| #ifndef _IPV6_H |
| #define _IPV6_H |
| |
| #include <linux/in6.h> |
| #include <asm/byteorder.h> |
| |
| /* The latest drafts declared increase in minimal mtu up to 1280. */ |
| |
| #define IPV6_MIN_MTU 1280 |
| |
| /* |
| * Advanced API |
| * source interface/address selection, source routing, etc... |
| * *under construction* |
| */ |
| |
| |
| struct in6_pktinfo { |
| struct in6_addr ipi6_addr; |
| int ipi6_ifindex; |
| }; |
| |
| |
| struct in6_ifreq { |
| struct in6_addr ifr6_addr; |
| __u32 ifr6_prefixlen; |
| int ifr6_ifindex; |
| }; |
| |
| #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ |
| #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ |
| #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ |
| |
| /* |
| * routing header |
| */ |
| struct ipv6_rt_hdr { |
| __u8 nexthdr; |
| __u8 hdrlen; |
| __u8 type; |
| __u8 segments_left; |
| |
| /* |
| * type specific data |
| * variable length field |
| */ |
| }; |
| |
| |
| struct ipv6_opt_hdr { |
| __u8 nexthdr; |
| __u8 hdrlen; |
| /* |
| * TLV encoded option data follows. |
| */ |
| }; |
| |
| #define ipv6_destopt_hdr ipv6_opt_hdr |
| #define ipv6_hopopt_hdr ipv6_opt_hdr |
| |
| #ifdef __KERNEL__ |
| #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
| #endif |
| |
| /* |
| * routing header type 0 (used in cmsghdr struct) |
| */ |
| |
| struct rt0_hdr { |
| struct ipv6_rt_hdr rt_hdr; |
| __u32 reserved; |
| struct in6_addr addr[0]; |
| |
| #define rt0_type rt_hdr.type |
| }; |
| |
| /* |
| * routing header type 2 |
| */ |
| |
| struct rt2_hdr { |
| struct ipv6_rt_hdr rt_hdr; |
| __u32 reserved; |
| struct in6_addr addr; |
| |
| #define rt2_type rt_hdr.type |
| }; |
| |
| /* |
| * home address option in destination options header |
| */ |
| |
| struct ipv6_destopt_hao { |
| __u8 type; |
| __u8 length; |
| struct in6_addr addr; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * IPv6 fixed header |
| * |
| * BEWARE, it is incorrect. The first 4 bits of flow_lbl |
| * are glued to priority now, forming "class". |
| */ |
| |
| struct ipv6hdr { |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| __u8 priority:4, |
| version:4; |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| __u8 version:4, |
| priority:4; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| __u8 flow_lbl[3]; |
| |
| __be16 payload_len; |
| __u8 nexthdr; |
| __u8 hop_limit; |
| |
| struct in6_addr saddr; |
| struct in6_addr daddr; |
| }; |
| |
| /* |
| * This structure contains configuration options per IPv6 link. |
| */ |
| struct ipv6_devconf { |
| __s32 forwarding; |
| __s32 hop_limit; |
| __s32 mtu6; |
| __s32 accept_ra; |
| __s32 accept_redirects; |
| __s32 autoconf; |
| __s32 dad_transmits; |
| __s32 rtr_solicits; |
| __s32 rtr_solicit_interval; |
| __s32 rtr_solicit_delay; |
| __s32 force_mld_version; |
| #ifdef CONFIG_IPV6_PRIVACY |
| __s32 use_tempaddr; |
| __s32 temp_valid_lft; |
| __s32 temp_prefered_lft; |
| __s32 regen_max_retry; |
| __s32 max_desync_factor; |
| #endif |
| __s32 max_addresses; |
| __s32 accept_ra_defrtr; |
| __s32 accept_ra_pinfo; |
| #ifdef CONFIG_IPV6_ROUTER_PREF |
| __s32 accept_ra_rtr_pref; |
| __s32 rtr_probe_interval; |
| #ifdef CONFIG_IPV6_ROUTE_INFO |
| __s32 accept_ra_rt_info_max_plen; |
| #endif |
| #endif |
| __s32 proxy_ndp; |
| __s32 accept_source_route; |
| #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| __s32 optimistic_dad; |
| #endif |
| void *sysctl; |
| }; |
| |
| /* index values for the variables in ipv6_devconf */ |
| enum { |
| DEVCONF_FORWARDING = 0, |
| DEVCONF_HOPLIMIT, |
| DEVCONF_MTU6, |
| DEVCONF_ACCEPT_RA, |
| DEVCONF_ACCEPT_REDIRECTS, |
| DEVCONF_AUTOCONF, |
| DEVCONF_DAD_TRANSMITS, |
| DEVCONF_RTR_SOLICITS, |
| DEVCONF_RTR_SOLICIT_INTERVAL, |
| DEVCONF_RTR_SOLICIT_DELAY, |
| DEVCONF_USE_TEMPADDR, |
| DEVCONF_TEMP_VALID_LFT, |
| DEVCONF_TEMP_PREFERED_LFT, |
| DEVCONF_REGEN_MAX_RETRY, |
| DEVCONF_MAX_DESYNC_FACTOR, |
| DEVCONF_MAX_ADDRESSES, |
| DEVCONF_FORCE_MLD_VERSION, |
| DEVCONF_ACCEPT_RA_DEFRTR, |
| DEVCONF_ACCEPT_RA_PINFO, |
| DEVCONF_ACCEPT_RA_RTR_PREF, |
| DEVCONF_RTR_PROBE_INTERVAL, |
| DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, |
| DEVCONF_PROXY_NDP, |
| DEVCONF_OPTIMISTIC_DAD, |
| DEVCONF_ACCEPT_SOURCE_ROUTE, |
| DEVCONF_MAX |
| }; |
| |
| #ifdef __KERNEL__ |
| #include <linux/icmpv6.h> |
| #include <linux/tcp.h> |
| #include <linux/udp.h> |
| |
| #include <net/inet_sock.h> |
| |
| static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
| { |
| return (struct ipv6hdr *)skb_network_header(skb); |
| } |
| |
| static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
| { |
| return (struct ipv6hdr *)skb_transport_header(skb); |
| } |
| |
| /* |
| This structure contains results of exthdrs parsing |
| as offsets from skb->nh. |
| */ |
| |
| struct inet6_skb_parm { |
| int iif; |
| __u16 ra; |
| __u16 hop; |
| __u16 dst0; |
| __u16 srcrt; |
| __u16 dst1; |
| __u16 lastopt; |
| __u32 nhoff; |
| __u16 flags; |
| #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
| __u16 dsthao; |
| #endif |
| |
| #define IP6SKB_XFRM_TRANSFORMED 1 |
| }; |
| |
| #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
| |
| static inline int inet6_iif(const struct sk_buff *skb) |
| { |
| return IP6CB(skb)->iif; |
| } |
| |
| struct inet6_request_sock { |
| struct in6_addr loc_addr; |
| struct in6_addr rmt_addr; |
| struct sk_buff *pktopts; |
| int iif; |
| }; |
| |
| struct tcp6_request_sock { |
| struct tcp_request_sock tcp6rsk_tcp; |
| struct inet6_request_sock tcp6rsk_inet6; |
| }; |
| |
| struct ipv6_mc_socklist; |
| struct ipv6_ac_socklist; |
| struct ipv6_fl_socklist; |
| |
| /** |
| * struct ipv6_pinfo - ipv6 private area |
| * |
| * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) |
| * this _must_ be the last member, so that inet6_sk_generic |
| * is able to calculate its offset from the base struct sock |
| * by using the struct proto->slab_obj_size member. -acme |
| */ |
| struct ipv6_pinfo { |
| struct in6_addr saddr; |
| struct in6_addr rcv_saddr; |
| struct in6_addr daddr; |
| struct in6_addr *daddr_cache; |
| #ifdef CONFIG_IPV6_SUBTREES |
| struct in6_addr *saddr_cache; |
| #endif |
| |
| __be32 flow_label; |
| __u32 frag_size; |
| __s16 hop_limit; |
| __s16 mcast_hops; |
| int mcast_oif; |
| |
| /* pktoption flags */ |
| union { |
| struct { |
| __u16 srcrt:1, |
| osrcrt:1, |
| rxinfo:1, |
| rxoinfo:1, |
| rxhlim:1, |
| rxohlim:1, |
| hopopts:1, |
| ohopopts:1, |
| dstopts:1, |
| odstopts:1, |
| rxflow:1, |
| rxtclass:1; |
| } bits; |
| __u16 all; |
| } rxopt; |
| |
| /* sockopt flags */ |
| __u8 mc_loop:1, |
| recverr:1, |
| sndflow:1, |
| pmtudisc:2, |
| ipv6only:1; |
| __u8 tclass; |
| |
| __u32 dst_cookie; |
| |
| struct ipv6_mc_socklist *ipv6_mc_list; |
| struct ipv6_ac_socklist *ipv6_ac_list; |
| struct ipv6_fl_socklist *ipv6_fl_list; |
| |
| struct ipv6_txoptions *opt; |
| struct sk_buff *pktoptions; |
| struct { |
| struct ipv6_txoptions *opt; |
| struct rt6_info *rt; |
| int hop_limit; |
| int tclass; |
| } cork; |
| }; |
| |
| /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
| struct raw6_sock { |
| /* inet_sock has to be the first member of raw6_sock */ |
| struct inet_sock inet; |
| __u32 checksum; /* perform checksum */ |
| __u32 offset; /* checksum offset */ |
| struct icmp6_filter filter; |
| /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
| struct ipv6_pinfo inet6; |
| }; |
| |
| struct udp6_sock { |
| struct udp_sock udp; |
| /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ |
| struct ipv6_pinfo inet6; |
| }; |
| |
| struct tcp6_sock { |
| struct tcp_sock tcp; |
| /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ |
| struct ipv6_pinfo inet6; |
| }; |
| |
| extern int inet6_sk_rebuild_header(struct sock *sk); |
| |
| #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
| { |
| return inet_sk(__sk)->pinet6; |
| } |
| |
| static inline struct inet6_request_sock * |
| inet6_rsk(const struct request_sock *rsk) |
| { |
| return (struct inet6_request_sock *)(((u8 *)rsk) + |
| inet_rsk(rsk)->inet6_rsk_offset); |
| } |
| |
| static inline u32 inet6_rsk_offset(struct request_sock *rsk) |
| { |
| return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); |
| } |
| |
| static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) |
| { |
| struct request_sock *req = reqsk_alloc(ops); |
| |
| if (req != NULL) |
| inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); |
| |
| return req; |
| } |
| |
| static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| { |
| return (struct raw6_sock *)sk; |
| } |
| |
| static inline void inet_sk_copy_descendant(struct sock *sk_to, |
| const struct sock *sk_from) |
| { |
| int ancestor_size = sizeof(struct inet_sock); |
| |
| if (sk_from->sk_family == PF_INET6) |
| ancestor_size += sizeof(struct ipv6_pinfo); |
| |
| __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); |
| } |
| |
| #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) |
| #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) |
| |
| struct inet6_timewait_sock { |
| struct in6_addr tw_v6_daddr; |
| struct in6_addr tw_v6_rcv_saddr; |
| }; |
| |
| struct tcp6_timewait_sock { |
| struct tcp_timewait_sock tcp6tw_tcp; |
| struct inet6_timewait_sock tcp6tw_inet6; |
| }; |
| |
| static inline u16 inet6_tw_offset(const struct proto *prot) |
| { |
| return prot->twsk_prot->twsk_obj_size - |
| sizeof(struct inet6_timewait_sock); |
| } |
| |
| static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) |
| { |
| return (struct inet6_timewait_sock *)(((u8 *)sk) + |
| inet_twsk(sk)->tw_ipv6_offset); |
| } |
| |
| static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
| { |
| return likely(sk->sk_state != TCP_TIME_WAIT) ? |
| &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
| } |
| |
| static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
| { |
| return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
| } |
| |
| static inline int inet_v6_ipv6only(const struct sock *sk) |
| { |
| return likely(sk->sk_state != TCP_TIME_WAIT) ? |
| ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
| } |
| #else |
| #define __ipv6_only_sock(sk) 0 |
| #define ipv6_only_sock(sk) 0 |
| |
| static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
| { |
| return NULL; |
| } |
| |
| static inline struct inet6_request_sock * |
| inet6_rsk(const struct request_sock *rsk) |
| { |
| return NULL; |
| } |
| |
| static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
| { |
| return NULL; |
| } |
| |
| #define __inet6_rcv_saddr(__sk) NULL |
| #define inet6_rcv_saddr(__sk) NULL |
| #define tcp_twsk_ipv6only(__sk) 0 |
| #define inet_v6_ipv6only(__sk) 0 |
| #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ |
| |
| #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\ |
| (((__sk)->sk_hash == (__hash)) && \ |
| ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \ |
| ((__sk)->sk_family == AF_INET6) && \ |
| ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ |
| ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ |
| (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _IPV6_H */ |