text: // SPDX-License-Identifier: GPL-2.0
  /******************************************************************************
   *
   * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   *
   ******************************************************************************/
  #define _RTW_RECV_C_
  
  #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_SIZE;
  			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_SIZE, 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 < (ETHERNET_HEADER_SIZE + 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;
  
  		/* DbgPrint("check_indicate_seq, 1st->indicate_seq =%d\n", precvpriv->indicate_seq); */
  	}
  
  	/* DbgPrint("enter->check_indicate_seq(): IndicateSeq: %d, NewSeq: %d\n", precvpriv->indicate_seq, seq_num); */
  
  	/*  Drop out the packet which SeqNum is smaller than WinStart */
  	if (SN_LESS(seq_num, preorder_ctrl->indicate_seq)) {
  		/* DbgPrint("CheckRxTsIndicateSeq(): Packet Drop! IndicateSeq: %d, NewSeq: %d\n", precvpriv->indicate_seq, seq_num); */
  
  		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)) {
  		/* DbgPrint("CheckRxTsIndicateSeq(): Window Shift! IndicateSeq: %d, NewSeq: %d\n", precvpriv->indicate_seq, 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++;
  	}
  
  	/* DbgPrint("exit->check_indicate_seq(): IndicateSeq: %d, NewSeq: %d\n", precvpriv->indicate_seq, seq_num); */
  
  	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;
  
  	/* DbgPrint("+enqueue_reorder_recvframe()\n"); */
  
  	/* 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;
  
  		/* DbgPrint("enqueue_reorder_recvframe():while\n"); */
  
  	}
  
  
  	/* 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;
  
  	/* DbgPrint("+recv_indicatepkts_in_order\n"); */
  
  	/* 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 */
  			/* RT_ASSERT((index<=REORDER_WIN_SIZE), ("RxReorderIndicatePacket(): Rx Reorder buffer full!!\n")); */
  
  
  			/* indicate this recv_frame */
  			/* DbgPrint("recv_indicatepkts_in_order, indicate_seq =%d, seq_num =%d\n", precvpriv->indicate_seq, pattrib->seq_num); */
  			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;
  		}
  
  		/* DbgPrint("recv_indicatepkts_in_order():while\n"); */
  
  	}
  
  	/* 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)) {
  		/* DbgPrint("recv_indicatepkt_reorder, enqueue_reorder_recvframe fail!\n"); */
  		/* 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 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);
  
  }
  