Connection::Connection(QObject *parent)
: QTcpSocket(parent)
{
greetingMessage = tr("undefined");
username = tr("unknown");
state = Waiting;
currentDataType = Undefined;
numBytesForCurrentDataType = -1;
transferTimerId = 0;
isGreetingMessageSent = false;
QObject::connect(this, SIGNAL(readyRead()), this, SLOT(processReadyRead()));
QObject::connect(this, SIGNAL(connected()), this, SLOT(sendGreetingMessage()));
QObject::connect(this, SIGNAL(connected()), this, SLOT(sendGreetingMessage()));
}
void Connection::processReadyRead()
{
if (state == WaitingForGreeting)
{
if (!readProtocolHeader())
return;
if (currentDataType != Greeting)
{
abort();
return;
}
state = ReadingGreeting;
}
if (state == ReadingGreeting)
{
if (!hasEnoughData())
return;
buffer = read(numBytesForCurrentDataType);
if (buffer.size() != numBytesForCurrentDataType)
{
abort();
return;
}
username = QString(buffer) + '@' + peerAddress().toString() + ':' + QString::number(peerPort());
currentDataType = Undefined;
numBytesForCurrentDataType = 0;
buffer.clear();
if (!isValid())
{
abort();
return;
}
if (!isGreetingMessageSent)
sendGreetingMessage();
pingTimer.start();
pongTime.start();
state = ReadyForUse;
emit readyForUse();
}
do
{
if (currentDataType == Undefined)
{
if (!readProtocolHeader())
return;
}
if (!hasEnoughData())
return;
processData();
} while (bytesAvailable() > 0);
}
Connection::Connection(Identity identity, QObject *parent )
: QTcpSocket(parent)
{
m_currentDataType = Undefined;
m_transferTimerId = 0;
m_numBytesForCurrentDataType = -1;
m_identity = identity;
m_buffer.clear();
QObject::connect(this, SIGNAL(readyRead()), this, SLOT(processReadyRead()));
QObject::connect(this, SIGNAL(connected()), this, SLOT(sendGreetingMessage()));
}
// ChatConnection初始化和信号槽连接
ChatConnection::ChatConnection(QObject *parent) :
QTcpSocket(parent)
{
this->greetingMessage = QObject::tr("undefined");
this->userName = QObject::tr("unknown");
this->state = WaitingForGreeting;
this->currentDataType = UNDEFINED;
this->numBytesForCurrentDataType = -1;
this->transferTimerId = 0;
this->isGreetingMessageSent = false;
connect(this, SIGNAL(readyRead()), this, SLOT(processReadyRead()));
connect(this, SIGNAL(connected()), this, SLOT(sendGreetingMessage()));
connect(this, SIGNAL(disconnected()), this, SLOT(handleDisconnected()));
connect(this, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(handleSocketError(QAbstractSocket::SocketError)));
}
Connection::Connection(QObject *parent) :
QTcpSocket(parent)
{
greetingMessage = tr("undefined");
username = tr("unknown");
state = WaitingForGreeting;
currentDataType = Undefined;
numBytesForCurrentDataType = -1;
transferTimerId = 0;
isGreetingMessageSent = false;
pingTimer.setInterval(PingInterval);
QObject::connect(this, SIGNAL(readyRead()), this, SLOT(processReadyRead()));
QObject::connect(this, SIGNAL(disconnected()), &pingTimer, SLOT(stop()));
QObject::connect(&pingTimer, SIGNAL(timeout()), this, SLOT(sendPing()));
QObject::connect(this, SIGNAL(connected()), this, SLOT(sendGreetingMessage()));
}
void DkConnection::checkState() {
if (mState == WaitingForGreeting) {
if (mCurrentDataType != Greeting) {
abort();
return;
}
if (!hasEnoughData())
return;
mBuffer = read(mNumBytesForCurrentDataType);
if (mBuffer.size() != mNumBytesForCurrentDataType) {
abort();
return;
}
if (!isValid()) {
abort();
return;
}
if (!mIsGreetingMessageSent)
sendGreetingMessage(mCurrentTitle);
mState = ReadyForUse;
mPortOfPeer = peerPort(); // save peer port ... otherwise connections where this instance is server can not be removed from peerList
readGreetingMessage();
mBuffer.clear();
mNumBytesForCurrentDataType = 0;
mCurrentDataType = Undefined;
return;
}
if (mState==ReadyForUse && mCurrentDataType == startSynchronize) {
if (!hasEnoughData())
return;
mBuffer = read(mNumBytesForCurrentDataType);
if (mBuffer.size() != mNumBytesForCurrentDataType) {
abort();
return;
}
QDataStream ds(mBuffer);
QList<quint16> synchronizedPeersOfOtherInstance;
quint16 numberOfSynchronizedPeers;
ds >> numberOfSynchronizedPeers;
//qDebug() << "other client is sychronized with: ";
for (int i=0; i < numberOfSynchronizedPeers; i++) {
quint16 peerId;
ds >> peerId;
synchronizedPeersOfOtherInstance.push_back(peerId);
//qDebug() << peerId;
}
mCurrentDataType = Undefined;
mNumBytesForCurrentDataType = 0;
mBuffer.clear();
if (!isValid()) {
abort();
return;
}
mState = Synchronized;
if (!mIsSynchronizeMessageSent)
sendStartSynchronizeMessage();
mSynchronizedTimer->stop();
emit connectionStartSynchronize(synchronizedPeersOfOtherInstance, this);
return;
}
if (mState==Synchronized && mCurrentDataType == stopSynchronize) {
mState=ReadyForUse;
this->mIsSynchronizeMessageSent=false;
emit connectionStopSynchronize(this);
mBuffer = read(mNumBytesForCurrentDataType);
if (mBuffer.size() != mNumBytesForCurrentDataType) {
abort();
return;
}
mCurrentDataType = Undefined;
mNumBytesForCurrentDataType = 0;
mBuffer.clear();
return;
}
if (mCurrentDataType == GoodBye) {
//qDebug() << "received GoodBye from " << peerAddress() << ":" << peerPort();
emit connectionGoodBye(this);
mCurrentDataType = Undefined;
mNumBytesForCurrentDataType = 0;
mBuffer.clear();
abort();
return;
}
}
