创建原始套接字，构造ICMP协议ECHO数据头，发送数据sendto 接收数据recvfrom，分析返回IP数据头及ICMP数据头 程序代码极其简单，适合初学网...

c#编的客户端程序，可以发送文件也可以接收文件，适合初次使用c#的用户学习socket编程用-c# addendum to the client program can send documents can also receive documents, suitable for initial use of the c# programming socket users with learning

Download:网页下载工具 用来通过HTTP协议下载的程序，支持断点续传和多线程下载。 注意，该程序一次只能下载一个任务，那个列表虽然可以拉很多进去，不过是摆设。-Download : website tools to the adoption of the HTTP protocol to download procedures, support HTTP download and multithreading. Note that this procedure can only be downloaded once a task that although the list can pull into the lot, but yes display.

代理类的实现例子-example of the realization category

利用ICMP报文格式，兼容IPV4和IPV6下的Ping程序，在SP6下无需调试，即可编译，VS2005下也可-The use of ICMP message format, compatible with IPV4 and IPV6 under the Ping program, under the SP6 without debugging, you can compile, VS2005, may also

面向连接的服务器流程中，必须设置服务器套接字为监听状态；而客户机则是主动连接。无连接客户机和服务器。无连接客户机和服务器在调用的函数方面没有区别，区别在于服务器一般先启动recvfrom等待客户机的数据。客户机和服务器的通信过程为客户向服务器发送数据，服务器收到数据后给予应答，通信结束。-connection-oriented server process, you must set up to monitor server socket state; While the client is active connector. Without connecting client and server. Without connecting client and server in a function called no distinction, the general difference is the server for first launching recvfrom client data. Client and server communication process for clients to send data to the server, the server data received responses and communication end.

该程序可以实现基本的包过滤，包过滤作为最基本的防火墙基层策略是属于比较早起的防火墙开发思路。从这个源码中你可以看到早期的防火墙的基本开发流程，这相信对你以后独立防火墙的编码有所帮助。

网络编程方面的例子，呵呵，一定要将我的开通啊-of network programming examples Oh, I will definitely include the opening ah

完全是个人编写的一个FTP服务器，功能不是很全，但应该有一定的参考价值。-is prepared by a personal FTP server function is not all, but there should be some reference value.

使用ICMP.DLL和MIB.DLL实现ping, tracert, netstat -Using ICMP.DLL and MIB.DLL to implement ping, tracert and netstat

使用winpcap非阻塞式抓取包（需要winpcap 库）-winpcap use nonblocking packet-capture (need winpcap Treasurer)