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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 | 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 WW |
296 | struct ipcm6_cookie { |
297 | __s16 hlimit; | |
298 | __s16 tclass; | |
299 | __s8 dontfrag; | |
300 | struct ipv6_txoptions *opt; | |
bec1f6f6 | 301 | __u16 gso_size; |
26879da5 WW |
302 | }; |
303 | ||
45f6fad8 ED |
304 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
305 | { | |
306 | struct ipv6_txoptions *opt; | |
307 | ||
308 | rcu_read_lock(); | |
309 | opt = rcu_dereference(np->opt); | |
e550785c | 310 | if (opt) { |
0aeea21a | 311 | if (!refcount_inc_not_zero(&opt->refcnt)) |
e550785c BP |
312 | opt = NULL; |
313 | else | |
314 | opt = rcu_pointer_handoff(opt); | |
315 | } | |
45f6fad8 ED |
316 | rcu_read_unlock(); |
317 | return opt; | |
318 | } | |
319 | ||
320 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
321 | { | |
0aeea21a | 322 | if (opt && refcount_dec_and_test(&opt->refcnt)) |
45f6fad8 ED |
323 | kfree_rcu(opt, rcu); |
324 | } | |
325 | ||
5c3a0fd7 JP |
326 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
327 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, | |
328 | struct ip6_flowlabel *fl, | |
329 | struct ipv6_txoptions *fopt); | |
330 | void fl6_free_socklist(struct sock *sk); | |
331 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
46e5f401 FF |
332 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
333 | int flags); | |
5c3a0fd7 JP |
334 | int ip6_flowlabel_init(void); |
335 | void ip6_flowlabel_cleanup(void); | |
e9191ffb | 336 | bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np); |
1da177e4 LT |
337 | |
338 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
339 | { | |
340 | if (fl) | |
341 | atomic_dec(&fl->users); | |
342 | } | |
343 | ||
5c3a0fd7 | 344 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 345 | |
4e64b1ed JP |
346 | void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
347 | struct icmp6hdr *thdr, int len); | |
6d0bfe22 | 348 | |
5c3a0fd7 | 349 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 350 | |
5c3a0fd7 | 351 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 352 | |
5c3a0fd7 JP |
353 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
354 | struct ipv6_txoptions *opt); | |
355 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
356 | struct ipv6_txoptions *opt, | |
357 | int newtype, | |
a9ba23d4 | 358 | struct ipv6_opt_hdr *newopt); |
df9890c3 YH |
359 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
360 | struct ipv6_txoptions *opt); | |
1da177e4 | 361 | |
a224772d ED |
362 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
363 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
364 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
365 | struct ipv6_txoptions *opt); | |
399c07de | 366 | |
aeaf6e9d SL |
367 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
368 | { | |
369 | /* If forwarding is enabled, RA are not accepted unless the special | |
370 | * hybrid mode (accept_ra=2) is enabled. | |
371 | */ | |
372 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
373 | idev->cnf.accept_ra; | |
374 | } | |
375 | ||
c2a93660 JDB |
376 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
377 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 378 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 379 | |
5c3a0fd7 | 380 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
381 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
382 | { | |
383 | return __ipv6_addr_type(addr) & 0xffff; | |
384 | } | |
1da177e4 LT |
385 | |
386 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
387 | { | |
b1cacb68 YH |
388 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
389 | } | |
390 | ||
391 | static inline int __ipv6_addr_src_scope(int type) | |
392 | { | |
a02cec21 | 393 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
394 | } |
395 | ||
396 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
397 | { | |
398 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
399 | } |
400 | ||
b7ef213e HFS |
401 | static inline bool __ipv6_addr_needs_scope_id(int type) |
402 | { | |
403 | return type & IPV6_ADDR_LINKLOCAL || | |
404 | (type & IPV6_ADDR_MULTICAST && | |
405 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
406 | } | |
407 | ||
408 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
409 | { | |
410 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
411 | } | |
412 | ||
1da177e4 LT |
413 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
414 | { | |
db3459d1 | 415 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
416 | } |
417 | ||
1a203cb3 | 418 | static inline bool |
f2ffd9ee PM |
419 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
420 | const struct in6_addr *a2) | |
421 | { | |
1a203cb3 ED |
422 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
423 | const unsigned long *ul1 = (const unsigned long *)a1; | |
424 | const unsigned long *ulm = (const unsigned long *)m; | |
425 | const unsigned long *ul2 = (const unsigned long *)a2; | |
426 | ||
427 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
428 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
429 | #else | |
a02cec21 ED |
430 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
431 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
432 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
433 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 434 | #endif |
f2ffd9ee PM |
435 | } |
436 | ||
82695b30 | 437 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
1da177e4 LT |
438 | const struct in6_addr *addr, |
439 | int plen) | |
440 | { | |
441 | /* caller must guarantee 0 <= plen <= 128 */ | |
442 | int o = plen >> 3, | |
443 | b = plen & 0x7; | |
444 | ||
db3459d1 | 445 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 446 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 447 | if (b != 0) |
1da177e4 | 448 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
449 | } |
450 | ||
818f1f3e AA |
451 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
452 | const struct in6_addr *pfx, | |
453 | int plen) | |
454 | { | |
455 | /* caller must guarantee 0 <= plen <= 128 */ | |
456 | int o = plen >> 3, | |
457 | b = plen & 0x7; | |
458 | ||
459 | memcpy(addr->s6_addr, pfx, o); | |
460 | if (b != 0) { | |
461 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
462 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
463 | } | |
464 | } | |
465 | ||
5206c579 YH |
466 | static inline void __ipv6_addr_set_half(__be32 *addr, |
467 | __be32 wh, __be32 wl) | |
468 | { | |
469 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
470 | #if defined(__BIG_ENDIAN) | |
471 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
472 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
473 | return; | |
474 | } | |
475 | #elif defined(__LITTLE_ENDIAN) | |
476 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
477 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
478 | return; | |
479 | } | |
480 | #endif | |
481 | #endif | |
482 | addr[0] = wh; | |
483 | addr[1] = wl; | |
484 | } | |
485 | ||
82695b30 | 486 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
487 | __be32 w1, __be32 w2, |
488 | __be32 w3, __be32 w4) | |
1da177e4 | 489 | { |
5206c579 YH |
490 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
491 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 492 | } |
1da177e4 | 493 | |
92113bfd ED |
494 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
495 | const struct in6_addr *a2) | |
1da177e4 | 496 | { |
1a203cb3 ED |
497 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
498 | const unsigned long *ul1 = (const unsigned long *)a1; | |
499 | const unsigned long *ul2 = (const unsigned long *)a2; | |
500 | ||
501 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
502 | #else | |
a02cec21 ED |
503 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
504 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
505 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
506 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 507 | #endif |
1da177e4 LT |
508 | } |
509 | ||
38675170 YH |
510 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
511 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
512 | const __be64 *a2, | |
513 | unsigned int len) | |
514 | { | |
512613d7 | 515 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
516 | return false; |
517 | return true; | |
518 | } | |
519 | ||
520 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
521 | const struct in6_addr *addr2, | |
522 | unsigned int prefixlen) | |
523 | { | |
524 | const __be64 *a1 = (const __be64 *)addr1; | |
525 | const __be64 *a2 = (const __be64 *)addr2; | |
526 | ||
527 | if (prefixlen >= 64) { | |
528 | if (a1[0] ^ a2[0]) | |
529 | return false; | |
530 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
531 | } | |
532 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
533 | } | |
534 | #else | |
2ef97332 YH |
535 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
536 | const struct in6_addr *addr2, | |
537 | unsigned int prefixlen) | |
1da177e4 | 538 | { |
2ef97332 YH |
539 | const __be32 *a1 = addr1->s6_addr32; |
540 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 541 | unsigned int pdw, pbi; |
1da177e4 LT |
542 | |
543 | /* check complete u32 in prefix */ | |
544 | pdw = prefixlen >> 5; | |
545 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 546 | return false; |
1da177e4 LT |
547 | |
548 | /* check incomplete u32 in prefix */ | |
549 | pbi = prefixlen & 0x1f; | |
550 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 551 | return false; |
1da177e4 | 552 | |
92113bfd | 553 | return true; |
1da177e4 | 554 | } |
38675170 | 555 | #endif |
1da177e4 | 556 | |
2588fe1d | 557 | struct inet_frag_queue; |
2588fe1d | 558 | |
0b5ccb2e PM |
559 | enum ip6_defrag_users { |
560 | IP6_DEFRAG_LOCAL_DELIVER, | |
561 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 562 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 563 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 564 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 565 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 566 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
567 | }; |
568 | ||
36c77782 | 569 | void ip6_frag_init(struct inet_frag_queue *q, const void *a); |
648700f7 | 570 | extern const struct rhashtable_params ip6_rhash_params; |
c6fda282 | 571 | |
b836c99f AW |
572 | /* |
573 | * Equivalent of ipv4 struct ip | |
574 | */ | |
575 | struct frag_queue { | |
576 | struct inet_frag_queue q; | |
577 | ||
b836c99f | 578 | int iif; |
b836c99f | 579 | __u16 nhoffset; |
eec2e618 | 580 | u8 ecn; |
b836c99f AW |
581 | }; |
582 | ||
093ba729 | 583 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq); |
b836c99f | 584 | |
92113bfd | 585 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 586 | { |
1a203cb3 ED |
587 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
588 | const unsigned long *ul = (const unsigned long *)a; | |
589 | ||
590 | return (ul[0] | ul[1]) == 0UL; | |
591 | #else | |
a02cec21 ED |
592 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
593 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 594 | #endif |
1da177e4 LT |
595 | } |
596 | ||
ddbe5032 ED |
597 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
598 | { | |
599 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
600 | const unsigned long *ul = (const unsigned long *)a; | |
601 | unsigned long x = ul[0] ^ ul[1]; | |
602 | ||
603 | return (u32)(x ^ (x >> 32)); | |
604 | #else | |
605 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
606 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
607 | #endif | |
608 | } | |
609 | ||
08dcdbf6 | 610 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 611 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
612 | { |
613 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
614 | ||
615 | return jhash_3words(v, | |
616 | (__force u32)a->s6_addr32[2], | |
617 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 618 | initval); |
08dcdbf6 ED |
619 | } |
620 | ||
92113bfd | 621 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 622 | { |
e287656b | 623 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 624 | const __be64 *be = (const __be64 *)a; |
e287656b | 625 | |
1373a773 | 626 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 627 | #else |
a02cec21 | 628 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 629 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 630 | #endif |
f630e43a YH |
631 | } |
632 | ||
1373a773 JL |
633 | /* |
634 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
635 | * since all of the endian-annotated types are fixed size regardless of arch. | |
636 | */ | |
92113bfd | 637 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 638 | { |
a04d40b8 YH |
639 | return ( |
640 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 641 | *(unsigned long *)a | |
a04d40b8 | 642 | #else |
1373a773 | 643 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 644 | #endif |
1373a773 JL |
645 | (__force unsigned long)(a->s6_addr32[2] ^ |
646 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
647 | } |
648 | ||
f0b1e64c MKL |
649 | static inline u32 ipv6_portaddr_hash(const struct net *net, |
650 | const struct in6_addr *addr6, | |
651 | unsigned int port) | |
652 | { | |
653 | unsigned int hash, mix = net_hash_mix(net); | |
654 | ||
655 | if (ipv6_addr_any(addr6)) | |
656 | hash = jhash_1word(0, mix); | |
657 | else if (ipv6_addr_v4mapped(addr6)) | |
658 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); | |
659 | else | |
660 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); | |
661 | ||
662 | return hash ^ port; | |
663 | } | |
664 | ||
99cd07a5 JMT |
665 | /* |
666 | * Check for a RFC 4843 ORCHID address | |
667 | * (Overlay Routable Cryptographic Hash Identifiers) | |
668 | */ | |
92113bfd | 669 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 670 | { |
a02cec21 | 671 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
672 | } |
673 | ||
5c98631c LC |
674 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
675 | { | |
676 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
677 | } | |
678 | ||
f15364bd AC |
679 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
680 | struct in6_addr *v4mapped) | |
681 | { | |
682 | ipv6_addr_set(v4mapped, | |
683 | 0, 0, | |
684 | htonl(0x0000FFFF), | |
685 | addr); | |
686 | } | |
687 | ||
971f359d YH |
688 | /* |
689 | * find the first different bit between two addresses | |
690 | * length of address must be a multiple of 32bits | |
691 | */ | |
9f2e7334 | 692 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 693 | { |
ef296f56 | 694 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
695 | int i; |
696 | ||
697 | addrlen >>= 2; | |
698 | ||
699 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
700 | __be32 xb = a1[i] ^ a2[i]; |
701 | if (xb) | |
d57b8fb8 | 702 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
703 | } |
704 | ||
705 | /* | |
82695b30 | 706 | * we should *never* get to this point since that |
971f359d YH |
707 | * would mean the addrs are equal |
708 | * | |
709 | * However, we do get to it 8) And exacly, when | |
710 | * addresses are equal 8) | |
711 | * | |
712 | * ip route add 1111::/128 via ... | |
713 | * ip route add 1111::/64 via ... | |
714 | * and we are here. | |
715 | * | |
716 | * Ideally, this function should stop comparison | |
717 | * at prefix length. It does not, but it is still OK, | |
718 | * if returned value is greater than prefix length. | |
719 | * --ANK (980803) | |
720 | */ | |
a02cec21 | 721 | return addrlen << 5; |
971f359d YH |
722 | } |
723 | ||
9f2e7334 YH |
724 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
725 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
726 | { | |
727 | const __be64 *a1 = token1, *a2 = token2; | |
728 | int i; | |
729 | ||
730 | addrlen >>= 3; | |
731 | ||
732 | for (i = 0; i < addrlen; i++) { | |
733 | __be64 xb = a1[i] ^ a2[i]; | |
734 | if (xb) | |
735 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
736 | } | |
737 | ||
738 | return addrlen << 6; | |
739 | } | |
740 | #endif | |
741 | ||
742 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
743 | { | |
744 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
745 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
746 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
747 | #endif | |
748 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
749 | } | |
750 | ||
971f359d YH |
751 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
752 | { | |
753 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
754 | } | |
755 | ||
7f159867 ED |
756 | __be32 ipv6_select_ident(struct net *net, |
757 | const struct in6_addr *daddr, | |
758 | const struct in6_addr *saddr); | |
0c19f846 | 759 | __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 760 | |
5c3a0fd7 | 761 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 762 | |
5c98631c LC |
763 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
764 | struct dst_entry *dst) | |
765 | { | |
766 | int hlimit; | |
767 | ||
768 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
769 | hlimit = np->mcast_hops; | |
770 | else | |
771 | hlimit = np->hop_limit; | |
772 | if (hlimit < 0) | |
773 | hlimit = ip6_dst_hoplimit(dst); | |
774 | return hlimit; | |
775 | } | |
776 | ||
c3f83241 TH |
777 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
778 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
779 | * flow->v6addrs.dst = iph->daddr; | |
780 | */ | |
781 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
782 | const struct ipv6hdr *iph) | |
783 | { | |
784 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
785 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
786 | sizeof(flow->addrs.v6addrs.src)); | |
787 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
788 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
789 | } | |
790 | ||
a37934fc | 791 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 TH |
792 | |
793 | /* Sysctl settings for net ipv6.auto_flowlabels */ | |
794 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
795 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
796 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
797 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
798 | ||
799 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
800 | ||
b5677416 | 801 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 802 | |
cb1ce2ef | 803 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
804 | __be32 flowlabel, bool autolabel, |
805 | struct flowi6 *fl6) | |
cb1ce2ef | 806 | { |
42240901 | 807 | u32 hash; |
cb1ce2ef | 808 | |
90427ef5 DM |
809 | /* @flowlabel may include more than a flow label, eg, the traffic class. |
810 | * Here we want only the flow label value. | |
811 | */ | |
812 | flowlabel &= IPV6_FLOWLABEL_MASK; | |
813 | ||
42240901 TH |
814 | if (flowlabel || |
815 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
816 | (!autolabel && | |
817 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
818 | return flowlabel; | |
cb1ce2ef | 819 | |
42240901 | 820 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 821 | |
42240901 TH |
822 | /* Since this is being sent on the wire obfuscate hash a bit |
823 | * to minimize possbility that any useful information to an | |
824 | * attacker is leaked. Only lower 20 bits are relevant. | |
825 | */ | |
826 | rol32(hash, 16); | |
82a584b7 | 827 | |
42240901 TH |
828 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
829 | ||
830 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
831 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
832 | |
833 | return flowlabel; | |
834 | } | |
42240901 TH |
835 | |
836 | static inline int ip6_default_np_autolabel(struct net *net) | |
837 | { | |
838 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
839 | case IP6_AUTO_FLOW_LABEL_OFF: | |
840 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
841 | default: | |
842 | return 0; | |
843 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
844 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
845 | return 1; | |
846 | } | |
847 | } | |
a37934fc FF |
848 | #else |
849 | static inline void ip6_set_txhash(struct sock *sk) { } | |
850 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
42240901 TH |
851 | __be32 flowlabel, bool autolabel, |
852 | struct flowi6 *fl6) | |
a37934fc FF |
853 | { |
854 | return flowlabel; | |
855 | } | |
42240901 TH |
856 | static inline int ip6_default_np_autolabel(struct net *net) |
857 | { | |
858 | return 0; | |
859 | } | |
a37934fc FF |
860 | #endif |
861 | ||
918ee507 PM |
862 | #if IS_ENABLED(CONFIG_IPV6) |
863 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
864 | { | |
865 | return net->ipv6.sysctl.multipath_hash_policy; | |
866 | } | |
867 | #else | |
868 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
869 | { | |
870 | return 0; | |
871 | } | |
872 | #endif | |
cb1ce2ef | 873 | |
3e4e4c1f YH |
874 | /* |
875 | * Header manipulation | |
876 | */ | |
877 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
878 | __be32 flowlabel) | |
879 | { | |
07f623d3 | 880 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
881 | } |
882 | ||
6502ca52 YH |
883 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
884 | { | |
885 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
886 | } | |
887 | ||
3308de2b FF |
888 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
889 | { | |
890 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
891 | } | |
892 | ||
d76ed22b LR |
893 | static inline u8 ip6_tclass(__be32 flowinfo) |
894 | { | |
895 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
896 | } | |
eaa93bf4 DB |
897 | |
898 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) | |
899 | { | |
900 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
901 | } | |
902 | ||
fa1be7e0 MK |
903 | static inline __be32 flowi6_get_flowlabel(const struct flowi6 *fl6) |
904 | { | |
905 | return fl6->flowlabel & IPV6_FLOWLABEL_MASK; | |
906 | } | |
907 | ||
1da177e4 LT |
908 | /* |
909 | * Prototypes exported by ipv6 | |
910 | */ | |
911 | ||
912 | /* | |
913 | * rcv function (called from netdevice level) | |
914 | */ | |
915 | ||
5c3a0fd7 JP |
916 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
917 | struct packet_type *pt, struct net_device *orig_dev); | |
1da177e4 | 918 | |
0c4b51f0 | 919 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 920 | |
1da177e4 LT |
921 | /* |
922 | * upper-layer output functions | |
923 | */ | |
1c1e9d2b | 924 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
92e55f41 | 925 | __u32 mark, struct ipv6_txoptions *opt, int tclass); |
5c3a0fd7 JP |
926 | |
927 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
928 | ||
929 | int ip6_append_data(struct sock *sk, | |
930 | int getfrag(void *from, char *to, int offset, int len, | |
931 | int odd, struct sk_buff *skb), | |
26879da5 WW |
932 | void *from, int length, int transhdrlen, |
933 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, | |
934 | struct rt6_info *rt, unsigned int flags, | |
c14ac945 | 935 | const struct sockcm_cookie *sockc); |
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, | |
1cd7884d | 952 | struct inet_cork_full *cork, |
c14ac945 | 953 | const struct sockcm_cookie *sockc); |
6422398c VY |
954 | |
955 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
956 | { | |
957 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
958 | &inet6_sk(sk)->cork); | |
959 | } | |
960 | ||
343d60aa RP |
961 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
962 | struct flowi6 *fl6); | |
3aef934f | 963 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 964 | const struct in6_addr *final_dst); |
5c3a0fd7 | 965 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
96818159 AK |
966 | const struct in6_addr *final_dst, |
967 | bool connected); | |
5c3a0fd7 JP |
968 | struct dst_entry *ip6_blackhole_route(struct net *net, |
969 | struct dst_entry *orig_dst); | |
1da177e4 LT |
970 | |
971 | /* | |
972 | * skb processing functions | |
973 | */ | |
974 | ||
ede2059d | 975 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
976 | int ip6_forward(struct sk_buff *skb); |
977 | int ip6_input(struct sk_buff *skb); | |
978 | int ip6_mc_input(struct sk_buff *skb); | |
1da177e4 | 979 | |
cf91a99d | 980 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 981 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 982 | |
1da177e4 LT |
983 | /* |
984 | * Extension header (options) processing | |
985 | */ | |
986 | ||
5c3a0fd7 | 987 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
613fa3ca DL |
988 | u8 *proto, struct in6_addr **daddr_p, |
989 | struct in6_addr *saddr); | |
5c3a0fd7 JP |
990 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
991 | u8 *proto); | |
1da177e4 | 992 | |
5c3a0fd7 JP |
993 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
994 | __be16 *frag_offp); | |
1da177e4 | 995 | |
5c3a0fd7 | 996 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 997 | |
f8f62675 | 998 | enum { |
9195bb8e AA |
999 | IP6_FH_F_FRAG = (1 << 0), |
1000 | IP6_FH_F_AUTH = (1 << 1), | |
1001 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
1002 | }; |
1003 | ||
1004 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
1005 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
1006 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 1007 | |
0868383b | 1008 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 1009 | |
5c3a0fd7 JP |
1010 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
1011 | const struct ipv6_txoptions *opt, | |
1012 | struct in6_addr *orig); | |
20c59de2 | 1013 | |
1da177e4 LT |
1014 | /* |
1015 | * socket options (ipv6_sockglue.c) | |
1016 | */ | |
1017 | ||
5c3a0fd7 JP |
1018 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
1019 | char __user *optval, unsigned int optlen); | |
1020 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1021 | char __user *optval, int __user *optlen); | |
1022 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
1023 | char __user *optval, unsigned int optlen); | |
1024 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
1025 | char __user *optval, int __user *optlen); | |
1026 | ||
0382a25a GN |
1027 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, |
1028 | int addr_len); | |
5c3a0fd7 | 1029 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
82b276cd HFS |
1030 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
1031 | int addr_len); | |
33c162a9 | 1032 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 1033 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 1034 | |
85fbaa75 HFS |
1035 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
1036 | int *addr_len); | |
1037 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
1038 | int *addr_len); | |
5c3a0fd7 JP |
1039 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1040 | u32 info, u8 *payload); | |
1041 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
1042 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1043 | ||
1044 | int inet6_release(struct socket *sock); | |
1045 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
9b2c45d4 | 1046 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
5c3a0fd7 JP |
1047 | int peer); |
1048 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
1049 | ||
1050 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c ACM |
1051 | struct sock *sk); |
1052 | ||
1da177e4 LT |
1053 | /* |
1054 | * reassembly.c | |
1055 | */ | |
90ddc4f0 ED |
1056 | extern const struct proto_ops inet6_stream_ops; |
1057 | extern const struct proto_ops inet6_dgram_ops; | |
77d4b1d3 | 1058 | extern const struct proto_ops inet6_sockraw_ops; |
20380731 | 1059 | |
14c85021 ACM |
1060 | struct group_source_req; |
1061 | struct group_filter; | |
1062 | ||
5c3a0fd7 JP |
1063 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1064 | struct group_source_req *pgsr); | |
1065 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
1066 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
1067 | struct group_filter __user *optval, int __user *optlen); | |
20380731 ACM |
1068 | |
1069 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1070 | int ac6_proc_init(struct net *net); |
1071 | void ac6_proc_exit(struct net *net); | |
1072 | int raw6_proc_init(void); | |
1073 | void raw6_proc_exit(void); | |
1074 | int tcp6_proc_init(struct net *net); | |
1075 | void tcp6_proc_exit(struct net *net); | |
1076 | int udp6_proc_init(struct net *net); | |
1077 | void udp6_proc_exit(struct net *net); | |
1078 | int udplite6_proc_init(void); | |
1079 | void udplite6_proc_exit(void); | |
1080 | int ipv6_misc_proc_init(void); | |
1081 | void ipv6_misc_proc_exit(void); | |
1082 | int snmp6_register_dev(struct inet6_dev *idev); | |
1083 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1084 | |
7f7d9a6b | 1085 | #else |
6ab57e7e DL |
1086 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1087 | static inline void ac6_proc_exit(struct net *net) { } | |
1088 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1089 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1090 | #endif |
1da177e4 | 1091 | |
20380731 | 1092 | #ifdef CONFIG_SYSCTL |
9e8cda3b | 1093 | extern struct ctl_table ipv6_route_table_template[]; |
1da177e4 | 1094 | |
5c3a0fd7 JP |
1095 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1096 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1097 | int ipv6_sysctl_register(void); | |
1098 | void ipv6_sysctl_unregister(void); | |
20380731 | 1099 | #endif |
1da177e4 | 1100 | |
46a4dee0 MC |
1101 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1102 | const struct in6_addr *addr); | |
c7ea20c9 HL |
1103 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
1104 | const struct in6_addr *addr, unsigned int mode); | |
46a4dee0 MC |
1105 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1106 | const struct in6_addr *addr); | |
20380731 | 1107 | #endif /* _NET_IPV6_H */ |