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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
1da177e4 LT |
47 | #include <linux/net.h> |
48 | #include <linux/in6.h> | |
49 | #include <linux/netdevice.h> | |
1823730f | 50 | #include <linux/if_addr.h> |
1da177e4 LT |
51 | #include <linux/if_arp.h> |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 | 64 | |
457c4cbc | 65 | #include <net/net_namespace.h> |
1da177e4 LT |
66 | #include <net/sock.h> |
67 | #include <net/snmp.h> | |
68 | ||
69 | #include <net/ipv6.h> | |
70 | #include <net/protocol.h> | |
71 | #include <net/ndisc.h> | |
72 | #include <net/ip6_route.h> | |
73 | #include <net/addrconf.h> | |
74 | #include <net/tcp.h> | |
75 | #include <net/ip.h> | |
5d620266 | 76 | #include <net/netlink.h> |
f24e3d65 | 77 | #include <net/pkt_sched.h> |
1da177e4 LT |
78 | #include <linux/if_tunnel.h> |
79 | #include <linux/rtnetlink.h> | |
80 | ||
81 | #ifdef CONFIG_IPV6_PRIVACY | |
82 | #include <linux/random.h> | |
1da177e4 LT |
83 | #endif |
84 | ||
85 | #include <asm/uaccess.h> | |
7f7d9a6b | 86 | #include <asm/unaligned.h> |
1da177e4 LT |
87 | |
88 | #include <linux/proc_fs.h> | |
89 | #include <linux/seq_file.h> | |
90 | ||
91 | /* Set to 3 to get tracing... */ | |
92 | #define ACONF_DEBUG 2 | |
93 | ||
94 | #if ACONF_DEBUG >= 3 | |
95 | #define ADBG(x) printk x | |
96 | #else | |
97 | #define ADBG(x) | |
98 | #endif | |
99 | ||
100 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
101 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
102 | ||
103 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 104 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
105 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
106 | #else | |
107 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
108 | { | |
109 | } | |
110 | ||
111 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
112 | { | |
113 | } | |
1da177e4 LT |
114 | #endif |
115 | ||
116 | #ifdef CONFIG_IPV6_PRIVACY | |
117 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 118 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 LT |
119 | static void ipv6_regen_rndid(unsigned long data); |
120 | ||
121 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
122 | #endif |
123 | ||
124 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
125 | ||
126 | /* | |
127 | * Configured unicast address hash table | |
128 | */ | |
129 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
130 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
131 | ||
1da177e4 LT |
132 | static void addrconf_verify(unsigned long); |
133 | ||
8d06afab | 134 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
135 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
136 | ||
137 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
138 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
139 | ||
140 | static int addrconf_ifdown(struct net_device *dev, int how); | |
141 | ||
e431b8c0 | 142 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
143 | static void addrconf_dad_timer(unsigned long data); |
144 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 145 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
146 | static void addrconf_rs_timer(unsigned long data); |
147 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
148 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
149 | ||
1ab1457c | 150 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 151 | struct prefix_info *pinfo); |
06bfe655 DL |
152 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
153 | struct net_device *dev); | |
1da177e4 | 154 | |
e041c683 | 155 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 156 | |
ab32ea5d | 157 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
158 | .forwarding = 0, |
159 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
160 | .mtu6 = IPV6_MIN_MTU, | |
161 | .accept_ra = 1, | |
162 | .accept_redirects = 1, | |
163 | .autoconf = 1, | |
164 | .force_mld_version = 0, | |
165 | .dad_transmits = 1, | |
166 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
167 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
168 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
169 | #ifdef CONFIG_IPV6_PRIVACY | |
170 | .use_tempaddr = 0, | |
171 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
172 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
173 | .regen_max_retry = REGEN_MAX_RETRY, | |
174 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
175 | #endif | |
176 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 177 | .accept_ra_defrtr = 1, |
c4fd30eb | 178 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
179 | #ifdef CONFIG_IPV6_ROUTER_PREF |
180 | .accept_ra_rtr_pref = 1, | |
52e16356 | 181 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
182 | #ifdef CONFIG_IPV6_ROUTE_INFO |
183 | .accept_ra_rt_info_max_plen = 0, | |
184 | #endif | |
930d6ff2 | 185 | #endif |
fbea49e1 | 186 | .proxy_ndp = 0, |
0bcbc926 | 187 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
188 | }; |
189 | ||
ab32ea5d | 190 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
191 | .forwarding = 0, |
192 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
193 | .mtu6 = IPV6_MIN_MTU, | |
194 | .accept_ra = 1, | |
195 | .accept_redirects = 1, | |
196 | .autoconf = 1, | |
197 | .dad_transmits = 1, | |
198 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
199 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
200 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
201 | #ifdef CONFIG_IPV6_PRIVACY | |
202 | .use_tempaddr = 0, | |
203 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
204 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
205 | .regen_max_retry = REGEN_MAX_RETRY, | |
206 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
207 | #endif | |
208 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 209 | .accept_ra_defrtr = 1, |
c4fd30eb | 210 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
211 | #ifdef CONFIG_IPV6_ROUTER_PREF |
212 | .accept_ra_rtr_pref = 1, | |
52e16356 | 213 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
214 | #ifdef CONFIG_IPV6_ROUTE_INFO |
215 | .accept_ra_rt_info_max_plen = 0, | |
216 | #endif | |
930d6ff2 | 217 | #endif |
fbea49e1 | 218 | .proxy_ndp = 0, |
0bcbc926 | 219 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
1da177e4 LT |
220 | }; |
221 | ||
222 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 223 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 224 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
225 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
226 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 227 | |
f24e3d65 MC |
228 | /* Check if a valid qdisc is available */ |
229 | static inline int addrconf_qdisc_ok(struct net_device *dev) | |
230 | { | |
231 | return (dev->qdisc != &noop_qdisc); | |
232 | } | |
233 | ||
1da177e4 LT |
234 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
235 | { | |
236 | if (del_timer(&ifp->timer)) | |
237 | __in6_ifa_put(ifp); | |
238 | } | |
239 | ||
240 | enum addrconf_timer_t | |
241 | { | |
242 | AC_NONE, | |
243 | AC_DAD, | |
244 | AC_RS, | |
245 | }; | |
246 | ||
247 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
248 | enum addrconf_timer_t what, | |
249 | unsigned long when) | |
250 | { | |
251 | if (!del_timer(&ifp->timer)) | |
252 | in6_ifa_hold(ifp); | |
253 | ||
254 | switch (what) { | |
255 | case AC_DAD: | |
256 | ifp->timer.function = addrconf_dad_timer; | |
257 | break; | |
258 | case AC_RS: | |
259 | ifp->timer.function = addrconf_rs_timer; | |
260 | break; | |
261 | default:; | |
262 | } | |
263 | ifp->timer.expires = jiffies + when; | |
264 | add_timer(&ifp->timer); | |
265 | } | |
266 | ||
7f7d9a6b HX |
267 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
268 | { | |
7f7d9a6b | 269 | if (snmp_mib_init((void **)idev->stats.ipv6, |
c69bce20 | 270 | sizeof(struct ipstats_mib)) < 0) |
7f7d9a6b HX |
271 | goto err_ip; |
272 | if (snmp_mib_init((void **)idev->stats.icmpv6, | |
c69bce20 | 273 | sizeof(struct icmpv6_mib)) < 0) |
7f7d9a6b | 274 | goto err_icmp; |
14878f75 | 275 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
c69bce20 | 276 | sizeof(struct icmpv6msg_mib)) < 0) |
14878f75 | 277 | goto err_icmpmsg; |
7f7d9a6b HX |
278 | |
279 | return 0; | |
280 | ||
14878f75 DS |
281 | err_icmpmsg: |
282 | snmp_mib_free((void **)idev->stats.icmpv6); | |
7f7d9a6b HX |
283 | err_icmp: |
284 | snmp_mib_free((void **)idev->stats.ipv6); | |
285 | err_ip: | |
aaf70ec7 | 286 | return -ENOMEM; |
7f7d9a6b HX |
287 | } |
288 | ||
16910b98 | 289 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 290 | { |
14878f75 | 291 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
7f7d9a6b HX |
292 | snmp_mib_free((void **)idev->stats.icmpv6); |
293 | snmp_mib_free((void **)idev->stats.ipv6); | |
7f7d9a6b HX |
294 | } |
295 | ||
1da177e4 LT |
296 | /* Nobody refers to this device, we may destroy it. */ |
297 | ||
8814c4b5 YH |
298 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
299 | { | |
300 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
301 | kfree(idev); | |
302 | } | |
303 | ||
1da177e4 LT |
304 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
305 | { | |
306 | struct net_device *dev = idev->dev; | |
307 | BUG_TRAP(idev->addr_list==NULL); | |
308 | BUG_TRAP(idev->mc_list==NULL); | |
309 | #ifdef NET_REFCNT_DEBUG | |
310 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
311 | #endif | |
312 | dev_put(dev); | |
313 | if (!idev->dead) { | |
314 | printk("Freeing alive inet6 device %p\n", idev); | |
315 | return; | |
316 | } | |
317 | snmp6_free_dev(idev); | |
8814c4b5 | 318 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
1da177e4 LT |
319 | } |
320 | ||
7159039a YH |
321 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
322 | ||
1da177e4 LT |
323 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
324 | { | |
325 | struct inet6_dev *ndev; | |
326 | ||
327 | ASSERT_RTNL(); | |
328 | ||
329 | if (dev->mtu < IPV6_MIN_MTU) | |
330 | return NULL; | |
331 | ||
1ab1457c | 332 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 333 | |
1ab1457c YH |
334 | if (ndev == NULL) |
335 | return NULL; | |
322f74a4 IO |
336 | |
337 | rwlock_init(&ndev->lock); | |
338 | ndev->dev = dev; | |
c346dca1 | 339 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
340 | ndev->cnf.mtu6 = dev->mtu; |
341 | ndev->cnf.sysctl = NULL; | |
342 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
343 | if (ndev->nd_parms == NULL) { | |
344 | kfree(ndev); | |
345 | return NULL; | |
346 | } | |
347 | /* We refer to the device */ | |
348 | dev_hold(dev); | |
1da177e4 | 349 | |
322f74a4 IO |
350 | if (snmp6_alloc_dev(ndev) < 0) { |
351 | ADBG((KERN_WARNING | |
352 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
0dc47877 | 353 | __func__, dev->name)); |
322f74a4 IO |
354 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
355 | ndev->dead = 1; | |
356 | in6_dev_finish_destroy(ndev); | |
357 | return NULL; | |
358 | } | |
1da177e4 | 359 | |
322f74a4 IO |
360 | if (snmp6_register_dev(ndev) < 0) { |
361 | ADBG((KERN_WARNING | |
362 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
0dc47877 | 363 | __func__, dev->name)); |
322f74a4 IO |
364 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
365 | ndev->dead = 1; | |
366 | in6_dev_finish_destroy(ndev); | |
367 | return NULL; | |
368 | } | |
369 | ||
370 | /* One reference from device. We must do this before | |
371 | * we invoke __ipv6_regen_rndid(). | |
372 | */ | |
373 | in6_dev_hold(ndev); | |
1da177e4 | 374 | |
b077d7ab YH |
375 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
376 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
377 | printk(KERN_INFO | |
378 | "%s: Disabled Multicast RS\n", | |
379 | dev->name); | |
380 | ndev->cnf.rtr_solicits = 0; | |
381 | } | |
382 | #endif | |
383 | ||
1da177e4 | 384 | #ifdef CONFIG_IPV6_PRIVACY |
b24b8a24 | 385 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
386 | if ((dev->flags&IFF_LOOPBACK) || |
387 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 388 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 389 | dev->type == ARPHRD_SIT || |
0be669bb | 390 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
391 | printk(KERN_INFO |
392 | "%s: Disabled Privacy Extensions\n", | |
393 | dev->name); | |
394 | ndev->cnf.use_tempaddr = -1; | |
395 | } else { | |
396 | in6_dev_hold(ndev); | |
397 | ipv6_regen_rndid((unsigned long) ndev); | |
398 | } | |
1da177e4 LT |
399 | #endif |
400 | ||
f24e3d65 | 401 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
402 | ndev->if_flags |= IF_READY; |
403 | ||
322f74a4 IO |
404 | ipv6_mc_init_dev(ndev); |
405 | ndev->tstamp = jiffies; | |
f52295a9 | 406 | addrconf_sysctl_register(ndev); |
30c4cf57 DS |
407 | /* protected by rtnl_lock */ |
408 | rcu_assign_pointer(dev->ip6_ptr, ndev); | |
d88ae4cc YH |
409 | |
410 | /* Join all-node multicast group */ | |
f3ee4010 | 411 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 412 | |
1da177e4 LT |
413 | return ndev; |
414 | } | |
415 | ||
cee89473 | 416 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
417 | { |
418 | struct inet6_dev *idev; | |
419 | ||
420 | ASSERT_RTNL(); | |
421 | ||
422 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
423 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
424 | return NULL; | |
425 | } | |
c5e33bdd | 426 | |
1da177e4 LT |
427 | if (dev->flags&IFF_UP) |
428 | ipv6_mc_up(idev); | |
429 | return idev; | |
430 | } | |
431 | ||
432 | #ifdef CONFIG_SYSCTL | |
433 | static void dev_forward_change(struct inet6_dev *idev) | |
434 | { | |
435 | struct net_device *dev; | |
436 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
437 | |
438 | if (!idev) | |
439 | return; | |
440 | dev = idev->dev; | |
441 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
1da177e4 | 442 | if (idev->cnf.forwarding) |
f3ee4010 | 443 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 444 | else |
f3ee4010 | 445 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 LT |
446 | } |
447 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
2c12a74c MW |
448 | if (ifa->flags&IFA_F_TENTATIVE) |
449 | continue; | |
1da177e4 LT |
450 | if (idev->cnf.forwarding) |
451 | addrconf_join_anycast(ifa); | |
452 | else | |
453 | addrconf_leave_anycast(ifa); | |
454 | } | |
455 | } | |
456 | ||
457 | ||
e186932b | 458 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
459 | { |
460 | struct net_device *dev; | |
461 | struct inet6_dev *idev; | |
462 | ||
463 | read_lock(&dev_base_lock); | |
bff16c2f | 464 | for_each_netdev(net, dev) { |
8814c4b5 | 465 | rcu_read_lock(); |
1da177e4 LT |
466 | idev = __in6_dev_get(dev); |
467 | if (idev) { | |
e186932b PE |
468 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
469 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
470 | if (changed) |
471 | dev_forward_change(idev); | |
472 | } | |
8814c4b5 | 473 | rcu_read_unlock(); |
1da177e4 LT |
474 | } |
475 | read_unlock(&dev_base_lock); | |
476 | } | |
c8fecf22 PE |
477 | |
478 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) | |
479 | { | |
bff16c2f PE |
480 | struct net *net; |
481 | ||
482 | net = (struct net *)table->extra2; | |
441fc2a2 | 483 | if (p == &net->ipv6.devconf_dflt->forwarding) |
c8fecf22 PE |
484 | return; |
485 | ||
e186932b PE |
486 | if (p == &net->ipv6.devconf_all->forwarding) { |
487 | __s32 newf = net->ipv6.devconf_all->forwarding; | |
488 | net->ipv6.devconf_dflt->forwarding = newf; | |
489 | addrconf_forward_change(net, newf); | |
c8fecf22 PE |
490 | } else if ((!*p) ^ (!old)) |
491 | dev_forward_change((struct inet6_dev *)table->extra1); | |
492 | ||
493 | if (*p) | |
7b4da532 | 494 | rt6_purge_dflt_routers(net); |
c8fecf22 | 495 | } |
1da177e4 LT |
496 | #endif |
497 | ||
498 | /* Nobody refers to this ifaddr, destroy it */ | |
499 | ||
500 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
501 | { | |
502 | BUG_TRAP(ifp->if_next==NULL); | |
503 | BUG_TRAP(ifp->lst_next==NULL); | |
504 | #ifdef NET_REFCNT_DEBUG | |
505 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
506 | #endif | |
507 | ||
508 | in6_dev_put(ifp->idev); | |
509 | ||
510 | if (del_timer(&ifp->timer)) | |
511 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
512 | ||
513 | if (!ifp->dead) { | |
514 | printk("Freeing alive inet6 address %p\n", ifp); | |
515 | return; | |
516 | } | |
517 | dst_release(&ifp->rt->u.dst); | |
518 | ||
519 | kfree(ifp); | |
520 | } | |
521 | ||
e55ffac6 BH |
522 | static void |
523 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
524 | { | |
525 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 526 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
527 | |
528 | /* | |
529 | * Each device address list is sorted in order of scope - | |
530 | * global before linklocal. | |
531 | */ | |
532 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
533 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 534 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
535 | break; |
536 | } | |
537 | ||
538 | ifp->if_next = *ifap; | |
539 | *ifap = ifp; | |
540 | } | |
541 | ||
3eb84f49 YH |
542 | /* |
543 | * Hash function taken from net_alias.c | |
544 | */ | |
545 | static u8 ipv6_addr_hash(const struct in6_addr *addr) | |
546 | { | |
547 | __u32 word; | |
548 | ||
549 | /* | |
550 | * We perform the hash function over the last 64 bits of the address | |
551 | * This will include the IEEE address token on links that support it. | |
552 | */ | |
553 | ||
554 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); | |
555 | word ^= (word >> 16); | |
556 | word ^= (word >> 8); | |
557 | ||
558 | return ((word ^ (word >> 4)) & 0x0f); | |
559 | } | |
560 | ||
1da177e4 LT |
561 | /* On success it returns ifp with increased reference count */ |
562 | ||
563 | static struct inet6_ifaddr * | |
564 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 565 | int scope, u32 flags) |
1da177e4 LT |
566 | { |
567 | struct inet6_ifaddr *ifa = NULL; | |
568 | struct rt6_info *rt; | |
569 | int hash; | |
570 | int err = 0; | |
571 | ||
8814c4b5 | 572 | rcu_read_lock_bh(); |
1da177e4 LT |
573 | if (idev->dead) { |
574 | err = -ENODEV; /*XXX*/ | |
575 | goto out2; | |
576 | } | |
577 | ||
578 | write_lock(&addrconf_hash_lock); | |
579 | ||
580 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 581 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
582 | ADBG(("ipv6_add_addr: already assigned\n")); |
583 | err = -EEXIST; | |
584 | goto out; | |
585 | } | |
586 | ||
322f74a4 | 587 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
588 | |
589 | if (ifa == NULL) { | |
590 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
591 | err = -ENOBUFS; | |
592 | goto out; | |
593 | } | |
594 | ||
595 | rt = addrconf_dst_alloc(idev, addr, 0); | |
596 | if (IS_ERR(rt)) { | |
597 | err = PTR_ERR(rt); | |
598 | goto out; | |
599 | } | |
600 | ||
1da177e4 LT |
601 | ipv6_addr_copy(&ifa->addr, addr); |
602 | ||
603 | spin_lock_init(&ifa->lock); | |
604 | init_timer(&ifa->timer); | |
605 | ifa->timer.data = (unsigned long) ifa; | |
606 | ifa->scope = scope; | |
607 | ifa->prefix_len = pfxlen; | |
608 | ifa->flags = flags | IFA_F_TENTATIVE; | |
609 | ifa->cstamp = ifa->tstamp = jiffies; | |
610 | ||
57f5f544 KF |
611 | ifa->rt = rt; |
612 | ||
95c385b4 NH |
613 | /* |
614 | * part one of RFC 4429, section 3.3 | |
615 | * We should not configure an address as | |
616 | * optimistic if we do not yet know the link | |
617 | * layer address of our nexhop router | |
618 | */ | |
619 | ||
620 | if (rt->rt6i_nexthop == NULL) | |
621 | ifa->flags &= ~IFA_F_OPTIMISTIC; | |
622 | ||
1da177e4 LT |
623 | ifa->idev = idev; |
624 | in6_dev_hold(idev); | |
625 | /* For caller */ | |
626 | in6_ifa_hold(ifa); | |
627 | ||
628 | /* Add to big hash table */ | |
629 | hash = ipv6_addr_hash(addr); | |
630 | ||
631 | ifa->lst_next = inet6_addr_lst[hash]; | |
632 | inet6_addr_lst[hash] = ifa; | |
633 | in6_ifa_hold(ifa); | |
634 | write_unlock(&addrconf_hash_lock); | |
635 | ||
636 | write_lock(&idev->lock); | |
637 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 638 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
639 | |
640 | #ifdef CONFIG_IPV6_PRIVACY | |
641 | if (ifa->flags&IFA_F_TEMPORARY) { | |
642 | ifa->tmp_next = idev->tempaddr_list; | |
643 | idev->tempaddr_list = ifa; | |
644 | in6_ifa_hold(ifa); | |
645 | } | |
646 | #endif | |
647 | ||
1da177e4 LT |
648 | in6_ifa_hold(ifa); |
649 | write_unlock(&idev->lock); | |
650 | out2: | |
8814c4b5 | 651 | rcu_read_unlock_bh(); |
1da177e4 | 652 | |
fd92833a | 653 | if (likely(err == 0)) |
e041c683 | 654 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
655 | else { |
656 | kfree(ifa); | |
657 | ifa = ERR_PTR(err); | |
658 | } | |
659 | ||
660 | return ifa; | |
661 | out: | |
662 | write_unlock(&addrconf_hash_lock); | |
663 | goto out2; | |
664 | } | |
665 | ||
666 | /* This function wants to get referenced ifp and releases it before return */ | |
667 | ||
668 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
669 | { | |
670 | struct inet6_ifaddr *ifa, **ifap; | |
671 | struct inet6_dev *idev = ifp->idev; | |
672 | int hash; | |
673 | int deleted = 0, onlink = 0; | |
674 | unsigned long expires = jiffies; | |
675 | ||
676 | hash = ipv6_addr_hash(&ifp->addr); | |
677 | ||
678 | ifp->dead = 1; | |
679 | ||
680 | write_lock_bh(&addrconf_hash_lock); | |
681 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
682 | ifap = &ifa->lst_next) { | |
683 | if (ifa == ifp) { | |
684 | *ifap = ifa->lst_next; | |
685 | __in6_ifa_put(ifp); | |
686 | ifa->lst_next = NULL; | |
687 | break; | |
688 | } | |
689 | } | |
690 | write_unlock_bh(&addrconf_hash_lock); | |
691 | ||
692 | write_lock_bh(&idev->lock); | |
693 | #ifdef CONFIG_IPV6_PRIVACY | |
694 | if (ifp->flags&IFA_F_TEMPORARY) { | |
695 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
696 | ifap = &ifa->tmp_next) { | |
697 | if (ifa == ifp) { | |
698 | *ifap = ifa->tmp_next; | |
699 | if (ifp->ifpub) { | |
700 | in6_ifa_put(ifp->ifpub); | |
701 | ifp->ifpub = NULL; | |
702 | } | |
703 | __in6_ifa_put(ifp); | |
704 | ifa->tmp_next = NULL; | |
705 | break; | |
706 | } | |
707 | } | |
708 | } | |
709 | #endif | |
710 | ||
1d142804 | 711 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
712 | if (ifa == ifp) { |
713 | *ifap = ifa->if_next; | |
714 | __in6_ifa_put(ifp); | |
715 | ifa->if_next = NULL; | |
716 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
717 | break; | |
718 | deleted = 1; | |
1d142804 | 719 | continue; |
1da177e4 LT |
720 | } else if (ifp->flags & IFA_F_PERMANENT) { |
721 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
722 | ifp->prefix_len)) { | |
723 | if (ifa->flags & IFA_F_PERMANENT) { | |
724 | onlink = 1; | |
725 | if (deleted) | |
726 | break; | |
727 | } else { | |
728 | unsigned long lifetime; | |
729 | ||
730 | if (!onlink) | |
731 | onlink = -1; | |
732 | ||
733 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
734 | |
735 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
736 | /* | |
737 | * Note: Because this address is | |
738 | * not permanent, lifetime < | |
739 | * LONG_MAX / HZ here. | |
740 | */ | |
1da177e4 LT |
741 | if (time_before(expires, |
742 | ifa->tstamp + lifetime * HZ)) | |
743 | expires = ifa->tstamp + lifetime * HZ; | |
744 | spin_unlock(&ifa->lock); | |
745 | } | |
746 | } | |
747 | } | |
1d142804 | 748 | ifap = &ifa->if_next; |
1da177e4 LT |
749 | } |
750 | write_unlock_bh(&idev->lock); | |
751 | ||
b2238566 AV |
752 | addrconf_del_timer(ifp); |
753 | ||
1da177e4 LT |
754 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
755 | ||
e041c683 | 756 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 757 | |
1da177e4 LT |
758 | /* |
759 | * Purge or update corresponding prefix | |
760 | * | |
761 | * 1) we don't purge prefix here if address was not permanent. | |
762 | * prefix is managed by its own lifetime. | |
763 | * 2) if there're no addresses, delete prefix. | |
764 | * 3) if there're still other permanent address(es), | |
765 | * corresponding prefix is still permanent. | |
766 | * 4) otherwise, update prefix lifetime to the | |
767 | * longest valid lifetime among the corresponding | |
768 | * addresses on the device. | |
769 | * Note: subsequent RA will update lifetime. | |
770 | * | |
771 | * --yoshfuji | |
772 | */ | |
773 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
774 | struct in6_addr prefix; | |
775 | struct rt6_info *rt; | |
c346dca1 | 776 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 777 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 778 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 LT |
779 | |
780 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
781 | if (onlink == 0) { | |
e0a1ad73 | 782 | ip6_del_rt(rt); |
1da177e4 LT |
783 | rt = NULL; |
784 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
785 | rt->rt6i_expires = expires; | |
786 | rt->rt6i_flags |= RTF_EXPIRES; | |
787 | } | |
788 | } | |
789 | dst_release(&rt->u.dst); | |
790 | } | |
791 | ||
792 | in6_ifa_put(ifp); | |
793 | } | |
794 | ||
795 | #ifdef CONFIG_IPV6_PRIVACY | |
796 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
797 | { | |
798 | struct inet6_dev *idev = ifp->idev; | |
799 | struct in6_addr addr, *tmpaddr; | |
800 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
eac55bf9 | 801 | unsigned long regen_advance; |
1da177e4 LT |
802 | int tmp_plen; |
803 | int ret = 0; | |
804 | int max_addresses; | |
95c385b4 | 805 | u32 addr_flags; |
1da177e4 LT |
806 | |
807 | write_lock(&idev->lock); | |
808 | if (ift) { | |
809 | spin_lock_bh(&ift->lock); | |
810 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
811 | spin_unlock_bh(&ift->lock); | |
812 | tmpaddr = &addr; | |
813 | } else { | |
814 | tmpaddr = NULL; | |
815 | } | |
816 | retry: | |
817 | in6_dev_hold(idev); | |
818 | if (idev->cnf.use_tempaddr <= 0) { | |
819 | write_unlock(&idev->lock); | |
820 | printk(KERN_INFO | |
821 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
822 | in6_dev_put(idev); | |
823 | ret = -1; | |
824 | goto out; | |
825 | } | |
826 | spin_lock_bh(&ifp->lock); | |
827 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
828 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
829 | spin_unlock_bh(&ifp->lock); | |
830 | write_unlock(&idev->lock); | |
831 | printk(KERN_WARNING | |
832 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
833 | in6_dev_put(idev); | |
834 | ret = -1; | |
835 | goto out; | |
836 | } | |
837 | in6_ifa_hold(ifp); | |
838 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
839 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
840 | spin_unlock_bh(&ifp->lock); | |
841 | write_unlock(&idev->lock); | |
842 | printk(KERN_WARNING | |
843 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
844 | in6_ifa_put(ifp); | |
845 | in6_dev_put(idev); | |
846 | ret = -1; | |
847 | goto out; | |
848 | } | |
849 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
850 | tmp_valid_lft = min_t(__u32, | |
851 | ifp->valid_lft, | |
852 | idev->cnf.temp_valid_lft); | |
1ab1457c YH |
853 | tmp_prefered_lft = min_t(__u32, |
854 | ifp->prefered_lft, | |
1da177e4 LT |
855 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
856 | tmp_plen = ifp->prefix_len; | |
857 | max_addresses = idev->cnf.max_addresses; | |
858 | tmp_cstamp = ifp->cstamp; | |
859 | tmp_tstamp = ifp->tstamp; | |
860 | spin_unlock_bh(&ifp->lock); | |
861 | ||
eac55bf9 BB |
862 | regen_advance = idev->cnf.regen_max_retry * |
863 | idev->cnf.dad_transmits * | |
864 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 865 | write_unlock(&idev->lock); |
95c385b4 | 866 | |
eac55bf9 BB |
867 | /* A temporary address is created only if this calculated Preferred |
868 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
869 | * an implementation must not create a temporary address with a zero | |
870 | * Preferred Lifetime. | |
871 | */ | |
872 | if (tmp_prefered_lft <= regen_advance) { | |
873 | in6_ifa_put(ifp); | |
874 | in6_dev_put(idev); | |
875 | ret = -1; | |
876 | goto out; | |
877 | } | |
878 | ||
95c385b4 NH |
879 | addr_flags = IFA_F_TEMPORARY; |
880 | /* set in addrconf_prefix_rcv() */ | |
881 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
882 | addr_flags |= IFA_F_OPTIMISTIC; | |
883 | ||
1da177e4 | 884 | ift = !max_addresses || |
1ab1457c | 885 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 886 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
887 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
888 | addr_flags) : NULL; | |
1da177e4 LT |
889 | if (!ift || IS_ERR(ift)) { |
890 | in6_ifa_put(ifp); | |
891 | in6_dev_put(idev); | |
892 | printk(KERN_INFO | |
893 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
894 | tmpaddr = &addr; | |
895 | write_lock(&idev->lock); | |
896 | goto retry; | |
897 | } | |
898 | ||
899 | spin_lock_bh(&ift->lock); | |
900 | ift->ifpub = ifp; | |
901 | ift->valid_lft = tmp_valid_lft; | |
902 | ift->prefered_lft = tmp_prefered_lft; | |
903 | ift->cstamp = tmp_cstamp; | |
904 | ift->tstamp = tmp_tstamp; | |
905 | spin_unlock_bh(&ift->lock); | |
906 | ||
907 | addrconf_dad_start(ift, 0); | |
908 | in6_ifa_put(ift); | |
909 | in6_dev_put(idev); | |
910 | out: | |
911 | return ret; | |
912 | } | |
913 | #endif | |
914 | ||
915 | /* | |
072047e4 | 916 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 917 | */ |
a9b05723 YH |
918 | enum { |
919 | IPV6_SADDR_RULE_INIT = 0, | |
920 | IPV6_SADDR_RULE_LOCAL, | |
921 | IPV6_SADDR_RULE_SCOPE, | |
922 | IPV6_SADDR_RULE_PREFERRED, | |
923 | #ifdef CONFIG_IPV6_MIP6 | |
924 | IPV6_SADDR_RULE_HOA, | |
925 | #endif | |
926 | IPV6_SADDR_RULE_OIF, | |
927 | IPV6_SADDR_RULE_LABEL, | |
928 | #ifdef CONFIG_IPV6_PRIVACY | |
929 | IPV6_SADDR_RULE_PRIVACY, | |
930 | #endif | |
931 | IPV6_SADDR_RULE_ORCHID, | |
932 | IPV6_SADDR_RULE_PREFIX, | |
933 | IPV6_SADDR_RULE_MAX | |
934 | }; | |
935 | ||
072047e4 | 936 | struct ipv6_saddr_score { |
a9b05723 YH |
937 | int rule; |
938 | int addr_type; | |
939 | struct inet6_ifaddr *ifa; | |
940 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
941 | int scopedist; | |
942 | int matchlen; | |
072047e4 YH |
943 | }; |
944 | ||
a9b05723 | 945 | struct ipv6_saddr_dst { |
9acd9f3a | 946 | const struct in6_addr *addr; |
a9b05723 YH |
947 | int ifindex; |
948 | int scope; | |
949 | int label; | |
7cbca67c | 950 | unsigned int prefs; |
a9b05723 | 951 | }; |
072047e4 | 952 | |
b6f99a21 | 953 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 954 | { |
072047e4 YH |
955 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
956 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
957 | return 1; | |
958 | return 0; | |
1da177e4 LT |
959 | } |
960 | ||
a9b05723 YH |
961 | static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score, |
962 | struct ipv6_saddr_dst *dst, | |
963 | int i) | |
964 | { | |
965 | int ret; | |
966 | ||
967 | if (i <= score->rule) { | |
968 | switch (i) { | |
969 | case IPV6_SADDR_RULE_SCOPE: | |
970 | ret = score->scopedist; | |
971 | break; | |
972 | case IPV6_SADDR_RULE_PREFIX: | |
973 | ret = score->matchlen; | |
974 | break; | |
975 | default: | |
976 | ret = !!test_bit(i, score->scorebits); | |
977 | } | |
978 | goto out; | |
979 | } | |
980 | ||
981 | switch (i) { | |
982 | case IPV6_SADDR_RULE_INIT: | |
983 | /* Rule 0: remember if hiscore is not ready yet */ | |
984 | ret = !!score->ifa; | |
985 | break; | |
986 | case IPV6_SADDR_RULE_LOCAL: | |
987 | /* Rule 1: Prefer same address */ | |
988 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
989 | break; | |
990 | case IPV6_SADDR_RULE_SCOPE: | |
991 | /* Rule 2: Prefer appropriate scope | |
992 | * | |
993 | * ret | |
994 | * ^ | |
995 | * -1 | d 15 | |
996 | * ---+--+-+---> scope | |
997 | * | | |
998 | * | d is scope of the destination. | |
999 | * B-d | \ | |
1000 | * | \ <- smaller scope is better if | |
1001 | * B-15 | \ if scope is enough for destinaion. | |
1002 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1003 | * d-C-1 | / | |
1004 | * |/ <- greater is better | |
1005 | * -C / if scope is not enough for destination. | |
1006 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1007 | * | |
1008 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1009 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1010 | * Assume B = 0 and we get C > 29. | |
1011 | */ | |
1012 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1013 | if (ret >= dst->scope) | |
1014 | ret = -ret; | |
1015 | else | |
1016 | ret -= 128; /* 30 is enough */ | |
1017 | score->scopedist = ret; | |
1018 | break; | |
1019 | case IPV6_SADDR_RULE_PREFERRED: | |
1020 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1021 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1022 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1023 | break; | |
1024 | #ifdef CONFIG_IPV6_MIP6 | |
1025 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1026 | { |
a9b05723 | 1027 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1028 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1029 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1030 | break; |
7cbca67c | 1031 | } |
a9b05723 YH |
1032 | #endif |
1033 | case IPV6_SADDR_RULE_OIF: | |
1034 | /* Rule 5: Prefer outgoing interface */ | |
1035 | ret = (!dst->ifindex || | |
1036 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1037 | break; | |
1038 | case IPV6_SADDR_RULE_LABEL: | |
1039 | /* Rule 6: Prefer matching label */ | |
1040 | ret = ipv6_addr_label(&score->ifa->addr, score->addr_type, | |
1041 | score->ifa->idev->dev->ifindex) == dst->label; | |
1042 | break; | |
1043 | #ifdef CONFIG_IPV6_PRIVACY | |
1044 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1045 | { |
a9b05723 YH |
1046 | /* Rule 7: Prefer public address |
1047 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1048 | */ | |
7cbca67c YH |
1049 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1050 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1051 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1052 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1053 | break; |
7cbca67c | 1054 | } |
a9b05723 YH |
1055 | #endif |
1056 | case IPV6_SADDR_RULE_ORCHID: | |
1057 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1058 | * non-ORCHID vs non-ORCHID | |
1059 | */ | |
1060 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1061 | ipv6_addr_orchid(dst->addr)); | |
1062 | break; | |
1063 | case IPV6_SADDR_RULE_PREFIX: | |
1064 | /* Rule 8: Use longest matching prefix */ | |
1065 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1066 | dst->addr); | |
1067 | break; | |
1068 | default: | |
1069 | ret = 0; | |
1070 | } | |
1071 | ||
1072 | if (ret) | |
1073 | __set_bit(i, score->scorebits); | |
1074 | score->rule = i; | |
1075 | out: | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | int ipv6_dev_get_saddr(struct net_device *dst_dev, | |
9acd9f3a | 1080 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1081 | struct in6_addr *saddr) |
1da177e4 | 1082 | { |
a9b05723 YH |
1083 | struct ipv6_saddr_score scores[2], |
1084 | *score = &scores[0], *hiscore = &scores[1]; | |
c346dca1 | 1085 | struct net *net = dev_net(dst_dev); |
a9b05723 | 1086 | struct ipv6_saddr_dst dst; |
072047e4 | 1087 | struct net_device *dev; |
a9b05723 | 1088 | int dst_type; |
1da177e4 | 1089 | |
a9b05723 YH |
1090 | dst_type = __ipv6_addr_type(daddr); |
1091 | dst.addr = daddr; | |
1092 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1093 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
1094 | dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex); | |
7cbca67c | 1095 | dst.prefs = prefs; |
a9b05723 YH |
1096 | |
1097 | hiscore->rule = -1; | |
1098 | hiscore->ifa = NULL; | |
1da177e4 | 1099 | |
072047e4 | 1100 | read_lock(&dev_base_lock); |
8814c4b5 | 1101 | rcu_read_lock(); |
1da177e4 | 1102 | |
6fda7350 | 1103 | for_each_netdev(net, dev) { |
072047e4 | 1104 | struct inet6_dev *idev; |
072047e4 | 1105 | |
a9b05723 | 1106 | /* Candidate Source Address (section 4) |
072047e4 YH |
1107 | * - multicast and link-local destination address, |
1108 | * the set of candidate source address MUST only | |
1109 | * include addresses assigned to interfaces | |
1110 | * belonging to the same link as the outgoing | |
1111 | * interface. | |
1112 | * (- For site-local destination addresses, the | |
1113 | * set of candidate source addresses MUST only | |
1114 | * include addresses assigned to interfaces | |
1115 | * belonging to the same site as the outgoing | |
1116 | * interface.) | |
1117 | */ | |
a9b05723 YH |
1118 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1119 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1120 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1121 | continue; |
1da177e4 | 1122 | |
1da177e4 | 1123 | idev = __in6_dev_get(dev); |
072047e4 YH |
1124 | if (!idev) |
1125 | continue; | |
1126 | ||
1127 | read_lock_bh(&idev->lock); | |
a9b05723 YH |
1128 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
1129 | int i; | |
072047e4 | 1130 | |
a9b05723 | 1131 | /* |
6b3ae80a YH |
1132 | * - Tentative Address (RFC2462 section 5.4) |
1133 | * - A tentative address is not considered | |
1134 | * "assigned to an interface" in the traditional | |
95c385b4 | 1135 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1136 | * - Candidate Source Address (section 4) |
072047e4 YH |
1137 | * - In any case, anycast addresses, multicast |
1138 | * addresses, and the unspecified address MUST | |
1139 | * NOT be included in a candidate set. | |
1140 | */ | |
a9b05723 YH |
1141 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1142 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1143 | continue; |
a9b05723 YH |
1144 | |
1145 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1146 | ||
1147 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1148 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1149 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1150 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1151 | "assigned as unicast address on %s", |
1152 | dev->name); | |
1153 | continue; | |
1154 | } | |
1155 | ||
a9b05723 YH |
1156 | score->rule = -1; |
1157 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1158 | ||
1159 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1160 | int minihiscore, miniscore; | |
1161 | ||
1162 | minihiscore = ipv6_get_saddr_eval(hiscore, &dst, i); | |
1163 | miniscore = ipv6_get_saddr_eval(score, &dst, i); | |
1164 | ||
1165 | if (minihiscore > miniscore) { | |
1166 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1167 | score->scopedist > 0) { | |
1168 | /* | |
1169 | * special case: | |
1170 | * each remaining entry | |
1171 | * has too small (not enough) | |
1172 | * scope, because ifa entries | |
1173 | * are sorted by their scope | |
1174 | * values. | |
1175 | */ | |
1176 | goto try_nextdev; | |
1177 | } | |
1178 | break; | |
1179 | } else if (minihiscore < miniscore) { | |
1180 | struct ipv6_saddr_score *tmp; | |
1181 | ||
1182 | if (hiscore->ifa) | |
1183 | in6_ifa_put(hiscore->ifa); | |
1184 | ||
1185 | in6_ifa_hold(score->ifa); | |
1186 | ||
1187 | tmp = hiscore; | |
1188 | hiscore = score; | |
1189 | score = tmp; | |
1190 | ||
1191 | /* restore our iterator */ | |
1192 | score->ifa = hiscore->ifa; | |
1193 | ||
1194 | break; | |
1da177e4 | 1195 | } |
072047e4 | 1196 | } |
1da177e4 | 1197 | } |
a9b05723 | 1198 | try_nextdev: |
072047e4 | 1199 | read_unlock_bh(&idev->lock); |
1da177e4 | 1200 | } |
8814c4b5 | 1201 | rcu_read_unlock(); |
1da177e4 LT |
1202 | read_unlock(&dev_base_lock); |
1203 | ||
a9b05723 | 1204 | if (!hiscore->ifa) |
072047e4 | 1205 | return -EADDRNOTAVAIL; |
1ab1457c | 1206 | |
a9b05723 YH |
1207 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
1208 | in6_ifa_put(hiscore->ifa); | |
072047e4 | 1209 | return 0; |
1da177e4 LT |
1210 | } |
1211 | ||
5e5f3f0f | 1212 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1213 | |
95c385b4 NH |
1214 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1215 | unsigned char banned_flags) | |
1da177e4 LT |
1216 | { |
1217 | struct inet6_dev *idev; | |
1218 | int err = -EADDRNOTAVAIL; | |
1219 | ||
8814c4b5 | 1220 | rcu_read_lock(); |
1da177e4 LT |
1221 | if ((idev = __in6_dev_get(dev)) != NULL) { |
1222 | struct inet6_ifaddr *ifp; | |
1223 | ||
1224 | read_lock_bh(&idev->lock); | |
1225 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
95c385b4 | 1226 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
1da177e4 LT |
1227 | ipv6_addr_copy(addr, &ifp->addr); |
1228 | err = 0; | |
1229 | break; | |
1230 | } | |
1231 | } | |
1232 | read_unlock_bh(&idev->lock); | |
1233 | } | |
8814c4b5 | 1234 | rcu_read_unlock(); |
1da177e4 LT |
1235 | return err; |
1236 | } | |
1237 | ||
1238 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1239 | { | |
1240 | int cnt = 0; | |
1241 | struct inet6_ifaddr *ifp; | |
1242 | ||
1243 | read_lock_bh(&idev->lock); | |
1244 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1245 | cnt++; | |
1246 | read_unlock_bh(&idev->lock); | |
1247 | return cnt; | |
1248 | } | |
1249 | ||
bfeade08 DL |
1250 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
1251 | struct net_device *dev, int strict) | |
1da177e4 LT |
1252 | { |
1253 | struct inet6_ifaddr * ifp; | |
1254 | u8 hash = ipv6_addr_hash(addr); | |
1255 | ||
1256 | read_lock_bh(&addrconf_hash_lock); | |
1257 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1258 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1259 | continue; |
1da177e4 LT |
1260 | if (ipv6_addr_equal(&ifp->addr, addr) && |
1261 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1262 | if (dev == NULL || ifp->idev->dev == dev || | |
1263 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | read_unlock_bh(&addrconf_hash_lock); | |
1268 | return ifp != NULL; | |
1269 | } | |
7159039a YH |
1270 | EXPORT_SYMBOL(ipv6_chk_addr); |
1271 | ||
1da177e4 | 1272 | static |
06bfe655 DL |
1273 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1274 | struct net_device *dev) | |
1da177e4 LT |
1275 | { |
1276 | struct inet6_ifaddr * ifp; | |
1277 | u8 hash = ipv6_addr_hash(addr); | |
1278 | ||
1279 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1280 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1281 | continue; |
1da177e4 LT |
1282 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1283 | if (dev == NULL || ifp->idev->dev == dev) | |
1284 | break; | |
1285 | } | |
1286 | } | |
1287 | return ifp != NULL; | |
1288 | } | |
1289 | ||
52eeeb84 YH |
1290 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
1291 | { | |
1292 | struct inet6_dev *idev; | |
1293 | struct inet6_ifaddr *ifa; | |
1294 | int onlink; | |
1295 | ||
1296 | onlink = 0; | |
1297 | rcu_read_lock(); | |
1298 | idev = __in6_dev_get(dev); | |
1299 | if (idev) { | |
1300 | read_lock_bh(&idev->lock); | |
1301 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
1302 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
1303 | ifa->prefix_len); | |
1304 | if (onlink) | |
1305 | break; | |
1306 | } | |
1307 | read_unlock_bh(&idev->lock); | |
1308 | } | |
1309 | rcu_read_unlock(); | |
1310 | return onlink; | |
1311 | } | |
1312 | ||
1313 | EXPORT_SYMBOL(ipv6_chk_prefix); | |
1314 | ||
9acd9f3a | 1315 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1316 | struct net_device *dev, int strict) |
1da177e4 LT |
1317 | { |
1318 | struct inet6_ifaddr * ifp; | |
1319 | u8 hash = ipv6_addr_hash(addr); | |
1320 | ||
1321 | read_lock_bh(&addrconf_hash_lock); | |
1322 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
878628fb | 1323 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1324 | continue; |
1da177e4 LT |
1325 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1326 | if (dev == NULL || ifp->idev->dev == dev || | |
1327 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1328 | in6_ifa_hold(ifp); | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | } | |
1333 | read_unlock_bh(&addrconf_hash_lock); | |
1334 | ||
1335 | return ifp; | |
1336 | } | |
1337 | ||
1338 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1339 | { | |
1340 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1341 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82103232 AV |
1342 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
1343 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); | |
1da177e4 | 1344 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1345 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1346 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1347 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1348 | ||
1349 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1350 | return 1; | |
1351 | ||
1352 | if (addr_type2 == IPV6_ADDR_ANY && | |
1353 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1354 | return 1; | |
1355 | ||
1356 | if (addr_type == IPV6_ADDR_ANY && | |
1357 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1358 | return 1; | |
1359 | ||
1360 | if (sk2_rcv_saddr6 && | |
1361 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1362 | return 1; | |
1363 | ||
1364 | if (addr_type == IPV6_ADDR_MAPPED && | |
1365 | !sk2_ipv6only && | |
1366 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1367 | return 1; | |
1368 | ||
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | /* Gets referenced address, destroys ifaddr */ | |
1373 | ||
9f5336e2 | 1374 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1375 | { |
1da177e4 LT |
1376 | if (ifp->flags&IFA_F_PERMANENT) { |
1377 | spin_lock_bh(&ifp->lock); | |
1378 | addrconf_del_timer(ifp); | |
1379 | ifp->flags |= IFA_F_TENTATIVE; | |
1380 | spin_unlock_bh(&ifp->lock); | |
1381 | in6_ifa_put(ifp); | |
1382 | #ifdef CONFIG_IPV6_PRIVACY | |
1383 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1384 | struct inet6_ifaddr *ifpub; | |
1385 | spin_lock_bh(&ifp->lock); | |
1386 | ifpub = ifp->ifpub; | |
1387 | if (ifpub) { | |
1388 | in6_ifa_hold(ifpub); | |
1389 | spin_unlock_bh(&ifp->lock); | |
1390 | ipv6_create_tempaddr(ifpub, ifp); | |
1391 | in6_ifa_put(ifpub); | |
1392 | } else { | |
1393 | spin_unlock_bh(&ifp->lock); | |
1394 | } | |
1395 | ipv6_del_addr(ifp); | |
1396 | #endif | |
1397 | } else | |
1398 | ipv6_del_addr(ifp); | |
1399 | } | |
1400 | ||
3c21edbd YH |
1401 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1402 | { | |
1403 | if (net_ratelimit()) | |
1404 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1405 | addrconf_dad_stop(ifp); | |
1406 | } | |
1da177e4 LT |
1407 | |
1408 | /* Join to solicited addr multicast group. */ | |
1409 | ||
1410 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1411 | { | |
1412 | struct in6_addr maddr; | |
1413 | ||
1414 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1415 | return; | |
1416 | ||
1417 | addrconf_addr_solict_mult(addr, &maddr); | |
1418 | ipv6_dev_mc_inc(dev, &maddr); | |
1419 | } | |
1420 | ||
1421 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1422 | { | |
1423 | struct in6_addr maddr; | |
1424 | ||
1425 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1426 | return; | |
1427 | ||
1428 | addrconf_addr_solict_mult(addr, &maddr); | |
1429 | __ipv6_dev_mc_dec(idev, &maddr); | |
1430 | } | |
1431 | ||
20380731 | 1432 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1433 | { |
1434 | struct in6_addr addr; | |
1435 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1436 | if (ipv6_addr_any(&addr)) | |
1437 | return; | |
1438 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1439 | } | |
1440 | ||
20380731 | 1441 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1442 | { |
1443 | struct in6_addr addr; | |
1444 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1445 | if (ipv6_addr_any(&addr)) | |
1446 | return; | |
1447 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1448 | } | |
1449 | ||
073a8e0e YH |
1450 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1451 | { | |
1452 | if (dev->addr_len != ETH_ALEN) | |
1453 | return -1; | |
1454 | memcpy(eui, dev->dev_addr, 3); | |
1455 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1456 | ||
1457 | /* | |
1458 | * The zSeries OSA network cards can be shared among various | |
1459 | * OS instances, but the OSA cards have only one MAC address. | |
1460 | * This leads to duplicate address conflicts in conjunction | |
1461 | * with IPv6 if more than one instance uses the same card. | |
1462 | * | |
1463 | * The driver for these cards can deliver a unique 16-bit | |
1464 | * identifier for each instance sharing the same card. It is | |
1465 | * placed instead of 0xFFFE in the interface identifier. The | |
1466 | * "u" bit of the interface identifier is not inverted in this | |
1467 | * case. Hence the resulting interface identifier has local | |
1468 | * scope according to RFC2373. | |
1469 | */ | |
1470 | if (dev->dev_id) { | |
1471 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1472 | eui[4] = dev->dev_id & 0xFF; | |
1473 | } else { | |
1474 | eui[3] = 0xFF; | |
1475 | eui[4] = 0xFE; | |
1476 | eui[0] ^= 2; | |
1477 | } | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1482 | { | |
1483 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1484 | if (dev->addr_len != ARCNET_ALEN) | |
1485 | return -1; | |
1486 | memset(eui, 0, 7); | |
1487 | eui[7] = *(u8*)dev->dev_addr; | |
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1492 | { | |
1493 | if (dev->addr_len != INFINIBAND_ALEN) | |
1494 | return -1; | |
1495 | memcpy(eui, dev->dev_addr + 12, 8); | |
1496 | eui[0] |= 2; | |
1497 | return 0; | |
1498 | } | |
1499 | ||
dfd982ba YH |
1500 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
1501 | { | |
1502 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || | |
1503 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1504 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1505 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1506 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1507 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1508 | eui[1] = 0; | |
1509 | eui[2] = 0x5E; | |
1510 | eui[3] = 0xFE; | |
1511 | memcpy(eui + 4, &addr, 4); | |
1512 | return 0; | |
1513 | } | |
1514 | EXPORT_SYMBOL(__ipv6_isatap_ifid); | |
1515 | ||
1516 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1517 | { | |
1518 | if (dev->priv_flags & IFF_ISATAP) | |
1519 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1520 | return -1; | |
1521 | } | |
1522 | ||
1da177e4 LT |
1523 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1524 | { | |
1525 | switch (dev->type) { | |
1526 | case ARPHRD_ETHER: | |
1527 | case ARPHRD_FDDI: | |
1528 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1529 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1530 | case ARPHRD_ARCNET: |
073a8e0e | 1531 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1532 | case ARPHRD_INFINIBAND: |
073a8e0e | 1533 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1534 | case ARPHRD_SIT: |
dfd982ba | 1535 | return addrconf_ifid_sit(eui, dev); |
1da177e4 LT |
1536 | } |
1537 | return -1; | |
1538 | } | |
1539 | ||
1540 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1541 | { | |
1542 | int err = -1; | |
1543 | struct inet6_ifaddr *ifp; | |
1544 | ||
1545 | read_lock_bh(&idev->lock); | |
1546 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1547 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1548 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1549 | err = 0; | |
1550 | break; | |
1551 | } | |
1552 | } | |
1553 | read_unlock_bh(&idev->lock); | |
1554 | return err; | |
1555 | } | |
1556 | ||
1557 | #ifdef CONFIG_IPV6_PRIVACY | |
1558 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1559 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1560 | { | |
1da177e4 | 1561 | regen: |
955189ef | 1562 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1563 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1564 | |
1565 | /* | |
1566 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1567 | * check if generated address is not inappropriate | |
1568 | * | |
1569 | * - Reserved subnet anycast (RFC 2526) | |
1570 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1571 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1572 | * 00-00-5E-FE-xx-xx-xx-xx |
1573 | * - value 0 | |
1574 | * - XXX: already assigned to an address on the device | |
1575 | */ | |
1ab1457c | 1576 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1577 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1578 | (idev->rndid[7]&0x80)) | |
1579 | goto regen; | |
1580 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1581 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1582 | goto regen; | |
1583 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1584 | goto regen; | |
1585 | } | |
1586 | ||
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | static void ipv6_regen_rndid(unsigned long data) | |
1591 | { | |
1592 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1593 | unsigned long expires; | |
1594 | ||
8814c4b5 | 1595 | rcu_read_lock_bh(); |
1da177e4 LT |
1596 | write_lock_bh(&idev->lock); |
1597 | ||
1598 | if (idev->dead) | |
1599 | goto out; | |
1600 | ||
1601 | if (__ipv6_regen_rndid(idev) < 0) | |
1602 | goto out; | |
1ab1457c | 1603 | |
1da177e4 | 1604 | expires = jiffies + |
1ab1457c | 1605 | idev->cnf.temp_prefered_lft * HZ - |
1da177e4 LT |
1606 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
1607 | if (time_before(expires, jiffies)) { | |
1608 | printk(KERN_WARNING | |
1609 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1610 | idev->dev->name); | |
1611 | goto out; | |
1612 | } | |
1613 | ||
1614 | if (!mod_timer(&idev->regen_timer, expires)) | |
1615 | in6_dev_hold(idev); | |
1616 | ||
1617 | out: | |
1618 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1619 | rcu_read_unlock_bh(); |
1da177e4 LT |
1620 | in6_dev_put(idev); |
1621 | } | |
1622 | ||
1623 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1624 | int ret = 0; | |
1625 | ||
1626 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1627 | ret = __ipv6_regen_rndid(idev); | |
1628 | return ret; | |
1629 | } | |
1630 | #endif | |
1631 | ||
1632 | /* | |
1633 | * Add prefix route. | |
1634 | */ | |
1635 | ||
1636 | static void | |
1637 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1638 | unsigned long expires, u32 flags) |
1da177e4 | 1639 | { |
86872cb5 TG |
1640 | struct fib6_config cfg = { |
1641 | .fc_table = RT6_TABLE_PREFIX, | |
1642 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1643 | .fc_ifindex = dev->ifindex, | |
1644 | .fc_expires = expires, | |
1645 | .fc_dst_len = plen, | |
1646 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1647 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1648 | }; |
1da177e4 | 1649 | |
86872cb5 | 1650 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
1da177e4 LT |
1651 | |
1652 | /* Prevent useless cloning on PtP SIT. | |
1653 | This thing is done here expecting that the whole | |
1654 | class of non-broadcast devices need not cloning. | |
1655 | */ | |
0be669bb | 1656 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1657 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1658 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1659 | #endif |
1da177e4 | 1660 | |
86872cb5 | 1661 | ip6_route_add(&cfg); |
1da177e4 LT |
1662 | } |
1663 | ||
1664 | /* Create "default" multicast route to the interface */ | |
1665 | ||
1666 | static void addrconf_add_mroute(struct net_device *dev) | |
1667 | { | |
86872cb5 TG |
1668 | struct fib6_config cfg = { |
1669 | .fc_table = RT6_TABLE_LOCAL, | |
1670 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1671 | .fc_ifindex = dev->ifindex, | |
1672 | .fc_dst_len = 8, | |
1673 | .fc_flags = RTF_UP, | |
c346dca1 | 1674 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1675 | }; |
1676 | ||
1677 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1678 | ||
1679 | ip6_route_add(&cfg); | |
1da177e4 LT |
1680 | } |
1681 | ||
0be669bb | 1682 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1683 | static void sit_route_add(struct net_device *dev) |
1684 | { | |
86872cb5 TG |
1685 | struct fib6_config cfg = { |
1686 | .fc_table = RT6_TABLE_MAIN, | |
1687 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1688 | .fc_ifindex = dev->ifindex, | |
1689 | .fc_dst_len = 96, | |
1690 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1691 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1692 | }; |
1da177e4 LT |
1693 | |
1694 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1695 | ip6_route_add(&cfg); |
1da177e4 | 1696 | } |
0be669bb | 1697 | #endif |
1da177e4 LT |
1698 | |
1699 | static void addrconf_add_lroute(struct net_device *dev) | |
1700 | { | |
1701 | struct in6_addr addr; | |
1702 | ||
1703 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1704 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1705 | } | |
1706 | ||
1707 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1708 | { | |
1709 | struct inet6_dev *idev; | |
1710 | ||
1711 | ASSERT_RTNL(); | |
1712 | ||
1713 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1714 | return NULL; | |
1715 | ||
1716 | /* Add default multicast route */ | |
1717 | addrconf_add_mroute(dev); | |
1718 | ||
1719 | /* Add link local route */ | |
1720 | addrconf_add_lroute(dev); | |
1721 | return idev; | |
1722 | } | |
1723 | ||
1724 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1725 | { | |
1726 | struct prefix_info *pinfo; | |
1727 | __u32 valid_lft; | |
1728 | __u32 prefered_lft; | |
1729 | int addr_type; | |
1da177e4 LT |
1730 | struct inet6_dev *in6_dev; |
1731 | ||
1732 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1733 | |
1da177e4 LT |
1734 | if (len < sizeof(struct prefix_info)) { |
1735 | ADBG(("addrconf: prefix option too short\n")); | |
1736 | return; | |
1737 | } | |
1ab1457c | 1738 | |
1da177e4 LT |
1739 | /* |
1740 | * Validation checks ([ADDRCONF], page 19) | |
1741 | */ | |
1742 | ||
1743 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1744 | ||
1745 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1746 | return; | |
1747 | ||
1748 | valid_lft = ntohl(pinfo->valid); | |
1749 | prefered_lft = ntohl(pinfo->prefered); | |
1750 | ||
1751 | if (prefered_lft > valid_lft) { | |
1752 | if (net_ratelimit()) | |
1753 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1754 | return; | |
1755 | } | |
1756 | ||
1757 | in6_dev = in6_dev_get(dev); | |
1758 | ||
1759 | if (in6_dev == NULL) { | |
1760 | if (net_ratelimit()) | |
1761 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1762 | return; | |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * Two things going on here: | |
1767 | * 1) Add routes for on-link prefixes | |
1768 | * 2) Configure prefixes with the auto flag set | |
1769 | */ | |
1770 | ||
4bed72e4 YH |
1771 | if (pinfo->onlink) { |
1772 | struct rt6_info *rt; | |
1773 | unsigned long rt_expires; | |
1774 | ||
6f704992 YH |
1775 | /* Avoid arithmetic overflow. Really, we could |
1776 | * save rt_expires in seconds, likely valid_lft, | |
1777 | * but it would require division in fib gc, that it | |
1778 | * not good. | |
1779 | */ | |
4bed72e4 YH |
1780 | if (HZ > USER_HZ) |
1781 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1782 | else | |
1783 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1784 | |
4bed72e4 YH |
1785 | if (addrconf_finite_timeout(rt_expires)) |
1786 | rt_expires *= HZ; | |
1da177e4 | 1787 | |
c346dca1 | 1788 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
6fda7350 | 1789 | dev->ifindex, 1); |
1da177e4 LT |
1790 | |
1791 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
6f704992 YH |
1792 | /* Autoconf prefix route */ |
1793 | if (valid_lft == 0) { | |
1794 | ip6_del_rt(rt); | |
1795 | rt = NULL; | |
4bed72e4 | 1796 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 YH |
1797 | /* not infinity */ |
1798 | rt->rt6i_expires = jiffies + rt_expires; | |
1799 | rt->rt6i_flags |= RTF_EXPIRES; | |
1800 | } else { | |
1801 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
1802 | rt->rt6i_expires = 0; | |
1da177e4 LT |
1803 | } |
1804 | } else if (valid_lft) { | |
6f704992 | 1805 | clock_t expires = 0; |
4bed72e4 YH |
1806 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1807 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1808 | /* not infinity */ |
1809 | flags |= RTF_EXPIRES; | |
1810 | expires = jiffies_to_clock_t(rt_expires); | |
1811 | } | |
1da177e4 | 1812 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1813 | dev, expires, flags); |
1da177e4 LT |
1814 | } |
1815 | if (rt) | |
1816 | dst_release(&rt->u.dst); | |
1817 | } | |
1818 | ||
1819 | /* Try to figure out our local address for this prefix */ | |
1820 | ||
1821 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1822 | struct inet6_ifaddr * ifp; | |
1823 | struct in6_addr addr; | |
1824 | int create = 0, update_lft = 0; | |
1825 | ||
1826 | if (pinfo->prefix_len == 64) { | |
1827 | memcpy(&addr, &pinfo->prefix, 8); | |
1828 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1829 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1830 | in6_dev_put(in6_dev); | |
1831 | return; | |
1832 | } | |
1833 | goto ok; | |
1834 | } | |
1835 | if (net_ratelimit()) | |
1836 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1837 | pinfo->prefix_len); | |
1838 | in6_dev_put(in6_dev); | |
1839 | return; | |
1840 | ||
1841 | ok: | |
1842 | ||
c346dca1 | 1843 | ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1); |
1da177e4 LT |
1844 | |
1845 | if (ifp == NULL && valid_lft) { | |
1846 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1847 | u32 addr_flags = 0; |
1848 | ||
1849 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1850 | if (in6_dev->cnf.optimistic_dad && | |
1851 | !ipv6_devconf.forwarding) | |
1852 | addr_flags = IFA_F_OPTIMISTIC; | |
1853 | #endif | |
1da177e4 LT |
1854 | |
1855 | /* Do not allow to create too much of autoconfigured | |
1856 | * addresses; this would be too easy way to crash kernel. | |
1857 | */ | |
1858 | if (!max_addresses || | |
1859 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1860 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1861 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1862 | addr_flags); | |
1da177e4 LT |
1863 | |
1864 | if (!ifp || IS_ERR(ifp)) { | |
1865 | in6_dev_put(in6_dev); | |
1866 | return; | |
1867 | } | |
1868 | ||
1869 | update_lft = create = 1; | |
1870 | ifp->cstamp = jiffies; | |
1871 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1872 | } | |
1873 | ||
1874 | if (ifp) { | |
1875 | int flags; | |
1876 | unsigned long now; | |
1877 | #ifdef CONFIG_IPV6_PRIVACY | |
1878 | struct inet6_ifaddr *ift; | |
1879 | #endif | |
1880 | u32 stored_lft; | |
1881 | ||
1882 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1883 | spin_lock(&ifp->lock); | |
1884 | now = jiffies; | |
1885 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1886 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1887 | else | |
1888 | stored_lft = 0; | |
1889 | if (!update_lft && stored_lft) { | |
1890 | if (valid_lft > MIN_VALID_LIFETIME || | |
1891 | valid_lft > stored_lft) | |
1892 | update_lft = 1; | |
1893 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1894 | /* valid_lft <= stored_lft is always true */ | |
1895 | /* XXX: IPsec */ | |
1896 | update_lft = 0; | |
1897 | } else { | |
1898 | valid_lft = MIN_VALID_LIFETIME; | |
1899 | if (valid_lft < prefered_lft) | |
1900 | prefered_lft = valid_lft; | |
1901 | update_lft = 1; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | if (update_lft) { | |
1906 | ifp->valid_lft = valid_lft; | |
1907 | ifp->prefered_lft = prefered_lft; | |
1908 | ifp->tstamp = now; | |
1909 | flags = ifp->flags; | |
1910 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1911 | spin_unlock(&ifp->lock); | |
1912 | ||
1913 | if (!(flags&IFA_F_TENTATIVE)) | |
1914 | ipv6_ifa_notify(0, ifp); | |
1915 | } else | |
1916 | spin_unlock(&ifp->lock); | |
1917 | ||
1918 | #ifdef CONFIG_IPV6_PRIVACY | |
1919 | read_lock_bh(&in6_dev->lock); | |
1920 | /* update all temporary addresses in the list */ | |
1921 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1922 | /* | |
1923 | * When adjusting the lifetimes of an existing | |
1924 | * temporary address, only lower the lifetimes. | |
1925 | * Implementations must not increase the | |
1926 | * lifetimes of an existing temporary address | |
1927 | * when processing a Prefix Information Option. | |
1928 | */ | |
c6fbfac2 BB |
1929 | if (ifp != ift->ifpub) |
1930 | continue; | |
1931 | ||
1da177e4 LT |
1932 | spin_lock(&ift->lock); |
1933 | flags = ift->flags; | |
1934 | if (ift->valid_lft > valid_lft && | |
1935 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1936 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1937 | if (ift->prefered_lft > prefered_lft && | |
1938 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1939 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1940 | spin_unlock(&ift->lock); | |
1941 | if (!(flags&IFA_F_TENTATIVE)) | |
1942 | ipv6_ifa_notify(0, ift); | |
1943 | } | |
1944 | ||
1945 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1946 | /* | |
1947 | * When a new public address is created as described in [ADDRCONF], | |
1948 | * also create a new temporary address. | |
1949 | */ | |
1ab1457c | 1950 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
1951 | ipv6_create_tempaddr(ifp, NULL); |
1952 | } else { | |
1953 | read_unlock_bh(&in6_dev->lock); | |
1954 | } | |
1955 | #endif | |
1956 | in6_ifa_put(ifp); | |
1957 | addrconf_verify(0); | |
1958 | } | |
1959 | } | |
1960 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1961 | in6_dev_put(in6_dev); | |
1962 | } | |
1963 | ||
1964 | /* | |
1965 | * Set destination address. | |
1966 | * Special case for SIT interfaces where we create a new "virtual" | |
1967 | * device. | |
1968 | */ | |
af284937 | 1969 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
1970 | { |
1971 | struct in6_ifreq ireq; | |
1972 | struct net_device *dev; | |
1973 | int err = -EINVAL; | |
1974 | ||
1975 | rtnl_lock(); | |
1976 | ||
1977 | err = -EFAULT; | |
1978 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1979 | goto err_exit; | |
1980 | ||
af284937 | 1981 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
1982 | |
1983 | err = -ENODEV; | |
1984 | if (dev == NULL) | |
1985 | goto err_exit; | |
1986 | ||
0be669bb | 1987 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1988 | if (dev->type == ARPHRD_SIT) { |
1989 | struct ifreq ifr; | |
1990 | mm_segment_t oldfs; | |
1991 | struct ip_tunnel_parm p; | |
1992 | ||
1993 | err = -EADDRNOTAVAIL; | |
1994 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1995 | goto err_exit; | |
1996 | ||
1997 | memset(&p, 0, sizeof(p)); | |
1998 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1999 | p.iph.saddr = 0; | |
2000 | p.iph.version = 4; | |
2001 | p.iph.ihl = 5; | |
2002 | p.iph.protocol = IPPROTO_IPV6; | |
2003 | p.iph.ttl = 64; | |
d20b3109 | 2004 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 LT |
2005 | |
2006 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
2007 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2008 | set_fs(oldfs); | |
2009 | ||
2010 | if (err == 0) { | |
2011 | err = -ENOBUFS; | |
af284937 DL |
2012 | dev = __dev_get_by_name(net, p.name); |
2013 | if (!dev) | |
1da177e4 LT |
2014 | goto err_exit; |
2015 | err = dev_open(dev); | |
2016 | } | |
2017 | } | |
0be669bb | 2018 | #endif |
1da177e4 LT |
2019 | |
2020 | err_exit: | |
2021 | rtnl_unlock(); | |
2022 | return err; | |
2023 | } | |
2024 | ||
2025 | /* | |
2026 | * Manual configuration of address on an interface | |
2027 | */ | |
af284937 | 2028 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2029 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2030 | __u32 valid_lft) |
1da177e4 LT |
2031 | { |
2032 | struct inet6_ifaddr *ifp; | |
2033 | struct inet6_dev *idev; | |
2034 | struct net_device *dev; | |
2035 | int scope; | |
6f704992 YH |
2036 | u32 flags; |
2037 | clock_t expires; | |
4bed72e4 | 2038 | unsigned long timeout; |
1da177e4 LT |
2039 | |
2040 | ASSERT_RTNL(); | |
1ab1457c | 2041 | |
24ef0da7 TG |
2042 | if (plen > 128) |
2043 | return -EINVAL; | |
2044 | ||
0778769d NT |
2045 | /* check the lifetime */ |
2046 | if (!valid_lft || prefered_lft > valid_lft) | |
2047 | return -EINVAL; | |
2048 | ||
af284937 DL |
2049 | dev = __dev_get_by_index(net, ifindex); |
2050 | if (!dev) | |
1da177e4 | 2051 | return -ENODEV; |
1ab1457c | 2052 | |
1da177e4 LT |
2053 | if ((idev = addrconf_add_dev(dev)) == NULL) |
2054 | return -ENOBUFS; | |
2055 | ||
2056 | scope = ipv6_addr_scope(pfx); | |
2057 | ||
4bed72e4 YH |
2058 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2059 | if (addrconf_finite_timeout(timeout)) { | |
2060 | expires = jiffies_to_clock_t(timeout * HZ); | |
2061 | valid_lft = timeout; | |
6f704992 | 2062 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2063 | } else { |
2064 | expires = 0; | |
2065 | flags = 0; | |
2066 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2067 | } |
0778769d | 2068 | |
4bed72e4 YH |
2069 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2070 | if (addrconf_finite_timeout(timeout)) { | |
2071 | if (timeout == 0) | |
2072 | ifa_flags |= IFA_F_DEPRECATED; | |
2073 | prefered_lft = timeout; | |
2074 | } | |
0778769d NT |
2075 | |
2076 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2077 | ||
1da177e4 | 2078 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2079 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2080 | ifp->valid_lft = valid_lft; |
2081 | ifp->prefered_lft = prefered_lft; | |
2082 | ifp->tstamp = jiffies; | |
06aebfb7 | 2083 | spin_unlock_bh(&ifp->lock); |
0778769d | 2084 | |
46d48046 | 2085 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2086 | expires, flags); |
95c385b4 NH |
2087 | /* |
2088 | * Note that section 3.1 of RFC 4429 indicates | |
2089 | * that the Optimistic flag should not be set for | |
2090 | * manually configured addresses | |
2091 | */ | |
1da177e4 LT |
2092 | addrconf_dad_start(ifp, 0); |
2093 | in6_ifa_put(ifp); | |
0778769d | 2094 | addrconf_verify(0); |
1da177e4 LT |
2095 | return 0; |
2096 | } | |
2097 | ||
2098 | return PTR_ERR(ifp); | |
2099 | } | |
2100 | ||
af284937 | 2101 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
24ef0da7 | 2102 | unsigned int plen) |
1da177e4 LT |
2103 | { |
2104 | struct inet6_ifaddr *ifp; | |
2105 | struct inet6_dev *idev; | |
2106 | struct net_device *dev; | |
1ab1457c | 2107 | |
24ef0da7 TG |
2108 | if (plen > 128) |
2109 | return -EINVAL; | |
2110 | ||
af284937 DL |
2111 | dev = __dev_get_by_index(net, ifindex); |
2112 | if (!dev) | |
1da177e4 LT |
2113 | return -ENODEV; |
2114 | ||
2115 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2116 | return -ENXIO; | |
2117 | ||
2118 | read_lock_bh(&idev->lock); | |
2119 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
2120 | if (ifp->prefix_len == plen && | |
2121 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2122 | in6_ifa_hold(ifp); | |
2123 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2124 | |
1da177e4 LT |
2125 | ipv6_del_addr(ifp); |
2126 | ||
2127 | /* If the last address is deleted administratively, | |
2128 | disable IPv6 on this interface. | |
2129 | */ | |
2130 | if (idev->addr_list == NULL) | |
2131 | addrconf_ifdown(idev->dev, 1); | |
2132 | return 0; | |
2133 | } | |
2134 | } | |
2135 | read_unlock_bh(&idev->lock); | |
2136 | return -EADDRNOTAVAIL; | |
2137 | } | |
2138 | ||
2139 | ||
af284937 | 2140 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2141 | { |
2142 | struct in6_ifreq ireq; | |
2143 | int err; | |
1ab1457c | 2144 | |
1da177e4 LT |
2145 | if (!capable(CAP_NET_ADMIN)) |
2146 | return -EPERM; | |
1ab1457c | 2147 | |
1da177e4 LT |
2148 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2149 | return -EFAULT; | |
2150 | ||
2151 | rtnl_lock(); | |
af284937 DL |
2152 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2153 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2154 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2155 | rtnl_unlock(); |
2156 | return err; | |
2157 | } | |
2158 | ||
af284937 | 2159 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2160 | { |
2161 | struct in6_ifreq ireq; | |
2162 | int err; | |
1ab1457c | 2163 | |
1da177e4 LT |
2164 | if (!capable(CAP_NET_ADMIN)) |
2165 | return -EPERM; | |
2166 | ||
2167 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2168 | return -EFAULT; | |
2169 | ||
2170 | rtnl_lock(); | |
af284937 DL |
2171 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2172 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2173 | rtnl_unlock(); |
2174 | return err; | |
2175 | } | |
2176 | ||
0be669bb | 2177 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2178 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2179 | { | |
2180 | struct inet6_ifaddr * ifp; | |
2181 | struct in6_addr addr; | |
2182 | struct net_device *dev; | |
c346dca1 | 2183 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2184 | int scope; |
2185 | ||
2186 | ASSERT_RTNL(); | |
2187 | ||
2188 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2189 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2190 | ||
2191 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2192 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2193 | scope = IFA_LINK; | |
2194 | } else { | |
2195 | scope = IPV6_ADDR_COMPATv4; | |
2196 | } | |
2197 | ||
2198 | if (addr.s6_addr32[3]) { | |
2199 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2200 | if (!IS_ERR(ifp)) { | |
2201 | spin_lock_bh(&ifp->lock); | |
2202 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2203 | spin_unlock_bh(&ifp->lock); | |
2204 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2205 | in6_ifa_put(ifp); | |
2206 | } | |
2207 | return; | |
2208 | } | |
2209 | ||
6fda7350 | 2210 | for_each_netdev(net, dev) { |
e5ed6399 | 2211 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2212 | if (in_dev && (dev->flags & IFF_UP)) { |
2213 | struct in_ifaddr * ifa; | |
2214 | ||
2215 | int flag = scope; | |
2216 | ||
2217 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2218 | int plen; | |
2219 | ||
2220 | addr.s6_addr32[3] = ifa->ifa_local; | |
2221 | ||
2222 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2223 | continue; | |
2224 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2225 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2226 | continue; | |
2227 | flag |= IFA_HOST; | |
2228 | } | |
2229 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2230 | plen = 64; | |
2231 | else | |
2232 | plen = 96; | |
2233 | ||
2234 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2235 | IFA_F_PERMANENT); | |
2236 | if (!IS_ERR(ifp)) { | |
2237 | spin_lock_bh(&ifp->lock); | |
2238 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2239 | spin_unlock_bh(&ifp->lock); | |
2240 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2241 | in6_ifa_put(ifp); | |
2242 | } | |
2243 | } | |
2244 | } | |
1ab1457c | 2245 | } |
1da177e4 | 2246 | } |
0be669bb | 2247 | #endif |
1da177e4 LT |
2248 | |
2249 | static void init_loopback(struct net_device *dev) | |
2250 | { | |
2251 | struct inet6_dev *idev; | |
2252 | struct inet6_ifaddr * ifp; | |
2253 | ||
2254 | /* ::1 */ | |
2255 | ||
2256 | ASSERT_RTNL(); | |
2257 | ||
2258 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2259 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2260 | return; | |
2261 | } | |
2262 | ||
2263 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2264 | if (!IS_ERR(ifp)) { | |
2265 | spin_lock_bh(&ifp->lock); | |
2266 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2267 | spin_unlock_bh(&ifp->lock); | |
2268 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2269 | in6_ifa_put(ifp); | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2274 | { | |
2275 | struct inet6_ifaddr * ifp; | |
95c385b4 NH |
2276 | u32 addr_flags = IFA_F_PERMANENT; |
2277 | ||
2278 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2279 | if (idev->cnf.optimistic_dad && | |
2280 | !ipv6_devconf.forwarding) | |
2281 | addr_flags |= IFA_F_OPTIMISTIC; | |
2282 | #endif | |
1da177e4 | 2283 | |
95c385b4 NH |
2284 | |
2285 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2286 | if (!IS_ERR(ifp)) { |
46d48046 | 2287 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4 LT |
2288 | addrconf_dad_start(ifp, 0); |
2289 | in6_ifa_put(ifp); | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | static void addrconf_dev_config(struct net_device *dev) | |
2294 | { | |
2295 | struct in6_addr addr; | |
2296 | struct inet6_dev * idev; | |
2297 | ||
2298 | ASSERT_RTNL(); | |
2299 | ||
74235a25 HX |
2300 | if ((dev->type != ARPHRD_ETHER) && |
2301 | (dev->type != ARPHRD_FDDI) && | |
2302 | (dev->type != ARPHRD_IEEE802_TR) && | |
2303 | (dev->type != ARPHRD_ARCNET) && | |
2304 | (dev->type != ARPHRD_INFINIBAND)) { | |
2305 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2306 | return; | |
2307 | } | |
2308 | ||
1da177e4 LT |
2309 | idev = addrconf_add_dev(dev); |
2310 | if (idev == NULL) | |
2311 | return; | |
2312 | ||
2313 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2314 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2315 | ||
2316 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2317 | addrconf_add_linklocal(idev, &addr); | |
2318 | } | |
2319 | ||
0be669bb | 2320 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2321 | static void addrconf_sit_config(struct net_device *dev) |
2322 | { | |
2323 | struct inet6_dev *idev; | |
2324 | ||
2325 | ASSERT_RTNL(); | |
2326 | ||
1ab1457c YH |
2327 | /* |
2328 | * Configure the tunnel with one of our IPv4 | |
2329 | * addresses... we should configure all of | |
1da177e4 LT |
2330 | * our v4 addrs in the tunnel |
2331 | */ | |
2332 | ||
2333 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2334 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2335 | return; | |
2336 | } | |
2337 | ||
c7dc89c0 FT |
2338 | if (dev->priv_flags & IFF_ISATAP) { |
2339 | struct in6_addr addr; | |
2340 | ||
2341 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2342 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2343 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2344 | addrconf_add_linklocal(idev, &addr); | |
2345 | return; | |
2346 | } | |
2347 | ||
1da177e4 LT |
2348 | sit_add_v4_addrs(idev); |
2349 | ||
2350 | if (dev->flags&IFF_POINTOPOINT) { | |
2351 | addrconf_add_mroute(dev); | |
2352 | addrconf_add_lroute(dev); | |
2353 | } else | |
2354 | sit_route_add(dev); | |
2355 | } | |
0be669bb | 2356 | #endif |
1da177e4 LT |
2357 | |
2358 | static inline int | |
2359 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2360 | { | |
2361 | struct in6_addr lladdr; | |
2362 | ||
95c385b4 | 2363 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2364 | addrconf_add_linklocal(idev, &lladdr); |
2365 | return 0; | |
2366 | } | |
2367 | return -1; | |
2368 | } | |
2369 | ||
2370 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2371 | { | |
2372 | struct net_device *link_dev; | |
c346dca1 | 2373 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2374 | |
2375 | /* first try to inherit the link-local address from the link device */ | |
2376 | if (idev->dev->iflink && | |
6fda7350 | 2377 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2378 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2379 | return; | |
2380 | } | |
2381 | /* then try to inherit it from any device */ | |
6fda7350 | 2382 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2383 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2384 | return; | |
2385 | } | |
2386 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2387 | } | |
2388 | ||
2389 | /* | |
2390 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2391 | * DHCPv6, MLD etc. can be run over the virtual link | |
2392 | */ | |
2393 | ||
2394 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2395 | { | |
2396 | struct inet6_dev *idev; | |
2397 | ||
2398 | ASSERT_RTNL(); | |
2399 | ||
2400 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2401 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2402 | return; | |
2403 | } | |
2404 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2405 | } |
2406 | ||
1ab1457c | 2407 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4 LT |
2408 | void * data) |
2409 | { | |
2410 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2411 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2412 | int run_pending = 0; |
b217d616 | 2413 | int err; |
1da177e4 LT |
2414 | |
2415 | switch(event) { | |
45ba9dd2 | 2416 | case NETDEV_REGISTER: |
74235a25 | 2417 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2418 | idev = ipv6_add_dev(dev); |
2419 | if (!idev) | |
b217d616 | 2420 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2421 | } |
2422 | break; | |
1da177e4 | 2423 | case NETDEV_UP: |
3c21edbd | 2424 | case NETDEV_CHANGE: |
c2edacf8 JV |
2425 | if (dev->flags & IFF_SLAVE) |
2426 | break; | |
2427 | ||
3c21edbd | 2428 | if (event == NETDEV_UP) { |
f24e3d65 | 2429 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2430 | /* device is not ready yet. */ |
2431 | printk(KERN_INFO | |
2432 | "ADDRCONF(NETDEV_UP): %s: " | |
2433 | "link is not ready\n", | |
2434 | dev->name); | |
2435 | break; | |
2436 | } | |
99081049 | 2437 | |
d31c7b8f EP |
2438 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2439 | idev = ipv6_add_dev(dev); | |
2440 | ||
99081049 KS |
2441 | if (idev) |
2442 | idev->if_flags |= IF_READY; | |
3c21edbd | 2443 | } else { |
f24e3d65 | 2444 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2445 | /* device is still not ready. */ |
2446 | break; | |
2447 | } | |
2448 | ||
2449 | if (idev) { | |
2450 | if (idev->if_flags & IF_READY) { | |
2451 | /* device is already configured. */ | |
2452 | break; | |
2453 | } | |
2454 | idev->if_flags |= IF_READY; | |
2455 | } | |
2456 | ||
2457 | printk(KERN_INFO | |
2458 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2459 | "link becomes ready\n", | |
2460 | dev->name); | |
2461 | ||
c5e33bdd | 2462 | run_pending = 1; |
3c21edbd YH |
2463 | } |
2464 | ||
1da177e4 | 2465 | switch(dev->type) { |
0be669bb | 2466 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2467 | case ARPHRD_SIT: |
2468 | addrconf_sit_config(dev); | |
2469 | break; | |
0be669bb | 2470 | #endif |
1da177e4 LT |
2471 | case ARPHRD_TUNNEL6: |
2472 | addrconf_ip6_tnl_config(dev); | |
2473 | break; | |
2474 | case ARPHRD_LOOPBACK: | |
2475 | init_loopback(dev); | |
2476 | break; | |
2477 | ||
2478 | default: | |
2479 | addrconf_dev_config(dev); | |
2480 | break; | |
3ff50b79 | 2481 | } |
1da177e4 | 2482 | if (idev) { |
c5e33bdd YH |
2483 | if (run_pending) |
2484 | addrconf_dad_run(idev); | |
2485 | ||
1da177e4 LT |
2486 | /* If the MTU changed during the interface down, when the |
2487 | interface up, the changed MTU must be reflected in the | |
2488 | idev as well as routers. | |
2489 | */ | |
2490 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2491 | rt6_mtu_change(dev, dev->mtu); | |
2492 | idev->cnf.mtu6 = dev->mtu; | |
2493 | } | |
2494 | idev->tstamp = jiffies; | |
2495 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2496 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2497 | stop IPv6 on this interface. | |
2498 | */ | |
2499 | if (dev->mtu < IPV6_MIN_MTU) | |
2500 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2501 | } | |
2502 | break; | |
2503 | ||
2504 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2505 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2506 | rt6_mtu_change(dev, dev->mtu); |
2507 | idev->cnf.mtu6 = dev->mtu; | |
2508 | break; | |
2509 | } | |
2510 | ||
d31c7b8f EP |
2511 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2512 | idev = ipv6_add_dev(dev); | |
2513 | if (idev) | |
2514 | break; | |
2515 | } | |
2516 | ||
1da177e4 LT |
2517 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
2518 | ||
2519 | case NETDEV_DOWN: | |
2520 | case NETDEV_UNREGISTER: | |
2521 | /* | |
2522 | * Remove all addresses from this interface. | |
2523 | */ | |
2524 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2525 | break; | |
3c21edbd | 2526 | |
1da177e4 | 2527 | case NETDEV_CHANGENAME: |
1da177e4 | 2528 | if (idev) { |
5632c515 | 2529 | snmp6_unregister_dev(idev); |
408c4768 | 2530 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2531 | addrconf_sysctl_register(idev); |
b217d616 HX |
2532 | err = snmp6_register_dev(idev); |
2533 | if (err) | |
2534 | return notifier_from_errno(err); | |
5632c515 | 2535 | } |
1da177e4 | 2536 | break; |
3ff50b79 | 2537 | } |
1da177e4 LT |
2538 | |
2539 | return NOTIFY_OK; | |
2540 | } | |
2541 | ||
2542 | /* | |
2543 | * addrconf module should be notified of a device going up | |
2544 | */ | |
2545 | static struct notifier_block ipv6_dev_notf = { | |
2546 | .notifier_call = addrconf_notify, | |
2547 | .priority = 0 | |
2548 | }; | |
2549 | ||
2550 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2551 | { | |
2552 | struct inet6_dev *idev; | |
2553 | struct inet6_ifaddr *ifa, **bifa; | |
c346dca1 | 2554 | struct net *net = dev_net(dev); |
1da177e4 LT |
2555 | int i; |
2556 | ||
2557 | ASSERT_RTNL(); | |
2558 | ||
eb867579 | 2559 | if ((dev->flags & IFF_LOOPBACK) && how == 1) |
1da177e4 LT |
2560 | how = 0; |
2561 | ||
f3db4851 | 2562 | rt6_ifdown(net, dev); |
1da177e4 LT |
2563 | neigh_ifdown(&nd_tbl, dev); |
2564 | ||
2565 | idev = __in6_dev_get(dev); | |
2566 | if (idev == NULL) | |
2567 | return -ENODEV; | |
2568 | ||
2569 | /* Step 1: remove reference to ipv6 device from parent device. | |
1ab1457c | 2570 | Do not dev_put! |
1da177e4 | 2571 | */ |
439e2385 | 2572 | if (how) { |
1da177e4 | 2573 | idev->dead = 1; |
8814c4b5 YH |
2574 | |
2575 | /* protected by rtnl_lock */ | |
2576 | rcu_assign_pointer(dev->ip6_ptr, NULL); | |
1da177e4 LT |
2577 | |
2578 | /* Step 1.5: remove snmp6 entry */ | |
2579 | snmp6_unregister_dev(idev); | |
2580 | ||
2581 | } | |
2582 | ||
2583 | /* Step 2: clear hash table */ | |
2584 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2585 | bifa = &inet6_addr_lst[i]; | |
2586 | ||
2587 | write_lock_bh(&addrconf_hash_lock); | |
2588 | while ((ifa = *bifa) != NULL) { | |
2589 | if (ifa->idev == idev) { | |
2590 | *bifa = ifa->lst_next; | |
2591 | ifa->lst_next = NULL; | |
2592 | addrconf_del_timer(ifa); | |
2593 | in6_ifa_put(ifa); | |
2594 | continue; | |
2595 | } | |
2596 | bifa = &ifa->lst_next; | |
2597 | } | |
2598 | write_unlock_bh(&addrconf_hash_lock); | |
2599 | } | |
2600 | ||
2601 | write_lock_bh(&idev->lock); | |
2602 | ||
2603 | /* Step 3: clear flags for stateless addrconf */ | |
439e2385 | 2604 | if (!how) |
3c21edbd | 2605 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2606 | |
2607 | /* Step 4: clear address list */ | |
2608 | #ifdef CONFIG_IPV6_PRIVACY | |
439e2385 | 2609 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2610 | in6_dev_put(idev); |
2611 | ||
2612 | /* clear tempaddr list */ | |
2613 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2614 | idev->tempaddr_list = ifa->tmp_next; | |
2615 | ifa->tmp_next = NULL; | |
2616 | ifa->dead = 1; | |
2617 | write_unlock_bh(&idev->lock); | |
2618 | spin_lock_bh(&ifa->lock); | |
2619 | ||
2620 | if (ifa->ifpub) { | |
2621 | in6_ifa_put(ifa->ifpub); | |
2622 | ifa->ifpub = NULL; | |
2623 | } | |
2624 | spin_unlock_bh(&ifa->lock); | |
2625 | in6_ifa_put(ifa); | |
2626 | write_lock_bh(&idev->lock); | |
2627 | } | |
2628 | #endif | |
2629 | while ((ifa = idev->addr_list) != NULL) { | |
2630 | idev->addr_list = ifa->if_next; | |
2631 | ifa->if_next = NULL; | |
2632 | ifa->dead = 1; | |
2633 | addrconf_del_timer(ifa); | |
2634 | write_unlock_bh(&idev->lock); | |
2635 | ||
2636 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
063ed369 | 2637 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
1da177e4 LT |
2638 | in6_ifa_put(ifa); |
2639 | ||
2640 | write_lock_bh(&idev->lock); | |
2641 | } | |
2642 | write_unlock_bh(&idev->lock); | |
2643 | ||
2644 | /* Step 5: Discard multicast list */ | |
2645 | ||
439e2385 | 2646 | if (how) |
1da177e4 LT |
2647 | ipv6_mc_destroy_dev(idev); |
2648 | else | |
2649 | ipv6_mc_down(idev); | |
2650 | ||
1da177e4 | 2651 | idev->tstamp = jiffies; |
1ab1457c | 2652 | |
1da177e4 LT |
2653 | /* Shot the device (if unregistered) */ |
2654 | ||
439e2385 | 2655 | if (how) { |
408c4768 | 2656 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2657 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2658 | neigh_ifdown(&nd_tbl, dev); | |
2659 | in6_dev_put(idev); | |
2660 | } | |
2661 | return 0; | |
2662 | } | |
2663 | ||
2664 | static void addrconf_rs_timer(unsigned long data) | |
2665 | { | |
2666 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2667 | ||
2668 | if (ifp->idev->cnf.forwarding) | |
2669 | goto out; | |
2670 | ||
2671 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2672 | /* | |
2673 | * Announcement received after solicitation | |
2674 | * was sent | |
2675 | */ | |
2676 | goto out; | |
2677 | } | |
2678 | ||
2679 | spin_lock(&ifp->lock); | |
2680 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
1da177e4 LT |
2681 | /* The wait after the last probe can be shorter */ |
2682 | addrconf_mod_timer(ifp, AC_RS, | |
2683 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2684 | ifp->idev->cnf.rtr_solicit_delay : | |
2685 | ifp->idev->cnf.rtr_solicit_interval); | |
2686 | spin_unlock(&ifp->lock); | |
2687 | ||
f3ee4010 | 2688 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2689 | } else { |
2690 | spin_unlock(&ifp->lock); | |
2691 | /* | |
2692 | * Note: we do not support deprecated "all on-link" | |
2693 | * assumption any longer. | |
2694 | */ | |
2695 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2696 | ifp->idev->dev->name); | |
2697 | } | |
2698 | ||
2699 | out: | |
2700 | in6_ifa_put(ifp); | |
2701 | } | |
2702 | ||
2703 | /* | |
2704 | * Duplicate Address Detection | |
2705 | */ | |
3c21edbd YH |
2706 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2707 | { | |
2708 | unsigned long rand_num; | |
2709 | struct inet6_dev *idev = ifp->idev; | |
2710 | ||
95c385b4 NH |
2711 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2712 | rand_num = 0; | |
2713 | else | |
2714 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2715 | ||
3c21edbd YH |
2716 | ifp->probes = idev->cnf.dad_transmits; |
2717 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2718 | } | |
2719 | ||
e431b8c0 | 2720 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2721 | { |
2722 | struct inet6_dev *idev = ifp->idev; | |
2723 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2724 | |
2725 | addrconf_join_solict(dev, &ifp->addr); | |
2726 | ||
1da177e4 | 2727 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2728 | |
2729 | read_lock_bh(&idev->lock); | |
2730 | if (ifp->dead) | |
2731 | goto out; | |
2732 | spin_lock_bh(&ifp->lock); | |
2733 | ||
2734 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
55ebaef1 NT |
2735 | !(ifp->flags&IFA_F_TENTATIVE) || |
2736 | ifp->flags & IFA_F_NODAD) { | |
95c385b4 | 2737 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2738 | spin_unlock_bh(&ifp->lock); |
2739 | read_unlock_bh(&idev->lock); | |
2740 | ||
2741 | addrconf_dad_completed(ifp); | |
2742 | return; | |
2743 | } | |
2744 | ||
6732bade | 2745 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2746 | spin_unlock_bh(&ifp->lock); |
6732bade | 2747 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2748 | /* |
2749 | * If the defice is not ready: | |
2750 | * - keep it tentative if it is a permanent address. | |
2751 | * - otherwise, kill it. | |
2752 | */ | |
2753 | in6_ifa_hold(ifp); | |
2754 | addrconf_dad_stop(ifp); | |
6732bade | 2755 | return; |
3c21edbd | 2756 | } |
95c385b4 NH |
2757 | |
2758 | /* | |
2759 | * Optimistic nodes can start receiving | |
2760 | * Frames right away | |
2761 | */ | |
2762 | if(ifp->flags & IFA_F_OPTIMISTIC) | |
2763 | ip6_ins_rt(ifp->rt); | |
2764 | ||
6732bade YH |
2765 | addrconf_dad_kick(ifp); |
2766 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2767 | out: |
2768 | read_unlock_bh(&idev->lock); | |
2769 | } | |
2770 | ||
2771 | static void addrconf_dad_timer(unsigned long data) | |
2772 | { | |
2773 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2774 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2775 | struct in6_addr mcaddr; |
2776 | ||
2777 | read_lock_bh(&idev->lock); | |
2778 | if (idev->dead) { | |
2779 | read_unlock_bh(&idev->lock); | |
2780 | goto out; | |
2781 | } | |
2782 | spin_lock_bh(&ifp->lock); | |
2783 | if (ifp->probes == 0) { | |
2784 | /* | |
2785 | * DAD was successful | |
2786 | */ | |
2787 | ||
95c385b4 | 2788 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
1da177e4 LT |
2789 | spin_unlock_bh(&ifp->lock); |
2790 | read_unlock_bh(&idev->lock); | |
2791 | ||
2792 | addrconf_dad_completed(ifp); | |
2793 | ||
2794 | goto out; | |
2795 | } | |
2796 | ||
2797 | ifp->probes--; | |
2798 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2799 | spin_unlock_bh(&ifp->lock); | |
2800 | read_unlock_bh(&idev->lock); | |
2801 | ||
2802 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 2803 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 2804 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
2805 | out: |
2806 | in6_ifa_put(ifp); | |
2807 | } | |
2808 | ||
2809 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2810 | { | |
2811 | struct net_device * dev = ifp->idev->dev; | |
2812 | ||
2813 | /* | |
2814 | * Configure the address for reception. Now it is valid. | |
2815 | */ | |
2816 | ||
2817 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2818 | ||
2819 | /* If added prefix is link local and forwarding is off, | |
2820 | start sending router solicitations. | |
2821 | */ | |
2822 | ||
2823 | if (ifp->idev->cnf.forwarding == 0 && | |
2824 | ifp->idev->cnf.rtr_solicits > 0 && | |
2825 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2826 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
2827 | /* |
2828 | * If a host as already performed a random delay | |
2829 | * [...] as part of DAD [...] there is no need | |
2830 | * to delay again before sending the first RS | |
2831 | */ | |
f3ee4010 | 2832 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2833 | |
2834 | spin_lock_bh(&ifp->lock); | |
2835 | ifp->probes = 1; | |
2836 | ifp->idev->if_flags |= IF_RS_SENT; | |
2837 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2838 | spin_unlock_bh(&ifp->lock); | |
2839 | } | |
2840 | } | |
2841 | ||
c5e33bdd YH |
2842 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2843 | struct inet6_ifaddr *ifp; | |
2844 | ||
2845 | read_lock_bh(&idev->lock); | |
2846 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2847 | spin_lock_bh(&ifp->lock); | |
2848 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2849 | spin_unlock_bh(&ifp->lock); | |
2850 | continue; | |
2851 | } | |
2852 | spin_unlock_bh(&ifp->lock); | |
2853 | addrconf_dad_kick(ifp); | |
2854 | } | |
2855 | read_unlock_bh(&idev->lock); | |
2856 | } | |
2857 | ||
1da177e4 LT |
2858 | #ifdef CONFIG_PROC_FS |
2859 | struct if6_iter_state { | |
3c40090a | 2860 | struct seq_net_private p; |
1da177e4 LT |
2861 | int bucket; |
2862 | }; | |
2863 | ||
2864 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2865 | { | |
2866 | struct inet6_ifaddr *ifa = NULL; | |
2867 | struct if6_iter_state *state = seq->private; | |
1218854a | 2868 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2869 | |
2870 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2871 | ifa = inet6_addr_lst[state->bucket]; | |
3c40090a | 2872 | |
878628fb | 2873 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
3c40090a | 2874 | ifa = ifa->lst_next; |
1da177e4 LT |
2875 | if (ifa) |
2876 | break; | |
2877 | } | |
2878 | return ifa; | |
2879 | } | |
2880 | ||
2881 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2882 | { | |
2883 | struct if6_iter_state *state = seq->private; | |
1218854a | 2884 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
2885 | |
2886 | ifa = ifa->lst_next; | |
2887 | try_again: | |
3c40090a | 2888 | if (ifa) { |
878628fb | 2889 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
3c40090a DL |
2890 | ifa = ifa->lst_next; |
2891 | goto try_again; | |
2892 | } | |
2893 | } | |
2894 | ||
1da177e4 LT |
2895 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
2896 | ifa = inet6_addr_lst[state->bucket]; | |
2897 | goto try_again; | |
2898 | } | |
3c40090a | 2899 | |
1da177e4 LT |
2900 | return ifa; |
2901 | } | |
2902 | ||
2903 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2904 | { | |
2905 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2906 | ||
2907 | if (ifa) | |
2908 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2909 | --pos; | |
2910 | return pos ? NULL : ifa; | |
2911 | } | |
2912 | ||
2913 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
d20b3109 | 2914 | __acquires(addrconf_hash_lock) |
1da177e4 LT |
2915 | { |
2916 | read_lock_bh(&addrconf_hash_lock); | |
2917 | return if6_get_idx(seq, *pos); | |
2918 | } | |
2919 | ||
2920 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2921 | { | |
2922 | struct inet6_ifaddr *ifa; | |
2923 | ||
2924 | ifa = if6_get_next(seq, v); | |
2925 | ++*pos; | |
2926 | return ifa; | |
2927 | } | |
2928 | ||
2929 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
d20b3109 | 2930 | __releases(addrconf_hash_lock) |
1da177e4 LT |
2931 | { |
2932 | read_unlock_bh(&addrconf_hash_lock); | |
2933 | } | |
2934 | ||
2935 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2936 | { | |
2937 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2938 | seq_printf(seq, | |
9343e79a | 2939 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2940 | NIP6(ifp->addr), |
2941 | ifp->idev->dev->ifindex, | |
2942 | ifp->prefix_len, | |
2943 | ifp->scope, | |
2944 | ifp->flags, | |
2945 | ifp->idev->dev->name); | |
2946 | return 0; | |
2947 | } | |
2948 | ||
56b3d975 | 2949 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
2950 | .start = if6_seq_start, |
2951 | .next = if6_seq_next, | |
2952 | .show = if6_seq_show, | |
2953 | .stop = if6_seq_stop, | |
2954 | }; | |
2955 | ||
2956 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2957 | { | |
3c40090a DL |
2958 | return seq_open_net(inode, file, &if6_seq_ops, |
2959 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
2960 | } |
2961 | ||
9a32144e | 2962 | static const struct file_operations if6_fops = { |
1da177e4 LT |
2963 | .owner = THIS_MODULE, |
2964 | .open = if6_seq_open, | |
2965 | .read = seq_read, | |
2966 | .llseek = seq_lseek, | |
3c40090a | 2967 | .release = seq_release_net, |
1da177e4 LT |
2968 | }; |
2969 | ||
3c40090a | 2970 | static int if6_proc_net_init(struct net *net) |
1da177e4 | 2971 | { |
3c40090a | 2972 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
2973 | return -ENOMEM; |
2974 | return 0; | |
2975 | } | |
2976 | ||
3c40090a DL |
2977 | static void if6_proc_net_exit(struct net *net) |
2978 | { | |
2979 | proc_net_remove(net, "if_inet6"); | |
2980 | } | |
2981 | ||
2982 | static struct pernet_operations if6_proc_net_ops = { | |
2983 | .init = if6_proc_net_init, | |
2984 | .exit = if6_proc_net_exit, | |
2985 | }; | |
2986 | ||
2987 | int __init if6_proc_init(void) | |
2988 | { | |
2989 | return register_pernet_subsys(&if6_proc_net_ops); | |
2990 | } | |
2991 | ||
1da177e4 LT |
2992 | void if6_proc_exit(void) |
2993 | { | |
3c40090a | 2994 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
2995 | } |
2996 | #endif /* CONFIG_PROC_FS */ | |
2997 | ||
59fbb3a6 | 2998 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 2999 | /* Check if address is a home address configured on any interface. */ |
389f6612 | 3000 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
3b9f9a1c NT |
3001 | { |
3002 | int ret = 0; | |
3003 | struct inet6_ifaddr * ifp; | |
3004 | u8 hash = ipv6_addr_hash(addr); | |
3005 | read_lock_bh(&addrconf_hash_lock); | |
3006 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { | |
878628fb | 3007 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3008 | continue; |
caad295f | 3009 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3010 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3011 | ret = 1; | |
3012 | break; | |
3013 | } | |
3014 | } | |
3015 | read_unlock_bh(&addrconf_hash_lock); | |
3016 | return ret; | |
3017 | } | |
3018 | #endif | |
3019 | ||
1da177e4 LT |
3020 | /* |
3021 | * Periodic address status verification | |
3022 | */ | |
3023 | ||
3024 | static void addrconf_verify(unsigned long foo) | |
3025 | { | |
3026 | struct inet6_ifaddr *ifp; | |
3027 | unsigned long now, next; | |
3028 | int i; | |
3029 | ||
3030 | spin_lock_bh(&addrconf_verify_lock); | |
3031 | now = jiffies; | |
3032 | next = now + ADDR_CHECK_FREQUENCY; | |
3033 | ||
3034 | del_timer(&addr_chk_timer); | |
3035 | ||
3036 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3037 | ||
3038 | restart: | |
5d5780df | 3039 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
3040 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
3041 | unsigned long age; | |
3042 | #ifdef CONFIG_IPV6_PRIVACY | |
3043 | unsigned long regen_advance; | |
3044 | #endif | |
3045 | ||
3046 | if (ifp->flags & IFA_F_PERMANENT) | |
3047 | continue; | |
3048 | ||
3049 | spin_lock(&ifp->lock); | |
3050 | age = (now - ifp->tstamp) / HZ; | |
3051 | ||
3052 | #ifdef CONFIG_IPV6_PRIVACY | |
1ab1457c YH |
3053 | regen_advance = ifp->idev->cnf.regen_max_retry * |
3054 | ifp->idev->cnf.dad_transmits * | |
1da177e4 LT |
3055 | ifp->idev->nd_parms->retrans_time / HZ; |
3056 | #endif | |
3057 | ||
8f27ebb9 YH |
3058 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3059 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3060 | spin_unlock(&ifp->lock); |
3061 | in6_ifa_hold(ifp); | |
5d5780df | 3062 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3063 | ipv6_del_addr(ifp); |
3064 | goto restart; | |
8f27ebb9 YH |
3065 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3066 | spin_unlock(&ifp->lock); | |
3067 | continue; | |
1da177e4 LT |
3068 | } else if (age >= ifp->prefered_lft) { |
3069 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
3070 | int deprecate = 0; | |
3071 | ||
3072 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3073 | deprecate = 1; | |
3074 | ifp->flags |= IFA_F_DEPRECATED; | |
3075 | } | |
3076 | ||
3077 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3078 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3079 | ||
3080 | spin_unlock(&ifp->lock); | |
3081 | ||
3082 | if (deprecate) { | |
3083 | in6_ifa_hold(ifp); | |
5d5780df | 3084 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3085 | |
3086 | ipv6_ifa_notify(0, ifp); | |
3087 | in6_ifa_put(ifp); | |
3088 | goto restart; | |
3089 | } | |
3090 | #ifdef CONFIG_IPV6_PRIVACY | |
3091 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3092 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
3093 | if (age >= ifp->prefered_lft - regen_advance) { | |
3094 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3095 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3096 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3097 | if (!ifp->regen_count && ifpub) { | |
3098 | ifp->regen_count++; | |
3099 | in6_ifa_hold(ifp); | |
3100 | in6_ifa_hold(ifpub); | |
3101 | spin_unlock(&ifp->lock); | |
5d5780df | 3102 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
3103 | spin_lock(&ifpub->lock); |
3104 | ifpub->regen_count = 0; | |
3105 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3106 | ipv6_create_tempaddr(ifpub, ifp); |
3107 | in6_ifa_put(ifpub); | |
3108 | in6_ifa_put(ifp); | |
3109 | goto restart; | |
3110 | } | |
3111 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3112 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3113 | spin_unlock(&ifp->lock); | |
3114 | #endif | |
3115 | } else { | |
3116 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3117 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3118 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3119 | spin_unlock(&ifp->lock); | |
3120 | } | |
3121 | } | |
5d5780df | 3122 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
3123 | } |
3124 | ||
3125 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
3126 | add_timer(&addr_chk_timer); | |
3127 | spin_unlock_bh(&addrconf_verify_lock); | |
3128 | } | |
3129 | ||
461d8837 TG |
3130 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3131 | { | |
3132 | struct in6_addr *pfx = NULL; | |
3133 | ||
3134 | if (addr) | |
3135 | pfx = nla_data(addr); | |
3136 | ||
3137 | if (local) { | |
3138 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3139 | pfx = NULL; | |
3140 | else | |
3141 | pfx = nla_data(local); | |
3142 | } | |
3143 | ||
3144 | return pfx; | |
3145 | } | |
3146 | ||
ef7c79ed | 3147 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3148 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3149 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3150 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3151 | }; | |
3152 | ||
1da177e4 LT |
3153 | static int |
3154 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3155 | { | |
3b1e0a65 | 3156 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3157 | struct ifaddrmsg *ifm; |
3158 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3159 | struct in6_addr *pfx; |
b933f716 | 3160 | int err; |
1da177e4 | 3161 | |
b933f716 TG |
3162 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3163 | if (err < 0) | |
3164 | return err; | |
3165 | ||
3166 | ifm = nlmsg_data(nlh); | |
3167 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3168 | if (pfx == NULL) |
3169 | return -EINVAL; | |
3170 | ||
af284937 | 3171 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3172 | } |
3173 | ||
55ebaef1 NT |
3174 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3175 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3176 | { |
6f704992 YH |
3177 | u32 flags; |
3178 | clock_t expires; | |
4bed72e4 | 3179 | unsigned long timeout; |
46d48046 | 3180 | |
081bba5b NT |
3181 | if (!valid_lft || (prefered_lft > valid_lft)) |
3182 | return -EINVAL; | |
3183 | ||
4bed72e4 YH |
3184 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3185 | if (addrconf_finite_timeout(timeout)) { | |
3186 | expires = jiffies_to_clock_t(timeout * HZ); | |
3187 | valid_lft = timeout; | |
6f704992 | 3188 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3189 | } else { |
3190 | expires = 0; | |
3191 | flags = 0; | |
3192 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3193 | } |
081bba5b | 3194 | |
4bed72e4 YH |
3195 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3196 | if (addrconf_finite_timeout(timeout)) { | |
3197 | if (timeout == 0) | |
3198 | ifa_flags |= IFA_F_DEPRECATED; | |
3199 | prefered_lft = timeout; | |
3200 | } | |
081bba5b NT |
3201 | |
3202 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3203 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3204 | ifp->tstamp = jiffies; |
3205 | ifp->valid_lft = valid_lft; | |
3206 | ifp->prefered_lft = prefered_lft; | |
3207 | ||
3208 | spin_unlock_bh(&ifp->lock); | |
3209 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3210 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3211 | |
46d48046 | 3212 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3213 | expires, flags); |
081bba5b NT |
3214 | addrconf_verify(0); |
3215 | ||
3216 | return 0; | |
3217 | } | |
3218 | ||
1da177e4 LT |
3219 | static int |
3220 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3221 | { | |
3b1e0a65 | 3222 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3223 | struct ifaddrmsg *ifm; |
3224 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3225 | struct in6_addr *pfx; |
7198f8ce TG |
3226 | struct inet6_ifaddr *ifa; |
3227 | struct net_device *dev; | |
55ebaef1 NT |
3228 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3229 | u8 ifa_flags; | |
461d8837 | 3230 | int err; |
1da177e4 | 3231 | |
461d8837 TG |
3232 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3233 | if (err < 0) | |
3234 | return err; | |
3235 | ||
3236 | ifm = nlmsg_data(nlh); | |
3237 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3238 | if (pfx == NULL) |
3239 | return -EINVAL; | |
3240 | ||
461d8837 | 3241 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3242 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3243 | |
3244 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3245 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3246 | preferred_lft = ci->ifa_prefered; |
3247 | } else { | |
3248 | preferred_lft = INFINITY_LIFE_TIME; | |
3249 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3250 | } |
3251 | ||
af284937 | 3252 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3253 | if (dev == NULL) |
3254 | return -ENODEV; | |
3255 | ||
55ebaef1 | 3256 | /* We ignore other flags so far. */ |
3b9f9a1c | 3257 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3258 | |
1cab3da6 | 3259 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3260 | if (ifa == NULL) { |
3261 | /* | |
3262 | * It would be best to check for !NLM_F_CREATE here but | |
3263 | * userspace alreay relies on not having to provide this. | |
3264 | */ | |
af284937 DL |
3265 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3266 | ifm->ifa_prefixlen, ifa_flags, | |
3267 | preferred_lft, valid_lft); | |
081bba5b NT |
3268 | } |
3269 | ||
7198f8ce TG |
3270 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3271 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3272 | err = -EEXIST; | |
3273 | else | |
55ebaef1 | 3274 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3275 | |
3276 | in6_ifa_put(ifa); | |
3277 | ||
3278 | return err; | |
1da177e4 LT |
3279 | } |
3280 | ||
101bb229 TG |
3281 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3282 | u8 scope, int ifindex) | |
3283 | { | |
3284 | struct ifaddrmsg *ifm; | |
3285 | ||
3286 | ifm = nlmsg_data(nlh); | |
3287 | ifm->ifa_family = AF_INET6; | |
3288 | ifm->ifa_prefixlen = prefixlen; | |
3289 | ifm->ifa_flags = flags; | |
3290 | ifm->ifa_scope = scope; | |
3291 | ifm->ifa_index = ifindex; | |
3292 | } | |
3293 | ||
85486af0 TG |
3294 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3295 | unsigned long tstamp, u32 preferred, u32 valid) | |
3296 | { | |
3297 | struct ifa_cacheinfo ci; | |
3298 | ||
3299 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3300 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3301 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3302 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3303 | ci.ifa_prefered = preferred; | |
3304 | ci.ifa_valid = valid; | |
3305 | ||
3306 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3307 | } | |
3308 | ||
101bb229 TG |
3309 | static inline int rt_scope(int ifa_scope) |
3310 | { | |
3311 | if (ifa_scope & IFA_HOST) | |
3312 | return RT_SCOPE_HOST; | |
3313 | else if (ifa_scope & IFA_LINK) | |
3314 | return RT_SCOPE_LINK; | |
3315 | else if (ifa_scope & IFA_SITE) | |
3316 | return RT_SCOPE_SITE; | |
3317 | else | |
3318 | return RT_SCOPE_UNIVERSE; | |
3319 | } | |
3320 | ||
0ab6803b TG |
3321 | static inline int inet6_ifaddr_msgsize(void) |
3322 | { | |
339bf98f TG |
3323 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3324 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3325 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3326 | } |
c5396a31 | 3327 | |
1da177e4 | 3328 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3329 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3330 | { |
1da177e4 | 3331 | struct nlmsghdr *nlh; |
85486af0 | 3332 | u32 preferred, valid; |
1da177e4 | 3333 | |
0ab6803b TG |
3334 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3335 | if (nlh == NULL) | |
26932566 | 3336 | return -EMSGSIZE; |
0ab6803b | 3337 | |
101bb229 TG |
3338 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3339 | ifa->idev->dev->ifindex); | |
3340 | ||
1da177e4 | 3341 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3342 | preferred = ifa->prefered_lft; |
3343 | valid = ifa->valid_lft; | |
3344 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3345 | long tval = (jiffies - ifa->tstamp)/HZ; |
85486af0 TG |
3346 | preferred -= tval; |
3347 | if (valid != INFINITY_LIFE_TIME) | |
3348 | valid -= tval; | |
1da177e4 LT |
3349 | } |
3350 | } else { | |
85486af0 TG |
3351 | preferred = INFINITY_LIFE_TIME; |
3352 | valid = INFINITY_LIFE_TIME; | |
3353 | } | |
3354 | ||
0ab6803b | 3355 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3356 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3357 | nlmsg_cancel(skb, nlh); | |
3358 | return -EMSGSIZE; | |
3359 | } | |
1da177e4 | 3360 | |
0ab6803b | 3361 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3362 | } |
3363 | ||
3364 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3365 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3366 | { |
1da177e4 | 3367 | struct nlmsghdr *nlh; |
101bb229 TG |
3368 | u8 scope = RT_SCOPE_UNIVERSE; |
3369 | int ifindex = ifmca->idev->dev->ifindex; | |
3370 | ||
3371 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3372 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3373 | |
0ab6803b TG |
3374 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3375 | if (nlh == NULL) | |
26932566 | 3376 | return -EMSGSIZE; |
85486af0 | 3377 | |
0ab6803b TG |
3378 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3379 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3380 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3381 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3382 | nlmsg_cancel(skb, nlh); | |
3383 | return -EMSGSIZE; | |
3384 | } | |
85486af0 | 3385 | |
0ab6803b | 3386 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3387 | } |
3388 | ||
3389 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3390 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3391 | { |
1da177e4 | 3392 | struct nlmsghdr *nlh; |
101bb229 TG |
3393 | u8 scope = RT_SCOPE_UNIVERSE; |
3394 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3395 | ||
3396 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3397 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3398 | |
0ab6803b TG |
3399 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3400 | if (nlh == NULL) | |
26932566 | 3401 | return -EMSGSIZE; |
85486af0 | 3402 | |
0ab6803b TG |
3403 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3404 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3405 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3406 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3407 | nlmsg_cancel(skb, nlh); | |
3408 | return -EMSGSIZE; | |
3409 | } | |
1da177e4 | 3410 | |
0ab6803b | 3411 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3412 | } |
3413 | ||
3414 | enum addr_type_t | |
3415 | { | |
3416 | UNICAST_ADDR, | |
3417 | MULTICAST_ADDR, | |
3418 | ANYCAST_ADDR, | |
3419 | }; | |
3420 | ||
3421 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3422 | enum addr_type_t type) | |
3423 | { | |
3424 | int idx, ip_idx; | |
3425 | int s_idx, s_ip_idx; | |
3426 | int err = 1; | |
3427 | struct net_device *dev; | |
3428 | struct inet6_dev *idev = NULL; | |
3429 | struct inet6_ifaddr *ifa; | |
3430 | struct ifmcaddr6 *ifmca; | |
3431 | struct ifacaddr6 *ifaca; | |
3b1e0a65 | 3432 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3433 | |
3434 | s_idx = cb->args[0]; | |
3435 | s_ip_idx = ip_idx = cb->args[1]; | |
1ab1457c | 3436 | |
7562f876 | 3437 | idx = 0; |
6fda7350 | 3438 | for_each_netdev(net, dev) { |
1da177e4 | 3439 | if (idx < s_idx) |
7562f876 | 3440 | goto cont; |
1da177e4 LT |
3441 | if (idx > s_idx) |
3442 | s_ip_idx = 0; | |
3443 | ip_idx = 0; | |
3444 | if ((idev = in6_dev_get(dev)) == NULL) | |
7562f876 | 3445 | goto cont; |
1da177e4 LT |
3446 | read_lock_bh(&idev->lock); |
3447 | switch (type) { | |
3448 | case UNICAST_ADDR: | |
ae9cda5d | 3449 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3450 | for (ifa = idev->addr_list; ifa; |
3451 | ifa = ifa->if_next, ip_idx++) { | |
3452 | if (ip_idx < s_ip_idx) | |
3453 | continue; | |
5d5619b4 YH |
3454 | err = inet6_fill_ifaddr(skb, ifa, |
3455 | NETLINK_CB(cb->skb).pid, | |
3456 | cb->nlh->nlmsg_seq, | |
3457 | RTM_NEWADDR, | |
3458 | NLM_F_MULTI); | |
1da177e4 | 3459 | } |
1da177e4 LT |
3460 | break; |
3461 | case MULTICAST_ADDR: | |
3462 | /* multicast address */ | |
1ab1457c | 3463 | for (ifmca = idev->mc_list; ifmca; |
1da177e4 LT |
3464 | ifmca = ifmca->next, ip_idx++) { |
3465 | if (ip_idx < s_ip_idx) | |
3466 | continue; | |
5d5619b4 YH |
3467 | err = inet6_fill_ifmcaddr(skb, ifmca, |
3468 | NETLINK_CB(cb->skb).pid, | |
3469 | cb->nlh->nlmsg_seq, | |
3470 | RTM_GETMULTICAST, | |
3471 | NLM_F_MULTI); | |
1da177e4 LT |
3472 | } |
3473 | break; | |
3474 | case ANYCAST_ADDR: | |
3475 | /* anycast address */ | |
3476 | for (ifaca = idev->ac_list; ifaca; | |
3477 | ifaca = ifaca->aca_next, ip_idx++) { | |
3478 | if (ip_idx < s_ip_idx) | |
3479 | continue; | |
5d5619b4 YH |
3480 | err = inet6_fill_ifacaddr(skb, ifaca, |
3481 | NETLINK_CB(cb->skb).pid, | |
3482 | cb->nlh->nlmsg_seq, | |
3483 | RTM_GETANYCAST, | |
3484 | NLM_F_MULTI); | |
1da177e4 LT |
3485 | } |
3486 | break; | |
3487 | default: | |
3488 | break; | |
3489 | } | |
3490 | read_unlock_bh(&idev->lock); | |
3491 | in6_dev_put(idev); | |
5d5619b4 YH |
3492 | |
3493 | if (err <= 0) | |
3494 | break; | |
7562f876 PE |
3495 | cont: |
3496 | idx++; | |
1da177e4 | 3497 | } |
1da177e4 LT |
3498 | cb->args[0] = idx; |
3499 | cb->args[1] = ip_idx; | |
3500 | return skb->len; | |
3501 | } | |
3502 | ||
3503 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3504 | { | |
3505 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3506 | |
1da177e4 LT |
3507 | return inet6_dump_addr(skb, cb, type); |
3508 | } | |
3509 | ||
3510 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3511 | { | |
3512 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3513 | |
1da177e4 LT |
3514 | return inet6_dump_addr(skb, cb, type); |
3515 | } | |
3516 | ||
3517 | ||
3518 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3519 | { | |
3520 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3521 | |
1da177e4 LT |
3522 | return inet6_dump_addr(skb, cb, type); |
3523 | } | |
3524 | ||
1b29fc2c TG |
3525 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
3526 | void *arg) | |
6c223828 | 3527 | { |
3b1e0a65 | 3528 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3529 | struct ifaddrmsg *ifm; |
3530 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3531 | struct in6_addr *addr = NULL; |
3532 | struct net_device *dev = NULL; | |
3533 | struct inet6_ifaddr *ifa; | |
3534 | struct sk_buff *skb; | |
6c223828 NT |
3535 | int err; |
3536 | ||
1b29fc2c TG |
3537 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3538 | if (err < 0) | |
3539 | goto errout; | |
3540 | ||
3541 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3542 | if (addr == NULL) { | |
3543 | err = -EINVAL; | |
3544 | goto errout; | |
6c223828 | 3545 | } |
6c223828 | 3546 | |
1b29fc2c | 3547 | ifm = nlmsg_data(nlh); |
6c223828 | 3548 | if (ifm->ifa_index) |
6fda7350 | 3549 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3550 | |
1cab3da6 | 3551 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
1b29fc2c TG |
3552 | err = -EADDRNOTAVAIL; |
3553 | goto errout; | |
3554 | } | |
6c223828 | 3555 | |
0ab6803b | 3556 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
6c223828 | 3557 | err = -ENOBUFS; |
1b29fc2c | 3558 | goto errout_ifa; |
6c223828 NT |
3559 | } |
3560 | ||
6c223828 NT |
3561 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3562 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3563 | if (err < 0) { |
3564 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3565 | WARN_ON(err == -EMSGSIZE); | |
3566 | kfree_skb(skb); | |
3567 | goto errout_ifa; | |
3568 | } | |
6fda7350 | 3569 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3570 | errout_ifa: |
6c223828 | 3571 | in6_ifa_put(ifa); |
1b29fc2c | 3572 | errout: |
6c223828 | 3573 | return err; |
6c223828 NT |
3574 | } |
3575 | ||
1da177e4 LT |
3576 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3577 | { | |
3578 | struct sk_buff *skb; | |
c346dca1 | 3579 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3580 | int err = -ENOBUFS; |
1da177e4 | 3581 | |
0ab6803b | 3582 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3583 | if (skb == NULL) |
3584 | goto errout; | |
3585 | ||
3586 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3587 | if (err < 0) { |
3588 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3589 | WARN_ON(err == -EMSGSIZE); | |
3590 | kfree_skb(skb); | |
3591 | goto errout; | |
3592 | } | |
6fda7350 | 3593 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5d620266 TG |
3594 | errout: |
3595 | if (err < 0) | |
6fda7350 | 3596 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3597 | } |
3598 | ||
b6f99a21 | 3599 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3600 | __s32 *array, int bytes) |
3601 | { | |
04561c1f TG |
3602 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3603 | ||
1da177e4 LT |
3604 | memset(array, 0, bytes); |
3605 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3606 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3607 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3608 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3609 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3610 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3611 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3612 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3613 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3614 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3615 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3616 | #ifdef CONFIG_IPV6_PRIVACY | |
3617 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3618 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3619 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3620 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3621 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3622 | #endif | |
3623 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3624 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3625 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3626 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3627 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3628 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
fa03ef38 | 3629 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3630 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3631 | #endif | |
930d6ff2 | 3632 | #endif |
fbea49e1 | 3633 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3634 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3635 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3636 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3637 | #endif | |
7bc570c8 YH |
3638 | #ifdef CONFIG_IPV6_MROUTE |
3639 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3640 | #endif | |
1da177e4 LT |
3641 | } |
3642 | ||
339bf98f TG |
3643 | static inline size_t inet6_if_nlmsg_size(void) |
3644 | { | |
3645 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3646 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3647 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3648 | + nla_total_size(4) /* IFLA_MTU */ | |
3649 | + nla_total_size(4) /* IFLA_LINK */ | |
3650 | + nla_total_size( /* IFLA_PROTINFO */ | |
3651 | nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3652 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3653 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
bf99f1bd YH |
3654 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
3655 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ | |
339bf98f TG |
3656 | ); |
3657 | } | |
c5396a31 | 3658 | |
7f7d9a6b HX |
3659 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
3660 | int bytes) | |
3661 | { | |
3662 | int i; | |
3663 | int pad = bytes - sizeof(u64) * items; | |
3664 | BUG_ON(pad < 0); | |
3665 | ||
3666 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3667 | put_unaligned(items, &stats[0]); | |
3668 | for (i = 1; i < items; i++) | |
3669 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); | |
3670 | ||
3671 | memset(&stats[items], 0, pad); | |
3672 | } | |
3673 | ||
3674 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, | |
3675 | int bytes) | |
3676 | { | |
3677 | switch(attrtype) { | |
3678 | case IFLA_INET6_STATS: | |
3679 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
3680 | break; | |
3681 | case IFLA_INET6_ICMP6STATS: | |
3682 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
3683 | break; | |
3684 | } | |
3685 | } | |
3686 | ||
1ab1457c | 3687 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3688 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3689 | { |
04561c1f | 3690 | struct net_device *dev = idev->dev; |
bf99f1bd | 3691 | struct nlattr *nla; |
04561c1f TG |
3692 | struct ifinfomsg *hdr; |
3693 | struct nlmsghdr *nlh; | |
3694 | void *protoinfo; | |
3695 | struct ifla_cacheinfo ci; | |
3696 | ||
3697 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
3698 | if (nlh == NULL) | |
26932566 | 3699 | return -EMSGSIZE; |
04561c1f TG |
3700 | |
3701 | hdr = nlmsg_data(nlh); | |
3702 | hdr->ifi_family = AF_INET6; | |
3703 | hdr->__ifi_pad = 0; | |
3704 | hdr->ifi_type = dev->type; | |
3705 | hdr->ifi_index = dev->ifindex; | |
3706 | hdr->ifi_flags = dev_get_flags(dev); | |
3707 | hdr->ifi_change = 0; | |
3708 | ||
3709 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
1da177e4 LT |
3710 | |
3711 | if (dev->addr_len) | |
04561c1f | 3712 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4 | 3713 | |
04561c1f | 3714 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4 | 3715 | if (dev->ifindex != dev->iflink) |
04561c1f | 3716 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4 | 3717 | |
04561c1f TG |
3718 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
3719 | if (protoinfo == NULL) | |
3720 | goto nla_put_failure; | |
1da177e4 | 3721 | |
04561c1f | 3722 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
1da177e4 | 3723 | |
1da177e4 LT |
3724 | ci.max_reasm_len = IPV6_MAXPLEN; |
3725 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3726 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3727 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3728 | ci.retrans_time = idev->nd_parms->retrans_time; | |
04561c1f TG |
3729 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
3730 | ||
bf99f1bd YH |
3731 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3732 | if (nla == NULL) | |
04561c1f | 3733 | goto nla_put_failure; |
bf99f1bd | 3734 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
1da177e4 | 3735 | |
bf99f1bd YH |
3736 | /* XXX - MC not implemented */ |
3737 | ||
3738 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3739 | if (nla == NULL) | |
3740 | goto nla_put_failure; | |
3741 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
3742 | ||
3743 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
3744 | if (nla == NULL) | |
3745 | goto nla_put_failure; | |
3746 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
1da177e4 | 3747 | |
04561c1f TG |
3748 | nla_nest_end(skb, protoinfo); |
3749 | return nlmsg_end(skb, nlh); | |
1da177e4 | 3750 | |
04561c1f | 3751 | nla_put_failure: |
26932566 PM |
3752 | nlmsg_cancel(skb, nlh); |
3753 | return -EMSGSIZE; | |
1da177e4 LT |
3754 | } |
3755 | ||
3756 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3757 | { | |
3b1e0a65 | 3758 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
3759 | int idx, err; |
3760 | int s_idx = cb->args[0]; | |
3761 | struct net_device *dev; | |
3762 | struct inet6_dev *idev; | |
3763 | ||
3764 | read_lock(&dev_base_lock); | |
7562f876 | 3765 | idx = 0; |
6fda7350 | 3766 | for_each_netdev(net, dev) { |
1da177e4 | 3767 | if (idx < s_idx) |
7562f876 | 3768 | goto cont; |
1da177e4 | 3769 | if ((idev = in6_dev_get(dev)) == NULL) |
7562f876 | 3770 | goto cont; |
1ab1457c | 3771 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
b6544c0b | 3772 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3773 | in6_dev_put(idev); |
3774 | if (err <= 0) | |
3775 | break; | |
7562f876 PE |
3776 | cont: |
3777 | idx++; | |
1da177e4 LT |
3778 | } |
3779 | read_unlock(&dev_base_lock); | |
3780 | cb->args[0] = idx; | |
3781 | ||
3782 | return skb->len; | |
3783 | } | |
3784 | ||
3785 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3786 | { | |
3787 | struct sk_buff *skb; | |
c346dca1 | 3788 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 3789 | int err = -ENOBUFS; |
1ab1457c | 3790 | |
339bf98f | 3791 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
3792 | if (skb == NULL) |
3793 | goto errout; | |
3794 | ||
3795 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
3796 | if (err < 0) { |
3797 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
3798 | WARN_ON(err == -EMSGSIZE); | |
3799 | kfree_skb(skb); | |
3800 | goto errout; | |
3801 | } | |
6fda7350 | 3802 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
8d7a76c9 TG |
3803 | errout: |
3804 | if (err < 0) | |
6fda7350 | 3805 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3806 | } |
3807 | ||
339bf98f TG |
3808 | static inline size_t inet6_prefix_nlmsg_size(void) |
3809 | { | |
3810 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
3811 | + nla_total_size(sizeof(struct in6_addr)) | |
3812 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
3813 | } | |
c5396a31 | 3814 | |
1da177e4 | 3815 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
3816 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3817 | int event, unsigned int flags) | |
1da177e4 | 3818 | { |
6051e2f4 TG |
3819 | struct prefixmsg *pmsg; |
3820 | struct nlmsghdr *nlh; | |
1da177e4 LT |
3821 | struct prefix_cacheinfo ci; |
3822 | ||
6051e2f4 TG |
3823 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
3824 | if (nlh == NULL) | |
26932566 | 3825 | return -EMSGSIZE; |
6051e2f4 TG |
3826 | |
3827 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 3828 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
3829 | pmsg->prefix_pad1 = 0; |
3830 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3831 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3832 | pmsg->prefix_len = pinfo->prefix_len; | |
3833 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3834 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3835 | pmsg->prefix_flags = 0; |
3836 | if (pinfo->onlink) | |
3837 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3838 | if (pinfo->autoconf) | |
3839 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3840 | ||
6051e2f4 | 3841 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4 LT |
3842 | |
3843 | ci.preferred_time = ntohl(pinfo->prefered); | |
3844 | ci.valid_time = ntohl(pinfo->valid); | |
6051e2f4 | 3845 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4 | 3846 | |
6051e2f4 | 3847 | return nlmsg_end(skb, nlh); |
1da177e4 | 3848 | |
6051e2f4 | 3849 | nla_put_failure: |
26932566 PM |
3850 | nlmsg_cancel(skb, nlh); |
3851 | return -EMSGSIZE; | |
1da177e4 LT |
3852 | } |
3853 | ||
1ab1457c | 3854 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
3855 | struct prefix_info *pinfo) |
3856 | { | |
3857 | struct sk_buff *skb; | |
c346dca1 | 3858 | struct net *net = dev_net(idev->dev); |
8c384bfa | 3859 | int err = -ENOBUFS; |
1da177e4 | 3860 | |
339bf98f | 3861 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
3862 | if (skb == NULL) |
3863 | goto errout; | |
3864 | ||
3865 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
3866 | if (err < 0) { |
3867 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
3868 | WARN_ON(err == -EMSGSIZE); | |
3869 | kfree_skb(skb); | |
3870 | goto errout; | |
3871 | } | |
6fda7350 | 3872 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
8c384bfa TG |
3873 | errout: |
3874 | if (err < 0) | |
6fda7350 | 3875 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
3876 | } |
3877 | ||
1da177e4 LT |
3878 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
3879 | { | |
3880 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3881 | ||
3882 | switch (event) { | |
3883 | case RTM_NEWADDR: | |
95c385b4 NH |
3884 | /* |
3885 | * If the address was optimistic | |
3886 | * we inserted the route at the start of | |
3887 | * our DAD process, so we don't need | |
3888 | * to do it again | |
3889 | */ | |
3890 | if (!(ifp->rt->rt6i_node)) | |
3891 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
3892 | if (ifp->idev->cnf.forwarding) |
3893 | addrconf_join_anycast(ifp); | |
3894 | break; | |
3895 | case RTM_DELADDR: | |
3896 | if (ifp->idev->cnf.forwarding) | |
3897 | addrconf_leave_anycast(ifp); | |
3898 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3899 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3900 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3901 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3902 | break; |
3903 | } | |
3904 | } | |
3905 | ||
3906 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3907 | { | |
8814c4b5 | 3908 | rcu_read_lock_bh(); |
1da177e4 LT |
3909 | if (likely(ifp->idev->dead == 0)) |
3910 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 3911 | rcu_read_unlock_bh(); |
1da177e4 LT |
3912 | } |
3913 | ||
3914 | #ifdef CONFIG_SYSCTL | |
3915 | ||
3916 | static | |
3917 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3918 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3919 | { | |
3920 | int *valp = ctl->data; | |
3921 | int val = *valp; | |
3922 | int ret; | |
3923 | ||
3924 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3925 | ||
c8fecf22 PE |
3926 | if (write) |
3927 | addrconf_fixup_forwarding(ctl, valp, val); | |
1ab1457c | 3928 | return ret; |
1da177e4 LT |
3929 | } |
3930 | ||
1ab1457c | 3931 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
1da177e4 LT |
3932 | int __user *name, int nlen, |
3933 | void __user *oldval, | |
3934 | size_t __user *oldlenp, | |
1f29bcd7 | 3935 | void __user *newval, size_t newlen) |
1da177e4 LT |
3936 | { |
3937 | int *valp = table->data; | |
c8fecf22 | 3938 | int val = *valp; |
1da177e4 LT |
3939 | int new; |
3940 | ||
3941 | if (!newval || !newlen) | |
3942 | return 0; | |
3943 | if (newlen != sizeof(int)) | |
3944 | return -EINVAL; | |
3945 | if (get_user(new, (int __user *)newval)) | |
3946 | return -EFAULT; | |
3947 | if (new == *valp) | |
3948 | return 0; | |
3949 | if (oldval && oldlenp) { | |
3950 | size_t len; | |
3951 | if (get_user(len, oldlenp)) | |
3952 | return -EFAULT; | |
3953 | if (len) { | |
3954 | if (len > table->maxlen) | |
3955 | len = table->maxlen; | |
3956 | if (copy_to_user(oldval, valp, len)) | |
3957 | return -EFAULT; | |
3958 | if (put_user(len, oldlenp)) | |
3959 | return -EFAULT; | |
3960 | } | |
3961 | } | |
3962 | ||
c8fecf22 PE |
3963 | *valp = new; |
3964 | addrconf_fixup_forwarding(table, valp, val); | |
1da177e4 LT |
3965 | return 1; |
3966 | } | |
3967 | ||
3968 | static struct addrconf_sysctl_table | |
3969 | { | |
3970 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 3971 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab6222 | 3972 | char *dev_name; |
ab32ea5d | 3973 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3974 | .sysctl_header = NULL, |
3975 | .addrconf_vars = { | |
1ab1457c | 3976 | { |
1da177e4 LT |
3977 | .ctl_name = NET_IPV6_FORWARDING, |
3978 | .procname = "forwarding", | |
1ab1457c | 3979 | .data = &ipv6_devconf.forwarding, |
1da177e4 LT |
3980 | .maxlen = sizeof(int), |
3981 | .mode = 0644, | |
1ab1457c | 3982 | .proc_handler = &addrconf_sysctl_forward, |
1da177e4 LT |
3983 | .strategy = &addrconf_sysctl_forward_strategy, |
3984 | }, | |
3985 | { | |
3986 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3987 | .procname = "hop_limit", | |
1ab1457c | 3988 | .data = &ipv6_devconf.hop_limit, |
1da177e4 LT |
3989 | .maxlen = sizeof(int), |
3990 | .mode = 0644, | |
3991 | .proc_handler = proc_dointvec, | |
3992 | }, | |
3993 | { | |
3994 | .ctl_name = NET_IPV6_MTU, | |
3995 | .procname = "mtu", | |
3996 | .data = &ipv6_devconf.mtu6, | |
1ab1457c | 3997 | .maxlen = sizeof(int), |
1da177e4 | 3998 | .mode = 0644, |
1ab1457c | 3999 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4000 | }, |
4001 | { | |
4002 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
4003 | .procname = "accept_ra", | |
1ab1457c | 4004 | .data = &ipv6_devconf.accept_ra, |
1da177e4 LT |
4005 | .maxlen = sizeof(int), |
4006 | .mode = 0644, | |
1ab1457c | 4007 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4008 | }, |
4009 | { | |
4010 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
4011 | .procname = "accept_redirects", | |
1ab1457c | 4012 | .data = &ipv6_devconf.accept_redirects, |
1da177e4 LT |
4013 | .maxlen = sizeof(int), |
4014 | .mode = 0644, | |
1ab1457c | 4015 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4016 | }, |
4017 | { | |
4018 | .ctl_name = NET_IPV6_AUTOCONF, | |
4019 | .procname = "autoconf", | |
1ab1457c | 4020 | .data = &ipv6_devconf.autoconf, |
1da177e4 LT |
4021 | .maxlen = sizeof(int), |
4022 | .mode = 0644, | |
1ab1457c | 4023 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4024 | }, |
4025 | { | |
4026 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
4027 | .procname = "dad_transmits", | |
1ab1457c | 4028 | .data = &ipv6_devconf.dad_transmits, |
1da177e4 LT |
4029 | .maxlen = sizeof(int), |
4030 | .mode = 0644, | |
1ab1457c | 4031 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4032 | }, |
4033 | { | |
4034 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
4035 | .procname = "router_solicitations", | |
1ab1457c | 4036 | .data = &ipv6_devconf.rtr_solicits, |
1da177e4 LT |
4037 | .maxlen = sizeof(int), |
4038 | .mode = 0644, | |
1ab1457c | 4039 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4040 | }, |
4041 | { | |
4042 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
4043 | .procname = "router_solicitation_interval", | |
1ab1457c | 4044 | .data = &ipv6_devconf.rtr_solicit_interval, |
1da177e4 LT |
4045 | .maxlen = sizeof(int), |
4046 | .mode = 0644, | |
1ab1457c | 4047 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
4048 | .strategy = &sysctl_jiffies, |
4049 | }, | |
4050 | { | |
4051 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
4052 | .procname = "router_solicitation_delay", | |
1ab1457c | 4053 | .data = &ipv6_devconf.rtr_solicit_delay, |
1da177e4 LT |
4054 | .maxlen = sizeof(int), |
4055 | .mode = 0644, | |
1ab1457c | 4056 | .proc_handler = &proc_dointvec_jiffies, |
1da177e4 LT |
4057 | .strategy = &sysctl_jiffies, |
4058 | }, | |
4059 | { | |
4060 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
4061 | .procname = "force_mld_version", | |
1ab1457c | 4062 | .data = &ipv6_devconf.force_mld_version, |
1da177e4 LT |
4063 | .maxlen = sizeof(int), |
4064 | .mode = 0644, | |
1ab1457c | 4065 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4066 | }, |
4067 | #ifdef CONFIG_IPV6_PRIVACY | |
4068 | { | |
4069 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
4070 | .procname = "use_tempaddr", | |
1ab1457c | 4071 | .data = &ipv6_devconf.use_tempaddr, |
1da177e4 LT |
4072 | .maxlen = sizeof(int), |
4073 | .mode = 0644, | |
1ab1457c | 4074 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4075 | }, |
4076 | { | |
4077 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
4078 | .procname = "temp_valid_lft", | |
1ab1457c | 4079 | .data = &ipv6_devconf.temp_valid_lft, |
1da177e4 LT |
4080 | .maxlen = sizeof(int), |
4081 | .mode = 0644, | |
1ab1457c | 4082 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4083 | }, |
4084 | { | |
4085 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
4086 | .procname = "temp_prefered_lft", | |
1ab1457c | 4087 | .data = &ipv6_devconf.temp_prefered_lft, |
1da177e4 LT |
4088 | .maxlen = sizeof(int), |
4089 | .mode = 0644, | |
1ab1457c | 4090 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4091 | }, |
4092 | { | |
4093 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
4094 | .procname = "regen_max_retry", | |
1ab1457c | 4095 | .data = &ipv6_devconf.regen_max_retry, |
1da177e4 LT |
4096 | .maxlen = sizeof(int), |
4097 | .mode = 0644, | |
1ab1457c | 4098 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4099 | }, |
4100 | { | |
4101 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
4102 | .procname = "max_desync_factor", | |
1ab1457c | 4103 | .data = &ipv6_devconf.max_desync_factor, |
1da177e4 LT |
4104 | .maxlen = sizeof(int), |
4105 | .mode = 0644, | |
1ab1457c | 4106 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
4107 | }, |
4108 | #endif | |
4109 | { | |
4110 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
4111 | .procname = "max_addresses", | |
4112 | .data = &ipv6_devconf.max_addresses, | |
4113 | .maxlen = sizeof(int), | |
4114 | .mode = 0644, | |
4115 | .proc_handler = &proc_dointvec, | |
4116 | }, | |
65f5c7c1 YH |
4117 | { |
4118 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
4119 | .procname = "accept_ra_defrtr", | |
1ab1457c | 4120 | .data = &ipv6_devconf.accept_ra_defrtr, |
65f5c7c1 YH |
4121 | .maxlen = sizeof(int), |
4122 | .mode = 0644, | |
1ab1457c | 4123 | .proc_handler = &proc_dointvec, |
65f5c7c1 | 4124 | }, |
c4fd30eb YH |
4125 | { |
4126 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
4127 | .procname = "accept_ra_pinfo", | |
1ab1457c | 4128 | .data = &ipv6_devconf.accept_ra_pinfo, |
c4fd30eb YH |
4129 | .maxlen = sizeof(int), |
4130 | .mode = 0644, | |
1ab1457c | 4131 | .proc_handler = &proc_dointvec, |
c4fd30eb | 4132 | }, |
930d6ff2 YH |
4133 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4134 | { | |
4135 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
4136 | .procname = "accept_ra_rtr_pref", | |
4137 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4138 | .maxlen = sizeof(int), | |
4139 | .mode = 0644, | |
4140 | .proc_handler = &proc_dointvec, | |
4141 | }, | |
52e16356 YH |
4142 | { |
4143 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
4144 | .procname = "router_probe_interval", | |
4145 | .data = &ipv6_devconf.rtr_probe_interval, | |
4146 | .maxlen = sizeof(int), | |
4147 | .mode = 0644, | |
4148 | .proc_handler = &proc_dointvec_jiffies, | |
4149 | .strategy = &sysctl_jiffies, | |
4150 | }, | |
fa03ef38 | 4151 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4152 | { |
4153 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
4154 | .procname = "accept_ra_rt_info_max_plen", | |
4155 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4156 | .maxlen = sizeof(int), | |
4157 | .mode = 0644, | |
4158 | .proc_handler = &proc_dointvec, | |
4159 | }, | |
4160 | #endif | |
930d6ff2 | 4161 | #endif |
fbea49e1 YH |
4162 | { |
4163 | .ctl_name = NET_IPV6_PROXY_NDP, | |
4164 | .procname = "proxy_ndp", | |
4165 | .data = &ipv6_devconf.proxy_ndp, | |
4166 | .maxlen = sizeof(int), | |
4167 | .mode = 0644, | |
4168 | .proc_handler = &proc_dointvec, | |
4169 | }, | |
0bcbc926 YH |
4170 | { |
4171 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, | |
4172 | .procname = "accept_source_route", | |
4173 | .data = &ipv6_devconf.accept_source_route, | |
4174 | .maxlen = sizeof(int), | |
4175 | .mode = 0644, | |
4176 | .proc_handler = &proc_dointvec, | |
4177 | }, | |
95c385b4 NH |
4178 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4179 | { | |
4180 | .ctl_name = CTL_UNNUMBERED, | |
4181 | .procname = "optimistic_dad", | |
4182 | .data = &ipv6_devconf.optimistic_dad, | |
4183 | .maxlen = sizeof(int), | |
4184 | .mode = 0644, | |
4185 | .proc_handler = &proc_dointvec, | |
4186 | ||
4187 | }, | |
7bc570c8 YH |
4188 | #endif |
4189 | #ifdef CONFIG_IPV6_MROUTE | |
4190 | { | |
4191 | .ctl_name = CTL_UNNUMBERED, | |
4192 | .procname = "mc_forwarding", | |
4193 | .data = &ipv6_devconf.mc_forwarding, | |
4194 | .maxlen = sizeof(int), | |
4195 | .mode = 0644, | |
4196 | .proc_handler = &proc_dointvec, | |
4197 | }, | |
95c385b4 | 4198 | #endif |
1da177e4 LT |
4199 | { |
4200 | .ctl_name = 0, /* sentinel */ | |
4201 | } | |
4202 | }, | |
1da177e4 LT |
4203 | }; |
4204 | ||
bff16c2f PE |
4205 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
4206 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) | |
1da177e4 LT |
4207 | { |
4208 | int i; | |
1da177e4 | 4209 | struct addrconf_sysctl_table *t; |
1da177e4 | 4210 | |
1dab6222 PE |
4211 | #define ADDRCONF_CTL_PATH_DEV 3 |
4212 | ||
4213 | struct ctl_path addrconf_ctl_path[] = { | |
4214 | { .procname = "net", .ctl_name = CTL_NET, }, | |
4215 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, | |
4216 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, | |
4217 | { /* to be set */ }, | |
4218 | { }, | |
4219 | }; | |
4220 | ||
4221 | ||
af879cc7 | 4222 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4223 | if (t == NULL) |
f68635e6 PE |
4224 | goto out; |
4225 | ||
1da177e4 LT |
4226 | for (i=0; t->addrconf_vars[i].data; i++) { |
4227 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
1da177e4 | 4228 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4229 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4230 | } |
1da177e4 | 4231 | |
1ab1457c YH |
4232 | /* |
4233 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
4234 | * by sysctl and we wouldn't want anyone to change it under our feet |
4235 | * (see SIOCSIFNAME). | |
1ab1457c | 4236 | */ |
1dab6222 PE |
4237 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
4238 | if (!t->dev_name) | |
f68635e6 | 4239 | goto free; |
1da177e4 | 4240 | |
1dab6222 PE |
4241 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
4242 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; | |
1da177e4 | 4243 | |
bff16c2f | 4244 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab6222 | 4245 | t->addrconf_vars); |
1da177e4 LT |
4246 | if (t->sysctl_header == NULL) |
4247 | goto free_procname; | |
f68635e6 PE |
4248 | |
4249 | p->sysctl = t; | |
95897312 | 4250 | return 0; |
1da177e4 | 4251 | |
f68635e6 | 4252 | free_procname: |
1dab6222 | 4253 | kfree(t->dev_name); |
f68635e6 | 4254 | free: |
1da177e4 | 4255 | kfree(t); |
f68635e6 | 4256 | out: |
95897312 | 4257 | return -ENOBUFS; |
1da177e4 LT |
4258 | } |
4259 | ||
408c4768 PE |
4260 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4261 | { | |
4262 | struct addrconf_sysctl_table *t; | |
4263 | ||
4264 | if (p->sysctl == NULL) | |
4265 | return; | |
4266 | ||
4267 | t = p->sysctl; | |
4268 | p->sysctl = NULL; | |
4269 | unregister_sysctl_table(t->sysctl_header); | |
4270 | kfree(t->dev_name); | |
4271 | kfree(t); | |
4272 | } | |
4273 | ||
f52295a9 PE |
4274 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4275 | { | |
408c4768 PE |
4276 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
4277 | NET_IPV6_NEIGH, "ipv6", | |
4278 | &ndisc_ifinfo_sysctl_change, | |
0686caa3 | 4279 | ndisc_ifinfo_sysctl_strategy); |
c346dca1 | 4280 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
bff16c2f | 4281 | idev->dev->ifindex, idev, &idev->cnf); |
f52295a9 PE |
4282 | } |
4283 | ||
408c4768 | 4284 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4285 | { |
408c4768 PE |
4286 | __addrconf_sysctl_unregister(&idev->cnf); |
4287 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4288 | } |
4289 | ||
4290 | ||
4291 | #endif | |
4292 | ||
e0da5a48 PE |
4293 | static int addrconf_init_net(struct net *net) |
4294 | { | |
4295 | int err; | |
4296 | struct ipv6_devconf *all, *dflt; | |
4297 | ||
4298 | err = -ENOMEM; | |
4299 | all = &ipv6_devconf; | |
4300 | dflt = &ipv6_devconf_dflt; | |
4301 | ||
4302 | if (net != &init_net) { | |
4303 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); | |
4304 | if (all == NULL) | |
4305 | goto err_alloc_all; | |
4306 | ||
4307 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4308 | if (dflt == NULL) | |
4309 | goto err_alloc_dflt; | |
4310 | } | |
4311 | ||
4312 | net->ipv6.devconf_all = all; | |
4313 | net->ipv6.devconf_dflt = dflt; | |
4314 | ||
4315 | #ifdef CONFIG_SYSCTL | |
4316 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, | |
4317 | NULL, all); | |
4318 | if (err < 0) | |
4319 | goto err_reg_all; | |
4320 | ||
4321 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, | |
4322 | NULL, dflt); | |
4323 | if (err < 0) | |
4324 | goto err_reg_dflt; | |
4325 | #endif | |
4326 | return 0; | |
4327 | ||
4328 | #ifdef CONFIG_SYSCTL | |
4329 | err_reg_dflt: | |
4330 | __addrconf_sysctl_unregister(all); | |
4331 | err_reg_all: | |
4332 | kfree(dflt); | |
4333 | #endif | |
4334 | err_alloc_dflt: | |
4335 | kfree(all); | |
4336 | err_alloc_all: | |
4337 | return err; | |
4338 | } | |
4339 | ||
4340 | static void addrconf_exit_net(struct net *net) | |
4341 | { | |
4342 | #ifdef CONFIG_SYSCTL | |
4343 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4344 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4345 | #endif | |
4346 | if (net != &init_net) { | |
4347 | kfree(net->ipv6.devconf_dflt); | |
4348 | kfree(net->ipv6.devconf_all); | |
4349 | } | |
4350 | } | |
4351 | ||
4352 | static struct pernet_operations addrconf_ops = { | |
4353 | .init = addrconf_init_net, | |
4354 | .exit = addrconf_exit_net, | |
4355 | }; | |
4356 | ||
1da177e4 LT |
4357 | /* |
4358 | * Device notifier | |
4359 | */ | |
4360 | ||
4361 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4362 | { | |
1ab1457c | 4363 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
4364 | } |
4365 | ||
7159039a YH |
4366 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4367 | ||
1da177e4 LT |
4368 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4369 | { | |
1ab1457c | 4370 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
4371 | } |
4372 | ||
7159039a YH |
4373 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4374 | ||
af284937 DL |
4375 | static void addrconf_net_exit(struct net *net) |
4376 | { | |
6fda7350 BT |
4377 | struct net_device *dev; |
4378 | ||
6fda7350 BT |
4379 | rtnl_lock(); |
4380 | /* clean dev list */ | |
4381 | for_each_netdev(net, dev) { | |
4382 | if (__in6_dev_get(dev) == NULL) | |
4383 | continue; | |
4384 | addrconf_ifdown(dev, 1); | |
4385 | } | |
4386 | addrconf_ifdown(net->loopback_dev, 2); | |
4387 | rtnl_unlock(); | |
af284937 DL |
4388 | } |
4389 | ||
4390 | static struct pernet_operations addrconf_net_ops = { | |
af284937 DL |
4391 | .exit = addrconf_net_exit, |
4392 | }; | |
4393 | ||
1da177e4 LT |
4394 | /* |
4395 | * Init / cleanup code | |
4396 | */ | |
4397 | ||
4398 | int __init addrconf_init(void) | |
4399 | { | |
2a8cc6c8 YH |
4400 | int err; |
4401 | ||
4402 | if ((err = ipv6_addr_label_init()) < 0) { | |
4403 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", | |
4404 | err); | |
4405 | return err; | |
4406 | } | |
1da177e4 | 4407 | |
e0da5a48 PE |
4408 | register_pernet_subsys(&addrconf_ops); |
4409 | ||
1da177e4 LT |
4410 | /* The addrconf netdev notifier requires that loopback_dev |
4411 | * has it's ipv6 private information allocated and setup | |
4412 | * before it can bring up and give link-local addresses | |
4413 | * to other devices which are up. | |
4414 | * | |
4415 | * Unfortunately, loopback_dev is not necessarily the first | |
4416 | * entry in the global dev_base list of net devices. In fact, | |
4417 | * it is likely to be the very last entry on that list. | |
4418 | * So this causes the notifier registry below to try and | |
4419 | * give link-local addresses to all devices besides loopback_dev | |
4420 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4421 | * devices to fail to get a link-local address. | |
4422 | * | |
4423 | * So, as a temporary fix, allocate the ipv6 structure for | |
4424 | * loopback_dev first by hand. | |
4425 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4426 | * device and it being up should be removed. | |
4427 | */ | |
4428 | rtnl_lock(); | |
2774c7ab | 4429 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4430 | err = -ENOMEM; |
4431 | rtnl_unlock(); | |
4432 | if (err) | |
e0da5a48 | 4433 | goto errlo; |
1da177e4 | 4434 | |
af284937 DL |
4435 | err = register_pernet_device(&addrconf_net_ops); |
4436 | if (err) | |
4437 | return err; | |
4438 | ||
1da177e4 LT |
4439 | register_netdevice_notifier(&ipv6_dev_notf); |
4440 | ||
1da177e4 | 4441 | addrconf_verify(0); |
c127ea2c TG |
4442 | |
4443 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); | |
4444 | if (err < 0) | |
4445 | goto errout; | |
4446 | ||
4447 | /* Only the first call to __rtnl_register can fail */ | |
4448 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); | |
4449 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); | |
4450 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); | |
4451 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); | |
4452 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); | |
4453 | ||
2a8cc6c8 YH |
4454 | ipv6_addr_label_rtnl_register(); |
4455 | ||
1da177e4 | 4456 | return 0; |
c127ea2c TG |
4457 | errout: |
4458 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 PE |
4459 | errlo: |
4460 | unregister_pernet_subsys(&addrconf_ops); | |
c127ea2c TG |
4461 | |
4462 | return err; | |
1da177e4 LT |
4463 | } |
4464 | ||
09f7709f | 4465 | void addrconf_cleanup(void) |
1da177e4 | 4466 | { |
1ab1457c | 4467 | struct inet6_ifaddr *ifa; |
1da177e4 LT |
4468 | int i; |
4469 | ||
4470 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
af284937 | 4471 | unregister_pernet_device(&addrconf_net_ops); |
1da177e4 | 4472 | |
e0da5a48 | 4473 | unregister_pernet_subsys(&addrconf_ops); |
1da177e4 LT |
4474 | |
4475 | rtnl_lock(); | |
4476 | ||
1da177e4 LT |
4477 | /* |
4478 | * Check hash table. | |
4479 | */ | |
1da177e4 LT |
4480 | write_lock_bh(&addrconf_hash_lock); |
4481 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4482 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4483 | struct inet6_ifaddr *bifa; | |
4484 | ||
4485 | bifa = ifa; | |
4486 | ifa = ifa->lst_next; | |
4487 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4488 | /* Do not free it; something is wrong. | |
4489 | Now we can investigate it with debugger. | |
4490 | */ | |
4491 | } | |
4492 | } | |
4493 | write_unlock_bh(&addrconf_hash_lock); | |
4494 | ||
4495 | del_timer(&addr_chk_timer); | |
1da177e4 | 4496 | rtnl_unlock(); |
af284937 DL |
4497 | |
4498 | unregister_pernet_subsys(&addrconf_net_ops); | |
1da177e4 | 4499 | } |