private void ProcessAcknowledgment(IPEndPoint remoteEndPoint, TftpPacket requestPacket)
{
var position = requestPacket.BlockNumber * _blockSize;
if (position >= _fileInfo.Length)
{
Console.WriteLine("File transfer successfully finished");
return;
}
var length = Math.Min(_blockSize, (Int32)_fileInfo.Length - position);
using (var writer = new TftpPacketWriter(_fileBlock))
{
writer.WriteUInt16((UInt16)TftpPacketType.Data);
writer.WriteUInt16((UInt16)(requestPacket.BlockNumber + 1));
using (var fileStream = new FileStream(_fileInfo.FullName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
fileStream.Position = position;
fileStream.Read(_fileBlock, 4, (Int32)length);
}
SendData(_fileBlock, length + 4, remoteEndPoint);
}
}
private void SendError(TftpError errorCode, String errorMessage, IPEndPoint remoteEndPoint)
{
Console.WriteLine("Sending error {0} '{1}'", errorCode, errorMessage);
using (var writer = new TftpPacketWriter(errorMessage.Length + 5))
{
writer.WriteUInt16((UInt16)TftpPacketType.Error);
writer.WriteUInt16((UInt16)errorCode);
writer.WriteString(errorMessage);
SendData(writer.ToArray(), remoteEndPoint);
}
}
public Byte[] ToArray()
{
using (var writer = new TftpPacketWriter(Type == TftpPacketType.Data ? Data.Length + 4: 1024))
{
writer.WriteUInt16((UInt16)Type);
switch (Type)
{
case TftpPacketType.ReadRequest:
break;
case TftpPacketType.WriteRequest:
break;
case TftpPacketType.Data:
break;
case TftpPacketType.Acknowledgment:
break;
case TftpPacketType.Error:
break;
case TftpPacketType.OptionAcknowledgment:
var names = Options.GetNames();
foreach (var name in names)
{
writer.WriteString(name);
var value = Options.GetString(name);
writer.WriteString(value);
}
break;
default:
Console.WriteLine("Unsupported packet type: {0}", (int)Type);
break;
}
return(writer.ToArray());
}
}
