From 139c3a0492745192f999aaa67d11cb63983211f5 Mon Sep 17 00:00:00 2001 From: Volker Braun Date: Fri, 14 Sep 2007 11:10:25 -0400 Subject: [PATCH] [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 Signed-off-by: Johannes Berg Acked-by: Michael Wu Signed-off-by: John W. Linville Signed-off-by: David S. Miller --- net/mac80211/ieee80211_ioctl.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c index e1c4502b26b..51dca21f77c 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; -- 2.20.1