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; 116 117 #define _DEVINC(net, statname, modifier, idev, field) \ 118 ({ \ 119 struct inet6_dev *_idev = (idev); \ 120 if (likely(_idev != NULL)) \ 121 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ 122 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ 123 }) 124 125 /* per device counters are atomic_long_t */ 126 #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ 127 ({ \ 128 struct inet6_dev *_idev = (idev); \ 129 if (likely(_idev != NULL)) \ 130 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ 131 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ 132 }) 133 134 /* per device and per net counters are atomic_long_t */ 135 #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ 136 ({ \ 137 struct inet6_dev *_idev = (idev); \ 138 if (likely(_idev != NULL)) \ 139 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ 140 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ 141 }) 142 143 #define _DEVADD(net, statname, modifier, idev, field, val) \ 144 ({ \ 145 struct inet6_dev *_idev = (idev); \ 146 if (likely(_idev != NULL)) \ 147 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ 148 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ 149 }) 150 151 #define _DEVUPD(net, statname, modifier, idev, field, val) \ 152 ({ \ 153 struct inet6_dev *_idev = (idev); \ 154 if (likely(_idev != NULL)) \ 155 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ 156 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ 157 }) 158 159 /* MIBs */ 160 161 #define IP6_INC_STATS(net, idev,field) \ 162 _DEVINC(net, ipv6, 64, idev, field) 163 #define IP6_INC_STATS_BH(net, idev,field) \ 164 _DEVINC(net, ipv6, 64_BH, idev, field) 165 #define IP6_ADD_STATS(net, idev,field,val) \ 166 _DEVADD(net, ipv6, 64, idev, field, val) 167 #define IP6_ADD_STATS_BH(net, idev,field,val) \ 168 _DEVADD(net, ipv6, 64_BH, idev, field, val) 169 #define IP6_UPD_PO_STATS(net, idev,field,val) \ 170 _DEVUPD(net, ipv6, 64, idev, field, val) 171 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ 172 _DEVUPD(net, ipv6, 64_BH, idev, field, val) 173 #define ICMP6_INC_STATS(net, idev, field) \ 174 _DEVINCATOMIC(net, icmpv6, , idev, field) 175 #define ICMP6_INC_STATS_BH(net, idev, field) \ 176 _DEVINCATOMIC(net, icmpv6, _BH, idev, field) 177 178 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ 179 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) 180 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ 181 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) 182 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ 183 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) 184 185 struct ip6_ra_chain { 186 struct ip6_ra_chain *next; 187 struct sock *sk; 188 int sel; 189 void (*destructor)(struct sock *); 190 }; 191 192 extern struct ip6_ra_chain *ip6_ra_chain; 193 extern rwlock_t ip6_ra_lock; 194 195 /* 196 This structure is prepared by protocol, when parsing 197 ancillary data and passed to IPv6. 198 */ 199 200 struct ipv6_txoptions { 201 /* Length of this structure */ 202 int tot_len; 203 204 /* length of extension headers */ 205 206 __u16 opt_flen; /* after fragment hdr */ 207 __u16 opt_nflen; /* before fragment hdr */ 208 209 struct ipv6_opt_hdr *hopopt; 210 struct ipv6_opt_hdr *dst0opt; 211 struct ipv6_rt_hdr *srcrt; /* Routing Header */ 212 struct ipv6_opt_hdr *dst1opt; 213 214 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ 215 }; 216 217 struct ip6_flowlabel { 218 struct ip6_flowlabel *next; 219 __be32 label; 220 atomic_t users; 221 struct in6_addr dst; 222 struct ipv6_txoptions *opt; 223 unsigned long linger; 224 u8 share; 225 u32 owner; 226 unsigned long lastuse; 227 unsigned long expires; 228 struct net *fl_net; 229 }; 230 231 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) 232 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) 233 234 struct ipv6_fl_socklist { 235 struct ipv6_fl_socklist *next; 236 struct ip6_flowlabel *fl; 237 }; 238 239 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); 240 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, 241 struct ip6_flowlabel * fl, 242 struct ipv6_txoptions * fopt); 243 extern void fl6_free_socklist(struct sock *sk); 244 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); 245 extern int ip6_flowlabel_init(void); 246 extern void ip6_flowlabel_cleanup(void); 247 248 static inline void fl6_sock_release(struct ip6_flowlabel *fl) 249 { 250 if (fl) 251 atomic_dec(&fl->users); 252 } 253 254 extern void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); 255 256 extern int ip6_ra_control(struct sock *sk, int sel); 257 258 extern int ipv6_parse_hopopts(struct sk_buff *skb); 259 260 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); 261 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, 262 int newtype, 263 struct ipv6_opt_hdr __user *newopt, 264 int newoptlen); 265 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, 266 struct ipv6_txoptions *opt); 267 268 extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb); 269 270 int ip6_frag_nqueues(struct net *net); 271 int ip6_frag_mem(struct net *net); 272 273 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ 274 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ 275 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ 276 277 extern int __ipv6_addr_type(const struct in6_addr *addr); 278 static inline int ipv6_addr_type(const struct in6_addr *addr) 279 { 280 return __ipv6_addr_type(addr) & 0xffff; 281 } 282 283 static inline int ipv6_addr_scope(const struct in6_addr *addr) 284 { 285 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; 286 } 287 288 static inline int __ipv6_addr_src_scope(int type) 289 { 290 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); 291 } 292 293 static inline int ipv6_addr_src_scope(const struct in6_addr *addr) 294 { 295 return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); 296 } 297 298 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) 299 { 300 return memcmp(a1, a2, sizeof(struct in6_addr)); 301 } 302 303 static inline bool 304 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, 305 const struct in6_addr *a2) 306 { 307 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 308 const unsigned long *ul1 = (const unsigned long *)a1; 309 const unsigned long *ulm = (const unsigned long *)m; 310 const unsigned long *ul2 = (const unsigned long *)a2; 311 312 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | 313 ((ul1[1] ^ ul2[1]) & ulm[1])); 314 #else 315 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | 316 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | 317 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | 318 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); 319 #endif 320 } 321 322 static inline void ipv6_addr_prefix(struct in6_addr *pfx, 323 const struct in6_addr *addr, 324 int plen) 325 { 326 /* caller must guarantee 0 <= plen <= 128 */ 327 int o = plen >> 3, 328 b = plen & 0x7; 329 330 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); 331 memcpy(pfx->s6_addr, addr, o); 332 if (b != 0) 333 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); 334 } 335 336 static inline void ipv6_addr_set(struct in6_addr *addr, 337 __be32 w1, __be32 w2, 338 __be32 w3, __be32 w4) 339 { 340 addr->s6_addr32[0] = w1; 341 addr->s6_addr32[1] = w2; 342 addr->s6_addr32[2] = w3; 343 addr->s6_addr32[3] = w4; 344 } 345 346 static inline bool ipv6_addr_equal(const struct in6_addr *a1, 347 const struct in6_addr *a2) 348 { 349 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 350 const unsigned long *ul1 = (const unsigned long *)a1; 351 const unsigned long *ul2 = (const unsigned long *)a2; 352 353 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; 354 #else 355 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | 356 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | 357 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | 358 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; 359 #endif 360 } 361 362 static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, 363 unsigned int prefixlen) 364 { 365 unsigned int pdw, pbi; 366 367 /* check complete u32 in prefix */ 368 pdw = prefixlen >> 5; 369 if (pdw && memcmp(a1, a2, pdw << 2)) 370 return false; 371 372 /* check incomplete u32 in prefix */ 373 pbi = prefixlen & 0x1f; 374 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) 375 return false; 376 377 return true; 378 } 379 380 static inline bool ipv6_prefix_equal(const struct in6_addr *a1, 381 const struct in6_addr *a2, 382 unsigned int prefixlen) 383 { 384 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, 385 prefixlen); 386 } 387 388 struct inet_frag_queue; 389 390 enum ip6_defrag_users { 391 IP6_DEFRAG_LOCAL_DELIVER, 392 IP6_DEFRAG_CONNTRACK_IN, 393 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, 394 IP6_DEFRAG_CONNTRACK_OUT, 395 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, 396 IP6_DEFRAG_CONNTRACK_BRIDGE_IN, 397 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, 398 }; 399 400 struct ip6_create_arg { 401 __be32 id; 402 u32 user; 403 const struct in6_addr *src; 404 const struct in6_addr *dst; 405 }; 406 407 void ip6_frag_init(struct inet_frag_queue *q, void *a); 408 bool ip6_frag_match(struct inet_frag_queue *q, void *a); 409 410 static inline bool ipv6_addr_any(const struct in6_addr *a) 411 { 412 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 413 const unsigned long *ul = (const unsigned long *)a; 414 415 return (ul[0] | ul[1]) == 0UL; 416 #else 417 return (a->s6_addr32[0] | a->s6_addr32[1] | 418 a->s6_addr32[2] | a->s6_addr32[3]) == 0; 419 #endif 420 } 421 422 static inline u32 ipv6_addr_hash(const struct in6_addr *a) 423 { 424 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 425 const unsigned long *ul = (const unsigned long *)a; 426 unsigned long x = ul[0] ^ ul[1]; 427 428 return (u32)(x ^ (x >> 32)); 429 #else 430 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ 431 a->s6_addr32[2] ^ a->s6_addr32[3]); 432 #endif 433 } 434 435 static inline bool ipv6_addr_loopback(const struct in6_addr *a) 436 { 437 return (a->s6_addr32[0] | a->s6_addr32[1] | 438 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; 439 } 440 441 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) 442 { 443 return (a->s6_addr32[0] | a->s6_addr32[1] | 444 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; 445 } 446 447 /* 448 * Check for a RFC 4843 ORCHID address 449 * (Overlay Routable Cryptographic Hash Identifiers) 450 */ 451 static inline bool ipv6_addr_orchid(const struct in6_addr *a) 452 { 453 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); 454 } 455 456 static inline void ipv6_addr_set_v4mapped(const __be32 addr, 457 struct in6_addr *v4mapped) 458 { 459 ipv6_addr_set(v4mapped, 460 0, 0, 461 htonl(0x0000FFFF), 462 addr); 463 } 464 465 /* 466 * find the first different bit between two addresses 467 * length of address must be a multiple of 32bits 468 */ 469 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) 470 { 471 const __be32 *a1 = token1, *a2 = token2; 472 int i; 473 474 addrlen >>= 2; 475 476 for (i = 0; i < addrlen; i++) { 477 __be32 xb = a1[i] ^ a2[i]; 478 if (xb) 479 return i * 32 + 31 - __fls(ntohl(xb)); 480 } 481 482 /* 483 * we should *never* get to this point since that 484 * would mean the addrs are equal 485 * 486 * However, we do get to it 8) And exacly, when 487 * addresses are equal 8) 488 * 489 * ip route add 1111::/128 via ... 490 * ip route add 1111::/64 via ... 491 * and we are here. 492 * 493 * Ideally, this function should stop comparison 494 * at prefix length. It does not, but it is still OK, 495 * if returned value is greater than prefix length. 496 * --ANK (980803) 497 */ 498 return addrlen << 5; 499 } 500 501 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) 502 { 503 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); 504 } 505 506 extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); 507 508 /* 509 * Prototypes exported by ipv6 510 */ 511 512 /* 513 * rcv function (called from netdevice level) 514 */ 515 516 extern int ipv6_rcv(struct sk_buff *skb, 517 struct net_device *dev, 518 struct packet_type *pt, 519 struct net_device *orig_dev); 520 521 extern int ip6_rcv_finish(struct sk_buff *skb); 522 523 /* 524 * upper-layer output functions 525 */ 526 extern int ip6_xmit(struct sock *sk, 527 struct sk_buff *skb, 528 struct flowi6 *fl6, 529 struct ipv6_txoptions *opt, 530 int tclass); 531 532 extern int ip6_nd_hdr(struct sock *sk, 533 struct sk_buff *skb, 534 struct net_device *dev, 535 const struct in6_addr *saddr, 536 const struct in6_addr *daddr, 537 int proto, int len); 538 539 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); 540 541 extern int ip6_append_data(struct sock *sk, 542 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), 543 void *from, 544 int length, 545 int transhdrlen, 546 int hlimit, 547 int tclass, 548 struct ipv6_txoptions *opt, 549 struct flowi6 *fl6, 550 struct rt6_info *rt, 551 unsigned int flags, 552 int dontfrag); 553 554 extern int ip6_push_pending_frames(struct sock *sk); 555 556 extern void ip6_flush_pending_frames(struct sock *sk); 557 558 extern int ip6_dst_lookup(struct sock *sk, 559 struct dst_entry **dst, 560 struct flowi6 *fl6); 561 extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, 562 struct flowi6 *fl6, 563 const struct in6_addr *final_dst, 564 bool can_sleep); 565 extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, 566 struct flowi6 *fl6, 567 const struct in6_addr *final_dst, 568 bool can_sleep); 569 extern struct dst_entry * ip6_blackhole_route(struct net *net, 570 struct dst_entry *orig_dst); 571 572 /* 573 * skb processing functions 574 */ 575 576 extern int ip6_output(struct sk_buff *skb); 577 extern int ip6_forward(struct sk_buff *skb); 578 extern int ip6_input(struct sk_buff *skb); 579 extern int ip6_mc_input(struct sk_buff *skb); 580 581 extern int __ip6_local_out(struct sk_buff *skb); 582 extern int ip6_local_out(struct sk_buff *skb); 583 584 /* 585 * Extension header (options) processing 586 */ 587 588 extern void ipv6_push_nfrag_opts(struct sk_buff *skb, 589 struct ipv6_txoptions *opt, 590 u8 *proto, 591 struct in6_addr **daddr_p); 592 extern void ipv6_push_frag_opts(struct sk_buff *skb, 593 struct ipv6_txoptions *opt, 594 u8 *proto); 595 596 extern int ipv6_skip_exthdr(const struct sk_buff *, int start, 597 u8 *nexthdrp, __be16 *frag_offp); 598 599 extern bool ipv6_ext_hdr(u8 nexthdr); 600 601 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); 602 603 extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6, 604 const struct ipv6_txoptions *opt, 605 struct in6_addr *orig); 606 607 /* 608 * socket options (ipv6_sockglue.c) 609 */ 610 611 extern int ipv6_setsockopt(struct sock *sk, int level, 612 int optname, 613 char __user *optval, 614 unsigned int optlen); 615 extern int ipv6_getsockopt(struct sock *sk, int level, 616 int optname, 617 char __user *optval, 618 int __user *optlen); 619 extern int compat_ipv6_setsockopt(struct sock *sk, 620 int level, 621 int optname, 622 char __user *optval, 623 unsigned int optlen); 624 extern int compat_ipv6_getsockopt(struct sock *sk, 625 int level, 626 int optname, 627 char __user *optval, 628 int __user *optlen); 629 630 extern int ip6_datagram_connect(struct sock *sk, 631 struct sockaddr *addr, int addr_len); 632 633 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); 634 extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); 635 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, 636 u32 info, u8 *payload); 637 extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); 638 extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); 639 640 extern int inet6_release(struct socket *sock); 641 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 642 int addr_len); 643 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 644 int *uaddr_len, int peer); 645 extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 646 unsigned long arg); 647 648 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, 649 struct sock *sk); 650 651 /* 652 * reassembly.c 653 */ 654 extern const struct proto_ops inet6_stream_ops; 655 extern const struct proto_ops inet6_dgram_ops; 656 657 struct group_source_req; 658 struct group_filter; 659 660 extern int ip6_mc_source(int add, int omode, struct sock *sk, 661 struct group_source_req *pgsr); 662 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); 663 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, 664 struct group_filter __user *optval, 665 int __user *optlen); 666 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, 667 const struct in6_addr *daddr, u32 rnd); 668 669 #ifdef CONFIG_PROC_FS 670 extern int ac6_proc_init(struct net *net); 671 extern void ac6_proc_exit(struct net *net); 672 extern int raw6_proc_init(void); 673 extern void raw6_proc_exit(void); 674 extern int tcp6_proc_init(struct net *net); 675 extern void tcp6_proc_exit(struct net *net); 676 extern int udp6_proc_init(struct net *net); 677 extern void udp6_proc_exit(struct net *net); 678 extern int udplite6_proc_init(void); 679 extern void udplite6_proc_exit(void); 680 extern int ipv6_misc_proc_init(void); 681 extern void ipv6_misc_proc_exit(void); 682 extern int snmp6_register_dev(struct inet6_dev *idev); 683 extern int snmp6_unregister_dev(struct inet6_dev *idev); 684 685 #else 686 static inline int ac6_proc_init(struct net *net) { return 0; } 687 static inline void ac6_proc_exit(struct net *net) { } 688 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } 689 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } 690 #endif 691 692 #ifdef CONFIG_SYSCTL 693 extern ctl_table ipv6_route_table_template[]; 694 extern ctl_table ipv6_icmp_table_template[]; 695 696 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); 697 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); 698 extern int ipv6_sysctl_register(void); 699 extern void ipv6_sysctl_unregister(void); 700 #endif 701 702 #endif /* _NET_IPV6_H */ 703