最近公司安排我和另一个同事一起完成一个Socket通信服务器，多个Socket通信客户端，具体的是服务器在window系统下c#开发，客户端是在liunx系统下开发，实现交互通讯。Socket通信服务器启动时，Socket将侦听到的Socket连接传给接受Socket，然后由接受Socket完成接受、发送消息，当Socket存在异常时，断开连接。我负责服务器端功能，所以我这里简单说下我服务器的功能:

1、服务器一直监听当前客户端是否有连接

2、动态的保留当前有连接状态的客户端

3、服务器端和客户端进行交互数据

public void StartListenUp()
IPAddress myIP = GetIPAddress();
IPEndPoint localEndPoint = new IPEndPoint(myIP, _port);
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

listener.Bind(localEndPoint);
listener.Listen(10);
string userIP;

while (true)
Socket newClient = listener.Accept();
userIP = ((IPEndPoint)newClient.RemoteEndPoint).Address.ToString();
_transmit_IP.Add(userIP, newClient);
Thread clientThread = new Thread(new ParameterizedThreadStart(ThreadFun));
clientThread.Start(userIP);
catch (Exception e)
Console.WriteLine(e.ToString());

/// 线程执行体,消息传递给线程执行体的用户名，用以与用户通信
private void ThreadFun(object obj)
//通过转发表得到当前用户套接字
Socket handler = _transmit_IP[obj] as Socket;

// 业务处理

以上是服务器的主要代码并已经和客户端测试通过

希望大家批评指正。。。

ps：听人劝吃饱饭，查看了微软最新异步通讯的例子调试了下

代码如下：

public static void StartListening()
// Data buffer for incoming data.
byte[] bytes = new Byte[1024];

// Establish the local endpoint for the socket.
// The DNS name of the computer
// running the listener is "host.contoso.com".
IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);

// Create a TCP/IP socket.
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

// Bind the socket to the local endpoint and listen for incoming connections.
listener.Bind(localEndPoint);
listener.Listen(100);

while (true)
// Set the event to nonsignaled state.
allDone.Reset();

// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(new AsyncCallback(AcceptCallback), listener);

// Wait until a connection is made before continuing.
allDone.WaitOne();
catch (Exception e)
Console.WriteLine(e.ToString());
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();

public static void AcceptCallback(IAsyncResult ar)
// Signal the main thread to continue.
allDone.Set();

// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);

// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);

public static void ReadCallback(IAsyncResult ar)
String content = String.Empty;

// Retrieve the state object and the handler socket from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;

// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);

if (bytesRead > 0)
// There  might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));

// Check for end-of-file tag. If it is not there, read more data.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
// All the data has been read from the client. Display it on the console.
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}", content.Length, content);
// Echo the data back to the client.
Send(handler, content);
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);

private static void Send(Socket handler, String data)
// Convert the string data to byte data using ASCII encoding.
byte[] byteData = Encoding.ASCII.GetBytes(data);

// Begin sending the data to the remote device.
handler.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), handler);

private static void SendCallback(IAsyncResult ar)
// Retrieve the socket from the state object.
Socket handler = (Socket)ar.AsyncState;

// Complete sending the data to the remote device.
int bytesSent = handler.EndSend(ar);
Console.WriteLine("Sent {0} bytes to client.", bytesSent);

handler.Shutdown(SocketShutdown.Both);
handler.Close();

catch (Exception e)
Console.WriteLine(e.ToString());

本文转自夜&枫博客园博客，原文链接：http://www.cnblogs.com/newstart/archive/2012/08/28/2660650.html，如需转载请自行联系原作者

Android C++系列：Linux Socket编程（四）多路IO转接服务器 ECS云服务器简单使用方法以及linux下c++socket搭建web服务器 使用Java Socket手撸一个http服务器