blob: ff7ae05f72e15bdc9af230deff6c14bda7fa02f1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09006 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * Changes:
17 *
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
21 * unload.
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
24 * packets.
25 * yoshfuji@USAGI : Fixed interval between DAD
26 * packets.
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
30 * support.
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
35 * seq_file.
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -080036 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
38 * status etc.
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 */
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/errno.h>
42#include <linux/types.h>
43#include <linux/socket.h>
44#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/net.h>
46#include <linux/in6.h>
47#include <linux/netdevice.h>
Thomas Graf18237302006-08-04 23:04:54 -070048#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/if_arp.h>
50#include <linux/if_arcnet.h>
51#include <linux/if_infiniband.h>
52#include <linux/route.h>
53#include <linux/inetdevice.h>
54#include <linux/init.h>
55#ifdef CONFIG_SYSCTL
56#include <linux/sysctl.h>
57#endif
Randy Dunlap4fc268d2006-01-11 12:17:47 -080058#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/delay.h>
60#include <linux/notifier.h>
Paulo Marques543537b2005-06-23 00:09:02 -070061#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020063#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <net/sock.h>
65#include <net/snmp.h>
66
67#include <net/ipv6.h>
68#include <net/protocol.h>
69#include <net/ndisc.h>
70#include <net/ip6_route.h>
71#include <net/addrconf.h>
72#include <net/tcp.h>
73#include <net/ip.h>
Thomas Graf5d620262006-08-15 00:35:02 -070074#include <net/netlink.h>
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -070075#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include <linux/if_tunnel.h>
77#include <linux/rtnetlink.h>
78
79#ifdef CONFIG_IPV6_PRIVACY
80#include <linux/random.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#endif
82
83#include <asm/uaccess.h>
Herbert Xu7f7d9a62007-04-24 21:54:09 -070084#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
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
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100102static void addrconf_sysctl_register(struct inet6_dev *idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800103static void addrconf_sysctl_unregister(struct inet6_dev *idev);
104#else
105static inline void addrconf_sysctl_register(struct inet6_dev *idev)
106{
107}
108
109static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
110{
111}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112#endif
113
114#ifdef CONFIG_IPV6_PRIVACY
115static int __ipv6_regen_rndid(struct inet6_dev *idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900116static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117static void ipv6_regen_rndid(unsigned long data);
118
119static int desync_factor = MAX_DESYNC_FACTOR * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120#endif
121
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900122static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static int ipv6_count_addresses(struct inet6_dev *idev);
124
125/*
126 * Configured unicast address hash table
127 */
128static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
129static DEFINE_RWLOCK(addrconf_hash_lock);
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131static void addrconf_verify(unsigned long);
132
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700133static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static DEFINE_SPINLOCK(addrconf_verify_lock);
135
136static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
137static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
138
139static int addrconf_ifdown(struct net_device *dev, int how);
140
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -0700141static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static void addrconf_dad_timer(unsigned long data);
143static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900144static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145static void addrconf_rs_timer(unsigned long data);
146static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
147static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900149static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 struct prefix_info *pinfo);
Daniel Lezcano06bfe652008-01-10 22:43:42 -0800151static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
152 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Alan Sterne041c682006-03-27 01:16:30 -0800154static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Adrian Bunk888c8482008-07-22 14:21:58 -0700156static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 .forwarding = 0,
158 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
159 .mtu6 = IPV6_MIN_MTU,
160 .accept_ra = 1,
161 .accept_redirects = 1,
162 .autoconf = 1,
163 .force_mld_version = 0,
164 .dad_transmits = 1,
165 .rtr_solicits = MAX_RTR_SOLICITATIONS,
166 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
167 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
168#ifdef CONFIG_IPV6_PRIVACY
169 .use_tempaddr = 0,
170 .temp_valid_lft = TEMP_VALID_LIFETIME,
171 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
172 .regen_max_retry = REGEN_MAX_RETRY,
173 .max_desync_factor = MAX_DESYNC_FACTOR,
174#endif
175 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800176 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800177 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800178#ifdef CONFIG_IPV6_ROUTER_PREF
179 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800180 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800181#ifdef CONFIG_IPV6_ROUTE_INFO
182 .accept_ra_rt_info_max_plen = 0,
183#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800184#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700185 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700186 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900187 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900188 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189};
190
Brian Haleyab32ea52006-09-22 14:15:41 -0700191static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 .forwarding = 0,
193 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
194 .mtu6 = IPV6_MIN_MTU,
195 .accept_ra = 1,
196 .accept_redirects = 1,
197 .autoconf = 1,
198 .dad_transmits = 1,
199 .rtr_solicits = MAX_RTR_SOLICITATIONS,
200 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
201 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
202#ifdef CONFIG_IPV6_PRIVACY
203 .use_tempaddr = 0,
204 .temp_valid_lft = TEMP_VALID_LIFETIME,
205 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
206 .regen_max_retry = REGEN_MAX_RETRY,
207 .max_desync_factor = MAX_DESYNC_FACTOR,
208#endif
209 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800210 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800211 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800212#ifdef CONFIG_IPV6_ROUTER_PREF
213 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800214 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800215#ifdef CONFIG_IPV6_ROUTE_INFO
216 .accept_ra_rt_info_max_plen = 0,
217#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800218#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700219 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700220 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900221 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900222 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223};
224
225/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900228const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
229const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700231/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700232static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700233{
David S. Miller05297942008-07-08 23:01:27 -0700234 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700235}
236
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +0900237/* Check if a route is valid prefix route */
238static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
239{
240 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
241}
242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243static void addrconf_del_timer(struct inet6_ifaddr *ifp)
244{
245 if (del_timer(&ifp->timer))
246 __in6_ifa_put(ifp);
247}
248
249enum addrconf_timer_t
250{
251 AC_NONE,
252 AC_DAD,
253 AC_RS,
254};
255
256static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
257 enum addrconf_timer_t what,
258 unsigned long when)
259{
260 if (!del_timer(&ifp->timer))
261 in6_ifa_hold(ifp);
262
263 switch (what) {
264 case AC_DAD:
265 ifp->timer.function = addrconf_dad_timer;
266 break;
267 case AC_RS:
268 ifp->timer.function = addrconf_rs_timer;
269 break;
270 default:;
271 }
272 ifp->timer.expires = jiffies + when;
273 add_timer(&ifp->timer);
274}
275
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700276static int snmp6_alloc_dev(struct inet6_dev *idev)
277{
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700278 if (snmp_mib_init((void **)idev->stats.ipv6,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800279 sizeof(struct ipstats_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700280 goto err_ip;
281 if (snmp_mib_init((void **)idev->stats.icmpv6,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800282 sizeof(struct icmpv6_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700283 goto err_icmp;
David L Stevens14878f72007-09-16 16:52:35 -0700284 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800285 sizeof(struct icmpv6msg_mib)) < 0)
David L Stevens14878f72007-09-16 16:52:35 -0700286 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700287
288 return 0;
289
David L Stevens14878f72007-09-16 16:52:35 -0700290err_icmpmsg:
291 snmp_mib_free((void **)idev->stats.icmpv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700292err_icmp:
293 snmp_mib_free((void **)idev->stats.ipv6);
294err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700295 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700296}
297
Pavel Emelyanov16910b92007-10-17 21:23:43 -0700298static void snmp6_free_dev(struct inet6_dev *idev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700299{
David L Stevens14878f72007-09-16 16:52:35 -0700300 snmp_mib_free((void **)idev->stats.icmpv6msg);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700301 snmp_mib_free((void **)idev->stats.icmpv6);
302 snmp_mib_free((void **)idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700303}
304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305/* Nobody refers to this device, we may destroy it. */
306
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700307static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
308{
309 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
310 kfree(idev);
311}
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313void in6_dev_finish_destroy(struct inet6_dev *idev)
314{
315 struct net_device *dev = idev->dev;
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700316
317 WARN_ON(idev->addr_list != NULL);
318 WARN_ON(idev->mc_list != NULL);
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320#ifdef NET_REFCNT_DEBUG
321 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
322#endif
323 dev_put(dev);
324 if (!idev->dead) {
325 printk("Freeing alive inet6 device %p\n", idev);
326 return;
327 }
328 snmp6_free_dev(idev);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700329 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900332EXPORT_SYMBOL(in6_dev_finish_destroy);
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
335{
336 struct inet6_dev *ndev;
337
338 ASSERT_RTNL();
339
340 if (dev->mtu < IPV6_MIN_MTU)
341 return NULL;
342
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900343 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900345 if (ndev == NULL)
346 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Ingo Oeser322f74a2006-03-20 23:01:47 -0800348 rwlock_init(&ndev->lock);
349 ndev->dev = dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900350 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800351 ndev->cnf.mtu6 = dev->mtu;
352 ndev->cnf.sysctl = NULL;
353 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
354 if (ndev->nd_parms == NULL) {
355 kfree(ndev);
356 return NULL;
357 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700358 if (ndev->cnf.forwarding)
359 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800360 /* We refer to the device */
361 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Ingo Oeser322f74a2006-03-20 23:01:47 -0800363 if (snmp6_alloc_dev(ndev) < 0) {
364 ADBG((KERN_WARNING
365 "%s(): cannot allocate memory for statistics; dev=%s.\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800366 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800367 neigh_parms_release(&nd_tbl, ndev->nd_parms);
368 ndev->dead = 1;
369 in6_dev_finish_destroy(ndev);
370 return NULL;
371 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Ingo Oeser322f74a2006-03-20 23:01:47 -0800373 if (snmp6_register_dev(ndev) < 0) {
374 ADBG((KERN_WARNING
375 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800376 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800377 neigh_parms_release(&nd_tbl, ndev->nd_parms);
378 ndev->dead = 1;
379 in6_dev_finish_destroy(ndev);
380 return NULL;
381 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Ingo Oeser322f74a2006-03-20 23:01:47 -0800383 /* One reference from device. We must do this before
384 * we invoke __ipv6_regen_rndid().
385 */
386 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900388 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
389 ndev->cnf.accept_dad = -1;
390
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700391#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
392 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
393 printk(KERN_INFO
394 "%s: Disabled Multicast RS\n",
395 dev->name);
396 ndev->cnf.rtr_solicits = 0;
397 }
398#endif
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400#ifdef CONFIG_IPV6_PRIVACY
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800401 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800402 if ((dev->flags&IFF_LOOPBACK) ||
403 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700404 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700405 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700406 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800407 printk(KERN_INFO
408 "%s: Disabled Privacy Extensions\n",
409 dev->name);
410 ndev->cnf.use_tempaddr = -1;
411 } else {
412 in6_dev_hold(ndev);
413 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
Ingo Oeser322f74a2006-03-20 23:01:47 -0800415#endif
416
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700417 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700418 ndev->if_flags |= IF_READY;
419
Ingo Oeser322f74a2006-03-20 23:01:47 -0800420 ipv6_mc_init_dev(ndev);
421 ndev->tstamp = jiffies;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100422 addrconf_sysctl_register(ndev);
David L Stevens30c4cf52007-01-04 12:31:14 -0800423 /* protected by rtnl_lock */
424 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800425
426 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900427 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 return ndev;
430}
431
YOSHIFUJI Hideakicee89472008-04-13 23:21:16 -0700432static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433{
434 struct inet6_dev *idev;
435
436 ASSERT_RTNL();
437
438 if ((idev = __in6_dev_get(dev)) == NULL) {
439 if ((idev = ipv6_add_dev(dev)) == NULL)
440 return NULL;
441 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 if (dev->flags&IFF_UP)
444 ipv6_mc_up(idev);
445 return idev;
446}
447
448#ifdef CONFIG_SYSCTL
449static void dev_forward_change(struct inet6_dev *idev)
450{
451 struct net_device *dev;
452 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
454 if (!idev)
455 return;
456 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700457 if (idev->cnf.forwarding)
458 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 if (dev && (dev->flags & IFF_MULTICAST)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 if (idev->cnf.forwarding)
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900461 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 else
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900463 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 }
465 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800466 if (ifa->flags&IFA_F_TENTATIVE)
467 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 if (idev->cnf.forwarding)
469 addrconf_join_anycast(ifa);
470 else
471 addrconf_leave_anycast(ifa);
472 }
473}
474
475
Pavel Emelyanove1869322008-01-10 17:43:50 -0800476static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
478 struct net_device *dev;
479 struct inet6_dev *idev;
480
481 read_lock(&dev_base_lock);
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800482 for_each_netdev(net, dev) {
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700483 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 idev = __in6_dev_get(dev);
485 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800486 int changed = (!idev->cnf.forwarding) ^ (!newf);
487 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 if (changed)
489 dev_forward_change(idev);
490 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700491 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
493 read_unlock(&dev_base_lock);
494}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800495
496static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
497{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800498 struct net *net;
499
500 net = (struct net *)table->extra2;
Pavel Emelyanov441fc2a2008-01-10 17:43:22 -0800501 if (p == &net->ipv6.devconf_dflt->forwarding)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800502 return;
503
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700504 rtnl_lock();
Pavel Emelyanove1869322008-01-10 17:43:50 -0800505 if (p == &net->ipv6.devconf_all->forwarding) {
506 __s32 newf = net->ipv6.devconf_all->forwarding;
507 net->ipv6.devconf_dflt->forwarding = newf;
508 addrconf_forward_change(net, newf);
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800509 } else if ((!*p) ^ (!old))
510 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700511 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800512
513 if (*p)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800514 rt6_purge_dflt_routers(net);
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800515}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516#endif
517
518/* Nobody refers to this ifaddr, destroy it */
519
520void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
521{
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700522 WARN_ON(ifp->if_next != NULL);
523 WARN_ON(ifp->lst_next != NULL);
524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525#ifdef NET_REFCNT_DEBUG
526 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
527#endif
528
529 in6_dev_put(ifp->idev);
530
531 if (del_timer(&ifp->timer))
532 printk("Timer is still running, when freeing ifa=%p\n", ifp);
533
534 if (!ifp->dead) {
535 printk("Freeing alive inet6 address %p\n", ifp);
536 return;
537 }
538 dst_release(&ifp->rt->u.dst);
539
540 kfree(ifp);
541}
542
Brian Haleye55ffac2006-07-10 15:25:51 -0700543static void
544ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
545{
546 struct inet6_ifaddr *ifa, **ifap;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700547 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700548
549 /*
550 * Each device address list is sorted in order of scope -
551 * global before linklocal.
552 */
553 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
554 ifap = &ifa->if_next) {
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700555 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700556 break;
557 }
558
559 ifp->if_next = *ifap;
560 *ifap = ifp;
561}
562
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900563/*
564 * Hash function taken from net_alias.c
565 */
566static u8 ipv6_addr_hash(const struct in6_addr *addr)
567{
568 __u32 word;
569
570 /*
571 * We perform the hash function over the last 64 bits of the address
572 * This will include the IEEE address token on links that support it.
573 */
574
575 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
576 word ^= (word >> 16);
577 word ^= (word >> 8);
578
579 return ((word ^ (word >> 4)) & 0x0f);
580}
581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582/* On success it returns ifp with increased reference count */
583
584static struct inet6_ifaddr *
585ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -0700586 int scope, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
588 struct inet6_ifaddr *ifa = NULL;
589 struct rt6_info *rt;
590 int hash;
591 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900592 int addr_type = ipv6_addr_type(addr);
593
594 if (addr_type == IPV6_ADDR_ANY ||
595 addr_type & IPV6_ADDR_MULTICAST ||
596 (!(idev->dev->flags & IFF_LOOPBACK) &&
597 addr_type & IPV6_ADDR_LOOPBACK))
598 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700600 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 if (idev->dead) {
602 err = -ENODEV; /*XXX*/
603 goto out2;
604 }
605
606 write_lock(&addrconf_hash_lock);
607
608 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900609 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 ADBG(("ipv6_add_addr: already assigned\n"));
611 err = -EEXIST;
612 goto out;
613 }
614
Ingo Oeser322f74a2006-03-20 23:01:47 -0800615 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617 if (ifa == NULL) {
618 ADBG(("ipv6_add_addr: malloc failed\n"));
619 err = -ENOBUFS;
620 goto out;
621 }
622
623 rt = addrconf_dst_alloc(idev, addr, 0);
624 if (IS_ERR(rt)) {
625 err = PTR_ERR(rt);
626 goto out;
627 }
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 ipv6_addr_copy(&ifa->addr, addr);
630
631 spin_lock_init(&ifa->lock);
632 init_timer(&ifa->timer);
633 ifa->timer.data = (unsigned long) ifa;
634 ifa->scope = scope;
635 ifa->prefix_len = pfxlen;
636 ifa->flags = flags | IFA_F_TENTATIVE;
637 ifa->cstamp = ifa->tstamp = jiffies;
638
Keir Fraser57f5f542006-08-29 02:43:49 -0700639 ifa->rt = rt;
640
Neil Horman95c385b2007-04-25 17:08:10 -0700641 /*
642 * part one of RFC 4429, section 3.3
643 * We should not configure an address as
644 * optimistic if we do not yet know the link
645 * layer address of our nexhop router
646 */
647
648 if (rt->rt6i_nexthop == NULL)
649 ifa->flags &= ~IFA_F_OPTIMISTIC;
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 ifa->idev = idev;
652 in6_dev_hold(idev);
653 /* For caller */
654 in6_ifa_hold(ifa);
655
656 /* Add to big hash table */
657 hash = ipv6_addr_hash(addr);
658
659 ifa->lst_next = inet6_addr_lst[hash];
660 inet6_addr_lst[hash] = ifa;
661 in6_ifa_hold(ifa);
662 write_unlock(&addrconf_hash_lock);
663
664 write_lock(&idev->lock);
665 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700666 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668#ifdef CONFIG_IPV6_PRIVACY
669 if (ifa->flags&IFA_F_TEMPORARY) {
670 ifa->tmp_next = idev->tempaddr_list;
671 idev->tempaddr_list = ifa;
672 in6_ifa_hold(ifa);
673 }
674#endif
675
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 in6_ifa_hold(ifa);
677 write_unlock(&idev->lock);
678out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700679 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -0700681 if (likely(err == 0))
Alan Sterne041c682006-03-27 01:16:30 -0800682 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 else {
684 kfree(ifa);
685 ifa = ERR_PTR(err);
686 }
687
688 return ifa;
689out:
690 write_unlock(&addrconf_hash_lock);
691 goto out2;
692}
693
694/* This function wants to get referenced ifp and releases it before return */
695
696static void ipv6_del_addr(struct inet6_ifaddr *ifp)
697{
698 struct inet6_ifaddr *ifa, **ifap;
699 struct inet6_dev *idev = ifp->idev;
700 int hash;
701 int deleted = 0, onlink = 0;
702 unsigned long expires = jiffies;
703
704 hash = ipv6_addr_hash(&ifp->addr);
705
706 ifp->dead = 1;
707
708 write_lock_bh(&addrconf_hash_lock);
709 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
710 ifap = &ifa->lst_next) {
711 if (ifa == ifp) {
712 *ifap = ifa->lst_next;
713 __in6_ifa_put(ifp);
714 ifa->lst_next = NULL;
715 break;
716 }
717 }
718 write_unlock_bh(&addrconf_hash_lock);
719
720 write_lock_bh(&idev->lock);
721#ifdef CONFIG_IPV6_PRIVACY
722 if (ifp->flags&IFA_F_TEMPORARY) {
723 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
724 ifap = &ifa->tmp_next) {
725 if (ifa == ifp) {
726 *ifap = ifa->tmp_next;
727 if (ifp->ifpub) {
728 in6_ifa_put(ifp->ifpub);
729 ifp->ifpub = NULL;
730 }
731 __in6_ifa_put(ifp);
732 ifa->tmp_next = NULL;
733 break;
734 }
735 }
736 }
737#endif
738
Kristian Slavov1d142802005-12-21 18:47:24 -0800739 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 if (ifa == ifp) {
741 *ifap = ifa->if_next;
742 __in6_ifa_put(ifp);
743 ifa->if_next = NULL;
744 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
745 break;
746 deleted = 1;
Kristian Slavov1d142802005-12-21 18:47:24 -0800747 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 } else if (ifp->flags & IFA_F_PERMANENT) {
749 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
750 ifp->prefix_len)) {
751 if (ifa->flags & IFA_F_PERMANENT) {
752 onlink = 1;
753 if (deleted)
754 break;
755 } else {
756 unsigned long lifetime;
757
758 if (!onlink)
759 onlink = -1;
760
761 spin_lock(&ifa->lock);
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900762
763 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
764 /*
765 * Note: Because this address is
766 * not permanent, lifetime <
767 * LONG_MAX / HZ here.
768 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 if (time_before(expires,
770 ifa->tstamp + lifetime * HZ))
771 expires = ifa->tstamp + lifetime * HZ;
772 spin_unlock(&ifa->lock);
773 }
774 }
775 }
Kristian Slavov1d142802005-12-21 18:47:24 -0800776 ifap = &ifa->if_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 }
778 write_unlock_bh(&idev->lock);
779
Andrey Vaginb2238562008-07-08 15:13:31 -0700780 addrconf_del_timer(ifp);
781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 ipv6_ifa_notify(RTM_DELADDR, ifp);
783
Alan Sterne041c682006-03-27 01:16:30 -0800784 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 /*
787 * Purge or update corresponding prefix
788 *
789 * 1) we don't purge prefix here if address was not permanent.
790 * prefix is managed by its own lifetime.
791 * 2) if there're no addresses, delete prefix.
792 * 3) if there're still other permanent address(es),
793 * corresponding prefix is still permanent.
794 * 4) otherwise, update prefix lifetime to the
795 * longest valid lifetime among the corresponding
796 * addresses on the device.
797 * Note: subsequent RA will update lifetime.
798 *
799 * --yoshfuji
800 */
801 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
802 struct in6_addr prefix;
803 struct rt6_info *rt;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900804 struct net *net = dev_net(ifp->idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
Benjamin Thery6fda7352008-03-05 10:47:47 -0800806 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +0900808 if (rt && addrconf_is_prefix_route(rt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 if (onlink == 0) {
Thomas Grafe0a1ad732006-08-22 00:00:21 -0700810 ip6_del_rt(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 rt = NULL;
812 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
813 rt->rt6i_expires = expires;
814 rt->rt6i_flags |= RTF_EXPIRES;
815 }
816 }
817 dst_release(&rt->u.dst);
818 }
819
820 in6_ifa_put(ifp);
821}
822
823#ifdef CONFIG_IPV6_PRIVACY
824static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
825{
826 struct inet6_dev *idev = ifp->idev;
827 struct in6_addr addr, *tmpaddr;
828 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700829 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 int tmp_plen;
831 int ret = 0;
832 int max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -0700833 u32 addr_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
835 write_lock(&idev->lock);
836 if (ift) {
837 spin_lock_bh(&ift->lock);
838 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
839 spin_unlock_bh(&ift->lock);
840 tmpaddr = &addr;
841 } else {
842 tmpaddr = NULL;
843 }
844retry:
845 in6_dev_hold(idev);
846 if (idev->cnf.use_tempaddr <= 0) {
847 write_unlock(&idev->lock);
848 printk(KERN_INFO
849 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
850 in6_dev_put(idev);
851 ret = -1;
852 goto out;
853 }
854 spin_lock_bh(&ifp->lock);
855 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
856 idev->cnf.use_tempaddr = -1; /*XXX*/
857 spin_unlock_bh(&ifp->lock);
858 write_unlock(&idev->lock);
859 printk(KERN_WARNING
860 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
861 in6_dev_put(idev);
862 ret = -1;
863 goto out;
864 }
865 in6_ifa_hold(ifp);
866 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
867 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
868 spin_unlock_bh(&ifp->lock);
869 write_unlock(&idev->lock);
870 printk(KERN_WARNING
871 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
872 in6_ifa_put(ifp);
873 in6_dev_put(idev);
874 ret = -1;
875 goto out;
876 }
877 memcpy(&addr.s6_addr[8], idev->rndid, 8);
878 tmp_valid_lft = min_t(__u32,
879 ifp->valid_lft,
880 idev->cnf.temp_valid_lft);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900881 tmp_prefered_lft = min_t(__u32,
882 ifp->prefered_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 idev->cnf.temp_prefered_lft - desync_factor / HZ);
884 tmp_plen = ifp->prefix_len;
885 max_addresses = idev->cnf.max_addresses;
886 tmp_cstamp = ifp->cstamp;
887 tmp_tstamp = ifp->tstamp;
888 spin_unlock_bh(&ifp->lock);
889
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700890 regen_advance = idev->cnf.regen_max_retry *
891 idev->cnf.dad_transmits *
892 idev->nd_parms->retrans_time / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 write_unlock(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -0700894
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700895 /* A temporary address is created only if this calculated Preferred
896 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
897 * an implementation must not create a temporary address with a zero
898 * Preferred Lifetime.
899 */
900 if (tmp_prefered_lft <= regen_advance) {
901 in6_ifa_put(ifp);
902 in6_dev_put(idev);
903 ret = -1;
904 goto out;
905 }
906
Neil Horman95c385b2007-04-25 17:08:10 -0700907 addr_flags = IFA_F_TEMPORARY;
908 /* set in addrconf_prefix_rcv() */
909 if (ifp->flags & IFA_F_OPTIMISTIC)
910 addr_flags |= IFA_F_OPTIMISTIC;
911
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 ift = !max_addresses ||
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900913 ipv6_count_addresses(idev) < max_addresses ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 ipv6_add_addr(idev, &addr, tmp_plen,
Neil Horman95c385b2007-04-25 17:08:10 -0700915 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
916 addr_flags) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 if (!ift || IS_ERR(ift)) {
918 in6_ifa_put(ifp);
919 in6_dev_put(idev);
920 printk(KERN_INFO
921 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
922 tmpaddr = &addr;
923 write_lock(&idev->lock);
924 goto retry;
925 }
926
927 spin_lock_bh(&ift->lock);
928 ift->ifpub = ifp;
929 ift->valid_lft = tmp_valid_lft;
930 ift->prefered_lft = tmp_prefered_lft;
931 ift->cstamp = tmp_cstamp;
932 ift->tstamp = tmp_tstamp;
933 spin_unlock_bh(&ift->lock);
934
935 addrconf_dad_start(ift, 0);
936 in6_ifa_put(ift);
937 in6_dev_put(idev);
938out:
939 return ret;
940}
941#endif
942
943/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800944 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900946enum {
947 IPV6_SADDR_RULE_INIT = 0,
948 IPV6_SADDR_RULE_LOCAL,
949 IPV6_SADDR_RULE_SCOPE,
950 IPV6_SADDR_RULE_PREFERRED,
951#ifdef CONFIG_IPV6_MIP6
952 IPV6_SADDR_RULE_HOA,
953#endif
954 IPV6_SADDR_RULE_OIF,
955 IPV6_SADDR_RULE_LABEL,
956#ifdef CONFIG_IPV6_PRIVACY
957 IPV6_SADDR_RULE_PRIVACY,
958#endif
959 IPV6_SADDR_RULE_ORCHID,
960 IPV6_SADDR_RULE_PREFIX,
961 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800962};
963
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900964struct ipv6_saddr_score {
965 int rule;
966 int addr_type;
967 struct inet6_ifaddr *ifa;
968 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
969 int scopedist;
970 int matchlen;
971};
972
973struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900974 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900975 int ifindex;
976 int scope;
977 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900978 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900979};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800980
Dave Jonesb6f99a22007-03-22 12:27:49 -0700981static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982{
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800983 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
984 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
985 return 1;
986 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987}
988
Benjamin Thery3de23252008-05-28 14:51:24 +0200989static int ipv6_get_saddr_eval(struct net *net,
990 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900991 struct ipv6_saddr_dst *dst,
992 int i)
993{
994 int ret;
995
996 if (i <= score->rule) {
997 switch (i) {
998 case IPV6_SADDR_RULE_SCOPE:
999 ret = score->scopedist;
1000 break;
1001 case IPV6_SADDR_RULE_PREFIX:
1002 ret = score->matchlen;
1003 break;
1004 default:
1005 ret = !!test_bit(i, score->scorebits);
1006 }
1007 goto out;
1008 }
1009
1010 switch (i) {
1011 case IPV6_SADDR_RULE_INIT:
1012 /* Rule 0: remember if hiscore is not ready yet */
1013 ret = !!score->ifa;
1014 break;
1015 case IPV6_SADDR_RULE_LOCAL:
1016 /* Rule 1: Prefer same address */
1017 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1018 break;
1019 case IPV6_SADDR_RULE_SCOPE:
1020 /* Rule 2: Prefer appropriate scope
1021 *
1022 * ret
1023 * ^
1024 * -1 | d 15
1025 * ---+--+-+---> scope
1026 * |
1027 * | d is scope of the destination.
1028 * B-d | \
1029 * | \ <- smaller scope is better if
1030 * B-15 | \ if scope is enough for destinaion.
1031 * | ret = B - scope (-1 <= scope >= d <= 15).
1032 * d-C-1 | /
1033 * |/ <- greater is better
1034 * -C / if scope is not enough for destination.
1035 * /| ret = scope - C (-1 <= d < scope <= 15).
1036 *
1037 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1038 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1039 * Assume B = 0 and we get C > 29.
1040 */
1041 ret = __ipv6_addr_src_scope(score->addr_type);
1042 if (ret >= dst->scope)
1043 ret = -ret;
1044 else
1045 ret -= 128; /* 30 is enough */
1046 score->scopedist = ret;
1047 break;
1048 case IPV6_SADDR_RULE_PREFERRED:
1049 /* Rule 3: Avoid deprecated and optimistic addresses */
1050 ret = ipv6_saddr_preferred(score->addr_type) ||
1051 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1052 break;
1053#ifdef CONFIG_IPV6_MIP6
1054 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001055 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001056 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001057 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1058 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001059 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001060 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001061#endif
1062 case IPV6_SADDR_RULE_OIF:
1063 /* Rule 5: Prefer outgoing interface */
1064 ret = (!dst->ifindex ||
1065 dst->ifindex == score->ifa->idev->dev->ifindex);
1066 break;
1067 case IPV6_SADDR_RULE_LABEL:
1068 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001069 ret = ipv6_addr_label(net,
1070 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001071 score->ifa->idev->dev->ifindex) == dst->label;
1072 break;
1073#ifdef CONFIG_IPV6_PRIVACY
1074 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001075 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001076 /* Rule 7: Prefer public address
1077 * Note: prefer temprary address if use_tempaddr >= 2
1078 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001079 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1080 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1081 score->ifa->idev->cnf.use_tempaddr >= 2;
1082 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001083 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001084 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001085#endif
1086 case IPV6_SADDR_RULE_ORCHID:
1087 /* Rule 8-: Prefer ORCHID vs ORCHID or
1088 * non-ORCHID vs non-ORCHID
1089 */
1090 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1091 ipv6_addr_orchid(dst->addr));
1092 break;
1093 case IPV6_SADDR_RULE_PREFIX:
1094 /* Rule 8: Use longest matching prefix */
1095 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1096 dst->addr);
1097 break;
1098 default:
1099 ret = 0;
1100 }
1101
1102 if (ret)
1103 __set_bit(i, score->scorebits);
1104 score->rule = i;
1105out:
1106 return ret;
1107}
1108
Brian Haley191cd582008-08-14 15:33:21 -07001109int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001110 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001111 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112{
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001113 struct ipv6_saddr_score scores[2],
1114 *score = &scores[0], *hiscore = &scores[1];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001115 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001116 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001117 int dst_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001119 dst_type = __ipv6_addr_type(daddr);
1120 dst.addr = daddr;
1121 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1122 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001123 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001124 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001125
1126 hiscore->rule = -1;
1127 hiscore->ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129 read_lock(&dev_base_lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001130 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001131
Benjamin Thery6fda7352008-03-05 10:47:47 -08001132 for_each_netdev(net, dev) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001133 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001134
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001135 /* Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001136 * - multicast and link-local destination address,
1137 * the set of candidate source address MUST only
1138 * include addresses assigned to interfaces
1139 * belonging to the same link as the outgoing
1140 * interface.
1141 * (- For site-local destination addresses, the
1142 * set of candidate source addresses MUST only
1143 * include addresses assigned to interfaces
1144 * belonging to the same site as the outgoing
1145 * interface.)
1146 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001147 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1148 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1149 dst.ifindex && dev->ifindex != dst.ifindex)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001150 continue;
1151
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 idev = __in6_dev_get(dev);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001153 if (!idev)
1154 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001156 read_lock_bh(&idev->lock);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001157 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1158 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001160 /*
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001161 * - Tentative Address (RFC2462 section 5.4)
1162 * - A tentative address is not considered
1163 * "assigned to an interface" in the traditional
Neil Horman95c385b2007-04-25 17:08:10 -07001164 * sense, unless it is also flagged as optimistic.
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001165 * - Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001166 * - In any case, anycast addresses, multicast
1167 * addresses, and the unspecified address MUST
1168 * NOT be included in a candidate set.
1169 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001170 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1171 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001172 continue;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001173
1174 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1175
1176 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1177 score->addr_type & IPV6_ADDR_MULTICAST)) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001178 LIMIT_NETDEBUG(KERN_DEBUG
Joe Perches3b6d821c2007-11-19 23:47:25 -08001179 "ADDRCONF: unspecified / multicast address "
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001180 "assigned as unicast address on %s",
1181 dev->name);
1182 continue;
1183 }
1184
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001185 score->rule = -1;
1186 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001187
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001188 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1189 int minihiscore, miniscore;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001190
Benjamin Thery3de23252008-05-28 14:51:24 +02001191 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1192 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001193
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001194 if (minihiscore > miniscore) {
1195 if (i == IPV6_SADDR_RULE_SCOPE &&
1196 score->scopedist > 0) {
1197 /*
1198 * special case:
1199 * each remaining entry
1200 * has too small (not enough)
1201 * scope, because ifa entries
1202 * are sorted by their scope
1203 * values.
1204 */
1205 goto try_nextdev;
1206 }
1207 break;
1208 } else if (minihiscore < miniscore) {
1209 struct ipv6_saddr_score *tmp;
1210
1211 if (hiscore->ifa)
1212 in6_ifa_put(hiscore->ifa);
1213
1214 in6_ifa_hold(score->ifa);
1215
1216 tmp = hiscore;
1217 hiscore = score;
1218 score = tmp;
1219
1220 /* restore our iterator */
1221 score->ifa = hiscore->ifa;
1222
1223 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 }
1225 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001226 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001227try_nextdev:
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001228 read_unlock_bh(&idev->lock);
1229 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001230 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 read_unlock(&dev_base_lock);
1232
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001233 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001234 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001235
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001236 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1237 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001238 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239}
1240
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001241EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
Neil Horman95c385b2007-04-25 17:08:10 -07001243int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1244 unsigned char banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
1246 struct inet6_dev *idev;
1247 int err = -EADDRNOTAVAIL;
1248
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001249 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 if ((idev = __in6_dev_get(dev)) != NULL) {
1251 struct inet6_ifaddr *ifp;
1252
1253 read_lock_bh(&idev->lock);
1254 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
Neil Horman95c385b2007-04-25 17:08:10 -07001255 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 ipv6_addr_copy(addr, &ifp->addr);
1257 err = 0;
1258 break;
1259 }
1260 }
1261 read_unlock_bh(&idev->lock);
1262 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001263 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 return err;
1265}
1266
1267static int ipv6_count_addresses(struct inet6_dev *idev)
1268{
1269 int cnt = 0;
1270 struct inet6_ifaddr *ifp;
1271
1272 read_lock_bh(&idev->lock);
1273 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1274 cnt++;
1275 read_unlock_bh(&idev->lock);
1276 return cnt;
1277}
1278
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001279int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1280 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281{
1282 struct inet6_ifaddr * ifp;
1283 u8 hash = ipv6_addr_hash(addr);
1284
1285 read_lock_bh(&addrconf_hash_lock);
1286 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001287 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001288 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 if (ipv6_addr_equal(&ifp->addr, addr) &&
1290 !(ifp->flags&IFA_F_TENTATIVE)) {
1291 if (dev == NULL || ifp->idev->dev == dev ||
1292 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1293 break;
1294 }
1295 }
1296 read_unlock_bh(&addrconf_hash_lock);
1297 return ifp != NULL;
1298}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001299EXPORT_SYMBOL(ipv6_chk_addr);
1300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301static
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001302int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1303 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304{
1305 struct inet6_ifaddr * ifp;
1306 u8 hash = ipv6_addr_hash(addr);
1307
1308 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001309 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001310 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 if (ipv6_addr_equal(&ifp->addr, addr)) {
1312 if (dev == NULL || ifp->idev->dev == dev)
1313 break;
1314 }
1315 }
1316 return ifp != NULL;
1317}
1318
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001319int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1320{
1321 struct inet6_dev *idev;
1322 struct inet6_ifaddr *ifa;
1323 int onlink;
1324
1325 onlink = 0;
1326 rcu_read_lock();
1327 idev = __in6_dev_get(dev);
1328 if (idev) {
1329 read_lock_bh(&idev->lock);
1330 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1331 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1332 ifa->prefix_len);
1333 if (onlink)
1334 break;
1335 }
1336 read_unlock_bh(&idev->lock);
1337 }
1338 rcu_read_unlock();
1339 return onlink;
1340}
1341
1342EXPORT_SYMBOL(ipv6_chk_prefix);
1343
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001344struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001345 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346{
1347 struct inet6_ifaddr * ifp;
1348 u8 hash = ipv6_addr_hash(addr);
1349
1350 read_lock_bh(&addrconf_hash_lock);
1351 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001352 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001353 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 if (ipv6_addr_equal(&ifp->addr, addr)) {
1355 if (dev == NULL || ifp->idev->dev == dev ||
1356 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1357 in6_ifa_hold(ifp);
1358 break;
1359 }
1360 }
1361 }
1362 read_unlock_bh(&addrconf_hash_lock);
1363
1364 return ifp;
1365}
1366
1367int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1368{
1369 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -08001370 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
Al Viro82103232006-09-27 18:44:10 -07001371 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1372 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 int sk_ipv6only = ipv6_only_sock(sk);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -07001374 int sk2_ipv6only = inet_v6_ipv6only(sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1376 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1377
1378 if (!sk2_rcv_saddr && !sk_ipv6only)
1379 return 1;
1380
1381 if (addr_type2 == IPV6_ADDR_ANY &&
1382 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1383 return 1;
1384
1385 if (addr_type == IPV6_ADDR_ANY &&
1386 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1387 return 1;
1388
1389 if (sk2_rcv_saddr6 &&
1390 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1391 return 1;
1392
1393 if (addr_type == IPV6_ADDR_MAPPED &&
1394 !sk2_ipv6only &&
1395 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1396 return 1;
1397
1398 return 0;
1399}
1400
1401/* Gets referenced address, destroys ifaddr */
1402
Adrian Bunk9f5336e2006-01-07 13:24:25 -08001403static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 if (ifp->flags&IFA_F_PERMANENT) {
1406 spin_lock_bh(&ifp->lock);
1407 addrconf_del_timer(ifp);
1408 ifp->flags |= IFA_F_TENTATIVE;
1409 spin_unlock_bh(&ifp->lock);
1410 in6_ifa_put(ifp);
1411#ifdef CONFIG_IPV6_PRIVACY
1412 } else if (ifp->flags&IFA_F_TEMPORARY) {
1413 struct inet6_ifaddr *ifpub;
1414 spin_lock_bh(&ifp->lock);
1415 ifpub = ifp->ifpub;
1416 if (ifpub) {
1417 in6_ifa_hold(ifpub);
1418 spin_unlock_bh(&ifp->lock);
1419 ipv6_create_tempaddr(ifpub, ifp);
1420 in6_ifa_put(ifpub);
1421 } else {
1422 spin_unlock_bh(&ifp->lock);
1423 }
1424 ipv6_del_addr(ifp);
1425#endif
1426 } else
1427 ipv6_del_addr(ifp);
1428}
1429
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001430void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1431{
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001432 struct inet6_dev *idev = ifp->idev;
1433 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1434 struct in6_addr addr;
1435
1436 addr.s6_addr32[0] = htonl(0xfe800000);
1437 addr.s6_addr32[1] = 0;
1438
1439 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1440 ipv6_addr_equal(&ifp->addr, &addr)) {
1441 /* DAD failed for link-local based on MAC address */
1442 idev->cnf.disable_ipv6 = 1;
1443 }
1444 }
1445
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001446 if (net_ratelimit())
1447 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1448 addrconf_dad_stop(ifp);
1449}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
1451/* Join to solicited addr multicast group. */
1452
1453void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1454{
1455 struct in6_addr maddr;
1456
1457 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1458 return;
1459
1460 addrconf_addr_solict_mult(addr, &maddr);
1461 ipv6_dev_mc_inc(dev, &maddr);
1462}
1463
1464void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1465{
1466 struct in6_addr maddr;
1467
1468 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1469 return;
1470
1471 addrconf_addr_solict_mult(addr, &maddr);
1472 __ipv6_dev_mc_dec(idev, &maddr);
1473}
1474
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001475static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476{
1477 struct in6_addr addr;
1478 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1479 if (ipv6_addr_any(&addr))
1480 return;
1481 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1482}
1483
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001484static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485{
1486 struct in6_addr addr;
1487 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1488 if (ipv6_addr_any(&addr))
1489 return;
1490 __ipv6_dev_ac_dec(ifp->idev, &addr);
1491}
1492
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001493static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1494{
1495 if (dev->addr_len != ETH_ALEN)
1496 return -1;
1497 memcpy(eui, dev->dev_addr, 3);
1498 memcpy(eui + 5, dev->dev_addr + 3, 3);
1499
1500 /*
1501 * The zSeries OSA network cards can be shared among various
1502 * OS instances, but the OSA cards have only one MAC address.
1503 * This leads to duplicate address conflicts in conjunction
1504 * with IPv6 if more than one instance uses the same card.
1505 *
1506 * The driver for these cards can deliver a unique 16-bit
1507 * identifier for each instance sharing the same card. It is
1508 * placed instead of 0xFFFE in the interface identifier. The
1509 * "u" bit of the interface identifier is not inverted in this
1510 * case. Hence the resulting interface identifier has local
1511 * scope according to RFC2373.
1512 */
1513 if (dev->dev_id) {
1514 eui[3] = (dev->dev_id >> 8) & 0xFF;
1515 eui[4] = dev->dev_id & 0xFF;
1516 } else {
1517 eui[3] = 0xFF;
1518 eui[4] = 0xFE;
1519 eui[0] ^= 2;
1520 }
1521 return 0;
1522}
1523
1524static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1525{
1526 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1527 if (dev->addr_len != ARCNET_ALEN)
1528 return -1;
1529 memset(eui, 0, 7);
1530 eui[7] = *(u8*)dev->dev_addr;
1531 return 0;
1532}
1533
1534static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1535{
1536 if (dev->addr_len != INFINIBAND_ALEN)
1537 return -1;
1538 memcpy(eui, dev->dev_addr + 12, 8);
1539 eui[0] |= 2;
1540 return 0;
1541}
1542
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001543int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1544{
1545 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1546 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1547 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1548 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1549 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1550 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1551 eui[1] = 0;
1552 eui[2] = 0x5E;
1553 eui[3] = 0xFE;
1554 memcpy(eui + 4, &addr, 4);
1555 return 0;
1556}
1557EXPORT_SYMBOL(__ipv6_isatap_ifid);
1558
1559static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1560{
1561 if (dev->priv_flags & IFF_ISATAP)
1562 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1563 return -1;
1564}
1565
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1567{
1568 switch (dev->type) {
1569 case ARPHRD_ETHER:
1570 case ARPHRD_FDDI:
1571 case ARPHRD_IEEE802_TR:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001572 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001574 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001576 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001577 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001578 return addrconf_ifid_sit(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 }
1580 return -1;
1581}
1582
1583static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1584{
1585 int err = -1;
1586 struct inet6_ifaddr *ifp;
1587
1588 read_lock_bh(&idev->lock);
1589 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1590 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1591 memcpy(eui, ifp->addr.s6_addr+8, 8);
1592 err = 0;
1593 break;
1594 }
1595 }
1596 read_unlock_bh(&idev->lock);
1597 return err;
1598}
1599
1600#ifdef CONFIG_IPV6_PRIVACY
1601/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1602static int __ipv6_regen_rndid(struct inet6_dev *idev)
1603{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08001605 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
1608 /*
1609 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1610 * check if generated address is not inappropriate
1611 *
1612 * - Reserved subnet anycast (RFC 2526)
1613 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001614 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 * 00-00-5E-FE-xx-xx-xx-xx
1616 * - value 0
1617 * - XXX: already assigned to an address on the device
1618 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001619 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1621 (idev->rndid[7]&0x80))
1622 goto regen;
1623 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1624 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1625 goto regen;
1626 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1627 goto regen;
1628 }
1629
1630 return 0;
1631}
1632
1633static void ipv6_regen_rndid(unsigned long data)
1634{
1635 struct inet6_dev *idev = (struct inet6_dev *) data;
1636 unsigned long expires;
1637
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001638 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 write_lock_bh(&idev->lock);
1640
1641 if (idev->dead)
1642 goto out;
1643
1644 if (__ipv6_regen_rndid(idev) < 0)
1645 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001646
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001648 idev->cnf.temp_prefered_lft * HZ -
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1650 if (time_before(expires, jiffies)) {
1651 printk(KERN_WARNING
1652 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1653 idev->dev->name);
1654 goto out;
1655 }
1656
1657 if (!mod_timer(&idev->regen_timer, expires))
1658 in6_dev_hold(idev);
1659
1660out:
1661 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001662 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 in6_dev_put(idev);
1664}
1665
1666static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1667 int ret = 0;
1668
1669 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1670 ret = __ipv6_regen_rndid(idev);
1671 return ret;
1672}
1673#endif
1674
1675/*
1676 * Add prefix route.
1677 */
1678
1679static void
1680addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07001681 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682{
Thomas Graf86872cb2006-08-22 00:01:08 -07001683 struct fib6_config cfg = {
1684 .fc_table = RT6_TABLE_PREFIX,
1685 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1686 .fc_ifindex = dev->ifindex,
1687 .fc_expires = expires,
1688 .fc_dst_len = plen,
1689 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001690 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07001691 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07001692 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693
Thomas Graf86872cb2006-08-22 00:01:08 -07001694 ipv6_addr_copy(&cfg.fc_dst, pfx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695
1696 /* Prevent useless cloning on PtP SIT.
1697 This thing is done here expecting that the whole
1698 class of non-broadcast devices need not cloning.
1699 */
Joerg Roedel0be669b2006-10-10 14:49:53 -07001700#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Thomas Graf86872cb2006-08-22 00:01:08 -07001701 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1702 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07001703#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Thomas Graf86872cb2006-08-22 00:01:08 -07001705 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706}
1707
1708/* Create "default" multicast route to the interface */
1709
1710static void addrconf_add_mroute(struct net_device *dev)
1711{
Thomas Graf86872cb2006-08-22 00:01:08 -07001712 struct fib6_config cfg = {
1713 .fc_table = RT6_TABLE_LOCAL,
1714 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1715 .fc_ifindex = dev->ifindex,
1716 .fc_dst_len = 8,
1717 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001718 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001719 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720
Thomas Graf86872cb2006-08-22 00:01:08 -07001721 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1722
1723 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724}
1725
Joerg Roedel0be669b2006-10-10 14:49:53 -07001726#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727static void sit_route_add(struct net_device *dev)
1728{
Thomas Graf86872cb2006-08-22 00:01:08 -07001729 struct fib6_config cfg = {
1730 .fc_table = RT6_TABLE_MAIN,
1731 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1732 .fc_ifindex = dev->ifindex,
1733 .fc_dst_len = 96,
1734 .fc_flags = RTF_UP | RTF_NONEXTHOP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001735 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001736 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
1738 /* prefix length - 96 bits "::d.d.d.d" */
Thomas Graf86872cb2006-08-22 00:01:08 -07001739 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740}
Joerg Roedel0be669b2006-10-10 14:49:53 -07001741#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742
1743static void addrconf_add_lroute(struct net_device *dev)
1744{
1745 struct in6_addr addr;
1746
1747 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1748 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1749}
1750
1751static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1752{
1753 struct inet6_dev *idev;
1754
1755 ASSERT_RTNL();
1756
1757 if ((idev = ipv6_find_idev(dev)) == NULL)
1758 return NULL;
1759
1760 /* Add default multicast route */
1761 addrconf_add_mroute(dev);
1762
1763 /* Add link local route */
1764 addrconf_add_lroute(dev);
1765 return idev;
1766}
1767
1768void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1769{
1770 struct prefix_info *pinfo;
1771 __u32 valid_lft;
1772 __u32 prefered_lft;
1773 int addr_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 struct inet6_dev *in6_dev;
1775
1776 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001777
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 if (len < sizeof(struct prefix_info)) {
1779 ADBG(("addrconf: prefix option too short\n"));
1780 return;
1781 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001782
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 /*
1784 * Validation checks ([ADDRCONF], page 19)
1785 */
1786
1787 addr_type = ipv6_addr_type(&pinfo->prefix);
1788
1789 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1790 return;
1791
1792 valid_lft = ntohl(pinfo->valid);
1793 prefered_lft = ntohl(pinfo->prefered);
1794
1795 if (prefered_lft > valid_lft) {
1796 if (net_ratelimit())
1797 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1798 return;
1799 }
1800
1801 in6_dev = in6_dev_get(dev);
1802
1803 if (in6_dev == NULL) {
1804 if (net_ratelimit())
1805 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1806 return;
1807 }
1808
1809 /*
1810 * Two things going on here:
1811 * 1) Add routes for on-link prefixes
1812 * 2) Configure prefixes with the auto flag set
1813 */
1814
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001815 if (pinfo->onlink) {
1816 struct rt6_info *rt;
1817 unsigned long rt_expires;
1818
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001819 /* Avoid arithmetic overflow. Really, we could
1820 * save rt_expires in seconds, likely valid_lft,
1821 * but it would require division in fib gc, that it
1822 * not good.
1823 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001824 if (HZ > USER_HZ)
1825 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1826 else
1827 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08001828
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001829 if (addrconf_finite_timeout(rt_expires))
1830 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001832 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
Benjamin Thery6fda7352008-03-05 10:47:47 -08001833 dev->ifindex, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +09001835 if (rt && addrconf_is_prefix_route(rt)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001836 /* Autoconf prefix route */
1837 if (valid_lft == 0) {
1838 ip6_del_rt(rt);
1839 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001840 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001841 /* not infinity */
1842 rt->rt6i_expires = jiffies + rt_expires;
1843 rt->rt6i_flags |= RTF_EXPIRES;
1844 } else {
1845 rt->rt6i_flags &= ~RTF_EXPIRES;
1846 rt->rt6i_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 }
1848 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001849 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001850 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1851 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001852 /* not infinity */
1853 flags |= RTF_EXPIRES;
1854 expires = jiffies_to_clock_t(rt_expires);
1855 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001857 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 }
1859 if (rt)
1860 dst_release(&rt->u.dst);
1861 }
1862
1863 /* Try to figure out our local address for this prefix */
1864
1865 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1866 struct inet6_ifaddr * ifp;
1867 struct in6_addr addr;
1868 int create = 0, update_lft = 0;
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001869 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870
1871 if (pinfo->prefix_len == 64) {
1872 memcpy(&addr, &pinfo->prefix, 8);
1873 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1874 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1875 in6_dev_put(in6_dev);
1876 return;
1877 }
1878 goto ok;
1879 }
1880 if (net_ratelimit())
1881 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1882 pinfo->prefix_len);
1883 in6_dev_put(in6_dev);
1884 return;
1885
1886ok:
1887
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001888 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889
1890 if (ifp == NULL && valid_lft) {
1891 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07001892 u32 addr_flags = 0;
1893
1894#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1895 if (in6_dev->cnf.optimistic_dad &&
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001896 !net->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07001897 addr_flags = IFA_F_OPTIMISTIC;
1898#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
1900 /* Do not allow to create too much of autoconfigured
1901 * addresses; this would be too easy way to crash kernel.
1902 */
1903 if (!max_addresses ||
1904 ipv6_count_addresses(in6_dev) < max_addresses)
1905 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07001906 addr_type&IPV6_ADDR_SCOPE_MASK,
1907 addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
1909 if (!ifp || IS_ERR(ifp)) {
1910 in6_dev_put(in6_dev);
1911 return;
1912 }
1913
1914 update_lft = create = 1;
1915 ifp->cstamp = jiffies;
1916 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1917 }
1918
1919 if (ifp) {
1920 int flags;
1921 unsigned long now;
1922#ifdef CONFIG_IPV6_PRIVACY
1923 struct inet6_ifaddr *ift;
1924#endif
1925 u32 stored_lft;
1926
1927 /* update lifetime (RFC2462 5.5.3 e) */
1928 spin_lock(&ifp->lock);
1929 now = jiffies;
1930 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1931 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1932 else
1933 stored_lft = 0;
1934 if (!update_lft && stored_lft) {
1935 if (valid_lft > MIN_VALID_LIFETIME ||
1936 valid_lft > stored_lft)
1937 update_lft = 1;
1938 else if (stored_lft <= MIN_VALID_LIFETIME) {
1939 /* valid_lft <= stored_lft is always true */
1940 /* XXX: IPsec */
1941 update_lft = 0;
1942 } else {
1943 valid_lft = MIN_VALID_LIFETIME;
1944 if (valid_lft < prefered_lft)
1945 prefered_lft = valid_lft;
1946 update_lft = 1;
1947 }
1948 }
1949
1950 if (update_lft) {
1951 ifp->valid_lft = valid_lft;
1952 ifp->prefered_lft = prefered_lft;
1953 ifp->tstamp = now;
1954 flags = ifp->flags;
1955 ifp->flags &= ~IFA_F_DEPRECATED;
1956 spin_unlock(&ifp->lock);
1957
1958 if (!(flags&IFA_F_TENTATIVE))
1959 ipv6_ifa_notify(0, ifp);
1960 } else
1961 spin_unlock(&ifp->lock);
1962
1963#ifdef CONFIG_IPV6_PRIVACY
1964 read_lock_bh(&in6_dev->lock);
1965 /* update all temporary addresses in the list */
1966 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1967 /*
1968 * When adjusting the lifetimes of an existing
1969 * temporary address, only lower the lifetimes.
1970 * Implementations must not increase the
1971 * lifetimes of an existing temporary address
1972 * when processing a Prefix Information Option.
1973 */
Benoit Boissinotc6fbfac2008-04-02 00:00:58 -07001974 if (ifp != ift->ifpub)
1975 continue;
1976
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 spin_lock(&ift->lock);
1978 flags = ift->flags;
1979 if (ift->valid_lft > valid_lft &&
1980 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1981 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1982 if (ift->prefered_lft > prefered_lft &&
1983 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1984 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1985 spin_unlock(&ift->lock);
1986 if (!(flags&IFA_F_TENTATIVE))
1987 ipv6_ifa_notify(0, ift);
1988 }
1989
1990 if (create && in6_dev->cnf.use_tempaddr > 0) {
1991 /*
1992 * When a new public address is created as described in [ADDRCONF],
1993 * also create a new temporary address.
1994 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001995 read_unlock_bh(&in6_dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 ipv6_create_tempaddr(ifp, NULL);
1997 } else {
1998 read_unlock_bh(&in6_dev->lock);
1999 }
2000#endif
2001 in6_ifa_put(ifp);
2002 addrconf_verify(0);
2003 }
2004 }
2005 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2006 in6_dev_put(in6_dev);
2007}
2008
2009/*
2010 * Set destination address.
2011 * Special case for SIT interfaces where we create a new "virtual"
2012 * device.
2013 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002014int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015{
2016 struct in6_ifreq ireq;
2017 struct net_device *dev;
2018 int err = -EINVAL;
2019
2020 rtnl_lock();
2021
2022 err = -EFAULT;
2023 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2024 goto err_exit;
2025
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002026 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027
2028 err = -ENODEV;
2029 if (dev == NULL)
2030 goto err_exit;
2031
Joerg Roedel0be669b2006-10-10 14:49:53 -07002032#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 if (dev->type == ARPHRD_SIT) {
2034 struct ifreq ifr;
2035 mm_segment_t oldfs;
2036 struct ip_tunnel_parm p;
2037
2038 err = -EADDRNOTAVAIL;
2039 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2040 goto err_exit;
2041
2042 memset(&p, 0, sizeof(p));
2043 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2044 p.iph.saddr = 0;
2045 p.iph.version = 4;
2046 p.iph.ihl = 5;
2047 p.iph.protocol = IPPROTO_IPV6;
2048 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002049 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050
2051 oldfs = get_fs(); set_fs(KERNEL_DS);
2052 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2053 set_fs(oldfs);
2054
2055 if (err == 0) {
2056 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002057 dev = __dev_get_by_name(net, p.name);
2058 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 goto err_exit;
2060 err = dev_open(dev);
2061 }
2062 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002063#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
2065err_exit:
2066 rtnl_unlock();
2067 return err;
2068}
2069
2070/*
2071 * Manual configuration of address on an interface
2072 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002073static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002074 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002075 __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076{
2077 struct inet6_ifaddr *ifp;
2078 struct inet6_dev *idev;
2079 struct net_device *dev;
2080 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002081 u32 flags;
2082 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002083 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002086
Thomas Graf24ef0da2008-05-28 16:54:22 +02002087 if (plen > 128)
2088 return -EINVAL;
2089
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002090 /* check the lifetime */
2091 if (!valid_lft || prefered_lft > valid_lft)
2092 return -EINVAL;
2093
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002094 dev = __dev_get_by_index(net, ifindex);
2095 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002097
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 if ((idev = addrconf_add_dev(dev)) == NULL)
2099 return -ENOBUFS;
2100
2101 scope = ipv6_addr_scope(pfx);
2102
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002103 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2104 if (addrconf_finite_timeout(timeout)) {
2105 expires = jiffies_to_clock_t(timeout * HZ);
2106 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002107 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002108 } else {
2109 expires = 0;
2110 flags = 0;
2111 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002112 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002113
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002114 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2115 if (addrconf_finite_timeout(timeout)) {
2116 if (timeout == 0)
2117 ifa_flags |= IFA_F_DEPRECATED;
2118 prefered_lft = timeout;
2119 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002120
2121 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 if (!IS_ERR(ifp)) {
Herbert Xu06aebfb2006-08-09 16:52:04 -07002124 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002125 ifp->valid_lft = valid_lft;
2126 ifp->prefered_lft = prefered_lft;
2127 ifp->tstamp = jiffies;
Herbert Xu06aebfb2006-08-09 16:52:04 -07002128 spin_unlock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002129
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002130 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002131 expires, flags);
Neil Horman95c385b2007-04-25 17:08:10 -07002132 /*
2133 * Note that section 3.1 of RFC 4429 indicates
2134 * that the Optimistic flag should not be set for
2135 * manually configured addresses
2136 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 addrconf_dad_start(ifp, 0);
2138 in6_ifa_put(ifp);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002139 addrconf_verify(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 return 0;
2141 }
2142
2143 return PTR_ERR(ifp);
2144}
2145
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002146static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002147 unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148{
2149 struct inet6_ifaddr *ifp;
2150 struct inet6_dev *idev;
2151 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002152
Thomas Graf24ef0da2008-05-28 16:54:22 +02002153 if (plen > 128)
2154 return -EINVAL;
2155
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002156 dev = __dev_get_by_index(net, ifindex);
2157 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 return -ENODEV;
2159
2160 if ((idev = __in6_dev_get(dev)) == NULL)
2161 return -ENXIO;
2162
2163 read_lock_bh(&idev->lock);
2164 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2165 if (ifp->prefix_len == plen &&
2166 ipv6_addr_equal(pfx, &ifp->addr)) {
2167 in6_ifa_hold(ifp);
2168 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002169
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 ipv6_del_addr(ifp);
2171
2172 /* If the last address is deleted administratively,
2173 disable IPv6 on this interface.
2174 */
2175 if (idev->addr_list == NULL)
2176 addrconf_ifdown(idev->dev, 1);
2177 return 0;
2178 }
2179 }
2180 read_unlock_bh(&idev->lock);
2181 return -EADDRNOTAVAIL;
2182}
2183
2184
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002185int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186{
2187 struct in6_ifreq ireq;
2188 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002189
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 if (!capable(CAP_NET_ADMIN))
2191 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002192
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2194 return -EFAULT;
2195
2196 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002197 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2198 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2199 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 rtnl_unlock();
2201 return err;
2202}
2203
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002204int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205{
2206 struct in6_ifreq ireq;
2207 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002208
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 if (!capable(CAP_NET_ADMIN))
2210 return -EPERM;
2211
2212 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2213 return -EFAULT;
2214
2215 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002216 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2217 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 rtnl_unlock();
2219 return err;
2220}
2221
Joerg Roedel0be669b2006-10-10 14:49:53 -07002222#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223static void sit_add_v4_addrs(struct inet6_dev *idev)
2224{
2225 struct inet6_ifaddr * ifp;
2226 struct in6_addr addr;
2227 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002228 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 int scope;
2230
2231 ASSERT_RTNL();
2232
2233 memset(&addr, 0, sizeof(struct in6_addr));
2234 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2235
2236 if (idev->dev->flags&IFF_POINTOPOINT) {
2237 addr.s6_addr32[0] = htonl(0xfe800000);
2238 scope = IFA_LINK;
2239 } else {
2240 scope = IPV6_ADDR_COMPATv4;
2241 }
2242
2243 if (addr.s6_addr32[3]) {
2244 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2245 if (!IS_ERR(ifp)) {
2246 spin_lock_bh(&ifp->lock);
2247 ifp->flags &= ~IFA_F_TENTATIVE;
2248 spin_unlock_bh(&ifp->lock);
2249 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2250 in6_ifa_put(ifp);
2251 }
2252 return;
2253 }
2254
Benjamin Thery6fda7352008-03-05 10:47:47 -08002255 for_each_netdev(net, dev) {
Herbert Xue5ed6392005-10-03 14:35:55 -07002256 struct in_device * in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257 if (in_dev && (dev->flags & IFF_UP)) {
2258 struct in_ifaddr * ifa;
2259
2260 int flag = scope;
2261
2262 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2263 int plen;
2264
2265 addr.s6_addr32[3] = ifa->ifa_local;
2266
2267 if (ifa->ifa_scope == RT_SCOPE_LINK)
2268 continue;
2269 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2270 if (idev->dev->flags&IFF_POINTOPOINT)
2271 continue;
2272 flag |= IFA_HOST;
2273 }
2274 if (idev->dev->flags&IFF_POINTOPOINT)
2275 plen = 64;
2276 else
2277 plen = 96;
2278
2279 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2280 IFA_F_PERMANENT);
2281 if (!IS_ERR(ifp)) {
2282 spin_lock_bh(&ifp->lock);
2283 ifp->flags &= ~IFA_F_TENTATIVE;
2284 spin_unlock_bh(&ifp->lock);
2285 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2286 in6_ifa_put(ifp);
2287 }
2288 }
2289 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002292#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293
2294static void init_loopback(struct net_device *dev)
2295{
2296 struct inet6_dev *idev;
2297 struct inet6_ifaddr * ifp;
2298
2299 /* ::1 */
2300
2301 ASSERT_RTNL();
2302
2303 if ((idev = ipv6_find_idev(dev)) == NULL) {
2304 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2305 return;
2306 }
2307
2308 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2309 if (!IS_ERR(ifp)) {
2310 spin_lock_bh(&ifp->lock);
2311 ifp->flags &= ~IFA_F_TENTATIVE;
2312 spin_unlock_bh(&ifp->lock);
2313 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2314 in6_ifa_put(ifp);
2315 }
2316}
2317
2318static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2319{
2320 struct inet6_ifaddr * ifp;
Neil Horman95c385b2007-04-25 17:08:10 -07002321 u32 addr_flags = IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322
Neil Horman95c385b2007-04-25 17:08:10 -07002323#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2324 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002325 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002326 addr_flags |= IFA_F_OPTIMISTIC;
2327#endif
2328
2329
2330 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002332 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 addrconf_dad_start(ifp, 0);
2334 in6_ifa_put(ifp);
2335 }
2336}
2337
2338static void addrconf_dev_config(struct net_device *dev)
2339{
2340 struct in6_addr addr;
2341 struct inet6_dev * idev;
2342
2343 ASSERT_RTNL();
2344
Herbert Xu74235a22007-06-14 13:02:55 -07002345 if ((dev->type != ARPHRD_ETHER) &&
2346 (dev->type != ARPHRD_FDDI) &&
2347 (dev->type != ARPHRD_IEEE802_TR) &&
2348 (dev->type != ARPHRD_ARCNET) &&
2349 (dev->type != ARPHRD_INFINIBAND)) {
2350 /* Alas, we support only Ethernet autoconfiguration. */
2351 return;
2352 }
2353
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 idev = addrconf_add_dev(dev);
2355 if (idev == NULL)
2356 return;
2357
2358 memset(&addr, 0, sizeof(struct in6_addr));
2359 addr.s6_addr32[0] = htonl(0xFE800000);
2360
2361 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2362 addrconf_add_linklocal(idev, &addr);
2363}
2364
Joerg Roedel0be669b2006-10-10 14:49:53 -07002365#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366static void addrconf_sit_config(struct net_device *dev)
2367{
2368 struct inet6_dev *idev;
2369
2370 ASSERT_RTNL();
2371
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002372 /*
2373 * Configure the tunnel with one of our IPv4
2374 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375 * our v4 addrs in the tunnel
2376 */
2377
2378 if ((idev = ipv6_find_idev(dev)) == NULL) {
2379 printk(KERN_DEBUG "init sit: add_dev failed\n");
2380 return;
2381 }
2382
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002383 if (dev->priv_flags & IFF_ISATAP) {
2384 struct in6_addr addr;
2385
2386 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2387 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2388 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2389 addrconf_add_linklocal(idev, &addr);
2390 return;
2391 }
2392
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 sit_add_v4_addrs(idev);
2394
2395 if (dev->flags&IFF_POINTOPOINT) {
2396 addrconf_add_mroute(dev);
2397 addrconf_add_lroute(dev);
2398 } else
2399 sit_route_add(dev);
2400}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002401#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
2403static inline int
2404ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2405{
2406 struct in6_addr lladdr;
2407
Neil Horman95c385b2007-04-25 17:08:10 -07002408 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 addrconf_add_linklocal(idev, &lladdr);
2410 return 0;
2411 }
2412 return -1;
2413}
2414
2415static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2416{
2417 struct net_device *link_dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002418 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419
2420 /* first try to inherit the link-local address from the link device */
2421 if (idev->dev->iflink &&
Benjamin Thery6fda7352008-03-05 10:47:47 -08002422 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 if (!ipv6_inherit_linklocal(idev, link_dev))
2424 return;
2425 }
2426 /* then try to inherit it from any device */
Benjamin Thery6fda7352008-03-05 10:47:47 -08002427 for_each_netdev(net, link_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428 if (!ipv6_inherit_linklocal(idev, link_dev))
2429 return;
2430 }
2431 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2432}
2433
2434/*
2435 * Autoconfigure tunnel with a link-local address so routing protocols,
2436 * DHCPv6, MLD etc. can be run over the virtual link
2437 */
2438
2439static void addrconf_ip6_tnl_config(struct net_device *dev)
2440{
2441 struct inet6_dev *idev;
2442
2443 ASSERT_RTNL();
2444
2445 if ((idev = addrconf_add_dev(dev)) == NULL) {
2446 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2447 return;
2448 }
2449 ip6_tnl_add_linklocal(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450}
2451
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002452static int addrconf_notify(struct notifier_block *this, unsigned long event,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453 void * data)
2454{
2455 struct net_device *dev = (struct net_device *) data;
Herbert Xu74235a22007-06-14 13:02:55 -07002456 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002457 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07002458 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459
2460 switch(event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002461 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07002462 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002463 idev = ipv6_add_dev(dev);
2464 if (!idev)
Herbert Xub217d612007-07-30 17:04:52 -07002465 return notifier_from_errno(-ENOMEM);
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002466 }
2467 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002469 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07002470 if (dev->flags & IFF_SLAVE)
2471 break;
2472
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002473 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002474 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002475 /* device is not ready yet. */
2476 printk(KERN_INFO
2477 "ADDRCONF(NETDEV_UP): %s: "
2478 "link is not ready\n",
2479 dev->name);
2480 break;
2481 }
Kristian Slavov99081042006-02-08 16:10:53 -08002482
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002483 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2484 idev = ipv6_add_dev(dev);
2485
Kristian Slavov99081042006-02-08 16:10:53 -08002486 if (idev)
2487 idev->if_flags |= IF_READY;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002488 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002489 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002490 /* device is still not ready. */
2491 break;
2492 }
2493
2494 if (idev) {
2495 if (idev->if_flags & IF_READY) {
2496 /* device is already configured. */
2497 break;
2498 }
2499 idev->if_flags |= IF_READY;
2500 }
2501
2502 printk(KERN_INFO
2503 "ADDRCONF(NETDEV_CHANGE): %s: "
2504 "link becomes ready\n",
2505 dev->name);
2506
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002507 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002508 }
2509
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 switch(dev->type) {
Joerg Roedel0be669b2006-10-10 14:49:53 -07002511#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 case ARPHRD_SIT:
2513 addrconf_sit_config(dev);
2514 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002515#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516 case ARPHRD_TUNNEL6:
2517 addrconf_ip6_tnl_config(dev);
2518 break;
2519 case ARPHRD_LOOPBACK:
2520 init_loopback(dev);
2521 break;
2522
2523 default:
2524 addrconf_dev_config(dev);
2525 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 if (idev) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002528 if (run_pending)
2529 addrconf_dad_run(idev);
2530
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531 /* If the MTU changed during the interface down, when the
2532 interface up, the changed MTU must be reflected in the
2533 idev as well as routers.
2534 */
2535 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2536 rt6_mtu_change(dev, dev->mtu);
2537 idev->cnf.mtu6 = dev->mtu;
2538 }
2539 idev->tstamp = jiffies;
2540 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2541 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2542 stop IPv6 on this interface.
2543 */
2544 if (dev->mtu < IPV6_MIN_MTU)
2545 addrconf_ifdown(dev, event != NETDEV_DOWN);
2546 }
2547 break;
2548
2549 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002550 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551 rt6_mtu_change(dev, dev->mtu);
2552 idev->cnf.mtu6 = dev->mtu;
2553 break;
2554 }
2555
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002556 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2557 idev = ipv6_add_dev(dev);
2558 if (idev)
2559 break;
2560 }
2561
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2563
2564 case NETDEV_DOWN:
2565 case NETDEV_UNREGISTER:
2566 /*
2567 * Remove all addresses from this interface.
2568 */
2569 addrconf_ifdown(dev, event != NETDEV_DOWN);
2570 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002571
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07002574 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002575 addrconf_sysctl_unregister(idev);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11002576 addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07002577 err = snmp6_register_dev(idev);
2578 if (err)
2579 return notifier_from_errno(err);
Stephen Hemminger5632c512007-04-28 21:16:39 -07002580 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002582 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583
2584 return NOTIFY_OK;
2585}
2586
2587/*
2588 * addrconf module should be notified of a device going up
2589 */
2590static struct notifier_block ipv6_dev_notf = {
2591 .notifier_call = addrconf_notify,
2592 .priority = 0
2593};
2594
2595static int addrconf_ifdown(struct net_device *dev, int how)
2596{
2597 struct inet6_dev *idev;
2598 struct inet6_ifaddr *ifa, **bifa;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002599 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 int i;
2601
2602 ASSERT_RTNL();
2603
Denis V. Luneveb867572008-04-03 13:31:53 -07002604 if ((dev->flags & IFF_LOOPBACK) && how == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605 how = 0;
2606
Daniel Lezcanof3db4852008-03-03 23:27:06 -08002607 rt6_ifdown(net, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 neigh_ifdown(&nd_tbl, dev);
2609
2610 idev = __in6_dev_get(dev);
2611 if (idev == NULL)
2612 return -ENODEV;
2613
2614 /* Step 1: remove reference to ipv6 device from parent device.
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002615 Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002617 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002619
2620 /* protected by rtnl_lock */
2621 rcu_assign_pointer(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622
2623 /* Step 1.5: remove snmp6 entry */
2624 snmp6_unregister_dev(idev);
2625
2626 }
2627
2628 /* Step 2: clear hash table */
2629 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2630 bifa = &inet6_addr_lst[i];
2631
2632 write_lock_bh(&addrconf_hash_lock);
2633 while ((ifa = *bifa) != NULL) {
2634 if (ifa->idev == idev) {
2635 *bifa = ifa->lst_next;
2636 ifa->lst_next = NULL;
2637 addrconf_del_timer(ifa);
2638 in6_ifa_put(ifa);
2639 continue;
2640 }
2641 bifa = &ifa->lst_next;
2642 }
2643 write_unlock_bh(&addrconf_hash_lock);
2644 }
2645
2646 write_lock_bh(&idev->lock);
2647
2648 /* Step 3: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002649 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002650 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651
2652 /* Step 4: clear address list */
2653#ifdef CONFIG_IPV6_PRIVACY
Denis V. Lunev439e2382008-04-03 13:30:17 -07002654 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002655 in6_dev_put(idev);
2656
2657 /* clear tempaddr list */
2658 while ((ifa = idev->tempaddr_list) != NULL) {
2659 idev->tempaddr_list = ifa->tmp_next;
2660 ifa->tmp_next = NULL;
2661 ifa->dead = 1;
2662 write_unlock_bh(&idev->lock);
2663 spin_lock_bh(&ifa->lock);
2664
2665 if (ifa->ifpub) {
2666 in6_ifa_put(ifa->ifpub);
2667 ifa->ifpub = NULL;
2668 }
2669 spin_unlock_bh(&ifa->lock);
2670 in6_ifa_put(ifa);
2671 write_lock_bh(&idev->lock);
2672 }
2673#endif
2674 while ((ifa = idev->addr_list) != NULL) {
2675 idev->addr_list = ifa->if_next;
2676 ifa->if_next = NULL;
2677 ifa->dead = 1;
2678 addrconf_del_timer(ifa);
2679 write_unlock_bh(&idev->lock);
2680
2681 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Vlad Yasevich063ed362007-07-15 00:16:35 -07002682 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683 in6_ifa_put(ifa);
2684
2685 write_lock_bh(&idev->lock);
2686 }
2687 write_unlock_bh(&idev->lock);
2688
2689 /* Step 5: Discard multicast list */
2690
Denis V. Lunev439e2382008-04-03 13:30:17 -07002691 if (how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692 ipv6_mc_destroy_dev(idev);
2693 else
2694 ipv6_mc_down(idev);
2695
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002697
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 /* Shot the device (if unregistered) */
2699
Denis V. Lunev439e2382008-04-03 13:30:17 -07002700 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002701 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 neigh_parms_release(&nd_tbl, idev->nd_parms);
2703 neigh_ifdown(&nd_tbl, dev);
2704 in6_dev_put(idev);
2705 }
2706 return 0;
2707}
2708
2709static void addrconf_rs_timer(unsigned long data)
2710{
2711 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2712
2713 if (ifp->idev->cnf.forwarding)
2714 goto out;
2715
2716 if (ifp->idev->if_flags & IF_RA_RCVD) {
2717 /*
2718 * Announcement received after solicitation
2719 * was sent
2720 */
2721 goto out;
2722 }
2723
2724 spin_lock(&ifp->lock);
2725 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 /* The wait after the last probe can be shorter */
2727 addrconf_mod_timer(ifp, AC_RS,
2728 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2729 ifp->idev->cnf.rtr_solicit_delay :
2730 ifp->idev->cnf.rtr_solicit_interval);
2731 spin_unlock(&ifp->lock);
2732
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002733 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 } else {
2735 spin_unlock(&ifp->lock);
2736 /*
2737 * Note: we do not support deprecated "all on-link"
2738 * assumption any longer.
2739 */
2740 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2741 ifp->idev->dev->name);
2742 }
2743
2744out:
2745 in6_ifa_put(ifp);
2746}
2747
2748/*
2749 * Duplicate Address Detection
2750 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002751static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2752{
2753 unsigned long rand_num;
2754 struct inet6_dev *idev = ifp->idev;
2755
Neil Horman95c385b2007-04-25 17:08:10 -07002756 if (ifp->flags & IFA_F_OPTIMISTIC)
2757 rand_num = 0;
2758 else
2759 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2760
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002761 ifp->probes = idev->cnf.dad_transmits;
2762 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2763}
2764
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07002765static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766{
2767 struct inet6_dev *idev = ifp->idev;
2768 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769
2770 addrconf_join_solict(dev, &ifp->addr);
2771
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 net_srandom(ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773
2774 read_lock_bh(&idev->lock);
2775 if (ifp->dead)
2776 goto out;
2777 spin_lock_bh(&ifp->lock);
2778
2779 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09002780 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07002781 !(ifp->flags&IFA_F_TENTATIVE) ||
2782 ifp->flags & IFA_F_NODAD) {
Neil Horman95c385b2007-04-25 17:08:10 -07002783 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784 spin_unlock_bh(&ifp->lock);
2785 read_unlock_bh(&idev->lock);
2786
2787 addrconf_dad_completed(ifp);
2788 return;
2789 }
2790
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002791 if (!(idev->if_flags & IF_READY)) {
YOSHIFUJI Hideaki3dd3bf82005-12-23 11:23:21 -08002792 spin_unlock_bh(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002793 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002794 /*
2795 * If the defice is not ready:
2796 * - keep it tentative if it is a permanent address.
2797 * - otherwise, kill it.
2798 */
2799 in6_ifa_hold(ifp);
2800 addrconf_dad_stop(ifp);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002801 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002802 }
Neil Horman95c385b2007-04-25 17:08:10 -07002803
2804 /*
2805 * Optimistic nodes can start receiving
2806 * Frames right away
2807 */
2808 if(ifp->flags & IFA_F_OPTIMISTIC)
2809 ip6_ins_rt(ifp->rt);
2810
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002811 addrconf_dad_kick(ifp);
2812 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813out:
2814 read_unlock_bh(&idev->lock);
2815}
2816
2817static void addrconf_dad_timer(unsigned long data)
2818{
2819 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2820 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 struct in6_addr mcaddr;
2822
2823 read_lock_bh(&idev->lock);
2824 if (idev->dead) {
2825 read_unlock_bh(&idev->lock);
2826 goto out;
2827 }
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09002828 if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) {
2829 read_unlock_bh(&idev->lock);
2830 addrconf_dad_failure(ifp);
2831 return;
2832 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833 spin_lock_bh(&ifp->lock);
2834 if (ifp->probes == 0) {
2835 /*
2836 * DAD was successful
2837 */
2838
Neil Horman95c385b2007-04-25 17:08:10 -07002839 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840 spin_unlock_bh(&ifp->lock);
2841 read_unlock_bh(&idev->lock);
2842
2843 addrconf_dad_completed(ifp);
2844
2845 goto out;
2846 }
2847
2848 ifp->probes--;
2849 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2850 spin_unlock_bh(&ifp->lock);
2851 read_unlock_bh(&idev->lock);
2852
2853 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09002855 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856out:
2857 in6_ifa_put(ifp);
2858}
2859
2860static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2861{
2862 struct net_device * dev = ifp->idev->dev;
2863
2864 /*
2865 * Configure the address for reception. Now it is valid.
2866 */
2867
2868 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2869
2870 /* If added prefix is link local and forwarding is off,
2871 start sending router solicitations.
2872 */
2873
2874 if (ifp->idev->cnf.forwarding == 0 &&
2875 ifp->idev->cnf.rtr_solicits > 0 &&
2876 (dev->flags&IFF_LOOPBACK) == 0 &&
2877 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878 /*
2879 * If a host as already performed a random delay
2880 * [...] as part of DAD [...] there is no need
2881 * to delay again before sending the first RS
2882 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002883 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002884
2885 spin_lock_bh(&ifp->lock);
2886 ifp->probes = 1;
2887 ifp->idev->if_flags |= IF_RS_SENT;
2888 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2889 spin_unlock_bh(&ifp->lock);
2890 }
2891}
2892
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002893static void addrconf_dad_run(struct inet6_dev *idev) {
2894 struct inet6_ifaddr *ifp;
2895
2896 read_lock_bh(&idev->lock);
2897 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2898 spin_lock_bh(&ifp->lock);
2899 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2900 spin_unlock_bh(&ifp->lock);
2901 continue;
2902 }
2903 spin_unlock_bh(&ifp->lock);
2904 addrconf_dad_kick(ifp);
2905 }
2906 read_unlock_bh(&idev->lock);
2907}
2908
Linus Torvalds1da177e2005-04-16 15:20:36 -07002909#ifdef CONFIG_PROC_FS
2910struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08002911 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912 int bucket;
2913};
2914
2915static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2916{
2917 struct inet6_ifaddr *ifa = NULL;
2918 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002919 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002920
2921 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2922 ifa = inet6_addr_lst[state->bucket];
Daniel Lezcano3c400902008-01-10 22:42:49 -08002923
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09002924 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
Daniel Lezcano3c400902008-01-10 22:42:49 -08002925 ifa = ifa->lst_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926 if (ifa)
2927 break;
2928 }
2929 return ifa;
2930}
2931
2932static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2933{
2934 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002935 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002936
2937 ifa = ifa->lst_next;
2938try_again:
Daniel Lezcano3c400902008-01-10 22:42:49 -08002939 if (ifa) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09002940 if (!net_eq(dev_net(ifa->idev->dev), net)) {
Daniel Lezcano3c400902008-01-10 22:42:49 -08002941 ifa = ifa->lst_next;
2942 goto try_again;
2943 }
2944 }
2945
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2947 ifa = inet6_addr_lst[state->bucket];
2948 goto try_again;
2949 }
Daniel Lezcano3c400902008-01-10 22:42:49 -08002950
Linus Torvalds1da177e2005-04-16 15:20:36 -07002951 return ifa;
2952}
2953
2954static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2955{
2956 struct inet6_ifaddr *ifa = if6_get_first(seq);
2957
2958 if (ifa)
2959 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2960 --pos;
2961 return pos ? NULL : ifa;
2962}
2963
2964static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002965 __acquires(addrconf_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002966{
2967 read_lock_bh(&addrconf_hash_lock);
2968 return if6_get_idx(seq, *pos);
2969}
2970
2971static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2972{
2973 struct inet6_ifaddr *ifa;
2974
2975 ifa = if6_get_next(seq, v);
2976 ++*pos;
2977 return ifa;
2978}
2979
2980static void if6_seq_stop(struct seq_file *seq, void *v)
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002981 __releases(addrconf_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982{
2983 read_unlock_bh(&addrconf_hash_lock);
2984}
2985
2986static int if6_seq_show(struct seq_file *seq, void *v)
2987{
2988 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002989 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07002990 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 ifp->idev->dev->ifindex,
2992 ifp->prefix_len,
2993 ifp->scope,
2994 ifp->flags,
2995 ifp->idev->dev->name);
2996 return 0;
2997}
2998
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002999static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000 .start = if6_seq_start,
3001 .next = if6_seq_next,
3002 .show = if6_seq_show,
3003 .stop = if6_seq_stop,
3004};
3005
3006static int if6_seq_open(struct inode *inode, struct file *file)
3007{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003008 return seq_open_net(inode, file, &if6_seq_ops,
3009 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003010}
3011
Arjan van de Ven9a321442007-02-12 00:55:35 -08003012static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 .owner = THIS_MODULE,
3014 .open = if6_seq_open,
3015 .read = seq_read,
3016 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003017 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003018};
3019
Daniel Lezcano3c400902008-01-10 22:42:49 -08003020static int if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003022 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003023 return -ENOMEM;
3024 return 0;
3025}
3026
Daniel Lezcano3c400902008-01-10 22:42:49 -08003027static void if6_proc_net_exit(struct net *net)
3028{
3029 proc_net_remove(net, "if_inet6");
3030}
3031
3032static struct pernet_operations if6_proc_net_ops = {
3033 .init = if6_proc_net_init,
3034 .exit = if6_proc_net_exit,
3035};
3036
3037int __init if6_proc_init(void)
3038{
3039 return register_pernet_subsys(&if6_proc_net_ops);
3040}
3041
Linus Torvalds1da177e2005-04-16 15:20:36 -07003042void if6_proc_exit(void)
3043{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003044 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003045}
3046#endif /* CONFIG_PROC_FS */
3047
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -07003048#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003049/* Check if address is a home address configured on any interface. */
Daniel Lezcano389f6612008-01-10 22:44:40 -08003050int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003051{
3052 int ret = 0;
3053 struct inet6_ifaddr * ifp;
3054 u8 hash = ipv6_addr_hash(addr);
3055 read_lock_bh(&addrconf_hash_lock);
3056 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003057 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003058 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003059 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003060 (ifp->flags & IFA_F_HOMEADDRESS)) {
3061 ret = 1;
3062 break;
3063 }
3064 }
3065 read_unlock_bh(&addrconf_hash_lock);
3066 return ret;
3067}
3068#endif
3069
Linus Torvalds1da177e2005-04-16 15:20:36 -07003070/*
3071 * Periodic address status verification
3072 */
3073
3074static void addrconf_verify(unsigned long foo)
3075{
3076 struct inet6_ifaddr *ifp;
3077 unsigned long now, next;
3078 int i;
3079
3080 spin_lock_bh(&addrconf_verify_lock);
3081 now = jiffies;
3082 next = now + ADDR_CHECK_FREQUENCY;
3083
3084 del_timer(&addr_chk_timer);
3085
3086 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3087
3088restart:
Yan Zheng5d5780d2005-11-20 13:42:20 -08003089 read_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3091 unsigned long age;
3092#ifdef CONFIG_IPV6_PRIVACY
3093 unsigned long regen_advance;
3094#endif
3095
3096 if (ifp->flags & IFA_F_PERMANENT)
3097 continue;
3098
3099 spin_lock(&ifp->lock);
3100 age = (now - ifp->tstamp) / HZ;
3101
3102#ifdef CONFIG_IPV6_PRIVACY
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003103 regen_advance = ifp->idev->cnf.regen_max_retry *
3104 ifp->idev->cnf.dad_transmits *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105 ifp->idev->nd_parms->retrans_time / HZ;
3106#endif
3107
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003108 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3109 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110 spin_unlock(&ifp->lock);
3111 in6_ifa_hold(ifp);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003112 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 ipv6_del_addr(ifp);
3114 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003115 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3116 spin_unlock(&ifp->lock);
3117 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118 } else if (age >= ifp->prefered_lft) {
3119 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3120 int deprecate = 0;
3121
3122 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3123 deprecate = 1;
3124 ifp->flags |= IFA_F_DEPRECATED;
3125 }
3126
3127 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3128 next = ifp->tstamp + ifp->valid_lft * HZ;
3129
3130 spin_unlock(&ifp->lock);
3131
3132 if (deprecate) {
3133 in6_ifa_hold(ifp);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003134 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135
3136 ipv6_ifa_notify(0, ifp);
3137 in6_ifa_put(ifp);
3138 goto restart;
3139 }
3140#ifdef CONFIG_IPV6_PRIVACY
3141 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3142 !(ifp->flags&IFA_F_TENTATIVE)) {
3143 if (age >= ifp->prefered_lft - regen_advance) {
3144 struct inet6_ifaddr *ifpub = ifp->ifpub;
3145 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3146 next = ifp->tstamp + ifp->prefered_lft * HZ;
3147 if (!ifp->regen_count && ifpub) {
3148 ifp->regen_count++;
3149 in6_ifa_hold(ifp);
3150 in6_ifa_hold(ifpub);
3151 spin_unlock(&ifp->lock);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003152 read_unlock(&addrconf_hash_lock);
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003153 spin_lock(&ifpub->lock);
3154 ifpub->regen_count = 0;
3155 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156 ipv6_create_tempaddr(ifpub, ifp);
3157 in6_ifa_put(ifpub);
3158 in6_ifa_put(ifp);
3159 goto restart;
3160 }
3161 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3162 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3163 spin_unlock(&ifp->lock);
3164#endif
3165 } else {
3166 /* ifp->prefered_lft <= ifp->valid_lft */
3167 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3168 next = ifp->tstamp + ifp->prefered_lft * HZ;
3169 spin_unlock(&ifp->lock);
3170 }
3171 }
Yan Zheng5d5780d2005-11-20 13:42:20 -08003172 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003173 }
3174
3175 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3176 add_timer(&addr_chk_timer);
3177 spin_unlock_bh(&addrconf_verify_lock);
3178}
3179
Thomas Graf461d8832006-09-18 00:09:49 -07003180static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3181{
3182 struct in6_addr *pfx = NULL;
3183
3184 if (addr)
3185 pfx = nla_data(addr);
3186
3187 if (local) {
3188 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3189 pfx = NULL;
3190 else
3191 pfx = nla_data(local);
3192 }
3193
3194 return pfx;
3195}
3196
Patrick McHardyef7c79e2007-06-05 12:38:30 -07003197static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07003198 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3199 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3200 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3201};
3202
Linus Torvalds1da177e2005-04-16 15:20:36 -07003203static int
3204inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3205{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003206 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07003207 struct ifaddrmsg *ifm;
3208 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003209 struct in6_addr *pfx;
Thomas Grafb933f712006-09-18 00:10:19 -07003210 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003211
Thomas Grafb933f712006-09-18 00:10:19 -07003212 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3213 if (err < 0)
3214 return err;
3215
3216 ifm = nlmsg_data(nlh);
3217 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218 if (pfx == NULL)
3219 return -EINVAL;
3220
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003221 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003222}
3223
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003224static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3225 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003226{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003227 u32 flags;
3228 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003229 unsigned long timeout;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003230
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003231 if (!valid_lft || (prefered_lft > valid_lft))
3232 return -EINVAL;
3233
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003234 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3235 if (addrconf_finite_timeout(timeout)) {
3236 expires = jiffies_to_clock_t(timeout * HZ);
3237 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003238 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003239 } else {
3240 expires = 0;
3241 flags = 0;
3242 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003243 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003244
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003245 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3246 if (addrconf_finite_timeout(timeout)) {
3247 if (timeout == 0)
3248 ifa_flags |= IFA_F_DEPRECATED;
3249 prefered_lft = timeout;
3250 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003251
3252 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003253 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003254 ifp->tstamp = jiffies;
3255 ifp->valid_lft = valid_lft;
3256 ifp->prefered_lft = prefered_lft;
3257
3258 spin_unlock_bh(&ifp->lock);
3259 if (!(ifp->flags&IFA_F_TENTATIVE))
3260 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003261
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003262 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003263 expires, flags);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003264 addrconf_verify(0);
3265
3266 return 0;
3267}
3268
3269static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003270inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3271{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003272 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07003273 struct ifaddrmsg *ifm;
3274 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275 struct in6_addr *pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07003276 struct inet6_ifaddr *ifa;
3277 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003278 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3279 u8 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07003280 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003281
Thomas Graf461d8832006-09-18 00:09:49 -07003282 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3283 if (err < 0)
3284 return err;
3285
3286 ifm = nlmsg_data(nlh);
3287 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288 if (pfx == NULL)
3289 return -EINVAL;
3290
Thomas Graf461d8832006-09-18 00:09:49 -07003291 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003292 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07003293
3294 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003295 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07003296 preferred_lft = ci->ifa_prefered;
3297 } else {
3298 preferred_lft = INFINITY_LIFE_TIME;
3299 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003300 }
3301
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003302 dev = __dev_get_by_index(net, ifm->ifa_index);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003303 if (dev == NULL)
3304 return -ENODEV;
3305
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003306 /* We ignore other flags so far. */
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003307 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003308
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003309 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003310 if (ifa == NULL) {
3311 /*
3312 * It would be best to check for !NLM_F_CREATE here but
3313 * userspace alreay relies on not having to provide this.
3314 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003315 return inet6_addr_add(net, ifm->ifa_index, pfx,
3316 ifm->ifa_prefixlen, ifa_flags,
3317 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003318 }
3319
Thomas Graf7198f8c2006-09-18 00:13:46 -07003320 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3321 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3322 err = -EEXIST;
3323 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003324 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003325
3326 in6_ifa_put(ifa);
3327
3328 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003329}
3330
Thomas Graf101bb222006-09-18 00:11:52 -07003331static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3332 u8 scope, int ifindex)
3333{
3334 struct ifaddrmsg *ifm;
3335
3336 ifm = nlmsg_data(nlh);
3337 ifm->ifa_family = AF_INET6;
3338 ifm->ifa_prefixlen = prefixlen;
3339 ifm->ifa_flags = flags;
3340 ifm->ifa_scope = scope;
3341 ifm->ifa_index = ifindex;
3342}
3343
Thomas Graf85486af2006-09-18 00:11:24 -07003344static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3345 unsigned long tstamp, u32 preferred, u32 valid)
3346{
3347 struct ifa_cacheinfo ci;
3348
3349 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3350 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3351 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3352 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3353 ci.ifa_prefered = preferred;
3354 ci.ifa_valid = valid;
3355
3356 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3357}
3358
Thomas Graf101bb222006-09-18 00:11:52 -07003359static inline int rt_scope(int ifa_scope)
3360{
3361 if (ifa_scope & IFA_HOST)
3362 return RT_SCOPE_HOST;
3363 else if (ifa_scope & IFA_LINK)
3364 return RT_SCOPE_LINK;
3365 else if (ifa_scope & IFA_SITE)
3366 return RT_SCOPE_SITE;
3367 else
3368 return RT_SCOPE_UNIVERSE;
3369}
3370
Thomas Graf0ab68032006-09-18 00:12:35 -07003371static inline int inet6_ifaddr_msgsize(void)
3372{
Thomas Graf339bf982006-11-10 14:10:15 -08003373 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3374 + nla_total_size(16) /* IFA_ADDRESS */
3375 + nla_total_size(sizeof(struct ifa_cacheinfo));
Thomas Graf0ab68032006-09-18 00:12:35 -07003376}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003377
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003379 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07003382 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383
Thomas Graf0ab68032006-09-18 00:12:35 -07003384 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3385 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003386 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003387
Thomas Graf101bb222006-09-18 00:11:52 -07003388 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3389 ifa->idev->dev->ifindex);
3390
Linus Torvalds1da177e2005-04-16 15:20:36 -07003391 if (!(ifa->flags&IFA_F_PERMANENT)) {
Thomas Graf85486af2006-09-18 00:11:24 -07003392 preferred = ifa->prefered_lft;
3393 valid = ifa->valid_lft;
3394 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395 long tval = (jiffies - ifa->tstamp)/HZ;
Thomas Graf85486af2006-09-18 00:11:24 -07003396 preferred -= tval;
3397 if (valid != INFINITY_LIFE_TIME)
3398 valid -= tval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399 }
3400 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07003401 preferred = INFINITY_LIFE_TIME;
3402 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003403 }
Thomas Graf85486af2006-09-18 00:11:24 -07003404
Thomas Graf0ab68032006-09-18 00:12:35 -07003405 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
Patrick McHardy26932562007-01-31 23:16:40 -08003406 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3407 nlmsg_cancel(skb, nlh);
3408 return -EMSGSIZE;
3409 }
Thomas Graf85486af2006-09-18 00:11:24 -07003410
Thomas Graf0ab68032006-09-18 00:12:35 -07003411 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003412}
3413
3414static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07003415 u32 pid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003416{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003418 u8 scope = RT_SCOPE_UNIVERSE;
3419 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003420
Thomas Graf101bb222006-09-18 00:11:52 -07003421 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3422 scope = RT_SCOPE_SITE;
3423
Thomas Graf0ab68032006-09-18 00:12:35 -07003424 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3425 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003426 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003427
Thomas Graf101bb222006-09-18 00:11:52 -07003428 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003429 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3430 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003431 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3432 nlmsg_cancel(skb, nlh);
3433 return -EMSGSIZE;
3434 }
Thomas Graf85486af2006-09-18 00:11:24 -07003435
Thomas Graf0ab68032006-09-18 00:12:35 -07003436 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437}
3438
3439static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003440 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003443 u8 scope = RT_SCOPE_UNIVERSE;
3444 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445
Thomas Graf101bb222006-09-18 00:11:52 -07003446 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3447 scope = RT_SCOPE_SITE;
3448
Thomas Graf0ab68032006-09-18 00:12:35 -07003449 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3450 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003451 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003452
Thomas Graf101bb222006-09-18 00:11:52 -07003453 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003454 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3455 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003456 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3457 nlmsg_cancel(skb, nlh);
3458 return -EMSGSIZE;
3459 }
Thomas Graf85486af2006-09-18 00:11:24 -07003460
Thomas Graf0ab68032006-09-18 00:12:35 -07003461 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462}
3463
3464enum addr_type_t
3465{
3466 UNICAST_ADDR,
3467 MULTICAST_ADDR,
3468 ANYCAST_ADDR,
3469};
3470
3471static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3472 enum addr_type_t type)
3473{
3474 int idx, ip_idx;
3475 int s_idx, s_ip_idx;
3476 int err = 1;
3477 struct net_device *dev;
3478 struct inet6_dev *idev = NULL;
3479 struct inet6_ifaddr *ifa;
3480 struct ifmcaddr6 *ifmca;
3481 struct ifacaddr6 *ifaca;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003482 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483
3484 s_idx = cb->args[0];
3485 s_ip_idx = ip_idx = cb->args[1];
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003486
Pavel Emelianov7562f872007-05-03 15:13:45 -07003487 idx = 0;
Benjamin Thery6fda7352008-03-05 10:47:47 -08003488 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003489 if (idx < s_idx)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003490 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003491 if (idx > s_idx)
3492 s_ip_idx = 0;
3493 ip_idx = 0;
3494 if ((idev = in6_dev_get(dev)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003495 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003496 read_lock_bh(&idev->lock);
3497 switch (type) {
3498 case UNICAST_ADDR:
YOSHIFUJI Hideakiae9cda52005-06-28 13:00:30 -07003499 /* unicast address incl. temp addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 for (ifa = idev->addr_list; ifa;
3501 ifa = ifa->if_next, ip_idx++) {
3502 if (ip_idx < s_ip_idx)
3503 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003504 err = inet6_fill_ifaddr(skb, ifa,
3505 NETLINK_CB(cb->skb).pid,
3506 cb->nlh->nlmsg_seq,
3507 RTM_NEWADDR,
3508 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003510 break;
3511 case MULTICAST_ADDR:
3512 /* multicast address */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003513 for (ifmca = idev->mc_list; ifmca;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514 ifmca = ifmca->next, ip_idx++) {
3515 if (ip_idx < s_ip_idx)
3516 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003517 err = inet6_fill_ifmcaddr(skb, ifmca,
3518 NETLINK_CB(cb->skb).pid,
3519 cb->nlh->nlmsg_seq,
3520 RTM_GETMULTICAST,
3521 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003522 }
3523 break;
3524 case ANYCAST_ADDR:
3525 /* anycast address */
3526 for (ifaca = idev->ac_list; ifaca;
3527 ifaca = ifaca->aca_next, ip_idx++) {
3528 if (ip_idx < s_ip_idx)
3529 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003530 err = inet6_fill_ifacaddr(skb, ifaca,
3531 NETLINK_CB(cb->skb).pid,
3532 cb->nlh->nlmsg_seq,
3533 RTM_GETANYCAST,
3534 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003535 }
3536 break;
3537 default:
3538 break;
3539 }
3540 read_unlock_bh(&idev->lock);
3541 in6_dev_put(idev);
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003542
3543 if (err <= 0)
3544 break;
Pavel Emelianov7562f872007-05-03 15:13:45 -07003545cont:
3546 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548 cb->args[0] = idx;
3549 cb->args[1] = ip_idx;
3550 return skb->len;
3551}
3552
3553static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3554{
3555 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003556
Linus Torvalds1da177e2005-04-16 15:20:36 -07003557 return inet6_dump_addr(skb, cb, type);
3558}
3559
3560static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3561{
3562 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003563
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564 return inet6_dump_addr(skb, cb, type);
3565}
3566
3567
3568static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3569{
3570 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003571
Linus Torvalds1da177e2005-04-16 15:20:36 -07003572 return inet6_dump_addr(skb, cb, type);
3573}
3574
Thomas Graf1b29fc22006-09-18 00:10:50 -07003575static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3576 void *arg)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003577{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003578 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003579 struct ifaddrmsg *ifm;
3580 struct nlattr *tb[IFA_MAX+1];
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003581 struct in6_addr *addr = NULL;
3582 struct net_device *dev = NULL;
3583 struct inet6_ifaddr *ifa;
3584 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003585 int err;
3586
Thomas Graf1b29fc22006-09-18 00:10:50 -07003587 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3588 if (err < 0)
3589 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003590
Thomas Graf1b29fc22006-09-18 00:10:50 -07003591 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3592 if (addr == NULL) {
3593 err = -EINVAL;
3594 goto errout;
3595 }
3596
3597 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003598 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003599 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003600
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003601 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07003602 err = -EADDRNOTAVAIL;
3603 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003604 }
3605
Thomas Graf0ab68032006-09-18 00:12:35 -07003606 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07003607 err = -ENOBUFS;
3608 goto errout_ifa;
3609 }
3610
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003611 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3612 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003613 if (err < 0) {
3614 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3615 WARN_ON(err == -EMSGSIZE);
3616 kfree_skb(skb);
3617 goto errout_ifa;
3618 }
Benjamin Thery6fda7352008-03-05 10:47:47 -08003619 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003620errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003621 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003622errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003623 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003624}
3625
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3627{
3628 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003629 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07003630 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003631
Thomas Graf0ab68032006-09-18 00:12:35 -07003632 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07003633 if (skb == NULL)
3634 goto errout;
3635
3636 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003637 if (err < 0) {
3638 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3639 WARN_ON(err == -EMSGSIZE);
3640 kfree_skb(skb);
3641 goto errout;
3642 }
Benjamin Thery6fda7352008-03-05 10:47:47 -08003643 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07003644errout:
3645 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003646 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647}
3648
Dave Jonesb6f99a22007-03-22 12:27:49 -07003649static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003650 __s32 *array, int bytes)
3651{
Thomas Graf04561c12006-11-14 19:53:58 -08003652 BUG_ON(bytes < (DEVCONF_MAX * 4));
3653
Linus Torvalds1da177e2005-04-16 15:20:36 -07003654 memset(array, 0, bytes);
3655 array[DEVCONF_FORWARDING] = cnf->forwarding;
3656 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3657 array[DEVCONF_MTU6] = cnf->mtu6;
3658 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3659 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3660 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3661 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3662 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3663 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3664 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3665 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3666#ifdef CONFIG_IPV6_PRIVACY
3667 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3668 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3669 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3670 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3671 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3672#endif
3673 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08003674 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08003675 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08003676#ifdef CONFIG_IPV6_ROUTER_PREF
3677 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08003678 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
Neil Hormanfa03ef32007-01-30 14:30:10 -08003679#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08003680 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3681#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08003682#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07003683 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07003684 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07003685#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3686 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3687#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09003688#ifdef CONFIG_IPV6_MROUTE
3689 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3690#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09003691 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003692 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693}
3694
Thomas Graf339bf982006-11-10 14:10:15 -08003695static inline size_t inet6_if_nlmsg_size(void)
3696{
3697 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3698 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3699 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3700 + nla_total_size(4) /* IFLA_MTU */
3701 + nla_total_size(4) /* IFLA_LINK */
3702 + nla_total_size( /* IFLA_PROTINFO */
3703 nla_total_size(4) /* IFLA_INET6_FLAGS */
3704 + nla_total_size(sizeof(struct ifla_cacheinfo))
3705 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003706 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3707 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
Thomas Graf339bf982006-11-10 14:10:15 -08003708 );
3709}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003710
Herbert Xu7f7d9a62007-04-24 21:54:09 -07003711static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3712 int bytes)
3713{
3714 int i;
3715 int pad = bytes - sizeof(u64) * items;
3716 BUG_ON(pad < 0);
3717
3718 /* Use put_unaligned() because stats may not be aligned for u64. */
3719 put_unaligned(items, &stats[0]);
3720 for (i = 1; i < items; i++)
3721 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3722
3723 memset(&stats[items], 0, pad);
3724}
3725
3726static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3727 int bytes)
3728{
3729 switch(attrtype) {
3730 case IFLA_INET6_STATS:
3731 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3732 break;
3733 case IFLA_INET6_ICMP6STATS:
3734 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3735 break;
3736 }
3737}
3738
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003739static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003740 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741{
Thomas Graf04561c12006-11-14 19:53:58 -08003742 struct net_device *dev = idev->dev;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003743 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08003744 struct ifinfomsg *hdr;
3745 struct nlmsghdr *nlh;
3746 void *protoinfo;
3747 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003748
Thomas Graf04561c12006-11-14 19:53:58 -08003749 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3750 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003751 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752
Thomas Graf04561c12006-11-14 19:53:58 -08003753 hdr = nlmsg_data(nlh);
3754 hdr->ifi_family = AF_INET6;
3755 hdr->__ifi_pad = 0;
3756 hdr->ifi_type = dev->type;
3757 hdr->ifi_index = dev->ifindex;
3758 hdr->ifi_flags = dev_get_flags(dev);
3759 hdr->ifi_change = 0;
3760
3761 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003762
3763 if (dev->addr_len)
Thomas Graf04561c12006-11-14 19:53:58 -08003764 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765
Thomas Graf04561c12006-11-14 19:53:58 -08003766 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767 if (dev->ifindex != dev->iflink)
Thomas Graf04561c12006-11-14 19:53:58 -08003768 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003769
Thomas Graf04561c12006-11-14 19:53:58 -08003770 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3771 if (protoinfo == NULL)
3772 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003773
Thomas Graf04561c12006-11-14 19:53:58 -08003774 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003775
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776 ci.max_reasm_len = IPV6_MAXPLEN;
3777 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3778 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3779 ci.reachable_time = idev->nd_parms->reachable_time;
3780 ci.retrans_time = idev->nd_parms->retrans_time;
Thomas Graf04561c12006-11-14 19:53:58 -08003781 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3782
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003783 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3784 if (nla == NULL)
Thomas Graf04561c12006-11-14 19:53:58 -08003785 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003786 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003787
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003788 /* XXX - MC not implemented */
3789
3790 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3791 if (nla == NULL)
3792 goto nla_put_failure;
3793 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3794
3795 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3796 if (nla == NULL)
3797 goto nla_put_failure;
3798 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003799
Thomas Graf04561c12006-11-14 19:53:58 -08003800 nla_nest_end(skb, protoinfo);
3801 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802
Thomas Graf04561c12006-11-14 19:53:58 -08003803nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08003804 nlmsg_cancel(skb, nlh);
3805 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806}
3807
3808static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3809{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003810 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003811 int idx, err;
3812 int s_idx = cb->args[0];
3813 struct net_device *dev;
3814 struct inet6_dev *idev;
3815
3816 read_lock(&dev_base_lock);
Pavel Emelianov7562f872007-05-03 15:13:45 -07003817 idx = 0;
Benjamin Thery6fda7352008-03-05 10:47:47 -08003818 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003819 if (idx < s_idx)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003820 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003821 if ((idev = in6_dev_get(dev)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003822 goto cont;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003823 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003824 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003825 in6_dev_put(idev);
3826 if (err <= 0)
3827 break;
Pavel Emelianov7562f872007-05-03 15:13:45 -07003828cont:
3829 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003830 }
3831 read_unlock(&dev_base_lock);
3832 cb->args[0] = idx;
3833
3834 return skb->len;
3835}
3836
3837void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3838{
3839 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003840 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003841 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003842
Thomas Graf339bf982006-11-10 14:10:15 -08003843 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003844 if (skb == NULL)
3845 goto errout;
3846
3847 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003848 if (err < 0) {
3849 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3850 WARN_ON(err == -EMSGSIZE);
3851 kfree_skb(skb);
3852 goto errout;
3853 }
Benjamin Thery6fda7352008-03-05 10:47:47 -08003854 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003855errout:
3856 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003857 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858}
3859
Thomas Graf339bf982006-11-10 14:10:15 -08003860static inline size_t inet6_prefix_nlmsg_size(void)
3861{
3862 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3863 + nla_total_size(sizeof(struct in6_addr))
3864 + nla_total_size(sizeof(struct prefix_cacheinfo));
3865}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003866
Linus Torvalds1da177e2005-04-16 15:20:36 -07003867static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Thomas Graf6051e2f2006-11-14 19:54:19 -08003868 struct prefix_info *pinfo, u32 pid, u32 seq,
3869 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003870{
Thomas Graf6051e2f2006-11-14 19:54:19 -08003871 struct prefixmsg *pmsg;
3872 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873 struct prefix_cacheinfo ci;
3874
Thomas Graf6051e2f2006-11-14 19:54:19 -08003875 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3876 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003877 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08003878
3879 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07003881 pmsg->prefix_pad1 = 0;
3882 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003883 pmsg->prefix_ifindex = idev->dev->ifindex;
3884 pmsg->prefix_len = pinfo->prefix_len;
3885 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07003886 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887 pmsg->prefix_flags = 0;
3888 if (pinfo->onlink)
3889 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3890 if (pinfo->autoconf)
3891 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3892
Thomas Graf6051e2f2006-11-14 19:54:19 -08003893 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003894
3895 ci.preferred_time = ntohl(pinfo->prefered);
3896 ci.valid_time = ntohl(pinfo->valid);
Thomas Graf6051e2f2006-11-14 19:54:19 -08003897 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003898
Thomas Graf6051e2f2006-11-14 19:54:19 -08003899 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003900
Thomas Graf6051e2f2006-11-14 19:54:19 -08003901nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08003902 nlmsg_cancel(skb, nlh);
3903 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003904}
3905
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003906static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003907 struct prefix_info *pinfo)
3908{
3909 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003910 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003911 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912
Thomas Graf339bf982006-11-10 14:10:15 -08003913 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003914 if (skb == NULL)
3915 goto errout;
3916
3917 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003918 if (err < 0) {
3919 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3920 WARN_ON(err == -EMSGSIZE);
3921 kfree_skb(skb);
3922 goto errout;
3923 }
Benjamin Thery6fda7352008-03-05 10:47:47 -08003924 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003925errout:
3926 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003927 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003928}
3929
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3931{
3932 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3933
3934 switch (event) {
3935 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07003936 /*
3937 * If the address was optimistic
3938 * we inserted the route at the start of
3939 * our DAD process, so we don't need
3940 * to do it again
3941 */
3942 if (!(ifp->rt->rt6i_node))
3943 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944 if (ifp->idev->cnf.forwarding)
3945 addrconf_join_anycast(ifp);
3946 break;
3947 case RTM_DELADDR:
3948 if (ifp->idev->cnf.forwarding)
3949 addrconf_leave_anycast(ifp);
3950 addrconf_leave_solict(ifp->idev, &ifp->addr);
3951 dst_hold(&ifp->rt->u.dst);
Thomas Grafe0a1ad732006-08-22 00:00:21 -07003952 if (ip6_del_rt(ifp->rt))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953 dst_free(&ifp->rt->u.dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954 break;
3955 }
3956}
3957
3958static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3959{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003960 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003961 if (likely(ifp->idev->dead == 0))
3962 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003963 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003964}
3965
3966#ifdef CONFIG_SYSCTL
3967
3968static
3969int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3970 void __user *buffer, size_t *lenp, loff_t *ppos)
3971{
3972 int *valp = ctl->data;
3973 int val = *valp;
3974 int ret;
3975
3976 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3977
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08003978 if (write)
3979 addrconf_fixup_forwarding(ctl, valp, val);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003980 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003981}
3982
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003983static int addrconf_sysctl_forward_strategy(ctl_table *table,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984 void __user *oldval,
3985 size_t __user *oldlenp,
Alexey Dobriyan1f29bcd2006-12-10 02:19:10 -08003986 void __user *newval, size_t newlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003987{
3988 int *valp = table->data;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08003989 int val = *valp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003990 int new;
3991
3992 if (!newval || !newlen)
3993 return 0;
3994 if (newlen != sizeof(int))
3995 return -EINVAL;
3996 if (get_user(new, (int __user *)newval))
3997 return -EFAULT;
3998 if (new == *valp)
3999 return 0;
4000 if (oldval && oldlenp) {
4001 size_t len;
4002 if (get_user(len, oldlenp))
4003 return -EFAULT;
4004 if (len) {
4005 if (len > table->maxlen)
4006 len = table->maxlen;
4007 if (copy_to_user(oldval, valp, len))
4008 return -EFAULT;
4009 if (put_user(len, oldlenp))
4010 return -EFAULT;
4011 }
4012 }
4013
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004014 *valp = new;
4015 addrconf_fixup_forwarding(table, valp, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004016 return 1;
4017}
4018
4019static struct addrconf_sysctl_table
4020{
4021 struct ctl_table_header *sysctl_header;
YOSHIFUJI Hideakif6a07b22008-03-25 00:25:11 +09004022 ctl_table addrconf_vars[DEVCONF_MAX+1];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004023 char *dev_name;
Brian Haleyab32ea52006-09-22 14:15:41 -07004024} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004025 .sysctl_header = NULL,
4026 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004027 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004028 .ctl_name = NET_IPV6_FORWARDING,
4029 .procname = "forwarding",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004030 .data = &ipv6_devconf.forwarding,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004031 .maxlen = sizeof(int),
4032 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004033 .proc_handler = &addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004034 .strategy = &addrconf_sysctl_forward_strategy,
4035 },
4036 {
4037 .ctl_name = NET_IPV6_HOP_LIMIT,
4038 .procname = "hop_limit",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004039 .data = &ipv6_devconf.hop_limit,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004040 .maxlen = sizeof(int),
4041 .mode = 0644,
4042 .proc_handler = proc_dointvec,
4043 },
4044 {
4045 .ctl_name = NET_IPV6_MTU,
4046 .procname = "mtu",
4047 .data = &ipv6_devconf.mtu6,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004048 .maxlen = sizeof(int),
Linus Torvalds1da177e2005-04-16 15:20:36 -07004049 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004050 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004051 },
4052 {
4053 .ctl_name = NET_IPV6_ACCEPT_RA,
4054 .procname = "accept_ra",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004055 .data = &ipv6_devconf.accept_ra,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004056 .maxlen = sizeof(int),
4057 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004058 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004059 },
4060 {
4061 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4062 .procname = "accept_redirects",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004063 .data = &ipv6_devconf.accept_redirects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004064 .maxlen = sizeof(int),
4065 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004066 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004067 },
4068 {
4069 .ctl_name = NET_IPV6_AUTOCONF,
4070 .procname = "autoconf",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004071 .data = &ipv6_devconf.autoconf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004072 .maxlen = sizeof(int),
4073 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004074 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075 },
4076 {
4077 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4078 .procname = "dad_transmits",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004079 .data = &ipv6_devconf.dad_transmits,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080 .maxlen = sizeof(int),
4081 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004082 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004083 },
4084 {
4085 .ctl_name = NET_IPV6_RTR_SOLICITS,
4086 .procname = "router_solicitations",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004087 .data = &ipv6_devconf.rtr_solicits,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088 .maxlen = sizeof(int),
4089 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004090 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004091 },
4092 {
4093 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4094 .procname = "router_solicitation_interval",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004095 .data = &ipv6_devconf.rtr_solicit_interval,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004096 .maxlen = sizeof(int),
4097 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004098 .proc_handler = &proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004099 .strategy = &sysctl_jiffies,
4100 },
4101 {
4102 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4103 .procname = "router_solicitation_delay",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004104 .data = &ipv6_devconf.rtr_solicit_delay,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004105 .maxlen = sizeof(int),
4106 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004107 .proc_handler = &proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108 .strategy = &sysctl_jiffies,
4109 },
4110 {
4111 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4112 .procname = "force_mld_version",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004113 .data = &ipv6_devconf.force_mld_version,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004114 .maxlen = sizeof(int),
4115 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004116 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117 },
4118#ifdef CONFIG_IPV6_PRIVACY
4119 {
4120 .ctl_name = NET_IPV6_USE_TEMPADDR,
4121 .procname = "use_tempaddr",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004122 .data = &ipv6_devconf.use_tempaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004123 .maxlen = sizeof(int),
4124 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004125 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004126 },
4127 {
4128 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4129 .procname = "temp_valid_lft",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004130 .data = &ipv6_devconf.temp_valid_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004131 .maxlen = sizeof(int),
4132 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004133 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004134 },
4135 {
4136 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4137 .procname = "temp_prefered_lft",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004138 .data = &ipv6_devconf.temp_prefered_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004139 .maxlen = sizeof(int),
4140 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004141 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004142 },
4143 {
4144 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4145 .procname = "regen_max_retry",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004146 .data = &ipv6_devconf.regen_max_retry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004147 .maxlen = sizeof(int),
4148 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004149 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004150 },
4151 {
4152 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4153 .procname = "max_desync_factor",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004154 .data = &ipv6_devconf.max_desync_factor,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004155 .maxlen = sizeof(int),
4156 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004157 .proc_handler = &proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004158 },
4159#endif
4160 {
4161 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4162 .procname = "max_addresses",
4163 .data = &ipv6_devconf.max_addresses,
4164 .maxlen = sizeof(int),
4165 .mode = 0644,
4166 .proc_handler = &proc_dointvec,
4167 },
4168 {
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004169 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4170 .procname = "accept_ra_defrtr",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004171 .data = &ipv6_devconf.accept_ra_defrtr,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004172 .maxlen = sizeof(int),
4173 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004174 .proc_handler = &proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004175 },
4176 {
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004177 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4178 .procname = "accept_ra_pinfo",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004179 .data = &ipv6_devconf.accept_ra_pinfo,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004180 .maxlen = sizeof(int),
4181 .mode = 0644,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004182 .proc_handler = &proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004183 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004184#ifdef CONFIG_IPV6_ROUTER_PREF
4185 {
4186 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4187 .procname = "accept_ra_rtr_pref",
4188 .data = &ipv6_devconf.accept_ra_rtr_pref,
4189 .maxlen = sizeof(int),
4190 .mode = 0644,
4191 .proc_handler = &proc_dointvec,
4192 },
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004193 {
4194 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4195 .procname = "router_probe_interval",
4196 .data = &ipv6_devconf.rtr_probe_interval,
4197 .maxlen = sizeof(int),
4198 .mode = 0644,
4199 .proc_handler = &proc_dointvec_jiffies,
4200 .strategy = &sysctl_jiffies,
4201 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08004202#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004203 {
4204 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4205 .procname = "accept_ra_rt_info_max_plen",
4206 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4207 .maxlen = sizeof(int),
4208 .mode = 0644,
4209 .proc_handler = &proc_dointvec,
4210 },
4211#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004212#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004213 {
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004214 .ctl_name = NET_IPV6_PROXY_NDP,
4215 .procname = "proxy_ndp",
4216 .data = &ipv6_devconf.proxy_ndp,
4217 .maxlen = sizeof(int),
4218 .mode = 0644,
4219 .proc_handler = &proc_dointvec,
4220 },
4221 {
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004222 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4223 .procname = "accept_source_route",
4224 .data = &ipv6_devconf.accept_source_route,
4225 .maxlen = sizeof(int),
4226 .mode = 0644,
4227 .proc_handler = &proc_dointvec,
4228 },
Neil Horman95c385b2007-04-25 17:08:10 -07004229#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4230 {
4231 .ctl_name = CTL_UNNUMBERED,
4232 .procname = "optimistic_dad",
4233 .data = &ipv6_devconf.optimistic_dad,
4234 .maxlen = sizeof(int),
4235 .mode = 0644,
4236 .proc_handler = &proc_dointvec,
4237
4238 },
4239#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004240#ifdef CONFIG_IPV6_MROUTE
4241 {
4242 .ctl_name = CTL_UNNUMBERED,
4243 .procname = "mc_forwarding",
4244 .data = &ipv6_devconf.mc_forwarding,
4245 .maxlen = sizeof(int),
4246 .mode = 0644,
4247 .proc_handler = &proc_dointvec,
4248 },
4249#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004250 {
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004251 .ctl_name = CTL_UNNUMBERED,
4252 .procname = "disable_ipv6",
4253 .data = &ipv6_devconf.disable_ipv6,
4254 .maxlen = sizeof(int),
4255 .mode = 0644,
4256 .proc_handler = &proc_dointvec,
4257 },
4258 {
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004259 .ctl_name = CTL_UNNUMBERED,
4260 .procname = "accept_dad",
4261 .data = &ipv6_devconf.accept_dad,
4262 .maxlen = sizeof(int),
4263 .mode = 0644,
4264 .proc_handler = &proc_dointvec,
4265 },
4266 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004267 .ctl_name = 0, /* sentinel */
4268 }
4269 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270};
4271
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004272static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4273 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004274{
4275 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004276 struct addrconf_sysctl_table *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004277
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004278#define ADDRCONF_CTL_PATH_DEV 3
4279
4280 struct ctl_path addrconf_ctl_path[] = {
4281 { .procname = "net", .ctl_name = CTL_NET, },
4282 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4283 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4284 { /* to be set */ },
4285 { },
4286 };
4287
4288
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02004289 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004290 if (t == NULL)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004291 goto out;
4292
Linus Torvalds1da177e2005-04-16 15:20:36 -07004293 for (i=0; t->addrconf_vars[i].data; i++) {
4294 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004295 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004296 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004298
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004299 /*
4300 * Make a copy of dev_name, because '.procname' is regarded as const
Linus Torvalds1da177e2005-04-16 15:20:36 -07004301 * by sysctl and we wouldn't want anyone to change it under our feet
4302 * (see SIOCSIFNAME).
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004303 */
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004304 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4305 if (!t->dev_name)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004306 goto free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004307
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004308 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4309 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004310
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004311 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004312 t->addrconf_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313 if (t->sysctl_header == NULL)
4314 goto free_procname;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004315
4316 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08004317 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004318
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004319free_procname:
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004320 kfree(t->dev_name);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004321free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004323out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08004324 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325}
4326
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004327static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4328{
4329 struct addrconf_sysctl_table *t;
4330
4331 if (p->sysctl == NULL)
4332 return;
4333
4334 t = p->sysctl;
4335 p->sysctl = NULL;
4336 unregister_sysctl_table(t->sysctl_header);
4337 kfree(t->dev_name);
4338 kfree(t);
4339}
4340
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004341static void addrconf_sysctl_register(struct inet6_dev *idev)
4342{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004343 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4344 NET_IPV6_NEIGH, "ipv6",
4345 &ndisc_ifinfo_sysctl_change,
YOSHIFUJI Hideaki0686caa2008-05-19 16:25:42 -07004346 ndisc_ifinfo_sysctl_strategy);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004347 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004348 idev->dev->ifindex, idev, &idev->cnf);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004349}
4350
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004351static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004352{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004353 __addrconf_sysctl_unregister(&idev->cnf);
4354 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004355}
4356
4357
4358#endif
4359
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004360static int addrconf_init_net(struct net *net)
4361{
4362 int err;
4363 struct ipv6_devconf *all, *dflt;
4364
4365 err = -ENOMEM;
4366 all = &ipv6_devconf;
4367 dflt = &ipv6_devconf_dflt;
4368
4369 if (net != &init_net) {
4370 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4371 if (all == NULL)
4372 goto err_alloc_all;
4373
4374 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4375 if (dflt == NULL)
4376 goto err_alloc_dflt;
4377 }
4378
4379 net->ipv6.devconf_all = all;
4380 net->ipv6.devconf_dflt = dflt;
4381
4382#ifdef CONFIG_SYSCTL
4383 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4384 NULL, all);
4385 if (err < 0)
4386 goto err_reg_all;
4387
4388 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4389 NULL, dflt);
4390 if (err < 0)
4391 goto err_reg_dflt;
4392#endif
4393 return 0;
4394
4395#ifdef CONFIG_SYSCTL
4396err_reg_dflt:
4397 __addrconf_sysctl_unregister(all);
4398err_reg_all:
4399 kfree(dflt);
4400#endif
4401err_alloc_dflt:
4402 kfree(all);
4403err_alloc_all:
4404 return err;
4405}
4406
4407static void addrconf_exit_net(struct net *net)
4408{
4409#ifdef CONFIG_SYSCTL
4410 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4411 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4412#endif
4413 if (net != &init_net) {
4414 kfree(net->ipv6.devconf_dflt);
4415 kfree(net->ipv6.devconf_all);
4416 }
4417}
4418
4419static struct pernet_operations addrconf_ops = {
4420 .init = addrconf_init_net,
4421 .exit = addrconf_exit_net,
4422};
4423
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424/*
4425 * Device notifier
4426 */
4427
4428int register_inet6addr_notifier(struct notifier_block *nb)
4429{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004430 return atomic_notifier_chain_register(&inet6addr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004431}
4432
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09004433EXPORT_SYMBOL(register_inet6addr_notifier);
4434
Linus Torvalds1da177e2005-04-16 15:20:36 -07004435int unregister_inet6addr_notifier(struct notifier_block *nb)
4436{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004437 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004438}
4439
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09004440EXPORT_SYMBOL(unregister_inet6addr_notifier);
4441
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004442static void addrconf_net_exit(struct net *net)
4443{
Benjamin Thery6fda7352008-03-05 10:47:47 -08004444 struct net_device *dev;
4445
Benjamin Thery6fda7352008-03-05 10:47:47 -08004446 rtnl_lock();
4447 /* clean dev list */
4448 for_each_netdev(net, dev) {
4449 if (__in6_dev_get(dev) == NULL)
4450 continue;
4451 addrconf_ifdown(dev, 1);
4452 }
4453 addrconf_ifdown(net->loopback_dev, 2);
4454 rtnl_unlock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004455}
4456
4457static struct pernet_operations addrconf_net_ops = {
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004458 .exit = addrconf_net_exit,
4459};
4460
Linus Torvalds1da177e2005-04-16 15:20:36 -07004461/*
4462 * Init / cleanup code
4463 */
4464
4465int __init addrconf_init(void)
4466{
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09004467 int err;
4468
4469 if ((err = ipv6_addr_label_init()) < 0) {
4470 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4471 err);
4472 return err;
4473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004474
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004475 register_pernet_subsys(&addrconf_ops);
4476
Linus Torvalds1da177e2005-04-16 15:20:36 -07004477 /* The addrconf netdev notifier requires that loopback_dev
4478 * has it's ipv6 private information allocated and setup
4479 * before it can bring up and give link-local addresses
4480 * to other devices which are up.
4481 *
4482 * Unfortunately, loopback_dev is not necessarily the first
4483 * entry in the global dev_base list of net devices. In fact,
4484 * it is likely to be the very last entry on that list.
4485 * So this causes the notifier registry below to try and
4486 * give link-local addresses to all devices besides loopback_dev
4487 * first, then loopback_dev, which cases all the non-loopback_dev
4488 * devices to fail to get a link-local address.
4489 *
4490 * So, as a temporary fix, allocate the ipv6 structure for
4491 * loopback_dev first by hand.
4492 * Longer term, all of the dependencies ipv6 has upon the loopback
4493 * device and it being up should be removed.
4494 */
4495 rtnl_lock();
Eric W. Biederman2774c7a2007-09-26 22:10:56 -07004496 if (!ipv6_add_dev(init_net.loopback_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004497 err = -ENOMEM;
4498 rtnl_unlock();
4499 if (err)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004500 goto errlo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004501
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004502 err = register_pernet_device(&addrconf_net_ops);
4503 if (err)
4504 return err;
4505
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 register_netdevice_notifier(&ipv6_dev_notf);
4507
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508 addrconf_verify(0);
Thomas Grafc127ea22007-03-22 11:58:32 -07004509
4510 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4511 if (err < 0)
4512 goto errout;
4513
4514 /* Only the first call to __rtnl_register can fail */
4515 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4516 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4517 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4518 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4519 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4520
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09004521 ipv6_addr_label_rtnl_register();
4522
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07004524errout:
4525 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004526errlo:
4527 unregister_pernet_subsys(&addrconf_ops);
Thomas Grafc127ea22007-03-22 11:58:32 -07004528
4529 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530}
4531
Daniel Lezcano09f77092007-12-13 05:34:58 -08004532void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004533{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004534 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535 int i;
4536
4537 unregister_netdevice_notifier(&ipv6_dev_notf);
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004538 unregister_pernet_device(&addrconf_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004540 unregister_pernet_subsys(&addrconf_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004541
4542 rtnl_lock();
4543
4544 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004545 * Check hash table.
4546 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004547 write_lock_bh(&addrconf_hash_lock);
4548 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4549 for (ifa=inet6_addr_lst[i]; ifa; ) {
4550 struct inet6_ifaddr *bifa;
4551
4552 bifa = ifa;
4553 ifa = ifa->lst_next;
4554 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4555 /* Do not free it; something is wrong.
4556 Now we can investigate it with debugger.
4557 */
4558 }
4559 }
4560 write_unlock_bh(&addrconf_hash_lock);
4561
4562 del_timer(&addr_chk_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004563 rtnl_unlock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004564
4565 unregister_pernet_subsys(&addrconf_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004566}