[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/include/net/ieee80211.h b/include/net/ieee80211.h
index ed06a94..fa14360 100644
--- a/include/net/ieee80211.h
+++ b/include/net/ieee80211.h
@@ -430,31 +430,34 @@
#include "ieee80211_crypt.h"
-#define SEC_KEY_1 (1<<0)
-#define SEC_KEY_2 (1<<1)
-#define SEC_KEY_3 (1<<2)
-#define SEC_KEY_4 (1<<3)
-#define SEC_KEY_MASK (SEC_KEY_1 | SEC_KEY_2 | SEC_KEY_3 | SEC_KEY_4)
-#define SEC_ACTIVE_KEY (1<<4)
-#define SEC_AUTH_MODE (1<<5)
-#define SEC_UNICAST_GROUP (1<<6)
-#define SEC_LEVEL (1<<7)
-#define SEC_ENABLED (1<<8)
+#define SEC_KEY_1 (1<<0)
+#define SEC_KEY_2 (1<<1)
+#define SEC_KEY_3 (1<<2)
+#define SEC_KEY_4 (1<<3)
+#define SEC_ACTIVE_KEY (1<<4)
+#define SEC_AUTH_MODE (1<<5)
+#define SEC_UNICAST_GROUP (1<<6)
+#define SEC_LEVEL (1<<7)
+#define SEC_ENABLED (1<<8)
+#define SEC_TGI_KEY_RESET (1<<9)
-#define SEC_LEVEL_0 0 /* None */
-#define SEC_LEVEL_1 1 /* WEP 40 and 104 bit */
-#define SEC_LEVEL_2 2 /* Level 1 + TKIP */
-#define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
-#define SEC_LEVEL_3 4 /* Level 2 + CCMP */
+#define SEC_LEVEL_0 0 /* None */
+#define SEC_LEVEL_1 1 /* WEP 40 and 104 bit */
+#define SEC_LEVEL_2 2 /* Level 1 + TKIP */
+#define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
+#define SEC_LEVEL_3 4 /* Level 2 + CCMP */
-#define WEP_KEYS 4
-#define WEP_KEY_LEN 13
+#define WEP_KEYS 4
+#define WEP_KEY_LEN 13
+#define SCM_KEY_LEN 32
+#define SCM_TEMPORAL_KEY_LENGTH 16
struct ieee80211_security {
u16 active_key:2,
- enabled:1, auth_mode:2, auth_algo:4, unicast_uses_group:1;
+ enabled:1,
+ auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
u8 key_sizes[WEP_KEYS];
- u8 keys[WEP_KEYS][WEP_KEY_LEN];
+ u8 keys[WEP_KEYS][SCM_KEY_LEN];
u8 level;
u16 flags;
} __attribute__ ((packed));
@@ -636,6 +639,7 @@
struct ieee80211_device {
struct net_device *dev;
+ struct ieee80211_security sec;
/* Bookkeeping structures */
struct net_device_stats stats;
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);
diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
index fc4e137..f88c811 100644
--- a/net/ieee80211/ieee80211_wx.c
+++ b/net/ieee80211/ieee80211_wx.c
@@ -278,6 +278,7 @@
};
int i, key, key_provided, len;
struct ieee80211_crypt_data **crypt;
+ int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
IEEE80211_DEBUG_WX("SET_ENCODE\n");
@@ -318,6 +319,7 @@
if (i == WEP_KEYS) {
sec.enabled = 0;
+ sec.encrypt = 0;
sec.level = SEC_LEVEL_0;
sec.flags |= SEC_ENABLED | SEC_LEVEL;
}
@@ -326,6 +328,7 @@
}
sec.enabled = 1;
+ sec.encrypt = 1;
sec.flags |= SEC_ENABLED;
if (*crypt != NULL && (*crypt)->ops != NULL &&
@@ -335,7 +338,7 @@
ieee80211_crypt_delayed_deinit(ieee, crypt);
}
- if (*crypt == NULL) {
+ if (*crypt == NULL && host_crypto) {
struct ieee80211_crypt_data *new_crypt;
/* take WEP into use */
@@ -375,31 +378,34 @@
key, escape_essid(sec.keys[key], len),
erq->length, len);
sec.key_sizes[key] = len;
- (*crypt)->ops->set_key(sec.keys[key], len, NULL,
- (*crypt)->priv);
+ if (*crypt)
+ (*crypt)->ops->set_key(sec.keys[key], len, NULL,
+ (*crypt)->priv);
sec.flags |= (1 << key);
/* This ensures a key will be activated if no key is
* explicitely set */
if (key == sec.active_key)
sec.flags |= SEC_ACTIVE_KEY;
- } else {
- len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
- NULL, (*crypt)->priv);
- if (len == 0) {
- /* Set a default key of all 0 */
- IEEE80211_DEBUG_WX("Setting key %d to all zero.\n",
- key);
- memset(sec.keys[key], 0, 13);
- (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
- (*crypt)->priv);
- sec.key_sizes[key] = 13;
- sec.flags |= (1 << key);
- }
+ } else {
+ if (host_crypto) {
+ len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
+ NULL, (*crypt)->priv);
+ if (len == 0) {
+ /* Set a default key of all 0 */
+ IEEE80211_DEBUG_WX("Setting key %d to all "
+ "zero.\n", key);
+ memset(sec.keys[key], 0, 13);
+ (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
+ (*crypt)->priv);
+ sec.key_sizes[key] = 13;
+ sec.flags |= (1 << key);
+ }
+ }
/* No key data - just set the default TX key index */
if (key_provided) {
- IEEE80211_DEBUG_WX
- ("Setting key %d to default Tx key.\n", key);
+ IEEE80211_DEBUG_WX("Setting key %d to default Tx "
+ "key.\n", key);
ieee->tx_keyidx = key;
sec.active_key = key;
sec.flags |= SEC_ACTIVE_KEY;
@@ -442,6 +448,7 @@
struct iw_point *erq = &(wrqu->encoding);
int len, key;
struct ieee80211_crypt_data *crypt;
+ struct ieee80211_security *sec = &ieee->sec;
IEEE80211_DEBUG_WX("GET_ENCODE\n");
@@ -456,13 +463,13 @@
crypt = ieee->crypt[key];
erq->flags = key + 1;
- if (crypt == NULL || crypt->ops == NULL) {
+ if (!sec->enabled) {
erq->length = 0;
erq->flags |= IW_ENCODE_DISABLED;
return 0;
}
- if (strcmp(crypt->ops->name, "WEP") != 0) {
+ if (sec->level != SEC_LEVEL_1) {
/* only WEP is supported with wireless extensions, so just
* report that encryption is used */
erq->length = 0;
@@ -470,9 +477,10 @@
return 0;
}
- len = crypt->ops->get_key(keybuf, WEP_KEY_LEN, NULL, crypt->priv);
- erq->length = (len >= 0 ? len : 0);
+ len = sec->key_sizes[key];
+ memcpy(keybuf, sec->keys[key], len);
+ erq->length = (len >= 0 ? len : 0);
erq->flags |= IW_ENCODE_ENABLED;
if (ieee->open_wep)