recvfrom

简化Sock连接。采用队列保存Sock的收发消息包，保证消息的处理顺序。(Simplify the Sock connection)

利用哈希运算产生服务端和客户端的通信密钥( Produces the service end and the customer end correspondence key using the Hasche operation )

基于Winpcap的网络数据包抓取.开发环境VS2013(network packet capture based on Winpcap . Development environment: VS2013)

它是一个c/s网络编程框架，基于对boost.asio的包装（最低在boost-1.49.0上调试过），目的是快速的构建一个c/s系统；效率高、跨平台、完全异步，当然这是从boost.asio继承而来； 自动重连，数据透明传输，自动解决分包粘包问题（这一特性表现得与udp一样）； 只支持tcp和udp协议；(It is a c/s network programming framework, based on boost.asio package (minimum tried to increase the boost-1.49.0), the purpose is to build a fast c/s systems efficient, cross-platform, fully asynchronous, Of course, this is from boost.asio inherited Auto-reconnect, transparent data transmission, automatic sub-stick package to solve the problem (this feature behave the same with udp) Only supports tcp and udp protocol )

通过网络编程采集数据并实时在界面上显示，集成了自己编写的类。(Through data collection and real-time network programming displayed on the interface that integrates their preparation classes.)

说明：  winpcap3.2的源代码,可以供研究网络捕获程序之用(winpcap3.2 the source code, can capture network for research procedures used)

UDP方式双网冗余程序，一网卡断开，另一网卡自动连接，从而保证通讯正常(UDP mode dual-network redundancy procedures, disconnect a network card, another card to connect automatically to ensure the normal communication)

本书主要介绍了如何用API函数进行网络间通信(The book introduces how to use the API function communication networks)

程序记录并显示了数据报从源端机器传送到目标机器的过程中所经过的路由器的IP地址，并且记录了数据报到达每个路由器所需要的时间。认真观察到达每个路由器的时间有什么区别，从而熟练掌握traceroute的工作原理和ICMP报文协议。　(The program records and displays the IP addresses of routers through which the datagram sent from the source client machine to the target machine , and the recording of the data packets arrive at the time required by each router . )

端口扫描器。 本扫描器实现了：TCP Connect 扫描，TCP SYN扫描，TCP Fin扫描，TCP ACK扫描及UDP端口扫描,这些扫描能够实现扫描特定IP地址范围内端口和扫描某IP地址范围内全部主机特定端口两种模式，并且SYN扫描能够区分端口开放、端口关闭和被防火墙过滤三种状态。(Port scanner. The scanner realized: TCP Connect Scan, TCP SYN Scan, TCP Fin Scan, TCP ACK scan and UDP port scan, the scan can scan a specific IP address range of ports and scanning a range of IP addresses all host two specific ports mode, and can distinguish SYN scan open ports, port closed and the three states firewall filters.)