Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
8 | * | |
9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Changes: | |
19 | * | |
20 | * Janos Farkas : delete timer on ifdown | |
21 | * <chexum@bankinf.banki.hu> | |
22 | * Andi Kleen : kill double kfree on module | |
23 | * unload. | |
24 | * Maciej W. Rozycki : FDDI support | |
25 | * sekiya@USAGI : Don't send too many RS | |
26 | * packets. | |
27 | * yoshfuji@USAGI : Fixed interval between DAD | |
28 | * packets. | |
29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
30 | * address validation timer. | |
31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
32 | * support. | |
33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
34 | * address on a same interface. | |
35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
37 | * seq_file. | |
b1cacb68 YH |
38 | * YOSHIFUJI Hideaki @USAGI : improved source address |
39 | * selection; consider scope, | |
40 | * status etc. | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
47 | #include <linux/sched.h> | |
48 | #include <linux/net.h> | |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
58 | #ifdef CONFIG_SYSCTL | |
59 | #include <linux/sysctl.h> | |
60 | #endif | |
4fc268d2 | 61 | #include <linux/capability.h> |
1da177e4 LT |
62 | #include <linux/delay.h> |
63 | #include <linux/notifier.h> | |
543537bd | 64 | #include <linux/string.h> |
1da177e4 LT |
65 | |
66 | #include <net/sock.h> | |
67 | #include <net/snmp.h> | |
68 | ||
69 | #include <net/ipv6.h> | |
70 | #include <net/protocol.h> | |
71 | #include <net/ndisc.h> | |
72 | #include <net/ip6_route.h> | |
73 | #include <net/addrconf.h> | |
74 | #include <net/tcp.h> | |
75 | #include <net/ip.h> | |
5d620266 | 76 | #include <net/netlink.h> |
1da177e4 LT |
77 | #include <linux/if_tunnel.h> |
78 | #include <linux/rtnetlink.h> | |
79 | ||
80 | #ifdef CONFIG_IPV6_PRIVACY | |
81 | #include <linux/random.h> | |
1da177e4 LT |
82 | #endif |
83 | ||
84 | #include <asm/uaccess.h> | |
85 | ||
86 | #include <linux/proc_fs.h> | |
87 | #include <linux/seq_file.h> | |
88 | ||
89 | /* Set to 3 to get tracing... */ | |
90 | #define ACONF_DEBUG 2 | |
91 | ||
92 | #if ACONF_DEBUG >= 3 | |
93 | #define ADBG(x) printk x | |
94 | #else | |
95 | #define ADBG(x) | |
96 | #endif | |
97 | ||
98 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
99 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) | |
100 | ||
101 | #ifdef CONFIG_SYSCTL | |
102 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); | |
103 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); | |
104 | #endif | |
105 | ||
106 | #ifdef CONFIG_IPV6_PRIVACY | |
107 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
108 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
109 | static void ipv6_regen_rndid(unsigned long data); | |
110 | ||
111 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; | |
1da177e4 LT |
112 | #endif |
113 | ||
114 | static int ipv6_count_addresses(struct inet6_dev *idev); | |
115 | ||
116 | /* | |
117 | * Configured unicast address hash table | |
118 | */ | |
119 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; | |
120 | static DEFINE_RWLOCK(addrconf_hash_lock); | |
121 | ||
122 | /* Protects inet6 devices */ | |
123 | DEFINE_RWLOCK(addrconf_lock); | |
124 | ||
125 | static void addrconf_verify(unsigned long); | |
126 | ||
8d06afab | 127 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
128 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
129 | ||
130 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
131 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
132 | ||
133 | static int addrconf_ifdown(struct net_device *dev, int how); | |
134 | ||
e431b8c0 | 135 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
1da177e4 LT |
136 | static void addrconf_dad_timer(unsigned long data); |
137 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 138 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
139 | static void addrconf_rs_timer(unsigned long data); |
140 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
141 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
142 | ||
143 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
144 | struct prefix_info *pinfo); | |
145 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); | |
146 | ||
e041c683 | 147 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 148 | |
ab32ea5d | 149 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
150 | .forwarding = 0, |
151 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
152 | .mtu6 = IPV6_MIN_MTU, | |
153 | .accept_ra = 1, | |
154 | .accept_redirects = 1, | |
155 | .autoconf = 1, | |
156 | .force_mld_version = 0, | |
157 | .dad_transmits = 1, | |
158 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
159 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
160 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
161 | #ifdef CONFIG_IPV6_PRIVACY | |
162 | .use_tempaddr = 0, | |
163 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
164 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
165 | .regen_max_retry = REGEN_MAX_RETRY, | |
166 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
167 | #endif | |
168 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 169 | .accept_ra_defrtr = 1, |
c4fd30eb | 170 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
171 | #ifdef CONFIG_IPV6_ROUTER_PREF |
172 | .accept_ra_rtr_pref = 1, | |
52e16356 | 173 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
174 | #ifdef CONFIG_IPV6_ROUTE_INFO |
175 | .accept_ra_rt_info_max_plen = 0, | |
176 | #endif | |
930d6ff2 | 177 | #endif |
1da177e4 LT |
178 | }; |
179 | ||
ab32ea5d | 180 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
181 | .forwarding = 0, |
182 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
183 | .mtu6 = IPV6_MIN_MTU, | |
184 | .accept_ra = 1, | |
185 | .accept_redirects = 1, | |
186 | .autoconf = 1, | |
187 | .dad_transmits = 1, | |
188 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
189 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
190 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
191 | #ifdef CONFIG_IPV6_PRIVACY | |
192 | .use_tempaddr = 0, | |
193 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
194 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
195 | .regen_max_retry = REGEN_MAX_RETRY, | |
196 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
197 | #endif | |
198 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 199 | .accept_ra_defrtr = 1, |
c4fd30eb | 200 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
201 | #ifdef CONFIG_IPV6_ROUTER_PREF |
202 | .accept_ra_rtr_pref = 1, | |
52e16356 | 203 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
205 | .accept_ra_rt_info_max_plen = 0, | |
206 | #endif | |
930d6ff2 | 207 | #endif |
1da177e4 LT |
208 | }; |
209 | ||
210 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
211 | #if 0 | |
212 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
213 | #endif | |
214 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
215 | ||
b1cacb68 YH |
216 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) |
217 | ||
218 | static inline unsigned ipv6_addr_scope2type(unsigned scope) | |
219 | { | |
220 | switch(scope) { | |
221 | case IPV6_ADDR_SCOPE_NODELOCAL: | |
222 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
223 | IPV6_ADDR_LOOPBACK); | |
224 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
225 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
226 | IPV6_ADDR_LINKLOCAL); | |
227 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
228 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
229 | IPV6_ADDR_SITELOCAL); | |
230 | } | |
231 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
232 | } | |
233 | ||
234 | int __ipv6_addr_type(const struct in6_addr *addr) | |
1da177e4 | 235 | { |
1da177e4 LT |
236 | u32 st; |
237 | ||
238 | st = addr->s6_addr32[0]; | |
239 | ||
1da177e4 | 240 | /* Consider all addresses with the first three bits different of |
b1cacb68 | 241 | 000 and 111 as unicasts. |
1da177e4 LT |
242 | */ |
243 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
244 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
b1cacb68 YH |
245 | return (IPV6_ADDR_UNICAST | |
246 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
1da177e4 | 247 | |
b1cacb68 YH |
248 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { |
249 | /* multicast */ | |
250 | /* addr-select 3.1 */ | |
251 | return (IPV6_ADDR_MULTICAST | | |
252 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
253 | } | |
254 | ||
255 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
256 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
257 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
1da177e4 | 258 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) |
b1cacb68 YH |
259 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | |
260 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
1da177e4 LT |
261 | |
262 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
263 | if (addr->s6_addr32[2] == 0) { | |
264 | if (addr->s6_addr32[3] == 0) | |
265 | return IPV6_ADDR_ANY; | |
266 | ||
267 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
b1cacb68 YH |
268 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | |
269 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
1da177e4 | 270 | |
b1cacb68 YH |
271 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | |
272 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
273 | } |
274 | ||
275 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
b1cacb68 YH |
276 | return (IPV6_ADDR_MAPPED | |
277 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
1da177e4 LT |
278 | } |
279 | ||
b1cacb68 YH |
280 | return (IPV6_ADDR_RESERVED | |
281 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ | |
1da177e4 LT |
282 | } |
283 | ||
284 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) | |
285 | { | |
286 | if (del_timer(&ifp->timer)) | |
287 | __in6_ifa_put(ifp); | |
288 | } | |
289 | ||
290 | enum addrconf_timer_t | |
291 | { | |
292 | AC_NONE, | |
293 | AC_DAD, | |
294 | AC_RS, | |
295 | }; | |
296 | ||
297 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
298 | enum addrconf_timer_t what, | |
299 | unsigned long when) | |
300 | { | |
301 | if (!del_timer(&ifp->timer)) | |
302 | in6_ifa_hold(ifp); | |
303 | ||
304 | switch (what) { | |
305 | case AC_DAD: | |
306 | ifp->timer.function = addrconf_dad_timer; | |
307 | break; | |
308 | case AC_RS: | |
309 | ifp->timer.function = addrconf_rs_timer; | |
310 | break; | |
311 | default:; | |
312 | } | |
313 | ifp->timer.expires = jiffies + when; | |
314 | add_timer(&ifp->timer); | |
315 | } | |
316 | ||
317 | /* Nobody refers to this device, we may destroy it. */ | |
318 | ||
319 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
320 | { | |
321 | struct net_device *dev = idev->dev; | |
322 | BUG_TRAP(idev->addr_list==NULL); | |
323 | BUG_TRAP(idev->mc_list==NULL); | |
324 | #ifdef NET_REFCNT_DEBUG | |
325 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); | |
326 | #endif | |
327 | dev_put(dev); | |
328 | if (!idev->dead) { | |
329 | printk("Freeing alive inet6 device %p\n", idev); | |
330 | return; | |
331 | } | |
332 | snmp6_free_dev(idev); | |
333 | kfree(idev); | |
334 | } | |
335 | ||
336 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) | |
337 | { | |
338 | struct inet6_dev *ndev; | |
339 | ||
340 | ASSERT_RTNL(); | |
341 | ||
342 | if (dev->mtu < IPV6_MIN_MTU) | |
343 | return NULL; | |
344 | ||
322f74a4 IO |
345 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
346 | ||
347 | if (ndev == NULL) | |
348 | return NULL; | |
349 | ||
350 | rwlock_init(&ndev->lock); | |
351 | ndev->dev = dev; | |
352 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); | |
353 | ndev->cnf.mtu6 = dev->mtu; | |
354 | ndev->cnf.sysctl = NULL; | |
355 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
356 | if (ndev->nd_parms == NULL) { | |
357 | kfree(ndev); | |
358 | return NULL; | |
359 | } | |
360 | /* We refer to the device */ | |
361 | dev_hold(dev); | |
1da177e4 | 362 | |
322f74a4 IO |
363 | if (snmp6_alloc_dev(ndev) < 0) { |
364 | ADBG((KERN_WARNING | |
365 | "%s(): cannot allocate memory for statistics; dev=%s.\n", | |
366 | __FUNCTION__, dev->name)); | |
367 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
368 | ndev->dead = 1; | |
369 | in6_dev_finish_destroy(ndev); | |
370 | return NULL; | |
371 | } | |
1da177e4 | 372 | |
322f74a4 IO |
373 | if (snmp6_register_dev(ndev) < 0) { |
374 | ADBG((KERN_WARNING | |
375 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", | |
376 | __FUNCTION__, dev->name)); | |
377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
378 | ndev->dead = 1; | |
379 | in6_dev_finish_destroy(ndev); | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | /* One reference from device. We must do this before | |
384 | * we invoke __ipv6_regen_rndid(). | |
385 | */ | |
386 | in6_dev_hold(ndev); | |
1da177e4 LT |
387 | |
388 | #ifdef CONFIG_IPV6_PRIVACY | |
322f74a4 IO |
389 | init_timer(&ndev->regen_timer); |
390 | ndev->regen_timer.function = ipv6_regen_rndid; | |
391 | ndev->regen_timer.data = (unsigned long) ndev; | |
392 | if ((dev->flags&IFF_LOOPBACK) || | |
393 | dev->type == ARPHRD_TUNNEL || | |
394 | dev->type == ARPHRD_NONE || | |
395 | dev->type == ARPHRD_SIT) { | |
396 | printk(KERN_INFO | |
397 | "%s: Disabled Privacy Extensions\n", | |
398 | dev->name); | |
399 | ndev->cnf.use_tempaddr = -1; | |
400 | } else { | |
401 | in6_dev_hold(ndev); | |
402 | ipv6_regen_rndid((unsigned long) ndev); | |
403 | } | |
1da177e4 LT |
404 | #endif |
405 | ||
322f74a4 IO |
406 | if (netif_carrier_ok(dev)) |
407 | ndev->if_flags |= IF_READY; | |
3c21edbd | 408 | |
322f74a4 IO |
409 | write_lock_bh(&addrconf_lock); |
410 | dev->ip6_ptr = ndev; | |
411 | write_unlock_bh(&addrconf_lock); | |
1da177e4 | 412 | |
322f74a4 IO |
413 | ipv6_mc_init_dev(ndev); |
414 | ndev->tstamp = jiffies; | |
1da177e4 | 415 | #ifdef CONFIG_SYSCTL |
322f74a4 IO |
416 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
417 | NET_IPV6_NEIGH, "ipv6", | |
418 | &ndisc_ifinfo_sysctl_change, | |
419 | NULL); | |
420 | addrconf_sysctl_register(ndev, &ndev->cnf); | |
1da177e4 | 421 | #endif |
1da177e4 LT |
422 | return ndev; |
423 | } | |
424 | ||
425 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) | |
426 | { | |
427 | struct inet6_dev *idev; | |
428 | ||
429 | ASSERT_RTNL(); | |
430 | ||
431 | if ((idev = __in6_dev_get(dev)) == NULL) { | |
432 | if ((idev = ipv6_add_dev(dev)) == NULL) | |
433 | return NULL; | |
434 | } | |
c5e33bdd | 435 | |
1da177e4 LT |
436 | if (dev->flags&IFF_UP) |
437 | ipv6_mc_up(idev); | |
438 | return idev; | |
439 | } | |
440 | ||
441 | #ifdef CONFIG_SYSCTL | |
442 | static void dev_forward_change(struct inet6_dev *idev) | |
443 | { | |
444 | struct net_device *dev; | |
445 | struct inet6_ifaddr *ifa; | |
446 | struct in6_addr addr; | |
447 | ||
448 | if (!idev) | |
449 | return; | |
450 | dev = idev->dev; | |
451 | if (dev && (dev->flags & IFF_MULTICAST)) { | |
452 | ipv6_addr_all_routers(&addr); | |
453 | ||
454 | if (idev->cnf.forwarding) | |
455 | ipv6_dev_mc_inc(dev, &addr); | |
456 | else | |
457 | ipv6_dev_mc_dec(dev, &addr); | |
458 | } | |
459 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
460 | if (idev->cnf.forwarding) | |
461 | addrconf_join_anycast(ifa); | |
462 | else | |
463 | addrconf_leave_anycast(ifa); | |
464 | } | |
465 | } | |
466 | ||
467 | ||
468 | static void addrconf_forward_change(void) | |
469 | { | |
470 | struct net_device *dev; | |
471 | struct inet6_dev *idev; | |
472 | ||
473 | read_lock(&dev_base_lock); | |
474 | for (dev=dev_base; dev; dev=dev->next) { | |
475 | read_lock(&addrconf_lock); | |
476 | idev = __in6_dev_get(dev); | |
477 | if (idev) { | |
478 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); | |
479 | idev->cnf.forwarding = ipv6_devconf.forwarding; | |
480 | if (changed) | |
481 | dev_forward_change(idev); | |
482 | } | |
483 | read_unlock(&addrconf_lock); | |
484 | } | |
485 | read_unlock(&dev_base_lock); | |
486 | } | |
487 | #endif | |
488 | ||
489 | /* Nobody refers to this ifaddr, destroy it */ | |
490 | ||
491 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) | |
492 | { | |
493 | BUG_TRAP(ifp->if_next==NULL); | |
494 | BUG_TRAP(ifp->lst_next==NULL); | |
495 | #ifdef NET_REFCNT_DEBUG | |
496 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); | |
497 | #endif | |
498 | ||
499 | in6_dev_put(ifp->idev); | |
500 | ||
501 | if (del_timer(&ifp->timer)) | |
502 | printk("Timer is still running, when freeing ifa=%p\n", ifp); | |
503 | ||
504 | if (!ifp->dead) { | |
505 | printk("Freeing alive inet6 address %p\n", ifp); | |
506 | return; | |
507 | } | |
508 | dst_release(&ifp->rt->u.dst); | |
509 | ||
510 | kfree(ifp); | |
511 | } | |
512 | ||
e55ffac6 BH |
513 | static void |
514 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
515 | { | |
516 | struct inet6_ifaddr *ifa, **ifap; | |
8a6ce0c0 | 517 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
518 | |
519 | /* | |
520 | * Each device address list is sorted in order of scope - | |
521 | * global before linklocal. | |
522 | */ | |
523 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; | |
524 | ifap = &ifa->if_next) { | |
8a6ce0c0 | 525 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
526 | break; |
527 | } | |
528 | ||
529 | ifp->if_next = *ifap; | |
530 | *ifap = ifp; | |
531 | } | |
532 | ||
1da177e4 LT |
533 | /* On success it returns ifp with increased reference count */ |
534 | ||
535 | static struct inet6_ifaddr * | |
536 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 537 | int scope, u32 flags) |
1da177e4 LT |
538 | { |
539 | struct inet6_ifaddr *ifa = NULL; | |
540 | struct rt6_info *rt; | |
541 | int hash; | |
542 | int err = 0; | |
543 | ||
544 | read_lock_bh(&addrconf_lock); | |
545 | if (idev->dead) { | |
546 | err = -ENODEV; /*XXX*/ | |
547 | goto out2; | |
548 | } | |
549 | ||
550 | write_lock(&addrconf_hash_lock); | |
551 | ||
552 | /* Ignore adding duplicate addresses on an interface */ | |
553 | if (ipv6_chk_same_addr(addr, idev->dev)) { | |
554 | ADBG(("ipv6_add_addr: already assigned\n")); | |
555 | err = -EEXIST; | |
556 | goto out; | |
557 | } | |
558 | ||
322f74a4 | 559 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
560 | |
561 | if (ifa == NULL) { | |
562 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
563 | err = -ENOBUFS; | |
564 | goto out; | |
565 | } | |
566 | ||
567 | rt = addrconf_dst_alloc(idev, addr, 0); | |
568 | if (IS_ERR(rt)) { | |
569 | err = PTR_ERR(rt); | |
570 | goto out; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | ipv6_addr_copy(&ifa->addr, addr); |
574 | ||
575 | spin_lock_init(&ifa->lock); | |
576 | init_timer(&ifa->timer); | |
577 | ifa->timer.data = (unsigned long) ifa; | |
578 | ifa->scope = scope; | |
579 | ifa->prefix_len = pfxlen; | |
580 | ifa->flags = flags | IFA_F_TENTATIVE; | |
581 | ifa->cstamp = ifa->tstamp = jiffies; | |
582 | ||
57f5f544 KF |
583 | ifa->rt = rt; |
584 | ||
1da177e4 LT |
585 | ifa->idev = idev; |
586 | in6_dev_hold(idev); | |
587 | /* For caller */ | |
588 | in6_ifa_hold(ifa); | |
589 | ||
590 | /* Add to big hash table */ | |
591 | hash = ipv6_addr_hash(addr); | |
592 | ||
593 | ifa->lst_next = inet6_addr_lst[hash]; | |
594 | inet6_addr_lst[hash] = ifa; | |
595 | in6_ifa_hold(ifa); | |
596 | write_unlock(&addrconf_hash_lock); | |
597 | ||
598 | write_lock(&idev->lock); | |
599 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 600 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
601 | |
602 | #ifdef CONFIG_IPV6_PRIVACY | |
603 | if (ifa->flags&IFA_F_TEMPORARY) { | |
604 | ifa->tmp_next = idev->tempaddr_list; | |
605 | idev->tempaddr_list = ifa; | |
606 | in6_ifa_hold(ifa); | |
607 | } | |
608 | #endif | |
609 | ||
1da177e4 LT |
610 | in6_ifa_hold(ifa); |
611 | write_unlock(&idev->lock); | |
612 | out2: | |
613 | read_unlock_bh(&addrconf_lock); | |
614 | ||
fd92833a | 615 | if (likely(err == 0)) |
e041c683 | 616 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
617 | else { |
618 | kfree(ifa); | |
619 | ifa = ERR_PTR(err); | |
620 | } | |
621 | ||
622 | return ifa; | |
623 | out: | |
624 | write_unlock(&addrconf_hash_lock); | |
625 | goto out2; | |
626 | } | |
627 | ||
628 | /* This function wants to get referenced ifp and releases it before return */ | |
629 | ||
630 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
631 | { | |
632 | struct inet6_ifaddr *ifa, **ifap; | |
633 | struct inet6_dev *idev = ifp->idev; | |
634 | int hash; | |
635 | int deleted = 0, onlink = 0; | |
636 | unsigned long expires = jiffies; | |
637 | ||
638 | hash = ipv6_addr_hash(&ifp->addr); | |
639 | ||
640 | ifp->dead = 1; | |
641 | ||
642 | write_lock_bh(&addrconf_hash_lock); | |
643 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; | |
644 | ifap = &ifa->lst_next) { | |
645 | if (ifa == ifp) { | |
646 | *ifap = ifa->lst_next; | |
647 | __in6_ifa_put(ifp); | |
648 | ifa->lst_next = NULL; | |
649 | break; | |
650 | } | |
651 | } | |
652 | write_unlock_bh(&addrconf_hash_lock); | |
653 | ||
654 | write_lock_bh(&idev->lock); | |
655 | #ifdef CONFIG_IPV6_PRIVACY | |
656 | if (ifp->flags&IFA_F_TEMPORARY) { | |
657 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; | |
658 | ifap = &ifa->tmp_next) { | |
659 | if (ifa == ifp) { | |
660 | *ifap = ifa->tmp_next; | |
661 | if (ifp->ifpub) { | |
662 | in6_ifa_put(ifp->ifpub); | |
663 | ifp->ifpub = NULL; | |
664 | } | |
665 | __in6_ifa_put(ifp); | |
666 | ifa->tmp_next = NULL; | |
667 | break; | |
668 | } | |
669 | } | |
670 | } | |
671 | #endif | |
672 | ||
1d142804 | 673 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
1da177e4 LT |
674 | if (ifa == ifp) { |
675 | *ifap = ifa->if_next; | |
676 | __in6_ifa_put(ifp); | |
677 | ifa->if_next = NULL; | |
678 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) | |
679 | break; | |
680 | deleted = 1; | |
1d142804 | 681 | continue; |
1da177e4 LT |
682 | } else if (ifp->flags & IFA_F_PERMANENT) { |
683 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
684 | ifp->prefix_len)) { | |
685 | if (ifa->flags & IFA_F_PERMANENT) { | |
686 | onlink = 1; | |
687 | if (deleted) | |
688 | break; | |
689 | } else { | |
690 | unsigned long lifetime; | |
691 | ||
692 | if (!onlink) | |
693 | onlink = -1; | |
694 | ||
695 | spin_lock(&ifa->lock); | |
696 | lifetime = min_t(unsigned long, | |
697 | ifa->valid_lft, 0x7fffffffUL/HZ); | |
698 | if (time_before(expires, | |
699 | ifa->tstamp + lifetime * HZ)) | |
700 | expires = ifa->tstamp + lifetime * HZ; | |
701 | spin_unlock(&ifa->lock); | |
702 | } | |
703 | } | |
704 | } | |
1d142804 | 705 | ifap = &ifa->if_next; |
1da177e4 LT |
706 | } |
707 | write_unlock_bh(&idev->lock); | |
708 | ||
709 | ipv6_ifa_notify(RTM_DELADDR, ifp); | |
710 | ||
e041c683 | 711 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 LT |
712 | |
713 | addrconf_del_timer(ifp); | |
714 | ||
715 | /* | |
716 | * Purge or update corresponding prefix | |
717 | * | |
718 | * 1) we don't purge prefix here if address was not permanent. | |
719 | * prefix is managed by its own lifetime. | |
720 | * 2) if there're no addresses, delete prefix. | |
721 | * 3) if there're still other permanent address(es), | |
722 | * corresponding prefix is still permanent. | |
723 | * 4) otherwise, update prefix lifetime to the | |
724 | * longest valid lifetime among the corresponding | |
725 | * addresses on the device. | |
726 | * Note: subsequent RA will update lifetime. | |
727 | * | |
728 | * --yoshfuji | |
729 | */ | |
730 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
731 | struct in6_addr prefix; | |
732 | struct rt6_info *rt; | |
733 | ||
734 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); | |
735 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); | |
736 | ||
737 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
738 | if (onlink == 0) { | |
e0a1ad73 | 739 | ip6_del_rt(rt); |
1da177e4 LT |
740 | rt = NULL; |
741 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
742 | rt->rt6i_expires = expires; | |
743 | rt->rt6i_flags |= RTF_EXPIRES; | |
744 | } | |
745 | } | |
746 | dst_release(&rt->u.dst); | |
747 | } | |
748 | ||
749 | in6_ifa_put(ifp); | |
750 | } | |
751 | ||
752 | #ifdef CONFIG_IPV6_PRIVACY | |
753 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
754 | { | |
755 | struct inet6_dev *idev = ifp->idev; | |
756 | struct in6_addr addr, *tmpaddr; | |
757 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; | |
758 | int tmp_plen; | |
759 | int ret = 0; | |
760 | int max_addresses; | |
761 | ||
762 | write_lock(&idev->lock); | |
763 | if (ift) { | |
764 | spin_lock_bh(&ift->lock); | |
765 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
766 | spin_unlock_bh(&ift->lock); | |
767 | tmpaddr = &addr; | |
768 | } else { | |
769 | tmpaddr = NULL; | |
770 | } | |
771 | retry: | |
772 | in6_dev_hold(idev); | |
773 | if (idev->cnf.use_tempaddr <= 0) { | |
774 | write_unlock(&idev->lock); | |
775 | printk(KERN_INFO | |
776 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); | |
777 | in6_dev_put(idev); | |
778 | ret = -1; | |
779 | goto out; | |
780 | } | |
781 | spin_lock_bh(&ifp->lock); | |
782 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
783 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
784 | spin_unlock_bh(&ifp->lock); | |
785 | write_unlock(&idev->lock); | |
786 | printk(KERN_WARNING | |
787 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); | |
788 | in6_dev_put(idev); | |
789 | ret = -1; | |
790 | goto out; | |
791 | } | |
792 | in6_ifa_hold(ifp); | |
793 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
794 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
795 | spin_unlock_bh(&ifp->lock); | |
796 | write_unlock(&idev->lock); | |
797 | printk(KERN_WARNING | |
798 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); | |
799 | in6_ifa_put(ifp); | |
800 | in6_dev_put(idev); | |
801 | ret = -1; | |
802 | goto out; | |
803 | } | |
804 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
805 | tmp_valid_lft = min_t(__u32, | |
806 | ifp->valid_lft, | |
807 | idev->cnf.temp_valid_lft); | |
808 | tmp_prefered_lft = min_t(__u32, | |
809 | ifp->prefered_lft, | |
810 | idev->cnf.temp_prefered_lft - desync_factor / HZ); | |
811 | tmp_plen = ifp->prefix_len; | |
812 | max_addresses = idev->cnf.max_addresses; | |
813 | tmp_cstamp = ifp->cstamp; | |
814 | tmp_tstamp = ifp->tstamp; | |
815 | spin_unlock_bh(&ifp->lock); | |
816 | ||
817 | write_unlock(&idev->lock); | |
818 | ift = !max_addresses || | |
819 | ipv6_count_addresses(idev) < max_addresses ? | |
820 | ipv6_add_addr(idev, &addr, tmp_plen, | |
821 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; | |
822 | if (!ift || IS_ERR(ift)) { | |
823 | in6_ifa_put(ifp); | |
824 | in6_dev_put(idev); | |
825 | printk(KERN_INFO | |
826 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); | |
827 | tmpaddr = &addr; | |
828 | write_lock(&idev->lock); | |
829 | goto retry; | |
830 | } | |
831 | ||
832 | spin_lock_bh(&ift->lock); | |
833 | ift->ifpub = ifp; | |
834 | ift->valid_lft = tmp_valid_lft; | |
835 | ift->prefered_lft = tmp_prefered_lft; | |
836 | ift->cstamp = tmp_cstamp; | |
837 | ift->tstamp = tmp_tstamp; | |
838 | spin_unlock_bh(&ift->lock); | |
839 | ||
840 | addrconf_dad_start(ift, 0); | |
841 | in6_ifa_put(ift); | |
842 | in6_dev_put(idev); | |
843 | out: | |
844 | return ret; | |
845 | } | |
846 | #endif | |
847 | ||
848 | /* | |
072047e4 | 849 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 850 | */ |
072047e4 YH |
851 | struct ipv6_saddr_score { |
852 | int addr_type; | |
853 | unsigned int attrs; | |
854 | int matchlen; | |
0d27b427 | 855 | int scope; |
072047e4 YH |
856 | unsigned int rule; |
857 | }; | |
858 | ||
859 | #define IPV6_SADDR_SCORE_LOCAL 0x0001 | |
860 | #define IPV6_SADDR_SCORE_PREFERRED 0x0004 | |
861 | #define IPV6_SADDR_SCORE_HOA 0x0008 | |
862 | #define IPV6_SADDR_SCORE_OIF 0x0010 | |
863 | #define IPV6_SADDR_SCORE_LABEL 0x0020 | |
864 | #define IPV6_SADDR_SCORE_PRIVACY 0x0040 | |
865 | ||
866 | static int inline ipv6_saddr_preferred(int type) | |
1da177e4 | 867 | { |
072047e4 YH |
868 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
869 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) | |
870 | return 1; | |
871 | return 0; | |
1da177e4 LT |
872 | } |
873 | ||
072047e4 YH |
874 | /* static matching label */ |
875 | static int inline ipv6_saddr_label(const struct in6_addr *addr, int type) | |
876 | { | |
877 | /* | |
878 | * prefix (longest match) label | |
879 | * ----------------------------- | |
880 | * ::1/128 0 | |
881 | * ::/0 1 | |
882 | * 2002::/16 2 | |
883 | * ::/96 3 | |
884 | * ::ffff:0:0/96 4 | |
102128e3 ŁS |
885 | * fc00::/7 5 |
886 | * 2001::/32 6 | |
072047e4 YH |
887 | */ |
888 | if (type & IPV6_ADDR_LOOPBACK) | |
889 | return 0; | |
890 | else if (type & IPV6_ADDR_COMPATv4) | |
891 | return 3; | |
892 | else if (type & IPV6_ADDR_MAPPED) | |
893 | return 4; | |
102128e3 ŁS |
894 | else if (addr->s6_addr32[0] == htonl(0x20010000)) |
895 | return 6; | |
072047e4 YH |
896 | else if (addr->s6_addr16[0] == htons(0x2002)) |
897 | return 2; | |
102128e3 ŁS |
898 | else if ((addr->s6_addr[0] & 0xfe) == 0xfc) |
899 | return 5; | |
072047e4 YH |
900 | return 1; |
901 | } | |
1da177e4 | 902 | |
072047e4 | 903 | int ipv6_dev_get_saddr(struct net_device *daddr_dev, |
1da177e4 LT |
904 | struct in6_addr *daddr, struct in6_addr *saddr) |
905 | { | |
072047e4 YH |
906 | struct ipv6_saddr_score hiscore; |
907 | struct inet6_ifaddr *ifa_result = NULL; | |
908 | int daddr_type = __ipv6_addr_type(daddr); | |
909 | int daddr_scope = __ipv6_addr_src_scope(daddr_type); | |
910 | u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); | |
911 | struct net_device *dev; | |
1da177e4 | 912 | |
072047e4 | 913 | memset(&hiscore, 0, sizeof(hiscore)); |
1da177e4 | 914 | |
072047e4 YH |
915 | read_lock(&dev_base_lock); |
916 | read_lock(&addrconf_lock); | |
1da177e4 | 917 | |
072047e4 YH |
918 | for (dev = dev_base; dev; dev=dev->next) { |
919 | struct inet6_dev *idev; | |
920 | struct inet6_ifaddr *ifa; | |
921 | ||
922 | /* Rule 0: Candidate Source Address (section 4) | |
923 | * - multicast and link-local destination address, | |
924 | * the set of candidate source address MUST only | |
925 | * include addresses assigned to interfaces | |
926 | * belonging to the same link as the outgoing | |
927 | * interface. | |
928 | * (- For site-local destination addresses, the | |
929 | * set of candidate source addresses MUST only | |
930 | * include addresses assigned to interfaces | |
931 | * belonging to the same site as the outgoing | |
932 | * interface.) | |
933 | */ | |
934 | if ((daddr_type & IPV6_ADDR_MULTICAST || | |
935 | daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
936 | daddr_dev && dev != daddr_dev) | |
937 | continue; | |
1da177e4 | 938 | |
1da177e4 | 939 | idev = __in6_dev_get(dev); |
072047e4 YH |
940 | if (!idev) |
941 | continue; | |
942 | ||
943 | read_lock_bh(&idev->lock); | |
944 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { | |
945 | struct ipv6_saddr_score score; | |
946 | ||
947 | score.addr_type = __ipv6_addr_type(&ifa->addr); | |
948 | ||
6b3ae80a YH |
949 | /* Rule 0: |
950 | * - Tentative Address (RFC2462 section 5.4) | |
951 | * - A tentative address is not considered | |
952 | * "assigned to an interface" in the traditional | |
953 | * sense. | |
954 | * - Candidate Source Address (section 4) | |
072047e4 YH |
955 | * - In any case, anycast addresses, multicast |
956 | * addresses, and the unspecified address MUST | |
957 | * NOT be included in a candidate set. | |
958 | */ | |
6b3ae80a YH |
959 | if (ifa->flags & IFA_F_TENTATIVE) |
960 | continue; | |
072047e4 YH |
961 | if (unlikely(score.addr_type == IPV6_ADDR_ANY || |
962 | score.addr_type & IPV6_ADDR_MULTICAST)) { | |
963 | LIMIT_NETDEBUG(KERN_DEBUG | |
964 | "ADDRCONF: unspecified / multicast address" | |
965 | "assigned as unicast address on %s", | |
966 | dev->name); | |
967 | continue; | |
968 | } | |
969 | ||
970 | score.attrs = 0; | |
971 | score.matchlen = 0; | |
972 | score.scope = 0; | |
973 | score.rule = 0; | |
974 | ||
975 | if (ifa_result == NULL) { | |
976 | /* record it if the first available entry */ | |
977 | goto record_it; | |
978 | } | |
979 | ||
980 | /* Rule 1: Prefer same address */ | |
981 | if (hiscore.rule < 1) { | |
982 | if (ipv6_addr_equal(&ifa_result->addr, daddr)) | |
983 | hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
984 | hiscore.rule++; | |
985 | } | |
986 | if (ipv6_addr_equal(&ifa->addr, daddr)) { | |
987 | score.attrs |= IPV6_SADDR_SCORE_LOCAL; | |
988 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { | |
989 | score.rule = 1; | |
990 | goto record_it; | |
1da177e4 | 991 | } |
072047e4 YH |
992 | } else { |
993 | if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) | |
994 | continue; | |
1da177e4 | 995 | } |
1da177e4 | 996 | |
072047e4 YH |
997 | /* Rule 2: Prefer appropriate scope */ |
998 | if (hiscore.rule < 2) { | |
999 | hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); | |
1000 | hiscore.rule++; | |
1001 | } | |
1002 | score.scope = __ipv6_addr_src_scope(score.addr_type); | |
1003 | if (hiscore.scope < score.scope) { | |
1004 | if (hiscore.scope < daddr_scope) { | |
1005 | score.rule = 2; | |
1006 | goto record_it; | |
1007 | } else | |
1008 | continue; | |
1009 | } else if (score.scope < hiscore.scope) { | |
1010 | if (score.scope < daddr_scope) | |
e55ffac6 | 1011 | break; /* addresses sorted by scope */ |
072047e4 YH |
1012 | else { |
1013 | score.rule = 2; | |
1014 | goto record_it; | |
1015 | } | |
1016 | } | |
1da177e4 | 1017 | |
072047e4 YH |
1018 | /* Rule 3: Avoid deprecated address */ |
1019 | if (hiscore.rule < 3) { | |
1020 | if (ipv6_saddr_preferred(hiscore.addr_type) || | |
1021 | !(ifa_result->flags & IFA_F_DEPRECATED)) | |
1022 | hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1023 | hiscore.rule++; | |
1024 | } | |
1025 | if (ipv6_saddr_preferred(score.addr_type) || | |
1026 | !(ifa->flags & IFA_F_DEPRECATED)) { | |
1027 | score.attrs |= IPV6_SADDR_SCORE_PREFERRED; | |
1028 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { | |
1029 | score.rule = 3; | |
1030 | goto record_it; | |
1031 | } | |
1032 | } else { | |
1033 | if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) | |
1034 | continue; | |
1035 | } | |
1da177e4 | 1036 | |
072047e4 | 1037 | /* Rule 4: Prefer home address -- not implemented yet */ |
220bbd74 YH |
1038 | if (hiscore.rule < 4) |
1039 | hiscore.rule++; | |
072047e4 YH |
1040 | |
1041 | /* Rule 5: Prefer outgoing interface */ | |
1042 | if (hiscore.rule < 5) { | |
1043 | if (daddr_dev == NULL || | |
1044 | daddr_dev == ifa_result->idev->dev) | |
1045 | hiscore.attrs |= IPV6_SADDR_SCORE_OIF; | |
1046 | hiscore.rule++; | |
1047 | } | |
1048 | if (daddr_dev == NULL || | |
1049 | daddr_dev == ifa->idev->dev) { | |
1050 | score.attrs |= IPV6_SADDR_SCORE_OIF; | |
1051 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { | |
1052 | score.rule = 5; | |
1053 | goto record_it; | |
1054 | } | |
1055 | } else { | |
1056 | if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) | |
1057 | continue; | |
1058 | } | |
1059 | ||
1060 | /* Rule 6: Prefer matching label */ | |
1061 | if (hiscore.rule < 6) { | |
1062 | if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) | |
1063 | hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1064 | hiscore.rule++; | |
1065 | } | |
1066 | if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { | |
1067 | score.attrs |= IPV6_SADDR_SCORE_LABEL; | |
1068 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { | |
1069 | score.rule = 6; | |
1070 | goto record_it; | |
1da177e4 | 1071 | } |
072047e4 YH |
1072 | } else { |
1073 | if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) | |
1074 | continue; | |
1075 | } | |
1076 | ||
44fd0261 | 1077 | #ifdef CONFIG_IPV6_PRIVACY |
072047e4 YH |
1078 | /* Rule 7: Prefer public address |
1079 | * Note: prefer temprary address if use_tempaddr >= 2 | |
1080 | */ | |
1081 | if (hiscore.rule < 7) { | |
1082 | if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ | |
1083 | (ifa_result->idev->cnf.use_tempaddr >= 2)) | |
1084 | hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1085 | hiscore.rule++; | |
1086 | } | |
1087 | if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ | |
1088 | (ifa->idev->cnf.use_tempaddr >= 2)) { | |
1089 | score.attrs |= IPV6_SADDR_SCORE_PRIVACY; | |
1090 | if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { | |
1091 | score.rule = 7; | |
1092 | goto record_it; | |
1093 | } | |
1094 | } else { | |
1095 | if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) | |
1096 | continue; | |
1097 | } | |
5e2707fa YH |
1098 | #else |
1099 | if (hiscore.rule < 7) | |
1100 | hiscore.rule++; | |
44fd0261 | 1101 | #endif |
072047e4 | 1102 | /* Rule 8: Use longest matching prefix */ |
12da2a43 | 1103 | if (hiscore.rule < 8) { |
072047e4 | 1104 | hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); |
12da2a43 YZ |
1105 | hiscore.rule++; |
1106 | } | |
072047e4 YH |
1107 | score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); |
1108 | if (score.matchlen > hiscore.matchlen) { | |
1109 | score.rule = 8; | |
1110 | goto record_it; | |
1da177e4 | 1111 | } |
072047e4 YH |
1112 | #if 0 |
1113 | else if (score.matchlen < hiscore.matchlen) | |
1114 | continue; | |
1115 | #endif | |
1116 | ||
1117 | /* Final Rule: choose first available one */ | |
1118 | continue; | |
1119 | record_it: | |
1120 | if (ifa_result) | |
1121 | in6_ifa_put(ifa_result); | |
1122 | in6_ifa_hold(ifa); | |
1123 | ifa_result = ifa; | |
1124 | hiscore = score; | |
1da177e4 | 1125 | } |
072047e4 | 1126 | read_unlock_bh(&idev->lock); |
1da177e4 | 1127 | } |
1da177e4 LT |
1128 | read_unlock(&addrconf_lock); |
1129 | read_unlock(&dev_base_lock); | |
1130 | ||
072047e4 YH |
1131 | if (!ifa_result) |
1132 | return -EADDRNOTAVAIL; | |
1133 | ||
1134 | ipv6_addr_copy(saddr, &ifa_result->addr); | |
1135 | in6_ifa_put(ifa_result); | |
1136 | return 0; | |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | ||
1140 | int ipv6_get_saddr(struct dst_entry *dst, | |
1141 | struct in6_addr *daddr, struct in6_addr *saddr) | |
1142 | { | |
1143 | return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr); | |
1144 | } | |
1145 | ||
1146 | ||
1147 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) | |
1148 | { | |
1149 | struct inet6_dev *idev; | |
1150 | int err = -EADDRNOTAVAIL; | |
1151 | ||
1152 | read_lock(&addrconf_lock); | |
1153 | if ((idev = __in6_dev_get(dev)) != NULL) { | |
1154 | struct inet6_ifaddr *ifp; | |
1155 | ||
1156 | read_lock_bh(&idev->lock); | |
1157 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1158 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1159 | ipv6_addr_copy(addr, &ifp->addr); | |
1160 | err = 0; | |
1161 | break; | |
1162 | } | |
1163 | } | |
1164 | read_unlock_bh(&idev->lock); | |
1165 | } | |
1166 | read_unlock(&addrconf_lock); | |
1167 | return err; | |
1168 | } | |
1169 | ||
1170 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1171 | { | |
1172 | int cnt = 0; | |
1173 | struct inet6_ifaddr *ifp; | |
1174 | ||
1175 | read_lock_bh(&idev->lock); | |
1176 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) | |
1177 | cnt++; | |
1178 | read_unlock_bh(&idev->lock); | |
1179 | return cnt; | |
1180 | } | |
1181 | ||
1182 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1183 | { | |
1184 | struct inet6_ifaddr * ifp; | |
1185 | u8 hash = ipv6_addr_hash(addr); | |
1186 | ||
1187 | read_lock_bh(&addrconf_hash_lock); | |
1188 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1189 | if (ipv6_addr_equal(&ifp->addr, addr) && | |
1190 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
1191 | if (dev == NULL || ifp->idev->dev == dev || | |
1192 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) | |
1193 | break; | |
1194 | } | |
1195 | } | |
1196 | read_unlock_bh(&addrconf_hash_lock); | |
1197 | return ifp != NULL; | |
1198 | } | |
1199 | ||
1200 | static | |
1201 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) | |
1202 | { | |
1203 | struct inet6_ifaddr * ifp; | |
1204 | u8 hash = ipv6_addr_hash(addr); | |
1205 | ||
1206 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1207 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1208 | if (dev == NULL || ifp->idev->dev == dev) | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | return ifp != NULL; | |
1213 | } | |
1214 | ||
1215 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) | |
1216 | { | |
1217 | struct inet6_ifaddr * ifp; | |
1218 | u8 hash = ipv6_addr_hash(addr); | |
1219 | ||
1220 | read_lock_bh(&addrconf_hash_lock); | |
1221 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { | |
1222 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
1223 | if (dev == NULL || ifp->idev->dev == dev || | |
1224 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
1225 | in6_ifa_hold(ifp); | |
1226 | break; | |
1227 | } | |
1228 | } | |
1229 | } | |
1230 | read_unlock_bh(&addrconf_hash_lock); | |
1231 | ||
1232 | return ifp; | |
1233 | } | |
1234 | ||
1235 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) | |
1236 | { | |
1237 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
0fa1a53e | 1238 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
1da177e4 | 1239 | u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
8feaf0c0 | 1240 | u32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
1da177e4 | 1241 | int sk_ipv6only = ipv6_only_sock(sk); |
463c84b9 | 1242 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
1da177e4 LT |
1243 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
1244 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
1245 | ||
1246 | if (!sk2_rcv_saddr && !sk_ipv6only) | |
1247 | return 1; | |
1248 | ||
1249 | if (addr_type2 == IPV6_ADDR_ANY && | |
1250 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
1251 | return 1; | |
1252 | ||
1253 | if (addr_type == IPV6_ADDR_ANY && | |
1254 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
1255 | return 1; | |
1256 | ||
1257 | if (sk2_rcv_saddr6 && | |
1258 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
1259 | return 1; | |
1260 | ||
1261 | if (addr_type == IPV6_ADDR_MAPPED && | |
1262 | !sk2_ipv6only && | |
1263 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) | |
1264 | return 1; | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | /* Gets referenced address, destroys ifaddr */ | |
1270 | ||
9f5336e2 | 1271 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
1da177e4 | 1272 | { |
1da177e4 LT |
1273 | if (ifp->flags&IFA_F_PERMANENT) { |
1274 | spin_lock_bh(&ifp->lock); | |
1275 | addrconf_del_timer(ifp); | |
1276 | ifp->flags |= IFA_F_TENTATIVE; | |
1277 | spin_unlock_bh(&ifp->lock); | |
1278 | in6_ifa_put(ifp); | |
1279 | #ifdef CONFIG_IPV6_PRIVACY | |
1280 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1281 | struct inet6_ifaddr *ifpub; | |
1282 | spin_lock_bh(&ifp->lock); | |
1283 | ifpub = ifp->ifpub; | |
1284 | if (ifpub) { | |
1285 | in6_ifa_hold(ifpub); | |
1286 | spin_unlock_bh(&ifp->lock); | |
1287 | ipv6_create_tempaddr(ifpub, ifp); | |
1288 | in6_ifa_put(ifpub); | |
1289 | } else { | |
1290 | spin_unlock_bh(&ifp->lock); | |
1291 | } | |
1292 | ipv6_del_addr(ifp); | |
1293 | #endif | |
1294 | } else | |
1295 | ipv6_del_addr(ifp); | |
1296 | } | |
1297 | ||
3c21edbd YH |
1298 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1299 | { | |
1300 | if (net_ratelimit()) | |
1301 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); | |
1302 | addrconf_dad_stop(ifp); | |
1303 | } | |
1da177e4 LT |
1304 | |
1305 | /* Join to solicited addr multicast group. */ | |
1306 | ||
1307 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) | |
1308 | { | |
1309 | struct in6_addr maddr; | |
1310 | ||
1311 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1312 | return; | |
1313 | ||
1314 | addrconf_addr_solict_mult(addr, &maddr); | |
1315 | ipv6_dev_mc_inc(dev, &maddr); | |
1316 | } | |
1317 | ||
1318 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) | |
1319 | { | |
1320 | struct in6_addr maddr; | |
1321 | ||
1322 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1323 | return; | |
1324 | ||
1325 | addrconf_addr_solict_mult(addr, &maddr); | |
1326 | __ipv6_dev_mc_dec(idev, &maddr); | |
1327 | } | |
1328 | ||
20380731 | 1329 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1330 | { |
1331 | struct in6_addr addr; | |
1332 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1333 | if (ipv6_addr_any(&addr)) | |
1334 | return; | |
1335 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1336 | } | |
1337 | ||
20380731 | 1338 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1339 | { |
1340 | struct in6_addr addr; | |
1341 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); | |
1342 | if (ipv6_addr_any(&addr)) | |
1343 | return; | |
1344 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1345 | } | |
1346 | ||
073a8e0e YH |
1347 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1348 | { | |
1349 | if (dev->addr_len != ETH_ALEN) | |
1350 | return -1; | |
1351 | memcpy(eui, dev->dev_addr, 3); | |
1352 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1353 | ||
1354 | /* | |
1355 | * The zSeries OSA network cards can be shared among various | |
1356 | * OS instances, but the OSA cards have only one MAC address. | |
1357 | * This leads to duplicate address conflicts in conjunction | |
1358 | * with IPv6 if more than one instance uses the same card. | |
1359 | * | |
1360 | * The driver for these cards can deliver a unique 16-bit | |
1361 | * identifier for each instance sharing the same card. It is | |
1362 | * placed instead of 0xFFFE in the interface identifier. The | |
1363 | * "u" bit of the interface identifier is not inverted in this | |
1364 | * case. Hence the resulting interface identifier has local | |
1365 | * scope according to RFC2373. | |
1366 | */ | |
1367 | if (dev->dev_id) { | |
1368 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1369 | eui[4] = dev->dev_id & 0xFF; | |
1370 | } else { | |
1371 | eui[3] = 0xFF; | |
1372 | eui[4] = 0xFE; | |
1373 | eui[0] ^= 2; | |
1374 | } | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) | |
1379 | { | |
1380 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1381 | if (dev->addr_len != ARCNET_ALEN) | |
1382 | return -1; | |
1383 | memset(eui, 0, 7); | |
1384 | eui[7] = *(u8*)dev->dev_addr; | |
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1389 | { | |
1390 | if (dev->addr_len != INFINIBAND_ALEN) | |
1391 | return -1; | |
1392 | memcpy(eui, dev->dev_addr + 12, 8); | |
1393 | eui[0] |= 2; | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1da177e4 LT |
1397 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1398 | { | |
1399 | switch (dev->type) { | |
1400 | case ARPHRD_ETHER: | |
1401 | case ARPHRD_FDDI: | |
1402 | case ARPHRD_IEEE802_TR: | |
073a8e0e | 1403 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1404 | case ARPHRD_ARCNET: |
073a8e0e | 1405 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1406 | case ARPHRD_INFINIBAND: |
073a8e0e | 1407 | return addrconf_ifid_infiniband(eui, dev); |
1da177e4 LT |
1408 | } |
1409 | return -1; | |
1410 | } | |
1411 | ||
1412 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1413 | { | |
1414 | int err = -1; | |
1415 | struct inet6_ifaddr *ifp; | |
1416 | ||
1417 | read_lock_bh(&idev->lock); | |
1418 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { | |
1419 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { | |
1420 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1421 | err = 0; | |
1422 | break; | |
1423 | } | |
1424 | } | |
1425 | read_unlock_bh(&idev->lock); | |
1426 | return err; | |
1427 | } | |
1428 | ||
1429 | #ifdef CONFIG_IPV6_PRIVACY | |
1430 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1431 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1432 | { | |
1da177e4 | 1433 | regen: |
955189ef | 1434 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1435 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1436 | |
1437 | /* | |
1438 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1439 | * check if generated address is not inappropriate | |
1440 | * | |
1441 | * - Reserved subnet anycast (RFC 2526) | |
1442 | * 11111101 11....11 1xxxxxxx | |
1443 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 | |
1444 | * 00-00-5E-FE-xx-xx-xx-xx | |
1445 | * - value 0 | |
1446 | * - XXX: already assigned to an address on the device | |
1447 | */ | |
1448 | if (idev->rndid[0] == 0xfd && | |
1449 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && | |
1450 | (idev->rndid[7]&0x80)) | |
1451 | goto regen; | |
1452 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1453 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1454 | goto regen; | |
1455 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1456 | goto regen; | |
1457 | } | |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | static void ipv6_regen_rndid(unsigned long data) | |
1463 | { | |
1464 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1465 | unsigned long expires; | |
1466 | ||
1467 | read_lock_bh(&addrconf_lock); | |
1468 | write_lock_bh(&idev->lock); | |
1469 | ||
1470 | if (idev->dead) | |
1471 | goto out; | |
1472 | ||
1473 | if (__ipv6_regen_rndid(idev) < 0) | |
1474 | goto out; | |
1475 | ||
1476 | expires = jiffies + | |
1477 | idev->cnf.temp_prefered_lft * HZ - | |
1478 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; | |
1479 | if (time_before(expires, jiffies)) { | |
1480 | printk(KERN_WARNING | |
1481 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", | |
1482 | idev->dev->name); | |
1483 | goto out; | |
1484 | } | |
1485 | ||
1486 | if (!mod_timer(&idev->regen_timer, expires)) | |
1487 | in6_dev_hold(idev); | |
1488 | ||
1489 | out: | |
1490 | write_unlock_bh(&idev->lock); | |
1491 | read_unlock_bh(&addrconf_lock); | |
1492 | in6_dev_put(idev); | |
1493 | } | |
1494 | ||
1495 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { | |
1496 | int ret = 0; | |
1497 | ||
1498 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1499 | ret = __ipv6_regen_rndid(idev); | |
1500 | return ret; | |
1501 | } | |
1502 | #endif | |
1503 | ||
1504 | /* | |
1505 | * Add prefix route. | |
1506 | */ | |
1507 | ||
1508 | static void | |
1509 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1510 | unsigned long expires, u32 flags) |
1da177e4 LT |
1511 | { |
1512 | struct in6_rtmsg rtmsg; | |
1513 | ||
1514 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1515 | ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx); | |
1516 | rtmsg.rtmsg_dst_len = plen; | |
1517 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1518 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1519 | rtmsg.rtmsg_info = expires; | |
1520 | rtmsg.rtmsg_flags = RTF_UP|flags; | |
1521 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1522 | ||
1523 | /* Prevent useless cloning on PtP SIT. | |
1524 | This thing is done here expecting that the whole | |
1525 | class of non-broadcast devices need not cloning. | |
1526 | */ | |
1527 | if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT)) | |
1528 | rtmsg.rtmsg_flags |= RTF_NONEXTHOP; | |
1529 | ||
c71099ac | 1530 | ip6_route_add(&rtmsg, NULL, NULL, NULL, RT6_TABLE_PREFIX); |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | /* Create "default" multicast route to the interface */ | |
1534 | ||
1535 | static void addrconf_add_mroute(struct net_device *dev) | |
1536 | { | |
1537 | struct in6_rtmsg rtmsg; | |
1538 | ||
1539 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1540 | ipv6_addr_set(&rtmsg.rtmsg_dst, | |
1541 | htonl(0xFF000000), 0, 0, 0); | |
1542 | rtmsg.rtmsg_dst_len = 8; | |
1543 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1544 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1545 | rtmsg.rtmsg_flags = RTF_UP; | |
1546 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
c71099ac | 1547 | ip6_route_add(&rtmsg, NULL, NULL, NULL, RT6_TABLE_LOCAL); |
1da177e4 LT |
1548 | } |
1549 | ||
1550 | static void sit_route_add(struct net_device *dev) | |
1551 | { | |
1552 | struct in6_rtmsg rtmsg; | |
1553 | ||
1554 | memset(&rtmsg, 0, sizeof(rtmsg)); | |
1555 | ||
1556 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; | |
1557 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; | |
1558 | ||
1559 | /* prefix length - 96 bits "::d.d.d.d" */ | |
1560 | rtmsg.rtmsg_dst_len = 96; | |
1561 | rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP; | |
1562 | rtmsg.rtmsg_ifindex = dev->ifindex; | |
1563 | ||
c71099ac | 1564 | ip6_route_add(&rtmsg, NULL, NULL, NULL, RT6_TABLE_MAIN); |
1da177e4 LT |
1565 | } |
1566 | ||
1567 | static void addrconf_add_lroute(struct net_device *dev) | |
1568 | { | |
1569 | struct in6_addr addr; | |
1570 | ||
1571 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1572 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1573 | } | |
1574 | ||
1575 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1576 | { | |
1577 | struct inet6_dev *idev; | |
1578 | ||
1579 | ASSERT_RTNL(); | |
1580 | ||
1581 | if ((idev = ipv6_find_idev(dev)) == NULL) | |
1582 | return NULL; | |
1583 | ||
1584 | /* Add default multicast route */ | |
1585 | addrconf_add_mroute(dev); | |
1586 | ||
1587 | /* Add link local route */ | |
1588 | addrconf_add_lroute(dev); | |
1589 | return idev; | |
1590 | } | |
1591 | ||
1592 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) | |
1593 | { | |
1594 | struct prefix_info *pinfo; | |
1595 | __u32 valid_lft; | |
1596 | __u32 prefered_lft; | |
1597 | int addr_type; | |
1598 | unsigned long rt_expires; | |
1599 | struct inet6_dev *in6_dev; | |
1600 | ||
1601 | pinfo = (struct prefix_info *) opt; | |
1602 | ||
1603 | if (len < sizeof(struct prefix_info)) { | |
1604 | ADBG(("addrconf: prefix option too short\n")); | |
1605 | return; | |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * Validation checks ([ADDRCONF], page 19) | |
1610 | */ | |
1611 | ||
1612 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1613 | ||
1614 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1615 | return; | |
1616 | ||
1617 | valid_lft = ntohl(pinfo->valid); | |
1618 | prefered_lft = ntohl(pinfo->prefered); | |
1619 | ||
1620 | if (prefered_lft > valid_lft) { | |
1621 | if (net_ratelimit()) | |
1622 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); | |
1623 | return; | |
1624 | } | |
1625 | ||
1626 | in6_dev = in6_dev_get(dev); | |
1627 | ||
1628 | if (in6_dev == NULL) { | |
1629 | if (net_ratelimit()) | |
1630 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); | |
1631 | return; | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Two things going on here: | |
1636 | * 1) Add routes for on-link prefixes | |
1637 | * 2) Configure prefixes with the auto flag set | |
1638 | */ | |
1639 | ||
1640 | /* Avoid arithmetic overflow. Really, we could | |
1641 | save rt_expires in seconds, likely valid_lft, | |
1642 | but it would require division in fib gc, that it | |
1643 | not good. | |
1644 | */ | |
1645 | if (valid_lft >= 0x7FFFFFFF/HZ) | |
3dd4bc68 | 1646 | rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); |
1da177e4 | 1647 | else |
3dd4bc68 YH |
1648 | rt_expires = valid_lft * HZ; |
1649 | ||
1650 | /* | |
1651 | * We convert this (in jiffies) to clock_t later. | |
1652 | * Avoid arithmetic overflow there as well. | |
1653 | * Overflow can happen only if HZ < USER_HZ. | |
1654 | */ | |
1655 | if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) | |
1656 | rt_expires = 0x7FFFFFFF / USER_HZ; | |
1da177e4 LT |
1657 | |
1658 | if (pinfo->onlink) { | |
1659 | struct rt6_info *rt; | |
1660 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); | |
1661 | ||
1662 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { | |
1663 | if (rt->rt6i_flags&RTF_EXPIRES) { | |
1664 | if (valid_lft == 0) { | |
e0a1ad73 | 1665 | ip6_del_rt(rt); |
1da177e4 LT |
1666 | rt = NULL; |
1667 | } else { | |
3dd4bc68 | 1668 | rt->rt6i_expires = jiffies + rt_expires; |
1da177e4 LT |
1669 | } |
1670 | } | |
1671 | } else if (valid_lft) { | |
1672 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, | |
3dd4bc68 | 1673 | dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
1da177e4 LT |
1674 | } |
1675 | if (rt) | |
1676 | dst_release(&rt->u.dst); | |
1677 | } | |
1678 | ||
1679 | /* Try to figure out our local address for this prefix */ | |
1680 | ||
1681 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1682 | struct inet6_ifaddr * ifp; | |
1683 | struct in6_addr addr; | |
1684 | int create = 0, update_lft = 0; | |
1685 | ||
1686 | if (pinfo->prefix_len == 64) { | |
1687 | memcpy(&addr, &pinfo->prefix, 8); | |
1688 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1689 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1690 | in6_dev_put(in6_dev); | |
1691 | return; | |
1692 | } | |
1693 | goto ok; | |
1694 | } | |
1695 | if (net_ratelimit()) | |
1696 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", | |
1697 | pinfo->prefix_len); | |
1698 | in6_dev_put(in6_dev); | |
1699 | return; | |
1700 | ||
1701 | ok: | |
1702 | ||
1703 | ifp = ipv6_get_ifaddr(&addr, dev, 1); | |
1704 | ||
1705 | if (ifp == NULL && valid_lft) { | |
1706 | int max_addresses = in6_dev->cnf.max_addresses; | |
1707 | ||
1708 | /* Do not allow to create too much of autoconfigured | |
1709 | * addresses; this would be too easy way to crash kernel. | |
1710 | */ | |
1711 | if (!max_addresses || | |
1712 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1713 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
1714 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); | |
1715 | ||
1716 | if (!ifp || IS_ERR(ifp)) { | |
1717 | in6_dev_put(in6_dev); | |
1718 | return; | |
1719 | } | |
1720 | ||
1721 | update_lft = create = 1; | |
1722 | ifp->cstamp = jiffies; | |
1723 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); | |
1724 | } | |
1725 | ||
1726 | if (ifp) { | |
1727 | int flags; | |
1728 | unsigned long now; | |
1729 | #ifdef CONFIG_IPV6_PRIVACY | |
1730 | struct inet6_ifaddr *ift; | |
1731 | #endif | |
1732 | u32 stored_lft; | |
1733 | ||
1734 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1735 | spin_lock(&ifp->lock); | |
1736 | now = jiffies; | |
1737 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1738 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1739 | else | |
1740 | stored_lft = 0; | |
1741 | if (!update_lft && stored_lft) { | |
1742 | if (valid_lft > MIN_VALID_LIFETIME || | |
1743 | valid_lft > stored_lft) | |
1744 | update_lft = 1; | |
1745 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1746 | /* valid_lft <= stored_lft is always true */ | |
1747 | /* XXX: IPsec */ | |
1748 | update_lft = 0; | |
1749 | } else { | |
1750 | valid_lft = MIN_VALID_LIFETIME; | |
1751 | if (valid_lft < prefered_lft) | |
1752 | prefered_lft = valid_lft; | |
1753 | update_lft = 1; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | if (update_lft) { | |
1758 | ifp->valid_lft = valid_lft; | |
1759 | ifp->prefered_lft = prefered_lft; | |
1760 | ifp->tstamp = now; | |
1761 | flags = ifp->flags; | |
1762 | ifp->flags &= ~IFA_F_DEPRECATED; | |
1763 | spin_unlock(&ifp->lock); | |
1764 | ||
1765 | if (!(flags&IFA_F_TENTATIVE)) | |
1766 | ipv6_ifa_notify(0, ifp); | |
1767 | } else | |
1768 | spin_unlock(&ifp->lock); | |
1769 | ||
1770 | #ifdef CONFIG_IPV6_PRIVACY | |
1771 | read_lock_bh(&in6_dev->lock); | |
1772 | /* update all temporary addresses in the list */ | |
1773 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { | |
1774 | /* | |
1775 | * When adjusting the lifetimes of an existing | |
1776 | * temporary address, only lower the lifetimes. | |
1777 | * Implementations must not increase the | |
1778 | * lifetimes of an existing temporary address | |
1779 | * when processing a Prefix Information Option. | |
1780 | */ | |
1781 | spin_lock(&ift->lock); | |
1782 | flags = ift->flags; | |
1783 | if (ift->valid_lft > valid_lft && | |
1784 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) | |
1785 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; | |
1786 | if (ift->prefered_lft > prefered_lft && | |
1787 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) | |
1788 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; | |
1789 | spin_unlock(&ift->lock); | |
1790 | if (!(flags&IFA_F_TENTATIVE)) | |
1791 | ipv6_ifa_notify(0, ift); | |
1792 | } | |
1793 | ||
1794 | if (create && in6_dev->cnf.use_tempaddr > 0) { | |
1795 | /* | |
1796 | * When a new public address is created as described in [ADDRCONF], | |
1797 | * also create a new temporary address. | |
1798 | */ | |
1799 | read_unlock_bh(&in6_dev->lock); | |
1800 | ipv6_create_tempaddr(ifp, NULL); | |
1801 | } else { | |
1802 | read_unlock_bh(&in6_dev->lock); | |
1803 | } | |
1804 | #endif | |
1805 | in6_ifa_put(ifp); | |
1806 | addrconf_verify(0); | |
1807 | } | |
1808 | } | |
1809 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
1810 | in6_dev_put(in6_dev); | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * Set destination address. | |
1815 | * Special case for SIT interfaces where we create a new "virtual" | |
1816 | * device. | |
1817 | */ | |
1818 | int addrconf_set_dstaddr(void __user *arg) | |
1819 | { | |
1820 | struct in6_ifreq ireq; | |
1821 | struct net_device *dev; | |
1822 | int err = -EINVAL; | |
1823 | ||
1824 | rtnl_lock(); | |
1825 | ||
1826 | err = -EFAULT; | |
1827 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1828 | goto err_exit; | |
1829 | ||
1830 | dev = __dev_get_by_index(ireq.ifr6_ifindex); | |
1831 | ||
1832 | err = -ENODEV; | |
1833 | if (dev == NULL) | |
1834 | goto err_exit; | |
1835 | ||
1836 | if (dev->type == ARPHRD_SIT) { | |
1837 | struct ifreq ifr; | |
1838 | mm_segment_t oldfs; | |
1839 | struct ip_tunnel_parm p; | |
1840 | ||
1841 | err = -EADDRNOTAVAIL; | |
1842 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
1843 | goto err_exit; | |
1844 | ||
1845 | memset(&p, 0, sizeof(p)); | |
1846 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
1847 | p.iph.saddr = 0; | |
1848 | p.iph.version = 4; | |
1849 | p.iph.ihl = 5; | |
1850 | p.iph.protocol = IPPROTO_IPV6; | |
1851 | p.iph.ttl = 64; | |
1852 | ifr.ifr_ifru.ifru_data = (void __user *)&p; | |
1853 | ||
1854 | oldfs = get_fs(); set_fs(KERNEL_DS); | |
1855 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
1856 | set_fs(oldfs); | |
1857 | ||
1858 | if (err == 0) { | |
1859 | err = -ENOBUFS; | |
1860 | if ((dev = __dev_get_by_name(p.name)) == NULL) | |
1861 | goto err_exit; | |
1862 | err = dev_open(dev); | |
1863 | } | |
1864 | } | |
1865 | ||
1866 | err_exit: | |
1867 | rtnl_unlock(); | |
1868 | return err; | |
1869 | } | |
1870 | ||
1871 | /* | |
1872 | * Manual configuration of address on an interface | |
1873 | */ | |
0778769d NT |
1874 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, |
1875 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
1876 | { |
1877 | struct inet6_ifaddr *ifp; | |
1878 | struct inet6_dev *idev; | |
1879 | struct net_device *dev; | |
0778769d | 1880 | __u8 ifa_flags = 0; |
1da177e4 LT |
1881 | int scope; |
1882 | ||
1883 | ASSERT_RTNL(); | |
1884 | ||
0778769d NT |
1885 | /* check the lifetime */ |
1886 | if (!valid_lft || prefered_lft > valid_lft) | |
1887 | return -EINVAL; | |
1888 | ||
1da177e4 LT |
1889 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
1890 | return -ENODEV; | |
1891 | ||
1892 | if (!(dev->flags&IFF_UP)) | |
1893 | return -ENETDOWN; | |
1894 | ||
1895 | if ((idev = addrconf_add_dev(dev)) == NULL) | |
1896 | return -ENOBUFS; | |
1897 | ||
1898 | scope = ipv6_addr_scope(pfx); | |
1899 | ||
0778769d NT |
1900 | if (valid_lft == INFINITY_LIFE_TIME) |
1901 | ifa_flags |= IFA_F_PERMANENT; | |
1902 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
1903 | valid_lft = 0x7FFFFFFF/HZ; | |
1904 | ||
1905 | if (prefered_lft == 0) | |
1906 | ifa_flags |= IFA_F_DEPRECATED; | |
1907 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
1908 | (prefered_lft != INFINITY_LIFE_TIME)) | |
1909 | prefered_lft = 0x7FFFFFFF/HZ; | |
1910 | ||
1911 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
1912 | ||
1da177e4 | 1913 | if (!IS_ERR(ifp)) { |
06aebfb7 | 1914 | spin_lock_bh(&ifp->lock); |
0778769d NT |
1915 | ifp->valid_lft = valid_lft; |
1916 | ifp->prefered_lft = prefered_lft; | |
1917 | ifp->tstamp = jiffies; | |
06aebfb7 | 1918 | spin_unlock_bh(&ifp->lock); |
0778769d | 1919 | |
1da177e4 LT |
1920 | addrconf_dad_start(ifp, 0); |
1921 | in6_ifa_put(ifp); | |
0778769d | 1922 | addrconf_verify(0); |
1da177e4 LT |
1923 | return 0; |
1924 | } | |
1925 | ||
1926 | return PTR_ERR(ifp); | |
1927 | } | |
1928 | ||
1929 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) | |
1930 | { | |
1931 | struct inet6_ifaddr *ifp; | |
1932 | struct inet6_dev *idev; | |
1933 | struct net_device *dev; | |
1934 | ||
1935 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
1936 | return -ENODEV; | |
1937 | ||
1938 | if ((idev = __in6_dev_get(dev)) == NULL) | |
1939 | return -ENXIO; | |
1940 | ||
1941 | read_lock_bh(&idev->lock); | |
1942 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { | |
1943 | if (ifp->prefix_len == plen && | |
1944 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
1945 | in6_ifa_hold(ifp); | |
1946 | read_unlock_bh(&idev->lock); | |
1947 | ||
1948 | ipv6_del_addr(ifp); | |
1949 | ||
1950 | /* If the last address is deleted administratively, | |
1951 | disable IPv6 on this interface. | |
1952 | */ | |
1953 | if (idev->addr_list == NULL) | |
1954 | addrconf_ifdown(idev->dev, 1); | |
1955 | return 0; | |
1956 | } | |
1957 | } | |
1958 | read_unlock_bh(&idev->lock); | |
1959 | return -EADDRNOTAVAIL; | |
1960 | } | |
1961 | ||
1962 | ||
1963 | int addrconf_add_ifaddr(void __user *arg) | |
1964 | { | |
1965 | struct in6_ifreq ireq; | |
1966 | int err; | |
1967 | ||
1968 | if (!capable(CAP_NET_ADMIN)) | |
1969 | return -EPERM; | |
1970 | ||
1971 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1972 | return -EFAULT; | |
1973 | ||
1974 | rtnl_lock(); | |
0778769d NT |
1975 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, |
1976 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
1977 | rtnl_unlock(); |
1978 | return err; | |
1979 | } | |
1980 | ||
1981 | int addrconf_del_ifaddr(void __user *arg) | |
1982 | { | |
1983 | struct in6_ifreq ireq; | |
1984 | int err; | |
1985 | ||
1986 | if (!capable(CAP_NET_ADMIN)) | |
1987 | return -EPERM; | |
1988 | ||
1989 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
1990 | return -EFAULT; | |
1991 | ||
1992 | rtnl_lock(); | |
1993 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); | |
1994 | rtnl_unlock(); | |
1995 | return err; | |
1996 | } | |
1997 | ||
1998 | static void sit_add_v4_addrs(struct inet6_dev *idev) | |
1999 | { | |
2000 | struct inet6_ifaddr * ifp; | |
2001 | struct in6_addr addr; | |
2002 | struct net_device *dev; | |
2003 | int scope; | |
2004 | ||
2005 | ASSERT_RTNL(); | |
2006 | ||
2007 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2008 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2009 | ||
2010 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2011 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2012 | scope = IFA_LINK; | |
2013 | } else { | |
2014 | scope = IPV6_ADDR_COMPATv4; | |
2015 | } | |
2016 | ||
2017 | if (addr.s6_addr32[3]) { | |
2018 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); | |
2019 | if (!IS_ERR(ifp)) { | |
2020 | spin_lock_bh(&ifp->lock); | |
2021 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2022 | spin_unlock_bh(&ifp->lock); | |
2023 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2024 | in6_ifa_put(ifp); | |
2025 | } | |
2026 | return; | |
2027 | } | |
2028 | ||
2029 | for (dev = dev_base; dev != NULL; dev = dev->next) { | |
e5ed6399 | 2030 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
2031 | if (in_dev && (dev->flags & IFF_UP)) { |
2032 | struct in_ifaddr * ifa; | |
2033 | ||
2034 | int flag = scope; | |
2035 | ||
2036 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2037 | int plen; | |
2038 | ||
2039 | addr.s6_addr32[3] = ifa->ifa_local; | |
2040 | ||
2041 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2042 | continue; | |
2043 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2044 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2045 | continue; | |
2046 | flag |= IFA_HOST; | |
2047 | } | |
2048 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2049 | plen = 64; | |
2050 | else | |
2051 | plen = 96; | |
2052 | ||
2053 | ifp = ipv6_add_addr(idev, &addr, plen, flag, | |
2054 | IFA_F_PERMANENT); | |
2055 | if (!IS_ERR(ifp)) { | |
2056 | spin_lock_bh(&ifp->lock); | |
2057 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2058 | spin_unlock_bh(&ifp->lock); | |
2059 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2060 | in6_ifa_put(ifp); | |
2061 | } | |
2062 | } | |
2063 | } | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | static void init_loopback(struct net_device *dev) | |
2068 | { | |
2069 | struct inet6_dev *idev; | |
2070 | struct inet6_ifaddr * ifp; | |
2071 | ||
2072 | /* ::1 */ | |
2073 | ||
2074 | ASSERT_RTNL(); | |
2075 | ||
2076 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2077 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); | |
2078 | return; | |
2079 | } | |
2080 | ||
2081 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); | |
2082 | if (!IS_ERR(ifp)) { | |
2083 | spin_lock_bh(&ifp->lock); | |
2084 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2085 | spin_unlock_bh(&ifp->lock); | |
2086 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2087 | in6_ifa_put(ifp); | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) | |
2092 | { | |
2093 | struct inet6_ifaddr * ifp; | |
2094 | ||
2095 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); | |
2096 | if (!IS_ERR(ifp)) { | |
2097 | addrconf_dad_start(ifp, 0); | |
2098 | in6_ifa_put(ifp); | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | static void addrconf_dev_config(struct net_device *dev) | |
2103 | { | |
2104 | struct in6_addr addr; | |
2105 | struct inet6_dev * idev; | |
2106 | ||
2107 | ASSERT_RTNL(); | |
2108 | ||
2109 | if ((dev->type != ARPHRD_ETHER) && | |
2110 | (dev->type != ARPHRD_FDDI) && | |
2111 | (dev->type != ARPHRD_IEEE802_TR) && | |
2112 | (dev->type != ARPHRD_ARCNET) && | |
2113 | (dev->type != ARPHRD_INFINIBAND)) { | |
2114 | /* Alas, we support only Ethernet autoconfiguration. */ | |
2115 | return; | |
2116 | } | |
2117 | ||
2118 | idev = addrconf_add_dev(dev); | |
2119 | if (idev == NULL) | |
2120 | return; | |
2121 | ||
2122 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2123 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2124 | ||
2125 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2126 | addrconf_add_linklocal(idev, &addr); | |
2127 | } | |
2128 | ||
2129 | static void addrconf_sit_config(struct net_device *dev) | |
2130 | { | |
2131 | struct inet6_dev *idev; | |
2132 | ||
2133 | ASSERT_RTNL(); | |
2134 | ||
2135 | /* | |
2136 | * Configure the tunnel with one of our IPv4 | |
2137 | * addresses... we should configure all of | |
2138 | * our v4 addrs in the tunnel | |
2139 | */ | |
2140 | ||
2141 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
2142 | printk(KERN_DEBUG "init sit: add_dev failed\n"); | |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | sit_add_v4_addrs(idev); | |
2147 | ||
2148 | if (dev->flags&IFF_POINTOPOINT) { | |
2149 | addrconf_add_mroute(dev); | |
2150 | addrconf_add_lroute(dev); | |
2151 | } else | |
2152 | sit_route_add(dev); | |
2153 | } | |
2154 | ||
2155 | static inline int | |
2156 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2157 | { | |
2158 | struct in6_addr lladdr; | |
2159 | ||
2160 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { | |
2161 | addrconf_add_linklocal(idev, &lladdr); | |
2162 | return 0; | |
2163 | } | |
2164 | return -1; | |
2165 | } | |
2166 | ||
2167 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2168 | { | |
2169 | struct net_device *link_dev; | |
2170 | ||
2171 | /* first try to inherit the link-local address from the link device */ | |
2172 | if (idev->dev->iflink && | |
2173 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { | |
2174 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2175 | return; | |
2176 | } | |
2177 | /* then try to inherit it from any device */ | |
2178 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { | |
2179 | if (!ipv6_inherit_linklocal(idev, link_dev)) | |
2180 | return; | |
2181 | } | |
2182 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); | |
2183 | } | |
2184 | ||
2185 | /* | |
2186 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2187 | * DHCPv6, MLD etc. can be run over the virtual link | |
2188 | */ | |
2189 | ||
2190 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2191 | { | |
2192 | struct inet6_dev *idev; | |
2193 | ||
2194 | ASSERT_RTNL(); | |
2195 | ||
2196 | if ((idev = addrconf_add_dev(dev)) == NULL) { | |
2197 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); | |
2198 | return; | |
2199 | } | |
2200 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2201 | } |
2202 | ||
2203 | static int addrconf_notify(struct notifier_block *this, unsigned long event, | |
2204 | void * data) | |
2205 | { | |
2206 | struct net_device *dev = (struct net_device *) data; | |
2207 | struct inet6_dev *idev = __in6_dev_get(dev); | |
c5e33bdd | 2208 | int run_pending = 0; |
1da177e4 LT |
2209 | |
2210 | switch(event) { | |
2211 | case NETDEV_UP: | |
3c21edbd YH |
2212 | case NETDEV_CHANGE: |
2213 | if (event == NETDEV_UP) { | |
2214 | if (!netif_carrier_ok(dev)) { | |
2215 | /* device is not ready yet. */ | |
2216 | printk(KERN_INFO | |
2217 | "ADDRCONF(NETDEV_UP): %s: " | |
2218 | "link is not ready\n", | |
2219 | dev->name); | |
2220 | break; | |
2221 | } | |
99081049 KS |
2222 | |
2223 | if (idev) | |
2224 | idev->if_flags |= IF_READY; | |
3c21edbd YH |
2225 | } else { |
2226 | if (!netif_carrier_ok(dev)) { | |
2227 | /* device is still not ready. */ | |
2228 | break; | |
2229 | } | |
2230 | ||
2231 | if (idev) { | |
2232 | if (idev->if_flags & IF_READY) { | |
2233 | /* device is already configured. */ | |
2234 | break; | |
2235 | } | |
2236 | idev->if_flags |= IF_READY; | |
2237 | } | |
2238 | ||
2239 | printk(KERN_INFO | |
2240 | "ADDRCONF(NETDEV_CHANGE): %s: " | |
2241 | "link becomes ready\n", | |
2242 | dev->name); | |
2243 | ||
c5e33bdd | 2244 | run_pending = 1; |
3c21edbd YH |
2245 | } |
2246 | ||
1da177e4 LT |
2247 | switch(dev->type) { |
2248 | case ARPHRD_SIT: | |
2249 | addrconf_sit_config(dev); | |
2250 | break; | |
2251 | case ARPHRD_TUNNEL6: | |
2252 | addrconf_ip6_tnl_config(dev); | |
2253 | break; | |
2254 | case ARPHRD_LOOPBACK: | |
2255 | init_loopback(dev); | |
2256 | break; | |
2257 | ||
2258 | default: | |
2259 | addrconf_dev_config(dev); | |
2260 | break; | |
2261 | }; | |
2262 | if (idev) { | |
c5e33bdd YH |
2263 | if (run_pending) |
2264 | addrconf_dad_run(idev); | |
2265 | ||
1da177e4 LT |
2266 | /* If the MTU changed during the interface down, when the |
2267 | interface up, the changed MTU must be reflected in the | |
2268 | idev as well as routers. | |
2269 | */ | |
2270 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { | |
2271 | rt6_mtu_change(dev, dev->mtu); | |
2272 | idev->cnf.mtu6 = dev->mtu; | |
2273 | } | |
2274 | idev->tstamp = jiffies; | |
2275 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
2276 | /* If the changed mtu during down is lower than IPV6_MIN_MTU | |
2277 | stop IPv6 on this interface. | |
2278 | */ | |
2279 | if (dev->mtu < IPV6_MIN_MTU) | |
2280 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2281 | } | |
2282 | break; | |
2283 | ||
2284 | case NETDEV_CHANGEMTU: | |
2285 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { | |
2286 | rt6_mtu_change(dev, dev->mtu); | |
2287 | idev->cnf.mtu6 = dev->mtu; | |
2288 | break; | |
2289 | } | |
2290 | ||
2291 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ | |
2292 | ||
2293 | case NETDEV_DOWN: | |
2294 | case NETDEV_UNREGISTER: | |
2295 | /* | |
2296 | * Remove all addresses from this interface. | |
2297 | */ | |
2298 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2299 | break; | |
3c21edbd | 2300 | |
1da177e4 LT |
2301 | case NETDEV_CHANGENAME: |
2302 | #ifdef CONFIG_SYSCTL | |
2303 | if (idev) { | |
2304 | addrconf_sysctl_unregister(&idev->cnf); | |
2305 | neigh_sysctl_unregister(idev->nd_parms); | |
2306 | neigh_sysctl_register(dev, idev->nd_parms, | |
2307 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", | |
2308 | &ndisc_ifinfo_sysctl_change, | |
2309 | NULL); | |
2310 | addrconf_sysctl_register(idev, &idev->cnf); | |
2311 | } | |
2312 | #endif | |
2313 | break; | |
2314 | }; | |
2315 | ||
2316 | return NOTIFY_OK; | |
2317 | } | |
2318 | ||
2319 | /* | |
2320 | * addrconf module should be notified of a device going up | |
2321 | */ | |
2322 | static struct notifier_block ipv6_dev_notf = { | |
2323 | .notifier_call = addrconf_notify, | |
2324 | .priority = 0 | |
2325 | }; | |
2326 | ||
2327 | static int addrconf_ifdown(struct net_device *dev, int how) | |
2328 | { | |
2329 | struct inet6_dev *idev; | |
2330 | struct inet6_ifaddr *ifa, **bifa; | |
2331 | int i; | |
2332 | ||
2333 | ASSERT_RTNL(); | |
2334 | ||
2335 | if (dev == &loopback_dev && how == 1) | |
2336 | how = 0; | |
2337 | ||
2338 | rt6_ifdown(dev); | |
2339 | neigh_ifdown(&nd_tbl, dev); | |
2340 | ||
2341 | idev = __in6_dev_get(dev); | |
2342 | if (idev == NULL) | |
2343 | return -ENODEV; | |
2344 | ||
2345 | /* Step 1: remove reference to ipv6 device from parent device. | |
2346 | Do not dev_put! | |
2347 | */ | |
2348 | if (how == 1) { | |
2349 | write_lock_bh(&addrconf_lock); | |
2350 | dev->ip6_ptr = NULL; | |
2351 | idev->dead = 1; | |
2352 | write_unlock_bh(&addrconf_lock); | |
2353 | ||
2354 | /* Step 1.5: remove snmp6 entry */ | |
2355 | snmp6_unregister_dev(idev); | |
2356 | ||
2357 | } | |
2358 | ||
2359 | /* Step 2: clear hash table */ | |
2360 | for (i=0; i<IN6_ADDR_HSIZE; i++) { | |
2361 | bifa = &inet6_addr_lst[i]; | |
2362 | ||
2363 | write_lock_bh(&addrconf_hash_lock); | |
2364 | while ((ifa = *bifa) != NULL) { | |
2365 | if (ifa->idev == idev) { | |
2366 | *bifa = ifa->lst_next; | |
2367 | ifa->lst_next = NULL; | |
2368 | addrconf_del_timer(ifa); | |
2369 | in6_ifa_put(ifa); | |
2370 | continue; | |
2371 | } | |
2372 | bifa = &ifa->lst_next; | |
2373 | } | |
2374 | write_unlock_bh(&addrconf_hash_lock); | |
2375 | } | |
2376 | ||
2377 | write_lock_bh(&idev->lock); | |
2378 | ||
2379 | /* Step 3: clear flags for stateless addrconf */ | |
2380 | if (how != 1) | |
3c21edbd | 2381 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 LT |
2382 | |
2383 | /* Step 4: clear address list */ | |
2384 | #ifdef CONFIG_IPV6_PRIVACY | |
2385 | if (how == 1 && del_timer(&idev->regen_timer)) | |
2386 | in6_dev_put(idev); | |
2387 | ||
2388 | /* clear tempaddr list */ | |
2389 | while ((ifa = idev->tempaddr_list) != NULL) { | |
2390 | idev->tempaddr_list = ifa->tmp_next; | |
2391 | ifa->tmp_next = NULL; | |
2392 | ifa->dead = 1; | |
2393 | write_unlock_bh(&idev->lock); | |
2394 | spin_lock_bh(&ifa->lock); | |
2395 | ||
2396 | if (ifa->ifpub) { | |
2397 | in6_ifa_put(ifa->ifpub); | |
2398 | ifa->ifpub = NULL; | |
2399 | } | |
2400 | spin_unlock_bh(&ifa->lock); | |
2401 | in6_ifa_put(ifa); | |
2402 | write_lock_bh(&idev->lock); | |
2403 | } | |
2404 | #endif | |
2405 | while ((ifa = idev->addr_list) != NULL) { | |
2406 | idev->addr_list = ifa->if_next; | |
2407 | ifa->if_next = NULL; | |
2408 | ifa->dead = 1; | |
2409 | addrconf_del_timer(ifa); | |
2410 | write_unlock_bh(&idev->lock); | |
2411 | ||
2412 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2413 | in6_ifa_put(ifa); | |
2414 | ||
2415 | write_lock_bh(&idev->lock); | |
2416 | } | |
2417 | write_unlock_bh(&idev->lock); | |
2418 | ||
2419 | /* Step 5: Discard multicast list */ | |
2420 | ||
2421 | if (how == 1) | |
2422 | ipv6_mc_destroy_dev(idev); | |
2423 | else | |
2424 | ipv6_mc_down(idev); | |
2425 | ||
2426 | /* Step 5: netlink notification of this interface */ | |
2427 | idev->tstamp = jiffies; | |
979ad663 | 2428 | inet6_ifinfo_notify(RTM_DELLINK, idev); |
1da177e4 LT |
2429 | |
2430 | /* Shot the device (if unregistered) */ | |
2431 | ||
2432 | if (how == 1) { | |
2433 | #ifdef CONFIG_SYSCTL | |
2434 | addrconf_sysctl_unregister(&idev->cnf); | |
2435 | neigh_sysctl_unregister(idev->nd_parms); | |
2436 | #endif | |
2437 | neigh_parms_release(&nd_tbl, idev->nd_parms); | |
2438 | neigh_ifdown(&nd_tbl, dev); | |
2439 | in6_dev_put(idev); | |
2440 | } | |
2441 | return 0; | |
2442 | } | |
2443 | ||
2444 | static void addrconf_rs_timer(unsigned long data) | |
2445 | { | |
2446 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2447 | ||
2448 | if (ifp->idev->cnf.forwarding) | |
2449 | goto out; | |
2450 | ||
2451 | if (ifp->idev->if_flags & IF_RA_RCVD) { | |
2452 | /* | |
2453 | * Announcement received after solicitation | |
2454 | * was sent | |
2455 | */ | |
2456 | goto out; | |
2457 | } | |
2458 | ||
2459 | spin_lock(&ifp->lock); | |
2460 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { | |
2461 | struct in6_addr all_routers; | |
2462 | ||
2463 | /* The wait after the last probe can be shorter */ | |
2464 | addrconf_mod_timer(ifp, AC_RS, | |
2465 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? | |
2466 | ifp->idev->cnf.rtr_solicit_delay : | |
2467 | ifp->idev->cnf.rtr_solicit_interval); | |
2468 | spin_unlock(&ifp->lock); | |
2469 | ||
2470 | ipv6_addr_all_routers(&all_routers); | |
2471 | ||
2472 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2473 | } else { | |
2474 | spin_unlock(&ifp->lock); | |
2475 | /* | |
2476 | * Note: we do not support deprecated "all on-link" | |
2477 | * assumption any longer. | |
2478 | */ | |
2479 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", | |
2480 | ifp->idev->dev->name); | |
2481 | } | |
2482 | ||
2483 | out: | |
2484 | in6_ifa_put(ifp); | |
2485 | } | |
2486 | ||
2487 | /* | |
2488 | * Duplicate Address Detection | |
2489 | */ | |
3c21edbd YH |
2490 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2491 | { | |
2492 | unsigned long rand_num; | |
2493 | struct inet6_dev *idev = ifp->idev; | |
2494 | ||
2495 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2496 | ifp->probes = idev->cnf.dad_transmits; | |
2497 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2498 | } | |
2499 | ||
e431b8c0 | 2500 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4 LT |
2501 | { |
2502 | struct inet6_dev *idev = ifp->idev; | |
2503 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2504 | |
2505 | addrconf_join_solict(dev, &ifp->addr); | |
2506 | ||
2507 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) | |
2508 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, | |
2509 | flags); | |
2510 | ||
2511 | net_srandom(ifp->addr.s6_addr32[3]); | |
1da177e4 LT |
2512 | |
2513 | read_lock_bh(&idev->lock); | |
2514 | if (ifp->dead) | |
2515 | goto out; | |
2516 | spin_lock_bh(&ifp->lock); | |
2517 | ||
2518 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
2519 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2520 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2521 | spin_unlock_bh(&ifp->lock); | |
2522 | read_unlock_bh(&idev->lock); | |
2523 | ||
2524 | addrconf_dad_completed(ifp); | |
2525 | return; | |
2526 | } | |
2527 | ||
6732bade | 2528 | if (!(idev->if_flags & IF_READY)) { |
3dd3bf83 | 2529 | spin_unlock_bh(&ifp->lock); |
6732bade | 2530 | read_unlock_bh(&idev->lock); |
3c21edbd YH |
2531 | /* |
2532 | * If the defice is not ready: | |
2533 | * - keep it tentative if it is a permanent address. | |
2534 | * - otherwise, kill it. | |
2535 | */ | |
2536 | in6_ifa_hold(ifp); | |
2537 | addrconf_dad_stop(ifp); | |
6732bade | 2538 | return; |
3c21edbd | 2539 | } |
6732bade YH |
2540 | addrconf_dad_kick(ifp); |
2541 | spin_unlock_bh(&ifp->lock); | |
1da177e4 LT |
2542 | out: |
2543 | read_unlock_bh(&idev->lock); | |
2544 | } | |
2545 | ||
2546 | static void addrconf_dad_timer(unsigned long data) | |
2547 | { | |
2548 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2549 | struct inet6_dev *idev = ifp->idev; | |
2550 | struct in6_addr unspec; | |
2551 | struct in6_addr mcaddr; | |
2552 | ||
2553 | read_lock_bh(&idev->lock); | |
2554 | if (idev->dead) { | |
2555 | read_unlock_bh(&idev->lock); | |
2556 | goto out; | |
2557 | } | |
2558 | spin_lock_bh(&ifp->lock); | |
2559 | if (ifp->probes == 0) { | |
2560 | /* | |
2561 | * DAD was successful | |
2562 | */ | |
2563 | ||
2564 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2565 | spin_unlock_bh(&ifp->lock); | |
2566 | read_unlock_bh(&idev->lock); | |
2567 | ||
2568 | addrconf_dad_completed(ifp); | |
2569 | ||
2570 | goto out; | |
2571 | } | |
2572 | ||
2573 | ifp->probes--; | |
2574 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
2575 | spin_unlock_bh(&ifp->lock); | |
2576 | read_unlock_bh(&idev->lock); | |
2577 | ||
2578 | /* send a neighbour solicitation for our addr */ | |
2579 | memset(&unspec, 0, sizeof(unspec)); | |
2580 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); | |
2581 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); | |
2582 | out: | |
2583 | in6_ifa_put(ifp); | |
2584 | } | |
2585 | ||
2586 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
2587 | { | |
2588 | struct net_device * dev = ifp->idev->dev; | |
2589 | ||
2590 | /* | |
2591 | * Configure the address for reception. Now it is valid. | |
2592 | */ | |
2593 | ||
2594 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2595 | ||
2596 | /* If added prefix is link local and forwarding is off, | |
2597 | start sending router solicitations. | |
2598 | */ | |
2599 | ||
2600 | if (ifp->idev->cnf.forwarding == 0 && | |
2601 | ifp->idev->cnf.rtr_solicits > 0 && | |
2602 | (dev->flags&IFF_LOOPBACK) == 0 && | |
2603 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
2604 | struct in6_addr all_routers; | |
2605 | ||
2606 | ipv6_addr_all_routers(&all_routers); | |
2607 | ||
2608 | /* | |
2609 | * If a host as already performed a random delay | |
2610 | * [...] as part of DAD [...] there is no need | |
2611 | * to delay again before sending the first RS | |
2612 | */ | |
2613 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); | |
2614 | ||
2615 | spin_lock_bh(&ifp->lock); | |
2616 | ifp->probes = 1; | |
2617 | ifp->idev->if_flags |= IF_RS_SENT; | |
2618 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
2619 | spin_unlock_bh(&ifp->lock); | |
2620 | } | |
2621 | } | |
2622 | ||
c5e33bdd YH |
2623 | static void addrconf_dad_run(struct inet6_dev *idev) { |
2624 | struct inet6_ifaddr *ifp; | |
2625 | ||
2626 | read_lock_bh(&idev->lock); | |
2627 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { | |
2628 | spin_lock_bh(&ifp->lock); | |
2629 | if (!(ifp->flags & IFA_F_TENTATIVE)) { | |
2630 | spin_unlock_bh(&ifp->lock); | |
2631 | continue; | |
2632 | } | |
2633 | spin_unlock_bh(&ifp->lock); | |
2634 | addrconf_dad_kick(ifp); | |
2635 | } | |
2636 | read_unlock_bh(&idev->lock); | |
2637 | } | |
2638 | ||
1da177e4 LT |
2639 | #ifdef CONFIG_PROC_FS |
2640 | struct if6_iter_state { | |
2641 | int bucket; | |
2642 | }; | |
2643 | ||
2644 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) | |
2645 | { | |
2646 | struct inet6_ifaddr *ifa = NULL; | |
2647 | struct if6_iter_state *state = seq->private; | |
2648 | ||
2649 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
2650 | ifa = inet6_addr_lst[state->bucket]; | |
2651 | if (ifa) | |
2652 | break; | |
2653 | } | |
2654 | return ifa; | |
2655 | } | |
2656 | ||
2657 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) | |
2658 | { | |
2659 | struct if6_iter_state *state = seq->private; | |
2660 | ||
2661 | ifa = ifa->lst_next; | |
2662 | try_again: | |
2663 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { | |
2664 | ifa = inet6_addr_lst[state->bucket]; | |
2665 | goto try_again; | |
2666 | } | |
2667 | return ifa; | |
2668 | } | |
2669 | ||
2670 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) | |
2671 | { | |
2672 | struct inet6_ifaddr *ifa = if6_get_first(seq); | |
2673 | ||
2674 | if (ifa) | |
2675 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) | |
2676 | --pos; | |
2677 | return pos ? NULL : ifa; | |
2678 | } | |
2679 | ||
2680 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) | |
2681 | { | |
2682 | read_lock_bh(&addrconf_hash_lock); | |
2683 | return if6_get_idx(seq, *pos); | |
2684 | } | |
2685 | ||
2686 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2687 | { | |
2688 | struct inet6_ifaddr *ifa; | |
2689 | ||
2690 | ifa = if6_get_next(seq, v); | |
2691 | ++*pos; | |
2692 | return ifa; | |
2693 | } | |
2694 | ||
2695 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
2696 | { | |
2697 | read_unlock_bh(&addrconf_hash_lock); | |
2698 | } | |
2699 | ||
2700 | static int if6_seq_show(struct seq_file *seq, void *v) | |
2701 | { | |
2702 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
2703 | seq_printf(seq, | |
9343e79a | 2704 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
1da177e4 LT |
2705 | NIP6(ifp->addr), |
2706 | ifp->idev->dev->ifindex, | |
2707 | ifp->prefix_len, | |
2708 | ifp->scope, | |
2709 | ifp->flags, | |
2710 | ifp->idev->dev->name); | |
2711 | return 0; | |
2712 | } | |
2713 | ||
2714 | static struct seq_operations if6_seq_ops = { | |
2715 | .start = if6_seq_start, | |
2716 | .next = if6_seq_next, | |
2717 | .show = if6_seq_show, | |
2718 | .stop = if6_seq_stop, | |
2719 | }; | |
2720 | ||
2721 | static int if6_seq_open(struct inode *inode, struct file *file) | |
2722 | { | |
2723 | struct seq_file *seq; | |
2724 | int rc = -ENOMEM; | |
322f74a4 | 2725 | struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
2726 | |
2727 | if (!s) | |
2728 | goto out; | |
1da177e4 LT |
2729 | |
2730 | rc = seq_open(file, &if6_seq_ops); | |
2731 | if (rc) | |
2732 | goto out_kfree; | |
2733 | ||
2734 | seq = file->private_data; | |
2735 | seq->private = s; | |
2736 | out: | |
2737 | return rc; | |
2738 | out_kfree: | |
2739 | kfree(s); | |
2740 | goto out; | |
2741 | } | |
2742 | ||
2743 | static struct file_operations if6_fops = { | |
2744 | .owner = THIS_MODULE, | |
2745 | .open = if6_seq_open, | |
2746 | .read = seq_read, | |
2747 | .llseek = seq_lseek, | |
2748 | .release = seq_release_private, | |
2749 | }; | |
2750 | ||
2751 | int __init if6_proc_init(void) | |
2752 | { | |
2753 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) | |
2754 | return -ENOMEM; | |
2755 | return 0; | |
2756 | } | |
2757 | ||
2758 | void if6_proc_exit(void) | |
2759 | { | |
2760 | proc_net_remove("if_inet6"); | |
2761 | } | |
2762 | #endif /* CONFIG_PROC_FS */ | |
2763 | ||
2764 | /* | |
2765 | * Periodic address status verification | |
2766 | */ | |
2767 | ||
2768 | static void addrconf_verify(unsigned long foo) | |
2769 | { | |
2770 | struct inet6_ifaddr *ifp; | |
2771 | unsigned long now, next; | |
2772 | int i; | |
2773 | ||
2774 | spin_lock_bh(&addrconf_verify_lock); | |
2775 | now = jiffies; | |
2776 | next = now + ADDR_CHECK_FREQUENCY; | |
2777 | ||
2778 | del_timer(&addr_chk_timer); | |
2779 | ||
2780 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
2781 | ||
2782 | restart: | |
5d5780df | 2783 | read_lock(&addrconf_hash_lock); |
1da177e4 LT |
2784 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
2785 | unsigned long age; | |
2786 | #ifdef CONFIG_IPV6_PRIVACY | |
2787 | unsigned long regen_advance; | |
2788 | #endif | |
2789 | ||
2790 | if (ifp->flags & IFA_F_PERMANENT) | |
2791 | continue; | |
2792 | ||
2793 | spin_lock(&ifp->lock); | |
2794 | age = (now - ifp->tstamp) / HZ; | |
2795 | ||
2796 | #ifdef CONFIG_IPV6_PRIVACY | |
2797 | regen_advance = ifp->idev->cnf.regen_max_retry * | |
2798 | ifp->idev->cnf.dad_transmits * | |
2799 | ifp->idev->nd_parms->retrans_time / HZ; | |
2800 | #endif | |
2801 | ||
8f27ebb9 YH |
2802 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
2803 | age >= ifp->valid_lft) { | |
1da177e4 LT |
2804 | spin_unlock(&ifp->lock); |
2805 | in6_ifa_hold(ifp); | |
5d5780df | 2806 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2807 | ipv6_del_addr(ifp); |
2808 | goto restart; | |
8f27ebb9 YH |
2809 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
2810 | spin_unlock(&ifp->lock); | |
2811 | continue; | |
1da177e4 LT |
2812 | } else if (age >= ifp->prefered_lft) { |
2813 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ | |
2814 | int deprecate = 0; | |
2815 | ||
2816 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
2817 | deprecate = 1; | |
2818 | ifp->flags |= IFA_F_DEPRECATED; | |
2819 | } | |
2820 | ||
2821 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
2822 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
2823 | ||
2824 | spin_unlock(&ifp->lock); | |
2825 | ||
2826 | if (deprecate) { | |
2827 | in6_ifa_hold(ifp); | |
5d5780df | 2828 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2829 | |
2830 | ipv6_ifa_notify(0, ifp); | |
2831 | in6_ifa_put(ifp); | |
2832 | goto restart; | |
2833 | } | |
2834 | #ifdef CONFIG_IPV6_PRIVACY | |
2835 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
2836 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
2837 | if (age >= ifp->prefered_lft - regen_advance) { | |
2838 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
2839 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2840 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2841 | if (!ifp->regen_count && ifpub) { | |
2842 | ifp->regen_count++; | |
2843 | in6_ifa_hold(ifp); | |
2844 | in6_ifa_hold(ifpub); | |
2845 | spin_unlock(&ifp->lock); | |
5d5780df | 2846 | read_unlock(&addrconf_hash_lock); |
291d809b HY |
2847 | spin_lock(&ifpub->lock); |
2848 | ifpub->regen_count = 0; | |
2849 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
2850 | ipv6_create_tempaddr(ifpub, ifp); |
2851 | in6_ifa_put(ifpub); | |
2852 | in6_ifa_put(ifp); | |
2853 | goto restart; | |
2854 | } | |
2855 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
2856 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
2857 | spin_unlock(&ifp->lock); | |
2858 | #endif | |
2859 | } else { | |
2860 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
2861 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
2862 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
2863 | spin_unlock(&ifp->lock); | |
2864 | } | |
2865 | } | |
5d5780df | 2866 | read_unlock(&addrconf_hash_lock); |
1da177e4 LT |
2867 | } |
2868 | ||
2869 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; | |
2870 | add_timer(&addr_chk_timer); | |
2871 | spin_unlock_bh(&addrconf_verify_lock); | |
2872 | } | |
2873 | ||
2874 | static int | |
2875 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2876 | { | |
2877 | struct rtattr **rta = arg; | |
2878 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2879 | struct in6_addr *pfx; | |
2880 | ||
2881 | pfx = NULL; | |
2882 | if (rta[IFA_ADDRESS-1]) { | |
2883 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2884 | return -EINVAL; | |
2885 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2886 | } | |
2887 | if (rta[IFA_LOCAL-1]) { | |
64316225 YH |
2888 | if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) || |
2889 | (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))) | |
1da177e4 LT |
2890 | return -EINVAL; |
2891 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2892 | } | |
2893 | if (pfx == NULL) | |
2894 | return -EINVAL; | |
2895 | ||
2896 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); | |
2897 | } | |
2898 | ||
081bba5b NT |
2899 | static int |
2900 | inet6_addr_modify(int ifindex, struct in6_addr *pfx, | |
2901 | __u32 prefered_lft, __u32 valid_lft) | |
2902 | { | |
2903 | struct inet6_ifaddr *ifp = NULL; | |
2904 | struct net_device *dev; | |
2905 | int ifa_flags = 0; | |
2906 | ||
2907 | if ((dev = __dev_get_by_index(ifindex)) == NULL) | |
2908 | return -ENODEV; | |
2909 | ||
2910 | if (!(dev->flags&IFF_UP)) | |
2911 | return -ENETDOWN; | |
2912 | ||
2913 | if (!valid_lft || (prefered_lft > valid_lft)) | |
2914 | return -EINVAL; | |
2915 | ||
2916 | ifp = ipv6_get_ifaddr(pfx, dev, 1); | |
2917 | if (ifp == NULL) | |
2918 | return -ENOENT; | |
2919 | ||
2920 | if (valid_lft == INFINITY_LIFE_TIME) | |
2921 | ifa_flags = IFA_F_PERMANENT; | |
2922 | else if (valid_lft >= 0x7FFFFFFF/HZ) | |
2923 | valid_lft = 0x7FFFFFFF/HZ; | |
2924 | ||
2925 | if (prefered_lft == 0) | |
2926 | ifa_flags = IFA_F_DEPRECATED; | |
2927 | else if ((prefered_lft >= 0x7FFFFFFF/HZ) && | |
2928 | (prefered_lft != INFINITY_LIFE_TIME)) | |
2929 | prefered_lft = 0x7FFFFFFF/HZ; | |
2930 | ||
2931 | spin_lock_bh(&ifp->lock); | |
2932 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED|IFA_F_PERMANENT)) | ifa_flags; | |
2933 | ||
2934 | ifp->tstamp = jiffies; | |
2935 | ifp->valid_lft = valid_lft; | |
2936 | ifp->prefered_lft = prefered_lft; | |
2937 | ||
2938 | spin_unlock_bh(&ifp->lock); | |
2939 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
2940 | ipv6_ifa_notify(0, ifp); | |
2941 | in6_ifa_put(ifp); | |
2942 | ||
2943 | addrconf_verify(0); | |
2944 | ||
2945 | return 0; | |
2946 | } | |
2947 | ||
1da177e4 LT |
2948 | static int |
2949 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
2950 | { | |
2951 | struct rtattr **rta = arg; | |
2952 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
2953 | struct in6_addr *pfx; | |
0778769d | 2954 | __u32 valid_lft = INFINITY_LIFE_TIME, prefered_lft = INFINITY_LIFE_TIME; |
1da177e4 LT |
2955 | |
2956 | pfx = NULL; | |
2957 | if (rta[IFA_ADDRESS-1]) { | |
2958 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) | |
2959 | return -EINVAL; | |
2960 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); | |
2961 | } | |
2962 | if (rta[IFA_LOCAL-1]) { | |
64316225 YH |
2963 | if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) || |
2964 | (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))) | |
1da177e4 LT |
2965 | return -EINVAL; |
2966 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); | |
2967 | } | |
2968 | if (pfx == NULL) | |
2969 | return -EINVAL; | |
2970 | ||
0778769d NT |
2971 | if (rta[IFA_CACHEINFO-1]) { |
2972 | struct ifa_cacheinfo *ci; | |
2973 | if (RTA_PAYLOAD(rta[IFA_CACHEINFO-1]) < sizeof(*ci)) | |
2974 | return -EINVAL; | |
2975 | ci = RTA_DATA(rta[IFA_CACHEINFO-1]); | |
2976 | valid_lft = ci->ifa_valid; | |
2977 | prefered_lft = ci->ifa_prefered; | |
2978 | } | |
2979 | ||
081bba5b NT |
2980 | if (nlh->nlmsg_flags & NLM_F_REPLACE) { |
2981 | int ret; | |
2982 | ret = inet6_addr_modify(ifm->ifa_index, pfx, | |
2983 | prefered_lft, valid_lft); | |
2984 | if (ret == 0 || !(nlh->nlmsg_flags & NLM_F_CREATE)) | |
2985 | return ret; | |
2986 | } | |
2987 | ||
0778769d NT |
2988 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, |
2989 | prefered_lft, valid_lft); | |
2990 | ||
1da177e4 LT |
2991 | } |
2992 | ||
c5396a31 YH |
2993 | /* Maximum length of ifa_cacheinfo attributes */ |
2994 | #define INET6_IFADDR_RTA_SPACE \ | |
2995 | RTA_SPACE(16) /* IFA_ADDRESS */ + \ | |
2996 | RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */ | |
2997 | ||
1da177e4 | 2998 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 2999 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
3000 | { |
3001 | struct ifaddrmsg *ifm; | |
3002 | struct nlmsghdr *nlh; | |
3003 | struct ifa_cacheinfo ci; | |
3004 | unsigned char *b = skb->tail; | |
3005 | ||
b6544c0b | 3006 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
3007 | ifm = NLMSG_DATA(nlh); |
3008 | ifm->ifa_family = AF_INET6; | |
3009 | ifm->ifa_prefixlen = ifa->prefix_len; | |
3010 | ifm->ifa_flags = ifa->flags; | |
3011 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
3012 | if (ifa->scope&IFA_HOST) | |
3013 | ifm->ifa_scope = RT_SCOPE_HOST; | |
3014 | else if (ifa->scope&IFA_LINK) | |
3015 | ifm->ifa_scope = RT_SCOPE_LINK; | |
3016 | else if (ifa->scope&IFA_SITE) | |
3017 | ifm->ifa_scope = RT_SCOPE_SITE; | |
3018 | ifm->ifa_index = ifa->idev->dev->ifindex; | |
3019 | RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr); | |
3020 | if (!(ifa->flags&IFA_F_PERMANENT)) { | |
3021 | ci.ifa_prefered = ifa->prefered_lft; | |
3022 | ci.ifa_valid = ifa->valid_lft; | |
3023 | if (ci.ifa_prefered != INFINITY_LIFE_TIME) { | |
3024 | long tval = (jiffies - ifa->tstamp)/HZ; | |
3025 | ci.ifa_prefered -= tval; | |
3026 | if (ci.ifa_valid != INFINITY_LIFE_TIME) | |
3027 | ci.ifa_valid -= tval; | |
3028 | } | |
3029 | } else { | |
3030 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
3031 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
3032 | } | |
3033 | ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100 | |
3034 | + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3035 | ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3036 | + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3037 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3038 | nlh->nlmsg_len = skb->tail - b; | |
3039 | return skb->len; | |
3040 | ||
3041 | nlmsg_failure: | |
3042 | rtattr_failure: | |
3043 | skb_trim(skb, b - skb->data); | |
3044 | return -1; | |
3045 | } | |
3046 | ||
3047 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3048 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 LT |
3049 | { |
3050 | struct ifaddrmsg *ifm; | |
3051 | struct nlmsghdr *nlh; | |
3052 | struct ifa_cacheinfo ci; | |
3053 | unsigned char *b = skb->tail; | |
3054 | ||
b6544c0b | 3055 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
3056 | ifm = NLMSG_DATA(nlh); |
3057 | ifm->ifa_family = AF_INET6; | |
3058 | ifm->ifa_prefixlen = 128; | |
3059 | ifm->ifa_flags = IFA_F_PERMANENT; | |
3060 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
3061 | if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE) | |
3062 | ifm->ifa_scope = RT_SCOPE_SITE; | |
3063 | ifm->ifa_index = ifmca->idev->dev->ifindex; | |
3064 | RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr); | |
3065 | ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ | |
3066 | * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ | |
3067 | * 100 / HZ); | |
3068 | ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ | |
3069 | * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ | |
3070 | * 100 / HZ); | |
3071 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
3072 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
3073 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3074 | nlh->nlmsg_len = skb->tail - b; | |
3075 | return skb->len; | |
3076 | ||
3077 | nlmsg_failure: | |
3078 | rtattr_failure: | |
3079 | skb_trim(skb, b - skb->data); | |
3080 | return -1; | |
3081 | } | |
3082 | ||
3083 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3084 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
3085 | { |
3086 | struct ifaddrmsg *ifm; | |
3087 | struct nlmsghdr *nlh; | |
3088 | struct ifa_cacheinfo ci; | |
3089 | unsigned char *b = skb->tail; | |
3090 | ||
b6544c0b | 3091 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
3092 | ifm = NLMSG_DATA(nlh); |
3093 | ifm->ifa_family = AF_INET6; | |
3094 | ifm->ifa_prefixlen = 128; | |
3095 | ifm->ifa_flags = IFA_F_PERMANENT; | |
3096 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; | |
3097 | if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE) | |
3098 | ifm->ifa_scope = RT_SCOPE_SITE; | |
3099 | ifm->ifa_index = ifaca->aca_idev->dev->ifindex; | |
3100 | RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr); | |
3101 | ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ | |
3102 | * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ | |
3103 | * 100 / HZ); | |
3104 | ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ | |
3105 | * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ | |
3106 | * 100 / HZ); | |
3107 | ci.ifa_prefered = INFINITY_LIFE_TIME; | |
3108 | ci.ifa_valid = INFINITY_LIFE_TIME; | |
3109 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3110 | nlh->nlmsg_len = skb->tail - b; | |
3111 | return skb->len; | |
3112 | ||
3113 | nlmsg_failure: | |
3114 | rtattr_failure: | |
3115 | skb_trim(skb, b - skb->data); | |
3116 | return -1; | |
3117 | } | |
3118 | ||
3119 | enum addr_type_t | |
3120 | { | |
3121 | UNICAST_ADDR, | |
3122 | MULTICAST_ADDR, | |
3123 | ANYCAST_ADDR, | |
3124 | }; | |
3125 | ||
3126 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, | |
3127 | enum addr_type_t type) | |
3128 | { | |
3129 | int idx, ip_idx; | |
3130 | int s_idx, s_ip_idx; | |
3131 | int err = 1; | |
3132 | struct net_device *dev; | |
3133 | struct inet6_dev *idev = NULL; | |
3134 | struct inet6_ifaddr *ifa; | |
3135 | struct ifmcaddr6 *ifmca; | |
3136 | struct ifacaddr6 *ifaca; | |
3137 | ||
3138 | s_idx = cb->args[0]; | |
3139 | s_ip_idx = ip_idx = cb->args[1]; | |
3140 | read_lock(&dev_base_lock); | |
3141 | ||
3142 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
3143 | if (idx < s_idx) | |
3144 | continue; | |
3145 | if (idx > s_idx) | |
3146 | s_ip_idx = 0; | |
3147 | ip_idx = 0; | |
3148 | if ((idev = in6_dev_get(dev)) == NULL) | |
3149 | continue; | |
3150 | read_lock_bh(&idev->lock); | |
3151 | switch (type) { | |
3152 | case UNICAST_ADDR: | |
ae9cda5d | 3153 | /* unicast address incl. temp addr */ |
1da177e4 LT |
3154 | for (ifa = idev->addr_list; ifa; |
3155 | ifa = ifa->if_next, ip_idx++) { | |
3156 | if (ip_idx < s_ip_idx) | |
3157 | continue; | |
3158 | if ((err = inet6_fill_ifaddr(skb, ifa, | |
3159 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3160 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
3161 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3162 | goto done; |
3163 | } | |
1da177e4 LT |
3164 | break; |
3165 | case MULTICAST_ADDR: | |
3166 | /* multicast address */ | |
3167 | for (ifmca = idev->mc_list; ifmca; | |
3168 | ifmca = ifmca->next, ip_idx++) { | |
3169 | if (ip_idx < s_ip_idx) | |
3170 | continue; | |
3171 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, | |
3172 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3173 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
3174 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3175 | goto done; |
3176 | } | |
3177 | break; | |
3178 | case ANYCAST_ADDR: | |
3179 | /* anycast address */ | |
3180 | for (ifaca = idev->ac_list; ifaca; | |
3181 | ifaca = ifaca->aca_next, ip_idx++) { | |
3182 | if (ip_idx < s_ip_idx) | |
3183 | continue; | |
3184 | if ((err = inet6_fill_ifacaddr(skb, ifaca, | |
3185 | NETLINK_CB(cb->skb).pid, | |
b6544c0b JHS |
3186 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
3187 | NLM_F_MULTI)) <= 0) | |
1da177e4 LT |
3188 | goto done; |
3189 | } | |
3190 | break; | |
3191 | default: | |
3192 | break; | |
3193 | } | |
3194 | read_unlock_bh(&idev->lock); | |
3195 | in6_dev_put(idev); | |
3196 | } | |
3197 | done: | |
3198 | if (err <= 0) { | |
3199 | read_unlock_bh(&idev->lock); | |
3200 | in6_dev_put(idev); | |
3201 | } | |
3202 | read_unlock(&dev_base_lock); | |
3203 | cb->args[0] = idx; | |
3204 | cb->args[1] = ip_idx; | |
3205 | return skb->len; | |
3206 | } | |
3207 | ||
3208 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3209 | { | |
3210 | enum addr_type_t type = UNICAST_ADDR; | |
3211 | return inet6_dump_addr(skb, cb, type); | |
3212 | } | |
3213 | ||
3214 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3215 | { | |
3216 | enum addr_type_t type = MULTICAST_ADDR; | |
3217 | return inet6_dump_addr(skb, cb, type); | |
3218 | } | |
3219 | ||
3220 | ||
3221 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3222 | { | |
3223 | enum addr_type_t type = ANYCAST_ADDR; | |
3224 | return inet6_dump_addr(skb, cb, type); | |
3225 | } | |
3226 | ||
6c223828 NT |
3227 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, |
3228 | struct nlmsghdr* nlh, void *arg) | |
3229 | { | |
3230 | struct rtattr **rta = arg; | |
3231 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
3232 | struct in6_addr *addr = NULL; | |
3233 | struct net_device *dev = NULL; | |
3234 | struct inet6_ifaddr *ifa; | |
3235 | struct sk_buff *skb; | |
3236 | int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE); | |
3237 | int err; | |
3238 | ||
3239 | if (rta[IFA_ADDRESS-1]) { | |
3240 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*addr)) | |
3241 | return -EINVAL; | |
3242 | addr = RTA_DATA(rta[IFA_ADDRESS-1]); | |
3243 | } | |
3244 | if (rta[IFA_LOCAL-1]) { | |
3245 | if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*addr) || | |
3246 | (addr && memcmp(addr, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*addr)))) | |
3247 | return -EINVAL; | |
3248 | addr = RTA_DATA(rta[IFA_LOCAL-1]); | |
3249 | } | |
3250 | if (addr == NULL) | |
3251 | return -EINVAL; | |
3252 | ||
3253 | if (ifm->ifa_index) | |
3254 | dev = __dev_get_by_index(ifm->ifa_index); | |
3255 | ||
3256 | if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) | |
3257 | return -EADDRNOTAVAIL; | |
3258 | ||
3259 | if ((skb = alloc_skb(size, GFP_KERNEL)) == NULL) { | |
3260 | err = -ENOBUFS; | |
3261 | goto out; | |
3262 | } | |
3263 | ||
3264 | NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; | |
3265 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, | |
3266 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
3267 | if (err < 0) { | |
3268 | err = -EMSGSIZE; | |
3269 | goto out_free; | |
3270 | } | |
3271 | ||
2942e900 | 3272 | err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); |
6c223828 NT |
3273 | out: |
3274 | in6_ifa_put(ifa); | |
3275 | return err; | |
3276 | out_free: | |
3277 | kfree_skb(skb); | |
3278 | goto out; | |
3279 | } | |
3280 | ||
1da177e4 LT |
3281 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3282 | { | |
3283 | struct sk_buff *skb; | |
5d620266 TG |
3284 | int payload = sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE; |
3285 | int err = -ENOBUFS; | |
1da177e4 | 3286 | |
5d620266 TG |
3287 | skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC); |
3288 | if (skb == NULL) | |
3289 | goto errout; | |
3290 | ||
3291 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
3292 | if (err < 0) { | |
1da177e4 | 3293 | kfree_skb(skb); |
5d620266 | 3294 | goto errout; |
1da177e4 | 3295 | } |
5d620266 TG |
3296 | |
3297 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3298 | errout: | |
3299 | if (err < 0) | |
3300 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3301 | } |
3302 | ||
3303 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, | |
3304 | __s32 *array, int bytes) | |
3305 | { | |
3306 | memset(array, 0, bytes); | |
3307 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3308 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3309 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3310 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3311 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3312 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3313 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3314 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
3315 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; | |
3316 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; | |
3317 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; | |
3318 | #ifdef CONFIG_IPV6_PRIVACY | |
3319 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3320 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3321 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3322 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3323 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3324 | #endif | |
3325 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3326 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3327 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3328 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3329 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
52e16356 | 3330 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
09c884d4 YH |
3331 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3332 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; | |
3333 | #endif | |
930d6ff2 | 3334 | #endif |
1da177e4 LT |
3335 | } |
3336 | ||
c5396a31 YH |
3337 | /* Maximum length of ifinfomsg attributes */ |
3338 | #define INET6_IFINFO_RTA_SPACE \ | |
3339 | RTA_SPACE(IFNAMSIZ) /* IFNAME */ + \ | |
3340 | RTA_SPACE(MAX_ADDR_LEN) /* ADDRESS */ + \ | |
3341 | RTA_SPACE(sizeof(u32)) /* MTU */ + \ | |
3342 | RTA_SPACE(sizeof(int)) /* LINK */ + \ | |
3343 | RTA_SPACE(0) /* PROTINFO */ + \ | |
3344 | RTA_SPACE(sizeof(u32)) /* FLAGS */ + \ | |
3345 | RTA_SPACE(sizeof(struct ifla_cacheinfo)) /* CACHEINFO */ + \ | |
3346 | RTA_SPACE(sizeof(__s32[DEVCONF_MAX])) /* CONF */ | |
3347 | ||
1da177e4 | 3348 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 3349 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
3350 | { |
3351 | struct net_device *dev = idev->dev; | |
3352 | __s32 *array = NULL; | |
3353 | struct ifinfomsg *r; | |
3354 | struct nlmsghdr *nlh; | |
3355 | unsigned char *b = skb->tail; | |
3356 | struct rtattr *subattr; | |
3357 | __u32 mtu = dev->mtu; | |
3358 | struct ifla_cacheinfo ci; | |
3359 | ||
b6544c0b | 3360 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); |
1da177e4 LT |
3361 | r = NLMSG_DATA(nlh); |
3362 | r->ifi_family = AF_INET6; | |
9ef1d4c7 | 3363 | r->__ifi_pad = 0; |
1da177e4 LT |
3364 | r->ifi_type = dev->type; |
3365 | r->ifi_index = dev->ifindex; | |
3366 | r->ifi_flags = dev_get_flags(dev); | |
3367 | r->ifi_change = 0; | |
3368 | ||
3369 | RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); | |
3370 | ||
3371 | if (dev->addr_len) | |
3372 | RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); | |
3373 | ||
3374 | RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); | |
3375 | if (dev->ifindex != dev->iflink) | |
3376 | RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink); | |
3377 | ||
3378 | subattr = (struct rtattr*)skb->tail; | |
3379 | ||
3380 | RTA_PUT(skb, IFLA_PROTINFO, 0, NULL); | |
3381 | ||
3382 | /* return the device flags */ | |
3383 | RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags); | |
3384 | ||
3385 | /* return interface cacheinfo */ | |
3386 | ci.max_reasm_len = IPV6_MAXPLEN; | |
3387 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 | |
3388 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); | |
3389 | ci.reachable_time = idev->nd_parms->reachable_time; | |
3390 | ci.retrans_time = idev->nd_parms->retrans_time; | |
3391 | RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); | |
3392 | ||
3393 | /* return the device sysctl params */ | |
3394 | if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL) | |
3395 | goto rtattr_failure; | |
3396 | ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array)); | |
3397 | RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array); | |
3398 | ||
3399 | /* XXX - Statistics/MC not implemented */ | |
3400 | subattr->rta_len = skb->tail - (u8*)subattr; | |
3401 | ||
3402 | nlh->nlmsg_len = skb->tail - b; | |
3403 | kfree(array); | |
3404 | return skb->len; | |
3405 | ||
3406 | nlmsg_failure: | |
3407 | rtattr_failure: | |
a51482bd | 3408 | kfree(array); |
1da177e4 LT |
3409 | skb_trim(skb, b - skb->data); |
3410 | return -1; | |
3411 | } | |
3412 | ||
3413 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
3414 | { | |
3415 | int idx, err; | |
3416 | int s_idx = cb->args[0]; | |
3417 | struct net_device *dev; | |
3418 | struct inet6_dev *idev; | |
3419 | ||
3420 | read_lock(&dev_base_lock); | |
3421 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
3422 | if (idx < s_idx) | |
3423 | continue; | |
3424 | if ((idev = in6_dev_get(dev)) == NULL) | |
3425 | continue; | |
3426 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, | |
b6544c0b | 3427 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
1da177e4 LT |
3428 | in6_dev_put(idev); |
3429 | if (err <= 0) | |
3430 | break; | |
3431 | } | |
3432 | read_unlock(&dev_base_lock); | |
3433 | cb->args[0] = idx; | |
3434 | ||
3435 | return skb->len; | |
3436 | } | |
3437 | ||
3438 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
3439 | { | |
3440 | struct sk_buff *skb; | |
8d7a76c9 TG |
3441 | int payload = sizeof(struct ifinfomsg) + INET6_IFINFO_RTA_SPACE; |
3442 | int err = -ENOBUFS; | |
1da177e4 | 3443 | |
8d7a76c9 TG |
3444 | skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC); |
3445 | if (skb == NULL) | |
3446 | goto errout; | |
3447 | ||
3448 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
3449 | if (err < 0) { | |
1da177e4 | 3450 | kfree_skb(skb); |
8d7a76c9 | 3451 | goto errout; |
1da177e4 | 3452 | } |
8d7a76c9 TG |
3453 | |
3454 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); | |
3455 | errout: | |
3456 | if (err < 0) | |
3457 | rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); | |
1da177e4 LT |
3458 | } |
3459 | ||
c5396a31 YH |
3460 | /* Maximum length of prefix_cacheinfo attributes */ |
3461 | #define INET6_PREFIX_RTA_SPACE \ | |
3462 | RTA_SPACE(sizeof(((struct prefix_info *)NULL)->prefix)) /* ADDRESS */ + \ | |
3463 | RTA_SPACE(sizeof(struct prefix_cacheinfo)) /* CACHEINFO */ | |
3464 | ||
1da177e4 | 3465 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b JHS |
3466 | struct prefix_info *pinfo, u32 pid, u32 seq, |
3467 | int event, unsigned int flags) | |
1da177e4 LT |
3468 | { |
3469 | struct prefixmsg *pmsg; | |
3470 | struct nlmsghdr *nlh; | |
3471 | unsigned char *b = skb->tail; | |
3472 | struct prefix_cacheinfo ci; | |
3473 | ||
b6544c0b | 3474 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); |
1da177e4 LT |
3475 | pmsg = NLMSG_DATA(nlh); |
3476 | pmsg->prefix_family = AF_INET6; | |
8a47077a PM |
3477 | pmsg->prefix_pad1 = 0; |
3478 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
3479 | pmsg->prefix_ifindex = idev->dev->ifindex; |
3480 | pmsg->prefix_len = pinfo->prefix_len; | |
3481 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 3482 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
3483 | |
3484 | pmsg->prefix_flags = 0; | |
3485 | if (pinfo->onlink) | |
3486 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
3487 | if (pinfo->autoconf) | |
3488 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
3489 | ||
3490 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); | |
3491 | ||
3492 | ci.preferred_time = ntohl(pinfo->prefered); | |
3493 | ci.valid_time = ntohl(pinfo->valid); | |
3494 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); | |
3495 | ||
3496 | nlh->nlmsg_len = skb->tail - b; | |
3497 | return skb->len; | |
3498 | ||
3499 | nlmsg_failure: | |
3500 | rtattr_failure: | |
3501 | skb_trim(skb, b - skb->data); | |
3502 | return -1; | |
3503 | } | |
3504 | ||
3505 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, | |
3506 | struct prefix_info *pinfo) | |
3507 | { | |
3508 | struct sk_buff *skb; | |
8c384bfa TG |
3509 | int payload = sizeof(struct prefixmsg) + INET6_PREFIX_RTA_SPACE; |
3510 | int err = -ENOBUFS; | |
1da177e4 | 3511 | |
8c384bfa TG |
3512 | skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC); |
3513 | if (skb == NULL) | |
3514 | goto errout; | |
3515 | ||
3516 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
3517 | if (err < 0) { | |
1da177e4 | 3518 | kfree_skb(skb); |
8c384bfa | 3519 | goto errout; |
1da177e4 | 3520 | } |
8c384bfa TG |
3521 | |
3522 | err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); | |
3523 | errout: | |
3524 | if (err < 0) | |
3525 | rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); | |
1da177e4 LT |
3526 | } |
3527 | ||
db46edc6 | 3528 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
1da177e4 LT |
3529 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
3530 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, | |
3531 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, | |
6c223828 NT |
3532 | [RTM_GETADDR - RTM_BASE] = { .doit = inet6_rtm_getaddr, |
3533 | .dumpit = inet6_dump_ifaddr, }, | |
1da177e4 LT |
3534 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
3535 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, | |
3536 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, | |
3537 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, | |
3538 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, | |
3539 | .dumpit = inet6_dump_fib, }, | |
8423a9aa | 3540 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
101367c2 | 3541 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib6_rules_dump, }, |
8423a9aa | 3542 | #endif |
1da177e4 LT |
3543 | }; |
3544 | ||
3545 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3546 | { | |
3547 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
3548 | ||
3549 | switch (event) { | |
3550 | case RTM_NEWADDR: | |
4641e7a3 | 3551 | ip6_ins_rt(ifp->rt, NULL, NULL, NULL); |
1da177e4 LT |
3552 | if (ifp->idev->cnf.forwarding) |
3553 | addrconf_join_anycast(ifp); | |
3554 | break; | |
3555 | case RTM_DELADDR: | |
3556 | if (ifp->idev->cnf.forwarding) | |
3557 | addrconf_leave_anycast(ifp); | |
3558 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
3559 | dst_hold(&ifp->rt->u.dst); | |
e0a1ad73 | 3560 | if (ip6_del_rt(ifp->rt)) |
1da177e4 | 3561 | dst_free(&ifp->rt->u.dst); |
1da177e4 LT |
3562 | break; |
3563 | } | |
3564 | } | |
3565 | ||
3566 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
3567 | { | |
3568 | read_lock_bh(&addrconf_lock); | |
3569 | if (likely(ifp->idev->dead == 0)) | |
3570 | __ipv6_ifa_notify(event, ifp); | |
3571 | read_unlock_bh(&addrconf_lock); | |
3572 | } | |
3573 | ||
3574 | #ifdef CONFIG_SYSCTL | |
3575 | ||
3576 | static | |
3577 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, | |
3578 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3579 | { | |
3580 | int *valp = ctl->data; | |
3581 | int val = *valp; | |
3582 | int ret; | |
3583 | ||
3584 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
3585 | ||
3586 | if (write && valp != &ipv6_devconf_dflt.forwarding) { | |
3587 | if (valp != &ipv6_devconf.forwarding) { | |
3588 | if ((!*valp) ^ (!val)) { | |
3589 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
3590 | if (idev == NULL) | |
3591 | return ret; | |
3592 | dev_forward_change(idev); | |
3593 | } | |
3594 | } else { | |
3595 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; | |
3596 | addrconf_forward_change(); | |
3597 | } | |
3598 | if (*valp) | |
3599 | rt6_purge_dflt_routers(); | |
3600 | } | |
3601 | ||
3602 | return ret; | |
3603 | } | |
3604 | ||
3605 | static int addrconf_sysctl_forward_strategy(ctl_table *table, | |
3606 | int __user *name, int nlen, | |
3607 | void __user *oldval, | |
3608 | size_t __user *oldlenp, | |
3609 | void __user *newval, size_t newlen, | |
3610 | void **context) | |
3611 | { | |
3612 | int *valp = table->data; | |
3613 | int new; | |
3614 | ||
3615 | if (!newval || !newlen) | |
3616 | return 0; | |
3617 | if (newlen != sizeof(int)) | |
3618 | return -EINVAL; | |
3619 | if (get_user(new, (int __user *)newval)) | |
3620 | return -EFAULT; | |
3621 | if (new == *valp) | |
3622 | return 0; | |
3623 | if (oldval && oldlenp) { | |
3624 | size_t len; | |
3625 | if (get_user(len, oldlenp)) | |
3626 | return -EFAULT; | |
3627 | if (len) { | |
3628 | if (len > table->maxlen) | |
3629 | len = table->maxlen; | |
3630 | if (copy_to_user(oldval, valp, len)) | |
3631 | return -EFAULT; | |
3632 | if (put_user(len, oldlenp)) | |
3633 | return -EFAULT; | |
3634 | } | |
3635 | } | |
3636 | ||
3637 | if (valp != &ipv6_devconf_dflt.forwarding) { | |
3638 | if (valp != &ipv6_devconf.forwarding) { | |
3639 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; | |
3640 | int changed; | |
3641 | if (unlikely(idev == NULL)) | |
3642 | return -ENODEV; | |
3643 | changed = (!*valp) ^ (!new); | |
3644 | *valp = new; | |
3645 | if (changed) | |
3646 | dev_forward_change(idev); | |
3647 | } else { | |
3648 | *valp = new; | |
3649 | addrconf_forward_change(); | |
3650 | } | |
3651 | ||
3652 | if (*valp) | |
3653 | rt6_purge_dflt_routers(); | |
3654 | } else | |
3655 | *valp = new; | |
3656 | ||
3657 | return 1; | |
3658 | } | |
3659 | ||
3660 | static struct addrconf_sysctl_table | |
3661 | { | |
3662 | struct ctl_table_header *sysctl_header; | |
3663 | ctl_table addrconf_vars[__NET_IPV6_MAX]; | |
3664 | ctl_table addrconf_dev[2]; | |
3665 | ctl_table addrconf_conf_dir[2]; | |
3666 | ctl_table addrconf_proto_dir[2]; | |
3667 | ctl_table addrconf_root_dir[2]; | |
ab32ea5d | 3668 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
3669 | .sysctl_header = NULL, |
3670 | .addrconf_vars = { | |
3671 | { | |
3672 | .ctl_name = NET_IPV6_FORWARDING, | |
3673 | .procname = "forwarding", | |
3674 | .data = &ipv6_devconf.forwarding, | |
3675 | .maxlen = sizeof(int), | |
3676 | .mode = 0644, | |
3677 | .proc_handler = &addrconf_sysctl_forward, | |
3678 | .strategy = &addrconf_sysctl_forward_strategy, | |
3679 | }, | |
3680 | { | |
3681 | .ctl_name = NET_IPV6_HOP_LIMIT, | |
3682 | .procname = "hop_limit", | |
3683 | .data = &ipv6_devconf.hop_limit, | |
3684 | .maxlen = sizeof(int), | |
3685 | .mode = 0644, | |
3686 | .proc_handler = proc_dointvec, | |
3687 | }, | |
3688 | { | |
3689 | .ctl_name = NET_IPV6_MTU, | |
3690 | .procname = "mtu", | |
3691 | .data = &ipv6_devconf.mtu6, | |
3692 | .maxlen = sizeof(int), | |
3693 | .mode = 0644, | |
3694 | .proc_handler = &proc_dointvec, | |
3695 | }, | |
3696 | { | |
3697 | .ctl_name = NET_IPV6_ACCEPT_RA, | |
3698 | .procname = "accept_ra", | |
3699 | .data = &ipv6_devconf.accept_ra, | |
3700 | .maxlen = sizeof(int), | |
3701 | .mode = 0644, | |
3702 | .proc_handler = &proc_dointvec, | |
3703 | }, | |
3704 | { | |
3705 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, | |
3706 | .procname = "accept_redirects", | |
3707 | .data = &ipv6_devconf.accept_redirects, | |
3708 | .maxlen = sizeof(int), | |
3709 | .mode = 0644, | |
3710 | .proc_handler = &proc_dointvec, | |
3711 | }, | |
3712 | { | |
3713 | .ctl_name = NET_IPV6_AUTOCONF, | |
3714 | .procname = "autoconf", | |
3715 | .data = &ipv6_devconf.autoconf, | |
3716 | .maxlen = sizeof(int), | |
3717 | .mode = 0644, | |
3718 | .proc_handler = &proc_dointvec, | |
3719 | }, | |
3720 | { | |
3721 | .ctl_name = NET_IPV6_DAD_TRANSMITS, | |
3722 | .procname = "dad_transmits", | |
3723 | .data = &ipv6_devconf.dad_transmits, | |
3724 | .maxlen = sizeof(int), | |
3725 | .mode = 0644, | |
3726 | .proc_handler = &proc_dointvec, | |
3727 | }, | |
3728 | { | |
3729 | .ctl_name = NET_IPV6_RTR_SOLICITS, | |
3730 | .procname = "router_solicitations", | |
3731 | .data = &ipv6_devconf.rtr_solicits, | |
3732 | .maxlen = sizeof(int), | |
3733 | .mode = 0644, | |
3734 | .proc_handler = &proc_dointvec, | |
3735 | }, | |
3736 | { | |
3737 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, | |
3738 | .procname = "router_solicitation_interval", | |
3739 | .data = &ipv6_devconf.rtr_solicit_interval, | |
3740 | .maxlen = sizeof(int), | |
3741 | .mode = 0644, | |
3742 | .proc_handler = &proc_dointvec_jiffies, | |
3743 | .strategy = &sysctl_jiffies, | |
3744 | }, | |
3745 | { | |
3746 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, | |
3747 | .procname = "router_solicitation_delay", | |
3748 | .data = &ipv6_devconf.rtr_solicit_delay, | |
3749 | .maxlen = sizeof(int), | |
3750 | .mode = 0644, | |
3751 | .proc_handler = &proc_dointvec_jiffies, | |
3752 | .strategy = &sysctl_jiffies, | |
3753 | }, | |
3754 | { | |
3755 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, | |
3756 | .procname = "force_mld_version", | |
3757 | .data = &ipv6_devconf.force_mld_version, | |
3758 | .maxlen = sizeof(int), | |
3759 | .mode = 0644, | |
3760 | .proc_handler = &proc_dointvec, | |
3761 | }, | |
3762 | #ifdef CONFIG_IPV6_PRIVACY | |
3763 | { | |
3764 | .ctl_name = NET_IPV6_USE_TEMPADDR, | |
3765 | .procname = "use_tempaddr", | |
3766 | .data = &ipv6_devconf.use_tempaddr, | |
3767 | .maxlen = sizeof(int), | |
3768 | .mode = 0644, | |
3769 | .proc_handler = &proc_dointvec, | |
3770 | }, | |
3771 | { | |
3772 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, | |
3773 | .procname = "temp_valid_lft", | |
3774 | .data = &ipv6_devconf.temp_valid_lft, | |
3775 | .maxlen = sizeof(int), | |
3776 | .mode = 0644, | |
3777 | .proc_handler = &proc_dointvec, | |
3778 | }, | |
3779 | { | |
3780 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, | |
3781 | .procname = "temp_prefered_lft", | |
3782 | .data = &ipv6_devconf.temp_prefered_lft, | |
3783 | .maxlen = sizeof(int), | |
3784 | .mode = 0644, | |
3785 | .proc_handler = &proc_dointvec, | |
3786 | }, | |
3787 | { | |
3788 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, | |
3789 | .procname = "regen_max_retry", | |
3790 | .data = &ipv6_devconf.regen_max_retry, | |
3791 | .maxlen = sizeof(int), | |
3792 | .mode = 0644, | |
3793 | .proc_handler = &proc_dointvec, | |
3794 | }, | |
3795 | { | |
3796 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, | |
3797 | .procname = "max_desync_factor", | |
3798 | .data = &ipv6_devconf.max_desync_factor, | |
3799 | .maxlen = sizeof(int), | |
3800 | .mode = 0644, | |
3801 | .proc_handler = &proc_dointvec, | |
3802 | }, | |
3803 | #endif | |
3804 | { | |
3805 | .ctl_name = NET_IPV6_MAX_ADDRESSES, | |
3806 | .procname = "max_addresses", | |
3807 | .data = &ipv6_devconf.max_addresses, | |
3808 | .maxlen = sizeof(int), | |
3809 | .mode = 0644, | |
3810 | .proc_handler = &proc_dointvec, | |
3811 | }, | |
65f5c7c1 YH |
3812 | { |
3813 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, | |
3814 | .procname = "accept_ra_defrtr", | |
3815 | .data = &ipv6_devconf.accept_ra_defrtr, | |
3816 | .maxlen = sizeof(int), | |
3817 | .mode = 0644, | |
3818 | .proc_handler = &proc_dointvec, | |
3819 | }, | |
c4fd30eb YH |
3820 | { |
3821 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, | |
3822 | .procname = "accept_ra_pinfo", | |
3823 | .data = &ipv6_devconf.accept_ra_pinfo, | |
3824 | .maxlen = sizeof(int), | |
3825 | .mode = 0644, | |
3826 | .proc_handler = &proc_dointvec, | |
3827 | }, | |
930d6ff2 YH |
3828 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3829 | { | |
3830 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, | |
3831 | .procname = "accept_ra_rtr_pref", | |
3832 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
3833 | .maxlen = sizeof(int), | |
3834 | .mode = 0644, | |
3835 | .proc_handler = &proc_dointvec, | |
3836 | }, | |
52e16356 YH |
3837 | { |
3838 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, | |
3839 | .procname = "router_probe_interval", | |
3840 | .data = &ipv6_devconf.rtr_probe_interval, | |
3841 | .maxlen = sizeof(int), | |
3842 | .mode = 0644, | |
3843 | .proc_handler = &proc_dointvec_jiffies, | |
3844 | .strategy = &sysctl_jiffies, | |
3845 | }, | |
09c884d4 YH |
3846 | #ifdef CONFIV_IPV6_ROUTE_INFO |
3847 | { | |
3848 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, | |
3849 | .procname = "accept_ra_rt_info_max_plen", | |
3850 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
3851 | .maxlen = sizeof(int), | |
3852 | .mode = 0644, | |
3853 | .proc_handler = &proc_dointvec, | |
3854 | }, | |
3855 | #endif | |
930d6ff2 | 3856 | #endif |
1da177e4 LT |
3857 | { |
3858 | .ctl_name = 0, /* sentinel */ | |
3859 | } | |
3860 | }, | |
3861 | .addrconf_dev = { | |
3862 | { | |
3863 | .ctl_name = NET_PROTO_CONF_ALL, | |
3864 | .procname = "all", | |
3865 | .mode = 0555, | |
3866 | .child = addrconf_sysctl.addrconf_vars, | |
3867 | }, | |
3868 | { | |
3869 | .ctl_name = 0, /* sentinel */ | |
3870 | } | |
3871 | }, | |
3872 | .addrconf_conf_dir = { | |
3873 | { | |
3874 | .ctl_name = NET_IPV6_CONF, | |
3875 | .procname = "conf", | |
3876 | .mode = 0555, | |
3877 | .child = addrconf_sysctl.addrconf_dev, | |
3878 | }, | |
3879 | { | |
3880 | .ctl_name = 0, /* sentinel */ | |
3881 | } | |
3882 | }, | |
3883 | .addrconf_proto_dir = { | |
3884 | { | |
3885 | .ctl_name = NET_IPV6, | |
3886 | .procname = "ipv6", | |
3887 | .mode = 0555, | |
3888 | .child = addrconf_sysctl.addrconf_conf_dir, | |
3889 | }, | |
3890 | { | |
3891 | .ctl_name = 0, /* sentinel */ | |
3892 | } | |
3893 | }, | |
3894 | .addrconf_root_dir = { | |
3895 | { | |
3896 | .ctl_name = CTL_NET, | |
3897 | .procname = "net", | |
3898 | .mode = 0555, | |
3899 | .child = addrconf_sysctl.addrconf_proto_dir, | |
3900 | }, | |
3901 | { | |
3902 | .ctl_name = 0, /* sentinel */ | |
3903 | } | |
3904 | }, | |
3905 | }; | |
3906 | ||
3907 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) | |
3908 | { | |
3909 | int i; | |
3910 | struct net_device *dev = idev ? idev->dev : NULL; | |
3911 | struct addrconf_sysctl_table *t; | |
3912 | char *dev_name = NULL; | |
3913 | ||
3914 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
3915 | if (t == NULL) | |
3916 | return; | |
3917 | memcpy(t, &addrconf_sysctl, sizeof(*t)); | |
3918 | for (i=0; t->addrconf_vars[i].data; i++) { | |
3919 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; | |
3920 | t->addrconf_vars[i].de = NULL; | |
3921 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ | |
3922 | } | |
3923 | if (dev) { | |
3924 | dev_name = dev->name; | |
3925 | t->addrconf_dev[0].ctl_name = dev->ifindex; | |
3926 | } else { | |
3927 | dev_name = "default"; | |
3928 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
3929 | } | |
3930 | ||
3931 | /* | |
3932 | * Make a copy of dev_name, because '.procname' is regarded as const | |
3933 | * by sysctl and we wouldn't want anyone to change it under our feet | |
3934 | * (see SIOCSIFNAME). | |
3935 | */ | |
543537bd | 3936 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
3937 | if (!dev_name) |
3938 | goto free; | |
3939 | ||
3940 | t->addrconf_dev[0].procname = dev_name; | |
3941 | ||
3942 | t->addrconf_dev[0].child = t->addrconf_vars; | |
3943 | t->addrconf_dev[0].de = NULL; | |
3944 | t->addrconf_conf_dir[0].child = t->addrconf_dev; | |
3945 | t->addrconf_conf_dir[0].de = NULL; | |
3946 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; | |
3947 | t->addrconf_proto_dir[0].de = NULL; | |
3948 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; | |
3949 | t->addrconf_root_dir[0].de = NULL; | |
3950 | ||
3951 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); | |
3952 | if (t->sysctl_header == NULL) | |
3953 | goto free_procname; | |
3954 | else | |
3955 | p->sysctl = t; | |
3956 | return; | |
3957 | ||
3958 | /* error path */ | |
3959 | free_procname: | |
3960 | kfree(dev_name); | |
3961 | free: | |
3962 | kfree(t); | |
3963 | ||
3964 | return; | |
3965 | } | |
3966 | ||
3967 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) | |
3968 | { | |
3969 | if (p->sysctl) { | |
3970 | struct addrconf_sysctl_table *t = p->sysctl; | |
3971 | p->sysctl = NULL; | |
3972 | unregister_sysctl_table(t->sysctl_header); | |
3973 | kfree(t->addrconf_dev[0].procname); | |
3974 | kfree(t); | |
3975 | } | |
3976 | } | |
3977 | ||
3978 | ||
3979 | #endif | |
3980 | ||
3981 | /* | |
3982 | * Device notifier | |
3983 | */ | |
3984 | ||
3985 | int register_inet6addr_notifier(struct notifier_block *nb) | |
3986 | { | |
e041c683 | 3987 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 LT |
3988 | } |
3989 | ||
3990 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
3991 | { | |
e041c683 | 3992 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
1da177e4 LT |
3993 | } |
3994 | ||
3995 | /* | |
3996 | * Init / cleanup code | |
3997 | */ | |
3998 | ||
3999 | int __init addrconf_init(void) | |
4000 | { | |
4001 | int err = 0; | |
4002 | ||
4003 | /* The addrconf netdev notifier requires that loopback_dev | |
4004 | * has it's ipv6 private information allocated and setup | |
4005 | * before it can bring up and give link-local addresses | |
4006 | * to other devices which are up. | |
4007 | * | |
4008 | * Unfortunately, loopback_dev is not necessarily the first | |
4009 | * entry in the global dev_base list of net devices. In fact, | |
4010 | * it is likely to be the very last entry on that list. | |
4011 | * So this causes the notifier registry below to try and | |
4012 | * give link-local addresses to all devices besides loopback_dev | |
4013 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4014 | * devices to fail to get a link-local address. | |
4015 | * | |
4016 | * So, as a temporary fix, allocate the ipv6 structure for | |
4017 | * loopback_dev first by hand. | |
4018 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4019 | * device and it being up should be removed. | |
4020 | */ | |
4021 | rtnl_lock(); | |
4022 | if (!ipv6_add_dev(&loopback_dev)) | |
4023 | err = -ENOMEM; | |
4024 | rtnl_unlock(); | |
4025 | if (err) | |
4026 | return err; | |
4027 | ||
c62dba90 HX |
4028 | ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev); |
4029 | ||
1da177e4 LT |
4030 | register_netdevice_notifier(&ipv6_dev_notf); |
4031 | ||
1da177e4 LT |
4032 | addrconf_verify(0); |
4033 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; | |
4034 | #ifdef CONFIG_SYSCTL | |
4035 | addrconf_sysctl.sysctl_header = | |
4036 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); | |
4037 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); | |
4038 | #endif | |
4039 | ||
4040 | return 0; | |
4041 | } | |
4042 | ||
4043 | void __exit addrconf_cleanup(void) | |
4044 | { | |
4045 | struct net_device *dev; | |
4046 | struct inet6_dev *idev; | |
4047 | struct inet6_ifaddr *ifa; | |
4048 | int i; | |
4049 | ||
4050 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
4051 | ||
4052 | rtnetlink_links[PF_INET6] = NULL; | |
4053 | #ifdef CONFIG_SYSCTL | |
4054 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); | |
4055 | addrconf_sysctl_unregister(&ipv6_devconf); | |
4056 | #endif | |
4057 | ||
4058 | rtnl_lock(); | |
4059 | ||
4060 | /* | |
4061 | * clean dev list. | |
4062 | */ | |
4063 | ||
4064 | for (dev=dev_base; dev; dev=dev->next) { | |
4065 | if ((idev = __in6_dev_get(dev)) == NULL) | |
4066 | continue; | |
4067 | addrconf_ifdown(dev, 1); | |
4068 | } | |
4069 | addrconf_ifdown(&loopback_dev, 2); | |
4070 | ||
4071 | /* | |
4072 | * Check hash table. | |
4073 | */ | |
4074 | ||
4075 | write_lock_bh(&addrconf_hash_lock); | |
4076 | for (i=0; i < IN6_ADDR_HSIZE; i++) { | |
4077 | for (ifa=inet6_addr_lst[i]; ifa; ) { | |
4078 | struct inet6_ifaddr *bifa; | |
4079 | ||
4080 | bifa = ifa; | |
4081 | ifa = ifa->lst_next; | |
4082 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); | |
4083 | /* Do not free it; something is wrong. | |
4084 | Now we can investigate it with debugger. | |
4085 | */ | |
4086 | } | |
4087 | } | |
4088 | write_unlock_bh(&addrconf_hash_lock); | |
4089 | ||
4090 | del_timer(&addr_chk_timer); | |
4091 | ||
4092 | rtnl_unlock(); | |
4093 | ||
1da177e4 LT |
4094 | #ifdef CONFIG_PROC_FS |
4095 | proc_net_remove("if_inet6"); | |
4096 | #endif | |
4097 | } |