SOCKET例子.doc

1.简单服务器 //#include winsock2.h //#pragma comment(lib,WS2_32.lib) WSADATA wsd; static UINT port=%%1; UINT Listen(LPVOID pParam) { SOCKET sServer,sClient; char buf[1024]; int retVal; if(WSAStartup(MAKEWORD(2,2),wsd)!=0) { return -1;//失败 } sServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(INVALID_SOCKET==sServer) { WSACleanup(); return -1;//创建套接字失败 } SOCKADDR_IN addrServ; 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;//绑定套接字失败 } retVal=listen(sServer,1); if(SOCKET_ERROR==retVal) { closesocket(sServer); WSACleanup(); return -1;//开始监听失败 } sockaddr_in addrClient; int addrClientlen=sizeof(addrClient); sClient=accept(sServer,(sockaddr FAR*)addrClient,addrClientlen); if(INVALID_SOCKET==sClient) { closesocket(sServer); WSACleanup(); return -1;//开始接受客户端连接失败 } ZeroMemory(buf,sizeof(buf)); retVal=recv(sClient,buf,sizeof(buf),0); if(SOCKET_ERROR==retVal) { closesocket(sServer); closesocket(sClient); WSACleanup(); return -1;//接收数据失败 } CString %%2(buf); closesocket(sServer); closesocket(sClient); WSACleanup(); return 0; } CWinThread *pThread=AfxBeginThread(Listen,port); 2.简单客户端 //#include winsock2.h //#pragma comment(lib,WS2_32.lib) WSADATA wsd; SOCKET sHost; SOCKADDR_IN servAddr; char buf[1024]; int retVal; if(WSAStartup(MAKEWORD(2,2),wsd)!=0) { return -1;//失败 } sHost=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(INVALID_SOCKET==sHost) { WSACleanup(); return -1;//创建套接字失败 } servAddr.sin_family=AF_INET; servAddr.sin_addr.s_addr=inet_addr(%%3); servAddr.sin_port=htons((short)%%2); int nServAddlen=sizeof(servAddr); retVal=connect(sHost,(LPSOCKADDR)servAddr,sizeof(servAddr)); if(SOCKET_ERROR==retVal) { closesocket(sHost); WSACleanup(); return -1;//连接服务器失败 } ZeroMemory(buf,sizeof(buf)); strcpy(buf,%%3); retVal=send(sHost,buf,sizeof(buf),0); if(SOCKET_ERROR==retVal) { closesocket(sHost); WSACl