private string ExtractOnePendingPacket()
{
int pos = _pendingBuffer.IndexOf(PacketDelimiter);
if (pos >= 0)
{
string packet = _pendingBuffer.Substring(0, pos);
_pendingBuffer = _pendingBuffer.Substring(pos + PacketDelimiter.Length);
byte[] data = _encoding.GetBytes(packet);
Rc4Encryption.Encrypt(data);
Array.Reverse(data);
data = ApplyMiddleSwap(data);
string content = _encoding.GetString(data);
content = content.Trim();
string trimedDelimiter = PacketDelimiter.Trim();
while (content.EndsWith(trimedDelimiter))
{
content = content.Substring(0, content.Length - trimedDelimiter.Length).Trim();
}
return(content);
}
return(null);
}
public async Task SendAsync(string content)
{
byte[] data = _encoding.GetBytes(content);
data = AppendSecurityByte(data);
data = ApplyMiddleSwap(data);
Array.Reverse(data);
Rc4Encryption.Encrypt(data);
data = AppendPacketDelimiter(data);
try
{
await _stream.WriteAsync(data, 0, data.Length);
}
catch (Exception)
{
IsConnected = false;
}
}
