[thirdparty/strongswan.git] / Source / charon / encoding / payloads / ike_header.c

/**
 * @file ike_header.c
 * 
 * @brief Declaration of the class ike_header_t. 
 * 
 * An object of this type represents an ike header and is used to 
 * generate and parse ike headers.
 * 
 */

/*
 * Copyright (C) 2005 Jan Hutter, Martin Willi
 * Hochschule fuer Technik Rapperswil
 *
 * 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 <http://www.fsf.org/copyleft/gpl.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.
 */

/* offsetof macro */
#include <stddef.h>

#include "ike_header.h"

#include <encoding/payloads/encodings.h>
#include <utils/allocator.h>

typedef struct private_ike_header_s private_ike_header_t;

struct private_ike_header_s {
	/**
	 * public interface
	 */
	ike_header_t public;
	
	/**
	 * SPI of the initiator
	 */
	u_int64_t initiator_spi;
	/**
	 * SPI of the responder
	 */
	u_int64_t responder_spi;
	/**
	 * next payload type
	 */
	u_int8_t  next_payload;
	/**
	 * IKE major version
	 */
	u_int8_t  maj_version;

	/**
	 * IKE minor version
	 */	
	u_int8_t  min_version;

	/**
	 * Exchange type 
	 */	
	u_int8_t  exchange_type;
	
	/**
	 * Flags of the Message
	 * 
	 */
	struct { 
		/**
		 * Sender is initiator of the associated IKE_SA_INIT-Exchange
		 */
		bool initiator;
		/**
		 * is protocol supporting higher version?
		 */
		bool version;
		/**
		 * TRUE, if this is a response, FALSE if its a Request
		 */
		bool response;
	} flags;
	/**
	 * Associated Message-ID
	 */
	u_int32_t message_id;
	/**
	 * Length of the whole IKEv2-Message (header and all payloads)
	 */
	u_int32_t length;	
}; 

/**
 * mappings used to get strings for exchange_type_t
 */
mapping_t exchange_type_m[] = {
	{EXCHANGE_TYPE_UNDEFINED, "EXCHANGE_TYPE_UNDEFINED"},
	{IKE_SA_INIT, "IKE_SA_INIT"},
	{IKE_AUTH, "IKE_AUTH"},
	{CREATE_CHILD_SA, "CREATE_CHILD_SA"},
	{INFORMATIONAL, "INFORMATIONAL"}
};


/**
 * Encoding rules to parse or generate a IKEv2-Header
 * 
 * The defined offsets are the positions in a object of type 
 * ike_header_t.
 * 
 */
encoding_rule_t ike_header_encodings[] = {
 	/* 8 Byte SPI, stored in the field initiator_spi */
	{ IKE_SPI,		offsetof(private_ike_header_t, initiator_spi)	},
 	/* 8 Byte SPI, stored in the field responder_spi */
	{ IKE_SPI,		offsetof(private_ike_header_t, responder_spi) 	},
 	/* 1 Byte next payload type, stored in the field next_payload */
	{ U_INT_8,		offsetof(private_ike_header_t, next_payload) 	},
 	/* 4 Bit major version, stored in the field maj_version */
	{ U_INT_4,		offsetof(private_ike_header_t, maj_version) 	},
 	/* 4 Bit minor version, stored in the field min_version */
	{ U_INT_4,		offsetof(private_ike_header_t, min_version) 	},
	/* 8 Bit for the exchange type */
	{ U_INT_8,		offsetof(private_ike_header_t, exchange_type) 	},
 	/* 2 Bit reserved bits, nowhere stored */
	{ RESERVED_BIT,	0 										}, 
	{ RESERVED_BIT,	0 										}, 
 	/* 3 Bit flags, stored in the fields response, version and initiator */
	{ FLAG,			offsetof(private_ike_header_t, flags.response) 	},	
	{ FLAG,			offsetof(private_ike_header_t, flags.version) 	},
	{ FLAG,			offsetof(private_ike_header_t, flags.initiator) },
 	/* 3 Bit reserved bits, nowhere stored */
	{ RESERVED_BIT,	0 										},
	{ RESERVED_BIT,	0 										},
	{ RESERVED_BIT,	0 										},
 	/* 4 Byte message id, stored in the field message_id */
	{ U_INT_32,		offsetof(private_ike_header_t, message_id) 		},
 	/* 4 Byte length fied, stored in the field length */
	{ HEADER_LENGTH,	offsetof(private_ike_header_t, length) 			}
};


/*                           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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                       IKE_SA Initiator's SPI                  !
      !                                                               !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                       IKE_SA Responder's SPI                  !
      !                                                               !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !  Next Payload ! MjVer ! MnVer ! Exchange Type !     Flags     !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                          Message ID                           !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                            Length                             !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/


/**
 * Implements payload_t's verify function.
 * See #payload_s.verify for description.
 */
static status_t verify(private_ike_header_t *this)
{
	if ((this->exchange_type < IKE_SA_INIT) || (this->exchange_type > INFORMATIONAL))
	{
		/* unsupported exchange type */
		return FAILED;
	}
	if (this->initiator_spi == 0)
	{
		/* initiator spi not set */
		return FAILED;
	}
	
	if ((this->responder_spi == 0) && (!this->flags.initiator))
	{
		/* must be original initiator*/
		return FAILED;
	}

	if ((this->responder_spi == 0) && (this->flags.response))
	{
		/* must be request*/
		return FAILED;
	}
	
	/* verification of version is not done in here */
	
	return SUCCESS;
}

/**
 * Implements payload_t's set_next_type function.
 * See #payload_s.set_next_type for description.
 */
static status_t set_next_type(payload_t *this,payload_type_t type)
{
	((private_ike_header_t *)this)->next_payload = type;
	return SUCCESS;
}
/**
 * Implements ike_header_t's get_initiator_spi fuction.
 * See #ike_header_t.get_initiator_spi  for description.
 */
static u_int64_t get_initiator_spi(private_ike_header_t *this)
{
	return this->initiator_spi;	
}

/**
 * Implements ike_header_t's set_initiator_spi fuction.
 * See #ike_header_t.set_initiator_spi  for description.
 */
static void set_initiator_spi(private_ike_header_t *this, u_int64_t initiator_spi)
{
	this->initiator_spi = initiator_spi;
}

/**
 * Implements ike_header_t's get_responder_spi fuction.
 * See #ike_header_t.get_responder_spi  for description.
 */
static u_int64_t get_responder_spi(private_ike_header_t *this)
{
	return this->responder_spi;	
}

/**
 * Implements ike_header_t's set_responder_spi fuction.
 * See #ike_header_t.set_responder_spi  for description.
 */
static void set_responder_spi(private_ike_header_t *this, u_int64_t responder_spi)
{
	this->responder_spi = responder_spi;
}

/**
 * Implements ike_header_t's get_maj_version fuction.
 * See #ike_header_t.get_maj_version  for description.
 */
static u_int8_t get_maj_version(private_ike_header_t *this)
{
	return this->maj_version;	
}

/**
 * Implements ike_header_t's get_min_version fuction.
 * See #ike_header_t.get_min_version  for description.
 */
static u_int8_t get_min_version(private_ike_header_t *this)
{
	return this->min_version;	
}

/**
 * Implements ike_header_t's get_response_flag fuction.
 * See #ike_header_t.get_response_flag  for description.
 */
static bool get_response_flag(private_ike_header_t *this)
{
	return this->flags.response;	
}

/**
 * Implements ike_header_t's set_response_flag fuction.
 * See #ike_header_t.set_response_flag  for description.
 */
static void set_response_flag(private_ike_header_t *this, bool response)
{
	this->flags.response = response;	
}

/**
 * Implements ike_header_t's get_version_flag fuction.
 * See #ike_header_t.get_version_flag  for description.
 */
static bool get_version_flag(private_ike_header_t *this)
{
	return this->flags.version;	
}

/**
 * Implements ike_header_t's get_initiator_flag fuction.
 * See #ike_header_t.get_initiator_flag  for description.
 */
static bool get_initiator_flag(private_ike_header_t *this)
{
	return this->flags.initiator;	
}

/**
 * Implements ike_header_t's set_initiator_flag fuction.
 * See #ike_header_t.set_initiator_flag  for description.
 */
static void set_initiator_flag(private_ike_header_t *this, bool initiator)
{
	this->flags.initiator = initiator;	
}

/**
 * Implements ike_header_t's get_exchange_type function
 * See #ike_header_t.get_exchange_type  for description.
 */
static u_int8_t get_exchange_type(private_ike_header_t *this)
{
	return this->exchange_type;	
}

/**
 * Implements ike_header_t's set_exchange_type function.
 * See #ike_header_t.set_exchange_type  for description.
 */
static void set_exchange_type(private_ike_header_t *this, u_int8_t exchange_type)
{
	this->exchange_type = exchange_type;	
}

/**
 * Implements ike_header_t's get_message_id function.
 * See #ike_header_t.get_message_id  for description.
 */
static u_int32_t get_message_id(private_ike_header_t *this)
{
	return this->message_id;	
}

/**
 * Implements ike_header_t's set_message_id function.
 * See #ike_header_t.set_message_id  for description.
 */
static void set_message_id(private_ike_header_t *this, u_int32_t message_id)
{
	this->message_id = message_id;
}

/**
 * Implements payload_t's and ike_header_t's destroy function.
 * See #payload_s.destroy or ike_header_s.destroy for description.
 */
static status_t destroy(ike_header_t *this)
{
	allocator_free(this);
	
	return SUCCESS;
}

/**
 * Implements payload_t's get_encoding_rules function.
 * See #payload_s.get_encoding_rules for description.
 */
static status_t get_encoding_rules(payload_t *this, encoding_rule_t **rules, size_t *rule_count)
{
	*rules = ike_header_encodings;
	*rule_count = sizeof(ike_header_encodings) / sizeof(encoding_rule_t);
	
	return SUCCESS;
}

/**
 * Implements payload_t's get_type function.
 * See #payload_s.get_type for description.
 */
static payload_type_t get_type(payload_t *this)
{
	return HEADER;
}

/**
 * Implements payload_t's get_next_type function.
 * See #payload_s.get_next_type for description.
 */
static payload_type_t get_next_type(payload_t *this)
{
	return (((private_ike_header_t*)this)->next_payload);
}

/**
 * Implements payload_t's get_length function.
 * See #payload_s.get_length for description.
 */
static size_t get_length(payload_t *this)
{
	return (((private_ike_header_t*)this)->length);
}

/*
 * Described in header
 */
ike_header_t *ike_header_create()
{
	private_ike_header_t *this = allocator_alloc_thing(private_ike_header_t);
	if (this == NULL)
	{
		return NULL;	
	}	
	
	this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
	this->public.payload_interface.get_encoding_rules = get_encoding_rules;
	this->public.payload_interface.get_length = get_length;
	this->public.payload_interface.get_next_type = get_next_type;
	this->public.payload_interface.set_next_type = set_next_type;
	this->public.payload_interface.get_type = get_type;
	this->public.payload_interface.destroy = (status_t (*) (payload_t *))destroy;
	this->public.destroy = destroy;
	
	this->public.get_initiator_spi = (u_int64_t (*) (ike_header_t*))get_initiator_spi;
	this->public.set_initiator_spi = (void (*) (ike_header_t*,u_int64_t))set_initiator_spi;
	this->public.get_responder_spi = (u_int64_t (*) (ike_header_t*))get_responder_spi;
	this->public.set_responder_spi = (void (*) (ike_header_t *,u_int64_t))set_responder_spi;
	this->public.get_maj_version = (u_int8_t (*) (ike_header_t*))get_maj_version;
	this->public.get_min_version = (u_int8_t (*) (ike_header_t*))get_min_version;
	this->public.get_response_flag = (bool (*) (ike_header_t*))get_response_flag;
	this->public.set_response_flag = (void (*) (ike_header_t*,bool))set_response_flag;
	this->public.get_version_flag = (bool (*) (ike_header_t*))get_version_flag;
	this->public.get_initiator_flag = (bool (*) (ike_header_t*))get_initiator_flag;
	this->public.set_initiator_flag = (void (*) (ike_header_t*,bool))set_initiator_flag;
	this->public.get_exchange_type = (u_int8_t (*) (ike_header_t*))get_exchange_type;
	this->public.set_exchange_type = (void (*) (ike_header_t*,u_int8_t))set_exchange_type;
	this->public.get_message_id = (u_int32_t (*) (ike_header_t*))get_message_id;
	this->public.set_message_id = (void (*) (ike_header_t*,u_int32_t))set_message_id;
	
	/* set default values of the fields */
	this->initiator_spi = 0;
	this->responder_spi = 0;
	this->next_payload = 0;
	this->maj_version = IKE_MAJOR_VERSION;
	this->min_version = IKE_MINOR_VERSION;
	this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
	this->flags.initiator = TRUE;
	this->flags.version = HIGHER_VERSION_SUPPORTED_FLAG;
	this->flags.response = FALSE;
	this->message_id = 0;
	this->length = IKE_HEADER_LENGTH;
	
	
	return (ike_header_t*)this;
}
Commit	Line	Data
c0211a29 MW	1	/**
	2	* @file ike_header.c
	3	*
63b200ab JH	4	* @brief Declaration of the class ike_header_t.
	5	*
	6	* An object of this type represents an ike header and is used to
	7	* generate and parse ike headers.
	8	*
c0211a29 MW	9	*/
	10
	11	/*
	12	* Copyright (C) 2005 Jan Hutter, Martin Willi
	13	* Hochschule fuer Technik Rapperswil
	14	*
	15	* This program is free software; you can redistribute it and/or modify it
	16	* under the terms of the GNU General Public License as published by the
	17	* Free Software Foundation; either version 2 of the License, or (at your
	18	* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
	19	*
	20	* This program is distributed in the hope that it will be useful, but
	21	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	22	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	23	* for more details.
	24	*/
	25
	26	/* offsetof macro */
	27	#include <stddef.h>
	28
cc0fbc3c MW	29	#include "ike_header.h"
cc0fbc3c MW	30
4a962238	31	#include <encoding/payloads/encodings.h>
696be022	32	#include <utils/allocator.h>
c0211a29	33
a9d0fa62 MW	34	typedef struct private_ike_header_s private_ike_header_t;
	35
	36	struct private_ike_header_s {
	37	/**
	38	* public interface
	39	*/
	40	ike_header_t public;
	41
	42	/**
	43	* SPI of the initiator
	44	*/
	45	u_int64_t initiator_spi;
	46	/**
	47	* SPI of the responder
	48	*/
	49	u_int64_t responder_spi;
	50	/**
	51	* next payload type
	52	*/
	53	u_int8_t next_payload;
	54	/**
	55	* IKE major version
	56	*/
	57	u_int8_t maj_version;
	58
	59	/**
	60	* IKE minor version
	61	*/
	62	u_int8_t min_version;
	63
	64	/**
	65	* Exchange type
	66	*/
	67	u_int8_t exchange_type;
	68
	69	/**
	70	* Flags of the Message
	71	*
	72	*/
	73	struct {
	74	/**
	75	* Sender is initiator of the associated IKE_SA_INIT-Exchange
	76	*/
	77	bool initiator;
	78	/**
	79	* is protocol supporting higher version?
	80	*/
	81	bool version;
	82	/**
	83	* TRUE, if this is a response, FALSE if its a Request
	84	*/
	85	bool response;
	86	} flags;
	87	/**
	88	* Associated Message-ID
	89	*/
	90	u_int32_t message_id;
	91	/**
	92	* Length of the whole IKEv2-Message (header and all payloads)
	93	*/
	94	u_int32_t length;
	95	};
02d3cba7 MW	96
	97	/**
	98	* mappings used to get strings for exchange_type_t
	99	*/
	100	mapping_t exchange_type_m[] = {
	101	{EXCHANGE_TYPE_UNDEFINED, "EXCHANGE_TYPE_UNDEFINED"},
	102	{IKE_SA_INIT, "IKE_SA_INIT"},
	103	{IKE_AUTH, "IKE_AUTH"},
	104	{CREATE_CHILD_SA, "CREATE_CHILD_SA"},
	105	{INFORMATIONAL, "INFORMATIONAL"}
	106	};
a9d0fa62 MW	107
a9d0fa62 MW	108
c0211a29 MW	109	/**
	110	* Encoding rules to parse or generate a IKEv2-Header
	111	*
0063dae5	112	* The defined offsets are the positions in a object of type
c0211a29 MW	113	* ike_header_t.
	114	*
	115	*/
	116	encoding_rule_t ike_header_encodings[] = {
	117	/* 8 Byte SPI, stored in the field initiator_spi */
cef4bce9	118	{ IKE_SPI, offsetof(private_ike_header_t, initiator_spi) },
c0211a29	119	/* 8 Byte SPI, stored in the field responder_spi */
cef4bce9	120	{ IKE_SPI, offsetof(private_ike_header_t, responder_spi) },
c0211a29	121	/* 1 Byte next payload type, stored in the field next_payload */
a9d0fa62	122	{ U_INT_8, offsetof(private_ike_header_t, next_payload) },
c0211a29	123	/* 4 Bit major version, stored in the field maj_version */
a9d0fa62	124	{ U_INT_4, offsetof(private_ike_header_t, maj_version) },
c0211a29	125	/* 4 Bit minor version, stored in the field min_version */
a9d0fa62	126	{ U_INT_4, offsetof(private_ike_header_t, min_version) },
c0211a29	127	/* 8 Bit for the exchange type */
a9d0fa62	128	{ U_INT_8, offsetof(private_ike_header_t, exchange_type) },
c0211a29 MW	129	/* 2 Bit reserved bits, nowhere stored */
	130	{ RESERVED_BIT, 0 },
	131	{ RESERVED_BIT, 0 },
	132	/* 3 Bit flags, stored in the fields response, version and initiator */
a9d0fa62 MW	133	{ FLAG, offsetof(private_ike_header_t, flags.response) },
	134	{ FLAG, offsetof(private_ike_header_t, flags.version) },
	135	{ FLAG, offsetof(private_ike_header_t, flags.initiator) },
c0211a29 MW	136	/* 3 Bit reserved bits, nowhere stored */
	137	{ RESERVED_BIT, 0 },
	138	{ RESERVED_BIT, 0 },
	139	{ RESERVED_BIT, 0 },
	140	/* 4 Byte message id, stored in the field message_id */
a9d0fa62	141	{ U_INT_32, offsetof(private_ike_header_t, message_id) },
c0211a29	142	/* 4 Byte length fied, stored in the field length */
a9d0fa62	143	{ HEADER_LENGTH, offsetof(private_ike_header_t, length) }
c0211a29 MW	144	};
c0211a29 MW	145
e31eb71e JH	146
	147	/* 1 2 3
	148	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
	149	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	150	! IKE_SA Initiator's SPI !
	151	! !
	152	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	153	! IKE_SA Responder's SPI !
	154	! !
	155	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	156	! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags !
	157	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	158	! Message ID !
	159	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	160	! Length !
	161	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	162	*/
	163
	164
	165	/**
	166	* Implements payload_t's verify function.
	167	* See #payload_s.verify for description.
	168	*/
	169	static status_t verify(private_ike_header_t *this)
	170	{
	171	if ((this->exchange_type < IKE_SA_INIT) \|\| (this->exchange_type > INFORMATIONAL))
	172	{
	173	/* unsupported exchange type */
	174	return FAILED;
	175	}
7b3d1389	176	if (this->initiator_spi == 0)
e31eb71e JH	177	{
	178	/* initiator spi not set */
	179	return FAILED;
	180	}
	181
7b3d1389 MW	182	if ((this->responder_spi == 0) && (!this->flags.initiator))
	183	{
	184	/* must be original initiator*/
	185	return FAILED;
	186	}
	187
	188	if ((this->responder_spi == 0) && (this->flags.response))
	189	{
	190	/* must be request*/
	191	return FAILED;
	192	}
	193
e31eb71e JH	194	/* verification of version is not done in here */
	195
	196	return SUCCESS;
	197	}
	198
2b9dd467	199	/**
32cbc7bc JH	200	* Implements payload_t's set_next_type function.
32cbc7bc JH	201	* See #payload_s.set_next_type for description.
2b9dd467	202	*/
32cbc7bc	203	static status_t set_next_type(payload_t *this,payload_type_t type)
2b9dd467	204	{
32cbc7bc JH	205	((private_ike_header_t *)this)->next_payload = type;
32cbc7bc JH	206	return SUCCESS;
2b9dd467	207	}
a9d0fa62 MW	208	/**
	209	* Implements ike_header_t's get_initiator_spi fuction.
	210	* See #ike_header_t.get_initiator_spi for description.
	211	*/
	212	static u_int64_t get_initiator_spi(private_ike_header_t *this)
	213	{
	214	return this->initiator_spi;
	215	}
	216
	217	/**
	218	* Implements ike_header_t's set_initiator_spi fuction.
	219	* See #ike_header_t.set_initiator_spi for description.
	220	*/
	221	static void set_initiator_spi(private_ike_header_t *this, u_int64_t initiator_spi)
	222	{
	223	this->initiator_spi = initiator_spi;
	224	}
	225
	226	/**
	227	* Implements ike_header_t's get_responder_spi fuction.
	228	* See #ike_header_t.get_responder_spi for description.
	229	*/
	230	static u_int64_t get_responder_spi(private_ike_header_t *this)
	231	{
	232	return this->responder_spi;
	233	}
	234
	235	/**
	236	* Implements ike_header_t's set_responder_spi fuction.
	237	* See #ike_header_t.set_responder_spi for description.
	238	*/
	239	static void set_responder_spi(private_ike_header_t *this, u_int64_t responder_spi)
	240	{
	241	this->responder_spi = responder_spi;
	242	}
	243
	244	/**
	245	* Implements ike_header_t's get_maj_version fuction.
	246	* See #ike_header_t.get_maj_version for description.
	247	*/
	248	static u_int8_t get_maj_version(private_ike_header_t *this)
	249	{
	250	return this->maj_version;
	251	}
	252
	253	/**
	254	* Implements ike_header_t's get_min_version fuction.
	255	* See #ike_header_t.get_min_version for description.
	256	*/
	257	static u_int8_t get_min_version(private_ike_header_t *this)
	258	{
	259	return this->min_version;
	260	}
	261
	262	/**
	263	* Implements ike_header_t's get_response_flag fuction.
	264	* See #ike_header_t.get_response_flag for description.
	265	*/
	266	static bool get_response_flag(private_ike_header_t *this)
	267	{
	268	return this->flags.response;
	269	}
	270
2b9dd467 JH	271	/**
	272	* Implements ike_header_t's set_response_flag fuction.
	273	* See #ike_header_t.set_response_flag for description.
	274	*/
	275	static void set_response_flag(private_ike_header_t *this, bool response)
	276	{
	277	this->flags.response = response;
	278	}
	279
a9d0fa62 MW	280	/**
	281	* Implements ike_header_t's get_version_flag fuction.
	282	* See #ike_header_t.get_version_flag for description.
	283	*/
	284	static bool get_version_flag(private_ike_header_t *this)
	285	{
	286	return this->flags.version;
	287	}
	288
	289	/**
	290	* Implements ike_header_t's get_initiator_flag fuction.
	291	* See #ike_header_t.get_initiator_flag for description.
	292	*/
	293	static bool get_initiator_flag(private_ike_header_t *this)
	294	{
	295	return this->flags.initiator;
	296	}
	297
2b9dd467 JH	298	/**
	299	* Implements ike_header_t's set_initiator_flag fuction.
	300	* See #ike_header_t.set_initiator_flag for description.
	301	*/
	302	static void set_initiator_flag(private_ike_header_t *this, bool initiator)
	303	{
	304	this->flags.initiator = initiator;
	305	}
	306
a9d0fa62 MW	307	/**
	308	* Implements ike_header_t's get_exchange_type function
	309	* See #ike_header_t.get_exchange_type for description.
	310	*/
	311	static u_int8_t get_exchange_type(private_ike_header_t *this)
	312	{
	313	return this->exchange_type;
	314	}
	315
	316	/**
	317	* Implements ike_header_t's set_exchange_type function.
	318	* See #ike_header_t.set_exchange_type for description.
	319	*/
	320	static void set_exchange_type(private_ike_header_t *this, u_int8_t exchange_type)
	321	{
	322	this->exchange_type = exchange_type;
	323	}
	324
	325	/**
	326	* Implements ike_header_t's get_message_id function.
	327	* See #ike_header_t.get_message_id for description.
	328	*/
	329	static u_int32_t get_message_id(private_ike_header_t *this)
	330	{
	331	return this->message_id;
	332	}
	333
	334	/**
	335	* Implements ike_header_t's set_message_id function.
	336	* See #ike_header_t.set_message_id for description.
	337	*/
	338	static void set_message_id(private_ike_header_t *this, u_int32_t message_id)
	339	{
	340	this->message_id = message_id;
	341	}
c0211a29	342
0063dae5 JH	343	/**
	344	* Implements payload_t's and ike_header_t's destroy function.
	345	* See #payload_s.destroy or ike_header_s.destroy for description.
	346	*/
1e8bb886	347	static status_t destroy(ike_header_t *this)
cc0fbc3c MW	348	{
	349	allocator_free(this);
	350
	351	return SUCCESS;
	352	}
0063dae5 JH	353
	354	/**
	355	* Implements payload_t's get_encoding_rules function.
	356	* See #payload_s.get_encoding_rules for description.
	357	*/
1e8bb886	358	static status_t get_encoding_rules(payload_t this, encoding_rule_t rules, size_t rule_count)
cc0fbc3c MW	359	{
	360	*rules = ike_header_encodings;
	361	*rule_count = sizeof(ike_header_encodings) / sizeof(encoding_rule_t);
	362
	363	return SUCCESS;
	364	}
	365
0063dae5 JH	366	/**
	367	* Implements payload_t's get_type function.
	368	* See #payload_s.get_type for description.
	369	*/
1e8bb886	370	static payload_type_t get_type(payload_t *this)
cc0fbc3c MW	371	{
	372	return HEADER;
	373	}
	374
0063dae5 JH	375	/**
	376	* Implements payload_t's get_next_type function.
	377	* See #payload_s.get_next_type for description.
	378	*/
1e8bb886	379	static payload_type_t get_next_type(payload_t *this)
cc0fbc3c	380	{
a9d0fa62	381	return (((private_ike_header_t*)this)->next_payload);
cc0fbc3c MW	382	}
cc0fbc3c MW	383
0063dae5 JH	384	/**
	385	* Implements payload_t's get_length function.
	386	* See #payload_s.get_length for description.
	387	*/
1e8bb886	388	static size_t get_length(payload_t *this)
cc0fbc3c	389	{
a9d0fa62	390	return (((private_ike_header_t*)this)->length);
cc0fbc3c MW	391	}
cc0fbc3c MW	392
0063dae5 JH	393	/*
	394	* Described in header
	395	*/
cc0fbc3c MW	396	ike_header_t *ike_header_create()
cc0fbc3c MW	397	{
a9d0fa62	398	private_ike_header_t *this = allocator_alloc_thing(private_ike_header_t);
cc0fbc3c MW	399	if (this == NULL)
	400	{
	401	return NULL;
	402	}
	403
e31eb71e	404	this->public.payload_interface.verify = (status_t () (payload_t ))verify;
a9d0fa62 MW	405	this->public.payload_interface.get_encoding_rules = get_encoding_rules;
	406	this->public.payload_interface.get_length = get_length;
	407	this->public.payload_interface.get_next_type = get_next_type;
32cbc7bc	408	this->public.payload_interface.set_next_type = set_next_type;
a9d0fa62 MW	409	this->public.payload_interface.get_type = get_type;
	410	this->public.payload_interface.destroy = (status_t () (payload_t ))destroy;
	411	this->public.destroy = destroy;
	412
	413	this->public.get_initiator_spi = (u_int64_t () (ike_header_t))get_initiator_spi;
	414	this->public.set_initiator_spi = (void () (ike_header_t,u_int64_t))set_initiator_spi;
	415	this->public.get_responder_spi = (u_int64_t () (ike_header_t))get_responder_spi;
	416	this->public.set_responder_spi = (void () (ike_header_t ,u_int64_t))set_responder_spi;
	417	this->public.get_maj_version = (u_int8_t () (ike_header_t))get_maj_version;
	418	this->public.get_min_version = (u_int8_t () (ike_header_t))get_min_version;
	419	this->public.get_response_flag = (bool () (ike_header_t))get_response_flag;
2b9dd467	420	this->public.set_response_flag = (void () (ike_header_t,bool))set_response_flag;
a9d0fa62 MW	421	this->public.get_version_flag = (bool () (ike_header_t))get_version_flag;
a9d0fa62 MW	422	this->public.get_initiator_flag = (bool () (ike_header_t))get_initiator_flag;
2b9dd467	423	this->public.set_initiator_flag = (void () (ike_header_t,bool))set_initiator_flag;
a9d0fa62 MW	424	this->public.get_exchange_type = (u_int8_t () (ike_header_t))get_exchange_type;
	425	this->public.set_exchange_type = (void () (ike_header_t,u_int8_t))set_exchange_type;
	426	this->public.get_message_id = (u_int32_t () (ike_header_t))get_message_id;
	427	this->public.set_message_id = (void () (ike_header_t,u_int32_t))set_message_id;
cc0fbc3c	428
0063dae5 JH	429	/* set default values of the fields */
	430	this->initiator_spi = 0;
	431	this->responder_spi = 0;
	432	this->next_payload = 0;
	433	this->maj_version = IKE_MAJOR_VERSION;
	434	this->min_version = IKE_MINOR_VERSION;
02d3cba7	435	this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
0063dae5 JH	436	this->flags.initiator = TRUE;
	437	this->flags.version = HIGHER_VERSION_SUPPORTED_FLAG;
	438	this->flags.response = FALSE;
	439	this->message_id = 0;
	440	this->length = IKE_HEADER_LENGTH;
	441
	442
a9d0fa62	443	return (ike_header_t*)this;
cc0fbc3c MW	444	}
	445
	446