[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>
This commit is contained in:
James Ketrenos
Jeff Garzik
parent
20d64713ae
commit
f1bf6638af
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@ -430,31 +430,34 @@ struct ieee80211_device;
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#include "ieee80211_crypt.h"
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#define SEC_KEY_1 (1<<0)
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#define SEC_KEY_2 (1<<1)
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#define SEC_KEY_3 (1<<2)
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#define SEC_KEY_4 (1<<3)
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#define SEC_KEY_MASK (SEC_KEY_1 | SEC_KEY_2 | SEC_KEY_3 | SEC_KEY_4)
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#define SEC_ACTIVE_KEY (1<<4)
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#define SEC_AUTH_MODE (1<<5)
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#define SEC_UNICAST_GROUP (1<<6)
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#define SEC_LEVEL (1<<7)
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#define SEC_ENABLED (1<<8)
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#define SEC_KEY_1 (1<<0)
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#define SEC_KEY_2 (1<<1)
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#define SEC_KEY_3 (1<<2)
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#define SEC_KEY_4 (1<<3)
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#define SEC_ACTIVE_KEY (1<<4)
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#define SEC_AUTH_MODE (1<<5)
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#define SEC_UNICAST_GROUP (1<<6)
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#define SEC_LEVEL (1<<7)
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#define SEC_ENABLED (1<<8)
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#define SEC_TGI_KEY_RESET (1<<9)
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#define SEC_LEVEL_0 0 /* None */
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#define SEC_LEVEL_1 1 /* WEP 40 and 104 bit */
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#define SEC_LEVEL_2 2 /* Level 1 + TKIP */
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#define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
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#define SEC_LEVEL_3 4 /* Level 2 + CCMP */
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#define SEC_LEVEL_0 0 /* None */
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#define SEC_LEVEL_1 1 /* WEP 40 and 104 bit */
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#define SEC_LEVEL_2 2 /* Level 1 + TKIP */
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#define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
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#define SEC_LEVEL_3 4 /* Level 2 + CCMP */
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#define WEP_KEYS 4
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#define WEP_KEY_LEN 13
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#define WEP_KEYS 4
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#define WEP_KEY_LEN 13
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#define SCM_KEY_LEN 32
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#define SCM_TEMPORAL_KEY_LENGTH 16
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struct ieee80211_security {
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u16 active_key:2,
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enabled:1, auth_mode:2, auth_algo:4, unicast_uses_group:1;
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enabled:1,
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auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
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u8 key_sizes[WEP_KEYS];
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u8 keys[WEP_KEYS][WEP_KEY_LEN];
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u8 keys[WEP_KEYS][SCM_KEY_LEN];
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u8 level;
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u16 flags;
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} __attribute__ ((packed));
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@ -636,6 +639,7 @@ enum ieee80211_state {
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struct ieee80211_device {
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struct net_device *dev;
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struct ieee80211_security sec;
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/* Bookkeeping structures */
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struct net_device_stats stats;
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@ -231,7 +231,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
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unsigned long flags;
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struct net_device_stats *stats = &ieee->stats;
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int ether_type, encrypt;
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int ether_type, encrypt, host_encrypt;
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int bytes, fc, hdr_len;
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struct sk_buff *skb_frag;
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struct ieee80211_hdr header = { /* Ensure zero initialized */
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@ -262,7 +262,8 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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crypt = ieee->crypt[ieee->tx_keyidx];
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encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
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ieee->host_encrypt && crypt && crypt->ops;
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ieee->sec.encrypt;
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host_encrypt = ieee->host_encrypt && encrypt;
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if (!encrypt && ieee->ieee802_1x &&
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ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
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@ -280,7 +281,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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/* Determine total amount of storage required for TXB packets */
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bytes = skb->len + SNAP_SIZE + sizeof(u16);
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if (encrypt)
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if (host_encrypt)
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fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA |
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IEEE80211_FCTL_PROTECTED;
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else
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@ -320,7 +321,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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bytes_per_frag -= IEEE80211_FCS_LEN;
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/* Each fragment may need to have room for encryptiong pre/postfix */
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if (encrypt)
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if (host_encrypt)
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bytes_per_frag -= crypt->ops->extra_prefix_len +
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crypt->ops->extra_postfix_len;
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@ -348,7 +349,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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for (i = 0; i < nr_frags; i++) {
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skb_frag = txb->fragments[i];
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if (encrypt)
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if (host_encrypt)
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skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
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frag_hdr = (struct ieee80211_hdr *)skb_put(skb_frag, hdr_len);
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@ -380,8 +381,22 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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/* Encryption routine will move the header forward in order
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* to insert the IV between the header and the payload */
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if (encrypt)
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if (host_encrypt)
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ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
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/* ipw2200/2915 Hardware encryption doesn't support TKIP MIC */
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if (!ieee->host_encrypt && encrypt &&
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(ieee->sec.level == SEC_LEVEL_2) &&
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crypt && crypt->ops && crypt->ops->encrypt_msdu) {
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int res = 0;
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res = crypt->ops->encrypt_msdu(skb_frag, hdr_len,
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crypt->priv);
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if (res < 0) {
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IEEE80211_ERROR("TKIP MIC encryption failed\n");
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goto failed;
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}
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}
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if (ieee->config &
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(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
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skb_put(skb_frag, 4);
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@ -278,6 +278,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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};
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int i, key, key_provided, len;
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struct ieee80211_crypt_data **crypt;
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int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
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IEEE80211_DEBUG_WX("SET_ENCODE\n");
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@ -318,6 +319,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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if (i == WEP_KEYS) {
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sec.enabled = 0;
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sec.encrypt = 0;
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sec.level = SEC_LEVEL_0;
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sec.flags |= SEC_ENABLED | SEC_LEVEL;
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}
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@ -326,6 +328,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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}
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sec.enabled = 1;
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sec.encrypt = 1;
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sec.flags |= SEC_ENABLED;
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if (*crypt != NULL && (*crypt)->ops != NULL &&
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@ -335,7 +338,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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ieee80211_crypt_delayed_deinit(ieee, crypt);
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}
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if (*crypt == NULL) {
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if (*crypt == NULL && host_crypto) {
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struct ieee80211_crypt_data *new_crypt;
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/* take WEP into use */
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@ -375,31 +378,34 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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key, escape_essid(sec.keys[key], len),
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erq->length, len);
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sec.key_sizes[key] = len;
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(*crypt)->ops->set_key(sec.keys[key], len, NULL,
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(*crypt)->priv);
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if (*crypt)
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(*crypt)->ops->set_key(sec.keys[key], len, NULL,
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(*crypt)->priv);
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sec.flags |= (1 << key);
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/* This ensures a key will be activated if no key is
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* explicitely set */
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if (key == sec.active_key)
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sec.flags |= SEC_ACTIVE_KEY;
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} else {
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len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
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NULL, (*crypt)->priv);
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if (len == 0) {
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/* Set a default key of all 0 */
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IEEE80211_DEBUG_WX("Setting key %d to all zero.\n",
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key);
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memset(sec.keys[key], 0, 13);
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(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
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(*crypt)->priv);
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sec.key_sizes[key] = 13;
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sec.flags |= (1 << key);
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}
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} else {
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if (host_crypto) {
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len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
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NULL, (*crypt)->priv);
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if (len == 0) {
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/* Set a default key of all 0 */
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IEEE80211_DEBUG_WX("Setting key %d to all "
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"zero.\n", key);
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memset(sec.keys[key], 0, 13);
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(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
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(*crypt)->priv);
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sec.key_sizes[key] = 13;
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sec.flags |= (1 << key);
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}
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}
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/* No key data - just set the default TX key index */
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if (key_provided) {
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IEEE80211_DEBUG_WX
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("Setting key %d to default Tx key.\n", key);
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IEEE80211_DEBUG_WX("Setting key %d to default Tx "
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"key.\n", key);
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ieee->tx_keyidx = key;
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sec.active_key = key;
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sec.flags |= SEC_ACTIVE_KEY;
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@ -442,6 +448,7 @@ int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
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struct iw_point *erq = &(wrqu->encoding);
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int len, key;
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struct ieee80211_crypt_data *crypt;
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struct ieee80211_security *sec = &ieee->sec;
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IEEE80211_DEBUG_WX("GET_ENCODE\n");
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@ -456,13 +463,13 @@ int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
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crypt = ieee->crypt[key];
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erq->flags = key + 1;
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if (crypt == NULL || crypt->ops == NULL) {
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if (!sec->enabled) {
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erq->length = 0;
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erq->flags |= IW_ENCODE_DISABLED;
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return 0;
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}
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if (strcmp(crypt->ops->name, "WEP") != 0) {
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if (sec->level != SEC_LEVEL_1) {
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/* only WEP is supported with wireless extensions, so just
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* report that encryption is used */
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erq->length = 0;
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@ -470,9 +477,10 @@ int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
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return 0;
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}
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len = crypt->ops->get_key(keybuf, WEP_KEY_LEN, NULL, crypt->priv);
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erq->length = (len >= 0 ? len : 0);
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len = sec->key_sizes[key];
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memcpy(keybuf, sec->keys[key], len);
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erq->length = (len >= 0 ? len : 0);
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erq->flags |= IW_ENCODE_ENABLED;
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if (ieee->open_wep)
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