1 #ifndef _IPV6_H 2 #define _IPV6_H 3 4 #include <linux/in6.h> 5 #include <asm/byteorder.h> 6 7 /* The latest drafts declared increase in minimal mtu up to 1280. */ 8 9 #define IPV6_MIN_MTU 1280 10 11 /* 12 * Advanced API 13 * source interface/address selection, source routing, etc... 14 * *under construction* 15 */ 16 17 18 struct in6_pktinfo { 19 struct in6_addr ipi6_addr; 20 int ipi6_ifindex; 21 }; 22 23 24 struct in6_ifreq { 25 struct in6_addr ifr6_addr; 26 __u32 ifr6_prefixlen; 27 int ifr6_ifindex; 28 }; 29 30 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ 31 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ 32 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ 33 34 /* 35 * routing header 36 */ 37 struct ipv6_rt_hdr { 38 __u8 nexthdr; 39 __u8 hdrlen; 40 __u8 type; 41 __u8 segments_left; 42 43 /* 44 * type specific data 45 * variable length field 46 */ 47 }; 48 49 50 struct ipv6_opt_hdr { 51 __u8 nexthdr; 52 __u8 hdrlen; 53 /* 54 * TLV encoded option data follows. 55 */ 56 }; 57 58 #define ipv6_destopt_hdr ipv6_opt_hdr 59 #define ipv6_hopopt_hdr ipv6_opt_hdr 60 61 #ifdef __KERNEL__ 62 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) 63 #endif 64 65 /* 66 * routing header type 0 (used in cmsghdr struct) 67 */ 68 69 struct rt0_hdr { 70 struct ipv6_rt_hdr rt_hdr; 71 __u32 reserved; 72 struct in6_addr addr[0]; 73 74 #define rt0_type rt_hdr.type 75 }; 76 77 /* 78 * routing header type 2 79 */ 80 81 struct rt2_hdr { 82 struct ipv6_rt_hdr rt_hdr; 83 __u32 reserved; 84 struct in6_addr addr; 85 86 #define rt2_type rt_hdr.type 87 }; 88 89 /* 90 * home address option in destination options header 91 */ 92 93 struct ipv6_destopt_hao { 94 __u8 type; 95 __u8 length; 96 struct in6_addr addr; 97 } __attribute__ ((__packed__)); 98 99 /* 100 * IPv6 fixed header 101 * 102 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 103 * are glued to priority now, forming "class". 104 */ 105 106 struct ipv6hdr { 107 #if defined(__LITTLE_ENDIAN_BITFIELD) 108 __u8 priority:4, 109 version:4; 110 #elif defined(__BIG_ENDIAN_BITFIELD) 111 __u8 version:4, 112 priority:4; 113 #else 114 #error "Please fix <asm/byteorder.h>" 115 #endif 116 __u8 flow_lbl[3]; 117 118 __be16 payload_len; 119 __u8 nexthdr; 120 __u8 hop_limit; 121 122 struct in6_addr saddr; 123 struct in6_addr daddr; 124 }; 125 126 /* 127 * This structure contains configuration options per IPv6 link. 128 */ 129 struct ipv6_devconf { 130 __s32 forwarding; 131 __s32 hop_limit; 132 __s32 mtu6; 133 __s32 accept_ra; 134 __s32 accept_redirects; 135 __s32 autoconf; 136 __s32 dad_transmits; 137 __s32 rtr_solicits; 138 __s32 rtr_solicit_interval; 139 __s32 rtr_solicit_delay; 140 __s32 force_mld_version; 141 #ifdef CONFIG_IPV6_PRIVACY 142 __s32 use_tempaddr; 143 __s32 temp_valid_lft; 144 __s32 temp_prefered_lft; 145 __s32 regen_max_retry; 146 __s32 max_desync_factor; 147 #endif 148 __s32 max_addresses; 149 __s32 accept_ra_defrtr; 150 __s32 accept_ra_pinfo; 151 #ifdef CONFIG_IPV6_ROUTER_PREF 152 __s32 accept_ra_rtr_pref; 153 __s32 rtr_probe_interval; 154 #ifdef CONFIG_IPV6_ROUTE_INFO 155 __s32 accept_ra_rt_info_max_plen; 156 #endif 157 #endif 158 __s32 proxy_ndp; 159 __s32 accept_source_route; 160 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 161 __s32 optimistic_dad; 162 #endif 163 void *sysctl; 164 }; 165 166 /* index values for the variables in ipv6_devconf */ 167 enum { 168 DEVCONF_FORWARDING = 0, 169 DEVCONF_HOPLIMIT, 170 DEVCONF_MTU6, 171 DEVCONF_ACCEPT_RA, 172 DEVCONF_ACCEPT_REDIRECTS, 173 DEVCONF_AUTOCONF, 174 DEVCONF_DAD_TRANSMITS, 175 DEVCONF_RTR_SOLICITS, 176 DEVCONF_RTR_SOLICIT_INTERVAL, 177 DEVCONF_RTR_SOLICIT_DELAY, 178 DEVCONF_USE_TEMPADDR, 179 DEVCONF_TEMP_VALID_LFT, 180 DEVCONF_TEMP_PREFERED_LFT, 181 DEVCONF_REGEN_MAX_RETRY, 182 DEVCONF_MAX_DESYNC_FACTOR, 183 DEVCONF_MAX_ADDRESSES, 184 DEVCONF_FORCE_MLD_VERSION, 185 DEVCONF_ACCEPT_RA_DEFRTR, 186 DEVCONF_ACCEPT_RA_PINFO, 187 DEVCONF_ACCEPT_RA_RTR_PREF, 188 DEVCONF_RTR_PROBE_INTERVAL, 189 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 190 DEVCONF_PROXY_NDP, 191 DEVCONF_OPTIMISTIC_DAD, 192 DEVCONF_ACCEPT_SOURCE_ROUTE, 193 DEVCONF_MAX 194 }; 195 196 #ifdef __KERNEL__ 197 #include <linux/icmpv6.h> 198 #include <linux/tcp.h> 199 #include <linux/udp.h> 200 201 #include <net/inet_sock.h> 202 203 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) 204 { 205 return (struct ipv6hdr *)skb_network_header(skb); 206 } 207 208 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) 209 { 210 return (struct ipv6hdr *)skb_transport_header(skb); 211 } 212 213 /* 214 This structure contains results of exthdrs parsing 215 as offsets from skb->nh. 216 */ 217 218 struct inet6_skb_parm { 219 int iif; 220 __u16 ra; 221 __u16 hop; 222 __u16 dst0; 223 __u16 srcrt; 224 __u16 dst1; 225 __u16 lastopt; 226 __u32 nhoff; 227 __u16 flags; 228 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 229 __u16 dsthao; 230 #endif 231 232 #define IP6SKB_XFRM_TRANSFORMED 1 233 }; 234 235 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) 236 237 static inline int inet6_iif(const struct sk_buff *skb) 238 { 239 return IP6CB(skb)->iif; 240 } 241 242 struct inet6_request_sock { 243 struct in6_addr loc_addr; 244 struct in6_addr rmt_addr; 245 struct sk_buff *pktopts; 246 int iif; 247 }; 248 249 struct tcp6_request_sock { 250 struct tcp_request_sock tcp6rsk_tcp; 251 struct inet6_request_sock tcp6rsk_inet6; 252 }; 253 254 struct ipv6_mc_socklist; 255 struct ipv6_ac_socklist; 256 struct ipv6_fl_socklist; 257 258 /** 259 * struct ipv6_pinfo - ipv6 private area 260 * 261 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) 262 * this _must_ be the last member, so that inet6_sk_generic 263 * is able to calculate its offset from the base struct sock 264 * by using the struct proto->slab_obj_size member. -acme 265 */ 266 struct ipv6_pinfo { 267 struct in6_addr saddr; 268 struct in6_addr rcv_saddr; 269 struct in6_addr daddr; 270 struct in6_addr *daddr_cache; 271 #ifdef CONFIG_IPV6_SUBTREES 272 struct in6_addr *saddr_cache; 273 #endif 274 275 __be32 flow_label; 276 __u32 frag_size; 277 __s16 hop_limit; 278 __s16 mcast_hops; 279 int mcast_oif; 280 281 /* pktoption flags */ 282 union { 283 struct { 284 __u16 srcrt:1, 285 osrcrt:1, 286 rxinfo:1, 287 rxoinfo:1, 288 rxhlim:1, 289 rxohlim:1, 290 hopopts:1, 291 ohopopts:1, 292 dstopts:1, 293 odstopts:1, 294 rxflow:1, 295 rxtclass:1; 296 } bits; 297 __u16 all; 298 } rxopt; 299 300 /* sockopt flags */ 301 __u8 mc_loop:1, 302 recverr:1, 303 sndflow:1, 304 pmtudisc:2, 305 ipv6only:1; 306 __u8 tclass; 307 308 __u32 dst_cookie; 309 310 struct ipv6_mc_socklist *ipv6_mc_list; 311 struct ipv6_ac_socklist *ipv6_ac_list; 312 struct ipv6_fl_socklist *ipv6_fl_list; 313 314 struct ipv6_txoptions *opt; 315 struct sk_buff *pktoptions; 316 struct { 317 struct ipv6_txoptions *opt; 318 struct rt6_info *rt; 319 int hop_limit; 320 int tclass; 321 } cork; 322 }; 323 324 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ 325 struct raw6_sock { 326 /* inet_sock has to be the first member of raw6_sock */ 327 struct inet_sock inet; 328 __u32 checksum; /* perform checksum */ 329 __u32 offset; /* checksum offset */ 330 struct icmp6_filter filter; 331 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ 332 struct ipv6_pinfo inet6; 333 }; 334 335 struct udp6_sock { 336 struct udp_sock udp; 337 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ 338 struct ipv6_pinfo inet6; 339 }; 340 341 struct tcp6_sock { 342 struct tcp_sock tcp; 343 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ 344 struct ipv6_pinfo inet6; 345 }; 346 347 extern int inet6_sk_rebuild_header(struct sock *sk); 348 349 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 350 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 351 { 352 return inet_sk(__sk)->pinet6; 353 } 354 355 static inline struct inet6_request_sock * 356 inet6_rsk(const struct request_sock *rsk) 357 { 358 return (struct inet6_request_sock *)(((u8 *)rsk) + 359 inet_rsk(rsk)->inet6_rsk_offset); 360 } 361 362 static inline u32 inet6_rsk_offset(struct request_sock *rsk) 363 { 364 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); 365 } 366 367 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) 368 { 369 struct request_sock *req = reqsk_alloc(ops); 370 371 if (req != NULL) 372 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); 373 374 return req; 375 } 376 377 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 378 { 379 return (struct raw6_sock *)sk; 380 } 381 382 static inline void inet_sk_copy_descendant(struct sock *sk_to, 383 const struct sock *sk_from) 384 { 385 int ancestor_size = sizeof(struct inet_sock); 386 387 if (sk_from->sk_family == PF_INET6) 388 ancestor_size += sizeof(struct ipv6_pinfo); 389 390 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); 391 } 392 393 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) 394 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) 395 396 struct inet6_timewait_sock { 397 struct in6_addr tw_v6_daddr; 398 struct in6_addr tw_v6_rcv_saddr; 399 }; 400 401 struct tcp6_timewait_sock { 402 struct tcp_timewait_sock tcp6tw_tcp; 403 struct inet6_timewait_sock tcp6tw_inet6; 404 }; 405 406 static inline u16 inet6_tw_offset(const struct proto *prot) 407 { 408 return prot->twsk_prot->twsk_obj_size - 409 sizeof(struct inet6_timewait_sock); 410 } 411 412 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) 413 { 414 return (struct inet6_timewait_sock *)(((u8 *)sk) + 415 inet_twsk(sk)->tw_ipv6_offset); 416 } 417 418 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) 419 { 420 return likely(sk->sk_state != TCP_TIME_WAIT) ? 421 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; 422 } 423 424 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) 425 { 426 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; 427 } 428 429 static inline int inet_v6_ipv6only(const struct sock *sk) 430 { 431 return likely(sk->sk_state != TCP_TIME_WAIT) ? 432 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; 433 } 434 #else 435 #define __ipv6_only_sock(sk) 0 436 #define ipv6_only_sock(sk) 0 437 438 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 439 { 440 return NULL; 441 } 442 443 static inline struct inet6_request_sock * 444 inet6_rsk(const struct request_sock *rsk) 445 { 446 return NULL; 447 } 448 449 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 450 { 451 return NULL; 452 } 453 454 #define __inet6_rcv_saddr(__sk) NULL 455 #define inet6_rcv_saddr(__sk) NULL 456 #define tcp_twsk_ipv6only(__sk) 0 457 #define inet_v6_ipv6only(__sk) 0 458 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ 459 460 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\ 461 (((__sk)->sk_hash == (__hash)) && \ 462 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \ 463 ((__sk)->sk_family == AF_INET6) && \ 464 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ 465 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ 466 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) 467 468 #endif /* __KERNEL__ */ 469 470 #endif /* _IPV6_H */ 471