diff options
Diffstat (limited to 'include/linux/ipv6.h')
| -rw-r--r-- | include/linux/ipv6.h | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h new file mode 100644 index 00000000..0c997767 --- /dev/null +++ b/include/linux/ipv6.h @@ -0,0 +1,538 @@ +#ifndef _IPV6_H +#define _IPV6_H + +#include <linux/types.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 ip6_mtuinfo { + struct sockaddr_in6 ip6m_addr; + __u32 ip6m_mtu; +}; + +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. + */ +} __attribute__((packed)); /* required for some archs */ + +#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; +}; + +#ifdef __KERNEL__ +/* + * 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 +#ifdef CONFIG_IPV6_MROUTE + __s32 mc_forwarding; +#endif + __s32 disable_ipv6; + __s32 accept_dad; + __s32 force_tllao; + void *sysctl; +}; + +struct ipv6_params { + __s32 disable_ipv6; + __s32 autoconf; +}; +extern struct ipv6_params ipv6_defaults; +#endif + +/* 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_MC_FORWARDING, + DEVCONF_DISABLE_IPV6, + DEVCONF_ACCEPT_DAD, + DEVCONF_FORCE_TLLAO, + 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; + __u16 nhoff; + __u16 flags; +#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) + __u16 dsthao; +#endif + +#define IP6SKB_XFRM_TRANSFORMED 1 +#define IP6SKB_FORWARDED 2 +#define IP6SKB_REROUTED 4 +}; + +#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) +#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((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_pktinfo sticky_pktinfo; + struct in6_addr *daddr_cache; +#ifdef CONFIG_IPV6_SUBTREES + struct in6_addr *saddr_cache; +#endif + + __be32 flow_label; + __u32 frag_size; + + /* + * Packed in 16bits. + * Omit one shift by by putting the signed field at MSB. + */ +#if defined(__BIG_ENDIAN_BITFIELD) + __s16 hop_limit:9; + __u16 __unused_1:7; +#else + __u16 __unused_1:7; + __s16 hop_limit:9; +#endif + +#if defined(__BIG_ENDIAN_BITFIELD) + /* Packed in 16bits. */ + __s16 mcast_hops:9; + __u16 __unused_2:6, + mc_loop:1; +#else + __u16 mc_loop:1, + __unused_2:6; + __s16 mcast_hops:9; +#endif + 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, + rxpmtu:1, + rxorigdstaddr:1; + /* 2 bits hole */ + } bits; + __u16 all; + } rxopt; + + /* sockopt flags */ + __u16 recverr:1, + sndflow:1, + pmtudisc:2, + ipv6only:1, + srcprefs:3, /* 001: prefer temporary address + * 010: prefer public address + * 100: prefer care-of address + */ + dontfrag:1; + __u8 min_hopcount; + __u8 tclass; + __u8 padding; + + __u32 dst_cookie; + + struct ipv6_mc_socklist __rcu *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 sk_buff *rxpmtu; + struct { + struct ipv6_txoptions *opt; + u8 hop_limit; + u8 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; + __u32 ip6mr_table; + /* 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); + inet6_rsk(req)->pktopts = NULL; + } + + 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, __net, __hash, __saddr, __daddr, __ports, __dif)\ + (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ + ((*((__portpair *)&(inet_sk(__sk)->inet_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)))) + +#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \ + (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ + (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \ + ((__sk)->sk_family == PF_INET6) && \ + (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \ + (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \ + (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) + +#endif /* __KERNEL__ */ + +#endif /* _IPV6_H */ |