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/ndisc.h>
  21 #include <net/flow.h>
  22 #include <net/snmp.h>
  23
  24 #define SIN6_LEN_RFC2133        24
  25
  26 #define IPV6_MAXPLEN            65535
  27
  28 /*
  29  *      NextHeader field of IPv6 header
  30  */
  31
  32 #define NEXTHDR_HOP             0       /* Hop-by-hop option header. */
  33 #define NEXTHDR_TCP             6       /* TCP segment. */
  34 #define NEXTHDR_UDP             17      /* UDP message. */
  35 #define NEXTHDR_IPV6            41      /* IPv6 in IPv6 */
  36 #define NEXTHDR_ROUTING         43      /* Routing header. */
  37 #define NEXTHDR_FRAGMENT        44      /* Fragmentation/reassembly header. */
  38 #define NEXTHDR_ESP             50      /* Encapsulating security payload. */
  39 #define NEXTHDR_AUTH            51      /* Authentication header. */
  40 #define NEXTHDR_ICMP            58      /* ICMP for IPv6. */
  41 #define NEXTHDR_NONE            59      /* No next header */
  42 #define NEXTHDR_DEST            60      /* Destination options header. */
  43 #define NEXTHDR_MOBILITY        135     /* Mobility header. */
  44
  45 #define NEXTHDR_MAX             255
  46
  47
  48
  49 #define IPV6_DEFAULT_HOPLIMIT   64
  50 #define IPV6_DEFAULT_MCASTHOPS  1
  51
  52 /*
  53  *      Addr type
  54  *
  55  *      type    -       unicast | multicast
  56  *      scope   -       local   | site      | global
  57  *      v4      -       compat
  58  *      v4mapped
  59  *      any
  60  *      loopback
  61  */
  62
  63 #define IPV6_ADDR_ANY           0x0000U
  64
  65 #define IPV6_ADDR_UNICAST       0x0001U
  66 #define IPV6_ADDR_MULTICAST     0x0002U
  67
  68 #define IPV6_ADDR_LOOPBACK      0x0010U
  69 #define IPV6_ADDR_LINKLOCAL     0x0020U
  70 #define IPV6_ADDR_SITELOCAL     0x0040U
  71
  72 #define IPV6_ADDR_COMPATv4      0x0080U
  73
  74 #define IPV6_ADDR_SCOPE_MASK    0x00f0U
  75
  76 #define IPV6_ADDR_MAPPED        0x1000U
  77 #define IPV6_ADDR_RESERVED      0x2000U /* reserved address space */
  78
  79 /*
  80  *      Addr scopes
  81  */
  82 #ifdef __KERNEL__
  83 #define IPV6_ADDR_MC_SCOPE(a)   \
  84         ((a)->s6_addr[1] & 0x0f)        /* nonstandard */
  85 #define __IPV6_ADDR_SCOPE_INVALID       -1
  86 #endif
  87 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  88 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  89 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  90 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08
  91 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  92
  93 /*
  94  *      fragmentation header
  95  */
  96
  97 struct frag_hdr {
  98         __u8    nexthdr;
  99         __u8    reserved;
 100         __be16  frag_off;
 101         __be32  identification;
 102 };
 103
 104 #define IP6_MF  0x0001
 105
 106 #ifdef __KERNEL__
 107
 108 #include <net/sock.h>
 109
 110 /* sysctls */
 111 extern int sysctl_ipv6_bindv6only;
 112 extern int sysctl_mld_max_msf;
 113
 114 /* MIBs */
 115 DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
 116 #define IP6_INC_STATS(idev,field)               ({                      \
 117         struct inet6_dev *_idev = (idev);                               \
 118         if (likely(_idev != NULL))                                      \
 119                 SNMP_INC_STATS(_idev->stats.ipv6, field);               \
 120         SNMP_INC_STATS(ipv6_statistics, field);                         \
 121 })
 122 #define IP6_INC_STATS_BH(idev,field)            ({                      \
 123         struct inet6_dev *_idev = (idev);                               \
 124         if (likely(_idev != NULL))                                      \
 125                 SNMP_INC_STATS_BH(_idev->stats.ipv6, field);            \
 126         SNMP_INC_STATS_BH(ipv6_statistics, field);                      \
 127 })
 128 #define IP6_INC_STATS_USER(idev,field)          ({                      \
 129         struct inet6_dev *_idev = (idev);                               \
 130         if (likely(_idev != NULL))                                      \
 131                 SNMP_INC_STATS_USER(_idev->stats.ipv6, field);          \
 132         SNMP_INC_STATS_USER(ipv6_statistics, field);                    \
 133 })
 134 DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
 135 #define ICMP6_INC_STATS(idev, field)            ({                      \
 136         struct inet6_dev *_idev = (idev);                               \
 137         if (likely(_idev != NULL))                                      \
 138                 SNMP_INC_STATS(idev->stats.icmpv6, field);              \
 139         SNMP_INC_STATS(icmpv6_statistics, field);                       \
 140 })
 141 #define ICMP6_INC_STATS_BH(idev, field)         ({                      \
 142         struct inet6_dev *_idev = (idev);                               \
 143         if (likely(_idev != NULL))                                      \
 144                 SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field);        \
 145         SNMP_INC_STATS_BH(icmpv6_statistics, field);                    \
 146 })
 147 #define ICMP6_INC_STATS_USER(idev, field)       ({                      \
 148         struct inet6_dev *_idev = (idev);                               \
 149         if (likely(_idev != NULL))                                      \
 150                 SNMP_INC_STATS_USER(_idev->stats.icmpv6, field);        \
 151         SNMP_INC_STATS_USER(icmpv6_statistics, field);                  \
 152 })
 153 #define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset)  ({                      \
 154         struct inet6_dev *_idev = idev;                                         \
 155         __typeof__(offset) _offset = (offset);                                  \
 156         if (likely(_idev != NULL))                                              \
 157                 SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset);  \
 158         SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset);            \
 159 })
 160 DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
 161 DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
 162 #define UDP6_INC_STATS_BH(field, is_udplite)                          do  {  \
 163         if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field);         \
 164         else            SNMP_INC_STATS_BH(udp_stats_in6, field);    } while(0)
 165 #define UDP6_INC_STATS_USER(field, is_udplite)                         do {    \
 166         if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field);         \
 167         else            SNMP_INC_STATS_USER(udp_stats_in6, field);    } while(0)
 168
 169 int snmp6_register_dev(struct inet6_dev *idev);
 170 int snmp6_unregister_dev(struct inet6_dev *idev);
 171 int snmp6_alloc_dev(struct inet6_dev *idev);
 172 int snmp6_free_dev(struct inet6_dev *idev);
 173 int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);
 174 void snmp6_mib_free(void *ptr[2]);
 175
 176 struct ip6_ra_chain
 177 {
 178         struct ip6_ra_chain     *next;
 179         struct sock             *sk;
 180         int                     sel;
 181         void                    (*destructor)(struct sock *);
 182 };
 183
 184 extern struct ip6_ra_chain      *ip6_ra_chain;
 185 extern 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
 192 struct ipv6_txoptions
 193 {
 194         /* Length of this structure */
 195         int                     tot_len;
 196
 197         /* length of extension headers   */
 198
 199         __u16                   opt_flen;       /* after fragment hdr */
 200         __u16                   opt_nflen;      /* before fragment hdr */
 201
 202         struct ipv6_opt_hdr     *hopopt;
 203         struct ipv6_opt_hdr     *dst0opt;
 204         struct ipv6_rt_hdr      *srcrt; /* Routing Header */
 205         struct ipv6_opt_hdr     *dst1opt;
 206
 207         /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
 208 };
 209
 210 struct ip6_flowlabel
 211 {
 212         struct ip6_flowlabel    *next;
 213         __be32                  label;
 214         struct in6_addr         dst;
 215         struct ipv6_txoptions   *opt;
 216         atomic_t                users;
 217         unsigned long           linger;
 218         u8                      share;
 219         u32                     owner;
 220         unsigned long           lastuse;
 221         unsigned long           expires;
 222 };
 223
 224 #define IPV6_FLOWINFO_MASK      __constant_htonl(0x0FFFFFFF)
 225 #define IPV6_FLOWLABEL_MASK     __constant_htonl(0x000FFFFF)
 226
 227 struct ipv6_fl_socklist
 228 {
 229         struct ipv6_fl_socklist *next;
 230         struct ip6_flowlabel    *fl;
 231 };
 232
 233 extern struct ip6_flowlabel     *fl6_sock_lookup(struct sock *sk, __be32 label);
 234 extern struct ipv6_txoptions    *fl6_merge_options(struct ipv6_txoptions * opt_space,
 235                                                    struct ip6_flowlabel * fl,
 236                                                    struct ipv6_txoptions * fopt);
 237 extern void                     fl6_free_socklist(struct sock *sk);
 238 extern int                      ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
 239 extern void                     ip6_flowlabel_init(void);
 240 extern void                     ip6_flowlabel_cleanup(void);
 241
 242 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 243 {
 244         if (fl)
 245                 atomic_dec(&fl->users);
 246 }
 247
 248 extern int                      ip6_ra_control(struct sock *sk, int sel,
 249                                                void (*destructor)(struct sock *));
 250
 251
 252 extern int                      ipv6_parse_hopopts(struct sk_buff **skbp);
 253
 254 extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
 255 extern struct ipv6_txoptions *  ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
 256                                                    int newtype,
 257                                                    struct ipv6_opt_hdr __user *newopt,
 258                                                    int newoptlen);
 259 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 260                                           struct ipv6_txoptions *opt);
 261
 262 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
 263
 264 extern int ip6_frag_nqueues;
 265 extern atomic_t ip6_frag_mem;
 266
 267 #define IPV6_FRAG_TIMEOUT       (60*HZ)         /* 60 seconds */
 268
 269 /*
 270  *      Function prototype for build_xmit
 271  */
 272
 273 typedef int             (*inet_getfrag_t) (const void *data,
 274                                            struct in6_addr *addr,
 275                                            char *,
 276                                            unsigned int, unsigned int);
 277
 278 extern int __ipv6_addr_type(const struct in6_addr *addr);
 279 static inline int ipv6_addr_type(const struct in6_addr *addr)
 280 {
 281         return __ipv6_addr_type(addr) & 0xffff;
 282 }
 283
 284 static inline int ipv6_addr_scope(const struct in6_addr *addr)
 285 {
 286         return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
 287 }
 288
 289 static inline int __ipv6_addr_src_scope(int type)
 290 {
 291         return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
 292 }
 293
 294 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
 295 {
 296         return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
 297 }
 298
 299 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
 300 {
 301         return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
 302 }
 303
 304 static inline int
 305 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
 306                      const struct in6_addr *a2)
 307 {
 308         unsigned int i;
 309
 310         for (i = 0; i < 4; i++)
 311                 if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
 312                         return 1;
 313         return 0;
 314 }
 315
 316 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
 317 {
 318         memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
 319 }
 320
 321 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
 322                                     const struct in6_addr *addr,
 323                                     int plen)
 324 {
 325         /* caller must guarantee 0 <= plen <= 128 */
 326         int o = plen >> 3,
 327             b = plen & 0x7;
 328
 329         memcpy(pfx->s6_addr, addr, o);
 330         if (b != 0) {
 331                 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
 332                 o++;
 333         }
 334         if (o < 16)
 335                 memset(pfx->s6_addr + o, 0, 16 - o);
 336 }
 337
 338 #ifndef __HAVE_ARCH_ADDR_SET
 339 static inline void ipv6_addr_set(struct in6_addr *addr,
 340                                      __be32 w1, __be32 w2,
 341                                      __be32 w3, __be32 w4)
 342 {
 343         addr->s6_addr32[0] = w1;
 344         addr->s6_addr32[1] = w2;
 345         addr->s6_addr32[2] = w3;
 346         addr->s6_addr32[3] = w4;
 347 }
 348 #endif
 349
 350 static inline int ipv6_addr_equal(const struct in6_addr *a1,
 351                                   const struct in6_addr *a2)
 352 {
 353         return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
 354                 a1->s6_addr32[1] == a2->s6_addr32[1] &&
 355                 a1->s6_addr32[2] == a2->s6_addr32[2] &&
 356                 a1->s6_addr32[3] == a2->s6_addr32[3]);
 357 }
 358
 359 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
 360                                       unsigned int prefixlen)
 361 {
 362         unsigned pdw, pbi;
 363
 364         /* check complete u32 in prefix */
 365         pdw = prefixlen >> 5;
 366         if (pdw && memcmp(a1, a2, pdw << 2))
 367                 return 0;
 368
 369         /* check incomplete u32 in prefix */
 370         pbi = prefixlen & 0x1f;
 371         if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
 372                 return 0;
 373
 374         return 1;
 375 }
 376
 377 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
 378                                     const struct in6_addr *a2,
 379                                     unsigned int prefixlen)
 380 {
 381         return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
 382                                    prefixlen);
 383 }
 384
 385 static inline int ipv6_addr_any(const struct in6_addr *a)
 386 {
 387         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 388                  a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
 389 }
 390
 391 /*
 392  * find the first different bit between two addresses
 393  * length of address must be a multiple of 32bits
 394  */
 395 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
 396 {
 397         const __be32 *a1 = token1, *a2 = token2;
 398         int i;
 399
 400         addrlen >>= 2;
 401
 402         for (i = 0; i < addrlen; i++) {
 403                 __be32 xb = a1[i] ^ a2[i];
 404                 if (xb)
 405                         return i * 32 + 32 - fls(ntohl(xb));
 406         }
 407
 408         /*
 409          *      we should *never* get to this point since that
 410          *      would mean the addrs are equal
 411          *
 412          *      However, we do get to it 8) And exacly, when
 413          *      addresses are equal 8)
 414          *
 415          *      ip route add 1111::/128 via ...
 416          *      ip route add 1111::/64 via ...
 417          *      and we are here.
 418          *
 419          *      Ideally, this function should stop comparison
 420          *      at prefix length. It does not, but it is still OK,
 421          *      if returned value is greater than prefix length.
 422          *                                      --ANK (980803)
 423          */
 424         return (addrlen << 5);
 425 }
 426
 427 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
 428 {
 429         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
 430 }
 431
 432 /*
 433  *      Prototypes exported by ipv6
 434  */
 435
 436 /*
 437  *      rcv function (called from netdevice level)
 438  */
 439
 440 extern int                      ipv6_rcv(struct sk_buff *skb,
 441                                          struct net_device *dev,
 442                                          struct packet_type *pt,
 443                                          struct net_device *orig_dev);
 444
 445 extern int                      ip6_rcv_finish(struct sk_buff *skb);
 446
 447 /*
 448  *      upper-layer output functions
 449  */
 450 extern int                      ip6_xmit(struct sock *sk,
 451                                          struct sk_buff *skb,
 452                                          struct flowi *fl,
 453                                          struct ipv6_txoptions *opt,
 454                                          int ipfragok);
 455
 456 extern int                      ip6_nd_hdr(struct sock *sk,
 457                                            struct sk_buff *skb,
 458                                            struct net_device *dev,
 459                                            struct in6_addr *saddr,
 460                                            struct in6_addr *daddr,
 461                                            int proto, int len);
 462
 463 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 464
 465 extern int                      ip6_append_data(struct sock *sk,
 466                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
 467                                                 void *from,
 468                                                 int length,
 469                                                 int transhdrlen,
 470                                                 int hlimit,
 471                                                 int tclass,
 472                                                 struct ipv6_txoptions *opt,
 473                                                 struct flowi *fl,
 474                                                 struct rt6_info *rt,
 475                                                 unsigned int flags);
 476
 477 extern int                      ip6_push_pending_frames(struct sock *sk);
 478
 479 extern void                     ip6_flush_pending_frames(struct sock *sk);
 480
 481 extern int                      ip6_dst_lookup(struct sock *sk,
 482                                                struct dst_entry **dst,
 483                                                struct flowi *fl);
 484 extern int                      ip6_sk_dst_lookup(struct sock *sk,
 485                                                   struct dst_entry **dst,
 486                                                   struct flowi *fl);
 487
 488 /*
 489  *      skb processing functions
 490  */
 491
 492 extern int                      ip6_output(struct sk_buff *skb);
 493 extern int                      ip6_forward(struct sk_buff *skb);
 494 extern int                      ip6_input(struct sk_buff *skb);
 495 extern int                      ip6_mc_input(struct sk_buff *skb);
 496
 497 /*
 498  *      Extension header (options) processing
 499  */
 500
 501 extern u8 *                     ipv6_build_nfrag_opts(struct sk_buff *skb,
 502                                                       u8 *prev_hdr,
 503                                                       struct ipv6_txoptions *opt,
 504                                                       struct in6_addr *daddr,
 505                                                       u32 jumbolen);
 506 extern u8 *                     ipv6_build_frag_opts(struct sk_buff *skb,
 507                                                      u8 *prev_hdr,
 508                                                      struct ipv6_txoptions *opt);
 509 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
 510                                                      struct ipv6_txoptions *opt,
 511                                                      u8 *proto,
 512                                                      struct in6_addr **daddr_p);
 513 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
 514                                                     struct ipv6_txoptions *opt,
 515                                                     u8 *proto);
 516
 517 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
 518                                                  u8 *nexthdrp);
 519
 520 extern int                      ipv6_ext_hdr(u8 nexthdr);
 521
 522 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
 523
 524 extern struct ipv6_txoptions *  ipv6_invert_rthdr(struct sock *sk,
 525                                                   struct ipv6_rt_hdr *hdr);
 526
 527
 528 /*
 529  *      socket options (ipv6_sockglue.c)
 530  */
 531
 532 extern int                      ipv6_setsockopt(struct sock *sk, int level,
 533                                                 int optname,
 534                                                 char __user *optval,
 535                                                 int optlen);
 536 extern int                      ipv6_getsockopt(struct sock *sk, int level,
 537                                                 int optname,
 538                                                 char __user *optval,
 539                                                 int __user *optlen);
 540 extern int                      compat_ipv6_setsockopt(struct sock *sk,
 541                                                 int level,
 542                                                 int optname,
 543                                                 char __user *optval,
 544                                                 int optlen);
 545 extern int                      compat_ipv6_getsockopt(struct sock *sk,
 546                                                 int level,
 547                                                 int optname,
 548                                                 char __user *optval,
 549                                                 int __user *optlen);
 550
 551 extern void                     ipv6_packet_init(void);
 552
 553 extern void                     ipv6_packet_cleanup(void);
 554
 555 extern int                      ip6_datagram_connect(struct sock *sk,
 556                                                      struct sockaddr *addr, int addr_len);
 557
 558 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
 559 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
 560                                                 u32 info, u8 *payload);
 561 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 562
 563 extern int inet6_release(struct socket *sock);
 564 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
 565                       int addr_len);
 566 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 567                          int *uaddr_len, int peer);
 568 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
 569                        unsigned long arg);
 570
 571 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 572                               struct sock *sk);
 573
 574 /*
 575  * reassembly.c
 576  */
 577 extern int sysctl_ip6frag_high_thresh;
 578 extern int sysctl_ip6frag_low_thresh;
 579 extern int sysctl_ip6frag_time;
 580 extern int sysctl_ip6frag_secret_interval;
 581
 582 extern const struct proto_ops inet6_stream_ops;
 583 extern const struct proto_ops inet6_dgram_ops;
 584
 585 struct group_source_req;
 586 struct group_filter;
 587
 588 extern int ip6_mc_source(int add, int omode, struct sock *sk,
 589                          struct group_source_req *pgsr);
 590 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
 591 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 592                          struct group_filter __user *optval,
 593                          int __user *optlen);
 594
 595 #ifdef CONFIG_PROC_FS
 596 extern int  ac6_proc_init(void);
 597 extern void ac6_proc_exit(void);
 598 extern int  raw6_proc_init(void);
 599 extern void raw6_proc_exit(void);
 600 extern int  tcp6_proc_init(void);
 601 extern void tcp6_proc_exit(void);
 602 extern int  udp6_proc_init(void);
 603 extern void udp6_proc_exit(void);
 604 extern int  udplite6_proc_init(void);
 605 extern void udplite6_proc_exit(void);
 606 extern int  ipv6_misc_proc_init(void);
 607 extern void ipv6_misc_proc_exit(void);
 608
 609 extern struct rt6_statistics rt6_stats;
 610 #endif
 611
 612 #ifdef CONFIG_SYSCTL
 613 extern ctl_table ipv6_route_table[];
 614 extern ctl_table ipv6_icmp_table[];
 615
 616 extern void ipv6_sysctl_register(void);
 617 extern void ipv6_sysctl_unregister(void);
 618 #endif
 619
 620 #endif /* __KERNEL__ */
 621 #endif /* _NET_IPV6_H */