1.簡單服務器//#include//#pragmacomment(lib,"WS2_32.lib")WSADATAwsd;staticUINTport=%%1;UINTListen(LPVOIDpParam){SOCKETsServer,sClient;charbuf[1024];intretVal;if(WSAStartup(MAKEWORD(2,2),&wsd)!=0){return-1;//失敗}sServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);if(INVALID_SOCKET==sServer){WSACleanup();return-1;//創建套接字失敗}SOCKADDR_INaddrServ;addrServ.sin_family=AF_INET;addrServ.sin_port=htons((short)pParam);addrServ.sin_addr.s_addr=INADDR_ANY;retVal=bind(sServer,(LPSOCKADDR)&addrServ,sizeof(SOCKADDR_IN));if(SOCKET_ERROR==retVal){closesocket(sServer);WSACleanup();return-1;//綁定套接字失敗}retVal=listen(sServer,1);if(SOCKET_ERROR==retVal){closesocket(sServer);WSACleanup();return-1;//開始監聽失敗}sockaddr_inaddrClient;intaddrClientlen=sizeof(addrClient);sClient=accept(sServer,(sockaddrFAR*)&addrClient,&addrClientlen);if(INVALID_SOCKET==sClient){closesocket(sServer);WSACleanup();return-1;//開始接受客戶端連接失敗}ZeroMemory(buf,sizeof(buf));retVal=recv(sClient,buf,sizeof(buf),0);if(SOCKET_ERROR==retVal){closesocket(sServer);closesocket(sClient);WSACleanup();return-1;//接收數據失敗}CString%%2(buf);closesocket(sServer);closesocket(sClient);WSACleanup();return0;}CWinThread*pThread=AfxBeginThread(Listen,&port);2.簡單客戶端//#include//#pragmacomment(lib,"WS2_32.lib")WSADATAwsd;SOCKETsHost;SOCKADDR_INservAddr;charbuf[1024];intretVal;if(WSAStartup(MAKEWORD(2,2),&wsd)!=0){return-1;//失敗}sHost=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);if(INVALID_SOCKET==sHost){WSACleanup();return-1;//創建套接字失敗}servAddr.sin_family=AF_INET;servAddr.sin_addr.s_addr=inet_addr(%%3);servAddr.sin_port=htons((short)%%2);intnServAddlen=sizeof(servAddr);retVal=connect(sHost,(LPSOCKADDR)&servAddr,sizeof(servAddr));if(SOCKET_ERROR==retVal){closesocket(sHost);WSACleanup();return-1;//連接服務器失敗}ZeroMemory(buf,sizeof(buf));strcpy(buf,%%3);retVal=send(sHost,buf,sizeof(buf),0);if(SOCKET_ERROR==retVal){closesocket(sHost);WSACleanup();return-1;//向服務器發送數據失敗}closesocket(sHost);WSACleanup();3.獲得本機IP//#include//#pragmacomment(lib,"WS2_32.lib")WSADATAwsd;if(WSAStartup(MAKEWORD(2,2),&wsd)!=0){return-1;//失敗}charszHostname[100],szHostaddress[200];if(gethostname(szHostname,sizeof(szHostname))!=SOCKET_ERROR){HOSTENT*pHostEnt=gethostbyname(szHostname);if(pHostEnt!=NULL){sprintf(szHostaddress,"%d.%d.%d.%d",(pHostEnt->h_addr_list[0][0]&0x00ff),(pHostEnt->h_addr_list[0][1]&0x00ff),(pHostEnt->h_addr_list[0][2]&0x00ff),(pHostEnt->h_addr_list[0][3]&0x00ff));}}elsereturn;CString%%1(szHostaddress);4.端對端通信//#include//#pragmacomment(lib,"WS2_32.lib")WSADATAwsd;SOCKETs;charbuf[1024];if(WSAStartup(MAKEWORD(2,2),&wsd)!=0){return-1;//失敗}s=socket(AF_INET,SOCK_DGRAM,0);if(s==INVALID_SOCKET){WSACleanup();return-1;//創建套接字失敗}SOCKADDR_INservAddr;servAddr.sin_family=AF_INET;servAddr.sin_addr.s_addr=inet_addr(%%1);servAddr.sin_port=htons(INADDR_ANY);if(bind(s,(SOCKADDR*)&servAddr,sizeof(SOCKADDR_IN))==SOCKET_ERROR){closesocket(s);WSACleanup();return-1;//綁定套接字失敗}intnServAddrlen=sizeof(servAddr);ZeroMemory(buf,sizeof(buf));if(recvfrom(s,buf,sizeof(buf),0,(SOCKADDR*)&servAddr,&nServAddrlen)==SOCKET_ERROR){closesocket(s);WSACleanup();return-1;//接收數據失敗}CString%%2(buf);ZeroMemory(buf,sizeof(buf));strcpy(buf,%%3);SOCKADDR_INclientAddr;clientAddr.sin_family=AF_INET;clientAddr.sin_addr.s_addr=inet_addr(%%4);clientAddr.sin_port=htons((short)%%5);intnClientlen=sizeof(clientAddr);if(sendto(s,buf,sizeof(buf),0,(SOCKADDR*)&clientAddr,nClientlen)==SOCKET_ERROR){closesocket(s);WSACleanup();return-1;//向服務器發送數據失敗}closesocket(s);WSACleanup();5.點對點通信//#include//#pragmacomment(lib,"WS2_32.lib")WSADATAwsd;SOCKADDR_INaddrServ,addrServ2;SOCKETsServer,sClient,sHost;intretVal;sockaddr_inaddrClient;charbuf[1024];staticUINTport=%%2;BOOLlistenerRun=TRUE;UINTListen(LPVOIDpParam){addrServ.sin_family=AF_INET;addrServ.sin_port=htons((UINT)pParam);addrServ.sin_addr.s_addr=INADDR_ANY;retVal=bind(sServer,(LPSOCKADDR)&addrServ,sizeof(SOCKADDR_IN));if(SOCKET_ERROR==retVal){closesocket(sServer);WSACleanup();return-1;//綁定套接字失敗}retVal=listen(sServer,1);if(SOCKET_ERROR==retVal){closesocket(sServer);WSACleanup();return-1;//開始監聽失敗}intaddrClientlen=sizeof(addrClient);sClient=accept(sServer,(sockaddrFAR*)&addrClient,&addClientlen);if(INVALID_SOCKET==sClient){closesocket(sServer);WSACleanup();return-1;//接收客戶端請求失敗}while(listenerRun){ZeroMemory(buf,sizeof(buf));retVal=recv(sClient,buf,sizeof(buf));if(SOCKET_ERROR==retVal){closesocket(sServer);closesocket(sClient);WSACleanup();return-1;//接收客戶端數據失敗}CString%%4(buf);}}if(WSAStartup(MAKEWORD(2,2),&wsd)!=0){return-1;//失敗}sServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);if(INVALID_SOCKET==sServer){WSACleanup();return-1;//創建套接字失敗}CWinThread*pThread=AfxBeginThread(Listen,&port);sHost=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);if(INVALID_SOCKET==sHost){WSACleanup();return-1;//創建套接字失敗}servAddr2.sin_family=AF_INET;servAddr2.sin_addr.s_addr=inet_addr(%%1);servAddr.sin_port=htons((short)%%3);intnServerAddrlen=sizeof(servAddr2);retVal=connect(sHost,(LPSOCKADDR)&servAddr2,sizeof(servAddr2));if(SOCKET_ERROR==retVal){closesocket(sHost);WSACleanup();return-1;//連接失敗}zeroMemory(buf,sizeof(buf));strcpy(buf,%%5);retVal=send(sHost,buf,sizeof(buf),0);if(SOCKET_ERROR==retVal){closesocket(sHost);WSACleanup();return-1;//向發送數據失敗}listenerRun=FALSE;DWORDdwExitCode;::GetExitCodeThread(pThread->m_hThread,&dwExitCode);pThread=null;closesocket(sServer);closesocket(sClient);closesocket(sHost);WSACleanup();
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