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TOMOYO Linux Cross Reference
Linux/include/net/ipv6.h

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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 #define IPV6_ADDR_RESERVED      0x2000U /* reserved address space */
 77 
 78 /*
 79  *      Addr scopes
 80  */
 81 #ifdef __KERNEL__
 82 #define IPV6_ADDR_MC_SCOPE(a)   \
 83         ((a)->s6_addr[1] & 0x0f)        /* nonstandard */
 84 #define __IPV6_ADDR_SCOPE_INVALID       -1
 85 #endif
 86 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 87 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 88 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 89 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08
 90 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 91 
 92 /*
 93  *      fragmentation header
 94  */
 95 
 96 struct frag_hdr {
 97         __u8    nexthdr;
 98         __u8    reserved;
 99         __be16  frag_off;
100         __be32  identification;
101 };
102 
103 #define IP6_MF  0x0001
104 
105 #ifdef __KERNEL__
106 
107 #include <net/sock.h>
108 
109 /* sysctls */
110 extern int sysctl_mld_max_msf;
111 extern struct ctl_path net_ipv6_ctl_path[];
112 
113 #define _DEVINC(net, statname, modifier, idev, field)                   \
114 ({                                                                      \
115         struct inet6_dev *_idev = (idev);                               \
116         if (likely(_idev != NULL))                                      \
117                 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
118         SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
119 })
120 
121 #define _DEVADD(net, statname, modifier, idev, field, val)              \
122 ({                                                                      \
123         struct inet6_dev *_idev = (idev);                               \
124         if (likely(_idev != NULL))                                      \
125                 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
126         SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
127 })
128 
129 #define _DEVUPD(net, statname, modifier, idev, field, val)              \
130 ({                                                                      \
131         struct inet6_dev *_idev = (idev);                               \
132         if (likely(_idev != NULL))                                      \
133                 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
134         SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
135 })
136 
137 /* MIBs */
138 
139 #define IP6_INC_STATS(net, idev,field)          \
140                 _DEVINC(net, ipv6, , idev, field)
141 #define IP6_INC_STATS_BH(net, idev,field)       \
142                 _DEVINC(net, ipv6, _BH, idev, field)
143 #define IP6_ADD_STATS(net, idev,field,val)      \
144                 _DEVADD(net, ipv6, , idev, field, val)
145 #define IP6_ADD_STATS_BH(net, idev,field,val)   \
146                 _DEVADD(net, ipv6, _BH, idev, field, val)
147 #define IP6_UPD_PO_STATS(net, idev,field,val)   \
148                 _DEVUPD(net, ipv6, , idev, field, val)
149 #define IP6_UPD_PO_STATS_BH(net, idev,field,val)   \
150                 _DEVUPD(net, ipv6, _BH, idev, field, val)
151 #define ICMP6_INC_STATS(net, idev, field)       \
152                 _DEVINC(net, icmpv6, , idev, field)
153 #define ICMP6_INC_STATS_BH(net, idev, field)    \
154                 _DEVINC(net, icmpv6, _BH, idev, field)
155 
156 #define ICMP6MSGOUT_INC_STATS(net, idev, field)         \
157         _DEVINC(net, icmpv6msg, , idev, field +256)
158 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field)      \
159         _DEVINC(net, icmpv6msg, _BH, idev, field +256)
160 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field)       \
161         _DEVINC(net, icmpv6msg, _BH, idev, field)
162 
163 struct ip6_ra_chain
164 {
165         struct ip6_ra_chain     *next;
166         struct sock             *sk;
167         int                     sel;
168         void                    (*destructor)(struct sock *);
169 };
170 
171 extern struct ip6_ra_chain      *ip6_ra_chain;
172 extern rwlock_t ip6_ra_lock;
173 
174 /*
175    This structure is prepared by protocol, when parsing
176    ancillary data and passed to IPv6.
177  */
178 
179 struct ipv6_txoptions
180 {
181         /* Length of this structure */
182         int                     tot_len;
183 
184         /* length of extension headers   */
185 
186         __u16                   opt_flen;       /* after fragment hdr */
187         __u16                   opt_nflen;      /* before fragment hdr */
188 
189         struct ipv6_opt_hdr     *hopopt;
190         struct ipv6_opt_hdr     *dst0opt;
191         struct ipv6_rt_hdr      *srcrt; /* Routing Header */
192         struct ipv6_opt_hdr     *dst1opt;
193 
194         /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
195 };
196 
197 struct ip6_flowlabel
198 {
199         struct ip6_flowlabel    *next;
200         __be32                  label;
201         atomic_t                users;
202         struct in6_addr         dst;
203         struct ipv6_txoptions   *opt;
204         unsigned long           linger;
205         u8                      share;
206         u32                     owner;
207         unsigned long           lastuse;
208         unsigned long           expires;
209         struct net              *fl_net;
210 };
211 
212 #define IPV6_FLOWINFO_MASK      cpu_to_be32(0x0FFFFFFF)
213 #define IPV6_FLOWLABEL_MASK     cpu_to_be32(0x000FFFFF)
214 
215 struct ipv6_fl_socklist
216 {
217         struct ipv6_fl_socklist *next;
218         struct ip6_flowlabel    *fl;
219 };
220 
221 extern struct ip6_flowlabel     *fl6_sock_lookup(struct sock *sk, __be32 label);
222 extern struct ipv6_txoptions    *fl6_merge_options(struct ipv6_txoptions * opt_space,
223                                                    struct ip6_flowlabel * fl,
224                                                    struct ipv6_txoptions * fopt);
225 extern void                     fl6_free_socklist(struct sock *sk);
226 extern int                      ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
227 extern int                      ip6_flowlabel_init(void);
228 extern void                     ip6_flowlabel_cleanup(void);
229 
230 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
231 {
232         if (fl)
233                 atomic_dec(&fl->users);
234 }
235 
236 extern int                      ip6_ra_control(struct sock *sk, int sel);
237 
238 extern int                      ipv6_parse_hopopts(struct sk_buff *skb);
239 
240 extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
241 extern struct ipv6_txoptions *  ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
242                                                    int newtype,
243                                                    struct ipv6_opt_hdr __user *newopt,
244                                                    int newoptlen);
245 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
246                                           struct ipv6_txoptions *opt);
247 
248 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
249 
250 int ip6_frag_nqueues(struct net *net);
251 int ip6_frag_mem(struct net *net);
252 
253 #define IPV6_FRAG_TIMEOUT       (60*HZ)         /* 60 seconds */
254 
255 extern int __ipv6_addr_type(const struct in6_addr *addr);
256 static inline int ipv6_addr_type(const struct in6_addr *addr)
257 {
258         return __ipv6_addr_type(addr) & 0xffff;
259 }
260 
261 static inline int ipv6_addr_scope(const struct in6_addr *addr)
262 {
263         return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
264 }
265 
266 static inline int __ipv6_addr_src_scope(int type)
267 {
268         return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
269 }
270 
271 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
272 {
273         return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
274 }
275 
276 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
277 {
278         return memcmp(a1, a2, sizeof(struct in6_addr));
279 }
280 
281 static inline int
282 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
283                      const struct in6_addr *a2)
284 {
285         return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
286                    ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
287                    ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
288                    ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
289 }
290 
291 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
292 {
293         memcpy(a1, a2, sizeof(struct in6_addr));
294 }
295 
296 static inline void ipv6_addr_prefix(struct in6_addr *pfx, 
297                                     const struct in6_addr *addr,
298                                     int plen)
299 {
300         /* caller must guarantee 0 <= plen <= 128 */
301         int o = plen >> 3,
302             b = plen & 0x7;
303 
304         memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
305         memcpy(pfx->s6_addr, addr, o);
306         if (b != 0)
307                 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
308 }
309 
310 static inline void ipv6_addr_set(struct in6_addr *addr, 
311                                      __be32 w1, __be32 w2,
312                                      __be32 w3, __be32 w4)
313 {
314         addr->s6_addr32[0] = w1;
315         addr->s6_addr32[1] = w2;
316         addr->s6_addr32[2] = w3;
317         addr->s6_addr32[3] = w4;
318 }
319 
320 static inline int ipv6_addr_equal(const struct in6_addr *a1,
321                                   const struct in6_addr *a2)
322 {
323         return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
324                  (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
325                  (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
326                  (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
327 }
328 
329 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
330                                       unsigned int prefixlen)
331 {
332         unsigned pdw, pbi;
333 
334         /* check complete u32 in prefix */
335         pdw = prefixlen >> 5;
336         if (pdw && memcmp(a1, a2, pdw << 2))
337                 return 0;
338 
339         /* check incomplete u32 in prefix */
340         pbi = prefixlen & 0x1f;
341         if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
342                 return 0;
343 
344         return 1;
345 }
346 
347 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
348                                     const struct in6_addr *a2,
349                                     unsigned int prefixlen)
350 {
351         return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
352                                    prefixlen);
353 }
354 
355 struct inet_frag_queue;
356 
357 enum ip6_defrag_users {
358         IP6_DEFRAG_LOCAL_DELIVER,
359         IP6_DEFRAG_CONNTRACK_IN,
360         IP6_DEFRAG_CONNTRACK_OUT,
361         IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
362 };
363 
364 struct ip6_create_arg {
365         __be32 id;
366         u32 user;
367         struct in6_addr *src;
368         struct in6_addr *dst;
369 };
370 
371 void ip6_frag_init(struct inet_frag_queue *q, void *a);
372 int ip6_frag_match(struct inet_frag_queue *q, void *a);
373 
374 static inline int ipv6_addr_any(const struct in6_addr *a)
375 {
376         return ((a->s6_addr32[0] | a->s6_addr32[1] | 
377                  a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 
378 }
379 
380 static inline int ipv6_addr_loopback(const struct in6_addr *a)
381 {
382         return ((a->s6_addr32[0] | a->s6_addr32[1] |
383                  a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
384 }
385 
386 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
387 {
388         return ((a->s6_addr32[0] | a->s6_addr32[1] |
389                  (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
390 }
391 
392 /*
393  * Check for a RFC 4843 ORCHID address
394  * (Overlay Routable Cryptographic Hash Identifiers)
395  */
396 static inline int ipv6_addr_orchid(const struct in6_addr *a)
397 {
398         return ((a->s6_addr32[0] & htonl(0xfffffff0))
399                 == htonl(0x20010010));
400 }
401 
402 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
403                                           struct in6_addr *v4mapped)
404 {
405         ipv6_addr_set(v4mapped,
406                         0, 0,
407                         htonl(0x0000FFFF),
408                         addr);
409 }
410 
411 /*
412  * find the first different bit between two addresses
413  * length of address must be a multiple of 32bits
414  */
415 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
416 {
417         const __be32 *a1 = token1, *a2 = token2;
418         int i;
419 
420         addrlen >>= 2;
421 
422         for (i = 0; i < addrlen; i++) {
423                 __be32 xb = a1[i] ^ a2[i];
424                 if (xb)
425                         return i * 32 + 32 - fls(ntohl(xb));
426         }
427 
428         /*
429          *      we should *never* get to this point since that 
430          *      would mean the addrs are equal
431          *
432          *      However, we do get to it 8) And exacly, when
433          *      addresses are equal 8)
434          *
435          *      ip route add 1111::/128 via ...
436          *      ip route add 1111::/64 via ...
437          *      and we are here.
438          *
439          *      Ideally, this function should stop comparison
440          *      at prefix length. It does not, but it is still OK,
441          *      if returned value is greater than prefix length.
442          *                                      --ANK (980803)
443          */
444         return (addrlen << 5);
445 }
446 
447 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
448 {
449         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
450 }
451 
452 extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
453 
454 /*
455  *      Prototypes exported by ipv6
456  */
457 
458 /*
459  *      rcv function (called from netdevice level)
460  */
461 
462 extern int                      ipv6_rcv(struct sk_buff *skb, 
463                                          struct net_device *dev, 
464                                          struct packet_type *pt,
465                                          struct net_device *orig_dev);
466 
467 extern int                      ip6_rcv_finish(struct sk_buff *skb);
468 
469 /*
470  *      upper-layer output functions
471  */
472 extern int                      ip6_xmit(struct sock *sk,
473                                          struct sk_buff *skb,
474                                          struct flowi *fl,
475                                          struct ipv6_txoptions *opt,
476                                          int ipfragok);
477 
478 extern int                      ip6_nd_hdr(struct sock *sk,
479                                            struct sk_buff *skb,
480                                            struct net_device *dev,
481                                            const struct in6_addr *saddr,
482                                            const struct in6_addr *daddr,
483                                            int proto, int len);
484 
485 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
486 
487 extern int                      ip6_append_data(struct sock *sk,
488                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
489                                                 void *from,
490                                                 int length,
491                                                 int transhdrlen,
492                                                 int hlimit,
493                                                 int tclass,
494                                                 struct ipv6_txoptions *opt,
495                                                 struct flowi *fl,
496                                                 struct rt6_info *rt,
497                                                 unsigned int flags);
498 
499 extern int                      ip6_push_pending_frames(struct sock *sk);
500 
501 extern void                     ip6_flush_pending_frames(struct sock *sk);
502 
503 extern int                      ip6_dst_lookup(struct sock *sk,
504                                                struct dst_entry **dst,
505                                                struct flowi *fl);
506 extern int                      ip6_dst_blackhole(struct sock *sk,
507                                                   struct dst_entry **dst,
508                                                   struct flowi *fl);
509 extern int                      ip6_sk_dst_lookup(struct sock *sk,
510                                                   struct dst_entry **dst,
511                                                   struct flowi *fl);
512 
513 /*
514  *      skb processing functions
515  */
516 
517 extern int                      ip6_output(struct sk_buff *skb);
518 extern int                      ip6_forward(struct sk_buff *skb);
519 extern int                      ip6_input(struct sk_buff *skb);
520 extern int                      ip6_mc_input(struct sk_buff *skb);
521 
522 extern int                      __ip6_local_out(struct sk_buff *skb);
523 extern int                      ip6_local_out(struct sk_buff *skb);
524 
525 /*
526  *      Extension header (options) processing
527  */
528 
529 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
530                                                      struct ipv6_txoptions *opt,
531                                                      u8 *proto,
532                                                      struct in6_addr **daddr_p);
533 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
534                                                     struct ipv6_txoptions *opt,
535                                                     u8 *proto);
536 
537 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
538                                                  u8 *nexthdrp);
539 
540 extern int                      ipv6_ext_hdr(u8 nexthdr);
541 
542 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
543 
544 /*
545  *      socket options (ipv6_sockglue.c)
546  */
547 
548 extern int                      ipv6_setsockopt(struct sock *sk, int level, 
549                                                 int optname,
550                                                 char __user *optval, 
551                                                 unsigned int optlen);
552 extern int                      ipv6_getsockopt(struct sock *sk, int level, 
553                                                 int optname,
554                                                 char __user *optval, 
555                                                 int __user *optlen);
556 extern int                      compat_ipv6_setsockopt(struct sock *sk,
557                                                 int level,
558                                                 int optname,
559                                                 char __user *optval,
560                                                 unsigned int optlen);
561 extern int                      compat_ipv6_getsockopt(struct sock *sk,
562                                                 int level,
563                                                 int optname,
564                                                 char __user *optval,
565                                                 int __user *optlen);
566 
567 extern int                      ip6_datagram_connect(struct sock *sk, 
568                                                      struct sockaddr *addr, int addr_len);
569 
570 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
571                                                 int *addr_len);
572 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
573                                                 u32 info, u8 *payload);
574 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
575 
576 extern int inet6_release(struct socket *sock);
577 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 
578                       int addr_len);
579 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
580                          int *uaddr_len, int peer);
581 extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 
582                        unsigned long arg);
583 
584 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
585                               struct sock *sk);
586 
587 /*
588  * reassembly.c
589  */
590 extern const struct proto_ops inet6_stream_ops;
591 extern const struct proto_ops inet6_dgram_ops;
592 
593 struct group_source_req;
594 struct group_filter;
595 
596 extern int ip6_mc_source(int add, int omode, struct sock *sk,
597                          struct group_source_req *pgsr);
598 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
599 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
600                          struct group_filter __user *optval,
601                          int __user *optlen);
602 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
603                                     const struct in6_addr *daddr, u32 rnd);
604 
605 #ifdef CONFIG_PROC_FS
606 extern int  ac6_proc_init(struct net *net);
607 extern void ac6_proc_exit(struct net *net);
608 extern int  raw6_proc_init(void);
609 extern void raw6_proc_exit(void);
610 extern int  tcp6_proc_init(struct net *net);
611 extern void tcp6_proc_exit(struct net *net);
612 extern int  udp6_proc_init(struct net *net);
613 extern void udp6_proc_exit(struct net *net);
614 extern int  udplite6_proc_init(void);
615 extern void udplite6_proc_exit(void);
616 extern int  ipv6_misc_proc_init(void);
617 extern void ipv6_misc_proc_exit(void);
618 extern int snmp6_register_dev(struct inet6_dev *idev);
619 extern int snmp6_unregister_dev(struct inet6_dev *idev);
620 
621 #else
622 static inline int ac6_proc_init(struct net *net) { return 0; }
623 static inline void ac6_proc_exit(struct net *net) { }
624 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
625 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
626 #endif
627 
628 #ifdef CONFIG_SYSCTL
629 extern ctl_table ipv6_route_table_template[];
630 extern ctl_table ipv6_icmp_table_template[];
631 
632 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
633 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
634 extern int ipv6_sysctl_register(void);
635 extern void ipv6_sysctl_unregister(void);
636 extern int ipv6_static_sysctl_register(void);
637 extern void ipv6_static_sysctl_unregister(void);
638 #endif
639 
640 #endif /* __KERNEL__ */
641 #endif /* _NET_IPV6_H */
642 

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