1 #ifndef _ADDRCONF_H
2 #define _ADDRCONF_H
3
4 #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)
11 #define REGEN_MAX_RETRY (5)
12 #define MAX_DESYNC_FACTOR (600)
13
14 #define ADDR_CHECK_FREQUENCY (120*HZ)
15
16 #define IPV6_MAX_ADDRESSES 16
17
18 #include <linux/in.h>
19 #include <linux/in6.h>
20
21 struct 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
37 __be32 valid;
38 __be32 prefered;
39 __be32 reserved2;
40
41 struct in6_addr prefix;
42 };
43
44
45 #ifdef __KERNEL__
46
47 #include <linux/netdevice.h>
48 #include <net/if_inet6.h>
49 #include <net/ipv6.h>
50
51 #define IN6_ADDR_HSIZE 16
52
53 extern int addrconf_init(void);
54 extern void addrconf_cleanup(void);
55
56 extern int addrconf_add_ifaddr(struct net *net,
57 void __user *arg);
58 extern int addrconf_del_ifaddr(struct net *net,
59 void __user *arg);
60 extern int addrconf_set_dstaddr(struct net *net,
61 void __user *arg);
62
63 extern int ipv6_chk_addr(struct net *net,
64 struct in6_addr *addr,
65 struct net_device *dev,
66 int strict);
67
68 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
69 extern int ipv6_chk_home_addr(struct net *net,
70 struct in6_addr *addr);
71 #endif
72
73 extern int ipv6_chk_prefix(struct in6_addr *addr,
74 struct net_device *dev);
75
76 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
77 const struct in6_addr *addr,
78 struct net_device *dev,
79 int strict);
80
81 extern int ipv6_dev_get_saddr(struct net *net,
82 struct net_device *dev,
83 const struct in6_addr *daddr,
84 unsigned int srcprefs,
85 struct in6_addr *saddr);
86 extern int ipv6_get_lladdr(struct net_device *dev,
87 struct in6_addr *addr,
88 unsigned char banned_flags);
89 extern int ipv6_rcv_saddr_equal(const struct sock *sk,
90 const struct sock *sk2);
91 extern void addrconf_join_solict(struct net_device *dev,
92 struct in6_addr *addr);
93 extern void addrconf_leave_solict(struct inet6_dev *idev,
94 struct in6_addr *addr);
95
addrconf_timeout_fixup(u32 timeout,unsigned unit)96 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
97 unsigned unit)
98 {
99 if (timeout == 0xffffffff)
100 return ~0UL;
101
102 /*
103 * Avoid arithmetic overflow.
104 * Assuming unit is constant and non-zero, this "if" statement
105 * will go away on 64bit archs.
106 */
107 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
108 return LONG_MAX / unit;
109
110 return timeout;
111 }
112
addrconf_finite_timeout(unsigned long timeout)113 static inline int addrconf_finite_timeout(unsigned long timeout)
114 {
115 return ~timeout;
116 }
117
118 /*
119 * IPv6 Address Label subsystem (addrlabel.c)
120 */
121 extern int ipv6_addr_label_init(void);
122 extern void ipv6_addr_label_cleanup(void);
123 extern void ipv6_addr_label_rtnl_register(void);
124 extern u32 ipv6_addr_label(struct net *net,
125 const struct in6_addr *addr,
126 int type, int ifindex);
127
128 /*
129 * multicast prototypes (mcast.c)
130 */
131 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
132 const struct in6_addr *addr);
133 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
134 const struct in6_addr *addr);
135 extern void ipv6_sock_mc_close(struct sock *sk);
136 extern int inet6_mc_check(struct sock *sk,
137 const struct in6_addr *mc_addr,
138 const struct in6_addr *src_addr);
139
140 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
141 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
142 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
143 extern void ipv6_mc_up(struct inet6_dev *idev);
144 extern void ipv6_mc_down(struct inet6_dev *idev);
145 extern void ipv6_mc_unmap(struct inet6_dev *idev);
146 extern void ipv6_mc_remap(struct inet6_dev *idev);
147 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
148 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
149 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
150
151 extern int ipv6_chk_mcast_addr(struct net_device *dev,
152 const struct in6_addr *group,
153 const struct in6_addr *src_addr);
154 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
155
156 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
157
158 /*
159 * anycast prototypes (anycast.c)
160 */
161 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
162 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
163 extern void ipv6_sock_ac_close(struct sock *sk);
164 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
165
166 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
167 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
168 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
169 struct in6_addr *addr);
170
171
172 /* Device notifier */
173 extern int register_inet6addr_notifier(struct notifier_block *nb);
174 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
175
176 /**
177 * __in6_dev_get - get inet6_dev pointer from netdevice
178 * @dev: network device
179 *
180 * Caller must hold rcu_read_lock or RTNL, because this function
181 * does not take a reference on the inet6_dev.
182 */
__in6_dev_get(const struct net_device * dev)183 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
184 {
185 return rcu_dereference_rtnl(dev->ip6_ptr);
186 }
187
188 /**
189 * in6_dev_get - get inet6_dev pointer from netdevice
190 * @dev: network device
191 *
192 * This version can be used in any context, and takes a reference
193 * on the inet6_dev. Callers must use in6_dev_put() later to
194 * release this reference.
195 */
in6_dev_get(const struct net_device * dev)196 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
197 {
198 struct inet6_dev *idev;
199
200 rcu_read_lock();
201 idev = rcu_dereference(dev->ip6_ptr);
202 if (idev)
203 atomic_inc(&idev->refcnt);
204 rcu_read_unlock();
205 return idev;
206 }
207
208 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
209
in6_dev_put(struct inet6_dev * idev)210 static inline void in6_dev_put(struct inet6_dev *idev)
211 {
212 if (atomic_dec_and_test(&idev->refcnt))
213 in6_dev_finish_destroy(idev);
214 }
215
__in6_dev_put(struct inet6_dev * idev)216 static inline void __in6_dev_put(struct inet6_dev *idev)
217 {
218 atomic_dec(&idev->refcnt);
219 }
220
in6_dev_hold(struct inet6_dev * idev)221 static inline void in6_dev_hold(struct inet6_dev *idev)
222 {
223 atomic_inc(&idev->refcnt);
224 }
225
226 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
227
in6_ifa_put(struct inet6_ifaddr * ifp)228 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
229 {
230 if (atomic_dec_and_test(&ifp->refcnt))
231 inet6_ifa_finish_destroy(ifp);
232 }
233
__in6_ifa_put(struct inet6_ifaddr * ifp)234 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
235 {
236 atomic_dec(&ifp->refcnt);
237 }
238
in6_ifa_hold(struct inet6_ifaddr * ifp)239 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
240 {
241 atomic_inc(&ifp->refcnt);
242 }
243
244
245 /*
246 * compute link-local solicited-node multicast address
247 */
248
addrconf_addr_solict_mult(const struct in6_addr * addr,struct in6_addr * solicited)249 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
250 struct in6_addr *solicited)
251 {
252 ipv6_addr_set(solicited,
253 htonl(0xFF020000), 0,
254 htonl(0x1),
255 htonl(0xFF000000) | addr->s6_addr32[3]);
256 }
257
ipv6_addr_is_multicast(const struct in6_addr * addr)258 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
259 {
260 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
261 }
262
ipv6_addr_is_ll_all_nodes(const struct in6_addr * addr)263 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
264 {
265 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
266 addr->s6_addr32[1] | addr->s6_addr32[2] |
267 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
268 }
269
ipv6_addr_is_ll_all_routers(const struct in6_addr * addr)270 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
271 {
272 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
273 addr->s6_addr32[1] | addr->s6_addr32[2] |
274 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
275 }
276
ipv6_addr_is_isatap(const struct in6_addr * addr)277 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
278 {
279 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
280 }
281
282 #ifdef CONFIG_PROC_FS
283 extern int if6_proc_init(void);
284 extern void if6_proc_exit(void);
285 #endif
286
287 #endif
288 #endif
289