From: Tsang-Shian Lin <th...@realtek.com>
AP WiFi settings are changed(channel, bandwidth), but deauth may not
received by STA. For these cases, we need to detect and handle beacon
changes.
Signed-off-by: Tsang-Shian Lin <th...@realtek.com>
Signed-off-by: Ping-Ke Shih <pks...@realtek.com>
Signed-off-by: Larry Finger <larry.fin...@lwfinger.net>
Cc: Yan-Hsuan Chuang <yhchu...@realtek.com>
Cc: Birming Chiu <birm...@realtek.com>
Cc: Shaofu <sha...@realtek.com>
Cc: Steven Ting <stevent...@realtek.com>
---
drivers/net/wireless/realtek/rtlwifi/base.c | 179 ++++++++++++++++++++++++++++
drivers/net/wireless/realtek/rtlwifi/base.h | 3 +-
drivers/net/wireless/realtek/rtlwifi/core.c | 48 ++++++++
drivers/net/wireless/realtek/rtlwifi/pci.c | 2 +
drivers/net/wireless/realtek/rtlwifi/wifi.h | 13 ++
5 files changed, 244 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c
b/drivers/net/wireless/realtek/rtlwifi/base.c
index cad2272ae21b..a04afdd55569 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -2360,6 +2360,185 @@ struct sk_buff *rtl_make_del_ba(struct ieee80211_hw *hw,
return skb;
}
+bool rtl_check_beacon_key(struct ieee80211_hw *hw, void *data, unsigned int
len)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
+ struct rtl_phy *rtlphy = &rtlpriv->phy;
+ struct ieee80211_hdr *hdr = data;
+ struct ieee80211_ht_cap *ht_cap_ie;
+ struct ieee80211_ht_operation *ht_oper_ie = NULL;
+ struct rtl_beacon_keys bcn_key = {0};
+ struct rtl_beacon_keys *cur_bcn_key;
+ u8 *ht_cap;
+ u8 ht_cap_len;
+ u8 *ht_oper;
+ u8 ht_oper_len;
+ u8 *ds_param;
+ u8 ds_param_len;
+
+ if (mac->opmode != NL80211_IFTYPE_STATION)
+ return false;
+
+ /* check if this really is a beacon*/
+ if (!ieee80211_is_beacon(hdr->frame_control))
+ return false;
+
+ /* min. beacon length + FCS_LEN */
+ if (len <= 40 + FCS_LEN)
+ return false;
+
+ cur_bcn_key = &mac->cur_beacon_keys;
+
+ if (rtlpriv->mac80211.link_state == MAC80211_NOLINK) {
+ if (cur_bcn_key->valid) {
+ cur_bcn_key->valid = false;
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
+ "Reset cur_beacon_keys.valid to false!\n");
+ }
+ return false;
+ }
+
+ /* and only beacons from the associated BSSID, please */
+ if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
+ return false;
+
+ /***** Parsing DS Param IE ******/
+ ds_param = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_DS_PARAMS);
+
+ if (ds_param && !(ds_param[1] < sizeof(*ds_param)))
+ ds_param_len = ds_param[1];
+ else
+ ds_param = NULL;
+
+ /***** Parsing HT Cap. IE ******/
+ ht_cap = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_CAPABILITY);
+
+ if (ht_cap && !(ht_cap[1] < sizeof(*ht_cap))) {
+ ht_cap_len = ht_cap[1];
+ ht_cap_ie = (struct ieee80211_ht_cap *)&ht_cap[2];
+ } else {
+ ht_cap = NULL;
+ ht_cap_ie = NULL;
+ }
+
+ /***** Parsing HT Info. IE ******/
+ ht_oper = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_OPERATION);
+
+ if (ht_oper && !(ht_oper[1] < sizeof(*ht_oper))) {
+ ht_oper_len = ht_oper[1];
+ ht_oper_ie = (struct ieee80211_ht_operation *)&ht_oper[2];
+ } else {
+ ht_oper = NULL;
+ }
+
+ /* update bcn_key */
+ memset(&bcn_key, 0, sizeof(bcn_key));
+
+ if (ds_param)
+ bcn_key.bcn_channel = ds_param[2];
+ else if (ht_oper && ht_oper_ie)
+ bcn_key.bcn_channel = ht_oper_ie->primary_chan;
+
+ if (ht_cap_ie)
+ bcn_key.ht_cap_info = ht_cap_ie->cap_info;
+
+ if (ht_oper && ht_oper_ie)
+ bcn_key.ht_info_infos_0_sco = ht_oper_ie->ht_param & 0x03;
+
+ bcn_key.valid = true;
+
+ /* update cur_beacon_keys or compare beacon key */
+ if (rtlpriv->mac80211.link_state != MAC80211_LINKED &&
+ rtlpriv->mac80211.link_state != MAC80211_LINKED_SCANNING)
+ return true;
+
+ if (!cur_bcn_key->valid) {
+ /* update cur_beacon_keys */
+ memset(cur_bcn_key, 0, sizeof(bcn_key));
+ memcpy(cur_bcn_key, &bcn_key, sizeof(bcn_key));
+ cur_bcn_key->valid = true;
+
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
+ "Beacon key update!ch=%d, ht_cap_info=0x%x,
sco=0x%x\n",
+ cur_bcn_key->bcn_channel,
+ cur_bcn_key->ht_cap_info,
+ cur_bcn_key->ht_info_infos_0_sco);
+
+ return true;
+ }
+
+ /* compare beacon key */
+ if (!memcmp(cur_bcn_key, &bcn_key, sizeof(bcn_key))) {
+ /* same beacon key */
+ mac->new_beacon_cnt = 0;
+ goto chk_exit;
+ }
+
+ if (cur_bcn_key->bcn_channel == bcn_key.bcn_channel &&
+ cur_bcn_key->ht_cap_info == bcn_key.ht_cap_info) {
+ /* Beacon HT info IE, secondary channel offset check */
+ /* 40M -> 20M */
+ if (cur_bcn_key->ht_info_infos_0_sco >
+ bcn_key.ht_info_infos_0_sco) {
+ /* Not a new beacon */
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "Beacon BW change! sco:0x%x -> 0x%x\n",
+ cur_bcn_key->ht_info_infos_0_sco,
+ bcn_key.ht_info_infos_0_sco);
+
+ cur_bcn_key->ht_info_infos_0_sco =
+ bcn_key.ht_info_infos_0_sco;
+ } else {
+ /* 20M -> 40M */
+ if (rtlphy->max_ht_chan_bw >= HT_CHANNEL_WIDTH_20_40) {
+ /* Not a new beacon */
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "Beacon BW change! sco:0x%x -> 0x%x\n",
+ cur_bcn_key->ht_info_infos_0_sco,
+ bcn_key.ht_info_infos_0_sco);
+
+ cur_bcn_key->ht_info_infos_0_sco =
+ bcn_key.ht_info_infos_0_sco;
+ } else {
+ mac->new_beacon_cnt++;
+ }
+ }
+ } else {
+ mac->new_beacon_cnt++;
+ }
+
+ if (mac->new_beacon_cnt == 1) {
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "Get new beacon.\n");
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "Cur : ch=%d, ht_cap=0x%x, sco=0x%x\n",
+ cur_bcn_key->bcn_channel,
+ cur_bcn_key->ht_cap_info,
+ cur_bcn_key->ht_info_infos_0_sco);
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "New RX : ch=%d, ht_cap=0x%x, sco=0x%x\n",
+ bcn_key.bcn_channel,
+ bcn_key.ht_cap_info,
+ bcn_key.ht_info_infos_0_sco);
+
+ } else if (mac->new_beacon_cnt > 1) {
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "new beacon cnt: %d\n",
+ mac->new_beacon_cnt);
+ }
+
+ if (mac->new_beacon_cnt > 3) {
+ ieee80211_connection_loss(rtlpriv->mac80211.vif);
+ RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
+ "new beacon cnt >3, disconnect !\n");
+ }
+
+chk_exit:
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(rtl_check_beacon_key);
/*********************************************************
*
* IOT functions
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.h
b/drivers/net/wireless/realtek/rtlwifi/base.h
index 26735319b38f..3ad8e8107209 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.h
+++ b/drivers/net/wireless/realtek/rtlwifi/base.h
@@ -176,5 +176,6 @@ u8 rtl_tid_to_ac(u8 tid);
void rtl_easy_concurrent_retrytimer_callback(struct timer_list *t);
extern struct rtl_global_var rtl_global_var;
void rtl_phy_scan_operation_backup(struct ieee80211_hw *hw, u8 operation);
-
+bool rtl_check_beacon_key(struct ieee80211_hw *hw, void *data,
+ unsigned int len);
#endif
diff --git a/drivers/net/wireless/realtek/rtlwifi/core.c
b/drivers/net/wireless/realtek/rtlwifi/core.c
index 3cb88825473e..195f7c41b4aa 100644
--- a/drivers/net/wireless/realtek/rtlwifi/core.c
+++ b/drivers/net/wireless/realtek/rtlwifi/core.c
@@ -909,6 +909,7 @@ static int rtl_op_sta_add(struct ieee80211_hw *hw,
struct ieee80211_sta *sta)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &rtlpriv->phy;
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_sta_info *sta_entry;
@@ -941,6 +942,16 @@ static int rtl_op_sta_add(struct ieee80211_hw *hw,
if (mac->p2p)
sta->supp_rates[0] &= 0xfffffff0;
+ if (sta->ht_cap.ht_supported) {
+ if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+ rtlphy->max_ht_chan_bw = HT_CHANNEL_WIDTH_20_40;
+ else
+ rtlphy->max_ht_chan_bw = HT_CHANNEL_WIDTH_20;
+ }
+
+ if (sta->vht_cap.vht_supported)
+ rtlphy->max_vht_chan_bw = HT_CHANNEL_WIDTH_80;
+
memcpy(sta_entry->mac_addr, sta->addr, ETH_ALEN);
RT_TRACE(rtlpriv, COMP_MAC80211, DBG_DMESG,
"Add sta addr is %pM\n", sta->addr);
@@ -1039,6 +1050,7 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw
*hw,
u32 changed)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &rtlpriv->phy;
struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
@@ -1241,6 +1253,16 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw
*hw,
mac->current_ampdu_factor)
mac->current_ampdu_factor =
sta->ht_cap.ampdu_factor;
+
+ if (sta->ht_cap.ht_supported) {
+ if (sta->ht_cap.cap &
+ IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+ rtlphy->max_ht_chan_bw =
+ HT_CHANNEL_WIDTH_20_40;
+ else
+ rtlphy->max_ht_chan_bw =
+ HT_CHANNEL_WIDTH_20;
+ }
}
rcu_read_unlock();
@@ -1252,6 +1274,32 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw
*hw,
&mac->current_ampdu_density);
}
+ if (changed & BSS_CHANGED_BANDWIDTH) {
+ struct ieee80211_sta *sta = NULL;
+
+ RT_TRACE(rtlpriv, COMP_MAC80211, DBG_TRACE,
+ "BSS_CHANGED_BANDWIDTH\n");
+
+ rcu_read_lock();
+ sta = ieee80211_find_sta(vif, (u8 *)bss_conf->bssid);
+
+ if (sta) {
+ if (sta->ht_cap.ht_supported) {
+ if (sta->ht_cap.cap &
+ IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+ rtlphy->max_ht_chan_bw =
+ HT_CHANNEL_WIDTH_20_40;
+ else
+ rtlphy->max_ht_chan_bw =
+ HT_CHANNEL_WIDTH_20;
+ }
+
+ if (sta->vht_cap.vht_supported)
+ rtlphy->max_vht_chan_bw = HT_CHANNEL_WIDTH_80;
+ }
+ rcu_read_unlock();
+ }
+
if (changed & BSS_CHANGED_BSSID) {
u32 basic_rates;
struct ieee80211_sta *sta = NULL;
diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c
b/drivers/net/wireless/realtek/rtlwifi/pci.c
index 8ae36a263426..0bafcefacad0 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.c
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.c
@@ -877,6 +877,8 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
ieee80211_is_probe_resp(fc))) {
dev_kfree_skb_any(skb);
} else {
+ rtl_check_beacon_key(hw, (void *)skb->data,
+ skb->len);
_rtl_pci_rx_to_mac80211(hw, skb, rx_status);
}
} else {
diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h
b/drivers/net/wireless/realtek/rtlwifi/wifi.h
index e2b14793b705..d3ea6260f01c 100644
--- a/drivers/net/wireless/realtek/rtlwifi/wifi.h
+++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h
@@ -962,6 +962,15 @@ struct rtl_probe_rsp {
struct rtl_info_element info_element[0];
} __packed;
+struct rtl_beacon_keys {
+ /*u8 ssid[32];*/
+ /*u32 ssid_len;*/
+ u8 bcn_channel;
+ __le16 ht_cap_info;
+ u8 ht_info_infos_0_sco; /* bit0 & bit1 in infos[0] is 2nd ch offset */
+ bool valid;
+};
+
/*LED related.*/
/*ledpin Identify how to implement this SW led.*/
struct rtl_led {
@@ -1209,6 +1218,8 @@ struct rtl_phy {
u8 rf_mode;
u8 rf_type;
u8 current_chan_bw;
+ u8 max_ht_chan_bw;
+ u8 max_vht_chan_bw;
u8 set_bwmode_inprogress;
u8 sw_chnl_inprogress;
u8 sw_chnl_stage;
@@ -1380,6 +1391,8 @@ struct rtl_mac {
/*Probe Beacon management */
struct rtl_tid_data tids[MAX_TID_COUNT];
enum rtl_link_state link_state;
+ struct rtl_beacon_keys cur_beacon_keys;
+ u8 new_beacon_cnt;
int n_channels;
int n_bitrates;
--
2.15.1
