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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)
11#define REGEN_MAX_RETRY (5)
12#define MAX_DESYNC_FACTOR (600)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
Fred L. Templinc7dc89c2007-11-29 22:11:40 +110018#include <linux/in.h>
Patrick McHardy6a800d42005-05-03 22:17:18 -070019#include <linux/in6.h>
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021struct prefix_info {
22 __u8 type;
23 __u8 length;
24 __u8 prefix_len;
25
26#if defined(__BIG_ENDIAN_BITFIELD)
27 __u8 onlink : 1,
28 autoconf : 1,
29 reserved : 6;
30#elif defined(__LITTLE_ENDIAN_BITFIELD)
31 __u8 reserved : 6,
32 autoconf : 1,
33 onlink : 1;
34#else
35#error "Please fix <asm/byteorder.h>"
36#endif
Al Viroe69a4ad2006-11-14 20:56:00 -080037 __be32 valid;
38 __be32 prefered;
39 __be32 reserved2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41 struct in6_addr prefix;
42};
43
44
45#ifdef __KERNEL__
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/netdevice.h>
48#include <net/if_inet6.h>
Herbert Xue4553ed2005-05-03 14:25:13 -070049#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#define IN6_ADDR_HSIZE 16
52
53extern int addrconf_init(void);
54extern void addrconf_cleanup(void);
55
Daniel Lezcanoaf284932008-03-05 10:46:57 -080056extern int addrconf_add_ifaddr(struct net *net,
57 void __user *arg);
58extern int addrconf_del_ifaddr(struct net *net,
59 void __user *arg);
60extern int addrconf_set_dstaddr(struct net *net,
61 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Daniel Lezcanobfeade02008-01-10 22:43:18 -080063extern int ipv6_chk_addr(struct net *net,
64 struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 struct net_device *dev,
66 int strict);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080067
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -070068#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Daniel Lezcano389f6612008-01-10 22:44:40 -080069extern int ipv6_chk_home_addr(struct net *net,
70 struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070071#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040072
73extern int ipv6_chk_prefix(struct in6_addr *addr,
74 struct net_device *dev);
75
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080076extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090077 const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080078 struct net_device *dev,
79 int strict);
80
Brian Haley191cd582008-08-14 15:33:21 -070081extern int ipv6_dev_get_saddr(struct net *net,
82 struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090083 const struct in6_addr *daddr,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090084 unsigned int srcprefs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct in6_addr *saddr);
Neil Horman95c385b2007-04-25 17:08:10 -070086extern int ipv6_get_lladdr(struct net_device *dev,
87 struct in6_addr *addr,
88 unsigned char banned_flags);
Vlad Yasevichb2f5e7c2009-03-24 16:24:51 +000089extern int ipv6_rcv_saddr_equal(const struct sock *sk,
90 const struct sock *sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091extern void addrconf_join_solict(struct net_device *dev,
92 struct in6_addr *addr);
93extern void addrconf_leave_solict(struct inet6_dev *idev,
94 struct in6_addr *addr);
95
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090096static inline unsigned long addrconf_timeout_fixup(u32 timeout,
97 unsigned unit)
98{
99 if (timeout == 0xffffffff)
100 return ~0UL;
101
102 /*
103 * Avoid arithmetic overflow.
104 * Assuming unit is constant and non-zero, this "if" statement
105 * will go away on 64bit archs.
106 */
107 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
108 return LONG_MAX / unit;
109
110 return timeout;
111}
112
113static inline int addrconf_finite_timeout(unsigned long timeout)
114{
115 return ~timeout;
116}
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900119 * IPv6 Address Label subsystem (addrlabel.c)
120 */
121extern int ipv6_addr_label_init(void);
Neil Horman2cc6d2b2010-09-24 09:55:52 +0000122extern void ipv6_addr_label_cleanup(void);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900123extern void ipv6_addr_label_rtnl_register(void);
Benjamin Thery3de23252008-05-28 14:51:24 +0200124extern u32 ipv6_addr_label(struct net *net,
125 const struct in6_addr *addr,
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900126 int type, int ifindex);
127
128/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 * multicast prototypes (mcast.c)
130 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900131extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
132 const struct in6_addr *addr);
133extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
134 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135extern void ipv6_sock_mc_close(struct sock *sk);
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900136extern int inet6_mc_check(struct sock *sk,
137 const struct in6_addr *mc_addr,
138 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900140extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
141extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
142extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143extern void ipv6_mc_up(struct inet6_dev *idev);
144extern void ipv6_mc_down(struct inet6_dev *idev);
Moni Shoua75c78502009-09-15 02:37:40 -0700145extern void ipv6_mc_unmap(struct inet6_dev *idev);
146extern void ipv6_mc_remap(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147extern void ipv6_mc_init_dev(struct inet6_dev *idev);
148extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
149extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
150
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900151extern int ipv6_chk_mcast_addr(struct net_device *dev,
152 const struct in6_addr *group,
153 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
155
156extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158/*
159 * anycast prototypes (anycast.c)
160 */
161extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
162extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
163extern void ipv6_sock_ac_close(struct sock *sk);
164extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
165
166extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
167extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700168extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
169 struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171
172/* Device notifier */
173extern int register_inet6addr_notifier(struct notifier_block *nb);
174extern int unregister_inet6addr_notifier(struct notifier_block *nb);
175
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000176/**
177 * __in6_dev_get - get inet6_dev pointer from netdevice
178 * @dev: network device
179 *
180 * Caller must hold rcu_read_lock or RTNL, because this function
181 * does not take a reference on the inet6_dev.
182 */
183static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000185 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000188/**
189 * in6_dev_get - get inet6_dev pointer from netdevice
190 * @dev: network device
191 *
192 * This version can be used in any context, and takes a reference
193 * on the inet6_dev. Callers must use in6_dev_put() later to
194 * release this reference.
195 */
196static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000198 struct inet6_dev *idev;
199
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700200 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000201 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 if (idev)
203 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700204 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 return idev;
206}
207
208extern void in6_dev_finish_destroy(struct inet6_dev *idev);
209
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000210static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
212 if (atomic_dec_and_test(&idev->refcnt))
213 in6_dev_finish_destroy(idev);
214}
215
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000216static inline void __in6_dev_put(struct inet6_dev *idev)
217{
218 atomic_dec(&idev->refcnt);
219}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000221static inline void in6_dev_hold(struct inet6_dev *idev)
222{
223 atomic_inc(&idev->refcnt);
224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
227
228static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
229{
230 if (atomic_dec_and_test(&ifp->refcnt))
231 inet6_ifa_finish_destroy(ifp);
232}
233
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000234static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
235{
236 atomic_dec(&ifp->refcnt);
237}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000239static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
240{
241 atomic_inc(&ifp->refcnt);
242}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245/*
246 * compute link-local solicited-node multicast address
247 */
248
249static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
250 struct in6_addr *solicited)
251{
252 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900253 htonl(0xFF020000), 0,
254 htonl(0x1),
255 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
259{
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900260 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
263static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
264{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000265 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900266 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000267 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268}
269
270static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
271{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000272 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900273 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000274 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275}
276
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100277static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
278{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000279 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100280}
281
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300282#ifdef CONFIG_PROC_FS
283extern int if6_proc_init(void);
284extern void if6_proc_exit(void);
285#endif
286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287#endif
288#endif