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#include <stddef.h>
#include "data_attribute_v1.h"
#include <encoding/payloads/encodings.h>
#include <library.h>
#include <daemon.h>
typedef struct private_data_attribute_v1_t private_data_attribute_v1_t;
/**
* Private data of an data_attribute_v1_t object.
*/
struct private_data_attribute_v1_t {
/**
* Public data_attribute_v1_t interface.
*/
data_attribute_v1_t public;
/**
* Reserved bit
*/
bool af_flag;
/**
* Type of the attribute.
*/
u_int16_t type;
/**
* Length of the attribute.
*/
u_int16_t length_or_value;
/**
* Attribute value as chunk.
*/
chunk_t value;
};
/**
* Encoding rules to parse or generate a configuration attribute.
*
* The defined offsets are the positions in a object of type
* private_data_attribute_v1_t.
*/
encoding_rule_t data_attribute_v1_encodings[] = {
/* AF Flag */
{ FLAG, offsetof(private_data_attribute_v1_t, af_flag)},
/* type of the attribute as 15 bit unsigned integer */
{ ATTRIBUTE_TYPE, offsetof(private_data_attribute_v1_t, type) },
/* Length of attribute value */
{ ATTRIBUTE_LENGTH_OR_VALUE, offsetof(private_data_attribute_v1_t, length_or_value) },
/* Value of attribute if attribute format flag is zero */
{ ATTRIBUTE_VALUE, offsetof(private_data_attribute_v1_t, value) }
};
/*
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!R| Attribute Type ! Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Value ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
METHOD(payload_t, verify, status_t,
private_data_attribute_v1_t *this)
{
bool failed = FALSE;
if (this->length_or_value != this->value.len)
{
DBG1(DBG_ENC, "invalid attribute length");
return FAILED;
}
switch (this->type)
{
case INTERNAL_IP4_ADDRESS:
case INTERNAL_IP4_NETMASK:
case INTERNAL_IP4_DNS:
case INTERNAL_IP4_NBNS:
case INTERNAL_ADDRESS_EXPIRY:
case INTERNAL_IP4_DHCP:
if (this->length_or_value != 0 && this->length_or_value != 4)
{
failed = TRUE;
}
break;
case INTERNAL_IP4_SUBNET:
if (this->length_or_value != 0 && this->length_or_value != 8)
{
failed = TRUE;
}
break;
case INTERNAL_IP6_ADDRESS:
case INTERNAL_IP6_SUBNET:
if (this->length_or_value != 0 && this->length_or_value != 17)
{
failed = TRUE;
}
break;
case INTERNAL_IP6_DNS:
case INTERNAL_IP6_NBNS:
case INTERNAL_IP6_DHCP:
if (this->length_or_value != 0 && this->length_or_value != 16)
{
failed = TRUE;
}
break;
case SUPPORTED_ATTRIBUTES:
if (this->length_or_value % 2)
{
failed = TRUE;
}
break;
case APPLICATION_VERSION:
/* any length acceptable */
break;
default:
DBG1(DBG_ENC, "unknown attribute type %N",
configuration_attribute_type_names, this->type);
break;
}
if (failed)
{
DBG1(DBG_ENC, "invalid attribute length %d for %N",
this->length_or_value, configuration_attribute_type_names, this->type);
return FAILED;
}
return SUCCESS;
}
METHOD(payload_t, get_encoding_rules, void,
private_data_attribute_v1_t *this, encoding_rule_t **rules,
size_t *rule_count)
{
*rules = data_attribute_v1_encodings;
*rule_count = countof(data_attribute_v1_encodings);
}
METHOD(payload_t, get_header_length, int,
private_data_attribute_v1_t *this)
{
return 4;
}
METHOD(payload_t, get_type, payload_type_t,
private_data_attribute_v1_t *this)
{
return DATA_ATTRIBUTE_V1;
}
METHOD(payload_t, get_next_type, payload_type_t,
private_data_attribute_v1_t *this)
{
return NO_PAYLOAD;
}
METHOD(payload_t, set_next_type, void,
private_data_attribute_v1_t *this, payload_type_t type)
{
}
METHOD(payload_t, get_length, size_t,
private_data_attribute_v1_t *this)
{
return get_header_length(this) + this->value.len;
}
METHOD(data_attribute_v1_t, get_dattr_type, configuration_attribute_type_t,
private_data_attribute_v1_t *this)
{
return this->type;
}
METHOD(data_attribute_v1_t, get_value, u_int16_t,
private_data_attribute_v1_t *this)
{
return this->length_or_value;
}
METHOD(data_attribute_v1_t, get_value_chunk, chunk_t,
private_data_attribute_v1_t *this)
{
return this->value;
}
METHOD2(payload_t, data_attribute_v1_t, destroy, void,
private_data_attribute_v1_t *this)
{
free(this->value.ptr);
free(this);
}
/*
* Described in header.
*/
data_attribute_v1_t *data_attribute_v1_create()
{
private_data_attribute_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,
},
.get_value_chunk = _get_value_chunk,
.get_type = _get_dattr_type,
.destroy = _destroy,
},
);
return &this->public;
}
/*
* Described in header.
*/
data_attribute_v1_t *data_attribute_v1_create_value(
configuration_attribute_type_t type, chunk_t value)
{
private_data_attribute_v1_t *this;
this = (private_data_attribute_v1_t*)data_attribute_v1_create();
this->type = ((u_int16_t)type) & 0x7FFF;
this->value = chunk_clone(value);
this->length_or_value = value.len;
this->af_flag = FALSE;
return &this->public;
}
/*
* Described in header.
*/
data_attribute_v1_t *data_attribute_v1_create_basic(
configuration_attribute_type_t type, u_int16_t value)
{
private_data_attribute_v1_t *this;
this = (private_data_attribute_v1_t*)data_attribute_v1_create();
this->type = ((u_int16_t)type) & 0x7FFF;
this->length_or_value = value;
this->af_flag = TRUE;
return &this->public;
}
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