public TCPPacketFlags GetPacketFlags()
{
TCPPacketFlags F = default(TCPPacketFlags);
this.Header.Seek(4, System.IO.SeekOrigin.Begin);
F = (TCPPacketFlags)this.Header.BR.ReadByte();
return(F);
}
public byte[] GetPacketDgram()
{
TCPPacketFlags Flags = this.GetPacketFlags();
byte[] Dgram = null;
try
{
if ((Flags & TCPPacketFlags.GZipCompressed) > 0)
{
this.Content.Seek(0, System.IO.SeekOrigin.Begin);
int OriginalLength = this.Content.BR.ReadInt32();
System.IO.Compression.GZipStream GZip = new System.IO.Compression.GZipStream(this.Content, System.IO.Compression.CompressionMode.Decompress);
//Dim DecompressedBuffer As Byte() = New Byte(OriginalLength - 1) {}
//Dim totalCount As Integer = TCPPacketBuilder.ReadAllBytesFromStream(GZip, DecompressedBuffer)
Dgram = new byte[OriginalLength];
GZip.Read(Dgram, 0, OriginalLength);
GZip.Close();
}
else
{
//Dgram = New Byte(totalCount - 1) {}
//Array.Copy(DecompressedBuffer, 0, Dgram, 0, totalCount)
Dgram = this.Content.ToArray();
}
this.Header.Close();
this.Content.Close();
this.SetState(PacketState.Empty);
}
catch (Exception ex)
{
throw ex;
}
return(Dgram);
}
public byte[] BuildPacket(byte[] dgram, TCPPacketFlags Flags)
{
DataStream OutDS = null;
DataStream InputDS = null;
byte[] ret = null;
try
{
OutDS = new DataStream();
InputDS = new DataStream();
//build input dgram
if ((Flags & TCPPacketFlags.GZipCompressed) > 0)
{
InputDS.BW.Write((int)dgram.Length);
System.IO.Compression.GZipStream GZip = new System.IO.Compression.GZipStream(InputDS, System.IO.Compression.CompressionMode.Compress, true);
GZip.Write(dgram, 0, dgram.Length);
GZip.Close();
//versneltruck: kijk of de gecompressed versie wel echt kleiner is
if (InputDS.Length > dgram.Length)
{
//groter ==> geen compressie gebruiken
return(this.BuildPacket(dgram, Flags ^ TCPPacketFlags.GZipCompressed));
}
}
else
{
InputDS.Write(dgram, 0, dgram.Length);
}
//header:
OutDS.BW.Write((int)InputDS.Length);
OutDS.BW.Write((byte)Flags);
//content:
InputDS.WriteTo(OutDS);
ret = OutDS.ToArray();
InputDS.Close();
OutDS.Close();
}
catch (Exception ex)
{
throw;
}
finally
{
if (InputDS != null)
{
InputDS.Close();
InputDS = null;
}
if (OutDS != null)
{
OutDS.Close();
OutDS = null;
}
}
return(ret);
}
