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[PATCH] ieee80211: Hardware crypto and fragmentation offload support

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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>
This commit is contained in:
James Ketrenos
2005-09-21 11:53:54 -05:00
committed by Jeff Garzik
parent 20d64713ae
commit f1bf6638af
3 changed files with 74 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
net/ieee80211/ieee80211_tx.c
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@@ -231,7 +231,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
/* 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 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
/* 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);