On Monday 24 November 2008, Holger Schurig wrote:
> > When I do a scan after having loaded the driver, the iwlist
> > can't report the SSID because it's hidden. I don't know if
> > this is a problem but I have noticed that the reported SSIDs
> > of the two APs are a little bit different. With the 3com AP
> > (the working one) I get ESSID:" " (1 char blank string) while
> > with the Sitecom AP ESSID:"" (0 chars empty string).
>
> Okay, that could very well be the problem.
Ok, I think I have found because the association request doesn't take place.
In mlme.c there is the function ieee80211_sta_match_ssid(). My AP is
broadcasting a fake SSID string '\0' with length 0. The function returns 0
instead of 1.
I don't understand the meaning of the following code:
hidden_ssid = 1;
tmp = ssid_len;
while (tmp--) {
if (ssid[tmp] != '\0') {
hidden_ssid = 0;
break;
}
}
if (hidden_ssid && ifsta->ssid_len == ssid_len)
return 1;
if (ssid_len == 1 && ssid[0] == ' ')
return 1;
Of course hidden_ssid stays 1: why do I have to verify that the two lengths
are equal? Conversely hidden_ssid goes 0 also when it's really hidden (e.g.
SSID ' ').
The code treats the strings ' ' as a jolly (independently of hidden_sid), why
isn't the same for the empty string ''?
I have applied the following patch, now I'm able to associate.
--- mlme.c.orig 2008-11-25 00:39:00.000000000 +0100
+++ mlme.c 2008-11-25 00:40:03.000000000 +0100
@@ -2029,6 +2029,9 @@ static int ieee80211_sta_match_ssid(stru
if (ssid_len == 1 && ssid[0] == ' ')
return 1;
+ if (ssid_len == 0 && ssid[0] == '\0')
+ return 1;
+
return 0;
}
Regards,
Fabio
--
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
