private void ProcessConnectionBuffer(ConnectionState state)
{
ISCSIConnectionReceiveBuffer buffer = state.ReceiveBuffer;
while (buffer.HasCompletePDU())
{
ISCSIPDU pdu = null;
try
{
pdu = buffer.DequeuePDU();
}
catch (Exception)
{
throw;
}
if (pdu.GetType() == typeof(ISCSIPDU))
{
throw new Exception("Unsupported");
}
else
{
ProcessPDU(pdu, state);
}
}
}
private void ProcessConnectionBuffer(ConnectionState state)
{
Socket clientSocket = state.ClientSocket;
ISCSIConnectionReceiveBuffer buffer = state.ReceiveBuffer;
while (buffer.HasCompletePDU())
{
ISCSIPDU pdu = null;
try
{
pdu = buffer.DequeuePDU();
}
catch (Exception ex)
{
byte[] pduBytes = buffer.DequeuePDUBytes();
Log(Severity.Error, "[{0}] Failed to read PDU (Exception: {1})", state.ConnectionIdentifier, ex.Message);
RejectPDU reject = new RejectPDU();
reject.Reason = RejectReason.InvalidPDUField;
reject.Data = ByteReader.ReadBytes(pduBytes, 0, 48);
state.SendQueue.Enqueue(reject);
}
if (pdu != null)
{
if (pdu.GetType() == typeof(ISCSIPDU))
{
Log(Severity.Error, "[{0}][ProcessCurrentBuffer] Unsupported PDU (0x{1})", state.ConnectionIdentifier, pdu.OpCode.ToString("X"));
// Unsupported PDU
RejectPDU reject = new RejectPDU();
reject.InitiatorTaskTag = pdu.InitiatorTaskTag;
reject.Reason = RejectReason.CommandNotSupported;
reject.Data = ByteReader.ReadBytes(pdu.GetBytes(), 0, 48);
state.SendQueue.Enqueue(reject);
}
else
{
bool valid = ValidateCommandNumbering(pdu, state);
if (valid)
{
ProcessPDU(pdu, state);
}
else
{
// We ignore this PDU
Log(Severity.Warning, "[{0}] Ignoring PDU with CmdSN outside of expected range", state.ConnectionIdentifier);
}
}
}
if (!clientSocket.Connected)
{
// Do not continue to process the buffer if the other side closed the connection
if (buffer.BytesInBuffer > 0)
{
Log(Severity.Debug, "[{0}] Buffer processing aborted, bytes left in receive buffer: {1}", state.ConnectionIdentifier, buffer.BytesInBuffer);
}
return;
}
}
}
