projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'v3.10.108' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
08dcdbf6 18#include <linux/jhash.h>
20283d84 19#include <net/if_inet6.h>
1da177e4
LT		 20#include <net/ndisc.h>
21#include <net/flow.h>
22#include <net/snmp.h>
23
24#define SIN6_LEN_RFC2133 24
25
26#define IPV6_MAXPLEN 65535
27
28/*
29 * NextHeader field of IPv6 header
30 */
31
32#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
33#define NEXTHDR_TCP 6 /* TCP segment. */
34#define NEXTHDR_UDP 17 /* UDP message. */
35#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
36#define NEXTHDR_ROUTING 43 /* Routing header. */
37#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
c12b395a 38#define NEXTHDR_GRE 47 /* GRE header. */
1da177e4
LT		 39#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
40#define NEXTHDR_AUTH 51 /* Authentication header. */
41#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
42#define NEXTHDR_NONE 59 /* No next header */
43#define NEXTHDR_DEST 60 /* Destination options header. */
2b741653 44#define NEXTHDR_MOBILITY 135 /* Mobility header. */
1da177e4
LT		 45
46#define NEXTHDR_MAX 255
47
48
49
50#define IPV6_DEFAULT_HOPLIMIT 64
51#define IPV6_DEFAULT_MCASTHOPS 1
52
53/*
54 * Addr type
55 *
56 * type - unicast | multicast
57 * scope - local | site | global
58 * v4 - compat
59 * v4mapped
60 * any
61 * loopback
62 */
63
64#define IPV6_ADDR_ANY 0x0000U
65
66#define IPV6_ADDR_UNICAST 0x0001U
67#define IPV6_ADDR_MULTICAST 0x0002U
68
69#define IPV6_ADDR_LOOPBACK 0x0010U
70#define IPV6_ADDR_LINKLOCAL 0x0020U
71#define IPV6_ADDR_SITELOCAL 0x0040U
72
73#define IPV6_ADDR_COMPATv4 0x0080U
74
75#define IPV6_ADDR_SCOPE_MASK 0x00f0U
76
77#define IPV6_ADDR_MAPPED 0x1000U
1da177e4
LT		 78
79/*
80 * Addr scopes
81 */
1da177e4
LT		 82#define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
84#define __IPV6_ADDR_SCOPE_INVALID -1
1da177e4
LT		 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 */
5ced1339
LL		 94#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
95 ((a)->s6_addr[1] & 0x10)
96#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
97 ((a)->s6_addr[1] & 0x20)
98#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
99 ((a)->s6_addr[1] & 0x40)
5ced1339 100
1da177e4
LT		 101/*
102 * fragmentation header
103 */
104
105struct frag_hdr {
44473a6b
AV		 106 __u8 nexthdr;
107 __u8 reserved;
108 __be16 frag_off;
109 __be32 identification;
1da177e4
LT		 110};
111
112#define IP6_MF 0x0001
113
6fa3eb70
S		 114#define IP6_REPLY_MARK(net, mark) \
115 ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
116
1da177e4
LT		 117#include <net/sock.h>
118
119/* sysctls */
1da177e4 120extern int sysctl_mld_max_msf;
3d7cc2ba 121
087fe240 122#define _DEVINC(net, statname, modifier, idev, field) \
14878f75 123({ \
a11d206d
YH		 124 struct inet6_dev *_idev = (idev); \
125 if (likely(_idev != NULL)) \
14878f75 126 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
9261e537 127 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
a11d206d 128})
14878f75 129
be281e55
ED		 130/* per device counters are atomic_long_t */
131#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
132({ \
133 struct inet6_dev *_idev = (idev); \
134 if (likely(_idev != NULL)) \
135 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
136 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
137})
138
2a24444f
ED		 139/* per device and per net counters are atomic_long_t */
140#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
141({ \
142 struct inet6_dev *_idev = (idev); \
143 if (likely(_idev != NULL)) \
144 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
145 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
146})
147
087fe240 148#define _DEVADD(net, statname, modifier, idev, field, val) \
8e7999c4
PE		 149({ \
150 struct inet6_dev *_idev = (idev); \
151 if (likely(_idev != NULL)) \
152 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
9261e537 153 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
8e7999c4
PE		 154})
155
edf391ff
NH		 156#define _DEVUPD(net, statname, modifier, idev, field, val) \
157({ \
158 struct inet6_dev *_idev = (idev); \
159 if (likely(_idev != NULL)) \
160 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
161 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
162})
163
14878f75 164/* MIBs */
14878f75 165
087fe240 166#define IP6_INC_STATS(net, idev,field) \
4ce3c183 167 _DEVINC(net, ipv6, 64, idev, field)
087fe240 168#define IP6_INC_STATS_BH(net, idev,field) \
4ce3c183 169 _DEVINC(net, ipv6, 64_BH, idev, field)
edf391ff 170#define IP6_ADD_STATS(net, idev,field,val) \
4ce3c183 171 _DEVADD(net, ipv6, 64, idev, field, val)
087fe240 172#define IP6_ADD_STATS_BH(net, idev,field,val) \
4ce3c183 173 _DEVADD(net, ipv6, 64_BH, idev, field, val)
edf391ff 174#define IP6_UPD_PO_STATS(net, idev,field,val) \
4ce3c183 175 _DEVUPD(net, ipv6, 64, idev, field, val)
edf391ff 176#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
4ce3c183 177 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
087fe240 178#define ICMP6_INC_STATS(net, idev, field) \
be281e55 179 _DEVINCATOMIC(net, icmpv6, , idev, field)
087fe240 180#define ICMP6_INC_STATS_BH(net, idev, field) \
be281e55 181 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
087fe240
DL		 182
183#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
2a24444f 184 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
087fe240 185#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
2a24444f 186 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
087fe240 187#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
2a24444f 188 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
14878f75 189
fd2c3ef7 190struct ip6_ra_chain {
1da177e4
LT		 191 struct ip6_ra_chain *next;
192 struct sock *sk;
193 int sel;
194 void (*destructor)(struct sock *);
195};
196
197extern struct ip6_ra_chain *ip6_ra_chain;
198extern rwlock_t ip6_ra_lock;
199
200/*
201 This structure is prepared by protocol, when parsing
202 ancillary data and passed to IPv6.
203 */
204
fd2c3ef7 205struct ipv6_txoptions {
1da177e4
LT		 206 /* Length of this structure */
207 int tot_len;
208
209 /* length of extension headers */
210
211 __u16 opt_flen; /* after fragment hdr */
212 __u16 opt_nflen; /* before fragment hdr */
213
214 struct ipv6_opt_hdr *hopopt;
215 struct ipv6_opt_hdr *dst0opt;
216 struct ipv6_rt_hdr *srcrt; /* Routing Header */
1da177e4
LT		 217 struct ipv6_opt_hdr *dst1opt;
218
219 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
220};
221
fd2c3ef7 222struct ip6_flowlabel {
7f0e44ac 223 struct ip6_flowlabel __rcu *next;
90bcaf7b 224 __be32 label;
db3459d1 225 atomic_t users;
1da177e4
LT		 226 struct in6_addr dst;
227 struct ipv6_txoptions *opt;
1da177e4 228 unsigned long linger;
d3aedd5e 229 struct rcu_head rcu;
1da177e4 230 u8 share;
4f82f457
EB		 231 union {
232 struct pid *pid;
233 kuid_t uid;
234 } owner;
1da177e4
LT		 235 unsigned long lastuse;
236 unsigned long expires;
60e8fbc4 237 struct net *fl_net;
1da177e4
LT		 238};
239
f3a7c66b
HH		 240#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
241#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
1da177e4 242
fd2c3ef7 243struct ipv6_fl_socklist {
7f0e44ac
ED		 244 struct ipv6_fl_socklist __rcu *next;
245 struct ip6_flowlabel *fl;
246 struct rcu_head rcu;
1da177e4
LT		 247};
248
90bcaf7b 249extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
1da177e4
LT		 250extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
251 struct ip6_flowlabel * fl,
252 struct ipv6_txoptions * fopt);
253extern void fl6_free_socklist(struct sock *sk);
254extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
0a3e78ac 255extern int ip6_flowlabel_init(void);
1da177e4
LT		 256extern void ip6_flowlabel_cleanup(void);
257
258static inline void fl6_sock_release(struct ip6_flowlabel *fl)
259{
260 if (fl)
261 atomic_dec(&fl->users);
262}
263
b94f1c09
DM		 264extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
265
6fa3eb70
S		 266int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
267 struct icmp6hdr *thdr, int len);
268
269struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb,
270 struct sock *sk, struct flowi6 *fl6);
271
725a8ff0 272extern int ip6_ra_control(struct sock *sk, int sel);
1da177e4 273
e5bbef20 274extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 275
276extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 277extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
278 int newtype,
279 struct ipv6_opt_hdr __user *newopt,
280 int newoptlen);
df9890c3
YH		 281struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
282 struct ipv6_txoptions *opt);
1da177e4 283
92113bfd 284extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
399c07de 285
aeaf6e9d
SL		 286static inline bool ipv6_accept_ra(struct inet6_dev *idev)
287{
288 /* If forwarding is enabled, RA are not accepted unless the special
289 * hybrid mode (accept_ra=2) is enabled.
290 */
291 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
292 idev->cnf.accept_ra;
293}
294
d4915c08
AW		 295#if IS_ENABLED(CONFIG_IPV6)
296static inline int ip6_frag_nqueues(struct net *net)
297{
298 return net->ipv6.frags.nqueues;
299}
300
301static inline int ip6_frag_mem(struct net *net)
302{
d433673e 303 return sum_frag_mem_limit(&net->ipv6.frags);
d4915c08
AW		 304}
305#endif
1da177e4 306
c2a93660
JDB		 307#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */
308#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */
9874c41c 309#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
1da177e4 310
b1cacb68
YH		 311extern int __ipv6_addr_type(const struct in6_addr *addr);
312static inline int ipv6_addr_type(const struct in6_addr *addr)
313{
314 return __ipv6_addr_type(addr) & 0xffff;
315}
1da177e4
LT		 316
317static inline int ipv6_addr_scope(const struct in6_addr *addr)
318{
b1cacb68
YH		 319 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
320}
321
322static inline int __ipv6_addr_src_scope(int type)
323{
a02cec21 324 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
b1cacb68
YH		 325}
326
327static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
328{
329 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 330}
331
b7ef213e
HFS		 332static inline bool __ipv6_addr_needs_scope_id(int type)
333{
334 return type & IPV6_ADDR_LINKLOCAL ||
335 (type & IPV6_ADDR_MULTICAST &&
336 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
337}
338
339static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
340{
341 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
342}
343
1da177e4
LT		 344static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
345{
db3459d1 346 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 347}
348
1a203cb3 349static inline bool
f2ffd9ee
PM		 350ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
351 const struct in6_addr *a2)
352{
1a203cb3
ED		 353#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
354 const unsigned long *ul1 = (const unsigned long *)a1;
355 const unsigned long *ulm = (const unsigned long *)m;
356 const unsigned long *ul2 = (const unsigned long *)a2;
357
358 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
359 ((ul1[1] ^ ul2[1]) & ulm[1]));
360#else
a02cec21
ED		 361 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
362 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
363 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
364 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
1a203cb3 365#endif
f2ffd9ee
PM		 366}
367
1da177e4
LT		 368static inline void ipv6_addr_prefix(struct in6_addr *pfx,
369 const struct in6_addr *addr,
370 int plen)
371{
372 /* caller must guarantee 0 <= plen <= 128 */
373 int o = plen >> 3,
374 b = plen & 0x7;
375
db3459d1 376 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 377 memcpy(pfx->s6_addr, addr, o);
db3459d1 378 if (b != 0)
1da177e4 379 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 380}
381
5206c579
YH		 382static inline void __ipv6_addr_set_half(__be32 *addr,
383 __be32 wh, __be32 wl)
384{
385#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
386#if defined(__BIG_ENDIAN)
387 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
388 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
389 return;
390 }
391#elif defined(__LITTLE_ENDIAN)
392 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
393 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
394 return;
395 }
396#endif
397#endif
398 addr[0] = wh;
399 addr[1] = wl;
400}
401
1da177e4 402static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 403 __be32 w1, __be32 w2,
404 __be32 w3, __be32 w4)
1da177e4 405{
5206c579
YH		 406 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
407 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
1da177e4 408}
1da177e4 409
92113bfd
ED		 410static inline bool ipv6_addr_equal(const struct in6_addr *a1,
411 const struct in6_addr *a2)
1da177e4 412{
1a203cb3
ED		 413#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
414 const unsigned long *ul1 = (const unsigned long *)a1;
415 const unsigned long *ul2 = (const unsigned long *)a2;
416
417 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
418#else
a02cec21
ED		 419 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
420 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
421 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
422 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
1a203cb3 423#endif
1da177e4
LT		 424}
425
38675170
YH		 426#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
427static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
428 const __be64 *a2,
429 unsigned int len)
430{
512613d7 431 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
38675170
YH		 432 return false;
433 return true;
434}
435
436static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
437 const struct in6_addr *addr2,
438 unsigned int prefixlen)
439{
440 const __be64 *a1 = (const __be64 *)addr1;
441 const __be64 *a2 = (const __be64 *)addr2;
442
443 if (prefixlen >= 64) {
444 if (a1[0] ^ a2[0])
445 return false;
446 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
447 }
448 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
449}
450#else
2ef97332
YH		 451static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
452 const struct in6_addr *addr2,
453 unsigned int prefixlen)
1da177e4 454{
2ef97332
YH		 455 const __be32 *a1 = addr1->s6_addr32;
456 const __be32 *a2 = addr2->s6_addr32;
95c96174 457 unsigned int pdw, pbi;
1da177e4
LT		 458
459 /* check complete u32 in prefix */
460 pdw = prefixlen >> 5;
461 if (pdw && memcmp(a1, a2, pdw << 2))
92113bfd 462 return false;
1da177e4
LT		 463
464 /* check incomplete u32 in prefix */
465 pbi = prefixlen & 0x1f;
466 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
92113bfd 467 return false;
1da177e4 468
92113bfd 469 return true;
1da177e4 470}
38675170 471#endif
1da177e4 472
2588fe1d 473struct inet_frag_queue;
2588fe1d 474
0b5ccb2e
PM		 475enum ip6_defrag_users {
476 IP6_DEFRAG_LOCAL_DELIVER,
477 IP6_DEFRAG_CONNTRACK_IN,
4be929be 478 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
0b5ccb2e 479 IP6_DEFRAG_CONNTRACK_OUT,
4be929be 480 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 481 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 482 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
0b5ccb2e
PM		 483};
484
c6fda282
PE		 485struct ip6_create_arg {
486 __be32 id;
0b5ccb2e 487 u32 user;
b71d1d42
ED		 488 const struct in6_addr *src;
489 const struct in6_addr *dst;
7cd9f602 490 int iif;
eec2e618 491 u8 ecn;
c6fda282
PE		 492};
493
494void ip6_frag_init(struct inet_frag_queue *q, void *a);
cbc264ca 495bool ip6_frag_match(struct inet_frag_queue *q, void *a);
c6fda282 496
b836c99f
AW		 497/*
498 * Equivalent of ipv4 struct ip
499 */
500struct frag_queue {
501 struct inet_frag_queue q;
502
503 __be32 id; /* fragment id */
504 u32 user;
505 struct in6_addr saddr;
506 struct in6_addr daddr;
507
508 int iif;
509 unsigned int csum;
510 __u16 nhoffset;
eec2e618 511 u8 ecn;
b836c99f
AW		 512};
513
514void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
515 struct inet_frags *frags);
516
92113bfd 517static inline bool ipv6_addr_any(const struct in6_addr *a)
1da177e4 518{
1a203cb3
ED		 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]) == 0UL;
523#else
a02cec21
ED		 524 return (a->s6_addr32[0] | a->s6_addr32[1] |
525 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
1a203cb3 526#endif
1da177e4
LT		 527}
528
ddbe5032
ED		 529static inline u32 ipv6_addr_hash(const struct in6_addr *a)
530{
531#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
532 const unsigned long *ul = (const unsigned long *)a;
533 unsigned long x = ul[0] ^ ul[1];
534
535 return (u32)(x ^ (x >> 32));
536#else
537 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
538 a->s6_addr32[2] ^ a->s6_addr32[3]);
539#endif
540}
541
08dcdbf6 542/* more secured version of ipv6_addr_hash() */
ff1f69a8 543static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval)
08dcdbf6
ED		 544{
545 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
546
547 return jhash_3words(v,
548 (__force u32)a->s6_addr32[2],
549 (__force u32)a->s6_addr32[3],
ff1f69a8
ED		 550 initval);
551}
552
553static inline u32 ipv6_addr_jhash(const struct in6_addr *a)
554{
555 return __ipv6_addr_jhash(a, ipv6_hash_secret);
08dcdbf6
ED		 556}
557
92113bfd 558static inline bool ipv6_addr_loopback(const struct in6_addr *a)
f630e43a 559{
e287656b
YH		 560#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
561 const unsigned long *ul = (const unsigned long *)a;
562
563 return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
564#else
a02cec21
ED		 565 return (a->s6_addr32[0] | a->s6_addr32[1] |
566 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
e287656b 567#endif
f630e43a
YH		 568}
569
92113bfd 570static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
e773e4fa 571{
a04d40b8
YH		 572 return (
573#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
574 *(__be64 *)a |
575#else
576 (a->s6_addr32[0] | a->s6_addr32[1]) |
577#endif
578 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
e773e4fa
BH		 579}
580
99cd07a5
JMT		 581/*
582 * Check for a RFC 4843 ORCHID address
583 * (Overlay Routable Cryptographic Hash Identifiers)
584 */
92113bfd 585static inline bool ipv6_addr_orchid(const struct in6_addr *a)
99cd07a5 586{
a02cec21 587 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
99cd07a5
JMT		 588}
589
f15364bd
AC		 590static inline void ipv6_addr_set_v4mapped(const __be32 addr,
591 struct in6_addr *v4mapped)
592{
593 ipv6_addr_set(v4mapped,
594 0, 0,
595 htonl(0x0000FFFF),
596 addr);
597}
598
971f359d
YH		 599/*
600 * find the first different bit between two addresses
601 * length of address must be a multiple of 32bits
602 */
9f2e7334 603static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
971f359d 604{
ef296f56 605 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 606 int i;
607
608 addrlen >>= 2;
609
610 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 611 __be32 xb = a1[i] ^ a2[i];
612 if (xb)
d57b8fb8 613 return i * 32 + 31 - __fls(ntohl(xb));
971f359d
YH		 614 }
615
616 /*
617 * we should *never* get to this point since that
618 * would mean the addrs are equal
619 *
620 * However, we do get to it 8) And exacly, when
621 * addresses are equal 8)
622 *
623 * ip route add 1111::/128 via ...
624 * ip route add 1111::/64 via ...
625 * and we are here.
626 *
627 * Ideally, this function should stop comparison
628 * at prefix length. It does not, but it is still OK,
629 * if returned value is greater than prefix length.
630 * --ANK (980803)
631 */
a02cec21 632 return addrlen << 5;
971f359d
YH		 633}
634
9f2e7334
YH		 635#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
636static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
637{
638 const __be64 *a1 = token1, *a2 = token2;
639 int i;
640
641 addrlen >>= 3;
642
643 for (i = 0; i < addrlen; i++) {
644 __be64 xb = a1[i] ^ a2[i];
645 if (xb)
646 return i * 64 + 63 - __fls(be64_to_cpu(xb));
647 }
648
649 return addrlen << 6;
650}
651#endif
652
653static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
654{
655#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
656 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
657 return __ipv6_addr_diff64(token1, token2, addrlen);
658#endif
659 return __ipv6_addr_diff32(token1, token2, addrlen);
660}
661
971f359d
YH		 662static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
663{
664 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
665}
666
3e4e4c1f
YH		 667/*
668 * Header manipulation
669 */
670static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
671 __be32 flowlabel)
672{
07f623d3 673 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
3e4e4c1f
YH		 674}
675
6502ca52
YH		 676static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
677{
678 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
679}
680
1da177e4
LT		 681/*
682 * Prototypes exported by ipv6
683 */
684
685/*
686 * rcv function (called from netdevice level)
687 */
688
689extern int ipv6_rcv(struct sk_buff *skb,
690 struct net_device *dev,
f2ccd8fa
DM		 691 struct packet_type *pt,
692 struct net_device *orig_dev);
1da177e4 693
b05e1066
PM		 694extern int ip6_rcv_finish(struct sk_buff *skb);
695
1da177e4
LT		 696/*
697 * upper-layer output functions
698 */
699extern int ip6_xmit(struct sock *sk,
700 struct sk_buff *skb,
4c9483b2 701 struct flowi6 *fl6,
b903d324
ED		 702 struct ipv6_txoptions *opt,
703 int tclass);
1da177e4 704
1da177e4
LT		 705extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
706
707extern int ip6_append_data(struct sock *sk,
708 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
709 void *from,
710 int length,
711 int transhdrlen,
712 int hlimit,
41a1f8ea 713 int tclass,
1da177e4 714 struct ipv6_txoptions *opt,
4c9483b2 715 struct flowi6 *fl6,
1da177e4 716 struct rt6_info *rt,
13b52cd4
BH		 717 unsigned int flags,
718 int dontfrag);
1da177e4
LT		 719
720extern int ip6_push_pending_frames(struct sock *sk);
721
722extern void ip6_flush_pending_frames(struct sock *sk);
723
724extern int ip6_dst_lookup(struct sock *sk,
725 struct dst_entry **dst,
4c9483b2 726 struct flowi6 *fl6);
68d0c6d3 727extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
4c9483b2 728 struct flowi6 *fl6,
68d0c6d3 729 const struct in6_addr *final_dst,
a1414715 730 bool can_sleep);
68d0c6d3 731extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
4c9483b2 732 struct flowi6 *fl6,
68d0c6d3 733 const struct in6_addr *final_dst,
a1414715 734 bool can_sleep);
2774c131
DM		 735extern struct dst_entry * ip6_blackhole_route(struct net *net,
736 struct dst_entry *orig_dst);
1da177e4
LT		 737
738/*
739 * skb processing functions
740 */
741
742extern int ip6_output(struct sk_buff *skb);
743extern int ip6_forward(struct sk_buff *skb);
744extern int ip6_input(struct sk_buff *skb);
745extern int ip6_mc_input(struct sk_buff *skb);
746
ef76bc23
HX		 747extern int __ip6_local_out(struct sk_buff *skb);
748extern int ip6_local_out(struct sk_buff *skb);
749
1da177e4
LT		 750/*
751 * Extension header (options) processing
752 */
753
1da177e4
LT		 754extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
755 struct ipv6_txoptions *opt,
756 u8 *proto,
757 struct in6_addr **daddr_p);
758extern void ipv6_push_frag_opts(struct sk_buff *skb,
759 struct ipv6_txoptions *opt,
760 u8 *proto);
761
762extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
75f2811c 763 u8 *nexthdrp, __be16 *frag_offp);
1da177e4 764
a50feda5 765extern bool ipv6_ext_hdr(u8 nexthdr);
1da177e4 766
f8f62675 767enum {
9195bb8e
AA		 768 IP6_FH_F_FRAG = (1 << 0),
769 IP6_FH_F_AUTH = (1 << 1),
770 IP6_FH_F_SKIP_RH = (1 << 2),
f8f62675
JG		 771};
772
773/* find specified header and get offset to it */
774extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
775 int target, unsigned short *fragoff, int *fragflg);
776
c61a4043
MN		 777extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
778
4c9483b2 779extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
20c59de2
AE		 780 const struct ipv6_txoptions *opt,
781 struct in6_addr *orig);
782
1da177e4
LT		 783/*
784 * socket options (ipv6_sockglue.c)
785 */
786
787extern int ipv6_setsockopt(struct sock *sk, int level,
788 int optname,
789 char __user *optval,
b7058842 790 unsigned int optlen);
1da177e4
LT		 791extern int ipv6_getsockopt(struct sock *sk, int level,
792 int optname,
793 char __user *optval,
794 int __user *optlen);
3fdadf7d
DM		 795extern int compat_ipv6_setsockopt(struct sock *sk,
796 int level,
797 int optname,
798 char __user *optval,
b7058842 799 unsigned int optlen);
3fdadf7d
DM		 800extern int compat_ipv6_getsockopt(struct sock *sk,
801 int level,
802 int optname,
803 char __user *optval,
804 int __user *optlen);
1da177e4 805
1da177e4
LT		 806extern int ip6_datagram_connect(struct sock *sk,
807 struct sockaddr *addr, int addr_len);
808
08c62a10
HFS		 809extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
810 int *addr_len);
811extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
812 int *addr_len);
e69a4adc 813extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
1da177e4 814 u32 info, u8 *payload);
4c9483b2
DM		 815extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
816extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
1da177e4
LT		 817
818extern int inet6_release(struct socket *sock);
819extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
820 int addr_len);
821extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
822 int *uaddr_len, int peer);
823extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
824 unsigned long arg);
825
d8313f5c
ACM		 826extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
827 struct sock *sk);
828
1da177e4
LT		 829/*
830 * reassembly.c
831 */
90ddc4f0
ED		 832extern const struct proto_ops inet6_stream_ops;
833extern const struct proto_ops inet6_dgram_ops;
f7eb769a 834extern const struct proto_ops inet6_sockraw_ops;
20380731 835
14c85021
ACM		 836struct group_source_req;
837struct group_filter;
838
20380731
ACM		 839extern int ip6_mc_source(int add, int omode, struct sock *sk,
840 struct group_source_req *pgsr);
841extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
842extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
843 struct group_filter __user *optval,
844 int __user *optlen);
93c8b90f
IJ		 845extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
846 const struct in6_addr *daddr, u32 rnd);
20380731
ACM		 847
848#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 849extern int ac6_proc_init(struct net *net);
850extern void ac6_proc_exit(struct net *net);
20380731
ACM		 851extern int raw6_proc_init(void);
852extern void raw6_proc_exit(void);
6f8b13bc
DL		 853extern int tcp6_proc_init(struct net *net);
854extern void tcp6_proc_exit(struct net *net);
0c96d8c5
DL		 855extern int udp6_proc_init(struct net *net);
856extern void udp6_proc_exit(struct net *net);
ba4e58ec
GR		 857extern int udplite6_proc_init(void);
858extern void udplite6_proc_exit(void);
20380731
ACM		 859extern int ipv6_misc_proc_init(void);
860extern void ipv6_misc_proc_exit(void);
7f7d9a6b
HX		 861extern int snmp6_register_dev(struct inet6_dev *idev);
862extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 863
7f7d9a6b 864#else
6ab57e7e
DL		 865static inline int ac6_proc_init(struct net *net) { return 0; }
866static inline void ac6_proc_exit(struct net *net) { }
867static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
868static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731 869#endif
1da177e4 870
20380731 871#ifdef CONFIG_SYSCTL
760f2d01
DL		 872extern ctl_table ipv6_route_table_template[];
873extern ctl_table ipv6_icmp_table_template[];
1da177e4 874
6de1a910
DL		 875extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
876extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
291480c0 877extern int ipv6_sysctl_register(void);
20380731
ACM		 878extern void ipv6_sysctl_unregister(void);
879#endif
1da177e4 880
20380731 881#endif /* _NET_IPV6_H */
kernel source for telekom puls (alcatel/mediatek)