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> | |
1bd758eb | 22 | #include <net/flow_dissector.h> |
1da177e4 LT |
23 | #include <net/snmp.h> |
24 | ||
25 | #define SIN6_LEN_RFC2133 24 | |
26 | ||
27 | #define IPV6_MAXPLEN 65535 | |
28 | ||
29 | /* | |
30 | * NextHeader field of IPv6 header | |
31 | */ | |
32 | ||
33 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ | |
34 | #define NEXTHDR_TCP 6 /* TCP segment. */ | |
35 | #define NEXTHDR_UDP 17 /* UDP message. */ | |
36 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ | |
37 | #define NEXTHDR_ROUTING 43 /* Routing header. */ | |
38 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ | |
c12b395a | 39 | #define NEXTHDR_GRE 47 /* GRE header. */ |
1da177e4 LT |
40 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
41 | #define NEXTHDR_AUTH 51 /* Authentication header. */ | |
42 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ | |
43 | #define NEXTHDR_NONE 59 /* No next header */ | |
44 | #define NEXTHDR_DEST 60 /* Destination options header. */ | |
280c571e | 45 | #define NEXTHDR_SCTP 132 /* SCTP message. */ |
2b741653 | 46 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
1da177e4 LT |
47 | |
48 | #define NEXTHDR_MAX 255 | |
49 | ||
1da177e4 LT |
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 | ||
1431fb31 PD |
112 | #define IP6_MF 0x0001 |
113 | #define IP6_OFFSET 0xFFF8 | |
1da177e4 | 114 | |
e110861f LC |
115 | #define IP6_REPLY_MARK(net, mark) \ |
116 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) | |
117 | ||
1da177e4 LT |
118 | #include <net/sock.h> |
119 | ||
120 | /* sysctls */ | |
1da177e4 | 121 | extern int sysctl_mld_max_msf; |
2f711939 | 122 | extern int sysctl_mld_qrv; |
3d7cc2ba | 123 | |
087fe240 | 124 | #define _DEVINC(net, statname, modifier, idev, field) \ |
14878f75 | 125 | ({ \ |
a11d206d YH |
126 | struct inet6_dev *_idev = (idev); \ |
127 | if (likely(_idev != NULL)) \ | |
14878f75 | 128 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
9261e537 | 129 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
a11d206d | 130 | }) |
14878f75 | 131 | |
be281e55 ED |
132 | /* per device counters are atomic_long_t */ |
133 | #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ | |
134 | ({ \ | |
135 | struct inet6_dev *_idev = (idev); \ | |
136 | if (likely(_idev != NULL)) \ | |
137 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
138 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ | |
139 | }) | |
140 | ||
2a24444f ED |
141 | /* per device and per net counters are atomic_long_t */ |
142 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
143 | ({ \ | |
144 | struct inet6_dev *_idev = (idev); \ | |
145 | if (likely(_idev != NULL)) \ | |
146 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
147 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
148 | }) | |
149 | ||
087fe240 | 150 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
8e7999c4 PE |
151 | ({ \ |
152 | struct inet6_dev *_idev = (idev); \ | |
153 | if (likely(_idev != NULL)) \ | |
154 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ | |
9261e537 | 155 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
8e7999c4 PE |
156 | }) |
157 | ||
edf391ff NH |
158 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
159 | ({ \ | |
160 | struct inet6_dev *_idev = (idev); \ | |
161 | if (likely(_idev != NULL)) \ | |
162 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ | |
163 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ | |
164 | }) | |
165 | ||
14878f75 | 166 | /* MIBs */ |
14878f75 | 167 | |
087fe240 | 168 | #define IP6_INC_STATS(net, idev,field) \ |
4ce3c183 | 169 | _DEVINC(net, ipv6, 64, idev, field) |
087fe240 | 170 | #define IP6_INC_STATS_BH(net, idev,field) \ |
4ce3c183 | 171 | _DEVINC(net, ipv6, 64_BH, idev, field) |
edf391ff | 172 | #define IP6_ADD_STATS(net, idev,field,val) \ |
4ce3c183 | 173 | _DEVADD(net, ipv6, 64, idev, field, val) |
087fe240 | 174 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 175 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
edf391ff | 176 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
4ce3c183 | 177 | _DEVUPD(net, ipv6, 64, idev, field, val) |
edf391ff | 178 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 179 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
087fe240 | 180 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 181 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
087fe240 | 182 | #define ICMP6_INC_STATS_BH(net, idev, field) \ |
be281e55 | 183 | _DEVINCATOMIC(net, icmpv6, _BH, idev, field) |
087fe240 DL |
184 | |
185 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 186 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 187 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ |
2a24444f | 188 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 189 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ |
2a24444f | 190 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 191 | |
fd2c3ef7 | 192 | struct ip6_ra_chain { |
1da177e4 LT |
193 | struct ip6_ra_chain *next; |
194 | struct sock *sk; | |
195 | int sel; | |
196 | void (*destructor)(struct sock *); | |
197 | }; | |
198 | ||
199 | extern struct ip6_ra_chain *ip6_ra_chain; | |
200 | extern rwlock_t ip6_ra_lock; | |
201 | ||
202 | /* | |
203 | This structure is prepared by protocol, when parsing | |
204 | ancillary data and passed to IPv6. | |
205 | */ | |
206 | ||
fd2c3ef7 | 207 | struct ipv6_txoptions { |
45f6fad8 | 208 | atomic_t refcnt; |
1da177e4 LT |
209 | /* Length of this structure */ |
210 | int tot_len; | |
211 | ||
212 | /* length of extension headers */ | |
213 | ||
214 | __u16 opt_flen; /* after fragment hdr */ | |
215 | __u16 opt_nflen; /* before fragment hdr */ | |
216 | ||
217 | struct ipv6_opt_hdr *hopopt; | |
218 | struct ipv6_opt_hdr *dst0opt; | |
219 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 220 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 221 | struct rcu_head rcu; |
1da177e4 LT |
222 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
223 | }; | |
224 | ||
fd2c3ef7 | 225 | struct ip6_flowlabel { |
7f0e44ac | 226 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 227 | __be32 label; |
db3459d1 | 228 | atomic_t users; |
1da177e4 LT |
229 | struct in6_addr dst; |
230 | struct ipv6_txoptions *opt; | |
1da177e4 | 231 | unsigned long linger; |
d3aedd5e | 232 | struct rcu_head rcu; |
1da177e4 | 233 | u8 share; |
4f82f457 EB |
234 | union { |
235 | struct pid *pid; | |
236 | kuid_t uid; | |
237 | } owner; | |
1da177e4 LT |
238 | unsigned long lastuse; |
239 | unsigned long expires; | |
60e8fbc4 | 240 | struct net *fl_net; |
1da177e4 LT |
241 | }; |
242 | ||
82a584b7 TH |
243 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
244 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
245 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
246 | ||
37cfee90 | 247 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 248 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 249 | |
fd2c3ef7 | 250 | struct ipv6_fl_socklist { |
7f0e44ac ED |
251 | struct ipv6_fl_socklist __rcu *next; |
252 | struct ip6_flowlabel *fl; | |
253 | struct rcu_head rcu; | |
1da177e4 LT |
254 | }; |
255 | ||
45f6fad8 ED |
256 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
257 | { | |
258 | struct ipv6_txoptions *opt; | |
259 | ||
260 | rcu_read_lock(); | |
261 | opt = rcu_dereference(np->opt); | |
e550785c BP |
262 | if (opt) { |
263 | if (!atomic_inc_not_zero(&opt->refcnt)) | |
264 | opt = NULL; | |
265 | else | |
266 | opt = rcu_pointer_handoff(opt); | |
267 | } | |
45f6fad8 ED |
268 | rcu_read_unlock(); |
269 | return opt; | |
270 | } | |
271 | ||
272 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
273 | { | |
274 | if (opt && atomic_dec_and_test(&opt->refcnt)) | |
275 | kfree_rcu(opt, rcu); | |
276 | } | |
277 | ||
5c3a0fd7 JP |
278 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
279 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
280 | struct ip6_flowlabel *fl, | |
281 | struct ipv6_txoptions *fopt); | |
282 | void fl6_free_socklist(struct sock *sk); | |
283 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
284 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
285 | int flags); | |
5c3a0fd7 JP |
286 | int ip6_flowlabel_init(void); |
287 | void ip6_flowlabel_cleanup(void); | |
1da177e4 LT |
288 | |
289 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
290 | { | |
291 | if (fl) | |
292 | atomic_dec(&fl->users); | |
293 | } | |
294 | ||
5c3a0fd7 | 295 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 296 | |
6d0bfe22 LC |
297 | int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
298 | struct icmp6hdr *thdr, int len); | |
299 | ||
5c3a0fd7 | 300 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 301 | |
5c3a0fd7 | 302 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 303 | |
5c3a0fd7 JP |
304 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
305 | struct ipv6_txoptions *opt); | |
306 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
307 | struct ipv6_txoptions *opt, | |
308 | int newtype, | |
309 | struct ipv6_opt_hdr __user *newopt, | |
310 | int newoptlen); | |
df9890c3 YH |
311 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
312 | struct ipv6_txoptions *opt); | |
1da177e4 | 313 | |
a224772d ED |
314 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
315 | const struct inet6_skb_parm *opt); | |
399c07de | 316 | |
aeaf6e9d SL |
317 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
318 | { | |
319 | /* If forwarding is enabled, RA are not accepted unless the special | |
320 | * hybrid mode (accept_ra=2) is enabled. | |
321 | */ | |
322 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
323 | idev->cnf.accept_ra; | |
324 | } | |
325 | ||
d4915c08 | 326 | #if IS_ENABLED(CONFIG_IPV6) |
d4915c08 AW |
327 | static inline int ip6_frag_mem(struct net *net) |
328 | { | |
d433673e | 329 | return sum_frag_mem_limit(&net->ipv6.frags); |
d4915c08 AW |
330 | } |
331 | #endif | |
1da177e4 | 332 | |
c2a93660 JDB |
333 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
334 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 335 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 336 | |
5c3a0fd7 | 337 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
338 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
339 | { | |
340 | return __ipv6_addr_type(addr) & 0xffff; | |
341 | } | |
1da177e4 LT |
342 | |
343 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
344 | { | |
b1cacb68 YH |
345 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
346 | } | |
347 | ||
348 | static inline int __ipv6_addr_src_scope(int type) | |
349 | { | |
a02cec21 | 350 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
351 | } |
352 | ||
353 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
354 | { | |
355 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
356 | } |
357 | ||
b7ef213e HFS |
358 | static inline bool __ipv6_addr_needs_scope_id(int type) |
359 | { | |
360 | return type & IPV6_ADDR_LINKLOCAL || | |
361 | (type & IPV6_ADDR_MULTICAST && | |
362 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
363 | } | |
364 | ||
365 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
366 | { | |
367 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
368 | } | |
369 | ||
1da177e4 LT |
370 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
371 | { | |
db3459d1 | 372 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
373 | } |
374 | ||
1a203cb3 | 375 | static inline bool |
f2ffd9ee PM |
376 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
377 | const struct in6_addr *a2) | |
378 | { | |
1a203cb3 ED |
379 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
380 | const unsigned long *ul1 = (const unsigned long *)a1; | |
381 | const unsigned long *ulm = (const unsigned long *)m; | |
382 | const unsigned long *ul2 = (const unsigned long *)a2; | |
383 | ||
384 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
385 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
386 | #else | |
a02cec21 ED |
387 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
388 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
389 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
390 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 391 | #endif |
f2ffd9ee PM |
392 | } |
393 | ||
1da177e4 LT |
394 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
395 | const struct in6_addr *addr, | |
396 | int plen) | |
397 | { | |
398 | /* caller must guarantee 0 <= plen <= 128 */ | |
399 | int o = plen >> 3, | |
400 | b = plen & 0x7; | |
401 | ||
db3459d1 | 402 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 403 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 404 | if (b != 0) |
1da177e4 | 405 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
406 | } |
407 | ||
818f1f3e AA |
408 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
409 | const struct in6_addr *pfx, | |
410 | int plen) | |
411 | { | |
412 | /* caller must guarantee 0 <= plen <= 128 */ | |
413 | int o = plen >> 3, | |
414 | b = plen & 0x7; | |
415 | ||
416 | memcpy(addr->s6_addr, pfx, o); | |
417 | if (b != 0) { | |
418 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
419 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
420 | } | |
421 | } | |
422 | ||
5206c579 YH |
423 | static inline void __ipv6_addr_set_half(__be32 *addr, |
424 | __be32 wh, __be32 wl) | |
425 | { | |
426 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
427 | #if defined(__BIG_ENDIAN) | |
428 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
429 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
430 | return; | |
431 | } | |
432 | #elif defined(__LITTLE_ENDIAN) | |
433 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
434 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
435 | return; | |
436 | } | |
437 | #endif | |
438 | #endif | |
439 | addr[0] = wh; | |
440 | addr[1] = wl; | |
441 | } | |
442 | ||
1da177e4 | 443 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
444 | __be32 w1, __be32 w2, |
445 | __be32 w3, __be32 w4) | |
1da177e4 | 446 | { |
5206c579 YH |
447 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
448 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 449 | } |
1da177e4 | 450 | |
92113bfd ED |
451 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
452 | const struct in6_addr *a2) | |
1da177e4 | 453 | { |
1a203cb3 ED |
454 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
455 | const unsigned long *ul1 = (const unsigned long *)a1; | |
456 | const unsigned long *ul2 = (const unsigned long *)a2; | |
457 | ||
458 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
459 | #else | |
a02cec21 ED |
460 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
461 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
462 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
463 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 464 | #endif |
1da177e4 LT |
465 | } |
466 | ||
38675170 YH |
467 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
468 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
469 | const __be64 *a2, | |
470 | unsigned int len) | |
471 | { | |
512613d7 | 472 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
473 | return false; |
474 | return true; | |
475 | } | |
476 | ||
477 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
478 | const struct in6_addr *addr2, | |
479 | unsigned int prefixlen) | |
480 | { | |
481 | const __be64 *a1 = (const __be64 *)addr1; | |
482 | const __be64 *a2 = (const __be64 *)addr2; | |
483 | ||
484 | if (prefixlen >= 64) { | |
485 | if (a1[0] ^ a2[0]) | |
486 | return false; | |
487 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
488 | } | |
489 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
490 | } | |
491 | #else | |
2ef97332 YH |
492 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
493 | const struct in6_addr *addr2, | |
494 | unsigned int prefixlen) | |
1da177e4 | 495 | { |
2ef97332 YH |
496 | const __be32 *a1 = addr1->s6_addr32; |
497 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 498 | unsigned int pdw, pbi; |
1da177e4 LT |
499 | |
500 | /* check complete u32 in prefix */ | |
501 | pdw = prefixlen >> 5; | |
502 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 503 | return false; |
1da177e4 LT |
504 | |
505 | /* check incomplete u32 in prefix */ | |
506 | pbi = prefixlen & 0x1f; | |
507 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 508 | return false; |
1da177e4 | 509 | |
92113bfd | 510 | return true; |
1da177e4 | 511 | } |
38675170 | 512 | #endif |
1da177e4 | 513 | |
2588fe1d | 514 | struct inet_frag_queue; |
2588fe1d | 515 | |
0b5ccb2e PM |
516 | enum ip6_defrag_users { |
517 | IP6_DEFRAG_LOCAL_DELIVER, | |
518 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 519 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 520 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 521 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 522 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 523 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
524 | }; |
525 | ||
c6fda282 PE |
526 | struct ip6_create_arg { |
527 | __be32 id; | |
0b5ccb2e | 528 | u32 user; |
b71d1d42 ED |
529 | const struct in6_addr *src; |
530 | const struct in6_addr *dst; | |
264640fc | 531 | int iif; |
eec2e618 | 532 | u8 ecn; |
c6fda282 PE |
533 | }; |
534 | ||
36c77782 FW |
535 | void ip6_frag_init(struct inet_frag_queue *q, const void *a); |
536 | bool ip6_frag_match(const struct inet_frag_queue *q, const void *a); | |
c6fda282 | 537 | |
b836c99f AW |
538 | /* |
539 | * Equivalent of ipv4 struct ip | |
540 | */ | |
541 | struct frag_queue { | |
542 | struct inet_frag_queue q; | |
543 | ||
544 | __be32 id; /* fragment id */ | |
545 | u32 user; | |
546 | struct in6_addr saddr; | |
547 | struct in6_addr daddr; | |
548 | ||
549 | int iif; | |
550 | unsigned int csum; | |
551 | __u16 nhoffset; | |
eec2e618 | 552 | u8 ecn; |
b836c99f AW |
553 | }; |
554 | ||
555 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq, | |
556 | struct inet_frags *frags); | |
557 | ||
92113bfd | 558 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 559 | { |
1a203cb3 ED |
560 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
561 | const unsigned long *ul = (const unsigned long *)a; | |
562 | ||
563 | return (ul[0] | ul[1]) == 0UL; | |
564 | #else | |
a02cec21 ED |
565 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
566 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 567 | #endif |
1da177e4 LT |
568 | } |
569 | ||
ddbe5032 ED |
570 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
571 | { | |
572 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
573 | const unsigned long *ul = (const unsigned long *)a; | |
574 | unsigned long x = ul[0] ^ ul[1]; | |
575 | ||
576 | return (u32)(x ^ (x >> 32)); | |
577 | #else | |
578 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
579 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
580 | #endif | |
581 | } | |
582 | ||
08dcdbf6 | 583 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 584 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
585 | { |
586 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
587 | ||
588 | return jhash_3words(v, | |
589 | (__force u32)a->s6_addr32[2], | |
590 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 591 | initval); |
08dcdbf6 ED |
592 | } |
593 | ||
92113bfd | 594 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 595 | { |
e287656b | 596 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 597 | const __be64 *be = (const __be64 *)a; |
e287656b | 598 | |
1373a773 | 599 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 600 | #else |
a02cec21 | 601 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 602 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 603 | #endif |
f630e43a YH |
604 | } |
605 | ||
1373a773 JL |
606 | /* |
607 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
608 | * since all of the endian-annotated types are fixed size regardless of arch. | |
609 | */ | |
92113bfd | 610 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 611 | { |
a04d40b8 YH |
612 | return ( |
613 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 614 | *(unsigned long *)a | |
a04d40b8 | 615 | #else |
1373a773 | 616 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 617 | #endif |
1373a773 JL |
618 | (__force unsigned long)(a->s6_addr32[2] ^ |
619 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
620 | } |
621 | ||
99cd07a5 JMT |
622 | /* |
623 | * Check for a RFC 4843 ORCHID address | |
624 | * (Overlay Routable Cryptographic Hash Identifiers) | |
625 | */ | |
92113bfd | 626 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 627 | { |
a02cec21 | 628 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
629 | } |
630 | ||
5c98631c LC |
631 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
632 | { | |
633 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
634 | } | |
635 | ||
f15364bd AC |
636 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
637 | struct in6_addr *v4mapped) | |
638 | { | |
639 | ipv6_addr_set(v4mapped, | |
640 | 0, 0, | |
641 | htonl(0x0000FFFF), | |
642 | addr); | |
643 | } | |
644 | ||
971f359d YH |
645 | /* |
646 | * find the first different bit between two addresses | |
647 | * length of address must be a multiple of 32bits | |
648 | */ | |
9f2e7334 | 649 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 650 | { |
ef296f56 | 651 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
652 | int i; |
653 | ||
654 | addrlen >>= 2; | |
655 | ||
656 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
657 | __be32 xb = a1[i] ^ a2[i]; |
658 | if (xb) | |
d57b8fb8 | 659 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
660 | } |
661 | ||
662 | /* | |
663 | * we should *never* get to this point since that | |
664 | * would mean the addrs are equal | |
665 | * | |
666 | * However, we do get to it 8) And exacly, when | |
667 | * addresses are equal 8) | |
668 | * | |
669 | * ip route add 1111::/128 via ... | |
670 | * ip route add 1111::/64 via ... | |
671 | * and we are here. | |
672 | * | |
673 | * Ideally, this function should stop comparison | |
674 | * at prefix length. It does not, but it is still OK, | |
675 | * if returned value is greater than prefix length. | |
676 | * --ANK (980803) | |
677 | */ | |
a02cec21 | 678 | return addrlen << 5; |
971f359d YH |
679 | } |
680 | ||
9f2e7334 YH |
681 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
682 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
683 | { | |
684 | const __be64 *a1 = token1, *a2 = token2; | |
685 | int i; | |
686 | ||
687 | addrlen >>= 3; | |
688 | ||
689 | for (i = 0; i < addrlen; i++) { | |
690 | __be64 xb = a1[i] ^ a2[i]; | |
691 | if (xb) | |
692 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
693 | } | |
694 | ||
695 | return addrlen << 6; | |
696 | } | |
697 | #endif | |
698 | ||
699 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
700 | { | |
701 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
702 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
703 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
704 | #endif | |
705 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
706 | } | |
707 | ||
971f359d YH |
708 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
709 | { | |
710 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
711 | } | |
712 | ||
7f159867 ED |
713 | __be32 ipv6_select_ident(struct net *net, |
714 | const struct in6_addr *daddr, | |
715 | const struct in6_addr *saddr); | |
5a352dd0 | 716 | void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 717 | |
5c3a0fd7 | 718 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 719 | |
5c98631c LC |
720 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
721 | struct dst_entry *dst) | |
722 | { | |
723 | int hlimit; | |
724 | ||
725 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
726 | hlimit = np->mcast_hops; | |
727 | else | |
728 | hlimit = np->hop_limit; | |
729 | if (hlimit < 0) | |
730 | hlimit = ip6_dst_hoplimit(dst); | |
731 | return hlimit; | |
732 | } | |
733 | ||
c3f83241 TH |
734 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
735 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
736 | * flow->v6addrs.dst = iph->daddr; | |
737 | */ | |
738 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
739 | const struct ipv6hdr *iph) | |
740 | { | |
741 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
742 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
743 | sizeof(flow->addrs.v6addrs.src)); | |
744 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
745 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
746 | } | |
747 | ||
a37934fc | 748 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 TH |
749 | |
750 | /* Sysctl settings for net ipv6.auto_flowlabels */ | |
751 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
752 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
753 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
754 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
755 | ||
756 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
757 | ||
b5677416 | 758 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 759 | |
cb1ce2ef | 760 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
761 | __be32 flowlabel, bool autolabel, |
762 | struct flowi6 *fl6) | |
cb1ce2ef | 763 | { |
42240901 | 764 | u32 hash; |
cb1ce2ef | 765 | |
42240901 TH |
766 | if (flowlabel || |
767 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
768 | (!autolabel && | |
769 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
770 | return flowlabel; | |
cb1ce2ef | 771 | |
42240901 | 772 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 773 | |
42240901 TH |
774 | /* Since this is being sent on the wire obfuscate hash a bit |
775 | * to minimize possbility that any useful information to an | |
776 | * attacker is leaked. Only lower 20 bits are relevant. | |
777 | */ | |
778 | rol32(hash, 16); | |
82a584b7 | 779 | |
42240901 TH |
780 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
781 | ||
782 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
783 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
784 | |
785 | return flowlabel; | |
786 | } | |
42240901 TH |
787 | |
788 | static inline int ip6_default_np_autolabel(struct net *net) | |
789 | { | |
790 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
791 | case IP6_AUTO_FLOW_LABEL_OFF: | |
792 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
793 | default: | |
794 | return 0; | |
795 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
796 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
797 | return 1; | |
798 | } | |
799 | } | |
a37934fc FF |
800 | #else |
801 | static inline void ip6_set_txhash(struct sock *sk) { } | |
802 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
803 | __be32 flowlabel, bool autolabel, |
804 | struct flowi6 *fl6) | |
a37934fc FF |
805 | { |
806 | return flowlabel; | |
807 | } | |
42240901 TH |
808 | static inline int ip6_default_np_autolabel(struct net *net) |
809 | { | |
810 | return 0; | |
811 | } | |
a37934fc FF |
812 | #endif |
813 | ||
cb1ce2ef | 814 | |
3e4e4c1f YH |
815 | /* |
816 | * Header manipulation | |
817 | */ | |
818 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
819 | __be32 flowlabel) | |
820 | { | |
07f623d3 | 821 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
822 | } |
823 | ||
6502ca52 YH |
824 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
825 | { | |
826 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
827 | } | |
828 | ||
3308de2b FF |
829 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
830 | { | |
831 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
832 | } | |
833 | ||
d76ed22b LR |
834 | static inline u8 ip6_tclass(__be32 flowinfo) |
835 | { | |
836 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
837 | } | |
eaa93bf4 DB |
838 | |
839 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
840 | { | |
841 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | /* |
845 | * Prototypes exported by ipv6 | |
846 | */ | |
847 | ||
848 | /* | |
849 | * rcv function (called from netdevice level) | |
850 | */ | |
851 | ||
5c3a0fd7 JP |
852 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
853 | struct packet_type *pt, struct net_device *orig_dev); | |
1da177e4 | 854 | |
0c4b51f0 | 855 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 856 | |
1da177e4 LT |
857 | /* |
858 | * upper-layer output functions | |
859 | */ | |
1c1e9d2b | 860 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
5c3a0fd7 JP |
861 | struct ipv6_txoptions *opt, int tclass); |
862 | ||
863 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
864 | ||
865 | int ip6_append_data(struct sock *sk, | |
866 | int getfrag(void *from, char *to, int offset, int len, | |
867 | int odd, struct sk_buff *skb), | |
868 | void *from, int length, int transhdrlen, int hlimit, | |
869 | int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6, | |
c14ac945 SHY |
870 | struct rt6_info *rt, unsigned int flags, int dontfrag, |
871 | const struct sockcm_cookie *sockc); | |
5c3a0fd7 JP |
872 | |
873 | int ip6_push_pending_frames(struct sock *sk); | |
874 | ||
875 | void ip6_flush_pending_frames(struct sock *sk); | |
876 | ||
6422398c VY |
877 | int ip6_send_skb(struct sk_buff *skb); |
878 | ||
879 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
880 | struct inet_cork_full *cork, | |
881 | struct inet6_cork *v6_cork); | |
882 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
883 | int getfrag(void *from, char *to, int offset, | |
884 | int len, int odd, struct sk_buff *skb), | |
885 | void *from, int length, int transhdrlen, | |
886 | int hlimit, int tclass, struct ipv6_txoptions *opt, | |
887 | struct flowi6 *fl6, struct rt6_info *rt, | |
c14ac945 SHY |
888 | unsigned int flags, int dontfrag, |
889 | const struct sockcm_cookie *sockc); | |
6422398c VY |
890 | |
891 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
892 | { | |
893 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
894 | &inet6_sk(sk)->cork); | |
895 | } | |
896 | ||
343d60aa RP |
897 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
898 | struct flowi6 *fl6); | |
3aef934f | 899 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 900 | const struct in6_addr *final_dst); |
5c3a0fd7 | 901 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 902 | const struct in6_addr *final_dst); |
5c3a0fd7 JP |
903 | struct dst_entry *ip6_blackhole_route(struct net *net, |
904 | struct dst_entry *orig_dst); | |
1da177e4 LT |
905 | |
906 | /* | |
907 | * skb processing functions | |
908 | */ | |
909 | ||
ede2059d | 910 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
911 | int ip6_forward(struct sk_buff *skb); |
912 | int ip6_input(struct sk_buff *skb); | |
913 | int ip6_mc_input(struct sk_buff *skb); | |
1da177e4 | 914 | |
cf91a99d | 915 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 916 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 917 | |
1da177e4 LT |
918 | /* |
919 | * Extension header (options) processing | |
920 | */ | |
921 | ||
5c3a0fd7 JP |
922 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
923 | u8 *proto, struct in6_addr **daddr_p); | |
924 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, | |
925 | u8 *proto); | |
1da177e4 | 926 | |
5c3a0fd7 JP |
927 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
928 | __be16 *frag_offp); | |
1da177e4 | 929 | |
5c3a0fd7 | 930 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 931 | |
f8f62675 | 932 | enum { |
9195bb8e AA |
933 | IP6_FH_F_FRAG = (1 << 0), |
934 | IP6_FH_F_AUTH = (1 << 1), | |
935 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
936 | }; |
937 | ||
938 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
939 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
940 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 941 | |
5c3a0fd7 | 942 | int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
c61a4043 | 943 | |
5c3a0fd7 JP |
944 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
945 | const struct ipv6_txoptions *opt, | |
946 | struct in6_addr *orig); | |
20c59de2 | 947 | |
1da177e4 LT |
948 | /* |
949 | * socket options (ipv6_sockglue.c) | |
950 | */ | |
951 | ||
5c3a0fd7 JP |
952 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
953 | char __user *optval, unsigned int optlen); | |
954 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
955 | char __user *optval, int __user *optlen); | |
956 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
957 | char __user *optval, unsigned int optlen); | |
958 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
959 | char __user *optval, int __user *optlen); | |
960 | ||
961 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); | |
82b276cd HFS |
962 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
963 | int addr_len); | |
5c3a0fd7 | 964 | |
85fbaa75 HFS |
965 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
966 | int *addr_len); | |
967 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
968 | int *addr_len); | |
5c3a0fd7 JP |
969 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
970 | u32 info, u8 *payload); | |
971 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
972 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
973 | ||
974 | int inet6_release(struct socket *sock); | |
975 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
976 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, | |
977 | int peer); | |
978 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
979 | ||
980 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
981 | struct sock *sk); |
982 | ||
1da177e4 LT |
983 | /* |
984 | * reassembly.c | |
985 | */ | |
90ddc4f0 ED |
986 | extern const struct proto_ops inet6_stream_ops; |
987 | extern const struct proto_ops inet6_dgram_ops; | |
20380731 | 988 | |
14c85021 ACM |
989 | struct group_source_req; |
990 | struct group_filter; | |
991 | ||
5c3a0fd7 JP |
992 | int ip6_mc_source(int add, int omode, struct sock *sk, |
993 | struct group_source_req *pgsr); | |
994 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
995 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
996 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
997 | |
998 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
999 | int ac6_proc_init(struct net *net); |
1000 | void ac6_proc_exit(struct net *net); | |
1001 | int raw6_proc_init(void); | |
1002 | void raw6_proc_exit(void); | |
1003 | int tcp6_proc_init(struct net *net); | |
1004 | void tcp6_proc_exit(struct net *net); | |
1005 | int udp6_proc_init(struct net *net); | |
1006 | void udp6_proc_exit(struct net *net); | |
1007 | int udplite6_proc_init(void); | |
1008 | void udplite6_proc_exit(void); | |
1009 | int ipv6_misc_proc_init(void); | |
1010 | void ipv6_misc_proc_exit(void); | |
1011 | int snmp6_register_dev(struct inet6_dev *idev); | |
1012 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1013 | |
7f7d9a6b | 1014 | #else |
6ab57e7e DL |
1015 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1016 | static inline void ac6_proc_exit(struct net *net) { } | |
1017 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1018 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1019 | #endif |
1da177e4 | 1020 | |
20380731 | 1021 | #ifdef CONFIG_SYSCTL |
9e8cda3b | 1022 | extern struct ctl_table ipv6_route_table_template[]; |
1da177e4 | 1023 | |
5c3a0fd7 JP |
1024 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1025 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1026 | int ipv6_sysctl_register(void); | |
1027 | void ipv6_sysctl_unregister(void); | |
20380731 | 1028 | #endif |
1da177e4 | 1029 | |
46a4dee0 MC |
1030 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1031 | const struct in6_addr *addr); | |
46a4dee0 MC |
1032 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1033 | const struct in6_addr *addr); | |
20380731 | 1034 | #endif /* _NET_IPV6_H */ |