blob: 92db8617d18842092c8ee635b33e35cfecba33d9 [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>
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
Neil Hormanedf391f2009-04-27 02:45:02 -0700129#define _DEVUPD(net, statname, modifier, idev, field, val) \
130({ \
131 struct inet6_dev *_idev = (idev); \
132 if (likely(_idev != NULL)) \
133 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
134 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
135})
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137/* MIBs */
David L Stevens14878f72007-09-16 16:52:35 -0700138
Denis V. Lunev087fe242008-10-08 10:35:11 -0700139#define IP6_INC_STATS(net, idev,field) \
140 _DEVINC(net, ipv6, , idev, field)
141#define IP6_INC_STATS_BH(net, idev,field) \
142 _DEVINC(net, ipv6, _BH, idev, field)
Neil Hormanedf391f2009-04-27 02:45:02 -0700143#define IP6_ADD_STATS(net, idev,field,val) \
144 _DEVADD(net, ipv6, , idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700145#define IP6_ADD_STATS_BH(net, idev,field,val) \
146 _DEVADD(net, ipv6, _BH, idev, field, val)
Neil Hormanedf391f2009-04-27 02:45:02 -0700147#define IP6_UPD_PO_STATS(net, idev,field,val) \
148 _DEVUPD(net, ipv6, , idev, field, val)
149#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
150 _DEVUPD(net, ipv6, _BH, idev, field, val)
Denis V. Lunev087fe242008-10-08 10:35:11 -0700151#define ICMP6_INC_STATS(net, idev, field) \
152 _DEVINC(net, icmpv6, , idev, field)
153#define ICMP6_INC_STATS_BH(net, idev, field) \
154 _DEVINC(net, icmpv6, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700155
Denis V. Lunev087fe242008-10-08 10:35:11 -0700156#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
157 _DEVINC(net, icmpv6msg, , idev, field +256)
158#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
159 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
160#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
161 _DEVINC(net, icmpv6msg, _BH, idev, field)
David L Stevens14878f72007-09-16 16:52:35 -0700162
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000163struct ip6_ra_chain {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 struct ip6_ra_chain *next;
165 struct sock *sk;
166 int sel;
167 void (*destructor)(struct sock *);
168};
169
170extern struct ip6_ra_chain *ip6_ra_chain;
171extern rwlock_t ip6_ra_lock;
172
173/*
174 This structure is prepared by protocol, when parsing
175 ancillary data and passed to IPv6.
176 */
177
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000178struct ipv6_txoptions {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 /* Length of this structure */
180 int tot_len;
181
182 /* length of extension headers */
183
184 __u16 opt_flen; /* after fragment hdr */
185 __u16 opt_nflen; /* before fragment hdr */
186
187 struct ipv6_opt_hdr *hopopt;
188 struct ipv6_opt_hdr *dst0opt;
189 struct ipv6_rt_hdr *srcrt; /* Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 struct ipv6_opt_hdr *dst1opt;
191
192 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
193};
194
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000195struct ip6_flowlabel {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 struct ip6_flowlabel *next;
Al Viro90bcaf72006-11-08 00:25:17 -0800197 __be32 label;
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700198 atomic_t users;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 struct in6_addr dst;
200 struct ipv6_txoptions *opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 unsigned long linger;
202 u8 share;
203 u32 owner;
204 unsigned long lastuse;
205 unsigned long expires;
Benjamin Thery60e8fbc2008-03-26 16:53:08 -0700206 struct net *fl_net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207};
208
Harvey Harrisonf3a7c662009-02-14 22:58:35 -0800209#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
210#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000212struct ipv6_fl_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct ipv6_fl_socklist *next;
214 struct ip6_flowlabel *fl;
215};
216
Al Viro90bcaf72006-11-08 00:25:17 -0800217extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
219 struct ip6_flowlabel * fl,
220 struct ipv6_txoptions * fopt);
221extern void fl6_free_socklist(struct sock *sk);
222extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800223extern int ip6_flowlabel_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224extern void ip6_flowlabel_cleanup(void);
225
226static inline void fl6_sock_release(struct ip6_flowlabel *fl)
227{
228 if (fl)
229 atomic_dec(&fl->users);
230}
231
Denis V. Lunev725a8ff2008-07-19 00:28:58 -0700232extern int ip6_ra_control(struct sock *sk, int sel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Herbert Xue5bbef22007-10-15 12:50:28 -0700234extern int ipv6_parse_hopopts(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900237extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
238 int newtype,
239 struct ipv6_opt_hdr __user *newopt,
240 int newoptlen);
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900241struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
242 struct ipv6_txoptions *opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800244extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
245
Pavel Emelyanove5a2bb8422008-01-22 06:06:23 -0800246int ip6_frag_nqueues(struct net *net);
Pavel Emelyanov6ddc0822008-01-22 06:07:25 -0800247int ip6_frag_mem(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
250
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800251extern int __ipv6_addr_type(const struct in6_addr *addr);
252static inline int ipv6_addr_type(const struct in6_addr *addr)
253{
254 return __ipv6_addr_type(addr) & 0xffff;
255}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257static inline int ipv6_addr_scope(const struct in6_addr *addr)
258{
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -0800259 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
260}
261
262static inline int __ipv6_addr_src_scope(int type)
263{
264 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
265}
266
267static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
268{
269 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270}
271
272static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
273{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700274 return memcmp(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275}
276
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800277static inline int
278ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
279 const struct in6_addr *a2)
280{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900281 return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
282 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
283 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
284 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
Patrick McHardyf2ffd9e2006-03-20 18:03:16 -0800285}
286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
288{
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700289 memcpy(a1, a2, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
292static inline void ipv6_addr_prefix(struct in6_addr *pfx,
293 const struct in6_addr *addr,
294 int plen)
295{
296 /* caller must guarantee 0 <= plen <= 128 */
297 int o = plen >> 3,
298 b = plen & 0x7;
299
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700300 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 memcpy(pfx->s6_addr, addr, o);
Eric Dumazetdb3459d2007-05-03 17:39:04 -0700302 if (b != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304}
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306static inline void ipv6_addr_set(struct in6_addr *addr,
Al Viro48818f82006-09-27 18:44:54 -0700307 __be32 w1, __be32 w2,
308 __be32 w3, __be32 w4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
310 addr->s6_addr32[0] = w1;
311 addr->s6_addr32[1] = w2;
312 addr->s6_addr32[2] = w3;
313 addr->s6_addr32[3] = w4;
314}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316static inline int ipv6_addr_equal(const struct in6_addr *a1,
317 const struct in6_addr *a2)
318{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900319 return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
320 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
321 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
322 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323}
324
Al Viro48818f82006-09-27 18:44:54 -0700325static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 unsigned int prefixlen)
327{
328 unsigned pdw, pbi;
329
330 /* check complete u32 in prefix */
331 pdw = prefixlen >> 5;
332 if (pdw && memcmp(a1, a2, pdw << 2))
333 return 0;
334
335 /* check incomplete u32 in prefix */
336 pbi = prefixlen & 0x1f;
337 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
338 return 0;
339
340 return 1;
341}
342
343static inline int ipv6_prefix_equal(const struct in6_addr *a1,
344 const struct in6_addr *a2,
345 unsigned int prefixlen)
346{
347 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
348 prefixlen);
349}
350
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700351struct inet_frag_queue;
Pavel Emelyanov2588fe12007-10-17 19:44:34 -0700352
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700353struct ip6_create_arg {
354 __be32 id;
355 struct in6_addr *src;
356 struct in6_addr *dst;
357};
358
359void ip6_frag_init(struct inet_frag_queue *q, void *a);
Pavel Emelyanovabd65232007-10-17 19:47:21 -0700360int ip6_frag_match(struct inet_frag_queue *q, void *a);
Pavel Emelyanovc6fda282007-10-17 19:46:47 -0700361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362static inline int ipv6_addr_any(const struct in6_addr *a)
363{
364 return ((a->s6_addr32[0] | a->s6_addr32[1] |
365 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
366}
367
YOSHIFUJI Hideakif630e432008-06-19 16:33:57 -0700368static inline int ipv6_addr_loopback(const struct in6_addr *a)
369{
370 return ((a->s6_addr32[0] | a->s6_addr32[1] |
371 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
372}
373
Brian Haleye773e4f2007-08-24 23:16:08 -0700374static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
375{
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900376 return ((a->s6_addr32[0] | a->s6_addr32[1] |
377 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
Brian Haleye773e4f2007-08-24 23:16:08 -0700378}
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380/*
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800381 * Check for a RFC 4843 ORCHID address
382 * (Overlay Routable Cryptographic Hash Identifiers)
383 */
384static inline int ipv6_addr_orchid(const struct in6_addr *a)
385{
386 return ((a->s6_addr32[0] & htonl(0xfffffff0))
387 == htonl(0x20010010));
388}
389
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100390static inline void ipv6_addr_set_v4mapped(const __be32 addr,
391 struct in6_addr *v4mapped)
392{
393 ipv6_addr_set(v4mapped,
394 0, 0,
395 htonl(0x0000FFFF),
396 addr);
397}
398
Juha-Matti Tapio99cd07a2008-02-28 20:55:46 -0800399/*
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800400 * find the first different bit between two addresses
401 * length of address must be a multiple of 32bits
402 */
403static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
404{
Al Viroef296f52006-11-14 20:56:33 -0800405 const __be32 *a1 = token1, *a2 = token2;
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800406 int i;
407
408 addrlen >>= 2;
409
410 for (i = 0; i < addrlen; i++) {
Al Viroef296f52006-11-14 20:56:33 -0800411 __be32 xb = a1[i] ^ a2[i];
412 if (xb)
413 return i * 32 + 32 - fls(ntohl(xb));
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800414 }
415
416 /*
417 * we should *never* get to this point since that
418 * would mean the addrs are equal
419 *
420 * However, we do get to it 8) And exacly, when
421 * addresses are equal 8)
422 *
423 * ip route add 1111::/128 via ...
424 * ip route add 1111::/64 via ...
425 * and we are here.
426 *
427 * Ideally, this function should stop comparison
428 * at prefix length. It does not, but it is still OK,
429 * if returned value is greater than prefix length.
430 * --ANK (980803)
431 */
432 return (addrlen << 5);
433}
434
435static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
436{
437 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
438}
439
Sridhar Samudrala7ea2f2c2009-07-09 08:10:01 +0000440static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
441{
442 static u32 ipv6_fragmentation_id = 1;
443 static DEFINE_SPINLOCK(ip6_id_lock);
444
445 spin_lock_bh(&ip6_id_lock);
446 fhdr->identification = htonl(ipv6_fragmentation_id);
447 if (++ipv6_fragmentation_id == 0)
448 ipv6_fragmentation_id = 1;
449 spin_unlock_bh(&ip6_id_lock);
450}
451
YOSHIFUJI Hideaki971f3592005-11-08 09:37:56 -0800452/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 * Prototypes exported by ipv6
454 */
455
456/*
457 * rcv function (called from netdevice level)
458 */
459
460extern int ipv6_rcv(struct sk_buff *skb,
461 struct net_device *dev,
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700462 struct packet_type *pt,
463 struct net_device *orig_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Patrick McHardyb05e1062006-01-06 23:03:34 -0800465extern int ip6_rcv_finish(struct sk_buff *skb);
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467/*
468 * upper-layer output functions
469 */
470extern int ip6_xmit(struct sock *sk,
471 struct sk_buff *skb,
472 struct flowi *fl,
473 struct ipv6_txoptions *opt,
474 int ipfragok);
475
476extern int ip6_nd_hdr(struct sock *sk,
477 struct sk_buff *skb,
478 struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900479 const struct in6_addr *saddr,
480 const struct in6_addr *daddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 int proto, int len);
482
483extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
484
485extern int ip6_append_data(struct sock *sk,
486 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
487 void *from,
488 int length,
489 int transhdrlen,
490 int hlimit,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900491 int tclass,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 struct ipv6_txoptions *opt,
493 struct flowi *fl,
494 struct rt6_info *rt,
495 unsigned int flags);
496
497extern int ip6_push_pending_frames(struct sock *sk);
498
499extern void ip6_flush_pending_frames(struct sock *sk);
500
501extern int ip6_dst_lookup(struct sock *sk,
502 struct dst_entry **dst,
503 struct flowi *fl);
David S. Miller14e50e52007-05-24 18:17:54 -0700504extern int ip6_dst_blackhole(struct sock *sk,
505 struct dst_entry **dst,
506 struct flowi *fl);
Herbert Xu497c6152006-07-30 20:19:33 -0700507extern int ip6_sk_dst_lookup(struct sock *sk,
508 struct dst_entry **dst,
509 struct flowi *fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511/*
512 * skb processing functions
513 */
514
515extern int ip6_output(struct sk_buff *skb);
516extern int ip6_forward(struct sk_buff *skb);
517extern int ip6_input(struct sk_buff *skb);
518extern int ip6_mc_input(struct sk_buff *skb);
519
Herbert Xuef76bc22008-01-11 19:15:08 -0800520extern int __ip6_local_out(struct sk_buff *skb);
521extern int ip6_local_out(struct sk_buff *skb);
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523/*
524 * Extension header (options) processing
525 */
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
528 struct ipv6_txoptions *opt,
529 u8 *proto,
530 struct in6_addr **daddr_p);
531extern void ipv6_push_frag_opts(struct sk_buff *skb,
532 struct ipv6_txoptions *opt,
533 u8 *proto);
534
535extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
Herbert Xu0d3d0772005-04-24 20:16:19 -0700536 u8 *nexthdrp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
538extern int ipv6_ext_hdr(u8 nexthdr);
539
Masahide NAKAMURAc61a4042006-08-23 19:18:35 -0700540extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542/*
543 * socket options (ipv6_sockglue.c)
544 */
545
546extern int ipv6_setsockopt(struct sock *sk, int level,
547 int optname,
548 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700549 unsigned int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550extern int ipv6_getsockopt(struct sock *sk, int level,
551 int optname,
552 char __user *optval,
553 int __user *optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800554extern int compat_ipv6_setsockopt(struct sock *sk,
555 int level,
556 int optname,
557 char __user *optval,
David S. Millerb7058842009-09-30 16:12:20 -0700558 unsigned int optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800559extern int compat_ipv6_getsockopt(struct sock *sk,
560 int level,
561 int optname,
562 char __user *optval,
563 int __user *optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565extern int ip6_datagram_connect(struct sock *sk,
566 struct sockaddr *addr, int addr_len);
567
568extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
Al Viroe69a4ad2006-11-14 20:56:00 -0800569extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 u32 info, u8 *payload);
571extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
572
573extern int inet6_release(struct socket *sock);
574extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
575 int addr_len);
576extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
577 int *uaddr_len, int peer);
578extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
579 unsigned long arg);
580
Arnaldo Carvalho de Melod8313f52005-12-13 23:25:44 -0800581extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
582 struct sock *sk);
583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584/*
585 * reassembly.c
586 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800587extern const struct proto_ops inet6_stream_ops;
588extern const struct proto_ops inet6_dgram_ops;
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300589
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200590struct group_source_req;
591struct group_filter;
592
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300593extern int ip6_mc_source(int add, int omode, struct sock *sk,
594 struct group_source_req *pgsr);
595extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
596extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
597 struct group_filter __user *optval,
598 int __user *optlen);
Ilpo Järvinen93c8b902008-10-01 02:48:31 -0700599extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
600 const struct in6_addr *daddr, u32 rnd);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300601
602#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700603extern int ac6_proc_init(struct net *net);
604extern void ac6_proc_exit(struct net *net);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300605extern int raw6_proc_init(void);
606extern void raw6_proc_exit(void);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700607extern int tcp6_proc_init(struct net *net);
608extern void tcp6_proc_exit(struct net *net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700609extern int udp6_proc_init(struct net *net);
610extern void udp6_proc_exit(struct net *net);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800611extern int udplite6_proc_init(void);
612extern void udplite6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300613extern int ipv6_misc_proc_init(void);
614extern void ipv6_misc_proc_exit(void);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700615extern int snmp6_register_dev(struct inet6_dev *idev);
616extern int snmp6_unregister_dev(struct inet6_dev *idev);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300617
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700618#else
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700619static inline int ac6_proc_init(struct net *net) { return 0; }
620static inline void ac6_proc_exit(struct net *net) { }
621static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
622static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300623#endif
624
625#ifdef CONFIG_SYSCTL
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800626extern ctl_table ipv6_route_table_template[];
627extern ctl_table ipv6_icmp_table_template[];
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300628
Daniel Lezcano6de1a912008-02-05 02:57:59 -0800629extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
630extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
Daniel Lezcano291480c2008-01-10 02:47:55 -0800631extern int ipv6_sysctl_register(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300632extern void ipv6_sysctl_unregister(void);
Al Viroeeb61f72008-07-27 08:59:33 +0100633extern int ipv6_static_sysctl_register(void);
634extern void ipv6_static_sysctl_unregister(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300635#endif
636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637#endif /* __KERNEL__ */
638#endif /* _NET_IPV6_H */