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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
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 Viroe69a4adc2006-11-14 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/netdevice.h>
46#include <net/if_inet6.h>
Herbert Xue4553ed2005-05-03 14:25:13 -070047#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#define IN6_ADDR_HSIZE 16
50
51extern int addrconf_init(void);
52extern void addrconf_cleanup(void);
53
Daniel Lezcanoaf284932008-03-05 10:46:57 -080054extern int addrconf_add_ifaddr(struct net *net,
55 void __user *arg);
56extern int addrconf_del_ifaddr(struct net *net,
57 void __user *arg);
58extern int addrconf_set_dstaddr(struct net *net,
59 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Daniel Lezcanobfeade02008-01-10 22:43:18 -080061extern int ipv6_chk_addr(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000062 const struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 struct net_device *dev,
64 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)
Daniel Lezcano389f6612008-01-10 22:44:40 -080067extern int ipv6_chk_home_addr(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000068 const struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070069#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040070
Eric Dumazetb71d1d42011-04-22 04:53:02 +000071extern int ipv6_chk_prefix(const struct in6_addr *addr,
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040072 struct net_device *dev);
73
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080074extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090075 const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080076 struct net_device *dev,
77 int strict);
78
Brian Haley191cd582008-08-14 15:33:21 -070079extern int ipv6_dev_get_saddr(struct net *net,
80 struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090081 const struct in6_addr *daddr,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090082 unsigned int srcprefs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct in6_addr *saddr);
Neil Horman95c385b2007-04-25 17:08:10 -070084extern int ipv6_get_lladdr(struct net_device *dev,
85 struct in6_addr *addr,
86 unsigned char banned_flags);
Vlad Yasevichb2f5e7c2009-03-24 16:24:51 +000087extern int ipv6_rcv_saddr_equal(const struct sock *sk,
88 const struct sock *sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089extern void addrconf_join_solict(struct net_device *dev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000090 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091extern void addrconf_leave_solict(struct inet6_dev *idev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000092 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090094static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95 unsigned unit)
96{
97 if (timeout == 0xffffffff)
98 return ~0UL;
99
100 /*
101 * Avoid arithmetic overflow.
102 * Assuming unit is constant and non-zero, this "if" statement
103 * will go away on 64bit archs.
104 */
105 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
106 return LONG_MAX / unit;
107
108 return timeout;
109}
110
111static inline int addrconf_finite_timeout(unsigned long timeout)
112{
113 return ~timeout;
114}
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900117 * IPv6 Address Label subsystem (addrlabel.c)
118 */
119extern int ipv6_addr_label_init(void);
Neil Horman2cc6d2b2010-09-24 09:55:52 +0000120extern void ipv6_addr_label_cleanup(void);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900121extern void ipv6_addr_label_rtnl_register(void);
Benjamin Thery3de23252008-05-28 14:51:24 +0200122extern u32 ipv6_addr_label(struct net *net,
123 const struct in6_addr *addr,
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900124 int type, int ifindex);
125
126/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 * multicast prototypes (mcast.c)
128 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900129extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
130 const struct in6_addr *addr);
131extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
132 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133extern void ipv6_sock_mc_close(struct sock *sk);
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900134extern int inet6_mc_check(struct sock *sk,
135 const struct in6_addr *mc_addr,
136 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900138extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
139extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
140extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141extern void ipv6_mc_up(struct inet6_dev *idev);
142extern void ipv6_mc_down(struct inet6_dev *idev);
Moni Shoua75c78502009-09-15 02:37:40 -0700143extern void ipv6_mc_unmap(struct inet6_dev *idev);
144extern void ipv6_mc_remap(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145extern void ipv6_mc_init_dev(struct inet6_dev *idev);
146extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
147extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
148
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900149extern int ipv6_chk_mcast_addr(struct net_device *dev,
150 const struct in6_addr *group,
151 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
153
Neil Hormane6bff992012-01-04 10:49:15 +0000154extern void addrconf_prefix_rcv(struct net_device *dev,
155 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157/*
158 * anycast prototypes (anycast.c)
159 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000160extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
161extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162extern void ipv6_sock_ac_close(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000164extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
165extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700166extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000167 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169
170/* Device notifier */
171extern int register_inet6addr_notifier(struct notifier_block *nb);
172extern int unregister_inet6addr_notifier(struct notifier_block *nb);
173
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000174/**
175 * __in6_dev_get - get inet6_dev pointer from netdevice
176 * @dev: network device
177 *
178 * Caller must hold rcu_read_lock or RTNL, because this function
179 * does not take a reference on the inet6_dev.
180 */
181static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000183 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
185
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000186/**
187 * in6_dev_get - get inet6_dev pointer from netdevice
188 * @dev: network device
189 *
190 * This version can be used in any context, and takes a reference
191 * on the inet6_dev. Callers must use in6_dev_put() later to
192 * release this reference.
193 */
194static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000196 struct inet6_dev *idev;
197
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700198 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000199 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (idev)
201 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700202 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 return idev;
204}
205
206extern void in6_dev_finish_destroy(struct inet6_dev *idev);
207
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000208static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
210 if (atomic_dec_and_test(&idev->refcnt))
211 in6_dev_finish_destroy(idev);
212}
213
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000214static inline void __in6_dev_put(struct inet6_dev *idev)
215{
216 atomic_dec(&idev->refcnt);
217}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000219static inline void in6_dev_hold(struct inet6_dev *idev)
220{
221 atomic_inc(&idev->refcnt);
222}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
225
226static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
227{
228 if (atomic_dec_and_test(&ifp->refcnt))
229 inet6_ifa_finish_destroy(ifp);
230}
231
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000232static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
233{
234 atomic_dec(&ifp->refcnt);
235}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000237static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
238{
239 atomic_inc(&ifp->refcnt);
240}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243/*
244 * compute link-local solicited-node multicast address
245 */
246
247static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
248 struct in6_addr *solicited)
249{
250 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900251 htonl(0xFF020000), 0,
252 htonl(0x1),
253 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254}
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
257{
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900258 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259}
260
261static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
262{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000263 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900264 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000265 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266}
267
268static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
269{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000270 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900271 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000272 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273}
274
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100275static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
276{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000277 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100278}
279
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300280#ifdef CONFIG_PROC_FS
281extern int if6_proc_init(void);
282extern void if6_proc_exit(void);
283#endif
284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285#endif