#ifndef _IPV6_H #define _IPV6_H #include <uapi/linux/ipv6.h> #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) /* * 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; __s32 ndisc_notify; void *sysctl; }; struct ipv6_params { __s32 disable_ipv6; __s32 autoconf; }; extern struct ipv6_params ipv6_defaults; #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 *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 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; 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, 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 rcv_tclass; __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 { 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); 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 struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) { return (struct inet6_timewait_sock *)(((u8 *)sk) + inet_twsk(sk)->tw_ipv6_offset); } #if IS_ENABLED(CONFIG_IPV6) 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)) 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 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 /* IS_ENABLED(CONFIG_IPV6) */ #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ ((inet_sk(__sk)->inet_portpair == (__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))) && \ net_eq(sock_net(__sk), (__net))) #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ ((inet_twsk(__sk)->tw_portpair == (__ports)) && \ ((__sk)->sk_family == AF_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))) && \ net_eq(sock_net(__sk), (__net))) #endif /* _IPV6_H */