mac80211: wep.c replace magic numbers in IV/ICV removal

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 5c2bf0a3d4db..639998775b48 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -228,11 +228,10 @@ int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb,
                 return -1;
 
         hdrlen = ieee80211_hdrlen(hdr->frame_control);
-
-        if (skb->len < 8 + hdrlen)
+        if (skb->len < hdrlen + WEP_IV_LEN + WEP_ICV_LEN)
                 return -1;
 
-        len = skb->len - hdrlen - 8;
+        len = skb->len - hdrlen - WEP_IV_LEN - WEP_ICV_LEN;
 
         keyidx = skb->data[hdrlen + 3] >> 6;
 
@@ -303,7 +302,7 @@ ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx)
         } else if (!(rx->status->flag & RX_FLAG_IV_STRIPPED)) {
                 ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
                 /* remove ICV */
-                skb_trim(rx->skb, rx->skb->len - 4);
+                skb_trim(rx->skb, rx->skb->len - WEP_ICV_LEN);
         }
 
         return RX_CONTINUE;