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 * fragmentation header 93 */ 94 95 struct frag_hdr { 96 __u8 nexthdr; 97 __u8 reserved; 98 __be16 frag_off; 99 __be32 identification; 100 }; 101 102 #define IP6_MF 0x0001 103 104 #ifdef __KERNEL__ 105 106 #include <net/sock.h> 107 108 /* sysctls */ 109 extern int sysctl_mld_max_msf; 110 extern struct ctl_path net_ipv6_ctl_path[]; 111 112 #define _DEVINC(net, statname, modifier, idev, field) \ 113 ({ \ 114 struct inet6_dev *_idev = (idev); \ 115 if (likely(_idev != NULL)) \ 116 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ 117 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ 118 }) 119 120 #define _DEVADD(net, statname, modifier, idev, field, val) \ 121 ({ \ 122 struct inet6_dev *_idev = (idev); \ 123 if (likely(_idev != NULL)) \ 124 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ 125 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ 126 }) 127 128 #define _DEVUPD(net, statname, modifier, idev, field, val) \ 129 ({ \ 130 struct inet6_dev *_idev = (idev); \ 131 if (likely(_idev != NULL)) \ 132 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ 133 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ 134 }) 135 136 /* MIBs */ 137 138 #define IP6_INC_STATS(net, idev,field) \ 139 _DEVINC(net, ipv6, 64, idev, field) 140 #define IP6_INC_STATS_BH(net, idev,field) \ 141 _DEVINC(net, ipv6, 64_BH, idev, field) 142 #define IP6_ADD_STATS(net, idev,field,val) \ 143 _DEVADD(net, ipv6, 64, idev, field, val) 144 #define IP6_ADD_STATS_BH(net, idev,field,val) \ 145 _DEVADD(net, ipv6, 64_BH, idev, field, val) 146 #define IP6_UPD_PO_STATS(net, idev,field,val) \ 147 _DEVUPD(net, ipv6, 64, idev, field, val) 148 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ 149 _DEVUPD(net, ipv6, 64_BH, idev, field, val) 150 #define ICMP6_INC_STATS(net, idev, field) \ 151 _DEVINC(net, icmpv6, , idev, field) 152 #define ICMP6_INC_STATS_BH(net, idev, field) \ 153 _DEVINC(net, icmpv6, _BH, idev, field) 154 155 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ 156 _DEVINC(net, icmpv6msg, , idev, field +256) 157 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ 158 _DEVINC(net, icmpv6msg, _BH, idev, field +256) 159 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ 160 _DEVINC(net, icmpv6msg, _BH, idev, field) 161 162 struct ip6_ra_chain { 163 struct ip6_ra_chain *next; 164 struct sock *sk; 165 int sel; 166 void (*destructor)(struct sock *); 167 }; 168 169 extern struct ip6_ra_chain *ip6_ra_chain; 170 extern rwlock_t ip6_ra_lock; 171 172 /* 173 This structure is prepared by protocol, when parsing 174 ancillary data and passed to IPv6. 175 */ 176 177 struct ipv6_txoptions { 178 /* Length of this structure */ 179 int tot_len; 180 181 /* length of extension headers */ 182 183 __u16 opt_flen; /* after fragment hdr */ 184 __u16 opt_nflen; /* before fragment hdr */ 185 186 struct ipv6_opt_hdr *hopopt; 187 struct ipv6_opt_hdr *dst0opt; 188 struct ipv6_rt_hdr *srcrt; /* Routing Header */ 189 struct ipv6_opt_hdr *dst1opt; 190 191 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ 192 }; 193 194 struct ip6_flowlabel { 195 struct ip6_flowlabel *next; 196 __be32 label; 197 atomic_t users; 198 struct in6_addr dst; 199 struct ipv6_txoptions *opt; 200 unsigned long linger; 201 u8 share; 202 u32 owner; 203 unsigned long lastuse; 204 unsigned long expires; 205 struct net *fl_net; 206 }; 207 208 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) 209 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) 210 211 struct ipv6_fl_socklist { 212 struct ipv6_fl_socklist *next; 213 struct ip6_flowlabel *fl; 214 }; 215 216 extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); 217 extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, 218 struct ip6_flowlabel * fl, 219 struct ipv6_txoptions * fopt); 220 extern void fl6_free_socklist(struct sock *sk); 221 extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); 222 extern int ip6_flowlabel_init(void); 223 extern void ip6_flowlabel_cleanup(void); 224 225 static inline void fl6_sock_release(struct ip6_flowlabel *fl) 226 { 227 if (fl) 228 atomic_dec(&fl->users); 229 } 230 231 extern int ip6_ra_control(struct sock *sk, int sel); 232 233 extern int ipv6_parse_hopopts(struct sk_buff *skb); 234 235 extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); 236 extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, 237 int newtype, 238 struct ipv6_opt_hdr __user *newopt, 239 int newoptlen); 240 struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, 241 struct ipv6_txoptions *opt); 242 243 extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); 244 245 int ip6_frag_nqueues(struct net *net); 246 int ip6_frag_mem(struct net *net); 247 248 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ 249 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ 250 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ 251 252 extern int __ipv6_addr_type(const struct in6_addr *addr); 253 static inline int ipv6_addr_type(const struct in6_addr *addr) 254 { 255 return __ipv6_addr_type(addr) & 0xffff; 256 } 257 258 static inline int ipv6_addr_scope(const struct in6_addr *addr) 259 { 260 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; 261 } 262 263 static inline int __ipv6_addr_src_scope(int type) 264 { 265 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); 266 } 267 268 static inline int ipv6_addr_src_scope(const struct in6_addr *addr) 269 { 270 return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); 271 } 272 273 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) 274 { 275 return memcmp(a1, a2, sizeof(struct in6_addr)); 276 } 277 278 static inline int 279 ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, 280 const struct in6_addr *a2) 281 { 282 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | 283 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | 284 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | 285 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); 286 } 287 288 static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) 289 { 290 memcpy(a1, a2, sizeof(struct in6_addr)); 291 } 292 293 static inline void ipv6_addr_prefix(struct in6_addr *pfx, 294 const struct in6_addr *addr, 295 int plen) 296 { 297 /* caller must guarantee 0 <= plen <= 128 */ 298 int o = plen >> 3, 299 b = plen & 0x7; 300 301 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); 302 memcpy(pfx->s6_addr, addr, o); 303 if (b != 0) 304 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); 305 } 306 307 static inline void ipv6_addr_set(struct in6_addr *addr, 308 __be32 w1, __be32 w2, 309 __be32 w3, __be32 w4) 310 { 311 addr->s6_addr32[0] = w1; 312 addr->s6_addr32[1] = w2; 313 addr->s6_addr32[2] = w3; 314 addr->s6_addr32[3] = w4; 315 } 316 317 static inline int ipv6_addr_equal(const struct in6_addr *a1, 318 const struct in6_addr *a2) 319 { 320 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | 321 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | 322 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | 323 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; 324 } 325 326 static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, 327 unsigned int prefixlen) 328 { 329 unsigned pdw, pbi; 330 331 /* check complete u32 in prefix */ 332 pdw = prefixlen >> 5; 333 if (pdw && memcmp(a1, a2, pdw << 2)) 334 return 0; 335 336 /* check incomplete u32 in prefix */ 337 pbi = prefixlen & 0x1f; 338 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) 339 return 0; 340 341 return 1; 342 } 343 344 static inline int ipv6_prefix_equal(const struct in6_addr *a1, 345 const struct in6_addr *a2, 346 unsigned int prefixlen) 347 { 348 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, 349 prefixlen); 350 } 351 352 struct inet_frag_queue; 353 354 enum ip6_defrag_users { 355 IP6_DEFRAG_LOCAL_DELIVER, 356 IP6_DEFRAG_CONNTRACK_IN, 357 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, 358 IP6_DEFRAG_CONNTRACK_OUT, 359 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, 360 IP6_DEFRAG_CONNTRACK_BRIDGE_IN, 361 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, 362 }; 363 364 struct ip6_create_arg { 365 __be32 id; 366 u32 user; 367 struct in6_addr *src; 368 struct in6_addr *dst; 369 }; 370 371 void ip6_frag_init(struct inet_frag_queue *q, void *a); 372 int ip6_frag_match(struct inet_frag_queue *q, void *a); 373 374 static inline int ipv6_addr_any(const struct in6_addr *a) 375 { 376 return (a->s6_addr32[0] | a->s6_addr32[1] | 377 a->s6_addr32[2] | a->s6_addr32[3]) == 0; 378 } 379 380 static inline int ipv6_addr_loopback(const struct in6_addr *a) 381 { 382 return (a->s6_addr32[0] | a->s6_addr32[1] | 383 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; 384 } 385 386 static inline int ipv6_addr_v4mapped(const struct in6_addr *a) 387 { 388 return (a->s6_addr32[0] | a->s6_addr32[1] | 389 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; 390 } 391 392 /* 393 * Check for a RFC 4843 ORCHID address 394 * (Overlay Routable Cryptographic Hash Identifiers) 395 */ 396 static inline int ipv6_addr_orchid(const struct in6_addr *a) 397 { 398 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); 399 } 400 401 static inline void ipv6_addr_set_v4mapped(const __be32 addr, 402 struct in6_addr *v4mapped) 403 { 404 ipv6_addr_set(v4mapped, 405 0, 0, 406 htonl(0x0000FFFF), 407 addr); 408 } 409 410 /* 411 * find the first different bit between two addresses 412 * length of address must be a multiple of 32bits 413 */ 414 static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) 415 { 416 const __be32 *a1 = token1, *a2 = token2; 417 int i; 418 419 addrlen >>= 2; 420 421 for (i = 0; i < addrlen; i++) { 422 __be32 xb = a1[i] ^ a2[i]; 423 if (xb) 424 return i * 32 + 31 - __fls(ntohl(xb)); 425 } 426 427 /* 428 * we should *never* get to this point since that 429 * would mean the addrs are equal 430 * 431 * However, we do get to it 8) And exacly, when 432 * addresses are equal 8) 433 * 434 * ip route add 1111::/128 via ... 435 * ip route add 1111::/64 via ... 436 * and we are here. 437 * 438 * Ideally, this function should stop comparison 439 * at prefix length. It does not, but it is still OK, 440 * if returned value is greater than prefix length. 441 * --ANK (980803) 442 */ 443 return addrlen << 5; 444 } 445 446 static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) 447 { 448 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); 449 } 450 451 static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr) 452 { 453 static u32 ipv6_fragmentation_id = 1; 454 static DEFINE_SPINLOCK(ip6_id_lock); 455 456 spin_lock_bh(&ip6_id_lock); 457 fhdr->identification = htonl(ipv6_fragmentation_id); 458 if (++ipv6_fragmentation_id == 0) 459 ipv6_fragmentation_id = 1; 460 spin_unlock_bh(&ip6_id_lock); 461 } 462 463 /* 464 * Prototypes exported by ipv6 465 */ 466 467 /* 468 * rcv function (called from netdevice level) 469 */ 470 471 extern int ipv6_rcv(struct sk_buff *skb, 472 struct net_device *dev, 473 struct packet_type *pt, 474 struct net_device *orig_dev); 475 476 extern int ip6_rcv_finish(struct sk_buff *skb); 477 478 /* 479 * upper-layer output functions 480 */ 481 extern int ip6_xmit(struct sock *sk, 482 struct sk_buff *skb, 483 struct flowi *fl, 484 struct ipv6_txoptions *opt); 485 486 extern int ip6_nd_hdr(struct sock *sk, 487 struct sk_buff *skb, 488 struct net_device *dev, 489 const struct in6_addr *saddr, 490 const struct in6_addr *daddr, 491 int proto, int len); 492 493 extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); 494 495 extern int ip6_append_data(struct sock *sk, 496 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), 497 void *from, 498 int length, 499 int transhdrlen, 500 int hlimit, 501 int tclass, 502 struct ipv6_txoptions *opt, 503 struct flowi *fl, 504 struct rt6_info *rt, 505 unsigned int flags, 506 int dontfrag); 507 508 extern int ip6_push_pending_frames(struct sock *sk); 509 510 extern void ip6_flush_pending_frames(struct sock *sk); 511 512 extern int ip6_dst_lookup(struct sock *sk, 513 struct dst_entry **dst, 514 struct flowi *fl); 515 extern int ip6_dst_blackhole(struct sock *sk, 516 struct dst_entry **dst, 517 struct flowi *fl); 518 extern int ip6_sk_dst_lookup(struct sock *sk, 519 struct dst_entry **dst, 520 struct flowi *fl); 521 522 /* 523 * skb processing functions 524 */ 525 526 extern int ip6_output(struct sk_buff *skb); 527 extern int ip6_forward(struct sk_buff *skb); 528 extern int ip6_input(struct sk_buff *skb); 529 extern int ip6_mc_input(struct sk_buff *skb); 530 531 extern int __ip6_local_out(struct sk_buff *skb); 532 extern int ip6_local_out(struct sk_buff *skb); 533 534 /* 535 * Extension header (options) processing 536 */ 537 538 extern void ipv6_push_nfrag_opts(struct sk_buff *skb, 539 struct ipv6_txoptions *opt, 540 u8 *proto, 541 struct in6_addr **daddr_p); 542 extern void ipv6_push_frag_opts(struct sk_buff *skb, 543 struct ipv6_txoptions *opt, 544 u8 *proto); 545 546 extern int ipv6_skip_exthdr(const struct sk_buff *, int start, 547 u8 *nexthdrp); 548 549 extern int ipv6_ext_hdr(u8 nexthdr); 550 551 extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); 552 553 extern struct in6_addr *fl6_update_dst(struct flowi *fl, 554 const struct ipv6_txoptions *opt, 555 struct in6_addr *orig); 556 557 /* 558 * socket options (ipv6_sockglue.c) 559 */ 560 561 extern int ipv6_setsockopt(struct sock *sk, int level, 562 int optname, 563 char __user *optval, 564 unsigned int optlen); 565 extern int ipv6_getsockopt(struct sock *sk, int level, 566 int optname, 567 char __user *optval, 568 int __user *optlen); 569 extern int compat_ipv6_setsockopt(struct sock *sk, 570 int level, 571 int optname, 572 char __user *optval, 573 unsigned int optlen); 574 extern int compat_ipv6_getsockopt(struct sock *sk, 575 int level, 576 int optname, 577 char __user *optval, 578 int __user *optlen); 579 580 extern int ip6_datagram_connect(struct sock *sk, 581 struct sockaddr *addr, int addr_len); 582 583 extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); 584 extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); 585 extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, 586 u32 info, u8 *payload); 587 extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info); 588 extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi *fl, u32 mtu); 589 590 extern int inet6_release(struct socket *sock); 591 extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 592 int addr_len); 593 extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 594 int *uaddr_len, int peer); 595 extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 596 unsigned long arg); 597 598 extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, 599 struct sock *sk); 600 601 /* 602 * reassembly.c 603 */ 604 extern const struct proto_ops inet6_stream_ops; 605 extern const struct proto_ops inet6_dgram_ops; 606 607 struct group_source_req; 608 struct group_filter; 609 610 extern int ip6_mc_source(int add, int omode, struct sock *sk, 611 struct group_source_req *pgsr); 612 extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); 613 extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, 614 struct group_filter __user *optval, 615 int __user *optlen); 616 extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, 617 const struct in6_addr *daddr, u32 rnd); 618 619 #ifdef CONFIG_PROC_FS 620 extern int ac6_proc_init(struct net *net); 621 extern void ac6_proc_exit(struct net *net); 622 extern int raw6_proc_init(void); 623 extern void raw6_proc_exit(void); 624 extern int tcp6_proc_init(struct net *net); 625 extern void tcp6_proc_exit(struct net *net); 626 extern int udp6_proc_init(struct net *net); 627 extern void udp6_proc_exit(struct net *net); 628 extern int udplite6_proc_init(void); 629 extern void udplite6_proc_exit(void); 630 extern int ipv6_misc_proc_init(void); 631 extern void ipv6_misc_proc_exit(void); 632 extern int snmp6_register_dev(struct inet6_dev *idev); 633 extern int snmp6_unregister_dev(struct inet6_dev *idev); 634 635 #else 636 static inline int ac6_proc_init(struct net *net) { return 0; } 637 static inline void ac6_proc_exit(struct net *net) { } 638 static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } 639 static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } 640 #endif 641 642 #ifdef CONFIG_SYSCTL 643 extern ctl_table ipv6_route_table_template[]; 644 extern ctl_table ipv6_icmp_table_template[]; 645 646 extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); 647 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); 648 extern int ipv6_sysctl_register(void); 649 extern void ipv6_sysctl_unregister(void); 650 extern int ipv6_static_sysctl_register(void); 651 extern void ipv6_static_sysctl_unregister(void); 652 #endif 653 654 #endif /* __KERNEL__ */ 655 #endif /* _NET_IPV6_H */ 656