实现服务器端的多线程SOCKET Server C++/VC

想要实现的功能:在服务器端有一个控制台程序(或者Windows服务),与多个客户端程序通讯,其中主线程有一个socket绑定在一个固定端口上,负责监听客户端的Socket信息。每当启动一个客户端程序,客户端发送来一个socket连接请求,server端就新开启一个线程,并在其中创建一个socket与该客户端的socket通讯,直到客户端程序关闭,结束该线程。主线程中的socket在应用程序退出时关闭。

这里是Server端代码的简单示意,展示了如何创建多线程的Socket Server。

#include  "StdAfx.h" 
#include  <stdio.h> 
 
DWORD  WINAPI  AnswerThread(LPVOID  lparam) 

           SOCKET  ClientSocket=(SOCKET)(LPVOID)lparam; 
 
           int  bytesRecv; 
           char  sendbuf[32]=""; 
           char  recvbuf[32]=""; 
 
           while(1) 
           { 
                       bytesRecv=SOCKET_ERROR; 
                       for(int  i=0;i<(int)strlen(recvbuf);i++) 
                       {   recvbuf[i]=´\0´;  }

 
                       while(bytesRecv==SOCKET_ERROR) 
                       {  //Receiving Data
                                   bytesRecv=recv(ClientSocket,recvbuf,32,0); 
                       } 

                     

                       //Write your processing code here
                       send(ClientSocket,recvbuf,strlen(recvbuf),0); 
                       printf("%s\n",recvbuf); 
           } 
           return  0; 

 
int  main(int  argc,char*  argv[]) 

           //initialize  Winsock 
           WSADATA  wsaData; 
           int  iRet=WSAStartup(MAKEWORD(2,2),&wsaData); 
           if(iRet!=NO_ERROR) 
                       printf("Error  at  WSAStartup()\n"); 
            
           //create  a  socket 
           SOCKET  m_socket; 
           m_socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); 
           if(m_socket==INVALID_SOCKET) 
           { 
                       printf("Error  at  socket():%ld\n",WSAGetLastError()); 
                       WSACleanup(); 
                       return  0; 
           } 
 
           //bind  a  socket 
           sockaddr_in  service; 
           service.sin_family=AF_INET; 
           service.sin_addr.s_addr=inet_addr("172.16.3.250"); 
           service.sin_port=htons(2501); 
 
           if(bind(m_socket,(SOCKADDR*)&service,sizeof(service))==SOCKET_ERROR) 
           { 
                       printf("bind()  failed.\n"); 
                       closesocket(m_socket); 
                       return  0; 
           } 
           else 
                       printf("bind  OK.\n"); 
 
           //listen  on  a  socket 
           if(listen(m_socket,20)==SOCKET_ERROR) 
                       printf("Error  listening  on  socket.\n"); 
           else 
                       printf("listening  ok.\n"); 
 
           //accept  a  connection 
           SOCKET  AcceptSocket; 
            
           printf("Waiting  for  a  client  to  connect…\n"); 
           while(1) 
           { 
                       AcceptSocket=SOCKET_ERROR; 
                       while(AcceptSocket==SOCKET_ERROR) 
                       { 
                                   AcceptSocket=accept(m_socket,NULL,NULL); 
                       } 
                       printf("Client  Connected.\n"); 
                        
                       DWORD  dwThreadId; 
                       HANDLE  hThread; 
                        
                       hThread=CreateThread(NULL,NULL,            AnswerThread, 
                                   (LPVOID)AcceptSocket,0,&dwThreadId); 
                       if(hThread==NULL) 
                       { 
                                   printf("CreatThread  AnswerThread()  failed.\n"); 
                       } 
                       else 
                       { 
                                   printf("CreateThread  OK.\n"); 
                       } 
           } 
           return  0; 
}

Socket的客户端程序就很简单了,可以使用VB拖一个WinSock控件到Form中,然后连接服务器的Socket并发送数据就行了。