path: root/drivers/staging/rt2860/sta/rtmp_data.c

/*
 *************************************************************************
 * Ralink Tech Inc.
 * 5F., No.36, Taiyuan St., Jhubei City,
 * Hsinchu County 302,
 * Taiwan, R.O.C.
 *
 * (c) Copyright 2002-2007, Ralink Technology, Inc.
 *
 * This program is free software; you can redistribute it and/or modify  *
 * it under the terms of the GNU General Public License as published by  *
 * the Free Software Foundation; either version 2 of the License, or     *
 * (at your option) any later version.                                   *
 *                                                                       *
 * 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.                          *
 *                                                                       *
 * You should have received a copy of the GNU General Public License     *
 * along with this program; if not, write to the                         *
 * Free Software Foundation, Inc.,                                       *
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 *                                                                       *
 *************************************************************************

	Module Name:
	rtmp_data.c

	Abstract:
	Data path subroutines

	Revision History:
	Who 		When			What
	--------	----------		----------------------------------------------
	John		      Aug/17/04		major modification for RT2561/2661
	Jan Lee	      Mar/17/06		major modification for RT2860 New Ring Design
*/
#include "../rt_config.h"



VOID STARxEAPOLFrameIndicate(
	IN	PRTMP_ADAPTER	pAd,
	IN	MAC_TABLE_ENTRY	*pEntry,
	IN	RX_BLK			*pRxBlk,
	IN	UCHAR			FromWhichBSSID)
{
	PRT28XX_RXD_STRUC	pRxD = &(pRxBlk->RxD);
	PRXWI_STRUC		pRxWI = pRxBlk->pRxWI;
	UCHAR			*pTmpBuf;

#ifdef WPA_SUPPLICANT_SUPPORT
	if (pAd->StaCfg.WpaSupplicantUP)
	{
		// All EAPoL frames have to pass to upper layer (ex. WPA_SUPPLICANT daemon)
		// TBD : process fragmented EAPol frames
		{
			// In 802.1x mode, if the received frame is EAP-SUCCESS packet, turn on the PortSecured variable
			if ( pAd->StaCfg.IEEE8021X == TRUE &&
				 (EAP_CODE_SUCCESS == WpaCheckEapCode(pAd, pRxBlk->pData, pRxBlk->DataSize, LENGTH_802_1_H)))
			{
				PUCHAR	Key;
				UCHAR 	CipherAlg;
				int     idx = 0;

				DBGPRINT_RAW(RT_DEBUG_TRACE, ("Receive EAP-SUCCESS Packet\n"));
				STA_PORT_SECURED(pAd);

                if (pAd->StaCfg.IEEE8021x_required_keys == FALSE)
                {
                    idx = pAd->StaCfg.DesireSharedKeyId;
                    CipherAlg = pAd->StaCfg.DesireSharedKey[idx].CipherAlg;
					Key = pAd->StaCfg.DesireSharedKey[idx].Key;

                    if (pAd->StaCfg.DesireSharedKey[idx].KeyLen > 0)
    				{
						MAC_TABLE_ENTRY *pEntry = &pAd->MacTab.Content[BSSID_WCID];

						// Set key material and cipherAlg to Asic
						AsicAddSharedKeyEntry(pAd, BSS0, idx, CipherAlg, Key, NULL, NULL);

						// Assign group key info
						RTMPAddWcidAttributeEntry(pAd, BSS0, idx, CipherAlg, NULL);

						// Assign pairwise key info
						RTMPAddWcidAttributeEntry(pAd, BSS0, idx, CipherAlg, pEntry);

                        pAd->IndicateMediaState = NdisMediaStateConnected;
                        pAd->ExtraInfo = GENERAL_LINK_UP;
						// For Preventing ShardKey Table is cleared by remove key procedure.
    					pAd->SharedKey[BSS0][idx].CipherAlg = CipherAlg;
						pAd->SharedKey[BSS0][idx].KeyLen = pAd->StaCfg.DesireSharedKey[idx].KeyLen;
						NdisMoveMemory(pAd->SharedKey[BSS0][idx].Key,
									   pAd->StaCfg.DesireSharedKey[idx].Key,
									   pAd->StaCfg.DesireSharedKey[idx].KeyLen);
    				}
				}
			}

			Indicate_Legacy_Packet(pAd, pRxBlk, FromWhichBSSID);
			return;
		}
	}
	else
#endif // WPA_SUPPLICANT_SUPPORT //
	{
		// Special DATA frame that has to pass to MLME
		//	 1. Cisco Aironet frames for CCX2. We need pass it to MLME for special process
		//	 2. EAPOL handshaking frames when driver supplicant enabled, pass to MLME for special process
		{
			pTmpBuf = pRxBlk->pData - LENGTH_802_11;
			NdisMoveMemory(pTmpBuf, pRxBlk->pHeader, LENGTH_802_11);
			REPORT_MGMT_FRAME_TO_MLME(pAd, pRxWI->WirelessCliID, pTmpBuf, pRxBlk->DataSize + LENGTH_802_11, pRxWI->RSSI0, pRxWI->RSSI1, pRxWI->RSSI2, pRxD->PlcpSignal);
			DBGPRINT_RAW(RT_DEBUG_TRACE, ("!!! report EAPOL/AIRONET DATA to MLME (len=%d) !!!\n", pRxBlk->DataSize));
		}
	}

	RELEASE_NDIS_PACKET(pAd, pRxBlk->pRxPacket, NDIS_STATUS_FAILURE);
	return;

}

VOID STARxDataFrameAnnounce(
	IN	PRTMP_ADAPTER	pAd,
	IN	MAC_TABLE_ENTRY	*pEntry,
	IN	RX_BLK			*pRxBlk,
	IN	UCHAR			FromWhichBSSID)
{

	// non-EAP frame
	if (!RTMPCheckWPAframe(pAd, pEntry, pRxBlk->pData, pRxBlk->DataSize, FromWhichBSSID))
	{
		{
			// drop all non-EAP DATA frame before
			// this client's Port-Access-Control is secured
			if (pRxBlk->pHeader->FC.Wep)
			{
				// unsupported cipher suite
				if (pAd->StaCfg.WepStatus == Ndis802_11EncryptionDisabled)
				{
					// release packet
					RELEASE_NDIS_PACKET(pAd, pRxBlk->pRxPacket, NDIS_STATUS_FAILURE);
					return;
				}
			}
			else
			{
				// encryption in-use but receive a non-EAPOL clear text frame, drop it
				if ((pAd->StaCfg.WepStatus != Ndis802_11EncryptionDisabled) &&
					(pAd->StaCfg.PortSecured == WPA_802_1X_PORT_NOT_SECURED))
				{
					// release packet
					RELEASE_NDIS_PACKET(pAd, pRxBlk->pRxPacket, NDIS_STATUS_FAILURE);
					return;
				}
			}
		}
		RX_BLK_CLEAR_FLAG(pRxBlk, fRX_EAP);
		if (!RX_BLK_TEST_FLAG(pRxBlk, fRX_ARALINK))
		{
			// Normal legacy, AMPDU or AMSDU
			CmmRxnonRalinkFrameIndicate(pAd, pRxBlk, FromWhichBSSID);

		}
		else
		{
			// ARALINK
			CmmRxRalinkFrameIndicate(pAd, pEntry, pRxBlk, FromWhichBSSID);
		}
#ifdef QOS_DLS_SUPPORT
		RX_BLK_CLEAR_FLAG(pRxBlk, fRX_DLS);
#endif // QOS_DLS_SUPPORT //
	}
	else
	{
		RX_BLK_SET_FLAG(pRxBlk, fRX_EAP);
#ifdef DOT11_N_SUPPORT
		if (RX_BLK_TEST_FLAG(pRxBlk, fRX_AMPDU) && (pAd->CommonCfg.bDisableReordering == 0))
		{
			Indicate_AMPDU_Packet(pAd, pRxBlk, FromWhichBSSID);
		}
		else
#endif // DOT11_N_SUPPORT //
		{
			// Determin the destination of the EAP frame
			//  to WPA state machine or upper layer
			STARxEAPOLFrameIndicate(pAd, pEntry, pRxBlk, FromWhichBSSID);
		}
	}
}


// For TKIP frame, calculate the MIC value
BOOLEAN STACheckTkipMICValue(
	IN	PRTMP_ADAPTER	pAd,
	IN	MAC_TABLE_ENTRY	*pEntry,
	IN	RX_BLK			*pRxBlk)
{
	PHEADER_802_11	pHeader = pRxBlk->pHeader;
	UCHAR			*pData = pRxBlk->pData;
	USHORT			DataSize = pRxBlk->DataSize;
	UCHAR			UserPriority = pRxBlk->UserPriority;
	PCIPHER_KEY		pWpaKey;
	UCHAR			*pDA, *pSA;

	pWpaKey = &pAd->SharedKey[BSS0][pRxBlk->pRxWI->KeyIndex];

	pDA = pHeader->Addr1;
	if (RX_BLK_TEST_FLAG(pRxBlk, fRX_INFRA))
	{
		pSA = pHeader->Addr3;
	}
	else
	{
		pSA = pHeader->Addr2;
	}

	if (RTMPTkipCompareMICValue(pAd,
								pData,
								pDA,
								pSA,
								pWpaKey->RxMic,
								UserPriority,
								DataSize) == FALSE)
	{
		DBGPRINT_RAW(RT_DEBUG_ERROR,("Rx MIC Value error 2\n"));

#ifdef WPA_SUPPLICANT_SUPPORT
		if (pAd->StaCfg.WpaSupplicantUP)
		{
			WpaSendMicFailureToWpaSupplicant(pAd, (pWpaKey->Type == PAIRWISEKEY) ? TRUE : FALSE);
		}
		else
#endif // WPA_SUPPLICANT_SUPPORT //
		{
			RTMPReportMicError(pAd, pWpaKey);
		}

		// release packet
		RELEASE_NDIS_PACKET(pAd, pRxBlk->pRxPacket, NDIS_STATUS_FAILURE);
		return FALSE;
	}

	return TRUE;
}


//
// All Rx routines use RX_BLK structure to hande rx events
// It is very important to build pRxBlk attributes
//  1. pHeader pointer to 802.11 Header
//  2. pData pointer to payload including LLC (just skip Header)
//  3. set payload size including LLC to DataSize
//  4. set some flags with RX_BLK_SET_FLAG()
//
VOID STAHandleRxDataFrame(
	IN	PRTMP_ADAPTER	pAd,
	IN	RX_BLK			*pRxBlk)
{
	PRT28XX_RXD_STRUC				pRxD = &(pRxBlk->RxD);
	PRXWI_STRUC						pRxWI = pRxBlk->pRxWI;
	PHEADER_802_11					pHeader = pRxBlk->pHeader;
	PNDIS_PACKET					pRxPacket = pRxBlk->pRxPacket;
	BOOLEAN 						bFragment = FALSE;
	MAC_TABLE_ENTRY	    			*pEntry = NULL;
	UCHAR							FromWhichBSSID = BSS0;
	UCHAR                           UserPriority = 0;

	{
		// before LINK UP, all DATA frames are rejected
		if (!OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_MEDIA_STATE_CONNECTED))
		{
			// release packet
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
			return;
		}

#ifdef QOS_DLS_SUPPORT
		//if ((pHeader->FC.FrDs == 0) && (pHeader->FC.ToDs == 0))
		if (RTMPRcvFrameDLSCheck(pAd, pHeader, pRxWI->MPDUtotalByteCount, pRxD))
		{
			return;
		}
#endif // QOS_DLS_SUPPORT //

		// Drop not my BSS frames
		if (pRxD->MyBss == 0)
		{
			{
				// release packet
				RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
				return;
			}
		}

		pAd->RalinkCounters.RxCountSinceLastNULL++;
		if (pAd->CommonCfg.bAPSDCapable && pAd->CommonCfg.APEdcaParm.bAPSDCapable && (pHeader->FC.SubType & 0x08))
		{
			UCHAR *pData;
			DBGPRINT(RT_DEBUG_TRACE,("bAPSDCapable\n"));

			// Qos bit 4
			pData = (PUCHAR)pHeader + LENGTH_802_11;
			if ((*pData >> 4) & 0x01)
			{
				DBGPRINT(RT_DEBUG_TRACE,("RxDone- Rcv EOSP frame, driver may fall into sleep\n"));
				pAd->CommonCfg.bInServicePeriod = FALSE;

				// Force driver to fall into sleep mode when rcv EOSP frame
				if (!OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE))
				{
					USHORT  TbttNumToNextWakeUp;
					USHORT  NextDtim = pAd->StaCfg.DtimPeriod;
					ULONG   Now;

					NdisGetSystemUpTime(&Now);
					NextDtim -= (USHORT)(Now - pAd->StaCfg.LastBeaconRxTime)/pAd->CommonCfg.BeaconPeriod;

					TbttNumToNextWakeUp = pAd->StaCfg.DefaultListenCount;
					if (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_RECEIVE_DTIM) && (TbttNumToNextWakeUp > NextDtim))
						TbttNumToNextWakeUp = NextDtim;

					MlmeSetPsmBit(pAd, PWR_SAVE);
					// if WMM-APSD is failed, try to disable following line
					AsicSleepThenAutoWakeup(pAd, TbttNumToNextWakeUp);
				}
			}

			if ((pHeader->FC.MoreData) && (pAd->CommonCfg.bInServicePeriod))
			{
				DBGPRINT(RT_DEBUG_TRACE,("Sending another trigger frame when More Data bit is set to 1\n"));
			}
		}

		// Drop NULL, CF-ACK(no data), CF-POLL(no data), and CF-ACK+CF-POLL(no data) data frame
		if ((pHeader->FC.SubType & 0x04)) // bit 2 : no DATA
		{
			// release packet
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
			return;
		}

	    // Drop not my BSS frame (we can not only check the MyBss bit in RxD)
#ifdef QOS_DLS_SUPPORT
	    if (!pAd->CommonCfg.bDLSCapable)
	    {
#endif // QOS_DLS_SUPPORT //
		if (INFRA_ON(pAd))
		{
			// Infrastructure mode, check address 2 for BSSID
			if (!RTMPEqualMemory(&pHeader->Addr2, &pAd->CommonCfg.Bssid, 6))
			{
				// Receive frame not my BSSID
	            // release packet
	            RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
				return;
			}
		}
		else	// Ad-Hoc mode or Not associated
		{
			// Ad-Hoc mode, check address 3 for BSSID
			if (!RTMPEqualMemory(&pHeader->Addr3, &pAd->CommonCfg.Bssid, 6))
			{
				// Receive frame not my BSSID
	            // release packet
	            RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
				return;
			}
		}
#ifdef QOS_DLS_SUPPORT
	    }
#endif // QOS_DLS_SUPPORT //

		//
		// find pEntry
		//
		if (pRxWI->WirelessCliID < MAX_LEN_OF_MAC_TABLE)
		{
			pEntry = &pAd->MacTab.Content[pRxWI->WirelessCliID];
		}
		else
		{
			// 1. release packet if infra mode
			// 2. new a pEntry if ad-hoc mode
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
			return;
		}

		// infra or ad-hoc
		if (INFRA_ON(pAd))
		{
			RX_BLK_SET_FLAG(pRxBlk, fRX_INFRA);
#ifdef QOS_DLS_SUPPORT
			if ((pHeader->FC.FrDs == 0) && (pHeader->FC.ToDs == 0))
				RX_BLK_SET_FLAG(pRxBlk, fRX_DLS);
			else
#endif // QOS_DLS_SUPPORT //
			ASSERT(pRxWI->WirelessCliID == BSSID_WCID);
		}

		// check Atheros Client
		if ((pEntry->bIAmBadAtheros == FALSE) &&  (pRxD->AMPDU == 1) && (pHeader->FC.Retry ))
		{
			pEntry->bIAmBadAtheros = TRUE;
			pAd->CommonCfg.IOTestParm.bCurrentAtheros = TRUE;
			pAd->CommonCfg.IOTestParm.bLastAtheros = TRUE;
			if (!STA_AES_ON(pAd))
			{
				AsicUpdateProtect(pAd, 8, ALLN_SETPROTECT, TRUE, FALSE);
			}
		}
	}

	pRxBlk->pData = (UCHAR *)pHeader;

	//
	// update RxBlk->pData, DataSize
	// 802.11 Header, QOS, HTC, Hw Padding
	//

	// 1. skip 802.11 HEADER
	{
		pRxBlk->pData += LENGTH_802_11;
		pRxBlk->DataSize -= LENGTH_802_11;
	}

	// 2. QOS
	if (pHeader->FC.SubType & 0x08)
	{
		RX_BLK_SET_FLAG(pRxBlk, fRX_QOS);
		UserPriority = *(pRxBlk->pData) & 0x0f;
		// bit 7 in QoS Control field signals the HT A-MSDU format
		if ((*pRxBlk->pData) & 0x80)
		{
			RX_BLK_SET_FLAG(pRxBlk, fRX_AMSDU);
		}

		// skip QOS contorl field
		pRxBlk->pData += 2;
		pRxBlk->DataSize -=2;
	}
	pRxBlk->UserPriority = UserPriority;

	// 3. Order bit: A-Ralink or HTC+
	if (pHeader->FC.Order)
	{
#ifdef AGGREGATION_SUPPORT
		if ((pRxWI->PHYMODE <= MODE_OFDM) && (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_AGGREGATION_INUSED)))
		{
			RX_BLK_SET_FLAG(pRxBlk, fRX_ARALINK);
		}
		else
#endif
		{
#ifdef DOT11_N_SUPPORT
			RX_BLK_SET_FLAG(pRxBlk, fRX_HTC);
			// skip HTC contorl field
			pRxBlk->pData += 4;
			pRxBlk->DataSize -= 4;
#endif // DOT11_N_SUPPORT //
		}
	}

	// 4. skip HW padding
	if (pRxD->L2PAD)
	{
		// just move pData pointer
		// because DataSize excluding HW padding
		RX_BLK_SET_FLAG(pRxBlk, fRX_PAD);
		pRxBlk->pData += 2;
	}

#ifdef DOT11_N_SUPPORT
	if (pRxD->BA)
	{
		RX_BLK_SET_FLAG(pRxBlk, fRX_AMPDU);
	}
#endif // DOT11_N_SUPPORT //


	//
	// Case I  Process Broadcast & Multicast data frame
	//
	if (pRxD->Bcast || pRxD->Mcast)
	{
		INC_COUNTER64(pAd->WlanCounters.MulticastReceivedFrameCount);

		// Drop Mcast/Bcast frame with fragment bit on
		if (pHeader->FC.MoreFrag)
		{
			// release packet
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
			return;
		}

		// Filter out Bcast frame which AP relayed for us
		if (pHeader->FC.FrDs && MAC_ADDR_EQUAL(pHeader->Addr3, pAd->CurrentAddress))
		{
			// release packet
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
			return;
		}

		Indicate_Legacy_Packet(pAd, pRxBlk, FromWhichBSSID);
		return;
	}
	else if (pRxD->U2M)
	{
		pAd->LastRxRate = (USHORT)((pRxWI->MCS) + (pRxWI->BW <<7) + (pRxWI->ShortGI <<8)+ (pRxWI->PHYMODE <<14)) ;


#ifdef QOS_DLS_SUPPORT
        if (RX_BLK_TEST_FLAG(pRxBlk, fRX_DLS))
		{
			MAC_TABLE_ENTRY *pDlsEntry = NULL;

			pDlsEntry = DlsEntryTableLookupByWcid(pAd, pRxWI->WirelessCliID, pHeader->Addr2, TRUE);
										                        if(pDlsEntry)
			Update_Rssi_Sample(pAd, &pDlsEntry->RssiSample, pRxWI);
		}
		else
#endif // QOS_DLS_SUPPORT //
		if (ADHOC_ON(pAd))
		{
			pEntry = MacTableLookup(pAd, pHeader->Addr2);
			if (pEntry)
				Update_Rssi_Sample(pAd, &pEntry->RssiSample, pRxWI);
		}


		Update_Rssi_Sample(pAd, &pAd->StaCfg.RssiSample, pRxWI);

		pAd->StaCfg.LastSNR0 = (UCHAR)(pRxWI->SNR0);
		pAd->StaCfg.LastSNR1 = (UCHAR)(pRxWI->SNR1);

		pAd->RalinkCounters.OneSecRxOkDataCnt++;


    	if (!((pHeader->Frag == 0) && (pHeader->FC.MoreFrag == 0)))
    	{
    		// re-assemble the fragmented packets
    		// return complete frame (pRxPacket) or NULL
    		bFragment = TRUE;
    		pRxPacket = RTMPDeFragmentDataFrame(pAd, pRxBlk);
    	}

    	if (pRxPacket)
    	{
			pEntry = &pAd->MacTab.Content[pRxWI->WirelessCliID];

    		// process complete frame
    		if (bFragment && (pRxD->Decrypted) && (pEntry->WepStatus == Ndis802_11Encryption2Enabled))
    		{
				// Minus MIC length
				pRxBlk->DataSize -= 8;

    			// For TKIP frame, calculate the MIC value
    			if (STACheckTkipMICValue(pAd, pEntry, pRxBlk) == FALSE)
    			{
    				return;
    			}
    		}

    		STARxDataFrameAnnounce(pAd, pEntry, pRxBlk, FromWhichBSSID);
			return;
    	}
    	else
    	{
    		// just return
    		// because RTMPDeFragmentDataFrame() will release rx packet,
    		// if packet is fragmented
    		return;
    	}
	}

	ASSERT(0);
	// release packet
	RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
}

VOID STAHandleRxMgmtFrame(
	IN	PRTMP_ADAPTER	pAd,
	IN	RX_BLK			*pRxBlk)
{
	PRT28XX_RXD_STRUC	pRxD = &(pRxBlk->RxD);
	PRXWI_STRUC		pRxWI = pRxBlk->pRxWI;
	PHEADER_802_11	pHeader = pRxBlk->pHeader;
	PNDIS_PACKET	pRxPacket = pRxBlk->pRxPacket;

	do
	{

		// We should collect RSSI not only U2M data but also my beacon
		if ((pHeader->FC.SubType == SUBTYPE_BEACON) && (MAC_ADDR_EQUAL(&pAd->CommonCfg.Bssid, &pHeader->Addr2)))
		{
			Update_Rssi_Sample(pAd, &pAd->StaCfg.RssiSample, pRxWI);

			pAd->StaCfg.LastSNR0 = (UCHAR)(pRxWI->SNR0);
			pAd->StaCfg.LastSNR1 = (UCHAR)(pRxWI->SNR1);
		}

		// First check the size, it MUST not exceed the mlme queue size
		if (pRxWI->MPDUtotalByteCount > MGMT_DMA_BUFFER_SIZE)
		{
			DBGPRINT_ERR(("STAHandleRxMgmtFrame: frame too large, size = %d \n", pRxWI->MPDUtotalByteCount));
			break;
		}

		REPORT_MGMT_FRAME_TO_MLME(pAd, pRxWI->WirelessCliID, pHeader, pRxWI->MPDUtotalByteCount,
									pRxWI->RSSI0, pRxWI->RSSI1, pRxWI->RSSI2, pRxD->PlcpSignal);
	} while (FALSE);

	RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_SUCCESS);
}

VOID STAHandleRxControlFrame(
	IN	PRTMP_ADAPTER	pAd,
	IN	RX_BLK			*pRxBlk)
{
#ifdef DOT11_N_SUPPORT
	PRXWI_STRUC		pRxWI = pRxBlk->pRxWI;
#endif // DOT11_N_SUPPORT //
	PHEADER_802_11	pHeader = pRxBlk->pHeader;
	PNDIS_PACKET	pRxPacket = pRxBlk->pRxPacket;

	switch (pHeader->FC.SubType)
	{
		case SUBTYPE_BLOCK_ACK_REQ:
#ifdef DOT11_N_SUPPORT
			{
				CntlEnqueueForRecv(pAd, pRxWI->WirelessCliID, (pRxWI->MPDUtotalByteCount), (PFRAME_BA_REQ)pHeader);
			}
			break;
#endif // DOT11_N_SUPPORT //
		case SUBTYPE_BLOCK_ACK:
		case SUBTYPE_ACK:
		default:
			break;
	}

	RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
}


/*
	========================================================================

	Routine Description:
		Process RxDone interrupt, running in DPC level

	Arguments:
		pAd Pointer to our adapter

	Return Value:
		None

	IRQL = DISPATCH_LEVEL

	Note:
		This routine has to maintain Rx ring read pointer.
		Need to consider QOS DATA format when converting to 802.3
	========================================================================
*/
BOOLEAN STARxDoneInterruptHandle(
	IN	PRTMP_ADAPTER	pAd,
	IN	BOOLEAN			argc)
{
	NDIS_STATUS			Status;
	UINT32			RxProcessed, RxPending;
	BOOLEAN			bReschedule = FALSE;
	RT28XX_RXD_STRUC	*pRxD;
	UCHAR			*pData;
	PRXWI_STRUC		pRxWI;
	PNDIS_PACKET	pRxPacket;
	PHEADER_802_11	pHeader;
	RX_BLK			RxCell;

	RxProcessed = RxPending = 0;

	// process whole rx ring
	while (1)
	{

		if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_RADIO_OFF |
								fRTMP_ADAPTER_RESET_IN_PROGRESS |
								fRTMP_ADAPTER_HALT_IN_PROGRESS |
								fRTMP_ADAPTER_NIC_NOT_EXIST) ||
			!RTMP_TEST_FLAG(pAd,fRTMP_ADAPTER_START_UP))
		{
			break;
		}

		if (RxProcessed++ > MAX_RX_PROCESS_CNT)
		{
			// need to reschedule rx handle
			bReschedule = TRUE;
			break;
		}

		RxProcessed ++; // test

		// 1. allocate a new data packet into rx ring to replace received packet
		//    then processing the received packet
		// 2. the callee must take charge of release of packet
		// 3. As far as driver is concerned ,
		//    the rx packet must
		//      a. be indicated to upper layer or
		//      b. be released if it is discarded
		pRxPacket = GetPacketFromRxRing(pAd, &(RxCell.RxD), &bReschedule, &RxPending);
		if (pRxPacket == NULL)
		{
			// no more packet to process
			break;
		}

		// get rx ring descriptor
		pRxD = &(RxCell.RxD);
		// get rx data buffer
		pData	= GET_OS_PKT_DATAPTR(pRxPacket);
		pRxWI	= (PRXWI_STRUC) pData;
		pHeader = (PHEADER_802_11) (pData+RXWI_SIZE) ;

#ifdef RT_BIG_ENDIAN
	    RTMPFrameEndianChange(pAd, (PUCHAR)pHeader, DIR_READ, TRUE);
		RTMPWIEndianChange((PUCHAR)pRxWI, TYPE_RXWI);
#endif

		// build RxCell
		RxCell.pRxWI = pRxWI;
		RxCell.pHeader = pHeader;
		RxCell.pRxPacket = pRxPacket;
		RxCell.pData = (UCHAR *) pHeader;
		RxCell.DataSize = pRxWI->MPDUtotalByteCount;
		RxCell.Flags = 0;

		// Increase Total receive byte counter after real data received no mater any error or not
		pAd->RalinkCounters.ReceivedByteCount +=  pRxWI->MPDUtotalByteCount;
		pAd->RalinkCounters.RxCount ++;

		INC_COUNTER64(pAd->WlanCounters.ReceivedFragmentCount);

		if (pRxWI->MPDUtotalByteCount < 14)
			Status = NDIS_STATUS_FAILURE;

        if (MONITOR_ON(pAd))
		{
            send_monitor_packets(pAd, &RxCell);
			break;
		}
		/* RT2870 invokes STARxDoneInterruptHandle() in rtusb_bulk.c */
#ifdef RALINK_ATE
		if (ATE_ON(pAd))
		{
			pAd->ate.RxCntPerSec++;
			ATESampleRssi(pAd, pRxWI);
#ifdef RALINK_28xx_QA
			if (pAd->ate.bQARxStart == TRUE)
			{
				/* (*pRxD) has been swapped in GetPacketFromRxRing() */
				ATE_QA_Statistics(pAd, pRxWI, pRxD,	pHeader);
			}
#endif // RALINK_28xx_QA //
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_SUCCESS);
			continue;
		}
#endif // RALINK_ATE //

		// Check for all RxD errors
		Status = RTMPCheckRxError(pAd, pHeader, pRxWI, pRxD);

		// Handle the received frame
		if (Status == NDIS_STATUS_SUCCESS)
		{
			switch (pHeader->FC.Type)
			{
				// CASE I, receive a DATA frame
				case BTYPE_DATA:
				{
					// process DATA frame
					STAHandleRxDataFrame(pAd, &RxCell);
				}
				break;
				// CASE II, receive a MGMT frame
				case BTYPE_MGMT:
				{
					STAHandleRxMgmtFrame(pAd, &RxCell);
				}
				break;
				// CASE III. receive a CNTL frame
				case BTYPE_CNTL:
				{
					STAHandleRxControlFrame(pAd, &RxCell);
				}
				break;
				// discard other type
				default:
					RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
					break;
			}
		}
		else
		{
			pAd->Counters8023.RxErrors++;
			// discard this frame
			RELEASE_NDIS_PACKET(pAd, pRxPacket, NDIS_STATUS_FAILURE);
		}
	}

	// fRTMP_PS_GO_TO_SLEEP_NOW is set if receiving beacon.
	if (RTMP_TEST_PSFLAG(pAd, fRTMP_PS_GO_TO_SLEEP_NOW) && (INFRA_ON(pAd)))
	{
		RTMP_CLEAR_PSFLAG(pAd, fRTMP_PS_GO_TO_SLEEP_NOW);
		AsicSleepThenAutoWakeup(pAd, pAd->ThisTbttNumToNextWakeUp);
		bReschedule = FALSE;
	}
	return bReschedule;
}

/*
	========================================================================

	Routine Description:
	Arguments:
		pAd 	Pointer to our adapter

	IRQL = DISPATCH_LEVEL

	========================================================================
*/
VOID	RTMPHandleTwakeupInterrupt(
	IN PRTMP_ADAPTER pAd)
{
	AsicForceWakeup(pAd, DOT11POWERSAVE);
}

/*
========================================================================
Routine Description:
    Early checking and OS-depened parsing for Tx packet send to our STA driver.

Arguments:
    NDIS_HANDLE 	MiniportAdapterContext	Pointer refer to the device handle, i.e., the pAd.
	PPNDIS_PACKET	ppPacketArray			The packet array need to do transmission.
	UINT			NumberOfPackets			Number of packet in packet array.

Return Value:
	NONE

Note:
	This function do early checking and classification for send-out packet.
	You only can put OS-depened & STA related code in here.
========================================================================
*/
VOID STASendPackets(
	IN	NDIS_HANDLE		MiniportAdapterContext,
	IN	PPNDIS_PACKET	ppPacketArray,
	IN	UINT			NumberOfPackets)
{
	UINT			Index;
	PRTMP_ADAPTER	pAd = (PRTMP_ADAPTER) MiniportAdapterContext;
	PNDIS_PACKET	pPacket;
	BOOLEAN			allowToSend = FALSE;


	for (Index = 0; Index < NumberOfPackets; Index++)
	{
		pPacket = ppPacketArray[Index];

		do
		{
			if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_RESET_IN_PROGRESS) ||
				RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS) ||
				RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_RADIO_OFF))
			{
				// Drop send request since hardware is in reset state
					break;
			}
			else if (!INFRA_ON(pAd) && !ADHOC_ON(pAd))
			{
				// Drop send request since there are no physical connection yet
					break;
			}
			else
			{
				// Record that orignal packet source is from NDIS layer,so that
				// later on driver knows how to release this NDIS PACKET
#ifdef QOS_DLS_SUPPORT
				MAC_TABLE_ENTRY *pEntry;
				PUCHAR pSrcBufVA = GET_OS_PKT_DATAPTR(pPacket);

				pEntry = MacTableLookup(pAd, pSrcBufVA);
				if (pEntry && (pEntry->ValidAsDls == TRUE))
				{
					RTMP_SET_PACKET_WCID(pPacket, pEntry->Aid);
				}
				else
#endif // QOS_DLS_SUPPORT //
				RTMP_SET_PACKET_WCID(pPacket, 0); // this field is useless when in STA mode
				RTMP_SET_PACKET_SOURCE(pPacket, PKTSRC_NDIS);
				NDIS_SET_PACKET_STATUS(pPacket, NDIS_STATUS_PENDING);
				pAd->RalinkCounters.PendingNdisPacketCount++;

				allowToSend = TRUE;
			}
		} while(FALSE);

		if (allowToSend == TRUE)
			STASendPacket(pAd, pPacket);
		else
			RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
	}

	// Dequeue outgoing frames from TxSwQueue[] and process it
	RTMPDeQueuePacket(pAd, FALSE, NUM_OF_TX_RING, MAX_TX_PROCESS);

}


/*
========================================================================
Routine Description:
	This routine is used to do packet parsing and classification for Tx packet
	to STA device, and it will en-queue packets to our TxSwQueue depends on AC
	class.

Arguments:
	pAd    		Pointer to our adapter
	pPacket 	Pointer to send packet

Return Value:
	NDIS_STATUS_SUCCESS			If succes to queue the packet into TxSwQueue.
	NDIS_STATUS_FAILURE			If failed to do en-queue.

Note:
	You only can put OS-indepened & STA related code in here.
========================================================================
*/
NDIS_STATUS STASendPacket(
	IN	PRTMP_ADAPTER	pAd,
	IN	PNDIS_PACKET	pPacket)
{
	PACKET_INFO 	PacketInfo;
	PUCHAR			pSrcBufVA;
	UINT			SrcBufLen;
	UINT			AllowFragSize;
	UCHAR			NumberOfFrag;
	UCHAR			QueIdx, UserPriority;
	MAC_TABLE_ENTRY *pEntry = NULL;
	unsigned int 	IrqFlags;
	UCHAR			FlgIsIP = 0;
	UCHAR			Rate;

	// Prepare packet information structure for buffer descriptor
	// chained within a single NDIS packet.
	RTMP_QueryPacketInfo(pPacket, &PacketInfo, &pSrcBufVA, &SrcBufLen);

	if (pSrcBufVA == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR,("STASendPacket --> pSrcBufVA == NULL !!!SrcBufLen=%x\n",SrcBufLen));
		// Resourece is low, system did not allocate virtual address
		// return NDIS_STATUS_FAILURE directly to upper layer
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
		return NDIS_STATUS_FAILURE;
	}


	if (SrcBufLen < 14)
	{
		DBGPRINT(RT_DEBUG_ERROR,("STASendPacket --> Ndis Packet buffer error !!!\n"));
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
		return (NDIS_STATUS_FAILURE);
	}

	// In HT rate adhoc mode, A-MPDU is often used. So need to lookup BA Table and MAC Entry.
	// Note multicast packets in adhoc also use BSSID_WCID index.
	{
		if(INFRA_ON(pAd))
		{
#ifdef QOS_DLS_SUPPORT
			USHORT	tmpWcid;

			tmpWcid = RTMP_GET_PACKET_WCID(pPacket);
			if (VALID_WCID(tmpWcid) &&
				(pAd->MacTab.Content[tmpWcid].ValidAsDls== TRUE))
			{
				pEntry = &pAd->MacTab.Content[tmpWcid];
				Rate = pAd->MacTab.Content[tmpWcid].CurrTxRate;
			}
			else
#endif // QOS_DLS_SUPPORT //
			{
			pEntry = &pAd->MacTab.Content[BSSID_WCID];
			RTMP_SET_PACKET_WCID(pPacket, BSSID_WCID);
			Rate = pAd->CommonCfg.TxRate;
		}
		}
		else if (ADHOC_ON(pAd))
		{
			if (*pSrcBufVA & 0x01)
			{
				RTMP_SET_PACKET_WCID(pPacket, MCAST_WCID);
				pEntry = &pAd->MacTab.Content[MCAST_WCID];
			}
			else
			{
				pEntry = MacTableLookup(pAd, pSrcBufVA);
			}
			Rate = pAd->CommonCfg.TxRate;
		}
	}

	if (!pEntry)
	{
		DBGPRINT(RT_DEBUG_ERROR,("STASendPacket->Cannot find pEntry(%2x:%2x:%2x:%2x:%2x:%2x) in MacTab!\n", PRINT_MAC(pSrcBufVA)));
		// Resourece is low, system did not allocate virtual address
		// return NDIS_STATUS_FAILURE directly to upper layer
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
		return NDIS_STATUS_FAILURE;
	}

	if (ADHOC_ON(pAd)
		)
	{
		RTMP_SET_PACKET_WCID(pPacket, (UCHAR)pEntry->Aid);
	}

	//
	// Check the Ethernet Frame type of this packet, and set the RTMP_SET_PACKET_SPECIFIC flags.
	//		Here we set the PACKET_SPECIFIC flags(LLC, VLAN, DHCP/ARP, EAPOL).
	RTMPCheckEtherType(pAd, pPacket);



	//
	// WPA 802.1x secured port control - drop all non-802.1x frame before port secured
	//
	if (((pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA) ||
		 (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPAPSK) ||
		 (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA2) ||
		 (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA2PSK)
#ifdef WPA_SUPPLICANT_SUPPORT
		  || (pAd->StaCfg.IEEE8021X == TRUE)
#endif // WPA_SUPPLICANT_SUPPORT //
#ifdef LEAP_SUPPORT
		  || (pAd->StaCfg.LeapAuthMode == CISCO_AuthModeLEAP)
#endif // LEAP_SUPPORT //
		  )
		  && ((pAd->StaCfg.PortSecured == WPA_802_1X_PORT_NOT_SECURED) || (pAd->StaCfg.MicErrCnt >= 2))
		  && (RTMP_GET_PACKET_EAPOL(pPacket)== FALSE)
		  )
	{
		DBGPRINT(RT_DEBUG_TRACE,("STASendPacket --> Drop packet before port secured !!!\n"));
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);

		return (NDIS_STATUS_FAILURE);
	}


	// STEP 1. Decide number of fragments required to deliver this MSDU.
	//	   The estimation here is not very accurate because difficult to
	//	   take encryption overhead into consideration here. The result
	//	   "NumberOfFrag" is then just used to pre-check if enough free
	//	   TXD are available to hold this MSDU.


	if (*pSrcBufVA & 0x01)	// fragmentation not allowed on multicast & broadcast
		NumberOfFrag = 1;
	else if (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_AGGREGATION_INUSED))
		NumberOfFrag = 1;	// Aggregation overwhelms fragmentation
	else if (CLIENT_STATUS_TEST_FLAG(pEntry, fCLIENT_STATUS_AMSDU_INUSED))
		NumberOfFrag = 1;	// Aggregation overwhelms fragmentation
#ifdef DOT11_N_SUPPORT
	else if ((pAd->StaCfg.HTPhyMode.field.MODE == MODE_HTMIX) || (pAd->StaCfg.HTPhyMode.field.MODE == MODE_HTGREENFIELD))
		NumberOfFrag = 1;	// MIMO RATE overwhelms fragmentation
#endif // DOT11_N_SUPPORT //
	else
	{
		// The calculated "NumberOfFrag" is a rough estimation because of various
		// encryption/encapsulation overhead not taken into consideration. This number is just
		// used to make sure enough free TXD are available before fragmentation takes place.
		// In case the actual required number of fragments of an NDIS packet
		// excceeds "NumberOfFrag"caculated here and not enough free TXD available, the
		// last fragment (i.e. last MPDU) will be dropped in RTMPHardTransmit() due to out of
		// resource, and the NDIS packet will be indicated NDIS_STATUS_FAILURE. This should
		// rarely happen and the penalty is just like a TX RETRY fail. Affordable.

		AllowFragSize = (pAd->CommonCfg.FragmentThreshold) - LENGTH_802_11 - LENGTH_CRC;
		NumberOfFrag = ((PacketInfo.TotalPacketLength - LENGTH_802_3 + LENGTH_802_1_H) / AllowFragSize) + 1;
		// To get accurate number of fragmentation, Minus 1 if the size just match to allowable fragment size
		if (((PacketInfo.TotalPacketLength - LENGTH_802_3 + LENGTH_802_1_H) % AllowFragSize) == 0)
		{
			NumberOfFrag--;
		}
	}

	// Save fragment number to Ndis packet reserved field
	RTMP_SET_PACKET_FRAGMENTS(pPacket, NumberOfFrag);


	// STEP 2. Check the requirement of RTS:
	//	   If multiple fragment required, RTS is required only for the first fragment
	//	   if the fragment size large than RTS threshold
	//     For RT28xx, Let ASIC send RTS/CTS
	RTMP_SET_PACKET_RTS(pPacket, 0);
	RTMP_SET_PACKET_TXRATE(pPacket, pAd->CommonCfg.TxRate);

	//
	// STEP 3. Traffic classification. outcome = <UserPriority, QueIdx>
	//
	UserPriority = 0;
	QueIdx		 = QID_AC_BE;
	if (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_WMM_INUSED))
	{
		USHORT Protocol;
		UCHAR  LlcSnapLen = 0, Byte0, Byte1;
		do
		{
			// get Ethernet protocol field
			Protocol = (USHORT)((pSrcBufVA[12] << 8) + pSrcBufVA[13]);
			if (Protocol <= 1500)
			{
				// get Ethernet protocol field from LLC/SNAP
				if (Sniff2BytesFromNdisBuffer(PacketInfo.pFirstBuffer, LENGTH_802_3 + 6, &Byte0, &Byte1) != NDIS_STATUS_SUCCESS)
					break;

				Protocol = (USHORT)((Byte0 << 8) + Byte1);
				LlcSnapLen = 8;
			}

			// always AC_BE for non-IP packet
			if (Protocol != 0x0800)
				break;

			// get IP header
			if (Sniff2BytesFromNdisBuffer(PacketInfo.pFirstBuffer, LENGTH_802_3 + LlcSnapLen, &Byte0, &Byte1) != NDIS_STATUS_SUCCESS)
				break;

			// return AC_BE if packet is not IPv4
			if ((Byte0 & 0xf0) != 0x40)
				break;

			FlgIsIP = 1;
			UserPriority = (Byte1 & 0xe0) >> 5;
			QueIdx = MapUserPriorityToAccessCategory[UserPriority];

			// TODO: have to check ACM bit. apply TSPEC if ACM is ON
			// TODO: downgrade UP & QueIdx before passing ACM
			if (pAd->CommonCfg.APEdcaParm.bACM[QueIdx])
			{
				UserPriority = 0;
				QueIdx		 = QID_AC_BE;
			}
		} while (FALSE);
	}

	RTMP_SET_PACKET_UP(pPacket, UserPriority);



	// Make sure SendTxWait queue resource won't be used by other threads
	RTMP_IRQ_LOCK(&pAd->irq_lock, IrqFlags);
	if (pAd->TxSwQueue[QueIdx].Number >= MAX_PACKETS_IN_QUEUE)
	{
		RTMP_IRQ_UNLOCK(&pAd->irq_lock, IrqFlags);
#ifdef BLOCK_NET_IF
		StopNetIfQueue(pAd, QueIdx, pPacket);
#endif // BLOCK_NET_IF //
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);

		return NDIS_STATUS_FAILURE;
	}
	else
	{
		InsertTailQueue(&pAd->TxSwQueue[QueIdx], PACKET_TO_QUEUE_ENTRY(pPacket));
	}
	RTMP_IRQ_UNLOCK(&pAd->irq_lock, IrqFlags);

#ifdef DOT11_N_SUPPORT
    if ((pAd->CommonCfg.BACapability.field.AutoBA == TRUE)&&
        (pAd->StaActive.SupportedPhyInfo.bHtEnable == TRUE))
	{
		if (((pEntry->TXBAbitmap & (1<<UserPriority)) == 0) &&
            ((pEntry->BADeclineBitmap & (1<<UserPriority)) == 0) &&
            (pEntry->PortSecured == WPA_802_1X_PORT_SECURED)
			 // For IOT compatibility, if
			 // 1. It is Ralink chip or
			 // 2. It is OPEN or AES mode,
			 // then BA session can be bulit.
			 && ((pEntry->ValidAsCLI && pAd->MlmeAux.APRalinkIe != 0x0) ||
			 	 (pEntry->WepStatus == Ndis802_11WEPDisabled || pEntry->WepStatus == Ndis802_11Encryption3Enabled))
			)
		{
			BAOriSessionSetUp(pAd, pEntry, 0, 0, 10, FALSE);
		}
	}
#endif // DOT11_N_SUPPORT //

	pAd->RalinkCounters.OneSecOsTxCount[QueIdx]++; // TODO: for debug only. to be removed
	return NDIS_STATUS_SUCCESS;
}


/*
	========================================================================

	Routine Description:
		This subroutine will scan through releative ring descriptor to find
		out avaliable free ring descriptor and compare with request size.

	Arguments:
		pAd Pointer to our adapter
		QueIdx		Selected TX Ring

	Return Value:
		NDIS_STATUS_FAILURE 	Not enough free descriptor
		NDIS_STATUS_SUCCESS 	Enough free descriptor

	IRQL = PASSIVE_LEVEL
	IRQL = DISPATCH_LEVEL

	Note:

	========================================================================
*/
NDIS_STATUS RTMPFreeTXDRequest(
	IN		PRTMP_ADAPTER	pAd,
	IN		UCHAR			QueIdx,
	IN		UCHAR			NumberRequired,
	IN		PUCHAR			FreeNumberIs)
{
	ULONG		FreeNumber = 0;
	NDIS_STATUS 	Status = NDIS_STATUS_FAILURE;

	switch (QueIdx)
	{
		case QID_AC_BK:
		case QID_AC_BE:
		case QID_AC_VI:
		case QID_AC_VO:
		case QID_HCCA:
			if (pAd->TxRing[QueIdx].TxSwFreeIdx > pAd->TxRing[QueIdx].TxCpuIdx)
				FreeNumber = pAd->TxRing[QueIdx].TxSwFreeIdx - pAd->TxRing[QueIdx].TxCpuIdx - 1;
			else
				FreeNumber = pAd->TxRing[QueIdx].TxSwFreeIdx + TX_RING_SIZE - pAd->TxRing[QueIdx].TxCpuIdx - 1;

			if (FreeNumber >= NumberRequired)
				Status = NDIS_STATUS_SUCCESS;
			break;

		case QID_MGMT:
			if (pAd->MgmtRing.TxSwFreeIdx > pAd->MgmtRing.TxCpuIdx)
				FreeNumber = pAd->MgmtRing.TxSwFreeIdx - pAd->MgmtRing.TxCpuIdx - 1;
			else
				FreeNumber = pAd->MgmtRing.TxSwFreeIdx + MGMT_RING_SIZE - pAd->MgmtRing.TxCpuIdx - 1;

			if (FreeNumber >= NumberRequired)
				Status = NDIS_STATUS_SUCCESS;
			break;

		default:
			DBGPRINT(RT_DEBUG_ERROR,("RTMPFreeTXDRequest::Invalid QueIdx(=%d)\n", QueIdx));
			break;
	}
	*FreeNumberIs = (UCHAR)FreeNumber;

	return (Status);
}



VOID RTMPSendDisassociationFrame(
	IN	PRTMP_ADAPTER	pAd)
{
}

VOID	RTMPSendNullFrame(
	IN	PRTMP_ADAPTER	pAd,
	IN	UCHAR			TxRate,
	IN	BOOLEAN 		bQosNull)
{
	UCHAR	NullFrame[48];
	ULONG	Length;
	PHEADER_802_11	pHeader_802_11;


#ifdef RALINK_ATE
	if(ATE_ON(pAd))
	{
		return;
	}
#endif // RALINK_ATE //

    // WPA 802.1x secured port control
    if (((pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA) ||
         (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPAPSK) ||
         (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA2) ||
         (pAd->StaCfg.AuthMode == Ndis802_11AuthModeWPA2PSK)
#ifdef WPA_SUPPLICANT_SUPPORT
			  || (pAd->StaCfg.IEEE8021X == TRUE)
#endif
        ) &&
       (pAd->StaCfg.PortSecured == WPA_802_1X_PORT_NOT_SECURED))
	{
		return;
	}

	NdisZeroMemory(NullFrame, 48);
	Length = sizeof(HEADER_802_11);

	pHeader_802_11 = (PHEADER_802_11) NullFrame;

	pHeader_802_11->FC.Type = BTYPE_DATA;
	pHeader_802_11->FC.SubType = SUBTYPE_NULL_FUNC;
	pHeader_802_11->FC.ToDs = 1;
	COPY_MAC_ADDR(pHeader_802_11->Addr1, pAd->CommonCfg.Bssid);
	COPY_MAC_ADDR(pHeader_802_11->Addr2, pAd->CurrentAddress);
	COPY_MAC_ADDR(pHeader_802_11->Addr3, pAd->CommonCfg.Bssid);

	if (pAd->CommonCfg.bAPSDForcePowerSave)
	{
		pHeader_802_11->FC.PwrMgmt = PWR_SAVE;
	}
	else
	{
		pHeader_802_11->FC.PwrMgmt = (pAd->StaCfg.Psm == PWR_SAVE) ? 1: 0;
	}
	pHeader_802_11->Duration = pAd->CommonCfg.Dsifs + RTMPCalcDuration(pAd, TxRate, 14);

	pAd->Sequence++;
	pHeader_802_11->Sequence = pAd->Sequence;

	// Prepare QosNull function frame
	if (bQosNull)
	{
		pHeader_802_11->FC.SubType = SUBTYPE_QOS_NULL;

		// copy QOS control bytes
		NullFrame[Length]	=  0;
		NullFrame[Length+1] =  0;
		Length += 2;// if pad with 2 bytes for alignment, APSD will fail
	}

	HAL_KickOutNullFrameTx(pAd, 0, NullFrame, Length);

}

// IRQL = DISPATCH_LEVEL
VOID	RTMPSendRTSFrame(
	IN	PRTMP_ADAPTER	pAd,
	IN	PUCHAR			pDA,
	IN	unsigned int	NextMpduSize,
	IN	UCHAR			TxRate,
	IN	UCHAR			RTSRate,
	IN	USHORT			AckDuration,
	IN	UCHAR			QueIdx,
	IN	UCHAR			FrameGap)
{
}



// --------------------------------------------------------
//  FIND ENCRYPT KEY AND DECIDE CIPHER ALGORITHM
//		Find the WPA key, either Group or Pairwise Key
//		LEAP + TKIP also use WPA key.
// --------------------------------------------------------
// Decide WEP bit and cipher suite to be used. Same cipher suite should be used for whole fragment burst
// In Cisco CCX 2.0 Leap Authentication
//		   WepStatus is Ndis802_11Encryption1Enabled but the key will use PairwiseKey
//		   Instead of the SharedKey, SharedKey Length may be Zero.
VOID STAFindCipherAlgorithm(
	IN	PRTMP_ADAPTER	pAd,
	IN	TX_BLK			*pTxBlk)
{
	NDIS_802_11_ENCRYPTION_STATUS	Cipher;				// To indicate cipher used for this packet
	UCHAR							CipherAlg = CIPHER_NONE;		// cipher alogrithm
	UCHAR							KeyIdx = 0xff;
	PUCHAR							pSrcBufVA;
	PCIPHER_KEY						pKey = NULL;

	pSrcBufVA = GET_OS_PKT_DATAPTR(pTxBlk->pPacket);

	{
	    // Select Cipher
	    if ((*pSrcBufVA & 0x01) && (ADHOC_ON(pAd)))
	        Cipher = pAd->StaCfg.GroupCipher; // Cipher for Multicast or Broadcast
	    else
	        Cipher = pAd->StaCfg.PairCipher; // Cipher for Unicast

		if (RTMP_GET_PACKET_EAPOL(pTxBlk->pPacket))
		{
			ASSERT(pAd->SharedKey[BSS0][0].CipherAlg <= CIPHER_CKIP128);

			// 4-way handshaking frame must be clear
			if (!(TX_BLK_TEST_FLAG(pTxBlk, fTX_bClearEAPFrame)) && (pAd->SharedKey[BSS0][0].CipherAlg) &&
				(pAd->SharedKey[BSS0][0].KeyLen))
			{
				CipherAlg = pAd->SharedKey[BSS0][0].CipherAlg;
				KeyIdx = 0;
			}
		}
		else if (Cipher == Ndis802_11Encryption1Enabled)
		{
#ifdef LEAP_SUPPORT
			if (pAd->StaCfg.CkipFlag & 0x10) // Cisco CKIP KP is on
			{
				if (LEAP_CCKM_ON(pAd))
				{
					if (((*pSrcBufVA & 0x01) && (ADHOC_ON(pAd))))
						KeyIdx = 1;
					else
						KeyIdx = 0;
				}
				else
					KeyIdx = pAd->StaCfg.DefaultKeyId;
			}
			else if (pAd->StaCfg.CkipFlag & 0x08) // only CKIP CMIC
				KeyIdx = pAd->StaCfg.DefaultKeyId;
			else if (LEAP_CCKM_ON(pAd))
			{
				if ((*pSrcBufVA & 0x01) && (ADHOC_ON(pAd)))
					KeyIdx = 1;
				else
					KeyIdx = 0;
			}
			else	// standard WEP64 or WEP128
#endif // LEAP_SUPPORT //
				KeyIdx = pAd->StaCfg.DefaultKeyId;
		}
		else if ((Cipher == Ndis802_11Encryption2Enabled) ||
				 (Cipher == Ndis802_11Encryption3Enabled))
		{
			if ((*pSrcBufVA & 0x01) && (ADHOC_ON(pAd))) // multicast
				KeyIdx = pAd->StaCfg.DefaultKeyId;
			else if (pAd->SharedKey[BSS0][0].KeyLen)
				KeyIdx = 0;
			else
				KeyIdx = pAd->StaCfg.DefaultKeyId;
		}

		if (KeyIdx == 0xff)
			CipherAlg = CIPHER_NONE;
		else if ((Cipher == Ndis802_11EncryptionDisabled) || (pAd->SharedKey[BSS0][KeyIdx].KeyLen == 0))
			CipherAlg = CIPHER_NONE;
#ifdef WPA_SUPPLICANT_SUPPORT
	    else if ( pAd->StaCfg.WpaSupplicantUP &&
	             (Cipher == Ndis802_11Encryption1Enabled) &&
	             (pAd->StaCfg.IEEE8021X == TRUE) &&
	             (pAd->StaCfg.PortSecured == WPA_802_1X_PORT_NOT_SECURED))
	        CipherAlg = CIPHER_NONE;
#endif // WPA_SUPPLICANT_SUPPORT //
		else
		{
			//Header_802_11.FC.Wep = 1;
			CipherAlg = pAd->SharedKey[BSS0][KeyIdx].CipherAlg;
			pKey = &pAd->SharedKey[BSS0][KeyIdx];
		}
	}

	pTxBlk->CipherAlg = CipherAlg;
	pTxBlk->pKey = pKey;
}


VOID STABuildCommon802_11Header(
	IN  PRTMP_ADAPTER   pAd,
	IN  TX_BLK          *pTxBlk)
{

	HEADER_802_11	*pHeader_802_11;
#ifdef QOS_DLS_SUPPORT
	BOOLEAN	bDLSFrame = FALSE;
	INT	DlsEntryIndex = 0;
#endif // QOS_DLS_SUPPORT //

	//
	// MAKE A COMMON 802.11 HEADER
	//

	// normal wlan header size : 24 octets
	pTxBlk->MpduHeaderLen = sizeof(HEADER_802_11);

	pHeader_802_11 = (HEADER_802_11 *) &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];

	NdisZeroMemory(pHeader_802_11, sizeof(HEADER_802_11));

	pHeader_802_11->FC.FrDs = 0;
	pHeader_802_11->FC.Type = BTYPE_DATA;
	pHeader_802_11->FC.SubType = ((TX_BLK_TEST_FLAG(pTxBlk, fTX_bWMM)) ? SUBTYPE_QDATA : SUBTYPE_DATA);

#ifdef QOS_DLS_SUPPORT
	if (INFRA_ON(pAd))
	{
		// Check if the frame can be sent through DLS direct link interface
		// If packet can be sent through DLS, then force aggregation disable. (Hard to determine peer STA's capability)
		DlsEntryIndex = RTMPCheckDLSFrame(pAd, pTxBlk->pSrcBufHeader);
		if (DlsEntryIndex >= 0)
			bDLSFrame = TRUE;
		else
			bDLSFrame = FALSE;
	}
#endif // QOS_DLS_SUPPORT //

    if (pTxBlk->pMacEntry)
	{
		if (TX_BLK_TEST_FLAG(pTxBlk, fTX_bForceNonQoS))
		{
			pHeader_802_11->Sequence = pTxBlk->pMacEntry->NonQosDataSeq;
			pTxBlk->pMacEntry->NonQosDataSeq = (pTxBlk->pMacEntry->NonQosDataSeq+1) & MAXSEQ;
		}
		else
		{
#ifdef QOS_DLS_SUPPORT
			if (bDLSFrame)
			{
				pHeader_802_11->Sequence = pAd->StaCfg.DLSEntry[DlsEntryIndex].Sequence;
				pAd->StaCfg.DLSEntry[DlsEntryIndex].Sequence = (pAd->StaCfg.DLSEntry[DlsEntryIndex].Sequence+1) & MAXSEQ;
			}
			else
#endif // QOS_DLS_SUPPORT //
			{
    	    pHeader_802_11->Sequence = pTxBlk->pMacEntry->TxSeq[pTxBlk->UserPriority];
    	    pTxBlk->pMacEntry->TxSeq[pTxBlk->UserPriority] = (pTxBlk->pMacEntry->TxSeq[pTxBlk->UserPriority]+1) & MAXSEQ;
    	}
	}
	}
	else
	{
		pHeader_802_11->Sequence = pAd->Sequence;
		pAd->Sequence = (pAd->Sequence+1) & MAXSEQ; // next sequence
	}

	pHeader_802_11->Frag = 0;

	pHeader_802_11->FC.MoreData = TX_BLK_TEST_FLAG(pTxBlk, fTX_bMoreData);

	{
		if (INFRA_ON(pAd))
		{
#ifdef QOS_DLS_SUPPORT
			if (bDLSFrame)
			{
				COPY_MAC_ADDR(pHeader_802_11->Addr1, pTxBlk->pSrcBufHeader);
				COPY_MAC_ADDR(pHeader_802_11->Addr2, pAd->CurrentAddress);
				COPY_MAC_ADDR(pHeader_802_11->Addr3, pAd->CommonCfg.Bssid);
				pHeader_802_11->FC.ToDs = 0;
			}
			else
#endif // QOS_DLS_SUPPORT //
			{
			COPY_MAC_ADDR(pHeader_802_11->Addr1, pAd->CommonCfg.Bssid);
			COPY_MAC_ADDR(pHeader_802_11->Addr2, pAd->CurrentAddress);
			COPY_MAC_ADDR(pHeader_802_11->Addr3, pTxBlk->pSrcBufHeader);
			pHeader_802_11->FC.ToDs = 1;
		}
		}
		else if (ADHOC_ON(pAd))
		{
			COPY_MAC_ADDR(pHeader_802_11->Addr1, pTxBlk->pSrcBufHeader);
			COPY_MAC_ADDR(pHeader_802_11->Addr2, pAd->CurrentAddress);
			COPY_MAC_ADDR(pHeader_802_11->Addr3, pAd->CommonCfg.Bssid);
			pHeader_802_11->FC.ToDs = 0;
		}
	}

	if (pTxBlk->CipherAlg != CIPHER_NONE)
		pHeader_802_11->FC.Wep = 1;

	// -----------------------------------------------------------------
	// STEP 2. MAKE A COMMON 802.11 HEADER SHARED BY ENTIRE FRAGMENT BURST. Fill sequence later.
	// -----------------------------------------------------------------
	if (pAd->CommonCfg.bAPSDForcePowerSave)
    	pHeader_802_11->FC.PwrMgmt = PWR_SAVE;
	else
    	pHeader_802_11->FC.PwrMgmt = (pAd->StaCfg.Psm == PWR_SAVE);
}

#ifdef DOT11_N_SUPPORT
VOID STABuildCache802_11Header(
	IN RTMP_ADAPTER		*pAd,
	IN TX_BLK			*pTxBlk,
	IN UCHAR			*pHeader)
{
	MAC_TABLE_ENTRY	*pMacEntry;
	PHEADER_802_11	pHeader80211;

	pHeader80211 = (PHEADER_802_11)pHeader;
	pMacEntry = pTxBlk->pMacEntry;

	//
	// Update the cached 802.11 HEADER
	//

	// normal wlan header size : 24 octets
	pTxBlk->MpduHeaderLen = sizeof(HEADER_802_11);

	// More Bit
	pHeader80211->FC.MoreData = TX_BLK_TEST_FLAG(pTxBlk, fTX_bMoreData);

	// Sequence
	pHeader80211->Sequence = pMacEntry->TxSeq[pTxBlk->UserPriority];
    pMacEntry->TxSeq[pTxBlk->UserPriority] = (pMacEntry->TxSeq[pTxBlk->UserPriority]+1) & MAXSEQ;

	{
		// Check if the frame can be sent through DLS direct link interface
		// If packet can be sent through DLS, then force aggregation disable. (Hard to determine peer STA's capability)
#ifdef QOS_DLS_SUPPORT
		BOOLEAN	bDLSFrame = FALSE;
		INT	DlsEntryIndex = 0;

		DlsEntryIndex = RTMPCheckDLSFrame(pAd, pTxBlk->pSrcBufHeader);
		if (DlsEntryIndex >= 0)
			bDLSFrame = TRUE;
		else
			bDLSFrame = FALSE;
#endif // QOS_DLS_SUPPORT //

		// The addr3 of normal packet send from DS is Dest Mac address.
#ifdef QOS_DLS_SUPPORT
		if (bDLSFrame)
		{
			COPY_MAC_ADDR(pHeader80211->Addr1, pTxBlk->pSrcBufHeader);
			COPY_MAC_ADDR(pHeader80211->Addr3, pAd->CommonCfg.Bssid);
			pHeader80211->FC.ToDs = 0;
		}
		else
#endif // QOS_DLS_SUPPORT //
		if (ADHOC_ON(pAd))
			COPY_MAC_ADDR(pHeader80211->Addr3, pAd->CommonCfg.Bssid);
		else
			COPY_MAC_ADDR(pHeader80211->Addr3, pTxBlk->pSrcBufHeader);
	}

	// -----------------------------------------------------------------
	// STEP 2. MAKE A COMMON 802.11 HEADER SHARED BY ENTIRE FRAGMENT BURST. Fill sequence later.
	// -----------------------------------------------------------------
	if (pAd->CommonCfg.bAPSDForcePowerSave)
    	pHeader80211->FC.PwrMgmt = PWR_SAVE;
	else
    	pHeader80211->FC.PwrMgmt = (pAd->StaCfg.Psm == PWR_SAVE);
}
#endif // DOT11_N_SUPPORT //

static inline PUCHAR STA_Build_ARalink_Frame_Header(
	IN RTMP_ADAPTER *pAd,
	IN TX_BLK		*pTxBlk)
{
	PUCHAR			pHeaderBufPtr;
	HEADER_802_11	*pHeader_802_11;
	PNDIS_PACKET	pNextPacket;
	UINT32			nextBufLen;
	PQUEUE_ENTRY	pQEntry;

	STAFindCipherAlgorithm(pAd, pTxBlk);
	STABuildCommon802_11Header(pAd, pTxBlk);


	pHeaderBufPtr = &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];
	pHeader_802_11 = (HEADER_802_11 *) pHeaderBufPtr;

	// steal "order" bit to mark "aggregation"
	pHeader_802_11->FC.Order = 1;

	// skip common header
	pHeaderBufPtr += pTxBlk->MpduHeaderLen;

	if (TX_BLK_TEST_FLAG(pTxBlk, fTX_bWMM))
	{
		//
		// build QOS Control bytes
		//
		*pHeaderBufPtr = (pTxBlk->UserPriority & 0x0F);

		*(pHeaderBufPtr+1) = 0;
		pHeaderBufPtr +=2;
		pTxBlk->MpduHeaderLen += 2;
	}

	// padding at front of LLC header. LLC header should at 4-bytes aligment.
	pTxBlk->HdrPadLen = (ULONG)pHeaderBufPtr;
	pHeaderBufPtr = (PCHAR)ROUND_UP(pHeaderBufPtr, 4);
	pTxBlk->HdrPadLen = (ULONG)(pHeaderBufPtr - pTxBlk->HdrPadLen);

	// For RA Aggregation,
	// put the 2nd MSDU length(extra 2-byte field) after QOS_CONTROL in little endian format
	pQEntry = pTxBlk->TxPacketList.Head;
	pNextPacket = QUEUE_ENTRY_TO_PKT(pQEntry);
	nextBufLen = GET_OS_PKT_LEN(pNextPacket);
	if (RTMP_GET_PACKET_VLAN(pNextPacket))
		nextBufLen -= LENGTH_802_1Q;

	*pHeaderBufPtr = (UCHAR)nextBufLen & 0xff;
	*(pHeaderBufPtr+1) = (UCHAR)(nextBufLen >> 8);

	pHeaderBufPtr += 2;
	pTxBlk->MpduHeaderLen += 2;

	return pHeaderBufPtr;

}

#ifdef DOT11_N_SUPPORT
static inline PUCHAR STA_Build_AMSDU_Frame_Header(
	IN RTMP_ADAPTER *pAd,
	IN TX_BLK		*pTxBlk)
{
	PUCHAR			pHeaderBufPtr;//, pSaveBufPtr;
	HEADER_802_11	*pHeader_802_11;


	STAFindCipherAlgorithm(pAd, pTxBlk);
	STABuildCommon802_11Header(pAd, pTxBlk);

	pHeaderBufPtr = &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];
	pHeader_802_11 = (HEADER_802_11 *) pHeaderBufPtr;

	// skip common header
	pHeaderBufPtr += pTxBlk->MpduHeaderLen;

	//
	// build QOS Control bytes
	//
	*pHeaderBufPtr = (pTxBlk->UserPriority & 0x0F);

	//
	// A-MSDU packet
	//
	*pHeaderBufPtr |= 0x80;

	*(pHeaderBufPtr+1) = 0;
	pHeaderBufPtr +=2;
	pTxBlk->MpduHeaderLen += 2;

	//pSaveBufPtr = pHeaderBufPtr;

	//
	// padding at front of LLC header
	// LLC header should locate at 4-octets aligment
	//
	// @@@ MpduHeaderLen excluding padding @@@
	//
	pTxBlk->HdrPadLen = (ULONG)pHeaderBufPtr;
	pHeaderBufPtr = (PCHAR) ROUND_UP(pHeaderBufPtr, 4);
	pTxBlk->HdrPadLen = (ULONG)(pHeaderBufPtr - pTxBlk->HdrPadLen);

	return pHeaderBufPtr;

}


VOID STA_AMPDU_Frame_Tx(
	IN	PRTMP_ADAPTER	pAd,
	IN	TX_BLK			*pTxBlk)
{
	HEADER_802_11	*pHeader_802_11;
	PUCHAR			pHeaderBufPtr;
	USHORT			FreeNumber;
	MAC_TABLE_ENTRY	*pMacEntry;
	BOOLEAN			bVLANPkt;
	PQUEUE_ENTRY	pQEntry;

	ASSERT(pTxBlk);

	while(pTxBlk->TxPacketList.Head)
	{
		pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
		pTxBlk->pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);
		if ( RTMP_FillTxBlkInfo(pAd, pTxBlk) != TRUE)
		{
			RELEASE_NDIS_PACKET(pAd, pTxBlk->pPacket, NDIS_STATUS_FAILURE);
			continue;
		}

		bVLANPkt = (RTMP_GET_PACKET_VLAN(pTxBlk->pPacket) ? TRUE : FALSE);

		pMacEntry = pTxBlk->pMacEntry;
		if (pMacEntry->isCached)
		{
			// NOTE: Please make sure the size of pMacEntry->CachedBuf[] is smaller than pTxBlk->HeaderBuf[]!!!!
			NdisMoveMemory((PUCHAR)&pTxBlk->HeaderBuf[TXINFO_SIZE], (PUCHAR)&pMacEntry->CachedBuf[0], TXWI_SIZE + sizeof(HEADER_802_11));
			pHeaderBufPtr = (PUCHAR)(&pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE]);
			STABuildCache802_11Header(pAd, pTxBlk, pHeaderBufPtr);
		}
		else
		{
			STAFindCipherAlgorithm(pAd, pTxBlk);
			STABuildCommon802_11Header(pAd, pTxBlk);

			pHeaderBufPtr = &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];
		}


		pHeader_802_11 = (HEADER_802_11 *) pHeaderBufPtr;

		// skip common header
		pHeaderBufPtr += pTxBlk->MpduHeaderLen;

		//
		// build QOS Control bytes
		//
		*pHeaderBufPtr = (pTxBlk->UserPriority & 0x0F);
		*(pHeaderBufPtr+1) = 0;
		pHeaderBufPtr +=2;
		pTxBlk->MpduHeaderLen += 2;

		//
		// build HTC+
		// HTC control filed following QoS field
		//
		if ((pAd->CommonCfg.bRdg == TRUE) && CLIENT_STATUS_TEST_FLAG(pTxBlk->pMacEntry, fCLIENT_STATUS_RDG_CAPABLE))
		{
			if (pMacEntry->isCached == FALSE)
			{
				// mark HTC bit
				pHeader_802_11->FC.Order = 1;

				NdisZeroMemory(pHeaderBufPtr, 4);
				*(pHeaderBufPtr+3) |= 0x80;
			}
			pHeaderBufPtr += 4;
			pTxBlk->MpduHeaderLen += 4;
		}

		//pTxBlk->MpduHeaderLen = pHeaderBufPtr - pTxBlk->HeaderBuf - TXWI_SIZE - TXINFO_SIZE;
		ASSERT(pTxBlk->MpduHeaderLen >= 24);

		// skip 802.3 header
		pTxBlk->pSrcBufData = pTxBlk->pSrcBufHeader + LENGTH_802_3;
		pTxBlk->SrcBufLen  -= LENGTH_802_3;

		// skip vlan tag
		if (bVLANPkt)
		{
			pTxBlk->pSrcBufData	+= LENGTH_802_1Q;
			pTxBlk->SrcBufLen	-= LENGTH_802_1Q;
		}

		//
		// padding at front of LLC header
		// LLC header should locate at 4-octets aligment
		//
		// @@@ MpduHeaderLen excluding padding @@@
		//
		pTxBlk->HdrPadLen = (ULONG)pHeaderBufPtr;
		pHeaderBufPtr = (PCHAR) ROUND_UP(pHeaderBufPtr, 4);
		pTxBlk->HdrPadLen = (ULONG)(pHeaderBufPtr - pTxBlk->HdrPadLen);

		{

			//
			// Insert LLC-SNAP encapsulation - 8 octets
			//
			EXTRA_LLCSNAP_ENCAP_FROM_PKT_OFFSET(pTxBlk->pSrcBufData-2, pTxBlk->pExtraLlcSnapEncap);
			if (pTxBlk->pExtraLlcSnapEncap)
			{
				NdisMoveMemory(pHeaderBufPtr, pTxBlk->pExtraLlcSnapEncap, 6);
				pHeaderBufPtr += 6;
				// get 2 octets (TypeofLen)
				NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufData-2, 2);
				pHeaderBufPtr += 2;
				pTxBlk->MpduHeaderLen += LENGTH_802_1_H;
			}

		}

		if (pMacEntry->isCached)
		{
            RTMPWriteTxWI_Cache(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);
		}
		else
		{
			RTMPWriteTxWI_Data(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);

			NdisZeroMemory((PUCHAR)(&pMacEntry->CachedBuf[0]), sizeof(pMacEntry->CachedBuf));
			NdisMoveMemory((PUCHAR)(&pMacEntry->CachedBuf[0]), (PUCHAR)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), (pHeaderBufPtr - (PUCHAR)(&pTxBlk->HeaderBuf[TXINFO_SIZE])));
			pMacEntry->isCached = TRUE;
		}

		// calculate Transmitted AMPDU count and ByteCount
		{
			pAd->RalinkCounters.TransmittedMPDUsInAMPDUCount.u.LowPart ++;
			pAd->RalinkCounters.TransmittedOctetsInAMPDUCount.QuadPart += pTxBlk->SrcBufLen;
		}

		//FreeNumber = GET_TXRING_FREENO(pAd, QueIdx);

		HAL_WriteTxResource(pAd, pTxBlk, TRUE, &FreeNumber);

		//
		// Kick out Tx
		//
		if (!RTMP_TEST_PSFLAG(pAd, fRTMP_PS_DISABLE_TX))
			HAL_KickOutTx(pAd, pTxBlk, pTxBlk->QueIdx);

		pAd->RalinkCounters.KickTxCount++;
		pAd->RalinkCounters.OneSecTxDoneCount++;
	}

}


VOID STA_AMSDU_Frame_Tx(
	IN	PRTMP_ADAPTER	pAd,
	IN	TX_BLK			*pTxBlk)
{
	PUCHAR			pHeaderBufPtr;
	USHORT			FreeNumber;
	USHORT			subFramePayloadLen = 0;	// AMSDU Subframe length without AMSDU-Header / Padding.
	USHORT			totalMPDUSize=0;
	UCHAR			*subFrameHeader;
	UCHAR			padding = 0;
	USHORT			FirstTx = 0, LastTxIdx = 0;
	BOOLEAN			bVLANPkt;
	int 			frameNum = 0;
	PQUEUE_ENTRY	pQEntry;


	ASSERT(pTxBlk);

	ASSERT((pTxBlk->TxPacketList.Number > 1));

	while(pTxBlk->TxPacketList.Head)
	{
		pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
		pTxBlk->pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);
		if (RTMP_FillTxBlkInfo(pAd, pTxBlk) != TRUE)
		{
			RELEASE_NDIS_PACKET(pAd, pTxBlk->pPacket, NDIS_STATUS_FAILURE);
			continue;
		}

		bVLANPkt = (RTMP_GET_PACKET_VLAN(pTxBlk->pPacket) ? TRUE : FALSE);

		// skip 802.3 header
		pTxBlk->pSrcBufData = pTxBlk->pSrcBufHeader + LENGTH_802_3;
		pTxBlk->SrcBufLen  -= LENGTH_802_3;

		// skip vlan tag
		if (bVLANPkt)
		{
			pTxBlk->pSrcBufData	+= LENGTH_802_1Q;
			pTxBlk->SrcBufLen	-= LENGTH_802_1Q;
		}

		if (frameNum == 0)
		{
			pHeaderBufPtr = STA_Build_AMSDU_Frame_Header(pAd, pTxBlk);

			// NOTE: TxWI->MPDUtotalByteCount will be updated after final frame was handled.
			RTMPWriteTxWI_Data(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);
		}
		else
		{
			pHeaderBufPtr = &pTxBlk->HeaderBuf[0];
			padding = ROUND_UP(LENGTH_AMSDU_SUBFRAMEHEAD + subFramePayloadLen, 4) - (LENGTH_AMSDU_SUBFRAMEHEAD + subFramePayloadLen);
			NdisZeroMemory(pHeaderBufPtr, padding + LENGTH_AMSDU_SUBFRAMEHEAD);
			pHeaderBufPtr += padding;
			pTxBlk->MpduHeaderLen = padding;
		}

		//
		// A-MSDU subframe
		//   DA(6)+SA(6)+Length(2) + LLC/SNAP Encap
		//
		subFrameHeader = pHeaderBufPtr;
		subFramePayloadLen = pTxBlk->SrcBufLen;

		NdisMoveMemory(subFrameHeader, pTxBlk->pSrcBufHeader, 12);


		pHeaderBufPtr += LENGTH_AMSDU_SUBFRAMEHEAD;
		pTxBlk->MpduHeaderLen += LENGTH_AMSDU_SUBFRAMEHEAD;


		//
		// Insert LLC-SNAP encapsulation - 8 octets
		//
		EXTRA_LLCSNAP_ENCAP_FROM_PKT_OFFSET(pTxBlk->pSrcBufData-2, pTxBlk->pExtraLlcSnapEncap);

		subFramePayloadLen = pTxBlk->SrcBufLen;

		if (pTxBlk->pExtraLlcSnapEncap)
		{
			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pExtraLlcSnapEncap, 6);
			pHeaderBufPtr += 6;
			// get 2 octets (TypeofLen)
			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufData-2, 2);
			pHeaderBufPtr += 2;
			pTxBlk->MpduHeaderLen += LENGTH_802_1_H;
			subFramePayloadLen += LENGTH_802_1_H;
		}

		// update subFrame Length field
		subFrameHeader[12] = (subFramePayloadLen & 0xFF00) >> 8;
		subFrameHeader[13] = subFramePayloadLen & 0xFF;

		totalMPDUSize += pTxBlk->MpduHeaderLen + pTxBlk->SrcBufLen;

		if (frameNum ==0)
			FirstTx = HAL_WriteMultiTxResource(pAd, pTxBlk, frameNum, &FreeNumber);
		else
			LastTxIdx = HAL_WriteMultiTxResource(pAd, pTxBlk, frameNum, &FreeNumber);

		frameNum++;

		pAd->RalinkCounters.KickTxCount++;
		pAd->RalinkCounters.OneSecTxDoneCount++;

		// calculate Transmitted AMSDU Count and ByteCount
		{
			pAd->RalinkCounters.TransmittedAMSDUCount.u.LowPart ++;
			pAd->RalinkCounters.TransmittedOctetsInAMSDU.QuadPart += totalMPDUSize;
		}

	}

	HAL_FinalWriteTxResource(pAd, pTxBlk, totalMPDUSize, FirstTx);
	HAL_LastTxIdx(pAd, pTxBlk->QueIdx, LastTxIdx);

	//
	// Kick out Tx
	//
	if (!RTMP_TEST_PSFLAG(pAd, fRTMP_PS_DISABLE_TX))
		HAL_KickOutTx(pAd, pTxBlk, pTxBlk->QueIdx);
}
#endif // DOT11_N_SUPPORT //

VOID STA_Legacy_Frame_Tx(
	IN	PRTMP_ADAPTER	pAd,
	IN	TX_BLK			*pTxBlk)
{
	HEADER_802_11	*pHeader_802_11;
	PUCHAR			pHeaderBufPtr;
	USHORT			FreeNumber;
	BOOLEAN			bVLANPkt;
	PQUEUE_ENTRY	pQEntry;

	ASSERT(pTxBlk);


	pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
	pTxBlk->pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);
	if (RTMP_FillTxBlkInfo(pAd, pTxBlk) != TRUE)
	{
		RELEASE_NDIS_PACKET(pAd, pTxBlk->pPacket, NDIS_STATUS_FAILURE);
		return;
	}

	if (pTxBlk->TxFrameType == TX_MCAST_FRAME)
	{
		INC_COUNTER64(pAd->WlanCounters.MulticastTransmittedFrameCount);
	}

	if (RTMP_GET_PACKET_RTS(pTxBlk->pPacket))
		TX_BLK_SET_FLAG(pTxBlk, fTX_bRtsRequired);
	else
		TX_BLK_CLEAR_FLAG(pTxBlk, fTX_bRtsRequired);

	bVLANPkt = (RTMP_GET_PACKET_VLAN(pTxBlk->pPacket) ? TRUE : FALSE);

	if (pTxBlk->TxRate < pAd->CommonCfg.MinTxRate)
		pTxBlk->TxRate = pAd->CommonCfg.MinTxRate;

	STAFindCipherAlgorithm(pAd, pTxBlk);
	STABuildCommon802_11Header(pAd, pTxBlk);


	// skip 802.3 header
	pTxBlk->pSrcBufData = pTxBlk->pSrcBufHeader + LENGTH_802_3;
	pTxBlk->SrcBufLen  -= LENGTH_802_3;

	// skip vlan tag
	if (bVLANPkt)
	{
		pTxBlk->pSrcBufData	+= LENGTH_802_1Q;
		pTxBlk->SrcBufLen	-= LENGTH_802_1Q;
	}

	pHeaderBufPtr = &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];
	pHeader_802_11 = (HEADER_802_11 *) pHeaderBufPtr;

	// skip common header
	pHeaderBufPtr += pTxBlk->MpduHeaderLen;

	if (TX_BLK_TEST_FLAG(pTxBlk, fTX_bWMM))
	{
		//
		// build QOS Control bytes
		//
		*pHeaderBufPtr = (pTxBlk->UserPriority & 0x0F);
		*(pHeaderBufPtr+1) = 0;
		pHeaderBufPtr +=2;
		pTxBlk->MpduHeaderLen += 2;
	}

	// The remaining content of MPDU header should locate at 4-octets aligment
	pTxBlk->HdrPadLen = (ULONG)pHeaderBufPtr;
	pHeaderBufPtr = (PCHAR) ROUND_UP(pHeaderBufPtr, 4);
	pTxBlk->HdrPadLen = (ULONG)(pHeaderBufPtr - pTxBlk->HdrPadLen);

	{

		//
		// Insert LLC-SNAP encapsulation - 8 octets
		//
		//
   		// if original Ethernet frame contains no LLC/SNAP,
		// then an extra LLC/SNAP encap is required
		//
		EXTRA_LLCSNAP_ENCAP_FROM_PKT_START(pTxBlk->pSrcBufHeader, pTxBlk->pExtraLlcSnapEncap);
		if (pTxBlk->pExtraLlcSnapEncap)
		{
			UCHAR vlan_size;

			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pExtraLlcSnapEncap, 6);
			pHeaderBufPtr += 6;
			// skip vlan tag
			vlan_size =  (bVLANPkt) ? LENGTH_802_1Q : 0;
			// get 2 octets (TypeofLen)
			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufHeader+12+vlan_size, 2);
			pHeaderBufPtr += 2;
			pTxBlk->MpduHeaderLen += LENGTH_802_1_H;
		}

	}

	//
	// prepare for TXWI
	// use Wcid as Key Index
	//

	RTMPWriteTxWI_Data(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);

	//FreeNumber = GET_TXRING_FREENO(pAd, QueIdx);

	HAL_WriteTxResource(pAd, pTxBlk, TRUE, &FreeNumber);

	pAd->RalinkCounters.KickTxCount++;
	pAd->RalinkCounters.OneSecTxDoneCount++;

	//
	// Kick out Tx
	//
	if (!RTMP_TEST_PSFLAG(pAd, fRTMP_PS_DISABLE_TX))
		HAL_KickOutTx(pAd, pTxBlk, pTxBlk->QueIdx);
}


VOID STA_ARalink_Frame_Tx(
	IN	PRTMP_ADAPTER	pAd,
	IN	TX_BLK			*pTxBlk)
{
	PUCHAR			pHeaderBufPtr;
	USHORT			FreeNumber;
	USHORT			totalMPDUSize=0;
	USHORT			FirstTx, LastTxIdx;
	int 			frameNum = 0;
	BOOLEAN			bVLANPkt;
	PQUEUE_ENTRY	pQEntry;


	ASSERT(pTxBlk);

	ASSERT((pTxBlk->TxPacketList.Number== 2));


	FirstTx = LastTxIdx = 0;  // Is it ok init they as 0?
	while(pTxBlk->TxPacketList.Head)
	{
		pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
		pTxBlk->pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);

		if (RTMP_FillTxBlkInfo(pAd, pTxBlk) != TRUE)
		{
			RELEASE_NDIS_PACKET(pAd, pTxBlk->pPacket, NDIS_STATUS_FAILURE);
			continue;
		}

		bVLANPkt = (RTMP_GET_PACKET_VLAN(pTxBlk->pPacket) ? TRUE : FALSE);

		// skip 802.3 header
		pTxBlk->pSrcBufData = pTxBlk->pSrcBufHeader + LENGTH_802_3;
		pTxBlk->SrcBufLen  -= LENGTH_802_3;

		// skip vlan tag
		if (bVLANPkt)
		{
			pTxBlk->pSrcBufData	+= LENGTH_802_1Q;
			pTxBlk->SrcBufLen	-= LENGTH_802_1Q;
		}

		if (frameNum == 0)
		{	// For first frame, we need to create the 802.11 header + padding(optional) + RA-AGG-LEN + SNAP Header

			pHeaderBufPtr = STA_Build_ARalink_Frame_Header(pAd, pTxBlk);

			// It's ok write the TxWI here, because the TxWI->MPDUtotalByteCount
			//	will be updated after final frame was handled.
			RTMPWriteTxWI_Data(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);


			//
			// Insert LLC-SNAP encapsulation - 8 octets
			//
			EXTRA_LLCSNAP_ENCAP_FROM_PKT_OFFSET(pTxBlk->pSrcBufData-2, pTxBlk->pExtraLlcSnapEncap);

			if (pTxBlk->pExtraLlcSnapEncap)
			{
				NdisMoveMemory(pHeaderBufPtr, pTxBlk->pExtraLlcSnapEncap, 6);
				pHeaderBufPtr += 6;
				// get 2 octets (TypeofLen)
				NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufData-2, 2);
				pHeaderBufPtr += 2;
				pTxBlk->MpduHeaderLen += LENGTH_802_1_H;
			}
		}
		else
		{	// For second aggregated frame, we need create the 802.3 header to headerBuf, because PCI will copy it to SDPtr0.

			pHeaderBufPtr = &pTxBlk->HeaderBuf[0];
			pTxBlk->MpduHeaderLen = 0;

			// A-Ralink sub-sequent frame header is the same as 802.3 header.
			//   DA(6)+SA(6)+FrameType(2)
			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufHeader, 12);
			pHeaderBufPtr += 12;
			// get 2 octets (TypeofLen)
			NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufData-2, 2);
			pHeaderBufPtr += 2;
			pTxBlk->MpduHeaderLen = LENGTH_ARALINK_SUBFRAMEHEAD;
		}

		totalMPDUSize += pTxBlk->MpduHeaderLen + pTxBlk->SrcBufLen;

		//FreeNumber = GET_TXRING_FREENO(pAd, QueIdx);
		if (frameNum ==0)
			FirstTx = HAL_WriteMultiTxResource(pAd, pTxBlk, frameNum, &FreeNumber);
		else
			LastTxIdx = HAL_WriteMultiTxResource(pAd, pTxBlk, frameNum, &FreeNumber);

		frameNum++;

		pAd->RalinkCounters.OneSecTxAggregationCount++;
		pAd->RalinkCounters.KickTxCount++;
		pAd->RalinkCounters.OneSecTxDoneCount++;

	}

	HAL_FinalWriteTxResource(pAd, pTxBlk, totalMPDUSize, FirstTx);
	HAL_LastTxIdx(pAd, pTxBlk->QueIdx, LastTxIdx);

	//
	// Kick out Tx
	//
	if (!RTMP_TEST_PSFLAG(pAd, fRTMP_PS_DISABLE_TX))
		HAL_KickOutTx(pAd, pTxBlk, pTxBlk->QueIdx);

}


VOID STA_Fragment_Frame_Tx(
	IN RTMP_ADAPTER *pAd,
	IN TX_BLK		*pTxBlk)
{
	HEADER_802_11	*pHeader_802_11;
	PUCHAR			pHeaderBufPtr;
	USHORT			FreeNumber;
	UCHAR 			fragNum = 0;
	PACKET_INFO		PacketInfo;
	USHORT			EncryptionOverhead = 0;
	UINT32			FreeMpduSize, SrcRemainingBytes;
	USHORT			AckDuration;
	UINT 			NextMpduSize;
	BOOLEAN			bVLANPkt;
	PQUEUE_ENTRY	pQEntry;


	ASSERT(pTxBlk);

	pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
	pTxBlk->pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);
	if (RTMP_FillTxBlkInfo(pAd, pTxBlk) != TRUE)
	{
		RELEASE_NDIS_PACKET(pAd, pTxBlk->pPacket, NDIS_STATUS_FAILURE);
		return;
	}

	ASSERT(TX_BLK_TEST_FLAG(pTxBlk, fTX_bAllowFrag));
	bVLANPkt = (RTMP_GET_PACKET_VLAN(pTxBlk->pPacket) ? TRUE : FALSE);

	STAFindCipherAlgorithm(pAd, pTxBlk);
	STABuildCommon802_11Header(pAd, pTxBlk);

	if (pTxBlk->CipherAlg == CIPHER_TKIP)
	{
		pTxBlk->pPacket = duplicate_pkt_with_TKIP_MIC(pAd, pTxBlk->pPacket);
		if (pTxBlk->pPacket == NULL)
			return;
		RTMP_QueryPacketInfo(pTxBlk->pPacket, &PacketInfo, &pTxBlk->pSrcBufHeader, &pTxBlk->SrcBufLen);
	}

	// skip 802.3 header
	pTxBlk->pSrcBufData = pTxBlk->pSrcBufHeader + LENGTH_802_3;
	pTxBlk->SrcBufLen  -= LENGTH_802_3;


	// skip vlan tag
	if (bVLANPkt)
	{
		pTxBlk->pSrcBufData	+= LENGTH_802_1Q;
		pTxBlk->SrcBufLen	-= LENGTH_802_1Q;
	}

	pHeaderBufPtr = &pTxBlk->HeaderBuf[TXINFO_SIZE + TXWI_SIZE];
	pHeader_802_11 = (HEADER_802_11 *)pHeaderBufPtr;


	// skip common header
	pHeaderBufPtr += pTxBlk->MpduHeaderLen;

	if (TX_BLK_TEST_FLAG(pTxBlk, fTX_bWMM))
	{
		//
		// build QOS Control bytes
		//
		*pHeaderBufPtr = (pTxBlk->UserPriority & 0x0F);

		*(pHeaderBufPtr+1) = 0;
		pHeaderBufPtr +=2;
		pTxBlk->MpduHeaderLen += 2;
	}

	//
	// padding at front of LLC header
	// LLC header should locate at 4-octets aligment
	//
	pTxBlk->HdrPadLen = (ULONG)pHeaderBufPtr;
	pHeaderBufPtr = (PCHAR) ROUND_UP(pHeaderBufPtr, 4);
	pTxBlk->HdrPadLen = (ULONG)(pHeaderBufPtr - pTxBlk->HdrPadLen);



	//
	// Insert LLC-SNAP encapsulation - 8 octets
	//
	//
   	// if original Ethernet frame contains no LLC/SNAP,
	// then an extra LLC/SNAP encap is required
	//
	EXTRA_LLCSNAP_ENCAP_FROM_PKT_START(pTxBlk->pSrcBufHeader, pTxBlk->pExtraLlcSnapEncap);
	if (pTxBlk->pExtraLlcSnapEncap)
	{
		UCHAR vlan_size;

		NdisMoveMemory(pHeaderBufPtr, pTxBlk->pExtraLlcSnapEncap, 6);
		pHeaderBufPtr += 6;
		// skip vlan tag
		vlan_size =  (bVLANPkt) ? LENGTH_802_1Q : 0;
		// get 2 octets (TypeofLen)
		NdisMoveMemory(pHeaderBufPtr, pTxBlk->pSrcBufHeader+12+vlan_size, 2);
		pHeaderBufPtr += 2;
		pTxBlk->MpduHeaderLen += LENGTH_802_1_H;
	}


	// If TKIP is used and fragmentation is required. Driver has to
	//	append TKIP MIC at tail of the scatter buffer
	//	MAC ASIC will only perform IV/EIV/ICV insertion but no TKIP MIC
	if (pTxBlk->CipherAlg == CIPHER_TKIP)
	{

		// NOTE: DON'T refer the skb->len directly after following copy. Becasue the length is not adjust
		//			to correct lenght, refer to pTxBlk->SrcBufLen for the packet length in following progress.
		NdisMoveMemory(pTxBlk->pSrcBufData + pTxBlk->SrcBufLen, &pAd->PrivateInfo.Tx.MIC[0], 8);
		//skb_put((RTPKT_TO_OSPKT(pTxBlk->pPacket))->tail, 8);
		pTxBlk->SrcBufLen += 8;
		pTxBlk->TotalFrameLen += 8;
		pTxBlk->CipherAlg = CIPHER_TKIP_NO_MIC;
	}

	//
	// calcuate the overhead bytes that encryption algorithm may add. This
	// affects the calculate of "duration" field
	//
	if ((pTxBlk->CipherAlg == CIPHER_WEP64) || (pTxBlk->CipherAlg == CIPHER_WEP128))
		EncryptionOverhead = 8; //WEP: IV[4] + ICV[4];
	else if (pTxBlk->CipherAlg == CIPHER_TKIP_NO_MIC)
		EncryptionOverhead = 12;//TKIP: IV[4] + EIV[4] + ICV[4], MIC will be added to TotalPacketLength
	else if (pTxBlk->CipherAlg == CIPHER_TKIP)
		EncryptionOverhead = 20;//TKIP: IV[4] + EIV[4] + ICV[4] + MIC[8]
	else if (pTxBlk->CipherAlg == CIPHER_AES)
		EncryptionOverhead = 16;	// AES: IV[4] + EIV[4] + MIC[8]
	else
		EncryptionOverhead = 0;

	// decide how much time an ACK/CTS frame will consume in the air
	AckDuration = RTMPCalcDuration(pAd, pAd->CommonCfg.ExpectedACKRate[pTxBlk->TxRate], 14);

	// Init the total payload length of this frame.
	SrcRemainingBytes = pTxBlk->SrcBufLen;

	pTxBlk->TotalFragNum = 0xff;

	do {

		FreeMpduSize = pAd->CommonCfg.FragmentThreshold - LENGTH_CRC;

		FreeMpduSize -= pTxBlk->MpduHeaderLen;

		if (SrcRemainingBytes <= FreeMpduSize)
		{	// this is the last or only fragment

			pTxBlk->SrcBufLen = SrcRemainingBytes;

			pHeader_802_11->FC.MoreFrag = 0;
			pHeader_802_11->Duration = pAd->CommonCfg.Dsifs + AckDuration;

			// Indicate the lower layer that this's the last fragment.
			pTxBlk->TotalFragNum = fragNum;
		}
		else
		{	// more fragment is required

			pTxBlk->SrcBufLen = FreeMpduSize;

			NextMpduSize = min(((UINT)SrcRemainingBytes - pTxBlk->SrcBufLen), ((UINT)pAd->CommonCfg.FragmentThreshold));
			pHeader_802_11->FC.MoreFrag = 1;
			pHeader_802_11->Duration = (3 * pAd->CommonCfg.Dsifs) + (2 * AckDuration) + RTMPCalcDuration(pAd, pTxBlk->TxRate, NextMpduSize + EncryptionOverhead);
		}

		if (fragNum == 0)
			pTxBlk->FrameGap = IFS_HTTXOP;
		else
			pTxBlk->FrameGap = IFS_SIFS;

		RTMPWriteTxWI_Data(pAd, (PTXWI_STRUC)(&pTxBlk->HeaderBuf[TXINFO_SIZE]), pTxBlk);

		HAL_WriteFragTxResource(pAd, pTxBlk, fragNum, &FreeNumber);

		pAd->RalinkCounters.KickTxCount++;
		pAd->RalinkCounters.OneSecTxDoneCount++;

		// Update the frame number, remaining size of the NDIS packet payload.

		// space for 802.11 header.
		if (fragNum == 0 && pTxBlk->pExtraLlcSnapEncap)
			pTxBlk->MpduHeaderLen -= LENGTH_802_1_H;

		fragNum++;
		SrcRemainingBytes -= pTxBlk->SrcBufLen;
		pTxBlk->pSrcBufData += pTxBlk->SrcBufLen;

		pHeader_802_11->Frag++;	 // increase Frag #

	}while(SrcRemainingBytes > 0);

	//
	// Kick out Tx
	//
	HAL_KickOutTx(pAd, pTxBlk, pTxBlk->QueIdx);
}


#define RELEASE_FRAMES_OF_TXBLK(_pAd, _pTxBlk, _pQEntry, _Status) 										\
		while(_pTxBlk->TxPacketList.Head)														\
		{																						\
			_pQEntry = RemoveHeadQueue(&_pTxBlk->TxPacketList);									\
			RELEASE_NDIS_PACKET(_pAd, QUEUE_ENTRY_TO_PACKET(_pQEntry), _Status);	\
		}


/*
	========================================================================

	Routine Description:
		Copy frame from waiting queue into relative ring buffer and set
	appropriate ASIC register to kick hardware encryption before really
	sent out to air.

	Arguments:
		pAd 	Pointer to our adapter
		PNDIS_PACKET	Pointer to outgoing Ndis frame
		NumberOfFrag	Number of fragment required

	Return Value:
		None

	IRQL = DISPATCH_LEVEL

	Note:

	========================================================================
*/
NDIS_STATUS STAHardTransmit(
	IN PRTMP_ADAPTER	pAd,
	IN TX_BLK 			*pTxBlk,
	IN	UCHAR			QueIdx)
{
	NDIS_PACKET		*pPacket;
	PQUEUE_ENTRY	pQEntry;

	// ---------------------------------------------
	// STEP 0. DO SANITY CHECK AND SOME EARLY PREPARATION.
	// ---------------------------------------------
	//
	ASSERT(pTxBlk->TxPacketList.Number);
	if (pTxBlk->TxPacketList.Head == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("pTxBlk->TotalFrameNum == %ld!\n", pTxBlk->TxPacketList.Number));
		return NDIS_STATUS_FAILURE;
	}

	pPacket = QUEUE_ENTRY_TO_PACKET(pTxBlk->TxPacketList.Head);

#if 0 //def CARRIER_DETECTION_SUPPORT // Roger sync Carrier
		if ((pAd->CommonCfg.CarrierDetect.Enable == TRUE) && (isCarrierDetectExist(pAd) == TRUE))
	{
		DBGPRINT(RT_DEBUG_INFO,("STAHardTransmit --> radar detect not in normal mode !!!\n"));
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
		return (NDIS_STATUS_FAILURE);
	}
#endif // CARRIER_DETECTION_SUPPORT //

	// ------------------------------------------------------------------
	// STEP 1. WAKE UP PHY
	//		outgoing frame always wakeup PHY to prevent frame lost and
	//		turn off PSM bit to improve performance
	// ------------------------------------------------------------------
	// not to change PSM bit, just send this frame out?
	if ((pAd->StaCfg.Psm == PWR_SAVE) && OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE))
	{
	    DBGPRINT_RAW(RT_DEBUG_TRACE, ("AsicForceWakeup At HardTx\n"));
		AsicForceWakeup(pAd, FROM_TX);
	}

	// It should not change PSM bit, when APSD turn on.
	if ((!(pAd->CommonCfg.bAPSDCapable && pAd->CommonCfg.APEdcaParm.bAPSDCapable) && (pAd->CommonCfg.bAPSDForcePowerSave == FALSE))
		|| (RTMP_GET_PACKET_EAPOL(pTxBlk->pPacket))
		|| (RTMP_GET_PACKET_WAI(pTxBlk->pPacket)))
	{
		if ((pAd->StaCfg.Psm == PWR_SAVE) &&
            (pAd->StaCfg.WindowsPowerMode == Ndis802_11PowerModeFast_PSP))
			MlmeSetPsmBit(pAd, PWR_ACTIVE);
	}

	switch (pTxBlk->TxFrameType)
	{
#ifdef DOT11_N_SUPPORT
		case TX_AMPDU_FRAME:
				STA_AMPDU_Frame_Tx(pAd, pTxBlk);
			break;
		case TX_AMSDU_FRAME:
				STA_AMSDU_Frame_Tx(pAd, pTxBlk);
			break;
#endif // DOT11_N_SUPPORT //
		case TX_LEGACY_FRAME:
				STA_Legacy_Frame_Tx(pAd, pTxBlk);
			break;
		case TX_MCAST_FRAME:
				STA_Legacy_Frame_Tx(pAd, pTxBlk);
			break;
		case TX_RALINK_FRAME:
				STA_ARalink_Frame_Tx(pAd, pTxBlk);
			break;
		case TX_FRAG_FRAME:
				STA_Fragment_Frame_Tx(pAd, pTxBlk);
			break;
		default:
			{
				// It should not happened!
				DBGPRINT(RT_DEBUG_ERROR, ("Send a pacekt was not classified!! It should not happen!\n"));
				while(pTxBlk->TxPacketList.Number)
				{
					pQEntry = RemoveHeadQueue(&pTxBlk->TxPacketList);
					pPacket = QUEUE_ENTRY_TO_PACKET(pQEntry);
					if (pPacket)
						RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
				}
			}
			break;
	}

	return (NDIS_STATUS_SUCCESS);

}

ULONG  HashBytesPolynomial(UCHAR *value, unsigned int len)
{
   unsigned char *word = value;
   unsigned int ret = 0;
   unsigned int i;

   for(i=0; i < len; i++)
   {
	  int mod = i % 32;
	  ret ^=(unsigned int) (word[i]) << mod;
	  ret ^=(unsigned int) (word[i]) >> (32 - mod);
   }
   return ret;
}

VOID Sta_Announce_or_Forward_802_3_Packet(
	IN	PRTMP_ADAPTER	pAd,
	IN	PNDIS_PACKET	pPacket,
	IN	UCHAR			FromWhichBSSID)
{
	if (TRUE
		)
	{
		announce_802_3_packet(pAd, pPacket);
	}
	else
	{
		// release packet
		RELEASE_NDIS_PACKET(pAd, pPacket, NDIS_STATUS_FAILURE);
	}
}