static public FilePiece parse_packet(byte[] packet)
{
try
{
if (packet.Length < header_size)
{ // paket je prilis kratky
return(null);
}
Int32 data_length = packet.Length - 10;
if (data_length < 0)
{ // subor bez dat
return(null);
}
Int16 status = System.BitConverter.ToInt16(packet, 0);
Int64 position_number = System.BitConverter.ToInt64(packet, 2);
byte[] data = new byte[data_length];
Buffer.BlockCopy(packet, 10, data, 0, data_length);
FilePiece piece = new FilePiece(status, position_number, data);
return(piece);
}
catch (Exception ex)
{
MessageBox.Show("Error Piece: " + ex.Message);
return(new FilePiece(1, 0, new byte[0]));
}
}
public bool SendingTCP(string SendingFile)
{
try
{
client = new TcpClient(ipAddress, PORT + 1000);
netstream = client.GetStream();
FileStreamer file_stream = new FileStreamer(SendingFile);
FileInfo f = new FileInfo(SendingFile);
file_stream = new FileStreamer(SendingFile);
byte[] bytes = new byte[FilePiece.data_size];
FilePiece fp = file_stream.GetNextPiece();
if (fp != null)
{
bytes = fp.data;
}
while (fp != null && bytes != null)
{
netstream.Write(bytes, 0, (int)bytes.Length);
fp = file_stream.GetNextPiece();
if (fp != null)
{
bytes = fp.data;
}
}
netstream.Write(new byte[0], 0, 0);
netstream.Close();
client.Close();
return(true);
}
catch
{
return(false);
}
}
public FilePiece GetNextPiece()
{
byte[] b = GetNextChunk();
FilePiece piece = new FilePiece(1, 2, b);;
try
{
if (b != null)
{
double preresult = fs.Position / FilePiece.data_size;
if (fs.Position % b.Length != 0)
{
preresult = preresult + 0.5;
}
double result = Math.Round(Convert.ToDouble(preresult - 1), MidpointRounding.AwayFromZero);
piece = new FilePiece(1, Convert.ToInt64(result), b);
}
else
{
piece = null;
}
return(piece);
}
catch (Exception ex)
{
MessageBox.Show("Error File Streamer: " + ex.Message);
return(piece);
}
}