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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * | |
4 | * Authors: | |
5 | * Pedro Roque <[email protected]> | |
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 | |
13415e46 | 124 | #define _DEVINC(net, statname, mod, idev, field) \ |
14878f75 | 125 | ({ \ |
a11d206d YH |
126 | struct inet6_dev *_idev = (idev); \ |
127 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
128 | mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\ |
129 | mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\ | |
a11d206d | 130 | }) |
14878f75 | 131 | |
be281e55 | 132 | /* per device counters are atomic_long_t */ |
13415e46 | 133 | #define _DEVINCATOMIC(net, statname, mod, idev, field) \ |
be281e55 ED |
134 | ({ \ |
135 | struct inet6_dev *_idev = (idev); \ | |
136 | if (likely(_idev != NULL)) \ | |
137 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
13415e46 | 138 | mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\ |
be281e55 ED |
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 | ||
13415e46 | 150 | #define _DEVADD(net, statname, mod, idev, field, val) \ |
8e7999c4 PE |
151 | ({ \ |
152 | struct inet6_dev *_idev = (idev); \ | |
153 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
154 | mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \ |
155 | mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\ | |
8e7999c4 PE |
156 | }) |
157 | ||
13415e46 | 158 | #define _DEVUPD(net, statname, mod, idev, field, val) \ |
edf391ff NH |
159 | ({ \ |
160 | struct inet6_dev *_idev = (idev); \ | |
161 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
162 | mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \ |
163 | mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\ | |
edf391ff NH |
164 | }) |
165 | ||
14878f75 | 166 | /* MIBs */ |
14878f75 | 167 | |
087fe240 | 168 | #define IP6_INC_STATS(net, idev,field) \ |
13415e46 | 169 | _DEVINC(net, ipv6, , idev, field) |
1d015503 | 170 | #define __IP6_INC_STATS(net, idev,field) \ |
13415e46 | 171 | _DEVINC(net, ipv6, __, idev, field) |
edf391ff | 172 | #define IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 173 | _DEVADD(net, ipv6, , idev, field, val) |
1d015503 | 174 | #define __IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 175 | _DEVADD(net, ipv6, __, idev, field, val) |
edf391ff | 176 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 177 | _DEVUPD(net, ipv6, , idev, field, val) |
c2005eb0 | 178 | #define __IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 179 | _DEVUPD(net, ipv6, __, idev, field, val) |
087fe240 | 180 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 181 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
a16292a0 | 182 | #define __ICMP6_INC_STATS(net, idev, field) \ |
13415e46 | 183 | _DEVINCATOMIC(net, icmpv6, __, idev, field) |
087fe240 DL |
184 | |
185 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 186 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
f3832ed2 | 187 | #define ICMP6MSGIN_INC_STATS(net, idev, field) \ |
2a24444f | 188 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 189 | |
fd2c3ef7 | 190 | struct ip6_ra_chain { |
1da177e4 LT |
191 | struct ip6_ra_chain *next; |
192 | struct sock *sk; | |
193 | int sel; | |
194 | void (*destructor)(struct sock *); | |
195 | }; | |
196 | ||
197 | extern struct ip6_ra_chain *ip6_ra_chain; | |
198 | extern rwlock_t ip6_ra_lock; | |
199 | ||
200 | /* | |
201 | This structure is prepared by protocol, when parsing | |
202 | ancillary data and passed to IPv6. | |
203 | */ | |
204 | ||
fd2c3ef7 | 205 | struct ipv6_txoptions { |
45f6fad8 | 206 | atomic_t refcnt; |
1da177e4 LT |
207 | /* Length of this structure */ |
208 | int tot_len; | |
209 | ||
210 | /* length of extension headers */ | |
211 | ||
212 | __u16 opt_flen; /* after fragment hdr */ | |
213 | __u16 opt_nflen; /* before fragment hdr */ | |
214 | ||
215 | struct ipv6_opt_hdr *hopopt; | |
216 | struct ipv6_opt_hdr *dst0opt; | |
217 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 218 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 219 | struct rcu_head rcu; |
1da177e4 LT |
220 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
221 | }; | |
222 | ||
fd2c3ef7 | 223 | struct ip6_flowlabel { |
7f0e44ac | 224 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 225 | __be32 label; |
db3459d1 | 226 | atomic_t users; |
1da177e4 LT |
227 | struct in6_addr dst; |
228 | struct ipv6_txoptions *opt; | |
1da177e4 | 229 | unsigned long linger; |
d3aedd5e | 230 | struct rcu_head rcu; |
1da177e4 | 231 | u8 share; |
4f82f457 EB |
232 | union { |
233 | struct pid *pid; | |
234 | kuid_t uid; | |
235 | } owner; | |
1da177e4 LT |
236 | unsigned long lastuse; |
237 | unsigned long expires; | |
60e8fbc4 | 238 | struct net *fl_net; |
1da177e4 LT |
239 | }; |
240 | ||
82a584b7 TH |
241 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
242 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
243 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
244 | ||
37cfee90 | 245 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 246 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 247 | |
fd2c3ef7 | 248 | struct ipv6_fl_socklist { |
7f0e44ac ED |
249 | struct ipv6_fl_socklist __rcu *next; |
250 | struct ip6_flowlabel *fl; | |
251 | struct rcu_head rcu; | |
1da177e4 LT |
252 | }; |
253 | ||
26879da5 WW |
254 | struct ipcm6_cookie { |
255 | __s16 hlimit; | |
256 | __s16 tclass; | |
257 | __s8 dontfrag; | |
258 | struct ipv6_txoptions *opt; | |
259 | }; | |
260 | ||
45f6fad8 ED |
261 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
262 | { | |
263 | struct ipv6_txoptions *opt; | |
264 | ||
265 | rcu_read_lock(); | |
266 | opt = rcu_dereference(np->opt); | |
e550785c BP |
267 | if (opt) { |
268 | if (!atomic_inc_not_zero(&opt->refcnt)) | |
269 | opt = NULL; | |
270 | else | |
271 | opt = rcu_pointer_handoff(opt); | |
272 | } | |
45f6fad8 ED |
273 | rcu_read_unlock(); |
274 | return opt; | |
275 | } | |
276 | ||
277 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
278 | { | |
279 | if (opt && atomic_dec_and_test(&opt->refcnt)) | |
280 | kfree_rcu(opt, rcu); | |
281 | } | |
282 | ||
5c3a0fd7 JP |
283 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
284 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
285 | struct ip6_flowlabel *fl, | |
286 | struct ipv6_txoptions *fopt); | |
287 | void fl6_free_socklist(struct sock *sk); | |
288 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
289 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
290 | int flags); | |
5c3a0fd7 JP |
291 | int ip6_flowlabel_init(void); |
292 | void ip6_flowlabel_cleanup(void); | |
1da177e4 LT |
293 | |
294 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
295 | { | |
296 | if (fl) | |
297 | atomic_dec(&fl->users); | |
298 | } | |
299 | ||
5c3a0fd7 | 300 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 301 | |
6d0bfe22 LC |
302 | int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
303 | struct icmp6hdr *thdr, int len); | |
304 | ||
5c3a0fd7 | 305 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 306 | |
5c3a0fd7 | 307 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 308 | |
5c3a0fd7 JP |
309 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
310 | struct ipv6_txoptions *opt); | |
311 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
312 | struct ipv6_txoptions *opt, | |
313 | int newtype, | |
314 | struct ipv6_opt_hdr __user *newopt, | |
315 | int newoptlen); | |
e67ae213 HD |
316 | struct ipv6_txoptions * |
317 | ipv6_renew_options_kern(struct sock *sk, | |
318 | struct ipv6_txoptions *opt, | |
319 | int newtype, | |
320 | struct ipv6_opt_hdr *newopt, | |
321 | int newoptlen); | |
df9890c3 YH |
322 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
323 | struct ipv6_txoptions *opt); | |
1da177e4 | 324 | |
a224772d ED |
325 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
326 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
327 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
328 | struct ipv6_txoptions *opt); | |
399c07de | 329 | |
aeaf6e9d SL |
330 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
331 | { | |
332 | /* If forwarding is enabled, RA are not accepted unless the special | |
333 | * hybrid mode (accept_ra=2) is enabled. | |
334 | */ | |
335 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
336 | idev->cnf.accept_ra; | |
337 | } | |
338 | ||
d4915c08 | 339 | #if IS_ENABLED(CONFIG_IPV6) |
d4915c08 AW |
340 | static inline int ip6_frag_mem(struct net *net) |
341 | { | |
d433673e | 342 | return sum_frag_mem_limit(&net->ipv6.frags); |
d4915c08 AW |
343 | } |
344 | #endif | |
1da177e4 | 345 | |
c2a93660 JDB |
346 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
347 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 348 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 349 | |
5c3a0fd7 | 350 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
351 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
352 | { | |
353 | return __ipv6_addr_type(addr) & 0xffff; | |
354 | } | |
1da177e4 LT |
355 | |
356 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
357 | { | |
b1cacb68 YH |
358 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
359 | } | |
360 | ||
361 | static inline int __ipv6_addr_src_scope(int type) | |
362 | { | |
a02cec21 | 363 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
364 | } |
365 | ||
366 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
367 | { | |
368 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
369 | } |
370 | ||
b7ef213e HFS |
371 | static inline bool __ipv6_addr_needs_scope_id(int type) |
372 | { | |
373 | return type & IPV6_ADDR_LINKLOCAL || | |
374 | (type & IPV6_ADDR_MULTICAST && | |
375 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
376 | } | |
377 | ||
378 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
379 | { | |
380 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
381 | } | |
382 | ||
1da177e4 LT |
383 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
384 | { | |
db3459d1 | 385 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
386 | } |
387 | ||
1a203cb3 | 388 | static inline bool |
f2ffd9ee PM |
389 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
390 | const struct in6_addr *a2) | |
391 | { | |
1a203cb3 ED |
392 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
393 | const unsigned long *ul1 = (const unsigned long *)a1; | |
394 | const unsigned long *ulm = (const unsigned long *)m; | |
395 | const unsigned long *ul2 = (const unsigned long *)a2; | |
396 | ||
397 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
398 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
399 | #else | |
a02cec21 ED |
400 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
401 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
402 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
403 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 404 | #endif |
f2ffd9ee PM |
405 | } |
406 | ||
1da177e4 LT |
407 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
408 | const struct in6_addr *addr, | |
409 | int plen) | |
410 | { | |
411 | /* caller must guarantee 0 <= plen <= 128 */ | |
412 | int o = plen >> 3, | |
413 | b = plen & 0x7; | |
414 | ||
db3459d1 | 415 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 416 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 417 | if (b != 0) |
1da177e4 | 418 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
419 | } |
420 | ||
818f1f3e AA |
421 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
422 | const struct in6_addr *pfx, | |
423 | int plen) | |
424 | { | |
425 | /* caller must guarantee 0 <= plen <= 128 */ | |
426 | int o = plen >> 3, | |
427 | b = plen & 0x7; | |
428 | ||
429 | memcpy(addr->s6_addr, pfx, o); | |
430 | if (b != 0) { | |
431 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
432 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
433 | } | |
434 | } | |
435 | ||
5206c579 YH |
436 | static inline void __ipv6_addr_set_half(__be32 *addr, |
437 | __be32 wh, __be32 wl) | |
438 | { | |
439 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
440 | #if defined(__BIG_ENDIAN) | |
441 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
442 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
443 | return; | |
444 | } | |
445 | #elif defined(__LITTLE_ENDIAN) | |
446 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
447 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
448 | return; | |
449 | } | |
450 | #endif | |
451 | #endif | |
452 | addr[0] = wh; | |
453 | addr[1] = wl; | |
454 | } | |
455 | ||
1da177e4 | 456 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
457 | __be32 w1, __be32 w2, |
458 | __be32 w3, __be32 w4) | |
1da177e4 | 459 | { |
5206c579 YH |
460 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
461 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 462 | } |
1da177e4 | 463 | |
92113bfd ED |
464 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
465 | const struct in6_addr *a2) | |
1da177e4 | 466 | { |
1a203cb3 ED |
467 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
468 | const unsigned long *ul1 = (const unsigned long *)a1; | |
469 | const unsigned long *ul2 = (const unsigned long *)a2; | |
470 | ||
471 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
472 | #else | |
a02cec21 ED |
473 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
474 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
475 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
476 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 477 | #endif |
1da177e4 LT |
478 | } |
479 | ||
38675170 YH |
480 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
481 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
482 | const __be64 *a2, | |
483 | unsigned int len) | |
484 | { | |
512613d7 | 485 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
486 | return false; |
487 | return true; | |
488 | } | |
489 | ||
490 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
491 | const struct in6_addr *addr2, | |
492 | unsigned int prefixlen) | |
493 | { | |
494 | const __be64 *a1 = (const __be64 *)addr1; | |
495 | const __be64 *a2 = (const __be64 *)addr2; | |
496 | ||
497 | if (prefixlen >= 64) { | |
498 | if (a1[0] ^ a2[0]) | |
499 | return false; | |
500 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
501 | } | |
502 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
503 | } | |
504 | #else | |
2ef97332 YH |
505 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
506 | const struct in6_addr *addr2, | |
507 | unsigned int prefixlen) | |
1da177e4 | 508 | { |
2ef97332 YH |
509 | const __be32 *a1 = addr1->s6_addr32; |
510 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 511 | unsigned int pdw, pbi; |
1da177e4 LT |
512 | |
513 | /* check complete u32 in prefix */ | |
514 | pdw = prefixlen >> 5; | |
515 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 516 | return false; |
1da177e4 LT |
517 | |
518 | /* check incomplete u32 in prefix */ | |
519 | pbi = prefixlen & 0x1f; | |
520 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 521 | return false; |
1da177e4 | 522 | |
92113bfd | 523 | return true; |
1da177e4 | 524 | } |
38675170 | 525 | #endif |
1da177e4 | 526 | |
2588fe1d | 527 | struct inet_frag_queue; |
2588fe1d | 528 | |
0b5ccb2e PM |
529 | enum ip6_defrag_users { |
530 | IP6_DEFRAG_LOCAL_DELIVER, | |
531 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 532 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 533 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 534 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 535 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 536 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
537 | }; |
538 | ||
c6fda282 PE |
539 | struct ip6_create_arg { |
540 | __be32 id; | |
0b5ccb2e | 541 | u32 user; |
b71d1d42 ED |
542 | const struct in6_addr *src; |
543 | const struct in6_addr *dst; | |
264640fc | 544 | int iif; |
eec2e618 | 545 | u8 ecn; |
c6fda282 PE |
546 | }; |
547 | ||
36c77782 FW |
548 | void ip6_frag_init(struct inet_frag_queue *q, const void *a); |
549 | bool ip6_frag_match(const struct inet_frag_queue *q, const void *a); | |
c6fda282 | 550 | |
b836c99f AW |
551 | /* |
552 | * Equivalent of ipv4 struct ip | |
553 | */ | |
554 | struct frag_queue { | |
555 | struct inet_frag_queue q; | |
556 | ||
557 | __be32 id; /* fragment id */ | |
558 | u32 user; | |
559 | struct in6_addr saddr; | |
560 | struct in6_addr daddr; | |
561 | ||
562 | int iif; | |
563 | unsigned int csum; | |
564 | __u16 nhoffset; | |
eec2e618 | 565 | u8 ecn; |
b836c99f AW |
566 | }; |
567 | ||
568 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq, | |
569 | struct inet_frags *frags); | |
570 | ||
92113bfd | 571 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 572 | { |
1a203cb3 ED |
573 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
574 | const unsigned long *ul = (const unsigned long *)a; | |
575 | ||
576 | return (ul[0] | ul[1]) == 0UL; | |
577 | #else | |
a02cec21 ED |
578 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
579 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 580 | #endif |
1da177e4 LT |
581 | } |
582 | ||
ddbe5032 ED |
583 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
584 | { | |
585 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
586 | const unsigned long *ul = (const unsigned long *)a; | |
587 | unsigned long x = ul[0] ^ ul[1]; | |
588 | ||
589 | return (u32)(x ^ (x >> 32)); | |
590 | #else | |
591 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
592 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
593 | #endif | |
594 | } | |
595 | ||
08dcdbf6 | 596 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 597 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
598 | { |
599 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
600 | ||
601 | return jhash_3words(v, | |
602 | (__force u32)a->s6_addr32[2], | |
603 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 604 | initval); |
08dcdbf6 ED |
605 | } |
606 | ||
92113bfd | 607 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 608 | { |
e287656b | 609 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 610 | const __be64 *be = (const __be64 *)a; |
e287656b | 611 | |
1373a773 | 612 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 613 | #else |
a02cec21 | 614 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 615 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 616 | #endif |
f630e43a YH |
617 | } |
618 | ||
1373a773 JL |
619 | /* |
620 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
621 | * since all of the endian-annotated types are fixed size regardless of arch. | |
622 | */ | |
92113bfd | 623 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 624 | { |
a04d40b8 YH |
625 | return ( |
626 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 627 | *(unsigned long *)a | |
a04d40b8 | 628 | #else |
1373a773 | 629 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 630 | #endif |
1373a773 JL |
631 | (__force unsigned long)(a->s6_addr32[2] ^ |
632 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
633 | } |
634 | ||
99cd07a5 JMT |
635 | /* |
636 | * Check for a RFC 4843 ORCHID address | |
637 | * (Overlay Routable Cryptographic Hash Identifiers) | |
638 | */ | |
92113bfd | 639 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 640 | { |
a02cec21 | 641 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
642 | } |
643 | ||
5c98631c LC |
644 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
645 | { | |
646 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
647 | } | |
648 | ||
f15364bd AC |
649 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
650 | struct in6_addr *v4mapped) | |
651 | { | |
652 | ipv6_addr_set(v4mapped, | |
653 | 0, 0, | |
654 | htonl(0x0000FFFF), | |
655 | addr); | |
656 | } | |
657 | ||
971f359d YH |
658 | /* |
659 | * find the first different bit between two addresses | |
660 | * length of address must be a multiple of 32bits | |
661 | */ | |
9f2e7334 | 662 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 663 | { |
ef296f56 | 664 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
665 | int i; |
666 | ||
667 | addrlen >>= 2; | |
668 | ||
669 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
670 | __be32 xb = a1[i] ^ a2[i]; |
671 | if (xb) | |
d57b8fb8 | 672 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
673 | } |
674 | ||
675 | /* | |
676 | * we should *never* get to this point since that | |
677 | * would mean the addrs are equal | |
678 | * | |
679 | * However, we do get to it 8) And exacly, when | |
680 | * addresses are equal 8) | |
681 | * | |
682 | * ip route add 1111::/128 via ... | |
683 | * ip route add 1111::/64 via ... | |
684 | * and we are here. | |
685 | * | |
686 | * Ideally, this function should stop comparison | |
687 | * at prefix length. It does not, but it is still OK, | |
688 | * if returned value is greater than prefix length. | |
689 | * --ANK (980803) | |
690 | */ | |
a02cec21 | 691 | return addrlen << 5; |
971f359d YH |
692 | } |
693 | ||
9f2e7334 YH |
694 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
695 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
696 | { | |
697 | const __be64 *a1 = token1, *a2 = token2; | |
698 | int i; | |
699 | ||
700 | addrlen >>= 3; | |
701 | ||
702 | for (i = 0; i < addrlen; i++) { | |
703 | __be64 xb = a1[i] ^ a2[i]; | |
704 | if (xb) | |
705 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
706 | } | |
707 | ||
708 | return addrlen << 6; | |
709 | } | |
710 | #endif | |
711 | ||
712 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
713 | { | |
714 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
715 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
716 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
717 | #endif | |
718 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
719 | } | |
720 | ||
971f359d YH |
721 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
722 | { | |
723 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
724 | } | |
725 | ||
7f159867 ED |
726 | __be32 ipv6_select_ident(struct net *net, |
727 | const struct in6_addr *daddr, | |
728 | const struct in6_addr *saddr); | |
5a352dd0 | 729 | void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 730 | |
5c3a0fd7 | 731 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 732 | |
5c98631c LC |
733 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
734 | struct dst_entry *dst) | |
735 | { | |
736 | int hlimit; | |
737 | ||
738 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
739 | hlimit = np->mcast_hops; | |
740 | else | |
741 | hlimit = np->hop_limit; | |
742 | if (hlimit < 0) | |
743 | hlimit = ip6_dst_hoplimit(dst); | |
744 | return hlimit; | |
745 | } | |
746 | ||
c3f83241 TH |
747 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
748 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
749 | * flow->v6addrs.dst = iph->daddr; | |
750 | */ | |
751 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
752 | const struct ipv6hdr *iph) | |
753 | { | |
754 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
755 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
756 | sizeof(flow->addrs.v6addrs.src)); | |
757 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
758 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
759 | } | |
760 | ||
a37934fc | 761 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 TH |
762 | |
763 | /* Sysctl settings for net ipv6.auto_flowlabels */ | |
764 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
765 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
766 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
767 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
768 | ||
769 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
770 | ||
b5677416 | 771 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 772 | |
cb1ce2ef | 773 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
774 | __be32 flowlabel, bool autolabel, |
775 | struct flowi6 *fl6) | |
cb1ce2ef | 776 | { |
42240901 | 777 | u32 hash; |
cb1ce2ef | 778 | |
42240901 TH |
779 | if (flowlabel || |
780 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
781 | (!autolabel && | |
782 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
783 | return flowlabel; | |
cb1ce2ef | 784 | |
42240901 | 785 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 786 | |
42240901 TH |
787 | /* Since this is being sent on the wire obfuscate hash a bit |
788 | * to minimize possbility that any useful information to an | |
789 | * attacker is leaked. Only lower 20 bits are relevant. | |
790 | */ | |
791 | rol32(hash, 16); | |
82a584b7 | 792 | |
42240901 TH |
793 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
794 | ||
795 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
796 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
797 | |
798 | return flowlabel; | |
799 | } | |
42240901 TH |
800 | |
801 | static inline int ip6_default_np_autolabel(struct net *net) | |
802 | { | |
803 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
804 | case IP6_AUTO_FLOW_LABEL_OFF: | |
805 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
806 | default: | |
807 | return 0; | |
808 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
809 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
810 | return 1; | |
811 | } | |
812 | } | |
a37934fc FF |
813 | #else |
814 | static inline void ip6_set_txhash(struct sock *sk) { } | |
815 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
816 | __be32 flowlabel, bool autolabel, |
817 | struct flowi6 *fl6) | |
a37934fc FF |
818 | { |
819 | return flowlabel; | |
820 | } | |
42240901 TH |
821 | static inline int ip6_default_np_autolabel(struct net *net) |
822 | { | |
823 | return 0; | |
824 | } | |
a37934fc FF |
825 | #endif |
826 | ||
cb1ce2ef | 827 | |
3e4e4c1f YH |
828 | /* |
829 | * Header manipulation | |
830 | */ | |
831 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
832 | __be32 flowlabel) | |
833 | { | |
07f623d3 | 834 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
835 | } |
836 | ||
6502ca52 YH |
837 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
838 | { | |
839 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
840 | } | |
841 | ||
3308de2b FF |
842 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
843 | { | |
844 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
845 | } | |
846 | ||
d76ed22b LR |
847 | static inline u8 ip6_tclass(__be32 flowinfo) |
848 | { | |
849 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
850 | } | |
eaa93bf4 DB |
851 | |
852 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
853 | { | |
854 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
855 | } | |
856 | ||
1da177e4 LT |
857 | /* |
858 | * Prototypes exported by ipv6 | |
859 | */ | |
860 | ||
861 | /* | |
862 | * rcv function (called from netdevice level) | |
863 | */ | |
864 | ||
5c3a0fd7 JP |
865 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
866 | struct packet_type *pt, struct net_device *orig_dev); | |
1da177e4 | 867 | |
0c4b51f0 | 868 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 869 | |
1da177e4 LT |
870 | /* |
871 | * upper-layer output functions | |
872 | */ | |
1c1e9d2b | 873 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
5c3a0fd7 JP |
874 | struct ipv6_txoptions *opt, int tclass); |
875 | ||
876 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
877 | ||
878 | int ip6_append_data(struct sock *sk, | |
879 | int getfrag(void *from, char *to, int offset, int len, | |
880 | int odd, struct sk_buff *skb), | |
26879da5 WW |
881 | void *from, int length, int transhdrlen, |
882 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, | |
883 | struct rt6_info *rt, unsigned int flags, | |
c14ac945 | 884 | const struct sockcm_cookie *sockc); |
5c3a0fd7 JP |
885 | |
886 | int ip6_push_pending_frames(struct sock *sk); | |
887 | ||
888 | void ip6_flush_pending_frames(struct sock *sk); | |
889 | ||
6422398c VY |
890 | int ip6_send_skb(struct sk_buff *skb); |
891 | ||
892 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
893 | struct inet_cork_full *cork, | |
894 | struct inet6_cork *v6_cork); | |
895 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
896 | int getfrag(void *from, char *to, int offset, | |
897 | int len, int odd, struct sk_buff *skb), | |
898 | void *from, int length, int transhdrlen, | |
26879da5 WW |
899 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, |
900 | struct rt6_info *rt, unsigned int flags, | |
c14ac945 | 901 | const struct sockcm_cookie *sockc); |
6422398c VY |
902 | |
903 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
904 | { | |
905 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
906 | &inet6_sk(sk)->cork); | |
907 | } | |
908 | ||
343d60aa RP |
909 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
910 | struct flowi6 *fl6); | |
3aef934f | 911 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 912 | const struct in6_addr *final_dst); |
5c3a0fd7 | 913 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 914 | const struct in6_addr *final_dst); |
5c3a0fd7 JP |
915 | struct dst_entry *ip6_blackhole_route(struct net *net, |
916 | struct dst_entry *orig_dst); | |
1da177e4 LT |
917 | |
918 | /* | |
919 | * skb processing functions | |
920 | */ | |
921 | ||
ede2059d | 922 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
923 | int ip6_forward(struct sk_buff *skb); |
924 | int ip6_input(struct sk_buff *skb); | |
925 | int ip6_mc_input(struct sk_buff *skb); | |
1da177e4 | 926 | |
cf91a99d | 927 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 928 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 929 | |
1da177e4 LT |
930 | /* |
931 | * Extension header (options) processing | |
932 | */ | |
933 | ||
5c3a0fd7 JP |
934 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
935 | u8 *proto, struct in6_addr **daddr_p); | |
936 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, | |
937 | u8 *proto); | |
1da177e4 | 938 | |
5c3a0fd7 JP |
939 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
940 | __be16 *frag_offp); | |
1da177e4 | 941 | |
5c3a0fd7 | 942 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 943 | |
f8f62675 | 944 | enum { |
9195bb8e AA |
945 | IP6_FH_F_FRAG = (1 << 0), |
946 | IP6_FH_F_AUTH = (1 << 1), | |
947 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
948 | }; |
949 | ||
950 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
951 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
952 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 953 | |
0868383b | 954 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 955 | |
5c3a0fd7 JP |
956 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
957 | const struct ipv6_txoptions *opt, | |
958 | struct in6_addr *orig); | |
20c59de2 | 959 | |
1da177e4 LT |
960 | /* |
961 | * socket options (ipv6_sockglue.c) | |
962 | */ | |
963 | ||
5c3a0fd7 JP |
964 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
965 | char __user *optval, unsigned int optlen); | |
966 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
967 | char __user *optval, int __user *optlen); | |
968 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
969 | char __user *optval, unsigned int optlen); | |
970 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
971 | char __user *optval, int __user *optlen); | |
972 | ||
973 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); | |
82b276cd HFS |
974 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
975 | int addr_len); | |
33c162a9 | 976 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 977 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 978 | |
85fbaa75 HFS |
979 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
980 | int *addr_len); | |
981 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
982 | int *addr_len); | |
5c3a0fd7 JP |
983 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
984 | u32 info, u8 *payload); | |
985 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
986 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
987 | ||
988 | int inet6_release(struct socket *sock); | |
989 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
990 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, | |
991 | int peer); | |
992 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
993 | ||
994 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
995 | struct sock *sk); |
996 | ||
1da177e4 LT |
997 | /* |
998 | * reassembly.c | |
999 | */ | |
90ddc4f0 ED |
1000 | extern const struct proto_ops inet6_stream_ops; |
1001 | extern const struct proto_ops inet6_dgram_ops; | |
20380731 | 1002 | |
14c85021 ACM |
1003 | struct group_source_req; |
1004 | struct group_filter; | |
1005 | ||
5c3a0fd7 JP |
1006 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1007 | struct group_source_req *pgsr); | |
1008 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
1009 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
1010 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
1011 | |
1012 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1013 | int ac6_proc_init(struct net *net); |
1014 | void ac6_proc_exit(struct net *net); | |
1015 | int raw6_proc_init(void); | |
1016 | void raw6_proc_exit(void); | |
1017 | int tcp6_proc_init(struct net *net); | |
1018 | void tcp6_proc_exit(struct net *net); | |
1019 | int udp6_proc_init(struct net *net); | |
1020 | void udp6_proc_exit(struct net *net); | |
1021 | int udplite6_proc_init(void); | |
1022 | void udplite6_proc_exit(void); | |
1023 | int ipv6_misc_proc_init(void); | |
1024 | void ipv6_misc_proc_exit(void); | |
1025 | int snmp6_register_dev(struct inet6_dev *idev); | |
1026 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1027 | |
7f7d9a6b | 1028 | #else |
6ab57e7e DL |
1029 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1030 | static inline void ac6_proc_exit(struct net *net) { } | |
1031 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1032 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1033 | #endif |
1da177e4 | 1034 | |
20380731 | 1035 | #ifdef CONFIG_SYSCTL |
9e8cda3b | 1036 | extern struct ctl_table ipv6_route_table_template[]; |
1da177e4 | 1037 | |
5c3a0fd7 JP |
1038 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1039 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1040 | int ipv6_sysctl_register(void); | |
1041 | void ipv6_sysctl_unregister(void); | |
20380731 | 1042 | #endif |
1da177e4 | 1043 | |
46a4dee0 MC |
1044 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1045 | const struct in6_addr *addr); | |
46a4dee0 MC |
1046 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1047 | const struct in6_addr *addr); | |
20380731 | 1048 | #endif /* _NET_IPV6_H */ |