diff options
Diffstat (limited to 'include/linux/ipv6.h')
| -rw-r--r-- | include/linux/ipv6.h | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h new file mode 100644 index 00000000000..ab0d0efbf24 --- /dev/null +++ b/include/linux/ipv6.h @@ -0,0 +1,316 @@ +#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 bitmap; /* strict/loose bit map */ + 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; +}; + +#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) + +/** + * 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 { + __u8 srcrt:2, + rxinfo:1, + rxhlim:1, + hopopts:1, + dstopts:1, + rxflow:1; + } bits; + __u8 all; + } rxopt; + + /* sockopt flags */ + __u8 mc_loop:1, + recverr:1, + sndflow:1, + pmtudisc:2, + ipv6only:1; + + __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; + } 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)) +#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; +} + +#endif + +#endif + +#endif |