/*
 *************************************************************************
 * 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:
	action.c

    Abstract:
    Handle association related requests either from WSTA or from local MLME

    Revision History:
    Who          When          What
    ---------    ----------    ----------------------------------------------
	Fonchi Wu    2008	  	   created for 802.11h
 */

#include "../rt_config.h"
#include "action.h"

VOID MeasureReqTabInit(
	IN PRTMP_ADAPTER pAd)
{
	NdisAllocateSpinLock(&pAd->CommonCfg.MeasureReqTabLock);

	pAd->CommonCfg.pMeasureReqTab = kmalloc(sizeof(MEASURE_REQ_TAB), GFP_ATOMIC);
	if (pAd->CommonCfg.pMeasureReqTab)
		NdisZeroMemory(pAd->CommonCfg.pMeasureReqTab, sizeof(MEASURE_REQ_TAB));
	else
		DBGPRINT(RT_DEBUG_ERROR, ("%s Fail to alloc memory for pAd->CommonCfg.pMeasureReqTab.\n", __func__));

	return;
}

VOID MeasureReqTabExit(
	IN PRTMP_ADAPTER pAd)
{
	NdisFreeSpinLock(pAd->CommonCfg.MeasureReqTabLock);

	if (pAd->CommonCfg.pMeasureReqTab)
		kfree(pAd->CommonCfg.pMeasureReqTab);
	pAd->CommonCfg.pMeasureReqTab = NULL;

	return;
}

static PMEASURE_REQ_ENTRY MeasureReqLookUp(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	UINT HashIdx;
	PMEASURE_REQ_TAB pTab = pAd->CommonCfg.pMeasureReqTab;
	PMEASURE_REQ_ENTRY pEntry = NULL;
	PMEASURE_REQ_ENTRY pPrevEntry = NULL;

	if (pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pMeasureReqTab doesn't exist.\n", __func__));
		return NULL;
	}

	RTMP_SEM_LOCK(&pAd->CommonCfg.MeasureReqTabLock);

	HashIdx = MQ_DIALOGTOKEN_HASH_INDEX(DialogToken);
	pEntry = pTab->Hash[HashIdx];

	while (pEntry)
	{
		if (pEntry->DialogToken == DialogToken)
			break;
		else
		{
			pPrevEntry = pEntry;
			pEntry = pEntry->pNext;
		}
	}

	RTMP_SEM_UNLOCK(&pAd->CommonCfg.MeasureReqTabLock);

	return pEntry;
}

static PMEASURE_REQ_ENTRY MeasureReqInsert(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	INT i;
	ULONG HashIdx;
	PMEASURE_REQ_TAB pTab = pAd->CommonCfg.pMeasureReqTab;
	PMEASURE_REQ_ENTRY pEntry = NULL, pCurrEntry;
	ULONG Now;

	if(pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pMeasureReqTab doesn't exist.\n", __func__));
		return NULL;
	}

	pEntry = MeasureReqLookUp(pAd, DialogToken);
	if (pEntry == NULL)
	{
		RTMP_SEM_LOCK(&pAd->CommonCfg.MeasureReqTabLock);
		for (i = 0; i < MAX_MEASURE_REQ_TAB_SIZE; i++)
		{
			NdisGetSystemUpTime(&Now);
			pEntry = &pTab->Content[i];

			if ((pEntry->Valid == TRUE)
				&& RTMP_TIME_AFTER((unsigned long)Now, (unsigned long)(pEntry->lastTime + MQ_REQ_AGE_OUT)))
			{
				PMEASURE_REQ_ENTRY pPrevEntry = NULL;
				ULONG HashIdx = MQ_DIALOGTOKEN_HASH_INDEX(pEntry->DialogToken);
				PMEASURE_REQ_ENTRY pProbeEntry = pTab->Hash[HashIdx];

				// update Hash list
				do
				{
					if (pProbeEntry == pEntry)
					{
						if (pPrevEntry == NULL)
						{
							pTab->Hash[HashIdx] = pEntry->pNext;
						}
						else
						{
							pPrevEntry->pNext = pEntry->pNext;
						}
						break;
					}

					pPrevEntry = pProbeEntry;
					pProbeEntry = pProbeEntry->pNext;
				} while (pProbeEntry);

				NdisZeroMemory(pEntry, sizeof(MEASURE_REQ_ENTRY));
				pTab->Size--;

				break;
			}

			if (pEntry->Valid == FALSE)
				break;
		}

		if (i < MAX_MEASURE_REQ_TAB_SIZE)
		{
			NdisGetSystemUpTime(&Now);
			pEntry->lastTime = Now;
			pEntry->Valid = TRUE;
			pEntry->DialogToken = DialogToken;
			pTab->Size++;
		}
		else
		{
			pEntry = NULL;
			DBGPRINT(RT_DEBUG_ERROR, ("%s: pMeasureReqTab tab full.\n", __func__));
		}

		// add this Neighbor entry into HASH table
		if (pEntry)
		{
			HashIdx = MQ_DIALOGTOKEN_HASH_INDEX(DialogToken);
			if (pTab->Hash[HashIdx] == NULL)
			{
				pTab->Hash[HashIdx] = pEntry;
			}
			else
			{
				pCurrEntry = pTab->Hash[HashIdx];
				while (pCurrEntry->pNext != NULL)
					pCurrEntry = pCurrEntry->pNext;
				pCurrEntry->pNext = pEntry;
			}
		}

		RTMP_SEM_UNLOCK(&pAd->CommonCfg.MeasureReqTabLock);
	}

	return pEntry;
}

static VOID MeasureReqDelete(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	PMEASURE_REQ_TAB pTab = pAd->CommonCfg.pMeasureReqTab;
	PMEASURE_REQ_ENTRY pEntry = NULL;

	if(pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pMeasureReqTab doesn't exist.\n", __func__));
		return;
	}

	// if empty, return
	if (pTab->Size == 0)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("pMeasureReqTab empty.\n"));
		return;
	}

	pEntry = MeasureReqLookUp(pAd, DialogToken);
	if (pEntry != NULL)
	{
		PMEASURE_REQ_ENTRY pPrevEntry = NULL;
		ULONG HashIdx = MQ_DIALOGTOKEN_HASH_INDEX(pEntry->DialogToken);
		PMEASURE_REQ_ENTRY pProbeEntry = pTab->Hash[HashIdx];

		RTMP_SEM_LOCK(&pAd->CommonCfg.MeasureReqTabLock);
		// update Hash list
		do
		{
			if (pProbeEntry == pEntry)
			{
				if (pPrevEntry == NULL)
				{
					pTab->Hash[HashIdx] = pEntry->pNext;
				}
				else
				{
					pPrevEntry->pNext = pEntry->pNext;
				}
				break;
			}

			pPrevEntry = pProbeEntry;
			pProbeEntry = pProbeEntry->pNext;
		} while (pProbeEntry);

		NdisZeroMemory(pEntry, sizeof(MEASURE_REQ_ENTRY));
		pTab->Size--;

		RTMP_SEM_UNLOCK(&pAd->CommonCfg.MeasureReqTabLock);
	}

	return;
}

VOID TpcReqTabInit(
	IN PRTMP_ADAPTER pAd)
{
	NdisAllocateSpinLock(&pAd->CommonCfg.TpcReqTabLock);

	pAd->CommonCfg.pTpcReqTab = kmalloc(sizeof(TPC_REQ_TAB), GFP_ATOMIC);
	if (pAd->CommonCfg.pTpcReqTab)
		NdisZeroMemory(pAd->CommonCfg.pTpcReqTab, sizeof(TPC_REQ_TAB));
	else
		DBGPRINT(RT_DEBUG_ERROR, ("%s Fail to alloc memory for pAd->CommonCfg.pTpcReqTab.\n", __func__));

	return;
}

VOID TpcReqTabExit(
	IN PRTMP_ADAPTER pAd)
{
	NdisFreeSpinLock(pAd->CommonCfg.TpcReqTabLock);

	if (pAd->CommonCfg.pTpcReqTab)
		kfree(pAd->CommonCfg.pTpcReqTab);
	pAd->CommonCfg.pTpcReqTab = NULL;

	return;
}

static PTPC_REQ_ENTRY TpcReqLookUp(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	UINT HashIdx;
	PTPC_REQ_TAB pTab = pAd->CommonCfg.pTpcReqTab;
	PTPC_REQ_ENTRY pEntry = NULL;
	PTPC_REQ_ENTRY pPrevEntry = NULL;

	if (pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pTpcReqTab doesn't exist.\n", __func__));
		return NULL;
	}

	RTMP_SEM_LOCK(&pAd->CommonCfg.TpcReqTabLock);

	HashIdx = TPC_DIALOGTOKEN_HASH_INDEX(DialogToken);
	pEntry = pTab->Hash[HashIdx];

	while (pEntry)
	{
		if (pEntry->DialogToken == DialogToken)
			break;
		else
		{
			pPrevEntry = pEntry;
			pEntry = pEntry->pNext;
		}
	}

	RTMP_SEM_UNLOCK(&pAd->CommonCfg.TpcReqTabLock);

	return pEntry;
}


static PTPC_REQ_ENTRY TpcReqInsert(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	INT i;
	ULONG HashIdx;
	PTPC_REQ_TAB pTab = pAd->CommonCfg.pTpcReqTab;
	PTPC_REQ_ENTRY pEntry = NULL, pCurrEntry;
	ULONG Now;

	if(pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pTpcReqTab doesn't exist.\n", __func__));
		return NULL;
	}

	pEntry = TpcReqLookUp(pAd, DialogToken);
	if (pEntry == NULL)
	{
		RTMP_SEM_LOCK(&pAd->CommonCfg.TpcReqTabLock);
		for (i = 0; i < MAX_TPC_REQ_TAB_SIZE; i++)
		{
			NdisGetSystemUpTime(&Now);
			pEntry = &pTab->Content[i];

			if ((pEntry->Valid == TRUE)
				&& RTMP_TIME_AFTER((unsigned long)Now, (unsigned long)(pEntry->lastTime + TPC_REQ_AGE_OUT)))
			{
				PTPC_REQ_ENTRY pPrevEntry = NULL;
				ULONG HashIdx = TPC_DIALOGTOKEN_HASH_INDEX(pEntry->DialogToken);
				PTPC_REQ_ENTRY pProbeEntry = pTab->Hash[HashIdx];

				// update Hash list
				do
				{
					if (pProbeEntry == pEntry)
					{
						if (pPrevEntry == NULL)
						{
							pTab->Hash[HashIdx] = pEntry->pNext;
						}
						else
						{
							pPrevEntry->pNext = pEntry->pNext;
						}
						break;
					}

					pPrevEntry = pProbeEntry;
					pProbeEntry = pProbeEntry->pNext;
				} while (pProbeEntry);

				NdisZeroMemory(pEntry, sizeof(TPC_REQ_ENTRY));
				pTab->Size--;

				break;
			}

			if (pEntry->Valid == FALSE)
				break;
		}

		if (i < MAX_TPC_REQ_TAB_SIZE)
		{
			NdisGetSystemUpTime(&Now);
			pEntry->lastTime = Now;
			pEntry->Valid = TRUE;
			pEntry->DialogToken = DialogToken;
			pTab->Size++;
		}
		else
		{
			pEntry = NULL;
			DBGPRINT(RT_DEBUG_ERROR, ("%s: pTpcReqTab tab full.\n", __func__));
		}

		// add this Neighbor entry into HASH table
		if (pEntry)
		{
			HashIdx = TPC_DIALOGTOKEN_HASH_INDEX(DialogToken);
			if (pTab->Hash[HashIdx] == NULL)
			{
				pTab->Hash[HashIdx] = pEntry;
			}
			else
			{
				pCurrEntry = pTab->Hash[HashIdx];
				while (pCurrEntry->pNext != NULL)
					pCurrEntry = pCurrEntry->pNext;
				pCurrEntry->pNext = pEntry;
			}
		}

		RTMP_SEM_UNLOCK(&pAd->CommonCfg.TpcReqTabLock);
	}

	return pEntry;
}

static VOID TpcReqDelete(
	IN PRTMP_ADAPTER	pAd,
	IN UINT8			DialogToken)
{
	PTPC_REQ_TAB pTab = pAd->CommonCfg.pTpcReqTab;
	PTPC_REQ_ENTRY pEntry = NULL;

	if(pTab == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: pTpcReqTab doesn't exist.\n", __func__));
		return;
	}

	// if empty, return
	if (pTab->Size == 0)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("pTpcReqTab empty.\n"));
		return;
	}

	pEntry = TpcReqLookUp(pAd, DialogToken);
	if (pEntry != NULL)
	{
		PTPC_REQ_ENTRY pPrevEntry = NULL;
		ULONG HashIdx = TPC_DIALOGTOKEN_HASH_INDEX(pEntry->DialogToken);
		PTPC_REQ_ENTRY pProbeEntry = pTab->Hash[HashIdx];

		RTMP_SEM_LOCK(&pAd->CommonCfg.TpcReqTabLock);
		// update Hash list
		do
		{
			if (pProbeEntry == pEntry)
			{
				if (pPrevEntry == NULL)
				{
					pTab->Hash[HashIdx] = pEntry->pNext;
				}
				else
				{
					pPrevEntry->pNext = pEntry->pNext;
				}
				break;
			}

			pPrevEntry = pProbeEntry;
			pProbeEntry = pProbeEntry->pNext;
		} while (pProbeEntry);

		NdisZeroMemory(pEntry, sizeof(TPC_REQ_ENTRY));
		pTab->Size--;

		RTMP_SEM_UNLOCK(&pAd->CommonCfg.TpcReqTabLock);
	}

	return;
}

/*
	==========================================================================
	Description:
		Get Current TimeS tamp.

	Parametrs:

	Return	: Current Time Stamp.
	==========================================================================
 */
static UINT64 GetCurrentTimeStamp(
	IN PRTMP_ADAPTER pAd)
{
	// get current time stamp.
	return 0;
}

/*
	==========================================================================
	Description:
		Get Current Transmit Power.

	Parametrs:

	Return	: Current Time Stamp.
	==========================================================================
 */
static UINT8 GetCurTxPwr(
	IN PRTMP_ADAPTER pAd,
	IN UINT8 Wcid)
{
	return 16; /* 16 dBm */
}

/*
	==========================================================================
	Description:
		Insert Dialog Token into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.
		3. Dialog token.

	Return	: None.
	==========================================================================
 */
static VOID InsertDialogToken(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen,
	IN UINT8 DialogToken)
{
	ULONG TempLen;
	MakeOutgoingFrame(pFrameBuf,	&TempLen,
					1,				&DialogToken,
					END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;

	return;
}

/*
	==========================================================================
	Description:
		Insert TPC Request IE into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.

	Return	: None.
	==========================================================================
 */
 static VOID InsertTpcReqIE(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen)
{
	ULONG TempLen;
	ULONG Len = 0;
	UINT8 ElementID = IE_TPC_REQUEST;

	MakeOutgoingFrame(pFrameBuf,					&TempLen,
						1,							&ElementID,
						1,							&Len,
						END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;

	return;
}

/*
	==========================================================================
	Description:
		Insert TPC Report IE into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.
		3. Transmit Power.
		4. Link Margin.

	Return	: None.
	==========================================================================
 */
 static VOID InsertTpcReportIE(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen,
	IN UINT8 TxPwr,
	IN UINT8 LinkMargin)
{
	ULONG TempLen;
	ULONG Len = sizeof(TPC_REPORT_INFO);
	UINT8 ElementID = IE_TPC_REPORT;
	TPC_REPORT_INFO TpcReportIE;

	TpcReportIE.TxPwr = TxPwr;
	TpcReportIE.LinkMargin = LinkMargin;

	MakeOutgoingFrame(pFrameBuf,					&TempLen,
						1,							&ElementID,
						1,							&Len,
						Len,						&TpcReportIE,
						END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;


	return;
}

/*
	==========================================================================
	Description:
		Insert Channel Switch Announcement IE into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.
		3. channel switch announcement mode.
		4. new selected channel.
		5. channel switch announcement count.

	Return	: None.
	==========================================================================
 */
static VOID InsertChSwAnnIE(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen,
	IN UINT8 ChSwMode,
	IN UINT8 NewChannel,
	IN UINT8 ChSwCnt)
{
	ULONG TempLen;
	ULONG Len = sizeof(CH_SW_ANN_INFO);
	UINT8 ElementID = IE_CHANNEL_SWITCH_ANNOUNCEMENT;
	CH_SW_ANN_INFO ChSwAnnIE;

	ChSwAnnIE.ChSwMode = ChSwMode;
	ChSwAnnIE.Channel = NewChannel;
	ChSwAnnIE.ChSwCnt = ChSwCnt;

	MakeOutgoingFrame(pFrameBuf,				&TempLen,
						1,						&ElementID,
						1,						&Len,
						Len,					&ChSwAnnIE,
						END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;


	return;
}

/*
	==========================================================================
	Description:
		Insert Measure Request IE into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.
		3. Measure Token.
		4. Measure Request Mode.
		5. Measure Request Type.
		6. Measure Channel.
		7. Measure Start time.
		8. Measure Duration.


	Return	: None.
	==========================================================================
 */
static VOID InsertMeasureReqIE(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen,
	IN PMEASURE_REQ_INFO pMeasureReqIE)
{
	ULONG TempLen;
	UINT8 Len = sizeof(MEASURE_REQ_INFO);
	UINT8 ElementID = IE_MEASUREMENT_REQUEST;

	MakeOutgoingFrame(pFrameBuf,					&TempLen,
						1,							&ElementID,
						1,							&Len,
						Len,						pMeasureReqIE,
						END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;

	return;
}

/*
	==========================================================================
	Description:
		Insert Measure Report IE into frame.

	Parametrs:
		1. frame buffer pointer.
		2. frame length.
		3. Measure Token.
		4. Measure Request Mode.
		5. Measure Request Type.
		6. Length of Report Infomation
		7. Pointer of Report Infomation Buffer.

	Return	: None.
	==========================================================================
 */
static VOID InsertMeasureReportIE(
	IN PRTMP_ADAPTER pAd,
	OUT PUCHAR pFrameBuf,
	OUT PULONG pFrameLen,
	IN PMEASURE_REPORT_INFO pMeasureReportIE,
	IN UINT8 ReportLnfoLen,
	IN PUINT8 pReportInfo)
{
	ULONG TempLen;
	ULONG Len;
	UINT8 ElementID = IE_MEASUREMENT_REPORT;

	Len = sizeof(MEASURE_REPORT_INFO) + ReportLnfoLen;

	MakeOutgoingFrame(pFrameBuf,					&TempLen,
						1,							&ElementID,
						1,							&Len,
						Len,						pMeasureReportIE,
						END_OF_ARGS);

	*pFrameLen = *pFrameLen + TempLen;

	if ((ReportLnfoLen > 0) && (pReportInfo != NULL))
	{
		MakeOutgoingFrame(pFrameBuf + *pFrameLen,		&TempLen,
							ReportLnfoLen,				pReportInfo,
							END_OF_ARGS);

		*pFrameLen = *pFrameLen + TempLen;
	}
	return;
}

/*
	==========================================================================
	Description:
		Prepare Measurement request action frame and enqueue it into
		management queue waiting for transmition.

	Parametrs:
		1. the destination mac address of the frame.

	Return	: None.
	==========================================================================
 */
VOID EnqueueMeasurementReq(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pDA,
	IN UINT8 MeasureToken,
	IN UINT8 MeasureReqMode,
	IN UINT8 MeasureReqType,
	IN UINT8 MeasureCh,
	IN UINT16 MeasureDuration)
{
	PUCHAR pOutBuffer = NULL;
	NDIS_STATUS NStatus;
	ULONG FrameLen;
	HEADER_802_11 ActHdr;
	MEASURE_REQ_INFO MeasureReqIE;
	UINT8 RmReqDailogToken = RandomByte(pAd);
	UINT64 MeasureStartTime = GetCurrentTimeStamp(pAd);

	// build action frame header.
	MgtMacHeaderInit(pAd, &ActHdr, SUBTYPE_ACTION, 0, pDA,
						pAd->CurrentAddress);

	NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
	if(NStatus != NDIS_STATUS_SUCCESS)
	{
		DBGPRINT(RT_DEBUG_TRACE, ("%s() allocate memory failed \n", __func__));
		return;
	}
	NdisMoveMemory(pOutBuffer, (PCHAR)&ActHdr, sizeof(HEADER_802_11));
	FrameLen = sizeof(HEADER_802_11);

	InsertActField(pAd, (pOutBuffer + FrameLen), &FrameLen, CATEGORY_SPECTRUM, SPEC_MRQ);

	// fill Dialog Token
	InsertDialogToken(pAd, (pOutBuffer + FrameLen), &FrameLen, MeasureToken);

	// prepare Measurement IE.
	NdisZeroMemory(&MeasureReqIE, sizeof(MEASURE_REQ_INFO));
	MeasureReqIE.Token = RmReqDailogToken;
	MeasureReqIE.ReqMode.word = MeasureReqMode;
	MeasureReqIE.ReqType = MeasureReqType;
	MeasureReqIE.MeasureReq.ChNum = MeasureCh;
	MeasureReqIE.MeasureReq.MeasureStartTime = cpu2le64(MeasureStartTime);
	MeasureReqIE.MeasureReq.MeasureDuration = cpu2le16(MeasureDuration);
	InsertMeasureReqIE(pAd, (pOutBuffer + FrameLen), &FrameLen, &MeasureReqIE);

	MiniportMMRequest(pAd, QID_AC_BE, pOutBuffer, FrameLen);
	MlmeFreeMemory(pAd, pOutBuffer);

	return;
}

/*
	==========================================================================
	Description:
		Prepare Measurement report action frame and enqueue it into
		management queue waiting for transmition.

	Parametrs:
		1. the destination mac address of the frame.

	Return	: None.
	==========================================================================
 */
VOID EnqueueMeasurementRep(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pDA,
	IN UINT8 DialogToken,
	IN UINT8 MeasureToken,
	IN UINT8 MeasureReqMode,
	IN UINT8 MeasureReqType,
	IN UINT8 ReportInfoLen,
	IN PUINT8 pReportInfo)
{
	PUCHAR pOutBuffer = NULL;
	NDIS_STATUS NStatus;
	ULONG FrameLen;
	HEADER_802_11 ActHdr;
	MEASURE_REPORT_INFO MeasureRepIE;

	// build action frame header.
	MgtMacHeaderInit(pAd, &ActHdr, SUBTYPE_ACTION, 0, pDA,
						pAd->CurrentAddress);

	NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
	if(NStatus != NDIS_STATUS_SUCCESS)
	{
		DBGPRINT(RT_DEBUG_TRACE, ("%s() allocate memory failed \n", __func__));
		return;
	}
	NdisMoveMemory(pOutBuffer, (PCHAR)&ActHdr, sizeof(HEADER_802_11));
	FrameLen = sizeof(HEADER_802_11);

	InsertActField(pAd, (pOutBuffer + FrameLen), &FrameLen, CATEGORY_SPECTRUM, SPEC_MRP);

	// fill Dialog Token
	InsertDialogToken(pAd, (pOutBuffer + FrameLen), &FrameLen, DialogToken);

	// prepare Measurement IE.
	NdisZeroMemory(&MeasureRepIE, sizeof(MEASURE_REPORT_INFO));
	MeasureRepIE.Token = MeasureToken;
	MeasureRepIE.ReportMode.word = MeasureReqMode;
	MeasureRepIE.ReportType = MeasureReqType;
	InsertMeasureReportIE(pAd, (pOutBuffer + FrameLen), &FrameLen, &MeasureRepIE, ReportInfoLen, pReportInfo);

	MiniportMMRequest(pAd, QID_AC_BE, pOutBuffer, FrameLen);
	MlmeFreeMemory(pAd, pOutBuffer);

	return;
}

/*
	==========================================================================
	Description:
		Prepare TPC Request action frame and enqueue it into
		management queue waiting for transmition.

	Parametrs:
		1. the destination mac address of the frame.

	Return	: None.
	==========================================================================
 */
VOID EnqueueTPCReq(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pDA,
	IN UCHAR DialogToken)
{
	PUCHAR pOutBuffer = NULL;
	NDIS_STATUS NStatus;
	ULONG FrameLen;

	HEADER_802_11 ActHdr;

	// build action frame header.
	MgtMacHeaderInit(pAd, &ActHdr, SUBTYPE_ACTION, 0, pDA,
						pAd->CurrentAddress);

	NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
	if(NStatus != NDIS_STATUS_SUCCESS)
	{
		DBGPRINT(RT_DEBUG_TRACE, ("%s() allocate memory failed \n", __func__));
		return;
	}
	NdisMoveMemory(pOutBuffer, (PCHAR)&ActHdr, sizeof(HEADER_802_11));
	FrameLen = sizeof(HEADER_802_11);

	InsertActField(pAd, (pOutBuffer + FrameLen), &FrameLen, CATEGORY_SPECTRUM, SPEC_TPCRQ);

	// fill Dialog Token
	InsertDialogToken(pAd, (pOutBuffer + FrameLen), &FrameLen, DialogToken);

	// Insert TPC Request IE.
	InsertTpcReqIE(pAd, (pOutBuffer + FrameLen), &FrameLen);

	MiniportMMRequest(pAd, QID_AC_BE, pOutBuffer, FrameLen);
	MlmeFreeMemory(pAd, pOutBuffer);

	return;
}

/*
	==========================================================================
	Description:
		Prepare TPC Report action frame and enqueue it into
		management queue waiting for transmition.

	Parametrs:
		1. the destination mac address of the frame.

	Return	: None.
	==========================================================================
 */
VOID EnqueueTPCRep(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pDA,
	IN UINT8 DialogToken,
	IN UINT8 TxPwr,
	IN UINT8 LinkMargin)
{
	PUCHAR pOutBuffer = NULL;
	NDIS_STATUS NStatus;
	ULONG FrameLen;

	HEADER_802_11 ActHdr;

	// build action frame header.
	MgtMacHeaderInit(pAd, &ActHdr, SUBTYPE_ACTION, 0, pDA,
						pAd->CurrentAddress);

	NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
	if(NStatus != NDIS_STATUS_SUCCESS)
	{
		DBGPRINT(RT_DEBUG_TRACE, ("%s() allocate memory failed \n", __func__));
		return;
	}
	NdisMoveMemory(pOutBuffer, (PCHAR)&ActHdr, sizeof(HEADER_802_11));
	FrameLen = sizeof(HEADER_802_11);

	InsertActField(pAd, (pOutBuffer + FrameLen), &FrameLen, CATEGORY_SPECTRUM, SPEC_TPCRP);

	// fill Dialog Token
	InsertDialogToken(pAd, (pOutBuffer + FrameLen), &FrameLen, DialogToken);

	// Insert TPC Request IE.
	InsertTpcReportIE(pAd, (pOutBuffer + FrameLen), &FrameLen, TxPwr, LinkMargin);

	MiniportMMRequest(pAd, QID_AC_BE, pOutBuffer, FrameLen);
	MlmeFreeMemory(pAd, pOutBuffer);

	return;
}

/*
	==========================================================================
	Description:
		Prepare Channel Switch Announcement action frame and enqueue it into
		management queue waiting for transmition.

	Parametrs:
		1. the destination mac address of the frame.
		2. Channel switch announcement mode.
		2. a New selected channel.

	Return	: None.
	==========================================================================
 */
VOID EnqueueChSwAnn(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pDA,
	IN UINT8 ChSwMode,
	IN UINT8 NewCh)
{
	PUCHAR pOutBuffer = NULL;
	NDIS_STATUS NStatus;
	ULONG FrameLen;

	HEADER_802_11 ActHdr;

	// build action frame header.
	MgtMacHeaderInit(pAd, &ActHdr, SUBTYPE_ACTION, 0, pDA,
						pAd->CurrentAddress);

	NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
	if(NStatus != NDIS_STATUS_SUCCESS)
	{
		DBGPRINT(RT_DEBUG_TRACE, ("%s() allocate memory failed \n", __func__));
		return;
	}
	NdisMoveMemory(pOutBuffer, (PCHAR)&ActHdr, sizeof(HEADER_802_11));
	FrameLen = sizeof(HEADER_802_11);

	InsertActField(pAd, (pOutBuffer + FrameLen), &FrameLen, CATEGORY_SPECTRUM, SPEC_CHANNEL_SWITCH);

	InsertChSwAnnIE(pAd, (pOutBuffer + FrameLen), &FrameLen, ChSwMode, NewCh, 0);

	MiniportMMRequest(pAd, QID_AC_BE, pOutBuffer, FrameLen);
	MlmeFreeMemory(pAd, pOutBuffer);

	return;
}

static BOOLEAN DfsRequirementCheck(
	IN PRTMP_ADAPTER pAd,
	IN UINT8 Channel)
{
	BOOLEAN Result = FALSE;
	INT i;

	do
	{
		// check DFS procedure is running.
		// make sure DFS procedure won't start twice.
		if (pAd->CommonCfg.RadarDetect.RDMode != RD_NORMAL_MODE)
		{
			Result = FALSE;
			break;
		}

		// check the new channel carried from Channel Switch Announcemnet is valid.
		for (i=0; i<pAd->ChannelListNum; i++)
		{
			if ((Channel == pAd->ChannelList[i].Channel)
				&&(pAd->ChannelList[i].RemainingTimeForUse == 0))
			{
				// found radar signal in the channel. the channel can't use at least for 30 minutes.
				pAd->ChannelList[i].RemainingTimeForUse = 1800;//30 min = 1800 sec
				Result = TRUE;
				break;
			}
		}
	} while(FALSE);

	return Result;
}

VOID NotifyChSwAnnToPeerAPs(
	IN PRTMP_ADAPTER pAd,
	IN PUCHAR pRA,
	IN PUCHAR pTA,
	IN UINT8 ChSwMode,
	IN UINT8 Channel)
{
#ifdef WDS_SUPPORT
	if (!((pRA[0] & 0xff) == 0xff)) // is pRA a broadcase address.
	{
		INT i;
		// info neighbor APs that Radar signal found throgh WDS link.
		for (i = 0; i < MAX_WDS_ENTRY; i++)
		{
			if (ValidWdsEntry(pAd, i))
			{
				PUCHAR pDA = pAd->WdsTab.WdsEntry[i].PeerWdsAddr;

				// DA equal to SA. have no necessary orignal AP which found Radar signal.
				if (MAC_ADDR_EQUAL(pTA, pDA))
					continue;

				// send Channel Switch Action frame to info Neighbro APs.
				EnqueueChSwAnn(pAd, pDA, ChSwMode, Channel);
			}
		}
	}
#endif // WDS_SUPPORT //
}

static VOID StartDFSProcedure(
	IN PRTMP_ADAPTER pAd,
	IN UCHAR Channel,
	IN UINT8 ChSwMode)
{
	// start DFS procedure
	pAd->CommonCfg.Channel = Channel;
#ifdef DOT11_N_SUPPORT
	N_ChannelCheck(pAd);
#endif // DOT11_N_SUPPORT //
	pAd->CommonCfg.RadarDetect.RDMode = RD_SWITCHING_MODE;
	pAd->CommonCfg.RadarDetect.CSCount = 0;
}

/*
	==========================================================================
	Description:
		Channel Switch Announcement action frame sanity check.

	Parametrs:
		1. MLME message containing the received frame
		2. message length.
		3. Channel switch announcement infomation buffer.


	Return	: None.
	==========================================================================
 */

/*
  Channel Switch Announcement IE.
  +----+-----+-----------+------------+-----------+
  | ID | Len |Ch Sw Mode | New Ch Num | Ch Sw Cnt |
  +----+-----+-----------+------------+-----------+
    1    1        1           1            1
*/
static BOOLEAN PeerChSwAnnSanity(
	IN PRTMP_ADAPTER pAd,
	IN VOID *pMsg,
	IN ULONG MsgLen,
	OUT PCH_SW_ANN_INFO pChSwAnnInfo)
{
	PFRAME_802_11 Fr = (PFRAME_802_11)pMsg;
	PUCHAR pFramePtr = Fr->Octet;
	BOOLEAN result = FALSE;
	PEID_STRUCT eid_ptr;

	// skip 802.11 header.
	MsgLen -= sizeof(HEADER_802_11);

	// skip category and action code.
	pFramePtr += 2;
	MsgLen -= 2;

	if (pChSwAnnInfo == NULL)
		return result;

	eid_ptr = (PEID_STRUCT)pFramePtr;
	while (((UCHAR*)eid_ptr + eid_ptr->Len + 1) < ((PUCHAR)pFramePtr + MsgLen))
	{
		switch(eid_ptr->Eid)
		{
			case IE_CHANNEL_SWITCH_ANNOUNCEMENT:
				NdisMoveMemory(&pChSwAnnInfo->ChSwMode, eid_ptr->Octet, 1);
				NdisMoveMemory(&pChSwAnnInfo->Channel, eid_ptr->Octet + 1, 1);
				NdisMoveMemory(&pChSwAnnInfo->ChSwCnt, eid_ptr->Octet + 2, 1);

				result = TRUE;
                break;

			default:
				break;
		}
		eid_ptr = (PEID_STRUCT)((UCHAR*)eid_ptr + 2 + eid_ptr->Len);
	}

	return result;
}

/*
	==========================================================================
	Description:
		Measurement request action frame sanity check.

	Parametrs:
		1. MLME message containing the received frame
		2. message length.
		3. Measurement request infomation buffer.

	Return	: None.
	==========================================================================
 */
static BOOLEAN PeerMeasureReqSanity(
	IN PRTMP_ADAPTER pAd,
	IN VOID *pMsg,
	IN ULONG MsgLen,
	OUT PUINT8 pDialogToken,
	OUT PMEASURE_REQ_INFO pMeasureReqInfo)
{
	PFRAME_802_11 Fr = (PFRAME_802_11)pMsg;
	PUCHAR pFramePtr = Fr->Octet;
	BOOLEAN result = FALSE;
	PEID_STRUCT eid_ptr;
	PUCHAR ptr;
	UINT64 MeasureStartTime;
	UINT16 MeasureDuration;

	// skip 802.11 header.
	MsgLen -= sizeof(HEADER_802_11);

	// skip category and action code.
	pFramePtr += 2;
	MsgLen -= 2;

	if (pMeasureReqInfo == NULL)
		return result;

	NdisMoveMemory(pDialogToken, pFramePtr, 1);
	pFramePtr += 1;
	MsgLen -= 1;

	eid_ptr = (PEID_STRUCT)pFramePtr;
	while (((UCHAR*)eid_ptr + eid_ptr->Len + 1) < ((PUCHAR)pFramePtr + MsgLen))
	{
		switch(eid_ptr->Eid)
		{
			case IE_MEASUREMENT_REQUEST:
				NdisMoveMemory(&pMeasureReqInfo->Token, eid_ptr->Octet, 1);
				NdisMoveMemory(&pMeasureReqInfo->ReqMode.word, eid_ptr->Octet + 1, 1);
				NdisMoveMemory(&pMeasureReqInfo->ReqType, eid_ptr->Octet + 2, 1);
				ptr = eid_ptr->Octet + 3;
				NdisMoveMemory(&pMeasureReqInfo->MeasureReq.ChNum, ptr, 1);
				NdisMoveMemory(&MeasureStartTime, ptr + 1, 8);
				pMeasureReqInfo->MeasureReq.MeasureStartTime = SWAP64(MeasureStartTime);
				NdisMoveMemory(&MeasureDuration, ptr + 9, 2);
				pMeasureReqInfo->MeasureReq.MeasureDuration = SWAP16(MeasureDuration);

				result = TRUE;
				break;

			default:
				break;
		}
		eid_ptr = (PEID_STRUCT)((UCHAR*)eid_ptr + 2 + eid_ptr->Len);
	}

	return result;
}

/*
	==========================================================================
	Description:
		Measurement report action frame sanity check.

	Parametrs:
		1. MLME message containing the received frame
		2. message length.
		3. Measurement report infomation buffer.
		4. basic report infomation buffer.

	Return	: None.
	==========================================================================
 */

/*
  Measurement Report IE.
  +----+-----+-------+-------------+--------------+----------------+
  | ID | Len | Token | Report Mode | Measure Type | Measure Report |
  +----+-----+-------+-------------+--------------+----------------+
    1     1      1          1             1            variable

  Basic Report.
  +--------+------------+----------+-----+
  | Ch Num | Start Time | Duration | Map |
  +--------+------------+----------+-----+
      1          8           2        1

  Map Field Bit Format.
  +-----+---------------+---------------------+-------+------------+----------+
  | Bss | OFDM Preamble | Unidentified signal | Radar | Unmeasured | Reserved |
  +-----+---------------+---------------------+-------+------------+----------+
     0          1                  2              3         4          5-7
*/
static BOOLEAN PeerMeasureReportSanity(
	IN PRTMP_ADAPTER pAd,
	IN VOID *pMsg,
	IN ULONG MsgLen,
	OUT PUINT8 pDialogToken,
	OUT PMEASURE_REPORT_INFO pMeasureReportInfo,
	OUT PUINT8 pReportBuf)
{
	PFRAME_802_11 Fr = (PFRAME_802_11)pMsg;
	PUCHAR pFramePtr = Fr->Octet;
	BOOLEAN result = FALSE;
	PEID_STRUCT eid_ptr;
	PUCHAR ptr;

	// skip 802.11 header.
	MsgLen -= sizeof(HEADER_802_11);

	// skip category and action code.
	pFramePtr += 2;
	MsgLen -= 2;

	if (pMeasureReportInfo == NULL)
		return result;

	NdisMoveMemory(pDialogToken, pFramePtr, 1);
	pFramePtr += 1;
	MsgLen -= 1;

	eid_ptr = (PEID_STRUCT)pFramePtr;
	while (((UCHAR*)eid_ptr + eid_ptr->Len + 1) < ((PUCHAR)pFramePtr + MsgLen))
	{
		switch(eid_ptr->Eid)
		{
			case IE_MEASUREMENT_REPORT:
				NdisMoveMemory(&pMeasureReportInfo->Token, eid_ptr->Octet, 1);
				NdisMoveMemory(&pMeasureReportInfo->ReportMode, eid_ptr->Octet + 1, 1);
				NdisMoveMemory(&pMeasureReportInfo->ReportType, eid_ptr->Octet + 2, 1);
				if (pMeasureReportInfo->ReportType == RM_BASIC)
				{
					PMEASURE_BASIC_REPORT pReport = (PMEASURE_BASIC_REPORT)pReportBuf;
					ptr = eid_ptr->Octet + 3;
					NdisMoveMemory(&pReport->ChNum, ptr, 1);
					NdisMoveMemory(&pReport->MeasureStartTime, ptr + 1, 8);
					NdisMoveMemory(&pReport->MeasureDuration, ptr + 9, 2);
					NdisMoveMemory(&pReport->Map, ptr + 11, 1);

				}
				else if (pMeasureReportInfo->ReportType == RM_CCA)
				{
					PMEASURE_CCA_REPORT pReport = (PMEASURE_CCA_REPORT)pReportBuf;
					ptr = eid_ptr->Octet + 3;
					NdisMoveMemory(&pReport->ChNum, ptr, 1);
					NdisMoveMemory(&pReport->MeasureStartTime, ptr + 1, 8);
					NdisMoveMemory(&pReport->MeasureDuration, ptr + 9, 2);
					NdisMoveMemory(&pReport->CCA_Busy_Fraction, ptr + 11, 1);

				}
				else if (pMeasureReportInfo->ReportType == RM_RPI_HISTOGRAM)
				{
					PMEASURE_RPI_REPORT pReport = (PMEASURE_RPI_REPORT)pReportBuf;
					ptr = eid_ptr->Octet + 3;
					NdisMoveMemory(&pReport->ChNum, ptr, 1);
					NdisMoveMemory(&pReport->MeasureStartTime, ptr + 1, 8);
					NdisMoveMemory(&pReport->MeasureDuration, ptr + 9, 2);
					NdisMoveMemory(&pReport->RPI_Density, ptr + 11, 8);
				}
				result = TRUE;
                break;

			default:
				break;
		}
		eid_ptr = (PEID_STRUCT)((UCHAR*)eid_ptr + 2 + eid_ptr->Len);
	}

	return result;
}

/*
	==========================================================================
	Description:
		TPC Request action frame sanity check.

	Parametrs:
		1. MLME message containing the received frame
		2. message length.
		3. Dialog Token.

	Return	: None.
	==========================================================================
 */
static BOOLEAN PeerTpcReqSanity(
	IN PRTMP_ADAPTER pAd,
	IN VOID *pMsg,
	IN ULONG MsgLen,
	OUT PUINT8 pDialogToken)
{
	PFRAME_802_11 Fr = (PFRAME_802_11)pMsg;
	PUCHAR pFramePtr = Fr->Octet;
	BOOLEAN result = FALSE;
	PEID_STRUCT eid_ptr;

	MsgLen -= sizeof(HEADER_802_11);

	// skip category and action code.
	pFramePtr += 2;
	MsgLen -= 2;

	if (pDialogToken == NULL)
		return result;

	NdisMoveMemory(pDialogToken, pFramePtr, 1);
	pFramePtr += 1;
	MsgLen -= 1;

	eid_ptr = (PEID_STRUCT)pFramePtr;
	while (((UCHAR*)eid_ptr + eid_ptr->Len + 1) < ((PUCHAR)pFramePtr + MsgLen))
	{
		switch(eid_ptr->Eid)
		{
			case IE_TPC_REQUEST:
				result = TRUE;
                break;

			default:
				break;
		}
		eid_ptr = (PEID_STRUCT)((UCHAR*)eid_ptr + 2 + eid_ptr->Len);
	}

	return result;
}

/*
	==========================================================================
	Description:
		TPC Report action frame sanity check.

	Parametrs:
		1. MLME message containing the received frame
		2. message length.
		3. Dialog Token.
		4. TPC Report IE.

	Return	: None.
	==========================================================================
 */
static BOOLEAN PeerTpcRepSanity(
	IN PRTMP_ADAPTER pAd,
	IN VOID *pMsg,
	IN ULONG MsgLen,
	OUT PUINT8 pDialogToken,
	OUT PTPC_REPORT_INFO pTpcRepInfo)
{
	PFRAME_802_11 Fr = (PFRAME_802_11)pMsg;
	PUCHAR pFramePtr = Fr->Octet;
	BOOLEAN result = FALSE;
	PEID_STRUCT eid_ptr;

	MsgLen -= sizeof(HEADER_802_11);

	// skip category and action code.
	pFramePtr += 2;
	MsgLen -= 2;

	if (pDialogToken == NULL)
		return result;

	NdisMoveMemory(pDialogToken, pFramePtr, 1);
	pFramePtr += 1;
	MsgLen -= 1;

	eid_ptr = (PEID_STRUCT)pFramePtr;
	while (((UCHAR*)eid_ptr + eid_ptr->Len + 1) < ((PUCHAR)pFramePtr + MsgLen))
	{
		switch(eid_ptr->Eid)
		{
			case IE_TPC_REPORT:
				NdisMoveMemory(&pTpcRepInfo->TxPwr, eid_ptr->Octet, 1);
				NdisMoveMemory(&pTpcRepInfo->LinkMargin, eid_ptr->Octet + 1, 1);
				result = TRUE;
                break;

			default:
				break;
		}
		eid_ptr = (PEID_STRUCT)((UCHAR*)eid_ptr + 2 + eid_ptr->Len);
	}

	return result;
}

/*
	==========================================================================
	Description:
		Channel Switch Announcement action frame handler.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
static VOID PeerChSwAnnAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{
	CH_SW_ANN_INFO ChSwAnnInfo;
	PFRAME_802_11 pFr = (PFRAME_802_11)Elem->Msg;
#ifdef CONFIG_STA_SUPPORT
	UCHAR index = 0, Channel = 0, NewChannel = 0;
	ULONG Bssidx = 0;
#endif // CONFIG_STA_SUPPORT //

	NdisZeroMemory(&ChSwAnnInfo, sizeof(CH_SW_ANN_INFO));
	if (! PeerChSwAnnSanity(pAd, Elem->Msg, Elem->MsgLen, &ChSwAnnInfo))
	{
		DBGPRINT(RT_DEBUG_TRACE, ("Invalid Channel Switch Action Frame.\n"));
		return;
	}


#ifdef CONFIG_STA_SUPPORT
	if (pAd->OpMode == OPMODE_STA)
	{
		Bssidx = BssTableSearch(&pAd->ScanTab, pFr->Hdr.Addr3, pAd->CommonCfg.Channel);
		if (Bssidx == BSS_NOT_FOUND)
		{
			DBGPRINT(RT_DEBUG_TRACE, ("PeerChSwAnnAction - Bssidx is not found\n"));
			return;
		}

		DBGPRINT(RT_DEBUG_TRACE, ("\n****Bssidx is %d, Channel = %d\n", index, pAd->ScanTab.BssEntry[Bssidx].Channel));
		hex_dump("SSID",pAd->ScanTab.BssEntry[Bssidx].Bssid ,6);

		Channel = pAd->CommonCfg.Channel;
		NewChannel = ChSwAnnInfo.Channel;

		if ((pAd->CommonCfg.bIEEE80211H == 1) && (NewChannel != 0) && (Channel != NewChannel))
		{
			// Switching to channel 1 can prevent from rescanning the current channel immediately (by auto reconnection).
			// In addition, clear the MLME queue and the scan table to discard the RX packets and previous scanning results.
			AsicSwitchChannel(pAd, 1, FALSE);
			AsicLockChannel(pAd, 1);
		    LinkDown(pAd, FALSE);
			MlmeQueueInit(&pAd->Mlme.Queue);
			BssTableInit(&pAd->ScanTab);
		    RTMPusecDelay(1000000);		// use delay to prevent STA do reassoc

			// channel sanity check
			for (index = 0 ; index < pAd->ChannelListNum; index++)
			{
				if (pAd->ChannelList[index].Channel == NewChannel)
				{
					pAd->ScanTab.BssEntry[Bssidx].Channel = NewChannel;
					pAd->CommonCfg.Channel = NewChannel;
					AsicSwitchChannel(pAd, pAd->CommonCfg.Channel, FALSE);
					AsicLockChannel(pAd, pAd->CommonCfg.Channel);
					DBGPRINT(RT_DEBUG_TRACE, ("&&&&&&&&&&&&&&&&PeerChSwAnnAction - STA receive channel switch announcement IE (New Channel =%d)\n", NewChannel));
					break;
				}
			}

			if (index >= pAd->ChannelListNum)
			{
				DBGPRINT_ERR(("&&&&&&&&&&&&&&&&&&&&&&&&&&PeerChSwAnnAction(can not find New Channel=%d in ChannelList[%d]\n", pAd->CommonCfg.Channel, pAd->ChannelListNum));
			}
		}
	}
#endif // CONFIG_STA_SUPPORT //

	return;
}


/*
	==========================================================================
	Description:
		Measurement Request action frame handler.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
static VOID PeerMeasureReqAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{
	PFRAME_802_11 pFr = (PFRAME_802_11)Elem->Msg;
	UINT8 DialogToken;
	MEASURE_REQ_INFO MeasureReqInfo;
	MEASURE_REPORT_MODE ReportMode;

	if(PeerMeasureReqSanity(pAd, Elem->Msg, Elem->MsgLen, &DialogToken, &MeasureReqInfo))
	{
		ReportMode.word = 0;
		ReportMode.field.Incapable = 1;
		EnqueueMeasurementRep(pAd, pFr->Hdr.Addr2, DialogToken, MeasureReqInfo.Token, ReportMode.word, MeasureReqInfo.ReqType, 0, NULL);
	}

	return;
}

/*
	==========================================================================
	Description:
		Measurement Report action frame handler.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
static VOID PeerMeasureReportAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{
	MEASURE_REPORT_INFO MeasureReportInfo;
	PFRAME_802_11 pFr = (PFRAME_802_11)Elem->Msg;
	UINT8 DialogToken;
	PUINT8 pMeasureReportInfo;

//	if (pAd->CommonCfg.bIEEE80211H != TRUE)
//		return;

	if ((pMeasureReportInfo = kmalloc(sizeof(MEASURE_RPI_REPORT), GFP_ATOMIC)) == NULL)
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s unable to alloc memory for measure report buffer (size=%d).\n", __func__, sizeof(MEASURE_RPI_REPORT)));
		return;
	}

	NdisZeroMemory(&MeasureReportInfo, sizeof(MEASURE_REPORT_INFO));
	NdisZeroMemory(pMeasureReportInfo, sizeof(MEASURE_RPI_REPORT));
	if (PeerMeasureReportSanity(pAd, Elem->Msg, Elem->MsgLen, &DialogToken, &MeasureReportInfo, pMeasureReportInfo))
	{
		do {
			PMEASURE_REQ_ENTRY pEntry = NULL;

			// Not a autonomous measure report.
			// check the dialog token field. drop it if the dialog token doesn't match.
			if ((DialogToken != 0)
				&& ((pEntry = MeasureReqLookUp(pAd, DialogToken)) == NULL))
				break;

			if (pEntry != NULL)
				MeasureReqDelete(pAd, pEntry->DialogToken);

			if (MeasureReportInfo.ReportType == RM_BASIC)
			{
				PMEASURE_BASIC_REPORT pBasicReport = (PMEASURE_BASIC_REPORT)pMeasureReportInfo;
				if ((pBasicReport->Map.field.Radar)
					&& (DfsRequirementCheck(pAd, pBasicReport->ChNum) == TRUE))
				{
					NotifyChSwAnnToPeerAPs(pAd, pFr->Hdr.Addr1, pFr->Hdr.Addr2, 1, pBasicReport->ChNum);
					StartDFSProcedure(pAd, pBasicReport->ChNum, 1);
				}
			}
		} while (FALSE);
	}
	else
		DBGPRINT(RT_DEBUG_TRACE, ("Invalid Measurement Report Frame.\n"));

	kfree(pMeasureReportInfo);

	return;
}

/*
	==========================================================================
	Description:
		TPC Request action frame handler.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
static VOID PeerTpcReqAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{
	PFRAME_802_11 pFr = (PFRAME_802_11)Elem->Msg;
	PUCHAR pFramePtr = pFr->Octet;
	UINT8 DialogToken;
	UINT8 TxPwr = GetCurTxPwr(pAd, Elem->Wcid);
	UINT8 LinkMargin = 0;
	CHAR RealRssi;

	// link margin: Ratio of the received signal power to the minimum desired by the station (STA). The
	//				STA may incorporate rate information and channel conditions, including interference, into its computation
	//				of link margin.

	RealRssi = RTMPMaxRssi(pAd, ConvertToRssi(pAd, Elem->Rssi0, RSSI_0),
								ConvertToRssi(pAd, Elem->Rssi1, RSSI_1),
								ConvertToRssi(pAd, Elem->Rssi2, RSSI_2));

	// skip Category and action code.
	pFramePtr += 2;

	// Dialog token.
	NdisMoveMemory(&DialogToken, pFramePtr, 1);

	LinkMargin = (RealRssi / MIN_RCV_PWR);
	if (PeerTpcReqSanity(pAd, Elem->Msg, Elem->MsgLen, &DialogToken))
		EnqueueTPCRep(pAd, pFr->Hdr.Addr2, DialogToken, TxPwr, LinkMargin);

	return;
}

/*
	==========================================================================
	Description:
		TPC Report action frame handler.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
static VOID PeerTpcRepAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{
	UINT8 DialogToken;
	TPC_REPORT_INFO TpcRepInfo;
	PTPC_REQ_ENTRY pEntry = NULL;

	NdisZeroMemory(&TpcRepInfo, sizeof(TPC_REPORT_INFO));
	if (PeerTpcRepSanity(pAd, Elem->Msg, Elem->MsgLen, &DialogToken, &TpcRepInfo))
	{
		if ((pEntry = TpcReqLookUp(pAd, DialogToken)) != NULL)
		{
			TpcReqDelete(pAd, pEntry->DialogToken);
			DBGPRINT(RT_DEBUG_TRACE, ("%s: DialogToken=%x, TxPwr=%d, LinkMargin=%d\n",
				__func__, DialogToken, TpcRepInfo.TxPwr, TpcRepInfo.LinkMargin));
		}
	}

	return;
}

/*
	==========================================================================
	Description:
		Spectrun action frames Handler such as channel switch annoucement,
		measurement report, measurement request actions frames.

	Parametrs:
		Elme - MLME message containing the received frame

	Return	: None.
	==========================================================================
 */
VOID PeerSpectrumAction(
	IN PRTMP_ADAPTER pAd,
	IN MLME_QUEUE_ELEM *Elem)
{

	UCHAR	Action = Elem->Msg[LENGTH_802_11+1];

	if (pAd->CommonCfg.bIEEE80211H != TRUE)
		return;

	switch(Action)
	{
		case SPEC_MRQ:
			// current rt2860 unable do such measure specified in Measurement Request.
			// reject all measurement request.
			PeerMeasureReqAction(pAd, Elem);
			break;

		case SPEC_MRP:
			PeerMeasureReportAction(pAd, Elem);
			break;

		case SPEC_TPCRQ:
			PeerTpcReqAction(pAd, Elem);
			break;

		case SPEC_TPCRP:
			PeerTpcRepAction(pAd, Elem);
			break;

		case SPEC_CHANNEL_SWITCH:
{
#ifdef DOT11N_DRAFT3
				SEC_CHA_OFFSET_IE	Secondary;
				CHA_SWITCH_ANNOUNCE_IE	ChannelSwitch;

				// 802.11h only has Channel Switch Announcement IE.
				RTMPMoveMemory(&ChannelSwitch, &Elem->Msg[LENGTH_802_11+4], sizeof (CHA_SWITCH_ANNOUNCE_IE));

				// 802.11n D3.03 adds secondary channel offset element in the end.
				if (Elem->MsgLen ==  (LENGTH_802_11 + 2 + sizeof (CHA_SWITCH_ANNOUNCE_IE) + sizeof (SEC_CHA_OFFSET_IE)))
				{
					RTMPMoveMemory(&Secondary, &Elem->Msg[LENGTH_802_11+9], sizeof (SEC_CHA_OFFSET_IE));
				}
				else
				{
					Secondary.SecondaryChannelOffset = 0;
				}

				if ((Elem->Msg[LENGTH_802_11+2] == IE_CHANNEL_SWITCH_ANNOUNCEMENT) && (Elem->Msg[LENGTH_802_11+3] == 3))
				{
					ChannelSwitchAction(pAd, Elem->Wcid, ChannelSwitch.NewChannel, Secondary.SecondaryChannelOffset);
				}
#endif // DOT11N_DRAFT3 //
}
			PeerChSwAnnAction(pAd, Elem);
			break;
	}

	return;
}

/*
	==========================================================================
	Description:

	Parametrs:

	Return	: None.
	==========================================================================
 */
INT Set_MeasureReq_Proc(
	IN	PRTMP_ADAPTER	pAd,
	IN	PUCHAR			arg)
{
	UINT Aid = 1;
	UINT ArgIdx;
	PUCHAR thisChar;

	MEASURE_REQ_MODE MeasureReqMode;
	UINT8 MeasureReqToken = RandomByte(pAd);
	UINT8 MeasureReqType = RM_BASIC;
	UINT8 MeasureCh = 1;

	ArgIdx = 1;
	while ((thisChar = strsep((char **)&arg, "-")) != NULL)
	{
		switch(ArgIdx)
		{
			case 1:	// Aid.
				Aid = simple_strtol(thisChar, 0, 16);
				break;

			case 2: // Measurement Request Type.
				MeasureReqType = simple_strtol(thisChar, 0, 16);
				if (MeasureReqType > 3)
				{
					DBGPRINT(RT_DEBUG_ERROR, ("%s: unknow MeasureReqType(%d)\n", __func__, MeasureReqType));
					return TRUE;
				}
				break;

			case 3: // Measurement channel.
				MeasureCh = simple_strtol(thisChar, 0, 16);
				break;
		}
		ArgIdx++;
	}

	DBGPRINT(RT_DEBUG_TRACE, ("%s::Aid = %d, MeasureReqType=%d MeasureCh=%d\n", __func__, Aid, MeasureReqType, MeasureCh));
	if (!VALID_WCID(Aid))
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: unknow sta of Aid(%d)\n", __func__, Aid));
		return TRUE;
	}

	MeasureReqMode.word = 0;
	MeasureReqMode.field.Enable = 1;

	MeasureReqInsert(pAd, MeasureReqToken);

	EnqueueMeasurementReq(pAd, pAd->MacTab.Content[Aid].Addr,
		MeasureReqToken, MeasureReqMode.word, MeasureReqType, MeasureCh, 2000);

	return TRUE;
}

INT Set_TpcReq_Proc(
	IN	PRTMP_ADAPTER	pAd,
	IN	PUCHAR			arg)
{
	UINT Aid;

	UINT8 TpcReqToken = RandomByte(pAd);

	Aid = simple_strtol(arg, 0, 16);

	DBGPRINT(RT_DEBUG_TRACE, ("%s::Aid = %d\n", __func__, Aid));
	if (!VALID_WCID(Aid))
	{
		DBGPRINT(RT_DEBUG_ERROR, ("%s: unknow sta of Aid(%d)\n", __func__, Aid));
		return TRUE;
	}

	TpcReqInsert(pAd, TpcReqToken);

	EnqueueTPCReq(pAd, pAd->MacTab.Content[Aid].Addr, TpcReqToken);

	return TRUE;
}