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 | |
0feca619 PNA |
157 | struct ip6_fraglist_iter { |
158 | struct ipv6hdr *tmp_hdr; | |
159 | struct sk_buff *frag_list; | |
160 | struct sk_buff *frag; | |
161 | int offset; | |
162 | unsigned int hlen; | |
163 | __be32 frag_id; | |
164 | u8 nexthdr; | |
165 | }; | |
166 | ||
167 | int ip6_fraglist_init(struct sk_buff *skb, unsigned int hlen, u8 *prevhdr, | |
168 | u8 nexthdr, __be32 frag_id, | |
169 | struct ip6_fraglist_iter *iter); | |
170 | void ip6_fraglist_prepare(struct sk_buff *skb, struct ip6_fraglist_iter *iter); | |
171 | ||
172 | static inline struct sk_buff *ip6_fraglist_next(struct ip6_fraglist_iter *iter) | |
173 | { | |
174 | struct sk_buff *skb = iter->frag; | |
175 | ||
176 | iter->frag = skb->next; | |
177 | skb_mark_not_on_list(skb); | |
178 | ||
179 | return skb; | |
180 | } | |
181 | ||
e110861f LC |
182 | #define IP6_REPLY_MARK(net, mark) \ |
183 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) | |
184 | ||
1da177e4 LT |
185 | #include <net/sock.h> |
186 | ||
187 | /* sysctls */ | |
1da177e4 | 188 | extern int sysctl_mld_max_msf; |
2f711939 | 189 | extern int sysctl_mld_qrv; |
3d7cc2ba | 190 | |
13415e46 | 191 | #define _DEVINC(net, statname, mod, idev, field) \ |
14878f75 | 192 | ({ \ |
a11d206d YH |
193 | struct inet6_dev *_idev = (idev); \ |
194 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
195 | mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\ |
196 | mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\ | |
a11d206d | 197 | }) |
14878f75 | 198 | |
be281e55 | 199 | /* per device counters are atomic_long_t */ |
13415e46 | 200 | #define _DEVINCATOMIC(net, statname, mod, idev, field) \ |
be281e55 ED |
201 | ({ \ |
202 | struct inet6_dev *_idev = (idev); \ | |
203 | if (likely(_idev != NULL)) \ | |
204 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
13415e46 | 205 | mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\ |
be281e55 ED |
206 | }) |
207 | ||
2a24444f ED |
208 | /* per device and per net counters are atomic_long_t */ |
209 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
210 | ({ \ | |
211 | struct inet6_dev *_idev = (idev); \ | |
212 | if (likely(_idev != NULL)) \ | |
213 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
214 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
215 | }) | |
216 | ||
13415e46 | 217 | #define _DEVADD(net, statname, mod, idev, field, val) \ |
8e7999c4 PE |
218 | ({ \ |
219 | struct inet6_dev *_idev = (idev); \ | |
220 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
221 | mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \ |
222 | mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\ | |
8e7999c4 PE |
223 | }) |
224 | ||
13415e46 | 225 | #define _DEVUPD(net, statname, mod, idev, field, val) \ |
edf391ff NH |
226 | ({ \ |
227 | struct inet6_dev *_idev = (idev); \ | |
228 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
229 | mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \ |
230 | mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\ | |
edf391ff NH |
231 | }) |
232 | ||
14878f75 | 233 | /* MIBs */ |
14878f75 | 234 | |
087fe240 | 235 | #define IP6_INC_STATS(net, idev,field) \ |
13415e46 | 236 | _DEVINC(net, ipv6, , idev, field) |
1d015503 | 237 | #define __IP6_INC_STATS(net, idev,field) \ |
13415e46 | 238 | _DEVINC(net, ipv6, __, idev, field) |
edf391ff | 239 | #define IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 240 | _DEVADD(net, ipv6, , idev, field, val) |
1d015503 | 241 | #define __IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 242 | _DEVADD(net, ipv6, __, idev, field, val) |
edf391ff | 243 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 244 | _DEVUPD(net, ipv6, , idev, field, val) |
c2005eb0 | 245 | #define __IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 246 | _DEVUPD(net, ipv6, __, idev, field, val) |
087fe240 | 247 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 248 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
a16292a0 | 249 | #define __ICMP6_INC_STATS(net, idev, field) \ |
13415e46 | 250 | _DEVINCATOMIC(net, icmpv6, __, idev, field) |
087fe240 DL |
251 | |
252 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 253 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
f3832ed2 | 254 | #define ICMP6MSGIN_INC_STATS(net, idev, field) \ |
2a24444f | 255 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 256 | |
fd2c3ef7 | 257 | struct ip6_ra_chain { |
1da177e4 LT |
258 | struct ip6_ra_chain *next; |
259 | struct sock *sk; | |
260 | int sel; | |
261 | void (*destructor)(struct sock *); | |
262 | }; | |
263 | ||
264 | extern struct ip6_ra_chain *ip6_ra_chain; | |
265 | extern rwlock_t ip6_ra_lock; | |
266 | ||
267 | /* | |
268 | This structure is prepared by protocol, when parsing | |
269 | ancillary data and passed to IPv6. | |
270 | */ | |
271 | ||
fd2c3ef7 | 272 | struct ipv6_txoptions { |
0aeea21a | 273 | refcount_t refcnt; |
1da177e4 LT |
274 | /* Length of this structure */ |
275 | int tot_len; | |
276 | ||
277 | /* length of extension headers */ | |
278 | ||
279 | __u16 opt_flen; /* after fragment hdr */ | |
280 | __u16 opt_nflen; /* before fragment hdr */ | |
281 | ||
282 | struct ipv6_opt_hdr *hopopt; | |
283 | struct ipv6_opt_hdr *dst0opt; | |
284 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 285 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 286 | struct rcu_head rcu; |
1da177e4 LT |
287 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
288 | }; | |
289 | ||
fd2c3ef7 | 290 | struct ip6_flowlabel { |
7f0e44ac | 291 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 292 | __be32 label; |
db3459d1 | 293 | atomic_t users; |
1da177e4 LT |
294 | struct in6_addr dst; |
295 | struct ipv6_txoptions *opt; | |
1da177e4 | 296 | unsigned long linger; |
d3aedd5e | 297 | struct rcu_head rcu; |
1da177e4 | 298 | u8 share; |
4f82f457 EB |
299 | union { |
300 | struct pid *pid; | |
301 | kuid_t uid; | |
302 | } owner; | |
1da177e4 LT |
303 | unsigned long lastuse; |
304 | unsigned long expires; | |
60e8fbc4 | 305 | struct net *fl_net; |
1da177e4 LT |
306 | }; |
307 | ||
82a584b7 TH |
308 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
309 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
310 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
311 | ||
37cfee90 | 312 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 313 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 314 | |
fd2c3ef7 | 315 | struct ipv6_fl_socklist { |
7f0e44ac ED |
316 | struct ipv6_fl_socklist __rcu *next; |
317 | struct ip6_flowlabel *fl; | |
318 | struct rcu_head rcu; | |
1da177e4 LT |
319 | }; |
320 | ||
26879da5 | 321 | struct ipcm6_cookie { |
5fdaa88d | 322 | struct sockcm_cookie sockc; |
26879da5 WW |
323 | __s16 hlimit; |
324 | __s16 tclass; | |
325 | __s8 dontfrag; | |
326 | struct ipv6_txoptions *opt; | |
bec1f6f6 | 327 | __u16 gso_size; |
26879da5 WW |
328 | }; |
329 | ||
b515430a WB |
330 | static inline void ipcm6_init(struct ipcm6_cookie *ipc6) |
331 | { | |
332 | *ipc6 = (struct ipcm6_cookie) { | |
333 | .hlimit = -1, | |
334 | .tclass = -1, | |
335 | .dontfrag = -1, | |
336 | }; | |
337 | } | |
338 | ||
339 | static inline void ipcm6_init_sk(struct ipcm6_cookie *ipc6, | |
340 | const struct ipv6_pinfo *np) | |
341 | { | |
342 | *ipc6 = (struct ipcm6_cookie) { | |
343 | .hlimit = -1, | |
344 | .tclass = np->tclass, | |
345 | .dontfrag = np->dontfrag, | |
346 | }; | |
347 | } | |
348 | ||
45f6fad8 ED |
349 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
350 | { | |
351 | struct ipv6_txoptions *opt; | |
352 | ||
353 | rcu_read_lock(); | |
354 | opt = rcu_dereference(np->opt); | |
e550785c | 355 | if (opt) { |
0aeea21a | 356 | if (!refcount_inc_not_zero(&opt->refcnt)) |
e550785c BP |
357 | opt = NULL; |
358 | else | |
359 | opt = rcu_pointer_handoff(opt); | |
360 | } | |
45f6fad8 ED |
361 | rcu_read_unlock(); |
362 | return opt; | |
363 | } | |
364 | ||
365 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
366 | { | |
0aeea21a | 367 | if (opt && refcount_dec_and_test(&opt->refcnt)) |
45f6fad8 ED |
368 | kfree_rcu(opt, rcu); |
369 | } | |
370 | ||
5c3a0fd7 JP |
371 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
372 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
373 | struct ip6_flowlabel *fl, | |
374 | struct ipv6_txoptions *fopt); | |
375 | void fl6_free_socklist(struct sock *sk); | |
376 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
377 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
378 | int flags); | |
5c3a0fd7 JP |
379 | int ip6_flowlabel_init(void); |
380 | void ip6_flowlabel_cleanup(void); | |
e9191ffb | 381 | bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np); |
1da177e4 LT |
382 | |
383 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
384 | { | |
385 | if (fl) | |
386 | atomic_dec(&fl->users); | |
387 | } | |
388 | ||
5c3a0fd7 | 389 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 390 | |
4e64b1ed JP |
391 | void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
392 | struct icmp6hdr *thdr, int len); | |
6d0bfe22 | 393 | |
5c3a0fd7 | 394 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 395 | |
5c3a0fd7 | 396 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 397 | |
5c3a0fd7 JP |
398 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
399 | struct ipv6_txoptions *opt); | |
400 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
401 | struct ipv6_txoptions *opt, | |
402 | int newtype, | |
a9ba23d4 | 403 | struct ipv6_opt_hdr *newopt); |
df9890c3 YH |
404 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
405 | struct ipv6_txoptions *opt); | |
1da177e4 | 406 | |
a224772d ED |
407 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
408 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
409 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
410 | struct ipv6_txoptions *opt); | |
399c07de | 411 | |
aeaf6e9d SL |
412 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
413 | { | |
414 | /* If forwarding is enabled, RA are not accepted unless the special | |
415 | * hybrid mode (accept_ra=2) is enabled. | |
416 | */ | |
417 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
418 | idev->cnf.accept_ra; | |
419 | } | |
420 | ||
c2a93660 JDB |
421 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
422 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 423 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 424 | |
5c3a0fd7 | 425 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
426 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
427 | { | |
428 | return __ipv6_addr_type(addr) & 0xffff; | |
429 | } | |
1da177e4 LT |
430 | |
431 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
432 | { | |
b1cacb68 YH |
433 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
434 | } | |
435 | ||
436 | static inline int __ipv6_addr_src_scope(int type) | |
437 | { | |
a02cec21 | 438 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
439 | } |
440 | ||
441 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
442 | { | |
443 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
444 | } |
445 | ||
b7ef213e HFS |
446 | static inline bool __ipv6_addr_needs_scope_id(int type) |
447 | { | |
448 | return type & IPV6_ADDR_LINKLOCAL || | |
449 | (type & IPV6_ADDR_MULTICAST && | |
450 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
451 | } | |
452 | ||
453 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
454 | { | |
455 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
456 | } | |
457 | ||
1da177e4 LT |
458 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
459 | { | |
db3459d1 | 460 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
461 | } |
462 | ||
1a203cb3 | 463 | static inline bool |
f2ffd9ee PM |
464 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
465 | const struct in6_addr *a2) | |
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 *ulm = (const unsigned long *)m; | |
470 | const unsigned long *ul2 = (const unsigned long *)a2; | |
471 | ||
472 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
473 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
474 | #else | |
a02cec21 ED |
475 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
476 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
477 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
478 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 479 | #endif |
f2ffd9ee PM |
480 | } |
481 | ||
82695b30 | 482 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
1da177e4 LT |
483 | const struct in6_addr *addr, |
484 | int plen) | |
485 | { | |
486 | /* caller must guarantee 0 <= plen <= 128 */ | |
487 | int o = plen >> 3, | |
488 | b = plen & 0x7; | |
489 | ||
db3459d1 | 490 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 491 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 492 | if (b != 0) |
1da177e4 | 493 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
494 | } |
495 | ||
818f1f3e AA |
496 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
497 | const struct in6_addr *pfx, | |
498 | int plen) | |
499 | { | |
500 | /* caller must guarantee 0 <= plen <= 128 */ | |
501 | int o = plen >> 3, | |
502 | b = plen & 0x7; | |
503 | ||
504 | memcpy(addr->s6_addr, pfx, o); | |
505 | if (b != 0) { | |
506 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
507 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
508 | } | |
509 | } | |
510 | ||
5206c579 YH |
511 | static inline void __ipv6_addr_set_half(__be32 *addr, |
512 | __be32 wh, __be32 wl) | |
513 | { | |
514 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
515 | #if defined(__BIG_ENDIAN) | |
516 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
517 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
518 | return; | |
519 | } | |
520 | #elif defined(__LITTLE_ENDIAN) | |
521 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
522 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
523 | return; | |
524 | } | |
525 | #endif | |
526 | #endif | |
527 | addr[0] = wh; | |
528 | addr[1] = wl; | |
529 | } | |
530 | ||
82695b30 | 531 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
532 | __be32 w1, __be32 w2, |
533 | __be32 w3, __be32 w4) | |
1da177e4 | 534 | { |
5206c579 YH |
535 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
536 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 537 | } |
1da177e4 | 538 | |
92113bfd ED |
539 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
540 | const struct in6_addr *a2) | |
1da177e4 | 541 | { |
1a203cb3 ED |
542 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
543 | const unsigned long *ul1 = (const unsigned long *)a1; | |
544 | const unsigned long *ul2 = (const unsigned long *)a2; | |
545 | ||
546 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
547 | #else | |
a02cec21 ED |
548 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
549 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
550 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
551 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 552 | #endif |
1da177e4 LT |
553 | } |
554 | ||
38675170 YH |
555 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
556 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
557 | const __be64 *a2, | |
558 | unsigned int len) | |
559 | { | |
512613d7 | 560 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
561 | return false; |
562 | return true; | |
563 | } | |
564 | ||
565 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
566 | const struct in6_addr *addr2, | |
567 | unsigned int prefixlen) | |
568 | { | |
569 | const __be64 *a1 = (const __be64 *)addr1; | |
570 | const __be64 *a2 = (const __be64 *)addr2; | |
571 | ||
572 | if (prefixlen >= 64) { | |
573 | if (a1[0] ^ a2[0]) | |
574 | return false; | |
575 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
576 | } | |
577 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
578 | } | |
579 | #else | |
2ef97332 YH |
580 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
581 | const struct in6_addr *addr2, | |
582 | unsigned int prefixlen) | |
1da177e4 | 583 | { |
2ef97332 YH |
584 | const __be32 *a1 = addr1->s6_addr32; |
585 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 586 | unsigned int pdw, pbi; |
1da177e4 LT |
587 | |
588 | /* check complete u32 in prefix */ | |
589 | pdw = prefixlen >> 5; | |
590 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 591 | return false; |
1da177e4 LT |
592 | |
593 | /* check incomplete u32 in prefix */ | |
594 | pbi = prefixlen & 0x1f; | |
595 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 596 | return false; |
1da177e4 | 597 | |
92113bfd | 598 | return true; |
1da177e4 | 599 | } |
38675170 | 600 | #endif |
1da177e4 | 601 | |
92113bfd | 602 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 603 | { |
1a203cb3 ED |
604 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
605 | const unsigned long *ul = (const unsigned long *)a; | |
606 | ||
607 | return (ul[0] | ul[1]) == 0UL; | |
608 | #else | |
a02cec21 ED |
609 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
610 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 611 | #endif |
1da177e4 LT |
612 | } |
613 | ||
ddbe5032 ED |
614 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
615 | { | |
616 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
617 | const unsigned long *ul = (const unsigned long *)a; | |
618 | unsigned long x = ul[0] ^ ul[1]; | |
619 | ||
620 | return (u32)(x ^ (x >> 32)); | |
621 | #else | |
622 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
623 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
624 | #endif | |
625 | } | |
626 | ||
08dcdbf6 | 627 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 628 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
629 | { |
630 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
631 | ||
632 | return jhash_3words(v, | |
633 | (__force u32)a->s6_addr32[2], | |
634 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 635 | initval); |
08dcdbf6 ED |
636 | } |
637 | ||
92113bfd | 638 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 639 | { |
e287656b | 640 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 641 | const __be64 *be = (const __be64 *)a; |
e287656b | 642 | |
1373a773 | 643 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 644 | #else |
a02cec21 | 645 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 646 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 647 | #endif |
f630e43a YH |
648 | } |
649 | ||
1373a773 JL |
650 | /* |
651 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
652 | * since all of the endian-annotated types are fixed size regardless of arch. | |
653 | */ | |
92113bfd | 654 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 655 | { |
a04d40b8 YH |
656 | return ( |
657 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 658 | *(unsigned long *)a | |
a04d40b8 | 659 | #else |
1373a773 | 660 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 661 | #endif |
1373a773 JL |
662 | (__force unsigned long)(a->s6_addr32[2] ^ |
663 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
664 | } |
665 | ||
f0b1e64c MKL |
666 | static inline u32 ipv6_portaddr_hash(const struct net *net, |
667 | const struct in6_addr *addr6, | |
668 | unsigned int port) | |
669 | { | |
670 | unsigned int hash, mix = net_hash_mix(net); | |
671 | ||
672 | if (ipv6_addr_any(addr6)) | |
673 | hash = jhash_1word(0, mix); | |
674 | else if (ipv6_addr_v4mapped(addr6)) | |
675 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); | |
676 | else | |
677 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); | |
678 | ||
679 | return hash ^ port; | |
680 | } | |
681 | ||
99cd07a5 JMT |
682 | /* |
683 | * Check for a RFC 4843 ORCHID address | |
684 | * (Overlay Routable Cryptographic Hash Identifiers) | |
685 | */ | |
92113bfd | 686 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 687 | { |
a02cec21 | 688 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
689 | } |
690 | ||
5c98631c LC |
691 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
692 | { | |
693 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
694 | } | |
695 | ||
f15364bd AC |
696 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
697 | struct in6_addr *v4mapped) | |
698 | { | |
699 | ipv6_addr_set(v4mapped, | |
700 | 0, 0, | |
701 | htonl(0x0000FFFF), | |
702 | addr); | |
703 | } | |
704 | ||
971f359d YH |
705 | /* |
706 | * find the first different bit between two addresses | |
707 | * length of address must be a multiple of 32bits | |
708 | */ | |
9f2e7334 | 709 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 710 | { |
ef296f56 | 711 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
712 | int i; |
713 | ||
714 | addrlen >>= 2; | |
715 | ||
716 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
717 | __be32 xb = a1[i] ^ a2[i]; |
718 | if (xb) | |
d57b8fb8 | 719 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
720 | } |
721 | ||
722 | /* | |
82695b30 | 723 | * we should *never* get to this point since that |
971f359d YH |
724 | * would mean the addrs are equal |
725 | * | |
726 | * However, we do get to it 8) And exacly, when | |
727 | * addresses are equal 8) | |
728 | * | |
729 | * ip route add 1111::/128 via ... | |
730 | * ip route add 1111::/64 via ... | |
731 | * and we are here. | |
732 | * | |
733 | * Ideally, this function should stop comparison | |
734 | * at prefix length. It does not, but it is still OK, | |
735 | * if returned value is greater than prefix length. | |
736 | * --ANK (980803) | |
737 | */ | |
a02cec21 | 738 | return addrlen << 5; |
971f359d YH |
739 | } |
740 | ||
9f2e7334 YH |
741 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
742 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
743 | { | |
744 | const __be64 *a1 = token1, *a2 = token2; | |
745 | int i; | |
746 | ||
747 | addrlen >>= 3; | |
748 | ||
749 | for (i = 0; i < addrlen; i++) { | |
750 | __be64 xb = a1[i] ^ a2[i]; | |
751 | if (xb) | |
752 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
753 | } | |
754 | ||
755 | return addrlen << 6; | |
756 | } | |
757 | #endif | |
758 | ||
759 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
760 | { | |
761 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
762 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
763 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
764 | #endif | |
765 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
766 | } | |
767 | ||
971f359d YH |
768 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
769 | { | |
770 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
771 | } | |
772 | ||
7f159867 ED |
773 | __be32 ipv6_select_ident(struct net *net, |
774 | const struct in6_addr *daddr, | |
775 | const struct in6_addr *saddr); | |
0c19f846 | 776 | __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 777 | |
5c3a0fd7 | 778 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 779 | |
5c98631c LC |
780 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
781 | struct dst_entry *dst) | |
782 | { | |
783 | int hlimit; | |
784 | ||
785 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
786 | hlimit = np->mcast_hops; | |
787 | else | |
788 | hlimit = np->hop_limit; | |
789 | if (hlimit < 0) | |
790 | hlimit = ip6_dst_hoplimit(dst); | |
791 | return hlimit; | |
792 | } | |
793 | ||
c3f83241 TH |
794 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
795 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
796 | * flow->v6addrs.dst = iph->daddr; | |
797 | */ | |
798 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
799 | const struct ipv6hdr *iph) | |
800 | { | |
801 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
802 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
803 | sizeof(flow->addrs.v6addrs.src)); | |
804 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
805 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
806 | } | |
807 | ||
a37934fc | 808 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 | 809 | |
db57dc7c VB |
810 | static inline bool ipv6_can_nonlocal_bind(struct net *net, |
811 | struct inet_sock *inet) | |
812 | { | |
813 | return net->ipv6.sysctl.ip_nonlocal_bind || | |
814 | inet->freebind || inet->transparent; | |
815 | } | |
816 | ||
42240901 TH |
817 | /* Sysctl settings for net ipv6.auto_flowlabels */ |
818 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
819 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
820 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
821 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
822 | ||
823 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
824 | ||
b5677416 | 825 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 826 | |
cb1ce2ef | 827 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
828 | __be32 flowlabel, bool autolabel, |
829 | struct flowi6 *fl6) | |
cb1ce2ef | 830 | { |
42240901 | 831 | u32 hash; |
cb1ce2ef | 832 | |
90427ef5 DM |
833 | /* @flowlabel may include more than a flow label, eg, the traffic class. |
834 | * Here we want only the flow label value. | |
835 | */ | |
836 | flowlabel &= IPV6_FLOWLABEL_MASK; | |
837 | ||
42240901 TH |
838 | if (flowlabel || |
839 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
840 | (!autolabel && | |
841 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
842 | return flowlabel; | |
cb1ce2ef | 843 | |
42240901 | 844 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 845 | |
42240901 TH |
846 | /* Since this is being sent on the wire obfuscate hash a bit |
847 | * to minimize possbility that any useful information to an | |
848 | * attacker is leaked. Only lower 20 bits are relevant. | |
849 | */ | |
169dc027 | 850 | hash = rol32(hash, 16); |
82a584b7 | 851 | |
42240901 TH |
852 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
853 | ||
854 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
855 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
856 | |
857 | return flowlabel; | |
858 | } | |
42240901 TH |
859 | |
860 | static inline int ip6_default_np_autolabel(struct net *net) | |
861 | { | |
862 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
863 | case IP6_AUTO_FLOW_LABEL_OFF: | |
864 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
865 | default: | |
866 | return 0; | |
867 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
868 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
869 | return 1; | |
870 | } | |
871 | } | |
a37934fc FF |
872 | #else |
873 | static inline void ip6_set_txhash(struct sock *sk) { } | |
874 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
875 | __be32 flowlabel, bool autolabel, |
876 | struct flowi6 *fl6) | |
a37934fc FF |
877 | { |
878 | return flowlabel; | |
879 | } | |
42240901 TH |
880 | static inline int ip6_default_np_autolabel(struct net *net) |
881 | { | |
882 | return 0; | |
883 | } | |
a37934fc FF |
884 | #endif |
885 | ||
918ee507 PM |
886 | #if IS_ENABLED(CONFIG_IPV6) |
887 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
888 | { | |
889 | return net->ipv6.sysctl.multipath_hash_policy; | |
890 | } | |
891 | #else | |
892 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
893 | { | |
894 | return 0; | |
895 | } | |
896 | #endif | |
cb1ce2ef | 897 | |
3e4e4c1f YH |
898 | /* |
899 | * Header manipulation | |
900 | */ | |
901 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
902 | __be32 flowlabel) | |
903 | { | |
07f623d3 | 904 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
905 | } |
906 | ||
6502ca52 YH |
907 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
908 | { | |
909 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
910 | } | |
911 | ||
3308de2b FF |
912 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
913 | { | |
914 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
915 | } | |
916 | ||
d76ed22b LR |
917 | static inline u8 ip6_tclass(__be32 flowinfo) |
918 | { | |
919 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
920 | } | |
eaa93bf4 DB |
921 | |
922 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
923 | { | |
924 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
925 | } | |
926 | ||
fa1be7e0 MK |
927 | static inline __be32 flowi6_get_flowlabel(const struct flowi6 *fl6) |
928 | { | |
929 | return fl6->flowlabel & IPV6_FLOWLABEL_MASK; | |
930 | } | |
931 | ||
1da177e4 LT |
932 | /* |
933 | * Prototypes exported by ipv6 | |
934 | */ | |
935 | ||
936 | /* | |
937 | * rcv function (called from netdevice level) | |
938 | */ | |
939 | ||
5c3a0fd7 JP |
940 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
941 | struct packet_type *pt, struct net_device *orig_dev); | |
d8269e2c EC |
942 | void ipv6_list_rcv(struct list_head *head, struct packet_type *pt, |
943 | struct net_device *orig_dev); | |
1da177e4 | 944 | |
0c4b51f0 | 945 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 946 | |
1da177e4 LT |
947 | /* |
948 | * upper-layer output functions | |
949 | */ | |
1c1e9d2b | 950 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
92e55f41 | 951 | __u32 mark, struct ipv6_txoptions *opt, int tclass); |
5c3a0fd7 JP |
952 | |
953 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
954 | ||
955 | int ip6_append_data(struct sock *sk, | |
956 | int getfrag(void *from, char *to, int offset, int len, | |
957 | int odd, struct sk_buff *skb), | |
26879da5 WW |
958 | void *from, int length, int transhdrlen, |
959 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, | |
5fdaa88d | 960 | struct rt6_info *rt, unsigned int flags); |
5c3a0fd7 JP |
961 | |
962 | int ip6_push_pending_frames(struct sock *sk); | |
963 | ||
964 | void ip6_flush_pending_frames(struct sock *sk); | |
965 | ||
6422398c VY |
966 | int ip6_send_skb(struct sk_buff *skb); |
967 | ||
968 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
969 | struct inet_cork_full *cork, | |
970 | struct inet6_cork *v6_cork); | |
971 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
972 | int getfrag(void *from, char *to, int offset, | |
973 | int len, int odd, struct sk_buff *skb), | |
974 | void *from, int length, int transhdrlen, | |
26879da5 WW |
975 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, |
976 | struct rt6_info *rt, unsigned int flags, | |
5fdaa88d | 977 | struct inet_cork_full *cork); |
6422398c VY |
978 | |
979 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
980 | { | |
981 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
982 | &inet6_sk(sk)->cork); | |
983 | } | |
984 | ||
343d60aa RP |
985 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
986 | struct flowi6 *fl6); | |
3aef934f | 987 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 988 | const struct in6_addr *final_dst); |
5c3a0fd7 | 989 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
96818159 AK |
990 | const struct in6_addr *final_dst, |
991 | bool connected); | |
5c3a0fd7 JP |
992 | struct dst_entry *ip6_blackhole_route(struct net *net, |
993 | struct dst_entry *orig_dst); | |
1da177e4 LT |
994 | |
995 | /* | |
996 | * skb processing functions | |
997 | */ | |
998 | ||
ede2059d | 999 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
1000 | int ip6_forward(struct sk_buff *skb); |
1001 | int ip6_input(struct sk_buff *skb); | |
1002 | int ip6_mc_input(struct sk_buff *skb); | |
80bde363 PA |
1003 | void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr, |
1004 | bool have_final); | |
1da177e4 | 1005 | |
cf91a99d | 1006 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 1007 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 1008 | |
1da177e4 LT |
1009 | /* |
1010 | * Extension header (options) processing | |
1011 | */ | |
1012 | ||
5c3a0fd7 | 1013 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
613fa3ca DL |
1014 | u8 *proto, struct in6_addr **daddr_p, |
1015 | struct in6_addr *saddr); | |
5c3a0fd7 JP |
1016 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
1017 | u8 *proto); | |
1da177e4 | 1018 | |
5c3a0fd7 JP |
1019 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
1020 | __be16 *frag_offp); | |
1da177e4 | 1021 | |
5c3a0fd7 | 1022 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 1023 | |
f8f62675 | 1024 | enum { |
9195bb8e AA |
1025 | IP6_FH_F_FRAG = (1 << 0), |
1026 | IP6_FH_F_AUTH = (1 << 1), | |
1027 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
1028 | }; |
1029 | ||
1030 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
1031 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
1032 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 1033 | |
0868383b | 1034 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 1035 | |
5c3a0fd7 JP |
1036 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
1037 | const struct ipv6_txoptions *opt, | |
1038 | struct in6_addr *orig); | |
20c59de2 | 1039 | |
1da177e4 LT |
1040 | /* |
1041 | * socket options (ipv6_sockglue.c) | |
1042 | */ | |
1043 | ||
5c3a0fd7 JP |
1044 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
1045 | char __user *optval, unsigned int optlen); | |
1046 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1047 | char __user *optval, int __user *optlen); | |
1048 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
1049 | char __user *optval, unsigned int optlen); | |
1050 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1051 | char __user *optval, int __user *optlen); | |
1052 | ||
0382a25a GN |
1053 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, |
1054 | int addr_len); | |
5c3a0fd7 | 1055 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
82b276cd HFS |
1056 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
1057 | int addr_len); | |
33c162a9 | 1058 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 1059 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 1060 | |
85fbaa75 HFS |
1061 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
1062 | int *addr_len); | |
1063 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
1064 | int *addr_len); | |
5c3a0fd7 JP |
1065 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1066 | u32 info, u8 *payload); | |
1067 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
1068 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1069 | ||
1070 | int inet6_release(struct socket *sock); | |
1071 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
9b2c45d4 | 1072 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
5c3a0fd7 JP |
1073 | int peer); |
1074 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
1075 | ||
1076 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
1077 | struct sock *sk); |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * reassembly.c | |
1081 | */ | |
90ddc4f0 ED |
1082 | extern const struct proto_ops inet6_stream_ops; |
1083 | extern const struct proto_ops inet6_dgram_ops; | |
77d4b1d3 | 1084 | extern const struct proto_ops inet6_sockraw_ops; |
20380731 | 1085 | |
14c85021 ACM |
1086 | struct group_source_req; |
1087 | struct group_filter; | |
1088 | ||
5c3a0fd7 JP |
1089 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1090 | struct group_source_req *pgsr); | |
1091 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
1092 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
1093 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
1094 | |
1095 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1096 | int ac6_proc_init(struct net *net); |
1097 | void ac6_proc_exit(struct net *net); | |
1098 | int raw6_proc_init(void); | |
1099 | void raw6_proc_exit(void); | |
1100 | int tcp6_proc_init(struct net *net); | |
1101 | void tcp6_proc_exit(struct net *net); | |
1102 | int udp6_proc_init(struct net *net); | |
1103 | void udp6_proc_exit(struct net *net); | |
1104 | int udplite6_proc_init(void); | |
1105 | void udplite6_proc_exit(void); | |
1106 | int ipv6_misc_proc_init(void); | |
1107 | void ipv6_misc_proc_exit(void); | |
1108 | int snmp6_register_dev(struct inet6_dev *idev); | |
1109 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1110 | |
7f7d9a6b | 1111 | #else |
6ab57e7e DL |
1112 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1113 | static inline void ac6_proc_exit(struct net *net) { } | |
1114 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1115 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1116 | #endif |
1da177e4 | 1117 | |
20380731 | 1118 | #ifdef CONFIG_SYSCTL |
5c3a0fd7 JP |
1119 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1120 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1121 | int ipv6_sysctl_register(void); | |
1122 | void ipv6_sysctl_unregister(void); | |
20380731 | 1123 | #endif |
1da177e4 | 1124 | |
46a4dee0 MC |
1125 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1126 | const struct in6_addr *addr); | |
c7ea20c9 HL |
1127 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
1128 | const struct in6_addr *addr, unsigned int mode); | |
46a4dee0 MC |
1129 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1130 | const struct in6_addr *addr); | |
20380731 | 1131 | #endif /* _NET_IPV6_H */ |