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[NETNS][IPV6]: Make the ipv6 sysctl to be a netns subsystem.
[net-next-2.6.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 *
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>
20283d84 20#include <net/if_inet6.h>
1da177e4
LT		 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. */
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
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
98struct frag_hdr {
44473a6b
AV		 99 __u8 nexthdr;
100 __u8 reserved;
101 __be16 frag_off;
102 __be32 identification;
1da177e4
LT		 103};
104
105#define IP6_MF 0x0001
106
107#ifdef __KERNEL__
108
109#include <net/sock.h>
110
111/* sysctls */
112extern int sysctl_ipv6_bindv6only;
113extern int sysctl_mld_max_msf;
114
3d7cc2ba
PE		 115extern struct ctl_path net_ipv6_ctl_path[];
116
14878f75
DS		 117#define _DEVINC(statname, modifier, idev, field) \
118({ \
a11d206d
YH		 119 struct inet6_dev *_idev = (idev); \
120 if (likely(_idev != NULL)) \
14878f75
DS		 121 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
122 SNMP_INC_STATS##modifier(statname##_statistics, (field)); \
a11d206d 123})
14878f75 124
8e7999c4
PE		 125#define _DEVADD(statname, modifier, idev, field, val) \
126({ \
127 struct inet6_dev *_idev = (idev); \
128 if (likely(_idev != NULL)) \
129 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
130 SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\
131})
132
14878f75
DS		 133/* MIBs */
134DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
135
136#define IP6_INC_STATS(idev,field) _DEVINC(ipv6, , idev, field)
137#define IP6_INC_STATS_BH(idev,field) _DEVINC(ipv6, _BH, idev, field)
138#define IP6_INC_STATS_USER(idev,field) _DEVINC(ipv6, _USER, idev, field)
8e7999c4 139#define IP6_ADD_STATS_BH(idev,field,val) _DEVADD(ipv6, _BH, idev, field, val)
14878f75 140
1da177e4 141DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
14878f75
DS		 142DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
143
144#define ICMP6_INC_STATS(idev, field) _DEVINC(icmpv6, , idev, field)
145#define ICMP6_INC_STATS_BH(idev, field) _DEVINC(icmpv6, _BH, idev, field)
146#define ICMP6_INC_STATS_USER(idev, field) _DEVINC(icmpv6, _USER, idev, field)
147
14878f75
DS		 148#define ICMP6MSGOUT_INC_STATS(idev, field) \
149 _DEVINC(icmpv6msg, , idev, field +256)
150#define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
151 _DEVINC(icmpv6msg, _BH, idev, field +256)
152#define ICMP6MSGOUT_INC_STATS_USER(idev, field) \
153 _DEVINC(icmpv6msg, _USER, idev, field +256)
154#define ICMP6MSGIN_INC_STATS(idev, field) \
155 _DEVINC(icmpv6msg, , idev, field)
156#define ICMP6MSGIN_INC_STATS_BH(idev, field) \
157 _DEVINC(icmpv6msg, _BH, idev, field)
158#define ICMP6MSGIN_INC_STATS_USER(idev, field) \
159 _DEVINC(icmpv6msg, _USER, idev, field)
160
1da177e4
LT		 161struct ip6_ra_chain
162{
163 struct ip6_ra_chain *next;
164 struct sock *sk;
165 int sel;
166 void (*destructor)(struct sock *);
167};
168
169extern struct ip6_ra_chain *ip6_ra_chain;
170extern rwlock_t ip6_ra_lock;
171
172/*
173 This structure is prepared by protocol, when parsing
174 ancillary data and passed to IPv6.
175 */
176
177struct ipv6_txoptions
178{
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 */
1da177e4
LT		 190 struct ipv6_opt_hdr *dst1opt;
191
192 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
193};
194
195struct ip6_flowlabel
196{
197 struct ip6_flowlabel *next;
90bcaf7b 198 __be32 label;
db3459d1 199 atomic_t users;
1da177e4
LT		 200 struct in6_addr dst;
201 struct ipv6_txoptions *opt;
1da177e4
LT		 202 unsigned long linger;
203 u8 share;
204 u32 owner;
205 unsigned long lastuse;
206 unsigned long expires;
207};
208
209#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
210#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
211
212struct ipv6_fl_socklist
213{
214 struct ipv6_fl_socklist *next;
215 struct ip6_flowlabel *fl;
216};
217
90bcaf7b 218extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
1da177e4
LT		 219extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
220 struct ip6_flowlabel * fl,
221 struct ipv6_txoptions * fopt);
222extern void fl6_free_socklist(struct sock *sk);
223extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
0a3e78ac 224extern int ip6_flowlabel_init(void);
1da177e4
LT		 225extern void ip6_flowlabel_cleanup(void);
226
227static inline void fl6_sock_release(struct ip6_flowlabel *fl)
228{
229 if (fl)
230 atomic_dec(&fl->users);
231}
232
233extern int ip6_ra_control(struct sock *sk, int sel,
234 void (*destructor)(struct sock *));
235
236
e5bbef20 237extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 238
239extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 240extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
241 int newtype,
242 struct ipv6_opt_hdr __user *newopt,
243 int newoptlen);
df9890c3
YH		 244struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
245 struct ipv6_txoptions *opt);
1da177e4 246
399c07de
ACM		 247extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
248
7eb95156
PE		 249int ip6_frag_nqueues(void);
250int ip6_frag_mem(void);
1da177e4
LT		 251
252#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
253
254/*
255 * Function prototype for build_xmit
256 */
257
258typedef int (*inet_getfrag_t) (const void *data,
259 struct in6_addr *addr,
260 char *,
261 unsigned int, unsigned int);
262
b1cacb68
YH		 263extern int __ipv6_addr_type(const struct in6_addr *addr);
264static inline int ipv6_addr_type(const struct in6_addr *addr)
265{
266 return __ipv6_addr_type(addr) & 0xffff;
267}
1da177e4
LT		 268
269static inline int ipv6_addr_scope(const struct in6_addr *addr)
270{
b1cacb68
YH		 271 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
272}
273
274static inline int __ipv6_addr_src_scope(int type)
275{
276 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
277}
278
279static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
280{
281 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 282}
283
284static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
285{
db3459d1 286 return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 287}
288
f2ffd9ee
PM		 289static inline int
290ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
291 const struct in6_addr *a2)
292{
293 unsigned int i;
294
295 for (i = 0; i < 4; i++)
296 if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
297 return 1;
298 return 0;
299}
300
1da177e4
LT		 301static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
302{
db3459d1 303 memcpy(a1, a2, sizeof(struct in6_addr));
1da177e4
LT		 304}
305
306static inline void ipv6_addr_prefix(struct in6_addr *pfx,
307 const struct in6_addr *addr,
308 int plen)
309{
310 /* caller must guarantee 0 <= plen <= 128 */
311 int o = plen >> 3,
312 b = plen & 0x7;
313
db3459d1 314 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4 315 memcpy(pfx->s6_addr, addr, o);
db3459d1 316 if (b != 0)
1da177e4 317 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4
LT		 318}
319
1da177e4 320static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82
AV		 321 __be32 w1, __be32 w2,
322 __be32 w3, __be32 w4)
1da177e4
LT		 323{
324 addr->s6_addr32[0] = w1;
325 addr->s6_addr32[1] = w2;
326 addr->s6_addr32[2] = w3;
327 addr->s6_addr32[3] = w4;
328}
1da177e4
LT		 329
330static inline int ipv6_addr_equal(const struct in6_addr *a1,
331 const struct in6_addr *a2)
332{
333 return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
334 a1->s6_addr32[1] == a2->s6_addr32[1] &&
335 a1->s6_addr32[2] == a2->s6_addr32[2] &&
336 a1->s6_addr32[3] == a2->s6_addr32[3]);
337}
338
48818f82 339static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
1da177e4
LT		 340 unsigned int prefixlen)
341{
342 unsigned pdw, pbi;
343
344 /* check complete u32 in prefix */
345 pdw = prefixlen >> 5;
346 if (pdw && memcmp(a1, a2, pdw << 2))
347 return 0;
348
349 /* check incomplete u32 in prefix */
350 pbi = prefixlen & 0x1f;
351 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
352 return 0;
353
354 return 1;
355}
356
357static inline int ipv6_prefix_equal(const struct in6_addr *a1,
358 const struct in6_addr *a2,
359 unsigned int prefixlen)
360{
361 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
362 prefixlen);
363}
364
2588fe1d 365struct inet_frag_queue;
2588fe1d 366
c6fda282
PE		 367struct ip6_create_arg {
368 __be32 id;
369 struct in6_addr *src;
370 struct in6_addr *dst;
371};
372
373void ip6_frag_init(struct inet_frag_queue *q, void *a);
abd6523d 374int ip6_frag_match(struct inet_frag_queue *q, void *a);
c6fda282 375
1da177e4
LT		 376static inline int ipv6_addr_any(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] ) == 0);
380}
381
e773e4fa
BH		 382static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
383{
384 return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 &&
385 a->s6_addr32[2] == htonl(0x0000ffff));
386}
387
971f359d
YH		 388/*
389 * find the first different bit between two addresses
390 * length of address must be a multiple of 32bits
391 */
392static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
393{
ef296f56 394 const __be32 *a1 = token1, *a2 = token2;
971f359d
YH		 395 int i;
396
397 addrlen >>= 2;
398
399 for (i = 0; i < addrlen; i++) {
ef296f56
AV		 400 __be32 xb = a1[i] ^ a2[i];
401 if (xb)
402 return i * 32 + 32 - fls(ntohl(xb));
971f359d
YH		 403 }
404
405 /*
406 * we should *never* get to this point since that
407 * would mean the addrs are equal
408 *
409 * However, we do get to it 8) And exacly, when
410 * addresses are equal 8)
411 *
412 * ip route add 1111::/128 via ...
413 * ip route add 1111::/64 via ...
414 * and we are here.
415 *
416 * Ideally, this function should stop comparison
417 * at prefix length. It does not, but it is still OK,
418 * if returned value is greater than prefix length.
419 * --ANK (980803)
420 */
421 return (addrlen << 5);
422}
423
424static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
425{
426 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
427}
428
1da177e4
LT		 429/*
430 * Prototypes exported by ipv6
431 */
432
433/*
434 * rcv function (called from netdevice level)
435 */
436
437extern int ipv6_rcv(struct sk_buff *skb,
438 struct net_device *dev,
f2ccd8fa
DM		 439 struct packet_type *pt,
440 struct net_device *orig_dev);
1da177e4 441
b05e1066
PM		 442extern int ip6_rcv_finish(struct sk_buff *skb);
443
1da177e4
LT		 444/*
445 * upper-layer output functions
446 */
447extern int ip6_xmit(struct sock *sk,
448 struct sk_buff *skb,
449 struct flowi *fl,
450 struct ipv6_txoptions *opt,
451 int ipfragok);
452
453extern int ip6_nd_hdr(struct sock *sk,
454 struct sk_buff *skb,
455 struct net_device *dev,
456 struct in6_addr *saddr,
457 struct in6_addr *daddr,
458 int proto, int len);
459
460extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
461
462extern int ip6_append_data(struct sock *sk,
463 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
464 void *from,
465 int length,
466 int transhdrlen,
467 int hlimit,
41a1f8ea 468 int tclass,
1da177e4
LT		 469 struct ipv6_txoptions *opt,
470 struct flowi *fl,
471 struct rt6_info *rt,
472 unsigned int flags);
473
474extern int ip6_push_pending_frames(struct sock *sk);
475
476extern void ip6_flush_pending_frames(struct sock *sk);
477
478extern int ip6_dst_lookup(struct sock *sk,
479 struct dst_entry **dst,
480 struct flowi *fl);
14e50e57
DM		 481extern int ip6_dst_blackhole(struct sock *sk,
482 struct dst_entry **dst,
483 struct flowi *fl);
497c615a
HX		 484extern int ip6_sk_dst_lookup(struct sock *sk,
485 struct dst_entry **dst,
486 struct flowi *fl);
1da177e4
LT		 487
488/*
489 * skb processing functions
490 */
491
492extern int ip6_output(struct sk_buff *skb);
493extern int ip6_forward(struct sk_buff *skb);
494extern int ip6_input(struct sk_buff *skb);
495extern int ip6_mc_input(struct sk_buff *skb);
496
ef76bc23
HX		 497extern int __ip6_local_out(struct sk_buff *skb);
498extern int ip6_local_out(struct sk_buff *skb);
499
1da177e4
LT		 500/*
501 * Extension header (options) processing
502 */
503
504extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
505 u8 *prev_hdr,
506 struct ipv6_txoptions *opt,
507 struct in6_addr *daddr,
508 u32 jumbolen);
509extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
510 u8 *prev_hdr,
511 struct ipv6_txoptions *opt);
512extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
513 struct ipv6_txoptions *opt,
514 u8 *proto,
515 struct in6_addr **daddr_p);
516extern void ipv6_push_frag_opts(struct sk_buff *skb,
517 struct ipv6_txoptions *opt,
518 u8 *proto);
519
520extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
0d3d077c 521 u8 *nexthdrp);
1da177e4
LT		 522
523extern int ipv6_ext_hdr(u8 nexthdr);
524
c61a4043
MN		 525extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
526
1da177e4
LT		 527/*
528 * socket options (ipv6_sockglue.c)
529 */
530
531extern int ipv6_setsockopt(struct sock *sk, int level,
532 int optname,
533 char __user *optval,
534 int optlen);
535extern int ipv6_getsockopt(struct sock *sk, int level,
536 int optname,
537 char __user *optval,
538 int __user *optlen);
3fdadf7d
DM		 539extern int compat_ipv6_setsockopt(struct sock *sk,
540 int level,
541 int optname,
542 char __user *optval,
543 int optlen);
544extern int compat_ipv6_getsockopt(struct sock *sk,
545 int level,
546 int optname,
547 char __user *optval,
548 int __user *optlen);
1da177e4 549
7f4e4868 550extern int ipv6_packet_init(void);
1da177e4
LT		 551
552extern void ipv6_packet_cleanup(void);
553
554extern int ip6_datagram_connect(struct sock *sk,
555 struct sockaddr *addr, int addr_len);
556
557extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
e69a4adc 558extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
1da177e4
LT		 559 u32 info, u8 *payload);
560extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
561
562extern int inet6_release(struct socket *sock);
563extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
564 int addr_len);
565extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
566 int *uaddr_len, int peer);
567extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
568 unsigned long arg);
569
d8313f5c
ACM		 570extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
571 struct sock *sk);
572
1da177e4
LT		 573/*
574 * reassembly.c
575 */
04128f23
PE		 576struct inet_frags_ctl;
577extern struct inet_frags_ctl ip6_frags_ctl;
1da177e4 578
90ddc4f0
ED		 579extern const struct proto_ops inet6_stream_ops;
580extern const struct proto_ops inet6_dgram_ops;
20380731 581
14c85021
ACM		 582struct group_source_req;
583struct group_filter;
584
20380731
ACM		 585extern int ip6_mc_source(int add, int omode, struct sock *sk,
586 struct group_source_req *pgsr);
587extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
588extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
589 struct group_filter __user *optval,
590 int __user *optlen);
591
592#ifdef CONFIG_PROC_FS
593extern int ac6_proc_init(void);
594extern void ac6_proc_exit(void);
595extern int raw6_proc_init(void);
596extern void raw6_proc_exit(void);
597extern int tcp6_proc_init(void);
598extern void tcp6_proc_exit(void);
599extern int udp6_proc_init(void);
600extern void udp6_proc_exit(void);
ba4e58ec
GR		 601extern int udplite6_proc_init(void);
602extern void udplite6_proc_exit(void);
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ACM		 603extern int ipv6_misc_proc_init(void);
604extern void ipv6_misc_proc_exit(void);
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HX		 605extern int snmp6_register_dev(struct inet6_dev *idev);
606extern int snmp6_unregister_dev(struct inet6_dev *idev);
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ACM		 607
608extern struct rt6_statistics rt6_stats;
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HX		 609#else
610static inline int snmp6_register_dev(struct inet6_dev *idev)
611{
612 return 0;
613}
614
615static inline int snmp6_unregister_dev(struct inet6_dev *idev)
616{
617 return 0;
618}
20380731 619#endif
1da177e4 620
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ACM		 621#ifdef CONFIG_SYSCTL
622extern ctl_table ipv6_route_table[];
623extern ctl_table ipv6_icmp_table[];
1da177e4 624
291480c0 625extern int ipv6_sysctl_register(void);
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ACM		 626extern void ipv6_sysctl_unregister(void);
627#endif
1da177e4 628
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ACM		 629#endif /* __KERNEL__ */
630#endif /* _NET_IPV6_H */
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