xref: /linux-5.19.10/drivers/staging/r8188eu/core/rtw_mlme.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

#define _RTW_MLME_C_

#include "../include/osdep_service.h"
#include "../include/drv_types.h"
#include "../include/recv_osdep.h"
#include "../include/xmit_osdep.h"
#include "../include/hal_intf.h"
#include "../include/mlme_osdep.h"
#include "../include/sta_info.h"
#include "../include/wifi.h"
#include "../include/wlan_bssdef.h"
#include "../include/rtw_ioctl_set.h"
#include "../include/usb_osintf.h"
#include "../include/rtl8188e_dm.h"

extern unsigned char	MCS_rate_1R[16];

void rtw_set_roaming(struct adapter *adapter, u8 to_roaming)
{
	if (to_roaming == 0)
		adapter->mlmepriv.to_join = false;
	adapter->mlmepriv.to_roaming = to_roaming;
}

u8 rtw_to_roaming(struct adapter *adapter)
{
	return adapter->mlmepriv.to_roaming;
}

static void rtw_free_mlme_ie_data(u8 **ppie, u32 *plen)
{
	kfree(*ppie);
	*plen = 0;
	*ppie = NULL;
}

void rtw_free_mlme_priv_ie_data(struct mlme_priv *pmlmepriv)
{
	kfree(pmlmepriv->assoc_req);
	rtw_free_mlme_ie_data(&pmlmepriv->wps_beacon_ie, &pmlmepriv->wps_beacon_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->wps_probe_req_ie, &pmlmepriv->wps_probe_req_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->wps_probe_resp_ie, &pmlmepriv->wps_probe_resp_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->wps_assoc_resp_ie, &pmlmepriv->wps_assoc_resp_ie_len);

	rtw_free_mlme_ie_data(&pmlmepriv->p2p_beacon_ie, &pmlmepriv->p2p_beacon_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->p2p_probe_req_ie, &pmlmepriv->p2p_probe_req_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->p2p_probe_resp_ie, &pmlmepriv->p2p_probe_resp_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->p2p_go_probe_resp_ie, &pmlmepriv->p2p_go_probe_resp_ie_len);
	rtw_free_mlme_ie_data(&pmlmepriv->p2p_assoc_req_ie, &pmlmepriv->p2p_assoc_req_ie_len);
}

void _rtw_free_network(struct mlme_priv *pmlmepriv, struct wlan_network *pnetwork, u8 isfreeall)
{
	u32 curr_time, delta_time;
	u32 lifetime = SCANQUEUE_LIFETIME;
	struct __queue *free_queue = &pmlmepriv->free_bss_pool;

	if (!pnetwork)
		return;

	if (pnetwork->fixed)
		return;
	curr_time = jiffies;
	if ((check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) ||
	    (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)))
		lifetime = 1;
	if (!isfreeall) {
		delta_time = (curr_time - pnetwork->last_scanned) / HZ;
		if (delta_time < lifetime)/*  unit:sec */
			return;
	}
	spin_lock_bh(&free_queue->lock);
	list_del_init(&pnetwork->list);
	list_add_tail(&pnetwork->list, &free_queue->queue);
	pmlmepriv->num_of_scanned--;
	spin_unlock_bh(&free_queue->lock);
}

void _rtw_free_network_nolock(struct	mlme_priv *pmlmepriv, struct wlan_network *pnetwork)
{
	struct __queue *free_queue = &pmlmepriv->free_bss_pool;

	if (!pnetwork)
		return;
	if (pnetwork->fixed)
		return;
	list_del_init(&pnetwork->list);
	list_add_tail(&pnetwork->list, get_list_head(free_queue));
	pmlmepriv->num_of_scanned--;
}

/*
	return the wlan_network with the matching addr

	Shall be called under atomic context... to avoid possible racing condition...
*/
struct wlan_network *_rtw_find_network(struct __queue *scanned_queue, u8 *addr)
{
	struct list_head *phead, *plist;
	struct	wlan_network *pnetwork = NULL;
	u8 zero_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};

	if (!memcmp(zero_addr, addr, ETH_ALEN)) {
		pnetwork = NULL;
		goto exit;
	}
	phead = get_list_head(scanned_queue);
	plist = phead->next;

	while (plist != phead) {
		pnetwork = container_of(plist, struct wlan_network, list);
		if (!memcmp(addr, pnetwork->network.MacAddress, ETH_ALEN))
			break;
		plist = plist->next;
	}
	if (plist == phead)
		pnetwork = NULL;
exit:

	return pnetwork;
}

void _rtw_free_network_queue(struct adapter *padapter, u8 isfreeall)
{
	struct list_head *phead, *plist;
	struct wlan_network *pnetwork;
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
	struct __queue *scanned_queue = &pmlmepriv->scanned_queue;

	spin_lock_bh(&scanned_queue->lock);

	phead = get_list_head(scanned_queue);
	plist = phead->next;

	while (phead != plist) {
		pnetwork = container_of(plist, struct wlan_network, list);

		plist = plist->next;

		_rtw_free_network(pmlmepriv, pnetwork, isfreeall);
	}
	spin_unlock_bh(&scanned_queue->lock);

}

int rtw_if_up(struct adapter *padapter)
{
	int res;

	if (padapter->bDriverStopped || padapter->bSurpriseRemoved ||
	    !check_fwstate(&padapter->mlmepriv, _FW_LINKED))
		res = false;
	else
		res =  true;

	return res;
}

void rtw_generate_random_ibss(u8 *pibss)
{
	u32	curtime = jiffies;

	pibss[0] = 0x02;  /* in ad-hoc mode bit1 must set to 1 */
	pibss[1] = 0x11;
	pibss[2] = 0x87;
	pibss[3] = (u8)(curtime & 0xff);/* p[0]; */
	pibss[4] = (u8)((curtime >> 8) & 0xff);/* p[1]; */
	pibss[5] = (u8)((curtime >> 16) & 0xff);/* p[2]; */
}

u8 *rtw_get_capability_from_ie(u8 *ie)
{
	return ie + 8 + 2;
}

u16 rtw_get_capability(struct wlan_bssid_ex *bss)
{
	__le16	val;

	memcpy((u8 *)&val, rtw_get_capability_from_ie(bss->IEs), 2);

	return le16_to_cpu(val);
}

u8 *rtw_get_beacon_interval_from_ie(u8 *ie)
{
	return ie + 8;
}

int rtw_init_mlme_priv(struct adapter *padapter)/* struct	mlme_priv *pmlmepriv) */
{
	int	i;
	u8	*pbuf;
	struct wlan_network	*pnetwork;
	struct mlme_priv		*pmlmepriv = &padapter->mlmepriv;
	int	res = _SUCCESS;

	/*  We don't need to memset padapter->XXX to zero, because adapter is allocated by vzalloc(). */

	pmlmepriv->nic_hdl = (u8 *)padapter;

	pmlmepriv->pscanned = NULL;
	pmlmepriv->fw_state = 0;
	pmlmepriv->cur_network.network.InfrastructureMode = Ndis802_11AutoUnknown;
	pmlmepriv->scan_mode = SCAN_ACTIVE;/*  1: active, 0: pasive. Maybe someday we should rename this varable to "active_mode" (Jeff) */

	spin_lock_init(&pmlmepriv->lock);
	rtw_init_queue(&pmlmepriv->free_bss_pool);
	rtw_init_queue(&pmlmepriv->scanned_queue);

	set_scanned_network_val(pmlmepriv, 0);

	memset(&pmlmepriv->assoc_ssid, 0, sizeof(struct ndis_802_11_ssid));

	pbuf = vzalloc(MAX_BSS_CNT * (sizeof(struct wlan_network)));

	if (!pbuf) {
		res = _FAIL;
		goto exit;
	}
	pmlmepriv->free_bss_buf = pbuf;

	pnetwork = (struct wlan_network *)pbuf;

	for (i = 0; i < MAX_BSS_CNT; i++) {
		INIT_LIST_HEAD(&pnetwork->list);

		list_add_tail(&pnetwork->list, &pmlmepriv->free_bss_pool.queue);

		pnetwork++;
	}

	/* allocate DMA-able/Non-Page memory for cmd_buf and rsp_buf */

	rtw_clear_scan_deny(padapter);

	rtw_init_mlme_timer(padapter);

exit:

	return res;
}

void rtw_free_mlme_priv(struct mlme_priv *pmlmepriv)
{
	rtw_free_mlme_priv_ie_data(pmlmepriv);
	vfree(pmlmepriv->free_bss_buf);
}

struct wlan_network *rtw_alloc_network(struct mlme_priv *pmlmepriv)
{
	struct	wlan_network	*pnetwork;
	struct __queue *free_queue = &pmlmepriv->free_bss_pool;
	struct list_head *plist = NULL;

	spin_lock_bh(&free_queue->lock);

	if (list_empty(&free_queue->queue)) {
		pnetwork = NULL;
		goto exit;
	}
	plist = (&free_queue->queue)->next;

	pnetwork = container_of(plist, struct wlan_network, list);

	list_del_init(&pnetwork->list);

	pnetwork->network_type = 0;
	pnetwork->fixed = false;
	pnetwork->last_scanned = jiffies;
	pnetwork->aid = 0;
	pnetwork->join_res = 0;

	pmlmepriv->num_of_scanned++;

exit:
	spin_unlock_bh(&free_queue->lock);

	return pnetwork;
}

static void rtw_free_network_nolock(struct mlme_priv *pmlmepriv,
				    struct wlan_network *pnetwork)
{

	_rtw_free_network_nolock(pmlmepriv, pnetwork);

}

void rtw_free_network_queue(struct adapter *dev, u8 isfreeall)
{

	_rtw_free_network_queue(dev, isfreeall);

}

/*
	return the wlan_network with the matching addr

	Shall be called under atomic context... to avoid possible racing condition...
*/
struct	wlan_network *rtw_find_network(struct __queue *scanned_queue, u8 *addr)
{
	struct	wlan_network *pnetwork = _rtw_find_network(scanned_queue, addr);

	return pnetwork;
}

int rtw_is_same_ibss(struct adapter *adapter, struct wlan_network *pnetwork)
{
	int ret = true;
	struct security_priv *psecuritypriv = &adapter->securitypriv;

	if ((psecuritypriv->dot11PrivacyAlgrthm != _NO_PRIVACY_) &&
	    (pnetwork->network.Privacy == 0))
		ret = false;
	else if ((psecuritypriv->dot11PrivacyAlgrthm == _NO_PRIVACY_) &&
		 (pnetwork->network.Privacy == 1))
		ret = false;
	else
		ret = true;
	return ret;
}

static int is_same_ess(struct wlan_bssid_ex *a, struct wlan_bssid_ex *b)
{
	return (a->Ssid.SsidLength == b->Ssid.SsidLength) &&
	       !memcmp(a->Ssid.Ssid, b->Ssid.Ssid, a->Ssid.SsidLength);
}

int is_same_network(struct wlan_bssid_ex *src, struct wlan_bssid_ex *dst)
{
	u16 s_cap, d_cap;
	__le16 le_scap, le_dcap;

	memcpy((u8 *)&le_scap, rtw_get_capability_from_ie(src->IEs), 2);
	memcpy((u8 *)&le_dcap, rtw_get_capability_from_ie(dst->IEs), 2);

	s_cap = le16_to_cpu(le_scap);
	d_cap = le16_to_cpu(le_dcap);

	return ((src->Ssid.SsidLength == dst->Ssid.SsidLength) &&
		((!memcmp(src->MacAddress, dst->MacAddress, ETH_ALEN))) &&
		((!memcmp(src->Ssid.Ssid, dst->Ssid.Ssid, src->Ssid.SsidLength))) &&
		((s_cap & WLAN_CAPABILITY_IBSS) ==
		(d_cap & WLAN_CAPABILITY_IBSS)) &&
		((s_cap & WLAN_CAPABILITY_BSS) ==
		(d_cap & WLAN_CAPABILITY_BSS)));
}

struct	wlan_network	*rtw_get_oldest_wlan_network(struct __queue *scanned_queue)
{
	struct list_head *plist, *phead;
	struct	wlan_network	*pwlan = NULL;
	struct	wlan_network	*oldest = NULL;

	phead = get_list_head(scanned_queue);

	plist = phead->next;

	while (1) {
		if (phead == plist)
			break;

		pwlan = container_of(plist, struct wlan_network, list);

		if (!pwlan->fixed) {
			if (!oldest || time_after(oldest->last_scanned, pwlan->last_scanned))
				oldest = pwlan;
		}

		plist = plist->next;
	}

	return oldest;
}

void update_network(struct wlan_bssid_ex *dst, struct wlan_bssid_ex *src,
	struct adapter *padapter, bool update_ie)
{
	long rssi_ori = dst->Rssi;
	u8 sq_smp = src->PhyInfo.SignalQuality;
	u8 ss_final;
	u8 sq_final;
	long rssi_final;

	AntDivCompare8188E(padapter, dst, src); /* this will update src.Rssi, need consider again */

	/* The rule below is 1/5 for sample value, 4/5 for history value */
	if (check_fwstate(&padapter->mlmepriv, _FW_LINKED) && is_same_network(&padapter->mlmepriv.cur_network.network, src)) {
		/* Take the recvpriv's value for the connected AP*/
		ss_final = padapter->recvpriv.signal_strength;
		sq_final = padapter->recvpriv.signal_qual;
		/* the rssi value here is undecorated, and will be used for antenna diversity */
		if (sq_smp != 101) /* from the right channel */
			rssi_final = dst->Rssi; //(src->Rssi+dst->Rssi*4)/5;
		else
			rssi_final = rssi_ori;
	} else {
//		if (sq_smp != 101) { /* from the right channel */
			ss_final = (u32)dst->PhyInfo.SignalStrength; //((u32)(src->PhyInfo.SignalStrength)+(u32)(dst->PhyInfo.SignalStrength)*4)/5;
			sq_final = (u32)dst->PhyInfo.SignalQuality; //((u32)(src->PhyInfo.SignalQuality)+(u32)(dst->PhyInfo.SignalQuality)*4)/5;
			rssi_final = dst->Rssi; //(src->Rssi+dst->Rssi*4)/5;
//		} else {
//			/* bss info not receiving from the right channel, use the original RX signal infos */
//			ss_final = dst->PhyInfo.SignalStrength;
//			sq_final = dst->PhyInfo.SignalQuality;
//			rssi_final = dst->Rssi;
//		}
	}
	if (update_ie) {
		dst->Reserved[0] = src->Reserved[0];
		dst->Reserved[1] = src->Reserved[1];
		memcpy((u8 *)dst, (u8 *)src, get_wlan_bssid_ex_sz(src));
	}
	dst->PhyInfo.SignalStrength = ss_final;
	dst->PhyInfo.SignalQuality = sq_final;
	dst->Rssi = rssi_final;

}

static void update_current_network(struct adapter *adapter, struct wlan_bssid_ex *pnetwork)
{
	struct	mlme_priv	*pmlmepriv = &adapter->mlmepriv;

	if (check_fwstate(pmlmepriv, _FW_LINKED) &&
	    is_same_network(&pmlmepriv->cur_network.network, pnetwork)) {
		update_network(&pmlmepriv->cur_network.network, pnetwork, adapter, true);
		rtw_update_protection(adapter, (pmlmepriv->cur_network.network.IEs) + sizeof(struct ndis_802_11_fixed_ie),
				      pmlmepriv->cur_network.network.IELength);
	}

}

u8 rtw_current_antenna(struct adapter *adapter)
{
	struct hal_data_8188e *haldata = &adapter->haldata;

	return haldata->CurAntenna;
}

/*
Caller must hold pmlmepriv->lock first.
*/
void rtw_update_scanned_network(struct adapter *adapter, struct wlan_bssid_ex *target)
{
	struct list_head *plist, *phead;
	u32	bssid_ex_sz;
	struct mlme_priv	*pmlmepriv = &adapter->mlmepriv;
	struct __queue *queue	= &pmlmepriv->scanned_queue;
	struct wlan_network	*pnetwork = NULL;
	struct wlan_network	*oldest = NULL;

	spin_lock_bh(&queue->lock);
	phead = get_list_head(queue);
	plist = phead->next;

	while (phead != plist) {
		pnetwork	= container_of(plist, struct wlan_network, list);

		if (is_same_network(&pnetwork->network, target))
			break;
		if ((oldest == ((struct wlan_network *)0)) ||
		    time_after(oldest->last_scanned, pnetwork->last_scanned))
			oldest = pnetwork;
		plist = plist->next;
	}
	/* If we didn't find a match, then get a new network slot to initialize
	 * with this beacon's information */
	if (phead == plist) {
		if (list_empty(&pmlmepriv->free_bss_pool.queue)) {
			/* If there are no more slots, expire the oldest */
			pnetwork = oldest;

			target->PhyInfo.Optimum_antenna = rtw_current_antenna(adapter);

			memcpy(&pnetwork->network, target,  get_wlan_bssid_ex_sz(target));
			/*  variable initialize */
			pnetwork->fixed = false;
			pnetwork->last_scanned = jiffies;

			pnetwork->network_type = 0;
			pnetwork->aid = 0;
			pnetwork->join_res = 0;

			/* bss info not receiving from the right channel */
			if (pnetwork->network.PhyInfo.SignalQuality == 101)
				pnetwork->network.PhyInfo.SignalQuality = 0;
		} else {
			/* Otherwise just pull from the free list */

			pnetwork = rtw_alloc_network(pmlmepriv); /*  will update scan_time */

			if (!pnetwork)
				goto exit;

			bssid_ex_sz = get_wlan_bssid_ex_sz(target);
			target->Length = bssid_ex_sz;
			target->PhyInfo.Optimum_antenna = rtw_current_antenna(adapter);
			memcpy(&pnetwork->network, target, bssid_ex_sz);

			pnetwork->last_scanned = jiffies;

			/* bss info not receiving from the right channel */
			if (pnetwork->network.PhyInfo.SignalQuality == 101)
				pnetwork->network.PhyInfo.SignalQuality = 0;
			list_add_tail(&pnetwork->list, &queue->queue);
		}
	} else {
		/* we have an entry and we are going to update it. But this entry may
		 * be already expired. In this case we do the same as we found a new
		 * net and call the new_net handler
		 */
		bool update_ie = true;

		pnetwork->last_scanned = jiffies;

		/* target.Reserved[0]== 1, means that scanned network is a bcn frame. */
		/* probe resp(3) > beacon(1) > probe req(2) */
		if ((target->Reserved[0] != 2) &&
		    (target->Reserved[0] >= pnetwork->network.Reserved[0]))
			update_ie = true;
		else
			update_ie = false;
		update_network(&pnetwork->network, target, adapter, update_ie);
	}

exit:
	spin_unlock_bh(&queue->lock);

}

static void rtw_add_network(struct adapter *adapter,
			    struct wlan_bssid_ex *pnetwork)
{

	rtw_wlan_bssid_ex_remove_p2p_attr(pnetwork, P2P_ATTR_GROUP_INFO);
	update_current_network(adapter, pnetwork);
	rtw_update_scanned_network(adapter, pnetwork);

}

/* select the desired network based on the capability of the (i)bss. */
/*  check items:	(1) security */
/*			(2) network_type */
/*			(3) WMM */
/*			(4) HT */
/*			(5) others */
static bool rtw_is_desired_network(struct adapter *adapter, struct wlan_network *pnetwork)
{
	struct security_priv *psecuritypriv = &adapter->securitypriv;
	struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
	u32 desired_encmode;
	u32 privacy;

	/* u8 wps_ie[512]; */
	uint wps_ielen;

	int bselected = true;

	desired_encmode = psecuritypriv->ndisencryptstatus;
	privacy = pnetwork->network.Privacy;

	if (check_fwstate(pmlmepriv, WIFI_UNDER_WPS)) {
		if (rtw_get_wps_ie(pnetwork->network.IEs + _FIXED_IE_LENGTH_, pnetwork->network.IELength - _FIXED_IE_LENGTH_, NULL, &wps_ielen))
			return true;
		else
			return false;
	}
	if (adapter->registrypriv.wifi_spec == 1) { /* for  correct flow of 8021X  to do.... */
		u8 *p = NULL;
		uint ie_len = 0;

		if ((desired_encmode == Ndis802_11EncryptionDisabled) && (privacy != 0))
			bselected = false;
		if (psecuritypriv->ndisauthtype == Ndis802_11AuthModeWPA2PSK) {
			p = rtw_get_ie(pnetwork->network.IEs + _BEACON_IE_OFFSET_,
				       _RSN_IE_2_, &ie_len,
				       (pnetwork->network.IELength -
				       _BEACON_IE_OFFSET_));
			if (p && ie_len > 0)
				bselected = true;
			else
				bselected = false;
		}
	}

	if ((desired_encmode != Ndis802_11EncryptionDisabled) && (privacy == 0))
		bselected = false;

	if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)) {
		if (pnetwork->network.InfrastructureMode != pmlmepriv->cur_network.network.InfrastructureMode)
			bselected = false;
	}

	return bselected;
}

void rtw_survey_event_callback(struct adapter	*adapter, u8 *pbuf)
{
	u32 len;
	struct wlan_bssid_ex *pnetwork;
	struct	mlme_priv	*pmlmepriv = &adapter->mlmepriv;

	pnetwork = (struct wlan_bssid_ex *)pbuf;

	len = get_wlan_bssid_ex_sz(pnetwork);
	if (len > (sizeof(struct wlan_bssid_ex)))
		return;
	spin_lock_bh(&pmlmepriv->lock);

	/*  update IBSS_network 's timestamp */
	if (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
		if (!memcmp(&pmlmepriv->cur_network.network.MacAddress, pnetwork->MacAddress, ETH_ALEN)) {
			struct wlan_network *ibss_wlan = NULL;

			memcpy(pmlmepriv->cur_network.network.IEs, pnetwork->IEs, 8);
			spin_lock_bh(&pmlmepriv->scanned_queue.lock);
			ibss_wlan = rtw_find_network(&pmlmepriv->scanned_queue,  pnetwork->MacAddress);
			if (ibss_wlan) {
				memcpy(ibss_wlan->network.IEs, pnetwork->IEs, 8);
				spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
				goto exit;
			}
			spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
		}
	}

	/*  lock pmlmepriv->lock when you accessing network_q */
	if (!check_fwstate(pmlmepriv, _FW_UNDER_LINKING)) {
		if (pnetwork->Ssid.Ssid[0] == 0)
			pnetwork->Ssid.SsidLength = 0;
		rtw_add_network(adapter, pnetwork);
	}

exit:

	spin_unlock_bh(&pmlmepriv->lock);
}

void rtw_surveydone_event_callback(struct adapter	*adapter, u8 *pbuf)
{
	struct	mlme_priv *pmlmepriv = &adapter->mlmepriv;

	spin_lock_bh(&pmlmepriv->lock);

	if (pmlmepriv->wps_probe_req_ie) {
		pmlmepriv->wps_probe_req_ie_len = 0;
		kfree(pmlmepriv->wps_probe_req_ie);
		pmlmepriv->wps_probe_req_ie = NULL;
	}

	if (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY))
		_clr_fwstate_(pmlmepriv, _FW_UNDER_SURVEY);

	spin_unlock_bh(&pmlmepriv->lock);

	del_timer_sync(&pmlmepriv->scan_to_timer);

	spin_lock_bh(&pmlmepriv->lock);
	rtw_set_signal_stat_timer(&adapter->recvpriv);

	if (pmlmepriv->to_join) {
		if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)) {
			if (!check_fwstate(pmlmepriv, _FW_LINKED)) {
				set_fwstate(pmlmepriv, _FW_UNDER_LINKING);

				if (rtw_select_and_join_from_scanned_queue(pmlmepriv) == _SUCCESS) {
					_set_timer(&pmlmepriv->assoc_timer, MAX_JOIN_TIMEOUT);
				} else {
					struct wlan_bssid_ex    *pdev_network = &adapter->registrypriv.dev_network;
					u8 *pibss = adapter->registrypriv.dev_network.MacAddress;

					_clr_fwstate_(pmlmepriv, _FW_UNDER_SURVEY);

					memset(&pdev_network->Ssid, 0, sizeof(struct ndis_802_11_ssid));
					memcpy(&pdev_network->Ssid, &pmlmepriv->assoc_ssid, sizeof(struct ndis_802_11_ssid));

					rtw_update_registrypriv_dev_network(adapter);
					rtw_generate_random_ibss(pibss);

					pmlmepriv->fw_state = WIFI_ADHOC_MASTER_STATE;

					rtw_createbss_cmd(adapter);
					pmlmepriv->to_join = false;
				}
			}
		} else {
			int s_ret;
			set_fwstate(pmlmepriv, _FW_UNDER_LINKING);
			pmlmepriv->to_join = false;
			s_ret = rtw_select_and_join_from_scanned_queue(pmlmepriv);
			if (s_ret == _SUCCESS) {
				_set_timer(&pmlmepriv->assoc_timer, MAX_JOIN_TIMEOUT);
			} else {
				if (rtw_to_roaming(adapter) != 0) {
					if (--pmlmepriv->to_roaming == 0 ||
					    rtw_sitesurvey_cmd(adapter, &pmlmepriv->assoc_ssid, 1, NULL, 0) != _SUCCESS) {
						rtw_set_roaming(adapter, 0);
						rtw_free_assoc_resources(adapter, 1);
						rtw_indicate_disconnect(adapter);
					} else {
						pmlmepriv->to_join = true;
					}
				} else {
					rtw_indicate_disconnect(adapter);
				}
				_clr_fwstate_(pmlmepriv, _FW_UNDER_LINKING);
			}
		}
	}

	indicate_wx_scan_complete_event(adapter);

	spin_unlock_bh(&pmlmepriv->lock);

	if (check_fwstate(pmlmepriv, _FW_LINKED))
		p2p_ps_wk_cmd(adapter, P2P_PS_SCAN_DONE, 0);

	rtw_os_xmit_schedule(adapter);
}

static void free_scanqueue(struct	mlme_priv *pmlmepriv)
{
	struct __queue *free_queue = &pmlmepriv->free_bss_pool;
	struct __queue *scan_queue = &pmlmepriv->scanned_queue;
	struct list_head *plist, *phead, *ptemp;

	spin_lock_bh(&scan_queue->lock);
	spin_lock_bh(&free_queue->lock);

	phead = get_list_head(scan_queue);
	plist = phead->next;

	while (plist != phead) {
		ptemp = plist->next;
		list_del_init(plist);
		list_add_tail(plist, &free_queue->queue);
		plist = ptemp;
		pmlmepriv->num_of_scanned--;
	}

	spin_unlock_bh(&free_queue->lock);
	spin_unlock_bh(&scan_queue->lock);
}

/*
*rtw_free_assoc_resources: the caller has to lock pmlmepriv->lock
*/
void rtw_free_assoc_resources(struct adapter *adapter, int lock_scanned_queue)
{
	struct wlan_network *pwlan = NULL;
	struct	mlme_priv *pmlmepriv = &adapter->mlmepriv;
	struct	sta_priv *pstapriv = &adapter->stapriv;
	struct wlan_network *tgt_network = &pmlmepriv->cur_network;

	if (check_fwstate(pmlmepriv, WIFI_STATION_STATE | WIFI_AP_STATE)) {
		struct sta_info *psta;

		psta = rtw_get_stainfo(&adapter->stapriv, tgt_network->network.MacAddress);

		spin_lock_bh(&pstapriv->sta_hash_lock);
		rtw_free_stainfo(adapter,  psta);
		spin_unlock_bh(&pstapriv->sta_hash_lock);
	}

	if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE | WIFI_ADHOC_MASTER_STATE | WIFI_AP_STATE)) {
		struct sta_info *psta;

		rtw_free_all_stainfo(adapter);

		psta = rtw_get_bcmc_stainfo(adapter);
		spin_lock_bh(&pstapriv->sta_hash_lock);
		rtw_free_stainfo(adapter, psta);
		spin_unlock_bh(&pstapriv->sta_hash_lock);

		rtw_init_bcmc_stainfo(adapter);
	}

	if (lock_scanned_queue)
		spin_lock_bh(&pmlmepriv->scanned_queue.lock);

	pwlan = rtw_find_network(&pmlmepriv->scanned_queue, tgt_network->network.MacAddress);
	if (pwlan)
		pwlan->fixed = false;

	if ((check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) && (adapter->stapriv.asoc_sta_count == 1)))
		rtw_free_network_nolock(pmlmepriv, pwlan);

	if (lock_scanned_queue)
		spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
	pmlmepriv->key_mask = 0;

}

/*
*rtw_indicate_connect: the caller has to lock pmlmepriv->lock
*/
void rtw_indicate_connect(struct adapter *padapter)
{
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;

	pmlmepriv->to_join = false;

	if (!check_fwstate(&padapter->mlmepriv, _FW_LINKED)) {
		set_fwstate(pmlmepriv, _FW_LINKED);

		rtw_led_control(padapter, LED_CTL_LINK);

		rtw_os_indicate_connect(padapter);
	}

	pmlmepriv->to_roaming = 0;

	rtw_set_scan_deny(padapter, 3000);
}

/*
*rtw_indicate_disconnect: the caller has to lock pmlmepriv->lock
*/
void rtw_indicate_disconnect(struct adapter *padapter)
{
	struct	mlme_priv *pmlmepriv = &padapter->mlmepriv;

	_clr_fwstate_(pmlmepriv, _FW_UNDER_LINKING | WIFI_UNDER_WPS);

	if (pmlmepriv->to_roaming > 0)
		_clr_fwstate_(pmlmepriv, _FW_LINKED);

	if (check_fwstate(&padapter->mlmepriv, _FW_LINKED) ||
	    (pmlmepriv->to_roaming <= 0)) {
		rtw_os_indicate_disconnect(padapter);

		_clr_fwstate_(pmlmepriv, _FW_LINKED);
		rtw_led_control(padapter, LED_CTL_NO_LINK);
		rtw_clear_scan_deny(padapter);
	}
	p2p_ps_wk_cmd(padapter, P2P_PS_DISABLE, 1);

	rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 1);

}

inline void rtw_indicate_scan_done(struct adapter *padapter, bool aborted)
{
	rtw_os_indicate_scan_done(padapter, aborted);
}

static struct sta_info *rtw_joinbss_update_stainfo(struct adapter *padapter, struct wlan_network *pnetwork)
{
	int i;
	struct sta_info *bmc_sta, *psta = NULL;
	struct recv_reorder_ctrl *preorder_ctrl;
	struct sta_priv *pstapriv = &padapter->stapriv;

	psta = rtw_get_stainfo(pstapriv, pnetwork->network.MacAddress);
	if (!psta)
		psta = rtw_alloc_stainfo(pstapriv, pnetwork->network.MacAddress);

	if (psta) { /* update ptarget_sta */
		psta->aid  = pnetwork->join_res;
		psta->mac_id = 0;
		/* sta mode */
		rtl8188e_SetHalODMVar(padapter, psta, true);
		/* security related */
		if (padapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X) {
			padapter->securitypriv.binstallGrpkey = false;
			padapter->securitypriv.busetkipkey = false;
			padapter->securitypriv.bgrpkey_handshake = false;
			psta->ieee8021x_blocked = true;
			psta->dot118021XPrivacy = padapter->securitypriv.dot11PrivacyAlgrthm;
			memset((u8 *)&psta->dot118021x_UncstKey, 0, sizeof(union Keytype));
			memset((u8 *)&psta->dot11tkiprxmickey, 0, sizeof(union Keytype));
			memset((u8 *)&psta->dot11tkiptxmickey, 0, sizeof(union Keytype));
			memset((u8 *)&psta->dot11txpn, 0, sizeof(union pn48));
			memset((u8 *)&psta->dot11rxpn, 0, sizeof(union pn48));
		}
		/*	When doing the WPS, the wps_ie_len won't equal to 0 */
		/*	And the Wi-Fi driver shouldn't allow the data packet to be transmitted. */
		if (padapter->securitypriv.wps_ie_len != 0) {
			psta->ieee8021x_blocked = true;
			padapter->securitypriv.wps_ie_len = 0;
		}
		/* for A-MPDU Rx reordering buffer control for bmc_sta & sta_info */
		/* if A-MPDU Rx is enabled, resetting  rx_ordering_ctrl wstart_b(indicate_seq) to default value = 0xffff */
		/* todo: check if AP can send A-MPDU packets */
		for (i = 0; i < 16; i++) {
			/* preorder_ctrl = &precvpriv->recvreorder_ctrl[i]; */
			preorder_ctrl = &psta->recvreorder_ctrl[i];
			preorder_ctrl->enable = false;
			preorder_ctrl->indicate_seq = 0xffff;
			preorder_ctrl->wend_b = 0xffff;
			preorder_ctrl->wsize_b = 64;/* max_ampdu_sz; ex. 32(kbytes) -> wsize_b = 32 */
		}
		bmc_sta = rtw_get_bcmc_stainfo(padapter);
		if (bmc_sta) {
			for (i = 0; i < 16; i++) {
				/* preorder_ctrl = &precvpriv->recvreorder_ctrl[i]; */
				preorder_ctrl = &bmc_sta->recvreorder_ctrl[i];
				preorder_ctrl->enable = false;
				preorder_ctrl->indicate_seq = 0xffff;
				preorder_ctrl->wend_b = 0xffff;
				preorder_ctrl->wsize_b = 64;/* max_ampdu_sz; ex. 32(kbytes) -> wsize_b = 32 */
			}
		}
		/* misc. */
		update_sta_info(padapter, psta);
	}
	return psta;
}

/* pnetwork: returns from rtw_joinbss_event_callback */
/* ptarget_wlan: found from scanned_queue */
static void rtw_joinbss_update_network(struct adapter *padapter, struct wlan_network *ptarget_wlan, struct wlan_network  *pnetwork)
{
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
	struct wlan_network  *cur_network = &pmlmepriv->cur_network;

	/*  why not use ptarget_wlan?? */
	memcpy(&cur_network->network, &pnetwork->network, pnetwork->network.Length);
	/*  some IEs in pnetwork is wrong, so we should use ptarget_wlan IEs */
	cur_network->network.IELength = ptarget_wlan->network.IELength;
	memcpy(&cur_network->network.IEs[0], &ptarget_wlan->network.IEs[0], MAX_IE_SZ);

	cur_network->aid = pnetwork->join_res;

	rtw_set_signal_stat_timer(&padapter->recvpriv);
	padapter->recvpriv.signal_strength = ptarget_wlan->network.PhyInfo.SignalStrength;
	padapter->recvpriv.signal_qual = ptarget_wlan->network.PhyInfo.SignalQuality;
	/* the ptarget_wlan->network.Rssi is raw data, we use ptarget_wlan->network.PhyInfo.SignalStrength instead (has scaled) */
	padapter->recvpriv.rssi = translate_percentage_to_dbm(ptarget_wlan->network.PhyInfo.SignalStrength);
	rtw_set_signal_stat_timer(&padapter->recvpriv);

	/* update fw_state will clr _FW_UNDER_LINKING here indirectly */
	switch (pnetwork->network.InfrastructureMode) {
	case Ndis802_11Infrastructure:
		if (pmlmepriv->fw_state & WIFI_UNDER_WPS)
			pmlmepriv->fw_state = WIFI_STATION_STATE | WIFI_UNDER_WPS;
		else
			pmlmepriv->fw_state = WIFI_STATION_STATE;
		break;
	case Ndis802_11IBSS:
		pmlmepriv->fw_state = WIFI_ADHOC_STATE;
		break;
	default:
		pmlmepriv->fw_state = WIFI_NULL_STATE;
		break;
	}

	rtw_update_protection(padapter, (cur_network->network.IEs) +
			      sizeof(struct ndis_802_11_fixed_ie),
			      (cur_network->network.IELength));
	rtw_update_ht_cap(padapter, cur_network->network.IEs, cur_network->network.IELength);
}

/* Notes: the function could be > passive_level (the same context as Rx tasklet) */
/* pnetwork: returns from rtw_joinbss_event_callback */
/* ptarget_wlan: found from scanned_queue */
/* if join_res > 0, for (fw_state == WIFI_STATION_STATE), we check if  "ptarget_sta" & "ptarget_wlan" exist. */
/* if join_res > 0, for (fw_state == WIFI_ADHOC_STATE), we only check if "ptarget_wlan" exist. */
/* if join_res > 0, update "cur_network->network" from "pnetwork->network" if (ptarget_wlan != NULL). */

void rtw_joinbss_event_prehandle(struct adapter *adapter, u8 *pbuf)
{
	struct sta_info *ptarget_sta = NULL, *pcur_sta = NULL;
	struct	sta_priv *pstapriv = &adapter->stapriv;
	struct	mlme_priv	*pmlmepriv = &adapter->mlmepriv;
	struct wlan_network	*pnetwork	= (struct wlan_network *)pbuf;
	struct wlan_network	*cur_network = &pmlmepriv->cur_network;
	struct wlan_network	*pcur_wlan = NULL, *ptarget_wlan = NULL;
	unsigned int		the_same_macaddr = false;

	the_same_macaddr = !memcmp(pnetwork->network.MacAddress, cur_network->network.MacAddress, ETH_ALEN);

	pnetwork->network.Length = get_wlan_bssid_ex_sz(&pnetwork->network);
	if (pnetwork->network.Length > sizeof(struct wlan_bssid_ex))
		return;

	spin_lock_bh(&pmlmepriv->lock);

	if (pnetwork->join_res > 0) {
		spin_lock_bh(&pmlmepriv->scanned_queue.lock);
		if (check_fwstate(pmlmepriv, _FW_UNDER_LINKING)) {
			/* s1. find ptarget_wlan */
			if (check_fwstate(pmlmepriv, _FW_LINKED)) {
				if (the_same_macaddr) {
					ptarget_wlan = rtw_find_network(&pmlmepriv->scanned_queue, cur_network->network.MacAddress);
				} else {
					pcur_wlan = rtw_find_network(&pmlmepriv->scanned_queue, cur_network->network.MacAddress);
					if (pcur_wlan)
						pcur_wlan->fixed = false;

					pcur_sta = rtw_get_stainfo(pstapriv, cur_network->network.MacAddress);
					if (pcur_sta) {
						spin_lock_bh(&pstapriv->sta_hash_lock);
						rtw_free_stainfo(adapter,  pcur_sta);
						spin_unlock_bh(&pstapriv->sta_hash_lock);
					}

					ptarget_wlan = rtw_find_network(&pmlmepriv->scanned_queue, pnetwork->network.MacAddress);
					if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
						if (ptarget_wlan)
							ptarget_wlan->fixed = true;
					}
				}
			} else {
				ptarget_wlan = rtw_find_network(&pmlmepriv->scanned_queue, pnetwork->network.MacAddress);
				if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
					if (ptarget_wlan)
						ptarget_wlan->fixed = true;
				}
			}

			/* s2. update cur_network */
			if (ptarget_wlan) {
				rtw_joinbss_update_network(adapter, ptarget_wlan, pnetwork);
			} else {
				spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
				goto ignore_joinbss_callback;
			}

			/* s3. find ptarget_sta & update ptarget_sta after update cur_network only for station mode */
			if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
				ptarget_sta = rtw_joinbss_update_stainfo(adapter, pnetwork);
				if (!ptarget_sta) {
					spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
					goto ignore_joinbss_callback;
				}
			}

			/* s4. indicate connect */
			if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
				pmlmepriv->cur_network_scanned = ptarget_wlan;
				rtw_indicate_connect(adapter);
			}

			spin_unlock_bh(&pmlmepriv->lock);
			/* s5. Cancel assoc_timer */
			del_timer_sync(&pmlmepriv->assoc_timer);
			spin_lock_bh(&pmlmepriv->lock);
		} else {
			spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
			goto ignore_joinbss_callback;
		}

		spin_unlock_bh(&pmlmepriv->scanned_queue.lock);

	} else if (pnetwork->join_res == -4) {
		rtw_reset_securitypriv(adapter);
		_set_timer(&pmlmepriv->assoc_timer, 1);

		if (check_fwstate(pmlmepriv, _FW_UNDER_LINKING))
			_clr_fwstate_(pmlmepriv, _FW_UNDER_LINKING);
	} else { /* if join_res < 0 (join fails), then try again */
		_set_timer(&pmlmepriv->assoc_timer, 1);
		_clr_fwstate_(pmlmepriv, _FW_UNDER_LINKING);
	}

ignore_joinbss_callback:
	spin_unlock_bh(&pmlmepriv->lock);
}

void rtw_joinbss_event_callback(struct adapter *adapter, u8 *pbuf)
{
	struct wlan_network	*pnetwork	= (struct wlan_network *)pbuf;

	mlmeext_joinbss_event_callback(adapter, pnetwork->join_res);

	rtw_os_xmit_schedule(adapter);

}

void rtw_set_max_rpt_macid(struct adapter *adapter, u8 macid)
{
	rtw_write8(adapter, REG_TX_RPT_CTRL + 1, macid + 1);
}

static u8 search_max_mac_id(struct adapter *padapter)
{
	u8 mac_id;
	u8 aid;
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
	struct sta_priv *pstapriv = &padapter->stapriv;
	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;

	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
		for (aid = (pstapriv->max_num_sta); aid > 0; aid--) {
			if (pstapriv->sta_aid[aid - 1])
				break;
		}
		mac_id = aid + 1;
	} else {
		/* adhoc  id =  31~2 */
		for (mac_id = (NUM_STA - 1); mac_id >= IBSS_START_MAC_ID; mac_id--) {
			if (pmlmeinfo->FW_sta_info[mac_id].status == 1)
				break;
		}
	}
	return mac_id;
}

/* FOR AP , AD-HOC mode */
void rtw_sta_media_status_rpt(struct adapter *adapter, struct sta_info *psta,
			      u32 mstatus)
{
	u16 media_status_rpt;
	u8 macid;

	if (!psta)
		return;

	macid = search_max_mac_id(adapter);
	rtw_set_max_rpt_macid(adapter, macid);

	/* MACID|OPMODE:1 connect */
	media_status_rpt = (u16)((psta->mac_id << 8) | mstatus);
	SetHwReg8188EU(adapter, HW_VAR_H2C_MEDIA_STATUS_RPT, (u8 *)&media_status_rpt);
}

void rtw_stassoc_event_callback(struct adapter *adapter, u8 *pbuf)
{
	struct sta_info *psta;
	struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
	struct stassoc_event	*pstassoc = (struct stassoc_event *)pbuf;
	struct wlan_network	*cur_network = &pmlmepriv->cur_network;
	struct wlan_network	*ptarget_wlan = NULL;

	if (!rtw_access_ctrl(adapter, pstassoc->macaddr))
		return;

	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
		psta = rtw_get_stainfo(&adapter->stapriv, pstassoc->macaddr);
		if (psta)
			rtw_indicate_sta_assoc_event(adapter, psta);
		return;
	}
	/* for AD-HOC mode */
	psta = rtw_get_stainfo(&adapter->stapriv, pstassoc->macaddr);
	if (psta)
		/* the sta have been in sta_info_queue => do nothing */
		return; /* between drv has received this event before and  fw have not yet to set key to CAM_ENTRY) */
	psta = rtw_alloc_stainfo(&adapter->stapriv, pstassoc->macaddr);
	if (!psta)
		return;
	/* to do: init sta_info variable */
	psta->qos_option = 0;
	psta->mac_id = (uint)pstassoc->cam_id;

	/* for ad-hoc mode */
	rtl8188e_SetHalODMVar(adapter, psta, true);
	rtw_sta_media_status_rpt(adapter, psta, 1);
	if (adapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X)
		psta->dot118021XPrivacy = adapter->securitypriv.dot11PrivacyAlgrthm;
	psta->ieee8021x_blocked = false;
	spin_lock_bh(&pmlmepriv->lock);
	if ((check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) ||
	    (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE))) {
		if (adapter->stapriv.asoc_sta_count == 2) {
			spin_lock_bh(&pmlmepriv->scanned_queue.lock);
			ptarget_wlan = rtw_find_network(&pmlmepriv->scanned_queue, cur_network->network.MacAddress);
			pmlmepriv->cur_network_scanned = ptarget_wlan;
			if (ptarget_wlan)
				ptarget_wlan->fixed = true;
			spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
			/*  a sta + bc/mc_stainfo (not Ibss_stainfo) */
			rtw_indicate_connect(adapter);
		}
	}
	spin_unlock_bh(&pmlmepriv->lock);
	mlmeext_sta_add_event_callback(adapter, psta);
}

void rtw_stadel_event_callback(struct adapter *adapter, u8 *pbuf)
{
	int mac_id = -1;
	struct sta_info *psta;
	struct wlan_network *pwlan = NULL;
	struct wlan_bssid_ex *pdev_network = NULL;
	u8 *pibss = NULL;
	struct	mlme_priv *pmlmepriv = &adapter->mlmepriv;
	struct	stadel_event *pstadel = (struct stadel_event *)pbuf;
	struct	sta_priv *pstapriv = &adapter->stapriv;
	struct wlan_network *tgt_network = &pmlmepriv->cur_network;

	psta = rtw_get_stainfo(&adapter->stapriv, pstadel->macaddr);
	if (psta)
		mac_id = psta->mac_id;
	else
		mac_id = pstadel->mac_id;

	if (mac_id >= 0) {
		u16 media_status;
		media_status = (mac_id << 8) | 0; /*   MACID|OPMODE:0 means disconnect */
		/* for STA, AP, ADHOC mode, report disconnect stauts to FW */
		SetHwReg8188EU(adapter, HW_VAR_H2C_MEDIA_STATUS_RPT, (u8 *)&media_status);
	}

	if (check_fwstate(pmlmepriv, WIFI_AP_STATE))
		return;

	mlmeext_sta_del_event_callback(adapter);

	spin_lock_bh(&pmlmepriv->lock);

	if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
		if (adapter->registrypriv.wifi_spec == 1)
			rtw_set_roaming(adapter, 0); /* don't roam */
		else if (rtw_to_roaming(adapter) > 0)
			pmlmepriv->to_roaming--; /* this stadel_event is caused by roaming, decrease to_roaming */
		else if (rtw_to_roaming(adapter) == 0)
			rtw_set_roaming(adapter,
					adapter->registrypriv.max_roaming_times);

		if (*((unsigned short *)(pstadel->rsvd)) != WLAN_REASON_EXPIRATION_CHK)
			rtw_set_roaming(adapter, 0); /* don't roam */

		rtw_free_uc_swdec_pending_queue(adapter);

		rtw_free_assoc_resources(adapter, 1);
		rtw_indicate_disconnect(adapter);
		spin_lock_bh(&pmlmepriv->scanned_queue.lock);
		/*  remove the network entry in scanned_queue */
		pwlan = rtw_find_network(&pmlmepriv->scanned_queue, tgt_network->network.MacAddress);
		if (pwlan) {
			pwlan->fixed = false;
			rtw_free_network_nolock(pmlmepriv, pwlan);
		}
		spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
		_rtw_roaming(adapter, tgt_network);
	}
	if (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) ||
	    check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)) {
		spin_lock_bh(&pstapriv->sta_hash_lock);
		rtw_free_stainfo(adapter,  psta);
		spin_unlock_bh(&pstapriv->sta_hash_lock);

		if (adapter->stapriv.asoc_sta_count == 1) { /* a sta + bc/mc_stainfo (not Ibss_stainfo) */
			spin_lock_bh(&pmlmepriv->scanned_queue.lock);
			/* free old ibss network */
			pwlan = rtw_find_network(&pmlmepriv->scanned_queue, tgt_network->network.MacAddress);
			if (pwlan) {
				pwlan->fixed = false;
				rtw_free_network_nolock(pmlmepriv, pwlan);
			}
			spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
			/* re-create ibss */
			pdev_network = &adapter->registrypriv.dev_network;
			pibss = adapter->registrypriv.dev_network.MacAddress;

			memcpy(pdev_network, &tgt_network->network, get_wlan_bssid_ex_sz(&tgt_network->network));

			memset(&pdev_network->Ssid, 0, sizeof(struct ndis_802_11_ssid));
			memcpy(&pdev_network->Ssid, &pmlmepriv->assoc_ssid, sizeof(struct ndis_802_11_ssid));

			rtw_update_registrypriv_dev_network(adapter);

			rtw_generate_random_ibss(pibss);

			if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)) {
				set_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE);
				_clr_fwstate_(pmlmepriv, WIFI_ADHOC_STATE);
			}

			rtw_createbss_cmd(adapter);
		}
	}
	spin_unlock_bh(&pmlmepriv->lock);

}

/*
* _rtw_join_timeout_handler - Timeout/failure handler for CMD JoinBss
* @adapter: pointer to struct adapter structure
*/
void _rtw_join_timeout_handler (struct adapter *adapter)
{
	struct	mlme_priv *pmlmepriv = &adapter->mlmepriv;
	int do_join_r;

	if (adapter->bDriverStopped || adapter->bSurpriseRemoved)
		return;

	spin_lock_irq(&pmlmepriv->lock);

	if (rtw_to_roaming(adapter) > 0) { /* join timeout caused by roaming */
		while (1) {
			pmlmepriv->to_roaming--;
			if (rtw_to_roaming(adapter) != 0) { /* try another */
				do_join_r = rtw_do_join(adapter);
				if (do_join_r != _SUCCESS)
					continue;
				break;
			} else {
				rtw_indicate_disconnect(adapter);
				break;
			}
		}
	} else {
		rtw_indicate_disconnect(adapter);
		free_scanqueue(pmlmepriv);/*  */
	}
	spin_unlock_irq(&pmlmepriv->lock);

}

/*
* rtw_scan_timeout_handler - Timeout/Failure handler for CMD SiteSurvey
* @adapter: pointer to struct adapter structure
*/
void rtw_scan_timeout_handler (struct adapter *adapter)
{
	struct	mlme_priv *pmlmepriv = &adapter->mlmepriv;

	spin_lock_bh(&pmlmepriv->lock);
	_clr_fwstate_(pmlmepriv, _FW_UNDER_SURVEY);
	spin_unlock_bh(&pmlmepriv->lock);
	rtw_indicate_scan_done(adapter, true);
}

static void rtw_auto_scan_handler(struct adapter *padapter)
{
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;

	/* auto site survey per 60sec */
	if (pmlmepriv->scan_interval > 0) {
		pmlmepriv->scan_interval--;
		if (pmlmepriv->scan_interval == 0) {
			rtw_set_802_11_bssid_list_scan(padapter, NULL, 0);
			pmlmepriv->scan_interval = SCAN_INTERVAL;/*  30*2 sec = 60sec */
		}
	}
}

void rtw_dynamic_check_timer_handlder(struct adapter *adapter)
{
	struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
	struct registry_priv *pregistrypriv = &adapter->registrypriv;

	if (!adapter)
		return;
	if (!adapter->hw_init_completed)
		return;
	if ((adapter->bDriverStopped) || (adapter->bSurpriseRemoved))
		return;
	if (adapter->net_closed)
		return;
	rtw_dynamic_chk_wk_cmd(adapter);

	if (pregistrypriv->wifi_spec == 1) {
		struct wifidirect_info *pwdinfo = &adapter->wdinfo;
		if (rtw_p2p_chk_state(pwdinfo, P2P_STATE_NONE)) {
			/* auto site survey */
			rtw_auto_scan_handler(adapter);
		}
	}

	rcu_read_lock();

	if (rcu_dereference(adapter->pnetdev->rx_handler_data) &&
	    check_fwstate(pmlmepriv, WIFI_STATION_STATE | WIFI_ADHOC_STATE)) {
		/*  expire NAT2.5 entry */
		nat25_db_expire(adapter);

		if (adapter->pppoe_connection_in_progress > 0)
			adapter->pppoe_connection_in_progress--;

		/*  due to rtw_dynamic_check_timer_handlder() is called every 2 seconds */
		if (adapter->pppoe_connection_in_progress > 0)
			adapter->pppoe_connection_in_progress--;
	}

	rcu_read_unlock();
}

#define RTW_SCAN_RESULT_EXPIRE 2000

/*
* Select a new join candidate from the original @param candidate and @param competitor
* @return true: candidate is updated
* @return false: candidate is not updated
*/
static int rtw_check_join_candidate(struct mlme_priv *pmlmepriv
	, struct wlan_network **candidate, struct wlan_network *competitor)
{
	int updated = false;
	struct adapter *adapter = container_of(pmlmepriv, struct adapter, mlmepriv);
	unsigned long scan_res_expire;

	/* check bssid, if needed */
	if (pmlmepriv->assoc_by_bssid) {
		if (memcmp(competitor->network.MacAddress, pmlmepriv->assoc_bssid, ETH_ALEN))
			goto exit;
	}

	/* check ssid, if needed */
	if (pmlmepriv->assoc_ssid.SsidLength) {
		if (competitor->network.Ssid.SsidLength != pmlmepriv->assoc_ssid.SsidLength ||
		    memcmp(competitor->network.Ssid.Ssid, pmlmepriv->assoc_ssid.Ssid, pmlmepriv->assoc_ssid.SsidLength))
			goto exit;
	}

	if (!rtw_is_desired_network(adapter, competitor))
		goto exit;

	scan_res_expire = competitor->last_scanned + msecs_to_jiffies(RTW_SCAN_RESULT_EXPIRE);
	if (rtw_to_roaming(adapter) > 0) {
		if (time_after(jiffies, scan_res_expire) ||
		    !is_same_ess(&competitor->network, &pmlmepriv->cur_network.network))
			goto exit;
	}

	if (!*candidate || (*candidate)->network.Rssi < competitor->network.Rssi) {
		*candidate = competitor;
		updated = true;
	}

exit:
	return updated;
}

/*
Calling context:
The caller of the sub-routine will be in critical section...
The caller must hold the following spinlock
pmlmepriv->lock
*/

int rtw_select_and_join_from_scanned_queue(struct mlme_priv *pmlmepriv)
{
	int ret;
	struct list_head *phead;
	struct adapter *adapter;
	struct __queue *queue	= &pmlmepriv->scanned_queue;
	struct	wlan_network	*pnetwork = NULL;
	struct	wlan_network	*candidate = NULL;

	spin_lock_bh(&pmlmepriv->scanned_queue.lock);
	phead = get_list_head(queue);
	adapter = (struct adapter *)pmlmepriv->nic_hdl;
	pmlmepriv->pscanned = phead->next;
	while (phead != pmlmepriv->pscanned) {
		pnetwork = container_of(pmlmepriv->pscanned, struct wlan_network, list);
		if (!pnetwork) {
			ret = _FAIL;
			goto exit;
		}
		pmlmepriv->pscanned = pmlmepriv->pscanned->next;
		rtw_check_join_candidate(pmlmepriv, &candidate, pnetwork);
	}
	if (!candidate) {
		ret = _FAIL;
		goto exit;
	}

	/*  check for situation of  _FW_LINKED */
	if (check_fwstate(pmlmepriv, _FW_LINKED)) {
		rtw_disassoc_cmd(adapter, 0, true);
		rtw_indicate_disconnect(adapter);
		rtw_free_assoc_resources(adapter, 0);
	}

	ret = rtw_joinbss_cmd(adapter, candidate);

exit:
	spin_unlock_bh(&pmlmepriv->scanned_queue.lock);

	return ret;
}

int rtw_set_auth(struct adapter *adapter, struct security_priv *psecuritypriv)
{
	struct	cmd_obj *pcmd;
	struct	setauth_parm *psetauthparm;
	struct	cmd_priv *pcmdpriv = &adapter->cmdpriv;
	int		res = _SUCCESS;

	pcmd = kzalloc(sizeof(*pcmd), GFP_KERNEL);
	if (!pcmd) {
		res = _FAIL;  /* try again */
		goto exit;
	}

	psetauthparm = kzalloc(sizeof(*psetauthparm), GFP_KERNEL);
	if (!psetauthparm) {
		kfree(pcmd);
		res = _FAIL;
		goto exit;
	}
	psetauthparm->mode = (unsigned char)psecuritypriv->dot11AuthAlgrthm;
	pcmd->cmdcode = _SetAuth_CMD_;
	pcmd->parmbuf = (unsigned char *)psetauthparm;
	pcmd->cmdsz =  (sizeof(struct setauth_parm));
	pcmd->rsp = NULL;
	pcmd->rspsz = 0;
	INIT_LIST_HEAD(&pcmd->list);
	res = rtw_enqueue_cmd(pcmdpriv, pcmd);
exit:

	return res;
}

int rtw_set_key(struct adapter *adapter, struct security_priv *psecuritypriv, int keyid, u8 set_tx)
{
	u8	keylen;
	struct cmd_obj		*pcmd;
	struct setkey_parm	*psetkeyparm;
	struct cmd_priv		*pcmdpriv = &adapter->cmdpriv;
	struct mlme_priv		*pmlmepriv = &adapter->mlmepriv;
	int	res = _SUCCESS;

	pcmd = kzalloc(sizeof(*pcmd), GFP_KERNEL);
	if (!pcmd) {
		res = _FAIL;  /* try again */
		goto exit;
	}
	psetkeyparm = kzalloc(sizeof(*psetkeyparm), GFP_KERNEL);
	if (!psetkeyparm) {
		kfree(pcmd);
		res = _FAIL;
		goto exit;
	}

	if (psecuritypriv->dot11AuthAlgrthm == dot11AuthAlgrthm_8021X)
		psetkeyparm->algorithm = (unsigned char)psecuritypriv->dot118021XGrpPrivacy;
	else
		psetkeyparm->algorithm = (u8)psecuritypriv->dot11PrivacyAlgrthm;
	psetkeyparm->keyid = (u8)keyid;/* 0~3 */
	psetkeyparm->set_tx = set_tx;
	pmlmepriv->key_mask |= BIT(psetkeyparm->keyid);

	switch (psetkeyparm->algorithm) {
	case _WEP40_:
		keylen = 5;
		memcpy(&psetkeyparm->key[0], &psecuritypriv->dot11DefKey[keyid].skey[0], keylen);
		break;
	case _WEP104_:
		keylen = 13;
		memcpy(&psetkeyparm->key[0], &psecuritypriv->dot11DefKey[keyid].skey[0], keylen);
		break;
	case _TKIP_:
		keylen = 16;
		memcpy(&psetkeyparm->key, &psecuritypriv->dot118021XGrpKey[keyid], keylen);
		psetkeyparm->grpkey = 1;
		break;
	case _AES_:
		keylen = 16;
		memcpy(&psetkeyparm->key, &psecuritypriv->dot118021XGrpKey[keyid], keylen);
		psetkeyparm->grpkey = 1;
		break;
	default:
		kfree(psetkeyparm);
		kfree(pcmd);
		res = _FAIL;
		goto exit;
	}
	pcmd->cmdcode = _SetKey_CMD_;
	pcmd->parmbuf = (u8 *)psetkeyparm;
	pcmd->cmdsz =  (sizeof(struct setkey_parm));
	pcmd->rsp = NULL;
	pcmd->rspsz = 0;
	INIT_LIST_HEAD(&pcmd->list);
	res = rtw_enqueue_cmd(pcmdpriv, pcmd);
exit:
	return res;
}

/* adjust IEs for rtw_joinbss_cmd in WMM */
int rtw_restruct_wmm_ie(struct adapter *adapter, u8 *in_ie, u8 *out_ie, uint in_len, uint initial_out_len)
{
	unsigned	int ielength = 0;
	unsigned int i, j;

	i = 12; /* after the fixed IE */
	while (i < in_len) {
		ielength = initial_out_len;

		if (in_ie[i] == 0xDD && in_ie[i + 2] == 0x00 && in_ie[i + 3] == 0x50  && in_ie[i + 4] == 0xF2 && in_ie[i + 5] == 0x02 && i + 5 < in_len) {
			/* WMM element ID and OUI */
			/* Append WMM IE to the last index of out_ie */

			for (j = i; j < i + 9; j++) {
				out_ie[ielength] = in_ie[j];
				ielength++;
			}
			out_ie[initial_out_len + 1] = 0x07;
			out_ie[initial_out_len + 6] = 0x00;
			out_ie[initial_out_len + 8] = 0x00;
			break;
		}
		i += (in_ie[i + 1] + 2); /*  to the next IE element */
	}
	return ielength;
}

/*  */
/*  Search by BSSID, */
/*  Return Value: */
/*		-1		:if there is no pre-auth key in the  table */
/*		>= 0		:if there is pre-auth key, and   return the entry id */
/*  */
/*  */

static int SecIsInPMKIDList(struct adapter *Adapter, u8 *bssid)
{
	struct security_priv *p = &Adapter->securitypriv;
	int i;

	for (i = 0; i < NUM_PMKID_CACHE; i++)
		if (p->PMKIDList[i].bUsed && !memcmp(p->PMKIDList[i].Bssid, bssid, ETH_ALEN))
			return i;
	return -1;
}

/*  */
/*  Check the RSN IE length */
/*  If the RSN IE length <= 20, the RSN IE didn't include the PMKID information */
/*  0-11th element in the array are the fixed IE */
/*  12th element in the array is the IE */
/*  13th element in the array is the IE length */
/*  */

static int rtw_append_pmkid(struct adapter *Adapter, int iEntry, u8 *ie, uint ie_len)
{
	struct security_priv *psecuritypriv = &Adapter->securitypriv;

	if (ie[13] <= 20) {
		/*  The RSN IE didn't include the PMK ID, append the PMK information */
		ie[ie_len] = 1;
		ie_len++;
		ie[ie_len] = 0;	/* PMKID count = 0x0100 */
		ie_len++;
		memcpy(&ie[ie_len], &psecuritypriv->PMKIDList[iEntry].PMKID, 16);

		ie_len += 16;
		ie[13] += 18;/* PMKID length = 2+16 */
	}
	return ie_len;
}

int rtw_restruct_sec_ie(struct adapter *adapter, u8 *in_ie, u8 *out_ie, uint in_len)
{
	u8 authmode = 0;
	uint	ielength;
	int iEntry;
	struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
	struct security_priv *psecuritypriv = &adapter->securitypriv;
	uint	ndisauthmode = psecuritypriv->ndisauthtype;

	/* copy fixed ie only */
	memcpy(out_ie, in_ie, 12);
	ielength = 12;
	if ((ndisauthmode == Ndis802_11AuthModeWPA) ||
	    (ndisauthmode == Ndis802_11AuthModeWPAPSK))
			authmode = _WPA_IE_ID_;
	if ((ndisauthmode == Ndis802_11AuthModeWPA2) ||
	    (ndisauthmode == Ndis802_11AuthModeWPA2PSK))
		authmode = _WPA2_IE_ID_;

	if (check_fwstate(pmlmepriv, WIFI_UNDER_WPS)) {
		memcpy(out_ie + ielength, psecuritypriv->wps_ie, psecuritypriv->wps_ie_len);

		ielength += psecuritypriv->wps_ie_len;
	} else if ((authmode == _WPA_IE_ID_) || (authmode == _WPA2_IE_ID_)) {
		/* copy RSN or SSN */
		memcpy(&out_ie[ielength], &psecuritypriv->supplicant_ie[0], psecuritypriv->supplicant_ie[1] + 2);
		ielength += psecuritypriv->supplicant_ie[1] + 2;
		rtw_report_sec_ie(adapter, authmode, psecuritypriv->supplicant_ie);
	}

	iEntry = SecIsInPMKIDList(adapter, pmlmepriv->assoc_bssid);
	if (iEntry < 0) {
		return ielength;
	} else {
		if (authmode == _WPA2_IE_ID_)
			ielength = rtw_append_pmkid(adapter, iEntry, out_ie, ielength);
	}

	return ielength;
}

void rtw_init_registrypriv_dev_network(struct adapter *adapter)
{
	struct registry_priv *pregistrypriv = &adapter->registrypriv;
	struct eeprom_priv *peepriv = &adapter->eeprompriv;
	struct wlan_bssid_ex    *pdev_network = &pregistrypriv->dev_network;
	u8 *myhwaddr = myid(peepriv);

	memcpy(pdev_network->MacAddress, myhwaddr, ETH_ALEN);

	memcpy(&pdev_network->Ssid, &pregistrypriv->ssid, sizeof(struct ndis_802_11_ssid));

	pdev_network->Configuration.Length = sizeof(struct ndis_802_11_config);
	pdev_network->Configuration.BeaconPeriod = 100;
	pdev_network->Configuration.FHConfig.Length = 0;
	pdev_network->Configuration.FHConfig.HopPattern = 0;
	pdev_network->Configuration.FHConfig.HopSet = 0;
	pdev_network->Configuration.FHConfig.DwellTime = 0;

}

void rtw_update_registrypriv_dev_network(struct adapter *adapter)
{
	int sz = 0;
	struct registry_priv *pregistrypriv = &adapter->registrypriv;
	struct wlan_bssid_ex    *pdev_network = &pregistrypriv->dev_network;
	struct	security_priv *psecuritypriv = &adapter->securitypriv;
	struct	wlan_network	*cur_network = &adapter->mlmepriv.cur_network;

	pdev_network->Privacy = (psecuritypriv->dot11PrivacyAlgrthm > 0 ? 1 : 0); /*  adhoc no 802.1x */

	pdev_network->Rssi = 0;

	switch (pregistrypriv->wireless_mode) {
	case WIRELESS_11B:
		pdev_network->NetworkTypeInUse = (Ndis802_11DS);
		break;
	case WIRELESS_11G:
	case WIRELESS_11BG:
	case WIRELESS_11_24N:
	case WIRELESS_11G_24N:
	case WIRELESS_11BG_24N:
		pdev_network->NetworkTypeInUse = (Ndis802_11OFDM24);
		break;
	default:
		/*  TODO */
		break;
	}

	pdev_network->Configuration.DSConfig = (pregistrypriv->channel);

	if (cur_network->network.InfrastructureMode == Ndis802_11IBSS)
		pdev_network->Configuration.ATIMWindow = (0);

	pdev_network->InfrastructureMode = (cur_network->network.InfrastructureMode);

	/*  1. Supported rates */
	/*  2. IE */

	sz = rtw_generate_ie(pregistrypriv);
	pdev_network->IELength = sz;
	pdev_network->Length = get_wlan_bssid_ex_sz((struct wlan_bssid_ex  *)pdev_network);

	/* notes: translate IELength & Length after assign the Length to cmdsz in createbss_cmd(); */
	/* pdev_network->IELength = cpu_to_le32(sz); */

}

static void rtw_set_threshold(struct adapter *adapter)
{
	struct mlme_priv *mlmepriv = &adapter->mlmepriv;
	struct ht_priv *htpriv = &mlmepriv->htpriv;

	if (htpriv->ht_option && adapter->registrypriv.wifi_spec != 1) {
		/* validate usb rx aggregation, use init value. */
		rtw_write8(adapter, REG_RXDMA_AGG_PG_TH, USB_RXAGG_PAGE_COUNT);
	} else {
		/* invalidate usb rx aggregation */
		rtw_write8(adapter, REG_RXDMA_AGG_PG_TH, 1);
	}
}

/* the function is at passive_level */
void rtw_joinbss_reset(struct adapter *padapter)
{
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
	struct ht_priv		*phtpriv = &pmlmepriv->htpriv;

	/* todo: if you want to do something io/reg/hw setting before join_bss, please add code here */
	pmlmepriv->num_FortyMHzIntolerant = 0;

	pmlmepriv->num_sta_no_ht = 0;

	phtpriv->ampdu_enable = false;/* reset to disabled */

	rtw_set_threshold(padapter);
}

/* the function is >= passive_level */
unsigned int rtw_restructure_ht_ie(struct adapter *padapter, u8 *in_ie, u8 *out_ie, uint in_len, uint *pout_len)
{
	u32 ielen, out_len;
	unsigned char *p;
	struct ieee80211_ht_cap ht_capie;
	unsigned char WMM_IE[] = {0x00, 0x50, 0xf2, 0x02, 0x00, 0x01, 0x00};
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
	struct qos_priv		*pqospriv = &pmlmepriv->qospriv;
	struct ht_priv		*phtpriv = &pmlmepriv->htpriv;

	phtpriv->ht_option = false;

	p = rtw_get_ie(in_ie + 12, _HT_CAPABILITY_IE_, &ielen, in_len - 12);

	if (p && ielen > 0) {
		if (pqospriv->qos_option == 0) {
			out_len = *pout_len;
			rtw_set_ie(out_ie + out_len, _VENDOR_SPECIFIC_IE_,
				   _WMM_IE_Length_, WMM_IE, pout_len);

			pqospriv->qos_option = 1;
		}

		out_len = *pout_len;

		memset(&ht_capie, 0, sizeof(struct ieee80211_ht_cap));

		ht_capie.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
						IEEE80211_HT_CAP_SGI_20 |
						IEEE80211_HT_CAP_SGI_40 |
						IEEE80211_HT_CAP_TX_STBC |
						IEEE80211_HT_CAP_DSSSCCK40);

		/*
		AMPDU_para [1:0]:Max AMPDU Len => 0:8k , 1:16k, 2:32k, 3:64k
		AMPDU_para [4:2]:Min MPDU Start Spacing
		*/

		ht_capie.ampdu_params_info = (MAX_AMPDU_FACTOR_64K & 0x03);

		if (padapter->securitypriv.dot11PrivacyAlgrthm == _AES_)
			ht_capie.ampdu_params_info |= (IEEE80211_HT_AMPDU_PARM_DENSITY & (0x07 << 2));
		else
			ht_capie.ampdu_params_info |= (IEEE80211_HT_AMPDU_PARM_DENSITY & 0x00);

		rtw_set_ie(out_ie + out_len, _HT_CAPABILITY_IE_,
			   sizeof(struct ieee80211_ht_cap), (unsigned char *)&ht_capie, pout_len);

		phtpriv->ht_option = true;

		p = rtw_get_ie(in_ie + 12, _HT_ADD_INFO_IE_, &ielen, in_len - 12);
		if (p && (ielen == sizeof(struct ieee80211_ht_addt_info))) {
			out_len = *pout_len;
			rtw_set_ie(out_ie + out_len, _HT_ADD_INFO_IE_, ielen, p + 2, pout_len);
		}
	}
	return phtpriv->ht_option;
}

/* the function is > passive_level (in critical_section) */
void rtw_update_ht_cap(struct adapter *padapter, u8 *pie, uint ie_len)
{
	u8 *p, max_ampdu_sz;
	int len;
	struct ieee80211_ht_cap *pht_capie;
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
	struct ht_priv		*phtpriv = &pmlmepriv->htpriv;
	struct registry_priv *pregistrypriv = &padapter->registrypriv;
	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;

	if (!phtpriv->ht_option)
		return;

	if ((!pmlmeinfo->HT_info_enable) || (!pmlmeinfo->HT_caps_enable))
		return;

	/* maybe needs check if ap supports rx ampdu. */
	if ((!phtpriv->ampdu_enable) && (pregistrypriv->ampdu_enable == 1)) {
		if (pregistrypriv->wifi_spec == 1)
			phtpriv->ampdu_enable = false;
		else
			phtpriv->ampdu_enable = true;
	} else if (pregistrypriv->ampdu_enable == 2) {
		phtpriv->ampdu_enable = true;
	}

	/* check Max Rx A-MPDU Size */
	len = 0;
	p = rtw_get_ie(pie + sizeof(struct ndis_802_11_fixed_ie), _HT_CAPABILITY_IE_, &len, ie_len - sizeof(struct ndis_802_11_fixed_ie));
	if (p && len > 0) {
		pht_capie = (struct ieee80211_ht_cap *)(p + 2);
		max_ampdu_sz = (pht_capie->ampdu_params_info & IEEE80211_HT_AMPDU_PARM_FACTOR);
		max_ampdu_sz = 1 << (max_ampdu_sz + 3); /*  max_ampdu_sz (kbytes); */
		phtpriv->rx_ampdu_maxlen = max_ampdu_sz;
	}
	len = 0;
	p = rtw_get_ie(pie + sizeof(struct ndis_802_11_fixed_ie), _HT_ADD_INFO_IE_, &len, ie_len - sizeof(struct ndis_802_11_fixed_ie));

	/* update cur_bwmode & cur_ch_offset */
	if ((pregistrypriv->cbw40_enable) &&
	    (le16_to_cpu(pmlmeinfo->HT_caps.u.HT_cap_element.HT_caps_info) & BIT(1)) &&
	    (pmlmeinfo->HT_info.infos[0] & BIT(2))) {
		int i;

		/* update the MCS rates */
		for (i = 0; i < 16; i++)
			pmlmeinfo->HT_caps.u.HT_cap_element.MCS_rate[i] &= MCS_rate_1R[i];

		/* switch to the 40M Hz mode according to the AP */
		pmlmeext->cur_bwmode = HT_CHANNEL_WIDTH_40;
		switch ((pmlmeinfo->HT_info.infos[0] & 0x3)) {
		case HT_EXTCHNL_OFFSET_UPPER:
			pmlmeext->cur_ch_offset = HAL_PRIME_CHNL_OFFSET_LOWER;
			break;
		case HT_EXTCHNL_OFFSET_LOWER:
			pmlmeext->cur_ch_offset = HAL_PRIME_CHNL_OFFSET_UPPER;
			break;
		default:
			pmlmeext->cur_ch_offset = HAL_PRIME_CHNL_OFFSET_DONT_CARE;
			break;
		}
	}

	/*  Config SM Power Save setting */
	pmlmeinfo->SM_PS = (le16_to_cpu(pmlmeinfo->HT_caps.u.HT_cap_element.HT_caps_info) & 0x0C) >> 2;

	/*  Config current HT Protection mode. */
	pmlmeinfo->HT_protection = pmlmeinfo->HT_info.infos[1] & 0x3;
}

void rtw_issue_addbareq_cmd(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
	u8 issued;
	int priority;
	struct sta_info *psta = NULL;
	struct ht_priv	*phtpriv;
	struct pkt_attrib *pattrib = &pxmitframe->attrib;

	if (is_multicast_ether_addr(pattrib->ra) ||
	    padapter->mlmepriv.LinkDetectInfo.NumTxOkInPeriod < 100)
		return;

	priority = pattrib->priority;

	if (pattrib->psta)
		psta = pattrib->psta;
	else
		psta = rtw_get_stainfo(&padapter->stapriv, pattrib->ra);

	if (!psta)
		return;

	phtpriv = &psta->htpriv;

	if ((phtpriv->ht_option) && (phtpriv->ampdu_enable)) {
		issued = (phtpriv->agg_enable_bitmap >> priority) & 0x1;
		issued |= (phtpriv->candidate_tid_bitmap >> priority) & 0x1;

		if (issued == 0) {
			psta->htpriv.candidate_tid_bitmap |= BIT((u8)priority);
			rtw_addbareq_cmd(padapter, (u8)priority, pattrib->ra);
		}
	}
}

void rtw_roaming(struct adapter *padapter, struct wlan_network *tgt_network)
{
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;

	spin_lock_bh(&pmlmepriv->lock);
	_rtw_roaming(padapter, tgt_network);
	spin_unlock_bh(&pmlmepriv->lock);
}
void _rtw_roaming(struct adapter *padapter, struct wlan_network *tgt_network)
{
	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
	int do_join_r;

	struct wlan_network *pnetwork;

	if (tgt_network)
		pnetwork = tgt_network;
	else
		pnetwork = &pmlmepriv->cur_network;

	if (rtw_to_roaming(padapter) > 0) {
		memcpy(&pmlmepriv->assoc_ssid, &pnetwork->network.Ssid, sizeof(struct ndis_802_11_ssid));

		pmlmepriv->assoc_by_bssid = false;

		while (1) {
			do_join_r = rtw_do_join(padapter);
			if (do_join_r == _SUCCESS) {
				break;
			} else {
				pmlmepriv->to_roaming--;

				if (pmlmepriv->to_roaming > 0) {
					continue;
				} else {
					rtw_indicate_disconnect(padapter);
					break;
				}
			}
		}
	}
}