基于TCP的文件传输，分为服务器端和客户端，客户端可以传输任意大小、任意格式的文件到服务器端，该源代码很好使，也易懂！,TCP-based file transfer, is divided into server-side and client, the client can transfer any size, any format of documents to the server side, the source code very well so that is also easy

监控网络，捕获一段时间内网络上的IP数据包，按IP数据包的源地址统计出该源地址在该时间段内发送的IP包的个数，将其写入日志文件中,统计出每个地址总的数据大小-Monitoring networks, capture IP packets on the network for some time, the statistics of the source address of IP packets sent during that time period the number of IP pack

ip2region是准确率99.9%的ip地址定位库，0.0x毫秒级查询，数据库文件大小只有2.7M，提供了java, php, c, python,nodejs,golang查询绑定和Binary,B树,内存三种查询算法，妈妈再也不同担心我的ip地址定位！(Ip2region is a IP library address location accuracy of 99.9% millisecond, 0.0x query, database file size is only 2.7M, P