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);
}