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