windows下设置socket的connect超时

// widonws: 默认设置socket TCP client connect为阻塞模式
void TcpConnect(char* strIP, UINT nPort)
{struct sockaddr_in serverAddress;SOCKET hSocket &＃61; NULL;hSocket &＃61; socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if( hSocket&＃61;&＃61;INVALID_SOCKET){return;}memset(&serverAddress, 0, sizeof(serverAddress)); serverAddress.sin_family &＃61; AF_INET;serverAddress.sin_addr.s_addr &＃61; inet_addr(strIP); serverAddress.sin_port &＃61; htons((short)nPort); int iTimeOut &＃61; 3000;setsockopt(hSocket,SOL_SOCKET,SO_RCVTIMEO,(char*)&iTimeOut,sizeof(iTimeOut));setsockopt(hSocket,SOL_SOCKET,SO_SNDTIMEO,(char*)&iTimeOut,sizeof(iTimeOut)); if( SOCKET_ERROR&＃61;&＃61;connect(hSocket, (sockaddr*)&serverAddress, sizeof(serverAddress)) ){ closesocket(hSocket);DWORD gle &＃61; WSAGetLastError();return;}char buff[] &＃61; "hello";int sl&＃61;::send(hSocket,(char*)buff, sizeof(buff), 0);if( sl<0 ){closesocket(hSocket);return ;}closesocket(hSocket);
}// widonws: 设置socket TCP client connect非阻塞模式
void SockSelect(char* strIP, UINT nPort)
{SOCKET/*int*/ sockfd &＃61; socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if(sockfd <0) {return;}struct sockaddr_in serv_addr;//以服务器地址填充结构serv_addrserv_addr.sin_family &＃61; AF_INET;serv_addr.sin_addr.s_addr &＃61; inet_addr(strIP);serv_addr.sin_port &＃61; htons(nPort);int error &＃61; -1;int len &＃61; sizeof(int);timeval tm;fd_set set;unsigned long ul &＃61; 1;ioctlsocket(sockfd, FIONBIO, &ul); //设置为非阻塞模式bool ret &＃61; false;if( connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) &＃61;&＃61; -1){tm.tv_sec &＃61; 3;tm.tv_usec &＃61; 0;FD_ZERO(&set);FD_SET(sockfd, &set);if( select(sockfd&＃43;1, NULL, &set, NULL, &tm) > 0){getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *)&error, /*(socklen_t *)*/&len);if(error &＃61;&＃61; 0) ret &＃61; true;else ret &＃61; false;} else ret &＃61; false;}else ret &＃61; true;ul &＃61; 0;ioctlsocket(sockfd, FIONBIO, &ul); //设置为阻塞模式if(!ret) {closesocket( sockfd );fprintf(stderr , "Cannot Connect the server!/n");return;}fprintf( stderr , "Connected!/n");char buff[] &＃61; "hello";int sl&＃61;::send(sockfd,(char*)buff, sizeof(buff), 0);closesocket( sockfd );
}