The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net/pfkeyv2.h

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    1 /*      $FreeBSD$       */
    2 /*      $KAME: pfkeyv2.h,v 1.37 2003/09/06 05:15:43 itojun Exp $        */
    3 
    4 /*-
    5  * SPDX-License-Identifier: BSD-3-Clause
    6  *
    7  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the project nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  */
   34 
   35 /*
   36  * This file has been derived rfc 2367,
   37  * And added some flags of SADB_KEY_FLAGS_ as SADB_X_EXT_.
   38  *      sakane@ydc.co.jp
   39  */
   40 
   41 #ifndef _NET_PFKEYV2_H_
   42 #define _NET_PFKEYV2_H_
   43 
   44 /*
   45 This file defines structures and symbols for the PF_KEY Version 2
   46 key management interface. It was written at the U.S. Naval Research
   47 Laboratory. This file is in the public domain. The authors ask that
   48 you leave this credit intact on any copies of this file.
   49 */
   50 #ifndef __PFKEY_V2_H
   51 #define __PFKEY_V2_H 1
   52 
   53 #define PF_KEY_V2 2
   54 #define PFKEYV2_REVISION        199806L
   55 
   56 #define SADB_RESERVED    0
   57 #define SADB_GETSPI      1
   58 #define SADB_UPDATE      2
   59 #define SADB_ADD         3
   60 #define SADB_DELETE      4
   61 #define SADB_GET         5
   62 #define SADB_ACQUIRE     6
   63 #define SADB_REGISTER    7
   64 #define SADB_EXPIRE      8
   65 #define SADB_FLUSH       9
   66 #define SADB_DUMP        10
   67 #define SADB_X_PROMISC   11
   68 #define SADB_X_PCHANGE   12
   69 
   70 #define SADB_X_SPDUPDATE  13
   71 #define SADB_X_SPDADD     14
   72 #define SADB_X_SPDDELETE  15    /* by policy index */
   73 #define SADB_X_SPDGET     16
   74 #define SADB_X_SPDACQUIRE 17
   75 #define SADB_X_SPDDUMP    18
   76 #define SADB_X_SPDFLUSH   19
   77 #define SADB_X_SPDSETIDX  20
   78 #define SADB_X_SPDEXPIRE  21
   79 #define SADB_X_SPDDELETE2 22    /* by policy id */
   80 #define SADB_MAX          22
   81 
   82 struct sadb_msg {
   83   u_int8_t sadb_msg_version;
   84   u_int8_t sadb_msg_type;
   85   u_int8_t sadb_msg_errno;
   86   u_int8_t sadb_msg_satype;
   87   u_int16_t sadb_msg_len;
   88   u_int16_t sadb_msg_reserved;
   89   u_int32_t sadb_msg_seq;
   90   u_int32_t sadb_msg_pid;
   91 };
   92 
   93 struct sadb_ext {
   94   u_int16_t sadb_ext_len;
   95   u_int16_t sadb_ext_type;
   96 };
   97 
   98 struct sadb_sa {
   99   u_int16_t sadb_sa_len;
  100   u_int16_t sadb_sa_exttype;
  101   u_int32_t sadb_sa_spi;
  102   u_int8_t sadb_sa_replay;
  103   u_int8_t sadb_sa_state;
  104   u_int8_t sadb_sa_auth;
  105   u_int8_t sadb_sa_encrypt;
  106   u_int32_t sadb_sa_flags;
  107 };
  108 
  109 struct sadb_lifetime {
  110   u_int16_t sadb_lifetime_len;
  111   u_int16_t sadb_lifetime_exttype;
  112   u_int32_t sadb_lifetime_allocations;
  113   u_int64_t sadb_lifetime_bytes;
  114   u_int64_t sadb_lifetime_addtime;
  115   u_int64_t sadb_lifetime_usetime;
  116 };
  117 
  118 struct sadb_address {
  119   u_int16_t sadb_address_len;
  120   u_int16_t sadb_address_exttype;
  121   u_int8_t sadb_address_proto;
  122   u_int8_t sadb_address_prefixlen;
  123   u_int16_t sadb_address_reserved;
  124 };
  125 
  126 struct sadb_key {
  127   u_int16_t sadb_key_len;
  128   u_int16_t sadb_key_exttype;
  129   u_int16_t sadb_key_bits;
  130   u_int16_t sadb_key_reserved;
  131 };
  132 
  133 struct sadb_ident {
  134   u_int16_t sadb_ident_len;
  135   u_int16_t sadb_ident_exttype;
  136   u_int16_t sadb_ident_type;
  137   u_int16_t sadb_ident_reserved;
  138   u_int64_t sadb_ident_id;
  139 };
  140 
  141 struct sadb_sens {
  142   u_int16_t sadb_sens_len;
  143   u_int16_t sadb_sens_exttype;
  144   u_int32_t sadb_sens_dpd;
  145   u_int8_t sadb_sens_sens_level;
  146   u_int8_t sadb_sens_sens_len;
  147   u_int8_t sadb_sens_integ_level;
  148   u_int8_t sadb_sens_integ_len;
  149   u_int32_t sadb_sens_reserved;
  150 };
  151 
  152 struct sadb_prop {
  153   u_int16_t sadb_prop_len;
  154   u_int16_t sadb_prop_exttype;
  155   u_int8_t sadb_prop_replay;
  156   u_int8_t sadb_prop_reserved[3];
  157 };
  158 
  159 struct sadb_comb {
  160   u_int8_t sadb_comb_auth;
  161   u_int8_t sadb_comb_encrypt;
  162   u_int16_t sadb_comb_flags;
  163   u_int16_t sadb_comb_auth_minbits;
  164   u_int16_t sadb_comb_auth_maxbits;
  165   u_int16_t sadb_comb_encrypt_minbits;
  166   u_int16_t sadb_comb_encrypt_maxbits;
  167   u_int32_t sadb_comb_reserved;
  168   u_int32_t sadb_comb_soft_allocations;
  169   u_int32_t sadb_comb_hard_allocations;
  170   u_int64_t sadb_comb_soft_bytes;
  171   u_int64_t sadb_comb_hard_bytes;
  172   u_int64_t sadb_comb_soft_addtime;
  173   u_int64_t sadb_comb_hard_addtime;
  174   u_int64_t sadb_comb_soft_usetime;
  175   u_int64_t sadb_comb_hard_usetime;
  176 };
  177 
  178 struct sadb_supported {
  179   u_int16_t sadb_supported_len;
  180   u_int16_t sadb_supported_exttype;
  181   u_int32_t sadb_supported_reserved;
  182 };
  183 
  184 struct sadb_alg {
  185   u_int8_t sadb_alg_id;
  186   u_int8_t sadb_alg_ivlen;
  187   u_int16_t sadb_alg_minbits;
  188   u_int16_t sadb_alg_maxbits;
  189   u_int16_t sadb_alg_reserved;
  190 };
  191 
  192 struct sadb_spirange {
  193   u_int16_t sadb_spirange_len;
  194   u_int16_t sadb_spirange_exttype;
  195   u_int32_t sadb_spirange_min;
  196   u_int32_t sadb_spirange_max;
  197   u_int32_t sadb_spirange_reserved;
  198 };
  199 
  200 struct sadb_x_kmprivate {
  201   u_int16_t sadb_x_kmprivate_len;
  202   u_int16_t sadb_x_kmprivate_exttype;
  203   u_int32_t sadb_x_kmprivate_reserved;
  204 };
  205 
  206 /*
  207  * XXX Additional SA Extension.
  208  * mode: tunnel or transport
  209  * reqid: to make SA unique nevertheless the address pair of SA are same.
  210  *        Mainly it's for VPN.
  211  */
  212 struct sadb_x_sa2 {
  213   u_int16_t sadb_x_sa2_len;
  214   u_int16_t sadb_x_sa2_exttype;
  215   u_int8_t sadb_x_sa2_mode;
  216   u_int8_t sadb_x_sa2_reserved1;
  217   u_int16_t sadb_x_sa2_reserved2;
  218   u_int32_t sadb_x_sa2_sequence;        /* lowermost 32bit of sequence number */
  219   u_int32_t sadb_x_sa2_reqid;
  220 };
  221 
  222 /* XXX Policy Extension */
  223 struct sadb_x_policy {
  224   u_int16_t sadb_x_policy_len;
  225   u_int16_t sadb_x_policy_exttype;
  226   u_int16_t sadb_x_policy_type;         /* See policy type of ipsec.h */
  227   u_int8_t sadb_x_policy_dir;           /* direction, see ipsec.h */
  228   u_int8_t sadb_x_policy_scope;         /* scope, see ipsec.h */
  229   u_int32_t sadb_x_policy_id;
  230   u_int32_t sadb_x_policy_priority;
  231 #define sadb_x_policy_reserved  sadb_x_policy_scope
  232 /* Policy with ifnet scope uses priority field to store ifindex */
  233 #define sadb_x_policy_ifindex   sadb_x_policy_priority
  234 };
  235 _Static_assert(sizeof(struct sadb_x_policy) == 16, "struct size mismatch");
  236 
  237 /*
  238  * When policy_type == IPSEC, it is followed by some of
  239  * the ipsec policy request.
  240  * [total length of ipsec policy requests]
  241  *      = (sadb_x_policy_len * sizeof(uint64_t) - sizeof(struct sadb_x_policy))
  242  */
  243 
  244 /* XXX IPsec Policy Request Extension */
  245 /*
  246  * This structure is aligned 8 bytes.
  247  */
  248 struct sadb_x_ipsecrequest {
  249   u_int16_t sadb_x_ipsecrequest_len;    /* structure length in 64 bits. */
  250   u_int16_t sadb_x_ipsecrequest_proto;  /* See ipsec.h */
  251   u_int8_t sadb_x_ipsecrequest_mode;    /* See IPSEC_MODE_XX in ipsec.h. */
  252   u_int8_t sadb_x_ipsecrequest_level;   /* See IPSEC_LEVEL_XX in ipsec.h */
  253   u_int16_t sadb_x_ipsecrequest_reqid;  /* See ipsec.h */
  254 
  255   /*
  256    * followed by source IP address of SA, and immediately followed by
  257    * destination IP address of SA.  These encoded into two of sockaddr
  258    * structure without any padding.  Must set each sa_len exactly.
  259    * Each of length of the sockaddr structure are not aligned to 64bits,
  260    * but sum of x_request and addresses is aligned to 64bits.
  261    */
  262 };
  263 
  264 /* NAT-Traversal type, see RFC 3948 (and drafts). */
  265 struct sadb_x_nat_t_type {
  266   u_int16_t sadb_x_nat_t_type_len;
  267   u_int16_t sadb_x_nat_t_type_exttype;
  268   u_int8_t sadb_x_nat_t_type_type;
  269   u_int8_t sadb_x_nat_t_type_reserved[3];
  270 };
  271 _Static_assert(sizeof(struct sadb_x_nat_t_type) == 8, "struct size mismatch");
  272 
  273 /* NAT-Traversal source or destination port. */
  274 struct sadb_x_nat_t_port { 
  275   u_int16_t sadb_x_nat_t_port_len;
  276   u_int16_t sadb_x_nat_t_port_exttype;
  277   u_int16_t sadb_x_nat_t_port_port;
  278   u_int16_t sadb_x_nat_t_port_reserved;
  279 };
  280 _Static_assert(sizeof(struct sadb_x_nat_t_port) == 8, "struct size mismatch");
  281 
  282 /* ESP fragmentation size. */
  283 struct sadb_x_nat_t_frag {
  284   u_int16_t sadb_x_nat_t_frag_len;
  285   u_int16_t sadb_x_nat_t_frag_exttype;
  286   u_int16_t sadb_x_nat_t_frag_fraglen;
  287   u_int16_t sadb_x_nat_t_frag_reserved;
  288 };
  289 _Static_assert(sizeof(struct sadb_x_nat_t_frag) == 8, "struct size mismatch");
  290 
  291 /* Additional large replay window support
  292  */
  293 struct sadb_x_sa_replay {
  294   u_int16_t sadb_x_sa_replay_len;
  295   u_int16_t sadb_x_sa_replay_exttype;
  296   u_int32_t sadb_x_sa_replay_replay;    /* in packets */
  297 };
  298 _Static_assert(sizeof(struct sadb_x_sa_replay) == 8, "struct size mismatch");
  299 
  300 #define SADB_EXT_RESERVED             0
  301 #define SADB_EXT_SA                   1
  302 #define SADB_EXT_LIFETIME_CURRENT     2
  303 #define SADB_EXT_LIFETIME_HARD        3
  304 #define SADB_EXT_LIFETIME_SOFT        4
  305 #define SADB_EXT_ADDRESS_SRC          5
  306 #define SADB_EXT_ADDRESS_DST          6
  307 #define SADB_EXT_ADDRESS_PROXY        7
  308 #define SADB_EXT_KEY_AUTH             8
  309 #define SADB_EXT_KEY_ENCRYPT          9
  310 #define SADB_EXT_IDENTITY_SRC         10
  311 #define SADB_EXT_IDENTITY_DST         11
  312 #define SADB_EXT_SENSITIVITY          12
  313 #define SADB_EXT_PROPOSAL             13
  314 #define SADB_EXT_SUPPORTED_AUTH       14
  315 #define SADB_EXT_SUPPORTED_ENCRYPT    15
  316 #define SADB_EXT_SPIRANGE             16
  317 #define SADB_X_EXT_KMPRIVATE          17
  318 #define SADB_X_EXT_POLICY             18
  319 #define SADB_X_EXT_SA2                19
  320 #define SADB_X_EXT_NAT_T_TYPE         20
  321 #define SADB_X_EXT_NAT_T_SPORT        21
  322 #define SADB_X_EXT_NAT_T_DPORT        22
  323 #define SADB_X_EXT_NAT_T_OA           23        /* Deprecated. */
  324 #define SADB_X_EXT_NAT_T_OAI          23        /* Peer's NAT_OA for src of SA. */
  325 #define SADB_X_EXT_NAT_T_OAR          24        /* Peer's NAT_OA for dst of SA. */
  326 #define SADB_X_EXT_NAT_T_FRAG         25        /* Manual MTU override. */
  327 #define SADB_X_EXT_SA_REPLAY          26        /* Replay window override. */
  328 #define SADB_X_EXT_NEW_ADDRESS_SRC    27
  329 #define SADB_X_EXT_NEW_ADDRESS_DST    28
  330 #define SADB_EXT_MAX                  28
  331 
  332 #define SADB_SATYPE_UNSPEC      0
  333 #define SADB_SATYPE_AH          2
  334 #define SADB_SATYPE_ESP         3
  335 #define SADB_SATYPE_RSVP        5
  336 #define SADB_SATYPE_OSPFV2      6
  337 #define SADB_SATYPE_RIPV2       7
  338 #define SADB_SATYPE_MIP         8
  339 #define SADB_X_SATYPE_IPCOMP    9
  340 /*#define SADB_X_SATYPE_POLICY  10      obsolete, do not reuse */
  341 #define SADB_X_SATYPE_TCPSIGNATURE      11
  342 #define SADB_SATYPE_MAX         12
  343 
  344 #define SADB_SASTATE_LARVAL   0
  345 #define SADB_SASTATE_MATURE   1
  346 #define SADB_SASTATE_DYING    2
  347 #define SADB_SASTATE_DEAD     3
  348 #define SADB_SASTATE_MAX      3
  349 
  350 #define SADB_SAFLAGS_PFS      1
  351 
  352 /*
  353  * Though some of these numbers (both _AALG and _EALG) appear to be
  354  * IKEv2 numbers and others original IKE numbers, they have no meaning.
  355  * These are constants that the various IKE daemons use to tell the kernel
  356  * what cipher to use.
  357  *
  358  * Do not use these constants directly to decide which Transformation ID
  359  * to send.  You are responsible for mapping them yourself.
  360  */
  361 #define SADB_AALG_NONE          0
  362 #define SADB_AALG_MD5HMAC       2
  363 #define SADB_AALG_SHA1HMAC      3
  364 #define SADB_AALG_MAX           252
  365 #define SADB_X_AALG_SHA2_256    5
  366 #define SADB_X_AALG_SHA2_384    6
  367 #define SADB_X_AALG_SHA2_512    7
  368 #define SADB_X_AALG_RIPEMD160HMAC       8
  369 #define SADB_X_AALG_AES_XCBC_MAC        9       /* RFC3566 */
  370 #define SADB_X_AALG_AES128GMAC  11              /* RFC4543 + Errata1821 */
  371 #define SADB_X_AALG_AES192GMAC  12
  372 #define SADB_X_AALG_AES256GMAC  13
  373 #define SADB_X_AALG_MD5         249     /* Keyed MD5 */
  374 #define SADB_X_AALG_SHA         250     /* Keyed SHA */
  375 #define SADB_X_AALG_NULL        251     /* null authentication */
  376 #define SADB_X_AALG_TCP_MD5     252     /* Keyed TCP-MD5 (RFC2385) */
  377 
  378 #define SADB_EALG_NONE          0
  379 #define SADB_EALG_DESCBC        2
  380 #define SADB_EALG_3DESCBC       3
  381 #define SADB_X_EALG_CAST128CBC  6
  382 #define SADB_X_EALG_BLOWFISHCBC 7
  383 #define SADB_EALG_NULL          11
  384 #define SADB_X_EALG_RIJNDAELCBC 12
  385 #define SADB_X_EALG_AES         12
  386 #define SADB_X_EALG_AESCBC      12
  387 #define SADB_X_EALG_AESCTR      13
  388 #define SADB_X_EALG_AESGCM8     18      /* RFC4106 */
  389 #define SADB_X_EALG_AESGCM12    19
  390 #define SADB_X_EALG_AESGCM16    20
  391 #define SADB_X_EALG_CAMELLIACBC 22
  392 #define SADB_X_EALG_AESGMAC     23      /* RFC4543 + Errata1821 */
  393 #define SADB_EALG_MAX           23      /* !!! keep updated !!! */
  394 
  395 /* private allocations - based on RFC2407/IANA assignment */
  396 #define SADB_X_CALG_NONE        0
  397 #define SADB_X_CALG_OUI         1
  398 #define SADB_X_CALG_DEFLATE     2
  399 #define SADB_X_CALG_LZS         3
  400 #define SADB_X_CALG_MAX         4
  401 
  402 #define SADB_IDENTTYPE_RESERVED   0
  403 #define SADB_IDENTTYPE_PREFIX     1
  404 #define SADB_IDENTTYPE_FQDN       2
  405 #define SADB_IDENTTYPE_USERFQDN   3
  406 #define SADB_X_IDENTTYPE_ADDR     4
  407 #define SADB_IDENTTYPE_MAX        4
  408 
  409 /* `flags' in sadb_sa structure holds followings */
  410 #define SADB_X_EXT_NONE         0x0000  /* i.e. new format. */
  411 #define SADB_X_EXT_OLD          0x0001  /* old format. */
  412 
  413 #define SADB_X_EXT_IV4B         0x0010  /* IV length of 4 bytes in use */
  414 #define SADB_X_EXT_DERIV        0x0020  /* DES derived */
  415 #define SADB_X_EXT_CYCSEQ       0x0040  /* allowing to cyclic sequence. */
  416 
  417         /* three of followings are exclusive flags each them */
  418 #define SADB_X_EXT_PSEQ         0x0000  /* sequencial padding for ESP */
  419 #define SADB_X_EXT_PRAND        0x0100  /* random padding for ESP */
  420 #define SADB_X_EXT_PZERO        0x0200  /* zero padding for ESP */
  421 #define SADB_X_EXT_PMASK        0x0300  /* mask for padding flag */
  422 
  423 #if 1
  424 #define SADB_X_EXT_RAWCPI       0x0080  /* use well known CPI (IPComp) */
  425 #endif
  426 
  427 #define SADB_KEY_FLAGS_MAX      0x0fff
  428 
  429 /* SPI size for PF_KEYv2 */
  430 #define PFKEY_SPI_SIZE  sizeof(u_int32_t)
  431 
  432 /* Identifier for menber of lifetime structure */
  433 #define SADB_X_LIFETIME_ALLOCATIONS     0
  434 #define SADB_X_LIFETIME_BYTES           1
  435 #define SADB_X_LIFETIME_ADDTIME         2
  436 #define SADB_X_LIFETIME_USETIME         3
  437 
  438 /* The rate for SOFT lifetime against HARD one. */
  439 #define PFKEY_SOFT_LIFETIME_RATE        80
  440 
  441 /* Utilities */
  442 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
  443 #define PFKEY_EXTLEN(msg) \
  444         PFKEY_UNUNIT64(((struct sadb_ext *)(msg))->sadb_ext_len)
  445 #define PFKEY_ADDR_PREFIX(ext) \
  446         (((struct sadb_address *)(ext))->sadb_address_prefixlen)
  447 #define PFKEY_ADDR_PROTO(ext) \
  448         (((struct sadb_address *)(ext))->sadb_address_proto)
  449 #define PFKEY_ADDR_SADDR(ext) \
  450         ((struct sockaddr *)((caddr_t)(ext) + sizeof(struct sadb_address)))
  451 
  452 /* in 64bits */
  453 #define PFKEY_UNUNIT64(a)       ((a) << 3)
  454 #define PFKEY_UNIT64(a)         ((a) >> 3)
  455 
  456 #endif /* __PFKEY_V2_H */
  457 
  458 #endif /* _NET_PFKEYV2_H_ */

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