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 (3)
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 #include <linux/netdevice.h>
46 #include <net/if_inet6.h>
47 #include <net/ipv6.h>
48
49 #define IN6_ADDR_HSIZE 16
50
51 extern int addrconf_init(void);
52 extern void addrconf_cleanup(void);
53
54 extern int addrconf_add_ifaddr(struct net *net,
55 void __user *arg);
56 extern int addrconf_del_ifaddr(struct net *net,
57 void __user *arg);
58 extern int addrconf_set_dstaddr(struct net *net,
59 void __user *arg);
60
61 extern int ipv6_chk_addr(struct net *net,
62 const struct in6_addr *addr,
63 struct net_device *dev,
64 int strict);
65
66 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
67 extern int ipv6_chk_home_addr(struct net *net,
68 const struct in6_addr *addr);
69 #endif
70
71 extern int ipv6_chk_prefix(const struct in6_addr *addr,
72 struct net_device *dev);
73
74 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
75 const struct in6_addr *addr,
76 struct net_device *dev,
77 int strict);
78
79 extern int ipv6_dev_get_saddr(struct net *net,
80 struct net_device *dev,
81 const struct in6_addr *daddr,
82 unsigned int srcprefs,
83 struct in6_addr *saddr);
84 extern int __ipv6_get_lladdr(struct inet6_dev *idev,
85 struct in6_addr *addr,
86 unsigned char banned_flags);
87 extern int ipv6_get_lladdr(struct net_device *dev,
88 struct in6_addr *addr,
89 unsigned char banned_flags);
90 extern int ipv6_rcv_saddr_equal(const struct sock *sk,
91 const struct sock *sk2);
92 extern void addrconf_join_solict(struct net_device *dev,
93 const struct in6_addr *addr);
94 extern void addrconf_leave_solict(struct inet6_dev *idev,
95 const struct in6_addr *addr);
96
addrconf_timeout_fixup(u32 timeout,unsigned unit)97 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
98 unsigned unit)
99 {
100 if (timeout == 0xffffffff)
101 return ~0UL;
102
103 /*
104 * Avoid arithmetic overflow.
105 * Assuming unit is constant and non-zero, this "if" statement
106 * will go away on 64bit archs.
107 */
108 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
109 return LONG_MAX / unit;
110
111 return timeout;
112 }
113
addrconf_finite_timeout(unsigned long timeout)114 static inline int addrconf_finite_timeout(unsigned long timeout)
115 {
116 return ~timeout;
117 }
118
119 /*
120 * IPv6 Address Label subsystem (addrlabel.c)
121 */
122 extern int ipv6_addr_label_init(void);
123 extern void ipv6_addr_label_cleanup(void);
124 extern void ipv6_addr_label_rtnl_register(void);
125 extern u32 ipv6_addr_label(struct net *net,
126 const struct in6_addr *addr,
127 int type, int ifindex);
128
129 /*
130 * multicast prototypes (mcast.c)
131 */
132 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
133 const struct in6_addr *addr);
134 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
135 const struct in6_addr *addr);
136 extern void ipv6_sock_mc_close(struct sock *sk);
137 extern int inet6_mc_check(struct sock *sk,
138 const struct in6_addr *mc_addr,
139 const struct in6_addr *src_addr);
140
141 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
142 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
143 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
144 extern void ipv6_mc_up(struct inet6_dev *idev);
145 extern void ipv6_mc_down(struct inet6_dev *idev);
146 extern void ipv6_mc_unmap(struct inet6_dev *idev);
147 extern void ipv6_mc_remap(struct inet6_dev *idev);
148 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
149 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
150 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
151
152 extern int ipv6_chk_mcast_addr(struct net_device *dev,
153 const struct in6_addr *group,
154 const struct in6_addr *src_addr);
155 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
156
157 extern void addrconf_prefix_rcv(struct net_device *dev,
158 u8 *opt, int len, bool sllao);
159
160 /*
161 * anycast prototypes (anycast.c)
162 */
163 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
164 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
165 extern void ipv6_sock_ac_close(struct sock *sk);
166
167 extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
168 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
169 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
170 const struct in6_addr *addr);
171
172
173 /* Device notifier */
174 extern int register_inet6addr_notifier(struct notifier_block *nb);
175 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
176
177 /**
178 * __in6_dev_get - get inet6_dev pointer from netdevice
179 * @dev: network device
180 *
181 * Caller must hold rcu_read_lock or RTNL, because this function
182 * does not take a reference on the inet6_dev.
183 */
__in6_dev_get(const struct net_device * dev)184 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
185 {
186 return rcu_dereference_rtnl(dev->ip6_ptr);
187 }
188
189 /**
190 * in6_dev_get - get inet6_dev pointer from netdevice
191 * @dev: network device
192 *
193 * This version can be used in any context, and takes a reference
194 * on the inet6_dev. Callers must use in6_dev_put() later to
195 * release this reference.
196 */
in6_dev_get(const struct net_device * dev)197 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
198 {
199 struct inet6_dev *idev;
200
201 rcu_read_lock();
202 idev = rcu_dereference(dev->ip6_ptr);
203 if (idev)
204 atomic_inc(&idev->refcnt);
205 rcu_read_unlock();
206 return idev;
207 }
208
209 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
210
in6_dev_put(struct inet6_dev * idev)211 static inline void in6_dev_put(struct inet6_dev *idev)
212 {
213 if (atomic_dec_and_test(&idev->refcnt))
214 in6_dev_finish_destroy(idev);
215 }
216
__in6_dev_put(struct inet6_dev * idev)217 static inline void __in6_dev_put(struct inet6_dev *idev)
218 {
219 atomic_dec(&idev->refcnt);
220 }
221
in6_dev_hold(struct inet6_dev * idev)222 static inline void in6_dev_hold(struct inet6_dev *idev)
223 {
224 atomic_inc(&idev->refcnt);
225 }
226
227 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
228
in6_ifa_put(struct inet6_ifaddr * ifp)229 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
230 {
231 if (atomic_dec_and_test(&ifp->refcnt))
232 inet6_ifa_finish_destroy(ifp);
233 }
234
__in6_ifa_put(struct inet6_ifaddr * ifp)235 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
236 {
237 atomic_dec(&ifp->refcnt);
238 }
239
in6_ifa_hold(struct inet6_ifaddr * ifp)240 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
241 {
242 atomic_inc(&ifp->refcnt);
243 }
244
245
246 /*
247 * compute link-local solicited-node multicast address
248 */
249
addrconf_addr_solict_mult(const struct in6_addr * addr,struct in6_addr * solicited)250 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
251 struct in6_addr *solicited)
252 {
253 ipv6_addr_set(solicited,
254 htonl(0xFF020000), 0,
255 htonl(0x1),
256 htonl(0xFF000000) | addr->s6_addr32[3]);
257 }
258
ipv6_addr_is_multicast(const struct in6_addr * addr)259 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
260 {
261 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
262 }
263
ipv6_addr_is_ll_all_nodes(const struct in6_addr * addr)264 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
265 {
266 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
267 addr->s6_addr32[1] | addr->s6_addr32[2] |
268 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
269 }
270
ipv6_addr_is_ll_all_routers(const struct in6_addr * addr)271 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
272 {
273 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
274 addr->s6_addr32[1] | addr->s6_addr32[2] |
275 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
276 }
277
ipv6_addr_is_isatap(const struct in6_addr * addr)278 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
279 {
280 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
281 }
282
283 #ifdef CONFIG_PROC_FS
284 extern int if6_proc_init(void);
285 extern void if6_proc_exit(void);
286 #endif
287
288 #endif
289