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Linux 2.6.33-rc2
[pohmelfs.git] / include / net / ipv6.h
blobccab5946c830da21409190aac9b854f0f905264a
1 /*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
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>
18 #include <net/if_inet6.h>
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. */
42 #define NEXTHDR_MOBILITY 135 /* Mobility header. */
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
76 #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
77
78 /*
79 * Addr scopes
80 */
81 #ifdef __KERNEL__
82 #define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
84 #define __IPV6_ADDR_SCOPE_INVALID -1
85 #endif
86 #define IPV6_ADDR_SCOPE_NODELOCAL 0x01
87 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
88 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05
89 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
90 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e
91
92 /*
93 * fragmentation header
94 */
95
96 struct frag_hdr {
97 __u8 nexthdr;
98 __u8 reserved;
99 __be16 frag_off;
100 __be32 identification;
101 };
102
103 #define IP6_MF 0x0001
104
105 #ifdef __KERNEL__
106
107 #include <net/sock.h>
108
109 /* sysctls */
110 extern int sysctl_mld_max_msf;
111 extern struct ctl_path net_ipv6_ctl_path[];
112
113 #define _DEVINC(net, statname, modifier, idev, field) \
114 ({ \
115 struct inet6_dev *_idev = (idev); \
116 if (likely(_idev != NULL)) \
117 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
118 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
119 })
120
121 #define _DEVADD(net, statname, modifier, idev, field, val) \
122 ({ \
123 struct inet6_dev *_idev = (idev); \
124 if (likely(_idev != NULL)) \
125 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
126 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
127 })
128
129 #define _DEVUPD(net, statname, modifier, idev, field, val) \
130 ({ \
131 struct inet6_dev *_idev = (idev); \
132 if (likely(_idev != NULL)) \
133 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
134 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
135 })
136
137 /* MIBs */
138
139 #define IP6_INC_STATS(net, idev,field) \
140 _DEVINC(net, ipv6, , idev, field)
141 #define IP6_INC_STATS_BH(net, idev,field) \
142 _DEVINC(net, ipv6, _BH, idev, field)
143 #define IP6_ADD_STATS(net, idev,field,val) \
144 _DEVADD(net, ipv6, , idev, field, val)
145 #define IP6_ADD_STATS_BH(net, idev,field,val) \
146 _DEVADD(net, ipv6, _BH, idev, field, val)
147 #define IP6_UPD_PO_STATS(net, idev,field,val) \
148 _DEVUPD(net, ipv6, , idev, field, val)
149 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
150 _DEVUPD(net, ipv6, _BH, idev, field, val)
151 #define ICMP6_INC_STATS(net, idev, field) \
152 _DEVINC(net, icmpv6, , idev, field)
153 #define ICMP6_INC_STATS_BH(net, idev, field) \
154 _DEVINC(net, icmpv6, _BH, idev, field)
155
156 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \
157 _DEVINC(net, icmpv6msg, , idev, field +256)
158 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
159 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
160 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
161 _DEVINC(net, icmpv6msg, _BH, idev, field)
162
163 struct ip6_ra_chain {
164 struct ip6_ra_chain *next;
165 struct sock *sk;
166 int sel;
167 void (*destructor)(struct sock *);
168 };
169
170 extern struct ip6_ra_chain *ip6_ra_chain;
171 extern rwlock_t ip6_ra_lock;
172
173 /*
174 This structure is prepared by protocol, when parsing
175 ancillary data and passed to IPv6.
176 */
177
178 struct ipv6_txoptions {
179 /* Length of this structure */
180 int tot_len;
181
182 /* length of extension headers */
183
184 __u16 opt_flen; /* after fragment hdr */
185 __u16 opt_nflen; /* before fragment hdr */
186
187 struct ipv6_opt_hdr *hopopt;
188 struct ipv6_opt_hdr *dst0opt;
189 struct ipv6_rt_hdr *srcrt; /* Routing Header */
190 struct ipv6_opt_hdr *dst1opt;
191
192 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
193 };
194
195 struct ip6_flowlabel {
196 struct ip6_flowlabel *next;
197 __be32 label;
198 atomic_t users;
199 struct in6_addr dst;
200 struct ipv6_txoptions *opt;
201 unsigned long linger;
202 u8 share;
203 u32 owner;
204 unsigned long lastuse;
205 unsigned long expires;
206 struct net *fl_net;
207 };
208
209 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
210 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
211
212 struct ipv6_fl_socklist {
213 struct ipv6_fl_socklist *next;
214 struct ip6_flowlabel *fl;
215 };
216
217 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
218 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
219 struct ip6_flowlabel * fl,
220 struct ipv6_txoptions * fopt);
221 extern void fl6_free_socklist(struct sock *sk);
222 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
223 extern int ip6_flowlabel_init(void);
224 extern void ip6_flowlabel_cleanup(void);
225
226 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
227 {
228 if (fl)
229 atomic_dec(&fl->users);
230 }
231
232 extern int ip6_ra_control(struct sock *sk, int sel);
233
234 extern int ipv6_parse_hopopts(struct sk_buff *skb);
235
236 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
237 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
238 int newtype,
239 struct ipv6_opt_hdr __user *newopt,
240 int newoptlen);
241 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
242 struct ipv6_txoptions *opt);
243
244 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
245
246 int ip6_frag_nqueues(struct net *net);
247 int ip6_frag_mem(struct net *net);
248
249 #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
250
251 extern int __ipv6_addr_type(const struct in6_addr *addr);
252 static inline int ipv6_addr_type(const struct in6_addr *addr)
253 {
254 return __ipv6_addr_type(addr) & 0xffff;
255 }
256
257 static inline int ipv6_addr_scope(const struct in6_addr *addr)
258 {
259 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
260 }
261
262 static inline int __ipv6_addr_src_scope(int type)
263 {
264 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
265 }
266
267 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
268 {
269 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
270 }
271
272 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
273 {
274 return memcmp(a1, a2, sizeof(struct in6_addr));
275 }
276
277 static inline int
278 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
279 const struct in6_addr *a2)
280 {
281 return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
282 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
283 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
284 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
285 }
286
287 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
288 {
289 memcpy(a1, a2, sizeof(struct in6_addr));
290 }
291
292 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
293 const struct in6_addr *addr,
294 int plen)
295 {
296 /* caller must guarantee 0 <= plen <= 128 */
297 int o = plen >> 3,
298 b = plen & 0x7;
299
300 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
301 memcpy(pfx->s6_addr, addr, o);
302 if (b != 0)
303 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
304 }
305
306 static inline void ipv6_addr_set(struct in6_addr *addr,
307 __be32 w1, __be32 w2,
308 __be32 w3, __be32 w4)
309 {
310 addr->s6_addr32[0] = w1;
311 addr->s6_addr32[1] = w2;
312 addr->s6_addr32[2] = w3;
313 addr->s6_addr32[3] = w4;
314 }
315
316 static inline int ipv6_addr_equal(const struct in6_addr *a1,
317 const struct in6_addr *a2)
318 {
319 return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
320 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
321 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
322 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
323 }
324
325 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
326 unsigned int prefixlen)
327 {
328 unsigned pdw, pbi;
329
330 /* check complete u32 in prefix */
331 pdw = prefixlen >> 5;
332 if (pdw && memcmp(a1, a2, pdw << 2))
333 return 0;
334
335 /* check incomplete u32 in prefix */
336 pbi = prefixlen & 0x1f;
337 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
338 return 0;
339
340 return 1;
341 }
342
343 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
344 const struct in6_addr *a2,
345 unsigned int prefixlen)
346 {
347 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
348 prefixlen);
349 }
350
351 struct inet_frag_queue;
352
353 enum ip6_defrag_users {
354 IP6_DEFRAG_LOCAL_DELIVER,
355 IP6_DEFRAG_CONNTRACK_IN,
356 IP6_DEFRAG_CONNTRACK_OUT,
357 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
358 };
359
360 struct ip6_create_arg {
361 __be32 id;
362 u32 user;
363 struct in6_addr *src;
364 struct in6_addr *dst;
365 };
366
367 void ip6_frag_init(struct inet_frag_queue *q, void *a);
368 int ip6_frag_match(struct inet_frag_queue *q, void *a);
369
370 static inline int ipv6_addr_any(const struct in6_addr *a)
371 {
372 return ((a->s6_addr32[0] | a->s6_addr32[1] |
373 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
374 }
375
376 static inline int ipv6_addr_loopback(const struct in6_addr *a)
377 {
378 return ((a->s6_addr32[0] | a->s6_addr32[1] |
379 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
380 }
381
382 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
383 {
384 return ((a->s6_addr32[0] | a->s6_addr32[1] |
385 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
386 }
387
388 /*
389 * Check for a RFC 4843 ORCHID address
390 * (Overlay Routable Cryptographic Hash Identifiers)
391 */
392 static inline int ipv6_addr_orchid(const struct in6_addr *a)
393 {
394 return ((a->s6_addr32[0] & htonl(0xfffffff0))
395 == htonl(0x20010010));
396 }
397
398 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
399 struct in6_addr *v4mapped)
400 {
401 ipv6_addr_set(v4mapped,
402 0, 0,
403 htonl(0x0000FFFF),
404 addr);
405 }
406
407 /*
408 * find the first different bit between two addresses
409 * length of address must be a multiple of 32bits
410 */
411 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
412 {
413 const __be32 *a1 = token1, *a2 = token2;
414 int i;
415
416 addrlen >>= 2;
417
418 for (i = 0; i < addrlen; i++) {
419 __be32 xb = a1[i] ^ a2[i];
420 if (xb)
421 return i * 32 + 32 - fls(ntohl(xb));
422 }
423
424 /*
425 * we should *never* get to this point since that
426 * would mean the addrs are equal
427 *
428 * However, we do get to it 8) And exacly, when
429 * addresses are equal 8)
430 *
431 * ip route add 1111::/128 via ...
432 * ip route add 1111::/64 via ...
433 * and we are here.
434 *
435 * Ideally, this function should stop comparison
436 * at prefix length. It does not, but it is still OK,
437 * if returned value is greater than prefix length.
438 * --ANK (980803)
439 */
440 return (addrlen << 5);
441 }
442
443 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
444 {
445 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
446 }
447
448 static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
449 {
450 static u32 ipv6_fragmentation_id = 1;
451 static DEFINE_SPINLOCK(ip6_id_lock);
452
453 spin_lock_bh(&ip6_id_lock);
454 fhdr->identification = htonl(ipv6_fragmentation_id);
455 if (++ipv6_fragmentation_id == 0)
456 ipv6_fragmentation_id = 1;
457 spin_unlock_bh(&ip6_id_lock);
458 }
459
460 /*
461 * Prototypes exported by ipv6
462 */
463
464 /*
465 * rcv function (called from netdevice level)
466 */
467
468 extern int ipv6_rcv(struct sk_buff *skb,
469 struct net_device *dev,
470 struct packet_type *pt,
471 struct net_device *orig_dev);
472
473 extern int ip6_rcv_finish(struct sk_buff *skb);
474
475 /*
476 * upper-layer output functions
477 */
478 extern int ip6_xmit(struct sock *sk,
479 struct sk_buff *skb,
480 struct flowi *fl,
481 struct ipv6_txoptions *opt,
482 int ipfragok);
483
484 extern int ip6_nd_hdr(struct sock *sk,
485 struct sk_buff *skb,
486 struct net_device *dev,
487 const struct in6_addr *saddr,
488 const struct in6_addr *daddr,
489 int proto, int len);
490
491 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
492
493 extern int ip6_append_data(struct sock *sk,
494 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
495 void *from,
496 int length,
497 int transhdrlen,
498 int hlimit,
499 int tclass,
500 struct ipv6_txoptions *opt,
501 struct flowi *fl,
502 struct rt6_info *rt,
503 unsigned int flags);
504
505 extern int ip6_push_pending_frames(struct sock *sk);
506
507 extern void ip6_flush_pending_frames(struct sock *sk);
508
509 extern int ip6_dst_lookup(struct sock *sk,
510 struct dst_entry **dst,
511 struct flowi *fl);
512 extern int ip6_dst_blackhole(struct sock *sk,
513 struct dst_entry **dst,
514 struct flowi *fl);
515 extern int ip6_sk_dst_lookup(struct sock *sk,
516 struct dst_entry **dst,
517 struct flowi *fl);
518
519 /*
520 * skb processing functions
521 */
522
523 extern int ip6_output(struct sk_buff *skb);
524 extern int ip6_forward(struct sk_buff *skb);
525 extern int ip6_input(struct sk_buff *skb);
526 extern int ip6_mc_input(struct sk_buff *skb);
527
528 extern int __ip6_local_out(struct sk_buff *skb);
529 extern int ip6_local_out(struct sk_buff *skb);
530
531 /*
532 * Extension header (options) processing
533 */
534
535 extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
536 struct ipv6_txoptions *opt,
537 u8 *proto,
538 struct in6_addr **daddr_p);
539 extern void ipv6_push_frag_opts(struct sk_buff *skb,
540 struct ipv6_txoptions *opt,
541 u8 *proto);
542
543 extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
544 u8 *nexthdrp);
545
546 extern int ipv6_ext_hdr(u8 nexthdr);
547
548 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
549
550 /*
551 * socket options (ipv6_sockglue.c)
552 */
553
554 extern int ipv6_setsockopt(struct sock *sk, int level,
555 int optname,
556 char __user *optval,
557 unsigned int optlen);
558 extern int ipv6_getsockopt(struct sock *sk, int level,
559 int optname,
560 char __user *optval,
561 int __user *optlen);
562 extern int compat_ipv6_setsockopt(struct sock *sk,
563 int level,
564 int optname,
565 char __user *optval,
566 unsigned int optlen);
567 extern int compat_ipv6_getsockopt(struct sock *sk,
568 int level,
569 int optname,
570 char __user *optval,
571 int __user *optlen);
572
573 extern int ip6_datagram_connect(struct sock *sk,
574 struct sockaddr *addr, int addr_len);
575
576 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
577 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
578 u32 info, u8 *payload);
579 extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
580
581 extern int inet6_release(struct socket *sock);
582 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
583 int addr_len);
584 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
585 int *uaddr_len, int peer);
586 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
587 unsigned long arg);
588
589 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
590 struct sock *sk);
591
592 /*
593 * reassembly.c
594 */
595 extern const struct proto_ops inet6_stream_ops;
596 extern const struct proto_ops inet6_dgram_ops;
597
598 struct group_source_req;
599 struct group_filter;
600
601 extern int ip6_mc_source(int add, int omode, struct sock *sk,
602 struct group_source_req *pgsr);
603 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
604 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
605 struct group_filter __user *optval,
606 int __user *optlen);
607 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
608 const struct in6_addr *daddr, u32 rnd);
609
610 #ifdef CONFIG_PROC_FS
611 extern int ac6_proc_init(struct net *net);
612 extern void ac6_proc_exit(struct net *net);
613 extern int raw6_proc_init(void);
614 extern void raw6_proc_exit(void);
615 extern int tcp6_proc_init(struct net *net);
616 extern void tcp6_proc_exit(struct net *net);
617 extern int udp6_proc_init(struct net *net);
618 extern void udp6_proc_exit(struct net *net);
619 extern int udplite6_proc_init(void);
620 extern void udplite6_proc_exit(void);
621 extern int ipv6_misc_proc_init(void);
622 extern void ipv6_misc_proc_exit(void);
623 extern int snmp6_register_dev(struct inet6_dev *idev);
624 extern int snmp6_unregister_dev(struct inet6_dev *idev);
625
626 #else
627 static inline int ac6_proc_init(struct net *net) { return 0; }
628 static inline void ac6_proc_exit(struct net *net) { }
629 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
630 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
631 #endif
632
633 #ifdef CONFIG_SYSCTL
634 extern ctl_table ipv6_route_table_template[];
635 extern ctl_table ipv6_icmp_table_template[];
636
637 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
638 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
639 extern int ipv6_sysctl_register(void);
640 extern void ipv6_sysctl_unregister(void);
641 extern int ipv6_static_sysctl_register(void);
642 extern void ipv6_static_sysctl_unregister(void);
643 #endif
644
645 #endif /* __KERNEL__ */
646 #endif /* _NET_IPV6_H */