blob: eb198acaac1d5f42b53ac97838511563fe7e874b [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. */
Joe Stringer280c5712013-07-23 13:37:45 +090044#define NEXTHDR_SCTP 132 /* SCTP message. */
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070045#define NEXTHDR_MOBILITY 135 /* Mobility header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47#define NEXTHDR_MAX 255
48
49
50
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/*
81 * Addr scopes
82 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#define IPV6_ADDR_MC_SCOPE(a) \
84 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
85#define __IPV6_ADDR_SCOPE_INVALID -1
Linus Torvalds1da177e2005-04-16 15:20:36 -070086#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
92/*
Linus Lüssing5ced1332011-02-15 13:19:20 +000093 * Addr flags
94 */
Linus Lüssing5ced1332011-02-15 13:19:20 +000095#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)
Linus Lüssing5ced1332011-02-15 13:19:20 +0000101
102/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 * fragmentation header
104 */
105
106struct frag_hdr {
Al Viro44473a62006-11-08 00:21:46 -0800107 __u8 nexthdr;
108 __u8 reserved;
109 __be16 frag_off;
110 __be32 identification;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111};
112
113#define IP6_MF 0x0001
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115#include <net/sock.h>
116
117/* sysctls */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118extern int sysctl_mld_max_msf;
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800119
Denis V. Lunev087fe242008-10-08 10:35:11 -0700120#define _DEVINC(net, statname, modifier, idev, field) \
David L Stevens14878f72007-09-16 16:52:35 -0700121({ \
122 struct inet6_dev *_idev = (idev); \
123 if (likely(_idev != NULL)) \
124 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700125 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
David L Stevens14878f72007-09-16 16:52:35 -0700126})
127
Eric Dumazetbe281e52011-05-19 01:14:23 +0000128/* per device counters are atomic_long_t */
129#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
130({ \
131 struct inet6_dev *_idev = (idev); \
132 if (likely(_idev != NULL)) \
133 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
134 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
135})
136
Eric Dumazet2a244442011-11-13 01:24:04 +0000137/* per device and per net counters are atomic_long_t */
138#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
139({ \
140 struct inet6_dev *_idev = (idev); \
141 if (likely(_idev != NULL)) \
142 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
143 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
144})
145
Denis V. Lunev087fe242008-10-08 10:35:11 -0700146#define _DEVADD(net, statname, modifier, idev, field, val) \
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700147({ \
148 struct inet6_dev *_idev = (idev); \
149 if (likely(_idev != NULL)) \
150 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700151 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700152})
153
Neil Hormanedf391f2009-04-27 02:45:02 -0700154#define _DEVUPD(net, statname, modifier, idev, field, val) \
155({ \
156 struct inet6_dev *_idev = (idev); \
157 if (likely(_idev != NULL)) \
158 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
159 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
160})
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162/* MIBs */
David L Stevens14878f72007-09-16 16:52:35 -0700163
Denis V. Lunev087fe242008-10-08 10:35:11 -0700164#define IP6_INC_STATS(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700165 _DEVINC(net, ipv6, 64, idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700166#define IP6_INC_STATS_BH(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700167 _DEVINC(net, ipv6, 64_BH, idev, field)
Neil Hormanedf391f2009-04-27 02:45:02 -0700168#define IP6_ADD_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700169 _DEVADD(net, ipv6, 64, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700170#define IP6_ADD_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700171 _DEVADD(net, ipv6, 64_BH, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700172#define IP6_UPD_PO_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700173 _DEVUPD(net, ipv6, 64, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700174#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700175 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700176#define ICMP6_INC_STATS(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000177 _DEVINCATOMIC(net, icmpv6, , idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700178#define ICMP6_INC_STATS_BH(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000179 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700180
Denis V. Lunev087fe242008-10-08 10:35:11 -0700181#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000182 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700183#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000184 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700185#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000186 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700187
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000188struct ip6_ra_chain {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 struct ip6_ra_chain *next;
190 struct sock *sk;
191 int sel;
192 void (*destructor)(struct sock *);
193};
194
195extern struct ip6_ra_chain *ip6_ra_chain;
196extern rwlock_t ip6_ra_lock;
197
198/*
199 This structure is prepared by protocol, when parsing
200 ancillary data and passed to IPv6.
201 */
202
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000203struct ipv6_txoptions {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 /* Length of this structure */
205 int tot_len;
206
207 /* length of extension headers */
208
209 __u16 opt_flen; /* after fragment hdr */
210 __u16 opt_nflen; /* before fragment hdr */
211
212 struct ipv6_opt_hdr *hopopt;
213 struct ipv6_opt_hdr *dst0opt;
214 struct ipv6_rt_hdr *srcrt; /* Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 struct ipv6_opt_hdr *dst1opt;
216
217 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
218};
219
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000220struct ip6_flowlabel {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000221 struct ip6_flowlabel __rcu *next;
Al Viro90bcaf72006-11-08 00:25:17 -0800222 __be32 label;
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700223 atomic_t users;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 struct in6_addr dst;
225 struct ipv6_txoptions *opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 unsigned long linger;
YOSHIFUJI Hideaki / 吉藤英明d3aedd52013-01-30 09:27:47 +0000227 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 u8 share;
Eric W. Biederman4f82f452012-05-24 10:37:59 -0600229 union {
230 struct pid *pid;
231 kuid_t uid;
232 } owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 unsigned long lastuse;
234 unsigned long expires;
Benjamin Thery60e8fbc2008-03-26 16:53:08 -0700235 struct net *fl_net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236};
237
Harvey Harrisonf3a7c662009-02-14 22:58:35 -0800238#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
239#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000241struct ipv6_fl_socklist {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000242 struct ipv6_fl_socklist __rcu *next;
243 struct ip6_flowlabel *fl;
244 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245};
246
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700247struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
248struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
249 struct ip6_flowlabel *fl,
250 struct ipv6_txoptions *fopt);
251void fl6_free_socklist(struct sock *sk);
252int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
Florent Fourcot3fdfa5f2013-11-07 17:53:12 +0100253int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700254int ip6_flowlabel_init(void);
255void ip6_flowlabel_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257static inline void fl6_sock_release(struct ip6_flowlabel *fl)
258{
259 if (fl)
260 atomic_dec(&fl->users);
261}
262
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700263void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
David S. Millerb94f1c02012-07-12 00:33:37 -0700264
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000265int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
266 struct icmp6hdr *thdr, int len);
267
268struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb,
269 struct sock *sk, struct flowi6 *fl6);
270
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700271int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700273int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700275struct ipv6_txoptions *ipv6_dup_options(struct sock *sk,
276 struct ipv6_txoptions *opt);
277struct ipv6_txoptions *ipv6_renew_options(struct sock *sk,
278 struct ipv6_txoptions *opt,
279 int newtype,
280 struct ipv6_opt_hdr __user *newopt,
281 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900282struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
283 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700285bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800286
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +0000287static inline bool ipv6_accept_ra(struct inet6_dev *idev)
288{
289 /* If forwarding is enabled, RA are not accepted unless the special
290 * hybrid mode (accept_ra=2) is enabled.
291 */
292 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
293 idev->cnf.accept_ra;
294}
295
Amerigo Wangd4915c02012-09-18 16:50:10 +0000296#if IS_ENABLED(CONFIG_IPV6)
297static inline int ip6_frag_nqueues(struct net *net)
298{
299 return net->ipv6.frags.nqueues;
300}
301
302static inline int ip6_frag_mem(struct net *net)
303{
Jesper Dangaard Brouerd4336732013-01-28 23:45:12 +0000304 return sum_frag_mem_limit(&net->ipv6.frags);
Amerigo Wangd4915c02012-09-18 16:50:10 +0000305}
306#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
Jesper Dangaard Brouerc2a93662013-01-15 07:16:35 +0000308#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
309#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
Joe Perches9874c412010-02-16 18:40:04 +0000310#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700312int __ipv6_addr_type(const struct in6_addr *addr);
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800313static inline int ipv6_addr_type(const struct in6_addr *addr)
314{
315 return __ipv6_addr_type(addr) & 0xffff;
316}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
318static inline int ipv6_addr_scope(const struct in6_addr *addr)
319{
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800320 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
321}
322
323static inline int __ipv6_addr_src_scope(int type)
324{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000325 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800326}
327
328static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
329{
330 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331}
332
Hannes Frederic Sowab7ef2132013-03-08 02:07:16 +0000333static inline bool __ipv6_addr_needs_scope_id(int type)
334{
335 return type & IPV6_ADDR_LINKLOCAL ||
336 (type & IPV6_ADDR_MULTICAST &&
337 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
338}
339
340static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
341{
342 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
343}
344
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
346{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700347 return memcmp(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000350static inline bool
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800351ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
352 const struct in6_addr *a2)
353{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000354#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
355 const unsigned long *ul1 = (const unsigned long *)a1;
356 const unsigned long *ulm = (const unsigned long *)m;
357 const unsigned long *ul2 = (const unsigned long *)a2;
358
359 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
360 ((ul1[1] ^ ul2[1]) & ulm[1]));
361#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000362 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
363 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
364 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
365 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000366#endif
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800367}
368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369static inline void ipv6_addr_prefix(struct in6_addr *pfx,
370 const struct in6_addr *addr,
371 int plen)
372{
373 /* caller must guarantee 0 <= plen <= 128 */
374 int o = plen >> 3,
375 b = plen & 0x7;
376
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700377 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 memcpy(pfx->s6_addr, addr, o);
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700379 if (b != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000383static inline void __ipv6_addr_set_half(__be32 *addr,
384 __be32 wh, __be32 wl)
385{
386#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
387#if defined(__BIG_ENDIAN)
388 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
389 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
390 return;
391 }
392#elif defined(__LITTLE_ENDIAN)
393 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
394 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
395 return;
396 }
397#endif
398#endif
399 addr[0] = wh;
400 addr[1] = wl;
401}
402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403static inline void ipv6_addr_set(struct in6_addr *addr,
Al Viro48818f82006-09-27 18:44:54 -0700404 __be32 w1, __be32 w2,
405 __be32 w3, __be32 w4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406{
YOSHIFUJI Hideaki / 吉藤英明5206c572013-01-14 07:10:24 +0000407 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
408 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Eric Dumazet92113bf2012-05-18 08:14:11 +0200411static inline bool ipv6_addr_equal(const struct in6_addr *a1,
412 const struct in6_addr *a2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000414#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
415 const unsigned long *ul1 = (const unsigned long *)a1;
416 const unsigned long *ul2 = (const unsigned long *)a2;
417
418 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
419#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000420 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
421 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
422 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
423 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000424#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425}
426
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000427#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
428static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
429 const __be64 *a2,
430 unsigned int len)
431{
Fabio Baltieri512613d2013-01-16 22:30:17 +0100432 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000433 return false;
434 return true;
435}
436
437static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
438 const struct in6_addr *addr2,
439 unsigned int prefixlen)
440{
441 const __be64 *a1 = (const __be64 *)addr1;
442 const __be64 *a2 = (const __be64 *)addr2;
443
444 if (prefixlen >= 64) {
445 if (a1[0] ^ a2[0])
446 return false;
447 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
448 }
449 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
450}
451#else
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000452static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
453 const struct in6_addr *addr2,
454 unsigned int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455{
YOSHIFUJI Hideaki / 吉藤英明2ef97332013-01-14 07:10:31 +0000456 const __be32 *a1 = addr1->s6_addr32;
457 const __be32 *a2 = addr2->s6_addr32;
Eric Dumazet95c96172012-04-15 05:58:06 +0000458 unsigned int pdw, pbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460 /* check complete u32 in prefix */
461 pdw = prefixlen >> 5;
462 if (pdw && memcmp(a1, a2, pdw << 2))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200463 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
465 /* check incomplete u32 in prefix */
466 pbi = prefixlen & 0x1f;
467 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200468 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Eric Dumazet92113bf2012-05-18 08:14:11 +0200470 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471}
YOSHIFUJI Hideaki / 吉藤英明38675172013-01-14 07:10:38 +0000472#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700474struct inet_frag_queue;
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700475
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100476enum ip6_defrag_users {
477 IP6_DEFRAG_LOCAL_DELIVER,
478 IP6_DEFRAG_CONNTRACK_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700479 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100480 IP6_DEFRAG_CONNTRACK_OUT,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700481 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
Patrick McHardy8fa9ff62009-12-15 16:59:59 +0100482 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700483 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100484};
485
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700486struct ip6_create_arg {
487 __be32 id;
Patrick McHardy0b5ccb22009-12-15 16:59:18 +0100488 u32 user;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000489 const struct in6_addr *src;
490 const struct in6_addr *dst;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000491 u8 ecn;
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700492};
493
494void ip6_frag_init(struct inet_frag_queue *q, void *a);
Eric Dumazetcbc264c2012-05-18 05:57:13 +0200495bool ip6_frag_match(struct inet_frag_queue *q, void *a);
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700496
Amerigo Wangb836c992012-09-18 16:50:09 +0000497/*
498 * Equivalent of ipv4 struct ip
499 */
500struct frag_queue {
501 struct inet_frag_queue q;
502
503 __be32 id; /* fragment id */
504 u32 user;
505 struct in6_addr saddr;
506 struct in6_addr daddr;
507
508 int iif;
509 unsigned int csum;
510 __u16 nhoffset;
Hannes Frederic Sowaeec2e612013-03-22 08:24:44 +0000511 u8 ecn;
Amerigo Wangb836c992012-09-18 16:50:09 +0000512};
513
514void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
515 struct inet_frags *frags);
516
Eric Dumazet92113bf2012-05-18 08:14:11 +0200517static inline bool ipv6_addr_any(const struct in6_addr *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000519#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
520 const unsigned long *ul = (const unsigned long *)a;
521
522 return (ul[0] | ul[1]) == 0UL;
523#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000524 return (a->s6_addr32[0] | a->s6_addr32[1] |
525 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
Eric Dumazet1a203cb2012-07-10 19:05:57 +0000526#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527}
528
Eric Dumazetddbe5032012-07-18 08:11:12 +0000529static inline u32 ipv6_addr_hash(const struct in6_addr *a)
530{
531#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
532 const unsigned long *ul = (const unsigned long *)a;
533 unsigned long x = ul[0] ^ ul[1];
534
535 return (u32)(x ^ (x >> 32));
536#else
537 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
538 a->s6_addr32[2] ^ a->s6_addr32[3]);
539#endif
540}
541
Eric Dumazet08dcdbf2013-02-21 12:18:52 +0000542/* more secured version of ipv6_addr_hash() */
Hannes Frederic Sowab50026b2013-10-19 21:48:52 +0200543static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval)
Eric Dumazet08dcdbf2013-02-21 12:18:52 +0000544{
545 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
546
547 return jhash_3words(v,
548 (__force u32)a->s6_addr32[2],
549 (__force u32)a->s6_addr32[3],
Hannes Frederic Sowab50026b2013-10-19 21:48:52 +0200550 initval);
Eric Dumazet08dcdbf2013-02-21 12:18:52 +0000551}
552
Eric Dumazet92113bf2012-05-18 08:14:11 +0200553static inline bool ipv6_addr_loopback(const struct in6_addr *a)
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700554{
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000555#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
556 const unsigned long *ul = (const unsigned long *)a;
557
558 return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
559#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000560 return (a->s6_addr32[0] | a->s6_addr32[1] |
561 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000562#endif
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700563}
564
Eric Dumazet92113bf2012-05-18 08:14:11 +0200565static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
Brian Haleye773e4f2007-08-24 23:16:08 -0700566{
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000567 return (
568#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
569 *(__be64 *)a |
570#else
571 (a->s6_addr32[0] | a->s6_addr32[1]) |
572#endif
573 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
Brian Haleye773e4f2007-08-24 23:16:08 -0700574}
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800577 * Check for a RFC 4843 ORCHID address
578 * (Overlay Routable Cryptographic Hash Identifiers)
579 */
Eric Dumazet92113bf2012-05-18 08:14:11 +0200580static inline bool ipv6_addr_orchid(const struct in6_addr *a)
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800581{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000582 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800583}
584
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100585static inline void ipv6_addr_set_v4mapped(const __be32 addr,
586 struct in6_addr *v4mapped)
587{
588 ipv6_addr_set(v4mapped,
589 0, 0,
590 htonl(0x0000FFFF),
591 addr);
592}
593
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800594/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800595 * find the first different bit between two addresses
596 * length of address must be a multiple of 32bits
597 */
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000598static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800599{
Al Viroef296f52006-11-14 20:56:33 -0800600 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800601 int i;
602
603 addrlen >>= 2;
604
605 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800606 __be32 xb = a1[i] ^ a2[i];
607 if (xb)
YOSHIFUJI Hideaki / 吉藤英明d57b8fb2010-03-29 06:00:05 +0000608 return i * 32 + 31 - __fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800609 }
610
611 /*
612 * we should *never* get to this point since that
613 * would mean the addrs are equal
614 *
615 * However, we do get to it 8) And exacly, when
616 * addresses are equal 8)
617 *
618 * ip route add 1111::/128 via ...
619 * ip route add 1111::/64 via ...
620 * and we are here.
621 *
622 * Ideally, this function should stop comparison
623 * at prefix length. It does not, but it is still OK,
624 * if returned value is greater than prefix length.
625 * --ANK (980803)
626 */
Eric Dumazeta02cec22010-09-22 20:43:57 +0000627 return addrlen << 5;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800628}
629
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000630#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
631static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
632{
633 const __be64 *a1 = token1, *a2 = token2;
634 int i;
635
636 addrlen >>= 3;
637
638 for (i = 0; i < addrlen; i++) {
639 __be64 xb = a1[i] ^ a2[i];
640 if (xb)
641 return i * 64 + 63 - __fls(be64_to_cpu(xb));
642 }
643
644 return addrlen << 6;
645}
646#endif
647
648static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
649{
650#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
651 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
652 return __ipv6_addr_diff64(token1, token2, addrlen);
653#endif
654 return __ipv6_addr_diff32(token1, token2, addrlen);
655}
656
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800657static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
658{
659 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
660}
661
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700662void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
Sridhar Samudrala7ea2f2c2009-07-09 08:10:01 +0000663
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700664int ip6_dst_hoplimit(struct dst_entry *dst);
Cong Wang3ce9b352013-08-31 13:44:28 +0800665
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800666/*
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000667 * Header manipulation
668 */
669static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
670 __be32 flowlabel)
671{
YOSHIFUJI Hideaki07f623d2013-01-17 12:10:57 +0900672 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000673}
674
YOSHIFUJI Hideaki / 吉藤英明6502ca52013-01-13 05:01:51 +0000675static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
676{
677 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
678}
679
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000680/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 * Prototypes exported by ipv6
682 */
683
684/*
685 * rcv function (called from netdevice level)
686 */
687
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700688int ipv6_rcv(struct sk_buff *skb, struct net_device *dev,
689 struct packet_type *pt, struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700691int ip6_rcv_finish(struct sk_buff *skb);
Patrick McHardyb05e1062006-01-06 23:03:34 -0800692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693/*
694 * upper-layer output functions
695 */
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700696int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
697 struct ipv6_txoptions *opt, int tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700699int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700701int ip6_append_data(struct sock *sk,
702 int getfrag(void *from, char *to, int offset, int len,
703 int odd, struct sk_buff *skb),
704 void *from, int length, int transhdrlen, int hlimit,
705 int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6,
706 struct rt6_info *rt, unsigned int flags, int dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700708int ip6_push_pending_frames(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700710void ip6_flush_pending_frames(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700712int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
713struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
714 const struct in6_addr *final_dst,
715 bool can_sleep);
716struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
717 const struct in6_addr *final_dst,
718 bool can_sleep);
719struct dst_entry *ip6_blackhole_route(struct net *net,
720 struct dst_entry *orig_dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722/*
723 * skb processing functions
724 */
725
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700726int ip6_output(struct sk_buff *skb);
727int ip6_forward(struct sk_buff *skb);
728int ip6_input(struct sk_buff *skb);
729int ip6_mc_input(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700731int __ip6_local_out(struct sk_buff *skb);
732int ip6_local_out(struct sk_buff *skb);
Herbert Xuef76bc22008-01-11 19:15:08 -0800733
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734/*
735 * Extension header (options) processing
736 */
737
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700738void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
739 u8 *proto, struct in6_addr **daddr_p);
740void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
741 u8 *proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700743int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp,
744 __be16 *frag_offp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700746bool ipv6_ext_hdr(u8 nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Jesse Grossf8f62672012-11-09 17:05:07 -0800748enum {
Ansis Atteka9195bb82012-11-09 17:11:31 -0800749 IP6_FH_F_FRAG = (1 << 0),
750 IP6_FH_F_AUTH = (1 << 1),
751 IP6_FH_F_SKIP_RH = (1 << 2),
Jesse Grossf8f62672012-11-09 17:05:07 -0800752};
753
754/* find specified header and get offset to it */
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700755int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
756 unsigned short *fragoff, int *fragflg);
Jesse Grossf8f62672012-11-09 17:05:07 -0800757
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700758int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700759
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700760struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
761 const struct ipv6_txoptions *opt,
762 struct in6_addr *orig);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764/*
765 * socket options (ipv6_sockglue.c)
766 */
767
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700768int ipv6_setsockopt(struct sock *sk, int level, int optname,
769 char __user *optval, unsigned int optlen);
770int ipv6_getsockopt(struct sock *sk, int level, int optname,
771 char __user *optval, int __user *optlen);
772int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
773 char __user *optval, unsigned int optlen);
774int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
775 char __user *optval, int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700777int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100779int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
780 int *addr_len);
781int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
782 int *addr_len);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700783void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
784 u32 info, u8 *payload);
785void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
786void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700788int inet6_release(struct socket *sock);
789int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
790int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len,
791 int peer);
792int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700794int inet6_hash_connect(struct inet_timewait_death_row *death_row,
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800795 struct sock *sk);
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797/*
798 * reassembly.c
799 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800800extern const struct proto_ops inet6_stream_ops;
801extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300802
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200803struct group_source_req;
804struct group_filter;
805
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700806int ip6_mc_source(int add, int omode, struct sock *sk,
807 struct group_source_req *pgsr);
808int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
809int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
810 struct group_filter __user *optval, int __user *optlen);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300811
812#ifdef CONFIG_PROC_FS
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700813int ac6_proc_init(struct net *net);
814void ac6_proc_exit(struct net *net);
815int raw6_proc_init(void);
816void raw6_proc_exit(void);
817int tcp6_proc_init(struct net *net);
818void tcp6_proc_exit(struct net *net);
819int udp6_proc_init(struct net *net);
820void udp6_proc_exit(struct net *net);
821int udplite6_proc_init(void);
822void udplite6_proc_exit(void);
823int ipv6_misc_proc_init(void);
824void ipv6_misc_proc_exit(void);
825int snmp6_register_dev(struct inet6_dev *idev);
826int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300827
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700828#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700829static inline int ac6_proc_init(struct net *net) { return 0; }
830static inline void ac6_proc_exit(struct net *net) { }
831static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
832static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300833#endif
834
835#ifdef CONFIG_SYSCTL
Joe Perches9e8cda32013-06-13 19:37:53 -0700836extern struct ctl_table ipv6_route_table_template[];
837extern struct ctl_table ipv6_icmp_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300838
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700839struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
840struct ctl_table *ipv6_route_sysctl_init(struct net *net);
841int ipv6_sysctl_register(void);
842void ipv6_sysctl_unregister(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300843#endif
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845#endif /* _NET_IPV6_H */