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; 71 __u32 bitmap; /* strict/loose bit map */ 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; 192 }; 193 194 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) 195 196 struct tcp6_request_sock { 197 struct tcp_request_sock req; 198 struct in6_addr loc_addr; 199 struct in6_addr rmt_addr; 200 struct sk_buff *pktopts; 201 int iif; 202 }; 203 204 static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk) 205 { 206 return (struct tcp6_request_sock *)sk; 207 } 208 209 /** 210 * struct ipv6_pinfo - ipv6 private area 211 * 212 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) 213 * this _must_ be the last member, so that inet6_sk_generic 214 * is able to calculate its offset from the base struct sock 215 * by using the struct proto->slab_obj_size member. -acme 216 */ 217 struct ipv6_pinfo { 218 struct in6_addr saddr; 219 struct in6_addr rcv_saddr; 220 struct in6_addr daddr; 221 struct in6_addr *daddr_cache; 222 223 __u32 flow_label; 224 __u32 frag_size; 225 __s16 hop_limit; 226 __s16 mcast_hops; 227 int mcast_oif; 228 229 /* pktoption flags */ 230 union { 231 struct { 232 __u8 srcrt:2, 233 rxinfo:1, 234 rxhlim:1, 235 hopopts:1, 236 dstopts:1, 237 rxflow:1; 238 } bits; 239 __u8 all; 240 } rxopt; 241 242 /* sockopt flags */ 243 __u8 mc_loop:1, 244 recverr:1, 245 sndflow:1, 246 pmtudisc:2, 247 ipv6only:1; 248 249 __u32 dst_cookie; 250 251 struct ipv6_mc_socklist *ipv6_mc_list; 252 struct ipv6_ac_socklist *ipv6_ac_list; 253 struct ipv6_fl_socklist *ipv6_fl_list; 254 255 struct ipv6_txoptions *opt; 256 struct sk_buff *pktoptions; 257 struct { 258 struct ipv6_txoptions *opt; 259 struct rt6_info *rt; 260 int hop_limit; 261 } cork; 262 }; 263 264 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ 265 struct raw6_sock { 266 /* inet_sock has to be the first member of raw6_sock */ 267 struct inet_sock inet; 268 __u32 checksum; /* perform checksum */ 269 __u32 offset; /* checksum offset */ 270 struct icmp6_filter filter; 271 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ 272 struct ipv6_pinfo inet6; 273 }; 274 275 struct udp6_sock { 276 struct udp_sock udp; 277 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ 278 struct ipv6_pinfo inet6; 279 }; 280 281 struct tcp6_sock { 282 struct tcp_sock tcp; 283 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ 284 struct ipv6_pinfo inet6; 285 }; 286 287 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 288 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 289 { 290 return inet_sk(__sk)->pinet6; 291 } 292 293 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 294 { 295 return (struct raw6_sock *)sk; 296 } 297 298 static inline void inet_sk_copy_descendant(struct sock *sk_to, 299 const struct sock *sk_from) 300 { 301 int ancestor_size = sizeof(struct inet_sock); 302 303 if (sk_from->sk_family == PF_INET6) 304 ancestor_size += sizeof(struct ipv6_pinfo); 305 306 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); 307 } 308 309 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) 310 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) 311 #else 312 #define __ipv6_only_sock(sk) 0 313 #define ipv6_only_sock(sk) 0 314 315 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) 316 { 317 return NULL; 318 } 319 320 static inline struct raw6_sock *raw6_sk(const struct sock *sk) 321 { 322 return NULL; 323 } 324 325 #endif 326 327 #endif 328 329 #endif 330