QNetworkReply returns the same error QNetworkReply::HostNotFoundError both when no network available, and wrong url

QNetworkReply returns the same error for these following two scenario
1. No network available. For example on Symbian device, no SIM card and no WLAN at all.
2. With network connection, but wrong url for example www.gggguobla.com.

This two situation should return different error.