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 enum ip6_defrag_users {
 354         IP6_DEFRAG_LOCAL_DELIVER,
 355         IP6_DEFRAG_CONNTRACK_IN,
 356         IP6_DEFRAG_CONNTRACK_OUT,
 357         IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
 358 };
 359
 360 struct ip6_create_arg {
 361         __be32 id;
 362         u32 user;
 363         struct in6_addr *src;
 364         struct in6_addr *dst;
 365 };
 366
 367 void ip6_frag_init(struct inet_frag_queue *q, void *a);
 368 int ip6_frag_match(struct inet_frag_queue *q, void *a);
 369
 370 static inline int ipv6_addr_any(const struct in6_addr *a)
 371 {
 372         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 373                  a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
 374 }
 375
 376 static inline int ipv6_addr_loopback(const struct in6_addr *a)
 377 {
 378         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 379                  a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
 380 }
 381
 382 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
 383 {
 384         return ((a->s6_addr32[0] | a->s6_addr32[1] |
 385                  (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
 386 }
 387
 388 /*
 389  * Check for a RFC 4843 ORCHID address
 390  * (Overlay Routable Cryptographic Hash Identifiers)
 391  */
 392 static inline int ipv6_addr_orchid(const struct in6_addr *a)
 393 {
 394         return ((a->s6_addr32[0] & htonl(0xfffffff0))
 395                 == htonl(0x20010010));
 396 }
 397
 398 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
 399                                           struct in6_addr *v4mapped)
 400 {
 401         ipv6_addr_set(v4mapped,
 402                         0, 0,
 403                         htonl(0x0000FFFF),
 404                         addr);
 405 }
 406
 407 /*
 408  * find the first different bit between two addresses
 409  * length of address must be a multiple of 32bits
 410  */
 411 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
 412 {
 413         const __be32 *a1 = token1, *a2 = token2;
 414         int i;
 415
 416         addrlen >>= 2;
 417
 418         for (i = 0; i < addrlen; i++) {
 419                 __be32 xb = a1[i] ^ a2[i];
 420                 if (xb)
 421                         return i * 32 + 32 - fls(ntohl(xb));
 422         }
 423
 424         /*
 425          *      we should *never* get to this point since that
 426          *      would mean the addrs are equal
 427          *
 428          *      However, we do get to it 8) And exacly, when
 429          *      addresses are equal 8)
 430          *
 431          *      ip route add 1111::/128 via ...
 432          *      ip route add 1111::/64 via ...
 433          *      and we are here.
 434          *
 435          *      Ideally, this function should stop comparison
 436          *      at prefix length. It does not, but it is still OK,
 437          *      if returned value is greater than prefix length.
 438          *                                      --ANK (980803)
 439          */
 440         return (addrlen << 5);
 441 }
 442
 443 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
 444 {
 445         return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
 446 }
 447
 448 static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
 449 {
 450         static u32 ipv6_fragmentation_id = 1;
 451         static DEFINE_SPINLOCK(ip6_id_lock);
 452
 453         spin_lock_bh(&ip6_id_lock);
 454         fhdr->identification = htonl(ipv6_fragmentation_id);
 455         if (++ipv6_fragmentation_id == 0)
 456                 ipv6_fragmentation_id = 1;
 457         spin_unlock_bh(&ip6_id_lock);
 458 }
 459
 460 /*
 461  *      Prototypes exported by ipv6
 462  */
 463
 464 /*
 465  *      rcv function (called from netdevice level)
 466  */
 467
 468 extern int                      ipv6_rcv(struct sk_buff *skb,
 469                                          struct net_device *dev,
 470                                          struct packet_type *pt,
 471                                          struct net_device *orig_dev);
 472
 473 extern int                      ip6_rcv_finish(struct sk_buff *skb);
 474
 475 /*
 476  *      upper-layer output functions
 477  */
 478 extern int                      ip6_xmit(struct sock *sk,
 479                                          struct sk_buff *skb,
 480                                          struct flowi *fl,
 481                                          struct ipv6_txoptions *opt,
 482                                          int ipfragok);
 483
 484 extern int                      ip6_nd_hdr(struct sock *sk,
 485                                            struct sk_buff *skb,
 486                                            struct net_device *dev,
 487                                            const struct in6_addr *saddr,
 488                                            const struct in6_addr *daddr,
 489                                            int proto, int len);
 490
 491 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 492
 493 extern int                      ip6_append_data(struct sock *sk,
 494                                                 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
 495                                                 void *from,
 496                                                 int length,
 497                                                 int transhdrlen,
 498                                                 int hlimit,
 499                                                 int tclass,
 500                                                 struct ipv6_txoptions *opt,
 501                                                 struct flowi *fl,
 502                                                 struct rt6_info *rt,
 503                                                 unsigned int flags);
 504
 505 extern int                      ip6_push_pending_frames(struct sock *sk);
 506
 507 extern void                     ip6_flush_pending_frames(struct sock *sk);
 508
 509 extern int                      ip6_dst_lookup(struct sock *sk,
 510                                                struct dst_entry **dst,
 511                                                struct flowi *fl);
 512 extern int                      ip6_dst_blackhole(struct sock *sk,
 513                                                   struct dst_entry **dst,
 514                                                   struct flowi *fl);
 515 extern int                      ip6_sk_dst_lookup(struct sock *sk,
 516                                                   struct dst_entry **dst,
 517                                                   struct flowi *fl);
 518
 519 /*
 520  *      skb processing functions
 521  */
 522
 523 extern int                      ip6_output(struct sk_buff *skb);
 524 extern int                      ip6_forward(struct sk_buff *skb);
 525 extern int                      ip6_input(struct sk_buff *skb);
 526 extern int                      ip6_mc_input(struct sk_buff *skb);
 527
 528 extern int                      __ip6_local_out(struct sk_buff *skb);
 529 extern int                      ip6_local_out(struct sk_buff *skb);
 530
 531 /*
 532  *      Extension header (options) processing
 533  */
 534
 535 extern void                     ipv6_push_nfrag_opts(struct sk_buff *skb,
 536                                                      struct ipv6_txoptions *opt,
 537                                                      u8 *proto,
 538                                                      struct in6_addr **daddr_p);
 539 extern void                     ipv6_push_frag_opts(struct sk_buff *skb,
 540                                                     struct ipv6_txoptions *opt,
 541                                                     u8 *proto);
 542
 543 extern int                      ipv6_skip_exthdr(const struct sk_buff *, int start,
 544                                                  u8 *nexthdrp);
 545
 546 extern int                      ipv6_ext_hdr(u8 nexthdr);
 547
 548 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
 549
 550 /*
 551  *      socket options (ipv6_sockglue.c)
 552  */
 553
 554 extern int                      ipv6_setsockopt(struct sock *sk, int level,
 555                                                 int optname,
 556                                                 char __user *optval,
 557                                                 unsigned int optlen);
 558 extern int                      ipv6_getsockopt(struct sock *sk, int level,
 559                                                 int optname,
 560                                                 char __user *optval,
 561                                                 int __user *optlen);
 562 extern int                      compat_ipv6_setsockopt(struct sock *sk,
 563                                                 int level,
 564                                                 int optname,
 565                                                 char __user *optval,
 566                                                 unsigned int optlen);
 567 extern int                      compat_ipv6_getsockopt(struct sock *sk,
 568                                                 int level,
 569                                                 int optname,
 570                                                 char __user *optval,
 571                                                 int __user *optlen);
 572
 573 extern int                      ip6_datagram_connect(struct sock *sk,
 574                                                      struct sockaddr *addr, int addr_len);
 575
 576 extern int                      ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
 577 extern void                     ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
 578                                                 u32 info, u8 *payload);
 579 extern void                     ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 580
 581 extern int inet6_release(struct socket *sock);
 582 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
 583                       int addr_len);
 584 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 585                          int *uaddr_len, int peer);
 586 extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
 587                        unsigned long arg);
 588
 589 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 590                               struct sock *sk);
 591
 592 /*
 593  * reassembly.c
 594  */
 595 extern const struct proto_ops inet6_stream_ops;
 596 extern const struct proto_ops inet6_dgram_ops;
 597
 598 struct group_source_req;
 599 struct group_filter;
 600
 601 extern int ip6_mc_source(int add, int omode, struct sock *sk,
 602                          struct group_source_req *pgsr);
 603 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
 604 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 605                          struct group_filter __user *optval,
 606                          int __user *optlen);
 607 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
 608                                     const struct in6_addr *daddr, u32 rnd);
 609
 610 #ifdef CONFIG_PROC_FS
 611 extern int  ac6_proc_init(struct net *net);
 612 extern void ac6_proc_exit(struct net *net);
 613 extern int  raw6_proc_init(void);
 614 extern void raw6_proc_exit(void);
 615 extern int  tcp6_proc_init(struct net *net);
 616 extern void tcp6_proc_exit(struct net *net);
 617 extern int  udp6_proc_init(struct net *net);
 618 extern void udp6_proc_exit(struct net *net);
 619 extern int  udplite6_proc_init(void);
 620 extern void udplite6_proc_exit(void);
 621 extern int  ipv6_misc_proc_init(void);
 622 extern void ipv6_misc_proc_exit(void);
 623 extern int snmp6_register_dev(struct inet6_dev *idev);
 624 extern int snmp6_unregister_dev(struct inet6_dev *idev);
 625
 626 #else
 627 static inline int ac6_proc_init(struct net *net) { return 0; }
 628 static inline void ac6_proc_exit(struct net *net) { }
 629 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
 630 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
 631 #endif
 632
 633 #ifdef CONFIG_SYSCTL
 634 extern ctl_table ipv6_route_table_template[];
 635 extern ctl_table ipv6_icmp_table_template[];
 636
 637 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 638 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 639 extern int ipv6_sysctl_register(void);
 640 extern void ipv6_sysctl_unregister(void);
 641 extern int ipv6_static_sysctl_register(void);
 642 extern void ipv6_static_sysctl_unregister(void);
 643 #endif
 644
 645 #endif /* __KERNEL__ */
 646 #endif /* _NET_IPV6_H */