Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * | |
4 | * Authors: | |
5 | * Pedro Roque <roque@di.fc.ul.pt> | |
6 | * | |
1da177e4 LT |
7 | * This program is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #ifndef _NET_IPV6_H | |
14 | #define _NET_IPV6_H | |
15 | ||
16 | #include <linux/ipv6.h> | |
17 | #include <linux/hardirq.h> | |
08dcdbf6 | 18 | #include <linux/jhash.h> |
20283d84 | 19 | #include <net/if_inet6.h> |
1da177e4 LT |
20 | #include <net/ndisc.h> |
21 | #include <net/flow.h> | |
22 | #include <net/snmp.h> | |
23 | ||
24 | #define SIN6_LEN_RFC2133 24 | |
25 | ||
26 | #define IPV6_MAXPLEN 65535 | |
27 | ||
28 | /* | |
29 | * NextHeader field of IPv6 header | |
30 | */ | |
31 | ||
32 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ | |
33 | #define NEXTHDR_TCP 6 /* TCP segment. */ | |
34 | #define NEXTHDR_UDP 17 /* UDP message. */ | |
35 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ | |
36 | #define NEXTHDR_ROUTING 43 /* Routing header. */ | |
37 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ | |
c12b395a | 38 | #define NEXTHDR_GRE 47 /* GRE header. */ |
1da177e4 LT |
39 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
40 | #define NEXTHDR_AUTH 51 /* Authentication header. */ | |
41 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ | |
42 | #define NEXTHDR_NONE 59 /* No next header */ | |
43 | #define NEXTHDR_DEST 60 /* Destination options header. */ | |
2b741653 | 44 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
1da177e4 LT |
45 | |
46 | #define NEXTHDR_MAX 255 | |
47 | ||
48 | ||
49 | ||
50 | #define IPV6_DEFAULT_HOPLIMIT 64 | |
51 | #define IPV6_DEFAULT_MCASTHOPS 1 | |
52 | ||
53 | /* | |
54 | * Addr type | |
55 | * | |
56 | * type - unicast | multicast | |
57 | * scope - local | site | global | |
58 | * v4 - compat | |
59 | * v4mapped | |
60 | * any | |
61 | * loopback | |
62 | */ | |
63 | ||
64 | #define IPV6_ADDR_ANY 0x0000U | |
65 | ||
66 | #define IPV6_ADDR_UNICAST 0x0001U | |
67 | #define IPV6_ADDR_MULTICAST 0x0002U | |
68 | ||
69 | #define IPV6_ADDR_LOOPBACK 0x0010U | |
70 | #define IPV6_ADDR_LINKLOCAL 0x0020U | |
71 | #define IPV6_ADDR_SITELOCAL 0x0040U | |
72 | ||
73 | #define IPV6_ADDR_COMPATv4 0x0080U | |
74 | ||
75 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U | |
76 | ||
77 | #define IPV6_ADDR_MAPPED 0x1000U | |
1da177e4 LT |
78 | |
79 | /* | |
80 | * Addr scopes | |
81 | */ | |
1da177e4 LT |
82 | #define IPV6_ADDR_MC_SCOPE(a) \ |
83 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ | |
84 | #define __IPV6_ADDR_SCOPE_INVALID -1 | |
1da177e4 LT |
85 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
86 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 | |
87 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 | |
88 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 | |
89 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e | |
90 | ||
5ced1339 LL |
91 | /* |
92 | * Addr flags | |
93 | */ | |
5ced1339 LL |
94 | #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ |
95 | ((a)->s6_addr[1] & 0x10) | |
96 | #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ | |
97 | ((a)->s6_addr[1] & 0x20) | |
98 | #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ | |
99 | ((a)->s6_addr[1] & 0x40) | |
5ced1339 | 100 | |
1da177e4 LT |
101 | /* |
102 | * fragmentation header | |
103 | */ | |
104 | ||
105 | struct frag_hdr { | |
44473a6b AV |
106 | __u8 nexthdr; |
107 | __u8 reserved; | |
108 | __be16 frag_off; | |
109 | __be32 identification; | |
1da177e4 LT |
110 | }; |
111 | ||
112 | #define IP6_MF 0x0001 | |
113 | ||
1da177e4 LT |
114 | #include <net/sock.h> |
115 | ||
116 | /* sysctls */ | |
1da177e4 | 117 | extern int sysctl_mld_max_msf; |
3d7cc2ba | 118 | |
087fe240 | 119 | #define _DEVINC(net, statname, modifier, idev, field) \ |
14878f75 | 120 | ({ \ |
a11d206d YH |
121 | struct inet6_dev *_idev = (idev); \ |
122 | if (likely(_idev != NULL)) \ | |
14878f75 | 123 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
9261e537 | 124 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
a11d206d | 125 | }) |
14878f75 | 126 | |
be281e55 ED |
127 | /* per device counters are atomic_long_t */ |
128 | #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ | |
129 | ({ \ | |
130 | struct inet6_dev *_idev = (idev); \ | |
131 | if (likely(_idev != NULL)) \ | |
132 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
133 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ | |
134 | }) | |
135 | ||
2a24444f ED |
136 | /* per device and per net counters are atomic_long_t */ |
137 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
138 | ({ \ | |
139 | struct inet6_dev *_idev = (idev); \ | |
140 | if (likely(_idev != NULL)) \ | |
141 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
142 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
143 | }) | |
144 | ||
087fe240 | 145 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
8e7999c4 PE |
146 | ({ \ |
147 | struct inet6_dev *_idev = (idev); \ | |
148 | if (likely(_idev != NULL)) \ | |
149 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ | |
9261e537 | 150 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
8e7999c4 PE |
151 | }) |
152 | ||
edf391ff NH |
153 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
154 | ({ \ | |
155 | struct inet6_dev *_idev = (idev); \ | |
156 | if (likely(_idev != NULL)) \ | |
157 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ | |
158 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ | |
159 | }) | |
160 | ||
14878f75 | 161 | /* MIBs */ |
14878f75 | 162 | |
087fe240 | 163 | #define IP6_INC_STATS(net, idev,field) \ |
4ce3c183 | 164 | _DEVINC(net, ipv6, 64, idev, field) |
087fe240 | 165 | #define IP6_INC_STATS_BH(net, idev,field) \ |
4ce3c183 | 166 | _DEVINC(net, ipv6, 64_BH, idev, field) |
edf391ff | 167 | #define IP6_ADD_STATS(net, idev,field,val) \ |
4ce3c183 | 168 | _DEVADD(net, ipv6, 64, idev, field, val) |
087fe240 | 169 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 170 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
edf391ff | 171 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
4ce3c183 | 172 | _DEVUPD(net, ipv6, 64, idev, field, val) |
edf391ff | 173 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 174 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
087fe240 | 175 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 176 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
087fe240 | 177 | #define ICMP6_INC_STATS_BH(net, idev, field) \ |
be281e55 | 178 | _DEVINCATOMIC(net, icmpv6, _BH, idev, field) |
087fe240 DL |
179 | |
180 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 181 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 182 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ |
2a24444f | 183 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 184 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ |
2a24444f | 185 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 186 | |
fd2c3ef7 | 187 | struct ip6_ra_chain { |
1da177e4 LT |
188 | struct ip6_ra_chain *next; |
189 | struct sock *sk; | |
190 | int sel; | |
191 | void (*destructor)(struct sock *); | |
192 | }; | |
193 | ||
194 | extern struct ip6_ra_chain *ip6_ra_chain; | |
195 | extern rwlock_t ip6_ra_lock; | |
196 | ||
197 | /* | |
198 | This structure is prepared by protocol, when parsing | |
199 | ancillary data and passed to IPv6. | |
200 | */ | |
201 | ||
fd2c3ef7 | 202 | struct ipv6_txoptions { |
1da177e4 LT |
203 | /* Length of this structure */ |
204 | int tot_len; | |
205 | ||
206 | /* length of extension headers */ | |
207 | ||
208 | __u16 opt_flen; /* after fragment hdr */ | |
209 | __u16 opt_nflen; /* before fragment hdr */ | |
210 | ||
211 | struct ipv6_opt_hdr *hopopt; | |
212 | struct ipv6_opt_hdr *dst0opt; | |
213 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 LT |
214 | struct ipv6_opt_hdr *dst1opt; |
215 | ||
216 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ | |
217 | }; | |
218 | ||
fd2c3ef7 | 219 | struct ip6_flowlabel { |
7f0e44ac | 220 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 221 | __be32 label; |
db3459d1 | 222 | atomic_t users; |
1da177e4 LT |
223 | struct in6_addr dst; |
224 | struct ipv6_txoptions *opt; | |
1da177e4 | 225 | unsigned long linger; |
d3aedd5e | 226 | struct rcu_head rcu; |
1da177e4 | 227 | u8 share; |
4f82f457 EB |
228 | union { |
229 | struct pid *pid; | |
230 | kuid_t uid; | |
231 | } owner; | |
1da177e4 LT |
232 | unsigned long lastuse; |
233 | unsigned long expires; | |
60e8fbc4 | 234 | struct net *fl_net; |
1da177e4 LT |
235 | }; |
236 | ||
f3a7c66b HH |
237 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
238 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
1da177e4 | 239 | |
fd2c3ef7 | 240 | struct ipv6_fl_socklist { |
7f0e44ac ED |
241 | struct ipv6_fl_socklist __rcu *next; |
242 | struct ip6_flowlabel *fl; | |
243 | struct rcu_head rcu; | |
1da177e4 LT |
244 | }; |
245 | ||
90bcaf7b | 246 | extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
1da177e4 LT |
247 | extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
248 | struct ip6_flowlabel * fl, | |
249 | struct ipv6_txoptions * fopt); | |
250 | extern void fl6_free_socklist(struct sock *sk); | |
251 | extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
0a3e78ac | 252 | extern int ip6_flowlabel_init(void); |
1da177e4 LT |
253 | extern void ip6_flowlabel_cleanup(void); |
254 | ||
255 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
256 | { | |
257 | if (fl) | |
258 | atomic_dec(&fl->users); | |
259 | } | |
260 | ||
b94f1c09 DM |
261 | extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
262 | ||
6d0bfe22 LC |
263 | int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
264 | struct icmp6hdr *thdr, int len); | |
265 | ||
266 | struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb, | |
267 | struct sock *sk, struct flowi6 *fl6); | |
268 | ||
725a8ff0 | 269 | extern int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 270 | |
e5bbef20 | 271 | extern int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 LT |
272 | |
273 | extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); | |
333fad53 YH |
274 | extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
275 | int newtype, | |
276 | struct ipv6_opt_hdr __user *newopt, | |
277 | int newoptlen); | |
df9890c3 YH |
278 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
279 | struct ipv6_txoptions *opt); | |
1da177e4 | 280 | |
92113bfd | 281 | extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb); |
399c07de | 282 | |
aeaf6e9d SL |
283 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
284 | { | |
285 | /* If forwarding is enabled, RA are not accepted unless the special | |
286 | * hybrid mode (accept_ra=2) is enabled. | |
287 | */ | |
288 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
289 | idev->cnf.accept_ra; | |
290 | } | |
291 | ||
d4915c08 AW |
292 | #if IS_ENABLED(CONFIG_IPV6) |
293 | static inline int ip6_frag_nqueues(struct net *net) | |
294 | { | |
295 | return net->ipv6.frags.nqueues; | |
296 | } | |
297 | ||
298 | static inline int ip6_frag_mem(struct net *net) | |
299 | { | |
d433673e | 300 | return sum_frag_mem_limit(&net->ipv6.frags); |
d4915c08 AW |
301 | } |
302 | #endif | |
1da177e4 | 303 | |
c2a93660 JDB |
304 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
305 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 306 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 307 | |
b1cacb68 YH |
308 | extern int __ipv6_addr_type(const struct in6_addr *addr); |
309 | static inline int ipv6_addr_type(const struct in6_addr *addr) | |
310 | { | |
311 | return __ipv6_addr_type(addr) & 0xffff; | |
312 | } | |
1da177e4 LT |
313 | |
314 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
315 | { | |
b1cacb68 YH |
316 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
317 | } | |
318 | ||
319 | static inline int __ipv6_addr_src_scope(int type) | |
320 | { | |
a02cec21 | 321 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
322 | } |
323 | ||
324 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
325 | { | |
326 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
327 | } |
328 | ||
b7ef213e HFS |
329 | static inline bool __ipv6_addr_needs_scope_id(int type) |
330 | { | |
331 | return type & IPV6_ADDR_LINKLOCAL || | |
332 | (type & IPV6_ADDR_MULTICAST && | |
333 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
334 | } | |
335 | ||
336 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
337 | { | |
338 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
339 | } | |
340 | ||
1da177e4 LT |
341 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
342 | { | |
db3459d1 | 343 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
344 | } |
345 | ||
1a203cb3 | 346 | static inline bool |
f2ffd9ee PM |
347 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
348 | const struct in6_addr *a2) | |
349 | { | |
1a203cb3 ED |
350 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
351 | const unsigned long *ul1 = (const unsigned long *)a1; | |
352 | const unsigned long *ulm = (const unsigned long *)m; | |
353 | const unsigned long *ul2 = (const unsigned long *)a2; | |
354 | ||
355 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
356 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
357 | #else | |
a02cec21 ED |
358 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
359 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
360 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
361 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 362 | #endif |
f2ffd9ee PM |
363 | } |
364 | ||
1da177e4 LT |
365 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
366 | const struct in6_addr *addr, | |
367 | int plen) | |
368 | { | |
369 | /* caller must guarantee 0 <= plen <= 128 */ | |
370 | int o = plen >> 3, | |
371 | b = plen & 0x7; | |
372 | ||
db3459d1 | 373 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 374 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 375 | if (b != 0) |
1da177e4 | 376 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
377 | } |
378 | ||
5206c579 YH |
379 | static inline void __ipv6_addr_set_half(__be32 *addr, |
380 | __be32 wh, __be32 wl) | |
381 | { | |
382 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
383 | #if defined(__BIG_ENDIAN) | |
384 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
385 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
386 | return; | |
387 | } | |
388 | #elif defined(__LITTLE_ENDIAN) | |
389 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
390 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
391 | return; | |
392 | } | |
393 | #endif | |
394 | #endif | |
395 | addr[0] = wh; | |
396 | addr[1] = wl; | |
397 | } | |
398 | ||
1da177e4 | 399 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
400 | __be32 w1, __be32 w2, |
401 | __be32 w3, __be32 w4) | |
1da177e4 | 402 | { |
5206c579 YH |
403 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
404 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 405 | } |
1da177e4 | 406 | |
92113bfd ED |
407 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
408 | const struct in6_addr *a2) | |
1da177e4 | 409 | { |
1a203cb3 ED |
410 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
411 | const unsigned long *ul1 = (const unsigned long *)a1; | |
412 | const unsigned long *ul2 = (const unsigned long *)a2; | |
413 | ||
414 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
415 | #else | |
a02cec21 ED |
416 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
417 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
418 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
419 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 420 | #endif |
1da177e4 LT |
421 | } |
422 | ||
38675170 YH |
423 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
424 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
425 | const __be64 *a2, | |
426 | unsigned int len) | |
427 | { | |
512613d7 | 428 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
429 | return false; |
430 | return true; | |
431 | } | |
432 | ||
433 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
434 | const struct in6_addr *addr2, | |
435 | unsigned int prefixlen) | |
436 | { | |
437 | const __be64 *a1 = (const __be64 *)addr1; | |
438 | const __be64 *a2 = (const __be64 *)addr2; | |
439 | ||
440 | if (prefixlen >= 64) { | |
441 | if (a1[0] ^ a2[0]) | |
442 | return false; | |
443 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
444 | } | |
445 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
446 | } | |
447 | #else | |
2ef97332 YH |
448 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
449 | const struct in6_addr *addr2, | |
450 | unsigned int prefixlen) | |
1da177e4 | 451 | { |
2ef97332 YH |
452 | const __be32 *a1 = addr1->s6_addr32; |
453 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 454 | unsigned int pdw, pbi; |
1da177e4 LT |
455 | |
456 | /* check complete u32 in prefix */ | |
457 | pdw = prefixlen >> 5; | |
458 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 459 | return false; |
1da177e4 LT |
460 | |
461 | /* check incomplete u32 in prefix */ | |
462 | pbi = prefixlen & 0x1f; | |
463 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 464 | return false; |
1da177e4 | 465 | |
92113bfd | 466 | return true; |
1da177e4 | 467 | } |
38675170 | 468 | #endif |
1da177e4 | 469 | |
2588fe1d | 470 | struct inet_frag_queue; |
2588fe1d | 471 | |
0b5ccb2e PM |
472 | enum ip6_defrag_users { |
473 | IP6_DEFRAG_LOCAL_DELIVER, | |
474 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 475 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 476 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 477 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 478 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 479 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
480 | }; |
481 | ||
c6fda282 PE |
482 | struct ip6_create_arg { |
483 | __be32 id; | |
0b5ccb2e | 484 | u32 user; |
b71d1d42 ED |
485 | const struct in6_addr *src; |
486 | const struct in6_addr *dst; | |
eec2e618 | 487 | u8 ecn; |
c6fda282 PE |
488 | }; |
489 | ||
490 | void ip6_frag_init(struct inet_frag_queue *q, void *a); | |
cbc264ca | 491 | bool ip6_frag_match(struct inet_frag_queue *q, void *a); |
c6fda282 | 492 | |
b836c99f AW |
493 | /* |
494 | * Equivalent of ipv4 struct ip | |
495 | */ | |
496 | struct frag_queue { | |
497 | struct inet_frag_queue q; | |
498 | ||
499 | __be32 id; /* fragment id */ | |
500 | u32 user; | |
501 | struct in6_addr saddr; | |
502 | struct in6_addr daddr; | |
503 | ||
504 | int iif; | |
505 | unsigned int csum; | |
506 | __u16 nhoffset; | |
eec2e618 | 507 | u8 ecn; |
b836c99f AW |
508 | }; |
509 | ||
510 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq, | |
511 | struct inet_frags *frags); | |
512 | ||
92113bfd | 513 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 514 | { |
1a203cb3 ED |
515 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
516 | const unsigned long *ul = (const unsigned long *)a; | |
517 | ||
518 | return (ul[0] | ul[1]) == 0UL; | |
519 | #else | |
a02cec21 ED |
520 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
521 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 522 | #endif |
1da177e4 LT |
523 | } |
524 | ||
ddbe5032 ED |
525 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
526 | { | |
527 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
528 | const unsigned long *ul = (const unsigned long *)a; | |
529 | unsigned long x = ul[0] ^ ul[1]; | |
530 | ||
531 | return (u32)(x ^ (x >> 32)); | |
532 | #else | |
533 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
534 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
535 | #endif | |
536 | } | |
537 | ||
08dcdbf6 ED |
538 | /* more secured version of ipv6_addr_hash() */ |
539 | static inline u32 ipv6_addr_jhash(const struct in6_addr *a) | |
540 | { | |
541 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
542 | ||
543 | return jhash_3words(v, | |
544 | (__force u32)a->s6_addr32[2], | |
545 | (__force u32)a->s6_addr32[3], | |
546 | ipv6_hash_secret); | |
547 | } | |
548 | ||
92113bfd | 549 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 550 | { |
e287656b YH |
551 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
552 | const unsigned long *ul = (const unsigned long *)a; | |
553 | ||
554 | return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL; | |
555 | #else | |
a02cec21 ED |
556 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
557 | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; | |
e287656b | 558 | #endif |
f630e43a YH |
559 | } |
560 | ||
92113bfd | 561 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 562 | { |
a04d40b8 YH |
563 | return ( |
564 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
565 | *(__be64 *)a | | |
566 | #else | |
567 | (a->s6_addr32[0] | a->s6_addr32[1]) | | |
568 | #endif | |
569 | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL; | |
e773e4fa BH |
570 | } |
571 | ||
99cd07a5 JMT |
572 | /* |
573 | * Check for a RFC 4843 ORCHID address | |
574 | * (Overlay Routable Cryptographic Hash Identifiers) | |
575 | */ | |
92113bfd | 576 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 577 | { |
a02cec21 | 578 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
579 | } |
580 | ||
f15364bd AC |
581 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
582 | struct in6_addr *v4mapped) | |
583 | { | |
584 | ipv6_addr_set(v4mapped, | |
585 | 0, 0, | |
586 | htonl(0x0000FFFF), | |
587 | addr); | |
588 | } | |
589 | ||
971f359d YH |
590 | /* |
591 | * find the first different bit between two addresses | |
592 | * length of address must be a multiple of 32bits | |
593 | */ | |
9f2e7334 | 594 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 595 | { |
ef296f56 | 596 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
597 | int i; |
598 | ||
599 | addrlen >>= 2; | |
600 | ||
601 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
602 | __be32 xb = a1[i] ^ a2[i]; |
603 | if (xb) | |
d57b8fb8 | 604 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
605 | } |
606 | ||
607 | /* | |
608 | * we should *never* get to this point since that | |
609 | * would mean the addrs are equal | |
610 | * | |
611 | * However, we do get to it 8) And exacly, when | |
612 | * addresses are equal 8) | |
613 | * | |
614 | * ip route add 1111::/128 via ... | |
615 | * ip route add 1111::/64 via ... | |
616 | * and we are here. | |
617 | * | |
618 | * Ideally, this function should stop comparison | |
619 | * at prefix length. It does not, but it is still OK, | |
620 | * if returned value is greater than prefix length. | |
621 | * --ANK (980803) | |
622 | */ | |
a02cec21 | 623 | return addrlen << 5; |
971f359d YH |
624 | } |
625 | ||
9f2e7334 YH |
626 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
627 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
628 | { | |
629 | const __be64 *a1 = token1, *a2 = token2; | |
630 | int i; | |
631 | ||
632 | addrlen >>= 3; | |
633 | ||
634 | for (i = 0; i < addrlen; i++) { | |
635 | __be64 xb = a1[i] ^ a2[i]; | |
636 | if (xb) | |
637 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
638 | } | |
639 | ||
640 | return addrlen << 6; | |
641 | } | |
642 | #endif | |
643 | ||
644 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
645 | { | |
646 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
647 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
648 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
649 | #endif | |
650 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
651 | } | |
652 | ||
971f359d YH |
653 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
654 | { | |
655 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
656 | } | |
657 | ||
87c48fa3 | 658 | extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); |
7ea2f2c5 | 659 | |
3e4e4c1f YH |
660 | /* |
661 | * Header manipulation | |
662 | */ | |
663 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
664 | __be32 flowlabel) | |
665 | { | |
07f623d3 | 666 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
667 | } |
668 | ||
6502ca52 YH |
669 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
670 | { | |
671 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* |
675 | * Prototypes exported by ipv6 | |
676 | */ | |
677 | ||
678 | /* | |
679 | * rcv function (called from netdevice level) | |
680 | */ | |
681 | ||
682 | extern int ipv6_rcv(struct sk_buff *skb, | |
683 | struct net_device *dev, | |
f2ccd8fa DM |
684 | struct packet_type *pt, |
685 | struct net_device *orig_dev); | |
1da177e4 | 686 | |
b05e1066 PM |
687 | extern int ip6_rcv_finish(struct sk_buff *skb); |
688 | ||
1da177e4 LT |
689 | /* |
690 | * upper-layer output functions | |
691 | */ | |
692 | extern int ip6_xmit(struct sock *sk, | |
693 | struct sk_buff *skb, | |
4c9483b2 | 694 | struct flowi6 *fl6, |
b903d324 ED |
695 | struct ipv6_txoptions *opt, |
696 | int tclass); | |
1da177e4 | 697 | |
1da177e4 LT |
698 | extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); |
699 | ||
700 | extern int ip6_append_data(struct sock *sk, | |
701 | int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), | |
702 | void *from, | |
703 | int length, | |
704 | int transhdrlen, | |
705 | int hlimit, | |
41a1f8ea | 706 | int tclass, |
1da177e4 | 707 | struct ipv6_txoptions *opt, |
4c9483b2 | 708 | struct flowi6 *fl6, |
1da177e4 | 709 | struct rt6_info *rt, |
13b52cd4 BH |
710 | unsigned int flags, |
711 | int dontfrag); | |
1da177e4 LT |
712 | |
713 | extern int ip6_push_pending_frames(struct sock *sk); | |
714 | ||
715 | extern void ip6_flush_pending_frames(struct sock *sk); | |
716 | ||
717 | extern int ip6_dst_lookup(struct sock *sk, | |
718 | struct dst_entry **dst, | |
4c9483b2 | 719 | struct flowi6 *fl6); |
68d0c6d3 | 720 | extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, |
4c9483b2 | 721 | struct flowi6 *fl6, |
68d0c6d3 | 722 | const struct in6_addr *final_dst, |
a1414715 | 723 | bool can_sleep); |
68d0c6d3 | 724 | extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, |
4c9483b2 | 725 | struct flowi6 *fl6, |
68d0c6d3 | 726 | const struct in6_addr *final_dst, |
a1414715 | 727 | bool can_sleep); |
2774c131 DM |
728 | extern struct dst_entry * ip6_blackhole_route(struct net *net, |
729 | struct dst_entry *orig_dst); | |
1da177e4 LT |
730 | |
731 | /* | |
732 | * skb processing functions | |
733 | */ | |
734 | ||
735 | extern int ip6_output(struct sk_buff *skb); | |
736 | extern int ip6_forward(struct sk_buff *skb); | |
737 | extern int ip6_input(struct sk_buff *skb); | |
738 | extern int ip6_mc_input(struct sk_buff *skb); | |
739 | ||
ef76bc23 HX |
740 | extern int __ip6_local_out(struct sk_buff *skb); |
741 | extern int ip6_local_out(struct sk_buff *skb); | |
742 | ||
1da177e4 LT |
743 | /* |
744 | * Extension header (options) processing | |
745 | */ | |
746 | ||
1da177e4 LT |
747 | extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
748 | struct ipv6_txoptions *opt, | |
749 | u8 *proto, | |
750 | struct in6_addr **daddr_p); | |
751 | extern void ipv6_push_frag_opts(struct sk_buff *skb, | |
752 | struct ipv6_txoptions *opt, | |
753 | u8 *proto); | |
754 | ||
755 | extern int ipv6_skip_exthdr(const struct sk_buff *, int start, | |
75f2811c | 756 | u8 *nexthdrp, __be16 *frag_offp); |
1da177e4 | 757 | |
a50feda5 | 758 | extern bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 759 | |
f8f62675 | 760 | enum { |
9195bb8e AA |
761 | IP6_FH_F_FRAG = (1 << 0), |
762 | IP6_FH_F_AUTH = (1 << 1), | |
763 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
764 | }; |
765 | ||
766 | /* find specified header and get offset to it */ | |
767 | extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, | |
768 | int target, unsigned short *fragoff, int *fragflg); | |
769 | ||
c61a4043 MN |
770 | extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
771 | ||
4c9483b2 | 772 | extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
20c59de2 AE |
773 | const struct ipv6_txoptions *opt, |
774 | struct in6_addr *orig); | |
775 | ||
1da177e4 LT |
776 | /* |
777 | * socket options (ipv6_sockglue.c) | |
778 | */ | |
779 | ||
780 | extern int ipv6_setsockopt(struct sock *sk, int level, | |
781 | int optname, | |
782 | char __user *optval, | |
b7058842 | 783 | unsigned int optlen); |
1da177e4 LT |
784 | extern int ipv6_getsockopt(struct sock *sk, int level, |
785 | int optname, | |
786 | char __user *optval, | |
787 | int __user *optlen); | |
3fdadf7d DM |
788 | extern int compat_ipv6_setsockopt(struct sock *sk, |
789 | int level, | |
790 | int optname, | |
791 | char __user *optval, | |
b7058842 | 792 | unsigned int optlen); |
3fdadf7d DM |
793 | extern int compat_ipv6_getsockopt(struct sock *sk, |
794 | int level, | |
795 | int optname, | |
796 | char __user *optval, | |
797 | int __user *optlen); | |
1da177e4 | 798 | |
1da177e4 LT |
799 | extern int ip6_datagram_connect(struct sock *sk, |
800 | struct sockaddr *addr, int addr_len); | |
801 | ||
802 | extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); | |
4b340ae2 | 803 | extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); |
e69a4adc | 804 | extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1da177e4 | 805 | u32 info, u8 *payload); |
4c9483b2 DM |
806 | extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); |
807 | extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1da177e4 LT |
808 | |
809 | extern int inet6_release(struct socket *sock); | |
810 | extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, | |
811 | int addr_len); | |
812 | extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, | |
813 | int *uaddr_len, int peer); | |
814 | extern int inet6_ioctl(struct socket *sock, unsigned int cmd, | |
815 | unsigned long arg); | |
816 | ||
d8313f5c ACM |
817 | extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
818 | struct sock *sk); | |
819 | ||
1da177e4 LT |
820 | /* |
821 | * reassembly.c | |
822 | */ | |
90ddc4f0 ED |
823 | extern const struct proto_ops inet6_stream_ops; |
824 | extern const struct proto_ops inet6_dgram_ops; | |
20380731 | 825 | |
14c85021 ACM |
826 | struct group_source_req; |
827 | struct group_filter; | |
828 | ||
20380731 ACM |
829 | extern int ip6_mc_source(int add, int omode, struct sock *sk, |
830 | struct group_source_req *pgsr); | |
831 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
832 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
833 | struct group_filter __user *optval, | |
834 | int __user *optlen); | |
93c8b90f IJ |
835 | extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, |
836 | const struct in6_addr *daddr, u32 rnd); | |
20380731 ACM |
837 | |
838 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
839 | extern int ac6_proc_init(struct net *net); |
840 | extern void ac6_proc_exit(struct net *net); | |
20380731 ACM |
841 | extern int raw6_proc_init(void); |
842 | extern void raw6_proc_exit(void); | |
6f8b13bc DL |
843 | extern int tcp6_proc_init(struct net *net); |
844 | extern void tcp6_proc_exit(struct net *net); | |
0c96d8c5 DL |
845 | extern int udp6_proc_init(struct net *net); |
846 | extern void udp6_proc_exit(struct net *net); | |
ba4e58ec GR |
847 | extern int udplite6_proc_init(void); |
848 | extern void udplite6_proc_exit(void); | |
20380731 ACM |
849 | extern int ipv6_misc_proc_init(void); |
850 | extern void ipv6_misc_proc_exit(void); | |
7f7d9a6b HX |
851 | extern int snmp6_register_dev(struct inet6_dev *idev); |
852 | extern int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 853 | |
7f7d9a6b | 854 | #else |
6ab57e7e DL |
855 | static inline int ac6_proc_init(struct net *net) { return 0; } |
856 | static inline void ac6_proc_exit(struct net *net) { } | |
857 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
858 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 859 | #endif |
1da177e4 | 860 | |
20380731 | 861 | #ifdef CONFIG_SYSCTL |
9e8cda3b JP |
862 | extern struct ctl_table ipv6_route_table_template[]; |
863 | extern struct ctl_table ipv6_icmp_table_template[]; | |
1da177e4 | 864 | |
6de1a910 DL |
865 | extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
866 | extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
291480c0 | 867 | extern int ipv6_sysctl_register(void); |
20380731 ACM |
868 | extern void ipv6_sysctl_unregister(void); |
869 | #endif | |
1da177e4 | 870 | |
20380731 | 871 | #endif /* _NET_IPV6_H */ |