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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_XFRM_H
#define _LINUX_XFRM_H
#include <linux/in6.h>
#include <linux/types.h>
#include <linux/stddef.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];
struct in6_addr in6;
} 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[] __counted_by(ctx_len);
};
/* 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;
__kernel_uid32_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;
};
#define XFRMA_REPLAY_ESN_MAX 4096
struct xfrm_replay_state_esn {
unsigned int bmp_len;
__u32 oseq;
__u32 seq;
__u32 oseq_hi;
__u32 seq_hi;
__u32 replay_window;
__u32 bmp[];
};
struct xfrm_algo {
char alg_name[64];
unsigned int alg_key_len; /* in bits */
char alg_key[];
};
struct xfrm_algo_auth {
char alg_name[64];
unsigned int alg_key_len; /* in bits */
unsigned int alg_trunc_len; /* in bits */
char alg_key[];
};
struct xfrm_algo_aead {
char alg_name[64];
unsigned int alg_key_len; /* in bits */
unsigned int alg_icv_len; /* in bits */
char alg_key[];
};
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,
XFRM_POLICY_TYPE_ANY = 255
};
enum {
XFRM_POLICY_IN = 0,
XFRM_POLICY_OUT = 1,
XFRM_POLICY_FWD = 2,
XFRM_POLICY_MASK = 3,
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_MAPPING,
#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
XFRM_MSG_SETDEFAULT,
#define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT
XFRM_MSG_GETDEFAULT,
#define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT
__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, /* struct xfrm_usersa_info */
XFRMA_POLICY, /*struct xfrm_userpolicy_info */
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, /* __u64 */
XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
XFRMA_MIGRATE,
XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
XFRMA_MARK, /* struct xfrm_mark */
XFRMA_TFCPAD, /* __u32 */
XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */
XFRMA_SA_EXTRA_FLAGS, /* __u32 */
XFRMA_PROTO, /* __u8 */
XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */
XFRMA_PAD,
XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */
XFRMA_SET_MARK, /* __u32 */
XFRMA_SET_MARK_MASK, /* __u32 */
XFRMA_IF_ID, /* __u32 */
XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */
__XFRMA_MAX
#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
#define XFRMA_MAX (__XFRMA_MAX - 1)
};
struct xfrm_mark {
__u32 v; /* value */
__u32 m; /* mask */
};
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_IPV4_HTHRESH,
XFRMA_SPD_IPV6_HTHRESH,
__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 xfrmu_spdhthresh {
__u8 lbits;
__u8 rbits;
};
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
#define XFRM_STATE_ICMP 16
#define XFRM_STATE_AF_UNSPEC 32
#define XFRM_STATE_ALIGN4 64
#define XFRM_STATE_ESN 128
};
#define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1
#define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2
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 */
/* Automatically expand selector to include matching ICMP payloads. */
#define XFRM_POLICY_ICMP 2
__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;
};
/* Used by MIGRATE to pass addresses IKE should use to perform
* SA negotiation with the peer */
struct xfrm_user_kmaddress {
xfrm_address_t local;
xfrm_address_t remote;
__u32 reserved;
__u16 family;
};
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;
};
struct xfrm_user_mapping {
struct xfrm_usersa_id id;
__u32 reqid;
xfrm_address_t old_saddr;
xfrm_address_t new_saddr;
__be16 old_sport;
__be16 new_sport;
};
struct xfrm_address_filter {
xfrm_address_t saddr;
xfrm_address_t daddr;
__u16 family;
__u8 splen;
__u8 dplen;
};
struct xfrm_user_offload {
int ifindex;
__u8 flags;
};
/* This flag was exposed without any kernel code that supports it.
* Unfortunately, strongswan has the code that sets this flag,
* which makes it impossible to reuse this bit.
*
* So leave it here to make sure that it won't be reused by mistake.
*/
#define XFRM_OFFLOAD_IPV6 1
#define XFRM_OFFLOAD_INBOUND 2
/* Two bits above are relevant for state path only, while
* offload is used for both policy and state flows.
*
* In policy offload mode, they are free and can be safely reused.
*/
#define XFRM_OFFLOAD_PACKET 4
struct xfrm_userpolicy_default {
#define XFRM_USERPOLICY_UNSPEC 0
#define XFRM_USERPOLICY_BLOCK 1
#define XFRM_USERPOLICY_ACCEPT 2
__u8 in;
__u8 fwd;
__u8 out;
};
/* backwards compatibility for userspace */
#define XFRMGRP_ACQUIRE 1
#define XFRMGRP_EXPIRE 2
#define XFRMGRP_SA 4
#define XFRMGRP_POLICY 8
#define XFRMGRP_REPORT 0x20
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_MAPPING,
#define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
__XFRMNLGRP_MAX
};
#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
#endif /* _LINUX_XFRM_H */