public static async Task <PacketResult> ReadPacket(Stream stream, Stopwatch sw = null)
{
Logger.Debug("ReadPacket read packet length (1 byte)");
if (sw == null)
{
sw = Stopwatch.StartNew();
}
var smallBuf = new byte[1];
var read = await stream.ReadAsync(smallBuf);
var packetLength = smallBuf[0];
Logger.Debug("ReadPacket packetLength={packetLength}", packetLength);
if (read < 1)
{
Logger.Debug("ReadPacket Could not read packet length, return Timeout");
return(PacketResult.Timeout());
}
var totalRead = 0;
var data = new byte[packetLength + 1];
data[0] = packetLength;
while (totalRead < packetLength)
{
read = await stream.ReadAsync(data, totalRead + 1, packetLength - totalRead);
if (read == 0)
{
Logger.Debug("ReadPacket Could not complete reading of packet");
return(PacketResult.WrongSize());
}
totalRead += read;
}
sw.Stop();
if (!Crc16.CheckCrc16(data))
{
Logger.Debug("ReadPacket CRC check failed.");
return(PacketResult.WrongCrc());
}
Logger.Debug($"ReadPacket success: {data.ToHexString(" ")}");
return(PacketResult.FromData(data, sw.Elapsed));
}
public static async Task <PacketResult> ReadPacket(Stream stream)
{
Logger.Debug("ReadPacket read packet length (1 byte)");
var packetLength = stream.ReadByte();
Logger.Debug("ReadPacket packetLength={packetLength}", packetLength);
if (packetLength < 0)
{
Logger.Debug("ReadPacket Could not read packet length, return Timeout");
return(PacketResult.Timeout());
}
var totalRead = 0;
var data = new byte[packetLength + 1];
data[0] = (byte)packetLength;
while (totalRead < packetLength)
{
var read = await stream.ReadAsync(data, totalRead + 1, packetLength - totalRead);
if (read == 0)
{
Logger.Debug("ReadPacket Could not complete reading of packet");
return(PacketResult.WrongSize());
}
totalRead += read;
}
if (!Crc16.CheckCrc16(data))
{
Logger.Debug("ReadPacket CRC check failed.");
return(PacketResult.WrongCrc());
}
Logger.Debug($"ReadPacket success: {data.ToHexString(" ")}");
return(PacketResult.FromData(data));
}