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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>
Tom Herbertb73c3d02014-07-01 21:32:17 -070022#include <net/flow_keys.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <net/snmp.h>
24
25#define SIN6_LEN_RFC2133 24
26
27#define IPV6_MAXPLEN 65535
28
29/*
30 * NextHeader field of IPv6 header
31 */
32
33#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
34#define NEXTHDR_TCP 6 /* TCP segment. */
35#define NEXTHDR_UDP 17 /* UDP message. */
36#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
37#define NEXTHDR_ROUTING 43 /* Routing header. */
38#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
xeb@mail.ruc12b3952012-08-10 00:51:50 +000039#define NEXTHDR_GRE 47 /* GRE header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
41#define NEXTHDR_AUTH 51 /* Authentication header. */
42#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
43#define NEXTHDR_NONE 59 /* No next header */
44#define NEXTHDR_DEST 60 /* Destination options header. */
Joe Stringer280c5712013-07-23 13:37:45 +090045#define NEXTHDR_SCTP 132 /* SCTP message. */
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070046#define NEXTHDR_MOBILITY 135 /* Mobility header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#define NEXTHDR_MAX 255
49
50
51
52#define IPV6_DEFAULT_HOPLIMIT 64
53#define IPV6_DEFAULT_MCASTHOPS 1
54
55/*
56 * Addr type
57 *
58 * type - unicast | multicast
59 * scope - local | site | global
60 * v4 - compat
61 * v4mapped
62 * any
63 * loopback
64 */
65
66#define IPV6_ADDR_ANY 0x0000U
67
68#define IPV6_ADDR_UNICAST 0x0001U
69#define IPV6_ADDR_MULTICAST 0x0002U
70
71#define IPV6_ADDR_LOOPBACK 0x0010U
72#define IPV6_ADDR_LINKLOCAL 0x0020U
73#define IPV6_ADDR_SITELOCAL 0x0040U
74
75#define IPV6_ADDR_COMPATv4 0x0080U
76
77#define IPV6_ADDR_SCOPE_MASK 0x00f0U
78
79#define IPV6_ADDR_MAPPED 0x1000U
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81/*
82 * Addr scopes
83 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070084#define IPV6_ADDR_MC_SCOPE(a) \
85 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
86#define __IPV6_ADDR_SCOPE_INVALID -1
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
88#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
89#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
90#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
91#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
92
93/*
Linus Lüssing5ced1332011-02-15 13:19:20 +000094 * Addr flags
95 */
Linus Lüssing5ced1332011-02-15 13:19:20 +000096#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
97 ((a)->s6_addr[1] & 0x10)
98#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
99 ((a)->s6_addr[1] & 0x20)
100#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
101 ((a)->s6_addr[1] & 0x40)
Linus Lüssing5ced1332011-02-15 13:19:20 +0000102
103/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 * fragmentation header
105 */
106
107struct frag_hdr {
Al Viro44473a62006-11-08 00:21:46 -0800108 __u8 nexthdr;
109 __u8 reserved;
110 __be16 frag_off;
111 __be32 identification;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112};
113
Paul Durrant1431fb32013-12-03 17:39:29 +0000114#define IP6_MF 0x0001
115#define IP6_OFFSET 0xFFF8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
Lorenzo Colittie1108612014-05-13 10:17:33 -0700117#define IP6_REPLY_MARK(net, mark) \
118 ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120#include <net/sock.h>
121
122/* sysctls */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123extern int sysctl_mld_max_msf;
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800124
Denis V. Lunev087fe242008-10-08 10:35:11 -0700125#define _DEVINC(net, statname, modifier, idev, field) \
David L Stevens14878f72007-09-16 16:52:35 -0700126({ \
127 struct inet6_dev *_idev = (idev); \
128 if (likely(_idev != NULL)) \
129 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700130 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
David L Stevens14878f72007-09-16 16:52:35 -0700131})
132
Eric Dumazetbe281e52011-05-19 01:14:23 +0000133/* per device counters are atomic_long_t */
134#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
135({ \
136 struct inet6_dev *_idev = (idev); \
137 if (likely(_idev != NULL)) \
138 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
139 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
140})
141
Eric Dumazet2a244442011-11-13 01:24:04 +0000142/* per device and per net counters are atomic_long_t */
143#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
144({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
148 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
149})
150
Denis V. Lunev087fe242008-10-08 10:35:11 -0700151#define _DEVADD(net, statname, modifier, idev, field, val) \
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700152({ \
153 struct inet6_dev *_idev = (idev); \
154 if (likely(_idev != NULL)) \
155 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700156 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700157})
158
Neil Hormanedf391f2009-04-27 02:45:02 -0700159#define _DEVUPD(net, statname, modifier, idev, field, val) \
160({ \
161 struct inet6_dev *_idev = (idev); \
162 if (likely(_idev != NULL)) \
163 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
164 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
165})
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167/* MIBs */
David L Stevens14878f72007-09-16 16:52:35 -0700168
Denis V. Lunev087fe242008-10-08 10:35:11 -0700169#define IP6_INC_STATS(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700170 _DEVINC(net, ipv6, 64, idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700171#define IP6_INC_STATS_BH(net, idev,field) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700172 _DEVINC(net, ipv6, 64_BH, idev, field)
Neil Hormanedf391f2009-04-27 02:45:02 -0700173#define IP6_ADD_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700174 _DEVADD(net, ipv6, 64, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700175#define IP6_ADD_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700176 _DEVADD(net, ipv6, 64_BH, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700177#define IP6_UPD_PO_STATS(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700178 _DEVUPD(net, ipv6, 64, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700179#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700180 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700181#define ICMP6_INC_STATS(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000182 _DEVINCATOMIC(net, icmpv6, , idev, field)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700183#define ICMP6_INC_STATS_BH(net, idev, field) \
Eric Dumazetbe281e52011-05-19 01:14:23 +0000184 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700185
Denis V. Lunev087fe242008-10-08 10:35:11 -0700186#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000187 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700188#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000189 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700190#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
Eric Dumazet2a244442011-11-13 01:24:04 +0000191 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700192
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000193struct ip6_ra_chain {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 struct ip6_ra_chain *next;
195 struct sock *sk;
196 int sel;
197 void (*destructor)(struct sock *);
198};
199
200extern struct ip6_ra_chain *ip6_ra_chain;
201extern rwlock_t ip6_ra_lock;
202
203/*
204 This structure is prepared by protocol, when parsing
205 ancillary data and passed to IPv6.
206 */
207
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000208struct ipv6_txoptions {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 /* Length of this structure */
210 int tot_len;
211
212 /* length of extension headers */
213
214 __u16 opt_flen; /* after fragment hdr */
215 __u16 opt_nflen; /* before fragment hdr */
216
217 struct ipv6_opt_hdr *hopopt;
218 struct ipv6_opt_hdr *dst0opt;
219 struct ipv6_rt_hdr *srcrt; /* Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 struct ipv6_opt_hdr *dst1opt;
221
222 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
223};
224
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000225struct ip6_flowlabel {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000226 struct ip6_flowlabel __rcu *next;
Al Viro90bcaf72006-11-08 00:25:17 -0800227 __be32 label;
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700228 atomic_t users;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 struct in6_addr dst;
230 struct ipv6_txoptions *opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 unsigned long linger;
YOSHIFUJI Hideaki / 吉藤英明d3aedd52013-01-30 09:27:47 +0000232 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 u8 share;
Eric W. Biederman4f82f452012-05-24 10:37:59 -0600234 union {
235 struct pid *pid;
236 kuid_t uid;
237 } owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 unsigned long lastuse;
239 unsigned long expires;
Benjamin Thery60e8fbc2008-03-26 16:53:08 -0700240 struct net *fl_net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241};
242
Harvey Harrisonf3a7c662009-02-14 22:58:35 -0800243#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
244#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
Florent Fourcot37cfee92013-12-08 15:46:58 +0100245#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
Li RongQingd76ed222014-01-15 17:03:30 +0800246#define IPV6_TCLASS_SHIFT 20
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000248struct ipv6_fl_socklist {
Eric Dumazet7f0e44a2013-03-07 04:20:32 +0000249 struct ipv6_fl_socklist __rcu *next;
250 struct ip6_flowlabel *fl;
251 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252};
253
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700254struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
255struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
256 struct ip6_flowlabel *fl,
257 struct ipv6_txoptions *fopt);
258void fl6_free_socklist(struct sock *sk);
259int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
Florent Fourcot46e5f402014-01-17 17:15:04 +0100260int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
261 int flags);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700262int ip6_flowlabel_init(void);
263void ip6_flowlabel_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265static inline void fl6_sock_release(struct ip6_flowlabel *fl)
266{
267 if (fl)
268 atomic_dec(&fl->users);
269}
270
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700271void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
David S. Millerb94f1c02012-07-12 00:33:37 -0700272
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000273int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
274 struct icmp6hdr *thdr, int len);
275
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700276int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700278int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700280struct ipv6_txoptions *ipv6_dup_options(struct sock *sk,
281 struct ipv6_txoptions *opt);
282struct ipv6_txoptions *ipv6_renew_options(struct sock *sk,
283 struct ipv6_txoptions *opt,
284 int newtype,
285 struct ipv6_opt_hdr __user *newopt,
286 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900287struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
288 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700290bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800291
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +0000292static inline bool ipv6_accept_ra(struct inet6_dev *idev)
293{
294 /* If forwarding is enabled, RA are not accepted unless the special
295 * hybrid mode (accept_ra=2) is enabled.
296 */
297 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
298 idev->cnf.accept_ra;
299}
300
Amerigo Wangd4915c02012-09-18 16:50:10 +0000301#if IS_ENABLED(CONFIG_IPV6)
Amerigo Wangd4915c02012-09-18 16:50:10 +0000302static 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
Florian Westphal36c77782014-07-24 16:50:29 +0200494void ip6_frag_init(struct inet_frag_queue *q, const void *a);
495bool ip6_frag_match(const struct inet_frag_queue *q, const 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
Jeff Layton1373a772014-07-16 06:55:46 -0400556 const __be64 *be = (const __be64 *)a;
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000557
Jeff Layton1373a772014-07-16 06:55:46 -0400558 return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL;
YOSHIFUJI Hideaki / 吉藤英明e2876562013-01-14 07:10:06 +0000559#else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000560 return (a->s6_addr32[0] | a->s6_addr32[1] |
Jeff Layton1373a772014-07-16 06:55:46 -0400561 a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(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
Jeff Layton1373a772014-07-16 06:55:46 -0400565/*
566 * Note that we must __force cast these to unsigned long to make sparse happy,
567 * since all of the endian-annotated types are fixed size regardless of arch.
568 */
Eric Dumazet92113bf2012-05-18 08:14:11 +0200569static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
Brian Haleye773e4f2007-08-24 23:16:08 -0700570{
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000571 return (
572#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Jeff Layton1373a772014-07-16 06:55:46 -0400573 *(unsigned long *)a |
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000574#else
Jeff Layton1373a772014-07-16 06:55:46 -0400575 (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
YOSHIFUJI Hideaki / 吉藤英明a04d40b2013-01-14 07:10:14 +0000576#endif
Jeff Layton1373a772014-07-16 06:55:46 -0400577 (__force unsigned long)(a->s6_addr32[2] ^
578 cpu_to_be32(0x0000ffff))) == 0UL;
Brian Haleye773e4f2007-08-24 23:16:08 -0700579}
580
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800582 * Check for a RFC 4843 ORCHID address
583 * (Overlay Routable Cryptographic Hash Identifiers)
584 */
Eric Dumazet92113bf2012-05-18 08:14:11 +0200585static inline bool ipv6_addr_orchid(const struct in6_addr *a)
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800586{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000587 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800588}
589
Lorenzo Colitti5c986312014-04-29 11:57:34 +0900590static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
591{
592 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
593}
594
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100595static inline void ipv6_addr_set_v4mapped(const __be32 addr,
596 struct in6_addr *v4mapped)
597{
598 ipv6_addr_set(v4mapped,
599 0, 0,
600 htonl(0x0000FFFF),
601 addr);
602}
603
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800604/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800605 * find the first different bit between two addresses
606 * length of address must be a multiple of 32bits
607 */
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000608static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800609{
Al Viroef296f52006-11-14 20:56:33 -0800610 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800611 int i;
612
613 addrlen >>= 2;
614
615 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800616 __be32 xb = a1[i] ^ a2[i];
617 if (xb)
YOSHIFUJI Hideaki / 吉藤英明d57b8fb2010-03-29 06:00:05 +0000618 return i * 32 + 31 - __fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800619 }
620
621 /*
622 * we should *never* get to this point since that
623 * would mean the addrs are equal
624 *
625 * However, we do get to it 8) And exacly, when
626 * addresses are equal 8)
627 *
628 * ip route add 1111::/128 via ...
629 * ip route add 1111::/64 via ...
630 * and we are here.
631 *
632 * Ideally, this function should stop comparison
633 * at prefix length. It does not, but it is still OK,
634 * if returned value is greater than prefix length.
635 * --ANK (980803)
636 */
Eric Dumazeta02cec22010-09-22 20:43:57 +0000637 return addrlen << 5;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800638}
639
YOSHIFUJI Hideaki / 吉藤英明9f2e7332013-01-14 07:09:54 +0000640#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
641static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
642{
643 const __be64 *a1 = token1, *a2 = token2;
644 int i;
645
646 addrlen >>= 3;
647
648 for (i = 0; i < addrlen; i++) {
649 __be64 xb = a1[i] ^ a2[i];
650 if (xb)
651 return i * 64 + 63 - __fls(be64_to_cpu(xb));
652 }
653
654 return addrlen << 6;
655}
656#endif
657
658static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
659{
660#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
661 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
662 return __ipv6_addr_diff64(token1, token2, addrlen);
663#endif
664 return __ipv6_addr_diff32(token1, token2, addrlen);
665}
666
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800667static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
668{
669 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
670}
671
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700672int ip6_dst_hoplimit(struct dst_entry *dst);
Cong Wang3ce9b352013-08-31 13:44:28 +0800673
Lorenzo Colitti5c986312014-04-29 11:57:34 +0900674static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6,
675 struct dst_entry *dst)
676{
677 int hlimit;
678
679 if (ipv6_addr_is_multicast(&fl6->daddr))
680 hlimit = np->mcast_hops;
681 else
682 hlimit = np->hop_limit;
683 if (hlimit < 0)
684 hlimit = ip6_dst_hoplimit(dst);
685 return hlimit;
686}
687
Florian Fainellia37934f2014-07-08 11:15:03 -0700688#if IS_ENABLED(CONFIG_IPV6)
Tom Herbertb73c3d02014-07-01 21:32:17 -0700689static inline void ip6_set_txhash(struct sock *sk)
690{
691 struct inet_sock *inet = inet_sk(sk);
692 struct ipv6_pinfo *np = inet6_sk(sk);
693 struct flow_keys keys;
694
695 keys.src = (__force __be32)ipv6_addr_hash(&np->saddr);
696 keys.dst = (__force __be32)ipv6_addr_hash(&sk->sk_v6_daddr);
697 keys.port16[0] = inet->inet_sport;
698 keys.port16[1] = inet->inet_dport;
699
700 sk->sk_txhash = flow_hash_from_keys(&keys);
701}
702
Tom Herbertcb1ce2e2014-07-01 21:33:10 -0700703static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
704 __be32 flowlabel, bool autolabel)
705{
706 if (!flowlabel && (autolabel || net->ipv6.sysctl.auto_flowlabels)) {
707 __be32 hash;
708
709 hash = skb_get_hash(skb);
710
711 /* Since this is being sent on the wire obfuscate hash a bit
712 * to minimize possbility that any useful information to an
713 * attacker is leaked. Only lower 20 bits are relevant.
714 */
715 hash ^= hash >> 12;
716
717 flowlabel = hash & IPV6_FLOWLABEL_MASK;
718 }
719
720 return flowlabel;
721}
Florian Fainellia37934f2014-07-08 11:15:03 -0700722#else
723static inline void ip6_set_txhash(struct sock *sk) { }
724static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
725 __be32 flowlabel, bool autolabel)
726{
727 return flowlabel;
728}
729#endif
730
Tom Herbertcb1ce2e2014-07-01 21:33:10 -0700731
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800732/*
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000733 * Header manipulation
734 */
735static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
736 __be32 flowlabel)
737{
YOSHIFUJI Hideaki07f623d2013-01-17 12:10:57 +0900738 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000739}
740
YOSHIFUJI Hideaki / 吉藤英明6502ca52013-01-13 05:01:51 +0000741static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
742{
743 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
744}
745
Florent Fourcot3308de22013-12-08 15:47:00 +0100746static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
747{
748 return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
749}
750
Li RongQingd76ed222014-01-15 17:03:30 +0800751static inline u8 ip6_tclass(__be32 flowinfo)
752{
753 return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT;
754}
YOSHIFUJI Hideaki / 吉藤英明3e4e4c12013-01-13 05:01:39 +0000755/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 * Prototypes exported by ipv6
757 */
758
759/*
760 * rcv function (called from netdevice level)
761 */
762
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700763int ipv6_rcv(struct sk_buff *skb, struct net_device *dev,
764 struct packet_type *pt, struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700766int ip6_rcv_finish(struct sk_buff *skb);
Patrick McHardyb05e1062006-01-06 23:03:34 -0800767
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768/*
769 * upper-layer output functions
770 */
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700771int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
772 struct ipv6_txoptions *opt, int tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700774int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700776int ip6_append_data(struct sock *sk,
777 int getfrag(void *from, char *to, int offset, int len,
778 int odd, struct sk_buff *skb),
779 void *from, int length, int transhdrlen, int hlimit,
780 int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6,
781 struct rt6_info *rt, unsigned int flags, int dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700783int ip6_push_pending_frames(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700785void ip6_flush_pending_frames(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700787int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
788struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200789 const struct in6_addr *final_dst);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700790struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200791 const struct in6_addr *final_dst);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700792struct dst_entry *ip6_blackhole_route(struct net *net,
793 struct dst_entry *orig_dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795/*
796 * skb processing functions
797 */
798
Eric Dumazetaad88722014-04-15 13:47:15 -0400799int ip6_output(struct sock *sk, struct sk_buff *skb);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700800int ip6_forward(struct sk_buff *skb);
801int ip6_input(struct sk_buff *skb);
802int ip6_mc_input(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700804int __ip6_local_out(struct sk_buff *skb);
805int ip6_local_out(struct sk_buff *skb);
Herbert Xuef76bc22008-01-11 19:15:08 -0800806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807/*
808 * Extension header (options) processing
809 */
810
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700811void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
812 u8 *proto, struct in6_addr **daddr_p);
813void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
814 u8 *proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700816int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp,
817 __be16 *frag_offp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700819bool ipv6_ext_hdr(u8 nexthdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Jesse Grossf8f62672012-11-09 17:05:07 -0800821enum {
Ansis Atteka9195bb82012-11-09 17:11:31 -0800822 IP6_FH_F_FRAG = (1 << 0),
823 IP6_FH_F_AUTH = (1 << 1),
824 IP6_FH_F_SKIP_RH = (1 << 2),
Jesse Grossf8f62672012-11-09 17:05:07 -0800825};
826
827/* find specified header and get offset to it */
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700828int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
829 unsigned short *fragoff, int *fragflg);
Jesse Grossf8f62672012-11-09 17:05:07 -0800830
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700831int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700832
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700833struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
834 const struct ipv6_txoptions *opt,
835 struct in6_addr *orig);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837/*
838 * socket options (ipv6_sockglue.c)
839 */
840
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700841int ipv6_setsockopt(struct sock *sk, int level, int optname,
842 char __user *optval, unsigned int optlen);
843int ipv6_getsockopt(struct sock *sk, int level, int optname,
844 char __user *optval, int __user *optlen);
845int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
846 char __user *optval, unsigned int optlen);
847int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
848 char __user *optval, int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700850int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len);
Hannes Frederic Sowa82b276c2014-01-20 05:16:39 +0100851int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr,
852 int addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100854int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
855 int *addr_len);
856int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
857 int *addr_len);
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700858void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
859 u32 info, u8 *payload);
860void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
861void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700863int inet6_release(struct socket *sock);
864int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
865int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len,
866 int peer);
867int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700869int inet6_hash_connect(struct inet_timewait_death_row *death_row,
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800870 struct sock *sk);
871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872/*
873 * reassembly.c
874 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800875extern const struct proto_ops inet6_stream_ops;
876extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300877
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200878struct group_source_req;
879struct group_filter;
880
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700881int ip6_mc_source(int add, int omode, struct sock *sk,
882 struct group_source_req *pgsr);
883int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
884int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
885 struct group_filter __user *optval, int __user *optlen);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300886
887#ifdef CONFIG_PROC_FS
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700888int ac6_proc_init(struct net *net);
889void ac6_proc_exit(struct net *net);
890int raw6_proc_init(void);
891void raw6_proc_exit(void);
892int tcp6_proc_init(struct net *net);
893void tcp6_proc_exit(struct net *net);
894int udp6_proc_init(struct net *net);
895void udp6_proc_exit(struct net *net);
896int udplite6_proc_init(void);
897void udplite6_proc_exit(void);
898int ipv6_misc_proc_init(void);
899void ipv6_misc_proc_exit(void);
900int snmp6_register_dev(struct inet6_dev *idev);
901int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300902
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700903#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700904static inline int ac6_proc_init(struct net *net) { return 0; }
905static inline void ac6_proc_exit(struct net *net) { }
906static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
907static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300908#endif
909
910#ifdef CONFIG_SYSCTL
Joe Perches9e8cda32013-06-13 19:37:53 -0700911extern struct ctl_table ipv6_route_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300912
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700913struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
914struct ctl_table *ipv6_route_sysctl_init(struct net *net);
915int ipv6_sysctl_register(void);
916void ipv6_sysctl_unregister(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300917#endif
918
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919#endif /* _NET_IPV6_H */