public override void SendPacket(T packet)
{
byte[] binary = packetConverter.ToBinary(packet);
byte[] buffer = Slip.CreateSlipPacket(binary);
stream.Write(buffer, 0, buffer.Length);
}
// Read a packet
protected byte[] ReadPacket()
{
if (!quitReceiver && stream != null)
{
if (stream is FileStream)
{
FileStream fileStream = (FileStream)stream;
// Store last end position
if (lastEnd == -1)
{
lastEnd = fileStream.Position;
}
// Deal with file truncation, by starting at the start of the file
long end = fileStream.Length;
if (end < lastEnd)
{
fileStream.Seek(0, SeekOrigin.Begin);
packetBuffer.Clear();
lastEnd = fileStream.Position;
}
// Read any new bytes from the file
if (end > lastEnd)
{
byte[] buffer = new byte[end - lastEnd];
int length = fileStream.Read(buffer, 0, buffer.Length);
lastEnd += length;
for (int i = 0; i < length; i++)
{
packetBuffer.Add((byte)buffer[i]);
}
}
// Let's parse any packets
for (; ;)
{
byte[] packet = Slip.ExtractSlipPacket(packetBuffer);
if (packet == null)
{
break;
}
if (packet.Length > 0)
{
//Console.WriteLine("ReadPacket():");
//Console.WriteLine(Slip.HexDump(packet));
return(packet);
}
}
// No packets
Thread.Sleep(20); // short delay to prevent spinning waiting for file appends
}
else
{
for (; ;)
{
// LATER: Shame stream doesn't seem to support checking how many bytes are available without blocking
int b = -1;
try { b = stream.ReadByte(); }
catch (TimeoutException) { }
catch (IOException) { }
catch (ObjectDisposedException) { }
//catch (ThreadInterruptedException) { stream.Close(); break; }
if (b == -1)
{
break;
}
packetBuffer.Add((byte)b);
// Let's parse any packets
for (; ;)
{
byte[] packet = Slip.ExtractSlipPacket(packetBuffer);
if (packet == null)
{
break;
}
if (packet.Length > 0)
{
//Console.WriteLine("ReadPacket():");
//Console.WriteLine(Slip.HexDump(packet));
return(packet);
}
}
}
}
}
return(null);
}
