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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _LINUX_XFRM_H3#define _LINUX_XFRM_H4 5#include <linux/in6.h>6#include <linux/types.h>7#include <linux/stddef.h>8 9/* All of the structures in this file may not change size as they are10 * passed into the kernel from userspace via netlink sockets.11 */12 13/* Structure to encapsulate addresses. I do not want to use14 * "standard" structure. My apologies.15 */16typedef union {17 __be32 a4;18 __be32 a6[4];19 struct in6_addr in6;20} xfrm_address_t;21 22/* Ident of a specific xfrm_state. It is used on input to lookup23 * the state by (spi,daddr,ah/esp) or to store information about24 * spi, protocol and tunnel address on output.25 */26struct xfrm_id {27 xfrm_address_t daddr;28 __be32 spi;29 __u8 proto;30};31 32struct xfrm_sec_ctx {33 __u8 ctx_doi;34 __u8 ctx_alg;35 __u16 ctx_len;36 __u32 ctx_sid;37 char ctx_str[] __counted_by(ctx_len);38};39 40/* Security Context Domains of Interpretation */41#define XFRM_SC_DOI_RESERVED 042#define XFRM_SC_DOI_LSM 143 44/* Security Context Algorithms */45#define XFRM_SC_ALG_RESERVED 046#define XFRM_SC_ALG_SELINUX 147 48/* Selector, used as selector both on policy rules (SPD) and SAs. */49 50struct xfrm_selector {51 xfrm_address_t daddr;52 xfrm_address_t saddr;53 __be16 dport;54 __be16 dport_mask;55 __be16 sport;56 __be16 sport_mask;57 __u16 family;58 __u8 prefixlen_d;59 __u8 prefixlen_s;60 __u8 proto;61 int ifindex;62 __kernel_uid32_t user;63};64 65#define XFRM_INF (~(__u64)0)66 67struct xfrm_lifetime_cfg {68 __u64 soft_byte_limit;69 __u64 hard_byte_limit;70 __u64 soft_packet_limit;71 __u64 hard_packet_limit;72 __u64 soft_add_expires_seconds;73 __u64 hard_add_expires_seconds;74 __u64 soft_use_expires_seconds;75 __u64 hard_use_expires_seconds;76};77 78struct xfrm_lifetime_cur {79 __u64 bytes;80 __u64 packets;81 __u64 add_time;82 __u64 use_time;83};84 85struct xfrm_replay_state {86 __u32 oseq;87 __u32 seq;88 __u32 bitmap;89};90 91#define XFRMA_REPLAY_ESN_MAX 409692 93struct xfrm_replay_state_esn {94 unsigned int bmp_len;95 __u32 oseq;96 __u32 seq;97 __u32 oseq_hi;98 __u32 seq_hi;99 __u32 replay_window;100 __u32 bmp[];101};102 103struct xfrm_algo {104 char alg_name[64];105 unsigned int alg_key_len; /* in bits */106 char alg_key[];107};108 109struct xfrm_algo_auth {110 char alg_name[64];111 unsigned int alg_key_len; /* in bits */112 unsigned int alg_trunc_len; /* in bits */113 char alg_key[];114};115 116struct xfrm_algo_aead {117 char alg_name[64];118 unsigned int alg_key_len; /* in bits */119 unsigned int alg_icv_len; /* in bits */120 char alg_key[];121};122 123struct xfrm_stats {124 __u32 replay_window;125 __u32 replay;126 __u32 integrity_failed;127};128 129enum {130 XFRM_POLICY_TYPE_MAIN = 0,131 XFRM_POLICY_TYPE_SUB = 1,132 XFRM_POLICY_TYPE_MAX = 2,133 XFRM_POLICY_TYPE_ANY = 255134};135 136enum {137 XFRM_POLICY_IN = 0,138 XFRM_POLICY_OUT = 1,139 XFRM_POLICY_FWD = 2,140 XFRM_POLICY_MASK = 3,141 XFRM_POLICY_MAX = 3142};143 144enum xfrm_sa_dir {145 XFRM_SA_DIR_IN = 1,146 XFRM_SA_DIR_OUT = 2147};148 149enum {150 XFRM_SHARE_ANY, /* No limitations */151 XFRM_SHARE_SESSION, /* For this session only */152 XFRM_SHARE_USER, /* For this user only */153 XFRM_SHARE_UNIQUE /* Use once */154};155 156#define XFRM_MODE_TRANSPORT 0157#define XFRM_MODE_TUNNEL 1158#define XFRM_MODE_ROUTEOPTIMIZATION 2159#define XFRM_MODE_IN_TRIGGER 3160#define XFRM_MODE_BEET 4161#define XFRM_MODE_MAX 5162 163/* Netlink configuration messages. */164enum {165 XFRM_MSG_BASE = 0x10,166 167 XFRM_MSG_NEWSA = 0x10,168#define XFRM_MSG_NEWSA XFRM_MSG_NEWSA169 XFRM_MSG_DELSA,170#define XFRM_MSG_DELSA XFRM_MSG_DELSA171 XFRM_MSG_GETSA,172#define XFRM_MSG_GETSA XFRM_MSG_GETSA173 174 XFRM_MSG_NEWPOLICY,175#define XFRM_MSG_NEWPOLICY XFRM_MSG_NEWPOLICY176 XFRM_MSG_DELPOLICY,177#define XFRM_MSG_DELPOLICY XFRM_MSG_DELPOLICY178 XFRM_MSG_GETPOLICY,179#define XFRM_MSG_GETPOLICY XFRM_MSG_GETPOLICY180 181 XFRM_MSG_ALLOCSPI,182#define XFRM_MSG_ALLOCSPI XFRM_MSG_ALLOCSPI183 XFRM_MSG_ACQUIRE,184#define XFRM_MSG_ACQUIRE XFRM_MSG_ACQUIRE185 XFRM_MSG_EXPIRE,186#define XFRM_MSG_EXPIRE XFRM_MSG_EXPIRE187 188 XFRM_MSG_UPDPOLICY,189#define XFRM_MSG_UPDPOLICY XFRM_MSG_UPDPOLICY190 XFRM_MSG_UPDSA,191#define XFRM_MSG_UPDSA XFRM_MSG_UPDSA192 193 XFRM_MSG_POLEXPIRE,194#define XFRM_MSG_POLEXPIRE XFRM_MSG_POLEXPIRE195 196 XFRM_MSG_FLUSHSA,197#define XFRM_MSG_FLUSHSA XFRM_MSG_FLUSHSA198 XFRM_MSG_FLUSHPOLICY,199#define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY200 201 XFRM_MSG_NEWAE,202#define XFRM_MSG_NEWAE XFRM_MSG_NEWAE203 XFRM_MSG_GETAE,204#define XFRM_MSG_GETAE XFRM_MSG_GETAE205 206 XFRM_MSG_REPORT,207#define XFRM_MSG_REPORT XFRM_MSG_REPORT208 209 XFRM_MSG_MIGRATE,210#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE211 212 XFRM_MSG_NEWSADINFO,213#define XFRM_MSG_NEWSADINFO XFRM_MSG_NEWSADINFO214 XFRM_MSG_GETSADINFO,215#define XFRM_MSG_GETSADINFO XFRM_MSG_GETSADINFO216 217 XFRM_MSG_NEWSPDINFO,218#define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO219 XFRM_MSG_GETSPDINFO,220#define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO221 222 XFRM_MSG_MAPPING,223#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING224 225 XFRM_MSG_SETDEFAULT,226#define XFRM_MSG_SETDEFAULT XFRM_MSG_SETDEFAULT227 XFRM_MSG_GETDEFAULT,228#define XFRM_MSG_GETDEFAULT XFRM_MSG_GETDEFAULT229 __XFRM_MSG_MAX230};231#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)232 233#define XFRM_NR_MSGTYPES (XFRM_MSG_MAX + 1 - XFRM_MSG_BASE)234 235/*236 * Generic LSM security context for communicating to user space237 * NOTE: Same format as sadb_x_sec_ctx238 */239struct xfrm_user_sec_ctx {240 __u16 len;241 __u16 exttype;242 __u8 ctx_alg; /* LSMs: e.g., selinux == 1 */243 __u8 ctx_doi;244 __u16 ctx_len;245};246 247struct xfrm_user_tmpl {248 struct xfrm_id id;249 __u16 family;250 xfrm_address_t saddr;251 __u32 reqid;252 __u8 mode;253 __u8 share;254 __u8 optional;255 __u32 aalgos;256 __u32 ealgos;257 __u32 calgos;258};259 260struct xfrm_encap_tmpl {261 __u16 encap_type;262 __be16 encap_sport;263 __be16 encap_dport;264 xfrm_address_t encap_oa;265};266 267/* AEVENT flags */268enum xfrm_ae_ftype_t {269 XFRM_AE_UNSPEC,270 XFRM_AE_RTHR=1, /* replay threshold*/271 XFRM_AE_RVAL=2, /* replay value */272 XFRM_AE_LVAL=4, /* lifetime value */273 XFRM_AE_ETHR=8, /* expiry timer threshold */274 XFRM_AE_CR=16, /* Event cause is replay update */275 XFRM_AE_CE=32, /* Event cause is timer expiry */276 XFRM_AE_CU=64, /* Event cause is policy update */277 __XFRM_AE_MAX278 279#define XFRM_AE_MAX (__XFRM_AE_MAX - 1)280};281 282struct xfrm_userpolicy_type {283 __u8 type;284 __u16 reserved1;285 __u8 reserved2;286};287 288/* Netlink message attributes. */289enum xfrm_attr_type_t {290 XFRMA_UNSPEC,291 XFRMA_ALG_AUTH, /* struct xfrm_algo */292 XFRMA_ALG_CRYPT, /* struct xfrm_algo */293 XFRMA_ALG_COMP, /* struct xfrm_algo */294 XFRMA_ENCAP, /* struct xfrm_algo + struct xfrm_encap_tmpl */295 XFRMA_TMPL, /* 1 or more struct xfrm_user_tmpl */296 XFRMA_SA, /* struct xfrm_usersa_info */297 XFRMA_POLICY, /*struct xfrm_userpolicy_info */298 XFRMA_SEC_CTX, /* struct xfrm_sec_ctx */299 XFRMA_LTIME_VAL,300 XFRMA_REPLAY_VAL,301 XFRMA_REPLAY_THRESH,302 XFRMA_ETIMER_THRESH,303 XFRMA_SRCADDR, /* xfrm_address_t */304 XFRMA_COADDR, /* xfrm_address_t */305 XFRMA_LASTUSED, /* __u64 */306 XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */307 XFRMA_MIGRATE,308 XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */309 XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */310 XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */311 XFRMA_MARK, /* struct xfrm_mark */312 XFRMA_TFCPAD, /* __u32 */313 XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_state_esn */314 XFRMA_SA_EXTRA_FLAGS, /* __u32 */315 XFRMA_PROTO, /* __u8 */316 XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */317 XFRMA_PAD,318 XFRMA_OFFLOAD_DEV, /* struct xfrm_user_offload */319 XFRMA_SET_MARK, /* __u32 */320 XFRMA_SET_MARK_MASK, /* __u32 */321 XFRMA_IF_ID, /* __u32 */322 XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */323 XFRMA_SA_DIR, /* __u8 */324 XFRMA_NAT_KEEPALIVE_INTERVAL, /* __u32 in seconds for NAT keepalive */325 __XFRMA_MAX326 327#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */328#define XFRMA_MAX (__XFRMA_MAX - 1)329};330 331struct xfrm_mark {332 __u32 v; /* value */333 __u32 m; /* mask */334};335 336enum xfrm_sadattr_type_t {337 XFRMA_SAD_UNSPEC,338 XFRMA_SAD_CNT,339 XFRMA_SAD_HINFO,340 __XFRMA_SAD_MAX341 342#define XFRMA_SAD_MAX (__XFRMA_SAD_MAX - 1)343};344 345struct xfrmu_sadhinfo {346 __u32 sadhcnt; /* current hash bkts */347 __u32 sadhmcnt; /* max allowed hash bkts */348};349 350enum xfrm_spdattr_type_t {351 XFRMA_SPD_UNSPEC,352 XFRMA_SPD_INFO,353 XFRMA_SPD_HINFO,354 XFRMA_SPD_IPV4_HTHRESH,355 XFRMA_SPD_IPV6_HTHRESH,356 __XFRMA_SPD_MAX357 358#define XFRMA_SPD_MAX (__XFRMA_SPD_MAX - 1)359};360 361struct xfrmu_spdinfo {362 __u32 incnt;363 __u32 outcnt;364 __u32 fwdcnt;365 __u32 inscnt;366 __u32 outscnt;367 __u32 fwdscnt;368};369 370struct xfrmu_spdhinfo {371 __u32 spdhcnt;372 __u32 spdhmcnt;373};374 375struct xfrmu_spdhthresh {376 __u8 lbits;377 __u8 rbits;378};379 380struct xfrm_usersa_info {381 struct xfrm_selector sel;382 struct xfrm_id id;383 xfrm_address_t saddr;384 struct xfrm_lifetime_cfg lft;385 struct xfrm_lifetime_cur curlft;386 struct xfrm_stats stats;387 __u32 seq;388 __u32 reqid;389 __u16 family;390 __u8 mode; /* XFRM_MODE_xxx */391 __u8 replay_window;392 __u8 flags;393#define XFRM_STATE_NOECN 1394#define XFRM_STATE_DECAP_DSCP 2395#define XFRM_STATE_NOPMTUDISC 4396#define XFRM_STATE_WILDRECV 8397#define XFRM_STATE_ICMP 16398#define XFRM_STATE_AF_UNSPEC 32399#define XFRM_STATE_ALIGN4 64400#define XFRM_STATE_ESN 128401};402 403#define XFRM_SA_XFLAG_DONT_ENCAP_DSCP 1404#define XFRM_SA_XFLAG_OSEQ_MAY_WRAP 2405 406struct xfrm_usersa_id {407 xfrm_address_t daddr;408 __be32 spi;409 __u16 family;410 __u8 proto;411};412 413struct xfrm_aevent_id {414 struct xfrm_usersa_id sa_id;415 xfrm_address_t saddr;416 __u32 flags;417 __u32 reqid;418};419 420struct xfrm_userspi_info {421 struct xfrm_usersa_info info;422 __u32 min;423 __u32 max;424};425 426struct xfrm_userpolicy_info {427 struct xfrm_selector sel;428 struct xfrm_lifetime_cfg lft;429 struct xfrm_lifetime_cur curlft;430 __u32 priority;431 __u32 index;432 __u8 dir;433 __u8 action;434#define XFRM_POLICY_ALLOW 0435#define XFRM_POLICY_BLOCK 1436 __u8 flags;437#define XFRM_POLICY_LOCALOK 1 /* Allow user to override global policy */438 /* Automatically expand selector to include matching ICMP payloads. */439#define XFRM_POLICY_ICMP 2440 __u8 share;441};442 443struct xfrm_userpolicy_id {444 struct xfrm_selector sel;445 __u32 index;446 __u8 dir;447};448 449struct xfrm_user_acquire {450 struct xfrm_id id;451 xfrm_address_t saddr;452 struct xfrm_selector sel;453 struct xfrm_userpolicy_info policy;454 __u32 aalgos;455 __u32 ealgos;456 __u32 calgos;457 __u32 seq;458};459 460struct xfrm_user_expire {461 struct xfrm_usersa_info state;462 __u8 hard;463};464 465struct xfrm_user_polexpire {466 struct xfrm_userpolicy_info pol;467 __u8 hard;468};469 470struct xfrm_usersa_flush {471 __u8 proto;472};473 474struct xfrm_user_report {475 __u8 proto;476 struct xfrm_selector sel;477};478 479/* Used by MIGRATE to pass addresses IKE should use to perform480 * SA negotiation with the peer */481struct xfrm_user_kmaddress {482 xfrm_address_t local;483 xfrm_address_t remote;484 __u32 reserved;485 __u16 family;486};487 488struct xfrm_user_migrate {489 xfrm_address_t old_daddr;490 xfrm_address_t old_saddr;491 xfrm_address_t new_daddr;492 xfrm_address_t new_saddr;493 __u8 proto;494 __u8 mode;495 __u16 reserved;496 __u32 reqid;497 __u16 old_family;498 __u16 new_family;499};500 501struct xfrm_user_mapping {502 struct xfrm_usersa_id id;503 __u32 reqid;504 xfrm_address_t old_saddr;505 xfrm_address_t new_saddr;506 __be16 old_sport;507 __be16 new_sport;508};509 510struct xfrm_address_filter {511 xfrm_address_t saddr;512 xfrm_address_t daddr;513 __u16 family;514 __u8 splen;515 __u8 dplen;516};517 518struct xfrm_user_offload {519 int ifindex;520 __u8 flags;521};522/* This flag was exposed without any kernel code that supports it.523 * Unfortunately, strongswan has the code that sets this flag,524 * which makes it impossible to reuse this bit.525 *526 * So leave it here to make sure that it won't be reused by mistake.527 */528#define XFRM_OFFLOAD_IPV6 1529#define XFRM_OFFLOAD_INBOUND 2530/* Two bits above are relevant for state path only, while531 * offload is used for both policy and state flows.532 *533 * In policy offload mode, they are free and can be safely reused.534 */535#define XFRM_OFFLOAD_PACKET 4536 537struct xfrm_userpolicy_default {538#define XFRM_USERPOLICY_UNSPEC 0539#define XFRM_USERPOLICY_BLOCK 1540#define XFRM_USERPOLICY_ACCEPT 2541 __u8 in;542 __u8 fwd;543 __u8 out;544};545 546#ifndef __KERNEL__547/* backwards compatibility for userspace */548#define XFRMGRP_ACQUIRE 1549#define XFRMGRP_EXPIRE 2550#define XFRMGRP_SA 4551#define XFRMGRP_POLICY 8552#define XFRMGRP_REPORT 0x20553#endif554 555enum xfrm_nlgroups {556 XFRMNLGRP_NONE,557#define XFRMNLGRP_NONE XFRMNLGRP_NONE558 XFRMNLGRP_ACQUIRE,559#define XFRMNLGRP_ACQUIRE XFRMNLGRP_ACQUIRE560 XFRMNLGRP_EXPIRE,561#define XFRMNLGRP_EXPIRE XFRMNLGRP_EXPIRE562 XFRMNLGRP_SA,563#define XFRMNLGRP_SA XFRMNLGRP_SA564 XFRMNLGRP_POLICY,565#define XFRMNLGRP_POLICY XFRMNLGRP_POLICY566 XFRMNLGRP_AEVENTS,567#define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS568 XFRMNLGRP_REPORT,569#define XFRMNLGRP_REPORT XFRMNLGRP_REPORT570 XFRMNLGRP_MIGRATE,571#define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE572 XFRMNLGRP_MAPPING,573#define XFRMNLGRP_MAPPING XFRMNLGRP_MAPPING574 __XFRMNLGRP_MAX575};576#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)577 578#endif /* _LINUX_XFRM_H */579