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 77 /* 78 * Addr scopes 79 */ 80 #ifdef __KERNEL__ 81 #define IPV6_ADDR_MC_SCOPE(a) \ 82 ((a)->s6_addr[1] & 0x0f) /* nonstandard */ 83 #define __IPV6_ADDR_SCOPE_INVALID -1 84 #endif 85 #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 86 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 87 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 88 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 89 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e 90 91 /* 92 * Addr flags 93 */ 94 #ifdef __KERNEL__ 95 #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ 96 ((a)->s6_addr[1] & 0x10) 97 #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ 98 ((a)->s6_addr[1] & 0x20) 99 #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ 100 ((a)->s6_addr[1] & 0x40) 101 #endif 102 103 /* 104 * fragmentation header 105 */ 106 107 struct frag_hdr { 108 __u8 nexthdr; 109 __u8 reserved; 110 __be16 frag_off; 111 __be32 identification; 112 }; 113 114 #define IP6_MF 0x0001 115 116 #ifdef __KERNEL__ 117 118 #include <net/sock.h> 119 120 /* sysctls */ 121 extern int sysctl_mld_max_msf; 122 extern struct ctl_path net_ipv6_ctl_path[]; 123 124 #define _DEVINC(net, statname, modifier, idev, field) \ 125 ({ \ 126 struct inet6_dev *_idev = (idev); \ 127 if (likely(_idev != NULL)) \ 128 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ 129 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ 130 }) 131 132 #define _DEVADD(net, statname, modifier, idev, field, val) \ 133 ({ \ 134 struct inet6_dev *_idev = (idev); \ 135 if (likely(_idev != NULL)) \ 136 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ 137 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ 138 }) 139 140 #define _DEVUPD(net, statname, modifier, idev, field, val) \ 141 ({ \ 142 struct inet6_dev *_idev = (idev); \ 143 if (likely(_idev != NULL)) \ 144 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ 145 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ 146 }) 147 148 /* MIBs */ 149 150 #define IP6_INC_STATS(net, idev,field) \ 151 _DEVINC(net, ipv6, 64, idev, field) 152 #define IP6_INC_STATS_BH(net, idev,field) \ 153 _DEVINC(net, ipv6, 64_BH, idev, field) 154 #define IP6_ADD_STATS(net, idev,field,val) \ 155 _DEVADD(net, ipv6, 64, idev, field, val) 156 #define IP6_ADD_STATS_BH(net, idev,field,val) \ 157 _DEVADD(net, ipv6, 64_BH, idev, field, val) 158 #define IP6_UPD_PO_STATS(net, idev,field,val) \ 159 _DEVUPD(net, ipv6, 64, idev, field, val) 160 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ 161 _DEVUPD(net, ipv6, 64_BH, idev, field, val) 162 #define ICMP6_INC_STATS(net, idev, field) \ 163 _DEVINC(net, icmpv6, , idev, field) 164 #define ICMP6_INC_STATS_BH(net, idev, field) \ 165 _DEVINC(net, icmpv6, _BH, idev, field) 166 167 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ 168 _DEVINC(net, icmpv6msg, , idev, field +256) 169 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ 170 _DEVINC(net, icmpv6msg, _BH, idev, field +256) 171 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ 172 _DEVINC(net, icmpv6msg, _BH, idev, field) 173 174 struct ip6_ra_chain { 175 struct ip6_ra_chain *next; 176 struct sock *sk; 177 int sel; 178 void (*destructor)(struct sock *); 179 }; 180 181 extern struct ip6_ra_chain *ip6_ra_chain; 182 extern rwlock_t ip6_ra_lock; 183 184 /* 185 This structure is prepared by protocol, when parsing 186 ancillary data and passed to IPv6. 187 */ 188 189 struct ipv6_txoptions { 190 /* Length of this structure */ 191 int tot_len; 192 193 /* length of extension headers */ 194 195 __u16 opt_flen; /* after fragment hdr */ 196 __u16 opt_nflen; /* before fragment hdr */ 197 198 struct ipv6_opt_hdr *hopopt; 199 struct ipv6_opt_hdr *dst0opt; 200 struct ipv6_rt_hdr *srcrt; /* Routing Header */ 201 struct ipv6_opt_hdr *dst1opt; 202 203 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ 204 }; 205 206 struct ip6_flowlabel { 207 struct ip6_flowlabel *next; 208 __be32 label; 209 atomic_t users; 210 struct in6_addr dst; 211 struct ipv6_txoptions *opt; 212 unsigned long linger; 213 u8 share; 214 u32 owner; 215 unsigned long lastuse; 216 unsigned long expires; 217 struct net *fl_net; 218 }; 219 220 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) 221 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) 222 223 struct ipv6_fl_socklist { 224 struct ipv6_fl_socklist *next; 225 struct ip6_flowlabel *fl; 226 }; 227 228 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); 229 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, 230 struct ip6_flowlabel * fl, 231 struct ipv6_txoptions * fopt); 232 extern void fl6_free_socklist(struct sock *sk); 233 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); 234 extern int ip6_flowlabel_init(void); 235 extern void ip6_flowlabel_cleanup(void); 236 237 static inline void fl6_sock_release(struct ip6_flowlabel *fl) 238 { 239 if (fl) 240 atomic_dec(&fl->users); 241 } 242 243 extern int ip6_ra_control(struct sock *sk, int sel); 244 245 extern int ipv6_parse_hopopts(struct sk_buff *skb); 246 247 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); 248 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, 249 int newtype, 250 struct ipv6_opt_hdr __user *newopt, 251 int newoptlen); 252 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, 253 struct ipv6_txoptions *opt); 254 255 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); 256 257 int ip6_frag_nqueues(struct net *net); 258 int ip6_frag_mem(struct net *net); 259 260 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ 261 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ 262 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ 263 264 extern int __ipv6_addr_type(const struct in6_addr *addr); 265 static inline int ipv6_addr_type(const struct in6_addr *addr) 266 { 267 return __ipv6_addr_type(addr) & 0xffff; 268 } 269 270 static inline int ipv6_addr_scope(const struct in6_addr *addr) 271 { 272 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; 273 } 274 275 static inline int __ipv6_addr_src_scope(int type) 276 { 277 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); 278 } 279 280 static inline int ipv6_addr_src_scope(const struct in6_addr *addr) 281 { 282 return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); 283 } 284 285 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) 286 { 287 return memcmp(a1, a2, sizeof(struct in6_addr)); 288 } 289 290 static inline int 291 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, 292 const struct in6_addr *a2) 293 { 294 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | 295 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | 296 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | 297 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); 298 } 299 300 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) 301 { 302 memcpy(a1, a2, sizeof(struct in6_addr)); 303 } 304 305 static inline void ipv6_addr_prefix(struct in6_addr *pfx, 306 const struct in6_addr *addr, 307 int plen) 308 { 309 /* caller must guarantee 0 <= plen <= 128 */ 310 int o = plen >> 3, 311 b = plen & 0x7; 312 313 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); 314 memcpy(pfx->s6_addr, addr, o); 315 if (b != 0) 316 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); 317 } 318 319 static inline void ipv6_addr_set(struct in6_addr *addr, 320 __be32 w1, __be32 w2, 321 __be32 w3, __be32 w4) 322 { 323 addr->s6_addr32[0] = w1; 324 addr->s6_addr32[1] = w2; 325 addr->s6_addr32[2] = w3; 326 addr->s6_addr32[3] = w4; 327 } 328 329 static inline int ipv6_addr_equal(const struct in6_addr *a1, 330 const struct in6_addr *a2) 331 { 332 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | 333 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | 334 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | 335 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; 336 } 337 338 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, 339 unsigned int prefixlen) 340 { 341 unsigned pdw, pbi; 342 343 /* check complete u32 in prefix */ 344 pdw = prefixlen >> 5; 345 if (pdw && memcmp(a1, a2, pdw << 2)) 346 return 0; 347 348 /* check incomplete u32 in prefix */ 349 pbi = prefixlen & 0x1f; 350 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) 351 return 0; 352 353 return 1; 354 } 355 356 static inline int ipv6_prefix_equal(const struct in6_addr *a1, 357 const struct in6_addr *a2, 358 unsigned int prefixlen) 359 { 360 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, 361 prefixlen); 362 } 363 364 struct inet_frag_queue; 365 366 enum ip6_defrag_users { 367 IP6_DEFRAG_LOCAL_DELIVER, 368 IP6_DEFRAG_CONNTRACK_IN, 369 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, 370 IP6_DEFRAG_CONNTRACK_OUT, 371 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, 372 IP6_DEFRAG_CONNTRACK_BRIDGE_IN, 373 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, 374 }; 375 376 struct ip6_create_arg { 377 __be32 id; 378 u32 user; 379 struct in6_addr *src; 380 struct in6_addr *dst; 381 }; 382 383 void ip6_frag_init(struct inet_frag_queue *q, void *a); 384 int ip6_frag_match(struct inet_frag_queue *q, void *a); 385 386 static inline int ipv6_addr_any(const struct in6_addr *a) 387 { 388 return (a->s6_addr32[0] | a->s6_addr32[1] | 389 a->s6_addr32[2] | a->s6_addr32[3]) == 0; 390 } 391 392 static inline int ipv6_addr_loopback(const struct in6_addr *a) 393 { 394 return (a->s6_addr32[0] | a->s6_addr32[1] | 395 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; 396 } 397 398 static inline int ipv6_addr_v4mapped(const struct in6_addr *a) 399 { 400 return (a->s6_addr32[0] | a->s6_addr32[1] | 401 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; 402 } 403 404 /* 405 * Check for a RFC 4843 ORCHID address 406 * (Overlay Routable Cryptographic Hash Identifiers) 407 */ 408 static inline int ipv6_addr_orchid(const struct in6_addr *a) 409 { 410 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); 411 } 412 413 static inline void ipv6_addr_set_v4mapped(const __be32 addr, 414 struct in6_addr *v4mapped) 415 { 416 ipv6_addr_set(v4mapped, 417 0, 0, 418 htonl(0x0000FFFF), 419 addr); 420 } 421 422 /* 423 * find the first different bit between two addresses 424 * length of address must be a multiple of 32bits 425 */ 426 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) 427 { 428 const __be32 *a1 = token1, *a2 = token2; 429 int i; 430 431 addrlen >>= 2; 432 433 for (i = 0; i < addrlen; i++) { 434 __be32 xb = a1[i] ^ a2[i]; 435 if (xb) 436 return i * 32 + 31 - __fls(ntohl(xb)); 437 } 438 439 /* 440 * we should *never* get to this point since that 441 * would mean the addrs are equal 442 * 443 * However, we do get to it 8) And exacly, when 444 * addresses are equal 8) 445 * 446 * ip route add 1111::/128 via ... 447 * ip route add 1111::/64 via ... 448 * and we are here. 449 * 450 * Ideally, this function should stop comparison 451 * at prefix length. It does not, but it is still OK, 452 * if returned value is greater than prefix length. 453 * --ANK (980803) 454 */ 455 return addrlen << 5; 456 } 457 458 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) 459 { 460 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); 461 } 462 463 static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr) 464 { 465 static u32 ipv6_fragmentation_id = 1; 466 static DEFINE_SPINLOCK(ip6_id_lock); 467 468 spin_lock_bh(&ip6_id_lock); 469 fhdr->identification = htonl(ipv6_fragmentation_id); 470 if (++ipv6_fragmentation_id == 0) 471 ipv6_fragmentation_id = 1; 472 spin_unlock_bh(&ip6_id_lock); 473 } 474 475 /* 476 * Prototypes exported by ipv6 477 */ 478 479 /* 480 * rcv function (called from netdevice level) 481 */ 482 483 extern int ipv6_rcv(struct sk_buff *skb, 484 struct net_device *dev, 485 struct packet_type *pt, 486 struct net_device *orig_dev); 487 488 extern int ip6_rcv_finish(struct sk_buff *skb); 489 490 /* 491 * upper-layer output functions 492 */ 493 extern int ip6_xmit(struct sock *sk, 494 struct sk_buff *skb, 495 struct flowi6 *fl6, 496 struct ipv6_txoptions *opt); 497 498 extern int ip6_nd_hdr(struct sock *sk, 499 struct sk_buff *skb, 500 struct net_device *dev, 501 const struct in6_addr *saddr, 502 const struct in6_addr *daddr, 503 int proto, int len); 504 505 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); 506 507 extern int ip6_append_data(struct sock *sk, 508 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), 509 void *from, 510 int length, 511 int transhdrlen, 512 int hlimit, 513 int tclass, 514 struct ipv6_txoptions *opt, 515 struct flowi6 *fl6, 516 struct rt6_info *rt, 517 unsigned int flags, 518 int dontfrag); 519 520 extern int ip6_push_pending_frames(struct sock *sk); 521 522 extern void ip6_flush_pending_frames(struct sock *sk); 523 524 extern int ip6_dst_lookup(struct sock *sk, 525 struct dst_entry **dst, 526 struct flowi6 *fl6); 527 extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, 528 struct flowi6 *fl6, 529 const struct in6_addr *final_dst, 530 bool can_sleep); 531 extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, 532 struct flowi6 *fl6, 533 const struct in6_addr *final_dst, 534 bool can_sleep); 535 extern struct dst_entry * ip6_blackhole_route(struct net *net, 536 struct dst_entry *orig_dst); 537 538 /* 539 * skb processing functions 540 */ 541 542 extern int ip6_output(struct sk_buff *skb); 543 extern int ip6_forward(struct sk_buff *skb); 544 extern int ip6_input(struct sk_buff *skb); 545 extern int ip6_mc_input(struct sk_buff *skb); 546 547 extern int __ip6_local_out(struct sk_buff *skb); 548 extern int ip6_local_out(struct sk_buff *skb); 549 550 /* 551 * Extension header (options) processing 552 */ 553 554 extern void ipv6_push_nfrag_opts(struct sk_buff *skb, 555 struct ipv6_txoptions *opt, 556 u8 *proto, 557 struct in6_addr **daddr_p); 558 extern void ipv6_push_frag_opts(struct sk_buff *skb, 559 struct ipv6_txoptions *opt, 560 u8 *proto); 561 562 extern int ipv6_skip_exthdr(const struct sk_buff *, int start, 563 u8 *nexthdrp); 564 565 extern int ipv6_ext_hdr(u8 nexthdr); 566 567 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); 568 569 extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6, 570 const struct ipv6_txoptions *opt, 571 struct in6_addr *orig); 572 573 /* 574 * socket options (ipv6_sockglue.c) 575 */ 576 577 extern int ipv6_setsockopt(struct sock *sk, int level, 578 int optname, 579 char __user *optval, 580 unsigned int optlen); 581 extern int ipv6_getsockopt(struct sock *sk, int level, 582 int optname, 583 char __user *optval, 584 int __user *optlen); 585 extern int compat_ipv6_setsockopt(struct sock *sk, 586 int level, 587 int optname, 588 char __user *optval, 589 unsigned int optlen); 590 extern int compat_ipv6_getsockopt(struct sock *sk, 591 int level, 592 int optname, 593 char __user *optval, 594 int __user *optlen); 595 596 extern int ip6_datagram_connect(struct sock *sk, 597 struct sockaddr *addr, int addr_len); 598 599 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); 600 extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); 601 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, 602 u32 info, u8 *payload); 603 extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); 604 extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); 605 606 extern int inet6_release(struct socket *sock); 607 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 608 int addr_len); 609 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 610 int *uaddr_len, int peer); 611 extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 612 unsigned long arg); 613 614 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, 615 struct sock *sk); 616 617 /* 618 * reassembly.c 619 */ 620 extern const struct proto_ops inet6_stream_ops; 621 extern const struct proto_ops inet6_dgram_ops; 622 623 struct group_source_req; 624 struct group_filter; 625 626 extern int ip6_mc_source(int add, int omode, struct sock *sk, 627 struct group_source_req *pgsr); 628 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); 629 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, 630 struct group_filter __user *optval, 631 int __user *optlen); 632 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, 633 const struct in6_addr *daddr, u32 rnd); 634 635 #ifdef CONFIG_PROC_FS 636 extern int ac6_proc_init(struct net *net); 637 extern void ac6_proc_exit(struct net *net); 638 extern int raw6_proc_init(void); 639 extern void raw6_proc_exit(void); 640 extern int tcp6_proc_init(struct net *net); 641 extern void tcp6_proc_exit(struct net *net); 642 extern int udp6_proc_init(struct net *net); 643 extern void udp6_proc_exit(struct net *net); 644 extern int udplite6_proc_init(void); 645 extern void udplite6_proc_exit(void); 646 extern int ipv6_misc_proc_init(void); 647 extern void ipv6_misc_proc_exit(void); 648 extern int snmp6_register_dev(struct inet6_dev *idev); 649 extern int snmp6_unregister_dev(struct inet6_dev *idev); 650 651 #else 652 static inline int ac6_proc_init(struct net *net) { return 0; } 653 static inline void ac6_proc_exit(struct net *net) { } 654 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } 655 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } 656 #endif 657 658 #ifdef CONFIG_SYSCTL 659 extern ctl_table ipv6_route_table_template[]; 660 extern ctl_table ipv6_icmp_table_template[]; 661 662 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); 663 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); 664 extern int ipv6_sysctl_register(void); 665 extern void ipv6_sysctl_unregister(void); 666 extern int ipv6_static_sysctl_register(void); 667 extern void ipv6_static_sysctl_unregister(void); 668 #endif 669 670 #endif /* __KERNEL__ */ 671 #endif /* _NET_IPV6_H */ 672