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            aurain
            技術文摘
            posts - 137,  comments - 268,  trackbacks - 0
            Socket 編程最基本的模型就是 Berkeley Socket

                      具體的實現也就是按這個流程圖來做的,這里重點是服務端的實現。

            int APIENTRY _tWinMain(HINSTANCE hInstance,
                                  HINSTANCE hPrevInstance,
                                  LPTSTR     lpCmdLine,
                                 
            int        nCmdShow)
            {
                        ofstream logfile(
            "LogFile.txt");
                       
            //Initialize winsock
                        WSADATA wsaData;
                        
            int iResult = WSAStartup( MAKEWORD(2,2), &wsaData);
                        
            if(iResult != NO_ERROR)
                         {
                                 logfile
            <<"Error at WSAStartup() ";    
                                 logfile.close();
                                
            return 1;
                         }
                        
            else    
                                logfile
            <<"Initialize WSAStartup OK!";
                
                         
            // Create a socket.
                         SOCKET serverSocket;
                         serverSocket
            = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

                         
            if(serverSocket == INVALID_SOCKET)
                          {    
                                  logfile
            <<"Error at socket():"<<WSAGetLastError()<<endl;;
                                  logfile.close();
                                  WSACleanup();
                                  
            return 1;
                          }
                         
            else
                         {
                                  logfile
            <<"Create socket OK!";
                          }

                        
            // Bind the socket.
                          sockaddr_in service;

                          service.sin_family
            =AF_INET;
                          service.sin_addr.s_addr
            =inet_addr(HostIp.c_str());
                          service.sin_port
            =htons(PORT);

                          
            if (bind(serverSocket,(SOCKADDR*)&service,sizeof(service))==SOCKET_ERROR)
                          {
                                   logfile
            <<"bind() failed"<<GetLastError()<<endl;
                                   closesocket(serverSocket);
                                   logfile.close();
                                  
            return 1;
                          }
                         
            else
                          {
                         logfile
            <<"Binding OK!"<<endl;
                           }
                
                
                          
            // Listen on the socket.
                           if(listen(serverSocket,1)==SOCKET_ERROR)
                           {
                                   logfile
            <<"Error listening on socket"<<GetLastError()<<endl;
                                   logfile.close();
                            }
                           
            else
                            {
                                   logfile
            <<"Listening..."<<endl;
                             }

                            
            // Accept connections.
                             SOCKET clientSocket;
                             sockaddr_in clientAddr;
                            
            int clientAddrLen=sizeof(clientAddr);
               
                            
            while(true)
                             {
                                        clientSocket
            = SOCKET_ERROR;
                                       
            while(clientSocket==SOCKET_ERROR)
                                        {
                                               clientSocket
            =accept(serverSocket,(struct sockaddr*)&clientAddr,&clientAddrLen);      
                                         }
                                        ReceiveData(clientSocket);    
                               }   

                               closesocket(serverSocket);
                               closesocket(clientSocket);

                              
            return 0;
            }

            //Receive the data
            void ReceiveData(SOCKET& clientSocket)
            {    
                        
            int bytesSent;
                        
            int bytesRecv=SOCKET_ERROR;
                        
            string sendbuf="";
                        
            char recvbuf[32]="";
                
                        
            while(bytesRecv ==SOCKET_ERROR)
                         {
                                   bytesRecv
            =recv(clientSocket,recvbuf,32,0);
                
                                    sendbuf
            ="Received: "+(string)recvbuf;
                                    bytesSent
            =send(clientSocket,sendbuf.c_str(),(unsigned int)(sendbuf.size()),0);

                                    bytesRecv
            =SOCKET_ERROR;
                                    memset(recvbuf,
            '\0',32);
                         }
                        return;
            }

                      在接收客戶端發來數據的地方要做成死循環,如果需要斷開連接,則由客戶斷發送特定的消息然后進行處理。還有需要注意的是上面的HostIp是本機的IP地址,PORT是套接字需要綁定的端口。

            posted on 2008-02-25 13:40 閱讀(986) 評論(0)  編輯 收藏 引用 所屬分類: socket編程

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