diff options
Diffstat (limited to 'net/mac80211/wpa.c')
| -rw-r--r-- | net/mac80211/wpa.c | 71 |
1 files changed, 17 insertions, 54 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index 9f6fd20374e..345e10e9b31 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; @@ -186,8 +162,8 @@ 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; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - int hdrlen, len, tail; - u16 fc; + unsigned int hdrlen; + int len, tail; u8 *pos; info->control.icv_len = TKIP_ICV_LEN; @@ -200,8 +176,7 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) return 0; } - fc = le16_to_cpu(hdr->frame_control); - hdrlen = ieee80211_get_hdrlen(fc); + hdrlen = ieee80211_hdrlen(hdr->frame_control); len = skb->len - hdrlen; if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) @@ -223,14 +198,8 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) 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.tx.iv16 >> 8), - (u8) (((key->u.tkip.tx.iv16 >> 8) | 0x20) & - 0x7f), - (u8) key->u.tkip.tx.iv16); + ieee80211_tkip_add_iv(pos, key, key->u.tkip.tx.iv16); info->control.hw_key = &tx->key->conf; return 0; @@ -272,14 +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; @@ -427,7 +394,6 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) struct ieee80211_key *key = tx->key; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int hdrlen, len, tail; - u16 fc; u8 *pos, *pn, *b_0, *aad, *scratch; int i; @@ -446,8 +412,7 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) 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) @@ -516,7 +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; @@ -524,8 +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; |