这是一个我们项目中用到的网络相关的源码包，编译环境为Linux，我们项目是ARM平台交叉编译，包内实现的内容包括ftp收发、网络时间同步和SMTP邮件发送协议，可以直接使用。-This is the one we used in the project network-related source, compile environment for Linux, our project is cross-compiling ARM platform, within the implementation of the package include ftp transceiver, network time synchronization and SMTP mail protocol that can be used directly.