bsd/netinet/isakmp.h

   1 /*
   2  * Copyright (c) 2018 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*
  30  * RFC 2408 Internet Security Association and Key Management Protocol
  31  */
  32
  33 #ifndef _NETINET_ISAKMP_H_
  34 #define _NETINET_ISAKMP_H_
  35
  36 typedef u_char cookie_t[8];
  37 typedef u_char msgid_t[4];
  38
  39 /* 3.1 ISAKMP Header Format (IKEv1 and IKEv2)
  40  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
  41  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  42  !                          Initiator                            !
  43  !                            Cookie                             !
  44  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  45  !                          Responder                            !
  46  !                            Cookie                             !
  47  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  48  !  Next Payload ! MjVer ! MnVer ! Exchange Type !     Flags     !
  49  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  50  !                          Message ID                           !
  51  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  52  !                            Length                             !
  53  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  54  */
  55 struct isakmp {
  56         cookie_t i_ck;          /* Initiator Cookie */
  57         cookie_t r_ck;          /* Responder Cookie */
  58         uint8_t np;             /* Next Payload Type */
  59         uint8_t vers;
  60 #define ISAKMP_VERS_MAJOR       0xf0
  61 #define ISAKMP_VERS_MAJOR_SHIFT 4
  62 #define ISAKMP_VERS_MINOR       0x0f
  63 #define ISAKMP_VERS_MINOR_SHIFT 0
  64         uint8_t etype;          /* Exchange Type */
  65         uint8_t flags;          /* Flags */
  66         msgid_t msgid;
  67         uint32_t len;           /* Length */
  68 };
  69
  70 /* 3.2 Payload Generic Header
  71  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
  72  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  73  ! Next Payload  !   RESERVED    !         Payload Length        !
  74  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  75  */
  76 struct isakmp_gen {
  77         uint8_t  np;       /* Next Payload */
  78         uint8_t  critical; /* bit 7 - critical, rest is RESERVED */
  79         uint16_t len;      /* Payload Length */
  80 };
  81
  82 #endif /* _NETINET_ISAKMP_H_ */