/// <summary>
/// Enqueues the ASDU to the transmission queue.
/// </summary>
/// If an active connection exists the ASDU will be sent to the active client immediately. Otherwhise
/// the ASDU will be added to the transmission queue for later transmission.
/// <param name="asdu">ASDU to be sent</param>
public void EnqueueASDU(ASDU asdu)
{
if (enqueuedASDUs != null)
{
lock (enqueuedASDUs) {
if (oldestQueueEntry == -1)
{
oldestQueueEntry = 0;
latestQueueEntry = 0;
numberOfAsduInQueue = 1;
enqueuedASDUs [0].asdu.ResetFrame();
asdu.Encode(enqueuedASDUs [0].asdu, parameters);
enqueuedASDUs [0].entryTimestamp = SystemUtils.currentTimeMillis();
enqueuedASDUs [0].state = QueueEntryState.WAITING_FOR_TRANSMISSION;
}
else
{
latestQueueEntry = (latestQueueEntry + 1) % maxQueueSize;
if (latestQueueEntry == oldestQueueEntry)
{
oldestQueueEntry = (oldestQueueEntry + 1) % maxQueueSize;
}
else
{
numberOfAsduInQueue++;
}
enqueuedASDUs [latestQueueEntry].asdu.ResetFrame();
asdu.Encode(enqueuedASDUs [latestQueueEntry].asdu, parameters);
enqueuedASDUs [latestQueueEntry].entryTimestamp = SystemUtils.currentTimeMillis();
enqueuedASDUs [latestQueueEntry].state = QueueEntryState.WAITING_FOR_TRANSMISSION;
}
}
DebugLog("Queue contains " + numberOfAsduInQueue + " messages (oldest: " + oldestQueueEntry + " latest: " + latestQueueEntry + ")");
foreach (ServerConnection connection in allOpenConnections)
{
if (connection.IsActive)
{
connection.ASDUReadyToSend();
}
}
}
}
/// <summary>
/// 发送ASDU
/// </summary>
/// <param name="asdu"></param>
public void SendASDU(ASDU asdu)
{
Frame frame = new T104Frame();
asdu.Encode(frame, parameters);
//发送I帧
sendIMessage(frame);
}
public void EnqueueAsdu(ASDU asdu)
{
lock (enqueuedASDUs)
{
if (oldestQueueEntry == -1)
{
oldestQueueEntry = 0;
latestQueueEntry = 0;
numberOfAsduInQueue = 1;
enqueuedASDUs[0].asdu.ResetFrame();
asdu.Encode(enqueuedASDUs[0].asdu, parameters);
enqueuedASDUs[0].entryTimestamp = SystemUtils.currentTimeMillis();
enqueuedASDUs[0].state = QueueEntryState.WAITING_FOR_TRANSMISSION;
}
else
{
latestQueueEntry = (latestQueueEntry + 1) % maxQueueSize;
if (latestQueueEntry == oldestQueueEntry)
{
oldestQueueEntry = (oldestQueueEntry + 1) % maxQueueSize;
}
else
{
numberOfAsduInQueue++;
}
enqueuedASDUs[latestQueueEntry].asdu.ResetFrame();
asdu.Encode(enqueuedASDUs[latestQueueEntry].asdu, parameters);
enqueuedASDUs[latestQueueEntry].entryTimestamp = SystemUtils.currentTimeMillis();
enqueuedASDUs[latestQueueEntry].state = QueueEntryState.WAITING_FOR_TRANSMISSION;
}
}
DebugLog("Queue contains " + numberOfAsduInQueue + " messages (oldest: " + oldestQueueEntry + " latest: " + latestQueueEntry + ")");
}
private void SendASDUInternal(ASDU asdu)
{
if (isActive)
{
lock (waitingASDUsHighPrio) {
BufferFrame frame = new BufferFrame(new byte[256], 6);
asdu.Encode(frame, parameters);
waitingASDUsHighPrio.Enqueue(frame);
}
SendWaitingASDUs();
}
}
private int SendIMessage(ASDU asdu)
{
BufferFrame frame = new BufferFrame(new byte[260], 6); /* reserve space for ACPI */
asdu.Encode(frame, parameters);
byte[] buffer = frame.GetBuffer();
int msgSize = frame.GetMsgSize(); /* ACPI + ASDU */
buffer [0] = 0x68;
/* set size field */
buffer [1] = (byte)(msgSize - 2);
buffer [2] = (byte)((sendSequenceNumber % 128) * 2);
buffer [3] = (byte)(sendSequenceNumber / 128);
buffer [4] = (byte)((receiveSequenceNumber % 128) * 2);
buffer [5] = (byte)(receiveSequenceNumber / 128);
if (running)
{
socket.NoDelay = true;
socket.Send(buffer, msgSize, SocketFlags.None);
sendSequenceNumber = (sendSequenceNumber + 1) % 32768;
statistics.SentMsgCounter++;
unconfirmedReceivedIMessages = 0;
if (sentMessageHandler != null)
{
sentMessageHandler(sentMessageHandlerParameter, buffer, msgSize);
}
return(sendSequenceNumber);
}
else
{
if (lastException != null)
{
throw new ConnectionException(lastException.Message, lastException);
}
else
{
throw new ConnectionException("not connected", new SocketException(10057));
}
}
}
