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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#define MAX_RTR_SOLICITATIONS 3
5#define RTR_SOLICITATION_INTERVAL (4*HZ)
6
7#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
8
9#define TEMP_VALID_LIFETIME (7*86400)
10#define TEMP_PREFERRED_LIFETIME (86400)
Lorenzo Colitti76f793e2011-07-26 13:50:49 +000011#define REGEN_MAX_RETRY (3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#define MAX_DESYNC_FACTOR (600)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
Jiri Pirko5c766d62013-01-24 09:41:41 +000018#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
19#define ADDRCONF_TIMER_FUZZ (HZ / 4)
20#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
21
Fred L. Templinc7dc89c2007-11-29 22:11:40 +110022#include <linux/in.h>
Patrick McHardy6a800d42005-05-03 22:17:18 -070023#include <linux/in6.h>
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025struct prefix_info {
26 __u8 type;
27 __u8 length;
28 __u8 prefix_len;
29
30#if defined(__BIG_ENDIAN_BITFIELD)
31 __u8 onlink : 1,
32 autoconf : 1,
33 reserved : 6;
34#elif defined(__LITTLE_ENDIAN_BITFIELD)
35 __u8 reserved : 6,
36 autoconf : 1,
37 onlink : 1;
38#else
39#error "Please fix <asm/byteorder.h>"
40#endif
Al Viroe69a4adc2006-11-14 20:56:00 -080041 __be32 valid;
42 __be32 prefered;
43 __be32 reserved2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 struct in6_addr prefix;
46};
47
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/netdevice.h>
50#include <net/if_inet6.h>
Herbert Xue4553ed2005-05-03 14:25:13 -070051#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Eric Dumazetddbe5032012-07-18 08:11:12 +000053#define IN6_ADDR_HSIZE_SHIFT 4
54#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Joe Perchese8e54d32013-07-31 17:31:32 -070056int addrconf_init(void);
57void addrconf_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Joe Perchese8e54d32013-07-31 17:31:32 -070059int addrconf_add_ifaddr(struct net *net, void __user *arg);
60int addrconf_del_ifaddr(struct net *net, void __user *arg);
61int addrconf_set_dstaddr(struct net *net, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Joe Perchese8e54d32013-07-31 17:31:32 -070063int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
64 const struct net_device *dev, int strict);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080065
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -070066#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Joe Perchese8e54d32013-07-31 17:31:32 -070067int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070068#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040069
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +030070bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
71 const unsigned int prefix_len,
72 struct net_device *dev);
73
Joe Perchese8e54d32013-07-31 17:31:32 -070074int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040075
Joe Perchese8e54d32013-07-31 17:31:32 -070076struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
77 const struct in6_addr *addr,
78 struct net_device *dev, int strict);
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080079
Joe Perchese8e54d32013-07-31 17:31:32 -070080int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
81 const struct in6_addr *daddr, unsigned int srcprefs,
82 struct in6_addr *saddr);
83int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +010084 u32 banned_flags);
Joe Perchese8e54d32013-07-31 17:31:32 -070085int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +010086 u32 banned_flags);
Joe Perchese8e54d32013-07-31 17:31:32 -070087int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
88void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
89void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090091static inline unsigned long addrconf_timeout_fixup(u32 timeout,
Eric Dumazet95c96172012-04-15 05:58:06 +000092 unsigned int unit)
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090093{
94 if (timeout == 0xffffffff)
95 return ~0UL;
96
97 /*
98 * Avoid arithmetic overflow.
99 * Assuming unit is constant and non-zero, this "if" statement
100 * will go away on 64bit archs.
101 */
102 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
103 return LONG_MAX / unit;
104
105 return timeout;
106}
107
108static inline int addrconf_finite_timeout(unsigned long timeout)
109{
110 return ~timeout;
111}
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900114 * IPv6 Address Label subsystem (addrlabel.c)
115 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700116int ipv6_addr_label_init(void);
117void ipv6_addr_label_cleanup(void);
118void ipv6_addr_label_rtnl_register(void);
119u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
120 int type, int ifindex);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900121
122/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 * multicast prototypes (mcast.c)
124 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700125int ipv6_sock_mc_join(struct sock *sk, int ifindex,
126 const struct in6_addr *addr);
127int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
128 const struct in6_addr *addr);
129void ipv6_sock_mc_close(struct sock *sk);
130bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
131 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Joe Perchese8e54d32013-07-31 17:31:32 -0700133int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
134int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
135int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
136void ipv6_mc_up(struct inet6_dev *idev);
137void ipv6_mc_down(struct inet6_dev *idev);
138void ipv6_mc_unmap(struct inet6_dev *idev);
139void ipv6_mc_remap(struct inet6_dev *idev);
140void ipv6_mc_init_dev(struct inet6_dev *idev);
141void ipv6_mc_destroy_dev(struct inet6_dev *idev);
142void addrconf_dad_failure(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Joe Perchese8e54d32013-07-31 17:31:32 -0700144bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
145 const struct in6_addr *src_addr);
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000146
Joe Perchese8e54d32013-07-31 17:31:32 -0700147void ipv6_mc_dad_complete(struct inet6_dev *idev);
Cong Wang5f81bd22013-08-31 13:44:30 +0800148
149/* A stub used by vxlan module. This is ugly, ideally these
150 * symbols should be built into the core kernel.
151 */
152struct ipv6_stub {
153 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
154 const struct in6_addr *addr);
155 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
156 const struct in6_addr *addr);
157 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
158 struct flowi6 *fl6);
159 void (*udpv6_encap_enable)(void);
Cong Wangf564f452013-08-31 13:44:36 +0800160 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
161 const struct in6_addr *daddr,
162 const struct in6_addr *solicited_addr,
163 bool router, bool solicited, bool override, bool inc_opt);
Cong Wange15a00a2013-08-31 13:44:34 +0800164 struct neigh_table *nd_tbl;
Cong Wang5f81bd22013-08-31 13:44:30 +0800165};
166extern const struct ipv6_stub *ipv6_stub __read_mostly;
167
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000168/*
169 * identify MLD packets for MLD filter exceptions
170 */
171static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
172{
173 struct icmp6hdr *hdr;
174
175 if (nexthdr != IPPROTO_ICMPV6 ||
176 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
177 return false;
178
179 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
180
181 switch (hdr->icmp6_type) {
182 case ICMPV6_MGM_QUERY:
183 case ICMPV6_MGM_REPORT:
184 case ICMPV6_MGM_REDUCTION:
185 case ICMPV6_MLD2_REPORT:
186 return true;
187 default:
188 break;
189 }
190 return false;
191}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Joe Perchese8e54d32013-07-31 17:31:32 -0700193void addrconf_prefix_rcv(struct net_device *dev,
194 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196/*
197 * anycast prototypes (anycast.c)
198 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700199int ipv6_sock_ac_join(struct sock *sk, int ifindex,
200 const struct in6_addr *addr);
201int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
202 const struct in6_addr *addr);
203void ipv6_sock_ac_close(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Joe Perchese8e54d32013-07-31 17:31:32 -0700205int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
206int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
207bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
FX Le Bail7c90cc22014-01-22 07:42:37 +0100208 const struct in6_addr *addr);
209bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
210 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212/* Device notifier */
Joe Perchese8e54d32013-07-31 17:31:32 -0700213int register_inet6addr_notifier(struct notifier_block *nb);
214int unregister_inet6addr_notifier(struct notifier_block *nb);
215int inet6addr_notifier_call_chain(unsigned long val, void *v);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Joe Perchese8e54d32013-07-31 17:31:32 -0700217void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
218 struct ipv6_devconf *devconf);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000219
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000220/**
221 * __in6_dev_get - get inet6_dev pointer from netdevice
222 * @dev: network device
223 *
224 * Caller must hold rcu_read_lock or RTNL, because this function
225 * does not take a reference on the inet6_dev.
226 */
227static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000229 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000232/**
233 * in6_dev_get - get inet6_dev pointer from netdevice
234 * @dev: network device
235 *
236 * This version can be used in any context, and takes a reference
237 * on the inet6_dev. Callers must use in6_dev_put() later to
238 * release this reference.
239 */
240static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000242 struct inet6_dev *idev;
243
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700244 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000245 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 if (idev)
247 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700248 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 return idev;
250}
251
Jiri Pirkobba24892013-12-07 19:26:57 +0100252static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
253{
254 struct inet6_dev *idev = __in6_dev_get(dev);
255
256 return idev ? idev->nd_parms : NULL;
257}
258
Joe Perchese8e54d32013-07-31 17:31:32 -0700259void in6_dev_finish_destroy(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000261static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
263 if (atomic_dec_and_test(&idev->refcnt))
264 in6_dev_finish_destroy(idev);
265}
266
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000267static inline void __in6_dev_put(struct inet6_dev *idev)
268{
269 atomic_dec(&idev->refcnt);
270}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000272static inline void in6_dev_hold(struct inet6_dev *idev)
273{
274 atomic_inc(&idev->refcnt);
275}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Joe Perchese8e54d32013-07-31 17:31:32 -0700277void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
280{
281 if (atomic_dec_and_test(&ifp->refcnt))
282 inet6_ifa_finish_destroy(ifp);
283}
284
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000285static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
286{
287 atomic_dec(&ifp->refcnt);
288}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000290static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
291{
292 atomic_inc(&ifp->refcnt);
293}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296/*
297 * compute link-local solicited-node multicast address
298 */
299
300static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
301 struct in6_addr *solicited)
302{
303 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900304 htonl(0xFF020000), 0,
305 htonl(0x1),
306 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900309static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000311#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100312 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000313 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
314#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000315 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900316 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000317 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000318#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319}
320
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900321static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000323#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100324 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000325 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
326#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000327 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900328 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000329 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000330#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331}
332
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900333static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100334{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000335 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100336}
337
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000338static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
339{
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000340#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100341 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000342 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
343 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
344 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
345#else
346 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
347 addr->s6_addr32[1] |
348 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
349 (addr->s6_addr[12] ^ 0xff)) == 0;
350#endif
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000351}
352
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300353#ifdef CONFIG_PROC_FS
Joe Perchese8e54d32013-07-31 17:31:32 -0700354int if6_proc_init(void);
355void if6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300356#endif
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358#endif