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> |
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 | 24 | #include <net/snmp.h> |
f0b1e64c | 25 | #include <net/netns/hash.h> |
1da177e4 LT |
26 | |
27 | #define SIN6_LEN_RFC2133 24 | |
28 | ||
29 | #define IPV6_MAXPLEN 65535 | |
30 | ||
31 | /* | |
32 | * NextHeader field of IPv6 header | |
33 | */ | |
34 | ||
35 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ | |
36 | #define NEXTHDR_TCP 6 /* TCP segment. */ | |
37 | #define NEXTHDR_UDP 17 /* UDP message. */ | |
38 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ | |
39 | #define NEXTHDR_ROUTING 43 /* Routing header. */ | |
40 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ | |
c12b395a | 41 | #define NEXTHDR_GRE 47 /* GRE header. */ |
1da177e4 LT |
42 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
43 | #define NEXTHDR_AUTH 51 /* Authentication header. */ | |
44 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ | |
45 | #define NEXTHDR_NONE 59 /* No next header */ | |
46 | #define NEXTHDR_DEST 60 /* Destination options header. */ | |
280c571e | 47 | #define NEXTHDR_SCTP 132 /* SCTP message. */ |
2b741653 | 48 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
1da177e4 LT |
49 | |
50 | #define NEXTHDR_MAX 255 | |
51 | ||
1da177e4 LT |
52 | #define IPV6_DEFAULT_HOPLIMIT 64 |
53 | #define IPV6_DEFAULT_MCASTHOPS 1 | |
54 | ||
47d3d7ac TH |
55 | /* Limits on Hop-by-Hop and Destination options. |
56 | * | |
57 | * Per RFC8200 there is no limit on the maximum number or lengths of options in | |
58 | * Hop-by-Hop or Destination options other then the packet must fit in an MTU. | |
59 | * We allow configurable limits in order to mitigate potential denial of | |
60 | * service attacks. | |
61 | * | |
62 | * There are three limits that may be set: | |
63 | * - Limit the number of options in a Hop-by-Hop or Destination options | |
64 | * extension header | |
65 | * - Limit the byte length of a Hop-by-Hop or Destination options extension | |
66 | * header | |
67 | * - Disallow unknown options | |
68 | * | |
69 | * The limits are expressed in corresponding sysctls: | |
70 | * | |
71 | * ipv6.sysctl.max_dst_opts_cnt | |
72 | * ipv6.sysctl.max_hbh_opts_cnt | |
73 | * ipv6.sysctl.max_dst_opts_len | |
74 | * ipv6.sysctl.max_hbh_opts_len | |
75 | * | |
76 | * max_*_opts_cnt is the number of TLVs that are allowed for Destination | |
77 | * options or Hop-by-Hop options. If the number is less than zero then unknown | |
78 | * TLVs are disallowed and the number of known options that are allowed is the | |
79 | * absolute value. Setting the value to INT_MAX indicates no limit. | |
80 | * | |
81 | * max_*_opts_len is the length limit in bytes of a Destination or | |
82 | * Hop-by-Hop options extension header. Setting the value to INT_MAX | |
83 | * indicates no length limit. | |
84 | * | |
85 | * If a limit is exceeded when processing an extension header the packet is | |
86 | * silently discarded. | |
87 | */ | |
88 | ||
89 | /* Default limits for Hop-by-Hop and Destination options */ | |
90 | #define IP6_DEFAULT_MAX_DST_OPTS_CNT 8 | |
91 | #define IP6_DEFAULT_MAX_HBH_OPTS_CNT 8 | |
92 | #define IP6_DEFAULT_MAX_DST_OPTS_LEN INT_MAX /* No limit */ | |
93 | #define IP6_DEFAULT_MAX_HBH_OPTS_LEN INT_MAX /* No limit */ | |
94 | ||
1da177e4 LT |
95 | /* |
96 | * Addr type | |
97 | * | |
98 | * type - unicast | multicast | |
99 | * scope - local | site | global | |
100 | * v4 - compat | |
101 | * v4mapped | |
102 | * any | |
103 | * loopback | |
104 | */ | |
105 | ||
106 | #define IPV6_ADDR_ANY 0x0000U | |
107 | ||
82695b30 SH |
108 | #define IPV6_ADDR_UNICAST 0x0001U |
109 | #define IPV6_ADDR_MULTICAST 0x0002U | |
1da177e4 LT |
110 | |
111 | #define IPV6_ADDR_LOOPBACK 0x0010U | |
112 | #define IPV6_ADDR_LINKLOCAL 0x0020U | |
113 | #define IPV6_ADDR_SITELOCAL 0x0040U | |
114 | ||
115 | #define IPV6_ADDR_COMPATv4 0x0080U | |
116 | ||
117 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U | |
118 | ||
119 | #define IPV6_ADDR_MAPPED 0x1000U | |
1da177e4 LT |
120 | |
121 | /* | |
122 | * Addr scopes | |
123 | */ | |
1da177e4 LT |
124 | #define IPV6_ADDR_MC_SCOPE(a) \ |
125 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ | |
126 | #define __IPV6_ADDR_SCOPE_INVALID -1 | |
1da177e4 LT |
127 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
128 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 | |
129 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 | |
130 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 | |
131 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e | |
132 | ||
5ced1339 LL |
133 | /* |
134 | * Addr flags | |
135 | */ | |
5ced1339 LL |
136 | #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ |
137 | ((a)->s6_addr[1] & 0x10) | |
138 | #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ | |
139 | ((a)->s6_addr[1] & 0x20) | |
140 | #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ | |
141 | ((a)->s6_addr[1] & 0x40) | |
5ced1339 | 142 | |
1da177e4 LT |
143 | /* |
144 | * fragmentation header | |
145 | */ | |
146 | ||
147 | struct frag_hdr { | |
44473a6b AV |
148 | __u8 nexthdr; |
149 | __u8 reserved; | |
150 | __be16 frag_off; | |
151 | __be32 identification; | |
1da177e4 LT |
152 | }; |
153 | ||
1431fb31 PD |
154 | #define IP6_MF 0x0001 |
155 | #define IP6_OFFSET 0xFFF8 | |
1da177e4 | 156 | |
e110861f LC |
157 | #define IP6_REPLY_MARK(net, mark) \ |
158 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) | |
159 | ||
1da177e4 LT |
160 | #include <net/sock.h> |
161 | ||
162 | /* sysctls */ | |
1da177e4 | 163 | extern int sysctl_mld_max_msf; |
2f711939 | 164 | extern int sysctl_mld_qrv; |
3d7cc2ba | 165 | |
13415e46 | 166 | #define _DEVINC(net, statname, mod, idev, field) \ |
14878f75 | 167 | ({ \ |
a11d206d YH |
168 | struct inet6_dev *_idev = (idev); \ |
169 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
170 | mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\ |
171 | mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\ | |
a11d206d | 172 | }) |
14878f75 | 173 | |
be281e55 | 174 | /* per device counters are atomic_long_t */ |
13415e46 | 175 | #define _DEVINCATOMIC(net, statname, mod, idev, field) \ |
be281e55 ED |
176 | ({ \ |
177 | struct inet6_dev *_idev = (idev); \ | |
178 | if (likely(_idev != NULL)) \ | |
179 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
13415e46 | 180 | mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\ |
be281e55 ED |
181 | }) |
182 | ||
2a24444f ED |
183 | /* per device and per net counters are atomic_long_t */ |
184 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
185 | ({ \ | |
186 | struct inet6_dev *_idev = (idev); \ | |
187 | if (likely(_idev != NULL)) \ | |
188 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
189 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
190 | }) | |
191 | ||
13415e46 | 192 | #define _DEVADD(net, statname, mod, idev, field, val) \ |
8e7999c4 PE |
193 | ({ \ |
194 | struct inet6_dev *_idev = (idev); \ | |
195 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
196 | mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \ |
197 | mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\ | |
8e7999c4 PE |
198 | }) |
199 | ||
13415e46 | 200 | #define _DEVUPD(net, statname, mod, idev, field, val) \ |
edf391ff NH |
201 | ({ \ |
202 | struct inet6_dev *_idev = (idev); \ | |
203 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
204 | mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \ |
205 | mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\ | |
edf391ff NH |
206 | }) |
207 | ||
14878f75 | 208 | /* MIBs */ |
14878f75 | 209 | |
087fe240 | 210 | #define IP6_INC_STATS(net, idev,field) \ |
13415e46 | 211 | _DEVINC(net, ipv6, , idev, field) |
1d015503 | 212 | #define __IP6_INC_STATS(net, idev,field) \ |
13415e46 | 213 | _DEVINC(net, ipv6, __, idev, field) |
edf391ff | 214 | #define IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 215 | _DEVADD(net, ipv6, , idev, field, val) |
1d015503 | 216 | #define __IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 217 | _DEVADD(net, ipv6, __, idev, field, val) |
edf391ff | 218 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 219 | _DEVUPD(net, ipv6, , idev, field, val) |
c2005eb0 | 220 | #define __IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 221 | _DEVUPD(net, ipv6, __, idev, field, val) |
087fe240 | 222 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 223 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
a16292a0 | 224 | #define __ICMP6_INC_STATS(net, idev, field) \ |
13415e46 | 225 | _DEVINCATOMIC(net, icmpv6, __, idev, field) |
087fe240 DL |
226 | |
227 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 228 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
f3832ed2 | 229 | #define ICMP6MSGIN_INC_STATS(net, idev, field) \ |
2a24444f | 230 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 231 | |
fd2c3ef7 | 232 | struct ip6_ra_chain { |
1da177e4 LT |
233 | struct ip6_ra_chain *next; |
234 | struct sock *sk; | |
235 | int sel; | |
236 | void (*destructor)(struct sock *); | |
237 | }; | |
238 | ||
239 | extern struct ip6_ra_chain *ip6_ra_chain; | |
240 | extern rwlock_t ip6_ra_lock; | |
241 | ||
242 | /* | |
243 | This structure is prepared by protocol, when parsing | |
244 | ancillary data and passed to IPv6. | |
245 | */ | |
246 | ||
fd2c3ef7 | 247 | struct ipv6_txoptions { |
0aeea21a | 248 | refcount_t refcnt; |
1da177e4 LT |
249 | /* Length of this structure */ |
250 | int tot_len; | |
251 | ||
252 | /* length of extension headers */ | |
253 | ||
254 | __u16 opt_flen; /* after fragment hdr */ | |
255 | __u16 opt_nflen; /* before fragment hdr */ | |
256 | ||
257 | struct ipv6_opt_hdr *hopopt; | |
258 | struct ipv6_opt_hdr *dst0opt; | |
259 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 260 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 261 | struct rcu_head rcu; |
1da177e4 LT |
262 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
263 | }; | |
264 | ||
fd2c3ef7 | 265 | struct ip6_flowlabel { |
7f0e44ac | 266 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 267 | __be32 label; |
db3459d1 | 268 | atomic_t users; |
1da177e4 LT |
269 | struct in6_addr dst; |
270 | struct ipv6_txoptions *opt; | |
1da177e4 | 271 | unsigned long linger; |
d3aedd5e | 272 | struct rcu_head rcu; |
1da177e4 | 273 | u8 share; |
4f82f457 EB |
274 | union { |
275 | struct pid *pid; | |
276 | kuid_t uid; | |
277 | } owner; | |
1da177e4 LT |
278 | unsigned long lastuse; |
279 | unsigned long expires; | |
60e8fbc4 | 280 | struct net *fl_net; |
1da177e4 LT |
281 | }; |
282 | ||
82a584b7 TH |
283 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
284 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
285 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
286 | ||
37cfee90 | 287 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 288 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 289 | |
fd2c3ef7 | 290 | struct ipv6_fl_socklist { |
7f0e44ac ED |
291 | struct ipv6_fl_socklist __rcu *next; |
292 | struct ip6_flowlabel *fl; | |
293 | struct rcu_head rcu; | |
1da177e4 LT |
294 | }; |
295 | ||
26879da5 | 296 | struct ipcm6_cookie { |
5fdaa88d | 297 | struct sockcm_cookie sockc; |
26879da5 WW |
298 | __s16 hlimit; |
299 | __s16 tclass; | |
300 | __s8 dontfrag; | |
301 | struct ipv6_txoptions *opt; | |
bec1f6f6 | 302 | __u16 gso_size; |
26879da5 WW |
303 | }; |
304 | ||
b515430a WB |
305 | static inline void ipcm6_init(struct ipcm6_cookie *ipc6) |
306 | { | |
307 | *ipc6 = (struct ipcm6_cookie) { | |
308 | .hlimit = -1, | |
309 | .tclass = -1, | |
310 | .dontfrag = -1, | |
311 | }; | |
312 | } | |
313 | ||
314 | static inline void ipcm6_init_sk(struct ipcm6_cookie *ipc6, | |
315 | const struct ipv6_pinfo *np) | |
316 | { | |
317 | *ipc6 = (struct ipcm6_cookie) { | |
318 | .hlimit = -1, | |
319 | .tclass = np->tclass, | |
320 | .dontfrag = np->dontfrag, | |
321 | }; | |
322 | } | |
323 | ||
45f6fad8 ED |
324 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
325 | { | |
326 | struct ipv6_txoptions *opt; | |
327 | ||
328 | rcu_read_lock(); | |
329 | opt = rcu_dereference(np->opt); | |
e550785c | 330 | if (opt) { |
0aeea21a | 331 | if (!refcount_inc_not_zero(&opt->refcnt)) |
e550785c BP |
332 | opt = NULL; |
333 | else | |
334 | opt = rcu_pointer_handoff(opt); | |
335 | } | |
45f6fad8 ED |
336 | rcu_read_unlock(); |
337 | return opt; | |
338 | } | |
339 | ||
340 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
341 | { | |
0aeea21a | 342 | if (opt && refcount_dec_and_test(&opt->refcnt)) |
45f6fad8 ED |
343 | kfree_rcu(opt, rcu); |
344 | } | |
345 | ||
5c3a0fd7 JP |
346 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
347 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
348 | struct ip6_flowlabel *fl, | |
349 | struct ipv6_txoptions *fopt); | |
350 | void fl6_free_socklist(struct sock *sk); | |
351 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
352 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
353 | int flags); | |
5c3a0fd7 JP |
354 | int ip6_flowlabel_init(void); |
355 | void ip6_flowlabel_cleanup(void); | |
e9191ffb | 356 | bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np); |
1da177e4 LT |
357 | |
358 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
359 | { | |
360 | if (fl) | |
361 | atomic_dec(&fl->users); | |
362 | } | |
363 | ||
5c3a0fd7 | 364 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 365 | |
4e64b1ed JP |
366 | void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
367 | struct icmp6hdr *thdr, int len); | |
6d0bfe22 | 368 | |
5c3a0fd7 | 369 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 370 | |
5c3a0fd7 | 371 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 372 | |
5c3a0fd7 JP |
373 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
374 | struct ipv6_txoptions *opt); | |
375 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
376 | struct ipv6_txoptions *opt, | |
377 | int newtype, | |
a9ba23d4 | 378 | struct ipv6_opt_hdr *newopt); |
df9890c3 YH |
379 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
380 | struct ipv6_txoptions *opt); | |
1da177e4 | 381 | |
a224772d ED |
382 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
383 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
384 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
385 | struct ipv6_txoptions *opt); | |
399c07de | 386 | |
aeaf6e9d SL |
387 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
388 | { | |
389 | /* If forwarding is enabled, RA are not accepted unless the special | |
390 | * hybrid mode (accept_ra=2) is enabled. | |
391 | */ | |
392 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
393 | idev->cnf.accept_ra; | |
394 | } | |
395 | ||
c2a93660 JDB |
396 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
397 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 398 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 399 | |
5c3a0fd7 | 400 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
401 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
402 | { | |
403 | return __ipv6_addr_type(addr) & 0xffff; | |
404 | } | |
1da177e4 LT |
405 | |
406 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
407 | { | |
b1cacb68 YH |
408 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
409 | } | |
410 | ||
411 | static inline int __ipv6_addr_src_scope(int type) | |
412 | { | |
a02cec21 | 413 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
414 | } |
415 | ||
416 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
417 | { | |
418 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
419 | } |
420 | ||
b7ef213e HFS |
421 | static inline bool __ipv6_addr_needs_scope_id(int type) |
422 | { | |
423 | return type & IPV6_ADDR_LINKLOCAL || | |
424 | (type & IPV6_ADDR_MULTICAST && | |
425 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
426 | } | |
427 | ||
428 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
429 | { | |
430 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
431 | } | |
432 | ||
1da177e4 LT |
433 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
434 | { | |
db3459d1 | 435 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
436 | } |
437 | ||
1a203cb3 | 438 | static inline bool |
f2ffd9ee PM |
439 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
440 | const struct in6_addr *a2) | |
441 | { | |
1a203cb3 ED |
442 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
443 | const unsigned long *ul1 = (const unsigned long *)a1; | |
444 | const unsigned long *ulm = (const unsigned long *)m; | |
445 | const unsigned long *ul2 = (const unsigned long *)a2; | |
446 | ||
447 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
448 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
449 | #else | |
a02cec21 ED |
450 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
451 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
452 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
453 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 454 | #endif |
f2ffd9ee PM |
455 | } |
456 | ||
82695b30 | 457 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
1da177e4 LT |
458 | const struct in6_addr *addr, |
459 | int plen) | |
460 | { | |
461 | /* caller must guarantee 0 <= plen <= 128 */ | |
462 | int o = plen >> 3, | |
463 | b = plen & 0x7; | |
464 | ||
db3459d1 | 465 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 466 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 467 | if (b != 0) |
1da177e4 | 468 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
469 | } |
470 | ||
818f1f3e AA |
471 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
472 | const struct in6_addr *pfx, | |
473 | int plen) | |
474 | { | |
475 | /* caller must guarantee 0 <= plen <= 128 */ | |
476 | int o = plen >> 3, | |
477 | b = plen & 0x7; | |
478 | ||
479 | memcpy(addr->s6_addr, pfx, o); | |
480 | if (b != 0) { | |
481 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
482 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
483 | } | |
484 | } | |
485 | ||
5206c579 YH |
486 | static inline void __ipv6_addr_set_half(__be32 *addr, |
487 | __be32 wh, __be32 wl) | |
488 | { | |
489 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
490 | #if defined(__BIG_ENDIAN) | |
491 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
492 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
493 | return; | |
494 | } | |
495 | #elif defined(__LITTLE_ENDIAN) | |
496 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
497 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
498 | return; | |
499 | } | |
500 | #endif | |
501 | #endif | |
502 | addr[0] = wh; | |
503 | addr[1] = wl; | |
504 | } | |
505 | ||
82695b30 | 506 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
507 | __be32 w1, __be32 w2, |
508 | __be32 w3, __be32 w4) | |
1da177e4 | 509 | { |
5206c579 YH |
510 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
511 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 512 | } |
1da177e4 | 513 | |
92113bfd ED |
514 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
515 | const struct in6_addr *a2) | |
1da177e4 | 516 | { |
1a203cb3 ED |
517 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
518 | const unsigned long *ul1 = (const unsigned long *)a1; | |
519 | const unsigned long *ul2 = (const unsigned long *)a2; | |
520 | ||
521 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
522 | #else | |
a02cec21 ED |
523 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
524 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
525 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
526 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 527 | #endif |
1da177e4 LT |
528 | } |
529 | ||
38675170 YH |
530 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
531 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
532 | const __be64 *a2, | |
533 | unsigned int len) | |
534 | { | |
512613d7 | 535 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
536 | return false; |
537 | return true; | |
538 | } | |
539 | ||
540 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
541 | const struct in6_addr *addr2, | |
542 | unsigned int prefixlen) | |
543 | { | |
544 | const __be64 *a1 = (const __be64 *)addr1; | |
545 | const __be64 *a2 = (const __be64 *)addr2; | |
546 | ||
547 | if (prefixlen >= 64) { | |
548 | if (a1[0] ^ a2[0]) | |
549 | return false; | |
550 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
551 | } | |
552 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
553 | } | |
554 | #else | |
2ef97332 YH |
555 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
556 | const struct in6_addr *addr2, | |
557 | unsigned int prefixlen) | |
1da177e4 | 558 | { |
2ef97332 YH |
559 | const __be32 *a1 = addr1->s6_addr32; |
560 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 561 | unsigned int pdw, pbi; |
1da177e4 LT |
562 | |
563 | /* check complete u32 in prefix */ | |
564 | pdw = prefixlen >> 5; | |
565 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 566 | return false; |
1da177e4 LT |
567 | |
568 | /* check incomplete u32 in prefix */ | |
569 | pbi = prefixlen & 0x1f; | |
570 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 571 | return false; |
1da177e4 | 572 | |
92113bfd | 573 | return true; |
1da177e4 | 574 | } |
38675170 | 575 | #endif |
1da177e4 | 576 | |
92113bfd | 577 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 578 | { |
1a203cb3 ED |
579 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
580 | const unsigned long *ul = (const unsigned long *)a; | |
581 | ||
582 | return (ul[0] | ul[1]) == 0UL; | |
583 | #else | |
a02cec21 ED |
584 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
585 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 586 | #endif |
1da177e4 LT |
587 | } |
588 | ||
ddbe5032 ED |
589 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
590 | { | |
591 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
592 | const unsigned long *ul = (const unsigned long *)a; | |
593 | unsigned long x = ul[0] ^ ul[1]; | |
594 | ||
595 | return (u32)(x ^ (x >> 32)); | |
596 | #else | |
597 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
598 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
599 | #endif | |
600 | } | |
601 | ||
08dcdbf6 | 602 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 603 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
604 | { |
605 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
606 | ||
607 | return jhash_3words(v, | |
608 | (__force u32)a->s6_addr32[2], | |
609 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 610 | initval); |
08dcdbf6 ED |
611 | } |
612 | ||
92113bfd | 613 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 614 | { |
e287656b | 615 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 616 | const __be64 *be = (const __be64 *)a; |
e287656b | 617 | |
1373a773 | 618 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 619 | #else |
a02cec21 | 620 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 621 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 622 | #endif |
f630e43a YH |
623 | } |
624 | ||
1373a773 JL |
625 | /* |
626 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
627 | * since all of the endian-annotated types are fixed size regardless of arch. | |
628 | */ | |
92113bfd | 629 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 630 | { |
a04d40b8 YH |
631 | return ( |
632 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 633 | *(unsigned long *)a | |
a04d40b8 | 634 | #else |
1373a773 | 635 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 636 | #endif |
1373a773 JL |
637 | (__force unsigned long)(a->s6_addr32[2] ^ |
638 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
639 | } |
640 | ||
f0b1e64c MKL |
641 | static inline u32 ipv6_portaddr_hash(const struct net *net, |
642 | const struct in6_addr *addr6, | |
643 | unsigned int port) | |
644 | { | |
645 | unsigned int hash, mix = net_hash_mix(net); | |
646 | ||
647 | if (ipv6_addr_any(addr6)) | |
648 | hash = jhash_1word(0, mix); | |
649 | else if (ipv6_addr_v4mapped(addr6)) | |
650 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); | |
651 | else | |
652 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); | |
653 | ||
654 | return hash ^ port; | |
655 | } | |
656 | ||
99cd07a5 JMT |
657 | /* |
658 | * Check for a RFC 4843 ORCHID address | |
659 | * (Overlay Routable Cryptographic Hash Identifiers) | |
660 | */ | |
92113bfd | 661 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 662 | { |
a02cec21 | 663 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
664 | } |
665 | ||
5c98631c LC |
666 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
667 | { | |
668 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
669 | } | |
670 | ||
f15364bd AC |
671 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
672 | struct in6_addr *v4mapped) | |
673 | { | |
674 | ipv6_addr_set(v4mapped, | |
675 | 0, 0, | |
676 | htonl(0x0000FFFF), | |
677 | addr); | |
678 | } | |
679 | ||
971f359d YH |
680 | /* |
681 | * find the first different bit between two addresses | |
682 | * length of address must be a multiple of 32bits | |
683 | */ | |
9f2e7334 | 684 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 685 | { |
ef296f56 | 686 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
687 | int i; |
688 | ||
689 | addrlen >>= 2; | |
690 | ||
691 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
692 | __be32 xb = a1[i] ^ a2[i]; |
693 | if (xb) | |
d57b8fb8 | 694 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
695 | } |
696 | ||
697 | /* | |
82695b30 | 698 | * we should *never* get to this point since that |
971f359d YH |
699 | * would mean the addrs are equal |
700 | * | |
701 | * However, we do get to it 8) And exacly, when | |
702 | * addresses are equal 8) | |
703 | * | |
704 | * ip route add 1111::/128 via ... | |
705 | * ip route add 1111::/64 via ... | |
706 | * and we are here. | |
707 | * | |
708 | * Ideally, this function should stop comparison | |
709 | * at prefix length. It does not, but it is still OK, | |
710 | * if returned value is greater than prefix length. | |
711 | * --ANK (980803) | |
712 | */ | |
a02cec21 | 713 | return addrlen << 5; |
971f359d YH |
714 | } |
715 | ||
9f2e7334 YH |
716 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
717 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
718 | { | |
719 | const __be64 *a1 = token1, *a2 = token2; | |
720 | int i; | |
721 | ||
722 | addrlen >>= 3; | |
723 | ||
724 | for (i = 0; i < addrlen; i++) { | |
725 | __be64 xb = a1[i] ^ a2[i]; | |
726 | if (xb) | |
727 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
728 | } | |
729 | ||
730 | return addrlen << 6; | |
731 | } | |
732 | #endif | |
733 | ||
734 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
735 | { | |
736 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
737 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
738 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
739 | #endif | |
740 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
741 | } | |
742 | ||
971f359d YH |
743 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
744 | { | |
745 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
746 | } | |
747 | ||
7f159867 ED |
748 | __be32 ipv6_select_ident(struct net *net, |
749 | const struct in6_addr *daddr, | |
750 | const struct in6_addr *saddr); | |
0c19f846 | 751 | __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 752 | |
5c3a0fd7 | 753 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 754 | |
5c98631c LC |
755 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
756 | struct dst_entry *dst) | |
757 | { | |
758 | int hlimit; | |
759 | ||
760 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
761 | hlimit = np->mcast_hops; | |
762 | else | |
763 | hlimit = np->hop_limit; | |
764 | if (hlimit < 0) | |
765 | hlimit = ip6_dst_hoplimit(dst); | |
766 | return hlimit; | |
767 | } | |
768 | ||
c3f83241 TH |
769 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
770 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
771 | * flow->v6addrs.dst = iph->daddr; | |
772 | */ | |
773 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
774 | const struct ipv6hdr *iph) | |
775 | { | |
776 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
777 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
778 | sizeof(flow->addrs.v6addrs.src)); | |
779 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
780 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
781 | } | |
782 | ||
a37934fc | 783 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 | 784 | |
db57dc7c VB |
785 | static inline bool ipv6_can_nonlocal_bind(struct net *net, |
786 | struct inet_sock *inet) | |
787 | { | |
788 | return net->ipv6.sysctl.ip_nonlocal_bind || | |
789 | inet->freebind || inet->transparent; | |
790 | } | |
791 | ||
42240901 TH |
792 | /* Sysctl settings for net ipv6.auto_flowlabels */ |
793 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
794 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
795 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
796 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
797 | ||
798 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
799 | ||
b5677416 | 800 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 801 | |
cb1ce2ef | 802 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
803 | __be32 flowlabel, bool autolabel, |
804 | struct flowi6 *fl6) | |
cb1ce2ef | 805 | { |
42240901 | 806 | u32 hash; |
cb1ce2ef | 807 | |
90427ef5 DM |
808 | /* @flowlabel may include more than a flow label, eg, the traffic class. |
809 | * Here we want only the flow label value. | |
810 | */ | |
811 | flowlabel &= IPV6_FLOWLABEL_MASK; | |
812 | ||
42240901 TH |
813 | if (flowlabel || |
814 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
815 | (!autolabel && | |
816 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
817 | return flowlabel; | |
cb1ce2ef | 818 | |
42240901 | 819 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 820 | |
42240901 TH |
821 | /* Since this is being sent on the wire obfuscate hash a bit |
822 | * to minimize possbility that any useful information to an | |
823 | * attacker is leaked. Only lower 20 bits are relevant. | |
824 | */ | |
169dc027 | 825 | hash = rol32(hash, 16); |
82a584b7 | 826 | |
42240901 TH |
827 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
828 | ||
829 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
830 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
831 | |
832 | return flowlabel; | |
833 | } | |
42240901 TH |
834 | |
835 | static inline int ip6_default_np_autolabel(struct net *net) | |
836 | { | |
837 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
838 | case IP6_AUTO_FLOW_LABEL_OFF: | |
839 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
840 | default: | |
841 | return 0; | |
842 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
843 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
844 | return 1; | |
845 | } | |
846 | } | |
a37934fc FF |
847 | #else |
848 | static inline void ip6_set_txhash(struct sock *sk) { } | |
849 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
850 | __be32 flowlabel, bool autolabel, |
851 | struct flowi6 *fl6) | |
a37934fc FF |
852 | { |
853 | return flowlabel; | |
854 | } | |
42240901 TH |
855 | static inline int ip6_default_np_autolabel(struct net *net) |
856 | { | |
857 | return 0; | |
858 | } | |
a37934fc FF |
859 | #endif |
860 | ||
918ee507 PM |
861 | #if IS_ENABLED(CONFIG_IPV6) |
862 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
863 | { | |
864 | return net->ipv6.sysctl.multipath_hash_policy; | |
865 | } | |
866 | #else | |
867 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
868 | { | |
869 | return 0; | |
870 | } | |
871 | #endif | |
cb1ce2ef | 872 | |
3e4e4c1f YH |
873 | /* |
874 | * Header manipulation | |
875 | */ | |
876 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
877 | __be32 flowlabel) | |
878 | { | |
07f623d3 | 879 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
880 | } |
881 | ||
6502ca52 YH |
882 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
883 | { | |
884 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
885 | } | |
886 | ||
3308de2b FF |
887 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
888 | { | |
889 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
890 | } | |
891 | ||
d76ed22b LR |
892 | static inline u8 ip6_tclass(__be32 flowinfo) |
893 | { | |
894 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
895 | } | |
eaa93bf4 DB |
896 | |
897 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
898 | { | |
899 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
900 | } | |
901 | ||
fa1be7e0 MK |
902 | static inline __be32 flowi6_get_flowlabel(const struct flowi6 *fl6) |
903 | { | |
904 | return fl6->flowlabel & IPV6_FLOWLABEL_MASK; | |
905 | } | |
906 | ||
1da177e4 LT |
907 | /* |
908 | * Prototypes exported by ipv6 | |
909 | */ | |
910 | ||
911 | /* | |
912 | * rcv function (called from netdevice level) | |
913 | */ | |
914 | ||
5c3a0fd7 JP |
915 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
916 | struct packet_type *pt, struct net_device *orig_dev); | |
d8269e2c EC |
917 | void ipv6_list_rcv(struct list_head *head, struct packet_type *pt, |
918 | struct net_device *orig_dev); | |
1da177e4 | 919 | |
0c4b51f0 | 920 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 921 | |
1da177e4 LT |
922 | /* |
923 | * upper-layer output functions | |
924 | */ | |
1c1e9d2b | 925 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
92e55f41 | 926 | __u32 mark, struct ipv6_txoptions *opt, int tclass); |
5c3a0fd7 JP |
927 | |
928 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
929 | ||
930 | int ip6_append_data(struct sock *sk, | |
931 | int getfrag(void *from, char *to, int offset, int len, | |
932 | int odd, struct sk_buff *skb), | |
26879da5 WW |
933 | void *from, int length, int transhdrlen, |
934 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, | |
5fdaa88d | 935 | struct rt6_info *rt, unsigned int flags); |
5c3a0fd7 JP |
936 | |
937 | int ip6_push_pending_frames(struct sock *sk); | |
938 | ||
939 | void ip6_flush_pending_frames(struct sock *sk); | |
940 | ||
6422398c VY |
941 | int ip6_send_skb(struct sk_buff *skb); |
942 | ||
943 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
944 | struct inet_cork_full *cork, | |
945 | struct inet6_cork *v6_cork); | |
946 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
947 | int getfrag(void *from, char *to, int offset, | |
948 | int len, int odd, struct sk_buff *skb), | |
949 | void *from, int length, int transhdrlen, | |
26879da5 WW |
950 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, |
951 | struct rt6_info *rt, unsigned int flags, | |
5fdaa88d | 952 | struct inet_cork_full *cork); |
6422398c VY |
953 | |
954 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
955 | { | |
956 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
957 | &inet6_sk(sk)->cork); | |
958 | } | |
959 | ||
343d60aa RP |
960 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
961 | struct flowi6 *fl6); | |
3aef934f | 962 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 963 | const struct in6_addr *final_dst); |
5c3a0fd7 | 964 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
96818159 AK |
965 | const struct in6_addr *final_dst, |
966 | bool connected); | |
5c3a0fd7 JP |
967 | struct dst_entry *ip6_blackhole_route(struct net *net, |
968 | struct dst_entry *orig_dst); | |
1da177e4 LT |
969 | |
970 | /* | |
971 | * skb processing functions | |
972 | */ | |
973 | ||
ede2059d | 974 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
975 | int ip6_forward(struct sk_buff *skb); |
976 | int ip6_input(struct sk_buff *skb); | |
977 | int ip6_mc_input(struct sk_buff *skb); | |
80bde363 PA |
978 | void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr, |
979 | bool have_final); | |
1da177e4 | 980 | |
cf91a99d | 981 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 982 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 983 | |
1da177e4 LT |
984 | /* |
985 | * Extension header (options) processing | |
986 | */ | |
987 | ||
5c3a0fd7 | 988 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
613fa3ca DL |
989 | u8 *proto, struct in6_addr **daddr_p, |
990 | struct in6_addr *saddr); | |
5c3a0fd7 JP |
991 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
992 | u8 *proto); | |
1da177e4 | 993 | |
5c3a0fd7 JP |
994 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
995 | __be16 *frag_offp); | |
1da177e4 | 996 | |
5c3a0fd7 | 997 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 998 | |
f8f62675 | 999 | enum { |
9195bb8e AA |
1000 | IP6_FH_F_FRAG = (1 << 0), |
1001 | IP6_FH_F_AUTH = (1 << 1), | |
1002 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
1003 | }; |
1004 | ||
1005 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
1006 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
1007 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 1008 | |
0868383b | 1009 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 1010 | |
5c3a0fd7 JP |
1011 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
1012 | const struct ipv6_txoptions *opt, | |
1013 | struct in6_addr *orig); | |
20c59de2 | 1014 | |
1da177e4 LT |
1015 | /* |
1016 | * socket options (ipv6_sockglue.c) | |
1017 | */ | |
1018 | ||
5c3a0fd7 JP |
1019 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
1020 | char __user *optval, unsigned int optlen); | |
1021 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1022 | char __user *optval, int __user *optlen); | |
1023 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
1024 | char __user *optval, unsigned int optlen); | |
1025 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1026 | char __user *optval, int __user *optlen); | |
1027 | ||
0382a25a GN |
1028 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, |
1029 | int addr_len); | |
5c3a0fd7 | 1030 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
82b276cd HFS |
1031 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
1032 | int addr_len); | |
33c162a9 | 1033 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 1034 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 1035 | |
85fbaa75 HFS |
1036 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
1037 | int *addr_len); | |
1038 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
1039 | int *addr_len); | |
5c3a0fd7 JP |
1040 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1041 | u32 info, u8 *payload); | |
1042 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
1043 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1044 | ||
1045 | int inet6_release(struct socket *sock); | |
1046 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
9b2c45d4 | 1047 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
5c3a0fd7 JP |
1048 | int peer); |
1049 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
1050 | ||
1051 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
1052 | struct sock *sk); |
1053 | ||
1da177e4 LT |
1054 | /* |
1055 | * reassembly.c | |
1056 | */ | |
90ddc4f0 ED |
1057 | extern const struct proto_ops inet6_stream_ops; |
1058 | extern const struct proto_ops inet6_dgram_ops; | |
77d4b1d3 | 1059 | extern const struct proto_ops inet6_sockraw_ops; |
20380731 | 1060 | |
14c85021 ACM |
1061 | struct group_source_req; |
1062 | struct group_filter; | |
1063 | ||
5c3a0fd7 JP |
1064 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1065 | struct group_source_req *pgsr); | |
1066 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
1067 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
1068 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
1069 | |
1070 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1071 | int ac6_proc_init(struct net *net); |
1072 | void ac6_proc_exit(struct net *net); | |
1073 | int raw6_proc_init(void); | |
1074 | void raw6_proc_exit(void); | |
1075 | int tcp6_proc_init(struct net *net); | |
1076 | void tcp6_proc_exit(struct net *net); | |
1077 | int udp6_proc_init(struct net *net); | |
1078 | void udp6_proc_exit(struct net *net); | |
1079 | int udplite6_proc_init(void); | |
1080 | void udplite6_proc_exit(void); | |
1081 | int ipv6_misc_proc_init(void); | |
1082 | void ipv6_misc_proc_exit(void); | |
1083 | int snmp6_register_dev(struct inet6_dev *idev); | |
1084 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1085 | |
7f7d9a6b | 1086 | #else |
6ab57e7e DL |
1087 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1088 | static inline void ac6_proc_exit(struct net *net) { } | |
1089 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1090 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1091 | #endif |
1da177e4 | 1092 | |
20380731 | 1093 | #ifdef CONFIG_SYSCTL |
5c3a0fd7 JP |
1094 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1095 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1096 | int ipv6_sysctl_register(void); | |
1097 | void ipv6_sysctl_unregister(void); | |
20380731 | 1098 | #endif |
1da177e4 | 1099 | |
46a4dee0 MC |
1100 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1101 | const struct in6_addr *addr); | |
c7ea20c9 HL |
1102 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
1103 | const struct in6_addr *addr, unsigned int mode); | |
46a4dee0 MC |
1104 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1105 | const struct in6_addr *addr); | |
20380731 | 1106 | #endif /* _NET_IPV6_H */ |