static bool
mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
mwifiex_is_skb_mgmt_frame(skb) ||
(GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
(ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
mwifiex_dbg(priv->adapter, DATA,
"bypass txqueue; eth type %#x, mgmt %d\n",
ntohs(eth_hdr->h_proto),
mwifiex_is_skb_mgmt_frame(skb));
return true;
}
return false;
}
static void mwifiex_process_sta_tx_pause(struct mwifiex_private *priv,
struct mwifiex_ie_types_header *tlv)
{
struct mwifiex_tx_pause_tlv *tp;
struct mwifiex_sta_node *sta_ptr;
int status;
unsigned long flags;
tp = (void *)tlv;
mwifiex_dbg(priv->adapter, EVENT,
"sta tx_pause: %pM pause=%d, pkts=%d\n",
tp->peermac, tp->tx_pause,
tp->pkt_cnt);
if (ether_addr_equal(tp->peermac, priv->cfg_bssid)) {
if (tp->tx_pause)
priv->port_open = false;
else
priv->port_open = true;
} else {
if (!ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
return;
status = mwifiex_get_tdls_link_status(priv, tp->peermac);
if (mwifiex_is_tdls_link_setup(status)) {
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
sta_ptr = mwifiex_get_sta_entry(priv, tp->peermac);
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
if (sta_ptr && sta_ptr->tx_pause != tp->tx_pause) {
sta_ptr->tx_pause = tp->tx_pause;
mwifiex_update_ralist_tx_pause(priv,
tp->peermac,
tp->tx_pause);
}
}
}
}
/*
* This function resets the connection state.
*
* The function is invoked after receiving a disconnect event from firmware,
* and performs the following actions -
* - Set media status to disconnected
* - Clean up Tx and Rx packets
* - Resets SNR/NF/RSSI value in driver
* - Resets security configurations in driver
* - Enables auto data rate
* - Saves the previous SSID and BSSID so that they can
* be used for re-association, if required
* - Erases current SSID and BSSID information
* - Sends a disconnect event to upper layers/applications.
*/
void mwifiex_reset_connect_state(struct mwifiex_private *priv, u16 reason_code,
bool from_ap)
{
struct mwifiex_adapter *adapter = priv->adapter;
if (!priv->media_connected)
return;
mwifiex_dbg(adapter, INFO,
"info: handles disconnect event\n");
priv->media_connected = false;
priv->scan_block = false;
priv->port_open = false;
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) {
mwifiex_disable_all_tdls_links(priv);
if (priv->adapter->auto_tdls)
mwifiex_clean_auto_tdls(priv);
}
/* Free Tx and Rx packets, report disconnect to upper layer */
mwifiex_clean_txrx(priv);
/* Reset SNR/NF/RSSI values */
priv->data_rssi_last = 0;
priv->data_nf_last = 0;
priv->data_rssi_avg = 0;
priv->data_nf_avg = 0;
priv->bcn_rssi_last = 0;
priv->bcn_nf_last = 0;
priv->bcn_rssi_avg = 0;
priv->bcn_nf_avg = 0;
priv->rxpd_rate = 0;
priv->rxpd_htinfo = 0;
priv->sec_info.wpa_enabled = false;
priv->sec_info.wpa2_enabled = false;
priv->wpa_ie_len = 0;
priv->sec_info.wapi_enabled = false;
priv->wapi_ie_len = 0;
priv->sec_info.wapi_key_on = false;
priv->sec_info.encryption_mode = 0;
/* Enable auto data rate */
priv->is_data_rate_auto = true;
priv->data_rate = 0;
priv->assoc_resp_ht_param = 0;
priv->ht_param_present = false;
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && priv->hist_data)
mwifiex_hist_data_reset(priv);
if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
priv->adhoc_state = ADHOC_IDLE;
priv->adhoc_is_link_sensed = false;
}
/*
* Memorize the previous SSID and BSSID so
* it could be used for re-assoc
*/
mwifiex_dbg(adapter, INFO,
"info: previous SSID=%s, SSID len=%u\n",
priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
mwifiex_dbg(adapter, INFO,
"info: current SSID=%s, SSID len=%u\n",
priv->curr_bss_params.bss_descriptor.ssid.ssid,
priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
memcpy(&priv->prev_ssid,
&priv->curr_bss_params.bss_descriptor.ssid,
sizeof(struct cfg80211_ssid));
memcpy(priv->prev_bssid,
priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
/* Need to erase the current SSID and BSSID info */
memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
adapter->tx_lock_flag = false;
adapter->pps_uapsd_mode = false;
if (test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags) &&
adapter->curr_cmd)
return;
priv->media_connected = false;
mwifiex_dbg(adapter, MSG,
"info: successfully disconnected from %pM: reason code %d\n",
priv->cfg_bssid, reason_code);
if (priv->bss_mode == NL80211_IFTYPE_STATION ||
priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
!from_ap, GFP_KERNEL);
}
eth_zero_addr(priv->cfg_bssid);
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
if (!ISSUPP_FIRMWARE_SUPPLICANT(priv->adapter->fw_cap_info))
return;
mwifiex_send_cmd(priv, HostCmd_CMD_GTK_REKEY_OFFLOAD_CFG,
HostCmd_ACT_GEN_REMOVE, 0, NULL, false);
}
/*
* CFG802.11 network device handler for data transmission.
*/
static int
mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
struct sk_buff *new_skb;
struct mwifiex_txinfo *tx_info;
bool multicast;
dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
jiffies, priv->bss_type, priv->bss_num);
if (priv->adapter->surprise_removed) {
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
dev_dbg(priv->adapter->dev,
"data: Tx: insufficient skb headroom %d\n",
skb_headroom(skb));
/* Insufficient skb headroom - allocate a new skb */
new_skb =
skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
if (unlikely(!new_skb)) {
dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
kfree_skb(skb);
skb = new_skb;
dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
skb_headroom(skb));
}
tx_info = MWIFIEX_SKB_TXCB(skb);
memset(tx_info, 0, sizeof(*tx_info));
tx_info->bss_num = priv->bss_num;
tx_info->bss_type = priv->bss_type;
tx_info->pkt_len = skb->len;
multicast = is_multicast_ether_addr(skb->data);
if (unlikely(!multicast && skb->sk &&
skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
skb = mwifiex_clone_skb_for_tx_status(priv,
skb,
MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
/* Record the current time the packet was queued; used to
* determine the amount of time the packet was queued in
* the driver before it was sent to the firmware.
* The delay is then sent along with the packet to the
* firmware for aggregate delay calculation for stats and
* MSDU lifetime expiry.
*/
__net_timestamp(skb);
if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
!ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
if (priv->adapter->auto_tdls && priv->check_tdls_tx)
mwifiex_tdls_check_tx(priv, skb);
}
mwifiex_queue_tx_pkt(priv, skb);
return 0;
}
/*
* This function resets the connection state.
*
* The function is invoked after receiving a disconnect event from firmware,
* and performs the following actions -
* - Set media status to disconnected
* - Clean up Tx and Rx packets
* - Resets SNR/NF/RSSI value in driver
* - Resets security configurations in driver
* - Enables auto data rate
* - Saves the previous SSID and BSSID so that they can
* be used for re-association, if required
* - Erases current SSID and BSSID information
* - Sends a disconnect event to upper layers/applications.
*/
void
mwifiex_reset_connect_state(struct mwifiex_private *priv, u16 reason_code)
{
struct mwifiex_adapter *adapter = priv->adapter;
if (!priv->media_connected)
return;
dev_dbg(adapter->dev, "info: handles disconnect event\n");
priv->media_connected = false;
priv->scan_block = false;
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
mwifiex_disable_all_tdls_links(priv);
/* Free Tx and Rx packets, report disconnect to upper layer */
mwifiex_clean_txrx(priv);
/* Reset SNR/NF/RSSI values */
priv->data_rssi_last = 0;
priv->data_nf_last = 0;
priv->data_rssi_avg = 0;
priv->data_nf_avg = 0;
priv->bcn_rssi_last = 0;
priv->bcn_nf_last = 0;
priv->bcn_rssi_avg = 0;
priv->bcn_nf_avg = 0;
priv->rxpd_rate = 0;
priv->rxpd_htinfo = 0;
priv->sec_info.wpa_enabled = false;
priv->sec_info.wpa2_enabled = false;
priv->wpa_ie_len = 0;
priv->sec_info.wapi_enabled = false;
priv->wapi_ie_len = 0;
priv->sec_info.wapi_key_on = false;
priv->sec_info.encryption_mode = 0;
/* Enable auto data rate */
priv->is_data_rate_auto = true;
priv->data_rate = 0;
if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
priv->adhoc_state = ADHOC_IDLE;
priv->adhoc_is_link_sensed = false;
}
/*
* Memorize the previous SSID and BSSID so
* it could be used for re-assoc
*/
dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n",
priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n",
priv->curr_bss_params.bss_descriptor.ssid.ssid,
priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
memcpy(&priv->prev_ssid,
&priv->curr_bss_params.bss_descriptor.ssid,
sizeof(struct cfg80211_ssid));
memcpy(priv->prev_bssid,
priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
/* Need to erase the current SSID and BSSID info */
memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
adapter->tx_lock_flag = false;
adapter->pps_uapsd_mode = false;
if (adapter->is_cmd_timedout && adapter->curr_cmd)
return;
priv->media_connected = false;
dev_dbg(adapter->dev,
"info: successfully disconnected from %pM: reason code %d\n",
priv->cfg_bssid, reason_code);
if (priv->bss_mode == NL80211_IFTYPE_STATION ||
priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
GFP_KERNEL);
}
memset(priv->cfg_bssid, 0, ETH_ALEN);
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
}
/*
* This function processes the received packet and forwards it
* to kernel/upper layer.
*
* This function parses through the received packet and determines
* if it is a debug packet or normal packet.
*
* For non-debug packets, the function chops off unnecessary leading
* header bytes, reconstructs the packet as an ethernet frame or
* 802.2/llc/snap frame as required, and sends it to kernel/upper layer.
*
* The completion callback is called after processing in complete.
*/
int mwifiex_process_rx_packet(struct mwifiex_private *priv,
struct sk_buff *skb)
{
int ret;
struct rx_packet_hdr *rx_pkt_hdr;
struct rxpd *local_rx_pd;
int hdr_chop;
struct ethhdr *eth;
u16 rx_pkt_off, rx_pkt_len;
u8 *offset;
local_rx_pd = (struct rxpd *) (skb->data);
rx_pkt_off = le16_to_cpu(local_rx_pd->rx_pkt_offset);
rx_pkt_len = le16_to_cpu(local_rx_pd->rx_pkt_length);
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;
if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
(!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
sizeof(rfc1042_header)) &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
/*
* Replace the 803 header and rfc1042 header (llc/snap) with an
* EthernetII header, keep the src/dst and snap_type
* (ethertype).
* The firmware only passes up SNAP frames converting
* all RX Data from 802.11 to 802.2/LLC/SNAP frames.
* To create the Ethernet II, just move the src, dst address
* right before the snap_type.
*/
eth = (struct ethhdr *)
((u8 *) &rx_pkt_hdr->eth803_hdr
+ sizeof(rx_pkt_hdr->eth803_hdr) +
sizeof(rx_pkt_hdr->rfc1042_hdr)
- sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
- sizeof(rx_pkt_hdr->eth803_hdr.h_source)
- sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
memcpy(eth->h_source, rx_pkt_hdr->eth803_hdr.h_source,
sizeof(eth->h_source));
memcpy(eth->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
sizeof(eth->h_dest));
/* Chop off the rxpd + the excess memory from the 802.2/llc/snap
header that was removed. */
hdr_chop = (u8 *) eth - (u8 *) local_rx_pd;
} else {
/* Chop off the rxpd */
hdr_chop = (u8 *) &rx_pkt_hdr->eth803_hdr -
(u8 *) local_rx_pd;
}
/* Chop off the leading header bytes so the it points to the start of
either the reconstructed EthII frame or the 802.2/llc/snap frame */
skb_pull(skb, hdr_chop);
if (priv->hs2_enabled &&
mwifiex_discard_gratuitous_arp(priv, skb)) {
dev_dbg(priv->adapter->dev, "Bypassed Gratuitous ARP\n");
dev_kfree_skb_any(skb);
return 0;
}
if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
offset = (u8 *)local_rx_pd + rx_pkt_off;
mwifiex_process_tdls_action_frame(priv, offset, rx_pkt_len);
}
priv->rxpd_rate = local_rx_pd->rx_rate;
priv->rxpd_htinfo = local_rx_pd->ht_info;
ret = mwifiex_recv_packet(priv, skb);
if (ret == -1)
dev_err(priv->adapter->dev, "recv packet failed\n");
return ret;
}
/*
* This function processes the received buffer.
*
* The function looks into the RxPD and performs sanity tests on the
* received buffer to ensure its a valid packet, before processing it
* further. If the packet is determined to be aggregated, it is
* de-aggregated accordingly. Non-unicast packets are sent directly to
* the kernel/upper layers. Unicast packets are handed over to the
* Rx reordering routine if 11n is enabled.
*
* The completion callback is called after processing in complete.
*/
int mwifiex_process_sta_rx_packet(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct mwifiex_adapter *adapter = priv->adapter;
int ret = 0;
struct rxpd *local_rx_pd;
struct rx_packet_hdr *rx_pkt_hdr;
u8 ta[ETH_ALEN];
u16 rx_pkt_type, rx_pkt_offset, rx_pkt_length, seq_num;
struct mwifiex_sta_node *sta_ptr;
local_rx_pd = (struct rxpd *) (skb->data);
rx_pkt_type = le16_to_cpu(local_rx_pd->rx_pkt_type);
rx_pkt_offset = le16_to_cpu(local_rx_pd->rx_pkt_offset);
rx_pkt_length = le16_to_cpu(local_rx_pd->rx_pkt_length);
seq_num = le16_to_cpu(local_rx_pd->seq_num);
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset;
if ((rx_pkt_offset + rx_pkt_length) > (u16) skb->len) {
dev_err(adapter->dev,
"wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n",
skb->len, rx_pkt_offset, rx_pkt_length);
priv->stats.rx_dropped++;
dev_kfree_skb_any(skb);
return ret;
}
if (rx_pkt_type == PKT_TYPE_MGMT) {
ret = mwifiex_process_mgmt_packet(priv, skb);
if (ret)
dev_err(adapter->dev, "Rx of mgmt packet failed");
dev_kfree_skb_any(skb);
return ret;
}
/*
* If the packet is not an unicast packet then send the packet
* directly to os. Don't pass thru rx reordering
*/
if ((!IS_11N_ENABLED(priv) &&
!(ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
!(local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET))) ||
!ether_addr_equal_unaligned(priv->curr_addr, rx_pkt_hdr->eth803_hdr.h_dest)) {
mwifiex_process_rx_packet(priv, skb);
return ret;
}
if (mwifiex_queuing_ra_based(priv) ||
(ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET)) {
memcpy(ta, rx_pkt_hdr->eth803_hdr.h_source, ETH_ALEN);
if (local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET &&
local_rx_pd->priority < MAX_NUM_TID) {
sta_ptr = mwifiex_get_sta_entry(priv, ta);
if (sta_ptr)
sta_ptr->rx_seq[local_rx_pd->priority] =
le16_to_cpu(local_rx_pd->seq_num);
}
} else {
if (rx_pkt_type != PKT_TYPE_BAR)
priv->rx_seq[local_rx_pd->priority] = seq_num;
memcpy(ta, priv->curr_bss_params.bss_descriptor.mac_address,
ETH_ALEN);
}
/* Reorder and send to OS */
ret = mwifiex_11n_rx_reorder_pkt(priv, seq_num, local_rx_pd->priority,
ta, (u8) rx_pkt_type, skb);
if (ret || (rx_pkt_type == PKT_TYPE_BAR))
dev_kfree_skb_any(skb);
if (ret)
priv->stats.rx_dropped++;
return ret;
}
