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/* format of ISAKMP message header
* Copyright (C) 2014 D. Hugh Redelmeier <hugh@mimosa.com>
* Copyright (C) 2019 Andrew Cagney <cagney@gnu.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/*
* This used to be part of packet.h.
* It is the only part used outside of Pluto (by ikeping).
* Breaking this out allows packet.h to be private to Pluto.
*/
#include "ike_spi.h"
/* ISAKMP Header: for all messages
* layout from RFC 2408 "ISAKMP" section 3.1
*
* NOTE: the IKEv2 header format is identical EXCEPT that the cookies are now
* called (IKE SA) SPIs. See RFC 5996 Figure 4.
*
* 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ! Initiator !
* ! Cookie !
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ! Responder !
* ! Cookie !
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags !
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ! Message ID !
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ! Length !
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define NSIZEOF_isakmp_hdr 28 /* on-the-wire sizeof struct isakmpg_hdr */
#define NSIZEOF_isakmp_generic 4 /* on-the-wire sizeof isakmp_generic) */
struct isakmp_hdr {
#define isa_ike_initiator_spi isa_ike_spis.initiator
#define isa_ike_responder_spi isa_ike_spis.responder
ike_spis_t isa_ike_spis;
uint8_t isa_np; /* Next payload */
uint8_t isa_version; /* high-order 4 bits: Major; low order 4: Minor */
uint8_t isa_xchg; /* Exchange type */
uint8_t isa_flags;
uint32_t isa_msgid; /* Message ID */
uint32_t isa_length; /* Length of message */
};
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