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
36typedef u_char cookie_t[8];
37typedef 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 */
55struct 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 */
76struct 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_ */
83