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/*
* Copyright (C) 2010 Sansar Choinyambuu
* 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 "pb_reason_string_msg.h"
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <utils/debug.h>
typedef struct private_pb_reason_string_msg_t private_pb_reason_string_msg_t;
/**
* PB-Language-Preference message (see section 4.11 of RFC 5793)
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reason String Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reason String (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Lang Code Len | Reason String Language Code (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/**
* Private data of a pb_reason_string_msg_t object.
*
*/
struct private_pb_reason_string_msg_t {
/**
* Public pb_reason_string_msg_t interface.
*/
pb_reason_string_msg_t public;
/**
* PB-TNC message type
*/
pen_type_t type;
/**
* Reason string
*/
chunk_t reason_string;
/**
* Language code
*/
chunk_t language_code;
/**
* Encoded message
*/
chunk_t encoding;
};
METHOD(pb_tnc_msg_t, get_type, pen_type_t,
private_pb_reason_string_msg_t *this)
{
return this->type;
}
METHOD(pb_tnc_msg_t, get_encoding, chunk_t,
private_pb_reason_string_msg_t *this)
{
return this->encoding;
}
METHOD(pb_tnc_msg_t, build, void,
private_pb_reason_string_msg_t *this)
{
bio_writer_t *writer;
if (this->encoding.ptr)
{
return;
}
writer = bio_writer_create(64);
writer->write_data32(writer, this->reason_string);
writer->write_data8 (writer, this->language_code);
this->encoding = writer->get_buf(writer);
this->encoding = chunk_clone(this->encoding);
writer->destroy(writer);
}
METHOD(pb_tnc_msg_t, process, status_t,
private_pb_reason_string_msg_t *this, uint32_t *offset)
{
bio_reader_t *reader;
reader = bio_reader_create(this->encoding);
if (!reader->read_data32(reader, &this->reason_string))
{
DBG1(DBG_TNC, "could not parse reason string");
reader->destroy(reader);
*offset = 0;
return FAILED;
};
this->reason_string = chunk_clone(this->reason_string);
if (this->reason_string.len &&
this->reason_string.ptr[this->reason_string.len-1] == '\0')
{
DBG1(DBG_TNC, "reason string must not be null terminated");
reader->destroy(reader);
*offset = 3 + this->reason_string.len;
return FAILED;
}
if (!reader->read_data8(reader, &this->language_code))
{
DBG1(DBG_TNC, "could not parse language code");
reader->destroy(reader);
*offset = 4 + this->reason_string.len;
return FAILED;
};
this->language_code = chunk_clone(this->language_code);
reader->destroy(reader);
if (this->language_code.len &&
this->language_code.ptr[this->language_code.len-1] == '\0')
{
DBG1(DBG_TNC, "language code must not be null terminated");
*offset = 4 + this->reason_string.len + this->language_code.len;
return FAILED;
}
return SUCCESS;
}
METHOD(pb_tnc_msg_t, destroy, void,
private_pb_reason_string_msg_t *this)
{
free(this->encoding.ptr);
free(this->reason_string.ptr);
free(this->language_code.ptr);
free(this);
}
METHOD(pb_reason_string_msg_t, get_reason_string, chunk_t,
private_pb_reason_string_msg_t *this)
{
return this->reason_string;
}
METHOD(pb_reason_string_msg_t, get_language_code, chunk_t,
private_pb_reason_string_msg_t *this)
{
return this->language_code;
}
/**
* See header
*/
pb_tnc_msg_t *pb_reason_string_msg_create_from_data(chunk_t data)
{
private_pb_reason_string_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_reason_string = _get_reason_string,
.get_language_code = _get_language_code,
},
.type = { PEN_IETF, PB_MSG_REASON_STRING },
.encoding = chunk_clone(data),
);
return &this->public.pb_interface;
}
/**
* See header
*/
pb_tnc_msg_t *pb_reason_string_msg_create(chunk_t reason_string,
chunk_t language_code)
{
private_pb_reason_string_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_reason_string = _get_reason_string,
.get_language_code = _get_language_code,
},
.type = { PEN_IETF, PB_MSG_REASON_STRING },
.reason_string = chunk_clone(reason_string),
.language_code = chunk_clone(language_code),
);
return &this->public.pb_interface;
}
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