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[MAC80211]: Remove bitfields from struct ieee80211_if_sta
[linux-2.6/mini2440.git] / include / net / ipv6.h
blob9573c8d1915370d04df50ead4345cd128eaf1f73
1 /*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
7 * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15 #ifndef _NET_IPV6_H
16 #define _NET_IPV6_H
17
18 #include <linux/ipv6.h>
19 #include <linux/hardirq.h>
20 #include <net/if_inet6.h>
21 #include <net/ndisc.h>
22 #include <net/flow.h>
23 #include <net/snmp.h>
24
25 #define SIN6_LEN_RFC2133 24
26
27 #define IPV6_MAXPLEN 65535
28
29 /*
30 * NextHeader field of IPv6 header
31 */
32
33 #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
34 #define NEXTHDR_TCP 6 /* TCP segment. */
35 #define NEXTHDR_UDP 17 /* UDP message. */
36 #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
37 #define NEXTHDR_ROUTING 43 /* Routing header. */
38 #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
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. */
44 #define NEXTHDR_MOBILITY 135 /* Mobility header. */
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
78 #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
79
80 /*
81 * Addr scopes
82 */
83 #ifdef __KERNEL__
84 #define IPV6_ADDR_MC_SCOPE(a) \
85 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
86 #define __IPV6_ADDR_SCOPE_INVALID -1
87 #endif
88 #define IPV6_ADDR_SCOPE_NODELOCAL 0x01
89 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
90 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05
91 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
92 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e
93
94 /*
95 * fragmentation header
96 */
97
98 struct frag_hdr {
99 __u8 nexthdr;
100 __u8 reserved;
101 __be16 frag_off;
102 __be32 identification;
103 };
104
105 #define IP6_MF 0x0001
106
107 #ifdef __KERNEL__
108
109 #include <net/sock.h>
110
111 /* sysctls */
112 extern int sysctl_ipv6_bindv6only;
113 extern int sysctl_mld_max_msf;
114
115 /* MIBs */
116 DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
117 #define IP6_INC_STATS(idev,field) ({ \
118 struct inet6_dev *_idev = (idev); \
119 if (likely(_idev != NULL)) \
120 SNMP_INC_STATS(_idev->stats.ipv6, field); \
121 SNMP_INC_STATS(ipv6_statistics, field); \
122 })
123 #define IP6_INC_STATS_BH(idev,field) ({ \
124 struct inet6_dev *_idev = (idev); \
125 if (likely(_idev != NULL)) \
126 SNMP_INC_STATS_BH(_idev->stats.ipv6, field); \
127 SNMP_INC_STATS_BH(ipv6_statistics, field); \
128 })
129 #define IP6_INC_STATS_USER(idev,field) ({ \
130 struct inet6_dev *_idev = (idev); \
131 if (likely(_idev != NULL)) \
132 SNMP_INC_STATS_USER(_idev->stats.ipv6, field); \
133 SNMP_INC_STATS_USER(ipv6_statistics, field); \
134 })
135 DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
136 #define ICMP6_INC_STATS(idev, field) ({ \
137 struct inet6_dev *_idev = (idev); \
138 if (likely(_idev != NULL)) \
139 SNMP_INC_STATS(idev->stats.icmpv6, field); \
140 SNMP_INC_STATS(icmpv6_statistics, field); \
141 })
142 #define ICMP6_INC_STATS_BH(idev, field) ({ \
143 struct inet6_dev *_idev = (idev); \
144 if (likely(_idev != NULL)) \
145 SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \
146 SNMP_INC_STATS_BH(icmpv6_statistics, field); \
147 })
148 #define ICMP6_INC_STATS_USER(idev, field) ({ \
149 struct inet6_dev *_idev = (idev); \
150 if (likely(_idev != NULL)) \
151 SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \
152 SNMP_INC_STATS_USER(icmpv6_statistics, field); \
153 })
154 #define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \
155 struct inet6_dev *_idev = idev; \
156 __typeof__(offset) _offset = (offset); \
157 if (likely(_idev != NULL)) \
158 SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \
159 SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \
160 })
161 DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
162 DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
163 #define UDP6_INC_STATS_BH(field, is_udplite) do { \
164 if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field); \
165 else SNMP_INC_STATS_BH(udp_stats_in6, field); } while(0)
166 #define UDP6_INC_STATS_USER(field, is_udplite) do { \
167 if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field); \
168 else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0)
169
170 struct ip6_ra_chain
171 {
172 struct ip6_ra_chain *next;
173 struct sock *sk;
174 int sel;
175 void (*destructor)(struct sock *);
176 };
177
178 extern struct ip6_ra_chain *ip6_ra_chain;
179 extern rwlock_t ip6_ra_lock;
180
181 /*
182 This structure is prepared by protocol, when parsing
183 ancillary data and passed to IPv6.
184 */
185
186 struct ipv6_txoptions
187 {
188 /* Length of this structure */
189 int tot_len;
190
191 /* length of extension headers */
192
193 __u16 opt_flen; /* after fragment hdr */
194 __u16 opt_nflen; /* before fragment hdr */
195
196 struct ipv6_opt_hdr *hopopt;
197 struct ipv6_opt_hdr *dst0opt;
198 struct ipv6_rt_hdr *srcrt; /* Routing Header */
199 struct ipv6_opt_hdr *dst1opt;
200
201 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
202 };
203
204 struct ip6_flowlabel
205 {
206 struct ip6_flowlabel *next;
207 __be32 label;
208 atomic_t users;
209 struct in6_addr dst;
210 struct ipv6_txoptions *opt;
211 unsigned long linger;
212 u8 share;
213 u32 owner;
214 unsigned long lastuse;
215 unsigned long expires;
216 };
217
218 #define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
219 #define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
220
221 struct ipv6_fl_socklist
222 {
223 struct ipv6_fl_socklist *next;
224 struct ip6_flowlabel *fl;
225 };
226
227 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
228 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
229 struct ip6_flowlabel * fl,
230 struct ipv6_txoptions * fopt);
231 extern void fl6_free_socklist(struct sock *sk);
232 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
233 extern void ip6_flowlabel_init(void);
234 extern void ip6_flowlabel_cleanup(void);
235
236 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
237 {
238 if (fl)
239 atomic_dec(&fl->users);
240 }
241
242 extern int ip6_ra_control(struct sock *sk, int sel,
243 void (*destructor)(struct sock *));
244
245
246 extern int ipv6_parse_hopopts(struct sk_buff **skbp);
247
248 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
249 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
250 int newtype,
251 struct ipv6_opt_hdr __user *newopt,
252 int newoptlen);
253 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
254 struct ipv6_txoptions *opt);
255
256 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
257
258 extern int ip6_frag_nqueues;
259 extern atomic_t ip6_frag_mem;
260
261 #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
262
263 /*
264 * Function prototype for build_xmit
265 */
266
267 typedef int (*inet_getfrag_t) (const void *data,
268 struct in6_addr *addr,
269 char *,
270 unsigned int, unsigned int);
271
272 extern int __ipv6_addr_type(const struct in6_addr *addr);
273 static inline int ipv6_addr_type(const struct in6_addr *addr)
274 {
275 return __ipv6_addr_type(addr) & 0xffff;
276 }
277
278 static inline int ipv6_addr_scope(const struct in6_addr *addr)
279 {
280 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
281 }
282
283 static inline int __ipv6_addr_src_scope(int type)
284 {
285 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
286 }
287
288 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
289 {
290 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
291 }
292
293 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
294 {
295 return memcmp(a1, a2, sizeof(struct in6_addr));
296 }
297
298 static inline int
299 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
300 const struct in6_addr *a2)
301 {
302 unsigned int i;
303
304 for (i = 0; i < 4; i++)
305 if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
306 return 1;
307 return 0;
308 }
309
310 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
311 {
312 memcpy(a1, a2, sizeof(struct in6_addr));
313 }
314
315 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
316 const struct in6_addr *addr,
317 int plen)
318 {
319 /* caller must guarantee 0 <= plen <= 128 */
320 int o = plen >> 3,
321 b = plen & 0x7;
322
323 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
324 memcpy(pfx->s6_addr, addr, o);
325 if (b != 0)
326 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
327 }
328
329 static inline void ipv6_addr_set(struct in6_addr *addr,
330 __be32 w1, __be32 w2,
331 __be32 w3, __be32 w4)
332 {
333 addr->s6_addr32[0] = w1;
334 addr->s6_addr32[1] = w2;
335 addr->s6_addr32[2] = w3;
336 addr->s6_addr32[3] = w4;
337 }
338
339 static inline int ipv6_addr_equal(const struct in6_addr *a1,
340 const struct in6_addr *a2)
341 {
342 return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
343 a1->s6_addr32[1] == a2->s6_addr32[1] &&
344 a1->s6_addr32[2] == a2->s6_addr32[2] &&
345 a1->s6_addr32[3] == a2->s6_addr32[3]);
346 }
347
348 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
349 unsigned int prefixlen)
350 {
351 unsigned pdw, pbi;
352
353 /* check complete u32 in prefix */
354 pdw = prefixlen >> 5;
355 if (pdw && memcmp(a1, a2, pdw << 2))
356 return 0;
357
358 /* check incomplete u32 in prefix */
359 pbi = prefixlen & 0x1f;
360 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
361 return 0;
362
363 return 1;
364 }
365
366 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
367 const struct in6_addr *a2,
368 unsigned int prefixlen)
369 {
370 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
371 prefixlen);
372 }
373
374 static inline int ipv6_addr_any(const struct in6_addr *a)
375 {
376 return ((a->s6_addr32[0] | a->s6_addr32[1] |
377 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
378 }
379
380 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
381 {
382 return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 &&
383 a->s6_addr32[2] == htonl(0x0000ffff));
384 }
385
386 /*
387 * find the first different bit between two addresses
388 * length of address must be a multiple of 32bits
389 */
390 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
391 {
392 const __be32 *a1 = token1, *a2 = token2;
393 int i;
394
395 addrlen >>= 2;
396
397 for (i = 0; i < addrlen; i++) {
398 __be32 xb = a1[i] ^ a2[i];
399 if (xb)
400 return i * 32 + 32 - fls(ntohl(xb));
401 }
402
403 /*
404 * we should *never* get to this point since that
405 * would mean the addrs are equal
406 *
407 * However, we do get to it 8) And exacly, when
408 * addresses are equal 8)
409 *
410 * ip route add 1111::/128 via ...
411 * ip route add 1111::/64 via ...
412 * and we are here.
413 *
414 * Ideally, this function should stop comparison
415 * at prefix length. It does not, but it is still OK,
416 * if returned value is greater than prefix length.
417 * --ANK (980803)
418 */
419 return (addrlen << 5);
420 }
421
422 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
423 {
424 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
425 }
426
427 /*
428 * Prototypes exported by ipv6
429 */
430
431 /*
432 * rcv function (called from netdevice level)
433 */
434
435 extern int ipv6_rcv(struct sk_buff *skb,
436 struct net_device *dev,
437 struct packet_type *pt,
438 struct net_device *orig_dev);
439
440 extern int ip6_rcv_finish(struct sk_buff *skb);
441
442 /*
443 * upper-layer output functions
444 */
445 extern int ip6_xmit(struct sock *sk,
446 struct sk_buff *skb,
447 struct flowi *fl,
448 struct ipv6_txoptions *opt,
449 int ipfragok);
450
451 extern int ip6_nd_hdr(struct sock *sk,
452 struct sk_buff *skb,
453 struct net_device *dev,
454 struct in6_addr *saddr,
455 struct in6_addr *daddr,
456 int proto, int len);
457
458 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
459
460 extern int ip6_append_data(struct sock *sk,
461 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
462 void *from,
463 int length,
464 int transhdrlen,
465 int hlimit,
466 int tclass,
467 struct ipv6_txoptions *opt,
468 struct flowi *fl,
469 struct rt6_info *rt,
470 unsigned int flags);
471
472 extern int ip6_push_pending_frames(struct sock *sk);
473
474 extern void ip6_flush_pending_frames(struct sock *sk);
475
476 extern int ip6_dst_lookup(struct sock *sk,
477 struct dst_entry **dst,
478 struct flowi *fl);
479 extern int ip6_dst_blackhole(struct sock *sk,
480 struct dst_entry **dst,
481 struct flowi *fl);
482 extern int ip6_sk_dst_lookup(struct sock *sk,
483 struct dst_entry **dst,
484 struct flowi *fl);
485
486 /*
487 * skb processing functions
488 */
489
490 extern int ip6_output(struct sk_buff *skb);
491 extern int ip6_forward(struct sk_buff *skb);
492 extern int ip6_input(struct sk_buff *skb);
493 extern int ip6_mc_input(struct sk_buff *skb);
494
495 /*
496 * Extension header (options) processing
497 */
498
499 extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
500 u8 *prev_hdr,
501 struct ipv6_txoptions *opt,
502 struct in6_addr *daddr,
503 u32 jumbolen);
504 extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
505 u8 *prev_hdr,
506 struct ipv6_txoptions *opt);
507 extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
508 struct ipv6_txoptions *opt,
509 u8 *proto,
510 struct in6_addr **daddr_p);
511 extern void ipv6_push_frag_opts(struct sk_buff *skb,
512 struct ipv6_txoptions *opt,
513 u8 *proto);
514
515 extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
516 u8 *nexthdrp);
517
518 extern int ipv6_ext_hdr(u8 nexthdr);
519
520 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
521
522 /*
523 * socket options (ipv6_sockglue.c)
524 */
525
526 extern int ipv6_setsockopt(struct sock *sk, int level,
527 int optname,
528 char __user *optval,
529 int optlen);
530 extern int ipv6_getsockopt(struct sock *sk, int level,
531 int optname,
532 char __user *optval,
533 int __user *optlen);
534 extern int compat_ipv6_setsockopt(struct sock *sk,
535 int level,
536 int optname,
537 char __user *optval,
538 int optlen);
539 extern int compat_ipv6_getsockopt(struct sock *sk,
540 int level,
541 int optname,
542 char __user *optval,
543 int __user *optlen);
544
545 extern void ipv6_packet_init(void);
546
547 extern void ipv6_packet_cleanup(void);
548
549 extern int ip6_datagram_connect(struct sock *sk,
550 struct sockaddr *addr, int addr_len);
551
552 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
553 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
554 u32 info, u8 *payload);
555 extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
556
557 extern int inet6_release(struct socket *sock);
558 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
559 int addr_len);
560 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
561 int *uaddr_len, int peer);
562 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
563 unsigned long arg);
564
565 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
566 struct sock *sk);
567
568 /*
569 * reassembly.c
570 */
571 extern int sysctl_ip6frag_high_thresh;
572 extern int sysctl_ip6frag_low_thresh;
573 extern int sysctl_ip6frag_time;
574 extern int sysctl_ip6frag_secret_interval;
575
576 extern const struct proto_ops inet6_stream_ops;
577 extern const struct proto_ops inet6_dgram_ops;
578
579 struct group_source_req;
580 struct group_filter;
581
582 extern int ip6_mc_source(int add, int omode, struct sock *sk,
583 struct group_source_req *pgsr);
584 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
585 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
586 struct group_filter __user *optval,
587 int __user *optlen);
588
589 #ifdef CONFIG_PROC_FS
590 extern int ac6_proc_init(void);
591 extern void ac6_proc_exit(void);
592 extern int raw6_proc_init(void);
593 extern void raw6_proc_exit(void);
594 extern int tcp6_proc_init(void);
595 extern void tcp6_proc_exit(void);
596 extern int udp6_proc_init(void);
597 extern void udp6_proc_exit(void);
598 extern int udplite6_proc_init(void);
599 extern void udplite6_proc_exit(void);
600 extern int ipv6_misc_proc_init(void);
601 extern void ipv6_misc_proc_exit(void);
602 extern int snmp6_register_dev(struct inet6_dev *idev);
603 extern int snmp6_unregister_dev(struct inet6_dev *idev);
604
605 extern struct rt6_statistics rt6_stats;
606 #else
607 static inline int snmp6_register_dev(struct inet6_dev *idev)
608 {
609 return 0;
610 }
611
612 static inline int snmp6_unregister_dev(struct inet6_dev *idev)
613 {
614 return 0;
615 }
616 #endif
617
618 #ifdef CONFIG_SYSCTL
619 extern ctl_table ipv6_route_table[];
620 extern ctl_table ipv6_icmp_table[];
621
622 extern void ipv6_sysctl_register(void);
623 extern void ipv6_sysctl_unregister(void);
624 #endif
625
626 #endif /* __KERNEL__ */
627 #endif /* _NET_IPV6_H */
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