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xfrm.h
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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> /* 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[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; __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[0]; }; struct xfrm_algo { char alg_name[64]; unsigned int alg_key_len; /* in bits */ char alg_key[0]; }; 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[0]; }; 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[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, 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, /* unsigned long */ 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 supporting it. * Unfortunately, strongswan has the code that uses sets this flag, * which makes 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 */