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); | |
c58da4c6 EK |
65 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
66 | const struct net_device *dev, int strict, | |
67 | u32 banned_flags); | |
bfeade08 | 68 | |
59fbb3a6 | 69 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 70 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 71 | #endif |
52eeeb84 | 72 | |
7df37ff3 CB |
73 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
74 | const unsigned int prefix_len, | |
75 | struct net_device *dev); | |
76 | ||
e8e54d3c JP |
77 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
78 | ||
79 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
80 | const struct in6_addr *addr, | |
81 | struct net_device *dev, int strict); | |
82 | ||
83 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
84 | const struct in6_addr *daddr, unsigned int srcprefs, | |
85 | struct in6_addr *saddr); | |
86 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
479840ff | 87 | u32 banned_flags); |
e8e54d3c | 88 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 89 | u32 banned_flags); |
e8e54d3c JP |
90 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2); |
91 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); | |
92 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 93 | |
4bed72e4 | 94 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 95 | unsigned int unit) |
4bed72e4 YH |
96 | { |
97 | if (timeout == 0xffffffff) | |
98 | return ~0UL; | |
99 | ||
100 | /* | |
101 | * Avoid arithmetic overflow. | |
102 | * Assuming unit is constant and non-zero, this "if" statement | |
103 | * will go away on 64bit archs. | |
104 | */ | |
105 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
106 | return LONG_MAX / unit; | |
107 | ||
108 | return timeout; | |
109 | } | |
110 | ||
111 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
112 | { | |
113 | return ~timeout; | |
114 | } | |
115 | ||
2a8cc6c8 YH |
116 | /* |
117 | * IPv6 Address Label subsystem (addrlabel.c) | |
118 | */ | |
e8e54d3c JP |
119 | int ipv6_addr_label_init(void); |
120 | void ipv6_addr_label_cleanup(void); | |
121 | void ipv6_addr_label_rtnl_register(void); | |
122 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
123 | int type, int ifindex); | |
2a8cc6c8 | 124 | |
1da177e4 LT |
125 | /* |
126 | * multicast prototypes (mcast.c) | |
127 | */ | |
e8e54d3c JP |
128 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
129 | const struct in6_addr *addr); | |
130 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
131 | const struct in6_addr *addr); | |
132 | void ipv6_sock_mc_close(struct sock *sk); | |
133 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
134 | const struct in6_addr *src_addr); | |
135 | ||
136 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
137 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
138 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
139 | void ipv6_mc_up(struct inet6_dev *idev); | |
140 | void ipv6_mc_down(struct inet6_dev *idev); | |
141 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
142 | void ipv6_mc_remap(struct inet6_dev *idev); | |
143 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
144 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
9afd85c9 | 145 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
e8e54d3c JP |
146 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
147 | ||
148 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
149 | const struct in6_addr *src_addr); | |
150 | ||
151 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
152 | |
153 | /* A stub used by vxlan module. This is ugly, ideally these | |
154 | * symbols should be built into the core kernel. | |
155 | */ | |
156 | struct ipv6_stub { | |
157 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
158 | const struct in6_addr *addr); | |
159 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
160 | const struct in6_addr *addr); | |
343d60aa RP |
161 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
162 | struct dst_entry **dst, struct flowi6 *fl6); | |
5f81bd2e | 163 | void (*udpv6_encap_enable)(void); |
f564f45c CW |
164 | void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh, |
165 | const struct in6_addr *daddr, | |
166 | const struct in6_addr *solicited_addr, | |
167 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 168 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
169 | }; |
170 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
171 | ||
daad1512 YH |
172 | /* |
173 | * identify MLD packets for MLD filter exceptions | |
174 | */ | |
175 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
176 | { | |
177 | struct icmp6hdr *hdr; | |
178 | ||
179 | if (nexthdr != IPPROTO_ICMPV6 || | |
180 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
181 | return false; | |
182 | ||
183 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
184 | ||
185 | switch (hdr->icmp6_type) { | |
186 | case ICMPV6_MGM_QUERY: | |
187 | case ICMPV6_MGM_REPORT: | |
188 | case ICMPV6_MGM_REDUCTION: | |
189 | case ICMPV6_MLD2_REPORT: | |
190 | return true; | |
191 | default: | |
192 | break; | |
193 | } | |
194 | return false; | |
195 | } | |
1da177e4 | 196 | |
e8e54d3c JP |
197 | void addrconf_prefix_rcv(struct net_device *dev, |
198 | u8 *opt, int len, bool sllao); | |
1da177e4 | 199 | |
1da177e4 LT |
200 | /* |
201 | * anycast prototypes (anycast.c) | |
202 | */ | |
e8e54d3c JP |
203 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
204 | const struct in6_addr *addr); | |
205 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
206 | const struct in6_addr *addr); | |
207 | void ipv6_sock_ac_close(struct sock *sk); | |
208 | ||
013b4d90 | 209 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
e8e54d3c | 210 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
381f4dca | 211 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
e8e54d3c | 212 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
7c90cc2d FLB |
213 | const struct in6_addr *addr); |
214 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, | |
215 | const struct in6_addr *addr); | |
1da177e4 LT |
216 | |
217 | /* Device notifier */ | |
e8e54d3c JP |
218 | int register_inet6addr_notifier(struct notifier_block *nb); |
219 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
220 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 221 | |
e8e54d3c JP |
222 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
223 | struct ipv6_devconf *devconf); | |
d67b8c61 | 224 | |
48daa3bb ED |
225 | /** |
226 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
227 | * @dev: network device | |
228 | * | |
229 | * Caller must hold rcu_read_lock or RTNL, because this function | |
230 | * does not take a reference on the inet6_dev. | |
231 | */ | |
232 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 233 | { |
48daa3bb | 234 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
235 | } |
236 | ||
48daa3bb ED |
237 | /** |
238 | * in6_dev_get - get inet6_dev pointer from netdevice | |
239 | * @dev: network device | |
240 | * | |
241 | * This version can be used in any context, and takes a reference | |
242 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
243 | * release this reference. | |
244 | */ | |
245 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 246 | { |
48daa3bb ED |
247 | struct inet6_dev *idev; |
248 | ||
8814c4b5 | 249 | rcu_read_lock(); |
48daa3bb | 250 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 LT |
251 | if (idev) |
252 | atomic_inc(&idev->refcnt); | |
8814c4b5 | 253 | rcu_read_unlock(); |
1da177e4 LT |
254 | return idev; |
255 | } | |
256 | ||
bba24896 JP |
257 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
258 | { | |
259 | struct inet6_dev *idev = __in6_dev_get(dev); | |
260 | ||
261 | return idev ? idev->nd_parms : NULL; | |
262 | } | |
263 | ||
e8e54d3c | 264 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 265 | |
48daa3bb | 266 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 LT |
267 | { |
268 | if (atomic_dec_and_test(&idev->refcnt)) | |
269 | in6_dev_finish_destroy(idev); | |
270 | } | |
271 | ||
48daa3bb ED |
272 | static inline void __in6_dev_put(struct inet6_dev *idev) |
273 | { | |
274 | atomic_dec(&idev->refcnt); | |
275 | } | |
1da177e4 | 276 | |
48daa3bb ED |
277 | static inline void in6_dev_hold(struct inet6_dev *idev) |
278 | { | |
279 | atomic_inc(&idev->refcnt); | |
280 | } | |
1da177e4 | 281 | |
e8e54d3c | 282 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
283 | |
284 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
285 | { | |
286 | if (atomic_dec_and_test(&ifp->refcnt)) | |
287 | inet6_ifa_finish_destroy(ifp); | |
288 | } | |
289 | ||
48daa3bb ED |
290 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
291 | { | |
292 | atomic_dec(&ifp->refcnt); | |
293 | } | |
1da177e4 | 294 | |
48daa3bb ED |
295 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
296 | { | |
297 | atomic_inc(&ifp->refcnt); | |
298 | } | |
1da177e4 | 299 | |
1da177e4 LT |
300 | |
301 | /* | |
302 | * compute link-local solicited-node multicast address | |
303 | */ | |
304 | ||
305 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
306 | struct in6_addr *solicited) | |
307 | { | |
308 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
309 | htonl(0xFF020000), 0, |
310 | htonl(0x1), | |
311 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
312 | } |
313 | ||
b27b28cb | 314 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 315 | { |
d1641565 | 316 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 317 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
318 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
319 | #else | |
48daa3bb | 320 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 321 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 322 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 323 | #endif |
1da177e4 LT |
324 | } |
325 | ||
b27b28cb | 326 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 327 | { |
d1641565 | 328 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 329 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
330 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
331 | #else | |
48daa3bb | 332 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 333 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 334 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 335 | #endif |
1da177e4 LT |
336 | } |
337 | ||
b27b28cb | 338 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 339 | { |
48daa3bb | 340 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
341 | } |
342 | ||
ca97a644 YH |
343 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
344 | { | |
9d100774 | 345 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 346 | __be64 *p = (__be64 *)addr; |
9d100774 YH |
347 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
348 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
349 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
350 | #else | |
351 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
352 | addr->s6_addr32[1] | | |
353 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
354 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
355 | #endif | |
ca97a644 YH |
356 | } |
357 | ||
20380731 | 358 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
359 | int if6_proc_init(void); |
360 | void if6_proc_exit(void); | |
20380731 ACM |
361 | #endif |
362 | ||
1da177e4 | 363 | #endif |