blob: 0810aa57c78015ac35fd8ea9caaddb0c2ab791a3 [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
Denis V. Lunev725a8ff2008-07-19 00:28:58 -0700263extern int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Herbert Xue5bbef22007-10-15 12:50:28 -0700265extern int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900268extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
269 int newtype,
270 struct ipv6_opt_hdr __user *newopt,
271 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900272struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
273 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Eric Dumazet92113bf2012-05-18 08:14:11 +0200275extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800276
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +0000277static inline bool ipv6_accept_ra(struct inet6_dev *idev)
278{
279 /* If forwarding is enabled, RA are not accepted unless the special
280 * hybrid mode (accept_ra=2) is enabled.
281 */
282 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
283 idev->cnf.accept_ra;
284}
285
Amerigo Wangd4915c02012-09-18 16:50:10 +0000286#if IS_ENABLED(CONFIG_IPV6)
287static inline int ip6_frag_nqueues(struct net *net)
288{
289 return net->ipv6.frags.nqueues;
290}
291
292static inline int ip6_frag_mem(struct net *net)
293{
Jesper Dangaard Brouerd4336732013-01-28 23:45:12 +0000294 return sum_frag_mem_limit(&net->ipv6.frags);
Amerigo Wangd4915c02012-09-18 16:50:10 +0000295}
296#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
Jesper Dangaard Brouerc2a93662013-01-15 07:16:35 +0000298#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
299#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
Joe Perches9874c412010-02-16 18:40:04 +0000300#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800302extern int __ipv6_addr_type(const struct in6_addr *addr);
303static inline int ipv6_addr_type(const struct in6_addr *addr)
304{
305 return __ipv6_addr_type(addr) & 0xffff;
306}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308static inline int ipv6_addr_scope(const struct in6_addr *addr)
309{
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800310 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
311}
312
313static inline int __ipv6_addr_src_scope(int type)
314{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000315 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800316}
317
318static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
319{
320 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321}
322
Hannes Frederic Sowab7ef2132013-03-08 02:07:16 +0000323static inline bool __ipv6_addr_needs_scope_id(int type)
324{
325 return type & IPV6_ADDR_LINKLOCAL ||
326 (type & IPV6_ADDR_MULTICAST &&
327 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
328}
329
330static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
331{
332 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
333}
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
336{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700337 return memcmp(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000340static inline bool
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800341ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
342 const struct in6_addr *a2)
343{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000344#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
345 const unsigned long *ul1 = (const unsigned long *)a1;
346 const unsigned long *ulm = (const unsigned long *)m;
347 const unsigned long *ul2 = (const unsigned long *)a2;
348
349 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
350 ((ul1[1] ^ ul2[1]) & ulm[1]));
351#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000352 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
353 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
354 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
355 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000356#endif
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800357}
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359static inline void ipv6_addr_prefix(struct in6_addr *pfx,
360 const struct in6_addr *addr,
361 int plen)
362{
363 /* caller must guarantee 0 <= plen <= 128 */
364 int o = plen >> 3,
365 b = plen & 0x7;
366
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700367 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 memcpy(pfx->s6_addr, addr, o);
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700369 if (b != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000373static inline void __ipv6_addr_set_half(__be32 *addr,
374 __be32 wh, __be32 wl)
375{
376#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
377#if defined(__BIG_ENDIAN)
378 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
379 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
380 return;
381 }
382#elif defined(__LITTLE_ENDIAN)
383 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
384 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
385 return;
386 }
387#endif
388#endif
389 addr[0] = wh;
390 addr[1] = wl;
391}
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393static inline void ipv6_addr_set(struct in6_addr *addr,
Al Viro48818f82006-09-27 18:44:54 -0700394 __be32 w1, __be32 w2,
395 __be32 w3, __be32 w4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000397 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
398 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Eric Dumazet92113bf2012-05-18 08:14:11 +0200401static inline bool ipv6_addr_equal(const struct in6_addr *a1,
402 const struct in6_addr *a2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000404#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
405 const unsigned long *ul1 = (const unsigned long *)a1;
406 const unsigned long *ul2 = (const unsigned long *)a2;
407
408 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
409#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000410 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
411 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
412 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
413 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000414#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415}
416
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000417#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
418static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
419 const __be64 *a2,
420 unsigned int len)
421{
Fabio Baltieri512613d2013-01-16 22:30:17 +0100422 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000423 return false;
424 return true;
425}
426
427static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
428 const struct in6_addr *addr2,
429 unsigned int prefixlen)
430{
431 const __be64 *a1 = (const __be64 *)addr1;
432 const __be64 *a2 = (const __be64 *)addr2;
433
434 if (prefixlen >= 64) {
435 if (a1[0] ^ a2[0])
436 return false;
437 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
438 }
439 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
440}
441#else
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000442static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
443 const struct in6_addr *addr2,
444 unsigned int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000446 const __be32 *a1 = addr1->s6_addr32;
447 const __be32 *a2 = addr2->s6_addr32;
Eric Dumazet95c96172012-04-15 05:58:06 +0000448 unsigned int pdw, pbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450 /* check complete u32 in prefix */
451 pdw = prefixlen >> 5;
452 if (pdw && memcmp(a1, a2, pdw << 2))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200453 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455 /* check incomplete u32 in prefix */
456 pbi = prefixlen & 0x1f;
457 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200458 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Eric Dumazet92113bf2012-05-18 08:14:11 +0200460 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461}
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000462#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700464struct inet_frag_queue;
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700465
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100466enum ip6_defrag_users {
467 IP6_DEFRAG_LOCAL_DELIVER,
468 IP6_DEFRAG_CONNTRACK_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700469 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100470 IP6_DEFRAG_CONNTRACK_OUT,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700471 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
Patrick McHardy8fa9ff62009-12-15 16:59:59 +0100472 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700473 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100474};
475
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700476struct ip6_create_arg {
477 __be32 id;
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100478 u32 user;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000479 const struct in6_addr *src;
480 const struct in6_addr *dst;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000481 u8 ecn;
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700482};
483
484void ip6_frag_init(struct inet_frag_queue *q, void *a);
Eric Dumazetcbc264c2012-05-18 05:57:13 +0200485bool ip6_frag_match(struct inet_frag_queue *q, void *a);
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700486
Amerigo Wangb836c992012-09-18 16:50:09 +0000487/*
488 * Equivalent of ipv4 struct ip
489 */
490struct frag_queue {
491 struct inet_frag_queue q;
492
493 __be32 id; /* fragment id */
494 u32 user;
495 struct in6_addr saddr;
496 struct in6_addr daddr;
497
498 int iif;
499 unsigned int csum;
500 __u16 nhoffset;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000501 u8 ecn;
Amerigo Wangb836c992012-09-18 16:50:09 +0000502};
503
504void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
505 struct inet_frags *frags);
506
Eric Dumazet92113bf2012-05-18 08:14:11 +0200507static inline bool ipv6_addr_any(const struct in6_addr *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000509#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
510 const unsigned long *ul = (const unsigned long *)a;
511
512 return (ul[0] | ul[1]) == 0UL;
513#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000514 return (a->s6_addr32[0] | a->s6_addr32[1] |
515 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000516#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517}
518
Eric Dumazetddbe5032012-07-18 08:11:12 +0000519static inline u32 ipv6_addr_hash(const struct in6_addr *a)
520{
521#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
522 const unsigned long *ul = (const unsigned long *)a;
523 unsigned long x = ul[0] ^ ul[1];
524
525 return (u32)(x ^ (x >> 32));
526#else
527 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
528 a->s6_addr32[2] ^ a->s6_addr32[3]);
529#endif
530}
531
Eric Dumazet08dcdbf2013-02-21 12:18:52 +0000532/* more secured version of ipv6_addr_hash() */
533static inline u32 ipv6_addr_jhash(const struct in6_addr *a)
534{
535 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
536
537 return jhash_3words(v,
538 (__force u32)a->s6_addr32[2],
539 (__force u32)a->s6_addr32[3],
540 ipv6_hash_secret);
541}
542
Eric Dumazet92113bf2012-05-18 08:14:11 +0200543static inline bool ipv6_addr_loopback(const struct in6_addr *a)
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700544{
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000545#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
546 const unsigned long *ul = (const unsigned long *)a;
547
548 return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
549#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000550 return (a->s6_addr32[0] | a->s6_addr32[1] |
551 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000552#endif
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700553}
554
Eric Dumazet92113bf2012-05-18 08:14:11 +0200555static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
Brian Haleye773e4f2007-08-24 23:16:08 -0700556{
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000557 return (
558#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
559 *(__be64 *)a |
560#else
561 (a->s6_addr32[0] | a->s6_addr32[1]) |
562#endif
563 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
Brian Haleye773e4f2007-08-24 23:16:08 -0700564}
565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800567 * Check for a RFC 4843 ORCHID address
568 * (Overlay Routable Cryptographic Hash Identifiers)
569 */
Eric Dumazet92113bf2012-05-18 08:14:11 +0200570static inline bool ipv6_addr_orchid(const struct in6_addr *a)
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800571{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000572 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800573}
574
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100575static inline void ipv6_addr_set_v4mapped(const __be32 addr,
576 struct in6_addr *v4mapped)
577{
578 ipv6_addr_set(v4mapped,
579 0, 0,
580 htonl(0x0000FFFF),
581 addr);
582}
583
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800584/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800585 * find the first different bit between two addresses
586 * length of address must be a multiple of 32bits
587 */
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000588static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800589{
Al Viroef296f52006-11-14 20:56:33 -0800590 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800591 int i;
592
593 addrlen >>= 2;
594
595 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800596 __be32 xb = a1[i] ^ a2[i];
597 if (xb)
YOSHIFUJI Hideaki / 吉藤英明d57b8fb2010-03-29 06:00:05 +0000598 return i * 32 + 31 - __fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800599 }
600
601 /*
602 * we should *never* get to this point since that
603 * would mean the addrs are equal
604 *
605 * However, we do get to it 8) And exacly, when
606 * addresses are equal 8)
607 *
608 * ip route add 1111::/128 via ...
609 * ip route add 1111::/64 via ...
610 * and we are here.
611 *
612 * Ideally, this function should stop comparison
613 * at prefix length. It does not, but it is still OK,
614 * if returned value is greater than prefix length.
615 * --ANK (980803)
616 */
Eric Dumazeta02cec22010-09-22 20:43:57 +0000617 return addrlen << 5;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800618}
619
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000620#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
621static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
622{
623 const __be64 *a1 = token1, *a2 = token2;
624 int i;
625
626 addrlen >>= 3;
627
628 for (i = 0; i < addrlen; i++) {
629 __be64 xb = a1[i] ^ a2[i];
630 if (xb)
631 return i * 64 + 63 - __fls(be64_to_cpu(xb));
632 }
633
634 return addrlen << 6;
635}
636#endif
637
638static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
639{
640#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
641 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
642 return __ipv6_addr_diff64(token1, token2, addrlen);
643#endif
644 return __ipv6_addr_diff32(token1, token2, addrlen);
645}
646
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800647static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
648{
649 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
650}
651
Eric Dumazet87c48fa2011-07-21 21:25:58 -0700652extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
Sridhar Samudrala7ea2f2c2009-07-09 08:10:01 +0000653
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800654/*
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000655 * Header manipulation
656 */
657static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
658 __be32 flowlabel)
659{
YOSHIFUJI Hideaki07f623d2013-01-17 12:10:57 +0900660 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000661}
662
YOSHIFUJI Hideaki / 吉藤英明6502ca52013-01-13 05:01:51 +0000663static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
664{
665 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
666}
667
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000668/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 * Prototypes exported by ipv6
670 */
671
672/*
673 * rcv function (called from netdevice level)
674 */
675
676extern int ipv6_rcv(struct sk_buff *skb,
677 struct net_device *dev,
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700678 struct packet_type *pt,
679 struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Patrick McHardyb05e1062006-01-06 23:03:34 -0800681extern int ip6_rcv_finish(struct sk_buff *skb);
682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683/*
684 * upper-layer output functions
685 */
686extern int ip6_xmit(struct sock *sk,
687 struct sk_buff *skb,
David S. Miller4c9483b2011-03-12 16:22:43 -0500688 struct flowi6 *fl6,
Eric Dumazetb903d322011-10-27 00:44:35 -0400689 struct ipv6_txoptions *opt,
690 int tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
693
694extern int ip6_append_data(struct sock *sk,
695 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
696 void *from,
697 int length,
698 int transhdrlen,
699 int hlimit,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900700 int tclass,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 struct ipv6_txoptions *opt,
David S. Miller4c9483b2011-03-12 16:22:43 -0500702 struct flowi6 *fl6,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 struct rt6_info *rt,
Brian Haley13b52cd2010-04-23 11:26:08 +0000704 unsigned int flags,
705 int dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707extern int ip6_push_pending_frames(struct sock *sk);
708
709extern void ip6_flush_pending_frames(struct sock *sk);
710
711extern int ip6_dst_lookup(struct sock *sk,
712 struct dst_entry **dst,
David S. Miller4c9483b2011-03-12 16:22:43 -0500713 struct flowi6 *fl6);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800714extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -0500715 struct flowi6 *fl6,
David S. Miller68d0c6d2011-03-01 13:19:07 -0800716 const struct in6_addr *final_dst,
David S. Millera1414712011-03-01 14:32:04 -0800717 bool can_sleep);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800718extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -0500719 struct flowi6 *fl6,
David S. Miller68d0c6d2011-03-01 13:19:07 -0800720 const struct in6_addr *final_dst,
David S. Millera1414712011-03-01 14:32:04 -0800721 bool can_sleep);
David S. Miller2774c132011-03-01 14:59:04 -0800722extern struct dst_entry * ip6_blackhole_route(struct net *net,
723 struct dst_entry *orig_dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724
725/*
726 * skb processing functions
727 */
728
729extern int ip6_output(struct sk_buff *skb);
730extern int ip6_forward(struct sk_buff *skb);
731extern int ip6_input(struct sk_buff *skb);
732extern int ip6_mc_input(struct sk_buff *skb);
733
Herbert Xuef76bc22008-01-11 19:15:08 -0800734extern int __ip6_local_out(struct sk_buff *skb);
735extern int ip6_local_out(struct sk_buff *skb);
736
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737/*
738 * Extension header (options) processing
739 */
740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
742 struct ipv6_txoptions *opt,
743 u8 *proto,
744 struct in6_addr **daddr_p);
745extern void ipv6_push_frag_opts(struct sk_buff *skb,
746 struct ipv6_txoptions *opt,
747 u8 *proto);
748
749extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
Jesse Gross75f28112011-11-30 17:05:51 -0800750 u8 *nexthdrp, __be16 *frag_offp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Eric Dumazeta50feda2012-05-18 18:57:34 +0000752extern bool ipv6_ext_hdr(u8 nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
Jesse Grossf8f62672012-11-09 17:05:07 -0800754enum {
Ansis Atteka9195bb82012-11-09 17:11:31 -0800755 IP6_FH_F_FRAG = (1 << 0),
756 IP6_FH_F_AUTH = (1 << 1),
757 IP6_FH_F_SKIP_RH = (1 << 2),
Jesse Grossf8f62672012-11-09 17:05:07 -0800758};
759
760/* find specified header and get offset to it */
761extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
762 int target, unsigned short *fragoff, int *fragflg);
763
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700764extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
765
David S. Miller4c9483b2011-03-12 16:22:43 -0500766extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000767 const struct ipv6_txoptions *opt,
768 struct in6_addr *orig);
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770/*
771 * socket options (ipv6_sockglue.c)
772 */
773
774extern int ipv6_setsockopt(struct sock *sk, int level,
775 int optname,
776 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700777 unsigned int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778extern int ipv6_getsockopt(struct sock *sk, int level,
779 int optname,
780 char __user *optval,
781 int __user *optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800782extern int compat_ipv6_setsockopt(struct sock *sk,
783 int level,
784 int optname,
785 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700786 unsigned int optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800787extern int compat_ipv6_getsockopt(struct sock *sk,
788 int level,
789 int optname,
790 char __user *optval,
791 int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793extern int ip6_datagram_connect(struct sock *sk,
794 struct sockaddr *addr, int addr_len);
795
796extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
Brian Haley4b340ae2010-04-23 11:26:09 +0000797extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
Al Viroe69a4adc2006-11-14 20:56:00 -0800798extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 u32 info, u8 *payload);
David S. Miller4c9483b2011-03-12 16:22:43 -0500800extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
801extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803extern int inet6_release(struct socket *sock);
804extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
805 int addr_len);
806extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
807 int *uaddr_len, int peer);
808extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
809 unsigned long arg);
810
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800811extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
812 struct sock *sk);
813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814/*
815 * reassembly.c
816 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800817extern const struct proto_ops inet6_stream_ops;
818extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300819
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200820struct group_source_req;
821struct group_filter;
822
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300823extern int ip6_mc_source(int add, int omode, struct sock *sk,
824 struct group_source_req *pgsr);
825extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
826extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
827 struct group_filter __user *optval,
828 int __user *optlen);
Ilpo Järvinen93c8b902008-10-01 02:48:31 -0700829extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
830 const struct in6_addr *daddr, u32 rnd);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300831
832#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700833extern int ac6_proc_init(struct net *net);
834extern void ac6_proc_exit(struct net *net);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300835extern int raw6_proc_init(void);
836extern void raw6_proc_exit(void);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700837extern int tcp6_proc_init(struct net *net);
838extern void tcp6_proc_exit(struct net *net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700839extern int udp6_proc_init(struct net *net);
840extern void udp6_proc_exit(struct net *net);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800841extern int udplite6_proc_init(void);
842extern void udplite6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300843extern int ipv6_misc_proc_init(void);
844extern void ipv6_misc_proc_exit(void);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700845extern int snmp6_register_dev(struct inet6_dev *idev);
846extern int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300847
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700848#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700849static inline int ac6_proc_init(struct net *net) { return 0; }
850static inline void ac6_proc_exit(struct net *net) { }
851static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
852static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300853#endif
854
855#ifdef CONFIG_SYSCTL
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800856extern ctl_table ipv6_route_table_template[];
857extern ctl_table ipv6_icmp_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300858
Daniel Lezcano6de1a912008-02-05 02:57:59 -0800859extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
860extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
Daniel Lezcano291480c2008-01-10 02:47:55 -0800861extern int ipv6_sysctl_register(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300862extern void ipv6_sysctl_unregister(void);
863#endif
864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865#endif /* _NET_IPV6_H */