// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
 *
 ******************************************************************************/
#include <drv_types.h>
#include <rtw_debug.h>
#include <linux/jiffies.h>
#include <rtw_recv.h>
#include <net/cfg80211.h>
#include <asm/unaligned.h>

static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};

static void rtw_signal_stat_timer_hdl(struct timer_list *t);

void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
{
        memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));

        spin_lock_init(&psta_recvpriv->lock);

        /* for (i = 0; i<MAX_RX_NUMBLKS; i++) */
        /* _rtw_init_queue(&psta_recvpriv->blk_strms[i]); */

        _rtw_init_queue(&psta_recvpriv->defrag_q);
}

signed int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
{
        signed int i;
        union recv_frame *precvframe;
        signed int      res = _SUCCESS;

        spin_lock_init(&precvpriv->lock);

        _rtw_init_queue(&precvpriv->free_recv_queue);
        _rtw_init_queue(&precvpriv->recv_pending_queue);
        _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);

        precvpriv->adapter = padapter;

        precvpriv->free_recvframe_cnt = NR_RECVFRAME;

        precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);

        if (!precvpriv->pallocated_frame_buf) {
                res = _FAIL;
                goto exit;
        }

        precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
        /* precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + RXFRAME_ALIGN_SZ - */
        /* ((SIZE_PTR) (precvpriv->pallocated_frame_buf) &(RXFRAME_ALIGN_SZ-1)); */

        precvframe = (union recv_frame *) precvpriv->precv_frame_buf;


        for (i = 0; i < NR_RECVFRAME; i++) {
                INIT_LIST_HEAD(&(precvframe->u.list));

                list_add_tail(&(precvframe->u.list), &(precvpriv->free_recv_queue.queue));

                rtw_os_recv_resource_alloc(padapter, precvframe);

                precvframe->u.hdr.len = 0;

                precvframe->u.hdr.adapter = padapter;
                precvframe++;

        }

        res = rtw_hal_init_recv_priv(padapter);

        timer_setup(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl,
                    0);

        precvpriv->signal_stat_sampling_interval = 2000; /* ms */

        rtw_set_signal_stat_timer(precvpriv);

exit:
        return res;
}

void _rtw_free_recv_priv(struct recv_priv *precvpriv)
{
        struct adapter  *padapter = precvpriv->adapter;

        rtw_free_uc_swdec_pending_queue(padapter);

        rtw_os_recv_resource_free(precvpriv);

        vfree(precvpriv->pallocated_frame_buf);

        rtw_hal_free_recv_priv(padapter);
}

union recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{

        union recv_frame  *precvframe;
        struct list_head        *plist, *phead;
        struct adapter *padapter;
        struct recv_priv *precvpriv;

        if (list_empty(&pfree_recv_queue->queue))
                precvframe = NULL;
        else {
                phead = get_list_head(pfree_recv_queue);

                plist = get_next(phead);

                precvframe = (union recv_frame *)plist;

                list_del_init(&precvframe->u.hdr.list);
                padapter = precvframe->u.hdr.adapter;
                if (padapter) {
                        precvpriv = &padapter->recvpriv;
                        if (pfree_recv_queue == &precvpriv->free_recv_queue)
                                precvpriv->free_recvframe_cnt--;
                }
        }
        return precvframe;
}

union recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{
        union recv_frame  *precvframe;

        spin_lock_bh(&pfree_recv_queue->lock);

        precvframe = _rtw_alloc_recvframe(pfree_recv_queue);

        spin_unlock_bh(&pfree_recv_queue->lock);

        return precvframe;
}

int rtw_free_recvframe(union recv_frame *precvframe, struct __queue *pfree_recv_queue)
{
        struct adapter *padapter = precvframe->u.hdr.adapter;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        rtw_os_free_recvframe(precvframe);


        spin_lock_bh(&pfree_recv_queue->lock);

        list_del_init(&(precvframe->u.hdr.list));

        precvframe->u.hdr.len = 0;

        list_add_tail(&(precvframe->u.hdr.list), get_list_head(pfree_recv_queue));

        if (padapter) {
                if (pfree_recv_queue == &precvpriv->free_recv_queue)
                                precvpriv->free_recvframe_cnt++;
        }
        spin_unlock_bh(&pfree_recv_queue->lock);
        return _SUCCESS;
}




signed int _rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue)
{

        struct adapter *padapter = precvframe->u.hdr.adapter;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        /* INIT_LIST_HEAD(&(precvframe->u.hdr.list)); */
        list_del_init(&(precvframe->u.hdr.list));


        list_add_tail(&(precvframe->u.hdr.list), get_list_head(queue));

        if (padapter)
                if (queue == &precvpriv->free_recv_queue)
                        precvpriv->free_recvframe_cnt++;

        return _SUCCESS;
}

signed int rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue)
{
        signed int ret;

        /* _spinlock(&pfree_recv_queue->lock); */
        spin_lock_bh(&queue->lock);
        ret = _rtw_enqueue_recvframe(precvframe, queue);
        /* spin_unlock(&pfree_recv_queue->lock); */
        spin_unlock_bh(&queue->lock);

        return ret;
}

/*
signed int      rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue)
{
        return rtw_free_recvframe(precvframe, queue);
}
*/




/*
caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
pframequeue: defrag_queue : will be accessed in recv_thread  (passive)

using spinlock to protect

*/

void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
{
        union   recv_frame      *precvframe;
        struct list_head        *plist, *phead;

        spin_lock(&pframequeue->lock);

        phead = get_list_head(pframequeue);
        plist = get_next(phead);

        while (phead != plist) {
                precvframe = (union recv_frame *)plist;

                plist = get_next(plist);

                rtw_free_recvframe(precvframe, pfree_recv_queue);
        }

        spin_unlock(&pframequeue->lock);
}

u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
{
        u32 cnt = 0;
        union recv_frame *pending_frame;
        while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
                rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
                cnt++;
        }

        return cnt;
}


signed int rtw_enqueue_recvbuf_to_head(struct recv_buf *precvbuf, struct __queue *queue)
{
        spin_lock_bh(&queue->lock);

        list_del_init(&precvbuf->list);
        list_add(&precvbuf->list, get_list_head(queue));

        spin_unlock_bh(&queue->lock);

        return _SUCCESS;
}

signed int rtw_enqueue_recvbuf(struct recv_buf *precvbuf, struct __queue *queue)
{
        spin_lock_bh(&queue->lock);

        list_del_init(&precvbuf->list);

        list_add_tail(&precvbuf->list, get_list_head(queue));
        spin_unlock_bh(&queue->lock);
        return _SUCCESS;

}

struct recv_buf *rtw_dequeue_recvbuf(struct __queue *queue)
{
        struct recv_buf *precvbuf;
        struct list_head        *plist, *phead;

        spin_lock_bh(&queue->lock);

        if (list_empty(&queue->queue))
                precvbuf = NULL;
        else {
                phead = get_list_head(queue);

                plist = get_next(phead);

                precvbuf = container_of(plist, struct recv_buf, list);

                list_del_init(&precvbuf->list);

        }

        spin_unlock_bh(&queue->lock);

        return precvbuf;

}

static signed int recvframe_chkmic(struct adapter *adapter,  union recv_frame *precvframe)
{

        signed int      i, res = _SUCCESS;
        u32 datalen;
        u8 miccode[8];
        u8 bmic_err = false, brpt_micerror = true;
        u8 *pframe, *payload, *pframemic;
        u8 *mickey;
        /* u8 *iv, rxdata_key_idx = 0; */
        struct sta_info *stainfo;
        struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib;
        struct security_priv *psecuritypriv = &adapter->securitypriv;

        struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
        struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);

        stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);

        if (prxattrib->encrypt == _TKIP_) {
                /* calculate mic code */
                if (stainfo) {
                        if (IS_MCAST(prxattrib->ra)) {
                                /* mickey =&psecuritypriv->dot118021XGrprxmickey.skey[0]; */
                                /* iv = precvframe->u.hdr.rx_data+prxattrib->hdrlen; */
                                /* rxdata_key_idx =(((iv[3])>>6)&0x3) ; */
                                mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];

                                /* psecuritypriv->dot118021XGrpKeyid, pmlmeinfo->key_index, rxdata_key_idx); */

                                if (psecuritypriv->binstallGrpkey == false) {
                                        res = _FAIL;
                                        goto exit;
                                }
                        } else {
                                mickey = &stainfo->dot11tkiprxmickey.skey[0];
                        }

                        datalen = precvframe->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len-prxattrib->icv_len-8;/* icv_len included the mic code */
                        pframe = precvframe->u.hdr.rx_data;
                        payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;

                        rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0], (unsigned char)prxattrib->priority); /* care the length of the data */

                        pframemic = payload+datalen;

                        bmic_err = false;

                        for (i = 0; i < 8; i++) {
                                if (miccode[i] != *(pframemic + i))
                                        bmic_err = true;
                        }


                        if (bmic_err == true) {
                                /*  double check key_index for some timing issue , */
                                /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
                                if ((IS_MCAST(prxattrib->ra) == true)  && (prxattrib->key_index != pmlmeinfo->key_index))
                                        brpt_micerror = false;

                                if (prxattrib->bdecrypted && brpt_micerror)
                                        rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));

                                res = _FAIL;

                        } else {
                                /* mic checked ok */
                                if (!psecuritypriv->bcheck_grpkey &&
                                    IS_MCAST(prxattrib->ra))
                                        psecuritypriv->bcheck_grpkey = true;
                        }
                }

                recvframe_pull_tail(precvframe, 8);

        }

exit:
        return res;

}

/* decrypt and set the ivlen, icvlen of the recv_frame */
static union recv_frame *decryptor(struct adapter *padapter, union recv_frame *precv_frame)
{

        struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib;
        struct security_priv *psecuritypriv = &padapter->securitypriv;
        union recv_frame *return_packet = precv_frame;
        u32  res = _SUCCESS;

        if (prxattrib->encrypt > 0) {
                u8 *iv = precv_frame->u.hdr.rx_data+prxattrib->hdrlen;
                prxattrib->key_index = (((iv[3])>>6)&0x3);

                if (prxattrib->key_index > WEP_KEYS) {
                        switch (prxattrib->encrypt) {
                        case _WEP40_:
                        case _WEP104_:
                                prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
                                break;
                        case _TKIP_:
                        case _AES_:
                        default:
                                prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
                                break;
                        }
                }
        }

        if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt == true))) {
                psecuritypriv->hw_decrypted = false;

                switch (prxattrib->encrypt) {
                case _WEP40_:
                case _WEP104_:
                        rtw_wep_decrypt(padapter, (u8 *)precv_frame);
                        break;
                case _TKIP_:
                        res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
                        break;
                case _AES_:
                        res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
                        break;
                default:
                                break;
                }
        } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
                   (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_)
                ) {
                psecuritypriv->hw_decrypted = true;
        } else {
        }

        if (res == _FAIL) {
                rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
                return_packet = NULL;
        } else
                prxattrib->bdecrypted = true;

        return return_packet;
}

/* set the security information in the recv_frame */
static union recv_frame *portctrl(struct adapter *adapter, union recv_frame *precv_frame)
{
        u8 *psta_addr = NULL;
        u8 *ptr;
        uint  auth_alg;
        struct recv_frame_hdr *pfhdr;
        struct sta_info *psta;
        struct sta_priv *pstapriv;
        union recv_frame *prtnframe;
        u16 ether_type = 0;
        u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
        struct rx_pkt_attrib *pattrib;

        pstapriv = &adapter->stapriv;

        auth_alg = adapter->securitypriv.dot11AuthAlgrthm;

        ptr = get_recvframe_data(precv_frame);
        pfhdr = &precv_frame->u.hdr;
        pattrib = &pfhdr->attrib;
        psta_addr = pattrib->ta;

        prtnframe = NULL;

        psta = rtw_get_stainfo(pstapriv, psta_addr);

        if (auth_alg == 2) {
                if ((psta) && (psta->ieee8021x_blocked)) {
                        __be16 be_tmp;

                        /* blocked */
                        /* only accept EAPOL frame */

                        prtnframe = precv_frame;

                        /* get ether_type */
                        ptr = ptr + pfhdr->attrib.hdrlen + pfhdr->attrib.iv_len + LLC_HEADER_LENGTH;
                        memcpy(&be_tmp, ptr, 2);
                        ether_type = ntohs(be_tmp);

                        if (ether_type == eapol_type)
                                prtnframe = precv_frame;
                        else {
                                /* free this frame */
                                rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
                                prtnframe = NULL;
                        }
                } else {
                        /* allowed */
                        /* check decryption status, and decrypt the frame if needed */

                        prtnframe = precv_frame;
                        /* check is the EAPOL frame or not (Rekey) */
                        /* if (ether_type == eapol_type) { */
                                /* check Rekey */

                        /* prtnframe =precv_frame; */
                        /*  */
                        /* else { */
                        /*  */
                }
        } else
                prtnframe = precv_frame;

        return prtnframe;
}

static signed int recv_decache(union recv_frame *precv_frame, u8 bretry, struct stainfo_rxcache *prxcache)
{
        signed int tid = precv_frame->u.hdr.attrib.priority;

        u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) |
                (precv_frame->u.hdr.attrib.frag_num & 0xf);

        if (tid > 15)
                return _FAIL;

        if (1) { /* if (bretry) */
                if (seq_ctrl == prxcache->tid_rxseq[tid])
                        return _FAIL;
        }

        prxcache->tid_rxseq[tid] = seq_ctrl;

        return _SUCCESS;

}

static void process_pwrbit_data(struct adapter *padapter, union recv_frame *precv_frame)
{
        unsigned char pwrbit;
        u8 *ptr = precv_frame->u.hdr.rx_data;
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *psta = NULL;

        psta = rtw_get_stainfo(pstapriv, pattrib->src);

        pwrbit = GetPwrMgt(ptr);

        if (psta) {
                if (pwrbit) {
                        if (!(psta->state & WIFI_SLEEP_STATE)) {
                                /* psta->state |= WIFI_SLEEP_STATE; */
                                /* pstapriv->sta_dz_bitmap |= BIT(psta->aid); */

                                stop_sta_xmit(padapter, psta);

                        }
                } else {
                        if (psta->state & WIFI_SLEEP_STATE) {
                                /* psta->state ^= WIFI_SLEEP_STATE; */
                                /* pstapriv->sta_dz_bitmap &= ~BIT(psta->aid); */

                                wakeup_sta_to_xmit(padapter, psta);
                        }
                }

        }
}

static void process_wmmps_data(struct adapter *padapter, union recv_frame *precv_frame)
{
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *psta = NULL;

        psta = rtw_get_stainfo(pstapriv, pattrib->src);

        if (!psta)
                return;

        if (!psta->qos_option)
                return;

        if (!(psta->qos_info&0xf))
                return;

        if (psta->state&WIFI_SLEEP_STATE) {
                u8 wmmps_ac = 0;

                switch (pattrib->priority) {
                case 1:
                case 2:
                        wmmps_ac = psta->uapsd_bk&BIT(1);
                        break;
                case 4:
                case 5:
                        wmmps_ac = psta->uapsd_vi&BIT(1);
                        break;
                case 6:
                case 7:
                        wmmps_ac = psta->uapsd_vo&BIT(1);
                        break;
                case 0:
                case 3:
                default:
                        wmmps_ac = psta->uapsd_be&BIT(1);
                        break;
                }

                if (wmmps_ac) {
                        if (psta->sleepq_ac_len > 0)
                                /* process received triggered frame */
                                xmit_delivery_enabled_frames(padapter, psta);
                        else
                                /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
                                issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
                }
        }
}

static void count_rx_stats(struct adapter *padapter, union recv_frame *prframe, struct sta_info *sta)
{
        int sz;
        struct sta_info *psta = NULL;
        struct stainfo_stats *pstats = NULL;
        struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        sz = get_recvframe_len(prframe);
        precvpriv->rx_bytes += sz;

        padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;

        if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
                padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;

        if (sta)
                psta = sta;
        else
                psta = prframe->u.hdr.psta;

        if (psta) {
                pstats = &psta->sta_stats;

                pstats->rx_data_pkts++;
                pstats->rx_bytes += sz;
        }

        traffic_check_for_leave_lps(padapter, false, 0);
}

static signed int sta2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
                        struct sta_info **psta)
{
        u8 *ptr = precv_frame->u.hdr.rx_data;
        signed int ret = _SUCCESS;
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        struct sta_priv *pstapriv = &adapter->stapriv;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        u8 *mybssid  = get_bssid(pmlmepriv);
        u8 *myhwaddr = myid(&adapter->eeprompriv);
        u8 *sta_addr = NULL;
        signed int bmcast = IS_MCAST(pattrib->dst);

        if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
                (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {

                /*  filter packets that SA is myself or multicast or broadcast */
                if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
                        ret = _FAIL;
                        goto exit;
                }

                if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN))  && (!bmcast)) {
                        ret = _FAIL;
                        goto exit;
                }

                if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
                   !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
                   (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
                        ret = _FAIL;
                        goto exit;
                }

                sta_addr = pattrib->src;

        } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
                /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
                if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
                        ret = _FAIL;
                        goto exit;
                }

                sta_addr = pattrib->bssid;
        } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
                if (bmcast) {
                        /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
                        if (!IS_MCAST(pattrib->bssid)) {
                                        ret = _FAIL;
                                        goto exit;
                        }
                } else { /*  not mc-frame */
                        /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
                        if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
                                ret = _FAIL;
                                goto exit;
                        }

                        sta_addr = pattrib->src;
                }

        } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
                memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
                memcpy(pattrib->ta, pattrib->src, ETH_ALEN);

                sta_addr = mybssid;
        } else
                ret  = _FAIL;



        if (bmcast)
                *psta = rtw_get_bcmc_stainfo(adapter);
        else
                *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */

        if (!*psta) {
                ret = _FAIL;
                goto exit;
        }

exit:
        return ret;
}

static signed int ap2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
                       struct sta_info **psta)
{
        u8 *ptr = precv_frame->u.hdr.rx_data;
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        signed int ret = _SUCCESS;
        struct sta_priv *pstapriv = &adapter->stapriv;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        u8 *mybssid  = get_bssid(pmlmepriv);
        u8 *myhwaddr = myid(&adapter->eeprompriv);
        signed int bmcast = IS_MCAST(pattrib->dst);

        if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
            (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
             check_fwstate(pmlmepriv, _FW_UNDER_LINKING) == true)
                ) {

                /*  filter packets that SA is myself or multicast or broadcast */
                if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
                        ret = _FAIL;
                        goto exit;
                }

                /*  da should be for me */
                if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
                        ret = _FAIL;
                        goto exit;
                }


                /*  check BSSID */
                if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
                     (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {

                        if (!bmcast)
                                issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);

                        ret = _FAIL;
                        goto exit;
                }

                if (bmcast)
                        *psta = rtw_get_bcmc_stainfo(adapter);
                else
                        *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */

                if (!*psta) {
                        ret = _FAIL;
                        goto exit;
                }

                if (GetFrameSubType(ptr) & BIT(6)) {
                        /* No data, will not indicate to upper layer, temporily count it here */
                        count_rx_stats(adapter, precv_frame, *psta);
                        ret = RTW_RX_HANDLED;
                        goto exit;
                }

        } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
                     (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
                memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
                memcpy(pattrib->ta, pattrib->src, ETH_ALEN);

                /*  */
                memcpy(pattrib->bssid,  mybssid, ETH_ALEN);


                *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
                if (!*psta) {
                        ret = _FAIL;
                        goto exit;
                }


        } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
                /* Special case */
                ret = RTW_RX_HANDLED;
                goto exit;
        } else {
                if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
                        *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
                        if (!*psta) {

                                /* for AP multicast issue , modify by yiwei */
                                static unsigned long send_issue_deauth_time;

                                if (jiffies_to_msecs(jiffies - send_issue_deauth_time) > 10000 || send_issue_deauth_time == 0) {
                                        send_issue_deauth_time = jiffies;

                                        issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
                                }
                        }
                }

                ret = _FAIL;
        }

exit:
        return ret;
}

static signed int sta2ap_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
                       struct sta_info **psta)
{
        u8 *ptr = precv_frame->u.hdr.rx_data;
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        struct sta_priv *pstapriv = &adapter->stapriv;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        unsigned char *mybssid  = get_bssid(pmlmepriv);
        signed int ret = _SUCCESS;

        if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
                /* For AP mode, RA =BSSID, TX =STA(SRC_ADDR), A3 =DST_ADDR */
                if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
                        ret = _FAIL;
                        goto exit;
                }

                *psta = rtw_get_stainfo(pstapriv, pattrib->src);
                if (!*psta) {
                        issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);

                        ret = RTW_RX_HANDLED;
                        goto exit;
                }

                process_pwrbit_data(adapter, precv_frame);

                if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE)
                        process_wmmps_data(adapter, precv_frame);

                if (GetFrameSubType(ptr) & BIT(6)) {
                        /* No data, will not indicate to upper layer, temporily count it here */
                        count_rx_stats(adapter, precv_frame, *psta);
                        ret = RTW_RX_HANDLED;
                        goto exit;
                }
        } else {
                u8 *myhwaddr = myid(&adapter->eeprompriv);
                if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
                        ret = RTW_RX_HANDLED;
                        goto exit;
                }
                issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
                ret = RTW_RX_HANDLED;
                goto exit;
        }

exit:
        return ret;
}

static signed int validate_recv_ctrl_frame(struct adapter *padapter, union recv_frame *precv_frame)
{
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        u8 *pframe = precv_frame->u.hdr.rx_data;
        struct sta_info *psta = NULL;
        /* uint len = precv_frame->u.hdr.len; */

        if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
                return _FAIL;

        /* receive the frames that ra(a1) is my address */
        if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
                return _FAIL;

        psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
        if (!psta)
                return _FAIL;

        /* for rx pkt statistics */
        psta->sta_stats.rx_ctrl_pkts++;

        /* only handle ps-poll */
        if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
                u16 aid;
                u8 wmmps_ac = 0;

                aid = GetAid(pframe);
                if (psta->aid != aid)
                        return _FAIL;

                switch (pattrib->priority) {
                case 1:
                case 2:
                        wmmps_ac = psta->uapsd_bk&BIT(0);
                        break;
                case 4:
                case 5:
                        wmmps_ac = psta->uapsd_vi&BIT(0);
                        break;
                case 6:
                case 7:
                        wmmps_ac = psta->uapsd_vo&BIT(0);
                        break;
                case 0:
                case 3:
                default:
                        wmmps_ac = psta->uapsd_be&BIT(0);
                        break;
                }

                if (wmmps_ac)
                        return _FAIL;

                if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
                        psta->expire_to = pstapriv->expire_to;
                        psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
                }

                if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
                        struct list_head        *xmitframe_plist, *xmitframe_phead;
                        struct xmit_frame *pxmitframe = NULL;
                        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

                        /* spin_lock_bh(&psta->sleep_q.lock); */
                        spin_lock_bh(&pxmitpriv->lock);

                        xmitframe_phead = get_list_head(&psta->sleep_q);
                        xmitframe_plist = get_next(xmitframe_phead);

                        if (xmitframe_phead != xmitframe_plist) {
                                pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);

                                xmitframe_plist = get_next(xmitframe_plist);

                                list_del_init(&pxmitframe->list);

                                psta->sleepq_len--;

                                if (psta->sleepq_len > 0)
                                        pxmitframe->attrib.mdata = 1;
                                else
                                        pxmitframe->attrib.mdata = 0;

                                pxmitframe->attrib.triggered = 1;

                                rtw_hal_xmitframe_enqueue(padapter, pxmitframe);

                                if (psta->sleepq_len == 0) {
                                        pstapriv->tim_bitmap &= ~BIT(psta->aid);

                                        /* update BCN for TIM IE */
                                        /* update_BCNTIM(padapter); */
                                        update_beacon(padapter, WLAN_EID_TIM, NULL, true);
                                }

                                /* spin_unlock_bh(&psta->sleep_q.lock); */
                                spin_unlock_bh(&pxmitpriv->lock);

                        } else {
                                /* spin_unlock_bh(&psta->sleep_q.lock); */
                                spin_unlock_bh(&pxmitpriv->lock);

                                if (pstapriv->tim_bitmap&BIT(psta->aid)) {
                                        if (psta->sleepq_len == 0) {
                                                /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
                                                issue_nulldata_in_interrupt(padapter, psta->hwaddr);

                                        } else {
                                                psta->sleepq_len = 0;
                                        }

                                        pstapriv->tim_bitmap &= ~BIT(psta->aid);

                                        /* update BCN for TIM IE */
                                        /* update_BCNTIM(padapter); */
                                        update_beacon(padapter, WLAN_EID_TIM, NULL, true);
                                }
                        }
                }
        }

        return _FAIL;

}

/* perform defrag */
static union recv_frame *recvframe_defrag(struct adapter *adapter,
                                          struct __queue *defrag_q)
{
        struct list_head         *plist, *phead;
        u8  wlanhdr_offset;
        u8 curfragnum;
        struct recv_frame_hdr *pfhdr, *pnfhdr;
        union recv_frame *prframe, *pnextrframe;
        struct __queue  *pfree_recv_queue;

        curfragnum = 0;
        pfree_recv_queue = &adapter->recvpriv.free_recv_queue;

        phead = get_list_head(defrag_q);
        plist = get_next(phead);
        prframe = (union recv_frame *)plist;
        pfhdr = &prframe->u.hdr;
        list_del_init(&(prframe->u.list));

        if (curfragnum != pfhdr->attrib.frag_num) {
                /* the first fragment number must be 0 */
                /* free the whole queue */
                rtw_free_recvframe(prframe, pfree_recv_queue);
                rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);

                return NULL;
        }

        curfragnum++;

        plist = get_list_head(defrag_q);

        plist = get_next(plist);

        while (phead != plist) {
                pnextrframe = (union recv_frame *)plist;
                pnfhdr = &pnextrframe->u.hdr;


                /* check the fragment sequence  (2nd ~n fragment frame) */

                if (curfragnum != pnfhdr->attrib.frag_num) {
                        /* the fragment number must be increasing  (after decache) */
                        /* release the defrag_q & prframe */
                        rtw_free_recvframe(prframe, pfree_recv_queue);
                        rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
                        return NULL;
                }

                curfragnum++;

                /* copy the 2nd~n fragment frame's payload to the first fragment */
                /* get the 2nd~last fragment frame's payload */

                wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;

                recvframe_pull(pnextrframe, wlanhdr_offset);

                /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
                recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);

                /* memcpy */
                memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);

                recvframe_put(prframe, pnfhdr->len);

                pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
                plist = get_next(plist);

        }

        /* free the defrag_q queue and return the prframe */
        rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);

        return prframe;
}

/* check if need to defrag, if needed queue the frame to defrag_q */
static union recv_frame *recvframe_chk_defrag(struct adapter *padapter, union recv_frame *precv_frame)
{
        u8 ismfrag;
        u8 fragnum;
        u8 *psta_addr;
        struct recv_frame_hdr *pfhdr;
        struct sta_info *psta;
        struct sta_priv *pstapriv;
        struct list_head *phead;
        union recv_frame *prtnframe = NULL;
        struct __queue *pfree_recv_queue, *pdefrag_q;

        pstapriv = &padapter->stapriv;

        pfhdr = &precv_frame->u.hdr;

        pfree_recv_queue = &padapter->recvpriv.free_recv_queue;

        /* need to define struct of wlan header frame ctrl */
        ismfrag = pfhdr->attrib.mfrag;
        fragnum = pfhdr->attrib.frag_num;

        psta_addr = pfhdr->attrib.ta;
        psta = rtw_get_stainfo(pstapriv, psta_addr);
        if (!psta) {
                u8 type = GetFrameType(pfhdr->rx_data);
                if (type != WIFI_DATA_TYPE) {
                        psta = rtw_get_bcmc_stainfo(padapter);
                        pdefrag_q = &psta->sta_recvpriv.defrag_q;
                } else
                        pdefrag_q = NULL;
        } else
                pdefrag_q = &psta->sta_recvpriv.defrag_q;

        if ((ismfrag == 0) && (fragnum == 0))
                prtnframe = precv_frame;/* isn't a fragment frame */

        if (ismfrag == 1) {
                /* 0~(n-1) fragment frame */
                /* enqueue to defraf_g */
                if (pdefrag_q) {
                        if (fragnum == 0)
                                /* the first fragment */
                                if (!list_empty(&pdefrag_q->queue))
                                        /* free current defrag_q */
                                        rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);


                        /* Then enqueue the 0~(n-1) fragment into the defrag_q */

                        /* spin_lock(&pdefrag_q->lock); */
                        phead = get_list_head(pdefrag_q);
                        list_add_tail(&pfhdr->list, phead);
                        /* spin_unlock(&pdefrag_q->lock); */

                        prtnframe = NULL;

                } else {
                        /* can't find this ta's defrag_queue, so free this recv_frame */
                        rtw_free_recvframe(precv_frame, pfree_recv_queue);
                        prtnframe = NULL;
                }

        }

        if ((ismfrag == 0) && (fragnum != 0)) {
                /* the last fragment frame */
                /* enqueue the last fragment */
                if (pdefrag_q) {
                        /* spin_lock(&pdefrag_q->lock); */
                        phead = get_list_head(pdefrag_q);
                        list_add_tail(&pfhdr->list, phead);
                        /* spin_unlock(&pdefrag_q->lock); */

                        /* call recvframe_defrag to defrag */
                        precv_frame = recvframe_defrag(padapter, pdefrag_q);
                        prtnframe = precv_frame;

                } else {
                        /* can't find this ta's defrag_queue, so free this recv_frame */
                        rtw_free_recvframe(precv_frame, pfree_recv_queue);
                        prtnframe = NULL;
                }

        }


        if ((prtnframe) && (prtnframe->u.hdr.attrib.privacy)) {
                /* after defrag we must check tkip mic code */
                if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
                        rtw_free_recvframe(prtnframe, pfree_recv_queue);
                        prtnframe = NULL;
                }
        }
        return prtnframe;
}

static signed int validate_recv_mgnt_frame(struct adapter *padapter, union recv_frame *precv_frame)
{
        /* struct mlme_priv *pmlmepriv = &adapter->mlmepriv; */

        precv_frame = recvframe_chk_defrag(padapter, precv_frame);
        if (!precv_frame)
                return _SUCCESS;

        {
                /* for rx pkt statistics */
                struct sta_info *psta = rtw_get_stainfo(&padapter->stapriv, GetAddr2Ptr(precv_frame->u.hdr.rx_data));
                if (psta) {
                        psta->sta_stats.rx_mgnt_pkts++;
                        if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_BEACON)
                                psta->sta_stats.rx_beacon_pkts++;
                        else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBEREQ)
                                psta->sta_stats.rx_probereq_pkts++;
                        else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBERSP) {
                                if (!memcmp(padapter->eeprompriv.mac_addr, GetAddr1Ptr(precv_frame->u.hdr.rx_data), ETH_ALEN))
                                        psta->sta_stats.rx_probersp_pkts++;
                                else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.rx_data)) ||
                                         is_multicast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.rx_data)))
                                        psta->sta_stats.rx_probersp_bm_pkts++;
                                else
                                        psta->sta_stats.rx_probersp_uo_pkts++;
                        }
                }
        }

        mgt_dispatcher(padapter, precv_frame);

        return _SUCCESS;

}

static signed int validate_recv_data_frame(struct adapter *adapter, union recv_frame *precv_frame)
{
        u8 bretry;
        u8 *psa, *pda, *pbssid;
        struct sta_info *psta = NULL;
        u8 *ptr = precv_frame->u.hdr.rx_data;
        struct rx_pkt_attrib    *pattrib = &precv_frame->u.hdr.attrib;
        struct security_priv *psecuritypriv = &adapter->securitypriv;
        signed int ret = _SUCCESS;

        bretry = GetRetry(ptr);
        pda = get_da(ptr);
        psa = get_sa(ptr);
        pbssid = get_hdr_bssid(ptr);

        if (!pbssid) {
                ret = _FAIL;
                goto exit;
        }

        memcpy(pattrib->dst, pda, ETH_ALEN);
        memcpy(pattrib->src, psa, ETH_ALEN);

        memcpy(pattrib->bssid, pbssid, ETH_ALEN);

        switch (pattrib->to_fr_ds) {
        case 0:
                memcpy(pattrib->ra, pda, ETH_ALEN);
                memcpy(pattrib->ta, psa, ETH_ALEN);
                ret = sta2sta_data_frame(adapter, precv_frame, &psta);
                break;

        case 1:
                memcpy(pattrib->ra, pda, ETH_ALEN);
                memcpy(pattrib->ta, pbssid, ETH_ALEN);
                ret = ap2sta_data_frame(adapter, precv_frame, &psta);
                break;

        case 2:
                memcpy(pattrib->ra, pbssid, ETH_ALEN);
                memcpy(pattrib->ta, psa, ETH_ALEN);
                ret = sta2ap_data_frame(adapter, precv_frame, &psta);
                break;

        case 3:
                memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
                memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
                ret = _FAIL;
                break;

        default:
                ret = _FAIL;
                break;

        }

        if (ret == _FAIL) {
                goto exit;
        } else if (ret == RTW_RX_HANDLED) {
                goto exit;
        }


        if (!psta) {
                ret = _FAIL;
                goto exit;
        }

        /* psta->rssi = prxcmd->rssi; */
        /* psta->signal_quality = prxcmd->sq; */
        precv_frame->u.hdr.psta = psta;


        pattrib->amsdu = 0;
        pattrib->ack_policy = 0;
        /* parsing QC field */
        if (pattrib->qos == 1) {
                pattrib->priority = GetPriority((ptr + 24));
                pattrib->ack_policy = GetAckpolicy((ptr + 24));
                pattrib->amsdu = GetAMsdu((ptr + 24));
                pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;

                if (pattrib->priority != 0 && pattrib->priority != 3)
                        adapter->recvpriv.bIsAnyNonBEPkts = true;

        } else {
                pattrib->priority = 0;
                pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
        }


        if (pattrib->order)/* HT-CTRL 11n */
                pattrib->hdrlen += 4;

        precv_frame->u.hdr.preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];

        /*  decache, drop duplicate recv packets */
        if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
                ret = _FAIL;
                goto exit;
        }

        if (pattrib->privacy) {
                GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));

                SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
        } else {
                pattrib->encrypt = 0;
                pattrib->iv_len = pattrib->icv_len = 0;
        }

exit:
        return ret;
}

static signed int validate_80211w_mgmt(struct adapter *adapter, union recv_frame *precv_frame)
{
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
        u8 *ptr = precv_frame->u.hdr.rx_data;
        u8 subtype;

        subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */

        /* only support station mode */
        if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && check_fwstate(pmlmepriv, _FW_LINKED) &&
            adapter->securitypriv.binstallBIPkey == true) {
                /* unicast management frame decrypt */
                if (pattrib->privacy && !(IS_MCAST(GetAddr1Ptr(ptr))) &&
                        (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC || subtype == WIFI_ACTION)) {
                        u8 *mgmt_DATA;
                        u32 data_len = 0;

                        pattrib->bdecrypted = 0;
                        pattrib->encrypt = _AES_;
                        pattrib->hdrlen = sizeof(struct ieee80211_hdr_3addr);
                        /* set iv and icv length */
                        SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
                        memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
                        memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
                        /* actual management data frame body */
                        data_len = pattrib->pkt_len - pattrib->hdrlen - pattrib->iv_len - pattrib->icv_len;
                        mgmt_DATA = rtw_zmalloc(data_len);
                        if (!mgmt_DATA) {
                                goto validate_80211w_fail;
                        }
                        precv_frame = decryptor(adapter, precv_frame);
                        /* save actual management data frame body */
                        memcpy(mgmt_DATA, ptr+pattrib->hdrlen+pattrib->iv_len, data_len);
                        /* overwrite the iv field */
                        memcpy(ptr+pattrib->hdrlen, mgmt_DATA, data_len);
                        /* remove the iv and icv length */
                        pattrib->pkt_len = pattrib->pkt_len - pattrib->iv_len - pattrib->icv_len;
                        kfree(mgmt_DATA);
                        if (!precv_frame) {
                                goto validate_80211w_fail;
                        }
                } else if (IS_MCAST(GetAddr1Ptr(ptr)) &&
                        (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC)) {
                        signed int BIP_ret = _SUCCESS;
                        /* verify BIP MME IE of broadcast/multicast de-auth/disassoc packet */
                        BIP_ret = rtw_BIP_verify(adapter, (u8 *)precv_frame);
                        if (BIP_ret == _FAIL) {
                                goto validate_80211w_fail;
                        } else if (BIP_ret == RTW_RX_HANDLED) {
                                /* issue sa query request */
                                issue_action_SA_Query(adapter, NULL, 0, 0);
                                goto validate_80211w_fail;
                        }
                } else { /* 802.11w protect */
                        if (subtype == WIFI_ACTION) {
                                /* according 802.11-2012 standard, these five types are not robust types */
                                if (ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_PUBLIC          &&
                                        ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_HT              &&
                                        ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_UNPROTECTED_WNM &&
                                        ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_SELF_PROTECTED  &&
                                        ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_P2P) {
                                        goto validate_80211w_fail;
                                }
                        } else if (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC) {
                                /* issue sa query request */
                                issue_action_SA_Query(adapter, NULL, 0, 0);
                                goto validate_80211w_fail;
                        }
                }
        }
        return _SUCCESS;

validate_80211w_fail:
        return _FAIL;

}

static signed int validate_recv_frame(struct adapter *adapter, union recv_frame *precv_frame)
{
        /* shall check frame subtype, to / from ds, da, bssid */

        /* then call check if rx seq/frag. duplicated. */

        u8 type;
        u8 subtype;
        signed int retval = _SUCCESS;
        u8 bDumpRxPkt;

        struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;

        u8 *ptr = precv_frame->u.hdr.rx_data;
        u8  ver = (unsigned char) (*ptr)&0x3;

        /* add version chk */
        if (ver != 0) {
                retval = _FAIL;
                goto exit;
        }

        type =  GetFrameType(ptr);
        subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */

        pattrib->to_fr_ds = get_tofr_ds(ptr);

        pattrib->frag_num = GetFragNum(ptr);
        pattrib->seq_num = GetSequence(ptr);

        pattrib->pw_save = GetPwrMgt(ptr);
        pattrib->mfrag = GetMFrag(ptr);
        pattrib->mdata = GetMData(ptr);
        pattrib->privacy = GetPrivacy(ptr);
        pattrib->order = GetOrder(ptr);
        rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));

        switch (type) {
        case WIFI_MGT_TYPE: /* mgnt */
                if (validate_80211w_mgmt(adapter, precv_frame) == _FAIL) {
                        retval = _FAIL;
                        break;
                }

                retval = validate_recv_mgnt_frame(adapter, precv_frame);
                retval = _FAIL; /*  only data frame return _SUCCESS */
                break;
        case WIFI_CTRL_TYPE: /* ctrl */
                retval = validate_recv_ctrl_frame(adapter, precv_frame);
                retval = _FAIL; /*  only data frame return _SUCCESS */
                break;
        case WIFI_DATA_TYPE: /* data */
                pattrib->qos = (subtype & BIT(7)) ? 1:0;
                retval = validate_recv_data_frame(adapter, precv_frame);
                if (retval == _FAIL) {
                        struct recv_priv *precvpriv = &adapter->recvpriv;
                        precvpriv->rx_drop++;
                } else if (retval == _SUCCESS) {
#ifdef DBG_RX_DUMP_EAP
                        u8 bDumpRxPkt;
                        u16 eth_type;

                        /*  dump eapol */
                        rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
                        /*  get ether_type */
                        memcpy(&eth_type, ptr + pattrib->hdrlen + pattrib->iv_len + LLC_HEADER_LENGTH, 2);
                        eth_type = ntohs((unsigned short) eth_type);
#endif
                }
                break;
        default:
                retval = _FAIL;
                break;
        }

exit:
        return retval;
}

/* remove the wlanhdr and add the eth_hdr */
static signed int wlanhdr_to_ethhdr(union recv_frame *precvframe)
{
        signed int      rmv_len;
        u16 eth_type, len;
        u8 bsnaphdr;
        u8 *psnap_type;
        struct ieee80211_snap_hdr       *psnap;
        __be16 be_tmp;
        struct adapter                  *adapter = precvframe->u.hdr.adapter;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        u8 *ptr = get_recvframe_data(precvframe) ; /*  point to frame_ctrl field */
        struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;

        if (pattrib->encrypt)
                recvframe_pull_tail(precvframe, pattrib->icv_len);

        psnap = (struct ieee80211_snap_hdr      *)(ptr+pattrib->hdrlen + pattrib->iv_len);
        psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
        /* convert hdr + possible LLC headers into Ethernet header */
        /* eth_type = (psnap_type[0] << 8) | psnap_type[1]; */
        if ((!memcmp(psnap, rfc1042_header, SNAP_SIZE) &&
                (memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2)) &&
                (memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2))) ||
                /* eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || */
                 !memcmp(psnap, bridge_tunnel_header, SNAP_SIZE)) {
                /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
                bsnaphdr = true;
        } else
                /* Leave Ethernet header part of hdr and full payload */
                bsnaphdr = false;

        rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr?SNAP_SIZE:0);
        len = precvframe->u.hdr.len - rmv_len;

        memcpy(&be_tmp, ptr+rmv_len, 2);
        eth_type = ntohs(be_tmp); /* pattrib->ether_type */
        pattrib->eth_type = eth_type;

        if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) {
                ptr += rmv_len;
                *ptr = 0x87;
                *(ptr+1) = 0x12;

                eth_type = 0x8712;
                /*  append rx status for mp test packets */
                ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
                memcpy(ptr, get_rxmem(precvframe), 24);
                ptr += 24;
        } else
                ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr?2:0)));

        memcpy(ptr, pattrib->dst, ETH_ALEN);
        memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);

        if (!bsnaphdr) {
                be_tmp = htons(len);
                memcpy(ptr+12, &be_tmp, 2);
        }

        return _SUCCESS;
}

static int amsdu_to_msdu(struct adapter *padapter, union recv_frame *prframe)
{
        int     a_len, padding_len;
        u16 nSubframe_Length;
        u8 nr_subframes, i;
        u8 *pdata;
        struct sk_buff *sub_pkt, *subframes[MAX_SUBFRAME_COUNT];
        struct recv_priv *precvpriv = &padapter->recvpriv;
        struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);

        nr_subframes = 0;

        recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);

        if (prframe->u.hdr.attrib.iv_len > 0)
                recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);

        a_len = prframe->u.hdr.len;

        pdata = prframe->u.hdr.rx_data;

        while (a_len > ETH_HLEN) {

                /* Offset 12 denote 2 mac address */
                nSubframe_Length = get_unaligned_be16(pdata + 12);

                if (a_len < ETH_HLEN + nSubframe_Length)
                        break;

                sub_pkt = rtw_os_alloc_msdu_pkt(prframe, nSubframe_Length, pdata);
                if (!sub_pkt)
                        break;

                /* move the data point to data content */
                pdata += ETH_HLEN;
                a_len -= ETH_HLEN;

                subframes[nr_subframes++] = sub_pkt;

                if (nr_subframes >= MAX_SUBFRAME_COUNT)
                        break;

                pdata += nSubframe_Length;
                a_len -= nSubframe_Length;
                if (a_len != 0) {
                        padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
                        if (padding_len == 4)
                                padding_len = 0;

                        if (a_len < padding_len)
                                break;

                        pdata += padding_len;
                        a_len -= padding_len;
                }
        }

        for (i = 0; i < nr_subframes; i++) {
                sub_pkt = subframes[i];

                /* Indicate the packets to upper layer */
                if (sub_pkt)
                        rtw_os_recv_indicate_pkt(padapter, sub_pkt, &prframe->u.hdr.attrib);
        }

        prframe->u.hdr.len = 0;
        rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */

        return  _SUCCESS;
}

static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
{
        struct adapter *padapter = preorder_ctrl->padapter;
        struct dvobj_priv *psdpriv = padapter->dvobj;
        struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;
        u8 wsize = preorder_ctrl->wsize_b;
        u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */

        /*  Rx Reorder initialize condition. */
        if (preorder_ctrl->indicate_seq == 0xFFFF) {
                preorder_ctrl->indicate_seq = seq_num;
        }

        /*  Drop out the packet which SeqNum is smaller than WinStart */
        if (SN_LESS(seq_num, preorder_ctrl->indicate_seq)) {
                return false;
        }

        /*  */
        /*  Sliding window manipulation. Conditions includes: */
        /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
        /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
        /*  */
        if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
                preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;

        } else if (SN_LESS(wend, seq_num)) {
                /*  boundary situation, when seq_num cross 0xFFF */
                if (seq_num >= (wsize - 1))
                        preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
                else
                        preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
                pdbgpriv->dbg_rx_ampdu_window_shift_cnt++;
        }

        return true;
}

static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl, union recv_frame *prframe)
{
        struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
        struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
        struct list_head        *phead, *plist;
        union recv_frame *pnextrframe;
        struct rx_pkt_attrib *pnextattrib;

        /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
        /* spin_lock(&ppending_recvframe_queue->lock); */


        phead = get_list_head(ppending_recvframe_queue);
        plist = get_next(phead);

        while (phead != plist) {
                pnextrframe = (union recv_frame *)plist;
                pnextattrib = &pnextrframe->u.hdr.attrib;

                if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
                        plist = get_next(plist);
                else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
                        /* Duplicate entry is found!! Do not insert current entry. */
                        /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
                        return false;
                else
                        break;

        }


        /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
        /* spin_lock(&ppending_recvframe_queue->lock); */

        list_del_init(&(prframe->u.hdr.list));

        list_add_tail(&(prframe->u.hdr.list), plist);

        /* spin_unlock(&ppending_recvframe_queue->lock); */
        /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */

        return true;

}

static void recv_indicatepkts_pkt_loss_cnt(struct debug_priv *pdbgpriv, u64 prev_seq, u64 current_seq)
{
        if (current_seq < prev_seq)
                pdbgpriv->dbg_rx_ampdu_loss_count += (4096 + current_seq - prev_seq);
        else
                pdbgpriv->dbg_rx_ampdu_loss_count += (current_seq - prev_seq);

}

static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
{
        struct list_head        *phead, *plist;
        union recv_frame *prframe;
        struct rx_pkt_attrib *pattrib;
        /* u8 index = 0; */
        int bPktInBuf = false;
        struct recv_priv *precvpriv = &padapter->recvpriv;
        struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
        struct dvobj_priv *psdpriv = padapter->dvobj;
        struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;

        /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
        /* spin_lock(&ppending_recvframe_queue->lock); */

        phead =         get_list_head(ppending_recvframe_queue);
        plist = get_next(phead);

        /*  Handling some condition for forced indicate case. */
        if (bforced == true) {
                pdbgpriv->dbg_rx_ampdu_forced_indicate_count++;
                if (list_empty(phead)) {
                        /*  spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
                        /* spin_unlock(&ppending_recvframe_queue->lock); */
                        return true;
                }

                prframe = (union recv_frame *)plist;
                pattrib = &prframe->u.hdr.attrib;

                recv_indicatepkts_pkt_loss_cnt(pdbgpriv, preorder_ctrl->indicate_seq, pattrib->seq_num);
                preorder_ctrl->indicate_seq = pattrib->seq_num;

        }

        /*  Prepare indication list and indication. */
        /*  Check if there is any packet need indicate. */
        while (!list_empty(phead)) {

                prframe = (union recv_frame *)plist;
                pattrib = &prframe->u.hdr.attrib;

                if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
                        plist = get_next(plist);
                        list_del_init(&(prframe->u.hdr.list));

                        if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
                                preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;

                        /* Set this as a lock to make sure that only one thread is indicating packet. */
                        /* pTS->RxIndicateState = RXTS_INDICATE_PROCESSING; */

                        /*  Indicate packets */

                        /* indicate this recv_frame */
                        if (!pattrib->amsdu) {
                                if ((padapter->bDriverStopped == false) &&
                                    (padapter->bSurpriseRemoved == false))
                                        rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */

                        } else if (pattrib->amsdu == 1) {
                                if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
                                        rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);

                        } else {
                                /* error condition; */
                        }


                        /* Update local variables. */
                        bPktInBuf = false;

                } else {
                        bPktInBuf = true;
                        break;
                }

        }

        /* spin_unlock(&ppending_recvframe_queue->lock); */
        /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */

        return bPktInBuf;
}

static int recv_indicatepkt_reorder(struct adapter *padapter, union recv_frame *prframe)
{
        int retval = _SUCCESS;
        struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
        struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
        struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
        struct dvobj_priv *psdpriv = padapter->dvobj;
        struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;

        if (!pattrib->amsdu) {
                /* s1. */
                wlanhdr_to_ethhdr(prframe);

                if (pattrib->qos != 1) {
                        if ((padapter->bDriverStopped == false) &&
                            (padapter->bSurpriseRemoved == false)) {
                                rtw_recv_indicatepkt(padapter, prframe);
                                return _SUCCESS;

                        }

                        return _FAIL;

                }

                if (preorder_ctrl->enable == false) {
                        /* indicate this recv_frame */
                        preorder_ctrl->indicate_seq = pattrib->seq_num;

                        rtw_recv_indicatepkt(padapter, prframe);

                        preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;

                        return _SUCCESS;
                }
        } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
                if (preorder_ctrl->enable == false) {
                        preorder_ctrl->indicate_seq = pattrib->seq_num;

                        retval = amsdu_to_msdu(padapter, prframe);

                        preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;

                        if (retval != _SUCCESS) {
                        }

                        return retval;
                }
        }

        spin_lock_bh(&ppending_recvframe_queue->lock);

        /* s2. check if winstart_b(indicate_seq) needs to been updated */
        if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
                pdbgpriv->dbg_rx_ampdu_drop_count++;
                goto _err_exit;
        }


        /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
        if (!enqueue_reorder_recvframe(preorder_ctrl, prframe)) {
                /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
                /* return _FAIL; */
                goto _err_exit;
        }


        /* s4. */
        /*  Indication process. */
        /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
        /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
        /*  */
        /*  For Rx Reorder condition: */
        /*  1. All packets with SeqNum smaller than WinStart => Indicate */
        /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
        /*  */

        /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
        if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false) == true) {
                _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
                spin_unlock_bh(&ppending_recvframe_queue->lock);
        } else {
                spin_unlock_bh(&ppending_recvframe_queue->lock);
                del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
        }

        return _SUCCESS;

_err_exit:
        spin_unlock_bh(&ppending_recvframe_queue->lock);

        return _FAIL;
}


void rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
{
        struct recv_reorder_ctrl *preorder_ctrl =
                from_timer(preorder_ctrl, t, reordering_ctrl_timer);
        struct adapter *padapter = preorder_ctrl->padapter;
        struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;


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

        spin_lock_bh(&ppending_recvframe_queue->lock);

        if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
                _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);

        spin_unlock_bh(&ppending_recvframe_queue->lock);

}

static int process_recv_indicatepkts(struct adapter *padapter, union recv_frame *prframe)
{
        int retval = _SUCCESS;
        /* struct recv_priv *precvpriv = &padapter->recvpriv; */
        /* struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; */
        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
        struct ht_priv *phtpriv = &pmlmepriv->htpriv;

        if (phtpriv->ht_option == true) { /* B/G/N Mode */
                /* prframe->u.hdr.preorder_ctrl = &precvpriv->recvreorder_ctrl[pattrib->priority]; */

                if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) { /*  including perform A-MPDU Rx Ordering Buffer Control */

                        if ((padapter->bDriverStopped == false) &&
                            (padapter->bSurpriseRemoved == false)) {
                                retval = _FAIL;
                                return retval;
                        }
                }
        } else { /* B/G mode */
                retval = wlanhdr_to_ethhdr(prframe);
                if (retval != _SUCCESS)
                        return retval;

                if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) {
                        /* indicate this recv_frame */
                        rtw_recv_indicatepkt(padapter, prframe);
                } else {
                        retval = _FAIL;
                        return retval;
                }

        }

        return retval;

}

static int recv_func_prehandle(struct adapter *padapter, union recv_frame *rframe)
{
        int ret = _SUCCESS;
        struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;

        /* check the frame crtl field and decache */
        ret = validate_recv_frame(padapter, rframe);
        if (ret != _SUCCESS) {
                rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
                goto exit;
        }

exit:
        return ret;
}

static int recv_func_posthandle(struct adapter *padapter, union recv_frame *prframe)
{
        int ret = _SUCCESS;
        union recv_frame *orig_prframe = prframe;
        struct recv_priv *precvpriv = &padapter->recvpriv;
        struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;

        prframe = decryptor(padapter, prframe);
        if (!prframe) {
                ret = _FAIL;
                goto _recv_data_drop;
        }

        prframe = recvframe_chk_defrag(padapter, prframe);
        if (!prframe)
                goto _recv_data_drop;

        prframe = portctrl(padapter, prframe);
        if (!prframe) {

                ret = _FAIL;
                goto _recv_data_drop;
        }

        count_rx_stats(padapter, prframe, NULL);

        ret = process_recv_indicatepkts(padapter, prframe);
        if (ret != _SUCCESS) {
                rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
                goto _recv_data_drop;
        }

_recv_data_drop:
        precvpriv->rx_drop++;
        return ret;
}

static int recv_func(struct adapter *padapter, union recv_frame *rframe)
{
        int ret;
        struct rx_pkt_attrib *prxattrib = &rframe->u.hdr.attrib;
        struct recv_priv *recvpriv = &padapter->recvpriv;
        struct security_priv *psecuritypriv = &padapter->securitypriv;
        struct mlme_priv *mlmepriv = &padapter->mlmepriv;

        /* check if need to handle uc_swdec_pending_queue*/
        if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
                union recv_frame *pending_frame;
                int cnt = 0;

                while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
                        cnt++;
                        recv_func_posthandle(padapter, pending_frame);
                }
        }

        ret = recv_func_prehandle(padapter, rframe);

        if (ret == _SUCCESS) {

                /* check if need to enqueue into uc_swdec_pending_queue*/
                if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
                        !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
                        (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt == true) &&
                        psecuritypriv->ndisauthtype == Ndis802_11AuthModeWPAPSK &&
                        !psecuritypriv->busetkipkey) {
                        rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);

                        if (recvpriv->free_recvframe_cnt < NR_RECVFRAME/4) {
                                /* to prevent from recvframe starvation, get recvframe from uc_swdec_pending_queue to free_recvframe_cnt  */
                                rframe = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue);
                                if (rframe)
                                        goto do_posthandle;
                        }
                        goto exit;
                }

do_posthandle:
                ret = recv_func_posthandle(padapter, rframe);
        }

exit:
        return ret;
}


s32 rtw_recv_entry(union recv_frame *precvframe)
{
        struct adapter *padapter;
        struct recv_priv *precvpriv;
        s32 ret = _SUCCESS;

        padapter = precvframe->u.hdr.adapter;

        precvpriv = &padapter->recvpriv;

        ret = recv_func(padapter, precvframe);
        if (ret == _FAIL) {
                goto _recv_entry_drop;
        }


        precvpriv->rx_pkts++;

        return ret;

_recv_entry_drop:

        return ret;
}

static void rtw_signal_stat_timer_hdl(struct timer_list *t)
{
        struct adapter *adapter =
                from_timer(adapter, t, recvpriv.signal_stat_timer);
        struct recv_priv *recvpriv = &adapter->recvpriv;

        u32 tmp_s, tmp_q;
        u8 avg_signal_strength = 0;
        u8 avg_signal_qual = 0;
        u32 num_signal_strength = 0;
        u32 __maybe_unused num_signal_qual = 0;
        u8 _alpha = 5; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */

        if (adapter->recvpriv.is_signal_dbg) {
                /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
                adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
                adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
        } else {

                if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
                        avg_signal_strength = recvpriv->signal_strength_data.avg_val;
                        num_signal_strength = recvpriv->signal_strength_data.total_num;
                        /*  after avg_vals are acquired, we can re-stat the signal values */
                        recvpriv->signal_strength_data.update_req = 1;
                }

                if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
                        avg_signal_qual = recvpriv->signal_qual_data.avg_val;
                        num_signal_qual = recvpriv->signal_qual_data.total_num;
                        /*  after avg_vals are acquired, we can re-stat the signal values */
                        recvpriv->signal_qual_data.update_req = 1;
                }

                if (num_signal_strength == 0) {
                        if (rtw_get_on_cur_ch_time(adapter) == 0 ||
                            jiffies_to_msecs(jiffies - rtw_get_on_cur_ch_time(adapter)) < 2 * adapter->mlmeextpriv.mlmext_info.bcn_interval
                        ) {
                                goto set_timer;
                        }
                }

                if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == true ||
                    check_fwstate(&adapter->mlmepriv, _FW_LINKED) == false
                ) {
                        goto set_timer;
                }

                /* update value of signal_strength, rssi, signal_qual */
                tmp_s = (avg_signal_strength+(_alpha-1)*recvpriv->signal_strength);
                if (tmp_s % _alpha)
                        tmp_s = tmp_s/_alpha + 1;
                else
                        tmp_s = tmp_s/_alpha;
                if (tmp_s > 100)
                        tmp_s = 100;

                tmp_q = (avg_signal_qual+(_alpha-1)*recvpriv->signal_qual);
                if (tmp_q % _alpha)
                        tmp_q = tmp_q/_alpha + 1;
                else
                        tmp_q = tmp_q/_alpha;
                if (tmp_q > 100)
                        tmp_q = 100;

                recvpriv->signal_strength = tmp_s;
                recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
                recvpriv->signal_qual = tmp_q;
        }

set_timer:
        rtw_set_signal_stat_timer(recvpriv);

}