1 #ifndef _IPV6_H 2 #define _IPV6_H 3 4 #include <linux/types.h> 5 #include <linux/in6.h> 6 #include <asm/byteorder.h> 7 8 /* The latest drafts declared increase in minimal mtu up to 1280. */ 9 10 #define IPV6_MIN_MTU 1280 11 12 /* 13 * Advanced API 14 * source interface/address selection, source routing, etc... 15 * *under construction* 16 */ 17 18 19 struct in6_pktinfo { 20 struct in6_addr ipi6_addr; 21 int ipi6_ifindex; 22 }; 23 24 struct ip6_mtuinfo { 25 struct sockaddr_in6 ip6m_addr; 26 __u32 ip6m_mtu; 27 }; 28 29 struct in6_ifreq { 30 struct in6_addr ifr6_addr; 31 __u32 ifr6_prefixlen; 32 int ifr6_ifindex; 33 }; 34 35 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ 36 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ 37 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ 38 39 /* 40 * routing header 41 */ 42 struct ipv6_rt_hdr { 43 __u8 nexthdr; 44 __u8 hdrlen; 45 __u8 type; 46 __u8 segments_left; 47 48 /* 49 * type specific data 50 * variable length field 51 */ 52 }; 53 54 55 struct ipv6_opt_hdr { 56 __u8 nexthdr; 57 __u8 hdrlen; 58 /* 59 * TLV encoded option data follows. 60 */ 61 } __attribute__((packed)); /* required for some archs */ 62 63 #define ipv6_destopt_hdr ipv6_opt_hdr 64 #define ipv6_hopopt_hdr ipv6_opt_hdr 65 66 #ifdef __KERNEL__ 67 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) 68 #endif 69 70 /* 71 * routing header type 0 (used in cmsghdr struct) 72 */ 73 74 struct rt0_hdr { 75 struct ipv6_rt_hdr rt_hdr; 76 __u32 reserved; 77 struct in6_addr addr[0]; 78 79 #define rt0_type rt_hdr.type 80 }; 81 82 /* 83 * routing header type 2 84 */ 85 86 struct rt2_hdr { 87 struct ipv6_rt_hdr rt_hdr; 88 __u32 reserved; 89 struct in6_addr addr; 90 91 #define rt2_type rt_hdr.type 92 }; 93 94 /* 95 * home address option in destination options header 96 */ 97 98 struct ipv6_destopt_hao { 99 __u8 type; 100 __u8 length; 101 struct in6_addr addr; 102 } __attribute__((packed)); 103 104 /* 105 * IPv6 fixed header 106 * 107 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 108 * are glued to priority now, forming "class". 109 */ 110 111 struct ipv6hdr { 112 #if defined(__LITTLE_ENDIAN_BITFIELD) 113 __u8 priority:4, 114 version:4; 115 #elif defined(__BIG_ENDIAN_BITFIELD) 116 __u8 version:4, 117 priority:4; 118 #else 119 #error "Please fix <asm/byteorder.h>" 120 #endif 121 __u8 flow_lbl[3]; 122 123 __be16 payload_len; 124 __u8 nexthdr; 125 __u8 hop_limit; 126 127 struct in6_addr saddr; 128 struct in6_addr daddr; 129 }; 130 131 #ifdef __KERNEL__ 132 /* 133 * This structure contains configuration options per IPv6 link. 134 */ 135 struct ipv6_devconf { 136 __s32 forwarding; 137 __s32 hop_limit; 138 __s32 mtu6; 139 __s32 accept_ra; 140 __s32 accept_redirects; 141 __s32 autoconf; 142 __s32 dad_transmits; 143 __s32 rtr_solicits; 144 __s32 rtr_solicit_interval; 145 __s32 rtr_solicit_delay; 146 __s32 force_mld_version; 147 #ifdef CONFIG_IPV6_PRIVACY 148 __s32 use_tempaddr; 149 __s32 temp_valid_lft; 150 __s32 temp_prefered_lft; 151 __s32 regen_max_retry; 152 __s32 max_desync_factor; 153 #endif 154 __s32 max_addresses; 155 __s32 accept_ra_defrtr; 156 __s32 accept_ra_pinfo; 157 #ifdef CONFIG_IPV6_ROUTER_PREF 158 __s32 accept_ra_rtr_pref; 159 __s32 rtr_probe_interval; 160 #ifdef CONFIG_IPV6_ROUTE_INFO 161 __s32 accept_ra_rt_info_max_plen; 162 #endif 163 #endif 164 __s32 proxy_ndp; 165 __s32 accept_source_route; 166 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 167 __s32 optimistic_dad; 168 #endif 169 #ifdef CONFIG_IPV6_MROUTE 170 __s32 mc_forwarding; 171 #endif 172 __s32 disable_ipv6; 173 __s32 accept_dad; 174 __s32 force_tllao; 175 void *sysctl; 176 }; 177 178 struct ipv6_params { 179 __s32 disable_ipv6; 180 __s32 autoconf; 181 }; 182 extern struct ipv6_params ipv6_defaults; 183 #endif 184 185 /* index values for the variables in ipv6_devconf */ 186 enum { 187 DEVCONF_FORWARDING = 0, 188 DEVCONF_HOPLIMIT, 189 DEVCONF_MTU6, 190 DEVCONF_ACCEPT_RA, 191 DEVCONF_ACCEPT_REDIRECTS, 192 DEVCONF_AUTOCONF, 193 DEVCONF_DAD_TRANSMITS, 194 DEVCONF_RTR_SOLICITS, 195 DEVCONF_RTR_SOLICIT_INTERVAL, 196 DEVCONF_RTR_SOLICIT_DELAY, 197 DEVCONF_USE_TEMPADDR, 198 DEVCONF_TEMP_VALID_LFT, 199 DEVCONF_TEMP_PREFERED_LFT, 200 DEVCONF_REGEN_MAX_RETRY, 201 DEVCONF_MAX_DESYNC_FACTOR, 202 DEVCONF_MAX_ADDRESSES, 203 DEVCONF_FORCE_MLD_VERSION, 204 DEVCONF_ACCEPT_RA_DEFRTR, 205 DEVCONF_ACCEPT_RA_PINFO, 206 DEVCONF_ACCEPT_RA_RTR_PREF, 207 DEVCONF_RTR_PROBE_INTERVAL, 208 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 209 DEVCONF_PROXY_NDP, 210 DEVCONF_OPTIMISTIC_DAD, 211 DEVCONF_ACCEPT_SOURCE_ROUTE, 212 DEVCONF_MC_FORWARDING, 213 DEVCONF_DISABLE_IPV6, 214 DEVCONF_ACCEPT_DAD, 215 DEVCONF_FORCE_TLLAO, 216 DEVCONF_MAX 217 }; 218 219 #ifdef __KERNEL__ 220 #include <linux/icmpv6.h> 221 #include <linux/tcp.h> 222 #include <linux/udp.h> 223 224 #include <net/inet_sock.h> 225 226 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) 227 { 228 return (struct ipv6hdr *)skb_network_header(skb); 229 } 230 231 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) 232 { 233 return (struct ipv6hdr *)skb_transport_header(skb); 234 } 235 236 /* 237 This structure contains results of exthdrs parsing 238 as offsets from skb->nh. 239 */ 240 241 struct inet6_skb_parm { 242 int iif; 243 __u16 ra; 244 __u16 hop; 245 __u16 dst0; 246 __u16 srcrt; 247 __u16 dst1; 248 __u16 lastopt; 249 __u16 nhoff; 250 __u16 flags; 251 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 252 __u16 dsthao; 253 #endif 254 255 #define IP6SKB_XFRM_TRANSFORMED 1 256 #define IP6SKB_FORWARDED 2 257 #define IP6SKB_REROUTED 4 258 }; 259 260 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) 261 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) 262 263 static inline int inet6_iif(const struct sk_buff *skb) 264 { 265 return IP6CB(skb)->iif; 266 } 267 268 struct inet6_request_sock { 269 struct in6_addr loc_addr; 270 struct in6_addr rmt_addr; 271 struct sk_buff *pktopts; 272 int iif; 273 }; 274 275 struct tcp6_request_sock { 276 struct tcp_request_sock tcp6rsk_tcp; 277 struct inet6_request_sock tcp6rsk_inet6; 278 }; 279 280 struct ipv6_mc_socklist; 281 struct ipv6_ac_socklist; 282 struct ipv6_fl_socklist; 283 284 /** 285 * struct ipv6_pinfo - ipv6 private area 286 * 287 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) 288 * this _must_ be the last member, so that inet6_sk_generic 289 * is able to calculate its offset from the base struct sock 290 * by using the struct proto->slab_obj_size member. -acme 291 */ 292 struct ipv6_pinfo { 293 struct in6_addr saddr; 294 struct in6_addr rcv_saddr; 295 struct in6_addr daddr; 296 struct in6_pktinfo sticky_pktinfo; 297 struct in6_addr *daddr_cache; 298 #ifdef CONFIG_IPV6_SUBTREES 299 struct in6_addr *saddr_cache; 300 #endif 301 302 __be32 flow_label; 303 __u32 frag_size; 304 305 /* 306 * Packed in 16bits. 307 * Omit one shift by by putting the signed field at MSB. 308 */ 309 #if defined(__BIG_ENDIAN_BITFIELD) 310 __s16 hop_limit:9; 311 __u16 __unused_1:7; 312 #else 313 __u16 __unused_1:7; 314 __s16 hop_limit:9; 315 #endif 316 317 #if defined(__BIG_ENDIAN_BITFIELD) 318 /* Packed in 16bits. */ 319 __s16 mcast_hops:9; 320 __u16 __unused_2:6, 321 mc_loop:1; 322 #else 323 __u16 mc_loop:1, 324 __unused_2:6; 325 __s16 mcast_hops:9; 326 #endif 327 int mcast_oif; 328 329 /* pktoption flags */ 330 union { 331 struct { 332 __u16 srcrt:1, 333 osrcrt:1, 334 rxinfo:1, 335 rxoinfo:1, 336 rxhlim:1, 337 rxohlim:1, 338 hopopts:1, 339 ohopopts:1, 340 dstopts:1, 341 odstopts:1, 342 rxflow:1, 343 rxtclass:1, 344 rxpmtu:1, 345 rxorigdstaddr:1; 346 /* 2 bits hole */ 347 } bits; 348 __u16 all; 349 } rxopt; 350 351 /* sockopt flags */ 352 __u16 recverr:1, 353 sndflow:1, 354 pmtudisc:2, 355 ipv6only:1, 356 srcprefs:3, /* 001: prefer temporary address 357 * 010: prefer public address 358 * 100: prefer care-of address 359 */ 360 dontfrag:1; 361 __u8 min_hopcount; 362 __u8 tclass; 363 __u8 padding; 364 365 __u32 dst_cookie; 366 367 struct ipv6_mc_socklist *ipv6_mc_list; 368 struct ipv6_ac_socklist *ipv6_ac_list; 369 struct ipv6_fl_socklist *ipv6_fl_list; 370 371 struct ipv6_txoptions *opt; 372 struct sk_buff *pktoptions; 373 struct sk_buff *rxpmtu; 374 struct { 375 struct ipv6_txoptions *opt; 376 u8 hop_limit; 377 u8 tclass; 378 } cork; 379 }; 380 381 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ 382 struct raw6_sock { 383 /* inet_sock has to be the first member of raw6_sock */ 384 struct inet_sock inet; 385 __u32 checksum; /* perform checksum */ 386 __u32 offset; /* checksum offset */ 387 struct icmp6_filter filter; 388 __u32 ip6mr_table; 389 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ 390 struct ipv6_pinfo inet6; 391 }; 392 393 struct udp6_sock { 394 struct udp_sock udp; 395 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ 396 struct ipv6_pinfo inet6; 397 }; 398 399 struct tcp6_sock { 400 struct tcp_sock tcp; 401 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ 402 struct ipv6_pinfo inet6; 403 }; 404 405 extern int inet6_sk_rebuild_header(struct sock *sk); 406 407 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 408 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 409 { 410 return inet_sk(__sk)->pinet6; 411 } 412 413 static inline struct inet6_request_sock * 414 inet6_rsk(const struct request_sock *rsk) 415 { 416 return (struct inet6_request_sock *)(((u8 *)rsk) + 417 inet_rsk(rsk)->inet6_rsk_offset); 418 } 419 420 static inline u32 inet6_rsk_offset(struct request_sock *rsk) 421 { 422 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); 423 } 424 425 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) 426 { 427 struct request_sock *req = reqsk_alloc(ops); 428 429 if (req != NULL) { 430 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); 431 inet6_rsk(req)->pktopts = NULL; 432 } 433 434 return req; 435 } 436 437 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 438 { 439 return (struct raw6_sock *)sk; 440 } 441 442 static inline void inet_sk_copy_descendant(struct sock *sk_to, 443 const struct sock *sk_from) 444 { 445 int ancestor_size = sizeof(struct inet_sock); 446 447 if (sk_from->sk_family == PF_INET6) 448 ancestor_size += sizeof(struct ipv6_pinfo); 449 450 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); 451 } 452 453 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) 454 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) 455 456 struct inet6_timewait_sock { 457 struct in6_addr tw_v6_daddr; 458 struct in6_addr tw_v6_rcv_saddr; 459 }; 460 461 struct tcp6_timewait_sock { 462 struct tcp_timewait_sock tcp6tw_tcp; 463 struct inet6_timewait_sock tcp6tw_inet6; 464 }; 465 466 static inline u16 inet6_tw_offset(const struct proto *prot) 467 { 468 return prot->twsk_prot->twsk_obj_size - 469 sizeof(struct inet6_timewait_sock); 470 } 471 472 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) 473 { 474 return (struct inet6_timewait_sock *)(((u8 *)sk) + 475 inet_twsk(sk)->tw_ipv6_offset); 476 } 477 478 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) 479 { 480 return likely(sk->sk_state != TCP_TIME_WAIT) ? 481 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; 482 } 483 484 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) 485 { 486 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; 487 } 488 489 static inline int inet_v6_ipv6only(const struct sock *sk) 490 { 491 return likely(sk->sk_state != TCP_TIME_WAIT) ? 492 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; 493 } 494 #else 495 #define __ipv6_only_sock(sk) 0 496 #define ipv6_only_sock(sk) 0 497 498 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 499 { 500 return NULL; 501 } 502 503 static inline struct inet6_request_sock * 504 inet6_rsk(const struct request_sock *rsk) 505 { 506 return NULL; 507 } 508 509 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 510 { 511 return NULL; 512 } 513 514 #define __inet6_rcv_saddr(__sk) NULL 515 #define inet6_rcv_saddr(__sk) NULL 516 #define tcp_twsk_ipv6only(__sk) 0 517 #define inet_v6_ipv6only(__sk) 0 518 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ 519 520 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\ 521 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ 522 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \ 523 ((__sk)->sk_family == AF_INET6) && \ 524 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ 525 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ 526 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) 527 528 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \ 529 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ 530 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \ 531 ((__sk)->sk_family == PF_INET6) && \ 532 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \ 533 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \ 534 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) 535 536 #endif /* __KERNEL__ */ 537 538 #endif /* _IPV6_H */ 539
