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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
103struct 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 */
115extern int sysctl_mld_max_msf;
116
117#define _DEVINC(net, statname, modifier, idev, field) \
118({ \
119 struct inet6_dev *_idev = (idev); \
120 if (likely(_idev != NULL)) \
121 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
122 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
123})
124
125/* per device counters are atomic_long_t */
126#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
127({ \
128 struct inet6_dev *_idev = (idev); \
129 if (likely(_idev != NULL)) \
130 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
131 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
132})
133
134/* per device and per net counters are atomic_long_t */
135#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
136({ \
137 struct inet6_dev *_idev = (idev); \
138 if (likely(_idev != NULL)) \
139 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
140 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
141})
142
143#define _DEVADD(net, statname, modifier, idev, field, val) \
144({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
148 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
149})
150
151#define _DEVUPD(net, statname, modifier, idev, field, val) \
152({ \
153 struct inet6_dev *_idev = (idev); \
154 if (likely(_idev != NULL)) \
155 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
156 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
157})
158
159/* MIBs */
160
161#define IP6_INC_STATS(net, idev,field) \
162 _DEVINC(net, ipv6, 64, idev, field)
163#define IP6_INC_STATS_BH(net, idev,field) \
164 _DEVINC(net, ipv6, 64_BH, idev, field)
165#define IP6_ADD_STATS(net, idev,field,val) \
166 _DEVADD(net, ipv6, 64, idev, field, val)
167#define IP6_ADD_STATS_BH(net, idev,field,val) \
168 _DEVADD(net, ipv6, 64_BH, idev, field, val)
169#define IP6_UPD_PO_STATS(net, idev,field,val) \
170 _DEVUPD(net, ipv6, 64, idev, field, val)
171#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
172 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
173#define ICMP6_INC_STATS(net, idev, field) \
174 _DEVINCATOMIC(net, icmpv6, , idev, field)
175#define ICMP6_INC_STATS_BH(net, idev, field) \
176 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
177
178#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
179 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
180#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
181 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
182#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
183 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
184
185struct ip6_ra_chain {
186 struct ip6_ra_chain *next;
187 struct sock *sk;
188 int sel;
189 void (*destructor)(struct sock *);
190};
191
192extern struct ip6_ra_chain *ip6_ra_chain;
193extern rwlock_t ip6_ra_lock;
194
195/*
196 This structure is prepared by protocol, when parsing
197 ancillary data and passed to IPv6.
198 */
199
200struct ipv6_txoptions {
201 /* Length of this structure */
202 int tot_len;
203
204 /* length of extension headers */
205
206 __u16 opt_flen; /* after fragment hdr */
207 __u16 opt_nflen; /* before fragment hdr */
208
209 struct ipv6_opt_hdr *hopopt;
210 struct ipv6_opt_hdr *dst0opt;
211 struct ipv6_rt_hdr *srcrt; /* Routing Header */
212 struct ipv6_opt_hdr *dst1opt;
213
214 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
215};
216
217struct ip6_flowlabel {
218 struct ip6_flowlabel *next;
219 __be32 label;
220 atomic_t users;
221 struct in6_addr dst;
222 struct ipv6_txoptions *opt;
223 unsigned long linger;
224 u8 share;
225 u32 owner;
226 unsigned long lastuse;
227 unsigned long expires;
228 struct net *fl_net;
229};
230
231#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
232#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
233
234struct ipv6_fl_socklist {
235 struct ipv6_fl_socklist *next;
236 struct ip6_flowlabel *fl;
237};
238
239extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
240extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
241 struct ip6_flowlabel * fl,
242 struct ipv6_txoptions * fopt);
243extern void fl6_free_socklist(struct sock *sk);
244extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
245extern int ip6_flowlabel_init(void);
246extern void ip6_flowlabel_cleanup(void);
247
248static inline void fl6_sock_release(struct ip6_flowlabel *fl)
249{
250 if (fl)
251 atomic_dec(&fl->users);
252}
253
254extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
255
256extern int ip6_ra_control(struct sock *sk, int sel);
257
258extern int ipv6_parse_hopopts(struct sk_buff *skb);
259
260extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
261extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
262 int newtype,
263 struct ipv6_opt_hdr __user *newopt,
264 int newoptlen);
265struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
266 struct ipv6_txoptions *opt);
267
268extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
269
270int ip6_frag_nqueues(struct net *net);
271int ip6_frag_mem(struct net *net);
272
273#define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
274#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
275#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
276
277extern int __ipv6_addr_type(const struct in6_addr *addr);
278static inline int ipv6_addr_type(const struct in6_addr *addr)
279{
280 return __ipv6_addr_type(addr) & 0xffff;
281}
282
283static inline int ipv6_addr_scope(const struct in6_addr *addr)
284{
285 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
286}
287
288static inline int __ipv6_addr_src_scope(int type)
289{
290 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
291}
292
293static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
294{
295 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
296}
297
298static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
299{
300 return memcmp(a1, a2, sizeof(struct in6_addr));
301}
302
303static inline bool
304ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
305 const struct in6_addr *a2)
306{
307#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
308 const unsigned long *ul1 = (const unsigned long *)a1;
309 const unsigned long *ulm = (const unsigned long *)m;
310 const unsigned long *ul2 = (const unsigned long *)a2;
311
312 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
313 ((ul1[1] ^ ul2[1]) & ulm[1]));
314#else
315 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
316 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
317 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
318 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
319#endif
320}
321
322static inline void ipv6_addr_prefix(struct in6_addr *pfx,
323 const struct in6_addr *addr,
324 int plen)
325{
326 /* caller must guarantee 0 <= plen <= 128 */
327 int o = plen >> 3,
328 b = plen & 0x7;
329
330 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
331 memcpy(pfx->s6_addr, addr, o);
332 if (b != 0)
333 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
334}
335
336static inline void ipv6_addr_set(struct in6_addr *addr,
337 __be32 w1, __be32 w2,
338 __be32 w3, __be32 w4)
339{
340 addr->s6_addr32[0] = w1;
341 addr->s6_addr32[1] = w2;
342 addr->s6_addr32[2] = w3;
343 addr->s6_addr32[3] = w4;
344}
345
346static inline bool ipv6_addr_equal(const struct in6_addr *a1,
347 const struct in6_addr *a2)
348{
349#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
350 const unsigned long *ul1 = (const unsigned long *)a1;
351 const unsigned long *ul2 = (const unsigned long *)a2;
352
353 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
354#else
355 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
356 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
357 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
358 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
359#endif
360}
361
362static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
363 unsigned int prefixlen)
364{
365 unsigned int pdw, pbi;
366
367 /* check complete u32 in prefix */
368 pdw = prefixlen >> 5;
369 if (pdw && memcmp(a1, a2, pdw << 2))
370 return false;
371
372 /* check incomplete u32 in prefix */
373 pbi = prefixlen & 0x1f;
374 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
375 return false;
376
377 return true;
378}
379
380static inline bool ipv6_prefix_equal(const struct in6_addr *a1,
381 const struct in6_addr *a2,
382 unsigned int prefixlen)
383{
384 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
385 prefixlen);
386}
387
388struct inet_frag_queue;
389
390enum ip6_defrag_users {
391 IP6_DEFRAG_LOCAL_DELIVER,
392 IP6_DEFRAG_CONNTRACK_IN,
393 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
394 IP6_DEFRAG_CONNTRACK_OUT,
395 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
396 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
397 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
398};
399
400struct ip6_create_arg {
401 __be32 id;
402 u32 user;
403 const struct in6_addr *src;
404 const struct in6_addr *dst;
405};
406
407void ip6_frag_init(struct inet_frag_queue *q, void *a);
408bool ip6_frag_match(struct inet_frag_queue *q, void *a);
409
410static inline bool ipv6_addr_any(const struct in6_addr *a)
411{
412#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
413 const unsigned long *ul = (const unsigned long *)a;
414
415 return (ul[0] | ul[1]) == 0UL;
416#else
417 return (a->s6_addr32[0] | a->s6_addr32[1] |
418 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
419#endif
420}
421
422static inline u32 ipv6_addr_hash(const struct in6_addr *a)
423{
424#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
425 const unsigned long *ul = (const unsigned long *)a;
426 unsigned long x = ul[0] ^ ul[1];
427
428 return (u32)(x ^ (x >> 32));
429#else
430 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
431 a->s6_addr32[2] ^ a->s6_addr32[3]);
432#endif
433}
434
435static inline bool ipv6_addr_loopback(const struct in6_addr *a)
436{
437 return (a->s6_addr32[0] | a->s6_addr32[1] |
438 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
439}
440
441static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
442{
443 return (a->s6_addr32[0] | a->s6_addr32[1] |
444 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
445}
446
447/*
448 * Check for a RFC 4843 ORCHID address
449 * (Overlay Routable Cryptographic Hash Identifiers)
450 */
451static inline bool ipv6_addr_orchid(const struct in6_addr *a)
452{
453 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
454}
455
456static inline void ipv6_addr_set_v4mapped(const __be32 addr,
457 struct in6_addr *v4mapped)
458{
459 ipv6_addr_set(v4mapped,
460 0, 0,
461 htonl(0x0000FFFF),
462 addr);
463}
464
465/*
466 * find the first different bit between two addresses
467 * length of address must be a multiple of 32bits
468 */
469static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
470{
471 const __be32 *a1 = token1, *a2 = token2;
472 int i;
473
474 addrlen >>= 2;
475
476 for (i = 0; i < addrlen; i++) {
477 __be32 xb = a1[i] ^ a2[i];
478 if (xb)
479 return i * 32 + 31 - __fls(ntohl(xb));
480 }
481
482 /*
483 * we should *never* get to this point since that
484 * would mean the addrs are equal
485 *
486 * However, we do get to it 8) And exacly, when
487 * addresses are equal 8)
488 *
489 * ip route add 1111::/128 via ...
490 * ip route add 1111::/64 via ...
491 * and we are here.
492 *
493 * Ideally, this function should stop comparison
494 * at prefix length. It does not, but it is still OK,
495 * if returned value is greater than prefix length.
496 * --ANK (980803)
497 */
498 return addrlen << 5;
499}
500
501static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
502{
503 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
504}
505
506extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
507
508/*
509 * Prototypes exported by ipv6
510 */
511
512/*
513 * rcv function (called from netdevice level)
514 */
515
516extern int ipv6_rcv(struct sk_buff *skb,
517 struct net_device *dev,
518 struct packet_type *pt,
519 struct net_device *orig_dev);
520
521extern int ip6_rcv_finish(struct sk_buff *skb);
522
523/*
524 * upper-layer output functions
525 */
526extern int ip6_xmit(struct sock *sk,
527 struct sk_buff *skb,
528 struct flowi6 *fl6,
529 struct ipv6_txoptions *opt,
530 int tclass);
531
532extern int ip6_nd_hdr(struct sock *sk,
533 struct sk_buff *skb,
534 struct net_device *dev,
535 const struct in6_addr *saddr,
536 const struct in6_addr *daddr,
537 int proto, int len);
538
539extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
540
541extern int ip6_append_data(struct sock *sk,
542 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
543 void *from,
544 int length,
545 int transhdrlen,
546 int hlimit,
547 int tclass,
548 struct ipv6_txoptions *opt,
549 struct flowi6 *fl6,
550 struct rt6_info *rt,
551 unsigned int flags,
552 int dontfrag);
553
554extern int ip6_push_pending_frames(struct sock *sk);
555
556extern void ip6_flush_pending_frames(struct sock *sk);
557
558extern int ip6_dst_lookup(struct sock *sk,
559 struct dst_entry **dst,
560 struct flowi6 *fl6);
561extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
562 struct flowi6 *fl6,
563 const struct in6_addr *final_dst,
564 bool can_sleep);
565extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
566 struct flowi6 *fl6,
567 const struct in6_addr *final_dst,
568 bool can_sleep);
569extern struct dst_entry * ip6_blackhole_route(struct net *net,
570 struct dst_entry *orig_dst);
571
572/*
573 * skb processing functions
574 */
575
576extern int ip6_output(struct sk_buff *skb);
577extern int ip6_forward(struct sk_buff *skb);
578extern int ip6_input(struct sk_buff *skb);
579extern int ip6_mc_input(struct sk_buff *skb);
580
581extern int __ip6_local_out(struct sk_buff *skb);
582extern int ip6_local_out(struct sk_buff *skb);
583
584/*
585 * Extension header (options) processing
586 */
587
588extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
589 struct ipv6_txoptions *opt,
590 u8 *proto,
591 struct in6_addr **daddr_p);
592extern void ipv6_push_frag_opts(struct sk_buff *skb,
593 struct ipv6_txoptions *opt,
594 u8 *proto);
595
596extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
597 u8 *nexthdrp, __be16 *frag_offp);
598
599extern bool ipv6_ext_hdr(u8 nexthdr);
600
601extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
602
603extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
604 const struct ipv6_txoptions *opt,
605 struct in6_addr *orig);
606
607/*
608 * socket options (ipv6_sockglue.c)
609 */
610
611extern int ipv6_setsockopt(struct sock *sk, int level,
612 int optname,
613 char __user *optval,
614 unsigned int optlen);
615extern int ipv6_getsockopt(struct sock *sk, int level,
616 int optname,
617 char __user *optval,
618 int __user *optlen);
619extern int compat_ipv6_setsockopt(struct sock *sk,
620 int level,
621 int optname,
622 char __user *optval,
623 unsigned int optlen);
624extern int compat_ipv6_getsockopt(struct sock *sk,
625 int level,
626 int optname,
627 char __user *optval,
628 int __user *optlen);
629
630extern int ip6_datagram_connect(struct sock *sk,
631 struct sockaddr *addr, int addr_len);
632
633extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
634extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
635extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
636 u32 info, u8 *payload);
637extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
638extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
639
640extern int inet6_release(struct socket *sock);
641extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
642 int addr_len);
643extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
644 int *uaddr_len, int peer);
645extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
646 unsigned long arg);
647
648extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
649 struct sock *sk);
650
651/*
652 * reassembly.c
653 */
654extern const struct proto_ops inet6_stream_ops;
655extern const struct proto_ops inet6_dgram_ops;
656
657struct group_source_req;
658struct group_filter;
659
660extern int ip6_mc_source(int add, int omode, struct sock *sk,
661 struct group_source_req *pgsr);
662extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
663extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
664 struct group_filter __user *optval,
665 int __user *optlen);
666extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
667 const struct in6_addr *daddr, u32 rnd);
668
669#ifdef CONFIG_PROC_FS
670extern int ac6_proc_init(struct net *net);
671extern void ac6_proc_exit(struct net *net);
672extern int raw6_proc_init(void);
673extern void raw6_proc_exit(void);
674extern int tcp6_proc_init(struct net *net);
675extern void tcp6_proc_exit(struct net *net);
676extern int udp6_proc_init(struct net *net);
677extern void udp6_proc_exit(struct net *net);
678extern int udplite6_proc_init(void);
679extern void udplite6_proc_exit(void);
680extern int ipv6_misc_proc_init(void);
681extern void ipv6_misc_proc_exit(void);
682extern int snmp6_register_dev(struct inet6_dev *idev);
683extern int snmp6_unregister_dev(struct inet6_dev *idev);
684
685#else
686static inline int ac6_proc_init(struct net *net) { return 0; }
687static inline void ac6_proc_exit(struct net *net) { }
688static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
689static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
690#endif
691
692#ifdef CONFIG_SYSCTL
693extern ctl_table ipv6_route_table_template[];
694extern ctl_table ipv6_icmp_table_template[];
695
696extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
697extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
698extern int ipv6_sysctl_register(void);
699extern void ipv6_sysctl_unregister(void);
700#endif
701
702#endif /* _NET_IPV6_H */