On Thu, May 20, 2010 at 4:30 PM, Dan Williams <dcbw@xxxxxxxxxx> wrote: > On Thu, 2010-05-20 at 15:40 -0400, leo liang wrote: >> Hi, >> >> Does any one know that if the application send "\0" as essid to >> mac80211, how it handle this case? > > What are you trying to do? Are you trying to work with a hidden AP, or > do something else? I want to hide the associated AP name. Or disassociate and do not let the interface connect to any AP. > > An SSID is simply a 32-byte array; the protocol and the stack don't care > what's in that array. So while you can't use command-line tools like > 'iwconfig' to send an SSID containing a \0, you can use netlink or > wpa_supplicant's nl80211 driver to do so. I checked "iwconfig" source code, if you run "iwconfig wlan0 essid off", it will set the first char as "\0". > > But in the end, if you're trying to associate with an AP that has an > SSID of only '\0', that AP is likely broken or trying to hide it's SSID, > and you should be using the real SSID of that AP instead of '\0'. > > Dan > > > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
