说明：  基于linux socket can程序，主要功能： 程序具备全部CAN功能，包括CAN标准帧/扩展帧接收与发送、CAN总线错误判断、环回等功能 适用基于LINUX SOCKET机制实现的CAN接口，可用于嵌入式LINUX的CAN测试 程序采用标准LINUX命令行参数选项形式，接受用户参数
(Based on the Linux socket can program, the main functions: The program has all CAN functions, including CAN standard frame / extended frame receiving and sending, CAN bus error judgment, loop return and so on. The CAN interface based on the LINUX SOCKET mechanism can be applied to the CAN test of embedded LINUX The program takes the form of the standard LINUX command line parameter options to accept user parameters)