From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/linux/ipv6.h | 327 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 327 insertions(+) create mode 100644 include/linux/ipv6.h (limited to 'include/linux/ipv6.h') diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h new file mode 100644 index 000000000..82806c60a --- /dev/null +++ b/include/linux/ipv6.h @@ -0,0 +1,327 @@ +#ifndef _IPV6_H +#define _IPV6_H + +#include + +#define ipv6_optlen(p) (((p)->hdrlen+1) << 3) +#define ipv6_authlen(p) (((p)->hdrlen+2) << 2) +/* + * 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; + __s32 mldv1_unsolicited_report_interval; + __s32 mldv2_unsolicited_report_interval; + __s32 use_tempaddr; + __s32 temp_valid_lft; + __s32 temp_prefered_lft; + __s32 regen_max_retry; + __s32 max_desync_factor; + __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; + __s32 accept_ra_from_local; +#ifdef CONFIG_IPV6_OPTIMISTIC_DAD + __s32 optimistic_dad; + __s32 use_optimistic; +#endif +#ifdef CONFIG_IPV6_MROUTE + __s32 mc_forwarding; +#endif + __s32 disable_ipv6; + __s32 accept_dad; + __s32 force_tllao; + __s32 ndisc_notify; + __s32 suppress_frag_ndisc; + __s32 accept_ra_mtu; + struct ipv6_stable_secret { + bool initialized; + struct in6_addr secret; + } stable_secret; + void *sysctl; +}; + +struct ipv6_params { + __s32 disable_ipv6; + __s32 autoconf; +}; +extern struct ipv6_params ipv6_defaults; +#include +#include +#include + +#include + +static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) +{ + return (struct ipv6hdr *)skb_network_header(skb); +} + +static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) +{ + return (struct ipv6hdr *)skb_inner_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; + __be16 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 + __u16 frag_max_size; + +#define IP6SKB_XFRM_TRANSFORMED 1 +#define IP6SKB_FORWARDED 2 +#define IP6SKB_REROUTED 4 +#define IP6SKB_ROUTERALERT 8 +#define IP6SKB_FRAGMENTED 16 +}; + +#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 tcp6_request_sock { + struct tcp_request_sock tcp6rsk_tcp; +}; + +struct ipv6_mc_socklist; +struct ipv6_ac_socklist; +struct ipv6_fl_socklist; + +struct inet6_cork { + struct ipv6_txoptions *opt; + u8 hop_limit; + u8 tclass; +}; + +/** + * 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_pktinfo sticky_pktinfo; + const struct in6_addr *daddr_cache; +#ifdef CONFIG_IPV6_SUBTREES + const 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 ucast_oif; + 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, + repflow:1, + pmtudisc:3, + padding:1, /* 1 bit hole */ + srcprefs:3, /* 001: prefer temporary address + * 010: prefer public address + * 100: prefer care-of address + */ + dontfrag:1, + autoflowlabel:1; + __u8 min_hopcount; + __u8 tclass; + __be32 rcv_flowinfo; + + __u32 dst_cookie; + __u32 rx_dst_cookie; + + struct ipv6_mc_socklist __rcu *ipv6_mc_list; + struct ipv6_ac_socklist *ipv6_ac_list; + struct ipv6_fl_socklist __rcu *ipv6_fl_list; + + struct ipv6_txoptions *opt; + struct sk_buff *pktoptions; + struct sk_buff *rxpmtu; + struct inet6_cork 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); + +struct tcp6_timewait_sock { + struct tcp_timewait_sock tcp6tw_tcp; +}; + +#if IS_ENABLED(CONFIG_IPV6) +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) (sk->sk_ipv6only) +#define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) +#define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ + inet6_sk(sk)->rxopt.bits.rxinfo) + +static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) +{ + if (sk->sk_family == AF_INET6) + return &sk->sk_v6_rcv_saddr; + return NULL; +} + +static inline int inet_v6_ipv6only(const struct sock *sk) +{ + /* ipv6only field is at same position for timewait and other sockets */ + return ipv6_only_sock(sk); +} +#else +#define __ipv6_only_sock(sk) 0 +#define ipv6_only_sock(sk) 0 +#define ipv6_sk_rxinfo(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 tcp_twsk_ipv6only(__sk) 0 +#define inet_v6_ipv6only(__sk) 0 +#endif /* IS_ENABLED(CONFIG_IPV6) */ +#endif /* _IPV6_H */ -- cgit v1.2.3-54-g00ecf