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[NETNS][IPV6]: inet6_addr - ipv6_chk_same_addr namespace aware
[net-next-2.6.git] / include / net / addrconf.h
CommitLineData
1da177e4
LT		 1#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
c7dc89c0 20#include <linux/in.h>
6a800d45
PM		 21#include <linux/in6.h>
22
1da177e4
LT		 23struct 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
e69a4adc
AV		 39 __be32 valid;
40 __be32 prefered;
41 __be32 reserved2;
1da177e4
LT		 42
43 struct in6_addr prefix;
44};
45
46
47#ifdef __KERNEL__
48
1da177e4
LT		 49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
e4553edd 51#include <net/ipv6.h>
1da177e4
LT		 52
53#define IN6_ADDR_HSIZE 16
54
55extern int addrconf_init(void);
56extern void addrconf_cleanup(void);
57
58extern int addrconf_add_ifaddr(void __user *arg);
59extern int addrconf_del_ifaddr(void __user *arg);
60extern int addrconf_set_dstaddr(void __user *arg);
61
bfeade08
DL		 62extern int ipv6_chk_addr(struct net *net,
63 struct in6_addr *addr,
1da177e4
LT		 64 struct net_device *dev,
65 int strict);
bfeade08 66
59fbb3a6 67#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 68extern int ipv6_chk_home_addr(struct in6_addr *addr);
65d4ed92 69#endif
1da177e4
LT		 70extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
71 struct net_device *dev,
72 int strict);
73extern int ipv6_get_saddr(struct dst_entry *dst,
74 struct in6_addr *daddr,
75 struct in6_addr *saddr);
76extern int ipv6_dev_get_saddr(struct net_device *dev,
77 struct in6_addr *daddr,
78 struct in6_addr *saddr);
95c385b4
NH		 79extern int ipv6_get_lladdr(struct net_device *dev,
80 struct in6_addr *addr,
81 unsigned char banned_flags);
1da177e4
LT		 82extern int ipv6_rcv_saddr_equal(const struct sock *sk,
83 const struct sock *sk2);
84extern void addrconf_join_solict(struct net_device *dev,
85 struct in6_addr *addr);
86extern void addrconf_leave_solict(struct inet6_dev *idev,
87 struct in6_addr *addr);
88
2a8cc6c8
YH		 89/*
90 * IPv6 Address Label subsystem (addrlabel.c)
91 */
92extern int ipv6_addr_label_init(void);
93extern void ipv6_addr_label_rtnl_register(void);
94extern u32 ipv6_addr_label(const struct in6_addr *addr,
95 int type, int ifindex);
96
1da177e4
LT		 97/*
98 * multicast prototypes (mcast.c)
99 */
100extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
101 struct in6_addr *addr);
102extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
103 struct in6_addr *addr);
104extern void ipv6_sock_mc_close(struct sock *sk);
105extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
106 struct in6_addr *src_addr);
107
108extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
109extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
110extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
111extern void ipv6_mc_up(struct inet6_dev *idev);
112extern void ipv6_mc_down(struct inet6_dev *idev);
113extern void ipv6_mc_init_dev(struct inet6_dev *idev);
114extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
115extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
116
117extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
118 struct in6_addr *src_addr);
119extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
120
121extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
122
123extern int ipv6_get_hoplimit(struct net_device *dev);
124
125/*
126 * anycast prototypes (anycast.c)
127 */
128extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
129extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
130extern void ipv6_sock_ac_close(struct sock *sk);
131extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
132
133extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
134extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
135extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
136
137
138/* Device notifier */
139extern int register_inet6addr_notifier(struct notifier_block *nb);
140extern int unregister_inet6addr_notifier(struct notifier_block *nb);
141
142static inline struct inet6_dev *
143__in6_dev_get(struct net_device *dev)
144{
8814c4b5 145 return rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 146}
147
1da177e4
LT		 148static inline struct inet6_dev *
149in6_dev_get(struct net_device *dev)
150{
151 struct inet6_dev *idev = NULL;
8814c4b5
YH		 152 rcu_read_lock();
153 idev = __in6_dev_get(dev);
1da177e4
LT		 154 if (idev)
155 atomic_inc(&idev->refcnt);
8814c4b5 156 rcu_read_unlock();
1da177e4
LT		 157 return idev;
158}
159
160extern void in6_dev_finish_destroy(struct inet6_dev *idev);
161
162static inline void
163in6_dev_put(struct inet6_dev *idev)
164{
165 if (atomic_dec_and_test(&idev->refcnt))
166 in6_dev_finish_destroy(idev);
167}
168
169#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
170#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
171
172
173extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
174
175static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
176{
177 if (atomic_dec_and_test(&ifp->refcnt))
178 inet6_ifa_finish_destroy(ifp);
179}
180
181#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
182#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
183
184
185extern void addrconf_forwarding_on(void);
186/*
187 * Hash function taken from net_alias.c
188 */
189
190static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
191{
192 __u32 word;
193
194 /*
195 * We perform the hash function over the last 64 bits of the address
196 * This will include the IEEE address token on links that support it.
197 */
198
e69a4adc 199 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
1da177e4
LT		 200 word ^= (word >> 16);
201 word ^= (word >> 8);
202
203 return ((word ^ (word >> 4)) & 0x0f);
204}
205
206/*
207 * compute link-local solicited-node multicast address
208 */
209
210static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
211 struct in6_addr *solicited)
212{
213 ipv6_addr_set(solicited,
214 __constant_htonl(0xFF020000), 0,
215 __constant_htonl(0x1),
216 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
217}
218
219
220static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
221{
222 ipv6_addr_set(addr,
223 __constant_htonl(0xFF020000), 0, 0,
224 __constant_htonl(0x1));
225}
226
227static inline void ipv6_addr_all_routers(struct in6_addr *addr)
228{
229 ipv6_addr_set(addr,
230 __constant_htonl(0xFF020000), 0, 0,
231 __constant_htonl(0x2));
232}
233
234static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
235{
236 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
237}
238
239static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
240{
241 return (addr->s6_addr32[0] == htonl(0xff020000) &&
242 addr->s6_addr32[1] == 0 &&
243 addr->s6_addr32[2] == 0 &&
244 addr->s6_addr32[3] == htonl(0x00000001));
245}
246
247static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
248{
249 return (addr->s6_addr32[0] == htonl(0xff020000) &&
250 addr->s6_addr32[1] == 0 &&
251 addr->s6_addr32[2] == 0 &&
252 addr->s6_addr32[3] == htonl(0x00000002));
253}
254
c7dc89c0
FT		 255static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
256{
3db8cda3
JP		 257 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
258 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
259 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
260 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
261 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
262 ipv4_is_badclass(addr)) ? 0x00 : 0x02;
c7dc89c0
FT		 263 eui[1] = 0;
264 eui[2] = 0x5E;
265 eui[3] = 0xFE;
266 memcpy (eui+4, &addr, 4);
267 return 0;
268}
269
270static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
271{
272 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
273}
274
20380731
ACM		 275#ifdef CONFIG_PROC_FS
276extern int if6_proc_init(void);
277extern void if6_proc_exit(void);
278#endif
279
1da177e4
LT		 280#endif
281#endif
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