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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _ADDRCONF_H |
2 | #define _ADDRCONF_H | |
3 | ||
bd11f074 | 4 | #define MAX_RTR_SOLICITATIONS -1 /* unlimited */ |
1da177e4 | 5 | #define RTR_SOLICITATION_INTERVAL (4*HZ) |
bd11f074 | 6 | #define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */ |
1da177e4 LT |
7 | |
8 | #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ | |
9 | ||
10 | #define TEMP_VALID_LIFETIME (7*86400) | |
11 | #define TEMP_PREFERRED_LIFETIME (86400) | |
76f793e3 | 12 | #define REGEN_MAX_RETRY (3) |
1da177e4 LT |
13 | #define MAX_DESYNC_FACTOR (600) |
14 | ||
15 | #define ADDR_CHECK_FREQUENCY (120*HZ) | |
16 | ||
17 | #define IPV6_MAX_ADDRESSES 16 | |
18 | ||
5c766d64 JP |
19 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
20 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) | |
21 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) | |
22 | ||
242d3a49 WC |
23 | #define ADDRCONF_NOTIFY_PRIORITY 0 |
24 | ||
c7dc89c0 | 25 | #include <linux/in.h> |
6a800d45 PM |
26 | #include <linux/in6.h> |
27 | ||
1da177e4 LT |
28 | struct prefix_info { |
29 | __u8 type; | |
30 | __u8 length; | |
31 | __u8 prefix_len; | |
32 | ||
33 | #if defined(__BIG_ENDIAN_BITFIELD) | |
34 | __u8 onlink : 1, | |
35 | autoconf : 1, | |
36 | reserved : 6; | |
37 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
38 | __u8 reserved : 6, | |
39 | autoconf : 1, | |
40 | onlink : 1; | |
41 | #else | |
42 | #error "Please fix <asm/byteorder.h>" | |
43 | #endif | |
e69a4adc AV |
44 | __be32 valid; |
45 | __be32 prefered; | |
46 | __be32 reserved2; | |
1da177e4 LT |
47 | |
48 | struct in6_addr prefix; | |
49 | }; | |
50 | ||
1da177e4 LT |
51 | #include <linux/netdevice.h> |
52 | #include <net/if_inet6.h> | |
e4553edd | 53 | #include <net/ipv6.h> |
1da177e4 | 54 | |
3ad7d246 KJ |
55 | struct in6_validator_info { |
56 | struct in6_addr i6vi_addr; | |
57 | struct inet6_dev *i6vi_dev; | |
58 | }; | |
59 | ||
ddbe5032 ED |
60 | #define IN6_ADDR_HSIZE_SHIFT 4 |
61 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) | |
1da177e4 | 62 | |
e8e54d3c JP |
63 | int addrconf_init(void); |
64 | void addrconf_cleanup(void); | |
1da177e4 | 65 | |
e8e54d3c JP |
66 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
67 | int addrconf_del_ifaddr(struct net *net, void __user *arg); | |
68 | int addrconf_set_dstaddr(struct net *net, void __user *arg); | |
1da177e4 | 69 | |
e8e54d3c JP |
70 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
71 | const struct net_device *dev, int strict); | |
c58da4c6 EK |
72 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
73 | const struct net_device *dev, int strict, | |
74 | u32 banned_flags); | |
bfeade08 | 75 | |
59fbb3a6 | 76 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 77 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 78 | #endif |
52eeeb84 | 79 | |
7df37ff3 CB |
80 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
81 | const unsigned int prefix_len, | |
82 | struct net_device *dev); | |
83 | ||
e8e54d3c JP |
84 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
85 | ||
86 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
87 | const struct in6_addr *addr, | |
88 | struct net_device *dev, int strict); | |
89 | ||
90 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
91 | const struct in6_addr *daddr, unsigned int srcprefs, | |
92 | struct in6_addr *saddr); | |
93 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
479840ff | 94 | u32 banned_flags); |
e8e54d3c | 95 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 96 | u32 banned_flags); |
fe38d2a1 | 97 | int inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
e32ea7e7 | 98 | bool match_wildcard); |
e8e54d3c JP |
99 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
100 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 101 | |
2ad3ed59 AA |
102 | void addrconf_add_linklocal(struct inet6_dev *idev, |
103 | const struct in6_addr *addr, u32 flags); | |
104 | ||
cc84b3c6 AA |
105 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
106 | const struct prefix_info *pinfo, | |
107 | struct inet6_dev *in6_dev, | |
108 | const struct in6_addr *addr, int addr_type, | |
109 | u32 addr_flags, bool sllao, bool tokenized, | |
110 | __u32 valid_lft, u32 prefered_lft); | |
111 | ||
4d6f2859 YS |
112 | static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr) |
113 | { | |
114 | memcpy(eui, addr, 3); | |
115 | eui[3] = 0xFF; | |
116 | eui[4] = 0xFE; | |
117 | memcpy(eui + 5, addr + 3, 3); | |
118 | } | |
119 | ||
120 | static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) | |
121 | { | |
122 | addrconf_addr_eui48_base(eui, addr); | |
123 | eui[0] ^= 2; | |
124 | } | |
125 | ||
399e6f95 MB |
126 | static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
127 | { | |
128 | if (dev->addr_len != ETH_ALEN) | |
129 | return -1; | |
399e6f95 MB |
130 | |
131 | /* | |
132 | * The zSeries OSA network cards can be shared among various | |
133 | * OS instances, but the OSA cards have only one MAC address. | |
134 | * This leads to duplicate address conflicts in conjunction | |
135 | * with IPv6 if more than one instance uses the same card. | |
136 | * | |
137 | * The driver for these cards can deliver a unique 16-bit | |
138 | * identifier for each instance sharing the same card. It is | |
139 | * placed instead of 0xFFFE in the interface identifier. The | |
140 | * "u" bit of the interface identifier is not inverted in this | |
141 | * case. Hence the resulting interface identifier has local | |
142 | * scope according to RFC2373. | |
143 | */ | |
4d6f2859 YS |
144 | |
145 | addrconf_addr_eui48_base(eui, dev->dev_addr); | |
146 | ||
399e6f95 MB |
147 | if (dev->dev_id) { |
148 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
149 | eui[4] = dev->dev_id & 0xFF; | |
150 | } else { | |
399e6f95 MB |
151 | eui[0] ^= 2; |
152 | } | |
4d6f2859 | 153 | |
399e6f95 MB |
154 | return 0; |
155 | } | |
156 | ||
4bed72e4 | 157 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 158 | unsigned int unit) |
4bed72e4 YH |
159 | { |
160 | if (timeout == 0xffffffff) | |
161 | return ~0UL; | |
162 | ||
163 | /* | |
164 | * Avoid arithmetic overflow. | |
165 | * Assuming unit is constant and non-zero, this "if" statement | |
166 | * will go away on 64bit archs. | |
167 | */ | |
168 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
169 | return LONG_MAX / unit; | |
170 | ||
171 | return timeout; | |
172 | } | |
173 | ||
174 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
175 | { | |
176 | return ~timeout; | |
177 | } | |
178 | ||
2a8cc6c8 YH |
179 | /* |
180 | * IPv6 Address Label subsystem (addrlabel.c) | |
181 | */ | |
e8e54d3c JP |
182 | int ipv6_addr_label_init(void); |
183 | void ipv6_addr_label_cleanup(void); | |
184 | void ipv6_addr_label_rtnl_register(void); | |
185 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
186 | int type, int ifindex); | |
2a8cc6c8 | 187 | |
1da177e4 LT |
188 | /* |
189 | * multicast prototypes (mcast.c) | |
190 | */ | |
e8e54d3c JP |
191 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
192 | const struct in6_addr *addr); | |
193 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
194 | const struct in6_addr *addr); | |
8651be8f | 195 | void __ipv6_sock_mc_close(struct sock *sk); |
e8e54d3c JP |
196 | void ipv6_sock_mc_close(struct sock *sk); |
197 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
198 | const struct in6_addr *src_addr); | |
199 | ||
200 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
201 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
202 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
203 | void ipv6_mc_up(struct inet6_dev *idev); | |
204 | void ipv6_mc_down(struct inet6_dev *idev); | |
205 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
206 | void ipv6_mc_remap(struct inet6_dev *idev); | |
207 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
208 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
9afd85c9 | 209 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
e8e54d3c JP |
210 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
211 | ||
212 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
213 | const struct in6_addr *src_addr); | |
214 | ||
215 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
216 | |
217 | /* A stub used by vxlan module. This is ugly, ideally these | |
218 | * symbols should be built into the core kernel. | |
219 | */ | |
220 | struct ipv6_stub { | |
221 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
222 | const struct in6_addr *addr); | |
223 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
224 | const struct in6_addr *addr); | |
343d60aa RP |
225 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
226 | struct dst_entry **dst, struct flowi6 *fl6); | |
5f81bd2e | 227 | void (*udpv6_encap_enable)(void); |
38cf595b | 228 | void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr, |
f564f45c CW |
229 | const struct in6_addr *solicited_addr, |
230 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 231 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
232 | }; |
233 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
234 | ||
daad1512 YH |
235 | /* |
236 | * identify MLD packets for MLD filter exceptions | |
237 | */ | |
238 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
239 | { | |
240 | struct icmp6hdr *hdr; | |
241 | ||
242 | if (nexthdr != IPPROTO_ICMPV6 || | |
243 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
244 | return false; | |
245 | ||
246 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
247 | ||
248 | switch (hdr->icmp6_type) { | |
249 | case ICMPV6_MGM_QUERY: | |
250 | case ICMPV6_MGM_REPORT: | |
251 | case ICMPV6_MGM_REDUCTION: | |
252 | case ICMPV6_MLD2_REPORT: | |
253 | return true; | |
254 | default: | |
255 | break; | |
256 | } | |
257 | return false; | |
258 | } | |
1da177e4 | 259 | |
e8e54d3c JP |
260 | void addrconf_prefix_rcv(struct net_device *dev, |
261 | u8 *opt, int len, bool sllao); | |
1da177e4 | 262 | |
1da177e4 LT |
263 | /* |
264 | * anycast prototypes (anycast.c) | |
265 | */ | |
e8e54d3c JP |
266 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
267 | const struct in6_addr *addr); | |
268 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
269 | const struct in6_addr *addr); | |
270 | void ipv6_sock_ac_close(struct sock *sk); | |
271 | ||
013b4d90 | 272 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
e8e54d3c | 273 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
381f4dca | 274 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
e8e54d3c | 275 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
7c90cc2d FLB |
276 | const struct in6_addr *addr); |
277 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, | |
278 | const struct in6_addr *addr); | |
1da177e4 LT |
279 | |
280 | /* Device notifier */ | |
e8e54d3c JP |
281 | int register_inet6addr_notifier(struct notifier_block *nb); |
282 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
283 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 284 | |
3ad7d246 KJ |
285 | int register_inet6addr_validator_notifier(struct notifier_block *nb); |
286 | int unregister_inet6addr_validator_notifier(struct notifier_block *nb); | |
287 | int inet6addr_validator_notifier_call_chain(unsigned long val, void *v); | |
288 | ||
85b3daad DA |
289 | void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
290 | int ifindex, struct ipv6_devconf *devconf); | |
d67b8c61 | 291 | |
48daa3bb ED |
292 | /** |
293 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
294 | * @dev: network device | |
295 | * | |
296 | * Caller must hold rcu_read_lock or RTNL, because this function | |
297 | * does not take a reference on the inet6_dev. | |
298 | */ | |
299 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 300 | { |
48daa3bb | 301 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
302 | } |
303 | ||
48daa3bb ED |
304 | /** |
305 | * in6_dev_get - get inet6_dev pointer from netdevice | |
306 | * @dev: network device | |
307 | * | |
308 | * This version can be used in any context, and takes a reference | |
309 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
310 | * release this reference. | |
311 | */ | |
312 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 313 | { |
48daa3bb ED |
314 | struct inet6_dev *idev; |
315 | ||
8814c4b5 | 316 | rcu_read_lock(); |
48daa3bb | 317 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 | 318 | if (idev) |
1be92460 | 319 | refcount_inc(&idev->refcnt); |
8814c4b5 | 320 | rcu_read_unlock(); |
1da177e4 LT |
321 | return idev; |
322 | } | |
323 | ||
bba24896 JP |
324 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
325 | { | |
326 | struct inet6_dev *idev = __in6_dev_get(dev); | |
327 | ||
328 | return idev ? idev->nd_parms : NULL; | |
329 | } | |
330 | ||
e8e54d3c | 331 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 332 | |
48daa3bb | 333 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 | 334 | { |
1be92460 | 335 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
336 | in6_dev_finish_destroy(idev); |
337 | } | |
338 | ||
48daa3bb ED |
339 | static inline void __in6_dev_put(struct inet6_dev *idev) |
340 | { | |
1be92460 | 341 | refcount_dec(&idev->refcnt); |
48daa3bb | 342 | } |
1da177e4 | 343 | |
48daa3bb ED |
344 | static inline void in6_dev_hold(struct inet6_dev *idev) |
345 | { | |
1be92460 | 346 | refcount_inc(&idev->refcnt); |
48daa3bb | 347 | } |
1da177e4 | 348 | |
e8e54d3c | 349 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
350 | |
351 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
352 | { | |
271201c0 | 353 | if (refcount_dec_and_test(&ifp->refcnt)) |
1da177e4 LT |
354 | inet6_ifa_finish_destroy(ifp); |
355 | } | |
356 | ||
48daa3bb ED |
357 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
358 | { | |
271201c0 | 359 | refcount_dec(&ifp->refcnt); |
48daa3bb | 360 | } |
1da177e4 | 361 | |
48daa3bb ED |
362 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
363 | { | |
271201c0 | 364 | refcount_inc(&ifp->refcnt); |
48daa3bb | 365 | } |
1da177e4 | 366 | |
1da177e4 LT |
367 | |
368 | /* | |
369 | * compute link-local solicited-node multicast address | |
370 | */ | |
371 | ||
372 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
373 | struct in6_addr *solicited) | |
374 | { | |
375 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
376 | htonl(0xFF020000), 0, |
377 | htonl(0x1), | |
378 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
379 | } |
380 | ||
b27b28cb | 381 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 382 | { |
d1641565 | 383 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 384 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
385 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
386 | #else | |
48daa3bb | 387 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 388 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 389 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 390 | #endif |
1da177e4 LT |
391 | } |
392 | ||
b27b28cb | 393 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 394 | { |
d1641565 | 395 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 396 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
397 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
398 | #else | |
48daa3bb | 399 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 400 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 401 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 402 | #endif |
1da177e4 LT |
403 | } |
404 | ||
b27b28cb | 405 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 406 | { |
48daa3bb | 407 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
408 | } |
409 | ||
ca97a644 YH |
410 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
411 | { | |
9d100774 | 412 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 413 | __be64 *p = (__be64 *)addr; |
9d100774 YH |
414 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
415 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
416 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
417 | #else | |
418 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
419 | addr->s6_addr32[1] | | |
420 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
421 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
422 | #endif | |
ca97a644 YH |
423 | } |
424 | ||
20380731 | 425 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
426 | int if6_proc_init(void); |
427 | void if6_proc_exit(void); | |
20380731 ACM |
428 | #endif |
429 | ||
1da177e4 | 430 | #endif |