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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 | ||
e6464b8c DA |
62 | struct ifa6_config { |
63 | const struct in6_addr *pfx; | |
64 | unsigned int plen; | |
65 | ||
66 | const struct in6_addr *peer_pfx; | |
67 | ||
8308f3ff | 68 | u32 rt_priority; |
e6464b8c DA |
69 | u32 ifa_flags; |
70 | u32 preferred_lft; | |
71 | u32 valid_lft; | |
72 | u16 scope; | |
73 | }; | |
74 | ||
e8e54d3c JP |
75 | int addrconf_init(void); |
76 | void addrconf_cleanup(void); | |
1da177e4 | 77 | |
e8e54d3c JP |
78 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
79 | int addrconf_del_ifaddr(struct net *net, void __user *arg); | |
80 | int addrconf_set_dstaddr(struct net *net, void __user *arg); | |
1da177e4 | 81 | |
e8e54d3c JP |
82 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
83 | const struct net_device *dev, int strict); | |
c58da4c6 | 84 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
232378e8 DA |
85 | const struct net_device *dev, bool skip_dev_check, |
86 | int strict, u32 banned_flags); | |
bfeade08 | 87 | |
59fbb3a6 | 88 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 89 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 90 | #endif |
52eeeb84 | 91 | |
7df37ff3 CB |
92 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
93 | const unsigned int prefix_len, | |
94 | struct net_device *dev); | |
95 | ||
e8e54d3c JP |
96 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
97 | ||
98 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
99 | const struct in6_addr *addr, | |
100 | struct net_device *dev, int strict); | |
101 | ||
102 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
103 | const struct in6_addr *daddr, unsigned int srcprefs, | |
104 | struct in6_addr *saddr); | |
105 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
479840ff | 106 | u32 banned_flags); |
e8e54d3c | 107 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 108 | u32 banned_flags); |
7016e062 JP |
109 | bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
110 | bool match_wildcard); | |
2dbb9b9e | 111 | bool inet_rcv_saddr_any(const struct sock *sk); |
e8e54d3c JP |
112 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
113 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 114 | |
2ad3ed59 AA |
115 | void addrconf_add_linklocal(struct inet6_dev *idev, |
116 | const struct in6_addr *addr, u32 flags); | |
117 | ||
cc84b3c6 AA |
118 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
119 | const struct prefix_info *pinfo, | |
120 | struct inet6_dev *in6_dev, | |
121 | const struct in6_addr *addr, int addr_type, | |
122 | u32 addr_flags, bool sllao, bool tokenized, | |
123 | __u32 valid_lft, u32 prefered_lft); | |
124 | ||
4d6f2859 YS |
125 | static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr) |
126 | { | |
127 | memcpy(eui, addr, 3); | |
128 | eui[3] = 0xFF; | |
129 | eui[4] = 0xFE; | |
130 | memcpy(eui + 5, addr + 3, 3); | |
131 | } | |
132 | ||
133 | static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) | |
134 | { | |
135 | addrconf_addr_eui48_base(eui, addr); | |
136 | eui[0] ^= 2; | |
137 | } | |
138 | ||
399e6f95 MB |
139 | static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
140 | { | |
141 | if (dev->addr_len != ETH_ALEN) | |
142 | return -1; | |
399e6f95 MB |
143 | |
144 | /* | |
145 | * The zSeries OSA network cards can be shared among various | |
146 | * OS instances, but the OSA cards have only one MAC address. | |
147 | * This leads to duplicate address conflicts in conjunction | |
148 | * with IPv6 if more than one instance uses the same card. | |
149 | * | |
150 | * The driver for these cards can deliver a unique 16-bit | |
151 | * identifier for each instance sharing the same card. It is | |
152 | * placed instead of 0xFFFE in the interface identifier. The | |
153 | * "u" bit of the interface identifier is not inverted in this | |
154 | * case. Hence the resulting interface identifier has local | |
155 | * scope according to RFC2373. | |
156 | */ | |
4d6f2859 YS |
157 | |
158 | addrconf_addr_eui48_base(eui, dev->dev_addr); | |
159 | ||
399e6f95 MB |
160 | if (dev->dev_id) { |
161 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
162 | eui[4] = dev->dev_id & 0xFF; | |
163 | } else { | |
399e6f95 MB |
164 | eui[0] ^= 2; |
165 | } | |
4d6f2859 | 166 | |
399e6f95 MB |
167 | return 0; |
168 | } | |
169 | ||
4bed72e4 | 170 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 171 | unsigned int unit) |
4bed72e4 YH |
172 | { |
173 | if (timeout == 0xffffffff) | |
174 | return ~0UL; | |
175 | ||
176 | /* | |
177 | * Avoid arithmetic overflow. | |
178 | * Assuming unit is constant and non-zero, this "if" statement | |
179 | * will go away on 64bit archs. | |
180 | */ | |
181 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
182 | return LONG_MAX / unit; | |
183 | ||
184 | return timeout; | |
185 | } | |
186 | ||
187 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
188 | { | |
189 | return ~timeout; | |
190 | } | |
191 | ||
2a8cc6c8 YH |
192 | /* |
193 | * IPv6 Address Label subsystem (addrlabel.c) | |
194 | */ | |
e8e54d3c JP |
195 | int ipv6_addr_label_init(void); |
196 | void ipv6_addr_label_cleanup(void); | |
a3fde2ad | 197 | int ipv6_addr_label_rtnl_register(void); |
e8e54d3c JP |
198 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, |
199 | int type, int ifindex); | |
2a8cc6c8 | 200 | |
1da177e4 LT |
201 | /* |
202 | * multicast prototypes (mcast.c) | |
203 | */ | |
e8e54d3c JP |
204 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
205 | const struct in6_addr *addr); | |
206 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
207 | const struct in6_addr *addr); | |
8651be8f | 208 | void __ipv6_sock_mc_close(struct sock *sk); |
e8e54d3c JP |
209 | void ipv6_sock_mc_close(struct sock *sk); |
210 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
211 | const struct in6_addr *src_addr); | |
212 | ||
213 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
214 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
215 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
216 | void ipv6_mc_up(struct inet6_dev *idev); | |
217 | void ipv6_mc_down(struct inet6_dev *idev); | |
218 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
219 | void ipv6_mc_remap(struct inet6_dev *idev); | |
220 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
221 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
9afd85c9 | 222 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
da13c59b | 223 | void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp); |
e8e54d3c JP |
224 | |
225 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
226 | const struct in6_addr *src_addr); | |
227 | ||
228 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
229 | |
230 | /* A stub used by vxlan module. This is ugly, ideally these | |
231 | * symbols should be built into the core kernel. | |
232 | */ | |
233 | struct ipv6_stub { | |
234 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
235 | const struct in6_addr *addr); | |
236 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
237 | const struct in6_addr *addr); | |
343d60aa RP |
238 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
239 | struct dst_entry **dst, struct flowi6 *fl6); | |
65a2022e DA |
240 | |
241 | struct fib6_table *(*fib6_get_table)(struct net *net, u32 id); | |
242 | struct fib6_info *(*fib6_lookup)(struct net *net, int oif, | |
243 | struct flowi6 *fl6, int flags); | |
244 | struct fib6_info *(*fib6_table_lookup)(struct net *net, | |
245 | struct fib6_table *table, | |
246 | int oif, struct flowi6 *fl6, | |
247 | int flags); | |
248 | struct fib6_info *(*fib6_multipath_select)(const struct net *net, | |
249 | struct fib6_info *f6i, | |
250 | struct flowi6 *fl6, int oif, | |
251 | const struct sk_buff *skb, | |
252 | int strict); | |
901731b8 DA |
253 | u32 (*ip6_mtu_from_fib6)(struct fib6_info *f6i, struct in6_addr *daddr, |
254 | struct in6_addr *saddr); | |
65a2022e | 255 | |
5f81bd2e | 256 | void (*udpv6_encap_enable)(void); |
38cf595b | 257 | void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr, |
f564f45c CW |
258 | const struct in6_addr *solicited_addr, |
259 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 260 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
261 | }; |
262 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
263 | ||
d74bad4e AI |
264 | /* A stub used by bpf helpers. Similarly ugly as ipv6_stub */ |
265 | struct ipv6_bpf_stub { | |
266 | int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len, | |
267 | bool force_bind_address_no_port, bool with_lock); | |
8a615c6b JS |
268 | struct sock *(*udp6_lib_lookup)(struct net *net, |
269 | const struct in6_addr *saddr, __be16 sport, | |
270 | const struct in6_addr *daddr, __be16 dport, | |
271 | int dif, int sdif, struct udp_table *tbl, | |
272 | struct sk_buff *skb); | |
d74bad4e AI |
273 | }; |
274 | extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly; | |
275 | ||
daad1512 YH |
276 | /* |
277 | * identify MLD packets for MLD filter exceptions | |
278 | */ | |
279 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
280 | { | |
281 | struct icmp6hdr *hdr; | |
282 | ||
283 | if (nexthdr != IPPROTO_ICMPV6 || | |
284 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
285 | return false; | |
286 | ||
287 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
288 | ||
289 | switch (hdr->icmp6_type) { | |
290 | case ICMPV6_MGM_QUERY: | |
291 | case ICMPV6_MGM_REPORT: | |
292 | case ICMPV6_MGM_REDUCTION: | |
293 | case ICMPV6_MLD2_REPORT: | |
294 | return true; | |
295 | default: | |
296 | break; | |
297 | } | |
298 | return false; | |
299 | } | |
1da177e4 | 300 | |
e8e54d3c JP |
301 | void addrconf_prefix_rcv(struct net_device *dev, |
302 | u8 *opt, int len, bool sllao); | |
1da177e4 | 303 | |
1da177e4 LT |
304 | /* |
305 | * anycast prototypes (anycast.c) | |
306 | */ | |
e8e54d3c JP |
307 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
308 | const struct in6_addr *addr); | |
309 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
310 | const struct in6_addr *addr); | |
311 | void ipv6_sock_ac_close(struct sock *sk); | |
312 | ||
013b4d90 | 313 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
e8e54d3c | 314 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
381f4dca | 315 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
e8e54d3c | 316 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
7c90cc2d FLB |
317 | const struct in6_addr *addr); |
318 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, | |
319 | const struct in6_addr *addr); | |
2384d025 JB |
320 | int ipv6_anycast_init(void); |
321 | void ipv6_anycast_cleanup(void); | |
1da177e4 LT |
322 | |
323 | /* Device notifier */ | |
e8e54d3c JP |
324 | int register_inet6addr_notifier(struct notifier_block *nb); |
325 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
326 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 327 | |
3ad7d246 KJ |
328 | int register_inet6addr_validator_notifier(struct notifier_block *nb); |
329 | int unregister_inet6addr_validator_notifier(struct notifier_block *nb); | |
330 | int inet6addr_validator_notifier_call_chain(unsigned long val, void *v); | |
331 | ||
85b3daad DA |
332 | void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
333 | int ifindex, struct ipv6_devconf *devconf); | |
d67b8c61 | 334 | |
48daa3bb ED |
335 | /** |
336 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
337 | * @dev: network device | |
338 | * | |
339 | * Caller must hold rcu_read_lock or RTNL, because this function | |
340 | * does not take a reference on the inet6_dev. | |
341 | */ | |
342 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 343 | { |
48daa3bb | 344 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
345 | } |
346 | ||
bdb7cc64 SS |
347 | /** |
348 | * __in6_dev_get_safely - get inet6_dev pointer from netdevice | |
349 | * @dev: network device | |
350 | * | |
351 | * This is a safer version of __in6_dev_get | |
352 | */ | |
353 | static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev) | |
354 | { | |
355 | if (likely(dev)) | |
356 | return rcu_dereference_rtnl(dev->ip6_ptr); | |
357 | else | |
358 | return NULL; | |
359 | } | |
360 | ||
48daa3bb ED |
361 | /** |
362 | * in6_dev_get - get inet6_dev pointer from netdevice | |
363 | * @dev: network device | |
364 | * | |
365 | * This version can be used in any context, and takes a reference | |
366 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
367 | * release this reference. | |
368 | */ | |
369 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 370 | { |
48daa3bb ED |
371 | struct inet6_dev *idev; |
372 | ||
8814c4b5 | 373 | rcu_read_lock(); |
48daa3bb | 374 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 | 375 | if (idev) |
1be92460 | 376 | refcount_inc(&idev->refcnt); |
8814c4b5 | 377 | rcu_read_unlock(); |
1da177e4 LT |
378 | return idev; |
379 | } | |
380 | ||
bba24896 JP |
381 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
382 | { | |
383 | struct inet6_dev *idev = __in6_dev_get(dev); | |
384 | ||
385 | return idev ? idev->nd_parms : NULL; | |
386 | } | |
387 | ||
e8e54d3c | 388 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 389 | |
48daa3bb | 390 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 | 391 | { |
1be92460 | 392 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
393 | in6_dev_finish_destroy(idev); |
394 | } | |
395 | ||
12d94a80 ED |
396 | static inline void in6_dev_put_clear(struct inet6_dev **pidev) |
397 | { | |
398 | struct inet6_dev *idev = *pidev; | |
399 | ||
400 | if (idev) { | |
401 | in6_dev_put(idev); | |
402 | *pidev = NULL; | |
403 | } | |
404 | } | |
405 | ||
48daa3bb ED |
406 | static inline void __in6_dev_put(struct inet6_dev *idev) |
407 | { | |
1be92460 | 408 | refcount_dec(&idev->refcnt); |
48daa3bb | 409 | } |
1da177e4 | 410 | |
48daa3bb ED |
411 | static inline void in6_dev_hold(struct inet6_dev *idev) |
412 | { | |
1be92460 | 413 | refcount_inc(&idev->refcnt); |
48daa3bb | 414 | } |
1da177e4 | 415 | |
e8e54d3c | 416 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
417 | |
418 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
419 | { | |
271201c0 | 420 | if (refcount_dec_and_test(&ifp->refcnt)) |
1da177e4 LT |
421 | inet6_ifa_finish_destroy(ifp); |
422 | } | |
423 | ||
48daa3bb ED |
424 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
425 | { | |
271201c0 | 426 | refcount_dec(&ifp->refcnt); |
48daa3bb | 427 | } |
1da177e4 | 428 | |
48daa3bb ED |
429 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
430 | { | |
271201c0 | 431 | refcount_inc(&ifp->refcnt); |
48daa3bb | 432 | } |
1da177e4 | 433 | |
1da177e4 LT |
434 | |
435 | /* | |
436 | * compute link-local solicited-node multicast address | |
437 | */ | |
438 | ||
439 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
440 | struct in6_addr *solicited) | |
441 | { | |
442 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
443 | htonl(0xFF020000), 0, |
444 | htonl(0x1), | |
445 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
446 | } |
447 | ||
b27b28cb | 448 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 449 | { |
d1641565 | 450 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 451 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
452 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
453 | #else | |
48daa3bb | 454 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 455 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 456 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 457 | #endif |
1da177e4 LT |
458 | } |
459 | ||
b27b28cb | 460 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 461 | { |
d1641565 | 462 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 463 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
464 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
465 | #else | |
48daa3bb | 466 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 467 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 468 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 469 | #endif |
1da177e4 LT |
470 | } |
471 | ||
b27b28cb | 472 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 473 | { |
48daa3bb | 474 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
475 | } |
476 | ||
ca97a644 YH |
477 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
478 | { | |
9d100774 | 479 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 480 | __be64 *p = (__be64 *)addr; |
9d100774 YH |
481 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
482 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
483 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
484 | #else | |
485 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
486 | addr->s6_addr32[1] | | |
487 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
488 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
489 | #endif | |
ca97a644 YH |
490 | } |
491 | ||
20380731 | 492 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
493 | int if6_proc_init(void); |
494 | void if6_proc_exit(void); | |
20380731 ACM |
495 | #endif |
496 | ||
1da177e4 | 497 | #endif |