public static DiagnosticsMessage Decode(byte[] message)
{
int index = 0;
DiagnosticsMessage msg = new DiagnosticsMessage();
msg.MessageType = (ModbusMessageType)message[7];
msg.TransactionId = (ushort)(message[index++] << 0x08 | message[index++]);
msg.ProtocolId = (ushort)(message[index++] << 0x08 | message[index++]);
msg.Length = (ushort)(message[index++] << 0x08 | message[index++]);
msg.UnitId = Convert.ToByte(message[index++]);
msg.Function = Convert.ToByte(message[index++]);
return(msg);
}
private bool Apply(DiagnosticsMessage mesage)
{
if (Type == ConstraintType.DenyAll)
{
return(false);
}
if (Type == ConstraintType.AllowAll)
{
return(true);
}
if (Filters == null || Filters.Count == 0)
{
return(true);
}
return(false);
}
public static ModbusTcpMessage Create(byte[] message)
{
if (message[7] <= 4 || message[7] == 15 || message[7] == 16)
{
return(BasicModbusMessage.Decode(message));
}
if (message[7] > 4 && message[7] < 7)
{
return(WriteSingleMessage.Decode(message));
}
if (message[7] == 8 || message[7] == 11 || message[7] == 12)
{
return(DiagnosticsMessage.Decode(message));
}
throw new InvalidCastException("Invalid modbus message type.");
}