ipsec-tools/racoon/isakmp.h

   1 /* $Id: isakmp.h,v 1.10 2005/01/29 16:34:25 vanhu Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _ISAKMP_H
  33 #define _ISAKMP_H
  34
  35 #include <sys/types.h>
  36 #include "racoon_types.h"
  37 #include "vmbuf.h"
  38 #include "isakmp_var.h"
  39
  40 /* refer to RFC 2408 */
  41
  42 /* must include <netinet/in.h> first. */
  43 /* must include "isakmp_var.h" first. */
  44
  45 #define INITIATOR       0       /* synonym sender */
  46 #define RESPONDER       1       /* synonym receiver */
  47
  48 #define GENERATE        1
  49 #define VALIDATE        0
  50
  51 /* 3.1 ISAKMP Header Format
  52          0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  53         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  54         !                          Initiator                            !
  55         !                            Cookie                             !
  56         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  57         !                          Responder                            !
  58         !                            Cookie                             !
  59         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  60         !  Next Payload ! MjVer ! MnVer ! Exchange Type !     Flags     !
  61         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  62         !                          Message ID                           !
  63         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  64         !                            Length                             !
  65         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  66 */
  67 struct isakmp {
  68         cookie_t i_ck;          /* Initiator Cookie */
  69         cookie_t r_ck;          /* Responder Cookie */
  70         u_int8_t np;            /* Next Payload Type */
  71         u_int8_t v;
  72         u_int8_t etype;         /* Exchange Type */
  73         u_int8_t flags;         /* Flags */
  74         u_int32_t msgid;
  75         u_int32_t len;          /* Length */
  76 } __attribute__((__packed__));
  77
  78 /* Next Payload Type */
  79 #define ISAKMP_NPTYPE_NONE      0       /* NONE*/
  80 #define ISAKMP_NPTYPE_SA        1       /* Security Association */
  81 #define ISAKMP_NPTYPE_P         2       /* Proposal */
  82 #define ISAKMP_NPTYPE_T         3       /* Transform */
  83 #define ISAKMP_NPTYPE_KE        4       /* Key Exchange */
  84 #define ISAKMP_NPTYPE_ID        5       /* Identification */
  85 #define ISAKMP_NPTYPE_CERT      6       /* Certificate */
  86 #define ISAKMP_NPTYPE_CR        7       /* Certificate Request */
  87 #define ISAKMP_NPTYPE_HASH      8       /* Hash */
  88 #define ISAKMP_NPTYPE_SIG       9       /* Signature */
  89 #define ISAKMP_NPTYPE_NONCE     10      /* Nonce */
  90 #define ISAKMP_NPTYPE_N         11      /* Notification */
  91 #define ISAKMP_NPTYPE_D         12      /* Delete */
  92 #define ISAKMP_NPTYPE_VID       13      /* Vendor ID */
  93 #define ISAKMP_NPTYPE_ATTR      14      /* Attribute */
  94
  95
  96 /* NAT-T draft-ietf-ipsec-nat-t-ike-05 and later */
  97 /* XXX conflicts with values assigned to RFC 3547 */
  98 #define ISAKMP_NPTYPE_NATD_BADDRAFT             15      /* NAT Discovery */
  99 #define ISAKMP_NPTYPE_NATOA_BADDRAFT    16      /* NAT Original Address */
 100
 101
 102 /* NAT-T RFC */
 103 #define ISAKMP_NPTYPE_NATD_RFC  20      /* NAT Discovery */
 104 #define ISAKMP_NPTYPE_NATOA_RFC 21      /* NAT Original Address */
 105
 106 /* NAT-T up to draft-ietf-ipsec-nat-t-ike-04 */
 107 #define ISAKMP_NPTYPE_NATD_DRAFT        130     /* NAT Discovery */
 108 #define ISAKMP_NPTYPE_NATOA_DRAFT       131     /* NAT Original Address */
 109
 110 /* Frag does not seems to be documented */
 111 #define ISAKMP_NPTYPE_FRAG      132     /* IKE fragmentation payload */
 112
 113 #define ISAKMP_NPTYPE_MAX       17
 114                         /*      128 - 255 Private Use */
 115
 116 /*
 117  * The following are valid when the Vendor ID is one of the
 118  * following:
 119  *
 120  *      MD5("A GSS-API Authentication Method for IKE")
 121  *      MD5("GSSAPI") (recognized by Windows 2000)
 122  *      MD5("MS NT5 ISAKMPOAKLEY") (sent by Windows 2000)
 123  *
 124  * See draft-ietf-ipsec-isakmp-gss-auth-06.txt.
 125  */
 126 #define ISAKMP_NPTYPE_GSS       129     /* GSS token */
 127
 128 #define ISAKMP_MAJOR_VERSION_IKEV1      1
 129 #define ISAKMP_MAJOR_VERSION_IKEV2      2
 130 #define ISAKMP_MINOR_VERSION    0
 131 #define ISAKMP_VERSION_NUMBER_IKEV1     0x10
 132 #define ISAKMP_VERSION_NUMBER_IKEV2     0x20
 133 #define ISAKMP_GETMAJORV(v)     (((v) & 0xf0) >> 4)
 134 #define ISAKMP_SETMAJORV(v, m)  ((v) = ((v) & 0x0f) | (((m) << 4) & 0xf0))
 135 #define ISAKMP_GETMINORV(v)     ((v) & 0x0f)
 136 #define ISAKMP_SETMINORV(v, m)  ((v) = ((v) & 0xf0) | ((m) & 0x0f))
 137
 138 /* Exchange Type */
 139 #define ISAKMP_ETYPE_NONE       0       /* NONE */
 140 #define ISAKMP_ETYPE_BASE       1       /* Base */
 141 #define ISAKMP_ETYPE_IDENT      2       /* Identity Proteciton */
 142 #define ISAKMP_ETYPE_AUTH       3       /* Authentication Only */
 143 #define ISAKMP_ETYPE_AGG        4       /* Aggressive */
 144 #define ISAKMP_ETYPE_INFO       5       /* Informational */
 145 #define ISAKMP_ETYPE_CFG        6       /* Mode config */
 146 /* Additional Exchange Type */
 147 #define ISAKMP_ETYPE_QUICK      32      /* Quick Mode */
 148 #define ISAKMP_ETYPE_NEWGRP     33      /* New group Mode */
 149 #define ISAKMP_ETYPE_ACKINFO    34      /* Acknowledged Informational */
 150
 151 /* Flags */
 152 #define ISAKMP_FLAG_E 0x01 /* Encryption Bit */
 153 #define ISAKMP_FLAG_C 0x02 /* Commit Bit */
 154 #define ISAKMP_FLAG_A 0x04 /* Authentication Only Bit */
 155
 156 /* 3.2 Payload Generic Header
 157          0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 158         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 159         ! Next Payload  !   RESERVED    !         Payload Length        !
 160         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 161 */
 162 struct isakmp_gen {
 163         u_int8_t np;            /* Next Payload */
 164         u_int8_t reserved;      /* RESERVED, unused, must set to 0 */
 165         u_int16_t len;          /* Payload Length */
 166 } __attribute__((__packed__));
 167
 168 /* 3.3 Data Attributes
 169          0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 170         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 171         !A!       Attribute Type        !    AF=0  Attribute Length     !
 172         !F!                             !    AF=1  Attribute Value      !
 173         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 174         .                   AF=0  Attribute Value                       .
 175         .                   AF=1  Not Transmitted                       .
 176         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 177 */
 178 struct isakmp_data {
 179         u_int16_t type;         /* defined by DOI-spec, and Attribute Format */
 180         u_int16_t lorv;         /* if f equal 1, Attribute Length */
 181                                 /* if f equal 0, Attribute Value */
 182         /* if f equal 1, Attribute Value */
 183 } __attribute__((__packed__));
 184 #define ISAKMP_GEN_TLV 0x0000
 185 #define ISAKMP_GEN_TV  0x8000
 186         /* mask for type of attribute format */
 187 #define ISAKMP_GEN_MASK 0x8000
 188
 189 #if 0
 190 /* MAY NOT be used, because of being defined in ipsec-doi. */
 191 /* 3.4 Security Association Payload */
 192 struct isakmp_pl_sa {
 193         struct isakmp_gen h;
 194         u_int32_t doi;          /* Domain of Interpretation */
 195         u_int32_t sit;          /* Situation */
 196 } __attribute__((__packed__));
 197 #endif
 198
 199 /* 3.5 Proposal Payload */
 200         /*
 201         The value of the next payload field MUST only contain the value "2"
 202         or "0".  If there are additional Proposal payloads in the message,
 203         then this field will be 2.  If the current Proposal payload is the
 204         last within the security association proposal, then this field will
 205         be 0.
 206         */
 207 struct isakmp_pl_p {
 208         struct isakmp_gen h;
 209         u_int8_t p_no;          /* Proposal # */
 210         u_int8_t proto_id;      /* Protocol */
 211         u_int8_t spi_size;      /* SPI Size */
 212         u_int8_t num_t;         /* Number of Transforms */
 213         /* SPI */
 214 } __attribute__((__packed__));
 215
 216 /* 3.6 Transform Payload */
 217         /*
 218         The value of the next payload field MUST only contain the value "3"
 219         or "0".  If there are additional Transform payloads in the proposal,
 220         then this field will be 3.  If the current Transform payload is the
 221         last within the proposal, then this field will be 0.
 222         */
 223 struct isakmp_pl_t {
 224         struct isakmp_gen h;
 225         u_int8_t t_no;          /* Transform # */
 226         u_int8_t t_id;          /* Transform-Id */
 227         u_int16_t reserved;     /* RESERVED2 */
 228         /* SA Attributes */
 229 } __attribute__((__packed__));
 230
 231 /* 3.7 Key Exchange Payload */
 232 struct isakmp_pl_ke {
 233         struct isakmp_gen h;
 234         /* Key Exchange Data */
 235 } __attribute__((__packed__));
 236
 237 #if 0
 238 /* NOTE: MUST NOT use because of being defined in ipsec-doi instead them. */
 239 /* 3.8 Identification Payload */
 240 struct isakmp_pl_id {
 241         struct isakmp_gen h;
 242         union {
 243                 u_int8_t id_type;       /* ID Type */
 244                 u_int32_t doi_data;     /* DOI Specific ID Data */
 245         } d;
 246         /* Identification Data */
 247 } __attribute__((__packed__));
 248 /* A.4 ISAKMP Identification Type Values */
 249 #define ISAKMP_ID_IPV4_ADDR             0
 250 #define ISAKMP_ID_IPV4_ADDR_SUBNET      1
 251 #define ISAKMP_ID_IPV6_ADDR             2
 252 #define ISAKMP_ID_IPV6_ADDR_SUBNET      3
 253 #endif
 254
 255 /* 3.9 Certificate Payload */
 256 struct isakmp_pl_cert {
 257         struct isakmp_gen h;
 258         /*
 259          * Encoding type of 1 octet follows immediately,
 260          * variable length CERT data follows encoding type.
 261          */
 262 } __attribute__((__packed__));
 263
 264 /* Certificate Type */
 265 #define ISAKMP_CERT_NONE        0
 266 #define ISAKMP_CERT_PKCS7       1
 267 #define ISAKMP_CERT_PGP         2
 268 #define ISAKMP_CERT_DNS         3
 269 #define ISAKMP_CERT_X509SIGN    4
 270 #define ISAKMP_CERT_X509KE      5
 271 #define ISAKMP_CERT_KERBEROS    6
 272 #define ISAKMP_CERT_CRL         7
 273 #define ISAKMP_CERT_ARL         8
 274 #define ISAKMP_CERT_SPKI        9
 275 #define ISAKMP_CERT_X509ATTR    10
 276 #define ISAKMP_CERT_PLAINRSA    11
 277
 278 /* the method to get peers certificate */
 279 #define ISAKMP_GETCERT_PAYLOAD          1
 280 #define ISAKMP_GETCERT_LOCALFILE        2
 281 #define ISAKMP_GETCERT_DNS              3
 282
 283 /* 3.10 Certificate Request Payload */
 284 struct isakmp_pl_cr {
 285         struct isakmp_gen h;
 286         u_int8_t num_cert; /* # Cert. Types */
 287         /*
 288         Certificate Types (variable length)
 289           -- Contains a list of the types of certificates requested,
 290           sorted in order of preference.  Each individual certificate
 291           type is 1 octet.  This field is NOT required.
 292         */
 293         /* # Certificate Authorities (1 octet) */
 294         /* Certificate Authorities (variable length) */
 295 } __attribute__((__packed__));
 296
 297 /* 3.11 Hash Payload */
 298 struct isakmp_pl_hash {
 299         struct isakmp_gen h;
 300         /* Hash Data */
 301 } __attribute__((__packed__));
 302
 303 /* 3.12 Signature Payload */
 304 struct isakmp_pl_sig {
 305         struct isakmp_gen h;
 306         /* Signature Data */
 307 } __attribute__((__packed__));
 308
 309 /* 3.13 Nonce Payload */
 310 struct isakmp_pl_nonce {
 311         struct isakmp_gen h;
 312         /* Nonce Data */
 313 } __attribute__((__packed__));
 314
 315 /* 3.14 Notification Payload */
 316 struct isakmp_pl_n {
 317         struct isakmp_gen h;
 318         u_int32_t doi;          /* Domain of Interpretation */
 319         u_int8_t proto_id;      /* Protocol-ID */
 320         u_int8_t spi_size;      /* SPI Size */
 321         u_int16_t type;         /* Notify Message Type */
 322         /* SPI */
 323         /* Notification Data */
 324 } __attribute__((__packed__));
 325
 326 /* 3.14.1 Notify Message Types */
 327 /* NOTIFY MESSAGES - ERROR TYPES */
 328 #define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE       1
 329 #define ISAKMP_NTYPE_DOI_NOT_SUPPORTED          2
 330 #define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED    3
 331 #define ISAKMP_NTYPE_INVALID_COOKIE             4
 332 #define ISAKMP_NTYPE_INVALID_MAJOR_VERSION      5
 333 #define ISAKMP_NTYPE_INVALID_MINOR_VERSION      6
 334 #define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE      7
 335 #define ISAKMP_NTYPE_INVALID_FLAGS              8
 336 #define ISAKMP_NTYPE_INVALID_MESSAGE_ID         9
 337 #define ISAKMP_NTYPE_INVALID_PROTOCOL_ID        10
 338 #define ISAKMP_NTYPE_INVALID_SPI                11
 339 #define ISAKMP_NTYPE_INVALID_TRANSFORM_ID       12
 340 #define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED   13
 341 #define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN         14
 342 #define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX        15
 343 #define ISAKMP_NTYPE_PAYLOAD_MALFORMED          16
 344 #define ISAKMP_NTYPE_INVALID_KEY_INFORMATION    17
 345 #define ISAKMP_NTYPE_INVALID_ID_INFORMATION     18
 346 #define ISAKMP_NTYPE_INVALID_CERT_ENCODING      19
 347 #define ISAKMP_NTYPE_INVALID_CERTIFICATE        20
 348 #define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX    21
 349 #define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY     22
 350 #define ISAKMP_NTYPE_INVALID_HASH_INFORMATION   23
 351 #define ISAKMP_NTYPE_AUTHENTICATION_FAILED      24
 352 #define ISAKMP_NTYPE_INVALID_SIGNATURE          25
 353 #define ISAKMP_NTYPE_ADDRESS_NOTIFICATION       26
 354 #define ISAKMP_NTYPE_NOTIFY_SA_LIFETIME         27
 355 #define ISAKMP_NTYPE_CERTIFICATE_UNAVAILABLE    28
 356 #define ISAKMP_NTYPE_UNSUPPORTED_EXCHANGE_TYPE  29
 357 #define ISAKMP_NTYPE_UNEQUAL_PAYLOAD_LENGTHS    30
 358 #define ISAKMP_NTYPE_MINERROR                   1
 359 #define ISAKMP_NTYPE_MAXERROR                   16383
 360 /* NOTIFY MESSAGES - STATUS TYPES */
 361 #define ISAKMP_NTYPE_CONNECTED                  16384
 362 /* 4.6.3 IPSEC DOI Notify Message Types */
 363 #define ISAKMP_NTYPE_RESPONDER_LIFETIME         24576
 364 #define ISAKMP_NTYPE_REPLAY_STATUS              24577
 365 #define ISAKMP_NTYPE_INITIAL_CONTACT            24578
 366
 367 /* DPD */
 368 #define ISAKMP_NTYPE_R_U_THERE                  36136
 369 #define ISAKMP_NTYPE_R_U_THERE_ACK              36137
 370
 371 #define ISAKMP_NTYPE_LOAD_BALANCE               40501
 372 #define ISAKMP_NTYPE_HEARTBEAT                  40503
 373
 374
 375 /* using only to log */
 376 #define ISAKMP_LOG_RETRY_LIMIT_REACHED          65530
 377
 378 /* XXX means internal error but it's not reserved by any drafts... */
 379 #define ISAKMP_INTERNAL_ERROR                   -1
 380
 381 /* 3.15 Delete Payload */
 382 struct isakmp_pl_d {
 383         struct isakmp_gen h;
 384         u_int32_t doi;          /* Domain of Interpretation */
 385         u_int8_t proto_id;      /* Protocol-Id */
 386         u_int8_t spi_size;      /* SPI Size */
 387         u_int16_t num_spi;      /* # of SPIs */
 388         /* SPI(es) */
 389 } __attribute__((__packed__));
 390
 391 /* natoa payload */
 392 struct isakmp_pl_natoa {
 393         struct isakmp_gen h;
 394         u_int8_t id_type;               /* address type */
 395         u_int8_t reserved1;             /* reserved */
 396         u_int16_t reserved2;    /* reserved */
 397         /* IP address */
 398 } __attribute__((__packed__));
 399
 400 typedef struct payload_list {
 401         struct payload_list     *next, *prev;
 402         vchar_t                 *payload;
 403         int                     payload_type;
 404 } payload_list_t;
 405
 406 typedef struct payload_list_head {
 407   int             num_payloads;
 408   payload_list_t *payloads;
 409 } payload_list_head_t;
 410
 411 /* See draft-ietf-ipsec-isakmp-mode-cfg-04.txt, 3.2 */
 412 struct isakmp_pl_attr {
 413         struct isakmp_gen h;
 414         u_int8_t type;          /* Exchange type */
 415         u_int8_t res2;
 416         u_int16_t id;           /* Per transaction id */
 417 } __attribute__((__packed__));
 418
 419 /* Exchange type */
 420 #define ISAKMP_CFG_REQUEST      1
 421 #define ISAKMP_CFG_REPLY        2
 422 #define ISAKMP_CFG_SET          3
 423 #define ISAKMP_CFG_ACK          4
 424
 425 /* IKE fragmentation payload */
 426 struct isakmp_frag {
 427         u_int16_t unknown0; /* Next Payload (1st u_int8_t) and RESERVED (2nd u_int8_t), both must set to 0 */
 428         u_int16_t len;
 429         u_int16_t unknown1;     /* fragid */
 430         u_int8_t index;
 431         u_int8_t flags;
 432 } __attribute__((__packed__));
 433
 434 /* flags */
 435 #define ISAKMP_FRAG_LAST        1
 436
 437 /* DPD R-U-THERE / R-U-THERE-ACK Payload */
 438 struct isakmp_pl_ru {
 439         struct isakmp_gen h;
 440         u_int32_t doi;          /* Domain of Interpretation */
 441         u_int8_t proto_id;      /* Protocol-Id */
 442         u_int8_t spi_size;      /* SPI Size */
 443         u_int16_t type;         /* Notify type */
 444         cookie_t  i_ck; /* Initiator Cookie */
 445         cookie_t r_ck;  /* Responder cookie*/
 446         u_int32_t data;         /* Notification data */
 447 } __attribute__((__packed__));
 448
 449 /* Load Balance Notification */
 450 struct isakmp_pl_lb {
 451         struct isakmp_gen h;
 452         u_int32_t doi;          /* Domain of Interpretation */
 453         u_int8_t proto_id;      /* Protocol-Id */
 454         u_int8_t spi_size;      /* SPI Size */
 455         u_int16_t type;         /* Notify type */
 456         cookie_t  i_ck;         /* Initiator Cookie */
 457         cookie_t r_ck;          /* Responder cookie*/
 458         u_int32_t address;      /* redirect address */
 459 } __attribute__((__packed__));
 460
 461 /* Responder-Lifetime Notification */
 462 struct isakmp_pl_resp_lifetime {
 463         struct isakmp_gen h;
 464         u_int32_t doi;          /* Domain of Interpretation */
 465         u_int8_t proto_id;      /* Protocol-Id */
 466         u_int8_t spi_size;      /* SPI Size */
 467         u_int16_t type;         /* Notify type */
 468     /* spi follows next */
 469     /* data follows next */
 470 } __attribute__((__packed__));
 471
 472 extern u_char i_ck0[];
 473 extern u_char r_ck0[];
 474
 475 #endif /* _ISAKMP_H */