connect(&socket, SIGNAL(connected()), this, SLOT(socketConnected()));
connect(&socket, SIGNAL(disconnected()), this, SLOT(quit()));
connect(&socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(socketError(QAbstractSocket::SocketError)));
connect(&socket, SIGNAL(connected()), this, SLOT(socketConnected()));
connect(&socket, SIGNAL(disconnected()), this, SLOT(quit()));
connect(&socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(socketError(QAbstractSocket::SocketError)));