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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / include / net / ipv6.h
blobe4170a22fc6f12325d6757f07cf7430d1fbcbff3
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 /* per device and per net counters are atomic_long_t */
136 #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
137 ({ \
138 struct inet6_dev *_idev = (idev); \
139 if (likely(_idev != NULL)) \
140 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
141 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
142 })
143
144 #define _DEVADD(net, statname, modifier, idev, field, val) \
145 ({ \
146 struct inet6_dev *_idev = (idev); \
147 if (likely(_idev != NULL)) \
148 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
149 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
150 })
151
152 #define _DEVUPD(net, statname, modifier, idev, field, val) \
153 ({ \
154 struct inet6_dev *_idev = (idev); \
155 if (likely(_idev != NULL)) \
156 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
157 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
158 })
159
160 /* MIBs */
161
162 #define IP6_INC_STATS(net, idev,field) \
163 _DEVINC(net, ipv6, 64, idev, field)
164 #define IP6_INC_STATS_BH(net, idev,field) \
165 _DEVINC(net, ipv6, 64_BH, idev, field)
166 #define IP6_ADD_STATS(net, idev,field,val) \
167 _DEVADD(net, ipv6, 64, idev, field, val)
168 #define IP6_ADD_STATS_BH(net, idev,field,val) \
169 _DEVADD(net, ipv6, 64_BH, idev, field, val)
170 #define IP6_UPD_PO_STATS(net, idev,field,val) \
171 _DEVUPD(net, ipv6, 64, idev, field, val)
172 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
173 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
174 #define ICMP6_INC_STATS(net, idev, field) \
175 _DEVINCATOMIC(net, icmpv6, , idev, field)
176 #define ICMP6_INC_STATS_BH(net, idev, field) \
177 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
178
179 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \
180 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
181 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
182 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
183 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
184 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
185
186 struct ip6_ra_chain {
187 struct ip6_ra_chain *next;
188 struct sock *sk;
189 int sel;
190 void (*destructor)(struct sock *);
191 };
192
193 extern struct ip6_ra_chain *ip6_ra_chain;
194 extern rwlock_t ip6_ra_lock;
195
196 /*
197 This structure is prepared by protocol, when parsing
198 ancillary data and passed to IPv6.
199 */
200
201 struct ipv6_txoptions {
202 /* Length of this structure */
203 int tot_len;
204
205 /* length of extension headers */
206
207 __u16 opt_flen; /* after fragment hdr */
208 __u16 opt_nflen; /* before fragment hdr */
209
210 struct ipv6_opt_hdr *hopopt;
211 struct ipv6_opt_hdr *dst0opt;
212 struct ipv6_rt_hdr *srcrt; /* Routing Header */
213 struct ipv6_opt_hdr *dst1opt;
214
215 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
216 };
217
218 struct ip6_flowlabel {
219 struct ip6_flowlabel *next;
220 __be32 label;
221 atomic_t users;
222 struct in6_addr dst;
223 struct ipv6_txoptions *opt;
224 unsigned long linger;
225 u8 share;
226 u32 owner;
227 unsigned long lastuse;
228 unsigned long expires;
229 struct net *fl_net;
230 };
231
232 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
233 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
234
235 struct ipv6_fl_socklist {
236 struct ipv6_fl_socklist *next;
237 struct ip6_flowlabel *fl;
238 };
239
240 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
241 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
242 struct ip6_flowlabel * fl,
243 struct ipv6_txoptions * fopt);
244 extern void fl6_free_socklist(struct sock *sk);
245 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
246 extern int ip6_flowlabel_init(void);
247 extern void ip6_flowlabel_cleanup(void);
248
249 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
250 {
251 if (fl)
252 atomic_dec(&fl->users);
253 }
254
255 extern int ip6_ra_control(struct sock *sk, int sel);
256
257 extern int ipv6_parse_hopopts(struct sk_buff *skb);
258
259 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
260 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
261 int newtype,
262 struct ipv6_opt_hdr __user *newopt,
263 int newoptlen);
264 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
265 struct ipv6_txoptions *opt);
266
267 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
268
269 int ip6_frag_nqueues(struct net *net);
270 int ip6_frag_mem(struct net *net);
271
272 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
273 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
274 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
275
276 extern int __ipv6_addr_type(const struct in6_addr *addr);
277 static inline int ipv6_addr_type(const struct in6_addr *addr)
278 {
279 return __ipv6_addr_type(addr) & 0xffff;
280 }
281
282 static inline int ipv6_addr_scope(const struct in6_addr *addr)
283 {
284 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
285 }
286
287 static inline int __ipv6_addr_src_scope(int type)
288 {
289 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
290 }
291
292 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
293 {
294 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
295 }
296
297 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
298 {
299 return memcmp(a1, a2, sizeof(struct in6_addr));
300 }
301
302 static inline int
303 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
304 const struct in6_addr *a2)
305 {
306 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
307 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
308 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
309 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
310 }
311
312 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
313 const struct in6_addr *addr,
314 int plen)
315 {
316 /* caller must guarantee 0 <= plen <= 128 */
317 int o = plen >> 3,
318 b = plen & 0x7;
319
320 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
321 memcpy(pfx->s6_addr, addr, o);
322 if (b != 0)
323 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
324 }
325
326 static inline void ipv6_addr_set(struct in6_addr *addr,
327 __be32 w1, __be32 w2,
328 __be32 w3, __be32 w4)
329 {
330 addr->s6_addr32[0] = w1;
331 addr->s6_addr32[1] = w2;
332 addr->s6_addr32[2] = w3;
333 addr->s6_addr32[3] = w4;
334 }
335
336 static inline int ipv6_addr_equal(const struct in6_addr *a1,
337 const struct in6_addr *a2)
338 {
339 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
340 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
341 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
342 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
343 }
344
345 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
346 unsigned int prefixlen)
347 {
348 unsigned pdw, pbi;
349
350 /* check complete u32 in prefix */
351 pdw = prefixlen >> 5;
352 if (pdw && memcmp(a1, a2, pdw << 2))
353 return 0;
354
355 /* check incomplete u32 in prefix */
356 pbi = prefixlen & 0x1f;
357 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
358 return 0;
359
360 return 1;
361 }
362
363 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
364 const struct in6_addr *a2,
365 unsigned int prefixlen)
366 {
367 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
368 prefixlen);
369 }
370
371 struct inet_frag_queue;
372
373 enum ip6_defrag_users {
374 IP6_DEFRAG_LOCAL_DELIVER,
375 IP6_DEFRAG_CONNTRACK_IN,
376 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
377 IP6_DEFRAG_CONNTRACK_OUT,
378 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
379 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
380 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
381 };
382
383 struct ip6_create_arg {
384 __be32 id;
385 u32 user;
386 const struct in6_addr *src;
387 const struct in6_addr *dst;
388 };
389
390 void ip6_frag_init(struct inet_frag_queue *q, void *a);
391 int ip6_frag_match(struct inet_frag_queue *q, void *a);
392
393 static inline int ipv6_addr_any(const struct in6_addr *a)
394 {
395 return (a->s6_addr32[0] | a->s6_addr32[1] |
396 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
397 }
398
399 static inline int ipv6_addr_loopback(const struct in6_addr *a)
400 {
401 return (a->s6_addr32[0] | a->s6_addr32[1] |
402 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
403 }
404
405 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
406 {
407 return (a->s6_addr32[0] | a->s6_addr32[1] |
408 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
409 }
410
411 /*
412 * Check for a RFC 4843 ORCHID address
413 * (Overlay Routable Cryptographic Hash Identifiers)
414 */
415 static inline int ipv6_addr_orchid(const struct in6_addr *a)
416 {
417 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
418 }
419
420 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
421 struct in6_addr *v4mapped)
422 {
423 ipv6_addr_set(v4mapped,
424 0, 0,
425 htonl(0x0000FFFF),
426 addr);
427 }
428
429 /*
430 * find the first different bit between two addresses
431 * length of address must be a multiple of 32bits
432 */
433 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
434 {
435 const __be32 *a1 = token1, *a2 = token2;
436 int i;
437
438 addrlen >>= 2;
439
440 for (i = 0; i < addrlen; i++) {
441 __be32 xb = a1[i] ^ a2[i];
442 if (xb)
443 return i * 32 + 31 - __fls(ntohl(xb));
444 }
445
446 /*
447 * we should *never* get to this point since that
448 * would mean the addrs are equal
449 *
450 * However, we do get to it 8) And exacly, when
451 * addresses are equal 8)
452 *
453 * ip route add 1111::/128 via ...
454 * ip route add 1111::/64 via ...
455 * and we are here.
456 *
457 * Ideally, this function should stop comparison
458 * at prefix length. It does not, but it is still OK,
459 * if returned value is greater than prefix length.
460 * --ANK (980803)
461 */
462 return addrlen << 5;
463 }
464
465 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
466 {
467 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
468 }
469
470 extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
471
472 /*
473 * Prototypes exported by ipv6
474 */
475
476 /*
477 * rcv function (called from netdevice level)
478 */
479
480 extern int ipv6_rcv(struct sk_buff *skb,
481 struct net_device *dev,
482 struct packet_type *pt,
483 struct net_device *orig_dev);
484
485 extern int ip6_rcv_finish(struct sk_buff *skb);
486
487 /*
488 * upper-layer output functions
489 */
490 extern int ip6_xmit(struct sock *sk,
491 struct sk_buff *skb,
492 struct flowi6 *fl6,
493 struct ipv6_txoptions *opt,
494 int tclass);
495
496 extern int ip6_nd_hdr(struct sock *sk,
497 struct sk_buff *skb,
498 struct net_device *dev,
499 const struct in6_addr *saddr,
500 const struct in6_addr *daddr,
501 int proto, int len);
502
503 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
504
505 extern int ip6_append_data(struct sock *sk,
506 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
507 void *from,
508 int length,
509 int transhdrlen,
510 int hlimit,
511 int tclass,
512 struct ipv6_txoptions *opt,
513 struct flowi6 *fl6,
514 struct rt6_info *rt,
515 unsigned int flags,
516 int dontfrag);
517
518 extern int ip6_push_pending_frames(struct sock *sk);
519
520 extern void ip6_flush_pending_frames(struct sock *sk);
521
522 extern int ip6_dst_lookup(struct sock *sk,
523 struct dst_entry **dst,
524 struct flowi6 *fl6);
525 extern struct dst_entry * ip6_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_sk_dst_lookup_flow(struct sock *sk,
530 struct flowi6 *fl6,
531 const struct in6_addr *final_dst,
532 bool can_sleep);
533 extern struct dst_entry * ip6_blackhole_route(struct net *net,
534 struct dst_entry *orig_dst);
535
536 /*
537 * skb processing functions
538 */
539
540 extern int ip6_output(struct sk_buff *skb);
541 extern int ip6_forward(struct sk_buff *skb);
542 extern int ip6_input(struct sk_buff *skb);
543 extern int ip6_mc_input(struct sk_buff *skb);
544
545 extern int __ip6_local_out(struct sk_buff *skb);
546 extern int ip6_local_out(struct sk_buff *skb);
547
548 /*
549 * Extension header (options) processing
550 */
551
552 extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
553 struct ipv6_txoptions *opt,
554 u8 *proto,
555 struct in6_addr **daddr_p);
556 extern void ipv6_push_frag_opts(struct sk_buff *skb,
557 struct ipv6_txoptions *opt,
558 u8 *proto);
559
560 extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
561 u8 *nexthdrp, __be16 *frag_offp);
562
563 extern int ipv6_ext_hdr(u8 nexthdr);
564
565 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
566
567 extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
568 const struct ipv6_txoptions *opt,
569 struct in6_addr *orig);
570
571 /*
572 * socket options (ipv6_sockglue.c)
573 */
574
575 extern int ipv6_setsockopt(struct sock *sk, int level,
576 int optname,
577 char __user *optval,
578 unsigned int optlen);
579 extern int ipv6_getsockopt(struct sock *sk, int level,
580 int optname,
581 char __user *optval,
582 int __user *optlen);
583 extern int compat_ipv6_setsockopt(struct sock *sk,
584 int level,
585 int optname,
586 char __user *optval,
587 unsigned int optlen);
588 extern int compat_ipv6_getsockopt(struct sock *sk,
589 int level,
590 int optname,
591 char __user *optval,
592 int __user *optlen);
593
594 extern int ip6_datagram_connect(struct sock *sk,
595 struct sockaddr *addr, int addr_len);
596
597 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
598 extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
599 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
600 u32 info, u8 *payload);
601 extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
602 extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
603
604 extern int inet6_release(struct socket *sock);
605 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
606 int addr_len);
607 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
608 int *uaddr_len, int peer);
609 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
610 unsigned long arg);
611
612 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
613 struct sock *sk);
614
615 /*
616 * reassembly.c
617 */
618 extern const struct proto_ops inet6_stream_ops;
619 extern const struct proto_ops inet6_dgram_ops;
620
621 struct group_source_req;
622 struct group_filter;
623
624 extern int ip6_mc_source(int add, int omode, struct sock *sk,
625 struct group_source_req *pgsr);
626 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
627 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
628 struct group_filter __user *optval,
629 int __user *optlen);
630 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
631 const struct in6_addr *daddr, u32 rnd);
632
633 #ifdef CONFIG_PROC_FS
634 extern int ac6_proc_init(struct net *net);
635 extern void ac6_proc_exit(struct net *net);
636 extern int raw6_proc_init(void);
637 extern void raw6_proc_exit(void);
638 extern int tcp6_proc_init(struct net *net);
639 extern void tcp6_proc_exit(struct net *net);
640 extern int udp6_proc_init(struct net *net);
641 extern void udp6_proc_exit(struct net *net);
642 extern int udplite6_proc_init(void);
643 extern void udplite6_proc_exit(void);
644 extern int ipv6_misc_proc_init(void);
645 extern void ipv6_misc_proc_exit(void);
646 extern int snmp6_register_dev(struct inet6_dev *idev);
647 extern int snmp6_unregister_dev(struct inet6_dev *idev);
648
649 #else
650 static inline int ac6_proc_init(struct net *net) { return 0; }
651 static inline void ac6_proc_exit(struct net *net) { }
652 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
653 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
654 #endif
655
656 #ifdef CONFIG_SYSCTL
657 extern ctl_table ipv6_route_table_template[];
658 extern ctl_table ipv6_icmp_table_template[];
659
660 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
661 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
662 extern int ipv6_sysctl_register(void);
663 extern void ipv6_sysctl_unregister(void);
664 extern int ipv6_static_sysctl_register(void);
665 extern void ipv6_static_sysctl_unregister(void);
666 #endif
667
668 #endif /* _NET_IPV6_H */