| 1 | #ifndef _IPV6_H |
| 2 | #define _IPV6_H |
| 3 | |
| 4 | #include <uapi/linux/ipv6.h> |
| 5 | |
| 6 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
| 7 | #define ipv6_authlen(p) (((p)->hdrlen+2) << 2) |
| 8 | /* |
| 9 | * This structure contains configuration options per IPv6 link. |
| 10 | */ |
| 11 | struct ipv6_devconf { |
| 12 | __s32 forwarding; |
| 13 | __s32 hop_limit; |
| 14 | __s32 mtu6; |
| 15 | __s32 accept_ra; |
| 16 | __s32 accept_redirects; |
| 17 | __s32 autoconf; |
| 18 | __s32 dad_transmits; |
| 19 | __s32 rtr_solicits; |
| 20 | __s32 rtr_solicit_interval; |
| 21 | __s32 rtr_solicit_delay; |
| 22 | __s32 force_mld_version; |
| 23 | __s32 mldv1_unsolicited_report_interval; |
| 24 | __s32 mldv2_unsolicited_report_interval; |
| 25 | __s32 use_tempaddr; |
| 26 | __s32 temp_valid_lft; |
| 27 | __s32 temp_prefered_lft; |
| 28 | __s32 regen_max_retry; |
| 29 | __s32 max_desync_factor; |
| 30 | __s32 max_addresses; |
| 31 | __s32 accept_ra_defrtr; |
| 32 | __s32 accept_ra_min_hop_limit; |
| 33 | __s32 accept_ra_pinfo; |
| 34 | __s32 ignore_routes_with_linkdown; |
| 35 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 36 | __s32 accept_ra_rtr_pref; |
| 37 | __s32 rtr_probe_interval; |
| 38 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 39 | __s32 accept_ra_rt_info_max_plen; |
| 40 | #endif |
| 41 | #endif |
| 42 | __s32 proxy_ndp; |
| 43 | __s32 accept_source_route; |
| 44 | __s32 accept_ra_from_local; |
| 45 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 46 | __s32 optimistic_dad; |
| 47 | __s32 use_optimistic; |
| 48 | #endif |
| 49 | #ifdef CONFIG_IPV6_MROUTE |
| 50 | __s32 mc_forwarding; |
| 51 | #endif |
| 52 | __s32 disable_ipv6; |
| 53 | __s32 drop_unicast_in_l2_multicast; |
| 54 | __s32 accept_dad; |
| 55 | __s32 force_tllao; |
| 56 | __s32 ndisc_notify; |
| 57 | __s32 suppress_frag_ndisc; |
| 58 | __s32 accept_ra_mtu; |
| 59 | __s32 drop_unsolicited_na; |
| 60 | struct ipv6_stable_secret { |
| 61 | bool initialized; |
| 62 | struct in6_addr secret; |
| 63 | } stable_secret; |
| 64 | __s32 use_oif_addrs_only; |
| 65 | __s32 keep_addr_on_down; |
| 66 | |
| 67 | struct ctl_table_header *sysctl_header; |
| 68 | }; |
| 69 | |
| 70 | struct ipv6_params { |
| 71 | __s32 disable_ipv6; |
| 72 | __s32 autoconf; |
| 73 | }; |
| 74 | extern struct ipv6_params ipv6_defaults; |
| 75 | #include <linux/icmpv6.h> |
| 76 | #include <linux/tcp.h> |
| 77 | #include <linux/udp.h> |
| 78 | |
| 79 | #include <net/inet_sock.h> |
| 80 | |
| 81 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
| 82 | { |
| 83 | return (struct ipv6hdr *)skb_network_header(skb); |
| 84 | } |
| 85 | |
| 86 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
| 87 | { |
| 88 | return (struct ipv6hdr *)skb_inner_network_header(skb); |
| 89 | } |
| 90 | |
| 91 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
| 92 | { |
| 93 | return (struct ipv6hdr *)skb_transport_header(skb); |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | This structure contains results of exthdrs parsing |
| 98 | as offsets from skb->nh. |
| 99 | */ |
| 100 | |
| 101 | struct inet6_skb_parm { |
| 102 | int iif; |
| 103 | __be16 ra; |
| 104 | __u16 dst0; |
| 105 | __u16 srcrt; |
| 106 | __u16 dst1; |
| 107 | __u16 lastopt; |
| 108 | __u16 nhoff; |
| 109 | __u16 flags; |
| 110 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
| 111 | __u16 dsthao; |
| 112 | #endif |
| 113 | __u16 frag_max_size; |
| 114 | |
| 115 | #define IP6SKB_XFRM_TRANSFORMED 1 |
| 116 | #define IP6SKB_FORWARDED 2 |
| 117 | #define IP6SKB_REROUTED 4 |
| 118 | #define IP6SKB_ROUTERALERT 8 |
| 119 | #define IP6SKB_FRAGMENTED 16 |
| 120 | #define IP6SKB_HOPBYHOP 32 |
| 121 | #define IP6SKB_L3SLAVE 64 |
| 122 | }; |
| 123 | |
| 124 | #if defined(CONFIG_NET_L3_MASTER_DEV) |
| 125 | static inline bool skb_l3mdev_slave(__u16 flags) |
| 126 | { |
| 127 | return flags & IP6SKB_L3SLAVE; |
| 128 | } |
| 129 | #else |
| 130 | static inline bool skb_l3mdev_slave(__u16 flags) |
| 131 | { |
| 132 | return false; |
| 133 | } |
| 134 | #endif |
| 135 | |
| 136 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
| 137 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
| 138 | |
| 139 | static inline int inet6_iif(const struct sk_buff *skb) |
| 140 | { |
| 141 | bool l3_slave = skb_l3mdev_slave(IP6CB(skb)->flags); |
| 142 | |
| 143 | return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; |
| 144 | } |
| 145 | |
| 146 | struct tcp6_request_sock { |
| 147 | struct tcp_request_sock tcp6rsk_tcp; |
| 148 | }; |
| 149 | |
| 150 | struct ipv6_mc_socklist; |
| 151 | struct ipv6_ac_socklist; |
| 152 | struct ipv6_fl_socklist; |
| 153 | |
| 154 | struct inet6_cork { |
| 155 | struct ipv6_txoptions *opt; |
| 156 | u8 hop_limit; |
| 157 | u8 tclass; |
| 158 | }; |
| 159 | |
| 160 | /** |
| 161 | * struct ipv6_pinfo - ipv6 private area |
| 162 | * |
| 163 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) |
| 164 | * this _must_ be the last member, so that inet6_sk_generic |
| 165 | * is able to calculate its offset from the base struct sock |
| 166 | * by using the struct proto->slab_obj_size member. -acme |
| 167 | */ |
| 168 | struct ipv6_pinfo { |
| 169 | struct in6_addr saddr; |
| 170 | struct in6_pktinfo sticky_pktinfo; |
| 171 | const struct in6_addr *daddr_cache; |
| 172 | #ifdef CONFIG_IPV6_SUBTREES |
| 173 | const struct in6_addr *saddr_cache; |
| 174 | #endif |
| 175 | |
| 176 | __be32 flow_label; |
| 177 | __u32 frag_size; |
| 178 | |
| 179 | /* |
| 180 | * Packed in 16bits. |
| 181 | * Omit one shift by by putting the signed field at MSB. |
| 182 | */ |
| 183 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 184 | __s16 hop_limit:9; |
| 185 | __u16 __unused_1:7; |
| 186 | #else |
| 187 | __u16 __unused_1:7; |
| 188 | __s16 hop_limit:9; |
| 189 | #endif |
| 190 | |
| 191 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 192 | /* Packed in 16bits. */ |
| 193 | __s16 mcast_hops:9; |
| 194 | __u16 __unused_2:6, |
| 195 | mc_loop:1; |
| 196 | #else |
| 197 | __u16 mc_loop:1, |
| 198 | __unused_2:6; |
| 199 | __s16 mcast_hops:9; |
| 200 | #endif |
| 201 | int ucast_oif; |
| 202 | int mcast_oif; |
| 203 | |
| 204 | /* pktoption flags */ |
| 205 | union { |
| 206 | struct { |
| 207 | __u16 srcrt:1, |
| 208 | osrcrt:1, |
| 209 | rxinfo:1, |
| 210 | rxoinfo:1, |
| 211 | rxhlim:1, |
| 212 | rxohlim:1, |
| 213 | hopopts:1, |
| 214 | ohopopts:1, |
| 215 | dstopts:1, |
| 216 | odstopts:1, |
| 217 | rxflow:1, |
| 218 | rxtclass:1, |
| 219 | rxpmtu:1, |
| 220 | rxorigdstaddr:1; |
| 221 | /* 2 bits hole */ |
| 222 | } bits; |
| 223 | __u16 all; |
| 224 | } rxopt; |
| 225 | |
| 226 | /* sockopt flags */ |
| 227 | __u16 recverr:1, |
| 228 | sndflow:1, |
| 229 | repflow:1, |
| 230 | pmtudisc:3, |
| 231 | padding:1, /* 1 bit hole */ |
| 232 | srcprefs:3, /* 001: prefer temporary address |
| 233 | * 010: prefer public address |
| 234 | * 100: prefer care-of address |
| 235 | */ |
| 236 | dontfrag:1, |
| 237 | autoflowlabel:1; |
| 238 | __u8 min_hopcount; |
| 239 | __u8 tclass; |
| 240 | __be32 rcv_flowinfo; |
| 241 | |
| 242 | __u32 dst_cookie; |
| 243 | __u32 rx_dst_cookie; |
| 244 | |
| 245 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
| 246 | struct ipv6_ac_socklist *ipv6_ac_list; |
| 247 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
| 248 | |
| 249 | struct ipv6_txoptions __rcu *opt; |
| 250 | struct sk_buff *pktoptions; |
| 251 | struct sk_buff *rxpmtu; |
| 252 | struct inet6_cork cork; |
| 253 | }; |
| 254 | |
| 255 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
| 256 | struct raw6_sock { |
| 257 | /* inet_sock has to be the first member of raw6_sock */ |
| 258 | struct inet_sock inet; |
| 259 | __u32 checksum; /* perform checksum */ |
| 260 | __u32 offset; /* checksum offset */ |
| 261 | struct icmp6_filter filter; |
| 262 | __u32 ip6mr_table; |
| 263 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
| 264 | struct ipv6_pinfo inet6; |
| 265 | }; |
| 266 | |
| 267 | struct udp6_sock { |
| 268 | struct udp_sock udp; |
| 269 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ |
| 270 | struct ipv6_pinfo inet6; |
| 271 | }; |
| 272 | |
| 273 | struct tcp6_sock { |
| 274 | struct tcp_sock tcp; |
| 275 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ |
| 276 | struct ipv6_pinfo inet6; |
| 277 | }; |
| 278 | |
| 279 | extern int inet6_sk_rebuild_header(struct sock *sk); |
| 280 | |
| 281 | struct tcp6_timewait_sock { |
| 282 | struct tcp_timewait_sock tcp6tw_tcp; |
| 283 | }; |
| 284 | |
| 285 | #if IS_ENABLED(CONFIG_IPV6) |
| 286 | static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) |
| 287 | { |
| 288 | return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; |
| 289 | } |
| 290 | |
| 291 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| 292 | { |
| 293 | return (struct raw6_sock *)sk; |
| 294 | } |
| 295 | |
| 296 | static inline void inet_sk_copy_descendant(struct sock *sk_to, |
| 297 | const struct sock *sk_from) |
| 298 | { |
| 299 | int ancestor_size = sizeof(struct inet_sock); |
| 300 | |
| 301 | if (sk_from->sk_family == PF_INET6) |
| 302 | ancestor_size += sizeof(struct ipv6_pinfo); |
| 303 | |
| 304 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); |
| 305 | } |
| 306 | |
| 307 | #define __ipv6_only_sock(sk) (sk->sk_ipv6only) |
| 308 | #define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) |
| 309 | #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ |
| 310 | inet6_sk(sk)->rxopt.bits.rxinfo) |
| 311 | |
| 312 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
| 313 | { |
| 314 | if (sk->sk_family == AF_INET6) |
| 315 | return &sk->sk_v6_rcv_saddr; |
| 316 | return NULL; |
| 317 | } |
| 318 | |
| 319 | static inline int inet_v6_ipv6only(const struct sock *sk) |
| 320 | { |
| 321 | /* ipv6only field is at same position for timewait and other sockets */ |
| 322 | return ipv6_only_sock(sk); |
| 323 | } |
| 324 | #else |
| 325 | #define __ipv6_only_sock(sk) 0 |
| 326 | #define ipv6_only_sock(sk) 0 |
| 327 | #define ipv6_sk_rxinfo(sk) 0 |
| 328 | |
| 329 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
| 330 | { |
| 331 | return NULL; |
| 332 | } |
| 333 | |
| 334 | static inline struct inet6_request_sock * |
| 335 | inet6_rsk(const struct request_sock *rsk) |
| 336 | { |
| 337 | return NULL; |
| 338 | } |
| 339 | |
| 340 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| 341 | { |
| 342 | return NULL; |
| 343 | } |
| 344 | |
| 345 | #define inet6_rcv_saddr(__sk) NULL |
| 346 | #define tcp_twsk_ipv6only(__sk) 0 |
| 347 | #define inet_v6_ipv6only(__sk) 0 |
| 348 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 349 | #endif /* _IPV6_H */ |