internal void Unmask()
{
if (this._mask != WebSocketSharp.Mask.Off)
{
this._mask = WebSocketSharp.Mask.Off;
this._payloadData.Mask(this._maskingKey);
this._maskingKey = WebSocket.EmptyBytes;
}
}
private static WebSocketFrame processHeader(byte[] header)
{
string str;
if ((int)header.Length != 2)
{
throw new WebSocketException("The header of a frame cannot be read from the stream.");
}
WebSocketSharp.Fin fin = ((header[0] & 128) == 128 ? WebSocketSharp.Fin.Final : WebSocketSharp.Fin.More);
Rsv rsv = ((header[0] & 64) == 64 ? Rsv.On : Rsv.Off);
Rsv rsv1 = ((header[0] & 32) == 32 ? Rsv.On : Rsv.Off);
Rsv rsv2 = ((header[0] & 16) == 16 ? Rsv.On : Rsv.Off);
byte num = (byte)(header[0] & 15);
WebSocketSharp.Mask mask = ((header[1] & 128) == 128 ? WebSocketSharp.Mask.On : WebSocketSharp.Mask.Off);
byte num1 = (byte)(header[1] & 127);
if (!num.IsSupported())
{
str = "An unsupported opcode.";
}
else if (!num.IsData() && rsv == Rsv.On)
{
str = "A non data frame is compressed.";
}
else if (num.IsControl() && fin == WebSocketSharp.Fin.More)
{
str = "A control frame is fragmented.";
}
else if (!num.IsControl() || num1 <= 125)
{
str = null;
}
else
{
str = "A control frame has a long payload length.";
}
string str1 = str;
if (str1 != null)
{
throw new WebSocketException(CloseStatusCode.ProtocolError, str1);
}
WebSocketFrame webSocketFrames = new WebSocketFrame()
{
_fin = fin,
_rsv1 = rsv,
_rsv2 = rsv1,
_rsv3 = rsv2,
_opcode = (WebSocketSharp.Opcode)num,
_mask = mask,
_payloadLength = num1
};
return(webSocketFrames);
}
internal WebSocketFrame(WebSocketSharp.Fin fin, WebSocketSharp.Opcode opcode, WebSocketSharp.PayloadData payloadData, bool compressed, bool mask)
{
this._fin = fin;
this._rsv1 = (opcode.IsData() & compressed ? Rsv.On : Rsv.Off);
this._rsv2 = Rsv.Off;
this._rsv3 = Rsv.Off;
this._opcode = opcode;
ulong length = payloadData.Length;
if (length < (long)126)
{
this._payloadLength = (byte)length;
this._extPayloadLength = WebSocket.EmptyBytes;
}
else if (length >= (long)65536)
{
this._payloadLength = 127;
this._extPayloadLength = length.InternalToByteArray(ByteOrder.Big);
}
else
{
this._payloadLength = 126;
this._extPayloadLength = ((ushort)length).InternalToByteArray(ByteOrder.Big);
}
if (!mask)
{
this._mask = WebSocketSharp.Mask.Off;
this._maskingKey = WebSocket.EmptyBytes;
}
else
{
this._mask = WebSocketSharp.Mask.On;
this._maskingKey = WebSocketFrame.createMaskingKey();
payloadData.Mask(this._maskingKey);
}
this._payloadData = payloadData;
}
internal WebSocketFrame(WebSocketSharp.Fin fin, WebSocketSharp.Opcode opcode, WebSocketSharp.PayloadData payloadData, bool compressed, bool mask)
{
this._fin = fin;
this._rsv1 = (!opcode.IsData() || !compressed) ? Rsv.Off : Rsv.On;
this._rsv2 = Rsv.Off;
this._rsv3 = Rsv.Off;
this._opcode = opcode;
ulong length = payloadData.Length;
if (length < 0x7e)
{
this._payloadLength = (byte)length;
this._extPayloadLength = WebSocket.EmptyBytes;
}
else if (length < 0x10000L)
{
this._payloadLength = 0x7e;
this._extPayloadLength = ((ushort)length).InternalToByteArray(ByteOrder.Big);
}
else
{
this._payloadLength = 0x7f;
this._extPayloadLength = length.InternalToByteArray(ByteOrder.Big);
}
if (!mask)
{
this._mask = WebSocketSharp.Mask.Off;
this._maskingKey = WebSocket.EmptyBytes;
}
else
{
this._mask = WebSocketSharp.Mask.On;
this._maskingKey = createMaskingKey();
payloadData.Mask(this._maskingKey);
}
this._payloadData = payloadData;
}
