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
20 #include <linux/in.h>
21 #include <linux/in6.h>
22
23 struct 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
39 __be32 valid;
40 __be32 prefered;
41 __be32 reserved2;
42
43 struct in6_addr prefix;
44 };
45
46
47 #ifdef __KERNEL__
48
49 #include <linux/netdevice.h>
50 #include <net/if_inet6.h>
51 #include <net/ipv6.h>
52
53 #define IN6_ADDR_HSIZE 16
54
55 extern int addrconf_init(void);
56 extern void addrconf_cleanup(void);
57
58 extern int addrconf_add_ifaddr(void __user *arg);
59 extern int addrconf_del_ifaddr(void __user *arg);
60 extern int addrconf_set_dstaddr(void __user *arg);
61
62 extern int ipv6_chk_addr(struct net *net,
63 struct in6_addr *addr,
64 struct net_device *dev,
65 int strict);
66
67 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
68 extern int ipv6_chk_home_addr(struct net *net,
69 struct in6_addr *addr);
70 #endif
71 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
72 struct in6_addr *addr,
73 struct net_device *dev,
74 int strict);
75
76 extern int ipv6_get_saddr(struct dst_entry *dst,
77 struct in6_addr *daddr,
78 struct in6_addr *saddr);
79 extern int ipv6_dev_get_saddr(struct net_device *dev,
80 struct in6_addr *daddr,
81 struct in6_addr *saddr);
82 extern int ipv6_get_lladdr(struct net_device *dev,
83 struct in6_addr *addr,
84 unsigned char banned_flags);
85 extern int ipv6_rcv_saddr_equal(const struct sock *sk,
86 const struct sock *sk2);
87 extern void addrconf_join_solict(struct net_device *dev,
88 struct in6_addr *addr);
89 extern void addrconf_leave_solict(struct inet6_dev *idev,
90 struct in6_addr *addr);
91
92 /*
93 * IPv6 Address Label subsystem (addrlabel.c)
94 */
95 extern int ipv6_addr_label_init(void);
96 extern void ipv6_addr_label_rtnl_register(void);
97 extern u32 ipv6_addr_label(const struct in6_addr *addr,
98 int type, int ifindex);
99
100 /*
101 * multicast prototypes (mcast.c)
102 */
103 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
104 struct in6_addr *addr);
105 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
106 struct in6_addr *addr);
107 extern void ipv6_sock_mc_close(struct sock *sk);
108 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
109 struct in6_addr *src_addr);
110
111 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
112 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
113 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
114 extern void ipv6_mc_up(struct inet6_dev *idev);
115 extern void ipv6_mc_down(struct inet6_dev *idev);
116 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
117 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
118 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
119
120 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
121 struct in6_addr *src_addr);
122 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
123
124 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
125
126 extern int ipv6_get_hoplimit(struct net_device *dev);
127
128 /*
129 * anycast prototypes (anycast.c)
130 */
131 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
132 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
133 extern void ipv6_sock_ac_close(struct sock *sk);
134 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
135
136 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
137 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
138 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
139
140
141 /* Device notifier */
142 extern int register_inet6addr_notifier(struct notifier_block *nb);
143 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
144
145 static inline struct inet6_dev *
146 __in6_dev_get(struct net_device *dev)
147 {
148 return rcu_dereference(dev->ip6_ptr);
149 }
150
151 static inline struct inet6_dev *
152 in6_dev_get(struct net_device *dev)
153 {
154 struct inet6_dev *idev = NULL;
155 rcu_read_lock();
156 idev = __in6_dev_get(dev);
157 if (idev)
158 atomic_inc(&idev->refcnt);
159 rcu_read_unlock();
160 return idev;
161 }
162
163 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
164
165 static inline void
166 in6_dev_put(struct inet6_dev *idev)
167 {
168 if (atomic_dec_and_test(&idev->refcnt))
169 in6_dev_finish_destroy(idev);
170 }
171
172 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
173 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
174
175
176 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
177
178 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
179 {
180 if (atomic_dec_and_test(&ifp->refcnt))
181 inet6_ifa_finish_destroy(ifp);
182 }
183
184 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
185 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
186
187
188 extern void addrconf_forwarding_on(void);
189 /*
190 * Hash function taken from net_alias.c
191 */
192
193 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
194 {
195 __u32 word;
196
197 /*
198 * We perform the hash function over the last 64 bits of the address
199 * This will include the IEEE address token on links that support it.
200 */
201
202 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
203 word ^= (word >> 16);
204 word ^= (word >> 8);
205
206 return ((word ^ (word >> 4)) & 0x0f);
207 }
208
209 /*
210 * compute link-local solicited-node multicast address
211 */
212
213 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
214 struct in6_addr *solicited)
215 {
216 ipv6_addr_set(solicited,
217 __constant_htonl(0xFF020000), 0,
218 __constant_htonl(0x1),
219 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
220 }
221
222
223 static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
224 {
225 ipv6_addr_set(addr,
226 __constant_htonl(0xFF020000), 0, 0,
227 __constant_htonl(0x1));
228 }
229
230 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
231 {
232 ipv6_addr_set(addr,
233 __constant_htonl(0xFF020000), 0, 0,
234 __constant_htonl(0x2));
235 }
236
237 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
238 {
239 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
240 }
241
242 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
243 {
244 return (addr->s6_addr32[0] == htonl(0xff020000) &&
245 addr->s6_addr32[1] == 0 &&
246 addr->s6_addr32[2] == 0 &&
247 addr->s6_addr32[3] == htonl(0x00000001));
248 }
249
250 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
251 {
252 return (addr->s6_addr32[0] == htonl(0xff020000) &&
253 addr->s6_addr32[1] == 0 &&
254 addr->s6_addr32[2] == 0 &&
255 addr->s6_addr32[3] == htonl(0x00000002));
256 }
257
258 static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
259 {
260 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
261 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
262 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
263 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
264 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
265 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
266 eui[1] = 0;
267 eui[2] = 0x5E;
268 eui[3] = 0xFE;
269 memcpy (eui+4, &addr, 4);
270 return 0;
271 }
272
273 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
274 {
275 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
276 }
277
278 #ifdef CONFIG_PROC_FS
279 extern int if6_proc_init(void);
280 extern void if6_proc_exit(void);
281 #endif
282
283 #endif
284 #endif
285
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