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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
Eric Dumazetddbe5032012-07-18 08:11:12 +000049#define IN6_ADDR_HSIZE_SHIFT 4
50#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52extern int addrconf_init(void);
53extern void addrconf_cleanup(void);
54
Daniel Lezcanoaf284932008-03-05 10:46:57 -080055extern int addrconf_add_ifaddr(struct net *net,
56 void __user *arg);
57extern int addrconf_del_ifaddr(struct net *net,
58 void __user *arg);
59extern int addrconf_set_dstaddr(struct net *net,
60 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Daniel Lezcanobfeade02008-01-10 22:43:18 -080062extern int ipv6_chk_addr(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000063 const struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 struct net_device *dev,
65 int strict);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080066
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -070067#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Daniel Lezcano389f6612008-01-10 22:44:40 -080068extern int ipv6_chk_home_addr(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000069 const struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070070#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040071
Eric Dumazetb71d1d42011-04-22 04:53:02 +000072extern int ipv6_chk_prefix(const struct in6_addr *addr,
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040073 struct net_device *dev);
74
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080075extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090076 const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080077 struct net_device *dev,
78 int strict);
79
Brian Haley191cd582008-08-14 15:33:21 -070080extern int ipv6_dev_get_saddr(struct net *net,
Patrick McHardyb3f644f2012-08-26 19:14:14 +020081 const struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090082 const struct in6_addr *daddr,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090083 unsigned int srcprefs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 struct in6_addr *saddr);
Neil Horman95c385b2007-04-25 17:08:10 -070085extern int ipv6_get_lladdr(struct net_device *dev,
86 struct in6_addr *addr,
87 unsigned char banned_flags);
Vlad Yasevichb2f5e7c2009-03-24 16:24:51 +000088extern int ipv6_rcv_saddr_equal(const struct sock *sk,
89 const struct sock *sk2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090extern void addrconf_join_solict(struct net_device *dev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000091 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092extern void addrconf_leave_solict(struct inet6_dev *idev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000093 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090095static inline unsigned long addrconf_timeout_fixup(u32 timeout,
Eric Dumazet95c96172012-04-15 05:58:06 +000096 unsigned int unit)
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090097{
98 if (timeout == 0xffffffff)
99 return ~0UL;
100
101 /*
102 * Avoid arithmetic overflow.
103 * Assuming unit is constant and non-zero, this "if" statement
104 * will go away on 64bit archs.
105 */
106 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
107 return LONG_MAX / unit;
108
109 return timeout;
110}
111
112static inline int addrconf_finite_timeout(unsigned long timeout)
113{
114 return ~timeout;
115}
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900118 * IPv6 Address Label subsystem (addrlabel.c)
119 */
120extern int ipv6_addr_label_init(void);
Neil Horman2cc6d2b2010-09-24 09:55:52 +0000121extern void ipv6_addr_label_cleanup(void);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900122extern void ipv6_addr_label_rtnl_register(void);
Benjamin Thery3de23252008-05-28 14:51:24 +0200123extern u32 ipv6_addr_label(struct net *net,
124 const struct in6_addr *addr,
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900125 int type, int ifindex);
126
127/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 * multicast prototypes (mcast.c)
129 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900130extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
131 const struct in6_addr *addr);
132extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
133 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134extern void ipv6_sock_mc_close(struct sock *sk);
Eric Dumazeta50feda2012-05-18 18:57:34 +0000135extern bool inet6_mc_check(struct sock *sk,
136 const struct in6_addr *mc_addr,
137 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900139extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
140extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
141extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142extern void ipv6_mc_up(struct inet6_dev *idev);
143extern void ipv6_mc_down(struct inet6_dev *idev);
Moni Shoua75c78502009-09-15 02:37:40 -0700144extern void ipv6_mc_unmap(struct inet6_dev *idev);
145extern void ipv6_mc_remap(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146extern void ipv6_mc_init_dev(struct inet6_dev *idev);
147extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
148extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
149
Eric Dumazeta50feda2012-05-18 18:57:34 +0000150extern bool ipv6_chk_mcast_addr(struct net_device *dev,
151 const struct in6_addr *group,
152 const struct in6_addr *src_addr);
153extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Neil Hormane6bff992012-01-04 10:49:15 +0000155extern void addrconf_prefix_rcv(struct net_device *dev,
156 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158/*
159 * anycast prototypes (anycast.c)
160 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000161extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
162extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163extern void ipv6_sock_ac_close(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000165extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
166extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
Eric Dumazeta50feda2012-05-18 18:57:34 +0000167extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
168 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170
171/* Device notifier */
172extern int register_inet6addr_notifier(struct notifier_block *nb);
173extern int unregister_inet6addr_notifier(struct notifier_block *nb);
174
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000175extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
176 struct ipv6_devconf *devconf);
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