375 lines
8.4 KiB
C
375 lines
8.4 KiB
C
#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_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;
|
|
|
|
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
|
|
};
|
|
|
|
#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;
|
|
}
|
|
|
|
/* 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 */
|