 | NULL); | |
359 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 360 | #endif |
30c4cf57 DS |
361 | /* protected by rtnl_lock */ |
362 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
363 | |
364 | /* Join all-node multicast group */ | |
365 | ipv6_addr_all_nodes(&maddr); | |
366 | ipv6_dev_mc_inc(dev, &maddr); | |
367 | ||
1da177e4 LT |
368 | return ndev; |
369 | } | |
370 | ||
371 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
372 | { | |
373 | struct inet6_dev *idev; | |
374 | ||
375 | ASSERT_RTNL(); | |
376 | ||
377 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
378 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
379 | return NULL; | |
380 | } | |
c5e33bdd | 381 | |
1da177e4 LT |
382 | if (dev->flags&IFF_UP) |
383 | ipv6_mc_up(idev); | |
384 | return idev; | |
385 | } | |
386 | ||
387 | #ifdef CONFIG_SYSCTL | |
388 | static void dev_forward_change(struct inet6_dev *idev) | |
389 | { | |
390 | struct net_device *dev; | |
391 | struct inet6_ifaddr *ifa; | |
392 | struct in6_addr addr; | |
393 | ||
394 | if (!idev) | |
395 | return; | |
396 | dev = idev->dev; | |
397 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
398 | ipv6_addr_all_routers(&addr); | |
1ab1457c | 399 | |
1da177e4 LT |
400 | if (idev->cnf.forwarding) |
401 | ipv6_dev_mc_inc(dev, &addr); | |
402 | else | |
403 | ipv6_dev_mc_dec(dev, &addr); | |
404 | } | |
405 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
406 | if (ifa->flags&IFA_F_TENTATIVE) |
407 | continue; | |
1da177e4 LT |
408 | if (idev->cnf.forwarding) |
409 | addrconf_join_anycast(ifa); | |
410 | else | |
411 | addrconf_leave_anycast(ifa); | |
412 | } | |
413 | } | |
414 | ||
415 | ||
416 | static void addrconf_forward_change(void) | |
417 | { | |
418 | struct net_device *dev; | |
419 | struct inet6_dev *idev; | |
420 | ||
421 | read_lock(&dev_base_lock); | |
422 | for (dev=dev_base; dev; dev=dev->next) { | |
8814c4b5 | 423 | rcu_read_lock(); |
1da177e4 LT |
424 | idev = __in6_dev_get(dev); |
425 | if (idev) { | |
426 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
427 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
428 | if (changed) | |
429 | dev_forward_change(idev); | |
430 | } | |
8814c4b5 | 431 | rcu_read_unlock(); |
1da177e4 LT |
432 | } |
433 | read_unlock(&dev_base_lock); | |
434 | } | |
435 | #endif | |
436 | ||
437 | /* Nobody refers to this ifaddr, destroy it */ | |
438 | ||
439 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
440 | { | |
441 | BUG_TRAP(ifp->if_next==NULL); | |
442 | BUG_TRAP(ifp->lst_next==NULL); | |
443 | #ifdef NET_REFCNT_DEBUG | |
444 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
445 | #endif | |
446 | ||
447 | in6_dev_put(ifp->idev); | |
448 | ||
449 | if (del_timer(&ifp->timer)) | |
450 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
451 | ||
452 | if (!ifp->dead) { | |
453 | printk("Freeing alive inet6 address %p\n", ifp); | |
454 | return; | |
455 | } | |
456 | dst_release(&ifp->rt->u.dst); | |
457 | ||
458 | kfree(ifp); | |
459 | } | |
460 | ||
e55ffac6 BH |
461 | static void |
462 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
463 | { | |
464 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 465 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
466 | |
467 | /* | |
468 | * Each device address list is sorted in order of scope - | |
469 | * global before linklocal. | |
470 | */ | |
471 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
472 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 473 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
474 | break; |
475 | } | |
476 | ||
477 | ifp->if_next = *ifap; | |
478 | *ifap = ifp; | |
479 | } | |
480 | ||
1da177e4 LT |
481 | /* On success it returns ifp with increased reference count */ |
482 | ||
483 | static struct inet6_ifaddr * | |
484 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 485 | int scope, u32 flags) |
1da177e4 LT |
486 | { |
487 | struct inet6_ifaddr *ifa = NULL; | |
488 | struct rt6_info *rt; | |
489 | int hash; | |
490 | int err = 0; | |
491 | ||
8814c4b5 | 492 | rcu_read_lock_bh(); |
1da177e4 LT |
493 | if (idev->dead) { |
494 | err = -ENODEV; /*XXX*/ | |
495 | goto out2; | |
496 | } | |
497 | ||
498 | write_lock(&addrconf_hash_lock); | |
499 | ||
500 | /* Ignore adding duplicate addresses on an interface */ | |
501 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
502 | ADBG(("ipv6_add_addr: already assigned\n")); | |
503 | err = -EEXIST; | |
504 | goto out; | |
505 | } | |
506 | ||
322f74a4 | 507 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
508 | |
509 | if (ifa == NULL) { | |
510 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
511 | err = -ENOBUFS; | |
512 | goto out; | |
513 | } | |
514 | ||
515 | rt = addrconf_dst_alloc(idev, addr, 0); | |
516 | if (IS_ERR(rt)) { | |
517 | err = PTR_ERR(rt); | |
518 | goto out; | |
519 | } | |
520 | ||
1da177e4 LT |
521 | ipv6_addr_copy(&ifa->addr, addr); |
522 | ||
523 | spin_lock_init(&ifa->lock); | |
524 | init_timer(&ifa->timer); | |
525 | ifa->timer.data = (unsigned long) ifa; | |
526 | ifa->scope = scope; | |
527 | ifa->prefix_len = pfxlen; | |
528 | ifa->flags = flags | IFA_F_TENTATIVE; | |
529 | ifa->cstamp = ifa->tstamp = jiffies; | |
530 | ||
57f5f544 KF |
531 | ifa->rt = rt; |
532 | ||
95c385b4 NH |
533 | /* |
534 | * part one of RFC 4429, section 3.3 | |
535 | * We should not configure an address as | |
536 | * optimistic if we do not yet know the link | |
537 | * layer address of our nexhop router | |
538 | */ | |
539 | ||
540 | if (rt->rt6i_nexthop == NULL) | |
541 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
542 | ||
1da177e4 LT |
543 | ifa->idev = idev; |
544 | in6_dev_hold(idev); | |
545 | /* For caller */ | |
546 | in6_ifa_hold(ifa); | |
547 | ||
548 | /* Add to big hash table */ | |
549 | hash = ipv6_addr_hash(addr); | |
550 | ||
551 | ifa->lst_next = inet6_addr_lst[hash]; | |
552 | inet6_addr_lst[hash] = ifa; | |
553 | in6_ifa_hold(ifa); | |
554 | write_unlock(&addrconf_hash_lock); | |
555 | ||
556 | write_lock(&idev->lock); | |
557 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 558 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
559 | |
560 | #ifdef CONFIG_IPV6_PRIVACY | |
561 | if (ifa->flags&IFA_F_TEMPORARY) { | |
562 | ifa->tmp_next = idev->tempaddr_list; | |
563 | idev->tempaddr_list = ifa; | |
564 | in6_ifa_hold(ifa); | |
565 | } | |
566 | #endif | |
567 | ||
1da177e4 LT |
568 | in6_ifa_hold(ifa); |
569 | write_unlock(&idev->lock); | |
570 | out2: | |
8814c4b5 | 571 | rcu_read_unlock_bh(); |
1da177e4 | 572 | |
fd92833a | 573 | if (likely(err == 0)) |
e041c683 | 574 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
575 | else { |
576 | kfree(ifa); | |
577 | ifa = ERR_PTR(err); | |
578 | } | |
579 | ||
580 | return ifa; | |
581 | out: | |
582 | write_unlock(&addrconf_hash_lock); | |
583 | goto out2; | |
584 | } | |
585 | ||
586 | /* This function wants to get referenced ifp and releases it before return */ | |
587 | ||
588 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
589 | { | |
590 | struct inet6_ifaddr *ifa, **ifap; | |
591 | struct inet6_dev *idev = ifp->idev; | |
592 | int hash; | |
593 | int deleted = 0, onlink = 0; | |
594 | unsigned long expires = jiffies; | |
595 | ||
596 | hash = ipv6_addr_hash(&ifp->addr); | |
597 | ||
598 | ifp->dead = 1; | |
599 | ||
600 | write_lock_bh(&addrconf_hash_lock); | |
601 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
602 | ifap = &ifa->lst_next) { | |
603 | if (ifa == ifp) { | |
604 | *ifap = ifa->lst_next; | |
605 | __in6_ifa_put(ifp); | |
606 | ifa->lst_next = NULL; | |
607 | break; | |
608 | } | |
609 | } | |
610 | write_unlock_bh(&addrconf_hash_lock); | |
611 | ||
612 | write_lock_bh(&idev->lock); | |
613 | #ifdef CONFIG_IPV6_PRIVACY | |
614 | if (ifp->flags&IFA_F_TEMPORARY) { | |
615 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
616 | ifap = &ifa->tmp_next) { | |
617 | if (ifa == ifp) { | |
618 | *ifap = ifa->tmp_next; | |
619 | if (ifp->ifpub) { | |
620 | in6_ifa_put(ifp->ifpub); | |
621 | ifp->ifpub = NULL; | |
622 | } | |
623 | __in6_ifa_put(ifp); | |
624 | ifa->tmp_next = NULL; | |
625 | break; | |
626 | } | |
627 | } | |
628 | } | |
629 | #endif | |
630 | ||
1d142804 | 631 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
632 | if (ifa == ifp) { |
633 | *ifap = ifa->if_next; | |
634 | __in6_ifa_put(ifp); | |
635 | ifa->if_next = NULL; | |
636 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
637 | break; | |
638 | deleted = 1; | |
1d142804 | 639 | continue; |
1da177e4 LT |
640 | } else if (ifp->flags & IFA_F_PERMANENT) { |
641 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
642 | ifp->prefix_len)) { | |
643 | if (ifa->flags & IFA_F_PERMANENT) { | |
644 | onlink = 1; | |
645 | if (deleted) | |
646 | break; | |
647 | } else { | |
648 | unsigned long lifetime; | |
649 | ||
650 | if (!onlink) | |
651 | onlink = -1; | |
652 | ||
653 | spin_lock(&ifa->lock); | |
654 | lifetime = min_t(unsigned long, | |
655 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
656 | if (time_before(expires, | |
657 | ifa->tstamp + lifetime * HZ)) | |
658 | expires = ifa->tstamp + lifetime * HZ; | |
659 | spin_unlock(&ifa->lock); | |
660 | } | |
661 | } | |
662 | } | |
1d142804 | 663 | ifap = &ifa->if_next; |
1da177e4 LT |
664 | } |
665 | write_unlock_bh(&idev->lock); | |
666 | ||
667 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
668 | ||
e041c683 | 669 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
670 | |
671 | addrconf_del_timer(ifp); | |
672 | ||
673 | /* | |
674 | * Purge or update corresponding prefix | |
675 | * | |
676 | * 1) we don't purge prefix here if address was not permanent. | |
677 | * prefix is managed by its own lifetime. | |
678 | * 2) if there're no addresses, delete prefix. | |
679 | * 3) if there're still other permanent address(es), | |
680 | * corresponding prefix is still permanent. | |
681 | * 4) otherwise, update prefix lifetime to the | |
682 | * longest valid lifetime among the corresponding | |
683 | * addresses on the device. | |
684 | * Note: subsequent RA will update lifetime. | |
685 | * | |
686 | * --yoshfuji | |
687 | */ | |
688 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
689 | struct in6_addr prefix; | |
690 | struct rt6_info *rt; | |
691 | ||
692 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
693 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
694 | ||
695 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
696 | if (onlink == 0) { | |
e0a1ad73 | 697 | ip6_del_rt(rt); |
1da177e4 LT |
698 | rt = NULL; |
699 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
700 | rt->rt6i_expires = expires; | |
701 | rt->rt6i_flags |= RTF_EXPIRES; | |
702 | } | |
703 | } | |
704 | dst_release(&rt->u.dst); | |
705 | } | |
706 | ||
707 | in6_ifa_put(ifp); | |
708 | } | |
709 | ||
710 | #ifdef CONFIG_IPV6_PRIVACY | |
711 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
712 | { | |
713 | struct inet6_dev *idev = ifp->idev; | |
714 | struct in6_addr addr, *tmpaddr; | |
715 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
716 | int tmp_plen; | |
717 | int ret = 0; | |
718 | int max_addresses; | |
95c385b4 | 719 | u32 addr_flags; |
1da177e4 LT |
720 | |
721 | write_lock(&idev->lock); | |
722 | if (ift) { | |
723 | spin_lock_bh(&ift->lock); | |
724 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
725 | spin_unlock_bh(&ift->lock); | |
726 | tmpaddr = &addr; | |
727 | } else { | |
728 | tmpaddr = NULL; | |
729 | } | |
730 | retry: | |
731 | in6_dev_hold(idev); | |
732 | if (idev->cnf.use_tempaddr <= 0) { | |
733 | write_unlock(&idev->lock); | |
734 | printk(KERN_INFO | |
735 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
736 | in6_dev_put(idev); | |
737 | ret = -1; | |
738 | goto out; | |
739 | } | |
740 | spin_lock_bh(&ifp->lock); | |
741 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
742 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
743 | spin_unlock_bh(&ifp->lock); | |
744 | write_unlock(&idev->lock); | |
745 | printk(KERN_WARNING | |
746 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
747 | in6_dev_put(idev); | |
748 | ret = -1; | |
749 | goto out; | |
750 | } | |
751 | in6_ifa_hold(ifp); | |
752 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
753 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
754 | spin_unlock_bh(&ifp->lock); | |
755 | write_unlock(&idev->lock); | |
756 | printk(KERN_WARNING | |
757 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
758 | in6_ifa_put(ifp); | |
759 | in6_dev_put(idev); | |
760 | ret = -1; | |
761 | goto out; | |
762 | } | |
763 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
764 | tmp_valid_lft = min_t(__u32, | |
765 | ifp->valid_lft, | |
766 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
767 | tmp_prefered_lft = min_t(__u32, |
768 | ifp->prefered_lft, | |
1da177e4 LT |
769 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
770 | tmp_plen = ifp->prefix_len; | |
771 | max_addresses = idev->cnf.max_addresses; | |
772 | tmp_cstamp = ifp->cstamp; | |
773 | tmp_tstamp = ifp->tstamp; | |
774 | spin_unlock_bh(&ifp->lock); | |
775 | ||
776 | write_unlock(&idev->lock); | |
95c385b4 NH |
777 | |
778 | addr_flags = IFA_F_TEMPORARY; | |
779 | /* set in addrconf_prefix_rcv() */ | |
780 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
781 | addr_flags |= IFA_F_OPTIMISTIC; | |
782 | ||
1da177e4 | 783 | ift = !max_addresses || |
1ab1457c | 784 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 785 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
786 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
787 | addr_flags) : NULL; | |
1da177e4 LT |
788 | if (!ift || IS_ERR(ift)) { |
789 | in6_ifa_put(ifp); | |
790 | in6_dev_put(idev); | |
791 | printk(KERN_INFO | |
792 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
793 | tmpaddr = &addr; | |
794 | write_lock(&idev->lock); | |
795 | goto retry; | |
796 | } | |
797 | ||
798 | spin_lock_bh(&ift->lock); | |
799 | ift->ifpub = ifp; | |
800 | ift->valid_lft = tmp_valid_lft; | |
801 | ift->prefered_lft = tmp_prefered_lft; | |
802 | ift->cstamp = tmp_cstamp; | |
803 | ift->tstamp = tmp_tstamp; | |
804 | spin_unlock_bh(&ift->lock); | |
805 | ||
806 | addrconf_dad_start(ift, 0); | |
807 | in6_ifa_put(ift); | |
808 | in6_dev_put(idev); | |
809 | out: | |
810 | return ret; | |
811 | } | |
812 | #endif | |
813 | ||
814 | /* | |
072047e4 | 815 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 816 | */ |
072047e4 YH |
817 | struct ipv6_saddr_score { |
818 | int addr_type; | |
819 | unsigned int attrs; | |
820 | int matchlen; | |
0d27b427 | 821 | int scope; |
072047e4 YH |
822 | unsigned int rule; |
823 | }; | |
824 | ||
825 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
826 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
827 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
828 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
829 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
830 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
831 | ||
b6f99a21 | 832 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 833 | { |
072047e4 YH |
834 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
835 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
836 | return 1; | |
837 | return 0; | |
1da177e4 LT |
838 | } |
839 | ||
072047e4 | 840 | /* static matching label */ |
b6f99a21 | 841 | static inline int ipv6_saddr_label(const struct in6_addr *addr, int type) |
072047e4 YH |
842 | { |
843 | /* | |
844 | * prefix (longest match) label | |
845 | * ----------------------------- | |
846 | * ::1/128 0 | |
847 | * ::/0 1 | |
848 | * 2002::/16 2 | |
849 | * ::/96 3 | |
850 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
851 | * fc00::/7 5 |
852 | * 2001::/32 6 | |
072047e4 YH |
853 | */ |
854 | if (type & IPV6_ADDR_LOOPBACK) | |
855 | return 0; | |
856 | else if (type & IPV6_ADDR_COMPATv4) | |
857 | return 3; | |
858 | else if (type & IPV6_ADDR_MAPPED) | |
859 | return 4; | |
102128e3 ŁS |
860 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
861 | return 6; | |
072047e4 YH |
862 | else if (addr->s6_addr16[0] == htons(0x2002)) |
863 | return 2; | |
102128e3 ŁS |
864 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
865 | return 5; | |
072047e4 YH |
866 | return 1; |
867 | } | |
1da177e4 | 868 | |
072047e4 | 869 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
870 | struct in6_addr *daddr, struct in6_addr *saddr) |
871 | { | |
072047e4 YH |
872 | struct ipv6_saddr_score hiscore; |
873 | struct inet6_ifaddr *ifa_result = NULL; | |
874 | int daddr_type = __ipv6_addr_type(daddr); | |
875 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
876 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
877 | struct net_device *dev; | |
1da177e4 | 878 | |
072047e4 | 879 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 880 | |
072047e4 | 881 | read_lock(&dev_base_lock); |
8814c4b5 | 882 | rcu_read_lock(); |
1da177e4 | 883 | |
072047e4 YH |
884 | for (dev = dev_base; dev; dev=dev->next) { |
885 | struct inet6_dev *idev; | |
886 | struct inet6_ifaddr *ifa; | |
887 | ||
888 | /* Rule 0: Candidate Source Address (section 4) | |
889 | * - multicast and link-local destination address, | |
890 | * the set of candidate source address MUST only | |
891 | * include addresses assigned to interfaces | |
892 | * belonging to the same link as the outgoing | |
893 | * interface. | |
894 | * (- For site-local destination addresses, the | |
895 | * set of candidate source addresses MUST only | |
896 | * include addresses assigned to interfaces | |
897 | * belonging to the same site as the outgoing | |
898 | * interface.) | |
899 | */ | |
900 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
901 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
902 | daddr_dev && dev != daddr_dev) | |
903 | continue; | |
1da177e4 | 904 | |
1da177e4 | 905 | idev = __in6_dev_get(dev); |
072047e4 YH |
906 | if (!idev) |
907 | continue; | |
908 | ||
909 | read_lock_bh(&idev->lock); | |
910 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
911 | struct ipv6_saddr_score score; | |
912 | ||
913 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
914 | ||
6b3ae80a YH |
915 | /* Rule 0: |
916 | * - Tentative Address (RFC2462 section 5.4) | |
917 | * - A tentative address is not considered | |
918 | * "assigned to an interface" in the traditional | |
95c385b4 | 919 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 920 | * - Candidate Source Address (section 4) |
072047e4 YH |
921 | * - In any case, anycast addresses, multicast |
922 | * addresses, and the unspecified address MUST | |
923 | * NOT be included in a candidate set. | |
924 | */ | |
95c385b4 NH |
925 | if ((ifa->flags & IFA_F_TENTATIVE) && |
926 | (!(ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 927 | continue; |
072047e4 YH |
928 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
929 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
930 | LIMIT_NETDEBUG(KERN_DEBUG | |
931 | "ADDRCONF: unspecified / multicast address" | |
932 | "assigned as unicast address on %s", | |
933 | dev->name); | |
934 | continue; | |
935 | } | |
936 | ||
937 | score.attrs = 0; | |
938 | score.matchlen = 0; | |
939 | score.scope = 0; | |
940 | score.rule = 0; | |
941 | ||
942 | if (ifa_result == NULL) { | |
943 | /* record it if the first available entry */ | |
944 | goto record_it; | |
945 | } | |
946 | ||
947 | /* Rule 1: Prefer same address */ | |
948 | if (hiscore.rule < 1) { | |
949 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
950 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
951 | hiscore.rule++; | |
952 | } | |
953 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
954 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
955 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
956 | score.rule = 1; | |
957 | goto record_it; | |
1da177e4 | 958 | } |
072047e4 YH |
959 | } else { |
960 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
961 | continue; | |
1da177e4 | 962 | } |
1da177e4 | 963 | |
072047e4 YH |
964 | /* Rule 2: Prefer appropriate scope */ |
965 | if (hiscore.rule < 2) { | |
966 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
967 | hiscore.rule++; | |
968 | } | |
969 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
970 | if (hiscore.scope < score.scope) { | |
971 | if (hiscore.scope < daddr_scope) { | |
972 | score.rule = 2; | |
973 | goto record_it; | |
974 | } else | |
975 | continue; | |
976 | } else if (score.scope < hiscore.scope) { | |
977 | if (score.scope < daddr_scope) | |
e55ffac6 | 978 | break; /* addresses sorted by scope */ |
072047e4 YH |
979 | else { |
980 | score.rule = 2; | |
981 | goto record_it; | |
982 | } | |
983 | } | |
1da177e4 | 984 | |
95c385b4 | 985 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
072047e4 YH |
986 | if (hiscore.rule < 3) { |
987 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
95c385b4 NH |
988 | (((ifa_result->flags & |
989 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) | |
072047e4 YH |
990 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
991 | hiscore.rule++; | |
992 | } | |
993 | if (ipv6_saddr_preferred(score.addr_type) || | |
95c385b4 NH |
994 | (((ifa_result->flags & |
995 | (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { | |
072047e4 YH |
996 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; |
997 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
998 | score.rule = 3; | |
999 | goto record_it; | |
1000 | } | |
1001 | } else { | |
1002 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1003 | continue; | |
1004 | } | |
1da177e4 | 1005 | |
3b9f9a1c NT |
1006 | /* Rule 4: Prefer home address */ |
1007 | #ifdef CONFIG_IPV6_MIP6 | |
1008 | if (hiscore.rule < 4) { | |
1009 | if (ifa_result->flags & IFA_F_HOMEADDRESS) | |
1010 | hiscore.attrs |= IPV6_SADDR_SCORE_HOA; | |
1011 | hiscore.rule++; | |
1012 | } | |
1013 | if (ifa->flags & IFA_F_HOMEADDRESS) { | |
1014 | score.attrs |= IPV6_SADDR_SCORE_HOA; | |
1015 | if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { | |
1016 | score.rule = 4; | |
1017 | goto record_it; | |
1018 | } | |
1019 | } else { | |
1020 | if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) | |
1021 | continue; | |
1022 | } | |
1023 | #else | |
220bbd74 YH |
1024 | if (hiscore.rule < 4) |
1025 | hiscore.rule++; | |
3b9f9a1c | 1026 | #endif |
072047e4 YH |
1027 | |
1028 | /* Rule 5: Prefer outgoing interface */ | |
1029 | if (hiscore.rule < 5) { | |
1030 | if (daddr_dev == NULL || | |
1031 | daddr_dev == ifa_result->idev->dev) | |
1032 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1033 | hiscore.rule++; | |
1034 | } | |
1035 | if (daddr_dev == NULL || | |
1036 | daddr_dev == ifa->idev->dev) { | |
1037 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1038 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1039 | score.rule = 5; | |
1040 | goto record_it; | |
1041 | } | |
1042 | } else { | |
1043 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1044 | continue; | |
1045 | } | |
1046 | ||
1047 | /* Rule 6: Prefer matching label */ | |
1048 | if (hiscore.rule < 6) { | |
1049 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1050 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1051 | hiscore.rule++; | |
1052 | } | |
1053 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1054 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1055 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1056 | score.rule = 6; | |
1057 | goto record_it; | |
1da177e4 | 1058 | } |
072047e4 YH |
1059 | } else { |
1060 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1061 | continue; | |
1062 | } | |
1063 | ||
44fd0261 | 1064 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1065 | /* Rule 7: Prefer public address |
1066 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1067 | */ | |
1068 | if (hiscore.rule < 7) { | |
1069 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1070 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1071 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1072 | hiscore.rule++; | |
1073 | } | |
1074 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1075 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1076 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1077 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1078 | score.rule = 7; | |
1079 | goto record_it; | |
1080 | } | |
1081 | } else { | |
1082 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1083 | continue; | |
1084 | } | |
5e2707fa YH |
1085 | #else |
1086 | if (hiscore.rule < 7) | |
1087 | hiscore.rule++; | |
44fd0261 | 1088 | #endif |
072047e4 | 1089 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1090 | if (hiscore.rule < 8) { |
072047e4 | 1091 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1092 | hiscore.rule++; |
1093 | } | |
072047e4 YH |
1094 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1095 | if (score.matchlen > hiscore.matchlen) { | |
1096 | score.rule = 8; | |
1097 | goto record_it; | |
1da177e4 | 1098 | } |
072047e4 YH |
1099 | #if 0 |
1100 | else if (score.matchlen < hiscore.matchlen) | |
1101 | continue; | |
1102 | #endif | |
1103 | ||
1104 | /* Final Rule: choose first available one */ | |
1105 | continue; | |
1106 | record_it: | |
1107 | if (ifa_result) | |
1108 | in6_ifa_put(ifa_result); | |
1109 | in6_ifa_hold(ifa); | |
1110 | ifa_result = ifa; | |
1111 | hiscore = score; | |
1da177e4 | 1112 | } |
072047e4 | 1113 | read_unlock_bh(&idev->lock); |
1da177e4 | 1114 | } |
8814c4b5 | 1115 | rcu_read_unlock(); |
1da177e4 LT |
1116 | read_unlock(&dev_base_lock); |
1117 | ||
072047e4 YH |
1118 | if (!ifa_result) |
1119 | return -EADDRNOTAVAIL; | |
1ab1457c | 1120 | |
072047e4 YH |
1121 | ipv6_addr_copy(saddr, &ifa_result->addr); |
1122 | in6_ifa_put(ifa_result); | |
1123 | return 0; | |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | ||
1127 | int ipv6_get_saddr(struct dst_entry *dst, | |
1128 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1129 | { | |
7a3025b1 | 1130 | return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); |
1da177e4 LT |
1131 | } |
1132 | ||
7159039a | 1133 | EXPORT_SYMBOL(ipv6_get_saddr); |
1da177e4 | 1134 | |
95c385b4 NH |
1135 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1136 | unsigned char banned_flags) | |
1da177e4 LT |
1137 | { |
1138 | struct inet6_dev *idev; | |
1139 | int err = -EADDRNOTAVAIL; | |
1140 | ||
8814c4b5 | 1141 | rcu_read_lock(); |
1da177e4 LT |
1142 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1143 | struct inet6_ifaddr *ifp; | |
1144 | ||
1145 | read_lock_bh(&idev->lock); | |
1146 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1147 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1148 | ipv6_addr_copy(addr, &ifp->addr); |
1149 | err = 0; | |
1150 | break; | |
1151 | } | |
1152 | } | |
1153 | read_unlock_bh(&idev->lock); | |
1154 | } | |
8814c4b5 | 1155 | rcu_read_unlock(); |
1da177e4 LT |
1156 | return err; |
1157 | } | |
1158 | ||
1159 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1160 | { | |
1161 | int cnt = 0; | |
1162 | struct inet6_ifaddr *ifp; | |
1163 | ||
1164 | read_lock_bh(&idev->lock); | |
1165 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1166 | cnt++; | |
1167 | read_unlock_bh(&idev->lock); | |
1168 | return cnt; | |
1169 | } | |
1170 | ||
1171 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1172 | { | |
1173 | struct inet6_ifaddr * ifp; | |
1174 | u8 hash = ipv6_addr_hash(addr); | |
1175 | ||
1176 | read_lock_bh(&addrconf_hash_lock); | |
1177 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1178 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1179 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1180 | if (dev == NULL || ifp->idev->dev == dev || | |
1181 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1182 | break; | |
1183 | } | |
1184 | } | |
1185 | read_unlock_bh(&addrconf_hash_lock); | |
1186 | return ifp != NULL; | |
1187 | } | |
1188 | ||
7159039a YH |
1189 | EXPORT_SYMBOL(ipv6_chk_addr); |
1190 | ||
1da177e4 LT |
1191 | static |
1192 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1193 | { | |
1194 | struct inet6_ifaddr * ifp; | |
1195 | u8 hash = ipv6_addr_hash(addr); | |
1196 | ||
1197 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1198 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1199 | if (dev == NULL || ifp->idev->dev == dev) | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | return ifp != NULL; | |
1204 | } | |
1205 | ||
1206 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1207 | { | |
1208 | struct inet6_ifaddr * ifp; | |
1209 | u8 hash = ipv6_addr_hash(addr); | |
1210 | ||
1211 | read_lock_bh(&addrconf_hash_lock); | |
1212 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1213 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1214 | if (dev == NULL || ifp->idev->dev == dev || | |
1215 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1216 | in6_ifa_hold(ifp); | |
1217 | break; | |
1218 | } | |
1219 | } | |
1220 | } | |
1221 | read_unlock_bh(&addrconf_hash_lock); | |
1222 | ||
1223 | return ifp; | |
1224 | } | |
1225 | ||
1226 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1227 | { | |
1228 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1229 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1230 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1231 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1232 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1233 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1234 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1235 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1236 | ||
1237 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1238 | return 1; | |
1239 | ||
1240 | if (addr_type2 == IPV6_ADDR_ANY && | |
1241 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1242 | return 1; | |
1243 | ||
1244 | if (addr_type == IPV6_ADDR_ANY && | |
1245 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1246 | return 1; | |
1247 | ||
1248 | if (sk2_rcv_saddr6 && | |
1249 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1250 | return 1; | |
1251 | ||
1252 | if (addr_type == IPV6_ADDR_MAPPED && | |
1253 | !sk2_ipv6only && | |
1254 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1255 | return 1; | |
1256 | ||
1257 | return 0; | |
1258 | } | |
1259 | ||
1260 | /* Gets referenced address, destroys ifaddr */ | |
1261 | ||
9f5336e2 | 1262 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1263 | { |
1da177e4 LT |
1264 | if (ifp->flags&IFA_F_PERMANENT) { |
1265 | spin_lock_bh(&ifp->lock); | |
1266 | addrconf_del_timer(ifp); | |
1267 | ifp->flags |= IFA_F_TENTATIVE; | |
1268 | spin_unlock_bh(&ifp->lock); | |
1269 | in6_ifa_put(ifp); | |
1270 | #ifdef CONFIG_IPV6_PRIVACY | |
1271 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1272 | struct inet6_ifaddr *ifpub; | |
1273 | spin_lock_bh(&ifp->lock); | |
1274 | ifpub = ifp->ifpub; | |
1275 | if (ifpub) { | |
1276 | in6_ifa_hold(ifpub); | |
1277 | spin_unlock_bh(&ifp->lock); | |
1278 | ipv6_create_tempaddr(ifpub, ifp); | |
1279 | in6_ifa_put(ifpub); | |
1280 | } else { | |
1281 | spin_unlock_bh(&ifp->lock); | |
1282 | } | |
1283 | ipv6_del_addr(ifp); | |
1284 | #endif | |
1285 | } else | |
1286 | ipv6_del_addr(ifp); | |
1287 | } | |
1288 | ||
3c21edbd YH |
1289 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1290 | { | |
1291 | if (net_ratelimit()) | |
1292 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1293 | addrconf_dad_stop(ifp); | |
1294 | } | |
1da177e4 LT |
1295 | |
1296 | /* Join to solicited addr multicast group. */ | |
1297 | ||
1298 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1299 | { | |
1300 | struct in6_addr maddr; | |
1301 | ||
1302 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1303 | return; | |
1304 | ||
1305 | addrconf_addr_solict_mult(addr, &maddr); | |
1306 | ipv6_dev_mc_inc(dev, &maddr); | |
1307 | } | |
1308 | ||
1309 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1310 | { | |
1311 | struct in6_addr maddr; | |
1312 | ||
1313 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1314 | return; | |
1315 | ||
1316 | addrconf_addr_solict_mult(addr, &maddr); | |
1317 | __ipv6_dev_mc_dec(idev, &maddr); | |
1318 | } | |
1319 | ||
20380731 | 1320 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1321 | { |
1322 | struct in6_addr addr; | |
1323 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1324 | if (ipv6_addr_any(&addr)) | |
1325 | return; | |
1326 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1327 | } | |
1328 | ||
20380731 | 1329 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1330 | { |
1331 | struct in6_addr addr; | |
1332 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1333 | if (ipv6_addr_any(&addr)) | |
1334 | return; | |
1335 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1336 | } | |
1337 | ||
073a8e0e YH |
1338 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1339 | { | |
1340 | if (dev->addr_len != ETH_ALEN) | |
1341 | return -1; | |
1342 | memcpy(eui, dev->dev_addr, 3); | |
1343 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1344 | ||
1345 | /* | |
1346 | * The zSeries OSA network cards can be shared among various | |
1347 | * OS instances, but the OSA cards have only one MAC address. | |
1348 | * This leads to duplicate address conflicts in conjunction | |
1349 | * with IPv6 if more than one instance uses the same card. | |
1350 | * | |
1351 | * The driver for these cards can deliver a unique 16-bit | |
1352 | * identifier for each instance sharing the same card. It is | |
1353 | * placed instead of 0xFFFE in the interface identifier. The | |
1354 | * "u" bit of the interface identifier is not inverted in this | |
1355 | * case. Hence the resulting interface identifier has local | |
1356 | * scope according to RFC2373. | |
1357 | */ | |
1358 | if (dev->dev_id) { | |
1359 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1360 | eui[4] = dev->dev_id & 0xFF; | |
1361 | } else { | |
1362 | eui[3] = 0xFF; | |
1363 | eui[4] = 0xFE; | |
1364 | eui[0] ^= 2; | |
1365 | } | |
1366 | return 0; | |
1367 | } | |
1368 | ||
1369 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1370 | { | |
1371 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1372 | if (dev->addr_len != ARCNET_ALEN) | |
1373 | return -1; | |
1374 | memset(eui, 0, 7); | |
1375 | eui[7] = *(u8*)dev->dev_addr; | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1380 | { | |
1381 | if (dev->addr_len != INFINIBAND_ALEN) | |
1382 | return -1; | |
1383 | memcpy(eui, dev->dev_addr + 12, 8); | |
1384 | eui[0] |= 2; | |
1385 | return 0; | |
1386 | } | |
1387 | ||
1da177e4 LT |
1388 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1389 | { | |
1390 | switch (dev->type) { | |
1391 | case ARPHRD_ETHER: | |
1392 | case ARPHRD_FDDI: | |
1393 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1394 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1395 | case ARPHRD_ARCNET: |
073a8e0e | 1396 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1397 | case ARPHRD_INFINIBAND: |
073a8e0e | 1398 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1399 | } |
1400 | return -1; | |
1401 | } | |
1402 | ||
1403 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1404 | { | |
1405 | int err = -1; | |
1406 | struct inet6_ifaddr *ifp; | |
1407 | ||
1408 | read_lock_bh(&idev->lock); | |
1409 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1410 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1411 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1412 | err = 0; | |
1413 | break; | |
1414 | } | |
1415 | } | |
1416 | read_unlock_bh(&idev->lock); | |
1417 | return err; | |
1418 | } | |
1419 | ||
1420 | #ifdef CONFIG_IPV6_PRIVACY | |
1421 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1422 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1423 | { | |
1da177e4 | 1424 | regen: |
955189ef | 1425 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1426 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1427 | |
1428 | /* | |
1429 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1430 | * check if generated address is not inappropriate | |
1431 | * | |
1432 | * - Reserved subnet anycast (RFC 2526) | |
1433 | * 11111101 11....11 1xxxxxxx | |
1434 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1435 | * 00-00-5E-FE-xx-xx-xx-xx | |
1436 | * - value 0 | |
1437 | * - XXX: already assigned to an address on the device | |
1438 | */ | |
1ab1457c | 1439 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1440 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1441 | (idev->rndid[7]&0x80)) | |
1442 | goto regen; | |
1443 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1444 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1445 | goto regen; | |
1446 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1447 | goto regen; | |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | static void ipv6_regen_rndid(unsigned long data) | |
1454 | { | |
1455 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1456 | unsigned long expires; | |
1457 | ||
8814c4b5 | 1458 | rcu_read_lock_bh(); |
1da177e4 LT |
1459 | write_lock_bh(&idev->lock); |
1460 | ||
1461 | if (idev->dead) | |
1462 | goto out; | |
1463 | ||
1464 | if (__ipv6_regen_rndid(idev) < 0) | |
1465 | goto out; | |
1ab1457c | 1466 | |
1da177e4 | 1467 | expires = jiffies + |
1ab1457c | 1468 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1469 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1470 | if (time_before(expires, jiffies)) { | |
1471 | printk(KERN_WARNING | |
1472 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1473 | idev->dev->name); | |
1474 | goto out; | |
1475 | } | |
1476 | ||
1477 | if (!mod_timer(&idev->regen_timer, expires)) | |
1478 | in6_dev_hold(idev); | |
1479 | ||
1480 | out: | |
1481 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1482 | rcu_read_unlock_bh(); |
1da177e4 LT |
1483 | in6_dev_put(idev); |
1484 | } | |
1485 | ||
1486 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1487 | int ret = 0; | |
1488 | ||
1489 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1490 | ret = __ipv6_regen_rndid(idev); | |
1491 | return ret; | |
1492 | } | |
1493 | #endif | |
1494 | ||
1495 | /* | |
1496 | * Add prefix route. | |
1497 | */ | |
1498 | ||
1499 | static void | |
1500 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1501 | unsigned long expires, u32 flags) |
1da177e4 | 1502 | { |
86872cb5 TG |
1503 | struct fib6_config cfg = { |
1504 | .fc_table = RT6_TABLE_PREFIX, | |
1505 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1506 | .fc_ifindex = dev->ifindex, | |
1507 | .fc_expires = expires, | |
1508 | .fc_dst_len = plen, | |
1509 | .fc_flags = RTF_UP | flags, | |
1510 | }; | |
1da177e4 | 1511 | |
86872cb5 | 1512 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1513 | |
1514 | /* Prevent useless cloning on PtP SIT. | |
1515 | This thing is done here expecting that the whole | |
1516 | class of non-broadcast devices need not cloning. | |
1517 | */ | |
0be669bb | 1518 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1519 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1520 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1521 | #endif |
1da177e4 | 1522 | |
86872cb5 | 1523 | ip6_route_add(&cfg); |
1da177e4 LT |
1524 | } |
1525 | ||
1526 | /* Create "default" multicast route to the interface */ | |
1527 | ||
1528 | static void addrconf_add_mroute(struct net_device *dev) | |
1529 | { | |
86872cb5 TG |
1530 | struct fib6_config cfg = { |
1531 | .fc_table = RT6_TABLE_LOCAL, | |
1532 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1533 | .fc_ifindex = dev->ifindex, | |
1534 | .fc_dst_len = 8, | |
1535 | .fc_flags = RTF_UP, | |
1536 | }; | |
1537 | ||
1538 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1539 | ||
1540 | ip6_route_add(&cfg); | |
1da177e4 LT |
1541 | } |
1542 | ||
0be669bb | 1543 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1544 | static void sit_route_add(struct net_device *dev) |
1545 | { | |
86872cb5 TG |
1546 | struct fib6_config cfg = { |
1547 | .fc_table = RT6_TABLE_MAIN, | |
1548 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1549 | .fc_ifindex = dev->ifindex, | |
1550 | .fc_dst_len = 96, | |
1551 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
1552 | }; | |
1da177e4 LT |
1553 | |
1554 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1555 | ip6_route_add(&cfg); |
1da177e4 | 1556 | } |
0be669bb | 1557 | #endif |
1da177e4 LT |
1558 | |
1559 | static void addrconf_add_lroute(struct net_device *dev) | |
1560 | { | |
1561 | struct in6_addr addr; | |
1562 | ||
1563 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1564 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1565 | } | |
1566 | ||
1567 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1568 | { | |
1569 | struct inet6_dev *idev; | |
1570 | ||
1571 | ASSERT_RTNL(); | |
1572 | ||
1573 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1574 | return NULL; | |
1575 | ||
1576 | /* Add default multicast route */ | |
1577 | addrconf_add_mroute(dev); | |
1578 | ||
1579 | /* Add link local route */ | |
1580 | addrconf_add_lroute(dev); | |
1581 | return idev; | |
1582 | } | |
1583 | ||
1584 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1585 | { | |
1586 | struct prefix_info *pinfo; | |
1587 | __u32 valid_lft; | |
1588 | __u32 prefered_lft; | |
1589 | int addr_type; | |
1590 | unsigned long rt_expires; | |
1591 | struct inet6_dev *in6_dev; | |
1592 | ||
1593 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1594 | |
1da177e4 LT |
1595 | if (len < sizeof(struct prefix_info)) { |
1596 | ADBG(("addrconf: prefix option too short\n")); | |
1597 | return; | |
1598 | } | |
1ab1457c | 1599 | |
1da177e4 LT |
1600 | /* |
1601 | * Validation checks ([ADDRCONF], page 19) | |
1602 | */ | |
1603 | ||
1604 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1605 | ||
1606 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1607 | return; | |
1608 | ||
1609 | valid_lft = ntohl(pinfo->valid); | |
1610 | prefered_lft = ntohl(pinfo->prefered); | |
1611 | ||
1612 | if (prefered_lft > valid_lft) { | |
1613 | if (net_ratelimit()) | |
1614 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1615 | return; | |
1616 | } | |
1617 | ||
1618 | in6_dev = in6_dev_get(dev); | |
1619 | ||
1620 | if (in6_dev == NULL) { | |
1621 | if (net_ratelimit()) | |
1622 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1623 | return; | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Two things going on here: | |
1628 | * 1) Add routes for on-link prefixes | |
1629 | * 2) Configure prefixes with the auto flag set | |
1630 | */ | |
1631 | ||
1632 | /* Avoid arithmetic overflow. Really, we could | |
1633 | save rt_expires in seconds, likely valid_lft, | |
1634 | but it would require division in fib gc, that it | |
1635 | not good. | |
1636 | */ | |
1637 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1638 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1639 | else |
3dd4bc68 YH |
1640 | rt_expires = valid_lft * HZ; |
1641 | ||
1642 | /* | |
1643 | * We convert this (in jiffies) to clock_t later. | |
1644 | * Avoid arithmetic overflow there as well. | |
1645 | * Overflow can happen only if HZ < USER_HZ. | |
1646 | */ | |
1647 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1648 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1649 | |
1650 | if (pinfo->onlink) { | |
1651 | struct rt6_info *rt; | |
1652 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1653 | ||
1654 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1655 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1656 | if (valid_lft == 0) { | |
e0a1ad73 | 1657 | ip6_del_rt(rt); |
1da177e4 LT |
1658 | rt = NULL; |
1659 | } else { | |
3dd4bc68 | 1660 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1661 | } |
1662 | } | |
1663 | } else if (valid_lft) { | |
1664 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1665 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1666 | } |
1667 | if (rt) | |
1668 | dst_release(&rt->u.dst); | |
1669 | } | |
1670 | ||
1671 | /* Try to figure out our local address for this prefix */ | |
1672 | ||
1673 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1674 | struct inet6_ifaddr * ifp; | |
1675 | struct in6_addr addr; | |
1676 | int create = 0, update_lft = 0; | |
1677 | ||
1678 | if (pinfo->prefix_len == 64) { | |
1679 | memcpy(&addr, &pinfo->prefix, 8); | |
1680 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1681 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1682 | in6_dev_put(in6_dev); | |
1683 | return; | |
1684 | } | |
1685 | goto ok; | |
1686 | } | |
1687 | if (net_ratelimit()) | |
1688 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1689 | pinfo->prefix_len); | |
1690 | in6_dev_put(in6_dev); | |
1691 | return; | |
1692 | ||
1693 | ok: | |
1694 | ||
1695 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1696 | ||
1697 | if (ifp == NULL && valid_lft) { | |
1698 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1699 | u32 addr_flags = 0; |
1700 | ||
1701 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1702 | if (in6_dev->cnf.optimistic_dad && | |
1703 | !ipv6_devconf.forwarding) | |
1704 | addr_flags = IFA_F_OPTIMISTIC; | |
1705 | #endif | |
1da177e4 LT |
1706 | |
1707 | /* Do not allow to create too much of autoconfigured | |
1708 | * addresses; this would be too easy way to crash kernel. | |
1709 | */ | |
1710 | if (!max_addresses || | |
1711 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1712 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1713 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1714 | addr_flags); | |
1da177e4 LT |
1715 | |
1716 | if (!ifp || IS_ERR(ifp)) { | |
1717 | in6_dev_put(in6_dev); | |
1718 | return; | |
1719 | } | |
1720 | ||
1721 | update_lft = create = 1; | |
1722 | ifp->cstamp = jiffies; | |
1723 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1724 | } | |
1725 | ||
1726 | if (ifp) { | |
1727 | int flags; | |
1728 | unsigned long now; | |
1729 | #ifdef CONFIG_IPV6_PRIVACY | |
1730 | struct inet6_ifaddr *ift; | |
1731 | #endif | |
1732 | u32 stored_lft; | |
1733 | ||
1734 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1735 | spin_lock(&ifp->lock); | |
1736 | now = jiffies; | |
1737 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1738 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1739 | else | |
1740 | stored_lft = 0; | |
1741 | if (!update_lft && stored_lft) { | |
1742 | if (valid_lft > MIN_VALID_LIFETIME || | |
1743 | valid_lft > stored_lft) | |
1744 | update_lft = 1; | |
1745 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1746 | /* valid_lft <= stored_lft is always true */ | |
1747 | /* XXX: IPsec */ | |
1748 | update_lft = 0; | |
1749 | } else { | |
1750 | valid_lft = MIN_VALID_LIFETIME; | |
1751 | if (valid_lft < prefered_lft) | |
1752 | prefered_lft = valid_lft; | |
1753 | update_lft = 1; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | if (update_lft) { | |
1758 | ifp->valid_lft = valid_lft; | |
1759 | ifp->prefered_lft = prefered_lft; | |
1760 | ifp->tstamp = now; | |
1761 | flags = ifp->flags; | |
1762 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1763 | spin_unlock(&ifp->lock); | |
1764 | ||
1765 | if (!(flags&IFA_F_TENTATIVE)) | |
1766 | ipv6_ifa_notify(0, ifp); | |
1767 | } else | |
1768 | spin_unlock(&ifp->lock); | |
1769 | ||
1770 | #ifdef CONFIG_IPV6_PRIVACY | |
1771 | read_lock_bh(&in6_dev->lock); | |
1772 | /* update all temporary addresses in the list */ | |
1773 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1774 | /* | |
1775 | * When adjusting the lifetimes of an existing | |
1776 | * temporary address, only lower the lifetimes. | |
1777 | * Implementations must not increase the | |
1778 | * lifetimes of an existing temporary address | |
1779 | * when processing a Prefix Information Option. | |
1780 | */ | |
1781 | spin_lock(&ift->lock); | |
1782 | flags = ift->flags; | |
1783 | if (ift->valid_lft > valid_lft && | |
1784 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1785 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1786 | if (ift->prefered_lft > prefered_lft && | |
1787 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1788 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1789 | spin_unlock(&ift->lock); | |
1790 | if (!(flags&IFA_F_TENTATIVE)) | |
1791 | ipv6_ifa_notify(0, ift); | |
1792 | } | |
1793 | ||
1794 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1795 | /* | |
1796 | * When a new public address is created as described in [ADDRCONF], | |
1797 | * also create a new temporary address. | |
1798 | */ | |
1ab1457c | 1799 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1800 | ipv6_create_tempaddr(ifp, NULL); |
1801 | } else { | |
1802 | read_unlock_bh(&in6_dev->lock); | |
1803 | } | |
1804 | #endif | |
1805 | in6_ifa_put(ifp); | |
1806 | addrconf_verify(0); | |
1807 | } | |
1808 | } | |
1809 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1810 | in6_dev_put(in6_dev); | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * Set destination address. | |
1815 | * Special case for SIT interfaces where we create a new "virtual" | |
1816 | * device. | |
1817 | */ | |
1818 | int addrconf_set_dstaddr(void __user *arg) | |
1819 | { | |
1820 | struct in6_ifreq ireq; | |
1821 | struct net_device *dev; | |
1822 | int err = -EINVAL; | |
1823 | ||
1824 | rtnl_lock(); | |
1825 | ||
1826 | err = -EFAULT; | |
1827 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1828 | goto err_exit; | |
1829 | ||
1830 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1831 | ||
1832 | err = -ENODEV; | |
1833 | if (dev == NULL) | |
1834 | goto err_exit; | |
1835 | ||
0be669bb | 1836 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1837 | if (dev->type == ARPHRD_SIT) { |
1838 | struct ifreq ifr; | |
1839 | mm_segment_t oldfs; | |
1840 | struct ip_tunnel_parm p; | |
1841 | ||
1842 | err = -EADDRNOTAVAIL; | |
1843 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1844 | goto err_exit; | |
1845 | ||
1846 | memset(&p, 0, sizeof(p)); | |
1847 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1848 | p.iph.saddr = 0; | |
1849 | p.iph.version = 4; | |
1850 | p.iph.ihl = 5; | |
1851 | p.iph.protocol = IPPROTO_IPV6; | |
1852 | p.iph.ttl = 64; | |
1853 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1854 | ||
1855 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1856 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1857 | set_fs(oldfs); | |
1858 | ||
1859 | if (err == 0) { | |
1860 | err = -ENOBUFS; | |
1861 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1862 | goto err_exit; | |
1863 | err = dev_open(dev); | |
1864 | } | |
1865 | } | |
0be669bb | 1866 | #endif |
1da177e4 LT |
1867 | |
1868 | err_exit: | |
1869 | rtnl_unlock(); | |
1870 | return err; | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * Manual configuration of address on an interface | |
1875 | */ | |
0778769d | 1876 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
55ebaef1 | 1877 | __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) |
1da177e4 LT |
1878 | { |
1879 | struct inet6_ifaddr *ifp; | |
1880 | struct inet6_dev *idev; | |
1881 | struct net_device *dev; | |
1882 | int scope; | |
46d48046 | 1883 | u32 flags = RTF_EXPIRES; |
1da177e4 LT |
1884 | |
1885 | ASSERT_RTNL(); | |
1ab1457c | 1886 | |
0778769d NT |
1887 | /* check the lifetime */ |
1888 | if (!valid_lft || prefered_lft > valid_lft) | |
1889 | return -EINVAL; | |
1890 | ||
1da177e4 LT |
1891 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1892 | return -ENODEV; | |
1ab1457c | 1893 | |
1da177e4 LT |
1894 | if ((idev = addrconf_add_dev(dev)) == NULL) |
1895 | return -ENOBUFS; | |
1896 | ||
1897 | scope = ipv6_addr_scope(pfx); | |
1898 | ||
46d48046 | 1899 | if (valid_lft == INFINITY_LIFE_TIME) { |
0778769d | 1900 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
1901 | flags = 0; |
1902 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
0778769d NT |
1903 | valid_lft = 0x7FFFFFFF/HZ; |
1904 | ||
1905 | if (prefered_lft == 0) | |
1906 | ifa_flags |= IFA_F_DEPRECATED; | |
1907 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1908 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1909 | prefered_lft = 0x7FFFFFFF/HZ; | |
1910 | ||
1911 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1912 | ||
1da177e4 | 1913 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1914 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1915 | ifp->valid_lft = valid_lft; |
1916 | ifp->prefered_lft = prefered_lft; | |
1917 | ifp->tstamp = jiffies; | |
06aebfb7 | 1918 | spin_unlock_bh(&ifp->lock); |
0778769d | 1919 | |
46d48046 YH |
1920 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
1921 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
95c385b4 NH |
1922 | /* |
1923 | * Note that section 3.1 of RFC 4429 indicates | |
1924 | * that the Optimistic flag should not be set for | |
1925 | * manually configured addresses | |
1926 | */ | |
1da177e4 LT |
1927 | addrconf_dad_start(ifp, 0); |
1928 | in6_ifa_put(ifp); | |
0778769d | 1929 | addrconf_verify(0); |
1da177e4 LT |
1930 | return 0; |
1931 | } | |
1932 | ||
1933 | return PTR_ERR(ifp); | |
1934 | } | |
1935 | ||
1936 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1937 | { | |
1938 | struct inet6_ifaddr *ifp; | |
1939 | struct inet6_dev *idev; | |
1940 | struct net_device *dev; | |
1ab1457c | 1941 | |
1da177e4 LT |
1942 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1943 | return -ENODEV; | |
1944 | ||
1945 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1946 | return -ENXIO; | |
1947 | ||
1948 | read_lock_bh(&idev->lock); | |
1949 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1950 | if (ifp->prefix_len == plen && | |
1951 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1952 | in6_ifa_hold(ifp); | |
1953 | read_unlock_bh(&idev->lock); | |
1ab1457c | 1954 | |
1da177e4 LT |
1955 | ipv6_del_addr(ifp); |
1956 | ||
1957 | /* If the last address is deleted administratively, | |
1958 | disable IPv6 on this interface. | |
1959 | */ | |
1960 | if (idev->addr_list == NULL) | |
1961 | addrconf_ifdown(idev->dev, 1); | |
1962 | return 0; | |
1963 | } | |
1964 | } | |
1965 | read_unlock_bh(&idev->lock); | |
1966 | return -EADDRNOTAVAIL; | |
1967 | } | |
1968 | ||
1969 | ||
1970 | int addrconf_add_ifaddr(void __user *arg) | |
1971 | { | |
1972 | struct in6_ifreq ireq; | |
1973 | int err; | |
1ab1457c | 1974 | |
1da177e4 LT |
1975 | if (!capable(CAP_NET_ADMIN)) |
1976 | return -EPERM; | |
1ab1457c | 1977 | |
1da177e4 LT |
1978 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
1979 | return -EFAULT; | |
1980 | ||
1981 | rtnl_lock(); | |
0778769d | 1982 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
55ebaef1 | 1983 | IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1984 | rtnl_unlock(); |
1985 | return err; | |
1986 | } | |
1987 | ||
1988 | int addrconf_del_ifaddr(void __user *arg) | |
1989 | { | |
1990 | struct in6_ifreq ireq; | |
1991 | int err; | |
1ab1457c | 1992 | |
1da177e4 LT |
1993 | if (!capable(CAP_NET_ADMIN)) |
1994 | return -EPERM; | |
1995 | ||
1996 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1997 | return -EFAULT; | |
1998 | ||
1999 | rtnl_lock(); | |
2000 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
2001 | rtnl_unlock(); | |
2002 | return err; | |
2003 | } | |
2004 | ||
0be669bb | 2005 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2006 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2007 | { | |
2008 | struct inet6_ifaddr * ifp; | |
2009 | struct in6_addr addr; | |
2010 | struct net_device *dev; | |
2011 | int scope; | |
2012 | ||
2013 | ASSERT_RTNL(); | |
2014 | ||
2015 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2016 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2017 | ||
2018 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2019 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2020 | scope = IFA_LINK; | |
2021 | } else { | |
2022 | scope = IPV6_ADDR_COMPATv4; | |
2023 | } | |
2024 | ||
2025 | if (addr.s6_addr32[3]) { | |
2026 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2027 | if (!IS_ERR(ifp)) { | |
2028 | spin_lock_bh(&ifp->lock); | |
2029 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2030 | spin_unlock_bh(&ifp->lock); | |
2031 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2032 | in6_ifa_put(ifp); | |
2033 | } | |
2034 | return; | |
2035 | } | |
2036 | ||
1ab1457c | 2037 | for (dev = dev_base; dev != NULL; dev = dev->next) { |
e5ed6399 | 2038 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2039 | if (in_dev && (dev->flags & IFF_UP)) { |
2040 | struct in_ifaddr * ifa; | |
2041 | ||
2042 | int flag = scope; | |
2043 | ||
2044 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2045 | int plen; | |
2046 | ||
2047 | addr.s6_addr32[3] = ifa->ifa_local; | |
2048 | ||
2049 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2050 | continue; | |
2051 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2052 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2053 | continue; | |
2054 | flag |= IFA_HOST; | |
2055 | } | |
2056 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2057 | plen = 64; | |
2058 | else | |
2059 | plen = 96; | |
2060 | ||
2061 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2062 | IFA_F_PERMANENT); | |
2063 | if (!IS_ERR(ifp)) { | |
2064 | spin_lock_bh(&ifp->lock); | |
2065 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2066 | spin_unlock_bh(&ifp->lock); | |
2067 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2068 | in6_ifa_put(ifp); | |
2069 | } | |
2070 | } | |
2071 | } | |
1ab1457c | 2072 | } |
1da177e4 | 2073 | } |
0be669bb | 2074 | #endif |
1da177e4 LT |
2075 | |
2076 | static void init_loopback(struct net_device *dev) | |
2077 | { | |
2078 | struct inet6_dev *idev; | |
2079 | struct inet6_ifaddr * ifp; | |
2080 | ||
2081 | /* ::1 */ | |
2082 | ||
2083 | ASSERT_RTNL(); | |
2084 | ||
2085 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2086 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2091 | if (!IS_ERR(ifp)) { | |
2092 | spin_lock_bh(&ifp->lock); | |
2093 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2094 | spin_unlock_bh(&ifp->lock); | |
2095 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2096 | in6_ifa_put(ifp); | |
2097 | } | |
2098 | } | |
2099 | ||
2100 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2101 | { | |
2102 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2103 | u32 addr_flags = IFA_F_PERMANENT; |
2104 | ||
2105 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2106 | if (idev->cnf.optimistic_dad && | |
2107 | !ipv6_devconf.forwarding) | |
2108 | addr_flags |= IFA_F_OPTIMISTIC; | |
2109 | #endif | |
1da177e4 | 2110 | |
95c385b4 NH |
2111 | |
2112 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2113 | if (!IS_ERR(ifp)) { |
46d48046 | 2114 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2115 | addrconf_dad_start(ifp, 0); |
2116 | in6_ifa_put(ifp); | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | static void addrconf_dev_config(struct net_device *dev) | |
2121 | { | |
2122 | struct in6_addr addr; | |
2123 | struct inet6_dev * idev; | |
2124 | ||
2125 | ASSERT_RTNL(); | |
2126 | ||
1ab1457c | 2127 | if ((dev->type != ARPHRD_ETHER) && |
1da177e4 LT |
2128 | (dev->type != ARPHRD_FDDI) && |
2129 | (dev->type != ARPHRD_IEEE802_TR) && | |
2130 | (dev->type != ARPHRD_ARCNET) && | |
2131 | (dev->type != ARPHRD_INFINIBAND)) { | |
2132 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2133 | return; | |
2134 | } | |
2135 | ||
2136 | idev = addrconf_add_dev(dev); | |
2137 | if (idev == NULL) | |
2138 | return; | |
2139 | ||
2140 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2141 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2142 | ||
2143 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2144 | addrconf_add_linklocal(idev, &addr); | |
2145 | } | |
2146 | ||
0be669bb | 2147 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2148 | static void addrconf_sit_config(struct net_device *dev) |
2149 | { | |
2150 | struct inet6_dev *idev; | |
2151 | ||
2152 | ASSERT_RTNL(); | |
2153 | ||
1ab1457c YH |
2154 | /* |
2155 | * Configure the tunnel with one of our IPv4 | |
2156 | * addresses... we should configure all of | |
1da177e4 LT |
2157 | * our v4 addrs in the tunnel |
2158 | */ | |
2159 | ||
2160 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2161 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2162 | return; | |
2163 | } | |
2164 | ||
2165 | sit_add_v4_addrs(idev); | |
2166 | ||
2167 | if (dev->flags&IFF_POINTOPOINT) { | |
2168 | addrconf_add_mroute(dev); | |
2169 | addrconf_add_lroute(dev); | |
2170 | } else | |
2171 | sit_route_add(dev); | |
2172 | } | |
0be669bb | 2173 | #endif |
1da177e4 LT |
2174 | |
2175 | static inline int | |
2176 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2177 | { | |
2178 | struct in6_addr lladdr; | |
2179 | ||
95c385b4 | 2180 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2181 | addrconf_add_linklocal(idev, &lladdr); |
2182 | return 0; | |
2183 | } | |
2184 | return -1; | |
2185 | } | |
2186 | ||
2187 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2188 | { | |
2189 | struct net_device *link_dev; | |
2190 | ||
2191 | /* first try to inherit the link-local address from the link device */ | |
2192 | if (idev->dev->iflink && | |
2193 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2194 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2195 | return; | |
2196 | } | |
2197 | /* then try to inherit it from any device */ | |
2198 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2199 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2200 | return; | |
2201 | } | |
2202 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2203 | } | |
2204 | ||
2205 | /* | |
2206 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2207 | * DHCPv6, MLD etc. can be run over the virtual link | |
2208 | */ | |
2209 | ||
2210 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2211 | { | |
2212 | struct inet6_dev *idev; | |
2213 | ||
2214 | ASSERT_RTNL(); | |
2215 | ||
2216 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2217 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2218 | return; | |
2219 | } | |
2220 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2221 | } |
2222 | ||
1ab1457c | 2223 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2224 | void * data) |
2225 | { | |
2226 | struct net_device *dev = (struct net_device *) data; | |
2227 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2228 | int run_pending = 0; |
1da177e4 LT |
2229 | |
2230 | switch(event) { | |
45ba9dd2 YH |
2231 | case NETDEV_REGISTER: |
2232 | if (!idev) { | |
2233 | idev = ipv6_add_dev(dev); | |
2234 | if (!idev) | |
2235 | printk(KERN_WARNING "IPv6: add_dev failed for %s\n", | |
2236 | dev->name); | |
2237 | } | |
2238 | break; | |
1da177e4 | 2239 | case NETDEV_UP: |
3c21edbd YH |
2240 | case NETDEV_CHANGE: |
2241 | if (event == NETDEV_UP) { | |
2242 | if (!netif_carrier_ok(dev)) { | |
2243 | /* device is not ready yet. */ | |
2244 | printk(KERN_INFO | |
2245 | "ADDRCONF(NETDEV_UP): %s: " | |
2246 | "link is not ready\n", | |
2247 | dev->name); | |
2248 | break; | |
2249 | } | |
99081049 KS |
2250 | |
2251 | if (idev) | |
2252 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2253 | } else { |
2254 | if (!netif_carrier_ok(dev)) { | |
2255 | /* device is still not ready. */ | |
2256 | break; | |
2257 | } | |
2258 | ||
2259 | if (idev) { | |
2260 | if (idev->if_flags & IF_READY) { | |
2261 | /* device is already configured. */ | |
2262 | break; | |
2263 | } | |
2264 | idev->if_flags |= IF_READY; | |
2265 | } | |
2266 | ||
2267 | printk(KERN_INFO | |
2268 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2269 | "link becomes ready\n", | |
2270 | dev->name); | |
2271 | ||
c5e33bdd | 2272 | run_pending = 1; |
3c21edbd YH |
2273 | } |
2274 | ||
1da177e4 | 2275 | switch(dev->type) { |
0be669bb | 2276 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2277 | case ARPHRD_SIT: |
2278 | addrconf_sit_config(dev); | |
2279 | break; | |
0be669bb | 2280 | #endif |
1da177e4 LT |
2281 | case ARPHRD_TUNNEL6: |
2282 | addrconf_ip6_tnl_config(dev); | |
2283 | break; | |
2284 | case ARPHRD_LOOPBACK: | |
2285 | init_loopback(dev); | |
2286 | break; | |
2287 | ||
2288 | default: | |
2289 | addrconf_dev_config(dev); | |
2290 | break; | |
2291 | }; | |
2292 | if (idev) { | |
c5e33bdd YH |
2293 | if (run_pending) |
2294 | addrconf_dad_run(idev); | |
2295 | ||
1da177e4 LT |
2296 | /* If the MTU changed during the interface down, when the |
2297 | interface up, the changed MTU must be reflected in the | |
2298 | idev as well as routers. | |
2299 | */ | |
2300 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2301 | rt6_mtu_change(dev, dev->mtu); | |
2302 | idev->cnf.mtu6 = dev->mtu; | |
2303 | } | |
2304 | idev->tstamp = jiffies; | |
2305 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2306 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2307 | stop IPv6 on this interface. | |
2308 | */ | |
2309 | if (dev->mtu < IPV6_MIN_MTU) | |
2310 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2311 | } | |
2312 | break; | |
2313 | ||
2314 | case NETDEV_CHANGEMTU: | |
2315 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2316 | rt6_mtu_change(dev, dev->mtu); | |
2317 | idev->cnf.mtu6 = dev->mtu; | |
2318 | break; | |
2319 | } | |
2320 | ||
2321 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2322 | ||
2323 | case NETDEV_DOWN: | |
2324 | case NETDEV_UNREGISTER: | |
2325 | /* | |
2326 | * Remove all addresses from this interface. | |
2327 | */ | |
2328 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2329 | break; | |
3c21edbd | 2330 | |
1da177e4 LT |
2331 | case NETDEV_CHANGENAME: |
2332 | #ifdef CONFIG_SYSCTL | |
2333 | if (idev) { | |
2334 | addrconf_sysctl_unregister(&idev->cnf); | |
2335 | neigh_sysctl_unregister(idev->nd_parms); | |
2336 | neigh_sysctl_register(dev, idev->nd_parms, | |
2337 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2338 | &ndisc_ifinfo_sysctl_change, | |
2339 | NULL); | |
2340 | addrconf_sysctl_register(idev, &idev->cnf); | |
2341 | } | |
2342 | #endif | |
2343 | break; | |
2344 | }; | |
2345 | ||
2346 | return NOTIFY_OK; | |
2347 | } | |
2348 | ||
2349 | /* | |
2350 | * addrconf module should be notified of a device going up | |
2351 | */ | |
2352 | static struct notifier_block ipv6_dev_notf = { | |
2353 | .notifier_call = addrconf_notify, | |
2354 | .priority = 0 | |
2355 | }; | |
2356 | ||
2357 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2358 | { | |
2359 | struct inet6_dev *idev; | |
2360 | struct inet6_ifaddr *ifa, **bifa; | |
2361 | int i; | |
2362 | ||
2363 | ASSERT_RTNL(); | |
2364 | ||
2365 | if (dev == &loopback_dev && how == 1) | |
2366 | how = 0; | |
2367 | ||
2368 | rt6_ifdown(dev); | |
2369 | neigh_ifdown(&nd_tbl, dev); | |
2370 | ||
2371 | idev = __in6_dev_get(dev); | |
2372 | if (idev == NULL) | |
2373 | return -ENODEV; | |
2374 | ||
2375 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2376 | Do not dev_put! |
1da177e4 LT |
2377 | */ |
2378 | if (how == 1) { | |
1da177e4 | 2379 | idev->dead = 1; |
8814c4b5 YH |
2380 | |
2381 | /* protected by rtnl_lock */ | |
2382 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2383 | |
2384 | /* Step 1.5: remove snmp6 entry */ | |
2385 | snmp6_unregister_dev(idev); | |
2386 | ||
2387 | } | |
2388 | ||
2389 | /* Step 2: clear hash table */ | |
2390 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2391 | bifa = &inet6_addr_lst[i]; | |
2392 | ||
2393 | write_lock_bh(&addrconf_hash_lock); | |
2394 | while ((ifa = *bifa) != NULL) { | |
2395 | if (ifa->idev == idev) { | |
2396 | *bifa = ifa->lst_next; | |
2397 | ifa->lst_next = NULL; | |
2398 | addrconf_del_timer(ifa); | |
2399 | in6_ifa_put(ifa); | |
2400 | continue; | |
2401 | } | |
2402 | bifa = &ifa->lst_next; | |
2403 | } | |
2404 | write_unlock_bh(&addrconf_hash_lock); | |
2405 | } | |
2406 | ||
2407 | write_lock_bh(&idev->lock); | |
2408 | ||
2409 | /* Step 3: clear flags for stateless addrconf */ | |
2410 | if (how != 1) | |
3c21edbd | 2411 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2412 | |
2413 | /* Step 4: clear address list */ | |
2414 | #ifdef CONFIG_IPV6_PRIVACY | |
2415 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2416 | in6_dev_put(idev); | |
2417 | ||
2418 | /* clear tempaddr list */ | |
2419 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2420 | idev->tempaddr_list = ifa->tmp_next; | |
2421 | ifa->tmp_next = NULL; | |
2422 | ifa->dead = 1; | |
2423 | write_unlock_bh(&idev->lock); | |
2424 | spin_lock_bh(&ifa->lock); | |
2425 | ||
2426 | if (ifa->ifpub) { | |
2427 | in6_ifa_put(ifa->ifpub); | |
2428 | ifa->ifpub = NULL; | |
2429 | } | |
2430 | spin_unlock_bh(&ifa->lock); | |
2431 | in6_ifa_put(ifa); | |
2432 | write_lock_bh(&idev->lock); | |
2433 | } | |
2434 | #endif | |
2435 | while ((ifa = idev->addr_list) != NULL) { | |
2436 | idev->addr_list = ifa->if_next; | |
2437 | ifa->if_next = NULL; | |
2438 | ifa->dead = 1; | |
2439 | addrconf_del_timer(ifa); | |
2440 | write_unlock_bh(&idev->lock); | |
2441 | ||
2442 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2443 | in6_ifa_put(ifa); | |
2444 | ||
2445 | write_lock_bh(&idev->lock); | |
2446 | } | |
2447 | write_unlock_bh(&idev->lock); | |
2448 | ||
2449 | /* Step 5: Discard multicast list */ | |
2450 | ||
2451 | if (how == 1) | |
2452 | ipv6_mc_destroy_dev(idev); | |
2453 | else | |
2454 | ipv6_mc_down(idev); | |
2455 | ||
2456 | /* Step 5: netlink notification of this interface */ | |
2457 | idev->tstamp = jiffies; | |
979ad663 | 2458 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1ab1457c | 2459 | |
1da177e4 LT |
2460 | /* Shot the device (if unregistered) */ |
2461 | ||
2462 | if (how == 1) { | |
2463 | #ifdef CONFIG_SYSCTL | |
2464 | addrconf_sysctl_unregister(&idev->cnf); | |
2465 | neigh_sysctl_unregister(idev->nd_parms); | |
2466 | #endif | |
2467 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2468 | neigh_ifdown(&nd_tbl, dev); | |
2469 | in6_dev_put(idev); | |
2470 | } | |
2471 | return 0; | |
2472 | } | |
2473 | ||
2474 | static void addrconf_rs_timer(unsigned long data) | |
2475 | { | |
2476 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2477 | ||
2478 | if (ifp->idev->cnf.forwarding) | |
2479 | goto out; | |
2480 | ||
2481 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2482 | /* | |
2483 | * Announcement received after solicitation | |
2484 | * was sent | |
2485 | */ | |
2486 | goto out; | |
2487 | } | |
2488 | ||
2489 | spin_lock(&ifp->lock); | |
2490 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2491 | struct in6_addr all_routers; | |
2492 | ||
2493 | /* The wait after the last probe can be shorter */ | |
2494 | addrconf_mod_timer(ifp, AC_RS, | |
2495 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2496 | ifp->idev->cnf.rtr_solicit_delay : | |
2497 | ifp->idev->cnf.rtr_solicit_interval); | |
2498 | spin_unlock(&ifp->lock); | |
2499 | ||
2500 | ipv6_addr_all_routers(&all_routers); | |
2501 | ||
2502 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2503 | } else { | |
2504 | spin_unlock(&ifp->lock); | |
2505 | /* | |
2506 | * Note: we do not support deprecated "all on-link" | |
2507 | * assumption any longer. | |
2508 | */ | |
2509 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2510 | ifp->idev->dev->name); | |
2511 | } | |
2512 | ||
2513 | out: | |
2514 | in6_ifa_put(ifp); | |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | * Duplicate Address Detection | |
2519 | */ | |
3c21edbd YH |
2520 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2521 | { | |
2522 | unsigned long rand_num; | |
2523 | struct inet6_dev *idev = ifp->idev; | |
2524 | ||
95c385b4 NH |
2525 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2526 | rand_num = 0; | |
2527 | else | |
2528 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2529 | ||
3c21edbd YH |
2530 | ifp->probes = idev->cnf.dad_transmits; |
2531 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2532 | } | |
2533 | ||
e431b8c0 | 2534 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2535 | { |
2536 | struct inet6_dev *idev = ifp->idev; | |
2537 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2538 | |
2539 | addrconf_join_solict(dev, &ifp->addr); | |
2540 | ||
1da177e4 | 2541 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2542 | |
2543 | read_lock_bh(&idev->lock); | |
2544 | if (ifp->dead) | |
2545 | goto out; | |
2546 | spin_lock_bh(&ifp->lock); | |
2547 | ||
2548 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2549 | !(ifp->flags&IFA_F_TENTATIVE) || |
2550 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2551 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2552 | spin_unlock_bh(&ifp->lock); |
2553 | read_unlock_bh(&idev->lock); | |
2554 | ||
2555 | addrconf_dad_completed(ifp); | |
2556 | return; | |
2557 | } | |
2558 | ||
6732bade | 2559 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2560 | spin_unlock_bh(&ifp->lock); |
6732bade | 2561 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2562 | /* |
2563 | * If the defice is not ready: | |
2564 | * - keep it tentative if it is a permanent address. | |
2565 | * - otherwise, kill it. | |
2566 | */ | |
2567 | in6_ifa_hold(ifp); | |
2568 | addrconf_dad_stop(ifp); | |
6732bade | 2569 | return; |
3c21edbd | 2570 | } |
95c385b4 NH |
2571 | |
2572 | /* | |
2573 | * Optimistic nodes can start receiving | |
2574 | * Frames right away | |
2575 | */ | |
2576 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2577 | ip6_ins_rt(ifp->rt); | |
2578 | ||
6732bade YH |
2579 | addrconf_dad_kick(ifp); |
2580 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2581 | out: |
2582 | read_unlock_bh(&idev->lock); | |
2583 | } | |
2584 | ||
2585 | static void addrconf_dad_timer(unsigned long data) | |
2586 | { | |
2587 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2588 | struct inet6_dev *idev = ifp->idev; | |
2589 | struct in6_addr unspec; | |
2590 | struct in6_addr mcaddr; | |
2591 | ||
2592 | read_lock_bh(&idev->lock); | |
2593 | if (idev->dead) { | |
2594 | read_unlock_bh(&idev->lock); | |
2595 | goto out; | |
2596 | } | |
2597 | spin_lock_bh(&ifp->lock); | |
2598 | if (ifp->probes == 0) { | |
2599 | /* | |
2600 | * DAD was successful | |
2601 | */ | |
2602 | ||
95c385b4 | 2603 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2604 | spin_unlock_bh(&ifp->lock); |
2605 | read_unlock_bh(&idev->lock); | |
2606 | ||
2607 | addrconf_dad_completed(ifp); | |
2608 | ||
2609 | goto out; | |
2610 | } | |
2611 | ||
2612 | ifp->probes--; | |
2613 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2614 | spin_unlock_bh(&ifp->lock); | |
2615 | read_unlock_bh(&idev->lock); | |
2616 | ||
2617 | /* send a neighbour solicitation for our addr */ | |
2618 | memset(&unspec, 0, sizeof(unspec)); | |
2619 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2620 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2621 | out: | |
2622 | in6_ifa_put(ifp); | |
2623 | } | |
2624 | ||
2625 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2626 | { | |
2627 | struct net_device * dev = ifp->idev->dev; | |
2628 | ||
2629 | /* | |
2630 | * Configure the address for reception. Now it is valid. | |
2631 | */ | |
2632 | ||
2633 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2634 | ||
2635 | /* If added prefix is link local and forwarding is off, | |
2636 | start sending router solicitations. | |
2637 | */ | |
2638 | ||
2639 | if (ifp->idev->cnf.forwarding == 0 && | |
2640 | ifp->idev->cnf.rtr_solicits > 0 && | |
2641 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2642 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2643 | struct in6_addr all_routers; | |
2644 | ||
2645 | ipv6_addr_all_routers(&all_routers); | |
2646 | ||
2647 | /* | |
2648 | * If a host as already performed a random delay | |
2649 | * [...] as part of DAD [...] there is no need | |
2650 | * to delay again before sending the first RS | |
2651 | */ | |
2652 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2653 | ||
2654 | spin_lock_bh(&ifp->lock); | |
2655 | ifp->probes = 1; | |
2656 | ifp->idev->if_flags |= IF_RS_SENT; | |
2657 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2658 | spin_unlock_bh(&ifp->lock); | |
2659 | } | |
2660 | } | |
2661 | ||
c5e33bdd YH |
2662 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2663 | struct inet6_ifaddr *ifp; | |
2664 | ||
2665 | read_lock_bh(&idev->lock); | |
2666 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2667 | spin_lock_bh(&ifp->lock); | |
2668 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2669 | spin_unlock_bh(&ifp->lock); | |
2670 | continue; | |
2671 | } | |
2672 | spin_unlock_bh(&ifp->lock); | |
2673 | addrconf_dad_kick(ifp); | |
2674 | } | |
2675 | read_unlock_bh(&idev->lock); | |
2676 | } | |
2677 | ||
1da177e4 LT |
2678 | #ifdef CONFIG_PROC_FS |
2679 | struct if6_iter_state { | |
2680 | int bucket; | |
2681 | }; | |
2682 | ||
2683 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2684 | { | |
2685 | struct inet6_ifaddr *ifa = NULL; | |
2686 | struct if6_iter_state *state = seq->private; | |
2687 | ||
2688 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2689 | ifa = inet6_addr_lst[state->bucket]; | |
2690 | if (ifa) | |
2691 | break; | |
2692 | } | |
2693 | return ifa; | |
2694 | } | |
2695 | ||
2696 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2697 | { | |
2698 | struct if6_iter_state *state = seq->private; | |
2699 | ||
2700 | ifa = ifa->lst_next; | |
2701 | try_again: | |
2702 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2703 | ifa = inet6_addr_lst[state->bucket]; | |
2704 | goto try_again; | |
2705 | } | |
2706 | return ifa; | |
2707 | } | |
2708 | ||
2709 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2710 | { | |
2711 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2712 | ||
2713 | if (ifa) | |
2714 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2715 | --pos; | |
2716 | return pos ? NULL : ifa; | |
2717 | } | |
2718 | ||
2719 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2720 | { | |
2721 | read_lock_bh(&addrconf_hash_lock); | |
2722 | return if6_get_idx(seq, *pos); | |
2723 | } | |
2724 | ||
2725 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2726 | { | |
2727 | struct inet6_ifaddr *ifa; | |
2728 | ||
2729 | ifa = if6_get_next(seq, v); | |
2730 | ++*pos; | |
2731 | return ifa; | |
2732 | } | |
2733 | ||
2734 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2735 | { | |
2736 | read_unlock_bh(&addrconf_hash_lock); | |
2737 | } | |
2738 | ||
2739 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2740 | { | |
2741 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2742 | seq_printf(seq, | |
9343e79a | 2743 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2744 | NIP6(ifp->addr), |
2745 | ifp->idev->dev->ifindex, | |
2746 | ifp->prefix_len, | |
2747 | ifp->scope, | |
2748 | ifp->flags, | |
2749 | ifp->idev->dev->name); | |
2750 | return 0; | |
2751 | } | |
2752 | ||
2753 | static struct seq_operations if6_seq_ops = { | |
2754 | .start = if6_seq_start, | |
2755 | .next = if6_seq_next, | |
2756 | .show = if6_seq_show, | |
2757 | .stop = if6_seq_stop, | |
2758 | }; | |
2759 | ||
2760 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2761 | { | |
2762 | struct seq_file *seq; | |
2763 | int rc = -ENOMEM; | |
322f74a4 | 2764 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2765 | |
2766 | if (!s) | |
2767 | goto out; | |
1da177e4 LT |
2768 | |
2769 | rc = seq_open(file, &if6_seq_ops); | |
2770 | if (rc) | |
2771 | goto out_kfree; | |
2772 | ||
2773 | seq = file->private_data; | |
2774 | seq->private = s; | |
2775 | out: | |
2776 | return rc; | |
2777 | out_kfree: | |
2778 | kfree(s); | |
2779 | goto out; | |
2780 | } | |
2781 | ||
9a32144e | 2782 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2783 | .owner = THIS_MODULE, |
2784 | .open = if6_seq_open, | |
2785 | .read = seq_read, | |
2786 | .llseek = seq_lseek, | |
2787 | .release = seq_release_private, | |
2788 | }; | |
2789 | ||
2790 | int __init if6_proc_init(void) | |
2791 | { | |
2792 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2793 | return -ENOMEM; | |
2794 | return 0; | |
2795 | } | |
2796 | ||
2797 | void if6_proc_exit(void) | |
2798 | { | |
2799 | proc_net_remove("if_inet6"); | |
2800 | } | |
2801 | #endif /* CONFIG_PROC_FS */ | |
2802 | ||
3b9f9a1c NT |
2803 | #ifdef CONFIG_IPV6_MIP6 |
2804 | /* Check if address is a home address configured on any interface. */ | |
2805 | int ipv6_chk_home_addr(struct in6_addr *addr) | |
2806 | { | |
2807 | int ret = 0; | |
2808 | struct inet6_ifaddr * ifp; | |
2809 | u8 hash = ipv6_addr_hash(addr); | |
2810 | read_lock_bh(&addrconf_hash_lock); | |
2811 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
2812 | if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && | |
2813 | (ifp->flags & IFA_F_HOMEADDRESS)) { | |
2814 | ret = 1; | |
2815 | break; | |
2816 | } | |
2817 | } | |
2818 | read_unlock_bh(&addrconf_hash_lock); | |
2819 | return ret; | |
2820 | } | |
2821 | #endif | |
2822 | ||
1da177e4 LT |
2823 | /* |
2824 | * Periodic address status verification | |
2825 | */ | |
2826 | ||
2827 | static void addrconf_verify(unsigned long foo) | |
2828 | { | |
2829 | struct inet6_ifaddr *ifp; | |
2830 | unsigned long now, next; | |
2831 | int i; | |
2832 | ||
2833 | spin_lock_bh(&addrconf_verify_lock); | |
2834 | now = jiffies; | |
2835 | next = now + ADDR_CHECK_FREQUENCY; | |
2836 | ||
2837 | del_timer(&addr_chk_timer); | |
2838 | ||
2839 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2840 | ||
2841 | restart: | |
5d5780df | 2842 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2843 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2844 | unsigned long age; | |
2845 | #ifdef CONFIG_IPV6_PRIVACY | |
2846 | unsigned long regen_advance; | |
2847 | #endif | |
2848 | ||
2849 | if (ifp->flags & IFA_F_PERMANENT) | |
2850 | continue; | |
2851 | ||
2852 | spin_lock(&ifp->lock); | |
2853 | age = (now - ifp->tstamp) / HZ; | |
2854 | ||
2855 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
2856 | regen_advance = ifp->idev->cnf.regen_max_retry * |
2857 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
2858 | ifp->idev->nd_parms->retrans_time / HZ; |
2859 | #endif | |
2860 | ||
8f27ebb9 YH |
2861 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2862 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2863 | spin_unlock(&ifp->lock); |
2864 | in6_ifa_hold(ifp); | |
5d5780df | 2865 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2866 | ipv6_del_addr(ifp); |
2867 | goto restart; | |
8f27ebb9 YH |
2868 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2869 | spin_unlock(&ifp->lock); | |
2870 | continue; | |
1da177e4 LT |
2871 | } else if (age >= ifp->prefered_lft) { |
2872 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2873 | int deprecate = 0; | |
2874 | ||
2875 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2876 | deprecate = 1; | |
2877 | ifp->flags |= IFA_F_DEPRECATED; | |
2878 | } | |
2879 | ||
2880 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2881 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2882 | ||
2883 | spin_unlock(&ifp->lock); | |
2884 | ||
2885 | if (deprecate) { | |
2886 | in6_ifa_hold(ifp); | |
5d5780df | 2887 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2888 | |
2889 | ipv6_ifa_notify(0, ifp); | |
2890 | in6_ifa_put(ifp); | |
2891 | goto restart; | |
2892 | } | |
2893 | #ifdef CONFIG_IPV6_PRIVACY | |
2894 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2895 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2896 | if (age >= ifp->prefered_lft - regen_advance) { | |
2897 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2898 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2899 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2900 | if (!ifp->regen_count && ifpub) { | |
2901 | ifp->regen_count++; | |
2902 | in6_ifa_hold(ifp); | |
2903 | in6_ifa_hold(ifpub); | |
2904 | spin_unlock(&ifp->lock); | |
5d5780df | 2905 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2906 | spin_lock(&ifpub->lock); |
2907 | ifpub->regen_count = 0; | |
2908 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2909 | ipv6_create_tempaddr(ifpub, ifp); |
2910 | in6_ifa_put(ifpub); | |
2911 | in6_ifa_put(ifp); | |
2912 | goto restart; | |
2913 | } | |
2914 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2915 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2916 | spin_unlock(&ifp->lock); | |
2917 | #endif | |
2918 | } else { | |
2919 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2920 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2921 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2922 | spin_unlock(&ifp->lock); | |
2923 | } | |
2924 | } | |
5d5780df | 2925 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2926 | } |
2927 | ||
2928 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2929 | add_timer(&addr_chk_timer); | |
2930 | spin_unlock_bh(&addrconf_verify_lock); | |
2931 | } | |
2932 | ||
461d8837 TG |
2933 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
2934 | { | |
2935 | struct in6_addr *pfx = NULL; | |
2936 | ||
2937 | if (addr) | |
2938 | pfx = nla_data(addr); | |
2939 | ||
2940 | if (local) { | |
2941 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
2942 | pfx = NULL; | |
2943 | else | |
2944 | pfx = nla_data(local); | |
2945 | } | |
2946 | ||
2947 | return pfx; | |
2948 | } | |
2949 | ||
2950 | static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = { | |
2951 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, | |
2952 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2953 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
2954 | }; | |
2955 | ||
1da177e4 LT |
2956 | static int |
2957 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2958 | { | |
b933f716 TG |
2959 | struct ifaddrmsg *ifm; |
2960 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 2961 | struct in6_addr *pfx; |
b933f716 | 2962 | int err; |
1da177e4 | 2963 | |
b933f716 TG |
2964 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
2965 | if (err < 0) | |
2966 | return err; | |
2967 | ||
2968 | ifm = nlmsg_data(nlh); | |
2969 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
2970 | if (pfx == NULL) |
2971 | return -EINVAL; | |
2972 | ||
2973 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2974 | } | |
2975 | ||
55ebaef1 NT |
2976 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
2977 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 2978 | { |
46d48046 YH |
2979 | u32 flags = RTF_EXPIRES; |
2980 | ||
081bba5b NT |
2981 | if (!valid_lft || (prefered_lft > valid_lft)) |
2982 | return -EINVAL; | |
2983 | ||
46d48046 | 2984 | if (valid_lft == INFINITY_LIFE_TIME) { |
55ebaef1 | 2985 | ifa_flags |= IFA_F_PERMANENT; |
46d48046 YH |
2986 | flags = 0; |
2987 | } else if (valid_lft >= 0x7FFFFFFF/HZ) | |
081bba5b NT |
2988 | valid_lft = 0x7FFFFFFF/HZ; |
2989 | ||
2990 | if (prefered_lft == 0) | |
55ebaef1 | 2991 | ifa_flags |= IFA_F_DEPRECATED; |
081bba5b NT |
2992 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && |
2993 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2994 | prefered_lft = 0x7FFFFFFF/HZ; | |
2995 | ||
2996 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 2997 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
2998 | ifp->tstamp = jiffies; |
2999 | ifp->valid_lft = valid_lft; | |
3000 | ifp->prefered_lft = prefered_lft; | |
3001 | ||
3002 | spin_unlock_bh(&ifp->lock); | |
3003 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3004 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3005 | |
46d48046 YH |
3006 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
3007 | jiffies_to_clock_t(valid_lft * HZ), flags); | |
081bba5b NT |
3008 | addrconf_verify(0); |
3009 | ||
3010 | return 0; | |
3011 | } | |
3012 | ||
1da177e4 LT |
3013 | static int |
3014 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3015 | { | |
461d8837 TG |
3016 | struct ifaddrmsg *ifm; |
3017 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3018 | struct in6_addr *pfx; |
7198f8ce TG |
3019 | struct inet6_ifaddr *ifa; |
3020 | struct net_device *dev; | |
55ebaef1 NT |
3021 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3022 | u8 ifa_flags; | |
461d8837 | 3023 | int err; |
1da177e4 | 3024 | |
461d8837 TG |
3025 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3026 | if (err < 0) | |
3027 | return err; | |
3028 | ||
3029 | ifm = nlmsg_data(nlh); | |
3030 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3031 | if (pfx == NULL) |
3032 | return -EINVAL; | |
3033 | ||
461d8837 | 3034 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3035 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3036 | |
3037 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3038 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3039 | preferred_lft = ci->ifa_prefered; |
3040 | } else { | |
3041 | preferred_lft = INFINITY_LIFE_TIME; | |
3042 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3043 | } |
3044 | ||
7198f8ce TG |
3045 | dev = __dev_get_by_index(ifm->ifa_index); |
3046 | if (dev == NULL) | |
3047 | return -ENODEV; | |
3048 | ||
55ebaef1 | 3049 | /* We ignore other flags so far. */ |
3b9f9a1c | 3050 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3051 | |
7198f8ce TG |
3052 | ifa = ipv6_get_ifaddr(pfx, dev, 1); |
3053 | if (ifa == NULL) { | |
3054 | /* | |
3055 | * It would be best to check for !NLM_F_CREATE here but | |
3056 | * userspace alreay relies on not having to provide this. | |
3057 | */ | |
3058 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, | |
55ebaef1 | 3059 | ifa_flags, preferred_lft, valid_lft); |
081bba5b NT |
3060 | } |
3061 | ||
7198f8ce TG |
3062 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3063 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3064 | err = -EEXIST; | |
3065 | else | |
55ebaef1 | 3066 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3067 | |
3068 | in6_ifa_put(ifa); | |
3069 | ||
3070 | return err; | |
1da177e4 LT |
3071 | } |
3072 | ||
101bb229 TG |
3073 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3074 | u8 scope, int ifindex) | |
3075 | { | |
3076 | struct ifaddrmsg *ifm; | |
3077 | ||
3078 | ifm = nlmsg_data(nlh); | |
3079 | ifm->ifa_family = AF_INET6; | |
3080 | ifm->ifa_prefixlen = prefixlen; | |
3081 | ifm->ifa_flags = flags; | |
3082 | ifm->ifa_scope = scope; | |
3083 | ifm->ifa_index = ifindex; | |
3084 | } | |
3085 | ||
85486af0 TG |
3086 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3087 | unsigned long tstamp, u32 preferred, u32 valid) | |
3088 | { | |
3089 | struct ifa_cacheinfo ci; | |
3090 | ||
3091 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3092 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3093 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3094 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3095 | ci.ifa_prefered = preferred; | |
3096 | ci.ifa_valid = valid; | |
3097 | ||
3098 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3099 | } | |
3100 | ||
101bb229 TG |
3101 | static inline int rt_scope(int ifa_scope) |
3102 | { | |
3103 | if (ifa_scope & IFA_HOST) | |
3104 | return RT_SCOPE_HOST; | |
3105 | else if (ifa_scope & IFA_LINK) | |
3106 | return RT_SCOPE_LINK; | |
3107 | else if (ifa_scope & IFA_SITE) | |
3108 | return RT_SCOPE_SITE; | |
3109 | else | |
3110 | return RT_SCOPE_UNIVERSE; | |
3111 | } | |
3112 | ||
0ab6803b TG |
3113 | static inline int inet6_ifaddr_msgsize(void) |
3114 | { | |
339bf98f TG |
3115 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3116 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3117 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3118 | } |
c5396a31 | 3119 | |
1da177e4 | 3120 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3121 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3122 | { |
1da177e4 | 3123 | struct nlmsghdr *nlh; |
85486af0 | 3124 | u32 preferred, valid; |
1da177e4 | 3125 | |
0ab6803b TG |
3126 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3127 | if (nlh == NULL) | |
26932566 | 3128 | return -EMSGSIZE; |
0ab6803b | 3129 | |
101bb229 TG |
3130 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3131 | ifa->idev->dev->ifindex); | |
3132 | ||
1da177e4 | 3133 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3134 | preferred = ifa->prefered_lft; |
3135 | valid = ifa->valid_lft; | |
3136 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3137 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3138 | preferred -= tval; |
3139 | if (valid != INFINITY_LIFE_TIME) | |
3140 | valid -= tval; | |
1da177e4 LT |
3141 | } |
3142 | } else { | |
85486af0 TG |
3143 | preferred = INFINITY_LIFE_TIME; |
3144 | valid = INFINITY_LIFE_TIME; | |
3145 | } | |
3146 | ||
0ab6803b | 3147 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3148 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3149 | nlmsg_cancel(skb, nlh); | |
3150 | return -EMSGSIZE; | |
3151 | } | |
1da177e4 | 3152 | |
0ab6803b | 3153 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3154 | } |
3155 | ||
3156 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3157 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3158 | { |
1da177e4 | 3159 | struct nlmsghdr *nlh; |
101bb229 TG |
3160 | u8 scope = RT_SCOPE_UNIVERSE; |
3161 | int ifindex = ifmca->idev->dev->ifindex; | |
3162 | ||
3163 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3164 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3165 | |
0ab6803b TG |
3166 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3167 | if (nlh == NULL) | |
26932566 | 3168 | return -EMSGSIZE; |
85486af0 | 3169 | |
0ab6803b TG |
3170 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3171 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3172 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3173 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3174 | nlmsg_cancel(skb, nlh); | |
3175 | return -EMSGSIZE; | |
3176 | } | |
85486af0 | 3177 | |
0ab6803b | 3178 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3179 | } |
3180 | ||
3181 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3182 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3183 | { |
1da177e4 | 3184 | struct nlmsghdr *nlh; |
101bb229 TG |
3185 | u8 scope = RT_SCOPE_UNIVERSE; |
3186 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3187 | ||
3188 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3189 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3190 | |
0ab6803b TG |
3191 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3192 | if (nlh == NULL) | |
26932566 | 3193 | return -EMSGSIZE; |
85486af0 | 3194 | |
0ab6803b TG |
3195 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3196 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3197 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3198 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3199 | nlmsg_cancel(skb, nlh); | |
3200 | return -EMSGSIZE; | |
3201 | } | |
1da177e4 | 3202 | |
0ab6803b | 3203 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3204 | } |
3205 | ||
3206 | enum addr_type_t | |
3207 | { | |
3208 | UNICAST_ADDR, | |
3209 | MULTICAST_ADDR, | |
3210 | ANYCAST_ADDR, | |
3211 | }; | |
3212 | ||
3213 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3214 | enum addr_type_t type) | |
3215 | { | |
3216 | int idx, ip_idx; | |
3217 | int s_idx, s_ip_idx; | |
3218 | int err = 1; | |
3219 | struct net_device *dev; | |
3220 | struct inet6_dev *idev = NULL; | |
3221 | struct inet6_ifaddr *ifa; | |
3222 | struct ifmcaddr6 *ifmca; | |
3223 | struct ifacaddr6 *ifaca; | |
3224 | ||
3225 | s_idx = cb->args[0]; | |
3226 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3227 | |
1da177e4 LT |
3228 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
3229 | if (idx < s_idx) | |
3230 | continue; | |
3231 | if (idx > s_idx) | |
3232 | s_ip_idx = 0; | |
3233 | ip_idx = 0; | |
3234 | if ((idev = in6_dev_get(dev)) == NULL) | |
3235 | continue; | |
3236 | read_lock_bh(&idev->lock); | |
3237 | switch (type) { | |
3238 | case UNICAST_ADDR: | |
ae9cda5d | 3239 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3240 | for (ifa = idev->addr_list; ifa; |
3241 | ifa = ifa->if_next, ip_idx++) { | |
3242 | if (ip_idx < s_ip_idx) | |
3243 | continue; | |
1ab1457c YH |
3244 | if ((err = inet6_fill_ifaddr(skb, ifa, |
3245 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3246 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3247 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3248 | goto done; |
3249 | } | |
1da177e4 LT |
3250 | break; |
3251 | case MULTICAST_ADDR: | |
3252 | /* multicast address */ | |
1ab1457c | 3253 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3254 | ifmca = ifmca->next, ip_idx++) { |
3255 | if (ip_idx < s_ip_idx) | |
3256 | continue; | |
1ab1457c YH |
3257 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
3258 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3259 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3260 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3261 | goto done; |
3262 | } | |
3263 | break; | |
3264 | case ANYCAST_ADDR: | |
3265 | /* anycast address */ | |
3266 | for (ifaca = idev->ac_list; ifaca; | |
3267 | ifaca = ifaca->aca_next, ip_idx++) { | |
3268 | if (ip_idx < s_ip_idx) | |
3269 | continue; | |
1ab1457c YH |
3270 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
3271 | NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3272 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
1ab1457c | 3273 | NLM_F_MULTI)) <= 0) |
1da177e4 LT |
3274 | goto done; |
3275 | } | |
3276 | break; | |
3277 | default: | |
3278 | break; | |
3279 | } | |
3280 | read_unlock_bh(&idev->lock); | |
3281 | in6_dev_put(idev); | |
3282 | } | |
3283 | done: | |
3284 | if (err <= 0) { | |
3285 | read_unlock_bh(&idev->lock); | |
3286 | in6_dev_put(idev); | |
3287 | } | |
1da177e4 LT |
3288 | cb->args[0] = idx; |
3289 | cb->args[1] = ip_idx; | |
3290 | return skb->len; | |
3291 | } | |
3292 | ||
3293 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3294 | { | |
3295 | enum addr_type_t type = UNICAST_ADDR; | |
3296 | return inet6_dump_addr(skb, cb, type); | |
3297 | } | |
3298 | ||
3299 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3300 | { | |
3301 | enum addr_type_t type = MULTICAST_ADDR; | |
3302 | return inet6_dump_addr(skb, cb, type); | |
3303 | } | |
3304 | ||
3305 | ||
3306 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3307 | { | |
3308 | enum addr_type_t type = ANYCAST_ADDR; | |
3309 | return inet6_dump_addr(skb, cb, type); | |
3310 | } | |
3311 | ||
1b29fc2c TG |
3312 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3313 | void *arg) | |
6c223828 | 3314 | { |
1b29fc2c TG |
3315 | struct ifaddrmsg *ifm; |
3316 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3317 | struct in6_addr *addr = NULL; |
3318 | struct net_device *dev = NULL; | |
3319 | struct inet6_ifaddr *ifa; | |
3320 | struct sk_buff *skb; | |
6c223828 NT |
3321 | int err; |
3322 | ||
1b29fc2c TG |
3323 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3324 | if (err < 0) | |
3325 | goto errout; | |
3326 | ||
3327 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3328 | if (addr == NULL) { | |
3329 | err = -EINVAL; | |
3330 | goto errout; | |
6c223828 | 3331 | } |
6c223828 | 3332 | |
1b29fc2c | 3333 | ifm = nlmsg_data(nlh); |
6c223828 NT |
3334 | if (ifm->ifa_index) |
3335 | dev = __dev_get_by_index(ifm->ifa_index); | |
3336 | ||
1b29fc2c TG |
3337 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { |
3338 | err = -EADDRNOTAVAIL; | |
3339 | goto errout; | |
3340 | } | |
6c223828 | 3341 | |
0ab6803b | 3342 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3343 | err = -ENOBUFS; |
1b29fc2c | 3344 | goto errout_ifa; |
6c223828 NT |
3345 | } |
3346 | ||
6c223828 NT |
3347 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3348 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3349 | if (err < 0) { |
3350 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3351 | WARN_ON(err == -EMSGSIZE); | |
3352 | kfree_skb(skb); | |
3353 | goto errout_ifa; | |
3354 | } | |
2942e900 | 3355 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3356 | errout_ifa: |
6c223828 | 3357 | in6_ifa_put(ifa); |
1b29fc2c | 3358 | errout: |
6c223828 | 3359 | return err; |
6c223828 NT |
3360 | } |
3361 | ||
1da177e4 LT |
3362 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3363 | { | |
3364 | struct sk_buff *skb; | |
5d620266 | 3365 | int err = -ENOBUFS; |
1da177e4 | 3366 | |
0ab6803b | 3367 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3368 | if (skb == NULL) |
3369 | goto errout; | |
3370 | ||
3371 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3372 | if (err < 0) { |
3373 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3374 | WARN_ON(err == -EMSGSIZE); | |
3375 | kfree_skb(skb); | |
3376 | goto errout; | |
3377 | } | |
5d620266 TG |
3378 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3379 | errout: | |
3380 | if (err < 0) | |
3381 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3382 | } |
3383 | ||
b6f99a21 | 3384 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3385 | __s32 *array, int bytes) |
3386 | { | |
04561c1f TG |
3387 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3388 | ||
1da177e4 LT |
3389 | memset(array, 0, bytes); |
3390 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3391 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3392 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3393 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3394 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3395 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3396 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3397 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3398 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3399 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3400 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3401 | #ifdef CONFIG_IPV6_PRIVACY | |
3402 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3403 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3404 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3405 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3406 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3407 | #endif | |
3408 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3409 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3410 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3411 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3412 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3413 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3414 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3415 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3416 | #endif | |
930d6ff2 | 3417 | #endif |
fbea49e1 | 3418 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3419 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3420 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3421 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3422 | #endif | |
1da177e4 LT |
3423 | } |
3424 | ||
339bf98f TG |
3425 | static inline size_t inet6_if_nlmsg_size(void) |
3426 | { | |
3427 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3428 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3429 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3430 | + nla_total_size(4) /* IFLA_MTU */ | |
3431 | + nla_total_size(4) /* IFLA_LINK */ | |
3432 | + nla_total_size( /* IFLA_PROTINFO */ | |
3433 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3434 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3435 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3436 | ); | |
3437 | } | |
c5396a31 | 3438 | |
1ab1457c | 3439 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3440 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3441 | { |
04561c1f TG |
3442 | struct net_device *dev = idev->dev; |
3443 | struct nlattr *conf; | |
3444 | struct ifinfomsg *hdr; | |
3445 | struct nlmsghdr *nlh; | |
3446 | void *protoinfo; | |
3447 | struct ifla_cacheinfo ci; | |
3448 | ||
3449 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3450 | if (nlh == NULL) | |
26932566 | 3451 | return -EMSGSIZE; |
04561c1f TG |
3452 | |
3453 | hdr = nlmsg_data(nlh); | |
3454 | hdr->ifi_family = AF_INET6; | |
3455 | hdr->__ifi_pad = 0; | |
3456 | hdr->ifi_type = dev->type; | |
3457 | hdr->ifi_index = dev->ifindex; | |
3458 | hdr->ifi_flags = dev_get_flags(dev); | |
3459 | hdr->ifi_change = 0; | |
3460 | ||
3461 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3462 | |
3463 | if (dev->addr_len) | |
04561c1f | 3464 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3465 | |
04561c1f | 3466 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3467 | if (dev->ifindex != dev->iflink) |
04561c1f | 3468 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3469 | |
04561c1f TG |
3470 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3471 | if (protoinfo == NULL) | |
3472 | goto nla_put_failure; | |
1da177e4 | 3473 | |
04561c1f | 3474 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3475 | |
1da177e4 LT |
3476 | ci.max_reasm_len = IPV6_MAXPLEN; |
3477 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3478 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3479 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3480 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3481 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3482 | ||
3483 | conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); | |
3484 | if (conf == NULL) | |
3485 | goto nla_put_failure; | |
3486 | ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf)); | |
1da177e4 LT |
3487 | |
3488 | /* XXX - Statistics/MC not implemented */ | |
1da177e4 | 3489 | |
04561c1f TG |
3490 | nla_nest_end(skb, protoinfo); |
3491 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3492 | |
04561c1f | 3493 | nla_put_failure: |
26932566 PM |
3494 | nlmsg_cancel(skb, nlh); |
3495 | return -EMSGSIZE; | |
1da177e4 LT |
3496 | } |
3497 | ||
3498 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3499 | { | |
3500 | int idx, err; | |
3501 | int s_idx = cb->args[0]; | |
3502 | struct net_device *dev; | |
3503 | struct inet6_dev *idev; | |
3504 | ||
3505 | read_lock(&dev_base_lock); | |
3506 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3507 | if (idx < s_idx) | |
3508 | continue; | |
3509 | if ((idev = in6_dev_get(dev)) == NULL) | |
3510 | continue; | |
1ab1457c | 3511 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3512 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3513 | in6_dev_put(idev); |
3514 | if (err <= 0) | |
3515 | break; | |
3516 | } | |
3517 | read_unlock(&dev_base_lock); | |
3518 | cb->args[0] = idx; | |
3519 | ||
3520 | return skb->len; | |
3521 | } | |
3522 | ||
3523 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3524 | { | |
3525 | struct sk_buff *skb; | |
8d7a76c9 | 3526 | int err = -ENOBUFS; |
1ab1457c | 3527 | |
339bf98f | 3528 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3529 | if (skb == NULL) |
3530 | goto errout; | |
3531 | ||
3532 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3533 | if (err < 0) { |
3534 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3535 | WARN_ON(err == -EMSGSIZE); | |
3536 | kfree_skb(skb); | |
3537 | goto errout; | |
3538 | } | |
8d7a76c9 TG |
3539 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3540 | errout: | |
3541 | if (err < 0) | |
3542 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3543 | } |
3544 | ||
339bf98f TG |
3545 | static inline size_t inet6_prefix_nlmsg_size(void) |
3546 | { | |
3547 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3548 | + nla_total_size(sizeof(struct in6_addr)) | |
3549 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3550 | } | |
c5396a31 | 3551 | |
1da177e4 | 3552 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3553 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3554 | int event, unsigned int flags) | |
1da177e4 | 3555 | { |
6051e2f4 TG |
3556 | struct prefixmsg *pmsg; |
3557 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3558 | struct prefix_cacheinfo ci; |
3559 | ||
6051e2f4 TG |
3560 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3561 | if (nlh == NULL) | |
26932566 | 3562 | return -EMSGSIZE; |
6051e2f4 TG |
3563 | |
3564 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3565 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3566 | pmsg->prefix_pad1 = 0; |
3567 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3568 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3569 | pmsg->prefix_len = pinfo->prefix_len; | |
3570 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3571 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3572 | pmsg->prefix_flags = 0; |
3573 | if (pinfo->onlink) | |
3574 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3575 | if (pinfo->autoconf) | |
3576 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3577 | ||
6051e2f4 | 3578 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3579 | |
3580 | ci.preferred_time = ntohl(pinfo->prefered); | |
3581 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3582 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3583 | |
6051e2f4 | 3584 | return nlmsg_end(skb, nlh); |
1da177e4 | 3585 | |
6051e2f4 | 3586 | nla_put_failure: |
26932566 PM |
3587 | nlmsg_cancel(skb, nlh); |
3588 | return -EMSGSIZE; | |
1da177e4 LT |
3589 | } |
3590 | ||
1ab1457c | 3591 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3592 | struct prefix_info *pinfo) |
3593 | { | |
3594 | struct sk_buff *skb; | |
8c384bfa | 3595 | int err = -ENOBUFS; |
1da177e4 | 3596 | |
339bf98f | 3597 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3598 | if (skb == NULL) |
3599 | goto errout; | |
3600 | ||
3601 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3602 | if (err < 0) { |
3603 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3604 | WARN_ON(err == -EMSGSIZE); | |
3605 | kfree_skb(skb); | |
3606 | goto errout; | |
3607 | } | |
8c384bfa TG |
3608 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
3609 | errout: | |
3610 | if (err < 0) | |
3611 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3612 | } |
3613 | ||
1da177e4 LT |
3614 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3615 | { | |
3616 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3617 | ||
3618 | switch (event) { | |
3619 | case RTM_NEWADDR: | |
95c385b4 NH |
3620 | /* |
3621 | * If the address was optimistic | |
3622 | * we inserted the route at the start of | |
3623 | * our DAD process, so we don't need | |
3624 | * to do it again | |
3625 | */ | |
3626 | if (!(ifp->rt->rt6i_node)) | |
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 | }, | |
0bcbc926 YH |
3940 | { |
3941 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
3942 | .procname = "accept_source_route", | |
3943 | .data = &ipv6_devconf.accept_source_route, | |
3944 | .maxlen = sizeof(int), | |
3945 | .mode = 0644, | |
3946 | .proc_handler = &proc_dointvec, | |
3947 | }, | |
95c385b4 NH |
3948 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3949 | { | |
3950 | .ctl_name = CTL_UNNUMBERED, | |
3951 | .procname = "optimistic_dad", | |
3952 | .data = &ipv6_devconf.optimistic_dad, | |
3953 | .maxlen = sizeof(int), | |
3954 | .mode = 0644, | |
3955 | .proc_handler = &proc_dointvec, | |
3956 | ||
3957 | }, | |
3958 | #endif | |
1da177e4 LT |
3959 | { |
3960 | .ctl_name = 0, /* sentinel */ | |
3961 | } | |
3962 | }, | |
3963 | .addrconf_dev = { | |
3964 | { | |
3965 | .ctl_name = NET_PROTO_CONF_ALL, | |
3966 | .procname = "all", | |
3967 | .mode = 0555, | |
3968 | .child = addrconf_sysctl.addrconf_vars, | |
3969 | }, | |
3970 | { | |
3971 | .ctl_name = 0, /* sentinel */ | |
3972 | } | |
3973 | }, | |
3974 | .addrconf_conf_dir = { | |
3975 | { | |
3976 | .ctl_name = NET_IPV6_CONF, | |
3977 | .procname = "conf", | |
3978 | .mode = 0555, | |
3979 | .child = addrconf_sysctl.addrconf_dev, | |
3980 | }, | |
3981 | { | |
3982 | .ctl_name = 0, /* sentinel */ | |
3983 | } | |
3984 | }, | |
3985 | .addrconf_proto_dir = { | |
3986 | { | |
3987 | .ctl_name = NET_IPV6, | |
3988 | .procname = "ipv6", | |
3989 | .mode = 0555, | |
3990 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3991 | }, | |
3992 | { | |
3993 | .ctl_name = 0, /* sentinel */ | |
3994 | } | |
3995 | }, | |
3996 | .addrconf_root_dir = { | |
3997 | { | |
3998 | .ctl_name = CTL_NET, | |
3999 | .procname = "net", | |
4000 | .mode = 0555, | |
4001 | .child = addrconf_sysctl.addrconf_proto_dir, | |
4002 | }, | |
4003 | { | |
4004 | .ctl_name = 0, /* sentinel */ | |
4005 | } | |
4006 | }, | |
4007 | }; | |
4008 | ||
4009 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
4010 | { | |
4011 | int i; | |
4012 | struct net_device *dev = idev ? idev->dev : NULL; | |
4013 | struct addrconf_sysctl_table *t; | |
4014 | char *dev_name = NULL; | |
4015 | ||
af879cc7 | 4016 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
4017 | if (t == NULL) |
4018 | return; | |
1da177e4 LT |
4019 | for (i=0; t->addrconf_vars[i].data; i++) { |
4020 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 LT |
4021 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
4022 | } | |
4023 | if (dev) { | |
1ab1457c | 4024 | dev_name = dev->name; |
1da177e4 LT |
4025 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
4026 | } else { | |
4027 | dev_name = "default"; | |
4028 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
4029 | } | |
4030 | ||
1ab1457c YH |
4031 | /* |
4032 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4033 | * by sysctl and we wouldn't want anyone to change it under our feet |
4034 | * (see SIOCSIFNAME). | |
1ab1457c | 4035 | */ |
543537bd | 4036 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
4037 | if (!dev_name) |
4038 | goto free; | |
4039 | ||
4040 | t->addrconf_dev[0].procname = dev_name; | |
4041 | ||
4042 | t->addrconf_dev[0].child = t->addrconf_vars; | |
1da177e4 | 4043 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
1da177e4 | 4044 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
1da177e4 | 4045 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
1da177e4 | 4046 | |
0b4d4147 | 4047 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); |
1da177e4 LT |
4048 | if (t->sysctl_header == NULL) |
4049 | goto free_procname; | |
4050 | else | |
4051 | p->sysctl = t; | |
4052 | return; | |
4053 | ||
4054 | /* error path */ | |
4055 | free_procname: | |
4056 | kfree(dev_name); | |
4057 | free: | |
4058 | kfree(t); | |
4059 | ||
4060 | return; | |
4061 | } | |
4062 | ||
4063 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
4064 | { | |
4065 | if (p->sysctl) { | |
4066 | struct addrconf_sysctl_table *t = p->sysctl; | |
4067 | p->sysctl = NULL; | |
4068 | unregister_sysctl_table(t->sysctl_header); | |
4069 | kfree(t->addrconf_dev[0].procname); | |
4070 | kfree(t); | |
4071 | } | |
4072 | } | |
4073 | ||
4074 | ||
4075 | #endif | |
4076 | ||
4077 | /* | |
4078 | * Device notifier | |
4079 | */ | |
4080 | ||
4081 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4082 | { | |
1ab1457c | 4083 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4084 | } |
4085 | ||
7159039a YH |
4086 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4087 | ||
1da177e4 LT |
4088 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4089 | { | |
1ab1457c | 4090 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4091 | } |
4092 | ||
7159039a YH |
4093 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4094 | ||
1da177e4 LT |
4095 | /* |
4096 | * Init / cleanup code | |
4097 | */ | |
4098 | ||
4099 | int __init addrconf_init(void) | |
4100 | { | |
4101 | int err = 0; | |
4102 | ||
4103 | /* The addrconf netdev notifier requires that loopback_dev | |
4104 | * has it's ipv6 private information allocated and setup | |
4105 | * before it can bring up and give link-local addresses | |
4106 | * to other devices which are up. | |
4107 | * | |
4108 | * Unfortunately, loopback_dev is not necessarily the first | |
4109 | * entry in the global dev_base list of net devices. In fact, | |
4110 | * it is likely to be the very last entry on that list. | |
4111 | * So this causes the notifier registry below to try and | |
4112 | * give link-local addresses to all devices besides loopback_dev | |
4113 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4114 | * devices to fail to get a link-local address. | |
4115 | * | |
4116 | * So, as a temporary fix, allocate the ipv6 structure for | |
4117 | * loopback_dev first by hand. | |
4118 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4119 | * device and it being up should be removed. | |
4120 | */ | |
4121 | rtnl_lock(); | |
4122 | if (!ipv6_add_dev(&loopback_dev)) | |
4123 | err = -ENOMEM; | |
4124 | rtnl_unlock(); | |
4125 | if (err) | |
4126 | return err; | |
4127 | ||
c62dba90 HX |
4128 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4129 | ||
1da177e4 LT |
4130 | register_netdevice_notifier(&ipv6_dev_notf); |
4131 | ||
1da177e4 | 4132 | addrconf_verify(0); |
c127ea2c TG |
4133 | |
4134 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4135 | if (err < 0) | |
4136 | goto errout; | |
4137 | ||
4138 | /* Only the first call to __rtnl_register can fail */ | |
4139 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4140 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4141 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4142 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4143 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4144 | ||
1da177e4 LT |
4145 | #ifdef CONFIG_SYSCTL |
4146 | addrconf_sysctl.sysctl_header = | |
0b4d4147 | 4147 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir); |
1da177e4 LT |
4148 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
4149 | #endif | |
4150 | ||
4151 | return 0; | |
c127ea2c TG |
4152 | errout: |
4153 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4154 | ||
4155 | return err; | |
1da177e4 LT |
4156 | } |
4157 | ||
4158 | void __exit addrconf_cleanup(void) | |
4159 | { | |
1ab1457c YH |
4160 | struct net_device *dev; |
4161 | struct inet6_dev *idev; | |
4162 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
4163 | int i; |
4164 | ||
4165 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4166 | ||
1da177e4 LT |
4167 | #ifdef CONFIG_SYSCTL |
4168 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4169 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4170 | #endif | |
4171 | ||
4172 | rtnl_lock(); | |
4173 | ||
4174 | /* | |
4175 | * clean dev list. | |
4176 | */ | |
4177 | ||
4178 | for (dev=dev_base; dev; dev=dev->next) { | |
4179 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4180 | continue; | |
4181 | addrconf_ifdown(dev, 1); | |
4182 | } | |
4183 | addrconf_ifdown(&loopback_dev, 2); | |
4184 | ||
4185 | /* | |
4186 | * Check hash table. | |
4187 | */ | |
4188 | ||
4189 | write_lock_bh(&addrconf_hash_lock); | |
4190 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4191 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4192 | struct inet6_ifaddr *bifa; | |
4193 | ||
4194 | bifa = ifa; | |
4195 | ifa = ifa->lst_next; | |
4196 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4197 | /* Do not free it; something is wrong. | |
4198 | Now we can investigate it with debugger. | |
4199 | */ | |
4200 | } | |
4201 | } | |
4202 | write_unlock_bh(&addrconf_hash_lock); | |
4203 | ||
4204 | del_timer(&addr_chk_timer); | |
4205 | ||
4206 | rtnl_unlock(); | |
4207 | ||
1da177e4 LT |
4208 | #ifdef CONFIG_PROC_FS |
4209 | proc_net_remove("if_inet6"); | |
4210 | #endif | |
4211 | } |