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inet: constify ip headers and in6_addr
[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 */
80#ifdef __KERNEL__
81#define IPV6_ADDR_MC_SCOPE(a) \
82 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
83#define __IPV6_ADDR_SCOPE_INVALID -1
84#endif
85#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
86#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
87#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
88#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
89#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
90
5ced1339
LL		 91/*
92 * Addr flags
93 */
94#ifdef __KERNEL__
95#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
96 ((a)->s6_addr[1] & 0x10)
97#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
98 ((a)->s6_addr[1] & 0x20)
99#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
100 ((a)->s6_addr[1] & 0x40)
101#endif
102
1da177e4
LT		 103/*
104 * fragmentation header
105 */
106
107struct frag_hdr {
44473a6b
AV		 108 __u8 nexthdr;
109 __u8 reserved;
110 __be16 frag_off;
111 __be32 identification;
1da177e4
LT		 112};
113
114#define IP6_MF 0x0001
115
116#ifdef __KERNEL__
117
118#include <net/sock.h>
119
120/* sysctls */
1da177e4 121extern int sysctl_mld_max_msf;
3d7cc2ba
PE		 122extern struct ctl_path net_ipv6_ctl_path[];
123
087fe240 124#define _DEVINC(net, statname, modifier, idev, field) \
14878f75 125({ \
a11d206d
YH		 126 struct inet6_dev *_idev = (idev); \
127 if (likely(_idev != NULL)) \
14878f75 128 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
9261e537 129 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
a11d206d 130})
14878f75 131
087fe240 132#define _DEVADD(net, statname, modifier, idev, field, val) \
8e7999c4
PE		 133({ \
134 struct inet6_dev *_idev = (idev); \
135 if (likely(_idev != NULL)) \
136 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
9261e537 137 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
8e7999c4
PE		 138})
139
edf391ff
NH		 140#define _DEVUPD(net, statname, modifier, idev, field, val) \
141({ \
142 struct inet6_dev *_idev = (idev); \
143 if (likely(_idev != NULL)) \
144 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
145 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
146})
147
14878f75 148/* MIBs */
14878f75 149
087fe240 150#define IP6_INC_STATS(net, idev,field) \
4ce3c183 151 _DEVINC(net, ipv6, 64, idev, field)
087fe240 152#define IP6_INC_STATS_BH(net, idev,field) \
4ce3c183 153 _DEVINC(net, ipv6, 64_BH, idev, field)
edf391ff 154#define IP6_ADD_STATS(net, idev,field,val) \
4ce3c183 155 _DEVADD(net, ipv6, 64, idev, field, val)
087fe240 156#define IP6_ADD_STATS_BH(net, idev,field,val) \
4ce3c183 157 _DEVADD(net, ipv6, 64_BH, idev, field, val)
edf391ff 158#define IP6_UPD_PO_STATS(net, idev,field,val) \
4ce3c183 159 _DEVUPD(net, ipv6, 64, idev, field, val)
edf391ff 160#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
4ce3c183 161 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
087fe240
DL		 162#define ICMP6_INC_STATS(net, idev, field) \
163 _DEVINC(net, icmpv6, , idev, field)
164#define ICMP6_INC_STATS_BH(net, idev, field) \
165 _DEVINC(net, icmpv6, _BH, idev, field)
166
167#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
168 _DEVINC(net, icmpv6msg, , idev, field +256)
169#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
170 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
171#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
172 _DEVINC(net, icmpv6msg, _BH, idev, field)
14878f75 173
fd2c3ef7 174struct ip6_ra_chain {
1da177e4
LT		 175 struct ip6_ra_chain *next;
176 struct sock *sk;
177 int sel;
178 void (*destructor)(struct sock *);
179};
180
181extern struct ip6_ra_chain *ip6_ra_chain;
182extern rwlock_t ip6_ra_lock;
183
184/*
185 This structure is prepared by protocol, when parsing
186 ancillary data and passed to IPv6.
187 */
188
fd2c3ef7 189struct ipv6_txoptions {
1da177e4
LT		 190 /* Length of this structure */
191 int tot_len;
192
193 /* length of extension headers */
194
195 __u16 opt_flen; /* after fragment hdr */
196 __u16 opt_nflen; /* before fragment hdr */
197
198 struct ipv6_opt_hdr *hopopt;
199 struct ipv6_opt_hdr *dst0opt;
200 struct ipv6_rt_hdr *srcrt; /* Routing Header */
1da177e4
LT		 201 struct ipv6_opt_hdr *dst1opt;
202
203 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
204};
205
fd2c3ef7 206struct ip6_flowlabel {
1da177e4 207 struct ip6_flowlabel *next;
90bcaf7b 208 __be32 label;
db3459d1 209 atomic_t users;
1da177e4
LT		 210 struct in6_addr dst;
211 struct ipv6_txoptions *opt;
1da177e4
LT		 212 unsigned long linger;
213 u8 share;
214 u32 owner;
215 unsigned long lastuse;
216 unsigned long expires;
60e8fbc4 217 struct net *fl_net;
1da177e4
LT		 218};
219
f3a7c66b
HH		 220#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
221#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
1da177e4 222
fd2c3ef7 223struct ipv6_fl_socklist {
1da177e4
LT		 224 struct ipv6_fl_socklist *next;
225 struct ip6_flowlabel *fl;
226};
227
90bcaf7b 228extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
1da177e4
LT		 229extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
230 struct ip6_flowlabel * fl,
231 struct ipv6_txoptions * fopt);
232extern void fl6_free_socklist(struct sock *sk);
233extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
0a3e78ac 234extern int ip6_flowlabel_init(void);
1da177e4
LT		 235extern void ip6_flowlabel_cleanup(void);
236
237static inline void fl6_sock_release(struct ip6_flowlabel *fl)
238{
239 if (fl)
240 atomic_dec(&fl->users);
241}
242
725a8ff0 243extern int ip6_ra_control(struct sock *sk, int sel);
1da177e4 244
e5bbef20 245extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 246
247extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 248extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
249 int newtype,
250 struct ipv6_opt_hdr __user *newopt,
251 int newoptlen);
df9890c3
YH		 252struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
253 struct ipv6_txoptions *opt);
1da177e4 254
399c07de
ACM		 255extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
256
e5a2bb84 257int ip6_frag_nqueues(struct net *net);
6ddc0822 258int ip6_frag_mem(struct net *net);
1da177e4 259
9874c41c
JP		 260#define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
261#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
262#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
1da177e4 263
b1cacb68
YH		 264extern int __ipv6_addr_type(const struct in6_addr *addr);
265static inline int ipv6_addr_type(const struct in6_addr *addr)
266{
267 return __ipv6_addr_type(addr) & 0xffff;
268}
1da177e4
LT		 269
270static inline int ipv6_addr_scope(const struct in6_addr *addr)
271{
b1cacb68
YH		 272 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
273}
274
275static inline int __ipv6_addr_src_scope(int type)
276{
a02cec21 277 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
b1cacb68
YH		 278}
279
280static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
281{
282 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 283}
284
285static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
286{
db3459d1 287 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 288}
289
f2ffd9ee
PM		 290static inline int
291ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
292 const struct in6_addr *a2)
293{
a02cec21
ED		 294 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
295 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
296 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
297 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
f2ffd9ee
PM		 298}
299
1da177e4
LT		 300static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
301{
db3459d1 302 memcpy(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 303}
304
305static inline void ipv6_addr_prefix(struct in6_addr *pfx,
306 const struct in6_addr *addr,
307 int plen)
308{
309 /* caller must guarantee 0 <= plen <= 128 */
310 int o = plen >> 3,
311 b = plen & 0x7;
312
db3459d1 313 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 314 memcpy(pfx->s6_addr, addr, o);
db3459d1 315 if (b != 0)
1da177e4 316 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 317}
318
1da177e4 319static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 320 __be32 w1, __be32 w2,
321 __be32 w3, __be32 w4)
1da177e4
LT		 322{
323 addr->s6_addr32[0] = w1;
324 addr->s6_addr32[1] = w2;
325 addr->s6_addr32[2] = w3;
326 addr->s6_addr32[3] = w4;
327}
1da177e4
LT		 328
329static inline int ipv6_addr_equal(const struct in6_addr *a1,
330 const struct in6_addr *a2)
331{
a02cec21
ED		 332 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
333 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
334 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
335 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
1da177e4
LT		 336}
337
48818f82 338static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
1da177e4
LT		 339 unsigned int prefixlen)
340{
341 unsigned pdw, pbi;
342
343 /* check complete u32 in prefix */
344 pdw = prefixlen >> 5;
345 if (pdw && memcmp(a1, a2, pdw << 2))
346 return 0;
347
348 /* check incomplete u32 in prefix */
349 pbi = prefixlen & 0x1f;
350 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
351 return 0;
352
353 return 1;
354}
355
356static inline int ipv6_prefix_equal(const struct in6_addr *a1,
357 const struct in6_addr *a2,
358 unsigned int prefixlen)
359{
360 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
361 prefixlen);
362}
363
2588fe1d 364struct inet_frag_queue;
2588fe1d 365
0b5ccb2e
PM		 366enum ip6_defrag_users {
367 IP6_DEFRAG_LOCAL_DELIVER,
368 IP6_DEFRAG_CONNTRACK_IN,
4be929be 369 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
0b5ccb2e 370 IP6_DEFRAG_CONNTRACK_OUT,
4be929be 371 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 372 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 373 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
0b5ccb2e
PM		 374};
375
c6fda282
PE		 376struct ip6_create_arg {
377 __be32 id;
0b5ccb2e 378 u32 user;
b71d1d42
ED		 379 const struct in6_addr *src;
380 const struct in6_addr *dst;
c6fda282
PE		 381};
382
383void ip6_frag_init(struct inet_frag_queue *q, void *a);
abd6523d 384int ip6_frag_match(struct inet_frag_queue *q, void *a);
c6fda282 385
1da177e4
LT		 386static inline int ipv6_addr_any(const struct in6_addr *a)
387{
a02cec21
ED		 388 return (a->s6_addr32[0] | a->s6_addr32[1] |
389 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
1da177e4
LT		 390}
391
f630e43a
YH		 392static inline int ipv6_addr_loopback(const struct in6_addr *a)
393{
a02cec21
ED		 394 return (a->s6_addr32[0] | a->s6_addr32[1] |
395 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
f630e43a
YH		 396}
397
e773e4fa
BH		 398static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
399{
a02cec21
ED		 400 return (a->s6_addr32[0] | a->s6_addr32[1] |
401 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
e773e4fa
BH		 402}
403
99cd07a5
JMT		 404/*
405 * Check for a RFC 4843 ORCHID address
406 * (Overlay Routable Cryptographic Hash Identifiers)
407 */
408static inline int ipv6_addr_orchid(const struct in6_addr *a)
409{
a02cec21 410 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
99cd07a5
JMT		 411}
412
f15364bd
AC		 413static inline void ipv6_addr_set_v4mapped(const __be32 addr,
414 struct in6_addr *v4mapped)
415{
416 ipv6_addr_set(v4mapped,
417 0, 0,
418 htonl(0x0000FFFF),
419 addr);
420}
421
971f359d
YH		 422/*
423 * find the first different bit between two addresses
424 * length of address must be a multiple of 32bits
425 */
426static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
427{
ef296f56 428 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 429 int i;
430
431 addrlen >>= 2;
432
433 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 434 __be32 xb = a1[i] ^ a2[i];
435 if (xb)
d57b8fb8 436 return i * 32 + 31 - __fls(ntohl(xb));
971f359d
YH		 437 }
438
439 /*
440 * we should *never* get to this point since that
441 * would mean the addrs are equal
442 *
443 * However, we do get to it 8) And exacly, when
444 * addresses are equal 8)
445 *
446 * ip route add 1111::/128 via ...
447 * ip route add 1111::/64 via ...
448 * and we are here.
449 *
450 * Ideally, this function should stop comparison
451 * at prefix length. It does not, but it is still OK,
452 * if returned value is greater than prefix length.
453 * --ANK (980803)
454 */
a02cec21 455 return addrlen << 5;
971f359d
YH		 456}
457
458static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
459{
460 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
461}
462
7ea2f2c5
SS		 463static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
464{
465 static u32 ipv6_fragmentation_id = 1;
466 static DEFINE_SPINLOCK(ip6_id_lock);
467
468 spin_lock_bh(&ip6_id_lock);
469 fhdr->identification = htonl(ipv6_fragmentation_id);
470 if (++ipv6_fragmentation_id == 0)
471 ipv6_fragmentation_id = 1;
472 spin_unlock_bh(&ip6_id_lock);
473}
474
1da177e4
LT		 475/*
476 * Prototypes exported by ipv6
477 */
478
479/*
480 * rcv function (called from netdevice level)
481 */
482
483extern int ipv6_rcv(struct sk_buff *skb,
484 struct net_device *dev,
f2ccd8fa
DM		 485 struct packet_type *pt,
486 struct net_device *orig_dev);
1da177e4 487
b05e1066
PM		 488extern int ip6_rcv_finish(struct sk_buff *skb);
489
1da177e4
LT		 490/*
491 * upper-layer output functions
492 */
493extern int ip6_xmit(struct sock *sk,
494 struct sk_buff *skb,
4c9483b2 495 struct flowi6 *fl6,
4e15ed4d 496 struct ipv6_txoptions *opt);
1da177e4
LT		 497
498extern int ip6_nd_hdr(struct sock *sk,
499 struct sk_buff *skb,
500 struct net_device *dev,
9acd9f3a
YH		 501 const struct in6_addr *saddr,
502 const struct in6_addr *daddr,
1da177e4
LT		 503 int proto, int len);
504
505extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
506
507extern int ip6_append_data(struct sock *sk,
508 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
509 void *from,
510 int length,
511 int transhdrlen,
512 int hlimit,
41a1f8ea 513 int tclass,
1da177e4 514 struct ipv6_txoptions *opt,
4c9483b2 515 struct flowi6 *fl6,
1da177e4 516 struct rt6_info *rt,
13b52cd4
BH		 517 unsigned int flags,
518 int dontfrag);
1da177e4
LT		 519
520extern int ip6_push_pending_frames(struct sock *sk);
521
522extern void ip6_flush_pending_frames(struct sock *sk);
523
524extern int ip6_dst_lookup(struct sock *sk,
525 struct dst_entry **dst,
4c9483b2 526 struct flowi6 *fl6);
68d0c6d3 527extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
4c9483b2 528 struct flowi6 *fl6,
68d0c6d3 529 const struct in6_addr *final_dst,
a1414715 530 bool can_sleep);
68d0c6d3 531extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
4c9483b2 532 struct flowi6 *fl6,
68d0c6d3 533 const struct in6_addr *final_dst,
a1414715 534 bool can_sleep);
2774c131
DM		 535extern struct dst_entry * ip6_blackhole_route(struct net *net,
536 struct dst_entry *orig_dst);
1da177e4
LT		 537
538/*
539 * skb processing functions
540 */
541
542extern int ip6_output(struct sk_buff *skb);
543extern int ip6_forward(struct sk_buff *skb);
544extern int ip6_input(struct sk_buff *skb);
545extern int ip6_mc_input(struct sk_buff *skb);
546
ef76bc23
HX		 547extern int __ip6_local_out(struct sk_buff *skb);
548extern int ip6_local_out(struct sk_buff *skb);
549
1da177e4
LT		 550/*
551 * Extension header (options) processing
552 */
553
1da177e4
LT		 554extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
555 struct ipv6_txoptions *opt,
556 u8 *proto,
557 struct in6_addr **daddr_p);
558extern void ipv6_push_frag_opts(struct sk_buff *skb,
559 struct ipv6_txoptions *opt,
560 u8 *proto);
561
562extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
0d3d077c 563 u8 *nexthdrp);
1da177e4
LT		 564
565extern int ipv6_ext_hdr(u8 nexthdr);
566
c61a4043
MN		 567extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
568
4c9483b2 569extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
20c59de2
AE		 570 const struct ipv6_txoptions *opt,
571 struct in6_addr *orig);
572
1da177e4
LT		 573/*
574 * socket options (ipv6_sockglue.c)
575 */
576
577extern int ipv6_setsockopt(struct sock *sk, int level,
578 int optname,
579 char __user *optval,
b7058842 580 unsigned int optlen);
1da177e4
LT		 581extern int ipv6_getsockopt(struct sock *sk, int level,
582 int optname,
583 char __user *optval,
584 int __user *optlen);
3fdadf7d
DM		 585extern int compat_ipv6_setsockopt(struct sock *sk,
586 int level,
587 int optname,
588 char __user *optval,
b7058842 589 unsigned int optlen);
3fdadf7d
DM		 590extern int compat_ipv6_getsockopt(struct sock *sk,
591 int level,
592 int optname,
593 char __user *optval,
594 int __user *optlen);
1da177e4 595
1da177e4
LT		 596extern int ip6_datagram_connect(struct sock *sk,
597 struct sockaddr *addr, int addr_len);
598
599extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
4b340ae2 600extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
e69a4adc 601extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
1da177e4 602 u32 info, u8 *payload);
4c9483b2
DM		 603extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
604extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
1da177e4
LT		 605
606extern int inet6_release(struct socket *sock);
607extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
608 int addr_len);
609extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
610 int *uaddr_len, int peer);
611extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
612 unsigned long arg);
613
d8313f5c
ACM		 614extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
615 struct sock *sk);
616
1da177e4
LT		 617/*
618 * reassembly.c
619 */
90ddc4f0
ED		 620extern const struct proto_ops inet6_stream_ops;
621extern const struct proto_ops inet6_dgram_ops;
20380731 622
14c85021
ACM		 623struct group_source_req;
624struct group_filter;
625
20380731
ACM		 626extern int ip6_mc_source(int add, int omode, struct sock *sk,
627 struct group_source_req *pgsr);
628extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
629extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
630 struct group_filter __user *optval,
631 int __user *optlen);
93c8b90f
IJ		 632extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
633 const struct in6_addr *daddr, u32 rnd);
20380731
ACM		 634
635#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 636extern int ac6_proc_init(struct net *net);
637extern void ac6_proc_exit(struct net *net);
20380731
ACM		 638extern int raw6_proc_init(void);
639extern void raw6_proc_exit(void);
6f8b13bc
DL		 640extern int tcp6_proc_init(struct net *net);
641extern void tcp6_proc_exit(struct net *net);
0c96d8c5
DL		 642extern int udp6_proc_init(struct net *net);
643extern void udp6_proc_exit(struct net *net);
ba4e58ec
GR		 644extern int udplite6_proc_init(void);
645extern void udplite6_proc_exit(void);
20380731
ACM		 646extern int ipv6_misc_proc_init(void);
647extern void ipv6_misc_proc_exit(void);
7f7d9a6b
HX		 648extern int snmp6_register_dev(struct inet6_dev *idev);
649extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 650
7f7d9a6b 651#else
6ab57e7e
DL		 652static inline int ac6_proc_init(struct net *net) { return 0; }
653static inline void ac6_proc_exit(struct net *net) { }
654static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
655static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731 656#endif
1da177e4 657
20380731 658#ifdef CONFIG_SYSCTL
760f2d01
DL		 659extern ctl_table ipv6_route_table_template[];
660extern ctl_table ipv6_icmp_table_template[];
1da177e4 661
6de1a910
DL		 662extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
663extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
291480c0 664extern int ipv6_sysctl_register(void);
20380731 665extern void ipv6_sysctl_unregister(void);
eeb61f71
AV		 666extern int ipv6_static_sysctl_register(void);
667extern void ipv6_static_sysctl_unregister(void);
20380731 668#endif
1da177e4 669
20380731
ACM		 670#endif /* __KERNEL__ */
671#endif /* _NET_IPV6_H */
Linux kernel - Deliverables
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