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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 | ||
20 | struct prefix_info { | |
21 | __u8 type; | |
22 | __u8 length; | |
23 | __u8 prefix_len; | |
24 | ||
25 | #if defined(__BIG_ENDIAN_BITFIELD) | |
26 | __u8 onlink : 1, | |
27 | autoconf : 1, | |
28 | reserved : 6; | |
29 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
30 | __u8 reserved : 6, | |
31 | autoconf : 1, | |
32 | onlink : 1; | |
33 | #else | |
34 | #error "Please fix <asm/byteorder.h>" | |
35 | #endif | |
36 | __u32 valid; | |
37 | __u32 prefered; | |
38 | __u32 reserved2; | |
39 | ||
40 | struct in6_addr prefix; | |
41 | }; | |
42 | ||
43 | ||
44 | #ifdef __KERNEL__ | |
45 | ||
46 | #include <linux/in6.h> | |
47 | #include <linux/netdevice.h> | |
48 | #include <net/if_inet6.h> | |
49 | ||
50 | #define IN6_ADDR_HSIZE 16 | |
51 | ||
52 | extern int addrconf_init(void); | |
53 | extern void addrconf_cleanup(void); | |
54 | ||
55 | extern int addrconf_add_ifaddr(void __user *arg); | |
56 | extern int addrconf_del_ifaddr(void __user *arg); | |
57 | extern int addrconf_set_dstaddr(void __user *arg); | |
58 | ||
59 | extern int ipv6_chk_addr(struct in6_addr *addr, | |
60 | struct net_device *dev, | |
61 | int strict); | |
62 | extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, | |
63 | struct net_device *dev, | |
64 | int strict); | |
65 | extern int ipv6_get_saddr(struct dst_entry *dst, | |
66 | struct in6_addr *daddr, | |
67 | struct in6_addr *saddr); | |
68 | extern int ipv6_dev_get_saddr(struct net_device *dev, | |
69 | struct in6_addr *daddr, | |
70 | struct in6_addr *saddr); | |
71 | extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *); | |
72 | extern int ipv6_rcv_saddr_equal(const struct sock *sk, | |
73 | const struct sock *sk2); | |
74 | extern void addrconf_join_solict(struct net_device *dev, | |
75 | struct in6_addr *addr); | |
76 | extern void addrconf_leave_solict(struct inet6_dev *idev, | |
77 | struct in6_addr *addr); | |
78 | ||
79 | /* | |
80 | * multicast prototypes (mcast.c) | |
81 | */ | |
82 | extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, | |
83 | struct in6_addr *addr); | |
84 | extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
85 | struct in6_addr *addr); | |
86 | extern void ipv6_sock_mc_close(struct sock *sk); | |
87 | extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, | |
88 | struct in6_addr *src_addr); | |
89 | ||
90 | extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); | |
91 | extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); | |
92 | extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); | |
93 | extern void ipv6_mc_up(struct inet6_dev *idev); | |
94 | extern void ipv6_mc_down(struct inet6_dev *idev); | |
95 | extern void ipv6_mc_init_dev(struct inet6_dev *idev); | |
96 | extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
97 | extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); | |
98 | ||
99 | extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, | |
100 | struct in6_addr *src_addr); | |
101 | extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); | |
102 | ||
103 | extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); | |
104 | ||
105 | extern int ipv6_get_hoplimit(struct net_device *dev); | |
106 | ||
107 | /* | |
108 | * anycast prototypes (anycast.c) | |
109 | */ | |
110 | extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); | |
111 | extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); | |
112 | extern void ipv6_sock_ac_close(struct sock *sk); | |
113 | extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); | |
114 | ||
115 | extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); | |
116 | extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); | |
117 | extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); | |
118 | ||
119 | ||
120 | /* Device notifier */ | |
121 | extern int register_inet6addr_notifier(struct notifier_block *nb); | |
122 | extern int unregister_inet6addr_notifier(struct notifier_block *nb); | |
123 | ||
124 | static inline struct inet6_dev * | |
125 | __in6_dev_get(struct net_device *dev) | |
126 | { | |
127 | return (struct inet6_dev *)dev->ip6_ptr; | |
128 | } | |
129 | ||
130 | extern rwlock_t addrconf_lock; | |
131 | ||
132 | static inline struct inet6_dev * | |
133 | in6_dev_get(struct net_device *dev) | |
134 | { | |
135 | struct inet6_dev *idev = NULL; | |
136 | read_lock(&addrconf_lock); | |
137 | idev = dev->ip6_ptr; | |
138 | if (idev) | |
139 | atomic_inc(&idev->refcnt); | |
140 | read_unlock(&addrconf_lock); | |
141 | return idev; | |
142 | } | |
143 | ||
144 | extern void in6_dev_finish_destroy(struct inet6_dev *idev); | |
145 | ||
146 | static inline void | |
147 | in6_dev_put(struct inet6_dev *idev) | |
148 | { | |
149 | if (atomic_dec_and_test(&idev->refcnt)) | |
150 | in6_dev_finish_destroy(idev); | |
151 | } | |
152 | ||
153 | #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
154 | #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
155 | ||
156 | ||
157 | extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); | |
158 | ||
159 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
160 | { | |
161 | if (atomic_dec_and_test(&ifp->refcnt)) | |
162 | inet6_ifa_finish_destroy(ifp); | |
163 | } | |
164 | ||
165 | #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) | |
166 | #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) | |
167 | ||
168 | ||
169 | extern void addrconf_forwarding_on(void); | |
170 | /* | |
171 | * Hash function taken from net_alias.c | |
172 | */ | |
173 | ||
174 | static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) | |
175 | { | |
176 | __u32 word; | |
177 | ||
178 | /* | |
179 | * We perform the hash function over the last 64 bits of the address | |
180 | * This will include the IEEE address token on links that support it. | |
181 | */ | |
182 | ||
183 | word = addr->s6_addr32[2] ^ addr->s6_addr32[3]; | |
184 | word ^= (word >> 16); | |
185 | word ^= (word >> 8); | |
186 | ||
187 | return ((word ^ (word >> 4)) & 0x0f); | |
188 | } | |
189 | ||
190 | /* | |
191 | * compute link-local solicited-node multicast address | |
192 | */ | |
193 | ||
194 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
195 | struct in6_addr *solicited) | |
196 | { | |
197 | ipv6_addr_set(solicited, | |
198 | __constant_htonl(0xFF020000), 0, | |
199 | __constant_htonl(0x1), | |
200 | __constant_htonl(0xFF000000) | addr->s6_addr32[3]); | |
201 | } | |
202 | ||
203 | ||
204 | static inline void ipv6_addr_all_nodes(struct in6_addr *addr) | |
205 | { | |
206 | ipv6_addr_set(addr, | |
207 | __constant_htonl(0xFF020000), 0, 0, | |
208 | __constant_htonl(0x1)); | |
209 | } | |
210 | ||
211 | static inline void ipv6_addr_all_routers(struct in6_addr *addr) | |
212 | { | |
213 | ipv6_addr_set(addr, | |
214 | __constant_htonl(0xFF020000), 0, 0, | |
215 | __constant_htonl(0x2)); | |
216 | } | |
217 | ||
218 | static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) | |
219 | { | |
220 | return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); | |
221 | } | |
222 | ||
223 | static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) | |
224 | { | |
225 | return (addr->s6_addr32[0] == htonl(0xff020000) && | |
226 | addr->s6_addr32[1] == 0 && | |
227 | addr->s6_addr32[2] == 0 && | |
228 | addr->s6_addr32[3] == htonl(0x00000001)); | |
229 | } | |
230 | ||
231 | static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) | |
232 | { | |
233 | return (addr->s6_addr32[0] == htonl(0xff020000) && | |
234 | addr->s6_addr32[1] == 0 && | |
235 | addr->s6_addr32[2] == 0 && | |
236 | addr->s6_addr32[3] == htonl(0x00000002)); | |
237 | } | |
238 | ||
239 | #endif | |
240 | #endif |