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authorVolker Braun <vbraun@physics.upenn.edu>2007-09-14 11:10:25 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:30 -0700
commit139c3a0492745192f999aaa67d11cb63983211f5 (patch)
tree564aa64234227385c118a28f82353ddb8e0a012d /net
parentc39e3a0d0380b12f45bf85a619d3df45e437ee45 (diff)
[MAC80211]: ignore key index on pairwise key (WEP only)
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@physik.hu-berlin.de> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/ieee80211_ioctl.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index e1c4502b26bf..51dca21f77c7 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -73,17 +73,23 @@ static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
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;