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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 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
19 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) |
20 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) |
21 | |
22 | #include <linux/in.h> |
23 | #include <linux/in6.h> |
24 | |
25 | struct prefix_info { |
26 | __u8 type; |
27 | __u8 length; |
28 | __u8 prefix_len; |
29 | |
30 | #if defined(__BIG_ENDIAN_BITFIELD) |
31 | __u8 onlink : 1, |
32 | autoconf : 1, |
33 | reserved : 6; |
34 | #elif defined(__LITTLE_ENDIAN_BITFIELD) |
35 | __u8 reserved : 6, |
36 | autoconf : 1, |
37 | onlink : 1; |
38 | #else |
39 | #error "Please fix <asm/byteorder.h>" |
40 | #endif |
41 | __be32 valid; |
42 | __be32 prefered; |
43 | __be32 reserved2; |
44 | |
45 | struct in6_addr prefix; |
46 | }; |
47 | |
48 | |
49 | #include <linux/netdevice.h> |
50 | #include <net/if_inet6.h> |
51 | #include <net/ipv6.h> |
52 | |
53 | #define IN6_ADDR_HSIZE_SHIFT 4 |
54 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) |
55 | |
56 | extern int addrconf_init(void); |
57 | extern void addrconf_cleanup(void); |
58 | |
59 | extern int addrconf_add_ifaddr(struct net *net, |
60 | void __user *arg); |
61 | extern int addrconf_del_ifaddr(struct net *net, |
62 | void __user *arg); |
63 | extern int addrconf_set_dstaddr(struct net *net, |
64 | void __user *arg); |
65 | |
66 | extern int ipv6_chk_addr(struct net *net, |
67 | const struct in6_addr *addr, |
68 | const struct net_device *dev, |
69 | int strict); |
70 | |
71 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
72 | extern int ipv6_chk_home_addr(struct net *net, |
73 | const struct in6_addr *addr); |
74 | #endif |
75 | |
76 | extern int ipv6_chk_prefix(const struct in6_addr *addr, |
77 | struct net_device *dev); |
78 | |
79 | extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
80 | const struct in6_addr *addr, |
81 | struct net_device *dev, |
82 | int strict); |
83 | |
84 | extern int ipv6_dev_get_saddr(struct net *net, |
85 | const struct net_device *dev, |
86 | const struct in6_addr *daddr, |
87 | unsigned int srcprefs, |
88 | struct in6_addr *saddr); |
89 | extern int __ipv6_get_lladdr(struct inet6_dev *idev, |
90 | struct in6_addr *addr, |
91 | unsigned char banned_flags); |
92 | extern int ipv6_get_lladdr(struct net_device *dev, |
93 | struct in6_addr *addr, |
94 | unsigned char banned_flags); |
95 | extern int ipv6_rcv_saddr_equal(const struct sock *sk, |
96 | const struct sock *sk2); |
97 | extern void addrconf_join_solict(struct net_device *dev, |
98 | const struct in6_addr *addr); |
99 | extern void addrconf_leave_solict(struct inet6_dev *idev, |
100 | const struct in6_addr *addr); |
101 | |
102 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
103 | unsigned int unit) |
104 | { |
105 | if (timeout == 0xffffffff) |
106 | return ~0UL; |
107 | |
108 | /* |
109 | * Avoid arithmetic overflow. |
110 | * Assuming unit is constant and non-zero, this "if" statement |
111 | * will go away on 64bit archs. |
112 | */ |
113 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) |
114 | return LONG_MAX / unit; |
115 | |
116 | return timeout; |
117 | } |
118 | |
119 | static inline int addrconf_finite_timeout(unsigned long timeout) |
120 | { |
121 | return ~timeout; |
122 | } |
123 | |
124 | /* |
125 | * IPv6 Address Label subsystem (addrlabel.c) |
126 | */ |
127 | extern int ipv6_addr_label_init(void); |
128 | extern void ipv6_addr_label_cleanup(void); |
129 | extern void ipv6_addr_label_rtnl_register(void); |
130 | extern u32 ipv6_addr_label(struct net *net, |
131 | const struct in6_addr *addr, |
132 | int type, int ifindex); |
133 | |
134 | /* |
135 | * multicast prototypes (mcast.c) |
136 | */ |
137 | extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
138 | const struct in6_addr *addr); |
139 | extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
140 | const struct in6_addr *addr); |
141 | extern void ipv6_sock_mc_close(struct sock *sk); |
142 | extern bool inet6_mc_check(struct sock *sk, |
143 | const struct in6_addr *mc_addr, |
144 | const struct in6_addr *src_addr); |
145 | |
146 | extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); |
147 | extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
148 | extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); |
149 | extern void ipv6_mc_up(struct inet6_dev *idev); |
150 | extern void ipv6_mc_down(struct inet6_dev *idev); |
151 | extern void ipv6_mc_unmap(struct inet6_dev *idev); |
152 | extern void ipv6_mc_remap(struct inet6_dev *idev); |
153 | extern void ipv6_mc_init_dev(struct inet6_dev *idev); |
154 | extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); |
155 | extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
156 | |
157 | extern bool ipv6_chk_mcast_addr(struct net_device *dev, |
158 | const struct in6_addr *group, |
159 | const struct in6_addr *src_addr); |
160 | |
161 | extern void ipv6_mc_dad_complete(struct inet6_dev *idev); |
162 | /* |
163 | * identify MLD packets for MLD filter exceptions |
164 | */ |
165 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) |
166 | { |
167 | struct icmp6hdr *hdr; |
168 | |
169 | if (nexthdr != IPPROTO_ICMPV6 || |
170 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) |
171 | return false; |
172 | |
173 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); |
174 | |
175 | switch (hdr->icmp6_type) { |
176 | case ICMPV6_MGM_QUERY: |
177 | case ICMPV6_MGM_REPORT: |
178 | case ICMPV6_MGM_REDUCTION: |
179 | case ICMPV6_MLD2_REPORT: |
180 | return true; |
181 | default: |
182 | break; |
183 | } |
184 | return false; |
185 | } |
186 | |
187 | extern void addrconf_prefix_rcv(struct net_device *dev, |
188 | u8 *opt, int len, bool sllao); |
189 | |
190 | /* |
191 | * anycast prototypes (anycast.c) |
192 | */ |
193 | extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr); |
194 | extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr); |
195 | extern void ipv6_sock_ac_close(struct sock *sk); |
196 | |
197 | extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); |
198 | extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
199 | extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
200 | const struct in6_addr *addr); |
201 | |
202 | |
203 | /* Device notifier */ |
204 | extern int register_inet6addr_notifier(struct notifier_block *nb); |
205 | extern int unregister_inet6addr_notifier(struct notifier_block *nb); |
206 | extern int inet6addr_notifier_call_chain(unsigned long val, void *v); |
207 | |
208 | extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
209 | struct ipv6_devconf *devconf); |
210 | |
211 | /** |
212 | * __in6_dev_get - get inet6_dev pointer from netdevice |
213 | * @dev: network device |
214 | * |
215 | * Caller must hold rcu_read_lock or RTNL, because this function |
216 | * does not take a reference on the inet6_dev. |
217 | */ |
218 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) |
219 | { |
220 | return rcu_dereference_rtnl(dev->ip6_ptr); |
221 | } |
222 | |
223 | /** |
224 | * in6_dev_get - get inet6_dev pointer from netdevice |
225 | * @dev: network device |
226 | * |
227 | * This version can be used in any context, and takes a reference |
228 | * on the inet6_dev. Callers must use in6_dev_put() later to |
229 | * release this reference. |
230 | */ |
231 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) |
232 | { |
233 | struct inet6_dev *idev; |
234 | |
235 | rcu_read_lock(); |
236 | idev = rcu_dereference(dev->ip6_ptr); |
237 | if (idev) |
238 | atomic_inc(&idev->refcnt); |
239 | rcu_read_unlock(); |
240 | return idev; |
241 | } |
242 | |
243 | extern void in6_dev_finish_destroy(struct inet6_dev *idev); |
244 | |
245 | static inline void in6_dev_put(struct inet6_dev *idev) |
246 | { |
247 | if (atomic_dec_and_test(&idev->refcnt)) |
248 | in6_dev_finish_destroy(idev); |
249 | } |
250 | |
251 | static inline void __in6_dev_put(struct inet6_dev *idev) |
252 | { |
253 | atomic_dec(&idev->refcnt); |
254 | } |
255 | |
256 | static inline void in6_dev_hold(struct inet6_dev *idev) |
257 | { |
258 | atomic_inc(&idev->refcnt); |
259 | } |
260 | |
261 | extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
262 | |
263 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) |
264 | { |
265 | if (atomic_dec_and_test(&ifp->refcnt)) |
266 | inet6_ifa_finish_destroy(ifp); |
267 | } |
268 | |
269 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
270 | { |
271 | atomic_dec(&ifp->refcnt); |
272 | } |
273 | |
274 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
275 | { |
276 | atomic_inc(&ifp->refcnt); |
277 | } |
278 | |
279 | |
280 | /* |
281 | * compute link-local solicited-node multicast address |
282 | */ |
283 | |
284 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, |
285 | struct in6_addr *solicited) |
286 | { |
287 | ipv6_addr_set(solicited, |
288 | htonl(0xFF020000), 0, |
289 | htonl(0x1), |
290 | htonl(0xFF000000) | addr->s6_addr32[3]); |
291 | } |
292 | |
293 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
294 | { |
295 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
296 | } |
297 | |
298 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
299 | { |
300 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
301 | __u64 *p = (__u64 *)addr; |
302 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
303 | #else |
304 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
305 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
306 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
307 | #endif |
308 | } |
309 | |
310 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
311 | { |
312 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
313 | __u64 *p = (__u64 *)addr; |
314 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
315 | #else |
316 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
317 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
318 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
319 | #endif |
320 | } |
321 | |
322 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
323 | { |
324 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
325 | } |
326 | |
327 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
328 | { |
329 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
330 | __u64 *p = (__u64 *)addr; |
331 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
332 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & |
333 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; |
334 | #else |
335 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
336 | addr->s6_addr32[1] | |
337 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | |
338 | (addr->s6_addr[12] ^ 0xff)) == 0; |
339 | #endif |
340 | } |
341 | |
342 | #ifdef CONFIG_PROC_FS |
343 | extern int if6_proc_init(void); |
344 | extern void if6_proc_exit(void); |
345 | #endif |
346 | |
347 | #endif |
348 |
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