Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
1da177e4 LT |
7 | */ |
8 | ||
9 | #ifndef _NET_IPV6_H | |
10 | #define _NET_IPV6_H | |
11 | ||
12 | #include <linux/ipv6.h> | |
13 | #include <linux/hardirq.h> | |
08dcdbf6 | 14 | #include <linux/jhash.h> |
0aeea21a | 15 | #include <linux/refcount.h> |
59c820b2 | 16 | #include <linux/jump_label_ratelimit.h> |
20283d84 | 17 | #include <net/if_inet6.h> |
1da177e4 | 18 | #include <net/flow.h> |
1bd758eb | 19 | #include <net/flow_dissector.h> |
a410a0cf | 20 | #include <net/inet_dscp.h> |
1da177e4 | 21 | #include <net/snmp.h> |
f0b1e64c | 22 | #include <net/netns/hash.h> |
1da177e4 | 23 | |
b6459415 JK |
24 | struct ip_tunnel_info; |
25 | ||
1da177e4 LT |
26 | #define SIN6_LEN_RFC2133 24 |
27 | ||
28 | #define IPV6_MAXPLEN 65535 | |
29 | ||
30 | /* | |
31 | * NextHeader field of IPv6 header | |
32 | */ | |
33 | ||
34 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ | |
ee90c6ba | 35 | #define NEXTHDR_IPV4 4 /* IPv4 in IPv6 */ |
1da177e4 LT |
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 | ||
7c96d8ec ED |
154 | /* |
155 | * Jumbo payload option, as described in RFC 2675 2. | |
156 | */ | |
157 | struct hop_jumbo_hdr { | |
158 | u8 nexthdr; | |
159 | u8 hdrlen; | |
160 | u8 tlv_type; /* IPV6_TLV_JUMBO, 0xC2 */ | |
161 | u8 tlv_len; /* 4 */ | |
162 | __be32 jumbo_payload_len; | |
163 | }; | |
164 | ||
1431fb31 PD |
165 | #define IP6_MF 0x0001 |
166 | #define IP6_OFFSET 0xFFF8 | |
1da177e4 | 167 | |
0feca619 PNA |
168 | struct ip6_fraglist_iter { |
169 | struct ipv6hdr *tmp_hdr; | |
0feca619 PNA |
170 | struct sk_buff *frag; |
171 | int offset; | |
172 | unsigned int hlen; | |
173 | __be32 frag_id; | |
174 | u8 nexthdr; | |
175 | }; | |
176 | ||
177 | int ip6_fraglist_init(struct sk_buff *skb, unsigned int hlen, u8 *prevhdr, | |
178 | u8 nexthdr, __be32 frag_id, | |
179 | struct ip6_fraglist_iter *iter); | |
180 | void ip6_fraglist_prepare(struct sk_buff *skb, struct ip6_fraglist_iter *iter); | |
181 | ||
182 | static inline struct sk_buff *ip6_fraglist_next(struct ip6_fraglist_iter *iter) | |
183 | { | |
184 | struct sk_buff *skb = iter->frag; | |
185 | ||
186 | iter->frag = skb->next; | |
187 | skb_mark_not_on_list(skb); | |
188 | ||
189 | return skb; | |
190 | } | |
191 | ||
8a6a1f17 PNA |
192 | struct ip6_frag_state { |
193 | u8 *prevhdr; | |
194 | unsigned int hlen; | |
195 | unsigned int mtu; | |
196 | unsigned int left; | |
197 | int offset; | |
198 | int ptr; | |
199 | int hroom; | |
200 | int troom; | |
201 | __be32 frag_id; | |
202 | u8 nexthdr; | |
203 | }; | |
204 | ||
205 | void ip6_frag_init(struct sk_buff *skb, unsigned int hlen, unsigned int mtu, | |
206 | unsigned short needed_tailroom, int hdr_room, u8 *prevhdr, | |
207 | u8 nexthdr, __be32 frag_id, struct ip6_frag_state *state); | |
208 | struct sk_buff *ip6_frag_next(struct sk_buff *skb, | |
209 | struct ip6_frag_state *state); | |
210 | ||
e110861f LC |
211 | #define IP6_REPLY_MARK(net, mark) \ |
212 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) | |
213 | ||
1da177e4 LT |
214 | #include <net/sock.h> |
215 | ||
216 | /* sysctls */ | |
1da177e4 | 217 | extern int sysctl_mld_max_msf; |
2f711939 | 218 | extern int sysctl_mld_qrv; |
3d7cc2ba | 219 | |
13415e46 | 220 | #define _DEVINC(net, statname, mod, idev, field) \ |
14878f75 | 221 | ({ \ |
a11d206d YH |
222 | struct inet6_dev *_idev = (idev); \ |
223 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
224 | mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\ |
225 | mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\ | |
a11d206d | 226 | }) |
14878f75 | 227 | |
be281e55 | 228 | /* per device counters are atomic_long_t */ |
13415e46 | 229 | #define _DEVINCATOMIC(net, statname, mod, idev, field) \ |
be281e55 ED |
230 | ({ \ |
231 | struct inet6_dev *_idev = (idev); \ | |
232 | if (likely(_idev != NULL)) \ | |
233 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
13415e46 | 234 | mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\ |
be281e55 ED |
235 | }) |
236 | ||
2a24444f ED |
237 | /* per device and per net counters are atomic_long_t */ |
238 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
239 | ({ \ | |
240 | struct inet6_dev *_idev = (idev); \ | |
241 | if (likely(_idev != NULL)) \ | |
242 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
243 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
244 | }) | |
245 | ||
13415e46 | 246 | #define _DEVADD(net, statname, mod, idev, field, val) \ |
8e7999c4 PE |
247 | ({ \ |
248 | struct inet6_dev *_idev = (idev); \ | |
249 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
250 | mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \ |
251 | mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\ | |
8e7999c4 PE |
252 | }) |
253 | ||
13415e46 | 254 | #define _DEVUPD(net, statname, mod, idev, field, val) \ |
edf391ff NH |
255 | ({ \ |
256 | struct inet6_dev *_idev = (idev); \ | |
257 | if (likely(_idev != NULL)) \ | |
13415e46 ED |
258 | mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \ |
259 | mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\ | |
edf391ff NH |
260 | }) |
261 | ||
14878f75 | 262 | /* MIBs */ |
14878f75 | 263 | |
087fe240 | 264 | #define IP6_INC_STATS(net, idev,field) \ |
13415e46 | 265 | _DEVINC(net, ipv6, , idev, field) |
1d015503 | 266 | #define __IP6_INC_STATS(net, idev,field) \ |
13415e46 | 267 | _DEVINC(net, ipv6, __, idev, field) |
edf391ff | 268 | #define IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 269 | _DEVADD(net, ipv6, , idev, field, val) |
1d015503 | 270 | #define __IP6_ADD_STATS(net, idev,field,val) \ |
13415e46 | 271 | _DEVADD(net, ipv6, __, idev, field, val) |
edf391ff | 272 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 273 | _DEVUPD(net, ipv6, , idev, field, val) |
c2005eb0 | 274 | #define __IP6_UPD_PO_STATS(net, idev,field,val) \ |
13415e46 | 275 | _DEVUPD(net, ipv6, __, idev, field, val) |
087fe240 | 276 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 277 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
a16292a0 | 278 | #define __ICMP6_INC_STATS(net, idev, field) \ |
13415e46 | 279 | _DEVINCATOMIC(net, icmpv6, __, idev, field) |
087fe240 DL |
280 | |
281 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 282 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
f3832ed2 | 283 | #define ICMP6MSGIN_INC_STATS(net, idev, field) \ |
2a24444f | 284 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 285 | |
fd2c3ef7 | 286 | struct ip6_ra_chain { |
1da177e4 LT |
287 | struct ip6_ra_chain *next; |
288 | struct sock *sk; | |
289 | int sel; | |
290 | void (*destructor)(struct sock *); | |
291 | }; | |
292 | ||
293 | extern struct ip6_ra_chain *ip6_ra_chain; | |
294 | extern rwlock_t ip6_ra_lock; | |
295 | ||
296 | /* | |
297 | This structure is prepared by protocol, when parsing | |
298 | ancillary data and passed to IPv6. | |
299 | */ | |
300 | ||
fd2c3ef7 | 301 | struct ipv6_txoptions { |
0aeea21a | 302 | refcount_t refcnt; |
1da177e4 LT |
303 | /* Length of this structure */ |
304 | int tot_len; | |
305 | ||
306 | /* length of extension headers */ | |
307 | ||
308 | __u16 opt_flen; /* after fragment hdr */ | |
309 | __u16 opt_nflen; /* before fragment hdr */ | |
310 | ||
311 | struct ipv6_opt_hdr *hopopt; | |
312 | struct ipv6_opt_hdr *dst0opt; | |
313 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 | 314 | struct ipv6_opt_hdr *dst1opt; |
45f6fad8 | 315 | struct rcu_head rcu; |
1da177e4 LT |
316 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
317 | }; | |
318 | ||
a346abe0 ED |
319 | /* flowlabel_reflect sysctl values */ |
320 | enum flowlabel_reflect { | |
321 | FLOWLABEL_REFLECT_ESTABLISHED = 1, | |
322 | FLOWLABEL_REFLECT_TCP_RESET = 2, | |
323 | FLOWLABEL_REFLECT_ICMPV6_ECHO_REPLIES = 4, | |
324 | }; | |
325 | ||
fd2c3ef7 | 326 | struct ip6_flowlabel { |
7f0e44ac | 327 | struct ip6_flowlabel __rcu *next; |
90bcaf7b | 328 | __be32 label; |
db3459d1 | 329 | atomic_t users; |
1da177e4 LT |
330 | struct in6_addr dst; |
331 | struct ipv6_txoptions *opt; | |
1da177e4 | 332 | unsigned long linger; |
d3aedd5e | 333 | struct rcu_head rcu; |
1da177e4 | 334 | u8 share; |
4f82f457 EB |
335 | union { |
336 | struct pid *pid; | |
337 | kuid_t uid; | |
338 | } owner; | |
1da177e4 LT |
339 | unsigned long lastuse; |
340 | unsigned long expires; | |
60e8fbc4 | 341 | struct net *fl_net; |
1da177e4 LT |
342 | }; |
343 | ||
82a584b7 TH |
344 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
345 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
346 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) | |
347 | ||
37cfee90 | 348 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
d76ed22b | 349 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 350 | |
fd2c3ef7 | 351 | struct ipv6_fl_socklist { |
7f0e44ac ED |
352 | struct ipv6_fl_socklist __rcu *next; |
353 | struct ip6_flowlabel *fl; | |
354 | struct rcu_head rcu; | |
1da177e4 LT |
355 | }; |
356 | ||
26879da5 | 357 | struct ipcm6_cookie { |
5fdaa88d | 358 | struct sockcm_cookie sockc; |
26879da5 WW |
359 | __s16 hlimit; |
360 | __s16 tclass; | |
1b31debc | 361 | __u16 gso_size; |
26879da5 WW |
362 | __s8 dontfrag; |
363 | struct ipv6_txoptions *opt; | |
364 | }; | |
365 | ||
b515430a WB |
366 | static inline void ipcm6_init(struct ipcm6_cookie *ipc6) |
367 | { | |
368 | *ipc6 = (struct ipcm6_cookie) { | |
369 | .hlimit = -1, | |
370 | .tclass = -1, | |
371 | .dontfrag = -1, | |
372 | }; | |
373 | } | |
374 | ||
375 | static inline void ipcm6_init_sk(struct ipcm6_cookie *ipc6, | |
376 | const struct ipv6_pinfo *np) | |
377 | { | |
378 | *ipc6 = (struct ipcm6_cookie) { | |
379 | .hlimit = -1, | |
380 | .tclass = np->tclass, | |
381 | .dontfrag = np->dontfrag, | |
382 | }; | |
383 | } | |
384 | ||
45f6fad8 ED |
385 | static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np) |
386 | { | |
387 | struct ipv6_txoptions *opt; | |
388 | ||
389 | rcu_read_lock(); | |
390 | opt = rcu_dereference(np->opt); | |
e550785c | 391 | if (opt) { |
0aeea21a | 392 | if (!refcount_inc_not_zero(&opt->refcnt)) |
e550785c BP |
393 | opt = NULL; |
394 | else | |
395 | opt = rcu_pointer_handoff(opt); | |
396 | } | |
45f6fad8 ED |
397 | rcu_read_unlock(); |
398 | return opt; | |
399 | } | |
400 | ||
401 | static inline void txopt_put(struct ipv6_txoptions *opt) | |
402 | { | |
0aeea21a | 403 | if (opt && refcount_dec_and_test(&opt->refcnt)) |
45f6fad8 ED |
404 | kfree_rcu(opt, rcu); |
405 | } | |
406 | ||
0b0dff5b | 407 | #if IS_ENABLED(CONFIG_IPV6) |
59c820b2 WB |
408 | struct ip6_flowlabel *__fl6_sock_lookup(struct sock *sk, __be32 label); |
409 | ||
410 | extern struct static_key_false_deferred ipv6_flowlabel_exclusive; | |
411 | static inline struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, | |
412 | __be32 label) | |
413 | { | |
0b0dff5b WB |
414 | if (static_branch_unlikely(&ipv6_flowlabel_exclusive.key) && |
415 | READ_ONCE(sock_net(sk)->ipv6.flowlabel_has_excl)) | |
59c820b2 WB |
416 | return __fl6_sock_lookup(sk, label) ? : ERR_PTR(-ENOENT); |
417 | ||
418 | return NULL; | |
419 | } | |
0b0dff5b | 420 | #endif |
59c820b2 | 421 | |
5c3a0fd7 JP |
422 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, |
423 | struct ip6_flowlabel *fl, | |
424 | struct ipv6_txoptions *fopt); | |
425 | void fl6_free_socklist(struct sock *sk); | |
86298285 | 426 | int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen); |
46e5f401 FF |
427 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
428 | int flags); | |
5c3a0fd7 JP |
429 | int ip6_flowlabel_init(void); |
430 | void ip6_flowlabel_cleanup(void); | |
e9191ffb | 431 | bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np); |
1da177e4 LT |
432 | |
433 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
434 | { | |
435 | if (fl) | |
436 | atomic_dec(&fl->users); | |
437 | } | |
438 | ||
5c3a0fd7 | 439 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
b94f1c09 | 440 | |
4e64b1ed JP |
441 | void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
442 | struct icmp6hdr *thdr, int len); | |
6d0bfe22 | 443 | |
5c3a0fd7 | 444 | int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 445 | |
5c3a0fd7 | 446 | int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 | 447 | |
5c3a0fd7 JP |
448 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
449 | struct ipv6_txoptions *opt); | |
450 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, | |
451 | struct ipv6_txoptions *opt, | |
452 | int newtype, | |
a9ba23d4 | 453 | struct ipv6_opt_hdr *newopt); |
31ed2261 PB |
454 | struct ipv6_txoptions *__ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
455 | struct ipv6_txoptions *opt); | |
456 | ||
457 | static inline struct ipv6_txoptions * | |
458 | ipv6_fixup_options(struct ipv6_txoptions *opt_space, struct ipv6_txoptions *opt) | |
459 | { | |
460 | if (!opt) | |
461 | return NULL; | |
462 | return __ipv6_fixup_options(opt_space, opt); | |
463 | } | |
1da177e4 | 464 | |
a224772d ED |
465 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
466 | const struct inet6_skb_parm *opt); | |
ceba1832 HD |
467 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
468 | struct ipv6_txoptions *opt); | |
399c07de | 469 | |
09f3d1a3 ED |
470 | /* This helper is specialized for BIG TCP needs. |
471 | * It assumes the hop_jumbo_hdr will immediately follow the IPV6 header. | |
472 | * It assumes headers are already in skb->head. | |
473 | * Returns 0, or IPPROTO_TCP if a BIG TCP packet is there. | |
474 | */ | |
475 | static inline int ipv6_has_hopopt_jumbo(const struct sk_buff *skb) | |
476 | { | |
477 | const struct hop_jumbo_hdr *jhdr; | |
478 | const struct ipv6hdr *nhdr; | |
479 | ||
0fe79f28 | 480 | if (likely(skb->len <= GRO_LEGACY_MAX_SIZE)) |
09f3d1a3 ED |
481 | return 0; |
482 | ||
483 | if (skb->protocol != htons(ETH_P_IPV6)) | |
484 | return 0; | |
485 | ||
486 | if (skb_network_offset(skb) + | |
487 | sizeof(struct ipv6hdr) + | |
488 | sizeof(struct hop_jumbo_hdr) > skb_headlen(skb)) | |
489 | return 0; | |
490 | ||
491 | nhdr = ipv6_hdr(skb); | |
492 | ||
493 | if (nhdr->nexthdr != NEXTHDR_HOP) | |
494 | return 0; | |
495 | ||
496 | jhdr = (const struct hop_jumbo_hdr *) (nhdr + 1); | |
497 | if (jhdr->tlv_type != IPV6_TLV_JUMBO || jhdr->hdrlen != 0 || | |
498 | jhdr->nexthdr != IPPROTO_TCP) | |
499 | return 0; | |
500 | return jhdr->nexthdr; | |
501 | } | |
502 | ||
aeaf6e9d SL |
503 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
504 | { | |
505 | /* If forwarding is enabled, RA are not accepted unless the special | |
506 | * hybrid mode (accept_ra=2) is enabled. | |
507 | */ | |
508 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : | |
509 | idev->cnf.accept_ra; | |
510 | } | |
511 | ||
c2a93660 JDB |
512 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
513 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ | |
9874c41c | 514 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
1da177e4 | 515 | |
5c3a0fd7 | 516 | int __ipv6_addr_type(const struct in6_addr *addr); |
b1cacb68 YH |
517 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
518 | { | |
519 | return __ipv6_addr_type(addr) & 0xffff; | |
520 | } | |
1da177e4 LT |
521 | |
522 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
523 | { | |
b1cacb68 YH |
524 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
525 | } | |
526 | ||
527 | static inline int __ipv6_addr_src_scope(int type) | |
528 | { | |
a02cec21 | 529 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
530 | } |
531 | ||
532 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
533 | { | |
534 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
535 | } |
536 | ||
b7ef213e HFS |
537 | static inline bool __ipv6_addr_needs_scope_id(int type) |
538 | { | |
539 | return type & IPV6_ADDR_LINKLOCAL || | |
540 | (type & IPV6_ADDR_MULTICAST && | |
541 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); | |
542 | } | |
543 | ||
544 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) | |
545 | { | |
546 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; | |
547 | } | |
548 | ||
1da177e4 LT |
549 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
550 | { | |
db3459d1 | 551 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
552 | } |
553 | ||
1a203cb3 | 554 | static inline bool |
f2ffd9ee PM |
555 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
556 | const struct in6_addr *a2) | |
557 | { | |
1a203cb3 ED |
558 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
559 | const unsigned long *ul1 = (const unsigned long *)a1; | |
560 | const unsigned long *ulm = (const unsigned long *)m; | |
561 | const unsigned long *ul2 = (const unsigned long *)a2; | |
562 | ||
563 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | | |
564 | ((ul1[1] ^ ul2[1]) & ulm[1])); | |
565 | #else | |
a02cec21 ED |
566 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
567 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
568 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
569 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
1a203cb3 | 570 | #endif |
f2ffd9ee PM |
571 | } |
572 | ||
82695b30 | 573 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
1da177e4 LT |
574 | const struct in6_addr *addr, |
575 | int plen) | |
576 | { | |
577 | /* caller must guarantee 0 <= plen <= 128 */ | |
578 | int o = plen >> 3, | |
579 | b = plen & 0x7; | |
580 | ||
db3459d1 | 581 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 582 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 583 | if (b != 0) |
1da177e4 | 584 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
585 | } |
586 | ||
818f1f3e AA |
587 | static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, |
588 | const struct in6_addr *pfx, | |
589 | int plen) | |
590 | { | |
591 | /* caller must guarantee 0 <= plen <= 128 */ | |
592 | int o = plen >> 3, | |
593 | b = plen & 0x7; | |
594 | ||
595 | memcpy(addr->s6_addr, pfx, o); | |
596 | if (b != 0) { | |
597 | addr->s6_addr[o] &= ~(0xff00 >> b); | |
598 | addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); | |
599 | } | |
600 | } | |
601 | ||
5206c579 YH |
602 | static inline void __ipv6_addr_set_half(__be32 *addr, |
603 | __be32 wh, __be32 wl) | |
604 | { | |
605 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
606 | #if defined(__BIG_ENDIAN) | |
607 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { | |
608 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); | |
609 | return; | |
610 | } | |
611 | #elif defined(__LITTLE_ENDIAN) | |
612 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { | |
613 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); | |
614 | return; | |
615 | } | |
616 | #endif | |
617 | #endif | |
618 | addr[0] = wh; | |
619 | addr[1] = wl; | |
620 | } | |
621 | ||
82695b30 | 622 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
623 | __be32 w1, __be32 w2, |
624 | __be32 w3, __be32 w4) | |
1da177e4 | 625 | { |
5206c579 YH |
626 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
627 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); | |
1da177e4 | 628 | } |
1da177e4 | 629 | |
92113bfd ED |
630 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
631 | const struct in6_addr *a2) | |
1da177e4 | 632 | { |
1a203cb3 ED |
633 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
634 | const unsigned long *ul1 = (const unsigned long *)a1; | |
635 | const unsigned long *ul2 = (const unsigned long *)a2; | |
636 | ||
637 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
638 | #else | |
a02cec21 ED |
639 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
640 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
641 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
642 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1a203cb3 | 643 | #endif |
1da177e4 LT |
644 | } |
645 | ||
38675170 YH |
646 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
647 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, | |
648 | const __be64 *a2, | |
649 | unsigned int len) | |
650 | { | |
512613d7 | 651 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
38675170 YH |
652 | return false; |
653 | return true; | |
654 | } | |
655 | ||
656 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, | |
657 | const struct in6_addr *addr2, | |
658 | unsigned int prefixlen) | |
659 | { | |
660 | const __be64 *a1 = (const __be64 *)addr1; | |
661 | const __be64 *a2 = (const __be64 *)addr2; | |
662 | ||
663 | if (prefixlen >= 64) { | |
664 | if (a1[0] ^ a2[0]) | |
665 | return false; | |
666 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); | |
667 | } | |
668 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); | |
669 | } | |
670 | #else | |
2ef97332 YH |
671 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
672 | const struct in6_addr *addr2, | |
673 | unsigned int prefixlen) | |
1da177e4 | 674 | { |
2ef97332 YH |
675 | const __be32 *a1 = addr1->s6_addr32; |
676 | const __be32 *a2 = addr2->s6_addr32; | |
95c96174 | 677 | unsigned int pdw, pbi; |
1da177e4 LT |
678 | |
679 | /* check complete u32 in prefix */ | |
680 | pdw = prefixlen >> 5; | |
681 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
92113bfd | 682 | return false; |
1da177e4 LT |
683 | |
684 | /* check incomplete u32 in prefix */ | |
685 | pbi = prefixlen & 0x1f; | |
686 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
92113bfd | 687 | return false; |
1da177e4 | 688 | |
92113bfd | 689 | return true; |
1da177e4 | 690 | } |
38675170 | 691 | #endif |
1da177e4 | 692 | |
92113bfd | 693 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
1da177e4 | 694 | { |
1a203cb3 ED |
695 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
696 | const unsigned long *ul = (const unsigned long *)a; | |
697 | ||
698 | return (ul[0] | ul[1]) == 0UL; | |
699 | #else | |
a02cec21 ED |
700 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
701 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1a203cb3 | 702 | #endif |
1da177e4 LT |
703 | } |
704 | ||
ddbe5032 ED |
705 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
706 | { | |
707 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
708 | const unsigned long *ul = (const unsigned long *)a; | |
709 | unsigned long x = ul[0] ^ ul[1]; | |
710 | ||
711 | return (u32)(x ^ (x >> 32)); | |
712 | #else | |
713 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ | |
714 | a->s6_addr32[2] ^ a->s6_addr32[3]); | |
715 | #endif | |
716 | } | |
717 | ||
08dcdbf6 | 718 | /* more secured version of ipv6_addr_hash() */ |
b50026b5 | 719 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
08dcdbf6 ED |
720 | { |
721 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; | |
722 | ||
723 | return jhash_3words(v, | |
724 | (__force u32)a->s6_addr32[2], | |
725 | (__force u32)a->s6_addr32[3], | |
b50026b5 | 726 | initval); |
08dcdbf6 ED |
727 | } |
728 | ||
92113bfd | 729 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
f630e43a | 730 | { |
e287656b | 731 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
1373a773 | 732 | const __be64 *be = (const __be64 *)a; |
e287656b | 733 | |
1373a773 | 734 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
e287656b | 735 | #else |
a02cec21 | 736 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
1373a773 | 737 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
e287656b | 738 | #endif |
f630e43a YH |
739 | } |
740 | ||
1373a773 JL |
741 | /* |
742 | * Note that we must __force cast these to unsigned long to make sparse happy, | |
743 | * since all of the endian-annotated types are fixed size regardless of arch. | |
744 | */ | |
92113bfd | 745 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
e773e4fa | 746 | { |
a04d40b8 YH |
747 | return ( |
748 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
1373a773 | 749 | *(unsigned long *)a | |
a04d40b8 | 750 | #else |
1373a773 | 751 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
a04d40b8 | 752 | #endif |
1373a773 JL |
753 | (__force unsigned long)(a->s6_addr32[2] ^ |
754 | cpu_to_be32(0x0000ffff))) == 0UL; | |
e773e4fa BH |
755 | } |
756 | ||
be2644aa ED |
757 | static inline bool ipv6_addr_v4mapped_loopback(const struct in6_addr *a) |
758 | { | |
759 | return ipv6_addr_v4mapped(a) && ipv4_is_loopback(a->s6_addr32[3]); | |
760 | } | |
761 | ||
f0b1e64c MKL |
762 | static inline u32 ipv6_portaddr_hash(const struct net *net, |
763 | const struct in6_addr *addr6, | |
764 | unsigned int port) | |
765 | { | |
766 | unsigned int hash, mix = net_hash_mix(net); | |
767 | ||
768 | if (ipv6_addr_any(addr6)) | |
769 | hash = jhash_1word(0, mix); | |
770 | else if (ipv6_addr_v4mapped(addr6)) | |
771 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); | |
772 | else | |
773 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); | |
774 | ||
775 | return hash ^ port; | |
776 | } | |
777 | ||
99cd07a5 JMT |
778 | /* |
779 | * Check for a RFC 4843 ORCHID address | |
780 | * (Overlay Routable Cryptographic Hash Identifiers) | |
781 | */ | |
92113bfd | 782 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
99cd07a5 | 783 | { |
a02cec21 | 784 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
785 | } |
786 | ||
5c98631c LC |
787 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
788 | { | |
789 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); | |
790 | } | |
791 | ||
f15364bd AC |
792 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
793 | struct in6_addr *v4mapped) | |
794 | { | |
795 | ipv6_addr_set(v4mapped, | |
796 | 0, 0, | |
797 | htonl(0x0000FFFF), | |
798 | addr); | |
799 | } | |
800 | ||
971f359d YH |
801 | /* |
802 | * find the first different bit between two addresses | |
803 | * length of address must be a multiple of 32bits | |
804 | */ | |
9f2e7334 | 805 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
971f359d | 806 | { |
ef296f56 | 807 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
808 | int i; |
809 | ||
810 | addrlen >>= 2; | |
811 | ||
812 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
813 | __be32 xb = a1[i] ^ a2[i]; |
814 | if (xb) | |
d57b8fb8 | 815 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
816 | } |
817 | ||
818 | /* | |
82695b30 | 819 | * we should *never* get to this point since that |
971f359d YH |
820 | * would mean the addrs are equal |
821 | * | |
822 | * However, we do get to it 8) And exacly, when | |
823 | * addresses are equal 8) | |
824 | * | |
825 | * ip route add 1111::/128 via ... | |
826 | * ip route add 1111::/64 via ... | |
827 | * and we are here. | |
828 | * | |
829 | * Ideally, this function should stop comparison | |
830 | * at prefix length. It does not, but it is still OK, | |
831 | * if returned value is greater than prefix length. | |
832 | * --ANK (980803) | |
833 | */ | |
a02cec21 | 834 | return addrlen << 5; |
971f359d YH |
835 | } |
836 | ||
9f2e7334 YH |
837 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
838 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) | |
839 | { | |
840 | const __be64 *a1 = token1, *a2 = token2; | |
841 | int i; | |
842 | ||
843 | addrlen >>= 3; | |
844 | ||
845 | for (i = 0; i < addrlen; i++) { | |
846 | __be64 xb = a1[i] ^ a2[i]; | |
847 | if (xb) | |
848 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); | |
849 | } | |
850 | ||
851 | return addrlen << 6; | |
852 | } | |
853 | #endif | |
854 | ||
855 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
856 | { | |
857 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 | |
858 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) | |
859 | return __ipv6_addr_diff64(token1, token2, addrlen); | |
860 | #endif | |
861 | return __ipv6_addr_diff32(token1, token2, addrlen); | |
862 | } | |
863 | ||
971f359d YH |
864 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
865 | { | |
866 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
867 | } | |
868 | ||
7f159867 ED |
869 | __be32 ipv6_select_ident(struct net *net, |
870 | const struct in6_addr *daddr, | |
871 | const struct in6_addr *saddr); | |
0c19f846 | 872 | __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
5188cd44 | 873 | |
5c3a0fd7 | 874 | int ip6_dst_hoplimit(struct dst_entry *dst); |
3ce9b35f | 875 | |
5c98631c LC |
876 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
877 | struct dst_entry *dst) | |
878 | { | |
879 | int hlimit; | |
880 | ||
881 | if (ipv6_addr_is_multicast(&fl6->daddr)) | |
882 | hlimit = np->mcast_hops; | |
883 | else | |
884 | hlimit = np->hop_limit; | |
885 | if (hlimit < 0) | |
886 | hlimit = ip6_dst_hoplimit(dst); | |
887 | return hlimit; | |
888 | } | |
889 | ||
c3f83241 TH |
890 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
891 | * Equivalent to : flow->v6addrs.src = iph->saddr; | |
892 | * flow->v6addrs.dst = iph->daddr; | |
893 | */ | |
894 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, | |
895 | const struct ipv6hdr *iph) | |
896 | { | |
897 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != | |
898 | offsetof(typeof(flow->addrs), v6addrs.src) + | |
899 | sizeof(flow->addrs.v6addrs.src)); | |
900 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); | |
901 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
902 | } | |
903 | ||
a37934fc | 904 | #if IS_ENABLED(CONFIG_IPV6) |
42240901 | 905 | |
db57dc7c VB |
906 | static inline bool ipv6_can_nonlocal_bind(struct net *net, |
907 | struct inet_sock *inet) | |
908 | { | |
909 | return net->ipv6.sysctl.ip_nonlocal_bind || | |
910 | inet->freebind || inet->transparent; | |
911 | } | |
912 | ||
42240901 TH |
913 | /* Sysctl settings for net ipv6.auto_flowlabels */ |
914 | #define IP6_AUTO_FLOW_LABEL_OFF 0 | |
915 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 | |
916 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 | |
917 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 | |
918 | ||
919 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED | |
920 | ||
b5677416 | 921 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
42240901 | 922 | |
cb1ce2ef | 923 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
67800f9b TH |
924 | __be32 flowlabel, bool autolabel, |
925 | struct flowi6 *fl6) | |
cb1ce2ef | 926 | { |
42240901 | 927 | u32 hash; |
cb1ce2ef | 928 | |
90427ef5 DM |
929 | /* @flowlabel may include more than a flow label, eg, the traffic class. |
930 | * Here we want only the flow label value. | |
931 | */ | |
932 | flowlabel &= IPV6_FLOWLABEL_MASK; | |
933 | ||
42240901 TH |
934 | if (flowlabel || |
935 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || | |
936 | (!autolabel && | |
937 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) | |
938 | return flowlabel; | |
cb1ce2ef | 939 | |
42240901 | 940 | hash = skb_get_hash_flowi6(skb, fl6); |
cb1ce2ef | 941 | |
42240901 TH |
942 | /* Since this is being sent on the wire obfuscate hash a bit |
943 | * to minimize possbility that any useful information to an | |
944 | * attacker is leaked. Only lower 20 bits are relevant. | |
945 | */ | |
169dc027 | 946 | hash = rol32(hash, 16); |
82a584b7 | 947 | |
42240901 TH |
948 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
949 | ||
950 | if (net->ipv6.sysctl.flowlabel_state_ranges) | |
951 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; | |
cb1ce2ef TH |
952 | |
953 | return flowlabel; | |
954 | } | |
42240901 TH |
955 | |
956 | static inline int ip6_default_np_autolabel(struct net *net) | |
957 | { | |
958 | switch (net->ipv6.sysctl.auto_flowlabels) { | |
959 | case IP6_AUTO_FLOW_LABEL_OFF: | |
960 | case IP6_AUTO_FLOW_LABEL_OPTIN: | |
961 | default: | |
962 | return 0; | |
963 | case IP6_AUTO_FLOW_LABEL_OPTOUT: | |
964 | case IP6_AUTO_FLOW_LABEL_FORCED: | |
965 | return 1; | |
966 | } | |
967 | } | |
a37934fc | 968 | #else |
a37934fc | 969 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
42240901 TH |
970 | __be32 flowlabel, bool autolabel, |
971 | struct flowi6 *fl6) | |
a37934fc FF |
972 | { |
973 | return flowlabel; | |
974 | } | |
42240901 TH |
975 | static inline int ip6_default_np_autolabel(struct net *net) |
976 | { | |
977 | return 0; | |
978 | } | |
a37934fc FF |
979 | #endif |
980 | ||
918ee507 PM |
981 | #if IS_ENABLED(CONFIG_IPV6) |
982 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
983 | { | |
984 | return net->ipv6.sysctl.multipath_hash_policy; | |
985 | } | |
ed13923f IS |
986 | static inline u32 ip6_multipath_hash_fields(const struct net *net) |
987 | { | |
988 | return net->ipv6.sysctl.multipath_hash_fields; | |
989 | } | |
918ee507 PM |
990 | #else |
991 | static inline int ip6_multipath_hash_policy(const struct net *net) | |
992 | { | |
993 | return 0; | |
994 | } | |
ed13923f IS |
995 | static inline u32 ip6_multipath_hash_fields(const struct net *net) |
996 | { | |
997 | return 0; | |
998 | } | |
918ee507 | 999 | #endif |
cb1ce2ef | 1000 | |
3e4e4c1f YH |
1001 | /* |
1002 | * Header manipulation | |
1003 | */ | |
1004 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, | |
1005 | __be32 flowlabel) | |
1006 | { | |
07f623d3 | 1007 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
3e4e4c1f YH |
1008 | } |
1009 | ||
6502ca52 YH |
1010 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
1011 | { | |
1012 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; | |
1013 | } | |
1014 | ||
3308de2b FF |
1015 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
1016 | { | |
1017 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; | |
1018 | } | |
1019 | ||
d76ed22b LR |
1020 | static inline u8 ip6_tclass(__be32 flowinfo) |
1021 | { | |
1022 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; | |
1023 | } | |
eaa93bf4 | 1024 | |
a410a0cf GN |
1025 | static inline dscp_t ip6_dscp(__be32 flowinfo) |
1026 | { | |
1027 | return inet_dsfield_to_dscp(ip6_tclass(flowinfo)); | |
1028 | } | |
1029 | ||
eaa93bf4 DB |
1030 | static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel) |
1031 | { | |
1032 | return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel; | |
1033 | } | |
1034 | ||
fa1be7e0 MK |
1035 | static inline __be32 flowi6_get_flowlabel(const struct flowi6 *fl6) |
1036 | { | |
1037 | return fl6->flowlabel & IPV6_FLOWLABEL_MASK; | |
1038 | } | |
1039 | ||
1da177e4 LT |
1040 | /* |
1041 | * Prototypes exported by ipv6 | |
1042 | */ | |
1043 | ||
1044 | /* | |
1045 | * rcv function (called from netdevice level) | |
1046 | */ | |
1047 | ||
5c3a0fd7 JP |
1048 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
1049 | struct packet_type *pt, struct net_device *orig_dev); | |
d8269e2c EC |
1050 | void ipv6_list_rcv(struct list_head *head, struct packet_type *pt, |
1051 | struct net_device *orig_dev); | |
1da177e4 | 1052 | |
0c4b51f0 | 1053 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
b05e1066 | 1054 | |
1da177e4 LT |
1055 | /* |
1056 | * upper-layer output functions | |
1057 | */ | |
1c1e9d2b | 1058 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
4f6570d7 | 1059 | __u32 mark, struct ipv6_txoptions *opt, int tclass, u32 priority); |
5c3a0fd7 JP |
1060 | |
1061 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
1062 | ||
1063 | int ip6_append_data(struct sock *sk, | |
1064 | int getfrag(void *from, char *to, int offset, int len, | |
1065 | int odd, struct sk_buff *skb), | |
f93431c8 | 1066 | void *from, size_t length, int transhdrlen, |
26879da5 | 1067 | struct ipcm6_cookie *ipc6, struct flowi6 *fl6, |
5fdaa88d | 1068 | struct rt6_info *rt, unsigned int flags); |
5c3a0fd7 JP |
1069 | |
1070 | int ip6_push_pending_frames(struct sock *sk); | |
1071 | ||
1072 | void ip6_flush_pending_frames(struct sock *sk); | |
1073 | ||
6422398c VY |
1074 | int ip6_send_skb(struct sk_buff *skb); |
1075 | ||
1076 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, | |
1077 | struct inet_cork_full *cork, | |
1078 | struct inet6_cork *v6_cork); | |
1079 | struct sk_buff *ip6_make_skb(struct sock *sk, | |
1080 | int getfrag(void *from, char *to, int offset, | |
1081 | int len, int odd, struct sk_buff *skb), | |
f93431c8 | 1082 | void *from, size_t length, int transhdrlen, |
f37a4cc6 | 1083 | struct ipcm6_cookie *ipc6, |
26879da5 | 1084 | struct rt6_info *rt, unsigned int flags, |
5fdaa88d | 1085 | struct inet_cork_full *cork); |
6422398c VY |
1086 | |
1087 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) | |
1088 | { | |
1089 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, | |
1090 | &inet6_sk(sk)->cork); | |
1091 | } | |
1092 | ||
343d60aa RP |
1093 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
1094 | struct flowi6 *fl6); | |
c4e85f73 | 1095 | struct dst_entry *ip6_dst_lookup_flow(struct net *net, const struct sock *sk, struct flowi6 *fl6, |
0e0d44ab | 1096 | const struct in6_addr *final_dst); |
5c3a0fd7 | 1097 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
96818159 AK |
1098 | const struct in6_addr *final_dst, |
1099 | bool connected); | |
571912c6 MV |
1100 | struct dst_entry *ip6_dst_lookup_tunnel(struct sk_buff *skb, |
1101 | struct net_device *dev, | |
1102 | struct net *net, struct socket *sock, | |
1103 | struct in6_addr *saddr, | |
1104 | const struct ip_tunnel_info *info, | |
1105 | u8 protocol, bool use_cache); | |
5c3a0fd7 JP |
1106 | struct dst_entry *ip6_blackhole_route(struct net *net, |
1107 | struct dst_entry *orig_dst); | |
1da177e4 LT |
1108 | |
1109 | /* | |
1110 | * skb processing functions | |
1111 | */ | |
1112 | ||
ede2059d | 1113 | int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 JP |
1114 | int ip6_forward(struct sk_buff *skb); |
1115 | int ip6_input(struct sk_buff *skb); | |
1116 | int ip6_mc_input(struct sk_buff *skb); | |
80bde363 PA |
1117 | void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr, |
1118 | bool have_final); | |
1da177e4 | 1119 | |
cf91a99d | 1120 | int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
33224b16 | 1121 | int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
ef76bc23 | 1122 | |
1da177e4 LT |
1123 | /* |
1124 | * Extension header (options) processing | |
1125 | */ | |
1126 | ||
5c3a0fd7 | 1127 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
613fa3ca DL |
1128 | u8 *proto, struct in6_addr **daddr_p, |
1129 | struct in6_addr *saddr); | |
5c3a0fd7 JP |
1130 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
1131 | u8 *proto); | |
1da177e4 | 1132 | |
5c3a0fd7 JP |
1133 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
1134 | __be16 *frag_offp); | |
1da177e4 | 1135 | |
5c3a0fd7 | 1136 | bool ipv6_ext_hdr(u8 nexthdr); |
1da177e4 | 1137 | |
f8f62675 | 1138 | enum { |
9195bb8e AA |
1139 | IP6_FH_F_FRAG = (1 << 0), |
1140 | IP6_FH_F_AUTH = (1 << 1), | |
1141 | IP6_FH_F_SKIP_RH = (1 << 2), | |
f8f62675 JG |
1142 | }; |
1143 | ||
1144 | /* find specified header and get offset to it */ | |
5c3a0fd7 JP |
1145 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
1146 | unsigned short *fragoff, int *fragflg); | |
f8f62675 | 1147 | |
0868383b | 1148 | int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type); |
c61a4043 | 1149 | |
5c3a0fd7 JP |
1150 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
1151 | const struct ipv6_txoptions *opt, | |
1152 | struct in6_addr *orig); | |
20c59de2 | 1153 | |
1da177e4 LT |
1154 | /* |
1155 | * socket options (ipv6_sockglue.c) | |
1156 | */ | |
790eb673 | 1157 | DECLARE_STATIC_KEY_FALSE(ip6_min_hopcount); |
1da177e4 | 1158 | |
75b64b68 MKL |
1159 | int do_ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, |
1160 | unsigned int optlen); | |
a7b75c5a CH |
1161 | int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, |
1162 | unsigned int optlen); | |
38566ec0 MKL |
1163 | int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1164 | sockptr_t optval, sockptr_t optlen); | |
5c3a0fd7 JP |
1165 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1166 | char __user *optval, int __user *optlen); | |
5c3a0fd7 | 1167 | |
0382a25a GN |
1168 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, |
1169 | int addr_len); | |
5c3a0fd7 | 1170 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
82b276cd HFS |
1171 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
1172 | int addr_len); | |
33c162a9 | 1173 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr); |
e646b657 | 1174 | void ip6_datagram_release_cb(struct sock *sk); |
5c3a0fd7 | 1175 | |
85fbaa75 HFS |
1176 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
1177 | int *addr_len); | |
1178 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, | |
1179 | int *addr_len); | |
5c3a0fd7 JP |
1180 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1181 | u32 info, u8 *payload); | |
1182 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); | |
1183 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1184 | ||
21985f43 | 1185 | void inet6_cleanup_sock(struct sock *sk); |
d38afeec | 1186 | void inet6_sock_destruct(struct sock *sk); |
5c3a0fd7 JP |
1187 | int inet6_release(struct socket *sock); |
1188 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
9b2c45d4 | 1189 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
5c3a0fd7 JP |
1190 | int peer); |
1191 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
3986912f CH |
1192 | int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, |
1193 | unsigned long arg); | |
5c3a0fd7 JP |
1194 | |
1195 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, | |
d8313f5c | 1196 | struct sock *sk); |
e42f1ac6 FW |
1197 | int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size); |
1198 | int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, | |
1199 | int flags); | |
d8313f5c | 1200 | |
1da177e4 LT |
1201 | /* |
1202 | * reassembly.c | |
1203 | */ | |
90ddc4f0 ED |
1204 | extern const struct proto_ops inet6_stream_ops; |
1205 | extern const struct proto_ops inet6_dgram_ops; | |
77d4b1d3 | 1206 | extern const struct proto_ops inet6_sockraw_ops; |
20380731 | 1207 | |
14c85021 ACM |
1208 | struct group_source_req; |
1209 | struct group_filter; | |
1210 | ||
5c3a0fd7 JP |
1211 | int ip6_mc_source(int add, int omode, struct sock *sk, |
1212 | struct group_source_req *pgsr); | |
d59eb177 AV |
1213 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf, |
1214 | struct sockaddr_storage *list); | |
5c3a0fd7 | 1215 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
6dadbe4b | 1216 | sockptr_t optval, size_t ss_offset); |
20380731 ACM |
1217 | |
1218 | #ifdef CONFIG_PROC_FS | |
5c3a0fd7 JP |
1219 | int ac6_proc_init(struct net *net); |
1220 | void ac6_proc_exit(struct net *net); | |
1221 | int raw6_proc_init(void); | |
1222 | void raw6_proc_exit(void); | |
1223 | int tcp6_proc_init(struct net *net); | |
1224 | void tcp6_proc_exit(struct net *net); | |
1225 | int udp6_proc_init(struct net *net); | |
1226 | void udp6_proc_exit(struct net *net); | |
1227 | int udplite6_proc_init(void); | |
1228 | void udplite6_proc_exit(void); | |
1229 | int ipv6_misc_proc_init(void); | |
1230 | void ipv6_misc_proc_exit(void); | |
1231 | int snmp6_register_dev(struct inet6_dev *idev); | |
1232 | int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 1233 | |
7f7d9a6b | 1234 | #else |
6ab57e7e DL |
1235 | static inline int ac6_proc_init(struct net *net) { return 0; } |
1236 | static inline void ac6_proc_exit(struct net *net) { } | |
1237 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
1238 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 1239 | #endif |
1da177e4 | 1240 | |
20380731 | 1241 | #ifdef CONFIG_SYSCTL |
5c3a0fd7 JP |
1242 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
1243 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
1244 | int ipv6_sysctl_register(void); | |
1245 | void ipv6_sysctl_unregister(void); | |
20380731 | 1246 | #endif |
1da177e4 | 1247 | |
46a4dee0 MC |
1248 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
1249 | const struct in6_addr *addr); | |
c7ea20c9 HL |
1250 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
1251 | const struct in6_addr *addr, unsigned int mode); | |
46a4dee0 MC |
1252 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
1253 | const struct in6_addr *addr); | |
9b115749 CH |
1254 | |
1255 | static inline int ip6_sock_set_v6only(struct sock *sk) | |
1256 | { | |
1257 | if (inet_sk(sk)->inet_num) | |
1258 | return -EINVAL; | |
1259 | lock_sock(sk); | |
1260 | sk->sk_ipv6only = true; | |
1261 | release_sock(sk); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
fce93494 CH |
1265 | static inline void ip6_sock_set_recverr(struct sock *sk) |
1266 | { | |
1267 | lock_sock(sk); | |
1268 | inet6_sk(sk)->recverr = true; | |
1269 | release_sock(sk); | |
1270 | } | |
1271 | ||
18d5ad62 CH |
1272 | static inline int __ip6_sock_set_addr_preferences(struct sock *sk, int val) |
1273 | { | |
1274 | unsigned int pref = 0; | |
1275 | unsigned int prefmask = ~0; | |
1276 | ||
1277 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
1278 | switch (val & (IPV6_PREFER_SRC_PUBLIC | | |
1279 | IPV6_PREFER_SRC_TMP | | |
1280 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
1281 | case IPV6_PREFER_SRC_PUBLIC: | |
1282 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
1283 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC | | |
1284 | IPV6_PREFER_SRC_TMP); | |
1285 | break; | |
1286 | case IPV6_PREFER_SRC_TMP: | |
1287 | pref |= IPV6_PREFER_SRC_TMP; | |
1288 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC | | |
1289 | IPV6_PREFER_SRC_TMP); | |
1290 | break; | |
1291 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
1292 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC | | |
1293 | IPV6_PREFER_SRC_TMP); | |
1294 | break; | |
1295 | case 0: | |
1296 | break; | |
1297 | default: | |
1298 | return -EINVAL; | |
1299 | } | |
1300 | ||
1301 | /* check HOME/COA conflicts */ | |
1302 | switch (val & (IPV6_PREFER_SRC_HOME | IPV6_PREFER_SRC_COA)) { | |
1303 | case IPV6_PREFER_SRC_HOME: | |
1304 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
1305 | break; | |
1306 | case IPV6_PREFER_SRC_COA: | |
1307 | pref |= IPV6_PREFER_SRC_COA; | |
1308 | break; | |
1309 | case 0: | |
1310 | break; | |
1311 | default: | |
1312 | return -EINVAL; | |
1313 | } | |
1314 | ||
1315 | /* check CGA/NONCGA conflicts */ | |
1316 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
1317 | case IPV6_PREFER_SRC_CGA: | |
1318 | case IPV6_PREFER_SRC_NONCGA: | |
1319 | case 0: | |
1320 | break; | |
1321 | default: | |
1322 | return -EINVAL; | |
1323 | } | |
1324 | ||
1325 | inet6_sk(sk)->srcprefs = (inet6_sk(sk)->srcprefs & prefmask) | pref; | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static inline int ip6_sock_set_addr_preferences(struct sock *sk, bool val) | |
1330 | { | |
1331 | int ret; | |
1332 | ||
1333 | lock_sock(sk); | |
1334 | ret = __ip6_sock_set_addr_preferences(sk, val); | |
1335 | release_sock(sk); | |
1336 | return ret; | |
1337 | } | |
1338 | ||
7d7207c2 CH |
1339 | static inline void ip6_sock_set_recvpktinfo(struct sock *sk) |
1340 | { | |
1341 | lock_sock(sk); | |
1342 | inet6_sk(sk)->rxopt.bits.rxinfo = true; | |
1343 | release_sock(sk); | |
1344 | } | |
1345 | ||
20380731 | 1346 | #endif /* _NET_IPV6_H */ |