Linux环境下开发的一段ping代码，主要配合MySQL数据结构，对学校所管理的接入层交换机连通性进行测试，与之配套的还有交换机状态显示和管理界面，这只是循环测试连通性的代码部分。-Under Linux development environment for some ping code, mainly with MySQL data structures, the school managed access layer switch connectivity tests, as well as ancillary switch status display and management interface, it' s just cycling test connectivity code section.