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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;
116extern 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
177struct ip6_ra_chain {
178 struct ip6_ra_chain *next;
179 struct sock *sk;
180 int sel;
181 void (*destructor)(struct sock *);
182};
183
184extern struct ip6_ra_chain *ip6_ra_chain;
185extern 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
192struct 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
209struct 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
226struct ipv6_fl_socklist {
227 struct ipv6_fl_socklist *next;
228 struct ip6_flowlabel *fl;
229};
230
231extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
232extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
233 struct ip6_flowlabel * fl,
234 struct ipv6_txoptions * fopt);
235extern void fl6_free_socklist(struct sock *sk);
236extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
237extern int ip6_flowlabel_init(void);
238extern void ip6_flowlabel_cleanup(void);
239
240static inline void fl6_sock_release(struct ip6_flowlabel *fl)
241{
242 if (fl)
243 atomic_dec(&fl->users);
244}
245
246extern int ip6_ra_control(struct sock *sk, int sel);
247
248extern int ipv6_parse_hopopts(struct sk_buff *skb);
249
250extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
251extern 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);
255struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
256 struct ipv6_txoptions *opt);
257
258extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
259
260int ip6_frag_nqueues(struct net *net);
261int 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
267extern int __ipv6_addr_type(const struct in6_addr *addr);
268static inline int ipv6_addr_type(const struct in6_addr *addr)
269{
270 return __ipv6_addr_type(addr) & 0xffff;
271}
272
273static inline int ipv6_addr_scope(const struct in6_addr *addr)
274{
275 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
276}
277
278static inline int __ipv6_addr_src_scope(int type)
279{
280 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
281}
282
283static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
284{
285 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
286}
287
288static 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
293static inline int
294ipv6_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
303static 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
308static 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
322static 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
332static 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
341static 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
359static 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
367struct inet_frag_queue;
368
369enum 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
379struct ip6_create_arg {
380 __be32 id;
381 u32 user;
382 const struct in6_addr *src;
383 const struct in6_addr *dst;
384};
385
386void ip6_frag_init(struct inet_frag_queue *q, void *a);
387int ip6_frag_match(struct inet_frag_queue *q, void *a);
388
389static 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
395static 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
401static 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 */
411static inline int ipv6_addr_orchid(const struct in6_addr *a)
412{
413 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
414}
415
416static 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 */
429static 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
461static 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
466extern 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
476extern int ipv6_rcv(struct sk_buff *skb,
477 struct net_device *dev,
478 struct packet_type *pt,
479 struct net_device *orig_dev);
480
481extern int ip6_rcv_finish(struct sk_buff *skb);
482
483/*
484 * upper-layer output functions
485 */
486extern int ip6_xmit(struct sock *sk,
487 struct sk_buff *skb,
488 struct flowi6 *fl6,
489 struct ipv6_txoptions *opt);
490
491extern int ip6_nd_hdr(struct sock *sk,
492 struct sk_buff *skb,
493 struct net_device *dev,
494 const struct in6_addr *saddr,
495 const struct in6_addr *daddr,
496 int proto, int len);
497
498extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
499
500extern int ip6_append_data(struct sock *sk,
501 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
502 void *from,
503 int length,
504 int transhdrlen,
505 int hlimit,
506 int tclass,
507 struct ipv6_txoptions *opt,
508 struct flowi6 *fl6,
509 struct rt6_info *rt,
510 unsigned int flags,
511 int dontfrag);
512
513extern int ip6_push_pending_frames(struct sock *sk);
514
515extern void ip6_flush_pending_frames(struct sock *sk);
516
517extern int ip6_dst_lookup(struct sock *sk,
518 struct dst_entry **dst,
519 struct flowi6 *fl6);
520extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
521 struct flowi6 *fl6,
522 const struct in6_addr *final_dst,
523 bool can_sleep);
524extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
525 struct flowi6 *fl6,
526 const struct in6_addr *final_dst,
527 bool can_sleep);
528extern struct dst_entry * ip6_blackhole_route(struct net *net,
529 struct dst_entry *orig_dst);
530
531/*
532 * skb processing functions
533 */
534
535extern int ip6_output(struct sk_buff *skb);
536extern int ip6_forward(struct sk_buff *skb);
537extern int ip6_input(struct sk_buff *skb);
538extern int ip6_mc_input(struct sk_buff *skb);
539
540extern int __ip6_local_out(struct sk_buff *skb);
541extern int ip6_local_out(struct sk_buff *skb);
542
543/*
544 * Extension header (options) processing
545 */
546
547extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
548 struct ipv6_txoptions *opt,
549 u8 *proto,
550 struct in6_addr **daddr_p);
551extern void ipv6_push_frag_opts(struct sk_buff *skb,
552 struct ipv6_txoptions *opt,
553 u8 *proto);
554
555extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
556 u8 *nexthdrp);
557
558extern int ipv6_ext_hdr(u8 nexthdr);
559
560extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
561
562extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
563 const struct ipv6_txoptions *opt,
564 struct in6_addr *orig);
565
566/*
567 * socket options (ipv6_sockglue.c)
568 */
569
570extern int ipv6_setsockopt(struct sock *sk, int level,
571 int optname,
572 char __user *optval,
573 unsigned int optlen);
574extern int ipv6_getsockopt(struct sock *sk, int level,
575 int optname,
576 char __user *optval,
577 int __user *optlen);
578extern int compat_ipv6_setsockopt(struct sock *sk,
579 int level,
580 int optname,
581 char __user *optval,
582 unsigned int optlen);
583extern int compat_ipv6_getsockopt(struct sock *sk,
584 int level,
585 int optname,
586 char __user *optval,
587 int __user *optlen);
588
589extern int ip6_datagram_connect(struct sock *sk,
590 struct sockaddr *addr, int addr_len);
591
592extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
593extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
594extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
595 u32 info, u8 *payload);
596extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
597extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
598
599extern int inet6_release(struct socket *sock);
600extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
601 int addr_len);
602extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
603 int *uaddr_len, int peer);
604extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
605 unsigned long arg);
606
607extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
608 struct sock *sk);
609
610/*
611 * reassembly.c
612 */
613extern const struct proto_ops inet6_stream_ops;
614extern const struct proto_ops inet6_dgram_ops;
615
616struct group_source_req;
617struct group_filter;
618
619extern int ip6_mc_source(int add, int omode, struct sock *sk,
620 struct group_source_req *pgsr);
621extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
622extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
623 struct group_filter __user *optval,
624 int __user *optlen);
625extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
626 const struct in6_addr *daddr, u32 rnd);
627
628#ifdef CONFIG_PROC_FS
629extern int ac6_proc_init(struct net *net);
630extern void ac6_proc_exit(struct net *net);
631extern int raw6_proc_init(void);
632extern void raw6_proc_exit(void);
633extern int tcp6_proc_init(struct net *net);
634extern void tcp6_proc_exit(struct net *net);
635extern int udp6_proc_init(struct net *net);
636extern void udp6_proc_exit(struct net *net);
637extern int udplite6_proc_init(void);
638extern void udplite6_proc_exit(void);
639extern int ipv6_misc_proc_init(void);
640extern void ipv6_misc_proc_exit(void);
641extern int snmp6_register_dev(struct inet6_dev *idev);
642extern int snmp6_unregister_dev(struct inet6_dev *idev);
643
644#else
645static inline int ac6_proc_init(struct net *net) { return 0; }
646static inline void ac6_proc_exit(struct net *net) { }
647static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
648static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
649#endif
650
651#ifdef CONFIG_SYSCTL
652extern ctl_table ipv6_route_table_template[];
653extern ctl_table ipv6_icmp_table_template[];
654
655extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
656extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
657extern int ipv6_sysctl_register(void);
658extern void ipv6_sysctl_unregister(void);
659extern int ipv6_static_sysctl_register(void);
660extern void ipv6_static_sysctl_unregister(void);
661#endif
662
663#endif /* _NET_IPV6_H */
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 int ip6_ra_control(struct sock *sk, int sel);
255
256extern int ipv6_parse_hopopts(struct sk_buff *skb);
257
258extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
259extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
260 int newtype,
261 struct ipv6_opt_hdr __user *newopt,
262 int newoptlen);
263struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
264 struct ipv6_txoptions *opt);
265
266extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
267
268int ip6_frag_nqueues(struct net *net);
269int ip6_frag_mem(struct net *net);
270
271#define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
272#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
273#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
274
275extern int __ipv6_addr_type(const struct in6_addr *addr);
276static inline int ipv6_addr_type(const struct in6_addr *addr)
277{
278 return __ipv6_addr_type(addr) & 0xffff;
279}
280
281static inline int ipv6_addr_scope(const struct in6_addr *addr)
282{
283 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
284}
285
286static inline int __ipv6_addr_src_scope(int type)
287{
288 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
289}
290
291static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
292{
293 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
294}
295
296static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
297{
298 return memcmp(a1, a2, sizeof(struct in6_addr));
299}
300
301static inline int
302ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
303 const struct in6_addr *a2)
304{
305 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
306 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
307 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
308 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
309}
310
311static inline void ipv6_addr_prefix(struct in6_addr *pfx,
312 const struct in6_addr *addr,
313 int plen)
314{
315 /* caller must guarantee 0 <= plen <= 128 */
316 int o = plen >> 3,
317 b = plen & 0x7;
318
319 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
320 memcpy(pfx->s6_addr, addr, o);
321 if (b != 0)
322 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
323}
324
325static inline void ipv6_addr_set(struct in6_addr *addr,
326 __be32 w1, __be32 w2,
327 __be32 w3, __be32 w4)
328{
329 addr->s6_addr32[0] = w1;
330 addr->s6_addr32[1] = w2;
331 addr->s6_addr32[2] = w3;
332 addr->s6_addr32[3] = w4;
333}
334
335static inline bool ipv6_addr_equal(const struct in6_addr *a1,
336 const struct in6_addr *a2)
337{
338 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
339 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
340 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
341 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
342}
343
344static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
345 unsigned int prefixlen)
346{
347 unsigned int pdw, pbi;
348
349 /* check complete u32 in prefix */
350 pdw = prefixlen >> 5;
351 if (pdw && memcmp(a1, a2, pdw << 2))
352 return false;
353
354 /* check incomplete u32 in prefix */
355 pbi = prefixlen & 0x1f;
356 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
357 return false;
358
359 return true;
360}
361
362static inline bool ipv6_prefix_equal(const struct in6_addr *a1,
363 const struct in6_addr *a2,
364 unsigned int prefixlen)
365{
366 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
367 prefixlen);
368}
369
370struct inet_frag_queue;
371
372enum ip6_defrag_users {
373 IP6_DEFRAG_LOCAL_DELIVER,
374 IP6_DEFRAG_CONNTRACK_IN,
375 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
376 IP6_DEFRAG_CONNTRACK_OUT,
377 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
378 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
379 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
380};
381
382struct ip6_create_arg {
383 __be32 id;
384 u32 user;
385 const struct in6_addr *src;
386 const struct in6_addr *dst;
387};
388
389void ip6_frag_init(struct inet_frag_queue *q, void *a);
390bool ip6_frag_match(struct inet_frag_queue *q, void *a);
391
392static inline bool ipv6_addr_any(const struct in6_addr *a)
393{
394 return (a->s6_addr32[0] | a->s6_addr32[1] |
395 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
396}
397
398static inline bool ipv6_addr_loopback(const struct in6_addr *a)
399{
400 return (a->s6_addr32[0] | a->s6_addr32[1] |
401 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
402}
403
404static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
405{
406 return (a->s6_addr32[0] | a->s6_addr32[1] |
407 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
408}
409
410/*
411 * Check for a RFC 4843 ORCHID address
412 * (Overlay Routable Cryptographic Hash Identifiers)
413 */
414static inline bool ipv6_addr_orchid(const struct in6_addr *a)
415{
416 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
417}
418
419static inline void ipv6_addr_set_v4mapped(const __be32 addr,
420 struct in6_addr *v4mapped)
421{
422 ipv6_addr_set(v4mapped,
423 0, 0,
424 htonl(0x0000FFFF),
425 addr);
426}
427
428/*
429 * find the first different bit between two addresses
430 * length of address must be a multiple of 32bits
431 */
432static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
433{
434 const __be32 *a1 = token1, *a2 = token2;
435 int i;
436
437 addrlen >>= 2;
438
439 for (i = 0; i < addrlen; i++) {
440 __be32 xb = a1[i] ^ a2[i];
441 if (xb)
442 return i * 32 + 31 - __fls(ntohl(xb));
443 }
444
445 /*
446 * we should *never* get to this point since that
447 * would mean the addrs are equal
448 *
449 * However, we do get to it 8) And exacly, when
450 * addresses are equal 8)
451 *
452 * ip route add 1111::/128 via ...
453 * ip route add 1111::/64 via ...
454 * and we are here.
455 *
456 * Ideally, this function should stop comparison
457 * at prefix length. It does not, but it is still OK,
458 * if returned value is greater than prefix length.
459 * --ANK (980803)
460 */
461 return addrlen << 5;
462}
463
464static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
465{
466 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
467}
468
469extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
470
471/*
472 * Prototypes exported by ipv6
473 */
474
475/*
476 * rcv function (called from netdevice level)
477 */
478
479extern int ipv6_rcv(struct sk_buff *skb,
480 struct net_device *dev,
481 struct packet_type *pt,
482 struct net_device *orig_dev);
483
484extern int ip6_rcv_finish(struct sk_buff *skb);
485
486/*
487 * upper-layer output functions
488 */
489extern int ip6_xmit(struct sock *sk,
490 struct sk_buff *skb,
491 struct flowi6 *fl6,
492 struct ipv6_txoptions *opt,
493 int tclass);
494
495extern int ip6_nd_hdr(struct sock *sk,
496 struct sk_buff *skb,
497 struct net_device *dev,
498 const struct in6_addr *saddr,
499 const struct in6_addr *daddr,
500 int proto, int len);
501
502extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
503
504extern int ip6_append_data(struct sock *sk,
505 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
506 void *from,
507 int length,
508 int transhdrlen,
509 int hlimit,
510 int tclass,
511 struct ipv6_txoptions *opt,
512 struct flowi6 *fl6,
513 struct rt6_info *rt,
514 unsigned int flags,
515 int dontfrag);
516
517extern int ip6_push_pending_frames(struct sock *sk);
518
519extern void ip6_flush_pending_frames(struct sock *sk);
520
521extern int ip6_dst_lookup(struct sock *sk,
522 struct dst_entry **dst,
523 struct flowi6 *fl6);
524extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
525 struct flowi6 *fl6,
526 const struct in6_addr *final_dst,
527 bool can_sleep);
528extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
529 struct flowi6 *fl6,
530 const struct in6_addr *final_dst,
531 bool can_sleep);
532extern struct dst_entry * ip6_blackhole_route(struct net *net,
533 struct dst_entry *orig_dst);
534
535/*
536 * skb processing functions
537 */
538
539extern int ip6_output(struct sk_buff *skb);
540extern int ip6_forward(struct sk_buff *skb);
541extern int ip6_input(struct sk_buff *skb);
542extern int ip6_mc_input(struct sk_buff *skb);
543
544extern int __ip6_local_out(struct sk_buff *skb);
545extern int ip6_local_out(struct sk_buff *skb);
546
547/*
548 * Extension header (options) processing
549 */
550
551extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
552 struct ipv6_txoptions *opt,
553 u8 *proto,
554 struct in6_addr **daddr_p);
555extern void ipv6_push_frag_opts(struct sk_buff *skb,
556 struct ipv6_txoptions *opt,
557 u8 *proto);
558
559extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
560 u8 *nexthdrp, __be16 *frag_offp);
561
562extern bool ipv6_ext_hdr(u8 nexthdr);
563
564extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
565
566extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
567 const struct ipv6_txoptions *opt,
568 struct in6_addr *orig);
569
570/*
571 * socket options (ipv6_sockglue.c)
572 */
573
574extern int ipv6_setsockopt(struct sock *sk, int level,
575 int optname,
576 char __user *optval,
577 unsigned int optlen);
578extern int ipv6_getsockopt(struct sock *sk, int level,
579 int optname,
580 char __user *optval,
581 int __user *optlen);
582extern int compat_ipv6_setsockopt(struct sock *sk,
583 int level,
584 int optname,
585 char __user *optval,
586 unsigned int optlen);
587extern int compat_ipv6_getsockopt(struct sock *sk,
588 int level,
589 int optname,
590 char __user *optval,
591 int __user *optlen);
592
593extern int ip6_datagram_connect(struct sock *sk,
594 struct sockaddr *addr, int addr_len);
595
596extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
597extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
598extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
599 u32 info, u8 *payload);
600extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
601extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
602
603extern int inet6_release(struct socket *sock);
604extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
605 int addr_len);
606extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
607 int *uaddr_len, int peer);
608extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
609 unsigned long arg);
610
611extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
612 struct sock *sk);
613
614/*
615 * reassembly.c
616 */
617extern const struct proto_ops inet6_stream_ops;
618extern const struct proto_ops inet6_dgram_ops;
619
620struct group_source_req;
621struct group_filter;
622
623extern int ip6_mc_source(int add, int omode, struct sock *sk,
624 struct group_source_req *pgsr);
625extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
626extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
627 struct group_filter __user *optval,
628 int __user *optlen);
629extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
630 const struct in6_addr *daddr, u32 rnd);
631
632#ifdef CONFIG_PROC_FS
633extern int ac6_proc_init(struct net *net);
634extern void ac6_proc_exit(struct net *net);
635extern int raw6_proc_init(void);
636extern void raw6_proc_exit(void);
637extern int tcp6_proc_init(struct net *net);
638extern void tcp6_proc_exit(struct net *net);
639extern int udp6_proc_init(struct net *net);
640extern void udp6_proc_exit(struct net *net);
641extern int udplite6_proc_init(void);
642extern void udplite6_proc_exit(void);
643extern int ipv6_misc_proc_init(void);
644extern void ipv6_misc_proc_exit(void);
645extern int snmp6_register_dev(struct inet6_dev *idev);
646extern int snmp6_unregister_dev(struct inet6_dev *idev);
647
648#else
649static inline int ac6_proc_init(struct net *net) { return 0; }
650static inline void ac6_proc_exit(struct net *net) { }
651static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
652static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
653#endif
654
655#ifdef CONFIG_SYSCTL
656extern ctl_table ipv6_route_table_template[];
657extern ctl_table ipv6_icmp_table_template[];
658
659extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
660extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
661extern int ipv6_sysctl_register(void);
662extern void ipv6_sysctl_unregister(void);
663#endif
664
665#endif /* _NET_IPV6_H */