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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

{

        __be32          a4;

        __be32          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;

        __be32          spi;

        __u8            proto;

};

struct xfrm_sec_ctx {

        __u8    ctx_doi;

        __u8    ctx_alg;

        __u16   ctx_len;

        __u32   ctx_sid;

        char    ctx_str[0];

};

/* Security Context Domains of Interpretation */

#define XFRM_SC_DOI_RESERVED 0

#define XFRM_SC_DOI_LSM 1

/* Security Context Algorithms */

#define XFRM_SC_ALG_RESERVED 0

#define XFRM_SC_ALG_SELINUX 1

/* Selector, used as selector both on policy rules (SPD) and SAs. */

struct xfrm_selector

{

        xfrm_address_t  daddr;

        xfrm_address_t  saddr;

        __be16  dport;

        __be16  dport_mask;

        __be16  sport;

        __be16  sport_mask;

        __u16   family;

        __u8    prefixlen_d;

        __u8    prefixlen_s;

        __u8    proto;

        int     ifindex;

        uid_t   user;

};

#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_TYPE_MAIN   = 0,

        XFRM_POLICY_TYPE_SUB    = 1,

        XFRM_POLICY_TYPE_MAX    = 2

};

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 */

};

#define XFRM_MODE_TRANSPORT 0

#define XFRM_MODE_TUNNEL 1

#define XFRM_MODE_ROUTEOPTIMIZATION 2

#define XFRM_MODE_IN_TRIGGER 3

#define XFRM_MODE_BEET 4

#define XFRM_MODE_MAX 5

/* Netlink configuration messages.  */

enum {

        XFRM_MSG_BASE = 0x10,

        XFRM_MSG_NEWSA = 0x10,

#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA

        XFRM_MSG_DELSA,

#define XFRM_MSG_DELSA XFRM_MSG_DELSA

        XFRM_MSG_GETSA,

#define XFRM_MSG_GETSA XFRM_MSG_GETSA

        XFRM_MSG_NEWPOLICY,

#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY

        XFRM_MSG_DELPOLICY,

#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY

        XFRM_MSG_GETPOLICY,

#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY

        XFRM_MSG_ALLOCSPI,

#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI

        XFRM_MSG_ACQUIRE,

#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE

        XFRM_MSG_EXPIRE,

#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE

        XFRM_MSG_UPDPOLICY,

#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY

        XFRM_MSG_UPDSA,

#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA

        XFRM_MSG_POLEXPIRE,

#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE

        XFRM_MSG_FLUSHSA,

#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA

        XFRM_MSG_FLUSHPOLICY,

#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY

        XFRM_MSG_NEWAE,

#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE

        XFRM_MSG_GETAE,

#define XFRM_MSG_GETAE XFRM_MSG_GETAE

        XFRM_MSG_REPORT,

#define XFRM_MSG_REPORT XFRM_MSG_REPORT

        XFRM_MSG_MIGRATE,

#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE

        XFRM_MSG_NEWSADINFO,

#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO

        XFRM_MSG_GETSADINFO,

#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO

        XFRM_MSG_NEWSPDINFO,

#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO

        XFRM_MSG_GETSPDINFO,

#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO

        __XFRM_MSG_MAX

};

#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)

#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)

/*

 * Generic LSM security context for comunicating to user space

 * NOTE: Same format as sadb_x_sec_ctx

 */

struct xfrm_user_sec_ctx {

        __u16                   len;

        __u16                   exttype;

        __u8                    ctx_alg;  /* LSMs: e.g., selinux == 1 */

        __u8                    ctx_doi;

        __u16                   ctx_len;

};

struct xfrm_user_tmpl {

        struct xfrm_id          id;

        __u16                   family;

        xfrm_address_t          saddr;

        __u32                   reqid;

        __u8                    mode;

        __u8                    share;

        __u8                    optional;

        __u32                   aalgos;

        __u32                   ealgos;

        __u32                   calgos;

};

struct xfrm_encap_tmpl {

        __u16           encap_type;

        __be16          encap_sport;

        __be16          encap_dport;

        xfrm_address_t  encap_oa;

};

/* AEVENT flags  */

enum xfrm_ae_ftype_t {

        XFRM_AE_UNSPEC,

        XFRM_AE_RTHR=1, /* replay threshold*/

        XFRM_AE_RVAL=2, /* replay value */

        XFRM_AE_LVAL=4, /* lifetime value */

        XFRM_AE_ETHR=8, /* expiry timer threshold */

        XFRM_AE_CR=16, /* Event cause is replay update */

        XFRM_AE_CE=32, /* Event cause is timer expiry */

        XFRM_AE_CU=64, /* Event cause is policy update */

        __XFRM_AE_MAX

#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)

};

struct xfrm_userpolicy_type {

        __u8            type;

        __u16           reserved1;

        __u8            reserved2;

};

/* 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_ENCAP,            /* struct xfrm_algo + struct xfrm_encap_tmpl */

        XFRMA_TMPL,             /* 1 or more struct xfrm_user_tmpl */

        XFRMA_SA,

        XFRMA_POLICY,

        XFRMA_SEC_CTX,          /* struct xfrm_sec_ctx */

        XFRMA_LTIME_VAL,

        XFRMA_REPLAY_VAL,

        XFRMA_REPLAY_THRESH,

        XFRMA_ETIMER_THRESH,

        XFRMA_SRCADDR,          /* xfrm_address_t */

        XFRMA_COADDR,           /* xfrm_address_t */

        XFRMA_LASTUSED,

        XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */

        XFRMA_MIGRATE,

        __XFRMA_MAX

#define XFRMA_MAX (__XFRMA_MAX - 1)

};

enum xfrm_sadattr_type_t {

        XFRMA_SAD_UNSPEC,

        XFRMA_SAD_CNT,

        XFRMA_SAD_HINFO,

        __XFRMA_SAD_MAX

#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)

};

struct xfrmu_sadhinfo {

        __u32 sadhcnt; /* current hash bkts */

        __u32 sadhmcnt; /* max allowed hash bkts */

};

enum xfrm_spdattr_type_t {

        XFRMA_SPD_UNSPEC,

        XFRMA_SPD_INFO,

        XFRMA_SPD_HINFO,

        __XFRMA_SPD_MAX

#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)

};

struct xfrmu_spdinfo {

        __u32 incnt;

        __u32 outcnt;

        __u32 fwdcnt;

        __u32 inscnt;

        __u32 outscnt;

        __u32 fwdscnt;

};

struct xfrmu_spdhinfo {

        __u32 spdhcnt;

        __u32 spdhmcnt;

};

struct xfrm_usersa_info {

        struct xfrm_selector            sel;

        struct xfrm_id                  id;

        xfrm_address_t                  saddr;

        struct xfrm_lifetime_cfg        lft;

        struct xfrm_lifetime_cur        curlft;

        struct xfrm_stats               stats;

        __u32                           seq;

        __u32                           reqid;

        __u16                           family;

        __u8                            mode;           /* XFRM_MODE_xxx */

        __u8                            replay_window;

        __u8                            flags;

#define XFRM_STATE_NOECN        1

#define XFRM_STATE_DECAP_DSCP   2

#define XFRM_STATE_NOPMTUDISC   4

#define XFRM_STATE_WILDRECV     8

};

struct xfrm_usersa_id {

        xfrm_address_t                  daddr;

        __be32                          spi;

        __u16                           family;

        __u8                            proto;

};

struct xfrm_aevent_id {

        struct xfrm_usersa_id           sa_id;

        xfrm_address_t                  saddr;

        __u32                           flags;

        __u32                           reqid;

};

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;

        __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_selector            sel;

        struct xfrm_userpolicy_info     policy;

        __u32                           aalgos;

        __u32                           ealgos;

        __u32                           calgos;

        __u32                           seq;

};

struct xfrm_user_expire {

        struct xfrm_usersa_info         state;

        __u8                            hard;

};

struct xfrm_user_polexpire {

        struct xfrm_userpolicy_info     pol;

        __u8                            hard;

};

struct xfrm_usersa_flush {

        __u8                            proto;

};

struct xfrm_user_report {

        __u8                            proto;

        struct xfrm_selector            sel;

};

struct xfrm_user_migrate {

        xfrm_address_t                  old_daddr;

        xfrm_address_t                  old_saddr;

        xfrm_address_t                  new_daddr;

        xfrm_address_t                  new_saddr;

        __u8                            proto;

        __u8                            mode;

        __u16                           reserved;

        __u32                           reqid;

        __u16                           old_family;

        __u16                           new_family;

};

#ifndef __KERNEL__

/* backwards compatibility for userspace */

#define XFRMGRP_ACQUIRE         1

#define XFRMGRP_EXPIRE          2

#define XFRMGRP_SA              4

#define XFRMGRP_POLICY          8

#define XFRMGRP_REPORT          0x20

#endif

enum xfrm_nlgroups {

        XFRMNLGRP_NONE,

#define XFRMNLGRP_NONE          XFRMNLGRP_NONE

        XFRMNLGRP_ACQUIRE,

#define XFRMNLGRP_ACQUIRE       XFRMNLGRP_ACQUIRE

        XFRMNLGRP_EXPIRE,

#define XFRMNLGRP_EXPIRE        XFRMNLGRP_EXPIRE

        XFRMNLGRP_SA,

#define XFRMNLGRP_SA            XFRMNLGRP_SA

        XFRMNLGRP_POLICY,

#define XFRMNLGRP_POLICY        XFRMNLGRP_POLICY

        XFRMNLGRP_AEVENTS,

#define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS

        XFRMNLGRP_REPORT,

#define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT

        XFRMNLGRP_MIGRATE,

#define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE

        __XFRMNLGRP_MAX

};

#define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)

#endif /* _LINUX_XFRM_H */