Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _IPV6_H |
| 2 | #define _IPV6_H |
| 3 | |
| 4 | #include <linux/config.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 | |
| 25 | struct in6_ifreq { |
| 26 | struct in6_addr ifr6_addr; |
| 27 | __u32 ifr6_prefixlen; |
| 28 | int ifr6_ifindex; |
| 29 | }; |
| 30 | |
| 31 | #define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */ |
| 32 | #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 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; |
Brian Haley | e6df439 | 2005-09-10 00:15:06 -0700 | [diff] [blame] | 71 | __u32 reserved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | struct in6_addr addr[0]; |
| 73 | |
| 74 | #define rt0_type rt_hdr.type |
| 75 | }; |
| 76 | |
| 77 | struct ipv6_auth_hdr { |
| 78 | __u8 nexthdr; |
| 79 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
| 80 | __u16 reserved; |
| 81 | __u32 spi; |
| 82 | __u32 seq_no; /* Sequence number */ |
| 83 | __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */ |
| 84 | }; |
| 85 | |
| 86 | struct ipv6_esp_hdr { |
| 87 | __u32 spi; |
| 88 | __u32 seq_no; /* Sequence number */ |
| 89 | __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */ |
| 90 | }; |
| 91 | |
| 92 | struct ipv6_comp_hdr { |
| 93 | __u8 nexthdr; |
| 94 | __u8 flags; |
| 95 | __u16 cpi; |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * IPv6 fixed header |
| 100 | * |
| 101 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl |
| 102 | * are glued to priority now, forming "class". |
| 103 | */ |
| 104 | |
| 105 | struct ipv6hdr { |
| 106 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 107 | __u8 priority:4, |
| 108 | version:4; |
| 109 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 110 | __u8 version:4, |
| 111 | priority:4; |
| 112 | #else |
| 113 | #error "Please fix <asm/byteorder.h>" |
| 114 | #endif |
| 115 | __u8 flow_lbl[3]; |
| 116 | |
| 117 | __u16 payload_len; |
| 118 | __u8 nexthdr; |
| 119 | __u8 hop_limit; |
| 120 | |
| 121 | struct in6_addr saddr; |
| 122 | struct in6_addr daddr; |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * This structure contains configuration options per IPv6 link. |
| 127 | */ |
| 128 | struct ipv6_devconf { |
| 129 | __s32 forwarding; |
| 130 | __s32 hop_limit; |
| 131 | __s32 mtu6; |
| 132 | __s32 accept_ra; |
| 133 | __s32 accept_redirects; |
| 134 | __s32 autoconf; |
| 135 | __s32 dad_transmits; |
| 136 | __s32 rtr_solicits; |
| 137 | __s32 rtr_solicit_interval; |
| 138 | __s32 rtr_solicit_delay; |
| 139 | __s32 force_mld_version; |
| 140 | #ifdef CONFIG_IPV6_PRIVACY |
| 141 | __s32 use_tempaddr; |
| 142 | __s32 temp_valid_lft; |
| 143 | __s32 temp_prefered_lft; |
| 144 | __s32 regen_max_retry; |
| 145 | __s32 max_desync_factor; |
| 146 | #endif |
| 147 | __s32 max_addresses; |
| 148 | void *sysctl; |
| 149 | }; |
| 150 | |
| 151 | /* index values for the variables in ipv6_devconf */ |
| 152 | enum { |
| 153 | DEVCONF_FORWARDING = 0, |
| 154 | DEVCONF_HOPLIMIT, |
| 155 | DEVCONF_MTU6, |
| 156 | DEVCONF_ACCEPT_RA, |
| 157 | DEVCONF_ACCEPT_REDIRECTS, |
| 158 | DEVCONF_AUTOCONF, |
| 159 | DEVCONF_DAD_TRANSMITS, |
| 160 | DEVCONF_RTR_SOLICITS, |
| 161 | DEVCONF_RTR_SOLICIT_INTERVAL, |
| 162 | DEVCONF_RTR_SOLICIT_DELAY, |
| 163 | DEVCONF_USE_TEMPADDR, |
| 164 | DEVCONF_TEMP_VALID_LFT, |
| 165 | DEVCONF_TEMP_PREFERED_LFT, |
| 166 | DEVCONF_REGEN_MAX_RETRY, |
| 167 | DEVCONF_MAX_DESYNC_FACTOR, |
| 168 | DEVCONF_MAX_ADDRESSES, |
| 169 | DEVCONF_FORCE_MLD_VERSION, |
| 170 | DEVCONF_MAX |
| 171 | }; |
| 172 | |
| 173 | #ifdef __KERNEL__ |
| 174 | #include <linux/in6.h> /* struct sockaddr_in6 */ |
| 175 | #include <linux/icmpv6.h> |
| 176 | #include <net/if_inet6.h> /* struct ipv6_mc_socklist */ |
| 177 | #include <linux/tcp.h> |
| 178 | #include <linux/udp.h> |
| 179 | |
| 180 | /* |
| 181 | This structure contains results of exthdrs parsing |
| 182 | as offsets from skb->nh. |
| 183 | */ |
| 184 | |
| 185 | struct inet6_skb_parm { |
| 186 | int iif; |
| 187 | __u16 ra; |
| 188 | __u16 hop; |
| 189 | __u16 dst0; |
| 190 | __u16 srcrt; |
| 191 | __u16 dst1; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 192 | __u16 lastopt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
| 195 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
| 196 | |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 197 | static inline int inet6_iif(const struct sk_buff *skb) |
| 198 | { |
| 199 | return IP6CB(skb)->iif; |
| 200 | } |
| 201 | |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 202 | struct tcp6_request_sock { |
| 203 | struct tcp_request_sock req; |
| 204 | struct in6_addr loc_addr; |
| 205 | struct in6_addr rmt_addr; |
| 206 | struct sk_buff *pktopts; |
| 207 | int iif; |
| 208 | }; |
| 209 | |
Arnaldo Carvalho de Melo | 60236fd | 2005-06-18 22:47:21 -0700 | [diff] [blame] | 210 | static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk) |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 211 | { |
| 212 | return (struct tcp6_request_sock *)sk; |
| 213 | } |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | /** |
| 216 | * struct ipv6_pinfo - ipv6 private area |
| 217 | * |
| 218 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) |
| 219 | * this _must_ be the last member, so that inet6_sk_generic |
| 220 | * is able to calculate its offset from the base struct sock |
| 221 | * by using the struct proto->slab_obj_size member. -acme |
| 222 | */ |
| 223 | struct ipv6_pinfo { |
| 224 | struct in6_addr saddr; |
| 225 | struct in6_addr rcv_saddr; |
| 226 | struct in6_addr daddr; |
| 227 | struct in6_addr *daddr_cache; |
| 228 | |
| 229 | __u32 flow_label; |
| 230 | __u32 frag_size; |
| 231 | __s16 hop_limit; |
| 232 | __s16 mcast_hops; |
| 233 | int mcast_oif; |
| 234 | |
| 235 | /* pktoption flags */ |
| 236 | union { |
| 237 | struct { |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 238 | __u16 srcrt:2, |
| 239 | osrcrt:2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | rxinfo:1, |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 241 | rxoinfo:1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | rxhlim:1, |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 243 | rxohlim:1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | hopopts:1, |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 245 | ohopopts:1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | dstopts:1, |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 247 | odstopts:1, |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 248 | rxflow:1, |
| 249 | rxtclass:1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } bits; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 251 | __u16 all; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } rxopt; |
| 253 | |
| 254 | /* sockopt flags */ |
| 255 | __u8 mc_loop:1, |
| 256 | recverr:1, |
| 257 | sndflow:1, |
| 258 | pmtudisc:2, |
| 259 | ipv6only:1; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 260 | __u8 tclass; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | __u32 dst_cookie; |
| 263 | |
| 264 | struct ipv6_mc_socklist *ipv6_mc_list; |
| 265 | struct ipv6_ac_socklist *ipv6_ac_list; |
| 266 | struct ipv6_fl_socklist *ipv6_fl_list; |
| 267 | |
| 268 | struct ipv6_txoptions *opt; |
| 269 | struct sk_buff *pktoptions; |
| 270 | struct { |
| 271 | struct ipv6_txoptions *opt; |
| 272 | struct rt6_info *rt; |
| 273 | int hop_limit; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 274 | int tclass; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } cork; |
| 276 | }; |
| 277 | |
| 278 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
| 279 | struct raw6_sock { |
| 280 | /* inet_sock has to be the first member of raw6_sock */ |
| 281 | struct inet_sock inet; |
| 282 | __u32 checksum; /* perform checksum */ |
| 283 | __u32 offset; /* checksum offset */ |
| 284 | struct icmp6_filter filter; |
| 285 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
| 286 | struct ipv6_pinfo inet6; |
| 287 | }; |
| 288 | |
| 289 | struct udp6_sock { |
| 290 | struct udp_sock udp; |
| 291 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ |
| 292 | struct ipv6_pinfo inet6; |
| 293 | }; |
| 294 | |
| 295 | struct tcp6_sock { |
| 296 | struct tcp_sock tcp; |
| 297 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ |
| 298 | struct ipv6_pinfo inet6; |
| 299 | }; |
| 300 | |
| 301 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 302 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
| 303 | { |
| 304 | return inet_sk(__sk)->pinet6; |
| 305 | } |
| 306 | |
| 307 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| 308 | { |
| 309 | return (struct raw6_sock *)sk; |
| 310 | } |
| 311 | |
| 312 | static inline void inet_sk_copy_descendant(struct sock *sk_to, |
| 313 | const struct sock *sk_from) |
| 314 | { |
| 315 | int ancestor_size = sizeof(struct inet_sock); |
| 316 | |
| 317 | if (sk_from->sk_family == PF_INET6) |
| 318 | ancestor_size += sizeof(struct ipv6_pinfo); |
| 319 | |
| 320 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); |
| 321 | } |
| 322 | |
| 323 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) |
| 324 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 325 | |
| 326 | #include <linux/tcp.h> |
| 327 | |
| 328 | struct tcp6_timewait_sock { |
| 329 | struct tcp_timewait_sock tw_v6_sk; |
| 330 | struct in6_addr tw_v6_daddr; |
| 331 | struct in6_addr tw_v6_rcv_saddr; |
| 332 | }; |
| 333 | |
| 334 | static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk) |
| 335 | { |
| 336 | return (struct tcp6_timewait_sock *)sk; |
| 337 | } |
| 338 | |
| 339 | static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk) |
| 340 | { |
| 341 | return likely(sk->sk_state != TCP_TIME_WAIT) ? |
| 342 | &inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr; |
| 343 | } |
| 344 | |
| 345 | static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk) |
| 346 | { |
| 347 | return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL; |
| 348 | } |
| 349 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 350 | static inline int inet_v6_ipv6only(const struct sock *sk) |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 351 | { |
| 352 | return likely(sk->sk_state != TCP_TIME_WAIT) ? |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 353 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | #else |
| 356 | #define __ipv6_only_sock(sk) 0 |
| 357 | #define ipv6_only_sock(sk) 0 |
| 358 | |
| 359 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
| 360 | { |
| 361 | return NULL; |
| 362 | } |
| 363 | |
| 364 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| 365 | { |
| 366 | return NULL; |
| 367 | } |
| 368 | |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 369 | #define __tcp_v6_rcv_saddr(__sk) NULL |
| 370 | #define tcp_v6_rcv_saddr(__sk) NULL |
| 371 | #define tcp_twsk_ipv6only(__sk) 0 |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 372 | #define inet_v6_ipv6only(__sk) 0 |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 373 | #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 375 | #define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \ |
| 376 | (((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \ |
| 377 | ((__sk)->sk_family == AF_INET6) && \ |
| 378 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ |
| 379 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ |
| 380 | (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Arnaldo Carvalho de Melo | 8feaf0c0 | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 382 | #endif /* __KERNEL__ */ |
| 383 | |
| 384 | #endif /* _IPV6_H */ |