unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
{
unsigned int hdrlen = 24;
if (ieee80211_is_data(fc)) {
if (ieee80211_has_a4(fc))
hdrlen = 30;
if (ieee80211_is_data_qos(fc)) {
hdrlen += IEEE80211_QOS_CTL_LEN;
if (ieee80211_has_order(fc))
hdrlen += IEEE80211_HT_CTL_LEN;
}
goto out;
}
if (ieee80211_is_ctl(fc)) {
/*
* ACK and CTS are 10 bytes, all others 16. To see how
* to get this condition consider
* subtype mask: 0b0000000011110000 (0x00F0)
* ACK subtype: 0b0000000011010000 (0x00D0)
* CTS subtype: 0b0000000011000000 (0x00C0)
* bits that matter: ^^^ (0x00E0)
* value of those: 0b0000000011000000 (0x00C0)
*/
if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
hdrlen = 10;
else
hdrlen = 16;
}
out:
return hdrlen;
}
static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
unsigned int len)
{
#if NET_IP_ALIGN != 0
unsigned int padding = 0;
#endif
/* make function no-op when possible */
if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
return 0;
#if NET_IP_ALIGN != 0
/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
/* TODO: deduplicate common code, define helper function instead? */
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
padding ^= NET_IP_ALIGN;
/* Input might be invalid, avoid accessing memory outside
* the buffer.
*/
if ((unsigned long)qc - (unsigned long)hdr < len &&
*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
padding ^= NET_IP_ALIGN;
}
if (ieee80211_has_a4(hdr->frame_control))
padding ^= NET_IP_ALIGN;
return padding;
#endif
}
static struct sk_buff *carl9170_rx_copy_data(u8 *buf, int len)
{
struct sk_buff *skb;
int reserved = 0;
struct ieee80211_hdr *hdr = (void *) buf;
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
reserved += NET_IP_ALIGN;
if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
reserved += NET_IP_ALIGN;
}
if (ieee80211_has_a4(hdr->frame_control))
reserved += NET_IP_ALIGN;
reserved = 32 + (reserved & NET_IP_ALIGN);
skb = dev_alloc_skb(len + reserved);
if (likely(skb)) {
skb_reserve(skb, reserved);
memcpy(skb_put(skb, len), buf, len);
}
return skb;
}
int ath9k_cmn_padpos(__le16 frame_control)
{
int padpos = 24;
if (ieee80211_has_a4(frame_control)) {
padpos += ETH_ALEN;
}
if (ieee80211_is_data_qos(frame_control)) {
padpos += IEEE80211_QOS_CTL_LEN;
}
return padpos;
}
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
enum nl80211_iftype type)
{
__le16 fc = hdr->frame_control;
/* drop ACK/CTS frames and incorrect hdr len (ctrl) */
if (len < 16)
return NULL;
if (ieee80211_is_data(fc)) {
if (len < 24) /* drop incorrect hdr len (data) */
return NULL;
if (ieee80211_has_a4(fc))
return NULL;
if (ieee80211_has_tods(fc))
return hdr->addr1;
if (ieee80211_has_fromds(fc))
return hdr->addr2;
return hdr->addr3;
}
if (ieee80211_is_mgmt(fc)) {
if (len < 24) /* drop incorrect hdr len (mgmt) */
return NULL;
return hdr->addr3;
}
if (ieee80211_is_ctl(fc)) {
if(ieee80211_is_pspoll(fc))
return hdr->addr1;
if (ieee80211_is_back_req(fc)) {
switch (type) {
case NL80211_IFTYPE_STATION:
return hdr->addr2;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
return hdr->addr1;
default:
break; /* fall through to the return */
}
}
}
return NULL;
}
static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *scratch,
int encrypted)
{
__le16 mask_fc;
int a4_included;
u8 qos_tid;
u8 *b_0, *aad;
u16 data_len, len_a;
unsigned int hdrlen;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
b_0 = scratch + 3 * AES_BLOCK_LEN;
aad = scratch + 4 * AES_BLOCK_LEN;
/*
* Mask FC: zero subtype b4 b5 b6
* Retry, PwrMgt, MoreData; set Protected
*/
mask_fc = hdr->frame_control;
mask_fc &= ~cpu_to_le16(0x0070 | IEEE80211_FCTL_RETRY |
IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
hdrlen = ieee80211_hdrlen(hdr->frame_control);
len_a = hdrlen - 2;
a4_included = ieee80211_has_a4(hdr->frame_control);
if (ieee80211_is_data_qos(hdr->frame_control))
qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
else
qos_tid = 0;
data_len = skb->len - hdrlen - CCMP_HDR_LEN;
if (encrypted)
data_len -= CCMP_MIC_LEN;
/* First block, b_0 */
b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
/* Nonce: QoS Priority | A2 | PN */
b_0[1] = qos_tid;
memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
memcpy(&b_0[8], pn, CCMP_PN_LEN);
/* l(m) */
put_unaligned_be16(data_len, &b_0[14]);
/* AAD (extra authenticate-only data) / masked 802.11 header
* FC | A1 | A2 | A3 | SC | [A4] | [QC] */
put_unaligned_be16(len_a, &aad[0]);
put_unaligned(mask_fc, (__le16 *)&aad[2]);
memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
/* Mask Seq#, leave Frag# */
aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
aad[23] = 0;
if (a4_included) {
memcpy(&aad[24], hdr->addr4, ETH_ALEN);
aad[30] = qos_tid;
aad[31] = 0;
} else {
memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
aad[24] = qos_tid;
}
}
int vnt_generate_fifo_header(struct vnt_private *priv, u32 dma_idx,
struct vnt_tx_desc *head_td, struct sk_buff *skb)
{
struct vnt_td_info *td_info = head_td->td_info;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
struct ieee80211_rate *rate;
struct ieee80211_key_conf *tx_key;
struct ieee80211_hdr *hdr;
struct vnt_tx_fifo_head *tx_buffer_head =
(struct vnt_tx_fifo_head *)td_info->buf;
u16 tx_body_size = skb->len, current_rate;
u8 pkt_type;
bool is_pspoll = false;
memset(tx_buffer_head, 0, sizeof(*tx_buffer_head));
hdr = (struct ieee80211_hdr *)(skb->data);
rate = ieee80211_get_tx_rate(priv->hw, info);
current_rate = rate->hw_value;
if (priv->wCurrentRate != current_rate &&
!(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
priv->wCurrentRate = current_rate;
RFbSetPower(priv, priv->wCurrentRate,
priv->hw->conf.chandef.chan->hw_value);
}
if (current_rate > RATE_11M) {
if (info->band == NL80211_BAND_5GHZ) {
pkt_type = PK_TYPE_11A;
} else {
if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
pkt_type = PK_TYPE_11GB;
else
pkt_type = PK_TYPE_11GA;
}
} else {
pkt_type = PK_TYPE_11B;
}
/*Set fifo controls */
if (pkt_type == PK_TYPE_11A)
tx_buffer_head->fifo_ctl = 0;
else if (pkt_type == PK_TYPE_11B)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
else if (pkt_type == PK_TYPE_11GB)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
else if (pkt_type == PK_TYPE_11GA)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
/* generate interrupt */
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT);
if (!ieee80211_is_data(hdr->frame_control)) {
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_ISDMA0);
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
} else {
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
if (ieee80211_has_retry(hdr->frame_control))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
priv->byPreambleType = PREAMBLE_SHORT;
else
priv->byPreambleType = PREAMBLE_LONG;
if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
if (ieee80211_has_a4(hdr->frame_control)) {
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
priv->bLongHeader = true;
}
if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
is_pspoll = true;
tx_buffer_head->frag_ctl =
cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
switch (info->control.hw_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
break;
case WLAN_CIPHER_SUITE_CCMP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
default:
break;
}
}
tx_buffer_head->current_rate = cpu_to_le16(current_rate);
/* legacy rates TODO use ieee80211_tx_rate */
if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
if (priv->byAutoFBCtrl == AUTO_FB_0)
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_0);
else if (priv->byAutoFBCtrl == AUTO_FB_1)
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_1);
}
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
s_cbFillTxBufHead(priv, pkt_type, (u8 *)tx_buffer_head,
dma_idx, head_td, is_pspoll);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
if (tx_key->keylen > 0)
vnt_fill_txkey(hdr, tx_buffer_head->tx_key,
tx_key, skb, tx_body_size, td_info->mic_hdr);
}
return 0;
}
static void vnt_fill_txkey(struct ieee80211_hdr *hdr, u8 *key_buffer,
struct ieee80211_key_conf *tx_key,
struct sk_buff *skb, u16 payload_len,
struct vnt_mic_hdr *mic_hdr)
{
u64 pn64;
u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
/* strip header and icv len from payload */
payload_len -= ieee80211_get_hdrlen_from_skb(skb);
payload_len -= tx_key->icv_len;
switch (tx_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
memcpy(key_buffer, iv, 3);
memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
memcpy(key_buffer + 8, iv, 3);
memcpy(key_buffer + 11,
tx_key->key, WLAN_KEY_LEN_WEP40);
}
break;
case WLAN_CIPHER_SUITE_TKIP:
ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
break;
case WLAN_CIPHER_SUITE_CCMP:
if (!mic_hdr)
return;
mic_hdr->id = 0x59;
mic_hdr->payload_len = cpu_to_be16(payload_len);
ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
pn64 = atomic64_read(&tx_key->tx_pn);
mic_hdr->ccmp_pn[5] = pn64;
mic_hdr->ccmp_pn[4] = pn64 >> 8;
mic_hdr->ccmp_pn[3] = pn64 >> 16;
mic_hdr->ccmp_pn[2] = pn64 >> 24;
mic_hdr->ccmp_pn[1] = pn64 >> 32;
mic_hdr->ccmp_pn[0] = pn64 >> 40;
if (ieee80211_has_a4(hdr->frame_control))
mic_hdr->hlen = cpu_to_be16(28);
else
mic_hdr->hlen = cpu_to_be16(22);
ether_addr_copy(mic_hdr->addr1, hdr->addr1);
ether_addr_copy(mic_hdr->addr2, hdr->addr2);
ether_addr_copy(mic_hdr->addr3, hdr->addr3);
mic_hdr->frame_control = cpu_to_le16(
le16_to_cpu(hdr->frame_control) & 0xc78f);
mic_hdr->seq_ctrl = cpu_to_le16(
le16_to_cpu(hdr->seq_ctrl) & 0xf);
if (ieee80211_has_a4(hdr->frame_control))
ether_addr_copy(mic_hdr->addr4, hdr->addr4);
memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
break;
default:
break;
}
}
static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull(skb, RTL_RX_DESC_SIZE);
rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
if (!stats.crc) {
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
/*TODO*/;
} else if (is_multicast_ether_addr(hdr->addr1)) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if (ieee80211_is_data(fc)) {
rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
if (unicast)
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
}
}
static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull(skb, RTL_RX_DESC_SIZE);
rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
if (!stats.crc) {
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
/*TODO*/;
} else if (is_multicast_ether_addr(hdr->addr1)) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if (ieee80211_is_data(fc)) {
rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
if (unicast)
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
if (likely(rtl_action_proc(hw, skb, false)))
ieee80211_rx(hw, skb);
else
dev_kfree_skb_any(skb);
}
}
static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct sk_buff *_skb;
struct sk_buff_head rx_queue;
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
skb_queue_head_init(&rx_queue);
if (rtlusb->usb_rx_segregate_hdl)
rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
WARN_ON(skb_queue_empty(&rx_queue));
while (!skb_queue_empty(&rx_queue)) {
_skb = skb_dequeue(&rx_queue);
_rtl_usb_rx_process_agg(hw, _skb);
ieee80211_rx(hw, _skb);
}
}
#define __RX_SKB_MAX_QUEUED 64
static void _rtl_rx_work(unsigned long param)
{
struct rtl_usb *rtlusb = (struct rtl_usb *)param;
struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
struct sk_buff *skb;
while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
if (unlikely(IS_USB_STOP(rtlusb))) {
dev_kfree_skb_any(skb);
continue;
}
if (likely(!rtlusb->usb_rx_segregate_hdl)) {
_rtl_usb_rx_process_noagg(hw, skb);
} else {
/* TO DO */
_rtl_rx_pre_process(hw, skb);
pr_err("rx agg not supported\n");
}
}
}
static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
unsigned int len)
{
#if NET_IP_ALIGN != 0
unsigned int padding = 0;
#endif
/* make function no-op when possible */
if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
return 0;
#if NET_IP_ALIGN != 0
/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
/* TODO: deduplicate common code, define helper function instead? */
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
padding ^= NET_IP_ALIGN;
/* Input might be invalid, avoid accessing memory outside
* the buffer.
*/
if ((unsigned long)qc - (unsigned long)hdr < len &&
*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
padding ^= NET_IP_ALIGN;
}
if (ieee80211_has_a4(hdr->frame_control))
padding ^= NET_IP_ALIGN;
return padding;
#endif
}
#define __RADIO_TAP_SIZE_RSV 32
static void _rtl_rx_completed(struct urb *_urb)
{
struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
struct rtl_priv *rtlpriv = rtl_priv(hw);
int err = 0;
if (unlikely(IS_USB_STOP(rtlusb)))
goto free;
if (likely(0 == _urb->status)) {
unsigned int padding;
struct sk_buff *skb;
unsigned int qlen;
unsigned int size = _urb->actual_length;
struct ieee80211_hdr *hdr;
if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Too short packet from bulk IN! (len: %d)\n",
size);
goto resubmit;
}
qlen = skb_queue_len(&rtlusb->rx_queue);
if (qlen >= __RX_SKB_MAX_QUEUED) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Pending RX skbuff queue full! (qlen: %d)\n",
qlen);
goto resubmit;
}
hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
if (!skb) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Can't allocate skb for bulk IN!\n");
goto resubmit;
}
_rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
/* Make sure the payload data is 4 byte aligned. */
skb_reserve(skb, padding);
/* reserve some space for mac80211's radiotap */
skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
skb_queue_tail(&rtlusb->rx_queue, skb);
tasklet_schedule(&rtlusb->rx_work_tasklet);
goto resubmit;
}
switch (_urb->status) {
/* disconnect */
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free;
default:
break;
}
resubmit:
usb_anchor_urb(_urb, &rtlusb->rx_submitted);
err = usb_submit_urb(_urb, GFP_ATOMIC);
if (unlikely(err)) {
usb_unanchor_urb(_urb);
goto free;
}
return;
free:
/* On some architectures, usb_free_coherent must not be called from
* hardirq context. Queue urb to cleanup list.
*/
usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
}
#undef __RADIO_TAP_SIZE_RSV
static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
struct urb *urb;
usb_kill_anchored_urbs(&rtlusb->rx_submitted);
tasklet_kill(&rtlusb->rx_work_tasklet);
cancel_work_sync(&rtlpriv->works.lps_change_work);
flush_workqueue(rtlpriv->works.rtl_wq);
destroy_workqueue(rtlpriv->works.rtl_wq);
skb_queue_purge(&rtlusb->rx_queue);
while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
usb_free_urb(urb);
}
}
static int _rtl_usb_receive(struct ieee80211_hw *hw)
{
struct urb *urb;
int err;
int i;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
WARN_ON(0 == rtlusb->rx_urb_num);
/* 1600 == 1514 + max WLAN header + rtk info */
WARN_ON(rtlusb->rx_max_size < 1600);
for (i = 0; i < rtlusb->rx_urb_num; i++) {
err = -ENOMEM;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Failed to alloc URB!!\n");
goto err_out;
}
err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
if (err < 0) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Failed to prep_rx_urb!!\n");
usb_free_urb(urb);
goto err_out;
}
usb_anchor_urb(urb, &rtlusb->rx_submitted);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err)
goto err_out;
usb_free_urb(urb);
}
return 0;
err_out:
usb_kill_anchored_urbs(&rtlusb->rx_submitted);
_rtl_usb_cleanup_rx(hw);
return err;
}
static int rtl_usb_start(struct ieee80211_hw *hw)
{
int err;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
err = rtlpriv->cfg->ops->hw_init(hw);
if (!err) {
rtl_init_rx_config(hw);
/* Enable software */
SET_USB_START(rtlusb);
/* should after adapter start and interrupt enable. */
set_hal_start(rtlhal);
/* Start bulk IN */
err = _rtl_usb_receive(hw);
}
return err;
}
static void ccmp_special_blocks(struct ieee80211_hdr *hdr, size_t hdrlen,
const u64 pn, u8 *b_0, u8 *aad)
{
__le16 mask_fc;
int a4_included, mgmt;
u8 qos_tid;
u16 len_a;
/* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
* Retry, PwrMgt, MoreData; set Protected
*/
mgmt = ieee80211_is_mgmt(hdr->frame_control);
mask_fc = hdr->frame_control;
mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
if (!mgmt)
mask_fc &= ~cpu_to_le16(0x0070);
mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
len_a = hdrlen - 2;
a4_included = ieee80211_has_a4(hdr->frame_control);
if (ieee80211_is_data_qos(hdr->frame_control))
qos_tid = *ieee80211_get_qos_ctl(hdr) &
IEEE80211_QOS_CTL_TID_MASK;
else
qos_tid = 0;
/* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
* mode authentication are not allowed to collide, yet both are derived
* from this vector b_0. We only set L := 1 here to indicate that the
* data size can be represented in (L+1) bytes. The CCM layer will take
* care of storing the data length in the top (L+1) bytes and setting
* and clearing the other bits as is required to derive the two IVs.
*/
b_0[0] = 0x1;
/* Nonce: Nonce Flags | A2 | PN
* Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
*/
b_0[1] = qos_tid | (mgmt << 4);
ether_addr_copy(&b_0[2], hdr->addr2);
b_0[8] = pn >> 40;
b_0[9] = pn >> 32;
b_0[10] = pn >> 24;
b_0[11] = pn >> 16;
b_0[12] = pn >> 8;
b_0[13] = pn;
/* AAD (extra authenticate-only data) / masked 802.11 header
* FC | A1 | A2 | A3 | SC | [A4] | [QC]
*/
put_unaligned_be16(len_a, &aad[0]);
put_unaligned(mask_fc, (__le16 *)&aad[2]);
memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
/* Mask Seq#, leave Frag# */
aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
aad[23] = 0;
if (a4_included) {
ether_addr_copy(&aad[24], hdr->addr4);
aad[30] = qos_tid;
aad[31] = 0;
} else {
memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
aad[24] = qos_tid;
}
}