From: Volker Braun <vbraun@xxxxxxxxxxxxxxxxx>
Work-around for broken APs that use a non-zero key index for WEP
pairwise keys. With this patch, WEP encryption only is exempt from
providing a zero key index.
Signed-off-by: Volker Braun <volker.braun@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
net/mac80211/ieee80211_ioctl.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
--- wireless-dev.orig/net/mac80211/ieee80211_ioctl.c 2007-08-30 14:35:32.912051253 +0200
+++ wireless-dev/net/mac80211/ieee80211_ioctl.c 2007-08-30 14:35:37.972051253 +0200
@@ -416,17 +416,23 @@ static int ieee80211_set_encryption(stru
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (idx < 0 || idx >= NUM_DEFAULT_KEYS) {
+ printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n",
+ dev->name, idx);
+ return -EINVAL;
+ }
+
if (is_broadcast_ether_addr(sta_addr)) {
sta = NULL;
- if (idx >= NUM_DEFAULT_KEYS) {
- printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n",
- dev->name, idx);
- return -EINVAL;
- }
key = sdata->keys[idx];
} else {
set_tx_key = 0;
- if (idx != 0) {
+ /*
+ * According to the standard, the key index of a pairwise
+ * key must be zero. However, some AP are broken when it
+ * comes to WEP key indices, so we work around this.
+ */
+ if (idx != 0 && alg != ALG_WEP) {
printk(KERN_DEBUG "%s: set_encrypt - non-zero idx for "
"individual key\n", dev->name);
return -EINVAL;
-
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