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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 | 55 | |
e8e54d3c JP |
56 | int addrconf_init(void); |
57 | void addrconf_cleanup(void); | |
1da177e4 | 58 | |
e8e54d3c JP |
59 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
60 | int addrconf_del_ifaddr(struct net *net, void __user *arg); | |
61 | int addrconf_set_dstaddr(struct net *net, void __user *arg); | |
1da177e4 | 62 | |
e8e54d3c JP |
63 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
64 | const struct net_device *dev, int strict); | |
bfeade08 | 65 | |
59fbb3a6 | 66 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 67 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 68 | #endif |
52eeeb84 | 69 | |
7df37ff3 CB |
70 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
71 | const unsigned int prefix_len, | |
72 | struct net_device *dev); | |
73 | ||
e8e54d3c JP |
74 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
75 | ||
76 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
77 | const struct in6_addr *addr, | |
78 | struct net_device *dev, int strict); | |
79 | ||
80 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
81 | const struct in6_addr *daddr, unsigned int srcprefs, | |
82 | struct in6_addr *saddr); | |
83 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
84 | unsigned char banned_flags); | |
85 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, | |
86 | unsigned char banned_flags); | |
87 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2); | |
88 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); | |
89 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 90 | |
4bed72e4 | 91 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 92 | unsigned int unit) |
4bed72e4 YH |
93 | { |
94 | if (timeout == 0xffffffff) | |
95 | return ~0UL; | |
96 | ||
97 | /* | |
98 | * Avoid arithmetic overflow. | |
99 | * Assuming unit is constant and non-zero, this "if" statement | |
100 | * will go away on 64bit archs. | |
101 | */ | |
102 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
103 | return LONG_MAX / unit; | |
104 | ||
105 | return timeout; | |
106 | } | |
107 | ||
108 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
109 | { | |
110 | return ~timeout; | |
111 | } | |
112 | ||
2a8cc6c8 YH |
113 | /* |
114 | * IPv6 Address Label subsystem (addrlabel.c) | |
115 | */ | |
e8e54d3c JP |
116 | int ipv6_addr_label_init(void); |
117 | void ipv6_addr_label_cleanup(void); | |
118 | void ipv6_addr_label_rtnl_register(void); | |
119 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
120 | int type, int ifindex); | |
2a8cc6c8 | 121 | |
1da177e4 LT |
122 | /* |
123 | * multicast prototypes (mcast.c) | |
124 | */ | |
e8e54d3c JP |
125 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
126 | const struct in6_addr *addr); | |
127 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
128 | const struct in6_addr *addr); | |
129 | void ipv6_sock_mc_close(struct sock *sk); | |
130 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
131 | const struct in6_addr *src_addr); | |
132 | ||
133 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
134 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
135 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
136 | void ipv6_mc_up(struct inet6_dev *idev); | |
137 | void ipv6_mc_down(struct inet6_dev *idev); | |
138 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
139 | void ipv6_mc_remap(struct inet6_dev *idev); | |
140 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
141 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
142 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); | |
143 | ||
144 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
145 | const struct in6_addr *src_addr); | |
146 | ||
147 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
148 | |
149 | /* A stub used by vxlan module. This is ugly, ideally these | |
150 | * symbols should be built into the core kernel. | |
151 | */ | |
152 | struct ipv6_stub { | |
153 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
154 | const struct in6_addr *addr); | |
155 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
156 | const struct in6_addr *addr); | |
157 | int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst, | |
158 | struct flowi6 *fl6); | |
159 | void (*udpv6_encap_enable)(void); | |
f564f45c CW |
160 | void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh, |
161 | const struct in6_addr *daddr, | |
162 | const struct in6_addr *solicited_addr, | |
163 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 164 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
165 | }; |
166 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
167 | ||
daad1512 YH |
168 | /* |
169 | * identify MLD packets for MLD filter exceptions | |
170 | */ | |
171 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
172 | { | |
173 | struct icmp6hdr *hdr; | |
174 | ||
175 | if (nexthdr != IPPROTO_ICMPV6 || | |
176 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
177 | return false; | |
178 | ||
179 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
180 | ||
181 | switch (hdr->icmp6_type) { | |
182 | case ICMPV6_MGM_QUERY: | |
183 | case ICMPV6_MGM_REPORT: | |
184 | case ICMPV6_MGM_REDUCTION: | |
185 | case ICMPV6_MLD2_REPORT: | |
186 | return true; | |
187 | default: | |
188 | break; | |
189 | } | |
190 | return false; | |
191 | } | |
1da177e4 | 192 | |
e8e54d3c JP |
193 | void addrconf_prefix_rcv(struct net_device *dev, |
194 | u8 *opt, int len, bool sllao); | |
1da177e4 | 195 | |
1da177e4 LT |
196 | /* |
197 | * anycast prototypes (anycast.c) | |
198 | */ | |
e8e54d3c JP |
199 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
200 | const struct in6_addr *addr); | |
201 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
202 | const struct in6_addr *addr); | |
203 | void ipv6_sock_ac_close(struct sock *sk); | |
204 | ||
205 | int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); | |
206 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
207 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, | |
a50feda5 | 208 | const struct in6_addr *addr); |
1da177e4 LT |
209 | |
210 | ||
211 | /* Device notifier */ | |
e8e54d3c JP |
212 | int register_inet6addr_notifier(struct notifier_block *nb); |
213 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
214 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 215 | |
e8e54d3c JP |
216 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
217 | struct ipv6_devconf *devconf); | |
d67b8c61 | 218 | |
48daa3bb ED |
219 | /** |
220 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
221 | * @dev: network device | |
222 | * | |
223 | * Caller must hold rcu_read_lock or RTNL, because this function | |
224 | * does not take a reference on the inet6_dev. | |
225 | */ | |
226 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 227 | { |
48daa3bb | 228 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
229 | } |
230 | ||
48daa3bb ED |
231 | /** |
232 | * in6_dev_get - get inet6_dev pointer from netdevice | |
233 | * @dev: network device | |
234 | * | |
235 | * This version can be used in any context, and takes a reference | |
236 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
237 | * release this reference. | |
238 | */ | |
239 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 240 | { |
48daa3bb ED |
241 | struct inet6_dev *idev; |
242 | ||
8814c4b5 | 243 | rcu_read_lock(); |
48daa3bb | 244 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 LT |
245 | if (idev) |
246 | atomic_inc(&idev->refcnt); | |
8814c4b5 | 247 | rcu_read_unlock(); |
1da177e4 LT |
248 | return idev; |
249 | } | |
250 | ||
e8e54d3c | 251 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 252 | |
48daa3bb | 253 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 LT |
254 | { |
255 | if (atomic_dec_and_test(&idev->refcnt)) | |
256 | in6_dev_finish_destroy(idev); | |
257 | } | |
258 | ||
48daa3bb ED |
259 | static inline void __in6_dev_put(struct inet6_dev *idev) |
260 | { | |
261 | atomic_dec(&idev->refcnt); | |
262 | } | |
1da177e4 | 263 | |
48daa3bb ED |
264 | static inline void in6_dev_hold(struct inet6_dev *idev) |
265 | { | |
266 | atomic_inc(&idev->refcnt); | |
267 | } | |
1da177e4 | 268 | |
e8e54d3c | 269 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
270 | |
271 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
272 | { | |
273 | if (atomic_dec_and_test(&ifp->refcnt)) | |
274 | inet6_ifa_finish_destroy(ifp); | |
275 | } | |
276 | ||
48daa3bb ED |
277 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
278 | { | |
279 | atomic_dec(&ifp->refcnt); | |
280 | } | |
1da177e4 | 281 | |
48daa3bb ED |
282 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
283 | { | |
284 | atomic_inc(&ifp->refcnt); | |
285 | } | |
1da177e4 | 286 | |
1da177e4 LT |
287 | |
288 | /* | |
289 | * compute link-local solicited-node multicast address | |
290 | */ | |
291 | ||
292 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
293 | struct in6_addr *solicited) | |
294 | { | |
295 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
296 | htonl(0xFF020000), 0, |
297 | htonl(0x1), | |
298 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
299 | } |
300 | ||
b27b28cb | 301 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
1da177e4 | 302 | { |
0e7b8dcd | 303 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
1da177e4 LT |
304 | } |
305 | ||
b27b28cb | 306 | static inline bool ipv6_addr_is_ll_all_nodes(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(1))) == 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(0x00000001))) == 0; |
d1641565 | 315 | #endif |
1da177e4 LT |
316 | } |
317 | ||
b27b28cb | 318 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 319 | { |
d1641565 YH |
320 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
321 | __u64 *p = (__u64 *)addr; | |
322 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; | |
323 | #else | |
48daa3bb | 324 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 325 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 326 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 327 | #endif |
1da177e4 LT |
328 | } |
329 | ||
b27b28cb | 330 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 331 | { |
48daa3bb | 332 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
333 | } |
334 | ||
ca97a644 YH |
335 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
336 | { | |
9d100774 YH |
337 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
338 | __u64 *p = (__u64 *)addr; | |
339 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | | |
340 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
341 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
342 | #else | |
343 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
344 | addr->s6_addr32[1] | | |
345 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
346 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
347 | #endif | |
ca97a644 YH |
348 | } |
349 | ||
20380731 | 350 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
351 | int if6_proc_init(void); |
352 | void if6_proc_exit(void); | |
20380731 ACM |
353 | #endif |
354 | ||
1da177e4 | 355 | #endif |