[PATCH] ieee80211: Added handle_deauth() callback, enhanced tkip/ccmp support of varying hw/sw offload

tree de81b55e78e85997642c651ea677078d0554a14f
parent c8030da8c159f8b82712172a6748a42523aea83a
author James Ketrenos <jketreno@linux.intel.com> 1127104380 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127315225 -0500

Added handle_deauth() callback.
Enhanced crypt_{tkip,ccmp} to support varying splits of HW/SW offload.
Changed channel freq to u32 from u16.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 42 insertions, 18 deletions

diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index 21022f195bab..e0733050ae71 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -260,35 +260,27 @@ static void tkip_mixing_phase2(u8 * WEPSeed, const u8 * TK, const u16 * TTAK,
 #endif
 }
 
-static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
+static u8 *ieee80211_tkip_hdr(struct sk_buff *skb, int hdr_len, void *priv)
 {
         struct ieee80211_tkip_data *tkey = priv;
         int len;
-        u8 rc4key[16], *pos, *icv;
+        u8 *rc4key, *pos, *icv;
         struct ieee80211_hdr_4addr *hdr;
         u32 crc;
-        struct scatterlist sg;
 
         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 
-        if (tkey->ieee->tkip_countermeasures) {
-                if (net_ratelimit()) {
-                        printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
-                               "TX packet to " MAC_FMT "\n",
-                               tkey->ieee->dev->name, MAC_ARG(hdr->addr1));
-                }
-                return -1;
-        }
-
-        if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
-            skb->len < hdr_len)
-                return -1;
+        if (skb_headroom(skb) < 8 || skb->len < hdr_len)
+                return NULL;
 
         if (!tkey->tx_phase1_done) {
                 tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2,
                                    tkey->tx_iv32);
                 tkey->tx_phase1_done = 1;
         }
+        rc4key = kmalloc(16, GFP_ATOMIC);
+        if (!rc4key)
+                return NULL;
         tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak, tkey->tx_iv16);
 
         len = skb->len - hdr_len;
@@ -297,9 +289,9 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
         pos += hdr_len;
         icv = skb_put(skb, 4);
 
-        *pos++ = rc4key[0];
-        *pos++ = rc4key[1];
-        *pos++ = rc4key[2];
+        *pos++ = *rc4key;
+        *pos++ = *(rc4key + 1);
+        *pos++ = *(rc4key + 2);
         *pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */ ;
         *pos++ = tkey->tx_iv32 & 0xff;
         *pos++ = (tkey->tx_iv32 >> 8) & 0xff;
@@ -312,6 +304,38 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
         icv[2] = crc >> 16;
         icv[3] = crc >> 24;
 
+        return rc4key;
+}
+
+static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
+{
+        struct ieee80211_tkip_data *tkey = priv;
+        int len;
+        const u8 *rc4key;
+        u8 *pos;
+        struct scatterlist sg;
+
+        if (tkey->ieee->tkip_countermeasures) {
+                if (net_ratelimit()) {
+                        struct ieee80211_hdr_4addr *hdr =
+                            (struct ieee80211_hdr_4addr *)skb->data;
+                        printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
+                               "TX packet to " MAC_FMT "\n",
+                               tkey->ieee->dev->name, MAC_ARG(hdr->addr1));
+                }
+                return -1;
+        }
+
+        if (skb_tailroom(skb) < 4 || skb->len < hdr_len)
+                return -1;
+
+        len = skb->len - hdr_len;
+        pos = skb->data + hdr_len;
+
+        rc4key = ieee80211_tkip_hdr(skb, hdr_len, priv);
+        if (!rc4key)
+                return -1;
+
         crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
         sg.page = virt_to_page(pos);
         sg.offset = offset_in_page(pos);