Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _ADDRCONF_H |
3 | #define _ADDRCONF_H | |
4 | ||
bd11f074 | 5 | #define MAX_RTR_SOLICITATIONS -1 /* unlimited */ |
1da177e4 | 6 | #define RTR_SOLICITATION_INTERVAL (4*HZ) |
bd11f074 | 7 | #define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */ |
1da177e4 LT |
8 | |
9 | #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ | |
10 | ||
11 | #define TEMP_VALID_LIFETIME (7*86400) | |
12 | #define TEMP_PREFERRED_LIFETIME (86400) | |
76f793e3 | 13 | #define REGEN_MAX_RETRY (3) |
1da177e4 LT |
14 | #define MAX_DESYNC_FACTOR (600) |
15 | ||
16 | #define ADDR_CHECK_FREQUENCY (120*HZ) | |
17 | ||
18 | #define IPV6_MAX_ADDRESSES 16 | |
19 | ||
5c766d64 JP |
20 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
21 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) | |
22 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) | |
23 | ||
242d3a49 WC |
24 | #define ADDRCONF_NOTIFY_PRIORITY 0 |
25 | ||
c7dc89c0 | 26 | #include <linux/in.h> |
6a800d45 PM |
27 | #include <linux/in6.h> |
28 | ||
1da177e4 LT |
29 | struct prefix_info { |
30 | __u8 type; | |
31 | __u8 length; | |
32 | __u8 prefix_len; | |
33 | ||
34 | #if defined(__BIG_ENDIAN_BITFIELD) | |
35 | __u8 onlink : 1, | |
36 | autoconf : 1, | |
37 | reserved : 6; | |
38 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
39 | __u8 reserved : 6, | |
40 | autoconf : 1, | |
41 | onlink : 1; | |
42 | #else | |
43 | #error "Please fix <asm/byteorder.h>" | |
44 | #endif | |
e69a4adc AV |
45 | __be32 valid; |
46 | __be32 prefered; | |
47 | __be32 reserved2; | |
1da177e4 LT |
48 | |
49 | struct in6_addr prefix; | |
50 | }; | |
51 | ||
1da177e4 LT |
52 | #include <linux/netdevice.h> |
53 | #include <net/if_inet6.h> | |
e4553edd | 54 | #include <net/ipv6.h> |
1da177e4 | 55 | |
3ad7d246 KJ |
56 | struct in6_validator_info { |
57 | struct in6_addr i6vi_addr; | |
58 | struct inet6_dev *i6vi_dev; | |
de95e047 | 59 | struct netlink_ext_ack *extack; |
3ad7d246 KJ |
60 | }; |
61 | ||
e8e54d3c JP |
62 | int addrconf_init(void); |
63 | void addrconf_cleanup(void); | |
1da177e4 | 64 | |
e8e54d3c JP |
65 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
66 | int addrconf_del_ifaddr(struct net *net, void __user *arg); | |
67 | int addrconf_set_dstaddr(struct net *net, void __user *arg); | |
1da177e4 | 68 | |
e8e54d3c JP |
69 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
70 | const struct net_device *dev, int strict); | |
c58da4c6 EK |
71 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
72 | const struct net_device *dev, int strict, | |
73 | u32 banned_flags); | |
bfeade08 | 74 | |
59fbb3a6 | 75 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 76 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 77 | #endif |
52eeeb84 | 78 | |
7df37ff3 CB |
79 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
80 | const unsigned int prefix_len, | |
81 | struct net_device *dev); | |
82 | ||
e8e54d3c JP |
83 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
84 | ||
85 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
86 | const struct in6_addr *addr, | |
87 | struct net_device *dev, int strict); | |
88 | ||
89 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
90 | const struct in6_addr *daddr, unsigned int srcprefs, | |
91 | struct in6_addr *saddr); | |
92 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
479840ff | 93 | u32 banned_flags); |
e8e54d3c | 94 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 95 | u32 banned_flags); |
7016e062 JP |
96 | bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
97 | bool match_wildcard); | |
e8e54d3c JP |
98 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
99 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 100 | |
2ad3ed59 AA |
101 | void addrconf_add_linklocal(struct inet6_dev *idev, |
102 | const struct in6_addr *addr, u32 flags); | |
103 | ||
cc84b3c6 AA |
104 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
105 | const struct prefix_info *pinfo, | |
106 | struct inet6_dev *in6_dev, | |
107 | const struct in6_addr *addr, int addr_type, | |
108 | u32 addr_flags, bool sllao, bool tokenized, | |
109 | __u32 valid_lft, u32 prefered_lft); | |
110 | ||
4d6f2859 YS |
111 | static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr) |
112 | { | |
113 | memcpy(eui, addr, 3); | |
114 | eui[3] = 0xFF; | |
115 | eui[4] = 0xFE; | |
116 | memcpy(eui + 5, addr + 3, 3); | |
117 | } | |
118 | ||
119 | static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) | |
120 | { | |
121 | addrconf_addr_eui48_base(eui, addr); | |
122 | eui[0] ^= 2; | |
123 | } | |
124 | ||
399e6f95 MB |
125 | static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
126 | { | |
127 | if (dev->addr_len != ETH_ALEN) | |
128 | return -1; | |
399e6f95 MB |
129 | |
130 | /* | |
131 | * The zSeries OSA network cards can be shared among various | |
132 | * OS instances, but the OSA cards have only one MAC address. | |
133 | * This leads to duplicate address conflicts in conjunction | |
134 | * with IPv6 if more than one instance uses the same card. | |
135 | * | |
136 | * The driver for these cards can deliver a unique 16-bit | |
137 | * identifier for each instance sharing the same card. It is | |
138 | * placed instead of 0xFFFE in the interface identifier. The | |
139 | * "u" bit of the interface identifier is not inverted in this | |
140 | * case. Hence the resulting interface identifier has local | |
141 | * scope according to RFC2373. | |
142 | */ | |
4d6f2859 YS |
143 | |
144 | addrconf_addr_eui48_base(eui, dev->dev_addr); | |
145 | ||
399e6f95 MB |
146 | if (dev->dev_id) { |
147 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
148 | eui[4] = dev->dev_id & 0xFF; | |
149 | } else { | |
399e6f95 MB |
150 | eui[0] ^= 2; |
151 | } | |
4d6f2859 | 152 | |
399e6f95 MB |
153 | return 0; |
154 | } | |
155 | ||
4bed72e4 | 156 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 157 | unsigned int unit) |
4bed72e4 YH |
158 | { |
159 | if (timeout == 0xffffffff) | |
160 | return ~0UL; | |
161 | ||
162 | /* | |
163 | * Avoid arithmetic overflow. | |
164 | * Assuming unit is constant and non-zero, this "if" statement | |
165 | * will go away on 64bit archs. | |
166 | */ | |
167 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
168 | return LONG_MAX / unit; | |
169 | ||
170 | return timeout; | |
171 | } | |
172 | ||
173 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
174 | { | |
175 | return ~timeout; | |
176 | } | |
177 | ||
2a8cc6c8 YH |
178 | /* |
179 | * IPv6 Address Label subsystem (addrlabel.c) | |
180 | */ | |
e8e54d3c JP |
181 | int ipv6_addr_label_init(void); |
182 | void ipv6_addr_label_cleanup(void); | |
183 | void ipv6_addr_label_rtnl_register(void); | |
184 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
185 | int type, int ifindex); | |
2a8cc6c8 | 186 | |
1da177e4 LT |
187 | /* |
188 | * multicast prototypes (mcast.c) | |
189 | */ | |
e8e54d3c JP |
190 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
191 | const struct in6_addr *addr); | |
192 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
193 | const struct in6_addr *addr); | |
8651be8f | 194 | void __ipv6_sock_mc_close(struct sock *sk); |
e8e54d3c JP |
195 | void ipv6_sock_mc_close(struct sock *sk); |
196 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
197 | const struct in6_addr *src_addr); | |
198 | ||
199 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
200 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
201 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
202 | void ipv6_mc_up(struct inet6_dev *idev); | |
203 | void ipv6_mc_down(struct inet6_dev *idev); | |
204 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
205 | void ipv6_mc_remap(struct inet6_dev *idev); | |
206 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
207 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
9afd85c9 | 208 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
da13c59b | 209 | void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp); |
e8e54d3c JP |
210 | |
211 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
212 | const struct in6_addr *src_addr); | |
213 | ||
214 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
215 | |
216 | /* A stub used by vxlan module. This is ugly, ideally these | |
217 | * symbols should be built into the core kernel. | |
218 | */ | |
219 | struct ipv6_stub { | |
220 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
221 | const struct in6_addr *addr); | |
222 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
223 | const struct in6_addr *addr); | |
343d60aa RP |
224 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
225 | struct dst_entry **dst, struct flowi6 *fl6); | |
5f81bd2e | 226 | void (*udpv6_encap_enable)(void); |
38cf595b | 227 | void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr, |
f564f45c CW |
228 | const struct in6_addr *solicited_addr, |
229 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 230 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
231 | }; |
232 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
233 | ||
daad1512 YH |
234 | /* |
235 | * identify MLD packets for MLD filter exceptions | |
236 | */ | |
237 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
238 | { | |
239 | struct icmp6hdr *hdr; | |
240 | ||
241 | if (nexthdr != IPPROTO_ICMPV6 || | |
242 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
243 | return false; | |
244 | ||
245 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
246 | ||
247 | switch (hdr->icmp6_type) { | |
248 | case ICMPV6_MGM_QUERY: | |
249 | case ICMPV6_MGM_REPORT: | |
250 | case ICMPV6_MGM_REDUCTION: | |
251 | case ICMPV6_MLD2_REPORT: | |
252 | return true; | |
253 | default: | |
254 | break; | |
255 | } | |
256 | return false; | |
257 | } | |
1da177e4 | 258 | |
e8e54d3c JP |
259 | void addrconf_prefix_rcv(struct net_device *dev, |
260 | u8 *opt, int len, bool sllao); | |
1da177e4 | 261 | |
1da177e4 LT |
262 | /* |
263 | * anycast prototypes (anycast.c) | |
264 | */ | |
e8e54d3c JP |
265 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
266 | const struct in6_addr *addr); | |
267 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
268 | const struct in6_addr *addr); | |
269 | void ipv6_sock_ac_close(struct sock *sk); | |
270 | ||
013b4d90 | 271 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
e8e54d3c | 272 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
381f4dca | 273 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
e8e54d3c | 274 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
7c90cc2d FLB |
275 | const struct in6_addr *addr); |
276 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, | |
277 | const struct in6_addr *addr); | |
1da177e4 LT |
278 | |
279 | /* Device notifier */ | |
e8e54d3c JP |
280 | int register_inet6addr_notifier(struct notifier_block *nb); |
281 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
282 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 283 | |
3ad7d246 KJ |
284 | int register_inet6addr_validator_notifier(struct notifier_block *nb); |
285 | int unregister_inet6addr_validator_notifier(struct notifier_block *nb); | |
286 | int inet6addr_validator_notifier_call_chain(unsigned long val, void *v); | |
287 | ||
85b3daad DA |
288 | void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
289 | int ifindex, struct ipv6_devconf *devconf); | |
d67b8c61 | 290 | |
48daa3bb ED |
291 | /** |
292 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
293 | * @dev: network device | |
294 | * | |
295 | * Caller must hold rcu_read_lock or RTNL, because this function | |
296 | * does not take a reference on the inet6_dev. | |
297 | */ | |
298 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 299 | { |
48daa3bb | 300 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
301 | } |
302 | ||
48daa3bb ED |
303 | /** |
304 | * in6_dev_get - get inet6_dev pointer from netdevice | |
305 | * @dev: network device | |
306 | * | |
307 | * This version can be used in any context, and takes a reference | |
308 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
309 | * release this reference. | |
310 | */ | |
311 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 312 | { |
48daa3bb ED |
313 | struct inet6_dev *idev; |
314 | ||
8814c4b5 | 315 | rcu_read_lock(); |
48daa3bb | 316 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 | 317 | if (idev) |
1be92460 | 318 | refcount_inc(&idev->refcnt); |
8814c4b5 | 319 | rcu_read_unlock(); |
1da177e4 LT |
320 | return idev; |
321 | } | |
322 | ||
bba24896 JP |
323 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
324 | { | |
325 | struct inet6_dev *idev = __in6_dev_get(dev); | |
326 | ||
327 | return idev ? idev->nd_parms : NULL; | |
328 | } | |
329 | ||
e8e54d3c | 330 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 331 | |
48daa3bb | 332 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 | 333 | { |
1be92460 | 334 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
335 | in6_dev_finish_destroy(idev); |
336 | } | |
337 | ||
12d94a80 ED |
338 | static inline void in6_dev_put_clear(struct inet6_dev **pidev) |
339 | { | |
340 | struct inet6_dev *idev = *pidev; | |
341 | ||
342 | if (idev) { | |
343 | in6_dev_put(idev); | |
344 | *pidev = NULL; | |
345 | } | |
346 | } | |
347 | ||
48daa3bb ED |
348 | static inline void __in6_dev_put(struct inet6_dev *idev) |
349 | { | |
1be92460 | 350 | refcount_dec(&idev->refcnt); |
48daa3bb | 351 | } |
1da177e4 | 352 | |
48daa3bb ED |
353 | static inline void in6_dev_hold(struct inet6_dev *idev) |
354 | { | |
1be92460 | 355 | refcount_inc(&idev->refcnt); |
48daa3bb | 356 | } |
1da177e4 | 357 | |
e8e54d3c | 358 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
359 | |
360 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
361 | { | |
271201c0 | 362 | if (refcount_dec_and_test(&ifp->refcnt)) |
1da177e4 LT |
363 | inet6_ifa_finish_destroy(ifp); |
364 | } | |
365 | ||
48daa3bb ED |
366 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
367 | { | |
271201c0 | 368 | refcount_dec(&ifp->refcnt); |
48daa3bb | 369 | } |
1da177e4 | 370 | |
48daa3bb ED |
371 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
372 | { | |
271201c0 | 373 | refcount_inc(&ifp->refcnt); |
48daa3bb | 374 | } |
1da177e4 | 375 | |
1da177e4 LT |
376 | |
377 | /* | |
378 | * compute link-local solicited-node multicast address | |
379 | */ | |
380 | ||
381 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
382 | struct in6_addr *solicited) | |
383 | { | |
384 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
385 | htonl(0xFF020000), 0, |
386 | htonl(0x1), | |
387 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
388 | } |
389 | ||
b27b28cb | 390 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 391 | { |
d1641565 | 392 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 393 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
394 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
395 | #else | |
48daa3bb | 396 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 397 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 398 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 399 | #endif |
1da177e4 LT |
400 | } |
401 | ||
b27b28cb | 402 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 403 | { |
d1641565 | 404 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 405 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
406 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
407 | #else | |
48daa3bb | 408 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 409 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 410 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 411 | #endif |
1da177e4 LT |
412 | } |
413 | ||
b27b28cb | 414 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 415 | { |
48daa3bb | 416 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
417 | } |
418 | ||
ca97a644 YH |
419 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
420 | { | |
9d100774 | 421 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 422 | __be64 *p = (__be64 *)addr; |
9d100774 YH |
423 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
424 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
425 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
426 | #else | |
427 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
428 | addr->s6_addr32[1] | | |
429 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
430 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
431 | #endif | |
ca97a644 YH |
432 | } |
433 | ||
20380731 | 434 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
435 | int if6_proc_init(void); |
436 | void if6_proc_exit(void); | |
20380731 ACM |
437 | #endif |
438 | ||
1da177e4 | 439 | #endif |