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/*
* Copyright (C) 2015 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* HSR 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 "unknown_payload.h"
typedef struct private_unknown_payload_t private_unknown_payload_t;
/**
* Private data of an unknown_payload_t object.
*/
struct private_unknown_payload_t {
/**
* Public unknown_payload_t interface.
*/
unknown_payload_t public;
/**
* Type of this payload
*/
payload_type_t type;
/**
* Next payload type.
*/
uint8_t next_payload;
/**
* Critical flag.
*/
bool critical;
/**
* Reserved bits
*/
bool reserved[7];
/**
* Length of this payload.
*/
uint16_t payload_length;
/**
* The contained data.
*/
chunk_t data;
};
/**
* Encoding rules to parse an payload which is not further specified.
*
* The defined offsets are the positions in a object of type
* private_unknown_payload_t.
*
*/
static encoding_rule_t encodings[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_unknown_payload_t, next_payload) },
/* the critical bit */
{ FLAG, offsetof(private_unknown_payload_t, critical) },
/* 7 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[0]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[1]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[2]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[3]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[4]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[5]) },
{ RESERVED_BIT, offsetof(private_unknown_payload_t, reserved[6]) },
/* Length of the whole payload*/
{ PAYLOAD_LENGTH, offsetof(private_unknown_payload_t, payload_length) },
/* some unknown data bytes, length is defined in PAYLOAD_LENGTH */
{ CHUNK_DATA, offsetof(private_unknown_payload_t, data) },
};
/*
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 !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! !
~ Data of any type ~
! !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
METHOD(payload_t, verify, status_t,
private_unknown_payload_t *this)
{
return SUCCESS;
}
METHOD(payload_t, get_encoding_rules, int,
private_unknown_payload_t *this, encoding_rule_t **rules)
{
*rules = encodings;
return countof(encodings);
}
METHOD(payload_t, get_header_length, int,
private_unknown_payload_t *this)
{
return 4;
}
METHOD(payload_t, get_payload_type, payload_type_t,
private_unknown_payload_t *this)
{
return PL_UNKNOWN;
}
METHOD(unknown_payload_t, get_type, payload_type_t,
private_unknown_payload_t *this)
{
return this->type;
}
METHOD(payload_t, get_next_type, payload_type_t,
private_unknown_payload_t *this)
{
return this->next_payload;
}
METHOD(payload_t, set_next_type, void,
private_unknown_payload_t *this,payload_type_t type)
{
this->next_payload = type;
}
METHOD(payload_t, get_length, size_t,
private_unknown_payload_t *this)
{
return this->payload_length;
}
METHOD(unknown_payload_t, is_critical, bool,
private_unknown_payload_t *this)
{
return this->critical;
}
METHOD(unknown_payload_t, get_data, chunk_t,
private_unknown_payload_t *this)
{
return this->data;
}
METHOD2(payload_t, unknown_payload_t, destroy, void,
private_unknown_payload_t *this)
{
free(this->data.ptr);
free(this);
}
/*
* Described in header
*/
unknown_payload_t *unknown_payload_create(payload_type_t type)
{
private_unknown_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_payload_type,
.destroy = _destroy,
},
.is_critical = _is_critical,
.get_type = _get_type,
.get_data = _get_data,
.destroy = _destroy,
},
.next_payload = PL_NONE,
.payload_length = get_header_length(this),
.type = type,
);
return &this->public;
}
/*
* Described in header
*/
unknown_payload_t *unknown_payload_create_data(payload_type_t type,
bool critical, chunk_t data)
{
private_unknown_payload_t *this;
this = (private_unknown_payload_t*)unknown_payload_create(type);
this->data = data;
this->critical = critical;
this->payload_length = get_header_length(this) + data.len;
return &this->public;
}
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