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madwifi: recognize hidden essid with length=1 containing a nullbyte

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SVN-Revision: 11793
This commit is contained in:
Felix Fietkau 2008-07-12 22:23:46 +00:00
parent 59373f6fda
commit 53bbcb6ad4
1 changed files with 38 additions and 0 deletions
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38
package/madwifi/patches/356-hidden_ssid.patch Normal file
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@ -0,0 +1,38 @@
This patch fixes the detection of hidden SSIDs as transmitted
by some cisco systems.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/net80211/ieee80211_scan_sta.c
+++ b/net80211/ieee80211_scan_sta.c
@@ -209,6 +209,19 @@
ieee80211_saveie(iep, ie);
}
+
+static inline int is_empty_ssid(u_int8_t *ssid)
+{
+ if (!ssid)
+ return 1;
+ if (ssid[1] == 0)
+ return 1;
+ if ((ssid[1] == 1) && (ssid[2] == 0))
+ return 1;
+ return 0;
+}
+
+
/*
* Process a beacon or probe response frame; create an
* entry in the scan cache or update any previous entry.
@@ -252,8 +265,8 @@
ise = &se->base;
/* XXX ap beaconing multiple ssid w/ same bssid */
- if (sp->ssid[1] != 0 &&
- (ISPROBE(subtype) || ise->se_ssid[1] == 0))
+ if (!is_empty_ssid(sp->ssid) &&
+ (ISPROBE(subtype) || is_empty_ssid(ise->se_ssid)))
memcpy(ise->se_ssid, sp->ssid, 2 + sp->ssid[1]);
memcpy(ise->se_rates, sp->rates,