[PATCH] ieee80211: Hardware crypto and fragmentation offload support
tree 5322d496af90d03ffbec27292dc1a6268a746ede
parent 6c9364386ccb786e4a84427ab3ad712f0b7b8904
author James Ketrenos <jketreno@linux.intel.com> 1124432367 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127311810 -0500
Hardware crypto and fragmentation offload support added (Zhu Yi)
Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index 435ef5a..785e76f 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -231,7 +231,7 @@
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
unsigned long flags;
struct net_device_stats *stats = &ieee->stats;
- int ether_type, encrypt;
+ int ether_type, encrypt, host_encrypt;
int bytes, fc, hdr_len;
struct sk_buff *skb_frag;
struct ieee80211_hdr header = { /* Ensure zero initialized */
@@ -262,7 +262,8 @@
crypt = ieee->crypt[ieee->tx_keyidx];
encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
- ieee->host_encrypt && crypt && crypt->ops;
+ ieee->sec.encrypt;
+ host_encrypt = ieee->host_encrypt && encrypt;
if (!encrypt && ieee->ieee802_1x &&
ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
@@ -280,7 +281,7 @@
/* Determine total amount of storage required for TXB packets */
bytes = skb->len + SNAP_SIZE + sizeof(u16);
- if (encrypt)
+ if (host_encrypt)
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA |
IEEE80211_FCTL_PROTECTED;
else
@@ -320,7 +321,7 @@
bytes_per_frag -= IEEE80211_FCS_LEN;
/* Each fragment may need to have room for encryptiong pre/postfix */
- if (encrypt)
+ if (host_encrypt)
bytes_per_frag -= crypt->ops->extra_prefix_len +
crypt->ops->extra_postfix_len;
@@ -348,7 +349,7 @@
for (i = 0; i < nr_frags; i++) {
skb_frag = txb->fragments[i];
- if (encrypt)
+ if (host_encrypt)
skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
frag_hdr = (struct ieee80211_hdr *)skb_put(skb_frag, hdr_len);
@@ -380,8 +381,22 @@
/* Encryption routine will move the header forward in order
* to insert the IV between the header and the payload */
- if (encrypt)
+ if (host_encrypt)
ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
+
+ /* ipw2200/2915 Hardware encryption doesn't support TKIP MIC */
+ if (!ieee->host_encrypt && encrypt &&
+ (ieee->sec.level == SEC_LEVEL_2) &&
+ crypt && crypt->ops && crypt->ops->encrypt_msdu) {
+ int res = 0;
+ res = crypt->ops->encrypt_msdu(skb_frag, hdr_len,
+ crypt->priv);
+ if (res < 0) {
+ IEEE80211_ERROR("TKIP MIC encryption failed\n");
+ goto failed;
+ }
+ }
+
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);