private bool processPacket(ref NetworkStream stream)
{
try
{
string data = string.Empty;
for (int i = 0; i < packets.Count; i++)
{
SocketPacket packet = packets[i];
if (packet.operation == 1)
{
if (packet.isMasked)
{
byte[] decoded = setMask(packet.payload, packet.mask);
data = data + Encoding.UTF8.GetString(decoded);
}
}
}
packetCallback?.Invoke(sessionID, data);
return(true);
}
catch (Exception ex)
{
return(false);
}
}
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
isRunning = true;
NetworkStream stream = client.GetStream();
while (true)
{
if (stream.DataAvailable)
{
if (isHandShake)
{
if (makeHandShake(ref stream))
{
isHandShake = false;
}
}
else
{
SocketPacket packet = new SocketPacket();
if (readPacket(ref stream, ref packet))
{
packets.Add(packet);
if (packet.fin)
{
processPacket(ref stream);
packets.Clear();
}
}
}
}
else
{
Thread.Sleep(100);
}
}
}
private bool readPacket(ref NetworkStream stream, ref SocketPacket packet)
{
try
{
//first byte handling
int firstByte = stream.ReadByte();
packet.fin = (firstByte & (1 << 7)) != 0;
packet.rsv1 = (firstByte & (1 << 6)) != 0;
packet.rsv2 = (firstByte & (1 << 5)) != 0;
packet.rsv3 = (firstByte & (1 << 4)) != 0;
packet.operation = firstByte & ((1 << 4) - 1);
int secondByte = stream.ReadByte();
packet.isMasked = (secondByte & (1 << 7)) != 0;
int length = secondByte;
if (packet.isMasked)
{
length = length - SocketPacket.OFFSET_128;
}
if (length > 0 && length < SocketPacket.EXTENDED_PAYLOAD_LENGTH_126)
{
packet.length = (ulong)length;
}
else
{
byte[] tempLength = null;
//big packet
if (length == SocketPacket.EXTENDED_PAYLOAD_LENGTH_126)
{
tempLength = new byte[2];
stream.Read(tempLength, 0, tempLength.Length);
Array.Reverse(tempLength);
packet.length = (ulong)BitConverter.ToInt16(tempLength, 0);
}
//biggest packet
else if (length == SocketPacket.EXTENDED_PAYLOAD_LENGTH_127)
{
tempLength = new byte[8];
stream.Read(tempLength, 0, tempLength.Length);
Array.Reverse(tempLength);
packet.length = (ulong)BitConverter.ToInt64(tempLength, 0);
}
}
packet.mask = new byte[4];
if (packet.isMasked)
{
stream.Read(packet.mask, 0, packet.mask.Length);
}
packet.payload = new byte[packet.length];
stream.Read(packet.payload, 0, packet.payload.Length);
return(true);
}
catch (Exception ex)
{
return(false);
}
}
