void ServerConnection::queueFrame(quint32 frameNumber, QByteArray frameData)
{
Frame f(frameNumber, frameData);
// append to queue of this connection
m_frameQueue.append(f);
if( m_frameNumbersInFlight.size() < MAX_FRAMES_IN_FLIGHT )
{
sendData();
}
// we start dropping frames when the queue is at MAX_FRAME_QUEUE
// unless we are set to lossless, then we
// give the server a signal to throttle
if(m_frameQueue.size() > MAX_FRAME_QUEUE)
{
if( m_lossless )
{
if( !m_waiting )
{
m_waiting = true;
emit waitingOnClient(this, m_waiting);
}
}
else
{
// drop the oldest frame
Frame f = m_frameQueue.takeFirst();
qDebug() << "Connection " << m_tcpSocket->peerAddress().toString() << ":"
<< m_tcpSocket->peerPort() << " dropped frame " << f.serial;
}
}
emit scheduleSend();
}
void ServerConnection::queueFrame(quint32 frameNumber, QByteArray frameData)
{
if( m_tcpSocket == 0 )
return;
Frame f(frameNumber, frameData);
// append to queue of this connection
m_frameQueue.append(f);
if( m_frameNumbersInFlight.size() < m_maxFramesInFlight )
{
sendData();
}
// we start dropping frames when the queue is at m_maxFramesInQueue
// unless we are set to lossless, then we
// give the server a signal to throttle
// check if they are too old
/*if(m_frameQueue.size() > m_maxFramesInQueue)
{
while( m_frameQueue.size() > 0 )
{
const Frame& f = m_frameQueue.first();
if( f.time.elapsed() < 5000 )
break;
qWarning() << tr("Frame %1 timed out after %2 msecs.").arg(f.serial).arg(f.time.elapsed());
m_frameQueue.removeFirst();
}
}*/
if(m_frameQueue.size() > m_maxFramesInQueue)
{
if( m_lossless )
{
if( !m_waiting )
{
m_waiting = true;
emit waitingOnClient(this, m_waiting);
}
}
else
{
// drop the oldest frame
Frame f = m_frameQueue.takeFirst();
if (getAcknowledgeNeeded())
{
qDebug() << "Connection " << m_tcpSocket->peerAddress().toString() << ":"
<< m_tcpSocket->peerPort() << " dropped frame " << f.serial;
}
}
}
emit scheduleSend();
}
void ServerConnection::ackFrame(quint32 serial)
{
quint32 expectedSerial = m_frameNumbersInFlight.takeFirst();
if( expectedSerial != serial )
{
qWarning() << "Ack received for frame " << serial << " while expected frame " << expectedSerial << ".";
if( m_lossless && m_waiting )
{
m_waiting = false;
emit waitingOnClient(this, m_waiting);
}
}
}
void ServerConnection::ackFrame(quint32 serial)
{
if( m_frameNumbersInFlight.isEmpty() )
{
qWarning() << "Ignoring ack received for frame " << serial << " while no ack was expected.";
return;
}
quint32 expectedSerial = m_frameNumbersInFlight.first();
if( expectedSerial == serial )
{
m_frameNumbersInFlight.removeFirst();
}
else
{
qWarning() << "Ignoring ack received for frame " << serial << " while expected frame " << expectedSerial << ".";
}
if( m_lossless && m_waiting )
{
m_waiting = false;
emit waitingOnClient(this, m_waiting);
}
}
void ServerConnection::sendData()
{
if( m_tcpSocket == 0 ||
m_tcpSocket->state() != QAbstractSocket::ConnectedState )
{
return;
}
if( m_waiting )
return;
// if( m_tcpSocket->bytesToWrite() > MAX_BYTES_TO_WRITE )
// {
// m_waiting = true;
// emit waitingOnClient(this, m_waiting);
// return;
// }
bool overflow = false;
while(!( m_frameNumbersInFlight.size() >= m_maxFramesInFlight ||
m_frameQueue.isEmpty() ||
overflow ))
{
Frame& f = m_frameQueue.first();
if( f.sent == 0 )
{
qint64 bytesSent = m_tcpSocket->write(f.bytes);
if( bytesSent < f.bytes.size() )
{
if( bytesSent != -1 )
f.sent = bytesSent;
else
overflow = true;
}
else
{
m_frameNumbersInFlight.append(f.serial);
m_frameQueue.removeFirst();
}
}
else
{
const char* ptr = f.bytes.data();
ptr += f.sent;
qint64 len = f.bytes.size() - f.sent;
qint64 bytesSent = m_tcpSocket->write(ptr, len);
if( bytesSent < len )
{
if( bytesSent != -1 )
f.sent = f.sent + bytesSent;
else
overflow = true;
}
else
{
m_frameNumbersInFlight.append(f.serial);
m_frameQueue.removeFirst();
}
}
if( overflow )
{
m_waiting = true;
emit waitingOnClient(this, m_waiting);
}
}
}
