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qlcnic: Bump up the version to 5.1.35
[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 224 unsigned long linger;
d3aedd5e 225 struct rcu_head rcu;
1da177e4 226 u8 share;
4f82f457
EB		 227 union {
228 struct pid *pid;
229 kuid_t uid;
230 } owner;
1da177e4
LT		 231 unsigned long lastuse;
232 unsigned long expires;
60e8fbc4 233 struct net *fl_net;
1da177e4
LT		 234};
235
f3a7c66b
HH		 236#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
237#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
1da177e4 238
fd2c3ef7 239struct ipv6_fl_socklist {
1da177e4
LT		 240 struct ipv6_fl_socklist *next;
241 struct ip6_flowlabel *fl;
18367681 242 struct rcu_head rcu;
1da177e4
LT		 243};
244
90bcaf7b 245extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
1da177e4
LT		 246extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
247 struct ip6_flowlabel * fl,
248 struct ipv6_txoptions * fopt);
249extern void fl6_free_socklist(struct sock *sk);
250extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
0a3e78ac 251extern int ip6_flowlabel_init(void);
1da177e4
LT		 252extern void ip6_flowlabel_cleanup(void);
253
254static inline void fl6_sock_release(struct ip6_flowlabel *fl)
255{
256 if (fl)
257 atomic_dec(&fl->users);
258}
259
b94f1c09
DM		 260extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
261
725a8ff0 262extern int ip6_ra_control(struct sock *sk, int sel);
1da177e4 263
e5bbef20 264extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 265
266extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 267extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
268 int newtype,
269 struct ipv6_opt_hdr __user *newopt,
270 int newoptlen);
df9890c3
YH		 271struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
272 struct ipv6_txoptions *opt);
1da177e4 273
92113bfd 274extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
399c07de 275
aeaf6e9d
SL		 276static inline bool ipv6_accept_ra(struct inet6_dev *idev)
277{
278 /* If forwarding is enabled, RA are not accepted unless the special
279 * hybrid mode (accept_ra=2) is enabled.
280 */
281 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
282 idev->cnf.accept_ra;
283}
284
d4915c08
AW		 285#if IS_ENABLED(CONFIG_IPV6)
286static inline int ip6_frag_nqueues(struct net *net)
287{
288 return net->ipv6.frags.nqueues;
289}
290
291static inline int ip6_frag_mem(struct net *net)
292{
d433673e 293 return sum_frag_mem_limit(&net->ipv6.frags);
d4915c08
AW		 294}
295#endif
1da177e4 296
c2a93660
JDB		 297#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
298#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
9874c41c 299#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
1da177e4 300
b1cacb68
YH		 301extern int __ipv6_addr_type(const struct in6_addr *addr);
302static inline int ipv6_addr_type(const struct in6_addr *addr)
303{
304 return __ipv6_addr_type(addr) & 0xffff;
305}
1da177e4
LT		 306
307static inline int ipv6_addr_scope(const struct in6_addr *addr)
308{
b1cacb68
YH		 309 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
310}
311
312static inline int __ipv6_addr_src_scope(int type)
313{
a02cec21 314 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
b1cacb68
YH		 315}
316
317static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
318{
319 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 320}
321
322static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
323{
db3459d1 324 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 325}
326
1a203cb3 327static inline bool
f2ffd9ee
PM		 328ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
329 const struct in6_addr *a2)
330{
1a203cb3
ED		 331#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
332 const unsigned long *ul1 = (const unsigned long *)a1;
333 const unsigned long *ulm = (const unsigned long *)m;
334 const unsigned long *ul2 = (const unsigned long *)a2;
335
336 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
337 ((ul1[1] ^ ul2[1]) & ulm[1]));
338#else
a02cec21
ED		 339 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
340 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
341 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
342 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
1a203cb3 343#endif
f2ffd9ee
PM		 344}
345
1da177e4
LT		 346static inline void ipv6_addr_prefix(struct in6_addr *pfx,
347 const struct in6_addr *addr,
348 int plen)
349{
350 /* caller must guarantee 0 <= plen <= 128 */
351 int o = plen >> 3,
352 b = plen & 0x7;
353
db3459d1 354 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 355 memcpy(pfx->s6_addr, addr, o);
db3459d1 356 if (b != 0)
1da177e4 357 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 358}
359
5206c579
YH		 360static inline void __ipv6_addr_set_half(__be32 *addr,
361 __be32 wh, __be32 wl)
362{
363#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
364#if defined(__BIG_ENDIAN)
365 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
366 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
367 return;
368 }
369#elif defined(__LITTLE_ENDIAN)
370 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
371 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
372 return;
373 }
374#endif
375#endif
376 addr[0] = wh;
377 addr[1] = wl;
378}
379
1da177e4 380static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 381 __be32 w1, __be32 w2,
382 __be32 w3, __be32 w4)
1da177e4 383{
5206c579
YH		 384 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
385 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
1da177e4 386}
1da177e4 387
92113bfd
ED		 388static inline bool ipv6_addr_equal(const struct in6_addr *a1,
389 const struct in6_addr *a2)
1da177e4 390{
1a203cb3
ED		 391#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
392 const unsigned long *ul1 = (const unsigned long *)a1;
393 const unsigned long *ul2 = (const unsigned long *)a2;
394
395 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
396#else
a02cec21
ED		 397 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
398 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
399 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
400 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
1a203cb3 401#endif
1da177e4
LT		 402}
403
38675170
YH		 404#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
405static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
406 const __be64 *a2,
407 unsigned int len)
408{
512613d7 409 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
38675170
YH		 410 return false;
411 return true;
412}
413
414static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
415 const struct in6_addr *addr2,
416 unsigned int prefixlen)
417{
418 const __be64 *a1 = (const __be64 *)addr1;
419 const __be64 *a2 = (const __be64 *)addr2;
420
421 if (prefixlen >= 64) {
422 if (a1[0] ^ a2[0])
423 return false;
424 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
425 }
426 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
427}
428#else
2ef97332
YH		 429static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
430 const struct in6_addr *addr2,
431 unsigned int prefixlen)
1da177e4 432{
2ef97332
YH		 433 const __be32 *a1 = addr1->s6_addr32;
434 const __be32 *a2 = addr2->s6_addr32;
95c96174 435 unsigned int pdw, pbi;
1da177e4
LT		 436
437 /* check complete u32 in prefix */
438 pdw = prefixlen >> 5;
439 if (pdw && memcmp(a1, a2, pdw << 2))
92113bfd 440 return false;
1da177e4
LT		 441
442 /* check incomplete u32 in prefix */
443 pbi = prefixlen & 0x1f;
444 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
92113bfd 445 return false;
1da177e4 446
92113bfd 447 return true;
1da177e4 448}
38675170 449#endif
1da177e4 450
2588fe1d 451struct inet_frag_queue;
2588fe1d 452
0b5ccb2e
PM		 453enum ip6_defrag_users {
454 IP6_DEFRAG_LOCAL_DELIVER,
455 IP6_DEFRAG_CONNTRACK_IN,
4be929be 456 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
0b5ccb2e 457 IP6_DEFRAG_CONNTRACK_OUT,
4be929be 458 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 459 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 460 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
0b5ccb2e
PM		 461};
462
c6fda282
PE		 463struct ip6_create_arg {
464 __be32 id;
0b5ccb2e 465 u32 user;
b71d1d42
ED		 466 const struct in6_addr *src;
467 const struct in6_addr *dst;
c6fda282
PE		 468};
469
470void ip6_frag_init(struct inet_frag_queue *q, void *a);
cbc264ca 471bool ip6_frag_match(struct inet_frag_queue *q, void *a);
c6fda282 472
b836c99f
AW		 473/*
474 * Equivalent of ipv4 struct ip
475 */
476struct frag_queue {
477 struct inet_frag_queue q;
478
479 __be32 id; /* fragment id */
480 u32 user;
481 struct in6_addr saddr;
482 struct in6_addr daddr;
483
484 int iif;
485 unsigned int csum;
486 __u16 nhoffset;
487};
488
489void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
490 struct inet_frags *frags);
491
92113bfd 492static inline bool ipv6_addr_any(const struct in6_addr *a)
1da177e4 493{
1a203cb3
ED		 494#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
495 const unsigned long *ul = (const unsigned long *)a;
496
497 return (ul[0] | ul[1]) == 0UL;
498#else
a02cec21
ED		 499 return (a->s6_addr32[0] | a->s6_addr32[1] |
500 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
1a203cb3 501#endif
1da177e4
LT		 502}
503
ddbe5032
ED		 504static inline u32 ipv6_addr_hash(const struct in6_addr *a)
505{
506#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
507 const unsigned long *ul = (const unsigned long *)a;
508 unsigned long x = ul[0] ^ ul[1];
509
510 return (u32)(x ^ (x >> 32));
511#else
512 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
513 a->s6_addr32[2] ^ a->s6_addr32[3]);
514#endif
515}
516
92113bfd 517static inline bool ipv6_addr_loopback(const struct in6_addr *a)
f630e43a 518{
e287656b
YH		 519#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
520 const unsigned long *ul = (const unsigned long *)a;
521
522 return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
523#else
a02cec21
ED		 524 return (a->s6_addr32[0] | a->s6_addr32[1] |
525 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
e287656b 526#endif
f630e43a
YH		 527}
528
92113bfd 529static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
e773e4fa 530{
a04d40b8
YH		 531 return (
532#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
533 *(__be64 *)a |
534#else
535 (a->s6_addr32[0] | a->s6_addr32[1]) |
536#endif
537 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
e773e4fa
BH		 538}
539
99cd07a5
JMT		 540/*
541 * Check for a RFC 4843 ORCHID address
542 * (Overlay Routable Cryptographic Hash Identifiers)
543 */
92113bfd 544static inline bool ipv6_addr_orchid(const struct in6_addr *a)
99cd07a5 545{
a02cec21 546 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
99cd07a5
JMT		 547}
548
f15364bd
AC		 549static inline void ipv6_addr_set_v4mapped(const __be32 addr,
550 struct in6_addr *v4mapped)
551{
552 ipv6_addr_set(v4mapped,
553 0, 0,
554 htonl(0x0000FFFF),
555 addr);
556}
557
971f359d
YH		 558/*
559 * find the first different bit between two addresses
560 * length of address must be a multiple of 32bits
561 */
9f2e7334 562static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
971f359d 563{
ef296f56 564 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 565 int i;
566
567 addrlen >>= 2;
568
569 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 570 __be32 xb = a1[i] ^ a2[i];
571 if (xb)
d57b8fb8 572 return i * 32 + 31 - __fls(ntohl(xb));
971f359d
YH		 573 }
574
575 /*
576 * we should *never* get to this point since that
577 * would mean the addrs are equal
578 *
579 * However, we do get to it 8) And exacly, when
580 * addresses are equal 8)
581 *
582 * ip route add 1111::/128 via ...
583 * ip route add 1111::/64 via ...
584 * and we are here.
585 *
586 * Ideally, this function should stop comparison
587 * at prefix length. It does not, but it is still OK,
588 * if returned value is greater than prefix length.
589 * --ANK (980803)
590 */
a02cec21 591 return addrlen << 5;
971f359d
YH		 592}
593
9f2e7334
YH		 594#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
595static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
596{
597 const __be64 *a1 = token1, *a2 = token2;
598 int i;
599
600 addrlen >>= 3;
601
602 for (i = 0; i < addrlen; i++) {
603 __be64 xb = a1[i] ^ a2[i];
604 if (xb)
605 return i * 64 + 63 - __fls(be64_to_cpu(xb));
606 }
607
608 return addrlen << 6;
609}
610#endif
611
612static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
613{
614#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
615 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
616 return __ipv6_addr_diff64(token1, token2, addrlen);
617#endif
618 return __ipv6_addr_diff32(token1, token2, addrlen);
619}
620
971f359d
YH		 621static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
622{
623 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
624}
625
87c48fa3 626extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
7ea2f2c5 627
3e4e4c1f
YH		 628/*
629 * Header manipulation
630 */
631static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
632 __be32 flowlabel)
633{
07f623d3 634 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
3e4e4c1f
YH		 635}
636
6502ca52
YH		 637static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
638{
639 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
640}
641
1da177e4
LT		 642/*
643 * Prototypes exported by ipv6
644 */
645
646/*
647 * rcv function (called from netdevice level)
648 */
649
650extern int ipv6_rcv(struct sk_buff *skb,
651 struct net_device *dev,
f2ccd8fa
DM		 652 struct packet_type *pt,
653 struct net_device *orig_dev);
1da177e4 654
b05e1066
PM		 655extern int ip6_rcv_finish(struct sk_buff *skb);
656
1da177e4
LT		 657/*
658 * upper-layer output functions
659 */
660extern int ip6_xmit(struct sock *sk,
661 struct sk_buff *skb,
4c9483b2 662 struct flowi6 *fl6,
b903d324
ED		 663 struct ipv6_txoptions *opt,
664 int tclass);
1da177e4 665
1da177e4
LT		 666extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
667
668extern int ip6_append_data(struct sock *sk,
669 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
670 void *from,
671 int length,
672 int transhdrlen,
673 int hlimit,
41a1f8ea 674 int tclass,
1da177e4 675 struct ipv6_txoptions *opt,
4c9483b2 676 struct flowi6 *fl6,
1da177e4 677 struct rt6_info *rt,
13b52cd4
BH		 678 unsigned int flags,
679 int dontfrag);
1da177e4
LT		 680
681extern int ip6_push_pending_frames(struct sock *sk);
682
683extern void ip6_flush_pending_frames(struct sock *sk);
684
685extern int ip6_dst_lookup(struct sock *sk,
686 struct dst_entry **dst,
4c9483b2 687 struct flowi6 *fl6);
68d0c6d3 688extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
4c9483b2 689 struct flowi6 *fl6,
68d0c6d3 690 const struct in6_addr *final_dst,
a1414715 691 bool can_sleep);
68d0c6d3 692extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
4c9483b2 693 struct flowi6 *fl6,
68d0c6d3 694 const struct in6_addr *final_dst,
a1414715 695 bool can_sleep);
2774c131
DM		 696extern struct dst_entry * ip6_blackhole_route(struct net *net,
697 struct dst_entry *orig_dst);
1da177e4
LT		 698
699/*
700 * skb processing functions
701 */
702
703extern int ip6_output(struct sk_buff *skb);
704extern int ip6_forward(struct sk_buff *skb);
705extern int ip6_input(struct sk_buff *skb);
706extern int ip6_mc_input(struct sk_buff *skb);
707
ef76bc23
HX		 708extern int __ip6_local_out(struct sk_buff *skb);
709extern int ip6_local_out(struct sk_buff *skb);
710
1da177e4
LT		 711/*
712 * Extension header (options) processing
713 */
714
1da177e4
LT		 715extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
716 struct ipv6_txoptions *opt,
717 u8 *proto,
718 struct in6_addr **daddr_p);
719extern void ipv6_push_frag_opts(struct sk_buff *skb,
720 struct ipv6_txoptions *opt,
721 u8 *proto);
722
723extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
75f2811c 724 u8 *nexthdrp, __be16 *frag_offp);
1da177e4 725
a50feda5 726extern bool ipv6_ext_hdr(u8 nexthdr);
1da177e4 727
f8f62675 728enum {
9195bb8e
AA		 729 IP6_FH_F_FRAG = (1 << 0),
730 IP6_FH_F_AUTH = (1 << 1),
731 IP6_FH_F_SKIP_RH = (1 << 2),
f8f62675
JG		 732};
733
734/* find specified header and get offset to it */
735extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
736 int target, unsigned short *fragoff, int *fragflg);
737
c61a4043
MN		 738extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
739
4c9483b2 740extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
20c59de2
AE		 741 const struct ipv6_txoptions *opt,
742 struct in6_addr *orig);
743
1da177e4
LT		 744/*
745 * socket options (ipv6_sockglue.c)
746 */
747
748extern int ipv6_setsockopt(struct sock *sk, int level,
749 int optname,
750 char __user *optval,
b7058842 751 unsigned int optlen);
1da177e4
LT		 752extern int ipv6_getsockopt(struct sock *sk, int level,
753 int optname,
754 char __user *optval,
755 int __user *optlen);
3fdadf7d
DM		 756extern int compat_ipv6_setsockopt(struct sock *sk,
757 int level,
758 int optname,
759 char __user *optval,
b7058842 760 unsigned int optlen);
3fdadf7d
DM		 761extern int compat_ipv6_getsockopt(struct sock *sk,
762 int level,
763 int optname,
764 char __user *optval,
765 int __user *optlen);
1da177e4 766
1da177e4
LT		 767extern int ip6_datagram_connect(struct sock *sk,
768 struct sockaddr *addr, int addr_len);
769
770extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
4b340ae2 771extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
e69a4adc 772extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
1da177e4 773 u32 info, u8 *payload);
4c9483b2
DM		 774extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
775extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
1da177e4
LT		 776
777extern int inet6_release(struct socket *sock);
778extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
779 int addr_len);
780extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
781 int *uaddr_len, int peer);
782extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
783 unsigned long arg);
784
d8313f5c
ACM		 785extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
786 struct sock *sk);
787
1da177e4
LT		 788/*
789 * reassembly.c
790 */
90ddc4f0
ED		 791extern const struct proto_ops inet6_stream_ops;
792extern const struct proto_ops inet6_dgram_ops;
20380731 793
14c85021
ACM		 794struct group_source_req;
795struct group_filter;
796
20380731
ACM		 797extern int ip6_mc_source(int add, int omode, struct sock *sk,
798 struct group_source_req *pgsr);
799extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
800extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
801 struct group_filter __user *optval,
802 int __user *optlen);
93c8b90f
IJ		 803extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
804 const struct in6_addr *daddr, u32 rnd);
20380731
ACM		 805
806#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 807extern int ac6_proc_init(struct net *net);
808extern void ac6_proc_exit(struct net *net);
20380731
ACM		 809extern int raw6_proc_init(void);
810extern void raw6_proc_exit(void);
6f8b13bc
DL		 811extern int tcp6_proc_init(struct net *net);
812extern void tcp6_proc_exit(struct net *net);
0c96d8c5
DL		 813extern int udp6_proc_init(struct net *net);
814extern void udp6_proc_exit(struct net *net);
ba4e58ec
GR		 815extern int udplite6_proc_init(void);
816extern void udplite6_proc_exit(void);
20380731
ACM		 817extern int ipv6_misc_proc_init(void);
818extern void ipv6_misc_proc_exit(void);
7f7d9a6b
HX		 819extern int snmp6_register_dev(struct inet6_dev *idev);
820extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 821
7f7d9a6b 822#else
6ab57e7e
DL		 823static inline int ac6_proc_init(struct net *net) { return 0; }
824static inline void ac6_proc_exit(struct net *net) { }
825static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
826static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731 827#endif
1da177e4 828
20380731 829#ifdef CONFIG_SYSCTL
760f2d01
DL		 830extern ctl_table ipv6_route_table_template[];
831extern ctl_table ipv6_icmp_table_template[];
1da177e4 832
6de1a910
DL		 833extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
834extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
291480c0 835extern int ipv6_sysctl_register(void);
20380731
ACM		 836extern void ipv6_sysctl_unregister(void);
837#endif
1da177e4 838
20380731 839#endif /* _NET_IPV6_H */
Linux kernel - Deliverables
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