Commit | Line | Data |
---|---|---|
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); |
a583636a CG |
90 | int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
91 | bool match_wildcard); | |
e32ea7e7 CG |
92 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
93 | bool match_wildcard); | |
e8e54d3c JP |
94 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
95 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 96 | |
399e6f95 MB |
97 | static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
98 | { | |
99 | if (dev->addr_len != ETH_ALEN) | |
100 | return -1; | |
101 | memcpy(eui, dev->dev_addr, 3); | |
102 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
103 | ||
104 | /* | |
105 | * The zSeries OSA network cards can be shared among various | |
106 | * OS instances, but the OSA cards have only one MAC address. | |
107 | * This leads to duplicate address conflicts in conjunction | |
108 | * with IPv6 if more than one instance uses the same card. | |
109 | * | |
110 | * The driver for these cards can deliver a unique 16-bit | |
111 | * identifier for each instance sharing the same card. It is | |
112 | * placed instead of 0xFFFE in the interface identifier. The | |
113 | * "u" bit of the interface identifier is not inverted in this | |
114 | * case. Hence the resulting interface identifier has local | |
115 | * scope according to RFC2373. | |
116 | */ | |
117 | if (dev->dev_id) { | |
118 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
119 | eui[4] = dev->dev_id & 0xFF; | |
120 | } else { | |
121 | eui[3] = 0xFF; | |
122 | eui[4] = 0xFE; | |
123 | eui[0] ^= 2; | |
124 | } | |
125 | return 0; | |
126 | } | |
127 | ||
4bed72e4 | 128 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 129 | unsigned int unit) |
4bed72e4 YH |
130 | { |
131 | if (timeout == 0xffffffff) | |
132 | return ~0UL; | |
133 | ||
134 | /* | |
135 | * Avoid arithmetic overflow. | |
136 | * Assuming unit is constant and non-zero, this "if" statement | |
137 | * will go away on 64bit archs. | |
138 | */ | |
139 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
140 | return LONG_MAX / unit; | |
141 | ||
142 | return timeout; | |
143 | } | |
144 | ||
145 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
146 | { | |
147 | return ~timeout; | |
148 | } | |
149 | ||
2a8cc6c8 YH |
150 | /* |
151 | * IPv6 Address Label subsystem (addrlabel.c) | |
152 | */ | |
e8e54d3c JP |
153 | int ipv6_addr_label_init(void); |
154 | void ipv6_addr_label_cleanup(void); | |
155 | void ipv6_addr_label_rtnl_register(void); | |
156 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
157 | int type, int ifindex); | |
2a8cc6c8 | 158 | |
1da177e4 LT |
159 | /* |
160 | * multicast prototypes (mcast.c) | |
161 | */ | |
e8e54d3c JP |
162 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
163 | const struct in6_addr *addr); | |
164 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
165 | const struct in6_addr *addr); | |
166 | void ipv6_sock_mc_close(struct sock *sk); | |
167 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
168 | const struct in6_addr *src_addr); | |
169 | ||
170 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
171 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
172 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
173 | void ipv6_mc_up(struct inet6_dev *idev); | |
174 | void ipv6_mc_down(struct inet6_dev *idev); | |
175 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
176 | void ipv6_mc_remap(struct inet6_dev *idev); | |
177 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
178 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
9afd85c9 | 179 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
e8e54d3c JP |
180 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
181 | ||
182 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
183 | const struct in6_addr *src_addr); | |
184 | ||
185 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
186 | |
187 | /* A stub used by vxlan module. This is ugly, ideally these | |
188 | * symbols should be built into the core kernel. | |
189 | */ | |
190 | struct ipv6_stub { | |
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); | |
343d60aa RP |
195 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
196 | struct dst_entry **dst, struct flowi6 *fl6); | |
5f81bd2e | 197 | void (*udpv6_encap_enable)(void); |
38cf595b | 198 | void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr, |
f564f45c CW |
199 | const struct in6_addr *solicited_addr, |
200 | bool router, bool solicited, bool override, bool inc_opt); | |
e15a00aa | 201 | struct neigh_table *nd_tbl; |
5f81bd2e CW |
202 | }; |
203 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
204 | ||
daad1512 YH |
205 | /* |
206 | * identify MLD packets for MLD filter exceptions | |
207 | */ | |
208 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
209 | { | |
210 | struct icmp6hdr *hdr; | |
211 | ||
212 | if (nexthdr != IPPROTO_ICMPV6 || | |
213 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
214 | return false; | |
215 | ||
216 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
217 | ||
218 | switch (hdr->icmp6_type) { | |
219 | case ICMPV6_MGM_QUERY: | |
220 | case ICMPV6_MGM_REPORT: | |
221 | case ICMPV6_MGM_REDUCTION: | |
222 | case ICMPV6_MLD2_REPORT: | |
223 | return true; | |
224 | default: | |
225 | break; | |
226 | } | |
227 | return false; | |
228 | } | |
1da177e4 | 229 | |
e8e54d3c JP |
230 | void addrconf_prefix_rcv(struct net_device *dev, |
231 | u8 *opt, int len, bool sllao); | |
1da177e4 | 232 | |
1da177e4 LT |
233 | /* |
234 | * anycast prototypes (anycast.c) | |
235 | */ | |
e8e54d3c JP |
236 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
237 | const struct in6_addr *addr); | |
238 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
239 | const struct in6_addr *addr); | |
240 | void ipv6_sock_ac_close(struct sock *sk); | |
241 | ||
013b4d90 | 242 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
e8e54d3c | 243 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
381f4dca | 244 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
e8e54d3c | 245 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
7c90cc2d FLB |
246 | const struct in6_addr *addr); |
247 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, | |
248 | const struct in6_addr *addr); | |
1da177e4 LT |
249 | |
250 | /* Device notifier */ | |
e8e54d3c JP |
251 | int register_inet6addr_notifier(struct notifier_block *nb); |
252 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
253 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 254 | |
e8e54d3c JP |
255 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
256 | struct ipv6_devconf *devconf); | |
d67b8c61 | 257 | |
48daa3bb ED |
258 | /** |
259 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
260 | * @dev: network device | |
261 | * | |
262 | * Caller must hold rcu_read_lock or RTNL, because this function | |
263 | * does not take a reference on the inet6_dev. | |
264 | */ | |
265 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 266 | { |
48daa3bb | 267 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
268 | } |
269 | ||
48daa3bb ED |
270 | /** |
271 | * in6_dev_get - get inet6_dev pointer from netdevice | |
272 | * @dev: network device | |
273 | * | |
274 | * This version can be used in any context, and takes a reference | |
275 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
276 | * release this reference. | |
277 | */ | |
278 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 279 | { |
48daa3bb ED |
280 | struct inet6_dev *idev; |
281 | ||
8814c4b5 | 282 | rcu_read_lock(); |
48daa3bb | 283 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 LT |
284 | if (idev) |
285 | atomic_inc(&idev->refcnt); | |
8814c4b5 | 286 | rcu_read_unlock(); |
1da177e4 LT |
287 | return idev; |
288 | } | |
289 | ||
bba24896 JP |
290 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
291 | { | |
292 | struct inet6_dev *idev = __in6_dev_get(dev); | |
293 | ||
294 | return idev ? idev->nd_parms : NULL; | |
295 | } | |
296 | ||
e8e54d3c | 297 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 298 | |
48daa3bb | 299 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 LT |
300 | { |
301 | if (atomic_dec_and_test(&idev->refcnt)) | |
302 | in6_dev_finish_destroy(idev); | |
303 | } | |
304 | ||
48daa3bb ED |
305 | static inline void __in6_dev_put(struct inet6_dev *idev) |
306 | { | |
307 | atomic_dec(&idev->refcnt); | |
308 | } | |
1da177e4 | 309 | |
48daa3bb ED |
310 | static inline void in6_dev_hold(struct inet6_dev *idev) |
311 | { | |
312 | atomic_inc(&idev->refcnt); | |
313 | } | |
1da177e4 | 314 | |
e8e54d3c | 315 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
316 | |
317 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
318 | { | |
319 | if (atomic_dec_and_test(&ifp->refcnt)) | |
320 | inet6_ifa_finish_destroy(ifp); | |
321 | } | |
322 | ||
48daa3bb ED |
323 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
324 | { | |
325 | atomic_dec(&ifp->refcnt); | |
326 | } | |
1da177e4 | 327 | |
48daa3bb ED |
328 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
329 | { | |
330 | atomic_inc(&ifp->refcnt); | |
331 | } | |
1da177e4 | 332 | |
1da177e4 LT |
333 | |
334 | /* | |
335 | * compute link-local solicited-node multicast address | |
336 | */ | |
337 | ||
338 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
339 | struct in6_addr *solicited) | |
340 | { | |
341 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
342 | htonl(0xFF020000), 0, |
343 | htonl(0x1), | |
344 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
345 | } |
346 | ||
b27b28cb | 347 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 348 | { |
d1641565 | 349 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 350 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
351 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
352 | #else | |
48daa3bb | 353 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 354 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 355 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 356 | #endif |
1da177e4 LT |
357 | } |
358 | ||
b27b28cb | 359 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 360 | { |
d1641565 | 361 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 362 | __be64 *p = (__be64 *)addr; |
d1641565 YH |
363 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
364 | #else | |
48daa3bb | 365 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 366 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 367 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 368 | #endif |
1da177e4 LT |
369 | } |
370 | ||
b27b28cb | 371 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 372 | { |
48daa3bb | 373 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
374 | } |
375 | ||
ca97a644 YH |
376 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
377 | { | |
9d100774 | 378 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
bc861959 | 379 | __be64 *p = (__be64 *)addr; |
9d100774 YH |
380 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
381 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
382 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
383 | #else | |
384 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
385 | addr->s6_addr32[1] | | |
386 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
387 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
388 | #endif | |
ca97a644 YH |
389 | } |
390 | ||
20380731 | 391 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
392 | int if6_proc_init(void); |
393 | void if6_proc_exit(void); | |
20380731 ACM |
394 | #endif |
395 | ||
1da177e4 | 396 | #endif |