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(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         struct ip6_ra_chain     *next;
 165         struct sock             *sk;
 166         int                     sel;
 167         void                    (*destructor)(struct sock *);
 168 };
 169
 170 extern struct ip6_ra_chain      *ip6_ra_chain;
 171 extern rwlock_t ip6_ra_lock;
 172
 173 /*
 174    This structure is prepared by protocol, when parsing
 175    ancillary data and passed to IPv6.
 176  */
 177
 178 struct ipv6_txoptions {
 179         /* Length of this structure */
 180         int                     tot_len;
 181
 182         /* length of extension headers   */
 183
 184         __u16                   opt_flen;       /* after fragment hdr */
 185         __u16                   opt_nflen;      /* before fragment hdr */
 186
 187         struct ipv6_opt_hdr     *hopopt;
 188         struct ipv6_opt_hdr     *dst0opt;
 189         struct ipv6_rt_hdr      *srcrt; /* Routing Header */
 190         struct ipv6_opt_hdr     *dst1opt;
 191
 192         /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
 193 };
 194
 195 struct ip6_flowlabel {
 196         struct ip6_flowlabel    *next;
 197         __be32                  label;
 198         atomic_t                users;
 199         struct in6_addr         dst;
 200         struct ipv6_txoptions   *opt;
 201         unsigned long           linger;
 202         u8                      share;
 203         u32                     owner;
 204         unsigned long           lastuse;
 205         unsigned long           expires;
 206         struct net              *fl_net;
 207 };
 208
 209 #define IPV6_FLOWINFO_MASK      cpu_to_be32(0x0FFFFFFF)
 210 #define IPV6_FLOWLABEL_MASK     cpu_to_be32(0x000FFFFF)
 211
 212 struct ipv6_fl_socklist {
 213         struct ipv6_fl_socklist *next;
 214         struct ip6_flowlabel    *fl;
 215 };
 216
 217 extern struct ip6_flowlabel     *fl6_sock_lookup(struct sock *sk, __be32 label);
 218 extern struct ipv6_txoptions    *fl6_merge_options(struct ipv6_txoptions * opt_space,
 219                                                    struct ip6_flowlabel * fl,
 220                                                    struct ipv6_txoptions * fopt);
 221 extern void                     fl6_free_socklist(struct sock *sk);
 222 extern int                      ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
 223 extern int                      ip6_flowlabel_init(void);
 224 extern void                     ip6_flowlabel_cleanup(void);
 225
 226 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 227 {
 228         if (fl)
 229                 atomic_dec(&fl->users);
 230 }
 231
 232 extern int                      ip6_ra_control(struct sock *sk, int sel);
 233
 234 extern int                      ipv6_parse_hopopts(struct sk_buff *skb);
 235
 236 extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
 237 extern struct ipv6_txoptions *  ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
 238                                                    int newtype,
 239                                                    struct ipv6_opt_hdr __user *newopt,
 240                                                    int newoptlen);
 241 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 242                                           struct ipv6_txoptions *opt);
 243
 244 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
 245
 246 int ip6_frag_nqueues(struct net *net);
 247 int ip6_frag_mem(struct net *net);
 248
 249 #define IPV6_FRAG_TIMEOUT       (60*HZ)         /* 60 seconds */
 250
 251 extern int __ipv6_addr_type(const struct in6_addr *addr);
 252 static inline int ipv6_addr_type(const struct in6_addr *addr)
 253 {
 254         return __ipv6_addr_type(addr) & 0xffff;
 255 }
 256
 257 static inline int ipv6_addr_scope(const struct in6_addr *addr)
 258 {
 259         return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
 260 }
 261
 262 static inline int __ipv6_addr_src_scope(int type)
 263 {
 264         return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
 265 }
 266
 267 static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
 268 {
 269         return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
 270 }
 271
 272 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
 273 {
 274         return memcmp(a1, a2, sizeof(struct in6_addr));
 275 }
 276
 277 static inline int
 278 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
 279                      const struct in6_addr *a2)
 280 {
 281         return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
 282                    ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
 283                    ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
 284                    ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
 285 }
 286
 287 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
 288 {
 289         memcpy(a1, a2, sizeof(struct in6_addr));
 290 }
 291
 292 static inline void ipv6_addr_prefix(struct in6_addr *pfx,
 293                                     const struct in6_addr *addr,
 294                                     int plen)
 295 {
 296         /* caller must guarantee 0 <= plen <= 128 */
 297         int o = plen >> 3,
 298             b = plen & 0x7;
 299
 300         memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
 301         memcpy(pfx->s6_addr, addr, o);
 302         if (b != 0)
 303                 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
 304 }
 305
 306 static inline void ipv6_addr_set(struct in6_addr *addr,
 307                                      __be32 w1, __be32 w2,
 308                                      __be32 w3, __be32 w4)
 309 {
 310         addr->s6_addr32[0] = w1;
 311         addr->s6_addr32[1] = w2;
 312         addr->s6_addr32[2] = w3;
 313         addr->s6_addr32[3] = w4;
 314 }
 315
 316 static inline int ipv6_addr_equal(const struct in6_addr *a1,
 317                                   const struct in6_addr *a2)
 318 {
 319         return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
 320                  (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
 321                  (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
 322                  (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
 323 }
 324
 325 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
 326                                       unsigned int prefixlen)
 327 {
 328         unsigned pdw, pbi;
 329
 330         /* check complete u32 in prefix */
 331         pdw = prefixlen >> 5;
 332         if (pdw && memcmp(a1, a2, pdw << 2))
 333                 return 0;
 334
 335         /* check incomplete u32 in prefix */
 336         pbi = prefixlen & 0x1f;
 337         if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
 338                 return 0;
 339
 340         return 1;
 341 }
 342
 343 static inline int ipv6_prefix_equal(const struct in6_addr *a1,
 344                                     const struct in6_addr *a2,
 345                                     unsigned int prefixlen)
 346 {
 347         return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
 348                                    prefixlen);
 349 }
 350
 351 struct inet_frag_queue;
 352
 353 struct ip6_create_arg {
 354         __be32 id;
 355         struct in6_addr *src;
 356         struct in6_addr *dst;
 357 };
 358
 359 void ip6_frag_init(struct inet_frag_queue *q, void *a);
 360 int ip6_frag_match(struct inet_frag_queue *q, void *a);
 361
 362 static inline int ipv6_addr_any(const struct in6_addr *a)
 363 {
 364         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 365                  a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
 366 }
 367
 368 static inline int ipv6_addr_loopback(const struct in6_addr *a)
 369 {
 370         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 371                  a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
 372 }
 373
 374 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
 375 {
 376         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 377                  (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
 378 }
 379
 380 /*
 381  * Check for a RFC 4843 ORCHID address
 382  * (Overlay Routable Cryptographic Hash Identifiers)
 383  */
 384 static inline int ipv6_addr_orchid(const struct in6_addr *a)
 385 {
 386         return ((a->s6_addr32[0] & htonl(0xfffffff0))
 387                 == htonl(0x20010010));
 388 }
 389
 390 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
 391                                           struct in6_addr *v4mapped)
 392 {
 393         ipv6_addr_set(v4mapped,
 394                         0, 0,
 395                         htonl(0x0000FFFF),
 396                         addr);
 397 }
 398
 399 /*
 400  * find the first different bit between two addresses
 401  * length of address must be a multiple of 32bits
 402  */
 403 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
 404 {
 405         const __be32 *a1 = token1, *a2 = token2;
 406         int i;
 407
 408         addrlen >>= 2;
 409
 410         for (i = 0; i < addrlen; i++) {
 411                 __be32 xb = a1[i] ^ a2[i];
 412                 if (xb)
 413                         return i * 32 + 32 - fls(ntohl(xb));
 414         }
 415
 416         /*
 417          *      we should *never* get to this point since that
 418          *      would mean the addrs are equal
 419          *
 420          *      However, we do get to it 8) And exacly, when
 421          *      addresses are equal 8)
 422          *
 423          *      ip route add 1111::/128 via ...
 424          *      ip route add 1111::/64 via ...
 425          *      and we are here.
 426          *
 427          *      Ideally, this function should stop comparison
 428          *      at prefix length. It does not, but it is still OK,
 429          *      if returned value is greater than prefix length.
 430          *                                      --ANK (980803)
 431          */
 432         return (addrlen << 5);
 433 }
 434
 435 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
 436 {
 437         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
 438 }
 439
 440 static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
 441 {
 442         static u32 ipv6_fragmentation_id = 1;
 443         static DEFINE_SPINLOCK(ip6_id_lock);
 444
 445         spin_lock_bh(&ip6_id_lock);
 446         fhdr->identification = htonl(ipv6_fragmentation_id);
 447         if (++ipv6_fragmentation_id == 0)
 448                 ipv6_fragmentation_id = 1;
 449         spin_unlock_bh(&ip6_id_lock);
 450 }
 451
 452 /*
 453  *      Prototypes exported by ipv6
 454  */
 455
 456 /*
 457  *      rcv function (called from netdevice level)
 458  */
 459
 460 extern int                      ipv6_rcv(struct sk_buff *skb,
 461                                          struct net_device *dev,
 462                                          struct packet_type *pt,
 463                                          struct net_device *orig_dev);
 464
 465 extern int                      ip6_rcv_finish(struct sk_buff *skb);
 466
 467 /*
 468  *      upper-layer output functions
 469  */
 470 extern int                      ip6_xmit(struct sock *sk,
 471                                          struct sk_buff *skb,
 472                                          struct flowi *fl,
 473                                          struct ipv6_txoptions *opt,
 474                                          int ipfragok);
 475
 476 extern int                      ip6_nd_hdr(struct sock *sk,
 477                                            struct sk_buff *skb,
 478                                            struct net_device *dev,
 479                                            const struct in6_addr *saddr,
 480                                            const struct in6_addr *daddr,
 481                                            int proto, int len);
 482
 483 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 484
 485 extern int                      ip6_append_data(struct sock *sk,
 486                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
 487                                                 void *from,
 488                                                 int length,
 489                                                 int transhdrlen,
 490                                                 int hlimit,
 491                                                 int tclass,
 492                                                 struct ipv6_txoptions *opt,
 493                                                 struct flowi *fl,
 494                                                 struct rt6_info *rt,
 495                                                 unsigned int flags);
 496
 497 extern int                      ip6_push_pending_frames(struct sock *sk);
 498
 499 extern void                     ip6_flush_pending_frames(struct sock *sk);
 500
 501 extern int                      ip6_dst_lookup(struct sock *sk,
 502                                                struct dst_entry **dst,
 503                                                struct flowi *fl);
 504 extern int                      ip6_dst_blackhole(struct sock *sk,
 505                                                   struct dst_entry **dst,
 506                                                   struct flowi *fl);
 507 extern int                      ip6_sk_dst_lookup(struct sock *sk,
 508                                                   struct dst_entry **dst,
 509                                                   struct flowi *fl);
 510
 511 /*
 512  *      skb processing functions
 513  */
 514
 515 extern int                      ip6_output(struct sk_buff *skb);
 516 extern int                      ip6_forward(struct sk_buff *skb);
 517 extern int                      ip6_input(struct sk_buff *skb);
 518 extern int                      ip6_mc_input(struct sk_buff *skb);
 519
 520 extern int                      __ip6_local_out(struct sk_buff *skb);
 521 extern int                      ip6_local_out(struct sk_buff *skb);
 522
 523 /*
 524  *      Extension header (options) processing
 525  */
 526
 527 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
 528                                                      struct ipv6_txoptions *opt,
 529                                                      u8 *proto,
 530                                                      struct in6_addr **daddr_p);
 531 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
 532                                                     struct ipv6_txoptions *opt,
 533                                                     u8 *proto);
 534
 535 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
 536                                                  u8 *nexthdrp);
 537
 538 extern int                      ipv6_ext_hdr(u8 nexthdr);
 539
 540 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
 541
 542 /*
 543  *      socket options (ipv6_sockglue.c)
 544  */
 545
 546 extern int                      ipv6_setsockopt(struct sock *sk, int level,
 547                                                 int optname,
 548                                                 char __user *optval,
 549                                                 unsigned int optlen);
 550 extern int                      ipv6_getsockopt(struct sock *sk, int level,
 551                                                 int optname,
 552                                                 char __user *optval,
 553                                                 int __user *optlen);
 554 extern int                      compat_ipv6_setsockopt(struct sock *sk,
 555                                                 int level,
 556                                                 int optname,
 557                                                 char __user *optval,
 558                                                 unsigned int optlen);
 559 extern int                      compat_ipv6_getsockopt(struct sock *sk,
 560                                                 int level,
 561                                                 int optname,
 562                                                 char __user *optval,
 563                                                 int __user *optlen);
 564
 565 extern int                      ip6_datagram_connect(struct sock *sk,
 566                                                      struct sockaddr *addr, int addr_len);
 567
 568 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
 569 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
 570                                                 u32 info, u8 *payload);
 571 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 572
 573 extern int inet6_release(struct socket *sock);
 574 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
 575                       int addr_len);
 576 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 577                          int *uaddr_len, int peer);
 578 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
 579                        unsigned long arg);
 580
 581 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 582                               struct sock *sk);
 583
 584 /*
 585  * reassembly.c
 586  */
 587 extern const struct proto_ops inet6_stream_ops;
 588 extern const struct proto_ops inet6_dgram_ops;
 589
 590 struct group_source_req;
 591 struct group_filter;
 592
 593 extern int ip6_mc_source(int add, int omode, struct sock *sk,
 594                          struct group_source_req *pgsr);
 595 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
 596 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 597                          struct group_filter __user *optval,
 598                          int __user *optlen);
 599 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
 600                                     const struct in6_addr *daddr, u32 rnd);
 601
 602 #ifdef CONFIG_PROC_FS
 603 extern int  ac6_proc_init(struct net *net);
 604 extern void ac6_proc_exit(struct net *net);
 605 extern int  raw6_proc_init(void);
 606 extern void raw6_proc_exit(void);
 607 extern int  tcp6_proc_init(struct net *net);
 608 extern void tcp6_proc_exit(struct net *net);
 609 extern int  udp6_proc_init(struct net *net);
 610 extern void udp6_proc_exit(struct net *net);
 611 extern int  udplite6_proc_init(void);
 612 extern void udplite6_proc_exit(void);
 613 extern int  ipv6_misc_proc_init(void);
 614 extern void ipv6_misc_proc_exit(void);
 615 extern int snmp6_register_dev(struct inet6_dev *idev);
 616 extern int snmp6_unregister_dev(struct inet6_dev *idev);
 617
 618 #else
 619 static inline int ac6_proc_init(struct net *net) { return 0; }
 620 static inline void ac6_proc_exit(struct net *net) { }
 621 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
 622 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
 623 #endif
 624
 625 #ifdef CONFIG_SYSCTL
 626 extern ctl_table ipv6_route_table_template[];
 627 extern ctl_table ipv6_icmp_table_template[];
 628
 629 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 630 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 631 extern int ipv6_sysctl_register(void);
 632 extern void ipv6_sysctl_unregister(void);
 633 extern int ipv6_static_sysctl_register(void);
 634 extern void ipv6_static_sysctl_unregister(void);
 635 #endif
 636
 637 #endif /* __KERNEL__ */
 638 #endif /* _NET_IPV6_H */