314 lines
6.2 KiB
C
314 lines
6.2 KiB
C
#ifndef _LINUX_XFRM_H
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#define _LINUX_XFRM_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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{
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__u32 a4;
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__u32 a6[4];
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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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{
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xfrm_address_t daddr;
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__u32 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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{
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xfrm_address_t daddr;
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xfrm_address_t saddr;
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__u16 dport;
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__u16 dport_mask;
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__u16 sport;
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__u16 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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uid_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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{
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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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{
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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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{
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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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struct xfrm_algo {
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char alg_name[64];
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int alg_key_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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{
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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_MAX = 3
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};
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enum
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{
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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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/* 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_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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__u16 encap_sport;
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__u16 encap_dport;
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xfrm_address_t encap_oa;
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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,
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XFRMA_POLICY,
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XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */
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__XFRMA_MAX
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#define XFRMA_MAX (__XFRMA_MAX - 1)
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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; /* 0=transport,1=tunnel */
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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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};
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struct xfrm_usersa_id {
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xfrm_address_t daddr;
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__u32 spi;
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__u16 family;
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__u8 proto;
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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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__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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#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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#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_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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