huge madwifi update (work in progress, disabled by default, compiles but breaks at...
[openwrt.git] / package / madwifi / patches-r3776 / 320-hidden_ssid.patch
1 This patch fixes the detection of hidden SSIDs as transmitted
2 by some cisco systems.
3
4 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
5
6 Index: madwifi-trunk-r3776/net80211/ieee80211_scan_sta.c
7 ===================================================================
8 --- madwifi-trunk-r3776.orig/net80211/ieee80211_scan_sta.c      2008-07-17 03:10:02.000000000 +0200
9 +++ madwifi-trunk-r3776/net80211/ieee80211_scan_sta.c   2008-07-17 04:02:41.000000000 +0200
10 @@ -209,6 +209,19 @@
11                 ieee80211_saveie(iep, ie);
12  }
13  
14 +
15 +static inline int is_empty_ssid(u_int8_t *ssid)
16 +{
17 +       if (!ssid)
18 +               return 1;
19 +       if (ssid[1] == 0)
20 +               return 1;
21 +       if ((ssid[1] == 1) && (ssid[2] == 0))
22 +               return 1;
23 +       return 0;
24 +}
25 +
26 +
27  /*
28   * Process a beacon or probe response frame; create an
29   * entry in the scan cache or update any previous entry.
30 @@ -252,8 +265,8 @@
31         ise = &se->base;
32  
33         /* XXX ap beaconing multiple ssid w/ same bssid */
34 -       if (sp->ssid[1] != 0 &&
35 -           (ISPROBE(subtype) || ise->se_ssid[1] == 0))
36 +       if (!is_empty_ssid(sp->ssid) &&
37 +           (ISPROBE(subtype) || is_empty_ssid(ise->se_ssid)))
38                 memcpy(ise->se_ssid, sp->ssid, 2 + sp->ssid[1]);
39  
40         memcpy(ise->se_rates, sp->rates,