public static QProtocolByteArrayField fetchDestMac(byte[] data, int headerOffset) {
int fieldOffset = headerOffset + 0;
int fieldLen = 6;
byte[] value = BytesUtil.copyBytes(data, fieldOffset, fieldLen);
QProtocolByteArrayField field = new QProtocolByteArrayField();
field.init(fieldOffset, fieldLen, "destMac", "目的网卡地址");
field.setValue(value);
return field;
}