blob: 55f486d89c88eeb1d3e1409cd115cf996c9a8b07 [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>
Ilpo Järvinena0bffff2009-03-21 13:36:17 -070043#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/socket.h>
45#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/net.h>
47#include <linux/in6.h>
48#include <linux/netdevice.h>
Thomas Graf18237302006-08-04 23:04:54 -070049#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/if_arp.h>
51#include <linux/if_arcnet.h>
52#include <linux/if_infiniband.h>
53#include <linux/route.h>
54#include <linux/inetdevice.h>
55#include <linux/init.h>
56#ifdef CONFIG_SYSCTL
57#include <linux/sysctl.h>
58#endif
Randy Dunlap4fc268d2006-01-11 12:17:47 -080059#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <linux/delay.h>
61#include <linux/notifier.h>
Paulo Marques543537b2005-06-23 00:09:02 -070062#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020064#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <net/sock.h>
66#include <net/snmp.h>
67
68#include <net/ipv6.h>
69#include <net/protocol.h>
70#include <net/ndisc.h>
71#include <net/ip6_route.h>
72#include <net/addrconf.h>
73#include <net/tcp.h>
74#include <net/ip.h>
Thomas Graf5d620262006-08-15 00:35:02 -070075#include <net/netlink.h>
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -070076#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#include <linux/if_tunnel.h>
78#include <linux/rtnetlink.h>
79
80#ifdef CONFIG_IPV6_PRIVACY
81#include <linux/random.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#endif
83
84#include <asm/uaccess.h>
Herbert Xu7f7d9a62007-04-24 21:54:09 -070085#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87#include <linux/proc_fs.h>
88#include <linux/seq_file.h>
89
90/* Set to 3 to get tracing... */
91#define ACONF_DEBUG 2
92
93#if ACONF_DEBUG >= 3
94#define ADBG(x) printk x
95#else
96#define ADBG(x)
97#endif
98
99#define INFINITY_LIFE_TIME 0xFFFFFFFF
100#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101
102#ifdef CONFIG_SYSCTL
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100103static void addrconf_sysctl_register(struct inet6_dev *idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800104static void addrconf_sysctl_unregister(struct inet6_dev *idev);
105#else
106static inline void addrconf_sysctl_register(struct inet6_dev *idev)
107{
108}
109
110static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
111{
112}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113#endif
114
115#ifdef CONFIG_IPV6_PRIVACY
116static int __ipv6_regen_rndid(struct inet6_dev *idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900117static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static void ipv6_regen_rndid(unsigned long data);
119
120static int desync_factor = MAX_DESYNC_FACTOR * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#endif
122
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900123static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124static int ipv6_count_addresses(struct inet6_dev *idev);
125
126/*
127 * Configured unicast address hash table
128 */
129static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130static DEFINE_RWLOCK(addrconf_hash_lock);
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132static void addrconf_verify(unsigned long);
133
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700134static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135static DEFINE_SPINLOCK(addrconf_verify_lock);
136
137static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139
Moni Shoua75c78502009-09-15 02:37:40 -0700140static void addrconf_bonding_change(struct net_device *dev,
141 unsigned long event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static int addrconf_ifdown(struct net_device *dev, int how);
143
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -0700144static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145static void addrconf_dad_timer(unsigned long data);
146static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900147static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148static void addrconf_rs_timer(unsigned long data);
149static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
150static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
151
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900152static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 struct prefix_info *pinfo);
Daniel Lezcano06bfe652008-01-10 22:43:42 -0800154static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
155 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Alan Sterne041c682006-03-27 01:16:30 -0800157static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Adrian Bunk888c8482008-07-22 14:21:58 -0700159static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .forwarding = 0,
161 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
162 .mtu6 = IPV6_MIN_MTU,
163 .accept_ra = 1,
164 .accept_redirects = 1,
165 .autoconf = 1,
166 .force_mld_version = 0,
167 .dad_transmits = 1,
168 .rtr_solicits = MAX_RTR_SOLICITATIONS,
169 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
170 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
171#ifdef CONFIG_IPV6_PRIVACY
172 .use_tempaddr = 0,
173 .temp_valid_lft = TEMP_VALID_LIFETIME,
174 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
175 .regen_max_retry = REGEN_MAX_RETRY,
176 .max_desync_factor = MAX_DESYNC_FACTOR,
177#endif
178 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800179 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800180 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800181#ifdef CONFIG_IPV6_ROUTER_PREF
182 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800183 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800184#ifdef CONFIG_IPV6_ROUTE_INFO
185 .accept_ra_rt_info_max_plen = 0,
186#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800187#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700188 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700189 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900190 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900191 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192};
193
Brian Haleyab32ea52006-09-22 14:15:41 -0700194static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .forwarding = 0,
196 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
197 .mtu6 = IPV6_MIN_MTU,
198 .accept_ra = 1,
199 .accept_redirects = 1,
200 .autoconf = 1,
201 .dad_transmits = 1,
202 .rtr_solicits = MAX_RTR_SOLICITATIONS,
203 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
204 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
205#ifdef CONFIG_IPV6_PRIVACY
206 .use_tempaddr = 0,
207 .temp_valid_lft = TEMP_VALID_LIFETIME,
208 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
209 .regen_max_retry = REGEN_MAX_RETRY,
210 .max_desync_factor = MAX_DESYNC_FACTOR,
211#endif
212 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800213 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800214 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800215#ifdef CONFIG_IPV6_ROUTER_PREF
216 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800217 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800218#ifdef CONFIG_IPV6_ROUTE_INFO
219 .accept_ra_rt_info_max_plen = 0,
220#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800221#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700222 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700223 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900224 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900225 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226};
227
228/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900231const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
232const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700234/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700235static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700236{
David S. Miller05297942008-07-08 23:01:27 -0700237 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700238}
239
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +0900240/* Check if a route is valid prefix route */
241static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
242{
243 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
244}
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246static void addrconf_del_timer(struct inet6_ifaddr *ifp)
247{
248 if (del_timer(&ifp->timer))
249 __in6_ifa_put(ifp);
250}
251
252enum addrconf_timer_t
253{
254 AC_NONE,
255 AC_DAD,
256 AC_RS,
257};
258
259static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
260 enum addrconf_timer_t what,
261 unsigned long when)
262{
263 if (!del_timer(&ifp->timer))
264 in6_ifa_hold(ifp);
265
266 switch (what) {
267 case AC_DAD:
268 ifp->timer.function = addrconf_dad_timer;
269 break;
270 case AC_RS:
271 ifp->timer.function = addrconf_rs_timer;
272 break;
273 default:;
274 }
275 ifp->timer.expires = jiffies + when;
276 add_timer(&ifp->timer);
277}
278
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700279static int snmp6_alloc_dev(struct inet6_dev *idev)
280{
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700281 if (snmp_mib_init((void **)idev->stats.ipv6,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800282 sizeof(struct ipstats_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700283 goto err_ip;
284 if (snmp_mib_init((void **)idev->stats.icmpv6,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800285 sizeof(struct icmpv6_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700286 goto err_icmp;
David L Stevens14878f72007-09-16 16:52:35 -0700287 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
YOSHIFUJI Hideakic69bce22008-01-23 22:31:45 -0800288 sizeof(struct icmpv6msg_mib)) < 0)
David L Stevens14878f72007-09-16 16:52:35 -0700289 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700290
291 return 0;
292
David L Stevens14878f72007-09-16 16:52:35 -0700293err_icmpmsg:
294 snmp_mib_free((void **)idev->stats.icmpv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700295err_icmp:
296 snmp_mib_free((void **)idev->stats.ipv6);
297err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700298 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700299}
300
Pavel Emelyanov16910b92007-10-17 21:23:43 -0700301static void snmp6_free_dev(struct inet6_dev *idev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700302{
David L Stevens14878f72007-09-16 16:52:35 -0700303 snmp_mib_free((void **)idev->stats.icmpv6msg);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700304 snmp_mib_free((void **)idev->stats.icmpv6);
305 snmp_mib_free((void **)idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700306}
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308/* Nobody refers to this device, we may destroy it. */
309
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700310static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
311{
312 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
313 kfree(idev);
314}
315
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316void in6_dev_finish_destroy(struct inet6_dev *idev)
317{
318 struct net_device *dev = idev->dev;
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700319
320 WARN_ON(idev->addr_list != NULL);
321 WARN_ON(idev->mc_list != NULL);
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323#ifdef NET_REFCNT_DEBUG
324 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
325#endif
326 dev_put(dev);
327 if (!idev->dead) {
328 printk("Freeing alive inet6 device %p\n", idev);
329 return;
330 }
331 snmp6_free_dev(idev);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700332 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333}
334
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900335EXPORT_SYMBOL(in6_dev_finish_destroy);
336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
338{
339 struct inet6_dev *ndev;
340
341 ASSERT_RTNL();
342
343 if (dev->mtu < IPV6_MIN_MTU)
344 return NULL;
345
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900346 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900348 if (ndev == NULL)
349 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Ingo Oeser322f74a2006-03-20 23:01:47 -0800351 rwlock_init(&ndev->lock);
352 ndev->dev = dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900353 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800354 ndev->cnf.mtu6 = dev->mtu;
355 ndev->cnf.sysctl = NULL;
356 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
357 if (ndev->nd_parms == NULL) {
358 kfree(ndev);
359 return NULL;
360 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700361 if (ndev->cnf.forwarding)
362 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800363 /* We refer to the device */
364 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Ingo Oeser322f74a2006-03-20 23:01:47 -0800366 if (snmp6_alloc_dev(ndev) < 0) {
367 ADBG((KERN_WARNING
368 "%s(): cannot allocate memory for statistics; dev=%s.\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800369 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800370 neigh_parms_release(&nd_tbl, ndev->nd_parms);
371 ndev->dead = 1;
372 in6_dev_finish_destroy(ndev);
373 return NULL;
374 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Ingo Oeser322f74a2006-03-20 23:01:47 -0800376 if (snmp6_register_dev(ndev) < 0) {
377 ADBG((KERN_WARNING
378 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800379 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800380 neigh_parms_release(&nd_tbl, ndev->nd_parms);
381 ndev->dead = 1;
382 in6_dev_finish_destroy(ndev);
383 return NULL;
384 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Ingo Oeser322f74a2006-03-20 23:01:47 -0800386 /* One reference from device. We must do this before
387 * we invoke __ipv6_regen_rndid().
388 */
389 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900391 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
392 ndev->cnf.accept_dad = -1;
393
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700394#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
395 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
396 printk(KERN_INFO
397 "%s: Disabled Multicast RS\n",
398 dev->name);
399 ndev->cnf.rtr_solicits = 0;
400 }
401#endif
402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403#ifdef CONFIG_IPV6_PRIVACY
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800404 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800405 if ((dev->flags&IFF_LOOPBACK) ||
406 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700407 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700408 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700409 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800410 printk(KERN_INFO
411 "%s: Disabled Privacy Extensions\n",
412 dev->name);
413 ndev->cnf.use_tempaddr = -1;
414 } else {
415 in6_dev_hold(ndev);
416 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 }
Ingo Oeser322f74a2006-03-20 23:01:47 -0800418#endif
419
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700420 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700421 ndev->if_flags |= IF_READY;
422
Ingo Oeser322f74a2006-03-20 23:01:47 -0800423 ipv6_mc_init_dev(ndev);
424 ndev->tstamp = jiffies;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100425 addrconf_sysctl_register(ndev);
David L Stevens30c4cf52007-01-04 12:31:14 -0800426 /* protected by rtnl_lock */
427 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800428
429 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900430 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 return ndev;
433}
434
YOSHIFUJI Hideakicee89472008-04-13 23:21:16 -0700435static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 struct inet6_dev *idev;
438
439 ASSERT_RTNL();
440
441 if ((idev = __in6_dev_get(dev)) == NULL) {
442 if ((idev = ipv6_add_dev(dev)) == NULL)
443 return NULL;
444 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 if (dev->flags&IFF_UP)
447 ipv6_mc_up(idev);
448 return idev;
449}
450
451#ifdef CONFIG_SYSCTL
452static void dev_forward_change(struct inet6_dev *idev)
453{
454 struct net_device *dev;
455 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 if (!idev)
458 return;
459 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700460 if (idev->cnf.forwarding)
461 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (dev && (dev->flags & IFF_MULTICAST)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 if (idev->cnf.forwarding)
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900464 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 else
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900466 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 }
468 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800469 if (ifa->flags&IFA_F_TENTATIVE)
470 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if (idev->cnf.forwarding)
472 addrconf_join_anycast(ifa);
473 else
474 addrconf_leave_anycast(ifa);
475 }
476}
477
478
Pavel Emelyanove1869322008-01-10 17:43:50 -0800479static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
481 struct net_device *dev;
482 struct inet6_dev *idev;
483
484 read_lock(&dev_base_lock);
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800485 for_each_netdev(net, dev) {
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700486 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 idev = __in6_dev_get(dev);
488 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800489 int changed = (!idev->cnf.forwarding) ^ (!newf);
490 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 if (changed)
492 dev_forward_change(idev);
493 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700494 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
496 read_unlock(&dev_base_lock);
497}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800498
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000499static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800500{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800501 struct net *net;
502
503 net = (struct net *)table->extra2;
Pavel Emelyanov441fc2a2008-01-10 17:43:22 -0800504 if (p == &net->ipv6.devconf_dflt->forwarding)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000505 return 0;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800506
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000507 if (!rtnl_trylock())
Eric W. Biederman50073922009-05-13 16:58:17 +0000508 return restart_syscall();
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000509
Pavel Emelyanove1869322008-01-10 17:43:50 -0800510 if (p == &net->ipv6.devconf_all->forwarding) {
511 __s32 newf = net->ipv6.devconf_all->forwarding;
512 net->ipv6.devconf_dflt->forwarding = newf;
513 addrconf_forward_change(net, newf);
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800514 } else if ((!*p) ^ (!old))
515 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700516 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800517
518 if (*p)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800519 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000520 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800521}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522#endif
523
524/* Nobody refers to this ifaddr, destroy it */
525
526void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
527{
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700528 WARN_ON(ifp->if_next != NULL);
529 WARN_ON(ifp->lst_next != NULL);
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531#ifdef NET_REFCNT_DEBUG
532 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
533#endif
534
535 in6_dev_put(ifp->idev);
536
537 if (del_timer(&ifp->timer))
538 printk("Timer is still running, when freeing ifa=%p\n", ifp);
539
540 if (!ifp->dead) {
541 printk("Freeing alive inet6 address %p\n", ifp);
542 return;
543 }
544 dst_release(&ifp->rt->u.dst);
545
546 kfree(ifp);
547}
548
Brian Haleye55ffac2006-07-10 15:25:51 -0700549static void
550ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
551{
552 struct inet6_ifaddr *ifa, **ifap;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700553 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700554
555 /*
556 * Each device address list is sorted in order of scope -
557 * global before linklocal.
558 */
559 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
560 ifap = &ifa->if_next) {
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700561 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700562 break;
563 }
564
565 ifp->if_next = *ifap;
566 *ifap = ifp;
567}
568
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900569/*
570 * Hash function taken from net_alias.c
571 */
572static u8 ipv6_addr_hash(const struct in6_addr *addr)
573{
574 __u32 word;
575
576 /*
577 * We perform the hash function over the last 64 bits of the address
578 * This will include the IEEE address token on links that support it.
579 */
580
581 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
582 word ^= (word >> 16);
583 word ^= (word >> 8);
584
585 return ((word ^ (word >> 4)) & 0x0f);
586}
587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588/* On success it returns ifp with increased reference count */
589
590static struct inet6_ifaddr *
591ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -0700592 int scope, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593{
594 struct inet6_ifaddr *ifa = NULL;
595 struct rt6_info *rt;
596 int hash;
597 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900598 int addr_type = ipv6_addr_type(addr);
599
600 if (addr_type == IPV6_ADDR_ANY ||
601 addr_type & IPV6_ADDR_MULTICAST ||
602 (!(idev->dev->flags & IFF_LOOPBACK) &&
603 addr_type & IPV6_ADDR_LOOPBACK))
604 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700606 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 if (idev->dead) {
608 err = -ENODEV; /*XXX*/
609 goto out2;
610 }
611
Brian Haley56d417b2009-06-01 03:07:33 -0700612 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700613 err = -EACCES;
614 goto out2;
615 }
616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 write_lock(&addrconf_hash_lock);
618
619 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900620 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 ADBG(("ipv6_add_addr: already assigned\n"));
622 err = -EEXIST;
623 goto out;
624 }
625
Ingo Oeser322f74a2006-03-20 23:01:47 -0800626 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628 if (ifa == NULL) {
629 ADBG(("ipv6_add_addr: malloc failed\n"));
630 err = -ENOBUFS;
631 goto out;
632 }
633
634 rt = addrconf_dst_alloc(idev, addr, 0);
635 if (IS_ERR(rt)) {
636 err = PTR_ERR(rt);
637 goto out;
638 }
639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 ipv6_addr_copy(&ifa->addr, addr);
641
642 spin_lock_init(&ifa->lock);
643 init_timer(&ifa->timer);
644 ifa->timer.data = (unsigned long) ifa;
645 ifa->scope = scope;
646 ifa->prefix_len = pfxlen;
647 ifa->flags = flags | IFA_F_TENTATIVE;
648 ifa->cstamp = ifa->tstamp = jiffies;
649
Keir Fraser57f5f542006-08-29 02:43:49 -0700650 ifa->rt = rt;
651
Neil Horman95c385b2007-04-25 17:08:10 -0700652 /*
653 * part one of RFC 4429, section 3.3
654 * We should not configure an address as
655 * optimistic if we do not yet know the link
656 * layer address of our nexhop router
657 */
658
659 if (rt->rt6i_nexthop == NULL)
660 ifa->flags &= ~IFA_F_OPTIMISTIC;
661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 ifa->idev = idev;
663 in6_dev_hold(idev);
664 /* For caller */
665 in6_ifa_hold(ifa);
666
667 /* Add to big hash table */
668 hash = ipv6_addr_hash(addr);
669
670 ifa->lst_next = inet6_addr_lst[hash];
671 inet6_addr_lst[hash] = ifa;
672 in6_ifa_hold(ifa);
673 write_unlock(&addrconf_hash_lock);
674
675 write_lock(&idev->lock);
676 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700677 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
679#ifdef CONFIG_IPV6_PRIVACY
680 if (ifa->flags&IFA_F_TEMPORARY) {
681 ifa->tmp_next = idev->tempaddr_list;
682 idev->tempaddr_list = ifa;
683 in6_ifa_hold(ifa);
684 }
685#endif
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 in6_ifa_hold(ifa);
688 write_unlock(&idev->lock);
689out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700690 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -0700692 if (likely(err == 0))
Alan Sterne041c682006-03-27 01:16:30 -0800693 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 else {
695 kfree(ifa);
696 ifa = ERR_PTR(err);
697 }
698
699 return ifa;
700out:
701 write_unlock(&addrconf_hash_lock);
702 goto out2;
703}
704
705/* This function wants to get referenced ifp and releases it before return */
706
707static void ipv6_del_addr(struct inet6_ifaddr *ifp)
708{
709 struct inet6_ifaddr *ifa, **ifap;
710 struct inet6_dev *idev = ifp->idev;
711 int hash;
712 int deleted = 0, onlink = 0;
713 unsigned long expires = jiffies;
714
715 hash = ipv6_addr_hash(&ifp->addr);
716
717 ifp->dead = 1;
718
719 write_lock_bh(&addrconf_hash_lock);
720 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
721 ifap = &ifa->lst_next) {
722 if (ifa == ifp) {
723 *ifap = ifa->lst_next;
724 __in6_ifa_put(ifp);
725 ifa->lst_next = NULL;
726 break;
727 }
728 }
729 write_unlock_bh(&addrconf_hash_lock);
730
731 write_lock_bh(&idev->lock);
732#ifdef CONFIG_IPV6_PRIVACY
733 if (ifp->flags&IFA_F_TEMPORARY) {
734 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
735 ifap = &ifa->tmp_next) {
736 if (ifa == ifp) {
737 *ifap = ifa->tmp_next;
738 if (ifp->ifpub) {
739 in6_ifa_put(ifp->ifpub);
740 ifp->ifpub = NULL;
741 }
742 __in6_ifa_put(ifp);
743 ifa->tmp_next = NULL;
744 break;
745 }
746 }
747 }
748#endif
749
Kristian Slavov1d142802005-12-21 18:47:24 -0800750 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 if (ifa == ifp) {
752 *ifap = ifa->if_next;
753 __in6_ifa_put(ifp);
754 ifa->if_next = NULL;
755 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
756 break;
757 deleted = 1;
Kristian Slavov1d142802005-12-21 18:47:24 -0800758 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 } else if (ifp->flags & IFA_F_PERMANENT) {
760 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
761 ifp->prefix_len)) {
762 if (ifa->flags & IFA_F_PERMANENT) {
763 onlink = 1;
764 if (deleted)
765 break;
766 } else {
767 unsigned long lifetime;
768
769 if (!onlink)
770 onlink = -1;
771
772 spin_lock(&ifa->lock);
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900773
774 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
775 /*
776 * Note: Because this address is
777 * not permanent, lifetime <
778 * LONG_MAX / HZ here.
779 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 if (time_before(expires,
781 ifa->tstamp + lifetime * HZ))
782 expires = ifa->tstamp + lifetime * HZ;
783 spin_unlock(&ifa->lock);
784 }
785 }
786 }
Kristian Slavov1d142802005-12-21 18:47:24 -0800787 ifap = &ifa->if_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 }
789 write_unlock_bh(&idev->lock);
790
Andrey Vaginb2238562008-07-08 15:13:31 -0700791 addrconf_del_timer(ifp);
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 ipv6_ifa_notify(RTM_DELADDR, ifp);
794
Alan Sterne041c682006-03-27 01:16:30 -0800795 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 /*
798 * Purge or update corresponding prefix
799 *
800 * 1) we don't purge prefix here if address was not permanent.
801 * prefix is managed by its own lifetime.
802 * 2) if there're no addresses, delete prefix.
803 * 3) if there're still other permanent address(es),
804 * corresponding prefix is still permanent.
805 * 4) otherwise, update prefix lifetime to the
806 * longest valid lifetime among the corresponding
807 * addresses on the device.
808 * Note: subsequent RA will update lifetime.
809 *
810 * --yoshfuji
811 */
812 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
813 struct in6_addr prefix;
814 struct rt6_info *rt;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900815 struct net *net = dev_net(ifp->idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
Benjamin Thery6fda7352008-03-05 10:47:47 -0800817 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +0900819 if (rt && addrconf_is_prefix_route(rt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 if (onlink == 0) {
Thomas Grafe0a1ad732006-08-22 00:00:21 -0700821 ip6_del_rt(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 rt = NULL;
823 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
824 rt->rt6i_expires = expires;
825 rt->rt6i_flags |= RTF_EXPIRES;
826 }
827 }
828 dst_release(&rt->u.dst);
829 }
830
831 in6_ifa_put(ifp);
832}
833
834#ifdef CONFIG_IPV6_PRIVACY
835static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
836{
837 struct inet6_dev *idev = ifp->idev;
838 struct in6_addr addr, *tmpaddr;
839 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700840 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 int tmp_plen;
842 int ret = 0;
843 int max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -0700844 u32 addr_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846 write_lock(&idev->lock);
847 if (ift) {
848 spin_lock_bh(&ift->lock);
849 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
850 spin_unlock_bh(&ift->lock);
851 tmpaddr = &addr;
852 } else {
853 tmpaddr = NULL;
854 }
855retry:
856 in6_dev_hold(idev);
857 if (idev->cnf.use_tempaddr <= 0) {
858 write_unlock(&idev->lock);
859 printk(KERN_INFO
860 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
861 in6_dev_put(idev);
862 ret = -1;
863 goto out;
864 }
865 spin_lock_bh(&ifp->lock);
866 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
867 idev->cnf.use_tempaddr = -1; /*XXX*/
868 spin_unlock_bh(&ifp->lock);
869 write_unlock(&idev->lock);
870 printk(KERN_WARNING
871 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
872 in6_dev_put(idev);
873 ret = -1;
874 goto out;
875 }
876 in6_ifa_hold(ifp);
877 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
878 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
879 spin_unlock_bh(&ifp->lock);
880 write_unlock(&idev->lock);
881 printk(KERN_WARNING
882 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
883 in6_ifa_put(ifp);
884 in6_dev_put(idev);
885 ret = -1;
886 goto out;
887 }
888 memcpy(&addr.s6_addr[8], idev->rndid, 8);
889 tmp_valid_lft = min_t(__u32,
890 ifp->valid_lft,
891 idev->cnf.temp_valid_lft);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900892 tmp_prefered_lft = min_t(__u32,
893 ifp->prefered_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 idev->cnf.temp_prefered_lft - desync_factor / HZ);
895 tmp_plen = ifp->prefix_len;
896 max_addresses = idev->cnf.max_addresses;
897 tmp_cstamp = ifp->cstamp;
898 tmp_tstamp = ifp->tstamp;
899 spin_unlock_bh(&ifp->lock);
900
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700901 regen_advance = idev->cnf.regen_max_retry *
902 idev->cnf.dad_transmits *
903 idev->nd_parms->retrans_time / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 write_unlock(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -0700905
Benoit Boissinoteac55bf2008-04-02 00:01:35 -0700906 /* A temporary address is created only if this calculated Preferred
907 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
908 * an implementation must not create a temporary address with a zero
909 * Preferred Lifetime.
910 */
911 if (tmp_prefered_lft <= regen_advance) {
912 in6_ifa_put(ifp);
913 in6_dev_put(idev);
914 ret = -1;
915 goto out;
916 }
917
Neil Horman95c385b2007-04-25 17:08:10 -0700918 addr_flags = IFA_F_TEMPORARY;
919 /* set in addrconf_prefix_rcv() */
920 if (ifp->flags & IFA_F_OPTIMISTIC)
921 addr_flags |= IFA_F_OPTIMISTIC;
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 ift = !max_addresses ||
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900924 ipv6_count_addresses(idev) < max_addresses ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 ipv6_add_addr(idev, &addr, tmp_plen,
Neil Horman95c385b2007-04-25 17:08:10 -0700926 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
927 addr_flags) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 if (!ift || IS_ERR(ift)) {
929 in6_ifa_put(ifp);
930 in6_dev_put(idev);
931 printk(KERN_INFO
932 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
933 tmpaddr = &addr;
934 write_lock(&idev->lock);
935 goto retry;
936 }
937
938 spin_lock_bh(&ift->lock);
939 ift->ifpub = ifp;
940 ift->valid_lft = tmp_valid_lft;
941 ift->prefered_lft = tmp_prefered_lft;
942 ift->cstamp = tmp_cstamp;
943 ift->tstamp = tmp_tstamp;
944 spin_unlock_bh(&ift->lock);
945
946 addrconf_dad_start(ift, 0);
947 in6_ifa_put(ift);
948 in6_dev_put(idev);
949out:
950 return ret;
951}
952#endif
953
954/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800955 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900957enum {
958 IPV6_SADDR_RULE_INIT = 0,
959 IPV6_SADDR_RULE_LOCAL,
960 IPV6_SADDR_RULE_SCOPE,
961 IPV6_SADDR_RULE_PREFERRED,
962#ifdef CONFIG_IPV6_MIP6
963 IPV6_SADDR_RULE_HOA,
964#endif
965 IPV6_SADDR_RULE_OIF,
966 IPV6_SADDR_RULE_LABEL,
967#ifdef CONFIG_IPV6_PRIVACY
968 IPV6_SADDR_RULE_PRIVACY,
969#endif
970 IPV6_SADDR_RULE_ORCHID,
971 IPV6_SADDR_RULE_PREFIX,
972 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800973};
974
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900975struct ipv6_saddr_score {
976 int rule;
977 int addr_type;
978 struct inet6_ifaddr *ifa;
979 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
980 int scopedist;
981 int matchlen;
982};
983
984struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900985 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900986 int ifindex;
987 int scope;
988 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900989 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +0900990};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800991
Dave Jonesb6f99a22007-03-22 12:27:49 -0700992static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993{
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -0800994 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
995 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
996 return 1;
997 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998}
999
Benjamin Thery3de23252008-05-28 14:51:24 +02001000static int ipv6_get_saddr_eval(struct net *net,
1001 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001002 struct ipv6_saddr_dst *dst,
1003 int i)
1004{
1005 int ret;
1006
1007 if (i <= score->rule) {
1008 switch (i) {
1009 case IPV6_SADDR_RULE_SCOPE:
1010 ret = score->scopedist;
1011 break;
1012 case IPV6_SADDR_RULE_PREFIX:
1013 ret = score->matchlen;
1014 break;
1015 default:
1016 ret = !!test_bit(i, score->scorebits);
1017 }
1018 goto out;
1019 }
1020
1021 switch (i) {
1022 case IPV6_SADDR_RULE_INIT:
1023 /* Rule 0: remember if hiscore is not ready yet */
1024 ret = !!score->ifa;
1025 break;
1026 case IPV6_SADDR_RULE_LOCAL:
1027 /* Rule 1: Prefer same address */
1028 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1029 break;
1030 case IPV6_SADDR_RULE_SCOPE:
1031 /* Rule 2: Prefer appropriate scope
1032 *
1033 * ret
1034 * ^
1035 * -1 | d 15
1036 * ---+--+-+---> scope
1037 * |
1038 * | d is scope of the destination.
1039 * B-d | \
1040 * | \ <- smaller scope is better if
1041 * B-15 | \ if scope is enough for destinaion.
1042 * | ret = B - scope (-1 <= scope >= d <= 15).
1043 * d-C-1 | /
1044 * |/ <- greater is better
1045 * -C / if scope is not enough for destination.
1046 * /| ret = scope - C (-1 <= d < scope <= 15).
1047 *
1048 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1049 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1050 * Assume B = 0 and we get C > 29.
1051 */
1052 ret = __ipv6_addr_src_scope(score->addr_type);
1053 if (ret >= dst->scope)
1054 ret = -ret;
1055 else
1056 ret -= 128; /* 30 is enough */
1057 score->scopedist = ret;
1058 break;
1059 case IPV6_SADDR_RULE_PREFERRED:
1060 /* Rule 3: Avoid deprecated and optimistic addresses */
1061 ret = ipv6_saddr_preferred(score->addr_type) ||
1062 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1063 break;
1064#ifdef CONFIG_IPV6_MIP6
1065 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001066 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001067 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001068 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1069 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001070 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001071 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001072#endif
1073 case IPV6_SADDR_RULE_OIF:
1074 /* Rule 5: Prefer outgoing interface */
1075 ret = (!dst->ifindex ||
1076 dst->ifindex == score->ifa->idev->dev->ifindex);
1077 break;
1078 case IPV6_SADDR_RULE_LABEL:
1079 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001080 ret = ipv6_addr_label(net,
1081 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001082 score->ifa->idev->dev->ifindex) == dst->label;
1083 break;
1084#ifdef CONFIG_IPV6_PRIVACY
1085 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001086 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001087 /* Rule 7: Prefer public address
1088 * Note: prefer temprary address if use_tempaddr >= 2
1089 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001090 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1091 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1092 score->ifa->idev->cnf.use_tempaddr >= 2;
1093 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001094 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001095 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001096#endif
1097 case IPV6_SADDR_RULE_ORCHID:
1098 /* Rule 8-: Prefer ORCHID vs ORCHID or
1099 * non-ORCHID vs non-ORCHID
1100 */
1101 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1102 ipv6_addr_orchid(dst->addr));
1103 break;
1104 case IPV6_SADDR_RULE_PREFIX:
1105 /* Rule 8: Use longest matching prefix */
1106 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1107 dst->addr);
1108 break;
1109 default:
1110 ret = 0;
1111 }
1112
1113 if (ret)
1114 __set_bit(i, score->scorebits);
1115 score->rule = i;
1116out:
1117 return ret;
1118}
1119
Brian Haley191cd582008-08-14 15:33:21 -07001120int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001121 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001122 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123{
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001124 struct ipv6_saddr_score scores[2],
1125 *score = &scores[0], *hiscore = &scores[1];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001126 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001127 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001128 int dst_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001130 dst_type = __ipv6_addr_type(daddr);
1131 dst.addr = daddr;
1132 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1133 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001134 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001135 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001136
1137 hiscore->rule = -1;
1138 hiscore->ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140 read_lock(&dev_base_lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001141 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001142
Benjamin Thery6fda7352008-03-05 10:47:47 -08001143 for_each_netdev(net, dev) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001144 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001145
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001146 /* Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001147 * - multicast and link-local destination address,
1148 * the set of candidate source address MUST only
1149 * include addresses assigned to interfaces
1150 * belonging to the same link as the outgoing
1151 * interface.
1152 * (- For site-local destination addresses, the
1153 * set of candidate source addresses MUST only
1154 * include addresses assigned to interfaces
1155 * belonging to the same site as the outgoing
1156 * interface.)
1157 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001158 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1159 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1160 dst.ifindex && dev->ifindex != dst.ifindex)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001161 continue;
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 idev = __in6_dev_get(dev);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001164 if (!idev)
1165 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001167 read_lock_bh(&idev->lock);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001168 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1169 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001171 /*
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001172 * - Tentative Address (RFC2462 section 5.4)
1173 * - A tentative address is not considered
1174 * "assigned to an interface" in the traditional
Neil Horman95c385b2007-04-25 17:08:10 -07001175 * sense, unless it is also flagged as optimistic.
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001176 * - Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001177 * - In any case, anycast addresses, multicast
1178 * addresses, and the unspecified address MUST
1179 * NOT be included in a candidate set.
1180 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001181 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1182 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001183 continue;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001184
1185 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1186
1187 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1188 score->addr_type & IPV6_ADDR_MULTICAST)) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001189 LIMIT_NETDEBUG(KERN_DEBUG
Joe Perches3b6d8212007-11-19 23:47:25 -08001190 "ADDRCONF: unspecified / multicast address "
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001191 "assigned as unicast address on %s",
1192 dev->name);
1193 continue;
1194 }
1195
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001196 score->rule = -1;
1197 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001198
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001199 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1200 int minihiscore, miniscore;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001201
Benjamin Thery3de23252008-05-28 14:51:24 +02001202 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1203 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001204
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001205 if (minihiscore > miniscore) {
1206 if (i == IPV6_SADDR_RULE_SCOPE &&
1207 score->scopedist > 0) {
1208 /*
1209 * special case:
1210 * each remaining entry
1211 * has too small (not enough)
1212 * scope, because ifa entries
1213 * are sorted by their scope
1214 * values.
1215 */
1216 goto try_nextdev;
1217 }
1218 break;
1219 } else if (minihiscore < miniscore) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001220 if (hiscore->ifa)
1221 in6_ifa_put(hiscore->ifa);
1222
1223 in6_ifa_hold(score->ifa);
1224
Ilpo Järvinena0bffff2009-03-21 13:36:17 -07001225 swap(hiscore, score);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001226
1227 /* restore our iterator */
1228 score->ifa = hiscore->ifa;
1229
1230 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 }
1232 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001233 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001234try_nextdev:
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001235 read_unlock_bh(&idev->lock);
1236 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001237 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 read_unlock(&dev_base_lock);
1239
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001240 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001241 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001242
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001243 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1244 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001245 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246}
1247
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001248EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Neil Horman95c385b2007-04-25 17:08:10 -07001250int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1251 unsigned char banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
1253 struct inet6_dev *idev;
1254 int err = -EADDRNOTAVAIL;
1255
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001256 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 if ((idev = __in6_dev_get(dev)) != NULL) {
1258 struct inet6_ifaddr *ifp;
1259
1260 read_lock_bh(&idev->lock);
1261 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
Neil Horman95c385b2007-04-25 17:08:10 -07001262 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 ipv6_addr_copy(addr, &ifp->addr);
1264 err = 0;
1265 break;
1266 }
1267 }
1268 read_unlock_bh(&idev->lock);
1269 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001270 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 return err;
1272}
1273
1274static int ipv6_count_addresses(struct inet6_dev *idev)
1275{
1276 int cnt = 0;
1277 struct inet6_ifaddr *ifp;
1278
1279 read_lock_bh(&idev->lock);
1280 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1281 cnt++;
1282 read_unlock_bh(&idev->lock);
1283 return cnt;
1284}
1285
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001286int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1287 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288{
1289 struct inet6_ifaddr * ifp;
1290 u8 hash = ipv6_addr_hash(addr);
1291
1292 read_lock_bh(&addrconf_hash_lock);
1293 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001294 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001295 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 if (ipv6_addr_equal(&ifp->addr, addr) &&
1297 !(ifp->flags&IFA_F_TENTATIVE)) {
1298 if (dev == NULL || ifp->idev->dev == dev ||
1299 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1300 break;
1301 }
1302 }
1303 read_unlock_bh(&addrconf_hash_lock);
1304 return ifp != NULL;
1305}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001306EXPORT_SYMBOL(ipv6_chk_addr);
1307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308static
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001309int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1310 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311{
1312 struct inet6_ifaddr * ifp;
1313 u8 hash = ipv6_addr_hash(addr);
1314
1315 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001316 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001317 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 if (ipv6_addr_equal(&ifp->addr, addr)) {
1319 if (dev == NULL || ifp->idev->dev == dev)
1320 break;
1321 }
1322 }
1323 return ifp != NULL;
1324}
1325
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001326int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1327{
1328 struct inet6_dev *idev;
1329 struct inet6_ifaddr *ifa;
1330 int onlink;
1331
1332 onlink = 0;
1333 rcu_read_lock();
1334 idev = __in6_dev_get(dev);
1335 if (idev) {
1336 read_lock_bh(&idev->lock);
1337 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1338 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1339 ifa->prefix_len);
1340 if (onlink)
1341 break;
1342 }
1343 read_unlock_bh(&idev->lock);
1344 }
1345 rcu_read_unlock();
1346 return onlink;
1347}
1348
1349EXPORT_SYMBOL(ipv6_chk_prefix);
1350
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001351struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001352 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353{
1354 struct inet6_ifaddr * ifp;
1355 u8 hash = ipv6_addr_hash(addr);
1356
1357 read_lock_bh(&addrconf_hash_lock);
1358 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001359 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001360 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 if (ipv6_addr_equal(&ifp->addr, addr)) {
1362 if (dev == NULL || ifp->idev->dev == dev ||
1363 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1364 in6_ifa_hold(ifp);
1365 break;
1366 }
1367 }
1368 }
1369 read_unlock_bh(&addrconf_hash_lock);
1370
1371 return ifp;
1372}
1373
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374/* Gets referenced address, destroys ifaddr */
1375
Brian Haleycc411d02009-09-09 14:41:32 +00001376static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 if (ifp->flags&IFA_F_PERMANENT) {
1379 spin_lock_bh(&ifp->lock);
1380 addrconf_del_timer(ifp);
1381 ifp->flags |= IFA_F_TENTATIVE;
Brian Haleycc411d02009-09-09 14:41:32 +00001382 if (dad_failed)
1383 ifp->flags |= IFA_F_DADFAILED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 spin_unlock_bh(&ifp->lock);
1385 in6_ifa_put(ifp);
1386#ifdef CONFIG_IPV6_PRIVACY
1387 } else if (ifp->flags&IFA_F_TEMPORARY) {
1388 struct inet6_ifaddr *ifpub;
1389 spin_lock_bh(&ifp->lock);
1390 ifpub = ifp->ifpub;
1391 if (ifpub) {
1392 in6_ifa_hold(ifpub);
1393 spin_unlock_bh(&ifp->lock);
1394 ipv6_create_tempaddr(ifpub, ifp);
1395 in6_ifa_put(ifpub);
1396 } else {
1397 spin_unlock_bh(&ifp->lock);
1398 }
1399 ipv6_del_addr(ifp);
1400#endif
1401 } else
1402 ipv6_del_addr(ifp);
1403}
1404
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001405void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1406{
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001407 struct inet6_dev *idev = ifp->idev;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001408
1409 if (net_ratelimit())
Jens Rosenboom0522fea2009-09-17 10:24:24 -07001410 printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
1411 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001412
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001413 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1414 struct in6_addr addr;
1415
1416 addr.s6_addr32[0] = htonl(0xfe800000);
1417 addr.s6_addr32[1] = 0;
1418
1419 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1420 ipv6_addr_equal(&ifp->addr, &addr)) {
1421 /* DAD failed for link-local based on MAC address */
1422 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001423
1424 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1425 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001426 }
1427 }
1428
Brian Haleycc411d02009-09-09 14:41:32 +00001429 addrconf_dad_stop(ifp, 1);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001430}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
1432/* Join to solicited addr multicast group. */
1433
1434void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1435{
1436 struct in6_addr maddr;
1437
1438 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1439 return;
1440
1441 addrconf_addr_solict_mult(addr, &maddr);
1442 ipv6_dev_mc_inc(dev, &maddr);
1443}
1444
1445void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1446{
1447 struct in6_addr maddr;
1448
1449 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1450 return;
1451
1452 addrconf_addr_solict_mult(addr, &maddr);
1453 __ipv6_dev_mc_dec(idev, &maddr);
1454}
1455
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001456static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457{
1458 struct in6_addr addr;
1459 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1460 if (ipv6_addr_any(&addr))
1461 return;
1462 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1463}
1464
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001465static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
1467 struct in6_addr addr;
1468 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1469 if (ipv6_addr_any(&addr))
1470 return;
1471 __ipv6_dev_ac_dec(ifp->idev, &addr);
1472}
1473
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001474static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1475{
1476 if (dev->addr_len != ETH_ALEN)
1477 return -1;
1478 memcpy(eui, dev->dev_addr, 3);
1479 memcpy(eui + 5, dev->dev_addr + 3, 3);
1480
1481 /*
1482 * The zSeries OSA network cards can be shared among various
1483 * OS instances, but the OSA cards have only one MAC address.
1484 * This leads to duplicate address conflicts in conjunction
1485 * with IPv6 if more than one instance uses the same card.
1486 *
1487 * The driver for these cards can deliver a unique 16-bit
1488 * identifier for each instance sharing the same card. It is
1489 * placed instead of 0xFFFE in the interface identifier. The
1490 * "u" bit of the interface identifier is not inverted in this
1491 * case. Hence the resulting interface identifier has local
1492 * scope according to RFC2373.
1493 */
1494 if (dev->dev_id) {
1495 eui[3] = (dev->dev_id >> 8) & 0xFF;
1496 eui[4] = dev->dev_id & 0xFF;
1497 } else {
1498 eui[3] = 0xFF;
1499 eui[4] = 0xFE;
1500 eui[0] ^= 2;
1501 }
1502 return 0;
1503}
1504
1505static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1506{
1507 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1508 if (dev->addr_len != ARCNET_ALEN)
1509 return -1;
1510 memset(eui, 0, 7);
1511 eui[7] = *(u8*)dev->dev_addr;
1512 return 0;
1513}
1514
1515static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1516{
1517 if (dev->addr_len != INFINIBAND_ALEN)
1518 return -1;
1519 memcpy(eui, dev->dev_addr + 12, 8);
1520 eui[0] |= 2;
1521 return 0;
1522}
1523
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001524int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1525{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00001526 if (addr == 0)
1527 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001528 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1529 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1530 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1531 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1532 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1533 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1534 eui[1] = 0;
1535 eui[2] = 0x5E;
1536 eui[3] = 0xFE;
1537 memcpy(eui + 4, &addr, 4);
1538 return 0;
1539}
1540EXPORT_SYMBOL(__ipv6_isatap_ifid);
1541
1542static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1543{
1544 if (dev->priv_flags & IFF_ISATAP)
1545 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1546 return -1;
1547}
1548
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1550{
1551 switch (dev->type) {
1552 case ARPHRD_ETHER:
1553 case ARPHRD_FDDI:
1554 case ARPHRD_IEEE802_TR:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001555 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001557 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001559 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001560 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001561 return addrconf_ifid_sit(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 }
1563 return -1;
1564}
1565
1566static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1567{
1568 int err = -1;
1569 struct inet6_ifaddr *ifp;
1570
1571 read_lock_bh(&idev->lock);
1572 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1573 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1574 memcpy(eui, ifp->addr.s6_addr+8, 8);
1575 err = 0;
1576 break;
1577 }
1578 }
1579 read_unlock_bh(&idev->lock);
1580 return err;
1581}
1582
1583#ifdef CONFIG_IPV6_PRIVACY
1584/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1585static int __ipv6_regen_rndid(struct inet6_dev *idev)
1586{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08001588 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590
1591 /*
1592 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1593 * check if generated address is not inappropriate
1594 *
1595 * - Reserved subnet anycast (RFC 2526)
1596 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001597 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 * 00-00-5E-FE-xx-xx-xx-xx
1599 * - value 0
1600 * - XXX: already assigned to an address on the device
1601 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001602 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1604 (idev->rndid[7]&0x80))
1605 goto regen;
1606 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1607 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1608 goto regen;
1609 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1610 goto regen;
1611 }
1612
1613 return 0;
1614}
1615
1616static void ipv6_regen_rndid(unsigned long data)
1617{
1618 struct inet6_dev *idev = (struct inet6_dev *) data;
1619 unsigned long expires;
1620
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001621 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 write_lock_bh(&idev->lock);
1623
1624 if (idev->dead)
1625 goto out;
1626
1627 if (__ipv6_regen_rndid(idev) < 0)
1628 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001629
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001631 idev->cnf.temp_prefered_lft * HZ -
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1633 if (time_before(expires, jiffies)) {
1634 printk(KERN_WARNING
1635 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1636 idev->dev->name);
1637 goto out;
1638 }
1639
1640 if (!mod_timer(&idev->regen_timer, expires))
1641 in6_dev_hold(idev);
1642
1643out:
1644 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001645 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 in6_dev_put(idev);
1647}
1648
1649static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1650 int ret = 0;
1651
1652 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1653 ret = __ipv6_regen_rndid(idev);
1654 return ret;
1655}
1656#endif
1657
1658/*
1659 * Add prefix route.
1660 */
1661
1662static void
1663addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07001664 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665{
Thomas Graf86872cb2006-08-22 00:01:08 -07001666 struct fib6_config cfg = {
1667 .fc_table = RT6_TABLE_PREFIX,
1668 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1669 .fc_ifindex = dev->ifindex,
1670 .fc_expires = expires,
1671 .fc_dst_len = plen,
1672 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001673 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07001674 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07001675 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
Thomas Graf86872cb2006-08-22 00:01:08 -07001677 ipv6_addr_copy(&cfg.fc_dst, pfx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
1679 /* Prevent useless cloning on PtP SIT.
1680 This thing is done here expecting that the whole
1681 class of non-broadcast devices need not cloning.
1682 */
Joerg Roedel0be669b2006-10-10 14:49:53 -07001683#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Thomas Graf86872cb2006-08-22 00:01:08 -07001684 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1685 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07001686#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687
Thomas Graf86872cb2006-08-22 00:01:08 -07001688 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689}
1690
1691/* Create "default" multicast route to the interface */
1692
1693static void addrconf_add_mroute(struct net_device *dev)
1694{
Thomas Graf86872cb2006-08-22 00:01:08 -07001695 struct fib6_config cfg = {
1696 .fc_table = RT6_TABLE_LOCAL,
1697 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1698 .fc_ifindex = dev->ifindex,
1699 .fc_dst_len = 8,
1700 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001701 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001702 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703
Thomas Graf86872cb2006-08-22 00:01:08 -07001704 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1705
1706 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707}
1708
Joerg Roedel0be669b2006-10-10 14:49:53 -07001709#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710static void sit_route_add(struct net_device *dev)
1711{
Thomas Graf86872cb2006-08-22 00:01:08 -07001712 struct fib6_config cfg = {
1713 .fc_table = RT6_TABLE_MAIN,
1714 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1715 .fc_ifindex = dev->ifindex,
1716 .fc_dst_len = 96,
1717 .fc_flags = RTF_UP | RTF_NONEXTHOP,
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
1721 /* prefix length - 96 bits "::d.d.d.d" */
Thomas Graf86872cb2006-08-22 00:01:08 -07001722 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723}
Joerg Roedel0be669b2006-10-10 14:49:53 -07001724#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
1726static void addrconf_add_lroute(struct net_device *dev)
1727{
1728 struct in6_addr addr;
1729
1730 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1731 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1732}
1733
1734static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1735{
1736 struct inet6_dev *idev;
1737
1738 ASSERT_RTNL();
1739
1740 if ((idev = ipv6_find_idev(dev)) == NULL)
1741 return NULL;
1742
1743 /* Add default multicast route */
1744 addrconf_add_mroute(dev);
1745
1746 /* Add link local route */
1747 addrconf_add_lroute(dev);
1748 return idev;
1749}
1750
1751void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1752{
1753 struct prefix_info *pinfo;
1754 __u32 valid_lft;
1755 __u32 prefered_lft;
1756 int addr_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07001758 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759
1760 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001761
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 if (len < sizeof(struct prefix_info)) {
1763 ADBG(("addrconf: prefix option too short\n"));
1764 return;
1765 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001766
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 /*
1768 * Validation checks ([ADDRCONF], page 19)
1769 */
1770
1771 addr_type = ipv6_addr_type(&pinfo->prefix);
1772
1773 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1774 return;
1775
1776 valid_lft = ntohl(pinfo->valid);
1777 prefered_lft = ntohl(pinfo->prefered);
1778
1779 if (prefered_lft > valid_lft) {
1780 if (net_ratelimit())
1781 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1782 return;
1783 }
1784
1785 in6_dev = in6_dev_get(dev);
1786
1787 if (in6_dev == NULL) {
1788 if (net_ratelimit())
1789 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1790 return;
1791 }
1792
1793 /*
1794 * Two things going on here:
1795 * 1) Add routes for on-link prefixes
1796 * 2) Configure prefixes with the auto flag set
1797 */
1798
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001799 if (pinfo->onlink) {
1800 struct rt6_info *rt;
1801 unsigned long rt_expires;
1802
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001803 /* Avoid arithmetic overflow. Really, we could
1804 * save rt_expires in seconds, likely valid_lft,
1805 * but it would require division in fib gc, that it
1806 * not good.
1807 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001808 if (HZ > USER_HZ)
1809 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1810 else
1811 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08001812
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001813 if (addrconf_finite_timeout(rt_expires))
1814 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815
Brian Haley56d417b2009-06-01 03:07:33 -07001816 rt = rt6_lookup(net, &pinfo->prefix, NULL,
Benjamin Thery6fda7352008-03-05 10:47:47 -08001817 dev->ifindex, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
YOSHIFUJI Hideaki2b5ead42008-05-13 01:16:24 +09001819 if (rt && addrconf_is_prefix_route(rt)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001820 /* Autoconf prefix route */
1821 if (valid_lft == 0) {
1822 ip6_del_rt(rt);
1823 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001824 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001825 /* not infinity */
1826 rt->rt6i_expires = jiffies + rt_expires;
1827 rt->rt6i_flags |= RTF_EXPIRES;
1828 } else {
1829 rt->rt6i_flags &= ~RTF_EXPIRES;
1830 rt->rt6i_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 }
1832 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001833 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09001834 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1835 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001836 /* not infinity */
1837 flags |= RTF_EXPIRES;
1838 expires = jiffies_to_clock_t(rt_expires);
1839 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07001841 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 }
1843 if (rt)
1844 dst_release(&rt->u.dst);
1845 }
1846
1847 /* Try to figure out our local address for this prefix */
1848
1849 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1850 struct inet6_ifaddr * ifp;
1851 struct in6_addr addr;
1852 int create = 0, update_lft = 0;
1853
1854 if (pinfo->prefix_len == 64) {
1855 memcpy(&addr, &pinfo->prefix, 8);
1856 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1857 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1858 in6_dev_put(in6_dev);
1859 return;
1860 }
1861 goto ok;
1862 }
1863 if (net_ratelimit())
1864 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1865 pinfo->prefix_len);
1866 in6_dev_put(in6_dev);
1867 return;
1868
1869ok:
1870
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001871 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
1873 if (ifp == NULL && valid_lft) {
1874 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07001875 u32 addr_flags = 0;
1876
1877#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1878 if (in6_dev->cnf.optimistic_dad &&
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001879 !net->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07001880 addr_flags = IFA_F_OPTIMISTIC;
1881#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882
1883 /* Do not allow to create too much of autoconfigured
1884 * addresses; this would be too easy way to crash kernel.
1885 */
1886 if (!max_addresses ||
1887 ipv6_count_addresses(in6_dev) < max_addresses)
1888 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07001889 addr_type&IPV6_ADDR_SCOPE_MASK,
1890 addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891
1892 if (!ifp || IS_ERR(ifp)) {
1893 in6_dev_put(in6_dev);
1894 return;
1895 }
1896
1897 update_lft = create = 1;
1898 ifp->cstamp = jiffies;
1899 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1900 }
1901
1902 if (ifp) {
1903 int flags;
1904 unsigned long now;
1905#ifdef CONFIG_IPV6_PRIVACY
1906 struct inet6_ifaddr *ift;
1907#endif
1908 u32 stored_lft;
1909
1910 /* update lifetime (RFC2462 5.5.3 e) */
1911 spin_lock(&ifp->lock);
1912 now = jiffies;
1913 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1914 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1915 else
1916 stored_lft = 0;
1917 if (!update_lft && stored_lft) {
1918 if (valid_lft > MIN_VALID_LIFETIME ||
1919 valid_lft > stored_lft)
1920 update_lft = 1;
1921 else if (stored_lft <= MIN_VALID_LIFETIME) {
1922 /* valid_lft <= stored_lft is always true */
Brian Haleya1ed0522009-07-02 07:10:52 +00001923 /*
1924 * RFC 4862 Section 5.5.3e:
1925 * "Note that the preferred lifetime of
1926 * the corresponding address is always
1927 * reset to the Preferred Lifetime in
1928 * the received Prefix Information
1929 * option, regardless of whether the
1930 * valid lifetime is also reset or
1931 * ignored."
1932 *
1933 * So if the preferred lifetime in
1934 * this advertisement is different
1935 * than what we have stored, but the
1936 * valid lifetime is invalid, just
1937 * reset prefered_lft.
1938 *
1939 * We must set the valid lifetime
1940 * to the stored lifetime since we'll
1941 * be updating the timestamp below,
1942 * else we'll set it back to the
1943 * minumum.
1944 */
1945 if (prefered_lft != ifp->prefered_lft) {
1946 valid_lft = stored_lft;
1947 update_lft = 1;
1948 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 } else {
1950 valid_lft = MIN_VALID_LIFETIME;
1951 if (valid_lft < prefered_lft)
1952 prefered_lft = valid_lft;
1953 update_lft = 1;
1954 }
1955 }
1956
1957 if (update_lft) {
1958 ifp->valid_lft = valid_lft;
1959 ifp->prefered_lft = prefered_lft;
1960 ifp->tstamp = now;
1961 flags = ifp->flags;
1962 ifp->flags &= ~IFA_F_DEPRECATED;
1963 spin_unlock(&ifp->lock);
1964
1965 if (!(flags&IFA_F_TENTATIVE))
1966 ipv6_ifa_notify(0, ifp);
1967 } else
1968 spin_unlock(&ifp->lock);
1969
1970#ifdef CONFIG_IPV6_PRIVACY
1971 read_lock_bh(&in6_dev->lock);
1972 /* update all temporary addresses in the list */
1973 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1974 /*
1975 * When adjusting the lifetimes of an existing
1976 * temporary address, only lower the lifetimes.
1977 * Implementations must not increase the
1978 * lifetimes of an existing temporary address
1979 * when processing a Prefix Information Option.
1980 */
Benoit Boissinotc6fbfac2008-04-02 00:00:58 -07001981 if (ifp != ift->ifpub)
1982 continue;
1983
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 spin_lock(&ift->lock);
1985 flags = ift->flags;
1986 if (ift->valid_lft > valid_lft &&
1987 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1988 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1989 if (ift->prefered_lft > prefered_lft &&
1990 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1991 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1992 spin_unlock(&ift->lock);
1993 if (!(flags&IFA_F_TENTATIVE))
1994 ipv6_ifa_notify(0, ift);
1995 }
1996
1997 if (create && in6_dev->cnf.use_tempaddr > 0) {
1998 /*
1999 * When a new public address is created as described in [ADDRCONF],
2000 * also create a new temporary address.
2001 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002002 read_unlock_bh(&in6_dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 ipv6_create_tempaddr(ifp, NULL);
2004 } else {
2005 read_unlock_bh(&in6_dev->lock);
2006 }
2007#endif
2008 in6_ifa_put(ifp);
2009 addrconf_verify(0);
2010 }
2011 }
2012 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2013 in6_dev_put(in6_dev);
2014}
2015
2016/*
2017 * Set destination address.
2018 * Special case for SIT interfaces where we create a new "virtual"
2019 * device.
2020 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002021int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022{
2023 struct in6_ifreq ireq;
2024 struct net_device *dev;
2025 int err = -EINVAL;
2026
2027 rtnl_lock();
2028
2029 err = -EFAULT;
2030 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2031 goto err_exit;
2032
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002033 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034
2035 err = -ENODEV;
2036 if (dev == NULL)
2037 goto err_exit;
2038
Joerg Roedel0be669b2006-10-10 14:49:53 -07002039#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002041 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 struct ip_tunnel_parm p;
2044
2045 err = -EADDRNOTAVAIL;
2046 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2047 goto err_exit;
2048
2049 memset(&p, 0, sizeof(p));
2050 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2051 p.iph.saddr = 0;
2052 p.iph.version = 4;
2053 p.iph.ihl = 5;
2054 p.iph.protocol = IPPROTO_IPV6;
2055 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002056 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002058 if (ops->ndo_do_ioctl) {
2059 mm_segment_t oldfs = get_fs();
2060
2061 set_fs(KERNEL_DS);
2062 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2063 set_fs(oldfs);
2064 } else
2065 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066
2067 if (err == 0) {
2068 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002069 dev = __dev_get_by_name(net, p.name);
2070 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 goto err_exit;
2072 err = dev_open(dev);
2073 }
2074 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002075#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
2077err_exit:
2078 rtnl_unlock();
2079 return err;
2080}
2081
2082/*
2083 * Manual configuration of address on an interface
2084 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002085static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002086 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002087 __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088{
2089 struct inet6_ifaddr *ifp;
2090 struct inet6_dev *idev;
2091 struct net_device *dev;
2092 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002093 u32 flags;
2094 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002095 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096
2097 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002098
Thomas Graf24ef0da2008-05-28 16:54:22 +02002099 if (plen > 128)
2100 return -EINVAL;
2101
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002102 /* check the lifetime */
2103 if (!valid_lft || prefered_lft > valid_lft)
2104 return -EINVAL;
2105
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002106 dev = __dev_get_by_index(net, ifindex);
2107 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002109
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 if ((idev = addrconf_add_dev(dev)) == NULL)
2111 return -ENOBUFS;
2112
2113 scope = ipv6_addr_scope(pfx);
2114
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002115 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2116 if (addrconf_finite_timeout(timeout)) {
2117 expires = jiffies_to_clock_t(timeout * HZ);
2118 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002119 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002120 } else {
2121 expires = 0;
2122 flags = 0;
2123 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002124 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002125
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002126 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2127 if (addrconf_finite_timeout(timeout)) {
2128 if (timeout == 0)
2129 ifa_flags |= IFA_F_DEPRECATED;
2130 prefered_lft = timeout;
2131 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002132
2133 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2134
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 if (!IS_ERR(ifp)) {
Herbert Xu06aebfb2006-08-09 16:52:04 -07002136 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002137 ifp->valid_lft = valid_lft;
2138 ifp->prefered_lft = prefered_lft;
2139 ifp->tstamp = jiffies;
Herbert Xu06aebfb2006-08-09 16:52:04 -07002140 spin_unlock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002141
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002142 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002143 expires, flags);
Neil Horman95c385b2007-04-25 17:08:10 -07002144 /*
2145 * Note that section 3.1 of RFC 4429 indicates
2146 * that the Optimistic flag should not be set for
2147 * manually configured addresses
2148 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 addrconf_dad_start(ifp, 0);
2150 in6_ifa_put(ifp);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002151 addrconf_verify(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 return 0;
2153 }
2154
2155 return PTR_ERR(ifp);
2156}
2157
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002158static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002159 unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160{
2161 struct inet6_ifaddr *ifp;
2162 struct inet6_dev *idev;
2163 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002164
Thomas Graf24ef0da2008-05-28 16:54:22 +02002165 if (plen > 128)
2166 return -EINVAL;
2167
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002168 dev = __dev_get_by_index(net, ifindex);
2169 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 return -ENODEV;
2171
2172 if ((idev = __in6_dev_get(dev)) == NULL)
2173 return -ENXIO;
2174
2175 read_lock_bh(&idev->lock);
2176 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2177 if (ifp->prefix_len == plen &&
2178 ipv6_addr_equal(pfx, &ifp->addr)) {
2179 in6_ifa_hold(ifp);
2180 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002181
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 ipv6_del_addr(ifp);
2183
2184 /* If the last address is deleted administratively,
2185 disable IPv6 on this interface.
2186 */
2187 if (idev->addr_list == NULL)
2188 addrconf_ifdown(idev->dev, 1);
2189 return 0;
2190 }
2191 }
2192 read_unlock_bh(&idev->lock);
2193 return -EADDRNOTAVAIL;
2194}
2195
2196
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002197int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198{
2199 struct in6_ifreq ireq;
2200 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002201
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202 if (!capable(CAP_NET_ADMIN))
2203 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002204
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2206 return -EFAULT;
2207
2208 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002209 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2210 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2211 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 rtnl_unlock();
2213 return err;
2214}
2215
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002216int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217{
2218 struct in6_ifreq ireq;
2219 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002220
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 if (!capable(CAP_NET_ADMIN))
2222 return -EPERM;
2223
2224 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2225 return -EFAULT;
2226
2227 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002228 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2229 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 rtnl_unlock();
2231 return err;
2232}
2233
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002234static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2235 int plen, int scope)
2236{
2237 struct inet6_ifaddr *ifp;
2238
2239 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2240 if (!IS_ERR(ifp)) {
2241 spin_lock_bh(&ifp->lock);
2242 ifp->flags &= ~IFA_F_TENTATIVE;
2243 spin_unlock_bh(&ifp->lock);
2244 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2245 in6_ifa_put(ifp);
2246 }
2247}
2248
Joerg Roedel0be669b2006-10-10 14:49:53 -07002249#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250static void sit_add_v4_addrs(struct inet6_dev *idev)
2251{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 struct in6_addr addr;
2253 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002254 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 int scope;
2256
2257 ASSERT_RTNL();
2258
2259 memset(&addr, 0, sizeof(struct in6_addr));
2260 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2261
2262 if (idev->dev->flags&IFF_POINTOPOINT) {
2263 addr.s6_addr32[0] = htonl(0xfe800000);
2264 scope = IFA_LINK;
2265 } else {
2266 scope = IPV6_ADDR_COMPATv4;
2267 }
2268
2269 if (addr.s6_addr32[3]) {
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002270 add_addr(idev, &addr, 128, scope);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 return;
2272 }
2273
Benjamin Thery6fda7352008-03-05 10:47:47 -08002274 for_each_netdev(net, dev) {
Herbert Xue5ed6392005-10-03 14:35:55 -07002275 struct in_device * in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 if (in_dev && (dev->flags & IFF_UP)) {
2277 struct in_ifaddr * ifa;
2278
2279 int flag = scope;
2280
2281 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2282 int plen;
2283
2284 addr.s6_addr32[3] = ifa->ifa_local;
2285
2286 if (ifa->ifa_scope == RT_SCOPE_LINK)
2287 continue;
2288 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2289 if (idev->dev->flags&IFF_POINTOPOINT)
2290 continue;
2291 flag |= IFA_HOST;
2292 }
2293 if (idev->dev->flags&IFF_POINTOPOINT)
2294 plen = 64;
2295 else
2296 plen = 96;
2297
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002298 add_addr(idev, &addr, plen, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 }
2300 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002303#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304
2305static void init_loopback(struct net_device *dev)
2306{
2307 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308
2309 /* ::1 */
2310
2311 ASSERT_RTNL();
2312
2313 if ((idev = ipv6_find_idev(dev)) == NULL) {
2314 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2315 return;
2316 }
2317
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002318 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319}
2320
2321static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2322{
2323 struct inet6_ifaddr * ifp;
Neil Horman95c385b2007-04-25 17:08:10 -07002324 u32 addr_flags = IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325
Neil Horman95c385b2007-04-25 17:08:10 -07002326#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2327 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002328 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002329 addr_flags |= IFA_F_OPTIMISTIC;
2330#endif
2331
2332
2333 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002335 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336 addrconf_dad_start(ifp, 0);
2337 in6_ifa_put(ifp);
2338 }
2339}
2340
2341static void addrconf_dev_config(struct net_device *dev)
2342{
2343 struct in6_addr addr;
2344 struct inet6_dev * idev;
2345
2346 ASSERT_RTNL();
2347
Herbert Xu74235a22007-06-14 13:02:55 -07002348 if ((dev->type != ARPHRD_ETHER) &&
2349 (dev->type != ARPHRD_FDDI) &&
2350 (dev->type != ARPHRD_IEEE802_TR) &&
2351 (dev->type != ARPHRD_ARCNET) &&
2352 (dev->type != ARPHRD_INFINIBAND)) {
2353 /* Alas, we support only Ethernet autoconfiguration. */
2354 return;
2355 }
2356
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 idev = addrconf_add_dev(dev);
2358 if (idev == NULL)
2359 return;
2360
2361 memset(&addr, 0, sizeof(struct in6_addr));
2362 addr.s6_addr32[0] = htonl(0xFE800000);
2363
2364 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2365 addrconf_add_linklocal(idev, &addr);
2366}
2367
Joerg Roedel0be669b2006-10-10 14:49:53 -07002368#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369static void addrconf_sit_config(struct net_device *dev)
2370{
2371 struct inet6_dev *idev;
2372
2373 ASSERT_RTNL();
2374
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002375 /*
2376 * Configure the tunnel with one of our IPv4
2377 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378 * our v4 addrs in the tunnel
2379 */
2380
2381 if ((idev = ipv6_find_idev(dev)) == NULL) {
2382 printk(KERN_DEBUG "init sit: add_dev failed\n");
2383 return;
2384 }
2385
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002386 if (dev->priv_flags & IFF_ISATAP) {
2387 struct in6_addr addr;
2388
2389 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2390 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2391 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2392 addrconf_add_linklocal(idev, &addr);
2393 return;
2394 }
2395
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 sit_add_v4_addrs(idev);
2397
2398 if (dev->flags&IFF_POINTOPOINT) {
2399 addrconf_add_mroute(dev);
2400 addrconf_add_lroute(dev);
2401 } else
2402 sit_route_add(dev);
2403}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002404#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405
2406static inline int
2407ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2408{
2409 struct in6_addr lladdr;
2410
Neil Horman95c385b2007-04-25 17:08:10 -07002411 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 addrconf_add_linklocal(idev, &lladdr);
2413 return 0;
2414 }
2415 return -1;
2416}
2417
2418static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2419{
2420 struct net_device *link_dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002421 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422
2423 /* first try to inherit the link-local address from the link device */
2424 if (idev->dev->iflink &&
Benjamin Thery6fda7352008-03-05 10:47:47 -08002425 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 if (!ipv6_inherit_linklocal(idev, link_dev))
2427 return;
2428 }
2429 /* then try to inherit it from any device */
Benjamin Thery6fda7352008-03-05 10:47:47 -08002430 for_each_netdev(net, link_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 if (!ipv6_inherit_linklocal(idev, link_dev))
2432 return;
2433 }
2434 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2435}
2436
2437/*
2438 * Autoconfigure tunnel with a link-local address so routing protocols,
2439 * DHCPv6, MLD etc. can be run over the virtual link
2440 */
2441
2442static void addrconf_ip6_tnl_config(struct net_device *dev)
2443{
2444 struct inet6_dev *idev;
2445
2446 ASSERT_RTNL();
2447
2448 if ((idev = addrconf_add_dev(dev)) == NULL) {
2449 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2450 return;
2451 }
2452 ip6_tnl_add_linklocal(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453}
2454
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002455static int addrconf_notify(struct notifier_block *this, unsigned long event,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002456 void * data)
2457{
2458 struct net_device *dev = (struct net_device *) data;
Herbert Xu74235a22007-06-14 13:02:55 -07002459 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002460 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07002461 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462
2463 switch(event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002464 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07002465 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002466 idev = ipv6_add_dev(dev);
2467 if (!idev)
Herbert Xub217d612007-07-30 17:04:52 -07002468 return notifier_from_errno(-ENOMEM);
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002469 }
2470 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002472 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07002473 if (dev->flags & IFF_SLAVE)
2474 break;
2475
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002476 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002477 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002478 /* device is not ready yet. */
2479 printk(KERN_INFO
2480 "ADDRCONF(NETDEV_UP): %s: "
2481 "link is not ready\n",
2482 dev->name);
2483 break;
2484 }
Kristian Slavov99081042006-02-08 16:10:53 -08002485
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002486 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2487 idev = ipv6_add_dev(dev);
2488
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002489 if (idev) {
Kristian Slavov99081042006-02-08 16:10:53 -08002490 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002491 run_pending = 1;
2492 }
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002493 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002494 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002495 /* device is still not ready. */
2496 break;
2497 }
2498
2499 if (idev) {
2500 if (idev->if_flags & IF_READY) {
2501 /* device is already configured. */
2502 break;
2503 }
2504 idev->if_flags |= IF_READY;
2505 }
2506
2507 printk(KERN_INFO
2508 "ADDRCONF(NETDEV_CHANGE): %s: "
2509 "link becomes ready\n",
2510 dev->name);
2511
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002512 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002513 }
2514
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515 switch(dev->type) {
Joerg Roedel0be669b2006-10-10 14:49:53 -07002516#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002517 case ARPHRD_SIT:
2518 addrconf_sit_config(dev);
2519 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002520#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 case ARPHRD_TUNNEL6:
2522 addrconf_ip6_tnl_config(dev);
2523 break;
2524 case ARPHRD_LOOPBACK:
2525 init_loopback(dev);
2526 break;
2527
2528 default:
2529 addrconf_dev_config(dev);
2530 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002531 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 if (idev) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002533 if (run_pending)
2534 addrconf_dad_run(idev);
2535
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536 /* If the MTU changed during the interface down, when the
2537 interface up, the changed MTU must be reflected in the
2538 idev as well as routers.
2539 */
2540 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2541 rt6_mtu_change(dev, dev->mtu);
2542 idev->cnf.mtu6 = dev->mtu;
2543 }
2544 idev->tstamp = jiffies;
2545 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2546 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2547 stop IPv6 on this interface.
2548 */
2549 if (dev->mtu < IPV6_MIN_MTU)
2550 addrconf_ifdown(dev, event != NETDEV_DOWN);
2551 }
2552 break;
2553
2554 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002555 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556 rt6_mtu_change(dev, dev->mtu);
2557 idev->cnf.mtu6 = dev->mtu;
2558 break;
2559 }
2560
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002561 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2562 idev = ipv6_add_dev(dev);
2563 if (idev)
2564 break;
2565 }
2566
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2568
2569 case NETDEV_DOWN:
2570 case NETDEV_UNREGISTER:
2571 /*
2572 * Remove all addresses from this interface.
2573 */
2574 addrconf_ifdown(dev, event != NETDEV_DOWN);
2575 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002576
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07002579 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002580 addrconf_sysctl_unregister(idev);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11002581 addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07002582 err = snmp6_register_dev(idev);
2583 if (err)
2584 return notifier_from_errno(err);
Stephen Hemminger5632c512007-04-28 21:16:39 -07002585 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 break;
Moni Shoua75c78502009-09-15 02:37:40 -07002587 case NETDEV_BONDING_OLDTYPE:
2588 case NETDEV_BONDING_NEWTYPE:
2589 addrconf_bonding_change(dev, event);
2590 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002591 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592
2593 return NOTIFY_OK;
2594}
2595
2596/*
2597 * addrconf module should be notified of a device going up
2598 */
2599static struct notifier_block ipv6_dev_notf = {
2600 .notifier_call = addrconf_notify,
2601 .priority = 0
2602};
2603
Moni Shoua75c78502009-09-15 02:37:40 -07002604static void addrconf_bonding_change(struct net_device *dev, unsigned long event)
2605{
2606 struct inet6_dev *idev;
2607 ASSERT_RTNL();
2608
2609 idev = __in6_dev_get(dev);
2610
2611 if (event == NETDEV_BONDING_NEWTYPE)
2612 ipv6_mc_remap(idev);
2613 else if (event == NETDEV_BONDING_OLDTYPE)
2614 ipv6_mc_unmap(idev);
2615}
2616
Linus Torvalds1da177e2005-04-16 15:20:36 -07002617static int addrconf_ifdown(struct net_device *dev, int how)
2618{
2619 struct inet6_dev *idev;
2620 struct inet6_ifaddr *ifa, **bifa;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002621 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622 int i;
2623
2624 ASSERT_RTNL();
2625
Daniel Lezcanof3db4852008-03-03 23:27:06 -08002626 rt6_ifdown(net, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002627 neigh_ifdown(&nd_tbl, dev);
2628
2629 idev = __in6_dev_get(dev);
2630 if (idev == NULL)
2631 return -ENODEV;
2632
2633 /* Step 1: remove reference to ipv6 device from parent device.
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002634 Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002636 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002638
2639 /* protected by rtnl_lock */
2640 rcu_assign_pointer(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641
2642 /* Step 1.5: remove snmp6 entry */
2643 snmp6_unregister_dev(idev);
2644
2645 }
2646
2647 /* Step 2: clear hash table */
2648 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2649 bifa = &inet6_addr_lst[i];
2650
2651 write_lock_bh(&addrconf_hash_lock);
2652 while ((ifa = *bifa) != NULL) {
2653 if (ifa->idev == idev) {
2654 *bifa = ifa->lst_next;
2655 ifa->lst_next = NULL;
2656 addrconf_del_timer(ifa);
2657 in6_ifa_put(ifa);
2658 continue;
2659 }
2660 bifa = &ifa->lst_next;
2661 }
2662 write_unlock_bh(&addrconf_hash_lock);
2663 }
2664
2665 write_lock_bh(&idev->lock);
2666
2667 /* Step 3: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002668 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002669 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670
2671 /* Step 4: clear address list */
2672#ifdef CONFIG_IPV6_PRIVACY
Denis V. Lunev439e2382008-04-03 13:30:17 -07002673 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 in6_dev_put(idev);
2675
2676 /* clear tempaddr list */
2677 while ((ifa = idev->tempaddr_list) != NULL) {
2678 idev->tempaddr_list = ifa->tmp_next;
2679 ifa->tmp_next = NULL;
2680 ifa->dead = 1;
2681 write_unlock_bh(&idev->lock);
2682 spin_lock_bh(&ifa->lock);
2683
2684 if (ifa->ifpub) {
2685 in6_ifa_put(ifa->ifpub);
2686 ifa->ifpub = NULL;
2687 }
2688 spin_unlock_bh(&ifa->lock);
2689 in6_ifa_put(ifa);
2690 write_lock_bh(&idev->lock);
2691 }
2692#endif
2693 while ((ifa = idev->addr_list) != NULL) {
2694 idev->addr_list = ifa->if_next;
2695 ifa->if_next = NULL;
2696 ifa->dead = 1;
2697 addrconf_del_timer(ifa);
2698 write_unlock_bh(&idev->lock);
2699
2700 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Vlad Yasevich063ed362007-07-15 00:16:35 -07002701 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 in6_ifa_put(ifa);
2703
2704 write_lock_bh(&idev->lock);
2705 }
2706 write_unlock_bh(&idev->lock);
2707
2708 /* Step 5: Discard multicast list */
2709
Denis V. Lunev439e2382008-04-03 13:30:17 -07002710 if (how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711 ipv6_mc_destroy_dev(idev);
2712 else
2713 ipv6_mc_down(idev);
2714
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002716
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717 /* Shot the device (if unregistered) */
2718
Denis V. Lunev439e2382008-04-03 13:30:17 -07002719 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002720 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 neigh_parms_release(&nd_tbl, idev->nd_parms);
2722 neigh_ifdown(&nd_tbl, dev);
2723 in6_dev_put(idev);
2724 }
2725 return 0;
2726}
2727
2728static void addrconf_rs_timer(unsigned long data)
2729{
2730 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2731
2732 if (ifp->idev->cnf.forwarding)
2733 goto out;
2734
2735 if (ifp->idev->if_flags & IF_RA_RCVD) {
2736 /*
2737 * Announcement received after solicitation
2738 * was sent
2739 */
2740 goto out;
2741 }
2742
2743 spin_lock(&ifp->lock);
2744 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 /* The wait after the last probe can be shorter */
2746 addrconf_mod_timer(ifp, AC_RS,
2747 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2748 ifp->idev->cnf.rtr_solicit_delay :
2749 ifp->idev->cnf.rtr_solicit_interval);
2750 spin_unlock(&ifp->lock);
2751
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002752 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 } else {
2754 spin_unlock(&ifp->lock);
2755 /*
2756 * Note: we do not support deprecated "all on-link"
2757 * assumption any longer.
2758 */
2759 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2760 ifp->idev->dev->name);
2761 }
2762
2763out:
2764 in6_ifa_put(ifp);
2765}
2766
2767/*
2768 * Duplicate Address Detection
2769 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002770static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2771{
2772 unsigned long rand_num;
2773 struct inet6_dev *idev = ifp->idev;
2774
Neil Horman95c385b2007-04-25 17:08:10 -07002775 if (ifp->flags & IFA_F_OPTIMISTIC)
2776 rand_num = 0;
2777 else
2778 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2779
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002780 ifp->probes = idev->cnf.dad_transmits;
2781 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2782}
2783
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07002784static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785{
2786 struct inet6_dev *idev = ifp->idev;
2787 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788
2789 addrconf_join_solict(dev, &ifp->addr);
2790
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 net_srandom(ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792
2793 read_lock_bh(&idev->lock);
2794 if (ifp->dead)
2795 goto out;
2796 spin_lock_bh(&ifp->lock);
2797
2798 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09002799 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07002800 !(ifp->flags&IFA_F_TENTATIVE) ||
2801 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00002802 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002803 spin_unlock_bh(&ifp->lock);
2804 read_unlock_bh(&idev->lock);
2805
2806 addrconf_dad_completed(ifp);
2807 return;
2808 }
2809
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002810 if (!(idev->if_flags & IF_READY)) {
YOSHIFUJI Hideaki3dd3bf82005-12-23 11:23:21 -08002811 spin_unlock_bh(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002812 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002813 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09002814 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002815 * - keep it tentative if it is a permanent address.
2816 * - otherwise, kill it.
2817 */
2818 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00002819 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002820 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002821 }
Neil Horman95c385b2007-04-25 17:08:10 -07002822
2823 /*
2824 * Optimistic nodes can start receiving
2825 * Frames right away
2826 */
2827 if(ifp->flags & IFA_F_OPTIMISTIC)
2828 ip6_ins_rt(ifp->rt);
2829
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08002830 addrconf_dad_kick(ifp);
2831 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832out:
2833 read_unlock_bh(&idev->lock);
2834}
2835
2836static void addrconf_dad_timer(unsigned long data)
2837{
2838 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2839 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840 struct in6_addr mcaddr;
2841
2842 read_lock_bh(&idev->lock);
2843 if (idev->dead) {
2844 read_unlock_bh(&idev->lock);
2845 goto out;
2846 }
2847 spin_lock_bh(&ifp->lock);
2848 if (ifp->probes == 0) {
2849 /*
2850 * DAD was successful
2851 */
2852
Brian Haleycc411d02009-09-09 14:41:32 +00002853 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 spin_unlock_bh(&ifp->lock);
2855 read_unlock_bh(&idev->lock);
2856
2857 addrconf_dad_completed(ifp);
2858
2859 goto out;
2860 }
2861
2862 ifp->probes--;
2863 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2864 spin_unlock_bh(&ifp->lock);
2865 read_unlock_bh(&idev->lock);
2866
2867 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09002869 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870out:
2871 in6_ifa_put(ifp);
2872}
2873
2874static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2875{
2876 struct net_device * dev = ifp->idev->dev;
2877
2878 /*
2879 * Configure the address for reception. Now it is valid.
2880 */
2881
2882 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2883
2884 /* If added prefix is link local and forwarding is off,
2885 start sending router solicitations.
2886 */
2887
2888 if (ifp->idev->cnf.forwarding == 0 &&
2889 ifp->idev->cnf.rtr_solicits > 0 &&
2890 (dev->flags&IFF_LOOPBACK) == 0 &&
2891 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002892 /*
2893 * If a host as already performed a random delay
2894 * [...] as part of DAD [...] there is no need
2895 * to delay again before sending the first RS
2896 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002897 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898
2899 spin_lock_bh(&ifp->lock);
2900 ifp->probes = 1;
2901 ifp->idev->if_flags |= IF_RS_SENT;
2902 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2903 spin_unlock_bh(&ifp->lock);
2904 }
2905}
2906
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002907static void addrconf_dad_run(struct inet6_dev *idev) {
2908 struct inet6_ifaddr *ifp;
2909
2910 read_lock_bh(&idev->lock);
2911 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2912 spin_lock_bh(&ifp->lock);
2913 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2914 spin_unlock_bh(&ifp->lock);
2915 continue;
2916 }
2917 spin_unlock_bh(&ifp->lock);
2918 addrconf_dad_kick(ifp);
2919 }
2920 read_unlock_bh(&idev->lock);
2921}
2922
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923#ifdef CONFIG_PROC_FS
2924struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08002925 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926 int bucket;
2927};
2928
2929static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2930{
2931 struct inet6_ifaddr *ifa = NULL;
2932 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002933 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002934
2935 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2936 ifa = inet6_addr_lst[state->bucket];
Daniel Lezcano3c400902008-01-10 22:42:49 -08002937
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09002938 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
Daniel Lezcano3c400902008-01-10 22:42:49 -08002939 ifa = ifa->lst_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940 if (ifa)
2941 break;
2942 }
2943 return ifa;
2944}
2945
2946static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2947{
2948 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002949 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950
2951 ifa = ifa->lst_next;
2952try_again:
Daniel Lezcano3c400902008-01-10 22:42:49 -08002953 if (ifa) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09002954 if (!net_eq(dev_net(ifa->idev->dev), net)) {
Daniel Lezcano3c400902008-01-10 22:42:49 -08002955 ifa = ifa->lst_next;
2956 goto try_again;
2957 }
2958 }
2959
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2961 ifa = inet6_addr_lst[state->bucket];
2962 goto try_again;
2963 }
Daniel Lezcano3c400902008-01-10 22:42:49 -08002964
Linus Torvalds1da177e2005-04-16 15:20:36 -07002965 return ifa;
2966}
2967
2968static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2969{
2970 struct inet6_ifaddr *ifa = if6_get_first(seq);
2971
2972 if (ifa)
2973 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2974 --pos;
2975 return pos ? NULL : ifa;
2976}
2977
2978static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002979 __acquires(addrconf_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002980{
2981 read_lock_bh(&addrconf_hash_lock);
2982 return if6_get_idx(seq, *pos);
2983}
2984
2985static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2986{
2987 struct inet6_ifaddr *ifa;
2988
2989 ifa = if6_get_next(seq, v);
2990 ++*pos;
2991 return ifa;
2992}
2993
2994static void if6_seq_stop(struct seq_file *seq, void *v)
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002995 __releases(addrconf_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996{
2997 read_unlock_bh(&addrconf_hash_lock);
2998}
2999
3000static int if6_seq_show(struct seq_file *seq, void *v)
3001{
3002 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Harvey Harrison4b7a4272008-10-29 12:50:24 -07003003 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003004 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003005 ifp->idev->dev->ifindex,
3006 ifp->prefix_len,
3007 ifp->scope,
3008 ifp->flags,
3009 ifp->idev->dev->name);
3010 return 0;
3011}
3012
Philippe De Muyter56b3d972007-07-10 23:07:31 -07003013static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003014 .start = if6_seq_start,
3015 .next = if6_seq_next,
3016 .show = if6_seq_show,
3017 .stop = if6_seq_stop,
3018};
3019
3020static int if6_seq_open(struct inode *inode, struct file *file)
3021{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003022 return seq_open_net(inode, file, &if6_seq_ops,
3023 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003024}
3025
Arjan van de Ven9a321442007-02-12 00:55:35 -08003026static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027 .owner = THIS_MODULE,
3028 .open = if6_seq_open,
3029 .read = seq_read,
3030 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003031 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032};
3033
Daniel Lezcano3c400902008-01-10 22:42:49 -08003034static int if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003036 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003037 return -ENOMEM;
3038 return 0;
3039}
3040
Daniel Lezcano3c400902008-01-10 22:42:49 -08003041static void if6_proc_net_exit(struct net *net)
3042{
3043 proc_net_remove(net, "if_inet6");
3044}
3045
3046static struct pernet_operations if6_proc_net_ops = {
3047 .init = if6_proc_net_init,
3048 .exit = if6_proc_net_exit,
3049};
3050
3051int __init if6_proc_init(void)
3052{
3053 return register_pernet_subsys(&if6_proc_net_ops);
3054}
3055
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056void if6_proc_exit(void)
3057{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003058 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003059}
3060#endif /* CONFIG_PROC_FS */
3061
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -07003062#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003063/* Check if address is a home address configured on any interface. */
Daniel Lezcano389f6612008-01-10 22:44:40 -08003064int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003065{
3066 int ret = 0;
3067 struct inet6_ifaddr * ifp;
3068 u8 hash = ipv6_addr_hash(addr);
3069 read_lock_bh(&addrconf_hash_lock);
3070 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003071 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003072 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003073 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003074 (ifp->flags & IFA_F_HOMEADDRESS)) {
3075 ret = 1;
3076 break;
3077 }
3078 }
3079 read_unlock_bh(&addrconf_hash_lock);
3080 return ret;
3081}
3082#endif
3083
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084/*
3085 * Periodic address status verification
3086 */
3087
3088static void addrconf_verify(unsigned long foo)
3089{
3090 struct inet6_ifaddr *ifp;
3091 unsigned long now, next;
3092 int i;
3093
3094 spin_lock_bh(&addrconf_verify_lock);
3095 now = jiffies;
3096 next = now + ADDR_CHECK_FREQUENCY;
3097
3098 del_timer(&addr_chk_timer);
3099
3100 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3101
3102restart:
Yan Zheng5d5780d2005-11-20 13:42:20 -08003103 read_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3105 unsigned long age;
3106#ifdef CONFIG_IPV6_PRIVACY
3107 unsigned long regen_advance;
3108#endif
3109
3110 if (ifp->flags & IFA_F_PERMANENT)
3111 continue;
3112
3113 spin_lock(&ifp->lock);
3114 age = (now - ifp->tstamp) / HZ;
3115
3116#ifdef CONFIG_IPV6_PRIVACY
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003117 regen_advance = ifp->idev->cnf.regen_max_retry *
3118 ifp->idev->cnf.dad_transmits *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119 ifp->idev->nd_parms->retrans_time / HZ;
3120#endif
3121
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003122 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3123 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003124 spin_unlock(&ifp->lock);
3125 in6_ifa_hold(ifp);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003126 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 ipv6_del_addr(ifp);
3128 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003129 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3130 spin_unlock(&ifp->lock);
3131 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00003133 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134 int deprecate = 0;
3135
3136 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3137 deprecate = 1;
3138 ifp->flags |= IFA_F_DEPRECATED;
3139 }
3140
3141 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3142 next = ifp->tstamp + ifp->valid_lft * HZ;
3143
3144 spin_unlock(&ifp->lock);
3145
3146 if (deprecate) {
3147 in6_ifa_hold(ifp);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003148 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003149
3150 ipv6_ifa_notify(0, ifp);
3151 in6_ifa_put(ifp);
3152 goto restart;
3153 }
3154#ifdef CONFIG_IPV6_PRIVACY
3155 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3156 !(ifp->flags&IFA_F_TENTATIVE)) {
3157 if (age >= ifp->prefered_lft - regen_advance) {
3158 struct inet6_ifaddr *ifpub = ifp->ifpub;
3159 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3160 next = ifp->tstamp + ifp->prefered_lft * HZ;
3161 if (!ifp->regen_count && ifpub) {
3162 ifp->regen_count++;
3163 in6_ifa_hold(ifp);
3164 in6_ifa_hold(ifpub);
3165 spin_unlock(&ifp->lock);
Yan Zheng5d5780d2005-11-20 13:42:20 -08003166 read_unlock(&addrconf_hash_lock);
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003167 spin_lock(&ifpub->lock);
3168 ifpub->regen_count = 0;
3169 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170 ipv6_create_tempaddr(ifpub, ifp);
3171 in6_ifa_put(ifpub);
3172 in6_ifa_put(ifp);
3173 goto restart;
3174 }
3175 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3176 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3177 spin_unlock(&ifp->lock);
3178#endif
3179 } else {
3180 /* ifp->prefered_lft <= ifp->valid_lft */
3181 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3182 next = ifp->tstamp + ifp->prefered_lft * HZ;
3183 spin_unlock(&ifp->lock);
3184 }
3185 }
Yan Zheng5d5780d2005-11-20 13:42:20 -08003186 read_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187 }
3188
3189 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3190 add_timer(&addr_chk_timer);
3191 spin_unlock_bh(&addrconf_verify_lock);
3192}
3193
Thomas Graf461d8832006-09-18 00:09:49 -07003194static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3195{
3196 struct in6_addr *pfx = NULL;
3197
3198 if (addr)
3199 pfx = nla_data(addr);
3200
3201 if (local) {
3202 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3203 pfx = NULL;
3204 else
3205 pfx = nla_data(local);
3206 }
3207
3208 return pfx;
3209}
3210
Patrick McHardyef7c79e2007-06-05 12:38:30 -07003211static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07003212 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3213 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3214 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3215};
3216
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217static int
3218inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3219{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003220 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07003221 struct ifaddrmsg *ifm;
3222 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223 struct in6_addr *pfx;
Thomas Grafb933f712006-09-18 00:10:19 -07003224 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003225
Thomas Grafb933f712006-09-18 00:10:19 -07003226 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3227 if (err < 0)
3228 return err;
3229
3230 ifm = nlmsg_data(nlh);
3231 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232 if (pfx == NULL)
3233 return -EINVAL;
3234
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003235 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003236}
3237
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003238static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3239 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003240{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003241 u32 flags;
3242 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003243 unsigned long timeout;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003244
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003245 if (!valid_lft || (prefered_lft > valid_lft))
3246 return -EINVAL;
3247
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003248 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3249 if (addrconf_finite_timeout(timeout)) {
3250 expires = jiffies_to_clock_t(timeout * HZ);
3251 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003252 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003253 } else {
3254 expires = 0;
3255 flags = 0;
3256 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003257 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003258
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003259 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3260 if (addrconf_finite_timeout(timeout)) {
3261 if (timeout == 0)
3262 ifa_flags |= IFA_F_DEPRECATED;
3263 prefered_lft = timeout;
3264 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003265
3266 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003267 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 +09003268 ifp->tstamp = jiffies;
3269 ifp->valid_lft = valid_lft;
3270 ifp->prefered_lft = prefered_lft;
3271
3272 spin_unlock_bh(&ifp->lock);
3273 if (!(ifp->flags&IFA_F_TENTATIVE))
3274 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003275
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003276 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003277 expires, flags);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003278 addrconf_verify(0);
3279
3280 return 0;
3281}
3282
3283static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003284inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3285{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003286 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07003287 struct ifaddrmsg *ifm;
3288 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003289 struct in6_addr *pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07003290 struct inet6_ifaddr *ifa;
3291 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003292 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3293 u8 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07003294 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003295
Thomas Graf461d8832006-09-18 00:09:49 -07003296 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3297 if (err < 0)
3298 return err;
3299
3300 ifm = nlmsg_data(nlh);
3301 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302 if (pfx == NULL)
3303 return -EINVAL;
3304
Thomas Graf461d8832006-09-18 00:09:49 -07003305 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003306 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07003307
3308 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003309 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07003310 preferred_lft = ci->ifa_prefered;
3311 } else {
3312 preferred_lft = INFINITY_LIFE_TIME;
3313 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003314 }
3315
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003316 dev = __dev_get_by_index(net, ifm->ifa_index);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003317 if (dev == NULL)
3318 return -ENODEV;
3319
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003320 /* We ignore other flags so far. */
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003321 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003322
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003323 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003324 if (ifa == NULL) {
3325 /*
3326 * It would be best to check for !NLM_F_CREATE here but
3327 * userspace alreay relies on not having to provide this.
3328 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003329 return inet6_addr_add(net, ifm->ifa_index, pfx,
3330 ifm->ifa_prefixlen, ifa_flags,
3331 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003332 }
3333
Thomas Graf7198f8c2006-09-18 00:13:46 -07003334 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3335 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3336 err = -EEXIST;
3337 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003338 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003339
3340 in6_ifa_put(ifa);
3341
3342 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003343}
3344
Thomas Graf101bb222006-09-18 00:11:52 -07003345static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3346 u8 scope, int ifindex)
3347{
3348 struct ifaddrmsg *ifm;
3349
3350 ifm = nlmsg_data(nlh);
3351 ifm->ifa_family = AF_INET6;
3352 ifm->ifa_prefixlen = prefixlen;
3353 ifm->ifa_flags = flags;
3354 ifm->ifa_scope = scope;
3355 ifm->ifa_index = ifindex;
3356}
3357
Thomas Graf85486af2006-09-18 00:11:24 -07003358static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3359 unsigned long tstamp, u32 preferred, u32 valid)
3360{
3361 struct ifa_cacheinfo ci;
3362
3363 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3364 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3365 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3366 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3367 ci.ifa_prefered = preferred;
3368 ci.ifa_valid = valid;
3369
3370 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3371}
3372
Thomas Graf101bb222006-09-18 00:11:52 -07003373static inline int rt_scope(int ifa_scope)
3374{
3375 if (ifa_scope & IFA_HOST)
3376 return RT_SCOPE_HOST;
3377 else if (ifa_scope & IFA_LINK)
3378 return RT_SCOPE_LINK;
3379 else if (ifa_scope & IFA_SITE)
3380 return RT_SCOPE_SITE;
3381 else
3382 return RT_SCOPE_UNIVERSE;
3383}
3384
Thomas Graf0ab68032006-09-18 00:12:35 -07003385static inline int inet6_ifaddr_msgsize(void)
3386{
Thomas Graf339bf982006-11-10 14:10:15 -08003387 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3388 + nla_total_size(16) /* IFA_ADDRESS */
3389 + nla_total_size(sizeof(struct ifa_cacheinfo));
Thomas Graf0ab68032006-09-18 00:12:35 -07003390}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003391
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003393 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07003396 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397
Thomas Graf0ab68032006-09-18 00:12:35 -07003398 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3399 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003400 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003401
Thomas Graf101bb222006-09-18 00:11:52 -07003402 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3403 ifa->idev->dev->ifindex);
3404
Linus Torvalds1da177e2005-04-16 15:20:36 -07003405 if (!(ifa->flags&IFA_F_PERMANENT)) {
Thomas Graf85486af2006-09-18 00:11:24 -07003406 preferred = ifa->prefered_lft;
3407 valid = ifa->valid_lft;
3408 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003409 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00003410 if (preferred > tval)
3411 preferred -= tval;
3412 else
3413 preferred = 0;
Thomas Graf85486af2006-09-18 00:11:24 -07003414 if (valid != INFINITY_LIFE_TIME)
3415 valid -= tval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003416 }
3417 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07003418 preferred = INFINITY_LIFE_TIME;
3419 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003420 }
Thomas Graf85486af2006-09-18 00:11:24 -07003421
Thomas Graf0ab68032006-09-18 00:12:35 -07003422 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
Patrick McHardy26932562007-01-31 23:16:40 -08003423 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3424 nlmsg_cancel(skb, nlh);
3425 return -EMSGSIZE;
3426 }
Thomas Graf85486af2006-09-18 00:11:24 -07003427
Thomas Graf0ab68032006-09-18 00:12:35 -07003428 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003429}
3430
3431static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07003432 u32 pid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003433{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003434 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003435 u8 scope = RT_SCOPE_UNIVERSE;
3436 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437
Thomas Graf101bb222006-09-18 00:11:52 -07003438 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3439 scope = RT_SCOPE_SITE;
3440
Thomas Graf0ab68032006-09-18 00:12:35 -07003441 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3442 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003443 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003444
Thomas Graf101bb222006-09-18 00:11:52 -07003445 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003446 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3447 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003448 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3449 nlmsg_cancel(skb, nlh);
3450 return -EMSGSIZE;
3451 }
Thomas Graf85486af2006-09-18 00:11:24 -07003452
Thomas Graf0ab68032006-09-18 00:12:35 -07003453 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003454}
3455
3456static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003457 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003459 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003460 u8 scope = RT_SCOPE_UNIVERSE;
3461 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462
Thomas Graf101bb222006-09-18 00:11:52 -07003463 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3464 scope = RT_SCOPE_SITE;
3465
Thomas Graf0ab68032006-09-18 00:12:35 -07003466 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3467 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003468 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003469
Thomas Graf101bb222006-09-18 00:11:52 -07003470 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003471 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3472 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003473 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3474 nlmsg_cancel(skb, nlh);
3475 return -EMSGSIZE;
3476 }
Thomas Graf85486af2006-09-18 00:11:24 -07003477
Thomas Graf0ab68032006-09-18 00:12:35 -07003478 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479}
3480
3481enum addr_type_t
3482{
3483 UNICAST_ADDR,
3484 MULTICAST_ADDR,
3485 ANYCAST_ADDR,
3486};
3487
3488static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3489 enum addr_type_t type)
3490{
3491 int idx, ip_idx;
3492 int s_idx, s_ip_idx;
3493 int err = 1;
3494 struct net_device *dev;
3495 struct inet6_dev *idev = NULL;
3496 struct inet6_ifaddr *ifa;
3497 struct ifmcaddr6 *ifmca;
3498 struct ifacaddr6 *ifaca;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003499 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500
3501 s_idx = cb->args[0];
3502 s_ip_idx = ip_idx = cb->args[1];
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003503
Pavel Emelianov7562f872007-05-03 15:13:45 -07003504 idx = 0;
Benjamin Thery6fda7352008-03-05 10:47:47 -08003505 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003506 if (idx < s_idx)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003507 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003508 if (idx > s_idx)
3509 s_ip_idx = 0;
3510 ip_idx = 0;
3511 if ((idev = in6_dev_get(dev)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003512 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003513 read_lock_bh(&idev->lock);
3514 switch (type) {
3515 case UNICAST_ADDR:
YOSHIFUJI Hideakiae9cda52005-06-28 13:00:30 -07003516 /* unicast address incl. temp addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003517 for (ifa = idev->addr_list; ifa;
3518 ifa = ifa->if_next, ip_idx++) {
3519 if (ip_idx < s_ip_idx)
3520 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003521 err = inet6_fill_ifaddr(skb, ifa,
3522 NETLINK_CB(cb->skb).pid,
3523 cb->nlh->nlmsg_seq,
3524 RTM_NEWADDR,
3525 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003527 break;
3528 case MULTICAST_ADDR:
3529 /* multicast address */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003530 for (ifmca = idev->mc_list; ifmca;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003531 ifmca = ifmca->next, ip_idx++) {
3532 if (ip_idx < s_ip_idx)
3533 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003534 err = inet6_fill_ifmcaddr(skb, ifmca,
3535 NETLINK_CB(cb->skb).pid,
3536 cb->nlh->nlmsg_seq,
3537 RTM_GETMULTICAST,
3538 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003539 }
3540 break;
3541 case ANYCAST_ADDR:
3542 /* anycast address */
3543 for (ifaca = idev->ac_list; ifaca;
3544 ifaca = ifaca->aca_next, ip_idx++) {
3545 if (ip_idx < s_ip_idx)
3546 continue;
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003547 err = inet6_fill_ifacaddr(skb, ifaca,
3548 NETLINK_CB(cb->skb).pid,
3549 cb->nlh->nlmsg_seq,
3550 RTM_GETANYCAST,
3551 NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003552 }
3553 break;
3554 default:
3555 break;
3556 }
3557 read_unlock_bh(&idev->lock);
3558 in6_dev_put(idev);
YOSHIFUJI Hideaki5d5619b2008-01-22 17:29:40 +09003559
3560 if (err <= 0)
3561 break;
Pavel Emelianov7562f872007-05-03 15:13:45 -07003562cont:
3563 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003565 cb->args[0] = idx;
3566 cb->args[1] = ip_idx;
3567 return skb->len;
3568}
3569
3570static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3571{
3572 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003573
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574 return inet6_dump_addr(skb, cb, type);
3575}
3576
3577static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3578{
3579 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003580
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581 return inet6_dump_addr(skb, cb, type);
3582}
3583
3584
3585static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3586{
3587 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11003588
Linus Torvalds1da177e2005-04-16 15:20:36 -07003589 return inet6_dump_addr(skb, cb, type);
3590}
3591
Thomas Graf1b29fc22006-09-18 00:10:50 -07003592static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3593 void *arg)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003594{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003595 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003596 struct ifaddrmsg *ifm;
3597 struct nlattr *tb[IFA_MAX+1];
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003598 struct in6_addr *addr = NULL;
3599 struct net_device *dev = NULL;
3600 struct inet6_ifaddr *ifa;
3601 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003602 int err;
3603
Thomas Graf1b29fc22006-09-18 00:10:50 -07003604 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3605 if (err < 0)
3606 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003607
Thomas Graf1b29fc22006-09-18 00:10:50 -07003608 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3609 if (addr == NULL) {
3610 err = -EINVAL;
3611 goto errout;
3612 }
3613
3614 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003615 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003616 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003617
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003618 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07003619 err = -EADDRNOTAVAIL;
3620 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003621 }
3622
Thomas Graf0ab68032006-09-18 00:12:35 -07003623 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07003624 err = -ENOBUFS;
3625 goto errout_ifa;
3626 }
3627
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003628 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3629 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003630 if (err < 0) {
3631 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3632 WARN_ON(err == -EMSGSIZE);
3633 kfree_skb(skb);
3634 goto errout_ifa;
3635 }
Benjamin Thery6fda7352008-03-05 10:47:47 -08003636 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003637errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003638 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07003639errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003640 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09003641}
3642
Linus Torvalds1da177e2005-04-16 15:20:36 -07003643static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3644{
3645 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003646 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07003647 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648
Thomas Graf0ab68032006-09-18 00:12:35 -07003649 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07003650 if (skb == NULL)
3651 goto errout;
3652
3653 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003654 if (err < 0) {
3655 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3656 WARN_ON(err == -EMSGSIZE);
3657 kfree_skb(skb);
3658 goto errout;
3659 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08003660 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3661 return;
Thomas Graf5d620262006-08-15 00:35:02 -07003662errout:
3663 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003664 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665}
3666
Dave Jonesb6f99a22007-03-22 12:27:49 -07003667static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003668 __s32 *array, int bytes)
3669{
Thomas Graf04561c12006-11-14 19:53:58 -08003670 BUG_ON(bytes < (DEVCONF_MAX * 4));
3671
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672 memset(array, 0, bytes);
3673 array[DEVCONF_FORWARDING] = cnf->forwarding;
3674 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3675 array[DEVCONF_MTU6] = cnf->mtu6;
3676 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3677 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3678 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3679 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3680 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3681 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3682 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3683 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3684#ifdef CONFIG_IPV6_PRIVACY
3685 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3686 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3687 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3688 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3689 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3690#endif
3691 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08003692 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08003693 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08003694#ifdef CONFIG_IPV6_ROUTER_PREF
3695 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08003696 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
Neil Hormanfa03ef32007-01-30 14:30:10 -08003697#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08003698 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3699#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08003700#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07003701 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07003702 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07003703#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3704 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3705#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09003706#ifdef CONFIG_IPV6_MROUTE
3707 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3708#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09003709 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003710 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711}
3712
Thomas Graf339bf982006-11-10 14:10:15 -08003713static inline size_t inet6_if_nlmsg_size(void)
3714{
3715 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3716 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3717 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3718 + nla_total_size(4) /* IFLA_MTU */
3719 + nla_total_size(4) /* IFLA_LINK */
3720 + nla_total_size( /* IFLA_PROTINFO */
3721 nla_total_size(4) /* IFLA_INET6_FLAGS */
3722 + nla_total_size(sizeof(struct ifla_cacheinfo))
3723 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003724 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3725 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
Thomas Graf339bf982006-11-10 14:10:15 -08003726 );
3727}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003728
Herbert Xu7f7d9a62007-04-24 21:54:09 -07003729static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3730 int bytes)
3731{
3732 int i;
3733 int pad = bytes - sizeof(u64) * items;
3734 BUG_ON(pad < 0);
3735
3736 /* Use put_unaligned() because stats may not be aligned for u64. */
3737 put_unaligned(items, &stats[0]);
3738 for (i = 1; i < items; i++)
3739 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3740
3741 memset(&stats[items], 0, pad);
3742}
3743
3744static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3745 int bytes)
3746{
3747 switch(attrtype) {
3748 case IFLA_INET6_STATS:
3749 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3750 break;
3751 case IFLA_INET6_ICMP6STATS:
3752 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3753 break;
3754 }
3755}
3756
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003757static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003758 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759{
Thomas Graf04561c12006-11-14 19:53:58 -08003760 struct net_device *dev = idev->dev;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003761 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08003762 struct ifinfomsg *hdr;
3763 struct nlmsghdr *nlh;
3764 void *protoinfo;
3765 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766
Thomas Graf04561c12006-11-14 19:53:58 -08003767 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3768 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003769 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770
Thomas Graf04561c12006-11-14 19:53:58 -08003771 hdr = nlmsg_data(nlh);
3772 hdr->ifi_family = AF_INET6;
3773 hdr->__ifi_pad = 0;
3774 hdr->ifi_type = dev->type;
3775 hdr->ifi_index = dev->ifindex;
3776 hdr->ifi_flags = dev_get_flags(dev);
3777 hdr->ifi_change = 0;
3778
3779 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003780
3781 if (dev->addr_len)
Thomas Graf04561c12006-11-14 19:53:58 -08003782 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003783
Thomas Graf04561c12006-11-14 19:53:58 -08003784 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785 if (dev->ifindex != dev->iflink)
Thomas Graf04561c12006-11-14 19:53:58 -08003786 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003787
Thomas Graf04561c12006-11-14 19:53:58 -08003788 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3789 if (protoinfo == NULL)
3790 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791
Thomas Graf04561c12006-11-14 19:53:58 -08003792 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003793
Linus Torvalds1da177e2005-04-16 15:20:36 -07003794 ci.max_reasm_len = IPV6_MAXPLEN;
3795 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3796 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3797 ci.reachable_time = idev->nd_parms->reachable_time;
3798 ci.retrans_time = idev->nd_parms->retrans_time;
Thomas Graf04561c12006-11-14 19:53:58 -08003799 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3800
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003801 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3802 if (nla == NULL)
Thomas Graf04561c12006-11-14 19:53:58 -08003803 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003804 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003805
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07003806 /* XXX - MC not implemented */
3807
3808 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3809 if (nla == NULL)
3810 goto nla_put_failure;
3811 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3812
3813 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3814 if (nla == NULL)
3815 goto nla_put_failure;
3816 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003817
Thomas Graf04561c12006-11-14 19:53:58 -08003818 nla_nest_end(skb, protoinfo);
3819 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003820
Thomas Graf04561c12006-11-14 19:53:58 -08003821nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08003822 nlmsg_cancel(skb, nlh);
3823 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824}
3825
3826static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3827{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003828 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003829 int idx, err;
3830 int s_idx = cb->args[0];
3831 struct net_device *dev;
3832 struct inet6_dev *idev;
3833
3834 read_lock(&dev_base_lock);
Pavel Emelianov7562f872007-05-03 15:13:45 -07003835 idx = 0;
Benjamin Thery6fda7352008-03-05 10:47:47 -08003836 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 if (idx < s_idx)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003838 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839 if ((idev = in6_dev_get(dev)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -07003840 goto cont;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003841 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -07003842 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003843 in6_dev_put(idev);
3844 if (err <= 0)
3845 break;
Pavel Emelianov7562f872007-05-03 15:13:45 -07003846cont:
3847 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848 }
3849 read_unlock(&dev_base_lock);
3850 cb->args[0] = idx;
3851
3852 return skb->len;
3853}
3854
3855void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3856{
3857 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003858 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003859 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003860
Thomas Graf339bf982006-11-10 14:10:15 -08003861 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003862 if (skb == NULL)
3863 goto errout;
3864
3865 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003866 if (err < 0) {
3867 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3868 WARN_ON(err == -EMSGSIZE);
3869 kfree_skb(skb);
3870 goto errout;
3871 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08003872 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3873 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07003874errout:
3875 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003876 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003877}
3878
Thomas Graf339bf982006-11-10 14:10:15 -08003879static inline size_t inet6_prefix_nlmsg_size(void)
3880{
3881 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3882 + nla_total_size(sizeof(struct in6_addr))
3883 + nla_total_size(sizeof(struct prefix_cacheinfo));
3884}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003885
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Thomas Graf6051e2f2006-11-14 19:54:19 -08003887 struct prefix_info *pinfo, u32 pid, u32 seq,
3888 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003889{
Thomas Graf6051e2f2006-11-14 19:54:19 -08003890 struct prefixmsg *pmsg;
3891 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003892 struct prefix_cacheinfo ci;
3893
Thomas Graf6051e2f2006-11-14 19:54:19 -08003894 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3895 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003896 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08003897
3898 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003899 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07003900 pmsg->prefix_pad1 = 0;
3901 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003902 pmsg->prefix_ifindex = idev->dev->ifindex;
3903 pmsg->prefix_len = pinfo->prefix_len;
3904 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07003905 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003906 pmsg->prefix_flags = 0;
3907 if (pinfo->onlink)
3908 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3909 if (pinfo->autoconf)
3910 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3911
Thomas Graf6051e2f2006-11-14 19:54:19 -08003912 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913
3914 ci.preferred_time = ntohl(pinfo->prefered);
3915 ci.valid_time = ntohl(pinfo->valid);
Thomas Graf6051e2f2006-11-14 19:54:19 -08003916 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917
Thomas Graf6051e2f2006-11-14 19:54:19 -08003918 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003919
Thomas Graf6051e2f2006-11-14 19:54:19 -08003920nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08003921 nlmsg_cancel(skb, nlh);
3922 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003923}
3924
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003925static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003926 struct prefix_info *pinfo)
3927{
3928 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003929 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003930 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003931
Thomas Graf339bf982006-11-10 14:10:15 -08003932 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003933 if (skb == NULL)
3934 goto errout;
3935
3936 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08003937 if (err < 0) {
3938 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3939 WARN_ON(err == -EMSGSIZE);
3940 kfree_skb(skb);
3941 goto errout;
3942 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08003943 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3944 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07003945errout:
3946 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08003947 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003948}
3949
Linus Torvalds1da177e2005-04-16 15:20:36 -07003950static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3951{
3952 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3953
3954 switch (event) {
3955 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07003956 /*
3957 * If the address was optimistic
3958 * we inserted the route at the start of
3959 * our DAD process, so we don't need
3960 * to do it again
3961 */
3962 if (!(ifp->rt->rt6i_node))
3963 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003964 if (ifp->idev->cnf.forwarding)
3965 addrconf_join_anycast(ifp);
3966 break;
3967 case RTM_DELADDR:
3968 if (ifp->idev->cnf.forwarding)
3969 addrconf_leave_anycast(ifp);
3970 addrconf_leave_solict(ifp->idev, &ifp->addr);
3971 dst_hold(&ifp->rt->u.dst);
Thomas Grafe0a1ad732006-08-22 00:00:21 -07003972 if (ip6_del_rt(ifp->rt))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973 dst_free(&ifp->rt->u.dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003974 break;
3975 }
3976}
3977
3978static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3979{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003980 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003981 if (likely(ifp->idev->dead == 0))
3982 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003983 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984}
3985
3986#ifdef CONFIG_SYSCTL
3987
3988static
3989int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3990 void __user *buffer, size_t *lenp, loff_t *ppos)
3991{
3992 int *valp = ctl->data;
3993 int val = *valp;
3994 int ret;
3995
3996 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3997
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08003998 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00003999 ret = addrconf_fixup_forwarding(ctl, valp, val);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004000 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004001}
4002
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004003static int addrconf_sysctl_forward_strategy(ctl_table *table,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004 void __user *oldval,
4005 size_t __user *oldlenp,
Alexey Dobriyan1f29bcd2006-12-10 02:19:10 -08004006 void __user *newval, size_t newlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007{
4008 int *valp = table->data;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004009 int val = *valp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004010 int new;
4011
4012 if (!newval || !newlen)
4013 return 0;
4014 if (newlen != sizeof(int))
4015 return -EINVAL;
4016 if (get_user(new, (int __user *)newval))
4017 return -EFAULT;
4018 if (new == *valp)
4019 return 0;
4020 if (oldval && oldlenp) {
4021 size_t len;
4022 if (get_user(len, oldlenp))
4023 return -EFAULT;
4024 if (len) {
4025 if (len > table->maxlen)
4026 len = table->maxlen;
4027 if (copy_to_user(oldval, valp, len))
4028 return -EFAULT;
4029 if (put_user(len, oldlenp))
4030 return -EFAULT;
4031 }
4032 }
4033
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004034 *valp = new;
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00004035 return addrconf_fixup_forwarding(table, valp, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004036}
4037
Brian Haley56d417b2009-06-01 03:07:33 -07004038static void dev_disable_change(struct inet6_dev *idev)
4039{
4040 if (!idev || !idev->dev)
4041 return;
4042
4043 if (idev->cnf.disable_ipv6)
4044 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4045 else
4046 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4047}
4048
4049static void addrconf_disable_change(struct net *net, __s32 newf)
4050{
4051 struct net_device *dev;
4052 struct inet6_dev *idev;
4053
4054 read_lock(&dev_base_lock);
4055 for_each_netdev(net, dev) {
4056 rcu_read_lock();
4057 idev = __in6_dev_get(dev);
4058 if (idev) {
4059 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4060 idev->cnf.disable_ipv6 = newf;
4061 if (changed)
4062 dev_disable_change(idev);
4063 }
4064 rcu_read_unlock();
4065 }
4066 read_unlock(&dev_base_lock);
4067}
4068
4069static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
4070{
4071 struct net *net;
4072
4073 net = (struct net *)table->extra2;
4074
4075 if (p == &net->ipv6.devconf_dflt->disable_ipv6)
4076 return 0;
4077
4078 if (!rtnl_trylock())
4079 return restart_syscall();
4080
4081 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4082 __s32 newf = net->ipv6.devconf_all->disable_ipv6;
4083 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4084 addrconf_disable_change(net, newf);
4085 } else if ((!*p) ^ (!old))
4086 dev_disable_change((struct inet6_dev *)table->extra1);
4087
4088 rtnl_unlock();
4089 return 0;
4090}
4091
4092static
4093int addrconf_sysctl_disable(ctl_table *ctl, int write, struct file * filp,
4094 void __user *buffer, size_t *lenp, loff_t *ppos)
4095{
4096 int *valp = ctl->data;
4097 int val = *valp;
4098 int ret;
4099
4100 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
4101
4102 if (write)
4103 ret = addrconf_disable_ipv6(ctl, valp, val);
4104 return ret;
4105}
4106
Linus Torvalds1da177e2005-04-16 15:20:36 -07004107static struct addrconf_sysctl_table
4108{
4109 struct ctl_table_header *sysctl_header;
YOSHIFUJI Hideakif6a07b22008-03-25 00:25:11 +09004110 ctl_table addrconf_vars[DEVCONF_MAX+1];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004111 char *dev_name;
Brian Haleyab32ea52006-09-22 14:15:41 -07004112} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004113 .sysctl_header = NULL,
4114 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004115 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004116 .ctl_name = NET_IPV6_FORWARDING,
4117 .procname = "forwarding",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004118 .data = &ipv6_devconf.forwarding,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004119 .maxlen = sizeof(int),
4120 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004121 .proc_handler = addrconf_sysctl_forward,
4122 .strategy = addrconf_sysctl_forward_strategy,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004123 },
4124 {
4125 .ctl_name = NET_IPV6_HOP_LIMIT,
4126 .procname = "hop_limit",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004127 .data = &ipv6_devconf.hop_limit,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004128 .maxlen = sizeof(int),
4129 .mode = 0644,
4130 .proc_handler = proc_dointvec,
4131 },
4132 {
4133 .ctl_name = NET_IPV6_MTU,
4134 .procname = "mtu",
4135 .data = &ipv6_devconf.mtu6,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004136 .maxlen = sizeof(int),
Linus Torvalds1da177e2005-04-16 15:20:36 -07004137 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004138 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004139 },
4140 {
4141 .ctl_name = NET_IPV6_ACCEPT_RA,
4142 .procname = "accept_ra",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004143 .data = &ipv6_devconf.accept_ra,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004144 .maxlen = sizeof(int),
4145 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004146 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004147 },
4148 {
4149 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4150 .procname = "accept_redirects",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004151 .data = &ipv6_devconf.accept_redirects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004152 .maxlen = sizeof(int),
4153 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004154 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004155 },
4156 {
4157 .ctl_name = NET_IPV6_AUTOCONF,
4158 .procname = "autoconf",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004159 .data = &ipv6_devconf.autoconf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004160 .maxlen = sizeof(int),
4161 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004162 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163 },
4164 {
4165 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4166 .procname = "dad_transmits",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004167 .data = &ipv6_devconf.dad_transmits,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004168 .maxlen = sizeof(int),
4169 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004170 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004171 },
4172 {
4173 .ctl_name = NET_IPV6_RTR_SOLICITS,
4174 .procname = "router_solicitations",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004175 .data = &ipv6_devconf.rtr_solicits,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176 .maxlen = sizeof(int),
4177 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004178 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004179 },
4180 {
4181 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4182 .procname = "router_solicitation_interval",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004183 .data = &ipv6_devconf.rtr_solicit_interval,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004184 .maxlen = sizeof(int),
4185 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004186 .proc_handler = proc_dointvec_jiffies,
4187 .strategy = sysctl_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004188 },
4189 {
4190 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4191 .procname = "router_solicitation_delay",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004192 .data = &ipv6_devconf.rtr_solicit_delay,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193 .maxlen = sizeof(int),
4194 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004195 .proc_handler = proc_dointvec_jiffies,
4196 .strategy = sysctl_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197 },
4198 {
4199 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4200 .procname = "force_mld_version",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004201 .data = &ipv6_devconf.force_mld_version,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004202 .maxlen = sizeof(int),
4203 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004204 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205 },
4206#ifdef CONFIG_IPV6_PRIVACY
4207 {
4208 .ctl_name = NET_IPV6_USE_TEMPADDR,
4209 .procname = "use_tempaddr",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004210 .data = &ipv6_devconf.use_tempaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004211 .maxlen = sizeof(int),
4212 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004213 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004214 },
4215 {
4216 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4217 .procname = "temp_valid_lft",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004218 .data = &ipv6_devconf.temp_valid_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004219 .maxlen = sizeof(int),
4220 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004221 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004222 },
4223 {
4224 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4225 .procname = "temp_prefered_lft",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004226 .data = &ipv6_devconf.temp_prefered_lft,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004227 .maxlen = sizeof(int),
4228 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004229 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004230 },
4231 {
4232 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4233 .procname = "regen_max_retry",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004234 .data = &ipv6_devconf.regen_max_retry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004235 .maxlen = sizeof(int),
4236 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004237 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004238 },
4239 {
4240 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4241 .procname = "max_desync_factor",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004242 .data = &ipv6_devconf.max_desync_factor,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243 .maxlen = sizeof(int),
4244 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004245 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004246 },
4247#endif
4248 {
4249 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4250 .procname = "max_addresses",
4251 .data = &ipv6_devconf.max_addresses,
4252 .maxlen = sizeof(int),
4253 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004254 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004255 },
4256 {
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004257 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4258 .procname = "accept_ra_defrtr",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004259 .data = &ipv6_devconf.accept_ra_defrtr,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004260 .maxlen = sizeof(int),
4261 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004262 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004263 },
4264 {
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004265 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4266 .procname = "accept_ra_pinfo",
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004267 .data = &ipv6_devconf.accept_ra_pinfo,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004268 .maxlen = sizeof(int),
4269 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004270 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004271 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004272#ifdef CONFIG_IPV6_ROUTER_PREF
4273 {
4274 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4275 .procname = "accept_ra_rtr_pref",
4276 .data = &ipv6_devconf.accept_ra_rtr_pref,
4277 .maxlen = sizeof(int),
4278 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004279 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004280 },
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004281 {
4282 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4283 .procname = "router_probe_interval",
4284 .data = &ipv6_devconf.rtr_probe_interval,
4285 .maxlen = sizeof(int),
4286 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004287 .proc_handler = proc_dointvec_jiffies,
4288 .strategy = sysctl_jiffies,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004289 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08004290#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004291 {
4292 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4293 .procname = "accept_ra_rt_info_max_plen",
4294 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4295 .maxlen = sizeof(int),
4296 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004297 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004298 },
4299#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004300#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004301 {
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004302 .ctl_name = NET_IPV6_PROXY_NDP,
4303 .procname = "proxy_ndp",
4304 .data = &ipv6_devconf.proxy_ndp,
4305 .maxlen = sizeof(int),
4306 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004307 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004308 },
4309 {
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004310 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4311 .procname = "accept_source_route",
4312 .data = &ipv6_devconf.accept_source_route,
4313 .maxlen = sizeof(int),
4314 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004315 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004316 },
Neil Horman95c385b2007-04-25 17:08:10 -07004317#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4318 {
4319 .ctl_name = CTL_UNNUMBERED,
4320 .procname = "optimistic_dad",
4321 .data = &ipv6_devconf.optimistic_dad,
4322 .maxlen = sizeof(int),
4323 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004324 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07004325
4326 },
4327#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004328#ifdef CONFIG_IPV6_MROUTE
4329 {
4330 .ctl_name = CTL_UNNUMBERED,
4331 .procname = "mc_forwarding",
4332 .data = &ipv6_devconf.mc_forwarding,
4333 .maxlen = sizeof(int),
David S. Millera4e6db02009-01-27 22:41:03 -08004334 .mode = 0444,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004335 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004336 },
4337#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004338 {
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004339 .ctl_name = CTL_UNNUMBERED,
4340 .procname = "disable_ipv6",
4341 .data = &ipv6_devconf.disable_ipv6,
4342 .maxlen = sizeof(int),
4343 .mode = 0644,
Brian Haley56d417b2009-06-01 03:07:33 -07004344 .proc_handler = addrconf_sysctl_disable,
4345 .strategy = sysctl_intvec,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004346 },
4347 {
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004348 .ctl_name = CTL_UNNUMBERED,
4349 .procname = "accept_dad",
4350 .data = &ipv6_devconf.accept_dad,
4351 .maxlen = sizeof(int),
4352 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -08004353 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004354 },
4355 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004356 .ctl_name = 0, /* sentinel */
4357 }
4358 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004359};
4360
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004361static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4362 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004363{
4364 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004365 struct addrconf_sysctl_table *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004366
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004367#define ADDRCONF_CTL_PATH_DEV 3
4368
4369 struct ctl_path addrconf_ctl_path[] = {
4370 { .procname = "net", .ctl_name = CTL_NET, },
4371 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4372 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4373 { /* to be set */ },
4374 { },
4375 };
4376
4377
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02004378 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004379 if (t == NULL)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004380 goto out;
4381
Linus Torvalds1da177e2005-04-16 15:20:36 -07004382 for (i=0; t->addrconf_vars[i].data; i++) {
4383 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004384 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004385 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004386 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004388 /*
4389 * Make a copy of dev_name, because '.procname' is regarded as const
Linus Torvalds1da177e2005-04-16 15:20:36 -07004390 * by sysctl and we wouldn't want anyone to change it under our feet
4391 * (see SIOCSIFNAME).
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004392 */
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004393 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4394 if (!t->dev_name)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004395 goto free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004396
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004397 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4398 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004399
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004400 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004401 t->addrconf_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004402 if (t->sysctl_header == NULL)
4403 goto free_procname;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004404
4405 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08004406 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004408free_procname:
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004409 kfree(t->dev_name);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004410free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004411 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004412out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08004413 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004414}
4415
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004416static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4417{
4418 struct addrconf_sysctl_table *t;
4419
4420 if (p->sysctl == NULL)
4421 return;
4422
4423 t = p->sysctl;
4424 p->sysctl = NULL;
4425 unregister_sysctl_table(t->sysctl_header);
4426 kfree(t->dev_name);
4427 kfree(t);
4428}
4429
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004430static void addrconf_sysctl_register(struct inet6_dev *idev)
4431{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004432 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4433 NET_IPV6_NEIGH, "ipv6",
4434 &ndisc_ifinfo_sysctl_change,
YOSHIFUJI Hideaki0686caa2008-05-19 16:25:42 -07004435 ndisc_ifinfo_sysctl_strategy);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004436 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004437 idev->dev->ifindex, idev, &idev->cnf);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004438}
4439
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004440static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004441{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004442 __addrconf_sysctl_unregister(&idev->cnf);
4443 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004444}
4445
4446
4447#endif
4448
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004449static int addrconf_init_net(struct net *net)
4450{
4451 int err;
4452 struct ipv6_devconf *all, *dflt;
4453
4454 err = -ENOMEM;
4455 all = &ipv6_devconf;
4456 dflt = &ipv6_devconf_dflt;
4457
4458 if (net != &init_net) {
4459 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4460 if (all == NULL)
4461 goto err_alloc_all;
4462
4463 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4464 if (dflt == NULL)
4465 goto err_alloc_dflt;
Brian Haley56d417b2009-06-01 03:07:33 -07004466 } else {
4467 /* these will be inherited by all namespaces */
4468 dflt->autoconf = ipv6_defaults.autoconf;
4469 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004470 }
4471
4472 net->ipv6.devconf_all = all;
4473 net->ipv6.devconf_dflt = dflt;
4474
4475#ifdef CONFIG_SYSCTL
4476 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4477 NULL, all);
4478 if (err < 0)
4479 goto err_reg_all;
4480
4481 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4482 NULL, dflt);
4483 if (err < 0)
4484 goto err_reg_dflt;
4485#endif
4486 return 0;
4487
4488#ifdef CONFIG_SYSCTL
4489err_reg_dflt:
4490 __addrconf_sysctl_unregister(all);
4491err_reg_all:
4492 kfree(dflt);
4493#endif
4494err_alloc_dflt:
4495 kfree(all);
4496err_alloc_all:
4497 return err;
4498}
4499
4500static void addrconf_exit_net(struct net *net)
4501{
4502#ifdef CONFIG_SYSCTL
4503 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4504 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4505#endif
4506 if (net != &init_net) {
4507 kfree(net->ipv6.devconf_dflt);
4508 kfree(net->ipv6.devconf_all);
4509 }
4510}
4511
4512static struct pernet_operations addrconf_ops = {
4513 .init = addrconf_init_net,
4514 .exit = addrconf_exit_net,
4515};
4516
Linus Torvalds1da177e2005-04-16 15:20:36 -07004517/*
4518 * Device notifier
4519 */
4520
4521int register_inet6addr_notifier(struct notifier_block *nb)
4522{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004523 return atomic_notifier_chain_register(&inet6addr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004524}
4525
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09004526EXPORT_SYMBOL(register_inet6addr_notifier);
4527
Linus Torvalds1da177e2005-04-16 15:20:36 -07004528int unregister_inet6addr_notifier(struct notifier_block *nb)
4529{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004530 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004531}
4532
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09004533EXPORT_SYMBOL(unregister_inet6addr_notifier);
4534
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535/*
4536 * Init / cleanup code
4537 */
4538
4539int __init addrconf_init(void)
4540{
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09004541 int err;
4542
4543 if ((err = ipv6_addr_label_init()) < 0) {
4544 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4545 err);
4546 return err;
4547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004549 register_pernet_subsys(&addrconf_ops);
4550
Linus Torvalds1da177e2005-04-16 15:20:36 -07004551 /* The addrconf netdev notifier requires that loopback_dev
4552 * has it's ipv6 private information allocated and setup
4553 * before it can bring up and give link-local addresses
4554 * to other devices which are up.
4555 *
4556 * Unfortunately, loopback_dev is not necessarily the first
4557 * entry in the global dev_base list of net devices. In fact,
4558 * it is likely to be the very last entry on that list.
4559 * So this causes the notifier registry below to try and
4560 * give link-local addresses to all devices besides loopback_dev
4561 * first, then loopback_dev, which cases all the non-loopback_dev
4562 * devices to fail to get a link-local address.
4563 *
4564 * So, as a temporary fix, allocate the ipv6 structure for
4565 * loopback_dev first by hand.
4566 * Longer term, all of the dependencies ipv6 has upon the loopback
4567 * device and it being up should be removed.
4568 */
4569 rtnl_lock();
Eric W. Biederman2774c7a2007-09-26 22:10:56 -07004570 if (!ipv6_add_dev(init_net.loopback_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004571 err = -ENOMEM;
4572 rtnl_unlock();
4573 if (err)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004574 goto errlo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004575
4576 register_netdevice_notifier(&ipv6_dev_notf);
4577
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578 addrconf_verify(0);
Thomas Grafc127ea22007-03-22 11:58:32 -07004579
4580 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4581 if (err < 0)
4582 goto errout;
4583
4584 /* Only the first call to __rtnl_register can fail */
4585 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4586 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4587 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4588 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4589 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4590
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09004591 ipv6_addr_label_rtnl_register();
4592
Linus Torvalds1da177e2005-04-16 15:20:36 -07004593 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07004594errout:
4595 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004596errlo:
4597 unregister_pernet_subsys(&addrconf_ops);
Thomas Grafc127ea22007-03-22 11:58:32 -07004598
4599 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600}
4601
Daniel Lezcano09f77092007-12-13 05:34:58 -08004602void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004603{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004604 struct inet6_ifaddr *ifa;
Daniel Lezcano176c39a2009-03-03 01:06:45 -08004605 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004606 int i;
4607
4608 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004609 unregister_pernet_subsys(&addrconf_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004610
4611 rtnl_lock();
4612
Daniel Lezcano176c39a2009-03-03 01:06:45 -08004613 /* clean dev list */
4614 for_each_netdev(&init_net, dev) {
4615 if (__in6_dev_get(dev) == NULL)
4616 continue;
4617 addrconf_ifdown(dev, 1);
4618 }
4619 addrconf_ifdown(init_net.loopback_dev, 2);
4620
Linus Torvalds1da177e2005-04-16 15:20:36 -07004621 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004622 * Check hash table.
4623 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004624 write_lock_bh(&addrconf_hash_lock);
4625 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4626 for (ifa=inet6_addr_lst[i]; ifa; ) {
4627 struct inet6_ifaddr *bifa;
4628
4629 bifa = ifa;
4630 ifa = ifa->lst_next;
4631 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4632 /* Do not free it; something is wrong.
4633 Now we can investigate it with debugger.
4634 */
4635 }
4636 }
4637 write_unlock_bh(&addrconf_hash_lock);
4638
4639 del_timer(&addr_chk_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004640 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004641}