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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>
Herbert Xu20283d82007-07-30 17:05:49 -070018#include <net/if_inet6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <net/ndisc.h>
20#include <net/flow.h>
21#include <net/snmp.h>
22
23#define SIN6_LEN_RFC2133 24
24
25#define IPV6_MAXPLEN 65535
26
27/*
28 * NextHeader field of IPv6 header
29 */
30
31#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
32#define NEXTHDR_TCP 6 /* TCP segment. */
33#define NEXTHDR_UDP 17 /* UDP message. */
34#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
35#define NEXTHDR_ROUTING 43 /* Routing header. */
36#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
37#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
38#define NEXTHDR_AUTH 51 /* Authentication header. */
39#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
40#define NEXTHDR_NONE 59 /* No next header */
41#define NEXTHDR_DEST 60 /* Destination options header. */
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070042#define NEXTHDR_MOBILITY 135 /* Mobility header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44#define NEXTHDR_MAX 255
45
46
47
48#define IPV6_DEFAULT_HOPLIMIT 64
49#define IPV6_DEFAULT_MCASTHOPS 1
50
51/*
52 * Addr type
53 *
54 * type - unicast | multicast
55 * scope - local | site | global
56 * v4 - compat
57 * v4mapped
58 * any
59 * loopback
60 */
61
62#define IPV6_ADDR_ANY 0x0000U
63
64#define IPV6_ADDR_UNICAST 0x0001U
65#define IPV6_ADDR_MULTICAST 0x0002U
66
67#define IPV6_ADDR_LOOPBACK 0x0010U
68#define IPV6_ADDR_LINKLOCAL 0x0020U
69#define IPV6_ADDR_SITELOCAL 0x0040U
70
71#define IPV6_ADDR_COMPATv4 0x0080U
72
73#define IPV6_ADDR_SCOPE_MASK 0x00f0U
74
75#define IPV6_ADDR_MAPPED 0x1000U
76#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
77
78/*
79 * Addr scopes
80 */
81#ifdef __KERNEL__
82#define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
84#define __IPV6_ADDR_SCOPE_INVALID -1
85#endif
86#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
87#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
88#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
89#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
90#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
91
92/*
93 * fragmentation header
94 */
95
96struct frag_hdr {
Al Viro44473a62006-11-08 00:21:46 -080097 __u8 nexthdr;
98 __u8 reserved;
99 __be16 frag_off;
100 __be32 identification;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101};
102
103#define IP6_MF 0x0001
104
105#ifdef __KERNEL__
106
107#include <net/sock.h>
108
109/* sysctls */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110extern int sysctl_mld_max_msf;
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800111extern struct ctl_path net_ipv6_ctl_path[];
112
Denis V. Lunev087fe242008-10-08 10:35:11 -0700113#define _DEVINC(net, statname, modifier, idev, field) \
David L Stevens14878f72007-09-16 16:52:35 -0700114({ \
115 struct inet6_dev *_idev = (idev); \
116 if (likely(_idev != NULL)) \
117 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700118 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
David L Stevens14878f72007-09-16 16:52:35 -0700119})
120
Denis V. Lunev087fe242008-10-08 10:35:11 -0700121#define _DEVADD(net, statname, modifier, idev, field, val) \
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700122({ \
123 struct inet6_dev *_idev = (idev); \
124 if (likely(_idev != NULL)) \
125 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
Denis V. Lunev9261e532008-10-08 10:36:03 -0700126 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -0700127})
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/* MIBs */
David L Stevens14878f72007-09-16 16:52:35 -0700130
Denis V. Lunev087fe242008-10-08 10:35:11 -0700131#define IP6_INC_STATS(net, idev,field) \
132 _DEVINC(net, ipv6, , idev, field)
133#define IP6_INC_STATS_BH(net, idev,field) \
134 _DEVINC(net, ipv6, _BH, idev, field)
135#define IP6_ADD_STATS_BH(net, idev,field,val) \
136 _DEVADD(net, ipv6, _BH, idev, field, val)
David L Stevens14878f72007-09-16 16:52:35 -0700137
Denis V. Lunev087fe242008-10-08 10:35:11 -0700138#define ICMP6_INC_STATS(net, idev, field) \
139 _DEVINC(net, icmpv6, , idev, field)
140#define ICMP6_INC_STATS_BH(net, idev, field) \
141 _DEVINC(net, icmpv6, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700142
Denis V. Lunev087fe242008-10-08 10:35:11 -0700143#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
144 _DEVINC(net, icmpv6msg, , idev, field +256)
145#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
146 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
147#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
148 _DEVINC(net, icmpv6msg, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150struct ip6_ra_chain
151{
152 struct ip6_ra_chain *next;
153 struct sock *sk;
154 int sel;
155 void (*destructor)(struct sock *);
156};
157
158extern struct ip6_ra_chain *ip6_ra_chain;
159extern rwlock_t ip6_ra_lock;
160
161/*
162 This structure is prepared by protocol, when parsing
163 ancillary data and passed to IPv6.
164 */
165
166struct ipv6_txoptions
167{
168 /* Length of this structure */
169 int tot_len;
170
171 /* length of extension headers */
172
173 __u16 opt_flen; /* after fragment hdr */
174 __u16 opt_nflen; /* before fragment hdr */
175
176 struct ipv6_opt_hdr *hopopt;
177 struct ipv6_opt_hdr *dst0opt;
178 struct ipv6_rt_hdr *srcrt; /* Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 struct ipv6_opt_hdr *dst1opt;
180
181 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
182};
183
184struct ip6_flowlabel
185{
186 struct ip6_flowlabel *next;
Al Viro90bcaf72006-11-08 00:25:17 -0800187 __be32 label;
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700188 atomic_t users;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 struct in6_addr dst;
190 struct ipv6_txoptions *opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 unsigned long linger;
192 u8 share;
193 u32 owner;
194 unsigned long lastuse;
195 unsigned long expires;
Benjamin Thery60e8fbc2008-03-26 16:53:08 -0700196 struct net *fl_net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197};
198
199#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
200#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
201
202struct ipv6_fl_socklist
203{
204 struct ipv6_fl_socklist *next;
205 struct ip6_flowlabel *fl;
206};
207
Al Viro90bcaf72006-11-08 00:25:17 -0800208extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
210 struct ip6_flowlabel * fl,
211 struct ipv6_txoptions * fopt);
212extern void fl6_free_socklist(struct sock *sk);
213extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800214extern int ip6_flowlabel_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215extern void ip6_flowlabel_cleanup(void);
216
217static inline void fl6_sock_release(struct ip6_flowlabel *fl)
218{
219 if (fl)
220 atomic_dec(&fl->users);
221}
222
Denis V. Lunev725a8ff2008-07-19 00:28:58 -0700223extern int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Herbert Xue5bbef22007-10-15 12:50:28 -0700225extern int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900228extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
229 int newtype,
230 struct ipv6_opt_hdr __user *newopt,
231 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900232struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
233 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800235extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
236
Pavel Emelyanove5a2bb8422008-01-22 06:06:23 -0800237int ip6_frag_nqueues(struct net *net);
Pavel Emelyanov6ddc0822008-01-22 06:07:25 -0800238int ip6_frag_mem(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
241
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800242extern int __ipv6_addr_type(const struct in6_addr *addr);
243static inline int ipv6_addr_type(const struct in6_addr *addr)
244{
245 return __ipv6_addr_type(addr) & 0xffff;
246}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248static inline int ipv6_addr_scope(const struct in6_addr *addr)
249{
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800250 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
251}
252
253static inline int __ipv6_addr_src_scope(int type)
254{
255 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
256}
257
258static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
259{
260 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
263static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
264{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700265 return memcmp(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266}
267
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800268static inline int
269ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
270 const struct in6_addr *a2)
271{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900272 return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
273 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
274 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
275 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800276}
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
279{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700280 memcpy(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
283static inline void ipv6_addr_prefix(struct in6_addr *pfx,
284 const struct in6_addr *addr,
285 int plen)
286{
287 /* caller must guarantee 0 <= plen <= 128 */
288 int o = plen >> 3,
289 b = plen & 0x7;
290
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700291 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 memcpy(pfx->s6_addr, addr, o);
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700293 if (b != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295}
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297static inline void ipv6_addr_set(struct in6_addr *addr,
Al Viro48818f82006-09-27 18:44:54 -0700298 __be32 w1, __be32 w2,
299 __be32 w3, __be32 w4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
301 addr->s6_addr32[0] = w1;
302 addr->s6_addr32[1] = w2;
303 addr->s6_addr32[2] = w3;
304 addr->s6_addr32[3] = w4;
305}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
307static inline int ipv6_addr_equal(const struct in6_addr *a1,
308 const struct in6_addr *a2)
309{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900310 return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
311 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
312 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
313 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
Al Viro48818f82006-09-27 18:44:54 -0700316static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 unsigned int prefixlen)
318{
319 unsigned pdw, pbi;
320
321 /* check complete u32 in prefix */
322 pdw = prefixlen >> 5;
323 if (pdw && memcmp(a1, a2, pdw << 2))
324 return 0;
325
326 /* check incomplete u32 in prefix */
327 pbi = prefixlen & 0x1f;
328 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
329 return 0;
330
331 return 1;
332}
333
334static inline int ipv6_prefix_equal(const struct in6_addr *a1,
335 const struct in6_addr *a2,
336 unsigned int prefixlen)
337{
338 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
339 prefixlen);
340}
341
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700342struct inet_frag_queue;
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700343
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700344struct ip6_create_arg {
345 __be32 id;
346 struct in6_addr *src;
347 struct in6_addr *dst;
348};
349
350void ip6_frag_init(struct inet_frag_queue *q, void *a);
Pavel Emelyanovabd65232007-10-17 19:47:21 -0700351int ip6_frag_match(struct inet_frag_queue *q, void *a);
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353static inline int ipv6_addr_any(const struct in6_addr *a)
354{
355 return ((a->s6_addr32[0] | a->s6_addr32[1] |
356 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
357}
358
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700359static inline int ipv6_addr_loopback(const struct in6_addr *a)
360{
361 return ((a->s6_addr32[0] | a->s6_addr32[1] |
362 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
363}
364
Brian Haleye773e4f2007-08-24 23:16:08 -0700365static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
366{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900367 return ((a->s6_addr32[0] | a->s6_addr32[1] |
368 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
Brian Haleye773e4f2007-08-24 23:16:08 -0700369}
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800372 * Check for a RFC 4843 ORCHID address
373 * (Overlay Routable Cryptographic Hash Identifiers)
374 */
375static inline int ipv6_addr_orchid(const struct in6_addr *a)
376{
377 return ((a->s6_addr32[0] & htonl(0xfffffff0))
378 == htonl(0x20010010));
379}
380
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100381static inline void ipv6_addr_set_v4mapped(const __be32 addr,
382 struct in6_addr *v4mapped)
383{
384 ipv6_addr_set(v4mapped,
385 0, 0,
386 htonl(0x0000FFFF),
387 addr);
388}
389
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800390/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800391 * find the first different bit between two addresses
392 * length of address must be a multiple of 32bits
393 */
394static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
395{
Al Viroef296f52006-11-14 20:56:33 -0800396 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800397 int i;
398
399 addrlen >>= 2;
400
401 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800402 __be32 xb = a1[i] ^ a2[i];
403 if (xb)
404 return i * 32 + 32 - fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800405 }
406
407 /*
408 * we should *never* get to this point since that
409 * would mean the addrs are equal
410 *
411 * However, we do get to it 8) And exacly, when
412 * addresses are equal 8)
413 *
414 * ip route add 1111::/128 via ...
415 * ip route add 1111::/64 via ...
416 * and we are here.
417 *
418 * Ideally, this function should stop comparison
419 * at prefix length. It does not, but it is still OK,
420 * if returned value is greater than prefix length.
421 * --ANK (980803)
422 */
423 return (addrlen << 5);
424}
425
426static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
427{
428 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
429}
430
431/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 * Prototypes exported by ipv6
433 */
434
435/*
436 * rcv function (called from netdevice level)
437 */
438
439extern int ipv6_rcv(struct sk_buff *skb,
440 struct net_device *dev,
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700441 struct packet_type *pt,
442 struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Patrick McHardyb05e1062006-01-06 23:03:34 -0800444extern int ip6_rcv_finish(struct sk_buff *skb);
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446/*
447 * upper-layer output functions
448 */
449extern int ip6_xmit(struct sock *sk,
450 struct sk_buff *skb,
451 struct flowi *fl,
452 struct ipv6_txoptions *opt,
453 int ipfragok);
454
455extern int ip6_nd_hdr(struct sock *sk,
456 struct sk_buff *skb,
457 struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900458 const struct in6_addr *saddr,
459 const struct in6_addr *daddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 int proto, int len);
461
462extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
463
464extern int ip6_append_data(struct sock *sk,
465 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
466 void *from,
467 int length,
468 int transhdrlen,
469 int hlimit,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900470 int tclass,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 struct ipv6_txoptions *opt,
472 struct flowi *fl,
473 struct rt6_info *rt,
474 unsigned int flags);
475
476extern int ip6_push_pending_frames(struct sock *sk);
477
478extern void ip6_flush_pending_frames(struct sock *sk);
479
480extern int ip6_dst_lookup(struct sock *sk,
481 struct dst_entry **dst,
482 struct flowi *fl);
David S. Miller14e50e52007-05-24 18:17:54 -0700483extern int ip6_dst_blackhole(struct sock *sk,
484 struct dst_entry **dst,
485 struct flowi *fl);
Herbert Xu497c6152006-07-30 20:19:33 -0700486extern int ip6_sk_dst_lookup(struct sock *sk,
487 struct dst_entry **dst,
488 struct flowi *fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490/*
491 * skb processing functions
492 */
493
494extern int ip6_output(struct sk_buff *skb);
495extern int ip6_forward(struct sk_buff *skb);
496extern int ip6_input(struct sk_buff *skb);
497extern int ip6_mc_input(struct sk_buff *skb);
498
Herbert Xuef76bc22008-01-11 19:15:08 -0800499extern int __ip6_local_out(struct sk_buff *skb);
500extern int ip6_local_out(struct sk_buff *skb);
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502/*
503 * Extension header (options) processing
504 */
505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
507 struct ipv6_txoptions *opt,
508 u8 *proto,
509 struct in6_addr **daddr_p);
510extern void ipv6_push_frag_opts(struct sk_buff *skb,
511 struct ipv6_txoptions *opt,
512 u8 *proto);
513
514extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
Herbert Xu0d3d0772005-04-24 20:16:19 -0700515 u8 *nexthdrp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
517extern int ipv6_ext_hdr(u8 nexthdr);
518
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700519extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521/*
522 * socket options (ipv6_sockglue.c)
523 */
524
525extern int ipv6_setsockopt(struct sock *sk, int level,
526 int optname,
527 char __user *optval,
528 int optlen);
529extern int ipv6_getsockopt(struct sock *sk, int level,
530 int optname,
531 char __user *optval,
532 int __user *optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800533extern int compat_ipv6_setsockopt(struct sock *sk,
534 int level,
535 int optname,
536 char __user *optval,
537 int optlen);
538extern int compat_ipv6_getsockopt(struct sock *sk,
539 int level,
540 int optname,
541 char __user *optval,
542 int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544extern int ip6_datagram_connect(struct sock *sk,
545 struct sockaddr *addr, int addr_len);
546
547extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
Al Viroe69a4ad2006-11-14 20:56:00 -0800548extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 u32 info, u8 *payload);
550extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
551
552extern int inet6_release(struct socket *sock);
553extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
554 int addr_len);
555extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
556 int *uaddr_len, int peer);
557extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
558 unsigned long arg);
559
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800560extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
561 struct sock *sk);
562
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563/*
564 * reassembly.c
565 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800566extern const struct proto_ops inet6_stream_ops;
567extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300568
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200569struct group_source_req;
570struct group_filter;
571
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300572extern int ip6_mc_source(int add, int omode, struct sock *sk,
573 struct group_source_req *pgsr);
574extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
575extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
576 struct group_filter __user *optval,
577 int __user *optlen);
Ilpo Järvinen93c8b902008-10-01 02:48:31 -0700578extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
579 const struct in6_addr *daddr, u32 rnd);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300580
581#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700582extern int ac6_proc_init(struct net *net);
583extern void ac6_proc_exit(struct net *net);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300584extern int raw6_proc_init(void);
585extern void raw6_proc_exit(void);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700586extern int tcp6_proc_init(struct net *net);
587extern void tcp6_proc_exit(struct net *net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700588extern int udp6_proc_init(struct net *net);
589extern void udp6_proc_exit(struct net *net);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800590extern int udplite6_proc_init(void);
591extern void udplite6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300592extern int ipv6_misc_proc_init(void);
593extern void ipv6_misc_proc_exit(void);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700594extern int snmp6_register_dev(struct inet6_dev *idev);
595extern int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300596
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700597#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700598static inline int ac6_proc_init(struct net *net) { return 0; }
599static inline void ac6_proc_exit(struct net *net) { }
600static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
601static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300602#endif
603
604#ifdef CONFIG_SYSCTL
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800605extern ctl_table ipv6_route_table_template[];
606extern ctl_table ipv6_icmp_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300607
Daniel Lezcano6de1a912008-02-05 02:57:59 -0800608extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
609extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
Daniel Lezcano291480c2008-01-10 02:47:55 -0800610extern int ipv6_sysctl_register(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300611extern void ipv6_sysctl_unregister(void);
Al Viroeeb61f72008-07-27 08:59:33 +0100612extern int ipv6_static_sysctl_register(void);
613extern void ipv6_static_sysctl_unregister(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300614#endif
615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616#endif /* __KERNEL__ */
617#endif /* _NET_IPV6_H */