public static void ParseAsync(Stream stream, Action <WsFrame> completed, Action <Exception> error)
{
WsFrame.ParseAsync(stream, true, completed, error);
}
public void Print(bool dumped)
{
Console.WriteLine((!dumped) ? WsFrame.print(this) : WsFrame.dump(this));
}
public static WsFrame Parse(Stream stream)
{
return(WsFrame.Parse(stream, true));
}
public static void ParseAsync(Stream stream, Action <WsFrame> completed)
{
WsFrame.ParseAsync(stream, true, completed, null);
}
private static WsFrame parse(byte[] header, Stream stream, bool unmask)
{
Fin fin = ((header[0] & 128) != 128) ? Fin.More : Fin.Final;
Rsv rsv = ((header[0] & 64) != 64) ? Rsv.Off : Rsv.On;
Rsv rsv2 = ((header[0] & 32) != 32) ? Rsv.Off : Rsv.On;
Rsv rsv3 = ((header[0] & 16) != 16) ? Rsv.Off : Rsv.On;
Opcode opcode = (Opcode)(header[0] & 15);
Mask mask = ((header[1] & 128) != 128) ? Mask.Unmask : Mask.Mask;
byte b = header[1] & 127;
string text = (!WsFrame.isControl(opcode) || fin != Fin.More) ? ((WsFrame.isData(opcode) || rsv != Rsv.On) ? null : "A non data frame is compressed.") : "A control frame is fragmented.";
if (text != null)
{
throw new WebSocketException(CloseStatusCode.IncorrectData, text);
}
if (WsFrame.isControl(opcode) && b > 125)
{
throw new WebSocketException(CloseStatusCode.InconsistentData, "The payload data length of a control frame is greater than 125 bytes.");
}
WsFrame wsFrame = new WsFrame
{
Fin = fin,
Rsv1 = rsv,
Rsv2 = rsv2,
Rsv3 = rsv3,
Opcode = opcode,
Mask = mask,
PayloadLen = b
};
int num = (b >= 126) ? ((b != 126) ? 8 : 2) : 0;
byte[] array = (num <= 0) ? new byte[0] : stream.ReadBytes(num);
if (num > 0 && array.Length != num)
{
throw new WebSocketException("The 'Extended Payload Length' of a frame cannot be read from the data source.");
}
wsFrame.ExtPayloadLen = array;
bool flag = mask == Mask.Mask;
byte[] array2 = (!flag) ? new byte[0] : stream.ReadBytes(4);
if (flag && array2.Length != 4)
{
throw new WebSocketException("The 'Masking Key' of a frame cannot be read from the data source.");
}
wsFrame.MaskingKey = array2;
ulong num2 = (b >= 126) ? ((b != 126) ? array.ToUInt64(ByteOrder.Big) : ((ulong)array.ToUInt16(ByteOrder.Big))) : ((ulong)b);
byte[] array3;
if (num2 > 0UL)
{
if (b > 126 && num2 > 9223372036854775807UL)
{
throw new WebSocketException(CloseStatusCode.TooBig, "The 'Payload Data' length is greater than the allowable length.");
}
array3 = ((b <= 126) ? stream.ReadBytes((int)num2) : stream.ReadBytes((long)num2, 1024));
if (array3.LongLength != (long)num2)
{
throw new WebSocketException("The 'Payload Data' of a frame cannot be read from the data source.");
}
}
else
{
array3 = new byte[0];
}
PayloadData payloadData = new PayloadData(array3, flag);
if (flag && unmask)
{
payloadData.Mask(array2);
wsFrame.Mask = Mask.Unmask;
wsFrame.MaskingKey = new byte[0];
}
wsFrame.PayloadData = payloadData;
return(wsFrame);
}
public static WsFrame Parse(byte[] src)
{
return(WsFrame.Parse(src, true));
}
public void ReadFrameAsync(Action <WsFrame> completed)
{
WsFrame.ParseAsync(_innerStream, completed);
}
private static WsFrame parse(byte [] header, Stream stream, bool unmask)
{
/* Header */
// FIN
var fin = (header [0] & 0x80) == 0x80 ? Fin.Final : Fin.More;
// RSV1
var rsv1 = (header [0] & 0x40) == 0x40 ? Rsv.On : Rsv.Off;
// RSV2
var rsv2 = (header [0] & 0x20) == 0x20 ? Rsv.On : Rsv.Off;
// RSV3
var rsv3 = (header [0] & 0x10) == 0x10 ? Rsv.On : Rsv.Off;
// Opcode
var opcode = (Opcode)(header [0] & 0x0f);
// MASK
var mask = (header [1] & 0x80) == 0x80 ? Mask.Mask : Mask.Unmask;
// Payload len
var payloadLen = (byte)(header [1] & 0x7f);
// Check if correct frame.
var incorrect = isControl(opcode) && fin == Fin.More
? "A control frame is fragmented."
: !isData(opcode) && rsv1 == Rsv.On
? "A non data frame is compressed."
: null;
if (incorrect != null)
{
throw new WebSocketException(CloseStatusCode.IncorrectData, incorrect);
}
// Check if consistent frame.
if (isControl(opcode) && payloadLen > 125)
{
throw new WebSocketException(
CloseStatusCode.InconsistentData,
"The payload data length of a control frame is greater than 125 bytes.");
}
var frame = new WsFrame {
Fin = fin,
Rsv1 = rsv1,
Rsv2 = rsv2,
Rsv3 = rsv3,
Opcode = opcode,
Mask = mask,
PayloadLen = payloadLen
};
/* Extended Payload Length */
var extLen = payloadLen < 126
? 0
: payloadLen == 126
? 2
: 8;
var extPayloadLen = extLen > 0
? stream.ReadBytes(extLen)
: new byte [] {};
if (extLen > 0 && extPayloadLen.Length != extLen)
{
throw new WebSocketException(
"The 'Extended Payload Length' of a frame cannot be read from the data source.");
}
frame.ExtPayloadLen = extPayloadLen;
/* Masking Key */
var masked = mask == Mask.Mask;
var maskingKey = masked
? stream.ReadBytes(4)
: new byte [] {};
if (masked && maskingKey.Length != 4)
{
throw new WebSocketException(
"The 'Masking Key' of a frame cannot be read from the data source.");
}
frame.MaskingKey = maskingKey;
/* Payload Data */
ulong dataLen = payloadLen < 126
? payloadLen
: payloadLen == 126
? extPayloadLen.ToUInt16(ByteOrder.Big)
: extPayloadLen.ToUInt64(ByteOrder.Big);
byte [] data = null;
if (dataLen > 0)
{
// Check if allowable payload data length.
if (payloadLen > 126 && dataLen > PayloadData.MaxLength)
{
throw new WebSocketException(
CloseStatusCode.TooBig, "The 'Payload Data' length is greater than the allowable length.");
}
data = payloadLen > 126
? stream.ReadBytes((long)dataLen, 1024)
: stream.ReadBytes((int)dataLen);
if (data.LongLength != (long)dataLen)
{
throw new WebSocketException(
"The 'Payload Data' of a frame cannot be read from the data source.");
}
}
else
{
data = new byte [] {};
}
var payload = new PayloadData(data, masked);
if (masked && unmask)
{
payload.Mask(maskingKey);
frame.Mask = Mask.Unmask;
frame.MaskingKey = new byte [] {};
}
frame.PayloadData = payload;
return(frame);
}
public void ReadFrameAsync(
Action <WsFrame> completed, Action <Exception> error)
{
WsFrame.ParseAsync(_innerStream, true, completed, error);
}
public bool WriteFrame(WsFrame frame)
{
return(write(frame.ToByteArray()));
}
public WsFrame ReadFrame()
{
return(WsFrame.Parse(_innerStream, true));
}
private static void dump(WsFrame frame)
{
var len = frame.Length;
var count = (long)(len / 4);
var remainder = (int)(len % 4);
int countDigit;
string countFmt;
if (count < 10000)
{
countDigit = 4;
countFmt = "{0,4}";
}
else if (count < 0x010000)
{
countDigit = 4;
countFmt = "{0,4:X}";
}
else if (count < 0x0100000000)
{
countDigit = 8;
countFmt = "{0,8:X}";
}
else
{
countDigit = 16;
countFmt = "{0,16:X}";
}
var spFmt = String.Format("{{0,{0}}}", countDigit);
var headerFmt = String.Format(@"
{0} 01234567 89ABCDEF 01234567 89ABCDEF
{0}+--------+--------+--------+--------+", spFmt);
var footerFmt = String.Format(" {0}+--------+--------+--------+--------+", spFmt);
Func <Action <string, string, string, string> > linePrinter = () =>
{
long lineCount = 0;
var lineFmt = String.Format(" {0}|{{1,8}} {{2,8}} {{3,8}} {{4,8}}|", countFmt);
return((arg1, arg2, arg3, arg4) =>
{
Console.WriteLine(lineFmt, ++lineCount, arg1, arg2, arg3, arg4);
});
};
var printLine = linePrinter();
Console.WriteLine(headerFmt, String.Empty);
var buffer = frame.ToByteArray();
int i, j;
for (i = 0; i <= count; i++)
{
j = i * 4;
if (i < count)
{
printLine(
Convert.ToString(buffer[j], 2).PadLeft(8, '0'),
Convert.ToString(buffer[j + 1], 2).PadLeft(8, '0'),
Convert.ToString(buffer[j + 2], 2).PadLeft(8, '0'),
Convert.ToString(buffer[j + 3], 2).PadLeft(8, '0'));
}
else if (remainder > 0)
{
printLine(
Convert.ToString(buffer[j], 2).PadLeft(8, '0'),
remainder >= 2 ? Convert.ToString(buffer[j + 1], 2).PadLeft(8, '0') : String.Empty,
remainder == 3 ? Convert.ToString(buffer[j + 2], 2).PadLeft(8, '0') : String.Empty,
String.Empty);
}
}
Console.WriteLine(footerFmt, String.Empty);
}
private static string print(WsFrame frame)
{
/* Opcode */
var opcode = frame.Opcode.ToString();
/* Payload Len */
var payloadLen = frame.PayloadLen;
/* Extended Payload Len */
var ext = frame.ExtPayloadLen;
var size = ext.Length;
var extLen = size == 2
? ext.ToUInt16(ByteOrder.Big).ToString()
: size == 8
? ext.ToUInt64(ByteOrder.Big).ToString()
: String.Empty;
/* Masking Key */
var masked = frame.IsMasked;
var key = masked
? BitConverter.ToString(frame.MaskingKey)
: String.Empty;
/* Payload Data */
var data = payloadLen == 0
? String.Empty
: size > 0
? String.Format("A {0} data with {1} bytes.", opcode.ToLower(), extLen)
: masked || frame.IsFragmented || frame.IsBinary || frame.IsClose
? BitConverter.ToString(frame.PayloadData.ToByteArray())
: Encoding.UTF8.GetString(frame.PayloadData.ApplicationData);
var format =
@" FIN: {0}
RSV1: {1}
RSV2: {2}
RSV3: {3}
Opcode: {4}
MASK: {5}
Payload Len: {6}
Extended Payload Len: {7}
Masking Key: {8}
Payload Data: {9}";
return(String.Format(
format,
frame.Fin,
frame.Rsv1,
frame.Rsv2,
frame.Rsv3,
opcode,
frame.Mask,
payloadLen,
extLen,
key,
data));
}
public string PrintToString(bool dumped)
{
return((!dumped) ? WsFrame.print(this) : WsFrame.dump(this));
}
private static string dump(WsFrame frame)
{
ulong length = frame.Length;
long num = (long)(length / 4UL);
int num2 = (int)(length % 4UL);
string countFmt;
int num3;
if (num < 10000L)
{
num3 = 4;
countFmt = "{0,4}";
}
else if (num < 65536L)
{
num3 = 4;
countFmt = "{0,4:X}";
}
else if (num < 4294967296L)
{
num3 = 8;
countFmt = "{0,8:X}";
}
else
{
num3 = 16;
countFmt = "{0,16:X}";
}
string arg = string.Format("{{0,{0}}}", num3);
string format = string.Format("{0} 01234567 89ABCDEF 01234567 89ABCDEF\n{0}+--------+--------+--------+--------+\\n", arg);
string format2 = string.Format("{0}+--------+--------+--------+--------+", arg);
StringBuilder buffer = new StringBuilder(64);
Func <Action <string, string, string, string> > func = delegate()
{
long lineCount = 0L;
string lineFmt = string.Format("{0}|{{1,8}} {{2,8}} {{3,8}} {{4,8}}|\n", countFmt);
return(delegate(string arg1, string arg2, string arg3, string arg4)
{
buffer.AppendFormat(lineFmt, new object[]
{
lineCount += 1L,
arg1,
arg2,
arg3,
arg4
});
});
};
Action <string, string, string, string> action = func();
buffer.AppendFormat(format, string.Empty);
byte[] array = frame.ToByteArray();
int num4 = 0;
while ((long)num4 <= num)
{
int num5 = num4 * 4;
if ((long)num4 < num)
{
action(Convert.ToString(array[num5], 2).PadLeft(8, '0'), Convert.ToString(array[num5 + 1], 2).PadLeft(8, '0'), Convert.ToString(array[num5 + 2], 2).PadLeft(8, '0'), Convert.ToString(array[num5 + 3], 2).PadLeft(8, '0'));
}
else if (num2 > 0)
{
action(Convert.ToString(array[num5], 2).PadLeft(8, '0'), (num2 < 2) ? string.Empty : Convert.ToString(array[num5 + 1], 2).PadLeft(8, '0'), (num2 != 3) ? string.Empty : Convert.ToString(array[num5 + 2], 2).PadLeft(8, '0'), string.Empty);
}
num4++;
}
buffer.AppendFormat(format2, string.Empty);
return(buffer.ToString());
}
private byte[] receiveFragmented(WsFrame firstFrame)
{
var buffer = new List <byte>(firstFrame.PayloadData.ToBytes());
while (true)
{
var frame = readFrame();
if (frame.IsNull())
{
return(null);
}
if (frame.Fin == Fin.MORE)
{
if (frame.Opcode == Opcode.CONT)
{// MORE & CONT
buffer.AddRange(frame.PayloadData.ToBytes());
continue;
}
#if DEBUG
Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
#endif
close(CloseStatusCode.INCORRECT_DATA, String.Empty);
return(null);
}
if (frame.Opcode == Opcode.CONT)
{// FINAL & CONT
buffer.AddRange(frame.PayloadData.ToBytes());
break;
}
if (frame.Opcode == Opcode.CLOSE)
{// FINAL & CLOSE
#if DEBUG
Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
#endif
close(frame.PayloadData);
return(null);
}
if (frame.Opcode == Opcode.PING)
{// FINAL & PING
#if DEBUG
Console.WriteLine("WS: Info@receiveFragmented: Returns Pong.");
#endif
pong(frame.PayloadData);
continue;
}
if (frame.Opcode == Opcode.PONG)
{// FINAL & PONG
#if DEBUG
Console.WriteLine("WS: Info@receiveFragmented: Receives Pong.");
#endif
_receivePong.Set();
continue;
}
// FINAL & (TEXT | BINARY)
#if DEBUG
Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
#endif
close(CloseStatusCode.INCORRECT_DATA, String.Empty);
return(null);
}
return(buffer.ToArray());
}
private static WsFrame parse(byte[] header, Stream stream, bool unmask)
{
/* Header */
// FIN
var fin = (header[0] & 0x80) == 0x80 ? Fin.FINAL : Fin.MORE;
// RSV1
var rsv1 = (header[0] & 0x40) == 0x40 ? Rsv.ON : Rsv.OFF;
// RSV2
var rsv2 = (header[0] & 0x20) == 0x20 ? Rsv.ON : Rsv.OFF;
// RSV3
var rsv3 = (header[0] & 0x10) == 0x10 ? Rsv.ON : Rsv.OFF;
// Opcode
var opcode = (Opcode)(header[0] & 0x0f);
// MASK
var mask = (header[1] & 0x80) == 0x80 ? Mask.MASK : Mask.UNMASK;
// Payload len
var payloadLen = (byte)(header[1] & 0x7f);
if (isControl(opcode) && payloadLen > 125)
{
return(createCloseFrame(CloseStatusCode.INCONSISTENT_DATA,
"The payload length of a control frame must be 125 bytes or less."));
}
var frame = new WsFrame {
Fin = fin,
Rsv1 = rsv1,
Rsv2 = rsv2,
Rsv3 = rsv3,
Opcode = opcode,
Mask = mask,
PayloadLen = payloadLen
};
/* Extended Payload Length */
var extLen = payloadLen < 126
? 0
: payloadLen == 126
? 2
: 8;
var extPayloadLen = extLen > 0
? stream.ReadBytesInternal(extLen)
: new byte[] {};
if (extLen > 0 && extPayloadLen.Length != extLen)
{
return(createCloseFrame(CloseStatusCode.ABNORMAL,
"'Extended Payload Length' of a frame cannot be read from the data stream."));
}
frame.ExtPayloadLen = extPayloadLen;
/* Masking Key */
var masked = mask == Mask.MASK ? true : false;
var maskingKey = masked
? stream.ReadBytesInternal(4)
: new byte[] {};
if (masked && maskingKey.Length != 4)
{
return(createCloseFrame(CloseStatusCode.ABNORMAL,
"'Masking Key' of a frame cannot be read from the data stream."));
}
frame.MaskingKey = maskingKey;
/* Payload Data */
ulong dataLen = payloadLen < 126
? payloadLen
: payloadLen == 126
? extPayloadLen.To <ushort>(ByteOrder.BIG)
: extPayloadLen.To <ulong>(ByteOrder.BIG);
byte[] data = null;
if (dataLen > 0)
{
if (payloadLen > 126 && dataLen > PayloadData.MaxLength)
{
var code = CloseStatusCode.TOO_BIG;
return(createCloseFrame(code, code.GetMessage()));
}
data = dataLen > 1024
? stream.ReadBytesInternal((long)dataLen, 1024)
: stream.ReadBytesInternal((int)dataLen);
if (data.LongLength != (long)dataLen)
{
return(createCloseFrame(CloseStatusCode.ABNORMAL,
"'Payload Data' of a frame cannot be read from the data stream."));
}
}
else
{
data = new byte[] {};
}
var payloadData = new PayloadData(data, masked);
if (masked && unmask)
{
payloadData.Mask(maskingKey);
frame.Mask = Mask.UNMASK;
frame.MaskingKey = new byte[] {};
}
frame.PayloadData = payloadData;
return(frame);
}