/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _LINUX_XFRM_H
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#define _LINUX_XFRM_H
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#include <linux/in6.h>
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#include <linux/types.h>
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/* All of the structures in this file may not change size as they are
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* passed into the kernel from userspace via netlink sockets.
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*/
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/* Structure to encapsulate addresses. I do not want to use
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* "standard" structure. My apologies.
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*/
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typedef union {
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__be32 a4;
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__be32 a6[4];
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struct in6_addr in6;
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} xfrm_address_t;
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/* Ident of a specific xfrm_state. It is used on input to lookup
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* the state by (spi,daddr,ah/esp) or to store information about
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* spi, protocol and tunnel address on output.
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*/
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struct xfrm_id {
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xfrm_address_t daddr;
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__be32 spi;
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__u8 proto;
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};
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struct xfrm_sec_ctx {
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__u8 ctx_doi;
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__u8 ctx_alg;
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__u16 ctx_len;
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__u32 ctx_sid;
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char ctx_str[0];
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};
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/* Security Context Domains of Interpretation */
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#define XFRM_SC_DOI_RESERVED 0
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#define XFRM_SC_DOI_LSM 1
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/* Security Context Algorithms */
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#define XFRM_SC_ALG_RESERVED 0
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#define XFRM_SC_ALG_SELINUX 1
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/* Selector, used as selector both on policy rules (SPD) and SAs. */
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struct xfrm_selector {
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xfrm_address_t daddr;
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xfrm_address_t saddr;
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__be16 dport;
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__be16 dport_mask;
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__be16 sport;
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__be16 sport_mask;
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__u16 family;
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__u8 prefixlen_d;
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__u8 prefixlen_s;
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__u8 proto;
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int ifindex;
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__kernel_uid32_t user;
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};
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#define XFRM_INF (~(__u64)0)
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struct xfrm_lifetime_cfg {
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__u64 soft_byte_limit;
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__u64 hard_byte_limit;
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__u64 soft_packet_limit;
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__u64 hard_packet_limit;
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__u64 soft_add_expires_seconds;
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__u64 hard_add_expires_seconds;
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__u64 soft_use_expires_seconds;
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__u64 hard_use_expires_seconds;
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};
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struct xfrm_lifetime_cur {
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__u64 bytes;
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__u64 packets;
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__u64 add_time;
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__u64 use_time;
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};
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struct xfrm_replay_state {
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__u32 oseq;
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__u32 seq;
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__u32 bitmap;
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};
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#define XFRMA_REPLAY_ESN_MAX 4096
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struct xfrm_replay_state_esn {
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unsigned int bmp_len;
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__u32 oseq;
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__u32 seq;
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__u32 oseq_hi;
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__u32 seq_hi;
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__u32 replay_window;
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__u32 bmp[0];
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};
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struct xfrm_algo {
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char alg_name[64];
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unsigned int alg_key_len; /* in bits */
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char alg_key[0];
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};
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struct xfrm_algo_auth {
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char alg_name[64];
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unsigned int alg_key_len; /* in bits */
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unsigned int alg_trunc_len; /* in bits */
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char alg_key[0];
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};
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struct xfrm_algo_aead {
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char alg_name[64];
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unsigned int alg_key_len; /* in bits */
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unsigned int alg_icv_len; /* in bits */
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char alg_key[0];
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};
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struct xfrm_stats {
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__u32 replay_window;
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__u32 replay;
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__u32 integrity_failed;
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};
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enum {
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XFRM_POLICY_TYPE_MAIN = 0,
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XFRM_POLICY_TYPE_SUB = 1,
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XFRM_POLICY_TYPE_MAX = 2,
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XFRM_POLICY_TYPE_ANY = 255
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};
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enum {
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XFRM_POLICY_IN = 0,
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XFRM_POLICY_OUT = 1,
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XFRM_POLICY_FWD = 2,
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XFRM_POLICY_MASK = 3,
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XFRM_POLICY_MAX = 3
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};
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enum {
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XFRM_SHARE_ANY, /* No limitations */
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XFRM_SHARE_SESSION, /* For this session only */
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XFRM_SHARE_USER, /* For this user only */
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XFRM_SHARE_UNIQUE /* Use once */
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};
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#define XFRM_MODE_TRANSPORT 0
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#define XFRM_MODE_TUNNEL 1
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#define XFRM_MODE_ROUTEOPTIMIZATION 2
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#define XFRM_MODE_IN_TRIGGER 3
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#define XFRM_MODE_BEET 4
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#define XFRM_MODE_MAX 5
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/* Netlink configuration messages. */
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enum {
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XFRM_MSG_BASE = 0x10,
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XFRM_MSG_NEWSA = 0x10,
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#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA
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XFRM_MSG_DELSA,
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#define XFRM_MSG_DELSA XFRM_MSG_DELSA
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XFRM_MSG_GETSA,
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#define XFRM_MSG_GETSA XFRM_MSG_GETSA
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XFRM_MSG_NEWPOLICY,
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#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY
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XFRM_MSG_DELPOLICY,
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#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY
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XFRM_MSG_GETPOLICY,
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#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY
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XFRM_MSG_ALLOCSPI,
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#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI
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XFRM_MSG_ACQUIRE,
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#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE
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XFRM_MSG_EXPIRE,
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#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE
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XFRM_MSG_UPDPOLICY,
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#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY
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XFRM_MSG_UPDSA,
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#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA
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XFRM_MSG_POLEXPIRE,
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#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE
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XFRM_MSG_FLUSHSA,
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#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA
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XFRM_MSG_FLUSHPOLICY,
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#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
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XFRM_MSG_NEWAE,
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#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE
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XFRM_MSG_GETAE,
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#define XFRM_MSG_GETAE XFRM_MSG_GETAE
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XFRM_MSG_REPORT,
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#define XFRM_MSG_REPORT XFRM_MSG_REPORT
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XFRM_MSG_MIGRATE,
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#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
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XFRM_MSG_NEWSADINFO,
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#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO
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XFRM_MSG_GETSADINFO,
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#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO
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XFRM_MSG_NEWSPDINFO,
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#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
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XFRM_MSG_GETSPDINFO,
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#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
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XFRM_MSG_MAPPING,
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#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
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__XFRM_MSG_MAX
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};
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#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
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#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)
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/*
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* Generic LSM security context for comunicating to user space
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* NOTE: Same format as sadb_x_sec_ctx
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*/
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struct xfrm_user_sec_ctx {
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__u16 len;
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__u16 exttype;
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__u8 ctx_alg; /* LSMs: e.g., selinux == 1 */
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__u8 ctx_doi;
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__u16 ctx_len;
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};
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struct xfrm_user_tmpl {
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struct xfrm_id id;
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__u16 family;
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xfrm_address_t saddr;
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__u32 reqid;
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__u8 mode;
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__u8 share;
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__u8 optional;
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__u32 aalgos;
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__u32 ealgos;
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__u32 calgos;
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};
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struct xfrm_encap_tmpl {
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__u16 encap_type;
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__be16 encap_sport;
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__be16 encap_dport;
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xfrm_address_t encap_oa;
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};
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/* AEVENT flags */
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enum xfrm_ae_ftype_t {
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XFRM_AE_UNSPEC,
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XFRM_AE_RTHR=1, /* replay threshold*/
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XFRM_AE_RVAL=2, /* replay value */
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XFRM_AE_LVAL=4, /* lifetime value */
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XFRM_AE_ETHR=8, /* expiry timer threshold */
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XFRM_AE_CR=16, /* Event cause is replay update */
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XFRM_AE_CE=32, /* Event cause is timer expiry */
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XFRM_AE_CU=64, /* Event cause is policy update */
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__XFRM_AE_MAX
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#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)
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};
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struct xfrm_userpolicy_type {
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__u8 type;
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__u16 reserved1;
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__u8 reserved2;
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};
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/* Netlink message attributes. */
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enum xfrm_attr_type_t {
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XFRMA_UNSPEC,
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XFRMA_ALG_AUTH, /* struct xfrm_algo */
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XFRMA_ALG_CRYPT, /* struct xfrm_algo */
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XFRMA_ALG_COMP, /* struct xfrm_algo */
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XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */
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XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */
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XFRMA_SA, /* struct xfrm_usersa_info */
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XFRMA_POLICY, /*struct xfrm_userpolicy_info */
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XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
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XFRMA_LTIME_VAL,
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XFRMA_REPLAY_VAL,
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XFRMA_REPLAY_THRESH,
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XFRMA_ETIMER_THRESH,
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XFRMA_SRCADDR, /* xfrm_address_t */
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XFRMA_COADDR, /* xfrm_address_t */
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XFRMA_LASTUSED, /* unsigned long */
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XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
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XFRMA_MIGRATE,
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XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
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XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
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XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
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XFRMA_MARK, /* struct xfrm_mark */
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XFRMA_TFCPAD, /* __u32 */
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XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */
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XFRMA_SA_EXTRA_FLAGS, /* __u32 */
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XFRMA_PROTO, /* __u8 */
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XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */
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XFRMA_PAD,
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XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */
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XFRMA_SET_MARK, /* __u32 */
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XFRMA_SET_MARK_MASK, /* __u32 */
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XFRMA_IF_ID, /* __u32 */
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__XFRMA_MAX
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#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
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#define XFRMA_MAX (__XFRMA_MAX - 1)
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};
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struct xfrm_mark {
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__u32 v; /* value */
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__u32 m; /* mask */
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};
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enum xfrm_sadattr_type_t {
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XFRMA_SAD_UNSPEC,
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XFRMA_SAD_CNT,
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XFRMA_SAD_HINFO,
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__XFRMA_SAD_MAX
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#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)
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};
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struct xfrmu_sadhinfo {
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__u32 sadhcnt; /* current hash bkts */
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__u32 sadhmcnt; /* max allowed hash bkts */
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};
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enum xfrm_spdattr_type_t {
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XFRMA_SPD_UNSPEC,
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XFRMA_SPD_INFO,
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XFRMA_SPD_HINFO,
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XFRMA_SPD_IPV4_HTHRESH,
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XFRMA_SPD_IPV6_HTHRESH,
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__XFRMA_SPD_MAX
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#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)
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};
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struct xfrmu_spdinfo {
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__u32 incnt;
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__u32 outcnt;
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__u32 fwdcnt;
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__u32 inscnt;
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__u32 outscnt;
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__u32 fwdscnt;
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};
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struct xfrmu_spdhinfo {
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__u32 spdhcnt;
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__u32 spdhmcnt;
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};
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struct xfrmu_spdhthresh {
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__u8 lbits;
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__u8 rbits;
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};
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struct xfrm_usersa_info {
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struct xfrm_selector sel;
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struct xfrm_id id;
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xfrm_address_t saddr;
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struct xfrm_lifetime_cfg lft;
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struct xfrm_lifetime_cur curlft;
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struct xfrm_stats stats;
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__u32 seq;
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__u32 reqid;
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__u16 family;
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__u8 mode; /* XFRM_MODE_xxx */
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__u8 replay_window;
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__u8 flags;
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#define XFRM_STATE_NOECN 1
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#define XFRM_STATE_DECAP_DSCP 2
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#define XFRM_STATE_NOPMTUDISC 4
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#define XFRM_STATE_WILDRECV 8
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#define XFRM_STATE_ICMP 16
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#define XFRM_STATE_AF_UNSPEC 32
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#define XFRM_STATE_ALIGN4 64
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#define XFRM_STATE_ESN 128
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};
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#define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1
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#define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2
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struct xfrm_usersa_id {
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xfrm_address_t daddr;
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__be32 spi;
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__u16 family;
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__u8 proto;
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};
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struct xfrm_aevent_id {
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struct xfrm_usersa_id sa_id;
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xfrm_address_t saddr;
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__u32 flags;
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__u32 reqid;
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};
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struct xfrm_userspi_info {
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struct xfrm_usersa_info info;
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__u32 min;
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__u32 max;
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};
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struct xfrm_userpolicy_info {
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struct xfrm_selector sel;
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struct xfrm_lifetime_cfg lft;
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struct xfrm_lifetime_cur curlft;
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__u32 priority;
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__u32 index;
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__u8 dir;
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__u8 action;
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#define XFRM_POLICY_ALLOW 0
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#define XFRM_POLICY_BLOCK 1
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__u8 flags;
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#define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */
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/* Automatically expand selector to include matching ICMP payloads. */
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#define XFRM_POLICY_ICMP 2
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__u8 share;
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};
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struct xfrm_userpolicy_id {
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struct xfrm_selector sel;
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__u32 index;
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__u8 dir;
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};
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struct xfrm_user_acquire {
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struct xfrm_id id;
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xfrm_address_t saddr;
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struct xfrm_selector sel;
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struct xfrm_userpolicy_info policy;
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__u32 aalgos;
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__u32 ealgos;
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__u32 calgos;
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__u32 seq;
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};
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struct xfrm_user_expire {
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struct xfrm_usersa_info state;
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__u8 hard;
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};
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struct xfrm_user_polexpire {
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struct xfrm_userpolicy_info pol;
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__u8 hard;
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};
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struct xfrm_usersa_flush {
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__u8 proto;
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};
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struct xfrm_user_report {
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__u8 proto;
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struct xfrm_selector sel;
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};
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/* Used by MIGRATE to pass addresses IKE should use to perform
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* SA negotiation with the peer */
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struct xfrm_user_kmaddress {
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xfrm_address_t local;
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xfrm_address_t remote;
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__u32 reserved;
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__u16 family;
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};
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struct xfrm_user_migrate {
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xfrm_address_t old_daddr;
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xfrm_address_t old_saddr;
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xfrm_address_t new_daddr;
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xfrm_address_t new_saddr;
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__u8 proto;
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__u8 mode;
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__u16 reserved;
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__u32 reqid;
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__u16 old_family;
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__u16 new_family;
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};
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struct xfrm_user_mapping {
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struct xfrm_usersa_id id;
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__u32 reqid;
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xfrm_address_t old_saddr;
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xfrm_address_t new_saddr;
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__be16 old_sport;
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__be16 new_sport;
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};
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struct xfrm_address_filter {
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xfrm_address_t saddr;
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xfrm_address_t daddr;
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__u16 family;
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__u8 splen;
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__u8 dplen;
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};
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struct xfrm_user_offload {
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int ifindex;
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__u8 flags;
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};
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/* This flag was exposed without any kernel code that supporting it.
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* Unfortunately, strongswan has the code that uses sets this flag,
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* which makes impossible to reuse this bit.
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*
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* So leave it here to make sure that it won't be reused by mistake.
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*/
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#define XFRM_OFFLOAD_IPV6 1
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#define XFRM_OFFLOAD_INBOUND 2
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#ifndef __KERNEL__
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/* backwards compatibility for userspace */
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#define XFRMGRP_ACQUIRE 1
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#define XFRMGRP_EXPIRE 2
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#define XFRMGRP_SA 4
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#define XFRMGRP_POLICY 8
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#define XFRMGRP_REPORT 0x20
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#endif
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enum xfrm_nlgroups {
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XFRMNLGRP_NONE,
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#define XFRMNLGRP_NONE XFRMNLGRP_NONE
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XFRMNLGRP_ACQUIRE,
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#define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE
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XFRMNLGRP_EXPIRE,
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#define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE
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XFRMNLGRP_SA,
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#define XFRMNLGRP_SA XFRMNLGRP_SA
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XFRMNLGRP_POLICY,
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#define XFRMNLGRP_POLICY XFRMNLGRP_POLICY
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XFRMNLGRP_AEVENTS,
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#define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
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XFRMNLGRP_REPORT,
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#define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
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XFRMNLGRP_MIGRATE,
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#define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
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XFRMNLGRP_MAPPING,
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#define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING
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__XFRMNLGRP_MAX
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};
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#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
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#endif /* _LINUX_XFRM_H */
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