| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _IPV6_H |
| #define _IPV6_H |
| |
| #include <uapi/linux/ipv6.h> |
| |
| #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_max_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_min_hop_limit; |
| __s32 accept_ra_pinfo; |
| __s32 ignore_routes_with_linkdown; |
| #ifdef CONFIG_IPV6_ROUTER_PREF |
| __s32 accept_ra_rtr_pref; |
| __s32 rtr_probe_interval; |
| #ifdef CONFIG_IPV6_ROUTE_INFO |
| __s32 accept_ra_rt_info_min_plen; |
| __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 drop_unicast_in_l2_multicast; |
| __s32 accept_dad; |
| __s32 force_tllao; |
| __s32 ndisc_notify; |
| __s32 suppress_frag_ndisc; |
| __s32 accept_ra_mtu; |
| __s32 drop_unsolicited_na; |
| struct ipv6_stable_secret { |
| bool initialized; |
| struct in6_addr secret; |
| } stable_secret; |
| __s32 use_oif_addrs_only; |
| __s32 keep_addr_on_down; |
| __s32 seg6_enabled; |
| #ifdef CONFIG_IPV6_SEG6_HMAC |
| __s32 seg6_require_hmac; |
| #endif |
| __u32 enhanced_dad; |
| __u32 addr_gen_mode; |
| __s32 disable_policy; |
| __s32 ndisc_tclass; |
| |
| struct ctl_table_header *sysctl_header; |
| }; |
| |
| 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 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 IP6SKB_HOPBYHOP 32 |
| #define IP6SKB_L3SLAVE 64 |
| #define IP6SKB_JUMBOGRAM 128 |
| }; |
| |
| #if defined(CONFIG_NET_L3_MASTER_DEV) |
| static inline bool ipv6_l3mdev_skb(__u16 flags) |
| { |
| return flags & IP6SKB_L3SLAVE; |
| } |
| #else |
| static inline bool ipv6_l3mdev_skb(__u16 flags) |
| { |
| return false; |
| } |
| #endif |
| |
| #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) |
| { |
| bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags); |
| |
| return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; |
| } |
| |
| static inline bool inet6_is_jumbogram(const struct sk_buff *skb) |
| { |
| return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM); |
| } |
| |
| /* can not be used in TCP layer after tcp_v6_fill_cb */ |
| static inline int inet6_sdif(const struct sk_buff *skb) |
| { |
| #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) |
| if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) |
| return IP6CB(skb)->iif; |
| #endif |
| return 0; |
| } |
| |
| /* can not be used in TCP layer after tcp_v6_fill_cb */ |
| static inline bool inet6_exact_dif_match(struct net *net, struct sk_buff *skb) |
| { |
| #if defined(CONFIG_NET_L3_MASTER_DEV) |
| if (!net->ipv4.sysctl_tcp_l3mdev_accept && |
| skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) |
| return true; |
| #endif |
| return false; |
| } |
| |
| 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, |
| recvfragsize:1; |
| /* 1 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 __rcu *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) |
| bool ipv6_mod_enabled(void); |
| |
| static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) |
| { |
| return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; |
| } |
| |
| 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 bool ipv6_mod_enabled(void) |
| { |
| return false; |
| } |
| |
| 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 */ |