public override IResponse receiveAnswer()
{
byte[] header = new byte[BinaryResponse.HEADER_LENTGH];
log.Info("recieving an answer...");
int n = port.Read(header, 0, BinaryResponse.HEADER_LENTGH);
if (n != BinaryResponse.HEADER_LENTGH)
{
// maybe wait for a while?
log.Info("error reading header from device!");
throw new InvalidDataException();
}
BinaryResponse.OP op = (BinaryResponse.OP)BitConverter.ToInt32(header, 0);
UInt32 dataLen = BitConverter.ToUInt32(header, 4);
BinaryResponse answer = BinaryResponse.newDeviceAnswer(op);
log.Info("got answer of type: " + op.ToString());
if (dataLen != 0)
{
byte[] data = new byte[dataLen];
n = port.Read(data, 0, (int)dataLen);
if (n != dataLen)
{
log.Info("could not read all the data, maybe add a loop?!");
throw new NotImplementedException();
}
answer.fromByteArray(header, data);
}
return(answer);
}
public override IResponse receiveAnswer()
{
try
{
byte[] header = new byte[BinaryResponse.HEADER_LENTGH];
log.Info("recieving an answer...");
int n = socket.Receive(header, BinaryResponse.HEADER_LENTGH, System.Net.Sockets.SocketFlags.None);
if (n != BinaryResponse.HEADER_LENTGH)
{
// maybe wait for a while?
log.Error("error reading header from device!");
throw new InvalidDataException();
}
BinaryResponse.OP op = (BinaryResponse.OP)BitConverter.ToInt32(header, 0);
UInt32 dataLen = BitConverter.ToUInt32(header, 4);
BinaryResponse answer = BinaryResponse.newDeviceAnswer(op);
if (answer == null)
{
throw new ArgumentNullException("error in response parsing, is the OPCODE missing? {" + op.ToString() + "}");
}
log.Info("got answer of type: " + op.ToString());
n = 0;
byte[] data = new byte[dataLen];
log.Info("data len: " + dataLen.ToString());
while (dataLen - n > 0)
{
n += socket.Receive(data, n, (int)(dataLen - n), System.Net.Sockets.SocketFlags.Partial);
log.Info("read " + n.ToString());
}
answer.fromByteArray(header, data);
return(answer);
} catch (Exception ex)
{
throw ex;
}
}
public override IResponse receiveAnswer(CancellationToken ct)
{
Queue dataQ = new Queue();
Byte [] b = new byte[1];
log.Info("recieving an answer...");
int n = 0;
bool fullMessage = false;
port.ReadTimeout = 1000;
while (!fullMessage)
{
/* check the cancellation token */
ct.ThrowIfCancellationRequested();
try
{
n = port.Read(b, 0, 1);
} catch (TimeoutException)
{
/* this is ok, continue to next iteration */
continue;
}
if (n > 0)
{
if (b[0] == CHAR_FLAG)
{
if (dataQ.Count > 1) /* op + crc */
{
fullMessage = true;
}
else
{
dataQ.Clear();
}
}
else
{
dataQ.Enqueue(b[0]);
}
}
}
byte[] data = new byte[dataQ.Count];
Array.Copy(dataQ.ToArray(), data, dataQ.Count);
log.Info("got: " + BitConverter.ToString(data).Replace("-", " "));
byte[] strippedData = restore_received_data(data);
if (strippedData == null)
{
log.Error("error in recieved bitstream!");
throw new RFC1662Exception();
}
BinaryResponse.OP op = (BinaryResponse.OP)strippedData[0];
BinaryResponse answer = BinaryResponse.newDeviceAnswer(op);
if (answer == null)
{
throw new UnknownOPException();
}
log.Info("got answer of type: " + op.ToString("X"));
answer.fromByteArray(strippedData);
return(answer);
}