Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _ADDRCONF_H |
2 | #define _ADDRCONF_H | |
3 | ||
1da177e4 LT |
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) | |
76f793e3 | 11 | #define REGEN_MAX_RETRY (3) |
1da177e4 LT |
12 | #define MAX_DESYNC_FACTOR (600) |
13 | ||
14 | #define ADDR_CHECK_FREQUENCY (120*HZ) | |
15 | ||
16 | #define IPV6_MAX_ADDRESSES 16 | |
17 | ||
5c766d64 JP |
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 | ||
c7dc89c0 | 22 | #include <linux/in.h> |
6a800d45 PM |
23 | #include <linux/in6.h> |
24 | ||
1da177e4 LT |
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 | |
e69a4adc AV |
41 | __be32 valid; |
42 | __be32 prefered; | |
43 | __be32 reserved2; | |
1da177e4 LT |
44 | |
45 | struct in6_addr prefix; | |
46 | }; | |
47 | ||
48 | ||
1da177e4 LT |
49 | #include <linux/netdevice.h> |
50 | #include <net/if_inet6.h> | |
e4553edd | 51 | #include <net/ipv6.h> |
1da177e4 | 52 | |
ddbe5032 ED |
53 | #define IN6_ADDR_HSIZE_SHIFT 4 |
54 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) | |
1da177e4 LT |
55 | |
56 | extern int addrconf_init(void); | |
57 | extern void addrconf_cleanup(void); | |
58 | ||
af284937 DL |
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); | |
1da177e4 | 65 | |
bfeade08 | 66 | extern int ipv6_chk_addr(struct net *net, |
b71d1d42 | 67 | const struct in6_addr *addr, |
1da177e4 LT |
68 | struct net_device *dev, |
69 | int strict); | |
bfeade08 | 70 | |
59fbb3a6 | 71 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
389f6612 | 72 | extern int ipv6_chk_home_addr(struct net *net, |
b71d1d42 | 73 | const struct in6_addr *addr); |
65d4ed92 | 74 | #endif |
52eeeb84 | 75 | |
b71d1d42 | 76 | extern int ipv6_chk_prefix(const struct in6_addr *addr, |
52eeeb84 YH |
77 | struct net_device *dev); |
78 | ||
1cab3da6 | 79 | extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
9acd9f3a | 80 | const struct in6_addr *addr, |
1cab3da6 DL |
81 | struct net_device *dev, |
82 | int strict); | |
83 | ||
191cd582 | 84 | extern int ipv6_dev_get_saddr(struct net *net, |
b3f644fc | 85 | const struct net_device *dev, |
9acd9f3a | 86 | const struct in6_addr *daddr, |
7cbca67c | 87 | unsigned int srcprefs, |
1da177e4 | 88 | struct in6_addr *saddr); |
95c385b4 NH |
89 | extern int ipv6_get_lladdr(struct net_device *dev, |
90 | struct in6_addr *addr, | |
91 | unsigned char banned_flags); | |
b2f5e7cd VY |
92 | extern int ipv6_rcv_saddr_equal(const struct sock *sk, |
93 | const struct sock *sk2); | |
1da177e4 | 94 | extern void addrconf_join_solict(struct net_device *dev, |
b71d1d42 | 95 | const struct in6_addr *addr); |
1da177e4 | 96 | extern void addrconf_leave_solict(struct inet6_dev *idev, |
b71d1d42 | 97 | const struct in6_addr *addr); |
1da177e4 | 98 | |
4bed72e4 | 99 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 100 | unsigned int unit) |
4bed72e4 YH |
101 | { |
102 | if (timeout == 0xffffffff) | |
103 | return ~0UL; | |
104 | ||
105 | /* | |
106 | * Avoid arithmetic overflow. | |
107 | * Assuming unit is constant and non-zero, this "if" statement | |
108 | * will go away on 64bit archs. | |
109 | */ | |
110 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
111 | return LONG_MAX / unit; | |
112 | ||
113 | return timeout; | |
114 | } | |
115 | ||
116 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
117 | { | |
118 | return ~timeout; | |
119 | } | |
120 | ||
2a8cc6c8 YH |
121 | /* |
122 | * IPv6 Address Label subsystem (addrlabel.c) | |
123 | */ | |
124 | extern int ipv6_addr_label_init(void); | |
2cc6d2bf | 125 | extern void ipv6_addr_label_cleanup(void); |
2a8cc6c8 | 126 | extern void ipv6_addr_label_rtnl_register(void); |
3de23255 BT |
127 | extern u32 ipv6_addr_label(struct net *net, |
128 | const struct in6_addr *addr, | |
2a8cc6c8 YH |
129 | int type, int ifindex); |
130 | ||
1da177e4 LT |
131 | /* |
132 | * multicast prototypes (mcast.c) | |
133 | */ | |
9acd9f3a YH |
134 | extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
135 | const struct in6_addr *addr); | |
136 | extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
137 | const struct in6_addr *addr); | |
1da177e4 | 138 | extern void ipv6_sock_mc_close(struct sock *sk); |
a50feda5 ED |
139 | extern bool inet6_mc_check(struct sock *sk, |
140 | const struct in6_addr *mc_addr, | |
141 | const struct in6_addr *src_addr); | |
1da177e4 | 142 | |
9acd9f3a YH |
143 | extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); |
144 | extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
145 | extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
1da177e4 LT |
146 | extern void ipv6_mc_up(struct inet6_dev *idev); |
147 | extern void ipv6_mc_down(struct inet6_dev *idev); | |
75c78500 MS |
148 | extern void ipv6_mc_unmap(struct inet6_dev *idev); |
149 | extern void ipv6_mc_remap(struct inet6_dev *idev); | |
1da177e4 LT |
150 | extern void ipv6_mc_init_dev(struct inet6_dev *idev); |
151 | extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
152 | extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); | |
153 | ||
a50feda5 ED |
154 | extern bool ipv6_chk_mcast_addr(struct net_device *dev, |
155 | const struct in6_addr *group, | |
156 | const struct in6_addr *src_addr); | |
daad1512 YH |
157 | |
158 | /* | |
159 | * identify MLD packets for MLD filter exceptions | |
160 | */ | |
161 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
162 | { | |
163 | struct icmp6hdr *hdr; | |
164 | ||
165 | if (nexthdr != IPPROTO_ICMPV6 || | |
166 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
167 | return false; | |
168 | ||
169 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
170 | ||
171 | switch (hdr->icmp6_type) { | |
172 | case ICMPV6_MGM_QUERY: | |
173 | case ICMPV6_MGM_REPORT: | |
174 | case ICMPV6_MGM_REDUCTION: | |
175 | case ICMPV6_MLD2_REPORT: | |
176 | return true; | |
177 | default: | |
178 | break; | |
179 | } | |
180 | return false; | |
181 | } | |
1da177e4 | 182 | |
e6bff995 NH |
183 | extern void addrconf_prefix_rcv(struct net_device *dev, |
184 | u8 *opt, int len, bool sllao); | |
1da177e4 | 185 | |
1da177e4 LT |
186 | /* |
187 | * anycast prototypes (anycast.c) | |
188 | */ | |
b71d1d42 ED |
189 | extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr); |
190 | extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr); | |
1da177e4 | 191 | extern void ipv6_sock_ac_close(struct sock *sk); |
1da177e4 | 192 | |
b71d1d42 ED |
193 | extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); |
194 | extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
a50feda5 ED |
195 | extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
196 | const struct in6_addr *addr); | |
1da177e4 LT |
197 | |
198 | ||
199 | /* Device notifier */ | |
200 | extern int register_inet6addr_notifier(struct notifier_block *nb); | |
201 | extern int unregister_inet6addr_notifier(struct notifier_block *nb); | |
f88c91dd | 202 | extern int inet6addr_notifier_call_chain(unsigned long val, void *v); |
1da177e4 | 203 | |
d67b8c61 ND |
204 | extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
205 | struct ipv6_devconf *devconf); | |
206 | ||
48daa3bb ED |
207 | /** |
208 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
209 | * @dev: network device | |
210 | * | |
211 | * Caller must hold rcu_read_lock or RTNL, because this function | |
212 | * does not take a reference on the inet6_dev. | |
213 | */ | |
214 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 215 | { |
48daa3bb | 216 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
217 | } |
218 | ||
48daa3bb ED |
219 | /** |
220 | * in6_dev_get - get inet6_dev pointer from netdevice | |
221 | * @dev: network device | |
222 | * | |
223 | * This version can be used in any context, and takes a reference | |
224 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
225 | * release this reference. | |
226 | */ | |
227 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 228 | { |
48daa3bb ED |
229 | struct inet6_dev *idev; |
230 | ||
8814c4b5 | 231 | rcu_read_lock(); |
48daa3bb | 232 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 LT |
233 | if (idev) |
234 | atomic_inc(&idev->refcnt); | |
8814c4b5 | 235 | rcu_read_unlock(); |
1da177e4 LT |
236 | return idev; |
237 | } | |
238 | ||
239 | extern void in6_dev_finish_destroy(struct inet6_dev *idev); | |
240 | ||
48daa3bb | 241 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 LT |
242 | { |
243 | if (atomic_dec_and_test(&idev->refcnt)) | |
244 | in6_dev_finish_destroy(idev); | |
245 | } | |
246 | ||
48daa3bb ED |
247 | static inline void __in6_dev_put(struct inet6_dev *idev) |
248 | { | |
249 | atomic_dec(&idev->refcnt); | |
250 | } | |
1da177e4 | 251 | |
48daa3bb ED |
252 | static inline void in6_dev_hold(struct inet6_dev *idev) |
253 | { | |
254 | atomic_inc(&idev->refcnt); | |
255 | } | |
1da177e4 LT |
256 | |
257 | extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); | |
258 | ||
259 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
260 | { | |
261 | if (atomic_dec_and_test(&ifp->refcnt)) | |
262 | inet6_ifa_finish_destroy(ifp); | |
263 | } | |
264 | ||
48daa3bb ED |
265 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
266 | { | |
267 | atomic_dec(&ifp->refcnt); | |
268 | } | |
1da177e4 | 269 | |
48daa3bb ED |
270 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
271 | { | |
272 | atomic_inc(&ifp->refcnt); | |
273 | } | |
1da177e4 | 274 | |
1da177e4 LT |
275 | |
276 | /* | |
277 | * compute link-local solicited-node multicast address | |
278 | */ | |
279 | ||
280 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
281 | struct in6_addr *solicited) | |
282 | { | |
283 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
284 | htonl(0xFF020000), 0, |
285 | htonl(0x1), | |
286 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
287 | } |
288 | ||
b27b28cb | 289 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
1da177e4 | 290 | { |
0e7b8dcd | 291 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
1da177e4 LT |
292 | } |
293 | ||
b27b28cb | 294 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 295 | { |
d1641565 YH |
296 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
297 | __u64 *p = (__u64 *)addr; | |
298 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; | |
299 | #else | |
48daa3bb | 300 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 301 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 302 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 303 | #endif |
1da177e4 LT |
304 | } |
305 | ||
b27b28cb | 306 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 307 | { |
d1641565 YH |
308 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
309 | __u64 *p = (__u64 *)addr; | |
310 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; | |
311 | #else | |
48daa3bb | 312 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 313 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 314 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 315 | #endif |
1da177e4 LT |
316 | } |
317 | ||
b27b28cb | 318 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 319 | { |
48daa3bb | 320 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
321 | } |
322 | ||
ca97a644 YH |
323 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
324 | { | |
9d100774 YH |
325 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
326 | __u64 *p = (__u64 *)addr; | |
327 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | | |
328 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
329 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
330 | #else | |
331 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
332 | addr->s6_addr32[1] | | |
333 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
334 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
335 | #endif | |
ca97a644 YH |
336 | } |
337 | ||
20380731 ACM |
338 | #ifdef CONFIG_PROC_FS |
339 | extern int if6_proc_init(void); | |
340 | extern void if6_proc_exit(void); | |
341 | #endif | |
342 | ||
1da177e4 | 343 | #endif |