blob: 5fe5649851713e7858a2d016988cbe175ea7eaa6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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>
Eric Dumazet08dcdbf2013-02-21 12:18:52 +000018#include <linux/jhash.h>
Herbert Xu20283d82007-07-30 17:05:49 -070019#include <net/if_inet6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/ndisc.h>
21#include <net/flow.h>
22#include <net/snmp.h>
23
24#define SIN6_LEN_RFC2133 24
25
26#define IPV6_MAXPLEN 65535
27
28/*
29 * NextHeader field of IPv6 header
30 */
31
32#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
33#define NEXTHDR_TCP 6 /* TCP segment. */
34#define NEXTHDR_UDP 17 /* UDP message. */
35#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
36#define NEXTHDR_ROUTING 43 /* Routing header. */
37#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
xeb@mail.ruc12b3952012-08-10 00:51:50 +000038#define NEXTHDR_GRE 47 /* GRE header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
40#define NEXTHDR_AUTH 51 /* Authentication header. */
41#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
42#define NEXTHDR_NONE 59 /* No next header */
43#define NEXTHDR_DEST 60 /* Destination options header. */
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070044#define NEXTHDR_MOBILITY 135 /* Mobility header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46#define NEXTHDR_MAX 255
47
48
49
50#define IPV6_DEFAULT_HOPLIMIT 64
51#define IPV6_DEFAULT_MCASTHOPS 1
52
53/*
54 * Addr type
55 *
56 * type - unicast | multicast
57 * scope - local | site | global
58 * v4 - compat
59 * v4mapped
60 * any
61 * loopback
62 */
63
64#define IPV6_ADDR_ANY 0x0000U
65
66#define IPV6_ADDR_UNICAST 0x0001U
67#define IPV6_ADDR_MULTICAST 0x0002U
68
69#define IPV6_ADDR_LOOPBACK 0x0010U
70#define IPV6_ADDR_LINKLOCAL 0x0020U
71#define IPV6_ADDR_SITELOCAL 0x0040U
72
73#define IPV6_ADDR_COMPATv4 0x0080U
74
75#define IPV6_ADDR_SCOPE_MASK 0x00f0U
76
77#define IPV6_ADDR_MAPPED 0x1000U
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79/*
80 * Addr scopes
81 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
84#define __IPV6_ADDR_SCOPE_INVALID -1
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
86#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
87#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
88#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
89#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
90
91/*
Linus Lüssing5ced1332011-02-15 13:19:20 +000092 * Addr flags
93 */
Linus Lüssing5ced1332011-02-15 13:19:20 +000094#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
95 ((a)->s6_addr[1] & 0x10)
96#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
97 ((a)->s6_addr[1] & 0x20)
98#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
99 ((a)->s6_addr[1] & 0x40)
Linus Lüssing5ced1332011-02-15 13:19:20 +0000100
101/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 * fragmentation header
103 */
104
105struct frag_hdr {
Al Viro44473a62006-11-08 00:21:46 -0800106 __u8 nexthdr;
107 __u8 reserved;
108 __be16 frag_off;
109 __be32 identification;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110};
111
112#define IP6_MF 0x0001
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114#include <net/sock.h>
115
116/* sysctls */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117extern int sysctl_mld_max_msf;
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800118
Denis V. Lunev087fe242008-10-08 10:35:11 -0700119#define _DEVINC(net, statname, modifier, idev, field) \
David L Stevens14878f72007-09-16 16:52:35 -0700120({ \
121 struct inet6_dev *_idev = (idev); \
122 if (likely(_idev != NULL)) \
123 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700124 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
David L Stevens14878f72007-09-16 16:52:35 -0700125})
126
Eric Dumazetbe281e52011-05-19 01:14:23 +0000127/* per device counters are atomic_long_t */
128#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
129({ \
130 struct inet6_dev *_idev = (idev); \
131 if (likely(_idev != NULL)) \
132 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
133 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
134})
135
Eric Dumazet2a244442011-11-13 01:24:04 +0000136/* per device and per net counters are atomic_long_t */
137#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
138({ \
139 struct inet6_dev *_idev = (idev); \
140 if (likely(_idev != NULL)) \
141 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
142 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
143})
144
Denis V. Lunev087fe242008-10-08 10:35:11 -0700145#define _DEVADD(net, statname, modifier, idev, field, val) \
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700146({ \
147 struct inet6_dev *_idev = (idev); \
148 if (likely(_idev != NULL)) \
149 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700150 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700151})
152
Neil Hormanedf391f2009-04-27 02:45:02 -0700153#define _DEVUPD(net, statname, modifier, idev, field, val) \
154({ \
155 struct inet6_dev *_idev = (idev); \
156 if (likely(_idev != NULL)) \
157 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
158 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
159})
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161/* MIBs */
David L Stevens14878f72007-09-16 16:52:35 -0700162
Denis V. Lunev087fe242008-10-08 10:35:11 -0700163#define IP6_INC_STATS(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700164 _DEVINC(net, ipv6, 64, idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700165#define IP6_INC_STATS_BH(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700166 _DEVINC(net, ipv6, 64_BH, idev, field)
Neil Hormanedf391f2009-04-27 02:45:02 -0700167#define IP6_ADD_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700168 _DEVADD(net, ipv6, 64, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700169#define IP6_ADD_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700170 _DEVADD(net, ipv6, 64_BH, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700171#define IP6_UPD_PO_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700172 _DEVUPD(net, ipv6, 64, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700173#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700174 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700175#define ICMP6_INC_STATS(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000176 _DEVINCATOMIC(net, icmpv6, , idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700177#define ICMP6_INC_STATS_BH(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000178 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700179
Denis V. Lunev087fe242008-10-08 10:35:11 -0700180#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000181 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700182#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000183 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700184#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000185 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700186
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000187struct ip6_ra_chain {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 struct ip6_ra_chain *next;
189 struct sock *sk;
190 int sel;
191 void (*destructor)(struct sock *);
192};
193
194extern struct ip6_ra_chain *ip6_ra_chain;
195extern rwlock_t ip6_ra_lock;
196
197/*
198 This structure is prepared by protocol, when parsing
199 ancillary data and passed to IPv6.
200 */
201
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000202struct ipv6_txoptions {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 /* Length of this structure */
204 int tot_len;
205
206 /* length of extension headers */
207
208 __u16 opt_flen; /* after fragment hdr */
209 __u16 opt_nflen; /* before fragment hdr */
210
211 struct ipv6_opt_hdr *hopopt;
212 struct ipv6_opt_hdr *dst0opt;
213 struct ipv6_rt_hdr *srcrt; /* Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 struct ipv6_opt_hdr *dst1opt;
215
216 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
217};
218
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000219struct ip6_flowlabel {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000220 struct ip6_flowlabel __rcu *next;
Al Viro90bcaf72006-11-08 00:25:17 -0800221 __be32 label;
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700222 atomic_t users;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 struct in6_addr dst;
224 struct ipv6_txoptions *opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 unsigned long linger;
YOSHIFUJI Hideaki / 吉藤英明d3aedd52013-01-30 09:27:47 +0000226 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 u8 share;
Eric W. Biederman4f82f452012-05-24 10:37:59 -0600228 union {
229 struct pid *pid;
230 kuid_t uid;
231 } owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 unsigned long lastuse;
233 unsigned long expires;
Benjamin Thery60e8fbc2008-03-26 16:53:08 -0700234 struct net *fl_net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235};
236
Harvey Harrisonf3a7c662009-02-14 22:58:35 -0800237#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
238#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000240struct ipv6_fl_socklist {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000241 struct ipv6_fl_socklist __rcu *next;
242 struct ip6_flowlabel *fl;
243 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244};
245
Al Viro90bcaf72006-11-08 00:25:17 -0800246extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
248 struct ip6_flowlabel * fl,
249 struct ipv6_txoptions * fopt);
250extern void fl6_free_socklist(struct sock *sk);
251extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800252extern int ip6_flowlabel_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253extern void ip6_flowlabel_cleanup(void);
254
255static inline void fl6_sock_release(struct ip6_flowlabel *fl)
256{
257 if (fl)
258 atomic_dec(&fl->users);
259}
260
David S. Millerb94f1c02012-07-12 00:33:37 -0700261extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
262
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000263int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
264 struct icmp6hdr *thdr, int len);
265
266struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb,
267 struct sock *sk, struct flowi6 *fl6);
268
Denis V. Lunev725a8ff2008-07-19 00:28:58 -0700269extern int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Herbert Xue5bbef22007-10-15 12:50:28 -0700271extern int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900274extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
275 int newtype,
276 struct ipv6_opt_hdr __user *newopt,
277 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900278struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
279 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Eric Dumazet92113bf2012-05-18 08:14:11 +0200281extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800282
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +0000283static inline bool ipv6_accept_ra(struct inet6_dev *idev)
284{
285 /* If forwarding is enabled, RA are not accepted unless the special
286 * hybrid mode (accept_ra=2) is enabled.
287 */
288 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
289 idev->cnf.accept_ra;
290}
291
Amerigo Wangd4915c02012-09-18 16:50:10 +0000292#if IS_ENABLED(CONFIG_IPV6)
293static inline int ip6_frag_nqueues(struct net *net)
294{
295 return net->ipv6.frags.nqueues;
296}
297
298static inline int ip6_frag_mem(struct net *net)
299{
Jesper Dangaard Brouerd4336732013-01-28 23:45:12 +0000300 return sum_frag_mem_limit(&net->ipv6.frags);
Amerigo Wangd4915c02012-09-18 16:50:10 +0000301}
302#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Jesper Dangaard Brouerc2a93662013-01-15 07:16:35 +0000304#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
305#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
Joe Perches9874c412010-02-16 18:40:04 +0000306#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800308extern int __ipv6_addr_type(const struct in6_addr *addr);
309static inline int ipv6_addr_type(const struct in6_addr *addr)
310{
311 return __ipv6_addr_type(addr) & 0xffff;
312}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314static inline int ipv6_addr_scope(const struct in6_addr *addr)
315{
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800316 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
317}
318
319static inline int __ipv6_addr_src_scope(int type)
320{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000321 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800322}
323
324static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
325{
326 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327}
328
Hannes Frederic Sowab7ef2132013-03-08 02:07:16 +0000329static inline bool __ipv6_addr_needs_scope_id(int type)
330{
331 return type & IPV6_ADDR_LINKLOCAL ||
332 (type & IPV6_ADDR_MULTICAST &&
333 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
334}
335
336static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
337{
338 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
339}
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
342{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700343 return memcmp(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000346static inline bool
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800347ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
348 const struct in6_addr *a2)
349{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000350#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
351 const unsigned long *ul1 = (const unsigned long *)a1;
352 const unsigned long *ulm = (const unsigned long *)m;
353 const unsigned long *ul2 = (const unsigned long *)a2;
354
355 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
356 ((ul1[1] ^ ul2[1]) & ulm[1]));
357#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000358 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
359 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
360 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
361 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000362#endif
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800363}
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365static inline void ipv6_addr_prefix(struct in6_addr *pfx,
366 const struct in6_addr *addr,
367 int plen)
368{
369 /* caller must guarantee 0 <= plen <= 128 */
370 int o = plen >> 3,
371 b = plen & 0x7;
372
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700373 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 memcpy(pfx->s6_addr, addr, o);
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700375 if (b != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377}
378
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000379static inline void __ipv6_addr_set_half(__be32 *addr,
380 __be32 wh, __be32 wl)
381{
382#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
383#if defined(__BIG_ENDIAN)
384 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
385 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
386 return;
387 }
388#elif defined(__LITTLE_ENDIAN)
389 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
390 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
391 return;
392 }
393#endif
394#endif
395 addr[0] = wh;
396 addr[1] = wl;
397}
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399static inline void ipv6_addr_set(struct in6_addr *addr,
Al Viro48818f82006-09-27 18:44:54 -0700400 __be32 w1, __be32 w2,
401 __be32 w3, __be32 w4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402{
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000403 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
404 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Eric Dumazet92113bf2012-05-18 08:14:11 +0200407static inline bool ipv6_addr_equal(const struct in6_addr *a1,
408 const struct in6_addr *a2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000410#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
411 const unsigned long *ul1 = (const unsigned long *)a1;
412 const unsigned long *ul2 = (const unsigned long *)a2;
413
414 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
415#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000416 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
417 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
418 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
419 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000420#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421}
422
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000423#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
424static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
425 const __be64 *a2,
426 unsigned int len)
427{
Fabio Baltieri512613d2013-01-16 22:30:17 +0100428 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000429 return false;
430 return true;
431}
432
433static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
434 const struct in6_addr *addr2,
435 unsigned int prefixlen)
436{
437 const __be64 *a1 = (const __be64 *)addr1;
438 const __be64 *a2 = (const __be64 *)addr2;
439
440 if (prefixlen >= 64) {
441 if (a1[0] ^ a2[0])
442 return false;
443 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
444 }
445 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
446}
447#else
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000448static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
449 const struct in6_addr *addr2,
450 unsigned int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000452 const __be32 *a1 = addr1->s6_addr32;
453 const __be32 *a2 = addr2->s6_addr32;
Eric Dumazet95c96172012-04-15 05:58:06 +0000454 unsigned int pdw, pbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456 /* check complete u32 in prefix */
457 pdw = prefixlen >> 5;
458 if (pdw && memcmp(a1, a2, pdw << 2))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200459 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461 /* check incomplete u32 in prefix */
462 pbi = prefixlen & 0x1f;
463 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200464 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Eric Dumazet92113bf2012-05-18 08:14:11 +0200466 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467}
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000468#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700470struct inet_frag_queue;
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700471
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100472enum ip6_defrag_users {
473 IP6_DEFRAG_LOCAL_DELIVER,
474 IP6_DEFRAG_CONNTRACK_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700475 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100476 IP6_DEFRAG_CONNTRACK_OUT,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700477 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
Patrick McHardy8fa9ff62009-12-15 16:59:59 +0100478 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700479 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100480};
481
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700482struct ip6_create_arg {
483 __be32 id;
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100484 u32 user;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000485 const struct in6_addr *src;
486 const struct in6_addr *dst;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000487 u8 ecn;
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700488};
489
490void ip6_frag_init(struct inet_frag_queue *q, void *a);
Eric Dumazetcbc264c2012-05-18 05:57:13 +0200491bool ip6_frag_match(struct inet_frag_queue *q, void *a);
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700492
Amerigo Wangb836c992012-09-18 16:50:09 +0000493/*
494 * Equivalent of ipv4 struct ip
495 */
496struct frag_queue {
497 struct inet_frag_queue q;
498
499 __be32 id; /* fragment id */
500 u32 user;
501 struct in6_addr saddr;
502 struct in6_addr daddr;
503
504 int iif;
505 unsigned int csum;
506 __u16 nhoffset;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000507 u8 ecn;
Amerigo Wangb836c992012-09-18 16:50:09 +0000508};
509
510void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
511 struct inet_frags *frags);
512
Eric Dumazet92113bf2012-05-18 08:14:11 +0200513static inline bool ipv6_addr_any(const struct in6_addr *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000515#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
516 const unsigned long *ul = (const unsigned long *)a;
517
518 return (ul[0] | ul[1]) == 0UL;
519#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000520 return (a->s6_addr32[0] | a->s6_addr32[1] |
521 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000522#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523}
524
Eric Dumazetddbe5032012-07-18 08:11:12 +0000525static inline u32 ipv6_addr_hash(const struct in6_addr *a)
526{
527#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
528 const unsigned long *ul = (const unsigned long *)a;
529 unsigned long x = ul[0] ^ ul[1];
530
531 return (u32)(x ^ (x >> 32));
532#else
533 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
534 a->s6_addr32[2] ^ a->s6_addr32[3]);
535#endif
536}
537
Eric Dumazet08dcdbf2013-02-21 12:18:52 +0000538/* more secured version of ipv6_addr_hash() */
539static inline u32 ipv6_addr_jhash(const struct in6_addr *a)
540{
541 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
542
543 return jhash_3words(v,
544 (__force u32)a->s6_addr32[2],
545 (__force u32)a->s6_addr32[3],
546 ipv6_hash_secret);
547}
548
Eric Dumazet92113bf2012-05-18 08:14:11 +0200549static inline bool ipv6_addr_loopback(const struct in6_addr *a)
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700550{
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000551#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
552 const unsigned long *ul = (const unsigned long *)a;
553
554 return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
555#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000556 return (a->s6_addr32[0] | a->s6_addr32[1] |
557 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000558#endif
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700559}
560
Eric Dumazet92113bf2012-05-18 08:14:11 +0200561static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
Brian Haleye773e4f2007-08-24 23:16:08 -0700562{
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000563 return (
564#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
565 *(__be64 *)a |
566#else
567 (a->s6_addr32[0] | a->s6_addr32[1]) |
568#endif
569 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
Brian Haleye773e4f2007-08-24 23:16:08 -0700570}
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800573 * Check for a RFC 4843 ORCHID address
574 * (Overlay Routable Cryptographic Hash Identifiers)
575 */
Eric Dumazet92113bf2012-05-18 08:14:11 +0200576static inline bool ipv6_addr_orchid(const struct in6_addr *a)
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800577{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000578 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800579}
580
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100581static inline void ipv6_addr_set_v4mapped(const __be32 addr,
582 struct in6_addr *v4mapped)
583{
584 ipv6_addr_set(v4mapped,
585 0, 0,
586 htonl(0x0000FFFF),
587 addr);
588}
589
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800590/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800591 * find the first different bit between two addresses
592 * length of address must be a multiple of 32bits
593 */
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000594static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800595{
Al Viroef296f52006-11-14 20:56:33 -0800596 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800597 int i;
598
599 addrlen >>= 2;
600
601 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800602 __be32 xb = a1[i] ^ a2[i];
603 if (xb)
YOSHIFUJI Hideaki / 吉藤英明d57b8fb2010-03-29 06:00:05 +0000604 return i * 32 + 31 - __fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800605 }
606
607 /*
608 * we should *never* get to this point since that
609 * would mean the addrs are equal
610 *
611 * However, we do get to it 8) And exacly, when
612 * addresses are equal 8)
613 *
614 * ip route add 1111::/128 via ...
615 * ip route add 1111::/64 via ...
616 * and we are here.
617 *
618 * Ideally, this function should stop comparison
619 * at prefix length. It does not, but it is still OK,
620 * if returned value is greater than prefix length.
621 * --ANK (980803)
622 */
Eric Dumazeta02cec22010-09-22 20:43:57 +0000623 return addrlen << 5;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800624}
625
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000626#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
627static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
628{
629 const __be64 *a1 = token1, *a2 = token2;
630 int i;
631
632 addrlen >>= 3;
633
634 for (i = 0; i < addrlen; i++) {
635 __be64 xb = a1[i] ^ a2[i];
636 if (xb)
637 return i * 64 + 63 - __fls(be64_to_cpu(xb));
638 }
639
640 return addrlen << 6;
641}
642#endif
643
644static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
645{
646#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
647 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
648 return __ipv6_addr_diff64(token1, token2, addrlen);
649#endif
650 return __ipv6_addr_diff32(token1, token2, addrlen);
651}
652
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800653static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
654{
655 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
656}
657
Eric Dumazet87c48fa2011-07-21 21:25:58 -0700658extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
Sridhar Samudrala7ea2f2c2009-07-09 08:10:01 +0000659
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800660/*
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000661 * Header manipulation
662 */
663static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
664 __be32 flowlabel)
665{
YOSHIFUJI Hideaki07f623d2013-01-17 12:10:57 +0900666 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000667}
668
YOSHIFUJI Hideaki / 吉藤英明6502ca52013-01-13 05:01:51 +0000669static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
670{
671 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
672}
673
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000674/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 * Prototypes exported by ipv6
676 */
677
678/*
679 * rcv function (called from netdevice level)
680 */
681
682extern int ipv6_rcv(struct sk_buff *skb,
683 struct net_device *dev,
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700684 struct packet_type *pt,
685 struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Patrick McHardyb05e1062006-01-06 23:03:34 -0800687extern int ip6_rcv_finish(struct sk_buff *skb);
688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689/*
690 * upper-layer output functions
691 */
692extern int ip6_xmit(struct sock *sk,
693 struct sk_buff *skb,
David S. Miller4c9483b2011-03-12 16:22:43 -0500694 struct flowi6 *fl6,
Eric Dumazetb903d322011-10-27 00:44:35 -0400695 struct ipv6_txoptions *opt,
696 int tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
699
700extern int ip6_append_data(struct sock *sk,
701 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
702 void *from,
703 int length,
704 int transhdrlen,
705 int hlimit,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900706 int tclass,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 struct ipv6_txoptions *opt,
David S. Miller4c9483b2011-03-12 16:22:43 -0500708 struct flowi6 *fl6,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 struct rt6_info *rt,
Brian Haley13b52cd2010-04-23 11:26:08 +0000710 unsigned int flags,
711 int dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713extern int ip6_push_pending_frames(struct sock *sk);
714
715extern void ip6_flush_pending_frames(struct sock *sk);
716
717extern int ip6_dst_lookup(struct sock *sk,
718 struct dst_entry **dst,
David S. Miller4c9483b2011-03-12 16:22:43 -0500719 struct flowi6 *fl6);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800720extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -0500721 struct flowi6 *fl6,
David S. Miller68d0c6d2011-03-01 13:19:07 -0800722 const struct in6_addr *final_dst,
David S. Millera1414712011-03-01 14:32:04 -0800723 bool can_sleep);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800724extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -0500725 struct flowi6 *fl6,
David S. Miller68d0c6d2011-03-01 13:19:07 -0800726 const struct in6_addr *final_dst,
David S. Millera1414712011-03-01 14:32:04 -0800727 bool can_sleep);
David S. Miller2774c132011-03-01 14:59:04 -0800728extern struct dst_entry * ip6_blackhole_route(struct net *net,
729 struct dst_entry *orig_dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
731/*
732 * skb processing functions
733 */
734
735extern int ip6_output(struct sk_buff *skb);
736extern int ip6_forward(struct sk_buff *skb);
737extern int ip6_input(struct sk_buff *skb);
738extern int ip6_mc_input(struct sk_buff *skb);
739
Herbert Xuef76bc22008-01-11 19:15:08 -0800740extern int __ip6_local_out(struct sk_buff *skb);
741extern int ip6_local_out(struct sk_buff *skb);
742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743/*
744 * Extension header (options) processing
745 */
746
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
748 struct ipv6_txoptions *opt,
749 u8 *proto,
750 struct in6_addr **daddr_p);
751extern void ipv6_push_frag_opts(struct sk_buff *skb,
752 struct ipv6_txoptions *opt,
753 u8 *proto);
754
755extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
Jesse Gross75f28112011-11-30 17:05:51 -0800756 u8 *nexthdrp, __be16 *frag_offp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Eric Dumazeta50feda2012-05-18 18:57:34 +0000758extern bool ipv6_ext_hdr(u8 nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Jesse Grossf8f62672012-11-09 17:05:07 -0800760enum {
Ansis Atteka9195bb82012-11-09 17:11:31 -0800761 IP6_FH_F_FRAG = (1 << 0),
762 IP6_FH_F_AUTH = (1 << 1),
763 IP6_FH_F_SKIP_RH = (1 << 2),
Jesse Grossf8f62672012-11-09 17:05:07 -0800764};
765
766/* find specified header and get offset to it */
767extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
768 int target, unsigned short *fragoff, int *fragflg);
769
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700770extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
771
David S. Miller4c9483b2011-03-12 16:22:43 -0500772extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000773 const struct ipv6_txoptions *opt,
774 struct in6_addr *orig);
775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776/*
777 * socket options (ipv6_sockglue.c)
778 */
779
780extern int ipv6_setsockopt(struct sock *sk, int level,
781 int optname,
782 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700783 unsigned int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784extern int ipv6_getsockopt(struct sock *sk, int level,
785 int optname,
786 char __user *optval,
787 int __user *optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800788extern int compat_ipv6_setsockopt(struct sock *sk,
789 int level,
790 int optname,
791 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700792 unsigned int optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800793extern int compat_ipv6_getsockopt(struct sock *sk,
794 int level,
795 int optname,
796 char __user *optval,
797 int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799extern int ip6_datagram_connect(struct sock *sk,
800 struct sockaddr *addr, int addr_len);
801
802extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
Brian Haley4b340ae2010-04-23 11:26:09 +0000803extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
Al Viroe69a4ad2006-11-14 20:56:00 -0800804extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 u32 info, u8 *payload);
David S. Miller4c9483b2011-03-12 16:22:43 -0500806extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
807extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809extern int inet6_release(struct socket *sock);
810extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
811 int addr_len);
812extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
813 int *uaddr_len, int peer);
814extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
815 unsigned long arg);
816
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800817extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
818 struct sock *sk);
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820/*
821 * reassembly.c
822 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800823extern const struct proto_ops inet6_stream_ops;
824extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300825
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200826struct group_source_req;
827struct group_filter;
828
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300829extern int ip6_mc_source(int add, int omode, struct sock *sk,
830 struct group_source_req *pgsr);
831extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
832extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
833 struct group_filter __user *optval,
834 int __user *optlen);
Ilpo Järvinen93c8b902008-10-01 02:48:31 -0700835extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
836 const struct in6_addr *daddr, u32 rnd);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300837
838#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700839extern int ac6_proc_init(struct net *net);
840extern void ac6_proc_exit(struct net *net);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300841extern int raw6_proc_init(void);
842extern void raw6_proc_exit(void);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700843extern int tcp6_proc_init(struct net *net);
844extern void tcp6_proc_exit(struct net *net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700845extern int udp6_proc_init(struct net *net);
846extern void udp6_proc_exit(struct net *net);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800847extern int udplite6_proc_init(void);
848extern void udplite6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300849extern int ipv6_misc_proc_init(void);
850extern void ipv6_misc_proc_exit(void);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700851extern int snmp6_register_dev(struct inet6_dev *idev);
852extern int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300853
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700854#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700855static inline int ac6_proc_init(struct net *net) { return 0; }
856static inline void ac6_proc_exit(struct net *net) { }
857static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
858static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300859#endif
860
861#ifdef CONFIG_SYSCTL
Joe Perches9e8cda32013-06-13 19:37:53 -0700862extern struct ctl_table ipv6_route_table_template[];
863extern struct ctl_table ipv6_icmp_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300864
Daniel Lezcano6de1a912008-02-05 02:57:59 -0800865extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
866extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
Daniel Lezcano291480c2008-01-10 02:47:55 -0800867extern int ipv6_sysctl_register(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300868extern void ipv6_sysctl_unregister(void);
869#endif
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871#endif /* _NET_IPV6_H */