]> rtime.felk.cvut.cz Git - can-eth-gw-linux.git/blob - include/net/addrconf.h
Fix bug
[can-eth-gw-linux.git] / include / net / addrconf.h
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_SHIFT    4
50 #define IN6_ADDR_HSIZE          (1 << IN6_ADDR_HSIZE_SHIFT)
51
52 extern int                      addrconf_init(void);
53 extern void                     addrconf_cleanup(void);
54
55 extern int                      addrconf_add_ifaddr(struct net *net,
56                                                     void __user *arg);
57 extern int                      addrconf_del_ifaddr(struct net *net,
58                                                     void __user *arg);
59 extern int                      addrconf_set_dstaddr(struct net *net,
60                                                      void __user *arg);
61
62 extern int                      ipv6_chk_addr(struct net *net,
63                                               const 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                                                    const struct in6_addr *addr);
70 #endif
71
72 extern int                      ipv6_chk_prefix(const struct in6_addr *addr,
73                                                 struct net_device *dev);
74
75 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
76                                                  const struct in6_addr *addr,
77                                                  struct net_device *dev,
78                                                  int strict);
79
80 extern int                      ipv6_dev_get_saddr(struct net *net,
81                                                const struct net_device *dev,
82                                                const struct in6_addr *daddr,
83                                                unsigned int srcprefs,
84                                                struct in6_addr *saddr);
85 extern int                      ipv6_get_lladdr(struct net_device *dev,
86                                                 struct in6_addr *addr,
87                                                 unsigned char banned_flags);
88 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
89                                                     const struct sock *sk2);
90 extern void                     addrconf_join_solict(struct net_device *dev,
91                                         const struct in6_addr *addr);
92 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
93                                         const struct in6_addr *addr);
94
95 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
96                                                    unsigned int unit)
97 {
98         if (timeout == 0xffffffff)
99                 return ~0UL;
100
101         /*
102          * Avoid arithmetic overflow.
103          * Assuming unit is constant and non-zero, this "if" statement
104          * will go away on 64bit archs.
105          */
106         if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
107                 return LONG_MAX / unit;
108
109         return timeout;
110 }
111
112 static inline int addrconf_finite_timeout(unsigned long timeout)
113 {
114         return ~timeout;
115 }
116
117 /*
118  *      IPv6 Address Label subsystem (addrlabel.c)
119  */
120 extern int                      ipv6_addr_label_init(void);
121 extern void                     ipv6_addr_label_cleanup(void);
122 extern void                     ipv6_addr_label_rtnl_register(void);
123 extern u32                      ipv6_addr_label(struct net *net,
124                                                 const struct in6_addr *addr,
125                                                 int type, int ifindex);
126
127 /*
128  *      multicast prototypes (mcast.c)
129  */
130 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
131                              const struct in6_addr *addr);
132 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
133                              const struct in6_addr *addr);
134 extern void ipv6_sock_mc_close(struct sock *sk);
135 extern bool inet6_mc_check(struct sock *sk,
136                            const struct in6_addr *mc_addr,
137                            const struct in6_addr *src_addr);
138
139 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
140 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
141 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
142 extern void ipv6_mc_up(struct inet6_dev *idev);
143 extern void ipv6_mc_down(struct inet6_dev *idev);
144 extern void ipv6_mc_unmap(struct inet6_dev *idev);
145 extern void ipv6_mc_remap(struct inet6_dev *idev);
146 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
147 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
148 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
149
150 extern bool ipv6_chk_mcast_addr(struct net_device *dev,
151                                 const struct in6_addr *group,
152                                 const struct in6_addr *src_addr);
153 extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
154
155 extern void addrconf_prefix_rcv(struct net_device *dev,
156                                 u8 *opt, int len, bool sllao);
157
158 /*
159  *      anycast prototypes (anycast.c)
160  */
161 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
162 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
163 extern void ipv6_sock_ac_close(struct sock *sk);
164
165 extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
166 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
167 extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
168                                 const struct in6_addr *addr);
169
170
171 /* Device notifier */
172 extern int register_inet6addr_notifier(struct notifier_block *nb);
173 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
174
175 extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
176                                          struct ipv6_devconf *devconf);
177
178 /**
179  * __in6_dev_get - get inet6_dev pointer from netdevice
180  * @dev: network device
181  *
182  * Caller must hold rcu_read_lock or RTNL, because this function
183  * does not take a reference on the inet6_dev.
184  */
185 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
186 {
187         return rcu_dereference_rtnl(dev->ip6_ptr);
188 }
189
190 /**
191  * in6_dev_get - get inet6_dev pointer from netdevice
192  * @dev: network device
193  *
194  * This version can be used in any context, and takes a reference
195  * on the inet6_dev. Callers must use in6_dev_put() later to
196  * release this reference.
197  */
198 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
199 {
200         struct inet6_dev *idev;
201
202         rcu_read_lock();
203         idev = rcu_dereference(dev->ip6_ptr);
204         if (idev)
205                 atomic_inc(&idev->refcnt);
206         rcu_read_unlock();
207         return idev;
208 }
209
210 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
211
212 static inline void in6_dev_put(struct inet6_dev *idev)
213 {
214         if (atomic_dec_and_test(&idev->refcnt))
215                 in6_dev_finish_destroy(idev);
216 }
217
218 static inline void __in6_dev_put(struct inet6_dev *idev)
219 {
220         atomic_dec(&idev->refcnt);
221 }
222
223 static inline void in6_dev_hold(struct inet6_dev *idev)
224 {
225         atomic_inc(&idev->refcnt);
226 }
227
228 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
229
230 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
231 {
232         if (atomic_dec_and_test(&ifp->refcnt))
233                 inet6_ifa_finish_destroy(ifp);
234 }
235
236 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
237 {
238         atomic_dec(&ifp->refcnt);
239 }
240
241 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
242 {
243         atomic_inc(&ifp->refcnt);
244 }
245
246
247 /*
248  *      compute link-local solicited-node multicast address
249  */
250
251 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
252                                              struct in6_addr *solicited)
253 {
254         ipv6_addr_set(solicited,
255                       htonl(0xFF020000), 0,
256                       htonl(0x1),
257                       htonl(0xFF000000) | addr->s6_addr32[3]);
258 }
259
260 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
261 {
262         return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
263 }
264
265 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
266 {
267         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
268                 addr->s6_addr32[1] | addr->s6_addr32[2] |
269                 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
270 }
271
272 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
273 {
274         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
275                 addr->s6_addr32[1] | addr->s6_addr32[2] |
276                 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
277 }
278
279 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
280 {
281         return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
282 }
283
284 #ifdef CONFIG_PROC_FS
285 extern int if6_proc_init(void);
286 extern void if6_proc_exit(void);
287 #endif
288
289 #endif