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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
4#define RETRANS_TIMER HZ
5
6#define MAX_RTR_SOLICITATIONS 3
7#define RTR_SOLICITATION_INTERVAL (4*HZ)
8
9#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
10
11#define TEMP_VALID_LIFETIME (7*86400)
12#define TEMP_PREFERRED_LIFETIME (86400)
13#define REGEN_MAX_RETRY (5)
14#define MAX_DESYNC_FACTOR (600)
15
16#define ADDR_CHECK_FREQUENCY (120*HZ)
17
18#define IPV6_MAX_ADDRESSES 16
19
Fred L. Templinc7dc89c2007-11-29 22:11:40 +110020#include <linux/in.h>
Patrick McHardy6a800d42005-05-03 22:17:18 -070021#include <linux/in6.h>
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023struct prefix_info {
24 __u8 type;
25 __u8 length;
26 __u8 prefix_len;
27
28#if defined(__BIG_ENDIAN_BITFIELD)
29 __u8 onlink : 1,
30 autoconf : 1,
31 reserved : 6;
32#elif defined(__LITTLE_ENDIAN_BITFIELD)
33 __u8 reserved : 6,
34 autoconf : 1,
35 onlink : 1;
36#else
37#error "Please fix <asm/byteorder.h>"
38#endif
Al Viroe69a4ad2006-11-14 20:56:00 -080039 __be32 valid;
40 __be32 prefered;
41 __be32 reserved2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43 struct in6_addr prefix;
44};
45
46
47#ifdef __KERNEL__
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
53#define IN6_ADDR_HSIZE 16
54
55extern int addrconf_init(void);
56extern void addrconf_cleanup(void);
57
Daniel Lezcanoaf284932008-03-05 10:46:57 -080058extern int addrconf_add_ifaddr(struct net *net,
59 void __user *arg);
60extern int addrconf_del_ifaddr(struct net *net,
61 void __user *arg);
62extern int addrconf_set_dstaddr(struct net *net,
63 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Daniel Lezcanobfeade02008-01-10 22:43:18 -080065extern int ipv6_chk_addr(struct net *net,
66 struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 struct net_device *dev,
68 int strict);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080069
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -070070#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Daniel Lezcano389f6612008-01-10 22:44:40 -080071extern int ipv6_chk_home_addr(struct net *net,
72 struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070073#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040074
75extern int ipv6_chk_prefix(struct in6_addr *addr,
76 struct net_device *dev);
77
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080078extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090079 const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080080 struct net_device *dev,
81 int strict);
82
Brian Haley191cd582008-08-14 15:33:21 -070083extern int ipv6_dev_get_saddr(struct net *net,
84 struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090085 const struct in6_addr *daddr,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090086 unsigned int srcprefs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 struct in6_addr *saddr);
Neil Horman95c385b2007-04-25 17:08:10 -070088extern int ipv6_get_lladdr(struct net_device *dev,
89 struct in6_addr *addr,
90 unsigned char banned_flags);
Vlad Yasevichb2f5e7c2009-03-24 16:24:51 +000091extern int ipv6_rcv_saddr_equal(const struct sock *sk,
92 const struct sock *sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093extern void addrconf_join_solict(struct net_device *dev,
94 struct in6_addr *addr);
95extern void addrconf_leave_solict(struct inet6_dev *idev,
96 struct in6_addr *addr);
97
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090098static inline unsigned long addrconf_timeout_fixup(u32 timeout,
99 unsigned unit)
100{
101 if (timeout == 0xffffffff)
102 return ~0UL;
103
104 /*
105 * Avoid arithmetic overflow.
106 * Assuming unit is constant and non-zero, this "if" statement
107 * will go away on 64bit archs.
108 */
109 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
110 return LONG_MAX / unit;
111
112 return timeout;
113}
114
115static inline int addrconf_finite_timeout(unsigned long timeout)
116{
117 return ~timeout;
118}
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900121 * IPv6 Address Label subsystem (addrlabel.c)
122 */
123extern int ipv6_addr_label_init(void);
Neil Horman2cc6d2b2010-09-24 09:55:52 +0000124extern void ipv6_addr_label_cleanup(void);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900125extern void ipv6_addr_label_rtnl_register(void);
Benjamin Thery3de23252008-05-28 14:51:24 +0200126extern u32 ipv6_addr_label(struct net *net,
127 const struct in6_addr *addr,
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900128 int type, int ifindex);
129
130/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 * multicast prototypes (mcast.c)
132 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900133extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
134 const struct in6_addr *addr);
135extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
136 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137extern void ipv6_sock_mc_close(struct sock *sk);
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900138extern int inet6_mc_check(struct sock *sk,
139 const struct in6_addr *mc_addr,
140 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900142extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
143extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
144extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145extern void ipv6_mc_up(struct inet6_dev *idev);
146extern void ipv6_mc_down(struct inet6_dev *idev);
Moni Shoua75c78502009-09-15 02:37:40 -0700147extern void ipv6_mc_unmap(struct inet6_dev *idev);
148extern void ipv6_mc_remap(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149extern void ipv6_mc_init_dev(struct inet6_dev *idev);
150extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
151extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
152
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900153extern int ipv6_chk_mcast_addr(struct net_device *dev,
154 const struct in6_addr *group,
155 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
157
158extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160/*
161 * anycast prototypes (anycast.c)
162 */
163extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
164extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
165extern void ipv6_sock_ac_close(struct sock *sk);
166extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
167
168extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
169extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700170extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
171 struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173
174/* Device notifier */
175extern int register_inet6addr_notifier(struct notifier_block *nb);
176extern int unregister_inet6addr_notifier(struct notifier_block *nb);
177
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000178/**
179 * __in6_dev_get - get inet6_dev pointer from netdevice
180 * @dev: network device
181 *
182 * Caller must hold rcu_read_lock or RTNL, because this function
183 * does not take a reference on the inet6_dev.
184 */
185static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000187 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188}
189
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000190/**
191 * in6_dev_get - get inet6_dev pointer from netdevice
192 * @dev: network device
193 *
194 * This version can be used in any context, and takes a reference
195 * on the inet6_dev. Callers must use in6_dev_put() later to
196 * release this reference.
197 */
198static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000200 struct inet6_dev *idev;
201
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700202 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000203 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 if (idev)
205 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700206 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 return idev;
208}
209
210extern void in6_dev_finish_destroy(struct inet6_dev *idev);
211
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000212static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
214 if (atomic_dec_and_test(&idev->refcnt))
215 in6_dev_finish_destroy(idev);
216}
217
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000218static inline void __in6_dev_put(struct inet6_dev *idev)
219{
220 atomic_dec(&idev->refcnt);
221}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000223static inline void in6_dev_hold(struct inet6_dev *idev)
224{
225 atomic_inc(&idev->refcnt);
226}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
229
230static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
231{
232 if (atomic_dec_and_test(&ifp->refcnt))
233 inet6_ifa_finish_destroy(ifp);
234}
235
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000236static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
237{
238 atomic_dec(&ifp->refcnt);
239}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000241static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
242{
243 atomic_inc(&ifp->refcnt);
244}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247/*
248 * compute link-local solicited-node multicast address
249 */
250
251static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
252 struct in6_addr *solicited)
253{
254 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900255 htonl(0xFF020000), 0,
256 htonl(0x1),
257 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258}
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
261{
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900262 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
265static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
266{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000267 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900268 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000269 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270}
271
272static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
273{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000274 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900275 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000276 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100279static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
280{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000281 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100282}
283
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300284#ifdef CONFIG_PROC_FS
285extern int if6_proc_init(void);
286extern void if6_proc_exit(void);
287#endif
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289#endif
290#endif