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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / include / net / ipv6.h
bloba366a8a1fe2380e92ce604a21d44e8e598e484f4
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
77 /*
78 * Addr scopes
79 */
80 #define IPV6_ADDR_MC_SCOPE(a) \
81 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
82 #define __IPV6_ADDR_SCOPE_INVALID -1
83 #define IPV6_ADDR_SCOPE_NODELOCAL 0x01
84 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
85 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05
86 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
87 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e
88
89 /*
90 * Addr flags
91 */
92 #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
93 ((a)->s6_addr[1] & 0x10)
94 #define IPV6_ADDR_MC_FLAG_PREFIX(a) \
95 ((a)->s6_addr[1] & 0x20)
96 #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
97 ((a)->s6_addr[1] & 0x40)
98
99 /*
100 * fragmentation header
101 */
102
103 struct frag_hdr {
104 __u8 nexthdr;
105 __u8 reserved;
106 __be16 frag_off;
107 __be32 identification;
108 };
109
110 #define IP6_MF 0x0001
111
112 #include <net/sock.h>
113
114 /* sysctls */
115 extern int sysctl_mld_max_msf;
116 extern struct ctl_path net_ipv6_ctl_path[];
117
118 #define _DEVINC(net, statname, modifier, idev, field) \
119 ({ \
120 struct inet6_dev *_idev = (idev); \
121 if (likely(_idev != NULL)) \
122 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
123 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
124 })
125
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
135 #define _DEVADD(net, statname, modifier, idev, field, val) \
136 ({ \
137 struct inet6_dev *_idev = (idev); \
138 if (likely(_idev != NULL)) \
139 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
140 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
141 })
142
143 #define _DEVUPD(net, statname, modifier, idev, field, val) \
144 ({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
148 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
149 })
150
151 /* MIBs */
152
153 #define IP6_INC_STATS(net, idev,field) \
154 _DEVINC(net, ipv6, 64, idev, field)
155 #define IP6_INC_STATS_BH(net, idev,field) \
156 _DEVINC(net, ipv6, 64_BH, idev, field)
157 #define IP6_ADD_STATS(net, idev,field,val) \
158 _DEVADD(net, ipv6, 64, idev, field, val)
159 #define IP6_ADD_STATS_BH(net, idev,field,val) \
160 _DEVADD(net, ipv6, 64_BH, idev, field, val)
161 #define IP6_UPD_PO_STATS(net, idev,field,val) \
162 _DEVUPD(net, ipv6, 64, idev, field, val)
163 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
164 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
165 #define ICMP6_INC_STATS(net, idev, field) \
166 _DEVINCATOMIC(net, icmpv6, , idev, field)
167 #define ICMP6_INC_STATS_BH(net, idev, field) \
168 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
169
170 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \
171 _DEVINCATOMIC(net, icmpv6msg, , idev, field +256)
172 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
173 _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field +256)
174 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
175 _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field)
176
177 struct ip6_ra_chain {
178 struct ip6_ra_chain *next;
179 struct sock *sk;
180 int sel;
181 void (*destructor)(struct sock *);
182 };
183
184 extern struct ip6_ra_chain *ip6_ra_chain;
185 extern rwlock_t ip6_ra_lock;
186
187 /*
188 This structure is prepared by protocol, when parsing
189 ancillary data and passed to IPv6.
190 */
191
192 struct ipv6_txoptions {
193 /* Length of this structure */
194 int tot_len;
195
196 /* length of extension headers */
197
198 __u16 opt_flen; /* after fragment hdr */
199 __u16 opt_nflen; /* before fragment hdr */
200
201 struct ipv6_opt_hdr *hopopt;
202 struct ipv6_opt_hdr *dst0opt;
203 struct ipv6_rt_hdr *srcrt; /* Routing Header */
204 struct ipv6_opt_hdr *dst1opt;
205
206 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
207 };
208
209 struct ip6_flowlabel {
210 struct ip6_flowlabel *next;
211 __be32 label;
212 atomic_t users;
213 struct in6_addr dst;
214 struct ipv6_txoptions *opt;
215 unsigned long linger;
216 u8 share;
217 u32 owner;
218 unsigned long lastuse;
219 unsigned long expires;
220 struct net *fl_net;
221 };
222
223 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
224 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
225
226 struct ipv6_fl_socklist {
227 struct ipv6_fl_socklist *next;
228 struct ip6_flowlabel *fl;
229 };
230
231 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
232 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
233 struct ip6_flowlabel * fl,
234 struct ipv6_txoptions * fopt);
235 extern void fl6_free_socklist(struct sock *sk);
236 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
237 extern int ip6_flowlabel_init(void);
238 extern void ip6_flowlabel_cleanup(void);
239
240 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
241 {
242 if (fl)
243 atomic_dec(&fl->users);
244 }
245
246 extern int ip6_ra_control(struct sock *sk, int sel);
247
248 extern int ipv6_parse_hopopts(struct sk_buff *skb);
249
250 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
251 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
252 int newtype,
253 struct ipv6_opt_hdr __user *newopt,
254 int newoptlen);
255 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
256 struct ipv6_txoptions *opt);
257
258 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
259
260 int ip6_frag_nqueues(struct net *net);
261 int ip6_frag_mem(struct net *net);
262
263 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
264 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
265 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
266
267 extern int __ipv6_addr_type(const struct in6_addr *addr);
268 static inline int ipv6_addr_type(const struct in6_addr *addr)
269 {
270 return __ipv6_addr_type(addr) & 0xffff;
271 }
272
273 static inline int ipv6_addr_scope(const struct in6_addr *addr)
274 {
275 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
276 }
277
278 static inline int __ipv6_addr_src_scope(int type)
279 {
280 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
281 }
282
283 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
284 {
285 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
286 }
287
288 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
289 {
290 return memcmp(a1, a2, sizeof(struct in6_addr));
291 }
292
293 static inline int
294 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
295 const struct in6_addr *a2)
296 {
297 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
298 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
299 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
300 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
301 }
302
303 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
304 {
305 memcpy(a1, a2, sizeof(struct in6_addr));
306 }
307
308 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
309 const struct in6_addr *addr,
310 int plen)
311 {
312 /* caller must guarantee 0 <= plen <= 128 */
313 int o = plen >> 3,
314 b = plen & 0x7;
315
316 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
317 memcpy(pfx->s6_addr, addr, o);
318 if (b != 0)
319 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
320 }
321
322 static inline void ipv6_addr_set(struct in6_addr *addr,
323 __be32 w1, __be32 w2,
324 __be32 w3, __be32 w4)
325 {
326 addr->s6_addr32[0] = w1;
327 addr->s6_addr32[1] = w2;
328 addr->s6_addr32[2] = w3;
329 addr->s6_addr32[3] = w4;
330 }
331
332 static inline int ipv6_addr_equal(const struct in6_addr *a1,
333 const struct in6_addr *a2)
334 {
335 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
336 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
337 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
338 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
339 }
340
341 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
342 unsigned int prefixlen)
343 {
344 unsigned pdw, pbi;
345
346 /* check complete u32 in prefix */
347 pdw = prefixlen >> 5;
348 if (pdw && memcmp(a1, a2, pdw << 2))
349 return 0;
350
351 /* check incomplete u32 in prefix */
352 pbi = prefixlen & 0x1f;
353 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
354 return 0;
355
356 return 1;
357 }
358
359 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
360 const struct in6_addr *a2,
361 unsigned int prefixlen)
362 {
363 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
364 prefixlen);
365 }
366
367 struct inet_frag_queue;
368
369 enum ip6_defrag_users {
370 IP6_DEFRAG_LOCAL_DELIVER,
371 IP6_DEFRAG_CONNTRACK_IN,
372 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
373 IP6_DEFRAG_CONNTRACK_OUT,
374 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
375 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
376 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
377 };
378
379 struct ip6_create_arg {
380 __be32 id;
381 u32 user;
382 const struct in6_addr *src;
383 const struct in6_addr *dst;
384 };
385
386 void ip6_frag_init(struct inet_frag_queue *q, void *a);
387 int ip6_frag_match(struct inet_frag_queue *q, void *a);
388
389 static inline int ipv6_addr_any(const struct in6_addr *a)
390 {
391 return (a->s6_addr32[0] | a->s6_addr32[1] |
392 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
393 }
394
395 static inline int ipv6_addr_loopback(const struct in6_addr *a)
396 {
397 return (a->s6_addr32[0] | a->s6_addr32[1] |
398 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
399 }
400
401 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
402 {
403 return (a->s6_addr32[0] | a->s6_addr32[1] |
404 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
405 }
406
407 /*
408 * Check for a RFC 4843 ORCHID address
409 * (Overlay Routable Cryptographic Hash Identifiers)
410 */
411 static inline int ipv6_addr_orchid(const struct in6_addr *a)
412 {
413 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
414 }
415
416 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
417 struct in6_addr *v4mapped)
418 {
419 ipv6_addr_set(v4mapped,
420 0, 0,
421 htonl(0x0000FFFF),
422 addr);
423 }
424
425 /*
426 * find the first different bit between two addresses
427 * length of address must be a multiple of 32bits
428 */
429 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
430 {
431 const __be32 *a1 = token1, *a2 = token2;
432 int i;
433
434 addrlen >>= 2;
435
436 for (i = 0; i < addrlen; i++) {
437 __be32 xb = a1[i] ^ a2[i];
438 if (xb)
439 return i * 32 + 31 - __fls(ntohl(xb));
440 }
441
442 /*
443 * we should *never* get to this point since that
444 * would mean the addrs are equal
445 *
446 * However, we do get to it 8) And exacly, when
447 * addresses are equal 8)
448 *
449 * ip route add 1111::/128 via ...
450 * ip route add 1111::/64 via ...
451 * and we are here.
452 *
453 * Ideally, this function should stop comparison
454 * at prefix length. It does not, but it is still OK,
455 * if returned value is greater than prefix length.
456 * --ANK (980803)
457 */
458 return addrlen << 5;
459 }
460
461 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
462 {
463 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
464 }
465
466 extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
467
468 /*
469 * Prototypes exported by ipv6
470 */
471
472 /*
473 * rcv function (called from netdevice level)
474 */
475
476 extern int ipv6_rcv(struct sk_buff *skb,
477 struct net_device *dev,
478 struct packet_type *pt,
479 struct net_device *orig_dev);
480
481 extern int ip6_rcv_finish(struct sk_buff *skb);
482
483 /*
484 * upper-layer output functions
485 */
486 extern int ip6_xmit(struct sock *sk,
487 struct sk_buff *skb,
488 struct flowi6 *fl6,
489 struct ipv6_txoptions *opt,
490 int tclass);
491
492 extern int ip6_nd_hdr(struct sock *sk,
493 struct sk_buff *skb,
494 struct net_device *dev,
495 const struct in6_addr *saddr,
496 const struct in6_addr *daddr,
497 int proto, int len);
498
499 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
500
501 extern int ip6_append_data(struct sock *sk,
502 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
503 void *from,
504 int length,
505 int transhdrlen,
506 int hlimit,
507 int tclass,
508 struct ipv6_txoptions *opt,
509 struct flowi6 *fl6,
510 struct rt6_info *rt,
511 unsigned int flags,
512 int dontfrag);
513
514 extern int ip6_push_pending_frames(struct sock *sk);
515
516 extern void ip6_flush_pending_frames(struct sock *sk);
517
518 extern int ip6_dst_lookup(struct sock *sk,
519 struct dst_entry **dst,
520 struct flowi6 *fl6);
521 extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
522 struct flowi6 *fl6,
523 const struct in6_addr *final_dst,
524 bool can_sleep);
525 extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
526 struct flowi6 *fl6,
527 const struct in6_addr *final_dst,
528 bool can_sleep);
529 extern struct dst_entry * ip6_blackhole_route(struct net *net,
530 struct dst_entry *orig_dst);
531
532 /*
533 * skb processing functions
534 */
535
536 extern int ip6_output(struct sk_buff *skb);
537 extern int ip6_forward(struct sk_buff *skb);
538 extern int ip6_input(struct sk_buff *skb);
539 extern int ip6_mc_input(struct sk_buff *skb);
540
541 extern int __ip6_local_out(struct sk_buff *skb);
542 extern int ip6_local_out(struct sk_buff *skb);
543
544 /*
545 * Extension header (options) processing
546 */
547
548 extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
549 struct ipv6_txoptions *opt,
550 u8 *proto,
551 struct in6_addr **daddr_p);
552 extern void ipv6_push_frag_opts(struct sk_buff *skb,
553 struct ipv6_txoptions *opt,
554 u8 *proto);
555
556 extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
557 u8 *nexthdrp);
558
559 extern int ipv6_ext_hdr(u8 nexthdr);
560
561 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
562
563 extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
564 const struct ipv6_txoptions *opt,
565 struct in6_addr *orig);
566
567 /*
568 * socket options (ipv6_sockglue.c)
569 */
570
571 extern int ipv6_setsockopt(struct sock *sk, int level,
572 int optname,
573 char __user *optval,
574 unsigned int optlen);
575 extern int ipv6_getsockopt(struct sock *sk, int level,
576 int optname,
577 char __user *optval,
578 int __user *optlen);
579 extern int compat_ipv6_setsockopt(struct sock *sk,
580 int level,
581 int optname,
582 char __user *optval,
583 unsigned int optlen);
584 extern int compat_ipv6_getsockopt(struct sock *sk,
585 int level,
586 int optname,
587 char __user *optval,
588 int __user *optlen);
589
590 extern int ip6_datagram_connect(struct sock *sk,
591 struct sockaddr *addr, int addr_len);
592
593 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
594 extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
595 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
596 u32 info, u8 *payload);
597 extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
598 extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
599
600 extern int inet6_release(struct socket *sock);
601 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
602 int addr_len);
603 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
604 int *uaddr_len, int peer);
605 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
606 unsigned long arg);
607
608 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
609 struct sock *sk);
610
611 /*
612 * reassembly.c
613 */
614 extern const struct proto_ops inet6_stream_ops;
615 extern const struct proto_ops inet6_dgram_ops;
616
617 struct group_source_req;
618 struct group_filter;
619
620 extern int ip6_mc_source(int add, int omode, struct sock *sk,
621 struct group_source_req *pgsr);
622 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
623 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
624 struct group_filter __user *optval,
625 int __user *optlen);
626 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
627 const struct in6_addr *daddr, u32 rnd);
628
629 #ifdef CONFIG_PROC_FS
630 extern int ac6_proc_init(struct net *net);
631 extern void ac6_proc_exit(struct net *net);
632 extern int raw6_proc_init(void);
633 extern void raw6_proc_exit(void);
634 extern int tcp6_proc_init(struct net *net);
635 extern void tcp6_proc_exit(struct net *net);
636 extern int udp6_proc_init(struct net *net);
637 extern void udp6_proc_exit(struct net *net);
638 extern int udplite6_proc_init(void);
639 extern void udplite6_proc_exit(void);
640 extern int ipv6_misc_proc_init(void);
641 extern void ipv6_misc_proc_exit(void);
642 extern int snmp6_register_dev(struct inet6_dev *idev);
643 extern int snmp6_unregister_dev(struct inet6_dev *idev);
644
645 #else
646 static inline int ac6_proc_init(struct net *net) { return 0; }
647 static inline void ac6_proc_exit(struct net *net) { }
648 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
649 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
650 #endif
651
652 #ifdef CONFIG_SYSCTL
653 extern ctl_table ipv6_route_table_template[];
654 extern ctl_table ipv6_icmp_table_template[];
655
656 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
657 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
658 extern int ipv6_sysctl_register(void);
659 extern void ipv6_sysctl_unregister(void);
660 extern int ipv6_static_sysctl_register(void);
661 extern void ipv6_static_sysctl_unregister(void);
662 #endif
663
664 #endif /* _NET_IPV6_H */
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