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Commit | Line | Data |
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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> |
0aeea21a | 19 | #include <linux/refcount.h> |
20283d84 | 20 | #include <net/if_inet6.h> |
1da177e4 LT |
21 | #include <net/ndisc.h> |
22 | #include <net/flow.h> | |
1bd758eb | 23 | #include <net/flow_dissector.h> |
1da177e4 LT |
24 | #include <net/snmp.h> |
25 | ||
26 | #define SIN6_LEN_RFC2133 24 | |
27 | ||
28 | #define IPV6_MAXPLEN 65535 | |
29 | ||
30 | /* | |
31 | * NextHeader field of IPv6 header | |
32 | */ | |
33 | ||
34 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ | |
35 | #define NEXTHDR_TCP 6 /* TCP segment. */ | |
36 | #define NEXTHDR_UDP 17 /* UDP message. */ | |
37 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ | |
38 | #define NEXTHDR_ROUTING 43 /* Routing header. */ | |
39 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ | |
c12b395a | 40 | #define NEXTHDR_GRE 47 /* GRE header. */ |
1da177e4 LT |
41 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
42 | #define NEXTHDR_AUTH 51 /* Authentication header. */ | |
43 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ | |
44 | #define NEXTHDR_NONE 59 /* No next header */ | |
45 | #define NEXTHDR_DEST 60 /* Destination options header. */ | |
280c571e | 46 | #define NEXTHDR_SCTP 132 /* SCTP message. */ |
2b741653 | 47 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
1da177e4 LT |
48 | |
49 | #define NEXTHDR_MAX 255 | |
50 | ||
1da177e4 LT |
51 | #define IPV6_DEFAULT_HOPLIMIT 64 |
52 | #define IPV6_DEFAULT_MCASTHOPS 1 | |
53 | ||
47d3d7ac TH |
54 | /* Limits on Hop-by-Hop and Destination options. |
55 | * | |
56 | * Per RFC8200 there is no limit on the maximum number or lengths of options in | |
57 | * Hop-by-Hop or Destination options other then the packet must fit in an MTU. | |
58 | * We allow configurable limits in order to mitigate potential denial of | |
59 | * service attacks. | |
60 | * | |
61 | * There are three limits that may be set: | |
62 | * - Limit the number of options in a Hop-by-Hop or Destination options | |
63 | * extension header | |
64 | * - Limit the byte length of a Hop-by-Hop or Destination options extension | |
65 | * header | |
66 | * - Disallow unknown options | |
67 | * | |
68 | * The limits are expressed in corresponding sysctls: | |
69 | * | |
70 | * ipv6.sysctl.max_dst_opts_cnt | |
71 | * ipv6.sysctl.max_hbh_opts_cnt | |
72 | * ipv6.sysctl.max_dst_opts_len | |
73 | * ipv6.sysctl.max_hbh_opts_len | |
74 | * | |
75 | * max_*_opts_cnt is the number of TLVs that are allowed for Destination | |
76 | * options or Hop-by-Hop options. If the number is less than zero then unknown | |
77 | * TLVs are disallowed and the number of known options that are allowed is the | |
78 | * absolute value. Setting the value to INT_MAX indicates no limit. | |
79 | * | |
80 | * max_*_opts_len is the length limit in bytes of a Destination or | |
81 | * Hop-by-Hop options extension header. Setting the value to INT_MAX | |
82 | * indicates no length limit. | |
83 | * | |
84 | * If a limit is exceeded when processing an extension header the packet is | |
85 | * silently discarded. | |
86 | */ | |
87 | ||
88 | /* Default limits for Hop-by-Hop and Destination options */ | |
89 | #define IP6_DEFAULT_MAX_DST_OPTS_CNT 8 | |
90 | #define IP6_DEFAULT_MAX_HBH_OPTS_CNT 8 | |
91 | #define IP6_DEFAULT_MAX_DST_OPTS_LEN INT_MAX /* No limit */ | |
92 | #define IP6_DEFAULT_MAX_HBH_OPTS_LEN INT_MAX /* No limit */ | |
93 | ||
1da177e4 LT |
94 | /* |
95 | * Addr type | |
96 | * | |
97 | * type - unicast | multicast | |
98 | * scope - local | site | global | |
99 | * v4 - compat | |
100 | * v4mapped | |
101 | * any | |
102 | * loopback | |
103 | */ | |
104 | ||
105 | #define IPV6_ADDR_ANY 0x0000U | |
106 | ||
107 | #define IPV6_ADDR_UNICAST 0x0001U | |
108 | #define IPV6_ADDR_MULTICAST 0x0002U | |
109 | ||
110 | #define IPV6_ADDR_LOOPBACK 0x0010U | |
111 | #define IPV6_ADDR_LINKLOCAL 0x0020U | |
112 | #define IPV6_ADDR_SITELOCAL 0x0040U | |
113 | ||
114 | #define IPV6_ADDR_COMPATv4 0x0080U | |
115 | ||
116 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U | |
117 | ||
118 | #define IPV6_ADDR_MAPPED 0x1000U | |
1da177e4 LT |
119 | |
120 | /* | |
121 | * Addr scopes | |
122 | */ | |
1da177e4 LT |
123 | #define IPV6_ADDR_MC_SCOPE(a) \ |
124 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ | |
125 | #define __IPV6_ADDR_SCOPE_INVALID -1 | |
1da177e4 LT |
126 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
127 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 | |
128 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 | |
129 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 | |
130 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e | |
131 | ||
5ced1339 LL |
132 | /* |
133 | * Addr flags | |
134 | */ | |
5ced1339 LL |
135 | #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ |
136 | ((a)->s6_addr[1] & 0x10) | |
137 | #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ | |
138 | ((a)->s6_addr[1] & 0x20) | |
139 | #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ | |
140 | ((a)->s6_addr[1] & 0x40) | |
5ced1339 | 141 | |
1da177e4 LT |
142 | /* |
143 | * fragmentation header | |
144 | */ | |
145 | ||
146 | struct frag_hdr { | |
44473a6b AV |
147 | __u8 nexthdr; |
148 | __u8 reserved; | |
149 | __be16 frag_off; | |
150 | __be32 identification; | |
1da177e4 LT |
151 | }; |
152 | ||
1431fb31 PD |
153 | #define IP6_MF 0x0001 |
154 | #define IP6_OFFSET 0xFFF8 | |
1da177e4 | 155 | |
e110861f LC |
156 | #define IP6_REPLY_MARK(net, mark) \ |
157 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) | |
158 | ||
1da177e4 LT |
159 | #include <net/sock.h> |
160 | ||
161 | /* sysctls */ | |
1da177e4 | 162 | extern int sysctl_mld_max_msf; |
2f711939 | 163 | extern int sysctl_mld_qrv; |
3d7cc2ba | 164 | |
13415e46 | 165 | #define _DEVINC(net, statname, mod, idev, field) \ |
14878f75 | 166 | ({ \ |
a11d206d YH |
167 | struct inet6_dev *_idev = (idev); \ |
168 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
169 | mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\ |
170 | mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\ | |
a11d206d | 171 | }) |
14878f75 | 172 | |
be281e55 | 173 | /* per device counters are atomic_long_t */ |
13415e46 | 174 | #define _DEVINCATOMIC(net, statname, mod, idev, field) \ |
be281e55 ED |
175 | ({ \ |
176 | struct inet6_dev *_idev = (idev); \ | |
177 | if (likely(_idev != NULL)) \ | |
178 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
13415e46 | 179 | mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\ |
be281e55 ED |
180 | }) |
181 | ||
2a24444f ED |
182 | /* per device and per net counters are atomic_long_t */ |
183 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
184 | ({ \ | |
185 | struct inet6_dev *_idev = (idev); \ | |
186 | if (likely(_idev != NULL)) \ | |
187 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
188 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
189 | }) | |
190 | ||
13415e46 | 191 | #define _DEVADD(net, statname, mod, idev, field, val) \ |
8e7999c4 PE |
192 | ({ \ |
193 | struct inet6_dev *_idev = (idev); \ | |
194 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
195 | mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \ |
196 | mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\ | |
8e7999c4 PE |
197 | }) |
198 | ||
13415e46 | 199 | #define _DEVUPD(net, statname, mod, idev, field, val) \ |
edf391ff NH |
200 | ({ \ |
201 | struct inet6_dev *_idev = (idev); \ | |
202 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
203 | mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \ |
204 | mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\ | |
edf391ff NH |
205 | }) |
206 | ||
14878f75 | 207 | /* MIBs */ |
14878f75 | 208 | |
087fe240 | 209 | #define IP6_INC_STATS(net, idev,field) \ |
13415e46 | 210 | _DEVINC(net, ipv6, , idev, field) |
1d015503 | 211 | #define __IP6_INC_STATS(net, idev,field) \ |
13415e46 | 212 | _DEVINC(net, ipv6, __, idev, field) |
edf391ff | 213 | #define IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 214 | _DEVADD(net, ipv6, , idev, field, val) |
1d015503 | 215 | #define __IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 216 | _DEVADD(net, ipv6, __, idev, field, val) |
edf391ff | 217 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 218 | _DEVUPD(net, ipv6, , idev, field, val) |
c2005eb0 | 219 | #define __IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 220 | _DEVUPD(net, ipv6, __, idev, field, val) |
087fe240 | 221 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 222 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
a16292a0 | 223 | #define __ICMP6_INC_STATS(net, idev, field) \ |
13415e46 | 224 | _DEVINCATOMIC(net, icmpv6, __, idev, field) |
087fe240 DL |
225 | |
226 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 227 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
f3832ed2 | 228 | #define ICMP6MSGIN_INC_STATS(net, idev, field) \ |
2a24444f | 229 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 230 | |
fd2c3ef7 | 231 | struct ip6_ra_chain { |
1da177e4 LT |
232 | struct ip6_ra_chain *next; |
233 | struct sock *sk; | |
234 | int sel; | |
235 | void (*destructor)(struct sock *); | |
236 | }; | |
237 | ||
238 | extern struct ip6_ra_chain *ip6_ra_chain; | |
239 | extern rwlock_t ip6_ra_lock; | |
240 | ||
241 | /* | |
242 | This structure is prepared by protocol, when parsing | |
243 | ancillary data and passed to IPv6. | |
244 | */ | |
245 | ||
fd2c3ef7 | 246 | struct ipv6_txoptions { |
0aeea21a | 247 | refcount_t refcnt; |
1da177e4 LT |
248 | /* Length of this structure */ |
249 | int tot_len; | |
250 | ||
251 | /* length of extension headers */ | |
252 | ||
253 | __u16 opt_flen; /* after fragment hdr */ | |
254 | __u16 opt_nflen; /* before fragment hdr */ | |
255 | ||
256 | struct ipv6_opt_hdr *hopopt; | |
257 | struct ipv6_opt_hdr *dst0opt; | |
258 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 259 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 260 | struct rcu_head rcu; |
1da177e4 LT |
261 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
262 | }; | |
263 | ||
fd2c3ef7 | 264 | struct ip6_flowlabel { |
7f0e44ac | 265 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 266 | __be32 label; |
db3459d1 | 267 | atomic_t users; |
1da177e4 LT |
268 | struct in6_addr dst; |
269 | struct ipv6_txoptions *opt; | |
1da177e4 | 270 | unsigned long linger; |
d3aedd5e | 271 | struct rcu_head rcu; |
1da177e4 | 272 | u8 share; |
4f82f457 EB |
273 | union { |
274 | struct pid *pid; | |
275 | kuid_t uid; | |
276 | } owner; | |
1da177e4 LT |
277 | unsigned long lastuse; |
278 | unsigned long expires; | |
60e8fbc4 | 279 | struct net *fl_net; |
1da177e4 LT |
280 | }; |
281 | ||
82a584b7 TH |
282 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
283 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
284 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
285 | ||
37cfee90 | 286 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 287 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 288 | |
fd2c3ef7 | 289 | struct ipv6_fl_socklist { |
7f0e44ac ED |
290 | struct ipv6_fl_socklist __rcu *next; |
291 | struct ip6_flowlabel *fl; | |
292 | struct rcu_head rcu; | |
1da177e4 LT |
293 | }; |
294 | ||
26879da5 WW |
295 | struct ipcm6_cookie { |
296 | __s16 hlimit; | |
297 | __s16 tclass; | |
298 | __s8 dontfrag; | |
299 | struct ipv6_txoptions *opt; | |
300 | }; | |
301 | ||
45f6fad8 ED |
302 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
303 | { | |
304 | struct ipv6_txoptions *opt; | |
305 | ||
306 | rcu_read_lock(); | |
307 | opt = rcu_dereference(np->opt); | |
e550785c | 308 | if (opt) { |
0aeea21a | 309 | if (!refcount_inc_not_zero(&opt->refcnt)) |
e550785c BP |
310 | opt = NULL; |
311 | else | |
312 | opt = rcu_pointer_handoff(opt); | |
313 | } | |
45f6fad8 ED |
314 | rcu_read_unlock(); |
315 | return opt; | |
316 | } | |
317 | ||
318 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
319 | { | |
0aeea21a | 320 | if (opt && refcount_dec_and_test(&opt->refcnt)) |
45f6fad8 ED |
321 | kfree_rcu(opt, rcu); |
322 | } | |
323 | ||
5c3a0fd7 JP |
324 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
325 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
326 | struct ip6_flowlabel *fl, | |
327 | struct ipv6_txoptions *fopt); | |
328 | void fl6_free_socklist(struct sock *sk); | |
329 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
330 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
331 | int flags); | |
5c3a0fd7 JP |
332 | int ip6_flowlabel_init(void); |
333 | void ip6_flowlabel_cleanup(void); | |
e9191ffb | 334 | bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np); |
1da177e4 LT |
335 | |
336 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
337 | { | |
338 | if (fl) | |
339 | atomic_dec(&fl->users); | |
340 | } | |
341 | ||
5c3a0fd7 | 342 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 343 | |
4e64b1ed JP |
344 | void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
345 | struct icmp6hdr *thdr, int len); | |
6d0bfe22 | 346 | |
5c3a0fd7 | 347 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 348 | |
5c3a0fd7 | 349 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 350 | |
5c3a0fd7 JP |
351 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
352 | struct ipv6_txoptions *opt); | |
353 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
354 | struct ipv6_txoptions *opt, | |
355 | int newtype, | |
356 | struct ipv6_opt_hdr __user *newopt, | |
357 | int newoptlen); | |
e67ae213 HD |
358 | struct ipv6_txoptions * |
359 | ipv6_renew_options_kern(struct sock *sk, | |
360 | struct ipv6_txoptions *opt, | |
361 | int newtype, | |
362 | struct ipv6_opt_hdr *newopt, | |
363 | int newoptlen); | |
df9890c3 YH |
364 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
365 | struct ipv6_txoptions *opt); | |
1da177e4 | 366 | |
a224772d ED |
367 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
368 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
369 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
370 | struct ipv6_txoptions *opt); | |
399c07de | 371 | |
aeaf6e9d SL |
372 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
373 | { | |
374 | /* If forwarding is enabled, RA are not accepted unless the special | |
375 | * hybrid mode (accept_ra=2) is enabled. | |
376 | */ | |
377 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
378 | idev->cnf.accept_ra; | |
379 | } | |
380 | ||
d4915c08 | 381 | #if IS_ENABLED(CONFIG_IPV6) |
d4915c08 AW |
382 | static inline int ip6_frag_mem(struct net *net) |
383 | { | |
d433673e | 384 | return sum_frag_mem_limit(&net->ipv6.frags); |
d4915c08 AW |
385 | } |
386 | #endif | |
1da177e4 | 387 | |
77a24c31 TH |
388 | #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ |
389 | #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ | |
9874c41c | 390 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 391 | |
5c3a0fd7 | 392 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
393 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
394 | { | |
395 | return __ipv6_addr_type(addr) & 0xffff; | |
396 | } | |
1da177e4 LT |
397 | |
398 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
399 | { | |
b1cacb68 YH |
400 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
401 | } | |
402 | ||
403 | static inline int __ipv6_addr_src_scope(int type) | |
404 | { | |
a02cec21 | 405 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
406 | } |
407 | ||
408 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
409 | { | |
410 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
411 | } |
412 | ||
b7ef213e HFS |
413 | static inline bool __ipv6_addr_needs_scope_id(int type) |
414 | { | |
415 | return type & IPV6_ADDR_LINKLOCAL || | |
416 | (type & IPV6_ADDR_MULTICAST && | |
417 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
418 | } | |
419 | ||
420 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
421 | { | |
422 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
423 | } | |
424 | ||
1da177e4 LT |
425 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
426 | { | |
db3459d1 | 427 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
428 | } |
429 | ||
1a203cb3 | 430 | static inline bool |
f2ffd9ee PM |
431 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
432 | const struct in6_addr *a2) | |
433 | { | |
1a203cb3 ED |
434 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
435 | const unsigned long *ul1 = (const unsigned long *)a1; | |
436 | const unsigned long *ulm = (const unsigned long *)m; | |
437 | const unsigned long *ul2 = (const unsigned long *)a2; | |
438 | ||
439 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
440 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
441 | #else | |
a02cec21 ED |
442 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
443 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
444 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
445 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 446 | #endif |
f2ffd9ee PM |
447 | } |
448 | ||
1da177e4 LT |
449 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
450 | const struct in6_addr *addr, | |
451 | int plen) | |
452 | { | |
453 | /* caller must guarantee 0 <= plen <= 128 */ | |
454 | int o = plen >> 3, | |
455 | b = plen & 0x7; | |
456 | ||
db3459d1 | 457 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 458 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 459 | if (b != 0) |
1da177e4 | 460 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
461 | } |
462 | ||
818f1f3e AA |
463 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
464 | const struct in6_addr *pfx, | |
465 | int plen) | |
466 | { | |
467 | /* caller must guarantee 0 <= plen <= 128 */ | |
468 | int o = plen >> 3, | |
469 | b = plen & 0x7; | |
470 | ||
471 | memcpy(addr->s6_addr, pfx, o); | |
472 | if (b != 0) { | |
473 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
474 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
475 | } | |
476 | } | |
477 | ||
5206c579 YH |
478 | static inline void __ipv6_addr_set_half(__be32 *addr, |
479 | __be32 wh, __be32 wl) | |
480 | { | |
481 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
482 | #if defined(__BIG_ENDIAN) | |
483 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
484 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
485 | return; | |
486 | } | |
487 | #elif defined(__LITTLE_ENDIAN) | |
488 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
489 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
490 | return; | |
491 | } | |
492 | #endif | |
493 | #endif | |
494 | addr[0] = wh; | |
495 | addr[1] = wl; | |
496 | } | |
497 | ||
1da177e4 | 498 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
499 | __be32 w1, __be32 w2, |
500 | __be32 w3, __be32 w4) | |
1da177e4 | 501 | { |
5206c579 YH |
502 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
503 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 504 | } |
1da177e4 | 505 | |
92113bfd ED |
506 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
507 | const struct in6_addr *a2) | |
1da177e4 | 508 | { |
1a203cb3 ED |
509 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
510 | const unsigned long *ul1 = (const unsigned long *)a1; | |
511 | const unsigned long *ul2 = (const unsigned long *)a2; | |
512 | ||
513 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
514 | #else | |
a02cec21 ED |
515 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
516 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
517 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
518 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 519 | #endif |
1da177e4 LT |
520 | } |
521 | ||
38675170 YH |
522 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
523 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
524 | const __be64 *a2, | |
525 | unsigned int len) | |
526 | { | |
512613d7 | 527 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
528 | return false; |
529 | return true; | |
530 | } | |
531 | ||
532 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
533 | const struct in6_addr *addr2, | |
534 | unsigned int prefixlen) | |
535 | { | |
536 | const __be64 *a1 = (const __be64 *)addr1; | |
537 | const __be64 *a2 = (const __be64 *)addr2; | |
538 | ||
539 | if (prefixlen >= 64) { | |
540 | if (a1[0] ^ a2[0]) | |
541 | return false; | |
542 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
543 | } | |
544 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
545 | } | |
546 | #else | |
2ef97332 YH |
547 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
548 | const struct in6_addr *addr2, | |
549 | unsigned int prefixlen) | |
1da177e4 | 550 | { |
2ef97332 YH |
551 | const __be32 *a1 = addr1->s6_addr32; |
552 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 553 | unsigned int pdw, pbi; |
1da177e4 LT |
554 | |
555 | /* check complete u32 in prefix */ | |
556 | pdw = prefixlen >> 5; | |
557 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 558 | return false; |
1da177e4 LT |
559 | |
560 | /* check incomplete u32 in prefix */ | |
561 | pbi = prefixlen & 0x1f; | |
562 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 563 | return false; |
1da177e4 | 564 | |
92113bfd | 565 | return true; |
1da177e4 | 566 | } |
38675170 | 567 | #endif |
1da177e4 | 568 | |
2588fe1d | 569 | struct inet_frag_queue; |
2588fe1d | 570 | |
0b5ccb2e PM |
571 | enum ip6_defrag_users { |
572 | IP6_DEFRAG_LOCAL_DELIVER, | |
573 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 574 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 575 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 576 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 577 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 578 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
579 | }; |
580 | ||
c6fda282 PE |
581 | struct ip6_create_arg { |
582 | __be32 id; | |
0b5ccb2e | 583 | u32 user; |
b71d1d42 ED |
584 | const struct in6_addr *src; |
585 | const struct in6_addr *dst; | |
264640fc | 586 | int iif; |
eec2e618 | 587 | u8 ecn; |
c6fda282 PE |
588 | }; |
589 | ||
36c77782 FW |
590 | void ip6_frag_init(struct inet_frag_queue *q, const void *a); |
591 | bool ip6_frag_match(const struct inet_frag_queue *q, const void *a); | |
c6fda282 | 592 | |
b836c99f AW |
593 | /* |
594 | * Equivalent of ipv4 struct ip | |
595 | */ | |
596 | struct frag_queue { | |
597 | struct inet_frag_queue q; | |
598 | ||
599 | __be32 id; /* fragment id */ | |
600 | u32 user; | |
601 | struct in6_addr saddr; | |
602 | struct in6_addr daddr; | |
603 | ||
604 | int iif; | |
605 | unsigned int csum; | |
606 | __u16 nhoffset; | |
eec2e618 | 607 | u8 ecn; |
b836c99f AW |
608 | }; |
609 | ||
610 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq, | |
611 | struct inet_frags *frags); | |
612 | ||
92113bfd | 613 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 614 | { |
1a203cb3 ED |
615 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
616 | const unsigned long *ul = (const unsigned long *)a; | |
617 | ||
618 | return (ul[0] | ul[1]) == 0UL; | |
619 | #else | |
a02cec21 ED |
620 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
621 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 622 | #endif |
1da177e4 LT |
623 | } |
624 | ||
ddbe5032 ED |
625 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
626 | { | |
627 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
628 | const unsigned long *ul = (const unsigned long *)a; | |
629 | unsigned long x = ul[0] ^ ul[1]; | |
630 | ||
631 | return (u32)(x ^ (x >> 32)); | |
632 | #else | |
633 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
634 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
635 | #endif | |
636 | } | |
637 | ||
08dcdbf6 | 638 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 639 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
640 | { |
641 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
642 | ||
643 | return jhash_3words(v, | |
644 | (__force u32)a->s6_addr32[2], | |
645 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 646 | initval); |
08dcdbf6 ED |
647 | } |
648 | ||
92113bfd | 649 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 650 | { |
e287656b | 651 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 652 | const __be64 *be = (const __be64 *)a; |
e287656b | 653 | |
1373a773 | 654 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 655 | #else |
a02cec21 | 656 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 657 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 658 | #endif |
f630e43a YH |
659 | } |
660 | ||
1373a773 JL |
661 | /* |
662 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
663 | * since all of the endian-annotated types are fixed size regardless of arch. | |
664 | */ | |
92113bfd | 665 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 666 | { |
a04d40b8 YH |
667 | return ( |
668 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 669 | *(unsigned long *)a | |
a04d40b8 | 670 | #else |
1373a773 | 671 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 672 | #endif |
1373a773 JL |
673 | (__force unsigned long)(a->s6_addr32[2] ^ |
674 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
675 | } |
676 | ||
99cd07a5 JMT |
677 | /* |
678 | * Check for a RFC 4843 ORCHID address | |
679 | * (Overlay Routable Cryptographic Hash Identifiers) | |
680 | */ | |
92113bfd | 681 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 682 | { |
a02cec21 | 683 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
684 | } |
685 | ||
5c98631c LC |
686 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
687 | { | |
688 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
689 | } | |
690 | ||
f15364bd AC |
691 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
692 | struct in6_addr *v4mapped) | |
693 | { | |
694 | ipv6_addr_set(v4mapped, | |
695 | 0, 0, | |
696 | htonl(0x0000FFFF), | |
697 | addr); | |
698 | } | |
699 | ||
971f359d YH |
700 | /* |
701 | * find the first different bit between two addresses | |
702 | * length of address must be a multiple of 32bits | |
703 | */ | |
9f2e7334 | 704 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 705 | { |
ef296f56 | 706 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
707 | int i; |
708 | ||
709 | addrlen >>= 2; | |
710 | ||
711 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
712 | __be32 xb = a1[i] ^ a2[i]; |
713 | if (xb) | |
d57b8fb8 | 714 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
715 | } |
716 | ||
717 | /* | |
718 | * we should *never* get to this point since that | |
719 | * would mean the addrs are equal | |
720 | * | |
721 | * However, we do get to it 8) And exacly, when | |
722 | * addresses are equal 8) | |
723 | * | |
724 | * ip route add 1111::/128 via ... | |
725 | * ip route add 1111::/64 via ... | |
726 | * and we are here. | |
727 | * | |
728 | * Ideally, this function should stop comparison | |
729 | * at prefix length. It does not, but it is still OK, | |
730 | * if returned value is greater than prefix length. | |
731 | * --ANK (980803) | |
732 | */ | |
a02cec21 | 733 | return addrlen << 5; |
971f359d YH |
734 | } |
735 | ||
9f2e7334 YH |
736 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
737 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
738 | { | |
739 | const __be64 *a1 = token1, *a2 = token2; | |
740 | int i; | |
741 | ||
742 | addrlen >>= 3; | |
743 | ||
744 | for (i = 0; i < addrlen; i++) { | |
745 | __be64 xb = a1[i] ^ a2[i]; | |
746 | if (xb) | |
747 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
748 | } | |
749 | ||
750 | return addrlen << 6; | |
751 | } | |
752 | #endif | |
753 | ||
754 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
755 | { | |
756 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
757 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
758 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
759 | #endif | |
760 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
761 | } | |
762 | ||
971f359d YH |
763 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
764 | { | |
765 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
766 | } | |
767 | ||
7f159867 ED |
768 | __be32 ipv6_select_ident(struct net *net, |
769 | const struct in6_addr *daddr, | |
770 | const struct in6_addr *saddr); | |
0c19f846 | 771 | __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 772 | |
5c3a0fd7 | 773 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 774 | |
5c98631c LC |
775 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
776 | struct dst_entry *dst) | |
777 | { | |
778 | int hlimit; | |
779 | ||
780 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
781 | hlimit = np->mcast_hops; | |
782 | else | |
783 | hlimit = np->hop_limit; | |
784 | if (hlimit < 0) | |
785 | hlimit = ip6_dst_hoplimit(dst); | |
786 | return hlimit; | |
787 | } | |
788 | ||
c3f83241 TH |
789 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
790 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
791 | * flow->v6addrs.dst = iph->daddr; | |
792 | */ | |
793 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
794 | const struct ipv6hdr *iph) | |
795 | { | |
796 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
797 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
798 | sizeof(flow->addrs.v6addrs.src)); | |
799 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
800 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
801 | } | |
802 | ||
a37934fc | 803 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 TH |
804 | |
805 | /* Sysctl settings for net ipv6.auto_flowlabels */ | |
806 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
807 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
808 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
809 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
810 | ||
811 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
812 | ||
b5677416 | 813 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 814 | |
cb1ce2ef | 815 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
816 | __be32 flowlabel, bool autolabel, |
817 | struct flowi6 *fl6) | |
cb1ce2ef | 818 | { |
42240901 | 819 | u32 hash; |
cb1ce2ef | 820 | |
90427ef5 DM |
821 | /* @flowlabel may include more than a flow label, eg, the traffic class. |
822 | * Here we want only the flow label value. | |
823 | */ | |
824 | flowlabel &= IPV6_FLOWLABEL_MASK; | |
825 | ||
42240901 TH |
826 | if (flowlabel || |
827 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
828 | (!autolabel && | |
829 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
830 | return flowlabel; | |
cb1ce2ef | 831 | |
42240901 | 832 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 833 | |
42240901 TH |
834 | /* Since this is being sent on the wire obfuscate hash a bit |
835 | * to minimize possbility that any useful information to an | |
836 | * attacker is leaked. Only lower 20 bits are relevant. | |
837 | */ | |
838 | rol32(hash, 16); | |
82a584b7 | 839 | |
42240901 TH |
840 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
841 | ||
842 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
843 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
844 | |
845 | return flowlabel; | |
846 | } | |
42240901 TH |
847 | |
848 | static inline int ip6_default_np_autolabel(struct net *net) | |
849 | { | |
850 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
851 | case IP6_AUTO_FLOW_LABEL_OFF: | |
852 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
853 | default: | |
854 | return 0; | |
855 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
856 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
857 | return 1; | |
858 | } | |
859 | } | |
a37934fc FF |
860 | #else |
861 | static inline void ip6_set_txhash(struct sock *sk) { } | |
862 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
863 | __be32 flowlabel, bool autolabel, |
864 | struct flowi6 *fl6) | |
a37934fc FF |
865 | { |
866 | return flowlabel; | |
867 | } | |
42240901 TH |
868 | static inline int ip6_default_np_autolabel(struct net *net) |
869 | { | |
870 | return 0; | |
871 | } | |
a37934fc FF |
872 | #endif |
873 | ||
cb1ce2ef | 874 | |
3e4e4c1f YH |
875 | /* |
876 | * Header manipulation | |
877 | */ | |
878 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
879 | __be32 flowlabel) | |
880 | { | |
07f623d3 | 881 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
882 | } |
883 | ||
6502ca52 YH |
884 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
885 | { | |
886 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
887 | } | |
888 | ||
3308de2b FF |
889 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
890 | { | |
891 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
892 | } | |
893 | ||
d76ed22b LR |
894 | static inline u8 ip6_tclass(__be32 flowinfo) |
895 | { | |
896 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
897 | } | |
eaa93bf4 DB |
898 | |
899 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
900 | { | |
901 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
902 | } | |
903 | ||
1da177e4 LT |
904 | /* |
905 | * Prototypes exported by ipv6 | |
906 | */ | |
907 | ||
908 | /* | |
909 | * rcv function (called from netdevice level) | |
910 | */ | |
911 | ||
5c3a0fd7 JP |
912 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
913 | struct packet_type *pt, struct net_device *orig_dev); | |
1da177e4 | 914 | |
0c4b51f0 | 915 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 916 | |
1da177e4 LT |
917 | /* |
918 | * upper-layer output functions | |
919 | */ | |
1c1e9d2b | 920 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
92e55f41 | 921 | __u32 mark, struct ipv6_txoptions *opt, int tclass); |
5c3a0fd7 JP |
922 | |
923 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
924 | ||
925 | int ip6_append_data(struct sock *sk, | |
926 | int getfrag(void *from, char *to, int offset, int len, | |
927 | int odd, struct sk_buff *skb), | |
26879da5 WW |
928 | void *from, int length, int transhdrlen, |
929 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, | |
930 | struct rt6_info *rt, unsigned int flags, | |
c14ac945 | 931 | const struct sockcm_cookie *sockc); |
5c3a0fd7 JP |
932 | |
933 | int ip6_push_pending_frames(struct sock *sk); | |
934 | ||
935 | void ip6_flush_pending_frames(struct sock *sk); | |
936 | ||
6422398c VY |
937 | int ip6_send_skb(struct sk_buff *skb); |
938 | ||
939 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
940 | struct inet_cork_full *cork, | |
941 | struct inet6_cork *v6_cork); | |
942 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
943 | int getfrag(void *from, char *to, int offset, | |
944 | int len, int odd, struct sk_buff *skb), | |
945 | void *from, int length, int transhdrlen, | |
26879da5 WW |
946 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, |
947 | struct rt6_info *rt, unsigned int flags, | |
c14ac945 | 948 | const struct sockcm_cookie *sockc); |
6422398c VY |
949 | |
950 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
951 | { | |
952 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
953 | &inet6_sk(sk)->cork); | |
954 | } | |
955 | ||
343d60aa RP |
956 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
957 | struct flowi6 *fl6); | |
3aef934f | 958 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 959 | const struct in6_addr *final_dst); |
5c3a0fd7 | 960 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 961 | const struct in6_addr *final_dst); |
5c3a0fd7 JP |
962 | struct dst_entry *ip6_blackhole_route(struct net *net, |
963 | struct dst_entry *orig_dst); | |
1da177e4 LT |
964 | |
965 | /* | |
966 | * skb processing functions | |
967 | */ | |
968 | ||
ede2059d | 969 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
970 | int ip6_forward(struct sk_buff *skb); |
971 | int ip6_input(struct sk_buff *skb); | |
972 | int ip6_mc_input(struct sk_buff *skb); | |
1da177e4 | 973 | |
cf91a99d | 974 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 975 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 976 | |
1da177e4 LT |
977 | /* |
978 | * Extension header (options) processing | |
979 | */ | |
980 | ||
5c3a0fd7 | 981 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
613fa3ca DL |
982 | u8 *proto, struct in6_addr **daddr_p, |
983 | struct in6_addr *saddr); | |
5c3a0fd7 JP |
984 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
985 | u8 *proto); | |
1da177e4 | 986 | |
5c3a0fd7 JP |
987 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
988 | __be16 *frag_offp); | |
1da177e4 | 989 | |
5c3a0fd7 | 990 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 991 | |
f8f62675 | 992 | enum { |
9195bb8e AA |
993 | IP6_FH_F_FRAG = (1 << 0), |
994 | IP6_FH_F_AUTH = (1 << 1), | |
995 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
996 | }; |
997 | ||
998 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
999 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
1000 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 1001 | |
0868383b | 1002 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 1003 | |
5c3a0fd7 JP |
1004 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
1005 | const struct ipv6_txoptions *opt, | |
1006 | struct in6_addr *orig); | |
20c59de2 | 1007 | |
1da177e4 LT |
1008 | /* |
1009 | * socket options (ipv6_sockglue.c) | |
1010 | */ | |
1011 | ||
5c3a0fd7 JP |
1012 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
1013 | char __user *optval, unsigned int optlen); | |
1014 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1015 | char __user *optval, int __user *optlen); | |
1016 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
1017 | char __user *optval, unsigned int optlen); | |
1018 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1019 | char __user *optval, int __user *optlen); | |
1020 | ||
0382a25a GN |
1021 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, |
1022 | int addr_len); | |
5c3a0fd7 | 1023 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
82b276cd HFS |
1024 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
1025 | int addr_len); | |
33c162a9 | 1026 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 1027 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 1028 | |
85fbaa75 HFS |
1029 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
1030 | int *addr_len); | |
1031 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
1032 | int *addr_len); | |
5c3a0fd7 JP |
1033 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1034 | u32 info, u8 *payload); | |
1035 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
1036 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1037 | ||
1038 | int inet6_release(struct socket *sock); | |
1039 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
1040 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, | |
1041 | int peer); | |
1042 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
1043 | ||
1044 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
1045 | struct sock *sk); |
1046 | ||
1da177e4 LT |
1047 | /* |
1048 | * reassembly.c | |
1049 | */ | |
90ddc4f0 ED |
1050 | extern const struct proto_ops inet6_stream_ops; |
1051 | extern const struct proto_ops inet6_dgram_ops; | |
77d4b1d3 | 1052 | extern const struct proto_ops inet6_sockraw_ops; |
20380731 | 1053 | |
14c85021 ACM |
1054 | struct group_source_req; |
1055 | struct group_filter; | |
1056 | ||
5c3a0fd7 JP |
1057 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1058 | struct group_source_req *pgsr); | |
1059 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
1060 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
1061 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
1062 | |
1063 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1064 | int ac6_proc_init(struct net *net); |
1065 | void ac6_proc_exit(struct net *net); | |
1066 | int raw6_proc_init(void); | |
1067 | void raw6_proc_exit(void); | |
1068 | int tcp6_proc_init(struct net *net); | |
1069 | void tcp6_proc_exit(struct net *net); | |
1070 | int udp6_proc_init(struct net *net); | |
1071 | void udp6_proc_exit(struct net *net); | |
1072 | int udplite6_proc_init(void); | |
1073 | void udplite6_proc_exit(void); | |
1074 | int ipv6_misc_proc_init(void); | |
1075 | void ipv6_misc_proc_exit(void); | |
1076 | int snmp6_register_dev(struct inet6_dev *idev); | |
1077 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1078 | |
7f7d9a6b | 1079 | #else |
6ab57e7e DL |
1080 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1081 | static inline void ac6_proc_exit(struct net *net) { } | |
1082 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1083 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1084 | #endif |
1da177e4 | 1085 | |
20380731 | 1086 | #ifdef CONFIG_SYSCTL |
9e8cda3b | 1087 | extern struct ctl_table ipv6_route_table_template[]; |
1da177e4 | 1088 | |
5c3a0fd7 JP |
1089 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1090 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1091 | int ipv6_sysctl_register(void); | |
1092 | void ipv6_sysctl_unregister(void); | |
20380731 | 1093 | #endif |
1da177e4 | 1094 | |
46a4dee0 MC |
1095 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1096 | const struct in6_addr *addr); | |
46a4dee0 MC |
1097 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1098 | const struct in6_addr *addr); | |
20380731 | 1099 | #endif /* _NET_IPV6_H */ |