include/net/ipv6.h

   1 /*
   2  *      Linux INET6 implementation
   3  *
   4  *      Authors:
   5  *      Pedro Roque             <roque@di.fc.ul.pt>
   6  *
   7  *      $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _NET_IPV6_H
  16 #define _NET_IPV6_H
  17
  18 #include <linux/ipv6.h>
  19 #include <linux/hardirq.h>
  20 #include <net/if_inet6.h>
  21 #include <net/ndisc.h>
  22 #include <net/flow.h>
  23 #include <net/snmp.h>
  24
  25 #define SIN6_LEN_RFC2133        24
  26
  27 #define IPV6_MAXPLEN            65535
  28
  29 /*
  30  *      NextHeader field of IPv6 header
  31  */
  32
  33 #define NEXTHDR_HOP             0       /* Hop-by-hop option header. */
  34 #define NEXTHDR_TCP             6       /* TCP segment. */
  35 #define NEXTHDR_UDP             17      /* UDP message. */
  36 #define NEXTHDR_IPV6            41      /* IPv6 in IPv6 */
  37 #define NEXTHDR_ROUTING         43      /* Routing header. */
  38 #define NEXTHDR_FRAGMENT        44      /* Fragmentation/reassembly header. */
  39 #define NEXTHDR_ESP             50      /* Encapsulating security payload. */
  40 #define NEXTHDR_AUTH            51      /* Authentication header. */
  41 #define NEXTHDR_ICMP            58      /* ICMP for IPv6. */
  42 #define NEXTHDR_NONE            59      /* No next header */
  43 #define NEXTHDR_DEST            60      /* Destination options header. */
  44 #define NEXTHDR_MOBILITY        135     /* Mobility header. */
  45
  46 #define NEXTHDR_MAX             255
  47
  48
  49
  50 #define IPV6_DEFAULT_HOPLIMIT   64
  51 #define IPV6_DEFAULT_MCASTHOPS  1
  52
  53 /*
  54  *      Addr type
  55  *
  56  *      type    -       unicast | multicast
  57  *      scope   -       local   | site      | global
  58  *      v4      -       compat
  59  *      v4mapped
  60  *      any
  61  *      loopback
  62  */
  63
  64 #define IPV6_ADDR_ANY           0x0000U
  65
  66 #define IPV6_ADDR_UNICAST       0x0001U
  67 #define IPV6_ADDR_MULTICAST     0x0002U
  68
  69 #define IPV6_ADDR_LOOPBACK      0x0010U
  70 #define IPV6_ADDR_LINKLOCAL     0x0020U
  71 #define IPV6_ADDR_SITELOCAL     0x0040U
  72
  73 #define IPV6_ADDR_COMPATv4      0x0080U
  74
  75 #define IPV6_ADDR_SCOPE_MASK    0x00f0U
  76
  77 #define IPV6_ADDR_MAPPED        0x1000U
  78 #define IPV6_ADDR_RESERVED      0x2000U /* reserved address space */
  79
  80 /*
  81  *      Addr scopes
  82  */
  83 #ifdef __KERNEL__
  84 #define IPV6_ADDR_MC_SCOPE(a)   \
  85         ((a)->s6_addr[1] & 0x0f)        /* nonstandard */
  86 #define __IPV6_ADDR_SCOPE_INVALID       -1
  87 #endif
  88 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  89 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  90 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  91 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08
  92 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  93
  94 /*
  95  *      fragmentation header
  96  */
  97
  98 struct frag_hdr {
  99         __u8    nexthdr;
 100         __u8    reserved;
 101         __be16  frag_off;
 102         __be32  identification;
 103 };
 104
 105 #define IP6_MF  0x0001
 106
 107 #ifdef __KERNEL__
 108
 109 #include <net/sock.h>
 110
 111 /* sysctls */
 112 extern int sysctl_mld_max_msf;
 113 extern struct ctl_path net_ipv6_ctl_path[];
 114
 115 #define _DEVINC(statname, modifier, idev, field)                        \
 116 ({                                                                      \
 117         struct inet6_dev *_idev = (idev);                               \
 118         if (likely(_idev != NULL))                                      \
 119                 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
 120         SNMP_INC_STATS##modifier(statname##_statistics, (field));       \
 121 })
 122
 123 #define _DEVADD(statname, modifier, idev, field, val)                   \
 124 ({                                                                      \
 125         struct inet6_dev *_idev = (idev);                               \
 126         if (likely(_idev != NULL))                                      \
 127                 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
 128         SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\
 129 })
 130
 131 /* MIBs */
 132 DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
 133
 134 #define IP6_INC_STATS(idev,field)       _DEVINC(ipv6, , idev, field)
 135 #define IP6_INC_STATS_BH(idev,field)    _DEVINC(ipv6, _BH, idev, field)
 136 #define IP6_INC_STATS_USER(idev,field)  _DEVINC(ipv6, _USER, idev, field)
 137 #define IP6_ADD_STATS_BH(idev,field,val) _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(idev, field)    _DEVINC(icmpv6, , idev, field)
 143 #define ICMP6_INC_STATS_BH(idev, field) _DEVINC(icmpv6, _BH, idev, field)
 144 #define ICMP6_INC_STATS_USER(idev, field) _DEVINC(icmpv6, _USER, idev, field)
 145
 146 #define ICMP6MSGOUT_INC_STATS(idev, field) \
 147         _DEVINC(icmpv6msg, , idev, field +256)
 148 #define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
 149         _DEVINC(icmpv6msg, _BH, idev, field +256)
 150 #define ICMP6MSGOUT_INC_STATS_USER(idev, field) \
 151         _DEVINC(icmpv6msg, _USER, idev, field +256)
 152 #define ICMP6MSGIN_INC_STATS(idev, field) \
 153          _DEVINC(icmpv6msg, , idev, field)
 154 #define ICMP6MSGIN_INC_STATS_BH(idev, field) \
 155         _DEVINC(icmpv6msg, _BH, idev, field)
 156 #define ICMP6MSGIN_INC_STATS_USER(idev, field) \
 157         _DEVINC(icmpv6msg, _USER, idev, field)
 158
 159 struct ip6_ra_chain
 160 {
 161         struct ip6_ra_chain     *next;
 162         struct sock             *sk;
 163         int                     sel;
 164         void                    (*destructor)(struct sock *);
 165 };
 166
 167 extern struct ip6_ra_chain      *ip6_ra_chain;
 168 extern rwlock_t ip6_ra_lock;
 169
 170 /*
 171    This structure is prepared by protocol, when parsing
 172    ancillary data and passed to IPv6.
 173  */
 174
 175 struct ipv6_txoptions
 176 {
 177         /* Length of this structure */
 178         int                     tot_len;
 179
 180         /* length of extension headers   */
 181
 182         __u16                   opt_flen;       /* after fragment hdr */
 183         __u16                   opt_nflen;      /* before fragment hdr */
 184
 185         struct ipv6_opt_hdr     *hopopt;
 186         struct ipv6_opt_hdr     *dst0opt;
 187         struct ipv6_rt_hdr      *srcrt; /* Routing Header */
 188         struct ipv6_opt_hdr     *dst1opt;
 189
 190         /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
 191 };
 192
 193 struct ip6_flowlabel
 194 {
 195         struct ip6_flowlabel    *next;
 196         __be32                  label;
 197         atomic_t                users;
 198         struct in6_addr         dst;
 199         struct ipv6_txoptions   *opt;
 200         unsigned long           linger;
 201         u8                      share;
 202         u32                     owner;
 203         unsigned long           lastuse;
 204         unsigned long           expires;
 205 };
 206
 207 #define IPV6_FLOWINFO_MASK      __constant_htonl(0x0FFFFFFF)
 208 #define IPV6_FLOWLABEL_MASK     __constant_htonl(0x000FFFFF)
 209
 210 struct ipv6_fl_socklist
 211 {
 212         struct ipv6_fl_socklist *next;
 213         struct ip6_flowlabel    *fl;
 214 };
 215
 216 extern struct ip6_flowlabel     *fl6_sock_lookup(struct sock *sk, __be32 label);
 217 extern struct ipv6_txoptions    *fl6_merge_options(struct ipv6_txoptions * opt_space,
 218                                                    struct ip6_flowlabel * fl,
 219                                                    struct ipv6_txoptions * fopt);
 220 extern void                     fl6_free_socklist(struct sock *sk);
 221 extern int                      ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
 222 extern int                      ip6_flowlabel_init(void);
 223 extern void                     ip6_flowlabel_cleanup(void);
 224
 225 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 226 {
 227         if (fl)
 228                 atomic_dec(&fl->users);
 229 }
 230
 231 extern int                      ip6_ra_control(struct sock *sk, int sel,
 232                                                void (*destructor)(struct sock *));
 233
 234
 235 extern int                      ipv6_parse_hopopts(struct sk_buff *skb);
 236
 237 extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
 238 extern struct ipv6_txoptions *  ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
 239                                                    int newtype,
 240                                                    struct ipv6_opt_hdr __user *newopt,
 241                                                    int newoptlen);
 242 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 243                                           struct ipv6_txoptions *opt);
 244
 245 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
 246
 247 int ip6_frag_nqueues(struct net *net);
 248 int ip6_frag_mem(struct net *net);
 249
 250 #define IPV6_FRAG_TIMEOUT       (60*HZ)         /* 60 seconds */
 251
 252 /*
 253  *      Function prototype for build_xmit
 254  */
 255
 256 typedef int             (*inet_getfrag_t) (const void *data,
 257                                            struct in6_addr *addr,
 258                                            char *,
 259                                            unsigned int, unsigned int);
 260
 261 extern int __ipv6_addr_type(const struct in6_addr *addr);
 262 static inline int ipv6_addr_type(const struct in6_addr *addr)
 263 {
 264         return __ipv6_addr_type(addr) & 0xffff;
 265 }
 266
 267 static inline int ipv6_addr_scope(const struct in6_addr *addr)
 268 {
 269         return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
 270 }
 271
 272 static inline int __ipv6_addr_src_scope(int type)
 273 {
 274         return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
 275 }
 276
 277 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
 278 {
 279         return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
 280 }
 281
 282 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
 283 {
 284         return memcmp(a1, a2, sizeof(struct in6_addr));
 285 }
 286
 287 static inline int
 288 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
 289                      const struct in6_addr *a2)
 290 {
 291         unsigned int i;
 292
 293         for (i = 0; i < 4; i++)
 294                 if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
 295                         return 1;
 296         return 0;
 297 }
 298
 299 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
 300 {
 301         memcpy(a1, a2, sizeof(struct in6_addr));
 302 }
 303
 304 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
 305                                     const struct in6_addr *addr,
 306                                     int plen)
 307 {
 308         /* caller must guarantee 0 <= plen <= 128 */
 309         int o = plen >> 3,
 310             b = plen & 0x7;
 311
 312         memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
 313         memcpy(pfx->s6_addr, addr, o);
 314         if (b != 0)
 315                 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
 316 }
 317
 318 static inline void ipv6_addr_set(struct in6_addr *addr,
 319                                      __be32 w1, __be32 w2,
 320                                      __be32 w3, __be32 w4)
 321 {
 322         addr->s6_addr32[0] = w1;
 323         addr->s6_addr32[1] = w2;
 324         addr->s6_addr32[2] = w3;
 325         addr->s6_addr32[3] = w4;
 326 }
 327
 328 static inline int ipv6_addr_equal(const struct in6_addr *a1,
 329                                   const struct in6_addr *a2)
 330 {
 331         return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
 332                 a1->s6_addr32[1] == a2->s6_addr32[1] &&
 333                 a1->s6_addr32[2] == a2->s6_addr32[2] &&
 334                 a1->s6_addr32[3] == a2->s6_addr32[3]);
 335 }
 336
 337 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
 338                                       unsigned int prefixlen)
 339 {
 340         unsigned pdw, pbi;
 341
 342         /* check complete u32 in prefix */
 343         pdw = prefixlen >> 5;
 344         if (pdw && memcmp(a1, a2, pdw << 2))
 345                 return 0;
 346
 347         /* check incomplete u32 in prefix */
 348         pbi = prefixlen & 0x1f;
 349         if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
 350                 return 0;
 351
 352         return 1;
 353 }
 354
 355 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
 356                                     const struct in6_addr *a2,
 357                                     unsigned int prefixlen)
 358 {
 359         return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
 360                                    prefixlen);
 361 }
 362
 363 struct inet_frag_queue;
 364
 365 struct ip6_create_arg {
 366         __be32 id;
 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_v4mapped(const struct in6_addr *a)
 381 {
 382         return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 &&
 383                  a->s6_addr32[2] == htonl(0x0000ffff));
 384 }
 385
 386 /*
 387  * Check for a RFC 4843 ORCHID address
 388  * (Overlay Routable Cryptographic Hash Identifiers)
 389  */
 390 static inline int ipv6_addr_orchid(const struct in6_addr *a)
 391 {
 392         return ((a->s6_addr32[0] & htonl(0xfffffff0))
 393                 == htonl(0x20010010));
 394 }
 395
 396 /*
 397  * find the first different bit between two addresses
 398  * length of address must be a multiple of 32bits
 399  */
 400 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
 401 {
 402         const __be32 *a1 = token1, *a2 = token2;
 403         int i;
 404
 405         addrlen >>= 2;
 406
 407         for (i = 0; i < addrlen; i++) {
 408                 __be32 xb = a1[i] ^ a2[i];
 409                 if (xb)
 410                         return i * 32 + 32 - fls(ntohl(xb));
 411         }
 412
 413         /*
 414          *      we should *never* get to this point since that
 415          *      would mean the addrs are equal
 416          *
 417          *      However, we do get to it 8) And exacly, when
 418          *      addresses are equal 8)
 419          *
 420          *      ip route add 1111::/128 via ...
 421          *      ip route add 1111::/64 via ...
 422          *      and we are here.
 423          *
 424          *      Ideally, this function should stop comparison
 425          *      at prefix length. It does not, but it is still OK,
 426          *      if returned value is greater than prefix length.
 427          *                                      --ANK (980803)
 428          */
 429         return (addrlen << 5);
 430 }
 431
 432 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
 433 {
 434         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
 435 }
 436
 437 /*
 438  *      Prototypes exported by ipv6
 439  */
 440
 441 /*
 442  *      rcv function (called from netdevice level)
 443  */
 444
 445 extern int                      ipv6_rcv(struct sk_buff *skb,
 446                                          struct net_device *dev,
 447                                          struct packet_type *pt,
 448                                          struct net_device *orig_dev);
 449
 450 extern int                      ip6_rcv_finish(struct sk_buff *skb);
 451
 452 /*
 453  *      upper-layer output functions
 454  */
 455 extern int                      ip6_xmit(struct sock *sk,
 456                                          struct sk_buff *skb,
 457                                          struct flowi *fl,
 458                                          struct ipv6_txoptions *opt,
 459                                          int ipfragok);
 460
 461 extern int                      ip6_nd_hdr(struct sock *sk,
 462                                            struct sk_buff *skb,
 463                                            struct net_device *dev,
 464                                            struct in6_addr *saddr,
 465                                            struct in6_addr *daddr,
 466                                            int proto, int len);
 467
 468 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 469
 470 extern int                      ip6_append_data(struct sock *sk,
 471                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
 472                                                 void *from,
 473                                                 int length,
 474                                                 int transhdrlen,
 475                                                 int hlimit,
 476                                                 int tclass,
 477                                                 struct ipv6_txoptions *opt,
 478                                                 struct flowi *fl,
 479                                                 struct rt6_info *rt,
 480                                                 unsigned int flags);
 481
 482 extern int                      ip6_push_pending_frames(struct sock *sk);
 483
 484 extern void                     ip6_flush_pending_frames(struct sock *sk);
 485
 486 extern int                      ip6_dst_lookup(struct sock *sk,
 487                                                struct dst_entry **dst,
 488                                                struct flowi *fl);
 489 extern int                      ip6_dst_blackhole(struct sock *sk,
 490                                                   struct dst_entry **dst,
 491                                                   struct flowi *fl);
 492 extern int                      ip6_sk_dst_lookup(struct sock *sk,
 493                                                   struct dst_entry **dst,
 494                                                   struct flowi *fl);
 495
 496 /*
 497  *      skb processing functions
 498  */
 499
 500 extern int                      ip6_output(struct sk_buff *skb);
 501 extern int                      ip6_forward(struct sk_buff *skb);
 502 extern int                      ip6_input(struct sk_buff *skb);
 503 extern int                      ip6_mc_input(struct sk_buff *skb);
 504
 505 extern int                      __ip6_local_out(struct sk_buff *skb);
 506 extern int                      ip6_local_out(struct sk_buff *skb);
 507
 508 /*
 509  *      Extension header (options) processing
 510  */
 511
 512 extern u8 *                     ipv6_build_nfrag_opts(struct sk_buff *skb,
 513                                                       u8 *prev_hdr,
 514                                                       struct ipv6_txoptions *opt,
 515                                                       struct in6_addr *daddr,
 516                                                       u32 jumbolen);
 517 extern u8 *                     ipv6_build_frag_opts(struct sk_buff *skb,
 518                                                      u8 *prev_hdr,
 519                                                      struct ipv6_txoptions *opt);
 520 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
 521                                                      struct ipv6_txoptions *opt,
 522                                                      u8 *proto,
 523                                                      struct in6_addr **daddr_p);
 524 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
 525                                                     struct ipv6_txoptions *opt,
 526                                                     u8 *proto);
 527
 528 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
 529                                                  u8 *nexthdrp);
 530
 531 extern int                      ipv6_ext_hdr(u8 nexthdr);
 532
 533 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
 534
 535 /*
 536  *      socket options (ipv6_sockglue.c)
 537  */
 538
 539 extern int                      ipv6_setsockopt(struct sock *sk, int level,
 540                                                 int optname,
 541                                                 char __user *optval,
 542                                                 int optlen);
 543 extern int                      ipv6_getsockopt(struct sock *sk, int level,
 544                                                 int optname,
 545                                                 char __user *optval,
 546                                                 int __user *optlen);
 547 extern int                      compat_ipv6_setsockopt(struct sock *sk,
 548                                                 int level,
 549                                                 int optname,
 550                                                 char __user *optval,
 551                                                 int optlen);
 552 extern int                      compat_ipv6_getsockopt(struct sock *sk,
 553                                                 int level,
 554                                                 int optname,
 555                                                 char __user *optval,
 556                                                 int __user *optlen);
 557
 558 extern int                      ip6_datagram_connect(struct sock *sk,
 559                                                      struct sockaddr *addr, int addr_len);
 560
 561 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
 562 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
 563                                                 u32 info, u8 *payload);
 564 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 565
 566 extern int inet6_release(struct socket *sock);
 567 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
 568                       int addr_len);
 569 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 570                          int *uaddr_len, int peer);
 571 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
 572                        unsigned long arg);
 573
 574 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 575                               struct sock *sk);
 576
 577 /*
 578  * reassembly.c
 579  */
 580 extern const struct proto_ops inet6_stream_ops;
 581 extern const struct proto_ops inet6_dgram_ops;
 582
 583 struct group_source_req;
 584 struct group_filter;
 585
 586 extern int ip6_mc_source(int add, int omode, struct sock *sk,
 587                          struct group_source_req *pgsr);
 588 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
 589 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 590                          struct group_filter __user *optval,
 591                          int __user *optlen);
 592
 593 #ifdef CONFIG_PROC_FS
 594 extern int  ac6_proc_init(void);
 595 extern void ac6_proc_exit(void);
 596 extern int  raw6_proc_init(void);
 597 extern void raw6_proc_exit(void);
 598 extern int  tcp6_proc_init(void);
 599 extern void tcp6_proc_exit(void);
 600 extern int  udp6_proc_init(void);
 601 extern void udp6_proc_exit(void);
 602 #ifdef CONFIG_IP_UDPLITE
 603 extern int  udplite6_proc_init(void);
 604 extern void udplite6_proc_exit(void);
 605 #else
 606 static inline int udplite6_proc_init(void) { return 0; }
 607 static inline void udplite6_proc_exit(void) { }
 608 #endif
 609 extern int  ipv6_misc_proc_init(void);
 610 extern void ipv6_misc_proc_exit(void);
 611 extern int snmp6_register_dev(struct inet6_dev *idev);
 612 extern int snmp6_unregister_dev(struct inet6_dev *idev);
 613
 614 #else
 615 static inline int snmp6_register_dev(struct inet6_dev *idev)
 616 {
 617         return 0;
 618 }
 619
 620 static inline int snmp6_unregister_dev(struct inet6_dev *idev)
 621 {
 622         return 0;
 623 }
 624 #endif
 625
 626 #ifdef CONFIG_SYSCTL
 627 extern ctl_table ipv6_route_table_template[];
 628 extern ctl_table ipv6_icmp_table_template[];
 629
 630 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 631 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 632 extern int ipv6_sysctl_register(void);
 633 extern void ipv6_sysctl_unregister(void);
 634 #endif
 635
 636 #endif /* __KERNEL__ */
 637 #endif /* _NET_IPV6_H */