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/*
* Copyright (C) 2005-2010 Martin Willi
* Copyright (C) 2010 revosec AG
* Copyright (C) 2005 Jan Hutter
* 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.
*/
#include <stddef.h>
#include "cp_payload.h"
#include <encoding/payloads/encodings.h>
#include <collections/linked_list.h>
ENUM(config_type_names, CFG_REQUEST, CFG_ACK,
"CFG_REQUEST",
"CFG_REPLY",
"CFG_SET",
"CFG_ACK",
);
typedef struct private_cp_payload_t private_cp_payload_t;
/**
* Private data of an cp_payload_t object.
*/
struct private_cp_payload_t {
/**
* Public cp_payload_t interface.
*/
cp_payload_t public;
/**
* Next payload type.
*/
uint8_t next_payload;
/**
* Critical flag.
*/
bool critical;
/**
* Reserved bits
*/
bool reserved_bit[7];
/**
* Reserved bytes
*/
uint8_t reserved_byte[3];
/**
* Length of this payload.
*/
uint16_t payload_length;
/**
* Identifier field, IKEv1 only
*/
uint16_t identifier;
/**
* List of attributes, as configuration_attribute_t
*/
linked_list_t *attributes;
/**
* Config Type.
*/
uint8_t cfg_type;
/**
* PLV2_CONFIGURATION or PLV1_CONFIGURATION
*/
payload_type_t type;
};
/**
* Encoding rules to for an IKEv2 configuration payload
*/
static encoding_rule_t encodings_v2[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
/* the critical bit */
{ FLAG, offsetof(private_cp_payload_t, critical) },
/* 7 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
/* Length of the whole CP payload*/
{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
/* 3 reserved bytes */
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[1])},
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[2])},
/* list of configuration attributes in a list */
{ PAYLOAD_LIST + PLV2_CONFIGURATION_ATTRIBUTE,
offsetof(private_cp_payload_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 !C! RESERVED ! Payload Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! CFG Type ! RESERVED !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! !
~ Configuration Attributes ~
! !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/**
* Encoding rules to for an IKEv1 configuration payload
*/
static encoding_rule_t encodings_v1[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
/* the critical bit */
{ FLAG, offsetof(private_cp_payload_t, critical) },
/* 7 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
/* Length of the whole CP payload*/
{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
/* 1 reserved bytes */
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
{ U_INT_16, offsetof(private_cp_payload_t, identifier)},
/* list of configuration attributes in a list */
{ PAYLOAD_LIST + PLV1_CONFIGURATION_ATTRIBUTE,
offsetof(private_cp_payload_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_cp_payload_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, int,
private_cp_payload_t *this, encoding_rule_t **rules)
{
if (this->type == PLV2_CONFIGURATION)
{
*rules = encodings_v2;
return countof(encodings_v2);
}
*rules = encodings_v1;
return countof(encodings_v1);
}
METHOD(payload_t, get_header_length, int,
private_cp_payload_t *this)
{
return 8;
}
METHOD(payload_t, get_type, payload_type_t,
private_cp_payload_t *this)
{
return this->type;
}
METHOD(payload_t, get_next_type, payload_type_t,
private_cp_payload_t *this)
{
return this->next_payload;
}
METHOD(payload_t, set_next_type, void,
private_cp_payload_t *this,payload_type_t type)
{
this->next_payload = type;
}
/**
* recompute the length of the payload.
*/
static void compute_length(private_cp_payload_t *this)
{
enumerator_t *enumerator;
payload_t *attribute;
this->payload_length = get_header_length(this);
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_cp_payload_t *this)
{
return this->payload_length;
}
METHOD(cp_payload_t, create_attribute_enumerator, enumerator_t*,
private_cp_payload_t *this)
{
return this->attributes->create_enumerator(this->attributes);
}
METHOD(cp_payload_t, add_attribute, void,
private_cp_payload_t *this, configuration_attribute_t *attribute)
{
this->attributes->insert_last(this->attributes, attribute);
compute_length(this);
}
METHOD(cp_payload_t, get_config_type, config_type_t,
private_cp_payload_t *this)
{
return this->cfg_type;
}
METHOD(cp_payload_t, get_identifier, uint16_t,
private_cp_payload_t *this)
{
return this->identifier;
}
METHOD(cp_payload_t, set_identifier, void,
private_cp_payload_t *this, uint16_t identifier)
{
this->identifier = identifier;
}
METHOD2(payload_t, cp_payload_t, destroy, void,
private_cp_payload_t *this)
{
this->attributes->destroy_offset(this->attributes,
offsetof(configuration_attribute_t, destroy));
free(this);
}
/*
* Described in header.
*/
cp_payload_t *cp_payload_create_type(payload_type_t type, config_type_t cfg_type)
{
private_cp_payload_t *this;
INIT(this,
.public = {
.payload_interface = {
.verify = _verify,
.get_encoding_rules = _get_encoding_rules,
.get_header_length = _get_header_length,
.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,
.get_identifier = _get_identifier,
.set_identifier = _set_identifier,
.destroy = _destroy,
},
.next_payload = PL_NONE,
.payload_length = get_header_length(this),
.attributes = linked_list_create(),
.cfg_type = cfg_type,
.type = type,
);
return &this->public;
}
/*
* Described in header.
*/
cp_payload_t *cp_payload_create(payload_type_t type)
{
return cp_payload_create_type(type, CFG_REQUEST);
}
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