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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
47 | #include <linux/sched.h> | |
48 | #include <linux/net.h> | |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
51 | #include <linux/if_arp.h> | |
52 | #include <linux/if_arcnet.h> | |
53 | #include <linux/if_infiniband.h> | |
54 | #include <linux/route.h> | |
55 | #include <linux/inetdevice.h> | |
56 | #include <linux/init.h> | |
57 | #ifdef CONFIG_SYSCTL | |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
1da177e4 LT |
64 | |
65 | #include <net/sock.h> | |
66 | #include <net/snmp.h> | |
67 | ||
68 | #include <net/ipv6.h> | |
69 | #include <net/protocol.h> | |
70 | #include <net/ndisc.h> | |
71 | #include <net/ip6_route.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/tcp.h> | |
74 | #include <net/ip.h> | |
75 | #include <linux/if_tunnel.h> | |
76 | #include <linux/rtnetlink.h> | |
77 | ||
78 | #ifdef CONFIG_IPV6_PRIVACY | |
79 | #include <linux/random.h> | |
1da177e4 LT |
80 | #endif |
81 | ||
82 | #include <asm/uaccess.h> | |
83 | ||
84 | #include <linux/proc_fs.h> | |
85 | #include <linux/seq_file.h> | |
86 | ||
87 | /* Set to 3 to get tracing... */ | |
88 | #define ACONF_DEBUG 2 | |
89 | ||
90 | #if ACONF_DEBUG >= 3 | |
91 | #define ADBG(x) printk x | |
92 | #else | |
93 | #define ADBG(x) | |
94 | #endif | |
95 | ||
96 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
97 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
98 | ||
99 | #ifdef CONFIG_SYSCTL | |
100 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
101 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
102 | #endif | |
103 | ||
104 | #ifdef CONFIG_IPV6_PRIVACY | |
105 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
106 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
107 | static void ipv6_regen_rndid(unsigned long data); | |
108 | ||
109 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
110 | #endif |
111 | ||
112 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
113 | ||
114 | /* | |
115 | * Configured unicast address hash table | |
116 | */ | |
117 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
118 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
119 | ||
120 | /* Protects inet6 devices */ | |
121 | DEFINE_RWLOCK(addrconf_lock); | |
122 | ||
123 | static void addrconf_verify(unsigned long); | |
124 | ||
8d06afab | 125 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
126 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
127 | ||
128 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
129 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
130 | ||
131 | static int addrconf_ifdown(struct net_device *dev, int how); | |
132 | ||
e431b8c0 | 133 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
134 | static void addrconf_dad_timer(unsigned long data); |
135 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 136 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
137 | static void addrconf_rs_timer(unsigned long data); |
138 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
139 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
140 | ||
141 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
142 | struct prefix_info *pinfo); | |
143 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
144 | ||
e041c683 | 145 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 LT |
146 | |
147 | struct ipv6_devconf ipv6_devconf = { | |
148 | .forwarding = 0, | |
149 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
150 | .mtu6 = IPV6_MIN_MTU, | |
151 | .accept_ra = 1, | |
152 | .accept_redirects = 1, | |
153 | .autoconf = 1, | |
154 | .force_mld_version = 0, | |
155 | .dad_transmits = 1, | |
156 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
157 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
158 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
159 | #ifdef CONFIG_IPV6_PRIVACY | |
160 | .use_tempaddr = 0, | |
161 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
162 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
163 | .regen_max_retry = REGEN_MAX_RETRY, | |
164 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
165 | #endif | |
166 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 167 | .accept_ra_defrtr = 1, |
c4fd30eb | 168 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
169 | #ifdef CONFIG_IPV6_ROUTER_PREF |
170 | .accept_ra_rtr_pref = 1, | |
52e16356 | 171 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
172 | #ifdef CONFIG_IPV6_ROUTE_INFO |
173 | .accept_ra_rt_info_max_plen = 0, | |
174 | #endif | |
930d6ff2 | 175 | #endif |
1da177e4 LT |
176 | }; |
177 | ||
178 | static struct ipv6_devconf ipv6_devconf_dflt = { | |
179 | .forwarding = 0, | |
180 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
181 | .mtu6 = IPV6_MIN_MTU, | |
182 | .accept_ra = 1, | |
183 | .accept_redirects = 1, | |
184 | .autoconf = 1, | |
185 | .dad_transmits = 1, | |
186 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
187 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
188 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
189 | #ifdef CONFIG_IPV6_PRIVACY | |
190 | .use_tempaddr = 0, | |
191 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
192 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
193 | .regen_max_retry = REGEN_MAX_RETRY, | |
194 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
195 | #endif | |
196 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 197 | .accept_ra_defrtr = 1, |
c4fd30eb | 198 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
199 | #ifdef CONFIG_IPV6_ROUTER_PREF |
200 | .accept_ra_rtr_pref = 1, | |
52e16356 | 201 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
202 | #ifdef CONFIG_IPV6_ROUTE_INFO |
203 | .accept_ra_rt_info_max_plen = 0, | |
204 | #endif | |
930d6ff2 | 205 | #endif |
1da177e4 LT |
206 | }; |
207 | ||
208 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
209 | #if 0 | |
210 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
211 | #endif | |
212 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
213 | ||
b1cacb68 YH |
214 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) |
215 | ||
216 | static inline unsigned ipv6_addr_scope2type(unsigned scope) | |
217 | { | |
218 | switch(scope) { | |
219 | case IPV6_ADDR_SCOPE_NODELOCAL: | |
220 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
221 | IPV6_ADDR_LOOPBACK); | |
222 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
223 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
224 | IPV6_ADDR_LINKLOCAL); | |
225 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
226 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
227 | IPV6_ADDR_SITELOCAL); | |
228 | } | |
229 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
230 | } | |
231 | ||
232 | int __ipv6_addr_type(const struct in6_addr *addr) | |
1da177e4 | 233 | { |
1da177e4 LT |
234 | u32 st; |
235 | ||
236 | st = addr->s6_addr32[0]; | |
237 | ||
1da177e4 | 238 | /* Consider all addresses with the first three bits different of |
b1cacb68 | 239 | 000 and 111 as unicasts. |
1da177e4 LT |
240 | */ |
241 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
242 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
b1cacb68 YH |
243 | return (IPV6_ADDR_UNICAST | |
244 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
1da177e4 | 245 | |
b1cacb68 YH |
246 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { |
247 | /* multicast */ | |
248 | /* addr-select 3.1 */ | |
249 | return (IPV6_ADDR_MULTICAST | | |
250 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
251 | } | |
252 | ||
253 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
254 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
255 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
1da177e4 | 256 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) |
b1cacb68 YH |
257 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | |
258 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
1da177e4 LT |
259 | |
260 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
261 | if (addr->s6_addr32[2] == 0) { | |
262 | if (addr->s6_addr32[3] == 0) | |
263 | return IPV6_ADDR_ANY; | |
264 | ||
265 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
b1cacb68 YH |
266 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | |
267 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
1da177e4 | 268 | |
b1cacb68 YH |
269 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | |
270 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
271 | } |
272 | ||
273 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
b1cacb68 YH |
274 | return (IPV6_ADDR_MAPPED | |
275 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
276 | } |
277 | ||
b1cacb68 YH |
278 | return (IPV6_ADDR_RESERVED | |
279 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ | |
1da177e4 LT |
280 | } |
281 | ||
282 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) | |
283 | { | |
284 | if (del_timer(&ifp->timer)) | |
285 | __in6_ifa_put(ifp); | |
286 | } | |
287 | ||
288 | enum addrconf_timer_t | |
289 | { | |
290 | AC_NONE, | |
291 | AC_DAD, | |
292 | AC_RS, | |
293 | }; | |
294 | ||
295 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
296 | enum addrconf_timer_t what, | |
297 | unsigned long when) | |
298 | { | |
299 | if (!del_timer(&ifp->timer)) | |
300 | in6_ifa_hold(ifp); | |
301 | ||
302 | switch (what) { | |
303 | case AC_DAD: | |
304 | ifp->timer.function = addrconf_dad_timer; | |
305 | break; | |
306 | case AC_RS: | |
307 | ifp->timer.function = addrconf_rs_timer; | |
308 | break; | |
309 | default:; | |
310 | } | |
311 | ifp->timer.expires = jiffies + when; | |
312 | add_timer(&ifp->timer); | |
313 | } | |
314 | ||
315 | /* Nobody refers to this device, we may destroy it. */ | |
316 | ||
317 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
318 | { | |
319 | struct net_device *dev = idev->dev; | |
320 | BUG_TRAP(idev->addr_list==NULL); | |
321 | BUG_TRAP(idev->mc_list==NULL); | |
322 | #ifdef NET_REFCNT_DEBUG | |
323 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
324 | #endif | |
325 | dev_put(dev); | |
326 | if (!idev->dead) { | |
327 | printk("Freeing alive inet6 device %p\n", idev); | |
328 | return; | |
329 | } | |
330 | snmp6_free_dev(idev); | |
331 | kfree(idev); | |
332 | } | |
333 | ||
334 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
335 | { | |
336 | struct inet6_dev *ndev; | |
337 | ||
338 | ASSERT_RTNL(); | |
339 | ||
340 | if (dev->mtu < IPV6_MIN_MTU) | |
341 | return NULL; | |
342 | ||
322f74a4 IO |
343 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
344 | ||
345 | if (ndev == NULL) | |
346 | return NULL; | |
347 | ||
348 | rwlock_init(&ndev->lock); | |
349 | ndev->dev = dev; | |
350 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
351 | ndev->cnf.mtu6 = dev->mtu; | |
352 | ndev->cnf.sysctl = NULL; | |
353 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
354 | if (ndev->nd_parms == NULL) { | |
355 | kfree(ndev); | |
356 | return NULL; | |
357 | } | |
358 | /* We refer to the device */ | |
359 | dev_hold(dev); | |
1da177e4 | 360 | |
322f74a4 IO |
361 | if (snmp6_alloc_dev(ndev) < 0) { |
362 | ADBG((KERN_WARNING | |
363 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
364 | __FUNCTION__, dev->name)); | |
365 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
366 | ndev->dead = 1; | |
367 | in6_dev_finish_destroy(ndev); | |
368 | return NULL; | |
369 | } | |
1da177e4 | 370 | |
322f74a4 IO |
371 | if (snmp6_register_dev(ndev) < 0) { |
372 | ADBG((KERN_WARNING | |
373 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
374 | __FUNCTION__, dev->name)); | |
375 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
376 | ndev->dead = 1; | |
377 | in6_dev_finish_destroy(ndev); | |
378 | return NULL; | |
379 | } | |
380 | ||
381 | /* One reference from device. We must do this before | |
382 | * we invoke __ipv6_regen_rndid(). | |
383 | */ | |
384 | in6_dev_hold(ndev); | |
1da177e4 LT |
385 | |
386 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
387 | init_timer(&ndev->regen_timer); |
388 | ndev->regen_timer.function = ipv6_regen_rndid; | |
389 | ndev->regen_timer.data = (unsigned long) ndev; | |
390 | if ((dev->flags&IFF_LOOPBACK) || | |
391 | dev->type == ARPHRD_TUNNEL || | |
392 | dev->type == ARPHRD_NONE || | |
393 | dev->type == ARPHRD_SIT) { | |
394 | printk(KERN_INFO | |
395 | "%s: Disabled Privacy Extensions\n", | |
396 | dev->name); | |
397 | ndev->cnf.use_tempaddr = -1; | |
398 | } else { | |
399 | in6_dev_hold(ndev); | |
400 | ipv6_regen_rndid((unsigned long) ndev); | |
401 | } | |
1da177e4 LT |
402 | #endif |
403 | ||
322f74a4 IO |
404 | if (netif_carrier_ok(dev)) |
405 | ndev->if_flags |= IF_READY; | |
3c21edbd | 406 | |
322f74a4 IO |
407 | write_lock_bh(&addrconf_lock); |
408 | dev->ip6_ptr = ndev; | |
409 | write_unlock_bh(&addrconf_lock); | |
1da177e4 | 410 | |
322f74a4 IO |
411 | ipv6_mc_init_dev(ndev); |
412 | ndev->tstamp = jiffies; | |
1da177e4 | 413 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
414 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
415 | NET_IPV6_NEIGH, "ipv6", | |
416 | &ndisc_ifinfo_sysctl_change, | |
417 | NULL); | |
418 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 419 | #endif |
1da177e4 LT |
420 | return ndev; |
421 | } | |
422 | ||
423 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
424 | { | |
425 | struct inet6_dev *idev; | |
426 | ||
427 | ASSERT_RTNL(); | |
428 | ||
429 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
430 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
431 | return NULL; | |
432 | } | |
c5e33bdd | 433 | |
1da177e4 LT |
434 | if (dev->flags&IFF_UP) |
435 | ipv6_mc_up(idev); | |
436 | return idev; | |
437 | } | |
438 | ||
439 | #ifdef CONFIG_SYSCTL | |
440 | static void dev_forward_change(struct inet6_dev *idev) | |
441 | { | |
442 | struct net_device *dev; | |
443 | struct inet6_ifaddr *ifa; | |
444 | struct in6_addr addr; | |
445 | ||
446 | if (!idev) | |
447 | return; | |
448 | dev = idev->dev; | |
449 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
450 | ipv6_addr_all_routers(&addr); | |
451 | ||
452 | if (idev->cnf.forwarding) | |
453 | ipv6_dev_mc_inc(dev, &addr); | |
454 | else | |
455 | ipv6_dev_mc_dec(dev, &addr); | |
456 | } | |
457 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
458 | if (idev->cnf.forwarding) | |
459 | addrconf_join_anycast(ifa); | |
460 | else | |
461 | addrconf_leave_anycast(ifa); | |
462 | } | |
463 | } | |
464 | ||
465 | ||
466 | static void addrconf_forward_change(void) | |
467 | { | |
468 | struct net_device *dev; | |
469 | struct inet6_dev *idev; | |
470 | ||
471 | read_lock(&dev_base_lock); | |
472 | for (dev=dev_base; dev; dev=dev->next) { | |
473 | read_lock(&addrconf_lock); | |
474 | idev = __in6_dev_get(dev); | |
475 | if (idev) { | |
476 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
477 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
478 | if (changed) | |
479 | dev_forward_change(idev); | |
480 | } | |
481 | read_unlock(&addrconf_lock); | |
482 | } | |
483 | read_unlock(&dev_base_lock); | |
484 | } | |
485 | #endif | |
486 | ||
487 | /* Nobody refers to this ifaddr, destroy it */ | |
488 | ||
489 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
490 | { | |
491 | BUG_TRAP(ifp->if_next==NULL); | |
492 | BUG_TRAP(ifp->lst_next==NULL); | |
493 | #ifdef NET_REFCNT_DEBUG | |
494 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
495 | #endif | |
496 | ||
497 | in6_dev_put(ifp->idev); | |
498 | ||
499 | if (del_timer(&ifp->timer)) | |
500 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
501 | ||
502 | if (!ifp->dead) { | |
503 | printk("Freeing alive inet6 address %p\n", ifp); | |
504 | return; | |
505 | } | |
506 | dst_release(&ifp->rt->u.dst); | |
507 | ||
508 | kfree(ifp); | |
509 | } | |
510 | ||
511 | /* On success it returns ifp with increased reference count */ | |
512 | ||
513 | static struct inet6_ifaddr * | |
514 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 515 | int scope, u32 flags) |
1da177e4 LT |
516 | { |
517 | struct inet6_ifaddr *ifa = NULL; | |
518 | struct rt6_info *rt; | |
519 | int hash; | |
520 | int err = 0; | |
521 | ||
522 | read_lock_bh(&addrconf_lock); | |
523 | if (idev->dead) { | |
524 | err = -ENODEV; /*XXX*/ | |
525 | goto out2; | |
526 | } | |
527 | ||
528 | write_lock(&addrconf_hash_lock); | |
529 | ||
530 | /* Ignore adding duplicate addresses on an interface */ | |
531 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
532 | ADBG(("ipv6_add_addr: already assigned\n")); | |
533 | err = -EEXIST; | |
534 | goto out; | |
535 | } | |
536 | ||
322f74a4 | 537 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
538 | |
539 | if (ifa == NULL) { | |
540 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
541 | err = -ENOBUFS; | |
542 | goto out; | |
543 | } | |
544 | ||
545 | rt = addrconf_dst_alloc(idev, addr, 0); | |
546 | if (IS_ERR(rt)) { | |
547 | err = PTR_ERR(rt); | |
548 | goto out; | |
549 | } | |
550 | ||
1da177e4 LT |
551 | ipv6_addr_copy(&ifa->addr, addr); |
552 | ||
553 | spin_lock_init(&ifa->lock); | |
554 | init_timer(&ifa->timer); | |
555 | ifa->timer.data = (unsigned long) ifa; | |
556 | ifa->scope = scope; | |
557 | ifa->prefix_len = pfxlen; | |
558 | ifa->flags = flags | IFA_F_TENTATIVE; | |
559 | ifa->cstamp = ifa->tstamp = jiffies; | |
560 | ||
561 | ifa->idev = idev; | |
562 | in6_dev_hold(idev); | |
563 | /* For caller */ | |
564 | in6_ifa_hold(ifa); | |
565 | ||
566 | /* Add to big hash table */ | |
567 | hash = ipv6_addr_hash(addr); | |
568 | ||
569 | ifa->lst_next = inet6_addr_lst[hash]; | |
570 | inet6_addr_lst[hash] = ifa; | |
571 | in6_ifa_hold(ifa); | |
572 | write_unlock(&addrconf_hash_lock); | |
573 | ||
574 | write_lock(&idev->lock); | |
575 | /* Add to inet6_dev unicast addr list. */ | |
576 | ifa->if_next = idev->addr_list; | |
577 | idev->addr_list = ifa; | |
578 | ||
579 | #ifdef CONFIG_IPV6_PRIVACY | |
580 | if (ifa->flags&IFA_F_TEMPORARY) { | |
581 | ifa->tmp_next = idev->tempaddr_list; | |
582 | idev->tempaddr_list = ifa; | |
583 | in6_ifa_hold(ifa); | |
584 | } | |
585 | #endif | |
586 | ||
587 | ifa->rt = rt; | |
588 | ||
589 | in6_ifa_hold(ifa); | |
590 | write_unlock(&idev->lock); | |
591 | out2: | |
592 | read_unlock_bh(&addrconf_lock); | |
593 | ||
fd92833a | 594 | if (likely(err == 0)) |
e041c683 | 595 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
596 | else { |
597 | kfree(ifa); | |
598 | ifa = ERR_PTR(err); | |
599 | } | |
600 | ||
601 | return ifa; | |
602 | out: | |
603 | write_unlock(&addrconf_hash_lock); | |
604 | goto out2; | |
605 | } | |
606 | ||
607 | /* This function wants to get referenced ifp and releases it before return */ | |
608 | ||
609 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
610 | { | |
611 | struct inet6_ifaddr *ifa, **ifap; | |
612 | struct inet6_dev *idev = ifp->idev; | |
613 | int hash; | |
614 | int deleted = 0, onlink = 0; | |
615 | unsigned long expires = jiffies; | |
616 | ||
617 | hash = ipv6_addr_hash(&ifp->addr); | |
618 | ||
619 | ifp->dead = 1; | |
620 | ||
621 | write_lock_bh(&addrconf_hash_lock); | |
622 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
623 | ifap = &ifa->lst_next) { | |
624 | if (ifa == ifp) { | |
625 | *ifap = ifa->lst_next; | |
626 | __in6_ifa_put(ifp); | |
627 | ifa->lst_next = NULL; | |
628 | break; | |
629 | } | |
630 | } | |
631 | write_unlock_bh(&addrconf_hash_lock); | |
632 | ||
633 | write_lock_bh(&idev->lock); | |
634 | #ifdef CONFIG_IPV6_PRIVACY | |
635 | if (ifp->flags&IFA_F_TEMPORARY) { | |
636 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
637 | ifap = &ifa->tmp_next) { | |
638 | if (ifa == ifp) { | |
639 | *ifap = ifa->tmp_next; | |
640 | if (ifp->ifpub) { | |
641 | in6_ifa_put(ifp->ifpub); | |
642 | ifp->ifpub = NULL; | |
643 | } | |
644 | __in6_ifa_put(ifp); | |
645 | ifa->tmp_next = NULL; | |
646 | break; | |
647 | } | |
648 | } | |
649 | } | |
650 | #endif | |
651 | ||
1d142804 | 652 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
653 | if (ifa == ifp) { |
654 | *ifap = ifa->if_next; | |
655 | __in6_ifa_put(ifp); | |
656 | ifa->if_next = NULL; | |
657 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
658 | break; | |
659 | deleted = 1; | |
1d142804 | 660 | continue; |
1da177e4 LT |
661 | } else if (ifp->flags & IFA_F_PERMANENT) { |
662 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
663 | ifp->prefix_len)) { | |
664 | if (ifa->flags & IFA_F_PERMANENT) { | |
665 | onlink = 1; | |
666 | if (deleted) | |
667 | break; | |
668 | } else { | |
669 | unsigned long lifetime; | |
670 | ||
671 | if (!onlink) | |
672 | onlink = -1; | |
673 | ||
674 | spin_lock(&ifa->lock); | |
675 | lifetime = min_t(unsigned long, | |
676 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
677 | if (time_before(expires, | |
678 | ifa->tstamp + lifetime * HZ)) | |
679 | expires = ifa->tstamp + lifetime * HZ; | |
680 | spin_unlock(&ifa->lock); | |
681 | } | |
682 | } | |
683 | } | |
1d142804 | 684 | ifap = &ifa->if_next; |
1da177e4 LT |
685 | } |
686 | write_unlock_bh(&idev->lock); | |
687 | ||
688 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
689 | ||
e041c683 | 690 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
691 | |
692 | addrconf_del_timer(ifp); | |
693 | ||
694 | /* | |
695 | * Purge or update corresponding prefix | |
696 | * | |
697 | * 1) we don't purge prefix here if address was not permanent. | |
698 | * prefix is managed by its own lifetime. | |
699 | * 2) if there're no addresses, delete prefix. | |
700 | * 3) if there're still other permanent address(es), | |
701 | * corresponding prefix is still permanent. | |
702 | * 4) otherwise, update prefix lifetime to the | |
703 | * longest valid lifetime among the corresponding | |
704 | * addresses on the device. | |
705 | * Note: subsequent RA will update lifetime. | |
706 | * | |
707 | * --yoshfuji | |
708 | */ | |
709 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
710 | struct in6_addr prefix; | |
711 | struct rt6_info *rt; | |
712 | ||
713 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
714 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
715 | ||
716 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
717 | if (onlink == 0) { | |
0d51aa80 | 718 | ip6_del_rt(rt, NULL, NULL, NULL); |
1da177e4 LT |
719 | rt = NULL; |
720 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
721 | rt->rt6i_expires = expires; | |
722 | rt->rt6i_flags |= RTF_EXPIRES; | |
723 | } | |
724 | } | |
725 | dst_release(&rt->u.dst); | |
726 | } | |
727 | ||
728 | in6_ifa_put(ifp); | |
729 | } | |
730 | ||
731 | #ifdef CONFIG_IPV6_PRIVACY | |
732 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
733 | { | |
734 | struct inet6_dev *idev = ifp->idev; | |
735 | struct in6_addr addr, *tmpaddr; | |
736 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
737 | int tmp_plen; | |
738 | int ret = 0; | |
739 | int max_addresses; | |
740 | ||
741 | write_lock(&idev->lock); | |
742 | if (ift) { | |
743 | spin_lock_bh(&ift->lock); | |
744 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
745 | spin_unlock_bh(&ift->lock); | |
746 | tmpaddr = &addr; | |
747 | } else { | |
748 | tmpaddr = NULL; | |
749 | } | |
750 | retry: | |
751 | in6_dev_hold(idev); | |
752 | if (idev->cnf.use_tempaddr <= 0) { | |
753 | write_unlock(&idev->lock); | |
754 | printk(KERN_INFO | |
755 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
756 | in6_dev_put(idev); | |
757 | ret = -1; | |
758 | goto out; | |
759 | } | |
760 | spin_lock_bh(&ifp->lock); | |
761 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
762 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
763 | spin_unlock_bh(&ifp->lock); | |
764 | write_unlock(&idev->lock); | |
765 | printk(KERN_WARNING | |
766 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
767 | in6_dev_put(idev); | |
768 | ret = -1; | |
769 | goto out; | |
770 | } | |
771 | in6_ifa_hold(ifp); | |
772 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
773 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
774 | spin_unlock_bh(&ifp->lock); | |
775 | write_unlock(&idev->lock); | |
776 | printk(KERN_WARNING | |
777 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
778 | in6_ifa_put(ifp); | |
779 | in6_dev_put(idev); | |
780 | ret = -1; | |
781 | goto out; | |
782 | } | |
783 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
784 | tmp_valid_lft = min_t(__u32, | |
785 | ifp->valid_lft, | |
786 | idev->cnf.temp_valid_lft); | |
787 | tmp_prefered_lft = min_t(__u32, | |
788 | ifp->prefered_lft, | |
789 | idev->cnf.temp_prefered_lft - desync_factor / HZ); | |
790 | tmp_plen = ifp->prefix_len; | |
791 | max_addresses = idev->cnf.max_addresses; | |
792 | tmp_cstamp = ifp->cstamp; | |
793 | tmp_tstamp = ifp->tstamp; | |
794 | spin_unlock_bh(&ifp->lock); | |
795 | ||
796 | write_unlock(&idev->lock); | |
797 | ift = !max_addresses || | |
798 | ipv6_count_addresses(idev) < max_addresses ? | |
799 | ipv6_add_addr(idev, &addr, tmp_plen, | |
800 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
801 | if (!ift || IS_ERR(ift)) { | |
802 | in6_ifa_put(ifp); | |
803 | in6_dev_put(idev); | |
804 | printk(KERN_INFO | |
805 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
806 | tmpaddr = &addr; | |
807 | write_lock(&idev->lock); | |
808 | goto retry; | |
809 | } | |
810 | ||
811 | spin_lock_bh(&ift->lock); | |
812 | ift->ifpub = ifp; | |
813 | ift->valid_lft = tmp_valid_lft; | |
814 | ift->prefered_lft = tmp_prefered_lft; | |
815 | ift->cstamp = tmp_cstamp; | |
816 | ift->tstamp = tmp_tstamp; | |
817 | spin_unlock_bh(&ift->lock); | |
818 | ||
819 | addrconf_dad_start(ift, 0); | |
820 | in6_ifa_put(ift); | |
821 | in6_dev_put(idev); | |
822 | out: | |
823 | return ret; | |
824 | } | |
825 | #endif | |
826 | ||
827 | /* | |
072047e4 | 828 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 829 | */ |
072047e4 YH |
830 | struct ipv6_saddr_score { |
831 | int addr_type; | |
832 | unsigned int attrs; | |
833 | int matchlen; | |
0d27b427 | 834 | int scope; |
072047e4 YH |
835 | unsigned int rule; |
836 | }; | |
837 | ||
838 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
839 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
840 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
841 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
842 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
843 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
844 | ||
845 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 846 | { |
072047e4 YH |
847 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
848 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
849 | return 1; | |
850 | return 0; | |
1da177e4 LT |
851 | } |
852 | ||
072047e4 YH |
853 | /* static matching label */ |
854 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
855 | { | |
856 | /* | |
857 | * prefix (longest match) label | |
858 | * ----------------------------- | |
859 | * ::1/128 0 | |
860 | * ::/0 1 | |
861 | * 2002::/16 2 | |
862 | * ::/96 3 | |
863 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
864 | * fc00::/7 5 |
865 | * 2001::/32 6 | |
072047e4 YH |
866 | */ |
867 | if (type & IPV6_ADDR_LOOPBACK) | |
868 | return 0; | |
869 | else if (type & IPV6_ADDR_COMPATv4) | |
870 | return 3; | |
871 | else if (type & IPV6_ADDR_MAPPED) | |
872 | return 4; | |
102128e3 ŁS |
873 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
874 | return 6; | |
072047e4 YH |
875 | else if (addr->s6_addr16[0] == htons(0x2002)) |
876 | return 2; | |
102128e3 ŁS |
877 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
878 | return 5; | |
072047e4 YH |
879 | return 1; |
880 | } | |
1da177e4 | 881 | |
072047e4 | 882 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
883 | struct in6_addr *daddr, struct in6_addr *saddr) |
884 | { | |
072047e4 YH |
885 | struct ipv6_saddr_score hiscore; |
886 | struct inet6_ifaddr *ifa_result = NULL; | |
887 | int daddr_type = __ipv6_addr_type(daddr); | |
888 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
889 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
890 | struct net_device *dev; | |
1da177e4 | 891 | |
072047e4 | 892 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 893 | |
072047e4 YH |
894 | read_lock(&dev_base_lock); |
895 | read_lock(&addrconf_lock); | |
1da177e4 | 896 | |
072047e4 YH |
897 | for (dev = dev_base; dev; dev=dev->next) { |
898 | struct inet6_dev *idev; | |
899 | struct inet6_ifaddr *ifa; | |
900 | ||
901 | /* Rule 0: Candidate Source Address (section 4) | |
902 | * - multicast and link-local destination address, | |
903 | * the set of candidate source address MUST only | |
904 | * include addresses assigned to interfaces | |
905 | * belonging to the same link as the outgoing | |
906 | * interface. | |
907 | * (- For site-local destination addresses, the | |
908 | * set of candidate source addresses MUST only | |
909 | * include addresses assigned to interfaces | |
910 | * belonging to the same site as the outgoing | |
911 | * interface.) | |
912 | */ | |
913 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
914 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
915 | daddr_dev && dev != daddr_dev) | |
916 | continue; | |
1da177e4 | 917 | |
1da177e4 | 918 | idev = __in6_dev_get(dev); |
072047e4 YH |
919 | if (!idev) |
920 | continue; | |
921 | ||
922 | read_lock_bh(&idev->lock); | |
923 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
924 | struct ipv6_saddr_score score; | |
925 | ||
926 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
927 | ||
6b3ae80a YH |
928 | /* Rule 0: |
929 | * - Tentative Address (RFC2462 section 5.4) | |
930 | * - A tentative address is not considered | |
931 | * "assigned to an interface" in the traditional | |
932 | * sense. | |
933 | * - Candidate Source Address (section 4) | |
072047e4 YH |
934 | * - In any case, anycast addresses, multicast |
935 | * addresses, and the unspecified address MUST | |
936 | * NOT be included in a candidate set. | |
937 | */ | |
6b3ae80a YH |
938 | if (ifa->flags & IFA_F_TENTATIVE) |
939 | continue; | |
072047e4 YH |
940 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
941 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
942 | LIMIT_NETDEBUG(KERN_DEBUG | |
943 | "ADDRCONF: unspecified / multicast address" | |
944 | "assigned as unicast address on %s", | |
945 | dev->name); | |
946 | continue; | |
947 | } | |
948 | ||
949 | score.attrs = 0; | |
950 | score.matchlen = 0; | |
951 | score.scope = 0; | |
952 | score.rule = 0; | |
953 | ||
954 | if (ifa_result == NULL) { | |
955 | /* record it if the first available entry */ | |
956 | goto record_it; | |
957 | } | |
958 | ||
959 | /* Rule 1: Prefer same address */ | |
960 | if (hiscore.rule < 1) { | |
961 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
962 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
963 | hiscore.rule++; | |
964 | } | |
965 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
966 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
967 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
968 | score.rule = 1; | |
969 | goto record_it; | |
1da177e4 | 970 | } |
072047e4 YH |
971 | } else { |
972 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
973 | continue; | |
1da177e4 | 974 | } |
1da177e4 | 975 | |
072047e4 YH |
976 | /* Rule 2: Prefer appropriate scope */ |
977 | if (hiscore.rule < 2) { | |
978 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
979 | hiscore.rule++; | |
980 | } | |
981 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
982 | if (hiscore.scope < score.scope) { | |
983 | if (hiscore.scope < daddr_scope) { | |
984 | score.rule = 2; | |
985 | goto record_it; | |
986 | } else | |
987 | continue; | |
988 | } else if (score.scope < hiscore.scope) { | |
989 | if (score.scope < daddr_scope) | |
990 | continue; | |
991 | else { | |
992 | score.rule = 2; | |
993 | goto record_it; | |
994 | } | |
995 | } | |
1da177e4 | 996 | |
072047e4 YH |
997 | /* Rule 3: Avoid deprecated address */ |
998 | if (hiscore.rule < 3) { | |
999 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
1000 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
1001 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1002 | hiscore.rule++; | |
1003 | } | |
1004 | if (ipv6_saddr_preferred(score.addr_type) || | |
1005 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
1006 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1007 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1008 | score.rule = 3; | |
1009 | goto record_it; | |
1010 | } | |
1011 | } else { | |
1012 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1013 | continue; | |
1014 | } | |
1da177e4 | 1015 | |
072047e4 | 1016 | /* Rule 4: Prefer home address -- not implemented yet */ |
220bbd74 YH |
1017 | if (hiscore.rule < 4) |
1018 | hiscore.rule++; | |
072047e4 YH |
1019 | |
1020 | /* Rule 5: Prefer outgoing interface */ | |
1021 | if (hiscore.rule < 5) { | |
1022 | if (daddr_dev == NULL || | |
1023 | daddr_dev == ifa_result->idev->dev) | |
1024 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1025 | hiscore.rule++; | |
1026 | } | |
1027 | if (daddr_dev == NULL || | |
1028 | daddr_dev == ifa->idev->dev) { | |
1029 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1030 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1031 | score.rule = 5; | |
1032 | goto record_it; | |
1033 | } | |
1034 | } else { | |
1035 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1036 | continue; | |
1037 | } | |
1038 | ||
1039 | /* Rule 6: Prefer matching label */ | |
1040 | if (hiscore.rule < 6) { | |
1041 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1042 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1043 | hiscore.rule++; | |
1044 | } | |
1045 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1046 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1047 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1048 | score.rule = 6; | |
1049 | goto record_it; | |
1da177e4 | 1050 | } |
072047e4 YH |
1051 | } else { |
1052 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1053 | continue; | |
1054 | } | |
1055 | ||
44fd0261 | 1056 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1057 | /* Rule 7: Prefer public address |
1058 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1059 | */ | |
1060 | if (hiscore.rule < 7) { | |
1061 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1062 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1063 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1064 | hiscore.rule++; | |
1065 | } | |
1066 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1067 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1068 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1069 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1070 | score.rule = 7; | |
1071 | goto record_it; | |
1072 | } | |
1073 | } else { | |
1074 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1075 | continue; | |
1076 | } | |
5e2707fa YH |
1077 | #else |
1078 | if (hiscore.rule < 7) | |
1079 | hiscore.rule++; | |
44fd0261 | 1080 | #endif |
072047e4 | 1081 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1082 | if (hiscore.rule < 8) { |
072047e4 | 1083 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1084 | hiscore.rule++; |
1085 | } | |
072047e4 YH |
1086 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1087 | if (score.matchlen > hiscore.matchlen) { | |
1088 | score.rule = 8; | |
1089 | goto record_it; | |
1da177e4 | 1090 | } |
072047e4 YH |
1091 | #if 0 |
1092 | else if (score.matchlen < hiscore.matchlen) | |
1093 | continue; | |
1094 | #endif | |
1095 | ||
1096 | /* Final Rule: choose first available one */ | |
1097 | continue; | |
1098 | record_it: | |
1099 | if (ifa_result) | |
1100 | in6_ifa_put(ifa_result); | |
1101 | in6_ifa_hold(ifa); | |
1102 | ifa_result = ifa; | |
1103 | hiscore = score; | |
1da177e4 | 1104 | } |
072047e4 | 1105 | read_unlock_bh(&idev->lock); |
1da177e4 | 1106 | } |
1da177e4 LT |
1107 | read_unlock(&addrconf_lock); |
1108 | read_unlock(&dev_base_lock); | |
1109 | ||
072047e4 YH |
1110 | if (!ifa_result) |
1111 | return -EADDRNOTAVAIL; | |
1112 | ||
1113 | ipv6_addr_copy(saddr, &ifa_result->addr); | |
1114 | in6_ifa_put(ifa_result); | |
1115 | return 0; | |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | ||
1119 | int ipv6_get_saddr(struct dst_entry *dst, | |
1120 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1121 | { | |
1122 | return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr); | |
1123 | } | |
1124 | ||
1125 | ||
1126 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1127 | { | |
1128 | struct inet6_dev *idev; | |
1129 | int err = -EADDRNOTAVAIL; | |
1130 | ||
1131 | read_lock(&addrconf_lock); | |
1132 | if ((idev = __in6_dev_get(dev)) != NULL) { | |
1133 | struct inet6_ifaddr *ifp; | |
1134 | ||
1135 | read_lock_bh(&idev->lock); | |
1136 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1137 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1138 | ipv6_addr_copy(addr, &ifp->addr); | |
1139 | err = 0; | |
1140 | break; | |
1141 | } | |
1142 | } | |
1143 | read_unlock_bh(&idev->lock); | |
1144 | } | |
1145 | read_unlock(&addrconf_lock); | |
1146 | return err; | |
1147 | } | |
1148 | ||
1149 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1150 | { | |
1151 | int cnt = 0; | |
1152 | struct inet6_ifaddr *ifp; | |
1153 | ||
1154 | read_lock_bh(&idev->lock); | |
1155 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1156 | cnt++; | |
1157 | read_unlock_bh(&idev->lock); | |
1158 | return cnt; | |
1159 | } | |
1160 | ||
1161 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1162 | { | |
1163 | struct inet6_ifaddr * ifp; | |
1164 | u8 hash = ipv6_addr_hash(addr); | |
1165 | ||
1166 | read_lock_bh(&addrconf_hash_lock); | |
1167 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1168 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1169 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1170 | if (dev == NULL || ifp->idev->dev == dev || | |
1171 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1172 | break; | |
1173 | } | |
1174 | } | |
1175 | read_unlock_bh(&addrconf_hash_lock); | |
1176 | return ifp != NULL; | |
1177 | } | |
1178 | ||
1179 | static | |
1180 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1181 | { | |
1182 | struct inet6_ifaddr * ifp; | |
1183 | u8 hash = ipv6_addr_hash(addr); | |
1184 | ||
1185 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1186 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1187 | if (dev == NULL || ifp->idev->dev == dev) | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | return ifp != NULL; | |
1192 | } | |
1193 | ||
1194 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1195 | { | |
1196 | struct inet6_ifaddr * ifp; | |
1197 | u8 hash = ipv6_addr_hash(addr); | |
1198 | ||
1199 | read_lock_bh(&addrconf_hash_lock); | |
1200 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1201 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1202 | if (dev == NULL || ifp->idev->dev == dev || | |
1203 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1204 | in6_ifa_hold(ifp); | |
1205 | break; | |
1206 | } | |
1207 | } | |
1208 | } | |
1209 | read_unlock_bh(&addrconf_hash_lock); | |
1210 | ||
1211 | return ifp; | |
1212 | } | |
1213 | ||
1214 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1215 | { | |
1216 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1217 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
1da177e4 | 1218 | u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
8feaf0c0 | 1219 | u32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
1da177e4 | 1220 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1221 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1222 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1223 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1224 | ||
1225 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1226 | return 1; | |
1227 | ||
1228 | if (addr_type2 == IPV6_ADDR_ANY && | |
1229 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1230 | return 1; | |
1231 | ||
1232 | if (addr_type == IPV6_ADDR_ANY && | |
1233 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1234 | return 1; | |
1235 | ||
1236 | if (sk2_rcv_saddr6 && | |
1237 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1238 | return 1; | |
1239 | ||
1240 | if (addr_type == IPV6_ADDR_MAPPED && | |
1241 | !sk2_ipv6only && | |
1242 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1243 | return 1; | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | /* Gets referenced address, destroys ifaddr */ | |
1249 | ||
9f5336e2 | 1250 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1251 | { |
1da177e4 LT |
1252 | if (ifp->flags&IFA_F_PERMANENT) { |
1253 | spin_lock_bh(&ifp->lock); | |
1254 | addrconf_del_timer(ifp); | |
1255 | ifp->flags |= IFA_F_TENTATIVE; | |
1256 | spin_unlock_bh(&ifp->lock); | |
1257 | in6_ifa_put(ifp); | |
1258 | #ifdef CONFIG_IPV6_PRIVACY | |
1259 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1260 | struct inet6_ifaddr *ifpub; | |
1261 | spin_lock_bh(&ifp->lock); | |
1262 | ifpub = ifp->ifpub; | |
1263 | if (ifpub) { | |
1264 | in6_ifa_hold(ifpub); | |
1265 | spin_unlock_bh(&ifp->lock); | |
1266 | ipv6_create_tempaddr(ifpub, ifp); | |
1267 | in6_ifa_put(ifpub); | |
1268 | } else { | |
1269 | spin_unlock_bh(&ifp->lock); | |
1270 | } | |
1271 | ipv6_del_addr(ifp); | |
1272 | #endif | |
1273 | } else | |
1274 | ipv6_del_addr(ifp); | |
1275 | } | |
1276 | ||
3c21edbd YH |
1277 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1278 | { | |
1279 | if (net_ratelimit()) | |
1280 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1281 | addrconf_dad_stop(ifp); | |
1282 | } | |
1da177e4 LT |
1283 | |
1284 | /* Join to solicited addr multicast group. */ | |
1285 | ||
1286 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1287 | { | |
1288 | struct in6_addr maddr; | |
1289 | ||
1290 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1291 | return; | |
1292 | ||
1293 | addrconf_addr_solict_mult(addr, &maddr); | |
1294 | ipv6_dev_mc_inc(dev, &maddr); | |
1295 | } | |
1296 | ||
1297 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1298 | { | |
1299 | struct in6_addr maddr; | |
1300 | ||
1301 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1302 | return; | |
1303 | ||
1304 | addrconf_addr_solict_mult(addr, &maddr); | |
1305 | __ipv6_dev_mc_dec(idev, &maddr); | |
1306 | } | |
1307 | ||
20380731 | 1308 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1309 | { |
1310 | struct in6_addr addr; | |
1311 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1312 | if (ipv6_addr_any(&addr)) | |
1313 | return; | |
1314 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1315 | } | |
1316 | ||
20380731 | 1317 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1318 | { |
1319 | struct in6_addr addr; | |
1320 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1321 | if (ipv6_addr_any(&addr)) | |
1322 | return; | |
1323 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1324 | } | |
1325 | ||
073a8e0e YH |
1326 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1327 | { | |
1328 | if (dev->addr_len != ETH_ALEN) | |
1329 | return -1; | |
1330 | memcpy(eui, dev->dev_addr, 3); | |
1331 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1332 | ||
1333 | /* | |
1334 | * The zSeries OSA network cards can be shared among various | |
1335 | * OS instances, but the OSA cards have only one MAC address. | |
1336 | * This leads to duplicate address conflicts in conjunction | |
1337 | * with IPv6 if more than one instance uses the same card. | |
1338 | * | |
1339 | * The driver for these cards can deliver a unique 16-bit | |
1340 | * identifier for each instance sharing the same card. It is | |
1341 | * placed instead of 0xFFFE in the interface identifier. The | |
1342 | * "u" bit of the interface identifier is not inverted in this | |
1343 | * case. Hence the resulting interface identifier has local | |
1344 | * scope according to RFC2373. | |
1345 | */ | |
1346 | if (dev->dev_id) { | |
1347 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1348 | eui[4] = dev->dev_id & 0xFF; | |
1349 | } else { | |
1350 | eui[3] = 0xFF; | |
1351 | eui[4] = 0xFE; | |
1352 | eui[0] ^= 2; | |
1353 | } | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1358 | { | |
1359 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1360 | if (dev->addr_len != ARCNET_ALEN) | |
1361 | return -1; | |
1362 | memset(eui, 0, 7); | |
1363 | eui[7] = *(u8*)dev->dev_addr; | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1368 | { | |
1369 | if (dev->addr_len != INFINIBAND_ALEN) | |
1370 | return -1; | |
1371 | memcpy(eui, dev->dev_addr + 12, 8); | |
1372 | eui[0] |= 2; | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1da177e4 LT |
1376 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1377 | { | |
1378 | switch (dev->type) { | |
1379 | case ARPHRD_ETHER: | |
1380 | case ARPHRD_FDDI: | |
1381 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1382 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1383 | case ARPHRD_ARCNET: |
073a8e0e | 1384 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1385 | case ARPHRD_INFINIBAND: |
073a8e0e | 1386 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1387 | } |
1388 | return -1; | |
1389 | } | |
1390 | ||
1391 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1392 | { | |
1393 | int err = -1; | |
1394 | struct inet6_ifaddr *ifp; | |
1395 | ||
1396 | read_lock_bh(&idev->lock); | |
1397 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1398 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1399 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1400 | err = 0; | |
1401 | break; | |
1402 | } | |
1403 | } | |
1404 | read_unlock_bh(&idev->lock); | |
1405 | return err; | |
1406 | } | |
1407 | ||
1408 | #ifdef CONFIG_IPV6_PRIVACY | |
1409 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1410 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1411 | { | |
1da177e4 | 1412 | regen: |
955189ef | 1413 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1414 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1415 | |
1416 | /* | |
1417 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1418 | * check if generated address is not inappropriate | |
1419 | * | |
1420 | * - Reserved subnet anycast (RFC 2526) | |
1421 | * 11111101 11....11 1xxxxxxx | |
1422 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1423 | * 00-00-5E-FE-xx-xx-xx-xx | |
1424 | * - value 0 | |
1425 | * - XXX: already assigned to an address on the device | |
1426 | */ | |
1427 | if (idev->rndid[0] == 0xfd && | |
1428 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && | |
1429 | (idev->rndid[7]&0x80)) | |
1430 | goto regen; | |
1431 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1432 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1433 | goto regen; | |
1434 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1435 | goto regen; | |
1436 | } | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | static void ipv6_regen_rndid(unsigned long data) | |
1442 | { | |
1443 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1444 | unsigned long expires; | |
1445 | ||
1446 | read_lock_bh(&addrconf_lock); | |
1447 | write_lock_bh(&idev->lock); | |
1448 | ||
1449 | if (idev->dead) | |
1450 | goto out; | |
1451 | ||
1452 | if (__ipv6_regen_rndid(idev) < 0) | |
1453 | goto out; | |
1454 | ||
1455 | expires = jiffies + | |
1456 | idev->cnf.temp_prefered_lft * HZ - | |
1457 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; | |
1458 | if (time_before(expires, jiffies)) { | |
1459 | printk(KERN_WARNING | |
1460 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1461 | idev->dev->name); | |
1462 | goto out; | |
1463 | } | |
1464 | ||
1465 | if (!mod_timer(&idev->regen_timer, expires)) | |
1466 | in6_dev_hold(idev); | |
1467 | ||
1468 | out: | |
1469 | write_unlock_bh(&idev->lock); | |
1470 | read_unlock_bh(&addrconf_lock); | |
1471 | in6_dev_put(idev); | |
1472 | } | |
1473 | ||
1474 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1475 | int ret = 0; | |
1476 | ||
1477 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1478 | ret = __ipv6_regen_rndid(idev); | |
1479 | return ret; | |
1480 | } | |
1481 | #endif | |
1482 | ||
1483 | /* | |
1484 | * Add prefix route. | |
1485 | */ | |
1486 | ||
1487 | static void | |
1488 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1489 | unsigned long expires, u32 flags) |
1da177e4 LT |
1490 | { |
1491 | struct in6_rtmsg rtmsg; | |
1492 | ||
1493 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1494 | ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx); | |
1495 | rtmsg.rtmsg_dst_len = plen; | |
1496 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1497 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1498 | rtmsg.rtmsg_info = expires; | |
1499 | rtmsg.rtmsg_flags = RTF_UP|flags; | |
1500 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1501 | ||
1502 | /* Prevent useless cloning on PtP SIT. | |
1503 | This thing is done here expecting that the whole | |
1504 | class of non-broadcast devices need not cloning. | |
1505 | */ | |
1506 | if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT)) | |
1507 | rtmsg.rtmsg_flags |= RTF_NONEXTHOP; | |
1508 | ||
0d51aa80 | 1509 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1510 | } |
1511 | ||
1512 | /* Create "default" multicast route to the interface */ | |
1513 | ||
1514 | static void addrconf_add_mroute(struct net_device *dev) | |
1515 | { | |
1516 | struct in6_rtmsg rtmsg; | |
1517 | ||
1518 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1519 | ipv6_addr_set(&rtmsg.rtmsg_dst, | |
1520 | htonl(0xFF000000), 0, 0, 0); | |
1521 | rtmsg.rtmsg_dst_len = 8; | |
1522 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1523 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1524 | rtmsg.rtmsg_flags = RTF_UP; | |
1525 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
0d51aa80 | 1526 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | static void sit_route_add(struct net_device *dev) | |
1530 | { | |
1531 | struct in6_rtmsg rtmsg; | |
1532 | ||
1533 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1534 | ||
1535 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1536 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1537 | ||
1538 | /* prefix length - 96 bits "::d.d.d.d" */ | |
1539 | rtmsg.rtmsg_dst_len = 96; | |
1540 | rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP; | |
1541 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1542 | ||
0d51aa80 | 1543 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
1da177e4 LT |
1544 | } |
1545 | ||
1546 | static void addrconf_add_lroute(struct net_device *dev) | |
1547 | { | |
1548 | struct in6_addr addr; | |
1549 | ||
1550 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1551 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1552 | } | |
1553 | ||
1554 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1555 | { | |
1556 | struct inet6_dev *idev; | |
1557 | ||
1558 | ASSERT_RTNL(); | |
1559 | ||
1560 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1561 | return NULL; | |
1562 | ||
1563 | /* Add default multicast route */ | |
1564 | addrconf_add_mroute(dev); | |
1565 | ||
1566 | /* Add link local route */ | |
1567 | addrconf_add_lroute(dev); | |
1568 | return idev; | |
1569 | } | |
1570 | ||
1571 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1572 | { | |
1573 | struct prefix_info *pinfo; | |
1574 | __u32 valid_lft; | |
1575 | __u32 prefered_lft; | |
1576 | int addr_type; | |
1577 | unsigned long rt_expires; | |
1578 | struct inet6_dev *in6_dev; | |
1579 | ||
1580 | pinfo = (struct prefix_info *) opt; | |
1581 | ||
1582 | if (len < sizeof(struct prefix_info)) { | |
1583 | ADBG(("addrconf: prefix option too short\n")); | |
1584 | return; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * Validation checks ([ADDRCONF], page 19) | |
1589 | */ | |
1590 | ||
1591 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1592 | ||
1593 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1594 | return; | |
1595 | ||
1596 | valid_lft = ntohl(pinfo->valid); | |
1597 | prefered_lft = ntohl(pinfo->prefered); | |
1598 | ||
1599 | if (prefered_lft > valid_lft) { | |
1600 | if (net_ratelimit()) | |
1601 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1602 | return; | |
1603 | } | |
1604 | ||
1605 | in6_dev = in6_dev_get(dev); | |
1606 | ||
1607 | if (in6_dev == NULL) { | |
1608 | if (net_ratelimit()) | |
1609 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1610 | return; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * Two things going on here: | |
1615 | * 1) Add routes for on-link prefixes | |
1616 | * 2) Configure prefixes with the auto flag set | |
1617 | */ | |
1618 | ||
1619 | /* Avoid arithmetic overflow. Really, we could | |
1620 | save rt_expires in seconds, likely valid_lft, | |
1621 | but it would require division in fib gc, that it | |
1622 | not good. | |
1623 | */ | |
1624 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1625 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1626 | else |
3dd4bc68 YH |
1627 | rt_expires = valid_lft * HZ; |
1628 | ||
1629 | /* | |
1630 | * We convert this (in jiffies) to clock_t later. | |
1631 | * Avoid arithmetic overflow there as well. | |
1632 | * Overflow can happen only if HZ < USER_HZ. | |
1633 | */ | |
1634 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1635 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1636 | |
1637 | if (pinfo->onlink) { | |
1638 | struct rt6_info *rt; | |
1639 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1640 | ||
1641 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1642 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1643 | if (valid_lft == 0) { | |
0d51aa80 | 1644 | ip6_del_rt(rt, NULL, NULL, NULL); |
1da177e4 LT |
1645 | rt = NULL; |
1646 | } else { | |
3dd4bc68 | 1647 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1648 | } |
1649 | } | |
1650 | } else if (valid_lft) { | |
1651 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1652 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1653 | } |
1654 | if (rt) | |
1655 | dst_release(&rt->u.dst); | |
1656 | } | |
1657 | ||
1658 | /* Try to figure out our local address for this prefix */ | |
1659 | ||
1660 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1661 | struct inet6_ifaddr * ifp; | |
1662 | struct in6_addr addr; | |
1663 | int create = 0, update_lft = 0; | |
1664 | ||
1665 | if (pinfo->prefix_len == 64) { | |
1666 | memcpy(&addr, &pinfo->prefix, 8); | |
1667 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1668 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1669 | in6_dev_put(in6_dev); | |
1670 | return; | |
1671 | } | |
1672 | goto ok; | |
1673 | } | |
1674 | if (net_ratelimit()) | |
1675 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1676 | pinfo->prefix_len); | |
1677 | in6_dev_put(in6_dev); | |
1678 | return; | |
1679 | ||
1680 | ok: | |
1681 | ||
1682 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1683 | ||
1684 | if (ifp == NULL && valid_lft) { | |
1685 | int max_addresses = in6_dev->cnf.max_addresses; | |
1686 | ||
1687 | /* Do not allow to create too much of autoconfigured | |
1688 | * addresses; this would be too easy way to crash kernel. | |
1689 | */ | |
1690 | if (!max_addresses || | |
1691 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1692 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1693 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1694 | ||
1695 | if (!ifp || IS_ERR(ifp)) { | |
1696 | in6_dev_put(in6_dev); | |
1697 | return; | |
1698 | } | |
1699 | ||
1700 | update_lft = create = 1; | |
1701 | ifp->cstamp = jiffies; | |
1702 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1703 | } | |
1704 | ||
1705 | if (ifp) { | |
1706 | int flags; | |
1707 | unsigned long now; | |
1708 | #ifdef CONFIG_IPV6_PRIVACY | |
1709 | struct inet6_ifaddr *ift; | |
1710 | #endif | |
1711 | u32 stored_lft; | |
1712 | ||
1713 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1714 | spin_lock(&ifp->lock); | |
1715 | now = jiffies; | |
1716 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1717 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1718 | else | |
1719 | stored_lft = 0; | |
1720 | if (!update_lft && stored_lft) { | |
1721 | if (valid_lft > MIN_VALID_LIFETIME || | |
1722 | valid_lft > stored_lft) | |
1723 | update_lft = 1; | |
1724 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1725 | /* valid_lft <= stored_lft is always true */ | |
1726 | /* XXX: IPsec */ | |
1727 | update_lft = 0; | |
1728 | } else { | |
1729 | valid_lft = MIN_VALID_LIFETIME; | |
1730 | if (valid_lft < prefered_lft) | |
1731 | prefered_lft = valid_lft; | |
1732 | update_lft = 1; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | if (update_lft) { | |
1737 | ifp->valid_lft = valid_lft; | |
1738 | ifp->prefered_lft = prefered_lft; | |
1739 | ifp->tstamp = now; | |
1740 | flags = ifp->flags; | |
1741 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1742 | spin_unlock(&ifp->lock); | |
1743 | ||
1744 | if (!(flags&IFA_F_TENTATIVE)) | |
1745 | ipv6_ifa_notify(0, ifp); | |
1746 | } else | |
1747 | spin_unlock(&ifp->lock); | |
1748 | ||
1749 | #ifdef CONFIG_IPV6_PRIVACY | |
1750 | read_lock_bh(&in6_dev->lock); | |
1751 | /* update all temporary addresses in the list */ | |
1752 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1753 | /* | |
1754 | * When adjusting the lifetimes of an existing | |
1755 | * temporary address, only lower the lifetimes. | |
1756 | * Implementations must not increase the | |
1757 | * lifetimes of an existing temporary address | |
1758 | * when processing a Prefix Information Option. | |
1759 | */ | |
1760 | spin_lock(&ift->lock); | |
1761 | flags = ift->flags; | |
1762 | if (ift->valid_lft > valid_lft && | |
1763 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1764 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1765 | if (ift->prefered_lft > prefered_lft && | |
1766 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1767 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1768 | spin_unlock(&ift->lock); | |
1769 | if (!(flags&IFA_F_TENTATIVE)) | |
1770 | ipv6_ifa_notify(0, ift); | |
1771 | } | |
1772 | ||
1773 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1774 | /* | |
1775 | * When a new public address is created as described in [ADDRCONF], | |
1776 | * also create a new temporary address. | |
1777 | */ | |
1778 | read_unlock_bh(&in6_dev->lock); | |
1779 | ipv6_create_tempaddr(ifp, NULL); | |
1780 | } else { | |
1781 | read_unlock_bh(&in6_dev->lock); | |
1782 | } | |
1783 | #endif | |
1784 | in6_ifa_put(ifp); | |
1785 | addrconf_verify(0); | |
1786 | } | |
1787 | } | |
1788 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1789 | in6_dev_put(in6_dev); | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Set destination address. | |
1794 | * Special case for SIT interfaces where we create a new "virtual" | |
1795 | * device. | |
1796 | */ | |
1797 | int addrconf_set_dstaddr(void __user *arg) | |
1798 | { | |
1799 | struct in6_ifreq ireq; | |
1800 | struct net_device *dev; | |
1801 | int err = -EINVAL; | |
1802 | ||
1803 | rtnl_lock(); | |
1804 | ||
1805 | err = -EFAULT; | |
1806 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1807 | goto err_exit; | |
1808 | ||
1809 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1810 | ||
1811 | err = -ENODEV; | |
1812 | if (dev == NULL) | |
1813 | goto err_exit; | |
1814 | ||
1815 | if (dev->type == ARPHRD_SIT) { | |
1816 | struct ifreq ifr; | |
1817 | mm_segment_t oldfs; | |
1818 | struct ip_tunnel_parm p; | |
1819 | ||
1820 | err = -EADDRNOTAVAIL; | |
1821 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1822 | goto err_exit; | |
1823 | ||
1824 | memset(&p, 0, sizeof(p)); | |
1825 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1826 | p.iph.saddr = 0; | |
1827 | p.iph.version = 4; | |
1828 | p.iph.ihl = 5; | |
1829 | p.iph.protocol = IPPROTO_IPV6; | |
1830 | p.iph.ttl = 64; | |
1831 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1832 | ||
1833 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1834 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1835 | set_fs(oldfs); | |
1836 | ||
1837 | if (err == 0) { | |
1838 | err = -ENOBUFS; | |
1839 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1840 | goto err_exit; | |
1841 | err = dev_open(dev); | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | err_exit: | |
1846 | rtnl_unlock(); | |
1847 | return err; | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * Manual configuration of address on an interface | |
1852 | */ | |
1853 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen) | |
1854 | { | |
1855 | struct inet6_ifaddr *ifp; | |
1856 | struct inet6_dev *idev; | |
1857 | struct net_device *dev; | |
1858 | int scope; | |
1859 | ||
1860 | ASSERT_RTNL(); | |
1861 | ||
1862 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1863 | return -ENODEV; | |
1864 | ||
1865 | if (!(dev->flags&IFF_UP)) | |
1866 | return -ENETDOWN; | |
1867 | ||
1868 | if ((idev = addrconf_add_dev(dev)) == NULL) | |
1869 | return -ENOBUFS; | |
1870 | ||
1871 | scope = ipv6_addr_scope(pfx); | |
1872 | ||
1873 | ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT); | |
1874 | if (!IS_ERR(ifp)) { | |
1875 | addrconf_dad_start(ifp, 0); | |
1876 | in6_ifa_put(ifp); | |
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | return PTR_ERR(ifp); | |
1881 | } | |
1882 | ||
1883 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1884 | { | |
1885 | struct inet6_ifaddr *ifp; | |
1886 | struct inet6_dev *idev; | |
1887 | struct net_device *dev; | |
1888 | ||
1889 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1890 | return -ENODEV; | |
1891 | ||
1892 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1893 | return -ENXIO; | |
1894 | ||
1895 | read_lock_bh(&idev->lock); | |
1896 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1897 | if (ifp->prefix_len == plen && | |
1898 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1899 | in6_ifa_hold(ifp); | |
1900 | read_unlock_bh(&idev->lock); | |
1901 | ||
1902 | ipv6_del_addr(ifp); | |
1903 | ||
1904 | /* If the last address is deleted administratively, | |
1905 | disable IPv6 on this interface. | |
1906 | */ | |
1907 | if (idev->addr_list == NULL) | |
1908 | addrconf_ifdown(idev->dev, 1); | |
1909 | return 0; | |
1910 | } | |
1911 | } | |
1912 | read_unlock_bh(&idev->lock); | |
1913 | return -EADDRNOTAVAIL; | |
1914 | } | |
1915 | ||
1916 | ||
1917 | int addrconf_add_ifaddr(void __user *arg) | |
1918 | { | |
1919 | struct in6_ifreq ireq; | |
1920 | int err; | |
1921 | ||
1922 | if (!capable(CAP_NET_ADMIN)) | |
1923 | return -EPERM; | |
1924 | ||
1925 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1926 | return -EFAULT; | |
1927 | ||
1928 | rtnl_lock(); | |
1929 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1930 | rtnl_unlock(); | |
1931 | return err; | |
1932 | } | |
1933 | ||
1934 | int addrconf_del_ifaddr(void __user *arg) | |
1935 | { | |
1936 | struct in6_ifreq ireq; | |
1937 | int err; | |
1938 | ||
1939 | if (!capable(CAP_NET_ADMIN)) | |
1940 | return -EPERM; | |
1941 | ||
1942 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1943 | return -EFAULT; | |
1944 | ||
1945 | rtnl_lock(); | |
1946 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1947 | rtnl_unlock(); | |
1948 | return err; | |
1949 | } | |
1950 | ||
1951 | static void sit_add_v4_addrs(struct inet6_dev *idev) | |
1952 | { | |
1953 | struct inet6_ifaddr * ifp; | |
1954 | struct in6_addr addr; | |
1955 | struct net_device *dev; | |
1956 | int scope; | |
1957 | ||
1958 | ASSERT_RTNL(); | |
1959 | ||
1960 | memset(&addr, 0, sizeof(struct in6_addr)); | |
1961 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
1962 | ||
1963 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
1964 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1965 | scope = IFA_LINK; | |
1966 | } else { | |
1967 | scope = IPV6_ADDR_COMPATv4; | |
1968 | } | |
1969 | ||
1970 | if (addr.s6_addr32[3]) { | |
1971 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
1972 | if (!IS_ERR(ifp)) { | |
1973 | spin_lock_bh(&ifp->lock); | |
1974 | ifp->flags &= ~IFA_F_TENTATIVE; | |
1975 | spin_unlock_bh(&ifp->lock); | |
1976 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1977 | in6_ifa_put(ifp); | |
1978 | } | |
1979 | return; | |
1980 | } | |
1981 | ||
1982 | for (dev = dev_base; dev != NULL; dev = dev->next) { | |
e5ed6399 | 1983 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1984 | if (in_dev && (dev->flags & IFF_UP)) { |
1985 | struct in_ifaddr * ifa; | |
1986 | ||
1987 | int flag = scope; | |
1988 | ||
1989 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1990 | int plen; | |
1991 | ||
1992 | addr.s6_addr32[3] = ifa->ifa_local; | |
1993 | ||
1994 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
1995 | continue; | |
1996 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
1997 | if (idev->dev->flags&IFF_POINTOPOINT) | |
1998 | continue; | |
1999 | flag |= IFA_HOST; | |
2000 | } | |
2001 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2002 | plen = 64; | |
2003 | else | |
2004 | plen = 96; | |
2005 | ||
2006 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2007 | IFA_F_PERMANENT); | |
2008 | if (!IS_ERR(ifp)) { | |
2009 | spin_lock_bh(&ifp->lock); | |
2010 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2011 | spin_unlock_bh(&ifp->lock); | |
2012 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2013 | in6_ifa_put(ifp); | |
2014 | } | |
2015 | } | |
2016 | } | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | static void init_loopback(struct net_device *dev) | |
2021 | { | |
2022 | struct inet6_dev *idev; | |
2023 | struct inet6_ifaddr * ifp; | |
2024 | ||
2025 | /* ::1 */ | |
2026 | ||
2027 | ASSERT_RTNL(); | |
2028 | ||
2029 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2030 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2031 | return; | |
2032 | } | |
2033 | ||
2034 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2035 | if (!IS_ERR(ifp)) { | |
2036 | spin_lock_bh(&ifp->lock); | |
2037 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2038 | spin_unlock_bh(&ifp->lock); | |
2039 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2040 | in6_ifa_put(ifp); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2045 | { | |
2046 | struct inet6_ifaddr * ifp; | |
2047 | ||
2048 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2049 | if (!IS_ERR(ifp)) { | |
2050 | addrconf_dad_start(ifp, 0); | |
2051 | in6_ifa_put(ifp); | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | static void addrconf_dev_config(struct net_device *dev) | |
2056 | { | |
2057 | struct in6_addr addr; | |
2058 | struct inet6_dev * idev; | |
2059 | ||
2060 | ASSERT_RTNL(); | |
2061 | ||
2062 | if ((dev->type != ARPHRD_ETHER) && | |
2063 | (dev->type != ARPHRD_FDDI) && | |
2064 | (dev->type != ARPHRD_IEEE802_TR) && | |
2065 | (dev->type != ARPHRD_ARCNET) && | |
2066 | (dev->type != ARPHRD_INFINIBAND)) { | |
2067 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2068 | return; | |
2069 | } | |
2070 | ||
2071 | idev = addrconf_add_dev(dev); | |
2072 | if (idev == NULL) | |
2073 | return; | |
2074 | ||
2075 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2076 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2077 | ||
2078 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2079 | addrconf_add_linklocal(idev, &addr); | |
2080 | } | |
2081 | ||
2082 | static void addrconf_sit_config(struct net_device *dev) | |
2083 | { | |
2084 | struct inet6_dev *idev; | |
2085 | ||
2086 | ASSERT_RTNL(); | |
2087 | ||
2088 | /* | |
2089 | * Configure the tunnel with one of our IPv4 | |
2090 | * addresses... we should configure all of | |
2091 | * our v4 addrs in the tunnel | |
2092 | */ | |
2093 | ||
2094 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2095 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | sit_add_v4_addrs(idev); | |
2100 | ||
2101 | if (dev->flags&IFF_POINTOPOINT) { | |
2102 | addrconf_add_mroute(dev); | |
2103 | addrconf_add_lroute(dev); | |
2104 | } else | |
2105 | sit_route_add(dev); | |
2106 | } | |
2107 | ||
2108 | static inline int | |
2109 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2110 | { | |
2111 | struct in6_addr lladdr; | |
2112 | ||
2113 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2114 | addrconf_add_linklocal(idev, &lladdr); | |
2115 | return 0; | |
2116 | } | |
2117 | return -1; | |
2118 | } | |
2119 | ||
2120 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2121 | { | |
2122 | struct net_device *link_dev; | |
2123 | ||
2124 | /* first try to inherit the link-local address from the link device */ | |
2125 | if (idev->dev->iflink && | |
2126 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2127 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2128 | return; | |
2129 | } | |
2130 | /* then try to inherit it from any device */ | |
2131 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2132 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2133 | return; | |
2134 | } | |
2135 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2136 | } | |
2137 | ||
2138 | /* | |
2139 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2140 | * DHCPv6, MLD etc. can be run over the virtual link | |
2141 | */ | |
2142 | ||
2143 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2144 | { | |
2145 | struct inet6_dev *idev; | |
2146 | ||
2147 | ASSERT_RTNL(); | |
2148 | ||
2149 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2150 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2151 | return; | |
2152 | } | |
2153 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2154 | } |
2155 | ||
2156 | static int addrconf_notify(struct notifier_block *this, unsigned long event, | |
2157 | void * data) | |
2158 | { | |
2159 | struct net_device *dev = (struct net_device *) data; | |
2160 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2161 | int run_pending = 0; |
1da177e4 LT |
2162 | |
2163 | switch(event) { | |
2164 | case NETDEV_UP: | |
3c21edbd YH |
2165 | case NETDEV_CHANGE: |
2166 | if (event == NETDEV_UP) { | |
2167 | if (!netif_carrier_ok(dev)) { | |
2168 | /* device is not ready yet. */ | |
2169 | printk(KERN_INFO | |
2170 | "ADDRCONF(NETDEV_UP): %s: " | |
2171 | "link is not ready\n", | |
2172 | dev->name); | |
2173 | break; | |
2174 | } | |
99081049 KS |
2175 | |
2176 | if (idev) | |
2177 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2178 | } else { |
2179 | if (!netif_carrier_ok(dev)) { | |
2180 | /* device is still not ready. */ | |
2181 | break; | |
2182 | } | |
2183 | ||
2184 | if (idev) { | |
2185 | if (idev->if_flags & IF_READY) { | |
2186 | /* device is already configured. */ | |
2187 | break; | |
2188 | } | |
2189 | idev->if_flags |= IF_READY; | |
2190 | } | |
2191 | ||
2192 | printk(KERN_INFO | |
2193 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2194 | "link becomes ready\n", | |
2195 | dev->name); | |
2196 | ||
c5e33bdd | 2197 | run_pending = 1; |
3c21edbd YH |
2198 | } |
2199 | ||
1da177e4 LT |
2200 | switch(dev->type) { |
2201 | case ARPHRD_SIT: | |
2202 | addrconf_sit_config(dev); | |
2203 | break; | |
2204 | case ARPHRD_TUNNEL6: | |
2205 | addrconf_ip6_tnl_config(dev); | |
2206 | break; | |
2207 | case ARPHRD_LOOPBACK: | |
2208 | init_loopback(dev); | |
2209 | break; | |
2210 | ||
2211 | default: | |
2212 | addrconf_dev_config(dev); | |
2213 | break; | |
2214 | }; | |
2215 | if (idev) { | |
c5e33bdd YH |
2216 | if (run_pending) |
2217 | addrconf_dad_run(idev); | |
2218 | ||
1da177e4 LT |
2219 | /* If the MTU changed during the interface down, when the |
2220 | interface up, the changed MTU must be reflected in the | |
2221 | idev as well as routers. | |
2222 | */ | |
2223 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2224 | rt6_mtu_change(dev, dev->mtu); | |
2225 | idev->cnf.mtu6 = dev->mtu; | |
2226 | } | |
2227 | idev->tstamp = jiffies; | |
2228 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2229 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2230 | stop IPv6 on this interface. | |
2231 | */ | |
2232 | if (dev->mtu < IPV6_MIN_MTU) | |
2233 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2234 | } | |
2235 | break; | |
2236 | ||
2237 | case NETDEV_CHANGEMTU: | |
2238 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2239 | rt6_mtu_change(dev, dev->mtu); | |
2240 | idev->cnf.mtu6 = dev->mtu; | |
2241 | break; | |
2242 | } | |
2243 | ||
2244 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2245 | ||
2246 | case NETDEV_DOWN: | |
2247 | case NETDEV_UNREGISTER: | |
2248 | /* | |
2249 | * Remove all addresses from this interface. | |
2250 | */ | |
2251 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2252 | break; | |
3c21edbd | 2253 | |
1da177e4 LT |
2254 | case NETDEV_CHANGENAME: |
2255 | #ifdef CONFIG_SYSCTL | |
2256 | if (idev) { | |
2257 | addrconf_sysctl_unregister(&idev->cnf); | |
2258 | neigh_sysctl_unregister(idev->nd_parms); | |
2259 | neigh_sysctl_register(dev, idev->nd_parms, | |
2260 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2261 | &ndisc_ifinfo_sysctl_change, | |
2262 | NULL); | |
2263 | addrconf_sysctl_register(idev, &idev->cnf); | |
2264 | } | |
2265 | #endif | |
2266 | break; | |
2267 | }; | |
2268 | ||
2269 | return NOTIFY_OK; | |
2270 | } | |
2271 | ||
2272 | /* | |
2273 | * addrconf module should be notified of a device going up | |
2274 | */ | |
2275 | static struct notifier_block ipv6_dev_notf = { | |
2276 | .notifier_call = addrconf_notify, | |
2277 | .priority = 0 | |
2278 | }; | |
2279 | ||
2280 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2281 | { | |
2282 | struct inet6_dev *idev; | |
2283 | struct inet6_ifaddr *ifa, **bifa; | |
2284 | int i; | |
2285 | ||
2286 | ASSERT_RTNL(); | |
2287 | ||
2288 | if (dev == &loopback_dev && how == 1) | |
2289 | how = 0; | |
2290 | ||
2291 | rt6_ifdown(dev); | |
2292 | neigh_ifdown(&nd_tbl, dev); | |
2293 | ||
2294 | idev = __in6_dev_get(dev); | |
2295 | if (idev == NULL) | |
2296 | return -ENODEV; | |
2297 | ||
2298 | /* Step 1: remove reference to ipv6 device from parent device. | |
2299 | Do not dev_put! | |
2300 | */ | |
2301 | if (how == 1) { | |
2302 | write_lock_bh(&addrconf_lock); | |
2303 | dev->ip6_ptr = NULL; | |
2304 | idev->dead = 1; | |
2305 | write_unlock_bh(&addrconf_lock); | |
2306 | ||
2307 | /* Step 1.5: remove snmp6 entry */ | |
2308 | snmp6_unregister_dev(idev); | |
2309 | ||
2310 | } | |
2311 | ||
2312 | /* Step 2: clear hash table */ | |
2313 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2314 | bifa = &inet6_addr_lst[i]; | |
2315 | ||
2316 | write_lock_bh(&addrconf_hash_lock); | |
2317 | while ((ifa = *bifa) != NULL) { | |
2318 | if (ifa->idev == idev) { | |
2319 | *bifa = ifa->lst_next; | |
2320 | ifa->lst_next = NULL; | |
2321 | addrconf_del_timer(ifa); | |
2322 | in6_ifa_put(ifa); | |
2323 | continue; | |
2324 | } | |
2325 | bifa = &ifa->lst_next; | |
2326 | } | |
2327 | write_unlock_bh(&addrconf_hash_lock); | |
2328 | } | |
2329 | ||
2330 | write_lock_bh(&idev->lock); | |
2331 | ||
2332 | /* Step 3: clear flags for stateless addrconf */ | |
2333 | if (how != 1) | |
3c21edbd | 2334 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2335 | |
2336 | /* Step 4: clear address list */ | |
2337 | #ifdef CONFIG_IPV6_PRIVACY | |
2338 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2339 | in6_dev_put(idev); | |
2340 | ||
2341 | /* clear tempaddr list */ | |
2342 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2343 | idev->tempaddr_list = ifa->tmp_next; | |
2344 | ifa->tmp_next = NULL; | |
2345 | ifa->dead = 1; | |
2346 | write_unlock_bh(&idev->lock); | |
2347 | spin_lock_bh(&ifa->lock); | |
2348 | ||
2349 | if (ifa->ifpub) { | |
2350 | in6_ifa_put(ifa->ifpub); | |
2351 | ifa->ifpub = NULL; | |
2352 | } | |
2353 | spin_unlock_bh(&ifa->lock); | |
2354 | in6_ifa_put(ifa); | |
2355 | write_lock_bh(&idev->lock); | |
2356 | } | |
2357 | #endif | |
2358 | while ((ifa = idev->addr_list) != NULL) { | |
2359 | idev->addr_list = ifa->if_next; | |
2360 | ifa->if_next = NULL; | |
2361 | ifa->dead = 1; | |
2362 | addrconf_del_timer(ifa); | |
2363 | write_unlock_bh(&idev->lock); | |
2364 | ||
2365 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2366 | in6_ifa_put(ifa); | |
2367 | ||
2368 | write_lock_bh(&idev->lock); | |
2369 | } | |
2370 | write_unlock_bh(&idev->lock); | |
2371 | ||
2372 | /* Step 5: Discard multicast list */ | |
2373 | ||
2374 | if (how == 1) | |
2375 | ipv6_mc_destroy_dev(idev); | |
2376 | else | |
2377 | ipv6_mc_down(idev); | |
2378 | ||
2379 | /* Step 5: netlink notification of this interface */ | |
2380 | idev->tstamp = jiffies; | |
979ad663 | 2381 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1da177e4 LT |
2382 | |
2383 | /* Shot the device (if unregistered) */ | |
2384 | ||
2385 | if (how == 1) { | |
2386 | #ifdef CONFIG_SYSCTL | |
2387 | addrconf_sysctl_unregister(&idev->cnf); | |
2388 | neigh_sysctl_unregister(idev->nd_parms); | |
2389 | #endif | |
2390 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2391 | neigh_ifdown(&nd_tbl, dev); | |
2392 | in6_dev_put(idev); | |
2393 | } | |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | static void addrconf_rs_timer(unsigned long data) | |
2398 | { | |
2399 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2400 | ||
2401 | if (ifp->idev->cnf.forwarding) | |
2402 | goto out; | |
2403 | ||
2404 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2405 | /* | |
2406 | * Announcement received after solicitation | |
2407 | * was sent | |
2408 | */ | |
2409 | goto out; | |
2410 | } | |
2411 | ||
2412 | spin_lock(&ifp->lock); | |
2413 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2414 | struct in6_addr all_routers; | |
2415 | ||
2416 | /* The wait after the last probe can be shorter */ | |
2417 | addrconf_mod_timer(ifp, AC_RS, | |
2418 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2419 | ifp->idev->cnf.rtr_solicit_delay : | |
2420 | ifp->idev->cnf.rtr_solicit_interval); | |
2421 | spin_unlock(&ifp->lock); | |
2422 | ||
2423 | ipv6_addr_all_routers(&all_routers); | |
2424 | ||
2425 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2426 | } else { | |
2427 | spin_unlock(&ifp->lock); | |
2428 | /* | |
2429 | * Note: we do not support deprecated "all on-link" | |
2430 | * assumption any longer. | |
2431 | */ | |
2432 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2433 | ifp->idev->dev->name); | |
2434 | } | |
2435 | ||
2436 | out: | |
2437 | in6_ifa_put(ifp); | |
2438 | } | |
2439 | ||
2440 | /* | |
2441 | * Duplicate Address Detection | |
2442 | */ | |
3c21edbd YH |
2443 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2444 | { | |
2445 | unsigned long rand_num; | |
2446 | struct inet6_dev *idev = ifp->idev; | |
2447 | ||
2448 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2449 | ifp->probes = idev->cnf.dad_transmits; | |
2450 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2451 | } | |
2452 | ||
e431b8c0 | 2453 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2454 | { |
2455 | struct inet6_dev *idev = ifp->idev; | |
2456 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2457 | |
2458 | addrconf_join_solict(dev, &ifp->addr); | |
2459 | ||
2460 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2461 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2462 | flags); | |
2463 | ||
2464 | net_srandom(ifp->addr.s6_addr32[3]); | |
1da177e4 LT |
2465 | |
2466 | read_lock_bh(&idev->lock); | |
2467 | if (ifp->dead) | |
2468 | goto out; | |
2469 | spin_lock_bh(&ifp->lock); | |
2470 | ||
2471 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
2472 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2473 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2474 | spin_unlock_bh(&ifp->lock); | |
2475 | read_unlock_bh(&idev->lock); | |
2476 | ||
2477 | addrconf_dad_completed(ifp); | |
2478 | return; | |
2479 | } | |
2480 | ||
6732bade | 2481 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2482 | spin_unlock_bh(&ifp->lock); |
6732bade | 2483 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2484 | /* |
2485 | * If the defice is not ready: | |
2486 | * - keep it tentative if it is a permanent address. | |
2487 | * - otherwise, kill it. | |
2488 | */ | |
2489 | in6_ifa_hold(ifp); | |
2490 | addrconf_dad_stop(ifp); | |
6732bade | 2491 | return; |
3c21edbd | 2492 | } |
6732bade YH |
2493 | addrconf_dad_kick(ifp); |
2494 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2495 | out: |
2496 | read_unlock_bh(&idev->lock); | |
2497 | } | |
2498 | ||
2499 | static void addrconf_dad_timer(unsigned long data) | |
2500 | { | |
2501 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2502 | struct inet6_dev *idev = ifp->idev; | |
2503 | struct in6_addr unspec; | |
2504 | struct in6_addr mcaddr; | |
2505 | ||
2506 | read_lock_bh(&idev->lock); | |
2507 | if (idev->dead) { | |
2508 | read_unlock_bh(&idev->lock); | |
2509 | goto out; | |
2510 | } | |
2511 | spin_lock_bh(&ifp->lock); | |
2512 | if (ifp->probes == 0) { | |
2513 | /* | |
2514 | * DAD was successful | |
2515 | */ | |
2516 | ||
2517 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2518 | spin_unlock_bh(&ifp->lock); | |
2519 | read_unlock_bh(&idev->lock); | |
2520 | ||
2521 | addrconf_dad_completed(ifp); | |
2522 | ||
2523 | goto out; | |
2524 | } | |
2525 | ||
2526 | ifp->probes--; | |
2527 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2528 | spin_unlock_bh(&ifp->lock); | |
2529 | read_unlock_bh(&idev->lock); | |
2530 | ||
2531 | /* send a neighbour solicitation for our addr */ | |
2532 | memset(&unspec, 0, sizeof(unspec)); | |
2533 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2534 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2535 | out: | |
2536 | in6_ifa_put(ifp); | |
2537 | } | |
2538 | ||
2539 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2540 | { | |
2541 | struct net_device * dev = ifp->idev->dev; | |
2542 | ||
2543 | /* | |
2544 | * Configure the address for reception. Now it is valid. | |
2545 | */ | |
2546 | ||
2547 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2548 | ||
2549 | /* If added prefix is link local and forwarding is off, | |
2550 | start sending router solicitations. | |
2551 | */ | |
2552 | ||
2553 | if (ifp->idev->cnf.forwarding == 0 && | |
2554 | ifp->idev->cnf.rtr_solicits > 0 && | |
2555 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2556 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2557 | struct in6_addr all_routers; | |
2558 | ||
2559 | ipv6_addr_all_routers(&all_routers); | |
2560 | ||
2561 | /* | |
2562 | * If a host as already performed a random delay | |
2563 | * [...] as part of DAD [...] there is no need | |
2564 | * to delay again before sending the first RS | |
2565 | */ | |
2566 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2567 | ||
2568 | spin_lock_bh(&ifp->lock); | |
2569 | ifp->probes = 1; | |
2570 | ifp->idev->if_flags |= IF_RS_SENT; | |
2571 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2572 | spin_unlock_bh(&ifp->lock); | |
2573 | } | |
2574 | } | |
2575 | ||
c5e33bdd YH |
2576 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2577 | struct inet6_ifaddr *ifp; | |
2578 | ||
2579 | read_lock_bh(&idev->lock); | |
2580 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2581 | spin_lock_bh(&ifp->lock); | |
2582 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2583 | spin_unlock_bh(&ifp->lock); | |
2584 | continue; | |
2585 | } | |
2586 | spin_unlock_bh(&ifp->lock); | |
2587 | addrconf_dad_kick(ifp); | |
2588 | } | |
2589 | read_unlock_bh(&idev->lock); | |
2590 | } | |
2591 | ||
1da177e4 LT |
2592 | #ifdef CONFIG_PROC_FS |
2593 | struct if6_iter_state { | |
2594 | int bucket; | |
2595 | }; | |
2596 | ||
2597 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2598 | { | |
2599 | struct inet6_ifaddr *ifa = NULL; | |
2600 | struct if6_iter_state *state = seq->private; | |
2601 | ||
2602 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2603 | ifa = inet6_addr_lst[state->bucket]; | |
2604 | if (ifa) | |
2605 | break; | |
2606 | } | |
2607 | return ifa; | |
2608 | } | |
2609 | ||
2610 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2611 | { | |
2612 | struct if6_iter_state *state = seq->private; | |
2613 | ||
2614 | ifa = ifa->lst_next; | |
2615 | try_again: | |
2616 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2617 | ifa = inet6_addr_lst[state->bucket]; | |
2618 | goto try_again; | |
2619 | } | |
2620 | return ifa; | |
2621 | } | |
2622 | ||
2623 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2624 | { | |
2625 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2626 | ||
2627 | if (ifa) | |
2628 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2629 | --pos; | |
2630 | return pos ? NULL : ifa; | |
2631 | } | |
2632 | ||
2633 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2634 | { | |
2635 | read_lock_bh(&addrconf_hash_lock); | |
2636 | return if6_get_idx(seq, *pos); | |
2637 | } | |
2638 | ||
2639 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2640 | { | |
2641 | struct inet6_ifaddr *ifa; | |
2642 | ||
2643 | ifa = if6_get_next(seq, v); | |
2644 | ++*pos; | |
2645 | return ifa; | |
2646 | } | |
2647 | ||
2648 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2649 | { | |
2650 | read_unlock_bh(&addrconf_hash_lock); | |
2651 | } | |
2652 | ||
2653 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2654 | { | |
2655 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2656 | seq_printf(seq, | |
9343e79a | 2657 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2658 | NIP6(ifp->addr), |
2659 | ifp->idev->dev->ifindex, | |
2660 | ifp->prefix_len, | |
2661 | ifp->scope, | |
2662 | ifp->flags, | |
2663 | ifp->idev->dev->name); | |
2664 | return 0; | |
2665 | } | |
2666 | ||
2667 | static struct seq_operations if6_seq_ops = { | |
2668 | .start = if6_seq_start, | |
2669 | .next = if6_seq_next, | |
2670 | .show = if6_seq_show, | |
2671 | .stop = if6_seq_stop, | |
2672 | }; | |
2673 | ||
2674 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2675 | { | |
2676 | struct seq_file *seq; | |
2677 | int rc = -ENOMEM; | |
322f74a4 | 2678 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2679 | |
2680 | if (!s) | |
2681 | goto out; | |
1da177e4 LT |
2682 | |
2683 | rc = seq_open(file, &if6_seq_ops); | |
2684 | if (rc) | |
2685 | goto out_kfree; | |
2686 | ||
2687 | seq = file->private_data; | |
2688 | seq->private = s; | |
2689 | out: | |
2690 | return rc; | |
2691 | out_kfree: | |
2692 | kfree(s); | |
2693 | goto out; | |
2694 | } | |
2695 | ||
2696 | static struct file_operations if6_fops = { | |
2697 | .owner = THIS_MODULE, | |
2698 | .open = if6_seq_open, | |
2699 | .read = seq_read, | |
2700 | .llseek = seq_lseek, | |
2701 | .release = seq_release_private, | |
2702 | }; | |
2703 | ||
2704 | int __init if6_proc_init(void) | |
2705 | { | |
2706 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2707 | return -ENOMEM; | |
2708 | return 0; | |
2709 | } | |
2710 | ||
2711 | void if6_proc_exit(void) | |
2712 | { | |
2713 | proc_net_remove("if_inet6"); | |
2714 | } | |
2715 | #endif /* CONFIG_PROC_FS */ | |
2716 | ||
2717 | /* | |
2718 | * Periodic address status verification | |
2719 | */ | |
2720 | ||
2721 | static void addrconf_verify(unsigned long foo) | |
2722 | { | |
2723 | struct inet6_ifaddr *ifp; | |
2724 | unsigned long now, next; | |
2725 | int i; | |
2726 | ||
2727 | spin_lock_bh(&addrconf_verify_lock); | |
2728 | now = jiffies; | |
2729 | next = now + ADDR_CHECK_FREQUENCY; | |
2730 | ||
2731 | del_timer(&addr_chk_timer); | |
2732 | ||
2733 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2734 | ||
2735 | restart: | |
5d5780df | 2736 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2737 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2738 | unsigned long age; | |
2739 | #ifdef CONFIG_IPV6_PRIVACY | |
2740 | unsigned long regen_advance; | |
2741 | #endif | |
2742 | ||
2743 | if (ifp->flags & IFA_F_PERMANENT) | |
2744 | continue; | |
2745 | ||
2746 | spin_lock(&ifp->lock); | |
2747 | age = (now - ifp->tstamp) / HZ; | |
2748 | ||
2749 | #ifdef CONFIG_IPV6_PRIVACY | |
2750 | regen_advance = ifp->idev->cnf.regen_max_retry * | |
2751 | ifp->idev->cnf.dad_transmits * | |
2752 | ifp->idev->nd_parms->retrans_time / HZ; | |
2753 | #endif | |
2754 | ||
2755 | if (age >= ifp->valid_lft) { | |
2756 | spin_unlock(&ifp->lock); | |
2757 | in6_ifa_hold(ifp); | |
5d5780df | 2758 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2759 | ipv6_del_addr(ifp); |
2760 | goto restart; | |
2761 | } else if (age >= ifp->prefered_lft) { | |
2762 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2763 | int deprecate = 0; | |
2764 | ||
2765 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2766 | deprecate = 1; | |
2767 | ifp->flags |= IFA_F_DEPRECATED; | |
2768 | } | |
2769 | ||
2770 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2771 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2772 | ||
2773 | spin_unlock(&ifp->lock); | |
2774 | ||
2775 | if (deprecate) { | |
2776 | in6_ifa_hold(ifp); | |
5d5780df | 2777 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2778 | |
2779 | ipv6_ifa_notify(0, ifp); | |
2780 | in6_ifa_put(ifp); | |
2781 | goto restart; | |
2782 | } | |
2783 | #ifdef CONFIG_IPV6_PRIVACY | |
2784 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2785 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2786 | if (age >= ifp->prefered_lft - regen_advance) { | |
2787 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2788 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2789 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2790 | if (!ifp->regen_count && ifpub) { | |
2791 | ifp->regen_count++; | |
2792 | in6_ifa_hold(ifp); | |
2793 | in6_ifa_hold(ifpub); | |
2794 | spin_unlock(&ifp->lock); | |
5d5780df | 2795 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2796 | spin_lock(&ifpub->lock); |
2797 | ifpub->regen_count = 0; | |
2798 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2799 | ipv6_create_tempaddr(ifpub, ifp); |
2800 | in6_ifa_put(ifpub); | |
2801 | in6_ifa_put(ifp); | |
2802 | goto restart; | |
2803 | } | |
2804 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2805 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2806 | spin_unlock(&ifp->lock); | |
2807 | #endif | |
2808 | } else { | |
2809 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2810 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2811 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2812 | spin_unlock(&ifp->lock); | |
2813 | } | |
2814 | } | |
5d5780df | 2815 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2816 | } |
2817 | ||
2818 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2819 | add_timer(&addr_chk_timer); | |
2820 | spin_unlock_bh(&addrconf_verify_lock); | |
2821 | } | |
2822 | ||
2823 | static int | |
2824 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2825 | { | |
2826 | struct rtattr **rta = arg; | |
2827 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2828 | struct in6_addr *pfx; | |
2829 | ||
2830 | pfx = NULL; | |
2831 | if (rta[IFA_ADDRESS-1]) { | |
2832 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2833 | return -EINVAL; | |
2834 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2835 | } | |
2836 | if (rta[IFA_LOCAL-1]) { | |
2837 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) | |
2838 | return -EINVAL; | |
2839 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2840 | } | |
2841 | if (pfx == NULL) | |
2842 | return -EINVAL; | |
2843 | ||
2844 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2845 | } | |
2846 | ||
2847 | static int | |
2848 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2849 | { | |
2850 | struct rtattr **rta = arg; | |
2851 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2852 | struct in6_addr *pfx; | |
2853 | ||
2854 | pfx = NULL; | |
2855 | if (rta[IFA_ADDRESS-1]) { | |
2856 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2857 | return -EINVAL; | |
2858 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2859 | } | |
2860 | if (rta[IFA_LOCAL-1]) { | |
2861 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) | |
2862 | return -EINVAL; | |
2863 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2864 | } | |
2865 | if (pfx == NULL) | |
2866 | return -EINVAL; | |
2867 | ||
2868 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2869 | } | |
2870 | ||
c5396a31 YH |
2871 | /* Maximum length of ifa_cacheinfo attributes */ |
2872 | #define INET6_IFADDR_RTA_SPACE \ | |
2873 | RTA_SPACE(16) /* IFA_ADDRESS */ + \ | |
2874 | RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */ | |
2875 | ||
1da177e4 | 2876 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 2877 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
2878 | { |
2879 | struct ifaddrmsg *ifm; | |
2880 | struct nlmsghdr *nlh; | |
2881 | struct ifa_cacheinfo ci; | |
2882 | unsigned char *b = skb->tail; | |
2883 | ||
b6544c0b | 2884 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2885 | ifm = NLMSG_DATA(nlh); |
2886 | ifm->ifa_family = AF_INET6; | |
2887 | ifm->ifa_prefixlen = ifa->prefix_len; | |
2888 | ifm->ifa_flags = ifa->flags; | |
2889 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2890 | if (ifa->scope&IFA_HOST) | |
2891 | ifm->ifa_scope = RT_SCOPE_HOST; | |
2892 | else if (ifa->scope&IFA_LINK) | |
2893 | ifm->ifa_scope = RT_SCOPE_LINK; | |
2894 | else if (ifa->scope&IFA_SITE) | |
2895 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2896 | ifm->ifa_index = ifa->idev->dev->ifindex; | |
2897 | RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr); | |
2898 | if (!(ifa->flags&IFA_F_PERMANENT)) { | |
2899 | ci.ifa_prefered = ifa->prefered_lft; | |
2900 | ci.ifa_valid = ifa->valid_lft; | |
2901 | if (ci.ifa_prefered != INFINITY_LIFE_TIME) { | |
2902 | long tval = (jiffies - ifa->tstamp)/HZ; | |
2903 | ci.ifa_prefered -= tval; | |
2904 | if (ci.ifa_valid != INFINITY_LIFE_TIME) | |
2905 | ci.ifa_valid -= tval; | |
2906 | } | |
2907 | } else { | |
2908 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2909 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2910 | } | |
2911 | ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100 | |
2912 | + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
2913 | ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
2914 | + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
2915 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2916 | nlh->nlmsg_len = skb->tail - b; | |
2917 | return skb->len; | |
2918 | ||
2919 | nlmsg_failure: | |
2920 | rtattr_failure: | |
2921 | skb_trim(skb, b - skb->data); | |
2922 | return -1; | |
2923 | } | |
2924 | ||
2925 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 2926 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 LT |
2927 | { |
2928 | struct ifaddrmsg *ifm; | |
2929 | struct nlmsghdr *nlh; | |
2930 | struct ifa_cacheinfo ci; | |
2931 | unsigned char *b = skb->tail; | |
2932 | ||
b6544c0b | 2933 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2934 | ifm = NLMSG_DATA(nlh); |
2935 | ifm->ifa_family = AF_INET6; | |
2936 | ifm->ifa_prefixlen = 128; | |
2937 | ifm->ifa_flags = IFA_F_PERMANENT; | |
2938 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2939 | if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE) | |
2940 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2941 | ifm->ifa_index = ifmca->idev->dev->ifindex; | |
2942 | RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr); | |
2943 | ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ | |
2944 | * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ | |
2945 | * 100 / HZ); | |
2946 | ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ | |
2947 | * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ | |
2948 | * 100 / HZ); | |
2949 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2950 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2951 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2952 | nlh->nlmsg_len = skb->tail - b; | |
2953 | return skb->len; | |
2954 | ||
2955 | nlmsg_failure: | |
2956 | rtattr_failure: | |
2957 | skb_trim(skb, b - skb->data); | |
2958 | return -1; | |
2959 | } | |
2960 | ||
2961 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 2962 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
2963 | { |
2964 | struct ifaddrmsg *ifm; | |
2965 | struct nlmsghdr *nlh; | |
2966 | struct ifa_cacheinfo ci; | |
2967 | unsigned char *b = skb->tail; | |
2968 | ||
b6544c0b | 2969 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
2970 | ifm = NLMSG_DATA(nlh); |
2971 | ifm->ifa_family = AF_INET6; | |
2972 | ifm->ifa_prefixlen = 128; | |
2973 | ifm->ifa_flags = IFA_F_PERMANENT; | |
2974 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
2975 | if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE) | |
2976 | ifm->ifa_scope = RT_SCOPE_SITE; | |
2977 | ifm->ifa_index = ifaca->aca_idev->dev->ifindex; | |
2978 | RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr); | |
2979 | ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ | |
2980 | * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ | |
2981 | * 100 / HZ); | |
2982 | ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ | |
2983 | * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ | |
2984 | * 100 / HZ); | |
2985 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
2986 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
2987 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
2988 | nlh->nlmsg_len = skb->tail - b; | |
2989 | return skb->len; | |
2990 | ||
2991 | nlmsg_failure: | |
2992 | rtattr_failure: | |
2993 | skb_trim(skb, b - skb->data); | |
2994 | return -1; | |
2995 | } | |
2996 | ||
2997 | enum addr_type_t | |
2998 | { | |
2999 | UNICAST_ADDR, | |
3000 | MULTICAST_ADDR, | |
3001 | ANYCAST_ADDR, | |
3002 | }; | |
3003 | ||
3004 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3005 | enum addr_type_t type) | |
3006 | { | |
3007 | int idx, ip_idx; | |
3008 | int s_idx, s_ip_idx; | |
3009 | int err = 1; | |
3010 | struct net_device *dev; | |
3011 | struct inet6_dev *idev = NULL; | |
3012 | struct inet6_ifaddr *ifa; | |
3013 | struct ifmcaddr6 *ifmca; | |
3014 | struct ifacaddr6 *ifaca; | |
3015 | ||
3016 | s_idx = cb->args[0]; | |
3017 | s_ip_idx = ip_idx = cb->args[1]; | |
3018 | read_lock(&dev_base_lock); | |
3019 | ||
3020 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
3021 | if (idx < s_idx) | |
3022 | continue; | |
3023 | if (idx > s_idx) | |
3024 | s_ip_idx = 0; | |
3025 | ip_idx = 0; | |
3026 | if ((idev = in6_dev_get(dev)) == NULL) | |
3027 | continue; | |
3028 | read_lock_bh(&idev->lock); | |
3029 | switch (type) { | |
3030 | case UNICAST_ADDR: | |
ae9cda5d | 3031 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3032 | for (ifa = idev->addr_list; ifa; |
3033 | ifa = ifa->if_next, ip_idx++) { | |
3034 | if (ip_idx < s_ip_idx) | |
3035 | continue; | |
3036 | if ((err = inet6_fill_ifaddr(skb, ifa, | |
3037 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3038 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3039 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3040 | goto done; |
3041 | } | |
1da177e4 LT |
3042 | break; |
3043 | case MULTICAST_ADDR: | |
3044 | /* multicast address */ | |
3045 | for (ifmca = idev->mc_list; ifmca; | |
3046 | ifmca = ifmca->next, ip_idx++) { | |
3047 | if (ip_idx < s_ip_idx) | |
3048 | continue; | |
3049 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, | |
3050 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3051 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3052 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3053 | goto done; |
3054 | } | |
3055 | break; | |
3056 | case ANYCAST_ADDR: | |
3057 | /* anycast address */ | |
3058 | for (ifaca = idev->ac_list; ifaca; | |
3059 | ifaca = ifaca->aca_next, ip_idx++) { | |
3060 | if (ip_idx < s_ip_idx) | |
3061 | continue; | |
3062 | if ((err = inet6_fill_ifacaddr(skb, ifaca, | |
3063 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3064 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
3065 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3066 | goto done; |
3067 | } | |
3068 | break; | |
3069 | default: | |
3070 | break; | |
3071 | } | |
3072 | read_unlock_bh(&idev->lock); | |
3073 | in6_dev_put(idev); | |
3074 | } | |
3075 | done: | |
3076 | if (err <= 0) { | |
3077 | read_unlock_bh(&idev->lock); | |
3078 | in6_dev_put(idev); | |
3079 | } | |
3080 | read_unlock(&dev_base_lock); | |
3081 | cb->args[0] = idx; | |
3082 | cb->args[1] = ip_idx; | |
3083 | return skb->len; | |
3084 | } | |
3085 | ||
3086 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3087 | { | |
3088 | enum addr_type_t type = UNICAST_ADDR; | |
3089 | return inet6_dump_addr(skb, cb, type); | |
3090 | } | |
3091 | ||
3092 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3093 | { | |
3094 | enum addr_type_t type = MULTICAST_ADDR; | |
3095 | return inet6_dump_addr(skb, cb, type); | |
3096 | } | |
3097 | ||
3098 | ||
3099 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3100 | { | |
3101 | enum addr_type_t type = ANYCAST_ADDR; | |
3102 | return inet6_dump_addr(skb, cb, type); | |
3103 | } | |
3104 | ||
3105 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) | |
3106 | { | |
3107 | struct sk_buff *skb; | |
c5396a31 | 3108 | int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE); |
1da177e4 LT |
3109 | |
3110 | skb = alloc_skb(size, GFP_ATOMIC); | |
3111 | if (!skb) { | |
ac6d439d | 3112 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS); |
1da177e4 LT |
3113 | return; |
3114 | } | |
9ed19f33 | 3115 | if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) { |
1da177e4 | 3116 | kfree_skb(skb); |
ac6d439d | 3117 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL); |
1da177e4 LT |
3118 | return; |
3119 | } | |
ac6d439d PM |
3120 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR; |
3121 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC); | |
1da177e4 LT |
3122 | } |
3123 | ||
3124 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3125 | __s32 *array, int bytes) | |
3126 | { | |
3127 | memset(array, 0, bytes); | |
3128 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3129 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3130 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3131 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3132 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3133 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3134 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3135 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3136 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3137 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3138 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3139 | #ifdef CONFIG_IPV6_PRIVACY | |
3140 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3141 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3142 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3143 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3144 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3145 | #endif | |
3146 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3147 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3148 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3149 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3150 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3151 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
09c884d4 YH |
3152 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3153 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; | |
3154 | #endif | |
930d6ff2 | 3155 | #endif |
1da177e4 LT |
3156 | } |
3157 | ||
c5396a31 YH |
3158 | /* Maximum length of ifinfomsg attributes */ |
3159 | #define INET6_IFINFO_RTA_SPACE \ | |
3160 | RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \ | |
3161 | RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \ | |
3162 | RTA_SPACE(sizeof(u32)) /* MTU */ + \ | |
3163 | RTA_SPACE(sizeof(int)) /* LINK */ + \ | |
3164 | RTA_SPACE(0) /* PROTINFO */ + \ | |
3165 | RTA_SPACE(sizeof(u32)) /* FLAGS */ + \ | |
3166 | RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \ | |
3167 | RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */ | |
3168 | ||
1da177e4 | 3169 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3170 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
3171 | { |
3172 | struct net_device *dev = idev->dev; | |
3173 | __s32 *array = NULL; | |
3174 | struct ifinfomsg *r; | |
3175 | struct nlmsghdr *nlh; | |
3176 | unsigned char *b = skb->tail; | |
3177 | struct rtattr *subattr; | |
3178 | __u32 mtu = dev->mtu; | |
3179 | struct ifla_cacheinfo ci; | |
3180 | ||
b6544c0b | 3181 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); |
1da177e4 LT |
3182 | r = NLMSG_DATA(nlh); |
3183 | r->ifi_family = AF_INET6; | |
9ef1d4c7 | 3184 | r->__ifi_pad = 0; |
1da177e4 LT |
3185 | r->ifi_type = dev->type; |
3186 | r->ifi_index = dev->ifindex; | |
3187 | r->ifi_flags = dev_get_flags(dev); | |
3188 | r->ifi_change = 0; | |
3189 | ||
3190 | RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); | |
3191 | ||
3192 | if (dev->addr_len) | |
3193 | RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); | |
3194 | ||
3195 | RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); | |
3196 | if (dev->ifindex != dev->iflink) | |
3197 | RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink); | |
3198 | ||
3199 | subattr = (struct rtattr*)skb->tail; | |
3200 | ||
3201 | RTA_PUT(skb, IFLA_PROTINFO, 0, NULL); | |
3202 | ||
3203 | /* return the device flags */ | |
3204 | RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags); | |
3205 | ||
3206 | /* return interface cacheinfo */ | |
3207 | ci.max_reasm_len = IPV6_MAXPLEN; | |
3208 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3209 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3210 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3211 | ci.retrans_time = idev->nd_parms->retrans_time; | |
3212 | RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); | |
3213 | ||
3214 | /* return the device sysctl params */ | |
3215 | if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL) | |
3216 | goto rtattr_failure; | |
3217 | ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array)); | |
3218 | RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array); | |
3219 | ||
3220 | /* XXX - Statistics/MC not implemented */ | |
3221 | subattr->rta_len = skb->tail - (u8*)subattr; | |
3222 | ||
3223 | nlh->nlmsg_len = skb->tail - b; | |
3224 | kfree(array); | |
3225 | return skb->len; | |
3226 | ||
3227 | nlmsg_failure: | |
3228 | rtattr_failure: | |
a51482bd | 3229 | kfree(array); |
1da177e4 LT |
3230 | skb_trim(skb, b - skb->data); |
3231 | return -1; | |
3232 | } | |
3233 | ||
3234 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3235 | { | |
3236 | int idx, err; | |
3237 | int s_idx = cb->args[0]; | |
3238 | struct net_device *dev; | |
3239 | struct inet6_dev *idev; | |
3240 | ||
3241 | read_lock(&dev_base_lock); | |
3242 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3243 | if (idx < s_idx) | |
3244 | continue; | |
3245 | if ((idev = in6_dev_get(dev)) == NULL) | |
3246 | continue; | |
3247 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3248 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3249 | in6_dev_put(idev); |
3250 | if (err <= 0) | |
3251 | break; | |
3252 | } | |
3253 | read_unlock(&dev_base_lock); | |
3254 | cb->args[0] = idx; | |
3255 | ||
3256 | return skb->len; | |
3257 | } | |
3258 | ||
3259 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3260 | { | |
3261 | struct sk_buff *skb; | |
c5396a31 | 3262 | int size = NLMSG_SPACE(sizeof(struct ifinfomsg) + INET6_IFINFO_RTA_SPACE); |
1da177e4 LT |
3263 | |
3264 | skb = alloc_skb(size, GFP_ATOMIC); | |
3265 | if (!skb) { | |
ac6d439d | 3266 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS); |
1da177e4 LT |
3267 | return; |
3268 | } | |
9ed19f33 | 3269 | if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) { |
1da177e4 | 3270 | kfree_skb(skb); |
ac6d439d | 3271 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL); |
1da177e4 LT |
3272 | return; |
3273 | } | |
ac6d439d PM |
3274 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO; |
3275 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC); | |
1da177e4 LT |
3276 | } |
3277 | ||
c5396a31 YH |
3278 | /* Maximum length of prefix_cacheinfo attributes */ |
3279 | #define INET6_PREFIX_RTA_SPACE \ | |
3280 | RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \ | |
3281 | RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */ | |
3282 | ||
1da177e4 | 3283 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b JHS |
3284 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3285 | int event, unsigned int flags) | |
1da177e4 LT |
3286 | { |
3287 | struct prefixmsg *pmsg; | |
3288 | struct nlmsghdr *nlh; | |
3289 | unsigned char *b = skb->tail; | |
3290 | struct prefix_cacheinfo ci; | |
3291 | ||
b6544c0b | 3292 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); |
1da177e4 LT |
3293 | pmsg = NLMSG_DATA(nlh); |
3294 | pmsg->prefix_family = AF_INET6; | |
8a47077a PM |
3295 | pmsg->prefix_pad1 = 0; |
3296 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3297 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3298 | pmsg->prefix_len = pinfo->prefix_len; | |
3299 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3300 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3301 | |
3302 | pmsg->prefix_flags = 0; | |
3303 | if (pinfo->onlink) | |
3304 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3305 | if (pinfo->autoconf) | |
3306 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3307 | ||
3308 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); | |
3309 | ||
3310 | ci.preferred_time = ntohl(pinfo->prefered); | |
3311 | ci.valid_time = ntohl(pinfo->valid); | |
3312 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); | |
3313 | ||
3314 | nlh->nlmsg_len = skb->tail - b; | |
3315 | return skb->len; | |
3316 | ||
3317 | nlmsg_failure: | |
3318 | rtattr_failure: | |
3319 | skb_trim(skb, b - skb->data); | |
3320 | return -1; | |
3321 | } | |
3322 | ||
3323 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
3324 | struct prefix_info *pinfo) | |
3325 | { | |
3326 | struct sk_buff *skb; | |
c5396a31 | 3327 | int size = NLMSG_SPACE(sizeof(struct prefixmsg) + INET6_PREFIX_RTA_SPACE); |
1da177e4 LT |
3328 | |
3329 | skb = alloc_skb(size, GFP_ATOMIC); | |
3330 | if (!skb) { | |
ac6d439d | 3331 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS); |
1da177e4 LT |
3332 | return; |
3333 | } | |
9ed19f33 | 3334 | if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) { |
1da177e4 | 3335 | kfree_skb(skb); |
ac6d439d | 3336 | netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL); |
1da177e4 LT |
3337 | return; |
3338 | } | |
ac6d439d PM |
3339 | NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX; |
3340 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC); | |
1da177e4 LT |
3341 | } |
3342 | ||
db46edc6 | 3343 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3344 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3345 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3346 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
3347 | [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, }, | |
3348 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, | |
3349 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3350 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3351 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3352 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3353 | .dumpit = inet6_dump_fib, }, | |
3354 | }; | |
3355 | ||
3356 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3357 | { | |
3358 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3359 | ||
3360 | switch (event) { | |
3361 | case RTM_NEWADDR: | |
4641e7a3 | 3362 | ip6_ins_rt(ifp->rt, NULL, NULL, NULL); |
1da177e4 LT |
3363 | if (ifp->idev->cnf.forwarding) |
3364 | addrconf_join_anycast(ifp); | |
3365 | break; | |
3366 | case RTM_DELADDR: | |
3367 | if (ifp->idev->cnf.forwarding) | |
3368 | addrconf_leave_anycast(ifp); | |
3369 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3370 | dst_hold(&ifp->rt->u.dst); | |
0d51aa80 | 3371 | if (ip6_del_rt(ifp->rt, NULL, NULL, NULL)) |
1da177e4 | 3372 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3373 | break; |
3374 | } | |
3375 | } | |
3376 | ||
3377 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3378 | { | |
3379 | read_lock_bh(&addrconf_lock); | |
3380 | if (likely(ifp->idev->dead == 0)) | |
3381 | __ipv6_ifa_notify(event, ifp); | |
3382 | read_unlock_bh(&addrconf_lock); | |
3383 | } | |
3384 | ||
3385 | #ifdef CONFIG_SYSCTL | |
3386 | ||
3387 | static | |
3388 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3389 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3390 | { | |
3391 | int *valp = ctl->data; | |
3392 | int val = *valp; | |
3393 | int ret; | |
3394 | ||
3395 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3396 | ||
3397 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3398 | if (valp != &ipv6_devconf.forwarding) { | |
3399 | if ((!*valp) ^ (!val)) { | |
3400 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3401 | if (idev == NULL) | |
3402 | return ret; | |
3403 | dev_forward_change(idev); | |
3404 | } | |
3405 | } else { | |
3406 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3407 | addrconf_forward_change(); | |
3408 | } | |
3409 | if (*valp) | |
3410 | rt6_purge_dflt_routers(); | |
3411 | } | |
3412 | ||
3413 | return ret; | |
3414 | } | |
3415 | ||
3416 | static int addrconf_sysctl_forward_strategy(ctl_table *table, | |
3417 | int __user *name, int nlen, | |
3418 | void __user *oldval, | |
3419 | size_t __user *oldlenp, | |
3420 | void __user *newval, size_t newlen, | |
3421 | void **context) | |
3422 | { | |
3423 | int *valp = table->data; | |
3424 | int new; | |
3425 | ||
3426 | if (!newval || !newlen) | |
3427 | return 0; | |
3428 | if (newlen != sizeof(int)) | |
3429 | return -EINVAL; | |
3430 | if (get_user(new, (int __user *)newval)) | |
3431 | return -EFAULT; | |
3432 | if (new == *valp) | |
3433 | return 0; | |
3434 | if (oldval && oldlenp) { | |
3435 | size_t len; | |
3436 | if (get_user(len, oldlenp)) | |
3437 | return -EFAULT; | |
3438 | if (len) { | |
3439 | if (len > table->maxlen) | |
3440 | len = table->maxlen; | |
3441 | if (copy_to_user(oldval, valp, len)) | |
3442 | return -EFAULT; | |
3443 | if (put_user(len, oldlenp)) | |
3444 | return -EFAULT; | |
3445 | } | |
3446 | } | |
3447 | ||
3448 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3449 | if (valp != &ipv6_devconf.forwarding) { | |
3450 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3451 | int changed; | |
3452 | if (unlikely(idev == NULL)) | |
3453 | return -ENODEV; | |
3454 | changed = (!*valp) ^ (!new); | |
3455 | *valp = new; | |
3456 | if (changed) | |
3457 | dev_forward_change(idev); | |
3458 | } else { | |
3459 | *valp = new; | |
3460 | addrconf_forward_change(); | |
3461 | } | |
3462 | ||
3463 | if (*valp) | |
3464 | rt6_purge_dflt_routers(); | |
3465 | } else | |
3466 | *valp = new; | |
3467 | ||
3468 | return 1; | |
3469 | } | |
3470 | ||
3471 | static struct addrconf_sysctl_table | |
3472 | { | |
3473 | struct ctl_table_header *sysctl_header; | |
3474 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3475 | ctl_table addrconf_dev[2]; | |
3476 | ctl_table addrconf_conf_dir[2]; | |
3477 | ctl_table addrconf_proto_dir[2]; | |
3478 | ctl_table addrconf_root_dir[2]; | |
3479 | } addrconf_sysctl = { | |
3480 | .sysctl_header = NULL, | |
3481 | .addrconf_vars = { | |
3482 | { | |
3483 | .ctl_name = NET_IPV6_FORWARDING, | |
3484 | .procname = "forwarding", | |
3485 | .data = &ipv6_devconf.forwarding, | |
3486 | .maxlen = sizeof(int), | |
3487 | .mode = 0644, | |
3488 | .proc_handler = &addrconf_sysctl_forward, | |
3489 | .strategy = &addrconf_sysctl_forward_strategy, | |
3490 | }, | |
3491 | { | |
3492 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3493 | .procname = "hop_limit", | |
3494 | .data = &ipv6_devconf.hop_limit, | |
3495 | .maxlen = sizeof(int), | |
3496 | .mode = 0644, | |
3497 | .proc_handler = proc_dointvec, | |
3498 | }, | |
3499 | { | |
3500 | .ctl_name = NET_IPV6_MTU, | |
3501 | .procname = "mtu", | |
3502 | .data = &ipv6_devconf.mtu6, | |
3503 | .maxlen = sizeof(int), | |
3504 | .mode = 0644, | |
3505 | .proc_handler = &proc_dointvec, | |
3506 | }, | |
3507 | { | |
3508 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3509 | .procname = "accept_ra", | |
3510 | .data = &ipv6_devconf.accept_ra, | |
3511 | .maxlen = sizeof(int), | |
3512 | .mode = 0644, | |
3513 | .proc_handler = &proc_dointvec, | |
3514 | }, | |
3515 | { | |
3516 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3517 | .procname = "accept_redirects", | |
3518 | .data = &ipv6_devconf.accept_redirects, | |
3519 | .maxlen = sizeof(int), | |
3520 | .mode = 0644, | |
3521 | .proc_handler = &proc_dointvec, | |
3522 | }, | |
3523 | { | |
3524 | .ctl_name = NET_IPV6_AUTOCONF, | |
3525 | .procname = "autoconf", | |
3526 | .data = &ipv6_devconf.autoconf, | |
3527 | .maxlen = sizeof(int), | |
3528 | .mode = 0644, | |
3529 | .proc_handler = &proc_dointvec, | |
3530 | }, | |
3531 | { | |
3532 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3533 | .procname = "dad_transmits", | |
3534 | .data = &ipv6_devconf.dad_transmits, | |
3535 | .maxlen = sizeof(int), | |
3536 | .mode = 0644, | |
3537 | .proc_handler = &proc_dointvec, | |
3538 | }, | |
3539 | { | |
3540 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3541 | .procname = "router_solicitations", | |
3542 | .data = &ipv6_devconf.rtr_solicits, | |
3543 | .maxlen = sizeof(int), | |
3544 | .mode = 0644, | |
3545 | .proc_handler = &proc_dointvec, | |
3546 | }, | |
3547 | { | |
3548 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3549 | .procname = "router_solicitation_interval", | |
3550 | .data = &ipv6_devconf.rtr_solicit_interval, | |
3551 | .maxlen = sizeof(int), | |
3552 | .mode = 0644, | |
3553 | .proc_handler = &proc_dointvec_jiffies, | |
3554 | .strategy = &sysctl_jiffies, | |
3555 | }, | |
3556 | { | |
3557 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3558 | .procname = "router_solicitation_delay", | |
3559 | .data = &ipv6_devconf.rtr_solicit_delay, | |
3560 | .maxlen = sizeof(int), | |
3561 | .mode = 0644, | |
3562 | .proc_handler = &proc_dointvec_jiffies, | |
3563 | .strategy = &sysctl_jiffies, | |
3564 | }, | |
3565 | { | |
3566 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3567 | .procname = "force_mld_version", | |
3568 | .data = &ipv6_devconf.force_mld_version, | |
3569 | .maxlen = sizeof(int), | |
3570 | .mode = 0644, | |
3571 | .proc_handler = &proc_dointvec, | |
3572 | }, | |
3573 | #ifdef CONFIG_IPV6_PRIVACY | |
3574 | { | |
3575 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3576 | .procname = "use_tempaddr", | |
3577 | .data = &ipv6_devconf.use_tempaddr, | |
3578 | .maxlen = sizeof(int), | |
3579 | .mode = 0644, | |
3580 | .proc_handler = &proc_dointvec, | |
3581 | }, | |
3582 | { | |
3583 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3584 | .procname = "temp_valid_lft", | |
3585 | .data = &ipv6_devconf.temp_valid_lft, | |
3586 | .maxlen = sizeof(int), | |
3587 | .mode = 0644, | |
3588 | .proc_handler = &proc_dointvec, | |
3589 | }, | |
3590 | { | |
3591 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3592 | .procname = "temp_prefered_lft", | |
3593 | .data = &ipv6_devconf.temp_prefered_lft, | |
3594 | .maxlen = sizeof(int), | |
3595 | .mode = 0644, | |
3596 | .proc_handler = &proc_dointvec, | |
3597 | }, | |
3598 | { | |
3599 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3600 | .procname = "regen_max_retry", | |
3601 | .data = &ipv6_devconf.regen_max_retry, | |
3602 | .maxlen = sizeof(int), | |
3603 | .mode = 0644, | |
3604 | .proc_handler = &proc_dointvec, | |
3605 | }, | |
3606 | { | |
3607 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3608 | .procname = "max_desync_factor", | |
3609 | .data = &ipv6_devconf.max_desync_factor, | |
3610 | .maxlen = sizeof(int), | |
3611 | .mode = 0644, | |
3612 | .proc_handler = &proc_dointvec, | |
3613 | }, | |
3614 | #endif | |
3615 | { | |
3616 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3617 | .procname = "max_addresses", | |
3618 | .data = &ipv6_devconf.max_addresses, | |
3619 | .maxlen = sizeof(int), | |
3620 | .mode = 0644, | |
3621 | .proc_handler = &proc_dointvec, | |
3622 | }, | |
65f5c7c1 YH |
3623 | { |
3624 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3625 | .procname = "accept_ra_defrtr", | |
3626 | .data = &ipv6_devconf.accept_ra_defrtr, | |
3627 | .maxlen = sizeof(int), | |
3628 | .mode = 0644, | |
3629 | .proc_handler = &proc_dointvec, | |
3630 | }, | |
c4fd30eb YH |
3631 | { |
3632 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3633 | .procname = "accept_ra_pinfo", | |
3634 | .data = &ipv6_devconf.accept_ra_pinfo, | |
3635 | .maxlen = sizeof(int), | |
3636 | .mode = 0644, | |
3637 | .proc_handler = &proc_dointvec, | |
3638 | }, | |
930d6ff2 YH |
3639 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3640 | { | |
3641 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3642 | .procname = "accept_ra_rtr_pref", | |
3643 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3644 | .maxlen = sizeof(int), | |
3645 | .mode = 0644, | |
3646 | .proc_handler = &proc_dointvec, | |
3647 | }, | |
52e16356 YH |
3648 | { |
3649 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3650 | .procname = "router_probe_interval", | |
3651 | .data = &ipv6_devconf.rtr_probe_interval, | |
3652 | .maxlen = sizeof(int), | |
3653 | .mode = 0644, | |
3654 | .proc_handler = &proc_dointvec_jiffies, | |
3655 | .strategy = &sysctl_jiffies, | |
3656 | }, | |
09c884d4 YH |
3657 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3658 | { | |
3659 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3660 | .procname = "accept_ra_rt_info_max_plen", | |
3661 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3662 | .maxlen = sizeof(int), | |
3663 | .mode = 0644, | |
3664 | .proc_handler = &proc_dointvec, | |
3665 | }, | |
3666 | #endif | |
930d6ff2 | 3667 | #endif |
1da177e4 LT |
3668 | { |
3669 | .ctl_name = 0, /* sentinel */ | |
3670 | } | |
3671 | }, | |
3672 | .addrconf_dev = { | |
3673 | { | |
3674 | .ctl_name = NET_PROTO_CONF_ALL, | |
3675 | .procname = "all", | |
3676 | .mode = 0555, | |
3677 | .child = addrconf_sysctl.addrconf_vars, | |
3678 | }, | |
3679 | { | |
3680 | .ctl_name = 0, /* sentinel */ | |
3681 | } | |
3682 | }, | |
3683 | .addrconf_conf_dir = { | |
3684 | { | |
3685 | .ctl_name = NET_IPV6_CONF, | |
3686 | .procname = "conf", | |
3687 | .mode = 0555, | |
3688 | .child = addrconf_sysctl.addrconf_dev, | |
3689 | }, | |
3690 | { | |
3691 | .ctl_name = 0, /* sentinel */ | |
3692 | } | |
3693 | }, | |
3694 | .addrconf_proto_dir = { | |
3695 | { | |
3696 | .ctl_name = NET_IPV6, | |
3697 | .procname = "ipv6", | |
3698 | .mode = 0555, | |
3699 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3700 | }, | |
3701 | { | |
3702 | .ctl_name = 0, /* sentinel */ | |
3703 | } | |
3704 | }, | |
3705 | .addrconf_root_dir = { | |
3706 | { | |
3707 | .ctl_name = CTL_NET, | |
3708 | .procname = "net", | |
3709 | .mode = 0555, | |
3710 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3711 | }, | |
3712 | { | |
3713 | .ctl_name = 0, /* sentinel */ | |
3714 | } | |
3715 | }, | |
3716 | }; | |
3717 | ||
3718 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3719 | { | |
3720 | int i; | |
3721 | struct net_device *dev = idev ? idev->dev : NULL; | |
3722 | struct addrconf_sysctl_table *t; | |
3723 | char *dev_name = NULL; | |
3724 | ||
3725 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
3726 | if (t == NULL) | |
3727 | return; | |
3728 | memcpy(t, &addrconf_sysctl, sizeof(*t)); | |
3729 | for (i=0; t->addrconf_vars[i].data; i++) { | |
3730 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
3731 | t->addrconf_vars[i].de = NULL; | |
3732 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
3733 | } | |
3734 | if (dev) { | |
3735 | dev_name = dev->name; | |
3736 | t->addrconf_dev[0].ctl_name = dev->ifindex; | |
3737 | } else { | |
3738 | dev_name = "default"; | |
3739 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3740 | } | |
3741 | ||
3742 | /* | |
3743 | * Make a copy of dev_name, because '.procname' is regarded as const | |
3744 | * by sysctl and we wouldn't want anyone to change it under our feet | |
3745 | * (see SIOCSIFNAME). | |
3746 | */ | |
543537bd | 3747 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3748 | if (!dev_name) |
3749 | goto free; | |
3750 | ||
3751 | t->addrconf_dev[0].procname = dev_name; | |
3752 | ||
3753 | t->addrconf_dev[0].child = t->addrconf_vars; | |
3754 | t->addrconf_dev[0].de = NULL; | |
3755 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
3756 | t->addrconf_conf_dir[0].de = NULL; | |
3757 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
3758 | t->addrconf_proto_dir[0].de = NULL; | |
3759 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
3760 | t->addrconf_root_dir[0].de = NULL; | |
3761 | ||
3762 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
3763 | if (t->sysctl_header == NULL) | |
3764 | goto free_procname; | |
3765 | else | |
3766 | p->sysctl = t; | |
3767 | return; | |
3768 | ||
3769 | /* error path */ | |
3770 | free_procname: | |
3771 | kfree(dev_name); | |
3772 | free: | |
3773 | kfree(t); | |
3774 | ||
3775 | return; | |
3776 | } | |
3777 | ||
3778 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3779 | { | |
3780 | if (p->sysctl) { | |
3781 | struct addrconf_sysctl_table *t = p->sysctl; | |
3782 | p->sysctl = NULL; | |
3783 | unregister_sysctl_table(t->sysctl_header); | |
3784 | kfree(t->addrconf_dev[0].procname); | |
3785 | kfree(t); | |
3786 | } | |
3787 | } | |
3788 | ||
3789 | ||
3790 | #endif | |
3791 | ||
3792 | /* | |
3793 | * Device notifier | |
3794 | */ | |
3795 | ||
3796 | int register_inet6addr_notifier(struct notifier_block *nb) | |
3797 | { | |
e041c683 | 3798 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
3799 | } |
3800 | ||
3801 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
3802 | { | |
e041c683 | 3803 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
3804 | } |
3805 | ||
3806 | /* | |
3807 | * Init / cleanup code | |
3808 | */ | |
3809 | ||
3810 | int __init addrconf_init(void) | |
3811 | { | |
3812 | int err = 0; | |
3813 | ||
3814 | /* The addrconf netdev notifier requires that loopback_dev | |
3815 | * has it's ipv6 private information allocated and setup | |
3816 | * before it can bring up and give link-local addresses | |
3817 | * to other devices which are up. | |
3818 | * | |
3819 | * Unfortunately, loopback_dev is not necessarily the first | |
3820 | * entry in the global dev_base list of net devices. In fact, | |
3821 | * it is likely to be the very last entry on that list. | |
3822 | * So this causes the notifier registry below to try and | |
3823 | * give link-local addresses to all devices besides loopback_dev | |
3824 | * first, then loopback_dev, which cases all the non-loopback_dev | |
3825 | * devices to fail to get a link-local address. | |
3826 | * | |
3827 | * So, as a temporary fix, allocate the ipv6 structure for | |
3828 | * loopback_dev first by hand. | |
3829 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
3830 | * device and it being up should be removed. | |
3831 | */ | |
3832 | rtnl_lock(); | |
3833 | if (!ipv6_add_dev(&loopback_dev)) | |
3834 | err = -ENOMEM; | |
3835 | rtnl_unlock(); | |
3836 | if (err) | |
3837 | return err; | |
3838 | ||
c62dba90 HX |
3839 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
3840 | ||
1da177e4 LT |
3841 | register_netdevice_notifier(&ipv6_dev_notf); |
3842 | ||
1da177e4 LT |
3843 | addrconf_verify(0); |
3844 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
3845 | #ifdef CONFIG_SYSCTL | |
3846 | addrconf_sysctl.sysctl_header = | |
3847 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
3848 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
3849 | #endif | |
3850 | ||
3851 | return 0; | |
3852 | } | |
3853 | ||
3854 | void __exit addrconf_cleanup(void) | |
3855 | { | |
3856 | struct net_device *dev; | |
3857 | struct inet6_dev *idev; | |
3858 | struct inet6_ifaddr *ifa; | |
3859 | int i; | |
3860 | ||
3861 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
3862 | ||
3863 | rtnetlink_links[PF_INET6] = NULL; | |
3864 | #ifdef CONFIG_SYSCTL | |
3865 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
3866 | addrconf_sysctl_unregister(&ipv6_devconf); | |
3867 | #endif | |
3868 | ||
3869 | rtnl_lock(); | |
3870 | ||
3871 | /* | |
3872 | * clean dev list. | |
3873 | */ | |
3874 | ||
3875 | for (dev=dev_base; dev; dev=dev->next) { | |
3876 | if ((idev = __in6_dev_get(dev)) == NULL) | |
3877 | continue; | |
3878 | addrconf_ifdown(dev, 1); | |
3879 | } | |
3880 | addrconf_ifdown(&loopback_dev, 2); | |
3881 | ||
3882 | /* | |
3883 | * Check hash table. | |
3884 | */ | |
3885 | ||
3886 | write_lock_bh(&addrconf_hash_lock); | |
3887 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
3888 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
3889 | struct inet6_ifaddr *bifa; | |
3890 | ||
3891 | bifa = ifa; | |
3892 | ifa = ifa->lst_next; | |
3893 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
3894 | /* Do not free it; something is wrong. | |
3895 | Now we can investigate it with debugger. | |
3896 | */ | |
3897 | } | |
3898 | } | |
3899 | write_unlock_bh(&addrconf_hash_lock); | |
3900 | ||
3901 | del_timer(&addr_chk_timer); | |
3902 | ||
3903 | rtnl_unlock(); | |
3904 | ||
1da177e4 LT |
3905 | #ifdef CONFIG_PROC_FS |
3906 | proc_net_remove("if_inet6"); | |
3907 | #endif | |
3908 | } |