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#ifndef _LINUX_XFRM_H
#define _LINUX_XFRM_H
#include <linux/types.h>
/* All of the structures in this file may not change size as they are
* passed into the kernel from userspace via netlink sockets.
*/
/* Structure to encapsulate addresses. I do not want to use
* "standard" structure. My apologies.
*/
typedef union
{
struct {
__u32 addr;
__u32 mask; /* Use unused bits to cache mask. */
} a4;
#define xfrm4_addr a4.addr
#define xfrm4_mask a4.mask
__u32 a6[4];
} xfrm_address_t;
/* Ident of a specific xfrm_state. It is used on input to lookup
* the state by (spi,daddr,ah/esp) or to store information about
* spi, protocol and tunnel address on output.
*/
struct xfrm_id
{
xfrm_address_t daddr;
__u32 spi;
__u8 proto;
};
/* Selector, used as selector both on policy rules (SPD) and SAs. */
struct xfrm_selector
{
xfrm_address_t daddr;
xfrm_address_t saddr;
__u16 dport;
__u16 dport_mask;
__u16 sport;
__u16 sport_mask;
__u8 prefixlen_d;
__u8 prefixlen_s;
__u8 proto;
int ifindex;
uid_t user;
void *owner;
};
#define XFRM_INF (~(u64)0)
struct xfrm_lifetime_cfg
{
__u64 soft_byte_limit;
__u64 hard_byte_limit;
__u64 soft_packet_limit;
__u64 hard_packet_limit;
__u64 soft_add_expires_seconds;
__u64 hard_add_expires_seconds;
__u64 soft_use_expires_seconds;
__u64 hard_use_expires_seconds;
};
struct xfrm_lifetime_cur
{
__u64 bytes;
__u64 packets;
__u64 add_time;
__u64 use_time;
};
struct xfrm_replay_state
{
__u32 oseq;
__u32 seq;
__u32 bitmap;
};
struct xfrm_algo {
char alg_name[64];
int alg_key_len; /* in bits */
char alg_key[0];
};
struct xfrm_stats {
__u32 replay_window;
__u32 replay;
__u32 integrity_failed;
};
enum
{
XFRM_POLICY_IN = 0,
XFRM_POLICY_OUT = 1,
XFRM_POLICY_FWD = 2,
XFRM_POLICY_MAX = 3
};
enum
{
XFRM_SHARE_ANY, /* No limitations */
XFRM_SHARE_SESSION, /* For this session only */
XFRM_SHARE_USER, /* For this user only */
XFRM_SHARE_UNIQUE /* Use once */
};
/* Netlink configuration messages. */
#define XFRM_MSG_BASE 0x10
#define XFRM_MSG_NEWSA (RTM_BASE + 0)
#define XFRM_MSG_DELSA (RTM_BASE + 1)
#define XFRM_MSG_GETSA (RTM_BASE + 2)
#define XFRM_MSG_NEWPOLICY (RTM_BASE + 3)
#define XFRM_MSG_DELPOLICY (RTM_BASE + 4)
#define XFRM_MSG_GETPOLICY (RTM_BASE + 5)
#define XFRM_MSG_ALLOCSPI (RTM_BASE + 6)
#define XFRM_MSG_ACQUIRE (RTM_BASE + 7)
#define XFRM_MSG_EXPIRE (RTM_BASE + 8)
#define XFRM_MSG_MAX (XFRM_MSG_EXPIRE+1)
struct xfrm_user_tmpl {
struct xfrm_id id;
xfrm_address_t saddr;
__u16 reqid;
__u8 mode;
__u8 share;
__u8 optional;
__u32 aalgos;
__u32 ealgos;
__u32 calgos;
};
/* Netlink message attributes. */
enum xfrm_attr_type_t {
XFRMA_UNSPEC,
XFRMA_ALG_AUTH, /* struct xfrm_algo */
XFRMA_ALG_CRYPT, /* struct xfrm_algo */
XFRMA_ALG_COMP, /* struct xfrm_algo */
XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
#define XFRMA_MAX XFRMA_TMPL
};
struct xfrm_usersa_info {
struct xfrm_selector sel;
struct xfrm_id id;
struct xfrm_lifetime_cfg lft;
struct xfrm_lifetime_cur curlft;
struct xfrm_stats stats;
__u32 seq;
__u16 family;
__u16 reqid;
__u8 mode; /* 0=transport,1=tunnel */
__u8 replay_window;
};
struct xfrm_usersa_id {
xfrm_address_t saddr;
__u32 spi;
__u8 proto;
};
struct xfrm_userspi_info {
struct xfrm_usersa_info info;
u32 min;
u32 max;
};
struct xfrm_userpolicy_info {
struct xfrm_selector sel;
struct xfrm_lifetime_cfg lft;
struct xfrm_lifetime_cur curlft;
__u32 priority;
__u32 index;
__u16 family;
__u8 dir;
__u8 action;
#define XFRM_POLICY_ALLOW 0
#define XFRM_POLICY_BLOCK 1
__u8 flags;
#define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
__u8 share;
};
struct xfrm_userpolicy_id {
struct xfrm_selector sel;
__u32 index;
__u8 dir;
};
struct xfrm_user_acquire {
struct xfrm_id id;
xfrm_address_t saddr;
struct xfrm_userpolicy_info policy;
__u32 aalgos;
__u32 ealgos;
__u32 calgos;
__u32 seq;
};
struct xfrm_user_expire {
struct xfrm_usersa_info state;
__u8 hard;
};
#define XFRMGRP_ACQUIRE 1
#define XFRMGRP_EXPIRE 2
#endif /* _LINUX_XFRM_H */
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