linux/drivers/net/wireless/mwifiex/uap_event.c
Avinash Patil 0f9e9b8ba7 mwifiex: add del_station handler
This patch adds cfg80211 del_station handler for mwifiex.
If bss is not started or there are no stations in associated
stations list, no action is taken. If argument received is
null/broadcast mac, all stations in associated station list are
deauthenticated.

Patch also deletes related RxReorder stream and TxBA stream tables
for related station.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-05-22 15:08:54 -04:00

311 lines
8.5 KiB
C

/*
* Marvell Wireless LAN device driver: AP event handling
*
* Copyright (C) 2012, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "decl.h"
#include "main.h"
#include "11n.h"
/*
* This function will return the pointer to station entry in station list
* table which matches specified mac address.
* This function should be called after acquiring RA list spinlock.
* NULL is returned if station entry is not found in associated STA list.
*/
struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private *priv, u8 *mac)
{
struct mwifiex_sta_node *node;
if (!mac)
return NULL;
list_for_each_entry(node, &priv->sta_list, list) {
if (!memcmp(node->mac_addr, mac, ETH_ALEN))
return node;
}
return NULL;
}
/*
* This function will add a sta_node entry to associated station list
* table with the given mac address.
* If entry exist already, existing entry is returned.
* If received mac address is NULL, NULL is returned.
*/
static struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private *priv, u8 *mac)
{
struct mwifiex_sta_node *node;
unsigned long flags;
if (!mac)
return NULL;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
node = mwifiex_get_sta_entry(priv, mac);
if (node)
goto done;
node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC);
if (!node)
goto done;
memcpy(node->mac_addr, mac, ETH_ALEN);
list_add_tail(&node->list, &priv->sta_list);
done:
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return node;
}
/*
* This function will search for HT IE in association request IEs
* and set station HT parameters accordingly.
*/
static void
mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
int ies_len, struct mwifiex_sta_node *node)
{
const struct ieee80211_ht_cap *ht_cap;
if (!ies)
return;
ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
if (ht_cap) {
node->is_11n_enabled = 1;
node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
IEEE80211_HT_CAP_MAX_AMSDU ?
MWIFIEX_TX_DATA_BUF_SIZE_8K :
MWIFIEX_TX_DATA_BUF_SIZE_4K;
} else {
node->is_11n_enabled = 0;
}
return;
}
/*
* This function will delete a station entry from station list
*/
static void mwifiex_del_sta_entry(struct mwifiex_private *priv, u8 *mac)
{
struct mwifiex_sta_node *node;
unsigned long flags;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
node = mwifiex_get_sta_entry(priv, mac);
if (node) {
list_del(&node->list);
kfree(node);
}
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return;
}
/*
* This function will delete all stations from associated station list.
*/
static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
{
struct mwifiex_sta_node *node, *tmp;
unsigned long flags;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
list_del(&node->list);
kfree(node);
}
INIT_LIST_HEAD(&priv->sta_list);
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return;
}
/*
* This function handles AP interface specific events generated by firmware.
*
* Event specific routines are called by this function based
* upon the generated event cause.
*
*
* Events supported for AP -
* - EVENT_UAP_STA_ASSOC
* - EVENT_UAP_STA_DEAUTH
* - EVENT_UAP_BSS_ACTIVE
* - EVENT_UAP_BSS_START
* - EVENT_UAP_BSS_IDLE
* - EVENT_UAP_MIC_COUNTERMEASURES:
*/
int mwifiex_process_uap_event(struct mwifiex_private *priv)
{
struct mwifiex_adapter *adapter = priv->adapter;
int len, i;
u32 eventcause = adapter->event_cause;
struct station_info sinfo;
struct mwifiex_assoc_event *event;
struct mwifiex_sta_node *node;
u8 *deauth_mac;
struct host_cmd_ds_11n_batimeout *ba_timeout;
u16 ctrl;
switch (eventcause) {
case EVENT_UAP_STA_ASSOC:
memset(&sinfo, 0, sizeof(sinfo));
event = (struct mwifiex_assoc_event *)
(adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
len = -1;
if (ieee80211_is_assoc_req(event->frame_control))
len = 0;
else if (ieee80211_is_reassoc_req(event->frame_control))
/* There will be ETH_ALEN bytes of
* current_ap_addr before the re-assoc ies.
*/
len = ETH_ALEN;
if (len != -1) {
sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
sinfo.assoc_req_ies = &event->data[len];
len = (u8 *)sinfo.assoc_req_ies -
(u8 *)&event->frame_control;
sinfo.assoc_req_ies_len =
le16_to_cpu(event->len) - (u16)len;
}
}
cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
GFP_KERNEL);
node = mwifiex_add_sta_entry(priv, event->sta_addr);
if (!node) {
dev_warn(adapter->dev,
"could not create station entry!\n");
return -1;
}
if (!priv->ap_11n_enabled)
break;
mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
sinfo.assoc_req_ies_len, node);
for (i = 0; i < MAX_NUM_TID; i++) {
if (node->is_11n_enabled)
node->ampdu_sta[i] =
priv->aggr_prio_tbl[i].ampdu_user;
else
node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
}
memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
break;
case EVENT_UAP_STA_DEAUTH:
deauth_mac = adapter->event_body +
MWIFIEX_UAP_EVENT_EXTRA_HEADER;
cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
if (priv->ap_11n_enabled) {
mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
}
mwifiex_del_sta_entry(priv, deauth_mac);
break;
case EVENT_UAP_BSS_IDLE:
priv->media_connected = false;
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
mwifiex_clean_txrx(priv);
mwifiex_del_all_sta_list(priv);
break;
case EVENT_UAP_BSS_ACTIVE:
priv->media_connected = true;
if (!netif_carrier_ok(priv->netdev))
netif_carrier_on(priv->netdev);
mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
break;
case EVENT_UAP_BSS_START:
dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
ETH_ALEN);
break;
case EVENT_UAP_MIC_COUNTERMEASURES:
/* For future development */
dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
break;
case EVENT_AMSDU_AGGR_CTRL:
ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
if (priv->media_connected) {
adapter->tx_buf_size =
min_t(u16, adapter->curr_tx_buf_size, ctrl);
dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
adapter->tx_buf_size);
}
break;
case EVENT_ADDBA:
dev_dbg(adapter->dev, "event: ADDBA Request\n");
if (priv->media_connected)
mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
HostCmd_ACT_GEN_SET, 0,
adapter->event_body);
break;
case EVENT_DELBA:
dev_dbg(adapter->dev, "event: DELBA Request\n");
if (priv->media_connected)
mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
break;
case EVENT_BA_STREAM_TIEMOUT:
dev_dbg(adapter->dev, "event: BA Stream timeout\n");
if (priv->media_connected) {
ba_timeout = (void *)adapter->event_body;
mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
}
break;
default:
dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
eventcause);
break;
}
return 0;
}
/* This function deletes station entry from associated station list.
* Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
* tables created for this station are deleted.
*/
void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
struct mwifiex_sta_node *node)
{
if (priv->ap_11n_enabled && node->is_11n_enabled) {
mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
}
mwifiex_del_sta_entry(priv, node->mac_addr);
return;
}