include/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 #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(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(statname##_statistics, (field));       \
 119 })
 120
 121 #define _DEVADD(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(statname##_statistics, (field), (val));\
 127 })
 128
 129 /* MIBs */
 130 DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
 131
 132 #define IP6_INC_STATS(net, idev,field)  ({ (void)(net); \
 133                 _DEVINC(ipv6, , idev, field); })
 134 #define IP6_INC_STATS_BH(net, idev,field) ({ (void)(net); \
 135                 _DEVINC(ipv6, _BH, idev, field); })
 136 #define IP6_ADD_STATS_BH(net, idev,field,val) ({ (void)(net); \
 137                 _DEVADD(ipv6, _BH, idev, field, val); })
 138
 139 DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
 140 DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
 141
 142 #define ICMP6_INC_STATS(net, idev, field)       ({ (void)(net); \
 143                 _DEVINC(icmpv6, , idev, field); })
 144 #define ICMP6_INC_STATS_BH(net, idev, field)    ({ (void)(net); \
 145                 _DEVINC(icmpv6, _BH, idev, field); })
 146
 147 #define ICMP6MSGOUT_INC_STATS(net, idev, field) ({ (void)(net); \
 148         _DEVINC(icmpv6msg, , idev, field +256); })
 149 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) ({ (void)(net); \
 150         _DEVINC(icmpv6msg, _BH, idev, field +256); })
 151 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) ({ (void)(net); \
 152         _DEVINC(icmpv6msg, _BH, idev, field); })
 153
 154 struct ip6_ra_chain
 155 {
 156         struct ip6_ra_chain     *next;
 157         struct sock             *sk;
 158         int                     sel;
 159         void                    (*destructor)(struct sock *);
 160 };
 161
 162 extern struct ip6_ra_chain      *ip6_ra_chain;
 163 extern rwlock_t ip6_ra_lock;
 164
 165 /*
 166    This structure is prepared by protocol, when parsing
 167    ancillary data and passed to IPv6.
 168  */
 169
 170 struct ipv6_txoptions
 171 {
 172         /* Length of this structure */
 173         int                     tot_len;
 174
 175         /* length of extension headers   */
 176
 177         __u16                   opt_flen;       /* after fragment hdr */
 178         __u16                   opt_nflen;      /* before fragment hdr */
 179
 180         struct ipv6_opt_hdr     *hopopt;
 181         struct ipv6_opt_hdr     *dst0opt;
 182         struct ipv6_rt_hdr      *srcrt; /* Routing Header */
 183         struct ipv6_opt_hdr     *dst1opt;
 184
 185         /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
 186 };
 187
 188 struct ip6_flowlabel
 189 {
 190         struct ip6_flowlabel    *next;
 191         __be32                  label;
 192         atomic_t                users;
 193         struct in6_addr         dst;
 194         struct ipv6_txoptions   *opt;
 195         unsigned long           linger;
 196         u8                      share;
 197         u32                     owner;
 198         unsigned long           lastuse;
 199         unsigned long           expires;
 200         struct net              *fl_net;
 201 };
 202
 203 #define IPV6_FLOWINFO_MASK      __constant_htonl(0x0FFFFFFF)
 204 #define IPV6_FLOWLABEL_MASK     __constant_htonl(0x000FFFFF)
 205
 206 struct ipv6_fl_socklist
 207 {
 208         struct ipv6_fl_socklist *next;
 209         struct ip6_flowlabel    *fl;
 210 };
 211
 212 extern struct ip6_flowlabel     *fl6_sock_lookup(struct sock *sk, __be32 label);
 213 extern struct ipv6_txoptions    *fl6_merge_options(struct ipv6_txoptions * opt_space,
 214                                                    struct ip6_flowlabel * fl,
 215                                                    struct ipv6_txoptions * fopt);
 216 extern void                     fl6_free_socklist(struct sock *sk);
 217 extern int                      ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
 218 extern int                      ip6_flowlabel_init(void);
 219 extern void                     ip6_flowlabel_cleanup(void);
 220
 221 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 222 {
 223         if (fl)
 224                 atomic_dec(&fl->users);
 225 }
 226
 227 extern int                      ip6_ra_control(struct sock *sk, int sel);
 228
 229 extern int                      ipv6_parse_hopopts(struct sk_buff *skb);
 230
 231 extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
 232 extern struct ipv6_txoptions *  ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
 233                                                    int newtype,
 234                                                    struct ipv6_opt_hdr __user *newopt,
 235                                                    int newoptlen);
 236 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 237                                           struct ipv6_txoptions *opt);
 238
 239 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
 240
 241 int ip6_frag_nqueues(struct net *net);
 242 int ip6_frag_mem(struct net *net);
 243
 244 #define IPV6_FRAG_TIMEOUT       (60*HZ)         /* 60 seconds */
 245
 246 extern int __ipv6_addr_type(const struct in6_addr *addr);
 247 static inline int ipv6_addr_type(const struct in6_addr *addr)
 248 {
 249         return __ipv6_addr_type(addr) & 0xffff;
 250 }
 251
 252 static inline int ipv6_addr_scope(const struct in6_addr *addr)
 253 {
 254         return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
 255 }
 256
 257 static inline int __ipv6_addr_src_scope(int type)
 258 {
 259         return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
 260 }
 261
 262 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
 263 {
 264         return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
 265 }
 266
 267 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
 268 {
 269         return memcmp(a1, a2, sizeof(struct in6_addr));
 270 }
 271
 272 static inline int
 273 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
 274                      const struct in6_addr *a2)
 275 {
 276         return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
 277                    ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
 278                    ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
 279                    ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
 280 }
 281
 282 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
 283 {
 284         memcpy(a1, a2, sizeof(struct in6_addr));
 285 }
 286
 287 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
 288                                     const struct in6_addr *addr,
 289                                     int plen)
 290 {
 291         /* caller must guarantee 0 <= plen <= 128 */
 292         int o = plen >> 3,
 293             b = plen & 0x7;
 294
 295         memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
 296         memcpy(pfx->s6_addr, addr, o);
 297         if (b != 0)
 298                 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
 299 }
 300
 301 static inline void ipv6_addr_set(struct in6_addr *addr,
 302                                      __be32 w1, __be32 w2,
 303                                      __be32 w3, __be32 w4)
 304 {
 305         addr->s6_addr32[0] = w1;
 306         addr->s6_addr32[1] = w2;
 307         addr->s6_addr32[2] = w3;
 308         addr->s6_addr32[3] = w4;
 309 }
 310
 311 static inline int ipv6_addr_equal(const struct in6_addr *a1,
 312                                   const struct in6_addr *a2)
 313 {
 314         return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
 315                  (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
 316                  (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
 317                  (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
 318 }
 319
 320 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
 321                                       unsigned int prefixlen)
 322 {
 323         unsigned pdw, pbi;
 324
 325         /* check complete u32 in prefix */
 326         pdw = prefixlen >> 5;
 327         if (pdw && memcmp(a1, a2, pdw << 2))
 328                 return 0;
 329
 330         /* check incomplete u32 in prefix */
 331         pbi = prefixlen & 0x1f;
 332         if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
 333                 return 0;
 334
 335         return 1;
 336 }
 337
 338 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
 339                                     const struct in6_addr *a2,
 340                                     unsigned int prefixlen)
 341 {
 342         return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
 343                                    prefixlen);
 344 }
 345
 346 struct inet_frag_queue;
 347
 348 struct ip6_create_arg {
 349         __be32 id;
 350         struct in6_addr *src;
 351         struct in6_addr *dst;
 352 };
 353
 354 void ip6_frag_init(struct inet_frag_queue *q, void *a);
 355 int ip6_frag_match(struct inet_frag_queue *q, void *a);
 356
 357 static inline int ipv6_addr_any(const struct in6_addr *a)
 358 {
 359         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 360                  a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
 361 }
 362
 363 static inline int ipv6_addr_loopback(const struct in6_addr *a)
 364 {
 365         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 366                  a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
 367 }
 368
 369 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
 370 {
 371         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 372                  (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
 373 }
 374
 375 /*
 376  * Check for a RFC 4843 ORCHID address
 377  * (Overlay Routable Cryptographic Hash Identifiers)
 378  */
 379 static inline int ipv6_addr_orchid(const struct in6_addr *a)
 380 {
 381         return ((a->s6_addr32[0] & htonl(0xfffffff0))
 382                 == htonl(0x20010010));
 383 }
 384
 385 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
 386                                           struct in6_addr *v4mapped)
 387 {
 388         ipv6_addr_set(v4mapped,
 389                         0, 0,
 390                         htonl(0x0000FFFF),
 391                         addr);
 392 }
 393
 394 /*
 395  * find the first different bit between two addresses
 396  * length of address must be a multiple of 32bits
 397  */
 398 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
 399 {
 400         const __be32 *a1 = token1, *a2 = token2;
 401         int i;
 402
 403         addrlen >>= 2;
 404
 405         for (i = 0; i < addrlen; i++) {
 406                 __be32 xb = a1[i] ^ a2[i];
 407                 if (xb)
 408                         return i * 32 + 32 - fls(ntohl(xb));
 409         }
 410
 411         /*
 412          *      we should *never* get to this point since that
 413          *      would mean the addrs are equal
 414          *
 415          *      However, we do get to it 8) And exacly, when
 416          *      addresses are equal 8)
 417          *
 418          *      ip route add 1111::/128 via ...
 419          *      ip route add 1111::/64 via ...
 420          *      and we are here.
 421          *
 422          *      Ideally, this function should stop comparison
 423          *      at prefix length. It does not, but it is still OK,
 424          *      if returned value is greater than prefix length.
 425          *                                      --ANK (980803)
 426          */
 427         return (addrlen << 5);
 428 }
 429
 430 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
 431 {
 432         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
 433 }
 434
 435 /*
 436  *      Prototypes exported by ipv6
 437  */
 438
 439 /*
 440  *      rcv function (called from netdevice level)
 441  */
 442
 443 extern int                      ipv6_rcv(struct sk_buff *skb,
 444                                          struct net_device *dev,
 445                                          struct packet_type *pt,
 446                                          struct net_device *orig_dev);
 447
 448 extern int                      ip6_rcv_finish(struct sk_buff *skb);
 449
 450 /*
 451  *      upper-layer output functions
 452  */
 453 extern int                      ip6_xmit(struct sock *sk,
 454                                          struct sk_buff *skb,
 455                                          struct flowi *fl,
 456                                          struct ipv6_txoptions *opt,
 457                                          int ipfragok);
 458
 459 extern int                      ip6_nd_hdr(struct sock *sk,
 460                                            struct sk_buff *skb,
 461                                            struct net_device *dev,
 462                                            const struct in6_addr *saddr,
 463                                            const struct in6_addr *daddr,
 464                                            int proto, int len);
 465
 466 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 467
 468 extern int                      ip6_append_data(struct sock *sk,
 469                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
 470                                                 void *from,
 471                                                 int length,
 472                                                 int transhdrlen,
 473                                                 int hlimit,
 474                                                 int tclass,
 475                                                 struct ipv6_txoptions *opt,
 476                                                 struct flowi *fl,
 477                                                 struct rt6_info *rt,
 478                                                 unsigned int flags);
 479
 480 extern int                      ip6_push_pending_frames(struct sock *sk);
 481
 482 extern void                     ip6_flush_pending_frames(struct sock *sk);
 483
 484 extern int                      ip6_dst_lookup(struct sock *sk,
 485                                                struct dst_entry **dst,
 486                                                struct flowi *fl);
 487 extern int                      ip6_dst_blackhole(struct sock *sk,
 488                                                   struct dst_entry **dst,
 489                                                   struct flowi *fl);
 490 extern int                      ip6_sk_dst_lookup(struct sock *sk,
 491                                                   struct dst_entry **dst,
 492                                                   struct flowi *fl);
 493
 494 /*
 495  *      skb processing functions
 496  */
 497
 498 extern int                      ip6_output(struct sk_buff *skb);
 499 extern int                      ip6_forward(struct sk_buff *skb);
 500 extern int                      ip6_input(struct sk_buff *skb);
 501 extern int                      ip6_mc_input(struct sk_buff *skb);
 502
 503 extern int                      __ip6_local_out(struct sk_buff *skb);
 504 extern int                      ip6_local_out(struct sk_buff *skb);
 505
 506 /*
 507  *      Extension header (options) processing
 508  */
 509
 510 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
 511                                                      struct ipv6_txoptions *opt,
 512                                                      u8 *proto,
 513                                                      struct in6_addr **daddr_p);
 514 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
 515                                                     struct ipv6_txoptions *opt,
 516                                                     u8 *proto);
 517
 518 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
 519                                                  u8 *nexthdrp);
 520
 521 extern int                      ipv6_ext_hdr(u8 nexthdr);
 522
 523 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
 524
 525 /*
 526  *      socket options (ipv6_sockglue.c)
 527  */
 528
 529 extern int                      ipv6_setsockopt(struct sock *sk, int level,
 530                                                 int optname,
 531                                                 char __user *optval,
 532                                                 int optlen);
 533 extern int                      ipv6_getsockopt(struct sock *sk, int level,
 534                                                 int optname,
 535                                                 char __user *optval,
 536                                                 int __user *optlen);
 537 extern int                      compat_ipv6_setsockopt(struct sock *sk,
 538                                                 int level,
 539                                                 int optname,
 540                                                 char __user *optval,
 541                                                 int optlen);
 542 extern int                      compat_ipv6_getsockopt(struct sock *sk,
 543                                                 int level,
 544                                                 int optname,
 545                                                 char __user *optval,
 546                                                 int __user *optlen);
 547
 548 extern int                      ip6_datagram_connect(struct sock *sk,
 549                                                      struct sockaddr *addr, int addr_len);
 550
 551 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
 552 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
 553                                                 u32 info, u8 *payload);
 554 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 555
 556 extern int inet6_release(struct socket *sock);
 557 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
 558                       int addr_len);
 559 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 560                          int *uaddr_len, int peer);
 561 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
 562                        unsigned long arg);
 563
 564 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 565                               struct sock *sk);
 566
 567 /*
 568  * reassembly.c
 569  */
 570 extern const struct proto_ops inet6_stream_ops;
 571 extern const struct proto_ops inet6_dgram_ops;
 572
 573 struct group_source_req;
 574 struct group_filter;
 575
 576 extern int ip6_mc_source(int add, int omode, struct sock *sk,
 577                          struct group_source_req *pgsr);
 578 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
 579 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 580                          struct group_filter __user *optval,
 581                          int __user *optlen);
 582 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
 583                                     const struct in6_addr *daddr, u32 rnd);
 584
 585 #ifdef CONFIG_PROC_FS
 586 extern int  ac6_proc_init(struct net *net);
 587 extern void ac6_proc_exit(struct net *net);
 588 extern int  raw6_proc_init(void);
 589 extern void raw6_proc_exit(void);
 590 extern int  tcp6_proc_init(struct net *net);
 591 extern void tcp6_proc_exit(struct net *net);
 592 extern int  udp6_proc_init(struct net *net);
 593 extern void udp6_proc_exit(struct net *net);
 594 extern int  udplite6_proc_init(void);
 595 extern void udplite6_proc_exit(void);
 596 extern int  ipv6_misc_proc_init(void);
 597 extern void ipv6_misc_proc_exit(void);
 598 extern int snmp6_register_dev(struct inet6_dev *idev);
 599 extern int snmp6_unregister_dev(struct inet6_dev *idev);
 600
 601 #else
 602 static inline int ac6_proc_init(struct net *net) { return 0; }
 603 static inline void ac6_proc_exit(struct net *net) { }
 604 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
 605 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
 606 #endif
 607
 608 #ifdef CONFIG_SYSCTL
 609 extern ctl_table ipv6_route_table_template[];
 610 extern ctl_table ipv6_icmp_table_template[];
 611
 612 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 613 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 614 extern int ipv6_sysctl_register(void);
 615 extern void ipv6_sysctl_unregister(void);
 616 extern int ipv6_static_sysctl_register(void);
 617 extern void ipv6_static_sysctl_unregister(void);
 618 #endif
 619
 620 #endif /* __KERNEL__ */
 621 #endif /* _NET_IPV6_H */