/// <summary>
/// Serializes the data frame.
/// </summary>
/// <param name="frame">The frame.</param>
/// <returns>Binary representation of the frame.</returns>
private static byte[] SerializeDataFrame(DataFrame frame)
{
var data = new byte[8 + frame.Length];
BinaryHelper.Int32ToBytes(frame.StreamId, new ArraySegment <byte>(data, 0, 4));
data[4] = Convert.ToByte(frame.Flags | (frame.IsFinal ? 0x01 : 0x00));
BinaryHelper.Int32ToBytes(frame.Length, new ArraySegment <byte>(data, 5, 3));
Buffer.BlockCopy(frame.Data, 0, data, 8, frame.Length);
return(data);
}
private byte[] SerializeControlFrameHeaders(ProtocolHeaders frameHeaders)
{
var headers = new List <byte>(256);
headers.AddRange(BinaryHelper.Int32ToBytes(frameHeaders.Count));
foreach (KeyValuePair <string, string> pair in frameHeaders)
{
byte[] nameBin = Encoding.UTF8.GetBytes(pair.Key);
headers.AddRange(BinaryHelper.Int32ToBytes(nameBin.Length));
headers.AddRange(nameBin);
byte[] valBin = Encoding.UTF8.GetBytes(pair.Value);
headers.AddRange(BinaryHelper.Int32ToBytes(valBin.Length));
headers.AddRange(valBin);
}
return(headers.ToArray());
}
/// <summary>
/// Serializes the control frame.
/// </summary>
/// <param name="frame">The frame.</param>
/// <returns>Serialized control frame.</returns>
private byte[] SerializeControlFrame(ControlFrame frame)
{
var byteList = new List <byte>();
byteList.Add((byte)(((frame.Version & 0xFF00) >> 8) | 0x80));
byteList.Add((byte)(frame.Version & 0x00FF));
byteList.Add((byte)(((Int16)frame.Type & 0xFF00) >> 8));
byteList.Add((byte)((Int16)frame.Type & 0x00FF));
var headersArray = new byte[0];
switch (frame.Type)
{
case FrameType.SynStream:
byteList.Add(Convert.ToByte(frame.Flags | (frame.IsFinal ? 0x01 : 0x00)));
headersArray = SerializeControlFrameHeaders(frame.Headers);
if (headersArray.Length > 0)
{
ProcessorRun(ref headersArray, DirectionProcessType.Outbound, frame.Flags);
}
byteList.AddRange(BinaryHelper.Int32ToBytes(headersArray.Length + 10, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
byteList.AddRange(BinaryHelper.Int32ToBytes(0));
byteList.Add(Convert.ToByte(frame.Priority >> 5));
byteList.Add(Unused);
break;
case FrameType.RTS:
byteList.Add(0);
byteList.AddRange(BinaryHelper.Int32ToBytes(headersArray.Length + 8, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
byteList.AddRange(BinaryHelper.Int32ToBytes((int)frame.StatusCode));
break;
case FrameType.SynReply:
byteList.Add(frame.Flags);
headersArray = SerializeControlFrameHeaders(frame.Headers);
if (headersArray.Length > 0)
{
ProcessorRun(ref headersArray, DirectionProcessType.Outbound, frame.Flags);
}
byteList.AddRange(BinaryHelper.Int32ToBytes(headersArray.Length + 4, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
break;
case FrameType.GoAway:
byteList.Add(frame.Flags);
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.Length, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
byteList.AddRange(BinaryHelper.Int32ToBytes((int)frame.StatusCode));
break;
case FrameType.Ping:
byteList.Add(frame.Flags);
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.Length, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
break;
case FrameType.WindowUpdate:
byteList.Add(frame.Flags);
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.Length, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.StreamId));
byteList.AddRange(BinaryHelper.Int64ToBytes(((WindowUpdateFrame)frame).DeltaWindowSize));
break;
case FrameType.Settings:
byteList.Add(frame.Flags);
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.Length, 3));
byteList.AddRange(BinaryHelper.Int32ToBytes(frame.NumberOfEntries));
break;
}
byteList.AddRange(headersArray);
return(byteList.ToArray());
}