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