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Diffstat (limited to 'net/mac80211/wpa.c')
-rw-r--r--net/mac80211/wpa.c198
1 files changed, 74 insertions, 124 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 45709ada8fee..345e10e9b313 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -24,46 +24,22 @@ static int ieee80211_get_hdr_info(const struct sk_buff *skb, u8 **sa, u8 **da,
{
struct ieee80211_hdr *hdr;
size_t hdrlen;
- u16 fc;
- int a4_included;
- u8 *pos;
+ __le16 fc;
- hdr = (struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- hdrlen = 24;
- if ((fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) ==
- (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
- hdrlen += ETH_ALEN;
- *sa = hdr->addr4;
- *da = hdr->addr3;
- } else if (fc & IEEE80211_FCTL_FROMDS) {
- *sa = hdr->addr3;
- *da = hdr->addr1;
- } else if (fc & IEEE80211_FCTL_TODS) {
- *sa = hdr->addr2;
- *da = hdr->addr3;
- } else {
- *sa = hdr->addr2;
- *da = hdr->addr1;
- }
+ hdr = (struct ieee80211_hdr *)skb->data;
+ fc = hdr->frame_control;
- if (fc & 0x80)
- hdrlen += 2;
+ hdrlen = ieee80211_hdrlen(fc);
+
+ *sa = ieee80211_get_SA(hdr);
+ *da = ieee80211_get_DA(hdr);
*data = skb->data + hdrlen;
*data_len = skb->len - hdrlen;
- a4_included = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
- (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
- if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- fc & IEEE80211_STYPE_QOS_DATA) {
- pos = (u8 *) &hdr->addr4;
- if (a4_included)
- pos += 6;
- *qos_tid = pos[0] & 0x0f;
- *qos_tid |= 0x80; /* qos_included flag */
- } else
+ if (ieee80211_is_data_qos(fc))
+ *qos_tid = (*ieee80211_get_qos_ctl(hdr) & 0x0f) | 0x80;
+ else
*qos_tid = 0;
return skb->len < hdrlen ? -1 : 0;
@@ -79,6 +55,7 @@ ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
struct sk_buff *skb = tx->skb;
int authenticator;
int wpa_test = 0;
+ int tail;
fc = tx->fc;
@@ -98,16 +75,13 @@ ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
return TX_CONTINUE;
}
- if (skb_tailroom(skb) < MICHAEL_MIC_LEN) {
- I802_DEBUG_INC(tx->local->tx_expand_skb_head);
- if (unlikely(pskb_expand_head(skb, TKIP_IV_LEN,
- MICHAEL_MIC_LEN + TKIP_ICV_LEN,
- GFP_ATOMIC))) {
- printk(KERN_DEBUG "%s: failed to allocate more memory "
- "for Michael MIC\n", tx->dev->name);
- return TX_DROP;
- }
- }
+ tail = MICHAEL_MIC_LEN;
+ if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
+ tail += TKIP_ICV_LEN;
+
+ if (WARN_ON(skb_tailroom(skb) < tail ||
+ skb_headroom(skb) < TKIP_IV_LEN))
+ return TX_DROP;
#if 0
authenticator = fc & IEEE80211_FCTL_FROMDS; /* FIX */
@@ -176,59 +150,58 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
/* update IV in key information to be able to detect replays */
- rx->key->u.tkip.iv32_rx[rx->queue] = rx->tkip_iv32;
- rx->key->u.tkip.iv16_rx[rx->queue] = rx->tkip_iv16;
+ rx->key->u.tkip.rx[rx->queue].iv32 = rx->tkip_iv32;
+ rx->key->u.tkip.rx[rx->queue].iv16 = rx->tkip_iv16;
return RX_CONTINUE;
}
-static int tkip_encrypt_skb(struct ieee80211_tx_data *tx,
- struct sk_buff *skb, int test)
+static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_key *key = tx->key;
- int hdrlen, len, tailneed;
- u16 fc;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ unsigned int hdrlen;
+ int len, tail;
u8 *pos;
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
+ info->control.icv_len = TKIP_ICV_LEN;
+ info->control.iv_len = TKIP_IV_LEN;
+
+ if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
+ /* hwaccel - with no need for preallocated room for IV/ICV */
+ info->control.hw_key = &tx->key->conf;
+ return 0;
+ }
+
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
len = skb->len - hdrlen;
if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
- tailneed = 0;
+ tail = 0;
else
- tailneed = TKIP_ICV_LEN;
-
- if ((skb_headroom(skb) < TKIP_IV_LEN ||
- skb_tailroom(skb) < tailneed)) {
- I802_DEBUG_INC(tx->local->tx_expand_skb_head);
- if (unlikely(pskb_expand_head(skb, TKIP_IV_LEN, tailneed,
- GFP_ATOMIC)))
- return -1;
- }
+ tail = TKIP_ICV_LEN;
+
+ if (WARN_ON(skb_tailroom(skb) < tail ||
+ skb_headroom(skb) < TKIP_IV_LEN))
+ return -1;
pos = skb_push(skb, TKIP_IV_LEN);
memmove(pos, pos + TKIP_IV_LEN, hdrlen);
pos += hdrlen;
/* Increase IV for the frame */
- key->u.tkip.iv16++;
- if (key->u.tkip.iv16 == 0)
- key->u.tkip.iv32++;
+ key->u.tkip.tx.iv16++;
+ if (key->u.tkip.tx.iv16 == 0)
+ key->u.tkip.tx.iv32++;
if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
- hdr = (struct ieee80211_hdr *)skb->data;
-
/* hwaccel - with preallocated room for IV */
- ieee80211_tkip_add_iv(pos, key,
- (u8) (key->u.tkip.iv16 >> 8),
- (u8) (((key->u.tkip.iv16 >> 8) | 0x20) &
- 0x7f),
- (u8) key->u.tkip.iv16);
+ ieee80211_tkip_add_iv(pos, key, key->u.tkip.tx.iv16);
- tx->control->key_idx = tx->key->conf.hw_key_idx;
+ info->control.hw_key = &tx->key->conf;
return 0;
}
@@ -246,28 +219,16 @@ ieee80211_tx_result
ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
- int wpa_test = 0, test = 0;
- tx->control->icv_len = TKIP_ICV_LEN;
- tx->control->iv_len = TKIP_IV_LEN;
ieee80211_tx_set_protected(tx);
- if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
- !wpa_test) {
- /* hwaccel - with no need for preallocated room for IV/ICV */
- tx->control->key_idx = tx->key->conf.hw_key_idx;
- return TX_CONTINUE;
- }
-
- if (tkip_encrypt_skb(tx, skb, test) < 0)
+ if (tkip_encrypt_skb(tx, skb) < 0)
return TX_DROP;
if (tx->extra_frag) {
int i;
for (i = 0; i < tx->num_extra_frag; i++) {
- if (tkip_encrypt_skb(tx, tx->extra_frag[i], test)
- < 0)
+ if (tkip_encrypt_skb(tx, tx->extra_frag[i]) < 0)
return TX_DROP;
}
}
@@ -280,14 +241,12 @@ ieee80211_rx_result
ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
- u16 fc;
int hdrlen, res, hwaccel = 0, wpa_test = 0;
struct ieee80211_key *key = rx->key;
struct sk_buff *skb = rx->skb;
DECLARE_MAC_BUF(mac);
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
return RX_CONTINUE;
@@ -429,36 +388,41 @@ static inline int ccmp_hdr2pn(u8 *pn, u8 *hdr)
}
-static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx,
- struct sk_buff *skb, int test)
+static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_key *key = tx->key;
- int hdrlen, len, tailneed;
- u16 fc;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ int hdrlen, len, tail;
u8 *pos, *pn, *b_0, *aad, *scratch;
int i;
+ info->control.icv_len = CCMP_MIC_LEN;
+ info->control.iv_len = CCMP_HDR_LEN;
+
+ if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
+ /* hwaccel - with no need for preallocated room for CCMP "
+ * header or MIC fields */
+ info->control.hw_key = &tx->key->conf;
+ return 0;
+ }
+
scratch = key->u.ccmp.tx_crypto_buf;
b_0 = scratch + 3 * AES_BLOCK_LEN;
aad = scratch + 4 * AES_BLOCK_LEN;
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
len = skb->len - hdrlen;
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
- tailneed = 0;
+ tail = 0;
else
- tailneed = CCMP_MIC_LEN;
-
- if ((skb_headroom(skb) < CCMP_HDR_LEN ||
- skb_tailroom(skb) < tailneed)) {
- I802_DEBUG_INC(tx->local->tx_expand_skb_head);
- if (unlikely(pskb_expand_head(skb, CCMP_HDR_LEN, tailneed,
- GFP_ATOMIC)))
- return -1;
- }
+ tail = CCMP_MIC_LEN;
+
+ if (WARN_ON(skb_tailroom(skb) < tail ||
+ skb_headroom(skb) < CCMP_HDR_LEN))
+ return -1;
pos = skb_push(skb, CCMP_HDR_LEN);
memmove(pos, pos + CCMP_HDR_LEN, hdrlen);
@@ -478,7 +442,7 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx,
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
/* hwaccel - with preallocated room for CCMP header */
- tx->control->key_idx = key->conf.hw_key_idx;
+ info->control.hw_key = &tx->key->conf;
return 0;
}
@@ -495,28 +459,16 @@ ieee80211_tx_result
ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
- int test = 0;
- tx->control->icv_len = CCMP_MIC_LEN;
- tx->control->iv_len = CCMP_HDR_LEN;
ieee80211_tx_set_protected(tx);
- if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
- /* hwaccel - with no need for preallocated room for CCMP "
- * header or MIC fields */
- tx->control->key_idx = tx->key->conf.hw_key_idx;
- return TX_CONTINUE;
- }
-
- if (ccmp_encrypt_skb(tx, skb, test) < 0)
+ if (ccmp_encrypt_skb(tx, skb) < 0)
return TX_DROP;
if (tx->extra_frag) {
int i;
for (i = 0; i < tx->num_extra_frag; i++) {
- if (ccmp_encrypt_skb(tx, tx->extra_frag[i], test)
- < 0)
+ if (ccmp_encrypt_skb(tx, tx->extra_frag[i]) < 0)
return TX_DROP;
}
}
@@ -529,7 +481,6 @@ ieee80211_rx_result
ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
- u16 fc;
int hdrlen;
struct ieee80211_key *key = rx->key;
struct sk_buff *skb = rx->skb;
@@ -537,8 +488,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
int data_len;
DECLARE_MAC_BUF(mac);
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
return RX_CONTINUE;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-06 09:17:31 +0000