ipv6.h
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上传日期:2009-04-28
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文件大小:8k
- #ifndef _IPV6_H
- #define _IPV6_H
- #include <linux/config.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 /* this hop must be a neighbor */
- #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 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
- };
- struct ipv6_auth_hdr {
- __u8 nexthdr;
- __u8 hdrlen; /* This one is measured in 32 bit units! */
- __u16 reserved;
- __u32 spi;
- __u32 seq_no; /* Sequence number */
- __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
- };
- struct ipv6_esp_hdr {
- __u32 spi;
- __u32 seq_no; /* Sequence number */
- __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
- };
- struct ipv6_comp_hdr {
- __u8 nexthdr;
- __u8 flags;
- __u16 cpi;
- };
- /*
- * 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];
- __u16 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;
- 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_MAX
- };
- #ifdef __KERNEL__
- #include <linux/in6.h> /* struct sockaddr_in6 */
- #include <linux/icmpv6.h>
- #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
- #include <linux/tcp.h>
- #include <linux/udp.h>
- /*
- 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;
- };
- #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
- static inline int inet6_iif(const struct sk_buff *skb)
- {
- return IP6CB(skb)->iif;
- }
- struct tcp6_request_sock {
- struct tcp_request_sock req;
- struct in6_addr loc_addr;
- struct in6_addr rmt_addr;
- struct sk_buff *pktopts;
- int iif;
- };
- static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk)
- {
- return (struct tcp6_request_sock *)sk;
- }
- /**
- * 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;
- __u32 flow_label;
- __u32 frag_size;
- __s16 hop_limit;
- __s16 mcast_hops;
- int mcast_oif;
- /* pktoption flags */
- union {
- struct {
- __u16 srcrt:2,
- osrcrt:2,
- 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;
- };
- #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 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))
- #include <linux/tcp.h>
- struct tcp6_timewait_sock {
- struct tcp_timewait_sock tw_v6_sk;
- struct in6_addr tw_v6_daddr;
- struct in6_addr tw_v6_rcv_saddr;
- };
- static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk)
- {
- return (struct tcp6_timewait_sock *)sk;
- }
- static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
- {
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- &inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
- }
- static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
- {
- return sk->sk_family == AF_INET6 ? __tcp_v6_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 raw6_sock *raw6_sk(const struct sock *sk)
- {
- return NULL;
- }
- #define __tcp_v6_rcv_saddr(__sk) NULL
- #define tcp_v6_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)) &&
- ((*((__u32 *)&(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 */