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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[deliverable/linux.git] / include / net / ipv6.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
1da177e4
LT		 7 * 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>
20283d84 18#include <net/if_inet6.h>
1da177e4
LT		 19#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. */
c12b395a 37#define NEXTHDR_GRE 47 /* GRE header. */
1da177e4
LT		 38#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
39#define NEXTHDR_AUTH 51 /* Authentication header. */
40#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
41#define NEXTHDR_NONE 59 /* No next header */
42#define NEXTHDR_DEST 60 /* Destination options header. */
2b741653 43#define NEXTHDR_MOBILITY 135 /* Mobility header. */
1da177e4
LT		 44
45#define NEXTHDR_MAX 255
46
47
48
49#define IPV6_DEFAULT_HOPLIMIT 64
50#define IPV6_DEFAULT_MCASTHOPS 1
51
52/*
53 * Addr type
54 *
55 * type - unicast | multicast
56 * scope - local | site | global
57 * v4 - compat
58 * v4mapped
59 * any
60 * loopback
61 */
62
63#define IPV6_ADDR_ANY 0x0000U
64
65#define IPV6_ADDR_UNICAST 0x0001U
66#define IPV6_ADDR_MULTICAST 0x0002U
67
68#define IPV6_ADDR_LOOPBACK 0x0010U
69#define IPV6_ADDR_LINKLOCAL 0x0020U
70#define IPV6_ADDR_SITELOCAL 0x0040U
71
72#define IPV6_ADDR_COMPATv4 0x0080U
73
74#define IPV6_ADDR_SCOPE_MASK 0x00f0U
75
76#define IPV6_ADDR_MAPPED 0x1000U
1da177e4
LT		 77
78/*
79 * Addr scopes
80 */
1da177e4
LT		 81#define IPV6_ADDR_MC_SCOPE(a) \
82 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
83#define __IPV6_ADDR_SCOPE_INVALID -1
1da177e4
LT		 84#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
85#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
86#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
87#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
88#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
89
5ced1339
LL		 90/*
91 * Addr flags
92 */
5ced1339
LL		 93#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
94 ((a)->s6_addr[1] & 0x10)
95#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
96 ((a)->s6_addr[1] & 0x20)
97#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
98 ((a)->s6_addr[1] & 0x40)
5ced1339 99
1da177e4
LT		 100/*
101 * fragmentation header
102 */
103
104struct frag_hdr {
44473a6b
AV		 105 __u8 nexthdr;
106 __u8 reserved;
107 __be16 frag_off;
108 __be32 identification;
1da177e4
LT		 109};
110
111#define IP6_MF 0x0001
112
1da177e4
LT		 113#include <net/sock.h>
114
115/* sysctls */
1da177e4 116extern int sysctl_mld_max_msf;
3d7cc2ba 117
087fe240 118#define _DEVINC(net, statname, modifier, idev, field) \
14878f75 119({ \
a11d206d
YH		 120 struct inet6_dev *_idev = (idev); \
121 if (likely(_idev != NULL)) \
14878f75 122 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
9261e537 123 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
a11d206d 124})
14878f75 125
be281e55
ED		 126/* per device counters are atomic_long_t */
127#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
128({ \
129 struct inet6_dev *_idev = (idev); \
130 if (likely(_idev != NULL)) \
131 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
132 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
133})
134
2a24444f
ED		 135/* per device and per net counters are atomic_long_t */
136#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
137({ \
138 struct inet6_dev *_idev = (idev); \
139 if (likely(_idev != NULL)) \
140 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
141 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
142})
143
087fe240 144#define _DEVADD(net, statname, modifier, idev, field, val) \
8e7999c4
PE		 145({ \
146 struct inet6_dev *_idev = (idev); \
147 if (likely(_idev != NULL)) \
148 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
9261e537 149 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
8e7999c4
PE		 150})
151
edf391ff
NH		 152#define _DEVUPD(net, statname, modifier, idev, field, val) \
153({ \
154 struct inet6_dev *_idev = (idev); \
155 if (likely(_idev != NULL)) \
156 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
157 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
158})
159
14878f75 160/* MIBs */
14878f75 161
087fe240 162#define IP6_INC_STATS(net, idev,field) \
4ce3c183 163 _DEVINC(net, ipv6, 64, idev, field)
087fe240 164#define IP6_INC_STATS_BH(net, idev,field) \
4ce3c183 165 _DEVINC(net, ipv6, 64_BH, idev, field)
edf391ff 166#define IP6_ADD_STATS(net, idev,field,val) \
4ce3c183 167 _DEVADD(net, ipv6, 64, idev, field, val)
087fe240 168#define IP6_ADD_STATS_BH(net, idev,field,val) \
4ce3c183 169 _DEVADD(net, ipv6, 64_BH, idev, field, val)
edf391ff 170#define IP6_UPD_PO_STATS(net, idev,field,val) \
4ce3c183 171 _DEVUPD(net, ipv6, 64, idev, field, val)
edf391ff 172#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
4ce3c183 173 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
087fe240 174#define ICMP6_INC_STATS(net, idev, field) \
be281e55 175 _DEVINCATOMIC(net, icmpv6, , idev, field)
087fe240 176#define ICMP6_INC_STATS_BH(net, idev, field) \
be281e55 177 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
087fe240
DL		 178
179#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
2a24444f 180 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
087fe240 181#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
2a24444f 182 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
087fe240 183#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
2a24444f 184 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
14878f75 185
fd2c3ef7 186struct ip6_ra_chain {
1da177e4
LT		 187 struct ip6_ra_chain *next;
188 struct sock *sk;
189 int sel;
190 void (*destructor)(struct sock *);
191};
192
193extern struct ip6_ra_chain *ip6_ra_chain;
194extern rwlock_t ip6_ra_lock;
195
196/*
197 This structure is prepared by protocol, when parsing
198 ancillary data and passed to IPv6.
199 */
200
fd2c3ef7 201struct ipv6_txoptions {
1da177e4
LT		 202 /* Length of this structure */
203 int tot_len;
204
205 /* length of extension headers */
206
207 __u16 opt_flen; /* after fragment hdr */
208 __u16 opt_nflen; /* before fragment hdr */
209
210 struct ipv6_opt_hdr *hopopt;
211 struct ipv6_opt_hdr *dst0opt;
212 struct ipv6_rt_hdr *srcrt; /* Routing Header */
1da177e4
LT		 213 struct ipv6_opt_hdr *dst1opt;
214
215 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
216};
217
fd2c3ef7 218struct ip6_flowlabel {
1da177e4 219 struct ip6_flowlabel *next;
90bcaf7b 220 __be32 label;
db3459d1 221 atomic_t users;
1da177e4
LT		 222 struct in6_addr dst;
223 struct ipv6_txoptions *opt;
1da177e4
LT		 224 unsigned long linger;
225 u8 share;
226 u32 owner;
227 unsigned long lastuse;
228 unsigned long expires;
60e8fbc4 229 struct net *fl_net;
1da177e4
LT		 230};
231
f3a7c66b
HH		 232#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
233#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
1da177e4 234
fd2c3ef7 235struct ipv6_fl_socklist {
1da177e4
LT		 236 struct ipv6_fl_socklist *next;
237 struct ip6_flowlabel *fl;
238};
239
90bcaf7b 240extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
1da177e4
LT		 241extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
242 struct ip6_flowlabel * fl,
243 struct ipv6_txoptions * fopt);
244extern void fl6_free_socklist(struct sock *sk);
245extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
0a3e78ac 246extern int ip6_flowlabel_init(void);
1da177e4
LT		 247extern void ip6_flowlabel_cleanup(void);
248
249static inline void fl6_sock_release(struct ip6_flowlabel *fl)
250{
251 if (fl)
252 atomic_dec(&fl->users);
253}
254
b94f1c09
DM		 255extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
256
725a8ff0 257extern int ip6_ra_control(struct sock *sk, int sel);
1da177e4 258
e5bbef20 259extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 260
261extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 262extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
263 int newtype,
264 struct ipv6_opt_hdr __user *newopt,
265 int newoptlen);
df9890c3
YH		 266struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
267 struct ipv6_txoptions *opt);
1da177e4 268
92113bfd 269extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
399c07de 270
e5a2bb84 271int ip6_frag_nqueues(struct net *net);
6ddc0822 272int ip6_frag_mem(struct net *net);
1da177e4 273
9874c41c
JP		 274#define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
275#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
276#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
1da177e4 277
b1cacb68
YH		 278extern int __ipv6_addr_type(const struct in6_addr *addr);
279static inline int ipv6_addr_type(const struct in6_addr *addr)
280{
281 return __ipv6_addr_type(addr) & 0xffff;
282}
1da177e4
LT		 283
284static inline int ipv6_addr_scope(const struct in6_addr *addr)
285{
b1cacb68
YH		 286 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
287}
288
289static inline int __ipv6_addr_src_scope(int type)
290{
a02cec21 291 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
b1cacb68
YH		 292}
293
294static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
295{
296 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 297}
298
299static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
300{
db3459d1 301 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 302}
303
1a203cb3 304static inline bool
f2ffd9ee
PM		 305ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
306 const struct in6_addr *a2)
307{
1a203cb3
ED		 308#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
309 const unsigned long *ul1 = (const unsigned long *)a1;
310 const unsigned long *ulm = (const unsigned long *)m;
311 const unsigned long *ul2 = (const unsigned long *)a2;
312
313 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
314 ((ul1[1] ^ ul2[1]) & ulm[1]));
315#else
a02cec21
ED		 316 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
317 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
318 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
319 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
1a203cb3 320#endif
f2ffd9ee
PM		 321}
322
1da177e4
LT		 323static inline void ipv6_addr_prefix(struct in6_addr *pfx,
324 const struct in6_addr *addr,
325 int plen)
326{
327 /* caller must guarantee 0 <= plen <= 128 */
328 int o = plen >> 3,
329 b = plen & 0x7;
330
db3459d1 331 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 332 memcpy(pfx->s6_addr, addr, o);
db3459d1 333 if (b != 0)
1da177e4 334 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 335}
336
1da177e4 337static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 338 __be32 w1, __be32 w2,
339 __be32 w3, __be32 w4)
1da177e4
LT		 340{
341 addr->s6_addr32[0] = w1;
342 addr->s6_addr32[1] = w2;
343 addr->s6_addr32[2] = w3;
344 addr->s6_addr32[3] = w4;
345}
1da177e4 346
92113bfd
ED		 347static inline bool ipv6_addr_equal(const struct in6_addr *a1,
348 const struct in6_addr *a2)
1da177e4 349{
1a203cb3
ED		 350#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
351 const unsigned long *ul1 = (const unsigned long *)a1;
352 const unsigned long *ul2 = (const unsigned long *)a2;
353
354 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
355#else
a02cec21
ED		 356 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
357 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
358 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
359 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
1a203cb3 360#endif
1da177e4
LT		 361}
362
92113bfd
ED		 363static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
364 unsigned int prefixlen)
1da177e4 365{
95c96174 366 unsigned int pdw, pbi;
1da177e4
LT		 367
368 /* check complete u32 in prefix */
369 pdw = prefixlen >> 5;
370 if (pdw && memcmp(a1, a2, pdw << 2))
92113bfd 371 return false;
1da177e4
LT		 372
373 /* check incomplete u32 in prefix */
374 pbi = prefixlen & 0x1f;
375 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
92113bfd 376 return false;
1da177e4 377
92113bfd 378 return true;
1da177e4
LT		 379}
380
92113bfd
ED		 381static inline bool ipv6_prefix_equal(const struct in6_addr *a1,
382 const struct in6_addr *a2,
383 unsigned int prefixlen)
1da177e4
LT		 384{
385 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
386 prefixlen);
387}
388
2588fe1d 389struct inet_frag_queue;
2588fe1d 390
0b5ccb2e
PM		 391enum ip6_defrag_users {
392 IP6_DEFRAG_LOCAL_DELIVER,
393 IP6_DEFRAG_CONNTRACK_IN,
4be929be 394 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
0b5ccb2e 395 IP6_DEFRAG_CONNTRACK_OUT,
4be929be 396 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 397 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 398 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
0b5ccb2e
PM		 399};
400
c6fda282
PE		 401struct ip6_create_arg {
402 __be32 id;
0b5ccb2e 403 u32 user;
b71d1d42
ED		 404 const struct in6_addr *src;
405 const struct in6_addr *dst;
c6fda282
PE		 406};
407
408void ip6_frag_init(struct inet_frag_queue *q, void *a);
cbc264ca 409bool ip6_frag_match(struct inet_frag_queue *q, void *a);
c6fda282 410
92113bfd 411static inline bool ipv6_addr_any(const struct in6_addr *a)
1da177e4 412{
1a203cb3
ED		 413#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
414 const unsigned long *ul = (const unsigned long *)a;
415
416 return (ul[0] | ul[1]) == 0UL;
417#else
a02cec21
ED		 418 return (a->s6_addr32[0] | a->s6_addr32[1] |
419 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
1a203cb3 420#endif
1da177e4
LT		 421}
422
ddbe5032
ED		 423static inline u32 ipv6_addr_hash(const struct in6_addr *a)
424{
425#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
426 const unsigned long *ul = (const unsigned long *)a;
427 unsigned long x = ul[0] ^ ul[1];
428
429 return (u32)(x ^ (x >> 32));
430#else
431 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
432 a->s6_addr32[2] ^ a->s6_addr32[3]);
433#endif
434}
435
92113bfd 436static inline bool ipv6_addr_loopback(const struct in6_addr *a)
f630e43a 437{
a02cec21
ED		 438 return (a->s6_addr32[0] | a->s6_addr32[1] |
439 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
f630e43a
YH		 440}
441
92113bfd 442static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
e773e4fa 443{
a02cec21
ED		 444 return (a->s6_addr32[0] | a->s6_addr32[1] |
445 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
e773e4fa
BH		 446}
447
99cd07a5
JMT		 448/*
449 * Check for a RFC 4843 ORCHID address
450 * (Overlay Routable Cryptographic Hash Identifiers)
451 */
92113bfd 452static inline bool ipv6_addr_orchid(const struct in6_addr *a)
99cd07a5 453{
a02cec21 454 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
99cd07a5
JMT		 455}
456
f15364bd
AC		 457static inline void ipv6_addr_set_v4mapped(const __be32 addr,
458 struct in6_addr *v4mapped)
459{
460 ipv6_addr_set(v4mapped,
461 0, 0,
462 htonl(0x0000FFFF),
463 addr);
464}
465
971f359d
YH		 466/*
467 * find the first different bit between two addresses
468 * length of address must be a multiple of 32bits
469 */
470static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
471{
ef296f56 472 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 473 int i;
474
475 addrlen >>= 2;
476
477 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 478 __be32 xb = a1[i] ^ a2[i];
479 if (xb)
d57b8fb8 480 return i * 32 + 31 - __fls(ntohl(xb));
971f359d
YH		 481 }
482
483 /*
484 * we should *never* get to this point since that
485 * would mean the addrs are equal
486 *
487 * However, we do get to it 8) And exacly, when
488 * addresses are equal 8)
489 *
490 * ip route add 1111::/128 via ...
491 * ip route add 1111::/64 via ...
492 * and we are here.
493 *
494 * Ideally, this function should stop comparison
495 * at prefix length. It does not, but it is still OK,
496 * if returned value is greater than prefix length.
497 * --ANK (980803)
498 */
a02cec21 499 return addrlen << 5;
971f359d
YH		 500}
501
502static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
503{
504 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
505}
506
87c48fa3 507extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
7ea2f2c5 508
1da177e4
LT		 509/*
510 * Prototypes exported by ipv6
511 */
512
513/*
514 * rcv function (called from netdevice level)
515 */
516
517extern int ipv6_rcv(struct sk_buff *skb,
518 struct net_device *dev,
f2ccd8fa
DM		 519 struct packet_type *pt,
520 struct net_device *orig_dev);
1da177e4 521
b05e1066
PM		 522extern int ip6_rcv_finish(struct sk_buff *skb);
523
1da177e4
LT		 524/*
525 * upper-layer output functions
526 */
527extern int ip6_xmit(struct sock *sk,
528 struct sk_buff *skb,
4c9483b2 529 struct flowi6 *fl6,
b903d324
ED		 530 struct ipv6_txoptions *opt,
531 int tclass);
1da177e4
LT		 532
533extern int ip6_nd_hdr(struct sock *sk,
534 struct sk_buff *skb,
535 struct net_device *dev,
9acd9f3a
YH		 536 const struct in6_addr *saddr,
537 const struct in6_addr *daddr,
1da177e4
LT		 538 int proto, int len);
539
540extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
541
542extern int ip6_append_data(struct sock *sk,
543 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
544 void *from,
545 int length,
546 int transhdrlen,
547 int hlimit,
41a1f8ea 548 int tclass,
1da177e4 549 struct ipv6_txoptions *opt,
4c9483b2 550 struct flowi6 *fl6,
1da177e4 551 struct rt6_info *rt,
13b52cd4
BH		 552 unsigned int flags,
553 int dontfrag);
1da177e4
LT		 554
555extern int ip6_push_pending_frames(struct sock *sk);
556
557extern void ip6_flush_pending_frames(struct sock *sk);
558
559extern int ip6_dst_lookup(struct sock *sk,
560 struct dst_entry **dst,
4c9483b2 561 struct flowi6 *fl6);
68d0c6d3 562extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
4c9483b2 563 struct flowi6 *fl6,
68d0c6d3 564 const struct in6_addr *final_dst,
a1414715 565 bool can_sleep);
68d0c6d3 566extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
4c9483b2 567 struct flowi6 *fl6,
68d0c6d3 568 const struct in6_addr *final_dst,
a1414715 569 bool can_sleep);
2774c131
DM		 570extern struct dst_entry * ip6_blackhole_route(struct net *net,
571 struct dst_entry *orig_dst);
1da177e4
LT		 572
573/*
574 * skb processing functions
575 */
576
577extern int ip6_output(struct sk_buff *skb);
578extern int ip6_forward(struct sk_buff *skb);
579extern int ip6_input(struct sk_buff *skb);
580extern int ip6_mc_input(struct sk_buff *skb);
581
ef76bc23
HX		 582extern int __ip6_local_out(struct sk_buff *skb);
583extern int ip6_local_out(struct sk_buff *skb);
584
1da177e4
LT		 585/*
586 * Extension header (options) processing
587 */
588
1da177e4
LT		 589extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
590 struct ipv6_txoptions *opt,
591 u8 *proto,
592 struct in6_addr **daddr_p);
593extern void ipv6_push_frag_opts(struct sk_buff *skb,
594 struct ipv6_txoptions *opt,
595 u8 *proto);
596
597extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
75f2811c 598 u8 *nexthdrp, __be16 *frag_offp);
1da177e4 599
a50feda5 600extern bool ipv6_ext_hdr(u8 nexthdr);
1da177e4 601
c61a4043
MN		 602extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
603
4c9483b2 604extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
20c59de2
AE		 605 const struct ipv6_txoptions *opt,
606 struct in6_addr *orig);
607
1da177e4
LT		 608/*
609 * socket options (ipv6_sockglue.c)
610 */
611
612extern int ipv6_setsockopt(struct sock *sk, int level,
613 int optname,
614 char __user *optval,
b7058842 615 unsigned int optlen);
1da177e4
LT		 616extern int ipv6_getsockopt(struct sock *sk, int level,
617 int optname,
618 char __user *optval,
619 int __user *optlen);
3fdadf7d
DM		 620extern int compat_ipv6_setsockopt(struct sock *sk,
621 int level,
622 int optname,
623 char __user *optval,
b7058842 624 unsigned int optlen);
3fdadf7d
DM		 625extern int compat_ipv6_getsockopt(struct sock *sk,
626 int level,
627 int optname,
628 char __user *optval,
629 int __user *optlen);
1da177e4 630
1da177e4
LT		 631extern int ip6_datagram_connect(struct sock *sk,
632 struct sockaddr *addr, int addr_len);
633
634extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
4b340ae2 635extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
e69a4adc 636extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
1da177e4 637 u32 info, u8 *payload);
4c9483b2
DM		 638extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
639extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
1da177e4
LT		 640
641extern int inet6_release(struct socket *sock);
642extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
643 int addr_len);
644extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
645 int *uaddr_len, int peer);
646extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
647 unsigned long arg);
648
d8313f5c
ACM		 649extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
650 struct sock *sk);
651
1da177e4
LT		 652/*
653 * reassembly.c
654 */
90ddc4f0
ED		 655extern const struct proto_ops inet6_stream_ops;
656extern const struct proto_ops inet6_dgram_ops;
20380731 657
14c85021
ACM		 658struct group_source_req;
659struct group_filter;
660
20380731
ACM		 661extern int ip6_mc_source(int add, int omode, struct sock *sk,
662 struct group_source_req *pgsr);
663extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
664extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
665 struct group_filter __user *optval,
666 int __user *optlen);
93c8b90f
IJ		 667extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
668 const struct in6_addr *daddr, u32 rnd);
20380731
ACM		 669
670#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 671extern int ac6_proc_init(struct net *net);
672extern void ac6_proc_exit(struct net *net);
20380731
ACM		 673extern int raw6_proc_init(void);
674extern void raw6_proc_exit(void);
6f8b13bc
DL		 675extern int tcp6_proc_init(struct net *net);
676extern void tcp6_proc_exit(struct net *net);
0c96d8c5
DL		 677extern int udp6_proc_init(struct net *net);
678extern void udp6_proc_exit(struct net *net);
ba4e58ec
GR		 679extern int udplite6_proc_init(void);
680extern void udplite6_proc_exit(void);
20380731
ACM		 681extern int ipv6_misc_proc_init(void);
682extern void ipv6_misc_proc_exit(void);
7f7d9a6b
HX		 683extern int snmp6_register_dev(struct inet6_dev *idev);
684extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 685
7f7d9a6b 686#else
6ab57e7e
DL		 687static inline int ac6_proc_init(struct net *net) { return 0; }
688static inline void ac6_proc_exit(struct net *net) { }
689static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
690static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731 691#endif
1da177e4 692
20380731 693#ifdef CONFIG_SYSCTL
760f2d01
DL		 694extern ctl_table ipv6_route_table_template[];
695extern ctl_table ipv6_icmp_table_template[];
1da177e4 696
6de1a910
DL		 697extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
698extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
291480c0 699extern int ipv6_sysctl_register(void);
20380731
ACM		 700extern void ipv6_sysctl_unregister(void);
701#endif
1da177e4 702
20380731 703#endif /* _NET_IPV6_H */
Linux kernel - Deliverables
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