Linux环境下自己构建包packet，包括MAC头部，UDP、TCP头部，以及数据及校验和计算，构建完包之后用原始套接字来进行发送-After the Linux environment to build their own package packet, including the MAC header, UDP, TCP header, and data and checksum calculation, build complete package with a raw socket t

基于OK210的开发板上，可以用来修改WINCE生成的bootimage.nb0文件的checksum头信息，以致于在硬件上不会发成错误。-OK210-based development board can be used to modify header information WINCE checksum generated bootimage.nb0 file, so that the error does not occur to the hardware