/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 ******************************************************************************/
#define _RTW_RECV_C_
#include <osdep_service.h>
#include <drv_types.h>
#include <recv_osdep.h>
#include <mlme_osdep.h>
#include <linux/ip.h>
#include <linux/if_ether.h>
#include <usb_ops.h>
#include <linux/ieee80211.h>
#include <wifi.h>
#include <rtl8723a_recv.h>
#include <rtl8723a_xmit.h>

void rtw_signal_stat_timer_hdl23a(unsigned long data);

void _rtw_init_sta_recv_priv23a(struct sta_recv_priv *psta_recvpriv)
{



        spin_lock_init(&psta_recvpriv->lock);

        /* for (i = 0; i<MAX_RX_NUMBLKS; i++) */
        /*      _rtw_init_queue23a(&psta_recvpriv->blk_strms[i]); */

        _rtw_init_queue23a(&psta_recvpriv->defrag_q);


}

int _rtw_init_recv_priv23a(struct recv_priv *precvpriv,
                        struct rtw_adapter *padapter)
{
        struct recv_frame *precvframe;
        int i;
        int res = _SUCCESS;

        spin_lock_init(&precvpriv->lock);

        _rtw_init_queue23a(&precvpriv->free_recv_queue);
        _rtw_init_queue23a(&precvpriv->recv_pending_queue);
        _rtw_init_queue23a(&precvpriv->uc_swdec_pending_queue);

        precvpriv->adapter = padapter;

        for (i = 0; i < NR_RECVFRAME ; i++) {
                precvframe = kzalloc(sizeof(struct recv_frame), GFP_KERNEL);
                if (!precvframe)
                        break;
                INIT_LIST_HEAD(&precvframe->list);

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

                precvframe->adapter = padapter;
                precvframe++;
        }

        precvpriv->free_recvframe_cnt = i;
        precvpriv->rx_pending_cnt = 1;

        res = rtl8723au_init_recv_priv(padapter);

        setup_timer(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl23a,
                    (unsigned long)padapter);

        precvpriv->signal_stat_sampling_interval = 1000; /* ms */

        rtw_set_signal_stat_timer(precvpriv);

        return res;
}

void _rtw_free_recv_priv23a (struct recv_priv *precvpriv)
{
        struct rtw_adapter *padapter = precvpriv->adapter;
        struct recv_frame *precvframe;
        struct list_head *plist, *ptmp;

        rtw_free_uc_swdec_pending_queue23a(padapter);

        list_for_each_safe(plist, ptmp, &precvpriv->free_recv_queue.queue) {
                precvframe = container_of(plist, struct recv_frame, list);
                list_del_init(&precvframe->list);
                kfree(precvframe);
        }

        rtl8723au_free_recv_priv(padapter);
}

struct recv_frame *rtw_alloc_recvframe23a(struct rtw_queue *pfree_recv_queue)
{
        struct recv_frame *pframe;
        struct list_head *plist, *phead;
        struct rtw_adapter *padapter;
        struct recv_priv *precvpriv;

        spin_lock_bh(&pfree_recv_queue->lock);

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

                plist = phead->next;

                pframe = container_of(plist, struct recv_frame, list);

                list_del_init(&pframe->list);
                padapter = pframe->adapter;
                if (padapter) {
                        precvpriv = &padapter->recvpriv;
                        if (pfree_recv_queue == &precvpriv->free_recv_queue)
                                precvpriv->free_recvframe_cnt--;
                }
        }

        spin_unlock_bh(&pfree_recv_queue->lock);

        return pframe;
}

int rtw_free_recvframe23a(struct recv_frame *precvframe)
{
        struct rtw_adapter *padapter = precvframe->adapter;
        struct recv_priv *precvpriv = &padapter->recvpriv;
        struct rtw_queue *pfree_recv_queue;

        if (precvframe->pkt) {
                dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
                precvframe->pkt = NULL;
        }

        pfree_recv_queue = &precvpriv->free_recv_queue;
        spin_lock_bh(&pfree_recv_queue->lock);

        list_del_init(&precvframe->list);

        list_add_tail(&precvframe->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;
}

int rtw_enqueue_recvframe23a(struct recv_frame *precvframe, struct rtw_queue *queue)
{
        struct rtw_adapter *padapter = precvframe->adapter;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        spin_lock_bh(&queue->lock);

        list_del_init(&precvframe->list);

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

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

        spin_unlock_bh(&queue->lock);

        return _SUCCESS;
}

/*
caller : defrag ; recvframe_chk_defrag23a in recv_thread  (passive)
pframequeue: defrag_queue : will be accessed in recv_thread  (passive)

using spinlock to protect

*/

static void rtw_free_recvframe23a_queue(struct rtw_queue *pframequeue)
{
        struct recv_frame *hdr;
        struct list_head *plist, *phead, *ptmp;

        spin_lock(&pframequeue->lock);

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

        list_for_each_safe(plist, ptmp, phead) {
                hdr = container_of(plist, struct recv_frame, list);
                rtw_free_recvframe23a(hdr);
        }

        spin_unlock(&pframequeue->lock);
}

u32 rtw_free_uc_swdec_pending_queue23a(struct rtw_adapter *adapter)
{
        u32 cnt = 0;
        struct recv_frame *pending_frame;

        while ((pending_frame = rtw_alloc_recvframe23a(&adapter->recvpriv.uc_swdec_pending_queue))) {
                rtw_free_recvframe23a(pending_frame);
                DBG_8723A("%s: dequeue uc_swdec_pending_queue\n", __func__);
                cnt++;
        }

        return cnt;
}

int rtw_enqueue_recvbuf23a_to_head(struct recv_buf *precvbuf, struct rtw_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;
}

int rtw_enqueue_recvbuf23a(struct recv_buf *precvbuf, struct rtw_queue *queue)
{
        unsigned long irqL;

        spin_lock_irqsave(&queue->lock, irqL);

        list_del_init(&precvbuf->list);

        list_add_tail(&precvbuf->list, get_list_head(queue));
        spin_unlock_irqrestore(&queue->lock, irqL);
        return _SUCCESS;
}

struct recv_buf *rtw_dequeue_recvbuf23a (struct rtw_queue *queue)
{
        unsigned long irqL;
        struct recv_buf *precvbuf;
        struct list_head *plist, *phead;

        spin_lock_irqsave(&queue->lock, irqL);

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

                plist = phead->next;

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

                list_del_init(&precvbuf->list);
        }

        spin_unlock_irqrestore(&queue->lock, irqL);

        return precvbuf;
}

int recvframe_chkmic(struct rtw_adapter *adapter,
                     struct recv_frame *precvframe);
int recvframe_chkmic(struct rtw_adapter *adapter,
                     struct recv_frame *precvframe) {

        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->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_stainfo23a(&adapter->stapriv, &prxattrib->ta[0]);

        if (prxattrib->encrypt == WLAN_CIPHER_SUITE_TKIP) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "recvframe_chkmic:prxattrib->encrypt == WLAN_CIPHER_SUITE_TKIP\n");
                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "recvframe_chkmic:da = %pM\n", prxattrib->ra);

                /* calculate mic code */
                if (stainfo != NULL) {
                        if (is_multicast_ether_addr(prxattrib->ra)) {
                                mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];

                                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                         "recvframe_chkmic: bcmc key\n");

                                if (!psecuritypriv->binstallGrpkey) {
                                        res = _FAIL;
                                        RT_TRACE(_module_rtl871x_recv_c_,
                                                 _drv_err_,
                                                 "recvframe_chkmic:didn't install group key!\n");
                                        DBG_8723A("\n recvframe_chkmic:didn't "
                                                  "install group key!!!!!!\n");
                                        goto exit;
                                }
                        } else {
                                mickey = &stainfo->dot11tkiprxmickey.skey[0];
                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "recvframe_chkmic: unicast key\n");
                        }

                        /* icv_len included the mic code */
                        datalen = precvframe->pkt->len-prxattrib->
                                hdrlen-prxattrib->iv_len-prxattrib->icv_len - 8;
                        pframe = precvframe->pkt->data;
                        payload = pframe + prxattrib->hdrlen +
                                prxattrib->iv_len;

                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "prxattrib->iv_len =%d prxattrib->icv_len =%d\n",
                                 prxattrib->iv_len, prxattrib->icv_len);

                        /* care the length of the data */
                        rtw_seccalctkipmic23a(mickey, pframe, payload,
                                           datalen, &miccode[0],
                                           (unsigned char)prxattrib->priority);

                        pframemic = payload + datalen;

                        bmic_err = false;

                        for (i = 0; i < 8; i++) {
                                if (miccode[i] != *(pframemic + i)) {
                                        RT_TRACE(_module_rtl871x_recv_c_,
                                                 _drv_err_,
                                                 "recvframe_chkmic:miccode[%d](%02x) != *(pframemic+%d)(%02x)\n",
                                                 i, miccode[i],
                                                 i, *(pframemic + i));
                                        bmic_err = true;
                                }
                        }

                        if (bmic_err == true) {
                                int i;

                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "*(pframemic-8)-*(pframemic-1) =0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
                                         *(pframemic - 8), *(pframemic - 7),
                                         *(pframemic - 6), *(pframemic - 5),
                                         *(pframemic - 4), *(pframemic - 3),
                                         *(pframemic - 2), *(pframemic - 1));
                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "*(pframemic-16)-*(pframemic-9) =0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
                                         *(pframemic - 16), *(pframemic - 15),
                                         *(pframemic - 14), *(pframemic - 13),
                                         *(pframemic - 12), *(pframemic - 11),
                                         *(pframemic - 10), *(pframemic - 9));

                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "====== demp packet (len =%d) ======\n",
                                         precvframe->pkt->len);
                                for (i = 0; i < precvframe->pkt->len; i = i + 8) {
                                        RT_TRACE(_module_rtl871x_recv_c_,
                                                 _drv_err_,
                                                 "0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
                                                 *(precvframe->pkt->data+i),
                                                 *(precvframe->pkt->data+i+1),
                                                 *(precvframe->pkt->data+i+2),
                                                 *(precvframe->pkt->data+i+3),
                                                 *(precvframe->pkt->data+i+4),
                                                 *(precvframe->pkt->data+i+5),
                                                 *(precvframe->pkt->data+i+6),
                                                 *(precvframe->pkt->data+i+7));
                                }
                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "====== demp packet end [len =%d]======\n",
                                         precvframe->pkt->len);
                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "hrdlen =%d\n", prxattrib->hdrlen);

                                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                         "ra = %pM psecuritypriv->binstallGrpkey =%d\n",
                                         prxattrib->ra,
                                         psecuritypriv->binstallGrpkey);

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

                                if ((prxattrib->bdecrypted == true) &&
                                    (brpt_micerror == true)) {
                                        rtw_handle_tkip_mic_err23a(adapter, (u8)is_multicast_ether_addr(prxattrib->ra));
                                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                                 "mic error :prxattrib->bdecrypted =%d\n",
                                                 prxattrib->bdecrypted);
                                        DBG_8723A(" mic error :prxattrib->"
                                                  "bdecrypted =%d\n",
                                                  prxattrib->bdecrypted);
                                } else {
                                        RT_TRACE(_module_rtl871x_recv_c_,
                                                 _drv_err_,
                                                 "mic error :prxattrib->bdecrypted =%d\n",
                                                 prxattrib->bdecrypted);
                                        DBG_8723A(" mic error :prxattrib->"
                                                  "bdecrypted =%d\n",
                                                  prxattrib->bdecrypted);
                                }

                                res = _FAIL;
                        } else {
                                /* mic checked ok */
                                if (!psecuritypriv->bcheck_grpkey &&
                                    is_multicast_ether_addr(prxattrib->ra)) {
                                        psecuritypriv->bcheck_grpkey = 1;
                                        RT_TRACE(_module_rtl871x_recv_c_,
                                                 _drv_err_,
                                                 "psecuritypriv->bcheck_grpkey = true\n");
                                }
                        }
                } else {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "recvframe_chkmic: rtw_get_stainfo23a ==NULL!!!\n");
                }

                skb_trim(precvframe->pkt, precvframe->pkt->len - 8);
        }

exit:



        return res;
}

/* decrypt and set the ivlen, icvlen of the recv_frame */
struct recv_frame *decryptor(struct rtw_adapter *padapter,
                             struct recv_frame *precv_frame);
struct recv_frame *decryptor(struct rtw_adapter *padapter,
                             struct recv_frame *precv_frame)
{
        struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
        struct security_priv *psecuritypriv = &padapter->securitypriv;
        struct recv_frame *return_packet = precv_frame;
        int res = _SUCCESS;

        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                 "prxstat->decrypted =%x prxattrib->encrypt = 0x%03x\n",
                 prxattrib->bdecrypted, prxattrib->encrypt);

        if (prxattrib->encrypt > 0) {
                u8 *iv = precv_frame->pkt->data + prxattrib->hdrlen;

                prxattrib->key_index = (((iv[3]) >> 6) & 0x3);

                if (prxattrib->key_index > WEP_KEYS) {
                        DBG_8723A("prxattrib->key_index(%d) > WEP_KEYS\n",
                                  prxattrib->key_index);

                        switch (prxattrib->encrypt) {
                        case WLAN_CIPHER_SUITE_WEP40:
                        case WLAN_CIPHER_SUITE_WEP104:
                                prxattrib->key_index =
                                        psecuritypriv->dot11PrivacyKeyIndex;
                                break;
                        case WLAN_CIPHER_SUITE_TKIP:
                        case WLAN_CIPHER_SUITE_CCMP:
                        default:
                                prxattrib->key_index =
                                        psecuritypriv->dot118021XGrpKeyid;
                                break;
                        }
                }
        }

        if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0))) {
                psecuritypriv->hw_decrypted = 0;
                switch (prxattrib->encrypt) {
                case WLAN_CIPHER_SUITE_WEP40:
                case WLAN_CIPHER_SUITE_WEP104:
                        rtw_wep_decrypt23a(padapter, precv_frame);
                        break;
                case WLAN_CIPHER_SUITE_TKIP:
                        res = rtw_tkip_decrypt23a(padapter, precv_frame);
                        break;
                case WLAN_CIPHER_SUITE_CCMP:
                        res = rtw_aes_decrypt23a(padapter, precv_frame);
                        break;
                default:
                        break;
                }
        } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
                   (psecuritypriv->busetkipkey == 1 ||
                    prxattrib->encrypt != WLAN_CIPHER_SUITE_TKIP)) {
                        psecuritypriv->hw_decrypted = 1;
        }

        if (res == _FAIL) {
                rtw_free_recvframe23a(return_packet);
                return_packet = NULL;
        }



        return return_packet;
}

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

        pstapriv = &adapter->stapriv;

        auth_alg = adapter->securitypriv.dot11AuthAlgrthm;

        pfhdr = precv_frame;
        pattrib = &pfhdr->attrib;
        psta_addr = pattrib->ta;
        psta = rtw_get_stainfo23a(pstapriv, psta_addr);

        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                 "########portctrl:adapter->securitypriv.dot11AuthAlgrthm =%d\n",
                 adapter->securitypriv.dot11AuthAlgrthm);

        prtnframe = precv_frame;

        if (auth_alg == dot11AuthAlgrthm_8021X) {
                /* get ether_type */
                ptr = pfhdr->pkt->data + pfhdr->attrib.hdrlen;

                ether_type = (ptr[6] << 8) | ptr[7];

                if (psta && psta->ieee8021x_blocked) {
                        /* blocked */
                        /* only accept EAPOL frame */
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "########portctrl:psta->ieee8021x_blocked ==1\n");

                        if (ether_type != eapol_type) {
                                /* free this frame */
                                rtw_free_recvframe23a(precv_frame);
                                prtnframe = NULL;
                        }
                }
        }

        return prtnframe;
}

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

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



        if (tid > 15) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                         "recv_decache, (tid>15)! seq_ctrl = 0x%x, tid = 0x%x\n",
                         seq_ctrl, tid);

                return _FAIL;
        }

        if (1) { /* if (bretry) */
                if (seq_ctrl == prxcache->tid_rxseq[tid]) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                 "recv_decache, seq_ctrl = 0x%x, tid = 0x%x, tid_rxseq = 0x%x\n",
                                 seq_ctrl, tid, prxcache->tid_rxseq[tid]);

                        return _FAIL;
                }
        }

        prxcache->tid_rxseq[tid] = seq_ctrl;



        return _SUCCESS;
}

void process23a_pwrbit_data(struct rtw_adapter *padapter,
                         struct recv_frame *precv_frame);
void process23a_pwrbit_data(struct rtw_adapter *padapter,
                         struct recv_frame *precv_frame)
{
#ifdef CONFIG_8723AU_AP_MODE
        unsigned char pwrbit;
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *psta = NULL;

        psta = rtw_get_stainfo23a(pstapriv, pattrib->src);

        if (psta) {
                pwrbit = ieee80211_has_pm(hdr->frame_control);

                if (pwrbit) {
                        if (!(psta->state & WIFI_SLEEP_STATE))
                                stop_sta_xmit23a(padapter, psta);
                } else {
                        if (psta->state & WIFI_SLEEP_STATE)
                                wakeup_sta_to_xmit23a(padapter, psta);
                }
        }

#endif
}

void process_wmmps_data(struct rtw_adapter *padapter,
                        struct recv_frame *precv_frame);
void process_wmmps_data(struct rtw_adapter *padapter,
                        struct recv_frame *precv_frame)
{
#ifdef CONFIG_8723AU_AP_MODE
        struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *psta = NULL;

        psta = rtw_get_stainfo23a(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_frames23a(padapter, psta);
                        } else {
                                /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
                                issue_qos_nulldata23a(padapter, psta->hwaddr,
                                                   (u16)pattrib->priority,
                                                   0, 0);
                        }
                }
        }

#endif
}

static void count_rx_stats(struct rtw_adapter *padapter,
                           struct 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->attrib;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        sz = prframe->pkt->len;
        precvpriv->rx_bytes += sz;

        padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;

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

        if (sta)
                psta = sta;
        else
                psta = prframe->psta;

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

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

static int sta2sta_data_frame(struct rtw_adapter *adapter,
                              struct recv_frame *precv_frame,
                              struct sta_info**psta)
{
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        int ret = _SUCCESS;
        struct rx_pkt_attrib *pattrib = & precv_frame->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;
        int bmcast = is_multicast_ether_addr(pattrib->dst);



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

                /*  filter packets that SA is myself or multicast or broadcast */
                if (ether_addr_equal(myhwaddr, pattrib->src)) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "SA == myself\n");
                        ret = _FAIL;
                        goto exit;
                }

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

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

                sta_addr = pattrib->src;
        } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
                /*  For Station mode, sa and bssid should always be BSSID,
                    and DA is my mac-address */
                if (!ether_addr_equal(pattrib->bssid, pattrib->src)) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "bssid != TA under STATION_MODE; drop pkt\n");
                        ret = _FAIL;
                        goto exit;
                }

                sta_addr = pattrib->bssid;

        } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
                if (bmcast) {
                        /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
                        if (!is_multicast_ether_addr(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 (!ether_addr_equal(pattrib->bssid, pattrib->dst)) {
                                ret = _FAIL;
                                goto exit;
                        }

                        sta_addr = pattrib->src;
                }
        } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
                ether_addr_copy(pattrib->dst, hdr->addr1);
                ether_addr_copy(pattrib->src, hdr->addr2);
                ether_addr_copy(pattrib->bssid, hdr->addr3);
                ether_addr_copy(pattrib->ra, pattrib->dst);
                ether_addr_copy(pattrib->ta, pattrib->src);

                sta_addr = mybssid;
        } else {
                ret  = _FAIL;
        }

        if (bmcast)
                *psta = rtw_get_bcmc_stainfo23a(adapter);
        else
                *psta = rtw_get_stainfo23a(pstapriv, sta_addr); /*  get ap_info */

        if (*psta == NULL) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "can't get psta under sta2sta_data_frame ; drop pkt\n");
                ret = _FAIL;
                goto exit;
        }

exit:

        return ret;
}

int ap2sta_data_frame(struct rtw_adapter *adapter,
                      struct recv_frame *precv_frame,
                      struct sta_info **psta);
int ap2sta_data_frame(struct rtw_adapter *adapter,
                      struct recv_frame *precv_frame,
                      struct sta_info **psta)
{
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct rx_pkt_attrib *pattrib = & precv_frame->attrib;
        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);
        int bmcast = is_multicast_ether_addr(pattrib->dst);



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

                /* filter packets that SA is myself or multicast or broadcast */
                if (ether_addr_equal(myhwaddr, pattrib->src)) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "SA == myself\n");
                        ret = _FAIL;
                        goto exit;
                }

                /*  da should be for me */
                if (!ether_addr_equal(myhwaddr, pattrib->dst) && !bmcast) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "ap2sta_data_frame:  compare DA failed; DA=%pM\n",
                                 pattrib->dst);
                        ret = _FAIL;
                        goto exit;
                }

                /*  check BSSID */
                if (ether_addr_equal(pattrib->bssid, "\x0\x0\x0\x0\x0\x0") ||
                    ether_addr_equal(mybssid, "\x0\x0\x0\x0\x0\x0") ||
                    !ether_addr_equal(pattrib->bssid, mybssid)) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "ap2sta_data_frame:  compare BSSID failed; BSSID=%pM\n",
                                 pattrib->bssid);
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "mybssid=%pM\n", mybssid);

                        if (!bmcast) {
                                DBG_8723A("issue_deauth23a to the nonassociated ap=%pM for the reason(7)\n",
                                          pattrib->bssid);
                                issue_deauth23a(adapter, pattrib->bssid,
                                             WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
                        }

                        ret = _FAIL;
                        goto exit;
                }

                if (bmcast)
                        *psta = rtw_get_bcmc_stainfo23a(adapter);
                else
                        /*  get ap_info */
                        *psta = rtw_get_stainfo23a(pstapriv, pattrib->bssid);

                if (*psta == NULL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "ap2sta: can't get psta under STATION_MODE; drop pkt\n");
                        ret = _FAIL;
                        goto exit;
                }

                if (ieee80211_is_nullfunc(hdr->frame_control)) {
                        /* 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) &&
                   check_fwstate(pmlmepriv, _FW_LINKED)) {
                ether_addr_copy(pattrib->dst, hdr->addr1);
                ether_addr_copy(pattrib->src, hdr->addr2);
                ether_addr_copy(pattrib->bssid, hdr->addr3);
                ether_addr_copy(pattrib->ra, pattrib->dst);
                ether_addr_copy(pattrib->ta, pattrib->src);

                /*  */
                ether_addr_copy(pattrib->bssid,  mybssid);

                /*  get sta_info */
                *psta = rtw_get_stainfo23a(pstapriv, pattrib->bssid);
                if (*psta == NULL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "can't get psta under MP_MODE ; drop pkt\n");
                        ret = _FAIL;
                        goto exit;
                }
        } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
                /* Special case */
                ret = RTW_RX_HANDLED;
                goto exit;
        } else {
                if (ether_addr_equal(myhwaddr, pattrib->dst) && !bmcast) {
                        *psta = rtw_get_stainfo23a(pstapriv, pattrib->bssid);
                        if (*psta == NULL) {
                                DBG_8723A("issue_deauth23a to the ap=%pM for the reason(7)\n",
                                          pattrib->bssid);

                                issue_deauth23a(adapter, pattrib->bssid,
                                             WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
                        }
                }

                ret = _FAIL;
        }

exit:



        return ret;
}

int sta2ap_data_frame(struct rtw_adapter *adapter,
                      struct recv_frame *precv_frame,
                      struct sta_info **psta);
int sta2ap_data_frame(struct rtw_adapter *adapter,
                      struct recv_frame *precv_frame,
                      struct sta_info **psta)
{
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct rx_pkt_attrib *pattrib = & precv_frame->attrib;
        struct sta_priv *pstapriv = &adapter->stapriv;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
        unsigned char *mybssid = get_bssid(pmlmepriv);
        int ret = _SUCCESS;



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

                *psta = rtw_get_stainfo23a(pstapriv, pattrib->src);
                if (*psta == NULL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "can't get psta under AP_MODE; drop pkt\n");
                        DBG_8723A("issue_deauth23a to sta=%pM for the reason(7)\n",
                                  pattrib->src);

                        issue_deauth23a(adapter, pattrib->src,
                                     WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);

                        ret = RTW_RX_HANDLED;

                        goto exit;
                }

                process23a_pwrbit_data(adapter, precv_frame);

                /* We only get here if it's a data frame, so no need to
                 * confirm data frame type first */
                if (ieee80211_is_data_qos(hdr->frame_control))
                        process_wmmps_data(adapter, precv_frame);

                if (ieee80211_is_nullfunc(hdr->frame_control)) {
                        /* 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 (!ether_addr_equal(pattrib->ra, myhwaddr)) {
                        ret = RTW_RX_HANDLED;
                        goto exit;
                }
                DBG_8723A("issue_deauth23a to sta=%pM for the reason(7)\n",
                          pattrib->src);
                issue_deauth23a(adapter, pattrib->src,
                             WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
                ret = RTW_RX_HANDLED;
                goto exit;
        }

exit:



        return ret;
}

static int validate_recv_ctrl_frame(struct rtw_adapter *padapter,
                                    struct recv_frame *precv_frame)
{
#ifdef CONFIG_8723AU_AP_MODE
        struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;

        if (!ieee80211_is_ctl(hdr->frame_control))
                return _FAIL;

        /* receive the frames that ra(a1) is my address */
        if (!ether_addr_equal(hdr->addr1, myid(&padapter->eeprompriv)))
                return _FAIL;

        /* only handle ps-poll */
        if (ieee80211_is_pspoll(hdr->frame_control)) {
                struct ieee80211_pspoll *psp = (struct ieee80211_pspoll *)hdr;
                u16 aid;
                u8 wmmps_ac = 0;
                struct sta_info *psta = NULL;

                aid = le16_to_cpu(psp->aid) & 0x3fff;
                psta = rtw_get_stainfo23a(pstapriv, hdr->addr2);

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

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

                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) {
                        DBG_8723A("%s alive check-rx ps-poll\n", __func__);
                        psta->expire_to = pstapriv->expire_to;
                        psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
                }

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

                        spin_lock_bh(&pxmitpriv->lock);

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

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

                                xmitframe_plist = xmitframe_plist->next;

                                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;

                                /* DBG_8723A("handling ps-poll, q_len =%d, tim =%x\n", psta->sleepq_len, pstapriv->tim_bitmap); */

                                rtl8723au_hal_xmitframe_enqueue(padapter,
                                                                pxmitframe);

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

                                        /* DBG_8723A("after handling ps-poll, tim =%x\n", pstapriv->tim_bitmap); */

                                        /* update BCN for TIM IE */
                                        /* update_BCNTIM(padapter); */
                                        update_beacon23a(padapter, WLAN_EID_TIM,
                                                         NULL, false);
                                }

                                /* 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);

                                /* DBG_8723A("no buffered packets to xmit\n"); */
                                if (pstapriv->tim_bitmap & CHKBIT(psta->aid)) {
                                        if (psta->sleepq_len == 0) {
                                                DBG_8723A("no buffered packets "
                                                          "to xmit\n");

                                                /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
                                                issue_nulldata23a(padapter,
                                                               psta->hwaddr,
                                                               0, 0, 0);
                                        } else {
                                                DBG_8723A("error!psta->sleepq"
                                                          "_len =%d\n",
                                                          psta->sleepq_len);
                                                psta->sleepq_len = 0;
                                        }

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

                                        /* update BCN for TIM IE */
                                        /* update_BCNTIM(padapter); */
                                        update_beacon23a(padapter, WLAN_EID_TIM,
                                                         NULL, false);
                                }
                        }
                }
        }

#endif
        return _FAIL;
}

struct recv_frame *recvframe_chk_defrag23a(struct rtw_adapter *padapter,
                                        struct recv_frame *precv_frame);
static int validate_recv_mgnt_frame(struct rtw_adapter *padapter,
                                    struct recv_frame *precv_frame)
{
        struct sta_info *psta;
        struct sk_buff *skb;
        struct ieee80211_hdr *hdr;
        /* struct mlme_priv *pmlmepriv = &adapter->mlmepriv; */

        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                 "+validate_recv_mgnt_frame\n");

        precv_frame = recvframe_chk_defrag23a(padapter, precv_frame);
        if (precv_frame == NULL) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                         "%s: fragment packet\n", __func__);
                return _SUCCESS;
        }

        skb = precv_frame->pkt;
        hdr = (struct ieee80211_hdr *) skb->data;

                /* for rx pkt statistics */
        psta = rtw_get_stainfo23a(&padapter->stapriv, hdr->addr2);
        if (psta) {
                psta->sta_stats.rx_mgnt_pkts++;

                if (ieee80211_is_beacon(hdr->frame_control))
                        psta->sta_stats.rx_beacon_pkts++;
                else if (ieee80211_is_probe_req(hdr->frame_control))
                        psta->sta_stats.rx_probereq_pkts++;
                else if (ieee80211_is_probe_resp(hdr->frame_control)) {
                        if (ether_addr_equal(padapter->eeprompriv.mac_addr,
                                    hdr->addr1))
                                psta->sta_stats.rx_probersp_pkts++;
                        else if (is_broadcast_ether_addr(hdr->addr1) ||
                                 is_multicast_ether_addr(hdr->addr1))
                                psta->sta_stats.rx_probersp_bm_pkts++;
                        else
                                psta->sta_stats.rx_probersp_uo_pkts++;
                }
        }

        mgt_dispatcher23a(padapter, precv_frame);

        return _SUCCESS;
}

static int validate_recv_data_frame(struct rtw_adapter *adapter,
                                    struct recv_frame *precv_frame)
{
        u8 bretry;
        u8 *psa, *pda;
        struct sta_info *psta = NULL;
        struct rx_pkt_attrib *pattrib = & precv_frame->attrib;
        struct security_priv *psecuritypriv = &adapter->securitypriv;
        int ret = _SUCCESS;
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;



        bretry = ieee80211_has_retry(hdr->frame_control);
        pda = ieee80211_get_DA(hdr);
        psa = ieee80211_get_SA(hdr);

        ether_addr_copy(pattrib->dst, pda);
        ether_addr_copy(pattrib->src, psa);

        switch (hdr->frame_control &
                cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
        case cpu_to_le16(0):
                ether_addr_copy(pattrib->bssid, hdr->addr3);
                ether_addr_copy(pattrib->ra, pda);
                ether_addr_copy(pattrib->ta, psa);
                ret = sta2sta_data_frame(adapter, precv_frame, &psta);
                break;

        case cpu_to_le16(IEEE80211_FCTL_FROMDS):
                ether_addr_copy(pattrib->bssid, hdr->addr2);
                ether_addr_copy(pattrib->ra, pda);
                ether_addr_copy(pattrib->ta, hdr->addr2);
                ret = ap2sta_data_frame(adapter, precv_frame, &psta);
                break;

        case cpu_to_le16(IEEE80211_FCTL_TODS):
                ether_addr_copy(pattrib->bssid, hdr->addr1);
                ether_addr_copy(pattrib->ra, hdr->addr1);
                ether_addr_copy(pattrib->ta, psa);
                ret = sta2ap_data_frame(adapter, precv_frame, &psta);
                break;

        case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
                /*
                 * There is no BSSID in this case, but the driver has been
                 * using addr1 so far, so keep it for now.
                 */
                ether_addr_copy(pattrib->bssid, hdr->addr1);
                ether_addr_copy(pattrib->ra, hdr->addr1);
                ether_addr_copy(pattrib->ta, hdr->addr2);
                ret = _FAIL;
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, "case 3\n");
                break;
        }

        if ((ret == _FAIL) || (ret == RTW_RX_HANDLED))
                goto exit;

        if (!psta) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "after to_fr_ds_chk; psta == NULL\n");
                ret = _FAIL;
                goto exit;
        }

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

        pattrib->hdrlen = sizeof(struct ieee80211_hdr_3addr);
        if (ieee80211_has_a4(hdr->frame_control))
                pattrib->hdrlen += ETH_ALEN;

        /* parsing QC field */
        if (pattrib->qos == 1) {
                __le16 *qptr = (__le16 *)ieee80211_get_qos_ctl(hdr);
                u16 qos_ctrl = le16_to_cpu(*qptr);

                pattrib->priority = qos_ctrl & IEEE80211_QOS_CTL_TID_MASK;
                pattrib->ack_policy = (qos_ctrl >> 5) & 3;
                pattrib->amsdu =
                        (qos_ctrl & IEEE80211_QOS_CTL_A_MSDU_PRESENT) >> 7;
                pattrib->hdrlen += IEEE80211_QOS_CTL_LEN;

                if (pattrib->priority != 0 && pattrib->priority != 3) {
                        adapter->recvpriv.bIsAnyNonBEPkts = true;
                }
        } else {
                pattrib->priority = 0;
                pattrib->ack_policy = 0;
                pattrib->amsdu = 0;
        }

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

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

        /*  decache, drop duplicate recv packets */
        if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) ==
            _FAIL) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "decache : drop pkt\n");
                ret = _FAIL;
                goto exit;
        }

        if (pattrib->privacy) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "validate_recv_data_frame:pattrib->privacy =%x\n",
                         pattrib->privacy);
                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "^^^^^^^^^^^is_multicast_ether_addr(pattrib->ra(0x%02x)) =%d^^^^^^^^^^^^^^^6\n",
                         pattrib->ra[0],
                         is_multicast_ether_addr(pattrib->ra));

                GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt,
                               is_multicast_ether_addr(pattrib->ra));

                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "pattrib->encrypt =%d\n", pattrib->encrypt);

                switch (pattrib->encrypt) {
                case WLAN_CIPHER_SUITE_WEP40:
                case WLAN_CIPHER_SUITE_WEP104:
                        pattrib->iv_len = IEEE80211_WEP_IV_LEN;
                        pattrib->icv_len = IEEE80211_WEP_ICV_LEN;
                        break;
                case WLAN_CIPHER_SUITE_TKIP:
                        pattrib->iv_len = IEEE80211_TKIP_IV_LEN;
                        pattrib->icv_len = IEEE80211_TKIP_ICV_LEN;
                        break;
                case WLAN_CIPHER_SUITE_CCMP:
                        pattrib->iv_len = IEEE80211_CCMP_HDR_LEN;
                        pattrib->icv_len = IEEE80211_CCMP_MIC_LEN;
                        break;
                default:
                        pattrib->iv_len = 0;
                        pattrib->icv_len = 0;
                        break;
                }
        } else {
                pattrib->encrypt = 0;
                pattrib->iv_len = 0;
                pattrib->icv_len = 0;
        }

exit:



        return ret;
}

static void dump_rx_pkt(struct sk_buff *skb, u16 type, int level)
{
        int i;
        u8 *ptr;

        if ((level == 1) ||
            ((level == 2) && (type == IEEE80211_FTYPE_MGMT)) ||
            ((level == 3) && (type == IEEE80211_FTYPE_DATA))) {

                ptr = skb->data;

                DBG_8723A("#############################\n");

                for (i = 0; i < 64; i = i + 8)
                        DBG_8723A("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n",
                                  *(ptr + i), *(ptr + i + 1), *(ptr + i + 2),
                                  *(ptr + i + 3), *(ptr + i + 4),
                                  *(ptr + i + 5), *(ptr + i + 6),
                                  *(ptr + i + 7));
                DBG_8723A("#############################\n");
        }
}

static int validate_recv_frame(struct rtw_adapter *adapter,
                               struct 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;
        int retval = _SUCCESS;
        struct rx_pkt_attrib *pattrib = & precv_frame->attrib;
        struct sk_buff *skb = precv_frame->pkt;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        u8 ver;
        u8 bDumpRxPkt;
        u16 seq_ctrl, fctl;

        fctl = le16_to_cpu(hdr->frame_control);
        ver = fctl & IEEE80211_FCTL_VERS;
        type = fctl & IEEE80211_FCTL_FTYPE;
        subtype = fctl & IEEE80211_FCTL_STYPE;

        /* add version chk */
        if (ver != 0) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "validate_recv_data_frame fail! (ver!= 0)\n");
                retval = _FAIL;
                goto exit;
        }

        seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
        pattrib->frag_num = seq_ctrl & IEEE80211_SCTL_FRAG;
        pattrib->seq_num = seq_ctrl >> 4;

        pattrib->pw_save = ieee80211_has_pm(hdr->frame_control);
        pattrib->mfrag = ieee80211_has_morefrags(hdr->frame_control);
        pattrib->mdata = ieee80211_has_moredata(hdr->frame_control);
        pattrib->privacy = ieee80211_has_protected(hdr->frame_control);
        pattrib->order = ieee80211_has_order(hdr->frame_control);

        GetHalDefVar8192CUsb(adapter, HAL_DEF_DBG_DUMP_RXPKT, &bDumpRxPkt);

        if (unlikely(bDumpRxPkt == 1))
                dump_rx_pkt(skb, type, bDumpRxPkt);

        switch (type) {
        case IEEE80211_FTYPE_MGMT:
                retval = validate_recv_mgnt_frame(adapter, precv_frame);
                if (retval == _FAIL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "validate_recv_mgnt_frame fail\n");
                }
                retval = _FAIL; /*  only data frame return _SUCCESS */
                break;
        case IEEE80211_FTYPE_CTL:
                retval = validate_recv_ctrl_frame(adapter, precv_frame);
                if (retval == _FAIL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "validate_recv_ctrl_frame fail\n");
                }
                retval = _FAIL; /*  only data frame return _SUCCESS */
                break;
        case IEEE80211_FTYPE_DATA:
                pattrib->qos = (subtype & IEEE80211_STYPE_QOS_DATA) ? 1 : 0;
                retval = validate_recv_data_frame(adapter, precv_frame);
                if (retval == _FAIL) {
                        struct recv_priv *precvpriv = &adapter->recvpriv;

                        precvpriv->rx_drop++;
                }
                break;
        default:
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "validate_recv_data_frame fail! type = 0x%x\n", type);
                retval = _FAIL;
                break;
        }

exit:
        return retval;
}

/* remove the wlanhdr and add the eth_hdr */

static int wlanhdr_to_ethhdr (struct recv_frame *precvframe)
{
        u16     eth_type, len, hdrlen;
        u8      bsnaphdr;
        u8      *psnap;
        struct rtw_adapter *adapter = precvframe->adapter;
        struct mlme_priv *pmlmepriv = &adapter->mlmepriv;

        struct sk_buff *skb = precvframe->pkt;
        u8 *ptr;
        struct rx_pkt_attrib *pattrib = &precvframe->attrib;



        ptr = skb->data;
        hdrlen = pattrib->hdrlen;
        psnap = ptr + hdrlen;
        eth_type = (psnap[6] << 8) | psnap[7];
        /* convert hdr + possible LLC headers into Ethernet header */
        /* eth_type = (psnap_type[0] << 8) | psnap_type[1]; */
        if ((ether_addr_equal(psnap, rfc1042_header) &&
             eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
            ether_addr_equal(psnap, bridge_tunnel_header)) {
                /* remove RFC1042 or Bridge-Tunnel encapsulation
                   and replace EtherType */
                bsnaphdr = true;
                hdrlen += SNAP_SIZE;
        } else {
                /* Leave Ethernet header part of hdr and full payload */
                bsnaphdr = false;
                eth_type = (psnap[0] << 8) | psnap[1];
        }

        len = skb->len - hdrlen;

        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                 "=== pattrib->hdrlen: %x,  pattrib->iv_len:%x ===\n",
                 pattrib->hdrlen,  pattrib->iv_len);

        pattrib->eth_type = eth_type;
        if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
                ptr += hdrlen;
                *ptr = 0x87;
                *(ptr + 1) = 0x12;

                eth_type = 0x8712;
                /*  append rx status for mp test packets */

                ptr = skb_pull(skb, (hdrlen - sizeof(struct ethhdr) + 2) - 24);
                memcpy(ptr, skb->head, 24);
                ptr += 24;
        } else {
                ptr = skb_pull(skb, (hdrlen - sizeof(struct ethhdr) +
                                     (bsnaphdr ? 2:0)));
        }

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

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


        return _SUCCESS;
}

/* perform defrag */
struct recv_frame *recvframe_defrag(struct rtw_adapter *adapter,
                                    struct rtw_queue *defrag_q);
struct recv_frame *recvframe_defrag(struct rtw_adapter *adapter,
                                    struct rtw_queue *defrag_q)
{
        struct list_head *plist, *phead, *ptmp;
        u8      *data, wlanhdr_offset;
        u8      curfragnum;
        struct recv_frame *pnfhdr;
        struct recv_frame *prframe, *pnextrframe;
        struct rtw_queue        *pfree_recv_queue;
        struct sk_buff *skb;



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

        phead = get_list_head(defrag_q);
        plist = phead->next;
        prframe = container_of(plist, struct recv_frame, list);
        list_del_init(&prframe->list);
        skb = prframe->pkt;

        if (curfragnum != prframe->attrib.frag_num) {
                /* the first fragment number must be 0 */
                /* free the whole queue */
                rtw_free_recvframe23a(prframe);
                rtw_free_recvframe23a_queue(defrag_q);

                return NULL;
        }

        curfragnum++;

        phead = get_list_head(defrag_q);

        data = prframe->pkt->data;

        list_for_each_safe(plist, ptmp, phead) {
                pnfhdr = container_of(plist, struct recv_frame, list);
                pnextrframe = (struct recv_frame *)pnfhdr;
                /* 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_recvframe23a(prframe);
                        rtw_free_recvframe23a_queue(defrag_q);
                        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;

                skb_pull(pnfhdr->pkt, wlanhdr_offset);

                /* append  to first fragment frame's tail
                   (if privacy frame, pull the ICV) */

                skb_trim(skb, skb->len - prframe->attrib.icv_len);

                memcpy(skb_tail_pointer(skb), pnfhdr->pkt->data,
                       pnfhdr->pkt->len);

                skb_put(skb, pnfhdr->pkt->len);

                prframe->attrib.icv_len = pnfhdr->attrib.icv_len;
        }

        /* free the defrag_q queue and return the prframe */
        rtw_free_recvframe23a_queue(defrag_q);

        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                 "Performance defrag!!!!!\n");



        return prframe;
}

/* check if need to defrag, if needed queue the frame to defrag_q */
struct recv_frame *recvframe_chk_defrag23a(struct rtw_adapter *padapter,
                                        struct recv_frame *precv_frame)
{
        u8      ismfrag;
        u8      fragnum;
        u8      *psta_addr;
        struct recv_frame *pfhdr;
        struct sta_info *psta;
        struct sta_priv *pstapriv;
        struct list_head *phead;
        struct recv_frame *prtnframe = NULL;
        struct rtw_queue *pfree_recv_queue, *pdefrag_q;



        pstapriv = &padapter->stapriv;

        pfhdr = precv_frame;

        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_stainfo23a(pstapriv, psta_addr);
        if (!psta) {
                struct ieee80211_hdr *hdr =
                        (struct ieee80211_hdr *) pfhdr->pkt->data;
                if (!ieee80211_is_data(hdr->frame_control)) {
                        psta = rtw_get_bcmc_stainfo23a(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 != NULL) {
                        if (fragnum == 0) {
                                /* the first fragment */
                                if (!list_empty(&pdefrag_q->queue)) {
                                        /* free current defrag_q */
                                        rtw_free_recvframe23a_queue(pdefrag_q);
                                }
                        }

                        /* 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); */

                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "Enqueuq: ismfrag = %d, fragnum = %d\n",
                                 ismfrag, fragnum);

                        prtnframe = NULL;

                } else {
                        /* can't find this ta's defrag_queue,
                           so free this recv_frame */
                        rtw_free_recvframe23a(precv_frame);
                        prtnframe = NULL;
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "Free because pdefrag_q == NULL: ismfrag = %d, fragnum = %d\n",
                                 ismfrag, fragnum);
                }
        }

        if ((ismfrag == 0) && (fragnum != 0)) {
                /* the last fragment frame */
                /* enqueue the last fragment */
                if (pdefrag_q != NULL) {
                        /* 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 */
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                                 "defrag: ismfrag = %d, fragnum = %d\n",
                                 ismfrag, fragnum);
                        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_recvframe23a(precv_frame);
                        prtnframe = NULL;
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "Free because pdefrag_q == NULL: ismfrag = %d, fragnum = %d\n",
                                 ismfrag, fragnum);
                }

        }

        if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
                /* after defrag we must check tkip mic code */
                if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "recvframe_chkmic(padapter,  prtnframe) ==_FAIL\n");
                        rtw_free_recvframe23a(prtnframe);
                        prtnframe = NULL;
                }
        }



        return prtnframe;
}

int amsdu_to_msdu(struct rtw_adapter *padapter, struct recv_frame *prframe);
int amsdu_to_msdu(struct rtw_adapter *padapter, struct recv_frame *prframe)
{
        struct rx_pkt_attrib *pattrib;
        struct sk_buff *skb, *sub_skb;
        struct sk_buff_head skb_list;

        pattrib = &prframe->attrib;

        skb = prframe->pkt;
        skb_pull(skb, prframe->attrib.hdrlen);
        __skb_queue_head_init(&skb_list);

        ieee80211_amsdu_to_8023s(skb, &skb_list, NULL, 0, 0, false);

        while (!skb_queue_empty(&skb_list)) {
                sub_skb = __skb_dequeue(&skb_list);

                sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
                sub_skb->dev = padapter->pnetdev;

                sub_skb->ip_summed = CHECKSUM_NONE;

                netif_rx(sub_skb);
        }

        prframe->pkt = NULL;
        rtw_free_recvframe23a(prframe);
        return _SUCCESS;
}

int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num);
int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
{
        u8      wsize = preorder_ctrl->wsize_b;
        u16     wend = (preorder_ctrl->indicate_seq + wsize -1) & 0xFFF;

        /*  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;
        }
        return true;
}

static int enqueue_reorder_recvframe23a(struct recv_reorder_ctrl *preorder_ctrl,
                                        struct recv_frame *prframe)
{
        struct rx_pkt_attrib *pattrib = &prframe->attrib;
        struct rtw_queue *ppending_recvframe_queue;
        struct list_head *phead, *plist, *ptmp;
        struct recv_frame *hdr;
        struct rx_pkt_attrib *pnextattrib;

        ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
        /* DbgPrint("+enqueue_reorder_recvframe23a()\n"); */

        /* spin_lock_irqsave(&ppending_recvframe_queue->lock); */
        /* spin_lock_ex(&ppending_recvframe_queue->lock); */

        phead = get_list_head(ppending_recvframe_queue);

        list_for_each_safe(plist, ptmp, phead) {
                hdr = container_of(plist, struct recv_frame, list);
                pnextattrib = &hdr->attrib;

                if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num)) {
                        continue;
                } 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); */
                        return false;
                } else {
                        break;
                }

                /* DbgPrint("enqueue_reorder_recvframe23a():while\n"); */
        }

        /* spin_lock_irqsave(&ppending_recvframe_queue->lock); */
        /* spin_lock_ex(&ppending_recvframe_queue->lock); */

        list_del_init(&prframe->list);

        list_add_tail(&prframe->list, plist);

        /* spin_unlock_ex(&ppending_recvframe_queue->lock); */
        /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock); */

        return true;
}

int recv_indicatepkts_in_order(struct rtw_adapter *padapter,
                               struct recv_reorder_ctrl *preorder_ctrl,
                               int bforced);
int recv_indicatepkts_in_order(struct rtw_adapter *padapter,
                               struct recv_reorder_ctrl *preorder_ctrl,
                               int bforced)
{
        /* u8 bcancelled; */
        struct list_head *phead, *plist;
        struct recv_frame *prframe;
        struct rx_pkt_attrib *pattrib;
        /* u8 index = 0; */
        int bPktInBuf = false;
        struct recv_priv *precvpriv;
        struct rtw_queue *ppending_recvframe_queue;

        precvpriv = &padapter->recvpriv;
        ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
        /* DbgPrint("+recv_indicatepkts_in_order\n"); */

        /* spin_lock_irqsave(&ppending_recvframe_queue->lock); */
        /* spin_lock_ex(&ppending_recvframe_queue->lock); */

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

        /*  Handling some condition for forced indicate case. */
        if (bforced) {
                if (list_empty(phead)) {
                        /*  spin_unlock_irqrestore(&ppending_recvframe_queue->lock); */
                        /* spin_unlock_ex(&ppending_recvframe_queue->lock); */
                        return true;
                }

                prframe = container_of(plist, struct recv_frame, list);
                pattrib = &prframe->attrib;
                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 = container_of(plist, struct recv_frame, list);
                pattrib = &prframe->attrib;

                if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                 "recv_indicatepkts_in_order: indicate =%d seq =%d amsdu =%d\n",
                                 preorder_ctrl->indicate_seq,
                                 pattrib->seq_num, pattrib->amsdu);

                        plist = plist->next;
                        list_del_init(&prframe->list);

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

                        if (!pattrib->amsdu) {
                                if ((padapter->bDriverStopped == false) &&
                                    (padapter->bSurpriseRemoved == false)) {
                                        rtw_recv_indicatepkt23a(padapter, prframe);
                                }
                        } else {
                                if (amsdu_to_msdu(padapter, prframe) !=
                                    _SUCCESS)
                                        rtw_free_recvframe23a(prframe);
                        }

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

                } else {
                        bPktInBuf = true;
                        break;
                }

                /* DbgPrint("recv_indicatepkts_in_order():while\n"); */
        }

        /* spin_unlock_ex(&ppending_recvframe_queue->lock); */
        /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock); */

        return bPktInBuf;
}

int recv_indicatepkt_reorder(struct rtw_adapter *padapter,
                             struct recv_frame *prframe);
int recv_indicatepkt_reorder(struct rtw_adapter *padapter,
                             struct recv_frame *prframe)
{
        int retval = _SUCCESS;
        struct rx_pkt_attrib *pattrib;
        struct recv_reorder_ctrl *preorder_ctrl;
        struct rtw_queue *ppending_recvframe_queue;

        pattrib = &prframe->attrib;
        preorder_ctrl = prframe->preorder_ctrl;
        ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;

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

                if ((pattrib->qos!= 1) || (pattrib->eth_type == ETH_P_ARP) ||
                    (pattrib->ack_policy != 0)) {
                        if ((padapter->bDriverStopped == false) &&
                            (padapter->bSurpriseRemoved == false)) {
                                RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                         "@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n");

                                rtw_recv_indicatepkt23a(padapter, prframe);

                                return _SUCCESS;
                        }

                        return _FAIL;
                }

                if (preorder_ctrl->enable == false) {
                        /* indicate this recv_frame */
                        preorder_ctrl->indicate_seq = pattrib->seq_num;
                        rtw_recv_indicatepkt23a(padapter, prframe);

                        preorder_ctrl->indicate_seq =
                                (preorder_ctrl->indicate_seq + 1) % 4096;
                        return _SUCCESS;
                }
        } else {
                 /* 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;
                        return retval;
                }
        }

        spin_lock_bh(&ppending_recvframe_queue->lock);

        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                 "recv_indicatepkt_reorder: indicate =%d seq =%d\n",
                 preorder_ctrl->indicate_seq, pattrib->seq_num);

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

        /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
        if (!enqueue_reorder_recvframe23a(preorder_ctrl, prframe)) {
                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. */
        /*  */

        if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false) == true) {
                mod_timer(&preorder_ctrl->reordering_ctrl_timer,
                          jiffies + msecs_to_jiffies(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_handler23a(unsigned long pcontext)
{
        struct recv_reorder_ctrl *preorder_ctrl;
        struct rtw_adapter *padapter;
        struct rtw_queue *ppending_recvframe_queue;

        preorder_ctrl = (struct recv_reorder_ctrl *)pcontext;
        padapter = preorder_ctrl->padapter;
        ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;

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

        /* DBG_8723A("+rtw_reordering_ctrl_timeout_handler23a() =>\n"); */

        spin_lock_bh(&ppending_recvframe_queue->lock);

        if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true) {
                mod_timer(&preorder_ctrl->reordering_ctrl_timer,
                          jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
        }

        spin_unlock_bh(&ppending_recvframe_queue->lock);
}

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

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

                /*  including perform A-MPDU Rx Ordering Buffer Control */
                if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
                        if ((padapter->bDriverStopped == false) &&
                            (padapter->bSurpriseRemoved == false)) {
                                retval = _FAIL;
                                return retval;
                        }
                }
        } else { /* B/G mode */
                retval = wlanhdr_to_ethhdr(prframe);
                if (retval != _SUCCESS) {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                                 "wlanhdr_to_ethhdr: drop pkt\n");
                        return retval;
                }

                if ((padapter->bDriverStopped == false) &&
                    (padapter->bSurpriseRemoved == false)) {
                        /* indicate this recv_frame */
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                 "@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n");
                        rtw_recv_indicatepkt23a(padapter, prframe);
                } else {
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                 "@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n");

                        RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
                                 "recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)\n",
                                 padapter->bDriverStopped,
                                 padapter->bSurpriseRemoved);
                        retval = _FAIL;
                        return retval;
                }

        }

        return retval;
}

static int recv_func_prehandle(struct rtw_adapter *padapter,
                               struct recv_frame *rframe)
{
        int ret = _SUCCESS;

        /* check the frame crtl field and decache */
        ret = validate_recv_frame(padapter, rframe);
        if (ret != _SUCCESS) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
                         "recv_func: validate_recv_frame fail! drop pkt\n");
                rtw_free_recvframe23a(rframe);
                goto exit;
        }

exit:
        return ret;
}

static int recv_func_posthandle(struct rtw_adapter *padapter,
                                struct recv_frame *prframe)
{
        int ret = _SUCCESS;
        struct recv_frame *orig_prframe = prframe;
        struct recv_priv *precvpriv = &padapter->recvpriv;

        /*  DATA FRAME */
        prframe = decryptor(padapter, prframe);
        if (prframe == NULL) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "decryptor: drop pkt\n");
                ret = _FAIL;
                goto _recv_data_drop;
        }

        prframe = recvframe_chk_defrag23a(padapter, prframe);
        if (!prframe) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "recvframe_chk_defrag23a: drop pkt\n");
                goto _recv_data_drop;
        }

        /*
         * Pull off crypto headers
         */
        if (prframe->attrib.iv_len > 0) {
                skb_pull(prframe->pkt, prframe->attrib.iv_len);
        }

        if (prframe->attrib.icv_len > 0) {
                skb_trim(prframe->pkt,
                         prframe->pkt->len - prframe->attrib.icv_len);
        }

        prframe = portctrl(padapter, prframe);
        if (!prframe) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "portctrl: drop pkt\n");
                ret = _FAIL;
                goto _recv_data_drop;
        }

        count_rx_stats(padapter, prframe, NULL);

        ret = process_recv_indicatepkts(padapter, prframe);
        if (ret != _SUCCESS) {
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
                         "recv_func: process_recv_indicatepkts fail!\n");
                rtw_free_recvframe23a(orig_prframe);/* free this recv_frame */
                goto _recv_data_drop;
        }
        return ret;

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

int rtw_recv_entry23a(struct recv_frame *rframe)
{
        int ret, r;
        struct rtw_adapter *padapter = rframe->adapter;
        struct rx_pkt_attrib *prxattrib = &rframe->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) {
                struct recv_frame *pending_frame;

                while ((pending_frame = rtw_alloc_recvframe23a(&padapter->recvpriv.uc_swdec_pending_queue))) {
                        r = recv_func_posthandle(padapter, pending_frame);
                        if (r == _SUCCESS)
                                DBG_8723A("%s: dequeue uc_swdec_pending_queue\n", __func__);
                }
        }

        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_multicast_ether_addr(prxattrib->ra) &&
                    prxattrib->encrypt > 0 &&
                    (prxattrib->bdecrypted == 0) &&
                    !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
                    !psecuritypriv->busetkipkey) {
                        rtw_enqueue_recvframe23a(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
                        DBG_8723A("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
                        goto exit;
                }

                ret = recv_func_posthandle(padapter, rframe);

                recvpriv->rx_pkts++;
        }

exit:
        return ret;
}

void rtw_signal_stat_timer_hdl23a(unsigned long data)
{
        struct rtw_adapter *adapter = (struct rtw_adapter *)data;
        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 num_signal_qual = 0;
        u8 _alpha = 3;  /* this value is based on converging_constant = 5000 */
                        /* and sampling_interval = 1000 */

        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;
        }

        /* update value of signal_strength, rssi, signal_qual */
        if (!check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY)) {
                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->signal_qual = tmp_q;

                DBG_8723A("%s signal_strength:%3u, signal_qual:%3u, "
                          "num_signal_strength:%u, num_signal_qual:%u\n",
                          __func__, recvpriv->signal_strength,
                          recvpriv->signal_qual, num_signal_strength,
                          num_signal_qual);
        }

        rtw_set_signal_stat_timer(recvpriv);
}