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remove libdss from Makefile
[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / include / net / ipv6.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
1da177e4
LT		 7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#ifndef _NET_IPV6_H
14#define _NET_IPV6_H
15
16#include <linux/ipv6.h>
17#include <linux/hardirq.h>
08dcdbf6 18#include <linux/jhash.h>
0aeea21a 19#include <linux/refcount.h>
20283d84 20#include <net/if_inet6.h>
1da177e4
LT		 21#include <net/ndisc.h>
22#include <net/flow.h>
1bd758eb 23#include <net/flow_dissector.h>
1da177e4
LT		 24#include <net/snmp.h>
25
26#define SIN6_LEN_RFC2133 24
27
28#define IPV6_MAXPLEN 65535
29
30/*
31 * NextHeader field of IPv6 header
32 */
33
34#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
35#define NEXTHDR_TCP 6 /* TCP segment. */
36#define NEXTHDR_UDP 17 /* UDP message. */
37#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
38#define NEXTHDR_ROUTING 43 /* Routing header. */
39#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
c12b395a 40#define NEXTHDR_GRE 47 /* GRE header. */
1da177e4
LT		 41#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
42#define NEXTHDR_AUTH 51 /* Authentication header. */
43#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
44#define NEXTHDR_NONE 59 /* No next header */
45#define NEXTHDR_DEST 60 /* Destination options header. */
280c571e 46#define NEXTHDR_SCTP 132 /* SCTP message. */
2b741653 47#define NEXTHDR_MOBILITY 135 /* Mobility header. */
1da177e4
LT		 48
49#define NEXTHDR_MAX 255
50
1da177e4
LT		 51#define IPV6_DEFAULT_HOPLIMIT 64
52#define IPV6_DEFAULT_MCASTHOPS 1
53
54/*
55 * Addr type
56 *
57 * type - unicast | multicast
58 * scope - local | site | global
59 * v4 - compat
60 * v4mapped
61 * any
62 * loopback
63 */
64
65#define IPV6_ADDR_ANY 0x0000U
66
67#define IPV6_ADDR_UNICAST 0x0001U
68#define IPV6_ADDR_MULTICAST 0x0002U
69
70#define IPV6_ADDR_LOOPBACK 0x0010U
71#define IPV6_ADDR_LINKLOCAL 0x0020U
72#define IPV6_ADDR_SITELOCAL 0x0040U
73
74#define IPV6_ADDR_COMPATv4 0x0080U
75
76#define IPV6_ADDR_SCOPE_MASK 0x00f0U
77
78#define IPV6_ADDR_MAPPED 0x1000U
1da177e4
LT		 79
80/*
81 * Addr scopes
82 */
1da177e4
LT		 83#define IPV6_ADDR_MC_SCOPE(a) \
84 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
85#define __IPV6_ADDR_SCOPE_INVALID -1
1da177e4
LT		 86#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
87#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
88#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
89#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
90#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
91
5ced1339
LL		 92/*
93 * Addr flags
94 */
5ced1339
LL		 95#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
96 ((a)->s6_addr[1] & 0x10)
97#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
98 ((a)->s6_addr[1] & 0x20)
99#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
100 ((a)->s6_addr[1] & 0x40)
5ced1339 101
1da177e4
LT		 102/*
103 * fragmentation header
104 */
105
106struct frag_hdr {
44473a6b
AV		 107 __u8 nexthdr;
108 __u8 reserved;
109 __be16 frag_off;
110 __be32 identification;
1da177e4
LT		 111};
112
1431fb31
PD		 113#define IP6_MF 0x0001
114#define IP6_OFFSET 0xFFF8
1da177e4 115
e110861f
LC		 116#define IP6_REPLY_MARK(net, mark) \
117 ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
118
1da177e4
LT		 119#include <net/sock.h>
120
121/* sysctls */
1da177e4 122extern int sysctl_mld_max_msf;
2f711939 123extern int sysctl_mld_qrv;
3d7cc2ba 124
13415e46 125#define _DEVINC(net, statname, mod, idev, field) \
14878f75 126({ \
a11d206d
YH		 127 struct inet6_dev *_idev = (idev); \
128 if (likely(_idev != NULL)) \
13415e46
ED		 129 mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\
130 mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\
a11d206d 131})
14878f75 132
be281e55 133/* per device counters are atomic_long_t */
13415e46 134#define _DEVINCATOMIC(net, statname, mod, idev, field) \
be281e55
ED		 135({ \
136 struct inet6_dev *_idev = (idev); \
137 if (likely(_idev != NULL)) \
138 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
13415e46 139 mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\
be281e55
ED		 140})
141
2a24444f
ED		 142/* per device and per net counters are atomic_long_t */
143#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
144({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
148 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
149})
150
13415e46 151#define _DEVADD(net, statname, mod, idev, field, val) \
8e7999c4
PE		 152({ \
153 struct inet6_dev *_idev = (idev); \
154 if (likely(_idev != NULL)) \
13415e46
ED		 155 mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \
156 mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\
8e7999c4
PE		 157})
158
13415e46 159#define _DEVUPD(net, statname, mod, idev, field, val) \
edf391ff
NH		 160({ \
161 struct inet6_dev *_idev = (idev); \
162 if (likely(_idev != NULL)) \
13415e46
ED		 163 mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \
164 mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\
edf391ff
NH		 165})
166
14878f75 167/* MIBs */
14878f75 168
087fe240 169#define IP6_INC_STATS(net, idev,field) \
13415e46 170 _DEVINC(net, ipv6, , idev, field)
1d015503 171#define __IP6_INC_STATS(net, idev,field) \
13415e46 172 _DEVINC(net, ipv6, __, idev, field)
edf391ff 173#define IP6_ADD_STATS(net, idev,field,val) \
13415e46 174 _DEVADD(net, ipv6, , idev, field, val)
1d015503 175#define __IP6_ADD_STATS(net, idev,field,val) \
13415e46 176 _DEVADD(net, ipv6, __, idev, field, val)
edf391ff 177#define IP6_UPD_PO_STATS(net, idev,field,val) \
13415e46 178 _DEVUPD(net, ipv6, , idev, field, val)
c2005eb0 179#define __IP6_UPD_PO_STATS(net, idev,field,val) \
13415e46 180 _DEVUPD(net, ipv6, __, idev, field, val)
087fe240 181#define ICMP6_INC_STATS(net, idev, field) \
be281e55 182 _DEVINCATOMIC(net, icmpv6, , idev, field)
a16292a0 183#define __ICMP6_INC_STATS(net, idev, field) \
13415e46 184 _DEVINCATOMIC(net, icmpv6, __, idev, field)
087fe240
DL		 185
186#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
2a24444f 187 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
f3832ed2 188#define ICMP6MSGIN_INC_STATS(net, idev, field) \
2a24444f 189 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
14878f75 190
fd2c3ef7 191struct ip6_ra_chain {
1da177e4
LT		 192 struct ip6_ra_chain *next;
193 struct sock *sk;
194 int sel;
195 void (*destructor)(struct sock *);
196};
197
198extern struct ip6_ra_chain *ip6_ra_chain;
199extern rwlock_t ip6_ra_lock;
200
201/*
202 This structure is prepared by protocol, when parsing
203 ancillary data and passed to IPv6.
204 */
205
fd2c3ef7 206struct ipv6_txoptions {
0aeea21a 207 refcount_t refcnt;
1da177e4
LT		 208 /* Length of this structure */
209 int tot_len;
210
211 /* length of extension headers */
212
213 __u16 opt_flen; /* after fragment hdr */
214 __u16 opt_nflen; /* before fragment hdr */
215
216 struct ipv6_opt_hdr *hopopt;
217 struct ipv6_opt_hdr *dst0opt;
218 struct ipv6_rt_hdr *srcrt; /* Routing Header */
1da177e4 219 struct ipv6_opt_hdr *dst1opt;
45f6fad8 220 struct rcu_head rcu;
1da177e4
LT		 221 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
222};
223
fd2c3ef7 224struct ip6_flowlabel {
7f0e44ac 225 struct ip6_flowlabel __rcu *next;
90bcaf7b 226 __be32 label;
db3459d1 227 atomic_t users;
1da177e4
LT		 228 struct in6_addr dst;
229 struct ipv6_txoptions *opt;
1da177e4 230 unsigned long linger;
d3aedd5e 231 struct rcu_head rcu;
1da177e4 232 u8 share;
4f82f457
EB		 233 union {
234 struct pid *pid;
235 kuid_t uid;
236 } owner;
1da177e4
LT		 237 unsigned long lastuse;
238 unsigned long expires;
60e8fbc4 239 struct net *fl_net;
1da177e4
LT		 240};
241
82a584b7
TH		 242#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
243#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
244#define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000)
245
37cfee90 246#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
d76ed22b 247#define IPV6_TCLASS_SHIFT 20
1da177e4 248
fd2c3ef7 249struct ipv6_fl_socklist {
7f0e44ac
ED		 250 struct ipv6_fl_socklist __rcu *next;
251 struct ip6_flowlabel *fl;
252 struct rcu_head rcu;
1da177e4
LT		 253};
254
26879da5
WW		 255struct ipcm6_cookie {
256 __s16 hlimit;
257 __s16 tclass;
258 __s8 dontfrag;
259 struct ipv6_txoptions *opt;
260};
261
45f6fad8
ED		 262static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np)
263{
264 struct ipv6_txoptions *opt;
265
266 rcu_read_lock();
267 opt = rcu_dereference(np->opt);
e550785c 268 if (opt) {
0aeea21a 269 if (!refcount_inc_not_zero(&opt->refcnt))
e550785c
BP		 270 opt = NULL;
271 else
272 opt = rcu_pointer_handoff(opt);
273 }
45f6fad8
ED		 274 rcu_read_unlock();
275 return opt;
276}
277
278static inline void txopt_put(struct ipv6_txoptions *opt)
279{
0aeea21a 280 if (opt && refcount_dec_and_test(&opt->refcnt))
45f6fad8
ED		 281 kfree_rcu(opt, rcu);
282}
283
5c3a0fd7
JP		 284struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
285struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
286 struct ip6_flowlabel *fl,
287 struct ipv6_txoptions *fopt);
288void fl6_free_socklist(struct sock *sk);
289int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
46e5f401
FF		 290int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
291 int flags);
5c3a0fd7
JP		 292int ip6_flowlabel_init(void);
293void ip6_flowlabel_cleanup(void);
2295b3dd 294bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np);
1da177e4
LT		 295
296static inline void fl6_sock_release(struct ip6_flowlabel *fl)
297{
298 if (fl)
299 atomic_dec(&fl->users);
300}
301
5c3a0fd7 302void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
b94f1c09 303
6d0bfe22
LC		 304int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
305 struct icmp6hdr *thdr, int len);
306
5c3a0fd7 307int ip6_ra_control(struct sock *sk, int sel);
1da177e4 308
5c3a0fd7 309int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4 310
5c3a0fd7
JP		 311struct ipv6_txoptions *ipv6_dup_options(struct sock *sk,
312 struct ipv6_txoptions *opt);
313struct ipv6_txoptions *ipv6_renew_options(struct sock *sk,
314 struct ipv6_txoptions *opt,
315 int newtype,
8e39e96f 316 struct ipv6_opt_hdr *newopt);
df9890c3
YH		 317struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
318 struct ipv6_txoptions *opt);
1da177e4 319
a224772d
ED		 320bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
321 const struct inet6_skb_parm *opt);
ceba1832
HD		 322struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
323 struct ipv6_txoptions *opt);
399c07de 324
aeaf6e9d
SL		 325static inline bool ipv6_accept_ra(struct inet6_dev *idev)
326{
327 /* If forwarding is enabled, RA are not accepted unless the special
328 * hybrid mode (accept_ra=2) is enabled.
329 */
330 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
331 idev->cnf.accept_ra;
332}
333
c2a93660
JDB		 334#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
335#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
9874c41c 336#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
1da177e4 337
5c3a0fd7 338int __ipv6_addr_type(const struct in6_addr *addr);
b1cacb68
YH		 339static inline int ipv6_addr_type(const struct in6_addr *addr)
340{
341 return __ipv6_addr_type(addr) & 0xffff;
342}
1da177e4
LT		 343
344static inline int ipv6_addr_scope(const struct in6_addr *addr)
345{
b1cacb68
YH		 346 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
347}
348
349static inline int __ipv6_addr_src_scope(int type)
350{
a02cec21 351 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
b1cacb68
YH		 352}
353
354static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
355{
356 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 357}
358
b7ef213e
HFS		 359static inline bool __ipv6_addr_needs_scope_id(int type)
360{
361 return type & IPV6_ADDR_LINKLOCAL ||
362 (type & IPV6_ADDR_MULTICAST &&
363 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
364}
365
366static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
367{
368 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
369}
370
1da177e4
LT		 371static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
372{
db3459d1 373 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 374}
375
1a203cb3 376static inline bool
f2ffd9ee
PM		 377ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
378 const struct in6_addr *a2)
379{
1a203cb3
ED		 380#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
381 const unsigned long *ul1 = (const unsigned long *)a1;
382 const unsigned long *ulm = (const unsigned long *)m;
383 const unsigned long *ul2 = (const unsigned long *)a2;
384
385 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
386 ((ul1[1] ^ ul2[1]) & ulm[1]));
387#else
a02cec21
ED		 388 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
389 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
390 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
391 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
1a203cb3 392#endif
f2ffd9ee
PM		 393}
394
1da177e4
LT		 395static inline void ipv6_addr_prefix(struct in6_addr *pfx,
396 const struct in6_addr *addr,
397 int plen)
398{
399 /* caller must guarantee 0 <= plen <= 128 */
400 int o = plen >> 3,
401 b = plen & 0x7;
402
db3459d1 403 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 404 memcpy(pfx->s6_addr, addr, o);
db3459d1 405 if (b != 0)
1da177e4 406 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 407}
408
818f1f3e
AA		 409static inline void ipv6_addr_prefix_copy(struct in6_addr *addr,
410 const struct in6_addr *pfx,
411 int plen)
412{
413 /* caller must guarantee 0 <= plen <= 128 */
414 int o = plen >> 3,
415 b = plen & 0x7;
416
417 memcpy(addr->s6_addr, pfx, o);
418 if (b != 0) {
419 addr->s6_addr[o] &= ~(0xff00 >> b);
420 addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b));
421 }
422}
423
5206c579
YH		 424static inline void __ipv6_addr_set_half(__be32 *addr,
425 __be32 wh, __be32 wl)
426{
427#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
428#if defined(__BIG_ENDIAN)
429 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
430 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
431 return;
432 }
433#elif defined(__LITTLE_ENDIAN)
434 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
435 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
436 return;
437 }
438#endif
439#endif
440 addr[0] = wh;
441 addr[1] = wl;
442}
443
1da177e4 444static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 445 __be32 w1, __be32 w2,
446 __be32 w3, __be32 w4)
1da177e4 447{
5206c579
YH		 448 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
449 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
1da177e4 450}
1da177e4 451
92113bfd
ED		 452static inline bool ipv6_addr_equal(const struct in6_addr *a1,
453 const struct in6_addr *a2)
1da177e4 454{
1a203cb3
ED		 455#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
456 const unsigned long *ul1 = (const unsigned long *)a1;
457 const unsigned long *ul2 = (const unsigned long *)a2;
458
459 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
460#else
a02cec21
ED		 461 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
462 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
463 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
464 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
1a203cb3 465#endif
1da177e4
LT		 466}
467
38675170
YH		 468#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
469static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
470 const __be64 *a2,
471 unsigned int len)
472{
512613d7 473 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
38675170
YH		 474 return false;
475 return true;
476}
477
478static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
479 const struct in6_addr *addr2,
480 unsigned int prefixlen)
481{
482 const __be64 *a1 = (const __be64 *)addr1;
483 const __be64 *a2 = (const __be64 *)addr2;
484
485 if (prefixlen >= 64) {
486 if (a1[0] ^ a2[0])
487 return false;
488 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
489 }
490 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
491}
492#else
2ef97332
YH		 493static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
494 const struct in6_addr *addr2,
495 unsigned int prefixlen)
1da177e4 496{
2ef97332
YH		 497 const __be32 *a1 = addr1->s6_addr32;
498 const __be32 *a2 = addr2->s6_addr32;
95c96174 499 unsigned int pdw, pbi;
1da177e4
LT		 500
501 /* check complete u32 in prefix */
502 pdw = prefixlen >> 5;
503 if (pdw && memcmp(a1, a2, pdw << 2))
92113bfd 504 return false;
1da177e4
LT		 505
506 /* check incomplete u32 in prefix */
507 pbi = prefixlen & 0x1f;
508 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
92113bfd 509 return false;
1da177e4 510
92113bfd 511 return true;
1da177e4 512}
38675170 513#endif
1da177e4 514
2588fe1d 515struct inet_frag_queue;
2588fe1d 516
0b5ccb2e
PM		 517enum ip6_defrag_users {
518 IP6_DEFRAG_LOCAL_DELIVER,
519 IP6_DEFRAG_CONNTRACK_IN,
4be929be 520 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
0b5ccb2e 521 IP6_DEFRAG_CONNTRACK_OUT,
4be929be 522 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 523 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 524 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
0b5ccb2e
PM		 525};
526
36c77782 527void ip6_frag_init(struct inet_frag_queue *q, const void *a);
9aee41ef 528extern const struct rhashtable_params ip6_rhash_params;
c6fda282 529
b836c99f
AW		 530/*
531 * Equivalent of ipv4 struct ip
532 */
533struct frag_queue {
534 struct inet_frag_queue q;
535
b836c99f
AW		 536 int iif;
537 unsigned int csum;
538 __u16 nhoffset;
eec2e618 539 u8 ecn;
b836c99f
AW		 540};
541
673220d6 542void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq);
b836c99f 543
92113bfd 544static inline bool ipv6_addr_any(const struct in6_addr *a)
1da177e4 545{
1a203cb3
ED		 546#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
547 const unsigned long *ul = (const unsigned long *)a;
548
549 return (ul[0] | ul[1]) == 0UL;
550#else
a02cec21
ED		 551 return (a->s6_addr32[0] | a->s6_addr32[1] |
552 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
1a203cb3 553#endif
1da177e4
LT		 554}
555
ddbe5032
ED		 556static inline u32 ipv6_addr_hash(const struct in6_addr *a)
557{
558#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
559 const unsigned long *ul = (const unsigned long *)a;
560 unsigned long x = ul[0] ^ ul[1];
561
562 return (u32)(x ^ (x >> 32));
563#else
564 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
565 a->s6_addr32[2] ^ a->s6_addr32[3]);
566#endif
567}
568
08dcdbf6 569/* more secured version of ipv6_addr_hash() */
b50026b5 570static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval)
08dcdbf6
ED		 571{
572 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
573
574 return jhash_3words(v,
575 (__force u32)a->s6_addr32[2],
576 (__force u32)a->s6_addr32[3],
b50026b5 577 initval);
08dcdbf6
ED		 578}
579
92113bfd 580static inline bool ipv6_addr_loopback(const struct in6_addr *a)
f630e43a 581{
e287656b 582#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
1373a773 583 const __be64 *be = (const __be64 *)a;
e287656b 584
1373a773 585 return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL;
e287656b 586#else
a02cec21 587 return (a->s6_addr32[0] | a->s6_addr32[1] |
1373a773 588 a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0;
e287656b 589#endif
f630e43a
YH		 590}
591
1373a773
JL		 592/*
593 * Note that we must __force cast these to unsigned long to make sparse happy,
594 * since all of the endian-annotated types are fixed size regardless of arch.
595 */
92113bfd 596static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
e773e4fa 597{
a04d40b8
YH		 598 return (
599#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
1373a773 600 *(unsigned long *)a |
a04d40b8 601#else
1373a773 602 (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
a04d40b8 603#endif
1373a773
JL		 604 (__force unsigned long)(a->s6_addr32[2] ^
605 cpu_to_be32(0x0000ffff))) == 0UL;
e773e4fa
BH		 606}
607
99cd07a5
JMT		 608/*
609 * Check for a RFC 4843 ORCHID address
610 * (Overlay Routable Cryptographic Hash Identifiers)
611 */
92113bfd 612static inline bool ipv6_addr_orchid(const struct in6_addr *a)
99cd07a5 613{
a02cec21 614 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
99cd07a5
JMT		 615}
616
5c98631c
LC		 617static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
618{
619 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
620}
621
f15364bd
AC		 622static inline void ipv6_addr_set_v4mapped(const __be32 addr,
623 struct in6_addr *v4mapped)
624{
625 ipv6_addr_set(v4mapped,
626 0, 0,
627 htonl(0x0000FFFF),
628 addr);
629}
630
971f359d
YH		 631/*
632 * find the first different bit between two addresses
633 * length of address must be a multiple of 32bits
634 */
9f2e7334 635static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
971f359d 636{
ef296f56 637 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 638 int i;
639
640 addrlen >>= 2;
641
642 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 643 __be32 xb = a1[i] ^ a2[i];
644 if (xb)
d57b8fb8 645 return i * 32 + 31 - __fls(ntohl(xb));
971f359d
YH		 646 }
647
648 /*
649 * we should *never* get to this point since that
650 * would mean the addrs are equal
651 *
652 * However, we do get to it 8) And exacly, when
653 * addresses are equal 8)
654 *
655 * ip route add 1111::/128 via ...
656 * ip route add 1111::/64 via ...
657 * and we are here.
658 *
659 * Ideally, this function should stop comparison
660 * at prefix length. It does not, but it is still OK,
661 * if returned value is greater than prefix length.
662 * --ANK (980803)
663 */
a02cec21 664 return addrlen << 5;
971f359d
YH		 665}
666
9f2e7334
YH		 667#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
668static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
669{
670 const __be64 *a1 = token1, *a2 = token2;
671 int i;
672
673 addrlen >>= 3;
674
675 for (i = 0; i < addrlen; i++) {
676 __be64 xb = a1[i] ^ a2[i];
677 if (xb)
678 return i * 64 + 63 - __fls(be64_to_cpu(xb));
679 }
680
681 return addrlen << 6;
682}
683#endif
684
685static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
686{
687#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
688 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
689 return __ipv6_addr_diff64(token1, token2, addrlen);
690#endif
691 return __ipv6_addr_diff32(token1, token2, addrlen);
692}
693
971f359d
YH		 694static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
695{
696 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
697}
698
7f159867
ED		 699__be32 ipv6_select_ident(struct net *net,
700 const struct in6_addr *daddr,
701 const struct in6_addr *saddr);
60335608 702__be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb);
5188cd44 703
5c3a0fd7 704int ip6_dst_hoplimit(struct dst_entry *dst);
3ce9b35f 705
5c98631c
LC		 706static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6,
707 struct dst_entry *dst)
708{
709 int hlimit;
710
711 if (ipv6_addr_is_multicast(&fl6->daddr))
712 hlimit = np->mcast_hops;
713 else
714 hlimit = np->hop_limit;
715 if (hlimit < 0)
716 hlimit = ip6_dst_hoplimit(dst);
717 return hlimit;
718}
719
c3f83241
TH		 720/* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store
721 * Equivalent to : flow->v6addrs.src = iph->saddr;
722 * flow->v6addrs.dst = iph->daddr;
723 */
724static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow,
725 const struct ipv6hdr *iph)
726{
727 BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) !=
728 offsetof(typeof(flow->addrs), v6addrs.src) +
729 sizeof(flow->addrs.v6addrs.src));
730 memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs));
731 flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
732}
733
a37934fc 734#if IS_ENABLED(CONFIG_IPV6)
42240901
TH		 735
736/* Sysctl settings for net ipv6.auto_flowlabels */
737#define IP6_AUTO_FLOW_LABEL_OFF 0
738#define IP6_AUTO_FLOW_LABEL_OPTOUT 1
739#define IP6_AUTO_FLOW_LABEL_OPTIN 2
740#define IP6_AUTO_FLOW_LABEL_FORCED 3
741
742#define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED
743
b5677416 744#define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT
42240901 745
cb1ce2ef 746static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
67800f9b
TH		 747 __be32 flowlabel, bool autolabel,
748 struct flowi6 *fl6)
cb1ce2ef 749{
42240901 750 u32 hash;
cb1ce2ef 751
90427ef5
DM		 752 /* @flowlabel may include more than a flow label, eg, the traffic class.
753 * Here we want only the flow label value.
754 */
755 flowlabel &= IPV6_FLOWLABEL_MASK;
756
42240901
TH		 757 if (flowlabel ||
758 net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF ||
759 (!autolabel &&
760 net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED))
761 return flowlabel;
cb1ce2ef 762
42240901 763 hash = skb_get_hash_flowi6(skb, fl6);
cb1ce2ef 764
42240901
TH		 765 /* Since this is being sent on the wire obfuscate hash a bit
766 * to minimize possbility that any useful information to an
767 * attacker is leaked. Only lower 20 bits are relevant.
768 */
a5d33d38 769 hash = rol32(hash, 16);
82a584b7 770
42240901
TH		 771 flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK;
772
773 if (net->ipv6.sysctl.flowlabel_state_ranges)
774 flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG;
cb1ce2ef
TH		 775
776 return flowlabel;
777}
42240901
TH		 778
779static inline int ip6_default_np_autolabel(struct net *net)
780{
781 switch (net->ipv6.sysctl.auto_flowlabels) {
782 case IP6_AUTO_FLOW_LABEL_OFF:
783 case IP6_AUTO_FLOW_LABEL_OPTIN:
784 default:
785 return 0;
786 case IP6_AUTO_FLOW_LABEL_OPTOUT:
787 case IP6_AUTO_FLOW_LABEL_FORCED:
788 return 1;
789 }
790}
a37934fc
FF		 791#else
792static inline void ip6_set_txhash(struct sock *sk) { }
793static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
42240901
TH		 794 __be32 flowlabel, bool autolabel,
795 struct flowi6 *fl6)
a37934fc
FF		 796{
797 return flowlabel;
798}
42240901
TH		 799static inline int ip6_default_np_autolabel(struct net *net)
800{
801 return 0;
802}
a37934fc
FF		 803#endif
804
cb1ce2ef 805
3e4e4c1f
YH		 806/*
807 * Header manipulation
808 */
809static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
810 __be32 flowlabel)
811{
07f623d3 812 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
3e4e4c1f
YH		 813}
814
6502ca52
YH		 815static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
816{
817 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
818}
819
3308de2b
FF		 820static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
821{
822 return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
823}
824
d76ed22b
LR		 825static inline u8 ip6_tclass(__be32 flowinfo)
826{
827 return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT;
828}
eaa93bf4
DB		 829
830static inline __be32 ip6_make_flowinfo(unsigned int tclass, __be32 flowlabel)
831{
832 return htonl(tclass << IPV6_TCLASS_SHIFT) | flowlabel;
833}
834
3f8f52c5
MK		 835static inline __be32 flowi6_get_flowlabel(const struct flowi6 *fl6)
836{
837 return fl6->flowlabel & IPV6_FLOWLABEL_MASK;
838}
839
1da177e4
LT		 840/*
841 * Prototypes exported by ipv6
842 */
843
844/*
845 * rcv function (called from netdevice level)
846 */
847
5c3a0fd7
JP		 848int ipv6_rcv(struct sk_buff *skb, struct net_device *dev,
849 struct packet_type *pt, struct net_device *orig_dev);
1da177e4 850
0c4b51f0 851int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
b05e1066 852
1da177e4
LT		 853/*
854 * upper-layer output functions
855 */
1c1e9d2b 856int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
92e55f41 857 __u32 mark, struct ipv6_txoptions *opt, int tclass);
5c3a0fd7
JP		 858
859int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
860
861int ip6_append_data(struct sock *sk,
862 int getfrag(void *from, char *to, int offset, int len,
863 int odd, struct sk_buff *skb),
26879da5
WW		 864 void *from, int length, int transhdrlen,
865 struct ipcm6_cookie *ipc6, struct flowi6 *fl6,
866 struct rt6_info *rt, unsigned int flags,
c14ac945 867 const struct sockcm_cookie *sockc);
5c3a0fd7
JP		 868
869int ip6_push_pending_frames(struct sock *sk);
870
871void ip6_flush_pending_frames(struct sock *sk);
872
6422398c
VY		 873int ip6_send_skb(struct sk_buff *skb);
874
875struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue,
876 struct inet_cork_full *cork,
877 struct inet6_cork *v6_cork);
878struct sk_buff *ip6_make_skb(struct sock *sk,
879 int getfrag(void *from, char *to, int offset,
880 int len, int odd, struct sk_buff *skb),
881 void *from, int length, int transhdrlen,
26879da5
WW		 882 struct ipcm6_cookie *ipc6, struct flowi6 *fl6,
883 struct rt6_info *rt, unsigned int flags,
c14ac945 884 const struct sockcm_cookie *sockc);
6422398c
VY		 885
886static inline struct sk_buff *ip6_finish_skb(struct sock *sk)
887{
888 return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork,
889 &inet6_sk(sk)->cork);
890}
891
343d60aa
RP		 892int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst,
893 struct flowi6 *fl6);
3aef934f 894struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6,
0e0d44ab 895 const struct in6_addr *final_dst);
5c3a0fd7 896struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
0e0d44ab 897 const struct in6_addr *final_dst);
5c3a0fd7
JP		 898struct dst_entry *ip6_blackhole_route(struct net *net,
899 struct dst_entry *orig_dst);
1da177e4
LT		 900
901/*
902 * skb processing functions
903 */
904
ede2059d 905int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
5c3a0fd7
JP		 906int ip6_forward(struct sk_buff *skb);
907int ip6_input(struct sk_buff *skb);
908int ip6_mc_input(struct sk_buff *skb);
1da177e4 909
cf91a99d 910int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
33224b16 911int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
ef76bc23 912
1da177e4
LT		 913/*
914 * Extension header (options) processing
915 */
916
5c3a0fd7 917void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
613fa3ca
DL		 918 u8 *proto, struct in6_addr **daddr_p,
919 struct in6_addr *saddr);
5c3a0fd7
JP		 920void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
921 u8 *proto);
1da177e4 922
5c3a0fd7
JP		 923int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp,
924 __be16 *frag_offp);
1da177e4 925
5c3a0fd7 926bool ipv6_ext_hdr(u8 nexthdr);
1da177e4 927
f8f62675 928enum {
9195bb8e
AA		 929 IP6_FH_F_FRAG = (1 << 0),
930 IP6_FH_F_AUTH = (1 << 1),
931 IP6_FH_F_SKIP_RH = (1 << 2),
f8f62675
JG		 932};
933
934/* find specified header and get offset to it */
5c3a0fd7
JP		 935int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
936 unsigned short *fragoff, int *fragflg);
f8f62675 937
0868383b 938int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type);
c61a4043 939
5c3a0fd7
JP		 940struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
941 const struct ipv6_txoptions *opt,
942 struct in6_addr *orig);
20c59de2 943
1da177e4
LT		 944/*
945 * socket options (ipv6_sockglue.c)
946 */
947
5c3a0fd7
JP		 948int ipv6_setsockopt(struct sock *sk, int level, int optname,
949 char __user *optval, unsigned int optlen);
950int ipv6_getsockopt(struct sock *sk, int level, int optname,
951 char __user *optval, int __user *optlen);
952int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
953 char __user *optval, unsigned int optlen);
954int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
955 char __user *optval, int __user *optlen);
956
0382a25a
GN		 957int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr,
958 int addr_len);
5c3a0fd7 959int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len);
82b276cd
HFS		 960int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr,
961 int addr_len);
33c162a9 962int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr);
e646b657 963void ip6_datagram_release_cb(struct sock *sk);
5c3a0fd7 964
85fbaa75
HFS		 965int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
966 int *addr_len);
967int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
968 int *addr_len);
5c3a0fd7
JP		 969void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
970 u32 info, u8 *payload);
971void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
972void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
973
974int inet6_release(struct socket *sock);
975int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
976int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len,
977 int peer);
978int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
979
980int inet6_hash_connect(struct inet_timewait_death_row *death_row,
d8313f5c
ACM		 981 struct sock *sk);
982
1da177e4
LT		 983/*
984 * reassembly.c
985 */
90ddc4f0
ED		 986extern const struct proto_ops inet6_stream_ops;
987extern const struct proto_ops inet6_dgram_ops;
77d4b1d3 988extern const struct proto_ops inet6_sockraw_ops;
20380731 989
14c85021
ACM		 990struct group_source_req;
991struct group_filter;
992
5c3a0fd7
JP		 993int ip6_mc_source(int add, int omode, struct sock *sk,
994 struct group_source_req *pgsr);
995int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
996int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
997 struct group_filter __user *optval, int __user *optlen);
20380731
ACM		 998
999#ifdef CONFIG_PROC_FS
5c3a0fd7
JP		 1000int ac6_proc_init(struct net *net);
1001void ac6_proc_exit(struct net *net);
1002int raw6_proc_init(void);
1003void raw6_proc_exit(void);
1004int tcp6_proc_init(struct net *net);
1005void tcp6_proc_exit(struct net *net);
1006int udp6_proc_init(struct net *net);
1007void udp6_proc_exit(struct net *net);
1008int udplite6_proc_init(void);
1009void udplite6_proc_exit(void);
1010int ipv6_misc_proc_init(void);
1011void ipv6_misc_proc_exit(void);
1012int snmp6_register_dev(struct inet6_dev *idev);
1013int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 1014
7f7d9a6b 1015#else
6ab57e7e
DL		 1016static inline int ac6_proc_init(struct net *net) { return 0; }
1017static inline void ac6_proc_exit(struct net *net) { }
1018static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
1019static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731 1020#endif
1da177e4 1021
20380731 1022#ifdef CONFIG_SYSCTL
9e8cda3b 1023extern struct ctl_table ipv6_route_table_template[];
1da177e4 1024
5c3a0fd7
JP		 1025struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
1026struct ctl_table *ipv6_route_sysctl_init(struct net *net);
1027int ipv6_sysctl_register(void);
1028void ipv6_sysctl_unregister(void);
20380731 1029#endif
1da177e4 1030
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MC		 1031int ipv6_sock_mc_join(struct sock *sk, int ifindex,
1032 const struct in6_addr *addr);
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MC		 1033int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
1034 const struct in6_addr *addr);
20380731 1035#endif /* _NET_IPV6_H */