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