校验和计算器，对于网络协议需要加校验和功能，去掉包头。包尾，自动计算-Checksum calculator, check for network protocols and functions need to add, remove header. Rear, automatic calculation

异或校验工具。十六进制异或值计算。。。。。。。。。。(XOR check tool. Sixteen decimal XOR calculation.)