public static bool validate(byte[] content)
{
var buffer = Unpooled.WrappedBuffer(content);
var waitValidateData = new byte[buffer.ReadableBytes - 2];
buffer.ReadBytes(waitValidateData);
var crc = new byte[2];
buffer.ReadBytes(crc);
var calCrc = CRCUtil.CalCrc(waitValidateData);
return(BytesUtil.ByteArrayEquals(calCrc, crc));
}
public static byte[] Split(IByteBuffer buffer)
{
var readableSize = buffer.ReadableBytes;
if (readableSize == 0)
{
return(null);
}
int startIndex = -1;
byte[] starter = new byte[2];
for (int i = 0; i < readableSize - 1; i++)
{
starter[0] = buffer.GetByte(i);
starter[1] = buffer.GetByte(i + 1);
if (BytesUtil.ByteArrayEquals(starter, LaserDefault.Starter))
{
startIndex = i;
break;
}
}
//至少得有13个字节 帧头（2) + 长度(2) + 硬件类型(1) + MAC地址(6) + CRC校验(2)
if (startIndex == -1 || readableSize < 13)
{
return(null);
}
buffer.SetReaderIndex(startIndex);
byte[] srcLength = new byte[2];
buffer.GetBytes(2, srcLength);
int length = BytesUtil.Bytes2Int16(srcLength);
//真正的包长度 = 帧头（2) + 长度(2) + 【长度值 硬件类型(1) + MAC地址(6) + 业务数据(n)】 + CRC校验(2)
byte[] frame = null;
int frameLength = length + 6;
if (readableSize >= frameLength)
{
frame = new byte[frameLength];
buffer.ReadBytes(frame);
}
return(frame);
}
public static BaseMessage parse(byte[] bytes)
{
try
{
IByteBuffer byteBuf = Unpooled.WrappedBuffer(bytes);
//帧头
var startSign = new byte[2];
byteBuf.ReadBytes(startSign);
//长度 = 硬件类型 + mac + 消息内容
var srcLength = new byte[2];
byteBuf.ReadBytes(srcLength);
var length = BytesUtil.Bytes2Int16(srcLength);
var contentLength = length - LaserDefault.HardwareTypeLength - LaserDefault.MacLength;
var hardwareTypeCode = byteBuf.ReadByte();
var srcMac = new byte[LaserDefault.MacLength];
byteBuf.ReadBytes(srcMac);
var mac = BytesUtil.BytesToHex(srcMac);
var sn = String.Join("CL", mac);
var srcContent = new byte[contentLength];
byteBuf.ReadBytes(srcContent);
var crc = new byte[2];
byteBuf.ReadBytes(crc);
byteBuf.Release();
var buffer = Unpooled.WrappedBuffer(srcContent);
byte protocolVersion = buffer.ReadByte();
var srcSerial = new byte[2];
buffer.ReadBytes(srcSerial);
int serial = BytesUtil.Bytes2Int16(srcSerial);
var srcFunction = new byte[2];
buffer.ReadBytes(srcFunction);
var function = BytesUtil.Bytes2Int16(srcFunction);
var bizCode = function >> 12;
var funcCode = function & 0xfff;
var coreContent = new byte[srcContent.Length - 5];
buffer.ReadBytes(coreContent);
buffer.Release();
// baseMessage.
// baseMessage.SetFunctionType();
// baseMessage.SetMac(mac);
// baseMessage.SetSn(sn);
// baseMessage.SetContent(coreContent);
// baseMessage.SetCrc(crc);
// baseMessage.SetRaw(bytes);
// baseMessage.SetProtocolVersion((String.valueOf(protocolVersion)));
// baseMessage.SetSerial(serial);
// baseMessage.SetBusinessType(businessType);
// baseMessage.SetFunctionType(functionType);
return(new BaseMessage()
{
Mac = mac,
Sn = sn,
Content = coreContent,
Crc = crc,
Raw = bytes,
Serial = serial,
FunctionType = funcCode,
BusinessType = bizCode,
ProtocolVersion = Convert.ToString(protocolVersion)
});
}
catch (Exception e)
{
// log.error("解析异常： bytes = {}", BytesUtil.bytes2HexWithBlank(bytes, true));
// e.printStackTrace();
Console.WriteLine(e.Message);
return(null);
}
}