void readyToRead()
{
bool gotPackets = false;
while (true) {
// Get size header (if not in progress)
if (-1 == inProgressSize) {
// We need a size header of sizeof(qint32)
if (sizeof(qint32) > (uint)dev->bytesAvailable()) {
if (gotPackets)
emit readyRead();
return; // no more data available
}
// Read size header
int read = dev->read((char *)&inProgressSize, sizeof(qint32));
Q_ASSERT(read == sizeof(qint32));
Q_UNUSED(read);
// Check sizing constraints
if (inProgressSize > maxPacketSize) {
QObject::disconnect(dev, SIGNAL(readyRead()),
this, SLOT(readyToRead()));
QObject::disconnect(dev, SIGNAL(aboutToClose()),
this, SLOT(aboutToClose()));
QObject::disconnect(dev, SIGNAL(bytesWritten(qint64)),
this, SLOT(bytesWritten(qint64)));
dev = 0;
emit invalidPacket();
return;
}
inProgressSize -= sizeof(qint32);
} else {
inProgress.append(dev->read(inProgressSize - inProgress.size()));
if (inProgressSize == inProgress.size()) {
// Packet has arrived!
packets.append(inProgress);
inProgressSize = -1;
inProgress.clear();
waitingForPacket = false;
gotPackets = true;
} else {
if (gotPackets)
emit readyRead();
return; // packet in progress is not yet complete
}
}
}
}
void readyToRead()
{
if(-1 == inProgressSize) {
// We need a size header of sizeof(qint32)
if(sizeof(qint32) > (uint)dev->bytesAvailable())
return;
// Read size header
int read = dev->read((char *)&inProgressSize, sizeof(qint32));
Q_ASSERT(read == sizeof(qint32));
Q_UNUSED(read);
// Check sizing constraints
if(inProgressSize > maxPacketSize) {
QObject::disconnect(dev, SIGNAL(readyRead()),
this, SLOT(readyToRead()));
QObject::disconnect(dev, SIGNAL(aboutToClose()),
this, SLOT(aboutToClose()));
QObject::disconnect(dev, SIGNAL(bytesWritten(qint64)),
this, SLOT(bytesWritten(qint64)));
dev = 0;
emit invalidPacket();
return;
}
inProgressSize -= sizeof(qint32);
// Need to get trailing data
readyToRead();
} else {
inProgress.append(dev->read(inProgressSize - inProgress.size()));
if(inProgressSize == inProgress.size()) {
// Packet has arrived!
packets.append(inProgress);
inProgressSize = -1;
inProgress.clear();
emit readyRead();
// Need to get trailing data
readyToRead();
}
}
}
