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#include <stddef.h>
#include "attribute_payload_v1.h"
#include <encoding/payloads/encodings.h>
#include <utils/linked_list.h>
ENUM(config_type_v1_names, ISAKMP_CFG_REQUEST, ISAKMP_CFG_ACK,
"ISAKMP_CFG_REQUEST",
"ISAKMP_CFG_REPLY",
"ISAKMP_CFG_SET",
"ISAKMP_CFG_ACK",
);
typedef struct private_attribute_payload_v1_t private_attribute_payload_v1_t;
/**
* Private data of an attribute_payload_v1_t object.
*/
struct private_attribute_payload_v1_t {
/**
* Public cp_payload_t interface.
*/
attribute_payload_v1_t public;
/**
* Next payload type.
*/
u_int8_t next_payload;
/**
* Length of this payload.
*/
u_int16_t payload_length;
/**
* List of attributes, as configuration_attribute_t
*/
linked_list_t *attributes;
/**
* Reserved bytes
*/
u_int8_t reserved_byte[2];
/**
* Identifier
*/
u_int16_t identifier;
/**
* Config Type.
*/
u_int8_t type;
};
/**
* Encoding rules to parse or generate a IKEv2-CP Payload
*
* The defined offsets are the positions in a object of type
* private_attribute_payload_v1_t.
*/
encoding_rule_t attribute_payload_v1_encodings[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_attribute_payload_v1_t, next_payload) },
/* reserved byte */
{ RESERVED_BYTE, offsetof(private_attribute_payload_v1_t, reserved_byte[0]) },
/* Length of the whole Attribute payload*/
{ PAYLOAD_LENGTH, offsetof(private_attribute_payload_v1_t, payload_length) },
/* Config type */
{ U_INT_8, offsetof(private_attribute_payload_v1_t, type) },
/* 3 reserved bytes */
{ RESERVED_BYTE, offsetof(private_attribute_payload_v1_t, reserved_byte[1])},
/* Identifier */
{ U_INT_16, offsetof(private_attribute_payload_v1_t, identifier)},
/* List of configuration attributes */
{ PAYLOAD_LIST + CONFIGURATION_ATTRIBUTE, offsetof(private_attribute_payload_v1_t, attributes) }
};
/*
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Next Payload ! RESERVED ! Payload Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! CFG Type ! RESERVED ! Identifier !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! !
~ Configuration Attributes ~
! !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
METHOD(payload_t, verify, status_t,
private_attribute_payload_v1_t *this)
{
status_t status = SUCCESS;
enumerator_t *enumerator;
payload_t *attribute;
enumerator = this->attributes->create_enumerator(this->attributes);
while (enumerator->enumerate(enumerator, &attribute))
{
status = attribute->verify(attribute);
if (status != SUCCESS)
{
break;
}
}
enumerator->destroy(enumerator);
return status;
}
METHOD(payload_t, get_encoding_rules, void,
private_attribute_payload_v1_t *this, encoding_rule_t **rules, size_t *rule_count)
{
*rules = attribute_payload_v1_encodings;
*rule_count = countof(attribute_payload_v1_encodings);
}
METHOD(payload_t, get_type, payload_type_t,
private_attribute_payload_v1_t *this)
{
return ATTRIBUTE_V1;
}
METHOD(payload_t, get_next_type, payload_type_t,
private_attribute_payload_v1_t *this)
{
return this->next_payload;
}
METHOD(payload_t, set_next_type, void,
private_attribute_payload_v1_t *this,payload_type_t type)
{
this->next_payload = type;
}
/**
* recompute the length of the payload.
*/
static void compute_length(private_attribute_payload_v1_t *this)
{
enumerator_t *enumerator;
payload_t *attribute;
this->payload_length = ATTRIBUTE_PAYLOAD_V1_HEADER_LENGTH;
enumerator = this->attributes->create_enumerator(this->attributes);
while (enumerator->enumerate(enumerator, &attribute))
{
this->payload_length += attribute->get_length(attribute);
}
enumerator->destroy(enumerator);
}
METHOD(payload_t, get_length, size_t,
private_attribute_payload_v1_t *this)
{
return this->payload_length;
}
METHOD(attribute_payload_v1_t, create_attribute_enumerator, enumerator_t*,
private_attribute_payload_v1_t *this)
{
return this->attributes->create_enumerator(this->attributes);
}
METHOD(attribute_payload_v1_t, add_attribute, void,
private_attribute_payload_v1_t *this, data_attribute_v1_t *attribute)
{
this->attributes->insert_last(this->attributes, attribute);
compute_length(this);
}
METHOD(attribute_payload_v1_t, get_config_type, config_type_v1_t,
private_attribute_payload_v1_t *this)
{
return this->type;
}
METHOD2(payload_t, attribute_payload_v1_t, destroy, void,
private_attribute_payload_v1_t *this)
{
this->attributes->destroy_offset(this->attributes,
offsetof(data_attribute_v1_t, destroy));
free(this);
}
/*
* Described in header.
*/
attribute_payload_v1_t *attribute_payload_v1_create_type(config_type_v1_t type)
{
private_attribute_payload_v1_t *this;
INIT(this,
.public = {
.payload_interface = {
.verify = _verify,
.get_encoding_rules = _get_encoding_rules,
.get_length = _get_length,
.get_next_type = _get_next_type,
.set_next_type = _set_next_type,
.get_type = _get_type,
.destroy = _destroy,
},
.create_attribute_enumerator = _create_attribute_enumerator,
.add_attribute = _add_attribute,
.get_type = _get_config_type,
.destroy = _destroy,
},
.next_payload = NO_PAYLOAD,
.payload_length = ATTRIBUTE_PAYLOAD_V1_HEADER_LENGTH,
.attributes = linked_list_create(),
.type = type,
);
return &this->public;
}
/*
* Described in header.
*/
attribute_payload_v1_t *attribute_payload_v1_create()
{
return attribute_payload_v1_create_type(ISAKMP_CFG_REQUEST);
}
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