include/linux/ipv6.h

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This source file includes following definitions.
ipv6_hdr
inner_ipv6_hdr
ipipv6_hdr
inet6_iif
inet6_sk
raw6_sk
inet_sk_copy_descendant
inet6_rcv_saddr
inet_v6_ipv6only
inet6_sk
inet6_rsk
raw6_sk
#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_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;
#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;
        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 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 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 {
                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 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) */

#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif)      \
        (((__sk)->sk_portpair == (__ports))                     &&      \
         ((__sk)->sk_family == AF_INET6)                        &&      \
         ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr))               &&      \
         ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr))   &&      \
         (!(__sk)->sk_bound_dev_if      ||                              \
           ((__sk)->sk_bound_dev_if == (__dif)))                &&      \
         net_eq(sock_net(__sk), (__net)))

#endif /* _IPV6_H */
/* [<][>][^][v][top][bottom][index][help] */
root/include/linux/ipv6.h

INCLUDED FROM

DEFINITIONS
