linux下tcp和udp应用接口的一个简单的封装，提供源码和makefile，可直接编译成动态库，到用的时候直接调用，不用再一个一个的调用原始的网络接口-A simple package under linux tcp and udp application interface, providing the source code and makefile, can be directly translated into a dynamic library to use when called directly, no need to call the original one by one network interface