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/*
* Copyright 2008 Ben Boeckel <MathStuf@gmail.com>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Header include
#include "Packet.h"
// Qt include
#include <QtCore/QtEndian>
#include <QtCore/QBuffer>
#include <QtCore/QIODevice>
Signet::Protocol::Packet::Packet(const Type type) :
m_type(type)
{
}
bool Signet::Protocol::Packet::determineType()
{
QByteArray temp = m_rawData;
QBuffer buffer(&temp);
int size = m_rawData.size();
union
{
char packetType_raw[2];
qint16 packetType;
};
union
{
char dataSize_raw[8];
qint64 dataSize;
};
union
{
char checksum_raw[2];
quint16 checksum;
};
if ((m_type == Invalid) && (6 <= size))
{
buffer.read(packetType_raw, 2);
buffer.read(dataSize_raw, 8);
buffer.read(checksum_raw, 2);
packetType = qFromBigEndian(packetType);
dataSize = qFromBigEndian(dataSize);
checksum = qFromBigEndian(checksum);
switch (packetType)
{
case RawData:
m_type = RawData;
break;
case Acceptance:
m_type = Acceptance;
break;
case Denial:
m_type = Denial;
break;
case Challenge:
m_type = Challenge;
break;
default:
m_type = Invalid;
break;
}
}
if (m_type == Invalid)
return false;
// TODO: verify the size
}
qint16 Signet::Protocol::Packet::type() const
{
return m_type;
}
bool Signet::Protocol::Packet::isValid() const
{
return m_type == Invalid;
}
void Signet::Protocol::Packet::write(const QByteArray& data)
{
if ((m_type == RawData) || (m_type == Invalid))
m_rawData.append(data);
}
void Signet::Protocol::Packet::rawDump(QIODevice* device) const
{
device->write(m_rawData);
}
void Signet::Protocol::Packet::dump(QIODevice* device) const
{
if (m_type == Invalid)
{
qCritical("Cannot send a packet of invalid type");
return;
}
union
{
char header[10];
struct
{
qint16 type;
qint64 size;
quint16 checksum;
}headerParts;
};
QByteArray data = m_rawData;
headerParts.type = qToBigEndian(m_type);
headerParts.size = qToBigEndian(m_rawData.size());
headerParts.checksum = qToBigEndian(qChecksum(m_rawData.data(), m_rawData.size()));
data.prepend(header);
device->write(data);
}
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