public Packet(byte[] data, UInt16 command, Sender sender)
{
Data = data;
Command = command;
Sender = sender;
CrCHandler crc = new CrCHandler();
Crc = crc.ComputeChecksumBytes(data);
Size = unchecked ((short)(data.Length + 14));
TotalData = new byte[0];
IsEmpty = false;
}
public static Packet ParsePacket(byte[] data, int len)
{
try
{
var a = new Packet()
{
TotalData = data
};
var command = (UInt16)HelpMethods.GetNumber(data[2], data[3]);
var sender = new Sender(SenderType.UnNamedByteMask);
var sendertype = (SenderType)data[4];
sender.Type = sendertype;
Buffer.BlockCopy(data, 5, sender.Mask, 0, 7);
if (sendertype == SenderType.SevenByteName)
{
sender.Name = Encoding.Default.GetString(sender.Mask);
}
a.Sender = sender;
a.Size = (short)len;
a.Command = command;
a.Data = new byte[len - 14];
Buffer.BlockCopy(data, 12, a.Data, 0, len - 14);
CrCHandler crc = new CrCHandler();
a.Crc = new byte[2] {
data[data.Length - 2], data[data.Length - 1]
};
var newCrc = crc.ComputeChecksumBytes(a.Data);
if (a.Crc[0] != newCrc[0] || a.Crc[1] != newCrc[1])
{
throw new WrongPacketInputException(a, new Tuple <byte, byte>(newCrc[0], newCrc[1]), new Tuple <byte, byte>(a.Crc[0], a.Crc[1]));
}
return(a);
}
catch (Exception e)
{
throw new WrongPacketInputException(e);
}
}